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isci: Remove obviated host callback list.

Browse Source 
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>
This commit is contained in:
Jeff Skirvin 2012-03-04 12:44:53 +00:00 committed by Dan Williams
parent 397497dd61
commit f8381807eb
5 changed files with 31 additions and 66 deletions
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78
drivers/scsi/isci/host.c
View File

@ -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

2
drivers/scsi/isci/host.h
View File

@ -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);

1
drivers/scsi/isci/init.c
View File

@ -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];

14
drivers/scsi/isci/request.c
View File

@ -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;
}

2
drivers/scsi/isci/request.h
View File

@ -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;