1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Aic94xx Task Management Functions
4 *
5 * Copyright (C) 2005 Adaptec, Inc. All rights reserved.
6 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
7 */
8
9 #include <linux/spinlock.h>
10 #include <linux/gfp.h>
11 #include "aic94xx.h"
12 #include "aic94xx_sas.h"
13 #include "aic94xx_hwi.h"
14
15 /* ---------- Internal enqueue ---------- */
16
asd_enqueue_internal(struct asd_ascb * ascb,void (* tasklet_complete)(struct asd_ascb *,struct done_list_struct *),void (* timed_out)(struct timer_list * t))17 static int asd_enqueue_internal(struct asd_ascb *ascb,
18 void (*tasklet_complete)(struct asd_ascb *,
19 struct done_list_struct *),
20 void (*timed_out)(struct timer_list *t))
21 {
22 int res;
23
24 ascb->tasklet_complete = tasklet_complete;
25 ascb->uldd_timer = 1;
26
27 ascb->timer.function = timed_out;
28 ascb->timer.expires = jiffies + AIC94XX_SCB_TIMEOUT;
29
30 add_timer(&ascb->timer);
31
32 res = asd_post_ascb_list(ascb->ha, ascb, 1);
33 if (unlikely(res))
34 del_timer(&ascb->timer);
35 return res;
36 }
37
38 /* ---------- CLEAR NEXUS ---------- */
39
40 struct tasklet_completion_status {
41 int dl_opcode;
42 int tmf_state;
43 u8 tag_valid:1;
44 __be16 tag;
45 };
46
47 #define DECLARE_TCS(tcs) \
48 struct tasklet_completion_status tcs = { \
49 .dl_opcode = 0, \
50 .tmf_state = 0, \
51 .tag_valid = 0, \
52 .tag = 0, \
53 }
54
55
asd_clear_nexus_tasklet_complete(struct asd_ascb * ascb,struct done_list_struct * dl)56 static void asd_clear_nexus_tasklet_complete(struct asd_ascb *ascb,
57 struct done_list_struct *dl)
58 {
59 struct tasklet_completion_status *tcs = ascb->uldd_task;
60 ASD_DPRINTK("%s: here\n", __func__);
61 if (!del_timer(&ascb->timer)) {
62 ASD_DPRINTK("%s: couldn't delete timer\n", __func__);
63 return;
64 }
65 ASD_DPRINTK("%s: opcode: 0x%x\n", __func__, dl->opcode);
66 tcs->dl_opcode = dl->opcode;
67 complete(ascb->completion);
68 asd_ascb_free(ascb);
69 }
70
asd_clear_nexus_timedout(struct timer_list * t)71 static void asd_clear_nexus_timedout(struct timer_list *t)
72 {
73 struct asd_ascb *ascb = from_timer(ascb, t, timer);
74 struct tasklet_completion_status *tcs = ascb->uldd_task;
75
76 ASD_DPRINTK("%s: here\n", __func__);
77 tcs->dl_opcode = TMF_RESP_FUNC_FAILED;
78 complete(ascb->completion);
79 }
80
81 #define CLEAR_NEXUS_PRE \
82 struct asd_ascb *ascb; \
83 struct scb *scb; \
84 int res; \
85 DECLARE_COMPLETION_ONSTACK(completion); \
86 DECLARE_TCS(tcs); \
87 \
88 ASD_DPRINTK("%s: PRE\n", __func__); \
89 res = 1; \
90 ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL); \
91 if (!ascb) \
92 return -ENOMEM; \
93 \
94 ascb->completion = &completion; \
95 ascb->uldd_task = &tcs; \
96 scb = ascb->scb; \
97 scb->header.opcode = CLEAR_NEXUS
98
99 #define CLEAR_NEXUS_POST \
100 ASD_DPRINTK("%s: POST\n", __func__); \
101 res = asd_enqueue_internal(ascb, asd_clear_nexus_tasklet_complete, \
102 asd_clear_nexus_timedout); \
103 if (res) \
104 goto out_err; \
105 ASD_DPRINTK("%s: clear nexus posted, waiting...\n", __func__); \
