1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * Aic94xx Task Management Functions 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 <linux/gfp.h> 11#include "aic94xx.h" 12#include "aic94xx_sas.h" 13#include "aic94xx_hwi.h" 14 15/* ---------- Internal enqueue ---------- */ 16 17static int asd_enqueue_internal(struct asd_ascb *ascb, 18 void (*tasklet_complete)(struct asd_ascb *, 19 struct done_list_struct *), 20 void (*timed_out)(struct timer_list *t)) 21{ 22 int res; 23 24 ascb->tasklet_complete = tasklet_complete; 25 ascb->uldd_timer = 1; 26 27 ascb->timer.function = timed_out; 28 ascb->timer.expires = jiffies + AIC94XX_SCB_TIMEOUT; 29 30 add_timer(&ascb->timer); 31 32 res = asd_post_ascb_list(ascb->ha, ascb, 1); 33 if (unlikely(res)) 34 del_timer(&ascb->timer); 35 return res; 36} 37 38/* ---------- CLEAR NEXUS ---------- */ 39 40struct tasklet_completion_status { 41 int dl_opcode; 42 int tmf_state; 43 u8 tag_valid:1; 44 __be16 tag; 45}; 46 47#define DECLARE_TCS(tcs) \ 48 struct tasklet_completion_status tcs = { \ 49 .dl_opcode = 0, \ 50 .tmf_state = 0, \ 51 .tag_valid = 0, \ 52 .tag = 0, \ 53 } 54 55 56static void asd_clear_nexus_tasklet_complete(struct asd_ascb *ascb, 57 struct done_list_struct *dl) 58{ 59 struct tasklet_completion_status *tcs = ascb->uldd_task; 60 ASD_DPRINTK("%s: here\n", __func__); 61 if (!del_timer(&ascb->timer)) { 62 ASD_DPRINTK("%s: couldn't delete timer\n", __func__); 63 return; 64 } 65 ASD_DPRINTK("%s: opcode: 0x%x\n", __func__, dl->opcode); 66 tcs->dl_opcode = dl->opcode; 67 complete(ascb->completion); 68 asd_ascb_free(ascb); 69} 70 71static void asd_clear_nexus_timedout(struct timer_list *t) 72{ 73 struct asd_ascb *ascb = from_timer(ascb, t, timer); 74 struct tasklet_completion_status *tcs = ascb->uldd_task; 75 76 ASD_DPRINTK("%s: here\n", __func__); 77 tcs->dl_opcode = TMF_RESP_FUNC_FAILED; 78 complete(ascb->completion); 79} 80 81#define CLEAR_NEXUS_PRE \ 82 struct asd_ascb *ascb; \ 83 struct scb *scb; \ 84 int res; \ 85 DECLARE_COMPLETION_ONSTACK(completion); \ 86 DECLARE_TCS(tcs); \ 87 \ 88 ASD_DPRINTK("%s: PRE\n", __func__); \ 89 res = 1; \ 90 ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL); \ 91 if (!ascb) \ 92 return -ENOMEM; \ 93 \ 94 ascb->completion = &completion; \ 95 ascb->uldd_task = &tcs; \ 96 scb = ascb->scb; \ 97 scb->header.opcode = CLEAR_NEXUS 98 99#define CLEAR_NEXUS_POST \ 100 ASD_DPRINTK("%s: POST\n", __func__); \ 101 res = asd_enqueue_internal(ascb, asd_clear_nexus_tasklet_complete, \ 102 asd_clear_nexus_timedout); \ 103 if (res) \ 104 goto out_err; \ 105 ASD_DPRINTK("%s: clear nexus posted, waiting...