drivers/scsi/lpfc/lpfc_nvme.c

   1 /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Fibre Channel Host Bus Adapters.                                *
   4  * Copyright (C) 2017-2024 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
  97         if (!vport || test_bit(FC_UNLOADING, &vport->load_flag) ||
  98             vport->phba->hba_flag & HBA_IOQ_FLUSH)
  99                 return -ENODEV;
 100
 101         qhandle = kzalloc(sizeof(struct lpfc_nvme_qhandle), GFP_KERNEL);
 102         if (qhandle == NULL)
 103                 return -ENOMEM;
 104
 105         qhandle->cpu_id = raw_smp_processor_id();
 106         qhandle->qidx = qidx;
 107         /*
 108          * NVME qidx == 0 is the admin queue, so both admin queue
 109          * and first IO queue will use MSI-X vector and associated
 110          * EQ/CQ/WQ at index 0. After that they are sequentially assigned.
 111          */
 112         if (qidx) {
 113                 str = "IO ";  /* IO queue */
 114                 qhandle->index = ((qidx - 1) %
 115                         lpfc_nvme_template.max_hw_queues);
 116         } else {
 117                 str = "ADM";  /* Admin queue */
 118                 qhandle->index = qidx;
 119         }
 120
 121         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
 122                          "6073 Binding %s HdwQueue %d  (cpu %d) to "
 123                          "hdw_queue %d qhandle x%px\n", str,
 124                          qidx, qhandle->cpu_id, qhandle->index, qhandle);
 125         *handle = (void *)qhandle;
 126         return 0;
 127 }
 128
 129 /**
 130  * lpfc_nvme_delete_queue -
 131  * @pnvme_lport: Transport localport that LS is to be issued from
 132  * @qidx: An cpu index used to affinitize IO queues and MSIX vectors.
 133  * @handle: An opaque driver handle from lpfc_nvme_create_queue
 134  *
 135  * Driver registers this routine to free
 136  * any internal data structures to bind the @qidx to its internal
 137  * IO queues.
 138  *
 139  * Return value :
 140  *   0 - Success
 141  *   TODO:  What are the failure codes.
 142  **/
 143 static void
 144 lpfc_nvme_delete_queue(struct nvme_fc_local_port *pnvme_lport,
 145                        unsigned int qidx,
 146                        void *handle)
 147 {
 148         struct lpfc_nvme_lport *lport;
 149         struct lpfc_vport *vport;
 150
 151         if (!pnvme_lport->private)
 152                 return;
 153
 154         lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
 155         vport = lport->vport;
 156
 157         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
 158                         "6001 ENTER.  lpfc_pnvme x%px, qidx x%x qhandle x%px\n",
 159                         lport, qidx, handle);
 160         kfree(handle);
 161 }
 162
 163 static void
 164 lpfc_nvme_localport_delete(struct nvme_fc_local_port *localport)
 165 {
 166         struct lpfc_nvme_lport *lport = localport->private;
 167
 168         lpfc_printf_vlog(lport->vport, KERN_INFO, LOG_NVME,
 169                          "6173 localport x%px delete complete\n",
 170                          lport);
 171
 172         /* release any threads waiting for the unreg to complete */
 173         if (lport->vport->localport)
 174                 complete(lport->lport_unreg_cmp);
 175 }
 176
 177 /* lpfc_nvme_remoteport_delete
 178  *
 179  * @remoteport: Pointer to an nvme transport remoteport instance.
 180  *
 181  * This is a template downcall.  NVME transport calls this function
 182  * when it has completed the unregistration of a previously
 183  * registered remoteport.
 184  *
 185  * Return value :
 186  * None
 187  */
 188 static void
 189 lpfc_nvme_remoteport_delete(struct nvme_fc_remote_port *remoteport)
 190 {
 191         struct lpfc_nvme_rport *rport = remoteport->private;
 192         struct lpfc_vport *vport;
 193         struct lpfc_nodelist *ndlp;
 194         u32 fc4_xpt_flags;
 195
 196         ndlp = rport->ndlp;
 197         if (!ndlp) {
 198                 pr_err("**** %s: NULL ndlp on rport x%px remoteport x%px\n",
 199                        __func__, rport, remoteport);
 200                 goto rport_err;
 201         }
 202
 203         vport = ndlp->vport;
 204         if (!vport) {
 205                 pr_err("**** %s: Null vport on ndlp x%px, ste x%x rport x%px\n",
 206                        __func__, ndlp, ndlp->nlp_state, rport);
 207                 goto rport_err;
 208         }
 209
 210         fc4_xpt_flags = NVME_XPT_REGD | SCSI_XPT_REGD;
 211
 212         /* Remove this rport from the lport's list - memory is owned by the
 213          * transport. Remove the ndlp reference for the NVME transport before
 214          * calling state machine to remove the node.
 215          */
 216         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
 217                          "6146 remoteport delete of remoteport x%px, ndlp x%px "
 218                          "DID x%x xflags x%x\n",
 219                          remoteport, ndlp, ndlp->nlp_DID, ndlp->fc4_xpt_flags);
 220         spin_lock_irq(&ndlp->lock);
 221
 222         /* The register rebind might have occurred before the delete
 223          * downcall.  Guard against this race.
 224          */
 225         if (ndlp->fc4_xpt_flags & NVME_XPT_UNREG_WAIT)
 226                 ndlp->fc4_xpt_flags &= ~(NVME_XPT_UNREG_WAIT | NVME_XPT_REGD);
 227
 228         spin_unlock_irq(&ndlp->lock);
 229
 230         /* On a devloss timeout event, one more put is executed provided the
 231          * NVME and SCSI rport unregister requests are complete.
 232          */
 233         if (!(ndlp->fc4_xpt_flags & fc4_xpt_flags))
 234                 lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM);
 235
 236  rport_err:
 237         return;
 238 }
 239
 240 /**
 241  * lpfc_nvme_handle_lsreq - Process an unsolicited NVME LS request
 242  * @phba: pointer to lpfc hba data structure.
 243  * @axchg: pointer to exchange context for the NVME LS request
 244  *
 245  * This routine is used for processing an asychronously received NVME LS
 246  * request. Any remaining validation is done and the LS is then forwarded
 247  * to the nvme-fc transport via nvme_fc_rcv_ls_req().
 248  *
 249  * The calling sequence should be: nvme_fc_rcv_ls_req() -> (processing)
 250  * -> lpfc_nvme_xmt_ls_rsp/cmp -> req->done.
 251  * __lpfc_nvme_xmt_ls_rsp_cmp should free the allocated axchg.
 252  *
 253  * Returns 0 if LS was handled and delivered to the transport
 254  * Returns 1 if LS failed to be handled and should be dropped
 255  */
 256 int
 257 lpfc_nvme_handle_lsreq(struct lpfc_hba *phba,
 258                         struct lpfc_async_xchg_ctx *axchg)
 259 {
 260 #if (IS_ENABLED(CONFIG_NVME_FC))
 261         struct lpfc_vport *vport;
 262         struct lpfc_nvme_rport *lpfc_rport;
 263         struct nvme_fc_remote_port *remoteport;
 264         struct lpfc_nvme_lport *lport;
 265         uint32_t *payload = axchg->payload;
 266         int rc;
 267
 268         vport = axchg->ndlp->vport;
 269         lpfc_rport = axchg->ndlp->nrport;
 270         if (!lpfc_rport)
 271                 return -EINVAL;
 272
 273         remoteport = lpfc_rport->remoteport;
 274         if (!vport->localport ||
 275             vport->phba->hba_flag & HBA_IOQ_FLUSH)
 276                 return -EINVAL;
 277
 278         lport = vport->localport->private;
 279         if (!lport)
 280                 return -EINVAL;
 281
 282         rc = nvme_fc_rcv_ls_req(remoteport, &axchg->ls_rsp, axchg->payload,
 283                                 axchg->size);
 284
 285         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
 286                         "6205 NVME Unsol rcv: sz %d rc %d: %08x %08x %08x "
 287                         "%08x %08x %08x\n",
 288                         axchg->size, rc,
 289                         *payload, *(payload+1), *(payload+2),
 290                         *(payload+3), *(payload+4), *(payload+5));
 291
 292         if (!rc)
 293                 return 0;
 294 #endif
 295         return 1;
 296 }
 297
 298 /**
 299  * __lpfc_nvme_ls_req_cmp - Generic completion handler for a NVME
 300  *        LS request.
