[Qemu-devel] [PULL 13/35] megasas: Update queue logging

[Paolo Bonzini <pbonzini@redhat.com>]

From: Hannes Reinecke <hare@suse.de>

Improve queue logging by displaying head and tail pointer
of the completion queue.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/scsi/megasas.c | 26 +++++++++++++++++---------
 trace-events      |  7 ++++---
 2 files changed, 21 insertions(+), 12 deletions(-)

diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c
index dcfef63..3107445 100644
--- a/hw/scsi/megasas.c
+++ b/hw/scsi/megasas.c
@@ -527,8 +527,12 @@ static MegasasCmd *megasas_enqueue_frame(MegasasState *s,
     cmd->count = count;
     s->busy++;
 
+    if (s->consumer_pa) {
+        s->reply_queue_tail = ldl_le_phys(&address_space_memory,
+                                          s->consumer_pa);
+    }
     trace_megasas_qf_enqueue(cmd->index, cmd->count, cmd->context,
-                             s->reply_queue_head, s->busy);
+                             s->reply_queue_head, s->reply_queue_tail, s->busy);
 
     return cmd;
 }
@@ -558,8 +562,10 @@ static void megasas_complete_frame(MegasasState *s, uint64_t context)
                         s->reply_queue_pa + queue_offset, context);
         }
         s->reply_queue_head = megasas_next_index(s, tail, s->fw_cmds);
-        trace_megasas_qf_complete(context, tail, queue_offset,
-                                  s->busy, s->doorbell);
+        s->reply_queue_tail = ldl_le_phys(&address_space_memory,
+                                          s->consumer_pa);
+        trace_megasas_qf_complete(context, s->reply_queue_head,
+                                  s->reply_queue_tail, s->busy, s->doorbell);
     }
 
     if (megasas_intr_enabled(s)) {
@@ -1649,7 +1655,6 @@ static int megasas_handle_scsi(MegasasState *s, MegasasCmd *cmd,
                                bool is_logical)
 {
     uint8_t *cdb;
-    int len;
     bool is_write;
     struct SCSIDevice *sdev = NULL;
 
@@ -1710,16 +1715,16 @@ static int megasas_handle_scsi(MegasasState *s, MegasasCmd *cmd,
     }
 
     is_write = (cmd->req->cmd.mode == SCSI_XFER_TO_DEV);
-    len = megasas_enqueue_req(cmd, is_write);
-    if (len > 0) {
+    if (cmd->iov_size) {
         if (is_write) {
-            trace_megasas_scsi_write_start(cmd->index, len);
+            trace_megasas_scsi_write_start(cmd->index, cmd->iov_size);
         } else {
-            trace_megasas_scsi_read_start(cmd->index, len);
+            trace_megasas_scsi_read_start(cmd->index, cmd->iov_size);
         }
     } else {
         trace_megasas_scsi_nodata(cmd->index);
     }
+    megasas_enqueue_req(cmd, is_write);
     return MFI_STAT_INVALID_STATUS;
 }
 
@@ -2106,7 +2111,10 @@ static void megasas_mmio_write(void *opaque, hwaddr addr,
         s->doorbell = 0;
         if (s->producer_pa && megasas_intr_enabled(s)) {
             /* Update reply queue pointer */
-            trace_megasas_qf_update(s->reply_queue_head, s->busy);
+            s->reply_queue_tail = ldl_le_phys(&address_space_memory,
+                                              s->consumer_pa);
+            trace_megasas_qf_update(s->reply_queue_head, s->reply_queue_tail,
+                                    s->busy);
             stl_le_phys(&address_space_memory,
                         s->producer_pa, s->reply_queue_head);
             if (!msix_enabled(pci_dev)) {
diff --git a/trace-events b/trace-events
index a8b25a1..3399219 100644
--- a/trace-events
+++ b/trace-events
@@ -702,11 +702,11 @@ megasas_initq_mismatch(int queue_len, int fw_cmds) "queue size %d max fw cmds %d
 megasas_qf_found(unsigned int index, uint64_t pa) "mapped frame %x pa %" PRIx64 ""
 megasas_qf_new(unsigned int index, void *cmd) "return new frame %x cmd %p"
 megasas_qf_failed(unsigned long pa) "all frames busy for frame %lx"
-megasas_qf_enqueue(unsigned int index, unsigned int count, uint64_t context, unsigned int tail, int busy) "enqueue frame %x count %d context %" PRIx64 " tail %x busy %d"
-megasas_qf_update(unsigned int head, unsigned int busy) "reply queue head %x busy %d"
+megasas_qf_enqueue(unsigned int index, unsigned int count, uint64_t context, unsigned int head, unsigned int tail, int busy) "frame %x count %d context %" PRIx64 " head %x tail %x busy %d"
+megasas_qf_update(unsigned int head, unsigned int tail, unsigned int busy) "head %x tail %x busy %d"
 megasas_qf_map_failed(int cmd, unsigned long frame) "scmd %d: frame %lu"
 megasas_qf_complete_noirq(uint64_t context) "context %" PRIx64 " "
-megasas_qf_complete(uint64_t context, unsigned int tail, unsigned int offset, int busy, unsigned int doorbell) "context %" PRIx64 " tail %x offset %d busy %d doorbell %x"
+megasas_qf_complete(uint64_t context, unsigned int head, unsigned int tail, int busy, unsigned int doorbell) "context %" PRIx64 " head %x tail %x busy %d doorbell %x"
 megasas_frame_busy(uint64_t addr) "frame %" PRIx64 " busy"
 megasas_unhandled_frame_cmd(int cmd, uint8_t frame_cmd) "scmd %d: MFI cmd %x"
 megasas_handle_scsi(const char *frame, int bus, int dev, int lun, void *sdev, unsigned long size) "%s dev %x/%x/%x sdev %p xfer %lu"
@@ -751,6 +751,7 @@ megasas_dcmd_ld_get_info(int cmd, int ld_id) "scmd %d: dev %d"
 megasas_dcmd_ld_list_query(int cmd, int flags) "scmd %d: query flags %x"
 megasas_dcmd_pd_get_info(int cmd, int pd_id) "scmd %d: dev %d"
 megasas_dcmd_pd_list_query(int cmd, int flags) "scmd %d: query flags %x"
+megasas_dcmd_reset_ld(int cmd, int target_id) "scmd %d: dev %d"
 megasas_dcmd_unsupported(int cmd, unsigned long size) "scmd %d: set properties len %ld"
 megasas_abort_frame(int cmd, int abort_cmd) "scmd %d: frame %x"
 megasas_abort_no_cmd(int cmd, uint64_t context) "scmd %d: no active command for frame context %" PRIx64 ""
-- 
1.8.3.1