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>
This commit is contained in:
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@ -284,23 +284,16 @@ static void scic_sds_controller_task_completion(struct scic_sds_controller *scic
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u32 completion_entry)
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{
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u32 index;
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struct scic_sds_request *io_request;
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struct scic_sds_request *sci_req;
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index = SCU_GET_COMPLETION_INDEX(completion_entry);
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io_request = scic->io_request_table[index];
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sci_req = scic->io_request_table[index];
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/* Make sure that we really want to process this IO request */
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if (
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(io_request != NULL)
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&& (io_request->io_tag != SCI_CONTROLLER_INVALID_IO_TAG)
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&& (
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scic_sds_io_tag_get_sequence(io_request->io_tag)
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== scic->io_request_sequence[index]
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)
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) {
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if (sci_req && sci_req->io_tag != SCI_CONTROLLER_INVALID_IO_TAG &&
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ISCI_TAG_SEQ(sci_req->io_tag) == scic->io_request_sequence[index])
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/* Yep this is a valid io request pass it along to the io request handler */
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scic_sds_io_request_tc_completion(io_request, completion_entry);
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}
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scic_sds_io_request_tc_completion(sci_req, completion_entry);
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}
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static void scic_sds_controller_sdma_completion(struct scic_sds_controller *scic,
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@ -2682,37 +2675,28 @@ void scic_sds_controller_copy_task_context(
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sci_req->task_context_buffer = task_context_buffer;
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}
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/**
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* This method returns the task context buffer for the given io tag.
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* @scic:
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* @io_tag:
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*
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* struct scu_task_context*
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*/
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struct scu_task_context *scic_sds_controller_get_task_context_buffer(
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struct scic_sds_controller *scic,
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u16 io_tag
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) {
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u16 task_index = scic_sds_io_tag_get_index(io_tag);
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struct scu_task_context *scic_sds_controller_get_task_context_buffer(struct scic_sds_controller *scic,
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u16 io_tag)
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{
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u16 tci = ISCI_TAG_TCI(io_tag);
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if (task_index < scic->task_context_entries) {
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return &scic->task_context_table[task_index];
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if (tci < scic->task_context_entries) {
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return &scic->task_context_table[tci];
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}
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return NULL;
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}
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struct scic_sds_request *scic_request_by_tag(struct scic_sds_controller *scic,
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u16 io_tag)
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struct scic_sds_request *scic_request_by_tag(struct scic_sds_controller *scic, u16 io_tag)
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{
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u16 task_index;
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u16 task_sequence;
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task_index = scic_sds_io_tag_get_index(io_tag);
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task_index = ISCI_TAG_TCI(io_tag);
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if (task_index < scic->task_context_entries) {
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if (task_index < scic->task_context_entries) {
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if (scic->io_request_table[task_index] != NULL) {
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task_sequence = scic_sds_io_tag_get_sequence(io_tag);
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task_sequence = ISCI_TAG_SEQ(io_tag);
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if (task_sequence == scic->io_request_sequence[task_index]) {
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return scic->io_request_table[task_index];
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@ -2875,11 +2859,10 @@ void scic_sds_controller_release_frame(
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* successfully started the IO request. SCI_SUCCESS if the IO request was
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* successfully started. Determine the failure situations and return values.
