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1/*
2 * Aic94xx SAS/SATA Tasks
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
32static void asd_unbuild_ata_ascb(struct asd_ascb *a);
33static void asd_unbuild_smp_ascb(struct asd_ascb *a);
34static void asd_unbuild_ssp_ascb(struct asd_ascb *a);
35
36static void asd_can_dequeue(struct asd_ha_struct *asd_ha, int num)
37{
38 unsigned long flags;
39
40 spin_lock_irqsave(&asd_ha->seq.pend_q_lock, flags);
41 asd_ha->seq.can_queue += num;
42 spin_unlock_irqrestore(&asd_ha->seq.pend_q_lock, flags);
43}
44
45/* PCI_DMA_... to our direction translation.
46 */
47static const u8 data_dir_flags[] = {
48 [PCI_DMA_BIDIRECTIONAL] = DATA_DIR_BYRECIPIENT, /* UNSPECIFIED */
49 [PCI_DMA_TODEVICE] = DATA_DIR_OUT, /* OUTBOUND */
50 [PCI_DMA_FROMDEVICE] = DATA_DIR_IN, /* INBOUND */
51 [PCI_DMA_NONE] = DATA_DIR_NONE, /* NO TRANSFER */
52};
53
54static int asd_map_scatterlist(struct sas_task *task,
55 struct sg_el *sg_arr,
56 gfp_t gfp_flags)
57{
58 struct asd_ascb *ascb = task->lldd_task;
59 struct asd_ha_struct *asd_ha = ascb->ha;
60 struct scatterlist *sc;
61 int num_sg, res;
62
63 if (task->data_dir == PCI_DMA_NONE)
64 return 0;
65
66 if (task->num_scatter == 0) {
67 void *p = task->scatter;
68 dma_addr_t dma = pci_map_single(asd_ha->pcidev, p,
69 task->total_xfer_len,
70 task->data_dir);
71 sg_arr[0].bus_addr = cpu_to_le64((u64)dma);
72 sg_arr[0].size = cpu_to_le32(task->total_xfer_len);
73 sg_arr[0].flags |= ASD_SG_EL_LIST_EOL;
74 return 0;
75 }
76
77 /* STP tasks come from libata which has already mapped
78 * the SG list */
79 if (sas_protocol_ata(task->task_proto))
80 num_sg = task->num_scatter;
81 else
82 num_sg = pci_map_sg(asd_ha->pcidev, task->scatter,
83 task->num_scatter, task->data_dir);
84 if (num_sg == 0)
85 return -ENOMEM;
86
87 if (num_sg > 3) {
88 int i;
89
90 ascb->sg_arr = asd_alloc_coherent(asd_ha,
91 num_sg*sizeof(struct sg_el),
92 gfp_flags);
93 if (!ascb->sg_arr) {
94 res = -ENOMEM;
95 goto err_unmap;
96 }
97 for_each_sg(task->scatter, sc, num_sg, i) {
98 struct sg_el *sg =
99 &((struct sg_el *)ascb->sg_arr->vaddr)[i];
100 sg->bus_addr = cpu_to_le64((u64)sg_dma_address(sc));
101 sg->size = cpu_to_le32((u32)sg_dma_len(sc));
102 if (i == num_sg-1)
103 sg->flags |= ASD_SG_EL_LIST_EOL;
104 }
105
106 for_each_sg(task->scatter, sc, 2, i) {
107 sg_arr[i].bus_addr =
108 cpu_to_le64((u64)sg_dma_address(sc));
109 sg_arr[i].size = cpu_to_le32((u32)sg_dma_len(sc));
110 }
111 sg_arr[1].next_sg_offs = 2 * sizeof(*sg_arr);
112 sg_arr[1].flags |= ASD_SG_EL_LIST_EOS;
113
114 memset(&sg_arr[2], 0, sizeof(*sg_arr));
115 sg_arr[2].bus_addr=cpu_to_le64((u64)ascb->sg_arr->dma_handle);
116 } else {
117 int i;
118 for_each_sg(task->scatter, sc, num_sg, i) {
119 sg_arr[i].bus_addr =
120 cpu_to_le64((u64)sg_dma_address(sc));
121 sg_arr[i].size = cpu_to_le32((u32)sg_dma_len(sc));
122 }
123 sg_arr[i-1].flags |= ASD_SG_EL_LIST_EOL;
124 }
125
126 return 0;
127err_unmap:
128 if (sas_protocol_ata(task->task_proto))
129 pci_unmap_sg(asd_ha->pcidev, task->scatter, task->num_scatter,
130 task->data_dir);
131 return res;
132}
133
134static void asd_unmap_scatterlist(struct asd_ascb *ascb)
135{
136 struct asd_ha_struct *asd_ha = ascb->ha;
137 struct sas_task *task = ascb->uldd_task;
138
139 if (task->data_dir == PCI_DMA_NONE)
140 return;
141
142 if (task->num_scatter == 0) {
143 dma_addr_t dma = (dma_addr_t)
144 le64_to_cpu(ascb->scb->ssp_task.sg_element[0].bus_addr);
145 pci_unmap_single(ascb->ha->pcidev, dma, task->total_xfer_len,
146 task->data_dir);
147 return;
148 }
149
150 asd_free_coherent(asd_ha, ascb->sg_arr);
151 if (task->task_proto != SAS_PROTOCOL_STP)
152 pci_unmap_sg(asd_ha->pcidev, task->scatter, task->num_scatter,
153 task->data_dir);
154}
155
156/* ---------- Task complete tasklet ---------- */
157
158static void asd_get_response_tasklet(struct asd_ascb *ascb,
159 struct done_list_struct *dl)
160{
161 struct asd_ha_struct *asd_ha = ascb->ha;
162 struct sas_task *task = ascb->uldd_task;
163 struct task_status_struct *ts = &task->task_status;
164 unsigned long flags;
165 struct tc_resp_sb_struct {
166 __le16 index_escb;
167 u8 len_lsb;
168 u8 flags;
169 } __attribute__ ((packed)) *resp_sb = (void *) dl->status_block;
170
171/* int size = ((resp_sb->flags & 7) << 8) | resp_sb->len_lsb; */
