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allow coexistance of N build and AC build.
[tomato.git] / release / src-rt-6.x / linux / linux-2.6 / drivers / scsi / aic94xx / aic94xx_task.c
blobe2ad5bed94035c0dd594c237e0c59a8dba3dd1c1
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
32 static void asd_unbuild_ata_ascb(struct asd_ascb *a);
33 static void asd_unbuild_smp_ascb(struct asd_ascb *a);
34 static void asd_unbuild_ssp_ascb(struct asd_ascb *a);
35
36 static inline 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 */
47 static 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
54 static inline 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 num_sg = pci_map_sg(asd_ha->pcidev, task->scatter, task->num_scatter,
78 task->data_dir);
79 if (num_sg == 0)
80 return -ENOMEM;
81
82 if (num_sg > 3) {
83 int i;
84
85 ascb->sg_arr = asd_alloc_coherent(asd_ha,
86 num_sg*sizeof(struct sg_el),
87 gfp_flags);
88 if (!ascb->sg_arr) {
89 res = -ENOMEM;
90 goto err_unmap;
91 }
92 for (sc = task->scatter, i = 0; i < num_sg; i++, sc++) {
93 struct sg_el *sg =
94 &((struct sg_el *)ascb->sg_arr->vaddr)[i];
95 sg->bus_addr = cpu_to_le64((u64)sg_dma_address(sc));
96 sg->size = cpu_to_le32((u32)sg_dma_len(sc));
97 if (i == num_sg-1)
98 sg->flags |= ASD_SG_EL_LIST_EOL;
99 }
100
101 for (sc = task->scatter, i = 0; i < 2; i++, sc++) {
102 sg_arr[i].bus_addr =
103 cpu_to_le64((u64)sg_dma_address(sc));
104 sg_arr[i].size = cpu_to_le32((u32)sg_dma_len(sc));
105 }
106 sg_arr[1].next_sg_offs = 2 * sizeof(*sg_arr);
107 sg_arr[1].flags |= ASD_SG_EL_LIST_EOS;
108
109 memset(&sg_arr[2], 0, sizeof(*sg_arr));
110 sg_arr[2].bus_addr=cpu_to_le64((u64)ascb->sg_arr->dma_handle);
111 } else {
112 int i;
113 for (sc = task->scatter, i = 0; i < num_sg; i++, sc++) {
114 sg_arr[i].bus_addr =
115 cpu_to_le64((u64)sg_dma_address(sc));
116 sg_arr[i].size = cpu_to_le32((u32)sg_dma_len(sc));
117 }
118 sg_arr[i-1].flags |= ASD_SG_EL_LIST_EOL;
119 }
120
121 return 0;
122 err_unmap:
123 pci_unmap_sg(asd_ha->pcidev, task->scatter, task->num_scatter,
124 task->data_dir);
125 return res;
126 }
127
128 static inline void asd_unmap_scatterlist(struct asd_ascb *ascb)
129 {
130 struct asd_ha_struct *asd_ha = ascb->ha;
131 struct sas_task *task = ascb->uldd_task;
132
133 if (task->data_dir == PCI_DMA_NONE)
134 return;
135
136 if (task->num_scatter == 0) {
137 dma_addr_t dma = (dma_addr_t)
138 le64_to_cpu(ascb->scb->ssp_task.sg_element[0].bus_addr);
139 pci_unmap_single(ascb->ha->pcidev, dma, task->total_xfer_len,
140 task->data_dir);
141 return;
142 }
143
144 asd_free_coherent(asd_ha, ascb->sg_arr);
145 pci_unmap_sg(asd_ha->pcidev, task->scatter, task->num_scatter,
146 task->data_dir);
147 }
148
149 /* ---------- Task complete tasklet ---------- */
150
151 static void asd_get_response_tasklet(struct asd_ascb *ascb,
152 struct done_list_struct *dl)
153 {
