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 unsigned long 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_STATE_DONE; 353 if (unlikely((task->task_state_flags & SAS_TASK_STATE_ABORTED))) { 354 spin_unlock_irqrestore(&task->task_state_lock, flags); 355 ASD_DPRINTK("task 0x%p done with opcode 0x%x resp 0x%x " 356 "stat 0x%x but aborted by upper layer!\n", 357 task, opcode, ts->resp, ts->stat); 358 complete(&ascb->completion); 359 } else { 360 spin_unlock_irqrestore(&task->task_state_lock, flags); 361 task->lldd_task = NULL; 362 asd_ascb_free(ascb); 363 mb(); 364 task->task_done(task); 365 } 366 } 367 368 /* ---------- ATA ---------- */ 369 370 static int asd_build_ata_ascb(struct asd_ascb *ascb, struct sas_task *task, 371 unsigned long gfp_flags) 372 { 373 struct domain_device *dev = task->dev; 374 struct scb *scb; 375 u8 flags; 376 int res = 0; 377 378 scb = ascb->scb; 379 380 if (unlikely(task->ata_task.device_control_reg_update)) 381 scb->header.opcode = CONTROL_ATA_DEV; 382 else if (dev->sata_dev.command_set == ATA_COMMAND_SET) 383 scb->header.opcode = INITIATE_ATA_TASK; 384 else 385 scb->header.opcode = INITIATE_ATAPI_TASK; 386 387 scb->ata_task.proto_conn_rate = (1 << 5); /* STP */ 388 if (dev->port->oob_mode == SAS_OOB_MODE) 389 scb->ata_task.proto_conn_rate |= dev->linkrate; 390 391 scb->ata_task.total_xfer_len = cpu_to_le32(task->total_xfer_len); 392 scb->ata_task.fis = task->ata_task.fis; 393 scb->ata_task.fis.fis_type = 0x27; 394 if (likely(!task->ata_task.device_control_reg_update)) 395 scb->ata_task.fis.flags |= 0x80; /* C=1: update ATA cmd reg */ 396 scb->ata_task.fis.flags &= 0xF0; /* PM_PORT field shall be 0 */ 397 if (dev->sata_dev.command_set == ATAPI_COMMAND_SET) 398 memcpy(scb->ata_task.atapi_packet, task->ata_task.atapi_packet, 399 16); 400 scb->ata_task.sister_scb = cpu_to_le16(0xFFFF); 401 scb->ata_task.conn_handle = cpu_to_le16( 402 (u16)(unsigned long)dev->lldd_dev); 403 404 if (likely(!task->ata_task.device_control_reg_update)) { 405 flags = 0; 406 if (task->ata_task.dma_xfer) 407 flags |= DATA_XFER_MODE_DMA; 408 if (task->ata_task.use_ncq && 409 dev->sata_dev.command_set != ATAPI_COMMAND_SET) 410 flags |= ATA_Q_TYPE_NCQ; 411 flags |= data_dir_flags[task->data_dir]; 412 scb->ata_task.ata_flags = flags; 413 414 scb->ata_task.retry_count = task->ata_task.retry_count; 415 416 flags = 0; 417 if (task->ata_task.set_affil_pol) 418 flags |= SET_AFFIL_POLICY; 419 if (task->ata_task.stp_affil_pol) 420 flags |= STP_AFFIL_POLICY; 421 scb->ata_task.flags = flags; 422 } 423 ascb->tasklet_complete = asd_task_tasklet_complete; 424 425 if (likely(!task->ata_task.device_control_reg_update)) 426 res = asd_map_scatterlist(task, scb->ata_task.sg_element, 427 gfp_flags); 428 429 return res; 430 } 431 432 static void asd_unbuild_ata_ascb(struct asd_ascb *a) 433 { 434 asd_unmap_scatterlist(a); 435 } 436 437 /* ---------- SMP ---------- */ 438 439 static int asd_build_smp_ascb(struct asd_ascb *ascb, struct sas_task *task, 440 unsigned long gfp_flags) 441 { 442 struct asd_ha_struct *asd_ha = ascb->ha; 443 struct domain_device *dev = task->dev; 444 struct scb *scb; 445 446 pci_map_sg(asd_ha->pcidev, &task->smp_task.smp_req, 1, 447 PCI_DMA_FROMDEVICE); 448 pci_map_sg(asd_ha->pcidev, &task->smp_task.smp_resp, 1, 449 PCI_DMA_FROMDEVICE); 450 451 scb = ascb->scb; 452 453 scb->header.opcode = INITIATE_SMP_TASK; 454 455 scb->smp_task.proto_conn_rate = dev->linkrate; 456 457 scb->smp_task.smp_req.bus_addr = 458 cpu_to_le64((u64)sg_dma_address(&task->smp_task.smp_req)); 459 scb->smp_task.smp_req.size = 460 cpu_to_le32((u32)sg_dma_len(&task->smp_task.smp_req)-4); 461 462 scb->smp_task.smp_resp.bus_addr = 463 cpu_to_le64((u64)sg_dma_address(&task->smp_task.smp_resp)); 464 scb->smp_task.smp_resp.size = 465 cpu_to_le32((u32)sg_dma_len(&task->smp_task.smp_resp)-4); 466 467 scb->smp_task.sister_scb = cpu_to_le16(0xFFFF); 468 scb->smp_task.conn_handle = cpu_to_le16((u16) 469 (unsigned long)dev->lldd_dev); 470 471 ascb->tasklet_complete = asd_task_tasklet_complete; 472 473 return 0; 474 } 475 476 static void asd_unbuild_smp_ascb(struct asd_ascb *a) 477 { 478 struct sas_task *task = a->uldd_task; 479 480 BUG_ON(!task); 481 pci_unmap_sg(a->ha->pcidev, &task->smp_task.smp_req, 1, 482 PCI_DMA_FROMDEVICE); 483 pci_unmap_sg(a->ha->pcidev, &task->smp_task.smp_resp, 1, 484 PCI_DMA_FROMDEVICE); 485 } 486 487 /* ---------- SSP ---------- */ 488 489 static int asd_build_ssp_ascb(struct asd_ascb *ascb, struct sas_task *task, 490 unsigned long gfp_flags) 491 { 492 struct domain_device *dev = task->dev; 493 struct scb *scb; 494 int res = 0; 495 496 scb = ascb->scb; 497 498 scb->header.opcode = INITIATE_SSP_TASK; 499 500 scb->ssp_task.proto_conn_rate = (1 << 4); /* SSP */ 501 scb->ssp_task.proto_conn_rate |= dev->linkrate; 502 scb->ssp_task.total_xfer_len = cpu_to_le32(task->total_xfer_len); 503 scb->ssp_task.ssp_frame.frame_type = SSP_DATA; 504 memcpy(scb->ssp_task.ssp_frame.hashed_dest_addr, dev->hashed_sas_addr, 505 HASHED_SAS_ADDR_SIZE); 506 memcpy(scb->ssp_task.ssp_frame.hashed_src_addr, 507 dev->port->ha->hashed_sas_addr, HASHED_SAS_ADDR_SIZE); 508 scb->ssp_task.ssp_frame.tptt = cpu_to_be16(0xFFFF); 509 510 memcpy(scb->ssp_task.ssp_cmd.lun, task->ssp_task.LUN, 8); 511 if (task->ssp_task.enable_first_burst) 512 scb->ssp_task.ssp_cmd.efb_prio_attr |= EFB_MASK; 513 scb->ssp_task.ssp_cmd.efb_prio_attr |= (task->ssp_task.task_prio << 3); 514 scb->ssp_task.ssp_cmd.efb_prio_attr |= (task->ssp_task.task_attr & 7); 515 memcpy(scb->ssp_task.ssp_cmd.cdb, task->ssp_task.cdb, 16); 516 517 scb->ssp_task.sister_scb = cpu_to_le16(0xFFFF); 518 scb->ssp_task.conn_handle = cpu_to_le16( 519 (u16)(unsigned long)dev->lldd_dev); 520 scb->ssp_task.data_dir = data_dir_flags[task->data_dir]; 