\n", __func__); \ 106 wait_for_completion(&completion); \ 107 res = tcs.dl_opcode; \ 108 if (res == TC_NO_ERROR) \ 109 res = TMF_RESP_FUNC_COMPLETE; \ 110 return res; \ 111out_err: \ 112 asd_ascb_free(ascb); \ 113 return res 114 115int asd_clear_nexus_ha(struct sas_ha_struct *sas_ha) 116{ 117 struct asd_ha_struct *asd_ha = sas_ha->lldd_ha; 118 119 CLEAR_NEXUS_PRE; 120 scb->clear_nexus.nexus = NEXUS_ADAPTER; 121 CLEAR_NEXUS_POST; 122} 123 124int asd_clear_nexus_port(struct asd_sas_port *port) 125{ 126 struct asd_ha_struct *asd_ha = port->ha->lldd_ha; 127 128 CLEAR_NEXUS_PRE; 129 scb->clear_nexus.nexus = NEXUS_PORT; 130 scb->clear_nexus.conn_mask = port->phy_mask; 131 CLEAR_NEXUS_POST; 132} 133 134enum clear_nexus_phase { 135 NEXUS_PHASE_PRE, 136 NEXUS_PHASE_POST, 137 NEXUS_PHASE_RESUME, 138}; 139 140static int asd_clear_nexus_I_T(struct domain_device *dev, 141 enum clear_nexus_phase phase) 142{ 143 struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha; 144 145 CLEAR_NEXUS_PRE; 146 scb->clear_nexus.nexus = NEXUS_I_T; 147 switch (phase) { 148 case NEXUS_PHASE_PRE: 149 scb->clear_nexus.flags = EXEC_Q | SUSPEND_TX; 150 break; 151 case NEXUS_PHASE_POST: 152 scb->clear_nexus.flags = SEND_Q | NOTINQ; 153 break; 154 case NEXUS_PHASE_RESUME: 155 scb->clear_nexus.flags = RESUME_TX; 156 } 157 scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long) 158 dev->lldd_dev); 159 CLEAR_NEXUS_POST; 160} 161 162int asd_I_T_nexus_reset(struct domain_device *dev) 163{ 164 int res, tmp_res, i; 165 struct sas_phy *phy = sas_get_local_phy(dev); 166 /* Standard mandates link reset for ATA (type 0) and 167 * hard reset for SSP (type 1) */ 168 int reset_type = (dev->dev_type == SAS_SATA_DEV || 169 (dev->tproto & SAS_PROTOCOL_STP)) ? 0 : 1; 170 171 asd_clear_nexus_I_T(dev, NEXUS_PHASE_PRE); 172 /* send a hard reset */ 173 ASD_DPRINTK("sending %s reset to %s\n", 174 reset_type ? "hard" : "soft", dev_name(&phy->dev)); 175 res = sas_phy_reset(phy, reset_type); 176 if (res == TMF_RESP_FUNC_COMPLETE || res == -ENODEV) { 177 /* wait for the maximum settle time */ 178 msleep(500); 179 /* clear all outstanding commands (keep nexus suspended) */ 180 asd_clear_nexus_I_T(dev, NEXUS_PHASE_POST); 181 } 182 for (i = 0 ; i < 3; i++) { 183 tmp_res = asd_clear_nexus_I_T(dev, NEXUS_PHASE_RESUME); 184 if (tmp_res == TC_RESUME) 185 goto out; 186 msleep(500); 187 } 188 189 /* This is a bit of a problem: the sequencer is still suspended 190 * and is refusing to resume. Hope it will resume on a bigger hammer 191 * or the disk is lost */ 192 dev_printk(KERN_ERR, &phy->dev, 193 "Failed to resume nexus after reset 0x%x\n", tmp_res); 194 195 res = TMF_RESP_FUNC_FAILED; 196 out: 197 sas_put_local_phy(phy); 198 return res; 199} 200 201static int asd_clear_nexus_I_T_L(struct domain_device *dev, u8 *lun) 202{ 203 struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha; 204 205 CLEAR_NEXUS_PRE; 206 scb->clear_nexus.nexus = NEXUS_I_T_L; 207 scb->clear_nexus.flags = SEND_Q | EXEC_Q | NOTINQ; 208 memcpy(scb->clear_nexus.ssp_task.lun, lun, 8); 209 scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long) 210 dev->lldd_dev); 211 CLEAR_NEXUS_POST; 212} 213 214static int asd_clear_nexus_tag(struct sas_task *task) 215{ 216 struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha; 217 struct asd_ascb *tascb = task->lldd_task; 218 219 CLEAR_NEXUS_PRE; 220 scb->clear_nexus.nexus = NEXUS_TAG; 221 memcpy(scb->clear_nexus.ssp_task.lun, task->ssp_task.LUN, 8); 222 scb->clear_nexus.ssp_task.tag = tascb->tag; 223 if (task->dev->tproto) 224 scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long) 225 task->dev->lldd_dev); 226 CLEAR_NEXUS_POST; 227} 228 229static int asd_clear_nexus_index(struct sas_task *task) 230{ 231 struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha; 232 struct asd_ascb *tascb = task->lldd_task; 233 234 CLEAR_NEXUS_PRE; 235 scb->clear_nexus.nexus = NEXUS_TRANS_CX; 236 if (task->dev->tproto) 237 scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long) 238 task->dev->lldd_dev); 239 scb->clear_nexus.index = cpu_to_le16(tascb->tc_index); 240 CLEAR_NEXUS_POST; 241} 242 243/* ---------- TMFs ---------- */ 244 245static void asd_tmf_timedout(struct timer_list *t) 246{ 247 struct asd_ascb *ascb = from_timer(ascb, t, timer); 248 struct tasklet_completion_status *tcs = ascb->uldd_task; 249 250 ASD_DPRINTK("tmf timed out\n"); 251 tcs->tmf_state = TMF_RESP_FUNC_FAILED; 252 complete(ascb->completion); 253} 254 255static int asd_get_tmf_resp_tasklet(struct asd_ascb *ascb, 256 struct done_list_struct *dl) 257{ 258 struct asd_ha_struct *asd_ha = ascb->ha; 259 unsigned long flags; 260 struct tc_resp_sb_struct { 261 __le16 index_escb; 262 u8 len_lsb; 263 u8 flags; 264 } __attribute__ ((packed)) *resp_sb = (void *) dl->status_block; 265 266 int edb_id = ((resp_sb->flags & 0x70) >> 4)-1; 267 struct asd_ascb *escb; 268 struct asd_dma_tok *edb; 269 struct ssp_frame_hdr *fh; 270 struct ssp_response_iu *ru; 271 int res = TMF_RESP_FUNC_FAILED; 272 273 ASD_DPRINTK("tmf resp tasklet\n"); 274 275 spin_lock_irqsave(&asd_ha->seq.tc_index_lock, flags); 276 escb = asd_tc_index_find(&asd_ha->seq, 277 (int)le16_to_cpu(resp_sb->index_escb)); 278 spin_unlock_irqrestore(&asd_ha->seq.tc_index_lock, flags); 279 280 if (!escb) { 281 ASD_DPRINTK("Uh-oh! No escb for this dl?!\n"); 282 return res; 283 } 284 285 edb = asd_ha->seq.edb_arr[edb_id + escb->edb_index]; 286 ascb->tag = *(__be16 *)(edb->vaddr+4); 287 fh = edb->vaddr + 16; 288 ru = edb->vaddr + 16 + sizeof(*fh); 289 res = ru->status; 290 if (ru->datapres == SAS_DATAPRES_RESPONSE_DATA) 291 res = ru->resp_data[3]; 292#if 0 293 ascb->tag = fh->tag; 294#endif 295 ascb->tag_valid = 1; 296 297 asd_invalidate_edb(escb, edb_id); 298 return res; 299} 300 301static void asd_tmf_tasklet_complete(struct asd_ascb *ascb, 302 struct done_list_struct *dl) 303{ 304 struct tasklet_completion_status *tcs; 305 306 if (!del_timer(&ascb->timer)) 307 return; 308 309 tcs = ascb->uldd_task; 310 ASD_DPRINTK("tmf tasklet complete\n"); 311 312 tcs->dl_opcode = dl->opcode; 313 314 if (dl->opcode == TC_SSP_RESP) { 315 tcs->tmf_state = asd_get_tmf_resp_tasklet(ascb, dl); 316 tcs->tag_valid = ascb->tag_valid; 317 