1 /******************************************************************* 2 * This file is part of the Emulex Linux Device Driver for * 3 * Fibre Channel Host Bus Adapters. * 4 * Copyright (C) 2017 Broadcom. All Rights Reserved. The term * 5 * “Broadcom” refers to Broadcom Limited and/or its subsidiaries. * 6 * Copyright (C) 2004-2016 Emulex. All rights reserved. * 7 * EMULEX and SLI are trademarks of Emulex. * 8 * www.broadcom.com * 9 * Portions Copyright (C) 2004-2005 Christoph Hellwig * 10 * * 11 * This program is free software; you can redistribute it and/or * 12 * modify it under the terms of version 2 of the GNU General * 13 * Public License as published by the Free Software Foundation. * 14 * This program is distributed in the hope that it will be useful. * 15 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND * 16 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, * 17 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE * 18 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD * 19 * TO BE LEGALLY INVALID. See the GNU General Public License for * 20 * more details, a copy of which can be found in the file COPYING * 21 * included with this package. * 22 *******************************************************************/ 23 #include <linux/pci.h> 24 #include <linux/slab.h> 25 #include <linux/interrupt.h> 26 #include <linux/export.h> 27 #include <linux/delay.h> 28 #include <asm/unaligned.h> 29 #include <linux/crc-t10dif.h> 30 #include <net/checksum.h> 31 32 #include <scsi/scsi.h> 33 #include <scsi/scsi_device.h> 34 #include <scsi/scsi_eh.h> 35 #include <scsi/scsi_host.h> 36 #include <scsi/scsi_tcq.h> 37 #include <scsi/scsi_transport_fc.h> 38 39 #include "lpfc_version.h" 40 #include "lpfc_hw4.h" 41 #include "lpfc_hw.h" 42 #include "lpfc_sli.h" 43 #include "lpfc_sli4.h" 44 #include "lpfc_nl.h" 45 #include "lpfc_disc.h" 46 #include "lpfc.h" 47 #include "lpfc_scsi.h" 48 #include "lpfc_logmsg.h" 49 #include "lpfc_crtn.h" 50 #include "lpfc_vport.h" 51 52 #define LPFC_RESET_WAIT 2 53 #define LPFC_ABORT_WAIT 2 54 55 int _dump_buf_done = 1; 56 57 static char *dif_op_str[] = { 58 "PROT_NORMAL", 59 "PROT_READ_INSERT", 60 "PROT_WRITE_STRIP", 61 "PROT_READ_STRIP", 62 "PROT_WRITE_INSERT", 63 "PROT_READ_PASS", 64 "PROT_WRITE_PASS", 65 }; 66 67 struct scsi_dif_tuple { 68 __be16 guard_tag; /* Checksum */ 69 __be16 app_tag; /* Opaque storage */ 70 __be32 ref_tag; /* Target LBA or indirect LBA */ 71 }; 72 73 static struct lpfc_rport_data * 74 lpfc_rport_data_from_scsi_device(struct scsi_device *sdev) 75 { 76 struct lpfc_vport *vport = (struct lpfc_vport *)sdev->host->hostdata; 77 78 if (vport->phba->cfg_fof) 79 return ((struct lpfc_device_data *)sdev->hostdata)->rport_data; 80 else 81 return (struct lpfc_rport_data *)sdev->hostdata; 82 } 83 84 static void 85 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb); 86 static void 87 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb); 88 static int 89 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc); 90 91 static void 92 lpfc_debug_save_data(struct lpfc_hba *phba, struct scsi_cmnd *cmnd) 93 { 94 void *src, *dst; 95 struct scatterlist *sgde = scsi_sglist(cmnd); 96 97 if (!_dump_buf_data) { 98 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 99 "9050 BLKGRD: ERROR %s _dump_buf_data is NULL\n", 100 __func__); 101 return; 102 } 103 104 105 if (!sgde) { 106 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 107 "9051 BLKGRD: ERROR: data scatterlist is null\n"); 108 return; 109 } 110 111 dst = (void *) _dump_buf_data; 112 while (sgde) { 113 src = sg_virt(sgde); 114 memcpy(dst, src, sgde->length); 115 dst += sgde->length; 116 sgde = sg_next(sgde); 117 } 118 } 119 120 static void 121 lpfc_debug_save_dif(struct lpfc_hba *phba, struct scsi_cmnd *cmnd) 122 { 123 void *src, *dst; 124 struct scatterlist *sgde = scsi_prot_sglist(cmnd); 125 126 if (!_dump_buf_dif) { 127 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 128 "9052 BLKGRD: ERROR %s _dump_buf_data is NULL\n", 129 __func__); 130 return; 131 } 132 133 if (!sgde) { 134 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 135 "9053 BLKGRD: ERROR: prot scatterlist is null\n"); 136 return; 137 } 138 139 dst = _dump_buf_dif; 140 while (sgde) { 141 src = sg_virt(sgde); 142 memcpy(dst, src, sgde->length); 143 dst += sgde->length; 144 sgde = sg_next(sgde); 145 } 146 } 147 148 static inline unsigned 149 lpfc_cmd_blksize(struct scsi_cmnd *sc) 150 { 151 return sc->device->sector_size; 152 } 153 154 #define LPFC_CHECK_PROTECT_GUARD 1 155 #define LPFC_CHECK_PROTECT_REF 2 156 static inline unsigned 157 lpfc_cmd_protect(struct scsi_cmnd *sc, int flag) 158 { 159 return 1; 160 } 161 162 static inline unsigned 163 lpfc_cmd_guard_csum(struct scsi_cmnd *sc) 164 { 165 if (lpfc_prot_group_type(NULL, sc) == LPFC_PG_TYPE_NO_DIF) 166 return 0; 167 if (scsi_host_get_guard(sc->device->host) == SHOST_DIX_GUARD_IP) 168 return 1; 169 return 0; 170 } 171 172 /** 173 * lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge. 174 * @phba: Pointer to HBA object. 175 * @lpfc_cmd: lpfc scsi command object pointer. 176 * 177 * This function is called from the lpfc_prep_task_mgmt_cmd function to 178 * set the last bit in the response sge entry. 179 **/ 180 static void 181 lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba, 182 struct lpfc_scsi_buf *lpfc_cmd) 183 { 184 struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl; 185 if (sgl) { 186 sgl += 1; 187 sgl->word2 = le32_to_cpu(sgl->word2); 188 bf_set(lpfc_sli4_sge_last, sgl, 1); 189 sgl->word2 = cpu_to_le32(sgl->word2); 190 } 191 } 192 193 /** 194 * lpfc_update_stats - Update statistical data for the command completion 195 * @phba: Pointer to HBA object. 196 * @lpfc_cmd: lpfc scsi command object pointer. 197 * 198 * This function is called when there is a command completion and this 199 * function updates the statistical data for the command completion. 200 **/ 201 static void 202 lpfc_update_stats(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 203 { 204 struct lpfc_rport_data *rdata = lpfc_cmd->rdata; 205 struct lpfc_nodelist *pnode = rdata->pnode; 206 struct scsi_cmnd *cmd = lpfc_cmd->pCmd; 207 unsigned long flags; 208 struct Scsi_Host *shost = cmd->device->host; 209 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 210 unsigned long latency; 211 int i; 212 213 if (cmd->result) 214 return; 215 216 latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time); 217 218 spin_lock_irqsave(shost->host_lock, flags); 219 if (!vport->stat_data_enabled || 220 vport->stat_data_blocked || 221 !pnode || 222 !pnode->lat_data || 223 (phba->bucket_type == LPFC_NO_BUCKET)) { 224 spin_unlock_irqrestore(shost->host_lock, flags); 225 return; 226 } 227 228 if (phba->bucket_type == LPFC_LINEAR_BUCKET) { 229 i = (latency + phba->bucket_step - 1 - phba->bucket_base)/ 230 phba->bucket_step; 231 /* check array subscript bounds */ 232 if (i < 0) 233 i = 0; 234 else if (i >= LPFC_MAX_BUCKET_COUNT) 235 i = LPFC_MAX_BUCKET_COUNT - 1; 236 } else { 237 for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++) 238 if (latency <= (phba->bucket_base + 239 ((1<<i)*phba->bucket_step))) 240 break; 241 } 242 243 pnode->lat_data[i].cmd_count++; 244 spin_unlock_irqrestore(shost->host_lock, flags); 245 } 246 247 /** 248 * lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread 249 * @phba: The Hba for which this call is being executed. 250 * 251 * This routine is called when there is resource error in driver or firmware. 252 * This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine 253 * posts at most 1 event each second. This routine wakes up worker thread of 254 * @phba to process WORKER_RAM_DOWN_EVENT event. 255 * 256 * This routine should be called with no lock held. 257 **/ 258 void 259 lpfc_rampdown_queue_depth(struct lpfc_hba *phba) 260 { 261 unsigned long flags; 262 uint32_t evt_posted; 263 unsigned long expires; 264 265 spin_lock_irqsave(&phba->hbalock, flags); 266 atomic_inc(&phba->num_rsrc_err); 267 phba->last_rsrc_error_time = jiffies; 268 269 expires = phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL; 270 if (time_after(expires, jiffies)) { 271 spin_unlock_irqrestore(&phba->hbalock, flags); 272 return; 273 } 274 275 phba->last_ramp_down_time = jiffies; 276 277 spin_unlock_irqrestore(&phba->hbalock, flags); 278 279 spin_lock_irqsave(&phba->pport->work_port_lock, flags); 280 evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE; 281 if (!evt_posted) 282 phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE; 283 spin_unlock_irqrestore(&phba->pport->work_port_lock, flags); 284 285 if (!evt_posted) 286 lpfc_worker_wake_up(phba); 287 return; 288 } 289 290 /** 291 * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler 292 * @phba: The Hba for which this call is being executed. 293 * 294 * This routine is called to process WORKER_RAMP_DOWN_QUEUE event for worker 295 * thread.This routine reduces queue depth for all scsi device on each vport 296 * associated with @phba. 297 **/ 298 void 299 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba) 300 { 301 struct lpfc_vport **vports; 302 struct Scsi_Host *shost; 303 struct scsi_device *sdev; 304 unsigned long new_queue_depth; 305 unsigned long num_rsrc_err, num_cmd_success; 306 int i; 307 308 num_rsrc_err = atomic_read(&phba->num_rsrc_err); 309 num_cmd_success = atomic_read(&phba->num_cmd_success); 310 311 /* 312 * The error and success command counters are global per 313 * driver instance. If another handler has already 314 * operated on this error event, just exit. 315 */ 316 if (num_rsrc_err == 0) 317 return; 318 319 vports = lpfc_create_vport_work_array(phba); 320 if (vports != NULL) 321 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) { 322 shost = lpfc_shost_from_vport(vports[i]); 323 shost_for_each_device(sdev, shost) { 324 new_queue_depth = 325 sdev->queue_depth * num_rsrc_err / 326 (num_rsrc_err + num_cmd_success); 327 if (!new_queue_depth) 328 new_queue_depth = sdev->queue_depth - 1; 329 else 330 new_queue_depth = sdev->queue_depth - 331 new_queue_depth; 332 scsi_change_queue_depth(sdev, new_queue_depth); 333 } 334 } 335 lpfc_destroy_vport_work_array(phba, vports); 336 atomic_set(&phba->num_rsrc_err, 0); 337 atomic_set(&phba->num_cmd_success, 0); 338 } 339 340 /** 341 * lpfc_scsi_dev_block - set all scsi hosts to block state 342 * @phba: Pointer to HBA context object. 343 * 344 * This function walks vport list and set each SCSI host to block state 345 * by invoking fc_remote_port_delete() routine. This function is invoked 346 * with EEH when device's PCI slot has been permanently disabled. 347 **/ 348 void 349 lpfc_scsi_dev_block(struct lpfc_hba *phba) 350 { 351 struct lpfc_vport **vports; 352 struct Scsi_Host *shost; 353 struct scsi_device *sdev; 354 struct fc_rport *rport; 355 int i; 356 357 vports = lpfc_create_vport_work_array(phba); 358 if (vports != NULL) 359 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) { 360 shost = lpfc_shost_from_vport(vports[i]); 361 shost_for_each_device(sdev, shost) { 362 rport = starget_to_rport(scsi_target(sdev)); 363 fc_remote_port_delete(rport); 364 } 365 } 366 lpfc_destroy_vport_work_array(phba, vports); 367 } 368 369 /** 370 * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec 371 * @vport: The virtual port for which this call being executed. 372 * @num_to_allocate: The requested number of buffers to allocate. 373 * 374 * This routine allocates a scsi buffer for device with SLI-3 interface spec, 375 * the scsi buffer contains all the necessary information needed to initiate 376 * a SCSI I/O. The non-DMAable buffer region contains information to build 377 * the IOCB. The DMAable region contains memory for the FCP CMND, FCP RSP, 378 * and the initial BPL. In addition to allocating memory, the FCP CMND and 379 * FCP RSP BDEs are setup in the BPL and the BPL BDE is setup in the IOCB. 380 * 381 * Return codes: 382 * int - number of scsi buffers that were allocated. 383 * 0 = failure, less than num_to_alloc is a partial failure. 384 **/ 385 static int 386 lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc) 387 { 388 struct lpfc_hba *phba = vport->phba; 389 struct lpfc_scsi_buf *psb; 390 struct ulp_bde64 *bpl; 391 IOCB_t *iocb; 392 dma_addr_t pdma_phys_fcp_cmd; 393 dma_addr_t pdma_phys_fcp_rsp; 394 dma_addr_t pdma_phys_bpl; 395 uint16_t iotag; 396 int bcnt, bpl_size; 397 398 bpl_size = phba->cfg_sg_dma_buf_size - 399 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp)); 400 401 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 402 "9067 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n", 403 num_to_alloc, phba->cfg_sg_dma_buf_size, 404 (int)sizeof(struct fcp_cmnd), 405 (int)sizeof(struct fcp_rsp), bpl_size); 406 407 for (bcnt = 0; bcnt < num_to_alloc; bcnt++) { 408 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL); 409 if (!psb) 410 break; 411 412 /* 413 * Get memory from the pci pool to map the virt space to pci 414 * bus space for an I/O. The DMA buffer includes space for the 415 * struct fcp_cmnd, struct fcp_rsp and the number of bde's 416 * necessary to support the sg_tablesize. 417 */ 418 psb->data = pci_pool_zalloc(phba->lpfc_sg_dma_buf_pool, 419 GFP_KERNEL, &psb->dma_handle); 420 if (!psb->data) { 421 kfree(psb); 422 break; 423 } 424 425 426 /* Allocate iotag for psb->cur_iocbq. */ 427 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq); 428 if (iotag == 0) { 429 pci_pool_free(phba->lpfc_sg_dma_buf_pool, 430 psb->data, psb->dma_handle); 431 kfree(psb); 432 break; 433 } 434 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP; 435 436 psb->fcp_cmnd = psb->data; 437 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd); 438 psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) + 439 sizeof(struct fcp_rsp); 440 441 /* Initialize local short-hand pointers. */ 442 bpl = psb->fcp_bpl; 443 pdma_phys_fcp_cmd = psb->dma_handle; 444 pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd); 445 pdma_phys_bpl = psb->dma_handle + sizeof(struct fcp_cmnd) + 446 sizeof(struct fcp_rsp); 447 448 /* 449 * The first two bdes are the FCP_CMD and FCP_RSP. The balance 450 * are sg list bdes. Initialize the first two and leave the 451 * rest for queuecommand. 452 */ 453 bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd)); 454 bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd)); 455 bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd); 456 bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64; 457 bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w); 458 459 /* Setup the physical region for the FCP RSP */ 460 bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp)); 461 bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp)); 462 bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp); 463 bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64; 464 bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w); 465 466 /* 467 * Since the IOCB for the FCP I/O is built into this 468 * lpfc_scsi_buf, initialize it with all known data now. 469 */ 470 iocb = &psb->cur_iocbq.iocb; 471 iocb->un.fcpi64.bdl.ulpIoTag32 = 0; 472 if ((phba->sli_rev == 3) && 473 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) { 474 /* fill in immediate fcp command BDE */ 475 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED; 476 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd); 477 iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t, 478 unsli3.fcp_ext.icd); 479 iocb->un.fcpi64.bdl.addrHigh = 0; 480 iocb->ulpBdeCount = 0; 481 iocb->ulpLe = 0; 482 /* fill in response BDE */ 483 iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags = 484 BUFF_TYPE_BDE_64; 485 iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize = 486 sizeof(struct fcp_rsp); 487 iocb->unsli3.fcp_ext.rbde.addrLow = 488 putPaddrLow(pdma_phys_fcp_rsp); 489 iocb->unsli3.fcp_ext.rbde.addrHigh = 490 putPaddrHigh(pdma_phys_fcp_rsp); 491 } else { 492 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64; 493 iocb->un.fcpi64.bdl.bdeSize = 494 (2 * sizeof(struct ulp_bde64)); 495 iocb->un.fcpi64.bdl.addrLow = 496 putPaddrLow(pdma_phys_bpl); 497 iocb->un.fcpi64.bdl.addrHigh = 498 putPaddrHigh(pdma_phys_bpl); 499 iocb->ulpBdeCount = 1; 500 iocb->ulpLe = 1; 501 } 502 iocb->ulpClass = CLASS3; 503 psb->status = IOSTAT_SUCCESS; 504 /* Put it back into the SCSI buffer list */ 505 psb->cur_iocbq.context1 = psb; 506 lpfc_release_scsi_buf_s3(phba, psb); 507 508 } 509 510 return bcnt; 511 } 512 513 /** 514 * lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport 515 * @vport: pointer to lpfc vport data structure. 516 * 517 * This routine is invoked by the vport cleanup for deletions and the cleanup 518 * for an ndlp on removal. 519 **/ 520 void 521 lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport) 522 { 523 struct lpfc_hba *phba = vport->phba; 524 struct lpfc_scsi_buf *psb, *next_psb; 525 unsigned long iflag = 0; 526 527 if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_FCP)) 528 return; 529 spin_lock_irqsave(&phba->hbalock, iflag); 530 spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock); 531 list_for_each_entry_safe(psb, next_psb, 532 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) { 533 if (psb->rdata && psb->rdata->pnode 534 && psb->rdata->pnode->vport == vport) 535 psb->rdata = NULL; 536 } 537 spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock); 538 spin_unlock_irqrestore(&phba->hbalock, iflag); 539 } 540 541 /** 542 * lpfc_sli4_fcp_xri_aborted - Fast-path process of fcp xri abort 543 * @phba: pointer to lpfc hba data structure. 544 * @axri: pointer to the fcp xri abort wcqe structure. 545 * 546 * This routine is invoked by the worker thread to process a SLI4 fast-path 547 * FCP aborted xri. 548 **/ 549 void 550 lpfc_sli4_fcp_xri_aborted(struct lpfc_hba *phba, 551 struct sli4_wcqe_xri_aborted *axri) 552 { 553 uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri); 554 uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri); 555 struct lpfc_scsi_buf *psb, *next_psb; 556 unsigned long iflag = 0; 557 struct lpfc_iocbq *iocbq; 558 int i; 559 struct lpfc_nodelist *ndlp; 560 int rrq_empty = 0; 561 struct lpfc_sli_ring *pring = phba->sli4_hba.els_wq->pring; 562 563 if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_FCP)) 564 return; 565 spin_lock_irqsave(&phba->hbalock, iflag); 566 spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock); 567 list_for_each_entry_safe(psb, next_psb, 568 &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) { 569 if (psb->cur_iocbq.sli4_xritag == xri) { 570 list_del(&psb->list); 571 psb->exch_busy = 0; 572 psb->status = IOSTAT_SUCCESS; 573 spin_unlock( 574 &phba->sli4_hba.abts_scsi_buf_list_lock); 575 if (psb->rdata && psb->rdata->pnode) 576 ndlp = psb->rdata->pnode; 577 else 578 ndlp = NULL; 579 580 rrq_empty = list_empty(&phba->active_rrq_list); 581 spin_unlock_irqrestore(&phba->hbalock, iflag); 582 if (ndlp) { 583 lpfc_set_rrq_active(phba, ndlp, 584 psb->cur_iocbq.sli4_lxritag, rxid, 1); 585 lpfc_sli4_abts_err_handler(phba, ndlp, axri); 586 } 587 lpfc_release_scsi_buf_s4(phba, psb); 588 if (rrq_empty) 589 lpfc_worker_wake_up(phba); 590 return; 591 } 592 } 593 spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock); 594 for (i = 1; i <= phba->sli.last_iotag; i++) { 595 iocbq = phba->sli.iocbq_lookup[i]; 596 597 if (!(iocbq->iocb_flag & LPFC_IO_FCP) || 598 (iocbq->iocb_flag & LPFC_IO_LIBDFC)) 599 continue; 600 if (iocbq->sli4_xritag != xri) 601 continue; 602 psb = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq); 603 psb->exch_busy = 0; 604 spin_unlock_irqrestore(&phba->hbalock, iflag); 605 if (!list_empty(&pring->txq)) 606 lpfc_worker_wake_up(phba); 607 return; 608 609 } 610 spin_unlock_irqrestore(&phba->hbalock, iflag); 611 } 612 613 /** 614 * lpfc_sli4_post_scsi_sgl_list - Post blocks of scsi buffer sgls from a list 615 * @phba: pointer to lpfc hba data structure. 616 * @post_sblist: pointer to the scsi buffer list. 617 * 618 * This routine walks a list of scsi buffers that was passed in. It attempts 619 * to construct blocks of scsi buffer sgls which contains contiguous xris and 620 * uses the non-embedded SGL block post mailbox commands to post to the port. 621 * For single SCSI buffer sgl with non-contiguous xri, if any, it shall use 622 * embedded SGL post mailbox command for posting. The @post_sblist passed in 623 * must be local list, thus no lock is needed when manipulate the list. 624 * 625 * Returns: 0 = failure, non-zero number of successfully posted buffers. 626 **/ 627 static int 628 lpfc_sli4_post_scsi_sgl_list(struct lpfc_hba *phba, 629 struct list_head *post_sblist, int sb_count) 630 { 631 struct lpfc_scsi_buf *psb, *psb_next; 632 int status, sgl_size; 633 int post_cnt = 0, block_cnt = 0, num_posting = 0, num_posted = 0; 634 dma_addr_t pdma_phys_bpl1; 635 int last_xritag = NO_XRI; 636 LIST_HEAD(prep_sblist); 637 LIST_HEAD(blck_sblist); 638 LIST_HEAD(scsi_sblist); 639 640 /* sanity check */ 641 if (sb_count <= 0) 642 return -EINVAL; 643 644 sgl_size = phba->cfg_sg_dma_buf_size - 645 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp)); 646 647 list_for_each_entry_safe(psb, psb_next, post_sblist, list) { 648 list_del_init(&psb->list); 649 block_cnt++; 650 if ((last_xritag != NO_XRI) && 651 (psb->cur_iocbq.sli4_xritag != last_xritag + 1)) { 652 /* a hole in xri block, form a sgl posting block */ 653 list_splice_init(&prep_sblist, &blck_sblist); 654 post_cnt = block_cnt - 1; 655 /* prepare list for next posting block */ 656 list_add_tail(&psb->list, &prep_sblist); 657 block_cnt = 1; 658 } else { 659 /* prepare list for next posting block */ 660 list_add_tail(&psb->list, &prep_sblist); 661 /* enough sgls for non-embed sgl mbox command */ 662 if (block_cnt == LPFC_NEMBED_MBOX_SGL_CNT) { 663 list_splice_init(&prep_sblist, &blck_sblist); 664 post_cnt = block_cnt; 665 block_cnt = 0; 666 } 667 } 668 num_posting++; 669 last_xritag = psb->cur_iocbq.sli4_xritag; 670 671 /* end of repost sgl list condition for SCSI buffers */ 672 if (num_posting == sb_count) { 673 if (post_cnt == 0) { 674 /* last sgl posting block */ 675 list_splice_init(&prep_sblist, &blck_sblist); 676 post_cnt = block_cnt; 677 } else if (block_cnt == 1) { 678 /* last single sgl with non-contiguous xri */ 679 if (sgl_size > SGL_PAGE_SIZE) 680 pdma_phys_bpl1 = psb->dma_phys_bpl + 681 SGL_PAGE_SIZE; 682 else 683 pdma_phys_bpl1 = 0; 684 status = lpfc_sli4_post_sgl(phba, 685 psb->dma_phys_bpl, 686 pdma_phys_bpl1, 687 psb->cur_iocbq.sli4_xritag); 688 if (status) { 689 /* failure, put on abort scsi list */ 690 psb->exch_busy = 1; 691 } else { 692 /* success, put on SCSI buffer list */ 693 psb->exch_busy = 0; 694 psb->status = IOSTAT_SUCCESS; 695 num_posted++; 696 } 697 /* success, put on SCSI buffer sgl list */ 698 list_add_tail(&psb->list, &scsi_sblist); 699 } 700 } 701 702 /* continue until a nembed page worth of sgls */ 703 if (post_cnt == 0) 704 continue; 705 706 /* post block of SCSI buffer list sgls */ 707 status = lpfc_sli4_post_scsi_sgl_block(phba, &blck_sblist, 708 post_cnt); 709 710 /* don't reset xirtag due to hole in xri block */ 711 if (block_cnt == 0) 712 last_xritag = NO_XRI; 713 714 /* reset SCSI buffer post count for next round of posting */ 715 post_cnt = 0; 716 717 /* put posted SCSI buffer-sgl posted on SCSI buffer sgl list */ 718 while (!list_empty(&blck_sblist)) { 719 list_remove_head(&blck_sblist, psb, 720 struct lpfc_scsi_buf, list); 721 if (status) { 722 /* failure, put on abort scsi list */ 723 psb->exch_busy = 1; 724 } else { 725 /* success, put on SCSI buffer list */ 726 psb->exch_busy = 0; 727 psb->status = IOSTAT_SUCCESS; 728 num_posted++; 729 } 730 list_add_tail(&psb->list, &scsi_sblist); 731 } 732 } 733 /* Push SCSI buffers with sgl posted to the availble list */ 734 while (!list_empty(&scsi_sblist)) { 735 list_remove_head(&scsi_sblist, psb, 736 struct lpfc_scsi_buf, list); 737 lpfc_release_scsi_buf_s4(phba, psb); 738 } 739 return num_posted; 740 } 741 742 /** 743 * lpfc_sli4_repost_scsi_sgl_list - Repost all the allocated scsi buffer sgls 744 * @phba: pointer to lpfc hba data structure. 745 * 746 * This routine walks the list of scsi buffers that have been allocated and 747 * repost them to the port by using SGL block post. This is needed after a 748 * pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine 749 * is responsible for moving all scsi buffers on the lpfc_abts_scsi_sgl_list 750 * to the lpfc_scsi_buf_list. If the repost fails, reject all scsi buffers. 751 * 752 * Returns: 0 = success, non-zero failure. 