1 /******************************************************************* 2 * This file is part of the Emulex Linux Device Driver for * 3 * Fibre Channel Host Bus Adapters. * 4 * Copyright (C) 2017-2021 Broadcom. All Rights Reserved. The term * 5 * “Broadcom” refers to Broadcom Inc. 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/delay.h> 27 #include <asm/unaligned.h> 28 #include <linux/crc-t10dif.h> 29 #include <net/checksum.h> 30 31 #include <scsi/scsi.h> 32 #include <scsi/scsi_device.h> 33 #include <scsi/scsi_eh.h> 34 #include <scsi/scsi_host.h> 35 #include <scsi/scsi_tcq.h> 36 #include <scsi/scsi_transport_fc.h> 37 #include <scsi/fc/fc_fs.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_nvme.h" 48 #include "lpfc_scsi.h" 49 #include "lpfc_logmsg.h" 50 #include "lpfc_crtn.h" 51 #include "lpfc_vport.h" 52 #include "lpfc_debugfs.h" 53 54 /* NVME initiator-based functions */ 55 56 static struct lpfc_io_buf * 57 lpfc_get_nvme_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp, 58 int idx, int expedite); 59 60 static void 61 lpfc_release_nvme_buf(struct lpfc_hba *, struct lpfc_io_buf *); 62 63 static struct nvme_fc_port_template lpfc_nvme_template; 64 65 /** 66 * lpfc_nvme_create_queue - 67 * @pnvme_lport: Transport localport that LS is to be issued from 68 * @qidx: An cpu index used to affinitize IO queues and MSIX vectors. 69 * @qsize: Size of the queue in bytes 70 * @handle: An opaque driver handle used in follow-up calls. 71 * 72 * Driver registers this routine to preallocate and initialize any 73 * internal data structures to bind the @qidx to its internal IO queues. 74 * A hardware queue maps (qidx) to a specific driver MSI-X vector/EQ/CQ/WQ. 75 * 76 * Return value : 77 * 0 - Success 78 * -EINVAL - Unsupported input value. 79 * -ENOMEM - Could not alloc necessary memory 80 **/ 81 static int 82 lpfc_nvme_create_queue(struct nvme_fc_local_port *pnvme_lport, 83 unsigned int qidx, u16 qsize, 84 void **handle) 85 { 86 struct lpfc_nvme_lport *lport; 87 struct lpfc_vport *vport; 88 struct lpfc_nvme_qhandle *qhandle; 89 char *str; 90 91 if (!pnvme_lport->private) 92 return -ENOMEM; 93 94 lport = (struct lpfc_nvme_lport *)pnvme_lport->private; 95 vport = lport->vport; 96 qhandle = kzalloc(sizeof(struct lpfc_nvme_qhandle), GFP_KERNEL); 97 if (qhandle == NULL) 98 return -ENOMEM; 99 100 qhandle->cpu_id = raw_smp_processor_id(); 101 qhandle->qidx = qidx; 102 /* 103 * NVME qidx == 0 is the admin queue, so both admin queue 104 * and first IO queue will use MSI-X vector and associated 105 * EQ/CQ/WQ at index 0. After that they are sequentially assigned. 106 */ 107 if (qidx) { 108 str = "IO "; /* IO queue */ 109 qhandle->index = ((qidx - 1) % 110 lpfc_nvme_template.max_hw_queues); 111 } else { 112 str = "ADM"; /* Admin queue */ 113 qhandle->index = qidx; 114 } 115 116 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME, 117 "6073 Binding %s HdwQueue %d (cpu %d) to " 118 "hdw_queue %d qhandle x%px\n", str, 119 qidx, qhandle->cpu_id, qhandle->index, qhandle); 120 *handle = (void *)qhandle; 121 return 0; 122 } 123 124 /** 125 * lpfc_nvme_delete_queue - 126 * @pnvme_lport: Transport localport that LS is to be issued from 127 * @qidx: An cpu index used to affinitize IO queues and MSIX vectors. 128 * @handle: An opaque driver handle from lpfc_nvme_create_queue 129 * 130 * Driver registers this routine to free 131 * any internal data structures to bind the @qidx to its internal 132 * IO queues. 133 * 134 * Return value : 135 * 0 - Success 136 * TODO: What are the failure codes. 137 **/ 138 static void 139 lpfc_nvme_delete_queue(struct nvme_fc_local_port *pnvme_lport, 140 unsigned int qidx, 141 void *handle) 142 { 143 struct lpfc_nvme_lport *lport; 144 struct lpfc_vport *vport; 145 146 if (!pnvme_lport->private) 147 return; 148 149 lport = (struct lpfc_nvme_lport *)pnvme_lport->private; 150 vport = lport->vport; 151 152 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME, 153 "6001 ENTER. lpfc_pnvme x%px, qidx x%x qhandle x%px\n", 154 lport, qidx, handle); 155 kfree(handle); 156 } 157 158 static void 159 lpfc_nvme_localport_delete(struct nvme_fc_local_port *localport) 160 { 161 struct lpfc_nvme_lport *lport = localport->private; 162 163 lpfc_printf_vlog(lport->vport, KERN_INFO, LOG_NVME, 164 "6173 localport x%px delete complete\n", 165 lport); 166 167 /* release any threads waiting for the unreg to complete */ 168 if (lport->vport->localport) 169 complete(lport->lport_unreg_cmp); 170 } 171 172 /* lpfc_nvme_remoteport_delete 173 * 174 * @remoteport: Pointer to an nvme transport remoteport instance. 175 * 176 * This is a template downcall. NVME transport calls this function 177 * when it has completed the unregistration of a previously 178 * registered remoteport. 179 * 180 * Return value : 181 * None 182 */ 183 static void 184 lpfc_nvme_remoteport_delete(struct nvme_fc_remote_port *remoteport) 185 { 186 struct lpfc_nvme_rport *rport = remoteport->private; 187 struct lpfc_vport *vport; 188 struct lpfc_nodelist *ndlp; 189 u32 fc4_xpt_flags; 190 191 ndlp = rport->ndlp; 192 if (!ndlp) { 193 pr_err("**** %s: NULL ndlp on rport x%px remoteport x%px\n", 194 __func__, rport, remoteport); 195 goto rport_err; 196 } 197 198 vport = ndlp->vport; 199 if (!vport) { 200 pr_err("**** %s: Null vport on ndlp x%px, ste x%x rport x%px\n", 201 __func__, ndlp, ndlp->nlp_state, rport); 202 goto rport_err; 203 } 204 205 fc4_xpt_flags = NVME_XPT_REGD | SCSI_XPT_REGD; 206 207 /* Remove this rport from the lport's list - memory is owned by the 208 * transport. Remove the ndlp reference for the NVME transport before 209 * calling state machine to remove the node. 210 */ 211 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC, 212 "6146 remoteport delete of remoteport x%px\n", 213 remoteport); 214 spin_lock_irq(&ndlp->lock); 215 216 /* The register rebind might have occurred before the delete 217 * downcall. Guard against this race. 218 */ 219 if (ndlp->fc4_xpt_flags & NLP_WAIT_FOR_UNREG) 220 ndlp->fc4_xpt_flags &= ~(NLP_WAIT_FOR_UNREG | NVME_XPT_REGD); 221 222 spin_unlock_irq(&ndlp->lock); 223 224 /* On a devloss timeout event, one more put is executed provided the 225 * NVME and SCSI rport unregister requests are complete. If the vport 226 * is unloading, this extra put is executed by lpfc_drop_node. 227 */ 228 if (!(ndlp->fc4_xpt_flags & fc4_xpt_flags)) 229 lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM); 230 231 rport_err: 232 return; 233 } 234 235 /** 236 * lpfc_nvme_handle_lsreq - Process an unsolicited NVME LS request 237 * @phba: pointer to lpfc hba data structure. 238 * @axchg: pointer to exchange context for the NVME LS request 239 * 240 * This routine is used for processing an asychronously received NVME LS 241 * request. Any remaining validation is done and the LS is then forwarded 242 * to the nvme-fc transport via nvme_fc_rcv_ls_req(). 243 * 244 * The calling sequence should be: nvme_fc_rcv_ls_req() -> (processing) 245 * -> lpfc_nvme_xmt_ls_rsp/cmp -> req->done. 246 * __lpfc_nvme_xmt_ls_rsp_cmp should free the allocated axchg. 247 * 248 * Returns 0 if LS was handled and delivered to the transport 249 * Returns 1 if LS failed to be handled and should be dropped 250 */ 251 int 252 lpfc_nvme_handle_lsreq(struct lpfc_hba *phba, 253 struct lpfc_async_xchg_ctx *axchg) 254 { 255 #if (IS_ENABLED(CONFIG_NVME_FC)) 256 struct lpfc_vport *vport; 257 struct lpfc_nvme_rport *lpfc_rport; 258 struct nvme_fc_remote_port *remoteport; 259 struct lpfc_nvme_lport *lport; 260 uint32_t *payload = axchg->payload; 261 int rc; 262 263 vport = axchg->ndlp->vport; 264 lpfc_rport = axchg->ndlp->nrport; 265 if (!lpfc_rport) 266 return -EINVAL; 267 268 remoteport = lpfc_rport->remoteport; 269 if (!vport->localport) 270 return -EINVAL; 271 272 lport = vport->localport->private; 273 if (!lport) 274 return -EINVAL; 275 276 rc = nvme_fc_rcv_ls_req(remoteport, &axchg->ls_rsp, axchg->payload, 277 axchg->size); 278 279 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC, 280 "6205 NVME Unsol rcv: sz %d rc %d: %08x %08x %08x " 281 "%08x %08x %08x\n", 282 axchg->size, rc, 283 *payload, *(payload+1), *(payload+2), 284 *(payload+3), *(payload+4), *(payload+5)); 285 286 if (!rc) 287 return 0; 288 #endif 289 return 1; 290 } 291 292 /** 293 * __lpfc_nvme_ls_req_cmp - Generic completion handler for a NVME 294 * LS request. 295 * @phba: Pointer to HBA context object 296 * @vport: The local port that issued the LS 297 * @cmdwqe: Pointer to driver command WQE object. 298 * @wcqe: Pointer to driver response CQE object. 299 * 300 * This function is the generic completion handler for NVME LS requests. 301 * The function updates any states and statistics, calls the transport 302 * ls_req done() routine, then tears down the command and buffers used 303 * for the LS request. 304 **/ 305 void 306 __lpfc_nvme_ls_req_cmp(struct lpfc_hba *phba, struct lpfc_vport *vport, 307 struct lpfc_iocbq *cmdwqe, 308 struct lpfc_wcqe_complete *wcqe) 309 { 310 struct nvmefc_ls_req *pnvme_lsreq; 311 struct lpfc_dmabuf *buf_ptr; 312 struct lpfc_nodelist *ndlp; 313 uint32_t status; 314 315 pnvme_lsreq = (struct nvmefc_ls_req *)cmdwqe->context2; 316 ndlp = (struct lpfc_nodelist *)cmdwqe->context1; 317 status = bf_get(lpfc_wcqe_c_status, wcqe) & LPFC_IOCB_STATUS_MASK; 318 319 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC, 320 "6047 NVMEx LS REQ x%px cmpl DID %x Xri: %x " 321 "status %x reason x%x cmd:x%px lsreg:x%px bmp:x%px " 322 "ndlp:x%px\n", 323 pnvme_lsreq, ndlp ? ndlp->nlp_DID : 0, 324 cmdwqe->sli4_xritag, status, 325 (wcqe->parameter & 0xffff), 326 cmdwqe, pnvme_lsreq, cmdwqe->context3, ndlp); 327 328 lpfc_nvmeio_data(phba, "NVMEx LS CMPL: xri x%x stat x%x parm x%x\n", 329 cmdwqe->sli4_xritag, status, wcqe->parameter); 330 331 if (cmdwqe->context3) { 332 buf_ptr = (struct lpfc_dmabuf *)cmdwqe->context3; 333 lpfc_mbuf_free(phba, buf_ptr->virt, buf_ptr->phys); 334 kfree(buf_ptr); 335 cmdwqe->context3 = NULL; 336 } 337 if (pnvme_lsreq->done) 338 pnvme_lsreq->done(pnvme_lsreq, status); 339 else 340 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, 341 "6046 NVMEx cmpl without done call back? " 342 "Data x%px DID %x Xri: %x status %x\n", 343 pnvme_lsreq, ndlp ? ndlp->nlp_DID : 0, 344 cmdwqe->sli4_xritag, status); 345 if (ndlp) { 346 lpfc_nlp_put(ndlp); 347 cmdwqe->context1 = NULL; 348 } 349 lpfc_sli_release_iocbq(phba, cmdwqe); 350 } 351 352 static void 353 lpfc_nvme_ls_req_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe, 354 struct lpfc_wcqe_complete *wcqe) 355 { 356 struct lpfc_vport *vport = cmdwqe->vport; 357 struct lpfc_nvme_lport *lport; 358 uint32_t status; 359 360 status = bf_get(lpfc_wcqe_c_status, wcqe) & LPFC_IOCB_STATUS_MASK; 