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56 #ifndef _ISCI_REQUEST_H_
57 #define _ISCI_REQUEST_H_
61 #include "scu_task_context.h"
64 * isci_stp_request - extra request infrastructure to handle pio/atapi protocol
65 * @pio_len - number of bytes requested at PIO setup
66 * @status - pio setup ending status value to tell us if we need
67 * to wait for another fis or if the transfer is complete. Upon
68 * receipt of a d2h fis this will be the status field of that fis.
69 * @sgl - track pio transfer progress as we iterate through the sgl
71 struct isci_stp_request {
75 struct isci_stp_pio_sgl {
83 #define IREQ_COMPLETE_IN_TARGET 0
84 #define IREQ_TERMINATED 1
87 #define IREQ_PENDING_ABORT 4 /* Set == device was not suspended yet */
88 #define IREQ_TC_ABORT_POSTED 5
89 #define IREQ_ABORT_PATH_ACTIVE 6
90 #define IREQ_NO_AUTO_FREE_TAG 7 /* Set when being explicitly managed */
92 /* XXX kill ttype and ttype_ptr, allocate full sas_task */
93 union ttype_ptr_union {
94 struct sas_task *io_task_ptr; /* When ttype==io_task */
95 struct isci_tmf *tmf_task_ptr; /* When ttype==tmf_task */
97 struct isci_host *isci_host;
98 dma_addr_t request_daddr;
99 dma_addr_t zero_scatter_daddr;
100 unsigned int num_sg_entries;
101 /* Note: "io_request_completion" is completed in two different ways
102 * depending on whether this is a TMF or regular request.
103 * - TMF requests are completed in the thread that started them;
104 * - regular requests are completed in the request completion callback
106 * This difference in operation allows the aborter of a TMF request
107 * to be sure that once the TMF request completes, the I/O that the
108 * TMF was aborting is guaranteed to have completed.
110 * XXX kill io_request_completion
112 struct completion *io_request_completion;
113 struct sci_base_state_machine sm;
114 struct isci_host *owning_controller;
115 struct isci_remote_device *target_device;
117 enum sas_protocol protocol;
118 u32 scu_status; /* hardware result */
119 u32 sci_status; /* upper layer disposition */
121 struct scu_task_context *tc;
122 /* could be larger with sg chaining */
123 #define SCU_SGL_SIZE ((SCI_MAX_SCATTER_GATHER_ELEMENTS + 1) / 2)
124 struct scu_sgl_element_pair sg_table[SCU_SGL_SIZE] __attribute__ ((aligned(32)));
125 /* This field is a pointer to the stored rx frame data. It is used in
126 * STP internal requests and SMP response frames. If this field is
127 * non-NULL the saved frame must be released on IO request completion.
129 u32 saved_rx_frame_index;
134 struct ssp_cmd_iu cmd;
135 struct ssp_task_iu tmf;
138 struct ssp_response_iu rsp;
139 u8 rsp_buf[SSP_RESP_IU_MAX_SIZE];
143 struct isci_stp_request req;
144 struct host_to_dev_fis cmd;
145 struct dev_to_host_fis rsp;
150 static inline struct isci_request *to_ireq(struct isci_stp_request *stp_req)
152 struct isci_request *ireq;
154 ireq = container_of(stp_req, typeof(*ireq), stp.req);
159 * enum sci_base_request_states - request state machine states
161 * @SCI_REQ_INIT: Simply the initial state for the base request state machine.
163 * @SCI_REQ_CONSTRUCTED: This state indicates that the request has been
164 * constructed. This state is entered from the INITIAL state.
166 * @SCI_REQ_STARTED: This state indicates that the request has been started.
167 * This state is entered from the CONSTRUCTED state.
169 * @SCI_REQ_STP_UDMA_WAIT_TC_COMP:
170 * @SCI_REQ_STP_UDMA_WAIT_D2H:
171 * @SCI_REQ_STP_NON_DATA_WAIT_H2D:
172 * @SCI_REQ_STP_NON_DATA_WAIT_D2H:
174 * @SCI_REQ_STP_PIO_WAIT_H2D: While in this state the IO request object is
175 * waiting for the TC completion notification for the H2D Register FIS
177 * @SCI_REQ_STP_PIO_WAIT_FRAME: While in this state the IO request object is
178 * waiting for either a PIO Setup FIS or a D2H register FIS. The type of frame
179 * received is based on the result of the prior frame and line conditions.
181 * @SCI_REQ_STP_PIO_DATA_IN: While in this state the IO request object is
182 * waiting for a DATA frame from the device.
184 * @SCI_REQ_STP_PIO_DATA_OUT: While in this state the IO request object is
185 * waiting to transmit the next data frame to the device.
187 * @SCI_REQ_ATAPI_WAIT_H2D: While in this state the IO request object is
188 * waiting for the TC completion notification for the H2D Register FIS
190 * @SCI_REQ_ATAPI_WAIT_PIO_SETUP: While in this state the IO request object is
191 * waiting for either a PIO Setup.
