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Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec...
[linux-2.6-block.git] / drivers / scsi / aic94xx / aic94xx_tmf.c
CommitLineData
2908d778
JB		 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 "aic94xx.h"
29#include "aic94xx_sas.h"
30#include "aic94xx_hwi.h"
31
32/* ---------- Internal enqueue ---------- */
33
34static int asd_enqueue_internal(struct asd_ascb *ascb,
35 void (*tasklet_complete)(struct asd_ascb *,
36 struct done_list_struct *),
37 void (*timed_out)(unsigned long))
38{
39 int res;
40
41 ascb->tasklet_complete = tasklet_complete;
42 ascb->uldd_timer = 1;
43
44 ascb->timer.data = (unsigned long) ascb;
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
e2396f1e 56/* ---------- CLEAR NEXUS ---------- */
2908d778 57
e2396f1e
JB		 58struct 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 }
2908d778 72
2908d778
JB		 73
74static void asd_clear_nexus_tasklet_complete(struct asd_ascb *ascb,
75 struct done_list_struct *dl)
76{
e2396f1e 77 struct tasklet_completion_status *tcs = ascb->uldd_task;
cadbd4a5 78 ASD_DPRINTK("%s: here\n", __func__);
2908d778 79 if (!del_timer(&ascb->timer)) {
cadbd4a5 80 ASD_DPRINTK("%s: couldn't delete timer\n", __func__);
2908d778
JB		 81 return;
82 }
cadbd4a5 83 ASD_DPRINTK("%s: opcode: 0x%x\n", __func__, dl->opcode);
e2396f1e
JB		 84 tcs->dl_opcode = dl->opcode;
85 complete(ascb->completion);
86 asd_ascb_free(ascb);
2908d778
JB		 87}
88
89static void asd_clear_nexus_timedout(unsigned long data)
90{
e2396f1e
JB		 91 struct asd_ascb *ascb = (void *)data;
92 struct tasklet_completion_status *tcs = ascb->uldd_task;
2908d778 93
cadbd4a5 94 ASD_DPRINTK("%s: here\n", __func__);
e2396f1e
JB		 95 tcs->dl_opcode = TMF_RESP_FUNC_FAILED;
96 complete(ascb->completion);
2908d778
JB		 97}
98
99#define CLEAR_NEXUS_PRE \
e2396f1e
JB		 100 struct asd_ascb *ascb; \
101 struct scb *scb; \
102 int res; \
103 DECLARE_COMPLETION_ONSTACK(completion); \
104 DECLARE_TCS(tcs); \
105 \
cadbd4a5 106 ASD_DPRINTK("%s: PRE\n", __func__); \
2908d778
JB		 107 res = 1; \
108 ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL); \
109 if (!ascb) \
110 return -ENOMEM; \
111 \
e2396f1e
JB		 112 ascb->completion = &completion; \
113 ascb->uldd_task = &tcs; \
2908d778
JB		 114 scb = ascb->scb; \
115 scb->header.opcode = CLEAR_NEXUS
116
117#define CLEAR_NEXUS_POST \
cadbd4a5 118 ASD_DPRINTK("%s: POST\n", __func__); \
2908d778
JB		 119 res = asd_enqueue_internal(ascb, asd_clear_nexus_tasklet_complete, \
120 asd_clear_nexus_timedout); \
121 if (res) \
122 goto out_err; \
cadbd4a5 123 ASD_DPRINTK("%s: clear nexus posted, waiting...\n", __func__); \
e2396f1e
JB		 124 wait_for_completion(&completion); \
125 res = tcs.dl_opcode; \
2908d778
JB		 126 if (res == TC_NO_ERROR) \
127 res = TMF_RESP_FUNC_COMPLETE; \
e2396f1e 128 return res; \
2908d778
JB		 129out_err: \
130 asd_ascb_free(ascb); \
131 return res
132
133int asd_clear_nexus_ha(struct sas_ha_struct *sas_ha)
134{
135 struct asd_ha_struct *asd_ha = sas_ha->lldd_ha;
2908d778
JB		 136
137 CLEAR_NEXUS_PRE;
138 scb->clear_nexus.nexus = NEXUS_ADAPTER;
139 CLEAR_NEXUS_POST;
140}
141
