1 /* 2 * PMC-Sierra PM8001/8081/8088/8089 SAS/SATA based host adapters driver 3 * 4 * Copyright (c) 2008-2009 USI Co., Ltd. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions, and the following disclaimer, 12 * without modification. 13 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 14 * substantially similar to the "NO WARRANTY" disclaimer below 15 * ("Disclaimer") and any redistribution must be conditioned upon 16 * including a substantially similar Disclaimer requirement for further 17 * binary redistribution. 18 * 3. Neither the names of the above-listed copyright holders nor the names 19 * of any contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * Alternatively, this software may be distributed under the terms of the 23 * GNU General Public License ("GPL") version 2 as published by the Free 24 * Software Foundation. 25 * 26 * NO WARRANTY 27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 28 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 30 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 31 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 35 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 36 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGES. 38 * 39 */ 40 41 #include <linux/slab.h> 42 #include "pm8001_sas.h" 43 44 /** 45 * pm8001_find_tag - from sas task to find out tag that belongs to this task 46 * @task: the task sent to the LLDD 47 * @tag: the found tag associated with the task 48 */ 49 static int pm8001_find_tag(struct sas_task *task, u32 *tag) 50 { 51 if (task->lldd_task) { 52 struct pm8001_ccb_info *ccb; 53 ccb = task->lldd_task; 54 *tag = ccb->ccb_tag; 55 return 1; 56 } 57 return 0; 58 } 59 60 /** 61 * pm8001_tag_free - free the no more needed tag 62 * @pm8001_ha: our hba struct 63 * @tag: the found tag associated with the task 64 */ 65 void pm8001_tag_free(struct pm8001_hba_info *pm8001_ha, u32 tag) 66 { 67 void *bitmap = pm8001_ha->tags; 68 clear_bit(tag, bitmap); 69 } 70 71 /** 72 * pm8001_tag_alloc - allocate a empty tag for task used. 73 * @pm8001_ha: our hba struct 74 * @tag_out: the found empty tag . 75 */ 76 inline int pm8001_tag_alloc(struct pm8001_hba_info *pm8001_ha, u32 *tag_out) 77 { 78 unsigned int tag; 79 void *bitmap = pm8001_ha->tags; 80 unsigned long flags; 81 82 spin_lock_irqsave(&pm8001_ha->bitmap_lock, flags); 83 tag = find_first_zero_bit(bitmap, pm8001_ha->tags_num); 84 if (tag >= pm8001_ha->tags_num) { 85 spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags); 86 return -SAS_QUEUE_FULL; 87 } 88 set_bit(tag, bitmap); 89 spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags); 90 *tag_out = tag; 91 return 0; 92 } 93 94 void pm8001_tag_init(struct pm8001_hba_info *pm8001_ha) 95 { 96 int i; 97 for (i = 0; i < pm8001_ha->tags_num; ++i) 98 pm8001_tag_free(pm8001_ha, i); 99 } 100 101 /** 102 * pm8001_mem_alloc - allocate memory for pm8001. 103 * @pdev: pci device. 104 * @virt_addr: the allocated virtual address 105 * @pphys_addr_hi: the physical address high byte address. 106 * @pphys_addr_lo: the physical address low byte address. 107 * @mem_size: memory size. 108 */ 109 int pm8001_mem_alloc(struct pci_dev *pdev, void **virt_addr, 110 dma_addr_t *pphys_addr, u32 *pphys_addr_hi, 111 u32 *pphys_addr_lo, u32 mem_size, u32 align) 112 { 113 caddr_t mem_virt_alloc; 114 dma_addr_t mem_dma_handle; 115 u64 phys_align; 116 u64 align_offset = 0; 117 if (align) 118 align_offset = (dma_addr_t)align - 1; 119 mem_virt_alloc = dma_alloc_coherent(&pdev->dev, mem_size + align, 120 &mem_dma_handle, GFP_KERNEL); 121 if (!mem_virt_alloc) { 122 pr_err("pm80xx: memory allocation error\n"); 123 return -1; 124 } 125 *pphys_addr = mem_dma_handle; 126 phys_align = (*pphys_addr + align_offset) & ~align_offset; 127 *virt_addr = (void *)mem_virt_alloc + phys_align - *pphys_addr; 128 *pphys_addr_hi = upper_32_bits(phys_align); 129 *pphys_addr_lo = lower_32_bits(phys_align); 130 return 0; 131 } 132 133 /** 134 * pm8001_find_ha_by_dev - from domain device which come from sas layer to 135 * find out our hba struct. 136 * @dev: the domain device which from sas layer. 137 */ 138 static 139 struct pm8001_hba_info *pm8001_find_ha_by_dev(struct domain_device *dev) 140 { 141 struct sas_ha_struct *sha = dev->port->ha; 142 struct pm8001_hba_info *pm8001_ha = sha->lldd_ha; 143 return pm8001_ha; 144 } 145 146 /** 147 * pm8001_phy_control - this function should be registered to 148 * sas_domain_function_template to provide libsas used, note: this is just 149 * control the HBA phy rather than other expander phy if you want control 150 * other phy, you should use SMP command. 151 * @sas_phy: which phy in HBA phys. 152 * @func: the operation. 