1 /******************************************************************* 2 * This file is part of the Emulex Linux Device Driver for * 3 * Fibre Channel Host Bus Adapters. * 4 * Copyright (C) 2004-2011 Emulex. All rights reserved. * 5 * EMULEX and SLI are trademarks of Emulex. * 6 * www.emulex.com * 7 * Portions Copyright (C) 2004-2005 Christoph Hellwig * 8 * * 9 * This program is free software; you can redistribute it and/or * 10 * modify it under the terms of version 2 of the GNU General * 11 * Public License as published by the Free Software Foundation. * 12 * This program is distributed in the hope that it will be useful. * 13 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND * 14 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, * 15 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE * 16 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD * 17 * TO BE LEGALLY INVALID. See the GNU General Public License for * 18 * more details, a copy of which can be found in the file COPYING * 19 * included with this package. * 20 *******************************************************************/ 21 #include <linux/pci.h> 22 #include <linux/slab.h> 23 #include <linux/interrupt.h> 24 #include <linux/delay.h> 25 #include <asm/unaligned.h> 26 27 #include <scsi/scsi.h> 28 #include <scsi/scsi_device.h> 29 #include <scsi/scsi_eh.h> 30 #include <scsi/scsi_host.h> 31 #include <scsi/scsi_tcq.h> 32 #include <scsi/scsi_transport_fc.h> 33 34 #include "lpfc_version.h" 35 #include "lpfc_hw4.h" 36 #include "lpfc_hw.h" 37 #include "lpfc_sli.h" 38 #include "lpfc_sli4.h" 39 #include "lpfc_nl.h" 40 #include "lpfc_disc.h" 41 #include "lpfc_scsi.h" 42 #include "lpfc.h" 43 #include "lpfc_logmsg.h" 44 #include "lpfc_crtn.h" 45 #include "lpfc_vport.h" 46 47 #define LPFC_RESET_WAIT 2 48 #define LPFC_ABORT_WAIT 2 49 50 int _dump_buf_done; 51 52 static char *dif_op_str[] = { 53 "SCSI_PROT_NORMAL", 54 "SCSI_PROT_READ_INSERT", 55 "SCSI_PROT_WRITE_STRIP", 56 "SCSI_PROT_READ_STRIP", 57 "SCSI_PROT_WRITE_INSERT", 58 "SCSI_PROT_READ_PASS", 59 "SCSI_PROT_WRITE_PASS", 60 }; 61 static void 62 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb); 63 static void 64 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb); 65 66 static void 67 lpfc_debug_save_data(struct lpfc_hba *phba, struct scsi_cmnd *cmnd) 68 { 69 void *src, *dst; 70 struct scatterlist *sgde = scsi_sglist(cmnd); 71 72 if (!_dump_buf_data) { 73 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 74 "9050 BLKGRD: ERROR %s _dump_buf_data is NULL\n", 75 __func__); 76 return; 77 } 78 79 80 if (!sgde) { 81 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 82 "9051 BLKGRD: ERROR: data scatterlist is null\n"); 83 return; 84 } 85 86 dst = (void *) _dump_buf_data; 87 while (sgde) { 88 src = sg_virt(sgde); 89 memcpy(dst, src, sgde->length); 90 dst += sgde->length; 91 sgde = sg_next(sgde); 92 } 93 } 94 95 static void 96 lpfc_debug_save_dif(struct lpfc_hba *phba, struct scsi_cmnd *cmnd) 97 { 98 void *src, *dst; 99 struct scatterlist *sgde = scsi_prot_sglist(cmnd); 100 101 if (!_dump_buf_dif) { 102 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 103 "9052 BLKGRD: ERROR %s _dump_buf_data is NULL\n", 104 __func__); 105 return; 106 } 107 108 if (!sgde) { 109 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 110 "9053 BLKGRD: ERROR: prot scatterlist is null\n"); 111 return; 112 } 113 114 dst = _dump_buf_dif; 115 while (sgde) { 116 src = sg_virt(sgde); 117 memcpy(dst, src, sgde->length); 118 dst += sgde->length; 119 sgde = sg_next(sgde); 120 } 121 } 122 123 /** 124 * lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge. 125 * @phba: Pointer to HBA object. 126 * @lpfc_cmd: lpfc scsi command object pointer. 127 * 128 * This function is called from the lpfc_prep_task_mgmt_cmd function to 129 * set the last bit in the response sge entry. 130 **/ 131 static void 132 lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba, 133 struct lpfc_scsi_buf *lpfc_cmd) 134 { 135 struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl; 136 if (sgl) { 137 sgl += 1; 138 sgl->word2 = le32_to_cpu(sgl->word2); 139 bf_set(lpfc_sli4_sge_last, sgl, 1); 140 sgl->word2 = cpu_to_le32(sgl->word2); 141 } 142 } 143 144 /** 145 * lpfc_update_stats - Update statistical data for the command completion 146 * @phba: Pointer to HBA object. 147 * @lpfc_cmd: lpfc scsi command object pointer. 148 * 149 * This function is called when there is a command completion and this 150 * function updates the statistical data for the command completion. 151 **/ 152 static void 153 lpfc_update_stats(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 154 { 155 struct lpfc_rport_data *rdata = lpfc_cmd->rdata; 156 struct lpfc_nodelist *pnode = rdata->pnode; 157 struct scsi_cmnd *cmd = lpfc_cmd->pCmd; 158 unsigned long flags; 159 struct Scsi_Host *shost = cmd->device->host; 160 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 161 unsigned long latency; 162 int i; 163 164 if (cmd->result) 165 return; 166 167 latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time); 168 169 spin_lock_irqsave(shost->host_lock, flags); 170 if (!vport->stat_data_enabled || 171 vport->stat_data_blocked || 172 !pnode || 173 !pnode->lat_data || 174 (phba->bucket_type == LPFC_NO_BUCKET)) { 175 spin_unlock_irqrestore(shost->host_lock, flags); 176 return; 177 } 178 179 if (phba->bucket_type == LPFC_LINEAR_BUCKET) { 180 i = (latency + phba->bucket_step - 1 - phba->bucket_base)/ 181 phba->bucket_step; 182 /* check array subscript bounds */ 183 if (i < 0) 184 i = 0; 185 else if (i >= LPFC_MAX_BUCKET_COUNT) 186 i = LPFC_MAX_BUCKET_COUNT - 1; 187 } else { 188 for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++) 189 if (latency <= (phba->bucket_base + 190 ((1<<i)*phba->bucket_step))) 191 break; 192 } 193 194 pnode->lat_data[i].cmd_count++; 195 spin_unlock_irqrestore(shost->host_lock, flags); 196 } 197 198 /** 199 * lpfc_send_sdev_queuedepth_change_event - Posts a queuedepth change event 200 * @phba: Pointer to HBA context object. 201 * @vport: Pointer to vport object. 202 * @ndlp: Pointer to FC node associated with the target. 203 * @lun: Lun number of the scsi device. 204 * @old_val: Old value of the queue depth. 205 * @new_val: New value of the queue depth. 206 * 207 * This function sends an event to the mgmt application indicating 208 * there is a change in the scsi device queue depth. 209 **/ 210 static void 211 lpfc_send_sdev_queuedepth_change_event(struct lpfc_hba *phba, 212 struct lpfc_vport *vport, 213 struct lpfc_nodelist *ndlp, 214 uint32_t lun, 215 uint32_t old_val, 216 uint32_t new_val) 217 { 218 struct lpfc_fast_path_event *fast_path_evt; 219 unsigned long flags; 220 221 fast_path_evt = lpfc_alloc_fast_evt(phba); 222 if (!fast_path_evt) 223 return; 224 225 fast_path_evt->un.queue_depth_evt.scsi_event.event_type = 226 FC_REG_SCSI_EVENT; 227 fast_path_evt->un.queue_depth_evt.scsi_event.subcategory = 228 LPFC_EVENT_VARQUEDEPTH; 229 230 /* Report all luns with change in queue depth */ 231 fast_path_evt->un.queue_depth_evt.scsi_event.lun = lun; 232 if (ndlp && NLP_CHK_NODE_ACT(ndlp)) { 233 memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwpn, 234 &ndlp->nlp_portname, sizeof(struct lpfc_name)); 235 memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwnn, 236 &ndlp->nlp_nodename, sizeof(struct lpfc_name)); 237 } 238 239 fast_path_evt->un.queue_depth_evt.oldval = old_val; 240 fast_path_evt->un.queue_depth_evt.newval = new_val; 241 fast_path_evt->vport = vport; 242 243 fast_path_evt->work_evt.evt = LPFC_EVT_FASTPATH_MGMT_EVT; 244 spin_lock_irqsave(&phba->hbalock, flags); 245 list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list); 246 spin_unlock_irqrestore(&phba->hbalock, flags); 247 lpfc_worker_wake_up(phba); 248 249 return; 250 } 251 252 /** 253 * lpfc_change_queue_depth - Alter scsi device queue depth 254 * @sdev: Pointer the scsi device on which to change the queue depth. 255 * @qdepth: New queue depth to set the sdev to. 256 * @reason: The reason for the queue depth change. 257 * 258 * This function is called by the midlayer and the LLD to alter the queue 259 * depth for a scsi device. This function sets the queue depth to the new 260 * value and sends an event out to log the queue depth change. 261 **/ 262 int 263 lpfc_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason) 264 { 265 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 266 struct lpfc_hba *phba = vport->phba; 267 struct lpfc_rport_data *rdata; 268 unsigned long new_queue_depth, old_queue_depth; 269 270 old_queue_depth = sdev->queue_depth; 271 scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth); 272 new_queue_depth = sdev->queue_depth; 273 rdata = sdev->hostdata; 274 if (rdata) 275 lpfc_send_sdev_queuedepth_change_event(phba, vport, 276 rdata->pnode, sdev->lun, 277 old_queue_depth, 278 new_queue_depth); 279 return sdev->queue_depth; 280 } 281 282 /** 283 * lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread 284 * @phba: The Hba for which this call is being executed. 285 * 286 * This routine is called when there is resource error in driver or firmware. 287 * This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine 288 * posts at most 1 event each second. This routine wakes up worker thread of 289 * @phba to process WORKER_RAM_DOWN_EVENT event. 290 * 291 * This routine should be called with no lock held. 292 **/ 293 void 294 lpfc_rampdown_queue_depth(struct lpfc_hba *phba) 295 { 296 unsigned long flags; 297 uint32_t evt_posted; 298 299 spin_lock_irqsave(&phba->hbalock, flags); 300 atomic_inc(&phba->num_rsrc_err); 301 phba->last_rsrc_error_time = jiffies; 302 303 if ((phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL) > jiffies) { 304 spin_unlock_irqrestore(&phba->hbalock, flags); 305 return; 306 } 307 308 phba->last_ramp_down_time = jiffies; 309 310 spin_unlock_irqrestore(&phba->hbalock, flags); 311 312 spin_lock_irqsave(&phba->pport->work_port_lock, flags); 313 evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE; 314 if (!evt_posted) 315 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE; 316 spin_unlock_irqrestore(&phba->pport->work_port_lock, flags); 317 318 if (!evt_posted) 319 lpfc_worker_wake_up(phba); 320 return; 321 } 322 323 /** 324 * lpfc_rampup_queue_depth - Post RAMP_UP_QUEUE event for worker thread 325 * @phba: The Hba for which this call is being executed. 326 * 327 * This routine post WORKER_RAMP_UP_QUEUE event for @phba vport. This routine 328 * post at most 1 event every 5 minute after last_ramp_up_time or 329 * last_rsrc_error_time. This routine wakes up worker thread of @phba 330 * to process WORKER_RAM_DOWN_EVENT event. 331 * 332 * This routine should be called with no lock held. 333 **/ 334 static inline void 335 lpfc_rampup_queue_depth(struct lpfc_vport *vport, 336 uint32_t queue_depth) 337 { 338 unsigned long flags; 339 struct lpfc_hba *phba = vport->phba; 340 uint32_t evt_posted; 341 atomic_inc(&phba->num_cmd_success); 342 343 if (vport->cfg_lun_queue_depth <= queue_depth) 344 return; 345 spin_lock_irqsave(&phba->hbalock, flags); 346 if (time_before(jiffies, 347 phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) || 348 time_before(jiffies, 349 phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL)) { 350 spin_unlock_irqrestore(&phba->hbalock, flags); 351 return; 352 } 353 phba->last_ramp_up_time = jiffies; 354 spin_unlock_irqrestore(&phba->hbalock, flags); 355 356 spin_lock_irqsave(&phba->pport->work_port_lock, flags); 357 evt_posted = phba->pport->work_port_events & WORKER_RAMP_UP_QUEUE; 358 if (!evt_posted) 359 phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE; 360 spin_unlock_irqrestore(&phba->pport->work_port_lock, flags); 361 362 if (!evt_posted) 363 lpfc_worker_wake_up(phba); 364 return; 365 } 366 367 /** 368 * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler 369 * @phba: The Hba for which this call is being executed. 370 * 371 * This routine is called to process WORKER_RAMP_DOWN_QUEUE event for worker 372 * thread.This routine reduces queue depth for all scsi device on each vport 373 * associated with @phba. 374 **/ 375 void 376 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba) 377 { 378 struct lpfc_vport **vports; 379 struct Scsi_Host *shost; 380 struct scsi_device *sdev; 381 unsigned long new_queue_depth; 382 unsigned long num_rsrc_err, num_cmd_success; 383 int i; 384 385 num_rsrc_err = atomic_read(&phba->num_rsrc_err); 386 num_cmd_success = atomic_read(&phba->num_cmd_success); 387 388 vports = lpfc_create_vport_work_array(phba); 389 if (vports != NULL) 390 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) { 391 shost = lpfc_shost_from_vport(vports[i]); 392 shost_for_each_device(sdev, shost) { 393 new_queue_depth = 394 sdev->queue_depth * num_rsrc_err / 395 (num_rsrc_err + num_cmd_success); 396 if (!new_queue_depth) 397 new_queue_depth = sdev->queue_depth - 1; 398 else 399 new_queue_depth = sdev->queue_depth - 400 new_queue_depth; 401 lpfc_change_queue_depth(sdev, new_queue_depth, 402 SCSI_QDEPTH_DEFAULT); 403 } 404 } 405 lpfc_destroy_vport_work_array(phba, vports); 406 atomic_set(&phba->num_rsrc_err, 0); 407 atomic_set(&phba->num_cmd_success, 0); 408 } 409 410 /** 411 * lpfc_ramp_up_queue_handler - WORKER_RAMP_UP_QUEUE event handler 412 * @phba: The Hba for which this call is being executed. 413 * 414 * This routine is called to process WORKER_RAMP_UP_QUEUE event for worker 415 * thread.This routine increases queue depth for all scsi device on each vport 416 * associated with @phba by 1. This routine also sets @phba num_rsrc_err and 417 * num_cmd_success to zero. 418 **/ 419 void 420 lpfc_ramp_up_queue_handler(struct lpfc_hba *phba) 421 { 422 struct lpfc_vport **vports; 423 struct Scsi_Host *shost; 424 struct scsi_device *sdev; 425 int i; 426 427 vports = lpfc_create_vport_work_array(phba); 428 if (vports != NULL) 429 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) { 430 shost = lpfc_shost_from_vport(vports[i]); 431 shost_for_each_device(sdev, shost) { 432 if (vports[i]->cfg_lun_queue_depth <= 433 sdev->queue_depth) 434 continue; 435 lpfc_change_queue_depth(sdev, 436 sdev->queue_depth+1, 437 SCSI_QDEPTH_RAMP_UP); 438 } 439 } 440 lpfc_destroy_vport_work_array(phba, vports); 441 atomic_set(&phba->num_rsrc_err, 0); 442 atomic_set(&phba->num_cmd_success, 0); 443 } 444 445 /** 446 * lpfc_scsi_dev_block - set all scsi hosts to block state 447 * @phba: Pointer to HBA context object. 448 * 449 * This function walks vport list and set each SCSI host to block state 450 * by invoking fc_remote_port_delete() routine. This function is invoked 451 * with EEH when device's PCI slot has been permanently disabled. 452 **/ 453 void 454 lpfc_scsi_dev_block(struct lpfc_hba *phba) 455 { 456 struct lpfc_vport **vports; 457 struct Scsi_Host *shost; 458 struct scsi_device *sdev; 459 struct fc_rport *rport; 460 int i; 461 462 vports = lpfc_create_vport_work_array(phba); 463 if (vports != NULL) 464 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) { 465 shost = lpfc_shost_from_vport(vports[i]); 466 shost_for_each_device(sdev, shost) { 467 rport = starget_to_rport(scsi_target(sdev)); 468 fc_remote_port_delete(rport); 469 } 470 } 471 lpfc_destroy_vport_work_array(phba, vports); 472 } 473 474 /** 475 * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec 476 * @vport: The virtual port for which this call being executed. 477 * @num_to_allocate: The requested number of buffers to allocate. 478 * 479 * This routine allocates a scsi buffer for device with SLI-3 interface spec, 480 * the scsi buffer contains all the necessary information needed to initiate 481 * a SCSI I/O. The non-DMAable buffer region contains information to build 482 * the IOCB. The DMAable region contains memory for the FCP CMND, FCP RSP, 483 * and the initial BPL. In addition to allocating memory, the FCP CMND and 484 * FCP RSP BDEs are setup in the BPL and the BPL BDE is setup in the IOCB. 485 * 486 * Return codes: 487 * int - number of scsi buffers that were allocated. 488 * 0 = failure, less than num_to_alloc is a partial failure. 489 **/ 490 static int 491 lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc) 492 { 493 struct lpfc_hba *phba = vport->phba; 494 struct lpfc_scsi_buf *psb; 495 struct ulp_bde64 *bpl; 496 IOCB_t *iocb; 497 dma_addr_t pdma_phys_fcp_cmd; 498 dma_addr_t pdma_phys_fcp_rsp; 499 dma_addr_t pdma_phys_bpl; 500 uint16_t iotag; 501 int bcnt; 502 503 for (bcnt = 0; bcnt < num_to_alloc; bcnt++) { 504 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL); 505 if (!psb) 506 break; 507 508 /* 509 * Get memory from the pci pool to map the virt space to pci 510 * bus space for an I/O. The DMA buffer includes space for the 511 * struct fcp_cmnd, struct fcp_rsp and the number of bde's 512 * necessary to support the sg_tablesize. 