diff options
Diffstat (limited to 'drivers/scsi/isci/request.h')
| -rw-r--r-- | drivers/scsi/isci/request.h | 357 |
1 files changed, 173 insertions, 184 deletions
diff --git a/drivers/scsi/isci/request.h b/drivers/scsi/isci/request.h index 31d6d571747..757cd99ae2e 100644 --- a/drivers/scsi/isci/request.h +++ b/drivers/scsi/isci/request.h @@ -96,37 +96,42 @@ struct scic_sds_stp_request { u32 udma; struct scic_sds_stp_pio_request { - /** - * Total transfer for the entire PIO request recorded at request constuction - * time. + /* + * Total transfer for the entire PIO request recorded + * at request constuction time. * - * @todo Should we just decrement this value for each byte of data transitted - * or received to elemenate the current_transfer_bytes field? + * @todo Should we just decrement this value for each + * byte of data transitted or received to elemenate + * the current_transfer_bytes field? */ u32 total_transfer_bytes; - /** - * Total number of bytes received/transmitted in data frames since the start - * of the IO request. At the end of the IO request this should equal the + /* + * Total number of bytes received/transmitted in data + * frames since the start of the IO request. At the + * end of the IO request this should equal the * total_transfer_bytes. */ u32 current_transfer_bytes; - /** - * The number of bytes requested in the in the PIO setup. + /* + * The number of bytes requested in the in the PIO + * setup. */ u32 pio_transfer_bytes; - /** - * PIO Setup ending status value to tell us if we need to wait for another FIS - * or if the transfer is complete. On the receipt of a D2H FIS this will be + /* + * PIO Setup ending status value to tell us if we need + * to wait for another FIS or if the transfer is + * complete. On the receipt of a D2H FIS this will be * the status field of that FIS. */ u8 ending_status; - /** - * On receipt of a D2H FIS this will be the ending error field if the - * ending_status has the SATA_STATUS_ERR bit set. + /* + * On receipt of a D2H FIS this will be the ending + * error field if the ending_status has the + * SATA_STATUS_ERR bit set. */ u8 ending_error; @@ -138,8 +143,9 @@ struct scic_sds_stp_request { } pio; struct { - /** - * The number of bytes requested in the PIO setup before CDB data frame. + /* + * The number of bytes requested in the PIO setup + * before CDB data frame. */ u32 device_preferred_cdb_length; } packet; @@ -147,57 +153,59 @@ struct scic_sds_stp_request { }; struct scic_sds_request { - /** - * This field contains the information for the base request state machine. + /* + * This field contains the information for the base request state + * machine. */ - struct sci_base_state_machine state_machine; + struct sci_base_state_machine sm; - /** + /* * This field simply points to the controller to which this IO request * is associated. */ struct scic_sds_controller *owning_controller; - /** - * This field simply points to the remote device to which this IO request - * is associated. + /* + * This field simply points to the remote device to which this IO + * request is associated. */ struct scic_sds_remote_device *target_device; - /** + /* * This field is utilized to determine if the SCI user is managing * the IO tag for this request or if the core is managing it. */ bool was_tag_assigned_by_user; - /** + /* * This field indicates the IO tag for this request. The IO tag is * comprised of the task_index and a sequence count. The sequence count * is utilized to help identify tasks from one life to another. */ u16 io_tag; - /** + /* * This field specifies the protocol being utilized for this * IO request. */ enum sci_request_protocol protocol; - /** + /* * This field indicates the completion status taken from the SCUs - * completion code. It indicates the completion result for the SCU hardware. + * completion code. It indicates the completion result for the SCU + * hardware. */ u32 scu_status; - /** - * This field indicates the completion status returned to the SCI user. It - * indicates the users view of the io request completion. + /* + * This field indicates the completion status returned to the SCI user. + * It indicates the users view of the io request completion. */ u32 sci_status; - /** - * This field contains the value to be utilized when posting (e.g. Post_TC, - * Post_TC_Abort) this request to the silicon. + /* + * This field contains the value to be utilized when posting + * (e.g. Post_TC, * Post_TC_Abort) this request to the silicon. */ u32 post_context; @@ -208,26 +216,26 @@ struct scic_sds_request { #define SCU_SGL_SIZE ((SCU_IO_REQUEST_SGE_COUNT + 1) / 2) struct scu_sgl_element_pair sg_table[SCU_SGL_SIZE] __attribute__ ((aligned(32))); - /** + /* * This field indicates if this request is a task management request or * normal IO request. */ bool is_task_management_request; - /** - * This field is a pointer