 301  * @phba: Pointer to HBA context object
 302  * @vport: The local port that issued the LS
 303  * @cmdwqe: Pointer to driver command WQE object.
 304  * @wcqe: Pointer to driver response CQE object.
 305  *
 306  * This function is the generic completion handler for NVME LS requests.
 307  * The function updates any states and statistics, calls the transport
 308  * ls_req done() routine, then tears down the command and buffers used
 309  * for the LS request.
 310  **/
 311 void
 312 __lpfc_nvme_ls_req_cmp(struct lpfc_hba *phba, struct lpfc_vport *vport,
 313                         struct lpfc_iocbq *cmdwqe,
 314                         struct lpfc_wcqe_complete *wcqe)
 315 {
 316         struct nvmefc_ls_req *pnvme_lsreq;
 317         struct lpfc_dmabuf *buf_ptr;
 318         struct lpfc_nodelist *ndlp;
 319         int status;
 320
 321         pnvme_lsreq = cmdwqe->context_un.nvme_lsreq;
 322         ndlp = cmdwqe->ndlp;
 323         buf_ptr = cmdwqe->bpl_dmabuf;
 324
 325         status = bf_get(lpfc_wcqe_c_status, wcqe);
 326
 327         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
 328                          "6047 NVMEx LS REQ x%px cmpl DID %x Xri: %x "
 329                          "status %x reason x%x cmd:x%px lsreg:x%px bmp:x%px "
 330                          "ndlp:x%px\n",
 331                          pnvme_lsreq, ndlp ? ndlp->nlp_DID : 0,
 332                          cmdwqe->sli4_xritag, status,
 333                          (wcqe->parameter & 0xffff),
 334                          cmdwqe, pnvme_lsreq, cmdwqe->bpl_dmabuf,
 335                          ndlp);
 336
 337         lpfc_nvmeio_data(phba, "NVMEx LS CMPL: xri x%x stat x%x parm x%x\n",
 338                          cmdwqe->sli4_xritag, status, wcqe->parameter);
 339
 340         if (buf_ptr) {
 341                 lpfc_mbuf_free(phba, buf_ptr->virt, buf_ptr->phys);
 342                 kfree(buf_ptr);
 343                 cmdwqe->bpl_dmabuf = NULL;
 344         }
 345         if (pnvme_lsreq->done) {
 346                 if (status != CQE_STATUS_SUCCESS)
 347                         status = -ENXIO;
 348                 pnvme_lsreq->done(pnvme_lsreq, status);
 349         } else {
 350                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
 351                                  "6046 NVMEx cmpl without done call back? "
 352                                  "Data x%px DID %x Xri: %x status %x\n",
 353                                 pnvme_lsreq, ndlp ? ndlp->nlp_DID : 0,
 354                                 cmdwqe->sli4_xritag, status);
 355         }
 356         if (ndlp) {
 357                 lpfc_nlp_put(ndlp);
 358                 cmdwqe->ndlp = NULL;
 359         }
 360         lpfc_sli_release_iocbq(phba, cmdwqe);
 361 }
 362
 363 static void
 364 lpfc_nvme_ls_req_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
 365                      struct lpfc_iocbq *rspwqe)
 366 {
 367         struct lpfc_vport *vport = cmdwqe->vport;
 368         struct lpfc_nvme_lport *lport;
 369         uint32_t status;
 370         struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
 371
 372         status = bf_get(lpfc_wcqe_c_status, wcqe);
 373
 374         if (vport->localport) {
 375                 lport = (struct lpfc_nvme_lport *)vport->localport->private;
 376                 if (lport) {
 377                         atomic_inc(&lport->fc4NvmeLsCmpls);
 378                         if (status) {
 379                                 if (bf_get(lpfc_wcqe_c_xb, wcqe))
 380                                         atomic_inc(&lport->cmpl_ls_xb);
 381                                 atomic_inc(&lport->cmpl_ls_err);
 382                         }
 383                 }
 384         }
 385
 386         __lpfc_nvme_ls_req_cmp(phba, vport, cmdwqe, wcqe);
 387 }
 388
 389 static int
 390 lpfc_nvme_gen_req(struct lpfc_vport *vport, struct lpfc_dmabuf *bmp,
 391                   struct lpfc_dmabuf *inp,
 392                   struct nvmefc_ls_req *pnvme_lsreq,
 393                   void (*cmpl)(struct lpfc_hba *, struct lpfc_iocbq *,
 394                                struct lpfc_iocbq *),
 395                   struct lpfc_nodelist *ndlp, uint32_t num_entry,
 396                   uint32_t tmo, uint8_t retry)
 397 {
 398         struct lpfc_hba *phba = vport->phba;
 399         union lpfc_wqe128 *wqe;
 400         struct lpfc_iocbq *genwqe;
 401         struct ulp_bde64 *bpl;
 402         struct ulp_bde64 bde;
 403         int i, rc, xmit_len, first_len;
 404
 405         /* Allocate buffer for  command WQE */
 406         genwqe = lpfc_sli_get_iocbq(phba);
 407         if (genwqe == NULL)
 408                 return 1;
 409
 410         wqe = &genwqe->wqe;
 411         /* Initialize only 64 bytes */
 412         memset(wqe, 0, sizeof(union lpfc_wqe));
 413
 414         genwqe->bpl_dmabuf = bmp;
 415         genwqe->cmd_flag |= LPFC_IO_NVME_LS;
 416
 417         /* Save for completion so we can release these resources */
 418         genwqe->ndlp = lpfc_nlp_get(ndlp);
 419         if (!genwqe->ndlp) {
 420                 dev_warn(&phba->pcidev->dev,
 421                          "Warning: Failed node ref, not sending LS_REQ\n");
 422                 lpfc_sli_release_iocbq(phba, genwqe);
 423                 return 1;
 424         }
 425
 426         genwqe->context_un.nvme_lsreq = pnvme_lsreq;
 427         /* Fill in payload, bp points to frame payload */
 428
 429         if (!tmo)
 430                 /* FC spec states we need 3 * ratov for CT requests */
 431                 tmo = (3 * phba->fc_ratov);
 432
 433         /* For this command calculate the xmit length of the request bde. */
 434         xmit_len = 0;
 435         first_len = 0;
 436         bpl = (struct ulp_bde64 *)bmp->virt;
 437         for (i = 0; i < num_entry; i++) {
 438                 bde.tus.w = bpl[i].tus.w;
 439                 if (bde.tus.f.bdeFlags != BUFF_TYPE_BDE_64)
 440                         break;
 441                 xmit_len += bde.tus.f.bdeSize;
 442                 if (i == 0)
 443                         first_len = xmit_len;
 444         }
 445
 446         genwqe->num_bdes = num_entry;
 447         genwqe->hba_wqidx = 0;
 448
 449         /* Words 0 - 2 */
 450         wqe->generic.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 451         wqe->generic.bde.tus.f.bdeSize = first_len;
 452         wqe->generic.bde.addrLow = bpl[0].addrLow;
 453         wqe->generic.bde.addrHigh = bpl[0].addrHigh;
 454
 455         /* Word 3 */
 456         wqe->gen_req.request_payload_len = first_len;
 457
 458         /* Word 4 */
 459
 460         /* Word 5 */
 461         bf_set(wqe_dfctl, &wqe->gen_req.wge_ctl, 0);
 462         bf_set(wqe_si, &wqe->gen_req.wge_ctl, 1);
 463         bf_set(wqe_la, &wqe->gen_req.wge_ctl, 1);
 464         bf_set(wqe_rctl, &wqe->gen_req.wge_ctl, FC_RCTL_ELS4_REQ);
 465         bf_set(wqe_type, &wqe->gen_req.wge_ctl, FC_TYPE_NVME);
 466
 467         /* Word 6 */
 468         bf_set(wqe_ctxt_tag, &wqe->gen_req.wqe_com,
 469                phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
 470         bf_set(wqe_xri_tag, &wqe->gen_req.wqe_com, genwqe->sli4_xritag);
 471
 472         /* Word 7 */
 473         bf_set(wqe_tmo, &wqe->gen_req.wqe_com, tmo);
 474         bf_set(wqe_class, &wqe->gen_req.wqe_com, CLASS3);
 475         bf_set(wqe_cmnd, &wqe->gen_req.wqe_com, CMD_GEN_REQUEST64_WQE);
 476         bf_set(wqe_ct, &wqe->gen_req.wqe_com, SLI4_CT_RPI);
 477
 478         /* Word 8 */
 479         wqe->gen_req.wqe_com.abort_tag = genwqe->iotag;
 480
 481         /* Word 9 */
 482         bf_set(wqe_reqtag, &wqe->gen_req.wqe_com, genwqe->iotag);
 483
 484         /* Word 10 */
 485         bf_set(wqe_dbde, &wqe->gen_req.wqe_com, 1);