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*/
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enum sci_status scic_controller_start_io(
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struct scic_sds_controller *scic,
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struct scic_sds_remote_device *rdev,
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struct scic_sds_request *req,
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u16 io_tag)
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enum sci_status scic_controller_start_io(struct scic_sds_controller *scic,
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struct scic_sds_remote_device *rdev,
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struct scic_sds_request *req,
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u16 io_tag)
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{
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enum sci_status status;
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@ -2892,7 +2875,7 @@ enum sci_status scic_controller_start_io(
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if (status != SCI_SUCCESS)
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return status;
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scic->io_request_table[scic_sds_io_tag_get_index(req->io_tag)] = req;
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scic->io_request_table[ISCI_TAG_TCI(req->io_tag)] = req;
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scic_sds_controller_post_request(scic, scic_sds_request_get_post_context(req));
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return SCI_SUCCESS;
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}
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@ -2979,7 +2962,7 @@ enum sci_status scic_controller_complete_io(
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if (status != SCI_SUCCESS)
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return status;
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index = scic_sds_io_tag_get_index(request->io_tag);
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index = ISCI_TAG_TCI(request->io_tag);
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scic->io_request_table[index] = NULL;
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return SCI_SUCCESS;
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default:
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@ -2998,7 +2981,7 @@ enum sci_status scic_controller_continue_io(struct scic_sds_request *sci_req)
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return SCI_FAILURE_INVALID_STATE;
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}
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scic->io_request_table[scic_sds_io_tag_get_index(sci_req->io_tag)] = sci_req;
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scic->io_request_table[ISCI_TAG_TCI(sci_req->io_tag)] = sci_req;
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scic_sds_controller_post_request(scic, scic_sds_request_get_post_context(sci_req));
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return SCI_SUCCESS;
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}
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@ -3050,7 +3033,7 @@ enum sci_task_status scic_controller_start_task(
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status = scic_sds_remote_device_start_task(scic, rdev, req);
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switch (status) {
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case SCI_FAILURE_RESET_DEVICE_PARTIAL_SUCCESS:
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scic->io_request_table[scic_sds_io_tag_get_index(req->io_tag)] = req;
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scic->io_request_table[ISCI_TAG_TCI(req->io_tag)] = req;
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/*
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* We will let framework know this task request started successfully,
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@ -3059,7 +3042,7 @@ enum sci_task_status scic_controller_start_task(
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*/
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return SCI_SUCCESS;
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case SCI_SUCCESS:
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scic->io_request_table[scic_sds_io_tag_get_index(req->io_tag)] = req;
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scic->io_request_table[ISCI_TAG_TCI(req->io_tag)] = req;
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scic_sds_controller_post_request(scic,
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scic_sds_request_get_post_context(req));
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@ -3096,14 +3079,12 @@ enum sci_task_status scic_controller_start_task(
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u16 scic_controller_allocate_io_tag(struct scic_sds_controller *scic)
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{
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struct isci_host *ihost = scic_to_ihost(scic);
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u16 tci;
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u16 seq;
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if (isci_tci_space(ihost)) {
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tci = isci_tci_alloc(ihost);
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seq = scic->io_request_sequence[tci];
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u16 tci = isci_tci_alloc(ihost);
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u8 seq = scic->io_request_sequence[tci];
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return scic_sds_io_tag_construct(seq, tci);
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return ISCI_TAG(seq, tci);
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}
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return SCI_CONTROLLER_INVALID_IO_TAG;
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@ -3138,22 +3119,17 @@ enum sci_status scic_controller_free_io_tag(struct scic_sds_controller *scic,
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u16 io_tag)
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{
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struct isci_host *ihost = scic_to_ihost(scic);
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u16 sequence;
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u16 index;
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BUG_ON(io_tag == SCI_CONTROLLER_INVALID_IO_TAG);
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sequence = scic_sds_io_tag_get_sequence(io_tag);
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index = scic_sds_io_tag_get_index(io_tag);
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u16 tci = ISCI_TAG_TCI(io_tag);
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u16 seq = ISCI_TAG_SEQ(io_tag);
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/* prevent tail from passing head */
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if (isci_tci_active(ihost) == 0)
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return SCI_FAILURE_INVALID_IO_TAG;
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if (sequence == scic->io_request_sequence[index]) {
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scic_sds_io_sequence_increment(scic->io_request_sequence[index]);
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if (seq == scic->io_request_sequence[tci]) {
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scic->io_request_sequence[tci] = (seq+1) & (SCI_MAX_SEQ-1);
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isci_tci_free(ihost, index);
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isci_tci_free(ihost, ISCI_TAG_TCI(io_tag));
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return SCI_SUCCESS;
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}
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@ -184,13 +184,8 @@ struct scic_sds_controller {
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*/
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struct scic_power_control power_control;
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/**
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* This field is the array of sequence values for the IO Tag fields. Even
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* though only 4 bits of the field is used for the sequence the sequence is 16
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* bits in size so the sequence can be bitwise or'd with the TCi to build the
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* IO Tag value.