361 362 if (vport->localport) { 363 lport = (struct lpfc_nvme_lport *)vport->localport->private; 364 if (lport) { 365 atomic_inc(&lport->fc4NvmeLsCmpls); 366 if (status) { 367 if (bf_get(lpfc_wcqe_c_xb, wcqe)) 368 atomic_inc(&lport->cmpl_ls_xb); 369 atomic_inc(&lport->cmpl_ls_err); 370 } 371 } 372 } 373 374 __lpfc_nvme_ls_req_cmp(phba, vport, cmdwqe, wcqe); 375 } 376 377 static int 378 lpfc_nvme_gen_req(struct lpfc_vport *vport, struct lpfc_dmabuf *bmp, 379 struct lpfc_dmabuf *inp, 380 struct nvmefc_ls_req *pnvme_lsreq, 381 void (*cmpl)(struct lpfc_hba *, struct lpfc_iocbq *, 382 struct lpfc_wcqe_complete *), 383 struct lpfc_nodelist *ndlp, uint32_t num_entry, 384 uint32_t tmo, uint8_t retry) 385 { 386 struct lpfc_hba *phba = vport->phba; 387 union lpfc_wqe128 *wqe; 388 struct lpfc_iocbq *genwqe; 389 struct ulp_bde64 *bpl; 390 struct ulp_bde64 bde; 391 int i, rc, xmit_len, first_len; 392 393 /* Allocate buffer for command WQE */ 394 genwqe = lpfc_sli_get_iocbq(phba); 395 if (genwqe == NULL) 396 return 1; 397 398 wqe = &genwqe->wqe; 399 /* Initialize only 64 bytes */ 400 memset(wqe, 0, sizeof(union lpfc_wqe)); 401 402 genwqe->context3 = (uint8_t *)bmp; 403 genwqe->iocb_flag |= LPFC_IO_NVME_LS; 404 405 /* Save for completion so we can release these resources */ 406 genwqe->context1 = lpfc_nlp_get(ndlp); 407 if (!genwqe->context1) { 408 dev_warn(&phba->pcidev->dev, 409 "Warning: Failed node ref, not sending LS_REQ\n"); 410 lpfc_sli_release_iocbq(phba, genwqe); 411 return 1; 412 } 413 414 genwqe->context2 = (uint8_t *)pnvme_lsreq; 415 /* Fill in payload, bp points to frame payload */ 416 417 if (!tmo) 418 /* FC spec states we need 3 * ratov for CT requests */ 419 tmo = (3 * phba->fc_ratov); 420 421 /* For this command calculate the xmit length of the request bde. */ 422 xmit_len = 0; 423 first_len = 0; 424 bpl = (struct ulp_bde64 *)bmp->virt; 425 for (i = 0; i < num_entry; i++) { 426 bde.tus.w = bpl[i].tus.w; 427 if (bde.tus.f.bdeFlags != BUFF_TYPE_BDE_64) 428 break; 429 xmit_len += bde.tus.f.bdeSize; 430 if (i == 0) 431 first_len = xmit_len; 432 } 433 434 genwqe->rsvd2 = num_entry; 435 genwqe->hba_wqidx = 0; 436 437 /* Words 0 - 2 */ 438 wqe->generic.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64; 439 wqe->generic.bde.tus.f.bdeSize = first_len; 440 wqe->generic.bde.addrLow = bpl[0].addrLow; 441 wqe->generic.bde.addrHigh = bpl[0].addrHigh; 442 443 /* Word 3 */ 444 wqe->gen_req.request_payload_len = first_len; 445 446 /* Word 4 */ 447 448 /* Word 5 */ 449 bf_set(wqe_dfctl, &wqe->gen_req.wge_ctl, 0); 450 bf_set(wqe_si, &wqe->gen_req.wge_ctl, 1); 451 bf_set(wqe_la, &wqe->gen_req.wge_ctl, 1); 452 bf_set(wqe_rctl, &wqe->gen_req.wge_ctl, FC_RCTL_ELS4_REQ); 453 bf_set(wqe_type, &wqe->gen_req.wge_ctl, FC_TYPE_NVME); 454 455 /* Word 6 */ 456 bf_set(wqe_ctxt_tag, &wqe->gen_req.wqe_com, 457 phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]); 458 bf_set(wqe_xri_tag, &wqe->gen_req.wqe_com, genwqe->sli4_xritag); 459 460 /* Word 7 */ 461 bf_set(wqe_tmo, &wqe->gen_req.wqe_com, tmo); 462 bf_set(wqe_class, &wqe->gen_req.wqe_com, CLASS3); 463 bf_set(wqe_cmnd, &wqe->gen_req.wqe_com, CMD_GEN_REQUEST64_WQE); 464 bf_set(wqe_ct, &wqe->gen_req.wqe_com, SLI4_CT_RPI); 465 466 /* Word 8 */ 467 wqe->gen_req.wqe_com.abort_tag = genwqe->iotag; 468 469 /* Word 9 */ 470 bf_set(wqe_reqtag, &wqe->gen_req.wqe_com, genwqe->iotag); 471 472 /* Word 10 */ 473 bf_set(wqe_dbde, &wqe->gen_req.wqe_com, 1); 474 bf_set(wqe_iod, &wqe->gen_req.wqe_com, LPFC_WQE_IOD_READ); 475 bf_set(wqe_qosd, &wqe->gen_req.wqe_com, 1); 476 bf_set(wqe_lenloc, &wqe->gen_req.wqe_com, LPFC_WQE_LENLOC_NONE); 477 bf_set(wqe_ebde_cnt, &wqe->gen_req.wqe_com, 0); 478 479 /* Word 11 */ 480 bf_set(wqe_cqid, &wqe->gen_req.wqe_com, LPFC_WQE_CQ_ID_DEFAULT); 481 bf_set(wqe_cmd_type, &wqe->gen_req.wqe_com, OTHER_COMMAND); 482 483 484 /* Issue GEN REQ WQE for NPORT <did> */ 485 genwqe->wqe_cmpl = cmpl; 486 genwqe->iocb_cmpl = NULL; 487 genwqe->drvrTimeout = tmo + LPFC_DRVR_TIMEOUT; 488 genwqe->vport = vport; 489 genwqe->retry = retry; 490 491 lpfc_nvmeio_data(phba, "NVME LS XMIT: xri x%x iotag x%x to x%06x\n", 492 genwqe->sli4_xritag, genwqe->iotag, ndlp->nlp_DID); 493 494 rc = lpfc_sli4_issue_wqe(phba, &phba->sli4_hba.hdwq[0], genwqe); 495 if (rc) { 496 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, 497 "6045 Issue GEN REQ WQE to NPORT x%x " 498 "Data: x%x x%x rc x%x\n", 499 ndlp->nlp_DID, genwqe->iotag, 500 vport->port_state, rc); 501 lpfc_nlp_put(ndlp); 502 lpfc_sli_release_iocbq(phba, genwqe); 503 return 1; 504 } 505 506 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC | LOG_ELS, 507 "6050 Issue GEN REQ WQE to NPORT x%x " 508 "Data: oxid: x%x state: x%x wq:x%px lsreq:x%px " 509 "bmp:x%px xmit:%d 1st:%d\n", 510 ndlp->nlp_DID, genwqe->sli4_xritag, 511 vport->port_state, 512 genwqe, pnvme_lsreq, bmp, xmit_len, first_len); 513 return 0; 514 } 515 516 517 /** 518 * __lpfc_nvme_ls_req - Generic service routine to issue an NVME LS request 519 * @vport: The local port issuing the LS 520 * @ndlp: The remote port to send the LS to 521 * @pnvme_lsreq: Pointer to LS request structure from the transport 522 * @gen_req_cmp: Completion call-back 523 * 524 * Routine validates the ndlp, builds buffers and sends a GEN_REQUEST 525 * WQE to perform the LS operation. 526 * 527 * Return value : 528 * 0 - Success 529 * non-zero: various error codes, in form of -Exxx 530 **/ 531 int 532 __lpfc_nvme_ls_req(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, 533 struct nvmefc_ls_req *pnvme_lsreq, 534 void (*gen_req_cmp)(struct lpfc_hba *phba, 535 struct lpfc_iocbq *cmdwqe, 536 struct lpfc_wcqe_complete *wcqe)) 537 { 538 struct lpfc_dmabuf *bmp; 539 struct ulp_bde64 *bpl; 540 int ret; 541 uint16_t ntype, nstate; 542 543 if (!ndlp) { 544 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, 545 "6051 NVMEx LS REQ: Bad NDLP x%px, Failing " 546 "LS Req\n", 547 ndlp); 548 return -ENODEV; 549 } 550 551 ntype = ndlp->nlp_type; 552 nstate = ndlp->nlp_state; 553 if ((ntype & NLP_NVME_TARGET && nstate != NLP_STE_MAPPED_NODE) || 554 (ntype & NLP_NVME_INITIATOR && nstate != NLP_STE_UNMAPPED_NODE)) { 555 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, 556 "6088 NVMEx LS REQ: Fail DID x%06x not " 557 "ready for IO. Type x%x, State x%x\n", 558 ndlp->nlp_DID, ntype, nstate); 559 return -ENODEV; 560 } 561 562 if (!vport->phba->sli4_hba.nvmels_wq) 563 return -ENOMEM; 564 565 /* 566 * there are two dma buf in the request, actually there is one and 567 * the second one is just the start address + cmd size. 568 * Before calling lpfc_nvme_gen_req these buffers need to be wrapped 569 * in a lpfc_dmabuf struct. When freeing we just free the wrapper 570 * because the nvem layer owns the data bufs. 571 * We do not have to break these packets open, we don't care what is 572 * in them. And we do not have to look at the resonse data, we only 573 * care that we got a response. All of the caring is going to happen 574 * in the nvme-fc layer. 575 */ 576 577 bmp = kmalloc(sizeof(*bmp), GFP_KERNEL); 578 if (!bmp) { 579 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, 580 "6044 NVMEx LS REQ: Could not alloc LS buf " 581 "for DID %x\n", 582 ndlp->nlp_DID); 583 return -ENOMEM; 584 } 585 586 bmp->virt = lpfc_mbuf_alloc(vport->phba, MEM_PRI, &(bmp->phys)); 587 if (!bmp->virt) { 588 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, 589 "6042 NVMEx LS REQ: Could not alloc mbuf " 590 "for DID %x\n", 591 ndlp->nlp_DID); 592 kfree(bmp); 593 return -ENOMEM; 594 } 595 596 INIT_LIST_HEAD(&bmp->list); 597 598 bpl = (struct ulp_bde64 *)bmp->virt; 599 bpl->addrHigh = le32_to_cpu(putPaddrHigh(pnvme_lsreq->rqstdma)); 600 bpl->addrLow = le32_to_cpu(putPaddrLow(pnvme_lsreq->rqstdma)); 601 bpl->tus.f.bdeFlags = 0; 602 bpl->tus.f.bdeSize = pnvme_lsreq->rqstlen; 603 bpl->tus.w = le32_to_cpu(bpl->tus.w); 604 bpl++; 605 606 bpl->addrHigh = le32_to_cpu(putPaddrHigh(pnvme_lsreq->rspdma)); 607 bpl->addrLow = le32_to_cpu(putPaddrLow(pnvme_lsreq->rspdma)); 608 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I; 609 bpl->tus.f.bdeSize = pnvme_lsreq->rsplen; 610 bpl->tus.w = le32_to_cpu(bpl->tus.w); 611 612 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC, 613 "6149 NVMEx LS REQ: Issue to DID 0x%06x lsreq x%px, " 614 "rqstlen:%d rsplen:%d %pad %pad\n", 615 ndlp->nlp_DID, pnvme_lsreq, pnvme_lsreq->rqstlen, 616 pnvme_lsreq->rsplen, &pnvme_lsreq->rqstdma, 617 &pnvme_lsreq->rspdma); 618 619 ret = lpfc_nvme_gen_req(vport, bmp, pnvme_lsreq->rqstaddr, 620 pnvme_lsreq, gen_req_cmp, ndlp, 2, 621 pnvme_lsreq->timeout, 0); 622 if (ret != WQE_SUCCESS) { 623 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, 624 "6052 NVMEx REQ: EXIT. issue ls wqe failed " 625 "lsreq x%px Status %x DID %x\n", 626 pnvme_lsreq, ret, ndlp->nlp_DID); 627 lpfc_mbuf_free(vport->phba, bmp->virt, bmp->phys); 628 kfree(bmp); 629 return -EIO; 630 } 631 632 return 0; 633 } 634 635 /** 636 * lpfc_nvme_ls_req - Issue an NVME Link Service request 637 * @pnvme_lport: Transport localport that LS is to be issued from. 638 * @pnvme_rport: Transport remoteport that LS is to be sent to. 639 * @pnvme_lsreq: the transport nvme_ls_req structure for the LS 640 * 641 * Driver registers this routine to handle any link service request 642 * from the nvme_fc transport to a remote nvme-aware port. 643 * 644 * Return value : 645 * 0 - Success 646 * non-zero: various error codes, in form of -Exxx 647 **/ 648 static int 649 lpfc_nvme_ls_req(struct nvme_fc_local_port *pnvme_lport, 650 struct nvme_fc_remote_port *pnvme_rport, 651 struct nvmefc_ls_req *pnvme_lsreq) 652 { 653 struct lpfc_nvme_lport *lport; 654 struct lpfc_nvme_rport *rport; 655 struct lpfc_vport *vport; 656 int ret; 657 658 lport = (struct lpfc_nvme_lport *)pnvme_lport->private; 659 rport = (struct lpfc_nvme_rport *)pnvme_rport->private; 660 if (unlikely(!lport) || unlikely(!rport)) 661 return -EINVAL; 662 663 vport = lport->vport; 664 if (vport->load_flag & FC_UNLOADING) 665 return -ENODEV; 666 667 atomic_inc(&lport->fc4NvmeLsRequests); 668 669 ret = __lpfc_nvme_ls_req(vport, rport->ndlp, pnvme_lsreq, 670 lpfc_nvme_ls_req_cmp); 671 if (ret) 672 atomic_inc(&lport->xmt_ls_err); 673 674 return ret; 675 } 676 677 /** 678 * __lpfc_nvme_ls_abort - Generic service routine to abort a prior 679 * NVME LS request 680 * @vport: The local port that issued the LS 681 * @ndlp: The remote port the LS was sent to 682 * @pnvme_lsreq: Pointer to LS request structure from the transport 683 * 684 * The driver validates the ndlp, looks for the LS, and aborts the 685 * LS if found. 