153 * @funcdata: always NULL. 154 */ 155 int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func, 156 void *funcdata) 157 { 158 int rc = 0, phy_id = sas_phy->id; 159 struct pm8001_hba_info *pm8001_ha = NULL; 160 struct sas_phy_linkrates *rates; 161 struct sas_ha_struct *sas_ha; 162 struct pm8001_phy *phy; 163 DECLARE_COMPLETION_ONSTACK(completion); 164 unsigned long flags; 165 pm8001_ha = sas_phy->ha->lldd_ha; 166 phy = &pm8001_ha->phy[phy_id]; 167 pm8001_ha->phy[phy_id].enable_completion = &completion; 168 switch (func) { 169 case PHY_FUNC_SET_LINK_RATE: 170 rates = funcdata; 171 if (rates->minimum_linkrate) { 172 pm8001_ha->phy[phy_id].minimum_linkrate = 173 rates->minimum_linkrate; 174 } 175 if (rates->maximum_linkrate) { 176 pm8001_ha->phy[phy_id].maximum_linkrate = 177 rates->maximum_linkrate; 178 } 179 if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) { 180 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id); 181 wait_for_completion(&completion); 182 } 183 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id, 184 PHY_LINK_RESET); 185 break; 186 case PHY_FUNC_HARD_RESET: 187 if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) { 188 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id); 189 wait_for_completion(&completion); 190 } 191 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id, 192 PHY_HARD_RESET); 193 break; 194 case PHY_FUNC_LINK_RESET: 195 if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) { 196 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id); 197 wait_for_completion(&completion); 198 } 199 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id, 200 PHY_LINK_RESET); 201 break; 202 case PHY_FUNC_RELEASE_SPINUP_HOLD: 203 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id, 204 PHY_LINK_RESET); 205 break; 206 case PHY_FUNC_DISABLE: 207 if (pm8001_ha->chip_id != chip_8001) { 208 if (pm8001_ha->phy[phy_id].phy_state == 209 PHY_STATE_LINK_UP_SPCV) { 210 sas_ha = pm8001_ha->sas; 211 sas_phy_disconnected(&phy->sas_phy); 212 sas_ha->notify_phy_event(&phy->sas_phy, 213 PHYE_LOSS_OF_SIGNAL); 214 phy->phy_attached = 0; 215 } 216 } else { 217 if (pm8001_ha->phy[phy_id].phy_state == 218 PHY_STATE_LINK_UP_SPC) { 219 sas_ha = pm8001_ha->sas; 220 sas_phy_disconnected(&phy->sas_phy); 221 sas_ha->notify_phy_event(&phy->sas_phy, 222 PHYE_LOSS_OF_SIGNAL); 223 phy->phy_attached = 0; 224 } 225 } 226 PM8001_CHIP_DISP->phy_stop_req(pm8001_ha, phy_id); 227 break; 228 case PHY_FUNC_GET_EVENTS: 229 spin_lock_irqsave(&pm8001_ha->lock, flags); 230 if (pm8001_ha->chip_id == chip_8001) { 231 if (-1 == pm8001_bar4_shift(pm8001_ha, 232 (phy_id < 4) ? 0x30000 : 0x40000)) { 233 spin_unlock_irqrestore(&pm8001_ha->lock, flags); 234 return -EINVAL; 235 } 236 } 237 { 238 struct sas_phy *phy = sas_phy->phy; 239 uint32_t *qp = (uint32_t *)(((char *) 240 pm8001_ha->io_mem[2].memvirtaddr) 241 + 0x1034 + (0x4000 * (phy_id & 3))); 242 243 phy->invalid_dword_count = qp[0]; 244 phy->running_disparity_error_count = qp[1]; 245 phy->loss_of_dword_sync_count = qp[3]; 246 phy->phy_reset_problem_count = qp[4]; 247 } 248 if (pm8001_ha->chip_id == chip_8001) 249 pm8001_bar4_shift(pm8001_ha, 0); 250 spin_unlock_irqrestore(&pm8001_ha->lock, flags); 251 return 0; 252 default: 253 PM8001_DEVIO_DBG(pm8001_ha, 254 pm8001_printk("func 0x%x\n", func)); 255 rc = -EOPNOTSUPP; 256 } 257 msleep(300); 258 return rc; 259 } 260 261 /** 262 * pm8001_scan_start - we should enable all HBA phys by sending the phy_start 263 * command to HBA. 264 * @shost: the scsi host data. 265 */ 266 void pm8001_scan_start(struct Scsi_Host *shost) 267 { 268 int i; 269 struct pm8001_hba_info *pm8001_ha; 270 struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost); 271 pm8001_ha = sha->lldd_ha; 272 /* SAS_RE_INITIALIZATION not available in SPCv/ve */ 273 if (pm8001_ha->chip_id == chip_8001) 274 PM8001_CHIP_DISP->sas_re_init_req(pm8001_ha); 275 for (i = 0; i < pm8001_ha->chip->n_phy; ++i) 276 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, i); 277 } 278 279 int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time) 280 { 281 struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); 282 283 /* give the phy enabling interrupt event time to come in (1s 284 * is empirically about all it takes) */ 285 if (time < HZ) 286 return 0; 287 /* Wait for discovery to finish */ 288 sas_drain_work(ha); 289 return 1; 290 } 291 292 /** 293 * pm8001_task_prep_smp - the dispatcher function, prepare data for smp task 294 * @pm8001_ha: our hba card information 295 * @ccb: the ccb which attached to smp task 296 */ 297 static int pm8001_task_prep_smp(struct pm8001_hba_info *pm8001_ha, 298 struct pm8001_ccb_info *ccb) 299 { 300 return PM8001_CHIP_DISP->smp_req(pm8001_ha, ccb); 301 } 302 303 u32 pm8001_get_ncq_tag(struct sas_task *task, u32 *tag) 304 { 305 struct ata_queued_cmd *qc = task->uldd_task; 306 if (qc) { 307 if (qc->tf.command == ATA_CMD_FPDMA_WRITE || 308 qc->tf.command == ATA_CMD_FPDMA_READ || 309 qc->tf.command == ATA_CMD_FPDMA_RECV || 310 qc->tf.command == ATA_CMD_FPDMA_SEND || 311 qc->tf.command == ATA_CMD_NCQ_NON_DATA) { 312 *tag = qc->tag; 313 return 1; 314 } 315 } 316 return 0; 317 } 318 319 /** 320 * pm8001_task_prep_ata - the dispatcher function, prepare data for sata task 321 * @pm8001_ha: our hba card information 322 * @ccb: the ccb which attached to sata task 323 */ 324 static int pm8001_task_prep_ata(struct pm8001_hba_info *pm8001_ha, 325 struct pm8001_ccb_info *ccb) 326 { 327 return PM8001_CHIP_DISP->sata_req(pm8001_ha, ccb); 328 } 329 330 /** 331 * pm8001_task_prep_ssp_tm - the dispatcher function, prepare task management data 332 * @pm8001_ha: our hba card information 333 * @ccb: the ccb which attached to TM 334 * @tmf: the task management IU 335 */ 336 static int pm8001_task_prep_ssp_tm(struct pm8001_hba_info *pm8001_ha, 337 struct pm8001_ccb_info *ccb, struct pm8001_tmf_task *tmf) 338 { 339 return PM8001_CHIP_DISP->ssp_tm_req(pm8001_ha, ccb, tmf); 340 } 341 342 /** 343 * pm8001_task_prep_ssp - the dispatcher function,prepare ssp data for ssp task 344 * @pm8001_ha: our hba card information 345 * @ccb: the ccb which attached to ssp task 346 */ 347 static int pm8001_task_prep_ssp(struct pm8001_hba_info *pm8001_ha, 348 struct pm8001_ccb_info *ccb) 349 { 350 return PM8001_CHIP_DISP->ssp_io_req(pm8001_ha, ccb); 351 } 352 353 /* Find the local port id that's attached to this device */ 354 static int sas_find_local_port_id(struct domain_device *dev) 355 { 356 struct domain_device *pdev = dev->parent; 357 358 /* Directly attached device */ 359 if (!pdev) 360 return dev->port->id; 361 while (pdev) { 362 struct domain_device *pdev_p = pdev->parent; 363 if (!pdev_p) 364 return pdev->port->id; 365 pdev = pdev->parent; 366 } 367 return 0; 368 } 369 370 #define DEV_IS_GONE(pm8001_dev) \ 371 ((!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED))) 372 /** 373 * pm8001_task_exec - queue the task(ssp, smp && ata) to the hardware. 374 * @task: the task to be execute. 375 * @gfp_flags: gfp_flags. 376 * @is_tmf: if it is task management task. 377 * @tmf: the task management IU 378 */ 379 static int pm8001_task_exec(struct sas_task *task, 380 gfp_t gfp_flags, int is_tmf, struct pm8001_tmf_task *tmf) 381 { 382 struct domain_device *dev = task->dev; 383 struct pm8001_hba_info *pm8001_ha; 384 struct pm8001_device *pm8001_dev; 385 struct pm8001_port *port = NULL; 386 struct sas_task *t = task; 387 struct pm8001_ccb_info *ccb; 388 u32 tag = 0xdeadbeef, rc = 0, n_elem = 0; 389 unsigned long flags = 0; 390 enum sas_protocol task_proto = t->task_proto; 391 392 if (!dev->port) { 393 struct task_status_struct *tsm = &t->task_status; 394 tsm->resp = SAS_TASK_UNDELIVERED; 395 tsm->stat = SAS_PHY_DOWN; 396 if (dev->dev_type != SAS_SATA_DEV) 397 t->task_done(t); 398 return 0; 399 } 400 pm8001_ha = pm8001_find_ha_by_dev(task->dev); 401 if (pm8001_ha->controller_fatal_error) { 402 struct task_status_struct *ts = &t->task_status; 403 404 ts->resp = SAS_TASK_UNDELIVERED; 405 t->task_done(t); 406 return 0; 407 } 408 PM8001_IO_DBG(pm8001_ha, pm8001_printk("pm8001_task_exec device \n ")); 409 spin_lock_irqsave(&pm8001_ha->lock, flags); 410 do { 411 dev = t->dev; 412 pm8001_dev = dev->lldd_dev; 413 port = &pm8001_ha->port[sas_find_local_port_id(dev)]; 414 if (DEV_IS_GONE(pm8001_dev) || !port->port_attached) { 415 if (sas_protocol_ata(task_proto)) { 416 struct task_status_struct *ts = &t->task_status; 417 ts->resp = SAS_TASK_UNDELIVERED; 418 ts->stat = SAS_PHY_DOWN; 419 420 spin_unlock_irqrestore(&pm8001_ha->lock, flags); 421 t->task_done(t); 422 spin_lock_irqsave(&pm8001_ha->lock, flags); 423 continue; 424 } else { 425 struct task_status_struct *ts = &t->task_status; 426 ts->resp = SAS_TASK_UNDELIVERED; 427 ts->stat = SAS_PHY_DOWN; 428 t->task_done(t); 429 continue; 430 } 431 } 432 rc = pm8001_tag_alloc(pm8001_ha, &tag); 433 if (rc) 434 goto err_out; 435 ccb = &pm8001_ha->ccb_info[tag]; 436 437 if (!sas_protocol_ata(task_proto)) { 438 if (t->num_scatter) { 439 n_elem = dma_map_sg(pm8001_ha->dev, 440 t->scatter, 441 t->num_scatter, 442 t->data_dir); 443 if (!n_elem) { 444 rc = -ENOMEM; 445 goto err_out_tag; 446 } 447 } 448 } else { 449 n_elem = t->num_scatter; 450 } 451 452 t->lldd_task = ccb; 453 ccb->n_elem = n_elem; 454 ccb->ccb_tag = tag; 455 ccb->task = t; 456 ccb->device = pm8001_dev; 457 switch (task_proto) { 458 case SAS_PROTOCOL_SMP: 459 rc = pm8001_task_prep_smp(pm8001_ha, ccb); 460 break; 461 case SAS_PROTOCOL_SSP: 462 if (is_tmf) 463 rc = pm8001_task_prep_ssp_tm(pm8001_ha, 464 ccb, tmf); 465 else 466 rc = pm8001_task_prep_ssp(pm8001_ha, ccb); 467 break; 468 case SAS_PROTOCOL_SATA: 469 case SAS_PROTOCOL_STP: 470 rc = pm8001_task_prep_ata(pm8001_ha, ccb); 471 break; 472 default: 473 dev_printk(KERN_ERR, pm8001_ha->dev, 474 "unknown sas_task proto: 0x%x\n", task_proto); 475 rc = -EINVAL; 476 break; 477 } 478 479 if (rc) { 480 PM8001_IO_DBG(pm8001_ha, 481 pm8001_printk("rc is %x\n", rc)); 482 goto err_out_tag; 483 } 484 /* TODO: select normal or high priority */ 485 spin_lock(&t->task_state_lock); 486 t->task_state_flags |= SAS_TASK_AT_INITIATOR; 487 spin_unlock(&t->task_state_lock); 488 pm8001_dev->running_req++; 489 } while (0); 490 rc = 0; 491 goto out_done; 492 493 err_out_tag: 494 pm8001_tag_free(pm8001_ha, tag); 495 err_out: 496 dev_printk(KERN_ERR, pm8001_ha->dev, "pm8001 exec failed[%d]!\n", rc); 497 if (!sas_protocol_ata(task_proto)) 498 if (n_elem) 499 dma_unmap_sg(pm8001_ha->dev, t->scatter, t->num_scatter, 500 t->data_dir); 501 out_done: 502 spin_unlock_irqrestore(&pm8001_ha->lock, flags); 503 return rc; 504 } 505 506 /** 507 * pm8001_queue_command - register for upper layer used, all IO commands sent 508 * to HBA are from this interface. 509 * @task: the task to be execute. 510 * @gfp_flags: gfp_flags 511 */ 512 int pm8001_queue_command(struct sas_task *task, gfp_t gfp_flags) 513 { 514 return pm8001_task_exec(task, gfp_flags, 0, NULL); 515 } 516 517 /** 518 * pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb. 519 * @pm8001_ha: our hba card information 520 * @ccb: the ccb which attached to ssp task 521 * @task: the task to be free. 522 * @ccb_idx: ccb index. 