513 */ 514 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, 515 GFP_KERNEL, &psb->dma_handle); 516 if (!psb->data) { 517 kfree(psb); 518 break; 519 } 520 521 /* Initialize virtual ptrs to dma_buf region. */ 522 memset(psb->data, 0, phba->cfg_sg_dma_buf_size); 523 524 /* Allocate iotag for psb->cur_iocbq. */ 525 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq); 526 if (iotag == 0) { 527 pci_pool_free(phba->lpfc_scsi_dma_buf_pool, 528 psb->data, psb->dma_handle); 529 kfree(psb); 530 break; 531 } 532 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP; 533 534 psb->fcp_cmnd = psb->data; 535 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd); 536 psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) + 537 sizeof(struct fcp_rsp); 538 539 /* Initialize local short-hand pointers. */ 540 bpl = psb->fcp_bpl; 541 pdma_phys_fcp_cmd = psb->dma_handle; 542 pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd); 543 pdma_phys_bpl = psb->dma_handle + sizeof(struct fcp_cmnd) + 544 sizeof(struct fcp_rsp); 545 546 /* 547 * The first two bdes are the FCP_CMD and FCP_RSP. The balance 548 * are sg list bdes. Initialize the first two and leave the 549 * rest for queuecommand. 550 */ 551 bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd)); 552 bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd)); 553 bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd); 554 bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64; 555 bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w); 556 557 /* Setup the physical region for the FCP RSP */ 558 bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp)); 559 bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp)); 560 bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp); 561 bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64; 562 bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w); 563 564 /* 565 * Since the IOCB for the FCP I/O is built into this 566 * lpfc_scsi_buf, initialize it with all known data now. 567 */ 568 iocb = &psb->cur_iocbq.iocb; 569 iocb->un.fcpi64.bdl.ulpIoTag32 = 0; 570 if ((phba->sli_rev == 3) && 571 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) { 572 /* fill in immediate fcp command BDE */ 573 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED; 574 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd); 575 iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t, 576 unsli3.fcp_ext.icd); 577 iocb->un.fcpi64.bdl.addrHigh = 0; 578 iocb->ulpBdeCount = 0; 579 iocb->ulpLe = 0; 580 /* fill in response BDE */ 581 iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags = 582 BUFF_TYPE_BDE_64; 583 iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize = 584 sizeof(struct fcp_rsp); 585 iocb->unsli3.fcp_ext.rbde.addrLow = 586 putPaddrLow(pdma_phys_fcp_rsp); 587 iocb->unsli3.fcp_ext.rbde.addrHigh = 588 putPaddrHigh(pdma_phys_fcp_rsp); 589 } else { 590 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64; 591 iocb->un.fcpi64.bdl.bdeSize = 592 (2 * sizeof(struct ulp_bde64)); 593 iocb->un.fcpi64.bdl.addrLow = 594 putPaddrLow(pdma_phys_bpl); 595 iocb->un.fcpi64.bdl.addrHigh = 596 putPaddrHigh(pdma_phys_bpl); 597 iocb->ulpBdeCount = 1; 598 iocb->ulpLe = 1; 599 } 600 iocb->ulpClass = CLASS3; 601 psb->status = IOSTAT_SUCCESS; 602 /* Put it back into the SCSI buffer list */ 603 psb->cur_iocbq.context1 = psb; 604 lpfc_release_scsi_buf_s3(phba, psb); 605 606 } 607 608 return bcnt; 609 } 610 611 /** 612 * lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport 613 * @vport: pointer to lpfc vport data structure. 614 * 615 * This routine is invoked by the vport cleanup for deletions and the cleanup 616 * for an ndlp on removal. 617 **/ 618 void 619 lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport) 620 { 621 struct lpfc_hba *phba = vport->phba; 622 struct lpfc_scsi_buf *psb, *next_psb; 623 unsigned long iflag = 0; 624 625 spin_lock_irqsave(&phba->hbalock, iflag); 626 spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock); 627 list_for_each_entry_safe(psb, next_psb, 628 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) { 629 if (psb->rdata && psb->rdata->pnode 630 && psb->rdata->pnode->vport == vport) 631 psb->rdata = NULL; 632 } 633 spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock); 634 spin_unlock_irqrestore(&phba->hbalock, iflag); 635 } 636 637 /** 638 * lpfc_sli4_fcp_xri_aborted - Fast-path process of fcp xri abort 639 * @phba: pointer to lpfc hba data structure. 640 * @axri: pointer to the fcp xri abort wcqe structure. 641 * 642 * This routine is invoked by the worker thread to process a SLI4 fast-path 643 * FCP aborted xri. 644 **/ 645 void 646 lpfc_sli4_fcp_xri_aborted(struct lpfc_hba *phba, 647 struct sli4_wcqe_xri_aborted *axri) 648 { 649 uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri); 650 uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri); 651 struct lpfc_scsi_buf *psb, *next_psb; 652 unsigned long iflag = 0; 653 struct lpfc_iocbq *iocbq; 654 int i; 655 struct lpfc_nodelist *ndlp; 656 int rrq_empty = 0; 657 struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING]; 658 659 spin_lock_irqsave(&phba->hbalock, iflag); 660 spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock); 661 list_for_each_entry_safe(psb, next_psb, 662 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) { 663 if (psb->cur_iocbq.sli4_xritag == xri) { 664 list_del(&psb->list); 665 psb->exch_busy = 0; 666 psb->status = IOSTAT_SUCCESS; 667 spin_unlock( 668 &phba->sli4_hba.abts_scsi_buf_list_lock); 669 if (psb->rdata && psb->rdata->pnode) 670 ndlp = psb->rdata->pnode; 671 else 672 ndlp = NULL; 673 674 rrq_empty = list_empty(&phba->active_rrq_list); 675 spin_unlock_irqrestore(&phba->hbalock, iflag); 676 if (ndlp) 677 lpfc_set_rrq_active(phba, ndlp, xri, rxid, 1); 678 lpfc_release_scsi_buf_s4(phba, psb); 679 if (rrq_empty) 680 lpfc_worker_wake_up(phba); 681 return; 682 } 683 } 684 spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock); 685 for (i = 1; i <= phba->sli.last_iotag; i++) { 686 iocbq = phba->sli.iocbq_lookup[i]; 687 688 if (!(iocbq->iocb_flag & LPFC_IO_FCP) || 689 (iocbq->iocb_flag & LPFC_IO_LIBDFC)) 690 continue; 691 if (iocbq->sli4_xritag != xri) 692 continue; 693 psb = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq); 694 psb->exch_busy = 0; 695 spin_unlock_irqrestore(&phba->hbalock, iflag); 696 if (pring->txq_cnt) 697 lpfc_worker_wake_up(phba); 698 return; 699 700 } 701 spin_unlock_irqrestore(&phba->hbalock, iflag); 702 } 703 704 /** 705 * lpfc_sli4_repost_scsi_sgl_list - Repsot the Scsi buffers sgl pages as block 706 * @phba: pointer to lpfc hba data structure. 707 * 708 * This routine walks the list of scsi buffers that have been allocated and 709 * repost them to the HBA by using SGL block post. This is needed after a 710 * pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine 711 * is responsible for moving all scsi buffers on the lpfc_abts_scsi_sgl_list 712 * to the lpfc_scsi_buf_list. If the repost fails, reject all scsi buffers. 713 * 714 * Returns: 0 = success, non-zero failure. 715 **/ 716 int 717 lpfc_sli4_repost_scsi_sgl_list(struct lpfc_hba *phba) 718 { 719 struct lpfc_scsi_buf *psb; 720 int index, status, bcnt = 0, rcnt = 0, rc = 0; 721 LIST_HEAD(sblist); 722 723 for (index = 0; index < phba->sli4_hba.scsi_xri_cnt; index++) { 724 psb = phba->sli4_hba.lpfc_scsi_psb_array[index]; 725 if (psb) { 726 /* Remove from SCSI buffer list */ 727 list_del(&psb->list); 728 /* Add it to a local SCSI buffer list */ 729 list_add_tail(&psb->list, &sblist); 730 if (++rcnt == LPFC_NEMBED_MBOX_SGL_CNT) { 731 bcnt = rcnt; 732 rcnt = 0; 733 } 734 } else 735 /* A hole present in the XRI array, need to skip */ 736 bcnt = rcnt; 737 738 if (index == phba->sli4_hba.scsi_xri_cnt - 1) 739 /* End of XRI array for SCSI buffer, complete */ 740 bcnt = rcnt; 741 742 /* Continue until collect up to a nembed page worth of sgls */ 743 if (bcnt == 0) 744 continue; 745 /* Now, post the SCSI buffer list sgls as a block */ 746 if (!phba->sli4_hba.extents_in_use) 747 status = lpfc_sli4_post_scsi_sgl_block(phba, 748 &sblist, 749 bcnt); 750 else 751 status = lpfc_sli4_post_scsi_sgl_blk_ext(phba, 752 &sblist, 753 bcnt); 754 /* Reset SCSI buffer count for next round of posting */ 755 bcnt = 0; 756 while (!list_empty(&sblist)) { 757 list_remove_head(&sblist, psb, struct lpfc_scsi_buf, 758 list); 759 if (status) { 760 /* Put this back on the abort scsi list */ 761 psb->exch_busy = 1; 762 rc++; 763 } else { 764 psb->exch_busy = 0; 765 psb->status = IOSTAT_SUCCESS; 766 } 767 /* Put it back into the SCSI buffer list */ 768 lpfc_release_scsi_buf_s4(phba, psb); 769 } 770 } 771 return rc; 772 } 773 774 /** 775 * lpfc_new_scsi_buf_s4 - Scsi buffer allocator for HBA with SLI4 IF spec 776 * @vport: The virtual port for which this call being executed. 777 * @num_to_allocate: The requested number of buffers to allocate. 778 * 779 * This routine allocates a scsi buffer for device with SLI-4 interface spec, 780 * the scsi buffer contains all the necessary information needed to initiate 781 * a SCSI I/O. 782 * 783 * Return codes: 784 * int - number of scsi buffers that were allocated. 785 * 0 = failure, less than num_to_alloc is a partial failure. 786 **/ 787 static int 788 lpfc_new_scsi_buf_s4(struct lpfc_vport *vport, int num_to_alloc) 789 { 790 struct lpfc_hba *phba = vport->phba; 791 struct lpfc_scsi_buf *psb; 792 struct sli4_sge *sgl; 793 IOCB_t *iocb; 794 dma_addr_t pdma_phys_fcp_cmd; 795 dma_addr_t pdma_phys_fcp_rsp; 796 dma_addr_t pdma_phys_bpl, pdma_phys_bpl1; 797 uint16_t iotag, last_xritag = NO_XRI, lxri = 0; 798 int status = 0, index; 799 int bcnt; 800 int non_sequential_xri = 0; 801 LIST_HEAD(sblist); 802 803 for (bcnt = 0; bcnt < num_to_alloc; bcnt++) { 804 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL); 805 if (!psb) 806 break; 807 808 /* 809 * Get memory from the pci pool to map the virt space to pci bus 810 * space for an I/O. The DMA buffer includes space for the 811 * struct fcp_cmnd, struct fcp_rsp and the number of bde's 812 * necessary to support the sg_tablesize. 813 */ 814 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, 815 GFP_KERNEL, &psb->dma_handle); 816 if (!psb->data) { 817 kfree(psb); 818 break; 819 } 820 821 /* Initialize virtual ptrs to dma_buf region. */ 822 memset(psb->data, 0, phba->cfg_sg_dma_buf_size); 823 824 /* Allocate iotag for psb->cur_iocbq. */ 825 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq); 826 if (iotag == 0) { 827 pci_pool_free(phba->lpfc_scsi_dma_buf_pool, 828 psb->data, psb->dma_handle); 829 kfree(psb); 830 break; 831 } 832 833 lxri = lpfc_sli4_next_xritag(phba); 834 if (lxri == NO_XRI) { 835 pci_pool_free(phba->lpfc_scsi_dma_buf_pool, 836 psb->data, psb->dma_handle); 837 kfree(psb); 838 break; 839 } 840 psb->cur_iocbq.sli4_lxritag = lxri; 841 psb->cur_iocbq.sli4_xritag = phba->sli4_hba.xri_ids[lxri]; 842 if (last_xritag != NO_XRI 843 && psb->cur_iocbq.sli4_xritag != (last_xritag+1)) { 844 non_sequential_xri = 1; 845 } else 846 list_add_tail(&psb->list, &sblist); 847 last_xritag = psb->cur_iocbq.sli4_xritag; 848 849 index = phba->sli4_hba.scsi_xri_cnt++; 850 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP; 851 852 psb->fcp_bpl = psb->data; 853 psb->fcp_cmnd = (psb->data + phba->cfg_sg_dma_buf_size) 854 - (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp)); 855 psb->fcp_rsp = (struct fcp_rsp *)((uint8_t *)psb->fcp_cmnd + 856 sizeof(struct fcp_cmnd)); 857 858 /* Initialize local short-hand pointers. */ 859 sgl = (struct sli4_sge *)psb->fcp_bpl; 860 pdma_phys_bpl = psb->dma_handle; 861 pdma_phys_fcp_cmd = 862 (psb->dma_handle + phba->cfg_sg_dma_buf_size) 863 - (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp)); 864 pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd); 865 866 /* 867 * The first two bdes are the FCP_CMD and FCP_RSP. The balance 868 * are sg list bdes. Initialize the first two and leave the 869 * rest for queuecommand. 870 */ 871 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd)); 872 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd)); 873 sgl->word2 = le32_to_cpu(sgl->word2); 874 bf_set(lpfc_sli4_sge_last, sgl, 0); 875 sgl->word2 = cpu_to_le32(sgl->word2); 876 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd)); 877 sgl++; 878 879 /* Setup the physical region for the FCP RSP */ 880 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp)); 881 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp)); 882 sgl->word2 = le32_to_cpu(sgl->word2); 883 bf_set(lpfc_sli4_sge_last, sgl, 1); 884 sgl->word2 = cpu_to_le32(sgl->word2); 885 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp)); 886 887 /* 888 * Since the IOCB for the FCP I/O is built into this 889 * lpfc_scsi_buf, initialize it with all known data now. 890 */ 891 iocb = &psb->cur_iocbq.iocb; 892 iocb->un.fcpi64.bdl.ulpIoTag32 = 0; 893 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_64; 894 /* setting the BLP size to 2 * sizeof BDE may not be correct. 895 * We are setting the bpl to point to out sgl. An sgl's 896 * entries are 16 bytes, a bpl entries are 12 bytes. 897 */ 898 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd); 899 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_fcp_cmd); 900 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_fcp_cmd); 901 iocb->ulpBdeCount = 1; 902 iocb->ulpLe = 1; 903 iocb->ulpClass = CLASS3; 904 psb->cur_iocbq.context1 = psb; 905 if (phba->cfg_sg_dma_buf_size > SGL_PAGE_SIZE) 906 pdma_phys_bpl1 = pdma_phys_bpl + SGL_PAGE_SIZE; 907 else 908 pdma_phys_bpl1 = 0; 909 psb->dma_phys_bpl = pdma_phys_bpl; 910 phba->sli4_hba.lpfc_scsi_psb_array[index] = psb; 911 if (non_sequential_xri) { 912 status = lpfc_sli4_post_sgl(phba, pdma_phys_bpl, 913 pdma_phys_bpl1, 914 psb->cur_iocbq.sli4_xritag); 915 if (status) { 916 /* Put this back on the abort scsi list */ 917 psb->exch_busy = 1; 918 } else { 919 psb->exch_busy = 0; 920 psb->status = IOSTAT_SUCCESS; 921 } 922 /* Put it back into the SCSI buffer list */ 923 lpfc_release_scsi_buf_s4(phba, psb); 924 break; 925 } 926 } 927 if (bcnt) { 928 if (!phba->sli4_hba.extents_in_use) 929 status = lpfc_sli4_post_scsi_sgl_block(phba, 930 &sblist, 931 bcnt); 932 else 933 status = lpfc_sli4_post_scsi_sgl_blk_ext(phba, 934 &sblist, 935 bcnt); 936 937 if (status) { 938 lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI, 939 "3021 SCSI SGL post error %d\n", 940 status); 941 bcnt = 0; 942 } 943 /* Reset SCSI buffer count for next round of posting */ 944 while (!list_empty(&sblist)) { 945 list_remove_head(&sblist, psb, struct lpfc_scsi_buf, 946 list); 947 if (status) { 948 /* Put this back on the abort scsi list */ 949 psb->exch_busy = 1; 950 } else { 951 psb->exch_busy = 0; 952 psb->status = IOSTAT_SUCCESS; 953 } 954 /* Put it back into the SCSI buffer list */ 955 lpfc_release_scsi_buf_s4(phba, psb); 956 } 957 } 958 959 return bcnt + non_sequential_xri; 960 } 961 962 /** 963 * lpfc_new_scsi_buf - Wrapper funciton for scsi buffer allocator 964 * @vport: The virtual port for which this call being executed. 965 * @num_to_allocate: The requested number of buffers to allocate. 966 * 967 * This routine wraps the actual SCSI buffer allocator function pointer from 968 * the lpfc_hba struct. 969 * 970 * Return codes: 971 * int - number of scsi buffers that were allocated. 972 * 0 = failure, less than num_to_alloc is a partial failure. 973 **/ 974 static inline int 975 lpfc_new_scsi_buf(struct lpfc_vport *vport, int num_to_alloc) 976 { 977 return vport->phba->lpfc_new_scsi_buf(vport, num_to_alloc); 978 } 979 980 /** 981 * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA 982 * @phba: The HBA for which this call is being executed. 983 * 984 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list 985 * and returns to caller. 986 * 987 * Return codes: 988 * NULL - Error 989 * Pointer to lpfc_scsi_buf - Success 990 **/ 991 static struct lpfc_scsi_buf* 992 lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) 993 { 994 struct lpfc_scsi_buf * lpfc_cmd = NULL; 995 struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list; 996 unsigned long iflag = 0; 997 998 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag); 999 list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list); 1000 if (lpfc_cmd) { 1001 lpfc_cmd->seg_cnt = 0; 1002 lpfc_cmd->nonsg_phys = 0; 1003 lpfc_cmd->prot_seg_cnt = 0; 1004 } 1005 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag); 1006 return lpfc_cmd; 1007 } 1008 /** 1009 * lpfc_get_scsi_buf_s4 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA 1010 * @phba: The HBA for which this call is being executed. 