154 struct asd_ha_struct *asd_ha = ascb->ha;
155 struct sas_task *task = ascb->uldd_task;
156 struct task_status_struct *ts = &task->task_status;
157 unsigned long flags;
158 struct tc_resp_sb_struct {
159 __le16 index_escb;
160 u8 len_lsb;
161 u8 flags;
162 } __attribute__ ((packed)) *resp_sb = (void *) dl->status_block;
163
164 /* int size = ((resp_sb->flags & 7) << 8) | resp_sb->len_lsb; */
165 int edb_id = ((resp_sb->flags & 0x70) >> 4)-1;
166 struct asd_ascb *escb;
167 struct asd_dma_tok *edb;
168 void *r;
169
170 spin_lock_irqsave(&asd_ha->seq.tc_index_lock, flags);
171 escb = asd_tc_index_find(&asd_ha->seq,
172 (int)le16_to_cpu(resp_sb->index_escb));
173 spin_unlock_irqrestore(&asd_ha->seq.tc_index_lock, flags);
174
175 if (!escb) {
176 ASD_DPRINTK("Uh-oh! No escb for this dl?!\n");
177 return;
178 }
179
180 ts->buf_valid_size = 0;
181 edb = asd_ha->seq.edb_arr[edb_id + escb->edb_index];
182 r = edb->vaddr;
183 if (task->task_proto == SAS_PROTO_SSP) {
184 struct ssp_response_iu *iu =
185 r + 16 + sizeof(struct ssp_frame_hdr);
186
187 ts->residual = le32_to_cpu(*(__le32 *)r);
188 ts->resp = SAS_TASK_COMPLETE;
189 if (iu->datapres == 0)
190 ts->stat = iu->status;
191 else if (iu->datapres == 1)
192 ts->stat = iu->resp_data[3];
193 else if (iu->datapres == 2) {
194 ts->stat = SAM_CHECK_COND;
195 ts->buf_valid_size = min((u32) SAS_STATUS_BUF_SIZE,
196 be32_to_cpu(iu->sense_data_len));
197 memcpy(ts->buf, iu->sense_data, ts->buf_valid_size);
198 if (iu->status != SAM_CHECK_COND) {
199 ASD_DPRINTK("device %llx sent sense data, but "
200 "stat(0x%x) is not CHECK_CONDITION"
201 "\n",
202 SAS_ADDR(task->dev->sas_addr),
203 ts->stat);
204 }
205 }
206 } else {
207 struct ata_task_resp *resp = (void *) &ts->buf[0];
208
209 ts->residual = le32_to_cpu(*(__le32 *)r);
210
211 if (SAS_STATUS_BUF_SIZE >= sizeof(*resp)) {
212 resp->frame_len = le16_to_cpu(*(__le16 *)(r+6));
213 memcpy(&resp->ending_fis[0], r+16, 24);
214 ts->buf_valid_size = sizeof(*resp);
215 }
216 }
217
218 asd_invalidate_edb(escb, edb_id);
219 }
220
221 static void asd_task_tasklet_complete(struct asd_ascb *ascb,
222 struct done_list_struct *dl)
223 {
224 struct sas_task *task = ascb->uldd_task;
225 struct task_status_struct *ts = &task->task_status;
226 unsigned long flags;
227 u8 opcode = dl->opcode;
228
229 asd_can_dequeue(ascb->ha, 1);
230
231 Again:
232 switch (opcode) {
233 case TC_NO_ERROR:
234 ts->resp = SAS_TASK_COMPLETE;
235 ts->stat = SAM_GOOD;
236 break;
237 case TC_UNDERRUN:
238 ts->resp = SAS_TASK_COMPLETE;
239 ts->stat = SAS_DATA_UNDERRUN;
240 ts->residual = le32_to_cpu(*(__le32 *)dl->status_block);
241 break;
242 case TC_OVERRUN:
243 ts->resp = SAS_TASK_COMPLETE;
244 ts->stat = SAS_DATA_OVERRUN;
245 ts->residual = 0;
246 break;
247 case TC_SSP_RESP:
248 case TC_ATA_RESP:
249 ts->resp = SAS_TASK_COMPLETE;
250 ts->stat = SAS_PROTO_RESPONSE;