142int asd_clear_nexus_port(struct asd_sas_port *port)
143{
144 struct asd_ha_struct *asd_ha = port->ha->lldd_ha;
2908d778
JB		 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
63edf49e
JB		 152enum clear_nexus_phase {
153 NEXUS_PHASE_PRE,
154 NEXUS_PHASE_POST,
155 NEXUS_PHASE_RESUME,
156};
157
158static int asd_clear_nexus_I_T(struct domain_device *dev,
159 enum clear_nexus_phase phase)
2908d778
JB		 160{
161 struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
2908d778
JB		 162
163 CLEAR_NEXUS_PRE;
164 scb->clear_nexus.nexus = NEXUS_I_T;
63edf49e
JB		 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 }
2908d778
JB		 175 scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long)
176 dev->lldd_dev);
177 CLEAR_NEXUS_POST;
178}
63edf49e
JB		 179
180int asd_I_T_nexus_reset(struct domain_device *dev)
181{
182 int res, tmp_res, i;
183 struct sas_phy *phy = sas_find_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 == 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",
71610f55 192 reset_type ? "hard" : "soft", dev_name(&phy->dev));
63edf49e
JB		 193 res = sas_phy_reset(phy, reset_type);
194 if (res == TMF_RESP_FUNC_COMPLETE) {
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 return res;
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 return TMF_RESP_FUNC_FAILED;
214}
2908d778
JB		 215
216static int asd_clear_nexus_I_T_L(struct domain_device *dev, u8 *lun)
217{
218 struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
2908d778
JB		 219
220 CLEAR_NEXUS_PRE;
221 scb->clear_nexus.nexus = NEXUS_I_T_L;
222 scb->clear_nexus.flags = SEND_Q | EXEC_Q | NOTINQ;
2908d778
JB		 223 memcpy(scb->clear_nexus.ssp_task.lun, lun, 8);
224 scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long)
225 dev->lldd_dev);
226 CLEAR_NEXUS_POST;
227}
228
229static int asd_clear_nexus_tag(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;
2908d778
JB		 233
234 CLEAR_NEXUS_PRE;
235 scb->clear_nexus.nexus = NEXUS_TAG;
236 memcpy(scb->clear_nexus.ssp_task.lun, task->ssp_task.LUN, 8);
237 scb->clear_nexus.ssp_task.tag = tascb->tag;
238 if (task->dev->tproto)
239 scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long)
240 task->dev->lldd_dev);
241 CLEAR_NEXUS_POST;
242}
243
244static int asd_clear_nexus_index(struct sas_task *task)
245{
246 struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha;
247 struct asd_ascb *tascb = task->lldd_task;
2908d778
JB		 248
249 CLEAR_NEXUS_PRE;
250 scb->clear_nexus.nexus = NEXUS_TRANS_CX;
251 if (task->dev->tproto)
252 scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long)
253 task->dev->lldd_dev);
254 scb->clear_nexus.index = cpu_to_le16(tascb->tc_index);
255 CLEAR_NEXUS_POST;
256}
257
258/* ---------- TMFs ---------- */
259
260static void asd_tmf_timedout(unsigned long data)
261{
262 struct asd_ascb *ascb = (void *) data;
e2396f1e 263 struct tasklet_completion_status *tcs = ascb->uldd_task;
2908d778
JB		 264
265 ASD_DPRINTK("tmf timed out\n");
e2396f1e
JB		 266 tcs->tmf_state = TMF_RESP_FUNC_FAILED;
267 complete(ascb->completion);
2908d778
JB		 268}
269
270static int asd_get_tmf_resp_tasklet(struct asd_ascb *ascb,
271 struct done_list_struct *dl)
272{