1011 * 1012 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list 1013 * and returns to caller. 1014 * 1015 * Return codes: 1016 * NULL - Error 1017 * Pointer to lpfc_scsi_buf - Success 1018 **/ 1019 static struct lpfc_scsi_buf* 1020 lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) 1021 { 1022 struct lpfc_scsi_buf *lpfc_cmd ; 1023 unsigned long iflag = 0; 1024 int found = 0; 1025 1026 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag); 1027 list_for_each_entry(lpfc_cmd, &phba->lpfc_scsi_buf_list, 1028 list) { 1029 if (lpfc_test_rrq_active(phba, ndlp, 1030 lpfc_cmd->cur_iocbq.sli4_xritag)) 1031 continue; 1032 list_del(&lpfc_cmd->list); 1033 found = 1; 1034 lpfc_cmd->seg_cnt = 0; 1035 lpfc_cmd->nonsg_phys = 0; 1036 lpfc_cmd->prot_seg_cnt = 0; 1037 break; 1038 } 1039 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, 1040 iflag); 1041 if (!found) 1042 return NULL; 1043 else 1044 return lpfc_cmd; 1045 } 1046 /** 1047 * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA 1048 * @phba: The HBA for which this call is being executed. 1049 * 1050 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list 1051 * and returns to caller. 1052 * 1053 * Return codes: 1054 * NULL - Error 1055 * Pointer to lpfc_scsi_buf - Success 1056 **/ 1057 static struct lpfc_scsi_buf* 1058 lpfc_get_scsi_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) 1059 { 1060 return phba->lpfc_get_scsi_buf(phba, ndlp); 1061 } 1062 1063 /** 1064 * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list 1065 * @phba: The Hba for which this call is being executed. 1066 * @psb: The scsi buffer which is being released. 1067 * 1068 * This routine releases @psb scsi buffer by adding it to tail of @phba 1069 * lpfc_scsi_buf_list list. 1070 **/ 1071 static void 1072 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 1073 { 1074 unsigned long iflag = 0; 1075 1076 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag); 1077 psb->pCmd = NULL; 1078 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list); 1079 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag); 1080 } 1081 1082 /** 1083 * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list. 1084 * @phba: The Hba for which this call is being executed. 1085 * @psb: The scsi buffer which is being released. 1086 * 1087 * This routine releases @psb scsi buffer by adding it to tail of @phba 1088 * lpfc_scsi_buf_list list. For SLI4 XRI's are tied to the scsi buffer 1089 * and cannot be reused for at least RA_TOV amount of time if it was 1090 * aborted. 1091 **/ 1092 static void 1093 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 1094 { 1095 unsigned long iflag = 0; 1096 1097 if (psb->exch_busy) { 1098 spin_lock_irqsave(&phba->sli4_hba.abts_scsi_buf_list_lock, 1099 iflag); 1100 psb->pCmd = NULL; 1101 list_add_tail(&psb->list, 1102 &phba->sli4_hba.lpfc_abts_scsi_buf_list); 1103 spin_unlock_irqrestore(&phba->sli4_hba.abts_scsi_buf_list_lock, 1104 iflag); 1105 } else { 1106 1107 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag); 1108 psb->pCmd = NULL; 1109 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list); 1110 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag); 1111 } 1112 } 1113 1114 /** 1115 * lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list. 1116 * @phba: The Hba for which this call is being executed. 1117 * @psb: The scsi buffer which is being released. 1118 * 1119 * This routine releases @psb scsi buffer by adding it to tail of @phba 1120 * lpfc_scsi_buf_list list. 1121 **/ 1122 static void 1123 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 1124 { 1125 1126 phba->lpfc_release_scsi_buf(phba, psb); 1127 } 1128 1129 /** 1130 * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec 1131 * @phba: The Hba for which this call is being executed. 1132 * @lpfc_cmd: The scsi buffer which is going to be mapped. 1133 * 1134 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd 1135 * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans 1136 * through sg elements and format the bdea. This routine also initializes all 1137 * IOCB fields which are dependent on scsi command request buffer. 1138 * 1139 * Return codes: 1140 * 1 - Error 1141 * 0 - Success 1142 **/ 1143 static int 1144 lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 1145 { 1146 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 1147 struct scatterlist *sgel = NULL; 1148 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 1149 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl; 1150 struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq; 1151 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 1152 struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde; 1153 dma_addr_t physaddr; 1154 uint32_t num_bde = 0; 1155 int nseg, datadir = scsi_cmnd->sc_data_direction; 1156 1157 /* 1158 * There are three possibilities here - use scatter-gather segment, use 1159 * the single mapping, or neither. Start the lpfc command prep by 1160 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first 1161 * data bde entry. 1162 */ 1163 bpl += 2; 1164 if (scsi_sg_count(scsi_cmnd)) { 1165 /* 1166 * The driver stores the segment count returned from pci_map_sg 1167 * because this a count of dma-mappings used to map the use_sg 1168 * pages. They are not guaranteed to be the same for those 1169 * architectures that implement an IOMMU. 1170 */ 1171 1172 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd), 1173 scsi_sg_count(scsi_cmnd), datadir); 1174 if (unlikely(!nseg)) 1175 return 1; 1176 1177 lpfc_cmd->seg_cnt = nseg; 1178 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { 1179 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1180 "9064 BLKGRD: %s: Too many sg segments from " 1181 "dma_map_sg. Config %d, seg_cnt %d\n", 1182 __func__, phba->cfg_sg_seg_cnt, 1183 lpfc_cmd->seg_cnt); 1184 scsi_dma_unmap(scsi_cmnd); 1185 return 1; 1186 } 1187 1188 /* 1189 * The driver established a maximum scatter-gather segment count 1190 * during probe that limits the number of sg elements in any 1191 * single scsi command. Just run through the seg_cnt and format 1192 * the bde's. 1193 * When using SLI-3 the driver will try to fit all the BDEs into 1194 * the IOCB. If it can't then the BDEs get added to a BPL as it 1195 * does for SLI-2 mode. 1196 */ 1197 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) { 1198 physaddr = sg_dma_address(sgel); 1199 if (phba->sli_rev == 3 && 1200 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) && 1201 !(iocbq->iocb_flag & DSS_SECURITY_OP) && 1202 nseg <= LPFC_EXT_DATA_BDE_COUNT) { 1203 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 1204 data_bde->tus.f.bdeSize = sg_dma_len(sgel); 1205 data_bde->addrLow = putPaddrLow(physaddr); 1206 data_bde->addrHigh = putPaddrHigh(physaddr); 1207 data_bde++; 1208 } else { 1209 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 1210 bpl->tus.f.bdeSize = sg_dma_len(sgel); 1211 bpl->tus.w = le32_to_cpu(bpl->tus.w); 1212 bpl->addrLow = 1213 le32_to_cpu(putPaddrLow(physaddr)); 1214 bpl->addrHigh = 1215 le32_to_cpu(putPaddrHigh(physaddr)); 1216 bpl++; 1217 } 1218 } 1219 } 1220 1221 /* 1222 * Finish initializing those IOCB fields that are dependent on the 1223 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is 1224 * explicitly reinitialized and for SLI-3 the extended bde count is 1225 * explicitly reinitialized since all iocb memory resources are reused. 1226 */ 1227 if (phba->sli_rev == 3 && 1228 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) && 1229 !(iocbq->iocb_flag & DSS_SECURITY_OP)) { 1230 if (num_bde > LPFC_EXT_DATA_BDE_COUNT) { 1231 /* 1232 * The extended IOCB format can only fit 3 BDE or a BPL. 1233 * This I/O has more than 3 BDE so the 1st data bde will 1234 * be a BPL that is filled in here. 1235 */ 1236 physaddr = lpfc_cmd->dma_handle; 1237 data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64; 1238 data_bde->tus.f.bdeSize = (num_bde * 1239 sizeof(struct ulp_bde64)); 1240 physaddr += (sizeof(struct fcp_cmnd) + 1241 sizeof(struct fcp_rsp) + 1242 (2 * sizeof(struct ulp_bde64))); 1243 data_bde->addrHigh = putPaddrHigh(physaddr); 1244 data_bde->addrLow = putPaddrLow(physaddr); 1245 /* ebde count includes the response bde and data bpl */ 1246 iocb_cmd->unsli3.fcp_ext.ebde_count = 2; 1247 } else { 1248 /* ebde count includes the response bde and data bdes */ 1249 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1); 1250 } 1251 } else { 1252 iocb_cmd->un.fcpi64.bdl.bdeSize = 1253 ((num_bde + 2) * sizeof(struct ulp_bde64)); 1254 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1); 1255 } 1256 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd)); 1257 1258 /* 1259 * Due to difference in data length between DIF/non-DIF paths, 1260 * we need to set word 4 of IOCB here 1261 */ 1262 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd); 1263 return 0; 1264 } 1265 1266 /* 1267 * Given a scsi cmnd, determine the BlockGuard opcodes to be used with it 1268 * @sc: The SCSI command to examine 1269 * @txopt: (out) BlockGuard operation for transmitted data 1270 * @rxopt: (out) BlockGuard operation for received data 1271 * 1272 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined 1273 * 1274 */ 1275 static int 1276 lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1277 uint8_t *txop, uint8_t *rxop) 1278 { 1279 uint8_t guard_type = scsi_host_get_guard(sc->device->host); 1280 uint8_t ret = 0; 1281 1282 if (guard_type == SHOST_DIX_GUARD_IP) { 1283 switch (scsi_get_prot_op(sc)) { 1284 case SCSI_PROT_READ_INSERT: 1285 case SCSI_PROT_WRITE_STRIP: 1286 *txop = BG_OP_IN_CSUM_OUT_NODIF; 1287 *rxop = BG_OP_IN_NODIF_OUT_CSUM; 1288 break; 1289 1290 case SCSI_PROT_READ_STRIP: 1291 case SCSI_PROT_WRITE_INSERT: 1292 *txop = BG_OP_IN_NODIF_OUT_CRC; 1293 *rxop = BG_OP_IN_CRC_OUT_NODIF; 1294 break; 1295 1296 case SCSI_PROT_READ_PASS: 1297 case SCSI_PROT_WRITE_PASS: 1298 *txop = BG_OP_IN_CSUM_OUT_CRC; 1299 *rxop = BG_OP_IN_CRC_OUT_CSUM; 1300 break; 1301 1302 case SCSI_PROT_NORMAL: 1303 default: 1304 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1305 "9063 BLKGRD: Bad op/guard:%d/%d combination\n", 1306 scsi_get_prot_op(sc), guard_type); 1307 ret = 1; 1308 break; 1309 1310 } 1311 } else if (guard_type == SHOST_DIX_GUARD_CRC) { 1312 switch (scsi_get_prot_op(sc)) { 1313 case SCSI_PROT_READ_STRIP: 1314 case SCSI_PROT_WRITE_INSERT: 1315 *txop = BG_OP_IN_NODIF_OUT_CRC; 1316 *rxop = BG_OP_IN_CRC_OUT_NODIF; 1317 break; 1318 1319 case SCSI_PROT_READ_PASS: 1320 case SCSI_PROT_WRITE_PASS: 1321 *txop = BG_OP_IN_CRC_OUT_CRC; 1322 *rxop = BG_OP_IN_CRC_OUT_CRC; 1323 break; 1324 1325 case SCSI_PROT_READ_INSERT: 1326 case SCSI_PROT_WRITE_STRIP: 1327 case SCSI_PROT_NORMAL: 1328 default: 1329 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1330 "9075 BLKGRD: Bad op/guard:%d/%d combination\n", 1331 scsi_get_prot_op(sc), guard_type); 1332 ret = 1; 1333 break; 1334 } 1335 } else { 1336 /* unsupported format */ 1337 BUG(); 1338 } 1339 1340 return ret; 1341 } 1342 1343 struct scsi_dif_tuple { 1344 __be16 guard_tag; /* Checksum */ 1345 __be16 app_tag; /* Opaque storage */ 1346 __be32 ref_tag; /* Target LBA or indirect LBA */ 1347 }; 1348 1349 static inline unsigned 1350 lpfc_cmd_blksize(struct scsi_cmnd *sc) 1351 { 1352 return sc->device->sector_size; 1353 } 1354 1355 /** 1356 * lpfc_get_cmd_dif_parms - Extract DIF parameters from SCSI command 1357 * @sc: in: SCSI command 1358 * @apptagmask: out: app tag mask 1359 * @apptagval: out: app tag value 1360 * @reftag: out: ref tag (reference tag) 1361 * 1362 * Description: 1363 * Extract DIF parameters from the command if possible. Otherwise, 1364 * use default parameters. 1365 * 1366 **/ 1367 static inline void 1368 lpfc_get_cmd_dif_parms(struct scsi_cmnd *sc, uint16_t *apptagmask, 1369 uint16_t *apptagval, uint32_t *reftag) 1370 { 1371 struct scsi_dif_tuple *spt; 1372 unsigned char op = scsi_get_prot_op(sc); 1373 unsigned int protcnt = scsi_prot_sg_count(sc); 1374 static int cnt; 1375 1376 if (protcnt && (op == SCSI_PROT_WRITE_STRIP || 1377 op == SCSI_PROT_WRITE_PASS)) { 1378 1379 cnt++; 1380 spt = page_address(sg_page(scsi_prot_sglist(sc))) + 1381 scsi_prot_sglist(sc)[0].offset; 1382 *apptagmask = 0; 1383 *apptagval = 0; 1384 *reftag = cpu_to_be32(spt->ref_tag); 1385 1386 } else { 1387 /* SBC defines ref tag to be lower 32bits of LBA */ 1388 *reftag = (uint32_t) (0xffffffff & scsi_get_lba(sc)); 1389 *apptagmask = 0; 1390 *apptagval = 0; 1391 } 1392 } 1393 1394 /* 1395 * This function sets up buffer list for protection groups of 1396 * type LPFC_PG_TYPE_NO_DIF 1397 * 1398 * This is usually used when the HBA is instructed to generate 1399 * DIFs and insert them into data stream (or strip DIF from 1400 * incoming data stream) 1401 * 1402 * The buffer list consists of just one protection group described 1403 * below: 1404 * +-------------------------+ 1405 * start of prot group --> | PDE_5 | 1406 * +-------------------------+ 1407 * | PDE_6 | 1408 * +-------------------------+ 1409 * | Data BDE | 1410 * +-------------------------+ 1411 * |more Data BDE's ... (opt)| 1412 * +-------------------------+ 1413 * 1414 * @sc: pointer to scsi command we're working on 1415 * @bpl: pointer to buffer list for protection groups 1416 * @datacnt: number of segments of data that have been dma mapped 1417 * 1418 * Note: Data s/g buffers have been dma mapped 1419 */ 1420 static int 1421 lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1422 struct ulp_bde64 *bpl, int datasegcnt) 1423 { 1424 struct scatterlist *sgde = NULL; /* s/g data entry */ 1425 struct lpfc_pde5 *pde5 = NULL; 1426 struct lpfc_pde6 *pde6 = NULL; 1427 dma_addr_t physaddr; 1428 int i = 0, num_bde = 0, status; 1429 int datadir = sc->sc_data_direction; 1430 unsigned blksize; 1431 uint32_t reftag; 1432 uint16_t apptagmask, apptagval; 1433 uint8_t txop, rxop; 1434 1435 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); 1436 if (status) 1437 goto out; 1438 1439 /* extract some info from the scsi command for pde*/ 1440 blksize = lpfc_cmd_blksize(sc); 1441 lpfc_get_cmd_dif_parms(sc, &apptagmask, &apptagval, &reftag); 1442 1443 /* setup PDE5 with what we have */ 1444 pde5 = (struct lpfc_pde5 *) bpl; 1445 memset(pde5, 0, sizeof(struct lpfc_pde5)); 1446 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR); 1447 pde5->reftag = reftag; 1448 1449 /* Endianness conversion if necessary for PDE5 */ 1450 pde5->word0 = cpu_to_le32(pde5->word0); 1451 pde5->reftag = cpu_to_le32(pde5->reftag); 1452 1453 /* advance bpl and increment bde count */ 1454 num_bde++; 1455 bpl++; 1456 pde6 = (struct lpfc_pde6 *) bpl; 1457 1458 /* setup PDE6 with the rest of the info */ 1459 memset(pde6, 0, sizeof(struct lpfc_pde6)); 1460 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR); 1461 bf_set(pde6_optx, pde6, txop); 1462 bf_set(pde6_oprx, pde6, rxop); 1463 if (datadir == DMA_FROM_DEVICE) { 1464 bf_set(pde6_ce, pde6, 1); 1465 bf_set(pde6_re, pde6, 1); 1466 bf_set(pde6_ae, pde6, 1); 1467 } 1468 bf_set(pde6_ai, pde6, 1); 1469 bf_set(pde6_apptagval, pde6, apptagval); 1470 1471 /* Endianness conversion if necessary for PDE6 */ 1472 pde6->word0 = cpu_to_le32(pde6->word0); 1473 pde6->word1 = cpu_to_le32(pde6->word1); 1474 pde6->word2 = cpu_to_le32(pde6->word2); 1475 1476 /* advance bpl and increment bde count */ 1477 num_bde++; 1478 bpl++; 1479 1480 /* assumption: caller has already run dma_map_sg on command data */ 1481 scsi_for_each_sg(sc, sgde, datasegcnt, i) { 1482 physaddr = sg_dma_address(sgde); 1483 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr)); 1484 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr)); 1485 bpl->tus.f.bdeSize = sg_dma_len(sgde); 1486 if (datadir == DMA_TO_DEVICE) 1487 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 1488 else 1489 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I; 1490 bpl->tus.w = le32_to_cpu(bpl->tus.w); 1491 bpl++; 1492 num_bde++; 1493 } 1494 1495 out: 1496 return num_bde; 1497 } 1498 1499 /* 1500 * This function sets up buffer list for protection groups of 1501 * type LPFC_PG_TYPE_DIF_BUF 1502 * 1503 * This is usually used when DIFs are in their own buffers, 1504 * separate from the data. The HBA can then by instructed 1505 * to place the DIFs in the outgoing stream. For read operations, 1506 * The HBA could extract the DIFs and place it in DIF buffers. 