 486         bf_set(wqe_iod, &wqe->gen_req.wqe_com, LPFC_WQE_IOD_READ);
 487         bf_set(wqe_qosd, &wqe->gen_req.wqe_com, 1);
 488         bf_set(wqe_lenloc, &wqe->gen_req.wqe_com, LPFC_WQE_LENLOC_NONE);
 489         bf_set(wqe_ebde_cnt, &wqe->gen_req.wqe_com, 0);
 490
 491         /* Word 11 */
 492         bf_set(wqe_cqid, &wqe->gen_req.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
 493         bf_set(wqe_cmd_type, &wqe->gen_req.wqe_com, OTHER_COMMAND);
 494
 495
 496         /* Issue GEN REQ WQE for NPORT <did> */
 497         genwqe->cmd_cmpl = cmpl;
 498         genwqe->drvrTimeout = tmo + LPFC_DRVR_TIMEOUT;
 499         genwqe->vport = vport;
 500         genwqe->retry = retry;
 501
 502         lpfc_nvmeio_data(phba, "NVME LS  XMIT: xri x%x iotag x%x to x%06x\n",
 503                          genwqe->sli4_xritag, genwqe->iotag, ndlp->nlp_DID);
 504
 505         rc = lpfc_sli4_issue_wqe(phba, &phba->sli4_hba.hdwq[0], genwqe);
 506         if (rc) {
 507                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
 508                                  "6045 Issue GEN REQ WQE to NPORT x%x "
 509                                  "Data: x%x x%x  rc x%x\n",
 510                                  ndlp->nlp_DID, genwqe->iotag,
 511                                  vport->port_state, rc);
 512                 lpfc_nlp_put(ndlp);
 513                 lpfc_sli_release_iocbq(phba, genwqe);
 514                 return 1;
 515         }
 516
 517         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC | LOG_ELS,
 518                          "6050 Issue GEN REQ WQE to NPORT x%x "
 519                          "Data: oxid: x%x state: x%x wq:x%px lsreq:x%px "
 520                          "bmp:x%px xmit:%d 1st:%d\n",
 521                          ndlp->nlp_DID, genwqe->sli4_xritag,
 522                          vport->port_state,
 523                          genwqe, pnvme_lsreq, bmp, xmit_len, first_len);
 524         return 0;
 525 }
 526
 527
 528 /**
 529  * __lpfc_nvme_ls_req - Generic service routine to issue an NVME LS request
 530  * @vport: The local port issuing the LS
 531  * @ndlp: The remote port to send the LS to
 532  * @pnvme_lsreq: Pointer to LS request structure from the transport
 533  * @gen_req_cmp: Completion call-back
 534  *
 535  * Routine validates the ndlp, builds buffers and sends a GEN_REQUEST
 536  * WQE to perform the LS operation.
 537  *
 538  * Return value :
 539  *   0 - Success
 540  *   non-zero: various error codes, in form of -Exxx
 541  **/
 542 int
 543 __lpfc_nvme_ls_req(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 544                       struct nvmefc_ls_req *pnvme_lsreq,
 545                       void (*gen_req_cmp)(struct lpfc_hba *phba,
 546                                 struct lpfc_iocbq *cmdwqe,
 547                                 struct lpfc_iocbq *rspwqe))
 548 {
 549         struct lpfc_dmabuf *bmp;
 550         struct ulp_bde64 *bpl;
 551         int ret;
 552         uint16_t ntype, nstate;
 553
 554         if (!ndlp) {
 555                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
 556                                  "6051 NVMEx LS REQ: Bad NDLP x%px, Failing "
 557                                  "LS Req\n",
 558                                  ndlp);
 559                 return -ENODEV;
 560         }
 561
 562         ntype = ndlp->nlp_type;
 563         nstate = ndlp->nlp_state;
 564         if ((ntype & NLP_NVME_TARGET && nstate != NLP_STE_MAPPED_NODE) ||
 565             (ntype & NLP_NVME_INITIATOR && nstate != NLP_STE_UNMAPPED_NODE)) {
 566                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
 567                                  "6088 NVMEx LS REQ: Fail DID x%06x not "
 568                                  "ready for IO. Type x%x, State x%x\n",
 569                                  ndlp->nlp_DID, ntype, nstate);
 570                 return -ENODEV;
 571         }
 572         if (vport->phba->hba_flag & HBA_IOQ_FLUSH)
 573                 return -ENODEV;
 574
 575         if (!vport->phba->sli4_hba.nvmels_wq)
 576                 return -ENOMEM;
 577
 578         /*
 579          * there are two dma buf in the request, actually there is one and
 580          * the second one is just the start address + cmd size.
 581          * Before calling lpfc_nvme_gen_req these buffers need to be wrapped
 582          * in a lpfc_dmabuf struct. When freeing we just free the wrapper
 583          * because the nvem layer owns the data bufs.
 584          * We do not have to break these packets open, we don't care what is
 585          * in them. And we do not have to look at the resonse data, we only
 586          * care that we got a response. All of the caring is going to happen
 587          * in the nvme-fc layer.
 588          */
 589
 590         bmp = kmalloc(sizeof(*bmp), GFP_KERNEL);
 591         if (!bmp) {
 592                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
 593                                  "6044 NVMEx LS REQ: Could not alloc LS buf "
 594                                  "for DID %x\n",
 595                                  ndlp->nlp_DID);
 596                 return -ENOMEM;
 597         }
 598
 599         bmp->virt = lpfc_mbuf_alloc(vport->phba, MEM_PRI, &(bmp->phys));
 600         if (!bmp->virt) {
 601                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
 602                                  "6042 NVMEx LS REQ: Could not alloc mbuf "
 603                                  "for DID %x\n",
 604                                  ndlp->nlp_DID);
 605                 kfree(bmp);
 606                 return -ENOMEM;
 607         }
 608
 609         INIT_LIST_HEAD(&bmp->list);
 610
 611         bpl = (struct ulp_bde64 *)bmp->virt;
 612         bpl->addrHigh = le32_to_cpu(putPaddrHigh(pnvme_lsreq->rqstdma));
 613         bpl->addrLow = le32_to_cpu(putPaddrLow(pnvme_lsreq->rqstdma));
 614         bpl->tus.f.bdeFlags = 0;
 615         bpl->tus.f.bdeSize = pnvme_lsreq->rqstlen;
 616         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 617         bpl++;
 618
 619         bpl->addrHigh = le32_to_cpu(putPaddrHigh(pnvme_lsreq->rspdma));
 620         bpl->addrLow = le32_to_cpu(putPaddrLow(pnvme_lsreq->rspdma));
 621         bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
 622         bpl->tus.f.bdeSize = pnvme_lsreq->rsplen;
 623         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 624
 625         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
 626                         "6149 NVMEx LS REQ: Issue to DID 0x%06x lsreq x%px, "
 627                         "rqstlen:%d rsplen:%d %pad %pad\n",
 628                         ndlp->nlp_DID, pnvme_lsreq, pnvme_lsreq->rqstlen,
 629                         pnvme_lsreq->rsplen, &pnvme_lsreq->rqstdma,
 630                         &pnvme_lsreq->rspdma);
 631
 632         ret = lpfc_nvme_gen_req(vport, bmp, pnvme_lsreq->rqstaddr,
 633                                 pnvme_lsreq, gen_req_cmp, ndlp, 2,
 634                                 pnvme_lsreq->timeout, 0);
 635         if (ret != WQE_SUCCESS) {
 636                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
 637                                  "6052 NVMEx REQ: EXIT. issue ls wqe failed "
 638                                  "lsreq x%px Status %x DID %x\n",
 639                                  pnvme_lsreq, ret, ndlp->nlp_DID);
 640                 lpfc_mbuf_free(vport->phba, bmp->virt, bmp->phys);
 641                 kfree(bmp);
 642                 return -EIO;
 643         }
 644
 645         return 0;
 646 }
 647
 648 /**
 649  * lpfc_nvme_ls_req - Issue an NVME Link Service request
 650  * @pnvme_lport: Transport localport that LS is to be issued from.
