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Linux 4.18.10
[linux/fpc-iii.git] / drivers / scsi / aic94xx / aic94xx_tmf.c
blob2a01702d5ba77ffcdee48e56d47c71646fd2f8fe
1 /*
2 * Aic94xx Task Management Functions
3 *
4 * Copyright (C) 2005 Adaptec, Inc. All rights reserved.
5 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
6 *
7 * This file is licensed under GPLv2.
8 *
9 * This file is part of the aic94xx driver.
10 *
11 * The aic94xx driver is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; version 2 of the
14 * License.
15 *
16 * The aic94xx driver is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with the aic94xx driver; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
24 *
25 */
26
27 #include <linux/spinlock.h>
28 #include <linux/gfp.h>
29 #include "aic94xx.h"
30 #include "aic94xx_sas.h"
31 #include "aic94xx_hwi.h"
32
33 /* ---------- Internal enqueue ---------- */
34
35 static int asd_enqueue_internal(struct asd_ascb *ascb,
36 void (*tasklet_complete)(struct asd_ascb *,
37 struct done_list_struct *),
38 void (*timed_out)(struct timer_list *t))
39 {
40 int res;
41
42 ascb->tasklet_complete = tasklet_complete;
43 ascb->uldd_timer = 1;
44
45 ascb->timer.function = timed_out;
46 ascb->timer.expires = jiffies + AIC94XX_SCB_TIMEOUT;
47
48 add_timer(&ascb->timer);
49
50 res = asd_post_ascb_list(ascb->ha, ascb, 1);
51 if (unlikely(res))
52 del_timer(&ascb->timer);
53 return res;
54 }
55
56 /* ---------- CLEAR NEXUS ---------- */
57
58 struct tasklet_completion_status {
59 int dl_opcode;
60 int tmf_state;
61 u8 tag_valid:1;
62 __be16 tag;
63 };
64
65 #define DECLARE_TCS(tcs) \
66 struct tasklet_completion_status tcs = { \
67 .dl_opcode = 0, \
68 .tmf_state = 0, \
69 .tag_valid = 0, \
70 .tag = 0, \
71 }
72
73
74 static void asd_clear_nexus_tasklet_complete(struct asd_ascb *ascb,
75 struct done_list_struct *dl)
76 {
77 struct tasklet_completion_status *tcs = ascb->uldd_task;
78 ASD_DPRINTK("%s: here\n", __func__);
79 if (!del_timer(&ascb->timer)) {
80 ASD_DPRINTK("%s: couldn't delete timer\n", __func__);
81 return;
82 }
83 ASD_DPRINTK("%s: opcode: 0x%x\n", __func__, dl->opcode);
84 tcs->dl_opcode = dl->opcode;
85 complete(ascb->completion);
86 asd_ascb_free(ascb);
87 }
88
89 static void asd_clear_nexus_timedout(struct timer_list *t)
90 {
91 struct asd_ascb *ascb = from_timer(ascb, t, timer);
92 struct tasklet_completion_status *tcs = ascb->uldd_task;
93
94 ASD_DPRINTK("%s: here\n", __func__);
95 tcs->dl_opcode = TMF_RESP_FUNC_FAILED;
96 complete(ascb->completion);
97 }
98
99 #define CLEAR_NEXUS_PRE \
100 struct asd_ascb *ascb; \
101 struct scb *scb; \
102 int res; \
103 DECLARE_COMPLETION_ONSTACK(completion); \
104 DECLARE_TCS(tcs); \
105 \
106 ASD_DPRINTK("%s: PRE\n", __func__); \
107 res = 1; \
108 ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL); \
109 if (!ascb) \
110 return -ENOMEM; \
111 \
112 ascb->completion = &completion; \
113 ascb->uldd_task = &tcs; \
114 scb = ascb->scb; \