273 struct asd_ha_struct *asd_ha = ascb->ha;
274 unsigned long flags;
275 struct tc_resp_sb_struct {
276 __le16 index_escb;
277 u8 len_lsb;
278 u8 flags;
279 } __attribute__ ((packed)) *resp_sb = (void *) dl->status_block;
280
281 int edb_id = ((resp_sb->flags & 0x70) >> 4)-1;
282 struct asd_ascb *escb;
283 struct asd_dma_tok *edb;
284 struct ssp_frame_hdr *fh;
285 struct ssp_response_iu *ru;
286 int res = TMF_RESP_FUNC_FAILED;
287
288 ASD_DPRINTK("tmf resp tasklet\n");
289
290 spin_lock_irqsave(&asd_ha->seq.tc_index_lock, flags);
291 escb = asd_tc_index_find(&asd_ha->seq,
292 (int)le16_to_cpu(resp_sb->index_escb));
293 spin_unlock_irqrestore(&asd_ha->seq.tc_index_lock, flags);
294
295 if (!escb) {
296 ASD_DPRINTK("Uh-oh! No escb for this dl?!\n");
297 return res;
298 }
299
300 edb = asd_ha->seq.edb_arr[edb_id + escb->edb_index];
301 ascb->tag = *(__be16 *)(edb->vaddr+4);
302 fh = edb->vaddr + 16;
303 ru = edb->vaddr + 16 + sizeof(*fh);
304 res = ru->status;
305 if (ru->datapres == 1) /* Response data present */
306 res = ru->resp_data[3];
307#if 0
308 ascb->tag = fh->tag;
309#endif
310 ascb->tag_valid = 1;
311
312 asd_invalidate_edb(escb, edb_id);
313 return res;
314}
315
316static void asd_tmf_tasklet_complete(struct asd_ascb *ascb,
317 struct done_list_struct *dl)
318{
e2396f1e
JB		 319 struct tasklet_completion_status *tcs;
320
2908d778
JB		 321 if (!del_timer(&ascb->timer))
322 return;
323
e2396f1e 324 tcs = ascb->uldd_task;
2908d778
JB		 325 ASD_DPRINTK("tmf tasklet complete\n");
326
e2396f1e 327 tcs->dl_opcode = dl->opcode;
2908d778 328
e2396f1e
JB		 329 if (dl->opcode == TC_SSP_RESP) {
330 tcs->tmf_state = asd_get_tmf_resp_tasklet(ascb, dl);
331 tcs->tag_valid = ascb->tag_valid;
332 tcs->tag = ascb->tag;
333 }
334
335 complete(ascb->completion);
336 asd_ascb_free(ascb);
2908d778
JB		 337}
338
81e56ded 339static int asd_clear_nexus(struct sas_task *task)
2908d778
JB		 340{
341 int res = TMF_RESP_FUNC_FAILED;
8fdcf86a 342 int leftover;
2908d778 343 struct asd_ascb *tascb = task->lldd_task;
e2396f1e 344 DECLARE_COMPLETION_ONSTACK(completion);
2908d778
JB		 345 unsigned long flags;
346
e2396f1e
JB		 347 tascb->completion = &completion;
348
2908d778
JB		 349 ASD_DPRINTK("task not done, clearing nexus\n");
350 if (tascb->tag_valid)
351 res = asd_clear_nexus_tag(task);
352 else
353 res = asd_clear_nexus_index(task);
e2396f1e 354 leftover = wait_for_completion_timeout(&completion,
8fdcf86a 355 AIC94XX_SCB_TIMEOUT);
e2396f1e 356 tascb->completion = NULL;
2908d778
JB		 357 ASD_DPRINTK("came back from clear nexus\n");
358 spin_lock_irqsave(&task->task_state_lock, flags);
8fdcf86a
DW		 359 if (leftover < 1)
360 res = TMF_RESP_FUNC_FAILED;
2908d778
JB		 361 if (task->task_state_flags & SAS_TASK_STATE_DONE)
362 res = TMF_RESP_FUNC_COMPLETE;
363 spin_unlock_irqrestore(&task->task_state_lock, flags);
364
365 return res;
366}
367
368/**
369 * asd_abort_task -- ABORT TASK TMF
370 * @task: the task to be aborted
371 *
372 * Before calling ABORT TASK the task state flags should be ORed with
373 * SAS_TASK_STATE_ABORTED (unless SAS_TASK_STATE_DONE is set) under
374 * the task_state_lock IRQ spinlock, then ABORT TASK *must* be called.
