*/
#include "isci.h"
-#include "scic_io_request.h"
-#include "scic_task_request.h"
-#include "scic_port.h"
#include "task.h"
#include "request.h"
#include "sata.h"
#include "scu_completion_codes.h"
-#include "scic_sds_request.h"
#include "sas.h"
-static enum sci_status isci_request_ssp_request_construct(
- struct isci_request *request)
-{
- enum sci_status status;
+/**
+ * This method returns the sgl element pair for the specificed sgl_pair index.
+ * @sci_req: This parameter specifies the IO request for which to retrieve
+ * the Scatter-Gather List element pair.
+ * @sgl_pair_index: This parameter specifies the index into the SGL element
+ * pair to be retrieved.
+ *
+ * This method returns a pointer to an struct scu_sgl_element_pair.
+ */
+static struct scu_sgl_element_pair *scic_sds_request_get_sgl_element_pair(
+ struct scic_sds_request *sci_req,
+ u32 sgl_pair_index
+ ) {
+ struct scu_task_context *task_context;
+
+ task_context = (struct scu_task_context *)sci_req->task_context_buffer;
+
+ if (sgl_pair_index == 0) {
+ return &task_context->sgl_pair_ab;
+ } else if (sgl_pair_index == 1) {
+ return &task_context->sgl_pair_cd;
+ }
- dev_dbg(&request->isci_host->pdev->dev,
- "%s: request = %p\n",
- __func__,
- request);
- status = scic_io_request_construct_basic_ssp(
- request->sci_request_handle
- );
- return status;
+ return &sci_req->sg_table[sgl_pair_index - 2];
}
-static enum sci_status isci_request_stp_request_construct(
- struct isci_request *request)
+/**
+ * This function will build the SGL list for an IO request.
+ * @sci_req: This parameter specifies the IO request for which to build
+ * the Scatter-Gather List.
+ *
+ */
+void scic_sds_request_build_sgl(struct scic_sds_request *sds_request)
{
- struct sas_task *task = isci_request_access_task(request);
- enum sci_status status;
- struct host_to_dev_fis *register_fis;
-
- dev_dbg(&request->isci_host->pdev->dev,
- "%s: request = %p\n",
- __func__,
- request);
+ struct isci_request *isci_request = sci_req_to_ireq(sds_request);
+ struct isci_host *isci_host = isci_request->isci_host;
+ struct sas_task *task = isci_request_access_task(isci_request);
+ struct scatterlist *sg = NULL;
+ dma_addr_t dma_addr;
+ u32 sg_idx = 0;
+ struct scu_sgl_element_pair *scu_sg = NULL;
+ struct scu_sgl_element_pair *prev_sg = NULL;
+
+ if (task->num_scatter > 0) {
+ sg = task->scatter;
+
+ while (sg) {
+ scu_sg = scic_sds_request_get_sgl_element_pair(
+ sds_request,
+ sg_idx);
+
+ SCU_SGL_COPY(scu_sg->A, sg);
+
+ sg = sg_next(sg);
+
+ if (sg) {
+ SCU_SGL_COPY(scu_sg->B, sg);
+ sg = sg_next(sg);
+ } else
+ SCU_SGL_ZERO(scu_sg->B);
+
+ if (prev_sg) {
+ dma_addr =
+ scic_io_request_get_dma_addr(
+ sds_request,
+ scu_sg);
+
+ prev_sg->next_pair_upper =
+ upper_32_bits(dma_addr);
+ prev_sg->next_pair_lower =
+ lower_32_bits(dma_addr);
+ }
- /* Get the host_to_dev_fis from the core and copy
- * the fis from the task into it.
- */
- register_fis = isci_sata_task_to_fis_copy(task);
+ prev_sg = scu_sg;
+ sg_idx++;
+ }
+ } else { /* handle when no sg */
+ scu_sg = scic_sds_request_get_sgl_element_pair(sds_request,
+ sg_idx);
- status = scic_io_request_construct_basic_sata(
- request->sci_request_handle
- );
+ dma_addr = dma_map_single(&isci_host->pdev->dev,
+ task->scatter,
+ task->total_xfer_len,
+ task->data_dir);
- /* Set the ncq tag in the fis, from the queue
- * command in the task.
- */
- if (isci_sata_is_task_ncq(task)) {
+ isci_request->zero_scatter_daddr = dma_addr;
- isci_sata_set_ncq_tag(
- register_fis,
- task
- );
+ scu_sg->A.length = task->total_xfer_len;
+ scu_sg->A.address_upper = upper_32_bits(dma_addr);
+ scu_sg->A.address_lower = lower_32_bits(dma_addr);
}
- return status;
+ if (scu_sg) {
+ scu_sg->next_pair_upper = 0;
+ scu_sg->next_pair_lower = 0;
+ }
}
-/*
- * isci_smp_request_build() - This function builds the smp request.
- * @ireq: This parameter points to the isci_request allocated in the
- * request construct function.
- *
- * SCI_SUCCESS on successfull completion, or specific failure code.
- */
-static enum sci_status isci_smp_request_build(struct isci_request *ireq)
+static void scic_sds_io_request_build_ssp_command_iu(struct scic_sds_request *sci_req)
{
- enum sci_status status = SCI_FAILURE;
+ struct ssp_cmd_iu *cmd_iu;
+ struct isci_request *ireq = sci_req_to_ireq(sci_req);
struct sas_task *task = isci_request_access_task(ireq);
- struct scic_sds_request *sci_req = ireq->sci_request_handle;
- void *cmd_iu = sci_req->command_buffer;
- dev_dbg(&ireq->isci_host->pdev->dev,
- "%s: request = %p\n", __func__, ireq);
+ cmd_iu = &sci_req->ssp.cmd;
- dev_dbg(&ireq->isci_host->pdev->dev,
- "%s: smp_req len = %d\n",
- __func__,
- task->smp_task.smp_req.length);
+ memcpy(cmd_iu->LUN, task->ssp_task.LUN, 8);
+ cmd_iu->add_cdb_len = 0;
+ cmd_iu->_r_a = 0;
+ cmd_iu->_r_b = 0;
+ cmd_iu->en_fburst = 0; /* unsupported */
+ cmd_iu->task_prio = task->ssp_task.task_prio;
+ cmd_iu->task_attr = task->ssp_task.task_attr;
+ cmd_iu->_r_c = 0;
- /* copy the smp_command to the address; */
- sg_copy_to_buffer(&task->smp_task.smp_req, 1,
- (char *)cmd_iu,
- sizeof(struct smp_req));
+ sci_swab32_cpy(&cmd_iu->cdb, task->ssp_task.cdb,
+ sizeof(task->ssp_task.cdb) / sizeof(u32));
+}
- status = scic_io_request_construct_smp(sci_req);
- if (status != SCI_SUCCESS)
- dev_warn(&ireq->isci_host->pdev->dev,
- "%s: failed with status = %d\n",
- __func__,
- status);
+static void scic_sds_task_request_build_ssp_task_iu(struct scic_sds_request *sci_req)
+{
+ struct ssp_task_iu *task_iu;
+ struct isci_request *ireq = sci_req_to_ireq(sci_req);
+ struct sas_task *task = isci_request_access_task(ireq);
+ struct isci_tmf *isci_tmf = isci_request_access_tmf(ireq);
- return status;
+ task_iu = &sci_req->ssp.tmf;
+
+ memset(task_iu, 0, sizeof(struct ssp_task_iu));
+
+ memcpy(task_iu->LUN, task->ssp_task.LUN, 8);
+
+ task_iu->task_func = isci_tmf->tmf_code;
+ task_iu->task_tag =
+ (ireq->ttype == tmf_task) ?
+ isci_tmf->io_tag :
+ SCI_CONTROLLER_INVALID_IO_TAG;
}
/**
- * isci_io_request_build() - This function builds the io request object.
- * @isci_host: This parameter specifies the ISCI host object
- * @request: This parameter points to the isci_request object allocated in the
- * request construct function.
- * @sci_device: This parameter is the handle for the sci core's remote device
- * object that is the destination for this request.
+ * This method is will fill in the SCU Task Context for any type of SSP request.
+ * @sci_req:
+ * @task_context:
*
- * SCI_SUCCESS on successfull completion, or specific failure code.
*/
-static enum sci_status isci_io_request_build(
- struct isci_host *isci_host,
- struct isci_request *request,
- struct isci_remote_device *isci_device)
+static void scu_ssp_reqeust_construct_task_context(
+ struct scic_sds_request *sds_request,
+ struct scu_task_context *task_context)
{
- enum sci_status status = SCI_SUCCESS;
- struct sas_task *task = isci_request_access_task(request);
- struct scic_sds_remote_device *sci_device = &isci_device->sci;
+ dma_addr_t dma_addr;
+ struct scic_sds_controller *controller;
+ struct scic_sds_remote_device *target_device;
+ struct scic_sds_port *target_port;
+
+ controller = scic_sds_request_get_controller(sds_request);
+ target_device = scic_sds_request_get_device(sds_request);
+ target_port = scic_sds_request_get_port(sds_request);
+
+ /* Fill in the TC with the its required data */
+ task_context->abort = 0;
+ task_context->priority = 0;
+ task_context->initiator_request = 1;
+ task_context->connection_rate = target_device->connection_rate;
+ task_context->protocol_engine_index =
+ scic_sds_controller_get_protocol_engine_group(controller);
+ task_context->logical_port_index =
+ scic_sds_port_get_index(target_port);
+ task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_SSP;
+ task_context->valid = SCU_TASK_CONTEXT_VALID;
+ task_context->context_type = SCU_TASK_CONTEXT_TYPE;
+
+ task_context->remote_node_index =
+ scic_sds_remote_device_get_index(sds_request->target_device);
+ task_context->command_code = 0;
+
+ task_context->link_layer_control = 0;
+ task_context->do_not_dma_ssp_good_response = 1;
+ task_context->strict_ordering = 0;
+ task_context->control_frame = 0;
+ task_context->timeout_enable = 0;
+ task_context->block_guard_enable = 0;
+
+ task_context->address_modifier = 0;
+
+ /* task_context->type.ssp.tag = sci_req->io_tag; */
+ task_context->task_phase = 0x01;
+
+ if (sds_request->was_tag_assigned_by_user) {
+ /*
+ * Build the task context now since we have already read
+ * the data
+ */
+ sds_request->post_context =
+ (SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
+ (scic_sds_controller_get_protocol_engine_group(
+ controller) <<
+ SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) |
+ (scic_sds_port_get_index(target_port) <<
+ SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) |
+ scic_sds_io_tag_get_index(sds_request->io_tag));
+ } else {
+ /*
+ * Build the task context now since we have already read
+ * the data
+ *
+ * I/O tag index is not assigned because we have to wait
+ * until we get a TCi
+ */
+ sds_request->post_context =
+ (SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
+ (scic_sds_controller_get_protocol_engine_group(
+ owning_controller) <<
+ SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) |
+ (scic_sds_port_get_index(target_port) <<
+ SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT));
+ }
- dev_dbg(&isci_host->pdev->dev,
- "%s: isci_device = 0x%p; request = %p, "
- "num_scatter = %d\n",
- __func__,
- isci_device,
- request,
- task->num_scatter);
+ /*
+ * Copy the physical address for the command buffer to the
+ * SCU Task Context
+ */
+ dma_addr = scic_io_request_get_dma_addr(sds_request,
+ &sds_request->ssp.cmd);
- /* map the sgl addresses, if present.
- * libata does the mapping for sata devices
- * before we get the request.
+ task_context->command_iu_upper = upper_32_bits(dma_addr);
+ task_context->command_iu_lower = lower_32_bits(dma_addr);
+
+ /*
+ * Copy the physical address for the response buffer to the
+ * SCU Task Context
*/
- if (task->num_scatter &&
- !sas_protocol_ata(task->task_proto) &&
- !(SAS_PROTOCOL_SMP & task->task_proto)) {
+ dma_addr = scic_io_request_get_dma_addr(sds_request,
+ &sds_request->ssp.rsp);
- request->num_sg_entries = dma_map_sg(
- &isci_host->pdev->dev,
- task->scatter,
- task->num_scatter,
- task->data_dir
- );
+ task_context->response_iu_upper = upper_32_bits(dma_addr);
+ task_context->response_iu_lower = lower_32_bits(dma_addr);
+}
- if (request->num_sg_entries == 0)
- return SCI_FAILURE_INSUFFICIENT_RESOURCES;
- }
+/**
+ * This method is will fill in the SCU Task Context for a SSP IO request.
+ * @sci_req:
+ *
+ */
+static void scu_ssp_io_request_construct_task_context(
+ struct scic_sds_request *sci_req,
+ enum dma_data_direction dir,
+ u32 len)
+{
+ struct scu_task_context *task_context;
- /* build the common request object. For now,
- * we will let the core allocate the IO tag.
- */
- status = scic_io_request_construct(
- isci_host->core_controller,
- sci_device,
- SCI_CONTROLLER_INVALID_IO_TAG,
- request,
- request->sci_request_mem_ptr,
- (struct scic_sds_request **)&request->sci_request_handle
- );
+ task_context = scic_sds_request_get_task_context(sci_req);
- if (status != SCI_SUCCESS) {
- dev_warn(&isci_host->pdev->dev,
- "%s: failed request construct\n",
- __func__);
- return SCI_FAILURE;
- }
+ scu_ssp_reqeust_construct_task_context(sci_req, task_context);
- request->sci_request_handle->ireq = request;
+ task_context->ssp_command_iu_length =
+ sizeof(struct ssp_cmd_iu) / sizeof(u32);
+ task_context->type.ssp.frame_type = SSP_COMMAND;
- switch (task->task_proto) {
- case SAS_PROTOCOL_SMP:
- status = isci_smp_request_build(request);
- break;
- case SAS_PROTOCOL_SSP:
- status = isci_request_ssp_request_construct(request);
+ switch (dir) {
+ case DMA_FROM_DEVICE:
+ case DMA_NONE:
+ default:
+ task_context->task_type = SCU_TASK_TYPE_IOREAD;
break;
- case SAS_PROTOCOL_SATA:
- case SAS_PROTOCOL_STP:
- case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
- status = isci_request_stp_request_construct(request);
+ case DMA_TO_DEVICE:
+ task_context->task_type = SCU_TASK_TYPE_IOWRITE;
break;
- default:
- dev_warn(&isci_host->pdev->dev,
- "%s: unknown protocol\n", __func__);
- return SCI_FAILURE;
}
- return SCI_SUCCESS;
+ task_context->transfer_length_bytes = len;
+
+ if (task_context->transfer_length_bytes > 0)
+ scic_sds_request_build_sgl(sci_req);
+}
+
+/**
+ * This method will fill in the SCU Task Context for a SSP Task request. The
+ * following important settings are utilized: -# priority ==
+ * SCU_TASK_PRIORITY_HIGH. This ensures that the task request is issued
+ * ahead of other task destined for the same Remote Node. -# task_type ==
+ * SCU_TASK_TYPE_IOREAD. This simply indicates that a normal request type
+ * (i.e. non-raw frame) is being utilized to perform task management. -#
+ * control_frame == 1. This ensures that the proper endianess is set so
+ * that the bytes are transmitted in the right order for a task frame.
+ * @sci_req: This parameter specifies the task request object being
+ * constructed.
+ *
+ */
+static void scu_ssp_task_request_construct_task_context(
+ struct scic_sds_request *sci_req)
+{
+ struct scu_task_context *task_context;
+
+ task_context = scic_sds_request_get_task_context(sci_req);
+
+ scu_ssp_reqeust_construct_task_context(sci_req, task_context);
+
+ task_context->control_frame = 1;
+ task_context->priority = SCU_TASK_PRIORITY_HIGH;
+ task_context->task_type = SCU_TASK_TYPE_RAW_FRAME;
+ task_context->transfer_length_bytes = 0;
+ task_context->type.ssp.frame_type = SSP_TASK;
+ task_context->ssp_command_iu_length =
+ sizeof(struct ssp_task_iu) / sizeof(u32);
}
/**
- * isci_request_alloc_core() - This function gets the request object from the
- * isci_host dma cache.
- * @isci_host: This parameter specifies the ISCI host object
- * @isci_request: This parameter will contain the pointer to the new
- * isci_request object.
- * @isci_device: This parameter is the pointer to the isci remote device object
- * that is the destination for this request.
- * @gfp_flags: This parameter specifies the os allocation flags.
+ * This method constructs the SSP Command IU data for this ssp passthrough
+ * comand request object.
+ * @sci_req: This parameter specifies the request object for which the SSP
+ * command information unit is being built.