115 scb->header.opcode = CLEAR_NEXUS
116
117 #define CLEAR_NEXUS_POST \
118 ASD_DPRINTK("%s: POST\n", __func__); \
119 res = asd_enqueue_internal(ascb, asd_clear_nexus_tasklet_complete, \
120 asd_clear_nexus_timedout); \
121 if (res) \
122 goto out_err; \
123 ASD_DPRINTK("%s: clear nexus posted, waiting...\n", __func__); \
124 wait_for_completion(&completion); \
125 res = tcs.dl_opcode; \
126 if (res == TC_NO_ERROR) \
127 res = TMF_RESP_FUNC_COMPLETE; \
128 return res; \
129 out_err: \
130 asd_ascb_free(ascb); \
131 return res
132
133 int asd_clear_nexus_ha(struct sas_ha_struct *sas_ha)
134 {
135 struct asd_ha_struct *asd_ha = sas_ha->lldd_ha;
136
137 CLEAR_NEXUS_PRE;
138 scb->clear_nexus.nexus = NEXUS_ADAPTER;
139 CLEAR_NEXUS_POST;
140 }
141
142 int asd_clear_nexus_port(struct asd_sas_port *port)
143 {
144 struct asd_ha_struct *asd_ha = port->ha->lldd_ha;
145
146 CLEAR_NEXUS_PRE;
147 scb->clear_nexus.nexus = NEXUS_PORT;
148 scb->clear_nexus.conn_mask = port->phy_mask;
149 CLEAR_NEXUS_POST;
150 }
151
152 enum clear_nexus_phase {
153 NEXUS_PHASE_PRE,
154 NEXUS_PHASE_POST,
155 NEXUS_PHASE_RESUME,
156 };
157
158 static int asd_clear_nexus_I_T(struct domain_device *dev,
159 enum clear_nexus_phase phase)
160 {
161 struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
162
163 CLEAR_NEXUS_PRE;
164 scb->clear_nexus.nexus = NEXUS_I_T;
165 switch (phase) {
166 case NEXUS_PHASE_PRE:
167 scb->clear_nexus.flags = EXEC_Q | SUSPEND_TX;
168 break;
169 case NEXUS_PHASE_POST:
170 scb->clear_nexus.flags = SEND_Q | NOTINQ;
171 break;
172 case NEXUS_PHASE_RESUME:
173 scb->clear_nexus.flags = RESUME_TX;
174 }
175 scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long)
176 dev->lldd_dev);
177 CLEAR_NEXUS_POST;
178 }
179
180 int asd_I_T_nexus_reset(struct domain_device *dev)
181 {
182 int res, tmp_res, i;
183 struct sas_phy *phy = sas_get_local_phy(dev);
184 /* Standard mandates link reset for ATA (type 0) and
185 * hard reset for SSP (type 1) */
186 int reset_type = (dev->dev_type == SAS_SATA_DEV ||
187 (dev->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
188
189 asd_clear_nexus_I_T(dev, NEXUS_PHASE_PRE);
190 /* send a hard reset */
191 ASD_DPRINTK("sending %s reset to %s\n",
192 reset_type ? "hard" : "soft", dev_name(&phy->dev));
193 res = sas_phy_reset(phy, reset_type);
194 if (res == TMF_RESP_FUNC_COMPLETE || res == -ENODEV) {
195 /* wait for the maximum settle time */
196 msleep(500);
197 /* clear all outstanding commands (keep nexus suspended) */
198 asd_clear_nexus_I_T(dev, NEXUS_PHASE_POST);
199 }
200 for (i = 0 ; i < 3; i++) {
201 tmp_res = asd_clear_nexus_I_T(dev, NEXUS_PHASE_RESUME);
202 if (tmp_res == TC_RESUME)
203 goto out;
204 msleep(500);
205 }
206
207 /* This is a bit of a problem: the sequencer is still suspended
208 * and is refusing to resume. Hope it will resume on a bigger hammer
209 * or the disk is lost */
210 dev_printk(KERN_ERR, &phy->dev,
211 "Failed to resume nexus after reset 0x%x\n", tmp_res);
212
213 res = TMF_RESP_FUNC_FAILED;