375 *
376 * Implements the ABORT TASK TMF, I_T_L_Q nexus.
377 * Returns: SAS TMF responses (see sas_task.h),
378 * -ENOMEM,
379 * -SAS_QUEUE_FULL.
380 *
381 * When ABORT TASK returns, the caller of ABORT TASK checks first the
382 * task->task_state_flags, and then the return value of ABORT TASK.
383 *
384 * If the task has task state bit SAS_TASK_STATE_DONE set, then the
385 * task was completed successfully prior to it being aborted. The
386 * caller of ABORT TASK has responsibility to call task->task_done()
387 * xor free the task, depending on their framework. The return code
388 * is TMF_RESP_FUNC_FAILED in this case.
389 *
390 * Else the SAS_TASK_STATE_DONE bit is not set,
391 * If the return code is TMF_RESP_FUNC_COMPLETE, then
392 * the task was aborted successfully. The caller of
393 * ABORT TASK has responsibility to call task->task_done()
394 * to finish the task, xor free the task depending on their
395 * framework.
396 * else
397 * the ABORT TASK returned some kind of error. The task
398 * was _not_ cancelled. Nothing can be assumed.
399 * The caller of ABORT TASK may wish to retry.
400 */
401int asd_abort_task(struct sas_task *task)
402{
403 struct asd_ascb *tascb = task->lldd_task;
404 struct asd_ha_struct *asd_ha = tascb->ha;
405 int res = 1;
406 unsigned long flags;
407 struct asd_ascb *ascb = NULL;
408 struct scb *scb;
8fdcf86a 409 int leftover;
e2396f1e
JB		 410 DECLARE_TCS(tcs);
411 DECLARE_COMPLETION_ONSTACK(completion);
412 DECLARE_COMPLETION_ONSTACK(tascb_completion);
413
414 tascb->completion = &tascb_completion;
2908d778
JB		 415
416 spin_lock_irqsave(&task->task_state_lock, flags);
417 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
418 spin_unlock_irqrestore(&task->task_state_lock, flags);
419 res = TMF_RESP_FUNC_COMPLETE;
cadbd4a5 420 ASD_DPRINTK("%s: task 0x%p done\n", __func__, task);
2908d778
JB		 421 goto out_done;
422 }
423 spin_unlock_irqrestore(&task->task_state_lock, flags);
424
425 ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL);
426 if (!ascb)
427 return -ENOMEM;
2908d778 428
e2396f1e
JB		 429 ascb->uldd_task = &tcs;
430 ascb->completion = &completion;
431 scb = ascb->scb;
90b0c418 432 scb->header.opcode = SCB_ABORT_TASK;
2908d778
JB		 433
434 switch (task->task_proto) {
5929faf3
DW		 435 case SAS_PROTOCOL_SATA:
436 case SAS_PROTOCOL_STP:
2908d778
JB		 437 scb->abort_task.proto_conn_rate = (1 << 5); /* STP */
438 break;
5929faf3 439 case SAS_PROTOCOL_SSP:
2908d778
JB		 440 scb->abort_task.proto_conn_rate = (1 << 4); /* SSP */
441 scb->abort_task.proto_conn_rate |= task->dev->linkrate;