106 wait_for_completion(&completion); \
107 res = tcs.dl_opcode; \
108 if (res == TC_NO_ERROR) \
109 res = TMF_RESP_FUNC_COMPLETE; \
110 return res; \
111 out_err: \
112 asd_ascb_free(ascb); \
113 return res
114
asd_clear_nexus_ha(struct sas_ha_struct * sas_ha)115 int asd_clear_nexus_ha(struct sas_ha_struct *sas_ha)
116 {
117 struct asd_ha_struct *asd_ha = sas_ha->lldd_ha;
118
119 CLEAR_NEXUS_PRE;
120 scb->clear_nexus.nexus = NEXUS_ADAPTER;
121 CLEAR_NEXUS_POST;
122 }
123
asd_clear_nexus_port(struct asd_sas_port * port)124 int asd_clear_nexus_port(struct asd_sas_port *port)
125 {
126 struct asd_ha_struct *asd_ha = port->ha->lldd_ha;
127
128 CLEAR_NEXUS_PRE;
129 scb->clear_nexus.nexus = NEXUS_PORT;
130 scb->clear_nexus.conn_mask = port->phy_mask;
131 CLEAR_NEXUS_POST;
132 }
133
134 enum clear_nexus_phase {
135 NEXUS_PHASE_PRE,
136 NEXUS_PHASE_POST,
137 NEXUS_PHASE_RESUME,
138 };
139
asd_clear_nexus_I_T(struct domain_device * dev,enum clear_nexus_phase phase)140 static int asd_clear_nexus_I_T(struct domain_device *dev,
141 enum clear_nexus_phase phase)
142 {
143 struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
144
145 CLEAR_NEXUS_PRE;
146 scb->clear_nexus.nexus = NEXUS_I_T;
147 switch (phase) {
148 case NEXUS_PHASE_PRE:
149 scb->clear_nexus.flags = EXEC_Q | SUSPEND_TX;
150 break;
151 case NEXUS_PHASE_POST:
152 scb->clear_nexus.flags = SEND_Q | NOTINQ;
153 break;
154 case NEXUS_PHASE_RESUME:
155 scb->clear_nexus.flags = RESUME_TX;
156 }
157 scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long)
158 dev->lldd_dev);
159 CLEAR_NEXUS_POST;
160 }
161
asd_I_T_nexus_reset(struct domain_device * dev)162 int asd_I_T_nexus_reset(struct domain_device *dev)
163 {
164 int res, tmp_res, i;
165 struct sas_phy *phy = sas_get_local_phy(dev);
166 /* Standard mandates link reset for ATA (type 0) and
167 * hard reset for SSP (type 1) */
168 int reset_type = (dev->dev_type == SAS_SATA_DEV ||
169 (dev->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
170
171 asd_clear_nexus_I_T(dev, NEXUS_PHASE_PRE);
172 /* send a hard reset */
173 ASD_DPRINTK("sending %s reset to %s\n",
174 reset_type ? "hard" : "soft", dev_name(&phy->dev));
175 res = sas_phy_reset(phy, reset_type);
176 if (res == TMF_RESP_FUNC_COMPLETE || res == -ENODEV) {
177 /* wait for the maximum settle time */
178 msleep(500);
179 /* clear all outstanding commands (keep nexus suspended) */
180 asd_clear_nexus_I_T(dev, NEXUS_PHASE_POST);
181 }
182 for (i = 0 ; i < 3; i++) {
183 tmp_res = asd_clear_nexus_I_T(dev, NEXUS_PHASE_RESUME);
184 if (tmp_res == TC_RESUME)
185 goto out;
186 msleep(500);
187 }
188
189 /* This is a bit of a problem: the sequencer is still suspended
190 * and is refusing to resume. Hope it will resume on a bigger hammer
191 * or the disk is lost */
192 dev_printk(KERN_ERR, &phy->dev,
193 "Failed to resume nexus after reset 0x%x\n", tmp_res);
194
195 res = TMF_RESP_FUNC_FAILED;
196 out:
197 sas_put_local_phy(phy);
198 return res;
199 }
200
asd_clear_nexus_I_T_L(struct domain_device * dev,u8 * lun)201 static int asd_clear_nexus_I_T_L(struct domain_device *dev, u8 *lun)