753 **/ 754 int 755 lpfc_sli4_repost_scsi_sgl_list(struct lpfc_hba *phba) 756 { 757 LIST_HEAD(post_sblist); 758 int num_posted, rc = 0; 759 760 /* get all SCSI buffers need to repost to a local list */ 761 spin_lock_irq(&phba->scsi_buf_list_get_lock); 762 spin_lock(&phba->scsi_buf_list_put_lock); 763 list_splice_init(&phba->lpfc_scsi_buf_list_get, &post_sblist); 764 list_splice(&phba->lpfc_scsi_buf_list_put, &post_sblist); 765 spin_unlock(&phba->scsi_buf_list_put_lock); 766 spin_unlock_irq(&phba->scsi_buf_list_get_lock); 767 768 /* post the list of scsi buffer sgls to port if available */ 769 if (!list_empty(&post_sblist)) { 770 num_posted = lpfc_sli4_post_scsi_sgl_list(phba, &post_sblist, 771 phba->sli4_hba.scsi_xri_cnt); 772 /* failed to post any scsi buffer, return error */ 773 if (num_posted == 0) 774 rc = -EIO; 775 } 776 return rc; 777 } 778 779 /** 780 * lpfc_new_scsi_buf_s4 - Scsi buffer allocator for HBA with SLI4 IF spec 781 * @vport: The virtual port for which this call being executed. 782 * @num_to_allocate: The requested number of buffers to allocate. 783 * 784 * This routine allocates scsi buffers for device with SLI-4 interface spec, 785 * the scsi buffer contains all the necessary information needed to initiate 786 * a SCSI I/O. After allocating up to @num_to_allocate SCSI buffers and put 787 * them on a list, it post them to the port by using SGL block post. 788 * 789 * Return codes: 790 * int - number of scsi buffers that were allocated and posted. 791 * 0 = failure, less than num_to_alloc is a partial failure. 792 **/ 793 static int 794 lpfc_new_scsi_buf_s4(struct lpfc_vport *vport, int num_to_alloc) 795 { 796 struct lpfc_hba *phba = vport->phba; 797 struct lpfc_scsi_buf *psb; 798 struct sli4_sge *sgl; 799 IOCB_t *iocb; 800 dma_addr_t pdma_phys_fcp_cmd; 801 dma_addr_t pdma_phys_fcp_rsp; 802 dma_addr_t pdma_phys_bpl; 803 uint16_t iotag, lxri = 0; 804 int bcnt, num_posted, sgl_size; 805 LIST_HEAD(prep_sblist); 806 LIST_HEAD(post_sblist); 807 LIST_HEAD(scsi_sblist); 808 809 sgl_size = phba->cfg_sg_dma_buf_size - 810 (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp)); 811 812 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 813 "9068 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n", 814 num_to_alloc, phba->cfg_sg_dma_buf_size, sgl_size, 815 (int)sizeof(struct fcp_cmnd), 816 (int)sizeof(struct fcp_rsp)); 817 818 for (bcnt = 0; bcnt < num_to_alloc; bcnt++) { 819 psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL); 820 if (!psb) 821 break; 822 /* 823 * Get memory from the pci pool to map the virt space to 824 * pci bus space for an I/O. The DMA buffer includes space 825 * for the struct fcp_cmnd, struct fcp_rsp and the number 826 * of bde's necessary to support the sg_tablesize. 827 */ 828 psb->data = pci_pool_zalloc(phba->lpfc_sg_dma_buf_pool, 829 GFP_KERNEL, &psb->dma_handle); 830 if (!psb->data) { 831 kfree(psb); 832 break; 833 } 834 835 /* 836 * 4K Page alignment is CRITICAL to BlockGuard, double check 837 * to be sure. 838 */ 839 if (phba->cfg_enable_bg && (((unsigned long)(psb->data) & 840 (unsigned long)(SLI4_PAGE_SIZE - 1)) != 0)) { 841 pci_pool_free(phba->lpfc_sg_dma_buf_pool, 842 psb->data, psb->dma_handle); 843 kfree(psb); 844 break; 845 } 846 847 848 lxri = lpfc_sli4_next_xritag(phba); 849 if (lxri == NO_XRI) { 850 pci_pool_free(phba->lpfc_sg_dma_buf_pool, 851 psb->data, psb->dma_handle); 852 kfree(psb); 853 break; 854 } 855 856 /* Allocate iotag for psb->cur_iocbq. */ 857 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq); 858 if (iotag == 0) { 859 pci_pool_free(phba->lpfc_sg_dma_buf_pool, 860 psb->data, psb->dma_handle); 861 kfree(psb); 862 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 863 "3368 Failed to allocate IOTAG for" 864 " XRI:0x%x\n", lxri); 865 lpfc_sli4_free_xri(phba, lxri); 866 break; 867 } 868 psb->cur_iocbq.sli4_lxritag = lxri; 869 psb->cur_iocbq.sli4_xritag = phba->sli4_hba.xri_ids[lxri]; 870 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP; 871 psb->fcp_bpl = psb->data; 872 psb->fcp_cmnd = (psb->data + sgl_size); 873 psb->fcp_rsp = (struct fcp_rsp *)((uint8_t *)psb->fcp_cmnd + 874 sizeof(struct fcp_cmnd)); 875 876 /* Initialize local short-hand pointers. */ 877 sgl = (struct sli4_sge *)psb->fcp_bpl; 878 pdma_phys_bpl = psb->dma_handle; 879 pdma_phys_fcp_cmd = (psb->dma_handle + sgl_size); 880 pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd); 881 882 /* 883 * The first two bdes are the FCP_CMD and FCP_RSP. 884 * The balance are sg list bdes. Initialize the 885 * first two and leave the rest for queuecommand. 886 */ 887 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd)); 888 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd)); 889 sgl->word2 = le32_to_cpu(sgl->word2); 890 bf_set(lpfc_sli4_sge_last, sgl, 0); 891 sgl->word2 = cpu_to_le32(sgl->word2); 892 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd)); 893 sgl++; 894 895 /* Setup the physical region for the FCP RSP */ 896 sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp)); 897 sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp)); 898 sgl->word2 = le32_to_cpu(sgl->word2); 899 bf_set(lpfc_sli4_sge_last, sgl, 1); 900 sgl->word2 = cpu_to_le32(sgl->word2); 901 sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp)); 902 903 /* 904 * Since the IOCB for the FCP I/O is built into this 905 * lpfc_scsi_buf, initialize it with all known data now. 906 */ 907 iocb = &psb->cur_iocbq.iocb; 908 iocb->un.fcpi64.bdl.ulpIoTag32 = 0; 909 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_64; 910 /* setting the BLP size to 2 * sizeof BDE may not be correct. 911 * We are setting the bpl to point to out sgl. An sgl's 912 * entries are 16 bytes, a bpl entries are 12 bytes. 913 */ 914 iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd); 915 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_fcp_cmd); 916 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_fcp_cmd); 917 iocb->ulpBdeCount = 1; 918 iocb->ulpLe = 1; 919 iocb->ulpClass = CLASS3; 920 psb->cur_iocbq.context1 = psb; 921 psb->dma_phys_bpl = pdma_phys_bpl; 922 923 /* add the scsi buffer to a post list */ 924 list_add_tail(&psb->list, &post_sblist); 925 spin_lock_irq(&phba->scsi_buf_list_get_lock); 926 phba->sli4_hba.scsi_xri_cnt++; 927 spin_unlock_irq(&phba->scsi_buf_list_get_lock); 928 } 929 lpfc_printf_log(phba, KERN_INFO, LOG_BG | LOG_FCP, 930 "3021 Allocate %d out of %d requested new SCSI " 931 "buffers\n", bcnt, num_to_alloc); 932 933 /* post the list of scsi buffer sgls to port if available */ 934 if (!list_empty(&post_sblist)) 935 num_posted = lpfc_sli4_post_scsi_sgl_list(phba, 936 &post_sblist, bcnt); 937 else 938 num_posted = 0; 939 940 return num_posted; 941 } 942 943 /** 944 * lpfc_new_scsi_buf - Wrapper funciton for scsi buffer allocator 945 * @vport: The virtual port for which this call being executed. 946 * @num_to_allocate: The requested number of buffers to allocate. 947 * 948 * This routine wraps the actual SCSI buffer allocator function pointer from 949 * the lpfc_hba struct. 950 * 951 * Return codes: 952 * int - number of scsi buffers that were allocated. 953 * 0 = failure, less than num_to_alloc is a partial failure. 954 **/ 955 static inline int 956 lpfc_new_scsi_buf(struct lpfc_vport *vport, int num_to_alloc) 957 { 958 return vport->phba->lpfc_new_scsi_buf(vport, num_to_alloc); 959 } 960 961 /** 962 * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA 963 * @phba: The HBA for which this call is being executed. 964 * 965 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list 966 * and returns to caller. 967 * 968 * Return codes: 969 * NULL - Error 970 * Pointer to lpfc_scsi_buf - Success 971 **/ 972 static struct lpfc_scsi_buf* 973 lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) 974 { 975 struct lpfc_scsi_buf * lpfc_cmd = NULL; 976 struct list_head *scsi_buf_list_get = &phba->lpfc_scsi_buf_list_get; 977 unsigned long iflag = 0; 978 979 spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag); 980 list_remove_head(scsi_buf_list_get, lpfc_cmd, struct lpfc_scsi_buf, 981 list); 982 if (!lpfc_cmd) { 983 spin_lock(&phba->scsi_buf_list_put_lock); 984 list_splice(&phba->lpfc_scsi_buf_list_put, 985 &phba->lpfc_scsi_buf_list_get); 986 INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put); 987 list_remove_head(scsi_buf_list_get, lpfc_cmd, 988 struct lpfc_scsi_buf, list); 989 spin_unlock(&phba->scsi_buf_list_put_lock); 990 } 991 spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag); 992 return lpfc_cmd; 993 } 994 /** 995 * lpfc_get_scsi_buf_s4 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA 996 * @phba: The HBA for which this call is being executed. 997 * 998 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list 999 * and returns to caller. 1000 * 1001 * Return codes: 1002 * NULL - Error 1003 * Pointer to lpfc_scsi_buf - Success 1004 **/ 1005 static struct lpfc_scsi_buf* 1006 lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) 1007 { 1008 struct lpfc_scsi_buf *lpfc_cmd, *lpfc_cmd_next; 1009 unsigned long iflag = 0; 1010 int found = 0; 1011 1012 spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag); 1013 list_for_each_entry_safe(lpfc_cmd, lpfc_cmd_next, 1014 &phba->lpfc_scsi_buf_list_get, list) { 1015 if (lpfc_test_rrq_active(phba, ndlp, 1016 lpfc_cmd->cur_iocbq.sli4_lxritag)) 1017 continue; 1018 list_del(&lpfc_cmd->list); 1019 found = 1; 1020 break; 1021 } 1022 if (!found) { 1023 spin_lock(&phba->scsi_buf_list_put_lock); 1024 list_splice(&phba->lpfc_scsi_buf_list_put, 1025 &phba->lpfc_scsi_buf_list_get); 1026 INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put); 1027 spin_unlock(&phba->scsi_buf_list_put_lock); 1028 list_for_each_entry_safe(lpfc_cmd, lpfc_cmd_next, 1029 &phba->lpfc_scsi_buf_list_get, list) { 1030 if (lpfc_test_rrq_active( 1031 phba, ndlp, lpfc_cmd->cur_iocbq.sli4_lxritag)) 1032 continue; 1033 list_del(&lpfc_cmd->list); 1034 found = 1; 1035 break; 1036 } 1037 } 1038 spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag); 1039 if (!found) 1040 return NULL; 1041 return lpfc_cmd; 1042 } 1043 /** 1044 * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA 1045 * @phba: The HBA for which this call is being executed. 1046 * 1047 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list 1048 * and returns to caller. 1049 * 1050 * Return codes: 1051 * NULL - Error 1052 * Pointer to lpfc_scsi_buf - Success 1053 **/ 1054 static struct lpfc_scsi_buf* 1055 lpfc_get_scsi_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) 1056 { 1057 return phba->lpfc_get_scsi_buf(phba, ndlp); 1058 } 1059 1060 /** 1061 * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list 1062 * @phba: The Hba for which this call is being executed. 1063 * @psb: The scsi buffer which is being released. 1064 * 1065 * This routine releases @psb scsi buffer by adding it to tail of @phba 1066 * lpfc_scsi_buf_list list. 1067 **/ 1068 static void 1069 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 1070 { 1071 unsigned long iflag = 0; 1072 1073 psb->seg_cnt = 0; 1074 psb->nonsg_phys = 0; 1075 psb->prot_seg_cnt = 0; 1076 1077 spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag); 1078 psb->pCmd = NULL; 1079 psb->cur_iocbq.iocb_flag = LPFC_IO_FCP; 1080 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put); 1081 spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag); 1082 } 1083 1084 /** 1085 * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list. 1086 * @phba: The Hba for which this call is being executed. 1087 * @psb: The scsi buffer which is being released. 1088 * 1089 * This routine releases @psb scsi buffer by adding it to tail of @phba 1090 * lpfc_scsi_buf_list list. For SLI4 XRI's are tied to the scsi buffer 1091 * and cannot be reused for at least RA_TOV amount of time if it was 1092 * aborted. 1093 **/ 1094 static void 1095 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 1096 { 1097 unsigned long iflag = 0; 1098 1099 psb->seg_cnt = 0; 1100 psb->nonsg_phys = 0; 1101 psb->prot_seg_cnt = 0; 1102 1103 if (psb->exch_busy) { 1104 spin_lock_irqsave(&phba->sli4_hba.abts_scsi_buf_list_lock, 1105 iflag); 1106 psb->pCmd = NULL; 1107 list_add_tail(&psb->list, 1108 &phba->sli4_hba.lpfc_abts_scsi_buf_list); 1109 spin_unlock_irqrestore(&phba->sli4_hba.abts_scsi_buf_list_lock, 1110 iflag); 1111 } else { 1112 psb->pCmd = NULL; 1113 psb->cur_iocbq.iocb_flag = LPFC_IO_FCP; 1114 spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag); 1115 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put); 1116 spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag); 1117 } 1118 } 1119 1120 /** 1121 * lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list. 1122 * @phba: The Hba for which this call is being executed. 1123 * @psb: The scsi buffer which is being released. 1124 * 1125 * This routine releases @psb scsi buffer by adding it to tail of @phba 1126 * lpfc_scsi_buf_list list. 1127 **/ 1128 static void 1129 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 1130 { 1131 1132 phba->lpfc_release_scsi_buf(phba, psb); 1133 } 1134 1135 /** 1136 * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec 1137 * @phba: The Hba for which this call is being executed. 1138 * @lpfc_cmd: The scsi buffer which is going to be mapped. 1139 * 1140 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd 1141 * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans 1142 * through sg elements and format the bde. This routine also initializes all 1143 * IOCB fields which are dependent on scsi command request buffer. 1144 * 1145 * Return codes: 1146 * 1 - Error 1147 * 0 - Success 1148 **/ 1149 static int 1150 lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 1151 { 1152 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 1153 struct scatterlist *sgel = NULL; 1154 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 1155 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl; 1156 struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq; 1157 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 1158 struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde; 1159 dma_addr_t physaddr; 1160 uint32_t num_bde = 0; 1161 int nseg, datadir = scsi_cmnd->sc_data_direction; 1162 1163 /* 1164 * There are three possibilities here - use scatter-gather segment, use 1165 * the single mapping, or neither. Start the lpfc command prep by 1166 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first 1167 * data bde entry. 1168 */ 1169 bpl += 2; 1170 if (scsi_sg_count(scsi_cmnd)) { 1171 /* 1172 * The driver stores the segment count returned from pci_map_sg 1173 * because this a count of dma-mappings used to map the use_sg 1174 * pages. They are not guaranteed to be the same for those 1175 * architectures that implement an IOMMU. 1176 */ 1177 1178 nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd), 1179 scsi_sg_count(scsi_cmnd), datadir); 1180 if (unlikely(!nseg)) 1181 return 1; 1182 1183 lpfc_cmd->seg_cnt = nseg; 1184 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { 1185 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1186 "9064 BLKGRD: %s: Too many sg segments from " 1187 "dma_map_sg. Config %d, seg_cnt %d\n", 1188 __func__, phba->cfg_sg_seg_cnt, 1189 lpfc_cmd->seg_cnt); 1190 lpfc_cmd->seg_cnt = 0; 1191 scsi_dma_unmap(scsi_cmnd); 1192 return 1; 1193 } 1194 1195 /* 1196 * The driver established a maximum scatter-gather segment count 1197 * during probe that limits the number of sg elements in any 1198 * single scsi command. Just run through the seg_cnt and format 1199 * the bde's. 1200 * When using SLI-3 the driver will try to fit all the BDEs into 1201 * the IOCB. If it can't then the BDEs get added to a BPL as it 1202 * does for SLI-2 mode. 1203 */ 1204 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) { 1205 physaddr = sg_dma_address(sgel); 1206 if (phba->sli_rev == 3 && 1207 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) && 1208 !(iocbq->iocb_flag & DSS_SECURITY_OP) && 1209 nseg <= LPFC_EXT_DATA_BDE_COUNT) { 1210 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 1211 data_bde->tus.f.bdeSize = sg_dma_len(sgel); 1212 data_bde->addrLow = putPaddrLow(physaddr); 1213 data_bde->addrHigh = putPaddrHigh(physaddr); 1214 data_bde++; 1215 } else { 1216 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 1217 bpl->tus.f.bdeSize = sg_dma_len(sgel); 1218 bpl->tus.w = le32_to_cpu(bpl->tus.w); 1219 bpl->addrLow = 1220 le32_to_cpu(putPaddrLow(physaddr)); 1221 bpl->addrHigh = 1222 le32_to_cpu(putPaddrHigh(physaddr)); 1223 bpl++; 1224 } 1225 } 1226 } 1227 1228 /* 1229 * Finish initializing those IOCB fields that are dependent on the 1230 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is 1231 * explicitly reinitialized and for SLI-3 the extended bde count is 1232 * explicitly reinitialized since all iocb memory resources are reused. 1233 */ 1234 if (phba->sli_rev == 3 && 1235 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) && 1236 !(iocbq->iocb_flag & DSS_SECURITY_OP)) { 1237 if (num_bde > LPFC_EXT_DATA_BDE_COUNT) { 1238 /* 1239 * The extended IOCB format can only fit 3 BDE or a BPL. 1240 * This I/O has more than 3 BDE so the 1st data bde will 1241 * be a BPL that is filled in here. 1242 */ 1243 physaddr = lpfc_cmd->dma_handle; 1244 data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64; 1245 data_bde->tus.f.bdeSize = (num_bde * 1246 sizeof(struct ulp_bde64)); 1247 physaddr += (sizeof(struct fcp_cmnd) + 1248 sizeof(struct fcp_rsp) + 1249 (2 * sizeof(struct ulp_bde64))); 1250 data_bde->addrHigh = putPaddrHigh(physaddr); 1251 data_bde->addrLow = putPaddrLow(physaddr); 1252 /* ebde count includes the response bde and data bpl */ 1253 iocb_cmd->unsli3.fcp_ext.ebde_count = 2; 1254 } else { 1255 /* ebde count includes the response bde and data bdes */ 1256 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1); 1257 } 1258 } else { 1259 iocb_cmd->un.fcpi64.bdl.bdeSize = 1260 ((num_bde + 2) * sizeof(struct ulp_bde64)); 1261 iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1); 1262 } 1263 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd)); 1264 1265 /* 1266 * Due to difference in data length between DIF/non-DIF paths, 1267 * we need to set word 4 of IOCB here 1268 */ 1269 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd); 1270 return 0; 1271 } 1272 1273 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 1274 1275 /* Return BG_ERR_INIT if error injection is detected by Initiator */ 1276 #define BG_ERR_INIT 0x1 1277 /* Return BG_ERR_TGT if error injection is detected by Target */ 1278 #define BG_ERR_TGT 0x2 1279 /* Return BG_ERR_SWAP if swapping CSUM<-->CRC is required for error injection */ 1280 #define BG_ERR_SWAP 0x10 1281 /** 1282 * Return BG_ERR_CHECK if disabling Guard/Ref/App checking is required for 1283 * error injection 1284 **/ 1285 #define BG_ERR_CHECK 0x20 1286 1287 /** 1288 * lpfc_bg_err_inject - Determine if we should inject an error 1289 * @phba: The Hba for which this call is being executed. 1290 * @sc: The SCSI command to examine 1291 * @reftag: (out) BlockGuard reference tag for transmitted data 1292 * @apptag: (out) BlockGuard application tag for transmitted data 1293 * @new_guard (in) Value to replace CRC with if needed 1294 * 1295 * Returns BG_ERR_* bit mask or 0 if request ignored 1296 **/ 1297 static int 1298 lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1299 uint32_t *reftag, uint16_t *apptag, uint32_t new_guard) 1300 { 1301 struct scatterlist *sgpe; /* s/g prot entry */ 1302 struct lpfc_scsi_buf *lpfc_cmd = NULL; 1303 struct scsi_dif_tuple *src = NULL; 1304 struct lpfc_nodelist *ndlp; 1305 struct lpfc_rport_data *rdata; 1306 uint32_t op = scsi_get_prot_op(sc); 1307 uint32_t blksize; 1308 uint32_t numblks; 1309 sector_t lba; 1310 int rc = 0; 1311 int blockoff = 0; 1312 1313 if (op == SCSI_PROT_NORMAL) 1314 return 0; 1315 1316 sgpe = scsi_prot_sglist(sc); 1317 lba = scsi_get_lba(sc); 1318 1319 /* First check if we need to match the LBA */ 1320 if (phba->lpfc_injerr_lba != LPFC_INJERR_LBA_OFF) { 1321 blksize = lpfc_cmd_blksize(sc); 1322 numblks = (scsi_bufflen(sc) + blksize - 1) / blksize; 1323 1324 /* Make sure we have the right LBA if one is specified */ 1325 if ((phba->lpfc_injerr_lba < lba) || 1326 (phba->lpfc_injerr_lba >= (lba + numblks))) 1327 return 0; 1328 if (sgpe) { 1329 blockoff = phba->lpfc_injerr_lba - lba; 1330 numblks = sg_dma_len(sgpe) / 1331 sizeof(struct scsi_dif_tuple); 1332 if (numblks < blockoff) 1333 blockoff = numblks; 1334 } 1335 } 1336 1337 /* Next check if we need to match the remote NPortID or WWPN */ 1338 rdata = lpfc_rport_data_from_scsi_device(sc->device); 1339 if (rdata && rdata->pnode) { 1340 ndlp = rdata->pnode; 1341 1342 /* Make sure we have the right NPortID if one is specified */ 1343 if (phba->lpfc_injerr_nportid && 1344 (phba->lpfc_injerr_nportid != ndlp->nlp_DID)) 1345 return 0; 1346 1347 /* 1348 * Make sure we have the right WWPN if one is specified. 1349 * wwn[0] should be a non-zero NAA in a good WWPN. 1350 */ 1351 if (phba->lpfc_injerr_wwpn.u.wwn[0] && 1352 (memcmp(&ndlp->nlp_portname, &phba->lpfc_injerr_wwpn, 1353 sizeof(struct lpfc_name)) != 0)) 1354 return 0; 1355 } 1356 1357 /* Setup a ptr to the protection data if the SCSI host provides it */ 1358 if (sgpe) { 1359 src = (struct scsi_dif_tuple *)sg_virt(sgpe); 1360 src += blockoff; 1361 lpfc_cmd = (struct lpfc_scsi_buf *)sc->host_scribble; 1362 } 1363 1364 /* Should we change the Reference Tag */ 1365 if (reftag) { 1366 if (phba->lpfc_injerr_wref_cnt) { 1367 switch (op) { 1368 case SCSI_PROT_WRITE_PASS: 1369 if (src) { 1370 /* 1371 * For WRITE_PASS, force the error 1372 * to be sent on the wire. It should 1373 * be detected by the Target. 1374 * If blockoff != 0 error will be 1375 * inserted in middle of the IO. 1376 */ 1377 1378 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1379 "9076 BLKGRD: Injecting reftag error: " 1380 "write lba x%lx + x%x oldrefTag x%x\n", 1381 (unsigned long)lba, blockoff, 1382 be32_to_cpu(src->ref_tag)); 1383 1384 /* 1385 * Save the old ref_tag so we can 1386 * restore it on completion. 1387 */ 1388 if (lpfc_cmd) { 1389 lpfc_cmd->prot_data_type = 1390 LPFC_INJERR_REFTAG; 1391 lpfc_cmd->prot_data_segment = 1392 src; 1393 lpfc_cmd->prot_data = 1394 src->ref_tag; 1395 } 1396 src->ref_tag = cpu_to_be32(0xDEADBEEF); 1397 phba->lpfc_injerr_wref_cnt--; 1398 if (phba->lpfc_injerr_wref_cnt == 0) { 1399 phba->lpfc_injerr_nportid = 0; 1400 phba->lpfc_injerr_lba = 1401 LPFC_INJERR_LBA_OFF; 1402 memset(&phba->lpfc_injerr_wwpn, 1403 0, sizeof(struct lpfc_name)); 1404 } 1405 rc = BG_ERR_TGT | BG_ERR_CHECK; 1406 1407 break; 1408 } 1409 /* Drop thru */ 1410 case SCSI_PROT_WRITE_INSERT: 1411 /* 1412 * For WRITE_INSERT, force the error 1413 * to be sent on the wire. It should be 1414 * detected by the Target. 1415 */ 1416 /* DEADBEEF will be the reftag on the wire */ 1417 *reftag = 0xDEADBEEF; 1418 phba->lpfc_injerr_wref_cnt--; 1419 if (phba->lpfc_injerr_wref_cnt == 0) { 1420 phba->lpfc_injerr_nportid = 0; 1421 phba->lpfc_injerr_lba = 1422 LPFC_INJERR_LBA_OFF; 1423 memset(&phba->lpfc_injerr_wwpn, 1424 0, sizeof(struct lpfc_name)); 1425 } 1426 rc = BG_ERR_TGT | BG_ERR_CHECK; 1427 1428 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1429 "9078 BLKGRD: Injecting reftag error: " 1430 "write lba x%lx\n", (unsigned long)lba); 1431 break; 1432 case SCSI_PROT_WRITE_STRIP: 1433 /* 1434 * For WRITE_STRIP and WRITE_PASS, 1435 * force the error on data 1436 * being copied from SLI-Host to SLI-Port. 1437 */ 1438 *reftag = 0xDEADBEEF; 1439 phba->lpfc_injerr_wref_cnt--; 1440 if (phba->lpfc_injerr_wref_cnt == 0) { 1441 phba->lpfc_injerr_nportid = 0; 1442 phba->lpfc_injerr_lba = 1443 LPFC_INJERR_LBA_OFF; 1444 memset(&phba->lpfc_injerr_wwpn, 1445 0, sizeof(struct lpfc_name)); 1446 } 1447 rc = BG_ERR_INIT; 1448 1449 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1450 "9077 BLKGRD: Injecting reftag error: " 1451 "write lba x%lx\n", (unsigned long)lba); 1452 break; 1453 } 1454 } 1455 if (phba->lpfc_injerr_rref_cnt) { 1456 switch (op) { 1457 case SCSI_PROT_READ_INSERT: 1458 case SCSI_PROT_READ_STRIP: 1459 case SCSI_PROT_READ_PASS: 1460 /* 1461 * For READ_STRIP and READ_PASS, force the 1462 * error on data being read off the wire. It 1463 * should force an IO error to the driver. 1464 */ 1465 *reftag = 0xDEADBEEF; 1466 phba->lpfc_injerr_rref_cnt--; 1467 if (phba->lpfc_injerr_rref_cnt == 0) { 1468 phba->lpfc_injerr_nportid = 0; 1469 phba->lpfc_injerr_lba = 1470 LPFC_INJERR_LBA_OFF; 1471 memset(&phba->lpfc_injerr_wwpn, 1472 0, sizeof(struct lpfc_name)); 1473 } 1474 rc = BG_ERR_INIT; 1475 1476 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1477 "9079 BLKGRD: Injecting reftag error: " 1478 "read lba x%lx\n", (unsigned long)lba); 1479 break; 1480 } 1481 } 1482 } 1483 1484 /* Should we change the Application Tag */ 1485 if (apptag) { 1486 if (phba->lpfc_injerr_wapp_cnt) { 1487 switch (op) { 1488 case SCSI_PROT_WRITE_PASS: 1489 if (src) { 1490 /* 1491 * For WRITE_PASS, force the error 1492 * to be sent on the wire. It should 1493 * be detected by the Target. 