442 break;
5929faf3 443 case SAS_PROTOCOL_SMP:
2908d778
JB		 444 break;
445 default:
446 break;
447 }
448
5929faf3 449 if (task->task_proto == SAS_PROTOCOL_SSP) {
2908d778
JB		 450 scb->abort_task.ssp_frame.frame_type = SSP_TASK;
451 memcpy(scb->abort_task.ssp_frame.hashed_dest_addr,
452 task->dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
453 memcpy(scb->abort_task.ssp_frame.hashed_src_addr,
454 task->dev->port->ha->hashed_sas_addr,
455 HASHED_SAS_ADDR_SIZE);
456 scb->abort_task.ssp_frame.tptt = cpu_to_be16(0xFFFF);
457
458 memcpy(scb->abort_task.ssp_task.lun, task->ssp_task.LUN, 8);
459 scb->abort_task.ssp_task.tmf = TMF_ABORT_TASK;
460 scb->abort_task.ssp_task.tag = cpu_to_be16(0xFFFF);
461 }
462
463 scb->abort_task.sister_scb = cpu_to_le16(0xFFFF);
464 scb->abort_task.conn_handle = cpu_to_le16(
465 (u16)(unsigned long)task->dev->lldd_dev);
466 scb->abort_task.retry_count = 1;
467 scb->abort_task.index = cpu_to_le16((u16)tascb->tc_index);
468 scb->abort_task.itnl_to = cpu_to_le16(ITNL_TIMEOUT_CONST);
469
470 res = asd_enqueue_internal(ascb, asd_tmf_tasklet_complete,
471 asd_tmf_timedout);
472 if (res)
e2396f1e
JB		 473 goto out_free;
474 wait_for_completion(&completion);
2908d778
JB		 475 ASD_DPRINTK("tmf came back\n");
476
e2396f1e
JB		 477 tascb->tag = tcs.tag;
478 tascb->tag_valid = tcs.tag_valid;
2908d778
JB		 479
480 spin_lock_irqsave(&task->task_state_lock, flags);
481 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
482 spin_unlock_irqrestore(&task->task_state_lock, flags);
483 res = TMF_RESP_FUNC_COMPLETE;
cadbd4a5 484 ASD_DPRINTK("%s: task 0x%p done\n", __func__, task);
2908d778
JB		 485 goto out_done;
486 }
487 spin_unlock_irqrestore(&task->task_state_lock, flags);
488
e2396f1e
JB		 489 if (tcs.dl_opcode == TC_SSP_RESP) {
490 /* The task to be aborted has been sent to the device.
491 * We got a Response IU for the ABORT TASK TMF. */
492 if (tcs.tmf_state == TMF_RESP_FUNC_COMPLETE)
493 res = asd_clear_nexus(task);
494 else
495 res = tcs.tmf_state;
496 } else if (tcs.dl_opcode == TC_NO_ERROR &&
497 tcs.tmf_state == TMF_RESP_FUNC_FAILED) {
498 /* timeout */
2908d778 499 res = TMF_RESP_FUNC_FAILED;
e2396f1e
JB		 500 } else {
501 /* In the following we assume that the managing layer
502 * will _never_ make a mistake, when issuing ABORT
503 * TASK.
504 */
505 switch (tcs.dl_opcode) {
506 default:
507 res = asd_clear_nexus(task);
508 /* fallthrough */
509 case TC_NO_ERROR:
510 break;
511 /* The task hasn't been sent to the device xor
512 * we never got a (sane) Response IU for the
513 * ABORT TASK TMF.