202 {
203 struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
204
205 CLEAR_NEXUS_PRE;
206 scb->clear_nexus.nexus = NEXUS_I_T_L;
207 scb->clear_nexus.flags = SEND_Q | EXEC_Q | NOTINQ;
208 memcpy(scb->clear_nexus.ssp_task.lun, lun, 8);
209 scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long)
210 dev->lldd_dev);
211 CLEAR_NEXUS_POST;
212 }
213
asd_clear_nexus_tag(struct sas_task * task)214 static int asd_clear_nexus_tag(struct sas_task *task)
215 {
216 struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha;
217 struct asd_ascb *tascb = task->lldd_task;
218
219 CLEAR_NEXUS_PRE;
220 scb->clear_nexus.nexus = NEXUS_TAG;
221 memcpy(scb->clear_nexus.ssp_task.lun, task->ssp_task.LUN, 8);
222 scb->clear_nexus.ssp_task.tag = tascb->tag;
223 if (task->dev->tproto)
224 scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long)
225 task->dev->lldd_dev);
226 CLEAR_NEXUS_POST;
227 }
228
asd_clear_nexus_index(struct sas_task * task)229 static int asd_clear_nexus_index(struct sas_task *task)
230 {
231 struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha;
232 struct asd_ascb *tascb = task->lldd_task;
233
234 CLEAR_NEXUS_PRE;
235 scb->clear_nexus.nexus = NEXUS_TRANS_CX;
236 if (task->dev->tproto)
237 scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long)
238 task->dev->lldd_dev);
239 scb->clear_nexus.index = cpu_to_le16(tascb->tc_index);
240 CLEAR_NEXUS_POST;
241 }
242
243 /* ---------- TMFs ---------- */
244
asd_tmf_timedout(struct timer_list * t)245 static void asd_tmf_timedout(struct timer_list *t)
246 {
247 struct asd_ascb *ascb = from_timer(ascb, t, timer);
248 struct tasklet_completion_status *tcs = ascb->uldd_task;
249
250 ASD_DPRINTK("tmf timed out\n");
251 tcs->tmf_state = TMF_RESP_FUNC_FAILED;
252 complete(ascb->completion);
253 }
254
asd_get_tmf_resp_tasklet(struct asd_ascb * ascb,struct done_list_struct * dl)255 static int asd_get_tmf_resp_tasklet(struct asd_ascb *ascb,
256 struct done_list_struct *dl)
257 {
258 struct asd_ha_struct *asd_ha = ascb->ha;
259 unsigned long flags;
260 struct tc_resp_sb_struct {
261 __le16 index_escb;
262 u8 len_lsb;
263 u8 flags;
264 } __attribute__ ((packed)) *resp_sb = (void *) dl->status_block;
265
266 int edb_id = ((resp_sb->flags & 0x70) >> 4)-1;
267 struct asd_ascb *escb;
268 struct asd_dma_tok *edb;
269 struct ssp_frame_hdr *fh;
270 struct ssp_response_iu *ru;
271 int res = TMF_RESP_FUNC_FAILED;
272
273 ASD_DPRINTK("tmf resp tasklet\n");
274
275 spin_lock_irqsave(&asd_ha->seq.tc_index_lock, flags);
276 escb = asd_tc_index_find(&asd_ha->seq,
277 (int)le16_to_cpu(resp_sb->index_escb));
278 spin_unlock_irqrestore(&asd_ha->seq.tc_index_lock, flags);
279
280 if (!escb) {
281 ASD_DPRINTK("Uh-oh! No escb for this dl?!\n");
282 return res;
283 }
284
285 edb = asd_ha->seq.edb_arr[edb_id + escb->edb_index];
286 ascb->tag = *(__be16 *)(edb->vaddr+4);
287 fh = edb->vaddr + 16;
288 ru = edb->vaddr + 16 + sizeof(*fh);
289 res = ru->status;
290 if (ru->datapres == SAS_DATAPRES_RESPONSE_DATA)
291 res = ru->resp_data[3];
292 #if 0
293 ascb->tag = fh->tag;