to the stored rx frame data. It is used in STP - * internal requests and SMP response frames. If this field is non-NULL the - * saved frame must be released on IO request completion. + /* + * This field is a pointer to the stored rx frame data. It is used in + * STP internal requests and SMP response frames. If this field is + * non-NULL the saved frame must be released on IO request completion. * * @todo In the future do we want to keep a list of RX frame buffers? */ u32 saved_rx_frame_index; - /** - * This field in the recorded device sequence for the io request. This is - * recorded during the build operation and is compared in the start - * operation. If the sequence is different then there was a change of - * devices from the build to start operations. + /* + * This field in the recorded device sequence for the io request. + * This is recorded during the build operation and is compared in the + * start operation. If the sequence is different then there was a + * change of devices from the build to start operations. */ u8 device_sequence; @@ -286,7 +294,7 @@ struct isci_request { dma_addr_t request_daddr; dma_addr_t zero_scatter_daddr; - unsigned int num_sg_entries; /* returned by pci_alloc_sg */ + unsigned int num_sg_entries; /* returned by pci_alloc_sg */ /** Note: "io_request_completion" is completed in two different ways * depending on whether this is a TMF or regular request. @@ -315,104 +323,105 @@ static inline struct isci_request *sci_req_to_ireq(struct scic_sds_request *sci_ * */ enum sci_base_request_states { - /** + /* * Simply the initial state for the base request state machine. */ - SCI_BASE_REQUEST_STATE_INITIAL, + SCI_REQ_INIT, - /** - * This state indicates that the request has been constructed. This state - * is entered from the INITIAL state. + /* + * This state indicates that the request has been constructed. + * This state is entered from the INITIAL state. */ - SCI_BASE_REQUEST_STATE_CONSTRUCTED, + SCI_REQ_CONSTRUCTED, - /** - * This state indicates that the request has been started. This state is - * entered from the CONSTRUCTED state. + /* + * This state indicates that the request has been started. This state + * is entered from the CONSTRUCTED state. */ - SCI_BASE_REQUEST_STATE_STARTED, + SCI_REQ_STARTED, - SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_TC_COMPLETION_SUBSTATE, - SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_D2H_REG_FIS_SUBSTATE, + SCI_REQ_STP_UDMA_WAIT_TC_COMP, + SCI_REQ_STP_UDMA_WAIT_D2H, - SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_H2D_COMPLETION_SUBSTATE, - SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_D2H_SUBSTATE, + SCI_REQ_STP_NON_DATA_WAIT_H2D, + SCI_REQ_STP_NON_DATA_WAIT_D2H, - SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_ASSERTED_COMPLETION_SUBSTATE, - SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_DIAGNOSTIC_COMPLETION_SUBSTATE, - SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_D2H_RESPONSE_FRAME_SUBSTATE, + SCI_REQ_STP_SOFT_RESET_WAIT_H2D_ASSERTED, + SCI_REQ_STP_SOFT_RESET_WAIT_H2D_DIAG, + SCI_REQ_STP_SOFT_RESET_WAIT_D2H, - /** - * While in this state the IO request object is waiting for the TC completion - * notification for the H2D Register FIS + /* + * While in this state the IO request object is waiting for the TC + * completion notification for the H2D Register FIS */ - SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_H2D_COMPLETION_SUBSTATE, + SCI_REQ_STP_PIO_WAIT_H2D, - /** - * While in this state the IO request object is waiting for either a PIO Setup - * FIS or a D2H register FIS. The type of frame received is based on the - * result of the prior frame and line conditions. + /* + * While in this state the IO request object is waiting for either a + * PIO Setup FIS or a D2H register FIS. The type of frame received is + * based on the result of the prior frame and line conditions. */ - SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE, + SCI_REQ_STP_PIO_WAIT_FRAME, - /** - * While in this state the IO request object is waiting for a DATA frame from - * the device. + /* + * While in this state the IO request object is waiting for a DATA + * frame from the device. */ - SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_IN_AWAIT_DATA_SUBSTATE, + SCI_REQ_STP_PIO_DATA_IN, - /** - * While in this state the IO request object is waiting to transmit the next data - * frame to the device. + /* + * While in this state the IO request object is waiting to transmit + * the next data frame to the device. */ - SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_OUT_TRANSMIT_DATA_SUBSTATE, + SCI_REQ_STP_PIO_DATA_OUT, - /** + /* * The AWAIT_TC_COMPLETION sub-state indicates that the started raw * task management request is waiting for the transmission of the * initial frame (i.e. command, task, etc.). */ - SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_COMPLETION, + SCI_REQ_TASK_WAIT_TC_COMP, - /** + /* * This sub-state indicates that the started task management request * is waiting for the reception of an unsolicited frame * (i.e. response IU). */ - SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE, + SCI_REQ_TASK_WAIT_TC_RESP, - /** + /* * This sub-state indicates that the started task management request * is waiting for the reception of an unsolicited frame * (i.e. response IU). */ - SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_RESPONSE, + SCI_REQ_SMP_WAIT_RESP, - /** - * The AWAIT_TC_COMPLETION sub-state indicates that the started SMP request is - * waiting for the transmission of the initial frame (i.e. command, task, etc.). + /* + * The AWAIT_TC_COMPLETION sub-state indicates that the started SMP + * request is waiting for the transmission of the initial frame + * (i.e. command, task, etc.). */ - SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_TC_COMPLETION, + SCI_REQ_SMP_WAIT_TC_COMP, - /** + /* * This state indicates that the request has completed. - * This state is entered from the STARTED state. This state is entered from - * the ABORTING state. + * This state is entered from the STARTED state. This state is entered + * from the ABORTING state. */ - SCI_BASE_REQUEST_STATE_COMPLETED, + SCI_REQ_COMPLETED, - /** + /* * This state indicates that the request is in the process of being * terminated/aborted. * This state is entered from the CONSTRUCTED state. * This state is entered from the STARTED state. */ - SCI_BASE_REQUEST_STATE_ABORTING, + SCI_REQ_ABORTING, - /** + /* * Simply the final state for the base request state machine. */ - SCI_BASE_REQUEST_STATE_FINAL, + SCI_REQ_FINAL, }; /** @@ -498,13 +507,18 @@ enum sci_base_request_states { enum sci_status scic_sds_request_start(struct scic_sds_request *sci_req); enum sci_status scic_sds_io_request_terminate(struct scic_sds_request *sci_req); -enum sci_status scic_sds_io_request_event_handler(struct scic_sds_request *sci_req, - u32 event_code); -enum sci_status scic_sds_io_request_frame_handler(struct scic_sds_request *sci_req, - u32 frame_index); -enum sci_status scic_sds_task_request_terminate(struct scic_sds_request *sci_req); -extern enum sci_status scic_sds_request_complete(struct scic_sds_request *sci_req); -extern enum sci_status scic_sds_io_request_tc_completion(struct scic_sds_request *sci_req, u32 code); +enum sci_status +scic_sds_io_request_event_handler(struct scic_sds_request *sci_req, + u32 event_code); +enum sci_status +scic_sds_io_request_frame_handler(struct scic_sds_request *sci_req, + u32 frame_index); +enum sci_status +scic_sds_task_request_terminate(struct scic_sds_request *sci_req); +extern enum sci_status +scic_sds_request_complete(struct scic_sds_request *sci_req); +extern enum sci_status +scic_sds_io_request_tc_completion(struct scic_sds_request *sci_req, u32 code); /* XXX open code in caller */ static inline void *scic_request_get_virt_addr(struct scic_sds_request *sci_req, @@ -523,8 +537,8 @@ static inline void *scic_request_get_virt_addr(struct scic_sds_request *sci_req, } /* XXX open code in caller */ -static inline dma_addr_t scic_io_request_get_dma_addr(struct scic_sds_request *sci_req, - void *virt_addr) +static inline dma_addr_t +scic_io_request_get_dma_addr(struct scic_sds_request *sci_req, void *virt_addr) { struct isci_request *ireq = sci_req_to_ireq(sci_req); @@ -543,9 +557,8 @@ static inline dma_addr_t scic_io_request_get_dma_addr(struct scic_sds_request *s * * status of the object as a isci_request_status enum. */ -static inline -enum isci_request_status isci_request_get_state( - struct isci_request *isci_request) +static inline enum isci_request_status +isci_request_get_state(struct isci_request *isci_request) { BUG_ON(isci_request == NULL); @@ -566,9 +579,9 @@ enum isci_request_status isci_request_get_state( * @status: This Parameter is the new status of the object * */ -static inline enum isci_request_status isci_request_change_state( - struct isci_request *isci_request, - enum isci_request_status status) +static inline enum isci_request_status +isci_request_change_state(struct isci_request *isci_request, + enum isci_request_status status) { enum isci_request_status old_state; unsigned long flags; @@ -597,10 +610,10 @@ static inline enum isci_request_status isci_request_change_state( * * state previous to any change. */ -static inline enum isci_request_status isci_request_change_started_to_newstate( - struct isci_request *isci_request, - struct completion *completion_ptr, - enum isci_request_status newstate) +static inline enum isci_request_status +isci_request_change_started_to_newstate(struct isci_request *isci_request, + struct completion *completion_ptr, + enum isci_request_status newstate) { enum isci_request_status old_state; unsigned long flags; @@ -615,6 +628,7 @@ static inline