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authorDan Williams <dan.j.williams@intel.com>2011-05-11 08:27:47 -0700
committerDan Williams <dan.j.williams@intel.com>2011-07-03 04:04:48 -0700
commitd1c637c35b33ddd2b405956e04b50939bb10ed2a (patch)
treee9283b5d36032d736bfab714283d60c616c546d4 /drivers/scsi/isci/request.c
parentf4636a7b2ab8288466b83a8459d47c43143a70dc (diff)
isci: unify request frame handlers
Unify the implementation in scic_sds_io_request_frame_handler and kill the state handler. Reported-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/scsi/isci/request.c')
-rw-r--r--drivers/scsi/isci/request.c1020
1 files changed, 421 insertions, 599 deletions
diff --git a/drivers/scsi/isci/request.c b/drivers/scsi/isci/request.c
index 41a418d8b337..b9f97e8cc5e0 100644
--- a/drivers/scsi/isci/request.c
+++ b/drivers/scsi/isci/request.c
@@ -907,34 +907,6 @@ enum sci_status scic_sds_io_request_event_handler(
return SCI_FAILURE_INVALID_STATE;
}
-/**
- *
- * @sci_req: The SCIC_SDS_IO_REQUEST_T object for which the start
- * operation is to be executed.
- * @frame_index: The frame index returned by the hardware for the reqeust
- * object.
- *
- * This method invokes the core state frame handler for the
- * SCIC_SDS_IO_REQUEST_T object. enum sci_status
- */
-enum sci_status scic_sds_io_request_frame_handler(
- struct scic_sds_request *request,
- u32 frame_index)
-{
- if (request->state_handlers->frame_handler)
- return request->state_handlers->frame_handler(request, frame_index);
-
- dev_warn(scic_to_dev(request->owning_controller),
- "%s: SCIC IO Request given unexpected frame %x while in "
- "state %d\n",
- __func__,
- frame_index,
- sci_base_state_machine_get_state(&request->state_machine));
-
- scic_sds_controller_release_frame(request->owning_controller, frame_index);
- return SCI_FAILURE_INVALID_STATE;
-}
-
/*
* This function copies response data for requests returning response data
* instead of sense data.
@@ -1151,81 +1123,6 @@ scic_sds_io_request_tc_completion(struct scic_sds_request *request, u32 completi
/*
* This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T
- * object receives a scic_sds_request_frame_handler() request. This method
- * first determines the frame type received. If this is a response frame then
- * the response data is copied to the io request response buffer for processing
- * at completion time. If the frame type is not a response buffer an error is
- * logged. enum sci_status SCI_SUCCESS SCI_FAILURE_INVALID_PARAMETER_VALUE
- */
-static enum sci_status
-scic_sds_request_started_state_frame_handler(struct scic_sds_request *sci_req,
- u32 frame_index)
-{
- enum sci_status status;
- u32 *frame_header;
- struct ssp_frame_hdr ssp_hdr;
- ssize_t word_cnt;
-
- status = scic_sds_unsolicited_frame_control_get_header(
- &(scic_sds_request_get_controller(sci_req)->uf_control),
- frame_index,
- (void **)&frame_header);
-
- word_cnt = sizeof(struct ssp_frame_hdr) / sizeof(u32);
- sci_swab32_cpy(&ssp_hdr, frame_header, word_cnt);
-
- if (ssp_hdr.frame_type == SSP_RESPONSE) {
- struct ssp_response_iu *resp_iu;
- ssize_t word_cnt = SSP_RESP_IU_MAX_SIZE / sizeof(u32);
-
- status = scic_sds_unsolicited_frame_control_get_buffer(
- &(scic_sds_request_get_controller(sci_req)->uf_control),
- frame_index,
- (void **)&resp_iu);
-
- sci_swab32_cpy(&sci_req->ssp.rsp,
- resp_iu, word_cnt);
-
- resp_iu = &sci_req->ssp.rsp;
-
- if ((resp_iu->datapres == 0x01) ||
- (resp_iu->datapres == 0x02)) {
- scic_sds_request_set_status(
- sci_req,
- SCU_TASK_DONE_CHECK_RESPONSE,
- SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR);
- } else
- scic_sds_request_set_status(
- sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS);
- } else {
- /* This was not a response frame why did it get forwarded? */
- dev_err(scic_to_dev(sci_req->owning_controller),
- "%s: SCIC IO Request 0x%p received unexpected "
- "frame %d type 0x%02x\n",
- __func__,
- sci_req,
- frame_index,
- ssp_hdr.frame_type);
- }
-
- /*
- * In any case we are done with this frame buffer return it to the
- * controller
- */
- scic_sds_controller_release_frame(
- sci_req->owning_controller, frame_index);
-
- return SCI_SUCCESS;
-}
-
-/*
- * *****************************************************************************
- * * COMPLETED STATE HANDLERS
- * ***************************************************************************** */
-
-
-/*
- * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T
* object receives a scic_sds_request_complete() request. This method frees up
* any io request resources that have been allocated and transitions the
* request to its final state. Consider stopping the state machine instead of
@@ -1281,24 +1178,6 @@ static enum sci_status scic_sds_request_aborting_state_tc_completion_handler(
return SCI_SUCCESS;
}
-/*
- * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T
- * object receives a scic_sds_request_frame_handler() request. This method
- * discards the unsolicited frame since we are waiting for the abort task
- * completion. enum sci_status SCI_SUCCESS
- */
-static enum sci_status scic_sds_request_aborting_state_frame_handler(
- struct scic_sds_request *sci_req,
- u32 frame_index)
-{
- /* TODO: Is it even possible to get an unsolicited frame in the aborting state? */
-
- scic_sds_controller_release_frame(
- sci_req->owning_controller, frame_index);
-
- return SCI_SUCCESS;
-}
-
/**
* This method processes the completions transport layer (TL) status to
* determine if the RAW task management frame was sent successfully. If the
@@ -1361,34 +1240,6 @@ static enum sci_status scic_sds_ssp_task_request_await_tc_completion_tc_completi
}
/**
- * This method processes an unsolicited frame while the task mgmt request is
- * waiting for a response frame. It will copy the response data, release
- * the unsolicited frame, and transition the request to the
- * SCI_BASE_REQUEST_STATE_COMPLETED state.
