1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Aic94xx SAS/SATA Tasks
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 "aic94xx.h"
11 #include "aic94xx_sas.h"
12 #include "aic94xx_hwi.h"
13
14 static void asd_unbuild_ata_ascb(struct asd_ascb *a);
15 static void asd_unbuild_smp_ascb(struct asd_ascb *a);
16 static void asd_unbuild_ssp_ascb(struct asd_ascb *a);
17
asd_can_dequeue(struct asd_ha_struct * asd_ha,int num)18 static void asd_can_dequeue(struct asd_ha_struct *asd_ha, int num)
19 {
20 unsigned long flags;
21
22 spin_lock_irqsave(&asd_ha->seq.pend_q_lock, flags);
23 asd_ha->seq.can_queue += num;
24 spin_unlock_irqrestore(&asd_ha->seq.pend_q_lock, flags);
25 }
26
27 /* DMA_... to our direction translation.
28 */
29 static const u8 data_dir_flags[] = {
30 [DMA_BIDIRECTIONAL] = DATA_DIR_BYRECIPIENT, /* UNSPECIFIED */
31 [DMA_TO_DEVICE] = DATA_DIR_OUT, /* OUTBOUND */
32 [DMA_FROM_DEVICE] = DATA_DIR_IN, /* INBOUND */
33 [DMA_NONE] = DATA_DIR_NONE, /* NO TRANSFER */
34 };
35
asd_map_scatterlist(struct sas_task * task,struct sg_el * sg_arr,gfp_t gfp_flags)36 static int asd_map_scatterlist(struct sas_task *task,
37 struct sg_el *sg_arr,
38 gfp_t gfp_flags)
39 {
40 struct asd_ascb *ascb = task->lldd_task;
41 struct asd_ha_struct *asd_ha = ascb->ha;
42 struct scatterlist *sc;
43 int num_sg, res;
44
45 if (task->data_dir == DMA_NONE)
46 return 0;
47
48 if (task->num_scatter == 0) {
49 void *p = task->scatter;
50 dma_addr_t dma = dma_map_single(&asd_ha->pcidev->dev, p,
51 task->total_xfer_len,
52 task->data_dir);
53 if (dma_mapping_error(&asd_ha->pcidev->dev, dma))
54 return -ENOMEM;
55
56 sg_arr[0].bus_addr = cpu_to_le64((u64)dma);
57 sg_arr[0].size = cpu_to_le32(task->total_xfer_len);
58 sg_arr[0].flags |= ASD_SG_EL_LIST_EOL;
59 return 0;
60 }
61
62 /* STP tasks come from libata which has already mapped
63 * the SG list */
64 if (sas_protocol_ata(task->task_proto))
65 num_sg = task->num_scatter;
66 else
67 num_sg = dma_map_sg(&asd_ha->pcidev->dev, task->scatter,
68 task->num_scatter, task->data_dir);
69 if (num_sg == 0)
70 return -ENOMEM;
71
72 if (num_sg > 3) {
73 int i;
74
75 ascb->sg_arr = asd_alloc_coherent(asd_ha,
76 num_sg*sizeof(struct sg_el),
77 gfp_flags);
78 if (!ascb->sg_arr) {
79 res = -ENOMEM;
80 goto err_unmap;
81 }
82 for_each_sg(task->scatter, sc, num_sg, i) {
83 struct sg_el *sg =
84 &((struct sg_el *)ascb->sg_arr->vaddr)[i];
85 sg->bus_addr = cpu_to_le64((u64)sg_dma_address(sc));
86 sg->size = cpu_to_le32((u32)sg_dma_len(sc));
87 if (i == num_sg-1)
88 sg->flags |= ASD_SG_EL_LIST_EOL;
89 }
90
91 for_each_sg(task->scatter, sc, 2, i) {
92 sg_arr[i].bus_addr =
93 cpu_to_le64((u64)sg_dma_address(sc));
94 sg_arr[i].size = cpu_to_le32((u32)sg_dma_len(sc));
95 }
96 sg_arr[1].next_sg_offs = 2 * sizeof(*sg_arr);
97 sg_arr[1].flags |= ASD_SG_EL_LIST_EOS;
98
99 memset(&sg_arr[2], 0, sizeof(*sg_arr));
100 sg_arr[2].bus_addr=cpu_to_le64((u64)ascb->sg_arr->dma_handle);
101 } else {
102 int i;
103 for_each_sg(task->scatter, sc, num_sg, i) {