1494 * If blockoff != 0 error will be 1495 * inserted in middle of the IO. 1496 */ 1497 1498 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1499 "9080 BLKGRD: Injecting apptag error: " 1500 "write lba x%lx + x%x oldappTag x%x\n", 1501 (unsigned long)lba, blockoff, 1502 be16_to_cpu(src->app_tag)); 1503 1504 /* 1505 * Save the old app_tag so we can 1506 * restore it on completion. 1507 */ 1508 if (lpfc_cmd) { 1509 lpfc_cmd->prot_data_type = 1510 LPFC_INJERR_APPTAG; 1511 lpfc_cmd->prot_data_segment = 1512 src; 1513 lpfc_cmd->prot_data = 1514 src->app_tag; 1515 } 1516 src->app_tag = cpu_to_be16(0xDEAD); 1517 phba->lpfc_injerr_wapp_cnt--; 1518 if (phba->lpfc_injerr_wapp_cnt == 0) { 1519 phba->lpfc_injerr_nportid = 0; 1520 phba->lpfc_injerr_lba = 1521 LPFC_INJERR_LBA_OFF; 1522 memset(&phba->lpfc_injerr_wwpn, 1523 0, sizeof(struct lpfc_name)); 1524 } 1525 rc = BG_ERR_TGT | BG_ERR_CHECK; 1526 break; 1527 } 1528 /* Drop thru */ 1529 case SCSI_PROT_WRITE_INSERT: 1530 /* 1531 * For WRITE_INSERT, force the 1532 * error to be sent on the wire. It should be 1533 * detected by the Target. 1534 */ 1535 /* DEAD will be the apptag on the wire */ 1536 *apptag = 0xDEAD; 1537 phba->lpfc_injerr_wapp_cnt--; 1538 if (phba->lpfc_injerr_wapp_cnt == 0) { 1539 phba->lpfc_injerr_nportid = 0; 1540 phba->lpfc_injerr_lba = 1541 LPFC_INJERR_LBA_OFF; 1542 memset(&phba->lpfc_injerr_wwpn, 1543 0, sizeof(struct lpfc_name)); 1544 } 1545 rc = BG_ERR_TGT | BG_ERR_CHECK; 1546 1547 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1548 "0813 BLKGRD: Injecting apptag error: " 1549 "write lba x%lx\n", (unsigned long)lba); 1550 break; 1551 case SCSI_PROT_WRITE_STRIP: 1552 /* 1553 * For WRITE_STRIP and WRITE_PASS, 1554 * force the error on data 1555 * being copied from SLI-Host to SLI-Port. 1556 */ 1557 *apptag = 0xDEAD; 1558 phba->lpfc_injerr_wapp_cnt--; 1559 if (phba->lpfc_injerr_wapp_cnt == 0) { 1560 phba->lpfc_injerr_nportid = 0; 1561 phba->lpfc_injerr_lba = 1562 LPFC_INJERR_LBA_OFF; 1563 memset(&phba->lpfc_injerr_wwpn, 1564 0, sizeof(struct lpfc_name)); 1565 } 1566 rc = BG_ERR_INIT; 1567 1568 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1569 "0812 BLKGRD: Injecting apptag error: " 1570 "write lba x%lx\n", (unsigned long)lba); 1571 break; 1572 } 1573 } 1574 if (phba->lpfc_injerr_rapp_cnt) { 1575 switch (op) { 1576 case SCSI_PROT_READ_INSERT: 1577 case SCSI_PROT_READ_STRIP: 1578 case SCSI_PROT_READ_PASS: 1579 /* 1580 * For READ_STRIP and READ_PASS, force the 1581 * error on data being read off the wire. It 1582 * should force an IO error to the driver. 1583 */ 1584 *apptag = 0xDEAD; 1585 phba->lpfc_injerr_rapp_cnt--; 1586 if (phba->lpfc_injerr_rapp_cnt == 0) { 1587 phba->lpfc_injerr_nportid = 0; 1588 phba->lpfc_injerr_lba = 1589 LPFC_INJERR_LBA_OFF; 1590 memset(&phba->lpfc_injerr_wwpn, 1591 0, sizeof(struct lpfc_name)); 1592 } 1593 rc = BG_ERR_INIT; 1594 1595 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1596 "0814 BLKGRD: Injecting apptag error: " 1597 "read lba x%lx\n", (unsigned long)lba); 1598 break; 1599 } 1600 } 1601 } 1602 1603 1604 /* Should we change the Guard Tag */ 1605 if (new_guard) { 1606 if (phba->lpfc_injerr_wgrd_cnt) { 1607 switch (op) { 1608 case SCSI_PROT_WRITE_PASS: 1609 rc = BG_ERR_CHECK; 1610 /* Drop thru */ 1611 1612 case SCSI_PROT_WRITE_INSERT: 1613 /* 1614 * For WRITE_INSERT, force the 1615 * error to be sent on the wire. It should be 1616 * detected by the Target. 1617 */ 1618 phba->lpfc_injerr_wgrd_cnt--; 1619 if (phba->lpfc_injerr_wgrd_cnt == 0) { 1620 phba->lpfc_injerr_nportid = 0; 1621 phba->lpfc_injerr_lba = 1622 LPFC_INJERR_LBA_OFF; 1623 memset(&phba->lpfc_injerr_wwpn, 1624 0, sizeof(struct lpfc_name)); 1625 } 1626 1627 rc |= BG_ERR_TGT | BG_ERR_SWAP; 1628 /* Signals the caller to swap CRC->CSUM */ 1629 1630 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1631 "0817 BLKGRD: Injecting guard error: " 1632 "write lba x%lx\n", (unsigned long)lba); 1633 break; 1634 case SCSI_PROT_WRITE_STRIP: 1635 /* 1636 * For WRITE_STRIP and WRITE_PASS, 1637 * force the error on data 1638 * being copied from SLI-Host to SLI-Port. 1639 */ 1640 phba->lpfc_injerr_wgrd_cnt--; 1641 if (phba->lpfc_injerr_wgrd_cnt == 0) { 1642 phba->lpfc_injerr_nportid = 0; 1643 phba->lpfc_injerr_lba = 1644 LPFC_INJERR_LBA_OFF; 1645 memset(&phba->lpfc_injerr_wwpn, 1646 0, sizeof(struct lpfc_name)); 1647 } 1648 1649 rc = BG_ERR_INIT | BG_ERR_SWAP; 1650 /* Signals the caller to swap CRC->CSUM */ 1651 1652 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1653 "0816 BLKGRD: Injecting guard error: " 1654 "write lba x%lx\n", (unsigned long)lba); 1655 break; 1656 } 1657 } 1658 if (phba->lpfc_injerr_rgrd_cnt) { 1659 switch (op) { 1660 case SCSI_PROT_READ_INSERT: 1661 case SCSI_PROT_READ_STRIP: 1662 case SCSI_PROT_READ_PASS: 1663 /* 1664 * For READ_STRIP and READ_PASS, force the 1665 * error on data being read off the wire. It 1666 * should force an IO error to the driver. 1667 */ 1668 phba->lpfc_injerr_rgrd_cnt--; 1669 if (phba->lpfc_injerr_rgrd_cnt == 0) { 1670 phba->lpfc_injerr_nportid = 0; 1671 phba->lpfc_injerr_lba = 1672 LPFC_INJERR_LBA_OFF; 1673 memset(&phba->lpfc_injerr_wwpn, 1674 0, sizeof(struct lpfc_name)); 1675 } 1676 1677 rc = BG_ERR_INIT | BG_ERR_SWAP; 1678 /* Signals the caller to swap CRC->CSUM */ 1679 1680 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1681 "0818 BLKGRD: Injecting guard error: " 1682 "read lba x%lx\n", (unsigned long)lba); 1683 } 1684 } 1685 } 1686 1687 return rc; 1688 } 1689 #endif 1690 1691 /** 1692 * lpfc_sc_to_bg_opcodes - Determine the BlockGuard opcodes to be used with 1693 * the specified SCSI command. 1694 * @phba: The Hba for which this call is being executed. 1695 * @sc: The SCSI command to examine 1696 * @txopt: (out) BlockGuard operation for transmitted data 1697 * @rxopt: (out) BlockGuard operation for received data 1698 * 1699 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined 1700 * 1701 **/ 1702 static int 1703 lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1704 uint8_t *txop, uint8_t *rxop) 1705 { 1706 uint8_t ret = 0; 1707 1708 if (lpfc_cmd_guard_csum(sc)) { 1709 switch (scsi_get_prot_op(sc)) { 1710 case SCSI_PROT_READ_INSERT: 1711 case SCSI_PROT_WRITE_STRIP: 1712 *rxop = BG_OP_IN_NODIF_OUT_CSUM; 1713 *txop = BG_OP_IN_CSUM_OUT_NODIF; 1714 break; 1715 1716 case SCSI_PROT_READ_STRIP: 1717 case SCSI_PROT_WRITE_INSERT: 1718 *rxop = BG_OP_IN_CRC_OUT_NODIF; 1719 *txop = BG_OP_IN_NODIF_OUT_CRC; 1720 break; 1721 1722 case SCSI_PROT_READ_PASS: 1723 case SCSI_PROT_WRITE_PASS: 1724 *rxop = BG_OP_IN_CRC_OUT_CSUM; 1725 *txop = BG_OP_IN_CSUM_OUT_CRC; 1726 break; 1727 1728 case SCSI_PROT_NORMAL: 1729 default: 1730 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1731 "9063 BLKGRD: Bad op/guard:%d/IP combination\n", 1732 scsi_get_prot_op(sc)); 1733 ret = 1; 1734 break; 1735 1736 } 1737 } else { 1738 switch (scsi_get_prot_op(sc)) { 1739 case SCSI_PROT_READ_STRIP: 1740 case SCSI_PROT_WRITE_INSERT: 1741 *rxop = BG_OP_IN_CRC_OUT_NODIF; 1742 *txop = BG_OP_IN_NODIF_OUT_CRC; 1743 break; 1744 1745 case SCSI_PROT_READ_PASS: 1746 case SCSI_PROT_WRITE_PASS: 1747 *rxop = BG_OP_IN_CRC_OUT_CRC; 1748 *txop = BG_OP_IN_CRC_OUT_CRC; 1749 break; 1750 1751 case SCSI_PROT_READ_INSERT: 1752 case SCSI_PROT_WRITE_STRIP: 1753 *rxop = BG_OP_IN_NODIF_OUT_CRC; 1754 *txop = BG_OP_IN_CRC_OUT_NODIF; 1755 break; 1756 1757 case SCSI_PROT_NORMAL: 1758 default: 1759 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 1760 "9075 BLKGRD: Bad op/guard:%d/CRC combination\n", 1761 scsi_get_prot_op(sc)); 1762 ret = 1; 1763 break; 1764 } 1765 } 1766 1767 return ret; 1768 } 1769 1770 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 1771 /** 1772 * lpfc_bg_err_opcodes - reDetermine the BlockGuard opcodes to be used with 1773 * the specified SCSI command in order to force a guard tag error. 1774 * @phba: The Hba for which this call is being executed. 1775 * @sc: The SCSI command to examine 1776 * @txopt: (out) BlockGuard operation for transmitted data 1777 * @rxopt: (out) BlockGuard operation for received data 1778 * 1779 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined 1780 * 1781 **/ 1782 static int 1783 lpfc_bg_err_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1784 uint8_t *txop, uint8_t *rxop) 1785 { 1786 uint8_t ret = 0; 1787 1788 if (lpfc_cmd_guard_csum(sc)) { 1789 switch (scsi_get_prot_op(sc)) { 1790 case SCSI_PROT_READ_INSERT: 1791 case SCSI_PROT_WRITE_STRIP: 1792 *rxop = BG_OP_IN_NODIF_OUT_CRC; 1793 *txop = BG_OP_IN_CRC_OUT_NODIF; 1794 break; 1795 1796 case SCSI_PROT_READ_STRIP: 1797 case SCSI_PROT_WRITE_INSERT: 1798 *rxop = BG_OP_IN_CSUM_OUT_NODIF; 1799 *txop = BG_OP_IN_NODIF_OUT_CSUM; 1800 break; 1801 1802 case SCSI_PROT_READ_PASS: 1803 case SCSI_PROT_WRITE_PASS: 1804 *rxop = BG_OP_IN_CSUM_OUT_CRC; 1805 *txop = BG_OP_IN_CRC_OUT_CSUM; 1806 break; 1807 1808 case SCSI_PROT_NORMAL: 1809 default: 1810 break; 1811 1812 } 1813 } else { 1814 switch (scsi_get_prot_op(sc)) { 1815 case SCSI_PROT_READ_STRIP: 1816 case SCSI_PROT_WRITE_INSERT: 1817 *rxop = BG_OP_IN_CSUM_OUT_NODIF; 1818 *txop = BG_OP_IN_NODIF_OUT_CSUM; 1819 break; 1820 1821 case SCSI_PROT_READ_PASS: 1822 case SCSI_PROT_WRITE_PASS: 1823 *rxop = BG_OP_IN_CSUM_OUT_CSUM; 1824 *txop = BG_OP_IN_CSUM_OUT_CSUM; 1825 break; 1826 1827 case SCSI_PROT_READ_INSERT: 1828 case SCSI_PROT_WRITE_STRIP: 1829 *rxop = BG_OP_IN_NODIF_OUT_CSUM; 1830 *txop = BG_OP_IN_CSUM_OUT_NODIF; 1831 break; 1832 1833 case SCSI_PROT_NORMAL: 1834 default: 1835 break; 1836 } 1837 } 1838 1839 return ret; 1840 } 1841 #endif 1842 1843 /** 1844 * lpfc_bg_setup_bpl - Setup BlockGuard BPL with no protection data 1845 * @phba: The Hba for which this call is being executed. 1846 * @sc: pointer to scsi command we're working on 1847 * @bpl: pointer to buffer list for protection groups 1848 * @datacnt: number of segments of data that have been dma mapped 1849 * 1850 * This function sets up BPL buffer list for protection groups of 1851 * type LPFC_PG_TYPE_NO_DIF 1852 * 1853 * This is usually used when the HBA is instructed to generate 1854 * DIFs and insert them into data stream (or strip DIF from 1855 * incoming data stream) 1856 * 1857 * The buffer list consists of just one protection group described 1858 * below: 1859 * +-------------------------+ 1860 * start of prot group --> | PDE_5 | 1861 * +-------------------------+ 1862 * | PDE_6 | 1863 * +-------------------------+ 1864 * | Data BDE | 1865 * +-------------------------+ 1866 * |more Data BDE's ... (opt)| 1867 * +-------------------------+ 1868 * 1869 * 1870 * Note: Data s/g buffers have been dma mapped 1871 * 1872 * Returns the number of BDEs added to the BPL. 1873 **/ 1874 static int 1875 lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc, 1876 struct ulp_bde64 *bpl, int datasegcnt) 1877 { 1878 struct scatterlist *sgde = NULL; /* s/g data entry */ 1879 struct lpfc_pde5 *pde5 = NULL; 1880 struct lpfc_pde6 *pde6 = NULL; 1881 dma_addr_t physaddr; 1882 int i = 0, num_bde = 0, status; 1883 int datadir = sc->sc_data_direction; 1884 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 1885 uint32_t rc; 1886 #endif 1887 uint32_t checking = 1; 1888 uint32_t reftag; 1889 uint8_t txop, rxop; 1890 1891 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); 1892 if (status) 1893 goto out; 1894 1895 /* extract some info from the scsi command for pde*/ 1896 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */ 1897 1898 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 1899 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); 1900 if (rc) { 1901 if (rc & BG_ERR_SWAP) 1902 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); 1903 if (rc & BG_ERR_CHECK) 1904 checking = 0; 1905 } 1906 #endif 1907 1908 /* setup PDE5 with what we have */ 1909 pde5 = (struct lpfc_pde5 *) bpl; 1910 memset(pde5, 0, sizeof(struct lpfc_pde5)); 1911 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR); 1912 1913 /* Endianness conversion if necessary for PDE5 */ 1914 pde5->word0 = cpu_to_le32(pde5->word0); 1915 pde5->reftag = cpu_to_le32(reftag); 1916 1917 /* advance bpl and increment bde count */ 1918 num_bde++; 1919 bpl++; 1920 pde6 = (struct lpfc_pde6 *) bpl; 1921 1922 /* setup PDE6 with the rest of the info */ 1923 memset(pde6, 0, sizeof(struct lpfc_pde6)); 1924 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR); 1925 bf_set(pde6_optx, pde6, txop); 1926 bf_set(pde6_oprx, pde6, rxop); 1927 1928 /* 1929 * We only need to check the data on READs, for WRITEs 1930 * protection data is automatically generated, not checked. 1931 */ 1932 if (datadir == DMA_FROM_DEVICE) { 1933 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) 1934 bf_set(pde6_ce, pde6, checking); 1935 else 1936 bf_set(pde6_ce, pde6, 0); 1937 1938 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF)) 1939 bf_set(pde6_re, pde6, checking); 1940 else 1941 bf_set(pde6_re, pde6, 0); 1942 } 1943 bf_set(pde6_ai, pde6, 1); 1944 bf_set(pde6_ae, pde6, 0); 1945 bf_set(pde6_apptagval, pde6, 0); 1946 1947 /* Endianness conversion if necessary for PDE6 */ 1948 pde6->word0 = cpu_to_le32(pde6->word0); 1949 pde6->word1 = cpu_to_le32(pde6->word1); 1950 pde6->word2 = cpu_to_le32(pde6->word2); 1951 1952 /* advance bpl and increment bde count */ 1953 num_bde++; 1954 bpl++; 1955 1956 /* assumption: caller has already run dma_map_sg on command data */ 1957 scsi_for_each_sg(sc, sgde, datasegcnt, i) { 1958 physaddr = sg_dma_address(sgde); 1959 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr)); 1960 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr)); 1961 bpl->tus.f.bdeSize = sg_dma_len(sgde); 1962 if (datadir == DMA_TO_DEVICE) 1963 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 1964 else 1965 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I; 1966 bpl->tus.w = le32_to_cpu(bpl->tus.w); 1967 bpl++; 1968 num_bde++; 1969 } 1970 1971 out: 1972 return num_bde; 1973 } 1974 1975 /** 1976 * lpfc_bg_setup_bpl_prot - Setup BlockGuard BPL with protection data 1977 * @phba: The Hba for which this call is being executed. 1978 * @sc: pointer to scsi command we're working on 1979 * @bpl: pointer to buffer list for protection groups 1980 * @datacnt: number of segments of data that have been dma mapped 1981 * @protcnt: number of segment of protection data that have been dma mapped 1982 * 1983 * This function sets up BPL buffer list for protection groups of 1984 * type LPFC_PG_TYPE_DIF 1985 * 1986 * This is usually used when DIFs are in their own buffers, 1987 * separate from the data. The HBA can then by instructed 1988 * to place the DIFs in the outgoing stream. For read operations, 1989 * The HBA could extract the DIFs and place it in DIF buffers. 1990 * 1991 * The buffer list for this type consists of one or more of the 1992 * protection groups described below: 1993 * +-------------------------+ 1994 * start of first prot group --> | PDE_5 | 1995 * +-------------------------+ 1996 * | PDE_6 | 1997 * +-------------------------+ 1998 * | PDE_7 (Prot BDE) | 1999 * +-------------------------+ 2000 * | Data BDE | 2001 * +-------------------------+ 2002 * |more Data BDE's ... (opt)| 2003 * +-------------------------+ 2004 * start of new prot group --> | PDE_5 | 2005 * +-------------------------+ 2006 * | ... | 2007 * +-------------------------+ 2008 * 2009 * Note: It is assumed that both data and protection s/g buffers have been 2010 * mapped for DMA 2011 * 2012 * Returns the number of BDEs added to the BPL. 2013 **/ 2014 static int 2015 lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc, 2016 struct ulp_bde64 *bpl, int datacnt, int protcnt) 2017 { 2018 struct scatterlist *sgde = NULL; /* s/g data entry */ 2019 struct scatterlist *sgpe = NULL; /* s/g prot entry */ 2020 struct lpfc_pde5 *pde5 = NULL; 2021 struct lpfc_pde6 *pde6 = NULL; 2022 struct lpfc_pde7 *pde7 = NULL; 2023 dma_addr_t dataphysaddr, protphysaddr; 2024 unsigned short curr_data = 0, curr_prot = 0; 2025 unsigned int split_offset; 2026 unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder; 2027 unsigned int protgrp_blks, protgrp_bytes; 2028 unsigned int remainder, subtotal; 2029 int status; 2030 int datadir = sc->sc_data_direction; 2031 unsigned char pgdone = 0, alldone = 0; 2032 unsigned blksize; 2033 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2034 uint32_t rc; 2035 #endif 2036 uint32_t checking = 1; 2037 uint32_t reftag; 2038 uint8_t txop, rxop; 2039 int num_bde = 0; 2040 2041 sgpe = scsi_prot_sglist(sc); 2042 sgde = scsi_sglist(sc); 2043 2044 if (!sgpe || !sgde) { 2045 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2046 "9020 Invalid s/g entry: data=0x%p prot=0x%p\n", 2047 sgpe, sgde); 2048 return 0; 2049 } 2050 2051 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); 2052 if (status) 2053 goto out; 2054 2055 /* extract some info from the scsi command */ 2056 blksize = lpfc_cmd_blksize(sc); 2057 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */ 2058 2059 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2060 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); 2061 if (rc) { 2062 if (rc & BG_ERR_SWAP) 2063 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); 2064 if (rc & BG_ERR_CHECK) 2065 checking = 0; 2066 } 2067 #endif 2068 2069 split_offset = 0; 2070 do { 2071 /* Check to see if we ran out of space */ 2072 if (num_bde >= (phba->cfg_total_seg_cnt - 2)) 2073 return num_bde + 3; 2074 2075 /* setup PDE5 with what we have */ 2076 pde5 = (struct lpfc_pde5 *) bpl; 2077 memset(pde5, 0, sizeof(struct lpfc_pde5)); 2078 bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR); 2079 2080 /* Endianness conversion if necessary for PDE5 */ 2081 pde5->word0 = cpu_to_le32(pde5->word0); 2082 pde5->reftag = cpu_to_le32(reftag); 2083 2084 /* advance bpl and increment bde count */ 2085 num_bde++; 2086 bpl++; 2087 pde6 = (struct lpfc_pde6 *) bpl; 2088 2089 /* setup PDE6 with the rest of the info */ 2090 memset(pde6, 0, sizeof(struct lpfc_pde6)); 2091 bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR); 2092 bf_set(pde6_optx, pde6, txop); 2093 bf_set(pde6_oprx, pde6, rxop); 2094 2095 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) 2096 bf_set(pde6_ce, pde6, checking); 2097 else 2098 bf_set(pde6_ce, pde6, 0); 2099 2100 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF)) 2101 bf_set(pde6_re, pde6, checking); 2102 else 2103 bf_set(pde6_re, pde6, 0); 2104 2105 bf_set(pde6_ai, pde6, 1); 2106 bf_set(pde6_ae, pde6, 0); 2107 bf_set(pde6_apptagval, pde6, 0); 2108 2109 /* Endianness conversion if necessary for PDE6 */ 2110 pde6->word0 = cpu_to_le32(pde6->word0); 2111 pde6->word1 = cpu_to_le32(pde6->word1); 2112 pde6->word2 = cpu_to_le32(pde6->word2); 2113 2114 /* advance bpl and increment bde count */ 2115 num_bde++; 2116 bpl++; 2117 2118 /* setup the first BDE that points to protection buffer */ 2119 protphysaddr = sg_dma_address(sgpe) + protgroup_offset; 2120 protgroup_len = sg_dma_len(sgpe) - protgroup_offset; 2121 2122 /* must be integer multiple of the DIF block length */ 2123 BUG_ON(protgroup_len % 8); 2124 2125 pde7 = (struct lpfc_pde7 *) bpl; 2126 memset(pde7, 0, sizeof(struct lpfc_pde7)); 2127 bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR); 2128 2129 pde7->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr)); 2130 pde7->addrLow = le32_to_cpu(putPaddrLow(protphysaddr)); 2131 2132 protgrp_blks = protgroup_len / 8; 2133 protgrp_bytes = protgrp_blks * blksize; 2134 2135 /* check if this pde is crossing the 4K boundary; if so split */ 2136 if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) { 2137 protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff); 2138 protgroup_offset += protgroup_remainder; 2139 protgrp_blks = protgroup_remainder / 8; 2140 protgrp_bytes = protgrp_blks * blksize; 2141 } else { 2142 protgroup_offset = 0; 2143 curr_prot++; 2144 } 2145 2146 num_bde++; 2147 2148 /* setup BDE's for data blocks associated with DIF data */ 2149 pgdone = 0; 2150 subtotal = 0; /* total bytes processed for current prot grp */ 2151 while (!pgdone) { 2152 /* Check to see if we ran out of space */ 2153 if (num_bde >= phba->cfg_total_seg_cnt) 2154 return num_bde + 1; 2155 2156 if (!sgde) { 2157 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2158 "9065 BLKGRD:%s Invalid data segment\n", 2159 __func__); 2160 return 0; 2161 } 2162 bpl++; 2163 dataphysaddr = sg_dma_address(sgde) + split_offset; 2164 bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr)); 2165 bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr)); 2166 2167 remainder = sg_dma_len(sgde) - split_offset; 2168 2169 if ((subtotal + remainder) <= protgrp_bytes) { 2170 /* we can use this whole buffer */ 2171 bpl->tus.f.bdeSize = remainder; 2172 split_offset = 0; 2173 2174 if ((subtotal + remainder) == protgrp_bytes) 2175 pgdone = 1; 2176 } else { 2177 /* must split this buffer with next prot grp */ 2178 bpl->tus.f.bdeSize = protgrp_bytes - subtotal; 2179 split_offset += bpl->tus.f.bdeSize; 2180 } 2181 2182 subtotal += bpl->tus.f.bdeSize; 2183 2184 if (datadir == DMA_TO_DEVICE) 2185 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 2186 else 2187 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I; 2188 bpl->tus.w = le32_to_cpu(bpl->tus.w); 2189 2190 num_bde++; 2191 curr_data++; 2192 2193 if (split_offset) 2194 break; 2195 2196 /* Move to the next s/g segment if possible */ 2197 sgde = sg_next(sgde); 2198 2199 } 2200 2201 if (protgroup_offset) { 2202 /* update the reference tag */ 2203 reftag += protgrp_blks; 2204 bpl++; 2205 continue; 2206 } 2207 2208 /* are we done ? */ 2209 if (curr_prot == protcnt) { 2210 alldone = 1; 2211 } else if (curr_prot < protcnt) { 2212 /* advance to next prot buffer */ 2213 sgpe = sg_next(sgpe); 2214 bpl++; 2215 2216 /* update the reference tag */ 2217 reftag += protgrp_blks; 2218 } else { 2219 /* if we're here, we have a bug */ 2220 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2221 "9054 BLKGRD: bug in %s\n", __func__); 2222 } 2223 2224 } while (!alldone); 2225 out: 2226 2227 return num_bde; 2228 } 2229 2230 /** 2231 * lpfc_bg_setup_sgl - Setup BlockGuard SGL with no protection data 2232 * @phba: The Hba for which this call is being executed. 2233 * @sc: pointer to scsi command we're working on 2234 * @sgl: pointer to buffer list for protection groups 2235 * @datacnt: number of segments of data that have been dma mapped 2236 * 2237 * This function sets up SGL buffer list for protection groups of 2238 * type LPFC_PG_TYPE_NO_DIF 2239 * 2240 * This is usually used when the HBA is instructed to generate 2241 * DIFs and insert them into data stream (or strip DIF from 2242 * incoming data stream) 2243 * 2244 * The buffer list consists of just one protection group described 2245 * below: 2246 * +-------------------------+ 2247 * start of prot group --> | DI_SEED | 2248 * +-------------------------+ 2249 * | Data SGE | 2250 * +-------------------------+ 2251 * |more Data SGE's ... (opt)| 2252 * +-------------------------+ 2253 * 2254 * 2255 * Note: Data s/g buffers have been dma mapped 2256 * 2257 * Returns the number of SGEs added to the SGL. 2258 **/ 2259 static int 2260 lpfc_bg_setup_sgl(struct lpfc_hba *phba, struct scsi_cmnd *sc, 2261 struct sli4_sge *sgl, int datasegcnt) 2262 { 2263 struct scatterlist *sgde = NULL; /* s/g data entry */ 2264 struct sli4_sge_diseed *diseed = NULL; 2265 dma_addr_t physaddr; 2266 int i = 0, num_sge = 0, status; 2267 uint32_t reftag; 2268 uint8_t txop, rxop; 2269 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2270 uint32_t rc; 2271 #endif 2272 uint32_t checking = 1; 2273 uint32_t dma_len; 2274 uint32_t dma_offset = 0; 2275 2276 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); 2277 if (status) 2278 goto out; 2279 2280 /* extract some info from the scsi command for pde*/ 2281 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */ 2282 2283 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2284 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); 2285 if (rc) { 2286 if (rc & BG_ERR_SWAP) 2287 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); 2288 if (rc & BG_ERR_CHECK) 2289 checking = 0; 2290 } 2291 #endif 2292 2293 /* setup DISEED with what we have */ 2294 diseed = (struct sli4_sge_diseed *) sgl; 2295 memset(diseed, 0, sizeof(struct sli4_sge_diseed)); 2296 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED); 2297 2298 /* Endianness conversion if necessary */ 2299 diseed->ref_tag = cpu_to_le32(reftag); 2300 diseed->ref_tag_tran = diseed->ref_tag; 2301 2302 /* 2303 * We only need to check the data on READs, for WRITEs 2304 * protection data is automatically generated, not checked. 