172 int edb_id = ((resp_sb->flags & 0x70) >> 4)-1;
173 struct asd_ascb *escb;
174 struct asd_dma_tok *edb;
175 void *r;
176
177 spin_lock_irqsave(&asd_ha->seq.tc_index_lock, flags);
178 escb = asd_tc_index_find(&asd_ha->seq,
179 (int)le16_to_cpu(resp_sb->index_escb));
180 spin_unlock_irqrestore(&asd_ha->seq.tc_index_lock, flags);
181
182 if (!escb) {
183 ASD_DPRINTK("Uh-oh! No escb for this dl?!\n");
184 return;
185 }
186
187 ts->buf_valid_size = 0;
188 edb = asd_ha->seq.edb_arr[edb_id + escb->edb_index];
189 r = edb->vaddr;
190 if (task->task_proto == SAS_PROTOCOL_SSP) {
191 struct ssp_response_iu *iu =
192 r + 16 + sizeof(struct ssp_frame_hdr);
193
194 ts->residual = le32_to_cpu(*(__le32 *)r);
195
196 sas_ssp_task_response(&asd_ha->pcidev->dev, task, iu);
197 } else {
198 struct ata_task_resp *resp = (void *) &ts->buf[0];
199
200 ts->residual = le32_to_cpu(*(__le32 *)r);
201
202 if (SAS_STATUS_BUF_SIZE >= sizeof(*resp)) {
203 resp->frame_len = le16_to_cpu(*(__le16 *)(r+6));
204 memcpy(&resp->ending_fis[0], r+16, 24);
205 ts->buf_valid_size = sizeof(*resp);
206 }
207 }
208
209 asd_invalidate_edb(escb, edb_id);
210}
211
212static void asd_task_tasklet_complete(struct asd_ascb *ascb,
213 struct done_list_struct *dl)
214{
215 struct sas_task *task = ascb->uldd_task;
216 struct task_status_struct *ts = &task->task_status;
217 unsigned long flags;
218 u8 opcode = dl->opcode;
219
220 asd_can_dequeue(ascb->ha, 1);
221
222Again:
223 switch (opcode) {
224 case TC_NO_ERROR:
225 ts->resp = SAS_TASK_COMPLETE;
226 ts->stat = SAM_STAT_GOOD;
227 break;
228 case TC_UNDERRUN:
229 ts->resp = SAS_TASK_COMPLETE;
230 ts->stat = SAS_DATA_UNDERRUN;
231 ts->residual = le32_to_cpu(*(__le32 *)dl->status_block);
232 break;
233 case TC_OVERRUN:
234 ts->resp = SAS_TASK_COMPLETE;
235 ts->stat = SAS_DATA_OVERRUN;
236 ts->residual = 0;
237 break;
238 case TC_SSP_RESP:
239 case TC_ATA_RESP:
240 ts->resp = SAS_TASK_COMPLETE;
241 ts->stat = SAS_PROTO_RESPONSE;
242 asd_get_response_tasklet(ascb, dl);
243 break;
244 case TF_OPEN_REJECT:
245 ts->resp = SAS_TASK_UNDELIVERED;
246 ts->stat = SAS_OPEN_REJECT;
247 if (dl->status_block[1] & 2)
248 ts->open_rej_reason = 1 + dl->status_block[2];
249 else if (dl->status_block[1] & 1)
250 ts->open_rej_reason = (dl->status_block[2] >> 4)+10;
251 else
252 ts->open_rej_reason = SAS_OREJ_UNKNOWN;
253 break;
254 case TF_OPEN_TO:
255 ts->resp = SAS_TASK_UNDELIVERED;
256 ts->stat = SAS_OPEN_TO;
257 break;
258 case TF_PHY_DOWN:
259 case TU_PHY_DOWN:
260 ts->resp = SAS_TASK_UNDELIVERED;
261 ts->stat = SAS_PHY_DOWN;
262 break;
263 case TI_PHY_DOWN:
264 ts->resp = SAS_TASK_COMPLETE;
265 ts->stat = SAS_PHY_DOWN;
266 break;
267 case TI_BREAK:
268 case TI_PROTO_ERR:
269 case TI_NAK:
270 case TI_ACK_NAK_TO:
271 case TF_SMP_XMIT_RCV_ERR:
272 case TC_ATA_R_ERR_RECV:
273 ts->resp = SAS_TASK_COMPLETE;
274 ts->stat = SAS_INTERRUPTED;
275 break;
276 case TF_BREAK:
277 case TU_BREAK:
278 case TU_ACK_NAK_TO:
279 case TF_SMPRSP_TO:
280 ts->resp = SAS_TASK_UNDELIVERED;
281 ts->stat = SAS_DEV_NO_RESPONSE;
282 break;
283 case TF_NAK_RECV:
284 ts->resp = SAS_TASK_COMPLETE;
285 ts->stat = SAS_NAK_R_ERR;
286 break;
287 case TA_I_T_NEXUS_LOSS:
288 opcode = dl->status_block[0];
289 goto Again;
290 break;
291 case TF_INV_CONN_HANDLE:
292 ts->resp = SAS_TASK_UNDELIVERED;
293 ts->stat = SAS_DEVICE_UNKNOWN;
294 break;
295 case TF_REQUESTED_N_PENDING:
296 ts->resp = SAS_TASK_UNDELIVERED;
297 ts->stat = SAS_PENDING;
298 break;
299 case TC_TASK_CLEARED:
300 case TA_ON_REQ:
301 ts->resp = SAS_TASK_COMPLETE;
302 ts->stat = SAS_ABORTED_TASK;
303 break;
304
305 case TF_NO_SMP_CONN:
306 case TF_TMF_NO_CTX:
307 case TF_TMF_NO_TAG:
308 case TF_TMF_TAG_FREE:
309 case TF_TMF_TASK_DONE:
310 case TF_TMF_NO_CONN_HANDLE:
311 case TF_IRTT_TO:
312 case TF_IU_SHORT:
313 case TF_DATA_OFFS_ERR:
314 ts->resp = SAS_TASK_UNDELIVERED;
315 ts->stat = SAS_DEV_NO_RESPONSE;
316 break;
317
318 case TC_LINK_ADM_RESP:
319 case TC_CONTROL_PHY:
320 case TC_RESUME:
321 case TC_PARTIAL_SG_LIST:
322 default:
323 ASD_DPRINTK("%s: dl opcode: 0x%x?\n", __func__, opcode);
324 break;
325 }
326
327 switch (task->task_proto) {
328 case SAS_PROTOCOL_SATA:
329 case SAS_PROTOCOL_STP:
330 asd_unbuild_ata_ascb(ascb);
331 break;
332 case SAS_PROTOCOL_SMP:
333 asd_unbuild_smp_ascb(ascb);
334 break;
335 case SAS_PROTOCOL_SSP:
336 asd_unbuild_ssp_ascb(ascb);