251 asd_get_response_tasklet(ascb, dl);
252 break;
253 case TF_OPEN_REJECT:
254 ts->resp = SAS_TASK_UNDELIVERED;
255 ts->stat = SAS_OPEN_REJECT;
256 if (dl->status_block[1] & 2)
257 ts->open_rej_reason = 1 + dl->status_block[2];
258 else if (dl->status_block[1] & 1)
259 ts->open_rej_reason = (dl->status_block[2] >> 4)+10;
260 else
261 ts->open_rej_reason = SAS_OREJ_UNKNOWN;
262 break;
263 case TF_OPEN_TO:
264 ts->resp = SAS_TASK_UNDELIVERED;
265 ts->stat = SAS_OPEN_TO;
266 break;
267 case TF_PHY_DOWN:
268 case TU_PHY_DOWN:
269 ts->resp = SAS_TASK_UNDELIVERED;
270 ts->stat = SAS_PHY_DOWN;
271 break;
272 case TI_PHY_DOWN:
273 ts->resp = SAS_TASK_COMPLETE;
274 ts->stat = SAS_PHY_DOWN;
275 break;
276 case TI_BREAK:
277 case TI_PROTO_ERR:
278 case TI_NAK:
279 case TI_ACK_NAK_TO:
280 case TF_SMP_XMIT_RCV_ERR:
281 case TC_ATA_R_ERR_RECV:
282 ts->resp = SAS_TASK_COMPLETE;
283 ts->stat = SAS_INTERRUPTED;
284 break;
285 case TF_BREAK:
286 case TU_BREAK:
287 case TU_ACK_NAK_TO:
288 case TF_SMPRSP_TO:
289 ts->resp = SAS_TASK_UNDELIVERED;
290 ts->stat = SAS_DEV_NO_RESPONSE;
291 break;
292 case TF_NAK_RECV:
293 ts->resp = SAS_TASK_COMPLETE;
294 ts->stat = SAS_NAK_R_ERR;
295 break;
296 case TA_I_T_NEXUS_LOSS:
297 opcode = dl->status_block[0];
298 goto Again;
299 break;
300 case TF_INV_CONN_HANDLE:
301 ts->resp = SAS_TASK_UNDELIVERED;
302 ts->stat = SAS_DEVICE_UNKNOWN;
303 break;
304 case TF_REQUESTED_N_PENDING:
305 ts->resp = SAS_TASK_UNDELIVERED;
306 ts->stat = SAS_PENDING;
307 break;
308 case TC_TASK_CLEARED:
309 case TA_ON_REQ:
310 ts->resp = SAS_TASK_COMPLETE;
311 ts->stat = SAS_ABORTED_TASK;
312 break;
313
314 case TF_NO_SMP_CONN:
315 case TF_TMF_NO_CTX:
316 case TF_TMF_NO_TAG:
317 case TF_TMF_TAG_FREE:
318 case TF_TMF_TASK_DONE:
319 case TF_TMF_NO_CONN_HANDLE:
320 case TF_IRTT_TO:
321 case TF_IU_SHORT:
322 case TF_DATA_OFFS_ERR:
323 ts->resp = SAS_TASK_UNDELIVERED;
324 ts->stat = SAS_DEV_NO_RESPONSE;
325 break;
326
327 case TC_LINK_ADM_RESP:
328 case TC_CONTROL_PHY:
329 case TC_RESUME:
330 case TC_PARTIAL_SG_LIST:
331 default:
332 ASD_DPRINTK("%s: dl opcode: 0x%x?\n", __FUNCTION__, opcode);
333 break;
334 }
335
336 switch (task->task_proto) {
337 case SATA_PROTO:
338 case SAS_PROTO_STP:
339 asd_unbuild_ata_ascb(ascb);
340 break;
341 case SAS_PROTO_SMP:
342 asd_unbuild_smp_ascb(ascb);
343 break;
344 case SAS_PROTO_SSP:
345 asd_unbuild_ssp_ascb(ascb);
346 default:
347 break;
348 }
349
350 spin_lock_irqsave(&task->task_state_lock, flags);
351 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
352 task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
353 task->task_state_flags |= SAS_TASK_STATE_DONE;
354 if (unlikely((task->task_state_flags & SAS_TASK_STATE_ABORTED))) {
355 spin_unlock_irqrestore(&task->task_state_lock, flags);
356 ASD_DPRINTK("task 0x%p done with opcode 0x%x resp 0x%x "
357 "stat 0x%x but aborted by upper layer!\n",