294 #endif
295 ascb->tag_valid = 1;
296
297 asd_invalidate_edb(escb, edb_id);
298 return res;
299 }
300
asd_tmf_tasklet_complete(struct asd_ascb * ascb,struct done_list_struct * dl)301 static void asd_tmf_tasklet_complete(struct asd_ascb *ascb,
302 struct done_list_struct *dl)
303 {
304 struct tasklet_completion_status *tcs;
305
306 if (!del_timer(&ascb->timer))
307 return;
308
309 tcs = ascb->uldd_task;
310 ASD_DPRINTK("tmf tasklet complete\n");
311
312 tcs->dl_opcode = dl->opcode;
313
314 if (dl->opcode == TC_SSP_RESP) {
315 tcs->tmf_state = asd_get_tmf_resp_tasklet(ascb, dl);
316 tcs->tag_valid = ascb->tag_valid;
317 tcs->tag = ascb->tag;
318 }
319
320 complete(ascb->completion);
321 asd_ascb_free(ascb);
322 }
323
asd_clear_nexus(struct sas_task * task)324 static int asd_clear_nexus(struct sas_task *task)
325 {
326 int res = TMF_RESP_FUNC_FAILED;
327 int leftover;
328 struct asd_ascb *tascb = task->lldd_task;
329 DECLARE_COMPLETION_ONSTACK(completion);
330 unsigned long flags;
331
332 tascb->completion = &completion;
333
334 ASD_DPRINTK("task not done, clearing nexus\n");
335 if (tascb->tag_valid)
336 res = asd_clear_nexus_tag(task);
337 else
338 res = asd_clear_nexus_index(task);
339 leftover = wait_for_completion_timeout(&completion,
340 AIC94XX_SCB_TIMEOUT);
341 tascb->completion = NULL;
342 ASD_DPRINTK("came back from clear nexus\n");
343 spin_lock_irqsave(&task->task_state_lock, flags);
344 if (leftover < 1)
345 res = TMF_RESP_FUNC_FAILED;
346 if (task->task_state_flags & SAS_TASK_STATE_DONE)
347 res = TMF_RESP_FUNC_COMPLETE;
348 spin_unlock_irqrestore(&task->task_state_lock, flags);
349
350 return res;
351 }
352
353 /**
354 * asd_abort_task -- ABORT TASK TMF
355 * @task: the task to be aborted
356 *
357 * Before calling ABORT TASK the task state flags should be ORed with
358 * SAS_TASK_STATE_ABORTED (unless SAS_TASK_STATE_DONE is set) under
359 * the task_state_lock IRQ spinlock, then ABORT TASK *must* be called.
360 *
361 * Implements the ABORT TASK TMF, I_T_L_Q nexus.
362 * Returns: SAS TMF responses (see sas_task.h),
363 * -ENOMEM,
364 * -SAS_QUEUE_FULL.
365 *
366 * When ABORT TASK returns, the caller of ABORT TASK checks first the
367 * task->task_state_flags, and then the return value of ABORT TASK.
368 *
369 * If the task has task state bit SAS_TASK_STATE_DONE set, then the
370 * task was completed successfully prior to it being aborted. The
371 * caller of ABORT TASK has responsibility to call task->task_done()
372 * xor free the task, depending on their framework. The return code
373 * is TMF_RESP_FUNC_FAILED in this case.
374 *
375 * Else the SAS_TASK_STATE_DONE bit is not set,
376 * If the return code is TMF_RESP_FUNC_COMPLETE, then
377 * the task was aborted successfully. The caller of
378 * ABORT TASK has responsibility to call task->task_done()
379 * to finish the task, xor free the task depending on their
380 * framework.
381 * else
382 * the ABORT TASK returned some kind of error. The task
383 * was _not_ cancelled. Nothing can be assumed.
384 * The caller of ABORT TASK may wish to retry.