1507 * 1508 * The buffer list for this type consists of one or more of the 1509 * protection groups described below: 1510 * +-------------------------+ 1511 * start of first prot group --> | PDE_5 | 1512 * +-------------------------+ 1513 * | PDE_6 | 1514 * +-------------------------+ 1515 * | PDE_7 (Prot BDE) | 1516 * +-------------------------+ 1517 * | Data BDE | 1518 * +-------------------------+ 1519 * |more Data BDE's ... (opt)| 1520 * +-------------------------+ 1521 * start of new prot group --> | PDE_5 | 1522 * +-------------------------+ 1523 * | ... | 1524 * +-------------------------+ 1525 * 1526 * @sc: pointer to scsi command we're working on 1527 * @bpl: pointer to buffer list for protection groups 1528 * @datacnt: number of segments of data that have been dma mapped 1529 * @protcnt: number of segment of protection data that have been dma mapped 1530 * 1531 * Note: It is assumed that both data and protection s/g buffers have been 1532 * mapped for DMA 1533 */ 1534 static int 1535 lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1536 struct ulp_bde64 *bpl, int datacnt, int protcnt) 1537 { 1538 struct scatterlist *sgde = NULL; /* s/g data entry */ 1539 struct scatterlist *sgpe = NULL; /* s/g prot entry */ 1540 struct lpfc_pde5 *pde5 = NULL; 1541 struct lpfc_pde6 *pde6 = NULL; 1542 struct lpfc_pde7 *pde7 = NULL; 1543 dma_addr_t dataphysaddr, protphysaddr; 1544 unsigned short curr_data = 0, curr_prot = 0; 1545 unsigned int split_offset; 1546 unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder; 1547 unsigned int protgrp_blks, protgrp_bytes; 1548 unsigned int remainder, subtotal; 1549 int status; 1550 int datadir = sc->sc_data_direction; 1551 unsigned char pgdone = 0, alldone = 0; 1552 unsigned blksize; 1553 uint32_t reftag; 1554 uint16_t apptagmask, apptagval; 1555 uint8_t txop, rxop; 1556 int num_bde = 0; 1557 1558 sgpe = scsi_prot_sglist(sc); 1559 sgde = scsi_sglist(sc); 1560 1561 if (!sgpe || !sgde) { 1562 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 1563 "9020 Invalid s/g entry: data=0x%p prot=0x%p\n", 1564 sgpe, sgde); 1565 return 0; 1566 } 1567 1568 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); 1569 if (status) 1570 goto out; 1571 1572 /* extract some info from the scsi command */ 1573 blksize = lpfc_cmd_blksize(sc); 1574 lpfc_get_cmd_dif_parms(sc, &apptagmask, &apptagval, &reftag); 1575 1576 split_offset = 0; 1577 do { 1578 /* setup PDE5 with what we have */ 1579 pde5 = (struct lpfc_pde5 *) bpl; 1580 memset(pde5, 0, sizeof(struct lpfc_pde5)); 1581 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR); 1582 pde5->reftag = reftag; 1583 1584 /* Endianness conversion if necessary for PDE5 */ 1585 pde5->word0 = cpu_to_le32(pde5->word0); 1586 pde5->reftag = cpu_to_le32(pde5->reftag); 1587 1588 /* advance bpl and increment bde count */ 1589 num_bde++; 1590 bpl++; 1591 pde6 = (struct lpfc_pde6 *) bpl; 1592 1593 /* setup PDE6 with the rest of the info */ 1594 memset(pde6, 0, sizeof(struct lpfc_pde6)); 1595 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR); 1596 bf_set(pde6_optx, pde6, txop); 1597 bf_set(pde6_oprx, pde6, rxop); 1598 bf_set(pde6_ce, pde6, 1); 1599 bf_set(pde6_re, pde6, 1); 1600 bf_set(pde6_ae, pde6, 1); 1601 bf_set(pde6_ai, pde6, 1); 1602 bf_set(pde6_apptagval, pde6, apptagval); 1603 1604 /* Endianness conversion if necessary for PDE6 */ 1605 pde6->word0 = cpu_to_le32(pde6->word0); 1606 pde6->word1 = cpu_to_le32(pde6->word1); 1607 pde6->word2 = cpu_to_le32(pde6->word2); 1608 1609 /* advance bpl and increment bde count */ 1610 num_bde++; 1611 bpl++; 1612 1613 /* setup the first BDE that points to protection buffer */ 1614 protphysaddr = sg_dma_address(sgpe) + protgroup_offset; 1615 protgroup_len = sg_dma_len(sgpe) - protgroup_offset; 1616 1617 /* must be integer multiple of the DIF block length */ 1618 BUG_ON(protgroup_len % 8); 1619 1620 pde7 = (struct lpfc_pde7 *) bpl; 1621 memset(pde7, 0, sizeof(struct lpfc_pde7)); 1622 bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR); 1623 1624 pde7->addrHigh = le32_to_cpu(putPaddrLow(protphysaddr)); 1625 pde7->addrLow = le32_to_cpu(putPaddrHigh(protphysaddr)); 1626 1627 protgrp_blks = protgroup_len / 8; 1628 protgrp_bytes = protgrp_blks * blksize; 1629 1630 /* check if this pde is crossing the 4K boundary; if so split */ 1631 if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) { 1632 protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff); 1633 protgroup_offset += protgroup_remainder; 1634 protgrp_blks = protgroup_remainder / 8; 1635 protgrp_bytes = protgroup_remainder * blksize; 1636 } else { 1637 protgroup_offset = 0; 1638 curr_prot++; 1639 } 1640 1641 num_bde++; 1642 1643 /* setup BDE's for data blocks associated with DIF data */ 1644 pgdone = 0; 1645 subtotal = 0; /* total bytes processed for current prot grp */ 1646 while (!pgdone) { 1647 if (!sgde) { 1648 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1649 "9065 BLKGRD:%s Invalid data segment\n", 1650 __func__); 1651 return 0; 1652 } 1653 bpl++; 1654 dataphysaddr = sg_dma_address(sgde) + split_offset; 1655 bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr)); 1656 bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr)); 1657 1658 remainder = sg_dma_len(sgde) - split_offset; 1659 1660 if ((subtotal + remainder) <= protgrp_bytes) { 1661 /* we can use this whole buffer */ 1662 bpl->tus.f.bdeSize = remainder; 1663 split_offset = 0; 1664 1665 if ((subtotal + remainder) == protgrp_bytes) 1666 pgdone = 1; 1667 } else { 1668 /* must split this buffer with next prot grp */ 1669 bpl->tus.f.bdeSize = protgrp_bytes - subtotal; 1670 split_offset += bpl->tus.f.bdeSize; 1671 } 1672 1673 subtotal += bpl->tus.f.bdeSize; 1674 1675 if (datadir == DMA_TO_DEVICE) 1676 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 1677 else 1678 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I; 1679 bpl->tus.w = le32_to_cpu(bpl->tus.w); 1680 1681 num_bde++; 1682 curr_data++; 1683 1684 if (split_offset) 1685 break; 1686 1687 /* Move to the next s/g segment if possible */ 1688 sgde = sg_next(sgde); 1689 1690 } 1691 1692 if (protgroup_offset) { 1693 /* update the reference tag */ 1694 reftag += protgrp_blks; 1695 bpl++; 1696 continue; 1697 } 1698 1699 /* are we done ? */ 1700 if (curr_prot == protcnt) { 1701 alldone = 1; 1702 } else if (curr_prot < protcnt) { 1703 /* advance to next prot buffer */ 1704 sgpe = sg_next(sgpe); 1705 bpl++; 1706 1707 /* update the reference tag */ 1708 reftag += protgrp_blks; 1709 } else { 1710 /* if we're here, we have a bug */ 1711 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1712 "9054 BLKGRD: bug in %s\n", __func__); 1713 } 1714 1715 } while (!alldone); 1716 1717 out: 1718 1719 return num_bde; 1720 } 1721 1722 /* 1723 * Given a SCSI command that supports DIF, determine composition of protection 1724 * groups involved in setting up buffer lists 1725 * 1726 * Returns: 1727 * for DIF (for both read and write) 1728 * */ 1729 static int 1730 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc) 1731 { 1732 int ret = LPFC_PG_TYPE_INVALID; 1733 unsigned char op = scsi_get_prot_op(sc); 1734 1735 switch (op) { 1736 case SCSI_PROT_READ_STRIP: 1737 case SCSI_PROT_WRITE_INSERT: 1738 ret = LPFC_PG_TYPE_NO_DIF; 1739 break; 1740 case SCSI_PROT_READ_INSERT: 1741 case SCSI_PROT_WRITE_STRIP: 1742 case SCSI_PROT_READ_PASS: 1743 case SCSI_PROT_WRITE_PASS: 1744 ret = LPFC_PG_TYPE_DIF_BUF; 1745 break; 1746 default: 1747 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 1748 "9021 Unsupported protection op:%d\n", op); 1749 break; 1750 } 1751 1752 return ret; 1753 } 1754 1755 /* 1756 * This is the protection/DIF aware version of 1757 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the 1758 * two functions eventually, but for now, it's here 1759 */ 1760 static int 1761 lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba, 1762 struct lpfc_scsi_buf *lpfc_cmd) 1763 { 1764 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 1765 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 1766 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl; 1767 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 1768 uint32_t num_bde = 0; 1769 int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction; 1770 int prot_group_type = 0; 1771 int diflen, fcpdl; 1772 unsigned blksize; 1773 1774 /* 1775 * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd 1776 * fcp_rsp regions to the first data bde entry 1777 */ 1778 bpl += 2; 1779 if (scsi_sg_count(scsi_cmnd)) { 1780 /* 1781 * The driver stores the segment count returned from pci_map_sg 1782 * because this a count of dma-mappings used to map the use_sg 1783 * pages. They are not guaranteed to be the same for those 1784 * architectures that implement an IOMMU. 1785 */ 1786 datasegcnt = dma_map_sg(&phba->pcidev->dev, 1787 scsi_sglist(scsi_cmnd), 1788 scsi_sg_count(scsi_cmnd), datadir); 1789 if (unlikely(!datasegcnt)) 1790 return 1; 1791 1792 lpfc_cmd->seg_cnt = datasegcnt; 1793 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { 1794 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1795 "9067 BLKGRD: %s: Too many sg segments" 1796 " from dma_map_sg. Config %d, seg_cnt" 1797 " %d\n", 1798 __func__, phba->cfg_sg_seg_cnt, 1799 lpfc_cmd->seg_cnt); 1800 scsi_dma_unmap(scsi_cmnd); 1801 return 1; 1802 } 1803 1804 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd); 1805 1806 switch (prot_group_type) { 1807 case LPFC_PG_TYPE_NO_DIF: 1808 num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl, 1809 datasegcnt); 1810 /* we should have 2 or more entries in buffer list */ 1811 if (num_bde < 2) 1812 goto err; 1813 break; 1814 case LPFC_PG_TYPE_DIF_BUF:{ 1815 /* 1816 * This type indicates that protection buffers are 1817 * passed to the driver, so that needs to be prepared 1818 * for DMA 1819 */ 1820 protsegcnt = dma_map_sg(&phba->pcidev->dev, 1821 scsi_prot_sglist(scsi_cmnd), 1822 scsi_prot_sg_count(scsi_cmnd), datadir); 1823 if (unlikely(!protsegcnt)) { 1824 scsi_dma_unmap(scsi_cmnd); 1825 return 1; 1826 } 1827 1828 lpfc_cmd->prot_seg_cnt = protsegcnt; 1829 if (lpfc_cmd->prot_seg_cnt 1830 > phba->cfg_prot_sg_seg_cnt) { 1831 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1832 "9068 BLKGRD: %s: Too many prot sg " 1833 "segments from dma_map_sg. Config %d," 1834 "prot_seg_cnt %d\n", __func__, 1835 phba->cfg_prot_sg_seg_cnt, 1836 lpfc_cmd->prot_seg_cnt); 1837 dma_unmap_sg(&phba->pcidev->dev, 1838 scsi_prot_sglist(scsi_cmnd), 1839 scsi_prot_sg_count(scsi_cmnd), 1840 datadir); 1841 scsi_dma_unmap(scsi_cmnd); 1842 return 1; 1843 } 1844 1845 num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl, 1846 datasegcnt, protsegcnt); 1847 /* we should have 3 or more entries in buffer list */ 1848 if (num_bde < 3) 1849 goto err; 1850 break; 1851 } 1852 case LPFC_PG_TYPE_INVALID: 1853 default: 1854 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 1855 "9022 Unexpected protection group %i\n", 1856 prot_group_type); 1857 return 1; 1858 } 1859 } 1860 1861 /* 1862 * Finish initializing those IOCB fields that are dependent on the 1863 * scsi_cmnd request_buffer. Note that the bdeSize is explicitly 1864 * reinitialized since all iocb memory resources are used many times 1865 * for transmit, receive, and continuation bpl's. 1866 */ 1867 iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64)); 1868 iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64)); 1869 iocb_cmd->ulpBdeCount = 1; 1870 iocb_cmd->ulpLe = 1; 1871 1872 fcpdl = scsi_bufflen(scsi_cmnd); 1873 1874 if (scsi_get_prot_type(scsi_cmnd) == SCSI_PROT_DIF_TYPE1) { 1875 /* 1876 * We are in DIF Type 1 mode 1877 * Every data block has a 8 byte DIF (trailer) 1878 * attached to it. Must ajust FCP data length 1879 */ 1880 blksize = lpfc_cmd_blksize(scsi_cmnd); 1881 diflen = (fcpdl / blksize) * 8; 1882 fcpdl += diflen; 1883 } 1884 fcp_cmnd->fcpDl = be32_to_cpu(fcpdl); 1885 1886 /* 1887 * Due to difference in data length between DIF/non-DIF paths, 1888 * we need to set word 4 of IOCB here 1889 */ 1890 iocb_cmd->un.fcpi.fcpi_parm = fcpdl; 1891 1892 return 0; 1893 err: 1894 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 1895 "9023 Could not setup all needed BDE's" 1896 "prot_group_type=%d, num_bde=%d\n", 1897 prot_group_type, num_bde); 1898 return 1; 1899 } 1900 1901 /* 1902 * This function checks for BlockGuard errors detected by 1903 * the HBA. In case of errors, the ASC/ASCQ fields in the 1904 * sense buffer will be set accordingly, paired with 1905 * ILLEGAL_REQUEST to signal to the kernel that the HBA 1906 * detected corruption. 1907 * 1908 * Returns: 1909 * 0 - No error found 1910 * 1 - BlockGuard error found 1911 * -1 - Internal error (bad profile, ...etc) 1912 */ 1913 static int 1914 lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd, 1915 struct lpfc_iocbq *pIocbOut) 1916 { 1917 struct scsi_cmnd *cmd = lpfc_cmd->pCmd; 1918 struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg; 1919 int ret = 0; 1920 uint32_t bghm = bgf->bghm; 1921 uint32_t bgstat = bgf->bgstat; 1922 uint64_t failing_sector = 0; 1923 1924 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9069 BLKGRD: BG ERROR in cmd" 1925 " 0x%x lba 0x%llx blk cnt 0x%x " 1926 "bgstat=0x%x bghm=0x%x\n", 1927 cmd->cmnd[0], (unsigned long long)scsi_get_lba(cmd), 1928 blk_rq_sectors(cmd->request), bgstat, bghm); 1929 1930 spin_lock(&_dump_buf_lock); 1931 if (!_dump_buf_done) { 1932 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9070 BLKGRD: Saving" 1933 " Data for %u blocks to debugfs\n", 1934 (cmd->cmnd[7] << 8 | cmd->cmnd[8])); 1935 lpfc_debug_save_data(phba, cmd); 1936 1937 /* If we have a prot sgl, save the DIF buffer */ 1938 if (lpfc_prot_group_type(phba, cmd) == 1939 LPFC_PG_TYPE_DIF_BUF) { 1940 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9071 BLKGRD: " 1941 "Saving DIF for %u blocks to debugfs\n", 1942 (cmd->cmnd[7] << 8 | cmd->cmnd[8])); 1943 lpfc_debug_save_dif(phba, cmd); 1944 } 1945 1946 _dump_buf_done = 1; 1947 } 1948 spin_unlock(&_dump_buf_lock); 1949 1950 if (lpfc_bgs_get_invalid_prof(bgstat)) { 1951 cmd->result = ScsiResult(DID_ERROR, 0); 1952 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9072 BLKGRD: Invalid" 1953 " BlockGuard profile. bgstat:0x%x\n", 1954 bgstat); 1955 ret = (-1); 1956 goto out; 1957 } 1958 1959 if (lpfc_bgs_get_uninit_dif_block(bgstat)) { 1960 cmd->result = ScsiResult(DID_ERROR, 0); 1961 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9073 BLKGRD: " 1962 "Invalid BlockGuard DIF Block. bgstat:0x%x\n", 1963 bgstat); 1964 ret = (-1); 1965 goto out; 1966 } 1967 1968 if (lpfc_bgs_get_guard_err(bgstat)) { 1969 ret = 1; 1970 1971 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 1972 0x10, 0x1); 1973 cmd->result = DRIVER_SENSE << 24 1974 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 1975 phba->bg_guard_err_cnt++; 1976 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1977 "9055 BLKGRD: guard_tag error\n"); 1978 } 1979 1980 if (lpfc_bgs_get_reftag_err(bgstat)) { 1981 ret = 1; 1982 1983 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 1984 0x10, 0x3); 1985 cmd->result = DRIVER_SENSE << 24 1986 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 1987 1988 phba->bg_reftag_err_cnt++; 1989 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1990 "9056 BLKGRD: ref_tag error\n"); 1991 } 1992 1993 if (lpfc_bgs_get_apptag_err(bgstat)) { 1994 ret = 1; 1995 1996 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 1997 0x10, 0x2); 1998 cmd->result = DRIVER_SENSE << 24 1999 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 2000 2001 phba->bg_apptag_err_cnt++; 2002 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2003 "9061 BLKGRD: app_tag error\n"); 2004 } 2005 2006 if (lpfc_bgs_get_hi_water_mark_present(bgstat)) { 2007 /* 2008 * setup sense data descriptor 0 per SPC-4 as an information 2009 * field, and put the failing LBA in it 2010 */ 2011 cmd->sense_buffer[8] = 0; /* Information */ 2012 cmd->sense_buffer[9] = 0xa; /* Add. length */ 2013 bghm /= cmd->device->sector_size; 2014 2015 failing_sector = scsi_get_lba(cmd); 2016 failing_sector += bghm; 2017 2018 put_unaligned_be64(failing_sector, &cmd->sense_buffer[10]); 2019 } 2020 2021 if (!ret) { 2022 /* No error was reported - problem in FW? */ 2023 cmd->result = ScsiResult(DID_ERROR, 0); 2024 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2025 "9057 BLKGRD: no errors reported!