337 default:
338 break;
339 }
340
341 spin_lock_irqsave(&task->task_state_lock, flags);
342 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
343 task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
344 task->task_state_flags |= SAS_TASK_STATE_DONE;
345 if (unlikely((task->task_state_flags & SAS_TASK_STATE_ABORTED))) {
346 struct completion *completion = ascb->completion;
347 spin_unlock_irqrestore(&task->task_state_lock, flags);
348 ASD_DPRINTK("task 0x%p done with opcode 0x%x resp 0x%x "
349 "stat 0x%x but aborted by upper layer!\n",
350 task, opcode, ts->resp, ts->stat);
351 if (completion)
352 complete(completion);
353 } else {
354 spin_unlock_irqrestore(&task->task_state_lock, flags);
355 task->lldd_task = NULL;
356 asd_ascb_free(ascb);
357 mb();
358 task->task_done(task);
359 }
360}
361
362/* ---------- ATA ---------- */
363
364static int asd_build_ata_ascb(struct asd_ascb *ascb, struct sas_task *task,
365 gfp_t gfp_flags)
366{
367 struct domain_device *dev = task->dev;
368 struct scb *scb;
369 u8 flags;
370 int res = 0;
371
372 scb = ascb->scb;
373
374 if (unlikely(task->ata_task.device_control_reg_update))
375 scb->header.opcode = CONTROL_ATA_DEV;
376 else if (dev->sata_dev.command_set == ATA_COMMAND_SET)
377 scb->header.opcode = INITIATE_ATA_TASK;
378 else
379 scb->header.opcode = INITIATE_ATAPI_TASK;
380
381 scb->ata_task.proto_conn_rate = (1 << 5); /* STP */
382 if (dev->port->oob_mode == SAS_OOB_MODE)
383 scb->ata_task.proto_conn_rate |= dev->linkrate;
384
385 scb->ata_task.total_xfer_len = cpu_to_le32(task->total_xfer_len);
386 scb->ata_task.fis = task->ata_task.fis;
387 if (likely(!task->ata_task.device_control_reg_update))
388 scb->ata_task.fis.flags |= 0x80; /* C=1: update ATA cmd reg */
389 scb->ata_task.fis.flags &= 0xF0; /* PM_PORT field shall be 0 */
390 if (dev->sata_dev.command_set == ATAPI_COMMAND_SET)
391 memcpy(scb->ata_task.atapi_packet, task->ata_task.atapi_packet,
392 16);
393 scb->ata_task.sister_scb = cpu_to_le16(0xFFFF);
394 scb->ata_task.conn_handle = cpu_to_le16(
395 (u16)(unsigned long)dev->lldd_dev);
396
397 if (likely(!task->ata_task.device_control_reg_update)) {
398 flags = 0;
399 if (task->ata_task.dma_xfer)
400 flags |= DATA_XFER_MODE_DMA;
401 if (task->ata_task.use_ncq &&
402 dev->sata_dev.command_set != ATAPI_COMMAND_SET)
403 flags |= ATA_Q_TYPE_NCQ;
404 flags |= data_dir_flags[task->data_dir];
405 scb->ata_task.ata_flags = flags;
406
407 scb->ata_task.retry_count = task->ata_task.retry_count;
408
409 flags = 0;
410 if (task->ata_task.set_affil_pol)
411 flags |= SET_AFFIL_POLICY;
412 if (task->ata_task.stp_affil_pol)
413 flags |= STP_AFFIL_POLICY;
414 scb->ata_task.flags = flags;
415 }
416 ascb->tasklet_complete = asd_task_tasklet_complete;
417
418 if (likely(!task->ata_task.device_control_reg_update))
419 res = asd_map_scatterlist(task, scb->ata_task.sg_element,
420 gfp_flags);
421
422 return res;
423}
424
425static void asd_unbuild_ata_ascb(struct asd_ascb *a)
426{
427 asd_unmap_scatterlist(a);
428}
429
430/* ---------- SMP ---------- */
431
432static int asd_build_smp_ascb(struct asd_ascb *ascb, struct sas_task *task,
433 gfp_t gfp_flags)
434{
435 struct asd_ha_struct *asd_ha = ascb->ha;
436 struct domain_device *dev = task->dev;
437 struct scb *scb;
438
439 pci_map_sg(asd_ha->pcidev, &task->smp_task.smp_req, 1,
440 PCI_DMA_TODEVICE);
441 pci_map_sg(asd_ha->pcidev, &task->smp_task.smp_resp, 1,
442 PCI_DMA_FROMDEVICE);
443
444 scb = ascb->scb;
445
446 scb->header.opcode = INITIATE_SMP_TASK;
447
448 scb->smp_task.proto_conn_rate = dev->linkrate;
449
450 scb->smp_task.smp_req.bus_addr =
451 cpu_to_le64((u64)sg_dma_address(&task->smp_task.smp_req));
452 scb->smp_task.smp_req.size =
453 cpu_to_le32((u32)sg_dma_len(&task->smp_task.smp_req)-4);
454
455 scb->smp_task.smp_resp.bus_addr =
456 cpu_to_le64((u64)sg_dma_address(&task->smp_task.smp_resp));
457 scb->smp_task.smp_resp.size =
458 cpu_to_le32((u32)sg_dma_len(&task->smp_task.smp_resp)-4);
459
460 scb->smp_task.sister_scb = cpu_to_le16(0xFFFF);
461 scb->smp_task.conn_handle = cpu_to_le16((u16)
462 (unsigned long)dev->lldd_dev);
463
464 ascb->tasklet_complete = asd_task_tasklet_complete;
465
466 return 0;
467}
468
469static void asd_unbuild_smp_ascb(struct asd_ascb *a)
470{
471 struct sas_task *task = a->uldd_task;
472
473 BUG_ON(!task);