2305 */ 2306 if (sc->sc_data_direction == DMA_FROM_DEVICE) { 2307 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) 2308 bf_set(lpfc_sli4_sge_dif_ce, diseed, checking); 2309 else 2310 bf_set(lpfc_sli4_sge_dif_ce, diseed, 0); 2311 2312 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF)) 2313 bf_set(lpfc_sli4_sge_dif_re, diseed, checking); 2314 else 2315 bf_set(lpfc_sli4_sge_dif_re, diseed, 0); 2316 } 2317 2318 /* setup DISEED with the rest of the info */ 2319 bf_set(lpfc_sli4_sge_dif_optx, diseed, txop); 2320 bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop); 2321 2322 bf_set(lpfc_sli4_sge_dif_ai, diseed, 1); 2323 bf_set(lpfc_sli4_sge_dif_me, diseed, 0); 2324 2325 /* Endianness conversion if necessary for DISEED */ 2326 diseed->word2 = cpu_to_le32(diseed->word2); 2327 diseed->word3 = cpu_to_le32(diseed->word3); 2328 2329 /* advance bpl and increment sge count */ 2330 num_sge++; 2331 sgl++; 2332 2333 /* assumption: caller has already run dma_map_sg on command data */ 2334 scsi_for_each_sg(sc, sgde, datasegcnt, i) { 2335 physaddr = sg_dma_address(sgde); 2336 dma_len = sg_dma_len(sgde); 2337 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr)); 2338 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr)); 2339 if ((i + 1) == datasegcnt) 2340 bf_set(lpfc_sli4_sge_last, sgl, 1); 2341 else 2342 bf_set(lpfc_sli4_sge_last, sgl, 0); 2343 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset); 2344 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA); 2345 2346 sgl->sge_len = cpu_to_le32(dma_len); 2347 dma_offset += dma_len; 2348 2349 sgl++; 2350 num_sge++; 2351 } 2352 2353 out: 2354 return num_sge; 2355 } 2356 2357 /** 2358 * lpfc_bg_setup_sgl_prot - Setup BlockGuard SGL with protection data 2359 * @phba: The Hba for which this call is being executed. 2360 * @sc: pointer to scsi command we're working on 2361 * @sgl: pointer to buffer list for protection groups 2362 * @datacnt: number of segments of data that have been dma mapped 2363 * @protcnt: number of segment of protection data that have been dma mapped 2364 * 2365 * This function sets up SGL buffer list for protection groups of 2366 * type LPFC_PG_TYPE_DIF 2367 * 2368 * This is usually used when DIFs are in their own buffers, 2369 * separate from the data. The HBA can then by instructed 2370 * to place the DIFs in the outgoing stream. For read operations, 2371 * The HBA could extract the DIFs and place it in DIF buffers. 2372 * 2373 * The buffer list for this type consists of one or more of the 2374 * protection groups described below: 2375 * +-------------------------+ 2376 * start of first prot group --> | DISEED | 2377 * +-------------------------+ 2378 * | DIF (Prot SGE) | 2379 * +-------------------------+ 2380 * | Data SGE | 2381 * +-------------------------+ 2382 * |more Data SGE's ... (opt)| 2383 * +-------------------------+ 2384 * start of new prot group --> | DISEED | 2385 * +-------------------------+ 2386 * | ... | 2387 * +-------------------------+ 2388 * 2389 * Note: It is assumed that both data and protection s/g buffers have been 2390 * mapped for DMA 2391 * 2392 * Returns the number of SGEs added to the SGL. 2393 **/ 2394 static int 2395 lpfc_bg_setup_sgl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc, 2396 struct sli4_sge *sgl, int datacnt, int protcnt) 2397 { 2398 struct scatterlist *sgde = NULL; /* s/g data entry */ 2399 struct scatterlist *sgpe = NULL; /* s/g prot entry */ 2400 struct sli4_sge_diseed *diseed = NULL; 2401 dma_addr_t dataphysaddr, protphysaddr; 2402 unsigned short curr_data = 0, curr_prot = 0; 2403 unsigned int split_offset; 2404 unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder; 2405 unsigned int protgrp_blks, protgrp_bytes; 2406 unsigned int remainder, subtotal; 2407 int status; 2408 unsigned char pgdone = 0, alldone = 0; 2409 unsigned blksize; 2410 uint32_t reftag; 2411 uint8_t txop, rxop; 2412 uint32_t dma_len; 2413 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2414 uint32_t rc; 2415 #endif 2416 uint32_t checking = 1; 2417 uint32_t dma_offset = 0; 2418 int num_sge = 0; 2419 2420 sgpe = scsi_prot_sglist(sc); 2421 sgde = scsi_sglist(sc); 2422 2423 if (!sgpe || !sgde) { 2424 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2425 "9082 Invalid s/g entry: data=0x%p prot=0x%p\n", 2426 sgpe, sgde); 2427 return 0; 2428 } 2429 2430 status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); 2431 if (status) 2432 goto out; 2433 2434 /* extract some info from the scsi command */ 2435 blksize = lpfc_cmd_blksize(sc); 2436 reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */ 2437 2438 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 2439 rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); 2440 if (rc) { 2441 if (rc & BG_ERR_SWAP) 2442 lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); 2443 if (rc & BG_ERR_CHECK) 2444 checking = 0; 2445 } 2446 #endif 2447 2448 split_offset = 0; 2449 do { 2450 /* Check to see if we ran out of space */ 2451 if (num_sge >= (phba->cfg_total_seg_cnt - 2)) 2452 return num_sge + 3; 2453 2454 /* setup DISEED with what we have */ 2455 diseed = (struct sli4_sge_diseed *) sgl; 2456 memset(diseed, 0, sizeof(struct sli4_sge_diseed)); 2457 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED); 2458 2459 /* Endianness conversion if necessary */ 2460 diseed->ref_tag = cpu_to_le32(reftag); 2461 diseed->ref_tag_tran = diseed->ref_tag; 2462 2463 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) { 2464 bf_set(lpfc_sli4_sge_dif_ce, diseed, checking); 2465 2466 } else { 2467 bf_set(lpfc_sli4_sge_dif_ce, diseed, 0); 2468 /* 2469 * When in this mode, the hardware will replace 2470 * the guard tag from the host with a 2471 * newly generated good CRC for the wire. 2472 * Switch to raw mode here to avoid this 2473 * behavior. What the host sends gets put on the wire. 2474 */ 2475 if (txop == BG_OP_IN_CRC_OUT_CRC) { 2476 txop = BG_OP_RAW_MODE; 2477 rxop = BG_OP_RAW_MODE; 2478 } 2479 } 2480 2481 2482 if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF)) 2483 bf_set(lpfc_sli4_sge_dif_re, diseed, checking); 2484 else 2485 bf_set(lpfc_sli4_sge_dif_re, diseed, 0); 2486 2487 /* setup DISEED with the rest of the info */ 2488 bf_set(lpfc_sli4_sge_dif_optx, diseed, txop); 2489 bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop); 2490 2491 bf_set(lpfc_sli4_sge_dif_ai, diseed, 1); 2492 bf_set(lpfc_sli4_sge_dif_me, diseed, 0); 2493 2494 /* Endianness conversion if necessary for DISEED */ 2495 diseed->word2 = cpu_to_le32(diseed->word2); 2496 diseed->word3 = cpu_to_le32(diseed->word3); 2497 2498 /* advance sgl and increment bde count */ 2499 num_sge++; 2500 sgl++; 2501 2502 /* setup the first BDE that points to protection buffer */ 2503 protphysaddr = sg_dma_address(sgpe) + protgroup_offset; 2504 protgroup_len = sg_dma_len(sgpe) - protgroup_offset; 2505 2506 /* must be integer multiple of the DIF block length */ 2507 BUG_ON(protgroup_len % 8); 2508 2509 /* Now setup DIF SGE */ 2510 sgl->word2 = 0; 2511 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DIF); 2512 sgl->addr_hi = le32_to_cpu(putPaddrHigh(protphysaddr)); 2513 sgl->addr_lo = le32_to_cpu(putPaddrLow(protphysaddr)); 2514 sgl->word2 = cpu_to_le32(sgl->word2); 2515 2516 protgrp_blks = protgroup_len / 8; 2517 protgrp_bytes = protgrp_blks * blksize; 2518 2519 /* check if DIF SGE is crossing the 4K boundary; if so split */ 2520 if ((sgl->addr_lo & 0xfff) + protgroup_len > 0x1000) { 2521 protgroup_remainder = 0x1000 - (sgl->addr_lo & 0xfff); 2522 protgroup_offset += protgroup_remainder; 2523 protgrp_blks = protgroup_remainder / 8; 2524 protgrp_bytes = protgrp_blks * blksize; 2525 } else { 2526 protgroup_offset = 0; 2527 curr_prot++; 2528 } 2529 2530 num_sge++; 2531 2532 /* setup SGE's for data blocks associated with DIF data */ 2533 pgdone = 0; 2534 subtotal = 0; /* total bytes processed for current prot grp */ 2535 while (!pgdone) { 2536 /* Check to see if we ran out of space */ 2537 if (num_sge >= phba->cfg_total_seg_cnt) 2538 return num_sge + 1; 2539 2540 if (!sgde) { 2541 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2542 "9086 BLKGRD:%s Invalid data segment\n", 2543 __func__); 2544 return 0; 2545 } 2546 sgl++; 2547 dataphysaddr = sg_dma_address(sgde) + split_offset; 2548 2549 remainder = sg_dma_len(sgde) - split_offset; 2550 2551 if ((subtotal + remainder) <= protgrp_bytes) { 2552 /* we can use this whole buffer */ 2553 dma_len = remainder; 2554 split_offset = 0; 2555 2556 if ((subtotal + remainder) == protgrp_bytes) 2557 pgdone = 1; 2558 } else { 2559 /* must split this buffer with next prot grp */ 2560 dma_len = protgrp_bytes - subtotal; 2561 split_offset += dma_len; 2562 } 2563 2564 subtotal += dma_len; 2565 2566 sgl->addr_lo = cpu_to_le32(putPaddrLow(dataphysaddr)); 2567 sgl->addr_hi = cpu_to_le32(putPaddrHigh(dataphysaddr)); 2568 bf_set(lpfc_sli4_sge_last, sgl, 0); 2569 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset); 2570 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA); 2571 2572 sgl->sge_len = cpu_to_le32(dma_len); 2573 dma_offset += dma_len; 2574 2575 num_sge++; 2576 curr_data++; 2577 2578 if (split_offset) 2579 break; 2580 2581 /* Move to the next s/g segment if possible */ 2582 sgde = sg_next(sgde); 2583 } 2584 2585 if (protgroup_offset) { 2586 /* update the reference tag */ 2587 reftag += protgrp_blks; 2588 sgl++; 2589 continue; 2590 } 2591 2592 /* are we done ? */ 2593 if (curr_prot == protcnt) { 2594 bf_set(lpfc_sli4_sge_last, sgl, 1); 2595 alldone = 1; 2596 } else if (curr_prot < protcnt) { 2597 /* advance to next prot buffer */ 2598 sgpe = sg_next(sgpe); 2599 sgl++; 2600 2601 /* update the reference tag */ 2602 reftag += protgrp_blks; 2603 } else { 2604 /* if we're here, we have a bug */ 2605 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 2606 "9085 BLKGRD: bug in %s\n", __func__); 2607 } 2608 2609 } while (!alldone); 2610 2611 out: 2612 2613 return num_sge; 2614 } 2615 2616 /** 2617 * lpfc_prot_group_type - Get prtotection group type of SCSI command 2618 * @phba: The Hba for which this call is being executed. 2619 * @sc: pointer to scsi command we're working on 2620 * 2621 * Given a SCSI command that supports DIF, determine composition of protection 2622 * groups involved in setting up buffer lists 2623 * 2624 * Returns: Protection group type (with or without DIF) 2625 * 2626 **/ 2627 static int 2628 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc) 2629 { 2630 int ret = LPFC_PG_TYPE_INVALID; 2631 unsigned char op = scsi_get_prot_op(sc); 2632 2633 switch (op) { 2634 case SCSI_PROT_READ_STRIP: 2635 case SCSI_PROT_WRITE_INSERT: 2636 ret = LPFC_PG_TYPE_NO_DIF; 2637 break; 2638 case SCSI_PROT_READ_INSERT: 2639 case SCSI_PROT_WRITE_STRIP: 2640 case SCSI_PROT_READ_PASS: 2641 case SCSI_PROT_WRITE_PASS: 2642 ret = LPFC_PG_TYPE_DIF_BUF; 2643 break; 2644 default: 2645 if (phba) 2646 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2647 "9021 Unsupported protection op:%d\n", 2648 op); 2649 break; 2650 } 2651 return ret; 2652 } 2653 2654 /** 2655 * lpfc_bg_scsi_adjust_dl - Adjust SCSI data length for BlockGuard 2656 * @phba: The Hba for which this call is being executed. 2657 * @lpfc_cmd: The scsi buffer which is going to be adjusted. 2658 * 2659 * Adjust the data length to account for how much data 2660 * is actually on the wire. 2661 * 2662 * returns the adjusted data length 2663 **/ 2664 static int 2665 lpfc_bg_scsi_adjust_dl(struct lpfc_hba *phba, 2666 struct lpfc_scsi_buf *lpfc_cmd) 2667 { 2668 struct scsi_cmnd *sc = lpfc_cmd->pCmd; 2669 int fcpdl; 2670 2671 fcpdl = scsi_bufflen(sc); 2672 2673 /* Check if there is protection data on the wire */ 2674 if (sc->sc_data_direction == DMA_FROM_DEVICE) { 2675 /* Read check for protection data */ 2676 if (scsi_get_prot_op(sc) == SCSI_PROT_READ_INSERT) 2677 return fcpdl; 2678 2679 } else { 2680 /* Write check for protection data */ 2681 if (scsi_get_prot_op(sc) == SCSI_PROT_WRITE_STRIP) 2682 return fcpdl; 2683 } 2684 2685 /* 2686 * If we are in DIF Type 1 mode every data block has a 8 byte 2687 * DIF (trailer) attached to it. Must ajust FCP data length 2688 * to account for the protection data. 2689 */ 2690 fcpdl += (fcpdl / lpfc_cmd_blksize(sc)) * 8; 2691 2692 return fcpdl; 2693 } 2694 2695 /** 2696 * lpfc_bg_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec 2697 * @phba: The Hba for which this call is being executed. 2698 * @lpfc_cmd: The scsi buffer which is going to be prep'ed. 2699 * 2700 * This is the protection/DIF aware version of 2701 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the 2702 * two functions eventually, but for now, it's here 2703 **/ 2704 static int 2705 lpfc_bg_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, 2706 struct lpfc_scsi_buf *lpfc_cmd) 2707 { 2708 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 2709 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 2710 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl; 2711 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 2712 uint32_t num_bde = 0; 2713 int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction; 2714 int prot_group_type = 0; 2715 int fcpdl; 2716 2717 /* 2718 * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd 2719 * fcp_rsp regions to the first data bde entry 2720 */ 2721 bpl += 2; 2722 if (scsi_sg_count(scsi_cmnd)) { 2723 /* 2724 * The driver stores the segment count returned from pci_map_sg 2725 * because this a count of dma-mappings used to map the use_sg 2726 * pages. They are not guaranteed to be the same for those 2727 * architectures that implement an IOMMU. 2728 */ 2729 datasegcnt = dma_map_sg(&phba->pcidev->dev, 2730 scsi_sglist(scsi_cmnd), 2731 scsi_sg_count(scsi_cmnd), datadir); 2732 if (unlikely(!datasegcnt)) 2733 return 1; 2734 2735 lpfc_cmd->seg_cnt = datasegcnt; 2736 2737 /* First check if data segment count from SCSI Layer is good */ 2738 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) 2739 goto err; 2740 2741 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd); 2742 2743 switch (prot_group_type) { 2744 case LPFC_PG_TYPE_NO_DIF: 2745 2746 /* Here we need to add a PDE5 and PDE6 to the count */ 2747 if ((lpfc_cmd->seg_cnt + 2) > phba->cfg_total_seg_cnt) 2748 goto err; 2749 2750 num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl, 2751 datasegcnt); 2752 /* we should have 2 or more entries in buffer list */ 2753 if (num_bde < 2) 2754 goto err; 2755 break; 2756 2757 case LPFC_PG_TYPE_DIF_BUF: 2758 /* 2759 * This type indicates that protection buffers are 2760 * passed to the driver, so that needs to be prepared 2761 * for DMA 2762 */ 2763 protsegcnt = dma_map_sg(&phba->pcidev->dev, 2764 scsi_prot_sglist(scsi_cmnd), 2765 scsi_prot_sg_count(scsi_cmnd), datadir); 2766 if (unlikely(!protsegcnt)) { 2767 scsi_dma_unmap(scsi_cmnd); 2768 return 1; 2769 } 2770 2771 lpfc_cmd->prot_seg_cnt = protsegcnt; 2772 2773 /* 2774 * There is a minimun of 4 BPLs used for every 2775 * protection data segment. 2776 */ 2777 if ((lpfc_cmd->prot_seg_cnt * 4) > 2778 (phba->cfg_total_seg_cnt - 2)) 2779 goto err; 2780 2781 num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl, 2782 datasegcnt, protsegcnt); 2783 /* we should have 3 or more entries in buffer list */ 2784 if ((num_bde < 3) || 2785 (num_bde > phba->cfg_total_seg_cnt)) 2786 goto err; 2787 break; 2788 2789 case LPFC_PG_TYPE_INVALID: 2790 default: 2791 scsi_dma_unmap(scsi_cmnd); 2792 lpfc_cmd->seg_cnt = 0; 2793 2794 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2795 "9022 Unexpected protection group %i\n", 2796 prot_group_type); 2797 return 1; 2798 } 2799 } 2800 2801 /* 2802 * Finish initializing those IOCB fields that are dependent on the 2803 * scsi_cmnd request_buffer. Note that the bdeSize is explicitly 2804 * reinitialized since all iocb memory resources are used many times 2805 * for transmit, receive, and continuation bpl's. 2806 */ 2807 iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64)); 2808 iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64)); 2809 iocb_cmd->ulpBdeCount = 1; 2810 iocb_cmd->ulpLe = 1; 2811 2812 fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd); 2813 fcp_cmnd->fcpDl = be32_to_cpu(fcpdl); 2814 2815 /* 2816 * Due to difference in data length between DIF/non-DIF paths, 2817 * we need to set word 4 of IOCB here 2818 */ 2819 iocb_cmd->un.fcpi.fcpi_parm = fcpdl; 2820 2821 return 0; 2822 err: 2823 if (lpfc_cmd->seg_cnt) 2824 scsi_dma_unmap(scsi_cmnd); 2825 if (lpfc_cmd->prot_seg_cnt) 2826 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd), 2827 scsi_prot_sg_count(scsi_cmnd), 2828 scsi_cmnd->sc_data_direction); 2829 2830 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 2831 "9023 Cannot setup S/G List for HBA" 2832 "IO segs %d/%d BPL %d SCSI %d: %d %d\n", 2833 lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt, 2834 phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt, 2835 prot_group_type, num_bde); 2836 2837 lpfc_cmd->seg_cnt = 0; 2838 lpfc_cmd->prot_seg_cnt = 0; 2839 return 1; 2840 } 2841 2842 /* 2843 * This function calcuates the T10 DIF guard tag 2844 * on the specified data using a CRC algorithmn 2845 * using crc_t10dif. 2846 */ 2847 static uint16_t 2848 lpfc_bg_crc(uint8_t *data, int count) 2849 { 2850 uint16_t crc = 0; 2851 uint16_t x; 2852 2853 crc = crc_t10dif(data, count); 2854 x = cpu_to_be16(crc); 2855 return x; 2856 } 2857 2858 /* 2859 * This function calcuates the T10 DIF guard tag 2860 * on the specified data using a CSUM algorithmn 2861 * using ip_compute_csum. 2862 */ 2863 static uint16_t 2864 lpfc_bg_csum(uint8_t *data, int count) 2865 { 2866 uint16_t ret; 2867 2868 ret = ip_compute_csum(data, count); 2869 return ret; 2870 } 2871 2872 /* 2873 * This function examines the protection data to try to determine 2874 * what type of T10-DIF error occurred. 2875 */ 2876 static void 2877 lpfc_calc_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 2878 { 2879 struct scatterlist *sgpe; /* s/g prot entry */ 2880 struct scatterlist *sgde; /* s/g data entry */ 2881 struct scsi_cmnd *cmd = lpfc_cmd->pCmd; 2882 struct scsi_dif_tuple *src = NULL; 2883 uint8_t *data_src = NULL; 2884 uint16_t guard_tag; 2885 uint16_t start_app_tag, app_tag; 2886 uint32_t start_ref_tag, ref_tag; 2887 int prot, protsegcnt; 2888 int err_type, len, data_len; 2889 int chk_ref, chk_app, chk_guard; 2890 uint16_t sum; 2891 unsigned blksize; 2892 2893 err_type = BGS_GUARD_ERR_MASK; 2894 sum = 0; 2895 guard_tag = 0; 2896 2897 /* First check to see if there is protection data to examine */ 2898 prot = scsi_get_prot_op(cmd); 2899 if ((prot == SCSI_PROT_READ_STRIP) || 2900 (prot == SCSI_PROT_WRITE_INSERT) || 2901 (prot == SCSI_PROT_NORMAL)) 2902 goto out; 2903 2904 /* Currently the driver just supports ref_tag and guard_tag checking */ 2905 chk_ref = 1; 2906 chk_app = 0; 2907 chk_guard = 0; 2908 2909 /* Setup a ptr to the protection data provided by the SCSI host */ 2910 sgpe = scsi_prot_sglist(cmd); 2911 protsegcnt = lpfc_cmd->prot_seg_cnt; 2912 2913 if (sgpe && protsegcnt) { 2914 2915 /* 2916 * We will only try to verify guard tag if the segment 2917 * data length is a multiple of the blksize. 2918 */ 2919 sgde = scsi_sglist(cmd); 2920 blksize = lpfc_cmd_blksize(cmd); 2921 data_src = (uint8_t *)sg_virt(sgde); 2922 data_len = sgde->length; 2923 if ((data_len & (blksize - 1)) == 0) 2924 chk_guard = 1; 2925 2926 src = (struct scsi_dif_tuple *)sg_virt(sgpe); 2927 start_ref_tag = (uint32_t)scsi_get_lba(cmd); /* Truncate LBA */ 2928 start_app_tag = src->app_tag; 2929 len = sgpe->length; 2930 while (src && protsegcnt) { 2931 while (len) { 2932 2933 /* 2934 * First check to see if a protection data 2935 * check is valid 2936 */ 2937 if ((src->ref_tag == 0xffffffff) || 2938 (src->app_tag == 0xffff)) { 2939 start_ref_tag++; 2940 goto skipit; 2941 } 2942 2943 /* First Guard Tag checking */ 2944 if (chk_guard) { 2945 guard_tag = src->guard_tag; 2946 if (lpfc_cmd_guard_csum(cmd)) 2947 sum = lpfc_bg_csum(data_src, 2948 blksize); 2949 else 2950 sum = lpfc_bg_crc(data_src, 2951 blksize); 2952 if ((guard_tag != sum)) { 2953 err_type = BGS_GUARD_ERR_MASK; 2954 goto out; 2955 } 2956 } 2957 2958 /* Reference Tag checking */ 2959 ref_tag = be32_to_cpu(src->ref_tag); 2960 if (chk_ref && (ref_tag != start_ref_tag)) { 2961 err_type = BGS_REFTAG_ERR_MASK; 2962 goto out; 2963 } 2964 start_ref_tag++; 2965 2966 /* App Tag checking */ 2967 app_tag = src->app_tag; 2968 if (chk_app && (app_tag != start_app_tag)) { 2969 err_type = BGS_APPTAG_ERR_MASK; 2970 goto out; 2971 } 2972 skipit: 2973 len -= sizeof(struct scsi_dif_tuple); 2974 if (len < 0) 2975 len = 0; 2976 src++; 2977 2978 data_src += blksize; 2979 data_len -= blksize; 2980 2981 /* 2982 * Are we at the end of the Data segment? 2983 * The data segment is only used for Guard 2984 * tag checking. 2985 */ 2986 if (chk_guard && (data_len == 0)) { 2987 chk_guard = 0; 2988 sgde = sg_next(sgde); 2989 if (!sgde) 2990 goto out; 2991 2992 data_src = (uint8_t *)sg_virt(sgde); 2993 data_len = sgde->length; 2994 if ((data_len & (blksize - 1)) == 0) 2995 chk_guard = 1; 2996 } 2997 } 2998 2999 /* Goto the next Protection data segment */ 3000 sgpe = sg_next(sgpe); 3001 if (sgpe) { 3002 src = (struct scsi_dif_tuple *)sg_virt(sgpe); 3003 len = sgpe->length; 3004 } else { 3005 src = NULL; 3006 } 3007 protsegcnt--; 3008 } 3009 } 3010 out: 3011 if (err_type == BGS_GUARD_ERR_MASK) { 3012 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 3013 0x10, 0x1); 3014 cmd->result = DRIVER_SENSE << 24 3015 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 3016 phba->bg_guard_err_cnt++; 3017 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, 3018 "9069 BLKGRD: LBA %lx grd_tag error %x != %x\n", 3019 (unsigned long)scsi_get_lba(cmd), 3020 sum, guard_tag); 3021 3022 } else if (err_type == BGS_REFTAG_ERR_MASK) { 3023 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 3024 0x10, 0x3); 3025 cmd->result = DRIVER_SENSE << 24 3026 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 3027 3028 phba->bg_reftag_err_cnt++; 3029 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, 3030 "9066 BLKGRD: LBA %lx ref_tag error %x != %x\n", 3031 (unsigned long)scsi_get_lba(cmd), 3032 ref_tag, start_ref_tag); 3033 3034 } else if (err_type == BGS_APPTAG_ERR_MASK) { 3035 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 3036 0x10, 0x2); 3037 cmd->result = DRIVER_SENSE << 24 3038 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 3039 3040 phba->bg_apptag_err_cnt++; 3041 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, 3042 "9041 BLKGRD: LBA %lx app_tag error %x != %x\n", 3043 (unsigned long)scsi_get_lba(cmd), 3044 app_tag, start_app_tag); 3045 } 3046 } 3047 3048 3049 /* 3050 * This function checks for BlockGuard errors detected by 3051 * the HBA. In case of errors, the ASC/ASCQ fields in the 3052 * sense buffer will be set accordingly, paired with 3053 * ILLEGAL_REQUEST to signal to the kernel that the HBA 3054 * detected corruption. 3055 * 3056 * Returns: 3057 * 0 - No error found 3058 * 1 - BlockGuard error found 3059 * -1 - Internal error (bad profile, ...etc) 3060 */ 3061 static int 3062 lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd, 3063 struct lpfc_iocbq *pIocbOut) 3064 { 3065 struct scsi_cmnd *cmd = lpfc_cmd->pCmd; 3066 struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg; 3067 int ret = 0; 3068 uint32_t bghm = bgf->bghm; 3069 uint32_t bgstat = bgf->bgstat; 3070 uint64_t failing_sector = 0; 3071 3072 spin_lock(&_dump_buf_lock); 3073 if (!