[patch 00/27] zfcp updates for 2.6.32

[patch 00/27] zfcp updates for 2.6.32

[Christof Schmitt]

James,

here is the series of zfcp updates for the 2.6.32 merge window. Most
patches are concerned with code simplifications and minor
improvements. With these patches, zfcp no longer uses the old
kernel_thread API and no longer semaphores.

The last patch "zfcp: optimize zfcp_qdio_account" uses a new s390
function that is introduced with the s390 patch "introduce
get_clock_monotonic", see http://marc.info/?l=linux-s390&m=125024973232085&w=2
The zfcp patch applies cleanly, but compilation on s390 fails without the
s390 patch. This should be no problem for the linux-next tree, since
linux-next also includes the s390 git tree.

--
Christof Schmitt

[patch 01/27] zfcp: invalid usage after free of port resources

[Christof Schmitt]

[-- Attachment #1: 700-zfcp-use-after-free.diff --]
[-- Type: text/plain, Size: 1989 bytes --]

From: Swen Schillig <swen@vnet.ibm.com>

In certain error scenarios ports, rports are getting attached, 
validated and removed from the systems environment. Depending on the
layer this occurs asynchronously. This patch fixes the few races
which existed and ensures all references and cross references are 
cleared at the time they're invalid. In addition fc transports
actions are only scheduled when required.

Signed-off-by: Swen Schillig <swen@vnet.ibm.com> 
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---

 drivers/s390/scsi/zfcp_aux.c  |    7 +++++--
 drivers/s390/scsi/zfcp_scsi.c |    6 ++++--
 2 files changed, 9 insertions(+), 4 deletions(-)

--- a/drivers/s390/scsi/zfcp_aux.c	2009-08-17 11:28:54.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_aux.c	2009-08-17 11:28:56.000000000 +0200
@@ -672,12 +672,15 @@ err_out:
  */
 void zfcp_port_dequeue(struct zfcp_port *port)
 {
-	wait_event(port->remove_wq, atomic_read(&port->refcount) == 0);
 	write_lock_irq(&zfcp_data.config_lock);
 	list_del(&port->list);
 	write_unlock_irq(&zfcp_data.config_lock);
-	if (port->rport)
+	if (port->rport) {
 		port->rport->dd_data = NULL;
+		port->rport = NULL;
+	}
+	wait_event(port->remove_wq, atomic_read(&port->refcount) == 0);
+	cancel_work_sync(&port->rport_work); /* usually not necessary */
 	zfcp_adapter_put(port->adapter);
 	sysfs_remove_group(&port->sysfs_device.kobj, &zfcp_sysfs_port_attrs);
 	device_unregister(&port->sysfs_device);
--- a/drivers/s390/scsi/zfcp_scsi.c	2009-08-17 11:28:54.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_scsi.c	2009-08-17 11:28:56.000000000 +0200
@@ -582,8 +582,10 @@ void zfcp_scsi_schedule_rport_block(stru
 	zfcp_port_get(port);
 	port->rport_task = RPORT_DEL;
 
-	if (!queue_work(zfcp_data.work_queue, &port->rport_work))
-		zfcp_port_put(port);
+	if (port->rport && queue_work(zfcp_data.work_queue, &port->rport_work))
+		return;
+
+	zfcp_port_put(port);
 }
 
 void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter)

[patch 02/27] zfcp: Move debug data from zfcp_data to own data structure

[Christof Schmitt]

[-- Attachment #1: 701-zfcp-debug-data.diff --]
[-- Type: text/plain, Size: 21930 bytes --]

From: Christof Schmitt <christof.schmitt@de.ibm.com>

The struct zfcp_adapter includes everything related to the debug
traces. This introduces dependences between the definitions in
zfcp_def.h and zfcp_dbf.h. Move all debug related data structures to a
new data structure to break those dependencies and manage the debug
data in zfcp_dbf.[hc].

Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---

 drivers/s390/scsi/zfcp_aux.c |    4 
 drivers/s390/scsi/zfcp_dbf.c |  217 ++++++++++++++++++++++++-------------------
 drivers/s390/scsi/zfcp_dbf.h |   17 +++
 drivers/s390/scsi/zfcp_def.h |   15 --
 drivers/s390/scsi/zfcp_fsf.h |    3 
 5 files changed, 143 insertions(+), 113 deletions(-)

--- a/drivers/s390/scsi/zfcp_aux.c	2009-08-17 11:28:56.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_aux.c	2009-08-17 11:29:05.000000000 +0200
@@ -502,10 +502,6 @@ int zfcp_adapter_enqueue(struct ccw_devi
 
 	spin_lock_init(&adapter->req_list_lock);
 
-	spin_lock_init(&adapter->hba_dbf_lock);
-	spin_lock_init(&adapter->san_dbf_lock);
-	spin_lock_init(&adapter->scsi_dbf_lock);
-	spin_lock_init(&adapter->rec_dbf_lock);
 	spin_lock_init(&adapter->req_q_lock);
 	spin_lock_init(&adapter->qdio_stat_lock);
 
--- a/drivers/s390/scsi/zfcp_dbf.c	2009-08-17 11:28:54.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_dbf.c	2009-08-17 11:29:05.000000000 +0200
@@ -3,7 +3,7 @@
  *
  * Debug traces for zfcp.
  *
- * Copyright IBM Corporation 2002, 2008
+ * Copyright IBM Corporation 2002, 2009
  */
 
 #define KMSG_COMPONENT "zfcp"
@@ -11,6 +11,7 @@
 
 #include <linux/ctype.h>
 #include <asm/debug.h>
+#include "zfcp_dbf.h"
 #include "zfcp_ext.h"
 
 static u32 dbfsize = 4;
@@ -126,6 +127,7 @@ static int zfcp_dbf_view_header(debug_in
 void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *fsf_req)
 {
 	struct zfcp_adapter *adapter = fsf_req->adapter;
+	struct zfcp_dbf *dbf = adapter->dbf;
 	struct fsf_qtcb *qtcb = fsf_req->qtcb;
 	union fsf_prot_status_qual *prot_status_qual =
 					&qtcb->prefix.prot_status_qual;
@@ -134,12 +136,12 @@ void zfcp_hba_dbf_event_fsf_response(str
 	struct zfcp_port *port;
 	struct zfcp_unit *unit;
 	struct zfcp_send_els *send_els;
-	struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
+	struct zfcp_hba_dbf_record *rec = &dbf->hba_dbf_buf;
 	struct zfcp_hba_dbf_record_response *response = &rec->u.response;
 	int level;
 	unsigned long flags;
 
-	spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
+	spin_lock_irqsave(&dbf->hba_dbf_lock, flags);
 	memset(rec, 0, sizeof(*rec));
 	strncpy(rec->tag, "resp", ZFCP_DBF_TAG_SIZE);
 
@@ -224,7 +226,7 @@ void zfcp_hba_dbf_event_fsf_response(str
 		break;
 	}
 
-	debug_event(adapter->hba_dbf, level, rec, sizeof(*rec));
+	debug_event(dbf->hba_dbf, level, rec, sizeof(*rec));
 
 	/* have fcp channel microcode fixed to use as little as possible */
 	if (fsf_req->fsf_command != FSF_QTCB_FCP_CMND) {
@@ -232,11 +234,11 @@ void zfcp_hba_dbf_event_fsf_response(str
 		char *buf = (char *)qtcb + qtcb->header.log_start;
 		int len = qtcb->header.log_length;
 		for (; len && !buf[len - 1]; len--);
-		zfcp_dbf_hexdump(adapter->hba_dbf, rec, sizeof(*rec), level,
-				 buf, len);
+		zfcp_dbf_hexdump(dbf->hba_dbf, rec, sizeof(*rec), level, buf,
+				 len);
 	}
 
-	spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
+	spin_unlock_irqrestore(&dbf->hba_dbf_lock, flags);
 }
 
 /**
@@ -248,10 +250,11 @@ void zfcp_hba_dbf_event_fsf_response(str
 void zfcp_hba_dbf_event_fsf_unsol(const char *tag, struct zfcp_adapter *adapter,
 				  struct fsf_status_read_buffer *status_buffer)
 {
-	struct zfcp_hba_dbf_record *rec = &adapter->hba_dbf_buf;
+	struct zfcp_dbf *dbf = adapter->dbf;
+	struct zfcp_hba_dbf_record *rec = &dbf->hba_dbf_buf;
 	unsigned long flags;
 
-	spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
+	spin_lock_irqsave(&dbf->hba_dbf_lock, flags);
 	memset(rec, 0, sizeof(*rec));
 	strncpy(rec->tag, "stat", ZFCP_DBF_TAG_SIZE);
 	strncpy(rec->tag2, tag, ZFCP_DBF_TAG_SIZE);
@@ -293,8 +296,8 @@ void zfcp_hba_dbf_event_fsf_unsol(const 
 		       &status_buffer->payload, rec->u.status.payload_size);
 	}
 
-	debug_event(adapter->hba_dbf, 2, rec, sizeof(*rec));
-	spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
+	debug_event(dbf->hba_dbf, 2, rec, sizeof(*rec));
+	spin_unlock_irqrestore(&dbf->hba_dbf_lock, flags);
 }
 
 /**
@@ -308,17 +311,18 @@ void zfcp_hba_dbf_event_qdio(struct zfcp
 			     unsigned int qdio_error, int sbal_index,
 			     int sbal_count)
 {
-	struct zfcp_hba_dbf_record *r = &adapter->hba_dbf_buf;
+	struct zfcp_dbf *dbf = adapter->dbf;
+	struct zfcp_hba_dbf_record *r = &dbf->hba_dbf_buf;
 	unsigned long flags;
 
-	spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
+	spin_lock_irqsave(&dbf->hba_dbf_lock, flags);
 	memset(r, 0, sizeof(*r));
 	strncpy(r->tag, "qdio", ZFCP_DBF_TAG_SIZE);
 	r->u.qdio.qdio_error = qdio_error;
 	r->u.qdio.sbal_index = sbal_index;
 	r->u.qdio.sbal_count = sbal_count;
-	debug_event(adapter->hba_dbf, 0, r, sizeof(*r));
-	spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
+	debug_event(dbf->hba_dbf, 0, r, sizeof(*r));
+	spin_unlock_irqrestore(&dbf->hba_dbf_lock, flags);
 }
 
 /**
@@ -329,17 +333,18 @@ void zfcp_hba_dbf_event_qdio(struct zfcp
 void zfcp_hba_dbf_event_berr(struct zfcp_adapter *adapter,
 			     struct zfcp_fsf_req *req)
 {
-	struct zfcp_hba_dbf_record *r = &adapter->hba_dbf_buf;
+	struct zfcp_dbf *dbf = adapter->dbf;
+	struct zfcp_hba_dbf_record *r = &dbf->hba_dbf_buf;
 	struct fsf_status_read_buffer *sr_buf = req->data;
 	struct fsf_bit_error_payload *err = &sr_buf->payload.bit_error;
 	unsigned long flags;
 
-	spin_lock_irqsave(&adapter->hba_dbf_lock, flags);
+	spin_lock_irqsave(&dbf->hba_dbf_lock, flags);
 	memset(r, 0, sizeof(*r));
 	strncpy(r->tag, "berr", ZFCP_DBF_TAG_SIZE);
 	memcpy(&r->u.berr, err, sizeof(struct fsf_bit_error_payload));
-	debug_event(adapter->hba_dbf, 0, r, sizeof(*r));
-	spin_unlock_irqrestore(&adapter->hba_dbf_lock, flags);
+	debug_event(dbf->hba_dbf, 0, r, sizeof(*r));
+	spin_unlock_irqrestore(&dbf->hba_dbf_lock, flags);
 }
 static void zfcp_hba_dbf_view_response(char **p,
 				       struct zfcp_hba_dbf_record_response *r)
@@ -554,7 +559,8 @@ static struct debug_view zfcp_rec_dbf_vi
  */
 void zfcp_rec_dbf_event_thread(char *id2, struct zfcp_adapter *adapter)
 {
-	struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
+	struct zfcp_dbf *dbf = adapter->dbf;
+	struct zfcp_rec_dbf_record *r = &dbf->rec_dbf_buf;
 	unsigned long flags = 0;
 	struct list_head *entry;
 	unsigned ready = 0, running = 0, total;
@@ -565,15 +571,15 @@ void zfcp_rec_dbf_event_thread(char *id2
 		running++;
 	total = adapter->erp_total_count;
 
-	spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
+	spin_lock_irqsave(&dbf->rec_dbf_lock, flags);
 	memset(r, 0, sizeof(*r));
 	r->id = ZFCP_REC_DBF_ID_THREAD;
 	memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
 	r->u.thread.total = total;
 	r->u.thread.ready = ready;
 	r->u.thread.running = running;
-	debug_event(adapter->rec_dbf, 6, r, sizeof(*r));
-	spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
+	debug_event(dbf->rec_dbf, 6, r, sizeof(*r));
+	spin_unlock_irqrestore(&dbf->rec_dbf_lock, flags);
 }
 
 /**
@@ -596,10 +602,11 @@ static void zfcp_rec_dbf_event_target(ch
 				      atomic_t *status, atomic_t *erp_count,
 				      u64 wwpn, u32 d_id, u64 fcp_lun)
 {
-	struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
+	struct zfcp_dbf *dbf = adapter->dbf;
+	struct zfcp_rec_dbf_record *r = &dbf->rec_dbf_buf;
 	unsigned long flags;
 
-	spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
+	spin_lock_irqsave(&dbf->rec_dbf_lock, flags);
 	memset(r, 0, sizeof(*r));
 	r->id = ZFCP_REC_DBF_ID_TARGET;
 	memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
@@ -609,8 +616,8 @@ static void zfcp_rec_dbf_event_target(ch
 	r->u.target.d_id = d_id;
 	r->u.target.fcp_lun = fcp_lun;
 	r->u.target.erp_count = atomic_read(erp_count);
-	debug_event(adapter->rec_dbf, 3, r, sizeof(*r));
-	spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
+	debug_event(dbf->rec_dbf, 3, r, sizeof(*r));
+	spin_unlock_irqrestore(&dbf->rec_dbf_lock, flags);
 }
 
 /**
@@ -672,10 +679,11 @@ void zfcp_rec_dbf_event_trigger(char *id
 				void *action, struct zfcp_adapter *adapter,
 				struct zfcp_port *port, struct zfcp_unit *unit)
 {
-	struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
+	struct zfcp_dbf *dbf = adapter->dbf;
+	struct zfcp_rec_dbf_record *r = &dbf->rec_dbf_buf;
 	unsigned long flags;
 
-	spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
+	spin_lock_irqsave(&dbf->rec_dbf_lock, flags);
 	memset(r, 0, sizeof(*r));
 	r->id = ZFCP_REC_DBF_ID_TRIGGER;
 	memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
@@ -692,8 +700,8 @@ void zfcp_rec_dbf_event_trigger(char *id
 		r->u.trigger.us = atomic_read(&unit->status);
 		r->u.trigger.fcp_lun = unit->fcp_lun;
 	}
-	debug_event(adapter->rec_dbf, action ? 1 : 4, r, sizeof(*r));
-	spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
+	debug_event(dbf->rec_dbf, action ? 1 : 4, r, sizeof(*r));
+	spin_unlock_irqrestore(&dbf->rec_dbf_lock, flags);
 }
 
 /**
@@ -704,10 +712,11 @@ void zfcp_rec_dbf_event_trigger(char *id
 void zfcp_rec_dbf_event_action(char *id2, struct zfcp_erp_action *erp_action)
 {
 	struct zfcp_adapter *adapter = erp_action->adapter;
-	struct zfcp_rec_dbf_record *r = &adapter->rec_dbf_buf;
+	struct zfcp_dbf *dbf = adapter->dbf;
+	struct zfcp_rec_dbf_record *r = &dbf->rec_dbf_buf;
 	unsigned long flags;
 
-	spin_lock_irqsave(&adapter->rec_dbf_lock, flags);
+	spin_lock_irqsave(&dbf->rec_dbf_lock, flags);
 	memset(r, 0, sizeof(*r));
 	r->id = ZFCP_REC_DBF_ID_ACTION;
 	memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
@@ -715,8 +724,8 @@ void zfcp_rec_dbf_event_action(char *id2
 	r->u.action.status = erp_action->status;
 	r->u.action.step = erp_action->step;
 	r->u.action.fsf_req = (unsigned long)erp_action->fsf_req;
-	debug_event(adapter->rec_dbf, 5, r, sizeof(*r));
-	spin_unlock_irqrestore(&adapter->rec_dbf_lock, flags);
+	debug_event(dbf->rec_dbf, 5, r, sizeof(*r));
+	spin_unlock_irqrestore(&dbf->rec_dbf_lock, flags);
 }
 
 /**
@@ -728,13 +737,14 @@ void zfcp_san_dbf_event_ct_request(struc
 	struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 	struct zfcp_wka_port *wka_port = ct->wka_port;
 	struct zfcp_adapter *adapter = wka_port->adapter;
+	struct zfcp_dbf *dbf = adapter->dbf;
 	struct ct_hdr *hdr = sg_virt(ct->req);
-	struct zfcp_san_dbf_record *r = &adapter->san_dbf_buf;
+	struct zfcp_san_dbf_record *r = &dbf->san_dbf_buf;
 	struct zfcp_san_dbf_record_ct_request *oct = &r->u.ct_req;
 	int level = 3;
 	unsigned long flags;
 
-	spin_lock_irqsave(&adapter->san_dbf_lock, flags);
+	spin_lock_irqsave(&dbf->san_dbf_lock, flags);
 	memset(r, 0, sizeof(*r));
 	strncpy(r->tag, "octc", ZFCP_DBF_TAG_SIZE);
 	r->fsf_reqid = fsf_req->req_id;
@@ -749,10 +759,10 @@ void zfcp_san_dbf_event_ct_request(struc
 	oct->max_res_size = hdr->max_res_size;
 	oct->len = min((int)ct->req->length - (int)sizeof(struct ct_hdr),
 		       ZFCP_DBF_SAN_MAX_PAYLOAD);
-	debug_event(adapter->san_dbf, level, r, sizeof(*r));
-	zfcp_dbf_hexdump(adapter->san_dbf, r, sizeof(*r), level,
+	debug_event(dbf->san_dbf, level, r, sizeof(*r));
+	zfcp_dbf_hexdump(dbf->san_dbf, r, sizeof(*r), level,
 			 (void *)hdr + sizeof(struct ct_hdr), oct->len);
-	spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
+	spin_unlock_irqrestore(&dbf->san_dbf_lock, flags);
 }
 
 /**
@@ -765,12 +775,13 @@ void zfcp_san_dbf_event_ct_response(stru
 	struct zfcp_wka_port *wka_port = ct->wka_port;
 	struct zfcp_adapter *adapter = wka_port->adapter;
 	struct ct_hdr *hdr = sg_virt(ct->resp);
-	struct zfcp_san_dbf_record *r = &adapter->san_dbf_buf;
+	struct zfcp_dbf *dbf = adapter->dbf;
+	struct zfcp_san_dbf_record *r = &dbf->san_dbf_buf;
 	struct zfcp_san_dbf_record_ct_response *rct = &r->u.ct_resp;
 	int level = 3;
 	unsigned long flags;
 
-	spin_lock_irqsave(&adapter->san_dbf_lock, flags);
+	spin_lock_irqsave(&dbf->san_dbf_lock, flags);
 	memset(r, 0, sizeof(*r));
 	strncpy(r->tag, "rctc", ZFCP_DBF_TAG_SIZE);
 	r->fsf_reqid = fsf_req->req_id;
@@ -785,10 +796,10 @@ void zfcp_san_dbf_event_ct_response(stru
 	rct->max_res_size = hdr->max_res_size;
 	rct->len = min((int)ct->resp->length - (int)sizeof(struct ct_hdr),
 		       ZFCP_DBF_SAN_MAX_PAYLOAD);
-	debug_event(adapter->san_dbf, level, r, sizeof(*r));
-	zfcp_dbf_hexdump(adapter->san_dbf, r, sizeof(*r), level,
+	debug_event(dbf->san_dbf, level, r, sizeof(*r));
+	zfcp_dbf_hexdump(dbf->san_dbf, r, sizeof(*r), level,
 			 (void *)hdr + sizeof(struct ct_hdr), rct->len);
-	spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
+	spin_unlock_irqrestore(&dbf->san_dbf_lock, flags);
 }
 
 static void zfcp_san_dbf_event_els(const char *tag, int level,
@@ -797,10 +808,11 @@ static void zfcp_san_dbf_event_els(const
 				   int buflen)
 {
 	struct zfcp_adapter *adapter = fsf_req->adapter;
-	struct zfcp_san_dbf_record *rec = &adapter->san_dbf_buf;
+	struct zfcp_dbf *dbf = adapter->dbf;
+	struct zfcp_san_dbf_record *rec = &dbf->san_dbf_buf;
 	unsigned long flags;
 
-	spin_lock_irqsave(&adapter->san_dbf_lock, flags);
+	spin_lock_irqsave(&dbf->san_dbf_lock, flags);
 	memset(rec, 0, sizeof(*rec));
 	strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 	rec->fsf_reqid = fsf_req->req_id;
@@ -808,10 +820,10 @@ static void zfcp_san_dbf_event_els(const
 	rec->s_id = s_id;
 	rec->d_id = d_id;
 	rec->u.els.ls_code = ls_code;
-	debug_event(adapter->san_dbf, level, rec, sizeof(*rec));
-	zfcp_dbf_hexdump(adapter->san_dbf, rec, sizeof(*rec), level,
+	debug_event(dbf->san_dbf, level, rec, sizeof(*rec));
+	zfcp_dbf_hexdump(dbf->san_dbf, rec, sizeof(*rec), level,
 			 buffer, min(buflen, ZFCP_DBF_SAN_MAX_PAYLOAD));
-	spin_unlock_irqrestore(&adapter->san_dbf_lock, flags);
+	spin_unlock_irqrestore(&dbf->san_dbf_lock, flags);
 }
 
 /**
@@ -915,14 +927,15 @@ static void zfcp_scsi_dbf_event(const ch
 				struct zfcp_fsf_req *fsf_req,
 				unsigned long old_req_id)
 {
-	struct zfcp_scsi_dbf_record *rec = &adapter->scsi_dbf_buf;
+	struct zfcp_dbf *dbf = adapter->dbf;
+	struct zfcp_scsi_dbf_record *rec = &dbf->scsi_dbf_buf;
 	struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
 	unsigned long flags;
 	struct fcp_rsp_iu *fcp_rsp;
 	char *fcp_rsp_info = NULL, *fcp_sns_info = NULL;
 	int offset = 0, buflen = 0;
 
-	spin_lock_irqsave(&adapter->scsi_dbf_lock, flags);
+	spin_lock_irqsave(&dbf->scsi_dbf_lock, flags);
 	do {
 		memset(rec, 0, sizeof(*rec));
 		if (offset == 0) {
@@ -981,9 +994,9 @@ static void zfcp_scsi_dbf_event(const ch
 			memcpy(dump->data, fcp_sns_info + offset, dump->size);
 			offset += dump->size;
 		}
-		debug_event(adapter->scsi_dbf, level, rec, sizeof(*rec));
+		debug_event(dbf->scsi_dbf, level, rec, sizeof(*rec));
 	} while (offset < buflen);
-	spin_unlock_irqrestore(&adapter->scsi_dbf_lock, flags);
+	spin_unlock_irqrestore(&dbf->scsi_dbf_lock, flags);
 }
 
 /**
@@ -1087,6 +1100,22 @@ static struct debug_view zfcp_scsi_dbf_v
 	NULL
 };
 
+static debug_info_t *zfcp_dbf_reg(const char *name, int level,
+				  struct debug_view *view, int size)
+{
+	struct debug_info *d;
+
+	d = debug_register(name, dbfsize, level, size);
+	if (!d)
+		return NULL;
+
+	debug_register_view(d, &debug_hex_ascii_view);
+	debug_register_view(d, view);
+	debug_set_level(d, level);
+
+	return d;
+}
+
 /**
  * zfcp_adapter_debug_register - registers debug feature for an adapter
  * @adapter: pointer to adapter for which debug features should be registered
@@ -1095,52 +1124,56 @@ static struct debug_view zfcp_scsi_dbf_v
 int zfcp_adapter_debug_register(struct zfcp_adapter *adapter)
 {
 	char dbf_name[DEBUG_MAX_NAME_LEN];
+	struct zfcp_dbf *dbf;
+
+	dbf = kmalloc(sizeof(struct zfcp_dbf), GFP_KERNEL);
+	if (!dbf)
+		return -ENOMEM;
+
+	spin_lock_init(&dbf->hba_dbf_lock);
+	spin_lock_init(&dbf->san_dbf_lock);
+	spin_lock_init(&dbf->scsi_dbf_lock);
+	spin_lock_init(&dbf->rec_dbf_lock);
 
 	/* debug feature area which records recovery activity */
 	sprintf(dbf_name, "zfcp_%s_rec", dev_name(&adapter->ccw_device->dev));
-	adapter->rec_dbf = debug_register(dbf_name, dbfsize, 1,
-					  sizeof(struct zfcp_rec_dbf_record));
-	if (!adapter->rec_dbf)
-		goto failed;
-	debug_register_view(adapter->rec_dbf, &debug_hex_ascii_view);
-	debug_register_view(adapter->rec_dbf, &zfcp_rec_dbf_view);
-	debug_set_level(adapter->rec_dbf, 3);
+	dbf->rec_dbf = zfcp_dbf_reg(dbf_name, 3, &zfcp_rec_dbf_view,
+				    sizeof(struct zfcp_rec_dbf_record));
+	if (!dbf->rec_dbf)
+		goto fail_rec;
 
 	/* debug feature area which records HBA (FSF and QDIO) conditions */
 	sprintf(dbf_name, "zfcp_%s_hba", dev_name(&adapter->ccw_device->dev));
-	adapter->hba_dbf = debug_register(dbf_name, dbfsize, 1,
-					  sizeof(struct zfcp_hba_dbf_record));
-	if (!adapter->hba_dbf)
-		goto failed;
-	debug_register_view(adapter->hba_dbf, &debug_hex_ascii_view);
-	debug_register_view(adapter->hba_dbf, &zfcp_hba_dbf_view);
-	debug_set_level(adapter->hba_dbf, 3);
+	dbf->hba_dbf = zfcp_dbf_reg(dbf_name, 3, &zfcp_hba_dbf_view,
+				    sizeof(struct zfcp_hba_dbf_record));
+	if (!dbf->hba_dbf)
+		goto fail_hba;
 
 	/* debug feature area which records SAN command failures and recovery */
 	sprintf(dbf_name, "zfcp_%s_san", dev_name(&adapter->ccw_device->dev));
-	adapter->san_dbf = debug_register(dbf_name, dbfsize, 1,
-					  sizeof(struct zfcp_san_dbf_record));
-	if (!adapter->san_dbf)
-		goto failed;
-	debug_register_view(adapter->san_dbf, &debug_hex_ascii_view);
-	debug_register_view(adapter->san_dbf, &zfcp_san_dbf_view);
-	debug_set_level(adapter->san_dbf, 6);
+	dbf->san_dbf = zfcp_dbf_reg(dbf_name, 6, &zfcp_san_dbf_view,
+				    sizeof(struct zfcp_san_dbf_record));
+	if (!dbf->san_dbf)
+		goto fail_san;
 
 	/* debug feature area which records SCSI command failures and recovery */
 	sprintf(dbf_name, "zfcp_%s_scsi", dev_name(&adapter->ccw_device->dev));
-	adapter->scsi_dbf = debug_register(dbf_name, dbfsize, 1,
-					   sizeof(struct zfcp_scsi_dbf_record));
-	if (!adapter->scsi_dbf)
-		goto failed;
-	debug_register_view(adapter->scsi_dbf, &debug_hex_ascii_view);
-	debug_register_view(adapter->scsi_dbf, &zfcp_scsi_dbf_view);
-	debug_set_level(adapter->scsi_dbf, 3);
+	dbf->scsi_dbf = zfcp_dbf_reg(dbf_name, 3, &zfcp_scsi_dbf_view,
+				     sizeof(struct zfcp_scsi_dbf_record));
+	if (!dbf->scsi_dbf)
+		goto fail_scsi;
 
+	adapter->dbf = dbf;
 	return 0;
 
- failed:
-	zfcp_adapter_debug_unregister(adapter);
-
+fail_scsi:
+	debug_unregister(dbf->san_dbf);
+fail_san:
+	debug_unregister(dbf->hba_dbf);
+fail_hba:
+	debug_unregister(dbf->rec_dbf);
+fail_rec:
+	kfree(dbf);
 	return -ENOMEM;
 }
 
@@ -1150,12 +1183,10 @@ int zfcp_adapter_debug_register(struct z
  */
 void zfcp_adapter_debug_unregister(struct zfcp_adapter *adapter)
 {
-	debug_unregister(adapter->scsi_dbf);
-	debug_unregister(adapter->san_dbf);
-	debug_unregister(adapter->hba_dbf);
-	debug_unregister(adapter->rec_dbf);
-	adapter->scsi_dbf = NULL;
-	adapter->san_dbf = NULL;
-	adapter->hba_dbf = NULL;
-	adapter->rec_dbf = NULL;
+	debug_unregister(adapter->dbf->scsi_dbf);
+	debug_unregister(adapter->dbf->san_dbf);
+	debug_unregister(adapter->dbf->hba_dbf);
+	debug_unregister(adapter->dbf->rec_dbf);
+	kfree(adapter->dbf);
+	adapter->dbf = NULL;
 }
--- a/drivers/s390/scsi/zfcp_dbf.h	2009-08-17 11:28:54.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_dbf.h	2009-08-17 11:29:05.000000000 +0200
@@ -2,7 +2,7 @@
  * This file is part of the zfcp device driver for
  * FCP adapters for IBM System z9 and zSeries.
  *
- * Copyright IBM Corp. 2008, 2008
+ * Copyright IBM Corp. 2008, 2009
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -222,4 +222,19 @@ struct zfcp_scsi_dbf_record {
 	u8 sns_info[ZFCP_DBF_SCSI_FCP_SNS_INFO];
 } __attribute__ ((packed));
 
+struct zfcp_dbf {
+	debug_info_t			*rec_dbf;
+	debug_info_t			*hba_dbf;
+	debug_info_t			*san_dbf;
+	debug_info_t			*scsi_dbf;
+	spinlock_t			rec_dbf_lock;
+	spinlock_t			hba_dbf_lock;
+	spinlock_t			san_dbf_lock;
+	spinlock_t			scsi_dbf_lock;
+	struct zfcp_rec_dbf_record	rec_dbf_buf;
+	struct zfcp_hba_dbf_record	hba_dbf_buf;
+	struct zfcp_san_dbf_record	san_dbf_buf;
+	struct zfcp_scsi_dbf_record	scsi_dbf_buf;
+};
+
 #endif /* ZFCP_DBF_H */
--- a/drivers/s390/scsi/zfcp_def.h	2009-08-17 11:28:54.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_def.h	2009-08-17 11:29:05.000000000 +0200
@@ -37,10 +37,8 @@
 #include <asm/debug.h>
 #include <asm/ebcdic.h>
 #include <asm/sysinfo.h>
-#include "zfcp_dbf.h"
 #include "zfcp_fsf.h"
 
-
 /********************* GENERAL DEFINES *********************************/
 
 #define REQUEST_LIST_SIZE 128
@@ -468,18 +466,7 @@ struct zfcp_adapter {
 	u32			erp_low_mem_count; /* nr of erp actions waiting
 						      for memory */
 	struct zfcp_wka_ports	*gs;		   /* generic services */
-	debug_info_t		*rec_dbf;
-	debug_info_t		*hba_dbf;
-	debug_info_t		*san_dbf;          /* debug feature areas */
-	debug_info_t		*scsi_dbf;
-	spinlock_t		rec_dbf_lock;
-	spinlock_t		hba_dbf_lock;
-	spinlock_t		san_dbf_lock;
-	spinlock_t		scsi_dbf_lock;
-	struct zfcp_rec_dbf_record	rec_dbf_buf;
-	struct zfcp_hba_dbf_record	hba_dbf_buf;
-	struct zfcp_san_dbf_record	san_dbf_buf;
-	struct zfcp_scsi_dbf_record	scsi_dbf_buf;
+	struct zfcp_dbf		*dbf;		   /* debug traces */
 	struct zfcp_adapter_mempool	pool;      /* Adapter memory pools */
 	struct qdio_initialize  qdio_init_data;    /* for qdio_establish */
 	struct fc_host_statistics *fc_stats;
--- a/drivers/s390/scsi/zfcp_fsf.h	2009-08-17 11:28:54.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fsf.h	2009-08-17 11:29:05.000000000 +0200
@@ -3,13 +3,14 @@
  *
  * Interface to the FSF support functions.
  *
- * Copyright IBM Corporation 2002, 2008
+ * Copyright IBM Corporation 2002, 2009
  */
 
 #ifndef FSF_H
 #define FSF_H
 
 #include <linux/pfn.h>
+#include <linux/scatterlist.h>
 
 #define FSF_QTCB_CURRENT_VERSION		0x00000001
 

[patch 03/27] zfcp: Only collect SCSI debug data for matching trace levels

[Christof Schmitt]

[-- Attachment #1: 702-zfcp-debug-data.diff --]
[-- Type: text/plain, Size: 8897 bytes --]

From: Christof Schmitt <christof.schmitt@de.ibm.com>

The default trace level is to only trace failed SCSI commands. Thus it
is not necessary to collect trace data for most SCSI commands since it
will be thrown away later. Restructure the SCSI trace infrastructure
to first check the trace level in a inline function and only do the
expensive data collection for matching trace levels.

Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---

 drivers/s390/scsi/zfcp_dbf.c  |   58 ++------------------------------------
 drivers/s390/scsi/zfcp_dbf.h  |   63 ++++++++++++++++++++++++++++++++++++++++++
 drivers/s390/scsi/zfcp_ext.h  |   11 ++-----
 drivers/s390/scsi/zfcp_fsf.c  |    1 
 drivers/s390/scsi/zfcp_scsi.c |    3 +-
 5 files changed, 73 insertions(+), 63 deletions(-)

diff -urpN linux-2.6/drivers/s390/scsi/zfcp_dbf.c linux-2.6-patched/drivers/s390/scsi/zfcp_dbf.c
--- linux-2.6/drivers/s390/scsi/zfcp_dbf.c	2009-08-12 10:05:28.000000000 +0200
+++ linux-2.6-patched/drivers/s390/scsi/zfcp_dbf.c	2009-08-12 10:05:28.000000000 +0200
@@ -921,13 +921,11 @@ static struct debug_view zfcp_san_dbf_vi
 	NULL
 };
 
-static void zfcp_scsi_dbf_event(const char *tag, const char *tag2, int level,
-				struct zfcp_adapter *adapter,
-				struct scsi_cmnd *scsi_cmnd,
-				struct zfcp_fsf_req *fsf_req,
-				unsigned long old_req_id)
+void _zfcp_scsi_dbf_event(const char *tag, const char *tag2, int level,
+			  struct zfcp_dbf *dbf, struct scsi_cmnd *scsi_cmnd,
+			  struct zfcp_fsf_req *fsf_req,
+			  unsigned long old_req_id)
 {
-	struct zfcp_dbf *dbf = adapter->dbf;
 	struct zfcp_scsi_dbf_record *rec = &dbf->scsi_dbf_buf;
 	struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
 	unsigned long flags;
@@ -999,54 +997,6 @@ static void zfcp_scsi_dbf_event(const ch
 	spin_unlock_irqrestore(&dbf->scsi_dbf_lock, flags);
 }
 
-/**
- * zfcp_scsi_dbf_event_result - trace event for SCSI command completion
- * @tag: tag indicating success or failure of SCSI command
- * @level: trace level applicable for this event
- * @adapter: adapter that has been used to issue the SCSI command
- * @scsi_cmnd: SCSI command pointer
- * @fsf_req: request used to issue SCSI command (might be NULL)
- */
-void zfcp_scsi_dbf_event_result(const char *tag, int level,
-				struct zfcp_adapter *adapter,
-				struct scsi_cmnd *scsi_cmnd,
-				struct zfcp_fsf_req *fsf_req)
-{
-	zfcp_scsi_dbf_event("rslt", tag, level, adapter, scsi_cmnd, fsf_req, 0);
-}
-
-/**
- * zfcp_scsi_dbf_event_abort - trace event for SCSI command abort
- * @tag: tag indicating success or failure of abort operation
- * @adapter: adapter thas has been used to issue SCSI command to be aborted
- * @scsi_cmnd: SCSI command to be aborted
- * @new_fsf_req: request containing abort (might be NULL)
- * @old_req_id: identifier of request containg SCSI command to be aborted
- */
-void zfcp_scsi_dbf_event_abort(const char *tag, struct zfcp_adapter *adapter,
-			       struct scsi_cmnd *scsi_cmnd,
-			       struct zfcp_fsf_req *new_fsf_req,
-			       unsigned long old_req_id)
-{
-	zfcp_scsi_dbf_event("abrt", tag, 1, adapter, scsi_cmnd, new_fsf_req,
-			    old_req_id);
-}
-
-/**
- * zfcp_scsi_dbf_event_devreset - trace event for Logical Unit or Target Reset
- * @tag: tag indicating success or failure of reset operation
- * @flag: indicates type of reset (Target Reset, Logical Unit Reset)
- * @unit: unit that needs reset
- * @scsi_cmnd: SCSI command which caused this error recovery
- */
-void zfcp_scsi_dbf_event_devreset(const char *tag, u8 flag,
-				  struct zfcp_unit *unit,
-				  struct scsi_cmnd *scsi_cmnd)
-{
-	zfcp_scsi_dbf_event(flag == FCP_TARGET_RESET ? "trst" : "lrst", tag, 1,
-			    unit->port->adapter, scsi_cmnd, NULL, 0);
-}
-
 static int zfcp_scsi_dbf_view_format(debug_info_t *id, struct debug_view *view,
 				     char *out_buf, const char *in_buf)
 {
diff -urpN linux-2.6/drivers/s390/scsi/zfcp_dbf.h linux-2.6-patched/drivers/s390/scsi/zfcp_dbf.h
--- linux-2.6/drivers/s390/scsi/zfcp_dbf.h	2009-08-12 10:05:28.000000000 +0200
+++ linux-2.6-patched/drivers/s390/scsi/zfcp_dbf.h	2009-08-12 10:05:28.000000000 +0200
@@ -22,7 +22,9 @@
 #ifndef ZFCP_DBF_H
 #define ZFCP_DBF_H
 
+#include "zfcp_ext.h"
 #include "zfcp_fsf.h"
+#include "zfcp_def.h"
 
 #define ZFCP_DBF_TAG_SIZE      4
 #define ZFCP_DBF_ID_SIZE       7
@@ -237,4 +239,65 @@ struct zfcp_dbf {
 	struct zfcp_scsi_dbf_record	scsi_dbf_buf;
 };
 
+static inline
+void zfcp_scsi_dbf_event(const char *tag, const char *tag2, int level,
+			 struct zfcp_adapter *adapter, struct scsi_cmnd *scmd,
+			 struct zfcp_fsf_req *req, unsigned long old_id)
+{
+	struct zfcp_dbf *dbf = adapter->dbf;
+
+	if (level <= dbf->scsi_dbf->level)
+		_zfcp_scsi_dbf_event(tag, tag2, level, dbf, scmd, req, old_id);
+}
+
+/**
+ * zfcp_scsi_dbf_event_result - trace event for SCSI command completion
+ * @tag: tag indicating success or failure of SCSI command
+ * @level: trace level applicable for this event
+ * @adapter: adapter that has been used to issue the SCSI command
+ * @scmd: SCSI command pointer
+ * @fsf_req: request used to issue SCSI command (might be NULL)
+ */
+static inline
+void zfcp_scsi_dbf_event_result(const char *tag, int level,
+				struct zfcp_adapter *adapter,
+				struct scsi_cmnd *scmd,
+				struct zfcp_fsf_req *fsf_req)
+{
+	zfcp_scsi_dbf_event("rslt", tag, level, adapter, scmd, fsf_req, 0);
+}
+
+/**
+ * zfcp_scsi_dbf_event_abort - trace event for SCSI command abort
+ * @tag: tag indicating success or failure of abort operation
+ * @adapter: adapter thas has been used to issue SCSI command to be aborted
+ * @scmd: SCSI command to be aborted
+ * @new_req: request containing abort (might be NULL)
+ * @old_id: identifier of request containg SCSI command to be aborted
+ */
+static inline
+void zfcp_scsi_dbf_event_abort(const char *tag, struct zfcp_adapter *adapter,
+			       struct scsi_cmnd *scmd,
+			       struct zfcp_fsf_req *new_req,
+			       unsigned long old_id)
+{
+	zfcp_scsi_dbf_event("abrt", tag, 1, adapter, scmd, new_req, old_id);
+}
+
+/**
+ * zfcp_scsi_dbf_event_devreset - trace event for Logical Unit or Target Reset
+ * @tag: tag indicating success or failure of reset operation
+ * @flag: indicates type of reset (Target Reset, Logical Unit Reset)
+ * @unit: unit that needs reset
+ * @scsi_cmnd: SCSI command which caused this error recovery
+ */
+static inline
+void zfcp_scsi_dbf_event_devreset(const char *tag, u8 flag,
+				  struct zfcp_unit *unit,
+				  struct scsi_cmnd *scsi_cmnd)
+{
+	zfcp_scsi_dbf_event(flag == FCP_TARGET_RESET ? "trst" : "lrst", tag, 1,
+			    unit->port->adapter, scsi_cmnd, NULL, 0);
+}
+
 #endif /* ZFCP_DBF_H */
diff -urpN linux-2.6/drivers/s390/scsi/zfcp_ext.h linux-2.6-patched/drivers/s390/scsi/zfcp_ext.h
--- linux-2.6/drivers/s390/scsi/zfcp_ext.h	2009-08-12 10:04:57.000000000 +0200
+++ linux-2.6-patched/drivers/s390/scsi/zfcp_ext.h	2009-08-12 10:05:28.000000000 +0200
@@ -57,14 +57,9 @@ extern void zfcp_san_dbf_event_ct_respon
 extern void zfcp_san_dbf_event_els_request(struct zfcp_fsf_req *);
 extern void zfcp_san_dbf_event_els_response(struct zfcp_fsf_req *);
 extern void zfcp_san_dbf_event_incoming_els(struct zfcp_fsf_req *);
-extern void zfcp_scsi_dbf_event_result(const char *, int, struct zfcp_adapter *,
-				       struct scsi_cmnd *,
-				       struct zfcp_fsf_req *);
-extern void zfcp_scsi_dbf_event_abort(const char *, struct zfcp_adapter *,
-				      struct scsi_cmnd *, struct zfcp_fsf_req *,
-				      unsigned long);
-extern void zfcp_scsi_dbf_event_devreset(const char *, u8, struct zfcp_unit *,
-					 struct scsi_cmnd *);
+extern void _zfcp_scsi_dbf_event(const char *, const char *, int,
+				 struct zfcp_dbf *, struct scsi_cmnd *,
+				 struct zfcp_fsf_req *, unsigned long);
 
 /* zfcp_erp.c */
 extern void zfcp_erp_modify_adapter_status(struct zfcp_adapter *, char *,
diff -urpN linux-2.6/drivers/s390/scsi/zfcp_fsf.c linux-2.6-patched/drivers/s390/scsi/zfcp_fsf.c
--- linux-2.6/drivers/s390/scsi/zfcp_fsf.c	2009-08-12 10:04:57.000000000 +0200
+++ linux-2.6-patched/drivers/s390/scsi/zfcp_fsf.c	2009-08-12 10:05:28.000000000 +0200
@@ -11,6 +11,7 @@
 
 #include <linux/blktrace_api.h>
 #include "zfcp_ext.h"
+#include "zfcp_dbf.h"
 
 #define ZFCP_REQ_AUTO_CLEANUP	0x00000002
 #define ZFCP_REQ_NO_QTCB	0x00000008
diff -urpN linux-2.6/drivers/s390/scsi/zfcp_scsi.c linux-2.6-patched/drivers/s390/scsi/zfcp_scsi.c
--- linux-2.6/drivers/s390/scsi/zfcp_scsi.c	2009-08-12 10:05:27.000000000 +0200
+++ linux-2.6-patched/drivers/s390/scsi/zfcp_scsi.c	2009-08-12 10:05:28.000000000 +0200
@@ -9,8 +9,9 @@
 #define KMSG_COMPONENT "zfcp"
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 
-#include "zfcp_ext.h"
 #include <asm/atomic.h>
+#include "zfcp_ext.h"
+#include "zfcp_dbf.h"
 
 static unsigned int default_depth = 32;
 module_param_named(queue_depth, default_depth, uint, 0600);

[patch 04/27] zfcp: Only collect FSF/HBA debug data for matching trace levels

[Christof Schmitt]

[-- Attachment #1: 703-zfcp-debug-data-2.diff --]
[-- Type: text/plain, Size: 7343 bytes --]

From: Christof Schmitt <christof.schmitt@de.ibm.com>

The default trace level is to only trace failed FSF commands. Thus it
is not necessary to collect trace data for most FSF commands, since
it will be thrown away later. Restructure the FSF/HBA trace
infrastructure to first check the trace level in a inline function and
only do the expensive data collection for matching trace levels.

Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---

 drivers/s390/scsi/zfcp_dbf.c |   44 ++++++-----------------------------
 drivers/s390/scsi/zfcp_dbf.h |   53 +++++++++++++++++++++++++++++++++++++++++++
 drivers/s390/scsi/zfcp_ext.h |    9 ++++---
 3 files changed, 67 insertions(+), 39 deletions(-)

diff -urpN linux-2.6/drivers/s390/scsi/zfcp_dbf.c linux-2.6-patched/drivers/s390/scsi/zfcp_dbf.c
--- linux-2.6/drivers/s390/scsi/zfcp_dbf.c	2009-08-12 10:05:28.000000000 +0200
+++ linux-2.6-patched/drivers/s390/scsi/zfcp_dbf.c	2009-08-12 10:05:28.000000000 +0200
@@ -120,14 +120,10 @@ static int zfcp_dbf_view_header(debug_in
 	return p - out_buf;
 }
 
-/**
- * zfcp_hba_dbf_event_fsf_response - trace event for request completion
- * @fsf_req: request that has been completed
- */
-void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *fsf_req)
+void _zfcp_hba_dbf_event_fsf_response(const char *tag2, int level,
+				      struct zfcp_fsf_req *fsf_req,
+				      struct zfcp_dbf *dbf)
 {
-	struct zfcp_adapter *adapter = fsf_req->adapter;
-	struct zfcp_dbf *dbf = adapter->dbf;
 	struct fsf_qtcb *qtcb = fsf_req->qtcb;
 	union fsf_prot_status_qual *prot_status_qual =
 					&qtcb->prefix.prot_status_qual;
@@ -138,31 +134,12 @@ void zfcp_hba_dbf_event_fsf_response(str
 	struct zfcp_send_els *send_els;
 	struct zfcp_hba_dbf_record *rec = &dbf->hba_dbf_buf;
 	struct zfcp_hba_dbf_record_response *response = &rec->u.response;
-	int level;
 	unsigned long flags;
 
 	spin_lock_irqsave(&dbf->hba_dbf_lock, flags);
 	memset(rec, 0, sizeof(*rec));
 	strncpy(rec->tag, "resp", ZFCP_DBF_TAG_SIZE);
-
-	if ((qtcb->prefix.prot_status != FSF_PROT_GOOD) &&
-	    (qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) {
-		strncpy(rec->tag2, "perr", ZFCP_DBF_TAG_SIZE);
-		level = 1;
-	} else if (qtcb->header.fsf_status != FSF_GOOD) {
-		strncpy(rec->tag2, "ferr", ZFCP_DBF_TAG_SIZE);
-		level = 1;
-	} else if ((fsf_req->fsf_command == FSF_QTCB_OPEN_PORT_WITH_DID) ||
-		   (fsf_req->fsf_command == FSF_QTCB_OPEN_LUN)) {
-		strncpy(rec->tag2, "open", ZFCP_DBF_TAG_SIZE);
-		level = 4;
-	} else if (qtcb->header.log_length) {
-		strncpy(rec->tag2, "qtcb", ZFCP_DBF_TAG_SIZE);
-		level = 5;
-	} else {
-		strncpy(rec->tag2, "norm", ZFCP_DBF_TAG_SIZE);
-		level = 6;
-	}
+	strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
 
 	response->fsf_command = fsf_req->fsf_command;
 	response->fsf_reqid = fsf_req->req_id;
@@ -241,14 +218,9 @@ void zfcp_hba_dbf_event_fsf_response(str
 	spin_unlock_irqrestore(&dbf->hba_dbf_lock, flags);
 }
 
-/**
- * zfcp_hba_dbf_event_fsf_unsol - trace event for an unsolicited status buffer
- * @tag: tag indicating which kind of unsolicited status has been received
- * @adapter: adapter that has issued the unsolicited status buffer
- * @status_buffer: buffer containing payload of unsolicited status
- */
-void zfcp_hba_dbf_event_fsf_unsol(const char *tag, struct zfcp_adapter *adapter,
-				  struct fsf_status_read_buffer *status_buffer)
+void _zfcp_hba_dbf_event_fsf_unsol(const char *tag, int level,
+				   struct zfcp_adapter *adapter,
+				   struct fsf_status_read_buffer *status_buffer)
 {
 	struct zfcp_dbf *dbf = adapter->dbf;
 	struct zfcp_hba_dbf_record *rec = &dbf->hba_dbf_buf;
@@ -296,7 +268,7 @@ void zfcp_hba_dbf_event_fsf_unsol(const 
 		       &status_buffer->payload, rec->u.status.payload_size);
 	}
 
-	debug_event(dbf->hba_dbf, 2, rec, sizeof(*rec));
+	debug_event(dbf->hba_dbf, level, rec, sizeof(*rec));
 	spin_unlock_irqrestore(&dbf->hba_dbf_lock, flags);
 }
 
diff -urpN linux-2.6/drivers/s390/scsi/zfcp_dbf.h linux-2.6-patched/drivers/s390/scsi/zfcp_dbf.h
--- linux-2.6/drivers/s390/scsi/zfcp_dbf.h	2009-08-12 10:05:28.000000000 +0200
+++ linux-2.6-patched/drivers/s390/scsi/zfcp_dbf.h	2009-08-12 10:05:28.000000000 +0200
@@ -240,6 +240,59 @@ struct zfcp_dbf {
 };
 
 static inline
+void zfcp_hba_dbf_event_fsf_resp(const char *tag2, int level,
+				 struct zfcp_fsf_req *req, struct zfcp_dbf *dbf)
+{
+	if (level <= dbf->hba_dbf->level)
+		_zfcp_hba_dbf_event_fsf_response(tag2, level, req, dbf);
+}
+
+/**
+ * zfcp_hba_dbf_event_fsf_response - trace event for request completion
+ * @fsf_req: request that has been completed
+ */
+static inline void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *req)
+{
+	struct zfcp_dbf *dbf = req->adapter->dbf;
+	struct fsf_qtcb *qtcb = req->qtcb;
+
+	if ((qtcb->prefix.prot_status != FSF_PROT_GOOD) &&
+	    (qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) {
+		zfcp_hba_dbf_event_fsf_resp("perr", 1, req, dbf);
+
+	} else if (qtcb->header.fsf_status != FSF_GOOD) {
+		zfcp_hba_dbf_event_fsf_resp("ferr", 1, req, dbf);
+
+	} else if ((req->fsf_command == FSF_QTCB_OPEN_PORT_WITH_DID) ||
+		   (req->fsf_command == FSF_QTCB_OPEN_LUN)) {
+		zfcp_hba_dbf_event_fsf_resp("open", 4, req, dbf);
+
+	} else if (qtcb->header.log_length) {
+		zfcp_hba_dbf_event_fsf_resp("qtcb", 5, req, dbf);
+
+	} else {
+		zfcp_hba_dbf_event_fsf_resp("norm", 6, req, dbf);
+	}
+ }
+
+/**
+ * zfcp_hba_dbf_event_fsf_unsol - trace event for an unsolicited status buffer
+ * @tag: tag indicating which kind of unsolicited status has been received
+ * @adapter: adapter that has issued the unsolicited status buffer
+ * @status_buffer: buffer containing payload of unsolicited status
+ */
+static inline
+void zfcp_hba_dbf_event_fsf_unsol(const char *tag, struct zfcp_adapter *adapter,
+				  struct fsf_status_read_buffer *buf)
+{
+	struct zfcp_dbf *dbf = adapter->dbf;
+	int level = 2;
+
+	if (level <= dbf->hba_dbf->level)
+		_zfcp_hba_dbf_event_fsf_unsol(tag, level, adapter, buf);
+}
+
+static inline
 void zfcp_scsi_dbf_event(const char *tag, const char *tag2, int level,
 			 struct zfcp_adapter *adapter, struct scsi_cmnd *scmd,
 			 struct zfcp_fsf_req *req, unsigned long old_id)
diff -urpN linux-2.6/drivers/s390/scsi/zfcp_ext.h linux-2.6-patched/drivers/s390/scsi/zfcp_ext.h
--- linux-2.6/drivers/s390/scsi/zfcp_ext.h	2009-08-12 10:05:28.000000000 +0200
+++ linux-2.6-patched/drivers/s390/scsi/zfcp_ext.h	2009-08-12 10:05:28.000000000 +0200
@@ -45,9 +45,12 @@ extern void zfcp_rec_dbf_event_trigger(c
 				       struct zfcp_adapter *,
 				       struct zfcp_port *, struct zfcp_unit *);
 extern void zfcp_rec_dbf_event_action(char *, struct zfcp_erp_action *);
-extern void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *);
-extern void zfcp_hba_dbf_event_fsf_unsol(const char *, struct zfcp_adapter *,
-					 struct fsf_status_read_buffer *);
+extern void _zfcp_hba_dbf_event_fsf_response(const char *, int level,
+					     struct zfcp_fsf_req *,
+					     struct zfcp_dbf *dbf);
+extern void _zfcp_hba_dbf_event_fsf_unsol(const char *, int level,
+					  struct zfcp_adapter *,
+					  struct fsf_status_read_buffer *);
 extern void zfcp_hba_dbf_event_qdio(struct zfcp_adapter *, unsigned int, int,
 				    int);
 extern void zfcp_hba_dbf_event_berr(struct zfcp_adapter *,

[patch 05/27] zfcp: Remove useless assignment

[Christof Schmitt]

[-- Attachment #1: 706-zfcp--useless-assignment.diff --]
[-- Type: text/plain, Size: 812 bytes --]

From: Christof Schmitt <christof.schmitt@de.ibm.com>

Using a bitwise OR to not set anything at all is pointless so remove
the useless statement.

Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---

 drivers/s390/scsi/zfcp_fsf.c |    1 -
 1 file changed, 1 deletion(-)

diff -urpN linux-2.6/drivers/s390/scsi/zfcp_fsf.c linux-2.6-patched/drivers/s390/scsi/zfcp_fsf.c
--- linux-2.6/drivers/s390/scsi/zfcp_fsf.c	2009-08-12 10:05:28.000000000 +0200
+++ linux-2.6-patched/drivers/s390/scsi/zfcp_fsf.c	2009-08-12 10:05:30.000000000 +0200
@@ -832,7 +832,6 @@ int zfcp_fsf_status_read(struct zfcp_ada
 	}
 
 	sbale = zfcp_qdio_sbale_req(req);
-	sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
 	sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
 	req->sbale_curr = 2;
 

[patch 06/27] zfcp: Only issue one test link command per port

[Christof Schmitt]

[-- Attachment #1: 707-zfcp-one-test-link.diff --]
[-- Type: text/plain, Size: 2280 bytes --]

From: Christof Schmitt <christof.schmitt@de.ibm.com>

When the FCP channel returns a series of commands with the error
status "test link", zfcp will send a series of ELS ADISC commands.
This is technically no problem, but it is enough to only issue one
test command per remote port. So, track whether a ELS ADISC command is
already pending, and do not send a new one if there is already a
pending command.

Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---

 drivers/s390/scsi/zfcp_def.h |    1 +
 drivers/s390/scsi/zfcp_fc.c  |    9 +++++++++
 2 files changed, 10 insertions(+)

diff -urpN linux-2.6/drivers/s390/scsi/zfcp_def.h linux-2.6-patched/drivers/s390/scsi/zfcp_def.h
--- linux-2.6/drivers/s390/scsi/zfcp_def.h	2009-08-12 10:05:29.000000000 +0200
+++ linux-2.6-patched/drivers/s390/scsi/zfcp_def.h	2009-08-12 10:05:30.000000000 +0200
@@ -232,6 +232,7 @@ struct zfcp_ls_adisc {
 
 /* remote port status */
 #define ZFCP_STATUS_PORT_PHYS_OPEN		0x00000001
+#define ZFCP_STATUS_PORT_LINK_TEST		0x00000002
 
 /* well known address (WKA) port status*/
 enum zfcp_wka_status {
diff -urpN linux-2.6/drivers/s390/scsi/zfcp_fc.c linux-2.6-patched/drivers/s390/scsi/zfcp_fc.c
--- linux-2.6/drivers/s390/scsi/zfcp_fc.c	2009-08-12 10:04:57.000000000 +0200
+++ linux-2.6-patched/drivers/s390/scsi/zfcp_fc.c	2009-08-12 10:05:30.000000000 +0200
@@ -404,6 +404,7 @@ static void zfcp_fc_adisc_handler(unsign
 	/* port is good, unblock rport without going through erp */
 	zfcp_scsi_schedule_rport_register(port);
  out:
+	atomic_clear_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status);
 	zfcp_port_put(port);
 	kfree(adisc);
 }
@@ -450,13 +451,21 @@ void zfcp_fc_link_test_work(struct work_
 	port->rport_task = RPORT_DEL;
 	zfcp_scsi_rport_work(&port->rport_work);
 
+	/* only issue one test command at one time per port */
+	if (atomic_read(&port->status) & ZFCP_STATUS_PORT_LINK_TEST)
+		goto out;
+
+	atomic_set_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status);
+
 	retval = zfcp_fc_adisc(port);
 	if (retval == 0)
 		return;
 
 	/* send of ADISC was not possible */
+	atomic_clear_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status);
 	zfcp_erp_port_forced_reopen(port, 0, "fcltwk1", NULL);
 
+out:
 	zfcp_port_put(port);
 }
 

[patch 07/27] zfcp: Implicitly close all wka ports

[Christof Schmitt]

[-- Attachment #1: 708-zfcp-close-wka-ports.diff --]
[-- Type: text/plain, Size: 3444 bytes --]

From: Christof Schmitt <christof.schmitt@de.ibm.com>

An adapter shutdown implicitly closes all open ports. Make sure to
mark all WKA ports as offline, not only the directory server. Also
make sure that no pending wka port work is running when the adapter is
being removed.

Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---

 drivers/s390/scsi/zfcp_aux.c |    1 +
 drivers/s390/scsi/zfcp_erp.c |    2 +-
 drivers/s390/scsi/zfcp_ext.h |    4 +---
 drivers/s390/scsi/zfcp_fc.c  |   11 ++++++++++-
 4 files changed, 13 insertions(+), 5 deletions(-)

--- a/drivers/s390/scsi/zfcp_aux.c	2009-08-17 11:29:05.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_aux.c	2009-08-17 11:29:13.000000000 +0200
@@ -555,6 +555,7 @@ void zfcp_adapter_dequeue(struct zfcp_ad
 
 	cancel_work_sync(&adapter->scan_work);
 	cancel_work_sync(&adapter->stat_work);
+	zfcp_fc_wka_ports_force_offline(adapter->gs);
 	zfcp_adapter_scsi_unregister(adapter);
 	sysfs_remove_group(&adapter->ccw_device->dev.kobj,
 			   &zfcp_sysfs_adapter_attrs);
--- a/drivers/s390/scsi/zfcp_erp.c	2009-08-17 11:28:54.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_erp.c	2009-08-17 11:29:13.000000000 +0200
@@ -714,7 +714,7 @@ static void zfcp_erp_adapter_strategy_cl
 	zfcp_qdio_close(adapter);
 	zfcp_fsf_req_dismiss_all(adapter);
 	adapter->fsf_req_seq_no = 0;
-	zfcp_fc_wka_port_force_offline(&adapter->gs->ds);
+	zfcp_fc_wka_ports_force_offline(adapter->gs);
 	/* all ports and units are closed */
 	zfcp_erp_modify_adapter_status(adapter, "erascl1", NULL,
 				       ZFCP_STATUS_COMMON_OPEN, ZFCP_CLEAR);
--- a/drivers/s390/scsi/zfcp_ext.h	2009-08-17 11:29:09.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_ext.h	2009-08-17 11:29:13.000000000 +0200
@@ -104,12 +104,10 @@ extern int zfcp_fc_ns_gid_pn(struct zfcp
 extern void zfcp_fc_plogi_evaluate(struct zfcp_port *, struct fsf_plogi *);
 extern void zfcp_test_link(struct zfcp_port *);
 extern void zfcp_fc_link_test_work(struct work_struct *);
-extern void zfcp_fc_wka_port_force_offline(struct zfcp_wka_port *);
+extern void zfcp_fc_wka_ports_force_offline(struct zfcp_wka_ports *);
 extern void zfcp_fc_wka_ports_init(struct zfcp_adapter *);
 extern int zfcp_fc_execute_els_fc_job(struct fc_bsg_job *);
 extern int zfcp_fc_execute_ct_fc_job(struct fc_bsg_job *);
-extern void zfcp_fc_wka_port_force_offline(struct zfcp_wka_port *);
-
 
 /* zfcp_fsf.c */
 extern int zfcp_fsf_open_port(struct zfcp_erp_action *);
--- a/drivers/s390/scsi/zfcp_fc.c	2009-08-17 11:29:12.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fc.c	2009-08-17 11:29:13.000000000 +0200
@@ -132,7 +132,7 @@ static void zfcp_fc_wka_port_init(struct
 	INIT_DELAYED_WORK(&wka_port->work, zfcp_wka_port_offline);
 }
 
-void zfcp_fc_wka_port_force_offline(struct zfcp_wka_port *wka)
+static void zfcp_fc_wka_port_force_offline(struct zfcp_wka_port *wka)
 {
 	cancel_delayed_work_sync(&wka->work);
 	mutex_lock(&wka->mutex);
@@ -140,6 +140,15 @@ void zfcp_fc_wka_port_force_offline(stru
 	mutex_unlock(&wka->mutex);
 }
 
+void zfcp_fc_wka_ports_force_offline(struct zfcp_wka_ports *gs)
+{
+	zfcp_fc_wka_port_force_offline(&gs->ms);
+	zfcp_fc_wka_port_force_offline(&gs->ts);
+	zfcp_fc_wka_port_force_offline(&gs->ds);
+	zfcp_fc_wka_port_force_offline(&gs->as);
+	zfcp_fc_wka_port_force_offline(&gs->ks);
+}
+
 void zfcp_fc_wka_ports_init(struct zfcp_adapter *adapter)
 {
 	struct zfcp_wka_ports *gs = adapter->gs;

[patch 08/27] zfcp: fix layering oddities between zfcp_fsf and zfcp_qdio

[Christof Schmitt]

[-- Attachment #1: 709-zfcp-odd-layers.diff --]
[-- Type: text/plain, Size: 7907 bytes --]

From: Swen Schillig <swen@vnet.ibm.com>

There is no need for the QDIO layer to have knowledge or do things
wich are done better by the FSF layer and vice versa.  Straighten a
few things to improve vividness.

Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---

 drivers/s390/scsi/zfcp_ext.h  |    2 
 drivers/s390/scsi/zfcp_fsf.c  |  100 +++++++++++++++++++++++++++++-------------
 drivers/s390/scsi/zfcp_qdio.c |   45 ------------------
 3 files changed, 73 insertions(+), 74 deletions(-)

--- a/drivers/s390/scsi/zfcp_ext.h	2009-08-17 11:29:13.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_ext.h	2009-08-17 11:29:17.000000000 +0200
@@ -133,11 +133,11 @@ extern int zfcp_fsf_send_ct(struct zfcp_
 extern int zfcp_fsf_send_els(struct zfcp_send_els *);
 extern int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *,
 					  struct scsi_cmnd *);
-extern void zfcp_fsf_req_complete(struct zfcp_fsf_req *);
 extern void zfcp_fsf_req_free(struct zfcp_fsf_req *);
 extern struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *, u8);
 extern struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long,
 						       struct zfcp_unit *);
+extern void zfcp_fsf_reqid_check(struct zfcp_adapter *, int);
 
 /* zfcp_qdio.c */
 extern int zfcp_qdio_allocate(struct zfcp_adapter *);
--- a/drivers/s390/scsi/zfcp_fsf.c	2009-08-17 11:29:11.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fsf.c	2009-08-17 11:29:17.000000000 +0200
@@ -122,35 +122,6 @@ void zfcp_fsf_req_free(struct zfcp_fsf_r
 	}
 }
 
-/**
- * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
- * @adapter: pointer to struct zfcp_adapter
- *
- * Never ever call this without shutting down the adapter first.
- * Otherwise the adapter would continue using and corrupting s390 storage.
- * Included BUG_ON() call to ensure this is done.
- * ERP is supposed to be the only user of this function.
- */
-void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
-{
-	struct zfcp_fsf_req *req, *tmp;
-	unsigned long flags;
-	LIST_HEAD(remove_queue);
-	unsigned int i;
-
-	BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
-	spin_lock_irqsave(&adapter->req_list_lock, flags);
-	for (i = 0; i < REQUEST_LIST_SIZE; i++)
-		list_splice_init(&adapter->req_list[i], &remove_queue);
-	spin_unlock_irqrestore(&adapter->req_list_lock, flags);
-
-	list_for_each_entry_safe(req, tmp, &remove_queue, list) {
-		list_del(&req->list);
-		req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
-		zfcp_fsf_req_complete(req);
-	}
-}
-
 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
 {
 	struct fsf_status_read_buffer *sr_buf = req->data;
@@ -459,7 +430,7 @@ static void zfcp_fsf_protstatus_eval(str
  * is called to process the completion status and trigger further
  * events related to the FSF request.
  */
-void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
+static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
 {
 	if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
 		zfcp_fsf_status_read_handler(req);
@@ -492,6 +463,35 @@ void zfcp_fsf_req_complete(struct zfcp_f
 		wake_up(&req->completion_wq);
 }
 
+/**
+ * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
+ * @adapter: pointer to struct zfcp_adapter
+ *
+ * Never ever call this without shutting down the adapter first.
+ * Otherwise the adapter would continue using and corrupting s390 storage.
+ * Included BUG_ON() call to ensure this is done.
+ * ERP is supposed to be the only user of this function.
+ */
+void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
+{
+	struct zfcp_fsf_req *req, *tmp;
+	unsigned long flags;
+	LIST_HEAD(remove_queue);
+	unsigned int i;
+
+	BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
+	spin_lock_irqsave(&adapter->req_list_lock, flags);
+	for (i = 0; i < REQUEST_LIST_SIZE; i++)
+		list_splice_init(&adapter->req_list[i], &remove_queue);
+	spin_unlock_irqrestore(&adapter->req_list_lock, flags);
+
+	list_for_each_entry_safe(req, tmp, &remove_queue, list) {
+		list_del(&req->list);
+		req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
+		zfcp_fsf_req_complete(req);
+	}
+}
+
 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
 {
 	struct fsf_qtcb_bottom_config *bottom;
@@ -2578,3 +2578,43 @@ out:
 	}
 	return ERR_PTR(retval);
 }
+
+/**
+ * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
+ * @adapter: pointer to struct zfcp_adapter
+ * @sbal_idx: response queue index of SBAL to be processed
+ */
+void zfcp_fsf_reqid_check(struct zfcp_adapter *adapter, int sbal_idx)
+{
+	struct qdio_buffer *sbal = adapter->resp_q.sbal[sbal_idx];
+	struct qdio_buffer_element *sbale;
+	struct zfcp_fsf_req *fsf_req;
+	unsigned long flags, req_id;
+	int idx;
+
+	for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
+
+		sbale = &sbal->element[idx];
+		req_id = (unsigned long) sbale->addr;
+		spin_lock_irqsave(&adapter->req_list_lock, flags);
+		fsf_req = zfcp_reqlist_find(adapter, req_id);
+
+		if (!fsf_req)
+			/*
+			 * Unknown request means that we have potentially memory
+			 * corruption and must stop the machine immediately.
+			 */
+			panic("error: unknown req_id (%lx) on adapter %s.\n",
+			      req_id, dev_name(&adapter->ccw_device->dev));
+
+		list_del(&fsf_req->list);
+		spin_unlock_irqrestore(&adapter->req_list_lock, flags);
+
+		fsf_req->sbal_response = sbal_idx;
+		fsf_req->qdio_inb_usage = atomic_read(&adapter->resp_q.count);
+		zfcp_fsf_req_complete(fsf_req);
+
+		if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY))
+			break;
+	}
+}
--- a/drivers/s390/scsi/zfcp_qdio.c	2009-08-17 11:28:54.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_qdio.c	2009-08-17 11:29:17.000000000 +0200
@@ -112,31 +112,6 @@ static void zfcp_qdio_int_req(struct ccw
 	wake_up(&adapter->request_wq);
 }
 
-static void zfcp_qdio_reqid_check(struct zfcp_adapter *adapter,
-				  unsigned long req_id, int sbal_idx)
-{
-	struct zfcp_fsf_req *fsf_req;
-	unsigned long flags;
-
-	spin_lock_irqsave(&adapter->req_list_lock, flags);
-	fsf_req = zfcp_reqlist_find(adapter, req_id);
-
-	if (!fsf_req)
-		/*
-		 * Unknown request means that we have potentially memory
-		 * corruption and must stop the machine immediatly.
-		 */
-		panic("error: unknown request id (%lx) on adapter %s.\n",
-		      req_id, dev_name(&adapter->ccw_device->dev));
-
-	zfcp_reqlist_remove(adapter, fsf_req);
-	spin_unlock_irqrestore(&adapter->req_list_lock, flags);
-
-	fsf_req->sbal_response = sbal_idx;
-	fsf_req->qdio_inb_usage = atomic_read(&adapter->resp_q.count);
-	zfcp_fsf_req_complete(fsf_req);
-}
-
 static void zfcp_qdio_resp_put_back(struct zfcp_adapter *adapter, int processed)
 {
 	struct zfcp_qdio_queue *queue = &adapter->resp_q;
@@ -163,9 +138,7 @@ static void zfcp_qdio_int_resp(struct cc
 			       unsigned long parm)
 {
 	struct zfcp_adapter *adapter = (struct zfcp_adapter *) parm;
-	struct zfcp_qdio_queue *queue = &adapter->resp_q;
-	struct qdio_buffer_element *sbale;
-	int sbal_idx, sbale_idx, sbal_no;
+	int sbal_idx, sbal_no;
 
 	if (unlikely(qdio_err)) {
 		zfcp_hba_dbf_event_qdio(adapter, qdio_err, first, count);
@@ -179,22 +152,8 @@ static void zfcp_qdio_int_resp(struct cc
 	 */
 	for (sbal_no = 0; sbal_no < count; sbal_no++) {
 		sbal_idx = (first + sbal_no) % QDIO_MAX_BUFFERS_PER_Q;
-
 		/* go through all SBALEs of SBAL */
-		for (sbale_idx = 0; sbale_idx < QDIO_MAX_ELEMENTS_PER_BUFFER;
-		     sbale_idx++) {
-			sbale = zfcp_qdio_sbale(queue, sbal_idx, sbale_idx);
-			zfcp_qdio_reqid_check(adapter,
-					      (unsigned long) sbale->addr,
-					      sbal_idx);
-			if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY))
-				break;
-		};
-
-		if (unlikely(!(sbale->flags & SBAL_FLAGS_LAST_ENTRY)))
-			dev_warn(&adapter->ccw_device->dev,
-				 "A QDIO protocol error occurred, "
-				 "operations continue\n");
+		zfcp_fsf_reqid_check(adapter, sbal_idx);
 	}
 
 	/*

[patch 09/27] zfcp: Replace fsf_req wait_queue with completion

[Christof Schmitt]

[-- Attachment #1: 710-zfcp-fsfreq-complete.diff --]
[-- Type: text/plain, Size: 5526 bytes --]

From: Swen Schillig <swen@vnet.ibm.com>

The combination wait_queue/wakeup in conjunction with the flag
ZFCP_STATUS_FSFREQ_COMPLETED to signal the completion of an fsfreq
was not race-safe and can be better solved by a completion.

Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---

 drivers/s390/scsi/zfcp_def.h  |    3 +--
 drivers/s390/scsi/zfcp_erp.c  |    3 +--
 drivers/s390/scsi/zfcp_fsf.c  |   26 ++++++--------------------
 drivers/s390/scsi/zfcp_scsi.c |    6 ++----
 4 files changed, 10 insertions(+), 28 deletions(-)

diff -urpN linux-2.6/drivers/s390/scsi/zfcp_def.h linux-2.6-patched/drivers/s390/scsi/zfcp_def.h
--- linux-2.6/drivers/s390/scsi/zfcp_def.h	2009-08-12 10:05:31.000000000 +0200
+++ linux-2.6-patched/drivers/s390/scsi/zfcp_def.h	2009-08-12 10:05:31.000000000 +0200
@@ -248,7 +248,6 @@ enum zfcp_wka_status {
 
 /* FSF request status (this does not have a common part) */
 #define ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT	0x00000002
-#define ZFCP_STATUS_FSFREQ_COMPLETED		0x00000004
 #define ZFCP_STATUS_FSFREQ_ERROR		0x00000008
 #define ZFCP_STATUS_FSFREQ_CLEANUP		0x00000010
 #define ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED	0x00000040
@@ -532,7 +531,7 @@ struct zfcp_fsf_req {
 	u8		       sbale_curr;     /* current SBALE during creation
 						  of request */
 	u8			sbal_response;	/* SBAL used in interrupt */
-	wait_queue_head_t      completion_wq;  /* can be used by a routine
+	struct completion	completion;	/* can be used by a routine
 						  to wait for completion */
 	u32			status;	       /* status of this request */
 	u32		       fsf_command;    /* FSF Command copy */
diff -urpN linux-2.6/drivers/s390/scsi/zfcp_erp.c linux-2.6-patched/drivers/s390/scsi/zfcp_erp.c
--- linux-2.6/drivers/s390/scsi/zfcp_erp.c	2009-08-12 10:05:31.000000000 +0200
+++ linux-2.6-patched/drivers/s390/scsi/zfcp_erp.c	2009-08-12 10:05:31.000000000 +0200
@@ -485,8 +485,7 @@ static void zfcp_erp_strategy_check_fsfr
 		}
 		if (act->status & ZFCP_STATUS_ERP_TIMEDOUT)
 			zfcp_rec_dbf_event_action("erscf_2", act);
-		if (act->fsf_req->status & (ZFCP_STATUS_FSFREQ_COMPLETED |
-					    ZFCP_STATUS_FSFREQ_DISMISSED))
+		if (act->fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED)
 			act->fsf_req = NULL;
 	} else
 		act->fsf_req = NULL;
diff -urpN linux-2.6/drivers/s390/scsi/zfcp_fsf.c linux-2.6-patched/drivers/s390/scsi/zfcp_fsf.c
--- linux-2.6/drivers/s390/scsi/zfcp_fsf.c	2009-08-12 10:05:31.000000000 +0200
+++ linux-2.6-patched/drivers/s390/scsi/zfcp_fsf.c	2009-08-12 10:05:31.000000000 +0200
@@ -444,23 +444,11 @@ static void zfcp_fsf_req_complete(struct
 
 	if (req->erp_action)
 		zfcp_erp_notify(req->erp_action, 0);
-	req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
 
 	if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
 		zfcp_fsf_req_free(req);
 	else
-	/* notify initiator waiting for the requests completion */
-	/*
-	 * FIXME: Race! We must not access fsf_req here as it might have been
-	 * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED
-	 * flag. It's an improbable case. But, we have the same paranoia for
-	 * the cleanup flag already.
-	 * Might better be handled using complete()?
-	 * (setting the flag and doing wakeup ought to be atomic
-	 *  with regard to checking the flag as long as waitqueue is
-	 *  part of the to be released structure)
-	 */
-		wake_up(&req->completion_wq);
+		complete(&req->completion);
 }
 
 /**
@@ -733,7 +721,7 @@ static struct zfcp_fsf_req *zfcp_fsf_req
 
 	INIT_LIST_HEAD(&req->list);
 	init_timer(&req->timer);
-	init_waitqueue_head(&req->completion_wq);
+	init_completion(&req->completion);
 
 	req->adapter = adapter;
 	req->fsf_command = fsf_cmd;
@@ -1309,8 +1297,7 @@ int zfcp_fsf_exchange_config_data_sync(s
 	retval = zfcp_fsf_req_send(req);
 	spin_unlock_bh(&adapter->req_q_lock);
 	if (!retval)
-		wait_event(req->completion_wq,
-			   req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
+		wait_for_completion(&req->completion);
 
 	zfcp_fsf_req_free(req);
 	return retval;
@@ -1405,8 +1392,8 @@ int zfcp_fsf_exchange_port_data_sync(str
 	spin_unlock_bh(&adapter->req_q_lock);
 
 	if (!retval)
-		wait_event(req->completion_wq,
-			   req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
+		wait_for_completion(&req->completion);
+
 	zfcp_fsf_req_free(req);
 
 	return retval;
@@ -2572,8 +2559,7 @@ out:
 	spin_unlock_bh(&adapter->req_q_lock);
 
 	if (!retval) {
-		wait_event(req->completion_wq,
-			   req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
+		wait_for_completion(&req->completion);
 		return req;
 	}
 	return ERR_PTR(retval);
diff -urpN linux-2.6/drivers/s390/scsi/zfcp_scsi.c linux-2.6-patched/drivers/s390/scsi/zfcp_scsi.c
--- linux-2.6/drivers/s390/scsi/zfcp_scsi.c	2009-08-12 10:05:28.000000000 +0200
+++ linux-2.6-patched/drivers/s390/scsi/zfcp_scsi.c	2009-08-12 10:05:31.000000000 +0200
@@ -206,8 +206,7 @@ static int zfcp_scsi_eh_abort_handler(st
 	if (!abrt_req)
 		return FAILED;
 
-	wait_event(abrt_req->completion_wq,
-		   abrt_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
+	wait_for_completion(&abrt_req->completion);
 
 	if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED)
 		dbf_tag = "okay";
@@ -246,8 +245,7 @@ static int zfcp_task_mgmt_function(struc
 	if (!fsf_req)
 		return FAILED;
 
-	wait_event(fsf_req->completion_wq,
-		   fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
+	wait_for_completion(&fsf_req->completion);
 
 	if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) {
 		zfcp_scsi_dbf_event_devreset("fail", tm_flags, unit, scpnt);

[patch 10/27] zfcp: Improve request allocation through mempools

[Christof Schmitt]

[-- Attachment #1: 711-zfcp-special-case.diff --]
[-- Type: text/plain, Size: 17822 bytes --]

From: Swen Schillig <swen@vnet.ibm.com>

Remove the special case for NO_QTCB requests and optimize the
mempool and cache processing for fsfreqs. Especially use seperate
mempools for the zfcp_fsf_req and zfcp_qtcb structs.

Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---

 drivers/s390/scsi/zfcp_aux.c |   98 ++++++++++++++++++++++++-------------------
 drivers/s390/scsi/zfcp_def.h |   31 +++++++------
 drivers/s390/scsi/zfcp_fc.c  |   19 ++------
 drivers/s390/scsi/zfcp_fsf.c |   92 +++++++++++++++++++++-------------------
 4 files changed, 127 insertions(+), 113 deletions(-)

--- a/drivers/s390/scsi/zfcp_aux.c	2009-08-17 11:29:13.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_aux.c	2009-08-17 11:29:21.000000000 +0200
@@ -42,6 +42,12 @@ static char *init_device;
 module_param_named(device, init_device, charp, 0400);
 MODULE_PARM_DESC(device, "specify initial device");
 
+static struct kmem_cache *zfcp_cache_hw_align(const char *name,
+					      unsigned long size)
+{
+	return kmem_cache_create(name, size, roundup_pow_of_two(size), 0, NULL);
+}
+
 static int zfcp_reqlist_alloc(struct zfcp_adapter *adapter)
 {
 	int idx;
@@ -110,14 +116,6 @@ out_adapter:
 	return;
 }
 
-static struct kmem_cache *zfcp_cache_create(int size, char *name)
-{
-	int align = 1;
-	while ((size - align) > 0)
-		align <<= 1;
-	return kmem_cache_create(name , size, align, 0, NULL);
-}
-
 static void __init zfcp_init_device_setup(char *devstr)
 {
 	char *token;
@@ -158,18 +156,23 @@ static int __init zfcp_module_init(void)
 {
 	int retval = -ENOMEM;
 
-	zfcp_data.fsf_req_qtcb_cache = zfcp_cache_create(
-			sizeof(struct zfcp_fsf_req_qtcb), "zfcp_fsf");
-	if (!zfcp_data.fsf_req_qtcb_cache)
+	zfcp_data.gpn_ft_cache = zfcp_cache_hw_align("zfcp_gpn",
+					sizeof(struct ct_iu_gpn_ft_req));
+	if (!zfcp_data.gpn_ft_cache)
 		goto out;
 
-	zfcp_data.sr_buffer_cache = zfcp_cache_create(
-			sizeof(struct fsf_status_read_buffer), "zfcp_sr");
+	zfcp_data.qtcb_cache = zfcp_cache_hw_align("zfcp_qtcb",
+					sizeof(struct fsf_qtcb));
+	if (!zfcp_data.qtcb_cache)
+		goto out_qtcb_cache;
+
+	zfcp_data.sr_buffer_cache = zfcp_cache_hw_align("zfcp_sr",
+					sizeof(struct fsf_status_read_buffer));
 	if (!zfcp_data.sr_buffer_cache)
 		goto out_sr_cache;
 
-	zfcp_data.gid_pn_cache = zfcp_cache_create(
-			sizeof(struct zfcp_gid_pn_data), "zfcp_gid");
+	zfcp_data.gid_pn_cache = zfcp_cache_hw_align("zfcp_gid",
+					sizeof(struct zfcp_gid_pn_data));
 	if (!zfcp_data.gid_pn_cache)
 		goto out_gid_cache;
 
@@ -209,7 +212,9 @@ out_transport:
 out_gid_cache:
 	kmem_cache_destroy(zfcp_data.sr_buffer_cache);
 out_sr_cache:
-	kmem_cache_destroy(zfcp_data.fsf_req_qtcb_cache);
+	kmem_cache_destroy(zfcp_data.qtcb_cache);
+out_qtcb_cache:
+	kmem_cache_destroy(zfcp_data.gpn_ft_cache);
 out:
 	return retval;
 }
@@ -354,36 +359,41 @@ void zfcp_unit_dequeue(struct zfcp_unit 
 static int zfcp_allocate_low_mem_buffers(struct zfcp_adapter *adapter)
 {
 	/* must only be called with zfcp_data.config_sema taken */
-	adapter->pool.fsf_req_erp =
-		mempool_create_slab_pool(1, zfcp_data.fsf_req_qtcb_cache);
-	if (!adapter->pool.fsf_req_erp)
+	adapter->pool.erp_req =
+		mempool_create_kmalloc_pool(1, sizeof(struct zfcp_fsf_req));
+	if (!adapter->pool.erp_req)
 		return -ENOMEM;
 
-	adapter->pool.fsf_req_scsi =
-		mempool_create_slab_pool(1, zfcp_data.fsf_req_qtcb_cache);
-	if (!adapter->pool.fsf_req_scsi)
+	adapter->pool.scsi_req =
+		mempool_create_kmalloc_pool(1, sizeof(struct zfcp_fsf_req));
+	if (!adapter->pool.scsi_req)
 		return -ENOMEM;
 
-	adapter->pool.fsf_req_abort =
-		mempool_create_slab_pool(1, zfcp_data.fsf_req_qtcb_cache);
-	if (!adapter->pool.fsf_req_abort)
+	adapter->pool.scsi_abort =
+		mempool_create_kmalloc_pool(1, sizeof(struct zfcp_fsf_req));
+	if (!adapter->pool.scsi_abort)
 		return -ENOMEM;
 
-	adapter->pool.fsf_req_status_read =
+	adapter->pool.status_read_req =
 		mempool_create_kmalloc_pool(FSF_STATUS_READS_RECOM,
 					    sizeof(struct zfcp_fsf_req));
-	if (!adapter->pool.fsf_req_status_read)
+	if (!adapter->pool.status_read_req)
+		return -ENOMEM;
+
+	adapter->pool.qtcb_pool =
+		mempool_create_slab_pool(3, zfcp_data.qtcb_cache);
+	if (!adapter->pool.qtcb_pool)
 		return -ENOMEM;
 
-	adapter->pool.data_status_read =
+	adapter->pool.status_read_data =
 		mempool_create_slab_pool(FSF_STATUS_READS_RECOM,
 					 zfcp_data.sr_buffer_cache);
-	if (!adapter->pool.data_status_read)
+	if (!adapter->pool.status_read_data)
 		return -ENOMEM;
 
-	adapter->pool.data_gid_pn =
+	adapter->pool.gid_pn_data =
 		mempool_create_slab_pool(1, zfcp_data.gid_pn_cache);
-	if (!adapter->pool.data_gid_pn)
+	if (!adapter->pool.gid_pn_data)
 		return -ENOMEM;
 
 	return 0;
@@ -392,18 +402,20 @@ static int zfcp_allocate_low_mem_buffers
 static void zfcp_free_low_mem_buffers(struct zfcp_adapter *adapter)
 {
 	/* zfcp_data.config_sema must be held */
-	if (adapter->pool.fsf_req_erp)
-		mempool_destroy(adapter->pool.fsf_req_erp);
-	if (adapter->pool.fsf_req_scsi)
-		mempool_destroy(adapter->pool.fsf_req_scsi);
-	if (adapter->pool.fsf_req_abort)
-		mempool_destroy(adapter->pool.fsf_req_abort);
-	if (adapter->pool.fsf_req_status_read)
-		mempool_destroy(adapter->pool.fsf_req_status_read);
-	if (adapter->pool.data_status_read)
-		mempool_destroy(adapter->pool.data_status_read);
-	if (adapter->pool.data_gid_pn)
-		mempool_destroy(adapter->pool.data_gid_pn);
+	if (adapter->pool.erp_req)
+		mempool_destroy(adapter->pool.erp_req);
+	if (adapter->pool.scsi_req)
+		mempool_destroy(adapter->pool.scsi_req);
+	if (adapter->pool.scsi_abort)
+		mempool_destroy(adapter->pool.scsi_abort);
+	if (adapter->pool.qtcb_pool)
+		mempool_destroy(adapter->pool.qtcb_pool);
+	if (adapter->pool.status_read_req)
+		mempool_destroy(adapter->pool.status_read_req);
+	if (adapter->pool.status_read_data)
+		mempool_destroy(adapter->pool.status_read_data);
+	if (adapter->pool.gid_pn_data)
+		mempool_destroy(adapter->pool.gid_pn_data);
 }
 
 /**
--- a/drivers/s390/scsi/zfcp_def.h	2009-08-17 11:29:20.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_def.h	2009-08-17 11:29:21.000000000 +0200
@@ -264,12 +264,13 @@ struct zfcp_fsf_req;
 
 /* holds various memory pools of an adapter */
 struct zfcp_adapter_mempool {
-	mempool_t *fsf_req_erp;
-	mempool_t *fsf_req_scsi;
-	mempool_t *fsf_req_abort;
-	mempool_t *fsf_req_status_read;
-	mempool_t *data_status_read;
-	mempool_t *data_gid_pn;
+	mempool_t *erp_req;
+	mempool_t *scsi_req;
+	mempool_t *scsi_abort;
+	mempool_t *status_read_req;
+	mempool_t *status_read_data;
+	mempool_t *gid_pn_data;
+	mempool_t *qtcb_pool;
 };
 
 /*
@@ -303,6 +304,15 @@ struct ct_iu_gid_pn_resp {
 	u32 d_id;
 } __attribute__ ((packed));
 
+struct ct_iu_gpn_ft_req {
+	struct ct_hdr header;
+	u8 flags;
+	u8 domain_id_scope;
+	u8 area_id_scope;
+	u8 fc4_type;
+} __attribute__ ((packed));
+
+
 /**
  * struct zfcp_send_ct - used to pass parameters to function zfcp_fsf_send_ct
  * @wka_port: port where the request is sent to
@@ -559,18 +569,13 @@ struct zfcp_data {
 						       lists */
 	struct semaphore        config_sema;        /* serialises configuration
 						       changes */
-	struct kmem_cache	*fsf_req_qtcb_cache;
+	struct kmem_cache	*gpn_ft_cache;
+	struct kmem_cache	*qtcb_cache;
 	struct kmem_cache	*sr_buffer_cache;
 	struct kmem_cache	*gid_pn_cache;
 	struct workqueue_struct	*work_queue;
 };
 
-/* struct used by memory pools for fsf_requests */
-struct zfcp_fsf_req_qtcb {
-	struct zfcp_fsf_req fsf_req;
-	struct fsf_qtcb qtcb;
-};
-
 /********************** ZFCP SPECIFIC DEFINES ********************************/
 
 #define ZFCP_SET                0x00000100
--- a/drivers/s390/scsi/zfcp_fc.c	2009-08-17 11:29:13.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fc.c	2009-08-17 11:29:21.000000000 +0200
@@ -25,14 +25,6 @@ static u32 rscn_range_mask[] = {
 	[RSCN_FABRIC_ADDRESS]		= 0x000000,
 };
 
-struct ct_iu_gpn_ft_req {
-	struct ct_hdr header;
-	u8 flags;
-	u8 domain_id_scope;
-	u8 area_id_scope;
-	u8 fc4_type;
-} __attribute__ ((packed));
-
 struct gpn_ft_resp_acc {
 	u8 control;
 	u8 port_id[3];
@@ -322,8 +314,7 @@ int static zfcp_fc_ns_gid_pn_request(str
 	init_completion(&compl_rec.done);
 	compl_rec.handler = zfcp_fc_ns_gid_pn_eval;
 	compl_rec.handler_data = (unsigned long) gid_pn;
-	ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.fsf_req_erp,
-			       erp_action);
+	ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.erp_req, erp_action);
 	if (!ret)
 		wait_for_completion(&compl_rec.done);
 	return ret;
@@ -340,7 +331,7 @@ int zfcp_fc_ns_gid_pn(struct zfcp_erp_ac
 	struct zfcp_gid_pn_data *gid_pn;
 	struct zfcp_adapter *adapter = erp_action->adapter;
 
-	gid_pn = mempool_alloc(adapter->pool.data_gid_pn, GFP_ATOMIC);
+	gid_pn = mempool_alloc(adapter->pool.gid_pn_data, GFP_ATOMIC);
 	if (!gid_pn)
 		return -ENOMEM;
 
@@ -354,7 +345,7 @@ int zfcp_fc_ns_gid_pn(struct zfcp_erp_ac
 
 	zfcp_wka_port_put(&adapter->gs->ds);
 out:
-	mempool_free(gid_pn, adapter->pool.data_gid_pn);
+	mempool_free(gid_pn, adapter->pool.gid_pn_data);
 	return ret;
 }
 
@@ -497,7 +488,7 @@ static void zfcp_free_sg_env(struct zfcp
 {
 	struct scatterlist *sg = &gpn_ft->sg_req;
 
-	kfree(sg_virt(sg)); /* free request buffer */
+	kmem_cache_free(zfcp_data.gpn_ft_cache, sg_virt(sg));
 	zfcp_sg_free_table(gpn_ft->sg_resp, buf_num);
 
 	kfree(gpn_ft);
@@ -512,7 +503,7 @@ static struct zfcp_gpn_ft *zfcp_alloc_sg
 	if (!gpn_ft)
 		return NULL;
 
-	req = kzalloc(sizeof(struct ct_iu_gpn_ft_req), GFP_KERNEL);
+	req = kmem_cache_alloc(zfcp_data.gpn_ft_cache, GFP_KERNEL);
 	if (!req) {
 		kfree(gpn_ft);
 		gpn_ft = NULL;
--- a/drivers/s390/scsi/zfcp_fsf.c	2009-08-17 11:29:20.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fsf.c	2009-08-17 11:29:21.000000000 +0200
@@ -14,7 +14,6 @@
 #include "zfcp_dbf.h"
 
 #define ZFCP_REQ_AUTO_CLEANUP	0x00000002
-#define ZFCP_REQ_NO_QTCB	0x00000008
 
 static void zfcp_fsf_request_timeout_handler(unsigned long data)
 {
@@ -112,14 +111,15 @@ static void zfcp_fsf_class_not_supp(stru
 void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
 {
 	if (likely(req->pool)) {
+		if (likely(req->qtcb))
+			mempool_free(req->qtcb, req->adapter->pool.qtcb_pool);
 		mempool_free(req, req->pool);
 		return;
 	}
 
-	if (req->qtcb) {
-		kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, req);
-		return;
-	}
+	if (likely(req->qtcb))
+		kmem_cache_free(zfcp_data.qtcb_cache, req->qtcb);
+	kfree(req);
 }
 
 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
@@ -251,7 +251,7 @@ static void zfcp_fsf_status_read_handler
 
 	if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 		zfcp_hba_dbf_event_fsf_unsol("dism", adapter, sr_buf);
-		mempool_free(sr_buf, adapter->pool.data_status_read);
+		mempool_free(sr_buf, adapter->pool.status_read_data);
 		zfcp_fsf_req_free(req);
 		return;
 	}
@@ -303,7 +303,7 @@ static void zfcp_fsf_status_read_handler
 		break;
 	}
 
-	mempool_free(sr_buf, adapter->pool.data_status_read);
+	mempool_free(sr_buf, adapter->pool.status_read_data);
 	zfcp_fsf_req_free(req);
 
 	atomic_inc(&adapter->stat_miss);
@@ -669,34 +669,37 @@ static int zfcp_fsf_req_sbal_get(struct 
 	return -EIO;
 }
 
-static struct zfcp_fsf_req *zfcp_fsf_alloc_noqtcb(mempool_t *pool)
+static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
 {
 	struct zfcp_fsf_req *req;
-	req = mempool_alloc(pool, GFP_ATOMIC);
-	if (!req)
+
+	if (likely(pool))
+		req = mempool_alloc(pool, GFP_ATOMIC);
+	else
+		req = kmalloc(sizeof(*req), GFP_ATOMIC);
+
+	if (unlikely(!req))
 		return NULL;
+
 	memset(req, 0, sizeof(*req));
 	req->pool = pool;
 	return req;
 }
 
-static struct zfcp_fsf_req *zfcp_fsf_alloc_qtcb(mempool_t *pool)
+static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
 {
-	struct zfcp_fsf_req_qtcb *qtcb;
+	struct fsf_qtcb *qtcb;
 
 	if (likely(pool))
 		qtcb = mempool_alloc(pool, GFP_ATOMIC);
 	else
-		qtcb = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache,
-					GFP_ATOMIC);
+		qtcb = kmem_cache_alloc(zfcp_data.qtcb_cache, GFP_ATOMIC);
+
 	if (unlikely(!qtcb))
 		return NULL;
 
 	memset(qtcb, 0, sizeof(*qtcb));
-	qtcb->fsf_req.qtcb = &qtcb->qtcb;
-	qtcb->fsf_req.pool = pool;
-
-	return &qtcb->fsf_req;
+	return qtcb;
 }
 
 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_adapter *adapter,
@@ -704,14 +707,8 @@ static struct zfcp_fsf_req *zfcp_fsf_req
 						mempool_t *pool)
 {
 	struct qdio_buffer_element *sbale;
-
-	struct zfcp_fsf_req *req;
 	struct zfcp_qdio_queue *req_q = &adapter->req_q;
-
-	if (req_flags & ZFCP_REQ_NO_QTCB)
-		req = zfcp_fsf_alloc_noqtcb(pool);
-	else
-		req = zfcp_fsf_alloc_qtcb(pool);
+	struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
 
 	if (unlikely(!req))
 		return ERR_PTR(-ENOMEM);
@@ -735,7 +732,17 @@ static struct zfcp_fsf_req *zfcp_fsf_req
 	sbale[0].addr = (void *) req->req_id;
 	sbale[0].flags |= SBAL_FLAGS0_COMMAND;
 
-	if (likely(req->qtcb)) {
+	if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
+		if (likely(pool))
+			req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
+		else
+			req->qtcb = zfcp_qtcb_alloc(NULL);
+
+		if (unlikely(!req->qtcb)) {
+			zfcp_fsf_req_free(req);
+			return ERR_PTR(-ENOMEM);
+		}
+
 		req->qtcb->prefix.req_seq_no = req->adapter->fsf_req_seq_no;
 		req->qtcb->prefix.req_id = req->req_id;
 		req->qtcb->prefix.ulp_info = 26;
@@ -811,9 +818,8 @@ int zfcp_fsf_status_read(struct zfcp_ada
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
 
-	req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
-				  ZFCP_REQ_NO_QTCB,
-				  adapter->pool.fsf_req_status_read);
+	req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS, 0,
+				  adapter->pool.status_read_req);
 	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
@@ -823,7 +829,7 @@ int zfcp_fsf_status_read(struct zfcp_ada
 	sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
 	req->sbale_curr = 2;
 
-	sr_buf = mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
+	sr_buf = mempool_alloc(adapter->pool.status_read_data, GFP_ATOMIC);
 	if (!sr_buf) {
 		retval = -ENOMEM;
 		goto failed_buf;
@@ -841,7 +847,7 @@ int zfcp_fsf_status_read(struct zfcp_ada
 	goto out;
 
 failed_req_send:
-	mempool_free(sr_buf, adapter->pool.data_status_read);
+	mempool_free(sr_buf, adapter->pool.status_read_data);
 failed_buf:
 	zfcp_fsf_req_free(req);
 	zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
@@ -919,7 +925,7 @@ struct zfcp_fsf_req *zfcp_fsf_abort_fcp_
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
-				  0, adapter->pool.fsf_req_abort);
+				  0, adapter->pool.scsi_abort);
 	if (IS_ERR(req)) {
 		req = NULL;
 		goto out;
@@ -1231,7 +1237,7 @@ int zfcp_fsf_exchange_config_data(struct
 	req = zfcp_fsf_req_create(adapter,
 				  FSF_QTCB_EXCHANGE_CONFIG_DATA,
 				  ZFCP_REQ_AUTO_CLEANUP,
-				  adapter->pool.fsf_req_erp);
+				  adapter->pool.erp_req);
 	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
@@ -1327,7 +1333,7 @@ int zfcp_fsf_exchange_port_data(struct z
 		goto out;
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
 				  ZFCP_REQ_AUTO_CLEANUP,
-				  adapter->pool.fsf_req_erp);
+				  adapter->pool.erp_req);
 	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
@@ -1497,7 +1503,7 @@ int zfcp_fsf_open_port(struct zfcp_erp_a
 	req = zfcp_fsf_req_create(adapter,
 				  FSF_QTCB_OPEN_PORT_WITH_DID,
 				  ZFCP_REQ_AUTO_CLEANUP,
-				  adapter->pool.fsf_req_erp);
+				  adapter->pool.erp_req);
 	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
@@ -1566,7 +1572,7 @@ int zfcp_fsf_close_port(struct zfcp_erp_
 
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
 				  ZFCP_REQ_AUTO_CLEANUP,
-				  adapter->pool.fsf_req_erp);
+				  adapter->pool.erp_req);
 	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
@@ -1643,7 +1649,7 @@ int zfcp_fsf_open_wka_port(struct zfcp_w
 	req = zfcp_fsf_req_create(adapter,
 				  FSF_QTCB_OPEN_PORT_WITH_DID,
 				  ZFCP_REQ_AUTO_CLEANUP,
-				  adapter->pool.fsf_req_erp);
+				  adapter->pool.erp_req);
 	if (unlikely(IS_ERR(req))) {
 		retval = PTR_ERR(req);
 		goto out;
@@ -1697,7 +1703,7 @@ int zfcp_fsf_close_wka_port(struct zfcp_
 
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
 				  ZFCP_REQ_AUTO_CLEANUP,
-				  adapter->pool.fsf_req_erp);
+				  adapter->pool.erp_req);
 	if (unlikely(IS_ERR(req))) {
 		retval = PTR_ERR(req);
 		goto out;
@@ -1788,7 +1794,7 @@ int zfcp_fsf_close_physical_port(struct 
 
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT,
 				  ZFCP_REQ_AUTO_CLEANUP,
-				  adapter->pool.fsf_req_erp);
+				  adapter->pool.erp_req);
 	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
@@ -1960,7 +1966,7 @@ int zfcp_fsf_open_unit(struct zfcp_erp_a
 
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN,
 				  ZFCP_REQ_AUTO_CLEANUP,
-				  adapter->pool.fsf_req_erp);
+				  adapter->pool.erp_req);
 	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
@@ -2045,7 +2051,7 @@ int zfcp_fsf_close_unit(struct zfcp_erp_
 		goto out;
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
 				  ZFCP_REQ_AUTO_CLEANUP,
-				  adapter->pool.fsf_req_erp);
+				  adapter->pool.erp_req);
 	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
@@ -2349,7 +2355,7 @@ int zfcp_fsf_send_fcp_command_task(struc
 	}
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND,
 				  ZFCP_REQ_AUTO_CLEANUP,
-				  adapter->pool.fsf_req_scsi);
+				  adapter->pool.scsi_req);
 	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
@@ -2460,7 +2466,7 @@ struct zfcp_fsf_req *zfcp_fsf_send_fcp_c
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, 0,
-				  adapter->pool.fsf_req_scsi);
+				  adapter->pool.scsi_req);
 	if (IS_ERR(req)) {
 		req = NULL;
 		goto out;

[patch 11/27] zfcp: Remove the useless ZFCP_REQ_AUTO_CLEANUP flag

[Christof Schmitt]

[-- Attachment #1: 712-zfcp-useless-flag.diff --]
[-- Type: text/plain, Size: 9378 bytes --]

From: Swen Schillig <swen@vnet.ibm.com>

The flag ZFCP_REQ_AUTO_CLEANUP was useless as the
ZFCP_STATUS_FSFREQ_CLEANUP flag is there for exactly the same purpose.

Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---

 drivers/s390/scsi/zfcp_fsf.c |   80 ++++++++++++++++++++++++-------------------
 1 file changed, 45 insertions(+), 35 deletions(-)

diff -urpN linux-2.6/drivers/s390/scsi/zfcp_fsf.c linux-2.6-patched/drivers/s390/scsi/zfcp_fsf.c
--- linux-2.6/drivers/s390/scsi/zfcp_fsf.c	2009-08-12 10:05:32.000000000 +0200
+++ linux-2.6-patched/drivers/s390/scsi/zfcp_fsf.c	2009-08-12 10:05:32.000000000 +0200
@@ -13,8 +13,6 @@
 #include "zfcp_ext.h"
 #include "zfcp_dbf.h"
 
-#define ZFCP_REQ_AUTO_CLEANUP	0x00000002
-
 static void zfcp_fsf_request_timeout_handler(unsigned long data)
 {
 	struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
@@ -703,8 +701,7 @@ static struct fsf_qtcb *zfcp_qtcb_alloc(
 }
 
 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_adapter *adapter,
-						u32 fsf_cmd, int req_flags,
-						mempool_t *pool)
+						u32 fsf_cmd, mempool_t *pool)
 {
 	struct qdio_buffer_element *sbale;
 	struct zfcp_qdio_queue *req_q = &adapter->req_q;
@@ -761,9 +758,6 @@ static struct zfcp_fsf_req *zfcp_fsf_req
 		return ERR_PTR(-EIO);
 	}
 
-	if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP))
-		req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
-
 	return req;
 }
 
@@ -818,7 +812,7 @@ int zfcp_fsf_status_read(struct zfcp_ada
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
 
-	req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS, 0,
+	req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
 				  adapter->pool.status_read_req);
 	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
@@ -925,7 +919,7 @@ struct zfcp_fsf_req *zfcp_fsf_abort_fcp_
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
-				  0, adapter->pool.scsi_abort);
+				  adapter->pool.scsi_abort);
 	if (IS_ERR(req)) {
 		req = NULL;
 		goto out;
@@ -1081,13 +1075,14 @@ int zfcp_fsf_send_ct(struct zfcp_send_ct
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
 
-	req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
-				  ZFCP_REQ_AUTO_CLEANUP, pool);
+	req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC, pool);
+
 	if (IS_ERR(req)) {
 		ret = PTR_ERR(req);
 		goto out;
 	}
 
+	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
 	ret = zfcp_fsf_setup_ct_els_sbals(req, ct->req, ct->resp,
 					  FSF_MAX_SBALS_PER_REQ);
 	if (ret)
@@ -1189,13 +1184,15 @@ int zfcp_fsf_send_els(struct zfcp_send_e
 	spin_lock_bh(&adapter->req_q_lock);
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
-	req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
-				  ZFCP_REQ_AUTO_CLEANUP, NULL);
+
+	req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS, NULL);
+
 	if (IS_ERR(req)) {
 		ret = PTR_ERR(req);
 		goto out;
 	}
 
+	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
 	ret = zfcp_fsf_setup_ct_els_sbals(req, els->req, els->resp, 2);
 
 	if (ret)
@@ -1234,15 +1231,16 @@ int zfcp_fsf_exchange_config_data(struct
 	spin_lock_bh(&adapter->req_q_lock);
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
-	req = zfcp_fsf_req_create(adapter,
-				  FSF_QTCB_EXCHANGE_CONFIG_DATA,
-				  ZFCP_REQ_AUTO_CLEANUP,
+
+	req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
 				  adapter->pool.erp_req);
+
 	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
 
+	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
 	sbale = zfcp_qdio_sbale_req(req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
@@ -1278,8 +1276,8 @@ int zfcp_fsf_exchange_config_data_sync(s
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out_unlock;
 
-	req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
-				  0, NULL);
+	req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA, NULL);
+
 	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out_unlock;
@@ -1331,14 +1329,16 @@ int zfcp_fsf_exchange_port_data(struct z
 	spin_lock_bh(&adapter->req_q_lock);
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
+
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
-				  ZFCP_REQ_AUTO_CLEANUP,
 				  adapter->pool.erp_req);
+
 	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
 
+	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
 	sbale = zfcp_qdio_sbale_req(req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
@@ -1378,8 +1378,8 @@ int zfcp_fsf_exchange_port_data_sync(str
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out_unlock;
 
-	req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 0,
-				  NULL);
+	req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, NULL);
+
 	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out_unlock;
@@ -1500,15 +1500,15 @@ int zfcp_fsf_open_port(struct zfcp_erp_a
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
 
-	req = zfcp_fsf_req_create(adapter,
-				  FSF_QTCB_OPEN_PORT_WITH_DID,
-				  ZFCP_REQ_AUTO_CLEANUP,
+	req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_PORT_WITH_DID,
 				  adapter->pool.erp_req);
+
 	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
 
+	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
 	sbale = zfcp_qdio_sbale_req(req);
         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
@@ -1571,13 +1571,14 @@ int zfcp_fsf_close_port(struct zfcp_erp_
 		goto out;
 
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
-				  ZFCP_REQ_AUTO_CLEANUP,
 				  adapter->pool.erp_req);
+
 	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
 
+	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
 	sbale = zfcp_qdio_sbale_req(req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
@@ -1646,15 +1647,15 @@ int zfcp_fsf_open_wka_port(struct zfcp_w
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
 
-	req = zfcp_fsf_req_create(adapter,
-				  FSF_QTCB_OPEN_PORT_WITH_DID,
-				  ZFCP_REQ_AUTO_CLEANUP,
+	req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_PORT_WITH_DID,
 				  adapter->pool.erp_req);
+
 	if (unlikely(IS_ERR(req))) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
 
+	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
 	sbale = zfcp_qdio_sbale_req(req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
@@ -1702,13 +1703,14 @@ int zfcp_fsf_close_wka_port(struct zfcp_
 		goto out;
 
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
-				  ZFCP_REQ_AUTO_CLEANUP,
 				  adapter->pool.erp_req);
+
 	if (unlikely(IS_ERR(req))) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
 
+	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
 	sbale = zfcp_qdio_sbale_req(req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
@@ -1793,13 +1795,14 @@ int zfcp_fsf_close_physical_port(struct 
 		goto out;
 
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT,
-				  ZFCP_REQ_AUTO_CLEANUP,
 				  adapter->pool.erp_req);
+
 	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
 
+	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
 	sbale = zfcp_qdio_sbale_req(req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
@@ -1965,13 +1968,14 @@ int zfcp_fsf_open_unit(struct zfcp_erp_a
 		goto out;
 
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN,
-				  ZFCP_REQ_AUTO_CLEANUP,
 				  adapter->pool.erp_req);
+
 	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
 
+	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
 	sbale = zfcp_qdio_sbale_req(req);
         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
@@ -2049,14 +2053,16 @@ int zfcp_fsf_close_unit(struct zfcp_erp_
 	spin_lock_bh(&adapter->req_q_lock);
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
+
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
-				  ZFCP_REQ_AUTO_CLEANUP,
 				  adapter->pool.erp_req);
+
 	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
 
+	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
 	sbale = zfcp_qdio_sbale_req(req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
@@ -2353,14 +2359,16 @@ int zfcp_fsf_send_fcp_command_task(struc
 		atomic_inc(&adapter->qdio_outb_full);
 		goto out;
 	}
+
 	req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND,
-				  ZFCP_REQ_AUTO_CLEANUP,
 				  adapter->pool.scsi_req);
+
 	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
 
+	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
 	zfcp_unit_get(unit);
 	req->unit = unit;
 	req->data = scsi_cmnd;
@@ -2465,8 +2473,10 @@ struct zfcp_fsf_req *zfcp_fsf_send_fcp_c
 	spin_lock_bh(&adapter->req_q_lock);
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
-	req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, 0,
+
+	req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND,
 				  adapter->pool.scsi_req);
+
 	if (IS_ERR(req)) {
 		req = NULL;
 		goto out;
@@ -2537,7 +2547,7 @@ struct zfcp_fsf_req *zfcp_fsf_control_fi
 	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
 
-	req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, 0, NULL);
+	req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, NULL);
 	if (IS_ERR(req)) {
 		retval = -EPERM;
 		goto out;

[patch 12/27] zfcp: Move workqueue to adapter struct

[Christof Schmitt]

[-- Attachment #1: 713-zfcp-work-queue.diff --]
[-- Type: text/plain, Size: 5090 bytes --]

From: Swen Schillig <swen@vnet.ibm.com>

Remove the global driver work queue and replace it with a workqueue
local to the adapter. The usage of this workqueue makes this the
correct place for the structure. In addition multiple adapters won't
block each other due to the serialization of the queued work.

Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
--- a/drivers/s390/scsi/zfcp_aux.c	2009-08-17 12:41:58.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_aux.c	2009-08-17 12:41:58.000000000 +0200
@@ -176,8 +176,6 @@ static int __init zfcp_module_init(void)
 	if (!zfcp_data.gid_pn_cache)
 		goto out_gid_cache;
 
-	zfcp_data.work_queue = create_singlethread_workqueue("zfcp_wq");
-
 	sema_init(&zfcp_data.config_sema, 1);
 	rwlock_init(&zfcp_data.config_lock);
 
@@ -458,6 +456,27 @@ static void zfcp_print_sl(struct seq_fil
 		   adapter->fsf_lic_version);
 }
 
+static int zfcp_setup_adapter_work_queue(struct zfcp_adapter *adapter)
+{
+	char name[TASK_COMM_LEN];
+
+	snprintf(name, sizeof(name), "zfcp_q_%s",
+		 dev_name(&adapter->ccw_device->dev));
+	adapter->work_queue = create_singlethread_workqueue(name);
+
+	if (adapter->work_queue)
+		return 0;
+	return -ENOMEM;
+}
+
+static void zfcp_destroy_adapter_work_queue(struct zfcp_adapter *adapter)
+{
+	if (adapter->work_queue)
+		destroy_workqueue(adapter->work_queue);
+	adapter->work_queue = NULL;
+
+}
+
 /**
  * zfcp_adapter_enqueue - enqueue a new adapter to the list
  * @ccw_device: pointer to the struct cc_device
@@ -504,6 +523,9 @@ int zfcp_adapter_enqueue(struct ccw_devi
 	if (zfcp_adapter_debug_register(adapter))
 		goto debug_register_failed;
 
+	if (zfcp_setup_adapter_work_queue(adapter))
+		goto work_queue_failed;
+
 	init_waitqueue_head(&adapter->remove_wq);
 	init_waitqueue_head(&adapter->erp_thread_wqh);
 	init_waitqueue_head(&adapter->erp_done_wqh);
@@ -543,6 +565,8 @@ int zfcp_adapter_enqueue(struct ccw_devi
 		return 0;
 
 sysfs_failed:
+	zfcp_destroy_adapter_work_queue(adapter);
+work_queue_failed:
 	zfcp_adapter_debug_unregister(adapter);
 debug_register_failed:
 	dev_set_drvdata(&ccw_device->dev, NULL);
@@ -579,6 +603,7 @@ void zfcp_adapter_dequeue(struct zfcp_ad
 	if (!retval)
 		return;
 
+	zfcp_destroy_adapter_work_queue(adapter);
 	zfcp_adapter_debug_unregister(adapter);
 	zfcp_qdio_free(adapter);
 	zfcp_free_low_mem_buffers(adapter);
--- a/drivers/s390/scsi/zfcp_def.h	2009-08-17 12:41:58.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_def.h	2009-08-17 12:41:58.000000000 +0200
@@ -485,6 +485,7 @@ struct zfcp_adapter {
 	struct work_struct	scan_work;
 	struct service_level	service_level;
 	atomic_t		qdio_outb_full;	   /* queue full incidents */
+	struct workqueue_struct	*work_queue;
 };
 
 struct zfcp_port {
@@ -573,7 +574,6 @@ struct zfcp_data {
 	struct kmem_cache	*qtcb_cache;
 	struct kmem_cache	*sr_buffer_cache;
 	struct kmem_cache	*gid_pn_cache;
-	struct workqueue_struct	*work_queue;
 };
 
 /********************** ZFCP SPECIFIC DEFINES ********************************/
--- a/drivers/s390/scsi/zfcp_erp.c	2009-08-17 12:41:58.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_erp.c	2009-08-17 12:41:58.000000000 +0200
@@ -875,7 +875,7 @@ static int zfcp_erp_port_strategy_open_c
 			return zfcp_erp_open_ptp_port(act);
 		if (!port->d_id) {
 			zfcp_port_get(port);
-			if (!queue_work(zfcp_data.work_queue,
+			if (!queue_work(adapter->work_queue,
 					&port->gid_pn_work))
 				zfcp_port_put(port);
 			return ZFCP_ERP_CONTINUES;
--- a/drivers/s390/scsi/zfcp_fc.c	2009-08-17 12:41:58.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fc.c	2009-08-17 12:41:58.000000000 +0200
@@ -480,7 +480,7 @@ out:
 void zfcp_test_link(struct zfcp_port *port)
 {
 	zfcp_port_get(port);
-	if (!queue_work(zfcp_data.work_queue, &port->test_link_work))
+	if (!queue_work(port->adapter->work_queue, &port->test_link_work))
 		zfcp_port_put(port);
 }
 
--- a/drivers/s390/scsi/zfcp_fsf.c	2009-08-17 12:41:58.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fsf.c	2009-08-17 12:41:58.000000000 +0200
@@ -305,7 +305,7 @@ static void zfcp_fsf_status_read_handler
 	zfcp_fsf_req_free(req);
 
 	atomic_inc(&adapter->stat_miss);
-	queue_work(zfcp_data.work_queue, &adapter->stat_work);
+	queue_work(adapter->work_queue, &adapter->stat_work);
 }
 
 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
--- a/drivers/s390/scsi/zfcp_scsi.c	2009-08-17 12:41:58.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_scsi.c	2009-08-17 12:41:58.000000000 +0200
@@ -572,7 +572,7 @@ void zfcp_scsi_schedule_rport_register(s
 	zfcp_port_get(port);
 	port->rport_task = RPORT_ADD;
 
-	if (!queue_work(zfcp_data.work_queue, &port->rport_work))
+	if (!queue_work(port->adapter->work_queue, &port->rport_work))
 		zfcp_port_put(port);
 }
 
@@ -581,7 +581,8 @@ void zfcp_scsi_schedule_rport_block(stru
 	zfcp_port_get(port);
 	port->rport_task = RPORT_DEL;
 
-	if (port->rport && queue_work(zfcp_data.work_queue, &port->rport_work))
+	if (port->rport && queue_work(port->adapter->work_queue,
+				      &port->rport_work))
 		return;
 
 	zfcp_port_put(port);

[patch 13/27] zfcp: Separate qdio attributes from zfcp_fsf_req

[Christof Schmitt]

[-- Attachment #1: 714-zfcp-qdio-attributes.diff --]
[-- Type: text/plain, Size: 22710 bytes --]

From: Swen Schillig <swen@vnet.ibm.com>

Split all qdio related attributes out of zfcp_fsf_req and put it in
new structure.

Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---

 drivers/s390/scsi/zfcp_dbf.c  |    6 +-
 drivers/s390/scsi/zfcp_def.h  |   84 ++++++++++++++++++++++++-------------
 drivers/s390/scsi/zfcp_ext.h  |   11 +++-
 drivers/s390/scsi/zfcp_fsf.c  |   79 ++++++++++++++++++----------------
 drivers/s390/scsi/zfcp_qdio.c |   95 ++++++++++++++++++++++--------------------
 5 files changed, 160 insertions(+), 115 deletions(-)

--- a/drivers/s390/scsi/zfcp_dbf.c	2009-08-17 11:29:09.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_dbf.c	2009-08-17 11:29:29.000000000 +0200
@@ -152,9 +152,9 @@ void _zfcp_hba_dbf_event_fsf_response(co
 	memcpy(response->fsf_status_qual,
 	       fsf_status_qual, FSF_STATUS_QUALIFIER_SIZE);
 	response->fsf_req_status = fsf_req->status;
-	response->sbal_first = fsf_req->sbal_first;
-	response->sbal_last = fsf_req->sbal_last;
-	response->sbal_response = fsf_req->sbal_response;
+	response->sbal_first = fsf_req->queue_req.sbal_first;
+	response->sbal_last = fsf_req->queue_req.sbal_last;
+	response->sbal_response = fsf_req->queue_req.sbal_response;
 	response->pool = fsf_req->pool != NULL;
 	response->erp_action = (unsigned long)fsf_req->erp_action;
 
--- a/drivers/s390/scsi/zfcp_def.h	2009-08-17 11:29:26.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_def.h	2009-08-17 11:29:29.000000000 +0200
@@ -529,36 +529,64 @@ struct zfcp_unit {
 	struct work_struct	scsi_work;
 };
 
-/* FSF request */
+/**
+ * struct zfcp_queue_req - queue related values for a request
+ * @sbal_number: number of free SBALs
+ * @sbal_first: first SBAL for this request
+ * @sbal_last: last SBAL for this request
+ * @sbal_limit: last possible SBAL for this request
+ * @sbale_curr: current SBALE at creation of this request
+ * @sbal_response: SBAL used in interrupt
+ * @qdio_outb_usage: usage of outbound queue
+ * @qdio_inb_usage: usage of inbound queue
+ */
+struct zfcp_queue_req {
+	u8		       sbal_number;
+	u8		       sbal_first;
+	u8		       sbal_last;
+	u8		       sbal_limit;
+	u8		       sbale_curr;
+	u8		       sbal_response;
+	u16		       qdio_outb_usage;
+	u16		       qdio_inb_usage;
+};
+
+/**
+ * struct zfcp_fsf_req - basic FSF request structure
+ * @list: list of FSF requests
+ * @req_id: unique request ID
+ * @adapter: adapter this request belongs to
+ * @queue_req: queue related values
+ * @completion: used to signal the completion of the request
+ * @status: status of the request
+ * @fsf_command: FSF command issued
+ * @qtcb: associated QTCB
+ * @seq_no: sequence number of this request
+ * @data: private data
+ * @timer: timer data of this request
+ * @erp_action: reference to erp action if request issued on behalf of ERP
+ * @pool: reference to memory pool if used for this request
+ * @issued: time when request was send (STCK)
+ * @unit: reference to unit if this request is a SCSI request
+ * @handler: handler which should be called to process response
+ */
 struct zfcp_fsf_req {
-	struct list_head       list;	       /* list of FSF requests */
-	unsigned long	       req_id;	       /* unique request ID */
-	struct zfcp_adapter    *adapter;       /* adapter request belongs to */
-	u8		       sbal_number;    /* nr of SBALs free for use */
-	u8		       sbal_first;     /* first SBAL for this request */
-	u8		       sbal_last;      /* last SBAL for this request */
-	u8		       sbal_limit;      /* last possible SBAL for
-						  this reuest */
-	u8		       sbale_curr;     /* current SBALE during creation
-						  of request */
-	u8			sbal_response;	/* SBAL used in interrupt */
-	struct completion	completion;	/* can be used by a routine
-						  to wait for completion */
-	u32			status;	       /* status of this request */
-	u32		       fsf_command;    /* FSF Command copy */
-	struct fsf_qtcb	       *qtcb;	       /* address of associated QTCB */
-	u32		       seq_no;         /* Sequence number of request */
-	void			*data;           /* private data of request */
-	struct timer_list     timer;	       /* used for erp or scsi er */
-	struct zfcp_erp_action *erp_action;    /* used if this request is
-						  issued on behalf of erp */
-	mempool_t	       *pool;	       /* used if request was alloacted
-						  from emergency pool */
-	unsigned long long     issued;         /* request sent time (STCK) */
-	struct zfcp_unit       *unit;
+	struct list_head	list;
+	unsigned long		req_id;
+	struct zfcp_adapter	*adapter;
+	struct zfcp_queue_req	queue_req;
+	struct completion	completion;
+	u32			status;
+	u32			fsf_command;
+	struct fsf_qtcb		*qtcb;
+	u32			seq_no;
+	void			*data;
+	struct timer_list	timer;
+	struct zfcp_erp_action	*erp_action;
+	mempool_t		*pool;
+	unsigned long long	issued;
+	struct zfcp_unit	*unit;
 	void			(*handler)(struct zfcp_fsf_req *);
-	u16			qdio_outb_usage;/* usage of outbound queue */
-	u16			qdio_inb_usage;	/* usage of inbound queue */
 };
 
 /* driver data */
--- a/drivers/s390/scsi/zfcp_ext.h	2009-08-17 11:29:17.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_ext.h	2009-08-17 11:29:29.000000000 +0200
@@ -142,10 +142,13 @@ extern void zfcp_fsf_reqid_check(struct 
 /* zfcp_qdio.c */
 extern int zfcp_qdio_allocate(struct zfcp_adapter *);
 extern void zfcp_qdio_free(struct zfcp_adapter *);
-extern int zfcp_qdio_send(struct zfcp_fsf_req *);
-extern struct qdio_buffer_element *zfcp_qdio_sbale_req(struct zfcp_fsf_req *);
-extern struct qdio_buffer_element *zfcp_qdio_sbale_curr(struct zfcp_fsf_req *);
-extern int zfcp_qdio_sbals_from_sg(struct zfcp_fsf_req *, unsigned long,
+extern int zfcp_qdio_send(struct zfcp_adapter *, struct zfcp_queue_req *);
+extern struct qdio_buffer_element
+	*zfcp_qdio_sbale_req(struct zfcp_adapter *, struct zfcp_queue_req *);
+extern struct qdio_buffer_element
+	*zfcp_qdio_sbale_curr(struct zfcp_adapter *, struct zfcp_queue_req *);
+extern int zfcp_qdio_sbals_from_sg(struct zfcp_adapter *,
+				   struct zfcp_queue_req *, unsigned long,
 				   struct scatterlist *, int);
 extern int zfcp_qdio_open(struct zfcp_adapter *);
 extern void zfcp_qdio_close(struct zfcp_adapter *);
--- a/drivers/s390/scsi/zfcp_fsf.c	2009-08-17 11:29:26.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fsf.c	2009-08-17 11:29:29.000000000 +0200
@@ -720,12 +720,12 @@ static struct zfcp_fsf_req *zfcp_fsf_req
 	req->adapter = adapter;
 	req->fsf_command = fsf_cmd;
 	req->req_id = adapter->req_no;
-	req->sbal_number = 1;
-	req->sbal_first = req_q->first;
-	req->sbal_last = req_q->first;
-	req->sbale_curr = 1;
+	req->queue_req.sbal_number = 1;
+	req->queue_req.sbal_first = req_q->first;
+	req->queue_req.sbal_last = req_q->first;
+	req->queue_req.sbale_curr = 1;
 
-	sbale = zfcp_qdio_sbale_req(req);
+	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
 	sbale[0].addr = (void *) req->req_id;
 	sbale[0].flags |= SBAL_FLAGS0_COMMAND;
 
@@ -774,9 +774,9 @@ static int zfcp_fsf_req_send(struct zfcp
 	list_add_tail(&req->list, &adapter->req_list[idx]);
 	spin_unlock_irqrestore(&adapter->req_list_lock, flags);
 
-	req->qdio_outb_usage = atomic_read(&adapter->req_q.count);
+	req->queue_req.qdio_outb_usage = atomic_read(&adapter->req_q.count);
 	req->issued = get_clock();
-	if (zfcp_qdio_send(req)) {
+	if (zfcp_qdio_send(adapter, &req->queue_req)) {
 		del_timer(&req->timer);
 		spin_lock_irqsave(&adapter->req_list_lock, flags);
 		/* lookup request again, list might have changed */
@@ -819,9 +819,9 @@ int zfcp_fsf_status_read(struct zfcp_ada
 		goto out;
 	}
 
-	sbale = zfcp_qdio_sbale_req(req);
+	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
 	sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
-	req->sbale_curr = 2;
+	req->queue_req.sbale_curr = 2;
 
 	sr_buf = mempool_alloc(adapter->pool.status_read_data, GFP_ATOMIC);
 	if (!sr_buf) {
@@ -830,7 +830,7 @@ int zfcp_fsf_status_read(struct zfcp_ada
 	}
 	memset(sr_buf, 0, sizeof(*sr_buf));
 	req->data = sr_buf;
-	sbale = zfcp_qdio_sbale_curr(req);
+	sbale = zfcp_qdio_sbale_curr(adapter, &req->queue_req);
 	sbale->addr = (void *) sr_buf;
 	sbale->length = sizeof(*sr_buf);
 
@@ -929,7 +929,7 @@ struct zfcp_fsf_req *zfcp_fsf_abort_fcp_
 		       ZFCP_STATUS_COMMON_UNBLOCKED)))
 		goto out_error_free;
 
-	sbale = zfcp_qdio_sbale_req(req);
+	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
@@ -1023,8 +1023,10 @@ static int zfcp_fsf_setup_ct_els_sbals(s
 				       struct scatterlist *sg_resp,
 				       int max_sbals)
 {
-	struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(req);
-	u32 feat = req->adapter->adapter_features;
+	struct zfcp_adapter *adapter = req->adapter;
+	struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(adapter,
+							       &req->queue_req);
+	u32 feat = adapter->adapter_features;
 	int bytes;
 
 	if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
@@ -1041,14 +1043,16 @@ static int zfcp_fsf_setup_ct_els_sbals(s
 		return 0;
 	}
 
-	bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
+	bytes = zfcp_qdio_sbals_from_sg(adapter, &req->queue_req,
+					SBAL_FLAGS0_TYPE_WRITE_READ,
 					sg_req, max_sbals);
 	if (bytes <= 0)
 		return -EIO;
 	req->qtcb->bottom.support.req_buf_length = bytes;
-	req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
+	req->queue_req.sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
 
-	bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
+	bytes = zfcp_qdio_sbals_from_sg(adapter, &req->queue_req,
+					SBAL_FLAGS0_TYPE_WRITE_READ,
 					sg_resp, max_sbals);
 	if (bytes <= 0)
 		return -EIO;
@@ -1241,7 +1245,7 @@ int zfcp_fsf_exchange_config_data(struct
 	}
 
 	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
-	sbale = zfcp_qdio_sbale_req(req);
+	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
@@ -1283,7 +1287,7 @@ int zfcp_fsf_exchange_config_data_sync(s
 		goto out_unlock;
 	}
 
-	sbale = zfcp_qdio_sbale_req(req);
+	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 	req->handler = zfcp_fsf_exchange_config_data_handler;
@@ -1339,7 +1343,7 @@ int zfcp_fsf_exchange_port_data(struct z
 	}
 
 	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
-	sbale = zfcp_qdio_sbale_req(req);
+	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
@@ -1388,7 +1392,7 @@ int zfcp_fsf_exchange_port_data_sync(str
 	if (data)
 		req->data = data;
 
-	sbale = zfcp_qdio_sbale_req(req);
+	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
@@ -1509,7 +1513,7 @@ int zfcp_fsf_open_port(struct zfcp_erp_a
 	}
 
 	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
-	sbale = zfcp_qdio_sbale_req(req);
+	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
@@ -1579,7 +1583,7 @@ int zfcp_fsf_close_port(struct zfcp_erp_
 	}
 
 	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
-	sbale = zfcp_qdio_sbale_req(req);
+	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
@@ -1656,7 +1660,7 @@ int zfcp_fsf_open_wka_port(struct zfcp_w
 	}
 
 	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
-	sbale = zfcp_qdio_sbale_req(req);
+	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
@@ -1711,7 +1715,7 @@ int zfcp_fsf_close_wka_port(struct zfcp_
 	}
 
 	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
-	sbale = zfcp_qdio_sbale_req(req);
+	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
@@ -1803,7 +1807,7 @@ int zfcp_fsf_close_physical_port(struct 
 	}
 
 	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
-	sbale = zfcp_qdio_sbale_req(req);
+	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
@@ -1976,7 +1980,7 @@ int zfcp_fsf_open_unit(struct zfcp_erp_a
 	}
 
 	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
-	sbale = zfcp_qdio_sbale_req(req);
+	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
@@ -2063,7 +2067,7 @@ int zfcp_fsf_close_unit(struct zfcp_erp_
 	}
 
 	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
-	sbale = zfcp_qdio_sbale_req(req);
+	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
@@ -2140,8 +2144,8 @@ static void zfcp_fsf_trace_latency(struc
 	}
 	if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
 		trace.flags |= ZFCP_BLK_REQ_ERROR;
-	trace.inb_usage = fsf_req->qdio_inb_usage;
-	trace.outb_usage = fsf_req->qdio_outb_usage;
+	trace.inb_usage = fsf_req->queue_req.qdio_inb_usage;
+	trace.outb_usage = fsf_req->queue_req.qdio_outb_usage;
 
 	blk_add_driver_data(req->q, req, &trace, sizeof(trace));
 }
@@ -2420,11 +2424,11 @@ int zfcp_fsf_send_fcp_command_task(struc
 	req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
 		fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32);
 
-	real_bytes = zfcp_qdio_sbals_from_sg(req, sbtype,
+	real_bytes = zfcp_qdio_sbals_from_sg(adapter, &req->queue_req, sbtype,
 					     scsi_sglist(scsi_cmnd),
 					     FSF_MAX_SBALS_PER_REQ);
 	if (unlikely(real_bytes < 0)) {
-		if (req->sbal_number >= FSF_MAX_SBALS_PER_REQ) {
+		if (req->queue_req.sbal_number >= FSF_MAX_SBALS_PER_REQ) {
 			dev_err(&adapter->ccw_device->dev,
 				"Oversize data package, unit 0x%016Lx "
 				"on port 0x%016Lx closed\n",
@@ -2492,7 +2496,7 @@ struct zfcp_fsf_req *zfcp_fsf_send_fcp_c
 	req->qtcb->bottom.io.fcp_cmnd_length = 	sizeof(struct fcp_cmnd_iu) +
 						sizeof(u32);
 
-	sbale = zfcp_qdio_sbale_req(req);
+	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
@@ -2555,15 +2559,15 @@ struct zfcp_fsf_req *zfcp_fsf_control_fi
 
 	req->handler = zfcp_fsf_control_file_handler;
 
-	sbale = zfcp_qdio_sbale_req(req);
+	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
 	sbale[0].flags |= direction;
 
 	bottom = &req->qtcb->bottom.support;
 	bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
 	bottom->option = fsf_cfdc->option;
 
-	bytes = zfcp_qdio_sbals_from_sg(req, direction, fsf_cfdc->sg,
-					FSF_MAX_SBALS_PER_REQ);
+	bytes = zfcp_qdio_sbals_from_sg(adapter, &req->queue_req, direction,
+					fsf_cfdc->sg, FSF_MAX_SBALS_PER_REQ);
 	if (bytes != ZFCP_CFDC_MAX_SIZE) {
 		zfcp_fsf_req_free(req);
 		goto out;
@@ -2612,8 +2616,9 @@ void zfcp_fsf_reqid_check(struct zfcp_ad
 		list_del(&fsf_req->list);
 		spin_unlock_irqrestore(&adapter->req_list_lock, flags);
 
-		fsf_req->sbal_response = sbal_idx;
-		fsf_req->qdio_inb_usage = atomic_read(&adapter->resp_q.count);
+		fsf_req->queue_req.sbal_response = sbal_idx;
+		fsf_req->queue_req.qdio_inb_usage =
+			atomic_read(&adapter->resp_q.count);
 		zfcp_fsf_req_complete(fsf_req);
 
 		if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY))
--- a/drivers/s390/scsi/zfcp_qdio.c	2009-08-17 11:29:17.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_qdio.c	2009-08-17 11:29:29.000000000 +0200
@@ -3,7 +3,7 @@
  *
  * Setup and helper functions to access QDIO.
  *
- * Copyright IBM Corporation 2002, 2008
+ * Copyright IBM Corporation 2002, 2009
  */
 
 #define KMSG_COMPONENT "zfcp"
@@ -165,12 +165,14 @@ static void zfcp_qdio_int_resp(struct cc
 
 /**
  * zfcp_qdio_sbale_req - return ptr to SBALE of req_q for a struct zfcp_fsf_req
- * @fsf_req: pointer to struct fsf_req
+ * @adapter: pointer to struct zfcp_adapter
+ * @q_rec: pointer to struct zfcp_queue_rec
  * Returns: pointer to qdio_buffer_element (SBALE) structure
  */
-struct qdio_buffer_element *zfcp_qdio_sbale_req(struct zfcp_fsf_req *req)
+struct qdio_buffer_element *zfcp_qdio_sbale_req(struct zfcp_adapter *adapter,
+						struct zfcp_queue_req *q_req)
 {
-	return zfcp_qdio_sbale(&req->adapter->req_q, req->sbal_last, 0);
+	return zfcp_qdio_sbale(&adapter->req_q, q_req->sbal_last, 0);
 }
 
 /**
@@ -178,74 +180,80 @@ struct qdio_buffer_element *zfcp_qdio_sb
  * @fsf_req: pointer to struct fsf_req
  * Returns: pointer to qdio_buffer_element (SBALE) structure
  */
-struct qdio_buffer_element *zfcp_qdio_sbale_curr(struct zfcp_fsf_req *req)
+struct qdio_buffer_element *zfcp_qdio_sbale_curr(struct zfcp_adapter *adapter,
+						 struct zfcp_queue_req *q_req)
 {
-	return zfcp_qdio_sbale(&req->adapter->req_q, req->sbal_last,
-			       req->sbale_curr);
+	return zfcp_qdio_sbale(&adapter->req_q, q_req->sbal_last,
+			       q_req->sbale_curr);
 }
 
-static void zfcp_qdio_sbal_limit(struct zfcp_fsf_req *fsf_req, int max_sbals)
+static void zfcp_qdio_sbal_limit(struct zfcp_adapter *adapter,
+				 struct zfcp_queue_req *q_req, int max_sbals)
 {
-	int count = atomic_read(&fsf_req->adapter->req_q.count);
+	int count = atomic_read(&adapter->req_q.count);
 	count = min(count, max_sbals);
-	fsf_req->sbal_limit = (fsf_req->sbal_first + count - 1)
+	q_req->sbal_limit = (q_req->sbal_first + count - 1)
 					% QDIO_MAX_BUFFERS_PER_Q;
 }
 
 static struct qdio_buffer_element *
-zfcp_qdio_sbal_chain(struct zfcp_fsf_req *fsf_req, unsigned long sbtype)
+zfcp_qdio_sbal_chain(struct zfcp_adapter *adapter, struct zfcp_queue_req *q_req,
+		     unsigned long sbtype)
 {
 	struct qdio_buffer_element *sbale;
 
 	/* set last entry flag in current SBALE of current SBAL */
-	sbale = zfcp_qdio_sbale_curr(fsf_req);
+	sbale = zfcp_qdio_sbale_curr(adapter, q_req);
 	sbale->flags |= SBAL_FLAGS_LAST_ENTRY;
 
 	/* don't exceed last allowed SBAL */
-	if (fsf_req->sbal_last == fsf_req->sbal_limit)
+	if (q_req->sbal_last == q_req->sbal_limit)
 		return NULL;
 
 	/* set chaining flag in first SBALE of current SBAL */
-	sbale = zfcp_qdio_sbale_req(fsf_req);
+	sbale = zfcp_qdio_sbale_req(adapter, q_req);
 	sbale->flags |= SBAL_FLAGS0_MORE_SBALS;
 
 	/* calculate index of next SBAL */
-	fsf_req->sbal_last++;
-	fsf_req->sbal_last %= QDIO_MAX_BUFFERS_PER_Q;
+	q_req->sbal_last++;
+	q_req->sbal_last %= QDIO_MAX_BUFFERS_PER_Q;
 
 	/* keep this requests number of SBALs up-to-date */
-	fsf_req->sbal_number++;
+	q_req->sbal_number++;
 
 	/* start at first SBALE of new SBAL */
-	fsf_req->sbale_curr = 0;
+	q_req->sbale_curr = 0;
 
 	/* set storage-block type for new SBAL */
-	sbale = zfcp_qdio_sbale_curr(fsf_req);
+	sbale = zfcp_qdio_sbale_curr(adapter, q_req);
 	sbale->flags |= sbtype;
 
 	return sbale;
 }
 
 static struct qdio_buffer_element *
-zfcp_qdio_sbale_next(struct zfcp_fsf_req *fsf_req, unsigned long sbtype)
+zfcp_qdio_sbale_next(struct zfcp_adapter *adapter, struct zfcp_queue_req *q_req,
+		     unsigned int sbtype)
 {
-	if (fsf_req->sbale_curr == ZFCP_LAST_SBALE_PER_SBAL)
-		return zfcp_qdio_sbal_chain(fsf_req, sbtype);
-	fsf_req->sbale_curr++;
-	return zfcp_qdio_sbale_curr(fsf_req);
+	if (q_req->sbale_curr == ZFCP_LAST_SBALE_PER_SBAL)
+		return zfcp_qdio_sbal_chain(adapter, q_req, sbtype);
+	q_req->sbale_curr++;
+	return zfcp_qdio_sbale_curr(adapter, q_req);
 }
 
-static void zfcp_qdio_undo_sbals(struct zfcp_fsf_req *fsf_req)
+static void zfcp_qdio_undo_sbals(struct zfcp_adapter *adapter,
+				 struct zfcp_queue_req *q_req)
 {
-	struct qdio_buffer **sbal = fsf_req->adapter->req_q.sbal;
-	int first = fsf_req->sbal_first;
-	int last = fsf_req->sbal_last;
+	struct qdio_buffer **sbal = adapter->req_q.sbal;
+	int first = q_req->sbal_first;
+	int last = q_req->sbal_last;
 	int count = (last - first + QDIO_MAX_BUFFERS_PER_Q) %
 		QDIO_MAX_BUFFERS_PER_Q + 1;
 	zfcp_qdio_zero_sbals(sbal, first, count);
 }
 
-static int zfcp_qdio_fill_sbals(struct zfcp_fsf_req *fsf_req,
+static int zfcp_qdio_fill_sbals(struct zfcp_adapter *adapter,
+				struct zfcp_queue_req *q_req,
 				unsigned int sbtype, void *start_addr,
 				unsigned int total_length)
 {
@@ -256,10 +264,10 @@ static int zfcp_qdio_fill_sbals(struct z
 	/* split segment up */
 	for (addr = start_addr, remaining = total_length; remaining > 0;
 	     addr += length, remaining -= length) {
-		sbale = zfcp_qdio_sbale_next(fsf_req, sbtype);
+		sbale = zfcp_qdio_sbale_next(adapter, q_req, sbtype);
 		if (!sbale) {
-			atomic_inc(&fsf_req->adapter->qdio_outb_full);
-			zfcp_qdio_undo_sbals(fsf_req);
+			atomic_inc(&adapter->qdio_outb_full);
+			zfcp_qdio_undo_sbals(adapter, q_req);
 			return -EINVAL;
 		}
 
@@ -281,29 +289,31 @@ static int zfcp_qdio_fill_sbals(struct z
  * @max_sbals: upper bound for number of SBALs to be used
  * Returns: number of bytes, or error (negativ)
  */
-int zfcp_qdio_sbals_from_sg(struct zfcp_fsf_req *fsf_req, unsigned long sbtype,
-			    struct scatterlist *sg, int max_sbals)
+int zfcp_qdio_sbals_from_sg(struct zfcp_adapter *adapter,
+			    struct zfcp_queue_req *q_req,
+			    unsigned long sbtype, struct scatterlist *sg,
+			    int max_sbals)
 {
 	struct qdio_buffer_element *sbale;
 	int retval, bytes = 0;
 
 	/* figure out last allowed SBAL */
-	zfcp_qdio_sbal_limit(fsf_req, max_sbals);
+	zfcp_qdio_sbal_limit(adapter, q_req, max_sbals);
 
 	/* set storage-block type for this request */
-	sbale = zfcp_qdio_sbale_req(fsf_req);
+	sbale = zfcp_qdio_sbale_req(adapter, q_req);
 	sbale->flags |= sbtype;
 
 	for (; sg; sg = sg_next(sg)) {
-		retval = zfcp_qdio_fill_sbals(fsf_req, sbtype, sg_virt(sg),
-					      sg->length);
+		retval = zfcp_qdio_fill_sbals(adapter, q_req, sbtype,
+					      sg_virt(sg), sg->length);
 		if (retval < 0)
 			return retval;
 		bytes += sg->length;
 	}
 
 	/* assume that no other SBALEs are to follow in the same SBAL */
-	sbale = zfcp_qdio_sbale_curr(fsf_req);
+	sbale = zfcp_qdio_sbale_curr(adapter, q_req);
 	sbale->flags |= SBAL_FLAGS_LAST_ENTRY;
 
 	return bytes;
@@ -314,12 +324,11 @@ int zfcp_qdio_sbals_from_sg(struct zfcp_
  * @fsf_req: pointer to struct zfcp_fsf_req
  * Returns: 0 on success, error otherwise
  */
-int zfcp_qdio_send(struct zfcp_fsf_req *fsf_req)
+int zfcp_qdio_send(struct zfcp_adapter *adapter, struct zfcp_queue_req *q_req)
 {
-	struct zfcp_adapter *adapter = fsf_req->adapter;
 	struct zfcp_qdio_queue *req_q = &adapter->req_q;
-	int first = fsf_req->sbal_first;
-	int count = fsf_req->sbal_number;
+	int first = q_req->sbal_first;
+	int count = q_req->sbal_number;
 	int retval;
 	unsigned int qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
 

[patch 14/27] zfcp: Move qdio related data out of zfcp_adapter

[Christof Schmitt]

[-- Attachment #1: 715-zfcp-structure-cleanup.diff --]
[-- Type: text/plain, Size: 59076 bytes --]

From: Swen Schillig <swen@vnet.ibm.com>

The zfcp_adapter structure was growing over time to a size of almost
one memory page. To reduce the size of the data structure and to
seperate different layers, put all qdio related data in the new
zfcp_qdio data structure.

Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---

 drivers/s390/scsi/zfcp_aux.c   |   20 +-
 drivers/s390/scsi/zfcp_dbf.c   |    6 
 drivers/s390/scsi/zfcp_def.h   |   34 +++-
 drivers/s390/scsi/zfcp_erp.c   |    8 -
 drivers/s390/scsi/zfcp_ext.h   |   26 +--
 drivers/s390/scsi/zfcp_fsf.c   |  299 +++++++++++++++++++++--------------------
 drivers/s390/scsi/zfcp_qdio.c  |  222 ++++++++++++++++--------------
 drivers/s390/scsi/zfcp_scsi.c  |    6 
 drivers/s390/scsi/zfcp_sysfs.c |   16 +-
 9 files changed, 342 insertions(+), 295 deletions(-)

--- a/drivers/s390/scsi/zfcp_aux.c	2009-08-12 12:36:52.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_aux.c	2009-08-12 12:37:22.000000000 +0200
@@ -428,7 +428,7 @@ static void zfcp_free_low_mem_buffers(st
 int zfcp_status_read_refill(struct zfcp_adapter *adapter)
 {
 	while (atomic_read(&adapter->stat_miss) > 0)
-		if (zfcp_fsf_status_read(adapter)) {
+		if (zfcp_fsf_status_read(adapter->qdio)) {
 			if (atomic_read(&adapter->stat_miss) >= 16) {
 				zfcp_erp_adapter_reopen(adapter, 0, "axsref1",
 							NULL);
@@ -507,11 +507,16 @@ int zfcp_adapter_enqueue(struct ccw_devi
 		return -ENOMEM;
 	}
 
+	adapter->qdio = kzalloc(sizeof(struct zfcp_qdio), GFP_KERNEL);
+	if (!adapter->qdio)
+		goto qdio_mem_failed;
+
+	adapter->qdio->adapter = adapter;
 	ccw_device->handler = NULL;
 	adapter->ccw_device = ccw_device;
 	atomic_set(&adapter->refcount, 0);
 
-	if (zfcp_qdio_allocate(adapter))
+	if (zfcp_qdio_allocate(adapter->qdio, ccw_device))
 		goto qdio_allocate_failed;
 
 	if (zfcp_allocate_low_mem_buffers(adapter))
@@ -536,8 +541,8 @@ int zfcp_adapter_enqueue(struct ccw_devi
 
 	spin_lock_init(&adapter->req_list_lock);
 
-	spin_lock_init(&adapter->req_q_lock);
-	spin_lock_init(&adapter->qdio_stat_lock);
+	spin_lock_init(&adapter->qdio->req_q_lock);
+	spin_lock_init(&adapter->qdio->stat_lock);
 
 	rwlock_init(&adapter->erp_lock);
 	rwlock_init(&adapter->abort_lock);
@@ -574,7 +579,9 @@ debug_register_failed:
 failed_low_mem_buffers:
 	zfcp_free_low_mem_buffers(adapter);
 qdio_allocate_failed:
-	zfcp_qdio_free(adapter);
+	zfcp_qdio_free(adapter->qdio);
+	kfree(adapter->qdio);
+qdio_mem_failed:
 	kfree(adapter);
 	return -ENOMEM;
 }
@@ -605,12 +612,13 @@ void zfcp_adapter_dequeue(struct zfcp_ad
 
 	zfcp_destroy_adapter_work_queue(adapter);
 	zfcp_adapter_debug_unregister(adapter);
-	zfcp_qdio_free(adapter);
+	zfcp_qdio_free(adapter->qdio);
 	zfcp_free_low_mem_buffers(adapter);
 	kfree(adapter->req_list);
 	kfree(adapter->fc_stats);
 	kfree(adapter->stats_reset_data);
 	kfree(adapter->gs);
+	kfree(adapter->qdio);
 	kfree(adapter);
 }
 
--- a/drivers/s390/scsi/zfcp_dbf.c	2009-08-12 12:36:52.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_dbf.c	2009-08-12 12:37:22.000000000 +0200
@@ -274,16 +274,16 @@ void _zfcp_hba_dbf_event_fsf_unsol(const
 
 /**
  * zfcp_hba_dbf_event_qdio - trace event for QDIO related failure
- * @adapter: adapter affected by this QDIO related event
+ * @qdio: qdio structure affected by this QDIO related event
  * @qdio_error: as passed by qdio module
  * @sbal_index: first buffer with error condition, as passed by qdio module
  * @sbal_count: number of buffers affected, as passed by qdio module
  */
-void zfcp_hba_dbf_event_qdio(struct zfcp_adapter *adapter,
+void zfcp_hba_dbf_event_qdio(struct zfcp_qdio *qdio,
 			     unsigned int qdio_error, int sbal_index,
 			     int sbal_count)
 {
-	struct zfcp_dbf *dbf = adapter->dbf;
+	struct zfcp_dbf *dbf = qdio->adapter->dbf;
 	struct zfcp_hba_dbf_record *r = &dbf->hba_dbf_buf;
 	unsigned long flags;
 
--- a/drivers/s390/scsi/zfcp_def.h	2009-08-12 12:36:52.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_def.h	2009-08-12 12:37:37.000000000 +0200
@@ -428,6 +428,29 @@ struct zfcp_latencies {
 	spinlock_t lock;
 };
 
+/** struct zfcp_qdio - basic QDIO data structure
+ * @resp_q: response queue
+ * @req_q: request queue
+ * @stat_lock: lock to protect req_q_util and req_q_time
+ * @req_q_lock; lock to serialize access to request queue
+ * @req_q_time: time of last fill level change
+ * @req_q_util: used for accounting
+ * @req_q_full: queue full incidents
+ * @req_q_wq: used to wait for SBAL availability
+ * @adapter: adapter used in conjunction with this QDIO structure
+ */
+struct zfcp_qdio {
+	struct zfcp_qdio_queue	resp_q;
+	struct zfcp_qdio_queue	req_q;
+	spinlock_t		stat_lock;
+	spinlock_t		req_q_lock;
+	ktime_t			req_q_time;
+	u64			req_q_util;
+	atomic_t		req_q_full;
+	wait_queue_head_t	req_q_wq;
+	struct zfcp_adapter	*adapter;
+};
+
 struct zfcp_adapter {
 	atomic_t                refcount;          /* reference count */
 	wait_queue_head_t	remove_wq;         /* can be used to wait for
@@ -436,6 +459,7 @@ struct zfcp_adapter {
 	u64			peer_wwpn;	   /* P2P peer WWPN */
 	u32			peer_d_id;	   /* P2P peer D_ID */
 	struct ccw_device       *ccw_device;	   /* S/390 ccw device */
+	struct zfcp_qdio	*qdio;
 	u32			hydra_version;	   /* Hydra version */
 	u32			fsf_lic_version;
 	u32			adapter_features;  /* FCP channel features */
@@ -447,15 +471,7 @@ struct zfcp_adapter {
 	unsigned long		req_no;		   /* unique FSF req number */
 	struct list_head	*req_list;	   /* list of pending reqs */
 	spinlock_t		req_list_lock;	   /* request list lock */
-	struct zfcp_qdio_queue	req_q;		   /* request queue */
-	spinlock_t		req_q_lock;	   /* for operations on queue */
-	ktime_t			req_q_time; /* time of last fill level change */
-	u64			req_q_util; /* for accounting */
-	spinlock_t		qdio_stat_lock;
 	u32			fsf_req_seq_no;	   /* FSF cmnd seq number */
-	wait_queue_head_t	request_wq;	   /* can be used to wait for
-						      more avaliable SBALs */
-	struct zfcp_qdio_queue	resp_q;	   /* response queue */
 	rwlock_t		abort_lock;        /* Protects against SCSI
 						      stack abort/command
 						      completion races */
@@ -478,13 +494,11 @@ struct zfcp_adapter {
 	struct zfcp_wka_ports	*gs;		   /* generic services */
 	struct zfcp_dbf		*dbf;		   /* debug traces */
 	struct zfcp_adapter_mempool	pool;      /* Adapter memory pools */
-	struct qdio_initialize  qdio_init_data;    /* for qdio_establish */
 	struct fc_host_statistics *fc_stats;
 	struct fsf_qtcb_bottom_port *stats_reset_data;
 	unsigned long		stats_reset;
 	struct work_struct	scan_work;
 	struct service_level	service_level;
-	atomic_t		qdio_outb_full;	   /* queue full incidents */
 	struct workqueue_struct	*work_queue;
 };
 
--- a/drivers/s390/scsi/zfcp_erp.c	2009-08-12 12:36:52.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_erp.c	2009-08-12 12:37:22.000000000 +0200
@@ -603,9 +603,11 @@ static void zfcp_erp_wakeup(struct zfcp_
 
 static int zfcp_erp_adapter_strategy_open_qdio(struct zfcp_erp_action *act)
 {
-	if (zfcp_qdio_open(act->adapter))
+	struct zfcp_qdio *qdio = act->adapter->qdio;
+
+	if (zfcp_qdio_open(qdio))
 		return ZFCP_ERP_FAILED;
-	init_waitqueue_head(&act->adapter->request_wq);
+	init_waitqueue_head(&qdio->req_q_wq);
 	atomic_set_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &act->adapter->status);
 	return ZFCP_ERP_SUCCEEDED;
 }
@@ -710,7 +712,7 @@ static void zfcp_erp_adapter_strategy_cl
 	struct zfcp_adapter *adapter = act->adapter;
 
 	/* close queues to ensure that buffers are not accessed by adapter */
-	zfcp_qdio_close(adapter);
+	zfcp_qdio_close(adapter->qdio);
 	zfcp_fsf_req_dismiss_all(adapter);
 	adapter->fsf_req_seq_no = 0;
 	zfcp_fc_wka_ports_force_offline(adapter->gs);
--- a/drivers/s390/scsi/zfcp_ext.h	2009-08-12 12:36:52.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_ext.h	2009-08-12 12:37:22.000000000 +0200
@@ -51,7 +51,7 @@ extern void _zfcp_hba_dbf_event_fsf_resp
 extern void _zfcp_hba_dbf_event_fsf_unsol(const char *, int level,
 					  struct zfcp_adapter *,
 					  struct fsf_status_read_buffer *);
-extern void zfcp_hba_dbf_event_qdio(struct zfcp_adapter *, unsigned int, int,
+extern void zfcp_hba_dbf_event_qdio(struct zfcp_qdio *, unsigned int, int,
 				    int);
 extern void zfcp_hba_dbf_event_berr(struct zfcp_adapter *,
 				    struct zfcp_fsf_req *);
@@ -118,15 +118,15 @@ extern int zfcp_fsf_close_physical_port(
 extern int zfcp_fsf_open_unit(struct zfcp_erp_action *);
 extern int zfcp_fsf_close_unit(struct zfcp_erp_action *);
 extern int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *);
-extern int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *,
+extern int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *,
 					      struct fsf_qtcb_bottom_config *);
 extern int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *);
-extern int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *,
+extern int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *,
 					    struct fsf_qtcb_bottom_port *);
 extern struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *,
 						  struct zfcp_fsf_cfdc *);
 extern void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *);
-extern int zfcp_fsf_status_read(struct zfcp_adapter *);
+extern int zfcp_fsf_status_read(struct zfcp_qdio *);
 extern int zfcp_status_read_refill(struct zfcp_adapter *adapter);
 extern int zfcp_fsf_send_ct(struct zfcp_send_ct *, mempool_t *,
 			    struct zfcp_erp_action *);
@@ -137,21 +137,21 @@ extern void zfcp_fsf_req_free(struct zfc
 extern struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *, u8);
 extern struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long,
 						       struct zfcp_unit *);
-extern void zfcp_fsf_reqid_check(struct zfcp_adapter *, int);
+extern void zfcp_fsf_reqid_check(struct zfcp_qdio *, int);
 
 /* zfcp_qdio.c */
-extern int zfcp_qdio_allocate(struct zfcp_adapter *);
-extern void zfcp_qdio_free(struct zfcp_adapter *);
-extern int zfcp_qdio_send(struct zfcp_adapter *, struct zfcp_queue_req *);
+extern int zfcp_qdio_allocate(struct zfcp_qdio *, struct ccw_device *);
+extern void zfcp_qdio_free(struct zfcp_qdio *);
+extern int zfcp_qdio_send(struct zfcp_qdio *, struct zfcp_queue_req *);
 extern struct qdio_buffer_element
-	*zfcp_qdio_sbale_req(struct zfcp_adapter *, struct zfcp_queue_req *);
+	*zfcp_qdio_sbale_req(struct zfcp_qdio *, struct zfcp_queue_req *);
 extern struct qdio_buffer_element
-	*zfcp_qdio_sbale_curr(struct zfcp_adapter *, struct zfcp_queue_req *);
-extern int zfcp_qdio_sbals_from_sg(struct zfcp_adapter *,
+	*zfcp_qdio_sbale_curr(struct zfcp_qdio *, struct zfcp_queue_req *);
+extern int zfcp_qdio_sbals_from_sg(struct zfcp_qdio *,
 				   struct zfcp_queue_req *, unsigned long,
 				   struct scatterlist *, int);
-extern int zfcp_qdio_open(struct zfcp_adapter *);
-extern void zfcp_qdio_close(struct zfcp_adapter *);
+extern int zfcp_qdio_open(struct zfcp_qdio *);
+extern void zfcp_qdio_close(struct zfcp_qdio *);
 
 /* zfcp_scsi.c */
 extern struct zfcp_data zfcp_data;
--- a/drivers/s390/scsi/zfcp_fsf.c	2009-08-12 12:36:52.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fsf.c	2009-08-12 12:37:22.000000000 +0200
@@ -637,33 +637,34 @@ static void zfcp_fsf_exchange_port_data_
 	}
 }
 
-static int zfcp_fsf_sbal_check(struct zfcp_adapter *adapter)
+static int zfcp_fsf_sbal_check(struct zfcp_qdio *qdio)
 {
-	struct zfcp_qdio_queue *req_q = &adapter->req_q;
+	struct zfcp_qdio_queue *req_q = &qdio->req_q;
 
-	spin_lock_bh(&adapter->req_q_lock);
+	spin_lock_bh(&qdio->req_q_lock);
 	if (atomic_read(&req_q->count))
 		return 1;
-	spin_unlock_bh(&adapter->req_q_lock);
+	spin_unlock_bh(&qdio->req_q_lock);
 	return 0;
 }
 
-static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter)
+static int zfcp_fsf_req_sbal_get(struct zfcp_qdio *qdio)
 {
+	struct zfcp_adapter *adapter = qdio->adapter;
 	long ret;
 
-	spin_unlock_bh(&adapter->req_q_lock);
-	ret = wait_event_interruptible_timeout(adapter->request_wq,
-			       zfcp_fsf_sbal_check(adapter), 5 * HZ);
+	spin_unlock_bh(&qdio->req_q_lock);
+	ret = wait_event_interruptible_timeout(qdio->req_q_wq,
+			       zfcp_fsf_sbal_check(qdio), 5 * HZ);
 	if (ret > 0)
 		return 0;
 	if (!ret) {
-		atomic_inc(&adapter->qdio_outb_full);
+		atomic_inc(&qdio->req_q_full);
 		/* assume hanging outbound queue, try queue recovery */
 		zfcp_erp_adapter_reopen(adapter, 0, "fsrsg_1", NULL);
 	}
 
-	spin_lock_bh(&adapter->req_q_lock);
+	spin_lock_bh(&qdio->req_q_lock);
 	return -EIO;
 }
 
@@ -700,11 +701,12 @@ static struct fsf_qtcb *zfcp_qtcb_alloc(
 	return qtcb;
 }
 
-static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_adapter *adapter,
+static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
 						u32 fsf_cmd, mempool_t *pool)
 {
 	struct qdio_buffer_element *sbale;
-	struct zfcp_qdio_queue *req_q = &adapter->req_q;
+	struct zfcp_qdio_queue *req_q = &qdio->req_q;
+	struct zfcp_adapter *adapter = qdio->adapter;
 	struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
 
 	if (unlikely(!req))
@@ -725,7 +727,7 @@ static struct zfcp_fsf_req *zfcp_fsf_req
 	req->queue_req.sbal_last = req_q->first;
 	req->queue_req.sbale_curr = 1;
 
-	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
+	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
 	sbale[0].addr = (void *) req->req_id;
 	sbale[0].flags |= SBAL_FLAGS0_COMMAND;
 
@@ -740,7 +742,7 @@ static struct zfcp_fsf_req *zfcp_fsf_req
 			return ERR_PTR(-ENOMEM);
 		}
 
-		req->qtcb->prefix.req_seq_no = req->adapter->fsf_req_seq_no;
+		req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
 		req->qtcb->prefix.req_id = req->req_id;
 		req->qtcb->prefix.ulp_info = 26;
 		req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
@@ -764,6 +766,7 @@ static struct zfcp_fsf_req *zfcp_fsf_req
 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
 {
 	struct zfcp_adapter *adapter = req->adapter;
+	struct zfcp_qdio *qdio = adapter->qdio;
 	unsigned long	     flags;
 	int		     idx;
 	int		     with_qtcb = (req->qtcb != NULL);
@@ -774,9 +777,9 @@ static int zfcp_fsf_req_send(struct zfcp
 	list_add_tail(&req->list, &adapter->req_list[idx]);
 	spin_unlock_irqrestore(&adapter->req_list_lock, flags);
 
-	req->queue_req.qdio_outb_usage = atomic_read(&adapter->req_q.count);
+	req->queue_req.qdio_outb_usage = atomic_read(&qdio->req_q.count);
 	req->issued = get_clock();
-	if (zfcp_qdio_send(adapter, &req->queue_req)) {
+	if (zfcp_qdio_send(qdio, &req->queue_req)) {
 		del_timer(&req->timer);
 		spin_lock_irqsave(&adapter->req_list_lock, flags);
 		/* lookup request again, list might have changed */
@@ -801,25 +804,26 @@ static int zfcp_fsf_req_send(struct zfcp
  * @req_flags: request flags
  * Returns: 0 on success, ERROR otherwise
  */
-int zfcp_fsf_status_read(struct zfcp_adapter *adapter)
+int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
 {
+	struct zfcp_adapter *adapter = qdio->adapter;
 	struct zfcp_fsf_req *req;
 	struct fsf_status_read_buffer *sr_buf;
 	struct qdio_buffer_element *sbale;
 	int retval = -EIO;
 
-	spin_lock_bh(&adapter->req_q_lock);
-	if (zfcp_fsf_req_sbal_get(adapter))
+	spin_lock_bh(&qdio->req_q_lock);
+	if (zfcp_fsf_req_sbal_get(qdio))
 		goto out;
 
-	req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
+	req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS,
 				  adapter->pool.status_read_req);
 	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out;
 	}
 
-	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
+	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
 	sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
 	req->queue_req.sbale_curr = 2;
 
@@ -830,7 +834,7 @@ int zfcp_fsf_status_read(struct zfcp_ada
 	}
 	memset(sr_buf, 0, sizeof(*sr_buf));
 	req->data = sr_buf;
-	sbale = zfcp_qdio_sbale_curr(adapter, &req->queue_req);
+	sbale = zfcp_qdio_sbale_curr(qdio, &req->queue_req);
 	sbale->addr = (void *) sr_buf;
 	sbale->length = sizeof(*sr_buf);
 
@@ -846,7 +850,7 @@ failed_buf:
 	zfcp_fsf_req_free(req);
 	zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
 out:
-	spin_unlock_bh(&adapter->req_q_lock);
+	spin_unlock_bh(&qdio->req_q_lock);
 	return retval;
 }
 
@@ -913,13 +917,13 @@ struct zfcp_fsf_req *zfcp_fsf_abort_fcp_
 {
 	struct qdio_buffer_element *sbale;
 	struct zfcp_fsf_req *req = NULL;
-	struct zfcp_adapter *adapter = unit->port->adapter;
+	struct zfcp_qdio *qdio = unit->port->adapter->qdio;
 
-	spin_lock_bh(&adapter->req_q_lock);
-	if (zfcp_fsf_req_sbal_get(adapter))
+	spin_lock_bh(&qdio->req_q_lock);
+	if (zfcp_fsf_req_sbal_get(qdio))
 		goto out;
-	req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
-				  adapter->pool.scsi_abort);
+	req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
+				  qdio->adapter->pool.scsi_abort);
 	if (IS_ERR(req)) {
 		req = NULL;
 		goto out;
@@ -929,7 +933,7 @@ struct zfcp_fsf_req *zfcp_fsf_abort_fcp_
 		       ZFCP_STATUS_COMMON_UNBLOCKED)))
 		goto out_error_free;
 
-	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
+	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
@@ -947,7 +951,7 @@ out_error_free:
 	zfcp_fsf_req_free(req);
 	req = NULL;
 out:
-	spin_unlock_bh(&adapter->req_q_lock);
+	spin_unlock_bh(&qdio->req_q_lock);
 	return req;
 }
 
@@ -1024,7 +1028,7 @@ static int zfcp_fsf_setup_ct_els_sbals(s
 				       int max_sbals)
 {
 	struct zfcp_adapter *adapter = req->adapter;
-	struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(adapter,
+	struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(adapter->qdio,
 							       &req->queue_req);
 	u32 feat = adapter->adapter_features;
 	int bytes;
@@ -1043,7 +1047,7 @@ static int zfcp_fsf_setup_ct_els_sbals(s
 		return 0;
 	}
 
-	bytes = zfcp_qdio_sbals_from_sg(adapter, &req->queue_req,
+	bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->queue_req,
 					SBAL_FLAGS0_TYPE_WRITE_READ,
 					sg_req, max_sbals);
 	if (bytes <= 0)
@@ -1051,7 +1055,7 @@ static int zfcp_fsf_setup_ct_els_sbals(s
 	req->qtcb->bottom.support.req_buf_length = bytes;
 	req->queue_req.sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
 
-	bytes = zfcp_qdio_sbals_from_sg(adapter, &req->queue_req,
+	bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->queue_req,
 					SBAL_FLAGS0_TYPE_WRITE_READ,
 					sg_resp, max_sbals);
 	if (bytes <= 0)
@@ -1071,15 +1075,15 @@ int zfcp_fsf_send_ct(struct zfcp_send_ct
 		     struct zfcp_erp_action *erp_action)
 {
 	struct zfcp_wka_port *wka_port = ct->wka_port;
-	struct zfcp_adapter *adapter = wka_port->adapter;
+	struct zfcp_qdio *qdio = wka_port->adapter->qdio;
 	struct zfcp_fsf_req *req;
 	int ret = -EIO;
 
-	spin_lock_bh(&adapter->req_q_lock);
-	if (zfcp_fsf_req_sbal_get(adapter))
+	spin_lock_bh(&qdio->req_q_lock);
+	if (zfcp_fsf_req_sbal_get(qdio))
 		goto out;
 
-	req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC, pool);
+	req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC, pool);
 
 	if (IS_ERR(req)) {
 		ret = PTR_ERR(req);
@@ -1118,7 +1122,7 @@ failed_send:
 	if (erp_action)
 		erp_action->fsf_req = NULL;
 out:
-	spin_unlock_bh(&adapter->req_q_lock);
+	spin_unlock_bh(&qdio->req_q_lock);
 	return ret;
 }
 
@@ -1181,15 +1185,15 @@ skip_fsfstatus:
 int zfcp_fsf_send_els(struct zfcp_send_els *els)
 {
 	struct zfcp_fsf_req *req;
-	struct zfcp_adapter *adapter = els->adapter;
+	struct zfcp_qdio *qdio = els->adapter->qdio;
 	struct fsf_qtcb_bottom_support *bottom;
 	int ret = -EIO;
 
-	spin_lock_bh(&adapter->req_q_lock);
-	if (zfcp_fsf_req_sbal_get(adapter))
+	spin_lock_bh(&qdio->req_q_lock);
+	if (zfcp_fsf_req_sbal_get(qdio))
 		goto out;
 
-	req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS, NULL);
+	req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS, NULL);
 
 	if (IS_ERR(req)) {
 		ret = PTR_ERR(req);
@@ -1221,7 +1225,7 @@ int zfcp_fsf_send_els(struct zfcp_send_e
 failed_send:
 	zfcp_fsf_req_free(req);
 out:
-	spin_unlock_bh(&adapter->req_q_lock);
+	spin_unlock_bh(&qdio->req_q_lock);
 	return ret;
 }
 
@@ -1229,15 +1233,15 @@ int zfcp_fsf_exchange_config_data(struct
 {
 	struct qdio_buffer_element *sbale;
 	struct zfcp_fsf_req *req;
-	struct zfcp_adapter *adapter = erp_action->adapter;
+	struct zfcp_qdio *qdio = erp_action->adapter->qdio;
 	int retval = -EIO;
 
-	spin_lock_bh(&adapter->req_q_lock);
-	if (zfcp_fsf_req_sbal_get(adapter))
+	spin_lock_bh(&qdio->req_q_lock);
+	if (zfcp_fsf_req_sbal_get(qdio))
 		goto out;
 
-	req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
-				  adapter->pool.erp_req);
+	req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
+				  qdio->adapter->pool.erp_req);
 
 	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
@@ -1245,7 +1249,7 @@ int zfcp_fsf_exchange_config_data(struct
 	}
 
 	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
-	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
+	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
@@ -1265,29 +1269,29 @@ int zfcp_fsf_exchange_config_data(struct
 		erp_action->fsf_req = NULL;
 	}
 out:
-	spin_unlock_bh(&adapter->req_q_lock);
+	spin_unlock_bh(&qdio->req_q_lock);
 	return retval;
 }
 
-int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
+int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
 				       struct fsf_qtcb_bottom_config *data)
 {
 	struct qdio_buffer_element *sbale;
 	struct zfcp_fsf_req *req = NULL;
 	int retval = -EIO;
 
-	spin_lock_bh(&adapter->req_q_lock);
-	if (zfcp_fsf_req_sbal_get(adapter))
+	spin_lock_bh(&qdio->req_q_lock);
+	if (zfcp_fsf_req_sbal_get(qdio))
 		goto out_unlock;
 
-	req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA, NULL);
+	req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA, NULL);
 
 	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
 		goto out_unlock;
 	}
 
-	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
+	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 	req->handler = zfcp_fsf_exchange_config_data_handler;
@@ -1303,7 +1307,7 @@ int zfcp_fsf_exchange_config_data_sync(s
 
 	zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
 	retval = zfcp_fsf_req_send(req);
-	spin_unlock_bh(&adapter->req_q_lock);
+	spin_unlock_bh(&qdio->req_q_lock);
 	if (!retval)
 		wait_for_completion(&req->completion);
 
@@ -1311,7 +1315,7 @@ int zfcp_fsf_exchange_config_data_sync(s
 	return retval;
 
 out_unlock:
-	spin_unlock_bh(&adapter->req_q_lock);
+	spin_unlock_bh(&qdio->req_q_lock);
 	return retval;
 }
 
@@ -1322,20 +1326,20 @@ out_unlock:
  */
 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
 {
+	struct zfcp_qdio *qdio = erp_action->adapter->qdio;
 	struct qdio_buffer_element *sbale;
 	struct zfcp_fsf_req *req;
-	struct zfcp_adapter *adapter = erp_action->adapter;
 	int retval = -EIO;
 
-	if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
+	if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
 		return -EOPNOTSUPP;
 
-	spin_lock_bh(&adapter->req_q_lock);
-	if (zfcp_fsf_req_sbal_get(adapter))
+	spin_lock_bh(&qdio->req_q_lock);
+	if (zfcp_fsf_req_sbal_get(qdio))
 		goto out;
 
-	req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
-				  adapter->pool.erp_req);
+	req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
+				  qdio->adapter->pool.erp_req);
 
 	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
@@ -1343,7 +1347,7 @@ int zfcp_fsf_exchange_port_data(struct z
 	}
 
 	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
-	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
+	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
@@ -1358,31 +1362,31 @@ int zfcp_fsf_exchange_port_data(struct z
 		erp_action->fsf_req = NULL;
 	}
 out:
-	spin_unlock_bh(&adapter->req_q_lock);
+	spin_unlock_bh(&qdio->req_q_lock);
 	return retval;
 }
 
 /**
  * zfcp_fsf_exchange_port_data_sync - request information about local port
- * @adapter: pointer to struct zfcp_adapter
+ * @qdio: pointer to struct zfcp_qdio
  * @data: pointer to struct fsf_qtcb_bottom_port
  * Returns: 0 on success, error otherwise
  */
-int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
+int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
 				     struct fsf_qtcb_bottom_port *data)
 {
 	struct qdio_buffer_element *sbale;
 	struct zfcp_fsf_req *req = NULL;
 	int retval = -EIO;
 
-	if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
+	if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
 		return -EOPNOTSUPP;
 
-	spin_lock_bh(&adapter->req_q_lock);
-	if (zfcp_fsf_req_sbal_get(adapter))
+	spin_lock_bh(&qdio->req_q_lock);
+	if (zfcp_fsf_req_sbal_get(qdio))
 		goto out_unlock;
 
-	req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, NULL);
+	req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA, NULL);
 
 	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
@@ -1392,14 +1396,14 @@ int zfcp_fsf_exchange_port_data_sync(str
 	if (data)
 		req->data = data;
 
-	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
+	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
 	req->handler = zfcp_fsf_exchange_port_data_handler;
 	zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
 	retval = zfcp_fsf_req_send(req);
-	spin_unlock_bh(&adapter->req_q_lock);
+	spin_unlock_bh(&qdio->req_q_lock);
 
 	if (!retval)
 		wait_for_completion(&req->completion);
@@ -1409,7 +1413,7 @@ int zfcp_fsf_exchange_port_data_sync(str
 	return retval;
 
 out_unlock:
-	spin_unlock_bh(&adapter->req_q_lock);
+	spin_unlock_bh(&qdio->req_q_lock);
 	return retval;
 }
 
@@ -1495,17 +1499,17 @@ out:
 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
 {
 	struct qdio_buffer_element *sbale;
-	struct zfcp_adapter *adapter = erp_action->adapter;
-	struct zfcp_fsf_req *req;
+	struct zfcp_qdio *qdio = erp_action->adapter->qdio;
 	struct zfcp_port *port = erp_action->port;
+	struct zfcp_fsf_req *req;
 	int retval = -EIO;
 
-	spin_lock_bh(&adapter->req_q_lock);
-	if (zfcp_fsf_req_sbal_get(adapter))
+	spin_lock_bh(&qdio->req_q_lock);
+	if (zfcp_fsf_req_sbal_get(qdio))
 		goto out;
 
-	req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_PORT_WITH_DID,
-				  adapter->pool.erp_req);
+	req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
+				  qdio->adapter->pool.erp_req);
 
 	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
@@ -1513,7 +1517,7 @@ int zfcp_fsf_open_port(struct zfcp_erp_a
 	}
 
 	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
-	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
+	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
@@ -1532,7 +1536,7 @@ int zfcp_fsf_open_port(struct zfcp_erp_a
 		zfcp_port_put(port);
 	}
 out:
-	spin_unlock_bh(&adapter->req_q_lock);
+	spin_unlock_bh(&qdio->req_q_lock);
 	return retval;
 }
 
@@ -1566,16 +1570,16 @@ static void zfcp_fsf_close_port_handler(
 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
 {
 	struct qdio_buffer_element *sbale;
-	struct zfcp_adapter *adapter = erp_action->adapter;
+	struct zfcp_qdio *qdio = erp_action->adapter->qdio;
 	struct zfcp_fsf_req *req;
 	int retval = -EIO;
 
-	spin_lock_bh(&adapter->req_q_lock);
-	if (zfcp_fsf_req_sbal_get(adapter))
+	spin_lock_bh(&qdio->req_q_lock);
+	if (zfcp_fsf_req_sbal_get(qdio))
 		goto out;
 
-	req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
-				  adapter->pool.erp_req);
+	req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
+				  qdio->adapter->pool.erp_req);
 
 	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
@@ -1583,7 +1587,7 @@ int zfcp_fsf_close_port(struct zfcp_erp_
 	}
 
 	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
-	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
+	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
@@ -1600,7 +1604,7 @@ int zfcp_fsf_close_port(struct zfcp_erp_
 		erp_action->fsf_req = NULL;
 	}
 out:
-	spin_unlock_bh(&adapter->req_q_lock);
+	spin_unlock_bh(&qdio->req_q_lock);
 	return retval;
 }
 
@@ -1643,16 +1647,16 @@ out:
 int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
 {
 	struct qdio_buffer_element *sbale;
-	struct zfcp_adapter *adapter = wka_port->adapter;
+	struct zfcp_qdio *qdio = wka_port->adapter->qdio;
 	struct zfcp_fsf_req *req;
 	int retval = -EIO;
 
-	spin_lock_bh(&adapter->req_q_lock);
-	if (zfcp_fsf_req_sbal_get(adapter))
+	spin_lock_bh(&qdio->req_q_lock);
+	if (zfcp_fsf_req_sbal_get(qdio))
 		goto out;
 
-	req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_PORT_WITH_DID,
-				  adapter->pool.erp_req);
+	req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
+				  qdio->adapter->pool.erp_req);
 
 	if (unlikely(IS_ERR(req))) {
 		retval = PTR_ERR(req);
@@ -1660,7 +1664,7 @@ int zfcp_fsf_open_wka_port(struct zfcp_w
 	}
 
 	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
-	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
+	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
@@ -1673,7 +1677,7 @@ int zfcp_fsf_open_wka_port(struct zfcp_w
 	if (retval)
 		zfcp_fsf_req_free(req);
 out:
-	spin_unlock_bh(&adapter->req_q_lock);
+	spin_unlock_bh(&qdio->req_q_lock);
 	return retval;
 }
 
@@ -1698,16 +1702,16 @@ static void zfcp_fsf_close_wka_port_hand
 int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
 {
 	struct qdio_buffer_element *sbale;
-	struct zfcp_adapter *adapter = wka_port->adapter;
+	struct zfcp_qdio *qdio = wka_port->adapter->qdio;
 	struct zfcp_fsf_req *req;
 	int retval = -EIO;
 
-	spin_lock_bh(&adapter->req_q_lock);
-	if (zfcp_fsf_req_sbal_get(adapter))
+	spin_lock_bh(&qdio->req_q_lock);
+	if (zfcp_fsf_req_sbal_get(qdio))
 		goto out;
 
-	req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
-				  adapter->pool.erp_req);
+	req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
+				  qdio->adapter->pool.erp_req);
 
 	if (unlikely(IS_ERR(req))) {
 		retval = PTR_ERR(req);
@@ -1715,7 +1719,7 @@ int zfcp_fsf_close_wka_port(struct zfcp_
 	}
 
 	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
-	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
+	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
@@ -1728,7 +1732,7 @@ int zfcp_fsf_close_wka_port(struct zfcp_
 	if (retval)
 		zfcp_fsf_req_free(req);
 out:
-	spin_unlock_bh(&adapter->req_q_lock);
+	spin_unlock_bh(&qdio->req_q_lock);
 	return retval;
 }
 
@@ -1790,16 +1794,16 @@ static void zfcp_fsf_close_physical_port
 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
 {
 	struct qdio_buffer_element *sbale;
-	struct zfcp_adapter *adapter = erp_action->adapter;
+	struct zfcp_qdio *qdio = erp_action->adapter->qdio;
 	struct zfcp_fsf_req *req;
 	int retval = -EIO;
 
-	spin_lock_bh(&adapter->req_q_lock);
-	if (zfcp_fsf_req_sbal_get(adapter))
+	spin_lock_bh(&qdio->req_q_lock);
+	if (zfcp_fsf_req_sbal_get(qdio))
 		goto out;
 
-	req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT,
-				  adapter->pool.erp_req);
+	req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
+				  qdio->adapter->pool.erp_req);
 
 	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
@@ -1807,7 +1811,7 @@ int zfcp_fsf_close_physical_port(struct 
 	}
 
 	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
-	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
+	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
@@ -1824,7 +1828,7 @@ int zfcp_fsf_close_physical_port(struct 
 		erp_action->fsf_req = NULL;
 	}
 out:
-	spin_unlock_bh(&adapter->req_q_lock);
+	spin_unlock_bh(&qdio->req_q_lock);
 	return retval;
 }
 
@@ -1964,14 +1968,15 @@ int zfcp_fsf_open_unit(struct zfcp_erp_a
 {
 	struct qdio_buffer_element *sbale;
 	struct zfcp_adapter *adapter = erp_action->adapter;
+	struct zfcp_qdio *qdio = adapter->qdio;
 	struct zfcp_fsf_req *req;
 	int retval = -EIO;
 
-	spin_lock_bh(&adapter->req_q_lock);
-	if (zfcp_fsf_req_sbal_get(adapter))
+	spin_lock_bh(&qdio->req_q_lock);
+	if (zfcp_fsf_req_sbal_get(qdio))
 		goto out;
 
-	req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN,
+	req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
 				  adapter->pool.erp_req);
 
 	if (IS_ERR(req)) {
@@ -1980,7 +1985,7 @@ int zfcp_fsf_open_unit(struct zfcp_erp_a
 	}
 
 	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
-	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
+	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
@@ -2001,7 +2006,7 @@ int zfcp_fsf_open_unit(struct zfcp_erp_a
 		erp_action->fsf_req = NULL;
 	}
 out:
-	spin_unlock_bh(&adapter->req_q_lock);
+	spin_unlock_bh(&qdio->req_q_lock);
 	return retval;
 }
 
@@ -2050,16 +2055,16 @@ static void zfcp_fsf_close_unit_handler(
 int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
 {
 	struct qdio_buffer_element *sbale;
-	struct zfcp_adapter *adapter = erp_action->adapter;
+	struct zfcp_qdio *qdio = erp_action->adapter->qdio;
 	struct zfcp_fsf_req *req;
 	int retval = -EIO;
 
-	spin_lock_bh(&adapter->req_q_lock);
-	if (zfcp_fsf_req_sbal_get(adapter))
+	spin_lock_bh(&qdio->req_q_lock);
+	if (zfcp_fsf_req_sbal_get(qdio))
 		goto out;
 
-	req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
-				  adapter->pool.erp_req);
+	req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
+				  qdio->adapter->pool.erp_req);
 
 	if (IS_ERR(req)) {
 		retval = PTR_ERR(req);
@@ -2067,7 +2072,7 @@ int zfcp_fsf_close_unit(struct zfcp_erp_
 	}
 
 	req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
-	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
+	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
@@ -2085,7 +2090,7 @@ int zfcp_fsf_close_unit(struct zfcp_erp_
 		erp_action->fsf_req = NULL;
 	}
 out:
-	spin_unlock_bh(&adapter->req_q_lock);
+	spin_unlock_bh(&qdio->req_q_lock);
 	return retval;
 }
 
@@ -2353,18 +2358,19 @@ int zfcp_fsf_send_fcp_command_task(struc
 	unsigned int sbtype = SBAL_FLAGS0_TYPE_READ;
 	int real_bytes, retval = -EIO;
 	struct zfcp_adapter *adapter = unit->port->adapter;
+	struct zfcp_qdio *qdio = adapter->qdio;
 
 	if (unlikely(!(atomic_read(&unit->status) &
 		       ZFCP_STATUS_COMMON_UNBLOCKED)))
 		return -EBUSY;
 
-	spin_lock(&adapter->req_q_lock);
-	if (atomic_read(&adapter->req_q.count) <= 0) {
-		atomic_inc(&adapter->qdio_outb_full);
+	spin_lock(&qdio->req_q_lock);
+	if (atomic_read(&qdio->req_q.count) <= 0) {
+		atomic_inc(&qdio->req_q_full);
 		goto out;
 	}
 
-	req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND,
+	req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
 				  adapter->pool.scsi_req);
 
 	if (IS_ERR(req)) {
@@ -2424,7 +2430,7 @@ int zfcp_fsf_send_fcp_command_task(struc
 	req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
 		fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32);
 
-	real_bytes = zfcp_qdio_sbals_from_sg(adapter, &req->queue_req, sbtype,
+	real_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req, sbtype,
 					     scsi_sglist(scsi_cmnd),
 					     FSF_MAX_SBALS_PER_REQ);
 	if (unlikely(real_bytes < 0)) {
@@ -2453,7 +2459,7 @@ failed_scsi_cmnd:
 	zfcp_fsf_req_free(req);
 	scsi_cmnd->host_scribble = NULL;
 out:
-	spin_unlock(&adapter->req_q_lock);
+	spin_unlock(&qdio->req_q_lock);
 	return retval;
 }
 
@@ -2468,18 +2474,18 @@ struct zfcp_fsf_req *zfcp_fsf_send_fcp_c
 	struct qdio_buffer_element *sbale;
 	struct zfcp_fsf_req *req = NULL;
 	struct fcp_cmnd_iu *fcp_cmnd_iu;
-	struct zfcp_adapter *adapter = unit->port->adapter;
+	struct zfcp_qdio *qdio = unit->port->adapter->qdio;
 
 	if (unlikely(!(atomic_read(&unit->status) &
 		       ZFCP_STATUS_COMMON_UNBLOCKED)))
 		return NULL;
 
-	spin_lock_bh(&adapter->req_q_lock);
-	if (zfcp_fsf_req_sbal_get(adapter))
+	spin_lock_bh(&qdio->req_q_lock);
+	if (zfcp_fsf_req_sbal_get(qdio))
 		goto out;
 
-	req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND,
-				  adapter->pool.scsi_req);
+	req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
+				  qdio->adapter->pool.scsi_req);
 
 	if (IS_ERR(req)) {
 		req = NULL;
@@ -2496,7 +2502,7 @@ struct zfcp_fsf_req *zfcp_fsf_send_fcp_c
 	req->qtcb->bottom.io.fcp_cmnd_length = 	sizeof(struct fcp_cmnd_iu) +
 						sizeof(u32);
 
-	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
+	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
@@ -2511,7 +2517,7 @@ struct zfcp_fsf_req *zfcp_fsf_send_fcp_c
 	zfcp_fsf_req_free(req);
 	req = NULL;
 out:
-	spin_unlock_bh(&adapter->req_q_lock);
+	spin_unlock_bh(&qdio->req_q_lock);
 	return req;
 }
 
@@ -2529,6 +2535,7 @@ struct zfcp_fsf_req *zfcp_fsf_control_fi
 					   struct zfcp_fsf_cfdc *fsf_cfdc)
 {
 	struct qdio_buffer_element *sbale;
+	struct zfcp_qdio *qdio = adapter->qdio;
 	struct zfcp_fsf_req *req = NULL;
 	struct fsf_qtcb_bottom_support *bottom;
 	int direction, retval = -EIO, bytes;
@@ -2547,11 +2554,11 @@ struct zfcp_fsf_req *zfcp_fsf_control_fi
 		return ERR_PTR(-EINVAL);
 	}
 
-	spin_lock_bh(&adapter->req_q_lock);
-	if (zfcp_fsf_req_sbal_get(adapter))
+	spin_lock_bh(&qdio->req_q_lock);
+	if (zfcp_fsf_req_sbal_get(qdio))
 		goto out;
 
-	req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, NULL);
+	req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, NULL);
 	if (IS_ERR(req)) {
 		retval = -EPERM;
 		goto out;
@@ -2559,15 +2566,16 @@ struct zfcp_fsf_req *zfcp_fsf_control_fi
 
 	req->handler = zfcp_fsf_control_file_handler;
 
-	sbale = zfcp_qdio_sbale_req(adapter, &req->queue_req);
+	sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
 	sbale[0].flags |= direction;
 
 	bottom = &req->qtcb->bottom.support;
 	bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
 	bottom->option = fsf_cfdc->option;
 
-	bytes = zfcp_qdio_sbals_from_sg(adapter, &req->queue_req, direction,
-					fsf_cfdc->sg, FSF_MAX_SBALS_PER_REQ);
+	bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req,
+					direction, fsf_cfdc->sg,
+					FSF_MAX_SBALS_PER_REQ);
 	if (bytes != ZFCP_CFDC_MAX_SIZE) {
 		zfcp_fsf_req_free(req);
 		goto out;
@@ -2576,7 +2584,7 @@ struct zfcp_fsf_req *zfcp_fsf_control_fi
 	zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
 	retval = zfcp_fsf_req_send(req);
 out:
-	spin_unlock_bh(&adapter->req_q_lock);
+	spin_unlock_bh(&qdio->req_q_lock);
 
 	if (!retval) {
 		wait_for_completion(&req->completion);
@@ -2590,9 +2598,10 @@ out:
  * @adapter: pointer to struct zfcp_adapter
  * @sbal_idx: response queue index of SBAL to be processed
  */
-void zfcp_fsf_reqid_check(struct zfcp_adapter *adapter, int sbal_idx)
+void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
 {
-	struct qdio_buffer *sbal = adapter->resp_q.sbal[sbal_idx];
+	struct zfcp_adapter *adapter = qdio->adapter;
+	struct qdio_buffer *sbal = qdio->resp_q.sbal[sbal_idx];
 	struct qdio_buffer_element *sbale;
 	struct zfcp_fsf_req *fsf_req;
 	unsigned long flags, req_id;
@@ -2618,7 +2627,7 @@ void zfcp_fsf_reqid_check(struct zfcp_ad
 
 		fsf_req->queue_req.sbal_response = sbal_idx;
 		fsf_req->queue_req.qdio_inb_usage =
-			atomic_read(&adapter->resp_q.count);
+			atomic_read(&qdio->resp_q.count);
 		zfcp_fsf_req_complete(fsf_req);
 
 		if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY))
--- a/drivers/s390/scsi/zfcp_qdio.c	2009-08-12 12:36:52.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_qdio.c	2009-08-12 12:39:17.000000000 +0200
@@ -36,18 +36,18 @@ zfcp_qdio_sbale(struct zfcp_qdio_queue *
 
 /**
  * zfcp_qdio_free - free memory used by request- and resposne queue
- * @adapter: pointer to the zfcp_adapter structure
+ * @qdio: pointer to the zfcp_qdio structure
  */
-void zfcp_qdio_free(struct zfcp_adapter *adapter)
+void zfcp_qdio_free(struct zfcp_qdio *qdio)
 {
 	struct qdio_buffer **sbal_req, **sbal_resp;
 	int p;
 
-	if (adapter->ccw_device)
-		qdio_free(adapter->ccw_device);
+	if (qdio->adapter->ccw_device)
+		qdio_free(qdio->adapter->ccw_device);
 
-	sbal_req = adapter->req_q.sbal;
-	sbal_resp = adapter->resp_q.sbal;
+	sbal_req = qdio->req_q.sbal;
+	sbal_resp = qdio->resp_q.sbal;
 
 	for (p = 0; p < QDIO_MAX_BUFFERS_PER_Q; p += QBUFF_PER_PAGE) {
 		free_page((unsigned long) sbal_req[p]);
@@ -55,8 +55,10 @@ void zfcp_qdio_free(struct zfcp_adapter 
 	}
 }
 
-static void zfcp_qdio_handler_error(struct zfcp_adapter *adapter, char *id)
+static void zfcp_qdio_handler_error(struct zfcp_qdio *qdio, char *id)
 {
+	struct zfcp_adapter *adapter = qdio->adapter;
+
 	dev_warn(&adapter->ccw_device->dev, "A QDIO problem occurred\n");
 
 	zfcp_erp_adapter_reopen(adapter,
@@ -75,47 +77,47 @@ static void zfcp_qdio_zero_sbals(struct 
 }
 
 /* this needs to be called prior to updating the queue fill level */
-static void zfcp_qdio_account(struct zfcp_adapter *adapter)
+static void zfcp_qdio_account(struct zfcp_qdio *qdio)
 {
 	ktime_t now;
 	s64 span;
 	int free, used;
 
-	spin_lock(&adapter->qdio_stat_lock);
+	spin_lock(&qdio->stat_lock);
 	now = ktime_get();
-	span = ktime_us_delta(now, adapter->req_q_time);
-	free = max(0, atomic_read(&adapter->req_q.count));
+	span = ktime_us_delta(now, qdio->req_q_time);
+	free = max(0, atomic_read(&qdio->req_q.count));
 	used = QDIO_MAX_BUFFERS_PER_Q - free;
-	adapter->req_q_util += used * span;
-	adapter->req_q_time = now;
-	spin_unlock(&adapter->qdio_stat_lock);
+	qdio->req_q_util += used * span;
+	qdio->req_q_time = now;
+	spin_unlock(&qdio->stat_lock);
 }
 
 static void zfcp_qdio_int_req(struct ccw_device *cdev, unsigned int qdio_err,
 			      int queue_no, int first, int count,
 			      unsigned long parm)
 {
-	struct zfcp_adapter *adapter = (struct zfcp_adapter *) parm;
-	struct zfcp_qdio_queue *queue = &adapter->req_q;
+	struct zfcp_qdio *qdio = (struct zfcp_qdio *) parm;
+	struct zfcp_qdio_queue *queue = &qdio->req_q;
 
 	if (unlikely(qdio_err)) {
-		zfcp_hba_dbf_event_qdio(adapter, qdio_err, first, count);
-		zfcp_qdio_handler_error(adapter, "qdireq1");
+		zfcp_hba_dbf_event_qdio(qdio, qdio_err, first, count);
+		zfcp_qdio_handler_error(qdio, "qdireq1");
 		return;
 	}
 
 	/* cleanup all SBALs being program-owned now */
 	zfcp_qdio_zero_sbals(queue->sbal, first, count);
 
-	zfcp_qdio_account(adapter);
+	zfcp_qdio_account(qdio);
 	atomic_add(count, &queue->count);
-	wake_up(&adapter->request_wq);
+	wake_up(&qdio->req_q_wq);
 }
 
-static void zfcp_qdio_resp_put_back(struct zfcp_adapter *adapter, int processed)
+static void zfcp_qdio_resp_put_back(struct zfcp_qdio *qdio, int processed)
 {
-	struct zfcp_qdio_queue *queue = &adapter->resp_q;
-	struct ccw_device *cdev = adapter->ccw_device;
+	struct zfcp_qdio_queue *queue = &qdio->resp_q;
+	struct ccw_device *cdev = qdio->adapter->ccw_device;
 	u8 count, start = queue->first;
 	unsigned int retval;
 
@@ -137,12 +139,12 @@ static void zfcp_qdio_int_resp(struct cc
 			       int queue_no, int first, int count,
 			       unsigned long parm)
 {
-	struct zfcp_adapter *adapter = (struct zfcp_adapter *) parm;
+	struct zfcp_qdio *qdio = (struct zfcp_qdio *) parm;
 	int sbal_idx, sbal_no;
 
 	if (unlikely(qdio_err)) {
-		zfcp_hba_dbf_event_qdio(adapter, qdio_err, first, count);
-		zfcp_qdio_handler_error(adapter, "qdires1");
+		zfcp_hba_dbf_event_qdio(qdio, qdio_err, first, count);
+		zfcp_qdio_handler_error(qdio, "qdires1");
 		return;
 	}
 
@@ -153,26 +155,26 @@ static void zfcp_qdio_int_resp(struct cc
 	for (sbal_no = 0; sbal_no < count; sbal_no++) {
 		sbal_idx = (first + sbal_no) % QDIO_MAX_BUFFERS_PER_Q;
 		/* go through all SBALEs of SBAL */
-		zfcp_fsf_reqid_check(adapter, sbal_idx);
+		zfcp_fsf_reqid_check(qdio, sbal_idx);
 	}
 
 	/*
 	 * put range of SBALs back to response queue
 	 * (including SBALs which have already been free before)
 	 */
-	zfcp_qdio_resp_put_back(adapter, count);
+	zfcp_qdio_resp_put_back(qdio, count);
 }
 
 /**
  * zfcp_qdio_sbale_req - return ptr to SBALE of req_q for a struct zfcp_fsf_req
- * @adapter: pointer to struct zfcp_adapter
+ * @qdio: pointer to struct zfcp_qdio
  * @q_rec: pointer to struct zfcp_queue_rec
  * Returns: pointer to qdio_buffer_element (SBALE) structure
  */
-struct qdio_buffer_element *zfcp_qdio_sbale_req(struct zfcp_adapter *adapter,
+struct qdio_buffer_element *zfcp_qdio_sbale_req(struct zfcp_qdio *qdio,
 						struct zfcp_queue_req *q_req)
 {
-	return zfcp_qdio_sbale(&adapter->req_q, q_req->sbal_last, 0);
+	return zfcp_qdio_sbale(&qdio->req_q, q_req->sbal_last, 0);
 }
 
 /**
@@ -180,30 +182,30 @@ struct qdio_buffer_element *zfcp_qdio_sb
  * @fsf_req: pointer to struct fsf_req
  * Returns: pointer to qdio_buffer_element (SBALE) structure
  */
-struct qdio_buffer_element *zfcp_qdio_sbale_curr(struct zfcp_adapter *adapter,
+struct qdio_buffer_element *zfcp_qdio_sbale_curr(struct zfcp_qdio *qdio,
 						 struct zfcp_queue_req *q_req)
 {
-	return zfcp_qdio_sbale(&adapter->req_q, q_req->sbal_last,
+	return zfcp_qdio_sbale(&qdio->req_q, q_req->sbal_last,
 			       q_req->sbale_curr);
 }
 
-static void zfcp_qdio_sbal_limit(struct zfcp_adapter *adapter,
+static void zfcp_qdio_sbal_limit(struct zfcp_qdio *qdio,
 				 struct zfcp_queue_req *q_req, int max_sbals)
 {
-	int count = atomic_read(&adapter->req_q.count);
+	int count = atomic_read(&qdio->req_q.count);
 	count = min(count, max_sbals);
 	q_req->sbal_limit = (q_req->sbal_first + count - 1)
 					% QDIO_MAX_BUFFERS_PER_Q;
 }
 
 static struct qdio_buffer_element *
-zfcp_qdio_sbal_chain(struct zfcp_adapter *adapter, struct zfcp_queue_req *q_req,
+zfcp_qdio_sbal_chain(struct zfcp_qdio *qdio, struct zfcp_queue_req *q_req,
 		     unsigned long sbtype)
 {
 	struct qdio_buffer_element *sbale;
 
 	/* set last entry flag in current SBALE of current SBAL */
-	sbale = zfcp_qdio_sbale_curr(adapter, q_req);
+	sbale = zfcp_qdio_sbale_curr(qdio, q_req);
 	sbale->flags |= SBAL_FLAGS_LAST_ENTRY;
 
 	/* don't exceed last allowed SBAL */
@@ -211,7 +213,7 @@ zfcp_qdio_sbal_chain(struct zfcp_adapter
 		return NULL;
 
 	/* set chaining flag in first SBALE of current SBAL */
-	sbale = zfcp_qdio_sbale_req(adapter, q_req);
+	sbale = zfcp_qdio_sbale_req(qdio, q_req);
 	sbale->flags |= SBAL_FLAGS0_MORE_SBALS;
 
 	/* calculate index of next SBAL */
@@ -225,26 +227,26 @@ zfcp_qdio_sbal_chain(struct zfcp_adapter
 	q_req->sbale_curr = 0;
 
 	/* set storage-block type for new SBAL */
-	sbale = zfcp_qdio_sbale_curr(adapter, q_req);
+	sbale = zfcp_qdio_sbale_curr(qdio, q_req);
 	sbale->flags |= sbtype;
 
 	return sbale;
 }
 
 static struct qdio_buffer_element *
-zfcp_qdio_sbale_next(struct zfcp_adapter *adapter, struct zfcp_queue_req *q_req,
+zfcp_qdio_sbale_next(struct zfcp_qdio *qdio, struct zfcp_queue_req *q_req,
 		     unsigned int sbtype)
 {
 	if (q_req->sbale_curr == ZFCP_LAST_SBALE_PER_SBAL)
-		return zfcp_qdio_sbal_chain(adapter, q_req, sbtype);
+		return zfcp_qdio_sbal_chain(qdio, q_req, sbtype);
 	q_req->sbale_curr++;
-	return zfcp_qdio_sbale_curr(adapter, q_req);
+	return zfcp_qdio_sbale_curr(qdio, q_req);
 }
 