474 pci_unmap_sg(a->ha->pcidev, &task->smp_task.smp_req, 1,
475 PCI_DMA_TODEVICE);
476 pci_unmap_sg(a->ha->pcidev, &task->smp_task.smp_resp, 1,
477 PCI_DMA_FROMDEVICE);
478}
479
480/* ---------- SSP ---------- */
481
482static int asd_build_ssp_ascb(struct asd_ascb *ascb, struct sas_task *task,
483 gfp_t gfp_flags)
484{
485 struct domain_device *dev = task->dev;
486 struct scb *scb;
487 int res = 0;
488
489 scb = ascb->scb;
490
491 scb->header.opcode = INITIATE_SSP_TASK;
492
493 scb->ssp_task.proto_conn_rate = (1 << 4); /* SSP */
494 scb->ssp_task.proto_conn_rate |= dev->linkrate;
495 scb->ssp_task.total_xfer_len = cpu_to_le32(task->total_xfer_len);
496 scb->ssp_task.ssp_frame.frame_type = SSP_DATA;
497 memcpy(scb->ssp_task.ssp_frame.hashed_dest_addr, dev->hashed_sas_addr,
498 HASHED_SAS_ADDR_SIZE);
499 memcpy(scb->ssp_task.ssp_frame.hashed_src_addr,
500 dev->port->ha->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
501 scb->ssp_task.ssp_frame.tptt = cpu_to_be16(0xFFFF);
502
503 memcpy(scb->ssp_task.ssp_cmd.lun, task->ssp_task.LUN, 8);
504 if (task->ssp_task.enable_first_burst)
505 scb->ssp_task.ssp_cmd.efb_prio_attr |= EFB_MASK;
506 scb->ssp_task.ssp_cmd.efb_prio_attr |= (task->ssp_task.task_prio << 3);
507 scb->ssp_task.ssp_cmd.efb_prio_attr |= (task->ssp_task.task_attr & 7);
508 memcpy(scb->ssp_task.ssp_cmd.cdb, task->ssp_task.cdb, 16);
509
510 scb->ssp_task.sister_scb = cpu_to_le16(0xFFFF);
511 scb->ssp_task.conn_handle = cpu_to_le16(
512 (u16)(unsigned long)dev->lldd_dev);
513 scb->ssp_task.data_dir = data_dir_flags[task->data_dir];
514 scb->ssp_task.retry_count = scb->ssp_task.retry_count;
515
516 ascb->tasklet_complete = asd_task_tasklet_complete;
517
518 res = asd_map_scatterlist(task, scb->ssp_task.sg_element, gfp_flags);
519
520 return res;
521}
522
523static void asd_unbuild_ssp_ascb(struct asd_ascb *a)
524{
525 asd_unmap_scatterlist(a);
526}
527
528/* ---------- Execute Task ---------- */
529
530static int asd_can_queue(struct asd_ha_struct *asd_ha, int num)
531{
532 int res = 0;
533 unsigned long flags;
534
535 spin_lock_irqsave(&asd_ha->seq.pend_q_lock, flags);
536 if ((asd_ha->seq.can_queue - num) < 0)
537 res = -SAS_QUEUE_FULL;
538 else
539 asd_ha->seq.can_queue -= num;
540 spin_unlock_irqrestore(&asd_ha->seq.pend_q_lock, flags);
541
542 return res;
543}
544
545int asd_execute_task(struct sas_task *task, const int num,
546 gfp_t gfp_flags)
547{
548 int res = 0;
549 LIST_HEAD(alist);
550 struct sas_task *t = task;
551 struct asd_ascb *ascb = NULL, *a;
552 struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha;
553 unsigned long flags;
554
555 res = asd_can_queue(asd_ha, num);
556 if (res)
557 return res;
558
559 res = num;
560 ascb = asd_ascb_alloc_list(asd_ha, &res, gfp_flags);
561 if (res) {
562 res = -ENOMEM;
563 goto out_err;
564 }
565
566 __list_add(&alist, ascb->list.prev, &ascb->list);
567 list_for_each_entry(a, &alist, list) {
568 a->uldd_task = t;
569 t->lldd_task = a;
570 t = list_entry(t->list.next, struct sas_task, list);
571 }
572 list_for_each_entry(a, &alist, list) {
573 t = a->uldd_task;
574 a->uldd_timer = 1;
575 if (t->task_proto & SAS_PROTOCOL_STP)
576 t->task_proto = SAS_PROTOCOL_STP;
577 switch (t->task_proto) {
578 case SAS_PROTOCOL_SATA:
579 case SAS_PROTOCOL_STP:
580 res = asd_build_ata_ascb(a, t, gfp_flags);
581 break;
582 case SAS_PROTOCOL_SMP:
583 res = asd_build_smp_ascb(a, t, gfp_flags);
584 break;
585 case SAS_PROTOCOL_SSP:
586 res = asd_build_ssp_ascb(a, t, gfp_flags);
587 break;
588 default:
589 asd_printk("unknown sas_task proto: 0x%x\n",
590 t->task_proto);
591 res = -ENOMEM;
592 break;
593 }
594 if (res)
595 goto out_err_unmap;
596
597 spin_lock_irqsave(&t->task_state_lock, flags);
598 t->task_state_flags |= SAS_TASK_AT_INITIATOR;
599 spin_unlock_irqrestore(&t->task_state_lock, flags);
600 }
601 list_del_init(&alist);
602
603 res = asd_post_ascb_list(asd_ha, ascb, num);
604 if (unlikely(res)) {
605 a = NULL;
606 __list_add(&alist, ascb->list.prev, &ascb->list);
607 goto out_err_unmap;
608 }
609
610 return 0;
611out_err_unmap:
612 {
613 struct asd_ascb *b = a;
614 list_for_each_entry(a, &alist, list) {
615 if (a == b)
616 break;
617 t = a->uldd_task;
618 spin_lock_irqsave(&t->task_state_lock, flags);
619 t->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
