projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
i40e: Implement ndo_features_check()
[deliverable/linux.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>
5a0e3ad6 28#include <linux/gfp.h>
2908d778
JB		 29#include "aic94xx.h"
30#include "aic94xx_sas.h"
31#include "aic94xx_hwi.h"
32
33/* ---------- Internal enqueue ---------- */
34
35static int asd_enqueue_internal(struct asd_ascb *ascb,
36 void (*tasklet_complete)(struct asd_ascb *,
37 struct done_list_struct *),
38 void (*timed_out)(unsigned long))
39{
40 int res;
41
42 ascb->tasklet_complete = tasklet_complete;
43 ascb->uldd_timer = 1;
44
45 ascb->timer.data = (unsigned long) ascb;
46 ascb->timer.function = timed_out;
47 ascb->timer.expires = jiffies + AIC94XX_SCB_TIMEOUT;
48
49 add_timer(&ascb->timer);
50
51 res = asd_post_ascb_list(ascb->ha, ascb, 1);
52 if (unlikely(res))
53 del_timer(&ascb->timer);
54 return res;
55}
56
e2396f1e 57/* ---------- CLEAR NEXUS ---------- */
2908d778 58
e2396f1e
JB		 59struct tasklet_completion_status {
60 int dl_opcode;
61 int tmf_state;
62 u8 tag_valid:1;
63 __be16 tag;
64};
65
66#define DECLARE_TCS(tcs) \
67 struct tasklet_completion_status tcs = { \
68 .dl_opcode = 0, \
69 .tmf_state = 0, \
70 .tag_valid = 0, \
71 .tag = 0, \
72 }
2908d778 73
2908d778
JB		 74
75static void asd_clear_nexus_tasklet_complete(struct asd_ascb *ascb,
76 struct done_list_struct *dl)
77{
e2396f1e 78 struct tasklet_completion_status *tcs = ascb->uldd_task;
cadbd4a5 79 ASD_DPRINTK("%s: here\n", __func__);
2908d778 80 if (!del_timer(&ascb->timer)) {
cadbd4a5 81 ASD_DPRINTK("%s: couldn't delete timer\n", __func__);
2908d778
JB		 82 return;
83 }
cadbd4a5 84 ASD_DPRINTK("%s: opcode: 0x%x\n", __func__, dl->opcode);
e2396f1e
JB		 85 tcs->dl_opcode = dl->opcode;
86 complete(ascb->completion);
87 asd_ascb_free(ascb);
2908d778
JB		 88}
89
90static void asd_clear_nexus_timedout(unsigned long data)
91{
e2396f1e
JB		 92 struct asd_ascb *ascb = (void *)data;
93 struct tasklet_completion_status *tcs = ascb->uldd_task;
2908d778 94
cadbd4a5 95 ASD_DPRINTK("%s: here\n", __func__);
e2396f1e
JB		 96 tcs->dl_opcode = TMF_RESP_FUNC_FAILED;
97 complete(ascb->completion);
2908d778
JB		 98}
99
100#define CLEAR_NEXUS_PRE \
e2396f1e
JB		 101 struct asd_ascb *ascb; \
102 struct scb *scb; \
103 int res; \
104 DECLARE_COMPLETION_ONSTACK(completion); \
105 DECLARE_TCS(tcs); \
106 \
cadbd4a5 107 ASD_DPRINTK("%s: PRE\n", __func__); \
2908d778
JB		 108 res = 1; \
109 ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL); \
110 if (!ascb) \
111 return -ENOMEM; \
112 \
e2396f1e
JB		 113 ascb->completion = &completion; \
114 ascb->uldd_task = &tcs; \
2908d778
JB		 115 scb = ascb->scb; \
116 scb->header.opcode = CLEAR_NEXUS
117
118#define CLEAR_NEXUS_POST \
cadbd4a5 119 ASD_DPRINTK("%s: POST\n", __func__); \
2908d778