 651  * @pnvme_rport: Transport remoteport that LS is to be sent to.
 652  * @pnvme_lsreq: the transport nvme_ls_req structure for the LS
 653  *
 654  * Driver registers this routine to handle any link service request
 655  * from the nvme_fc transport to a remote nvme-aware port.
 656  *
 657  * Return value :
 658  *   0 - Success
 659  *   non-zero: various error codes, in form of -Exxx
 660  **/
 661 static int
 662 lpfc_nvme_ls_req(struct nvme_fc_local_port *pnvme_lport,
 663                  struct nvme_fc_remote_port *pnvme_rport,
 664                  struct nvmefc_ls_req *pnvme_lsreq)
 665 {
 666         struct lpfc_nvme_lport *lport;
 667         struct lpfc_nvme_rport *rport;
 668         struct lpfc_vport *vport;
 669         int ret;
 670
 671         lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
 672         rport = (struct lpfc_nvme_rport *)pnvme_rport->private;
 673         if (unlikely(!lport) || unlikely(!rport))
 674                 return -EINVAL;
 675
 676         vport = lport->vport;
 677         if (test_bit(FC_UNLOADING, &vport->load_flag) ||
 678             vport->phba->hba_flag & HBA_IOQ_FLUSH)
 679                 return -ENODEV;
 680
 681         atomic_inc(&lport->fc4NvmeLsRequests);
 682
 683         ret = __lpfc_nvme_ls_req(vport, rport->ndlp, pnvme_lsreq,
 684                                  lpfc_nvme_ls_req_cmp);
 685         if (ret)
 686                 atomic_inc(&lport->xmt_ls_err);
 687
 688         return ret;
 689 }
 690
 691 /**
 692  * __lpfc_nvme_ls_abort - Generic service routine to abort a prior
 693  *         NVME LS request
 694  * @vport: The local port that issued the LS
 695  * @ndlp: The remote port the LS was sent to
 696  * @pnvme_lsreq: Pointer to LS request structure from the transport
 697  *
 698  * The driver validates the ndlp, looks for the LS, and aborts the
 699  * LS if found.
 700  *
 701  * Returns:
 702  * 0 : if LS found and aborted
 703  * non-zero: various error conditions in form -Exxx
 704  **/
 705 int
 706 __lpfc_nvme_ls_abort(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 707                         struct nvmefc_ls_req *pnvme_lsreq)
 708 {
 709         struct lpfc_hba *phba = vport->phba;
 710         struct lpfc_sli_ring *pring;
 711         struct lpfc_iocbq *wqe, *next_wqe;
 712         bool foundit = false;
 713
 714         if (!ndlp) {
 715                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
 716                                 "6049 NVMEx LS REQ Abort: Bad NDLP x%px DID "
 717                                 "x%06x, Failing LS Req\n",
 718                                 ndlp, ndlp ? ndlp->nlp_DID : 0);
 719                 return -EINVAL;
 720         }
 721
 722         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC | LOG_NVME_ABTS,
 723                          "6040 NVMEx LS REQ Abort: Issue LS_ABORT for lsreq "
 724                          "x%px rqstlen:%d rsplen:%d %pad %pad\n",
 725                          pnvme_lsreq, pnvme_lsreq->rqstlen,
 726                          pnvme_lsreq->rsplen, &pnvme_lsreq->rqstdma,
 727                          &pnvme_lsreq->rspdma);
 728
 729         /*
 730          * Lock the ELS ring txcmplq and look for the wqe that matches
 731          * this ELS. If found, issue an abort on the wqe.
 732          */
 733         pring = phba->sli4_hba.nvmels_wq->pring;
 734         spin_lock_irq(&phba->hbalock);
 735         spin_lock(&pring->ring_lock);
 736         list_for_each_entry_safe(wqe, next_wqe, &pring->txcmplq, list) {
 737                 if (wqe->context_un.nvme_lsreq == pnvme_lsreq) {
 738                         wqe->cmd_flag |= LPFC_DRIVER_ABORTED;
 739                         foundit = true;
 740                         break;
 741                 }
 742         }
 743         spin_unlock(&pring->ring_lock);
 744
 745         if (foundit)
 746                 lpfc_sli_issue_abort_iotag(phba, pring, wqe, NULL);
 747         spin_unlock_irq(&phba->hbalock);
 748
 749         if (foundit)
 750                 return 0;
 751
 752         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC | LOG_NVME_ABTS,
 753                          "6213 NVMEx LS REQ Abort: Unable to locate req x%px\n",
 754                          pnvme_lsreq);
 755         return -EINVAL;
 756 }
 757
 758 static int
 759 lpfc_nvme_xmt_ls_rsp(struct nvme_fc_local_port *localport,
 760                      struct nvme_fc_remote_port *remoteport,
 761                      struct nvmefc_ls_rsp *ls_rsp)
 762 {
 763         struct lpfc_async_xchg_ctx *axchg =
 764                 container_of(ls_rsp, struct lpfc_async_xchg_ctx, ls_rsp);
 765         struct lpfc_nvme_lport *lport;
 766         int rc;
 767
 768         if (test_bit(FC_UNLOADING, &axchg->phba->pport->load_flag))
 769                 return -ENODEV;
 770
 771         lport = (struct lpfc_nvme_lport *)localport->private;
 772
 773         rc = __lpfc_nvme_xmt_ls_rsp(axchg, ls_rsp, __lpfc_nvme_xmt_ls_rsp_cmp);
 774
 775         if (rc) {
 776                 /*
 777                  * unless the failure is due to having already sent
 778                  * the response, an abort will be generated for the
 779                  * exchange if the rsp can't be sent.
 780                  */
 781                 if (rc != -EALREADY)
 782                         atomic_inc(&lport->xmt_ls_abort);
 783                 return rc;
 784         }
 785
 786         return 0;
 787 }
 788
 789 /**
 790  * lpfc_nvme_ls_abort - Abort a prior NVME LS request
 791  * @pnvme_lport: Transport localport that LS is to be issued from.
 792  * @pnvme_rport: Transport remoteport that LS is to be sent to.
 793  * @pnvme_lsreq: the transport nvme_ls_req structure for the LS
 794  *
 795  * Driver registers this routine to abort a NVME LS request that is
 796  * in progress (from the transports perspective).
 797  **/
 798 static void
 799 lpfc_nvme_ls_abort(struct nvme_fc_local_port *pnvme_lport,
 800                    struct nvme_fc_remote_port *pnvme_rport,
 801                    struct nvmefc_ls_req *pnvme_lsreq)
 802 {
 803         struct lpfc_nvme_lport *lport;
 804         struct lpfc_vport *vport;
 805         struct lpfc_nodelist *ndlp;
 806         int ret;
 807
 808         lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
 809         if (unlikely(!lport))
 810                 return;
 811         vport = lport->vport;
 812
 813         if (test_bit(FC_UNLOADING, &vport->load_flag))
 814                 return;
 815
 816         ndlp = lpfc_findnode_did(vport, pnvme_rport->port_id);
 817
 818         ret = __lpfc_nvme_ls_abort(vport, ndlp, pnvme_lsreq);
 819         if (!ret)
 820                 atomic_inc(&lport->xmt_ls_abort);
 821 }
 822
 823 /* Fix up the existing sgls for NVME IO. */
 824 static inline void
 825 lpfc_nvme_adj_fcp_sgls(struct lpfc_vport *vport,
 826                        struct lpfc_io_buf *lpfc_ncmd,
 827                        struct nvmefc_fcp_req *nCmd)
 828 {
 829         struct lpfc_hba  *phba = vport->phba;
 830         struct sli4_sge *sgl;
 831         union lpfc_wqe128 *wqe;
 832         uint32_t *wptr, *dptr;
 833
 834         /*
 835          * Get a local pointer to the built-in wqe and correct
 836          * the cmd size to match NVME's 96 bytes and fix
 837          * the dma address.
