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isci: preallocate requests

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the dma_pool interface is optimized for object_size << page_size which
is not the case with isci_request objects and the dma_pool routines show
up in the top of the profile.

The old io_request_table which tracked whether tci slots were in-flight
or not is replaced with an IREQ_ACTIVE flag per request.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams
2011-06-17 14:18:39 -07:00
parent 38d8879bae
commit db05625098
6 changed files with 85 additions and 139 deletions
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70
drivers/scsi/isci/host.c
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@@ -255,14 +255,14 @@ static bool scic_sds_controller_error_isr(struct scic_sds_controller *scic)
static void scic_sds_controller_task_completion(struct scic_sds_controller *scic,
u32 completion_entry)
{
u32 index;
struct scic_sds_request *sci_req;
index = SCU_GET_COMPLETION_INDEX(completion_entry);
sci_req = scic->io_request_table[index];
u32 index = SCU_GET_COMPLETION_INDEX(completion_entry);
struct isci_host *ihost = scic_to_ihost(scic);
struct isci_request *ireq = ihost->reqs[index];
struct scic_sds_request *sci_req = &ireq->sci;
/* Make sure that we really want to process this IO request */
if (sci_req && sci_req->io_tag != SCI_CONTROLLER_INVALID_IO_TAG &&
if (test_bit(IREQ_ACTIVE, &ireq->flags) &&
sci_req->io_tag != SCI_CONTROLLER_INVALID_IO_TAG &&
ISCI_TAG_SEQ(sci_req->io_tag) == scic->io_request_sequence[index])
/* Yep this is a valid io request pass it along to the io request handler */
scic_sds_io_request_tc_completion(sci_req, completion_entry);
@@ -280,7 +280,7 @@ static void scic_sds_controller_sdma_completion(struct scic_sds_controller *scic
switch (scu_get_command_request_type(completion_entry)) {
case SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC:
case SCU_CONTEXT_COMMAND_REQUEST_TYPE_DUMP_TC:
io_request = scic->io_request_table[index];
io_request = &scic_to_ihost(scic)->reqs[index]->sci;
dev_warn(scic_to_dev(scic),
"%s: SCIC SDS Completion type SDMA %x for io request "
"%p\n",
@@ -418,7 +418,7 @@ static void scic_sds_controller_event_completion(struct scic_sds_controller *sci
break;
case SCU_EVENT_TYPE_TRANSPORT_ERROR:
io_request = scic->io_request_table[index];
io_request = &ihost->reqs[index]->sci;
scic_sds_io_request_event_handler(io_request, completion_entry);
break;
@@ -426,7 +426,7 @@ static void scic_sds_controller_event_completion(struct scic_sds_controller *sci
switch (scu_get_event_specifier(completion_entry)) {
case SCU_EVENT_SPECIFIC_SMP_RESPONSE_NO_PE:
case SCU_EVENT_SPECIFIC_TASK_TIMEOUT:
io_request = scic->io_request_table[index];
io_request = &ihost->reqs[index]->sci;
if (io_request != NULL)
scic_sds_io_request_event_handler(io_request, completion_entry);
else
@@ -1187,9 +1187,6 @@ static void isci_host_completion_routine(unsigned long data)
spin_lock_irq(&isci_host->scic_lock);
isci_free_tag(isci_host, request->sci.io_tag);
spin_unlock_irq(&isci_host->scic_lock);
/* Free the request object. */
isci_request_free(isci_host, request);
}
list_for_each_entry_safe(request, next_request, &errored_request_list,
completed_node) {
@@ -1227,9 +1224,6 @@ static void isci_host_completion_routine(unsigned long data)
list_del_init(&request->dev_node);
isci_free_tag(isci_host, request->sci.io_tag);
spin_unlock_irq(&isci_host->scic_lock);