686 * 687 * Returns: 688 * 0 : if LS found and aborted 689 * non-zero: various error conditions in form -Exxx 690 **/ 691 int 692 __lpfc_nvme_ls_abort(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, 693 struct nvmefc_ls_req *pnvme_lsreq) 694 { 695 struct lpfc_hba *phba = vport->phba; 696 struct lpfc_sli_ring *pring; 697 struct lpfc_iocbq *wqe, *next_wqe; 698 bool foundit = false; 699 700 if (!ndlp) { 701 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, 702 "6049 NVMEx LS REQ Abort: Bad NDLP x%px DID " 703 "x%06x, Failing LS Req\n", 704 ndlp, ndlp ? ndlp->nlp_DID : 0); 705 return -EINVAL; 706 } 707 708 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC | LOG_NVME_ABTS, 709 "6040 NVMEx LS REQ Abort: Issue LS_ABORT for lsreq " 710 "x%px rqstlen:%d rsplen:%d %pad %pad\n", 711 pnvme_lsreq, pnvme_lsreq->rqstlen, 712 pnvme_lsreq->rsplen, &pnvme_lsreq->rqstdma, 713 &pnvme_lsreq->rspdma); 714 715 /* 716 * Lock the ELS ring txcmplq and look for the wqe that matches 717 * this ELS. If found, issue an abort on the wqe. 718 */ 719 pring = phba->sli4_hba.nvmels_wq->pring; 720 spin_lock_irq(&phba->hbalock); 721 spin_lock(&pring->ring_lock); 722 list_for_each_entry_safe(wqe, next_wqe, &pring->txcmplq, list) { 723 if (wqe->context2 == pnvme_lsreq) { 724 wqe->iocb_flag |= LPFC_DRIVER_ABORTED; 725 foundit = true; 726 break; 727 } 728 } 729 spin_unlock(&pring->ring_lock); 730 731 if (foundit) 732 lpfc_sli_issue_abort_iotag(phba, pring, wqe, NULL); 733 spin_unlock_irq(&phba->hbalock); 734 735 if (foundit) 736 return 0; 737 738 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC | LOG_NVME_ABTS, 739 "6213 NVMEx LS REQ Abort: Unable to locate req x%px\n", 740 pnvme_lsreq); 741 return -EINVAL; 742 } 743 744 static int 745 lpfc_nvme_xmt_ls_rsp(struct nvme_fc_local_port *localport, 746 struct nvme_fc_remote_port *remoteport, 747 struct nvmefc_ls_rsp *ls_rsp) 748 { 749 struct lpfc_async_xchg_ctx *axchg = 750 container_of(ls_rsp, struct lpfc_async_xchg_ctx, ls_rsp); 751 struct lpfc_nvme_lport *lport; 752 int rc; 753 754 if (axchg->phba->pport->load_flag & FC_UNLOADING) 755 return -ENODEV; 756 757 lport = (struct lpfc_nvme_lport *)localport->private; 758 759 rc = __lpfc_nvme_xmt_ls_rsp(axchg, ls_rsp, __lpfc_nvme_xmt_ls_rsp_cmp); 760 761 if (rc) { 762 /* 763 * unless the failure is due to having already sent 764 * the response, an abort will be generated for the 765 * exchange if the rsp can't be sent. 766 */ 767 if (rc != -EALREADY) 768 atomic_inc(&lport->xmt_ls_abort); 769 return rc; 770 } 771 772 return 0; 773 } 774 775 /** 776 * lpfc_nvme_ls_abort - Abort a prior NVME LS request 777 * @pnvme_lport: Transport localport that LS is to be issued from. 778 * @pnvme_rport: Transport remoteport that LS is to be sent to. 779 * @pnvme_lsreq: the transport nvme_ls_req structure for the LS 780 * 781 * Driver registers this routine to abort a NVME LS request that is 782 * in progress (from the transports perspective). 783 **/ 784 static void 785 lpfc_nvme_ls_abort(struct nvme_fc_local_port *pnvme_lport, 786 struct nvme_fc_remote_port *pnvme_rport, 787 struct nvmefc_ls_req *pnvme_lsreq) 788 { 789 struct lpfc_nvme_lport *lport; 790 struct lpfc_vport *vport; 791 struct lpfc_nodelist *ndlp; 792 int ret; 793 794 lport = (struct lpfc_nvme_lport *)pnvme_lport->private; 795 if (unlikely(!lport)) 796 return; 797 vport = lport->vport; 798 799 if (vport->load_flag & FC_UNLOADING) 800 return; 801 802 ndlp = lpfc_findnode_did(vport, pnvme_rport->port_id); 803 804 ret = __lpfc_nvme_ls_abort(vport, ndlp, pnvme_lsreq); 805 if (!ret) 806 atomic_inc(&lport->xmt_ls_abort); 807 } 808 809 /* Fix up the existing sgls for NVME IO. */ 810 static inline void 811 lpfc_nvme_adj_fcp_sgls(struct lpfc_vport *vport, 812 struct lpfc_io_buf *lpfc_ncmd, 813 struct nvmefc_fcp_req *nCmd) 814 { 815 struct lpfc_hba *phba = vport->phba; 816 struct sli4_sge *sgl; 817 union lpfc_wqe128 *wqe; 818 uint32_t *wptr, *dptr; 819 820 /* 821 * Get a local pointer to the built-in wqe and correct 822 * the cmd size to match NVME's 96 bytes and fix 823 * the dma address. 824 */ 825 826 wqe = &lpfc_ncmd->cur_iocbq.wqe; 827 828 /* 829 * Adjust the FCP_CMD and FCP_RSP DMA data and sge_len to 830 * match NVME. NVME sends 96 bytes. Also, use the 831 * nvme commands command and response dma addresses 832 * rather than the virtual memory to ease the restore 833 * operation. 834 */ 835 sgl = lpfc_ncmd->dma_sgl; 836 sgl->sge_len = cpu_to_le32(nCmd->cmdlen); 837 if (phba->cfg_nvme_embed_cmd) { 838 sgl->addr_hi = 0; 839 sgl->addr_lo = 0; 840 841 /* Word 0-2 - NVME CMND IU (embedded payload) */ 842 wqe->generic.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_IMMED; 843 wqe->generic.bde.tus.f.bdeSize = 56; 844 wqe->generic.bde.addrHigh = 0; 845 wqe->generic.bde.addrLow = 64; /* Word 16 */ 846 847 /* Word 10 - dbde is 0, wqes is 1 in template */ 848 849 /* 850 * Embed the payload in the last half of the WQE 851 * WQE words 16-30 get the NVME CMD IU payload 852 * 853 * WQE words 16-19 get payload Words 1-4 854 * WQE words 20-21 get payload Words 6-7 855 * WQE words 22-29 get payload Words 16-23 856 */ 857 wptr = &wqe->words[16]; /* WQE ptr */ 858 dptr = (uint32_t *)nCmd->cmdaddr; /* payload ptr */ 859 dptr++; /* Skip Word 0 in payload */ 860 861 *wptr++ = *dptr++; /* Word 1 */ 862 *wptr++ = *dptr++; /* Word 2 */ 863 *wptr++ = *dptr++; /* Word 3 */ 864 *wptr++ = *dptr++; /* Word 4 */ 865 dptr++; /* Skip Word 5 in payload */ 866 *wptr++ = *dptr++; /* Word 6 */ 867 *wptr++ = *dptr++; /* Word 7 */ 868 dptr += 8; /* Skip Words 8-15 in payload */ 869 *wptr++ = *dptr++; /* Word 16 */ 870 *wptr++ = *dptr++; /* Word 17 */ 871 *wptr++ = *dptr++; /* Word 18 */ 872 *wptr++ = *dptr++; /* Word 19 */ 873 *wptr++ = *dptr++; /* Word 20 */ 874 *wptr++ = *dptr++; /* Word 21 */ 875 *wptr++ = *dptr++; /* Word 22 */ 876 *wptr = *dptr; /* Word 23 */ 877 } else { 878 sgl->addr_hi = cpu_to_le32(putPaddrHigh(nCmd->cmddma)); 879 sgl->addr_lo = cpu_to_le32(putPaddrLow(nCmd->cmddma)); 880 881 /* Word 0-2 - NVME CMND IU Inline BDE */ 882 wqe->generic.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64; 883 wqe->generic.bde.tus.f.bdeSize = nCmd->cmdlen; 884 wqe->generic.bde.addrHigh = sgl->addr_hi; 885 wqe->generic.bde.addrLow = sgl->addr_lo; 886 887 /* Word 10 */ 888 bf_set(wqe_dbde, &wqe->generic.wqe_com, 1); 889 bf_set(wqe_wqes, &wqe->generic.wqe_com, 0); 890 } 891 892 sgl++; 893 894 /* Setup the physical region for the FCP RSP */ 895 sgl->addr_hi = cpu_to_le32(putPaddrHigh(nCmd->rspdma)); 896 sgl->addr_lo = cpu_to_le32(putPaddrLow(nCmd->rspdma)); 897 sgl->word2 = le32_to_cpu(sgl->word2); 898 if (nCmd->sg_cnt) 899 bf_set(lpfc_sli4_sge_last, sgl, 0); 900 else 901 bf_set(lpfc_sli4_sge_last, sgl, 1); 902 sgl->word2 = cpu_to_le32(sgl->word2); 903 sgl->sge_len = cpu_to_le32(nCmd->rsplen); 904 } 905 906 907 /* 908 * lpfc_nvme_io_cmd_wqe_cmpl - Complete an NVME-over-FCP IO 909 * 910 * Driver registers this routine as it io request handler. This 911 * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq 912 * data structure to the rport indicated in @lpfc_nvme_rport. 913 * 914 * Return value : 915 * 0 - Success 916 * TODO: What are the failure codes. 917 **/ 918 static void 919 lpfc_nvme_io_cmd_wqe_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pwqeIn, 920 struct lpfc_wcqe_complete *wcqe) 921 { 922 struct lpfc_io_buf *lpfc_ncmd = 923 (struct lpfc_io_buf *)pwqeIn->context1; 924 struct lpfc_vport *vport = pwqeIn->vport; 925 struct nvmefc_fcp_req *nCmd; 926 struct nvme_fc_ersp_iu *ep; 927 struct nvme_fc_cmd_iu *cp; 928 struct lpfc_nodelist *ndlp; 929 struct lpfc_nvme_fcpreq_priv *freqpriv; 930 struct lpfc_nvme_lport *lport; 931 uint32_t code, status, idx; 932 uint16_t cid, sqhd, data; 933 uint32_t *ptr; 934 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 935 int cpu; 936 #endif 937 938 /* Sanity check on return of outstanding command */ 939 if (!lpfc_ncmd) { 940 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, 941 "6071 Null lpfc_ncmd pointer. No " 942 "release, skip completion\n"); 943 return; 944 } 945 946 /* Guard against abort handler being called at same time */ 947 spin_lock(&lpfc_ncmd->buf_lock); 948 949 if (!lpfc_ncmd->nvmeCmd) { 950 spin_unlock(&lpfc_ncmd->buf_lock); 951 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, 952 "6066 Missing cmpl ptrs: lpfc_ncmd x%px, " 953 "nvmeCmd x%px\n", 954 lpfc_ncmd, lpfc_ncmd->nvmeCmd); 955 956 /* Release the lpfc_ncmd regardless of the missing elements. */ 957 lpfc_release_nvme_buf(phba, lpfc_ncmd); 958 return; 959 } 960 nCmd = lpfc_ncmd->nvmeCmd; 961 status = bf_get(lpfc_wcqe_c_status, wcqe); 962 963 idx = lpfc_ncmd->cur_iocbq.hba_wqidx; 964 phba->sli4_hba.hdwq[idx].nvme_cstat.io_cmpls++; 965 966 if (unlikely(status && vport->localport)) { 967 lport = (struct lpfc_nvme_lport *)vport->localport->private; 968 if (lport) { 969 if (bf_get(lpfc_wcqe_c_xb, wcqe)) 970 atomic_inc(&lport->cmpl_fcp_xb); 971 atomic_inc(&lport->cmpl_fcp_err); 972 } 973 } 974 975 lpfc_nvmeio_data(phba, "NVME FCP CMPL: xri x%x stat x%x parm x%x\n", 976 lpfc_ncmd->cur_iocbq.sli4_xritag, 977 status, wcqe->parameter); 978 /* 979 * Catch race where our node has transitioned, but the 980 * transport is still transitioning. 981 */ 982 ndlp = lpfc_ncmd->ndlp; 983 if (!ndlp) { 984 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, 985 "6062 Ignoring NVME cmpl. No ndlp\n"); 986 goto out_err; 987 } 988 989 code = bf_get(lpfc_wcqe_c_code, wcqe); 990 if (code == CQE_CODE_NVME_ERSP) { 991 /* For this type of CQE, we need to rebuild the rsp */ 992 ep = (struct nvme_fc_ersp_iu *)nCmd->rspaddr; 993 994 /* 995 * Get Command Id from cmd to plug into response. This 996 * code is not needed in the next NVME Transport drop. 997 */ 998 cp = (struct nvme_fc_cmd_iu *)nCmd->cmdaddr; 999 cid = cp->sqe.common.command_id; 1000 1001 /* 1002 * RSN is in CQE word 2 1003 * SQHD is in CQE Word 3 bits 15:0 1004 * Cmd Specific info is in CQE Word 1 1005 * and in CQE Word 0 bits 15:0 1006 */ 1007 sqhd = bf_get(lpfc_wcqe_c_sqhead, wcqe); 1008 1009 /* Now lets build the NVME ERSP IU */ 1010 ep->iu_len = cpu_to_be16(8); 1011 ep->rsn = wcqe->parameter; 1012 ep->xfrd_len = cpu_to_be32(nCmd->payload_length); 1013 ep->rsvd12 = 0; 1014 ptr = (uint32_t *)&ep->cqe.result.u64; 1015 *ptr++ = wcqe->total_data_placed; 1016 data = bf_get(lpfc_wcqe_c_ersp0, wcqe); 1017 *ptr = (uint32_t)data; 1018 ep->cqe.sq_head = sqhd; 1019 ep->cqe.sq_id = nCmd->sqid; 1020 ep->cqe.command_id = cid; 1021 ep->cqe.status = 0; 1022 1023 lpfc_ncmd->status = IOSTAT_SUCCESS; 1024 lpfc_ncmd->result = 0; 1025 nCmd->rcv_rsplen = LPFC_NVME_ERSP_LEN; 1026 nCmd->transferred_length = nCmd->payload_length; 1027 } else { 1028 lpfc_ncmd->status = (status & LPFC_IOCB_STATUS_MASK); 1029 lpfc_ncmd->result = (wcqe->parameter & IOERR_PARAM_MASK); 1030 1031 /* For NVME, the only failure path that results in an 1032 * IO error is when the adapter rejects it. All other 1033 * conditions are a success case and resolved by the 1034 * transport. 