 838          */
 839
 840         wqe = &lpfc_ncmd->cur_iocbq.wqe;
 841
 842         /*
 843          * Adjust the FCP_CMD and FCP_RSP DMA data and sge_len to
 844          * match NVME.  NVME sends 96 bytes. Also, use the
 845          * nvme commands command and response dma addresses
 846          * rather than the virtual memory to ease the restore
 847          * operation.
 848          */
 849         sgl = lpfc_ncmd->dma_sgl;
 850         sgl->sge_len = cpu_to_le32(nCmd->cmdlen);
 851         if (phba->cfg_nvme_embed_cmd) {
 852                 sgl->addr_hi = 0;
 853                 sgl->addr_lo = 0;
 854
 855                 /* Word 0-2 - NVME CMND IU (embedded payload) */
 856                 wqe->generic.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_IMMED;
 857                 wqe->generic.bde.tus.f.bdeSize = 56;
 858                 wqe->generic.bde.addrHigh = 0;
 859                 wqe->generic.bde.addrLow =  64;  /* Word 16 */
 860
 861                 /* Word 10  - dbde is 0, wqes is 1 in template */
 862
 863                 /*
 864                  * Embed the payload in the last half of the WQE
 865                  * WQE words 16-30 get the NVME CMD IU payload
 866                  *
 867                  * WQE words 16-19 get payload Words 1-4
 868                  * WQE words 20-21 get payload Words 6-7
 869                  * WQE words 22-29 get payload Words 16-23
 870                  */
 871                 wptr = &wqe->words[16];  /* WQE ptr */
 872                 dptr = (uint32_t *)nCmd->cmdaddr;  /* payload ptr */
 873                 dptr++;                 /* Skip Word 0 in payload */
 874
 875                 *wptr++ = *dptr++;      /* Word 1 */
 876                 *wptr++ = *dptr++;      /* Word 2 */
 877                 *wptr++ = *dptr++;      /* Word 3 */
 878                 *wptr++ = *dptr++;      /* Word 4 */
 879                 dptr++;                 /* Skip Word 5 in payload */
 880                 *wptr++ = *dptr++;      /* Word 6 */
 881                 *wptr++ = *dptr++;      /* Word 7 */
 882                 dptr += 8;              /* Skip Words 8-15 in payload */
 883                 *wptr++ = *dptr++;      /* Word 16 */
 884                 *wptr++ = *dptr++;      /* Word 17 */
 885                 *wptr++ = *dptr++;      /* Word 18 */
 886                 *wptr++ = *dptr++;      /* Word 19 */
 887                 *wptr++ = *dptr++;      /* Word 20 */
 888                 *wptr++ = *dptr++;      /* Word 21 */
 889                 *wptr++ = *dptr++;      /* Word 22 */
 890                 *wptr   = *dptr;        /* Word 23 */
 891         } else {
 892                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(nCmd->cmddma));
 893                 sgl->addr_lo = cpu_to_le32(putPaddrLow(nCmd->cmddma));
 894
 895                 /* Word 0-2 - NVME CMND IU Inline BDE */
 896                 wqe->generic.bde.tus.f.bdeFlags =  BUFF_TYPE_BDE_64;
 897                 wqe->generic.bde.tus.f.bdeSize = nCmd->cmdlen;
 898                 wqe->generic.bde.addrHigh = sgl->addr_hi;
 899                 wqe->generic.bde.addrLow =  sgl->addr_lo;
 900
 901                 /* Word 10 */
 902                 bf_set(wqe_dbde, &wqe->generic.wqe_com, 1);
 903                 bf_set(wqe_wqes, &wqe->generic.wqe_com, 0);
 904         }
 905
 906         sgl++;
 907
 908         /* Setup the physical region for the FCP RSP */
 909         sgl->addr_hi = cpu_to_le32(putPaddrHigh(nCmd->rspdma));
 910         sgl->addr_lo = cpu_to_le32(putPaddrLow(nCmd->rspdma));
 911         sgl->word2 = le32_to_cpu(sgl->word2);
 912         if (nCmd->sg_cnt)
 913                 bf_set(lpfc_sli4_sge_last, sgl, 0);
 914         else
 915                 bf_set(lpfc_sli4_sge_last, sgl, 1);
 916         sgl->word2 = cpu_to_le32(sgl->word2);
 917         sgl->sge_len = cpu_to_le32(nCmd->rsplen);
 918 }
 919
 920
 921 /*
 922  * lpfc_nvme_io_cmd_cmpl - Complete an NVME-over-FCP IO
 923  *
 924  * Driver registers this routine as it io request handler.  This
 925  * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
 926  * data structure to the rport indicated in @lpfc_nvme_rport.
 927  *
 928  * Return value :
 929  *   0 - Success
 930  *   TODO: What are the failure codes.
 931  **/
 932 static void
 933 lpfc_nvme_io_cmd_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pwqeIn,
 934                       struct lpfc_iocbq *pwqeOut)
 935 {
 936         struct lpfc_io_buf *lpfc_ncmd = pwqeIn->io_buf;
 937         struct lpfc_wcqe_complete *wcqe = &pwqeOut->wcqe_cmpl;
 938         struct lpfc_vport *vport = pwqeIn->vport;
 939         struct nvmefc_fcp_req *nCmd;
 940         struct nvme_fc_ersp_iu *ep;
 941         struct nvme_fc_cmd_iu *cp;
 942         struct lpfc_nodelist *ndlp;
 943         struct lpfc_nvme_fcpreq_priv *freqpriv;
 944         struct lpfc_nvme_lport *lport;
 945         uint32_t code, status, idx;
 946         uint16_t cid, sqhd, data;
 947         uint32_t *ptr;
 948         uint32_t lat;
 949         bool call_done = false;
 950 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 951         int cpu;
 952 #endif
 953         bool offline = false;
 954
 955         /* Sanity check on return of outstanding command */
 956         if (!lpfc_ncmd) {
 957                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
 958                                  "6071 Null lpfc_ncmd pointer. No "
 959                                  "release, skip completion\n");
 960                 return;
 961         }
 962
 963         /* Guard against abort handler being called at same time */
 964         spin_lock(&lpfc_ncmd->buf_lock);
 965
 966         if (!lpfc_ncmd->nvmeCmd) {
 967                 spin_unlock(&lpfc_ncmd->buf_lock);
 968                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
 969                                  "6066 Missing cmpl ptrs: lpfc_ncmd x%px, "
 970                                  "nvmeCmd x%px\n",
 971                                  lpfc_ncmd, lpfc_ncmd->nvmeCmd);
 972
 973                 /* Release the lpfc_ncmd regardless of the missing elements. */
 974                 lpfc_release_nvme_buf(phba, lpfc_ncmd);
 975                 return;
 976         }
 977         nCmd = lpfc_ncmd->nvmeCmd;
 978         status = bf_get(lpfc_wcqe_c_status, wcqe);
 979
 980         idx = lpfc_ncmd->cur_iocbq.hba_wqidx;
 981         phba->sli4_hba.hdwq[idx].nvme_cstat.io_cmpls++;
 982
 983         if (unlikely(status && vport->localport)) {
 984                 lport = (struct lpfc_nvme_lport *)vport->localport->private;
 985                 if (lport) {
 986                         if (bf_get(lpfc_wcqe_c_xb, wcqe))
 987                                 atomic_inc(&lport->cmpl_fcp_xb);
 988                         atomic_inc(&lport->cmpl_fcp_err);
 989                 }
 990         }
 991
 992         lpfc_nvmeio_data(phba, "NVME FCP CMPL: xri x%x stat x%x parm x%x\n",
 993                          lpfc_ncmd->cur_iocbq.sli4_xritag,
 994                          status, wcqe->parameter);
 995         /*
 996          * Catch race where our node has transitioned, but the
 997          * transport is still transitioning.