enum isci_request_status isci_request_change_started_to_newstate( isci_request->io_request_completion = completion_ptr; isci_request->status = newstate; } + spin_unlock_irqrestore(&isci_request->state_lock, flags); dev_dbg(&isci_request->isci_host->pdev->dev, @@ -635,13 +649,13 @@ static inline enum isci_request_status isci_request_change_started_to_newstate( * * state previous to any change. */ -static inline enum isci_request_status isci_request_change_started_to_aborted( - struct isci_request *isci_request, - struct completion *completion_ptr) +static inline enum isci_request_status +isci_request_change_started_to_aborted(struct isci_request *isci_request, + struct completion *completion_ptr) { - return isci_request_change_started_to_newstate( - isci_request, completion_ptr, aborted - ); + return isci_request_change_started_to_newstate(isci_request, + completion_ptr, + aborted); } /** * isci_request_free() - This function frees the request object. @@ -649,62 +663,33 @@ static inline enum isci_request_status isci_request_change_started_to_aborted( * @isci_request: This parameter points to the isci_request object * */ -static inline void isci_request_free( - struct isci_host *isci_host, - struct isci_request *isci_request) +static inline void isci_request_free(struct isci_host *isci_host, + struct isci_request *isci_request) { if (!isci_request) return; /* release the dma memory if we fail. */ - dma_pool_free(isci_host->dma_pool, isci_request, + dma_pool_free(isci_host->dma_pool, + isci_request, isci_request->request_daddr); } +#define isci_request_access_task(req) ((req)->ttype_ptr.io_task_ptr) -/* #define ISCI_REQUEST_VALIDATE_ACCESS - */ - -#ifdef ISCI_REQUEST_VALIDATE_ACCESS - -static inline -struct sas_task *isci_request_access_task(struct isci_request *isci_request) -{ - BUG_ON(isci_request->ttype != io_task); - return isci_request->ttype_ptr.io_task_ptr; -} - -static inline -struct isci_tmf *isci_request_access_tmf(struct isci_request *isci_request) -{ - BUG_ON(isci_request->ttype != tmf_task); - return isci_request->ttype_ptr.tmf_task_ptr; -} - -#else /* not ISCI_REQUEST_VALIDATE_ACCESS */ - -#define isci_request_access_task(RequestPtr) \ - ((RequestPtr)->ttype_ptr.io_task_ptr) - -#define isci_request_access_tmf(RequestPtr) \ - ((RequestPtr)->ttype_ptr.tmf_task_ptr) - -#endif /* not ISCI_REQUEST_VALIDATE_ACCESS */ - +#define isci_request_access_tmf(req) ((req)->ttype_ptr.tmf_task_ptr) -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); +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); -int isci_request_execute( - struct isci_host *isci_host, - struct sas_task *task, - struct isci_request **request, - gfp_t gfp_flags); +int isci_request_execute(struct isci_host *isci_host, + struct sas_task *task, + struct isci_request **request, + gfp_t gfp_flags); /** * isci_request_unmap_sgl() - This function unmaps the DMA address of a given @@ -713,9 +698,8 @@ int isci_request_execute( * @*pdev: This Parameter is the pci_device struct for the controller * */ -static inline void isci_request_unmap_sgl( - struct isci_request *request, - struct pci_dev *pdev) +static inline void +isci_request_unmap_sgl(struct isci_request *request, struct pci_dev *pdev) { struct sas_task *task = isci_request_access_task(request); @@ -758,9 +742,9 @@ static inline void isci_request_unmap_sgl( * * pointer to the next sge for specified request. */ -static inline void *isci_request_io_request_get_next_sge( - struct isci_request *request, - void *current_sge_address) +static inline void * +isci_request_io_request_get_next_sge(struct isci_request *request, + void *current_sge_address) { struct sas_task *task = isci_request_access_task(request); void *ret = NULL; @@ -791,15 +775,20 @@ static inline void *isci_request_io_request_get_next_sge( return ret; } -void isci_terminate_pending_requests(struct isci_host *isci_host, - struct isci_remote_device *isci_device, - enum isci_request_status new_request_state); -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); -enum sci_status scic_task_request_construct_ssp(struct scic_sds_request *sci_req); -enum sci_status scic_task_request_construct_sata(struct scic_sds_request *sci_req); -void scic_stp_io_request_set_ncq_tag(struct scic_sds_request *sci_req, u16 ncq_tag); +void +isci_terminate_pending_requests(struct isci_host *isci_host, + struct isci_remote_device *isci_device, + enum isci_request_status new_request_state); +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); +enum sci_status +scic_task_request_construct_ssp(struct scic_sds_request *sci_req); +enum sci_status +scic_task_request_construct_sata(struct scic_sds_request *sci_req); +void +scic_stp_io_request_set_ncq_tag(struct scic_sds_request *sci_req, u16 ncq_tag); void scic_sds_smp_request_copy_response(struct scic_sds_request *sci_req); #endif /* !defined(_ISCI_REQUEST_H_) */ |