*
- * SCI_SUCCESS on successfull completion, or specific failure code.
+ * enum sci_status, returns invalid parameter is cdb > 16
*/
-static int isci_request_alloc_core(
- struct isci_host *isci_host,
- struct isci_request **isci_request,
- struct isci_remote_device *isci_device,
- gfp_t gfp_flags)
+
+
+/**
+ * This method constructs the SATA request object.
+ * @sci_req:
+ * @sat_protocol:
+ * @transfer_length:
+ * @data_direction:
+ * @copy_rx_frame:
+ *
+ * enum sci_status
+ */
+static enum sci_status
+scic_io_request_construct_sata(struct scic_sds_request *sci_req,
+ u32 len,
+ enum dma_data_direction dir,
+ bool copy)
{
- int ret = 0;
- dma_addr_t handle;
- struct isci_request *request;
+ enum sci_status status = SCI_SUCCESS;
+ struct isci_request *ireq = sci_req_to_ireq(sci_req);
+ struct sas_task *task = isci_request_access_task(ireq);
+ /* check for management protocols */
+ if (ireq->ttype == tmf_task) {
+ struct isci_tmf *tmf = isci_request_access_tmf(ireq);
- /* get pointer to dma memory. This actually points
- * to both the isci_remote_device object and the
- * sci object. The isci object is at the beginning
- * of the memory allocated here.
- */
- request = dma_pool_alloc(isci_host->dma_pool, gfp_flags, &handle);
- if (!request) {
- dev_warn(&isci_host->pdev->dev,
- "%s: dma_pool_alloc returned NULL\n", __func__);
- return -ENOMEM;
+ if (tmf->tmf_code == isci_tmf_sata_srst_high ||
+ tmf->tmf_code == isci_tmf_sata_srst_low)
+ return scic_sds_stp_soft_reset_request_construct(sci_req);
+ else {
+ dev_err(scic_to_dev(sci_req->owning_controller),
+ "%s: Request 0x%p received un-handled SAT "
+ "management protocol 0x%x.\n",
+ __func__, sci_req, tmf->tmf_code);
+
+ return SCI_FAILURE;
+ }
}
- /* initialize the request object. */
- spin_lock_init(&request->state_lock);
- request->sci_request_mem_ptr = ((u8 *)request) +
- sizeof(struct isci_request);
- request->request_daddr = handle;
- request->isci_host = isci_host;
- request->isci_device = isci_device;
- request->io_request_completion = NULL;
+ if (!sas_protocol_ata(task->task_proto)) {
+ dev_err(scic_to_dev(sci_req->owning_controller),
+ "%s: Non-ATA protocol in SATA path: 0x%x\n",
+ __func__,
+ task->task_proto);
+ return SCI_FAILURE;
- request->request_alloc_size = isci_host->dma_pool_alloc_size;
- request->num_sg_entries = 0;
+ }
- request->complete_in_target = false;
+ /* non data */
+ if (task->data_dir == DMA_NONE)
+ return scic_sds_stp_non_data_request_construct(sci_req);
- INIT_LIST_HEAD(&request->completed_node);
- INIT_LIST_HEAD(&request->dev_node);
+ /* NCQ */
+ if (task->ata_task.use_ncq)
+ return scic_sds_stp_ncq_request_construct(sci_req, len, dir);
- *isci_request = request;
- isci_request_change_state(request, allocated);
+ /* DMA */
+ if (task->ata_task.dma_xfer)
+ return scic_sds_stp_udma_request_construct(sci_req, len, dir);
+ else /* PIO */
+ return scic_sds_stp_pio_request_construct(sci_req, copy);
- return ret;
+ return status;
}
-static int isci_request_alloc_io(
- struct isci_host *isci_host,
- struct sas_task *task,
- struct isci_request **isci_request,
- struct isci_remote_device *isci_device,
- gfp_t gfp_flags)
+static enum sci_status scic_io_request_construct_basic_ssp(struct scic_sds_request *sci_req)
{
- int retval = isci_request_alloc_core(isci_host, isci_request,
- isci_device, gfp_flags);
+ struct isci_request *ireq = sci_req_to_ireq(sci_req);
+ struct sas_task *task = isci_request_access_task(ireq);
- if (!retval) {
- (*isci_request)->ttype_ptr.io_task_ptr = task;
- (*isci_request)->ttype = io_task;
+ sci_req->protocol = SCIC_SSP_PROTOCOL;
- task->lldd_task = *isci_request;
- }
- return retval;
+ scu_ssp_io_request_construct_task_context(sci_req,
+ task->data_dir,
+ task->total_xfer_len);
+
+ scic_sds_io_request_build_ssp_command_iu(sci_req);
+
+ sci_base_state_machine_change_state(
+ &sci_req->state_machine,
+ SCI_BASE_REQUEST_STATE_CONSTRUCTED);
+
+ return SCI_SUCCESS;
}
-/**
- * isci_request_alloc_tmf() - This function gets the request object from the
- * isci_host dma cache and initializes the relevant fields as a sas_task.
- * @isci_host: This parameter specifies the ISCI host object
- * @sas_task: This parameter is the task struct from the upper layer driver.
- * @isci_request: This parameter will contain the pointer to the new
- * isci_request object.
- * @isci_device: This parameter is the pointer to the isci remote device object
- * that is the destination for this request.
- * @gfp_flags: This parameter specifies the os allocation flags.
- *
- * SCI_SUCCESS on successfull completion, or specific failure code.
- */
-int isci_request_alloc_tmf(
- struct isci_host *isci_host,
- struct isci_tmf *isci_tmf,
- struct isci_request **isci_request,
- struct isci_remote_device *isci_device,
- gfp_t gfp_flags)
+enum sci_status scic_task_request_construct_ssp(
+ struct scic_sds_request *sci_req)
{
- int retval = isci_request_alloc_core(isci_host, isci_request,
- isci_device, gfp_flags);
+ /* Construct the SSP Task SCU Task Context */
+ scu_ssp_task_request_construct_task_context(sci_req);
- if (!retval) {
+ /* Fill in the SSP Task IU */
+ scic_sds_task_request_build_ssp_task_iu(sci_req);
- (*isci_request)->ttype_ptr.tmf_task_ptr = isci_tmf;
- (*isci_request)->ttype = tmf_task;
- }
- return retval;
+ sci_base_state_machine_change_state(&sci_req->state_machine,
+ SCI_BASE_REQUEST_STATE_CONSTRUCTED);
+
+ return SCI_SUCCESS;
}
-/**
- * isci_request_execute() - This function allocates the isci_request object,
- * all fills in some common fields.
- * @isci_host: This parameter specifies the ISCI host object
- * @sas_task: This parameter is the task struct from the upper layer driver.
- * @isci_request: This parameter will contain the pointer to the new
- * isci_request object.
- * @gfp_flags: This parameter specifies the os allocation flags.
- *
- * SCI_SUCCESS on successfull completion, or specific failure code.
- */
-int isci_request_execute(
- struct isci_host *isci_host,
- struct sas_task *task,
- struct isci_request **isci_request,
- gfp_t gfp_flags)
+
+static enum sci_status scic_io_request_construct_basic_sata(struct scic_sds_request *sci_req)
{
- int ret = 0;
- struct scic_sds_remote_device *sci_device;
- enum sci_status status = SCI_FAILURE_UNSUPPORTED_PROTOCOL;
- struct isci_remote_device *isci_device;
- struct isci_request *request;
- unsigned long flags;
+ enum sci_status status;
+ struct scic_sds_stp_request *stp_req;
+ bool copy = false;
+ struct isci_request *isci_request = sci_req_to_ireq(sci_req);
+ struct sas_task *task = isci_request_access_task(isci_request);
- isci_device = task->dev->lldd_dev;
- sci_device = &isci_device->sci;
+ stp_req = &sci_req->stp.req;
+ sci_req->protocol = SCIC_STP_PROTOCOL;
- /* do common allocation and init of request object. */
- ret = isci_request_alloc_io(
- isci_host,
- task,
- &request,
- isci_device,
- gfp_flags
- );
+ copy = (task->data_dir == DMA_NONE) ? false : true;
- if (ret)
- goto out;
+ status = scic_io_request_construct_sata(sci_req,
+ task->total_xfer_len,
+ task->data_dir,
+ copy);
- status = isci_io_request_build(isci_host, request, isci_device);
- if (status == SCI_SUCCESS) {
+ if (status == SCI_SUCCESS)
+ sci_base_state_machine_change_state(&sci_req->state_machine,
+ SCI_BASE_REQUEST_STATE_CONSTRUCTED);
- spin_lock_irqsave(&isci_host->scic_lock, flags);
+ return status;
+}
- /* send the request, let the core assign the IO TAG. */
- status = scic_controller_start_io(
- isci_host->core_controller,
- sci_device,
- request->sci_request_handle,
- SCI_CONTROLLER_INVALID_IO_TAG
- );
- if (status == SCI_SUCCESS ||
- status == SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED) {
+enum sci_status scic_task_request_construct_sata(struct scic_sds_request *sci_req)
+{
+ enum sci_status status = SCI_SUCCESS;
+ struct isci_request *ireq = sci_req_to_ireq(sci_req);
- /* Either I/O started OK, or the core has signaled that
- * the device needs a target reset.
- *
- * In either case, hold onto the I/O for later.
- *
- * Update it's status and add it to the list in the
- * remote device object.
- */
- isci_request_change_state(request, started);
- list_add(&request->dev_node,
- &isci_device->reqs_in_process);
-
- if (status == SCI_SUCCESS) {
- /* Save the tag for possible task mgmt later. */
- request->io_tag = scic_io_request_get_io_tag(
- request->sci_request_handle);
- } else {
- /* The request did not really start in the
- * hardware, so clear the request handle
- * here so no terminations will be done.
- */
- request->sci_request_handle = NULL;
- }
+ /* check for management protocols */
+ if (ireq->ttype == tmf_task) {
+ struct isci_tmf *tmf = isci_request_access_tmf(ireq);
- } else
- dev_warn(&isci_host->pdev->dev,
- "%s: failed request start (0x%x)\n",
- __func__, status);
+ if (tmf->tmf_code == isci_tmf_sata_srst_high ||
+ tmf->tmf_code == isci_tmf_sata_srst_low) {
+ status = scic_sds_stp_soft_reset_request_construct(sci_req);
+ } else {
+ dev_err(scic_to_dev(sci_req->owning_controller),
+ "%s: Request 0x%p received un-handled SAT "
+ "Protocol 0x%x.\n",
+ __func__, sci_req, tmf->tmf_code);
- spin_unlock_irqrestore(&isci_host->scic_lock, flags);
+ return SCI_FAILURE;
+ }
+ }
- if (status ==
- SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED) {
- /* Signal libsas that we need the SCSI error
- * handler thread to work on this I/O and that
- * we want a device reset.
- */
- spin_lock_irqsave(&task->task_state_lock, flags);
- task->task_state_flags |= SAS_TASK_NEED_DEV_RESET;
- spin_unlock_irqrestore(&task->task_state_lock, flags);
+ if (status == SCI_SUCCESS)
+ sci_base_state_machine_change_state(
+ &sci_req->state_machine,
+ SCI_BASE_REQUEST_STATE_CONSTRUCTED);
- /* Cause this task to be scheduled in the SCSI error
- * handler thread.
- */
- isci_execpath_callback(isci_host, task,
- sas_task_abort);
+ return status;
+}
- /* Change the status, since we are holding
- * the I/O until it is managed by the SCSI
- * error handler.
- */
- status = SCI_SUCCESS;
- }
+/**
+ * sci_req_tx_bytes - bytes transferred when reply underruns request
+ * @sci_req: request that was terminated early
+ */
+#define SCU_TASK_CONTEXT_SRAM 0x200000
+static u32 sci_req_tx_bytes(struct scic_sds_request *sci_req)
+{
+ struct scic_sds_controller *scic = sci_req->owning_controller;
+ u32 ret_val = 0;
- } else
- dev_warn(&isci_host->pdev->dev,
- "%s: request_construct failed - status = 0x%x\n",
- __func__,
- status);
+ if (readl(&scic->smu_registers->address_modifier) == 0) {
+ void __iomem *scu_reg_base = scic->scu_registers;
- out:
- if (status != SCI_SUCCESS) {
- /* release dma memory on failure. */
- isci_request_free(isci_host, request);
- request = NULL;
- ret = SCI_FAILURE;
+ /* get the bytes of data from the Address == BAR1 + 20002Ch + (256*TCi) where
+ * BAR1 is the scu_registers
+ * 0x20002C = 0x200000 + 0x2c
+ * = start of task context SRAM + offset of (type.ssp.data_offset)
+ * TCi is the io_tag of struct scic_sds_request
+ */
+ ret_val = readl(scu_reg_base +
+ (SCU_TASK_CONTEXT_SRAM + offsetof(struct scu_task_context, type.ssp.data_offset)) +
+ ((sizeof(struct scu_task_context)) * scic_sds_io_tag_get_index(sci_req->io_tag)));
}
- *isci_request = request;
- return ret;
+ return ret_val;
}
+enum sci_status
+scic_sds_request_start(struct scic_sds_request *request)
+{
+ if (request->device_sequence !=
+ scic_sds_remote_device_get_sequence(request->target_device))
+ return SCI_FAILURE;
-/**
- * isci_request_process_response_iu() - This function sets the status and
- * response iu, in the task struct, from the request object for the upper
- * layer driver.
- * @sas_task: This parameter is the task struct from the upper layer driver.
- * @resp_iu: This parameter points to the response iu of the completed request.
- * @dev: This parameter specifies the linux device struct.
- *
- * none.
- */
-static void isci_request_process_response_iu(
- struct sas_task *task,
- struct ssp_response_iu *resp_iu,
- struct device *dev)
+ if (request->state_handlers->start_handler)
+ return request->state_handlers->start_handler(request);
+
+ dev_warn(scic_to_dev(request->owning_controller),
+ "%s: SCIC IO Request requested to start while in wrong "
+ "state %d\n",
+ __func__,
+ sci_base_state_machine_get_state(&request->state_machine));
+
+ return SCI_FAILURE_INVALID_STATE;
+}
+
+enum sci_status
+scic_sds_io_request_terminate(struct scic_sds_request *request)
{
- dev_dbg(dev,
- "%s: resp_iu = %p "
- "resp_iu->status = 0x%x,\nresp_iu->datapres = %d "
- "resp_iu->response_data_len = %x, "
- "resp_iu->sense_data_len = %x\nrepsonse data: ",
+ if (request->state_handlers->abort_handler)
+ return request->state_handlers->abort_handler(request);
+
+ dev_warn(scic_to_dev(request->owning_controller),
+ "%s: SCIC IO Request requested to abort while in wrong "
+ "state %d\n",
__func__,
- resp_iu,
- resp_iu->status,
- resp_iu->datapres,
- resp_iu->response_data_len,
- resp_iu->sense_data_len);
+ sci_base_state_machine_get_state(&request->state_machine));
- task->task_status.stat = resp_iu->status;
+ return SCI_FAILURE_INVALID_STATE;
+}
- /* libsas updates the task status fields based on the response iu. */
- sas_ssp_task_response(dev, task, resp_iu);
+enum sci_status scic_sds_io_request_event_handler(
+ struct scic_sds_request *request,
+ u32 event_code)
+{
+ if (request->state_handlers->event_handler)
+ return request->state_handlers->event_handler(request, event_code);
+
+ dev_warn(scic_to_dev(request->owning_controller),
+ "%s: SCIC IO Request given event code notification %x while "
+ "in wrong state %d\n",
+ __func__,
+ event_code,
+ sci_base_state_machine_get_state(&request->state_machine));
+
+ return SCI_FAILURE_INVALID_STATE;
}
/**
- * isci_request_set_open_reject_status() - This function prepares the I/O
- * completion for OPEN_REJECT conditions.
- * @request: This parameter is the completed isci_request object.
- * @response_ptr: This parameter specifies the service response for the I/O.
- * @status_ptr: This parameter specifies the exec status for the I/O.
- * @complete_to_host_ptr: This parameter specifies the action to be taken by
- * the LLDD with respect to completing this request or forcing an abort
- * condition on the I/O.
- * @open_rej_reason: This parameter specifies the encoded reason for the
- * abandon-class reject.
*
- * none.