514 */
515 case TF_NAK_RECV:
516 res = TMF_RESP_INVALID_FRAME;
517 break;
518 case TF_TMF_TASK_DONE: /* done but not reported yet */
8fdcf86a 519 res = TMF_RESP_FUNC_FAILED;
e2396f1e
JB		 520 leftover =
521 wait_for_completion_timeout(&tascb_completion,
522 AIC94XX_SCB_TIMEOUT);
523 spin_lock_irqsave(&task->task_state_lock, flags);
524 if (leftover < 1)
525 res = TMF_RESP_FUNC_FAILED;
526 if (task->task_state_flags & SAS_TASK_STATE_DONE)
527 res = TMF_RESP_FUNC_COMPLETE;
528 spin_unlock_irqrestore(&task->task_state_lock, flags);
529 break;
530 case TF_TMF_NO_TAG:
531 case TF_TMF_TAG_FREE: /* the tag is in the free list */
532 case TF_TMF_NO_CONN_HANDLE: /* no such device */
2908d778 533 res = TMF_RESP_FUNC_COMPLETE;
e2396f1e
JB		 534 break;
535 case TF_TMF_NO_CTX: /* not in seq, or proto != SSP */
536 res = TMF_RESP_FUNC_ESUPP;
537 break;
538 }
2908d778 539 }
e2396f1e
JB		 540 out_done:
541 tascb->completion = NULL;
2908d778
JB		 542 if (res == TMF_RESP_FUNC_COMPLETE) {
543 task->lldd_task = NULL;
544 mb();
545 asd_ascb_free(tascb);
546 }
e2396f1e
JB		 547 ASD_DPRINTK("task 0x%p aborted, res: 0x%x\n", task, res);
548 return res;
549
550 out_free:
2908d778
JB		 551 asd_ascb_free(ascb);
552 ASD_DPRINTK("task 0x%p aborted, res: 0x%x\n", task, res);
553 return res;
554}
555
556/**
557 * asd_initiate_ssp_tmf -- send a TMF to an I_T_L or I_T_L_Q nexus
558 * @dev: pointer to struct domain_device of interest
559 * @lun: pointer to u8[8] which is the LUN
560 * @tmf: the TMF to be performed (see sas_task.h or the SAS spec)
561 * @index: the transaction context of the task to be queried if QT TMF
562 *
563 * This function is used to send ABORT TASK SET, CLEAR ACA,
564 * CLEAR TASK SET, LU RESET and QUERY TASK TMFs.
565 *
566 * No SCBs should be queued to the I_T_L nexus when this SCB is
567 * pending.
568 *
569 * Returns: TMF response code (see sas_task.h or the SAS spec)
570 */
571static int asd_initiate_ssp_tmf(struct domain_device *dev, u8 *lun,
572 int tmf, int index)
573{
574 struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
575 struct asd_ascb *ascb;
576 int res = 1;
577 struct scb *scb;
e2396f1e
JB		 578 DECLARE_COMPLETION_ONSTACK(completion);
579 DECLARE_TCS(tcs);
2908d778 580
5929faf3 581 if (!(dev->tproto & SAS_PROTOCOL_SSP))
2908d778
JB		 582 return TMF_RESP_FUNC_ESUPP;
583
584 ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL);
585 if (!ascb)
586 return -ENOMEM;
e2396f1e
JB		 587
588 ascb->completion = &completion;
589 ascb->uldd_task = &tcs;
2908d778
JB		 590 scb = ascb->scb;
591
592 if (tmf == TMF_QUERY_TASK)
593 scb->header.opcode = QUERY_SSP_TASK;
594 else
595 scb->header.opcode = INITIATE_SSP_TMF;
596
597 scb->ssp_tmf.proto_conn_rate = (1 << 4); /* SSP */
598 scb->ssp_tmf.proto_conn_rate |= dev->linkrate;
599 /* SSP frame header */
600 scb->ssp_tmf.ssp_frame.frame_type = SSP_TASK;
601 memcpy(scb->ssp_tmf.ssp_frame.hashed_dest_addr,
602 dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
603 memcpy(scb->ssp_tmf.ssp_frame.hashed_src_addr,
604 dev->port->ha->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
605 scb->ssp_tmf.ssp_frame.tptt = cpu_to_be16(0xFFFF);