\n"); 2026 } 2027 2028 out: 2029 return ret; 2030 } 2031 2032 /** 2033 * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec 2034 * @phba: The Hba for which this call is being executed. 2035 * @lpfc_cmd: The scsi buffer which is going to be mapped. 2036 * 2037 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd 2038 * field of @lpfc_cmd for device with SLI-4 interface spec. 2039 * 2040 * Return codes: 2041 * 1 - Error 2042 * 0 - Success 2043 **/ 2044 static int 2045 lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 2046 { 2047 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 2048 struct scatterlist *sgel = NULL; 2049 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 2050 struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl; 2051 struct sli4_sge *first_data_sgl; 2052 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 2053 dma_addr_t physaddr; 2054 uint32_t num_bde = 0; 2055 uint32_t dma_len; 2056 uint32_t dma_offset = 0; 2057 int nseg; 2058 struct ulp_bde64 *bde; 2059 2060 /* 2061 * There are three possibilities here - use scatter-gather segment, use 2062 * the single mapping, or neither. Start the lpfc command prep by 2063 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first 2064 * data bde entry. 2065 */ 2066 if (scsi_sg_count(scsi_cmnd)) { 2067 /* 2068 * The driver stores the segment count returned from pci_map_sg 2069 * because this a count of dma-mappings used to map the use_sg 2070 * pages. They are not guaranteed to be the same for those 2071 * architectures that implement an IOMMU. 2072 */ 2073 2074 nseg = scsi_dma_map(scsi_cmnd); 2075 if (unlikely(!nseg)) 2076 return 1; 2077 sgl += 1; 2078 /* clear the last flag in the fcp_rsp map entry */ 2079 sgl->word2 = le32_to_cpu(sgl->word2); 2080 bf_set(lpfc_sli4_sge_last, sgl, 0); 2081 sgl->word2 = cpu_to_le32(sgl->word2); 2082 sgl += 1; 2083 first_data_sgl = sgl; 2084 lpfc_cmd->seg_cnt = nseg; 2085 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { 2086 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:" 2087 " %s: Too many sg segments from " 2088 "dma_map_sg. Config %d, seg_cnt %d\n", 2089 __func__, phba->cfg_sg_seg_cnt, 2090 lpfc_cmd->seg_cnt); 2091 scsi_dma_unmap(scsi_cmnd); 2092 return 1; 2093 } 2094 2095 /* 2096 * The driver established a maximum scatter-gather segment count 2097 * during probe that limits the number of sg elements in any 2098 * single scsi command. Just run through the seg_cnt and format 2099 * the sge's. 2100 * When using SLI-3 the driver will try to fit all the BDEs into 2101 * the IOCB. If it can't then the BDEs get added to a BPL as it 2102 * does for SLI-2 mode. 2103 */ 2104 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) { 2105 physaddr = sg_dma_address(sgel); 2106 dma_len = sg_dma_len(sgel); 2107 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr)); 2108 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr)); 2109 sgl->word2 = le32_to_cpu(sgl->word2); 2110 if ((num_bde + 1) == nseg) 2111 bf_set(lpfc_sli4_sge_last, sgl, 1); 2112 else 2113 bf_set(lpfc_sli4_sge_last, sgl, 0); 2114 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset); 2115 sgl->word2 = cpu_to_le32(sgl->word2); 2116 sgl->sge_len = cpu_to_le32(dma_len); 2117 dma_offset += dma_len; 2118 sgl++; 2119 } 2120 /* setup the performance hint (first data BDE) if enabled */ 2121 if (phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) { 2122 bde = (struct ulp_bde64 *) 2123 &(iocb_cmd->unsli3.sli3Words[5]); 2124 bde->addrLow = first_data_sgl->addr_lo; 2125 bde->addrHigh = first_data_sgl->addr_hi; 2126 bde->tus.f.bdeSize = 2127 le32_to_cpu(first_data_sgl->sge_len); 2128 bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 2129 bde->tus.w = cpu_to_le32(bde->tus.w); 2130 } 2131 } else { 2132 sgl += 1; 2133 /* clear the last flag in the fcp_rsp map entry */ 2134 sgl->word2 = le32_to_cpu(sgl->word2); 2135 bf_set(lpfc_sli4_sge_last, sgl, 1); 2136 sgl->word2 = cpu_to_le32(sgl->word2); 2137 } 2138 2139 /* 2140 * Finish initializing those IOCB fields that are dependent on the 2141 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is 2142 * explicitly reinitialized. 2143 * all iocb memory resources are reused. 2144 */ 2145 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd)); 2146 2147 /* 2148 * Due to difference in data length between DIF/non-DIF paths, 2149 * we need to set word 4 of IOCB here 2150 */ 2151 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd); 2152 return 0; 2153 } 2154 2155 /** 2156 * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer 2157 * @phba: The Hba for which this call is being executed. 2158 * @lpfc_cmd: The scsi buffer which is going to be mapped. 2159 * 2160 * This routine wraps the actual DMA mapping function pointer from the 2161 * lpfc_hba struct. 2162 * 2163 * Return codes: 2164 * 1 - Error 2165 * 0 - Success 2166 **/ 2167 static inline int 2168 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 2169 { 2170 return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd); 2171 } 2172 2173 /** 2174 * lpfc_send_scsi_error_event - Posts an event when there is SCSI error 2175 * @phba: Pointer to hba context object. 2176 * @vport: Pointer to vport object. 2177 * @lpfc_cmd: Pointer to lpfc scsi command which reported the error. 2178 * @rsp_iocb: Pointer to response iocb object which reported error. 2179 * 2180 * This function posts an event when there is a SCSI command reporting 2181 * error from the scsi device. 2182 **/ 2183 static void 2184 lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport, 2185 struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) { 2186 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd; 2187 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp; 2188 uint32_t resp_info = fcprsp->rspStatus2; 2189 uint32_t scsi_status = fcprsp->rspStatus3; 2190 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm; 2191 struct lpfc_fast_path_event *fast_path_evt = NULL; 2192 struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode; 2193 unsigned long flags; 2194 2195 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 2196 return; 2197 2198 /* If there is queuefull or busy condition send a scsi event */ 2199 if ((cmnd->result == SAM_STAT_TASK_SET_FULL) || 2200 (cmnd->result == SAM_STAT_BUSY)) { 2201 fast_path_evt = lpfc_alloc_fast_evt(phba); 2202 if (!fast_path_evt) 2203 return; 2204 fast_path_evt->un.scsi_evt.event_type = 2205 FC_REG_SCSI_EVENT; 2206 fast_path_evt->un.scsi_evt.subcategory = 2207 (cmnd->result == SAM_STAT_TASK_SET_FULL) ? 2208 LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY; 2209 fast_path_evt->un.scsi_evt.lun = cmnd->device->lun; 2210 memcpy(&fast_path_evt->un.scsi_evt.wwpn, 2211 &pnode->nlp_portname, sizeof(struct lpfc_name)); 2212 memcpy(&fast_path_evt->un.scsi_evt.wwnn, 2213 &pnode->nlp_nodename, sizeof(struct lpfc_name)); 2214 } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen && 2215 ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) { 2216 fast_path_evt = lpfc_alloc_fast_evt(phba); 2217 if (!fast_path_evt) 2218 return; 2219 fast_path_evt->un.check_cond_evt.scsi_event.event_type = 2220 FC_REG_SCSI_EVENT; 2221 fast_path_evt->un.check_cond_evt.scsi_event.subcategory = 2222 LPFC_EVENT_CHECK_COND; 2223 fast_path_evt->un.check_cond_evt.scsi_event.lun = 2224 cmnd->device->lun; 2225 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn, 2226 &pnode->nlp_portname, sizeof(struct lpfc_name)); 2227 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn, 2228 &pnode->nlp_nodename, sizeof(struct lpfc_name)); 2229 fast_path_evt->un.check_cond_evt.sense_key = 2230 cmnd->sense_buffer[2] & 0xf; 2231 fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12]; 2232 fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13]; 2233 } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) && 2234 fcpi_parm && 2235 ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) || 2236 ((scsi_status == SAM_STAT_GOOD) && 2237 !(resp_info & (RESID_UNDER | RESID_OVER))))) { 2238 /* 2239 * If status is good or resid does not match with fcp_param and 2240 * there is valid fcpi_parm, then there is a read_check error 2241 */ 2242 fast_path_evt = lpfc_alloc_fast_evt(phba); 2243 if (!fast_path_evt) 2244 return; 2245 fast_path_evt->un.read_check_error.header.event_type = 2246 FC_REG_FABRIC_EVENT; 2247 fast_path_evt->un.read_check_error.header.subcategory = 2248 LPFC_EVENT_FCPRDCHKERR; 2249 memcpy(&fast_path_evt->un.read_check_error.header.wwpn, 2250 &pnode->nlp_portname, sizeof(struct lpfc_name)); 2251 memcpy(&fast_path_evt->un.read_check_error.header.wwnn, 2252 &pnode->nlp_nodename, sizeof(struct lpfc_name)); 2253 fast_path_evt->un.read_check_error.lun = cmnd->device->lun; 2254 fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0]; 2255 fast_path_evt->un.read_check_error.fcpiparam = 2256 fcpi_parm; 2257 } else 2258 return; 2259 2260 fast_path_evt->vport = vport; 2261 spin_lock_irqsave(&phba->hbalock, flags); 2262 list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list); 2263 spin_unlock_irqrestore(&phba->hbalock, flags); 2264 lpfc_worker_wake_up(phba); 2265 return; 2266 } 2267 2268 /** 2269 * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev 2270 * @phba: The HBA for which this call is being executed. 2271 * @psb: The scsi buffer which is going to be un-mapped. 2272 * 2273 * This routine does DMA un-mapping of scatter gather list of scsi command 2274 * field of @lpfc_cmd for device with SLI-3 interface spec. 2275 **/ 2276 static void 2277 lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 2278 { 2279 /* 2280 * There are only two special cases to consider. (1) the scsi command 2281 * requested scatter-gather usage or (2) the scsi command allocated 2282 * a request buffer, but did not request use_sg. There is a third 2283 * case, but it does not require resource deallocation. 2284 */ 2285 if (psb->seg_cnt > 0) 2286 scsi_dma_unmap(psb->pCmd); 2287 if (psb->prot_seg_cnt > 0) 2288 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd), 2289 scsi_prot_sg_count(psb->pCmd), 2290 psb->pCmd->sc_data_direction); 2291 } 2292 2293 /** 2294 * lpfc_handler_fcp_err - FCP response handler 2295 * @vport: The virtual port for which this call is being executed. 2296 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure. 2297 * @rsp_iocb: The response IOCB which contains FCP error. 2298 * 2299 * This routine is called to process response IOCB with status field 2300 * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command 2301 * based upon SCSI and FCP error. 2302 **/ 2303 static void 2304 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, 2305 struct lpfc_iocbq *rsp_iocb) 2306 { 2307 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd; 2308 struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd; 2309 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp; 2310 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm; 2311 uint32_t resp_info = fcprsp->rspStatus2; 2312 uint32_t scsi_status = fcprsp->rspStatus3; 2313 uint32_t *lp; 2314 uint32_t host_status = DID_OK; 2315 uint32_t rsplen = 0; 2316 uint32_t logit = LOG_FCP | LOG_FCP_ERROR; 2317 2318 2319 /* 2320 * If this is a task management command, there is no 2321 * scsi packet associated with this lpfc_cmd. The driver 2322 * consumes it. 2323 */ 2324 if (fcpcmd->fcpCntl2) { 2325 scsi_status = 0; 2326 goto out; 2327 } 2328 2329 if (resp_info & RSP_LEN_VALID) { 2330 rsplen = be32_to_cpu(fcprsp->rspRspLen); 2331 if (rsplen != 0 && rsplen != 4 && rsplen != 8) { 2332 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 2333 "2719 Invalid response length: " 2334 "tgt x%x lun x%x cmnd x%x rsplen x%x\n", 2335 cmnd->device->id, 2336 cmnd->device->lun, cmnd->cmnd[0], 2337 rsplen); 2338 host_status = DID_ERROR; 2339 goto out; 2340 } 2341 if (fcprsp->rspInfo3 != RSP_NO_FAILURE) { 2342 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 2343 "2757 Protocol failure detected during " 2344 "processing of FCP I/O op: " 2345 "tgt x%x lun x%x cmnd x%x rspInfo3 x%x\n", 2346 cmnd->device->id, 2347 cmnd->device->lun, cmnd->cmnd[0], 2348 fcprsp->rspInfo3); 2349 host_status = DID_ERROR; 2350 goto out; 2351 } 2352 } 2353 2354 if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) { 2355 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen); 2356 if (snslen > SCSI_SENSE_BUFFERSIZE) 2357 snslen = SCSI_SENSE_BUFFERSIZE; 2358 2359 if (resp_info & RSP_LEN_VALID) 2360 rsplen = be32_to_cpu(fcprsp->rspRspLen); 2361 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen); 2362 } 2363 lp = (uint32_t *)cmnd->sense_buffer; 2364 2365 if (!scsi_status && (resp_info & RESID_UNDER)) 2366 logit = LOG_FCP; 2367 2368 lpfc_printf_vlog(vport, KERN_WARNING, logit, 2369 "9024 FCP command x%x failed: x%x SNS x%x x%x " 2370 "Data: x%x x%x x%x x%x x%x\n", 2371 cmnd->cmnd[0], scsi_status, 2372 be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info, 2373 be32_to_cpu(fcprsp->rspResId), 2374 be32_to_cpu(fcprsp->rspSnsLen), 2375 be32_to_cpu(fcprsp->rspRspLen), 2376 fcprsp->rspInfo3); 2377 2378 scsi_set_resid(cmnd, 0); 2379 if (resp_info & RESID_UNDER) { 2380 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId)); 2381 2382 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 2383 "9025 FCP Read Underrun, expected %d, " 2384 "residual %d Data: x%x x%x x%x\n", 2385 be32_to_cpu(fcpcmd->fcpDl), 2386 scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0], 2387 cmnd->underflow); 2388 2389 /* 2390 * If there is an under run check if under run reported by 2391 * storage array is same as the under run reported by HBA. 2392 * If this is not same, there is a dropped frame. 2393 */ 2394 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) && 2395 fcpi_parm && 2396 (scsi_get_resid(cmnd) != fcpi_parm)) { 2397 lpfc_printf_vlog(vport, KERN_WARNING, 2398 LOG_FCP | LOG_FCP_ERROR, 2399 "9026 FCP Read Check Error " 2400 "and Underrun Data: x%x x%x x%x x%x\n", 2401 be32_to_cpu(fcpcmd->fcpDl), 2402 scsi_get_resid(cmnd), fcpi_parm, 2403 cmnd->cmnd[0]); 2404 scsi_set_resid(cmnd, scsi_bufflen(cmnd)); 2405 host_status = DID_ERROR; 2406 } 2407 /* 2408 * The cmnd->underflow is the minimum number of bytes that must 2409 * be transferred for this command. Provided a sense condition 2410 * is not present, make sure the actual amount transferred is at 2411 * least the underflow value or fail. 2412 */ 2413 if (!(resp_info & SNS_LEN_VALID) && 2414 (scsi_status == SAM_STAT_GOOD) && 2415 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) 2416 < cmnd->underflow)) { 2417 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 2418 "9027 FCP command x%x residual " 2419 "underrun converted to error " 2420 "Data: x%x x%x x%x\n", 2421 cmnd->cmnd[0], scsi_bufflen(cmnd), 2422 scsi_get_resid(cmnd), cmnd->underflow); 2423 host_status = DID_ERROR; 2424 } 2425 } else if (resp_info & RESID_OVER) { 2426 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 2427 "9028 FCP command x%x residual overrun error. " 2428 "Data: x%x x%x\n", cmnd->cmnd[0], 2429 scsi_bufflen(cmnd), scsi_get_resid(cmnd)); 2430 host_status = DID_ERROR; 2431 2432 /* 2433 * Check SLI validation that all the transfer was actually done 2434 * (fcpi_parm should be zero). Apply check only to reads. 2435 */ 2436 } else if (fcpi_parm && (cmnd->sc_data_direction == DMA_FROM_DEVICE)) { 2437 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR, 2438 "9029 FCP Read Check Error Data: " 2439 "x%x x%x x%x x%x x%x\n", 2440 be32_to_cpu(fcpcmd->fcpDl), 2441 be32_to_cpu(fcprsp->rspResId), 2442 fcpi_parm, cmnd->cmnd[0], scsi_status); 2443 switch (scsi_status) { 2444 case SAM_STAT_GOOD: 2445 case SAM_STAT_CHECK_CONDITION: 2446 /* Fabric dropped a data frame. Fail any successful 2447 * command in which we detected dropped frames. 2448 * A status of good or some check conditions could 2449 * be considered a successful command. 2450 */ 2451 host_status = DID_ERROR; 2452 break; 2453 } 2454 scsi_set_resid(cmnd, scsi_bufflen(cmnd)); 2455 } 2456 2457 out: 2458 cmnd->result = ScsiResult(host_status, scsi_status); 2459 lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb); 2460 } 2461 2462 /** 2463 * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine 2464 * @phba: The Hba for which this call is being executed. 2465 * @pIocbIn: The command IOCBQ for the scsi cmnd. 2466 * @pIocbOut: The response IOCBQ for the scsi cmnd. 2467 * 2468 * This routine assigns scsi command result by looking into response IOCB 2469 * status field appropriately. This routine handles QUEUE FULL condition as 2470 * well by ramping down device queue depth. 