tcs->tag = ascb->tag; 318 } 319 320 complete(ascb->completion); 321 asd_ascb_free(ascb); 322} 323 324static int asd_clear_nexus(struct sas_task *task) 325{ 326 int res = TMF_RESP_FUNC_FAILED; 327 int leftover; 328 struct asd_ascb *tascb = task->lldd_task; 329 DECLARE_COMPLETION_ONSTACK(completion); 330 unsigned long flags; 331 332 tascb->completion = &completion; 333 334 ASD_DPRINTK("task not done, clearing nexus\n"); 335 if (tascb->tag_valid) 336 res = asd_clear_nexus_tag(task); 337 else 338 res = asd_clear_nexus_index(task); 339 leftover = wait_for_completion_timeout(&completion, 340 AIC94XX_SCB_TIMEOUT); 341 tascb->completion = NULL; 342 ASD_DPRINTK("came back from clear nexus\n"); 343 spin_lock_irqsave(&task->task_state_lock, flags); 344 if (leftover < 1) 345 res = TMF_RESP_FUNC_FAILED; 346 if (task->task_state_flags & SAS_TASK_STATE_DONE) 347 res = TMF_RESP_FUNC_COMPLETE; 348 spin_unlock_irqrestore(&task->task_state_lock, flags); 349 350 return res; 351} 352 353/** 354 * asd_abort_task -- ABORT TASK TMF 355 * @task: the task to be aborted 356 * 357 * Before calling ABORT TASK the task state flags should be ORed with 358 * SAS_TASK_STATE_ABORTED (unless SAS_TASK_STATE_DONE is set) under 359 * the task_state_lock IRQ spinlock, then ABORT TASK *must* be called. 360 * 361 * Implements the ABORT TASK TMF, I_T_L_Q nexus. 362 * Returns: SAS TMF responses (see sas_task.h), 363 * -ENOMEM, 364 * -SAS_QUEUE_FULL. 365 * 366 * When ABORT TASK returns, the caller of ABORT TASK checks first the 367 * task->task_state_flags, and then the return value of ABORT TASK. 368 * 369 * If the task has task state bit SAS_TASK_STATE_DONE set, then the 370 * task was completed successfully prior to it being aborted. The 371 * caller of ABORT TASK has responsibility to call task->task_done() 372 * xor free the task, depending on their framework. The return code 373 * is TMF_RESP_FUNC_FAILED in this case. 374 * 375 * Else the SAS_TASK_STATE_DONE bit is not set, 376 * If the return code is TMF_RESP_FUNC_COMPLETE, then 377 * the task was aborted successfully. The caller of 378 * ABORT TASK has responsibility to call task->task_done() 379 * to finish the task, xor free the task depending on their 380 * framework. 381 * else 382 * the ABORT TASK returned some kind of error. The task 383 * was _not_ cancelled. Nothing can be assumed. 384 * The caller of ABORT TASK may wish to retry. 385 */ 386int asd_abort_task(struct sas_task *task) 387{ 388 struct asd_ascb *tascb = task->lldd_task; 389 struct asd_ha_struct *asd_ha = tascb->ha; 390 int res = 1; 391 unsigned long flags; 392 struct asd_ascb *ascb = NULL; 393 struct scb *scb; 394 int leftover; 395 DECLARE_TCS(tcs); 396 DECLARE_COMPLETION_ONSTACK(completion); 397 DECLARE_COMPLETION_ONSTACK(tascb_completion); 398 399 tascb->completion = &tascb_completion; 400 401 spin_lock_irqsave(&task->task_state_lock, flags); 402 if (task->task_state_flags & SAS_TASK_STATE_DONE) { 