523 */ 524 void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha, 525 struct sas_task *task, struct pm8001_ccb_info *ccb, u32 ccb_idx) 526 { 527 if (!ccb->task) 528 return; 529 if (!sas_protocol_ata(task->task_proto)) 530 if (ccb->n_elem) 531 dma_unmap_sg(pm8001_ha->dev, task->scatter, 532 task->num_scatter, task->data_dir); 533 534 switch (task->task_proto) { 535 case SAS_PROTOCOL_SMP: 536 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_resp, 1, 537 DMA_FROM_DEVICE); 538 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1, 539 DMA_TO_DEVICE); 540 break; 541 542 case SAS_PROTOCOL_SATA: 543 case SAS_PROTOCOL_STP: 544 case SAS_PROTOCOL_SSP: 545 default: 546 /* do nothing */ 547 break; 548 } 549 task->lldd_task = NULL; 550 ccb->task = NULL; 551 ccb->ccb_tag = 0xFFFFFFFF; 552 ccb->open_retry = 0; 553 pm8001_tag_free(pm8001_ha, ccb_idx); 554 } 555 556 /** 557 * pm8001_alloc_dev - find a empty pm8001_device 558 * @pm8001_ha: our hba card information 559 */ 560 static struct pm8001_device *pm8001_alloc_dev(struct pm8001_hba_info *pm8001_ha) 561 { 562 u32 dev; 563 for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) { 564 if (pm8001_ha->devices[dev].dev_type == SAS_PHY_UNUSED) { 565 pm8001_ha->devices[dev].id = dev; 566 return &pm8001_ha->devices[dev]; 567 } 568 } 569 if (dev == PM8001_MAX_DEVICES) { 570 PM8001_FAIL_DBG(pm8001_ha, 571 pm8001_printk("max support %d devices, ignore ..\n", 572 PM8001_MAX_DEVICES)); 573 } 574 return NULL; 575 } 576 /** 577 * pm8001_find_dev - find a matching pm8001_device 578 * @pm8001_ha: our hba card information 579 * @device_id: device ID to match against 580 */ 581 struct pm8001_device *pm8001_find_dev(struct pm8001_hba_info *pm8001_ha, 582 u32 device_id) 583 { 584 u32 dev; 585 for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) { 586 if (pm8001_ha->devices[dev].device_id == device_id) 587 return &pm8001_ha->devices[dev]; 588 } 589 if (dev == PM8001_MAX_DEVICES) { 590 PM8001_FAIL_DBG(pm8001_ha, pm8001_printk("NO MATCHING " 591 "DEVICE FOUND !!!\n")); 592 } 593 return NULL; 594 } 595 596 static void pm8001_free_dev(struct pm8001_device *pm8001_dev) 597 { 598 u32 id = pm8001_dev->id; 599 memset(pm8001_dev, 0, sizeof(*pm8001_dev)); 600 pm8001_dev->id = id; 601 pm8001_dev->dev_type = SAS_PHY_UNUSED; 602 pm8001_dev->device_id = PM8001_MAX_DEVICES; 603 pm8001_dev->sas_device = NULL; 604 } 605 606 /** 607 * pm8001_dev_found_notify - libsas notify a device is found. 608 * @dev: the device structure which sas layer used. 609 * 610 * when libsas find a sas domain device, it should tell the LLDD that 611 * device is found, and then LLDD register this device to HBA firmware 612 * by the command "OPC_INB_REG_DEV", after that the HBA will assign a 613 * device ID(according to device's sas address) and returned it to LLDD. From 614 * now on, we communicate with HBA FW with the device ID which HBA assigned 615 * rather than sas address. it is the necessary step for our HBA but it is 616 * the optional for other HBA driver. 617 */ 618 static int pm8001_dev_found_notify(struct domain_device *dev) 619 { 620 unsigned long flags = 0; 621 int res = 0; 622 struct pm8001_hba_info *pm8001_ha = NULL; 623 struct domain_device *parent_dev = dev->parent; 624 struct pm8001_device *pm8001_device; 625 DECLARE_COMPLETION_ONSTACK(completion); 626 u32 flag = 0; 627 pm8001_ha = pm8001_find_ha_by_dev(dev); 628 spin_lock_irqsave(&pm8001_ha->lock, flags); 629 630 pm8001_device = pm8001_alloc_dev(pm8001_ha); 631 if (!pm8001_device) { 632 res = -1; 633 goto found_out; 634 } 635 pm8001_device->sas_device = dev; 636 dev->lldd_dev = pm8001_device; 637 pm8001_device->dev_type = dev->dev_type; 638 pm8001_device->dcompletion = &completion; 639 if (parent_dev && dev_is_expander(parent_dev->dev_type)) { 640 int phy_id; 641 struct ex_phy *phy; 642 for (phy_id = 0; phy_id < parent_dev->ex_dev.num_phys; 643 phy_id++) { 644 phy = &parent_dev->ex_dev.ex_phy[phy_id]; 645 if (SAS_ADDR(phy->attached_sas_addr) 646 == SAS_ADDR(dev->sas_addr)) { 647 pm8001_device->attached_phy = phy_id; 648 break; 649 } 650 } 651 if (phy_id == parent_dev->ex_dev.num_phys) { 652 PM8001_FAIL_DBG(pm8001_ha, 653 pm8001_printk("Error: no attached dev:%016llx" 654 " at ex:%016llx.\n", SAS_ADDR(dev->sas_addr), 655 SAS_ADDR(parent_dev->sas_addr))); 656 res = -1; 657 } 658 } else { 659 if (dev->dev_type == SAS_SATA_DEV) { 660 pm8001_device->attached_phy = 661 dev->rphy->identify.phy_identifier; 662 flag = 1; /* directly sata */ 663 } 664 } /*register this device to HBA*/ 665 PM8001_DISC_DBG(pm8001_ha, pm8001_printk("Found device\n")); 666 PM8001_CHIP_DISP->reg_dev_req(pm8001_ha, pm8001_device, flag); 667 spin_unlock_irqrestore(&pm8001_ha->lock, flags); 668 wait_for_completion(&completion); 669 if (dev->dev_type == SAS_END_DEVICE) 670 msleep(50); 671 pm8001_ha->flags = PM8001F_RUN_TIME; 672 return 0; 673 found_out: 674 spin_unlock_irqrestore(&pm8001_ha->lock, flags); 675 return res; 676 } 677 678 int pm8001_dev_found(struct domain_device *dev) 679 { 680 return pm8001_dev_found_notify(dev); 681 } 682 683 void pm8001_task_done(struct sas_task *task) 684 { 685 if (!del_timer(&task->slow_task->timer)) 686 return; 687 complete(&task->slow_task->completion); 688 } 689 690 static void pm8001_tmf_timedout(struct timer_list *t) 691 { 692 struct sas_task_slow *slow = from_timer(slow, t, timer); 693 struct sas_task *task = slow->task; 694 695 task->task_state_flags |= SAS_TASK_STATE_ABORTED; 696 complete(&task->slow_task->completion); 697 } 698 699 #define PM8001_TASK_TIMEOUT 20 700 /** 701 * pm8001_exec_internal_tmf_task - execute some task management commands. 