1 /*- 2 * BSD LICENSE 3 * 4 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. 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 * 11 * * Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * * Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <dev/isci/isci.h> 35 36 #include <cam/scsi/scsi_all.h> 37 #include <cam/scsi/scsi_message.h> 38 39 #include <dev/isci/scil/intel_sas.h> 40 41 #include <dev/isci/scil/sci_util.h> 42 43 #include <dev/isci/scil/scif_io_request.h> 44 #include <dev/isci/scil/scif_controller.h> 45 #include <dev/isci/scil/scif_remote_device.h> 46 #include <dev/isci/scil/scif_user_callback.h> 47 48 #include <dev/isci/scil/scic_io_request.h> 49 #include <dev/isci/scil/scic_user_callback.h> 50 51 /** 52 * @brief This user callback will inform the user that an IO request has 53 * completed. 54 * 55 * @param[in] controller This parameter specifies the controller on 56 * which the IO request is completing. 57 * @param[in] remote_device This parameter specifies the remote device on 58 * which this request is completing. 59 * @param[in] io_request This parameter specifies the IO request that has 60 * completed. 61 * @param[in] completion_status This parameter specifies the results of 62 * the IO request operation. SCI_IO_SUCCESS indicates 63 * successful completion. 64 * 65 * @return none 66 */ 67 void 68 scif_cb_io_request_complete(SCI_CONTROLLER_HANDLE_T scif_controller, 69 SCI_REMOTE_DEVICE_HANDLE_T remote_device, 70 SCI_IO_REQUEST_HANDLE_T io_request, SCI_IO_STATUS completion_status) 71 { 72 struct ISCI_IO_REQUEST *isci_request = 73 (struct ISCI_IO_REQUEST *)sci_object_get_association(io_request); 74 75 scif_controller_complete_io(scif_controller, remote_device, io_request); 76 isci_io_request_complete(scif_controller, remote_device, isci_request, 77 completion_status); 78 } 79 80 void 81 isci_io_request_complete(SCI_CONTROLLER_HANDLE_T scif_controller, 82 SCI_REMOTE_DEVICE_HANDLE_T remote_device, 83 struct ISCI_IO_REQUEST *isci_request, SCI_IO_STATUS completion_status) 84 { 85 struct ISCI_CONTROLLER *isci_controller; 86 struct ISCI_REMOTE_DEVICE *isci_remote_device; 87 union ccb *ccb; 88 BOOL complete_ccb; 89 90 complete_ccb = TRUE; 91 isci_controller = (struct ISCI_CONTROLLER *) sci_object_get_association(scif_controller); 92 isci_remote_device = 93 (struct ISCI_REMOTE_DEVICE *) sci_object_get_association(remote_device); 94 95 ccb = isci_request->ccb; 96 97 ccb->ccb_h.status &= ~CAM_STATUS_MASK; 98 99 switch (completion_status) { 100 case SCI_IO_SUCCESS: 101 case SCI_IO_SUCCESS_COMPLETE_BEFORE_START: 102 #if __FreeBSD_version >= 900026 103 if (ccb->ccb_h.func_code == XPT_SMP_IO) { 104 void *smp_response = 105 scif_io_request_get_response_iu_address( 106 isci_request->sci_object); 107 108 memcpy(ccb->smpio.smp_response, smp_response, 109 ccb->smpio.smp_response_len); 110 } 111 #endif 112 ccb->ccb_h.status |= CAM_REQ_CMP; 113 break; 114 115 case SCI_IO_SUCCESS_IO_DONE_EARLY: 116 ccb->ccb_h.status |= CAM_REQ_CMP; 117 ccb->csio.resid = ccb->csio.dxfer_len - 118 scif_io_request_get_number_of_bytes_transferred( 119 isci_request->sci_object); 120 break; 121 122 case SCI_IO_FAILURE_RESPONSE_VALID: 123 { 124 SCI_SSP_RESPONSE_IU_T * response_buffer; 125 uint32_t sense_length; 126 int error_code, sense_key, asc, ascq; 127 struct ccb_scsiio *csio = &ccb->csio; 128 129 response_buffer = (SCI_SSP_RESPONSE_IU_T *) 130 scif_io_request_get_response_iu_address( 131 isci_request->sci_object); 132 133 sense_length = sci_ssp_get_sense_data_length( 134 response_buffer->sense_data_length); 135 136 sense_length = MIN(csio->sense_len, sense_length); 137 138 memcpy(&csio->sense_data, response_buffer->data, sense_length); 139 140 csio->sense_resid = csio->sense_len - sense_length; 141 csio->scsi_status = response_buffer->status; 142 ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR; 143 ccb->ccb_h.status |= CAM_AUTOSNS_VALID; 144 scsi_extract_sense( &csio->sense_data, &error_code, &sense_key, 145 &asc, &ascq ); 146 isci_log_message(1, "ISCI", 147 "isci: bus=%x target=%x lun=%x cdb[0]=%x status=%x key=%x asc=%x ascq=%x\n", 148 ccb->ccb_h.path_id, ccb->ccb_h.target_id, 