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-rw-r--r--drivers/scsi/isci/task.h132
1 files changed, 1 insertions, 131 deletions
diff --git a/drivers/scsi/isci/task.h b/drivers/scsi/isci/task.h
index 7b6d0e32fd9b..9c06cbad1d26 100644
--- a/drivers/scsi/isci/task.h
+++ b/drivers/scsi/isci/task.h
@@ -63,19 +63,6 @@
63struct isci_request; 63struct isci_request;
64 64
65/** 65/**
66 * enum isci_tmf_cb_state - This enum defines the possible states in which the
67 * TMF callback function is invoked during the TMF execution process.
68 *
69 *
70 */
71enum isci_tmf_cb_state {
72
73 isci_tmf_init_state = 0,
74 isci_tmf_started,
75 isci_tmf_timed_out
76};
77
78/**
79 * enum isci_tmf_function_codes - This enum defines the possible preparations 66 * enum isci_tmf_function_codes - This enum defines the possible preparations
80 * of task management requests. 67 * of task management requests.
81 * 68 *
@@ -87,6 +74,7 @@ enum isci_tmf_function_codes {
87 isci_tmf_ssp_task_abort = TMF_ABORT_TASK, 74 isci_tmf_ssp_task_abort = TMF_ABORT_TASK,
88 isci_tmf_ssp_lun_reset = TMF_LU_RESET, 75 isci_tmf_ssp_lun_reset = TMF_LU_RESET,
89}; 76};
77
90/** 78/**
91 * struct isci_tmf - This class represents the task management object which 79 * struct isci_tmf - This class represents the task management object which
92 * acts as an interface to libsas for processing task management requests 80 * acts as an interface to libsas for processing task management requests
@@ -106,15 +94,6 @@ struct isci_tmf {
106 u16 io_tag; 94 u16 io_tag;
107 enum isci_tmf_function_codes tmf_code; 95 enum isci_tmf_function_codes tmf_code;
108 int status; 96 int status;
109
110 /* The optional callback function allows the user process to
111 * track the TMF transmit / timeout conditions.
112 */
113 void (*cb_state_func)(
114 enum isci_tmf_cb_state,
115 struct isci_tmf *, void *);
116 void *cb_data;
117
118}; 97};
119 98
120static inline void isci_print_tmf(struct isci_host *ihost, struct isci_tmf *tmf) 99static inline void isci_print_tmf(struct isci_host *ihost, struct isci_tmf *tmf)
@@ -208,113 +187,4 @@ int isci_queuecommand(
208 struct scsi_cmnd *scsi_cmd, 187 struct scsi_cmnd *scsi_cmd,
209 void (*donefunc)(struct scsi_cmnd *)); 188 void (*donefunc)(struct scsi_cmnd *));
210 189
211/**
212 * enum isci_completion_selection - This enum defines the possible actions to
213 * take with respect to a given request's notification back to libsas.
214 *
215 *
216 */
217enum isci_completion_selection {
218
219 isci_perform_normal_io_completion, /* Normal notify (task_done) */
220 isci_perform_aborted_io_completion, /* No notification. */
221 isci_perform_error_io_completion /* Use sas_task_abort */
222};
223
224/**
225 * isci_task_set_completion_status() - This function sets the completion status
226 * for the request.
227 * @task: This parameter is the completed request.
228 * @response: This parameter is the response code for the completed task.
229 * @status: This parameter is the status code for the completed task.
230 *
231* @return The new notification mode for the request.
232*/
233static inline enum isci_completion_selection
234isci_task_set_completion_status(
235 struct sas_task *task,
236 enum service_response response,
237 enum exec_status status,
238 enum isci_completion_selection task_notification_selection)
239{
240 unsigned long flags;
241
242 spin_lock_irqsave(&task->task_state_lock, flags);
243
244 /* If a device reset is being indicated, make sure the I/O
245 * is in the error path.
246 */
247 if (task->task_state_flags & SAS_TASK_NEED_DEV_RESET) {
248 /* Fail the I/O to make sure it goes into the error path. */
249 response = SAS_TASK_UNDELIVERED;
250 status = SAM_STAT_TASK_ABORTED;
251
252 task_notification_selection = isci_perform_error_io_completion;
253 }
254 task->task_status.resp = response;
255 task->task_status.stat = status;
256
257 switch (task->task_proto) {
258
259 case SAS_PROTOCOL_SATA:
260 case SAS_PROTOCOL_STP:
261 case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
262
263 if (task_notification_selection
264 == isci_perform_error_io_completion) {
265 /* SATA/STP I/O has it's own means of scheduling device
266 * error handling on the normal path.
267 */
268 task_notification_selection
269 = isci_perform_normal_io_completion;
270 }
271 break;
272 default:
273 break;
274 }
275
276 switch (task_notification_selection) {
277
278 case isci_perform_error_io_completion:
279
280 if (task->task_proto == SAS_PROTOCOL_SMP) {
281 /* There is no error escalation in the SMP case.
282 * Convert to a normal completion to avoid the
283 * timeout in the discovery path and to let the
284 * next action take place quickly.
285 */
286 task_notification_selection
287 = isci_perform_normal_io_completion;
288
289 /* Fall through to the normal case... */
290 } else {
291 /* Use sas_task_abort */
292 /* Leave SAS_TASK_STATE_DONE clear
293 * Leave SAS_TASK_AT_INITIATOR set.
294 */
295 break;
296 }
297
298 case isci_perform_aborted_io_completion:
299 /* This path can occur with task-managed requests as well as
300 * requests terminated because of LUN or device resets.
301 */
302 /* Fall through to the normal case... */
303 case isci_perform_normal_io_completion:
304 /* Normal notification (task_done) */
305 task->task_state_flags |= SAS_TASK_STATE_DONE;
306 task->task_state_flags &= ~(SAS_TASK_AT_INITIATOR |
307 SAS_TASK_STATE_PENDING);
308 break;
309 default:
310 WARN_ONCE(1, "unknown task_notification_selection: %d\n",
311 task_notification_selection);
312 break;
313 }
314
315 spin_unlock_irqrestore(&task->task_state_lock, flags);
316
317 return task_notification_selection;
318
319}
320#endif /* !defined(_SCI_TASK_H_) */ 190#endif /* !defined(_SCI_TASK_H_) */