702 * @dev: the wanted device. 703 * @tmf: which task management wanted to be take. 704 * @para_len: para_len. 705 * @parameter: ssp task parameter. 706 * 707 * when errors or exception happened, we may want to do something, for example 708 * abort the issued task which result in this execption, it is done by calling 709 * this function, note it is also with the task execute interface. 710 */ 711 static int pm8001_exec_internal_tmf_task(struct domain_device *dev, 712 void *parameter, u32 para_len, struct pm8001_tmf_task *tmf) 713 { 714 int res, retry; 715 struct sas_task *task = NULL; 716 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev); 717 struct pm8001_device *pm8001_dev = dev->lldd_dev; 718 DECLARE_COMPLETION_ONSTACK(completion_setstate); 719 720 for (retry = 0; retry < 3; retry++) { 721 task = sas_alloc_slow_task(GFP_KERNEL); 722 if (!task) 723 return -ENOMEM; 724 725 task->dev = dev; 726 task->task_proto = dev->tproto; 727 memcpy(&task->ssp_task, parameter, para_len); 728 task->task_done = pm8001_task_done; 729 task->slow_task->timer.function = pm8001_tmf_timedout; 730 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ; 731 add_timer(&task->slow_task->timer); 732 733 res = pm8001_task_exec(task, GFP_KERNEL, 1, tmf); 734 735 if (res) { 736 del_timer(&task->slow_task->timer); 737 PM8001_FAIL_DBG(pm8001_ha, 738 pm8001_printk("Executing internal task " 739 "failed\n")); 740 goto ex_err; 741 } 742 wait_for_completion(&task->slow_task->completion); 743 if (pm8001_ha->chip_id != chip_8001) { 744 pm8001_dev->setds_completion = &completion_setstate; 745 PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha, 746 pm8001_dev, 0x01); 747 wait_for_completion(&completion_setstate); 748 } 749 res = -TMF_RESP_FUNC_FAILED; 750 /* Even TMF timed out, return direct. */ 751 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { 752 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { 753 PM8001_FAIL_DBG(pm8001_ha, 754 pm8001_printk("TMF task[%x]timeout.\n", 755 tmf->tmf)); 756 goto ex_err; 757 } 758 } 759 760 if (task->task_status.resp == SAS_TASK_COMPLETE && 761 task->task_status.stat == SAM_STAT_GOOD) { 762 res = TMF_RESP_FUNC_COMPLETE; 763 break; 764 } 765 766 if (task->task_status.resp == SAS_TASK_COMPLETE && 767 task->task_status.stat == SAS_DATA_UNDERRUN) { 768 /* no error, but return the number of bytes of 769 * underrun */ 770 res = task->task_status.residual; 771 break; 772 } 773 774 if (task->task_status.resp == SAS_TASK_COMPLETE && 775 task->task_status.stat == SAS_DATA_OVERRUN) { 776 PM8001_FAIL_DBG(pm8001_ha, 777 pm8001_printk("Blocked task error.\n")); 778 res = -EMSGSIZE; 779 break; 780 } else { 781 PM8001_EH_DBG(pm8001_ha, 782 pm8001_printk(" Task to dev %016llx response:" 783 "0x%x status 0x%x\n", 784 SAS_ADDR(dev->sas_addr), 785 task->task_status.resp, 786 task->task_status.stat)); 787 sas_free_task(task); 788 task = NULL; 789 } 790 } 791 ex_err: 792 BUG_ON(retry == 3 && task != NULL); 793 sas_free_task(task); 794 return res; 795 } 796 797 static int 798 pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha, 799 struct pm8001_device *pm8001_dev, struct domain_device *dev, u32 flag, 800 u32 task_tag) 801 { 802 int res, retry; 803 u32 ccb_tag; 804 struct pm8001_ccb_info *ccb; 805 struct sas_task *task = NULL; 806 807 for (retry = 0; retry < 3; retry++) { 808 task = sas_alloc_slow_task(GFP_KERNEL); 809 if (!task) 810 return -ENOMEM; 811 812 task->dev = dev; 813 task->task_proto = dev->tproto; 814 task->task_done = pm8001_task_done; 815 task->slow_task->timer.function = pm8001_tmf_timedout; 816 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT * HZ; 817 add_timer(&task->slow_task->timer); 818 819 res = pm8001_tag_alloc(pm8001_ha, &ccb_tag); 820 if (res) 821 goto ex_err; 822 ccb = &pm8001_ha->ccb_info[ccb_tag]; 823 ccb->device = pm8001_dev; 824 ccb->ccb_tag = ccb_tag; 825 ccb->task = task; 826 ccb->n_elem = 0; 827 828 res = PM8001_CHIP_DISP->task_abort(pm8001_ha, 829 pm8001_dev, flag, task_tag, ccb_tag); 830 831 if (res) { 832 del_timer(&task->slow_task->timer); 833 PM8001_FAIL_DBG(pm8001_ha, 834 pm8001_printk("Executing internal task " 835 "failed\n")); 836 goto ex_err; 837 } 838 wait_for_completion(&task->slow_task->completion); 839 res = TMF_RESP_FUNC_FAILED; 840 /* Even TMF timed out, return direct. */ 841 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { 842 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { 843 PM8001_FAIL_DBG(pm8001_ha, 844 pm8001_printk("TMF task timeout.