104 sg_arr[i].bus_addr =
105 cpu_to_le64((u64)sg_dma_address(sc));
106 sg_arr[i].size = cpu_to_le32((u32)sg_dma_len(sc));
107 }
108 sg_arr[i-1].flags |= ASD_SG_EL_LIST_EOL;
109 }
110
111 return 0;
112 err_unmap:
113 if (sas_protocol_ata(task->task_proto))
114 dma_unmap_sg(&asd_ha->pcidev->dev, task->scatter,
115 task->num_scatter, task->data_dir);
116 return res;
117 }
118
asd_unmap_scatterlist(struct asd_ascb * ascb)119 static void asd_unmap_scatterlist(struct asd_ascb *ascb)
120 {
121 struct asd_ha_struct *asd_ha = ascb->ha;
122 struct sas_task *task = ascb->uldd_task;
123
124 if (task->data_dir == DMA_NONE)
125 return;
126
127 if (task->num_scatter == 0) {
128 dma_addr_t dma = (dma_addr_t)
129 le64_to_cpu(ascb->scb->ssp_task.sg_element[0].bus_addr);
130 dma_unmap_single(&ascb->ha->pcidev->dev, dma,
131 task->total_xfer_len, task->data_dir);
132 return;
133 }
134
135 asd_free_coherent(asd_ha, ascb->sg_arr);
136 if (task->task_proto != SAS_PROTOCOL_STP)
137 dma_unmap_sg(&asd_ha->pcidev->dev, task->scatter,
138 task->num_scatter, task->data_dir);
139 }
140
141 /* ---------- Task complete tasklet ---------- */
142
asd_get_response_tasklet(struct asd_ascb * ascb,struct done_list_struct * dl)143 static void asd_get_response_tasklet(struct asd_ascb *ascb,
144 struct done_list_struct *dl)
145 {
146 struct asd_ha_struct *asd_ha = ascb->ha;
147 struct sas_task *task = ascb->uldd_task;
148 struct task_status_struct *ts = &task->task_status;
149 unsigned long flags;
150 struct tc_resp_sb_struct {
151 __le16 index_escb;
152 u8 len_lsb;
153 u8 flags;
154 } __attribute__ ((packed)) *resp_sb = (void *) dl->status_block;
155
156 /* int size = ((resp_sb->flags & 7) << 8) | resp_sb->len_lsb; */
157 int edb_id = ((resp_sb->flags & 0x70) >> 4)-1;
158 struct asd_ascb *escb;
159 struct asd_dma_tok *edb;
160 void *r;
161
162 spin_lock_irqsave(&asd_ha->seq.tc_index_lock, flags);
163 escb = asd_tc_index_find(&asd_ha->seq,
164 (int)le16_to_cpu(resp_sb->index_escb));
165 spin_unlock_irqrestore(&asd_ha->seq.tc_index_lock, flags);
166
167 if (!escb) {
168 ASD_DPRINTK("Uh-oh! No escb for this dl?!\n");
169 return;
170 }
171
172 ts->buf_valid_size = 0;
173 edb = asd_ha->seq.edb_arr[edb_id + escb->edb_index];
174 r = edb->vaddr;
175 if (task->task_proto == SAS_PROTOCOL_SSP) {
176 struct ssp_response_iu *iu =
177 r + 16 + sizeof(struct ssp_frame_hdr);
178
179 ts->residual = le32_to_cpu(*(__le32 *)r);
180
181 sas_ssp_task_response(&asd_ha->pcidev->dev, task, iu);
182 } else {
183 struct ata_task_resp *resp = (void *) &ts->buf[0];
184
185 ts->residual = le32_to_cpu(*(__le32 *)r);
186
187 if (SAS_STATUS_BUF_SIZE >= sizeof(*resp)) {
188 resp->frame_len = le16_to_cpu(*(__le16 *)(r+6));
189 memcpy(&resp->ending_fis[0], r+16, ATA_RESP_FIS_SIZE);
190 ts->buf_valid_size = sizeof(*resp);
191 }
192 }
193
194 asd_invalidate_edb(escb, edb_id);
195 }
196
asd_task_tasklet_complete(struct asd_ascb * ascb,struct done_list_struct * dl)197 static void asd_task_tasklet_complete(struct asd_ascb *ascb,