+ * @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
*/
-static void isci_request_set_open_reject_status(
- struct isci_request *request,
- struct sas_task *task,
- enum service_response *response_ptr,
- enum exec_status *status_ptr,
- enum isci_completion_selection *complete_to_host_ptr,
- enum sas_open_rej_reason open_rej_reason)
+enum sci_status scic_sds_io_request_frame_handler(
+ struct scic_sds_request *request,
+ u32 frame_index)
{
- /* Task in the target is done. */
- request->complete_in_target = true;
- *response_ptr = SAS_TASK_UNDELIVERED;
- *status_ptr = SAS_OPEN_REJECT;
- *complete_to_host_ptr = isci_perform_normal_io_completion;
- task->task_status.open_rej_reason = open_rej_reason;
+ 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;
}
-/**
- * isci_request_handle_controller_specific_errors() - This function decodes
- * controller-specific I/O completion error conditions.
- * @request: This parameter is the completed isci_request object.
- * @response_ptr: This parameter specifies the service response for the I/O.
- * @status_ptr: This parameter specifies the exec status for the I/O.
- * @complete_to_host_ptr: This parameter specifies the action to be taken by
- * the LLDD with respect to completing this request or forcing an abort
- * condition on the I/O.
- *
- * none.
+/*
+ * This function copies response data for requests returning response data
+ * instead of sense data.
+ * @sci_req: This parameter specifies the request object for which to copy
+ * the response data.
*/
-static void isci_request_handle_controller_specific_errors(
- struct isci_remote_device *isci_device,
- struct isci_request *request,
- struct sas_task *task,
- enum service_response *response_ptr,
- enum exec_status *status_ptr,
- enum isci_completion_selection *complete_to_host_ptr)
+static void scic_sds_io_request_copy_response(struct scic_sds_request *sci_req)
{
- unsigned int cstatus;
+ void *resp_buf;
+ u32 len;
+ struct ssp_response_iu *ssp_response;
+ struct isci_request *ireq = sci_req_to_ireq(sci_req);
+ struct isci_tmf *isci_tmf = isci_request_access_tmf(ireq);
- cstatus = scic_request_get_controller_status(
- request->sci_request_handle
- );
+ ssp_response = &sci_req->ssp.rsp;
- dev_dbg(&request->isci_host->pdev->dev,
- "%s: %p SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR "
- "- controller status = 0x%x\n",
- __func__, request, cstatus);
+ resp_buf = &isci_tmf->resp.resp_iu;
- /* Decode the controller-specific errors; most
- * important is to recognize those conditions in which
- * the target may still have a task outstanding that
- * must be aborted.
- *
- * Note that there are SCU completion codes being
- * named in the decode below for which SCIC has already
- * done work to handle them in a way other than as
- * a controller-specific completion code; these are left
- * in the decode below for completeness sake.
- */
- switch (cstatus) {
- case SCU_TASK_DONE_DMASETUP_DIRERR:
- /* Also SCU_TASK_DONE_SMP_FRM_TYPE_ERR: */
- case SCU_TASK_DONE_XFERCNT_ERR:
- /* Also SCU_TASK_DONE_SMP_UFI_ERR: */
- if (task->task_proto == SAS_PROTOCOL_SMP) {
- /* SCU_TASK_DONE_SMP_UFI_ERR == Task Done. */
- *response_ptr = SAS_TASK_COMPLETE;
+ len = min_t(u32,
+ SSP_RESP_IU_MAX_SIZE,
+ be32_to_cpu(ssp_response->response_data_len));
- /* See if the device has been/is being stopped. Note
- * that we ignore the quiesce state, since we are
- * concerned about the actual device state.
- */
- if ((isci_device->status == isci_stopping) ||
- (isci_device->status == isci_stopped))
- *status_ptr = SAS_DEVICE_UNKNOWN;
- else
- *status_ptr = SAS_ABORTED_TASK;
+ memcpy(resp_buf, ssp_response->resp_data, len);
+}
- request->complete_in_target = true;
+/*
+ * This method implements the action taken when a constructed
+ * SCIC_SDS_IO_REQUEST_T object receives a scic_sds_request_start() request.
+ * This method will, if necessary, allocate a TCi for the io request object and
+ * then will, if necessary, copy the constructed TC data into the actual TC
+ * buffer. If everything is successful the post context field is updated with
+ * the TCi so the controller can post the request to the hardware. enum sci_status
+ * SCI_SUCCESS SCI_FAILURE_INSUFFICIENT_RESOURCES
+ */
+static enum sci_status scic_sds_request_constructed_state_start_handler(
+ struct scic_sds_request *request)
+{
+ struct scu_task_context *task_context;
- *complete_to_host_ptr =
- isci_perform_normal_io_completion;
- } else {
- /* Task in the target is not done. */
- *response_ptr = SAS_TASK_UNDELIVERED;
+ if (request->io_tag == SCI_CONTROLLER_INVALID_IO_TAG) {
+ request->io_tag =
+ scic_controller_allocate_io_tag(request->owning_controller);
+ }
- if ((isci_device->status == isci_stopping) ||
- (isci_device->status == isci_stopped))
- *status_ptr = SAS_DEVICE_UNKNOWN;
- else
- *status_ptr = SAM_STAT_TASK_ABORTED;
+ /* Record the IO Tag in the request */
+ if (request->io_tag != SCI_CONTROLLER_INVALID_IO_TAG) {
+ task_context = request->task_context_buffer;
- request->complete_in_target = false;
+ task_context->task_index = scic_sds_io_tag_get_index(request->io_tag);
- *complete_to_host_ptr =
- isci_perform_error_io_completion;
- }
+ switch (task_context->protocol_type) {
+ case SCU_TASK_CONTEXT_PROTOCOL_SMP:
+ case SCU_TASK_CONTEXT_PROTOCOL_SSP:
+ /* SSP/SMP Frame */
+ task_context->type.ssp.tag = request->io_tag;
+ task_context->type.ssp.target_port_transfer_tag = 0xFFFF;
+ break;
- break;
+ case SCU_TASK_CONTEXT_PROTOCOL_STP:
+ /*
+ * STP/SATA Frame
+ * task_context->type.stp.ncq_tag = request->ncq_tag; */
+ break;
- case SCU_TASK_DONE_CRC_ERR:
- case SCU_TASK_DONE_NAK_CMD_ERR:
- case SCU_TASK_DONE_EXCESS_DATA:
- case SCU_TASK_DONE_UNEXP_FIS:
- /* Also SCU_TASK_DONE_UNEXP_RESP: */
- case SCU_TASK_DONE_VIIT_ENTRY_NV: /* TODO - conditions? */
- case SCU_TASK_DONE_IIT_ENTRY_NV: /* TODO - conditions? */
- case SCU_TASK_DONE_RNCNV_OUTBOUND: /* TODO - conditions? */
- /* These are conditions in which the target
- * has completed the task, so that no cleanup
- * is necessary.
- */
- *response_ptr = SAS_TASK_COMPLETE;
+ case SCU_TASK_CONTEXT_PROTOCOL_NONE:
+ /* / @todo When do we set no protocol type? */
+ break;
- /* See if the device has been/is being stopped. Note
- * that we ignore the quiesce state, since we are
- * concerned about the actual device state.
- */
- if ((isci_device->status == isci_stopping) ||
- (isci_device->status == isci_stopped))
- *status_ptr = SAS_DEVICE_UNKNOWN;
- else
- *status_ptr = SAS_ABORTED_TASK;
+ default:
+ /* This should never happen since we build the IO requests */
+ break;
+ }
- request->complete_in_target = true;
+ /*
+ * Check to see if we need to copy the task context buffer
+ * or have been building into the task context buffer */
+ if (request->was_tag_assigned_by_user == false) {
+ scic_sds_controller_copy_task_context(
+ request->owning_controller, request);
+ }
- *complete_to_host_ptr = isci_perform_normal_io_completion;
- break;
+ /* Add to the post_context the io tag value */
+ request->post_context |= scic_sds_io_tag_get_index(request->io_tag);
+ /* Everything is good go ahead and change state */
+ sci_base_state_machine_change_state(&request->state_machine,
+ SCI_BASE_REQUEST_STATE_STARTED);
- /* Note that the only open reject completion codes seen here will be
- * abandon-class codes; all others are automatically retried in the SCU.
- */
- case SCU_TASK_OPEN_REJECT_WRONG_DESTINATION:
+ return SCI_SUCCESS;
+ }
- isci_request_set_open_reject_status(
- request, task, response_ptr, status_ptr,
- complete_to_host_ptr, SAS_OREJ_WRONG_DEST);
- break;
+ return SCI_FAILURE_INSUFFICIENT_RESOURCES;
+}
- case SCU_TASK_OPEN_REJECT_ZONE_VIOLATION:
+/*
+ * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T
+ * object receives a scic_sds_request_terminate() request. Since the request
+ * has not yet been posted to the hardware the request transitions to the
+ * completed state. enum sci_status SCI_SUCCESS
+ */
+static enum sci_status scic_sds_request_constructed_state_abort_handler(
+ struct scic_sds_request *request)
+{
+ /*
+ * This request has been terminated by the user make sure that the correct
+ * status code is returned */
+ scic_sds_request_set_status(request,
+ SCU_TASK_DONE_TASK_ABORT,
+ SCI_FAILURE_IO_TERMINATED);
+
+ sci_base_state_machine_change_state(&request->state_machine,
+ SCI_BASE_REQUEST_STATE_COMPLETED);
+ return SCI_SUCCESS;
+}
- /* Note - the return of AB0 will change when
- * libsas implements detection of zone violations.
- */
- isci_request_set_open_reject_status(
- request, task, response_ptr, status_ptr,
- complete_to_host_ptr, SAS_OREJ_RESV_AB0);
- break;
+/*
+ * *****************************************************************************
+ * * STARTED STATE HANDLERS
+ * ***************************************************************************** */
- case SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_1:
+/*
+ * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T
+ * object receives a scic_sds_request_terminate() request. Since the request
+ * has been posted to the hardware the io request state is changed to the
+ * aborting state. enum sci_status SCI_SUCCESS
+ */
+enum sci_status scic_sds_request_started_state_abort_handler(
+ struct scic_sds_request *request)
+{
+ if (request->has_started_substate_machine)
+ sci_base_state_machine_stop(&request->started_substate_machine);
- isci_request_set_open_reject_status(
- request, task, response_ptr, status_ptr,
- complete_to_host_ptr, SAS_OREJ_RESV_AB1);
- break;
+ sci_base_state_machine_change_state(&request->state_machine,
+ SCI_BASE_REQUEST_STATE_ABORTING);
+ return SCI_SUCCESS;
+}
- case SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_2:
+/*
+ * scic_sds_request_started_state_tc_completion_handler() - This method process
+ * TC (task context) completions for normal IO request (i.e. Task/Abort
+ * Completions of type 0). This method will update the
+ * SCIC_SDS_IO_REQUEST_T::status field.
+ * @sci_req: This parameter specifies the request for which a completion
+ * occurred.
+ * @completion_code: This parameter specifies the completion code received from
+ * the SCU.
+ *
+ */
+static enum sci_status
+scic_sds_request_started_state_tc_completion_handler(struct scic_sds_request *sci_req,
+ u32 completion_code)
+{
+ u8 datapres;
+ struct ssp_response_iu *resp_iu;
- isci_request_set_open_reject_status(
- request, task, response_ptr, status_ptr,
- complete_to_host_ptr, SAS_OREJ_RESV_AB2);
+ /*
+ * TODO: Any SDMA return code of other than 0 is bad
+ * decode 0x003C0000 to determine SDMA status
+ */
+ switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) {
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD):
+ scic_sds_request_set_status(sci_req,
+ SCU_TASK_DONE_GOOD,
+ SCI_SUCCESS);
break;
- case SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_3:
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_EARLY_RESP):
+ {
+ /*
+ * There are times when the SCU hardware will return an early
+ * response because the io request specified more data than is
+ * returned by the target device (mode pages, inquiry data,
+ * etc.). We must check the response stats to see if this is
+ * truly a failed request or a good request that just got
+ * completed early.
+ */
+ struct ssp_response_iu *resp = &sci_req->ssp.rsp;
+ ssize_t word_cnt = SSP_RESP_IU_MAX_SIZE / sizeof(u32);
+
+ sci_swab32_cpy(&sci_req->ssp.rsp,
+ &sci_req->ssp.rsp,
+ word_cnt);
+
+ if (resp->status == 0) {
+ scic_sds_request_set_status(
+ sci_req,
+ SCU_TASK_DONE_GOOD,
+ SCI_SUCCESS_IO_DONE_EARLY);
+ } else {
+ scic_sds_request_set_status(
+ sci_req,
+ SCU_TASK_DONE_CHECK_RESPONSE,
+ SCI_FAILURE_IO_RESPONSE_VALID);
+ }
+ }
+ break;
- isci_request_set_open_reject_status(
- request, task, response_ptr, status_ptr,
- complete_to_host_ptr, SAS_OREJ_RESV_AB3);
- break;
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_CHECK_RESPONSE):
+ {
+ ssize_t word_cnt = SSP_RESP_IU_MAX_SIZE / sizeof(u32);
- case SCU_TASK_OPEN_REJECT_BAD_DESTINATION:
+ sci_swab32_cpy(&sci_req->ssp.rsp,
+ &sci_req->ssp.rsp,
+ word_cnt);
- isci_request_set_open_reject_status(
- request, task, response_ptr, status_ptr,
- complete_to_host_ptr, SAS_OREJ_BAD_DEST);
+ scic_sds_request_set_status(sci_req,
+ SCU_TASK_DONE_CHECK_RESPONSE,
+ SCI_FAILURE_IO_RESPONSE_VALID);
break;
+ }
- case SCU_TASK_OPEN_REJECT_STP_RESOURCES_BUSY:
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_RESP_LEN_ERR):
+ /*
+ * / @todo With TASK_DONE_RESP_LEN_ERR is the response frame
+ * guaranteed to be received before this completion status is
+ * posted?