\n")); 845 goto ex_err; 846 } 847 } 848 849 if (task->task_status.resp == SAS_TASK_COMPLETE && 850 task->task_status.stat == SAM_STAT_GOOD) { 851 res = TMF_RESP_FUNC_COMPLETE; 852 break; 853 854 } else { 855 PM8001_EH_DBG(pm8001_ha, 856 pm8001_printk(" Task to dev %016llx response: " 857 "0x%x status 0x%x\n", 858 SAS_ADDR(dev->sas_addr), 859 task->task_status.resp, 860 task->task_status.stat)); 861 sas_free_task(task); 862 task = NULL; 863 } 864 } 865 ex_err: 866 BUG_ON(retry == 3 && task != NULL); 867 sas_free_task(task); 868 return res; 869 } 870 871 /** 872 * pm8001_dev_gone_notify - see the comments for "pm8001_dev_found_notify" 873 * @dev: the device structure which sas layer used. 874 */ 875 static void pm8001_dev_gone_notify(struct domain_device *dev) 876 { 877 unsigned long flags = 0; 878 struct pm8001_hba_info *pm8001_ha; 879 struct pm8001_device *pm8001_dev = dev->lldd_dev; 880 881 pm8001_ha = pm8001_find_ha_by_dev(dev); 882 spin_lock_irqsave(&pm8001_ha->lock, flags); 883 if (pm8001_dev) { 884 u32 device_id = pm8001_dev->device_id; 885 886 PM8001_DISC_DBG(pm8001_ha, 887 pm8001_printk("found dev[%d:%x] is gone.\n", 888 pm8001_dev->device_id, pm8001_dev->dev_type)); 889 if (pm8001_dev->running_req) { 890 spin_unlock_irqrestore(&pm8001_ha->lock, flags); 891 pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev , 892 dev, 1, 0); 893 while (pm8001_dev->running_req) 894 msleep(20); 895 spin_lock_irqsave(&pm8001_ha->lock, flags); 896 } 897 PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id); 898 pm8001_free_dev(pm8001_dev); 899 } else { 900 PM8001_DISC_DBG(pm8001_ha, 901 pm8001_printk("Found dev has gone.\n")); 902 } 903 dev->lldd_dev = NULL; 904 spin_unlock_irqrestore(&pm8001_ha->lock, flags); 905 } 906 907 void pm8001_dev_gone(struct domain_device *dev) 908 { 909 pm8001_dev_gone_notify(dev); 910 } 911 912 static int pm8001_issue_ssp_tmf(struct domain_device *dev, 913 u8 *lun, struct pm8001_tmf_task *tmf) 914 { 915 struct sas_ssp_task ssp_task; 916 if (!(dev->tproto & SAS_PROTOCOL_SSP)) 917 return TMF_RESP_FUNC_ESUPP; 918 919 strncpy((u8 *)&ssp_task.LUN, lun, 8); 920 return pm8001_exec_internal_tmf_task(dev, &ssp_task, sizeof(ssp_task), 921 tmf); 922 } 923 924 /* retry commands by ha, by task and/or by device */ 925 void pm8001_open_reject_retry( 926 struct pm8001_hba_info *pm8001_ha, 927 struct sas_task *task_to_close, 928 struct pm8001_device *device_to_close) 929 { 930 int i; 931 unsigned long flags; 932 933 if (pm8001_ha == NULL) 934 return; 935 936 spin_lock_irqsave(&pm8001_ha->lock, flags); 937 938 for (i = 0; i < PM8001_MAX_CCB; i++) { 939 struct sas_task *task; 940 struct task_status_struct *ts; 941 struct pm8001_device *pm8001_dev; 942 unsigned long flags1; 943 u32 tag; 944 struct pm8001_ccb_info *ccb = &pm8001_ha->ccb_info[i]; 945 946 pm8001_dev = ccb->device; 947 if (!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED)) 948 continue; 949 if (!device_to_close) { 950 uintptr_t d = (uintptr_t)pm8001_dev 951 - (uintptr_t)&pm8001_ha->devices; 952 if (((d % sizeof(*pm8001_dev)) != 0) 953 || ((d / sizeof(*pm8001_dev)) >= PM8001_MAX_DEVICES)) 954 continue; 955 } else if (pm8001_dev != device_to_close) 956 continue; 957 tag = ccb->ccb_tag; 958 if (!tag || (tag == 0xFFFFFFFF)) 959 continue; 960 task = ccb->task; 961 if (!task || !task->task_done) 962 continue; 963 if (task_to_close && (task != task_to_close)) 964 continue; 965 ts = &task->task_status; 966 ts->resp = SAS_TASK_COMPLETE; 967 /* Force the midlayer to retry */ 968 ts->stat = SAS_OPEN_REJECT; 969 ts->open_rej_reason = SAS_OREJ_RSVD_RETRY; 970 if (pm8001_dev) 971 pm8001_dev->running_req--; 972 spin_lock_irqsave(&task->task_state_lock, flags1); 973 task->task_state_flags &= ~SAS_TASK_STATE_PENDING; 974 task->task_state_flags &= ~SAS_TASK_AT_INITIATOR; 975 task->task_state_flags |= SAS_TASK_STATE_DONE; 976 if (unlikely((task->task_state_flags 977 & SAS_TASK_STATE_ABORTED))) { 978 spin_unlock_irqrestore(&task->task_state_lock, 979 flags1); 980 pm8001_ccb_task_free(pm8001_ha, task, ccb, tag); 981 } else { 982 spin_unlock_irqrestore(&task->task_state_lock, 983 flags1); 984 pm8001_ccb_task_free(pm8001_ha, task, ccb, tag); 985 mb();/* in order to force CPU ordering */ 986 spin_unlock_irqrestore(&pm8001_ha->lock, flags); 987 task->task_done(task); 988 spin_lock_irqsave(&pm8001_ha->lock, flags); 989 } 990 } 991 992 spin_unlock_irqrestore(&pm8001_ha->lock, flags); 993 } 994 995 /** 996 * Standard mandates link reset for ATA (type 0) and hard reset for 997 * SSP (type 1) , only for RECOVERY 998 * @dev: the device structure for the device to reset. 999 */ 1000 int pm8001_I_T_nexus_reset(struct domain_device *dev) 1001 { 1002 int rc = TMF_RESP_FUNC_FAILED; 1003 struct pm8001_device *pm8001_dev; 1004 struct pm8001_hba_info *pm8001_ha; 1005 struct sas_phy *phy; 1006 1007 if (!dev || !dev->lldd_dev) 1008 return -ENODEV; 1009 1010 pm8001_dev = dev->lldd_dev; 1011 pm8001_ha = pm8001_find_ha_by_dev(dev); 1012 phy = sas_get_local_phy(dev); 1013 1014 if (dev_is_sata(dev)) { 1015 if (scsi_is_sas_phy_local(phy)) { 1016 rc = 0; 1017 goto out; 1018 } 1019 rc = sas_phy_reset(phy, 1); 1020 if (rc) { 1021 PM8001_EH_DBG(pm8001_ha, 1022 pm8001_printk("phy reset failed for device %x\n" 1023 "with rc %d\n", pm8001_dev->device_id, rc)); 1024 rc = TMF_RESP_FUNC_FAILED; 1025 goto out; 1026 } 1027 msleep(2000); 1028 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev , 1029 dev, 1, 0); 1030 if (rc) { 1031 PM8001_EH_DBG(pm8001_ha, 1032 pm8001_printk("task abort failed %x\n" 1033 "with rc %d\n", pm8001_dev->device_id, rc)); 1034 rc = TMF_RESP_FUNC_FAILED; 1035 } 1036 } else { 1037 rc = sas_phy_reset(phy, 1); 1038 msleep(2000); 1039 } 1040 PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n", 1041 pm8001_dev->device_id, rc)); 1042 out: 1043 sas_put_local_phy(phy); 1044 return rc; 1045 } 1046 1047 /* 1048 * This function handle the IT_NEXUS_XXX event or completion 1049 * status code for SSP/SATA/SMP I/O request. 