JB		 120 res = asd_enqueue_internal(ascb, asd_clear_nexus_tasklet_complete, \
121 asd_clear_nexus_timedout); \
122 if (res) \
123 goto out_err; \
cadbd4a5 124 ASD_DPRINTK("%s: clear nexus posted, waiting...\n", __func__); \
e2396f1e
JB		 125 wait_for_completion(&completion); \
126 res = tcs.dl_opcode; \
2908d778
JB		 127 if (res == TC_NO_ERROR) \
128 res = TMF_RESP_FUNC_COMPLETE; \
e2396f1e 129 return res; \
2908d778
JB		 130out_err: \
131 asd_ascb_free(ascb); \
132 return res
133
134int asd_clear_nexus_ha(struct sas_ha_struct *sas_ha)
135{
136 struct asd_ha_struct *asd_ha = sas_ha->lldd_ha;
2908d778
JB		 137
138 CLEAR_NEXUS_PRE;
139 scb->clear_nexus.nexus = NEXUS_ADAPTER;
140 CLEAR_NEXUS_POST;
141}
142
143int asd_clear_nexus_port(struct asd_sas_port *port)
144{
145 struct asd_ha_struct *asd_ha = port->ha->lldd_ha;
2908d778
JB		 146
147 CLEAR_NEXUS_PRE;
148 scb->clear_nexus.nexus = NEXUS_PORT;
149 scb->clear_nexus.conn_mask = port->phy_mask;
150 CLEAR_NEXUS_POST;
151}
152
63edf49e
JB		 153enum clear_nexus_phase {
154 NEXUS_PHASE_PRE,
155 NEXUS_PHASE_POST,
156 NEXUS_PHASE_RESUME,
157};
158
159static int asd_clear_nexus_I_T(struct domain_device *dev,
160 enum clear_nexus_phase phase)
2908d778
JB		 161{
162 struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
2908d778
JB		 163
164 CLEAR_NEXUS_PRE;
165 scb->clear_nexus.nexus = NEXUS_I_T;
63edf49e
JB		 166 switch (phase) {
167 case NEXUS_PHASE_PRE:
168 scb->clear_nexus.flags = EXEC_Q | SUSPEND_TX;
169 break;
170 case NEXUS_PHASE_POST:
171 scb->clear_nexus.flags = SEND_Q | NOTINQ;
172 break;
173 case NEXUS_PHASE_RESUME:
174 scb->clear_nexus.flags = RESUME_TX;
175 }
2908d778
JB		 176 scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long)
177 dev->lldd_dev);
178 CLEAR_NEXUS_POST;
179}
63edf49e
JB		 180
181int asd_I_T_nexus_reset(struct domain_device *dev)
182{
183 int res, tmp_res, i;
f41a0c44 184 struct sas_phy *phy = sas_get_local_phy(dev);
63edf49e
JB		 185 /* Standard mandates link reset for ATA (type 0) and
186 * hard reset for SSP (type 1) */
aa9f8328 187 int reset_type = (dev->dev_type == SAS_SATA_DEV ||
63edf49e
JB		 188 (dev->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
189
190 asd_clear_nexus_I_T(dev, NEXUS_PHASE_PRE);
191 /* send a hard reset */
192 ASD_DPRINTK("sending %s reset to %s\n",
71610f55 193 reset_type ? "hard" : "soft", dev_name(&phy->dev));
63edf49e 194 res = sas_phy_reset(phy, reset_type);
26a2e68f 195 if (res == TMF_RESP_FUNC_COMPLETE || res == -ENODEV) {
63edf49e
JB		 196 /* wait for the maximum settle time */
197 msleep(500);
198 /* clear all outstanding commands (keep nexus suspended) */
199 asd_clear_nexus_I_T(dev, NEXUS_PHASE_POST);
200 }
201 for (i = 0 ; i < 3; i++) {
202 tmp_res = asd_clear_nexus_I_T(dev, NEXUS_PHASE_RESUME);
203 if (tmp_res == TC_RESUME)