198 struct done_list_struct *dl)
199 {
200 struct sas_task *task = ascb->uldd_task;
201 struct task_status_struct *ts = &task->task_status;
202 unsigned long flags;
203 u8 opcode = dl->opcode;
204
205 asd_can_dequeue(ascb->ha, 1);
206
207 Again:
208 switch (opcode) {
209 case TC_NO_ERROR:
210 ts->resp = SAS_TASK_COMPLETE;
211 ts->stat = SAS_SAM_STAT_GOOD;
212 break;
213 case TC_UNDERRUN:
214 ts->resp = SAS_TASK_COMPLETE;
215 ts->stat = SAS_DATA_UNDERRUN;
216 ts->residual = le32_to_cpu(*(__le32 *)dl->status_block);
217 break;
218 case TC_OVERRUN:
219 ts->resp = SAS_TASK_COMPLETE;
220 ts->stat = SAS_DATA_OVERRUN;
221 ts->residual = 0;
222 break;
223 case TC_SSP_RESP:
224 case TC_ATA_RESP:
225 ts->resp = SAS_TASK_COMPLETE;
226 ts->stat = SAS_PROTO_RESPONSE;
227 asd_get_response_tasklet(ascb, dl);
228 break;
229 case TF_OPEN_REJECT:
230 ts->resp = SAS_TASK_UNDELIVERED;
231 ts->stat = SAS_OPEN_REJECT;
232 if (dl->status_block[1] & 2)
233 ts->open_rej_reason = 1 + dl->status_block[2];
234 else if (dl->status_block[1] & 1)
235 ts->open_rej_reason = (dl->status_block[2] >> 4)+10;
236 else
237 ts->open_rej_reason = SAS_OREJ_UNKNOWN;
238 break;
239 case TF_OPEN_TO:
240 ts->resp = SAS_TASK_UNDELIVERED;
241 ts->stat = SAS_OPEN_TO;
242 break;
243 case TF_PHY_DOWN:
244 case TU_PHY_DOWN:
245 ts->resp = SAS_TASK_UNDELIVERED;
246 ts->stat = SAS_PHY_DOWN;
247 break;
248 case TI_PHY_DOWN:
249 ts->resp = SAS_TASK_COMPLETE;
250 ts->stat = SAS_PHY_DOWN;
251 break;
252 case TI_BREAK:
253 case TI_PROTO_ERR:
254 case TI_NAK:
255 case TI_ACK_NAK_TO:
256 case TF_SMP_XMIT_RCV_ERR:
257 case TC_ATA_R_ERR_RECV:
258 ts->resp = SAS_TASK_COMPLETE;
259 ts->stat = SAS_INTERRUPTED;
260 break;
261 case TF_BREAK:
262 case TU_BREAK:
263 case TU_ACK_NAK_TO:
264 case TF_SMPRSP_TO:
265 ts->resp = SAS_TASK_UNDELIVERED;
266 ts->stat = SAS_DEV_NO_RESPONSE;
267 break;
268 case TF_NAK_RECV:
269 ts->resp = SAS_TASK_COMPLETE;
270 ts->stat = SAS_NAK_R_ERR;
271 break;
272 case TA_I_T_NEXUS_LOSS:
273 opcode = dl->status_block[0];
274 goto Again;
275 case TF_INV_CONN_HANDLE:
276 ts->resp = SAS_TASK_UNDELIVERED;
277 ts->stat = SAS_DEVICE_UNKNOWN;
278 break;
279 case TF_REQUESTED_N_PENDING:
280 ts->resp = SAS_TASK_UNDELIVERED;
281 ts->stat = SAS_PENDING;
282 break;
283 case TC_TASK_CLEARED:
284 case TA_ON_REQ:
285 ts->resp = SAS_TASK_COMPLETE;
286 ts->stat = SAS_ABORTED_TASK;
287 break;
288
289 case TF_NO_SMP_CONN:
290 case TF_TMF_NO_CTX:
291 case TF_TMF_NO_TAG:
292 case TF_TMF_TAG_FREE:
293 case TF_TMF_TASK_DONE:
294 case TF_TMF_NO_CONN_HANDLE:
295 case TF_IRTT_TO:
296 case TF_IU_SHORT:
297 case TF_DATA_OFFS_ERR:
298 ts->resp = SAS_TASK_UNDELIVERED;
299 ts->stat = SAS_DEV_NO_RESPONSE;
300 break;
301
302 case TC_LINK_ADM_RESP:
303 case TC_CONTROL_PHY:
304 case TC_RESUME:
305 case TC_PARTIAL_SG_LIST:
306 default:
307 ASD_DPRINTK("%s: dl opcode: 0x%x?\n", __func__, opcode);
308 break;
309 }
310
311 switch (task->task_proto) {
312 case SAS_PROTOCOL_SATA:
313 case SAS_PROTOCOL_STP:
314 asd_unbuild_ata_ascb(ascb);
315 break;
316 case SAS_PROTOCOL_SMP:
317 asd_unbuild_smp_ascb(ascb);
318 break;
319 case SAS_PROTOCOL_SSP:
320 asd_unbuild_ssp_ascb(ascb);
321 break;
322 default:
323 break;
324 }
325
326 spin_lock_irqsave(&task->task_state_lock, flags);
327 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
328 task->task_state_flags |= SAS_TASK_STATE_DONE;
329 if (unlikely((task->task_state_flags & SAS_TASK_STATE_ABORTED))) {
330 struct completion *completion = ascb->completion;
331 spin_unlock_irqrestore(&task->task_state_lock, flags);
332 ASD_DPRINTK("task 0x%p done with opcode 0x%x resp 0x%x "
333 "stat 0x%x but aborted by upper layer!\n",
334 task, opcode, ts->resp, ts->stat);
335 if (completion)
336 complete(completion);
337 } else {
338 spin_unlock_irqrestore(&task->task_state_lock, flags);
339 task->lldd_task = NULL;
340 asd_ascb_free(ascb);
341 mb();
342 task->task_done(task);
343 }
344 }
345
346 /* ---------- ATA ---------- */
347
asd_build_ata_ascb(struct asd_ascb * ascb,struct sas_task * task,gfp_t gfp_flags)348 static int asd_build_ata_ascb(struct asd_ascb *ascb, struct sas_task *task,
349 gfp_t gfp_flags)
350 {
351 struct domain_device *dev = task->dev;
352 struct scb *scb;
353 u8 flags;
354 int res = 0;
355
356 scb = ascb->scb;
357
358 if (unlikely(task->ata_task.device_control_reg_update))
359 scb->header.opcode = CONTROL_ATA_DEV;
360 else if (dev->sata_dev.class == ATA_DEV_ATAPI)
361 scb->header.opcode = INITIATE_ATAPI_TASK;
362 else
363 scb->header.opcode = INITIATE_ATA_TASK;
364
365 scb->ata_task.proto_conn_rate = (1 << 5); /* STP */
366 if (dev->port->oob_mode == SAS_OOB_MODE)
367 scb->ata_task.proto_conn_rate |= dev->linkrate;
368
369 scb->ata_task.total_xfer_len = cpu_to_le32(task->total_xfer_len);
370 scb->ata_task.fis = task->ata_task.fis;
371 if (likely(!task->ata_task.device_control_reg_update))
372 scb->ata_task.fis.flags |= 0x80; /* C=1: update ATA cmd reg */
373 scb->ata_task.fis.flags &= 0xF0; /* PM_PORT field shall be 0 */
374 if (dev->sata_dev.class == ATA_DEV_ATAPI)
375 memcpy(scb->ata_task.atapi_packet, task->ata_task.atapi_packet,
376 16);
377 scb->ata_task.sister_scb = cpu_to_le16(0xFFFF);
378 scb->ata_task.conn_handle = cpu_to_le16(
379 (u16)(unsigned long)dev->lldd_dev);
380
381 if (likely(!task->ata_task.device_control_reg_update)) {
382 flags = 0;
383 if (task->ata_task.dma_xfer)
384 flags |= DATA_XFER_MODE_DMA;
385 if (task->ata_task.use_ncq &&
386 dev->sata_dev.class != ATA_DEV_ATAPI)
387 flags |= ATA_Q_TYPE_NCQ;
388 flags |= data_dir_flags[task->data_dir];
389 scb->ata_task.ata_flags = flags;
390
391 scb->ata_task.retry_count = 0;
392
393 scb->ata_task.flags = 0;
394 }
395 ascb->tasklet_complete = asd_task_tasklet_complete;
396
397 if (likely(!task->ata_task.device_control_reg_update))
398 res = asd_map_scatterlist(task, scb->ata_task.sg_element,
399 gfp_flags);
400
401 return res;
402 }
403
asd_unbuild_ata_ascb(struct asd_ascb * a)404 static void asd_unbuild_ata_ascb(struct asd_ascb *a)