1050 */ 1051 int pm8001_I_T_nexus_event_handler(struct domain_device *dev) 1052 { 1053 int rc = TMF_RESP_FUNC_FAILED; 1054 struct pm8001_device *pm8001_dev; 1055 struct pm8001_hba_info *pm8001_ha; 1056 struct sas_phy *phy; 1057 1058 if (!dev || !dev->lldd_dev) 1059 return -1; 1060 1061 pm8001_dev = dev->lldd_dev; 1062 pm8001_ha = pm8001_find_ha_by_dev(dev); 1063 1064 PM8001_EH_DBG(pm8001_ha, 1065 pm8001_printk("I_T_Nexus handler invoked !!")); 1066 1067 phy = sas_get_local_phy(dev); 1068 1069 if (dev_is_sata(dev)) { 1070 DECLARE_COMPLETION_ONSTACK(completion_setstate); 1071 if (scsi_is_sas_phy_local(phy)) { 1072 rc = 0; 1073 goto out; 1074 } 1075 /* send internal ssp/sata/smp abort command to FW */ 1076 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev , 1077 dev, 1, 0); 1078 msleep(100); 1079 1080 /* deregister the target device */ 1081 pm8001_dev_gone_notify(dev); 1082 msleep(200); 1083 1084 /*send phy reset to hard reset target */ 1085 rc = sas_phy_reset(phy, 1); 1086 msleep(2000); 1087 pm8001_dev->setds_completion = &completion_setstate; 1088 1089 wait_for_completion(&completion_setstate); 1090 } else { 1091 /* send internal ssp/sata/smp abort command to FW */ 1092 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev , 1093 dev, 1, 0); 1094 msleep(100); 1095 1096 /* deregister the target device */ 1097 pm8001_dev_gone_notify(dev); 1098 msleep(200); 1099 1100 /*send phy reset to hard reset target */ 1101 rc = sas_phy_reset(phy, 1); 1102 msleep(2000); 1103 } 1104 PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n", 1105 pm8001_dev->device_id, rc)); 1106 out: 1107 sas_put_local_phy(phy); 1108 1109 return rc; 1110 } 1111 /* mandatory SAM-3, the task reset the specified LUN*/ 1112 int pm8001_lu_reset(struct domain_device *dev, u8 *lun) 1113 { 1114 int rc = TMF_RESP_FUNC_FAILED; 1115 struct pm8001_tmf_task tmf_task; 1116 struct pm8001_device *pm8001_dev = dev->lldd_dev; 1117 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev); 1118 DECLARE_COMPLETION_ONSTACK(completion_setstate); 1119 if (dev_is_sata(dev)) { 1120 struct sas_phy *phy = sas_get_local_phy(dev); 1121 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev , 1122 dev, 1, 0); 1123 rc = sas_phy_reset(phy, 1); 1124 sas_put_local_phy(phy); 1125 pm8001_dev->setds_completion = &completion_setstate; 1126 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha, 1127 pm8001_dev, 0x01); 1128 wait_for_completion(&completion_setstate); 1129 } else { 1130 tmf_task.tmf = TMF_LU_RESET; 1131 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task); 1132 } 1133 /* If failed, fall-through I_T_Nexus reset */ 1134 PM8001_EH_DBG(pm8001_ha, pm8001_printk("for device[%x]:rc=%d\n", 1135 pm8001_dev->device_id, rc)); 1136 return rc; 1137 } 1138 1139 /* optional SAM-3 */ 1140 int pm8001_query_task(struct sas_task *task) 1141 { 1142 u32 tag = 0xdeadbeef; 1143 int i = 0; 1144 struct scsi_lun lun; 1145 struct pm8001_tmf_task tmf_task; 1146 int rc = TMF_RESP_FUNC_FAILED; 1147 if (unlikely(!task || !task->lldd_task || !task->dev)) 1148 return rc; 1149 1150 if (task->task_proto & SAS_PROTOCOL_SSP) { 1151 struct scsi_cmnd *cmnd = task->uldd_task; 1152 struct domain_device *dev = task->dev; 1153 struct pm8001_hba_info *pm8001_ha = 1154 pm8001_find_ha_by_dev(dev); 1155 1156 int_to_scsilun(cmnd->device->lun, &lun); 1157 rc = pm8001_find_tag(task, &tag); 1158 if (rc == 0) { 1159 rc = TMF_RESP_FUNC_FAILED; 1160 return rc; 1161 } 1162 PM8001_EH_DBG(pm8001_ha, pm8001_printk("Query:[")); 1163 for (i = 0; i < 16; i++) 1164 printk(KERN_INFO "%02x ", cmnd->cmnd[i]); 1165 printk(KERN_INFO "]\n"); 1166 tmf_task.tmf = TMF_QUERY_TASK; 1167 tmf_task.tag_of_task_to_be_managed = tag; 1168 1169 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task); 1170 switch (rc) { 1171 /* The task is still in Lun, release it then */ 1172 case TMF_RESP_FUNC_SUCC: 1173 PM8001_EH_DBG(pm8001_ha, 1174 pm8001_printk("The task is still in Lun\n")); 1175 break; 1176 /* The task is not in Lun or failed, reset the phy */ 1177 case TMF_RESP_FUNC_FAILED: 1178 case TMF_RESP_FUNC_COMPLETE: 1179 PM8001_EH_DBG(pm8001_ha, 1180 pm8001_printk("The task is not in Lun or failed," 1181 " reset the phy\n")); 1182 break; 1183 } 1184 } 1185 pr_err("pm80xx: rc= %d\n", rc); 1186 return rc; 1187 } 1188 1189 /* mandatory SAM-3, still need free task/ccb info, abort the specified task */ 1190 int pm8001_abort_task(struct sas_task *task) 1191 { 1192 unsigned long flags; 1193 u32 tag; 1194 struct domain_device *dev ; 1195 struct pm8001_hba_info *pm8001_ha; 1196 struct scsi_lun lun; 1197 struct pm8001_device *pm8001_dev; 1198 struct pm8001_tmf_task tmf_task; 1199 int rc = TMF_RESP_FUNC_FAILED, ret; 1200 u32 phy_id; 1201 struct sas_task_slow slow_task; 1202 if (unlikely(!task || !task->lldd_task || !task->dev)) 1203 return TMF_RESP_FUNC_FAILED; 1204 dev = task->dev; 1205 pm8001_dev = dev->lldd_dev; 1206 pm8001_ha = pm8001_find_ha_by_dev(dev); 1207 phy_id = pm8001_dev->attached_phy; 1208 ret = pm8001_find_tag(task, &tag); 1209 if (ret == 0) { 1210 pm8001_printk("no tag for