+ */
+ resp_iu = &sci_req->ssp.rsp;
+ datapres = resp_iu->datapres;
+
+ if ((datapres == 0x01) || (datapres == 0x02)) {
+ scic_sds_request_set_status(
+ sci_req,
+ SCU_TASK_DONE_CHECK_RESPONSE,
+ SCI_FAILURE_IO_RESPONSE_VALID);
+ } else
+ scic_sds_request_set_status(
+ sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS);
+ break;
- isci_request_set_open_reject_status(
- request, task, response_ptr, status_ptr,
- complete_to_host_ptr, SAS_OREJ_STP_NORES);
+ /* only stp device gets suspended. */
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_ACK_NAK_TO):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_LL_PERR):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_NAK_ERR):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_DATA_LEN_ERR):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_LL_ABORT_ERR):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_XR_WD_LEN):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_MAX_PLD_ERR):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_UNEXP_RESP):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_UNEXP_SDBFIS):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_REG_ERR):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SDB_ERR):
+ if (sci_req->protocol == SCIC_STP_PROTOCOL) {
+ scic_sds_request_set_status(
+ sci_req,
+ SCU_GET_COMPLETION_TL_STATUS(completion_code) >>
+ SCU_COMPLETION_TL_STATUS_SHIFT,
+ SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED);
+ } else {
+ scic_sds_request_set_status(
+ sci_req,
+ SCU_GET_COMPLETION_TL_STATUS(completion_code) >>
+ SCU_COMPLETION_TL_STATUS_SHIFT,
+ SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR);
+ }
break;
- case SCU_TASK_OPEN_REJECT_PROTOCOL_NOT_SUPPORTED:
+ /* both stp/ssp device gets suspended */
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_LF_ERR):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_WRONG_DESTINATION):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_1):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_2):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_3):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_BAD_DESTINATION):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_ZONE_VIOLATION):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_STP_RESOURCES_BUSY):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_PROTOCOL_NOT_SUPPORTED):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_CONNECTION_RATE_NOT_SUPPORTED):
+ scic_sds_request_set_status(
+ sci_req,
+ SCU_GET_COMPLETION_TL_STATUS(completion_code) >>
+ SCU_COMPLETION_TL_STATUS_SHIFT,
+ SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED);
+ break;
- isci_request_set_open_reject_status(
- request, task, response_ptr, status_ptr,
- complete_to_host_ptr, SAS_OREJ_EPROTO);
+ /* neither ssp nor stp gets suspended. */
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_NAK_CMD_ERR):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_UNEXP_XR):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_XR_IU_LEN_ERR):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SDMA_ERR):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_OFFSET_ERR):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_EXCESS_DATA):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_RESP_TO_ERR):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_UFI_ERR):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_FRM_TYPE_ERR):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_LL_RX_ERR):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_UNEXP_DATA):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_OPEN_FAIL):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_VIIT_ENTRY_NV):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_IIT_ENTRY_NV):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_RNCNV_OUTBOUND):
+ default:
+ scic_sds_request_set_status(
+ sci_req,
+ SCU_GET_COMPLETION_TL_STATUS(completion_code) >>
+ SCU_COMPLETION_TL_STATUS_SHIFT,
+ SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR);
break;
+ }
- case SCU_TASK_OPEN_REJECT_CONNECTION_RATE_NOT_SUPPORTED:
+ /*
+ * TODO: This is probably wrong for ACK/NAK timeout conditions
+ */
- isci_request_set_open_reject_status(
- request, task, response_ptr, status_ptr,
- complete_to_host_ptr, SAS_OREJ_CONN_RATE);
- break;
+ /* In all cases we will treat this as the completion of the IO req. */
+ sci_base_state_machine_change_state(
+ &sci_req->state_machine,
+ SCI_BASE_REQUEST_STATE_COMPLETED);
+ return SCI_SUCCESS;
+}
- case SCU_TASK_DONE_LL_R_ERR:
- /* Also SCU_TASK_DONE_ACK_NAK_TO: */
- case SCU_TASK_DONE_LL_PERR:
- case SCU_TASK_DONE_LL_SY_TERM:
- /* Also SCU_TASK_DONE_NAK_ERR:*/
- case SCU_TASK_DONE_LL_LF_TERM:
- /* Also SCU_TASK_DONE_DATA_LEN_ERR: */
- case SCU_TASK_DONE_LL_ABORT_ERR:
- case SCU_TASK_DONE_SEQ_INV_TYPE:
- /* Also SCU_TASK_DONE_UNEXP_XR: */
- case SCU_TASK_DONE_XR_IU_LEN_ERR:
- case SCU_TASK_DONE_INV_FIS_LEN:
- /* Also SCU_TASK_DONE_XR_WD_LEN: */
- case SCU_TASK_DONE_SDMA_ERR:
- case SCU_TASK_DONE_OFFSET_ERR:
- case SCU_TASK_DONE_MAX_PLD_ERR:
- case SCU_TASK_DONE_LF_ERR:
- case SCU_TASK_DONE_SMP_RESP_TO_ERR: /* Escalate to dev reset? */
- case SCU_TASK_DONE_SMP_LL_RX_ERR:
- case SCU_TASK_DONE_UNEXP_DATA:
- case SCU_TASK_DONE_UNEXP_SDBFIS:
- case SCU_TASK_DONE_REG_ERR:
- case SCU_TASK_DONE_SDB_ERR:
- case SCU_TASK_DONE_TASK_ABORT:
- default:
- /* Task in the target is not done. */
- *response_ptr = SAS_TASK_UNDELIVERED;
- *status_ptr = SAM_STAT_TASK_ABORTED;
- request->complete_in_target = false;
+enum sci_status
+scic_sds_io_request_tc_completion(struct scic_sds_request *request, u32 completion_code)
+{
+ if (request->state_machine.current_state_id == SCI_BASE_REQUEST_STATE_STARTED &&
+ request->has_started_substate_machine == false)
+ return scic_sds_request_started_state_tc_completion_handler(request, completion_code);
+ else if (request->state_handlers->tc_completion_handler)
+ return request->state_handlers->tc_completion_handler(request, completion_code);
+
+ dev_warn(scic_to_dev(request->owning_controller),
+ "%s: SCIC IO Request given task completion notification %x "
+ "while in wrong state %d\n",
+ __func__,
+ completion_code,
+ sci_base_state_machine_get_state(&request->state_machine));
- *complete_to_host_ptr = isci_perform_error_io_completion;
- break;
+ return SCI_FAILURE_INVALID_STATE;
+}
+
+/*
+ * 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;
}
-/**
- * isci_task_save_for_upper_layer_completion() - This function saves the
- * request for later completion to the upper layer driver.
- * @host: This parameter is a pointer to the host on which the the request
- * should be queued (either as an error or success).
- * @request: This parameter is the completed request.
- * @response: This parameter is the response code for the completed task.
- * @status: This parameter is the status code for the completed task.
- *
- * none.
+/*
+ * *****************************************************************************
+ * * 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
+ * transitioning to the final state? enum sci_status SCI_SUCCESS
*/
-static void isci_task_save_for_upper_layer_completion(
- struct isci_host *host,
- struct isci_request *request,
- enum service_response response,
- enum exec_status status,
- enum isci_completion_selection task_notification_selection)
+static enum sci_status scic_sds_request_completed_state_complete_handler(
+ struct scic_sds_request *request)
{
- struct sas_task *task = isci_request_access_task(request);
+ if (request->was_tag_assigned_by_user != true) {
+ scic_controller_free_io_tag(
+ request->owning_controller, request->io_tag);
+ }
- task_notification_selection
- = isci_task_set_completion_status(task, response, status,
- task_notification_selection);
+ if (request->saved_rx_frame_index != SCU_INVALID_FRAME_INDEX) {
+ scic_sds_controller_release_frame(
+ request->owning_controller, request->saved_rx_frame_index);
+ }
- /* Tasks aborted specifically by a call to the lldd_abort_task
- * function should not be completed to the host in the regular path.
- */
- switch (task_notification_selection) {
+ sci_base_state_machine_change_state(&request->state_machine,
+ SCI_BASE_REQUEST_STATE_FINAL);
+ return SCI_SUCCESS;
+}
- case isci_perform_normal_io_completion:
+/*
+ * *****************************************************************************
+ * * ABORTING STATE HANDLERS
+ * ***************************************************************************** */
- /* Normal notification (task_done) */
- dev_dbg(&host->pdev->dev,
- "%s: Normal - task = %p, response=%d (%d), status=%d (%d)\n",
- __func__,
- task,
- task->task_status.resp, response,
- task->task_status.stat, status);
- /* Add to the completed list. */
- list_add(&request->completed_node,
- &host->requests_to_complete);
+/*
+ * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T
+ * object receives a scic_sds_request_terminate() request. This method is the
+ * io request aborting state abort handlers. On receipt of a multiple
+ * terminate requests the io request will transition to the completed state.
+ * This should not happen in normal operation. enum sci_status SCI_SUCCESS
+ */
+static enum sci_status scic_sds_request_aborting_state_abort_handler(
+ struct scic_sds_request *request)
+{
+ sci_base_state_machine_change_state(&request->state_machine,
+ SCI_BASE_REQUEST_STATE_COMPLETED);
+ return SCI_SUCCESS;
+}
- /* Take the request off the device's pending request list. */
- list_del_init(&request->dev_node);
+/*
+ * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T
+ * object receives a scic_sds_request_task_completion() request. This method
+ * decodes the completion type waiting for the abort task complete
+ * notification. When the abort task complete is received the io request
+ * transitions to the completed state. enum sci_status SCI_SUCCESS
+ */
+static enum sci_status scic_sds_request_aborting_state_tc_completion_handler(
+ struct scic_sds_request *sci_req,
+ u32 completion_code)
+{
+ switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) {
+ case (SCU_TASK_DONE_GOOD << SCU_COMPLETION_TL_STATUS_SHIFT):
+ case (SCU_TASK_DONE_TASK_ABORT << SCU_COMPLETION_TL_STATUS_SHIFT):
+ scic_sds_request_set_status(
+ sci_req, SCU_TASK_DONE_TASK_ABORT, SCI_FAILURE_IO_TERMINATED
+ );
+
+ sci_base_state_machine_change_state(&sci_req->state_machine,
+ SCI_BASE_REQUEST_STATE_COMPLETED);
break;
- case isci_perform_aborted_io_completion:
- /* No notification to libsas because this request is
- * already in the abort path.
- */
- dev_warn(&host->pdev->dev,
- "%s: Aborted - task = %p, response=%d (%d), status=%d (%d)\n",
- __func__,
- task,
- task->task_status.resp, response,
- task->task_status.stat, status);
+ default:
+ /*
+ * Unless we get some strange error wait for the task abort to complete
+ * TODO: Should there be a state change for this completion? */
+ break;
+ }
- /* Wake up whatever process was waiting for this
- * request to complete.
- */
- WARN_ON(request->io_request_completion == NULL);
+ return SCI_SUCCESS;
+}
- if (request->io_request_completion != NULL) {
+/*
+ * 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? */
- /* Signal whoever is waiting that this
- * request is complete.
- */
- complete(request->io_request_completion);
- }
+ 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
+ * raw frame was sent successfully, then the state for the task request
+ * transitions to waiting for a response frame.
+ * @sci_req: This parameter specifies the request for which the TC
+ * completion was received.
+ * @completion_code: This parameter indicates the completion status information
+ * for the TC.
+ *
+ * Indicate if the tc completion handler was successful. SCI_SUCCESS currently
+ * this method always returns success.
+ */
+static enum sci_status scic_sds_ssp_task_request_await_tc_completion_tc_completion_handler(
+ struct scic_sds_request *sci_req,
+ u32 completion_code)
+{
+ switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) {
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD):
+ 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_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE);
break;
- case isci_perform_error_io_completion:
- /* Use sas_task_abort */
- dev_warn(&host->pdev->dev,
- "%s: Error - task = %p, response=%d (%d), status=%d (%d)\n",
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_ACK_NAK_TO):
+ /*
+ * Currently, the decision is to simply allow the task request to
+ * timeout if the task IU wasn't received successfully.
+ * There is a potential for receiving multiple task responses if we
+ * decide to send the task IU again. */
+ dev_warn(scic_to_dev(sci_req->owning_controller),
+ "%s: TaskRequest:0x%p CompletionCode:%x - "
+ "ACK/NAK timeout\n",
__func__,
- task,
- task->task_status.resp, response,
- task->task_status.stat, status);
- /* Add to the aborted list. */
- list_add(&request->completed_node,
- &host->requests_to_errorback);
+ sci_req,
+ completion_code);
+
+ sci_base_state_machine_change_state(&sci_req->state_machine,
+ SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE);
break;
default:
- dev_warn(&host->pdev->dev,
- "%s: Unknown - task = %p, response=%d (%d), status=%d (%d)\n",
- __func__,
- task,
- task->task_status.resp, response,
- task->task_status.stat, status);
+ /*
+ * All other completion status cause the IO to be complete. If a NAK
+ * was received, then it is up to the user to retry the request. */
+ scic_sds_request_set_status(
+ sci_req,
+ SCU_NORMALIZE_COMPLETION_STATUS(completion_code),
+ SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR
+ );
- /* Add to the error to libsas list. */
- list_add(&request->completed_node,
- &host->requests_to_errorback);
+ sci_base_state_machine_change_state(&sci_req->state_machine,
+ SCI_BASE_REQUEST_STATE_COMPLETED);
break;
}
+
+ return SCI_SUCCESS;
}
/**
- * isci_request_io_request_complete() - This function is called by the sci core
- * when an io request completes.
- * @isci_host: This parameter specifies the ISCI host object
- * @request: This parameter is the completed isci_request object.
- * @completion_status: This parameter specifies the completion status from the
- * sci core.
+ * This method is responsible for processing a terminate/abort request for this
+ * TC while the request is waiting for the task management response
+ * unsolicited frame.
+ * @sci_req: This parameter specifies the request for which the
+ * termination was requested.
*
- * none.
+ * This method returns an indication as to whether the abort request was
+ * successfully handled. need to update to ensure the received UF doesn't cause
+ * damage to subsequent requests (i.e. put the extended tag in a holding
+ * pattern for this particular device).
*/
-void isci_request_io_request_complete(
- struct isci_host *isci_host,
- struct isci_request *request,
- enum sci_io_status completion_status)
+static enum sci_status scic_sds_ssp_task_request_await_tc_response_abort_handler(
+ struct scic_sds_request *request)
{
- struct sas_task *task = isci_request_access_task(request);
- struct ssp_response_iu *resp_iu;
- void *resp_buf;
- unsigned long task_flags;
- struct isci_remote_device *isci_device = request->isci_device;
- enum service_response response = SAS_TASK_UNDELIVERED;
- enum exec_status status = SAS_ABORTED_TASK;
- enum isci_request_status request_status;
- enum isci_completion_selection complete_to_host
- = isci_perform_normal_io_completion;
+ sci_base_state_machine_change_state(&request->state_machine,
+ SCI_BASE_REQUEST_STATE_ABORTING);
+ sci_base_state_machine_change_state(&request->state_machine,
+ SCI_BASE_REQUEST_STATE_COMPLETED);
+ return SCI_SUCCESS;
+}
- dev_dbg(&isci_host->pdev->dev,
- "%s: request = %p, task = %p,\n"
- "task->data_dir = %d completion_status = 0x%x\n",
- __func__,
- request,
- task,
- task->data_dir,
- completion_status);
+/**
+ * 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);
- spin_lock(&request->state_lock);
- request_status = isci_request_get_state(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;
+}
- /* Decode the request status. Note that if the request has been
- * aborted by a task management function, we don't care
- * what the status is.
+/**
+ * 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.
+ * @sci_req: This parameter specifies the request for which the TC
+ * completion was received.
+ * @completion_code: This parameter indicates the completion status information
+ * for the TC.
+ *
+ * Indicate if the tc completion handler was successful. SCI_SUCCESS currently
+ * this method always returns success.
+ */
+static enum sci_status scic_sds_smp_request_await_response_tc_completion_handler(
+ struct scic_sds_request *sci_req,
+ u32 completion_code)
+{
+ switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) {
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD):
+ /*
+ * In the AWAIT RESPONSE state, any TC completion is unexpected.
+ * but if the TC has success status, we complete the IO anyway. */
+ scic_sds_request_set_status(
+ sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS
+ );
+
+ sci_base_state_machine_change_state(
+ &sci_req->state_machine,
+ SCI_BASE_REQUEST_STATE_COMPLETED);
+ break;
+
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_RESP_TO_ERR):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_UFI_ERR):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_FRM_TYPE_ERR):
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_LL_RX_ERR):
+ /*
+ * These status has been seen in a specific LSI expander, which sometimes
+ * is not able to send smp response within 2 ms. This causes our hardware
+ * break the connection and set TC completion with one of these SMP_XXX_XX_ERR
+ * status. For these type of error, we ask scic user to retry the request. */
+ scic_sds_request_set_status(
+ sci_req, SCU_TASK_DONE_SMP_RESP_TO_ERR, SCI_FAILURE_RETRY_REQUIRED
+ );
+
+ sci_base_state_machine_change_state(
+ &sci_req->state_machine,
+ SCI_BASE_REQUEST_STATE_COMPLETED);
+ break;
+
+ default:
+ /*
+ * All other completion status cause the IO to be complete. If a NAK
+ * was received, then it is up to the user to retry the request. */
+ scic_sds_request_set_status(
+ sci_req,
+ SCU_NORMALIZE_COMPLETION_STATUS(completion_code),
+ SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR
+ );
+
+ sci_base_state_machine_change_state(
+ &sci_req->state_machine,
+ SCI_BASE_REQUEST_STATE_COMPLETED);
+ break;
+ }
+
+ 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
+ * was sent successfully, then the state for the SMP request transits to
+ * waiting for a response frame.
+ * @sci_req: This parameter specifies the request for which the TC
+ * completion was received.
+ * @completion_code: This parameter indicates the completion status information
+ * for the TC.
+ *
+ * Indicate if the tc completion handler was successful. SCI_SUCCESS currently
+ * this method always returns success.
+ */
+static enum sci_status scic_sds_smp_request_await_tc_completion_tc_completion_handler(
+ struct scic_sds_request *sci_req,
+ u32 completion_code)
+{
+ switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) {
+ case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD):
+ scic_sds_request_set_status(
+ sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS
+ );
+
+ sci_base_state_machine_change_state(
+ &sci_req->state_machine,
+ SCI_BASE_REQUEST_STATE_COMPLETED);
+ break;
+
+ default:
+ /*
+ * All other completion status cause the IO to be complete. If a NAK
+ * was received, then it is up to the user to retry the request. */
+ scic_sds_request_set_status(
+ sci_req,
+ SCU_NORMALIZE_COMPLETION_STATUS(completion_code),
+ SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR
+ );
+
+ sci_base_state_machine_change_state(
+ &sci_req->state_machine,
+ SCI_BASE_REQUEST_STATE_COMPLETED);
+ break;
+ }
+
+ return SCI_SUCCESS;
+}
+
+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] = {
+ .start_handler = scic_sds_request_constructed_state_start_handler,
+ .abort_handler = scic_sds_request_constructed_state_abort_handler,
+ },
+ [SCI_BASE_REQUEST_STATE_STARTED] = {
+ .abort_handler = scic_sds_request_started_state_abort_handler,
+ .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] = {
+ .abort_handler = scic_sds_request_started_state_abort_handler,
+ .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] = {
+ .abort_handler = scic_sds_ssp_task_request_await_tc_response_abort_handler,
+ .frame_handler = scic_sds_ssp_task_request_await_tc_response_frame_handler,
+ },
+ [SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_RESPONSE] = {
+ .abort_handler = scic_sds_request_started_state_abort_handler,
+ .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] = {
+ .abort_handler = scic_sds_request_started_state_abort_handler,
+ .tc_completion_handler = scic_sds_smp_request_await_tc_completion_tc_completion_handler,
+ },
+ [SCI_BASE_REQUEST_STATE_COMPLETED] = {
+ .complete_handler = scic_sds_request_completed_state_complete_handler,
+ },
+ [SCI_BASE_REQUEST_STATE_ABORTING] = {
+ .abort_handler = scic_sds_request_aborting_state_abort_handler,
+ .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] = { },
+};
+
+
+/**
+ * isci_request_process_response_iu() - This function sets the status and
+ * response iu, in the task struct, from the request object for the upper
+ * layer driver.