214 out:
215 sas_put_local_phy(phy);
216 return res;
217 }
218
219 static int asd_clear_nexus_I_T_L(struct domain_device *dev, u8 *lun)
220 {
221 struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
222
223 CLEAR_NEXUS_PRE;
224 scb->clear_nexus.nexus = NEXUS_I_T_L;
225 scb->clear_nexus.flags = SEND_Q | EXEC_Q | NOTINQ;
226 memcpy(scb->clear_nexus.ssp_task.lun, lun, 8);
227 scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long)
228 dev->lldd_dev);
229 CLEAR_NEXUS_POST;
230 }
231
232 static int asd_clear_nexus_tag(struct sas_task *task)
233 {
234 struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha;
235 struct asd_ascb *tascb = task->lldd_task;
236
237 CLEAR_NEXUS_PRE;
238 scb->clear_nexus.nexus = NEXUS_TAG;
239 memcpy(scb->clear_nexus.ssp_task.lun, task->ssp_task.LUN, 8);
240 scb->clear_nexus.ssp_task.tag = tascb->tag;
241 if (task->dev->tproto)
242 scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long)
243 task->dev->lldd_dev);
244 CLEAR_NEXUS_POST;
245 }
246
247 static int asd_clear_nexus_index(struct sas_task *task)
248 {
249 struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha;
250 struct asd_ascb *tascb = task->lldd_task;
251
252 CLEAR_NEXUS_PRE;
253 scb->clear_nexus.nexus = NEXUS_TRANS_CX;
254 if (task->dev->tproto)
255 scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long)
256 task->dev->lldd_dev);
257 scb->clear_nexus.index = cpu_to_le16(tascb->tc_index);
258 CLEAR_NEXUS_POST;
259 }
260
261 /* ---------- TMFs ---------- */
262
263 static void asd_tmf_timedout(struct timer_list *t)
264 {
265 struct asd_ascb *ascb = from_timer(ascb, t, timer);
266 struct tasklet_completion_status *tcs = ascb->uldd_task;
267
268 ASD_DPRINTK("tmf timed out\n");
269 tcs->tmf_state = TMF_RESP_FUNC_FAILED;
270 complete(ascb->completion);
271 }
272
273 static int asd_get_tmf_resp_tasklet(struct asd_ascb *ascb,
274 struct done_list_struct *dl)
275 {
276 struct asd_ha_struct *asd_ha = ascb->ha;
277 unsigned long flags;
278 struct tc_resp_sb_struct {
279 __le16 index_escb;
280 u8 len_lsb;
281 u8 flags;
282 } __attribute__ ((packed)) *resp_sb = (void *) dl->status_block;
283
284 int edb_id = ((resp_sb->flags & 0x70) >> 4)-1;
285 struct asd_ascb *escb;
286 struct asd_dma_tok *edb;
287 struct ssp_frame_hdr *fh;
288 struct ssp_response_iu *ru;
289 int res = TMF_RESP_FUNC_FAILED;
290
291 ASD_DPRINTK("tmf resp tasklet\n");
292
293 spin_lock_irqsave(&asd_ha->seq.tc_index_lock, flags);
294 escb = asd_tc_index_find(&asd_ha->seq,
295 (int)le16_to_cpu(resp_sb->index_escb));
296 spin_unlock_irqrestore(&asd_ha->seq.tc_index_lock, flags);
297
298 if (!escb) {
299 ASD_DPRINTK("Uh-oh! No escb for this dl?!\n");
300 return res;
301 }
302
303 edb = asd_ha->seq.edb_arr[edb_id + escb->edb_index];
304 ascb->tag = *(__be16 *)(edb->vaddr+4);
305 fh = edb->vaddr + 16;
306 ru = edb->vaddr + 16 + sizeof(*fh);
307 res = ru->status;
308 if (ru->datapres == 1) /* Response data present */
309 res = ru->resp_data[3];
310 #if 0