- * @sci_req: This parameter specifies the request for which the
- * unsolicited frame was received.
- * @frame_index: This parameter indicates the unsolicited frame index that
- * should contain the response.
- *
- * This method returns an indication of whether the TC response frame was
- * handled successfully or not. SCI_SUCCESS Currently this value is always
- * returned and indicates successful processing of the TC response. Should
- * probably update to check frame type and make sure it is a response frame.
- */
-static enum sci_status scic_sds_ssp_task_request_await_tc_response_frame_handler(
- struct scic_sds_request *request,
- u32 frame_index)
-{
- scic_sds_io_request_copy_response(request);
-
- sci_base_state_machine_change_state(&request->state_machine,
- SCI_BASE_REQUEST_STATE_COMPLETED);
- scic_sds_controller_release_frame(request->owning_controller,
- frame_index);
- return SCI_SUCCESS;
-}
-
-/**
* This method processes an abnormal TC completion while the SMP request is
* waiting for a response frame. It decides what happened to the IO based
* on TC completion status.
@@ -1450,81 +1301,6 @@ static enum sci_status scic_sds_smp_request_await_response_tc_completion_handler
return SCI_SUCCESS;
}
-/*
- * This function processes an unsolicited frame while the SMP request is waiting
- * for a response frame. It will copy the response data, release the
- * unsolicited frame, and transition the request to the
- * SCI_BASE_REQUEST_STATE_COMPLETED state.
- * @sci_req: This parameter specifies the request for which the
- * unsolicited frame was received.
- * @frame_index: This parameter indicates the unsolicited frame index that
- * should contain the response.
- *
- * This function returns an indication of whether the response frame was handled
- * successfully or not. SCI_SUCCESS Currently this value is always returned and
- * indicates successful processing of the TC response.
- */
-static enum sci_status
-scic_sds_smp_request_await_response_frame_handler(struct scic_sds_request *sci_req,
- u32 frame_index)
-{
- enum sci_status status;
- void *frame_header;
- struct smp_resp *rsp_hdr = &sci_req->smp.rsp;
- ssize_t word_cnt = SMP_RESP_HDR_SZ / sizeof(u32);
-
- status = scic_sds_unsolicited_frame_control_get_header(
- &(scic_sds_request_get_controller(sci_req)->uf_control),
- frame_index,
- &frame_header);
-
- /* byte swap the header. */
- sci_swab32_cpy(rsp_hdr, frame_header, word_cnt);
-
- if (rsp_hdr->frame_type == SMP_RESPONSE) {
- void *smp_resp;
-
- status = scic_sds_unsolicited_frame_control_get_buffer(
- &(scic_sds_request_get_controller(sci_req)->uf_control),
- frame_index,
- &smp_resp);
-
- word_cnt = (sizeof(struct smp_req) - SMP_RESP_HDR_SZ) /
- sizeof(u32);
-
- sci_swab32_cpy(((u8 *) rsp_hdr) + SMP_RESP_HDR_SZ,
- smp_resp, word_cnt);
-
- scic_sds_request_set_status(
- sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS);
-
- sci_base_state_machine_change_state(&sci_req->state_machine,
- SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_TC_COMPLETION);
- } else {
- /* This was not a response frame why did it get forwarded? */
- dev_err(scic_to_dev(sci_req->owning_controller),
- "%s: SCIC SMP Request 0x%p received unexpected frame "
- "%d type 0x%02x\n",
- __func__,
- sci_req,
- frame_index,
- rsp_hdr->frame_type);
-
- scic_sds_request_set_status(
- sci_req,
- SCU_TASK_DONE_SMP_FRM_TYPE_ERR,
- SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR);
-
- sci_base_state_machine_change_state(&sci_req->state_machine,
- SCI_BASE_REQUEST_STATE_COMPLETED);
- }
-
- scic_sds_controller_release_frame(sci_req->owning_controller,
- frame_index);
-
- return SCI_SUCCESS;
-}
-
/**
* This method processes the completions transport layer (TL) status to
* determine if the SMP request was sent successfully. If the SMP request
@@ -1668,76 +1444,6 @@ static enum sci_status scic_sds_stp_request_non_data_await_h2d_tc_completion_han
return SCI_SUCCESS;
}
-/**
- *
- * @request: This parameter specifies the request for which a frame has been
- * received.
- * @frame_index: This parameter specifies the index of the frame that has been
- * received.
- *
- * This method processes frames received from the target while waiting for a
- * device to host register FIS. If a non-register FIS is received during this
- * time, it is treated as a protocol violation from an IO perspective. Indicate
- * if the received frame was processed successfully.