1035 * IOSTAT_FCP_RSP_ERROR means: 1036 * 1. Length of data received doesn't match total 1037 * transfer length in WQE 1038 * 2. If the RSP payload does NOT match these cases: 1039 * a. RSP length 12/24 bytes and all zeros 1040 * b. NVME ERSP 1041 */ 1042 switch (lpfc_ncmd->status) { 1043 case IOSTAT_SUCCESS: 1044 nCmd->transferred_length = wcqe->total_data_placed; 1045 nCmd->rcv_rsplen = 0; 1046 nCmd->status = 0; 1047 break; 1048 case IOSTAT_FCP_RSP_ERROR: 1049 nCmd->transferred_length = wcqe->total_data_placed; 1050 nCmd->rcv_rsplen = wcqe->parameter; 1051 nCmd->status = 0; 1052 1053 /* Check if this is really an ERSP */ 1054 if (nCmd->rcv_rsplen == LPFC_NVME_ERSP_LEN) { 1055 lpfc_ncmd->status = IOSTAT_SUCCESS; 1056 lpfc_ncmd->result = 0; 1057 1058 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME, 1059 "6084 NVME Completion ERSP: " 1060 "xri %x placed x%x\n", 1061 lpfc_ncmd->cur_iocbq.sli4_xritag, 1062 wcqe->total_data_placed); 1063 break; 1064 } 1065 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, 1066 "6081 NVME Completion Protocol Error: " 1067 "xri %x status x%x result x%x " 1068 "placed x%x\n", 1069 lpfc_ncmd->cur_iocbq.sli4_xritag, 1070 lpfc_ncmd->status, lpfc_ncmd->result, 1071 wcqe->total_data_placed); 1072 break; 1073 case IOSTAT_LOCAL_REJECT: 1074 /* Let fall through to set command final state. */ 1075 if (lpfc_ncmd->result == IOERR_ABORT_REQUESTED) 1076 lpfc_printf_vlog(vport, KERN_INFO, 1077 LOG_NVME_IOERR, 1078 "6032 Delay Aborted cmd x%px " 1079 "nvme cmd x%px, xri x%x, " 1080 "xb %d\n", 1081 lpfc_ncmd, nCmd, 1082 lpfc_ncmd->cur_iocbq.sli4_xritag, 1083 bf_get(lpfc_wcqe_c_xb, wcqe)); 1084 fallthrough; 1085 default: 1086 out_err: 1087 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR, 1088 "6072 NVME Completion Error: xri %x " 1089 "status x%x result x%x [x%x] " 1090 "placed x%x\n", 1091 lpfc_ncmd->cur_iocbq.sli4_xritag, 1092 lpfc_ncmd->status, lpfc_ncmd->result, 1093 wcqe->parameter, 1094 wcqe->total_data_placed); 1095 nCmd->transferred_length = 0; 1096 nCmd->rcv_rsplen = 0; 1097 nCmd->status = NVME_SC_INTERNAL; 1098 } 1099 } 1100 1101 /* pick up SLI4 exhange busy condition */ 1102 if (bf_get(lpfc_wcqe_c_xb, wcqe)) 1103 lpfc_ncmd->flags |= LPFC_SBUF_XBUSY; 1104 else 1105 lpfc_ncmd->flags &= ~LPFC_SBUF_XBUSY; 1106 1107 /* Update stats and complete the IO. There is 1108 * no need for dma unprep because the nvme_transport 1109 * owns the dma address. 1110 */ 1111 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 1112 if (lpfc_ncmd->ts_cmd_start) { 1113 lpfc_ncmd->ts_isr_cmpl = pwqeIn->isr_timestamp; 1114 lpfc_ncmd->ts_data_io = ktime_get_ns(); 1115 phba->ktime_last_cmd = lpfc_ncmd->ts_data_io; 1116 lpfc_io_ktime(phba, lpfc_ncmd); 1117 } 1118 if (unlikely(phba->hdwqstat_on & LPFC_CHECK_NVME_IO)) { 1119 cpu = raw_smp_processor_id(); 1120 this_cpu_inc(phba->sli4_hba.c_stat->cmpl_io); 1121 if (lpfc_ncmd->cpu != cpu) 1122 lpfc_printf_vlog(vport, 1123 KERN_INFO, LOG_NVME_IOERR, 1124 "6701 CPU Check cmpl: " 1125 "cpu %d expect %d\n", 1126 cpu, lpfc_ncmd->cpu); 1127 } 1128 #endif 1129 1130 /* NVME targets need completion held off until the abort exchange 1131 * completes unless the NVME Rport is getting unregistered. 1132 */ 1133 1134 if (!(lpfc_ncmd->flags & LPFC_SBUF_XBUSY)) { 1135 freqpriv = nCmd->private; 1136 freqpriv->nvme_buf = NULL; 1137 lpfc_ncmd->nvmeCmd = NULL; 1138 spin_unlock(&lpfc_ncmd->buf_lock); 1139 nCmd->done(nCmd); 1140 } else 1141 spin_unlock(&lpfc_ncmd->buf_lock); 1142 1143 /* Call release with XB=1 to queue the IO into the abort list. */ 1144 lpfc_release_nvme_buf(phba, lpfc_ncmd); 1145 } 1146 1147 1148 /** 1149 * lpfc_nvme_prep_io_cmd - Issue an NVME-over-FCP IO 1150 * @vport: pointer to a host virtual N_Port data structure 1151 * @lpfc_ncmd: Pointer to lpfc scsi command 1152 * @pnode: pointer to a node-list data structure 1153 * @cstat: pointer to the control status structure 1154 * 1155 * Driver registers this routine as it io request handler. This 1156 * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq 1157 * data structure to the rport indicated in @lpfc_nvme_rport. 1158 * 1159 * Return value : 1160 * 0 - Success 1161 * TODO: What are the failure codes. 1162 **/ 1163 static int 1164 lpfc_nvme_prep_io_cmd(struct lpfc_vport *vport, 1165 struct lpfc_io_buf *lpfc_ncmd, 1166 struct lpfc_nodelist *pnode, 1167 struct lpfc_fc4_ctrl_stat *cstat) 1168 { 1169 struct lpfc_hba *phba = vport->phba; 1170 struct nvmefc_fcp_req *nCmd = lpfc_ncmd->nvmeCmd; 1171 struct lpfc_iocbq *pwqeq = &(lpfc_ncmd->cur_iocbq); 1172 union lpfc_wqe128 *wqe = &pwqeq->wqe; 1173 uint32_t req_len; 1174 1175 /* 1176 * There are three possibilities here - use scatter-gather segment, use 1177 * the single mapping, or neither. 1178 */ 1179 if (nCmd->sg_cnt) { 1180 if (nCmd->io_dir == NVMEFC_FCP_WRITE) { 1181 /* From the iwrite template, initialize words 7 - 11 */ 1182 memcpy(&wqe->words[7], 1183 &lpfc_iwrite_cmd_template.words[7], 1184 sizeof(uint32_t) * 5); 1185 1186 /* Word 4 */ 1187 wqe->fcp_iwrite.total_xfer_len = nCmd->payload_length; 1188 1189 /* Word 5 */ 1190 if ((phba->cfg_nvme_enable_fb) && 1191 (pnode->nlp_flag & NLP_FIRSTBURST)) { 1192 req_len = lpfc_ncmd->nvmeCmd->payload_length; 1193 if (req_len < pnode->nvme_fb_size) 1194 wqe->fcp_iwrite.initial_xfer_len = 1195 req_len; 1196 else 1197 wqe->fcp_iwrite.initial_xfer_len = 1198 pnode->nvme_fb_size; 1199 } else { 1200 wqe->fcp_iwrite.initial_xfer_len = 0; 1201 } 1202 cstat->output_requests++; 1203 } else { 1204 /* From the iread template, initialize words 7 - 11 */ 1205 memcpy(&wqe->words[7], 1206 &lpfc_iread_cmd_template.words[7], 1207 sizeof(uint32_t) * 5); 1208 1209 /* Word 4 */ 1210 wqe->fcp_iread.total_xfer_len = nCmd->payload_length; 1211 1212 /* Word 5 */ 1213 wqe->fcp_iread.rsrvd5 = 0; 1214 1215 cstat->input_requests++; 1216 } 1217 } else { 1218 /* From the icmnd template, initialize words 4 - 11 */ 1219 memcpy(&wqe->words[4], &lpfc_icmnd_cmd_template.words[4], 1220 sizeof(uint32_t) * 8); 1221 cstat->control_requests++; 1222 } 1223 1224 if (pnode->nlp_nvme_info & NLP_NVME_NSLER) 1225 bf_set(wqe_erp, &wqe->generic.wqe_com, 1); 1226 /* 1227 * Finish initializing those WQE fields that are independent 1228 * of the nvme_cmnd request_buffer 1229 */ 1230 1231 /* Word 3 */ 1232 bf_set(payload_offset_len, &wqe->fcp_icmd, 1233 (nCmd->rsplen + nCmd->cmdlen)); 1234 1235 /* Word 6 */ 1236 bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com, 1237 phba->sli4_hba.rpi_ids[pnode->nlp_rpi]); 1238 bf_set(wqe_xri_tag, &wqe->generic.wqe_com, pwqeq->sli4_xritag); 1239 1240 /* Word 8 */ 1241 wqe->generic.wqe_com.abort_tag = pwqeq->iotag; 1242 1243 /* Word 9 */ 1244 bf_set(wqe_reqtag, &wqe->generic.wqe_com, pwqeq->iotag); 1245 1246 /* Word 10 */ 1247 bf_set(wqe_xchg, &wqe->fcp_iwrite.wqe_com, LPFC_NVME_XCHG); 1248 1249 /* Words 13 14 15 are for PBDE support */ 1250 1251 pwqeq->vport = vport; 1252 return 0; 1253 } 1254 1255 1256 /** 1257 * lpfc_nvme_prep_io_dma - Issue an NVME-over-FCP IO 1258 * @vport: pointer to a host virtual N_Port data structure 1259 * @lpfc_ncmd: Pointer to lpfc scsi command 1260 * 1261 * Driver registers this routine as it io request handler. This 1262 * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq 1263 * data structure to the rport indicated in @lpfc_nvme_rport. 1264 * 1265 * Return value : 1266 * 0 - Success 1267 * TODO: What are the failure codes. 1268 **/ 1269 static int 1270 lpfc_nvme_prep_io_dma(struct lpfc_vport *vport, 1271 struct lpfc_io_buf *lpfc_ncmd) 1272 { 1273 struct lpfc_hba *phba = vport->phba; 1274 struct nvmefc_fcp_req *nCmd = lpfc_ncmd->nvmeCmd; 1275 union lpfc_wqe128 *wqe = &lpfc_ncmd->cur_iocbq.wqe; 1276 struct sli4_sge *sgl = lpfc_ncmd->dma_sgl; 1277 struct sli4_hybrid_sgl *sgl_xtra = NULL; 1278 struct scatterlist *data_sg; 1279 struct sli4_sge *first_data_sgl; 1280 struct ulp_bde64 *bde; 1281 dma_addr_t physaddr = 0; 1282 uint32_t num_bde = 0; 1283 uint32_t dma_len = 0; 1284 uint32_t dma_offset = 0; 1285 int nseg, i, j; 1286 bool lsp_just_set = false; 1287 1288 /* Fix up the command and response DMA stuff. */ 1289 lpfc_nvme_adj_fcp_sgls(vport, lpfc_ncmd, nCmd); 1290 1291 /* 1292 * There are three possibilities here - use scatter-gather segment, use 1293 * the single mapping, or neither. 1294 */ 1295 if (nCmd->sg_cnt) { 1296 /* 1297 * Jump over the cmd and rsp SGEs. The fix routine 1298 * has already adjusted for this. 1299 */ 1300 sgl += 2; 1301 1302 first_data_sgl = sgl; 1303 lpfc_ncmd->seg_cnt = nCmd->sg_cnt; 1304 if (lpfc_ncmd->seg_cnt > lpfc_nvme_template.max_sgl_segments) { 1305 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT, 1306 "6058 Too many sg segments from " 1307 "NVME Transport. Max %d, " 1308 "nvmeIO sg_cnt %d\n", 1309 phba->cfg_nvme_seg_cnt + 1, 1310 lpfc_ncmd->seg_cnt); 1311 lpfc_ncmd->seg_cnt = 0; 1312 return 1; 1313 } 1314 1315 /* 1316 * The driver established a maximum scatter-gather segment count 1317 * during probe that limits the number of sg elements in any 1318 * single nvme command. Just run through the seg_cnt and format 1319 * the sge's. 1320 */ 1321 nseg = nCmd->sg_cnt; 1322 data_sg = nCmd->first_sgl; 1323 1324 /* for tracking the segment boundaries */ 1325 j = 2; 1326 for (i = 0; i < nseg; i++) { 1327 if (data_sg == NULL) { 1328 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT, 1329 "6059 dptr err %d, nseg %d\n", 1330 i, nseg); 1331 lpfc_ncmd->seg_cnt = 0; 1332 return 1; 1333 } 1334 1335 sgl->word2 = 0; 1336 if ((num_bde + 1) == nseg) { 1337 bf_set(lpfc_sli4_sge_last, sgl, 1); 1338 bf_set(lpfc_sli4_sge_type, sgl, 1339 LPFC_SGE_TYPE_DATA); 1340 } else { 1341 bf_set(lpfc_sli4_sge_last, sgl, 0); 1342 1343 /* expand the segment */ 1344 if (!lsp_just_set && 1345 !((j + 1) % phba->border_sge_num) && 1346 ((nseg - 1) != i)) { 1347 /* set LSP type */ 1348 bf_set(lpfc_sli4_sge_type, sgl, 1349 LPFC_SGE_TYPE_LSP); 1350 1351 sgl_xtra = lpfc_get_sgl_per_hdwq( 1352 phba, lpfc_ncmd); 1353 1354 if (unlikely(!sgl_xtra)) { 1355 lpfc_ncmd->seg_cnt = 0; 1356 return 1; 1357 } 1358 sgl->addr_lo = cpu_to_le32(putPaddrLow( 1359 sgl_xtra->dma_phys_sgl)); 1360 sgl->addr_hi = cpu_to_le32(putPaddrHigh( 1361 sgl_xtra->dma_phys_sgl)); 1362 1363 } else { 1364 bf_set(lpfc_sli4_sge_type, sgl, 1365 LPFC_SGE_TYPE_DATA); 1366 } 1367 } 1368 1369 if (!