311 ascb->tag = fh->tag;
312 #endif
313 ascb->tag_valid = 1;
314
315 asd_invalidate_edb(escb, edb_id);
316 return res;
317 }
318
319 static void asd_tmf_tasklet_complete(struct asd_ascb *ascb,
320 struct done_list_struct *dl)
321 {
322 struct tasklet_completion_status *tcs;
323
324 if (!del_timer(&ascb->timer))
325 return;
326
327 tcs = ascb->uldd_task;
328 ASD_DPRINTK("tmf tasklet complete\n");
329
330 tcs->dl_opcode = dl->opcode;
331
332 if (dl->opcode == TC_SSP_RESP) {
333 tcs->tmf_state = asd_get_tmf_resp_tasklet(ascb, dl);
334 tcs->tag_valid = ascb->tag_valid;
335 tcs->tag = ascb->tag;
336 }
337
338 complete(ascb->completion);
339 asd_ascb_free(ascb);
340 }
341
342 static int asd_clear_nexus(struct sas_task *task)
343 {
344 int res = TMF_RESP_FUNC_FAILED;
345 int leftover;
346 struct asd_ascb *tascb = task->lldd_task;
347 DECLARE_COMPLETION_ONSTACK(completion);
348 unsigned long flags;
349
350 tascb->completion = &completion;
351
352 ASD_DPRINTK("task not done, clearing nexus\n");
353 if (tascb->tag_valid)
354 res = asd_clear_nexus_tag(task);
355 else
356 res = asd_clear_nexus_index(task);
357 leftover = wait_for_completion_timeout(&completion,
358 AIC94XX_SCB_TIMEOUT);
359 tascb->completion = NULL;
360 ASD_DPRINTK("came back from clear nexus\n");
361 spin_lock_irqsave(&task->task_state_lock, flags);
362 if (leftover < 1)
363 res = TMF_RESP_FUNC_FAILED;
364 if (task->task_state_flags & SAS_TASK_STATE_DONE)
365 res = TMF_RESP_FUNC_COMPLETE;
366 spin_unlock_irqrestore(&task->task_state_lock, flags);
367
368 return res;
369 }
370
371 /**
372 * asd_abort_task -- ABORT TASK TMF
373 * @task: the task to be aborted
374 *
375 * Before calling ABORT TASK the task state flags should be ORed with
376 * SAS_TASK_STATE_ABORTED (unless SAS_TASK_STATE_DONE is set) under
377 * the task_state_lock IRQ spinlock, then ABORT TASK *must* be called.
378 *
379 * Implements the ABORT TASK TMF, I_T_L_Q nexus.
380 * Returns: SAS TMF responses (see sas_task.h),
381 * -ENOMEM,
382 * -SAS_QUEUE_FULL.
383 *
384 * When ABORT TASK returns, the caller of ABORT TASK checks first the
385 * task->task_state_flags, and then the return value of ABORT TASK.
386 *
387 * If the task has task state bit SAS_TASK_STATE_DONE set, then the
388 * task was completed successfully prior to it being aborted. The
389 * caller of ABORT TASK has responsibility to call task->task_done()
390 * xor free the task, depending on their framework. The return code
391 * is TMF_RESP_FUNC_FAILED in this case.
392 *
393 * Else the SAS_TASK_STATE_DONE bit is not set,
394 * If the return code is TMF_RESP_FUNC_COMPLETE, then
395 * the task was aborted successfully. The caller of
396 * ABORT TASK has responsibility to call task->task_done()
397 * to finish the task, xor free the task depending on their
398 * framework.
399 * else
400 * the ABORT TASK returned some kind of error. The task
401 * was _not_ cancelled. Nothing can be assumed.
402 * The caller of ABORT TASK may wish to retry.