-static void zfcp_qdio_undo_sbals(struct zfcp_adapter *adapter,
+static void zfcp_qdio_undo_sbals(struct zfcp_qdio *qdio,
 				 struct zfcp_queue_req *q_req)
 {
-	struct qdio_buffer **sbal = adapter->req_q.sbal;
+	struct qdio_buffer **sbal = qdio->req_q.sbal;
 	int first = q_req->sbal_first;
 	int last = q_req->sbal_last;
 	int count = (last - first + QDIO_MAX_BUFFERS_PER_Q) %
@@ -252,7 +254,7 @@ static void zfcp_qdio_undo_sbals(struct 
 	zfcp_qdio_zero_sbals(sbal, first, count);
 }
 
-static int zfcp_qdio_fill_sbals(struct zfcp_adapter *adapter,
+static int zfcp_qdio_fill_sbals(struct zfcp_qdio *qdio,
 				struct zfcp_queue_req *q_req,
 				unsigned int sbtype, void *start_addr,
 				unsigned int total_length)
@@ -264,10 +266,10 @@ static int zfcp_qdio_fill_sbals(struct z
 	/* split segment up */
 	for (addr = start_addr, remaining = total_length; remaining > 0;
 	     addr += length, remaining -= length) {
-		sbale = zfcp_qdio_sbale_next(adapter, q_req, sbtype);
+		sbale = zfcp_qdio_sbale_next(qdio, q_req, sbtype);
 		if (!sbale) {
-			atomic_inc(&adapter->qdio_outb_full);
-			zfcp_qdio_undo_sbals(adapter, q_req);
+			atomic_inc(&qdio->req_q_full);
+			zfcp_qdio_undo_sbals(qdio, q_req);
 			return -EINVAL;
 		}
 
@@ -289,7 +291,7 @@ static int zfcp_qdio_fill_sbals(struct z
  * @max_sbals: upper bound for number of SBALs to be used
  * Returns: number of bytes, or error (negativ)
  */
-int zfcp_qdio_sbals_from_sg(struct zfcp_adapter *adapter,
+int zfcp_qdio_sbals_from_sg(struct zfcp_qdio *qdio,
 			    struct zfcp_queue_req *q_req,
 			    unsigned long sbtype, struct scatterlist *sg,
 			    int max_sbals)
@@ -298,14 +300,14 @@ int zfcp_qdio_sbals_from_sg(struct zfcp_
 	int retval, bytes = 0;
 
 	/* figure out last allowed SBAL */
-	zfcp_qdio_sbal_limit(adapter, q_req, max_sbals);
+	zfcp_qdio_sbal_limit(qdio, q_req, max_sbals);
 
 	/* set storage-block type for this request */
-	sbale = zfcp_qdio_sbale_req(adapter, q_req);
+	sbale = zfcp_qdio_sbale_req(qdio, q_req);
 	sbale->flags |= sbtype;
 
 	for (; sg; sg = sg_next(sg)) {
-		retval = zfcp_qdio_fill_sbals(adapter, q_req, sbtype,
+		retval = zfcp_qdio_fill_sbals(qdio, q_req, sbtype,
 					      sg_virt(sg), sg->length);
 		if (retval < 0)
 			return retval;
@@ -313,7 +315,7 @@ int zfcp_qdio_sbals_from_sg(struct zfcp_
 	}
 
 	/* assume that no other SBALEs are to follow in the same SBAL */
-	sbale = zfcp_qdio_sbale_curr(adapter, q_req);
+	sbale = zfcp_qdio_sbale_curr(qdio, q_req);
 	sbale->flags |= SBAL_FLAGS_LAST_ENTRY;
 
 	return bytes;
@@ -321,20 +323,22 @@ int zfcp_qdio_sbals_from_sg(struct zfcp_
 
 /**
  * zfcp_qdio_send - set PCI flag in first SBALE and send req to QDIO
- * @fsf_req: pointer to struct zfcp_fsf_req
+ * @qdio: pointer to struct zfcp_qdio
+ * @q_req: pointer to struct zfcp_queue_req
  * Returns: 0 on success, error otherwise
  */
-int zfcp_qdio_send(struct zfcp_adapter *adapter, struct zfcp_queue_req *q_req)
+int zfcp_qdio_send(struct zfcp_qdio *qdio, struct zfcp_queue_req *q_req)
 {
-	struct zfcp_qdio_queue *req_q = &adapter->req_q;
+	struct zfcp_qdio_queue *req_q = &qdio->req_q;
 	int first = q_req->sbal_first;
 	int count = q_req->sbal_number;
 	int retval;
 	unsigned int qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
 
-	zfcp_qdio_account(adapter);
+	zfcp_qdio_account(qdio);
 
-	retval = do_QDIO(adapter->ccw_device, qdio_flags, 0, first, count);
+	retval = do_QDIO(qdio->adapter->ccw_device, qdio_flags, 0, first,
+			 count);
 	if (unlikely(retval)) {
 		zfcp_qdio_zero_sbals(req_q->sbal, first, count);
 		return retval;
@@ -347,63 +351,69 @@ int zfcp_qdio_send(struct zfcp_adapter *
 	return 0;
 }
 
+
+static void zfcp_qdio_setup_init_data(struct qdio_initialize *id,
+				      struct zfcp_qdio *qdio)
+{
+
+	id->cdev = qdio->adapter->ccw_device;
+	id->q_format = QDIO_ZFCP_QFMT;
+	memcpy(id->adapter_name, dev_name(&id->cdev->dev), 8);
+	ASCEBC(id->adapter_name, 8);
+	id->qib_param_field_format = 0;
+	id->qib_param_field = NULL;
+	id->input_slib_elements = NULL;
+	id->output_slib_elements = NULL;
+	id->no_input_qs = 1;
+	id->no_output_qs = 1;
+	id->input_handler = zfcp_qdio_int_resp;
+	id->output_handler = zfcp_qdio_int_req;
+	id->int_parm = (unsigned long) qdio;
+	id->flags = QDIO_INBOUND_0COPY_SBALS |
+		    QDIO_OUTBOUND_0COPY_SBALS | QDIO_USE_OUTBOUND_PCIS;
+	id->input_sbal_addr_array = (void **) (qdio->resp_q.sbal);
+	id->output_sbal_addr_array = (void **) (qdio->req_q.sbal);
+
+}
 /**
  * zfcp_qdio_allocate - allocate queue memory and initialize QDIO data
  * @adapter: pointer to struct zfcp_adapter
  * Returns: -ENOMEM on memory allocation error or return value from
  *          qdio_allocate
  */
-int zfcp_qdio_allocate(struct zfcp_adapter *adapter)
+int zfcp_qdio_allocate(struct zfcp_qdio *qdio, struct ccw_device *ccw_dev)
 {
-	struct qdio_initialize *init_data;
+	struct qdio_initialize init_data;
 
-	if (zfcp_qdio_buffers_enqueue(adapter->req_q.sbal) ||
-		   zfcp_qdio_buffers_enqueue(adapter->resp_q.sbal))
+	if (zfcp_qdio_buffers_enqueue(qdio->req_q.sbal) ||
+	    zfcp_qdio_buffers_enqueue(qdio->resp_q.sbal))
 		return -ENOMEM;
 
-	init_data = &adapter->qdio_init_data;
-
-	init_data->cdev = adapter->ccw_device;
-	init_data->q_format = QDIO_ZFCP_QFMT;
-	memcpy(init_data->adapter_name, dev_name(&adapter->ccw_device->dev), 8);
-	ASCEBC(init_data->adapter_name, 8);
-	init_data->qib_param_field_format = 0;
-	init_data->qib_param_field = NULL;
-	init_data->input_slib_elements = NULL;
-	init_data->output_slib_elements = NULL;
-	init_data->no_input_qs = 1;
-	init_data->no_output_qs = 1;
-	init_data->input_handler = zfcp_qdio_int_resp;
-	init_data->output_handler = zfcp_qdio_int_req;
-	init_data->int_parm = (unsigned long) adapter;
-	init_data->flags = QDIO_INBOUND_0COPY_SBALS |
-			QDIO_OUTBOUND_0COPY_SBALS | QDIO_USE_OUTBOUND_PCIS;
-	init_data->input_sbal_addr_array =
-			(void **) (adapter->resp_q.sbal);
-	init_data->output_sbal_addr_array =
-			(void **) (adapter->req_q.sbal);
+	zfcp_qdio_setup_init_data(&init_data, qdio);
 
-	return qdio_allocate(init_data);
+	return qdio_allocate(&init_data);
 }
 
 /**
  * zfcp_close_qdio - close qdio queues for an adapter
+ * @qdio: pointer to structure zfcp_qdio
  */
-void zfcp_qdio_close(struct zfcp_adapter *adapter)
+void zfcp_qdio_close(struct zfcp_qdio *qdio)
 {
 	struct zfcp_qdio_queue *req_q;
 	int first, count;
 
-	if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP))
+	if (!(atomic_read(&qdio->adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP))
 		return;
 
 	/* clear QDIOUP flag, thus do_QDIO is not called during qdio_shutdown */
-	req_q = &adapter->req_q;
-	spin_lock_bh(&adapter->req_q_lock);
-	atomic_clear_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status);
-	spin_unlock_bh(&adapter->req_q_lock);
+	req_q = &qdio->req_q;
+	spin_lock_bh(&qdio->req_q_lock);
+	atomic_clear_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &qdio->adapter->status);
+	spin_unlock_bh(&qdio->req_q_lock);
 
-	qdio_shutdown(adapter->ccw_device, QDIO_FLAG_CLEANUP_USING_CLEAR);
+	qdio_shutdown(qdio->adapter->ccw_device,
+		      QDIO_FLAG_CLEANUP_USING_CLEAR);
 
 	/* cleanup used outbound sbals */
 	count = atomic_read(&req_q->count);
@@ -414,50 +424,54 @@ void zfcp_qdio_close(struct zfcp_adapter
 	}
 	req_q->first = 0;
 	atomic_set(&req_q->count, 0);
-	adapter->resp_q.first = 0;
-	atomic_set(&adapter->resp_q.count, 0);
+	qdio->resp_q.first = 0;
+	atomic_set(&qdio->resp_q.count, 0);
 }
 
 /**
  * zfcp_qdio_open - prepare and initialize response queue
- * @adapter: pointer to struct zfcp_adapter
+ * @qdio: pointer to struct zfcp_qdio
  * Returns: 0 on success, otherwise -EIO
  */
-int zfcp_qdio_open(struct zfcp_adapter *adapter)
+int zfcp_qdio_open(struct zfcp_qdio *qdio)
 {
 	struct qdio_buffer_element *sbale;
+	struct qdio_initialize init_data;
+	struct ccw_device *cdev = qdio->adapter->ccw_device;
 	int cc;
 
-	if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)
+	if (atomic_read(&qdio->adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)
 		return -EIO;
 
-	if (qdio_establish(&adapter->qdio_init_data))
+	zfcp_qdio_setup_init_data(&init_data, qdio);
+
+	if (qdio_establish(&init_data))
 		goto failed_establish;
 
-	if (qdio_activate(adapter->ccw_device))
+	if (qdio_activate(cdev))
 		goto failed_qdio;
 
 	for (cc = 0; cc < QDIO_MAX_BUFFERS_PER_Q; cc++) {
-		sbale = &(adapter->resp_q.sbal[cc]->element[0]);
+		sbale = &(qdio->resp_q.sbal[cc]->element[0]);
 		sbale->length = 0;
 		sbale->flags = SBAL_FLAGS_LAST_ENTRY;
 		sbale->addr = NULL;
 	}
 
-	if (do_QDIO(adapter->ccw_device, QDIO_FLAG_SYNC_INPUT, 0, 0,
+	if (do_QDIO(cdev, QDIO_FLAG_SYNC_INPUT, 0, 0,
 		     QDIO_MAX_BUFFERS_PER_Q))
 		goto failed_qdio;
 
 	/* set index of first avalable SBALS / number of available SBALS */
-	adapter->req_q.first = 0;
-	atomic_set(&adapter->req_q.count, QDIO_MAX_BUFFERS_PER_Q);
+	qdio->req_q.first = 0;
+	atomic_set(&qdio->req_q.count, QDIO_MAX_BUFFERS_PER_Q);
 
 	return 0;
 
 failed_qdio:
-	qdio_shutdown(adapter->ccw_device, QDIO_FLAG_CLEANUP_USING_CLEAR);
+	qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
 failed_establish:
-	dev_err(&adapter->ccw_device->dev,
+	dev_err(&cdev->dev,
 		"Setting up the QDIO connection to the FCP adapter failed\n");
 	return -EIO;
 }
--- a/drivers/s390/scsi/zfcp_scsi.c	2009-08-12 12:36:52.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_scsi.c	2009-08-12 12:37:22.000000000 +0200
@@ -225,7 +225,7 @@ static int zfcp_task_mgmt_function(struc
 {
 	struct zfcp_unit *unit = scpnt->device->hostdata;
 	struct zfcp_adapter *adapter = unit->port->adapter;
-	struct zfcp_fsf_req *fsf_req;
+	struct zfcp_fsf_req *fsf_req = NULL;
 	int retval = SUCCESS;
 	int retry = 3;
 
@@ -429,7 +429,7 @@ static struct fc_host_statistics *zfcp_g
 	if (!data)
 		return NULL;
 
-	ret = zfcp_fsf_exchange_port_data_sync(adapter, data);
+	ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
 	if (ret) {
 		kfree(data);
 		return NULL;
@@ -458,7 +458,7 @@ static void zfcp_reset_fc_host_stats(str
 	if (!data)
 		return;
 
-	ret = zfcp_fsf_exchange_port_data_sync(adapter, data);
+	ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
 	if (ret)
 		kfree(data);
 	else {
--- a/drivers/s390/scsi/zfcp_sysfs.c	2009-08-12 12:36:52.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_sysfs.c	2009-08-12 12:37:22.000000000 +0200
@@ -425,7 +425,7 @@ static ssize_t zfcp_sysfs_adapter_util_s
 	if (!qtcb_port)
 		return -ENOMEM;
 
-	retval = zfcp_fsf_exchange_port_data_sync(adapter, qtcb_port);
+	retval = zfcp_fsf_exchange_port_data_sync(adapter->qdio, qtcb_port);
 	if (!retval)
 		retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util,
 				 qtcb_port->cb_util, qtcb_port->a_util);
@@ -451,7 +451,7 @@ static int zfcp_sysfs_adapter_ex_config(
 	if (!qtcb_config)
 		return -ENOMEM;
 
-	retval = zfcp_fsf_exchange_config_data_sync(adapter, qtcb_config);
+	retval = zfcp_fsf_exchange_config_data_sync(adapter->qdio, qtcb_config);
 	if (!retval)
 		*stat_inf = qtcb_config->stat_info;
 
@@ -492,15 +492,15 @@ static ssize_t zfcp_sysfs_adapter_q_full
 					      char *buf)
 {
 	struct Scsi_Host *scsi_host = class_to_shost(dev);
-	struct zfcp_adapter *adapter =
-		(struct zfcp_adapter *) scsi_host->hostdata[0];
+	struct zfcp_qdio *qdio =
+		((struct zfcp_adapter *) scsi_host->hostdata[0])->qdio;
 	u64 util;
 
-	spin_lock_bh(&adapter->qdio_stat_lock);
-	util = adapter->req_q_util;
-	spin_unlock_bh(&adapter->qdio_stat_lock);
+	spin_lock_bh(&qdio->stat_lock);
+	util = qdio->req_q_util;
+	spin_unlock_bh(&qdio->stat_lock);
 
-	return sprintf(buf, "%d %llu\n", atomic_read(&adapter->qdio_outb_full),
+	return sprintf(buf, "%d %llu\n", atomic_read(&qdio->req_q_full),
 		       (unsigned long long)util);
 }
 static DEVICE_ATTR(queue_full, S_IRUGO, zfcp_sysfs_adapter_q_full_show, NULL);

[patch 15/27] zfcp: Decouple gid_pn requests from erp

[Christof Schmitt]

[-- Attachment #1: 716.diff --]
[-- Type: text/plain, Size: 10033 bytes --]

From: Christof Schmitt <christof.schmitt@de.ibm.com>

Don't let the erp wait for gid_pn requests to complete. Instead, queue
the gid_pn work, exit erp and let the finished gid_pn work trigger a
new port reopen.

Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
--- a/drivers/s390/scsi/zfcp_aux.c	2009-08-18 14:19:59.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_aux.c	2009-08-18 14:19:59.000000000 +0200
@@ -362,6 +362,11 @@ static int zfcp_allocate_low_mem_buffers
 	if (!adapter->pool.erp_req)
 		return -ENOMEM;
 
+	adapter->pool.gid_pn_req =
+		mempool_create_kmalloc_pool(1, sizeof(struct zfcp_fsf_req));
+	if (!adapter->pool.gid_pn_req)
+		return -ENOMEM;
+
 	adapter->pool.scsi_req =
 		mempool_create_kmalloc_pool(1, sizeof(struct zfcp_fsf_req));
 	if (!adapter->pool.scsi_req)
@@ -379,7 +384,7 @@ static int zfcp_allocate_low_mem_buffers
 		return -ENOMEM;
 
 	adapter->pool.qtcb_pool =
-		mempool_create_slab_pool(3, zfcp_data.qtcb_cache);
+		mempool_create_slab_pool(4, zfcp_data.qtcb_cache);
 	if (!adapter->pool.qtcb_pool)
 		return -ENOMEM;
 
@@ -652,7 +657,7 @@ struct zfcp_port *zfcp_port_enqueue(stru
 
 	init_waitqueue_head(&port->remove_wq);
 	INIT_LIST_HEAD(&port->unit_list_head);
-	INIT_WORK(&port->gid_pn_work, zfcp_erp_port_strategy_open_lookup);
+	INIT_WORK(&port->gid_pn_work, zfcp_fc_port_did_lookup);
 	INIT_WORK(&port->test_link_work, zfcp_fc_link_test_work);
 	INIT_WORK(&port->rport_work, zfcp_scsi_rport_work);
 
--- a/drivers/s390/scsi/zfcp_def.h	2009-08-18 14:19:59.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_def.h	2009-08-18 14:19:59.000000000 +0200
@@ -265,6 +265,7 @@ struct zfcp_fsf_req;
 /* holds various memory pools of an adapter */
 struct zfcp_adapter_mempool {
 	mempool_t *erp_req;
+	mempool_t *gid_pn_req;
 	mempool_t *scsi_req;
 	mempool_t *scsi_abort;
 	mempool_t *status_read_req;
--- a/drivers/s390/scsi/zfcp_erp.c	2009-08-18 14:19:59.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_erp.c	2009-08-18 14:19:59.000000000 +0200
@@ -26,7 +26,6 @@ enum zfcp_erp_steps {
 	ZFCP_ERP_STEP_FSF_XCONFIG	= 0x0001,
 	ZFCP_ERP_STEP_PHYS_PORT_CLOSING	= 0x0010,
 	ZFCP_ERP_STEP_PORT_CLOSING	= 0x0100,
-	ZFCP_ERP_STEP_NAMESERVER_LOOKUP	= 0x0400,
 	ZFCP_ERP_STEP_PORT_OPENING	= 0x0800,
 	ZFCP_ERP_STEP_UNIT_CLOSING	= 0x1000,
 	ZFCP_ERP_STEP_UNIT_OPENING	= 0x2000,
@@ -842,27 +841,6 @@ static int zfcp_erp_open_ptp_port(struct
 	return zfcp_erp_port_strategy_open_port(act);
 }
 
-void zfcp_erp_port_strategy_open_lookup(struct work_struct *work)
-{
-	int retval;
-	struct zfcp_port *port = container_of(work, struct zfcp_port,
-					      gid_pn_work);
-
-	retval = zfcp_fc_ns_gid_pn(&port->erp_action);
-	if (!retval) {
-		port->erp_action.step = ZFCP_ERP_STEP_NAMESERVER_LOOKUP;
-		goto out;
-	}
-	if (retval == -ENOMEM) {
-		zfcp_erp_notify(&port->erp_action, ZFCP_STATUS_ERP_LOWMEM);
-		goto out;
-	}
-	/* all other error condtions */
-	zfcp_erp_notify(&port->erp_action, 0);
-out:
-	zfcp_port_put(port);
-}
-
 static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *act)
 {
 	struct zfcp_adapter *adapter = act->adapter;
@@ -880,12 +858,8 @@ static int zfcp_erp_port_strategy_open_c
 			if (!queue_work(adapter->work_queue,
 					&port->gid_pn_work))
 				zfcp_port_put(port);
-			return ZFCP_ERP_CONTINUES;
+			return ZFCP_ERP_EXIT;
 		}
-		/* fall through */
-	case ZFCP_ERP_STEP_NAMESERVER_LOOKUP:
-		if (!port->d_id)
-			return ZFCP_ERP_FAILED;
 		return zfcp_erp_port_strategy_open_port(act);
 
 	case ZFCP_ERP_STEP_PORT_OPENING:
--- a/drivers/s390/scsi/zfcp_ext.h	2009-08-18 14:19:59.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_ext.h	2009-08-18 14:19:59.000000000 +0200
@@ -94,13 +94,12 @@ extern void zfcp_erp_unit_access_denied(
 extern void zfcp_erp_adapter_access_changed(struct zfcp_adapter *, char *,
 					    void *);
 extern void zfcp_erp_timeout_handler(unsigned long);
-extern void zfcp_erp_port_strategy_open_lookup(struct work_struct *);
 
 /* zfcp_fc.c */
 extern int zfcp_scan_ports(struct zfcp_adapter *);
 extern void _zfcp_scan_ports_later(struct work_struct *);
 extern void zfcp_fc_incoming_els(struct zfcp_fsf_req *);
-extern int zfcp_fc_ns_gid_pn(struct zfcp_erp_action *);
+extern void zfcp_fc_port_did_lookup(struct work_struct *);
 extern void zfcp_fc_plogi_evaluate(struct zfcp_port *, struct fsf_plogi *);
 extern void zfcp_test_link(struct zfcp_port *);
 extern void zfcp_fc_link_test_work(struct work_struct *);
@@ -128,8 +127,7 @@ extern struct zfcp_fsf_req *zfcp_fsf_con
 extern void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *);
 extern int zfcp_fsf_status_read(struct zfcp_qdio *);
 extern int zfcp_status_read_refill(struct zfcp_adapter *adapter);
-extern int zfcp_fsf_send_ct(struct zfcp_send_ct *, mempool_t *,
-			    struct zfcp_erp_action *);
+extern int zfcp_fsf_send_ct(struct zfcp_send_ct *, mempool_t *);
 extern int zfcp_fsf_send_els(struct zfcp_send_els *);
 extern int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *,
 					  struct scsi_cmnd *);
--- a/drivers/s390/scsi/zfcp_fc.c	2009-08-18 14:19:59.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fc.c	2009-08-18 14:19:59.000000000 +0200
@@ -282,15 +282,15 @@ static void zfcp_fc_ns_gid_pn_eval(unsig
 	port->d_id = ct_iu_resp->d_id & ZFCP_DID_MASK;
 }
 
-int static zfcp_fc_ns_gid_pn_request(struct zfcp_erp_action *erp_action,
+static int zfcp_fc_ns_gid_pn_request(struct zfcp_port *port,
 				     struct zfcp_gid_pn_data *gid_pn)
 {
-	struct zfcp_adapter *adapter = erp_action->adapter;
+	struct zfcp_adapter *adapter = port->adapter;
 	struct zfcp_fc_ns_handler_data compl_rec;
 	int ret;
 
 	/* setup parameters for send generic command */
-	gid_pn->port = erp_action->port;
+	gid_pn->port = port;
 	gid_pn->ct.wka_port = &adapter->gs->ds;
 	gid_pn->ct.handler = zfcp_fc_ns_handler;
 	gid_pn->ct.handler_data = (unsigned long) &compl_rec;
@@ -309,12 +309,12 @@ int static zfcp_fc_ns_gid_pn_request(str
 	gid_pn->ct_iu_req.header.options = ZFCP_CT_SYNCHRONOUS;
 	gid_pn->ct_iu_req.header.cmd_rsp_code = ZFCP_CT_GID_PN;
 	gid_pn->ct_iu_req.header.max_res_size = ZFCP_CT_SIZE_ONE_PAGE / 4;
-	gid_pn->ct_iu_req.wwpn = erp_action->port->wwpn;
+	gid_pn->ct_iu_req.wwpn = port->wwpn;
 
 	init_completion(&compl_rec.done);
 	compl_rec.handler = zfcp_fc_ns_gid_pn_eval;
 	compl_rec.handler_data = (unsigned long) gid_pn;
-	ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.erp_req, erp_action);
+	ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.gid_pn_req);
 	if (!ret)
 		wait_for_completion(&compl_rec.done);
 	return ret;
@@ -322,14 +322,14 @@ int static zfcp_fc_ns_gid_pn_request(str
 
 /**
  * zfcp_fc_ns_gid_pn_request - initiate GID_PN nameserver request
- * @erp_action: pointer to zfcp_erp_action where GID_PN request is needed
+ * @port: port where GID_PN request is needed
  * return: -ENOMEM on error, 0 otherwise
  */
-int zfcp_fc_ns_gid_pn(struct zfcp_erp_action *erp_action)
+static int zfcp_fc_ns_gid_pn(struct zfcp_port *port)
 {
 	int ret;
 	struct zfcp_gid_pn_data *gid_pn;
-	struct zfcp_adapter *adapter = erp_action->adapter;
+	struct zfcp_adapter *adapter = port->adapter;
 
 	gid_pn = mempool_alloc(adapter->pool.gid_pn_data, GFP_ATOMIC);
 	if (!gid_pn)
@@ -341,7 +341,7 @@ int zfcp_fc_ns_gid_pn(struct zfcp_erp_ac
 	if (ret)
 		goto out;
 
-	ret = zfcp_fc_ns_gid_pn_request(erp_action, gid_pn);
+	ret = zfcp_fc_ns_gid_pn_request(port, gid_pn);
 
 	zfcp_wka_port_put(&adapter->gs->ds);
 out:
@@ -349,6 +349,29 @@ out:
 	return ret;
 }
 
+void zfcp_fc_port_did_lookup(struct work_struct *work)
+{
+	int ret;
+	struct zfcp_port *port = container_of(work, struct zfcp_port,
+					      gid_pn_work);
+
+	ret = zfcp_fc_ns_gid_pn(port);
+	if (ret) {
+		/* could not issue gid_pn for some reason */
+		zfcp_erp_adapter_reopen(port->adapter, 0, "fcgpn_1", NULL);
+		goto out;
+	}
+
+	if (!port->d_id) {
+		zfcp_erp_port_failed(port, "fcgpn_2", NULL);
+		goto out;
+	}
+
+	zfcp_erp_port_reopen(port, 0, "fcgpn_3", NULL);
+out:
+	zfcp_port_put(port);
+}
+
 /**
  * zfcp_fc_plogi_evaluate - evaluate PLOGI playload
  * @port: zfcp_port structure
@@ -551,7 +574,7 @@ static int zfcp_scan_issue_gpn_ft(struct
 
 	init_completion(&compl_rec.done);
 	compl_rec.handler = NULL;
-	ret = zfcp_fsf_send_ct(ct, NULL, NULL);
+	ret = zfcp_fsf_send_ct(ct, NULL);
 	if (!ret)
 		wait_for_completion(&compl_rec.done);
 	return ret;
@@ -840,7 +863,7 @@ int zfcp_fc_execute_ct_fc_job(struct fc_
 	ct_fc_job->ct.completion = NULL;
 	ct_fc_job->job = job;
 
-	ret = zfcp_fsf_send_ct(&ct_fc_job->ct, NULL, NULL);
+	ret = zfcp_fsf_send_ct(&ct_fc_job->ct, NULL);
 	if (ret) {
 		kfree(ct_fc_job);
 		zfcp_wka_port_put(ct_fc_job->ct.wka_port);
--- a/drivers/s390/scsi/zfcp_fsf.c	2009-08-18 14:19:59.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fsf.c	2009-08-18 14:19:59.000000000 +0200
@@ -1069,10 +1069,8 @@ static int zfcp_fsf_setup_ct_els_sbals(s
  * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
  * @ct: pointer to struct zfcp_send_ct with data for request
  * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
- * @erp_action: if non-null the Generic Service request sent within ERP
  */
-int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
-		     struct zfcp_erp_action *erp_action)
+int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool)
 {
 	struct zfcp_wka_port *wka_port = ct->wka_port;
 	struct zfcp_qdio *qdio = wka_port->adapter->qdio;
@@ -1103,13 +1101,7 @@ int zfcp_fsf_send_ct(struct zfcp_send_ct
 	req->data = ct;
 
 	zfcp_san_dbf_event_ct_request(req);
-
-	if (erp_action) {
-		erp_action->fsf_req = req;
-		req->erp_action = erp_action;
-		zfcp_fsf_start_erp_timer(req);
-	} else
-		zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
+	zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
 
 	ret = zfcp_fsf_req_send(req);
 	if (ret)
@@ -1119,8 +1111,6 @@ int zfcp_fsf_send_ct(struct zfcp_send_ct
 
 failed_send:
 	zfcp_fsf_req_free(req);
-	if (erp_action)
-		erp_action->fsf_req = NULL;
 out:
 	spin_unlock_bh(&qdio->req_q_lock);
 	return ret;

[patch 16/27] zfcp: Update dbf calls

[Christof Schmitt]

[-- Attachment #1: 717-zfcp-structure-cleanup-2.diff --]
[-- Type: text/plain, Size: 63359 bytes --]

From: Swen Schillig <swen@vnet.ibm.com>

Change the dbf data and functions to use the zfcp_dbf prefix
throughout the code. Also change the calls to dbf to use zfcp_dbf
instead of zfcp_adapter.

Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---

 drivers/s390/scsi/zfcp_aux.c  |    7 
 drivers/s390/scsi/zfcp_dbf.c  |  408 +++++++++++++++++++-----------------------
 drivers/s390/scsi/zfcp_dbf.h  |  152 +++++++--------
 drivers/s390/scsi/zfcp_erp.c  |   49 ++---
 drivers/s390/scsi/zfcp_ext.h  |   52 ++---
 drivers/s390/scsi/zfcp_fc.c   |    2 
 drivers/s390/scsi/zfcp_fsf.c  |   24 +-
 drivers/s390/scsi/zfcp_qdio.c |    6 
 drivers/s390/scsi/zfcp_scsi.c |   27 +-
 9 files changed, 347 insertions(+), 380 deletions(-)

--- a/drivers/s390/scsi/zfcp_aux.c	2009-08-17 13:26:27.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_aux.c	2009-08-17 13:26:55.000000000 +0200
@@ -517,6 +517,7 @@ int zfcp_adapter_enqueue(struct ccw_devi
 		goto qdio_mem_failed;
 
 	adapter->qdio->adapter = adapter;
+
 	ccw_device->handler = NULL;
 	adapter->ccw_device = ccw_device;
 	atomic_set(&adapter->refcount, 0);
@@ -530,7 +531,7 @@ int zfcp_adapter_enqueue(struct ccw_devi
 	if (zfcp_reqlist_alloc(adapter))
 		goto failed_low_mem_buffers;
 
-	if (zfcp_adapter_debug_register(adapter))
+	if (zfcp_dbf_adapter_register(adapter))
 		goto debug_register_failed;
 
 	if (zfcp_setup_adapter_work_queue(adapter))
@@ -577,7 +578,7 @@ int zfcp_adapter_enqueue(struct ccw_devi
 sysfs_failed:
 	zfcp_destroy_adapter_work_queue(adapter);
 work_queue_failed:
-	zfcp_adapter_debug_unregister(adapter);
+	zfcp_dbf_adapter_unregister(adapter->dbf);
 debug_register_failed:
 	dev_set_drvdata(&ccw_device->dev, NULL);
 	kfree(adapter->req_list);
@@ -616,7 +617,7 @@ void zfcp_adapter_dequeue(struct zfcp_ad
 		return;
 
 	zfcp_destroy_adapter_work_queue(adapter);
-	zfcp_adapter_debug_unregister(adapter);
+	zfcp_dbf_adapter_unregister(adapter->dbf);
 	zfcp_qdio_free(adapter->qdio);
 	zfcp_free_low_mem_buffers(adapter);
 	kfree(adapter->req_list);
--- a/drivers/s390/scsi/zfcp_dbf.c	2009-08-17 13:26:27.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_dbf.c	2009-08-17 13:27:45.000000000 +0200
@@ -120,9 +120,9 @@ static int zfcp_dbf_view_header(debug_in
 	return p - out_buf;
 }
 
-void _zfcp_hba_dbf_event_fsf_response(const char *tag2, int level,
-				      struct zfcp_fsf_req *fsf_req,
-				      struct zfcp_dbf *dbf)
+void _zfcp_dbf_hba_fsf_response(const char *tag2, int level,
+				struct zfcp_fsf_req *fsf_req,
+				struct zfcp_dbf *dbf)
 {
 	struct fsf_qtcb *qtcb = fsf_req->qtcb;
 	union fsf_prot_status_qual *prot_status_qual =
@@ -132,11 +132,11 @@ void _zfcp_hba_dbf_event_fsf_response(co
 	struct zfcp_port *port;
 	struct zfcp_unit *unit;
 	struct zfcp_send_els *send_els;
-	struct zfcp_hba_dbf_record *rec = &dbf->hba_dbf_buf;
-	struct zfcp_hba_dbf_record_response *response = &rec->u.response;
+	struct zfcp_dbf_hba_record *rec = &dbf->hba_buf;
+	struct zfcp_dbf_hba_record_response *response = &rec->u.response;
 	unsigned long flags;
 
-	spin_lock_irqsave(&dbf->hba_dbf_lock, flags);
+	spin_lock_irqsave(&dbf->hba_lock, flags);
 	memset(rec, 0, sizeof(*rec));
 	strncpy(rec->tag, "resp", ZFCP_DBF_TAG_SIZE);
 	strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
@@ -203,7 +203,7 @@ void _zfcp_hba_dbf_event_fsf_response(co
 		break;
 	}
 
-	debug_event(dbf->hba_dbf, level, rec, sizeof(*rec));
+	debug_event(dbf->hba, level, rec, sizeof(*rec));
 
 	/* have fcp channel microcode fixed to use as little as possible */
 	if (fsf_req->fsf_command != FSF_QTCB_FCP_CMND) {
@@ -211,27 +211,25 @@ void _zfcp_hba_dbf_event_fsf_response(co
 		char *buf = (char *)qtcb + qtcb->header.log_start;
 		int len = qtcb->header.log_length;
 		for (; len && !buf[len - 1]; len--);
-		zfcp_dbf_hexdump(dbf->hba_dbf, rec, sizeof(*rec), level, buf,
+		zfcp_dbf_hexdump(dbf->hba, rec, sizeof(*rec), level, buf,
 				 len);
 	}
 
-	spin_unlock_irqrestore(&dbf->hba_dbf_lock, flags);
+	spin_unlock_irqrestore(&dbf->hba_lock, flags);
 }
 
-void _zfcp_hba_dbf_event_fsf_unsol(const char *tag, int level,
-				   struct zfcp_adapter *adapter,
-				   struct fsf_status_read_buffer *status_buffer)
+void _zfcp_dbf_hba_fsf_unsol(const char *tag, int level, struct zfcp_dbf *dbf,
+			     struct fsf_status_read_buffer *status_buffer)
 {
-	struct zfcp_dbf *dbf = adapter->dbf;
-	struct zfcp_hba_dbf_record *rec = &dbf->hba_dbf_buf;
+	struct zfcp_dbf_hba_record *rec = &dbf->hba_buf;
 	unsigned long flags;
 
-	spin_lock_irqsave(&dbf->hba_dbf_lock, flags);
+	spin_lock_irqsave(&dbf->hba_lock, flags);
 	memset(rec, 0, sizeof(*rec));
 	strncpy(rec->tag, "stat", ZFCP_DBF_TAG_SIZE);
 	strncpy(rec->tag2, tag, ZFCP_DBF_TAG_SIZE);
 
-	rec->u.status.failed = atomic_read(&adapter->stat_miss);
+	rec->u.status.failed = atomic_read(&dbf->adapter->stat_miss);
 	if (status_buffer != NULL) {
 		rec->u.status.status_type = status_buffer->status_type;
 		rec->u.status.status_subtype = status_buffer->status_subtype;
@@ -268,58 +266,54 @@ void _zfcp_hba_dbf_event_fsf_unsol(const
 		       &status_buffer->payload, rec->u.status.payload_size);
 	}
 
-	debug_event(dbf->hba_dbf, level, rec, sizeof(*rec));
-	spin_unlock_irqrestore(&dbf->hba_dbf_lock, flags);
+	debug_event(dbf->hba, level, rec, sizeof(*rec));
+	spin_unlock_irqrestore(&dbf->hba_lock, flags);
 }
 
 /**
- * zfcp_hba_dbf_event_qdio - trace event for QDIO related failure
+ * zfcp_dbf_hba_qdio - trace event for QDIO related failure
  * @qdio: qdio structure affected by this QDIO related event
  * @qdio_error: as passed by qdio module
  * @sbal_index: first buffer with error condition, as passed by qdio module
  * @sbal_count: number of buffers affected, as passed by qdio module
  */
-void zfcp_hba_dbf_event_qdio(struct zfcp_qdio *qdio,
-			     unsigned int qdio_error, int sbal_index,
-			     int sbal_count)
+void zfcp_dbf_hba_qdio(struct zfcp_dbf *dbf, unsigned int qdio_error,
+		       int sbal_index, int sbal_count)
 {
-	struct zfcp_dbf *dbf = qdio->adapter->dbf;
-	struct zfcp_hba_dbf_record *r = &dbf->hba_dbf_buf;
+	struct zfcp_dbf_hba_record *r = &dbf->hba_buf;
 	unsigned long flags;
 
-	spin_lock_irqsave(&dbf->hba_dbf_lock, flags);
+	spin_lock_irqsave(&dbf->hba_lock, flags);
 	memset(r, 0, sizeof(*r));
 	strncpy(r->tag, "qdio", ZFCP_DBF_TAG_SIZE);
 	r->u.qdio.qdio_error = qdio_error;
 	r->u.qdio.sbal_index = sbal_index;
 	r->u.qdio.sbal_count = sbal_count;
-	debug_event(dbf->hba_dbf, 0, r, sizeof(*r));
-	spin_unlock_irqrestore(&dbf->hba_dbf_lock, flags);
+	debug_event(dbf->hba, 0, r, sizeof(*r));
+	spin_unlock_irqrestore(&dbf->hba_lock, flags);
 }
 
 /**
- * zfcp_hba_dbf_event_berr - trace event for bit error threshold
- * @adapter: adapter affected by this QDIO related event
+ * zfcp_dbf_hba_berr - trace event for bit error threshold
+ * @dbf: dbf structure affected by this QDIO related event
  * @req: fsf request
  */
-void zfcp_hba_dbf_event_berr(struct zfcp_adapter *adapter,
-			     struct zfcp_fsf_req *req)
+void zfcp_dbf_hba_berr(struct zfcp_dbf *dbf, struct zfcp_fsf_req *req)
 {
-	struct zfcp_dbf *dbf = adapter->dbf;
-	struct zfcp_hba_dbf_record *r = &dbf->hba_dbf_buf;
+	struct zfcp_dbf_hba_record *r = &dbf->hba_buf;
 	struct fsf_status_read_buffer *sr_buf = req->data;
 	struct fsf_bit_error_payload *err = &sr_buf->payload.bit_error;
 	unsigned long flags;
 
-	spin_lock_irqsave(&dbf->hba_dbf_lock, flags);
+	spin_lock_irqsave(&dbf->hba_lock, flags);
 	memset(r, 0, sizeof(*r));
 	strncpy(r->tag, "berr", ZFCP_DBF_TAG_SIZE);
 	memcpy(&r->u.berr, err, sizeof(struct fsf_bit_error_payload));
-	debug_event(dbf->hba_dbf, 0, r, sizeof(*r));
-	spin_unlock_irqrestore(&dbf->hba_dbf_lock, flags);
+	debug_event(dbf->hba, 0, r, sizeof(*r));
+	spin_unlock_irqrestore(&dbf->hba_lock, flags);
 }
-static void zfcp_hba_dbf_view_response(char **p,
-				       struct zfcp_hba_dbf_record_response *r)
+static void zfcp_dbf_hba_view_response(char **p,
+				       struct zfcp_dbf_hba_record_response *r)
 {
 	struct timespec t;
 
@@ -380,8 +374,8 @@ static void zfcp_hba_dbf_view_response(c
 	}
 }
 
-static void zfcp_hba_dbf_view_status(char **p,
-				     struct zfcp_hba_dbf_record_status *r)
+static void zfcp_dbf_hba_view_status(char **p,
+				     struct zfcp_dbf_hba_record_status *r)
 {
 	zfcp_dbf_out(p, "failed", "0x%02x", r->failed);
 	zfcp_dbf_out(p, "status_type", "0x%08x", r->status_type);
@@ -393,14 +387,14 @@ static void zfcp_hba_dbf_view_status(cha
 		      r->payload_size);
 }
 
-static void zfcp_hba_dbf_view_qdio(char **p, struct zfcp_hba_dbf_record_qdio *r)
+static void zfcp_dbf_hba_view_qdio(char **p, struct zfcp_dbf_hba_record_qdio *r)
 {
 	zfcp_dbf_out(p, "qdio_error", "0x%08x", r->qdio_error);
 	zfcp_dbf_out(p, "sbal_index", "0x%02x", r->sbal_index);
 	zfcp_dbf_out(p, "sbal_count", "0x%02x", r->sbal_count);
 }
 
-static void zfcp_hba_dbf_view_berr(char **p, struct fsf_bit_error_payload *r)
+static void zfcp_dbf_hba_view_berr(char **p, struct fsf_bit_error_payload *r)
 {
 	zfcp_dbf_out(p, "link_failures", "%d", r->link_failure_error_count);
 	zfcp_dbf_out(p, "loss_of_sync_err", "%d", r->loss_of_sync_error_count);
@@ -424,10 +418,10 @@ static void zfcp_hba_dbf_view_berr(char 
 		     r->current_transmit_b2b_credit);
 }
 
-static int zfcp_hba_dbf_view_format(debug_info_t *id, struct debug_view *view,
+static int zfcp_dbf_hba_view_format(debug_info_t *id, struct debug_view *view,
 				    char *out_buf, const char *in_buf)
 {
-	struct zfcp_hba_dbf_record *r = (struct zfcp_hba_dbf_record *)in_buf;
+	struct zfcp_dbf_hba_record *r = (struct zfcp_dbf_hba_record *)in_buf;
 	char *p = out_buf;
 
 	if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
@@ -438,45 +432,42 @@ static int zfcp_hba_dbf_view_format(debu
 		zfcp_dbf_tag(&p, "tag2", r->tag2);
 
 	if (strncmp(r->tag, "resp", ZFCP_DBF_TAG_SIZE) == 0)
-		zfcp_hba_dbf_view_response(&p, &r->u.response);
+		zfcp_dbf_hba_view_response(&p, &r->u.response);
 	else if (strncmp(r->tag, "stat", ZFCP_DBF_TAG_SIZE) == 0)
-		zfcp_hba_dbf_view_status(&p, &r->u.status);
+		zfcp_dbf_hba_view_status(&p, &r->u.status);
 	else if (strncmp(r->tag, "qdio", ZFCP_DBF_TAG_SIZE) == 0)
-		zfcp_hba_dbf_view_qdio(&p, &r->u.qdio);
+		zfcp_dbf_hba_view_qdio(&p, &r->u.qdio);
 	else if (strncmp(r->tag, "berr", ZFCP_DBF_TAG_SIZE) == 0)
-		zfcp_hba_dbf_view_berr(&p, &r->u.berr);
+		zfcp_dbf_hba_view_berr(&p, &r->u.berr);
 
 	if (strncmp(r->tag, "resp", ZFCP_DBF_TAG_SIZE) != 0)
 		p += sprintf(p, "\n");
 	return p - out_buf;
 }
 
-static struct debug_view zfcp_hba_dbf_view = {
-	"structured",
-	NULL,
-	&zfcp_dbf_view_header,
-	&zfcp_hba_dbf_view_format,
-	NULL,
-	NULL
+static struct debug_view zfcp_dbf_hba_view = {
+	.name = "structured",
+	.header_proc = zfcp_dbf_view_header,
+	.format_proc = zfcp_dbf_hba_view_format,
 };
 
-static const char *zfcp_rec_dbf_tags[] = {
+static const char *zfcp_dbf_rec_tags[] = {
 	[ZFCP_REC_DBF_ID_THREAD] = "thread",
 	[ZFCP_REC_DBF_ID_TARGET] = "target",
 	[ZFCP_REC_DBF_ID_TRIGGER] = "trigger",
 	[ZFCP_REC_DBF_ID_ACTION] = "action",
 };
 
-static int zfcp_rec_dbf_view_format(debug_info_t *id, struct debug_view *view,
+static int zfcp_dbf_rec_view_format(debug_info_t *id, struct debug_view *view,
 				    char *buf, const char *_rec)
 {
-	struct zfcp_rec_dbf_record *r = (struct zfcp_rec_dbf_record *)_rec;
+	struct zfcp_dbf_rec_record *r = (struct zfcp_dbf_rec_record *)_rec;
 	char *p = buf;
 	char hint[ZFCP_DBF_ID_SIZE + 1];
 
 	memcpy(hint, r->id2, ZFCP_DBF_ID_SIZE);
 	hint[ZFCP_DBF_ID_SIZE] = 0;
-	zfcp_dbf_outs(&p, "tag", zfcp_rec_dbf_tags[r->id]);
+	zfcp_dbf_outs(&p, "tag", zfcp_dbf_rec_tags[r->id]);
 	zfcp_dbf_outs(&p, "hint", hint);
 	switch (r->id) {
 	case ZFCP_REC_DBF_ID_THREAD:
@@ -514,25 +505,22 @@ static int zfcp_rec_dbf_view_format(debu
 	return p - buf;
 }
 
-static struct debug_view zfcp_rec_dbf_view = {
-	"structured",
-	NULL,
-	&zfcp_dbf_view_header,
-	&zfcp_rec_dbf_view_format,
-	NULL,
-	NULL
+static struct debug_view zfcp_dbf_rec_view = {
+	.name = "structured",
+	.header_proc = zfcp_dbf_view_header,
+	.format_proc = zfcp_dbf_rec_view_format,
 };
 
 /**
- * zfcp_rec_dbf_event_thread - trace event related to recovery thread operation
+ * zfcp_dbf_rec_thread - trace event related to recovery thread operation
  * @id2: identifier for event
- * @adapter: adapter
+ * @dbf: reference to dbf structure
  * This function assumes that the caller is holding erp_lock.
  */
-void zfcp_rec_dbf_event_thread(char *id2, struct zfcp_adapter *adapter)
+void zfcp_dbf_rec_thread(char *id2, struct zfcp_dbf *dbf)
 {
-	struct zfcp_dbf *dbf = adapter->dbf;
-	struct zfcp_rec_dbf_record *r = &dbf->rec_dbf_buf;
+	struct zfcp_adapter *adapter = dbf->adapter;
+	struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
 	unsigned long flags = 0;
 	struct list_head *entry;
 	unsigned ready = 0, running = 0, total;
@@ -543,42 +531,41 @@ void zfcp_rec_dbf_event_thread(char *id2
 		running++;
 	total = adapter->erp_total_count;
 
-	spin_lock_irqsave(&dbf->rec_dbf_lock, flags);
+	spin_lock_irqsave(&dbf->rec_lock, flags);
 	memset(r, 0, sizeof(*r));
 	r->id = ZFCP_REC_DBF_ID_THREAD;
 	memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
 	r->u.thread.total = total;
 	r->u.thread.ready = ready;
 	r->u.thread.running = running;
-	debug_event(dbf->rec_dbf, 6, r, sizeof(*r));
-	spin_unlock_irqrestore(&dbf->rec_dbf_lock, flags);
+	debug_event(dbf->rec, 6, r, sizeof(*r));
+	spin_unlock_irqrestore(&dbf->rec_lock, flags);
 }
 
 /**
- * zfcp_rec_dbf_event_thread - trace event related to recovery thread operation
+ * zfcp_dbf_rec_thread - trace event related to recovery thread operation
  * @id2: identifier for event
  * @adapter: adapter
  * This function assumes that the caller does not hold erp_lock.
  */
-void zfcp_rec_dbf_event_thread_lock(char *id2, struct zfcp_adapter *adapter)
+void zfcp_dbf_rec_thread_lock(char *id2, struct zfcp_dbf *dbf)
 {
+	struct zfcp_adapter *adapter = dbf->adapter;
 	unsigned long flags;
 
 	read_lock_irqsave(&adapter->erp_lock, flags);
-	zfcp_rec_dbf_event_thread(id2, adapter);
+	zfcp_dbf_rec_thread(id2, dbf);
 	read_unlock_irqrestore(&adapter->erp_lock, flags);
 }
 
-static void zfcp_rec_dbf_event_target(char *id2, void *ref,
-				      struct zfcp_adapter *adapter,
-				      atomic_t *status, atomic_t *erp_count,
-				      u64 wwpn, u32 d_id, u64 fcp_lun)
+static void zfcp_dbf_rec_target(char *id2, void *ref, struct zfcp_dbf *dbf,
+				atomic_t *status, atomic_t *erp_count, u64 wwpn,
+				u32 d_id, u64 fcp_lun)
 {
-	struct zfcp_dbf *dbf = adapter->dbf;
-	struct zfcp_rec_dbf_record *r = &dbf->rec_dbf_buf;
+	struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
 	unsigned long flags;
 
-	spin_lock_irqsave(&dbf->rec_dbf_lock, flags);
+	spin_lock_irqsave(&dbf->rec_lock, flags);
 	memset(r, 0, sizeof(*r));
 	r->id = ZFCP_REC_DBF_ID_TARGET;
 	memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
@@ -588,56 +575,57 @@ static void zfcp_rec_dbf_event_target(ch
 	r->u.target.d_id = d_id;
 	r->u.target.fcp_lun = fcp_lun;
 	r->u.target.erp_count = atomic_read(erp_count);
-	debug_event(dbf->rec_dbf, 3, r, sizeof(*r));
-	spin_unlock_irqrestore(&dbf->rec_dbf_lock, flags);
+	debug_event(dbf->rec, 3, r, sizeof(*r));
+	spin_unlock_irqrestore(&dbf->rec_lock, flags);
 }
 