606 /* SSP Task IU */
607 memcpy(scb->ssp_tmf.ssp_task.lun, lun, 8);
608 scb->ssp_tmf.ssp_task.tmf = tmf;
609
610 scb->ssp_tmf.sister_scb = cpu_to_le16(0xFFFF);
611 scb->ssp_tmf.conn_handle= cpu_to_le16((u16)(unsigned long)
612 dev->lldd_dev);
613 scb->ssp_tmf.retry_count = 1;
614 scb->ssp_tmf.itnl_to = cpu_to_le16(ITNL_TIMEOUT_CONST);
615 if (tmf == TMF_QUERY_TASK)
616 scb->ssp_tmf.index = cpu_to_le16(index);
617
618 res = asd_enqueue_internal(ascb, asd_tmf_tasklet_complete,
619 asd_tmf_timedout);
620 if (res)
621 goto out_err;
e2396f1e 622 wait_for_completion(&completion);
2908d778 623
e2396f1e
JB		 624 switch (tcs.dl_opcode) {
625 case TC_NO_ERROR:
2908d778
JB		 626 res = TMF_RESP_FUNC_COMPLETE;
627 break;
e2396f1e 628 case TF_NAK_RECV:
2908d778
JB		 629 res = TMF_RESP_INVALID_FRAME;
630 break;
e2396f1e 631 case TF_TMF_TASK_DONE:
2908d778
JB		 632 res = TMF_RESP_FUNC_FAILED;
633 break;
e2396f1e
JB		 634 case TF_TMF_NO_TAG:
635 case TF_TMF_TAG_FREE: /* the tag is in the free list */
636 case TF_TMF_NO_CONN_HANDLE: /* no such device */
2908d778
JB		 637 res = TMF_RESP_FUNC_COMPLETE;
638 break;
e2396f1e 639 case TF_TMF_NO_CTX: /* not in seq, or proto != SSP */
2908d778
JB		 640 res = TMF_RESP_FUNC_ESUPP;
641 break;
642 default:
058e2c47 643 /* Allow TMF response codes to propagate upwards */
e2396f1e 644 res = tcs.dl_opcode;
2908d778
JB		 645 break;
646 }
e2396f1e 647 return res;
2908d778
JB		 648out_err:
649 asd_ascb_free(ascb);
650 return res;
651}
652
653int asd_abort_task_set(struct domain_device *dev, u8 *lun)
654{
655 int res = asd_initiate_ssp_tmf(dev, lun, TMF_ABORT_TASK_SET, 0);
656
657 if (res == TMF_RESP_FUNC_COMPLETE)
658 asd_clear_nexus_I_T_L(dev, lun);
659 return res;
660}
661
662int asd_clear_aca(struct domain_device *dev, u8 *lun)
663{
664 int res = asd_initiate_ssp_tmf(dev, lun, TMF_CLEAR_ACA, 0);
665
666 if (res == TMF_RESP_FUNC_COMPLETE)
667 asd_clear_nexus_I_T_L(dev, lun);
668 return res;
669}
670
671int asd_clear_task_set(struct domain_device *dev, u8 *lun)
672{
673 int res = asd_initiate_ssp_tmf(dev, lun, TMF_CLEAR_TASK_SET, 0);
674
675 if (res == TMF_RESP_FUNC_COMPLETE)
676 asd_clear_nexus_I_T_L(dev, lun);
677 return res;
678}
679
680int asd_lu_reset(struct domain_device *dev, u8 *lun)
681{
682 int res = asd_initiate_ssp_tmf(dev, lun, TMF_LU_RESET, 0);
683
684 if (res == TMF_RESP_FUNC_COMPLETE)
685 asd_clear_nexus_I_T_L(dev, lun);
686 return res;
687}
688
689/**
690 * asd_query_task -- send a QUERY TASK TMF to an I_T_L_Q nexus
691 * task: pointer to sas_task struct of interest
692 *
693 * Returns: TMF_RESP_FUNC_COMPLETE if the task is not in the task set,
694 * or TMF_RESP_FUNC_SUCC if the task is in the task set.
695 *
696 * Normally the management layer sets the task to aborted state,
697 * and then calls query task and then abort task.
698 */
699int asd_query_task(struct sas_task *task)
700{
701 struct asd_ascb *ascb = task->lldd_task;
702 int index;
703
704 if (ascb) {
705 index = ascb->tc_index;
706 return asd_initiate_ssp_tmf(task->dev, task->ssp_task.LUN,
707 TMF_QUERY_TASK, index);
708 }
709 return TMF_RESP_FUNC_COMPLETE;
710}
Linux 6.x block layer and io_uring tree(s)