149 ccb->ccb_h.target_lun, csio->cdb_io.cdb_bytes[0], 150 csio->scsi_status, sense_key, asc, ascq); 151 break; 152 } 153 154 case SCI_IO_FAILURE_REMOTE_DEVICE_RESET_REQUIRED: 155 isci_remote_device_reset(isci_remote_device, NULL); 156 157 /* drop through */ 158 case SCI_IO_FAILURE_TERMINATED: 159 ccb->ccb_h.status |= CAM_REQ_TERMIO; 160 isci_log_message(1, "ISCI", 161 "isci: bus=%x target=%x lun=%x cdb[0]=%x terminated\n", 162 ccb->ccb_h.path_id, ccb->ccb_h.target_id, 163 ccb->ccb_h.target_lun, ccb->csio.cdb_io.cdb_bytes[0]); 164 break; 165 166 case SCI_IO_FAILURE_INVALID_STATE: 167 case SCI_IO_FAILURE_INSUFFICIENT_RESOURCES: 168 complete_ccb = FALSE; 169 break; 170 171 case SCI_IO_FAILURE_INVALID_REMOTE_DEVICE: 172 ccb->ccb_h.status |= CAM_DEV_NOT_THERE; 173 break; 174 175 case SCI_IO_FAILURE_NO_NCQ_TAG_AVAILABLE: 176 { 177 struct ccb_relsim ccb_relsim; 178 struct cam_path *path; 179 180 xpt_create_path(&path, NULL, 181 cam_sim_path(isci_controller->sim), 182 isci_remote_device->index, 0); 183 184 xpt_setup_ccb(&ccb_relsim.ccb_h, path, 5); 185 ccb_relsim.ccb_h.func_code = XPT_REL_SIMQ; 186 ccb_relsim.ccb_h.flags = CAM_DEV_QFREEZE; 187 ccb_relsim.release_flags = RELSIM_ADJUST_OPENINGS; 188 ccb_relsim.openings = 189 scif_remote_device_get_max_queue_depth(remote_device); 190 xpt_action((union ccb *)&ccb_relsim); 191 xpt_free_path(path); 192 complete_ccb = FALSE; 193 } 194 break; 195 196 case SCI_IO_FAILURE: 197 case SCI_IO_FAILURE_REQUIRES_SCSI_ABORT: 198 case SCI_IO_FAILURE_UNSUPPORTED_PROTOCOL: 199 case SCI_IO_FAILURE_PROTOCOL_VIOLATION: 200 case SCI_IO_FAILURE_INVALID_PARAMETER_VALUE: 201 case SCI_IO_FAILURE_CONTROLLER_SPECIFIC_ERR: 202 default: 203 isci_log_message(1, "ISCI", 204 "isci: bus=%x target=%x lun=%x cdb[0]=%x completion status=%x\n", 205 ccb->ccb_h.path_id, ccb->ccb_h.target_id, 206 ccb->ccb_h.target_lun, ccb->csio.cdb_io.cdb_bytes[0], 207 completion_status); 208 ccb->ccb_h.status |= CAM_REQ_CMP_ERR; 209 break; 210 } 211 212 callout_stop(&isci_request->parent.timer); 213 bus_dmamap_sync(isci_request->parent.dma_tag, 214 isci_request->parent.dma_map, 215 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 216 217 bus_dmamap_unload(isci_request->parent.dma_tag, 218 isci_request->parent.dma_map); 219 220 isci_request->ccb = NULL; 221 222 sci_pool_put(isci_controller->request_pool, 223 (struct ISCI_REQUEST *)isci_request); 224 225 if (complete_ccb) { 226 if ((ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 227 /* ccb will be completed with some type of non-success 228 * status. So temporarily freeze the queue until the 229 * upper layers can act on the status. The 230 * CAM_DEV_QFRZN flag will then release the queue 231 * after the status is acted upon. 232 */ 233 ccb->ccb_h.status |= CAM_DEV_QFRZN; 234 xpt_freeze_devq(ccb->ccb_h.path, 1); 235 } 236 237 if (ccb->ccb_h.status & CAM_SIM_QUEUED) { 238 239 KASSERT(ccb == isci_remote_device->queued_ccb_in_progress, 240 ("multiple internally queued ccbs in flight")); 241 242 TAILQ_REMOVE(&isci_remote_device->queued_ccbs, 243 &ccb->ccb_h, sim_links.tqe); 244 ccb->ccb_h.status &= ~CAM_SIM_QUEUED; 245 246 /* 247 * This CCB that was in the queue was completed, so 248 * set the in_progress pointer to NULL denoting that 249 * we can retry another CCB from the queue. We only 250 * allow one CCB at a time from the queue to be 251 * in progress so that we can effectively maintain 252 * ordering. 253 */ 254 isci_remote_device->queued_ccb_in_progress = NULL; 255 } 256 257 if (isci_remote_device->frozen_lun_mask != 0) { 258 isci_remote_device_release_device_queue(isci_remote_device); 259 } 260 261 xpt_done(ccb); 262 263 if (isci_controller->is_frozen == TRUE) { 264 isci_controller->is_frozen = FALSE; 265 xpt_release_simq(isci_controller->sim, TRUE); 266 } 267 } else { 268 isci_remote_device_freeze_lun_queue(isci_remote_device, 269 ccb->ccb_h.target_lun); 270 271 if (ccb->ccb_h.status & CAM_SIM_QUEUED) { 272 273 KASSERT(ccb == isci_remote_device->queued_ccb_in_progress, 274 ("multiple internally queued ccbs in flight")); 275 276 /* 277 * Do nothing, CCB is already on the device's queue. 