/* Free the request object. */
isci_request_free(isci_host, request);
}
}
@@ -2469,13 +2463,6 @@ int isci_host_init(struct isci_host *isci_host)
if (err)
return err;
isci_host->dma_pool = dmam_pool_create(DRV_NAME, &isci_host->pdev->dev,
sizeof(struct isci_request),
SLAB_HWCACHE_ALIGN, 0);
if (!isci_host->dma_pool)
return -ENOMEM;
for (i = 0; i < SCI_MAX_PORTS; i++)
isci_port_init(&isci_host->ports[i], isci_host, i);
@@ -2489,6 +2476,25 @@ int isci_host_init(struct isci_host *isci_host)
INIT_LIST_HEAD(&idev->node);
}
for (i = 0; i < SCI_MAX_IO_REQUESTS; i++) {
struct isci_request *ireq;
dma_addr_t dma;
ireq = dmam_alloc_coherent(&isci_host->pdev->dev,
sizeof(struct isci_request), &dma,
GFP_KERNEL);
if (!ireq)
return -ENOMEM;
ireq->sci.tc = &isci_host->sci.task_context_table[i];
ireq->sci.owning_controller = &isci_host->sci;
spin_lock_init(&ireq->state_lock);
ireq->request_daddr = dma;
ireq->isci_host = isci_host;
isci_host->reqs[i] = ireq;
}
return 0;
}
@@ -2602,12 +2608,13 @@ struct scic_sds_request *scic_request_by_tag(struct scic_sds_controller *scic, u
task_index = ISCI_TAG_TCI(io_tag);
if (task_index < scic->task_context_entries) {
if (scic->io_request_table[task_index] != NULL) {
struct isci_request *ireq = scic_to_ihost(scic)->reqs[task_index];
if (test_bit(IREQ_ACTIVE, &ireq->flags)) {
task_sequence = ISCI_TAG_SEQ(io_tag);
if (task_sequence == scic->io_request_sequence[task_index]) {
return scic->io_request_table[task_index];
}
if (task_sequence == scic->io_request_sequence[task_index])
return &ireq->sci;
}
}
@@ -2820,7 +2827,7 @@ enum sci_status scic_controller_start_io(struct scic_sds_controller *scic,
if (status != SCI_SUCCESS)
return status;
scic->io_request_table[ISCI_TAG_TCI(req->io_tag)] = req;
set_bit(IREQ_ACTIVE, &sci_req_to_ireq(req)->flags);
scic_sds_controller_post_request(scic, scic_sds_request_get_post_context(req));
return SCI_SUCCESS;
}
@@ -2897,7 +2904,7 @@ enum sci_status scic_controller_complete_io(
return status;
index = ISCI_TAG_TCI(request->io_tag);
scic->io_request_table[index] = NULL;
clear_bit(IREQ_ACTIVE, &sci_req_to_ireq(request)->flags);
return SCI_SUCCESS;
default:
dev_warn(scic_to_dev(scic), "invalid state to complete I/O");
@@ -2915,7 +2922,7 @@ enum sci_status scic_controller_continue_io(struct scic_sds_request *sci_req)
return SCI_FAILURE_INVALID_STATE;
}
scic->io_request_table[ISCI_TAG_TCI(sci_req->io_tag)] = sci_req;
set_bit(IREQ_ACTIVE, &sci_req_to_ireq(sci_req)->flags);
scic_sds_controller_post_request(scic, scic_sds_request_get_post_context(sci_req));
return SCI_SUCCESS;
}
@@ -2934,6 +2941,7 @@ enum sci_task_status scic_controller_start_task(
struct scic_sds_remote_device *rdev,
struct scic_sds_request *req)
{
struct isci_request *ireq = sci_req_to_ireq(req);
enum sci_status status;
if (scic->sm.current_state_id != SCIC_READY) {
@@ -2947,7 +2955,7 @@ enum sci_task_status scic_controller_start_task(
status = scic_sds_remote_device_start_task(scic, rdev, req);
switch (status) {
case SCI_FAILURE_RESET_DEVICE_PARTIAL_SUCCESS:
scic->io_request_table[ISCI_TAG_TCI(req->io_tag)] = req;
set_bit(IREQ_ACTIVE, &ireq->flags);
/*
* We will let framework know this task request started successfully,
@@ -2956,7 +2964,7 @@ enum sci_task_status scic_controller_start_task(
*/
return SCI_SUCCESS;
case SCI_SUCCESS:
scic->io_request_table[ISCI_TAG_TCI(req->io_tag)] = req;
set_bit(IREQ_ACTIVE, &ireq->flags);
scic_sds_controller_post_request(scic,
scic_sds_request_get_post_context(req));