403 spin_unlock_irqrestore(&task->task_state_lock, flags); 404 res = TMF_RESP_FUNC_COMPLETE; 405 ASD_DPRINTK("%s: task 0x%p done\n", __func__, task); 406 goto out_done; 407 } 408 spin_unlock_irqrestore(&task->task_state_lock, flags); 409 410 ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL); 411 if (!ascb) 412 return -ENOMEM; 413 414 ascb->uldd_task = &tcs; 415 ascb->completion = &completion; 416 scb = ascb->scb; 417 scb->header.opcode = SCB_ABORT_TASK; 418 419 switch (task->task_proto) { 420 case SAS_PROTOCOL_SATA: 421 case SAS_PROTOCOL_STP: 422 scb->abort_task.proto_conn_rate = (1 << 5); /* STP */ 423 break; 424 case SAS_PROTOCOL_SSP: 425 scb->abort_task.proto_conn_rate = (1 << 4); /* SSP */ 426 scb->abort_task.proto_conn_rate |= task->dev->linkrate; 427 break; 428 case SAS_PROTOCOL_SMP: 429 break; 430 default: 431 break; 432 } 433 434 if (task->task_proto == SAS_PROTOCOL_SSP) { 435 scb->abort_task.ssp_frame.frame_type = SSP_TASK; 436 memcpy(scb->abort_task.ssp_frame.hashed_dest_addr, 437 task->dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE); 438 memcpy(scb->abort_task.ssp_frame.hashed_src_addr, 439 task->dev->port->ha->hashed_sas_addr, 440 HASHED_SAS_ADDR_SIZE); 441 scb->abort_task.ssp_frame.tptt = cpu_to_be16(0xFFFF); 442 443 memcpy(scb->abort_task.ssp_task.lun, task->ssp_task.LUN, 8); 444 scb->abort_task.ssp_task.tmf = TMF_ABORT_TASK; 445 scb->abort_task.ssp_task.tag = cpu_to_be16(0xFFFF); 446 } 447 448 scb->abort_task.sister_scb = cpu_to_le16(0xFFFF); 449 scb->abort_task.conn_handle = cpu_to_le16( 450 (u16)(unsigned long)task->dev->lldd_dev); 451 scb->abort_task.retry_count = 1; 452 scb->abort_task.index = cpu_to_le16((u16)tascb->tc_index); 453 scb->abort_task.itnl_to = cpu_to_le16(ITNL_TIMEOUT_CONST); 454 455 res = asd_enqueue_internal(ascb, asd_tmf_tasklet_complete, 456 asd_tmf_timedout); 457 if (res) 458 goto out_free; 459 wait_for_completion(&completion); 460 ASD_DPRINTK("tmf came back\n"); 461 462 tascb->tag = tcs.tag; 463 tascb->tag_valid = tcs.tag_valid; 464 465 spin_lock_irqsave(&task->task_state_lock, flags); 466 if (task->task_state_flags & SAS_TASK_STATE_DONE) { 467 spin_unlock_irqrestore(&task->task_state_lock, flags); 468 res = TMF_RESP_FUNC_COMPLETE; 469 ASD_DPRINTK("%s: task 0x%p done\n", __func__, task); 470 goto out_done; 471 } 472 spin_unlock_irqrestore(&task->task_state_lock, flags); 473 474 if (tcs.dl_opcode == TC_SSP_RESP) { 475 /* The task to be aborted has been sent to the device. 476 * We got a Response IU for the ABORT TASK TMF. */ 477 if (tcs.tmf_state == TMF_RESP_FUNC_COMPLETE) 478 res = asd_clear_nexus(task); 479 else 480 res = tcs.tmf_state; 481 } else if (tcs.dl_opcode == TC_NO_ERROR && 482 tcs.tmf_state == TMF_RESP_FUNC_FAILED) { 483 /* timeout */ 484 res = TMF_RESP_FUNC_FAILED; 485 } else { 486 /* In the following we assume that the managing layer 487 * will _never_ make a mistake, when issuing ABORT 488 * TASK. 489 */ 490 switch (tcs.dl_opcode) { 491 default: 492 res = asd_clear_nexus(task); 493 fallthrough; 494 case TC_NO_ERROR: 495 break; 496 /* The task hasn't been sent to the device xor 497 * we never got a (sane) Response IU for the 498 * ABORT TASK TMF. 499 */ 500 case TF_NAK_RECV: 501 res = TMF_RESP_INVALID_FRAME; 502 break; 503 case TF_TMF_TASK_DONE: /* done but not reported yet */ 504 res = TMF_RESP_FUNC_FAILED; 505 leftover = 506 wait_for_completion_timeout(&tascb_completion, 507 AIC94XX_SCB_TIMEOUT); 508 spin_lock_irqsave(&task->task_state_lock, flags); 509 if (leftover < 1) 510 res = TMF_RESP_FUNC_FAILED; 511 if (task->task_state_flags & SAS_TASK_STATE_DONE) 512 res = TMF_RESP_FUNC_COMPLETE; 513 spin_unlock_irqrestore(&task->task_state_lock, flags); 514 break; 515 case TF_TMF_NO_TAG: 516 case TF_TMF_TAG_FREE: /* the tag is in the free list */ 517 case TF_TMF_NO_CONN_HANDLE: /* no such device */ 518 res = TMF_RESP_FUNC_COMPLETE; 519 break; 520 case TF_TMF_NO_CTX: /* not in seq, or proto != SSP */ 521 res = TMF_RESP_FUNC_ESUPP; 522 break; 523 } 524 } 525 out_done: 526 tascb->completion = NULL; 527 if (res == TMF_RESP_FUNC_COMPLETE) { 528 task->lldd_task = NULL; 529 mb(); 530 asd_ascb_free(tascb); 531 } 532 ASD_DPRINTK("task 0x%p aborted, res: 0x%x\n", task, res); 533 return res; 534 535 out_free: 536 asd_ascb_free(ascb); 537 ASD_DPRINTK("task 0x%p aborted, res: 0x%x\n", task, res); 538 return res; 539} 540 541/** 542 * asd_initiate_ssp_tmf -- send a TMF to an I_T_L or I_T_L_Q nexus 543 * @dev: pointer to struct domain_device of interest 544 * @lun: pointer to u8[8] which is the LUN 545 * @tmf: the TMF to be performed (see sas_task.h or the SAS spec) 546 * @index: the transaction context of the task to be queried if QT TMF 547 * 548 * This function is used to send ABORT TASK SET, CLEAR ACA, 549 * CLEAR TASK SET, LU RESET and QUERY TASK TMFs. 550 * 551 * No SCBs should be queued to the I_T_L nexus when this SCB is 552 * pending. 553 * 554 * Returns: TMF response code (see sas_task.h or the SAS spec) 555 */ 556static int asd_initiate_ssp_tmf(struct domain_device *dev, u8 *lun, 557 int tmf, int index) 558{ 559 struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha; 560 struct asd_ascb *ascb; 561 int res = 1; 562 struct scb *scb; 563 DECLARE_COMPLETION_ONSTACK(completion); 564 DECLARE_TCS(tcs); 565 566 if (!(dev->tproto & SAS_PROTOCOL_SSP)) 567 return TMF_RESP_FUNC_ESUPP; 568 569 ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL); 570 if (!ascb) 571 return -ENOMEM; 572 573 ascb->completion = &completion; 574 ascb->uldd_task = &tcs; 575 scb = ascb->scb; 576 577 if (tmf == TMF_QUERY_TASK) 578 scb->header.opcode = QUERY_SSP_TASK; 579 else 580 scb->header.opcode = INITIATE_SSP_TMF; 581 582 scb->ssp_tmf.proto_conn_rate = (1 << 4); /* SSP */ 583 scb->ssp_tmf.proto_conn_rate |= dev->linkrate; 584 /* SSP frame header */ 585 scb->ssp_tmf.ssp_frame.frame_type = SSP_TASK; 586 memcpy(scb->ssp_tmf.ssp_frame.hashed_dest_addr, 