+ * @sas_task: This parameter is the task struct from the upper layer driver.
+ * @resp_iu: This parameter points to the response iu of the completed request.
+ * @dev: This parameter specifies the linux device struct.
+ *
+ * none.
+ */
+static void isci_request_process_response_iu(
+ struct sas_task *task,
+ struct ssp_response_iu *resp_iu,
+ struct device *dev)
+{
+ dev_dbg(dev,
+ "%s: resp_iu = %p "
+ "resp_iu->status = 0x%x,\nresp_iu->datapres = %d "
+ "resp_iu->response_data_len = %x, "
+ "resp_iu->sense_data_len = %x\nrepsonse data: ",
+ __func__,
+ resp_iu,
+ resp_iu->status,
+ resp_iu->datapres,
+ resp_iu->response_data_len,
+ resp_iu->sense_data_len);
+
+ task->task_status.stat = resp_iu->status;
+
+ /* libsas updates the task status fields based on the response iu. */
+ sas_ssp_task_response(dev, task, resp_iu);
+}
+
+/**
+ * isci_request_set_open_reject_status() - This function prepares the I/O
+ * completion for OPEN_REJECT conditions.
+ * @request: This parameter is the completed isci_request object.
+ * @response_ptr: This parameter specifies the service response for the I/O.
+ * @status_ptr: This parameter specifies the exec status for the I/O.
+ * @complete_to_host_ptr: This parameter specifies the action to be taken by
+ * the LLDD with respect to completing this request or forcing an abort
+ * condition on the I/O.
+ * @open_rej_reason: This parameter specifies the encoded reason for the
+ * abandon-class reject.
+ *
+ * none.
+ */
+static void isci_request_set_open_reject_status(
+ struct isci_request *request,
+ struct sas_task *task,
+ enum service_response *response_ptr,
+ enum exec_status *status_ptr,
+ enum isci_completion_selection *complete_to_host_ptr,
+ enum sas_open_rej_reason open_rej_reason)
+{
+ /* Task in the target is done. */
+ request->complete_in_target = true;
+ *response_ptr = SAS_TASK_UNDELIVERED;
+ *status_ptr = SAS_OPEN_REJECT;
+ *complete_to_host_ptr = isci_perform_normal_io_completion;
+ task->task_status.open_rej_reason = open_rej_reason;
+}
+
+/**
+ * isci_request_handle_controller_specific_errors() - This function decodes
+ * controller-specific I/O completion error conditions.
+ * @request: This parameter is the completed isci_request object.
+ * @response_ptr: This parameter specifies the service response for the I/O.
+ * @status_ptr: This parameter specifies the exec status for the I/O.
+ * @complete_to_host_ptr: This parameter specifies the action to be taken by
+ * the LLDD with respect to completing this request or forcing an abort
+ * condition on the I/O.
+ *
+ * none.
+ */
+static void isci_request_handle_controller_specific_errors(
+ struct isci_remote_device *isci_device,
+ struct isci_request *request,
+ struct sas_task *task,
+ enum service_response *response_ptr,
+ enum exec_status *status_ptr,
+ enum isci_completion_selection *complete_to_host_ptr)
+{
+ unsigned int cstatus;
+
+ cstatus = request->sci.scu_status;
+
+ dev_dbg(&request->isci_host->pdev->dev,
+ "%s: %p SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR "
+ "- controller status = 0x%x\n",
+ __func__, request, cstatus);
+
+ /* Decode the controller-specific errors; most
+ * important is to recognize those conditions in which
+ * the target may still have a task outstanding that
+ * must be aborted.
+ *
+ * Note that there are SCU completion codes being
+ * named in the decode below for which SCIC has already
+ * done work to handle them in a way other than as
+ * a controller-specific completion code; these are left
+ * in the decode below for completeness sake.
*/
- switch (request_status) {
+ switch (cstatus) {
+ case SCU_TASK_DONE_DMASETUP_DIRERR:
+ /* Also SCU_TASK_DONE_SMP_FRM_TYPE_ERR: */
+ case SCU_TASK_DONE_XFERCNT_ERR:
+ /* Also SCU_TASK_DONE_SMP_UFI_ERR: */
+ if (task->task_proto == SAS_PROTOCOL_SMP) {
+ /* SCU_TASK_DONE_SMP_UFI_ERR == Task Done. */
+ *response_ptr = SAS_TASK_COMPLETE;
- case aborted:
- /* "aborted" indicates that the request was aborted by a task
- * management function, since once a task management request is
- * perfomed by the device, the request only completes because
- * of the subsequent driver terminate.
- *
- * Aborted also means an external thread is explicitly managing
- * this request, so that we do not complete it up the stack.
- *
- * The target is still there (since the TMF was successful).
+ /* See if the device has been/is being stopped. Note
+ * that we ignore the quiesce state, since we are
+ * concerned about the actual device state.
+ */
+ if ((isci_device->status == isci_stopping) ||
+ (isci_device->status == isci_stopped))
+ *status_ptr = SAS_DEVICE_UNKNOWN;
+ else
+ *status_ptr = SAS_ABORTED_TASK;
+
+ request->complete_in_target = true;
+
+ *complete_to_host_ptr =
+ isci_perform_normal_io_completion;
+ } else {
+ /* Task in the target is not done. */
+ *response_ptr = SAS_TASK_UNDELIVERED;
+
+ if ((isci_device->status == isci_stopping) ||
+ (isci_device->status == isci_stopped))
+ *status_ptr = SAS_DEVICE_UNKNOWN;
+ else
+ *status_ptr = SAM_STAT_TASK_ABORTED;
+
+ request->complete_in_target = false;
+
+ *complete_to_host_ptr =
+ isci_perform_error_io_completion;
+ }
+
+ break;
+
+ case SCU_TASK_DONE_CRC_ERR:
+ case SCU_TASK_DONE_NAK_CMD_ERR:
+ case SCU_TASK_DONE_EXCESS_DATA:
+ case SCU_TASK_DONE_UNEXP_FIS:
+ /* Also SCU_TASK_DONE_UNEXP_RESP: */
+ case SCU_TASK_DONE_VIIT_ENTRY_NV: /* TODO - conditions? */
+ case SCU_TASK_DONE_IIT_ENTRY_NV: /* TODO - conditions? */
+ case SCU_TASK_DONE_RNCNV_OUTBOUND: /* TODO - conditions? */
+ /* These are conditions in which the target
+ * has completed the task, so that no cleanup
+ * is necessary.
*/
- request->complete_in_target = true;
- response = SAS_TASK_COMPLETE;
+ *response_ptr = SAS_TASK_COMPLETE;
/* See if the device has been/is being stopped. Note
* that we ignore the quiesce state, since we are
* concerned about the actual device state.
*/
- if ((isci_device->status == isci_stopping)
- || (isci_device->status == isci_stopped)
- )
- status = SAS_DEVICE_UNKNOWN;
+ if ((isci_device->status == isci_stopping) ||
+ (isci_device->status == isci_stopped))
+ *status_ptr = SAS_DEVICE_UNKNOWN;
else
- status = SAS_ABORTED_TASK;
+ *status_ptr = SAS_ABORTED_TASK;
- complete_to_host = isci_perform_aborted_io_completion;
- /* This was an aborted request. */
+ request->complete_in_target = true;
+
+ *complete_to_host_ptr = isci_perform_normal_io_completion;
+ break;
+
+
+ /* Note that the only open reject completion codes seen here will be
+ * abandon-class codes; all others are automatically retried in the SCU.
+ */
+ case SCU_TASK_OPEN_REJECT_WRONG_DESTINATION:
+
+ isci_request_set_open_reject_status(
+ request, task, response_ptr, status_ptr,
+ complete_to_host_ptr, SAS_OREJ_WRONG_DEST);
+ break;
+
+ case SCU_TASK_OPEN_REJECT_ZONE_VIOLATION:
+
+ /* Note - the return of AB0 will change when
+ * libsas implements detection of zone violations.
+ */
+ isci_request_set_open_reject_status(
+ request, task, response_ptr, status_ptr,
+ complete_to_host_ptr, SAS_OREJ_RESV_AB0);
+ break;
+
+ case SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_1:
+
+ isci_request_set_open_reject_status(
+ request, task, response_ptr, status_ptr,
+ complete_to_host_ptr, SAS_OREJ_RESV_AB1);
+ break;
+
+ case SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_2:
+
+ isci_request_set_open_reject_status(
+ request, task, response_ptr, status_ptr,
+ complete_to_host_ptr, SAS_OREJ_RESV_AB2);
+ break;
+
+ case SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_3:
+
+ isci_request_set_open_reject_status(
+ request, task, response_ptr, status_ptr,
+ complete_to_host_ptr, SAS_OREJ_RESV_AB3);
+ break;
+
+ case SCU_TASK_OPEN_REJECT_BAD_DESTINATION:
+
+ isci_request_set_open_reject_status(
+ request, task, response_ptr, status_ptr,
+ complete_to_host_ptr, SAS_OREJ_BAD_DEST);
+ break;
+
+ case SCU_TASK_OPEN_REJECT_STP_RESOURCES_BUSY:
+
+ isci_request_set_open_reject_status(
+ request, task, response_ptr, status_ptr,
+ complete_to_host_ptr, SAS_OREJ_STP_NORES);
+ break;
+
+ case SCU_TASK_OPEN_REJECT_PROTOCOL_NOT_SUPPORTED:
+
+ isci_request_set_open_reject_status(
+ request, task, response_ptr, status_ptr,
+ complete_to_host_ptr, SAS_OREJ_EPROTO);
+ break;
+
+ case SCU_TASK_OPEN_REJECT_CONNECTION_RATE_NOT_SUPPORTED:
+
+ isci_request_set_open_reject_status(
+ request, task, response_ptr, status_ptr,
+ complete_to_host_ptr, SAS_OREJ_CONN_RATE);
+ break;
+
+ case SCU_TASK_DONE_LL_R_ERR:
+ /* Also SCU_TASK_DONE_ACK_NAK_TO: */
+ case SCU_TASK_DONE_LL_PERR:
+ case SCU_TASK_DONE_LL_SY_TERM:
+ /* Also SCU_TASK_DONE_NAK_ERR:*/
+ case SCU_TASK_DONE_LL_LF_TERM:
+ /* Also SCU_TASK_DONE_DATA_LEN_ERR: */
+ case SCU_TASK_DONE_LL_ABORT_ERR:
+ case SCU_TASK_DONE_SEQ_INV_TYPE:
+ /* Also SCU_TASK_DONE_UNEXP_XR: */
+ case SCU_TASK_DONE_XR_IU_LEN_ERR:
+ case SCU_TASK_DONE_INV_FIS_LEN:
+ /* Also SCU_TASK_DONE_XR_WD_LEN: */
+ case SCU_TASK_DONE_SDMA_ERR:
+ case SCU_TASK_DONE_OFFSET_ERR:
+ case SCU_TASK_DONE_MAX_PLD_ERR:
+ case SCU_TASK_DONE_LF_ERR:
+ case SCU_TASK_DONE_SMP_RESP_TO_ERR: /* Escalate to dev reset? */
+ case SCU_TASK_DONE_SMP_LL_RX_ERR:
+ case SCU_TASK_DONE_UNEXP_DATA:
+ case SCU_TASK_DONE_UNEXP_SDBFIS:
+ case SCU_TASK_DONE_REG_ERR:
+ case SCU_TASK_DONE_SDB_ERR:
+ case SCU_TASK_DONE_TASK_ABORT:
+ default:
+ /* Task in the target is not done. */
+ *response_ptr = SAS_TASK_UNDELIVERED;
+ *status_ptr = SAM_STAT_TASK_ABORTED;
+ request->complete_in_target = false;
+
+ *complete_to_host_ptr = isci_perform_error_io_completion;
+ break;
+ }
+}
+
+/**
+ * isci_task_save_for_upper_layer_completion() - This function saves the
+ * request for later completion to the upper layer driver.
+ * @host: This parameter is a pointer to the host on which the the request
+ * should be queued (either as an error or success).
+ * @request: This parameter is the completed request.
+ * @response: This parameter is the response code for the completed task.
+ * @status: This parameter is the status code for the completed task.
+ *
+ * none.
+ */
+static void isci_task_save_for_upper_layer_completion(
+ struct isci_host *host,
+ struct isci_request *request,
+ enum service_response response,
+ enum exec_status status,
+ enum isci_completion_selection task_notification_selection)
+{
+ struct sas_task *task = isci_request_access_task(request);
+
+ task_notification_selection
+ = isci_task_set_completion_status(task, response, status,
+ task_notification_selection);
+
+ /* Tasks aborted specifically by a call to the lldd_abort_task
+ * function should not be completed to the host in the regular path.
+ */
+ switch (task_notification_selection) {
+
+ case isci_perform_normal_io_completion:
+
+ /* Normal notification (task_done) */
+ dev_dbg(&host->pdev->dev,
+ "%s: Normal - task = %p, response=%d (%d), status=%d (%d)\n",
+ __func__,
+ task,
+ task->task_status.resp, response,
+ task->task_status.stat, status);
+ /* Add to the completed list. */
+ list_add(&request->completed_node,
+ &host->requests_to_complete);
+
+ /* Take the request off the device's pending request list. */
+ list_del_init(&request->dev_node);
+ break;
+
+ case isci_perform_aborted_io_completion:
+ /* No notification to libsas because this request is
+ * already in the abort path.
+ */
+ dev_warn(&host->pdev->dev,
+ "%s: Aborted - task = %p, response=%d (%d), status=%d (%d)\n",
+ __func__,
+ task,
+ task->task_status.resp, response,
+ task->task_status.stat, status);
+
+ /* Wake up whatever process was waiting for this
+ * request to complete.
+ */
+ WARN_ON(request->io_request_completion == NULL);
+
+ if (request->io_request_completion != NULL) {
+
+ /* Signal whoever is waiting that this
+ * request is complete.
+ */
+ complete(request->io_request_completion);
+ }
+ break;
+
+ case isci_perform_error_io_completion:
+ /* Use sas_task_abort */
+ dev_warn(&host->pdev->dev,
+ "%s: Error - task = %p, response=%d (%d), status=%d (%d)\n",
+ __func__,
+ task,
+ task->task_status.resp, response,
+ task->task_status.stat, status);
+ /* Add to the aborted list. */
+ list_add(&request->completed_node,
+ &host->requests_to_errorback);
+ break;
+
+ default:
+ dev_warn(&host->pdev->dev,
+ "%s: Unknown - task = %p, response=%d (%d), status=%d (%d)\n",
+ __func__,
+ task,
+ task->task_status.resp, response,
+ task->task_status.stat, status);
+
+ /* Add to the error to libsas list. */
+ list_add(&request->completed_node,
+ &host->requests_to_errorback);
+ break;
+ }
+}
+
+static void isci_request_io_request_complete(struct isci_host *isci_host,
+ struct isci_request *request,
+ enum sci_io_status completion_status)
+{
+ struct sas_task *task = isci_request_access_task(request);
+ struct ssp_response_iu *resp_iu;
+ void *resp_buf;
+ unsigned long task_flags;
+ struct isci_remote_device *isci_device = request->isci_device;
+ enum service_response response = SAS_TASK_UNDELIVERED;
+ enum exec_status status = SAS_ABORTED_TASK;
+ enum isci_request_status request_status;
+ enum isci_completion_selection complete_to_host
+ = isci_perform_normal_io_completion;
+
+ dev_dbg(&isci_host->pdev->dev,
+ "%s: request = %p, task = %p,\n"
+ "task->data_dir = %d completion_status = 0x%x\n",
+ __func__,
+ request,
+ task,
+ task->data_dir,
+ completion_status);
+
+ spin_lock(&request->state_lock);
+ request_status = isci_request_get_state(request);
+
+ /* Decode the request status. Note that if the request has been
+ * aborted by a task management function, we don't care
+ * what the status is.