358 task, opcode, ts->resp, ts->stat);
359 complete(&ascb->completion);
360 } else {
361 spin_unlock_irqrestore(&task->task_state_lock, flags);
362 task->lldd_task = NULL;
363 asd_ascb_free(ascb);
364 mb();
365 task->task_done(task);
366 }
367 }
368
369 /* ---------- ATA ---------- */
370
371 static int asd_build_ata_ascb(struct asd_ascb *ascb, struct sas_task *task,
372 gfp_t gfp_flags)
373 {
374 struct domain_device *dev = task->dev;
375 struct scb *scb;
376 u8 flags;
377 int res = 0;
378
379 scb = ascb->scb;
380
381 if (unlikely(task->ata_task.device_control_reg_update))
382 scb->header.opcode = CONTROL_ATA_DEV;
383 else if (dev->sata_dev.command_set == ATA_COMMAND_SET)
384 scb->header.opcode = INITIATE_ATA_TASK;
385 else
386 scb->header.opcode = INITIATE_ATAPI_TASK;
387
388 scb->ata_task.proto_conn_rate = (1 << 5); /* STP */
389 if (dev->port->oob_mode == SAS_OOB_MODE)
390 scb->ata_task.proto_conn_rate |= dev->linkrate;
391
392 scb->ata_task.total_xfer_len = cpu_to_le32(task->total_xfer_len);
393 scb->ata_task.fis = task->ata_task.fis;
394 scb->ata_task.fis.fis_type = 0x27;
395 if (likely(!task->ata_task.device_control_reg_update))
396 scb->ata_task.fis.flags |= 0x80; /* C=1: update ATA cmd reg */
397 scb->ata_task.fis.flags &= 0xF0; /* PM_PORT field shall be 0 */
398 if (dev->sata_dev.command_set == ATAPI_COMMAND_SET)
399 memcpy(scb->ata_task.atapi_packet, task->ata_task.atapi_packet,
400 16);
401 scb->ata_task.sister_scb = cpu_to_le16(0xFFFF);
402 scb->ata_task.conn_handle = cpu_to_le16(
403 (u16)(unsigned long)dev->lldd_dev);
404
405 if (likely(!task->ata_task.device_control_reg_update)) {
406 flags = 0;
407 if (task->ata_task.dma_xfer)
408 flags |= DATA_XFER_MODE_DMA;
409 if (task->ata_task.use_ncq &&
410 dev->sata_dev.command_set != ATAPI_COMMAND_SET)
411 flags |= ATA_Q_TYPE_NCQ;
412 flags |= data_dir_flags[task->data_dir];
413 scb->ata_task.ata_flags = flags;
414
415 scb->ata_task.retry_count = task->ata_task.retry_count;
416
417 flags = 0;
418 if (task->ata_task.set_affil_pol)
419 flags |= SET_AFFIL_POLICY;
420 if (task->ata_task.stp_affil_pol)
421 flags |= STP_AFFIL_POLICY;
422 scb->ata_task.flags = flags;
423 }
424 ascb->tasklet_complete = asd_task_tasklet_complete;
425
426 if (likely(!task->ata_task.device_control_reg_update))
427 res = asd_map_scatterlist(task, scb->ata_task.sg_element,
428 gfp_flags);
429
430 return res;
431 }
432
433 static void asd_unbuild_ata_ascb(struct asd_ascb *a)
434 {
435 asd_unmap_scatterlist(a);
436 }
437
438 /* ---------- SMP ---------- */
439
440 static int asd_build_smp_ascb(struct asd_ascb *ascb, struct sas_task *task,
441 gfp_t gfp_flags)
442 {
443 struct asd_ha_struct *asd_ha = ascb->ha;
444 struct domain_device *dev = task->dev;
445 struct scb *scb;
446
447 pci_map_sg(asd_ha->pcidev, &task->smp_task.smp_req, 1,
448 PCI_DMA_FROMDEVICE);
449 pci_map_sg(asd_ha->pcidev, &task->smp_task.smp_resp, 1,