f41a0c44 204 goto out;
63edf49e
JB		 205 msleep(500);
206 }
207
208 /* This is a bit of a problem: the sequencer is still suspended
209 * and is refusing to resume. Hope it will resume on a bigger hammer
210 * or the disk is lost */
211 dev_printk(KERN_ERR, &phy->dev,
212 "Failed to resume nexus after reset 0x%x\n", tmp_res);
213
f41a0c44
DW		 214 res = TMF_RESP_FUNC_FAILED;
215 out:
216 sas_put_local_phy(phy);
217 return res;
63edf49e 218}
2908d778
JB		 219
220static int asd_clear_nexus_I_T_L(struct domain_device *dev, u8 *lun)
221{
222 struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
2908d778
JB		 223
224 CLEAR_NEXUS_PRE;
225 scb->clear_nexus.nexus = NEXUS_I_T_L;
226 scb->clear_nexus.flags = SEND_Q | EXEC_Q | NOTINQ;
2908d778
JB		 227 memcpy(scb->clear_nexus.ssp_task.lun, lun, 8);
228 scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long)
229 dev->lldd_dev);
230 CLEAR_NEXUS_POST;
231}
232
233static int asd_clear_nexus_tag(struct sas_task *task)
234{
235 struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha;
236 struct asd_ascb *tascb = task->lldd_task;
2908d778
JB		 237
238 CLEAR_NEXUS_PRE;
239 scb->clear_nexus.nexus = NEXUS_TAG;
240 memcpy(scb->clear_nexus.ssp_task.lun, task->ssp_task.LUN, 8);
241 scb->clear_nexus.ssp_task.tag = tascb->tag;
242 if (task->dev->tproto)
243 scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long)
244 task->dev->lldd_dev);
245 CLEAR_NEXUS_POST;
246}
247
248static int asd_clear_nexus_index(struct sas_task *task)
249{
250 struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha;
251 struct asd_ascb *tascb = task->lldd_task;
2908d778
JB		 252
253 CLEAR_NEXUS_PRE;
254 scb->clear_nexus.nexus = NEXUS_TRANS_CX;
255 if (task->dev->tproto)
256 scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long)
257 task->dev->lldd_dev);
258 scb->clear_nexus.index = cpu_to_le16(tascb->tc_index);
259 CLEAR_NEXUS_POST;
260}
261
262/* ---------- TMFs ---------- */
263
264static void asd_tmf_timedout(unsigned long data)
265{
266 struct asd_ascb *ascb = (void *) data;
e2396f1e 267 struct tasklet_completion_status *tcs = ascb->uldd_task;
2908d778
JB		 268
269 ASD_DPRINTK("tmf timed out\n");
e2396f1e
JB		 270 tcs->tmf_state = TMF_RESP_FUNC_FAILED;
271 complete(ascb->completion);
2908d778
JB		 272}
273
274static int asd_get_tmf_resp_tasklet(struct asd_ascb *ascb,
275 struct done_list_struct *dl)
276{
277 struct asd_ha_struct *asd_ha = ascb->ha;
278 unsigned long flags;
279 struct tc_resp_sb_struct {
280 __le16 index_escb;
281 u8 len_lsb;
282 u8 flags;
283 } __attribute__ ((packed)) *resp_sb = (void *) dl->status_block;
284
285 int edb_id = ((resp_sb->flags & 0x70) >> 4)-1;
286 struct asd_ascb *escb;
287 struct asd_dma_tok *edb;
288 struct ssp_frame_hdr *fh;
289 struct ssp_response_iu *ru;
290 int res = TMF_RESP_FUNC_FAILED;