- */
-static enum sci_status scic_sds_stp_request_non_data_await_d2h_frame_handler(
- struct scic_sds_request *sci_req,
- u32 frame_index)
-{
- enum sci_status status;
- struct dev_to_host_fis *frame_header;
- u32 *frame_buffer;
- struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
- struct scic_sds_controller *scic = sci_req->owning_controller;
-
- status = scic_sds_unsolicited_frame_control_get_header(&scic->uf_control,
- frame_index,
- (void **)&frame_header);
-
- if (status != SCI_SUCCESS) {
- dev_err(scic_to_dev(sci_req->owning_controller),
- "%s: SCIC IO Request 0x%p could not get frame header "
- "for frame index %d, status %x\n",
- __func__, stp_req, frame_index, status);
-
- return status;
- }
-
- switch (frame_header->fis_type) {
- case FIS_REGD2H:
- scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control,
- frame_index,
- (void **)&frame_buffer);
-
- scic_sds_controller_copy_sata_response(&sci_req->stp.rsp,
- frame_header,
- frame_buffer);
-
- /* The command has completed with error */
- scic_sds_request_set_status(sci_req, SCU_TASK_DONE_CHECK_RESPONSE,
- SCI_FAILURE_IO_RESPONSE_VALID);
- break;
-
- default:
- dev_warn(scic_to_dev(scic),
- "%s: IO Request:0x%p Frame Id:%d protocol "
- "violation occurred\n", __func__, stp_req,
- frame_index);
-
- scic_sds_request_set_status(sci_req, SCU_TASK_DONE_UNEXP_FIS,
- SCI_FAILURE_PROTOCOL_VIOLATION);
- break;
- }
-
- sci_base_state_machine_change_state(&sci_req->state_machine,
- SCI_BASE_REQUEST_STATE_COMPLETED);
-
- /* Frame has been decoded return it to the controller */
- scic_sds_controller_release_frame(scic, frame_index);
-
- return status;
-}
-
#define SCU_MAX_FRAME_BUFFER_SIZE 0x400 /* 1K is the maximum SCU frame data payload */
/* transmit DATA_FIS from (current sgl + offset) for input
@@ -1952,196 +1658,6 @@ static enum sci_status scic_sds_stp_request_pio_await_h2d_completion_tc_completi
return status;
}
-static enum sci_status scic_sds_stp_request_pio_await_frame_frame_handler(struct scic_sds_request *sci_req,
- u32 frame_index)
-{
- struct scic_sds_controller *scic = sci_req->owning_controller;
- struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
- struct isci_request *ireq = sci_req_to_ireq(sci_req);
- struct sas_task *task = isci_request_access_task(ireq);
- struct dev_to_host_fis *frame_header;
- enum sci_status status;
- u32 *frame_buffer;
-
- status = scic_sds_unsolicited_frame_control_get_header(&scic->uf_control,
- frame_index,
- (void **)&frame_header);
-
- if (status != SCI_SUCCESS) {
- dev_err(scic_to_dev(scic),
- "%s: SCIC IO Request 0x%p could not get frame header "
- "for frame index %d, status %x\n",
- __func__, stp_req, frame_index, status);
- return status;
- }
-
- switch (frame_header->fis_type) {
- case FIS_PIO_SETUP:
- /* Get from the frame buffer the PIO Setup Data */
- scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control,
- frame_index,
- (void **)&frame_buffer);
-
- /* Get the data from the PIO Setup The SCU Hardware returns
- * first word in the frame_header and the rest of the data is in
- * the frame buffer so we need to back up one dword
- */
-
- /* transfer_count: first 16bits in the 4th dword */
- stp_req->type.pio.pio_transfer_bytes = frame_buffer[3] & 0xffff;
-
- /* ending_status: 4th byte in the 3rd dword */
- stp_req->type.pio.ending_status = (frame_buffer[2] >> 24) & 0xff;
-
- scic_sds_controller_copy_sata_response(&sci_req->stp.rsp,
- frame_header,
- frame_buffer);
-
- sci_req->stp.rsp.status = stp_req->type.pio.ending_status;
-
- /* The next state is dependent on whether the
- * request was PIO Data-in or Data out
- */
- if (task->data_dir == DMA_FROM_DEVICE) {
- sci_base_state_machine_change_state(&sci_req->state_machine,
- SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_IN_AWAIT_DATA_SUBSTATE);
- } else if (task->data_dir == DMA_TO_DEVICE) {
- /* Transmit data */
- status = scic_sds_stp_request_pio_data_out_transmit_data(sci_req);
- if (status != SCI_SUCCESS)
- break;
- sci_base_state_machine_change_state(&sci_req->state_machine,
- SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_OUT_TRANSMIT_DATA_SUBSTATE);
- }
- break;
- case FIS_SETDEVBITS:
- sci_base_state_machine_change_state(&sci_req->state_machine,
- SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE);
- break;
- case FIS_REGD2H:
- if (frame_header->status & ATA_BUSY) {
- /* Now why is the drive sending a D2H Register FIS when
- * it is still busy? Do nothing since we are still in
- * the right state.