193 * @SCI_REQ_ATAPI_WAIT_D2H: The non-data IO transit to this state in this state
194 * after receiving TC completion. While in this state IO request object is
195 * waiting for D2H status frame as UF.
197 * @SCI_REQ_ATAPI_WAIT_TC_COMP: When transmitting raw frames hardware reports
198 * task context completion after every frame submission, so in the
199 * non-accelerated case we need to expect the completion for the "cdb" frame.
201 * @SCI_REQ_TASK_WAIT_TC_COMP: The AWAIT_TC_COMPLETION sub-state indicates that
202 * the started raw task management request is waiting for the transmission of
203 * the initial frame (i.e. command, task, etc.).
205 * @SCI_REQ_TASK_WAIT_TC_RESP: This sub-state indicates that the started task
206 * management request is waiting for the reception of an unsolicited frame
207 * (i.e. response IU).
209 * @SCI_REQ_SMP_WAIT_RESP: This sub-state indicates that the started task
210 * management request is waiting for the reception of an unsolicited frame
211 * (i.e. response IU).
213 * @SCI_REQ_SMP_WAIT_TC_COMP: The AWAIT_TC_COMPLETION sub-state indicates that
214 * the started SMP request is waiting for the transmission of the initial frame
215 * (i.e. command, task, etc.).
217 * @SCI_REQ_COMPLETED: This state indicates that the request has completed.
218 * This state is entered from the STARTED state. This state is entered from the
221 * @SCI_REQ_ABORTING: This state indicates that the request is in the process
222 * of being terminated/aborted. This state is entered from the CONSTRUCTED
223 * state. This state is entered from the STARTED state.
225 * @SCI_REQ_FINAL: Simply the final state for the base request state machine.
227 #define REQUEST_STATES {\
231 C(REQ_STP_UDMA_WAIT_TC_COMP),\
232 C(REQ_STP_UDMA_WAIT_D2H),\
233 C(REQ_STP_NON_DATA_WAIT_H2D),\
234 C(REQ_STP_NON_DATA_WAIT_D2H),\
235 C(REQ_STP_PIO_WAIT_H2D),\
236 C(REQ_STP_PIO_WAIT_FRAME),\
237 C(REQ_STP_PIO_DATA_IN),\
238 C(REQ_STP_PIO_DATA_OUT),\
239 C(REQ_ATAPI_WAIT_H2D),\
240 C(REQ_ATAPI_WAIT_PIO_SETUP),\
241 C(REQ_ATAPI_WAIT_D2H),\
242 C(REQ_ATAPI_WAIT_TC_COMP),\
243 C(REQ_TASK_WAIT_TC_COMP),\
244 C(REQ_TASK_WAIT_TC_RESP),\
245 C(REQ_SMP_WAIT_RESP),\
246 C(REQ_SMP_WAIT_TC_COMP),\
253 enum sci_base_request_states REQUEST_STATES;
255 const char *req_state_name(enum sci_base_request_states state);
257 enum sci_status sci_request_start(struct isci_request *ireq);
258 enum sci_status sci_io_request_terminate(struct isci_request *ireq);
260 sci_io_request_event_handler(struct isci_request *ireq,
263 sci_io_request_frame_handler(struct isci_request *ireq,
266 sci_task_request_terminate(struct isci_request *ireq);
267 extern enum sci_status
268 sci_request_complete(struct isci_request *ireq);
269 extern enum sci_status
270 sci_io_request_tc_completion(struct isci_request *ireq, u32 code);
272 /* XXX open code in caller */
273 static inline dma_addr_t
274 sci_io_request_get_dma_addr(struct isci_request *ireq, void *virt_addr)
277 char *requested_addr = (char *)virt_addr;
278 char *base_addr = (char *)ireq;
280 BUG_ON(requested_addr < base_addr);
281 BUG_ON((requested_addr - base_addr) >= sizeof(*ireq));
283 return ireq->request_daddr + (requested_addr - base_addr);
286 #define isci_request_access_task(req) ((req)->ttype_ptr.io_task_ptr)
288 #define isci_request_access_tmf(req) ((req)->ttype_ptr.tmf_task_ptr)
290 struct isci_request *isci_tmf_request_from_tag(struct isci_host *ihost,
291 struct isci_tmf *isci_tmf,
293 int isci_request_execute(struct isci_host *ihost, struct isci_remote_device *idev,
294 struct sas_task *task, u16 tag);
296 sci_task_request_construct(struct isci_host *ihost,
297 struct isci_remote_device *idev,
299 struct isci_request *ireq);
300 enum sci_status sci_task_request_construct_ssp(struct isci_request *ireq);
301 void sci_smp_request_copy_response(struct isci_request *ireq);
303 static inline int isci_task_is_ncq_recovery(struct sas_task *task)
305 return (sas_protocol_ata(task->task_proto) &&
306 task->ata_task.fis.command == ATA_CMD_READ_LOG_EXT &&
307 task->ata_task.fis.lbal == ATA_LOG_SATA_NCQ);
310 #endif /* !defined(_ISCI_REQUEST_H_) */