 /**
- * zfcp_rec_dbf_event_adapter - trace event for adapter state change
+ * zfcp_dbf_rec_adapter - trace event for adapter state change
  * @id: identifier for trigger of state change
  * @ref: additional reference (e.g. request)
- * @adapter: adapter
+ * @dbf: reference to dbf structure
  */
-void zfcp_rec_dbf_event_adapter(char *id, void *ref,
-				struct zfcp_adapter *adapter)
+void zfcp_dbf_rec_adapter(char *id, void *ref, struct zfcp_dbf *dbf)
 {
-	zfcp_rec_dbf_event_target(id, ref, adapter, &adapter->status,
+	struct zfcp_adapter *adapter = dbf->adapter;
+
+	zfcp_dbf_rec_target(id, ref, dbf, &adapter->status,
 				  &adapter->erp_counter, 0, 0, 0);
 }
 
 /**
- * zfcp_rec_dbf_event_port - trace event for port state change
+ * zfcp_dbf_rec_port - trace event for port state change
  * @id: identifier for trigger of state change
  * @ref: additional reference (e.g. request)
  * @port: port
  */
-void zfcp_rec_dbf_event_port(char *id, void *ref, struct zfcp_port *port)
+void zfcp_dbf_rec_port(char *id, void *ref, struct zfcp_port *port)
 {
-	struct zfcp_adapter *adapter = port->adapter;
+	struct zfcp_dbf *dbf = port->adapter->dbf;
 
-	zfcp_rec_dbf_event_target(id, ref, adapter, &port->status,
+	zfcp_dbf_rec_target(id, ref, dbf, &port->status,
 				  &port->erp_counter, port->wwpn, port->d_id,
 				  0);
 }
 
 /**
- * zfcp_rec_dbf_event_unit - trace event for unit state change
+ * zfcp_dbf_rec_unit - trace event for unit state change
  * @id: identifier for trigger of state change
  * @ref: additional reference (e.g. request)
  * @unit: unit
  */
-void zfcp_rec_dbf_event_unit(char *id, void *ref, struct zfcp_unit *unit)
+void zfcp_dbf_rec_unit(char *id, void *ref, struct zfcp_unit *unit)
 {
 	struct zfcp_port *port = unit->port;
-	struct zfcp_adapter *adapter = port->adapter;
+	struct zfcp_dbf *dbf = port->adapter->dbf;
 
-	zfcp_rec_dbf_event_target(id, ref, adapter, &unit->status,
+	zfcp_dbf_rec_target(id, ref, dbf, &unit->status,
 				  &unit->erp_counter, port->wwpn, port->d_id,
 				  unit->fcp_lun);
 }
 
 /**
- * zfcp_rec_dbf_event_trigger - trace event for triggered error recovery
+ * zfcp_dbf_rec_trigger - trace event for triggered error recovery
  * @id2: identifier for error recovery trigger
  * @ref: additional reference (e.g. request)
  * @want: originally requested error recovery action
@@ -647,15 +635,15 @@ void zfcp_rec_dbf_event_unit(char *id, v
  * @port: port
  * @unit: unit
  */
-void zfcp_rec_dbf_event_trigger(char *id2, void *ref, u8 want, u8 need,
-				void *action, struct zfcp_adapter *adapter,
-				struct zfcp_port *port, struct zfcp_unit *unit)
+void zfcp_dbf_rec_trigger(char *id2, void *ref, u8 want, u8 need, void *action,
+			  struct zfcp_adapter *adapter, struct zfcp_port *port,
+			  struct zfcp_unit *unit)
 {
 	struct zfcp_dbf *dbf = adapter->dbf;
-	struct zfcp_rec_dbf_record *r = &dbf->rec_dbf_buf;
+	struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
 	unsigned long flags;
 
-	spin_lock_irqsave(&dbf->rec_dbf_lock, flags);
+	spin_lock_irqsave(&dbf->rec_lock, flags);
 	memset(r, 0, sizeof(*r));
 	r->id = ZFCP_REC_DBF_ID_TRIGGER;
 	memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
@@ -672,23 +660,22 @@ void zfcp_rec_dbf_event_trigger(char *id
 		r->u.trigger.us = atomic_read(&unit->status);
 		r->u.trigger.fcp_lun = unit->fcp_lun;
 	}
-	debug_event(dbf->rec_dbf, action ? 1 : 4, r, sizeof(*r));
-	spin_unlock_irqrestore(&dbf->rec_dbf_lock, flags);
+	debug_event(dbf->rec, action ? 1 : 4, r, sizeof(*r));
+	spin_unlock_irqrestore(&dbf->rec_lock, flags);
 }
 
 /**
- * zfcp_rec_dbf_event_action - trace event showing progress of recovery action
+ * zfcp_dbf_rec_action - trace event showing progress of recovery action
  * @id2: identifier
  * @erp_action: error recovery action struct pointer
  */
-void zfcp_rec_dbf_event_action(char *id2, struct zfcp_erp_action *erp_action)
+void zfcp_dbf_rec_action(char *id2, struct zfcp_erp_action *erp_action)
 {
-	struct zfcp_adapter *adapter = erp_action->adapter;
-	struct zfcp_dbf *dbf = adapter->dbf;
-	struct zfcp_rec_dbf_record *r = &dbf->rec_dbf_buf;
+	struct zfcp_dbf *dbf = erp_action->adapter->dbf;
+	struct zfcp_dbf_rec_record *r = &dbf->rec_buf;
 	unsigned long flags;
 
-	spin_lock_irqsave(&dbf->rec_dbf_lock, flags);
+	spin_lock_irqsave(&dbf->rec_lock, flags);
 	memset(r, 0, sizeof(*r));
 	r->id = ZFCP_REC_DBF_ID_ACTION;
 	memcpy(r->id2, id2, ZFCP_DBF_ID_SIZE);
@@ -696,27 +683,27 @@ void zfcp_rec_dbf_event_action(char *id2
 	r->u.action.status = erp_action->status;
 	r->u.action.step = erp_action->step;
 	r->u.action.fsf_req = (unsigned long)erp_action->fsf_req;
-	debug_event(dbf->rec_dbf, 5, r, sizeof(*r));
-	spin_unlock_irqrestore(&dbf->rec_dbf_lock, flags);
+	debug_event(dbf->rec, 5, r, sizeof(*r));
+	spin_unlock_irqrestore(&dbf->rec_lock, flags);
 }
 
 /**
- * zfcp_san_dbf_event_ct_request - trace event for issued CT request
+ * zfcp_dbf_san_ct_request - trace event for issued CT request
  * @fsf_req: request containing issued CT data
  */
-void zfcp_san_dbf_event_ct_request(struct zfcp_fsf_req *fsf_req)
+void zfcp_dbf_san_ct_request(struct zfcp_fsf_req *fsf_req)
 {
 	struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 	struct zfcp_wka_port *wka_port = ct->wka_port;
 	struct zfcp_adapter *adapter = wka_port->adapter;
 	struct zfcp_dbf *dbf = adapter->dbf;
 	struct ct_hdr *hdr = sg_virt(ct->req);
-	struct zfcp_san_dbf_record *r = &dbf->san_dbf_buf;
-	struct zfcp_san_dbf_record_ct_request *oct = &r->u.ct_req;
+	struct zfcp_dbf_san_record *r = &dbf->san_buf;
+	struct zfcp_dbf_san_record_ct_request *oct = &r->u.ct_req;
 	int level = 3;
 	unsigned long flags;
 
-	spin_lock_irqsave(&dbf->san_dbf_lock, flags);
+	spin_lock_irqsave(&dbf->san_lock, flags);
 	memset(r, 0, sizeof(*r));
 	strncpy(r->tag, "octc", ZFCP_DBF_TAG_SIZE);
 	r->fsf_reqid = fsf_req->req_id;
@@ -731,29 +718,29 @@ void zfcp_san_dbf_event_ct_request(struc
 	oct->max_res_size = hdr->max_res_size;
 	oct->len = min((int)ct->req->length - (int)sizeof(struct ct_hdr),
 		       ZFCP_DBF_SAN_MAX_PAYLOAD);
-	debug_event(dbf->san_dbf, level, r, sizeof(*r));
-	zfcp_dbf_hexdump(dbf->san_dbf, r, sizeof(*r), level,
+	debug_event(dbf->san, level, r, sizeof(*r));
+	zfcp_dbf_hexdump(dbf->san, r, sizeof(*r), level,
 			 (void *)hdr + sizeof(struct ct_hdr), oct->len);
-	spin_unlock_irqrestore(&dbf->san_dbf_lock, flags);
+	spin_unlock_irqrestore(&dbf->san_lock, flags);
 }
 
 /**
- * zfcp_san_dbf_event_ct_response - trace event for completion of CT request
+ * zfcp_dbf_san_ct_response - trace event for completion of CT request
  * @fsf_req: request containing CT response
  */
-void zfcp_san_dbf_event_ct_response(struct zfcp_fsf_req *fsf_req)
+void zfcp_dbf_san_ct_response(struct zfcp_fsf_req *fsf_req)
 {
 	struct zfcp_send_ct *ct = (struct zfcp_send_ct *)fsf_req->data;
 	struct zfcp_wka_port *wka_port = ct->wka_port;
 	struct zfcp_adapter *adapter = wka_port->adapter;
 	struct ct_hdr *hdr = sg_virt(ct->resp);
 	struct zfcp_dbf *dbf = adapter->dbf;
-	struct zfcp_san_dbf_record *r = &dbf->san_dbf_buf;
-	struct zfcp_san_dbf_record_ct_response *rct = &r->u.ct_resp;
+	struct zfcp_dbf_san_record *r = &dbf->san_buf;
+	struct zfcp_dbf_san_record_ct_response *rct = &r->u.ct_resp;
 	int level = 3;
 	unsigned long flags;
 
-	spin_lock_irqsave(&dbf->san_dbf_lock, flags);
+	spin_lock_irqsave(&dbf->san_lock, flags);
 	memset(r, 0, sizeof(*r));
 	strncpy(r->tag, "rctc", ZFCP_DBF_TAG_SIZE);
 	r->fsf_reqid = fsf_req->req_id;
@@ -768,23 +755,22 @@ void zfcp_san_dbf_event_ct_response(stru
 	rct->max_res_size = hdr->max_res_size;
 	rct->len = min((int)ct->resp->length - (int)sizeof(struct ct_hdr),
 		       ZFCP_DBF_SAN_MAX_PAYLOAD);
-	debug_event(dbf->san_dbf, level, r, sizeof(*r));
-	zfcp_dbf_hexdump(dbf->san_dbf, r, sizeof(*r), level,
+	debug_event(dbf->san, level, r, sizeof(*r));
+	zfcp_dbf_hexdump(dbf->san, r, sizeof(*r), level,
 			 (void *)hdr + sizeof(struct ct_hdr), rct->len);
-	spin_unlock_irqrestore(&dbf->san_dbf_lock, flags);
+	spin_unlock_irqrestore(&dbf->san_lock, flags);
 }
 
-static void zfcp_san_dbf_event_els(const char *tag, int level,
-				   struct zfcp_fsf_req *fsf_req, u32 s_id,
-				   u32 d_id, u8 ls_code, void *buffer,
-				   int buflen)
+static void zfcp_dbf_san_els(const char *tag, int level,
+			     struct zfcp_fsf_req *fsf_req, u32 s_id, u32 d_id,
+			     u8 ls_code, void *buffer, int buflen)
 {
 	struct zfcp_adapter *adapter = fsf_req->adapter;
 	struct zfcp_dbf *dbf = adapter->dbf;
-	struct zfcp_san_dbf_record *rec = &dbf->san_dbf_buf;
+	struct zfcp_dbf_san_record *rec = &dbf->san_buf;
 	unsigned long flags;
 
-	spin_lock_irqsave(&dbf->san_dbf_lock, flags);
+	spin_lock_irqsave(&dbf->san_lock, flags);
 	memset(rec, 0, sizeof(*rec));
 	strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
 	rec->fsf_reqid = fsf_req->req_id;
@@ -792,45 +778,45 @@ static void zfcp_san_dbf_event_els(const
 	rec->s_id = s_id;
 	rec->d_id = d_id;
 	rec->u.els.ls_code = ls_code;
-	debug_event(dbf->san_dbf, level, rec, sizeof(*rec));
-	zfcp_dbf_hexdump(dbf->san_dbf, rec, sizeof(*rec), level,
+	debug_event(dbf->san, level, rec, sizeof(*rec));
+	zfcp_dbf_hexdump(dbf->san, rec, sizeof(*rec), level,
 			 buffer, min(buflen, ZFCP_DBF_SAN_MAX_PAYLOAD));
-	spin_unlock_irqrestore(&dbf->san_dbf_lock, flags);
+	spin_unlock_irqrestore(&dbf->san_lock, flags);
 }
 
 /**
- * zfcp_san_dbf_event_els_request - trace event for issued ELS
+ * zfcp_dbf_san_els_request - trace event for issued ELS
  * @fsf_req: request containing issued ELS
  */
-void zfcp_san_dbf_event_els_request(struct zfcp_fsf_req *fsf_req)
+void zfcp_dbf_san_els_request(struct zfcp_fsf_req *fsf_req)
 {
 	struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
 
-	zfcp_san_dbf_event_els("oels", 2, fsf_req,
+	zfcp_dbf_san_els("oels", 2, fsf_req,
 			       fc_host_port_id(els->adapter->scsi_host),
 			       els->d_id, *(u8 *) sg_virt(els->req),
 			       sg_virt(els->req), els->req->length);
 }
 
 /**
- * zfcp_san_dbf_event_els_response - trace event for completed ELS
+ * zfcp_dbf_san_els_response - trace event for completed ELS
  * @fsf_req: request containing ELS response
  */
-void zfcp_san_dbf_event_els_response(struct zfcp_fsf_req *fsf_req)
+void zfcp_dbf_san_els_response(struct zfcp_fsf_req *fsf_req)
 {
 	struct zfcp_send_els *els = (struct zfcp_send_els *)fsf_req->data;
 
-	zfcp_san_dbf_event_els("rels", 2, fsf_req, els->d_id,
+	zfcp_dbf_san_els("rels", 2, fsf_req, els->d_id,
 			       fc_host_port_id(els->adapter->scsi_host),
 			       *(u8 *)sg_virt(els->req), sg_virt(els->resp),
 			       els->resp->length);
 }
 
 /**
- * zfcp_san_dbf_event_incoming_els - trace event for incomig ELS
+ * zfcp_dbf_san_incoming_els - trace event for incomig ELS
  * @fsf_req: request containing unsolicited status buffer with incoming ELS
  */
-void zfcp_san_dbf_event_incoming_els(struct zfcp_fsf_req *fsf_req)
+void zfcp_dbf_san_incoming_els(struct zfcp_fsf_req *fsf_req)
 {
 	struct zfcp_adapter *adapter = fsf_req->adapter;
 	struct fsf_status_read_buffer *buf =
@@ -838,16 +824,16 @@ void zfcp_san_dbf_event_incoming_els(str
 	int length = (int)buf->length -
 		     (int)((void *)&buf->payload - (void *)buf);
 
-	zfcp_san_dbf_event_els("iels", 1, fsf_req, buf->d_id,
+	zfcp_dbf_san_els("iels", 1, fsf_req, buf->d_id,
 			       fc_host_port_id(adapter->scsi_host),
 			       buf->payload.data[0], (void *)buf->payload.data,
 			       length);
 }
 
-static int zfcp_san_dbf_view_format(debug_info_t *id, struct debug_view *view,
+static int zfcp_dbf_san_view_format(debug_info_t *id, struct debug_view *view,
 				    char *out_buf, const char *in_buf)
 {
-	struct zfcp_san_dbf_record *r = (struct zfcp_san_dbf_record *)in_buf;
+	struct zfcp_dbf_san_record *r = (struct zfcp_dbf_san_record *)in_buf;
 	char *p = out_buf;
 
 	if (strncmp(r->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
@@ -860,7 +846,7 @@ static int zfcp_san_dbf_view_format(debu
 	zfcp_dbf_out(&p, "d_id", "0x%06x", r->d_id);
 
 	if (strncmp(r->tag, "octc", ZFCP_DBF_TAG_SIZE) == 0) {
-		struct zfcp_san_dbf_record_ct_request *ct = &r->u.ct_req;
+		struct zfcp_dbf_san_record_ct_request *ct = &r->u.ct_req;
 		zfcp_dbf_out(&p, "cmd_req_code", "0x%04x", ct->cmd_req_code);
 		zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
 		zfcp_dbf_out(&p, "gs_type", "0x%02x", ct->gs_type);
@@ -868,7 +854,7 @@ static int zfcp_san_dbf_view_format(debu
 		zfcp_dbf_out(&p, "options", "0x%02x", ct->options);
 		zfcp_dbf_out(&p, "max_res_size", "0x%04x", ct->max_res_size);
 	} else if (strncmp(r->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
-		struct zfcp_san_dbf_record_ct_response *ct = &r->u.ct_resp;
+		struct zfcp_dbf_san_record_ct_response *ct = &r->u.ct_resp;
 		zfcp_dbf_out(&p, "cmd_rsp_code", "0x%04x", ct->cmd_rsp_code);
 		zfcp_dbf_out(&p, "revision", "0x%02x", ct->revision);
 		zfcp_dbf_out(&p, "reason_code", "0x%02x", ct->reason_code);
@@ -878,34 +864,30 @@ static int zfcp_san_dbf_view_format(debu
 	} else if (strncmp(r->tag, "oels", ZFCP_DBF_TAG_SIZE) == 0 ||
 		   strncmp(r->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 ||
 		   strncmp(r->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) {
-		struct zfcp_san_dbf_record_els *els = &r->u.els;
+		struct zfcp_dbf_san_record_els *els = &r->u.els;
 		zfcp_dbf_out(&p, "ls_code", "0x%02x", els->ls_code);
 	}
 	return p - out_buf;
 }
 
-static struct debug_view zfcp_san_dbf_view = {
-	"structured",
-	NULL,
-	&zfcp_dbf_view_header,
-	&zfcp_san_dbf_view_format,
-	NULL,
-	NULL
+static struct debug_view zfcp_dbf_san_view = {
+	.name = "structured",
+	.header_proc = zfcp_dbf_view_header,
+	.format_proc = zfcp_dbf_san_view_format,
 };
 
-void _zfcp_scsi_dbf_event(const char *tag, const char *tag2, int level,
-			  struct zfcp_dbf *dbf, struct scsi_cmnd *scsi_cmnd,
-			  struct zfcp_fsf_req *fsf_req,
-			  unsigned long old_req_id)
+void _zfcp_dbf_scsi(const char *tag, const char *tag2, int level,
+		    struct zfcp_dbf *dbf, struct scsi_cmnd *scsi_cmnd,
+		    struct zfcp_fsf_req *fsf_req, unsigned long old_req_id)
 {
-	struct zfcp_scsi_dbf_record *rec = &dbf->scsi_dbf_buf;
+	struct zfcp_dbf_scsi_record *rec = &dbf->scsi_buf;
 	struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
 	unsigned long flags;
 	struct fcp_rsp_iu *fcp_rsp;
 	char *fcp_rsp_info = NULL, *fcp_sns_info = NULL;
 	int offset = 0, buflen = 0;
 
-	spin_lock_irqsave(&dbf->scsi_dbf_lock, flags);
+	spin_lock_irqsave(&dbf->scsi_lock, flags);
 	do {
 		memset(rec, 0, sizeof(*rec));
 		if (offset == 0) {
@@ -959,20 +941,20 @@ void _zfcp_scsi_dbf_event(const char *ta
 			dump->offset = offset;
 			dump->size = min(buflen - offset,
 					 (int)sizeof(struct
-						     zfcp_scsi_dbf_record) -
+						     zfcp_dbf_scsi_record) -
 					 (int)sizeof(struct zfcp_dbf_dump));
 			memcpy(dump->data, fcp_sns_info + offset, dump->size);
 			offset += dump->size;
 		}
-		debug_event(dbf->scsi_dbf, level, rec, sizeof(*rec));
+		debug_event(dbf->scsi, level, rec, sizeof(*rec));
 	} while (offset < buflen);
-	spin_unlock_irqrestore(&dbf->scsi_dbf_lock, flags);
+	spin_unlock_irqrestore(&dbf->scsi_lock, flags);
 }
 
-static int zfcp_scsi_dbf_view_format(debug_info_t *id, struct debug_view *view,
+static int zfcp_dbf_scsi_view_format(debug_info_t *id, struct debug_view *view,
 				     char *out_buf, const char *in_buf)
 {
-	struct zfcp_scsi_dbf_record *r = (struct zfcp_scsi_dbf_record *)in_buf;
+	struct zfcp_dbf_scsi_record *r = (struct zfcp_dbf_scsi_record *)in_buf;
 	struct timespec t;
 	char *p = out_buf;
 
@@ -1013,13 +995,10 @@ static int zfcp_scsi_dbf_view_format(deb
 	return p - out_buf;
 }
 
-static struct debug_view zfcp_scsi_dbf_view = {
-	"structured",
-	NULL,
-	&zfcp_dbf_view_header,
-	&zfcp_scsi_dbf_view_format,
-	NULL,
-	NULL
+static struct debug_view zfcp_dbf_scsi_view = {
+	.name = "structured",
+	.header_proc = zfcp_dbf_view_header,
+	.format_proc = zfcp_dbf_scsi_view_format,
 };
 
 static debug_info_t *zfcp_dbf_reg(const char *name, int level,
@@ -1043,7 +1022,7 @@ static debug_info_t *zfcp_dbf_reg(const 
  * @adapter: pointer to adapter for which debug features should be registered
  * return: -ENOMEM on error, 0 otherwise
  */
-int zfcp_adapter_debug_register(struct zfcp_adapter *adapter)
+int zfcp_dbf_adapter_register(struct zfcp_adapter *adapter)
 {
 	char dbf_name[DEBUG_MAX_NAME_LEN];
 	struct zfcp_dbf *dbf;
@@ -1052,63 +1031,60 @@ int zfcp_adapter_debug_register(struct z
 	if (!dbf)
 		return -ENOMEM;
 
-	spin_lock_init(&dbf->hba_dbf_lock);
-	spin_lock_init(&dbf->san_dbf_lock);
-	spin_lock_init(&dbf->scsi_dbf_lock);
-	spin_lock_init(&dbf->rec_dbf_lock);
+	dbf->adapter = adapter;
+
+	spin_lock_init(&dbf->hba_lock);
+	spin_lock_init(&dbf->san_lock);
+	spin_lock_init(&dbf->scsi_lock);
+	spin_lock_init(&dbf->rec_lock);
 
 	/* debug feature area which records recovery activity */
 	sprintf(dbf_name, "zfcp_%s_rec", dev_name(&adapter->ccw_device->dev));
-	dbf->rec_dbf = zfcp_dbf_reg(dbf_name, 3, &zfcp_rec_dbf_view,
-				    sizeof(struct zfcp_rec_dbf_record));
-	if (!dbf->rec_dbf)
-		goto fail_rec;
+	dbf->rec = zfcp_dbf_reg(dbf_name, 3, &zfcp_dbf_rec_view,
+				sizeof(struct zfcp_dbf_rec_record));
+	if (!dbf->rec)
+		goto err_out;
 
 	/* debug feature area which records HBA (FSF and QDIO) conditions */
 	sprintf(dbf_name, "zfcp_%s_hba", dev_name(&adapter->ccw_device->dev));
-	dbf->hba_dbf = zfcp_dbf_reg(dbf_name, 3, &zfcp_hba_dbf_view,
-				    sizeof(struct zfcp_hba_dbf_record));
-	if (!dbf->hba_dbf)
-		goto fail_hba;
+	dbf->hba = zfcp_dbf_reg(dbf_name, 3, &zfcp_dbf_hba_view,
+				sizeof(struct zfcp_dbf_hba_record));
+	if (!dbf->hba)
+		goto err_out;
 
 	/* debug feature area which records SAN command failures and recovery */
 	sprintf(dbf_name, "zfcp_%s_san", dev_name(&adapter->ccw_device->dev));
-	dbf->san_dbf = zfcp_dbf_reg(dbf_name, 6, &zfcp_san_dbf_view,
-				    sizeof(struct zfcp_san_dbf_record));
-	if (!dbf->san_dbf)
-		goto fail_san;
+	dbf->san = zfcp_dbf_reg(dbf_name, 6, &zfcp_dbf_san_view,
+				sizeof(struct zfcp_dbf_san_record));
+	if (!dbf->san)
+		goto err_out;
 
 	/* debug feature area which records SCSI command failures and recovery */
 	sprintf(dbf_name, "zfcp_%s_scsi", dev_name(&adapter->ccw_device->dev));
-	dbf->scsi_dbf = zfcp_dbf_reg(dbf_name, 3, &zfcp_scsi_dbf_view,
-				     sizeof(struct zfcp_scsi_dbf_record));
-	if (!dbf->scsi_dbf)
-		goto fail_scsi;
+	dbf->scsi = zfcp_dbf_reg(dbf_name, 3, &zfcp_dbf_scsi_view,
+				 sizeof(struct zfcp_dbf_scsi_record));
+	if (!dbf->scsi)
+		goto err_out;
 
 	adapter->dbf = dbf;
 	return 0;
 
-fail_scsi:
-	debug_unregister(dbf->san_dbf);
-fail_san:
-	debug_unregister(dbf->hba_dbf);
-fail_hba:
-	debug_unregister(dbf->rec_dbf);
-fail_rec:
-	kfree(dbf);
+err_out:
+	zfcp_dbf_adapter_unregister(dbf);
 	return -ENOMEM;
 }
 
 /**
  * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter
- * @adapter: pointer to adapter for which debug features should be unregistered
+ * @dbf: pointer to dbf for which debug features should be unregistered
  */
-void zfcp_adapter_debug_unregister(struct zfcp_adapter *adapter)
+void zfcp_dbf_adapter_unregister(struct zfcp_dbf *dbf)
 {
-	debug_unregister(adapter->dbf->scsi_dbf);
-	debug_unregister(adapter->dbf->san_dbf);
-	debug_unregister(adapter->dbf->hba_dbf);
-	debug_unregister(adapter->dbf->rec_dbf);
-	kfree(adapter->dbf);
-	adapter->dbf = NULL;
+	debug_unregister(dbf->scsi);
+	debug_unregister(dbf->san);
+	debug_unregister(dbf->hba);
+	debug_unregister(dbf->rec);
+	dbf->adapter->dbf = NULL;
+	kfree(dbf);
 }
+
--- a/drivers/s390/scsi/zfcp_dbf.h	2009-08-17 13:26:27.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_dbf.h	2009-08-17 13:26:55.000000000 +0200
@@ -37,13 +37,13 @@ struct zfcp_dbf_dump {
 	u8 data[];		/* dump data */
 } __attribute__ ((packed));
 
-struct zfcp_rec_dbf_record_thread {
+struct zfcp_dbf_rec_record_thread {
 	u32 total;
 	u32 ready;
 	u32 running;
 };
 
-struct zfcp_rec_dbf_record_target {
+struct zfcp_dbf_rec_record_target {
 	u64 ref;
 	u32 status;
 	u32 d_id;
@@ -52,7 +52,7 @@ struct zfcp_rec_dbf_record_target {
 	u32 erp_count;
 };
 
-struct zfcp_rec_dbf_record_trigger {
+struct zfcp_dbf_rec_record_trigger {
 	u8 want;
 	u8 need;
 	u32 as;
@@ -64,21 +64,21 @@ struct zfcp_rec_dbf_record_trigger {
 	u64 fcp_lun;
 };
 
-struct zfcp_rec_dbf_record_action {
+struct zfcp_dbf_rec_record_action {
 	u32 status;
 	u32 step;
 	u64 action;
 	u64 fsf_req;
 };
 
-struct zfcp_rec_dbf_record {
+struct zfcp_dbf_rec_record {
 	u8 id;
 	char id2[7];
 	union {
-		struct zfcp_rec_dbf_record_action action;
-		struct zfcp_rec_dbf_record_thread thread;
-		struct zfcp_rec_dbf_record_target target;
-		struct zfcp_rec_dbf_record_trigger trigger;
+		struct zfcp_dbf_rec_record_action action;
+		struct zfcp_dbf_rec_record_thread thread;
+		struct zfcp_dbf_rec_record_target target;
+		struct zfcp_dbf_rec_record_trigger trigger;
 	} u;
 };
 
@@ -89,7 +89,7 @@ enum {
 	ZFCP_REC_DBF_ID_TRIGGER,
 };
 
-struct zfcp_hba_dbf_record_response {
+struct zfcp_dbf_hba_record_response {
 	u32 fsf_command;
 	u64 fsf_reqid;
 	u32 fsf_seqno;
@@ -127,7 +127,7 @@ struct zfcp_hba_dbf_record_response {
 	} u;
 } __attribute__ ((packed));
 
-struct zfcp_hba_dbf_record_status {
+struct zfcp_dbf_hba_record_status {
 	u8 failed;
 	u32 status_type;
 	u32 status_subtype;
@@ -141,24 +141,24 @@ struct zfcp_hba_dbf_record_status {
 	u8 payload[ZFCP_DBF_UNSOL_PAYLOAD];
 } __attribute__ ((packed));
 
-struct zfcp_hba_dbf_record_qdio {
+struct zfcp_dbf_hba_record_qdio {
 	u32 qdio_error;
 	u8 sbal_index;
 	u8 sbal_count;
 } __attribute__ ((packed));
 
-struct zfcp_hba_dbf_record {
+struct zfcp_dbf_hba_record {
 	u8 tag[ZFCP_DBF_TAG_SIZE];
 	u8 tag2[ZFCP_DBF_TAG_SIZE];
 	union {
-		struct zfcp_hba_dbf_record_response response;
-		struct zfcp_hba_dbf_record_status status;
-		struct zfcp_hba_dbf_record_qdio qdio;
+		struct zfcp_dbf_hba_record_response response;
+		struct zfcp_dbf_hba_record_status status;
+		struct zfcp_dbf_hba_record_qdio qdio;
 		struct fsf_bit_error_payload berr;
 	} u;
 } __attribute__ ((packed));
 
-struct zfcp_san_dbf_record_ct_request {
+struct zfcp_dbf_san_record_ct_request {
 	u16 cmd_req_code;
 	u8 revision;
 	u8 gs_type;
@@ -168,7 +168,7 @@ struct zfcp_san_dbf_record_ct_request {
 	u32 len;
 } __attribute__ ((packed));
 
-struct zfcp_san_dbf_record_ct_response {
+struct zfcp_dbf_san_record_ct_response {
 	u16 cmd_rsp_code;
 	u8 revision;
 	u8 reason_code;
@@ -178,27 +178,27 @@ struct zfcp_san_dbf_record_ct_response {
 	u32 len;
 } __attribute__ ((packed));
 
-struct zfcp_san_dbf_record_els {
+struct zfcp_dbf_san_record_els {
 	u8 ls_code;
 	u32 len;
 } __attribute__ ((packed));
 
-struct zfcp_san_dbf_record {
+struct zfcp_dbf_san_record {
 	u8 tag[ZFCP_DBF_TAG_SIZE];
 	u64 fsf_reqid;
 	u32 fsf_seqno;
 	u32 s_id;
 	u32 d_id;
 	union {
-		struct zfcp_san_dbf_record_ct_request ct_req;
-		struct zfcp_san_dbf_record_ct_response ct_resp;
-		struct zfcp_san_dbf_record_els els;
+		struct zfcp_dbf_san_record_ct_request ct_req;
+		struct zfcp_dbf_san_record_ct_response ct_resp;
+		struct zfcp_dbf_san_record_els els;
 	} u;
 #define ZFCP_DBF_SAN_MAX_PAYLOAD 1024
 	u8 payload[32];
 } __attribute__ ((packed));
 
-struct zfcp_scsi_dbf_record {
+struct zfcp_dbf_scsi_record {
 	u8 tag[ZFCP_DBF_TAG_SIZE];
 	u8 tag2[ZFCP_DBF_TAG_SIZE];
 	u32 scsi_id;
@@ -225,86 +225,84 @@ struct zfcp_scsi_dbf_record {
 } __attribute__ ((packed));
 
 struct zfcp_dbf {
-	debug_info_t			*rec_dbf;
-	debug_info_t			*hba_dbf;
-	debug_info_t			*san_dbf;
-	debug_info_t			*scsi_dbf;
-	spinlock_t			rec_dbf_lock;
-	spinlock_t			hba_dbf_lock;
-	spinlock_t			san_dbf_lock;
-	spinlock_t			scsi_dbf_lock;
-	struct zfcp_rec_dbf_record	rec_dbf_buf;
-	struct zfcp_hba_dbf_record	hba_dbf_buf;
-	struct zfcp_san_dbf_record	san_dbf_buf;
-	struct zfcp_scsi_dbf_record	scsi_dbf_buf;
+	debug_info_t			*rec;
+	debug_info_t			*hba;
+	debug_info_t			*san;
+	debug_info_t			*scsi;
+	spinlock_t			rec_lock;
+	spinlock_t			hba_lock;
+	spinlock_t			san_lock;
+	spinlock_t			scsi_lock;
+	struct zfcp_dbf_rec_record	rec_buf;
+	struct zfcp_dbf_hba_record	hba_buf;
+	struct zfcp_dbf_san_record	san_buf;
+	struct zfcp_dbf_scsi_record	scsi_buf;
+	struct zfcp_adapter		*adapter;
 };
 
 static inline
-void zfcp_hba_dbf_event_fsf_resp(const char *tag2, int level,
-				 struct zfcp_fsf_req *req, struct zfcp_dbf *dbf)
+void zfcp_dbf_hba_fsf_resp(const char *tag2, int level,
+			   struct zfcp_fsf_req *req, struct zfcp_dbf *dbf)
 {
-	if (level <= dbf->hba_dbf->level)
-		_zfcp_hba_dbf_event_fsf_response(tag2, level, req, dbf);
+	if (level <= dbf->hba->level)
+		_zfcp_dbf_hba_fsf_response(tag2, level, req, dbf);
 }
 
 /**
- * zfcp_hba_dbf_event_fsf_response - trace event for request completion
+ * zfcp_dbf_hba_fsf_response - trace event for request completion
  * @fsf_req: request that has been completed
  */
-static inline void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *req)
+static inline void zfcp_dbf_hba_fsf_response(struct zfcp_fsf_req *req)
 {
 	struct zfcp_dbf *dbf = req->adapter->dbf;
 	struct fsf_qtcb *qtcb = req->qtcb;
 
 	if ((qtcb->prefix.prot_status != FSF_PROT_GOOD) &&
 	    (qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) {
-		zfcp_hba_dbf_event_fsf_resp("perr", 1, req, dbf);
+		zfcp_dbf_hba_fsf_resp("perr", 1, req, dbf);
 
 	} else if (qtcb->header.fsf_status != FSF_GOOD) {
-		zfcp_hba_dbf_event_fsf_resp("ferr", 1, req, dbf);
+		zfcp_dbf_hba_fsf_resp("ferr", 1, req, dbf);
 
 	} else if ((req->fsf_command == FSF_QTCB_OPEN_PORT_WITH_DID) ||
 		   (req->fsf_command == FSF_QTCB_OPEN_LUN)) {
-		zfcp_hba_dbf_event_fsf_resp("open", 4, req, dbf);
+		zfcp_dbf_hba_fsf_resp("open", 4, req, dbf);
 
 	} else if (qtcb->header.log_length) {
-		zfcp_hba_dbf_event_fsf_resp("qtcb", 5, req, dbf);
+		zfcp_dbf_hba_fsf_resp("qtcb", 5, req, dbf);
 
 	} else {
-		zfcp_hba_dbf_event_fsf_resp("norm", 6, req, dbf);
+		zfcp_dbf_hba_fsf_resp("norm", 6, req, dbf);
 	}
  }
 
 /**
- * zfcp_hba_dbf_event_fsf_unsol - trace event for an unsolicited status buffer
+ * zfcp_dbf_hba_fsf_unsol - trace event for an unsolicited status buffer
  * @tag: tag indicating which kind of unsolicited status has been received
- * @adapter: adapter that has issued the unsolicited status buffer
+ * @dbf: reference to dbf structure
  * @status_buffer: buffer containing payload of unsolicited status
  */
 static inline
-void zfcp_hba_dbf_event_fsf_unsol(const char *tag, struct zfcp_adapter *adapter,
-				  struct fsf_status_read_buffer *buf)
+void zfcp_dbf_hba_fsf_unsol(const char *tag, struct zfcp_dbf *dbf,
+			    struct fsf_status_read_buffer *buf)
 {
-	struct zfcp_dbf *dbf = adapter->dbf;
 	int level = 2;
 
-	if (level <= dbf->hba_dbf->level)
-		_zfcp_hba_dbf_event_fsf_unsol(tag, level, adapter, buf);
+	if (level <= dbf->hba->level)
+		_zfcp_dbf_hba_fsf_unsol(tag, level, dbf, buf);
 }
 
 static inline
-void zfcp_scsi_dbf_event(const char *tag, const char *tag2, int level,
-			 struct zfcp_adapter *adapter, struct scsi_cmnd *scmd,
-			 struct zfcp_fsf_req *req, unsigned long old_id)
+void zfcp_dbf_scsi(const char *tag, const char *tag2, int level,
+		   struct zfcp_dbf *dbf, struct scsi_cmnd *scmd,
+		   struct zfcp_fsf_req *req, unsigned long old_id)
 {
-	struct zfcp_dbf *dbf = adapter->dbf;
-
-	if (level <= dbf->scsi_dbf->level)
-		_zfcp_scsi_dbf_event(tag, tag2, level, dbf, scmd, req, old_id);
+	if (level <= dbf->scsi->level)
+		_zfcp_dbf_scsi(tag, tag2, level, dbf, scmd, req, old_id);
 }
 
 /**
- * zfcp_scsi_dbf_event_result - trace event for SCSI command completion
+ * zfcp_dbf_scsi_result - trace event for SCSI command completion
  * @tag: tag indicating success or failure of SCSI command
  * @level: trace level applicable for this event
  * @adapter: adapter that has been used to issue the SCSI command
@@ -312,16 +310,14 @@ void zfcp_scsi_dbf_event(const char *tag
  * @fsf_req: request used to issue SCSI command (might be NULL)
  */
 static inline
-void zfcp_scsi_dbf_event_result(const char *tag, int level,
-				struct zfcp_adapter *adapter,
-				struct scsi_cmnd *scmd,
-				struct zfcp_fsf_req *fsf_req)
+void zfcp_dbf_scsi_result(const char *tag, int level, struct zfcp_dbf *dbf,
+			  struct scsi_cmnd *scmd, struct zfcp_fsf_req *fsf_req)
 {
-	zfcp_scsi_dbf_event("rslt", tag, level, adapter, scmd, fsf_req, 0);
+	zfcp_dbf_scsi("rslt", tag, level, dbf, scmd, fsf_req, 0);
 }
 
 /**
- * zfcp_scsi_dbf_event_abort - trace event for SCSI command abort
+ * zfcp_dbf_scsi_abort - trace event for SCSI command abort
  * @tag: tag indicating success or failure of abort operation
  * @adapter: adapter thas has been used to issue SCSI command to be aborted
  * @scmd: SCSI command to be aborted
@@ -329,28 +325,26 @@ void zfcp_scsi_dbf_event_result(const ch
  * @old_id: identifier of request containg SCSI command to be aborted
  */
 static inline
-void zfcp_scsi_dbf_event_abort(const char *tag, struct zfcp_adapter *adapter,
-			       struct scsi_cmnd *scmd,
-			       struct zfcp_fsf_req *new_req,
-			       unsigned long old_id)
+void zfcp_dbf_scsi_abort(const char *tag, struct zfcp_dbf *dbf,
+			 struct scsi_cmnd *scmd, struct zfcp_fsf_req *new_req,
+			 unsigned long old_id)
 {
-	zfcp_scsi_dbf_event("abrt", tag, 1, adapter, scmd, new_req, old_id);
+	zfcp_dbf_scsi("abrt", tag, 1, dbf, scmd, new_req, old_id);
 }
 
 /**
- * zfcp_scsi_dbf_event_devreset - trace event for Logical Unit or Target Reset
+ * zfcp_dbf_scsi_devreset - trace event for Logical Unit or Target Reset
  * @tag: tag indicating success or failure of reset operation
  * @flag: indicates type of reset (Target Reset, Logical Unit Reset)
  * @unit: unit that needs reset
  * @scsi_cmnd: SCSI command which caused this error recovery
  */
 static inline
-void zfcp_scsi_dbf_event_devreset(const char *tag, u8 flag,
-				  struct zfcp_unit *unit,
-				  struct scsi_cmnd *scsi_cmnd)
+void zfcp_dbf_scsi_devreset(const char *tag, u8 flag, struct zfcp_unit *unit,
+			    struct scsi_cmnd *scsi_cmnd)
 {
-	zfcp_scsi_dbf_event(flag == FCP_TARGET_RESET ? "trst" : "lrst", tag, 1,
-			    unit->port->adapter, scsi_cmnd, NULL, 0);
+	zfcp_dbf_scsi(flag == FCP_TARGET_RESET ? "trst" : "lrst", tag, 1,
+			    unit->port->adapter->dbf, scsi_cmnd, NULL, 0);
 }
 
 #endif /* ZFCP_DBF_H */
--- a/drivers/s390/scsi/zfcp_erp.c	2009-08-17 13:26:27.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_erp.c	2009-08-17 13:26:55.000000000 +0200
@@ -74,9 +74,9 @@ static void zfcp_erp_action_ready(struct
 	struct zfcp_adapter *adapter = act->adapter;
 
 	list_move(&act->list, &act->adapter->erp_ready_head);
-	zfcp_rec_dbf_event_action("erardy1", act);
+	zfcp_dbf_rec_action("erardy1", act);
 	up(&adapter->erp_ready_sem);
-	zfcp_rec_dbf_event_thread("erardy2", adapter);
+	zfcp_dbf_rec_thread("erardy2", adapter->dbf);
 }
 
 static void zfcp_erp_action_dismiss(struct zfcp_erp_action *act)
@@ -227,11 +227,10 @@ static int zfcp_erp_action_enqueue(int w
 	++adapter->erp_total_count;
 	list_add_tail(&act->list, &adapter->erp_ready_head);
 	up(&adapter->erp_ready_sem);
-	zfcp_rec_dbf_event_thread("eracte1", adapter);
+	zfcp_dbf_rec_thread("eracte1", adapter->dbf);
 	retval = 0;
  out:
-	zfcp_rec_dbf_event_trigger(id, ref, want, need, act,
-				   adapter, port, unit);
+	zfcp_dbf_rec_trigger(id, ref, want, need, act, adapter, port, unit);
 	return retval;
 }
 
@@ -442,28 +441,28 @@ static int status_change_clear(unsigned 
 static void zfcp_erp_adapter_unblock(struct zfcp_adapter *adapter)
 {
 	if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status))
-		zfcp_rec_dbf_event_adapter("eraubl1", NULL, adapter);
+		zfcp_dbf_rec_adapter("eraubl1", NULL, adapter->dbf);
 	atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status);
 }
 
 static void zfcp_erp_port_unblock(struct zfcp_port *port)
 {
 	if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &port->status))
-		zfcp_rec_dbf_event_port("erpubl1", NULL, port);
+		zfcp_dbf_rec_port("erpubl1", NULL, port);
 	atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &port->status);
 }
 
 static void zfcp_erp_unit_unblock(struct zfcp_unit *unit)
 {
 	if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &unit->status))
-		zfcp_rec_dbf_event_unit("eruubl1", NULL, unit);
+		zfcp_dbf_rec_unit("eruubl1", NULL, unit);
 	atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &unit->status);
 }
 
 static void zfcp_erp_action_to_running(struct zfcp_erp_action *erp_action)
 {
 	list_move(&erp_action->list, &erp_action->adapter->erp_running_head);
-	zfcp_rec_dbf_event_action("erator1", erp_action);
+	zfcp_dbf_rec_action("erator1", erp_action);
 }
 
 static void zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *act)
@@ -479,11 +478,11 @@ static void zfcp_erp_strategy_check_fsfr
 		if (act->status & (ZFCP_STATUS_ERP_DISMISSED |
 				   ZFCP_STATUS_ERP_TIMEDOUT)) {
 			act->fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
-			zfcp_rec_dbf_event_action("erscf_1", act);
+			zfcp_dbf_rec_action("erscf_1", act);
 			act->fsf_req->erp_action = NULL;
 		}
 		if (act->status & ZFCP_STATUS_ERP_TIMEDOUT)
-			zfcp_rec_dbf_event_action("erscf_2", act);
+			zfcp_dbf_rec_action("erscf_2", act);
 		if (act->fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED)
 			act->fsf_req = NULL;
 	} else
@@ -641,9 +640,9 @@ static int zfcp_erp_adapter_strat_fsf_xc
 			return ZFCP_ERP_FAILED;
 		}
 
-		zfcp_rec_dbf_event_thread_lock("erasfx1", adapter);
+		zfcp_dbf_rec_thread_lock("erasfx1", adapter->dbf);
 		down(&adapter->erp_ready_sem);
-		zfcp_rec_dbf_event_thread_lock("erasfx2", adapter);
+		zfcp_dbf_rec_thread_lock("erasfx2", adapter->dbf);
 		if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT)
 			break;
 
@@ -682,9 +681,9 @@ static int zfcp_erp_adapter_strategy_ope
 	if (ret)
 		return ZFCP_ERP_FAILED;
 
-	zfcp_rec_dbf_event_thread_lock("erasox1", adapter);
+	zfcp_dbf_rec_thread_lock("erasox1", adapter->dbf);
 	down(&adapter->erp_ready_sem);
-	zfcp_rec_dbf_event_thread_lock("erasox2", adapter);
+	zfcp_dbf_rec_thread_lock("erasox2", adapter->dbf);
 	if (act->status & ZFCP_STATUS_ERP_TIMEDOUT)
 		return ZFCP_ERP_FAILED;
 
@@ -1138,7 +1137,7 @@ static void zfcp_erp_action_dequeue(stru
 	}
 
 	list_del(&erp_action->list);
-	zfcp_rec_dbf_event_action("eractd1", erp_action);
+	zfcp_dbf_rec_action("eractd1", erp_action);
 
 	switch (erp_action->action) {
 	case ZFCP_ERP_ACTION_REOPEN_UNIT:
@@ -1297,9 +1296,9 @@ static int zfcp_erp_thread(void *data)
 	while (!(atomic_read(&adapter->status) &
 		 ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL)) {
 
-		zfcp_rec_dbf_event_thread_lock("erthrd1", adapter);
+		zfcp_dbf_rec_thread_lock("erthrd1", adapter->dbf);
 		ignore = down_interruptible(&adapter->erp_ready_sem);
-		zfcp_rec_dbf_event_thread_lock("erthrd2", adapter);
+		zfcp_dbf_rec_thread_lock("erthrd2", adapter->dbf);
 
 		write_lock_irqsave(&adapter->erp_lock, flags);
 		next = adapter->erp_ready_head.next;
@@ -1356,7 +1355,7 @@ void zfcp_erp_thread_kill(struct zfcp_ad
 {
 	atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL, &adapter->status);
 	up(&adapter->erp_ready_sem);
-	zfcp_rec_dbf_event_thread_lock("erthrk1", adapter);
+	zfcp_dbf_rec_thread_lock("erthrk1", adapter->dbf);
 
 	wait_event(adapter->erp_thread_wqh,
 		   !(atomic_read(&adapter->status) &
@@ -1431,11 +1430,11 @@ void zfcp_erp_modify_adapter_status(stru
 
 	if (set_or_clear == ZFCP_SET) {
 		if (status_change_set(mask, &adapter->status))
-			zfcp_rec_dbf_event_adapter(id, ref, adapter);
+			zfcp_dbf_rec_adapter(id, ref, adapter->dbf);
 		atomic_set_mask(mask, &adapter->status);
 	} else {
 		if (status_change_clear(mask, &adapter->status))
-			zfcp_rec_dbf_event_adapter(id, ref, adapter);
+			zfcp_dbf_rec_adapter(id, ref, adapter->dbf);
 		atomic_clear_mask(mask, &adapter->status);
 		if (mask & ZFCP_STATUS_COMMON_ERP_FAILED)
 			atomic_set(&adapter->erp_counter, 0);
@@ -1465,11 +1464,11 @@ void zfcp_erp_modify_port_status(struct 
 
 	if (set_or_clear == ZFCP_SET) {
 		if (status_change_set(mask, &port->status))
-			zfcp_rec_dbf_event_port(id, ref, port);
+			zfcp_dbf_rec_port(id, ref, port);
 		atomic_set_mask(mask, &port->status);
 	} else {
 		if (status_change_clear(mask, &port->status))
-			zfcp_rec_dbf_event_port(id, ref, port);
+			zfcp_dbf_rec_port(id, ref, port);
 		atomic_clear_mask(mask, &port->status);
 		if (mask & ZFCP_STATUS_COMMON_ERP_FAILED)
 			atomic_set(&port->erp_counter, 0);
@@ -1494,11 +1493,11 @@ void zfcp_erp_modify_unit_status(struct 
 {
 	if (set_or_clear == ZFCP_SET) {
 		if (status_change_set(mask, &unit->status))
-			zfcp_rec_dbf_event_unit(id, ref, unit);
+			zfcp_dbf_rec_unit(id, ref, unit);
 		atomic_set_mask(mask, &unit->status);
 	} else {
 		if (status_change_clear(mask, &unit->status))
-			zfcp_rec_dbf_event_unit(id, ref, unit);
+			zfcp_dbf_rec_unit(id, ref, unit);
 		atomic_clear_mask(mask, &unit->status);
 		if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) {
 			atomic_set(&unit->erp_counter, 0);
--- a/drivers/s390/scsi/zfcp_ext.h	2009-08-17 13:26:27.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_ext.h	2009-08-17 13:26:55.000000000 +0200
@@ -34,35 +34,31 @@ extern struct zfcp_adapter *zfcp_get_ada
 extern struct miscdevice zfcp_cfdc_misc;
 