_dump_buf_done) { 3074 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9070 BLKGRD: Saving" 3075 " Data for %u blocks to debugfs\n", 3076 (cmd->cmnd[7] << 8 | cmd->cmnd[8])); 3077 lpfc_debug_save_data(phba, cmd); 3078 3079 /* If we have a prot sgl, save the DIF buffer */ 3080 if (lpfc_prot_group_type(phba, cmd) == 3081 LPFC_PG_TYPE_DIF_BUF) { 3082 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9071 BLKGRD: " 3083 "Saving DIF for %u blocks to debugfs\n", 3084 (cmd->cmnd[7] << 8 | cmd->cmnd[8])); 3085 lpfc_debug_save_dif(phba, cmd); 3086 } 3087 3088 _dump_buf_done = 1; 3089 } 3090 spin_unlock(&_dump_buf_lock); 3091 3092 if (lpfc_bgs_get_invalid_prof(bgstat)) { 3093 cmd->result = ScsiResult(DID_ERROR, 0); 3094 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, 3095 "9072 BLKGRD: Invalid BG Profile in cmd" 3096 " 0x%x lba 0x%llx blk cnt 0x%x " 3097 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], 3098 (unsigned long long)scsi_get_lba(cmd), 3099 blk_rq_sectors(cmd->request), bgstat, bghm); 3100 ret = (-1); 3101 goto out; 3102 } 3103 3104 if (lpfc_bgs_get_uninit_dif_block(bgstat)) { 3105 cmd->result = ScsiResult(DID_ERROR, 0); 3106 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, 3107 "9073 BLKGRD: Invalid BG PDIF Block in cmd" 3108 " 0x%x lba 0x%llx blk cnt 0x%x " 3109 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], 3110 (unsigned long long)scsi_get_lba(cmd), 3111 blk_rq_sectors(cmd->request), bgstat, bghm); 3112 ret = (-1); 3113 goto out; 3114 } 3115 3116 if (lpfc_bgs_get_guard_err(bgstat)) { 3117 ret = 1; 3118 3119 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 3120 0x10, 0x1); 3121 cmd->result = DRIVER_SENSE << 24 3122 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 3123 phba->bg_guard_err_cnt++; 3124 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, 3125 "9055 BLKGRD: Guard Tag error in cmd" 3126 " 0x%x lba 0x%llx blk cnt 0x%x " 3127 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], 3128 (unsigned long long)scsi_get_lba(cmd), 3129 blk_rq_sectors(cmd->request), bgstat, bghm); 3130 } 3131 3132 if (lpfc_bgs_get_reftag_err(bgstat)) { 3133 ret = 1; 3134 3135 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 3136 0x10, 0x3); 3137 cmd->result = DRIVER_SENSE << 24 3138 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 3139 3140 phba->bg_reftag_err_cnt++; 3141 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, 3142 "9056 BLKGRD: Ref Tag error in cmd" 3143 " 0x%x lba 0x%llx blk cnt 0x%x " 3144 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], 3145 (unsigned long long)scsi_get_lba(cmd), 3146 blk_rq_sectors(cmd->request), bgstat, bghm); 3147 } 3148 3149 if (lpfc_bgs_get_apptag_err(bgstat)) { 3150 ret = 1; 3151 3152 scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, 3153 0x10, 0x2); 3154 cmd->result = DRIVER_SENSE << 24 3155 | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); 3156 3157 phba->bg_apptag_err_cnt++; 3158 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, 3159 "9061 BLKGRD: App Tag error in cmd" 3160 " 0x%x lba 0x%llx blk cnt 0x%x " 3161 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], 3162 (unsigned long long)scsi_get_lba(cmd), 3163 blk_rq_sectors(cmd->request), bgstat, bghm); 3164 } 3165 3166 if (lpfc_bgs_get_hi_water_mark_present(bgstat)) { 3167 /* 3168 * setup sense data descriptor 0 per SPC-4 as an information 3169 * field, and put the failing LBA in it. 3170 * This code assumes there was also a guard/app/ref tag error 3171 * indication. 3172 */ 3173 cmd->sense_buffer[7] = 0xc; /* Additional sense length */ 3174 cmd->sense_buffer[8] = 0; /* Information descriptor type */ 3175 cmd->sense_buffer[9] = 0xa; /* Additional descriptor length */ 3176 cmd->sense_buffer[10] = 0x80; /* Validity bit */ 3177 3178 /* bghm is a "on the wire" FC frame based count */ 3179 switch (scsi_get_prot_op(cmd)) { 3180 case SCSI_PROT_READ_INSERT: 3181 case SCSI_PROT_WRITE_STRIP: 3182 bghm /= cmd->device->sector_size; 3183 break; 3184 case SCSI_PROT_READ_STRIP: 3185 case SCSI_PROT_WRITE_INSERT: 3186 case SCSI_PROT_READ_PASS: 3187 case SCSI_PROT_WRITE_PASS: 3188 bghm /= (cmd->device->sector_size + 3189 sizeof(struct scsi_dif_tuple)); 3190 break; 3191 } 3192 3193 failing_sector = scsi_get_lba(cmd); 3194 failing_sector += bghm; 3195 3196 /* Descriptor Information */ 3197 put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]); 3198 } 3199 3200 if (!ret) { 3201 /* No error was reported - problem in FW? */ 3202 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, 3203 "9057 BLKGRD: Unknown error in cmd" 3204 " 0x%x lba 0x%llx blk cnt 0x%x " 3205 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], 3206 (unsigned long long)scsi_get_lba(cmd), 3207 blk_rq_sectors(cmd->request), bgstat, bghm); 3208 3209 /* Calcuate what type of error it was */ 3210 lpfc_calc_bg_err(phba, lpfc_cmd); 3211 } 3212 out: 3213 return ret; 3214 } 3215 3216 /** 3217 * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec 3218 * @phba: The Hba for which this call is being executed. 3219 * @lpfc_cmd: The scsi buffer which is going to be mapped. 3220 * 3221 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd 3222 * field of @lpfc_cmd for device with SLI-4 interface spec. 3223 * 3224 * Return codes: 3225 * 1 - Error 3226 * 0 - Success 3227 **/ 3228 static int 3229 lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 3230 { 3231 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 3232 struct scatterlist *sgel = NULL; 3233 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 3234 struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl; 3235 struct sli4_sge *first_data_sgl; 3236 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 3237 dma_addr_t physaddr; 3238 uint32_t num_bde = 0; 3239 uint32_t dma_len; 3240 uint32_t dma_offset = 0; 3241 int nseg; 3242 struct ulp_bde64 *bde; 3243 3244 /* 3245 * There are three possibilities here - use scatter-gather segment, use 3246 * the single mapping, or neither. Start the lpfc command prep by 3247 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first 3248 * data bde entry. 3249 */ 3250 if (scsi_sg_count(scsi_cmnd)) { 3251 /* 3252 * The driver stores the segment count returned from pci_map_sg 3253 * because this a count of dma-mappings used to map the use_sg 3254 * pages. They are not guaranteed to be the same for those 3255 * architectures that implement an IOMMU. 3256 */ 3257 3258 nseg = scsi_dma_map(scsi_cmnd); 3259 if (unlikely(nseg <= 0)) 3260 return 1; 3261 sgl += 1; 3262 /* clear the last flag in the fcp_rsp map entry */ 3263 sgl->word2 = le32_to_cpu(sgl->word2); 3264 bf_set(lpfc_sli4_sge_last, sgl, 0); 3265 sgl->word2 = cpu_to_le32(sgl->word2); 3266 sgl += 1; 3267 first_data_sgl = sgl; 3268 lpfc_cmd->seg_cnt = nseg; 3269 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { 3270 lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:" 3271 " %s: Too many sg segments from " 3272 "dma_map_sg. Config %d, seg_cnt %d\n", 3273 __func__, phba->cfg_sg_seg_cnt, 3274 lpfc_cmd->seg_cnt); 3275 lpfc_cmd->seg_cnt = 0; 3276 scsi_dma_unmap(scsi_cmnd); 3277 return 1; 3278 } 3279 3280 /* 3281 * The driver established a maximum scatter-gather segment count 3282 * during probe that limits the number of sg elements in any 3283 * single scsi command. Just run through the seg_cnt and format 3284 * the sge's. 3285 * When using SLI-3 the driver will try to fit all the BDEs into 3286 * the IOCB. If it can't then the BDEs get added to a BPL as it 3287 * does for SLI-2 mode. 3288 */ 3289 scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) { 3290 physaddr = sg_dma_address(sgel); 3291 dma_len = sg_dma_len(sgel); 3292 sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr)); 3293 sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr)); 3294 sgl->word2 = le32_to_cpu(sgl->word2); 3295 if ((num_bde + 1) == nseg) 3296 bf_set(lpfc_sli4_sge_last, sgl, 1); 3297 else 3298 bf_set(lpfc_sli4_sge_last, sgl, 0); 3299 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset); 3300 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA); 3301 sgl->word2 = cpu_to_le32(sgl->word2); 3302 sgl->sge_len = cpu_to_le32(dma_len); 3303 dma_offset += dma_len; 3304 sgl++; 3305 } 3306 /* setup the performance hint (first data BDE) if enabled */ 3307 if (phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) { 3308 bde = (struct ulp_bde64 *) 3309 &(iocb_cmd->unsli3.sli3Words[5]); 3310 bde->addrLow = first_data_sgl->addr_lo; 3311 bde->addrHigh = first_data_sgl->addr_hi; 3312 bde->tus.f.bdeSize = 3313 le32_to_cpu(first_data_sgl->sge_len); 3314 bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 3315 bde->tus.w = cpu_to_le32(bde->tus.w); 3316 } 3317 } else { 3318 sgl += 1; 3319 /* clear the last flag in the fcp_rsp map entry */ 3320 sgl->word2 = le32_to_cpu(sgl->word2); 3321 bf_set(lpfc_sli4_sge_last, sgl, 1); 3322 sgl->word2 = cpu_to_le32(sgl->word2); 3323 } 3324 3325 /* 3326 * Finish initializing those IOCB fields that are dependent on the 3327 * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is 3328 * explicitly reinitialized. 3329 * all iocb memory resources are reused. 3330 */ 3331 fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd)); 3332 3333 /* 3334 * Due to difference in data length between DIF/non-DIF paths, 3335 * we need to set word 4 of IOCB here 3336 */ 3337 iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd); 3338 3339 /* 3340 * If the OAS driver feature is enabled and the lun is enabled for 3341 * OAS, set the oas iocb related flags. 3342 */ 3343 if ((phba->cfg_fof) && ((struct lpfc_device_data *) 3344 scsi_cmnd->device->hostdata)->oas_enabled) { 3345 lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF); 3346 lpfc_cmd->cur_iocbq.priority = ((struct lpfc_device_data *) 3347 scsi_cmnd->device->hostdata)->priority; 3348 } 3349 return 0; 3350 } 3351 3352 /** 3353 * lpfc_bg_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec 3354 * @phba: The Hba for which this call is being executed. 3355 * @lpfc_cmd: The scsi buffer which is going to be mapped. 3356 * 3357 * This is the protection/DIF aware version of 3358 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the 3359 * two functions eventually, but for now, it's here 3360 **/ 3361 static int 3362 lpfc_bg_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, 3363 struct lpfc_scsi_buf *lpfc_cmd) 3364 { 3365 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 3366 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 3367 struct sli4_sge *sgl = (struct sli4_sge *)(lpfc_cmd->fcp_bpl); 3368 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 3369 uint32_t num_sge = 0; 3370 int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction; 3371 int prot_group_type = 0; 3372 int fcpdl; 3373 3374 /* 3375 * Start the lpfc command prep by bumping the sgl beyond fcp_cmnd 3376 * fcp_rsp regions to the first data sge entry 3377 */ 3378 if (scsi_sg_count(scsi_cmnd)) { 3379 /* 3380 * The driver stores the segment count returned from pci_map_sg 3381 * because this a count of dma-mappings used to map the use_sg 3382 * pages. They are not guaranteed to be the same for those 3383 * architectures that implement an IOMMU. 3384 */ 3385 datasegcnt = dma_map_sg(&phba->pcidev->dev, 3386 scsi_sglist(scsi_cmnd), 3387 scsi_sg_count(scsi_cmnd), datadir); 3388 if (unlikely(!datasegcnt)) 3389 return 1; 3390 3391 sgl += 1; 3392 /* clear the last flag in the fcp_rsp map entry */ 3393 sgl->word2 = le32_to_cpu(sgl->word2); 3394 bf_set(lpfc_sli4_sge_last, sgl, 0); 3395 sgl->word2 = cpu_to_le32(sgl->word2); 3396 3397 sgl += 1; 3398 lpfc_cmd->seg_cnt = datasegcnt; 3399 3400 /* First check if data segment count from SCSI Layer is good */ 3401 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) 3402 goto err; 3403 3404 prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd); 3405 3406 switch (prot_group_type) { 3407 case LPFC_PG_TYPE_NO_DIF: 3408 /* Here we need to add a DISEED to the count */ 3409 if ((lpfc_cmd->seg_cnt + 1) > phba->cfg_total_seg_cnt) 3410 goto err; 3411 3412 num_sge = lpfc_bg_setup_sgl(phba, scsi_cmnd, sgl, 3413 datasegcnt); 3414 3415 /* we should have 2 or more entries in buffer list */ 3416 if (num_sge < 2) 3417 goto err; 3418 break; 3419 3420 case LPFC_PG_TYPE_DIF_BUF: 3421 /* 3422 * This type indicates that protection buffers are 3423 * passed to the driver, so that needs to be prepared 3424 * for DMA 3425 */ 3426 protsegcnt = dma_map_sg(&phba->pcidev->dev, 3427 scsi_prot_sglist(scsi_cmnd), 3428 scsi_prot_sg_count(scsi_cmnd), datadir); 3429 if (unlikely(!protsegcnt)) { 3430 scsi_dma_unmap(scsi_cmnd); 3431 return 1; 3432 } 3433 3434 lpfc_cmd->prot_seg_cnt = protsegcnt; 3435 /* 3436 * There is a minimun of 3 SGEs used for every 3437 * protection data segment. 3438 */ 3439 if ((lpfc_cmd->prot_seg_cnt * 3) > 3440 (phba->cfg_total_seg_cnt - 2)) 3441 goto err; 3442 3443 num_sge = lpfc_bg_setup_sgl_prot(phba, scsi_cmnd, sgl, 3444 datasegcnt, protsegcnt); 3445 3446 /* we should have 3 or more entries in buffer list */ 3447 if ((num_sge < 3) || 3448 (num_sge > phba->cfg_total_seg_cnt)) 3449 goto err; 3450 break; 3451 3452 case LPFC_PG_TYPE_INVALID: 3453 default: 3454 scsi_dma_unmap(scsi_cmnd); 3455 lpfc_cmd->seg_cnt = 0; 3456 3457 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 3458 "9083 Unexpected protection group %i\n", 3459 prot_group_type); 3460 return 1; 3461 } 3462 } 3463 3464 switch (scsi_get_prot_op(scsi_cmnd)) { 3465 case SCSI_PROT_WRITE_STRIP: 3466 case SCSI_PROT_READ_STRIP: 3467 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_STRIP; 3468 break; 3469 case SCSI_PROT_WRITE_INSERT: 3470 case SCSI_PROT_READ_INSERT: 3471 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_INSERT; 3472 break; 3473 case SCSI_PROT_WRITE_PASS: 3474 case SCSI_PROT_READ_PASS: 3475 lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_PASS; 3476 break; 3477 } 3478 3479 fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd); 3480 fcp_cmnd->fcpDl = be32_to_cpu(fcpdl); 3481 3482 /* 3483 * Due to difference in data length between DIF/non-DIF paths, 3484 * we need to set word 4 of IOCB here 3485 */ 3486 iocb_cmd->un.fcpi.fcpi_parm = fcpdl; 3487 3488 /* 3489 * If the OAS driver feature is enabled and the lun is enabled for 3490 * OAS, set the oas iocb related flags. 3491 */ 3492 if ((phba->cfg_fof) && ((struct lpfc_device_data *) 3493 scsi_cmnd->device->hostdata)->oas_enabled) 3494 lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF); 3495 3496 return 0; 3497 err: 3498 if (lpfc_cmd->seg_cnt) 3499 scsi_dma_unmap(scsi_cmnd); 3500 if (lpfc_cmd->prot_seg_cnt) 3501 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd), 3502 scsi_prot_sg_count(scsi_cmnd), 3503 scsi_cmnd->sc_data_direction); 3504 3505 lpfc_printf_log(phba, KERN_ERR, LOG_FCP, 3506 "9084 Cannot setup S/G List for HBA" 3507 "IO segs %d/%d SGL %d SCSI %d: %d %d\n", 3508 lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt, 3509 phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt, 3510 prot_group_type, num_sge); 3511 3512 lpfc_cmd->seg_cnt = 0; 3513 lpfc_cmd->prot_seg_cnt = 0; 3514 return 1; 3515 } 3516 3517 /** 3518 * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer 3519 * @phba: The Hba for which this call is being executed. 3520 * @lpfc_cmd: The scsi buffer which is going to be mapped. 3521 * 3522 * This routine wraps the actual DMA mapping function pointer from the 3523 * lpfc_hba struct. 3524 * 3525 * Return codes: 3526 * 1 - Error 3527 * 0 - Success 3528 **/ 3529 static inline int 3530 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 3531 { 3532 return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd); 3533 } 3534 3535 /** 3536 * lpfc_bg_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer 3537 * using BlockGuard. 3538 * @phba: The Hba for which this call is being executed. 3539 * @lpfc_cmd: The scsi buffer which is going to be mapped. 3540 * 3541 * This routine wraps the actual DMA mapping function pointer from the 3542 * lpfc_hba struct. 3543 * 3544 * Return codes: 3545 * 1 - Error 3546 * 0 - Success 3547 **/ 3548 static inline int 3549 lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 3550 { 3551 return phba->lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd); 3552 } 3553 3554 /** 3555 * lpfc_send_scsi_error_event - Posts an event when there is SCSI error 3556 * @phba: Pointer to hba context object. 3557 * @vport: Pointer to vport object. 3558 * @lpfc_cmd: Pointer to lpfc scsi command which reported the error. 3559 * @rsp_iocb: Pointer to response iocb object which reported error. 3560 * 3561 * This function posts an event when there is a SCSI command reporting 3562 * error from the scsi device. 3563 **/ 3564 static void 3565 lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport, 3566 struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) { 3567 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd; 3568 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp; 3569 uint32_t resp_info = fcprsp->rspStatus2; 3570 uint32_t scsi_status = fcprsp->rspStatus3; 3571 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm; 3572 struct lpfc_fast_path_event *fast_path_evt = NULL; 3573 struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode; 3574 unsigned long flags; 3575 3576 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 3577 return; 3578 3579 /* If there is queuefull or busy condition send a scsi event */ 3580 if ((cmnd->result == SAM_STAT_TASK_SET_FULL) || 3581 (cmnd->result == SAM_STAT_BUSY)) { 3582 fast_path_evt = lpfc_alloc_fast_evt(phba); 3583 if (!fast_path_evt) 3584 return; 3585 fast_path_evt->un.scsi_evt.event_type = 3586 FC_REG_SCSI_EVENT; 3587 fast_path_evt->un.scsi_evt.subcategory = 3588 (cmnd->result == SAM_STAT_TASK_SET_FULL) ? 3589 LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY; 3590 fast_path_evt->un.scsi_evt.lun = cmnd->device->lun; 3591 memcpy(&fast_path_evt->un.scsi_evt.wwpn, 3592 &pnode->nlp_portname, sizeof(struct lpfc_name)); 3593 memcpy(&fast_path_evt->un.scsi_evt.wwnn, 3594 &pnode->nlp_nodename, sizeof(struct lpfc_name)); 3595 } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen && 3596 ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) { 3597 fast_path_evt = lpfc_alloc_fast_evt(phba); 3598 if (!fast_path_evt) 3599 return; 3600 fast_path_evt->un.check_cond_evt.scsi_event.event_type = 3601 FC_REG_SCSI_EVENT; 3602 fast_path_evt->un.check_cond_evt.scsi_event.subcategory = 3603 LPFC_EVENT_CHECK_COND; 3604 fast_path_evt->un.check_cond_evt.scsi_event.lun = 3605 cmnd->device->lun; 3606 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn, 3607 &pnode->nlp_portname, sizeof(struct lpfc_name)); 3608 memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn, 3609 &pnode->nlp_nodename, sizeof(struct lpfc_name)); 3610 fast_path_evt->un.check_cond_evt.sense_key = 3611 cmnd->sense_buffer[2] & 0xf; 3612 fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12]; 3613 fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13]; 3614 } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) && 3615 fcpi_parm && 3616 ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) || 3617 ((scsi_status == SAM_STAT_GOOD) && 3618 !(resp_info & (RESID_UNDER | RESID_OVER))))) { 3619 /* 3620 * If status is good or resid does not match with fcp_param and 3621 * there is valid fcpi_parm, then there is a read_check error 3622 */ 3623 fast_path_evt = lpfc_alloc_fast_evt(phba); 3624 if (!fast_path_evt) 3625 return; 3626 fast_path_evt->un.read_check_error.header.event_type = 3627 FC_REG_FABRIC_EVENT; 3628 fast_path_evt->un.read_check_error.header.subcategory = 3629 LPFC_EVENT_FCPRDCHKERR; 3630 memcpy(&fast_path_evt->un.read_check_error.header.wwpn, 3631 &pnode->nlp_portname, sizeof(struct lpfc_name)); 3632 memcpy(&fast_path_evt->un.read_check_error.header.wwnn, 3633 &pnode->nlp_nodename, sizeof(struct lpfc_name)); 3634 fast_path_evt->un.read_check_error.lun = cmnd->device->lun; 3635 fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0]; 3636 fast_path_evt->un.read_check_error.fcpiparam = 3637 fcpi_parm; 3638 } else 3639 return; 3640 3641 fast_path_evt->vport = vport; 3642 spin_lock_irqsave(&phba->hbalock, flags); 3643 list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list); 3644 spin_unlock_irqrestore(&phba->hbalock, flags); 3645 lpfc_worker_wake_up(phba); 3646 return; 3647 } 3648 3649 /** 3650 * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev 3651 * @phba: The HBA for which this call is being executed. 3652 * @psb: The scsi buffer which is going to be un-mapped. 3653 * 3654 * This routine does DMA un-mapping of scatter gather list of scsi command 3655 * field of @lpfc_cmd for device with SLI-3 interface spec. 3656 **/ 3657 static void 3658 lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) 3659 { 3660 /* 3661 * There are only two special cases to consider. (1) the scsi command 3662 * requested scatter-gather usage or (2) the scsi command allocated 3663 * a request buffer, but did not request use_sg. There is a third 3664 * case, but it does not require resource deallocation. 3665 */ 3666 if (psb->seg_cnt > 0) 3667 scsi_dma_unmap(psb->pCmd); 3668 if (psb->prot_seg_cnt > 0) 3669 dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd), 3670 scsi_prot_sg_count(psb->pCmd), 3671 psb->pCmd->sc_data_direction); 3672 } 3673 3674 /** 3675 * lpfc_handler_fcp_err - FCP response handler 3676 * @vport: The virtual port for which this call is being executed. 3677 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure. 3678 * @rsp_iocb: The response IOCB which contains FCP error. 3679 * 3680 * This routine is called to process response IOCB with status field 3681 * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command 3682 * based upon SCSI and FCP error. 3683 **/ 3684 static void 3685 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, 3686 struct lpfc_iocbq *rsp_iocb) 3687 { 3688 struct lpfc_hba *phba = vport->phba; 3689 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd; 3690 struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd; 3691 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp; 3692 uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm; 3693 uint32_t resp_info = fcprsp->rspStatus2; 3694 uint32_t scsi_status = fcprsp->rspStatus3; 3695 uint32_t *lp; 3696 uint32_t host_status = DID_OK; 3697 uint32_t rsplen = 0; 3698 uint32_t fcpDl; 3699 uint32_t logit = LOG_FCP | LOG_FCP_ERROR; 3700 3701 3702 /* 3703 * If this is a task management command, there is no 3704 * scsi packet associated with this lpfc_cmd. The driver 3705 * consumes it. 3706 */ 3707 if (fcpcmd->fcpCntl2) { 3708 scsi_status = 0; 3709 goto out; 3710 } 3711 3712 if (resp_info & RSP_LEN_VALID) { 3713 rsplen = be32_to_cpu(fcprsp->rspRspLen); 3714 if (rsplen != 0 && rsplen != 4 && rsplen != 8) { 3715 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3716 "2719 Invalid response length: " 3717 "tgt x%x lun x%llx cmnd x%x rsplen x%x\n", 3718 cmnd->device->id, 3719 cmnd->device->lun, cmnd->cmnd[0], 3720 rsplen); 3721 host_status = DID_ERROR; 3722 goto out; 3723 } 3724 if (fcprsp->rspInfo3 != RSP_NO_FAILURE) { 3725 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 3726 "2757 Protocol failure detected during " 3727 "processing of FCP I/O op: " 3728 "tgt x%x lun x%llx cmnd x%x rspInfo3 x%x\n", 3729 cmnd->device->id, 3730 cmnd->device->lun, cmnd->cmnd[0], 3731 fcprsp->rspInfo3); 3732 host_status = DID_ERROR; 3733 goto out; 3734 } 3735 } 3736 3737 if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) { 3738 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen); 3739 if (snslen > SCSI_SENSE_BUFFERSIZE) 3740 snslen = SCSI_SENSE_BUFFERSIZE; 3741 3742 if (resp_info & RSP_LEN_VALID) 3743 rsplen = be32_to_cpu(fcprsp->rspRspLen); 3744 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen); 3745 } 3746 lp = (uint32_t *)cmnd->sense_buffer; 3747 3748 /* special handling for under run conditions */ 3749 if (!scsi_status && (resp_info & RESID_UNDER)) { 3750 /* don't log under runs if fcp set... */ 3751 if (vport->cfg_log_verbose & LOG_FCP) 3752 logit = LOG_FCP_ERROR; 3753 /* unless operator says so */ 3754 if (vport->cfg_log_verbose & LOG_FCP_UNDER) 3755 logit = LOG_FCP_UNDER; 3756 } 3757 3758 lpfc_printf_vlog(vport, KERN_WARNING, logit, 3759 "9024 FCP command x%x failed: x%x SNS x%x x%x " 3760 "Data: x%x x%x x%x x%x x%x\n", 3761 cmnd->cmnd[0], scsi_status, 3762 be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info, 3763 be32_to_cpu(fcprsp->rspResId), 3764 be32_to_cpu(fcprsp->rspSnsLen), 3765 be32_to_cpu(fcprsp->rspRspLen), 3766 fcprsp->rspInfo3); 3767 3768 scsi_set_resid(cmnd, 0); 3769 fcpDl = be32_to_cpu(fcpcmd->fcpDl); 3770 if (resp_info & RESID_UNDER) { 3771 scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId)); 3772 3773 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_UNDER, 3774 "9025 FCP Read Underrun, expected %d, " 3775 "residual %d Data: x%x x%x x%x\n", 3776 fcpDl, 3777 scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0], 3778 cmnd->underflow); 3779 3780 /* 3781 * If there is an under run check if under run reported by 3782 * storage array is same as the under run reported by HBA. 3783 * If this is not same, there is a dropped frame. 3784 */ 3785 if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) && 3786 fcpi_parm && 3787 (scsi_get_resid(cmnd) != fcpi_parm)) { 3788 lpfc_printf_vlog(vport, KERN_WARNING, 3789 LOG_FCP | LOG_FCP_ERROR, 3790 "9026 FCP Read Check Error " 3791 "and Underrun Data: x%x x%x x%x x%x\n", 3792 fcpDl, 3793 scsi_get_resid(cmnd), fcpi_parm, 3794 cmnd->cmnd[0]); 3795 scsi_set_resid(cmnd, scsi_bufflen(cmnd)); 3796 host_status = DID_ERROR; 3797 } 3798 /* 3799 * The cmnd->underflow is the minimum number of bytes that must 3800 * be transferred for this command. Provided a sense condition 3801 * is not present, make sure the actual amount transferred is at 3802 * least the underflow value or fail. 3803 */ 3804 if (!(resp_info & SNS_LEN_VALID) && 3805 (scsi_status == SAM_STAT_GOOD) && 3806 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) 3807 < cmnd->underflow)) { 3808 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 3809 "9027 FCP command x%x residual " 3810 "underrun converted to error " 3811 "Data: x%x x%x x%x\n", 3812 cmnd->cmnd[0], scsi_bufflen(cmnd), 3813 scsi_get_resid(cmnd), cmnd->underflow); 3814 host_status = DID_ERROR; 3815 } 3816 } else if (resp_info & RESID_OVER) { 3817 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 3818 "9028 FCP command x%x residual overrun error. " 3819 "Data: x%x x%x\n", cmnd->cmnd[0], 3820 scsi_bufflen(cmnd), scsi_get_resid(cmnd)); 3821 host_status = DID_ERROR; 3822 3823 /* 3824 * Check SLI validation that all the transfer was actually done 3825 * (fcpi_parm should be zero). Apply check only to reads. 