278 * We leave it on the queue, to be retried again 279 * next time a CCB on this device completes, or we 280 * get a ready notification for this device. 281 */ 282 isci_log_message(1, "ISCI", "already queued %p %x\n", 283 ccb, ccb->csio.cdb_io.cdb_bytes[0]); 284 285 isci_remote_device->queued_ccb_in_progress = NULL; 286 287 } else { 288 isci_log_message(1, "ISCI", "queue %p %x\n", ccb, 289 ccb->csio.cdb_io.cdb_bytes[0]); 290 ccb->ccb_h.status |= CAM_SIM_QUEUED; 291 292 TAILQ_INSERT_TAIL(&isci_remote_device->queued_ccbs, 293 &ccb->ccb_h, sim_links.tqe); 294 } 295 } 296 } 297 298 /** 299 * @brief This callback method asks the user to provide the physical 300 * address for the supplied virtual address when building an 301 * io request object. 302 * 303 * @param[in] controller This parameter is the core controller object 304 * handle. 305 * @param[in] io_request This parameter is the io request object handle 306 * for which the physical address is being requested. 307 * @param[in] virtual_address This paramter is the virtual address which 308 * is to be returned as a physical address. 309 * @param[out] physical_address The physical address for the supplied virtual 310 * address. 311 * 312 * @return None. 313 */ 314 void 315 scic_cb_io_request_get_physical_address(SCI_CONTROLLER_HANDLE_T controller, 316 SCI_IO_REQUEST_HANDLE_T io_request, void *virtual_address, 317 SCI_PHYSICAL_ADDRESS *physical_address) 318 { 319 SCI_IO_REQUEST_HANDLE_T scif_request = 320 sci_object_get_association(io_request); 321 struct ISCI_REQUEST *isci_request = 322 sci_object_get_association(scif_request); 323 324 if(isci_request != NULL) { 325 /* isci_request is not NULL, meaning this is a request initiated 326 * by CAM or the isci layer (i.e. device reset for I/O 327 * timeout). Therefore we can calculate the physical address 328 * based on the address we stored in the struct ISCI_REQUEST 329 * object. 330 */ 331 *physical_address = isci_request->physical_address + 332 (uintptr_t)virtual_address - 333 (uintptr_t)isci_request; 334 } else { 335 /* isci_request is NULL, meaning this is a request generated 336 * internally by SCIL (i.e. for SMP requests or NCQ error 337 * recovery). Therefore we calculate the physical address 338 * based on the controller's uncached controller memory buffer, 339 * since we know that this is what SCIL uses for internal 340 * framework requests. 341 */ 342 SCI_CONTROLLER_HANDLE_T scif_controller = 343 (SCI_CONTROLLER_HANDLE_T) sci_object_get_association(controller); 344 struct ISCI_CONTROLLER *isci_controller = 345 (struct ISCI_CONTROLLER *)sci_object_get_association(scif_controller); 346 U64 virt_addr_offset = (uintptr_t)virtual_address - 347 (U64)isci_controller->uncached_controller_memory.virtual_address; 348 349 *physical_address = 350 isci_controller->uncached_controller_memory.physical_address 351 + virt_addr_offset; 352 } 353 } 354 355 /** 356 * @brief This callback method asks the user to provide the address for 357 * the command descriptor block (CDB) associated with this IO request. 358 * 359 * @param[in] scif_user_io_request This parameter points to the user's 360 * IO request object. It is a cookie that allows the user to 361 * provide the necessary information for this callback. 362 * 363 * @return This method returns the virtual address of the CDB. 364 */ 365 void * 366 scif_cb_io_request_get_cdb_address(void * scif_user_io_request) 367 { 368 struct ISCI_IO_REQUEST *isci_request = 369 (struct ISCI_IO_REQUEST *)scif_user_io_request; 370 371 return (isci_request->ccb->csio.cdb_io.cdb_bytes); 372 } 373 374 /** 375 * @brief This callback method asks the user to provide the length of 376 * the command descriptor block (CDB) associated with this IO request. 377 * 378 * @param[in] scif_user_io_request This parameter points to the user's 379 * IO request object. It is a cookie that allows the user to 380 * provide the necessary information for this callback. 