+ */
+ switch (request_status) {
+
+ case aborted:
+ /* "aborted" indicates that the request was aborted by a task
+ * management function, since once a task management request is
+ * perfomed by the device, the request only completes because
+ * of the subsequent driver terminate.
+ *
+ * Aborted also means an external thread is explicitly managing
+ * this request, so that we do not complete it up the stack.
+ *
+ * The target is still there (since the TMF was successful).
+ */
+ request->complete_in_target = true;
+ response = SAS_TASK_COMPLETE;
+
+ /* See if the device has been/is being stopped. Note
+ * that we ignore the quiesce state, since we are
+ * concerned about the actual device state.
+ */
+ if ((isci_device->status == isci_stopping)
+ || (isci_device->status == isci_stopped)
+ )
+ status = SAS_DEVICE_UNKNOWN;
+ else
+ status = SAS_ABORTED_TASK;
+
+ complete_to_host = isci_perform_aborted_io_completion;
+ /* This was an aborted request. */
+
+ spin_unlock(&request->state_lock);
+ break;
+
+ case aborting:
+ /* aborting means that the task management function tried and
+ * failed to abort the request. We need to note the request
+ * as SAS_TASK_UNDELIVERED, so that the scsi mid layer marks the
+ * target as down.
+ *
+ * Aborting also means an external thread is explicitly managing
+ * this request, so that we do not complete it up the stack.
+ */
+ request->complete_in_target = true;
+ response = SAS_TASK_UNDELIVERED;
+
+ if ((isci_device->status == isci_stopping) ||
+ (isci_device->status == isci_stopped))
+ /* The device has been /is being stopped. Note that
+ * we ignore the quiesce state, since we are
+ * concerned about the actual device state.
+ */
+ status = SAS_DEVICE_UNKNOWN;
+ else
+ status = SAS_PHY_DOWN;
+
+ complete_to_host = isci_perform_aborted_io_completion;
+
+ /* This was an aborted request. */
+
+ spin_unlock(&request->state_lock);
+ break;
+
+ case terminating:
+
+ /* This was an terminated request. This happens when
+ * the I/O is being terminated because of an action on
+ * the device (reset, tear down, etc.), and the I/O needs
+ * to be completed up the stack.
+ */
+ request->complete_in_target = true;
+ response = SAS_TASK_UNDELIVERED;
+
+ /* See if the device has been/is being stopped. Note
+ * that we ignore the quiesce state, since we are
+ * concerned about the actual device state.
+ */
+ if ((isci_device->status == isci_stopping) ||
+ (isci_device->status == isci_stopped))
+ status = SAS_DEVICE_UNKNOWN;
+ else
+ status = SAS_ABORTED_TASK;
+
+ complete_to_host = isci_perform_aborted_io_completion;
+
+ /* This was a terminated request. */
+
+ spin_unlock(&request->state_lock);
+ break;
+
+ default:
+
+ /* The request is done from an SCU HW perspective. */
+ request->status = completed;
+
+ spin_unlock(&request->state_lock);
+
+ /* This is an active request being completed from the core. */
+ switch (completion_status) {
+
+ case SCI_IO_FAILURE_RESPONSE_VALID:
+ dev_dbg(&isci_host->pdev->dev,
+ "%s: SCI_IO_FAILURE_RESPONSE_VALID (%p/%p)\n",
+ __func__,
+ request,
+ task);
+
+ if (sas_protocol_ata(task->task_proto)) {
+ resp_buf = &request->sci.stp.rsp;
+ isci_request_process_stp_response(task,
+ resp_buf);
+ } else if (SAS_PROTOCOL_SSP == task->task_proto) {
+
+ /* crack the iu response buffer. */
+ resp_iu = &request->sci.ssp.rsp;
+ isci_request_process_response_iu(task, resp_iu,
+ &isci_host->pdev->dev);
+
+ } else if (SAS_PROTOCOL_SMP == task->task_proto) {
+
+ dev_err(&isci_host->pdev->dev,
+ "%s: SCI_IO_FAILURE_RESPONSE_VALID: "
+ "SAS_PROTOCOL_SMP protocol\n",
+ __func__);
+
+ } else
+ dev_err(&isci_host->pdev->dev,
+ "%s: unknown protocol\n", __func__);
+
+ /* use the task status set in the task struct by the
+ * isci_request_process_response_iu call.
+ */
+ request->complete_in_target = true;
+ response = task->task_status.resp;
+ status = task->task_status.stat;
+ break;
+
+ case SCI_IO_SUCCESS:
+ case SCI_IO_SUCCESS_IO_DONE_EARLY:
+
+ response = SAS_TASK_COMPLETE;
+ status = SAM_STAT_GOOD;
+ request->complete_in_target = true;
+
+ if (task->task_proto == SAS_PROTOCOL_SMP) {
+ void *rsp = &request->sci.smp.rsp;
+
+ dev_dbg(&isci_host->pdev->dev,
+ "%s: SMP protocol completion\n",
+ __func__);
+
+ sg_copy_from_buffer(
+ &task->smp_task.smp_resp, 1,
+ rsp, sizeof(struct smp_resp));
+ } else if (completion_status
+ == SCI_IO_SUCCESS_IO_DONE_EARLY) {
+
+ /* This was an SSP / STP / SATA transfer.
+ * There is a possibility that less data than
+ * the maximum was transferred.
+ */
+ u32 transferred_length = sci_req_tx_bytes(&request->sci);
+
+ task->task_status.residual
+ = task->total_xfer_len - transferred_length;
+
+ /* If there were residual bytes, call this an
+ * underrun.
+ */
+ if (task->task_status.residual != 0)
+ status = SAS_DATA_UNDERRUN;
+
+ dev_dbg(&isci_host->pdev->dev,
+ "%s: SCI_IO_SUCCESS_IO_DONE_EARLY %d\n",
+ __func__,
+ status);
+
+ } else
+ dev_dbg(&isci_host->pdev->dev,
+ "%s: SCI_IO_SUCCESS\n",
+ __func__);
+
+ break;
+
+ case SCI_IO_FAILURE_TERMINATED:
+ dev_dbg(&isci_host->pdev->dev,
+ "%s: SCI_IO_FAILURE_TERMINATED (%p/%p)\n",
+ __func__,
+ request,
+ task);
+
+ /* The request was terminated explicitly. No handling
+ * is needed in the SCSI error handler path.
+ */
+ request->complete_in_target = true;
+ response = SAS_TASK_UNDELIVERED;
+
+ /* See if the device has been/is being stopped. Note
+ * that we ignore the quiesce state, since we are
+ * concerned about the actual device state.
+ */
+ if ((isci_device->status == isci_stopping) ||
+ (isci_device->status == isci_stopped))
+ status = SAS_DEVICE_UNKNOWN;
+ else
+ status = SAS_ABORTED_TASK;
+
+ complete_to_host = isci_perform_normal_io_completion;
+ break;
+
+ case SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR:
+
+ isci_request_handle_controller_specific_errors(
+ isci_device, request, task, &response, &status,
+ &complete_to_host);
+
+ break;
+
+ case SCI_IO_FAILURE_REMOTE_DEVICE_RESET_REQUIRED:
+ /* This is a special case, in that the I/O completion
+ * is telling us that the device needs a reset.
+ * In order for the device reset condition to be
+ * noticed, the I/O has to be handled in the error
+ * handler. Set the reset flag and cause the
+ * SCSI error thread to be scheduled.
+ */
+ spin_lock_irqsave(&task->task_state_lock, task_flags);
+ task->task_state_flags |= SAS_TASK_NEED_DEV_RESET;
+ spin_unlock_irqrestore(&task->task_state_lock, task_flags);
+
+ /* Fail the I/O. */
+ response = SAS_TASK_UNDELIVERED;
+ status = SAM_STAT_TASK_ABORTED;
+
+ complete_to_host = isci_perform_error_io_completion;
+ request->complete_in_target = false;
+ break;
+
+ default:
+ /* Catch any otherwise unhandled error codes here. */
+ dev_warn(&isci_host->pdev->dev,
+ "%s: invalid completion code: 0x%x - "
+ "isci_request = %p\n",
+ __func__, completion_status, request);
+
+ response = SAS_TASK_UNDELIVERED;
+
+ /* See if the device has been/is being stopped. Note
+ * that we ignore the quiesce state, since we are
+ * concerned about the actual device state.
+ */
+ if ((isci_device->status == isci_stopping) ||
+ (isci_device->status == isci_stopped))
+ status = SAS_DEVICE_UNKNOWN;
+ else
+ status = SAS_ABORTED_TASK;
+
+ complete_to_host = isci_perform_error_io_completion;
+ request->complete_in_target = false;
+ break;
+ }
+ break;
+ }
+
+ isci_request_unmap_sgl(request, isci_host->pdev);
+
+ /* Put the completed request on the correct list */
+ isci_task_save_for_upper_layer_completion(isci_host, request, response,
+ status, complete_to_host
+ );
+
+ /* complete the io request to the core. */
+ scic_controller_complete_io(&isci_host->sci,
+ &isci_device->sci,
+ &request->sci);
+ /* set terminated handle so it cannot be completed or
+ * terminated again, and to cause any calls into abort
+ * task to recognize the already completed case.
+ */
+ request->terminated = true;
+
+ isci_host_can_dequeue(isci_host, 1);
+}
+
+/**
+ * scic_sds_request_initial_state_enter() -
+ * @object: This parameter specifies the base object for which the state
+ * transition is occurring.
+ *
+ * This method implements the actions taken when entering the
+ * SCI_BASE_REQUEST_STATE_INITIAL state. This state is entered when the initial
+ * base request is constructed. Entry into the initial state sets all handlers
+ * for the io request object to their default handlers. none
+ */
+static void scic_sds_request_initial_state_enter(void *object)
+{
+ struct scic_sds_request *sci_req = object;
+
+ SET_STATE_HANDLER(
+ sci_req,
+ scic_sds_request_state_handler_table,
+ SCI_BASE_REQUEST_STATE_INITIAL
+ );
+}
+
+/**
+ * scic_sds_request_constructed_state_enter() -
+ * @object: The io request object that is to enter the constructed state.
+ *
+ * This method implements the actions taken when entering the
+ * SCI_BASE_REQUEST_STATE_CONSTRUCTED state. The method sets the state handlers
+ * for the the constructed state. none
+ */
+static void scic_sds_request_constructed_state_enter(void *object)
+{
+ struct scic_sds_request *sci_req = object;
+
+ SET_STATE_HANDLER(
+ sci_req,
+ scic_sds_request_state_handler_table,
+ SCI_BASE_REQUEST_STATE_CONSTRUCTED
+ );
+}
+
+/**
+ * scic_sds_request_started_state_enter() -
+ * @object: This parameter specifies the base object for which the state
+ * transition is occurring. This is cast into a SCIC_SDS_IO_REQUEST object.
+ *
+ * This method implements the actions taken when entering the
+ * SCI_BASE_REQUEST_STATE_STARTED state. If the io request object type is a
+ * SCSI Task request we must enter the started substate machine. none
+ */
+static void scic_sds_request_started_state_enter(void *object)
+{
+ struct scic_sds_request *sci_req = object;
+ struct sci_base_state_machine *sm = &sci_req->state_machine;
+ struct isci_request *ireq = sci_req_to_ireq(sci_req);
+ struct domain_device *dev = sci_dev_to_domain(sci_req->target_device);
+ struct sas_task *task;
+
+ /* XXX as hch said always creating an internal sas_task for tmf
+ * requests would simplify the driver
+ */
+ task = ireq->ttype == io_task ? isci_request_access_task(ireq) : NULL;
+
+ SET_STATE_HANDLER(
+ sci_req,
+ scic_sds_request_state_handler_table,
+ SCI_BASE_REQUEST_STATE_STARTED
+ );
+
+ /* Most of the request state machines have a started substate machine so
+ * start its execution on the entry to the started state.
+ */
+ if (sci_req->has_started_substate_machine == true)
+ sci_base_state_machine_start(&sci_req->started_substate_machine);
+
+ if (!task && dev->dev_type == SAS_END_DEV) {
+ sci_base_state_machine_change_state(sm,
+ SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_COMPLETION);
+ } else if (task && task->task_proto == SAS_PROTOCOL_SMP) {
+ sci_base_state_machine_change_state(sm,
+ SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_RESPONSE);
+ }
+}
+
+/**
+ * scic_sds_request_started_state_exit() -
+ * @object: This parameter specifies the base object for which the state
+ * transition is occurring. This object is cast into a SCIC_SDS_IO_REQUEST
+ * object.
+ *
+ * This method implements the actions taken when exiting the
+ * SCI_BASE_REQUEST_STATE_STARTED state. For task requests the action will be
+ * to stop the started substate machine. none
+ */
+static void scic_sds_request_started_state_exit(void *object)
+{
+ struct scic_sds_request *sci_req = object;
+
+ if (sci_req->has_started_substate_machine == true)
+ sci_base_state_machine_stop(&sci_req->started_substate_machine);
+}
+
+/**
+ * scic_sds_request_completed_state_enter() -
+ * @object: This parameter specifies the base object for which the state
+ * transition is occurring. This object is cast into a SCIC_SDS_IO_REQUEST
+ * object.
+ *
+ * This method implements the actions taken when entering the
+ * SCI_BASE_REQUEST_STATE_COMPLETED state. This state is entered when the
+ * SCIC_SDS_IO_REQUEST has completed. The method will decode the request
+ * completion status and convert it to an enum sci_status to return in the
+ * completion callback function. none
+ */
+static void scic_sds_request_completed_state_enter(void *object)
+{
+ struct scic_sds_request *sci_req = object;
+ struct scic_sds_controller *scic =
+ scic_sds_request_get_controller(sci_req);
+ struct isci_host *ihost = scic_to_ihost(scic);
+ struct isci_request *ireq = sci_req_to_ireq(sci_req);
+
+ SET_STATE_HANDLER(sci_req,
+ scic_sds_request_state_handler_table,
+ SCI_BASE_REQUEST_STATE_COMPLETED);
+
+ /* Tell the SCI_USER that the IO request is complete */
+ if (sci_req->is_task_management_request == false)
+ isci_request_io_request_complete(ihost, ireq,
+ sci_req->sci_status);
+ else
+ isci_task_request_complete(ihost, ireq, sci_req->sci_status);
+}
+
+/**
+ * scic_sds_request_aborting_state_enter() -
+ * @object: This parameter specifies the base object for which the state
+ * transition is occurring. This object is cast into a SCIC_SDS_IO_REQUEST
+ * object.
+ *
+ * This method implements the actions taken when entering the
+ * SCI_BASE_REQUEST_STATE_ABORTING state. none
+ */
+static void scic_sds_request_aborting_state_enter(void *object)
+{
+ struct scic_sds_request *sci_req = object;
+
+ /* Setting the abort bit in the Task Context is required by the silicon. */
+ sci_req->task_context_buffer->abort = 1;
+
+ SET_STATE_HANDLER(
+ sci_req,
+ scic_sds_request_state_handler_table,
+ SCI_BASE_REQUEST_STATE_ABORTING
+ );
+}
+
+/**
+ * scic_sds_request_final_state_enter() -
+ * @object: This parameter specifies the base object for which the state
+ * transition is occurring. This is cast into a SCIC_SDS_IO_REQUEST object.