3826 */ 3827 } else if (fcpi_parm) { 3828 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR, 3829 "9029 FCP %s Check Error xri x%x Data: " 3830 "x%x x%x x%x x%x x%x\n", 3831 ((cmnd->sc_data_direction == DMA_FROM_DEVICE) ? 3832 "Read" : "Write"), 3833 ((phba->sli_rev == LPFC_SLI_REV4) ? 3834 lpfc_cmd->cur_iocbq.sli4_xritag : 3835 rsp_iocb->iocb.ulpContext), 3836 fcpDl, be32_to_cpu(fcprsp->rspResId), 3837 fcpi_parm, cmnd->cmnd[0], scsi_status); 3838 3839 /* There is some issue with the LPe12000 that causes it 3840 * to miscalculate the fcpi_parm and falsely trip this 3841 * recovery logic. Detect this case and don't error when true. 3842 */ 3843 if (fcpi_parm > fcpDl) 3844 goto out; 3845 3846 switch (scsi_status) { 3847 case SAM_STAT_GOOD: 3848 case SAM_STAT_CHECK_CONDITION: 3849 /* Fabric dropped a data frame. Fail any successful 3850 * command in which we detected dropped frames. 3851 * A status of good or some check conditions could 3852 * be considered a successful command. 3853 */ 3854 host_status = DID_ERROR; 3855 break; 3856 } 3857 scsi_set_resid(cmnd, scsi_bufflen(cmnd)); 3858 } 3859 3860 out: 3861 cmnd->result = ScsiResult(host_status, scsi_status); 3862 lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb); 3863 } 3864 3865 /** 3866 * lpfc_sli4_scmd_to_wqidx_distr - scsi command to SLI4 WQ index distribution 3867 * @phba: Pointer to HBA context object. 3868 * 3869 * This routine performs a roundrobin SCSI command to SLI4 FCP WQ index 3870 * distribution. This is called by __lpfc_sli_issue_iocb_s4() with the hbalock 3871 * held. 3872 * If scsi-mq is enabled, get the default block layer mapping of software queues 3873 * to hardware queues. This information is saved in request tag. 3874 * 3875 * Return: index into SLI4 fast-path FCP queue index. 3876 **/ 3877 int lpfc_sli4_scmd_to_wqidx_distr(struct lpfc_hba *phba, 3878 struct lpfc_scsi_buf *lpfc_cmd) 3879 { 3880 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd; 3881 struct lpfc_vector_map_info *cpup; 3882 int chann, cpu; 3883 uint32_t tag; 3884 uint16_t hwq; 3885 3886 if (cmnd && shost_use_blk_mq(cmnd->device->host)) { 3887 tag = blk_mq_unique_tag(cmnd->request); 3888 hwq = blk_mq_unique_tag_to_hwq(tag); 3889 3890 return hwq; 3891 } 3892 3893 if (phba->cfg_fcp_io_sched == LPFC_FCP_SCHED_BY_CPU 3894 && phba->cfg_fcp_io_channel > 1) { 3895 cpu = smp_processor_id(); 3896 if (cpu < phba->sli4_hba.num_present_cpu) { 3897 cpup = phba->sli4_hba.cpu_map; 3898 cpup += cpu; 3899 return cpup->channel_id; 3900 } 3901 } 3902 chann = atomic_add_return(1, &phba->fcp_qidx); 3903 chann = chann % phba->cfg_fcp_io_channel; 3904 return chann; 3905 } 3906 3907 3908 /** 3909 * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine 3910 * @phba: The Hba for which this call is being executed. 3911 * @pIocbIn: The command IOCBQ for the scsi cmnd. 3912 * @pIocbOut: The response IOCBQ for the scsi cmnd. 3913 * 3914 * This routine assigns scsi command result by looking into response IOCB 3915 * status field appropriately. This routine handles QUEUE FULL condition as 3916 * well by ramping down device queue depth. 3917 **/ 3918 static void 3919 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, 3920 struct lpfc_iocbq *pIocbOut) 3921 { 3922 struct lpfc_scsi_buf *lpfc_cmd = 3923 (struct lpfc_scsi_buf *) pIocbIn->context1; 3924 struct lpfc_vport *vport = pIocbIn->vport; 3925 struct lpfc_rport_data *rdata = lpfc_cmd->rdata; 3926 struct lpfc_nodelist *pnode = rdata->pnode; 3927 struct scsi_cmnd *cmd; 3928 int depth; 3929 unsigned long flags; 3930 struct lpfc_fast_path_event *fast_path_evt; 3931 struct Scsi_Host *shost; 3932 uint32_t logit = LOG_FCP; 3933 3934 phba->fc4ScsiIoCmpls++; 3935 3936 /* Sanity check on return of outstanding command */ 3937 cmd = lpfc_cmd->pCmd; 3938 if (!cmd) 3939 return; 3940 shost = cmd->device->host; 3941 3942 lpfc_cmd->result = (pIocbOut->iocb.un.ulpWord[4] & IOERR_PARAM_MASK); 3943 lpfc_cmd->status = pIocbOut->iocb.ulpStatus; 3944 /* pick up SLI4 exhange busy status from HBA */ 3945 lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY; 3946 3947 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 3948 if (lpfc_cmd->prot_data_type) { 3949 struct scsi_dif_tuple *src = NULL; 3950 3951 src = (struct scsi_dif_tuple *)lpfc_cmd->prot_data_segment; 3952 /* 3953 * Used to restore any changes to protection 3954 * data for error injection. 3955 */ 3956 switch (lpfc_cmd->prot_data_type) { 3957 case LPFC_INJERR_REFTAG: 3958 src->ref_tag = 3959 lpfc_cmd->prot_data; 3960 break; 3961 case LPFC_INJERR_APPTAG: 3962 src->app_tag = 3963 (uint16_t)lpfc_cmd->prot_data; 3964 break; 3965 case LPFC_INJERR_GUARD: 3966 src->guard_tag = 3967 (uint16_t)lpfc_cmd->prot_data; 3968 break; 3969 default: 3970 break; 3971 } 3972 3973 lpfc_cmd->prot_data = 0; 3974 lpfc_cmd->prot_data_type = 0; 3975 lpfc_cmd->prot_data_segment = NULL; 3976 } 3977 #endif 3978 3979 if (pnode && NLP_CHK_NODE_ACT(pnode)) 3980 atomic_dec(&pnode->cmd_pending); 3981 3982 if (lpfc_cmd->status) { 3983 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT && 3984 (lpfc_cmd->result & IOERR_DRVR_MASK)) 3985 lpfc_cmd->status = IOSTAT_DRIVER_REJECT; 3986 else if (lpfc_cmd->status >= IOSTAT_CNT) 3987 lpfc_cmd->status = IOSTAT_DEFAULT; 3988 if (lpfc_cmd->status == IOSTAT_FCP_RSP_ERROR && 3989 !lpfc_cmd->fcp_rsp->rspStatus3 && 3990 (lpfc_cmd->fcp_rsp->rspStatus2 & RESID_UNDER) && 3991 !(vport->cfg_log_verbose & LOG_FCP_UNDER)) 3992 logit = 0; 3993 else 3994 logit = LOG_FCP | LOG_FCP_UNDER; 3995 lpfc_printf_vlog(vport, KERN_WARNING, logit, 3996 "9030 FCP cmd x%x failed <%d/%lld> " 3997 "status: x%x result: x%x " 3998 "sid: x%x did: x%x oxid: x%x " 3999 "Data: x%x x%x\n", 4000 cmd->cmnd[0], 4001 cmd->device ? cmd->device->id : 0xffff, 4002 cmd->device ? cmd->device->lun : 0xffff, 4003 lpfc_cmd->status, lpfc_cmd->result, 4004 vport->fc_myDID, 4005 (pnode) ? pnode->nlp_DID : 0, 4006 phba->sli_rev == LPFC_SLI_REV4 ? 4007 lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff, 4008 pIocbOut->iocb.ulpContext, 4009 lpfc_cmd->cur_iocbq.iocb.ulpIoTag); 4010 4011 switch (lpfc_cmd->status) { 4012 case IOSTAT_FCP_RSP_ERROR: 4013 /* Call FCP RSP handler to determine result */ 4014 lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut); 4015 break; 4016 case IOSTAT_NPORT_BSY: 4017 case IOSTAT_FABRIC_BSY: 4018 cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0); 4019 fast_path_evt = lpfc_alloc_fast_evt(phba); 4020 if (!fast_path_evt) 4021 break; 4022 fast_path_evt->un.fabric_evt.event_type = 4023 FC_REG_FABRIC_EVENT; 4024 fast_path_evt->un.fabric_evt.subcategory = 4025 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ? 4026 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY; 4027 if (pnode && NLP_CHK_NODE_ACT(pnode)) { 4028 memcpy(&fast_path_evt->un.fabric_evt.wwpn, 4029 &pnode->nlp_portname, 4030 sizeof(struct lpfc_name)); 4031 memcpy(&fast_path_evt->un.fabric_evt.wwnn, 4032 &pnode->nlp_nodename, 4033 sizeof(struct lpfc_name)); 4034 } 4035 fast_path_evt->vport = vport; 4036 fast_path_evt->work_evt.evt = 4037 LPFC_EVT_FASTPATH_MGMT_EVT; 4038 spin_lock_irqsave(&phba->hbalock, flags); 4039 list_add_tail(&fast_path_evt->work_evt.evt_listp, 4040 &phba->work_list); 4041 spin_unlock_irqrestore(&phba->hbalock, flags); 4042 lpfc_worker_wake_up(phba); 4043 break; 4044 case IOSTAT_LOCAL_REJECT: 4045 case IOSTAT_REMOTE_STOP: 4046 if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR || 4047 lpfc_cmd->result == 4048 IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR || 4049 lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR || 4050 lpfc_cmd->result == 4051 IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) { 4052 cmd->result = ScsiResult(DID_NO_CONNECT, 0); 4053 break; 4054 } 4055 if (lpfc_cmd->result == IOERR_INVALID_RPI || 4056 lpfc_cmd->result == IOERR_NO_RESOURCES || 4057 lpfc_cmd->result == IOERR_ABORT_REQUESTED || 4058 lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) { 4059 cmd->result = ScsiResult(DID_REQUEUE, 0); 4060 break; 4061 } 4062 if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED || 4063 lpfc_cmd->result == IOERR_TX_DMA_FAILED) && 4064 pIocbOut->iocb.unsli3.sli3_bg.bgstat) { 4065 if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) { 4066 /* 4067 * This is a response for a BG enabled 4068 * cmd. Parse BG error 4069 */ 4070 lpfc_parse_bg_err(phba, lpfc_cmd, 4071 pIocbOut); 4072 break; 4073 } else { 4074 lpfc_printf_vlog(vport, KERN_WARNING, 4075 LOG_BG, 4076 "9031 non-zero BGSTAT " 4077 "on unprotected cmd\n"); 4078 } 4079 } 4080 if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP) 4081 && (phba->sli_rev == LPFC_SLI_REV4) 4082 && (pnode && NLP_CHK_NODE_ACT(pnode))) { 4083 /* This IO was aborted by the target, we don't 4084 * know the rxid and because we did not send the 4085 * ABTS we cannot generate and RRQ. 4086 */ 4087 lpfc_set_rrq_active(phba, pnode, 4088 lpfc_cmd->cur_iocbq.sli4_lxritag, 4089 0, 0); 4090 } 4091 /* else: fall through */ 4092 default: 4093 cmd->result = ScsiResult(DID_ERROR, 0); 4094 break; 4095 } 4096 4097 if (!pnode || !NLP_CHK_NODE_ACT(pnode) 4098 || (pnode->nlp_state != NLP_STE_MAPPED_NODE)) 4099 cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 4100 SAM_STAT_BUSY); 4101 } else 4102 cmd->result = ScsiResult(DID_OK, 0); 4103 4104 if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) { 4105 uint32_t *lp = (uint32_t *)cmd->sense_buffer; 4106 4107 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 4108 "0710 Iodone <%d/%llu> cmd %p, error " 4109 "x%x SNS x%x x%x Data: x%x x%x\n", 4110 cmd->device->id, cmd->device->lun, cmd, 4111 cmd->result, *lp, *(lp + 3), cmd->retries, 4112 scsi_get_resid(cmd)); 4113 } 4114 4115 lpfc_update_stats(phba, lpfc_cmd); 4116 if (vport->cfg_max_scsicmpl_time && 4117 time_after(jiffies, lpfc_cmd->start_time + 4118 msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) { 4119 spin_lock_irqsave(shost->host_lock, flags); 4120 if (pnode && NLP_CHK_NODE_ACT(pnode)) { 4121 if (pnode->cmd_qdepth > 4122 atomic_read(&pnode->cmd_pending) && 4123 (atomic_read(&pnode->cmd_pending) > 4124 LPFC_MIN_TGT_QDEPTH) && 4125 ((cmd->cmnd[0] == READ_10) || 4126 (cmd->cmnd[0] == WRITE_10))) 4127 pnode->cmd_qdepth = 4128 atomic_read(&pnode->cmd_pending); 4129 4130 pnode->last_change_time = jiffies; 4131 } 4132 spin_unlock_irqrestore(shost->host_lock, flags); 4133 } else if (pnode && NLP_CHK_NODE_ACT(pnode)) { 4134 if ((pnode->cmd_qdepth < vport->cfg_tgt_queue_depth) && 4135 time_after(jiffies, pnode->last_change_time + 4136 msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) { 4137 spin_lock_irqsave(shost->host_lock, flags); 4138 depth = pnode->cmd_qdepth * LPFC_TGTQ_RAMPUP_PCENT 4139 / 100; 4140 depth = depth ? depth : 1; 4141 pnode->cmd_qdepth += depth; 4142 if (pnode->cmd_qdepth > vport->cfg_tgt_queue_depth) 4143 pnode->cmd_qdepth = vport->cfg_tgt_queue_depth; 4144 pnode->last_change_time = jiffies; 4145 spin_unlock_irqrestore(shost->host_lock, flags); 4146 } 4147 } 4148 4149 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd); 4150 4151 spin_lock_irqsave(&phba->hbalock, flags); 4152 lpfc_cmd->pCmd = NULL; 4153 spin_unlock_irqrestore(&phba->hbalock, flags); 4154 4155 /* The sdev is not guaranteed to be valid post scsi_done upcall. */ 4156 cmd->scsi_done(cmd); 4157 4158 /* 4159 * If there is a thread waiting for command completion 4160 * wake up the thread. 4161 */ 4162 spin_lock_irqsave(shost->host_lock, flags); 4163 if (lpfc_cmd->waitq) 4164 wake_up(lpfc_cmd->waitq); 4165 spin_unlock_irqrestore(shost->host_lock, flags); 4166 4167 lpfc_release_scsi_buf(phba, lpfc_cmd); 4168 } 4169 4170 /** 4171 * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB 4172 * @data: A pointer to the immediate command data portion of the IOCB. 4173 * @fcp_cmnd: The FCP Command that is provided by the SCSI layer. 4174 * 4175 * The routine copies the entire FCP command from @fcp_cmnd to @data while 4176 * byte swapping the data to big endian format for transmission on the wire. 4177 **/ 4178 static void 4179 lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd) 4180 { 4181 int i, j; 4182 for (i = 0, j = 0; i < sizeof(struct fcp_cmnd); 4183 i += sizeof(uint32_t), j++) { 4184 ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]); 4185 } 4186 } 4187 4188 /** 4189 * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit 4190 * @vport: The virtual port for which this call is being executed. 4191 * @lpfc_cmd: The scsi command which needs to send. 4192 * @pnode: Pointer to lpfc_nodelist. 4193 * 4194 * This routine initializes fcp_cmnd and iocb data structure from scsi command 4195 * to transfer for device with SLI3 interface spec. 4196 **/ 4197 static void 4198 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, 4199 struct lpfc_nodelist *pnode) 4200 { 4201 struct lpfc_hba *phba = vport->phba; 4202 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; 4203 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; 4204 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; 4205 struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq); 4206 int datadir = scsi_cmnd->sc_data_direction; 4207 uint8_t *ptr; 4208 bool sli4; 4209 uint32_t fcpdl; 4210 4211 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 4212 return; 4213 4214 lpfc_cmd->fcp_rsp->rspSnsLen = 0; 4215 /* clear task management bits */ 4216 lpfc_cmd->fcp_cmnd->fcpCntl2 = 0; 4217 4218 int_to_scsilun(lpfc_cmd->pCmd->device->lun, 4219 &lpfc_cmd->fcp_cmnd->fcp_lun); 4220 4221 ptr = &fcp_cmnd->fcpCdb[0]; 4222 memcpy(ptr, scsi_cmnd->cmnd, scsi_cmnd->cmd_len); 4223 if (scsi_cmnd->cmd_len < LPFC_FCP_CDB_LEN) { 4224 ptr += scsi_cmnd->cmd_len; 4225 memset(ptr, 0, (LPFC_FCP_CDB_LEN - scsi_cmnd->cmd_len)); 4226 } 4227 4228 fcp_cmnd->fcpCntl1 = SIMPLE_Q; 4229 4230 sli4 = (phba->sli_rev == LPFC_SLI_REV4); 4231 piocbq->iocb.un.fcpi.fcpi_XRdy = 0; 4232 4233 /* 4234 * There are three possibilities here - use scatter-gather segment, use 4235 * the single mapping, or neither. Start the lpfc command prep by 4236 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first 4237 * data bde entry. 4238 */ 4239 if (scsi_sg_count(scsi_cmnd)) { 4240 if (datadir == DMA_TO_DEVICE) { 4241 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR; 4242 iocb_cmd->ulpPU = PARM_READ_CHECK; 4243 if (vport->cfg_first_burst_size && 4244 (pnode->nlp_flag & NLP_FIRSTBURST)) { 4245 fcpdl = scsi_bufflen(scsi_cmnd); 4246 if (fcpdl < vport->cfg_first_burst_size) 4247 piocbq->iocb.un.fcpi.fcpi_XRdy = fcpdl; 4248 else 4249 piocbq->iocb.un.fcpi.fcpi_XRdy = 4250 vport->cfg_first_burst_size; 4251 } 4252 fcp_cmnd->fcpCntl3 = WRITE_DATA; 4253 phba->fc4ScsiOutputRequests++; 4254 } else { 4255 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR; 4256 iocb_cmd->ulpPU = PARM_READ_CHECK; 4257 fcp_cmnd->fcpCntl3 = READ_DATA; 4258 phba->fc4ScsiInputRequests++; 4259 } 4260 } else { 4261 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR; 4262 iocb_cmd->un.fcpi.fcpi_parm = 0; 4263 iocb_cmd->ulpPU = 0; 4264 fcp_cmnd->fcpCntl3 = 0; 4265 phba->fc4ScsiControlRequests++; 4266 } 4267 if (phba->sli_rev == 3 && 4268 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) 4269 lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd); 4270 /* 4271 * Finish initializing those IOCB fields that are independent 4272 * of the scsi_cmnd request_buffer 4273 */ 4274 piocbq->iocb.ulpContext = pnode->nlp_rpi; 4275 if (sli4) 4276 piocbq->iocb.ulpContext = 4277 phba->sli4_hba.rpi_ids[pnode->nlp_rpi]; 4278 if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE) 4279 piocbq->iocb.ulpFCP2Rcvy = 1; 4280 else 4281 piocbq->iocb.ulpFCP2Rcvy = 0; 4282 4283 piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f); 4284 piocbq->context1 = lpfc_cmd; 4285 piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl; 4286 piocbq->iocb.ulpTimeout = lpfc_cmd->timeout; 4287 piocbq->vport = vport; 4288 } 4289 4290 /** 4291 * lpfc_scsi_prep_task_mgmt_cmd - Convert SLI3 scsi TM cmd to FCP info unit 4292 * @vport: The virtual port for which this call is being executed. 4293 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure. 4294 * @lun: Logical unit number. 4295 * @task_mgmt_cmd: SCSI task management command. 4296 * 4297 * This routine creates FCP information unit corresponding to @task_mgmt_cmd 4298 * for device with SLI-3 interface spec. 4299 * 4300 * Return codes: 4301 * 0 - Error 4302 * 1 - Success 4303 **/ 4304 static int 4305 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport, 4306 struct lpfc_scsi_buf *lpfc_cmd, 4307 uint64_t lun, 4308 uint8_t task_mgmt_cmd) 4309 { 4310 struct lpfc_iocbq *piocbq; 4311 IOCB_t *piocb; 4312 struct fcp_cmnd *fcp_cmnd; 4313 struct lpfc_rport_data *rdata = lpfc_cmd->rdata; 4314 struct lpfc_nodelist *ndlp = rdata->pnode; 4315 4316 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) || 4317 ndlp->nlp_state != NLP_STE_MAPPED_NODE) 4318 return 0; 4319 4320 piocbq = &(lpfc_cmd->cur_iocbq); 4321 piocbq->vport = vport; 4322 4323 piocb = &piocbq->iocb; 4324 4325 fcp_cmnd = lpfc_cmd->fcp_cmnd; 4326 /* Clear out any old data in the FCP command area */ 4327 memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd)); 4328 int_to_scsilun(lun, &fcp_cmnd->fcp_lun); 4329 fcp_cmnd->fcpCntl2 = task_mgmt_cmd; 4330 if (vport->phba->sli_rev == 3 && 4331 !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED)) 4332 lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd); 4333 piocb->ulpCommand = CMD_FCP_ICMND64_CR; 4334 piocb->ulpContext = ndlp->nlp_rpi; 4335 if (vport->phba->sli_rev == LPFC_SLI_REV4) { 4336 piocb->ulpContext = 4337 vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]; 4338 } 4339 piocb->ulpFCP2Rcvy = (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) ? 1 : 0; 4340 piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f); 4341 piocb->ulpPU = 0; 4342 piocb->un.fcpi.fcpi_parm = 0; 4343 4344 /* ulpTimeout is only one byte */ 4345 if (lpfc_cmd->timeout > 0xff) { 4346 /* 4347 * Do not timeout the command at the firmware level. 4348 * The driver will provide the timeout mechanism. 4349 */ 4350 piocb->ulpTimeout = 0; 4351 } else 4352 piocb->ulpTimeout = lpfc_cmd->timeout; 4353 4354 if (vport->phba->sli_rev == LPFC_SLI_REV4) 4355 lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd); 4356 4357 return 1; 4358 } 4359 4360 /** 4361 * lpfc_scsi_api_table_setup - Set up scsi api function jump table 4362 * @phba: The hba struct for which this call is being executed. 4363 * @dev_grp: The HBA PCI-Device group number. 4364 * 4365 * This routine sets up the SCSI interface API function jump table in @phba 4366 * struct. 4367 * Returns: 0 - success, -ENODEV - failure. 4368 **/ 4369 int 4370 lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp) 4371 { 4372 4373 phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf; 4374 phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd; 4375 4376 switch (dev_grp) { 4377 case LPFC_PCI_DEV_LP: 4378 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s3; 4379 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3; 4380 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s3; 4381 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3; 4382 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3; 4383 break; 4384 case LPFC_PCI_DEV_OC: 4385 phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s4; 4386 phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4; 4387 phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s4; 4388 phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4; 4389 phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4; 4390 break; 4391 default: 4392 lpfc_printf_log(phba, KERN_ERR, LOG_INIT, 4393 "1418 Invalid HBA PCI-device group: 0x%x\n", 4394 dev_grp); 4395 return -ENODEV; 4396 break; 4397 } 4398 phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth; 4399 phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl; 4400 return 0; 4401 } 4402 4403 /** 4404 * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command 4405 * @phba: The Hba for which this call is being executed. 4406 * @cmdiocbq: Pointer to lpfc_iocbq data structure. 4407 * @rspiocbq: Pointer to lpfc_iocbq data structure. 4408 * 4409 * This routine is IOCB completion routine for device reset and target reset 4410 * routine. This routine release scsi buffer associated with lpfc_cmd. 4411 **/ 4412 static void 4413 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba, 4414 struct lpfc_iocbq *cmdiocbq, 4415 struct lpfc_iocbq *rspiocbq) 4416 { 4417 struct lpfc_scsi_buf *lpfc_cmd = 4418 (struct lpfc_scsi_buf *) cmdiocbq->context1; 4419 if (lpfc_cmd) 4420 lpfc_release_scsi_buf(phba, lpfc_cmd); 4421 return; 4422 } 4423 4424 /** 4425 * lpfc_info - Info entry point of scsi_host_template data structure 4426 * @host: The scsi host for which this call is being executed. 4427 * 4428 * This routine provides module information about hba. 4429 * 4430 * Reutrn code: 4431 * Pointer to char - Success. 4432 **/ 4433 const char * 4434 lpfc_info(struct Scsi_Host *host) 4435 { 4436 struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata; 4437 struct lpfc_hba *phba = vport->phba; 4438 int len, link_speed = 0; 4439 static char lpfcinfobuf[384]; 4440 4441 memset(lpfcinfobuf,0,384); 4442 if (phba && phba->pcidev){ 4443 strncpy(lpfcinfobuf, phba->ModelDesc, 256); 4444 len = strlen(lpfcinfobuf); 4445 snprintf(lpfcinfobuf + len, 4446 384-len, 4447 " on PCI bus %02x device %02x irq %d", 4448 phba->pcidev->bus->number, 4449 phba->pcidev->devfn, 4450 phba->pcidev->irq); 4451 len = strlen(lpfcinfobuf); 4452 if (phba->Port[0]) { 4453 snprintf(lpfcinfobuf + len, 4454 384-len, 4455 " port %s", 4456 phba->Port); 4457 } 4458 len = strlen(lpfcinfobuf); 4459 link_speed = lpfc_sli_port_speed_get(phba); 4460 if (link_speed != 0) 4461 snprintf(lpfcinfobuf + len, 384-len, 4462 " Logical Link Speed: %d Mbps", link_speed); 4463 } 4464 return lpfcinfobuf; 4465 } 4466 4467 /** 4468 * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba 4469 * @phba: The Hba for which this call is being executed. 4470 * 4471 * This routine modifies fcp_poll_timer field of @phba by cfg_poll_tmo. 4472 * The default value of cfg_poll_tmo is 10 milliseconds. 4473 **/ 4474 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba) 4475 { 4476 unsigned long poll_tmo_expires = 4477 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo)); 4478 4479 if (!list_empty(&phba->sli.sli3_ring[LPFC_FCP_RING].txcmplq)) 4480 mod_timer(&phba->fcp_poll_timer, 4481 poll_tmo_expires); 4482 } 4483 4484 /** 4485 * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA 4486 * @phba: The Hba for which this call is being executed. 4487 * 4488 * This routine starts the fcp_poll_timer of @phba. 4489 **/ 4490 void lpfc_poll_start_timer(struct lpfc_hba * phba) 4491 { 4492 lpfc_poll_rearm_timer(phba); 4493 } 4494 4495 /** 4496 * lpfc_poll_timeout - Restart polling timer 4497 * @ptr: Map to lpfc_hba data structure pointer. 4498 * 4499 * This routine restarts fcp_poll timer, when FCP ring polling is enable 4500 * and FCP Ring interrupt is disable. 4501 **/ 4502 4503 void lpfc_poll_timeout(unsigned long ptr) 4504 { 4505 struct lpfc_hba *phba = (struct lpfc_hba *) ptr; 4506 4507 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 4508 lpfc_sli_handle_fast_ring_event(phba, 4509 &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ); 4510 4511 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 4512 lpfc_poll_rearm_timer(phba); 4513 } 4514 } 4515 4516 /** 4517 * lpfc_queuecommand - scsi_host_template queuecommand entry point 4518 * @cmnd: Pointer to scsi_cmnd data structure. 4519 * @done: Pointer to done routine. 4520 * 4521 * Driver registers this routine to scsi midlayer to submit a @cmd to process. 4522 * This routine prepares an IOCB from scsi command and provides to firmware. 4523 * The @done callback is invoked after driver finished processing the command. 