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authorJeff Skirvin <jeffrey.d.skirvin@intel.com>2012-03-04 12:44:53 +0000
committerDan Williams <dan.j.williams@intel.com>2012-05-17 14:33:44 -0700
commitf8381807ebdfffa34c2c5aa38eda33673d1a7adf (patch)
treee91cfb2d072f416fa5c5b72acb267e4945fffe94 /drivers/scsi/isci
parent397497dd61948b0d59d1d21812b93c97b0eeb2dd (diff)
downloadlinux-linaro-stable-f8381807ebdfffa34c2c5aa38eda33673d1a7adf.tar.gz
isci: Remove obviated host callback list.
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>
Diffstat (limited to 'drivers/scsi/isci')
-rw-r--r--drivers/scsi/isci/host.c78
-rw-r--r--drivers/scsi/isci/host.h2
-rw-r--r--drivers/scsi/isci/init.c1
-rw-r--r--drivers/scsi/isci/request.c14
-rw-r--r--drivers/scsi/isci/request.h2
5 files changed, 31 insertions, 66 deletions
diff --git a/drivers/scsi/isci/host.c b/drivers/scsi/isci/host.c
index ef2790faeab8..45385f531649 100644
--- a/drivers/scsi/isci/host.c
+++ b/drivers/scsi/isci/host.c
@@ -1077,6 +1077,32 @@ 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
@@ -1088,62 +1114,10 @@ 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 eaa13c0be09a..8e8b46322c64 100644
--- a/drivers/scsi/isci/host.h
+++ b/drivers/scsi/isci/host.h
@@ -204,7 +204,6 @@ struct isci_host {
unsigned long flags;
wait_queue_head_t eventq;
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];
@@ -473,6 +472,7 @@ 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 f2a8a3346307..47e28b555029 100644
--- a/drivers/scsi/isci/init.c
+++ b/drivers/scsi/isci/init.c
@@ -555,7 +555,6 @@ 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 6c530e4275e2..7a0431c73493 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 1a651579bb33..aff95317fcf4 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;