450 PCI_DMA_FROMDEVICE);
451
452 scb = ascb->scb;
453
454 scb->header.opcode = INITIATE_SMP_TASK;
455
456 scb->smp_task.proto_conn_rate = dev->linkrate;
457
458 scb->smp_task.smp_req.bus_addr =
459 cpu_to_le64((u64)sg_dma_address(&task->smp_task.smp_req));
460 scb->smp_task.smp_req.size =
461 cpu_to_le32((u32)sg_dma_len(&task->smp_task.smp_req)-4);
462
463 scb->smp_task.smp_resp.bus_addr =
464 cpu_to_le64((u64)sg_dma_address(&task->smp_task.smp_resp));
465 scb->smp_task.smp_resp.size =
466 cpu_to_le32((u32)sg_dma_len(&task->smp_task.smp_resp)-4);
467
468 scb->smp_task.sister_scb = cpu_to_le16(0xFFFF);
469 scb->smp_task.conn_handle = cpu_to_le16((u16)
470 (unsigned long)dev->lldd_dev);
471
472 ascb->tasklet_complete = asd_task_tasklet_complete;
473
474 return 0;
475 }
476
477 static void asd_unbuild_smp_ascb(struct asd_ascb *a)
478 {
479 struct sas_task *task = a->uldd_task;
480
481 BUG_ON(!task);
482 pci_unmap_sg(a->ha->pcidev, &task->smp_task.smp_req, 1,
483 PCI_DMA_FROMDEVICE);
484 pci_unmap_sg(a->ha->pcidev, &task->smp_task.smp_resp, 1,
485 PCI_DMA_FROMDEVICE);
486 }
487
488 /* ---------- SSP ---------- */
489
490 static int asd_build_ssp_ascb(struct asd_ascb *ascb, struct sas_task *task,
491 gfp_t gfp_flags)
492 {
493 struct domain_device *dev = task->dev;
494 struct scb *scb;
495 int res = 0;
496
497 scb = ascb->scb;
498
499 scb->header.opcode = INITIATE_SSP_TASK;
500
501 scb->ssp_task.proto_conn_rate = (1 << 4); /* SSP */
502 scb->ssp_task.proto_conn_rate |= dev->linkrate;
503 scb->ssp_task.total_xfer_len = cpu_to_le32(task->total_xfer_len);
504 scb->ssp_task.ssp_frame.frame_type = SSP_DATA;
505 memcpy(scb->ssp_task.ssp_frame.hashed_dest_addr, dev->hashed_sas_addr,
506 HASHED_SAS_ADDR_SIZE);
507 memcpy(scb->ssp_task.ssp_frame.hashed_src_addr,
508 dev->port->ha->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
509 scb->ssp_task.ssp_frame.tptt = cpu_to_be16(0xFFFF);
510
511 memcpy(scb->ssp_task.ssp_cmd.lun, task->ssp_task.LUN, 8);
512 if (task->ssp_task.enable_first_burst)
513 scb->ssp_task.ssp_cmd.efb_prio_attr |= EFB_MASK;
514 scb->ssp_task.ssp_cmd.efb_prio_attr |= (task->ssp_task.task_prio << 3);
515 scb->ssp_task.ssp_cmd.efb_prio_attr |= (task->ssp_task.task_attr & 7);
516 memcpy(scb->ssp_task.ssp_cmd.cdb, task->ssp_task.cdb, 16);
517
518 scb->ssp_task.sister_scb = cpu_to_le16(0xFFFF);
519 scb->ssp_task.conn_handle = cpu_to_le16(
520 (u16)(unsigned long)dev->lldd_dev);
521 scb->ssp_task.data_dir = data_dir_flags[task->data_dir];
522 scb->ssp_task.retry_count = scb->ssp_task.retry_count;
523
524 ascb->tasklet_complete = asd_task_tasklet_complete;
525
526 res = asd_map_scatterlist(task, scb->ssp_task.sg_element, gfp_flags);
527
528 return res;
529 }
530
531 static void asd_unbuild_ssp_ascb(struct asd_ascb *a)
532 {
533 asd_unmap_scatterlist(a);
534 }
535
536 /* ---------- Execute Task ---------- */
537