(bf_get(lpfc_sli4_sge_type, sgl) & 1370 LPFC_SGE_TYPE_LSP)) { 1371 if ((nseg - 1) == i) 1372 bf_set(lpfc_sli4_sge_last, sgl, 1); 1373 1374 physaddr = data_sg->dma_address; 1375 dma_len = data_sg->length; 1376 sgl->addr_lo = cpu_to_le32( 1377 putPaddrLow(physaddr)); 1378 sgl->addr_hi = cpu_to_le32( 1379 putPaddrHigh(physaddr)); 1380 1381 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset); 1382 sgl->word2 = cpu_to_le32(sgl->word2); 1383 sgl->sge_len = cpu_to_le32(dma_len); 1384 1385 dma_offset += dma_len; 1386 data_sg = sg_next(data_sg); 1387 1388 sgl++; 1389 1390 lsp_just_set = false; 1391 } else { 1392 sgl->word2 = cpu_to_le32(sgl->word2); 1393 1394 sgl->sge_len = cpu_to_le32( 1395 phba->cfg_sg_dma_buf_size); 1396 1397 sgl = (struct sli4_sge *)sgl_xtra->dma_sgl; 1398 i = i - 1; 1399 1400 lsp_just_set = true; 1401 } 1402 1403 j++; 1404 } 1405 if (phba->cfg_enable_pbde) { 1406 /* Use PBDE support for first SGL only, offset == 0 */ 1407 /* Words 13-15 */ 1408 bde = (struct ulp_bde64 *) 1409 &wqe->words[13]; 1410 bde->addrLow = first_data_sgl->addr_lo; 1411 bde->addrHigh = first_data_sgl->addr_hi; 1412 bde->tus.f.bdeSize = 1413 le32_to_cpu(first_data_sgl->sge_len); 1414 bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64; 1415 bde->tus.w = cpu_to_le32(bde->tus.w); 1416 1417 /* Word 11 */ 1418 bf_set(wqe_pbde, &wqe->generic.wqe_com, 1); 1419 } else { 1420 memset(&wqe->words[13], 0, (sizeof(uint32_t) * 3)); 1421 bf_set(wqe_pbde, &wqe->generic.wqe_com, 0); 1422 } 1423 1424 } else { 1425 lpfc_ncmd->seg_cnt = 0; 1426 1427 /* For this clause to be valid, the payload_length 1428 * and sg_cnt must zero. 1429 */ 1430 if (nCmd->payload_length != 0) { 1431 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT, 1432 "6063 NVME DMA Prep Err: sg_cnt %d " 1433 "payload_length x%x\n", 1434 nCmd->sg_cnt, nCmd->payload_length); 1435 return 1; 1436 } 1437 } 1438 return 0; 1439 } 1440 1441 /** 1442 * lpfc_nvme_fcp_io_submit - Issue an NVME-over-FCP IO 1443 * @pnvme_lport: Pointer to the driver's local port data 1444 * @pnvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq 1445 * @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue 1446 * @pnvme_fcreq: IO request from nvme fc to driver. 1447 * 1448 * Driver registers this routine as it io request handler. This 1449 * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq 1450 * data structure to the rport indicated in @lpfc_nvme_rport. 1451 * 1452 * Return value : 1453 * 0 - Success 1454 * TODO: What are the failure codes. 1455 **/ 1456 static int 1457 lpfc_nvme_fcp_io_submit(struct nvme_fc_local_port *pnvme_lport, 1458 struct nvme_fc_remote_port *pnvme_rport, 1459 void *hw_queue_handle, 1460 struct nvmefc_fcp_req *pnvme_fcreq) 1461 { 1462 int ret = 0; 1463 int expedite = 0; 1464 int idx, cpu; 1465 struct lpfc_nvme_lport *lport; 1466 struct lpfc_fc4_ctrl_stat *cstat; 1467 struct lpfc_vport *vport; 1468 struct lpfc_hba *phba; 1469 struct lpfc_nodelist *ndlp; 1470 struct lpfc_io_buf *lpfc_ncmd; 1471 struct lpfc_nvme_rport *rport; 1472 struct lpfc_nvme_qhandle *lpfc_queue_info; 1473 struct lpfc_nvme_fcpreq_priv *freqpriv; 1474 struct nvme_common_command *sqe; 1475 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 1476 uint64_t start = 0; 1477 #endif 1478 1479 /* Validate pointers. LLDD fault handling with transport does 1480 * have timing races. 1481 */ 1482 lport = (struct lpfc_nvme_lport *)pnvme_lport->private; 1483 if (unlikely(!lport)) { 1484 ret = -EINVAL; 1485 goto out_fail; 1486 } 1487 1488 vport = lport->vport; 1489 1490 if (unlikely(!hw_queue_handle)) { 1491 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR, 1492 "6117 Fail IO, NULL hw_queue_handle\n"); 1493 atomic_inc(&lport->xmt_fcp_err); 1494 ret = -EBUSY; 1495 goto out_fail; 1496 } 1497 1498 phba = vport->phba; 1499 1500 if (unlikely(vport->load_flag & FC_UNLOADING)) { 1501 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR, 1502 "6124 Fail IO, Driver unload\n"); 1503 atomic_inc(&lport->xmt_fcp_err); 1504 ret = -ENODEV; 1505 goto out_fail; 1506 } 1507 1508 freqpriv = pnvme_fcreq->private; 1509 if (unlikely(!freqpriv)) { 1510 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR, 1511 "6158 Fail IO, NULL request data\n"); 1512 atomic_inc(&lport->xmt_fcp_err); 1513 ret = -EINVAL; 1514 goto out_fail; 1515 } 1516 1517 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 1518 if (phba->ktime_on) 1519 start = ktime_get_ns(); 1520 #endif 1521 rport = (struct lpfc_nvme_rport *)pnvme_rport->private; 1522 lpfc_queue_info = (struct lpfc_nvme_qhandle *)hw_queue_handle; 1523 1524 /* 1525 * Catch race where our node has transitioned, but the 1526 * transport is still transitioning. 1527 */ 1528 ndlp = rport->ndlp; 1529 if (!ndlp) { 1530 lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE | LOG_NVME_IOERR, 1531 "6053 Busy IO, ndlp not ready: rport x%px " 1532 "ndlp x%px, DID x%06x\n", 1533 rport, ndlp, pnvme_rport->port_id); 1534 atomic_inc(&lport->xmt_fcp_err); 1535 ret = -EBUSY; 1536 goto out_fail; 1537 } 1538 1539 /* The remote node has to be a mapped target or it's an error. */ 1540 if ((ndlp->nlp_type & NLP_NVME_TARGET) && 1541 (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) { 1542 lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE | LOG_NVME_IOERR, 1543 "6036 Fail IO, DID x%06x not ready for " 1544 "IO. State x%x, Type x%x Flg x%x\n", 1545 pnvme_rport->port_id, 1546 ndlp->nlp_state, ndlp->nlp_type, 1547 ndlp->fc4_xpt_flags); 1548 atomic_inc(&lport->xmt_fcp_bad_ndlp); 1549 ret = -EBUSY; 1550 goto out_fail; 1551 1552 } 1553 1554 /* Currently only NVME Keep alive commands should be expedited 1555 * if the driver runs out of a resource. These should only be 1556 * issued on the admin queue, qidx 0 1557 */ 1558 if (!lpfc_queue_info->qidx && !pnvme_fcreq->sg_cnt) { 1559 sqe = &((struct nvme_fc_cmd_iu *) 1560 pnvme_fcreq->cmdaddr)->sqe.common; 1561 if (sqe->opcode == nvme_admin_keep_alive) 1562 expedite = 1; 1563 } 1564 1565 /* The node is shared with FCP IO, make sure the IO pending count does 1566 * not exceed the programmed depth. 1567 */ 1568 if (lpfc_ndlp_check_qdepth(phba, ndlp)) { 1569 if ((atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth) && 1570 !expedite) { 1571 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR, 1572 "6174 Fail IO, ndlp qdepth exceeded: " 1573 "idx %d DID %x pend %d qdepth %d\n", 1574 lpfc_queue_info->index, ndlp->nlp_DID, 1575 atomic_read(&ndlp->cmd_pending), 1576 ndlp->cmd_qdepth); 1577 atomic_inc(&lport->xmt_fcp_qdepth); 1578 ret = -EBUSY; 1579 goto out_fail; 1580 } 1581 } 1582 1583 /* Lookup Hardware Queue index based on fcp_io_sched module parameter */ 1584 if (phba->cfg_fcp_io_sched == LPFC_FCP_SCHED_BY_HDWQ) { 1585 idx = lpfc_queue_info->index; 1586 } else { 1587 cpu = raw_smp_processor_id(); 1588 idx = phba->sli4_hba.cpu_map[cpu].hdwq; 1589 } 1590 1591 lpfc_ncmd = lpfc_get_nvme_buf(phba, ndlp, idx, expedite); 1592 if (lpfc_ncmd == NULL) { 1593 atomic_inc(&lport->xmt_fcp_noxri); 1594 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR, 1595 "6065 Fail IO, driver buffer pool is empty: " 1596 "idx %d DID %x\n", 1597 lpfc_queue_info->index, ndlp->nlp_DID); 1598 ret = -EBUSY; 1599 goto out_fail; 1600 } 1601 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 1602 if (start) { 1603 lpfc_ncmd->ts_cmd_start = start; 1604 lpfc_ncmd->ts_last_cmd = phba->ktime_last_cmd; 1605 } else { 1606 lpfc_ncmd->ts_cmd_start = 0; 1607 } 1608 #endif 1609 1610 /* 1611 * Store the data needed by the driver to issue, abort, and complete 1612 * an IO. 1613 * Do not let the IO hang out forever. There is no midlayer issuing 1614 * an abort so inform the FW of the maximum IO pending time. 1615 */ 1616 freqpriv->nvme_buf = lpfc_ncmd; 1617 lpfc_ncmd->nvmeCmd = pnvme_fcreq; 1618 lpfc_ncmd->ndlp = ndlp; 1619 lpfc_ncmd->qidx = lpfc_queue_info->qidx; 1620 1621 /* 1622 * Issue the IO on the WQ indicated by index in the hw_queue_handle. 1623 * This identfier was create in our hardware queue create callback 1624 * routine. The driver now is dependent on the IO queue steering from 1625 * the transport. We are trusting the upper NVME layers know which 1626 * index to use and that they have affinitized a CPU to this hardware 1627 * queue. A hardware queue maps to a driver MSI-X vector/EQ/CQ/WQ. 1628 */ 1629 lpfc_ncmd->cur_iocbq.hba_wqidx = idx; 1630 cstat = &phba->sli4_hba.hdwq[idx].nvme_cstat; 1631 1632 lpfc_nvme_prep_io_cmd(vport, lpfc_ncmd, ndlp, cstat); 1633 ret = lpfc_nvme_prep_io_dma(vport, lpfc_ncmd); 1634 if (ret) { 1635 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR, 1636 "6175 Fail IO, Prep DMA: " 1637 "idx %d DID %x\n", 1638 lpfc_queue_info->index, ndlp->nlp_DID); 1639 atomic_inc(&lport->xmt_fcp_err); 1640 ret = -ENOMEM; 1641 goto out_free_nvme_buf; 1642 } 1643 1644 lpfc_nvmeio_data(phba, "NVME FCP XMIT: xri x%x idx %d to %06x\n", 1645 lpfc_ncmd->cur_iocbq.sli4_xritag, 1646 lpfc_queue_info->index, ndlp->nlp_DID); 1647 1648 ret = lpfc_sli4_issue_wqe(phba, lpfc_ncmd->hdwq, &lpfc_ncmd->cur_iocbq); 1649 if (ret) { 1650 atomic_inc(&lport->xmt_fcp_wqerr); 1651 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR, 1652 "6113 Fail IO, Could not issue WQE err %x " 1653 "sid: x%x did: x%x oxid: x%x\n", 1654 ret, vport->fc_myDID, ndlp->nlp_DID, 1655 lpfc_ncmd->cur_iocbq.sli4_xritag); 1656 goto out_free_nvme_buf; 1657 } 1658 1659 if (phba->cfg_xri_rebalancing) 1660 lpfc_keep_pvt_pool_above_lowwm(phba, lpfc_ncmd->hdwq_no); 1661 1662 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS 1663 if (lpfc_ncmd->ts_cmd_start) 1664 lpfc_ncmd->ts_cmd_wqput = ktime_get_ns(); 1665 1666 if (phba->hdwqstat_on & LPFC_CHECK_NVME_IO) { 1667 cpu = raw_smp_processor_id(); 1668 this_cpu_inc(phba->sli4_hba.c_stat->xmt_io); 1669 lpfc_ncmd->cpu = cpu; 1670 if (idx != cpu) 1671 lpfc_printf_vlog(vport, 1672 KERN_INFO, LOG_NVME_IOERR, 1673 "6702 CPU Check cmd: " 1674 "cpu %d wq %d\n", 1675 lpfc_ncmd->cpu, 1676 lpfc_queue_info->index); 1677 } 1678 #endif 1679 return 0; 1680 1681 out_free_nvme_buf: 1682 if (lpfc_ncmd->nvmeCmd->sg_cnt) { 1683 if (lpfc_ncmd->nvmeCmd->io_dir == NVMEFC_FCP_WRITE) 1684 cstat->output_requests--; 1685 else 1686 cstat->input_requests--; 1687 } else 1688 cstat->control_requests--; 1689 lpfc_release_nvme_buf(phba, lpfc_ncmd); 1690 out_fail: 1691 return ret; 1692 } 1693 1694 /** 1695 * lpfc_nvme_abort_fcreq_cmpl - Complete an NVME FCP abort request. 1696 * @phba: Pointer to HBA context object 1697 * @cmdiocb: Pointer to command iocb object. 1698 * @abts_cmpl: Pointer to wcqe complete object. 1699 * 1700 * This is the callback function for any NVME FCP IO that was aborted. 