403 */
404 int asd_abort_task(struct sas_task *task)
405 {
406 struct asd_ascb *tascb = task->lldd_task;
407 struct asd_ha_struct *asd_ha = tascb->ha;
408 int res = 1;
409 unsigned long flags;
410 struct asd_ascb *ascb = NULL;
411 struct scb *scb;
412 int leftover;
413 DECLARE_TCS(tcs);
414 DECLARE_COMPLETION_ONSTACK(completion);
415 DECLARE_COMPLETION_ONSTACK(tascb_completion);
416
417 tascb->completion = &tascb_completion;
418
419 spin_lock_irqsave(&task->task_state_lock, flags);
420 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
421 spin_unlock_irqrestore(&task->task_state_lock, flags);
422 res = TMF_RESP_FUNC_COMPLETE;
423 ASD_DPRINTK("%s: task 0x%p done\n", __func__, task);
424 goto out_done;
425 }
426 spin_unlock_irqrestore(&task->task_state_lock, flags);
427
428 ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL);
429 if (!ascb)
430 return -ENOMEM;
431
432 ascb->uldd_task = &tcs;
433 ascb->completion = &completion;
434 scb = ascb->scb;
435 scb->header.opcode = SCB_ABORT_TASK;
436
437 switch (task->task_proto) {
438 case SAS_PROTOCOL_SATA:
439 case SAS_PROTOCOL_STP:
440 scb->abort_task.proto_conn_rate = (1 << 5); /* STP */
441 break;
442 case SAS_PROTOCOL_SSP:
443 scb->abort_task.proto_conn_rate = (1 << 4); /* SSP */
444 scb->abort_task.proto_conn_rate |= task->dev->linkrate;
445 break;
446 case SAS_PROTOCOL_SMP:
447 break;
448 default:
449 break;
450 }
451
452 if (task->task_proto == SAS_PROTOCOL_SSP) {
453 scb->abort_task.ssp_frame.frame_type = SSP_TASK;
454 memcpy(scb->abort_task.ssp_frame.hashed_dest_addr,
455 task->dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
456 memcpy(scb->abort_task.ssp_frame.hashed_src_addr,
457 task->dev->port->ha->hashed_sas_addr,
458 HASHED_SAS_ADDR_SIZE);
459 scb->abort_task.ssp_frame.tptt = cpu_to_be16(0xFFFF);
460
461 memcpy(scb->abort_task.ssp_task.lun, task->ssp_task.LUN, 8);
462 scb->abort_task.ssp_task.tmf = TMF_ABORT_TASK;
463 scb->abort_task.ssp_task.tag = cpu_to_be16(0xFFFF);
464 }
465
466 scb->abort_task.sister_scb = cpu_to_le16(0xFFFF);
467 scb->abort_task.conn_handle = cpu_to_le16(
468 (u16)(unsigned long)task->dev->lldd_dev);
469 scb->abort_task.retry_count = 1;
470 scb->abort_task.index = cpu_to_le16((u16)tascb->tc_index);
471 scb->abort_task.itnl_to = cpu_to_le16(ITNL_TIMEOUT_CONST);
472
473 res = asd_enqueue_internal(ascb, asd_tmf_tasklet_complete,
474 asd_tmf_timedout);
475 if (res)
476 goto out_free;
477 wait_for_completion(&completion);
478 ASD_DPRINTK("tmf came back\n");
479
480 tascb->tag = tcs.tag;
481 tascb->tag_valid = tcs.tag_valid;
482
483 spin_lock_irqsave(&task->task_state_lock, flags);
484 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
485 spin_unlock_irqrestore(&task->task_state_lock, flags);
486 res = TMF_RESP_FUNC_COMPLETE;
487 ASD_DPRINTK("%s: task 0x%p done\n", __func__, task);
488 goto out_done;
489 }
490 spin_unlock_irqrestore(&task->task_state_lock, flags);
491
492 if (tcs.dl_opcode == TC_SSP_RESP) {
493 /* The task to be aborted has been sent to the device.
494 * We got a Response IU for the ABORT TASK TMF. */
495 if (tcs.tmf_state == TMF_RESP_FUNC_COMPLETE)
496 res = asd_clear_nexus(task);
497 else
498 res = tcs.tmf_state;
499 } else if (tcs.dl_opcode == TC_NO_ERROR &&
500 tcs.tmf_state == TMF_RESP_FUNC_FAILED) {
501 /* timeout */
502 res = TMF_RESP_FUNC_FAILED;
503 } else {
504 /* In the following we assume that the managing layer
505 * will _never_ make a mistake, when issuing ABORT
506 * TASK.
507 */
508 switch (tcs.dl_opcode) {
509 default:
510 res = asd_clear_nexus(task);
511 /* fallthrough */
512 case TC_NO_ERROR:
513 break;
514 /* The task hasn't been sent to the device xor
515 * we never got a (sane) Response IU for the
516 * ABORT TASK TMF.