538 static inline int asd_can_queue(struct asd_ha_struct *asd_ha, int num)
539 {
540 int res = 0;
541 unsigned long flags;
542
543 spin_lock_irqsave(&asd_ha->seq.pend_q_lock, flags);
544 if ((asd_ha->seq.can_queue - num) < 0)
545 res = -SAS_QUEUE_FULL;
546 else
547 asd_ha->seq.can_queue -= num;
548 spin_unlock_irqrestore(&asd_ha->seq.pend_q_lock, flags);
549
550 return res;
551 }
552
553 int asd_execute_task(struct sas_task *task, const int num,
554 gfp_t gfp_flags)
555 {
556 int res = 0;
557 LIST_HEAD(alist);
558 struct sas_task *t = task;
559 struct asd_ascb *ascb = NULL, *a;
560 struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha;
561 unsigned long flags;
562
563 res = asd_can_queue(asd_ha, num);
564 if (res)
565 return res;
566
567 res = num;
568 ascb = asd_ascb_alloc_list(asd_ha, &res, gfp_flags);
569 if (res) {
570 res = -ENOMEM;
571 goto out_err;
572 }
573
574 __list_add(&alist, ascb->list.prev, &ascb->list);
575 list_for_each_entry(a, &alist, list) {
576 a->uldd_task = t;
577 t->lldd_task = a;
578 t = list_entry(t->list.next, struct sas_task, list);
579 }
580 list_for_each_entry(a, &alist, list) {
581 t = a->uldd_task;
582 a->uldd_timer = 1;
583 if (t->task_proto & SAS_PROTO_STP)
584 t->task_proto = SAS_PROTO_STP;
585 switch (t->task_proto) {
586 case SATA_PROTO:
587 case SAS_PROTO_STP:
588 res = asd_build_ata_ascb(a, t, gfp_flags);
589 break;
590 case SAS_PROTO_SMP:
591 res = asd_build_smp_ascb(a, t, gfp_flags);
592 break;
593 case SAS_PROTO_SSP:
594 res = asd_build_ssp_ascb(a, t, gfp_flags);
595 break;
596 default:
597 asd_printk("unknown sas_task proto: 0x%x\n",
598 t->task_proto);
599 res = -ENOMEM;
600 break;
601 }
602 if (res)
603 goto out_err_unmap;
604
605 spin_lock_irqsave(&t->task_state_lock, flags);
606 t->task_state_flags |= SAS_TASK_AT_INITIATOR;
607 spin_unlock_irqrestore(&t->task_state_lock, flags);
608 }
609 list_del_init(&alist);
610
611 res = asd_post_ascb_list(asd_ha, ascb, num);
612 if (unlikely(res)) {
613 a = NULL;
614 __list_add(&alist, ascb->list.prev, &ascb->list);
615 goto out_err_unmap;
616 }
617
618 return 0;
619 out_err_unmap:
620 {
621 struct asd_ascb *b = a;
622 list_for_each_entry(a, &alist, list) {
623 if (a == b)
624 break;
625 t = a->uldd_task;
626 spin_lock_irqsave(&t->task_state_lock, flags);
627 t->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
628 spin_unlock_irqrestore(&t->task_state_lock, flags);
629 switch (t->task_proto) {
630 case SATA_PROTO:
631 case SAS_PROTO_STP:
632 asd_unbuild_ata_ascb(a);
633 break;
634 case SAS_PROTO_SMP:
635 asd_unbuild_smp_ascb(a);
636 break;
637 case SAS_PROTO_SSP:
638 asd_unbuild_ssp_ascb(a);
639 default:
640 break;
641 }
642 t->lldd_task = NULL;
643 }
644 }
645 list_del_init(&alist);
646 out_err:
647 if (ascb)
648 asd_ascb_free_list(ascb);
649 asd_can_dequeue(asd_ha, num);
650 return res;
651 }
Tomato firmware and modifications.