From: Dan Williams <dan.j.williams@intel.com>
To: linux-scsi@vger.kernel.org
Cc: Jeff Skirvin <jeffrey.d.skirvin@intel.com>
Subject: [isci-rnc PATCH v1 33/37] isci: Remove obviated host callback list.
Date: Thu, 22 Mar 2012 17:30:54 -0700 [thread overview]
Message-ID: <20120323003054.18065.2073.stgit@dwillia2-linux.jf.intel.com> (raw)
In-Reply-To: <20120323002504.18065.45709.stgit@dwillia2-linux.jf.intel.com>
From: Jeff Skirvin <jeffrey.d.skirvin@intel.com>
Since the callbacks to libsas now occur under scic_lock, there is no
longer any reason to save the completed requests in a separate list
for completion to libsas.
Signed-off-by: Jeff Skirvin <jeffrey.d.skirvin@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
drivers/scsi/isci/host.c | 78 ++++++++++++++-----------------------------
drivers/scsi/isci/host.h | 2 +
drivers/scsi/isci/init.c | 1 -
drivers/scsi/isci/request.c | 14 ++------
drivers/scsi/isci/request.h | 2 -
5 files changed, 31 insertions(+), 66 deletions(-)
diff --git a/drivers/scsi/isci/host.c b/drivers/scsi/isci/host.c
index 7061c98..f26ff0f 100644
--- a/drivers/scsi/isci/host.c
+++ b/drivers/scsi/isci/host.c
@@ -1066,6 +1066,32 @@ static void sci_controller_completion_handler(struct isci_host *ihost)
writel(0, &ihost->smu_registers->interrupt_mask);
}
+void ireq_done(struct isci_host *ihost, struct isci_request *ireq, struct sas_task *task)
+{
+ task->lldd_task = NULL;
+ if (!test_bit(IREQ_ABORT_PATH_ACTIVE, &ireq->flags) &&
+ !(task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
+ if (test_bit(IREQ_COMPLETE_IN_TARGET, &ireq->flags)) {
+ /* Normal notification (task_done) */
+ dev_dbg(&ihost->pdev->dev,
+ "%s: Normal - ireq/task = %p/%p\n",
+ __func__, ireq, task);
+
+ task->task_done(task);
+ } else {
+ dev_dbg(&ihost->pdev->dev,
+ "%s: Error - ireq/task = %p/%p\n",
+ __func__, ireq, task);
+
+ sas_task_abort(task);
+ }
+ }
+ if (test_and_clear_bit(IREQ_ABORT_PATH_ACTIVE, &ireq->flags))
+ wake_up_all(&ihost->eventq);
+
+ if (!test_bit(IREQ_NO_AUTO_FREE_TAG, &ireq->flags))
+ isci_free_tag(ihost, ireq->io_tag);
+}
/**
* isci_host_completion_routine() - This function is the delayed service
* routine that calls the sci core library's completion handler. It's
@@ -1077,62 +1103,10 @@ static void sci_controller_completion_handler(struct isci_host *ihost)
void isci_host_completion_routine(unsigned long data)
{
struct isci_host *ihost = (struct isci_host *)data;
- struct list_head completed_request_list;
- struct list_head *current_position;
- struct list_head *next_position;
- struct isci_request *request;
- struct sas_task *task;
u16 active;
- INIT_LIST_HEAD(&completed_request_list);
-
spin_lock_irq(&ihost->scic_lock);
-
sci_controller_completion_handler(ihost);
-
- /* Take the lists of completed I/Os from the host. */
- list_splice_init(&ihost->requests_to_complete,
- &completed_request_list);
-
- /* Process any completions in the list. */
- list_for_each_safe(current_position, next_position,
- &completed_request_list) {
-
- request = list_entry(current_position, struct isci_request,
- completed_node);
- task = isci_request_access_task(request);
-
- /* Return the task to libsas */
- if (task != NULL) {
-
- task->lldd_task = NULL;
- if (!test_bit(IREQ_ABORT_PATH_ACTIVE, &request->flags) &&
- !(task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
- if (test_bit(IREQ_COMPLETE_IN_TARGET,
- &request->flags)) {
-
- /* Normal notification (task_done) */
- dev_dbg(&ihost->pdev->dev, "%s: Normal"
- " - request/task = %p/%p\n",
- __func__, request, task);
-
- task->task_done(task);
- } else {
- dev_warn(&ihost->pdev->dev,
- "%s: Error - request/task"
- " = %p/%p\n",
- __func__, request, task);
-
- sas_task_abort(task);
- }
- }
- }
- if (test_and_clear_bit(IREQ_ABORT_PATH_ACTIVE, &request->flags))
- wake_up_all(&ihost->eventq);
-
- if (!test_bit(IREQ_NO_AUTO_FREE_TAG, &request->flags))
- isci_free_tag(ihost, request->io_tag);
- }
spin_unlock_irq(&ihost->scic_lock);
/* the coalesence timeout doubles at each encoding step, so
