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_AT_INITIATOR;
329 task->task_state_flags |= SAS_TASK_STATE_DONE;
330 if (unlikely((task->task_state_flags & SAS_TASK_STATE_ABORTED))) {
331 struct completion *completion = ascb->completion;
332 spin_unlock_irqrestore(&task->task_state_lock, flags);
333 ASD_DPRINTK("task 0x%p done with opcode 0x%x resp 0x%x "
334 "stat 0x%x but aborted by upper layer!\n",
335 task, opcode, ts->resp, ts->stat);
336 if (completion)
337 complete(completion);
338 } else {
339 spin_unlock_irqrestore(&task->task_state_lock, flags);
340 task->lldd_task = NULL;
341 asd_ascb_free(ascb);
342 mb();
343 task->task_done(task);
344 }
345 }
346
347 /* ---------- ATA ---------- */
348
asd_build_ata_ascb(struct asd_ascb * ascb,struct sas_task * task,gfp_t gfp_flags)349 static int asd_build_ata_ascb(struct asd_ascb *ascb, struct sas_task *task,
350 gfp_t gfp_flags)
351 {
352 struct domain_device *dev = task->dev;
353 struct scb *scb;
354 u8 flags;
355 int res = 0;
356
357 scb = ascb->scb;
358
359 if (unlikely(task->ata_task.device_control_reg_update))
360 scb->header.opcode = CONTROL_ATA_DEV;
361 else if (dev->sata_dev.class == ATA_DEV_ATAPI)
362 scb->header.opcode = INITIATE_ATAPI_TASK;
363 else
364 scb->header.opcode = INITIATE_ATA_TASK;
365
366 scb->ata_task.proto_conn_rate = (1 << 5); /* STP */
367 if (dev->port->oob_mode == SAS_OOB_MODE)
368 scb->ata_task.proto_conn_rate |= dev->linkrate;
369
370 scb->ata_task.total_xfer_len = cpu_to_le32(task->total_xfer_len);
371 scb->ata_task.fis = task->ata_task.fis;
372 if (likely(!task->ata_task.device_control_reg_update))
373 scb->ata_task.fis.flags |= 0x80; /* C=1: update ATA cmd reg */
374 scb->ata_task.fis.flags &= 0xF0; /* PM_PORT field shall be 0 */
375 if (dev->sata_dev.class == ATA_DEV_ATAPI)
376 memcpy(scb->ata_task.atapi_packet, task->ata_task.atapi_packet,
377 16);
378 scb->ata_task.sister_scb = cpu_to_le16(0xFFFF);
379 scb->ata_task.conn_handle = cpu_to_le16(
380 (u16)(unsigned long)dev->lldd_dev);
381
382 if (likely(!task->ata_task.device_control_reg_update)) {
383 flags = 0;
384 if (task->ata_task.dma_xfer)
385 flags |= DATA_XFER_MODE_DMA;
386 if (task->ata_task.use_ncq &&
387 dev->sata_dev.class != ATA_DEV_ATAPI)
388 flags |= ATA_Q_TYPE_NCQ;
389 flags |= data_dir_flags[task->data_dir];
390 scb->ata_task.ata_flags = flags;
391
392 scb->ata_task.retry_count = task->ata_task.retry_count;
393
394 flags = 0;
395 if (task->ata_task.set_affil_pol)
396 flags |= SET_AFFIL_POLICY;
397 if (task->ata_task.stp_affil_pol)
398 flags |= STP_AFFIL_POLICY;
399 scb->ata_task.flags = flags;
400 }
401 ascb->tasklet_complete = asd_task_tasklet_complete;
402
403 if (likely(!task->ata_task.device_control_reg_update))
404 res = asd_map_scatterlist(task, scb->ata_task.sg_element,
405 gfp_flags);
406
407 return res;
408 }
409
asd_unbuild_ata_ascb(struct asd_ascb * a)410 static void asd_unbuild_ata_ascb(struct asd_ascb *a)
411 {
412 asd_unmap_scatterlist(a);
413 }
414
415 /* ---------- SMP ---------- */
416
asd_build_smp_ascb(struct asd_ascb * ascb,struct sas_task * task,gfp_t gfp_flags)417 static int asd_build_smp_ascb(struct asd_ascb *ascb, struct sas_task *task,