291
292 ASD_DPRINTK("tmf resp tasklet\n");
293
294 spin_lock_irqsave(&asd_ha->seq.tc_index_lock, flags);
295 escb = asd_tc_index_find(&asd_ha->seq,
296 (int)le16_to_cpu(resp_sb->index_escb));
297 spin_unlock_irqrestore(&asd_ha->seq.tc_index_lock, flags);
298
299 if (!escb) {
300 ASD_DPRINTK("Uh-oh! No escb for this dl?!\n");
301 return res;
302 }
303
304 edb = asd_ha->seq.edb_arr[edb_id + escb->edb_index];
305 ascb->tag = *(__be16 *)(edb->vaddr+4);
306 fh = edb->vaddr + 16;
307 ru = edb->vaddr + 16 + sizeof(*fh);
308 res = ru->status;
309 if (ru->datapres == 1) /* Response data present */
310 res = ru->resp_data[3];
311#if 0
312 ascb->tag = fh->tag;
313#endif
314 ascb->tag_valid = 1;
315
316 asd_invalidate_edb(escb, edb_id);
317 return res;
318}
319
320static void asd_tmf_tasklet_complete(struct asd_ascb *ascb,
321 struct done_list_struct *dl)
322{
e2396f1e
JB		 323 struct tasklet_completion_status *tcs;
324
2908d778
JB		 325 if (!del_timer(&ascb->timer))
326 return;
327
e2396f1e 328 tcs = ascb->uldd_task;
2908d778
JB		 329 ASD_DPRINTK("tmf tasklet complete\n");
330
e2396f1e 331 tcs->dl_opcode = dl->opcode;
2908d778 332
e2396f1e
JB		 333 if (dl->opcode == TC_SSP_RESP) {
334 tcs->tmf_state = asd_get_tmf_resp_tasklet(ascb, dl);
335 tcs->tag_valid = ascb->tag_valid;
336 tcs->tag = ascb->tag;
337 }
338
339 complete(ascb->completion);
340 asd_ascb_free(ascb);
2908d778
JB		 341}
342
81e56ded 343static int asd_clear_nexus(struct sas_task *task)
2908d778
JB		 344{
345 int res = TMF_RESP_FUNC_FAILED;
8fdcf86a 346 int leftover;
2908d778 347 struct asd_ascb *tascb = task->lldd_task;
e2396f1e 348 DECLARE_COMPLETION_ONSTACK(completion);
2908d778
JB		 349 unsigned long flags;
350
e2396f1e
JB		 351 tascb->completion = &completion;
352
2908d778
JB		 353 ASD_DPRINTK("task not done, clearing nexus\n");
354 if (tascb->tag_valid)
355 res = asd_clear_nexus_tag(task);
356 else
357 res = asd_clear_nexus_index(task);
e2396f1e 358 leftover = wait_for_completion_timeout(&completion,
8fdcf86a 359 AIC94XX_SCB_TIMEOUT);
e2396f1e 360 tascb->completion = NULL;
2908d778
JB		 361 ASD_DPRINTK("came back from clear nexus\n");
362 spin_lock_irqsave(&task->task_state_lock, flags);
8fdcf86a
DW		 363 if (leftover < 1)
364 res = TMF_RESP_FUNC_FAILED;
2908d778
JB		 365 if (task->task_state_flags & SAS_TASK_STATE_DONE)
366 res = TMF_RESP_FUNC_COMPLETE;
367 spin_unlock_irqrestore(&task->task_state_lock, flags);
368
369 return res;
370}
371
372/**
373 * asd_abort_task -- ABORT TASK TMF
374 * @task: the task to be aborted
375 *
376 * Before calling ABORT TASK the task state flags should be ORed with
377 * SAS_TASK_STATE_ABORTED (unless SAS_TASK_STATE_DONE is set) under
378 * the task_state_lock IRQ spinlock, then ABORT TASK *must* be called.
379 *
380 * Implements the ABORT TASK TMF, I_T_L_Q nexus.