diff --git a/drivers/scsi/isci/host.h b/drivers/scsi/isci/host.h
index f8f2c9c..81d96f3 100644
--- a/drivers/scsi/isci/host.h
+++ b/drivers/scsi/isci/host.h
@@ -202,7 +202,6 @@ struct isci_host {
wait_queue_head_t eventq;
struct Scsi_Host *shost;
struct tasklet_struct completion_tasklet;
- struct list_head requests_to_complete;
spinlock_t scic_lock;
struct isci_request *reqs[SCI_MAX_IO_REQUESTS];
struct isci_remote_device devices[SCI_MAX_REMOTE_DEVICES];
@@ -466,6 +465,7 @@ void isci_host_scan_start(struct Scsi_Host *);
u16 isci_alloc_tag(struct isci_host *ihost);
enum sci_status isci_free_tag(struct isci_host *ihost, u16 io_tag);
void isci_tci_free(struct isci_host *ihost, u16 tci);
+void ireq_done(struct isci_host *ihost, struct isci_request *ireq, struct sas_task *task);
int isci_host_init(struct isci_host *);
void isci_host_completion_routine(unsigned long data);
diff --git a/drivers/scsi/isci/init.c b/drivers/scsi/isci/init.c
index 2a781c2..5ae27fb 100644
--- a/drivers/scsi/isci/init.c
+++ b/drivers/scsi/isci/init.c
@@ -559,7 +559,6 @@ static struct isci_host *isci_host_alloc(struct pci_dev *pdev, int id)
return NULL;
}
- INIT_LIST_HEAD(&ihost->requests_to_complete);
for (i = 0; i < SCI_MAX_PORTS; i++) {
struct isci_port *iport = &ihost->ports[i];
diff --git a/drivers/scsi/isci/request.c b/drivers/scsi/isci/request.c
index 6584ef0..d5c80ad 100644
--- a/drivers/scsi/isci/request.c
+++ b/drivers/scsi/isci/request.c
@@ -2748,13 +2748,9 @@ static void isci_request_io_request_complete(struct isci_host *ihost,
enum exec_status status = SAS_ABORTED_TASK;
dev_dbg(&ihost->pdev->dev,
- "%s: request = %p, task = %p,\n"
+ "%s: request = %p, task = %p, "
"task->data_dir = %d completion_status = 0x%x\n",
- __func__,
- request,
- task,
- task->data_dir,
- completion_status);
+ __func__, request, task, task->data_dir, completion_status);
/* The request is done from an SCU HW perspective. */
@@ -2955,9 +2951,6 @@ static void isci_request_io_request_complete(struct isci_host *ihost,
}
spin_unlock_irqrestore(&task->task_state_lock, task_flags);
- /* Add to the completed list. */
- list_add(&request->completed_node, &ihost->requests_to_complete);
-
/* complete the io request to the core. */
sci_controller_complete_io(ihost, request->target_device, request);
@@ -2966,6 +2959,8 @@ static void isci_request_io_request_complete(struct isci_host *ihost,
* task to recognize the already completed case.
*/
set_bit(IREQ_TERMINATED, &request->flags);
+
+ ireq_done(ihost, request, task);
}
static void sci_request_started_state_enter(struct sci_base_state_machine *sm)
@@ -3416,7 +3411,6 @@ static struct isci_request *isci_request_from_tag(struct isci_host *ihost, u16 t
ireq->io_request_completion = NULL;
ireq->flags = 0;
ireq->num_sg_entries = 0;
- INIT_LIST_HEAD(&ireq->completed_node);
return ireq;
}
diff --git a/drivers/scsi/isci/request.h b/drivers/scsi/isci/request.h
index 1a65157..aff9531 100644
--- a/drivers/scsi/isci/request.h
+++ b/drivers/scsi/isci/request.h
@@ -95,8 +95,6 @@ struct isci_request {
struct isci_tmf *tmf_task_ptr; /* When ttype==tmf_task */
} ttype_ptr;
struct isci_host *isci_host;
- /* For use in the requests_to_{complete|abort} lists: */
- struct list_head completed_node;
dma_addr_t request_daddr;
dma_addr_t zero_scatter_daddr;
unsigned int num_sg_entries;
next prev parent reply other threads:[~2012-03-23 0:15 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-23 0:27 [isci-rnc PATCH v1 00/37] remote node context rework Dan Williams
2012-03-23 0:27 ` [isci-rnc PATCH v1 01/37] isci: Manage the link layer hang detect timer for RNC suspensions Dan Williams
2012-03-23 0:27 ` [isci-rnc PATCH v1 02/37] isci: Fixed bug in resumption from RNC Tx/Rx suspend state Dan Williams
2012-03-23 0:28 ` [isci-rnc PATCH v1 03/37] isci: Handle all suspending TC completions Dan Williams
2012-03-23 0:28 ` [isci-rnc PATCH v1 04/37] isci: Terminate outstanding TCs on TX/RX RNC suspensions Dan Williams