+ *
+ * This method implements the actions taken when entering the
+ * SCI_BASE_REQUEST_STATE_FINAL state. The only action required is to put the
+ * state handlers in place. none
+ */
+static void scic_sds_request_final_state_enter(void *object)
+{
+ struct scic_sds_request *sci_req = object;
+
+ SET_STATE_HANDLER(
+ sci_req,
+ scic_sds_request_state_handler_table,
+ SCI_BASE_REQUEST_STATE_FINAL
+ );
+}
+
+static void scic_sds_io_request_started_task_mgmt_await_tc_completion_substate_enter(
+ void *object)
+{
+ struct scic_sds_request *sci_req = object;
+
+ SET_STATE_HANDLER(
+ sci_req,
+ scic_sds_request_state_handler_table,
+ SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_COMPLETION
+ );
+}
+
+static void scic_sds_io_request_started_task_mgmt_await_task_response_substate_enter(
+ void *object)
+{
+ struct scic_sds_request *sci_req = object;
+
+ SET_STATE_HANDLER(
+ sci_req,
+ scic_sds_request_state_handler_table,
+ SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE
+ );
+}
+
+static void scic_sds_smp_request_started_await_response_substate_enter(void *object)
+{
+ struct scic_sds_request *sci_req = object;
+
+ SET_STATE_HANDLER(
+ sci_req,
+ scic_sds_request_state_handler_table,
+ SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_RESPONSE
+ );
+}
+
+static void scic_sds_smp_request_started_await_tc_completion_substate_enter(void *object)
+{
+ struct scic_sds_request *sci_req = object;
+
+ SET_STATE_HANDLER(
+ sci_req,
+ scic_sds_request_state_handler_table,
+ SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_TC_COMPLETION
+ );
+}
+
+static const struct sci_base_state scic_sds_request_state_table[] = {
+ [SCI_BASE_REQUEST_STATE_INITIAL] = {
+ .enter_state = scic_sds_request_initial_state_enter,
+ },
+ [SCI_BASE_REQUEST_STATE_CONSTRUCTED] = {
+ .enter_state = scic_sds_request_constructed_state_enter,
+ },
+ [SCI_BASE_REQUEST_STATE_STARTED] = {
+ .enter_state = scic_sds_request_started_state_enter,
+ .exit_state = scic_sds_request_started_state_exit
+ },
+ [SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_COMPLETION] = {
+ .enter_state = scic_sds_io_request_started_task_mgmt_await_tc_completion_substate_enter,
+ },
+ [SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE] = {
+ .enter_state = scic_sds_io_request_started_task_mgmt_await_task_response_substate_enter,
+ },
+ [SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_RESPONSE] = {
+ .enter_state = scic_sds_smp_request_started_await_response_substate_enter,
+ },
+ [SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_TC_COMPLETION] = {
+ .enter_state = scic_sds_smp_request_started_await_tc_completion_substate_enter,
+ },
+ [SCI_BASE_REQUEST_STATE_COMPLETED] = {
+ .enter_state = scic_sds_request_completed_state_enter,
+ },
+ [SCI_BASE_REQUEST_STATE_ABORTING] = {
+ .enter_state = scic_sds_request_aborting_state_enter,
+ },
+ [SCI_BASE_REQUEST_STATE_FINAL] = {
+ .enter_state = scic_sds_request_final_state_enter,
+ },
+};
+
+static void scic_sds_general_request_construct(struct scic_sds_controller *scic,
+ struct scic_sds_remote_device *sci_dev,
+ u16 io_tag, struct scic_sds_request *sci_req)
+{
+ sci_base_state_machine_construct(&sci_req->state_machine, sci_req,
+ scic_sds_request_state_table, SCI_BASE_REQUEST_STATE_INITIAL);
+ sci_base_state_machine_start(&sci_req->state_machine);
+
+ sci_req->io_tag = io_tag;
+ sci_req->owning_controller = scic;
+ sci_req->target_device = sci_dev;
+ sci_req->has_started_substate_machine = false;
+ sci_req->protocol = SCIC_NO_PROTOCOL;
+ sci_req->saved_rx_frame_index = SCU_INVALID_FRAME_INDEX;
+ sci_req->device_sequence = scic_sds_remote_device_get_sequence(sci_dev);
+
+ sci_req->sci_status = SCI_SUCCESS;
+ sci_req->scu_status = 0;
+ sci_req->post_context = 0xFFFFFFFF;
+
+ sci_req->is_task_management_request = false;
+
+ if (io_tag == SCI_CONTROLLER_INVALID_IO_TAG) {
+ sci_req->was_tag_assigned_by_user = false;
+ sci_req->task_context_buffer = &sci_req->tc;
+ } else {
+ sci_req->was_tag_assigned_by_user = true;
+
+ sci_req->task_context_buffer =
+ scic_sds_controller_get_task_context_buffer(scic, io_tag);
+ }
+}
- spin_unlock(&request->state_lock);
- break;
+static enum sci_status
+scic_io_request_construct(struct scic_sds_controller *scic,
+ struct scic_sds_remote_device *sci_dev,
+ u16 io_tag, struct scic_sds_request *sci_req)
+{
+ struct domain_device *dev = sci_dev_to_domain(sci_dev);
+ enum sci_status status = SCI_SUCCESS;
- case aborting:
- /* aborting means that the task management function tried and
- * failed to abort the request. We need to note the request
- * as SAS_TASK_UNDELIVERED, so that the scsi mid layer marks the
- * target as down.
- *
- * Aborting also means an external thread is explicitly managing
- * this request, so that we do not complete it up the stack.
- */
- request->complete_in_target = true;
- response = SAS_TASK_UNDELIVERED;
+ /* Build the common part of the request */
+ scic_sds_general_request_construct(scic, sci_dev, io_tag, sci_req);
- if ((isci_device->status == isci_stopping) ||
- (isci_device->status == isci_stopped))
- /* The device has been /is being stopped. Note that
- * we ignore the quiesce state, since we are
- * concerned about the actual device state.
- */
- status = SAS_DEVICE_UNKNOWN;
- else
- status = SAS_PHY_DOWN;
+ if (sci_dev->rnc.remote_node_index == SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX)
+ return SCI_FAILURE_INVALID_REMOTE_DEVICE;
- complete_to_host = isci_perform_aborted_io_completion;
+ if (dev->dev_type == SAS_END_DEV)
+ /* pass */;
+ else if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP))
+ memset(&sci_req->stp.cmd, 0, sizeof(sci_req->stp.cmd));
+ else if (dev_is_expander(dev))
+ memset(&sci_req->smp.cmd, 0, sizeof(sci_req->smp.cmd));
+ else
+ return SCI_FAILURE_UNSUPPORTED_PROTOCOL;
- /* This was an aborted request. */
+ memset(sci_req->task_context_buffer, 0,
+ offsetof(struct scu_task_context, sgl_pair_ab));
- spin_unlock(&request->state_lock);
- break;
+ return status;
+}
- case terminating:
+enum sci_status scic_task_request_construct(struct scic_sds_controller *scic,
+ struct scic_sds_remote_device *sci_dev,
+ u16 io_tag, struct scic_sds_request *sci_req)
+{
+ struct domain_device *dev = sci_dev_to_domain(sci_dev);
+ enum sci_status status = SCI_SUCCESS;
- /* This was an terminated request. This happens when
- * the I/O is being terminated because of an action on
- * the device (reset, tear down, etc.), and the I/O needs
- * to be completed up the stack.
- */
- request->complete_in_target = true;
- response = SAS_TASK_UNDELIVERED;
+ /* Build the common part of the request */
+ scic_sds_general_request_construct(scic, sci_dev, io_tag, sci_req);
- /* See if the device has been/is being stopped. Note
- * that we ignore the quiesce state, since we are
- * concerned about the actual device state.
- */
- if ((isci_device->status == isci_stopping) ||
- (isci_device->status == isci_stopped))
- status = SAS_DEVICE_UNKNOWN;
- else
- status = SAS_ABORTED_TASK;
+ if (dev->dev_type == SAS_END_DEV ||
+ dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) {
+ sci_req->is_task_management_request = true;
+ memset(sci_req->task_context_buffer, 0, sizeof(struct scu_task_context));
+ } else
+ status = SCI_FAILURE_UNSUPPORTED_PROTOCOL;
- complete_to_host = isci_perform_aborted_io_completion;
+ return status;
+}
- /* This was a terminated request. */
+static enum sci_status isci_request_ssp_request_construct(
+ struct isci_request *request)
+{
+ enum sci_status status;
- spin_unlock(&request->state_lock);
- break;
+ dev_dbg(&request->isci_host->pdev->dev,
+ "%s: request = %p\n",
+ __func__,
+ request);
+ status = scic_io_request_construct_basic_ssp(&request->sci);
+ return status;
+}
- default:
+static enum sci_status isci_request_stp_request_construct(
+ struct isci_request *request)
+{
+ struct sas_task *task = isci_request_access_task(request);
+ enum sci_status status;
+ struct host_to_dev_fis *register_fis;
- /* The request is done from an SCU HW perspective. */
- request->status = completed;
+ dev_dbg(&request->isci_host->pdev->dev,
+ "%s: request = %p\n",
+ __func__,
+ request);
- spin_unlock(&request->state_lock);
+ /* Get the host_to_dev_fis from the core and copy
+ * the fis from the task into it.
+ */
+ register_fis = isci_sata_task_to_fis_copy(task);
- /* This is an active request being completed from the core. */
- switch (completion_status) {
+ status = scic_io_request_construct_basic_sata(&request->sci);
- case SCI_IO_FAILURE_RESPONSE_VALID:
- dev_dbg(&isci_host->pdev->dev,
- "%s: SCI_IO_FAILURE_RESPONSE_VALID (%p/%p)\n",
- __func__,
- request,
- task);
+ /* Set the ncq tag in the fis, from the queue
+ * command in the task.
+ */
+ if (isci_sata_is_task_ncq(task)) {
- if (sas_protocol_ata(task->task_proto)) {
- resp_buf
- = scic_stp_io_request_get_d2h_reg_address(
- request->sci_request_handle
- );
- isci_request_process_stp_response(task,
- resp_buf
- );
+ isci_sata_set_ncq_tag(
+ register_fis,
+ task
+ );
+ }
- } else if (SAS_PROTOCOL_SSP == task->task_proto) {
+ return status;
+}
- /* crack the iu response buffer. */
- resp_iu
- = scic_io_request_get_response_iu_address(
- request->sci_request_handle
- );
+/*
+ * This function will fill in the SCU Task Context for a SMP request. The
+ * following important settings are utilized: -# task_type ==
+ * SCU_TASK_TYPE_SMP. This simply indicates that a normal request type
+ * (i.e. non-raw frame) is being utilized to perform task management. -#
+ * control_frame == 1. This ensures that the proper endianess is set so
+ * that the bytes are transmitted in the right order for a smp request frame.
+ * @sci_req: This parameter specifies the smp request object being
+ * constructed.
+ *
+ */
+static void
+scu_smp_request_construct_task_context(struct scic_sds_request *sci_req,
+ struct smp_req *smp_req)
+{
+ dma_addr_t dma_addr;
+ struct scic_sds_controller *scic;
+ struct scic_sds_remote_device *sci_dev;
+ struct scic_sds_port *sci_port;
+ struct scu_task_context *task_context;
+ ssize_t word_cnt = sizeof(struct smp_req) / sizeof(u32);
+
+ /* byte swap the smp request. */
+ sci_swab32_cpy(&sci_req->smp.cmd, smp_req,
+ word_cnt);
+
+ task_context = scic_sds_request_get_task_context(sci_req);
+
+ scic = scic_sds_request_get_controller(sci_req);
+ sci_dev = scic_sds_request_get_device(sci_req);
+ sci_port = scic_sds_request_get_port(sci_req);
+
+ /*
+ * Fill in the TC with the its required data
+ * 00h
+ */
+ task_context->priority = 0;
+ task_context->initiator_request = 1;
+ task_context->connection_rate = sci_dev->connection_rate;
+ task_context->protocol_engine_index =
+ scic_sds_controller_get_protocol_engine_group(scic);
+ task_context->logical_port_index = scic_sds_port_get_index(sci_port);
+ task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_SMP;
+ task_context->abort = 0;
+ task_context->valid = SCU_TASK_CONTEXT_VALID;
+ task_context->context_type = SCU_TASK_CONTEXT_TYPE;
+
+ /* 04h */
+ task_context->remote_node_index = sci_dev->rnc.remote_node_index;
+ task_context->command_code = 0;
+ task_context->task_type = SCU_TASK_TYPE_SMP_REQUEST;
+
+ /* 08h */
+ task_context->link_layer_control = 0;
+ task_context->do_not_dma_ssp_good_response = 1;
+ task_context->strict_ordering = 0;
+ task_context->control_frame = 1;
+ task_context->timeout_enable = 0;
+ task_context->block_guard_enable = 0;
+
+ /* 0ch */
+ task_context->address_modifier = 0;
+
+ /* 10h */
+ task_context->ssp_command_iu_length = smp_req->req_len;
+
+ /* 14h */
+ task_context->transfer_length_bytes = 0;
+
+ /*
+ * 18h ~ 30h, protocol specific
+ * since commandIU has been build by framework at this point, we just
+ * copy the frist DWord from command IU to this location. */
+ memcpy(&task_context->type.smp, &sci_req->smp.cmd, sizeof(u32));
+
+ /*
+ * 40h
+ * "For SMP you could program it to zero. We would prefer that way
+ * so that done code will be consistent." - Venki
+ */
+ task_context->task_phase = 0;
- isci_request_process_response_iu(task, resp_iu,
- &isci_host->pdev->dev
- );
+ if (sci_req->was_tag_assigned_by_user) {
+ /*
+ * Build the task context now since we have already read
+ * the data
+ */
+ sci_req->post_context =
+ (SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
+ (scic_sds_controller_get_protocol_engine_group(scic) <<
+ SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) |
+ (scic_sds_port_get_index(sci_port) <<
+ SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) |
+ scic_sds_io_tag_get_index(sci_req->io_tag));
+ } else {
+ /*
+ * Build the task context now since we have already read
+ * the data.
+ * I/O tag index is not assigned because we have to wait
+ * until we get a TCi.
+ */
+ sci_req->post_context =
+ (SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
+ (scic_sds_controller_get_protocol_engine_group(scic) <<
+ SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) |
+ (scic_sds_port_get_index(sci_port) <<
+ SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT));
+ }
- } else if (SAS_PROTOCOL_SMP == task->task_proto) {
+ /*
+ * Copy the physical address for the command buffer to the SCU Task
+ * Context command buffer should not contain command header.
+ */
+ dma_addr = scic_io_request_get_dma_addr(sci_req,
+ ((char *) &sci_req->smp.cmd) +
+ sizeof(u32));
- dev_err(&isci_host->pdev->dev,
- "%s: SCI_IO_FAILURE_RESPONSE_VALID: "
- "SAS_PROTOCOL_SMP protocol\n",
- __func__);
+ task_context->command_iu_upper = upper_32_bits(dma_addr);
+ task_context->command_iu_lower = lower_32_bits(dma_addr);
- } else
- dev_err(&isci_host->pdev->dev,
- "%s: unknown protocol\n", __func__);
+ /* SMP response comes as UF, so no need to set response IU address. */
+ task_context->response_iu_upper = 0;
+ task_context->response_iu_lower = 0;
+}
- /* use the task status set in the task struct by the
- * isci_request_process_response_iu call.
- */
- request->complete_in_target = true;
- response = task->task_status.resp;
- status = task->task_status.stat;
+static enum sci_status scic_io_request_construct_smp(struct scic_sds_request *sci_req)
+{
+ struct smp_req *smp_req = kmalloc(sizeof(*smp_req), GFP_KERNEL);
+
+ if (!smp_req)
+ return SCI_FAILURE_INSUFFICIENT_RESOURCES;
+
+ sci_req->protocol = SCIC_SMP_PROTOCOL;
+
+ /* Construct the SMP SCU Task Context */
+ memcpy(smp_req, &sci_req->smp.cmd, sizeof(*smp_req));
+
+ /*
+ * Look at the SMP requests' header fields; for certain SAS 1.x SMP
+ * functions under SAS 2.0, a zero request length really indicates
+ * a non-zero default length. */
+ if (smp_req->req_len == 0) {
+ switch (smp_req->func) {
+ case SMP_DISCOVER:
+ case SMP_REPORT_PHY_ERR_LOG:
+ case SMP_REPORT_PHY_SATA:
+ case SMP_REPORT_ROUTE_INFO:
+ smp_req->req_len = 2;
+ break;
+ case SMP_CONF_ROUTE_INFO:
+ case SMP_PHY_CONTROL:
+ case SMP_PHY_TEST_FUNCTION:
+ smp_req->req_len = 9;
break;
+ /* Default - zero is a valid default for 2.0. */
+ }
+ }
- case SCI_IO_SUCCESS:
- case SCI_IO_SUCCESS_IO_DONE_EARLY:
+ scu_smp_request_construct_task_context(sci_req, smp_req);
- response = SAS_TASK_COMPLETE;
- status = SAM_STAT_GOOD;
- request->complete_in_target = true;
+ sci_base_state_machine_change_state(&sci_req->state_machine,
+ SCI_BASE_REQUEST_STATE_CONSTRUCTED);
- if (task->task_proto == SAS_PROTOCOL_SMP) {
+ kfree(smp_req);
- u8 *command_iu_address
- = scic_io_request_get_command_iu_address(
- request->sci_request_handle
- );
+ return SCI_SUCCESS;
+}
- dev_dbg(&isci_host->pdev->dev,
- "%s: SMP protocol completion\n",
- __func__);
+/*
+ * isci_smp_request_build() - This function builds the smp request.