381 * Returns: SAS TMF responses (see sas_task.h),
382 * -ENOMEM,
383 * -SAS_QUEUE_FULL.
384 *
385 * When ABORT TASK returns, the caller of ABORT TASK checks first the
386 * task->task_state_flags, and then the return value of ABORT TASK.
387 *
388 * If the task has task state bit SAS_TASK_STATE_DONE set, then the
389 * task was completed successfully prior to it being aborted. The
390 * caller of ABORT TASK has responsibility to call task->task_done()
391 * xor free the task, depending on their framework. The return code
392 * is TMF_RESP_FUNC_FAILED in this case.
393 *
394 * Else the SAS_TASK_STATE_DONE bit is not set,
395 * If the return code is TMF_RESP_FUNC_COMPLETE, then
396 * the task was aborted successfully. The caller of
397 * ABORT TASK has responsibility to call task->task_done()
398 * to finish the task, xor free the task depending on their
399 * framework.
400 * else
401 * the ABORT TASK returned some kind of error. The task
402 * was _not_ cancelled. Nothing can be assumed.
403 * The caller of ABORT TASK may wish to retry.
404 */
405int asd_abort_task(struct sas_task *task)
406{
407 struct asd_ascb *tascb = task->lldd_task;
408 struct asd_ha_struct *asd_ha = tascb->ha;
409 int res = 1;
410 unsigned long flags;
411 struct asd_ascb *ascb = NULL;
412 struct scb *scb;
8fdcf86a 413 int leftover;
e2396f1e
JB		 414 DECLARE_TCS(tcs);
415 DECLARE_COMPLETION_ONSTACK(completion);
416 DECLARE_COMPLETION_ONSTACK(tascb_completion);
417
418 tascb->completion = &tascb_completion;
2908d778
JB		 419
420 spin_lock_irqsave(&task->task_state_lock, flags);
421 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
422 spin_unlock_irqrestore(&task->task_state_lock, flags);
423 res = TMF_RESP_FUNC_COMPLETE;
cadbd4a5 424 ASD_DPRINTK("%s: task 0x%p done\n", __func__, task);
2908d778
JB		 425 goto out_done;
426 }
427 spin_unlock_irqrestore(&task->task_state_lock, flags);
428
429 ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL);
430 if (!ascb)
431 return -ENOMEM;
2908d778 432
e2396f1e
JB		 433 ascb->uldd_task = &tcs;
434 ascb->completion = &completion;
435 scb = ascb->scb;
90b0c418 436 scb->header.opcode = SCB_ABORT_TASK;
2908d778
JB		 437
438 switch (task->task_proto) {
5929faf3
DW		 439 case SAS_PROTOCOL_SATA:
440 case SAS_PROTOCOL_STP:
2908d778
JB		 441 scb->abort_task.proto_conn_rate = (1 << 5); /* STP */
442 break;
5929faf3 443 case SAS_PROTOCOL_SSP:
2908d778
JB		 444 scb->abort_task.proto_conn_rate = (1 << 4); /* SSP */
445 scb->abort_task.proto_conn_rate |= task->dev->linkrate;
446 break;
5929faf3 447 case SAS_PROTOCOL_SMP:
2908d778
JB		 448 break;
449 default:
450 break;
451 }
452
5929faf3 453 if (task->task_proto == SAS_PROTOCOL_SSP) {
2908d778
JB		 454 scb->abort_task.ssp_frame.frame_type = SSP_TASK;
455 memcpy(scb->abort_task.ssp_frame.hashed_dest_addr,
456 task->dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