517 */
518 case TF_NAK_RECV:
519 res = TMF_RESP_INVALID_FRAME;
520 break;
521 case TF_TMF_TASK_DONE: /* done but not reported yet */
522 res = TMF_RESP_FUNC_FAILED;
523 leftover =
524 wait_for_completion_timeout(&tascb_completion,
525 AIC94XX_SCB_TIMEOUT);
526 spin_lock_irqsave(&task->task_state_lock, flags);
527 if (leftover < 1)
528 res = TMF_RESP_FUNC_FAILED;
529 if (task->task_state_flags & SAS_TASK_STATE_DONE)
530 res = TMF_RESP_FUNC_COMPLETE;
531 spin_unlock_irqrestore(&task->task_state_lock, flags);
532 break;
533 case TF_TMF_NO_TAG:
534 case TF_TMF_TAG_FREE: /* the tag is in the free list */
535 case TF_TMF_NO_CONN_HANDLE: /* no such device */
536 res = TMF_RESP_FUNC_COMPLETE;
537 break;
538 case TF_TMF_NO_CTX: /* not in seq, or proto != SSP */
539 res = TMF_RESP_FUNC_ESUPP;
540 break;
541 }
542 }
543 out_done:
544 tascb->completion = NULL;
545 if (res == TMF_RESP_FUNC_COMPLETE) {
546 task->lldd_task = NULL;
547 mb();
548 asd_ascb_free(tascb);
549 }
550 ASD_DPRINTK("task 0x%p aborted, res: 0x%x\n", task, res);
551 return res;
552
553 out_free:
554 asd_ascb_free(ascb);
555 ASD_DPRINTK("task 0x%p aborted, res: 0x%x\n", task, res);
556 return res;
557 }
558
559 /**
560 * asd_initiate_ssp_tmf -- send a TMF to an I_T_L or I_T_L_Q nexus
561 * @dev: pointer to struct domain_device of interest
562 * @lun: pointer to u8[8] which is the LUN
563 * @tmf: the TMF to be performed (see sas_task.h or the SAS spec)
564 * @index: the transaction context of the task to be queried if QT TMF
565 *
566 * This function is used to send ABORT TASK SET, CLEAR ACA,
567 * CLEAR TASK SET, LU RESET and QUERY TASK TMFs.
568 *
569 * No SCBs should be queued to the I_T_L nexus when this SCB is
570 * pending.
571 *
572 * Returns: TMF response code (see sas_task.h or the SAS spec)
573 */
574 static int asd_initiate_ssp_tmf(struct domain_device *dev, u8 *lun,
575 int tmf, int index)
576 {
577 struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
578 struct asd_ascb *ascb;
579 int res = 1;
580 struct scb *scb;
581 DECLARE_COMPLETION_ONSTACK(completion);
582 DECLARE_TCS(tcs);
583
584 if (!(dev->tproto & SAS_PROTOCOL_SSP))
585 return TMF_RESP_FUNC_ESUPP;
586
587 ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL);
588 if (!ascb)
589 return -ENOMEM;
590
591 ascb->completion = &completion;
592 ascb->uldd_task = &tcs;
593 scb = ascb->scb;
594
595 if (tmf == TMF_QUERY_TASK)
596 scb->header.opcode = QUERY_SSP_TASK;
597 else
598 scb->header.opcode = INITIATE_SSP_TMF;
599
600 scb->ssp_tmf.proto_conn_rate = (1 << 4); /* SSP */
601 scb->ssp_tmf.proto_conn_rate |= dev->linkrate;
602 /* SSP frame header */
603 scb->ssp_tmf.ssp_frame.frame_type = SSP_TASK;
604 memcpy(scb->ssp_tmf.ssp_frame.hashed_dest_addr,
605 dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
606 memcpy(scb->ssp_tmf.ssp_frame.hashed_src_addr,
607 dev->port->ha->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
608 scb->ssp_tmf.ssp_frame.tptt = cpu_to_be16(0xFFFF);