381 * 382 * @return This method returns the length of the CDB. 383 */ 384 uint32_t 385 scif_cb_io_request_get_cdb_length(void * scif_user_io_request) 386 { 387 struct ISCI_IO_REQUEST *isci_request = 388 (struct ISCI_IO_REQUEST *)scif_user_io_request; 389 390 return (isci_request->ccb->csio.cdb_len); 391 } 392 393 /** 394 * @brief This callback method asks the user to provide the Logical Unit (LUN) 395 * associated with this IO request. 396 * 397 * @note The contents of the value returned from this callback are defined 398 * by the protocol standard (e.g. T10 SAS specification). Please 399 * refer to the transport command information unit description 400 * in the associated standard. 401 * 402 * @param[in] scif_user_io_request This parameter points to the user's 403 * IO request object. It is a cookie that allows the user to 404 * provide the necessary information for this callback. 405 * 406 * @return This method returns the LUN associated with this request. 407 */ 408 uint32_t 409 scif_cb_io_request_get_lun(void * scif_user_io_request) 410 { 411 struct ISCI_IO_REQUEST *isci_request = 412 (struct ISCI_IO_REQUEST *)scif_user_io_request; 413 414 return (isci_request->ccb->ccb_h.target_lun); 415 } 416 417 /** 418 * @brief This callback method asks the user to provide the task attribute 419 * associated with this IO request. 420 * 421 * @note The contents of the value returned from this callback are defined 422 * by the protocol standard (e.g. T10 SAS specification). Please 423 * refer to the transport command information unit description 424 * in the associated standard. 425 * 426 * @param[in] scif_user_io_request This parameter points to the user's 427 * IO request object. It is a cookie that allows the user to 428 * provide the necessary information for this callback. 429 * 430 * @return This method returns the task attribute associated with this 431 * IO request. 432 */ 433 uint32_t 434 scif_cb_io_request_get_task_attribute(void * scif_user_io_request) 435 { 436 struct ISCI_IO_REQUEST *isci_request = 437 (struct ISCI_IO_REQUEST *)scif_user_io_request; 438 uint32_t task_attribute; 439 440 if((isci_request->ccb->ccb_h.flags & CAM_TAG_ACTION_VALID) != 0) 441 switch(isci_request->ccb->csio.tag_action) { 442 case MSG_HEAD_OF_Q_TAG: 443 task_attribute = SCI_SAS_HEAD_OF_QUEUE_ATTRIBUTE; 444 break; 445 446 case MSG_ORDERED_Q_TAG: 447 task_attribute = SCI_SAS_ORDERED_ATTRIBUTE; 448 break; 449 450 case MSG_ACA_TASK: 451 task_attribute = SCI_SAS_ACA_ATTRIBUTE; 452 break; 453 454 default: 455 task_attribute = SCI_SAS_SIMPLE_ATTRIBUTE; 456 break; 457 } 458 else 459 task_attribute = SCI_SAS_SIMPLE_ATTRIBUTE; 460 461 return (task_attribute); 462 } 463 464 /** 465 * @brief This callback method asks the user to provide the command priority 466 * associated with this IO request. 467 * 468 * @note The contents of the value returned from this callback are defined 469 * by the protocol standard (e.g. T10 SAS specification). Please 470 * refer to the transport command information unit description 471 * in the associated standard. 472 * 473 * @param[in] scif_user_io_request This parameter points to the user's 474 * IO request object. It is a cookie that allows the user to 475 * provide the necessary information for this callback. 476 * 477 * @return This method returns the command priority associated with this 478 * IO request. 479 */ 480 uint32_t 481 scif_cb_io_request_get_command_priority(void * scif_user_io_request) 482 { 483 return (0); 484 } 485 486 /** 487 * @brief This method simply returns the virtual address associated 488 * with the scsi_io and byte_offset supplied parameters. 489 * 490 * @note This callback is not utilized in the fast path. The expectation 491 * is that this method is utilized for items such as SCSI to ATA 492 * translation for commands like INQUIRY, READ CAPACITY, etc. 493 * 494 * @param[in] scif_user_io_request This parameter points to the user's 495 * IO request object. It is a cookie that allows the user to 496 * provide the necessary information for this callback. 497 * @param[in] byte_offset This parameter specifies the offset into the data 498 * buffers pointed to by the SGL. The byte offset starts at 0 499 * and continues until the last byte pointed to be the last SGL 500 * element. 501 * 502 * @return A virtual address pointer to the location specified by the 503 * parameters. 