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*/
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u16 io_request_sequence[SCI_MAX_IO_REQUESTS];
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/* sequence number per tci */
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u8 io_request_sequence[SCI_MAX_IO_REQUESTS];
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/**
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* This field in the array of sequence values for the RNi. These are used
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@ -552,40 +547,12 @@ static inline struct isci_host *scic_to_ihost(struct scic_sds_controller *scic)
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*/
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#define scic_sds_controller_get_protocol_engine_group(controller) 0
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/**
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* scic_sds_io_tag_construct() -
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*
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* This macro constructs an IO tag from the sequence and index values.
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*/
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#define scic_sds_io_tag_construct(sequence, task_index) \
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((sequence) << 12 | (task_index))
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/* see scic_controller_io_tag_allocate|free for how seq and tci are built */
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#define ISCI_TAG(seq, tci) (((u16) (seq)) << 12 | tci)
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/**
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* scic_sds_io_tag_get_sequence() -
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*
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* This macro returns the IO sequence from the IO tag value.
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*/
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#define scic_sds_io_tag_get_sequence(io_tag) \
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(((io_tag) & 0xF000) >> 12)
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/**
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* scic_sds_io_tag_get_index() -
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*
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* This macro returns the TCi from the io tag value
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*/
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#define scic_sds_io_tag_get_index(io_tag) \
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((io_tag) & 0x0FFF)
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/**
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* scic_sds_io_sequence_increment() -
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*
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* This is a helper macro to increment the io sequence count. We may find in
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* the future that it will be faster to store the sequence count in such a way
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* as we dont perform the shift operation to build io tag values so therefore
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* need a way to incrment them correctly
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*/
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#define scic_sds_io_sequence_increment(value) \
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((value) = (((value) + 1) & 0x000F))
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/* these are returned by the hardware, so sanitize them */
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#define ISCI_TAG_SEQ(tag) (((tag) >> 12) & (SCI_MAX_SEQ-1))
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#define ISCI_TAG_TCI(tag) ((tag) & (SCI_MAX_IO_REQUESTS-1))
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/* expander attached sata devices require 3 rnc slots */
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static inline int scic_sds_remote_device_node_count(struct scic_sds_remote_device *sci_dev)
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@ -83,6 +83,7 @@ enum sci_controller_mode {
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#define SCI_MAX_SMP_PHYS (384) /* not silicon constrained */
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#define SCI_MAX_REMOTE_DEVICES (256UL)
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#define SCI_MAX_IO_REQUESTS (256UL)
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#define SCI_MAX_SEQ (16)
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#define SCI_MAX_MSIX_MESSAGES (2)
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#define SCI_MAX_SCATTER_GATHER_ELEMENTS 130 /* not silicon constrained */
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#define SCI_MAX_CONTROLLERS 2
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@ -113,6 +114,7 @@ static inline void check_sizes(void)
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BUILD_BUG_ON_NOT_POWER_OF_2(SCU_MAX_COMPLETION_QUEUE_ENTRIES);
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BUILD_BUG_ON(SCU_MAX_UNSOLICITED_FRAMES > SCU_ABSOLUTE_MAX_UNSOLICITED_FRAMES);
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BUILD_BUG_ON_NOT_POWER_OF_2(SCI_MAX_IO_REQUESTS);
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BUILD_BUG_ON_NOT_POWER_OF_2(SCI_MAX_SEQ);
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}
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/**
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@ -689,23 +689,16 @@ static void scic_sds_port_construct_dummy_rnc(struct scic_sds_port *sci_port, u1
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rnc->ssp.arbitration_wait_time = 0;
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}
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/**
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* scic_sds_port_construct_dummy_task() - create dummy task for si workaround
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* @sci_port The logical port on which we need to create the
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* remote node context.
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* context.
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* @tci The remote node index for this remote node context.
