isci: cleanup tag macros
A tag is a 16 bit number where the upper four bits is a sequence number
and the remainder is the task context index (tci). Sanitize the macro
names and shave 256-bytes out of scic_sds_controller by reducing the size of
io_request_sequence.
scic_sds_io_tag_construct --> ISCI_TAG
scic_sds_io_tag_get_sequence --> ISCI_TAG_SEQ
scic_sds_io_tag_get_index() --> ISCI_TAG_TCI
scic_sds_io_sequence_increment() [delete / open code]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/scsi/isci/host.c b/drivers/scsi/isci/host.c
index 343655b..3c7042b 100644
--- a/drivers/scsi/isci/host.c
+++ b/drivers/scsi/isci/host.c
@@ -284,23 +284,16 @@
u32 completion_entry)
{
u32 index;
- struct scic_sds_request *io_request;
+ struct scic_sds_request *sci_req;
index = SCU_GET_COMPLETION_INDEX(completion_entry);
- io_request = scic->io_request_table[index];
+ sci_req = scic->io_request_table[index];
/* Make sure that we really want to process this IO request */
- if (
- (io_request != NULL)
- && (io_request->io_tag != SCI_CONTROLLER_INVALID_IO_TAG)
- && (
- scic_sds_io_tag_get_sequence(io_request->io_tag)
- == scic->io_request_sequence[index]
- )
- ) {
+ if (sci_req && 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(io_request, completion_entry);
- }
+ scic_sds_io_request_tc_completion(sci_req, completion_entry);
}
static void scic_sds_controller_sdma_completion(struct scic_sds_controller *scic,
@@ -2682,37 +2675,28 @@
sci_req->task_context_buffer = task_context_buffer;
}
-/**
- * This method returns the task context buffer for the given io tag.
- * @scic:
- * @io_tag:
- *
- * struct scu_task_context*
- */
-struct scu_task_context *scic_sds_controller_get_task_context_buffer(
- struct scic_sds_controller *scic,
- u16 io_tag
- ) {
- u16 task_index = scic_sds_io_tag_get_index(io_tag);
+struct scu_task_context *scic_sds_controller_get_task_context_buffer(struct scic_sds_controller *scic,
+ u16 io_tag)
+{
+ u16 tci = ISCI_TAG_TCI(io_tag);
- if (task_index < scic->task_context_entries) {
- return &scic->task_context_table[task_index];
+ if (tci < scic->task_context_entries) {
+ return &scic->task_context_table[tci];
}
return NULL;
}
-struct scic_sds_request *scic_request_by_tag(struct scic_sds_controller *scic,
- u16 io_tag)
+struct scic_sds_request *scic_request_by_tag(struct scic_sds_controller *scic, u16 io_tag)
{
u16 task_index;
u16 task_sequence;
- task_index = scic_sds_io_tag_get_index(io_tag);
+ task_index = ISCI_TAG_TCI(io_tag);
- if (task_index < scic->task_context_entries) {
+ if (task_index < scic->task_context_entries) {
if (scic->io_request_table[task_index] != NULL) {
- task_sequence = scic_sds_io_tag_get_sequence(io_tag);
+ task_sequence = ISCI_TAG_SEQ(io_tag);
if (task_sequence == scic->io_request_sequence[task_index]) {
return scic->io_request_table[task_index];
@@ -2875,11 +2859,10 @@
* successfully started the IO request. SCI_SUCCESS if the IO request was
* successfully started. Determine the failure situations and return values.
*/
-enum sci_status scic_controller_start_io(
- struct scic_sds_controller *scic,
- struct scic_sds_remote_device *rdev,
- struct scic_sds_request *req,
- u16 io_tag)
+enum sci_status scic_controller_start_io(struct scic_sds_controller *scic,
+ struct scic_sds_remote_device *rdev,
+ struct scic_sds_request *req,
+ u16 io_tag)
{
enum sci_status status;
@@ -2892,7 +2875,7 @@
if (status != SCI_SUCCESS)
return status;
- scic->io_request_table[scic_sds_io_tag_get_index(req->io_tag)] = req;
+ scic->io_request_table[ISCI_TAG_TCI(req->io_tag)] = req;
scic_sds_controller_post_request(scic, scic_sds_request_get_post_context(req));
return SCI_SUCCESS;
}
@@ -2979,7 +2962,7 @@
if (status != SCI_SUCCESS)
return status;
- index = scic_sds_io_tag_get_index(request->io_tag);
+ index = ISCI_TAG_TCI(request->io_tag);
scic->io_request_table[index] = NULL;
return SCI_SUCCESS;
default:
@@ -2998,7 +2981,7 @@
return SCI_FAILURE_INVALID_STATE;
}
- scic->io_request_table[scic_sds_io_tag_get_index(sci_req->io_tag)] = sci_req;
+ scic->io_request_table[ISCI_TAG_TCI(sci_req->io_tag)] = sci_req;
scic_sds_controller_post_request(scic, scic_sds_request_get_post_context(sci_req));
return SCI_SUCCESS;
}
@@ -3050,7 +3033,7 @@
status = scic_sds_remote_device_start_task(scic, rdev, req);
switch (status) {
case SCI_FAILURE_RESET_DEVICE_PARTIAL_SUCCESS:
- scic->io_request_table[scic_sds_io_tag_get_index(req->io_tag)] = req;
+ scic->io_request_table[ISCI_TAG_TCI(req->io_tag)] = req;
/*
* We will let framework know this task request started successfully,
@@ -3059,7 +3042,7 @@
*/
return SCI_SUCCESS;
case SCI_SUCCESS:
- scic->io_request_table[scic_sds_io_tag_get_index(req->io_tag)] = req;
+ scic->io_request_table[ISCI_TAG_TCI(req->io_tag)] = req;
scic_sds_controller_post_request(scic,
scic_sds_request_get_post_context(req));
@@ -3096,14 +3079,12 @@
u16 scic_controller_allocate_io_tag(struct scic_sds_controller *scic)
{
struct isci_host *ihost = scic_to_ihost(scic);
- u16 tci;
- u16 seq;
if (isci_tci_space(ihost)) {
- tci = isci_tci_alloc(ihost);
- seq = scic->io_request_sequence[tci];
+ u16 tci = isci_tci_alloc(ihost);
+ u8 seq = scic->io_request_sequence[tci];
- return scic_sds_io_tag_construct(seq, tci);
+ return ISCI_TAG(seq, tci);
}
return SCI_CONTROLLER_INVALID_IO_TAG;
@@ -3138,22 +3119,17 @@
u16 io_tag)
{
struct isci_host *ihost = scic_to_ihost(scic);
- u16 sequence;
- u16 index;
-
- BUG_ON(io_tag == SCI_CONTROLLER_INVALID_IO_TAG);
-
- sequence = scic_sds_io_tag_get_sequence(io_tag);
- index = scic_sds_io_tag_get_index(io_tag);
+ u16 tci = ISCI_TAG_TCI(io_tag);
+ u16 seq = ISCI_TAG_SEQ(io_tag);
/* prevent tail from passing head */
if (isci_tci_active(ihost) == 0)
return SCI_FAILURE_INVALID_IO_TAG;
- if (sequence == scic->io_request_sequence[index]) {
- scic_sds_io_sequence_increment(scic->io_request_sequence[index]);
+ if (seq == scic->io_request_sequence[tci]) {
+ scic->io_request_sequence[tci] = (seq+1) & (SCI_MAX_SEQ-1);
- isci_tci_free(ihost, index);
+ isci_tci_free(ihost, ISCI_TAG_TCI(io_tag));
return SCI_SUCCESS;
}