405 {
406 asd_unmap_scatterlist(a);
407 }
408
409 /* ---------- SMP ---------- */
410
asd_build_smp_ascb(struct asd_ascb * ascb,struct sas_task * task,gfp_t gfp_flags)411 static int asd_build_smp_ascb(struct asd_ascb *ascb, struct sas_task *task,
412 gfp_t gfp_flags)
413 {
414 struct asd_ha_struct *asd_ha = ascb->ha;
415 struct domain_device *dev = task->dev;
416 struct scb *scb;
417
418 dma_map_sg(&asd_ha->pcidev->dev, &task->smp_task.smp_req, 1,
419 DMA_TO_DEVICE);
420 dma_map_sg(&asd_ha->pcidev->dev, &task->smp_task.smp_resp, 1,
421 DMA_FROM_DEVICE);
422
423 scb = ascb->scb;
424
425 scb->header.opcode = INITIATE_SMP_TASK;
426
427 scb->smp_task.proto_conn_rate = dev->linkrate;
428
429 scb->smp_task.smp_req.bus_addr =
430 cpu_to_le64((u64)sg_dma_address(&task->smp_task.smp_req));
431 scb->smp_task.smp_req.size =
432 cpu_to_le32((u32)sg_dma_len(&task->smp_task.smp_req)-4);
433
434 scb->smp_task.smp_resp.bus_addr =
435 cpu_to_le64((u64)sg_dma_address(&task->smp_task.smp_resp));
436 scb->smp_task.smp_resp.size =
437 cpu_to_le32((u32)sg_dma_len(&task->smp_task.smp_resp)-4);
438
439 scb->smp_task.sister_scb = cpu_to_le16(0xFFFF);
440 scb->smp_task.conn_handle = cpu_to_le16((u16)
441 (unsigned long)dev->lldd_dev);
442
443 ascb->tasklet_complete = asd_task_tasklet_complete;
444
445 return 0;
446 }
447
asd_unbuild_smp_ascb(struct asd_ascb * a)448 static void asd_unbuild_smp_ascb(struct asd_ascb *a)
449 {
450 struct sas_task *task = a->uldd_task;
451
452 BUG_ON(!task);
453 dma_unmap_sg(&a->ha->pcidev->dev, &task->smp_task.smp_req, 1,
454 DMA_TO_DEVICE);
455 dma_unmap_sg(&a->ha->pcidev->dev, &task->smp_task.smp_resp, 1,
456 DMA_FROM_DEVICE);
457 }
458
459 /* ---------- SSP ---------- */
460
asd_build_ssp_ascb(struct asd_ascb * ascb,struct sas_task * task,gfp_t gfp_flags)461 static int asd_build_ssp_ascb(struct asd_ascb *ascb, struct sas_task *task,
462 gfp_t gfp_flags)
463 {
464 struct domain_device *dev = task->dev;
465 struct scb *scb;
466 int res = 0;
467
468 scb = ascb->scb;
469
470 scb->header.opcode = INITIATE_SSP_TASK;
471
472 scb->ssp_task.proto_conn_rate = (1 << 4); /* SSP */
473 scb->ssp_task.proto_conn_rate |= dev->linkrate;
474 scb->ssp_task.total_xfer_len = cpu_to_le32(task->total_xfer_len);
475 scb->ssp_task.ssp_frame.frame_type = SSP_DATA;
476 memcpy(scb->ssp_task.ssp_frame.hashed_dest_addr, dev->hashed_sas_addr,
477 HASHED_SAS_ADDR_SIZE);
478 memcpy(scb->ssp_task.ssp_frame.hashed_src_addr,
479 dev->port->ha->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
480 scb->ssp_task.ssp_frame.tptt = cpu_to_be16(0xFFFF);
481
482 memcpy(scb->ssp_task.ssp_cmd.lun, task->ssp_task.LUN, 8);
483 scb->ssp_task.ssp_cmd.efb_prio_attr |= (task->ssp_task.task_attr & 7);
484 memcpy(scb->ssp_task.ssp_cmd.cdb, task->ssp_task.cmd->cmnd,
485 task->ssp_task.cmd->cmd_len);
486
487 scb->ssp_task.sister_scb = cpu_to_le16(0xFFFF);
488 scb->ssp_task.conn_handle = cpu_to_le16(
489 (u16)(unsigned long)dev->lldd_dev);
490 scb->ssp_task.data_dir = data_dir_flags[task->data_dir];