620 spin_unlock_irqrestore(&t->task_state_lock, flags);
621 switch (t->task_proto) {
622 case SAS_PROTOCOL_SATA:
623 case SAS_PROTOCOL_STP:
624 asd_unbuild_ata_ascb(a);
625 break;
626 case SAS_PROTOCOL_SMP:
627 asd_unbuild_smp_ascb(a);
628 break;
629 case SAS_PROTOCOL_SSP:
630 asd_unbuild_ssp_ascb(a);
631 default:
632 break;
633 }
634 t->lldd_task = NULL;
635 }
636 }
637 list_del_init(&alist);
638out_err:
639 if (ascb)
640 asd_ascb_free_list(ascb);
641 asd_can_dequeue(asd_ha, num);
642 return res;
643}
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
14static void asd_unbuild_ata_ascb(struct asd_ascb *a);
15static void asd_unbuild_smp_ascb(struct asd_ascb *a);
16static void asd_unbuild_ssp_ascb(struct asd_ascb *a);
17
18static 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 */
29static 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
36static 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 sg_arr[0].bus_addr = cpu_to_le64((u64)dma);
54 sg_arr[0].size = cpu_to_le32(task->total_xfer_len);
55 sg_arr[0].flags |= ASD_SG_EL_LIST_EOL;
56 return 0;
57 }
58
59 /* STP tasks come from libata which has already mapped
60 * the SG list */
61 if (sas_protocol_ata(task->task_proto))
62 num_sg = task->num_scatter;
63 else
64 num_sg = dma_map_sg(&asd_ha->pcidev->dev, task->scatter,
65 task->num_scatter, task->data_dir);
66 if (num_sg == 0)
67 return -ENOMEM;
68
69 if (num_sg > 3) {
70 int i;
71
72 ascb->sg_arr = asd_alloc_coherent(asd_ha,
73 num_sg*sizeof(struct sg_el),
74 gfp_flags);
75 if (!ascb->sg_arr) {
76 res = -ENOMEM;
77 goto err_unmap;
78 }
79 for_each_sg(task->scatter, sc, num_sg, i) {
80 struct sg_el *sg =
81 &((struct sg_el *)ascb->sg_arr->vaddr)[i];
82 sg->bus_addr = cpu_to_le64((u64)sg_dma_address(sc));
83 sg->size = cpu_to_le32((u32)sg_dma_len(sc));
84 if (i == num_sg-1)
85 sg->flags |= ASD_SG_EL_LIST_EOL;
86 }
87
88 for_each_sg(task->scatter, sc, 2, i) {
89 sg_arr[i].bus_addr =
90 cpu_to_le64((u64)sg_dma_address(sc));
91 sg_arr[i].size = cpu_to_le32((u32)sg_dma_len(sc));
92 }
93 sg_arr[1].next_sg_offs = 2 * sizeof(*sg_arr);
94 sg_arr[1].flags |= ASD_SG_EL_LIST_EOS;
95
96 memset(&sg_arr[2], 0, sizeof(*sg_arr));
97 sg_arr[2].bus_addr=cpu_to_le64((u64)ascb->sg_arr->dma_handle);
98 } else {
99 int i;
100 for_each_sg(task->scatter, sc, num_sg, i) {
101 sg_arr[i].bus_addr =
102 cpu_to_le64((u64)sg_dma_address(sc));
103 sg_arr[i].size = cpu_to_le32((u32)sg_dma_len(sc));
104 }
105 sg_arr[i-1].flags |= ASD_SG_EL_LIST_EOL;
106 }
107
108 return 0;
109err_unmap:
110 if (sas_protocol_ata(task->task_proto))
111 dma_unmap_sg(&asd_ha->pcidev->dev, task->scatter,
112 task->num_scatter, task->data_dir);
113 return res;
114}
115
116static void asd_unmap_scatterlist(struct asd_ascb *ascb)
117{
118 struct asd_ha_struct *asd_ha = ascb->ha;
119 struct sas_task *task = ascb->uldd_task;
120
121 if (task->data_dir == DMA_NONE)
122 return;
123
124 if (task->num_scatter == 0) {
125 dma_addr_t dma = (dma_addr_t)
126 le64_to_cpu(ascb->scb->ssp_task.sg_element[0].bus_addr);
127 dma_unmap_single(&ascb->ha->pcidev->dev, dma,
128 task->total_xfer_len, task->data_dir);
129 return;
130 }
131
132 asd_free_coherent(asd_ha, ascb->sg_arr);
133 if (task->task_proto != SAS_PROTOCOL_STP)
134 dma_unmap_sg(&asd_ha->pcidev->dev, task->scatter,
135 task->num_scatter, task->data_dir);
136}
137
138/* ---------- Task complete tasklet ---------- */
139
140static void asd_get_response_tasklet(struct asd_ascb *ascb,
141 struct done_list_struct *dl)
142{
143 struct asd_ha_struct *asd_ha = ascb->ha;
144 struct sas_task *task = ascb->uldd_task;
145 struct task_status_struct *ts = &task->task_status;
146 unsigned long flags;
147 struct tc_resp_sb_struct {
148 __le16 index_escb;
149 u8 len_lsb;
150 u8 flags;
151 } __attribute__ ((packed)) *resp_sb = (void *) dl->status_block;
152
153/* int size = ((resp_sb->flags & 7) << 8) | resp_sb->len_lsb; */
154 int edb_id = ((resp_sb->flags & 0x70) >> 4)-1;
155 struct asd_ascb *escb;
156 struct asd_dma_tok *edb;
157 void *r;
158
159 spin_lock_irqsave(&asd_ha->seq.tc_index_lock, flags);
160 escb = asd_tc_index_find(&asd_ha->seq,
161 (int)le16_to_cpu(resp_sb->index_escb));
162 spin_unlock_irqrestore(&asd_ha->seq.tc_index_lock, flags);
163
164 if (!escb) {
165 ASD_DPRINTK("Uh-oh! No escb for this dl?!\n");
166 return;
167 }
168
169 ts->buf_valid_size = 0;