587 dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE); 588 memcpy(scb->ssp_tmf.ssp_frame.hashed_src_addr, 589 dev->port->ha->hashed_sas_addr, HASHED_SAS_ADDR_SIZE); 590 scb->ssp_tmf.ssp_frame.tptt = cpu_to_be16(0xFFFF); 591 /* SSP Task IU */ 592 memcpy(scb->ssp_tmf.ssp_task.lun, lun, 8); 593 scb->ssp_tmf.ssp_task.tmf = tmf; 594 595 scb->ssp_tmf.sister_scb = cpu_to_le16(0xFFFF); 596 scb->ssp_tmf.conn_handle= cpu_to_le16((u16)(unsigned long) 597 dev->lldd_dev); 598 scb->ssp_tmf.retry_count = 1; 599 scb->ssp_tmf.itnl_to = cpu_to_le16(ITNL_TIMEOUT_CONST); 600 if (tmf == TMF_QUERY_TASK) 601 scb->ssp_tmf.index = cpu_to_le16(index); 602 603 res = asd_enqueue_internal(ascb, asd_tmf_tasklet_complete, 604 asd_tmf_timedout); 605 if (res) 606 goto out_err; 607 wait_for_completion(&completion); 608 609 switch (tcs.dl_opcode) { 610 case TC_NO_ERROR: 611 res = TMF_RESP_FUNC_COMPLETE; 612 break; 613 case TF_NAK_RECV: 614 res = TMF_RESP_INVALID_FRAME; 615 break; 616 case TF_TMF_TASK_DONE: 617 res = TMF_RESP_FUNC_FAILED; 618 break; 619 case TF_TMF_NO_TAG: 620 case TF_TMF_TAG_FREE: /* the tag is in the free list */ 621 case TF_TMF_NO_CONN_HANDLE: /* no such device */ 622 res = TMF_RESP_FUNC_COMPLETE; 623 break; 624 case TF_TMF_NO_CTX: /* not in seq, or proto != SSP */ 625 res = TMF_RESP_FUNC_ESUPP; 626 break; 627 default: 628 /* Allow TMF response codes to propagate upwards */ 629 res = tcs.dl_opcode; 630 break; 631 } 632 return res; 633out_err: 634 asd_ascb_free(ascb); 635 return res; 636} 637 638int asd_abort_task_set(struct domain_device *dev, u8 *lun) 639{ 640 int res = asd_initiate_ssp_tmf(dev, lun, TMF_ABORT_TASK_SET, 0); 641 642 if (res == TMF_RESP_FUNC_COMPLETE) 643 asd_clear_nexus_I_T_L(dev, lun); 644 return res; 645} 646 647int asd_clear_task_set(struct domain_device *dev, u8 *lun) 648{ 649 int res = asd_initiate_ssp_tmf(dev, lun, TMF_CLEAR_TASK_SET, 0); 650 651 if (res == TMF_RESP_FUNC_COMPLETE) 652 asd_clear_nexus_I_T_L(dev, lun); 653 return res; 654} 655 656int asd_lu_reset(struct domain_device *dev, u8 *lun) 657{ 658 int res = asd_initiate_ssp_tmf(dev, lun, TMF_LU_RESET, 0); 659 660 if (res == TMF_RESP_FUNC_COMPLETE) 661 asd_clear_nexus_I_T_L(dev, lun); 662 return res; 663} 664 665/** 666 * asd_query_task -- send a QUERY TASK TMF to an I_T_L_Q nexus 667 * @task: pointer to sas_task struct of interest 668 * 669 * Returns: TMF_RESP_FUNC_COMPLETE if the task is not in the task set, 670 * or TMF_RESP_FUNC_SUCC if the task is in the task set. 671 * 672 * Normally the management layer sets the task to aborted state, 673 * and then calls query task and then abort task. 674 */ 675int asd_query_task(struct sas_task *task) 676{ 677 struct asd_ascb *ascb = task->lldd_task; 678 int index; 679 680 if (ascb) { 681 index = ascb->tc_index; 682 return asd_initiate_ssp_tmf(task->dev, task->ssp_task.LUN, 683 TMF_QUERY_TASK, index); 684 } 685 return TMF_RESP_FUNC_COMPLETE; 686} 687