4524 * 4525 * Return value : 4526 * 0 - Success 4527 * SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily. 4528 **/ 4529 static int 4530 lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd) 4531 { 4532 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 4533 struct lpfc_hba *phba = vport->phba; 4534 struct lpfc_rport_data *rdata; 4535 struct lpfc_nodelist *ndlp; 4536 struct lpfc_scsi_buf *lpfc_cmd; 4537 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 4538 int err; 4539 4540 rdata = lpfc_rport_data_from_scsi_device(cmnd->device); 4541 err = fc_remote_port_chkready(rport); 4542 if (err) { 4543 cmnd->result = err; 4544 goto out_fail_command; 4545 } 4546 ndlp = rdata->pnode; 4547 4548 if ((scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) && 4549 (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED))) { 4550 4551 lpfc_printf_log(phba, KERN_ERR, LOG_BG, 4552 "9058 BLKGRD: ERROR: rcvd protected cmd:%02x" 4553 " op:%02x str=%s without registering for" 4554 " BlockGuard - Rejecting command\n", 4555 cmnd->cmnd[0], scsi_get_prot_op(cmnd), 4556 dif_op_str[scsi_get_prot_op(cmnd)]); 4557 goto out_fail_command; 4558 } 4559 4560 /* 4561 * Catch race where our node has transitioned, but the 4562 * transport is still transitioning. 4563 */ 4564 if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) 4565 goto out_tgt_busy; 4566 if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth) 4567 goto out_tgt_busy; 4568 4569 lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp); 4570 if (lpfc_cmd == NULL) { 4571 lpfc_rampdown_queue_depth(phba); 4572 4573 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_ERROR, 4574 "0707 driver's buffer pool is empty, " 4575 "IO busied\n"); 4576 goto out_host_busy; 4577 } 4578 4579 /* 4580 * Store the midlayer's command structure for the completion phase 4581 * and complete the command initialization. 4582 */ 4583 lpfc_cmd->pCmd = cmnd; 4584 lpfc_cmd->rdata = rdata; 4585 lpfc_cmd->timeout = 0; 4586 lpfc_cmd->start_time = jiffies; 4587 cmnd->host_scribble = (unsigned char *)lpfc_cmd; 4588 4589 if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) { 4590 if (vport->phba->cfg_enable_bg) { 4591 lpfc_printf_vlog(vport, 4592 KERN_INFO, LOG_SCSI_CMD, 4593 "9033 BLKGRD: rcvd %s cmd:x%x " 4594 "sector x%llx cnt %u pt %x\n", 4595 dif_op_str[scsi_get_prot_op(cmnd)], 4596 cmnd->cmnd[0], 4597 (unsigned long long)scsi_get_lba(cmnd), 4598 blk_rq_sectors(cmnd->request), 4599 (cmnd->cmnd[1]>>5)); 4600 } 4601 err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd); 4602 } else { 4603 if (vport->phba->cfg_enable_bg) { 4604 lpfc_printf_vlog(vport, 4605 KERN_INFO, LOG_SCSI_CMD, 4606 "9038 BLKGRD: rcvd PROT_NORMAL cmd: " 4607 "x%x sector x%llx cnt %u pt %x\n", 4608 cmnd->cmnd[0], 4609 (unsigned long long)scsi_get_lba(cmnd), 4610 blk_rq_sectors(cmnd->request), 4611 (cmnd->cmnd[1]>>5)); 4612 } 4613 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd); 4614 } 4615 4616 if (err) 4617 goto out_host_busy_free_buf; 4618 4619 lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp); 4620 4621 atomic_inc(&ndlp->cmd_pending); 4622 err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, 4623 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB); 4624 if (err) { 4625 atomic_dec(&ndlp->cmd_pending); 4626 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 4627 "3376 FCP could not issue IOCB err %x" 4628 "FCP cmd x%x <%d/%llu> " 4629 "sid: x%x did: x%x oxid: x%x " 4630 "Data: x%x x%x x%x x%x\n", 4631 err, cmnd->cmnd[0], 4632 cmnd->device ? cmnd->device->id : 0xffff, 4633 cmnd->device ? cmnd->device->lun : (u64) -1, 4634 vport->fc_myDID, ndlp->nlp_DID, 4635 phba->sli_rev == LPFC_SLI_REV4 ? 4636 lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff, 4637 lpfc_cmd->cur_iocbq.iocb.ulpContext, 4638 lpfc_cmd->cur_iocbq.iocb.ulpIoTag, 4639 lpfc_cmd->cur_iocbq.iocb.ulpTimeout, 4640 (uint32_t) 4641 (cmnd->request->timeout / 1000)); 4642 4643 4644 goto out_host_busy_free_buf; 4645 } 4646 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 4647 lpfc_sli_handle_fast_ring_event(phba, 4648 &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ); 4649 4650 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 4651 lpfc_poll_rearm_timer(phba); 4652 } 4653 4654 return 0; 4655 4656 out_host_busy_free_buf: 4657 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd); 4658 lpfc_release_scsi_buf(phba, lpfc_cmd); 4659 out_host_busy: 4660 return SCSI_MLQUEUE_HOST_BUSY; 4661 4662 out_tgt_busy: 4663 return SCSI_MLQUEUE_TARGET_BUSY; 4664 4665 out_fail_command: 4666 cmnd->scsi_done(cmnd); 4667 return 0; 4668 } 4669 4670 4671 /** 4672 * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point 4673 * @cmnd: Pointer to scsi_cmnd data structure. 4674 * 4675 * This routine aborts @cmnd pending in base driver. 4676 * 4677 * Return code : 4678 * 0x2003 - Error 4679 * 0x2002 - Success 4680 **/ 4681 static int 4682 lpfc_abort_handler(struct scsi_cmnd *cmnd) 4683 { 4684 struct Scsi_Host *shost = cmnd->device->host; 4685 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 4686 struct lpfc_hba *phba = vport->phba; 4687 struct lpfc_iocbq *iocb; 4688 struct lpfc_iocbq *abtsiocb; 4689 struct lpfc_scsi_buf *lpfc_cmd; 4690 IOCB_t *cmd, *icmd; 4691 int ret = SUCCESS, status = 0; 4692 struct lpfc_sli_ring *pring_s4; 4693 int ret_val; 4694 unsigned long flags, iflags; 4695 DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq); 4696 4697 status = fc_block_scsi_eh(cmnd); 4698 if (status != 0 && status != SUCCESS) 4699 return status; 4700 4701 spin_lock_irqsave(&phba->hbalock, flags); 4702 /* driver queued commands are in process of being flushed */ 4703 if (phba->hba_flag & HBA_FCP_IOQ_FLUSH) { 4704 spin_unlock_irqrestore(&phba->hbalock, flags); 4705 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4706 "3168 SCSI Layer abort requested I/O has been " 4707 "flushed by LLD.\n"); 4708 return FAILED; 4709 } 4710 4711 lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble; 4712 if (!lpfc_cmd || !lpfc_cmd->pCmd) { 4713 spin_unlock_irqrestore(&phba->hbalock, flags); 4714 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4715 "2873 SCSI Layer I/O Abort Request IO CMPL Status " 4716 "x%x ID %d LUN %llu\n", 4717 SUCCESS, cmnd->device->id, cmnd->device->lun); 4718 return SUCCESS; 4719 } 4720 4721 iocb = &lpfc_cmd->cur_iocbq; 4722 /* the command is in process of being cancelled */ 4723 if (!(iocb->iocb_flag & LPFC_IO_ON_TXCMPLQ)) { 4724 spin_unlock_irqrestore(&phba->hbalock, flags); 4725 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4726 "3169 SCSI Layer abort requested I/O has been " 4727 "cancelled by LLD.\n"); 4728 return FAILED; 4729 } 4730 /* 4731 * If pCmd field of the corresponding lpfc_scsi_buf structure 4732 * points to a different SCSI command, then the driver has 4733 * already completed this command, but the midlayer did not 4734 * see the completion before the eh fired. Just return SUCCESS. 4735 */ 4736 if (lpfc_cmd->pCmd != cmnd) { 4737 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4738 "3170 SCSI Layer abort requested I/O has been " 4739 "completed by LLD.\n"); 4740 goto out_unlock; 4741 } 4742 4743 BUG_ON(iocb->context1 != lpfc_cmd); 4744 4745 /* abort issued in recovery is still in progress */ 4746 if (iocb->iocb_flag & LPFC_DRIVER_ABORTED) { 4747 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4748 "3389 SCSI Layer I/O Abort Request is pending\n"); 4749 spin_unlock_irqrestore(&phba->hbalock, flags); 4750 goto wait_for_cmpl; 4751 } 4752 4753 abtsiocb = __lpfc_sli_get_iocbq(phba); 4754 if (abtsiocb == NULL) { 4755 ret = FAILED; 4756 goto out_unlock; 4757 } 4758 4759 /* Indicate the IO is being aborted by the driver. */ 4760 iocb->iocb_flag |= LPFC_DRIVER_ABORTED; 4761 4762 /* 4763 * The scsi command can not be in txq and it is in flight because the 4764 * pCmd is still pointig at the SCSI command we have to abort. There 4765 * is no need to search the txcmplq. Just send an abort to the FW. 4766 */ 4767 4768 cmd = &iocb->iocb; 4769 icmd = &abtsiocb->iocb; 4770 icmd->un.acxri.abortType = ABORT_TYPE_ABTS; 4771 icmd->un.acxri.abortContextTag = cmd->ulpContext; 4772 if (phba->sli_rev == LPFC_SLI_REV4) 4773 icmd->un.acxri.abortIoTag = iocb->sli4_xritag; 4774 else 4775 icmd->un.acxri.abortIoTag = cmd->ulpIoTag; 4776 4777 icmd->ulpLe = 1; 4778 icmd->ulpClass = cmd->ulpClass; 4779 4780 /* ABTS WQE must go to the same WQ as the WQE to be aborted */ 4781 abtsiocb->hba_wqidx = iocb->hba_wqidx; 4782 abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX; 4783 if (iocb->iocb_flag & LPFC_IO_FOF) 4784 abtsiocb->iocb_flag |= LPFC_IO_FOF; 4785 4786 if (lpfc_is_link_up(phba)) 4787 icmd->ulpCommand = CMD_ABORT_XRI_CN; 4788 else 4789 icmd->ulpCommand = CMD_CLOSE_XRI_CN; 4790 4791 abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl; 4792 abtsiocb->vport = vport; 4793 if (phba->sli_rev == LPFC_SLI_REV4) { 4794 pring_s4 = lpfc_sli4_calc_ring(phba, iocb); 4795 if (pring_s4 == NULL) { 4796 ret = FAILED; 4797 goto out_unlock; 4798 } 4799 /* Note: both hbalock and ring_lock must be set here */ 4800 spin_lock_irqsave(&pring_s4->ring_lock, iflags); 4801 ret_val = __lpfc_sli_issue_iocb(phba, pring_s4->ringno, 4802 abtsiocb, 0); 4803 spin_unlock_irqrestore(&pring_s4->ring_lock, iflags); 4804 } else { 4805 ret_val = __lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, 4806 abtsiocb, 0); 4807 } 4808 /* no longer need the lock after this point */ 4809 spin_unlock_irqrestore(&phba->hbalock, flags); 4810 4811 4812 if (ret_val == IOCB_ERROR) { 4813 lpfc_sli_release_iocbq(phba, abtsiocb); 4814 ret = FAILED; 4815 goto out; 4816 } 4817 4818 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 4819 lpfc_sli_handle_fast_ring_event(phba, 4820 &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ); 4821 4822 wait_for_cmpl: 4823 lpfc_cmd->waitq = &waitq; 4824 /* Wait for abort to complete */ 4825 wait_event_timeout(waitq, 4826 (lpfc_cmd->pCmd != cmnd), 4827 msecs_to_jiffies(2*vport->cfg_devloss_tmo*1000)); 4828 4829 spin_lock_irqsave(shost->host_lock, flags); 4830 lpfc_cmd->waitq = NULL; 4831 spin_unlock_irqrestore(shost->host_lock, flags); 4832 4833 if (lpfc_cmd->pCmd == cmnd) { 4834 ret = FAILED; 4835 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 4836 "0748 abort handler timed out waiting " 4837 "for aborting I/O (xri:x%x) to complete: " 4838 "ret %#x, ID %d, LUN %llu\n", 4839 iocb->sli4_xritag, ret, 4840 cmnd->device->id, cmnd->device->lun); 4841 } 4842 goto out; 4843 4844 out_unlock: 4845 spin_unlock_irqrestore(&phba->hbalock, flags); 4846 out: 4847 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 4848 "0749 SCSI Layer I/O Abort Request Status x%x ID %d " 4849 "LUN %llu\n", ret, cmnd->device->id, 4850 cmnd->device->lun); 4851 return ret; 4852 } 4853 4854 static char * 4855 lpfc_taskmgmt_name(uint8_t task_mgmt_cmd) 4856 { 4857 switch (task_mgmt_cmd) { 4858 case FCP_ABORT_TASK_SET: 4859 return "ABORT_TASK_SET"; 4860 case FCP_CLEAR_TASK_SET: 4861 return "FCP_CLEAR_TASK_SET"; 4862 case FCP_BUS_RESET: 4863 return "FCP_BUS_RESET"; 4864 case FCP_LUN_RESET: 4865 return "FCP_LUN_RESET"; 4866 case FCP_TARGET_RESET: 4867 return "FCP_TARGET_RESET"; 4868 case FCP_CLEAR_ACA: 4869 return "FCP_CLEAR_ACA"; 4870 case FCP_TERMINATE_TASK: 4871 return "FCP_TERMINATE_TASK"; 4872 default: 4873 return "unknown"; 4874 } 4875 } 4876 4877 4878 /** 4879 * lpfc_check_fcp_rsp - check the returned fcp_rsp to see if task failed 4880 * @vport: The virtual port for which this call is being executed. 4881 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure. 4882 * 4883 * This routine checks the FCP RSP INFO to see if the tsk mgmt command succeded 4884 * 4885 * Return code : 4886 * 0x2003 - Error 4887 * 0x2002 - Success 4888 **/ 4889 static int 4890 lpfc_check_fcp_rsp(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd) 4891 { 4892 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp; 4893 uint32_t rsp_info; 4894 uint32_t rsp_len; 4895 uint8_t rsp_info_code; 4896 int ret = FAILED; 4897 4898 4899 if (fcprsp == NULL) 4900 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 4901 "0703 fcp_rsp is missing\n"); 4902 else { 4903 rsp_info = fcprsp->rspStatus2; 4904 rsp_len = be32_to_cpu(fcprsp->rspRspLen); 4905 rsp_info_code = fcprsp->rspInfo3; 4906 4907 4908 lpfc_printf_vlog(vport, KERN_INFO, 4909 LOG_FCP, 4910 "0706 fcp_rsp valid 0x%x," 4911 " rsp len=%d code 0x%x\n", 4912 rsp_info, 4913 rsp_len, rsp_info_code); 4914 4915 if ((fcprsp->rspStatus2&RSP_LEN_VALID) && (rsp_len == 8)) { 4916 switch (rsp_info_code) { 4917 case RSP_NO_FAILURE: 4918 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 4919 "0715 Task Mgmt No Failure\n"); 4920 ret = SUCCESS; 4921 break; 4922 case RSP_TM_NOT_SUPPORTED: /* TM rejected */ 4923 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 4924 "0716 Task Mgmt Target " 4925 "reject\n"); 4926 break; 4927 case RSP_TM_NOT_COMPLETED: /* TM failed */ 4928 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 4929 "0717 Task Mgmt Target " 4930 "failed TM\n"); 4931 break; 4932 case RSP_TM_INVALID_LU: /* TM to invalid LU! */ 4933 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 4934 "0718 Task Mgmt to invalid " 4935 "LUN\n"); 4936 break; 4937 } 4938 } 4939 } 4940 return ret; 4941 } 4942 4943 4944 /** 4945 * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler 4946 * @vport: The virtual port for which this call is being executed. 4947 * @rdata: Pointer to remote port local data 4948 * @tgt_id: Target ID of remote device. 4949 * @lun_id: Lun number for the TMF 4950 * @task_mgmt_cmd: type of TMF to send 4951 * 4952 * This routine builds and sends a TMF (SCSI Task Mgmt Function) to 4953 * a remote port. 4954 * 4955 * Return Code: 4956 * 0x2003 - Error 4957 * 0x2002 - Success. 4958 **/ 4959 static int 4960 lpfc_send_taskmgmt(struct lpfc_vport *vport, struct scsi_cmnd *cmnd, 4961 unsigned int tgt_id, uint64_t lun_id, 4962 uint8_t task_mgmt_cmd) 4963 { 4964 struct lpfc_hba *phba = vport->phba; 4965 struct lpfc_scsi_buf *lpfc_cmd; 4966 struct lpfc_iocbq *iocbq; 4967 struct lpfc_iocbq *iocbqrsp; 4968 struct lpfc_rport_data *rdata; 4969 struct lpfc_nodelist *pnode; 4970 int ret; 4971 int status; 4972 4973 rdata = lpfc_rport_data_from_scsi_device(cmnd->device); 4974 if (!rdata || !rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode)) 4975 return FAILED; 4976 pnode = rdata->pnode; 4977 4978 lpfc_cmd = lpfc_get_scsi_buf(phba, pnode); 4979 if (lpfc_cmd == NULL) 4980 return FAILED; 4981 lpfc_cmd->timeout = phba->cfg_task_mgmt_tmo; 4982 lpfc_cmd->rdata = rdata; 4983 lpfc_cmd->pCmd = cmnd; 4984 4985 status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id, 4986 task_mgmt_cmd); 4987 if (!status) { 4988 lpfc_release_scsi_buf(phba, lpfc_cmd); 4989 return FAILED; 4990 } 4991 4992 iocbq = &lpfc_cmd->cur_iocbq; 4993 iocbqrsp = lpfc_sli_get_iocbq(phba); 4994 if (iocbqrsp == NULL) { 4995 lpfc_release_scsi_buf(phba, lpfc_cmd); 4996 return FAILED; 4997 } 4998 iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl; 4999 5000 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 5001 "0702 Issue %s to TGT %d LUN %llu " 5002 "rpi x%x nlp_flag x%x Data: x%x x%x\n", 5003 lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id, 5004 pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag, 5005 iocbq->iocb_flag); 5006 5007 status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING, 5008 iocbq, iocbqrsp, lpfc_cmd->timeout); 5009 if ((status != IOCB_SUCCESS) || 5010 (iocbqrsp->iocb.ulpStatus != IOSTAT_SUCCESS)) { 5011 if (status != IOCB_SUCCESS || 5012 iocbqrsp->iocb.ulpStatus != IOSTAT_FCP_RSP_ERROR) 5013 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5014 "0727 TMF %s to TGT %d LUN %llu " 5015 "failed (%d, %d) iocb_flag x%x\n", 5016 lpfc_taskmgmt_name(task_mgmt_cmd), 5017 tgt_id, lun_id, 5018 iocbqrsp->iocb.ulpStatus, 5019 iocbqrsp->iocb.un.ulpWord[4], 5020 iocbq->iocb_flag); 5021 /* if ulpStatus != IOCB_SUCCESS, then status == IOCB_SUCCESS */ 5022 if (status == IOCB_SUCCESS) { 5023 if (iocbqrsp->iocb.ulpStatus == IOSTAT_FCP_RSP_ERROR) 5024 /* Something in the FCP_RSP was invalid. 5025 * Check conditions */ 5026 ret = lpfc_check_fcp_rsp(vport, lpfc_cmd); 5027 else 5028 ret = FAILED; 5029 } else if (status == IOCB_TIMEDOUT) { 5030 ret = TIMEOUT_ERROR; 5031 } else { 5032 ret = FAILED; 5033 } 5034 } else 5035 ret = SUCCESS; 5036 5037 lpfc_sli_release_iocbq(phba, iocbqrsp); 5038 5039 if (ret != TIMEOUT_ERROR) 5040 lpfc_release_scsi_buf(phba, lpfc_cmd); 5041 5042 return ret; 5043 } 5044 5045 /** 5046 * lpfc_chk_tgt_mapped - 5047 * @vport: The virtual port to check on 5048 * @cmnd: Pointer to scsi_cmnd data structure. 5049 * 5050 * This routine delays until the scsi target (aka rport) for the 5051 * command exists (is present and logged in) or we declare it non-existent. 5052 * 5053 * Return code : 5054 * 0x2003 - Error 5055 * 0x2002 - Success 5056 **/ 5057 static int 5058 lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd) 5059 { 5060 struct lpfc_rport_data *rdata; 5061 struct lpfc_nodelist *pnode; 5062 unsigned long later; 5063 5064 rdata = lpfc_rport_data_from_scsi_device(cmnd->device); 5065 if (!rdata) { 5066 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, 5067 "0797 Tgt Map rport failure: rdata x%p\n", rdata); 5068 return FAILED; 5069 } 5070 pnode = rdata->pnode; 5071 /* 5072 * If target is not in a MAPPED state, delay until 5073 * target is rediscovered or devloss timeout expires. 5074 */ 5075 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; 5076 while (time_after(later, jiffies)) { 5077 if (!pnode || !NLP_CHK_NODE_ACT(pnode)) 5078 return FAILED; 5079 if (pnode->nlp_state == NLP_STE_MAPPED_NODE) 5080 return SUCCESS; 5081 schedule_timeout_uninterruptible(msecs_to_jiffies(500)); 5082 rdata = lpfc_rport_data_from_scsi_device(cmnd->device); 5083 if (!rdata) 5084 return FAILED; 5085 pnode = rdata->pnode; 5086 } 5087 if (!pnode || !NLP_CHK_NODE_ACT(pnode) || 5088 (pnode->nlp_state != NLP_STE_MAPPED_NODE)) 5089 return FAILED; 5090 return SUCCESS; 5091 } 5092 5093 /** 5094 * lpfc_reset_flush_io_context - 5095 * @vport: The virtual port (scsi_host) for the flush context 5096 * @tgt_id: If aborting by Target contect - specifies the target id 5097 * @lun_id: If aborting by Lun context - specifies the lun id 5098 * @context: specifies the context level to flush at. 5099 * 5100 * After a reset condition via TMF, we need to flush orphaned i/o 5101 * contexts from the adapter. This routine aborts any contexts 5102 * outstanding, then waits for their completions. The wait is 5103 * bounded by devloss_tmo though. 5104 * 5105 * Return code : 5106 * 0x2003 - Error 5107 * 0x2002 - Success 5108 **/ 5109 static int 5110 lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id, 5111 uint64_t lun_id, lpfc_ctx_cmd context) 5112 { 5113 struct lpfc_hba *phba = vport->phba; 5114 unsigned long later; 5115 int cnt; 5116 5117 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context); 5118 if (cnt) 5119 lpfc_sli_abort_taskmgmt(vport, 5120 &phba->sli.sli3_ring[LPFC_FCP_RING], 5121 tgt_id, lun_id, context); 5122 later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; 5123 while (time_after(later, jiffies) && cnt) { 5124 schedule_timeout_uninterruptible(msecs_to_jiffies(20)); 5125 cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context); 5126 } 5127 if (cnt) { 5128 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5129 "0724 I/O flush failure for context %s : cnt x%x\n", 5130 ((context == LPFC_CTX_LUN) ? "LUN" : 5131 ((context == LPFC_CTX_TGT) ? "TGT" : 5132 ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))), 5133 cnt); 5134 return FAILED; 5135 } 5136 return SUCCESS; 5137 } 5138 5139 /** 5140 * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point 5141 * @cmnd: Pointer to scsi_cmnd data structure. 5142 * 5143 * This routine does a device reset by sending a LUN_RESET task management 5144 * command. 5145 * 5146 * Return code : 5147 * 0x2003 - Error 5148 * 0x2002 - Success 5149 **/ 5150 static int 5151 lpfc_device_reset_handler(struct scsi_cmnd *cmnd) 5152 { 5153 struct Scsi_Host *shost = cmnd->device->host; 5154 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 5155 struct lpfc_rport_data *rdata; 5156 struct lpfc_nodelist *pnode; 5157 unsigned tgt_id = cmnd->device->id; 5158 uint64_t lun_id = cmnd->device->lun; 5159 struct lpfc_scsi_event_header scsi_event; 5160 int status; 5161 5162 rdata = lpfc_rport_data_from_scsi_device(cmnd->device); 5163 if (!rdata || !rdata->pnode) { 5164 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5165 "0798 Device Reset rport failure: rdata x%p\n", 5166 rdata); 5167 return FAILED; 5168 } 5169 pnode = rdata->pnode; 5170 status = fc_block_scsi_eh(cmnd); 5171 if (status != 0 && status != SUCCESS) 5172 return status; 5173 5174 status = lpfc_chk_tgt_mapped(vport, cmnd); 5175 if (status == FAILED) { 5176 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5177 "0721 Device Reset rport failure: rdata x%p\n", rdata); 5178 return FAILED; 5179 } 5180 5181 scsi_event.event_type = FC_REG_SCSI_EVENT; 5182 scsi_event.subcategory = LPFC_EVENT_LUNRESET; 5183 scsi_event.lun = lun_id; 5184 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name)); 5185 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name)); 5186 5187 fc_host_post_vendor_event(shost, fc_get_event_number(), 5188 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID); 5189 5190 status = lpfc_send_taskmgmt(vport, cmnd, tgt_id, lun_id, 5191 FCP_LUN_RESET); 5192 5193 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5194 "0713 SCSI layer issued Device Reset (%d, %llu) " 5195 "return x%x\n", tgt_id, lun_id, status); 5196 5197 /* 5198 * We have to clean up i/o as : they may be orphaned by the TMF; 5199 * or if the TMF failed, they may be in an indeterminate state. 5200 * So, continue on. 5201 * We will report success if all the i/o aborts successfully. 5202 */ 5203 if (status == SUCCESS) 5204 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id, 5205 LPFC_CTX_LUN); 5206 5207 return status; 5208 } 5209 5210 /** 5211 * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point 5212 * @cmnd: Pointer to scsi_cmnd data structure. 5213 * 5214 * This routine does a target reset by sending a TARGET_RESET task management 5215 * command. 5216 * 5217 * Return code : 5218 * 0x2003 - Error 5219 * 0x2002 - Success 5220 **/ 5221 static int 5222 lpfc_target_reset_handler(struct scsi_cmnd *cmnd) 5223 { 5224 struct Scsi_Host *shost = cmnd->device->host; 5225 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 5226 struct lpfc_rport_data *rdata; 5227 struct lpfc_nodelist *pnode; 5228 unsigned tgt_id = cmnd->device->id; 5229 uint64_t lun_id = cmnd->device->lun; 5230 struct lpfc_scsi_event_header scsi_event; 5231 int status; 5232 5233 rdata = lpfc_rport_data_from_scsi_device(cmnd->device); 5234 if (!rdata) { 5235 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5236 "0799 Target Reset rport failure: rdata x%p\n", rdata); 5237 return FAILED; 5238 } 5239 pnode = rdata->pnode; 5240 status = fc_block_scsi_eh(cmnd); 5241 if (status != 0 && status != SUCCESS) 5242 return status; 5243 5244 status = lpfc_chk_tgt_mapped(vport, cmnd); 5245 if (status == FAILED) { 5246 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5247 "0722 Target Reset rport failure: rdata x%p\n", rdata); 5248 if (pnode) { 5249 spin_lock_irq(shost->host_lock); 5250 pnode->nlp_flag &= ~NLP_NPR_ADISC; 5251 pnode->nlp_fcp_info &= ~NLP_FCP_2_DEVICE; 5252 spin_unlock_irq(shost->host_lock); 5253 } 5254 lpfc_reset_flush_io_context(vport, tgt_id, lun_id, 5255 LPFC_CTX_TGT); 5256 return FAST_IO_FAIL; 5257 } 5258 5259 scsi_event.event_type = FC_REG_SCSI_EVENT; 5260 scsi_event.subcategory = LPFC_EVENT_TGTRESET; 5261 scsi_event.lun = 0; 5262 memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name)); 5263 memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name)); 5264 5265 fc_host_post_vendor_event(shost, fc_get_event_number(), 5266 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID); 5267 5268 status = lpfc_send_taskmgmt(vport, cmnd, tgt_id, lun_id, 5269 FCP_TARGET_RESET); 5270 5271 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5272 "0723 SCSI layer issued Target Reset (%d, %llu) " 5273 "return x%x\n", tgt_id, lun_id, status); 5274 5275 /* 5276 * We have to clean up i/o as : they may be orphaned by the TMF; 5277 * or if the TMF failed, they may be in an indeterminate state. 5278 * So, continue on. 5279 * We will report success if all the i/o aborts successfully. 5280 */ 5281 if (status == SUCCESS) 5282 status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id, 5283 LPFC_CTX_TGT); 5284 return status; 5285 } 5286 5287 /** 5288 * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point 5289 * @cmnd: Pointer to scsi_cmnd data structure. 5290 * 5291 * This routine does target reset to all targets on @cmnd->device->host. 5292 * This emulates Parallel SCSI Bus Reset Semantics. 