170 edb = asd_ha->seq.edb_arr[edb_id + escb->edb_index];
171 r = edb->vaddr;
172 if (task->task_proto == SAS_PROTOCOL_SSP) {
173 struct ssp_response_iu *iu =
174 r + 16 + sizeof(struct ssp_frame_hdr);
175
176 ts->residual = le32_to_cpu(*(__le32 *)r);
177
178 sas_ssp_task_response(&asd_ha->pcidev->dev, task, iu);
179 } else {
180 struct ata_task_resp *resp = (void *) &ts->buf[0];
181
182 ts->residual = le32_to_cpu(*(__le32 *)r);
183
184 if (SAS_STATUS_BUF_SIZE >= sizeof(*resp)) {
185 resp->frame_len = le16_to_cpu(*(__le16 *)(r+6));
186 memcpy(&resp->ending_fis[0], r+16, ATA_RESP_FIS_SIZE);
187 ts->buf_valid_size = sizeof(*resp);
188 }
189 }
190
191 asd_invalidate_edb(escb, edb_id);
192}
193
194static void asd_task_tasklet_complete(struct asd_ascb *ascb,
195 struct done_list_struct *dl)
196{
197 struct sas_task *task = ascb->uldd_task;
198 struct task_status_struct *ts = &task->task_status;
199 unsigned long flags;
200 u8 opcode = dl->opcode;
201
202 asd_can_dequeue(ascb->ha, 1);
203
204Again:
205 switch (opcode) {
206 case TC_NO_ERROR:
207 ts->resp = SAS_TASK_COMPLETE;
208 ts->stat = SAM_STAT_GOOD;
209 break;
210 case TC_UNDERRUN:
211 ts->resp = SAS_TASK_COMPLETE;
212 ts->stat = SAS_DATA_UNDERRUN;
213 ts->residual = le32_to_cpu(*(__le32 *)dl->status_block);
214 break;
215 case TC_OVERRUN:
216 ts->resp = SAS_TASK_COMPLETE;
217 ts->stat = SAS_DATA_OVERRUN;
218 ts->residual = 0;
219 break;
220 case TC_SSP_RESP:
221 case TC_ATA_RESP:
222 ts->resp = SAS_TASK_COMPLETE;
223 ts->stat = SAS_PROTO_RESPONSE;
224 asd_get_response_tasklet(ascb, dl);
225 break;
226 case TF_OPEN_REJECT:
227 ts->resp = SAS_TASK_UNDELIVERED;
228 ts->stat = SAS_OPEN_REJECT;
229 if (dl->status_block[1] & 2)
230 ts->open_rej_reason = 1 + dl->status_block[2];
231 else if (dl->status_block[1] & 1)
232 ts->open_rej_reason = (dl->status_block[2] >> 4)+10;
233 else
234 ts->open_rej_reason = SAS_OREJ_UNKNOWN;
235 break;
236 case TF_OPEN_TO:
237 ts->resp = SAS_TASK_UNDELIVERED;
238 ts->stat = SAS_OPEN_TO;
239 break;
240 case TF_PHY_DOWN:
241 case TU_PHY_DOWN:
242 ts->resp = SAS_TASK_UNDELIVERED;
243 ts->stat = SAS_PHY_DOWN;
244 break;
245 case TI_PHY_DOWN:
246 ts->resp = SAS_TASK_COMPLETE;
247 ts->stat = SAS_PHY_DOWN;
248 break;
249 case TI_BREAK:
250 case TI_PROTO_ERR:
251 case TI_NAK:
252 case TI_ACK_NAK_TO:
253 case TF_SMP_XMIT_RCV_ERR:
254 case TC_ATA_R_ERR_RECV:
255 ts->resp = SAS_TASK_COMPLETE;
256 ts->stat = SAS_INTERRUPTED;
257 break;
258 case TF_BREAK:
259 case TU_BREAK:
260 case TU_ACK_NAK_TO:
261 case TF_SMPRSP_TO:
262 ts->resp = SAS_TASK_UNDELIVERED;
263 ts->stat = SAS_DEV_NO_RESPONSE;
264 break;
265 case TF_NAK_RECV:
266 ts->resp = SAS_TASK_COMPLETE;
267 ts->stat = SAS_NAK_R_ERR;
268 break;
269 case TA_I_T_NEXUS_LOSS:
270 opcode = dl->status_block[0];
271 goto Again;
272 break;
273 case TF_INV_CONN_HANDLE:
274 ts->resp = SAS_TASK_UNDELIVERED;
275 ts->stat = SAS_DEVICE_UNKNOWN;
276 break;
277 case TF_REQUESTED_N_PENDING:
278 ts->resp = SAS_TASK_UNDELIVERED;
279 ts->stat = SAS_PENDING;
280 break;
281 case TC_TASK_CLEARED:
282 case TA_ON_REQ:
283 ts->resp = SAS_TASK_COMPLETE;
284 ts->stat = SAS_ABORTED_TASK;
285 break;
286
287 case TF_NO_SMP_CONN:
288 case TF_TMF_NO_CTX:
289 case TF_TMF_NO_TAG:
290 case TF_TMF_TAG_FREE:
291 case TF_TMF_TASK_DONE:
292 case TF_TMF_NO_CONN_HANDLE:
293 case TF_IRTT_TO:
294 case TF_IU_SHORT:
295 case TF_DATA_OFFS_ERR:
296 ts->resp = SAS_TASK_UNDELIVERED;
297 ts->stat = SAS_DEV_NO_RESPONSE;
298 break;
299
300 case TC_LINK_ADM_RESP:
301 case TC_CONTROL_PHY:
302 case TC_RESUME:
303 case TC_PARTIAL_SG_LIST:
304 default:
305 ASD_DPRINTK("%s: dl opcode: 0x%x?\n", __func__, opcode);
306 break;
307 }
308
309 switch (task->task_proto) {
310 case SAS_PROTOCOL_SATA:
311 case SAS_PROTOCOL_STP:
312 asd_unbuild_ata_ascb(ascb);
313 break;
314 case SAS_PROTOCOL_SMP:
315 asd_unbuild_smp_ascb(ascb);
316 break;
317 case SAS_PROTOCOL_SSP:
318 asd_unbuild_ssp_ascb(ascb);
319 default:
320 break;
321 }
322
323 spin_lock_irqsave(&task->task_state_lock, flags);
324 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
325 task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
326 task->task_state_flags |= SAS_TASK_STATE_DONE;
327 if (unlikely((task->task_state_flags & SAS_TASK_STATE_ABORTED))) {
328 struct completion *completion = ascb->completion;
329 spin_unlock_irqrestore(&task->task_state_lock, flags);