504 */ 505 uint8_t * 506 scif_cb_io_request_get_virtual_address_from_sgl(void * scif_user_io_request, 507 uint32_t byte_offset) 508 { 509 struct ISCI_IO_REQUEST *isci_request = 510 (struct ISCI_IO_REQUEST *)scif_user_io_request; 511 512 return (isci_request->ccb->csio.data_ptr + byte_offset); 513 } 514 515 /** 516 * @brief This callback method asks the user to provide the number of 517 * bytes to be transfered as part of this request. 518 * 519 * @param[in] scif_user_io_request This parameter points to the user's 520 * IO request object. It is a cookie that allows the user to 521 * provide the necessary information for this callback. 522 * 523 * @return This method returns the number of payload data bytes to be 524 * transfered for this IO request. 525 */ 526 uint32_t 527 scif_cb_io_request_get_transfer_length(void * scif_user_io_request) 528 { 529 struct ISCI_IO_REQUEST *isci_request = 530 (struct ISCI_IO_REQUEST *)scif_user_io_request; 531 532 return (isci_request->ccb->csio.dxfer_len); 533 534 } 535 536 /** 537 * @brief This callback method asks the user to provide the data direction 538 * for this request. 539 * 540 * @param[in] scif_user_io_request This parameter points to the user's 541 * IO request object. It is a cookie that allows the user to 542 * provide the necessary information for this callback. 543 * 544 * @return This method returns the value of SCI_IO_REQUEST_DATA_OUT, 545 * SCI_IO_REQUEST_DATA_IN, or SCI_IO_REQUEST_NO_DATA. 546 */ 547 SCI_IO_REQUEST_DATA_DIRECTION 548 scif_cb_io_request_get_data_direction(void * scif_user_io_request) 549 { 550 struct ISCI_IO_REQUEST *isci_request = 551 (struct ISCI_IO_REQUEST *)scif_user_io_request; 552 553 switch (isci_request->ccb->ccb_h.flags & CAM_DIR_MASK) { 554 case CAM_DIR_IN: 555 return (SCI_IO_REQUEST_DATA_IN); 556 case CAM_DIR_OUT: 557 return (SCI_IO_REQUEST_DATA_OUT); 558 default: 559 return (SCI_IO_REQUEST_NO_DATA); 560 } 561 } 562 563 /** 564 * @brief This callback method asks the user to provide the address 565 * to where the next Scatter-Gather Element is located. 566 * 567 * Details regarding usage: 568 * - Regarding the first SGE: the user should initialize an index, 569 * or a pointer, prior to construction of the request that will 570 * reference the very first scatter-gather element. This is 571 * important since this method is called for every scatter-gather 572 * element, including the first element. 573 * - Regarding the last SGE: the user should return NULL from this 574 * method when this method is called and the SGL has exhausted 575 * all elements. 576 * 577 * @param[in] scif_user_io_request This parameter points to the user's 578 * IO request object. It is a cookie that allows the user to 579 * provide the necessary information for this callback. 580 * @param[in] current_sge_address This parameter specifies the address for 581 * the current SGE (i.e. the one that has just processed). 582 * @param[out] next_sge An address specifying the location for the next scatter 583 * gather element to be processed. 584 * 585 * @return None. 586 */ 587 void 588 scif_cb_io_request_get_next_sge(void * scif_user_io_request, 589 void * current_sge_address, void ** next_sge) 590 { 591 struct ISCI_IO_REQUEST *isci_request = 592 (struct ISCI_IO_REQUEST *)scif_user_io_request; 593 594 if (isci_request->current_sge_index == isci_request->num_segments) 595 *next_sge = NULL; 596 else { 597 bus_dma_segment_t *sge = 598 &isci_request->sge[isci_request->current_sge_index]; 599 600 isci_request->current_sge_index++; 601 *next_sge = sge; 602 } 603 } 604 605 /** 606 * @brief This callback method asks the user to provide the contents of the 607 * "address" field in the Scatter-Gather Element. 608 * 609 * @param[in] scif_user_io_request This parameter points to the user's 610 * IO request object. It is a cookie that allows the user to 611 * provide the necessary information for this callback. 612 * @param[in] sge_address This parameter specifies the address for the 613 * SGE from which to retrieve the address field. 614 * 615 * @return A physical address specifying the contents of the SGE's address 616 * field. 