- */
- dev_dbg(scic_to_dev(scic),
- "%s: SCIC PIO Request 0x%p received "
- "D2H Register FIS with BSY status "
- "0x%x\n", __func__, stp_req,
- frame_header->status);
- break;
- }
-
- scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control,
- frame_index,
- (void **)&frame_buffer);
-
- scic_sds_controller_copy_sata_response(&sci_req->stp.req,
- frame_header,
- frame_buffer);
-
- scic_sds_request_set_status(sci_req,
- SCU_TASK_DONE_CHECK_RESPONSE,
- SCI_FAILURE_IO_RESPONSE_VALID);
-
- sci_base_state_machine_change_state(&sci_req->state_machine,
- SCI_BASE_REQUEST_STATE_COMPLETED);
- break;
- default:
- /* FIXME: what do we do here? */
- break;
- }
-
- /* Frame is decoded return it to the controller */
- scic_sds_controller_release_frame(scic, frame_index);
-
- return status;
-}
-
-static enum sci_status scic_sds_stp_request_pio_data_in_await_data_frame_handler(struct scic_sds_request *sci_req,
- u32 frame_index)
-{
- enum sci_status status;
- struct dev_to_host_fis *frame_header;
- struct sata_fis_data *frame_buffer;
- struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
- struct scic_sds_controller *scic = sci_req->owning_controller;
-
- status = scic_sds_unsolicited_frame_control_get_header(&scic->uf_control,
- frame_index,
- (void **)&frame_header);
-
- if (status != SCI_SUCCESS) {
- dev_err(scic_to_dev(scic),
- "%s: SCIC IO Request 0x%p could not get frame header "
- "for frame index %d, status %x\n",
- __func__, stp_req, frame_index, status);
- return status;
- }
-
- if (frame_header->fis_type == FIS_DATA) {
- if (stp_req->type.pio.request_current.sgl_pair == NULL) {
- sci_req->saved_rx_frame_index = frame_index;
- stp_req->type.pio.pio_transfer_bytes = 0;
- } else {
- scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control,
- frame_index,
- (void **)&frame_buffer);
-
- status = scic_sds_stp_request_pio_data_in_copy_data(stp_req,
- (u8 *)frame_buffer);
-
- /* Frame is decoded return it to the controller */
- scic_sds_controller_release_frame(scic, frame_index);
- }
-
- /* Check for the end of the transfer, are there more
- * bytes remaining for this data transfer
- */
- if (status != SCI_SUCCESS ||
- stp_req->type.pio.pio_transfer_bytes != 0)
- return status;
-
- if ((stp_req->type.pio.ending_status & ATA_BUSY) == 0) {
- scic_sds_request_set_status(sci_req,
- SCU_TASK_DONE_CHECK_RESPONSE,
- SCI_FAILURE_IO_RESPONSE_VALID);
-
- sci_base_state_machine_change_state(&sci_req->state_machine,
- SCI_BASE_REQUEST_STATE_COMPLETED);
- } else {
- sci_base_state_machine_change_state(&sci_req->state_machine,
- SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE);
- }
- } else {
- dev_err(scic_to_dev(scic),
- "%s: SCIC PIO Request 0x%p received frame %d "
- "with fis type 0x%02x when expecting a data "
- "fis.\n", __func__, stp_req, frame_index,
- frame_header->fis_type);
-
- scic_sds_request_set_status(sci_req,
- SCU_TASK_DONE_GOOD,
- SCI_FAILURE_IO_REQUIRES_SCSI_ABORT);
-
- sci_base_state_machine_change_state(&sci_req->state_machine,
- SCI_BASE_REQUEST_STATE_COMPLETED);
-
- /* Frame is decoded return it to the controller */
- scic_sds_controller_release_frame(scic, frame_index);
- }
-
- return status;
-}
-
-
-/**
- *
- * @sci_req:
- * @completion_code:
- *
- * enum sci_status
- */
static enum sci_status scic_sds_stp_request_pio_data_out_await_data_transmit_completion_tc_completion_handler(
struct scic_sds_request *sci_req,
@@ -2280,6 +1796,422 @@ static enum sci_status scic_sds_stp_request_udma_general_frame_handler(struct sc
return status;
}
+enum sci_status scic_sds_io_request_frame_handler(struct scic_sds_request *sci_req,
+ u32 frame_index)
+{
+ struct scic_sds_controller *scic = sci_req->owning_controller;
+ struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
+ enum sci_base_request_states state;
+ enum sci_status status;
+ ssize_t word_cnt;
+
+ state = sci_req->state_machine.current_state_id;
+ switch (state) {
+ case SCI_BASE_REQUEST_STATE_STARTED: {
+ struct ssp_frame_hdr ssp_hdr;
+ void *frame_header;
+
+ scic_sds_unsolicited_frame_control_get_header(&scic->uf_control,
+ frame_index,
+ &frame_header);
+
+ word_cnt = sizeof(struct ssp_frame_hdr) / sizeof(u32);
+ sci_swab32_cpy(&ssp_hdr, frame_header, word_cnt);
+
+ if (ssp_hdr.frame_type == SSP_RESPONSE) {
+ struct ssp_response_iu *resp_iu;
+ ssize_t word_cnt = SSP_RESP_IU_MAX_SIZE / sizeof(u32);
+
+ scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control,
+ frame_index,