457 memcpy(scb->abort_task.ssp_frame.hashed_src_addr,
458 task->dev->port->ha->hashed_sas_addr,
459 HASHED_SAS_ADDR_SIZE);
460 scb->abort_task.ssp_frame.tptt = cpu_to_be16(0xFFFF);
461
462 memcpy(scb->abort_task.ssp_task.lun, task->ssp_task.LUN, 8);
463 scb->abort_task.ssp_task.tmf = TMF_ABORT_TASK;
464 scb->abort_task.ssp_task.tag = cpu_to_be16(0xFFFF);
465 }
466
467 scb->abort_task.sister_scb = cpu_to_le16(0xFFFF);
468 scb->abort_task.conn_handle = cpu_to_le16(
469 (u16)(unsigned long)task->dev->lldd_dev);
470 scb->abort_task.retry_count = 1;
471 scb->abort_task.index = cpu_to_le16((u16)tascb->tc_index);
472 scb->abort_task.itnl_to = cpu_to_le16(ITNL_TIMEOUT_CONST);
473
474 res = asd_enqueue_internal(ascb, asd_tmf_tasklet_complete,
475 asd_tmf_timedout);
476 if (res)
e2396f1e
JB		 477 goto out_free;
478 wait_for_completion(&completion);
2908d778
JB		 479 ASD_DPRINTK("tmf came back\n");
480
e2396f1e
JB		 481 tascb->tag = tcs.tag;
482 tascb->tag_valid = tcs.tag_valid;
2908d778
JB		 483
484 spin_lock_irqsave(&task->task_state_lock, flags);
485 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
486 spin_unlock_irqrestore(&task->task_state_lock, flags);
487 res = TMF_RESP_FUNC_COMPLETE;
cadbd4a5 488 ASD_DPRINTK("%s: task 0x%p done\n", __func__, task);
2908d778
JB		 489 goto out_done;
490 }
491 spin_unlock_irqrestore(&task->task_state_lock, flags);
492
e2396f1e
JB		 493 if (tcs.dl_opcode == TC_SSP_RESP) {
494 /* The task to be aborted has been sent to the device.
495 * We got a Response IU for the ABORT TASK TMF. */
496 if (tcs.tmf_state == TMF_RESP_FUNC_COMPLETE)
497 res = asd_clear_nexus(task);
498 else
499 res = tcs.tmf_state;
500 } else if (tcs.dl_opcode == TC_NO_ERROR &&
501 tcs.tmf_state == TMF_RESP_FUNC_FAILED) {
502 /* timeout */
2908d778 503 res = TMF_RESP_FUNC_FAILED;
e2396f1e
JB		 504 } else {
505 /* In the following we assume that the managing layer
506 * will _never_ make a mistake, when issuing ABORT
507 * TASK.
508 */
509 switch (tcs.dl_opcode) {
510 default:
511 res = asd_clear_nexus(task);
512 /* fallthrough */
513 case TC_NO_ERROR:
514 break;
515 /* The task hasn't been sent to the device xor
516 * we never got a (sane) Response IU for the
517 * ABORT TASK TMF.
518 */
519 case TF_NAK_RECV:
520 res = TMF_RESP_INVALID_FRAME;
521 break;
522 case TF_TMF_TASK_DONE: /* done but not reported yet */
8fdcf86a 523 res = TMF_RESP_FUNC_FAILED;
e2396f1e
JB		 524 leftover =
525 wait_for_completion_timeout(&tascb_completion,
526 AIC94XX_SCB_TIMEOUT);
527 spin_lock_irqsave(&task->task_state_lock, flags);
528 if (leftover < 1)
529 res = TMF_RESP_FUNC_FAILED;
530 if (task->task_state_flags & SAS_TASK_STATE_DONE)
531 res = TMF_RESP_FUNC_COMPLETE;
532 spin_unlock_irqrestore(&task->task_state_lock, flags);
533 break;
534 case TF_TMF_NO_TAG:
535 case TF_TMF_TAG_FREE: /* the tag is in the free list */