609 /* SSP Task IU */
610 memcpy(scb->ssp_tmf.ssp_task.lun, lun, 8);
611 scb->ssp_tmf.ssp_task.tmf = tmf;
612
613 scb->ssp_tmf.sister_scb = cpu_to_le16(0xFFFF);
614 scb->ssp_tmf.conn_handle= cpu_to_le16((u16)(unsigned long)
615 dev->lldd_dev);
616 scb->ssp_tmf.retry_count = 1;
617 scb->ssp_tmf.itnl_to = cpu_to_le16(ITNL_TIMEOUT_CONST);
618 if (tmf == TMF_QUERY_TASK)
619 scb->ssp_tmf.index = cpu_to_le16(index);
620
621 res = asd_enqueue_internal(ascb, asd_tmf_tasklet_complete,
622 asd_tmf_timedout);
623 if (res)
624 goto out_err;
625 wait_for_completion(&completion);
626
627 switch (tcs.dl_opcode) {
628 case TC_NO_ERROR:
629 res = TMF_RESP_FUNC_COMPLETE;
630 break;
631 case TF_NAK_RECV:
632 res = TMF_RESP_INVALID_FRAME;
633 break;
634 case TF_TMF_TASK_DONE:
635 res = TMF_RESP_FUNC_FAILED;
636 break;
637 case TF_TMF_NO_TAG:
638 case TF_TMF_TAG_FREE: /* the tag is in the free list */
639 case TF_TMF_NO_CONN_HANDLE: /* no such device */
640 res = TMF_RESP_FUNC_COMPLETE;
641 break;
642 case TF_TMF_NO_CTX: /* not in seq, or proto != SSP */
643 res = TMF_RESP_FUNC_ESUPP;
644 break;
645 default:
646 /* Allow TMF response codes to propagate upwards */
647 res = tcs.dl_opcode;
648 break;
649 }
650 return res;
651 out_err:
652 asd_ascb_free(ascb);
653 return res;
654 }
655
656 int asd_abort_task_set(struct domain_device *dev, u8 *lun)
657 {
658 int res = asd_initiate_ssp_tmf(dev, lun, TMF_ABORT_TASK_SET, 0);
659
660 if (res == TMF_RESP_FUNC_COMPLETE)
661 asd_clear_nexus_I_T_L(dev, lun);
662 return res;
663 }
664
665 int asd_clear_aca(struct domain_device *dev, u8 *lun)
666 {
667 int res = asd_initiate_ssp_tmf(dev, lun, TMF_CLEAR_ACA, 0);
668
669 if (res == TMF_RESP_FUNC_COMPLETE)
670 asd_clear_nexus_I_T_L(dev, lun);
671 return res;
672 }
673
674 int asd_clear_task_set(struct domain_device *dev, u8 *lun)
675 {
676 int res = asd_initiate_ssp_tmf(dev, lun, TMF_CLEAR_TASK_SET, 0);
677
678 if (res == TMF_RESP_FUNC_COMPLETE)
679 asd_clear_nexus_I_T_L(dev, lun);
680 return res;
681 }
682
683 int asd_lu_reset(struct domain_device *dev, u8 *lun)
684 {
685 int res = asd_initiate_ssp_tmf(dev, lun, TMF_LU_RESET, 0);
686
687 if (res == TMF_RESP_FUNC_COMPLETE)
688 asd_clear_nexus_I_T_L(dev, lun);
689 return res;
690 }
691
692 /**
693 * asd_query_task -- send a QUERY TASK TMF to an I_T_L_Q nexus
694 * task: pointer to sas_task struct of interest
695 *
696 * Returns: TMF_RESP_FUNC_COMPLETE if the task is not in the task set,
697 * or TMF_RESP_FUNC_SUCC if the task is in the task set.
698 *
699 * Normally the management layer sets the task to aborted state,
700 * and then calls query task and then abort task.
701 */
702 int asd_query_task(struct sas_task *task)
703 {
704 struct asd_ascb *ascb = task->lldd_task;
705 int index;
706
707 if (ascb) {
708 index = ascb->tc_index;
709 return asd_initiate_ssp_tmf(task->dev, task->ssp_task.LUN,
710 TMF_QUERY_TASK, index);
711 }
712 return TMF_RESP_FUNC_COMPLETE;
713 }
Linux with added FPC-III support