task:%p\n", task); 1211 return TMF_RESP_FUNC_FAILED; 1212 } 1213 spin_lock_irqsave(&task->task_state_lock, flags); 1214 if (task->task_state_flags & SAS_TASK_STATE_DONE) { 1215 spin_unlock_irqrestore(&task->task_state_lock, flags); 1216 return TMF_RESP_FUNC_COMPLETE; 1217 } 1218 task->task_state_flags |= SAS_TASK_STATE_ABORTED; 1219 if (task->slow_task == NULL) { 1220 init_completion(&slow_task.completion); 1221 task->slow_task = &slow_task; 1222 } 1223 spin_unlock_irqrestore(&task->task_state_lock, flags); 1224 if (task->task_proto & SAS_PROTOCOL_SSP) { 1225 struct scsi_cmnd *cmnd = task->uldd_task; 1226 int_to_scsilun(cmnd->device->lun, &lun); 1227 tmf_task.tmf = TMF_ABORT_TASK; 1228 tmf_task.tag_of_task_to_be_managed = tag; 1229 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task); 1230 pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev, 1231 pm8001_dev->sas_device, 0, tag); 1232 } else if (task->task_proto & SAS_PROTOCOL_SATA || 1233 task->task_proto & SAS_PROTOCOL_STP) { 1234 if (pm8001_ha->chip_id == chip_8006) { 1235 DECLARE_COMPLETION_ONSTACK(completion_reset); 1236 DECLARE_COMPLETION_ONSTACK(completion); 1237 struct pm8001_phy *phy = pm8001_ha->phy + phy_id; 1238 1239 /* 1. Set Device state as Recovery */ 1240 pm8001_dev->setds_completion = &completion; 1241 PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha, 1242 pm8001_dev, 0x03); 1243 wait_for_completion(&completion); 1244 1245 /* 2. Send Phy Control Hard Reset */ 1246 reinit_completion(&completion); 1247 phy->port_reset_status = PORT_RESET_TMO; 1248 phy->reset_success = false; 1249 phy->enable_completion = &completion; 1250 phy->reset_completion = &completion_reset; 1251 ret = PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id, 1252 PHY_HARD_RESET); 1253 if (ret) { 1254 phy->enable_completion = NULL; 1255 phy->reset_completion = NULL; 1256 goto out; 1257 } 1258 1259 /* In the case of the reset timeout/fail we still 1260 * abort the command at the firmware. The assumption 1261 * here is that the drive is off doing something so 1262 * that it's not processing requests, and we want to 1263 * avoid getting a completion for this and either 1264 * leaking the task in libsas or losing the race and 1265 * getting a double free. 1266 */ 1267 PM8001_MSG_DBG(pm8001_ha, 1268 pm8001_printk("Waiting for local phy ctl\n")); 1269 ret = wait_for_completion_timeout(&completion, 1270 PM8001_TASK_TIMEOUT * HZ); 1271 if (!ret || !phy->reset_success) { 1272 phy->enable_completion = NULL; 1273 phy->reset_completion = NULL; 1274 } else { 1275 /* 3. Wait for Port Reset complete or 1276 * Port reset TMO 1277 */ 1278 PM8001_MSG_DBG(pm8001_ha, 1279 pm8001_printk("Waiting for Port reset\n")); 1280 ret = wait_for_completion_timeout( 1281 &completion_reset, 1282 PM8001_TASK_TIMEOUT * HZ); 1283 if (!ret) 1284 phy->reset_completion = NULL; 1285 WARN_ON(phy->port_reset_status == 1286 PORT_RESET_TMO); 1287 if (phy->port_reset_status == PORT_RESET_TMO) { 1288 pm8001_dev_gone_notify(dev); 1289 goto out; 1290 } 1291 } 1292 1293 /* 1294 * 4. SATA Abort ALL 1295 * we wait for the task to be aborted so that the task 1296 * is removed from the ccb. on success the caller is 1297 * going to free the task. 1298 */ 1299 ret = pm8001_exec_internal_task_abort(pm8001_ha, 1300 pm8001_dev, pm8001_dev->sas_device, 1, tag); 1301 if (ret) 1302 goto out; 1303 ret = wait_for_completion_timeout( 1304 &task->slow_task->completion, 1305 PM8001_TASK_TIMEOUT * HZ); 1306 if (!ret) 1307 goto out; 1308 1309 /* 5. Set Device State as Operational */ 1310 reinit_completion(&completion); 1311 pm8001_dev->setds_completion = &completion; 1312 PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha, 1313 pm8001_dev, 0x01); 1314 wait_for_completion(&completion); 1315 } else { 1316 rc = pm8001_exec_internal_task_abort(pm8001_ha, 1317 pm8001_dev, pm8001_dev->sas_device, 0, tag); 1318 } 1319 rc = TMF_RESP_FUNC_COMPLETE; 1320 } else if (task->task_proto & SAS_PROTOCOL_SMP) { 1321 /* SMP */ 1322 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev, 1323 pm8001_dev->sas_device, 0, tag); 1324 1325 } 1326 out: 1327 spin_lock_irqsave(&task->task_state_lock, flags); 1328 if (task->slow_task == &slow_task) 1329 task->slow_task = NULL; 1330 spin_unlock_irqrestore(&task->task_state_lock, flags); 1331 if (rc != TMF_RESP_FUNC_COMPLETE) 1332 pm8001_printk("rc= %d\n", rc); 1333 return rc; 1334 } 1335 1336 int pm8001_abort_task_set(struct domain_device *dev, u8 *lun) 1337 { 1338 struct pm8001_tmf_task tmf_task; 1339 1340 tmf_task.tmf = TMF_ABORT_TASK_SET; 1341 return pm8001_issue_ssp_tmf(dev, lun, &tmf_task); 1342 } 1343 1344 int pm8001_clear_aca(struct domain_device *dev, u8 *lun) 1345 { 1346 struct pm8001_tmf_task tmf_task; 1347 1348 tmf_task.tmf = TMF_CLEAR_ACA; 1349 return pm8001_issue_ssp_tmf(dev, lun, &tmf_task); 1350 } 1351 1352 int pm8001_clear_task_set(struct domain_device *dev, u8 *lun) 1353 { 1354 struct pm8001_tmf_task tmf_task; 1355 struct pm8001_device *pm8001_dev = dev->lldd_dev; 1356 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev); 1357 1358 PM8001_EH_DBG(pm8001_ha, 1359 pm8001_printk("I_T_L_Q clear task set[%x]\n", 1360 pm8001_dev->device_id)); 1361 tmf_task.tmf = TMF_CLEAR_TASK_SET; 1362 return pm8001_issue_ssp_tmf(dev, lun, &tmf_task); 1363 } 1364 1365