521 scb->ssp_task.retry_count = scb->ssp_task.retry_count; 522 523 ascb->tasklet_complete = asd_task_tasklet_complete; 524 525 res = asd_map_scatterlist(task, scb->ssp_task.sg_element, gfp_flags); 526 527 return res; 528 } 529 530 static void asd_unbuild_ssp_ascb(struct asd_ascb *a) 531 { 532 asd_unmap_scatterlist(a); 533 } 534 535 /* ---------- Execute Task ---------- */ 536 537 static inline int asd_can_queue(struct asd_ha_struct *asd_ha, int num) 538 { 539 int res = 0; 540 unsigned long flags; 541 542 spin_lock_irqsave(&asd_ha->seq.pend_q_lock, flags); 543 if ((asd_ha->seq.can_queue - num) < 0) 544 res = -SAS_QUEUE_FULL; 545 else 546 asd_ha->seq.can_queue -= num; 547 spin_unlock_irqrestore(&asd_ha->seq.pend_q_lock, flags); 548 549 return res; 550 } 551 552 int asd_execute_task(struct sas_task *task, const int num, 553 unsigned long gfp_flags) 554 { 555 int res = 0; 556 LIST_HEAD(alist); 557 struct sas_task *t = task; 558 struct asd_ascb *ascb = NULL, *a; 559 struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha; 560 561 res = asd_can_queue(asd_ha, num); 562 if (res) 563 return res; 564 565 res = num; 566 ascb = asd_ascb_alloc_list(asd_ha, &res, gfp_flags); 567 if (res) { 568 res = -ENOMEM; 569 goto out_err; 570 } 571 572 __list_add(&alist, ascb->list.prev, &ascb->list); 573 list_for_each_entry(a, &alist, list) { 574 a->uldd_task = t; 575 t->lldd_task = a; 576 t = list_entry(t->list.next, struct sas_task, list); 577 } 578 list_for_each_entry(a, &alist, list) { 579 t = a->uldd_task; 580 a->uldd_timer = 1; 581 if (t->task_proto & SAS_PROTO_STP) 582 t->task_proto = SAS_PROTO_STP; 583 switch (t->task_proto) { 584 case SATA_PROTO: 585 case SAS_PROTO_STP: 586 res = asd_build_ata_ascb(a, t, gfp_flags); 587 break; 588 case SAS_PROTO_SMP: 589 res = asd_build_smp_ascb(a, t, gfp_flags); 590 break; 591 case SAS_PROTO_SSP: 592 res = asd_build_ssp_ascb(a, t, gfp_flags); 593 break; 594 default: 595 asd_printk("unknown sas_task proto: 0x%x\n", 596 t->task_proto); 597 res = -ENOMEM; 598 break; 599 } 600 if (res) 601 goto out_err_unmap; 602 } 603 list_del_init(&alist); 604 605 res = asd_post_ascb_list(asd_ha, ascb, num); 606 if (unlikely(res)) { 607 a = NULL; 608 __list_add(&alist, ascb->list.prev, &ascb->list); 609 goto out_err_unmap; 610 } 611 612 return 0; 613 out_err_unmap: 614 { 615 struct asd_ascb *b = a; 616 list_for_each_entry(a, &alist, list) { 617 if (a == b) 618 break; 619 t = a->uldd_task; 620 switch (t->task_proto) { 621 case SATA_PROTO: 622 case SAS_PROTO_STP: 623 asd_unbuild_ata_ascb(a); 624 break; 625 case SAS_PROTO_SMP: 626 asd_unbuild_smp_ascb(a); 627 break; 628 case SAS_PROTO_SSP: 629 asd_unbuild_ssp_ascb(a); 630 default: 631 break; 632 } 633 t->lldd_task = NULL; 634 } 635 } 636 list_del_init(&alist); 637 out_err: 638 if (ascb) 639 asd_ascb_free_list(ascb); 640 asd_can_dequeue(asd_ha, num); 641 return res; 642 } 643