1701 * 1702 * Return value: 1703 * None 1704 **/ 1705 void 1706 lpfc_nvme_abort_fcreq_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb, 1707 struct lpfc_wcqe_complete *abts_cmpl) 1708 { 1709 lpfc_printf_log(phba, KERN_INFO, LOG_NVME, 1710 "6145 ABORT_XRI_CN completing on rpi x%x " 1711 "original iotag x%x, abort cmd iotag x%x " 1712 "req_tag x%x, status x%x, hwstatus x%x\n", 1713 cmdiocb->iocb.un.acxri.abortContextTag, 1714 cmdiocb->iocb.un.acxri.abortIoTag, 1715 cmdiocb->iotag, 1716 bf_get(lpfc_wcqe_c_request_tag, abts_cmpl), 1717 bf_get(lpfc_wcqe_c_status, abts_cmpl), 1718 bf_get(lpfc_wcqe_c_hw_status, abts_cmpl)); 1719 lpfc_sli_release_iocbq(phba, cmdiocb); 1720 } 1721 1722 /** 1723 * lpfc_nvme_fcp_abort - Issue an NVME-over-FCP ABTS 1724 * @pnvme_lport: Pointer to the driver's local port data 1725 * @pnvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq 1726 * @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue 1727 * @pnvme_fcreq: IO request from nvme fc to driver. 1728 * 1729 * Driver registers this routine as its nvme request io abort handler. This 1730 * routine issues an fcp Abort WQE with data from the @lpfc_nvme_fcpreq 1731 * data structure to the rport indicated in @lpfc_nvme_rport. This routine 1732 * is executed asynchronously - one the target is validated as "MAPPED" and 1733 * ready for IO, the driver issues the abort request and returns. 1734 * 1735 * Return value: 1736 * None 1737 **/ 1738 static void 1739 lpfc_nvme_fcp_abort(struct nvme_fc_local_port *pnvme_lport, 1740 struct nvme_fc_remote_port *pnvme_rport, 1741 void *hw_queue_handle, 1742 struct nvmefc_fcp_req *pnvme_fcreq) 1743 { 1744 struct lpfc_nvme_lport *lport; 1745 struct lpfc_vport *vport; 1746 struct lpfc_hba *phba; 1747 struct lpfc_io_buf *lpfc_nbuf; 1748 struct lpfc_iocbq *nvmereq_wqe; 1749 struct lpfc_nvme_fcpreq_priv *freqpriv; 1750 unsigned long flags; 1751 int ret_val; 1752 1753 /* Validate pointers. LLDD fault handling with transport does 1754 * have timing races. 1755 */ 1756 lport = (struct lpfc_nvme_lport *)pnvme_lport->private; 1757 if (unlikely(!lport)) 1758 return; 1759 1760 vport = lport->vport; 1761 1762 if (unlikely(!hw_queue_handle)) { 1763 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS, 1764 "6129 Fail Abort, HW Queue Handle NULL.\n"); 1765 return; 1766 } 1767 1768 phba = vport->phba; 1769 freqpriv = pnvme_fcreq->private; 1770 1771 if (unlikely(!freqpriv)) 1772 return; 1773 if (vport->load_flag & FC_UNLOADING) 1774 return; 1775 1776 /* Announce entry to new IO submit field. */ 1777 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS, 1778 "6002 Abort Request to rport DID x%06x " 1779 "for nvme_fc_req x%px\n", 1780 pnvme_rport->port_id, 1781 pnvme_fcreq); 1782 1783 /* If the hba is getting reset, this flag is set. It is 1784 * cleared when the reset is complete and rings reestablished. 1785 */ 1786 spin_lock_irqsave(&phba->hbalock, flags); 1787 /* driver queued commands are in process of being flushed */ 1788 if (phba->hba_flag & HBA_IOQ_FLUSH) { 1789 spin_unlock_irqrestore(&phba->hbalock, flags); 1790 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, 1791 "6139 Driver in reset cleanup - flushing " 1792 "NVME Req now. hba_flag x%x\n", 1793 phba->hba_flag); 1794 return; 1795 } 1796 1797 lpfc_nbuf = freqpriv->nvme_buf; 1798 if (!lpfc_nbuf) { 1799 spin_unlock_irqrestore(&phba->hbalock, flags); 1800 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, 1801 "6140 NVME IO req has no matching lpfc nvme " 1802 "io buffer. Skipping abort req.\n"); 1803 return; 1804 } else if (!lpfc_nbuf->nvmeCmd) { 1805 spin_unlock_irqrestore(&phba->hbalock, flags); 1806 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, 1807 "6141 lpfc NVME IO req has no nvme_fcreq " 1808 "io buffer. Skipping abort req.\n"); 1809 return; 1810 } 1811 nvmereq_wqe = &lpfc_nbuf->cur_iocbq; 1812 1813 /* Guard against IO completion being called at same time */ 1814 spin_lock(&lpfc_nbuf->buf_lock); 1815 1816 /* 1817 * The lpfc_nbuf and the mapped nvme_fcreq in the driver's 1818 * state must match the nvme_fcreq passed by the nvme 1819 * transport. If they don't match, it is likely the driver 1820 * has already completed the NVME IO and the nvme transport 1821 * has not seen it yet. 1822 */ 1823 if (lpfc_nbuf->nvmeCmd != pnvme_fcreq) { 1824 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, 1825 "6143 NVME req mismatch: " 1826 "lpfc_nbuf x%px nvmeCmd x%px, " 1827 "pnvme_fcreq x%px. Skipping Abort xri x%x\n", 1828 lpfc_nbuf, lpfc_nbuf->nvmeCmd, 1829 pnvme_fcreq, nvmereq_wqe->sli4_xritag); 1830 goto out_unlock; 1831 } 1832 1833 /* Don't abort IOs no longer on the pending queue. */ 1834 if (!(nvmereq_wqe->iocb_flag & LPFC_IO_ON_TXCMPLQ)) { 1835 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, 1836 "6142 NVME IO req x%px not queued - skipping " 1837 "abort req xri x%x\n", 1838 pnvme_fcreq, nvmereq_wqe->sli4_xritag); 1839 goto out_unlock; 1840 } 1841 1842 atomic_inc(&lport->xmt_fcp_abort); 1843 lpfc_nvmeio_data(phba, "NVME FCP ABORT: xri x%x idx %d to %06x\n", 1844 nvmereq_wqe->sli4_xritag, 1845 nvmereq_wqe->hba_wqidx, pnvme_rport->port_id); 1846 1847 /* Outstanding abort is in progress */ 1848 if (nvmereq_wqe->iocb_flag & LPFC_DRIVER_ABORTED) { 1849 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, 1850 "6144 Outstanding NVME I/O Abort Request " 1851 "still pending on nvme_fcreq x%px, " 1852 "lpfc_ncmd x%px xri x%x\n", 1853 pnvme_fcreq, lpfc_nbuf, 1854 nvmereq_wqe->sli4_xritag); 1855 goto out_unlock; 1856 } 1857 1858 ret_val = lpfc_sli4_issue_abort_iotag(phba, nvmereq_wqe, 1859 lpfc_nvme_abort_fcreq_cmpl); 1860 1861 spin_unlock(&lpfc_nbuf->buf_lock); 1862 spin_unlock_irqrestore(&phba->hbalock, flags); 1863 1864 /* Make sure HBA is alive */ 1865 lpfc_issue_hb_tmo(phba); 1866 1867 if (ret_val != WQE_SUCCESS) { 1868 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, 1869 "6137 Failed abts issue_wqe with status x%x " 1870 "for nvme_fcreq x%px.\n", 1871 ret_val, pnvme_fcreq); 1872 return; 1873 } 1874 1875 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS, 1876 "6138 Transport Abort NVME Request Issued for " 1877 "ox_id x%x\n", 1878 nvmereq_wqe->sli4_xritag); 1879 return; 1880 1881 out_unlock: 1882 spin_unlock(&lpfc_nbuf->buf_lock); 1883 spin_unlock_irqrestore(&phba->hbalock, flags); 1884 return; 1885 } 1886 1887 /* Declare and initialization an instance of the FC NVME template. */ 1888 static struct nvme_fc_port_template lpfc_nvme_template = { 1889 /* initiator-based functions */ 1890 .localport_delete = lpfc_nvme_localport_delete, 1891 .remoteport_delete = lpfc_nvme_remoteport_delete, 1892 .create_queue = lpfc_nvme_create_queue, 1893 .delete_queue = lpfc_nvme_delete_queue, 1894 .ls_req = lpfc_nvme_ls_req, 1895 .fcp_io = lpfc_nvme_fcp_io_submit, 1896 .ls_abort = lpfc_nvme_ls_abort, 1897 .fcp_abort = lpfc_nvme_fcp_abort, 1898 .xmt_ls_rsp = lpfc_nvme_xmt_ls_rsp, 1899 1900 .max_hw_queues = 1, 1901 .max_sgl_segments = LPFC_NVME_DEFAULT_SEGS, 1902 .max_dif_sgl_segments = LPFC_NVME_DEFAULT_SEGS, 1903 .dma_boundary = 0xFFFFFFFF, 1904 1905 /* Sizes of additional private data for data structures. 1906 * No use for the last two sizes at this time. 1907 */ 1908 .local_priv_sz = sizeof(struct lpfc_nvme_lport), 1909 .remote_priv_sz = sizeof(struct lpfc_nvme_rport), 1910 .lsrqst_priv_sz = 0, 1911 .fcprqst_priv_sz = sizeof(struct lpfc_nvme_fcpreq_priv), 1912 }; 1913 1914 /* 1915 * lpfc_get_nvme_buf - Get a nvme buffer from io_buf_list of the HBA 1916 * 1917 * This routine removes a nvme buffer from head of @hdwq io_buf_list 1918 * and returns to caller. 1919 * 1920 * Return codes: 1921 * NULL - Error 1922 * Pointer to lpfc_nvme_buf - Success 1923 **/ 1924 static struct lpfc_io_buf * 1925 lpfc_get_nvme_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp, 1926 int idx, int expedite) 1927 { 1928 struct lpfc_io_buf *lpfc_ncmd; 1929 struct lpfc_sli4_hdw_queue *qp; 1930 struct sli4_sge *sgl; 1931 struct lpfc_iocbq *pwqeq; 1932 union lpfc_wqe128 *wqe; 1933 1934 lpfc_ncmd = lpfc_get_io_buf(phba, NULL, idx, expedite); 1935 1936 if (lpfc_ncmd) { 1937 pwqeq = &(lpfc_ncmd->cur_iocbq); 1938 wqe = &pwqeq->wqe; 1939 1940 /* Setup key fields in buffer that may have been changed 1941 * if other protocols used this buffer. 1942 */ 1943 pwqeq->iocb_flag = LPFC_IO_NVME; 1944 pwqeq->wqe_cmpl = lpfc_nvme_io_cmd_wqe_cmpl; 1945 lpfc_ncmd->start_time = jiffies; 1946 lpfc_ncmd->flags = 0; 1947 1948 /* Rsp SGE will be filled in when we rcv an IO 1949 * from the NVME Layer to be sent. 1950 * The cmd is going to be embedded so we need a SKIP SGE. 1951 */ 1952 sgl = lpfc_ncmd->dma_sgl; 1953 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP); 1954 bf_set(lpfc_sli4_sge_last, sgl, 0); 1955 sgl->word2 = cpu_to_le32(sgl->word2); 1956 /* Fill in word 3 / sgl_len during cmd submission */ 1957 1958 /* Initialize 64 bytes only */ 1959 memset(wqe, 0, sizeof(union lpfc_wqe)); 1960 1961 if (lpfc_ndlp_check_qdepth(phba, ndlp)) { 1962 atomic_inc(&ndlp->cmd_pending); 1963 lpfc_ncmd->flags |= LPFC_SBUF_BUMP_QDEPTH; 1964 } 1965 1966 } else { 1967 qp = &phba->sli4_hba.hdwq[idx]; 1968 qp->empty_io_bufs++; 1969 } 1970 1971 return lpfc_ncmd; 1972 } 1973 1974 /** 1975 * lpfc_release_nvme_buf: Return a nvme buffer back to hba nvme buf list. 1976 * @phba: The Hba for which this call is being executed. 1977 * @lpfc_ncmd: The nvme buffer which is being released. 1978 * 1979 * This routine releases @lpfc_ncmd nvme buffer by adding it to tail of @phba 1980 * lpfc_io_buf_list list. For SLI4 XRI's are tied to the nvme buffer 1981 * and cannot be reused for at least RA_TOV amount of time if it was 1982 * aborted. 1983 **/ 1984 static void 1985 lpfc_release_nvme_buf(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_ncmd) 1986 { 1987 struct lpfc_sli4_hdw_queue *qp; 1988 unsigned long iflag = 0; 1989 1990 if ((lpfc_ncmd->flags & LPFC_SBUF_BUMP_QDEPTH) && lpfc_ncmd->ndlp) 1991 atomic_dec(&lpfc_ncmd->ndlp->cmd_pending); 1992 1993 lpfc_ncmd->ndlp = NULL; 1994 lpfc_ncmd->flags &= ~LPFC_SBUF_BUMP_QDEPTH; 1995 1996 qp = lpfc_ncmd->hdwq; 1997 if (unlikely(lpfc_ncmd->flags & LPFC_SBUF_XBUSY)) { 1998 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS, 1999 "6310 XB release deferred for " 2000 "ox_id x%x on reqtag x%x\n", 2001 lpfc_ncmd->cur_iocbq.sli4_xritag, 2002 lpfc_ncmd->cur_iocbq.iotag); 2003 2004 spin_lock_irqsave(&qp->abts_io_buf_list_lock, iflag); 2005 list_add_tail(&lpfc_ncmd->list, 2006 &qp->lpfc_abts_io_buf_list); 2007 qp->abts_nvme_io_bufs++; 2008 spin_unlock_irqrestore(&qp->abts_io_buf_list_lock, iflag); 2009 } else 2010 lpfc_release_io_buf(phba, (struct lpfc_io_buf *)lpfc_ncmd, qp); 2011 } 2012 2013 /** 2014 * lpfc_nvme_create_localport - Create/Bind an nvme localport instance. 2015 * @vport: the lpfc_vport instance requesting a localport. 2016 * 2017 * This routine is invoked to create an nvme localport instance to bind 2018 * to the nvme_fc_transport. It is called once during driver load 2019 * like lpfc_create_shost after all other services are initialized. 