+ (void **)&resp_iu);
+
+ sci_swab32_cpy(&sci_req->ssp.rsp, resp_iu, word_cnt);
+
+ resp_iu = &sci_req->ssp.rsp;
+
+ if (resp_iu->datapres == 0x01 ||
+ resp_iu->datapres == 0x02) {
+ scic_sds_request_set_status(sci_req,
+ SCU_TASK_DONE_CHECK_RESPONSE,
+ SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR);
+ } else
+ scic_sds_request_set_status(sci_req,
+ SCU_TASK_DONE_GOOD,
+ SCI_SUCCESS);
+ } else {
+ /* not a response frame, why did it get forwarded? */
+ dev_err(scic_to_dev(scic),
+ "%s: SCIC IO Request 0x%p received unexpected "
+ "frame %d type 0x%02x\n", __func__, sci_req,
+ frame_index, ssp_hdr.frame_type);
+ }
+
+ /*
+ * In any case we are done with this frame buffer return it to the
+ * controller
+ */
+ scic_sds_controller_release_frame(scic, frame_index);
+
+ return SCI_SUCCESS;
+ }
+ case SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE:
+ scic_sds_io_request_copy_response(sci_req);
+ sci_base_state_machine_change_state(&sci_req->state_machine,
+ SCI_BASE_REQUEST_STATE_COMPLETED);
+ scic_sds_controller_release_frame(scic,frame_index);
+ return SCI_SUCCESS;
+ case SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_RESPONSE: {
+ struct smp_resp *rsp_hdr = &sci_req->smp.rsp;
+ void *frame_header;
+
+ scic_sds_unsolicited_frame_control_get_header(&scic->uf_control,
+ frame_index,
+ &frame_header);
+
+ /* byte swap the header. */
+ word_cnt = SMP_RESP_HDR_SZ / sizeof(u32);
+ sci_swab32_cpy(rsp_hdr, frame_header, word_cnt);
+
+ if (rsp_hdr->frame_type == SMP_RESPONSE) {
+ void *smp_resp;
+
+ scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control,
+ frame_index,
+ &smp_resp);
+
+ word_cnt = (sizeof(struct smp_req) - SMP_RESP_HDR_SZ) /
+ sizeof(u32);
+
+ sci_swab32_cpy(((u8 *) rsp_hdr) + SMP_RESP_HDR_SZ,
+ smp_resp, word_cnt);
+
+ scic_sds_request_set_status(sci_req, SCU_TASK_DONE_GOOD,
+ SCI_SUCCESS);
+
+ sci_base_state_machine_change_state(&sci_req->state_machine,
+ SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_TC_COMPLETION);
+ } else {
+ /* This was not a response frame why did it get forwarded? */
+ dev_err(scic_to_dev(scic),
+ "%s: SCIC SMP Request 0x%p received unexpected frame "
+ "%d type 0x%02x\n", __func__, sci_req,
+ frame_index, rsp_hdr->frame_type);
+
+ scic_sds_request_set_status(sci_req,
+ SCU_TASK_DONE_SMP_FRM_TYPE_ERR,
+ SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR);
+
+ sci_base_state_machine_change_state(&sci_req->state_machine,
+ SCI_BASE_REQUEST_STATE_COMPLETED);
+ }
+
+ scic_sds_controller_release_frame(scic, frame_index);
+
+ return SCI_SUCCESS;
+ }
+ case SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_TC_COMPLETION_SUBSTATE:
+ return scic_sds_stp_request_udma_general_frame_handler(sci_req, frame_index);
+ case SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_D2H_REG_FIS_SUBSTATE:
+ /* Use the general frame handler to copy the resposne data */
+ status = scic_sds_stp_request_udma_general_frame_handler(sci_req, frame_index);
+
+ if (status != SCI_SUCCESS)
+ return status;
+
+ scic_sds_stp_request_udma_complete_request(sci_req,
+ SCU_TASK_DONE_CHECK_RESPONSE,
+ SCI_FAILURE_IO_RESPONSE_VALID);
+ return SCI_SUCCESS;
+ case SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_D2H_SUBSTATE: {
+ struct dev_to_host_fis *frame_header;
+ u32 *frame_buffer;
+
+ status = scic_sds_unsolicited_frame_control_get_header(&scic->uf_control,
+ frame_index,
+ (void **)&frame_header);
+
+ if (status != SCI_SUCCESS) {
+ dev_err(scic_to_dev(scic),
+ "%s: SCIC IO Request 0x%p could not get frame header "
+ "for frame index %d, status %x\n",
+ __func__, stp_req, frame_index, status);
+
+ return status;
+ }
+
+ switch (frame_header->fis_type) {
+ case FIS_REGD2H:
+ scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control,
+ frame_index,
+ (void **)&frame_buffer);
+
+ scic_sds_controller_copy_sata_response(&sci_req->stp.rsp,
+ frame_header,
+ frame_buffer);
+
+ /* The command has completed with error */
+ scic_sds_request_set_status(sci_req, SCU_TASK_DONE_CHECK_RESPONSE,
+ SCI_FAILURE_IO_RESPONSE_VALID);
+ break;
+
+ default:
+ dev_warn(scic_to_dev(scic),
+ "%s: IO Request:0x%p Frame Id:%d protocol "
+ "violation occurred\n", __func__, stp_req,
+ frame_index);
+
+ scic_sds_request_set_status(sci_req, SCU_TASK_DONE_UNEXP_FIS,
+ SCI_FAILURE_PROTOCOL_VIOLATION);
+ break;
+ }
+
+ sci_base_state_machine_change_state(&sci_req->state_machine,
+ SCI_BASE_REQUEST_STATE_COMPLETED);
+
+ /* Frame has been decoded return it to the controller */