385 */
asd_abort_task(struct sas_task * task)386 int asd_abort_task(struct sas_task *task)
387 {
388 struct asd_ascb *tascb = task->lldd_task;
389 struct asd_ha_struct *asd_ha = tascb->ha;
390 int res = 1;
391 unsigned long flags;
392 struct asd_ascb *ascb = NULL;
393 struct scb *scb;
394 int leftover;
395 DECLARE_TCS(tcs);
396 DECLARE_COMPLETION_ONSTACK(completion);
397 DECLARE_COMPLETION_ONSTACK(tascb_completion);
398
399 tascb->completion = &tascb_completion;
400
401 spin_lock_irqsave(&task->task_state_lock, flags);
402 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
403 spin_unlock_irqrestore(&task->task_state_lock, flags);
404 res = TMF_RESP_FUNC_COMPLETE;
405 ASD_DPRINTK("%s: task 0x%p done\n", __func__, task);
406 goto out_done;
407 }
408 spin_unlock_irqrestore(&task->task_state_lock, flags);
409
410 ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL);
411 if (!ascb)
412 return -ENOMEM;
413
414 ascb->uldd_task = &tcs;
415 ascb->completion = &completion;
416 scb = ascb->scb;
417 scb->header.opcode = SCB_ABORT_TASK;
418
419 switch (task->task_proto) {
420 case SAS_PROTOCOL_SATA:
421 case SAS_PROTOCOL_STP:
422 scb->abort_task.proto_conn_rate = (1 << 5); /* STP */
423 break;
424 case SAS_PROTOCOL_SSP:
425 scb->abort_task.proto_conn_rate = (1 << 4); /* SSP */
426 scb->abort_task.proto_conn_rate |= task->dev->linkrate;
427 break;
428 case SAS_PROTOCOL_SMP:
429 break;
430 default:
431 break;
432 }
433
434 if (task->task_proto == SAS_PROTOCOL_SSP) {
435 scb->abort_task.ssp_frame.frame_type = SSP_TASK;
436 memcpy(scb->abort_task.ssp_frame.hashed_dest_addr,
437 task->dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
438 memcpy(scb->abort_task.ssp_frame.hashed_src_addr,
439 task->dev->port->ha->hashed_sas_addr,
440 HASHED_SAS_ADDR_SIZE);
441 scb->abort_task.ssp_frame.tptt = cpu_to_be16(0xFFFF);
442
443 memcpy(scb->abort_task.ssp_task.lun, task->ssp_task.LUN, 8);
444 scb->abort_task.ssp_task.tmf = TMF_ABORT_TASK;
445 scb->abort_task.ssp_task.tag = cpu_to_be16(0xFFFF);
446 }
447
448 scb->abort_task.sister_scb = cpu_to_le16(0xFFFF);
449 scb->abort_task.conn_handle = cpu_to_le16(
450 (u16)(unsigned long)task->dev->lldd_dev);
451 scb->abort_task.retry_count = 1;
452 scb->abort_task.index = cpu_to_le16((u16)tascb->tc_index);
453 scb->abort_task.itnl_to = cpu_to_le16(ITNL_TIMEOUT_CONST);
454
455 res = asd_enqueue_internal(ascb, asd_tmf_tasklet_complete,
456 asd_tmf_timedout);
457 if (res)
458 goto out_free;
459 wait_for_completion(&completion);
460 ASD_DPRINTK("tmf came back\n");
461
462 tascb->tag = tcs.tag;
463 tascb->tag_valid = tcs.tag_valid;
464
465 spin_lock_irqsave(&task->task_state_lock, flags);
466 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
467 spin_unlock_irqrestore(&task->task_state_lock, flags);
468 res = TMF_RESP_FUNC_COMPLETE;
469 ASD_DPRINTK("%s: task 0x%p done\n", __func__, task);
470 goto out_done;
471 }
472 spin_unlock_irqrestore(&task->task_state_lock, flags);
473
474 if (tcs.dl_opcode == TC_SSP_RESP) {
475 /* The task to be aborted has been sent to the device.
476 * We got a Response IU for the ABORT TASK TMF. */
477 if (tcs.tmf_state == TMF_RESP_FUNC_COMPLETE)
478 res = asd_clear_nexus(task);
479 else
480 res = tcs.tmf_state;
481 } else if (tcs.dl_opcode == TC_NO_ERROR &&
482 tcs.tmf_state == TMF_RESP_FUNC_FAILED) {
483 /* timeout */
484 res = TMF_RESP_FUNC_FAILED;
485 } else {
486 /* In the following we assume that the managing layer
487 * will _never_ make a mistake, when issuing ABORT
488 * TASK.