 998          */
 999         ndlp = lpfc_ncmd->ndlp;
1000         if (!ndlp) {
1001                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1002                                  "6062 Ignoring NVME cmpl.  No ndlp\n");
1003                 goto out_err;
1004         }
1005
1006         code = bf_get(lpfc_wcqe_c_code, wcqe);
1007         if (code == CQE_CODE_NVME_ERSP) {
1008                 /* For this type of CQE, we need to rebuild the rsp */
1009                 ep = (struct nvme_fc_ersp_iu *)nCmd->rspaddr;
1010
1011                 /*
1012                  * Get Command Id from cmd to plug into response. This
1013                  * code is not needed in the next NVME Transport drop.
1014                  */
1015                 cp = (struct nvme_fc_cmd_iu *)nCmd->cmdaddr;
1016                 cid = cp->sqe.common.command_id;
1017
1018                 /*
1019                  * RSN is in CQE word 2
1020                  * SQHD is in CQE Word 3 bits 15:0
1021                  * Cmd Specific info is in CQE Word 1
1022                  * and in CQE Word 0 bits 15:0
1023                  */
1024                 sqhd = bf_get(lpfc_wcqe_c_sqhead, wcqe);
1025
1026                 /* Now lets build the NVME ERSP IU */
1027                 ep->iu_len = cpu_to_be16(8);
1028                 ep->rsn = wcqe->parameter;
1029                 ep->xfrd_len = cpu_to_be32(nCmd->payload_length);
1030                 ep->rsvd12 = 0;
1031                 ptr = (uint32_t *)&ep->cqe.result.u64;
1032                 *ptr++ = wcqe->total_data_placed;
1033                 data = bf_get(lpfc_wcqe_c_ersp0, wcqe);
1034                 *ptr = (uint32_t)data;
1035                 ep->cqe.sq_head = sqhd;
1036                 ep->cqe.sq_id =  nCmd->sqid;
1037                 ep->cqe.command_id = cid;
1038                 ep->cqe.status = 0;
1039
1040                 lpfc_ncmd->status = IOSTAT_SUCCESS;
1041                 lpfc_ncmd->result = 0;
1042                 nCmd->rcv_rsplen = LPFC_NVME_ERSP_LEN;
1043                 nCmd->transferred_length = nCmd->payload_length;
1044         } else {
1045                 lpfc_ncmd->status = status;
1046                 lpfc_ncmd->result = (wcqe->parameter & IOERR_PARAM_MASK);
1047
1048                 /* For NVME, the only failure path that results in an
1049                  * IO error is when the adapter rejects it.  All other
1050                  * conditions are a success case and resolved by the
1051                  * transport.
1052                  * IOSTAT_FCP_RSP_ERROR means:
1053                  * 1. Length of data received doesn't match total
1054                  *    transfer length in WQE
1055                  * 2. If the RSP payload does NOT match these cases:
1056                  *    a. RSP length 12/24 bytes and all zeros
1057                  *    b. NVME ERSP
1058                  */
1059                 switch (lpfc_ncmd->status) {
1060                 case IOSTAT_SUCCESS:
1061                         nCmd->transferred_length = wcqe->total_data_placed;
1062                         nCmd->rcv_rsplen = 0;
1063                         nCmd->status = 0;
1064                         break;
1065                 case IOSTAT_FCP_RSP_ERROR:
1066                         nCmd->transferred_length = wcqe->total_data_placed;
1067                         nCmd->rcv_rsplen = wcqe->parameter;
1068                         nCmd->status = 0;
1069
1070                         /* Get the NVME cmd details for this unique error. */
1071                         cp = (struct nvme_fc_cmd_iu *)nCmd->cmdaddr;
1072                         ep = (struct nvme_fc_ersp_iu *)nCmd->rspaddr;
1073
1074                         /* Check if this is really an ERSP */
1075                         if (nCmd->rcv_rsplen == LPFC_NVME_ERSP_LEN) {
1076                                 lpfc_ncmd->status = IOSTAT_SUCCESS;
1077                                 lpfc_ncmd->result = 0;
1078
1079                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
1080                                         "6084 NVME FCP_ERR ERSP: "
1081                                         "xri %x placed x%x opcode x%x cmd_id "
1082                                         "x%x cqe_status x%x\n",
1083                                         lpfc_ncmd->cur_iocbq.sli4_xritag,
1084                                         wcqe->total_data_placed,
1085                                         cp->sqe.common.opcode,
1086                                         cp->sqe.common.command_id,
1087                                         ep->cqe.status);
1088                                 break;
1089                         }
1090                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1091                                          "6081 NVME Completion Protocol Error: "
1092                                          "xri %x status x%x result x%x "
1093                                          "placed x%x opcode x%x cmd_id x%x, "
1094                                          "cqe_status x%x\n",
1095                                          lpfc_ncmd->cur_iocbq.sli4_xritag,
1096                                          lpfc_ncmd->status, lpfc_ncmd->result,
1097                                          wcqe->total_data_placed,
1098                                          cp->sqe.common.opcode,
1099                                          cp->sqe.common.command_id,
1100                                          ep->cqe.status);
1101                         break;
1102                 case IOSTAT_LOCAL_REJECT:
1103                         /* Let fall through to set command final state. */
1104                         if (lpfc_ncmd->result == IOERR_ABORT_REQUESTED)
1105                                 lpfc_printf_vlog(vport, KERN_INFO,
1106                                          LOG_NVME_IOERR,
1107                                          "6032 Delay Aborted cmd x%px "
1108                                          "nvme cmd x%px, xri x%x, "
1109                                          "xb %d\n",
1110                                          lpfc_ncmd, nCmd,
1111                                          lpfc_ncmd->cur_iocbq.sli4_xritag,
1112                                          bf_get(lpfc_wcqe_c_xb, wcqe));
1113                         fallthrough;
1114                 default:
1115 out_err:
1116                         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1117                                          "6072 NVME Completion Error: xri %x "
1118                                          "status x%x result x%x [x%x] "
1119                                          "placed x%x\n",
1120                                          lpfc_ncmd->cur_iocbq.sli4_xritag,
1121                                          lpfc_ncmd->status, lpfc_ncmd->result,
1122                                          wcqe->parameter,
1123                                          wcqe->total_data_placed);
1124                         nCmd->transferred_length = 0;
1125                         nCmd->rcv_rsplen = 0;
1126                         nCmd->status = NVME_SC_INTERNAL;
1127                         if (pci_channel_offline(vport->phba->pcidev) ||
1128                             lpfc_ncmd->result == IOERR_SLI_DOWN)
1129                                 offline = true;
1130                 }
1131         }
1132
1133         /* pick up SLI4 exhange busy condition */
1134         if (bf_get(lpfc_wcqe_c_xb, wcqe) && !offline)
1135                 lpfc_ncmd->flags |= LPFC_SBUF_XBUSY;
1136         else
1137                 lpfc_ncmd->flags &= ~LPFC_SBUF_XBUSY;
1138
1139         /* Update stats and complete the IO.  There is
1140          * no need for dma unprep because the nvme_transport
1141          * owns the dma address.
1142          */
1143 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1144         if (lpfc_ncmd->ts_cmd_start) {
1145                 lpfc_ncmd->ts_isr_cmpl = pwqeIn->isr_timestamp;
1146                 lpfc_ncmd->ts_data_io = ktime_get_ns();
1147                 phba->ktime_last_cmd = lpfc_ncmd->ts_data_io;
1148                 lpfc_io_ktime(phba, lpfc_ncmd);
1149         }
1150         if (unlikely(phba->hdwqstat_on & LPFC_CHECK_NVME_IO)) {
1151                 cpu = raw_smp_processor_id();
1152                 this_cpu_inc(phba->sli4_hba.c_stat->cmpl_io);
1153                 if (lpfc_ncmd->cpu != cpu)
1154                         lpfc_printf_vlog(vport,
1155                                          KERN_INFO, LOG_NVME_IOERR,
1156                                          "6701 CPU Check cmpl: "
1157                                          "cpu %d expect %d\n",
1158                                          cpu, lpfc_ncmd->cpu);
1159         }
1160 #endif
1161
1162         /* NVME targets need completion held off until the abort exchange
1163          * completes unless the NVME Rport is getting unregistered.