+ scic_sds_controller_release_frame(scic, frame_index);
+
+ return status;
+ }
+ case SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE: {
+ struct isci_request *ireq = sci_req_to_ireq(sci_req);
+ struct sas_task *task = isci_request_access_task(ireq);
+ struct dev_to_host_fis *frame_header;
+ u32 *frame_buffer;
+
+ status = scic_sds_unsolicited_frame_control_get_header(&scic->uf_control,
+ frame_index,
+ (void **)&frame_header);
+
+ if (status != SCI_SUCCESS) {
+ dev_err(scic_to_dev(scic),
+ "%s: SCIC IO Request 0x%p could not get frame header "
+ "for frame index %d, status %x\n",
+ __func__, stp_req, frame_index, status);
+ return status;
+ }
+
+ switch (frame_header->fis_type) {
+ case FIS_PIO_SETUP:
+ /* Get from the frame buffer the PIO Setup Data */
+ scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control,
+ frame_index,
+ (void **)&frame_buffer);
+
+ /* Get the data from the PIO Setup The SCU Hardware returns
+ * first word in the frame_header and the rest of the data is in
+ * the frame buffer so we need to back up one dword
+ */
+
+ /* transfer_count: first 16bits in the 4th dword */
+ stp_req->type.pio.pio_transfer_bytes = frame_buffer[3] & 0xffff;
+
+ /* ending_status: 4th byte in the 3rd dword */
+ stp_req->type.pio.ending_status = (frame_buffer[2] >> 24) & 0xff;
+
+ scic_sds_controller_copy_sata_response(&sci_req->stp.rsp,
+ frame_header,
+ frame_buffer);
+
+ sci_req->stp.rsp.status = stp_req->type.pio.ending_status;
+
+ /* The next state is dependent on whether the
+ * request was PIO Data-in or Data out
+ */
+ if (task->data_dir == DMA_FROM_DEVICE) {
+ sci_base_state_machine_change_state(&sci_req->state_machine,
+ SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_IN_AWAIT_DATA_SUBSTATE);
+ } else if (task->data_dir == DMA_TO_DEVICE) {
+ /* Transmit data */
+ status = scic_sds_stp_request_pio_data_out_transmit_data(sci_req);
+ if (status != SCI_SUCCESS)
+ break;
+ sci_base_state_machine_change_state(&sci_req->state_machine,
+ SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_OUT_TRANSMIT_DATA_SUBSTATE);
+ }
+ break;
+ case FIS_SETDEVBITS:
+ sci_base_state_machine_change_state(&sci_req->state_machine,
+ SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE);
+ break;
+ case FIS_REGD2H:
+ if (frame_header->status & ATA_BUSY) {
+ /* Now why is the drive sending a D2H Register FIS when
+ * it is still busy? Do nothing since we are still in
+ * the right state.
+ */
+ dev_dbg(scic_to_dev(scic),
+ "%s: SCIC PIO Request 0x%p received "
+ "D2H Register FIS with BSY status "
+ "0x%x\n", __func__, stp_req,
+ frame_header->status);
+ break;
+ }
+
+ scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control,
+ frame_index,
+ (void **)&frame_buffer);
+
+ scic_sds_controller_copy_sata_response(&sci_req->stp.req,
+ frame_header,
+ frame_buffer);
+
+ scic_sds_request_set_status(sci_req,
+ SCU_TASK_DONE_CHECK_RESPONSE,
+ SCI_FAILURE_IO_RESPONSE_VALID);
+
+ sci_base_state_machine_change_state(&sci_req->state_machine,
+ SCI_BASE_REQUEST_STATE_COMPLETED);
+ break;
+ default:
+ /* FIXME: what do we do here? */
+ break;
+ }
+
+ /* Frame is decoded return it to the controller */
+ scic_sds_controller_release_frame(scic, frame_index);
+
+ return status;
+ }
+ case SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_IN_AWAIT_DATA_SUBSTATE: {
+ struct dev_to_host_fis *frame_header;
+ struct sata_fis_data *frame_buffer;
+
+ status = scic_sds_unsolicited_frame_control_get_header(&scic->uf_control,
+ frame_index,
+ (void **)&frame_header);
+
+ if (status != SCI_SUCCESS) {
+ dev_err(scic_to_dev(scic),
+ "%s: SCIC IO Request 0x%p could not get frame header "
+ "for frame index %d, status %x\n",
+ __func__, stp_req, frame_index, status);
+ return status;
+ }
+
+ if (frame_header->fis_type != FIS_DATA) {
+ dev_err(scic_to_dev(scic),
+ "%s: SCIC PIO Request 0x%p received frame %d "
+ "with fis type 0x%02x when expecting a data "
+ "fis.\n", __func__, stp_req, frame_index,
+ frame_header->fis_type);
+
+ scic_sds_request_set_status(sci_req,
+ SCU_TASK_DONE_GOOD,
+ SCI_FAILURE_IO_REQUIRES_SCSI_ABORT);
+
+ sci_base_state_machine_change_state(&sci_req->state_machine,
+ SCI_BASE_REQUEST_STATE_COMPLETED);
+
+ /* Frame is decoded return it to the controller */
+ scic_sds_controller_release_frame(scic, frame_index);
+ return status;
+ }
+
+ if (stp_req->type.pio.request_current.sgl_pair == NULL) {
+ sci_req->saved_rx_frame_index = frame_index;