489 */
490 switch (tcs.dl_opcode) {
491 default:
492 res = asd_clear_nexus(task);
493 fallthrough;
494 case TC_NO_ERROR:
495 break;
496 /* The task hasn't been sent to the device xor
497 * we never got a (sane) Response IU for the
498 * ABORT TASK TMF.
499 */
500 case TF_NAK_RECV:
501 res = TMF_RESP_INVALID_FRAME;
502 break;
503 case TF_TMF_TASK_DONE: /* done but not reported yet */
504 res = TMF_RESP_FUNC_FAILED;
505 leftover =
506 wait_for_completion_timeout(&tascb_completion,
507 AIC94XX_SCB_TIMEOUT);
508 spin_lock_irqsave(&task->task_state_lock, flags);
509 if (leftover < 1)
510 res = TMF_RESP_FUNC_FAILED;
511 if (task->task_state_flags & SAS_TASK_STATE_DONE)
512 res = TMF_RESP_FUNC_COMPLETE;
513 spin_unlock_irqrestore(&task->task_state_lock, flags);
514 break;
515 case TF_TMF_NO_TAG:
516 case TF_TMF_TAG_FREE: /* the tag is in the free list */
517 case TF_TMF_NO_CONN_HANDLE: /* no such device */
518 res = TMF_RESP_FUNC_COMPLETE;
519 break;
520 case TF_TMF_NO_CTX: /* not in seq, or proto != SSP */
521 res = TMF_RESP_FUNC_ESUPP;
522 break;
523 }
524 }
525 out_done:
526 tascb->completion = NULL;
527 if (res == TMF_RESP_FUNC_COMPLETE) {
528 task->lldd_task = NULL;
529 mb();
530 asd_ascb_free(tascb);
531 }
532 ASD_DPRINTK("task 0x%p aborted, res: 0x%x\n", task, res);
533 return res;
534
535 out_free:
536 asd_ascb_free(ascb);
537 ASD_DPRINTK("task 0x%p aborted, res: 0x%x\n", task, res);
538 return res;
539 }
540
541 /**
542 * asd_initiate_ssp_tmf -- send a TMF to an I_T_L or I_T_L_Q nexus
543 * @dev: pointer to struct domain_device of interest
544 * @lun: pointer to u8[8] which is the LUN
545 * @tmf: the TMF to be performed (see sas_task.h or the SAS spec)
546 * @index: the transaction context of the task to be queried if QT TMF
547 *
548 * This function is used to send ABORT TASK SET, CLEAR ACA,
549 * CLEAR TASK SET, LU RESET and QUERY TASK TMFs.
550 *
551 * No SCBs should be queued to the I_T_L nexus when this SCB is
552 * pending.
553 *
554 * Returns: TMF response code (see sas_task.h or the SAS spec)
555 */
asd_initiate_ssp_tmf(struct domain_device * dev,u8 * lun,int tmf,int index)556 static int asd_initiate_ssp_tmf(struct domain_device *dev, u8 *lun,
557 int tmf, int index)
558 {
559 struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
560 struct asd_ascb *ascb;
561 int res = 1;
562 struct scb *scb;
563 DECLARE_COMPLETION_ONSTACK(completion);
564 DECLARE_TCS(tcs);
565
566 if (!(dev->tproto & SAS_PROTOCOL_SSP))
567 return TMF_RESP_FUNC_ESUPP;
568
569 ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL);
570 if (!ascb)
571 return -ENOMEM;
572
573 ascb->completion = &completion;
574 ascb->uldd_task = &tcs;
575 scb = ascb->scb;
576
577 if (tmf == TMF_QUERY_TASK)
578 scb->header.opcode = QUERY_SSP_TASK;
579 else
580 scb->header.opcode = INITIATE_SSP_TMF;
581
582 scb->ssp_tmf.proto_conn_rate = (1 << 4); /* SSP */
583 scb->ssp_tmf.proto_conn_rate |= dev->linkrate;
584 /* SSP frame header */
585 scb->ssp_tmf.ssp_frame.frame_type = SSP_TASK;
586 memcpy(scb->ssp_tmf.ssp_frame.hashed_dest_addr,
587 dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