5293 * 5294 * Return code : 5295 * 0x2003 - Error 5296 * 0x2002 - Success 5297 **/ 5298 static int 5299 lpfc_bus_reset_handler(struct scsi_cmnd *cmnd) 5300 { 5301 struct Scsi_Host *shost = cmnd->device->host; 5302 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 5303 struct lpfc_nodelist *ndlp = NULL; 5304 struct lpfc_scsi_event_header scsi_event; 5305 int match; 5306 int ret = SUCCESS, status, i; 5307 5308 scsi_event.event_type = FC_REG_SCSI_EVENT; 5309 scsi_event.subcategory = LPFC_EVENT_BUSRESET; 5310 scsi_event.lun = 0; 5311 memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name)); 5312 memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name)); 5313 5314 fc_host_post_vendor_event(shost, fc_get_event_number(), 5315 sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID); 5316 5317 status = fc_block_scsi_eh(cmnd); 5318 if (status != 0 && status != SUCCESS) 5319 return status; 5320 5321 /* 5322 * Since the driver manages a single bus device, reset all 5323 * targets known to the driver. Should any target reset 5324 * fail, this routine returns failure to the midlayer. 5325 */ 5326 for (i = 0; i < LPFC_MAX_TARGET; i++) { 5327 /* Search for mapped node by target ID */ 5328 match = 0; 5329 spin_lock_irq(shost->host_lock); 5330 list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) { 5331 if (!NLP_CHK_NODE_ACT(ndlp)) 5332 continue; 5333 if (vport->phba->cfg_fcp2_no_tgt_reset && 5334 (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE)) 5335 continue; 5336 if (ndlp->nlp_state == NLP_STE_MAPPED_NODE && 5337 ndlp->nlp_sid == i && 5338 ndlp->rport && 5339 ndlp->nlp_type & NLP_FCP_TARGET) { 5340 match = 1; 5341 break; 5342 } 5343 } 5344 spin_unlock_irq(shost->host_lock); 5345 if (!match) 5346 continue; 5347 5348 status = lpfc_send_taskmgmt(vport, cmnd, 5349 i, 0, FCP_TARGET_RESET); 5350 5351 if (status != SUCCESS) { 5352 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5353 "0700 Bus Reset on target %d failed\n", 5354 i); 5355 ret = FAILED; 5356 } 5357 } 5358 /* 5359 * We have to clean up i/o as : they may be orphaned by the TMFs 5360 * above; or if any of the TMFs failed, they may be in an 5361 * indeterminate state. 5362 * We will report success if all the i/o aborts successfully. 5363 */ 5364 5365 status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST); 5366 if (status != SUCCESS) 5367 ret = FAILED; 5368 5369 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5370 "0714 SCSI layer issued Bus Reset Data: x%x\n", ret); 5371 return ret; 5372 } 5373 5374 /** 5375 * lpfc_host_reset_handler - scsi_host_template eh_host_reset_handler entry pt 5376 * @cmnd: Pointer to scsi_cmnd data structure. 5377 * 5378 * This routine does host reset to the adaptor port. It brings the HBA 5379 * offline, performs a board restart, and then brings the board back online. 5380 * The lpfc_offline calls lpfc_sli_hba_down which will abort and local 5381 * reject all outstanding SCSI commands to the host and error returned 5382 * back to SCSI mid-level. As this will be SCSI mid-level's last resort 5383 * of error handling, it will only return error if resetting of the adapter 5384 * is not successful; in all other cases, will return success. 5385 * 5386 * Return code : 5387 * 0x2003 - Error 5388 * 0x2002 - Success 5389 **/ 5390 static int 5391 lpfc_host_reset_handler(struct scsi_cmnd *cmnd) 5392 { 5393 struct Scsi_Host *shost = cmnd->device->host; 5394 struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; 5395 struct lpfc_hba *phba = vport->phba; 5396 int rc, ret = SUCCESS; 5397 5398 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5399 "3172 SCSI layer issued Host Reset Data:\n"); 5400 5401 lpfc_offline_prep(phba, LPFC_MBX_WAIT); 5402 lpfc_offline(phba); 5403 rc = lpfc_sli_brdrestart(phba); 5404 if (rc) 5405 ret = FAILED; 5406 rc = lpfc_online(phba); 5407 if (rc) 5408 ret = FAILED; 5409 lpfc_unblock_mgmt_io(phba); 5410 5411 if (ret == FAILED) { 5412 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5413 "3323 Failed host reset, bring it offline\n"); 5414 lpfc_sli4_offline_eratt(phba); 5415 } 5416 return ret; 5417 } 5418 5419 /** 5420 * lpfc_slave_alloc - scsi_host_template slave_alloc entry point 5421 * @sdev: Pointer to scsi_device. 5422 * 5423 * This routine populates the cmds_per_lun count + 2 scsi_bufs into this host's 5424 * globally available list of scsi buffers. This routine also makes sure scsi 5425 * buffer is not allocated more than HBA limit conveyed to midlayer. This list 5426 * of scsi buffer exists for the lifetime of the driver. 5427 * 5428 * Return codes: 5429 * non-0 - Error 5430 * 0 - Success 5431 **/ 5432 static int 5433 lpfc_slave_alloc(struct scsi_device *sdev) 5434 { 5435 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 5436 struct lpfc_hba *phba = vport->phba; 5437 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 5438 uint32_t total = 0; 5439 uint32_t num_to_alloc = 0; 5440 int num_allocated = 0; 5441 uint32_t sdev_cnt; 5442 struct lpfc_device_data *device_data; 5443 unsigned long flags; 5444 struct lpfc_name target_wwpn; 5445 5446 if (!rport || fc_remote_port_chkready(rport)) 5447 return -ENXIO; 5448 5449 if (phba->cfg_fof) { 5450 5451 /* 5452 * Check to see if the device data structure for the lun 5453 * exists. If not, create one. 5454 */ 5455 5456 u64_to_wwn(rport->port_name, target_wwpn.u.wwn); 5457 spin_lock_irqsave(&phba->devicelock, flags); 5458 device_data = __lpfc_get_device_data(phba, 5459 &phba->luns, 5460 &vport->fc_portname, 5461 &target_wwpn, 5462 sdev->lun); 5463 if (!device_data) { 5464 spin_unlock_irqrestore(&phba->devicelock, flags); 5465 device_data = lpfc_create_device_data(phba, 5466 &vport->fc_portname, 5467 &target_wwpn, 5468 sdev->lun, 5469 phba->cfg_XLanePriority, 5470 true); 5471 if (!device_data) 5472 return -ENOMEM; 5473 spin_lock_irqsave(&phba->devicelock, flags); 5474 list_add_tail(&device_data->listentry, &phba->luns); 5475 } 5476 device_data->rport_data = rport->dd_data; 5477 device_data->available = true; 5478 spin_unlock_irqrestore(&phba->devicelock, flags); 5479 sdev->hostdata = device_data; 5480 } else { 5481 sdev->hostdata = rport->dd_data; 5482 } 5483 sdev_cnt = atomic_inc_return(&phba->sdev_cnt); 5484 5485 /* 5486 * Populate the cmds_per_lun count scsi_bufs into this host's globally 5487 * available list of scsi buffers. Don't allocate more than the 5488 * HBA limit conveyed to the midlayer via the host structure. The 5489 * formula accounts for the lun_queue_depth + error handlers + 1 5490 * extra. This list of scsi bufs exists for the lifetime of the driver. 5491 */ 5492 total = phba->total_scsi_bufs; 5493 num_to_alloc = vport->cfg_lun_queue_depth + 2; 5494 5495 /* If allocated buffers are enough do nothing */ 5496 if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total) 5497 return 0; 5498 5499 /* Allow some exchanges to be available always to complete discovery */ 5500 if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) { 5501 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 5502 "0704 At limitation of %d preallocated " 5503 "command buffers\n", total); 5504 return 0; 5505 /* Allow some exchanges to be available always to complete discovery */ 5506 } else if (total + num_to_alloc > 5507 phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) { 5508 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, 5509 "0705 Allocation request of %d " 5510 "command buffers will exceed max of %d. " 5511 "Reducing allocation request to %d.\n", 5512 num_to_alloc, phba->cfg_hba_queue_depth, 5513 (phba->cfg_hba_queue_depth - total)); 5514 num_to_alloc = phba->cfg_hba_queue_depth - total; 5515 } 5516 num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc); 5517 if (num_to_alloc != num_allocated) { 5518 lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, 5519 "0708 Allocation request of %d " 5520 "command buffers did not succeed. " 5521 "Allocated %d buffers.\n", 5522 num_to_alloc, num_allocated); 5523 } 5524 if (num_allocated > 0) 5525 phba->total_scsi_bufs += num_allocated; 5526 return 0; 5527 } 5528 5529 /** 5530 * lpfc_slave_configure - scsi_host_template slave_configure entry point 5531 * @sdev: Pointer to scsi_device. 5532 * 5533 * This routine configures following items 5534 * - Tag command queuing support for @sdev if supported. 5535 * - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set. 5536 * 5537 * Return codes: 5538 * 0 - Success 5539 **/ 5540 static int 5541 lpfc_slave_configure(struct scsi_device *sdev) 5542 { 5543 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 5544 struct lpfc_hba *phba = vport->phba; 5545 5546 scsi_change_queue_depth(sdev, vport->cfg_lun_queue_depth); 5547 5548 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { 5549 lpfc_sli_handle_fast_ring_event(phba, 5550 &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ); 5551 if (phba->cfg_poll & DISABLE_FCP_RING_INT) 5552 lpfc_poll_rearm_timer(phba); 5553 } 5554 5555 return 0; 5556 } 5557 5558 /** 5559 * lpfc_slave_destroy - slave_destroy entry point of SHT data structure 5560 * @sdev: Pointer to scsi_device. 5561 * 5562 * This routine sets @sdev hostatdata filed to null. 5563 **/ 5564 static void 5565 lpfc_slave_destroy(struct scsi_device *sdev) 5566 { 5567 struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; 5568 struct lpfc_hba *phba = vport->phba; 5569 unsigned long flags; 5570 struct lpfc_device_data *device_data = sdev->hostdata; 5571 5572 atomic_dec(&phba->sdev_cnt); 5573 if ((phba->cfg_fof) && (device_data)) { 5574 spin_lock_irqsave(&phba->devicelock, flags); 5575 device_data->available = false; 5576 if (!device_data->oas_enabled) 5577 lpfc_delete_device_data(phba, device_data); 5578 spin_unlock_irqrestore(&phba->devicelock, flags); 5579 } 5580 sdev->hostdata = NULL; 5581 return; 5582 } 5583 5584 /** 5585 * lpfc_create_device_data - creates and initializes device data structure for OAS 5586 * @pha: Pointer to host bus adapter structure. 5587 * @vport_wwpn: Pointer to vport's wwpn information 5588 * @target_wwpn: Pointer to target's wwpn information 5589 * @lun: Lun on target 5590 * @atomic_create: Flag to indicate if memory should be allocated using the 5591 * GFP_ATOMIC flag or not. 5592 * 5593 * This routine creates a device data structure which will contain identifying 5594 * information for the device (host wwpn, target wwpn, lun), state of OAS, 5595 * whether or not the corresponding lun is available by the system, 5596 * and pointer to the rport data. 5597 * 5598 * Return codes: 5599 * NULL - Error 5600 * Pointer to lpfc_device_data - Success 5601 **/ 5602 struct lpfc_device_data* 5603 lpfc_create_device_data(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn, 5604 struct lpfc_name *target_wwpn, uint64_t lun, 5605 uint32_t pri, bool atomic_create) 5606 { 5607 5608 struct lpfc_device_data *lun_info; 5609 int memory_flags; 5610 5611 if (unlikely(!phba) || !vport_wwpn || !target_wwpn || 5612 !(phba->cfg_fof)) 5613 return NULL; 5614 5615 /* Attempt to create the device data to contain lun info */ 5616 5617 if (atomic_create) 5618 memory_flags = GFP_ATOMIC; 5619 else 5620 memory_flags = GFP_KERNEL; 5621 lun_info = mempool_alloc(phba->device_data_mem_pool, memory_flags); 5622 if (!lun_info) 5623 return NULL; 5624 INIT_LIST_HEAD(&lun_info->listentry); 5625 lun_info->rport_data = NULL; 5626 memcpy(&lun_info->device_id.vport_wwpn, vport_wwpn, 5627 sizeof(struct lpfc_name)); 5628 memcpy(&lun_info->device_id.target_wwpn, target_wwpn, 5629 sizeof(struct lpfc_name)); 5630 lun_info->device_id.lun = lun; 5631 lun_info->oas_enabled = false; 5632 lun_info->priority = pri; 5633 lun_info->available = false; 5634 return lun_info; 5635 } 5636 5637 /** 5638 * lpfc_delete_device_data - frees a device data structure for OAS 5639 * @pha: Pointer to host bus adapter structure. 5640 * @lun_info: Pointer to device data structure to free. 5641 * 5642 * This routine frees the previously allocated device data structure passed. 5643 * 5644 **/ 5645 void 5646 lpfc_delete_device_data(struct lpfc_hba *phba, 5647 struct lpfc_device_data *lun_info) 5648 { 5649 5650 if (unlikely(!phba) || !lun_info || 5651 !(phba->cfg_fof)) 5652 return; 5653 5654 if (!list_empty(&lun_info->listentry)) 5655 list_del(&lun_info->listentry); 5656 mempool_free(lun_info, phba->device_data_mem_pool); 5657 return; 5658 } 5659 5660 /** 5661 * __lpfc_get_device_data - returns the device data for the specified lun 5662 * @pha: Pointer to host bus adapter structure. 5663 * @list: Point to list to search. 5664 * @vport_wwpn: Pointer to vport's wwpn information 5665 * @target_wwpn: Pointer to target's wwpn information 5666 * @lun: Lun on target 5667 * 5668 * This routine searches the list passed for the specified lun's device data. 5669 * This function does not hold locks, it is the responsibility of the caller 5670 * to ensure the proper lock is held before calling the function. 5671 * 5672 * Return codes: 5673 * NULL - Error 5674 * Pointer to lpfc_device_data - Success 5675 **/ 5676 struct lpfc_device_data* 5677 __lpfc_get_device_data(struct lpfc_hba *phba, struct list_head *list, 5678 struct lpfc_name *vport_wwpn, 5679 struct lpfc_name *target_wwpn, uint64_t lun) 5680 { 5681 5682 struct lpfc_device_data *lun_info; 5683 5684 if (unlikely(!phba) || !list || !vport_wwpn || !target_wwpn || 5685 !phba->cfg_fof) 5686 return NULL; 5687 5688 /* Check to see if the lun is already enabled for OAS. */ 5689 5690 list_for_each_entry(lun_info, list, listentry) { 5691 if ((memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn, 5692 sizeof(struct lpfc_name)) == 0) && 5693 (memcmp(&lun_info->device_id.target_wwpn, target_wwpn, 5694 sizeof(struct lpfc_name)) == 0) && 5695 (lun_info->device_id.lun == lun)) 5696 return lun_info; 5697 } 5698 5699 return NULL; 5700 } 5701 5702 /** 5703 * lpfc_find_next_oas_lun - searches for the next oas lun 5704 * @pha: Pointer to host bus adapter structure. 5705 * @vport_wwpn: Pointer to vport's wwpn information 5706 * @target_wwpn: Pointer to target's wwpn information 5707 * @starting_lun: Pointer to the lun to start searching for 5708 * @found_vport_wwpn: Pointer to the found lun's vport wwpn information 5709 * @found_target_wwpn: Pointer to the found lun's target wwpn information 5710 * @found_lun: Pointer to the found lun. 5711 * @found_lun_status: Pointer to status of the found lun. 5712 * 5713 * This routine searches the luns list for the specified lun 5714 * or the first lun for the vport/target. If the vport wwpn contains 5715 * a zero value then a specific vport is not specified. In this case 5716 * any vport which contains the lun will be considered a match. If the 5717 * target wwpn contains a zero value then a specific target is not specified. 5718 * In this case any target which contains the lun will be considered a 5719 * match. If the lun is found, the lun, vport wwpn, target wwpn and lun status 5720 * are returned. The function will also return the next lun if available. 5721 * If the next lun is not found, starting_lun parameter will be set to 5722 * NO_MORE_OAS_LUN. 5723 * 5724 * Return codes: 5725 * non-0 - Error 5726 * 0 - Success 5727 **/ 5728 bool 5729 lpfc_find_next_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn, 5730 struct lpfc_name *target_wwpn, uint64_t *starting_lun, 5731 struct lpfc_name *found_vport_wwpn, 5732 struct lpfc_name *found_target_wwpn, 5733 uint64_t *found_lun, 5734 uint32_t *found_lun_status, 5735 uint32_t *found_lun_pri) 5736 { 5737 5738 unsigned long flags; 5739 struct lpfc_device_data *lun_info; 5740 struct lpfc_device_id *device_id; 5741 uint64_t lun; 5742 bool found = false; 5743 5744 if (unlikely(!phba) || !vport_wwpn || !target_wwpn || 5745 !starting_lun || !found_vport_wwpn || 5746 !found_target_wwpn || !found_lun || !found_lun_status || 5747 (*starting_lun == NO_MORE_OAS_LUN) || 5748 !phba->cfg_fof) 5749 return false; 5750 5751 lun = *starting_lun; 5752 *found_lun = NO_MORE_OAS_LUN; 5753 *starting_lun = NO_MORE_OAS_LUN; 5754 5755 /* Search for lun or the lun closet in value */ 5756 5757 spin_lock_irqsave(&phba->devicelock, flags); 5758 list_for_each_entry(lun_info, &phba->luns, listentry) { 5759 if (((wwn_to_u64(vport_wwpn->u.wwn) == 0) || 5760 (memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn, 5761 sizeof(struct lpfc_name)) == 0)) && 5762 ((wwn_to_u64(target_wwpn->u.wwn) == 0) || 5763 (memcmp(&lun_info->device_id.target_wwpn, target_wwpn, 5764 sizeof(struct lpfc_name)) == 0)) && 5765 (lun_info->oas_enabled)) { 5766 device_id = &lun_info->device_id; 5767 if ((!found) && 5768 ((lun == FIND_FIRST_OAS_LUN) || 5769 (device_id->lun == lun))) { 5770 *found_lun = device_id->lun; 5771 memcpy(found_vport_wwpn, 5772 &device_id->vport_wwpn, 5773 sizeof(struct lpfc_name)); 5774 memcpy(found_target_wwpn, 5775 &device_id->target_wwpn, 5776 sizeof(struct lpfc_name)); 5777 if (lun_info->available) 5778 *found_lun_status = 5779 OAS_LUN_STATUS_EXISTS; 5780 else 5781 *found_lun_status = 0; 5782 *found_lun_pri = lun_info->priority; 5783 if (phba->cfg_oas_flags & OAS_FIND_ANY_VPORT) 5784 memset(vport_wwpn, 0x0, 5785 sizeof(struct lpfc_name)); 5786 if (phba->cfg_oas_flags & OAS_FIND_ANY_TARGET) 5787 memset(target_wwpn, 0x0, 5788 sizeof(struct lpfc_name)); 5789 found = true; 5790 } else if (found) { 5791 *starting_lun = device_id->lun; 5792 memcpy(vport_wwpn, &device_id->vport_wwpn, 5793 sizeof(struct lpfc_name)); 5794 memcpy(target_wwpn, &device_id->target_wwpn, 5795 sizeof(struct lpfc_name)); 5796 break; 5797 } 5798 } 5799 } 5800 spin_unlock_irqrestore(&phba->devicelock, flags); 5801 return found; 5802 } 5803 5804 /** 5805 * lpfc_enable_oas_lun - enables a lun for OAS operations 5806 * @pha: Pointer to host bus adapter structure. 5807 * @vport_wwpn: Pointer to vport's wwpn information 5808 * @target_wwpn: Pointer to target's wwpn information 5809 * @lun: Lun 5810 * 5811 * This routine enables a lun for oas operations. The routines does so by 5812 * doing the following : 5813 * 5814 * 1) Checks to see if the device data for the lun has been created. 5815 * 2) If found, sets the OAS enabled flag if not set and returns. 5816 * 3) Otherwise, creates a device data structure. 5817 * 4) If successfully created, indicates the device data is for an OAS lun, 5818 * indicates the lun is not available and add to the list of luns. 5819 * 5820 * Return codes: 5821 * false - Error 5822 * true - Success 5823 **/ 5824 bool 5825 lpfc_enable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn, 5826 struct lpfc_name *target_wwpn, uint64_t lun, uint8_t pri) 5827 { 5828 5829 struct lpfc_device_data *lun_info; 5830 unsigned long flags; 5831 5832 if (unlikely(!phba) || !vport_wwpn || !target_wwpn || 5833 !phba->cfg_fof) 5834 return false; 5835 5836 spin_lock_irqsave(&phba->devicelock, flags); 5837 5838 /* Check to see if the device data for the lun has been created */ 5839 lun_info = __lpfc_get_device_data(phba, &phba->luns, vport_wwpn, 5840 target_wwpn, lun); 5841 if (lun_info) { 5842 if (!lun_info->oas_enabled) 5843 lun_info->oas_enabled = true; 5844 lun_info->priority = pri; 5845 spin_unlock_irqrestore(&phba->devicelock, flags); 5846 return true; 5847 } 5848 5849 /* Create an lun info structure and add to list of luns */ 5850 lun_info = lpfc_create_device_data(phba, vport_wwpn, target_wwpn, lun, 5851 pri, false); 5852 if (lun_info) { 5853 lun_info->oas_enabled = true; 5854 lun_info->priority = pri; 5855 lun_info->available = false; 5856 list_add_tail(&lun_info->listentry, &phba->luns); 5857 spin_unlock_irqrestore(&phba->devicelock, flags); 5858 return true; 5859 } 5860 spin_unlock_irqrestore(&phba->devicelock, flags); 5861 return false; 5862 } 5863 5864 /** 5865 * lpfc_disable_oas_lun - disables a lun for OAS operations 5866 * @pha: Pointer to host bus adapter structure. 5867 * @vport_wwpn: Pointer to vport's wwpn information 5868 * @target_wwpn: Pointer to target's wwpn information 5869 * @lun: Lun 5870 * 5871 * This routine disables a lun for oas operations. The routines does so by 5872 * doing the following : 5873 * 5874 * 1) Checks to see if the device data for the lun is created. 5875 * 2) If present, clears the flag indicating this lun is for OAS. 5876 * 3) If the lun is not available by the system, the device data is 5877 * freed. 5878 * 5879 * Return codes: 5880 * false - Error 5881 * true - Success 5882 **/ 5883 bool 5884 lpfc_disable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn, 5885 struct lpfc_name *target_wwpn, uint64_t lun, uint8_t pri) 5886 { 5887 5888 struct lpfc_device_data *lun_info; 5889 unsigned long flags; 5890 5891 if (unlikely(!phba) || !vport_wwpn || !target_wwpn || 5892 !phba->cfg_fof) 5893 return false; 5894 5895 spin_lock_irqsave(&phba->devicelock, flags); 5896 5897 /* Check to see if the lun is available. */ 5898 lun_info = __lpfc_get_device_data(phba, 5899 &phba->luns, vport_wwpn, 5900 target_wwpn, lun); 5901 if (lun_info) { 5902 lun_info->oas_enabled = false; 5903 lun_info->priority = pri; 5904 if (!lun_info->available) 5905 lpfc_delete_device_data(phba, lun_info); 5906 spin_unlock_irqrestore(&phba->devicelock, flags); 5907 return true; 5908 } 5909 5910 spin_unlock_irqrestore(&phba->devicelock, flags); 5911 return false; 5912 } 5913 5914 static int 5915 lpfc_no_command(struct Scsi_Host *shost, struct scsi_cmnd *cmnd) 5916 { 5917 return SCSI_MLQUEUE_HOST_BUSY; 5918 } 5919 5920 static int 5921 lpfc_no_handler(struct scsi_cmnd *cmnd) 5922 { 5923 return FAILED; 5924 } 5925 5926 static int 5927 lpfc_no_slave(struct scsi_device *sdev) 5928 { 5929 return -ENODEV; 5930 } 5931 5932 struct scsi_host_template lpfc_template_nvme = { 5933 .module = THIS_MODULE, 5934 .name = LPFC_DRIVER_NAME, 5935 .proc_name = LPFC_DRIVER_NAME, 5936 .info = lpfc_info, 5937 .queuecommand = lpfc_no_command, 5938 .eh_abort_handler = lpfc_no_handler, 5939 .eh_device_reset_handler = lpfc_no_handler, 5940 .eh_target_reset_handler = lpfc_no_handler, 5941 .eh_bus_reset_handler = lpfc_no_handler, 5942 .eh_host_reset_handler = lpfc_no_handler, 5943 .slave_alloc = lpfc_no_slave, 5944 .slave_configure = lpfc_no_slave, 5945 .scan_finished = lpfc_scan_finished, 5946 .this_id = -1, 5947 .sg_tablesize = 1, 5948 .cmd_per_lun = 1, 5949 .use_clustering = ENABLE_CLUSTERING, 5950 .shost_attrs = lpfc_hba_attrs, 5951 .max_sectors = 0xFFFF, 5952 .vendor_id = LPFC_NL_VENDOR_ID, 5953 .track_queue_depth = 0, 5954 }; 5955 5956 struct scsi_host_template lpfc_template_no_hr = { 5957 .module = THIS_MODULE, 5958 .name = LPFC_DRIVER_NAME, 5959 .proc_name = LPFC_DRIVER_NAME, 5960 .info = lpfc_info, 5961 .queuecommand = lpfc_queuecommand, 5962 .eh_timed_out = fc_eh_timed_out, 5963 .eh_abort_handler = lpfc_abort_handler, 5964 .eh_device_reset_handler = lpfc_device_reset_handler, 5965 .eh_target_reset_handler = lpfc_target_reset_handler, 5966 .eh_bus_reset_handler = lpfc_bus_reset_handler, 5967 .slave_alloc = lpfc_slave_alloc, 5968 .slave_configure = lpfc_slave_configure, 5969 .slave_destroy = lpfc_slave_destroy, 5970 .scan_finished = lpfc_scan_finished, 5971 .this_id = -1, 5972 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT, 5973 .cmd_per_lun = LPFC_CMD_PER_LUN, 5974 .use_clustering = ENABLE_CLUSTERING, 5975 .shost_attrs = lpfc_hba_attrs, 5976 .max_sectors = 0xFFFF, 5977 .vendor_id = LPFC_NL_VENDOR_ID, 5978 .change_queue_depth = scsi_change_queue_depth, 5979 .track_queue_depth = 1, 5980 }; 5981 5982 struct scsi_host_template lpfc_template = { 5983 .module = THIS_MODULE, 5984 .name = LPFC_DRIVER_NAME, 5985 .proc_name = LPFC_DRIVER_NAME, 5986 .info = lpfc_info, 5987 .queuecommand = lpfc_queuecommand, 5988 .eh_timed_out = fc_eh_timed_out, 5989 .eh_abort_handler = lpfc_abort_handler, 5990 .eh_device_reset_handler = lpfc_device_reset_handler, 5991 .eh_target_reset_handler = lpfc_target_reset_handler, 5992 .eh_bus_reset_handler = lpfc_bus_reset_handler, 5993 .eh_host_reset_handler = lpfc_host_reset_handler, 5994 .slave_alloc = lpfc_slave_alloc, 5995 .slave_configure = lpfc_slave_configure, 5996 .slave_destroy = lpfc_slave_destroy, 5997 .scan_finished = lpfc_scan_finished, 5998 .this_id = -1, 5999 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT, 6000 .cmd_per_lun = LPFC_CMD_PER_LUN, 6001 .use_clustering = ENABLE_CLUSTERING, 6002 .shost_attrs = lpfc_hba_attrs, 6003 .max_sectors = 0xFFFF, 6004 .vendor_id = LPFC_NL_VENDOR_ID, 6005 .change_queue_depth = scsi_change_queue_depth, 6006 .track_queue_depth = 1, 6007 }; 6008 6009 struct scsi_host_template lpfc_vport_template = { 6010 .module = THIS_MODULE, 6011 .name = LPFC_DRIVER_NAME, 6012 .proc_name = LPFC_DRIVER_NAME, 6013 .info = lpfc_info, 6014 .queuecommand = lpfc_queuecommand, 6015 .eh_timed_out = fc_eh_timed_out, 6016 .eh_abort_handler = lpfc_abort_handler, 6017 .eh_device_reset_handler = lpfc_device_reset_handler, 6018 .eh_target_reset_handler = lpfc_target_reset_handler, 6019 .slave_alloc = lpfc_slave_alloc, 6020 .slave_configure = lpfc_slave_configure, 6021 .slave_destroy = lpfc_slave_destroy, 6022 .scan_finished = lpfc_scan_finished, 6023 .this_id = -1, 6024 .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT, 6025 .cmd_per_lun = LPFC_CMD_PER_LUN, 6026 .use_clustering = ENABLE_CLUSTERING, 6027 .shost_attrs = lpfc_vport_attrs, 6028 .max_sectors = 0xFFFF, 6029 .change_queue_depth = scsi_change_queue_depth, 6030 .track_queue_depth = 1, 6031 }; 6032