418 gfp_t gfp_flags)
419 {
420 struct asd_ha_struct *asd_ha = ascb->ha;
421 struct domain_device *dev = task->dev;
422 struct scb *scb;
423
424 dma_map_sg(&asd_ha->pcidev->dev, &task->smp_task.smp_req, 1,
425 DMA_TO_DEVICE);
426 dma_map_sg(&asd_ha->pcidev->dev, &task->smp_task.smp_resp, 1,
427 DMA_FROM_DEVICE);
428
429 scb = ascb->scb;
430
431 scb->header.opcode = INITIATE_SMP_TASK;
432
433 scb->smp_task.proto_conn_rate = dev->linkrate;
434
435 scb->smp_task.smp_req.bus_addr =
436 cpu_to_le64((u64)sg_dma_address(&task->smp_task.smp_req));
437 scb->smp_task.smp_req.size =
438 cpu_to_le32((u32)sg_dma_len(&task->smp_task.smp_req)-4);
439
440 scb->smp_task.smp_resp.bus_addr =
441 cpu_to_le64((u64)sg_dma_address(&task->smp_task.smp_resp));
442 scb->smp_task.smp_resp.size =
443 cpu_to_le32((u32)sg_dma_len(&task->smp_task.smp_resp)-4);
444
445 scb->smp_task.sister_scb = cpu_to_le16(0xFFFF);
446 scb->smp_task.conn_handle = cpu_to_le16((u16)
447 (unsigned long)dev->lldd_dev);
448
449 ascb->tasklet_complete = asd_task_tasklet_complete;
450
451 return 0;
452 }
453
asd_unbuild_smp_ascb(struct asd_ascb * a)454 static void asd_unbuild_smp_ascb(struct asd_ascb *a)
455 {
456 struct sas_task *task = a->uldd_task;
457
458 BUG_ON(!task);
459 dma_unmap_sg(&a->ha->pcidev->dev, &task->smp_task.smp_req, 1,
460 DMA_TO_DEVICE);
461 dma_unmap_sg(&a->ha->pcidev->dev, &task->smp_task.smp_resp, 1,
462 DMA_FROM_DEVICE);
463 }
464
465 /* ---------- SSP ---------- */
466
asd_build_ssp_ascb(struct asd_ascb * ascb,struct sas_task * task,gfp_t gfp_flags)467 static int asd_build_ssp_ascb(struct asd_ascb *ascb, struct sas_task *task,
468 gfp_t gfp_flags)
469 {
470 struct domain_device *dev = task->dev;
471 struct scb *scb;
472 int res = 0;
473
474 scb = ascb->scb;
475
476 scb->header.opcode = INITIATE_SSP_TASK;
477
478 scb->ssp_task.proto_conn_rate = (1 << 4); /* SSP */
479 scb->ssp_task.proto_conn_rate |= dev->linkrate;
480 scb->ssp_task.total_xfer_len = cpu_to_le32(task->total_xfer_len);
481 scb->ssp_task.ssp_frame.frame_type = SSP_DATA;
482 memcpy(scb->ssp_task.ssp_frame.hashed_dest_addr, dev->hashed_sas_addr,
483 HASHED_SAS_ADDR_SIZE);
484 memcpy(scb->ssp_task.ssp_frame.hashed_src_addr,
485 dev->port->ha->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
486 scb->ssp_task.ssp_frame.tptt = cpu_to_be16(0xFFFF);
487
488 memcpy(scb->ssp_task.ssp_cmd.lun, task->ssp_task.LUN, 8);
489 if (task->ssp_task.enable_first_burst)
490 scb->ssp_task.ssp_cmd.efb_prio_attr |= EFB_MASK;
491 scb->ssp_task.ssp_cmd.efb_prio_attr |= (task->ssp_task.task_prio << 3);
492 scb->ssp_task.ssp_cmd.efb_prio_attr |= (task->ssp_task.task_attr & 7);
493 memcpy(scb->ssp_task.ssp_cmd.cdb, task->ssp_task.cmd->cmnd,
494 task->ssp_task.cmd->cmd_len);
495
496 scb->ssp_task.sister_scb = cpu_to_le16(0xFFFF);
497 scb->ssp_task.conn_handle = cpu_to_le16(
498 (u16)(unsigned long)dev->lldd_dev);
499 scb->ssp_task.data_dir = data_dir_flags[task->data_dir];
500 scb->ssp_task.retry_count = scb->ssp_task.retry_count;
501
502 ascb->tasklet_complete = asd_task_tasklet_complete;
503
504 res = asd_map_scatterlist(task, scb->ssp_task.sg_element, gfp_flags);