 /* zfcp_dbf.c */
-extern int zfcp_adapter_debug_register(struct zfcp_adapter *);
-extern void zfcp_adapter_debug_unregister(struct zfcp_adapter *);
-extern void zfcp_rec_dbf_event_thread(char *, struct zfcp_adapter *);
-extern void zfcp_rec_dbf_event_thread_lock(char *, struct zfcp_adapter *);
-extern void zfcp_rec_dbf_event_adapter(char *, void *, struct zfcp_adapter *);
-extern void zfcp_rec_dbf_event_port(char *, void *, struct zfcp_port *);
-extern void zfcp_rec_dbf_event_unit(char *, void *, struct zfcp_unit *);
-extern void zfcp_rec_dbf_event_trigger(char *, void *, u8, u8, void *,
-				       struct zfcp_adapter *,
-				       struct zfcp_port *, struct zfcp_unit *);
-extern void zfcp_rec_dbf_event_action(char *, struct zfcp_erp_action *);
-extern void _zfcp_hba_dbf_event_fsf_response(const char *, int level,
-					     struct zfcp_fsf_req *,
-					     struct zfcp_dbf *dbf);
-extern void _zfcp_hba_dbf_event_fsf_unsol(const char *, int level,
-					  struct zfcp_adapter *,
+extern int zfcp_dbf_adapter_register(struct zfcp_adapter *);
+extern void zfcp_dbf_adapter_unregister(struct zfcp_dbf *);
+extern void zfcp_dbf_rec_thread(char *, struct zfcp_dbf *);
+extern void zfcp_dbf_rec_thread_lock(char *, struct zfcp_dbf *);
+extern void zfcp_dbf_rec_adapter(char *, void *, struct zfcp_dbf *);
+extern void zfcp_dbf_rec_port(char *, void *, struct zfcp_port *);
+extern void zfcp_dbf_rec_unit(char *, void *, struct zfcp_unit *);
+extern void zfcp_dbf_rec_trigger(char *, void *, u8, u8, void *,
+				 struct zfcp_adapter *, struct zfcp_port *,
+				 struct zfcp_unit *);
+extern void zfcp_dbf_rec_action(char *, struct zfcp_erp_action *);
+extern void _zfcp_dbf_hba_fsf_response(const char *, int, struct zfcp_fsf_req *,
+				       struct zfcp_dbf *);
+extern void _zfcp_dbf_hba_fsf_unsol(const char *, int level, struct zfcp_dbf *,
 					  struct fsf_status_read_buffer *);
-extern void zfcp_hba_dbf_event_qdio(struct zfcp_qdio *, unsigned int, int,
-				    int);
-extern void zfcp_hba_dbf_event_berr(struct zfcp_adapter *,
-				    struct zfcp_fsf_req *);
-extern void zfcp_san_dbf_event_ct_request(struct zfcp_fsf_req *);
-extern void zfcp_san_dbf_event_ct_response(struct zfcp_fsf_req *);
-extern void zfcp_san_dbf_event_els_request(struct zfcp_fsf_req *);
-extern void zfcp_san_dbf_event_els_response(struct zfcp_fsf_req *);
-extern void zfcp_san_dbf_event_incoming_els(struct zfcp_fsf_req *);
-extern void _zfcp_scsi_dbf_event(const char *, const char *, int,
-				 struct zfcp_dbf *, struct scsi_cmnd *,
-				 struct zfcp_fsf_req *, unsigned long);
+extern void zfcp_dbf_hba_qdio(struct zfcp_dbf *, unsigned int, int, int);
+extern void zfcp_dbf_hba_berr(struct zfcp_dbf *, struct zfcp_fsf_req *);
+extern void zfcp_dbf_san_ct_request(struct zfcp_fsf_req *);
+extern void zfcp_dbf_san_ct_response(struct zfcp_fsf_req *);
+extern void zfcp_dbf_san_els_request(struct zfcp_fsf_req *);
+extern void zfcp_dbf_san_els_response(struct zfcp_fsf_req *);
+extern void zfcp_dbf_san_incoming_els(struct zfcp_fsf_req *);
+extern void _zfcp_dbf_scsi(const char *, const char *, int, struct zfcp_dbf *,
+			   struct scsi_cmnd *, struct zfcp_fsf_req *,
+			   unsigned long);
 
 /* zfcp_erp.c */
 extern void zfcp_erp_modify_adapter_status(struct zfcp_adapter *, char *,
--- a/drivers/s390/scsi/zfcp_fc.c	2009-08-17 13:26:27.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fc.c	2009-08-17 13:26:55.000000000 +0200
@@ -242,7 +242,7 @@ void zfcp_fc_incoming_els(struct zfcp_fs
 		(struct fsf_status_read_buffer *) fsf_req->data;
 	unsigned int els_type = status_buffer->payload.data[0];
 
-	zfcp_san_dbf_event_incoming_els(fsf_req);
+	zfcp_dbf_san_incoming_els(fsf_req);
 	if (els_type == LS_PLOGI)
 		zfcp_fc_incoming_plogi(fsf_req);
 	else if (els_type == LS_LOGO)
--- a/drivers/s390/scsi/zfcp_fsf.c	2009-08-17 13:26:27.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fsf.c	2009-08-17 13:26:55.000000000 +0200
@@ -248,13 +248,13 @@ static void zfcp_fsf_status_read_handler
 	struct fsf_status_read_buffer *sr_buf = req->data;
 
 	if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
-		zfcp_hba_dbf_event_fsf_unsol("dism", adapter, sr_buf);
+		zfcp_dbf_hba_fsf_unsol("dism", adapter->dbf, sr_buf);
 		mempool_free(sr_buf, adapter->pool.status_read_data);
 		zfcp_fsf_req_free(req);
 		return;
 	}
 
-	zfcp_hba_dbf_event_fsf_unsol("read", adapter, sr_buf);
+	zfcp_dbf_hba_fsf_unsol("read", adapter->dbf, sr_buf);
 
 	switch (sr_buf->status_type) {
 	case FSF_STATUS_READ_PORT_CLOSED:
@@ -269,7 +269,7 @@ static void zfcp_fsf_status_read_handler
 		dev_warn(&adapter->ccw_device->dev,
 			 "The error threshold for checksum statistics "
 			 "has been exceeded\n");
-		zfcp_hba_dbf_event_berr(adapter, req);
+		zfcp_dbf_hba_berr(adapter->dbf, req);
 		break;
 	case FSF_STATUS_READ_LINK_DOWN:
 		zfcp_fsf_status_read_link_down(req);
@@ -355,7 +355,7 @@ static void zfcp_fsf_protstatus_eval(str
 	struct fsf_qtcb *qtcb = req->qtcb;
 	union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
 
-	zfcp_hba_dbf_event_fsf_response(req);
+	zfcp_dbf_hba_fsf_response(req);
 
 	if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 		req->status |= ZFCP_STATUS_FSFREQ_ERROR |
@@ -848,7 +848,7 @@ failed_req_send:
 	mempool_free(sr_buf, adapter->pool.status_read_data);
 failed_buf:
 	zfcp_fsf_req_free(req);
-	zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
+	zfcp_dbf_hba_fsf_unsol("fail", adapter->dbf, NULL);
 out:
 	spin_unlock_bh(&qdio->req_q_lock);
 	return retval;
@@ -968,7 +968,7 @@ static void zfcp_fsf_send_ct_handler(str
 
 	switch (header->fsf_status) {
         case FSF_GOOD:
-		zfcp_san_dbf_event_ct_response(req);
+		zfcp_dbf_san_ct_response(req);
 		send_ct->status = 0;
 		break;
         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
@@ -1100,7 +1100,7 @@ int zfcp_fsf_send_ct(struct zfcp_send_ct
 	req->qtcb->bottom.support.timeout = ct->timeout;
 	req->data = ct;
 
-	zfcp_san_dbf_event_ct_request(req);
+	zfcp_dbf_san_ct_request(req);
 	zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
 
 	ret = zfcp_fsf_req_send(req);
@@ -1129,7 +1129,7 @@ static void zfcp_fsf_send_els_handler(st
 
 	switch (header->fsf_status) {
 	case FSF_GOOD:
-		zfcp_san_dbf_event_els_response(req);
+		zfcp_dbf_san_els_response(req);
 		send_els->status = 0;
 		break;
 	case FSF_SERVICE_CLASS_NOT_SUPPORTED:
@@ -1203,7 +1203,7 @@ int zfcp_fsf_send_els(struct zfcp_send_e
 	bottom->timeout = 2 * R_A_TOV;
 	req->data = els;
 
-	zfcp_san_dbf_event_els_request(req);
+	zfcp_dbf_san_els_request(req);
 
 	zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
 	ret = zfcp_fsf_req_send(req);
@@ -2213,11 +2213,11 @@ static void zfcp_fsf_send_fcp_command_ta
 	}
 skip_fsfstatus:
 	if (scpnt->result != 0)
-		zfcp_scsi_dbf_event_result("erro", 3, req->adapter, scpnt, req);
+		zfcp_dbf_scsi_result("erro", 3, req->adapter->dbf, scpnt, req);
 	else if (scpnt->retries > 0)
-		zfcp_scsi_dbf_event_result("retr", 4, req->adapter, scpnt, req);
+		zfcp_dbf_scsi_result("retr", 4, req->adapter->dbf, scpnt, req);
 	else
-		zfcp_scsi_dbf_event_result("norm", 6, req->adapter, scpnt, req);
+		zfcp_dbf_scsi_result("norm", 6, req->adapter->dbf, scpnt, req);
 
 	scpnt->host_scribble = NULL;
 	(scpnt->scsi_done) (scpnt);
--- a/drivers/s390/scsi/zfcp_qdio.c	2009-08-17 13:26:27.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_qdio.c	2009-08-17 13:26:55.000000000 +0200
@@ -101,7 +101,8 @@ static void zfcp_qdio_int_req(struct ccw
 	struct zfcp_qdio_queue *queue = &qdio->req_q;
 
 	if (unlikely(qdio_err)) {
-		zfcp_hba_dbf_event_qdio(qdio, qdio_err, first, count);
+		zfcp_dbf_hba_qdio(qdio->adapter->dbf, qdio_err, first,
+					count);
 		zfcp_qdio_handler_error(qdio, "qdireq1");
 		return;
 	}
@@ -143,7 +144,8 @@ static void zfcp_qdio_int_resp(struct cc
 	int sbal_idx, sbal_no;
 
 	if (unlikely(qdio_err)) {
-		zfcp_hba_dbf_event_qdio(qdio, qdio_err, first, count);
+		zfcp_dbf_hba_qdio(qdio->adapter->dbf, qdio_err, first,
+					count);
 		zfcp_qdio_handler_error(qdio, "qdires1");
 		return;
 	}
--- a/drivers/s390/scsi/zfcp_scsi.c	2009-08-17 13:26:27.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_scsi.c	2009-08-17 13:26:55.000000000 +0200
@@ -53,11 +53,11 @@ static int zfcp_scsi_slave_configure(str
 
 static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result)
 {
+	struct zfcp_adapter *adapter =
+		(struct zfcp_adapter *) scpnt->device->host->hostdata[0];
 	set_host_byte(scpnt, result);
 	if ((scpnt->device != NULL) && (scpnt->device->host != NULL))
-		zfcp_scsi_dbf_event_result("fail", 4,
-			(struct zfcp_adapter*) scpnt->device->host->hostdata[0],
-			scpnt, NULL);
+		zfcp_dbf_scsi_result("fail", 4, adapter->dbf, scpnt, NULL);
 	/* return directly */
 	scpnt->scsi_done(scpnt);
 }
@@ -93,7 +93,7 @@ static int zfcp_scsi_queuecommand(struct
 	scsi_result = fc_remote_port_chkready(rport);
 	if (unlikely(scsi_result)) {
 		scpnt->result = scsi_result;
-		zfcp_scsi_dbf_event_result("fail", 4, adapter, scpnt, NULL);
+		zfcp_dbf_scsi_result("fail", 4, adapter->dbf, scpnt, NULL);
 		scpnt->scsi_done(scpnt);
 		return 0;
 	}
@@ -181,8 +181,8 @@ static int zfcp_scsi_eh_abort_handler(st
 	spin_unlock(&adapter->req_list_lock);
 	if (!old_req) {
 		write_unlock_irqrestore(&adapter->abort_lock, flags);
-		zfcp_scsi_dbf_event_abort("lte1", adapter, scpnt, NULL,
-					  old_reqid);
+		zfcp_dbf_scsi_abort("lte1", adapter->dbf, scpnt, NULL,
+				    old_reqid);
 		return FAILED; /* completion could be in progress */
 	}
 	old_req->data = NULL;
@@ -198,8 +198,8 @@ static int zfcp_scsi_eh_abort_handler(st
 		zfcp_erp_wait(adapter);
 		if (!(atomic_read(&adapter->status) &
 		      ZFCP_STATUS_COMMON_RUNNING)) {
-			zfcp_scsi_dbf_event_abort("nres", adapter, scpnt, NULL,
-						  old_reqid);
+			zfcp_dbf_scsi_abort("nres", adapter->dbf, scpnt, NULL,
+					    old_reqid);
 			return SUCCESS;
 		}
 	}
@@ -216,7 +216,7 @@ static int zfcp_scsi_eh_abort_handler(st
 		dbf_tag = "fail";
 		retval = FAILED;
 	}
-	zfcp_scsi_dbf_event_abort(dbf_tag, adapter, scpnt, abrt_req, old_reqid);
+	zfcp_dbf_scsi_abort(dbf_tag, adapter->dbf, scpnt, abrt_req, old_reqid);
 	zfcp_fsf_req_free(abrt_req);
 	return retval;
 }
@@ -237,8 +237,7 @@ static int zfcp_task_mgmt_function(struc
 		zfcp_erp_wait(adapter);
 		if (!(atomic_read(&adapter->status) &
 		      ZFCP_STATUS_COMMON_RUNNING)) {
-			zfcp_scsi_dbf_event_devreset("nres", tm_flags, unit,
-						     scpnt);
+			zfcp_dbf_scsi_devreset("nres", tm_flags, unit, scpnt);
 			return SUCCESS;
 		}
 	}
@@ -248,13 +247,13 @@ static int zfcp_task_mgmt_function(struc
 	wait_for_completion(&fsf_req->completion);
 
 	if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) {
-		zfcp_scsi_dbf_event_devreset("fail", tm_flags, unit, scpnt);
+		zfcp_dbf_scsi_devreset("fail", tm_flags, unit, scpnt);
 		retval = FAILED;
 	} else if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP) {
-		zfcp_scsi_dbf_event_devreset("nsup", tm_flags, unit, scpnt);
+		zfcp_dbf_scsi_devreset("nsup", tm_flags, unit, scpnt);
 		retval = FAILED;
 	} else
-		zfcp_scsi_dbf_event_devreset("okay", tm_flags, unit, scpnt);
+		zfcp_dbf_scsi_devreset("okay", tm_flags, unit, scpnt);
 
 	zfcp_fsf_req_free(fsf_req);
 	return retval;

[patch 17/27] zfcp: introduce _setup, _destroy for qdio and FC

[Christof Schmitt]

[-- Attachment #1: 718-zfcp-setup-destroy.diff --]
[-- Type: text/plain, Size: 8554 bytes --]

From: Swen Schillig <swen@vnet.ibm.com>

Extract independent data structures and introduce common _setup and
_destroy routines for QDIO and Fibre Channel related data structures

Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---

 drivers/s390/scsi/zfcp_aux.c  |   42 ++++++++-----------------
 drivers/s390/scsi/zfcp_ext.h  |    7 ++--
 drivers/s390/scsi/zfcp_fc.c   |   36 +++++++++++++++-------
 drivers/s390/scsi/zfcp_qdio.c |   68 ++++++++++++++++++++++++++++--------------
 4 files changed, 89 insertions(+), 64 deletions(-)

--- a/drivers/s390/scsi/zfcp_aux.c	2009-08-17 11:29:38.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_aux.c	2009-08-17 11:29:45.000000000 +0200
@@ -506,30 +506,18 @@ int zfcp_adapter_enqueue(struct ccw_devi
 	if (!adapter)
 		return -ENOMEM;
 
-	adapter->gs = kzalloc(sizeof(struct zfcp_wka_ports), GFP_KERNEL);
-	if (!adapter->gs) {
-		kfree(adapter);
-		return -ENOMEM;
-	}
-
-	adapter->qdio = kzalloc(sizeof(struct zfcp_qdio), GFP_KERNEL);
-	if (!adapter->qdio)
-		goto qdio_mem_failed;
-
-	adapter->qdio->adapter = adapter;
-
 	ccw_device->handler = NULL;
 	adapter->ccw_device = ccw_device;
 	atomic_set(&adapter->refcount, 0);
 
-	if (zfcp_qdio_allocate(adapter->qdio, ccw_device))
-		goto qdio_allocate_failed;
+	if (zfcp_qdio_setup(adapter))
+		goto qdio_failed;
 
 	if (zfcp_allocate_low_mem_buffers(adapter))
-		goto failed_low_mem_buffers;
+		goto low_mem_buffers_failed;
 
 	if (zfcp_reqlist_alloc(adapter))
-		goto failed_low_mem_buffers;
+		goto low_mem_buffers_failed;
 
 	if (zfcp_dbf_adapter_register(adapter))
 		goto debug_register_failed;
@@ -537,6 +525,9 @@ int zfcp_adapter_enqueue(struct ccw_devi
 	if (zfcp_setup_adapter_work_queue(adapter))
 		goto work_queue_failed;
 
+	if (zfcp_fc_gs_setup(adapter))
+		goto generic_services_failed;
+
 	init_waitqueue_head(&adapter->remove_wq);
 	init_waitqueue_head(&adapter->erp_thread_wqh);
 	init_waitqueue_head(&adapter->erp_done_wqh);
@@ -547,9 +538,6 @@ int zfcp_adapter_enqueue(struct ccw_devi
 
 	spin_lock_init(&adapter->req_list_lock);
 
-	spin_lock_init(&adapter->qdio->req_q_lock);
-	spin_lock_init(&adapter->qdio->stat_lock);
-
 	rwlock_init(&adapter->erp_lock);
 	rwlock_init(&adapter->abort_lock);
 
@@ -570,24 +558,23 @@ int zfcp_adapter_enqueue(struct ccw_devi
 		goto sysfs_failed;
 
 	atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status);
-	zfcp_fc_wka_ports_init(adapter);
 
 	if (!zfcp_adapter_scsi_register(adapter))
 		return 0;
 
 sysfs_failed:
+	zfcp_fc_gs_destroy(adapter);
+generic_services_failed:
 	zfcp_destroy_adapter_work_queue(adapter);
 work_queue_failed:
 	zfcp_dbf_adapter_unregister(adapter->dbf);
 debug_register_failed:
 	dev_set_drvdata(&ccw_device->dev, NULL);
 	kfree(adapter->req_list);
-failed_low_mem_buffers:
+low_mem_buffers_failed:
 	zfcp_free_low_mem_buffers(adapter);
-qdio_allocate_failed:
-	zfcp_qdio_free(adapter->qdio);
-	kfree(adapter->qdio);
-qdio_mem_failed:
+qdio_failed:
+	zfcp_qdio_destroy(adapter->qdio);
 	kfree(adapter);
 	return -ENOMEM;
 }
@@ -616,15 +603,14 @@ void zfcp_adapter_dequeue(struct zfcp_ad
 	if (!retval)
 		return;
 
+	zfcp_fc_gs_destroy(adapter);
 	zfcp_destroy_adapter_work_queue(adapter);
 	zfcp_dbf_adapter_unregister(adapter->dbf);
-	zfcp_qdio_free(adapter->qdio);
 	zfcp_free_low_mem_buffers(adapter);
+	zfcp_qdio_destroy(adapter->qdio);
 	kfree(adapter->req_list);
 	kfree(adapter->fc_stats);
 	kfree(adapter->stats_reset_data);
-	kfree(adapter->gs);
-	kfree(adapter->qdio);
 	kfree(adapter);
 }
 
--- a/drivers/s390/scsi/zfcp_ext.h	2009-08-17 11:29:38.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_ext.h	2009-08-17 11:29:45.000000000 +0200
@@ -100,7 +100,8 @@ extern void zfcp_fc_plogi_evaluate(struc
 extern void zfcp_test_link(struct zfcp_port *);
 extern void zfcp_fc_link_test_work(struct work_struct *);
 extern void zfcp_fc_wka_ports_force_offline(struct zfcp_wka_ports *);
-extern void zfcp_fc_wka_ports_init(struct zfcp_adapter *);
+extern int zfcp_fc_gs_setup(struct zfcp_adapter *);
+extern void zfcp_fc_gs_destroy(struct zfcp_adapter *);
 extern int zfcp_fc_execute_els_fc_job(struct fc_bsg_job *);
 extern int zfcp_fc_execute_ct_fc_job(struct fc_bsg_job *);
 
@@ -134,8 +135,8 @@ extern struct zfcp_fsf_req *zfcp_fsf_abo
 extern void zfcp_fsf_reqid_check(struct zfcp_qdio *, int);
 
 /* zfcp_qdio.c */
-extern int zfcp_qdio_allocate(struct zfcp_qdio *, struct ccw_device *);
-extern void zfcp_qdio_free(struct zfcp_qdio *);
+extern int zfcp_qdio_setup(struct zfcp_adapter *);
+extern void zfcp_qdio_destroy(struct zfcp_qdio *);
 extern int zfcp_qdio_send(struct zfcp_qdio *, struct zfcp_queue_req *);
 extern struct qdio_buffer_element
 	*zfcp_qdio_sbale_req(struct zfcp_qdio *, struct zfcp_queue_req *);
--- a/drivers/s390/scsi/zfcp_fc.c	2009-08-17 11:29:38.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fc.c	2009-08-17 11:29:45.000000000 +0200
@@ -141,17 +141,6 @@ void zfcp_fc_wka_ports_force_offline(str
 	zfcp_fc_wka_port_force_offline(&gs->ks);
 }
 
-void zfcp_fc_wka_ports_init(struct zfcp_adapter *adapter)
-{
-	struct zfcp_wka_ports *gs = adapter->gs;
-
-	zfcp_fc_wka_port_init(&gs->ms, FC_FID_MGMT_SERV, adapter);
-	zfcp_fc_wka_port_init(&gs->ts, FC_FID_TIME_SERV, adapter);
-	zfcp_fc_wka_port_init(&gs->ds, FC_FID_DIR_SERV, adapter);
-	zfcp_fc_wka_port_init(&gs->as, FC_FID_ALIASES, adapter);
-	zfcp_fc_wka_port_init(&gs->ks, FC_FID_SEC_KEY, adapter);
-}
-
 static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range,
 				   struct fcp_rscn_element *elem)
 {
@@ -870,3 +859,28 @@ int zfcp_fc_execute_ct_fc_job(struct fc_
 	}
 	return ret;
 }
+
+int zfcp_fc_gs_setup(struct zfcp_adapter *adapter)
+{
+	struct zfcp_wka_ports *wka_ports;
+
+	wka_ports = kzalloc(sizeof(struct zfcp_wka_ports), GFP_KERNEL);
+	if (!wka_ports)
+		return -ENOMEM;
+
+	adapter->gs = wka_ports;
+	zfcp_fc_wka_port_init(&wka_ports->ms, FC_FID_MGMT_SERV, adapter);
+	zfcp_fc_wka_port_init(&wka_ports->ts, FC_FID_TIME_SERV, adapter);
+	zfcp_fc_wka_port_init(&wka_ports->ds, FC_FID_DIR_SERV, adapter);
+	zfcp_fc_wka_port_init(&wka_ports->as, FC_FID_ALIASES, adapter);
+	zfcp_fc_wka_port_init(&wka_ports->ks, FC_FID_SEC_KEY, adapter);
+
+	return 0;
+}
+
+void zfcp_fc_gs_destroy(struct zfcp_adapter *adapter)
+{
+	kfree(adapter->gs);
+	adapter->gs = NULL;
+}
+
--- a/drivers/s390/scsi/zfcp_qdio.c	2009-08-17 11:29:38.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_qdio.c	2009-08-17 11:29:45.000000000 +0200
@@ -34,27 +34,6 @@ zfcp_qdio_sbale(struct zfcp_qdio_queue *
 	return &q->sbal[sbal_idx]->element[sbale_idx];
 }
 
-/**
- * zfcp_qdio_free - free memory used by request- and resposne queue
- * @qdio: pointer to the zfcp_qdio structure
- */
-void zfcp_qdio_free(struct zfcp_qdio *qdio)
-{
-	struct qdio_buffer **sbal_req, **sbal_resp;
-	int p;
-
-	if (qdio->adapter->ccw_device)
-		qdio_free(qdio->adapter->ccw_device);
-
-	sbal_req = qdio->req_q.sbal;
-	sbal_resp = qdio->resp_q.sbal;
-
-	for (p = 0; p < QDIO_MAX_BUFFERS_PER_Q; p += QBUFF_PER_PAGE) {
-		free_page((unsigned long) sbal_req[p]);
-		free_page((unsigned long) sbal_resp[p]);
-	}
-}
-
 static void zfcp_qdio_handler_error(struct zfcp_qdio *qdio, char *id)
 {
 	struct zfcp_adapter *adapter = qdio->adapter;
@@ -383,7 +362,7 @@ static void zfcp_qdio_setup_init_data(st
  * Returns: -ENOMEM on memory allocation error or return value from
  *          qdio_allocate
  */
-int zfcp_qdio_allocate(struct zfcp_qdio *qdio, struct ccw_device *ccw_dev)
+static int zfcp_qdio_allocate(struct zfcp_qdio *qdio)
 {
 	struct qdio_initialize init_data;
 
@@ -477,3 +456,48 @@ failed_establish:
 		"Setting up the QDIO connection to the FCP adapter failed\n");
 	return -EIO;
 }
+
+void zfcp_qdio_destroy(struct zfcp_qdio *qdio)
+{
+	struct qdio_buffer **sbal_req, **sbal_resp;
+	int p;
+
+	if (!qdio)
+		return;
+
+	if (qdio->adapter->ccw_device)
+		qdio_free(qdio->adapter->ccw_device);
+
+	sbal_req = qdio->req_q.sbal;
+	sbal_resp = qdio->resp_q.sbal;
+
+	for (p = 0; p < QDIO_MAX_BUFFERS_PER_Q; p += QBUFF_PER_PAGE) {
+		free_page((unsigned long) sbal_req[p]);
+		free_page((unsigned long) sbal_resp[p]);
+	}
+
+	kfree(qdio);
+}
+
+int zfcp_qdio_setup(struct zfcp_adapter *adapter)
+{
+	struct zfcp_qdio *qdio;
+
+	qdio = kzalloc(sizeof(struct zfcp_qdio), GFP_KERNEL);
+	if (!qdio)
+		return -ENOMEM;
+
+	qdio->adapter = adapter;
+
+	if (zfcp_qdio_allocate(qdio)) {
+		zfcp_qdio_destroy(qdio);
+		return -ENOMEM;
+	}
+
+	spin_lock_init(&qdio->req_q_lock);
+	spin_lock_init(&qdio->stat_lock);
+
+	adapter->qdio = qdio;
+	return 0;
+}
+

[patch 18/27] zfcp: Apply common naming conventions to zfcp_fc

[Christof Schmitt]

[-- Attachment #1: 719-zfcp-naming-conventions.diff --]
[-- Type: text/plain, Size: 10551 bytes --]

From: Swen Schillig <swen@vnet.ibm.com>

Update the Fibre Channel related code to use the zfcp_fc prefix.

Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---

 drivers/s390/scsi/zfcp_aux.c   |    2 -
 drivers/s390/scsi/zfcp_ext.h   |    6 ++--
 drivers/s390/scsi/zfcp_fc.c    |   51 ++++++++++++++++++++---------------------
 drivers/s390/scsi/zfcp_fsf.c   |   10 ++++----
 drivers/s390/scsi/zfcp_sysfs.c |    2 -
 5 files changed, 35 insertions(+), 36 deletions(-)

--- a/drivers/s390/scsi/zfcp_aux.c	2009-08-18 13:45:37.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_aux.c	2009-08-18 13:45:43.000000000 +0200
@@ -544,7 +544,7 @@ int zfcp_adapter_enqueue(struct ccw_devi
 	sema_init(&adapter->erp_ready_sem, 0);
 
 	INIT_WORK(&adapter->stat_work, _zfcp_status_read_scheduler);
-	INIT_WORK(&adapter->scan_work, _zfcp_scan_ports_later);
+	INIT_WORK(&adapter->scan_work, _zfcp_fc_scan_ports_later);
 
 	adapter->service_level.seq_print = zfcp_print_sl;
 
--- a/drivers/s390/scsi/zfcp_ext.h	2009-08-18 13:45:37.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_ext.h	2009-08-18 13:46:24.000000000 +0200
@@ -92,12 +92,12 @@ extern void zfcp_erp_adapter_access_chan
 extern void zfcp_erp_timeout_handler(unsigned long);
 
 /* zfcp_fc.c */
-extern int zfcp_scan_ports(struct zfcp_adapter *);
-extern void _zfcp_scan_ports_later(struct work_struct *);
+extern int zfcp_fc_scan_ports(struct zfcp_adapter *);
+extern void _zfcp_fc_scan_ports_later(struct work_struct *);
 extern void zfcp_fc_incoming_els(struct zfcp_fsf_req *);
 extern void zfcp_fc_port_did_lookup(struct work_struct *);
 extern void zfcp_fc_plogi_evaluate(struct zfcp_port *, struct fsf_plogi *);
-extern void zfcp_test_link(struct zfcp_port *);
+extern void zfcp_fc_test_link(struct zfcp_port *);
 extern void zfcp_fc_link_test_work(struct work_struct *);
 extern void zfcp_fc_wka_ports_force_offline(struct zfcp_wka_ports *);
 extern int zfcp_fc_gs_setup(struct zfcp_adapter *);
--- a/drivers/s390/scsi/zfcp_fc.c	2009-08-18 13:45:37.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fc.c	2009-08-18 13:45:43.000000000 +0200
@@ -57,7 +57,7 @@ struct zfcp_fc_ns_handler_data {
 	unsigned long handler_data;
 };
 
-static int zfcp_wka_port_get(struct zfcp_wka_port *wka_port)
+static int zfcp_fc_wka_port_get(struct zfcp_wka_port *wka_port)
 {
 	if (mutex_lock_interruptible(&wka_port->mutex))
 		return -ERESTARTSYS;
@@ -82,7 +82,7 @@ static int zfcp_wka_port_get(struct zfcp
 	return -EIO;
 }
 
-static void zfcp_wka_port_offline(struct work_struct *work)
+static void zfcp_fc_wka_port_offline(struct work_struct *work)
 {
 	struct delayed_work *dw = to_delayed_work(work);
 	struct zfcp_wka_port *wka_port =
@@ -102,7 +102,7 @@ out:
 	mutex_unlock(&wka_port->mutex);
 }
 
-static void zfcp_wka_port_put(struct zfcp_wka_port *wka_port)
+static void zfcp_fc_wka_port_put(struct zfcp_wka_port *wka_port)
 {
 	if (atomic_dec_return(&wka_port->refcount) != 0)
 		return;
@@ -121,7 +121,7 @@ static void zfcp_fc_wka_port_init(struct
 	wka_port->status = ZFCP_WKA_PORT_OFFLINE;
 	atomic_set(&wka_port->refcount, 0);
 	mutex_init(&wka_port->mutex);
-	INIT_DELAYED_WORK(&wka_port->work, zfcp_wka_port_offline);
+	INIT_DELAYED_WORK(&wka_port->work, zfcp_fc_wka_port_offline);
 }
 
 static void zfcp_fc_wka_port_force_offline(struct zfcp_wka_port *wka)
@@ -150,7 +150,7 @@ static void _zfcp_fc_incoming_rscn(struc
 	read_lock_irqsave(&zfcp_data.config_lock, flags);
 	list_for_each_entry(port, &fsf_req->adapter->port_list_head, list) {
 		if ((port->d_id & range) == (elem->nport_did & range))
-			zfcp_test_link(port);
+			zfcp_fc_test_link(port);
 		if (!port->d_id)
 			zfcp_erp_port_reopen(port,
 					     ZFCP_STATUS_COMMON_ERP_FAILED,
@@ -326,13 +326,13 @@ static int zfcp_fc_ns_gid_pn(struct zfcp
 
 	memset(gid_pn, 0, sizeof(*gid_pn));
 
-	ret = zfcp_wka_port_get(&adapter->gs->ds);
+	ret = zfcp_fc_wka_port_get(&adapter->gs->ds);
 	if (ret)
 		goto out;
 
 	ret = zfcp_fc_ns_gid_pn_request(port, gid_pn);
 
-	zfcp_wka_port_put(&adapter->gs->ds);
+	zfcp_fc_wka_port_put(&adapter->gs->ds);
 out:
 	mempool_free(gid_pn, adapter->pool.gid_pn_data);
 	return ret;
@@ -482,14 +482,14 @@ out:
 }
 
 /**
- * zfcp_test_link - lightweight link test procedure
+ * zfcp_fc_test_link - lightweight link test procedure
  * @port: port to be tested
  *
  * Test status of a link to a remote port using the ELS command ADISC.
  * If there is a problem with the remote port, error recovery steps
  * will be triggered.
  */
-void zfcp_test_link(struct zfcp_port *port)
+void zfcp_fc_test_link(struct zfcp_port *port)
 {
 	zfcp_port_get(port);
 	if (!queue_work(port->adapter->work_queue, &port->test_link_work))
@@ -532,9 +532,8 @@ out:
 }
 
 
-static int zfcp_scan_issue_gpn_ft(struct zfcp_gpn_ft *gpn_ft,
-				  struct zfcp_adapter *adapter,
-				  int max_bytes)
+static int zfcp_fc_send_gpn_ft(struct zfcp_gpn_ft *gpn_ft,
+			       struct zfcp_adapter *adapter, int max_bytes)
 {
 	struct zfcp_send_ct *ct = &gpn_ft->ct;
 	struct ct_iu_gpn_ft_req *req = sg_virt(&gpn_ft->sg_req);
@@ -569,7 +568,7 @@ static int zfcp_scan_issue_gpn_ft(struct
 	return ret;
 }
 
-static void zfcp_validate_port(struct zfcp_port *port)
+static void zfcp_fc_validate_port(struct zfcp_port *port)
 {
 	struct zfcp_adapter *adapter = port->adapter;
 
@@ -589,7 +588,7 @@ static void zfcp_validate_port(struct zf
 	zfcp_port_dequeue(port);
 }
 
-static int zfcp_scan_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft, int max_entries)
+static int zfcp_fc_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft, int max_entries)
 {
 	struct zfcp_send_ct *ct = &gpn_ft->ct;
 	struct scatterlist *sg = gpn_ft->sg_resp;
@@ -649,16 +648,16 @@ static int zfcp_scan_eval_gpn_ft(struct 
 
 	zfcp_erp_wait(adapter);
 	list_for_each_entry_safe(port, tmp, &adapter->port_list_head, list)
-		zfcp_validate_port(port);
+		zfcp_fc_validate_port(port);
 	up(&zfcp_data.config_sema);
 	return ret;
 }
 
 /**
- * zfcp_scan_ports - scan remote ports and attach new ports
+ * zfcp_fc_scan_ports - scan remote ports and attach new ports
  * @adapter: pointer to struct zfcp_adapter
  */
-int zfcp_scan_ports(struct zfcp_adapter *adapter)
+int zfcp_fc_scan_ports(struct zfcp_adapter *adapter)
 {
 	int ret, i;
 	struct zfcp_gpn_ft *gpn_ft;
@@ -673,7 +672,7 @@ int zfcp_scan_ports(struct zfcp_adapter 
 	    fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV)
 		return 0;
 
-	ret = zfcp_wka_port_get(&adapter->gs->ds);
+	ret = zfcp_fc_wka_port_get(&adapter->gs->ds);
 	if (ret)
 		return ret;
 
@@ -684,9 +683,9 @@ int zfcp_scan_ports(struct zfcp_adapter 
 	}
 
 	for (i = 0; i < 3; i++) {
-		ret = zfcp_scan_issue_gpn_ft(gpn_ft, adapter, max_bytes);
+		ret = zfcp_fc_send_gpn_ft(gpn_ft, adapter, max_bytes);
 		if (!ret) {
-			ret = zfcp_scan_eval_gpn_ft(gpn_ft, max_entries);
+			ret = zfcp_fc_eval_gpn_ft(gpn_ft, max_entries);
 			if (ret == -EAGAIN)
 				ssleep(1);
 			else
@@ -695,14 +694,14 @@ int zfcp_scan_ports(struct zfcp_adapter 
 	}
 	zfcp_free_sg_env(gpn_ft, buf_num);
 out:
-	zfcp_wka_port_put(&adapter->gs->ds);
+	zfcp_fc_wka_port_put(&adapter->gs->ds);
 	return ret;
 }
 
 
-void _zfcp_scan_ports_later(struct work_struct *work)
+void _zfcp_fc_scan_ports_later(struct work_struct *work)
 {
-	zfcp_scan_ports(container_of(work, struct zfcp_adapter, scan_work));
+	zfcp_fc_scan_ports(container_of(work, struct zfcp_adapter, scan_work));
 }
 
 struct zfcp_els_fc_job {
@@ -792,7 +791,7 @@ static void zfcp_fc_generic_ct_handler(u
 	job->state_flags = FC_RQST_STATE_DONE;
 	job->job_done(job);
 
-	zfcp_wka_port_put(ct_fc_job->ct.wka_port);
+	zfcp_fc_wka_port_put(ct_fc_job->ct.wka_port);
 
 	kfree(ct_fc_job);
 }
@@ -838,7 +837,7 @@ int zfcp_fc_execute_ct_fc_job(struct fc_
 		return -EINVAL; /* no such service */
 	}
 
-	ret = zfcp_wka_port_get(ct_fc_job->ct.wka_port);
+	ret = zfcp_fc_wka_port_get(ct_fc_job->ct.wka_port);
 	if (ret) {
 		kfree(ct_fc_job);
 		return ret;
@@ -855,7 +854,7 @@ int zfcp_fc_execute_ct_fc_job(struct fc_
 	ret = zfcp_fsf_send_ct(&ct_fc_job->ct, NULL);
 	if (ret) {
 		kfree(ct_fc_job);
-		zfcp_wka_port_put(ct_fc_job->ct.wka_port);
+		zfcp_fc_wka_port_put(ct_fc_job->ct.wka_port);
 	}
 	return ret;
 }
--- a/drivers/s390/scsi/zfcp_fsf.c	2009-08-18 13:45:37.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fsf.c	2009-08-18 13:45:43.000000000 +0200
@@ -892,7 +892,7 @@ static void zfcp_fsf_abort_fcp_command_h
 	case FSF_ADAPTER_STATUS_AVAILABLE:
 		switch (fsq->word[0]) {
 		case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
-			zfcp_test_link(unit->port);
+			zfcp_fc_test_link(unit->port);
 			/* fall through */
 		case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 			req->status |= ZFCP_STATUS_FSFREQ_ERROR;
@@ -1139,7 +1139,7 @@ static void zfcp_fsf_send_els_handler(st
 		switch (header->fsf_status_qual.word[0]){
 		case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 			if (port && (send_els->ls_code != ZFCP_LS_ADISC))
-				zfcp_test_link(port);
+				zfcp_fc_test_link(port);
 			/*fall through */
 		case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 		case FSF_SQ_RETRY_IF_POSSIBLE:
@@ -1889,7 +1889,7 @@ static void zfcp_fsf_open_unit_handler(s
 	case FSF_ADAPTER_STATUS_AVAILABLE:
 		switch (header->fsf_status_qual.word[0]) {
 		case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
-			zfcp_test_link(unit->port);
+			zfcp_fc_test_link(unit->port);
 			/* fall through */
 		case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 			req->status |= ZFCP_STATUS_FSFREQ_ERROR;
@@ -2024,7 +2024,7 @@ static void zfcp_fsf_close_unit_handler(
 	case FSF_ADAPTER_STATUS_AVAILABLE:
 		switch (req->qtcb->header.fsf_status_qual.word[0]) {
 		case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
-			zfcp_test_link(unit->port);
+			zfcp_fc_test_link(unit->port);
 			/* fall through */
 		case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 			req->status |= ZFCP_STATUS_FSFREQ_ERROR;
@@ -2307,7 +2307,7 @@ static void zfcp_fsf_send_fcp_command_ha
 	case FSF_ADAPTER_STATUS_AVAILABLE:
 		if (header->fsf_status_qual.word[0] ==
 		    FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
-			zfcp_test_link(unit->port);
+			zfcp_fc_test_link(unit->port);
 		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 		break;
 	}
--- a/drivers/s390/scsi/zfcp_sysfs.c	2009-08-18 12:08:02.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_sysfs.c	2009-08-18 13:45:43.000000000 +0200
@@ -126,7 +126,7 @@ static ssize_t zfcp_sysfs_port_rescan_st
 	if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_REMOVE)
 		return -EBUSY;
 
-	ret = zfcp_scan_ports(adapter);
+	ret = zfcp_fc_scan_ports(adapter);
 	return ret ? ret : (ssize_t) count;
 }
 static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL,

[patch 19/27] zfcp: resolve false usage of dd_data in fc_rport

[Christof Schmitt]

[-- Attachment #1: 720-zfcp-dd_data-usage.diff --]
[-- Type: text/plain, Size: 3657 bytes --]

From: Swen Schillig <swen@vnet.ibm.com>

The fc_rport structure reserves a reference where a LLD can put
information required in a situation where the fc transport class is
triggering LLD callbacks. The zfcp driver was using this variable
directly which is discouraged. This patch solves this issue by making
this reference unnecessary.  In addition the dev_loss_tmo callback is
removed, it is not required: zfcp does not access the fc_rport after
calling fc_remote_port_delete.

Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---

 drivers/s390/scsi/zfcp_aux.c  |    4 ----
 drivers/s390/scsi/zfcp_fc.c   |    2 +-
 drivers/s390/scsi/zfcp_scsi.c |   22 ++++------------------
 3 files changed, 5 insertions(+), 23 deletions(-)

--- a/drivers/s390/scsi/zfcp_aux.c	2009-08-17 13:28:26.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_aux.c	2009-08-17 13:28:26.000000000 +0200
@@ -709,10 +709,6 @@ void zfcp_port_dequeue(struct zfcp_port 
 	write_lock_irq(&zfcp_data.config_lock);
 	list_del(&port->list);
 	write_unlock_irq(&zfcp_data.config_lock);
-	if (port->rport) {
-		port->rport->dd_data = NULL;
-		port->rport = NULL;
-	}
 	wait_event(port->remove_wq, atomic_read(&port->refcount) == 0);
 	cancel_work_sync(&port->rport_work); /* usually not necessary */
 	zfcp_adapter_put(port->adapter);
--- a/drivers/s390/scsi/zfcp_fc.c	2009-08-17 13:28:26.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fc.c	2009-08-17 13:28:26.000000000 +0200
@@ -752,7 +752,7 @@ int zfcp_fc_execute_els_fc_job(struct fc
 	els_fc_job->els.adapter = adapter;
 	if (rport) {
 		read_lock_irq(&zfcp_data.config_lock);
-		port = rport->dd_data;
+		port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
 		if (port)
 			els_fc_job->els.d_id = port->d_id;
 		read_unlock_irq(&zfcp_data.config_lock);
--- a/drivers/s390/scsi/zfcp_scsi.c	2009-08-17 13:26:55.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_scsi.c	2009-08-17 13:34:37.000000000 +0200
@@ -491,21 +491,6 @@ static void zfcp_set_rport_dev_loss_tmo(
 }
 
 /**
- * zfcp_scsi_dev_loss_tmo_callbk - Free any reference to rport
- * @rport: The rport that is about to be deleted.
- */
-static void zfcp_scsi_dev_loss_tmo_callbk(struct fc_rport *rport)
-{
-	struct zfcp_port *port;
-
-	write_lock_irq(&zfcp_data.config_lock);
-	port = rport->dd_data;
-	if (port)
-		port->rport = NULL;
-	write_unlock_irq(&zfcp_data.config_lock);
-}
-
-/**
  * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport
  * @rport: The FC rport where to teminate I/O
  *
@@ -516,9 +501,12 @@ static void zfcp_scsi_dev_loss_tmo_callb
 static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport)
 {
 	struct zfcp_port *port;
+	struct Scsi_Host *shost = rport_to_shost(rport);
+	struct zfcp_adapter *adapter =
+		(struct zfcp_adapter *)shost->hostdata[0];
 
 	write_lock_irq(&zfcp_data.config_lock);
-	port = rport->dd_data;
+	port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
 	if (port)
 		zfcp_port_get(port);
 	write_unlock_irq(&zfcp_data.config_lock);
@@ -550,7 +538,6 @@ static void zfcp_scsi_rport_register(str
 		return;
 	}
 
-	rport->dd_data = port;
 	rport->maxframe_size = port->maxframe_size;
 	rport->supported_classes = port->supported_classes;
 	port->rport = rport;
@@ -663,7 +650,6 @@ struct fc_function_template zfcp_transpo
 	.reset_fc_host_stats = zfcp_reset_fc_host_stats,
 	.set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo,
 	.get_host_port_state = zfcp_get_host_port_state,
-	.dev_loss_tmo_callbk = zfcp_scsi_dev_loss_tmo_callbk,
 	.terminate_rport_io = zfcp_scsi_terminate_rport_io,
 	.show_host_port_state = 1,
 	.bsg_request = zfcp_execute_fc_job,

[patch 20/27] zfcp: Use kthread API for zfcp erp thread

[Christof Schmitt]

[-- Attachment #1: 722-zfcp-kthread-api.diff --]
[-- Type: text/plain, Size: 7456 bytes --]

From: Christof Schmitt <christof.schmitt@de.ibm.com>

Switch the creation of the zfcp erp thread from the deprecated
kernel_thread API to the kthread API. This allows also the removal of
some flags in zfcp since the kthread API handles thread creation and
shutdown internally. To allow the usage of the kthread_stop function,
replace the erp ready semaphore with a waitqueue for waiting until erp
actions arrive on the ready queue.

Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---

 drivers/s390/scsi/zfcp_aux.c |    4 --
 drivers/s390/scsi/zfcp_def.h |    6 +---
 drivers/s390/scsi/zfcp_erp.c |   62 ++++++++++++++++---------------------------
 3 files changed, 27 insertions(+), 45 deletions(-)

--- a/drivers/s390/scsi/zfcp_aux.c	2009-08-17 11:29:50.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_aux.c	2009-08-17 11:29:53.000000000 +0200
@@ -529,7 +529,7 @@ int zfcp_adapter_enqueue(struct ccw_devi
 		goto generic_services_failed;
 
 	init_waitqueue_head(&adapter->remove_wq);
-	init_waitqueue_head(&adapter->erp_thread_wqh);
+	init_waitqueue_head(&adapter->erp_ready_wq);
 	init_waitqueue_head(&adapter->erp_done_wqh);
 
 	INIT_LIST_HEAD(&adapter->port_list_head);
@@ -541,8 +541,6 @@ int zfcp_adapter_enqueue(struct ccw_devi
 	rwlock_init(&adapter->erp_lock);
 	rwlock_init(&adapter->abort_lock);
 
-	sema_init(&adapter->erp_ready_sem, 0);
-
 	INIT_WORK(&adapter->stat_work, _zfcp_status_read_scheduler);
 	INIT_WORK(&adapter->scan_work, _zfcp_fc_scan_ports_later);
 
--- a/drivers/s390/scsi/zfcp_def.h	2009-08-17 11:29:34.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_def.h	2009-08-17 11:29:53.000000000 +0200
@@ -222,8 +222,6 @@ struct zfcp_ls_adisc {
 #define ZFCP_STATUS_ADAPTER_QDIOUP		0x00000002
 #define ZFCP_STATUS_ADAPTER_XCONFIG_OK		0x00000008
 #define ZFCP_STATUS_ADAPTER_HOST_CON_INIT	0x00000010
-#define ZFCP_STATUS_ADAPTER_ERP_THREAD_UP	0x00000020
-#define ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL	0x00000080
 #define ZFCP_STATUS_ADAPTER_ERP_PENDING		0x00000100
 #define ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED	0x00000200
 
@@ -481,10 +479,9 @@ struct zfcp_adapter {
 	atomic_t		status;	           /* status of this adapter */
 	struct list_head	erp_ready_head;	   /* error recovery for this
 						      adapter/devices */
+	wait_queue_head_t	erp_ready_wq;
 	struct list_head	erp_running_head;
 	rwlock_t		erp_lock;
-	struct semaphore	erp_ready_sem;
-	wait_queue_head_t	erp_thread_wqh;
 	wait_queue_head_t	erp_done_wqh;
 	struct zfcp_erp_action	erp_action;	   /* pending error recovery */
         atomic_t                erp_counter;
@@ -492,6 +489,7 @@ struct zfcp_adapter {
 						      actions */
 	u32			erp_low_mem_count; /* nr of erp actions waiting
 						      for memory */
+	struct task_struct	*erp_thread;
 	struct zfcp_wka_ports	*gs;		   /* generic services */
 	struct zfcp_dbf		*dbf;		   /* debug traces */
 	struct zfcp_adapter_mempool	pool;      /* Adapter memory pools */
--- a/drivers/s390/scsi/zfcp_erp.c	2009-08-17 11:29:38.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_erp.c	2009-08-17 11:29:53.000000000 +0200
@@ -9,6 +9,7 @@
 #define KMSG_COMPONENT "zfcp"
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 
+#include <linux/kthread.h>
 #include "zfcp_ext.h"
 
 #define ZFCP_MAX_ERPS                   3
@@ -75,7 +76,7 @@ static void zfcp_erp_action_ready(struct
 
 	list_move(&act->list, &act->adapter->erp_ready_head);
 	zfcp_dbf_rec_action("erardy1", act);
-	up(&adapter->erp_ready_sem);
+	wake_up(&adapter->erp_ready_wq);
 	zfcp_dbf_rec_thread("erardy2", adapter->dbf);
 }
 
@@ -212,8 +213,7 @@ static int zfcp_erp_action_enqueue(int w
 	int retval = 1, need;
 	struct zfcp_erp_action *act = NULL;
 
-	if (!(atomic_read(&adapter->status) &
-	      ZFCP_STATUS_ADAPTER_ERP_THREAD_UP))
+	if (!adapter->erp_thread)
 		return -EIO;
 
 	need = zfcp_erp_required_act(want, adapter, port, unit);
@@ -226,7 +226,7 @@ static int zfcp_erp_action_enqueue(int w
 		goto out;
 	++adapter->erp_total_count;
 	list_add_tail(&act->list, &adapter->erp_ready_head);
-	up(&adapter->erp_ready_sem);
+	wake_up(&adapter->erp_ready_wq);
 	zfcp_dbf_rec_thread("eracte1", adapter->dbf);
 	retval = 0;
  out:
@@ -641,7 +641,8 @@ static int zfcp_erp_adapter_strat_fsf_xc
 		}
 
 		zfcp_dbf_rec_thread_lock("erasfx1", adapter->dbf);
-		down(&adapter->erp_ready_sem);
+		wait_event(adapter->erp_ready_wq,
+			   !list_empty(&adapter->erp_ready_head));
 		zfcp_dbf_rec_thread_lock("erasfx2", adapter->dbf);
 		if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT)
 			break;
@@ -682,7 +683,8 @@ static int zfcp_erp_adapter_strategy_ope
 		return ZFCP_ERP_FAILED;
 
 	zfcp_dbf_rec_thread_lock("erasox1", adapter->dbf);
-	down(&adapter->erp_ready_sem);
+	wait_event(adapter->erp_ready_wq,
+		   !list_empty(&adapter->erp_ready_head));
 	zfcp_dbf_rec_thread_lock("erasox2", adapter->dbf);
 	if (act->status & ZFCP_STATUS_ERP_TIMEDOUT)
 		return ZFCP_ERP_FAILED;
@@ -1285,21 +1287,17 @@ static int zfcp_erp_thread(void *data)
 	struct list_head *next;
 	struct zfcp_erp_action *act;
 	unsigned long flags;
-	int ignore;
-
-	daemonize("zfcperp%s", dev_name(&adapter->ccw_device->dev));
-	/* Block all signals */
-	siginitsetinv(&current->blocked, 0);
-	atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status);
-	wake_up(&adapter->erp_thread_wqh);
-
-	while (!(atomic_read(&adapter->status) &
-		 ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL)) {
 
+	for (;;) {
 		zfcp_dbf_rec_thread_lock("erthrd1", adapter->dbf);
-		ignore = down_interruptible(&adapter->erp_ready_sem);
+		wait_event_interruptible(adapter->erp_ready_wq,
+			   !list_empty(&adapter->erp_ready_head) ||
+			   kthread_should_stop());
 		zfcp_dbf_rec_thread_lock("erthrd2", adapter->dbf);
 
+		if (kthread_should_stop())
+			break;
+
 		write_lock_irqsave(&adapter->erp_lock, flags);
 		next = adapter->erp_ready_head.next;
 		write_unlock_irqrestore(&adapter->erp_lock, flags);
@@ -1313,9 +1311,6 @@ static int zfcp_erp_thread(void *data)
 		}
 	}
 
-	atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status);
-	wake_up(&adapter->erp_thread_wqh);
-
 	return 0;
 }
 
@@ -1327,18 +1322,17 @@ static int zfcp_erp_thread(void *data)
  */
 int zfcp_erp_thread_setup(struct zfcp_adapter *adapter)
 {
-	int retval;
+	struct task_struct *thread;
 
-	atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status);
-	retval = kernel_thread(zfcp_erp_thread, adapter, SIGCHLD);
-	if (retval < 0) {
+	thread = kthread_run(zfcp_erp_thread, adapter, "zfcperp%s",
+			     dev_name(&adapter->ccw_device->dev));
+	if (IS_ERR(thread)) {
 		dev_err(&adapter->ccw_device->dev,
 			"Creating an ERP thread for the FCP device failed.\n");
-		return retval;
+		return PTR_ERR(thread);
 	}
-	wait_event(adapter->erp_thread_wqh,
-		   atomic_read(&adapter->status) &
-			ZFCP_STATUS_ADAPTER_ERP_THREAD_UP);
+
+	adapter->erp_thread = thread;
 	return 0;
 }
 
@@ -1353,16 +1347,8 @@ int zfcp_erp_thread_setup(struct zfcp_ad
  */
 void zfcp_erp_thread_kill(struct zfcp_adapter *adapter)
 {
-	atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL, &adapter->status);
-	up(&adapter->erp_ready_sem);
-	zfcp_dbf_rec_thread_lock("erthrk1", adapter->dbf);
-
-	wait_event(adapter->erp_thread_wqh,
-		   !(atomic_read(&adapter->status) &
-				ZFCP_STATUS_ADAPTER_ERP_THREAD_UP));
-
-	atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL,
-			  &adapter->status);
+	kthread_stop(adapter->erp_thread);
+	adapter->erp_thread = NULL;
 }
 
 /**

[patch 21/27] zfcp: Simplify and update ct/gs and els timeout handling

[Christof Schmitt]

[-- Attachment #1: 725-zfcp-timeout-handling.diff --]
[-- Type: text/plain, Size: 4871 bytes --]

From: Christof Schmitt <christof.schmitt@de.ibm.com>

The recommendation for a timeout of 2 * R_A_TOV is the same for ct/gs
and els requests, so set it in the common function used for
initializing both request types. Besides, the timer inside zfcp should
only run longer than the timeout set for the channel, so 10 seconds
more should be enough (instead of 60 seconds).

Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---

 drivers/s390/scsi/zfcp_def.h |    5 -----
 drivers/s390/scsi/zfcp_fc.c  |    3 ---
 drivers/s390/scsi/zfcp_fsf.c |   15 ++++++---------
 3 files changed, 6 insertions(+), 17 deletions(-)

diff -urpN linux-2.6/drivers/s390/scsi/zfcp_def.h linux-2.6-patched/drivers/s390/scsi/zfcp_def.h
--- linux-2.6/drivers/s390/scsi/zfcp_def.h	2009-08-17 09:53:16.000000000 +0200
+++ linux-2.6-patched/drivers/s390/scsi/zfcp_def.h	2009-08-17 09:53:16.000000000 +0200
@@ -73,9 +73,6 @@
 
 /*************** FIBRE CHANNEL PROTOCOL SPECIFIC DEFINES ********************/
 
-/* timeout for name-server lookup (in seconds) */
-#define ZFCP_NS_GID_PN_TIMEOUT		10
-
 /* task attribute values in FCP-2 FCP_CMND IU */
 #define SIMPLE_Q	0
 #define HEAD_OF_Q	1
@@ -319,7 +316,6 @@ struct ct_iu_gpn_ft_req {
  * @resp: scatter-gather list for response
  * @handler: handler function (called for response to the request)
  * @handler_data: data passed to handler function
- * @timeout: FSF timeout for this request
  * @completion: completion for synchronization purposes
  * @status: used to pass error status to calling function
  */
@@ -329,7 +325,6 @@ struct zfcp_send_ct {
 	struct scatterlist *resp;
 	void (*handler)(unsigned long);
 	unsigned long handler_data;
-	int timeout;
 	struct completion *completion;
 	int status;
 };
diff -urpN linux-2.6/drivers/s390/scsi/zfcp_fc.c linux-2.6-patched/drivers/s390/scsi/zfcp_fc.c
--- linux-2.6/drivers/s390/scsi/zfcp_fc.c	2009-08-17 09:53:14.000000000 +0200
+++ linux-2.6-patched/drivers/s390/scsi/zfcp_fc.c	2009-08-17 09:53:16.000000000 +0200
@@ -283,7 +283,6 @@ static int zfcp_fc_ns_gid_pn_request(str
 	gid_pn->ct.wka_port = &adapter->gs->ds;
 	gid_pn->ct.handler = zfcp_fc_ns_handler;
 	gid_pn->ct.handler_data = (unsigned long) &compl_rec;
-	gid_pn->ct.timeout = ZFCP_NS_GID_PN_TIMEOUT;
 	gid_pn->ct.req = &gid_pn->req;
 	gid_pn->ct.resp = &gid_pn->resp;
 	sg_init_one(&gid_pn->req, &gid_pn->ct_iu_req,
@@ -556,7 +555,6 @@ static int zfcp_fc_send_gpn_ft(struct zf
 	ct->wka_port = &adapter->gs->ds;
 	ct->handler = zfcp_fc_ns_handler;
 	ct->handler_data = (unsigned long)&compl_rec;
-	ct->timeout = 10;
 	ct->req = &gpn_ft->sg_req;
 	ct->resp = gpn_ft->sg_resp;
 
@@ -845,7 +843,6 @@ int zfcp_fc_execute_ct_fc_job(struct fc_
 
 	ct_fc_job->ct.req = job->request_payload.sg_list;
 	ct_fc_job->ct.resp = job->reply_payload.sg_list;
-	ct_fc_job->ct.timeout = ZFCP_FSF_REQUEST_TIMEOUT;
 	ct_fc_job->ct.handler = zfcp_fc_generic_ct_handler;
 	ct_fc_job->ct.handler_data = (unsigned long) ct_fc_job;
 	ct_fc_job->ct.completion = NULL;
diff -urpN linux-2.6/drivers/s390/scsi/zfcp_fsf.c linux-2.6-patched/drivers/s390/scsi/zfcp_fsf.c
--- linux-2.6/drivers/s390/scsi/zfcp_fsf.c	2009-08-17 09:53:14.000000000 +0200
+++ linux-2.6-patched/drivers/s390/scsi/zfcp_fsf.c	2009-08-17 09:53:16.000000000 +0200
@@ -1060,7 +1060,12 @@ static int zfcp_fsf_setup_ct_els_sbals(s
 					sg_resp, max_sbals);
 	if (bytes <= 0)
 		return -EIO;
+
+	/* common settings for ct/gs and els requests */
 	req->qtcb->bottom.support.resp_buf_length = bytes;
+	req->qtcb->bottom.support.service_class = FSF_CLASS_3;
+	req->qtcb->bottom.support.timeout = 2 * R_A_TOV;
+	zfcp_fsf_start_timer(req, 2 * R_A_TOV + 10);
 
 	return 0;
 }
@@ -1096,12 +1101,9 @@ int zfcp_fsf_send_ct(struct zfcp_send_ct
 
 	req->handler = zfcp_fsf_send_ct_handler;
 	req->qtcb->header.port_handle = wka_port->handle;
-	req->qtcb->bottom.support.service_class = FSF_CLASS_3;
-	req->qtcb->bottom.support.timeout = ct->timeout;
 	req->data = ct;
 
 	zfcp_dbf_san_ct_request(req);
-	zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
 
 	ret = zfcp_fsf_req_send(req);
 	if (ret)
@@ -1176,7 +1178,6 @@ int zfcp_fsf_send_els(struct zfcp_send_e
 {
 	struct zfcp_fsf_req *req;
 	struct zfcp_qdio *qdio = els->adapter->qdio;
-	struct fsf_qtcb_bottom_support *bottom;
 	int ret = -EIO;
 
 	spin_lock_bh(&qdio->req_q_lock);
@@ -1196,16 +1197,12 @@ int zfcp_fsf_send_els(struct zfcp_send_e
 	if (ret)
 		goto failed_send;
 
-	bottom = &req->qtcb->bottom.support;
+	req->qtcb->bottom.support.d_id = els->d_id;
 	req->handler = zfcp_fsf_send_els_handler;
-	bottom->d_id = els->d_id;
-	bottom->service_class = FSF_CLASS_3;
-	bottom->timeout = 2 * R_A_TOV;
 	req->data = els;
 
 	zfcp_dbf_san_els_request(req);
 
-	zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
 	ret = zfcp_fsf_req_send(req);
 	if (ret)
 		goto failed_send;

[patch 22/27] zfcp: Defer resource allocation to first ccw_set_online call

[Christof Schmitt]

[-- Attachment #1: cc.diff --]
[-- Type: text/plain, Size: 7401 bytes --]

From: Christof Schmitt <christof.schmitt@de.ibm.com>

So far, zfcp allocated all resources required for FCP
adapters/subchannels when the device was discovered in the ccw_probe
callback. If there are lots of unused FCP subchannels attached to a
system, this is a waste of resources. To alleviate this, defer the
resource allocation to the first call to ccw_set_online. To avoid
disruptions during possible following calls to ccw_set_offline and
then ccw_set_online, keep the adapter resources until the device is
finally being removed via ccw_remove. While doing this, also manage
the zfcp erp thread together with all other adapter resources in
zfcp_adapter_enqueue/dequeue.

Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
--- a/drivers/s390/scsi/zfcp_aux.c	2009-08-18 14:21:55.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_aux.c	2009-08-18 14:21:55.000000000 +0200
@@ -541,6 +541,9 @@ int zfcp_adapter_enqueue(struct ccw_devi
 	rwlock_init(&adapter->erp_lock);
 	rwlock_init(&adapter->abort_lock);
 
+	if (zfcp_erp_thread_setup(adapter))
+		goto erp_thread_failed;
+
 	INIT_WORK(&adapter->stat_work, _zfcp_status_read_scheduler);
 	INIT_WORK(&adapter->scan_work, _zfcp_fc_scan_ports_later);
 
@@ -561,6 +564,8 @@ int zfcp_adapter_enqueue(struct ccw_devi
 		return 0;
 
 sysfs_failed:
+	zfcp_erp_thread_kill(adapter);
+erp_thread_failed:
 	zfcp_fc_gs_destroy(adapter);
 generic_services_failed:
 	zfcp_destroy_adapter_work_queue(adapter);
@@ -602,6 +607,7 @@ void zfcp_adapter_dequeue(struct zfcp_ad
 		return;
 
 	zfcp_fc_gs_destroy(adapter);
+	zfcp_erp_thread_kill(adapter);
 	zfcp_destroy_adapter_work_queue(adapter);
 	zfcp_dbf_adapter_unregister(adapter->dbf);
 	zfcp_free_low_mem_buffers(adapter);
--- a/drivers/s390/scsi/zfcp_ccw.c	2009-08-18 14:12:26.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_ccw.c	2009-08-18 14:21:55.000000000 +0200
@@ -18,6 +18,9 @@ static int zfcp_ccw_suspend(struct ccw_d
 {
 	struct zfcp_adapter *adapter = dev_get_drvdata(&cdev->dev);
 
+	if (!adapter)
+		return 0;
+
 	down(&zfcp_data.config_sema);
 
 	zfcp_erp_adapter_shutdown(adapter, 0, "ccsusp1", NULL);
@@ -33,6 +36,9 @@ static int zfcp_ccw_activate(struct ccw_
 {
 	struct zfcp_adapter *adapter = dev_get_drvdata(&cdev->dev);
 
+	if (!adapter)
+		return 0;
+
 	zfcp_erp_modify_adapter_status(adapter, "ccresu1", NULL,
 				       ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);
 	zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
@@ -63,25 +69,14 @@ int zfcp_ccw_priv_sch(struct zfcp_adapte
  * zfcp_ccw_probe - probe function of zfcp driver
  * @ccw_device: pointer to belonging ccw device
  *
- * This function gets called by the common i/o layer and sets up the initial
- * data structures for each fcp adapter, which was detected by the system.
- * Also the sysfs files for this adapter will be created by this function.
- * In addition the nameserver port will be added to the ports of the adapter
- * and its sysfs representation will be created too.
+ * This function gets called by the common i/o layer for each FCP
+ * device found on the current system. This is only a stub to make cio
+ * work: To only allocate adapter resources for devices actually used,
+ * the allocation is deferred to the first call to ccw_set_online.
  */
 static int zfcp_ccw_probe(struct ccw_device *ccw_device)
 {
-	int retval = 0;
-
-	down(&zfcp_data.config_sema);
-	if (zfcp_adapter_enqueue(ccw_device)) {
-		dev_err(&ccw_device->dev,
-			"Setting up data structures for the "
-			"FCP adapter failed\n");
-		retval = -EINVAL;
-	}
-	up(&zfcp_data.config_sema);
-	return retval;
+	return 0;
 }
 
 /**
@@ -102,8 +97,11 @@ static void zfcp_ccw_remove(struct ccw_d
 	LIST_HEAD(port_remove_lh);
 
 	ccw_device_set_offline(ccw_device);
+
 	down(&zfcp_data.config_sema);
 	adapter = dev_get_drvdata(&ccw_device->dev);
+	if (!adapter)
+		goto out;
 
 	write_lock_irq(&zfcp_data.config_lock);
 	list_for_each_entry_safe(port, p, &adapter->port_list_head, list) {
@@ -129,6 +127,7 @@ static void zfcp_ccw_remove(struct ccw_d
 	wait_event(adapter->remove_wq, atomic_read(&adapter->refcount) == 0);
 	zfcp_adapter_dequeue(adapter);
 
+out:
 	up(&zfcp_data.config_sema);
 }
 
@@ -136,22 +135,33 @@ static void zfcp_ccw_remove(struct ccw_d
  * zfcp_ccw_set_online - set_online function of zfcp driver
  * @ccw_device: pointer to belonging ccw device
  *
- * This function gets called by the common i/o layer and sets an adapter
- * into state online. Setting an fcp device online means that it will be
- * registered with the SCSI stack, that the QDIO queues will be set up
- * and that the adapter will be opened (asynchronously).
+ * This function gets called by the common i/o layer and sets an
+ * adapter into state online.  The first call will allocate all
+ * adapter resources that will be retained until the device is removed
+ * via zfcp_ccw_remove.
+ *
+ * Setting an fcp device online means that it will be registered with
+ * the SCSI stack, that the QDIO queues will be set up and that the
+ * adapter will be opened.
  */
 static int zfcp_ccw_set_online(struct ccw_device *ccw_device)
 {
 	struct zfcp_adapter *adapter;
-	int retval;
+	int ret = 0;
 
 	down(&zfcp_data.config_sema);
 	adapter = dev_get_drvdata(&ccw_device->dev);
 
-	retval = zfcp_erp_thread_setup(adapter);
-	if (retval)
-		goto out;
+	if (!adapter) {
+		ret = zfcp_adapter_enqueue(ccw_device);
+		if (ret) {
+			dev_err(&ccw_device->dev,
+				"Setting up data structures for the "
+				"FCP adapter failed\n");
+			goto out;
+		}
+		adapter = dev_get_drvdata(&ccw_device->dev);
+	}
 
 	/* initialize request counter */
 	BUG_ON(!zfcp_reqlist_isempty(adapter));
@@ -162,13 +172,11 @@ static int zfcp_ccw_set_online(struct cc
 	zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
 				"ccsonl2", NULL);
 	zfcp_erp_wait(adapter);
+out:
 	up(&zfcp_data.config_sema);
-	flush_work(&adapter->scan_work);
-	return 0;
-
- out:
-	up(&zfcp_data.config_sema);
-	return retval;
+	if (!ret)
+		flush_work(&adapter->scan_work);
+	return ret;
 }
 
 /**
@@ -184,10 +192,13 @@ static int zfcp_ccw_set_offline(struct c
 
 	down(&zfcp_data.config_sema);
 	adapter = dev_get_drvdata(&ccw_device->dev);
+	if (!adapter)
+		goto out;
+
 	zfcp_erp_adapter_shutdown(adapter, 0, "ccsoff1", NULL);
 	zfcp_erp_wait(adapter);
-	zfcp_erp_thread_kill(adapter);
 	up(&zfcp_data.config_sema);
+out:
 	return 0;
 }
 
@@ -244,6 +255,7 @@ static void zfcp_ccw_shutdown(struct ccw
 	adapter = dev_get_drvdata(&cdev->dev);
 	zfcp_erp_adapter_shutdown(adapter, 0, "ccshut1", NULL);
 	zfcp_erp_wait(adapter);
+	zfcp_erp_thread_kill(adapter);
 	up(&zfcp_data.config_sema);
 }
 
--- a/drivers/s390/scsi/zfcp_erp.c	2009-08-18 14:21:55.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_erp.c	2009-08-18 14:21:55.000000000 +0200
@@ -150,6 +150,9 @@ static int zfcp_erp_required_act(int wan
 		a_status = atomic_read(&adapter->status);
 		if (a_status & ZFCP_STATUS_COMMON_ERP_INUSE)
 			return 0;
+		if (!(a_status & ZFCP_STATUS_COMMON_RUNNING) &&
+		    !(a_status & ZFCP_STATUS_COMMON_OPEN))
+			return 0; /* shutdown requested for closed adapter */
 	}
 
 	return need;
@@ -1349,6 +1352,8 @@ void zfcp_erp_thread_kill(struct zfcp_ad
 {
 	kthread_stop(adapter->erp_thread);
 	adapter->erp_thread = NULL;
+	WARN_ON(!list_empty(&adapter->erp_ready_head));
+	WARN_ON(!list_empty(&adapter->erp_running_head));
 }
 
 /**

[patch 23/27] zfcp: Replace config semaphore with mutex

[Christof Schmitt]

[-- Attachment #1: 727-zfcp-config-mutex.diff --]
[-- Type: text/plain, Size: 10498 bytes --]

From: Christof Schmitt <christof.schmitt@de.ibm.com>

The config semaphore is only used as a mutex, so replace it with a
simple mutex.

Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---

 drivers/s390/scsi/zfcp_aux.c   |   22 +++++++++++-----------
 drivers/s390/scsi/zfcp_ccw.c   |   20 ++++++++++----------
 drivers/s390/scsi/zfcp_def.h   |    3 +--
 drivers/s390/scsi/zfcp_fc.c    |    4 ++--
 drivers/s390/scsi/zfcp_sysfs.c |   16 ++++++++--------
 5 files changed, 32 insertions(+), 33 deletions(-)

--- a/drivers/s390/scsi/zfcp_aux.c	2009-08-17 11:30:20.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_aux.c	2009-08-17 11:30:21.000000000 +0200
@@ -84,7 +84,7 @@ static void __init zfcp_init_device_conf
 	struct zfcp_port *port;
 	struct zfcp_unit *unit;
 
-	down(&zfcp_data.config_sema);
+	mutex_lock(&zfcp_data.config_mutex);
 	read_lock_irq(&zfcp_data.config_lock);
 	adapter = zfcp_get_adapter_by_busid(busid);
 	if (adapter)
@@ -99,20 +99,20 @@ static void __init zfcp_init_device_conf
 	unit = zfcp_unit_enqueue(port, lun);
 	if (IS_ERR(unit))
 		goto out_unit;
-	up(&zfcp_data.config_sema);
+	mutex_unlock(&zfcp_data.config_mutex);
 	ccw_device_set_online(adapter->ccw_device);
 
 	zfcp_erp_wait(adapter);
 	flush_work(&unit->scsi_work);
 
-	down(&zfcp_data.config_sema);
+	mutex_lock(&zfcp_data.config_mutex);
 	zfcp_unit_put(unit);
 out_unit:
 	zfcp_port_put(port);
 out_port:
 	zfcp_adapter_put(adapter);
 out_adapter:
-	up(&zfcp_data.config_sema);
+	mutex_unlock(&zfcp_data.config_mutex);
 	return;
 }
 
@@ -176,7 +176,7 @@ static int __init zfcp_module_init(void)
 	if (!zfcp_data.gid_pn_cache)
 		goto out_gid_cache;
 
-	sema_init(&zfcp_data.config_sema, 1);
+	mutex_init(&zfcp_data.config_mutex);
 	rwlock_init(&zfcp_data.config_lock);
 
 	zfcp_data.scsi_transport_template =
@@ -266,7 +266,7 @@ static void zfcp_sysfs_unit_release(stru
  * @port: pointer to port where unit is added
  * @fcp_lun: FCP LUN of unit to be enqueued
  * Returns: pointer to enqueued unit on success, ERR_PTR on error
- * Locks: config_sema must be held to serialize changes to the unit list
+ * Locks: config_mutex must be held to serialize changes to the unit list
  *
  * Sets up some unit internal structures and creates sysfs entry.
  */
@@ -356,7 +356,7 @@ void zfcp_unit_dequeue(struct zfcp_unit 
 
 static int zfcp_allocate_low_mem_buffers(struct zfcp_adapter *adapter)
 {
-	/* must only be called with zfcp_data.config_sema taken */
+	/* must only be called with zfcp_data.config_mutex taken */
 	adapter->pool.erp_req =
 		mempool_create_kmalloc_pool(1, sizeof(struct zfcp_fsf_req));
 	if (!adapter->pool.erp_req)
@@ -404,7 +404,7 @@ static int zfcp_allocate_low_mem_buffers
 
 static void zfcp_free_low_mem_buffers(struct zfcp_adapter *adapter)
 {
-	/* zfcp_data.config_sema must be held */
+	/* zfcp_data.config_mutex must be held */
 	if (adapter->pool.erp_req)
 		mempool_destroy(adapter->pool.erp_req);
 	if (adapter->pool.scsi_req)
@@ -491,7 +491,7 @@ static void zfcp_destroy_adapter_work_qu
  * Enqueues an adapter at the end of the adapter list in the driver data.
  * All adapter internal structures are set up.
  * Proc-fs entries are also created.
- * locks:	config_sema must be held to serialise changes to the adapter list
+ * locks: config_mutex must be held to serialize changes to the adapter list
  */
 int zfcp_adapter_enqueue(struct ccw_device *ccw_device)
 {
@@ -499,7 +499,7 @@ int zfcp_adapter_enqueue(struct ccw_devi
 
 	/*
 	 * Note: It is safe to release the list_lock, as any list changes
-	 * are protected by the config_sema, which must be held to get here
+	 * are protected by the config_mutex, which must be held to get here
 	 */
 
 	adapter = kzalloc(sizeof(struct zfcp_adapter), GFP_KERNEL);
@@ -630,7 +630,7 @@ static void zfcp_sysfs_port_release(stru
  * @status: initial status for the port
  * @d_id: destination id of the remote port to be enqueued
  * Returns: pointer to enqueued port on success, ERR_PTR on error
- * Locks: config_sema must be held to serialize changes to the port list
+ * Locks: config_mutex must be held to serialize changes to the port list
  *
  * All port internal structures are set up and the sysfs entry is generated.
  * d_id is used to enqueue ports with a well known address like the Directory
--- a/drivers/s390/scsi/zfcp_ccw.c	2009-08-17 11:30:20.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_ccw.c	2009-08-17 11:30:21.000000000 +0200
@@ -21,12 +21,12 @@ static int zfcp_ccw_suspend(struct ccw_d
 	if (!adapter)
 		return 0;
 
-	down(&zfcp_data.config_sema);
+	mutex_lock(&zfcp_data.config_mutex);
 
 	zfcp_erp_adapter_shutdown(adapter, 0, "ccsusp1", NULL);
 	zfcp_erp_wait(adapter);
 
-	up(&zfcp_data.config_sema);
+	mutex_unlock(&zfcp_data.config_mutex);
 
 	return 0;
 }
@@ -98,7 +98,7 @@ static void zfcp_ccw_remove(struct ccw_d
 
 	ccw_device_set_offline(ccw_device);
 
-	down(&zfcp_data.config_sema);
+	mutex_lock(&zfcp_data.config_mutex);
 	adapter = dev_get_drvdata(&ccw_device->dev);
 	if (!adapter)
 		goto out;
@@ -128,7 +128,7 @@ static void zfcp_ccw_remove(struct ccw_d
 	zfcp_adapter_dequeue(adapter);
 
 out:
-	up(&zfcp_data.config_sema);
+	mutex_unlock(&zfcp_data.config_mutex);
 }
 
 /**
@@ -149,7 +149,7 @@ static int zfcp_ccw_set_online(struct cc
 	struct zfcp_adapter *adapter;
 	int ret = 0;
 
-	down(&zfcp_data.config_sema);
+	mutex_lock(&zfcp_data.config_mutex);
 	adapter = dev_get_drvdata(&ccw_device->dev);
 
 	if (!adapter) {
@@ -173,7 +173,7 @@ static int zfcp_ccw_set_online(struct cc
 				"ccsonl2", NULL);
 	zfcp_erp_wait(adapter);
 out:
-	up(&zfcp_data.config_sema);
+	mutex_unlock(&zfcp_data.config_mutex);
 	if (!ret)
 		flush_work(&adapter->scan_work);
 	return ret;
@@ -190,14 +190,14 @@ static int zfcp_ccw_set_offline(struct c
 {
 	struct zfcp_adapter *adapter;
 
-	down(&zfcp_data.config_sema);
+	mutex_lock(&zfcp_data.config_mutex);
 	adapter = dev_get_drvdata(&ccw_device->dev);
 	if (!adapter)
 		goto out;
 
 	zfcp_erp_adapter_shutdown(adapter, 0, "ccsoff1", NULL);
 	zfcp_erp_wait(adapter);
-	up(&zfcp_data.config_sema);
+	mutex_unlock(&zfcp_data.config_mutex);
 out:
 	return 0;
 }
@@ -251,12 +251,12 @@ static void zfcp_ccw_shutdown(struct ccw
 {
 	struct zfcp_adapter *adapter;
 
-	down(&zfcp_data.config_sema);
+	mutex_lock(&zfcp_data.config_mutex);
 	adapter = dev_get_drvdata(&cdev->dev);
 	zfcp_erp_adapter_shutdown(adapter, 0, "ccshut1", NULL);
 	zfcp_erp_wait(adapter);
 	zfcp_erp_thread_kill(adapter);
-	up(&zfcp_data.config_sema);
+	mutex_unlock(&zfcp_data.config_mutex);
 }
 
 static struct ccw_driver zfcp_ccw_driver = {
--- a/drivers/s390/scsi/zfcp_def.h	2009-08-17 11:30:18.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_def.h	2009-08-17 11:30:21.000000000 +0200
@@ -604,8 +604,7 @@ struct zfcp_data {
 	rwlock_t                config_lock;        /* serialises changes
 						       to adapter/port/unit
 						       lists */
-	struct semaphore        config_sema;        /* serialises configuration
-						       changes */
+	struct mutex		config_mutex;
 	struct kmem_cache	*gpn_ft_cache;
 	struct kmem_cache	*qtcb_cache;
 	struct kmem_cache	*sr_buffer_cache;
--- a/drivers/s390/scsi/zfcp_fc.c	2009-08-17 11:30:18.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fc.c	2009-08-17 11:30:21.000000000 +0200
@@ -613,7 +613,7 @@ static int zfcp_fc_eval_gpn_ft(struct zf
 		return -E2BIG;
 	}
 
-	down(&zfcp_data.config_sema);
+	mutex_lock(&zfcp_data.config_mutex);
 
 	/* first entry is the header */
 	for (x = 1; x < max_entries && !last; x++) {
@@ -647,7 +647,7 @@ static int zfcp_fc_eval_gpn_ft(struct zf
 	zfcp_erp_wait(adapter);
 	list_for_each_entry_safe(port, tmp, &adapter->port_list_head, list)
 		zfcp_fc_validate_port(port);
-	up(&zfcp_data.config_sema);
+	mutex_unlock(&zfcp_data.config_mutex);
 	return ret;
 }
 
--- a/drivers/s390/scsi/zfcp_sysfs.c	2009-08-17 11:29:48.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_sysfs.c	2009-08-17 11:30:21.000000000 +0200
@@ -88,7 +88,7 @@ static ssize_t zfcp_sysfs_##_feat##_fail
 	unsigned long val;						       \
 	int retval = 0;							       \
 									       \
-	down(&zfcp_data.config_sema);					       \
+	mutex_lock(&zfcp_data.config_mutex);				       \
 	if (atomic_read(&_feat->status) & ZFCP_STATUS_COMMON_REMOVE) {	       \
 		retval = -EBUSY;					       \
 		goto out;						       \
@@ -105,7 +105,7 @@ static ssize_t zfcp_sysfs_##_feat##_fail
 				  _reopen_id, NULL);			       \
 	zfcp_erp_wait(_adapter);					       \
 out:									       \
-	up(&zfcp_data.config_sema);					       \
+	mutex_unlock(&zfcp_data.config_mutex);				       \
 	return retval ? retval : (ssize_t) count;			       \
 }									       \
 static ZFCP_DEV_ATTR(_feat, failed, S_IWUSR | S_IRUGO,			       \
@@ -142,7 +142,7 @@ static ssize_t zfcp_sysfs_port_remove_st
 	int retval = 0;
 	LIST_HEAD(port_remove_lh);
 
-	down(&zfcp_data.config_sema);
+	mutex_lock(&zfcp_data.config_mutex);
 	if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_REMOVE) {
 		retval = -EBUSY;
 		goto out;
@@ -173,7 +173,7 @@ static ssize_t zfcp_sysfs_port_remove_st
 	zfcp_port_put(port);
 	zfcp_port_dequeue(port);
  out:
-	up(&zfcp_data.config_sema);
+	mutex_unlock(&zfcp_data.config_mutex);
 	return retval ? retval : (ssize_t) count;
 }
 static ZFCP_DEV_ATTR(adapter, port_remove, S_IWUSR, NULL,
@@ -207,7 +207,7 @@ static ssize_t zfcp_sysfs_unit_add_store
 	u64 fcp_lun;
 	int retval = -EINVAL;
 
-	down(&zfcp_data.config_sema);
+	mutex_lock(&zfcp_data.config_mutex);
 	if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE) {
 		retval = -EBUSY;
 		goto out;
@@ -226,7 +226,7 @@ static ssize_t zfcp_sysfs_unit_add_store
 	zfcp_erp_wait(unit->port->adapter);
 	zfcp_unit_put(unit);
 out:
-	up(&zfcp_data.config_sema);
+	mutex_unlock(&zfcp_data.config_mutex);
 	return retval ? retval : (ssize_t) count;
 }
 static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
@@ -241,7 +241,7 @@ static ssize_t zfcp_sysfs_unit_remove_st
 	int retval = 0;
 	LIST_HEAD(unit_remove_lh);
 
-	down(&zfcp_data.config_sema);
+	mutex_lock(&zfcp_data.config_mutex);
 	if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE) {
 		retval = -EBUSY;
 		goto out;
@@ -282,7 +282,7 @@ static ssize_t zfcp_sysfs_unit_remove_st
 	zfcp_unit_put(unit);
 	zfcp_unit_dequeue(unit);
 out:
-	up(&zfcp_data.config_sema);
+	mutex_unlock(&zfcp_data.config_mutex);
 	return retval ? retval : (ssize_t) count;
 }
 static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);

[patch 24/27] zfcp: proper use of device register

[Christof Schmitt]

[-- Attachment #1: 721-zfcp-device-register.diff --]
[-- Type: text/plain, Size: 1231 bytes --]

From: Sebastian Ott <sebott@linux.vnet.ibm.com>

Don't use kfree directly after device registration started.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---

 drivers/s390/scsi/zfcp_aux.c |   12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

--- a/drivers/s390/scsi/zfcp_aux.c	2009-08-17 11:30:21.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_aux.c	2009-08-17 11:30:23.000000000 +0200
@@ -309,8 +309,10 @@ struct zfcp_unit *zfcp_unit_enqueue(stru
 	}
 	read_unlock_irq(&zfcp_data.config_lock);
 
-	if (device_register(&unit->sysfs_device))
-		goto err_out_free;
+	if (device_register(&unit->sysfs_device)) {
+		put_device(&unit->sysfs_device);
+		return ERR_PTR(-EINVAL);
+	}
 
 	if (sysfs_create_group(&unit->sysfs_device.kobj,
 			       &zfcp_sysfs_unit_attrs)) {
@@ -675,8 +677,10 @@ struct zfcp_port *zfcp_port_enqueue(stru
 	}
 	read_unlock_irq(&zfcp_data.config_lock);
 
-	if (device_register(&port->sysfs_device))
-		goto err_out_free;
+	if (device_register(&port->sysfs_device)) {
+		put_device(&port->sysfs_device);
+		goto err_out;
+	}
 
 	retval = sysfs_create_group(&port->sysfs_device.kobj,
 				    &zfcp_sysfs_port_attrs);

[patch 25/27] zfcp: Handle failures during device allocation correctly

[Christof Schmitt]

[-- Attachment #1: 721-zfcp-device-allocation.diff --]
[-- Type: text/plain, Size: 4258 bytes --]

From: Christof Schmitt <christof.schmitt@de.ibm.com>

dev_set_name tries to allocate memory, so check the return value for
allocation failures. After dev_set_name succeeds, call device_register
as next step to be able to use put_device during error handling.

Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---

 drivers/s390/scsi/zfcp_aux.c |   65 +++++++++++++++++++------------------------
 1 file changed, 29 insertions(+), 36 deletions(-)

--- a/drivers/s390/scsi/zfcp_aux.c	2009-08-17 11:30:23.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_aux.c	2009-08-17 11:30:26.000000000 +0200
@@ -274,6 +274,13 @@ struct zfcp_unit *zfcp_unit_enqueue(stru
 {
 	struct zfcp_unit *unit;
 
+	read_lock_irq(&zfcp_data.config_lock);
+	if (zfcp_get_unit_by_lun(port, fcp_lun)) {
+		read_unlock_irq(&zfcp_data.config_lock);
+		return ERR_PTR(-EINVAL);
+	}
+	read_unlock_irq(&zfcp_data.config_lock);
+
 	unit = kzalloc(sizeof(struct zfcp_unit), GFP_KERNEL);
 	if (!unit)
 		return ERR_PTR(-ENOMEM);
@@ -285,8 +292,11 @@ struct zfcp_unit *zfcp_unit_enqueue(stru
 	unit->port = port;
 	unit->fcp_lun = fcp_lun;
 
-	dev_set_name(&unit->sysfs_device, "0x%016llx",
-		     (unsigned long long) fcp_lun);
+	if (dev_set_name(&unit->sysfs_device, "0x%016llx",
+			 (unsigned long long) fcp_lun)) {
+		kfree(unit);
+		return ERR_PTR(-ENOMEM);
+	}
 	unit->sysfs_device.parent = &port->sysfs_device;
 	unit->sysfs_device.release = zfcp_sysfs_unit_release;
 	dev_set_drvdata(&unit->sysfs_device, unit);
@@ -302,13 +312,6 @@ struct zfcp_unit *zfcp_unit_enqueue(stru
 	unit->latencies.cmd.channel.min = 0xFFFFFFFF;
 	unit->latencies.cmd.fabric.min = 0xFFFFFFFF;
 
-	read_lock_irq(&zfcp_data.config_lock);
-	if (zfcp_get_unit_by_lun(port, fcp_lun)) {
-		read_unlock_irq(&zfcp_data.config_lock);
-		goto err_out_free;
-	}
-	read_unlock_irq(&zfcp_data.config_lock);
-
 	if (device_register(&unit->sysfs_device)) {
 		put_device(&unit->sysfs_device);
 		return ERR_PTR(-EINVAL);
@@ -317,7 +320,7 @@ struct zfcp_unit *zfcp_unit_enqueue(stru
 	if (sysfs_create_group(&unit->sysfs_device.kobj,
 			       &zfcp_sysfs_unit_attrs)) {
 		device_unregister(&unit->sysfs_device);
-		return ERR_PTR(-EIO);
+		return ERR_PTR(-EINVAL);
 	}
 
 	zfcp_unit_get(unit);
@@ -332,10 +335,6 @@ struct zfcp_unit *zfcp_unit_enqueue(stru
 	zfcp_port_get(port);
 
 	return unit;
-
-err_out_free:
-	kfree(unit);
-	return ERR_PTR(-EINVAL);
 }
 
 /**
@@ -642,7 +641,13 @@ struct zfcp_port *zfcp_port_enqueue(stru
 				     u32 status, u32 d_id)
 {
 	struct zfcp_port *port;
-	int retval;
+
+	read_lock_irq(&zfcp_data.config_lock);
+	if (zfcp_get_port_by_wwpn(adapter, wwpn)) {
+		read_unlock_irq(&zfcp_data.config_lock);
+		return ERR_PTR(-EINVAL);
+	}
+	read_unlock_irq(&zfcp_data.config_lock);
 
 	port = kzalloc(sizeof(struct zfcp_port), GFP_KERNEL);
 	if (!port)
@@ -663,31 +668,24 @@ struct zfcp_port *zfcp_port_enqueue(stru
 	atomic_set_mask(status | ZFCP_STATUS_COMMON_REMOVE, &port->status);
 	atomic_set(&port->refcount, 0);
 
-	dev_set_name(&port->sysfs_device, "0x%016llx",
-		     (unsigned long long)wwpn);
+	if (dev_set_name(&port->sysfs_device, "0x%016llx",
+			 (unsigned long long)wwpn)) {
+		kfree(port);
+		return ERR_PTR(-ENOMEM);
+	}
 	port->sysfs_device.parent = &adapter->ccw_device->dev;
-
 	port->sysfs_device.release = zfcp_sysfs_port_release;
 	dev_set_drvdata(&port->sysfs_device, port);
 
-	read_lock_irq(&zfcp_data.config_lock);
-	if (zfcp_get_port_by_wwpn(adapter, wwpn)) {
-		read_unlock_irq(&zfcp_data.config_lock);
-		goto err_out_free;
-	}
-	read_unlock_irq(&zfcp_data.config_lock);
-
 	if (device_register(&port->sysfs_device)) {
 		put_device(&port->sysfs_device);
-		goto err_out;
+		return ERR_PTR(-EINVAL);
 	}
 
-	retval = sysfs_create_group(&port->sysfs_device.kobj,
-				    &zfcp_sysfs_port_attrs);
-
-	if (retval) {
+	if (sysfs_create_group(&port->sysfs_device.kobj,
+			       &zfcp_sysfs_port_attrs)) {
 		device_unregister(&port->sysfs_device);
-		goto err_out;
+		return ERR_PTR(-EINVAL);
 	}
 
 	zfcp_port_get(port);
@@ -701,11 +699,6 @@ struct zfcp_port *zfcp_port_enqueue(stru
 
 	zfcp_adapter_get(adapter);
 	return port;
-
-err_out_free:
-	kfree(port);
-err_out:
-	return ERR_PTR(-EINVAL);
 }
 
 /**

[patch 26/27] zfcp: Remove duplicated code for debug timestamps

[Christof Schmitt]

[-- Attachment #1: 705-zfcp-debug-timestamps.diff --]
[-- Type: text/plain, Size: 4311 bytes --]

From: Christof Schmitt <christof.schmitt@de.ibm.com>

The timestamp calculation used for s390dbf output is the same in a
private zfcp function and in debug.c. Replace both with a common
inline function.

Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---

 arch/s390/include/asm/timex.h |    8 ++++++++
 arch/s390/kernel/debug.c      |    8 +-------
 arch/s390/kernel/time.c       |    1 +
 drivers/s390/scsi/zfcp_dbf.c  |   19 +++----------------
 4 files changed, 13 insertions(+), 23 deletions(-)

--- a/arch/s390/include/asm/timex.h	2009-08-17 11:08:55.000000000 +0200
+++ b/arch/s390/include/asm/timex.h	2009-08-17 11:12:35.000000000 +0200
@@ -88,6 +88,14 @@ int get_sync_clock(unsigned long long *c
 void init_cpu_timer(void);
 unsigned long long monotonic_clock(void);
 
+void tod_to_timeval(__u64, struct timespec *);
+
+static inline
+void stck_to_timespec(unsigned long long stck, struct timespec *ts)
+{
+	tod_to_timeval(stck - TOD_UNIX_EPOCH, ts);
+}
+
 extern u64 sched_clock_base_cc;
 
 #endif
--- a/arch/s390/kernel/debug.c	2009-08-17 11:08:54.000000000 +0200
+++ b/arch/s390/kernel/debug.c	2009-08-17 11:11:22.000000000 +0200
@@ -63,8 +63,6 @@ typedef struct
 } debug_sprintf_entry_t;
 
 
-extern void tod_to_timeval(uint64_t todval, struct timespec *xtime);
-
 /* internal function prototyes */
 
 static int debug_init(void);
@@ -1450,17 +1448,13 @@ debug_dflt_header_fn(debug_info_t * id, 
 			 int area, debug_entry_t * entry, char *out_buf)
 {
 	struct timespec time_spec;
-	unsigned long long time;
 	char *except_str;
 	unsigned long caller;
 	int rc = 0;
 	unsigned int level;
 
 	level = entry->id.fields.level;
-	time = entry->id.stck;
-	/* adjust todclock to 1970 */
-	time -= 0x8126d60e46000000LL - (0x3c26700LL * 1000000 * 4096);
-	tod_to_timeval(time, &time_spec);
+	stck_to_timespec(entry->id.stck, &time_spec);
 
 	if (entry->id.fields.exception)
 		except_str = "*";
--- a/arch/s390/kernel/time.c	2009-08-17 11:08:55.000000000 +0200
+++ b/arch/s390/kernel/time.c	2009-08-17 11:11:22.000000000 +0200
@@ -90,6 +90,7 @@ void tod_to_timeval(__u64 todval, struct
 	todval -= (sec * 1000000) << 12;
 	xtime->tv_nsec = ((todval * 1000) >> 12);
 }
+EXPORT_SYMBOL(tod_to_timeval);
 
 void clock_comparator_work(void)
 {
--- a/drivers/s390/scsi/zfcp_dbf.c	2009-08-17 11:09:56.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_dbf.c	2009-08-17 11:11:22.000000000 +0200
@@ -38,19 +38,6 @@ static void zfcp_dbf_hexdump(debug_info_
 	}
 }
 
-/* FIXME: this duplicate this code in s390 debug feature */
-static void zfcp_dbf_timestamp(unsigned long long stck, struct timespec *time)
-{
-	unsigned long long sec;
-
-	stck -= 0x8126d60e46000000LL - (0x3c26700LL * 1000000 * 4096);
-	sec = stck >> 12;
-	do_div(sec, 1000000);
-	time->tv_sec = sec;
-	stck -= (sec * 1000000) << 12;
-	time->tv_nsec = ((stck * 1000) >> 12);
-}
-
 static void zfcp_dbf_tag(char **p, const char *label, const char *tag)
 {
 	int i;
@@ -107,7 +94,7 @@ static int zfcp_dbf_view_header(debug_in
 	char *p = out_buf;
 
 	if (strncmp(dump->tag, "dump", ZFCP_DBF_TAG_SIZE) != 0) {
-		zfcp_dbf_timestamp(entry->id.stck, &t);
+		stck_to_timespec(entry->id.stck, &t);
 		zfcp_dbf_out(&p, "timestamp", "%011lu:%06lu",
 			     t.tv_sec, t.tv_nsec);
 		zfcp_dbf_out(&p, "cpu", "%02i", entry->id.fields.cpuid);
@@ -320,7 +307,7 @@ static void zfcp_dbf_hba_view_response(c
 	zfcp_dbf_out(p, "fsf_command", "0x%08x", r->fsf_command);
 	zfcp_dbf_out(p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
 	zfcp_dbf_out(p, "fsf_seqno", "0x%08x", r->fsf_seqno);
-	zfcp_dbf_timestamp(r->fsf_issued, &t);
+	stck_to_timespec(r->fsf_issued, &t);
 	zfcp_dbf_out(p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
 	zfcp_dbf_out(p, "fsf_prot_status", "0x%08x", r->fsf_prot_status);
 	zfcp_dbf_out(p, "fsf_status", "0x%08x", r->fsf_status);
@@ -976,7 +963,7 @@ static int zfcp_dbf_scsi_view_format(deb
 		zfcp_dbf_out(&p, "old_fsf_reqid", "0x%0Lx", r->old_fsf_reqid);
 	zfcp_dbf_out(&p, "fsf_reqid", "0x%0Lx", r->fsf_reqid);
 	zfcp_dbf_out(&p, "fsf_seqno", "0x%08x", r->fsf_seqno);
-	zfcp_dbf_timestamp(r->fsf_issued, &t);
+	stck_to_timespec(r->fsf_issued, &t);
 	zfcp_dbf_out(&p, "fsf_issued", "%011lu:%06lu", t.tv_sec, t.tv_nsec);
 
 	if (strncmp(r->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) {

[patch 27/27] zfcp: optimize zfcp_qdio_account

[Christof Schmitt]

[-- Attachment #1: 704-zfcp-optimize-qdio_account.diff --]
[-- Type: text/plain, Size: 1752 bytes --]

From: Heiko Carstens <heiko.carstens@de.ibm.com>

Remove expensive ktime_get()/ktime_us_delta() functions from the hot
path and use get_clock_monotonic() instead. This elimates seven
function calls and avoids a lot of unnecessary calculations.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---

 drivers/s390/scsi/zfcp_def.h  |    2 +-
 drivers/s390/scsi/zfcp_qdio.c |   11 +++++------
 2 files changed, 6 insertions(+), 7 deletions(-)

--- a/drivers/s390/scsi/zfcp_def.h	2009-08-17 10:30:25.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_def.h	2009-08-17 10:30:25.000000000 +0200
@@ -438,7 +438,7 @@ struct zfcp_qdio {
 	struct zfcp_qdio_queue	req_q;
 	spinlock_t		stat_lock;
 	spinlock_t		req_q_lock;
-	ktime_t			req_q_time;
+	unsigned long long	req_q_time;
 	u64			req_q_util;
 	atomic_t		req_q_full;
 	wait_queue_head_t	req_q_wq;
--- a/drivers/s390/scsi/zfcp_qdio.c	2009-08-17 10:29:21.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_qdio.c	2009-08-17 10:31:47.000000000 +0200
@@ -56,16 +56,15 @@ static void zfcp_qdio_zero_sbals(struct 
 }
 
 /* this needs to be called prior to updating the queue fill level */
-static void zfcp_qdio_account(struct zfcp_qdio *qdio)
+static inline void zfcp_qdio_account(struct zfcp_qdio *qdio)
 {
-	ktime_t now;
-	s64 span;
+	unsigned long long now, span;
 	int free, used;
 
 	spin_lock(&qdio->stat_lock);
-	now = ktime_get();
-	span = ktime_us_delta(now, qdio->req_q_time);
-	free = max(0, atomic_read(&qdio->req_q.count));
+	now = get_clock_monotonic();
+	span = (now - qdio->req_q_time) >> 12;
+	free = atomic_read(&qdio->req_q.count);
 	used = QDIO_MAX_BUFFERS_PER_Q - free;
 	qdio->req_q_util += used * span;
 	qdio->req_q_time = now;