+ * @ireq: This parameter points to the isci_request allocated in the
+ * request construct function.
+ *
+ * SCI_SUCCESS on successfull completion, or specific failure code.
+ */
+static enum sci_status isci_smp_request_build(struct isci_request *ireq)
+{
+ enum sci_status status = SCI_FAILURE;
+ struct sas_task *task = isci_request_access_task(ireq);
+ struct scic_sds_request *sci_req = &ireq->sci;
- sg_copy_from_buffer(
- &task->smp_task.smp_resp, 1,
- command_iu_address
- + sizeof(struct smp_req),
- sizeof(struct smp_resp));
- } else if (completion_status
- == SCI_IO_SUCCESS_IO_DONE_EARLY) {
+ dev_dbg(&ireq->isci_host->pdev->dev,
+ "%s: request = %p\n", __func__, ireq);
- /* This was an SSP / STP / SATA transfer.
- * There is a possibility that less data than
- * the maximum was transferred.
- */
- u32 transferred_length
- = scic_io_request_get_number_of_bytes_transferred(
- request->sci_request_handle);
+ dev_dbg(&ireq->isci_host->pdev->dev,
+ "%s: smp_req len = %d\n",
+ __func__,
+ task->smp_task.smp_req.length);
- task->task_status.residual
- = task->total_xfer_len - transferred_length;
+ /* copy the smp_command to the address; */
+ sg_copy_to_buffer(&task->smp_task.smp_req, 1,
+ &sci_req->smp.cmd,
+ sizeof(struct smp_req));
- /* If there were residual bytes, call this an
- * underrun.
- */
- if (task->task_status.residual != 0)
- status = SAS_DATA_UNDERRUN;
+ status = scic_io_request_construct_smp(sci_req);
+ if (status != SCI_SUCCESS)
+ dev_warn(&ireq->isci_host->pdev->dev,
+ "%s: failed with status = %d\n",
+ __func__,
+ status);
- dev_dbg(&isci_host->pdev->dev,
- "%s: SCI_IO_SUCCESS_IO_DONE_EARLY %d\n",
- __func__,
- status);
+ return status;
+}
- } else
- dev_dbg(&isci_host->pdev->dev,
- "%s: SCI_IO_SUCCESS\n",
- __func__);
+/**
+ * isci_io_request_build() - This function builds the io request object.
+ * @isci_host: This parameter specifies the ISCI host object
+ * @request: This parameter points to the isci_request object allocated in the
+ * request construct function.
+ * @sci_device: This parameter is the handle for the sci core's remote device
+ * object that is the destination for this request.
+ *
+ * SCI_SUCCESS on successfull completion, or specific failure code.
+ */
+static enum sci_status isci_io_request_build(
+ struct isci_host *isci_host,
+ struct isci_request *request,
+ struct isci_remote_device *isci_device)
+{
+ enum sci_status status = SCI_SUCCESS;
+ struct sas_task *task = isci_request_access_task(request);
+ struct scic_sds_remote_device *sci_device = &isci_device->sci;
- break;
+ dev_dbg(&isci_host->pdev->dev,
+ "%s: isci_device = 0x%p; request = %p, "
+ "num_scatter = %d\n",
+ __func__,
+ isci_device,
+ request,
+ task->num_scatter);
- case SCI_IO_FAILURE_TERMINATED:
- dev_dbg(&isci_host->pdev->dev,
- "%s: SCI_IO_FAILURE_TERMINATED (%p/%p)\n",
- __func__,
- request,
- task);
+ /* map the sgl addresses, if present.
+ * libata does the mapping for sata devices
+ * before we get the request.
+ */
+ if (task->num_scatter &&
+ !sas_protocol_ata(task->task_proto) &&
+ !(SAS_PROTOCOL_SMP & task->task_proto)) {
- /* The request was terminated explicitly. No handling
- * is needed in the SCSI error handler path.
- */
- request->complete_in_target = true;
- response = SAS_TASK_UNDELIVERED;
+ request->num_sg_entries = dma_map_sg(
+ &isci_host->pdev->dev,
+ task->scatter,
+ task->num_scatter,
+ task->data_dir
+ );
+
+ if (request->num_sg_entries == 0)
+ return SCI_FAILURE_INSUFFICIENT_RESOURCES;
+ }
- /* See if the device has been/is being stopped. Note
- * that we ignore the quiesce state, since we are
- * concerned about the actual device state.
- */
- if ((isci_device->status == isci_stopping) ||
- (isci_device->status == isci_stopped))
- status = SAS_DEVICE_UNKNOWN;
- else
- status = SAS_ABORTED_TASK;
+ /* build the common request object. For now,
+ * we will let the core allocate the IO tag.
+ */
+ status = scic_io_request_construct(&isci_host->sci, sci_device,
+ SCI_CONTROLLER_INVALID_IO_TAG,
+ &request->sci);
- complete_to_host = isci_perform_normal_io_completion;
- break;
+ if (status != SCI_SUCCESS) {
+ dev_warn(&isci_host->pdev->dev,
+ "%s: failed request construct\n",
+ __func__);
+ return SCI_FAILURE;
+ }
- case SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR:
+ switch (task->task_proto) {
+ case SAS_PROTOCOL_SMP:
+ status = isci_smp_request_build(request);
+ break;
+ case SAS_PROTOCOL_SSP:
+ status = isci_request_ssp_request_construct(request);
+ break;
+ case SAS_PROTOCOL_SATA:
+ case SAS_PROTOCOL_STP:
+ case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
+ status = isci_request_stp_request_construct(request);
+ break;
+ default:
+ dev_warn(&isci_host->pdev->dev,
+ "%s: unknown protocol\n", __func__);
+ return SCI_FAILURE;
+ }
- isci_request_handle_controller_specific_errors(
- isci_device, request, task, &response, &status,
- &complete_to_host);
+ return SCI_SUCCESS;
+}
- break;
+/**
+ * isci_request_alloc_core() - This function gets the request object from the
+ * isci_host dma cache.
+ * @isci_host: This parameter specifies the ISCI host object
+ * @isci_request: This parameter will contain the pointer to the new
+ * isci_request object.
+ * @isci_device: This parameter is the pointer to the isci remote device object
+ * that is the destination for this request.
+ * @gfp_flags: This parameter specifies the os allocation flags.
+ *
+ * SCI_SUCCESS on successfull completion, or specific failure code.
+ */
+static int isci_request_alloc_core(
+ struct isci_host *isci_host,
+ struct isci_request **isci_request,
+ struct isci_remote_device *isci_device,
+ gfp_t gfp_flags)
+{
+ int ret = 0;
+ dma_addr_t handle;
+ struct isci_request *request;
- case SCI_IO_FAILURE_REMOTE_DEVICE_RESET_REQUIRED:
- /* This is a special case, in that the I/O completion
- * is telling us that the device needs a reset.
- * In order for the device reset condition to be
- * noticed, the I/O has to be handled in the error
- * handler. Set the reset flag and cause the
- * SCSI error thread to be scheduled.
- */
- spin_lock_irqsave(&task->task_state_lock, task_flags);
- task->task_state_flags |= SAS_TASK_NEED_DEV_RESET;
- spin_unlock_irqrestore(&task->task_state_lock, task_flags);
- /* Fail the I/O. */
- response = SAS_TASK_UNDELIVERED;
- status = SAM_STAT_TASK_ABORTED;
+ /* get pointer to dma memory. This actually points
+ * to both the isci_remote_device object and the
+ * sci object. The isci object is at the beginning
+ * of the memory allocated here.
+ */
+ request = dma_pool_alloc(isci_host->dma_pool, gfp_flags, &handle);
+ if (!request) {
+ dev_warn(&isci_host->pdev->dev,
+ "%s: dma_pool_alloc returned NULL\n", __func__);
+ return -ENOMEM;
+ }
- complete_to_host = isci_perform_error_io_completion;
- request->complete_in_target = false;
- break;
+ /* initialize the request object. */
+ spin_lock_init(&request->state_lock);
+ request->request_daddr = handle;
+ request->isci_host = isci_host;
+ request->isci_device = isci_device;
+ request->io_request_completion = NULL;
+ request->terminated = false;
- default:
- /* Catch any otherwise unhandled error codes here. */
- dev_warn(&isci_host->pdev->dev,
- "%s: invalid completion code: 0x%x - "
- "isci_request = %p\n",
- __func__, completion_status, request);
+ request->num_sg_entries = 0;
- response = SAS_TASK_UNDELIVERED;
+ request->complete_in_target = false;
- /* See if the device has been/is being stopped. Note
- * that we ignore the quiesce state, since we are
- * concerned about the actual device state.
- */
- if ((isci_device->status == isci_stopping) ||
- (isci_device->status == isci_stopped))
- status = SAS_DEVICE_UNKNOWN;
- else
- status = SAS_ABORTED_TASK;
+ INIT_LIST_HEAD(&request->completed_node);
+ INIT_LIST_HEAD(&request->dev_node);
- complete_to_host = isci_perform_error_io_completion;
- request->complete_in_target = false;
- break;
- }
- break;
- }
+ *isci_request = request;
+ isci_request_change_state(request, allocated);
- isci_request_unmap_sgl(request, isci_host->pdev);
+ return ret;
+}
- /* Put the completed request on the correct list */
- isci_task_save_for_upper_layer_completion(isci_host, request, response,
- status, complete_to_host
- );
+static int isci_request_alloc_io(
+ struct isci_host *isci_host,
+ struct sas_task *task,
+ struct isci_request **isci_request,
+ struct isci_remote_device *isci_device,
+ gfp_t gfp_flags)
+{
+ int retval = isci_request_alloc_core(isci_host, isci_request,
+ isci_device, gfp_flags);
- /* complete the io request to the core. */
- scic_controller_complete_io(isci_host->core_controller,
- &isci_device->sci,
- request->sci_request_handle);
- /* NULL the request handle so it cannot be completed or
- * terminated again, and to cause any calls into abort
- * task to recognize the already completed case.
- */
- request->sci_request_handle = NULL;
+ if (!retval) {
+ (*isci_request)->ttype_ptr.io_task_ptr = task;
+ (*isci_request)->ttype = io_task;
- isci_host_can_dequeue(isci_host, 1);
+ task->lldd_task = *isci_request;
+ }
+ return retval;
}
/**
- * isci_request_io_request_get_transfer_length() - This function is called by
- * the sci core to retrieve the transfer length for a given request.
- * @request: This parameter is the isci_request object.
+ * isci_request_alloc_tmf() - This function gets the request object from the
+ * isci_host dma cache and initializes the relevant fields as a sas_task.
+ * @isci_host: This parameter specifies the ISCI host object
+ * @sas_task: This parameter is the task struct from the upper layer driver.
+ * @isci_request: This parameter will contain the pointer to the new
+ * isci_request object.
+ * @isci_device: This parameter is the pointer to the isci remote device object
+ * that is the destination for this request.
+ * @gfp_flags: This parameter specifies the os allocation flags.
*
- * length of transfer for specified request.
+ * SCI_SUCCESS on successfull completion, or specific failure code.
*/
-u32 isci_request_io_request_get_transfer_length(struct isci_request *request)
+int isci_request_alloc_tmf(
+ struct isci_host *isci_host,
+ struct isci_tmf *isci_tmf,
+ struct isci_request **isci_request,
+ struct isci_remote_device *isci_device,
+ gfp_t gfp_flags)
{
- struct sas_task *task = isci_request_access_task(request);
+ int retval = isci_request_alloc_core(isci_host, isci_request,
+ isci_device, gfp_flags);
- dev_dbg(&request->isci_host->pdev->dev,
- "%s: total_xfer_len: %d\n",
- __func__,
- task->total_xfer_len);
- return task->total_xfer_len;
-}
+ if (!retval) {
+ (*isci_request)->ttype_ptr.tmf_task_ptr = isci_tmf;
+ (*isci_request)->ttype = tmf_task;
+ }
+ return retval;
+}
/**
- * isci_request_io_request_get_data_direction() - This function is called by
- * the sci core to retrieve the data direction for a given request.
- * @request: This parameter is the isci_request object.
+ * isci_request_execute() - This function allocates the isci_request object,
+ * all fills in some common fields.
+ * @isci_host: This parameter specifies the ISCI host object
+ * @sas_task: This parameter is the task struct from the upper layer driver.
+ * @isci_request: This parameter will contain the pointer to the new
+ * isci_request object.
+ * @gfp_flags: This parameter specifies the os allocation flags.
*
- * data direction for specified request.
+ * SCI_SUCCESS on successfull completion, or specific failure code.
*/
-enum dma_data_direction isci_request_io_request_get_data_direction(
- struct isci_request *request)
+int isci_request_execute(
+ struct isci_host *isci_host,
+ struct sas_task *task,
+ struct isci_request **isci_request,
+ gfp_t gfp_flags)
{
- struct sas_task *task = isci_request_access_task(request);
+ int ret = 0;
+ struct scic_sds_remote_device *sci_device;
+ enum sci_status status = SCI_FAILURE_UNSUPPORTED_PROTOCOL;
+ struct isci_remote_device *isci_device;
+ struct isci_request *request;
+ unsigned long flags;
+
+ isci_device = task->dev->lldd_dev;
+ sci_device = &isci_device->sci;
+
+ /* do common allocation and init of request object. */
+ ret = isci_request_alloc_io(
+ isci_host,
+ task,
+ &request,
+ isci_device,
+ gfp_flags
+ );
+
+ if (ret)
+ goto out;
+
+ status = isci_io_request_build(isci_host, request, isci_device);
+ if (status != SCI_SUCCESS) {
+ dev_warn(&isci_host->pdev->dev,
+ "%s: request_construct failed - status = 0x%x\n",
+ __func__,
+ status);
+ goto out;
+ }
+
+ spin_lock_irqsave(&isci_host->scic_lock, flags);
+
+ /* send the request, let the core assign the IO TAG. */
+ status = scic_controller_start_io(&isci_host->sci, sci_device,
+ &request->sci,
+ SCI_CONTROLLER_INVALID_IO_TAG);
+ if (status != SCI_SUCCESS &&
+ status != SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED) {
+ dev_warn(&isci_host->pdev->dev,
+ "%s: failed request start (0x%x)\n",
+ __func__, status);
+ spin_unlock_irqrestore(&isci_host->scic_lock, flags);
+ goto out;
+ }
+
+ /* Either I/O started OK, or the core has signaled that
+ * the device needs a target reset.
+ *
+ * In either case, hold onto the I/O for later.
+ *
+ * Update it's status and add it to the list in the
+ * remote device object.
+ */
+ isci_request_change_state(request, started);
+ list_add(&request->dev_node, &isci_device->reqs_in_process);
+
+ if (status == SCI_SUCCESS) {
+ /* Save the tag for possible task mgmt later. */
+ request->io_tag = request->sci.io_tag;
+ } else {
+ /* The request did not really start in the
+ * hardware, so clear the request handle
+ * here so no terminations will be done.
+ */
+ request->terminated = true;
+ }
+ spin_unlock_irqrestore(&isci_host->scic_lock, flags);
+
+ if (status ==
+ SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED) {
+ /* Signal libsas that we need the SCSI error
+ * handler thread to work on this I/O and that
+ * we want a device reset.
+ */
+ spin_lock_irqsave(&task->task_state_lock, flags);
+ task->task_state_flags |= SAS_TASK_NEED_DEV_RESET;
+ spin_unlock_irqrestore(&task->task_state_lock, flags);
+
+ /* Cause this task to be scheduled in the SCSI error
+ * handler thread.
+ */
+ isci_execpath_callback(isci_host, task,
+ sas_task_abort);
+
+ /* Change the status, since we are holding
+ * the I/O until it is managed by the SCSI
+ * error handler.
+ */
+ status = SCI_SUCCESS;
+ }
+
+ out:
+ if (status != SCI_SUCCESS) {
+ /* release dma memory on failure. */
+ isci_request_free(isci_host, request);
+ request = NULL;
+ ret = SCI_FAILURE;
+ }
- return task->data_dir;
+ *isci_request = request;
+ return ret;
}
+
+
+
git.openpandora.org / pandora-kernel.git / blobdiff