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*
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* This routine will construct a dummy task context data structure. This
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/*
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* construct a dummy task context data structure. This
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* structure will be posted to the hardwre to work around a scheduler error
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* in the hardware.
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*
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*/
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static void scic_sds_port_construct_dummy_task(struct scic_sds_port *sci_port, u16 tci)
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static void scic_sds_port_construct_dummy_task(struct scic_sds_port *sci_port, u16 tag)
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{
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struct scu_task_context *task_context;
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task_context = scic_sds_controller_get_task_context_buffer(sci_port->owning_controller, tci);
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task_context = scic_sds_controller_get_task_context_buffer(sci_port->owning_controller, tag);
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memset(task_context, 0, sizeof(struct scu_task_context));
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@ -716,7 +709,7 @@ static void scic_sds_port_construct_dummy_task(struct scic_sds_port *sci_port, u
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task_context->protocol_engine_index = 0;
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task_context->logical_port_index = sci_port->physical_port_index;
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task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_SSP;
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task_context->task_index = scic_sds_io_tag_get_index(tci);
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task_context->task_index = ISCI_TAG_TCI(tag);
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task_context->valid = SCU_TASK_CONTEXT_VALID;
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task_context->context_type = SCU_TASK_CONTEXT_TYPE;
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@ -258,7 +258,7 @@ static void scu_ssp_reqeust_construct_task_context(
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SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) |
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(scic_sds_port_get_index(target_port) <<
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SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) |
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scic_sds_io_tag_get_index(sds_request->io_tag));
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ISCI_TAG_TCI(sds_request->io_tag));
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} else {
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/*
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* Build the task context now since we have already read
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@ -433,7 +433,7 @@ static void scu_sata_reqeust_construct_task_context(
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SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) |
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(scic_sds_port_get_index(target_port) <<
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SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) |
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scic_sds_io_tag_get_index(sci_req->io_tag));
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ISCI_TAG_TCI(sci_req->io_tag));
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} else {
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/*
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* Build the task context now since we have already read
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@ -741,7 +741,7 @@ static u32 sci_req_tx_bytes(struct scic_sds_request *sci_req)
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*/
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ret_val = readl(scu_reg_base +
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(SCU_TASK_CONTEXT_SRAM + offsetof(struct scu_task_context, type.ssp.data_offset)) +
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((sizeof(struct scu_task_context)) * scic_sds_io_tag_get_index(sci_req->io_tag)));
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((sizeof(struct scu_task_context)) * ISCI_TAG_TCI(sci_req->io_tag)));
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}
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return ret_val;
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@ -777,7 +777,7 @@ enum sci_status scic_sds_request_start(struct scic_sds_request *sci_req)
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if (sci_req->io_tag != SCI_CONTROLLER_INVALID_IO_TAG) {
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task_context = sci_req->task_context_buffer;
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task_context->task_index = scic_sds_io_tag_get_index(sci_req->io_tag);
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task_context->task_index = ISCI_TAG_TCI(sci_req->io_tag);
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switch (task_context->protocol_type) {
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case SCU_TASK_CONTEXT_PROTOCOL_SMP:
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@ -811,7 +811,7 @@ enum sci_status scic_sds_request_start(struct scic_sds_request *sci_req)
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scic_sds_controller_copy_task_context(scic, sci_req);
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/* Add to the post_context the io tag value */
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sci_req->post_context |= scic_sds_io_tag_get_index(sci_req->io_tag);
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sci_req->post_context |= ISCI_TAG_TCI(sci_req->io_tag);
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/* Everything is good go ahead and change state */
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sci_change_state(&sci_req->sm, SCI_REQ_STARTED);
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@ -3325,7 +3325,7 @@ scu_smp_request_construct_task_context(struct scic_sds_request *sci_req,
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SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) |
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(scic_sds_port_get_index(sci_port) <<
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SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) |
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scic_sds_io_tag_get_index(sci_req->io_tag));
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ISCI_TAG_TCI(sci_req->io_tag));
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} else {
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/*
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* Build the task context now since we have already read
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