1164          */
1165
1166         if (!(lpfc_ncmd->flags & LPFC_SBUF_XBUSY)) {
1167                 freqpriv = nCmd->private;
1168                 freqpriv->nvme_buf = NULL;
1169                 lpfc_ncmd->nvmeCmd = NULL;
1170                 call_done = true;
1171         }
1172         spin_unlock(&lpfc_ncmd->buf_lock);
1173
1174         /* Check if IO qualified for CMF */
1175         if (phba->cmf_active_mode != LPFC_CFG_OFF &&
1176             nCmd->io_dir == NVMEFC_FCP_READ &&
1177             nCmd->payload_length) {
1178                 /* Used when calculating average latency */
1179                 lat = ktime_get_ns() - lpfc_ncmd->rx_cmd_start;
1180                 lpfc_update_cmf_cmpl(phba, lat, nCmd->payload_length, NULL);
1181         }
1182
1183         if (call_done)
1184                 nCmd->done(nCmd);
1185
1186         /* Call release with XB=1 to queue the IO into the abort list. */
1187         lpfc_release_nvme_buf(phba, lpfc_ncmd);
1188 }
1189
1190
1191 /**
1192  * lpfc_nvme_prep_io_cmd - Issue an NVME-over-FCP IO
1193  * @vport: pointer to a host virtual N_Port data structure
1194  * @lpfc_ncmd: Pointer to lpfc scsi command
1195  * @pnode: pointer to a node-list data structure
1196  * @cstat: pointer to the control status structure
1197  *
1198  * Driver registers this routine as it io request handler.  This
1199  * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
1200  * data structure to the rport indicated in @lpfc_nvme_rport.
1201  *
1202  * Return value :
1203  *   0 - Success
1204  *   TODO: What are the failure codes.
1205  **/
1206 static int
1207 lpfc_nvme_prep_io_cmd(struct lpfc_vport *vport,
1208                       struct lpfc_io_buf *lpfc_ncmd,
1209                       struct lpfc_nodelist *pnode,
1210                       struct lpfc_fc4_ctrl_stat *cstat)
1211 {
1212         struct lpfc_hba *phba = vport->phba;
1213         struct nvmefc_fcp_req *nCmd = lpfc_ncmd->nvmeCmd;
1214         struct nvme_common_command *sqe;
1215         struct lpfc_iocbq *pwqeq = &lpfc_ncmd->cur_iocbq;
1216         union lpfc_wqe128 *wqe = &pwqeq->wqe;
1217         uint32_t req_len;
1218
1219         /*
1220          * There are three possibilities here - use scatter-gather segment, use
1221          * the single mapping, or neither.
1222          */
1223         if (nCmd->sg_cnt) {
1224                 if (nCmd->io_dir == NVMEFC_FCP_WRITE) {
1225                         /* From the iwrite template, initialize words 7 - 11 */
1226                         memcpy(&wqe->words[7],
1227                                &lpfc_iwrite_cmd_template.words[7],
1228                                sizeof(uint32_t) * 5);
1229
1230                         /* Word 4 */
1231                         wqe->fcp_iwrite.total_xfer_len = nCmd->payload_length;
1232
1233                         /* Word 5 */
1234                         if ((phba->cfg_nvme_enable_fb) &&
1235                             (pnode->nlp_flag & NLP_FIRSTBURST)) {
1236                                 req_len = lpfc_ncmd->nvmeCmd->payload_length;
1237                                 if (req_len < pnode->nvme_fb_size)
1238                                         wqe->fcp_iwrite.initial_xfer_len =
1239                                                 req_len;
1240                                 else
1241                                         wqe->fcp_iwrite.initial_xfer_len =
1242                                                 pnode->nvme_fb_size;
1243                         } else {
1244                                 wqe->fcp_iwrite.initial_xfer_len = 0;
1245                         }
1246                         cstat->output_requests++;
1247                 } else {
1248                         /* From the iread template, initialize words 7 - 11 */
1249                         memcpy(&wqe->words[7],
1250                                &lpfc_iread_cmd_template.words[7],
1251                                sizeof(uint32_t) * 5);
1252
1253                         /* Word 4 */
1254                         wqe->fcp_iread.total_xfer_len = nCmd->payload_length;
1255
1256                         /* Word 5 */
1257                         wqe->fcp_iread.rsrvd5 = 0;
1258
1259                         /* For a CMF Managed port, iod must be zero'ed */
1260                         if (phba->cmf_active_mode == LPFC_CFG_MANAGED)
1261                                 bf_set(wqe_iod, &wqe->fcp_iread.wqe_com,
1262                                        LPFC_WQE_IOD_NONE);
1263                         cstat->input_requests++;
1264                 }
1265         } else {
1266                 /* From the icmnd template, initialize words 4 - 11 */
1267                 memcpy(&wqe->words[4], &lpfc_icmnd_cmd_template.words[4],
1268                        sizeof(uint32_t) * 8);
1269                 cstat->control_requests++;
1270         }
1271
1272         if (pnode->nlp_nvme_info & NLP_NVME_NSLER) {
1273                 bf_set(wqe_erp, &wqe->generic.wqe_com, 1);
1274                 sqe = &((struct nvme_fc_cmd_iu *)
1275                         nCmd->cmdaddr)->sqe.common;
1276                 if (sqe->opcode == nvme_admin_async_event)
1277                         bf_set(wqe_ffrq, &wqe->generic.wqe_com, 1);
1278         }
1279
1280         /*
1281          * Finish initializing those WQE fields that are independent
1282          * of the nvme_cmnd request_buffer
1283          */
1284
1285         /* Word 3 */
1286         bf_set(payload_offset_len, &wqe->fcp_icmd,
1287                (nCmd->rsplen + nCmd->cmdlen));
1288
1289         /* Word 6 */
1290         bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
1291                phba->sli4_hba.rpi_ids[pnode->nlp_rpi]);
1292         bf_set(wqe_xri_tag, &wqe->generic.wqe_com, pwqeq->sli4_xritag);
1293
1294         /* Word 8 */
1295         wqe->generic.wqe_com.abort_tag = pwqeq->iotag;
1296
1297         /* Word 9 */
1298         bf_set(wqe_reqtag, &wqe->generic.wqe_com, pwqeq->iotag);
1299
1300         /* Word 10 */
1301         bf_set(wqe_xchg, &wqe->fcp_iwrite.wqe_com, LPFC_NVME_XCHG);
1302
1303         /* Words 13 14 15 are for PBDE support */
1304
1305         /* add the VMID tags as per switch response */
1306         if (unlikely(lpfc_ncmd->cur_iocbq.cmd_flag & LPFC_IO_VMID)) {
1307                 if (phba->pport->vmid_priority_tagging) {
1308                         bf_set(wqe_ccpe, &wqe->fcp_iwrite.wqe_com, 1);
1309                         bf_set(wqe_ccp, &wqe->fcp_iwrite.wqe_com,
1310                                lpfc_ncmd->cur_iocbq.vmid_tag.cs_ctl_vmid);
1311                 } else {
1312                         bf_set(wqe_appid, &wqe->fcp_iwrite.wqe_com, 1);
1313                         bf_set(wqe_wqes, &wqe->fcp_iwrite.wqe_com, 1);
1314                         wqe->words[31] = lpfc_ncmd->cur_iocbq.vmid_tag.app_id;
1315                 }
1316         }
1317
1318         pwqeq->vport = vport;
1319         return 0;
1320 }
1321
1322
1323 /**
1324  * lpfc_nvme_prep_io_dma - Issue an NVME-over-FCP IO
1325  * @vport: pointer to a host virtual N_Port data structure
1326  * @lpfc_ncmd: Pointer to lpfc scsi command
1327  *
1328  * Driver registers this routine as it io request handler.  This
1329  * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
1330  * data structure to the rport indicated in @lpfc_nvme_rport.
1331  *
1332  * Return value :
1333  *   0 - Success
1334  *   TODO: What are the failure codes.