2020 * It requires a vport, vpi, and wwns at call time. Other localport 2021 * parameters are modified as the driver's FCID and the Fabric WWN 2022 * are established. 2023 * 2024 * Return codes 2025 * 0 - successful 2026 * -ENOMEM - no heap memory available 2027 * other values - from nvme registration upcall 2028 **/ 2029 int 2030 lpfc_nvme_create_localport(struct lpfc_vport *vport) 2031 { 2032 int ret = 0; 2033 struct lpfc_hba *phba = vport->phba; 2034 struct nvme_fc_port_info nfcp_info; 2035 struct nvme_fc_local_port *localport; 2036 struct lpfc_nvme_lport *lport; 2037 2038 /* Initialize this localport instance. The vport wwn usage ensures 2039 * that NPIV is accounted for. 2040 */ 2041 memset(&nfcp_info, 0, sizeof(struct nvme_fc_port_info)); 2042 nfcp_info.port_role = FC_PORT_ROLE_NVME_INITIATOR; 2043 nfcp_info.node_name = wwn_to_u64(vport->fc_nodename.u.wwn); 2044 nfcp_info.port_name = wwn_to_u64(vport->fc_portname.u.wwn); 2045 2046 /* We need to tell the transport layer + 1 because it takes page 2047 * alignment into account. When space for the SGL is allocated we 2048 * allocate + 3, one for cmd, one for rsp and one for this alignment 2049 */ 2050 lpfc_nvme_template.max_sgl_segments = phba->cfg_nvme_seg_cnt + 1; 2051 2052 /* Advertise how many hw queues we support based on cfg_hdw_queue, 2053 * which will not exceed cpu count. 2054 */ 2055 lpfc_nvme_template.max_hw_queues = phba->cfg_hdw_queue; 2056 2057 if (!IS_ENABLED(CONFIG_NVME_FC)) 2058 return ret; 2059 2060 /* localport is allocated from the stack, but the registration 2061 * call allocates heap memory as well as the private area. 2062 */ 2063 2064 ret = nvme_fc_register_localport(&nfcp_info, &lpfc_nvme_template, 2065 &vport->phba->pcidev->dev, &localport); 2066 if (!ret) { 2067 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME | LOG_NVME_DISC, 2068 "6005 Successfully registered local " 2069 "NVME port num %d, localP x%px, private " 2070 "x%px, sg_seg %d\n", 2071 localport->port_num, localport, 2072 localport->private, 2073 lpfc_nvme_template.max_sgl_segments); 2074 2075 /* Private is our lport size declared in the template. */ 2076 lport = (struct lpfc_nvme_lport *)localport->private; 2077 vport->localport = localport; 2078 lport->vport = vport; 2079 vport->nvmei_support = 1; 2080 2081 atomic_set(&lport->xmt_fcp_noxri, 0); 2082 atomic_set(&lport->xmt_fcp_bad_ndlp, 0); 2083 atomic_set(&lport->xmt_fcp_qdepth, 0); 2084 atomic_set(&lport->xmt_fcp_err, 0); 2085 atomic_set(&lport->xmt_fcp_wqerr, 0); 2086 atomic_set(&lport->xmt_fcp_abort, 0); 2087 atomic_set(&lport->xmt_ls_abort, 0); 2088 atomic_set(&lport->xmt_ls_err, 0); 2089 atomic_set(&lport->cmpl_fcp_xb, 0); 2090 atomic_set(&lport->cmpl_fcp_err, 0); 2091 atomic_set(&lport->cmpl_ls_xb, 0); 2092 atomic_set(&lport->cmpl_ls_err, 0); 2093 2094 atomic_set(&lport->fc4NvmeLsRequests, 0); 2095 atomic_set(&lport->fc4NvmeLsCmpls, 0); 2096 } 2097 2098 return ret; 2099 } 2100 2101 #if (IS_ENABLED(CONFIG_NVME_FC)) 2102 /* lpfc_nvme_lport_unreg_wait - Wait for the host to complete an lport unreg. 2103 * 2104 * The driver has to wait for the host nvme transport to callback 2105 * indicating the localport has successfully unregistered all 2106 * resources. Since this is an uninterruptible wait, loop every ten 2107 * seconds and print a message indicating no progress. 2108 * 2109 * An uninterruptible wait is used because of the risk of transport-to- 2110 * driver state mismatch. 2111 */ 2112 static void 2113 lpfc_nvme_lport_unreg_wait(struct lpfc_vport *vport, 2114 struct lpfc_nvme_lport *lport, 2115 struct completion *lport_unreg_cmp) 2116 { 2117 u32 wait_tmo; 2118 int ret, i, pending = 0; 2119 struct lpfc_sli_ring *pring; 2120 struct lpfc_hba *phba = vport->phba; 2121 struct lpfc_sli4_hdw_queue *qp; 2122 int abts_scsi, abts_nvme; 2123 2124 /* Host transport has to clean up and confirm requiring an indefinite 2125 * wait. Print a message if a 10 second wait expires and renew the 2126 * wait. This is unexpected. 2127 */ 2128 wait_tmo = msecs_to_jiffies(LPFC_NVME_WAIT_TMO * 1000); 2129 while (true) { 2130 ret = wait_for_completion_timeout(lport_unreg_cmp, wait_tmo); 2131 if (unlikely(!ret)) { 2132 pending = 0; 2133 abts_scsi = 0; 2134 abts_nvme = 0; 2135 for (i = 0; i < phba->cfg_hdw_queue; i++) { 2136 qp = &phba->sli4_hba.hdwq[i]; 2137 pring = qp->io_wq->pring; 2138 if (!pring) 2139 continue; 2140 pending += pring->txcmplq_cnt; 2141 abts_scsi += qp->abts_scsi_io_bufs; 2142 abts_nvme += qp->abts_nvme_io_bufs; 2143 } 2144 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, 2145 "6176 Lport x%px Localport x%px wait " 2146 "timed out. Pending %d [%d:%d]. " 2147 "Renewing.\n", 2148 lport, vport->localport, pending, 2149 abts_scsi, abts_nvme); 2150 continue; 2151 } 2152 break; 2153 } 2154 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR, 2155 "6177 Lport x%px Localport x%px Complete Success\n", 2156 lport, vport->localport); 2157 } 2158 #endif 2159 2160 /** 2161 * lpfc_nvme_destroy_localport - Destroy lpfc_nvme bound to nvme transport. 2162 * @vport: pointer to a host virtual N_Port data structure 2163 * 2164 * This routine is invoked to destroy all lports bound to the phba. 2165 * The lport memory was allocated by the nvme fc transport and is 2166 * released there. This routine ensures all rports bound to the 2167 * lport have been disconnected. 2168 * 2169 **/ 2170 void 2171 lpfc_nvme_destroy_localport(struct lpfc_vport *vport) 2172 { 2173 #if (IS_ENABLED(CONFIG_NVME_FC)) 2174 struct nvme_fc_local_port *localport; 2175 struct lpfc_nvme_lport *lport; 2176 int ret; 2177 DECLARE_COMPLETION_ONSTACK(lport_unreg_cmp); 2178 2179 if (vport->nvmei_support == 0) 2180 return; 2181 2182 localport = vport->localport; 2183 lport = (struct lpfc_nvme_lport *)localport->private; 2184 2185 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME, 2186 "6011 Destroying NVME localport x%px\n", 2187 localport); 2188 2189 /* lport's rport list is clear. Unregister 2190 * lport and release resources. 2191 */ 2192 lport->lport_unreg_cmp = &lport_unreg_cmp; 2193 ret = nvme_fc_unregister_localport(localport); 2194 2195 /* Wait for completion. This either blocks 2196 * indefinitely or succeeds 2197 */ 2198 lpfc_nvme_lport_unreg_wait(vport, lport, &lport_unreg_cmp); 2199 vport->localport = NULL; 2200 2201 /* Regardless of the unregister upcall response, clear 2202 * nvmei_support. All rports are unregistered and the 2203 * driver will clean up. 2204 */ 2205 vport->nvmei_support = 0; 2206 if (ret == 0) { 2207 lpfc_printf_vlog(vport, 2208 KERN_INFO, LOG_NVME_DISC, 2209 "6009 Unregistered lport Success\n"); 2210 } else { 2211 lpfc_printf_vlog(vport, 2212 KERN_INFO, LOG_NVME_DISC, 2213 "6010 Unregistered lport " 2214 "Failed, status x%x\n", 2215 ret); 2216 } 2217 #endif 2218 } 2219 2220 void 2221 lpfc_nvme_update_localport(struct lpfc_vport *vport) 2222 { 2223 #if (IS_ENABLED(CONFIG_NVME_FC)) 2224 struct nvme_fc_local_port *localport; 2225 struct lpfc_nvme_lport *lport; 2226 2227 localport = vport->localport; 2228 if (!localport) { 2229 lpfc_printf_vlog(vport, KERN_WARNING, LOG_NVME, 2230 "6710 Update NVME fail. No localport\n"); 2231 return; 2232 } 2233 lport = (struct lpfc_nvme_lport *)localport->private; 2234 if (!lport) { 2235 lpfc_printf_vlog(vport, KERN_WARNING, LOG_NVME, 2236 "6171 Update NVME fail. localP x%px, No lport\n", 2237 localport); 2238 return; 2239 } 2240 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME, 2241 "6012 Update NVME lport x%px did x%x\n", 2242 localport, vport->fc_myDID); 2243 2244 localport->port_id = vport->fc_myDID; 2245 if (localport->port_id == 0) 2246 localport->port_role = FC_PORT_ROLE_NVME_DISCOVERY; 2247 else 2248 localport->port_role = FC_PORT_ROLE_NVME_INITIATOR; 2249 2250 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC, 2251 "6030 bound lport x%px to DID x%06x\n", 2252 lport, localport->port_id); 2253 #endif 2254 } 2255 2256 int 2257 lpfc_nvme_register_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp) 2258 { 2259 #if (IS_ENABLED(CONFIG_NVME_FC)) 2260 int ret = 0; 2261 struct nvme_fc_local_port *localport; 2262 struct lpfc_nvme_lport *lport; 2263 struct lpfc_nvme_rport *rport; 2264 struct lpfc_nvme_rport *oldrport; 2265 struct nvme_fc_remote_port *remote_port; 2266 struct nvme_fc_port_info rpinfo; 2267 struct lpfc_nodelist *prev_ndlp = NULL; 2268 struct fc_rport *srport = ndlp->rport; 2269 2270 lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_NVME_DISC, 2271 "6006 Register NVME PORT. DID x%06x nlptype x%x\n", 2272 ndlp->nlp_DID, ndlp->nlp_type); 2273 2274 localport = vport->localport; 2275 if (!localport) 2276 return 0; 2277 2278 lport = (struct lpfc_nvme_lport *)localport->private; 2279 2280 /* NVME rports are not preserved across devloss. 2281 * Just register this instance. Note, rpinfo->dev_loss_tmo 2282 * is left 0 to indicate accept transport defaults. The 2283 * driver communicates port role capabilities consistent 2284 * with the PRLI response data. 2285 */ 2286 memset(&rpinfo, 0, sizeof(struct nvme_fc_port_info)); 2287 rpinfo.port_id = ndlp->nlp_DID; 2288 if (ndlp->nlp_type & NLP_NVME_TARGET) 2289 rpinfo.port_role |= FC_PORT_ROLE_NVME_TARGET; 2290 if (ndlp->nlp_type & NLP_NVME_INITIATOR) 2291 rpinfo.port_role |= FC_PORT_ROLE_NVME_INITIATOR; 2292 2293 if (ndlp->nlp_type & NLP_NVME_DISCOVERY) 2294 rpinfo.port_role |= FC_PORT_ROLE_NVME_DISCOVERY; 2295 2296 rpinfo.port_name = wwn_to_u64(ndlp->nlp_portname.u.wwn); 2297 rpinfo.node_name = wwn_to_u64(ndlp->nlp_nodename.u.wwn); 2298 if (srport) 2299 rpinfo.dev_loss_tmo = srport->dev_loss_tmo; 2300 else 2301 rpinfo.dev_loss_tmo = vport->cfg_devloss_tmo; 2302 2303 spin_lock_irq(&ndlp->lock); 2304 oldrport = lpfc_ndlp_get_nrport(ndlp); 2305 if (oldrport) { 2306 prev_ndlp = oldrport->ndlp; 2307 spin_unlock_irq(&ndlp->lock); 2308 } else { 2309 spin_unlock_irq(&ndlp->lock); 2310 if (!lpfc_nlp_get(ndlp)) { 2311 dev_warn(&vport->phba->pcidev->dev, 2312 "Warning - No node ref - exit register\n"); 2313 return 0; 2314 } 2315 } 2316 2317 ret = nvme_fc_register_remoteport(localport, &rpinfo, &remote_port); 2318 if (!ret) { 2319 /* If the ndlp already has an nrport, this is just 2320 * a resume of the existing rport. Else this is a 2321 * new rport. 2322 */ 2323 /* Guard against an unregister/reregister 2324 * race that leaves the WAIT flag set. 2325 */ 2326 spin_lock_irq(&ndlp->lock); 2327 ndlp->fc4_xpt_flags &= ~NLP_WAIT_FOR_UNREG; 2328 ndlp->fc4_xpt_flags |= NVME_XPT_REGD; 2329 spin_unlock_irq(&ndlp->lock); 2330 rport = remote_port->private; 2331 if (oldrport) { 2332 2333 /* Sever the ndlp<->rport association 2334 * before dropping the ndlp ref from 2335 * register. 