330 ASD_DPRINTK("task 0x%p done with opcode 0x%x resp 0x%x "
331 "stat 0x%x but aborted by upper layer!\n",
332 task, opcode, ts->resp, ts->stat);
333 if (completion)
334 complete(completion);
335 } else {
336 spin_unlock_irqrestore(&task->task_state_lock, flags);
337 task->lldd_task = NULL;
338 asd_ascb_free(ascb);
339 mb();
340 task->task_done(task);
341 }
342}
343
344/* ---------- ATA ---------- */
345
346static int asd_build_ata_ascb(struct asd_ascb *ascb, struct sas_task *task,
347 gfp_t gfp_flags)
348{
349 struct domain_device *dev = task->dev;
350 struct scb *scb;
351 u8 flags;
352 int res = 0;
353
354 scb = ascb->scb;
355
356 if (unlikely(task->ata_task.device_control_reg_update))
357 scb->header.opcode = CONTROL_ATA_DEV;
358 else if (dev->sata_dev.class == ATA_DEV_ATAPI)
359 scb->header.opcode = INITIATE_ATAPI_TASK;
360 else
361 scb->header.opcode = INITIATE_ATA_TASK;
362
363 scb->ata_task.proto_conn_rate = (1 << 5); /* STP */
364 if (dev->port->oob_mode == SAS_OOB_MODE)
365 scb->ata_task.proto_conn_rate |= dev->linkrate;
366
367 scb->ata_task.total_xfer_len = cpu_to_le32(task->total_xfer_len);
368 scb->ata_task.fis = task->ata_task.fis;
369 if (likely(!task->ata_task.device_control_reg_update))
370 scb->ata_task.fis.flags |= 0x80; /* C=1: update ATA cmd reg */
371 scb->ata_task.fis.flags &= 0xF0; /* PM_PORT field shall be 0 */
372 if (dev->sata_dev.class == ATA_DEV_ATAPI)
373 memcpy(scb->ata_task.atapi_packet, task->ata_task.atapi_packet,
374 16);
375 scb->ata_task.sister_scb = cpu_to_le16(0xFFFF);
376 scb->ata_task.conn_handle = cpu_to_le16(
377 (u16)(unsigned long)dev->lldd_dev);
378
379 if (likely(!task->ata_task.device_control_reg_update)) {
380 flags = 0;
381 if (task->ata_task.dma_xfer)
382 flags |= DATA_XFER_MODE_DMA;
383 if (task->ata_task.use_ncq &&
384 dev->sata_dev.class != ATA_DEV_ATAPI)
385 flags |= ATA_Q_TYPE_NCQ;
386 flags |= data_dir_flags[task->data_dir];
387 scb->ata_task.ata_flags = flags;
388
389 scb->ata_task.retry_count = task->ata_task.retry_count;
390
391 flags = 0;
392 if (task->ata_task.set_affil_pol)
393 flags |= SET_AFFIL_POLICY;
394 if (task->ata_task.stp_affil_pol)
395 flags |= STP_AFFIL_POLICY;
396 scb->ata_task.flags = flags;
397 }
398 ascb->tasklet_complete = asd_task_tasklet_complete;
399
400 if (likely(!task->ata_task.device_control_reg_update))
401 res = asd_map_scatterlist(task, scb->ata_task.sg_element,
402 gfp_flags);
403
404 return res;
405}
406
407static void asd_unbuild_ata_ascb(struct asd_ascb *a)
408{
409 asd_unmap_scatterlist(a);
410}
411
412/* ---------- SMP ---------- */
413
414static int asd_build_smp_ascb(struct asd_ascb *ascb, struct sas_task *task,
415 gfp_t gfp_flags)
416{
417 struct asd_ha_struct *asd_ha = ascb->ha;
418 struct domain_device *dev = task->dev;
419 struct scb *scb;
420
421 dma_map_sg(&asd_ha->pcidev->dev, &task->smp_task.smp_req, 1,
422 DMA_TO_DEVICE);
423 dma_map_sg(&asd_ha->pcidev->dev, &task->smp_task.smp_resp, 1,
424 DMA_FROM_DEVICE);
425
426 scb = ascb->scb;
427
428 scb->header.opcode = INITIATE_SMP_TASK;
429
430 scb->smp_task.proto_conn_rate = dev->linkrate;
431
432 scb->smp_task.smp_req.bus_addr =
433 cpu_to_le64((u64)sg_dma_address(&task->smp_task.smp_req));
434 scb->smp_task.smp_req.size =
435 cpu_to_le32((u32)sg_dma_len(&task->smp_task.smp_req)-4);
436
437 scb->smp_task.smp_resp.bus_addr =
438 cpu_to_le64((u64)sg_dma_address(&task->smp_task.smp_resp));
439 scb->smp_task.smp_resp.size =
440 cpu_to_le32((u32)sg_dma_len(&task->smp_task.smp_resp)-4);
441
442 scb->smp_task.sister_scb = cpu_to_le16(0xFFFF);
443 scb->smp_task.conn_handle = cpu_to_le16((u16)
444 (unsigned long)dev->lldd_dev);
445
446 ascb->tasklet_complete = asd_task_tasklet_complete;
447
448 return 0;
449}
450
451static void asd_unbuild_smp_ascb(struct asd_ascb *a)
452{
453 struct sas_task *task = a->uldd_task;
454
455 BUG_ON(!task);
456 dma_unmap_sg(&a->ha->pcidev->dev, &task->smp_task.smp_req, 1,
457 DMA_TO_DEVICE);
458 dma_unmap_sg(&a->ha->pcidev->dev, &task->smp_task.smp_resp, 1,
459 DMA_FROM_DEVICE);
460}
461
462/* ---------- SSP ---------- */
463
464static int asd_build_ssp_ascb(struct asd_ascb *ascb, struct sas_task *task,
465 gfp_t gfp_flags)
466{
467 struct domain_device *dev = task->dev;
468 struct scb *scb;
469 int res = 0;
470
471 scb = ascb->scb;
472