588 memcpy(scb->ssp_tmf.ssp_frame.hashed_src_addr,
589 dev->port->ha->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
590 scb->ssp_tmf.ssp_frame.tptt = cpu_to_be16(0xFFFF);
591 /* SSP Task IU */
592 memcpy(scb->ssp_tmf.ssp_task.lun, lun, 8);
593 scb->ssp_tmf.ssp_task.tmf = tmf;
594
595 scb->ssp_tmf.sister_scb = cpu_to_le16(0xFFFF);
596 scb->ssp_tmf.conn_handle= cpu_to_le16((u16)(unsigned long)
597 dev->lldd_dev);
598 scb->ssp_tmf.retry_count = 1;
599 scb->ssp_tmf.itnl_to = cpu_to_le16(ITNL_TIMEOUT_CONST);
600 if (tmf == TMF_QUERY_TASK)
601 scb->ssp_tmf.index = cpu_to_le16(index);
602
603 res = asd_enqueue_internal(ascb, asd_tmf_tasklet_complete,
604 asd_tmf_timedout);
605 if (res)
606 goto out_err;
607 wait_for_completion(&completion);
608
609 switch (tcs.dl_opcode) {
610 case TC_NO_ERROR:
611 res = TMF_RESP_FUNC_COMPLETE;
612 break;
613 case TF_NAK_RECV:
614 res = TMF_RESP_INVALID_FRAME;
615 break;
616 case TF_TMF_TASK_DONE:
617 res = TMF_RESP_FUNC_FAILED;
618 break;
619 case TF_TMF_NO_TAG:
620 case TF_TMF_TAG_FREE: /* the tag is in the free list */
621 case TF_TMF_NO_CONN_HANDLE: /* no such device */
622 res = TMF_RESP_FUNC_COMPLETE;
623 break;
624 case TF_TMF_NO_CTX: /* not in seq, or proto != SSP */
625 res = TMF_RESP_FUNC_ESUPP;
626 break;
627 default:
628 /* Allow TMF response codes to propagate upwards */
629 res = tcs.dl_opcode;
630 break;
631 }
632 return res;
633 out_err:
634 asd_ascb_free(ascb);
635 return res;
636 }
637
asd_abort_task_set(struct domain_device * dev,u8 * lun)638 int asd_abort_task_set(struct domain_device *dev, u8 *lun)
639 {
640 int res = asd_initiate_ssp_tmf(dev, lun, TMF_ABORT_TASK_SET, 0);
641
642 if (res == TMF_RESP_FUNC_COMPLETE)
643 asd_clear_nexus_I_T_L(dev, lun);
644 return res;
645 }
646
asd_clear_task_set(struct domain_device * dev,u8 * lun)647 int asd_clear_task_set(struct domain_device *dev, u8 *lun)
648 {
649 int res = asd_initiate_ssp_tmf(dev, lun, TMF_CLEAR_TASK_SET, 0);
650
651 if (res == TMF_RESP_FUNC_COMPLETE)
652 asd_clear_nexus_I_T_L(dev, lun);
653 return res;
654 }
655
asd_lu_reset(struct domain_device * dev,u8 * lun)656 int asd_lu_reset(struct domain_device *dev, u8 *lun)
657 {
658 int res = asd_initiate_ssp_tmf(dev, lun, TMF_LU_RESET, 0);
659
660 if (res == TMF_RESP_FUNC_COMPLETE)
661 asd_clear_nexus_I_T_L(dev, lun);
662 return res;
663 }
664
665 /**
666 * asd_query_task -- send a QUERY TASK TMF to an I_T_L_Q nexus
667 * @task: pointer to sas_task struct of interest
668 *
669 * Returns: TMF_RESP_FUNC_COMPLETE if the task is not in the task set,
670 * or TMF_RESP_FUNC_SUCC if the task is in the task set.
671 *
672 * Normally the management layer sets the task to aborted state,
673 * and then calls query task and then abort task.
674 */
asd_query_task(struct sas_task * task)675 int asd_query_task(struct sas_task *task)
676 {
677 struct asd_ascb *ascb = task->lldd_task;
678 int index;
679
680 if (ascb) {
681 index = ascb->tc_index;
682 return asd_initiate_ssp_tmf(task->dev, task->ssp_task.LUN,
683 TMF_QUERY_TASK, index);
684 }
685 return TMF_RESP_FUNC_COMPLETE;
686 }
687