617 */ 618 SCI_PHYSICAL_ADDRESS 619 scif_cb_sge_get_address_field(void *scif_user_io_request, void *sge_address) 620 { 621 bus_dma_segment_t *sge = (bus_dma_segment_t *)sge_address; 622 623 return ((SCI_PHYSICAL_ADDRESS)sge->ds_addr); 624 } 625 626 /** 627 * @brief This callback method asks the user to provide the contents of the 628 * "length" field in the Scatter-Gather Element. 629 * 630 * @param[in] scif_user_io_request This parameter points to the user's 631 * IO request object. It is a cookie that allows the user to 632 * provide the necessary information for this callback. 633 * @param[in] sge_address This parameter specifies the address for the 634 * SGE from which to retrieve the address field. 635 * 636 * @return This method returns the length field specified inside the SGE 637 * referenced by the sge_address parameter. 638 */ 639 uint32_t 640 scif_cb_sge_get_length_field(void *scif_user_io_request, void *sge_address) 641 { 642 bus_dma_segment_t *sge = (bus_dma_segment_t *)sge_address; 643 644 return ((uint32_t)sge->ds_len); 645 } 646 647 void 648 isci_request_construct(struct ISCI_REQUEST *request, 649 SCI_CONTROLLER_HANDLE_T scif_controller_handle, 650 bus_dma_tag_t io_buffer_dma_tag, bus_addr_t physical_address) 651 { 652 653 request->controller_handle = scif_controller_handle; 654 request->dma_tag = io_buffer_dma_tag; 655 request->physical_address = physical_address; 656 bus_dmamap_create(request->dma_tag, 0, &request->dma_map); 657 callout_init(&request->timer, CALLOUT_MPSAFE); 658 } 659 660 static void 661 isci_io_request_construct(void *arg, bus_dma_segment_t *seg, int nseg, 662 int error) 663 { 664 union ccb *ccb; 665 struct ISCI_IO_REQUEST *io_request = (struct ISCI_IO_REQUEST *)arg; 666 SCI_REMOTE_DEVICE_HANDLE_T *device = io_request->parent.remote_device_handle; 667 SCI_STATUS status; 668 669 io_request->num_segments = nseg; 670 io_request->sge = seg; 671 ccb = io_request->ccb; 672 673 /* XXX More cleanup is needed here */ 674 if ((nseg == 0) || (error != 0)) { 675 ccb->ccb_h.status = CAM_REQ_INVALID; 676 xpt_done(ccb); 677 return; 678 } 679 680 status = scif_io_request_construct( 681 io_request->parent.controller_handle, 682 io_request->parent.remote_device_handle, 683 SCI_CONTROLLER_INVALID_IO_TAG, (void *)io_request, 684 (void *)((char*)io_request + sizeof(struct ISCI_IO_REQUEST)), 685 &io_request->sci_object); 686 687 if (status != SCI_SUCCESS) { 688 isci_io_request_complete(io_request->parent.controller_handle, 689 device, io_request, (SCI_IO_STATUS)status); 690 return; 691 } 692 693 sci_object_set_association(io_request->sci_object, io_request); 694 695 bus_dmamap_sync(io_request->parent.dma_tag, io_request->parent.dma_map, 696 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 697 698 status = (SCI_STATUS)scif_controller_start_io( 699 io_request->parent.controller_handle, device, 700 io_request->sci_object, SCI_CONTROLLER_INVALID_IO_TAG); 701 702 if (status != SCI_SUCCESS) { 703 isci_io_request_complete(io_request->parent.controller_handle, 704 device, io_request, (SCI_IO_STATUS)status); 705 return; 706 } 707 708 if (ccb->ccb_h.timeout != CAM_TIME_INFINITY) 709 callout_reset(&io_request->parent.timer, ccb->ccb_h.timeout, 710 isci_io_request_timeout, io_request); 711 } 712 713 void 714 isci_io_request_execute_scsi_io(union ccb *ccb, 715 struct ISCI_CONTROLLER *controller) 716 { 717 struct ccb_scsiio *csio = &ccb->csio; 718 target_id_t target_id = ccb->ccb_h.target_id; 719 struct ISCI_REQUEST *request; 720 struct ISCI_IO_REQUEST *io_request; 721 struct ISCI_REMOTE_DEVICE *device = 722 controller->remote_device[target_id]; 723 int error; 724 725 if (device == NULL) { 726 ccb->ccb_h.status &= ~CAM_SIM_QUEUED; 727 ccb->ccb_h.status &= ~CAM_STATUS_MASK; 728 ccb->ccb_h.status |= CAM_DEV_NOT_THERE; 729 xpt_done(ccb); 730 return; 731 } 732 733 if (sci_pool_empty(controller->request_pool)) { 734 ccb->ccb_h.status &= ~CAM_SIM_QUEUED; 735 ccb->ccb_h.status &= ~CAM_STATUS_MASK; 736 ccb->ccb_h.status |= CAM_REQUEUE_REQ; 737 xpt_freeze_simq(controller->sim, 1); 738 controller->is_frozen = TRUE; 739 