2471 **/ 2472 static void 2473 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, 2474 struct lpfc_iocbq *pIocbOut) 2475 { 2476 struct lpfc_scsi_buf *lpfc_cmd = 2477 (struct lpfc_scsi_buf *) pIocbIn->context1; 2478 struct lpfc_vport *vport = pIocbIn->vport; 2479 struct lpfc_rport_data *rdata = lpfc_cmd->rdata; 2480 struct lpfc_nodelist *pnode = rdata->pnode; 2481 struct scsi_cmnd *cmd; 2482 int result; 2483 struct scsi_device *tmp_sdev; 2484 int depth; 2485 unsigned long flags; 2486 struct lpfc_fast_path_event *fast_path_evt; 2487 struct Scsi_Host *shost; 2488 uint32_t queue_depth, scsi_id; 2489 2490 /* Sanity check on return of outstanding command */ 2491 if (!(lpfc_cmd->pCmd)) 2492 return; 2493 cmd = lpfc_cmd->pCmd; 2494 shost = cmd->device->host; 2495 2496 lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4]; 2497 lpfc_cmd->status = pIocbOut->iocb.ulpStatus; 2498 /* pick up SLI4 exhange busy status from HBA */ 2499 lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY; 2500 2501 if (pnode && NLP_CHK_NODE_ACT(pnode)) 2502 atomic_dec(&pnode->cmd_pending); 2503 2504 if (lpfc_cmd->status) { 2505 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT && 2506 (lpfc_cmd->result & IOERR_DRVR_MASK)) 2507 lpfc_cmd->status = IOSTAT_DRIVER_REJECT; 2508 else if (lpfc_cmd->status >= IOSTAT_CNT) 2509 lpfc_cmd->status = IOSTAT_DEFAULT; 2510 2511 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 2512 "9030 FCP cmd x%x failed <%d/%d> " 2513 "status: x%x result: x%x Data: x%x x%x\n", 2514 cmd->cmnd[0], 2515 cmd->device ? cmd->device->id : 0xffff, 2516 cmd->device ? cmd->device->lun : 0xffff, 2517 lpfc_cmd->status, lpfc_cmd->result, 2518 pIocbOut->iocb.ulpContext, 2519 lpfc_cmd->cur_iocbq.iocb.ulpIoTag); 2520 2521 switch (lpfc_cmd->status) { 2522 case IOSTAT_FCP_RSP_ERROR: 2523 /* Call FCP RSP handler to determine result */ 2524 lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut); 2525 break; 2526 case IOSTAT_NPORT_BSY: 2527 case IOSTAT_FABRIC_BSY: 2528 cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0); 2529 fast_path_evt = lpfc_alloc_fast_evt(phba); 2530 if (!fast_path_evt) 2531 break; 2532 fast_path_evt->un.fabric_evt.event_type = 2533 FC_REG_FABRIC_EVENT; 2534 fast_path_evt->un.fabric_evt.subcategory = 2535 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ? 2536 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY; 2537 if (pnode && NLP_CHK_NODE_ACT(pnode)) { 2538 memcpy(&fast_path_evt->un.fabric_evt.wwpn, 2539 &pnode->nlp_portname, 2540 sizeof(struct lpfc_name)); 2541 memcpy(&fast_path_evt->un.fabric_evt.wwnn, 2542 &pnode->nlp_nodename, 2543 sizeof(struct lpfc_name)); 2544 } 2545 fast_path_evt->vport = vport; 2546 fast_path_evt->work_evt.evt = 2547 LPFC_EVT_FASTPATH_MGMT_EVT; 2548 spin_lock_irqsave(&phba->hbalock, flags); 2549 list_add_tail(&fast_path_evt->work_evt.evt_listp, 2550 &phba->work_list); 2551 spin_unlock_irqrestore(&phba->hbalock, flags); 2552 lpfc_worker_wake_up(phba); 2553 break; 2554 case IOSTAT_LOCAL_REJECT: 2555 case IOSTAT_REMOTE_STOP: 2556 if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR || 2557 lpfc_cmd->result == 2558 IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR || 2559 lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR || 2560 lpfc_cmd->result == 2561 IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) { 2562 cmd->result = ScsiResult(DID_NO_CONNECT, 0); 2563 break; 2564 } 2565 if (lpfc_cmd->result == IOERR_INVALID_RPI || 2566 lpfc_cmd->result == IOERR_NO_RESOURCES || 2567 lpfc_cmd->result == IOERR_ABORT_REQUESTED || 2568 lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) { 2569 cmd->result = ScsiResult(DID_REQUEUE, 0); 2570 break; 2571 } 2572 if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED || 2573 lpfc_cmd->result == IOERR_TX_DMA_FAILED) && 2574 pIocbOut->iocb.unsli3.sli3_bg.bgstat) { 2575 if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) { 2576 /* 2577 * This is a response for a BG enabled 2578 * cmd. Parse BG error 2579 */ 2580 lpfc_parse_bg_err(phba, lpfc_cmd, 2581 pIocbOut); 2582 break; 2583 } else { 2584 lpfc_printf_vlog(vport, KERN_WARNING, 2585 LOG_BG, 2586 "9031 non-zero BGSTAT " 2587 "on unprotected cmd\n"); 2588 } 2589 } 2590 if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP) 2591 && (phba->sli_rev == LPFC_SLI_REV4) 2592 && (pnode && NLP_CHK_NODE_ACT(pnode))) { 2593 /* This IO was aborted by the target, we don't 2594 * know the rxid and because we did not send the 2595 * ABTS we cannot generate and RRQ. 2596 */ 2597 lpfc_set_rrq_active(phba, pnode, 2598 lpfc_cmd->cur_iocbq.sli4_xritag, 2599 0, 0); 2600 } 2601 /* else: fall through */ 2602 default: 2603 cmd->result = ScsiResult(DID_ERROR, 0); 2604 break; 2605 } 2606 2607 if (!pnode || !NLP_CHK_NODE_ACT(pnode) 2608 || (pnode->nlp_state != NLP_STE_MAPPED_NODE)) 2609 cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 2610 SAM_STAT_BUSY); 2611 } else 2612 cmd->result = ScsiResult(DID_OK, 0); 2613 2614 if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) { 2615 uint32_t *lp = (uint32_t *)cmd->sense_buffer; 2616 2617 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 2618 "0710 Iodone <%d/%d> cmd %p, error " 2619 "x%x SNS x%x x%x Data: x%x x%x\n", 2620 cmd->device->id, cmd->device->lun, cmd, 2621 cmd->result, *lp, *(lp + 3), cmd->retries, 2622 scsi_get_resid(cmd)); 2623 } 2624 2625 lpfc_update_stats(phba, lpfc_cmd); 2626 result = cmd->result; 2627 if (vport->cfg_max_scsicmpl_time && 2628 time_after(jiffies, lpfc_cmd->start_time + 2629 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) { 2630 spin_lock_irqsave(shost->host_lock, flags); 2631 if (pnode && NLP_CHK_NODE_ACT(pnode)) { 2632 if (pnode->cmd_qdepth > 2633 atomic_read(&pnode->cmd_pending) && 2634 (atomic_read(&pnode->cmd_pending) > 2635 LPFC_MIN_TGT_QDEPTH) && 2636 ((cmd->cmnd[0] == READ_10) || 2637 (cmd->cmnd[0] == WRITE_10))) 2638 pnode->cmd_qdepth = 2639 atomic_read(&pnode->cmd_pending); 2640 2641 pnode->last_change_time = jiffies; 2642 } 2643 spin_unlock_irqrestore(shost->host_lock, flags); 2644 } else if (pnode && NLP_CHK_NODE_ACT(pnode)) { 2645 if ((pnode->cmd_qdepth < vport->cfg_tgt_queue_depth) && 2646 time_after(jiffies, pnode->last_change_time + 2647 msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) { 2648 spin_lock_irqsave(shost->host_lock, flags); 2649 depth = pnode->cmd_qdepth * LPFC_TGTQ_RAMPUP_PCENT 2650 / 100; 2651 depth = depth ? depth : 1; 2652 pnode->cmd_qdepth += depth; 2653 if (pnode->cmd_qdepth > vport->cfg_tgt_queue_depth) 2654 pnode->cmd_qdepth = vport->cfg_tgt_queue_depth; 2655 pnode->last_change_time = jiffies; 2656 spin_unlock_irqrestore(shost->host_lock, flags); 2657 } 2658 } 2659 2660 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd); 2661 2662 /* The sdev is not guaranteed to be valid post scsi_done upcall. */ 2663 queue_depth = cmd->device->queue_depth; 2664 scsi_id = cmd->device->id; 2665 cmd->scsi_done(cmd); 2666 2667 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 2668 /* 2669 * If there is a thread waiting for command completion 2670 * wake up the thread. 2671 */ 2672 spin_lock_irqsave(shost->host_lock, flags); 2673 lpfc_cmd->pCmd = NULL; 2674 if (lpfc_cmd->waitq) 2675 wake_up(lpfc_cmd->waitq); 2676 spin_unlock_irqrestore(shost->host_lock, flags); 2677 lpfc_release_scsi_buf(phba, lpfc_cmd); 2678 return; 2679 } 2680 2681 if (!result) 2682 lpfc_rampup_queue_depth(vport, queue_depth); 2683 2684 /* 2685 * Check for queue full. If the lun is reporting queue full, then 2686 * back off the lun queue depth to prevent target overloads. 2687 */ 2688 if (result == SAM_STAT_TASK_SET_FULL && pnode && 2689 NLP_CHK_NODE_ACT(pnode)) { 2690 shost_for_each_device(tmp_sdev, shost) { 2691 if (tmp_sdev->id != scsi_id) 2692 continue; 2693 depth = scsi_track_queue_full(tmp_sdev, 2694 tmp_sdev->queue_depth-1); 2695 if (depth <= 0) 2696 continue; 2697 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 2698 "0711 detected queue full - lun queue " 2699 "depth adjusted to %d.\n", depth); 2700 lpfc_send_sdev_queuedepth_change_event(phba, vport, 2701 pnode, 2702 tmp_sdev->lun, 2703 depth+1, depth); 2704 } 2705 } 2706 2707 /* 2708 * If there is a thread waiting for command completion 2709 * wake up the thread. 2710 */ 2711 spin_lock_irqsave(shost->host_lock, flags); 2712 lpfc_cmd->pCmd = NULL; 2713 if (lpfc_cmd->waitq) 2714 wake_up(lpfc_cmd->waitq); 2715 spin_unlock_irqrestore(shost->host_lock, flags); 2716 2717 lpfc_release_scsi_buf(phba, lpfc_cmd); 2718 } 2719 2720 /** 2721 * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB 2722 * @data: A pointer to the immediate command data portion of the IOCB. 2723 * @fcp_cmnd: The FCP Command that is provided by the SCSI layer. 2724 * 2725 * The routine copies the entire FCP command from @fcp_cmnd to @data while 2726 * byte swapping the data to big endian format for transmission on the wire. 2727 **/ 2728 static void 2729 lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd) 2730 { 2731 int i, j; 2732 for (i = 0, j = 0; i < sizeof(struct fcp_cmnd); 2733 i += sizeof(uint32_t), j++) { 2734 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]); 2735 } 2736 } 2737 2738 /** 2739 * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit 2740 * @vport: The virtual port for which this call is being executed. 2741 * @lpfc_cmd: The scsi command which needs to send. 2742 * @pnode: Pointer to lpfc_nodelist. 2743 * 2744 * This routine initializes fcp_cmnd and iocb data structure from scsi command 2745 * to transfer for device with SLI3 interface spec. 2746 **/ 2747 static void 2748 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, 2749 struct lpfc_nodelist *pnode) 2750 { 2751 struct lpfc_hba *phba = vport->phba; 2752 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 2753 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 2754 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 2755 struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq); 2756 int datadir = scsi_cmnd->sc_data_direction; 2757 char tag[2]; 2758 2759 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 2760 return; 2761 2762 lpfc_cmd->fcp_rsp->rspSnsLen = 0; 2763 /* clear task management bits */ 2764 lpfc_cmd->fcp_cmnd->fcpCntl2 = 0; 2765 2766 int_to_scsilun(lpfc_cmd->pCmd->device->lun, 2767 &lpfc_cmd->fcp_cmnd->fcp_lun); 2768 2769 memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16); 2770 2771 if (scsi_populate_tag_msg(scsi_cmnd, tag)) { 2772 switch (tag[0]) { 2773 case HEAD_OF_QUEUE_TAG: 2774 fcp_cmnd->fcpCntl1 = HEAD_OF_Q; 2775 break; 2776 case ORDERED_QUEUE_TAG: 2777 fcp_cmnd->fcpCntl1 = ORDERED_Q; 2778 break; 2779 default: 2780 fcp_cmnd->fcpCntl1 = SIMPLE_Q; 2781 break; 2782 } 2783 } else 2784 fcp_cmnd->fcpCntl1 = 0; 2785 2786 /* 2787 * There are three possibilities here - use scatter-gather segment, use 2788 * the single mapping, or neither. Start the lpfc command prep by 2789 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first 2790 * data bde entry. 2791 */ 2792 if (scsi_sg_count(scsi_cmnd)) { 2793 if (datadir == DMA_TO_DEVICE) { 2794 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR; 2795 if (phba->sli_rev < LPFC_SLI_REV4) { 2796 iocb_cmd->un.fcpi.fcpi_parm = 0; 2797 iocb_cmd->ulpPU = 0; 2798 } else 2799 iocb_cmd->ulpPU = PARM_READ_CHECK; 2800 fcp_cmnd->fcpCntl3 = WRITE_DATA; 2801 phba->fc4OutputRequests++; 2802 } else { 2803 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR; 2804 iocb_cmd->ulpPU = PARM_READ_CHECK; 2805 fcp_cmnd->fcpCntl3 = READ_DATA; 2806 phba->fc4InputRequests++; 2807 } 2808 } else { 2809 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR; 2810 iocb_cmd->un.fcpi.fcpi_parm = 0; 2811 iocb_cmd->ulpPU = 0; 2812 fcp_cmnd->fcpCntl3 = 0; 2813 phba->fc4ControlRequests++; 2814 } 2815 if (phba->sli_rev == 3 && 2816 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) 2817 lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd); 2818 /* 2819 * Finish initializing those IOCB fields that are independent 2820 * of the scsi_cmnd request_buffer 2821 */ 2822 piocbq->iocb.ulpContext = pnode->nlp_rpi; 2823 if (phba->sli_rev == LPFC_SLI_REV4) 2824 piocbq->iocb.ulpContext = 2825 phba->sli4_hba.rpi_ids[pnode->nlp_rpi]; 2826 if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE) 2827 piocbq->iocb.ulpFCP2Rcvy = 1; 2828 else 2829 piocbq->iocb.ulpFCP2Rcvy = 0; 2830 2831 piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f); 2832 piocbq->context1 = lpfc_cmd; 2833 piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl; 2834 piocbq->iocb.ulpTimeout = lpfc_cmd->timeout; 2835 piocbq->vport = vport; 2836 } 2837 2838 /** 2839 * lpfc_scsi_prep_task_mgmt_cmd - Convert SLI3 scsi TM cmd to FCP info unit 2840 * @vport: The virtual port for which this call is being executed. 2841 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure. 2842 * @lun: Logical unit number. 2843 * @task_mgmt_cmd: SCSI task management command. 2844 * 2845 * This routine creates FCP information unit corresponding to @task_mgmt_cmd 2846 * for device with SLI-3 interface spec. 2847 * 2848 * Return codes: 2849 * 0 - Error 2850 * 1 - Success 2851 **/ 2852 static int 2853 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport, 2854 struct lpfc_scsi_buf *lpfc_cmd, 2855 unsigned int lun, 2856 uint8_t task_mgmt_cmd) 2857 { 2858 struct lpfc_iocbq *piocbq; 2859 IOCB_t *piocb; 2860 struct fcp_cmnd *fcp_cmnd; 2861 struct lpfc_rport_data *rdata = lpfc_cmd->rdata; 2862 struct lpfc_nodelist *ndlp = rdata->pnode; 2863 2864 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) || 2865 ndlp->nlp_state != NLP_STE_MAPPED_NODE) 2866 return 0; 2867 2868 piocbq = &(lpfc_cmd->cur_iocbq); 2869 piocbq->vport = vport; 2870 2871 piocb = &piocbq->iocb; 2872 2873 fcp_cmnd = lpfc_cmd->fcp_cmnd; 2874 /* Clear out any old data in the FCP command area */ 2875 memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd)); 2876 int_to_scsilun(lun, &fcp_cmnd->fcp_lun); 2877 fcp_cmnd->fcpCntl2 = task_mgmt_cmd; 2878 if (vport->phba->sli_rev == 3 && 2879 !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED)) 2880 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd); 2881 piocb->ulpCommand = CMD_FCP_ICMND64_CR; 2882 piocb->ulpContext = ndlp->nlp_rpi; 2883 if (vport->phba->sli_rev == LPFC_SLI_REV4) { 2884 piocb->ulpContext = 2885 vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]; 2886 } 2887 if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) { 2888 piocb->ulpFCP2Rcvy = 1; 2889 } 2890 piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f); 2891 2892 /* ulpTimeout is only one byte */ 2893 if (lpfc_cmd->timeout > 0xff) { 2894 /* 2895 * Do not timeout the command at the firmware level. 2896 * The driver will provide the timeout mechanism. 2897 */ 2898 piocb->ulpTimeout = 0; 2899 } else 2900 piocb->ulpTimeout = lpfc_cmd->timeout; 2901 2902 if (vport->phba->sli_rev == LPFC_SLI_REV4) 2903 lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd); 2904 2905 return 1; 2906 } 2907 2908 /** 2909 * lpfc_scsi_api_table_setup - Set up scsi api function jump table 2910 * @phba: The hba struct for which this call is being executed. 2911 * @dev_grp: The HBA PCI-Device group number. 2912 * 2913 * This routine sets up the SCSI interface API function jump table in @phba 2914 * struct. 2915 * Returns: 0 - success, -ENODEV - failure. 2916 **/ 2917 int 2918 lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp) 2919 { 2920 2921 phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf; 2922 phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd; 2923 2924 switch (dev_grp) { 2925 case LPFC_PCI_DEV_LP: 2926 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s3; 2927 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3; 2928 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3; 2929 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3; 2930 break; 2931 case LPFC_PCI_DEV_OC: 2932 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s4; 2933 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4; 2934 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4; 2935 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4; 2936 break; 2937 default: 2938 lpfc_printf_log(phba, KERN_ERR, LOG_INIT, 2939 "1418 Invalid HBA PCI-device group: 0x%x\n", 2940 dev_grp); 2941 return -ENODEV; 2942 break; 2943 } 2944 phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth; 2945 phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl; 2946 return 0; 2947 } 2948 2949 /** 2950 * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command 2951 * @phba: The Hba for which this call is being executed. 