473 scb->header.opcode = INITIATE_SSP_TASK;
474
475 scb->ssp_task.proto_conn_rate = (1 << 4); /* SSP */
476 scb->ssp_task.proto_conn_rate |= dev->linkrate;
477 scb->ssp_task.total_xfer_len = cpu_to_le32(task->total_xfer_len);
478 scb->ssp_task.ssp_frame.frame_type = SSP_DATA;
479 memcpy(scb->ssp_task.ssp_frame.hashed_dest_addr, dev->hashed_sas_addr,
480 HASHED_SAS_ADDR_SIZE);
481 memcpy(scb->ssp_task.ssp_frame.hashed_src_addr,
482 dev->port->ha->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
483 scb->ssp_task.ssp_frame.tptt = cpu_to_be16(0xFFFF);
484
485 memcpy(scb->ssp_task.ssp_cmd.lun, task->ssp_task.LUN, 8);
486 if (task->ssp_task.enable_first_burst)
487 scb->ssp_task.ssp_cmd.efb_prio_attr |= EFB_MASK;
488 scb->ssp_task.ssp_cmd.efb_prio_attr |= (task->ssp_task.task_prio << 3);
489 scb->ssp_task.ssp_cmd.efb_prio_attr |= (task->ssp_task.task_attr & 7);
490 memcpy(scb->ssp_task.ssp_cmd.cdb, task->ssp_task.cmd->cmnd,
491 task->ssp_task.cmd->cmd_len);
492
493 scb->ssp_task.sister_scb = cpu_to_le16(0xFFFF);
494 scb->ssp_task.conn_handle = cpu_to_le16(
495 (u16)(unsigned long)dev->lldd_dev);
496 scb->ssp_task.data_dir = data_dir_flags[task->data_dir];
497 scb->ssp_task.retry_count = scb->ssp_task.retry_count;
498
499 ascb->tasklet_complete = asd_task_tasklet_complete;
500
501 res = asd_map_scatterlist(task, scb->ssp_task.sg_element, gfp_flags);
502
503 return res;
504}
505
506static void asd_unbuild_ssp_ascb(struct asd_ascb *a)
507{
508 asd_unmap_scatterlist(a);
509}
510
511/* ---------- Execute Task ---------- */
512
513static int asd_can_queue(struct asd_ha_struct *asd_ha, int num)
514{
515 int res = 0;
516 unsigned long flags;
517
518 spin_lock_irqsave(&asd_ha->seq.pend_q_lock, flags);
519 if ((asd_ha->seq.can_queue - num) < 0)
520 res = -SAS_QUEUE_FULL;
521 else
522 asd_ha->seq.can_queue -= num;
523 spin_unlock_irqrestore(&asd_ha->seq.pend_q_lock, flags);
524
525 return res;
526}
527
528int asd_execute_task(struct sas_task *task, gfp_t gfp_flags)
529{
530 int res = 0;
531 LIST_HEAD(alist);
532 struct sas_task *t = task;
533 struct asd_ascb *ascb = NULL, *a;
534 struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha;
535 unsigned long flags;
536
537 res = asd_can_queue(asd_ha, 1);
538 if (res)
539 return res;
540
541 res = 1;
542 ascb = asd_ascb_alloc_list(asd_ha, &res, gfp_flags);
543 if (res) {
544 res = -ENOMEM;
545 goto out_err;
546 }
547
548 __list_add(&alist, ascb->list.prev, &ascb->list);
549 list_for_each_entry(a, &alist, list) {
550 a->uldd_task = t;
551 t->lldd_task = a;
552 break;
553 }
554 list_for_each_entry(a, &alist, list) {
555 t = a->uldd_task;
556 a->uldd_timer = 1;
557 if (t->task_proto & SAS_PROTOCOL_STP)
558 t->task_proto = SAS_PROTOCOL_STP;
559 switch (t->task_proto) {
560 case SAS_PROTOCOL_SATA:
561 case SAS_PROTOCOL_STP:
562 res = asd_build_ata_ascb(a, t, gfp_flags);
563 break;
564 case SAS_PROTOCOL_SMP:
565 res = asd_build_smp_ascb(a, t, gfp_flags);
566 break;
567 case SAS_PROTOCOL_SSP:
568 res = asd_build_ssp_ascb(a, t, gfp_flags);
569 break;
570 default:
571 asd_printk("unknown sas_task proto: 0x%x\n",
572 t->task_proto);
573 res = -ENOMEM;
574 break;
575 }
576 if (res)
577 goto out_err_unmap;
578
579 spin_lock_irqsave(&t->task_state_lock, flags);
580 t->task_state_flags |= SAS_TASK_AT_INITIATOR;
581 spin_unlock_irqrestore(&t->task_state_lock, flags);
582 }
583 list_del_init(&alist);
584
585 res = asd_post_ascb_list(asd_ha, ascb, 1);
586 if (unlikely(res)) {
587 a = NULL;
588 __list_add(&alist, ascb->list.prev, &ascb->list);
589 goto out_err_unmap;
590 }
591
592 return 0;
593out_err_unmap:
594 {
595 struct asd_ascb *b = a;
596 list_for_each_entry(a, &alist, list) {
597 if (a == b)
598 break;
599 t = a->uldd_task;
600 spin_lock_irqsave(&t->task_state_lock, flags);
601 t->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
602 spin_unlock_irqrestore(&t->task_state_lock, flags);
603 switch (t->task_proto) {
604 case SAS_PROTOCOL_SATA:
605 case SAS_PROTOCOL_STP:
606 asd_unbuild_ata_ascb(a);
607 break;
608 case SAS_PROTOCOL_SMP:
609 asd_unbuild_smp_ascb(a);
610 break;
611 case SAS_PROTOCOL_SSP:
612 asd_unbuild_ssp_ascb(a);
613 default:
614 break;
615 }
616 t->lldd_task = NULL;
617 }
618 }
619 list_del_init(&alist);
620out_err:
621 if (ascb)
622 asd_ascb_free_list(ascb);
623 asd_can_dequeue(asd_ha, 1);
624 return res;
625}