505
506 return res;
507 }
508
asd_unbuild_ssp_ascb(struct asd_ascb * a)509 static void asd_unbuild_ssp_ascb(struct asd_ascb *a)
510 {
511 asd_unmap_scatterlist(a);
512 }
513
514 /* ---------- Execute Task ---------- */
515
asd_can_queue(struct asd_ha_struct * asd_ha,int num)516 static int asd_can_queue(struct asd_ha_struct *asd_ha, int num)
517 {
518 int res = 0;
519 unsigned long flags;
520
521 spin_lock_irqsave(&asd_ha->seq.pend_q_lock, flags);
522 if ((asd_ha->seq.can_queue - num) < 0)
523 res = -SAS_QUEUE_FULL;
524 else
525 asd_ha->seq.can_queue -= num;
526 spin_unlock_irqrestore(&asd_ha->seq.pend_q_lock, flags);
527
528 return res;
529 }
530
asd_execute_task(struct sas_task * task,gfp_t gfp_flags)531 int asd_execute_task(struct sas_task *task, gfp_t gfp_flags)
532 {
533 int res = 0;
534 LIST_HEAD(alist);
535 struct sas_task *t = task;
536 struct asd_ascb *ascb = NULL, *a;
537 struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha;
538 unsigned long flags;
539
540 res = asd_can_queue(asd_ha, 1);
541 if (res)
542 return res;
543
544 res = 1;
545 ascb = asd_ascb_alloc_list(asd_ha, &res, gfp_flags);
546 if (res) {
547 res = -ENOMEM;
548 goto out_err;
549 }
550
551 __list_add(&alist, ascb->list.prev, &ascb->list);
552 list_for_each_entry(a, &alist, list) {
553 a->uldd_task = t;
554 t->lldd_task = a;
555 break;
556 }
557 list_for_each_entry(a, &alist, list) {
558 t = a->uldd_task;
559 a->uldd_timer = 1;
560 if (t->task_proto & SAS_PROTOCOL_STP)
561 t->task_proto = SAS_PROTOCOL_STP;
562 switch (t->task_proto) {
563 case SAS_PROTOCOL_SATA:
564 case SAS_PROTOCOL_STP:
565 res = asd_build_ata_ascb(a, t, gfp_flags);
566 break;
567 case SAS_PROTOCOL_SMP:
568 res = asd_build_smp_ascb(a, t, gfp_flags);
569 break;
570 case SAS_PROTOCOL_SSP:
571 res = asd_build_ssp_ascb(a, t, gfp_flags);
572 break;
573 default:
574 asd_printk("unknown sas_task proto: 0x%x\n",
575 t->task_proto);
576 res = -ENOMEM;
577 break;
578 }
579 if (res)
580 goto out_err_unmap;
581
582 spin_lock_irqsave(&t->task_state_lock, flags);
583 t->task_state_flags |= SAS_TASK_AT_INITIATOR;
584 spin_unlock_irqrestore(&t->task_state_lock, flags);
585 }
586 list_del_init(&alist);
587
588 res = asd_post_ascb_list(asd_ha, ascb, 1);
589 if (unlikely(res)) {
590 a = NULL;
591 __list_add(&alist, ascb->list.prev, &ascb->list);
592 goto out_err_unmap;
593 }
594
595 return 0;
596 out_err_unmap:
597 {
598 struct asd_ascb *b = a;
599 list_for_each_entry(a, &alist, list) {
600 if (a == b)
601 break;
602 t = a->uldd_task;
603 spin_lock_irqsave(&t->task_state_lock, flags);
604 t->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
605 spin_unlock_irqrestore(&t->task_state_lock, flags);
606 switch (t->task_proto) {
607 case SAS_PROTOCOL_SATA:
608 case SAS_PROTOCOL_STP:
609 asd_unbuild_ata_ascb(a);
610 break;
611 case SAS_PROTOCOL_SMP:
612 asd_unbuild_smp_ascb(a);
613 break;
614 case SAS_PROTOCOL_SSP:
615 asd_unbuild_ssp_ascb(a);
616 break;
617 default:
618 break;
619 }
620 t->lldd_task = NULL;
621 }
622 }
623 list_del_init(&alist);
624 out_err:
625 if (ascb)
626 asd_ascb_free_list(ascb);
627 asd_can_dequeue(asd_ha, 1);
628 return res;
629 }
630