2952 * @cmdiocbq: Pointer to lpfc_iocbq data structure. 2953 * @rspiocbq: Pointer to lpfc_iocbq data structure. 2954 * 2955 * This routine is IOCB completion routine for device reset and target reset 2956 * routine. This routine release scsi buffer associated with lpfc_cmd. 2957 **/ 2958 static void 2959 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba, 2960 struct lpfc_iocbq *cmdiocbq, 2961 struct lpfc_iocbq *rspiocbq) 2962 { 2963 struct lpfc_scsi_buf *lpfc_cmd = 2964 (struct lpfc_scsi_buf *) cmdiocbq->context1; 2965 if (lpfc_cmd) 2966 lpfc_release_scsi_buf(phba, lpfc_cmd); 2967 return; 2968 } 2969 2970 /** 2971 * lpfc_info - Info entry point of scsi_host_template data structure 2972 * @host: The scsi host for which this call is being executed. 2973 * 2974 * This routine provides module information about hba. 2975 * 2976 * Reutrn code: 2977 * Pointer to char - Success. 2978 **/ 2979 const char * 2980 lpfc_info(struct Scsi_Host *host) 2981 { 2982 struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata; 2983 struct lpfc_hba *phba = vport->phba; 2984 int len; 2985 static char lpfcinfobuf[384]; 2986 2987 memset(lpfcinfobuf,0,384); 2988 if (phba && phba->pcidev){ 2989 strncpy(lpfcinfobuf, phba->ModelDesc, 256); 2990 len = strlen(lpfcinfobuf); 2991 snprintf(lpfcinfobuf + len, 2992 384-len, 2993 " on PCI bus %02x device %02x irq %d", 2994 phba->pcidev->bus->number, 2995 phba->pcidev->devfn, 2996 phba->pcidev->irq); 2997 len = strlen(lpfcinfobuf); 2998 if (phba->Port[0]) { 2999 snprintf(lpfcinfobuf + len, 3000 384-len, 3001 " port %s", 3002 phba->Port); 3003 } 3004 len = strlen(lpfcinfobuf); 3005 if (phba->sli4_hba.link_state.logical_speed) { 3006 snprintf(lpfcinfobuf + len, 3007 384-len, 3008 " Logical Link Speed: %d Mbps", 3009 phba->sli4_hba.link_state.logical_speed * 10); 3010 } 3011 } 3012 return lpfcinfobuf; 3013 } 3014 3015 /** 3016 * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba 3017 * @phba: The Hba for which this call is being executed. 3018 * 3019 * This routine modifies fcp_poll_timer field of @phba by cfg_poll_tmo. 3020 * The default value of cfg_poll_tmo is 10 milliseconds. 3021 **/ 3022 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba) 3023 { 3024 unsigned long poll_tmo_expires = 3025 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo)); 3026 3027 if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt) 3028 mod_timer(&phba->fcp_poll_timer, 3029 poll_tmo_expires); 3030 } 3031 3032 /** 3033 * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA 3034 * @phba: The Hba for which this call is being executed. 3035 * 3036 * This routine starts the fcp_poll_timer of @phba. 3037 **/ 3038 void lpfc_poll_start_timer(struct lpfc_hba * phba) 3039 { 3040 lpfc_poll_rearm_timer(phba); 3041 } 3042 3043 /** 3044 * lpfc_poll_timeout - Restart polling timer 3045 * @ptr: Map to lpfc_hba data structure pointer. 3046 * 3047 * This routine restarts fcp_poll timer, when FCP ring polling is enable 3048 * and FCP Ring interrupt is disable. 3049 **/ 3050 3051 void lpfc_poll_timeout(unsigned long ptr) 3052 { 3053 struct lpfc_hba *phba = (struct lpfc_hba *) ptr; 3054 3055 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 3056 lpfc_sli_handle_fast_ring_event(phba, 3057 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); 3058 3059 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 3060 lpfc_poll_rearm_timer(phba); 3061 } 3062 } 3063 3064 /** 3065 * lpfc_queuecommand - scsi_host_template queuecommand entry point 3066 * @cmnd: Pointer to scsi_cmnd data structure. 3067 * @done: Pointer to done routine. 3068 * 3069 * Driver registers this routine to scsi midlayer to submit a @cmd to process. 3070 * This routine prepares an IOCB from scsi command and provides to firmware. 3071 * The @done callback is invoked after driver finished processing the command. 3072 * 3073 * Return value : 3074 * 0 - Success 3075 * SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily. 3076 **/ 3077 static int 3078 lpfc_queuecommand_lck(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *)) 3079 { 3080 struct Scsi_Host *shost = cmnd->device->host; 3081 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 3082 struct lpfc_hba *phba = vport->phba; 3083 struct lpfc_rport_data *rdata = cmnd->device->hostdata; 3084 struct lpfc_nodelist *ndlp; 3085 struct lpfc_scsi_buf *lpfc_cmd; 3086 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 3087 int err; 3088 3089 err = fc_remote_port_chkready(rport); 3090 if (err) { 3091 cmnd->result = err; 3092 goto out_fail_command; 3093 } 3094 ndlp = rdata->pnode; 3095 3096 if (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED) && 3097 scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) { 3098 3099 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 3100 "9058 BLKGRD: ERROR: rcvd protected cmd:%02x" 3101 " op:%02x str=%s without registering for" 3102 " BlockGuard - Rejecting command\n", 3103 cmnd->cmnd[0], scsi_get_prot_op(cmnd), 3104 dif_op_str[scsi_get_prot_op(cmnd)]); 3105 goto out_fail_command; 3106 } 3107 3108 /* 3109 * Catch race where our node has transitioned, but the 3110 * transport is still transitioning. 3111 */ 3112 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) { 3113 cmnd->result = ScsiResult(DID_IMM_RETRY, 0); 3114 goto out_fail_command; 3115 } 3116 if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth) 3117 goto out_tgt_busy; 3118 3119 lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp); 3120 if (lpfc_cmd == NULL) { 3121 lpfc_rampdown_queue_depth(phba); 3122 3123 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 3124 "0707 driver's buffer pool is empty, " 3125 "IO busied\n"); 3126 goto out_host_busy; 3127 } 3128 3129 /* 3130 * Store the midlayer's command structure for the completion phase 3131 * and complete the command initialization. 3132 */ 3133 lpfc_cmd->pCmd = cmnd; 3134 lpfc_cmd->rdata = rdata; 3135 lpfc_cmd->timeout = 0; 3136 lpfc_cmd->start_time = jiffies; 3137 cmnd->host_scribble = (unsigned char *)lpfc_cmd; 3138 cmnd->scsi_done = done; 3139 3140 if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) { 3141 if (vport->phba->cfg_enable_bg) { 3142 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 3143 "9033 BLKGRD: rcvd protected cmd:%02x op:%02x " 3144 "str=%s\n", 3145 cmnd->cmnd[0], scsi_get_prot_op(cmnd), 3146 dif_op_str[scsi_get_prot_op(cmnd)]); 3147 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 3148 "9034 BLKGRD: CDB: %02x %02x %02x %02x %02x " 3149 "%02x %02x %02x %02x %02x\n", 3150 cmnd->cmnd[0], cmnd->cmnd[1], cmnd->cmnd[2], 3151 cmnd->cmnd[3], cmnd->cmnd[4], cmnd->cmnd[5], 3152 cmnd->cmnd[6], cmnd->cmnd[7], cmnd->cmnd[8], 3153 cmnd->cmnd[9]); 3154 if (cmnd->cmnd[0] == READ_10) 3155 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 3156 "9035 BLKGRD: READ @ sector %llu, " 3157 "count %u\n", 3158 (unsigned long long)scsi_get_lba(cmnd), 3159 blk_rq_sectors(cmnd->request)); 3160 else if (cmnd->cmnd[0] == WRITE_10) 3161 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 3162 "9036 BLKGRD: WRITE @ sector %llu, " 3163 "count %u cmd=%p\n", 3164 (unsigned long long)scsi_get_lba(cmnd), 3165 blk_rq_sectors(cmnd->request), 3166 cmnd); 3167 } 3168 3169 err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd); 3170 } else { 3171 if (vport->phba->cfg_enable_bg) { 3172 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 3173 "9038 BLKGRD: rcvd unprotected cmd:" 3174 "%02x op:%02x str=%s\n", 3175 cmnd->cmnd[0], scsi_get_prot_op(cmnd), 3176 dif_op_str[scsi_get_prot_op(cmnd)]); 3177 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 3178 "9039 BLKGRD: CDB: %02x %02x %02x " 3179 "%02x %02x %02x %02x %02x %02x %02x\n", 3180 cmnd->cmnd[0], cmnd->cmnd[1], 3181 cmnd->cmnd[2], cmnd->cmnd[3], 3182 cmnd->cmnd[4], cmnd->cmnd[5], 3183 cmnd->cmnd[6], cmnd->cmnd[7], 3184 cmnd->cmnd[8], cmnd->cmnd[9]); 3185 if (cmnd->cmnd[0] == READ_10) 3186 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 3187 "9040 dbg: READ @ sector %llu, " 3188 "count %u\n", 3189 (unsigned long long)scsi_get_lba(cmnd), 3190 blk_rq_sectors(cmnd->request)); 3191 else if (cmnd->cmnd[0] == WRITE_10) 3192 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 3193 "9041 dbg: WRITE @ sector %llu, " 3194 "count %u cmd=%p\n", 3195 (unsigned long long)scsi_get_lba(cmnd), 3196 blk_rq_sectors(cmnd->request), cmnd); 3197 else 3198 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, 3199 "9042 dbg: parser not implemented\n"); 3200 } 3201 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd); 3202 } 3203 3204 if (err) 3205 goto out_host_busy_free_buf; 3206 3207 lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp); 3208 3209 atomic_inc(&ndlp->cmd_pending); 3210 err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, 3211 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB); 3212 if (err) { 3213 atomic_dec(&ndlp->cmd_pending); 3214 goto out_host_busy_free_buf; 3215 } 3216 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 3217 spin_unlock(shost->host_lock); 3218 lpfc_sli_handle_fast_ring_event(phba, 3219 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); 3220 3221 spin_lock(shost->host_lock); 3222 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 3223 lpfc_poll_rearm_timer(phba); 3224 } 3225 3226 return 0; 3227 3228 out_host_busy_free_buf: 3229 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd); 3230 lpfc_release_scsi_buf(phba, lpfc_cmd); 3231 out_host_busy: 3232 return SCSI_MLQUEUE_HOST_BUSY; 3233 3234 out_tgt_busy: 3235 return SCSI_MLQUEUE_TARGET_BUSY; 3236 3237 out_fail_command: 3238 done(cmnd); 3239 return 0; 3240 } 3241 3242 static DEF_SCSI_QCMD(lpfc_queuecommand) 3243 3244 /** 3245 * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point 3246 * @cmnd: Pointer to scsi_cmnd data structure. 3247 * 3248 * This routine aborts @cmnd pending in base driver. 3249 * 3250 * Return code : 3251 * 0x2003 - Error 3252 * 0x2002 - Success 3253 **/ 3254 static int 3255 lpfc_abort_handler(struct scsi_cmnd *cmnd) 3256 { 3257 struct Scsi_Host *shost = cmnd->device->host; 3258 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 3259 struct lpfc_hba *phba = vport->phba; 3260 struct lpfc_iocbq *iocb; 3261 struct lpfc_iocbq *abtsiocb; 3262 struct lpfc_scsi_buf *lpfc_cmd; 3263 IOCB_t *cmd, *icmd; 3264 int ret = SUCCESS; 3265 DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq); 3266 3267 ret = fc_block_scsi_eh(cmnd); 3268 if (ret) 3269 return ret; 3270 lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble; 3271 if (!lpfc_cmd) { 3272 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 3273 "2873 SCSI Layer I/O Abort Request IO CMPL Status " 3274 "x%x ID %d LUN %d\n", 3275 ret, cmnd->device->id, cmnd->device->lun); 3276 return SUCCESS; 3277 } 3278 3279 /* 3280 * If pCmd field of the corresponding lpfc_scsi_buf structure 3281 * points to a different SCSI command, then the driver has 3282 * already completed this command, but the midlayer did not 3283 * see the completion before the eh fired. Just return 3284 * SUCCESS. 3285 */ 3286 iocb = &lpfc_cmd->cur_iocbq; 3287 if (lpfc_cmd->pCmd != cmnd) 3288 goto out; 3289 3290 BUG_ON(iocb->context1 != lpfc_cmd); 3291 3292 abtsiocb = lpfc_sli_get_iocbq(phba); 3293 if (abtsiocb == NULL) { 3294 ret = FAILED; 3295 goto out; 3296 } 3297 3298 /* 3299 * The scsi command can not be in txq and it is in flight because the 3300 * pCmd is still pointig at the SCSI command we have to abort. There 3301 * is no need to search the txcmplq. Just send an abort to the FW. 3302 */ 3303 3304 cmd = &iocb->iocb; 3305 icmd = &abtsiocb->iocb; 3306 icmd->un.acxri.abortType = ABORT_TYPE_ABTS; 3307 icmd->un.acxri.abortContextTag = cmd->ulpContext; 3308 if (phba->sli_rev == LPFC_SLI_REV4) 3309 icmd->un.acxri.abortIoTag = iocb->sli4_xritag; 3310 else 3311 icmd->un.acxri.abortIoTag = cmd->ulpIoTag; 3312 3313 icmd->ulpLe = 1; 3314 icmd->ulpClass = cmd->ulpClass; 3315 3316 /* ABTS WQE must go to the same WQ as the WQE to be aborted */ 3317 abtsiocb->fcp_wqidx = iocb->fcp_wqidx; 3318 abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX; 3319 3320 if (lpfc_is_link_up(phba)) 3321 icmd->ulpCommand = CMD_ABORT_XRI_CN; 3322 else 3323 icmd->ulpCommand = CMD_CLOSE_XRI_CN; 3324 3325 abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl; 3326 abtsiocb->vport = vport; 3327 if (lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, abtsiocb, 0) == 3328 IOCB_ERROR) { 3329 lpfc_sli_release_iocbq(phba, abtsiocb); 3330 ret = FAILED; 3331 goto out; 3332 } 3333 3334 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 3335 lpfc_sli_handle_fast_ring_event(phba, 3336 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); 3337 3338 lpfc_cmd->waitq = &waitq; 3339 /* Wait for abort to complete */ 3340 wait_event_timeout(waitq, 3341 (lpfc_cmd->pCmd != cmnd), 3342 (2*vport->cfg_devloss_tmo*HZ)); 3343 3344 spin_lock_irq(shost->host_lock); 3345 lpfc_cmd->waitq = NULL; 3346 spin_unlock_irq(shost->host_lock); 3347 3348 if (lpfc_cmd->pCmd == cmnd) { 3349 ret = FAILED; 3350 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3351 "0748 abort handler timed out waiting " 3352 "for abort to complete: ret %#x, ID %d, " 3353 "LUN %d\n", 3354 ret, cmnd->device->id, cmnd->device->lun); 3355 } 3356 3357 out: 3358 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 3359 "0749 SCSI Layer I/O Abort Request Status x%x ID %d " 3360 "LUN %d\n", ret, cmnd->device->id, 3361 cmnd->device->lun); 3362 return ret; 3363 } 3364 3365 static char * 3366 lpfc_taskmgmt_name(uint8_t task_mgmt_cmd) 3367 { 3368 switch (task_mgmt_cmd) { 3369 case FCP_ABORT_TASK_SET: 3370 return "ABORT_TASK_SET"; 3371 case FCP_CLEAR_TASK_SET: 3372 return "FCP_CLEAR_TASK_SET"; 3373 case FCP_BUS_RESET: 3374 return "FCP_BUS_RESET"; 3375 case FCP_LUN_RESET: 3376 return "FCP_LUN_RESET"; 3377 case FCP_TARGET_RESET: 3378 return "FCP_TARGET_RESET"; 3379 case FCP_CLEAR_ACA: 3380 return "FCP_CLEAR_ACA"; 3381 case FCP_TERMINATE_TASK: 3382 return "FCP_TERMINATE_TASK"; 3383 default: 3384 return "unknown"; 3385 } 3386 } 3387 3388 /** 3389 * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler 3390 * @vport: The virtual port for which this call is being executed. 3391 * @rdata: Pointer to remote port local data 3392 * @tgt_id: Target ID of remote device. 3393 * @lun_id: Lun number for the TMF 3394 * @task_mgmt_cmd: type of TMF to send 3395 * 3396 * This routine builds and sends a TMF (SCSI Task Mgmt Function) to 3397 * a remote port. 3398 * 3399 * Return Code: 3400 * 0x2003 - Error 3401 * 0x2002 - Success. 3402 **/ 3403 static int 3404 lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata, 3405 unsigned tgt_id, unsigned int lun_id, 3406 uint8_t task_mgmt_cmd) 3407 { 3408 struct lpfc_hba *phba = vport->phba; 3409 struct lpfc_scsi_buf *lpfc_cmd; 3410 struct lpfc_iocbq *iocbq; 3411 struct lpfc_iocbq *iocbqrsp; 3412 struct lpfc_nodelist *pnode = rdata->pnode; 3413 int ret; 3414 int status; 3415 3416 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 3417 return FAILED; 3418 3419 lpfc_cmd = lpfc_get_scsi_buf(phba, rdata->pnode); 3420 if (lpfc_cmd == NULL) 3421 return FAILED; 3422 lpfc_cmd->timeout = 60; 3423 lpfc_cmd->rdata = rdata; 3424 3425 status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id, 3426 task_mgmt_cmd); 3427 if (!status) { 3428 lpfc_release_scsi_buf(phba, lpfc_cmd); 3429 return FAILED; 3430 } 3431 3432 iocbq = &lpfc_cmd->cur_iocbq; 3433 iocbqrsp = lpfc_sli_get_iocbq(phba); 3434 if (iocbqrsp == NULL) { 3435 lpfc_release_scsi_buf(phba, lpfc_cmd); 3436 return FAILED; 3437 } 3438 3439 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 3440 "0702 Issue %s to TGT %d LUN %d " 3441 "rpi x%x nlp_flag x%x Data: x%x x%x\n", 3442 lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id, 3443 pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag, 3444 iocbq->iocb_flag); 3445 3446 status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING, 3447 iocbq, iocbqrsp, lpfc_cmd->timeout); 3448 if (status != IOCB_SUCCESS) { 3449 if (status == IOCB_TIMEDOUT) { 3450 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl; 3451 ret = TIMEOUT_ERROR; 3452 } else 3453 ret = FAILED; 3454 lpfc_cmd->status = IOSTAT_DRIVER_REJECT; 3455 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3456 "0727 TMF %s to TGT %d LUN %d failed (%d, %d) " 3457 "iocb_flag x%x\n", 3458 lpfc_taskmgmt_name(task_mgmt_cmd), 3459 tgt_id, lun_id, iocbqrsp->iocb.ulpStatus, 3460 iocbqrsp->iocb.un.ulpWord[4], 3461 iocbq->iocb_flag); 3462 } else if (status == IOCB_BUSY) 3463 ret = FAILED; 3464 else 3465 ret = SUCCESS; 3466 3467 lpfc_sli_release_iocbq(phba, iocbqrsp); 3468 3469 if (ret != TIMEOUT_ERROR) 3470 lpfc_release_scsi_buf(phba, lpfc_cmd); 3471 3472 return ret; 3473 } 3474 3475 /** 3476 * lpfc_chk_tgt_mapped - 3477 * @vport: The virtual port to check on 3478 * @cmnd: Pointer to scsi_cmnd data structure. 