536 case TF_TMF_NO_CONN_HANDLE: /* no such device */
2908d778 537 res = TMF_RESP_FUNC_COMPLETE;
e2396f1e
JB		 538 break;
539 case TF_TMF_NO_CTX: /* not in seq, or proto != SSP */
540 res = TMF_RESP_FUNC_ESUPP;
541 break;
542 }
2908d778 543 }
e2396f1e
JB		 544 out_done:
545 tascb->completion = NULL;
2908d778
JB		 546 if (res == TMF_RESP_FUNC_COMPLETE) {
547 task->lldd_task = NULL;
548 mb();
549 asd_ascb_free(tascb);
550 }
e2396f1e
JB		 551 ASD_DPRINTK("task 0x%p aborted, res: 0x%x\n", task, res);
552 return res;
553
554 out_free:
2908d778
JB		 555 asd_ascb_free(ascb);
556 ASD_DPRINTK("task 0x%p aborted, res: 0x%x\n", task, res);
557 return res;
558}
559
560/**
561 * asd_initiate_ssp_tmf -- send a TMF to an I_T_L or I_T_L_Q nexus
562 * @dev: pointer to struct domain_device of interest
563 * @lun: pointer to u8[8] which is the LUN
564 * @tmf: the TMF to be performed (see sas_task.h or the SAS spec)
565 * @index: the transaction context of the task to be queried if QT TMF
566 *
567 * This function is used to send ABORT TASK SET, CLEAR ACA,
568 * CLEAR TASK SET, LU RESET and QUERY TASK TMFs.
569 *
570 * No SCBs should be queued to the I_T_L nexus when this SCB is
571 * pending.
572 *
573 * Returns: TMF response code (see sas_task.h or the SAS spec)
574 */
575static int asd_initiate_ssp_tmf(struct domain_device *dev, u8 *lun,
576 int tmf, int index)
577{
578 struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
579 struct asd_ascb *ascb;
580 int res = 1;
581 struct scb *scb;
e2396f1e
JB		 582 DECLARE_COMPLETION_ONSTACK(completion);
583 DECLARE_TCS(tcs);
2908d778 584
5929faf3 585 if (!(dev->tproto & SAS_PROTOCOL_SSP))
2908d778
JB		 586 return TMF_RESP_FUNC_ESUPP;
587
588 ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL);
589 if (!ascb)
590 return -ENOMEM;
e2396f1e
JB		 591
592 ascb->completion = &completion;
593 ascb->uldd_task = &tcs;
2908d778
JB		 594 scb = ascb->scb;
595
596 if (tmf == TMF_QUERY_TASK)
597 scb->header.opcode = QUERY_SSP_TASK;
598 else
599 scb->header.opcode = INITIATE_SSP_TMF;
600
601 scb->ssp_tmf.proto_conn_rate = (1 << 4); /* SSP */
602 scb->ssp_tmf.proto_conn_rate |= dev->linkrate;
603 /* SSP frame header */
604 scb->ssp_tmf.ssp_frame.frame_type = SSP_TASK;
605 memcpy(scb->ssp_tmf.ssp_frame.hashed_dest_addr,
606 dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
607 memcpy(scb->ssp_tmf.ssp_frame.hashed_src_addr,
608 dev->port->ha->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
609 scb->ssp_tmf.ssp_frame.tptt = cpu_to_be16(0xFFFF);
610 /* SSP Task IU */
611 memcpy(scb->ssp_tmf.ssp_task.lun, lun, 8);
612 scb->ssp_tmf.ssp_task.tmf = tmf;
613
614 scb->ssp_tmf.sister_scb = cpu_to_le16(0xFFFF);
615 scb->ssp_tmf.conn_handle= cpu_to_le16((u16)(unsigned long)
616 dev->lldd_dev);
617 scb->ssp_tmf.retry_count = 1;
618 scb->ssp_tmf.itnl_to = cpu_to_le16(ITNL_TIMEOUT_CONST);