xpt_done(ccb); 740 return; 741 } 742 743 ASSERT(device->is_resetting == FALSE); 744 745 sci_pool_get(controller->request_pool, request); 746 io_request = (struct ISCI_IO_REQUEST *)request; 747 748 io_request->ccb = ccb; 749 io_request->current_sge_index = 0; 750 io_request->parent.remote_device_handle = device->sci_object; 751 752 if ((ccb->ccb_h.flags & CAM_SCATTER_VALID) != 0) 753 panic("Unexpected CAM_SCATTER_VALID flag! flags = 0x%x\n", 754 ccb->ccb_h.flags); 755 756 if ((ccb->ccb_h.flags & CAM_DATA_PHYS) != 0) 757 panic("Unexpected CAM_DATA_PHYS flag! flags = 0x%x\n", 758 ccb->ccb_h.flags); 759 760 error = bus_dmamap_load(io_request->parent.dma_tag, 761 io_request->parent.dma_map, csio->data_ptr, csio->dxfer_len, 762 isci_io_request_construct, io_request, 0x0); 763 764 /* A resource shortage from BUSDMA will be automatically 765 * continued at a later point, pushing the CCB processing 766 * forward, which will in turn unfreeze the simq. 767 */ 768 if (error == EINPROGRESS) { 769 xpt_freeze_simq(controller->sim, 1); 770 ccb->ccb_h.flags |= CAM_RELEASE_SIMQ; 771 } 772 } 773 774 void 775 isci_io_request_timeout(void *arg) 776 { 777 struct ISCI_IO_REQUEST *request = (struct ISCI_IO_REQUEST *)arg; 778 struct ISCI_REMOTE_DEVICE *remote_device = (struct ISCI_REMOTE_DEVICE *) 779 sci_object_get_association(request->parent.remote_device_handle); 780 struct ISCI_CONTROLLER *controller = remote_device->domain->controller; 781 782 mtx_lock(&controller->lock); 783 isci_remote_device_reset(remote_device, NULL); 784 mtx_unlock(&controller->lock); 785 } 786 787 #if __FreeBSD_version >= 900026 788 /** 789 * @brief This callback method gets the size of and pointer to the buffer 790 * (if any) containing the request buffer for an SMP request. 791 * 792 * @param[in] core_request This parameter specifies the SCI core's request 793 * object associated with the SMP request. 794 * @param[out] smp_request_buffer This parameter returns a pointer to the 795 * payload portion of the SMP request - i.e. everything after 796 * the SMP request header. 797 * 798 * @return Size of the request buffer in bytes. This does *not* include 799 * the size of the SMP request header. 800 */ 801 static uint32_t 802 smp_io_request_cb_get_request_buffer(SCI_IO_REQUEST_HANDLE_T core_request, 803 uint8_t ** smp_request_buffer) 804 { 805 struct ISCI_IO_REQUEST *isci_request = (struct ISCI_IO_REQUEST *) 806 sci_object_get_association(sci_object_get_association(core_request)); 807 808 *smp_request_buffer = isci_request->ccb->smpio.smp_request + 809 sizeof(SMP_REQUEST_HEADER_T); 810 811 return (isci_request->ccb->smpio.smp_request_len - 812 sizeof(SMP_REQUEST_HEADER_T)); 813 } 814 815 /** 816 * @brief This callback method gets the SMP function for an SMP request. 817 * 818 * @param[in] core_request This parameter specifies the SCI core's request 819 * object associated with the SMP request. 820 * 821 * @return SMP function for the SMP request. 822 */ 823 static uint8_t 824 smp_io_request_cb_get_function(SCI_IO_REQUEST_HANDLE_T core_request) 825 { 826 struct ISCI_IO_REQUEST *isci_request = (struct ISCI_IO_REQUEST *) 827 sci_object_get_association(sci_object_get_association(core_request)); 828 SMP_REQUEST_HEADER_T *header = 829 (SMP_REQUEST_HEADER_T *)isci_request->ccb->smpio.smp_request; 830 831 return (header->function); 832 } 833 834 /** 835 * @brief This callback method gets the SMP frame type for an SMP request. 836 * 837 * @param[in] core_request This parameter specifies the SCI core's request 838 * object associated with the SMP request. 839 * 840 * @return SMP frame type for the SMP request. 841 */ 842 static uint8_t 843 smp_io_request_cb_get_frame_type(SCI_IO_REQUEST_HANDLE_T core_request) 844 { 845 struct ISCI_IO_REQUEST *isci_request = (struct ISCI_IO_REQUEST *) 846 sci_object_get_association(sci_object_get_association(core_request)); 847 SMP_REQUEST_HEADER_T *header = 848 (SMP_REQUEST_HEADER_T *)isci_request->ccb->smpio.smp_request; 849 850 return (header->smp_frame_type); 851 } 852 853 /** 854 * @brief This callback method gets the allocated response length for an SMP request. 