491 scb->ssp_task.retry_count = scb->ssp_task.retry_count;
492
493 ascb->tasklet_complete = asd_task_tasklet_complete;
494
495 res = asd_map_scatterlist(task, scb->ssp_task.sg_element, gfp_flags);
496
497 return res;
498 }
499
asd_unbuild_ssp_ascb(struct asd_ascb * a)500 static void asd_unbuild_ssp_ascb(struct asd_ascb *a)
501 {
502 asd_unmap_scatterlist(a);
503 }
504
505 /* ---------- Execute Task ---------- */
506
asd_can_queue(struct asd_ha_struct * asd_ha,int num)507 static int asd_can_queue(struct asd_ha_struct *asd_ha, int num)
508 {
509 int res = 0;
510 unsigned long flags;
511
512 spin_lock_irqsave(&asd_ha->seq.pend_q_lock, flags);
513 if ((asd_ha->seq.can_queue - num) < 0)
514 res = -SAS_QUEUE_FULL;
515 else
516 asd_ha->seq.can_queue -= num;
517 spin_unlock_irqrestore(&asd_ha->seq.pend_q_lock, flags);
518
519 return res;
520 }
521
asd_execute_task(struct sas_task * task,gfp_t gfp_flags)522 int asd_execute_task(struct sas_task *task, gfp_t gfp_flags)
523 {
524 int res = 0;
525 LIST_HEAD(alist);
526 struct sas_task *t = task;
527 struct asd_ascb *ascb = NULL, *a;
528 struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha;
529
530 res = asd_can_queue(asd_ha, 1);
531 if (res)
532 return res;
533
534 res = 1;
535 ascb = asd_ascb_alloc_list(asd_ha, &res, gfp_flags);
536 if (res) {
537 res = -ENOMEM;
538 goto out_err;
539 }
540
541 __list_add(&alist, ascb->list.prev, &ascb->list);
542 list_for_each_entry(a, &alist, list) {
543 a->uldd_task = t;
544 t->lldd_task = a;
545 break;
546 }
547 list_for_each_entry(a, &alist, list) {
548 t = a->uldd_task;
549 a->uldd_timer = 1;
550 if (t->task_proto & SAS_PROTOCOL_STP)
551 t->task_proto = SAS_PROTOCOL_STP;
552 switch (t->task_proto) {
553 case SAS_PROTOCOL_SATA:
554 case SAS_PROTOCOL_STP:
555 res = asd_build_ata_ascb(a, t, gfp_flags);
556 break;
557 case SAS_PROTOCOL_SMP:
558 res = asd_build_smp_ascb(a, t, gfp_flags);
559 break;
560 case SAS_PROTOCOL_SSP:
561 res = asd_build_ssp_ascb(a, t, gfp_flags);
562 break;
563 default:
564 asd_printk("unknown sas_task proto: 0x%x\n",
565 t->task_proto);
566 res = -ENOMEM;
567 break;
568 }
569 if (res)
570 goto out_err_unmap;
571 }
572 list_del_init(&alist);
573
574 res = asd_post_ascb_list(asd_ha, ascb, 1);
575 if (unlikely(res)) {
576 a = NULL;
577 __list_add(&alist, ascb->list.prev, &ascb->list);
578 goto out_err_unmap;
579 }
580
581 return 0;
582 out_err_unmap:
583 {
584 struct asd_ascb *b = a;
585 list_for_each_entry(a, &alist, list) {
586 if (a == b)
587 break;
588 t = a->uldd_task;
589 switch (t->task_proto) {
590 case SAS_PROTOCOL_SATA:
591 case SAS_PROTOCOL_STP:
592 asd_unbuild_ata_ascb(a);
593 break;
594 case SAS_PROTOCOL_SMP:
595 asd_unbuild_smp_ascb(a);
596 break;
597 case SAS_PROTOCOL_SSP:
598 asd_unbuild_ssp_ascb(a);
599 break;
600 default:
601 break;
602 }
603 t->lldd_task = NULL;
604 }
605 }
606 list_del_init(&alist);
607 out_err:
608 if (ascb)
609 asd_ascb_free_list(ascb);
610 asd_can_dequeue(asd_ha, 1);
611 return res;
612 }
613