2336 */ 2337 spin_lock_irq(&ndlp->lock); 2338 ndlp->nrport = NULL; 2339 ndlp->fc4_xpt_flags &= ~NLP_WAIT_FOR_UNREG; 2340 spin_unlock_irq(&ndlp->lock); 2341 rport->ndlp = NULL; 2342 rport->remoteport = NULL; 2343 2344 /* Reference only removed if previous NDLP is no longer 2345 * active. It might be just a swap and removing the 2346 * reference would cause a premature cleanup. 2347 */ 2348 if (prev_ndlp && prev_ndlp != ndlp) { 2349 if (!prev_ndlp->nrport) 2350 lpfc_nlp_put(prev_ndlp); 2351 } 2352 } 2353 2354 /* Clean bind the rport to the ndlp. */ 2355 rport->remoteport = remote_port; 2356 rport->lport = lport; 2357 rport->ndlp = ndlp; 2358 spin_lock_irq(&ndlp->lock); 2359 ndlp->nrport = rport; 2360 spin_unlock_irq(&ndlp->lock); 2361 lpfc_printf_vlog(vport, KERN_INFO, 2362 LOG_NVME_DISC | LOG_NODE, 2363 "6022 Bind lport x%px to remoteport x%px " 2364 "rport x%px WWNN 0x%llx, " 2365 "Rport WWPN 0x%llx DID " 2366 "x%06x Role x%x, ndlp %p prev_ndlp x%px\n", 2367 lport, remote_port, rport, 2368 rpinfo.node_name, rpinfo.port_name, 2369 rpinfo.port_id, rpinfo.port_role, 2370 ndlp, prev_ndlp); 2371 } else { 2372 lpfc_printf_vlog(vport, KERN_ERR, 2373 LOG_TRACE_EVENT, 2374 "6031 RemotePort Registration failed " 2375 "err: %d, DID x%06x\n", 2376 ret, ndlp->nlp_DID); 2377 } 2378 2379 return ret; 2380 #else 2381 return 0; 2382 #endif 2383 } 2384 2385 /* 2386 * lpfc_nvme_rescan_port - Check to see if we should rescan this remoteport 2387 * 2388 * If the ndlp represents an NVME Target, that we are logged into, 2389 * ping the NVME FC Transport layer to initiate a device rescan 2390 * on this remote NPort. 2391 */ 2392 void 2393 lpfc_nvme_rescan_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp) 2394 { 2395 #if (IS_ENABLED(CONFIG_NVME_FC)) 2396 struct lpfc_nvme_rport *nrport; 2397 struct nvme_fc_remote_port *remoteport = NULL; 2398 2399 spin_lock_irq(&ndlp->lock); 2400 nrport = lpfc_ndlp_get_nrport(ndlp); 2401 if (nrport) 2402 remoteport = nrport->remoteport; 2403 spin_unlock_irq(&ndlp->lock); 2404 2405 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC, 2406 "6170 Rescan NPort DID x%06x type x%x " 2407 "state x%x nrport x%px remoteport x%px\n", 2408 ndlp->nlp_DID, ndlp->nlp_type, ndlp->nlp_state, 2409 nrport, remoteport); 2410 2411 if (!nrport || !remoteport) 2412 goto rescan_exit; 2413 2414 /* Only rescan if we are an NVME target in the MAPPED state */ 2415 if (remoteport->port_role & FC_PORT_ROLE_NVME_DISCOVERY && 2416 ndlp->nlp_state == NLP_STE_MAPPED_NODE) { 2417 nvme_fc_rescan_remoteport(remoteport); 2418 2419 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, 2420 "6172 NVME rescanned DID x%06x " 2421 "port_state x%x\n", 2422 ndlp->nlp_DID, remoteport->port_state); 2423 } 2424 return; 2425 rescan_exit: 2426 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC, 2427 "6169 Skip NVME Rport Rescan, NVME remoteport " 2428 "unregistered\n"); 2429 #endif 2430 } 2431 2432 /* lpfc_nvme_unregister_port - unbind the DID and port_role from this rport. 2433 * 2434 * There is no notion of Devloss or rport recovery from the current 2435 * nvme_transport perspective. Loss of an rport just means IO cannot 2436 * be sent and recovery is completely up to the initator. 2437 * For now, the driver just unbinds the DID and port_role so that 2438 * no further IO can be issued. Changes are planned for later. 2439 * 2440 * Notes - the ndlp reference count is not decremented here since 2441 * since there is no nvme_transport api for devloss. Node ref count 2442 * is only adjusted in driver unload. 2443 */ 2444 void 2445 lpfc_nvme_unregister_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp) 2446 { 2447 #if (IS_ENABLED(CONFIG_NVME_FC)) 2448 int ret; 2449 struct nvme_fc_local_port *localport; 2450 struct lpfc_nvme_lport *lport; 2451 struct lpfc_nvme_rport *rport; 2452 struct nvme_fc_remote_port *remoteport = NULL; 2453 2454 localport = vport->localport; 2455 2456 /* This is fundamental error. The localport is always 2457 * available until driver unload. Just exit. 2458 */ 2459 if (!localport) 2460 return; 2461 2462 lport = (struct lpfc_nvme_lport *)localport->private; 2463 if (!lport) 2464 goto input_err; 2465 2466 spin_lock_irq(&ndlp->lock); 2467 rport = lpfc_ndlp_get_nrport(ndlp); 2468 if (rport) 2469 remoteport = rport->remoteport; 2470 spin_unlock_irq(&ndlp->lock); 2471 if (!remoteport) 2472 goto input_err; 2473 2474 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC, 2475 "6033 Unreg nvme remoteport x%px, portname x%llx, " 2476 "port_id x%06x, portstate x%x port type x%x " 2477 "refcnt %d\n", 2478 remoteport, remoteport->port_name, 2479 remoteport->port_id, remoteport->port_state, 2480 ndlp->nlp_type, kref_read(&ndlp->kref)); 2481 2482 /* Sanity check ndlp type. Only call for NVME ports. Don't 2483 * clear any rport state until the transport calls back. 2484 */ 2485 2486 if (ndlp->nlp_type & NLP_NVME_TARGET) { 2487 /* No concern about the role change on the nvme remoteport. 2488 * The transport will update it. 2489 */ 2490 spin_lock_irq(&vport->phba->hbalock); 2491 ndlp->fc4_xpt_flags |= NLP_WAIT_FOR_UNREG; 2492 spin_unlock_irq(&vport->phba->hbalock); 2493 2494 /* Don't let the host nvme transport keep sending keep-alives 2495 * on this remoteport. Vport is unloading, no recovery. The 2496 * return values is ignored. The upcall is a courtesy to the 2497 * transport. 2498 */ 2499 if (vport->load_flag & FC_UNLOADING) 2500 (void)nvme_fc_set_remoteport_devloss(remoteport, 0); 2501 2502 ret = nvme_fc_unregister_remoteport(remoteport); 2503 2504 /* The driver no longer knows if the nrport memory is valid. 2505 * because the controller teardown process has begun and 2506 * is asynchronous. Break the binding in the ndlp. Also 2507 * remove the register ndlp reference to setup node release. 2508 */ 2509 ndlp->nrport = NULL; 2510 lpfc_nlp_put(ndlp); 2511 if (ret != 0) { 2512 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, 2513 "6167 NVME unregister failed %d " 2514 "port_state x%x\n", 2515 ret, remoteport->port_state); 2516 } 2517 } 2518 return; 2519 2520 input_err: 2521 #endif 2522 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT, 2523 "6168 State error: lport x%px, rport x%px FCID x%06x\n", 2524 vport->localport, ndlp->rport, ndlp->nlp_DID); 2525 } 2526 2527 /** 2528 * lpfc_sli4_nvme_xri_aborted - Fast-path process of NVME xri abort 2529 * @phba: pointer to lpfc hba data structure. 2530 * @axri: pointer to the fcp xri abort wcqe structure. 2531 * @lpfc_ncmd: The nvme job structure for the request being aborted. 2532 * 2533 * This routine is invoked by the worker thread to process a SLI4 fast-path 2534 * NVME aborted xri. Aborted NVME IO commands are completed to the transport 2535 * here. 2536 **/ 2537 void 2538 lpfc_sli4_nvme_xri_aborted(struct lpfc_hba *phba, 2539 struct sli4_wcqe_xri_aborted *axri, 2540 struct lpfc_io_buf *lpfc_ncmd) 2541 { 2542 uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri); 2543 struct nvmefc_fcp_req *nvme_cmd = NULL; 2544 struct lpfc_nodelist *ndlp = lpfc_ncmd->ndlp; 2545 2546 2547 if (ndlp) 2548 lpfc_sli4_abts_err_handler(phba, ndlp, axri); 2549 2550 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS, 2551 "6311 nvme_cmd %p xri x%x tag x%x abort complete and " 2552 "xri released\n", 2553 lpfc_ncmd->nvmeCmd, xri, 2554 lpfc_ncmd->cur_iocbq.iotag); 2555 2556 /* Aborted NVME commands are required to not complete 2557 * before the abort exchange command fully completes. 2558 * Once completed, it is available via the put list. 2559 */ 2560 if (lpfc_ncmd->nvmeCmd) { 2561 nvme_cmd = lpfc_ncmd->nvmeCmd; 2562 nvme_cmd->done(nvme_cmd); 2563 lpfc_ncmd->nvmeCmd = NULL; 2564 } 2565 lpfc_release_nvme_buf(phba, lpfc_ncmd); 2566 } 2567 2568 /** 2569 * lpfc_nvme_wait_for_io_drain - Wait for all NVME wqes to complete 2570 * @phba: Pointer to HBA context object. 2571 * 2572 * This function flushes all wqes in the nvme rings and frees all resources 2573 * in the txcmplq. This function does not issue abort wqes for the IO 2574 * commands in txcmplq, they will just be returned with 2575 * IOERR_SLI_DOWN. This function is invoked with EEH when device's PCI 2576 * slot has been permanently disabled. 2577 **/ 2578 void 2579 lpfc_nvme_wait_for_io_drain(struct lpfc_hba *phba) 2580 { 2581 struct lpfc_sli_ring *pring; 2582 u32 i, wait_cnt = 0; 2583 2584 if (phba->sli_rev < LPFC_SLI_REV4 || !phba->sli4_hba.hdwq) 2585 return; 2586 2587 /* Cycle through all IO rings and make sure all outstanding 2588 * WQEs have been removed from the txcmplqs. 2589 */ 2590 for (i = 0; i < phba->cfg_hdw_queue; i++) { 2591 if (!phba->sli4_hba.hdwq[i].io_wq) 2592 continue; 2593 pring = phba->sli4_hba.hdwq[i].io_wq->pring; 2594 2595 if (!pring) 2596 continue; 2597 2598 /* Retrieve everything on the txcmplq */ 2599 while (!list_empty(&pring->txcmplq)) { 2600 msleep(LPFC_XRI_EXCH_BUSY_WAIT_T1); 2601 wait_cnt++; 2602 2603 /* The sleep is 10mS. Every ten seconds, 2604 * dump a message. Something is wrong. 2605 */ 2606 if ((wait_cnt % 1000) == 0) { 2607 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT, 2608 "6178 NVME IO not empty, " 2609 "cnt %d\n", wait_cnt); 2610 } 2611 } 2612 } 2613 2614 /* Make sure HBA is alive */ 2615 lpfc_issue_hb_tmo(phba); 2616 2617 } 2618 2619 void 2620 lpfc_nvme_cancel_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *pwqeIn, 2621 uint32_t stat, uint32_t param) 2622 { 2623 #if (IS_ENABLED(CONFIG_NVME_FC)) 2624 struct lpfc_io_buf *lpfc_ncmd; 2625 struct nvmefc_fcp_req *nCmd; 2626 struct lpfc_wcqe_complete wcqe; 2627 struct lpfc_wcqe_complete *wcqep = &wcqe; 2628 2629 lpfc_ncmd = (struct lpfc_io_buf *)pwqeIn->context1; 2630 if (!lpfc_ncmd) { 2631 lpfc_sli_release_iocbq(phba, pwqeIn); 2632 return; 2633 } 2634 /* For abort iocb just return, IO iocb will do a done call */ 2635 if (bf_get(wqe_cmnd, &pwqeIn->wqe.gen_req.wqe_com) == 2636 CMD_ABORT_XRI_CX) { 2637 lpfc_sli_release_iocbq(phba, pwqeIn); 2638 return; 2639 } 2640 2641 spin_lock(&lpfc_ncmd->buf_lock); 2642 nCmd = lpfc_ncmd->nvmeCmd; 2643 if (!nCmd) { 2644 spin_unlock(&lpfc_ncmd->buf_lock); 2645 lpfc_release_nvme_buf(phba, lpfc_ncmd); 2646 return; 2647 } 2648 spin_unlock(&lpfc_ncmd->buf_lock); 2649 2650 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR, 2651 "6194 NVME Cancel xri %x\n", 2652 lpfc_ncmd->cur_iocbq.sli4_xritag); 2653 2654 wcqep->word0 = 0; 2655 bf_set(lpfc_wcqe_c_status, wcqep, stat); 2656 wcqep->parameter = param; 2657 wcqep->word3 = 0; /* xb is 0 */ 2658 2659 /* Call release with XB=1 to queue the IO into the abort list. */ 2660 if (phba->sli.sli_flag & LPFC_SLI_ACTIVE) 2661 bf_set(lpfc_wcqe_c_xb, wcqep, 1); 2662 2663 (pwqeIn->wqe_cmpl)(phba, pwqeIn, wcqep); 2664 #endif 2665 } 2666