3479 * 3480 * This routine delays until the scsi target (aka rport) for the 3481 * command exists (is present and logged in) or we declare it non-existent. 3482 * 3483 * Return code : 3484 * 0x2003 - Error 3485 * 0x2002 - Success 3486 **/ 3487 static int 3488 lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd) 3489 { 3490 struct lpfc_rport_data *rdata = cmnd->device->hostdata; 3491 struct lpfc_nodelist *pnode; 3492 unsigned long later; 3493 3494 if (!rdata) { 3495 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 3496 "0797 Tgt Map rport failure: rdata x%p\n", rdata); 3497 return FAILED; 3498 } 3499 pnode = rdata->pnode; 3500 /* 3501 * If target is not in a MAPPED state, delay until 3502 * target is rediscovered or devloss timeout expires. 3503 */ 3504 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; 3505 while (time_after(later, jiffies)) { 3506 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 3507 return FAILED; 3508 if (pnode->nlp_state == NLP_STE_MAPPED_NODE) 3509 return SUCCESS; 3510 schedule_timeout_uninterruptible(msecs_to_jiffies(500)); 3511 rdata = cmnd->device->hostdata; 3512 if (!rdata) 3513 return FAILED; 3514 pnode = rdata->pnode; 3515 } 3516 if (!pnode || !NLP_CHK_NODE_ACT(pnode) || 3517 (pnode->nlp_state != NLP_STE_MAPPED_NODE)) 3518 return FAILED; 3519 return SUCCESS; 3520 } 3521 3522 /** 3523 * lpfc_reset_flush_io_context - 3524 * @vport: The virtual port (scsi_host) for the flush context 3525 * @tgt_id: If aborting by Target contect - specifies the target id 3526 * @lun_id: If aborting by Lun context - specifies the lun id 3527 * @context: specifies the context level to flush at. 3528 * 3529 * After a reset condition via TMF, we need to flush orphaned i/o 3530 * contexts from the adapter. This routine aborts any contexts 3531 * outstanding, then waits for their completions. The wait is 3532 * bounded by devloss_tmo though. 3533 * 3534 * Return code : 3535 * 0x2003 - Error 3536 * 0x2002 - Success 3537 **/ 3538 static int 3539 lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id, 3540 uint64_t lun_id, lpfc_ctx_cmd context) 3541 { 3542 struct lpfc_hba *phba = vport->phba; 3543 unsigned long later; 3544 int cnt; 3545 3546 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context); 3547 if (cnt) 3548 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring], 3549 tgt_id, lun_id, context); 3550 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; 3551 while (time_after(later, jiffies) && cnt) { 3552 schedule_timeout_uninterruptible(msecs_to_jiffies(20)); 3553 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context); 3554 } 3555 if (cnt) { 3556 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3557 "0724 I/O flush failure for context %s : cnt x%x\n", 3558 ((context == LPFC_CTX_LUN) ? "LUN" : 3559 ((context == LPFC_CTX_TGT) ? "TGT" : 3560 ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))), 3561 cnt); 3562 return FAILED; 3563 } 3564 return SUCCESS; 3565 } 3566 3567 /** 3568 * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point 3569 * @cmnd: Pointer to scsi_cmnd data structure. 3570 * 3571 * This routine does a device reset by sending a LUN_RESET task management 3572 * command. 3573 * 3574 * Return code : 3575 * 0x2003 - Error 3576 * 0x2002 - Success 3577 **/ 3578 static int 3579 lpfc_device_reset_handler(struct scsi_cmnd *cmnd) 3580 { 3581 struct Scsi_Host *shost = cmnd->device->host; 3582 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 3583 struct lpfc_rport_data *rdata = cmnd->device->hostdata; 3584 struct lpfc_nodelist *pnode; 3585 unsigned tgt_id = cmnd->device->id; 3586 unsigned int lun_id = cmnd->device->lun; 3587 struct lpfc_scsi_event_header scsi_event; 3588 int status; 3589 3590 if (!rdata) { 3591 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3592 "0798 Device Reset rport failure: rdata x%p\n", rdata); 3593 return FAILED; 3594 } 3595 pnode = rdata->pnode; 3596 status = fc_block_scsi_eh(cmnd); 3597 if (status) 3598 return status; 3599 3600 status = lpfc_chk_tgt_mapped(vport, cmnd); 3601 if (status == FAILED) { 3602 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3603 "0721 Device Reset rport failure: rdata x%p\n", rdata); 3604 return FAILED; 3605 } 3606 3607 scsi_event.event_type = FC_REG_SCSI_EVENT; 3608 scsi_event.subcategory = LPFC_EVENT_LUNRESET; 3609 scsi_event.lun = lun_id; 3610 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name)); 3611 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name)); 3612 3613 fc_host_post_vendor_event(shost, fc_get_event_number(), 3614 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID); 3615 3616 status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id, 3617 FCP_LUN_RESET); 3618 3619 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3620 "0713 SCSI layer issued Device Reset (%d, %d) " 3621 "return x%x\n", tgt_id, lun_id, status); 3622 3623 /* 3624 * We have to clean up i/o as : they may be orphaned by the TMF; 3625 * or if the TMF failed, they may be in an indeterminate state. 3626 * So, continue on. 3627 * We will report success if all the i/o aborts successfully. 3628 */ 3629 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id, 3630 LPFC_CTX_LUN); 3631 return status; 3632 } 3633 3634 /** 3635 * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point 3636 * @cmnd: Pointer to scsi_cmnd data structure. 3637 * 3638 * This routine does a target reset by sending a TARGET_RESET task management 3639 * command. 3640 * 3641 * Return code : 3642 * 0x2003 - Error 3643 * 0x2002 - Success 3644 **/ 3645 static int 3646 lpfc_target_reset_handler(struct scsi_cmnd *cmnd) 3647 { 3648 struct Scsi_Host *shost = cmnd->device->host; 3649 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 3650 struct lpfc_rport_data *rdata = cmnd->device->hostdata; 3651 struct lpfc_nodelist *pnode; 3652 unsigned tgt_id = cmnd->device->id; 3653 unsigned int lun_id = cmnd->device->lun; 3654 struct lpfc_scsi_event_header scsi_event; 3655 int status; 3656 3657 if (!rdata) { 3658 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3659 "0799 Target Reset rport failure: rdata x%p\n", rdata); 3660 return FAILED; 3661 } 3662 pnode = rdata->pnode; 3663 status = fc_block_scsi_eh(cmnd); 3664 if (status) 3665 return status; 3666 3667 status = lpfc_chk_tgt_mapped(vport, cmnd); 3668 if (status == FAILED) { 3669 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3670 "0722 Target Reset rport failure: rdata x%p\n", rdata); 3671 return FAILED; 3672 } 3673 3674 scsi_event.event_type = FC_REG_SCSI_EVENT; 3675 scsi_event.subcategory = LPFC_EVENT_TGTRESET; 3676 scsi_event.lun = 0; 3677 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name)); 3678 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name)); 3679 3680 fc_host_post_vendor_event(shost, fc_get_event_number(), 3681 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID); 3682 3683 status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id, 3684 FCP_TARGET_RESET); 3685 3686 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3687 "0723 SCSI layer issued Target Reset (%d, %d) " 3688 "return x%x\n", tgt_id, lun_id, status); 3689 3690 /* 3691 * We have to clean up i/o as : they may be orphaned by the TMF; 3692 * or if the TMF failed, they may be in an indeterminate state. 3693 * So, continue on. 3694 * We will report success if all the i/o aborts successfully. 3695 */ 3696 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id, 3697 LPFC_CTX_TGT); 3698 return status; 3699 } 3700 3701 /** 3702 * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point 3703 * @cmnd: Pointer to scsi_cmnd data structure. 3704 * 3705 * This routine does target reset to all targets on @cmnd->device->host. 3706 * This emulates Parallel SCSI Bus Reset Semantics. 3707 * 3708 * Return code : 3709 * 0x2003 - Error 3710 * 0x2002 - Success 3711 **/ 3712 static int 3713 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd) 3714 { 3715 struct Scsi_Host *shost = cmnd->device->host; 3716 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 3717 struct lpfc_nodelist *ndlp = NULL; 3718 struct lpfc_scsi_event_header scsi_event; 3719 int match; 3720 int ret = SUCCESS, status, i; 3721 3722 scsi_event.event_type = FC_REG_SCSI_EVENT; 3723 scsi_event.subcategory = LPFC_EVENT_BUSRESET; 3724 scsi_event.lun = 0; 3725 memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name)); 3726 memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name)); 3727 3728 fc_host_post_vendor_event(shost, fc_get_event_number(), 3729 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID); 3730 3731 ret = fc_block_scsi_eh(cmnd); 3732 if (ret) 3733 return ret; 3734 3735 /* 3736 * Since the driver manages a single bus device, reset all 3737 * targets known to the driver. Should any target reset 3738 * fail, this routine returns failure to the midlayer. 3739 */ 3740 for (i = 0; i < LPFC_MAX_TARGET; i++) { 3741 /* Search for mapped node by target ID */ 3742 match = 0; 3743 spin_lock_irq(shost->host_lock); 3744 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) { 3745 if (!NLP_CHK_NODE_ACT(ndlp)) 3746 continue; 3747 if (ndlp->nlp_state == NLP_STE_MAPPED_NODE && 3748 ndlp->nlp_sid == i && 3749 ndlp->rport) { 3750 match = 1; 3751 break; 3752 } 3753 } 3754 spin_unlock_irq(shost->host_lock); 3755 if (!match) 3756 continue; 3757 3758 status = lpfc_send_taskmgmt(vport, ndlp->rport->dd_data, 3759 i, 0, FCP_TARGET_RESET); 3760 3761 if (status != SUCCESS) { 3762 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3763 "0700 Bus Reset on target %d failed\n", 3764 i); 3765 ret = FAILED; 3766 } 3767 } 3768 /* 3769 * We have to clean up i/o as : they may be orphaned by the TMFs 3770 * above; or if any of the TMFs failed, they may be in an 3771 * indeterminate state. 3772 * We will report success if all the i/o aborts successfully. 3773 */ 3774 3775 status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST); 3776 if (status != SUCCESS) 3777 ret = FAILED; 3778 3779 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3780 "0714 SCSI layer issued Bus Reset Data: x%x\n", ret); 3781 return ret; 3782 } 3783 3784 /** 3785 * lpfc_slave_alloc - scsi_host_template slave_alloc entry point 3786 * @sdev: Pointer to scsi_device. 3787 * 3788 * This routine populates the cmds_per_lun count + 2 scsi_bufs into this host's 3789 * globally available list of scsi buffers. This routine also makes sure scsi 3790 * buffer is not allocated more than HBA limit conveyed to midlayer. This list 3791 * of scsi buffer exists for the lifetime of the driver. 3792 * 3793 * Return codes: 3794 * non-0 - Error 3795 * 0 - Success 3796 **/ 3797 static int 3798 lpfc_slave_alloc(struct scsi_device *sdev) 3799 { 3800 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 3801 struct lpfc_hba *phba = vport->phba; 3802 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 3803 uint32_t total = 0; 3804 uint32_t num_to_alloc = 0; 3805 int num_allocated = 0; 3806 uint32_t sdev_cnt; 3807 3808 if (!rport || fc_remote_port_chkready(rport)) 3809 return -ENXIO; 3810 3811 sdev->hostdata = rport->dd_data; 3812 sdev_cnt = atomic_inc_return(&phba->sdev_cnt); 3813 3814 /* 3815 * Populate the cmds_per_lun count scsi_bufs into this host's globally 3816 * available list of scsi buffers. Don't allocate more than the 3817 * HBA limit conveyed to the midlayer via the host structure. The 3818 * formula accounts for the lun_queue_depth + error handlers + 1 3819 * extra. This list of scsi bufs exists for the lifetime of the driver. 3820 */ 3821 total = phba->total_scsi_bufs; 3822 num_to_alloc = vport->cfg_lun_queue_depth + 2; 3823 3824 /* If allocated buffers are enough do nothing */ 3825 if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total) 3826 return 0; 3827 3828 /* Allow some exchanges to be available always to complete discovery */ 3829 if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) { 3830 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 3831 "0704 At limitation of %d preallocated " 3832 "command buffers\n", total); 3833 return 0; 3834 /* Allow some exchanges to be available always to complete discovery */ 3835 } else if (total + num_to_alloc > 3836 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) { 3837 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 3838 "0705 Allocation request of %d " 3839 "command buffers will exceed max of %d. " 3840 "Reducing allocation request to %d.\n", 3841 num_to_alloc, phba->cfg_hba_queue_depth, 3842 (phba->cfg_hba_queue_depth - total)); 3843 num_to_alloc = phba->cfg_hba_queue_depth - total; 3844 } 3845 num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc); 3846 if (num_to_alloc != num_allocated) { 3847 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 3848 "0708 Allocation request of %d " 3849 "command buffers did not succeed. " 3850 "Allocated %d buffers.\n", 3851 num_to_alloc, num_allocated); 3852 } 3853 if (num_allocated > 0) 3854 phba->total_scsi_bufs += num_allocated; 3855 return 0; 3856 } 3857 3858 /** 3859 * lpfc_slave_configure - scsi_host_template slave_configure entry point 3860 * @sdev: Pointer to scsi_device. 3861 * 3862 * This routine configures following items 3863 * - Tag command queuing support for @sdev if supported. 3864 * - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set. 3865 * 3866 * Return codes: 3867 * 0 - Success 3868 **/ 3869 static int 3870 lpfc_slave_configure(struct scsi_device *sdev) 3871 { 3872 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 3873 struct lpfc_hba *phba = vport->phba; 3874 3875 if (sdev->tagged_supported) 3876 scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth); 3877 else 3878 scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth); 3879 3880 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 3881 lpfc_sli_handle_fast_ring_event(phba, 3882 &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); 3883 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 3884 lpfc_poll_rearm_timer(phba); 3885 } 3886 3887 return 0; 3888 } 3889 3890 /** 3891 * lpfc_slave_destroy - slave_destroy entry point of SHT data structure 3892 * @sdev: Pointer to scsi_device. 3893 * 3894 * This routine sets @sdev hostatdata filed to null. 3895 **/ 3896 static void 3897 lpfc_slave_destroy(struct scsi_device *sdev) 3898 { 3899 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 3900 struct lpfc_hba *phba = vport->phba; 3901 atomic_dec(&phba->sdev_cnt); 3902 sdev->hostdata = NULL; 3903 return; 3904 } 3905 3906 3907 struct scsi_host_template lpfc_template = { 3908 .module = THIS_MODULE, 3909 .name = LPFC_DRIVER_NAME, 3910 .info = lpfc_info, 3911 .queuecommand = lpfc_queuecommand, 3912 .eh_abort_handler = lpfc_abort_handler, 3913 .eh_device_reset_handler = lpfc_device_reset_handler, 3914 .eh_target_reset_handler = lpfc_target_reset_handler, 3915 .eh_bus_reset_handler = lpfc_bus_reset_handler, 3916 .slave_alloc = lpfc_slave_alloc, 3917 .slave_configure = lpfc_slave_configure, 3918 .slave_destroy = lpfc_slave_destroy, 3919 .scan_finished = lpfc_scan_finished, 3920 .this_id = -1, 3921 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT, 3922 .cmd_per_lun = LPFC_CMD_PER_LUN, 3923 .use_clustering = ENABLE_CLUSTERING, 3924 .shost_attrs = lpfc_hba_attrs, 3925 .max_sectors = 0xFFFF, 3926 .vendor_id = LPFC_NL_VENDOR_ID, 3927 .change_queue_depth = lpfc_change_queue_depth, 3928 }; 3929 3930 struct scsi_host_template lpfc_vport_template = { 3931 .module = THIS_MODULE, 3932 .name = LPFC_DRIVER_NAME, 3933 .info = lpfc_info, 3934 .queuecommand = lpfc_queuecommand, 3935 .eh_abort_handler = lpfc_abort_handler, 3936 .eh_device_reset_handler = lpfc_device_reset_handler, 3937 .eh_target_reset_handler = lpfc_target_reset_handler, 3938 .eh_bus_reset_handler = lpfc_bus_reset_handler, 3939 .slave_alloc = lpfc_slave_alloc, 3940 .slave_configure = lpfc_slave_configure, 3941 .slave_destroy = lpfc_slave_destroy, 3942 .scan_finished = lpfc_scan_finished, 3943 .this_id = -1, 3944 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT, 3945 .cmd_per_lun = LPFC_CMD_PER_LUN, 3946 .use_clustering = ENABLE_CLUSTERING, 3947 .shost_attrs = lpfc_vport_attrs, 3948 .max_sectors = 0xFFFF, 3949 .change_queue_depth = lpfc_change_queue_depth, 3950 }; 3951