2012-03-23 0:28 ` [isci-rnc PATCH v1 05/37] isci: Manage device suspensions during TC terminations Dan Williams
2012-03-23 0:28 ` [isci-rnc PATCH v1 06/37] isci: Remote device must be suspended for NCQ cleanup Dan Williams
2012-03-23 0:28 ` [isci-rnc PATCH v1 07/37] isci: Remote device stop also suspends the RNC and terminates I/O Dan Williams
2012-03-23 0:28 ` [isci-rnc PATCH v1 08/37] isci: Escalate to I_T_Nexus_Reset when the device is gone Dan Williams
2012-03-23 0:28 ` [isci-rnc PATCH v1 09/37] isci: Redesign device suspension, abort, cleanup Dan Williams
2012-03-23 0:28 ` [isci-rnc PATCH v1 10/37] isci: Add suspension cases for RNC INVALIDATING, POSTING states Dan Williams
2012-03-23 0:28 ` [isci-rnc PATCH v1 11/37] isci: Device access in the error path does not depend on IDEV_GONE Dan Williams
2012-03-23 0:28 ` [isci-rnc PATCH v1 12/37] isci: All pending TCs are terminated when the RNC is invalidated Dan Williams
2012-03-23 0:29 ` [isci-rnc PATCH v1 13/37] isci: Only set IDEV_GONE in the device stop path Dan Williams
2012-03-23 0:29 ` [isci-rnc PATCH v1 14/37] isci: Remove isci_device reqs_in_process and dev_node from isci_device Dan Williams
2012-03-23 0:29 ` [isci-rnc PATCH v1 15/37] isci: Distinguish between remote device suspension cases Dan Williams
2012-03-23 0:29 ` [isci-rnc PATCH v1 16/37] isci: Fix the terminated I/O to not call sas_task_abort() Dan Williams
2012-03-23 0:29 ` [isci-rnc PATCH v1 17/37] isci: Save the suspension hint for upcoming suspensions Dan Williams
2012-03-23 0:29 ` [isci-rnc PATCH v1 18/37] isci: Manage the LLHANG timer enable/disable per-device Dan Williams
2012-03-23 0:29 ` [isci-rnc PATCH v1 19/37] isci: Make sure all TCs are terminated and cleaned in LUN reset Dan Williams
2012-03-23 0:29 ` [isci-rnc PATCH v1 20/37] isci: Implement waiting for suspend in the abort path Dan Williams
2012-03-23 0:29 ` [isci-rnc PATCH v1 21/37] isci: When in the abort path, defeat other resume calls until done Dan Williams
2012-03-23 0:29 ` [isci-rnc PATCH v1 22/37] isci: Callbacks to libsas occur under scic_lock and are synchronized Dan Williams
2012-03-23 0:29 ` [isci-rnc PATCH v1 23/37] isci: Manage tag releases differently when aborting tasks Dan Williams
2012-03-23 0:29 ` [isci-rnc PATCH v1 24/37] isci: Fix RNC suspend call for SCI_RESUMING state Dan Williams
2012-03-23 0:30 ` [isci-rnc PATCH v1 25/37] isci: Wait for RNC resumption before leaving the abort path Dan Williams
2012-03-23 0:30 ` [isci-rnc PATCH v1 26/37] isci: Directly control IREQ_ABORT_PATH_ACTIVE when completing TMFs Dan Williams
2012-03-23 0:30 ` [isci-rnc PATCH v1 27/37] isci: Add protocol indicator for TMF requests Dan Williams
2012-03-23 0:30 ` [isci-rnc PATCH v1 28/37] isci: Added timeouts to RNC suspensions in the abort path Dan Williams
2012-03-23 0:30 ` [isci-rnc PATCH v1 29/37] isci: Change the phy control and link reset interface for HW reasons Dan Williams
2012-03-23 0:30 ` [isci-rnc PATCH v1 30/37] isci: Don't wait for an RNC suspend if it's being destroyed Dan Williams
2012-03-23 0:30 ` [isci-rnc PATCH v1 31/37] isci: Restore the ATAPI device RNC management code Dan Williams
2012-03-23 0:30 ` [isci-rnc PATCH v1 32/37] isci: Check IDEV_GONE before performing abort path operations Dan Williams
2012-03-23 0:30 ` Dan Williams [this message]
2012-03-23 0:30 ` [isci-rnc PATCH v1 34/37] isci: Manage the IREQ_NO_AUTO_FREE_TAG under scic_lock Dan Williams
2012-03-23 0:31 ` [isci-rnc PATCH v1 35/37] isci: Fix RNC AWAIT_SUSPENSION->INVALIDATING transition Dan Williams
2012-03-23 0:31 ` [isci-rnc PATCH v1 36/37] isci: Fixed RNC bug that lost the suspension or resumption during destroy Dan Williams
2012-03-23 0:31 ` [isci-rnc PATCH v1 37/37] isci: End the RNC resumption wait when the RNC is destroyed Dan Williams
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20120323003054.18065.2073.stgit@dwillia2-linux.jf.intel.com \
--to=dan.j.williams@intel.com \
--cc=jeffrey.d.skirvin@intel.com \
--cc=linux-scsi@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).