619 if (tmf == TMF_QUERY_TASK)
620 scb->ssp_tmf.index = cpu_to_le16(index);
621
622 res = asd_enqueue_internal(ascb, asd_tmf_tasklet_complete,
623 asd_tmf_timedout);
624 if (res)
625 goto out_err;
e2396f1e 626 wait_for_completion(&completion);
2908d778 627
e2396f1e
JB		 628 switch (tcs.dl_opcode) {
629 case TC_NO_ERROR:
2908d778
JB		 630 res = TMF_RESP_FUNC_COMPLETE;
631 break;
e2396f1e 632 case TF_NAK_RECV:
2908d778
JB		 633 res = TMF_RESP_INVALID_FRAME;
634 break;
e2396f1e 635 case TF_TMF_TASK_DONE:
2908d778
JB		 636 res = TMF_RESP_FUNC_FAILED;
637 break;
e2396f1e
JB		 638 case TF_TMF_NO_TAG:
639 case TF_TMF_TAG_FREE: /* the tag is in the free list */
640 case TF_TMF_NO_CONN_HANDLE: /* no such device */
2908d778
JB		 641 res = TMF_RESP_FUNC_COMPLETE;
642 break;
e2396f1e 643 case TF_TMF_NO_CTX: /* not in seq, or proto != SSP */
2908d778
JB		 644 res = TMF_RESP_FUNC_ESUPP;
645 break;
646 default:
058e2c47 647 /* Allow TMF response codes to propagate upwards */
e2396f1e 648 res = tcs.dl_opcode;
2908d778
JB		 649 break;
650 }
e2396f1e 651 return res;
2908d778
JB		 652out_err:
653 asd_ascb_free(ascb);
654 return res;
655}
656
657int asd_abort_task_set(struct domain_device *dev, u8 *lun)
658{
659 int res = asd_initiate_ssp_tmf(dev, lun, TMF_ABORT_TASK_SET, 0);
660
661 if (res == TMF_RESP_FUNC_COMPLETE)
662 asd_clear_nexus_I_T_L(dev, lun);
663 return res;
664}
665
666int asd_clear_aca(struct domain_device *dev, u8 *lun)
667{
668 int res = asd_initiate_ssp_tmf(dev, lun, TMF_CLEAR_ACA, 0);
669
670 if (res == TMF_RESP_FUNC_COMPLETE)
671 asd_clear_nexus_I_T_L(dev, lun);
672 return res;
673}
674
675int asd_clear_task_set(struct domain_device *dev, u8 *lun)
676{
677 int res = asd_initiate_ssp_tmf(dev, lun, TMF_CLEAR_TASK_SET, 0);
678
679 if (res == TMF_RESP_FUNC_COMPLETE)
680 asd_clear_nexus_I_T_L(dev, lun);
681 return res;
682}
683
684int asd_lu_reset(struct domain_device *dev, u8 *lun)
685{
686 int res = asd_initiate_ssp_tmf(dev, lun, TMF_LU_RESET, 0);
687
688 if (res == TMF_RESP_FUNC_COMPLETE)
689 asd_clear_nexus_I_T_L(dev, lun);
690 return res;
691}
692
693/**
694 * asd_query_task -- send a QUERY TASK TMF to an I_T_L_Q nexus
695 * task: pointer to sas_task struct of interest
696 *
697 * Returns: TMF_RESP_FUNC_COMPLETE if the task is not in the task set,
698 * or TMF_RESP_FUNC_SUCC if the task is in the task set.
699 *
700 * Normally the management layer sets the task to aborted state,
701 * and then calls query task and then abort task.
702 */
703int asd_query_task(struct sas_task *task)
704{
705 struct asd_ascb *ascb = task->lldd_task;
706 int index;
707
708 if (ascb) {
709 index = ascb->tc_index;
710 return asd_initiate_ssp_tmf(task->dev, task->ssp_task.LUN,
711 TMF_QUERY_TASK, index);
712 }
713 return TMF_RESP_FUNC_COMPLETE;
714}
Linux kernel - Deliverables
This page took 0.87968 seconds and 5 git commands to generate.