+ stp_req->type.pio.pio_transfer_bytes = 0;
+ } else {
+ scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control,
+ frame_index,
+ (void **)&frame_buffer);
+
+ status = scic_sds_stp_request_pio_data_in_copy_data(stp_req,
+ (u8 *)frame_buffer);
+
+ /* Frame is decoded return it to the controller */
+ scic_sds_controller_release_frame(scic, frame_index);
+ }
+
+ /* Check for the end of the transfer, are there more
+ * bytes remaining for this data transfer
+ */
+ if (status != SCI_SUCCESS ||
+ stp_req->type.pio.pio_transfer_bytes != 0)
+ return status;
+
+ if ((stp_req->type.pio.ending_status & ATA_BUSY) == 0) {
+ scic_sds_request_set_status(sci_req,
+ SCU_TASK_DONE_CHECK_RESPONSE,
+ SCI_FAILURE_IO_RESPONSE_VALID);
+
+ sci_base_state_machine_change_state(&sci_req->state_machine,
+ SCI_BASE_REQUEST_STATE_COMPLETED);
+ } else {
+ sci_base_state_machine_change_state(&sci_req->state_machine,
+ SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE);
+ }
+ return status;
+ }
+ case SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_D2H_RESPONSE_FRAME_SUBSTATE: {
+ struct dev_to_host_fis *frame_header;
+ u32 *frame_buffer;
+
+ status = scic_sds_unsolicited_frame_control_get_header(&scic->uf_control,
+ frame_index,
+ (void **)&frame_header);
+ if (status != SCI_SUCCESS) {
+ dev_err(scic_to_dev(scic),
+ "%s: SCIC IO Request 0x%p could not get frame header "
+ "for frame index %d, status %x\n",
+ __func__, stp_req, frame_index, status);
+ return status;
+ }
+
+ switch (frame_header->fis_type) {
+ case FIS_REGD2H:
+ scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control,
+ frame_index,
+ (void **)&frame_buffer);
+
+ scic_sds_controller_copy_sata_response(&sci_req->stp.rsp,
+ frame_header,
+ frame_buffer);
+
+ /* The command has completed with error */
+ scic_sds_request_set_status(sci_req,
+ SCU_TASK_DONE_CHECK_RESPONSE,
+ SCI_FAILURE_IO_RESPONSE_VALID);
+ break;
+ default:
+ dev_warn(scic_to_dev(scic),
+ "%s: IO Request:0x%p Frame Id:%d protocol "
+ "violation occurred\n", __func__, stp_req,
+ frame_index);
+
+ scic_sds_request_set_status(sci_req, SCU_TASK_DONE_UNEXP_FIS,
+ SCI_FAILURE_PROTOCOL_VIOLATION);
+ break;
+ }
+
+ sci_base_state_machine_change_state(&sci_req->state_machine,
+ SCI_BASE_REQUEST_STATE_COMPLETED);
+
+ /* Frame has been decoded return it to the controller */
+ scic_sds_controller_release_frame(scic, frame_index);
+
+ return status;
+ }
+ case SCI_BASE_REQUEST_STATE_ABORTING:
+ /* TODO: Is it even possible to get an unsolicited frame in the
+ * aborting state?
+ */
+ scic_sds_controller_release_frame(scic, frame_index);
+ return SCI_SUCCESS;
+ default:
+ dev_warn(scic_to_dev(scic),
+ "%s: SCIC IO Request given unexpected frame %x while in "
+ "state %d\n", __func__, frame_index, state);
+
+ scic_sds_controller_release_frame(scic, frame_index);
+ return SCI_FAILURE_INVALID_STATE;
+ }
+}
+
+
+
+
static enum sci_status scic_sds_stp_request_udma_await_tc_completion_tc_completion_handler(
struct scic_sds_request *sci_req,
u32 completion_code)
@@ -2336,32 +2268,6 @@ static enum sci_status scic_sds_stp_request_udma_await_tc_completion_tc_completi
return status;
}
-static enum sci_status scic_sds_stp_request_udma_await_d2h_reg_fis_frame_handler(
- struct scic_sds_request *sci_req,
- u32 frame_index)
-{
- enum sci_status status;
-
- /* Use the general frame handler to copy the resposne data */
- status = scic_sds_stp_request_udma_general_frame_handler(sci_req, frame_index);
-
- if (status != SCI_SUCCESS)
- return status;
-
- scic_sds_stp_request_udma_complete_request(sci_req,
- SCU_TASK_DONE_CHECK_RESPONSE,
- SCI_FAILURE_IO_RESPONSE_VALID);
-
- return status;
-}
-
-enum sci_status scic_sds_stp_udma_request_construct(struct scic_sds_request *sci_req,
- u32 len,
- enum dma_data_direction dir)
-{
- return SCI_SUCCESS;
-}
-
/**
*
* @sci_req:
@@ -2447,117 +2353,36 @@ static enum sci_status scic_sds_stp_request_soft_reset_await_h2d_diagnostic_tc_c
return SCI_SUCCESS;
}
-/**
- *
- * @request: This parameter specifies the request for which a frame has been
- * received.
- * @frame_index: This parameter specifies the index of the frame that has been
- * received.
- *
- * This method processes frames received from the target while waiting for a
- * device to host register FIS. If a non-register FIS is received during this
- * time, it is treated as a protocol violation from an IO perspective. Indicate
- * if the received frame was processed successfully.