855 * 856 * @param[in] core_request This parameter specifies the SCI core's request 857 * object associated with the SMP request. 858 * 859 * @return Allocated response length for the SMP request. 860 */ 861 static uint8_t 862 smp_io_request_cb_get_allocated_response_length( 863 SCI_IO_REQUEST_HANDLE_T core_request) 864 { 865 struct ISCI_IO_REQUEST *isci_request = (struct ISCI_IO_REQUEST *) 866 sci_object_get_association(sci_object_get_association(core_request)); 867 SMP_REQUEST_HEADER_T *header = 868 (SMP_REQUEST_HEADER_T *)isci_request->ccb->smpio.smp_request; 869 870 return (header->allocated_response_length); 871 } 872 873 static SCI_STATUS 874 isci_smp_request_construct(struct ISCI_IO_REQUEST *request) 875 { 876 SCI_STATUS status; 877 SCIC_SMP_PASSTHRU_REQUEST_CALLBACKS_T callbacks; 878 879 status = scif_request_construct(request->parent.controller_handle, 880 request->parent.remote_device_handle, SCI_CONTROLLER_INVALID_IO_TAG, 881 (void *)request, 882 (void *)((char*)request + sizeof(struct ISCI_IO_REQUEST)), 883 &request->sci_object); 884 885 if (status == SCI_SUCCESS) { 886 callbacks.scic_cb_smp_passthru_get_request = 887 &smp_io_request_cb_get_request_buffer; 888 callbacks.scic_cb_smp_passthru_get_function = 889 &smp_io_request_cb_get_function; 890 callbacks.scic_cb_smp_passthru_get_frame_type = 891 &smp_io_request_cb_get_frame_type; 892 callbacks.scic_cb_smp_passthru_get_allocated_response_length = 893 &smp_io_request_cb_get_allocated_response_length; 894 895 /* create the smp passthrough part of the io request */ 896 status = scic_io_request_construct_smp_pass_through( 897 scif_io_request_get_scic_handle(request->sci_object), 898 &callbacks); 899 } 900 901 return (status); 902 } 903 904 void 905 isci_io_request_execute_smp_io(union ccb *ccb, 906 struct ISCI_CONTROLLER *controller) 907 { 908 SCI_STATUS status; 909 target_id_t target_id = ccb->ccb_h.target_id; 910 struct ISCI_REQUEST *request; 911 struct ISCI_IO_REQUEST *io_request; 912 SCI_REMOTE_DEVICE_HANDLE_T smp_device_handle; 913 struct ISCI_REMOTE_DEVICE *end_device = controller->remote_device[target_id]; 914 915 /* SMP commands are sent to an end device, because SMP devices are not 916 * exposed to the kernel. It is our responsibility to use this method 917 * to get the SMP device that contains the specified end device. If 918 * the device is direct-attached, the handle will come back NULL, and 919 * we'll just fail the SMP_IO with DEV_NOT_THERE. 920 */ 921 scif_remote_device_get_containing_device(end_device->sci_object, 922 &smp_device_handle); 923 924 if (smp_device_handle == NULL) { 925 ccb->ccb_h.status &= ~CAM_SIM_QUEUED; 926 ccb->ccb_h.status &= ~CAM_STATUS_MASK; 927 ccb->ccb_h.status |= CAM_DEV_NOT_THERE; 928 xpt_done(ccb); 929 return; 930 } 931 932 if (sci_pool_empty(controller->request_pool)) { 933 ccb->ccb_h.status &= ~CAM_SIM_QUEUED; 934 ccb->ccb_h.status &= ~CAM_STATUS_MASK; 935 ccb->ccb_h.status |= CAM_REQUEUE_REQ; 936 xpt_freeze_simq(controller->sim, 1); 937 controller->is_frozen = TRUE; 938 xpt_done(ccb); 939 return; 940 } 941 942 ASSERT(device->is_resetting == FALSE); 943 944 sci_pool_get(controller->request_pool, request); 945 io_request = (struct ISCI_IO_REQUEST *)request; 946 947 io_request->ccb = ccb; 948 io_request->parent.remote_device_handle = smp_device_handle; 949 950 status = isci_smp_request_construct(io_request); 951 952 if (status != SCI_SUCCESS) { 953 isci_io_request_complete(controller->scif_controller_handle, 954 smp_device_handle, io_request, (SCI_IO_STATUS)status); 955 return; 956 } 957 958 sci_object_set_association(io_request->sci_object, io_request); 959 960 status = (SCI_STATUS) scif_controller_start_io( 961 controller->scif_controller_handle, smp_device_handle, 962 io_request->sci_object, SCI_CONTROLLER_INVALID_IO_TAG); 963 964 if (status != SCI_SUCCESS) { 965 isci_io_request_complete(controller->scif_controller_handle, 966 smp_device_handle, io_request, (SCI_IO_STATUS)status); 967 return; 968 } 969 970 if (ccb->ccb_h.timeout != CAM_TIME_INFINITY) 971 callout_reset(&io_request->parent.timer, ccb->ccb_h.timeout, 972 isci_io_request_timeout, request); 973 } 974 #endif 975