- */
-static enum sci_status scic_sds_stp_request_soft_reset_await_d2h_frame_handler(
- struct scic_sds_request *sci_req,
- u32 frame_index)
-{
- enum sci_status status;
- struct dev_to_host_fis *frame_header;
- u32 *frame_buffer;
- struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
- struct scic_sds_controller *scic = sci_req->owning_controller;
-
- status = scic_sds_unsolicited_frame_control_get_header(&scic->uf_control,
- frame_index,
- (void **)&frame_header);
- if (status != SCI_SUCCESS) {
- dev_err(scic_to_dev(scic),
- "%s: SCIC IO Request 0x%p could not get frame header "
- "for frame index %d, status %x\n",
- __func__, stp_req, frame_index, status);
- return status;
- }
-
- switch (frame_header->fis_type) {
- case FIS_REGD2H:
- scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control,
- frame_index,
- (void **)&frame_buffer);
-
- scic_sds_controller_copy_sata_response(&sci_req->stp.rsp,
- frame_header,
- frame_buffer);
-
- /* The command has completed with error */
- scic_sds_request_set_status(sci_req,
- SCU_TASK_DONE_CHECK_RESPONSE,
- SCI_FAILURE_IO_RESPONSE_VALID);
- break;
-
- default:
- dev_warn(scic_to_dev(scic),
- "%s: IO Request:0x%p Frame Id:%d protocol "
- "violation occurred\n", __func__, stp_req,
- frame_index);
-
- scic_sds_request_set_status(sci_req, SCU_TASK_DONE_UNEXP_FIS,
- SCI_FAILURE_PROTOCOL_VIOLATION);
- break;
- }
-
- sci_base_state_machine_change_state(&sci_req->state_machine,
- SCI_BASE_REQUEST_STATE_COMPLETED);
-
- /* Frame has been decoded return it to the controller */
- scic_sds_controller_release_frame(scic, frame_index);
-
- return status;
-}
-
static const struct scic_sds_io_request_state_handler scic_sds_request_state_handler_table[] = {
[SCI_BASE_REQUEST_STATE_INITIAL] = {},
[SCI_BASE_REQUEST_STATE_CONSTRUCTED] = {},
[SCI_BASE_REQUEST_STATE_STARTED] = {
.tc_completion_handler = scic_sds_request_started_state_tc_completion_handler,
- .frame_handler = scic_sds_request_started_state_frame_handler,
},
[SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_COMPLETION] = {
.tc_completion_handler = scic_sds_ssp_task_request_await_tc_completion_tc_completion_handler,
},
- [SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE] = {
- .frame_handler = scic_sds_ssp_task_request_await_tc_response_frame_handler,
- },
+ [SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE] = { },
[SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_RESPONSE] = {
.tc_completion_handler = scic_sds_smp_request_await_response_tc_completion_handler,
- .frame_handler = scic_sds_smp_request_await_response_frame_handler,
},
[SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_TC_COMPLETION] = {
.tc_completion_handler = scic_sds_smp_request_await_tc_completion_tc_completion_handler,
},
[SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_TC_COMPLETION_SUBSTATE] = {
.tc_completion_handler = scic_sds_stp_request_udma_await_tc_completion_tc_completion_handler,
- .frame_handler = scic_sds_stp_request_udma_general_frame_handler,
- },
- [SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_D2H_REG_FIS_SUBSTATE] = {
- .frame_handler = scic_sds_stp_request_udma_await_d2h_reg_fis_frame_handler,
},
+ [SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_D2H_REG_FIS_SUBSTATE] = { },
[SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_H2D_COMPLETION_SUBSTATE] = {
.tc_completion_handler = scic_sds_stp_request_non_data_await_h2d_tc_completion_handler,
},
- [SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_D2H_SUBSTATE] = {
- .frame_handler = scic_sds_stp_request_non_data_await_d2h_frame_handler,
- },
+ [SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_D2H_SUBSTATE] = { },
[SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_H2D_COMPLETION_SUBSTATE] = {
.tc_completion_handler = scic_sds_stp_request_pio_await_h2d_completion_tc_completion_handler,
},
- [SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE] = {
- .frame_handler = scic_sds_stp_request_pio_await_frame_frame_handler
- },
+ [SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE] = { },
[SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_IN_AWAIT_DATA_SUBSTATE] = {
.event_handler = scic_sds_stp_request_pio_data_in_await_data_event_handler,
- .frame_handler = scic_sds_stp_request_pio_data_in_await_data_frame_handler
},
[SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_OUT_TRANSMIT_DATA_SUBSTATE] = {
.tc_completion_handler = scic_sds_stp_request_pio_data_out_await_data_transmit_completion_tc_completion_handler,
@@ -2568,15 +2393,12 @@ static const struct scic_sds_io_request_state_handler scic_sds_request_state_han
[SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_DIAGNOSTIC_COMPLETION_SUBSTATE] = {
.tc_completion_handler = scic_sds_stp_request_soft_reset_await_h2d_diagnostic_tc_completion_handler,
},
- [SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_D2H_RESPONSE_FRAME_SUBSTATE] = {
- .frame_handler = scic_sds_stp_request_soft_reset_await_d2h_frame_handler,
- },
+ [SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_D2H_RESPONSE_FRAME_SUBSTATE] = { },
[SCI_BASE_REQUEST_STATE_COMPLETED] = {
.complete_handler = scic_sds_request_completed_state_complete_handler,
},
[SCI_BASE_REQUEST_STATE_ABORTING] = {
.tc_completion_handler = scic_sds_request_aborting_state_tc_completion_handler,
- .frame_handler = scic_sds_request_aborting_state_frame_handler,
},
[SCI_BASE_REQUEST_STATE_FINAL] = { },
};

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