1335  **/
1336 static int
1337 lpfc_nvme_prep_io_dma(struct lpfc_vport *vport,
1338                       struct lpfc_io_buf *lpfc_ncmd)
1339 {
1340         struct lpfc_hba *phba = vport->phba;
1341         struct nvmefc_fcp_req *nCmd = lpfc_ncmd->nvmeCmd;
1342         union lpfc_wqe128 *wqe = &lpfc_ncmd->cur_iocbq.wqe;
1343         struct sli4_sge *sgl = lpfc_ncmd->dma_sgl;
1344         struct sli4_hybrid_sgl *sgl_xtra = NULL;
1345         struct scatterlist *data_sg;
1346         struct sli4_sge *first_data_sgl;
1347         struct ulp_bde64 *bde;
1348         dma_addr_t physaddr = 0;
1349         uint32_t dma_len = 0;
1350         uint32_t dma_offset = 0;
1351         int nseg, i, j;
1352         bool lsp_just_set = false;
1353
1354         /* Fix up the command and response DMA stuff. */
1355         lpfc_nvme_adj_fcp_sgls(vport, lpfc_ncmd, nCmd);
1356
1357         /*
1358          * There are three possibilities here - use scatter-gather segment, use
1359          * the single mapping, or neither.
1360          */
1361         if (nCmd->sg_cnt) {
1362                 /*
1363                  * Jump over the cmd and rsp SGEs.  The fix routine
1364                  * has already adjusted for this.
1365                  */
1366                 sgl += 2;
1367
1368                 first_data_sgl = sgl;
1369                 lpfc_ncmd->seg_cnt = nCmd->sg_cnt;
1370                 if (lpfc_ncmd->seg_cnt > lpfc_nvme_template.max_sgl_segments) {
1371                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1372                                         "6058 Too many sg segments from "
1373                                         "NVME Transport.  Max %d, "
1374                                         "nvmeIO sg_cnt %d\n",
1375                                         phba->cfg_nvme_seg_cnt + 1,
1376                                         lpfc_ncmd->seg_cnt);
1377                         lpfc_ncmd->seg_cnt = 0;
1378                         return 1;
1379                 }
1380
1381                 /*
1382                  * The driver established a maximum scatter-gather segment count
1383                  * during probe that limits the number of sg elements in any
1384                  * single nvme command.  Just run through the seg_cnt and format
1385                  * the sge's.
1386                  */
1387                 nseg = nCmd->sg_cnt;
1388                 data_sg = nCmd->first_sgl;
1389
1390                 /* for tracking the segment boundaries */
1391                 j = 2;
1392                 for (i = 0; i < nseg; i++) {
1393                         if (data_sg == NULL) {
1394                                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1395                                                 "6059 dptr err %d, nseg %d\n",
1396                                                 i, nseg);
1397                                 lpfc_ncmd->seg_cnt = 0;
1398                                 return 1;
1399                         }
1400
1401                         sgl->word2 = 0;
1402                         if (nseg == 1) {
1403                                 bf_set(lpfc_sli4_sge_last, sgl, 1);
1404                                 bf_set(lpfc_sli4_sge_type, sgl,
1405                                        LPFC_SGE_TYPE_DATA);
1406                         } else {
1407                                 bf_set(lpfc_sli4_sge_last, sgl, 0);
1408
1409                                 /* expand the segment */
1410                                 if (!lsp_just_set &&
1411                                     !((j + 1) % phba->border_sge_num) &&
1412                                     ((nseg - 1) != i)) {
1413                                         /* set LSP type */
1414                                         bf_set(lpfc_sli4_sge_type, sgl,
1415                                                LPFC_SGE_TYPE_LSP);
1416
1417                                         sgl_xtra = lpfc_get_sgl_per_hdwq(
1418                                                         phba, lpfc_ncmd);
1419
1420                                         if (unlikely(!sgl_xtra)) {
1421                                                 lpfc_ncmd->seg_cnt = 0;
1422                                                 return 1;
1423                                         }
1424                                         sgl->addr_lo = cpu_to_le32(putPaddrLow(
1425                                                        sgl_xtra->dma_phys_sgl));
1426                                         sgl->addr_hi = cpu_to_le32(putPaddrHigh(
1427                                                        sgl_xtra->dma_phys_sgl));
1428
1429                                 } else {
1430                                         bf_set(lpfc_sli4_sge_type, sgl,
1431                                                LPFC_SGE_TYPE_DATA);
1432                                 }
1433                         }
1434
1435                         if (!(bf_get(lpfc_sli4_sge_type, sgl) &
1436                                      LPFC_SGE_TYPE_LSP)) {
1437                                 if ((nseg - 1) == i)
1438                                         bf_set(lpfc_sli4_sge_last, sgl, 1);
1439
1440                                 physaddr = sg_dma_address(data_sg);
1441                                 dma_len = sg_dma_len(data_sg);
1442                                 sgl->addr_lo = cpu_to_le32(
1443                                                          putPaddrLow(physaddr));
1444                                 sgl->addr_hi = cpu_to_le32(
1445                                                         putPaddrHigh(physaddr));
1446
1447                                 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
1448                                 sgl->word2 = cpu_to_le32(sgl->word2);
1449                                 sgl->sge_len = cpu_to_le32(dma_len);
1450
1451                                 dma_offset += dma_len;
1452                                 data_sg = sg_next(data_sg);
1453
1454                                 sgl++;
1455
1456                                 lsp_just_set = false;
1457                         } else {
1458                                 sgl->word2 = cpu_to_le32(sgl->word2);
1459
1460                                 sgl->sge_len = cpu_to_le32(
1461                                                      phba->cfg_sg_dma_buf_size);
1462
1463                                 sgl = (struct sli4_sge *)sgl_xtra->dma_sgl;
1464                                 i = i - 1;
1465
1466                                 lsp_just_set = true;
1467                         }
1468
1469                         j++;
1470                 }
1471
1472                 /* PBDE support for first data SGE only */
1473                 if (nseg == 1 && phba->cfg_enable_pbde) {
1474                         /* Words 13-15 */
1475                         bde = (struct ulp_bde64 *)
1476                                 &wqe->words[13];
1477                         bde->addrLow = first_data_sgl->addr_lo;
1478                         bde->addrHigh = first_data_sgl->addr_hi;
1479                         bde->tus.f.bdeSize =
1480                                 le32_to_cpu(first_data_sgl->sge_len);
1481                         bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1482                         bde->tus.w = cpu_to_le32(bde->tus.w);
1483
1484                         /* Word 11 - set PBDE bit */
1485                         bf_set(wqe_pbde, &wqe->generic.wqe_com, 1);
1486                 } else {
1487                         memset(&wqe->words[13], 0, (sizeof(uint32_t) * 3));
1488                         /* Word 11 - PBDE bit disabled by default template */
1489                 }
1490
1491         } else {
1492                 lpfc_ncmd->seg_cnt = 0;
1493
1494                 /* For this clause to be valid, the payload_length
1495                  * and sg_cnt must zero.
1496                  */
1497                 if (nCmd->payload_length != 0) {
1498                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1499                                         "6063 NVME DMA Prep Err: sg_cnt %d "
1500                                         "payload_length x%x\n",
1501                                         nCmd->sg_cnt, nCmd->payload_length);
1502                         return 1;
1503                 }
1504         }
1505         return 0;
1506 }
1507
1508 /**
1509  * lpfc_nvme_fcp_io_submit - Issue an NVME-over-FCP IO
1510  * @pnvme_lport: Pointer to the driver's local port data
1511  * @pnvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
1512  * @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue
1513  * @pnvme_fcreq: IO request from nvme fc to driver.
1514  *
1515  * Driver registers this routine as it io request handler.  This
1516  * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
1517  * data structure to the rport indicated in @lpfc_nvme_rport.
1518  *
1519  * Return value :
1520  *   0 - Success
1521  *   TODO: What are the failure codes.
1522  **/
1523 static int
1524 lpfc_nvme_fcp_io_submit(struct nvme_fc_local_port *pnvme_lport,
1525                         struct nvme_fc_remote_port *pnvme_rport,
1526                         void *hw_queue_handle,
1527                         struct nvmefc_fcp_req *pnvme_fcreq)
1528 {
1529         int ret = 0;
1530         int expedite = 0;
1531         int idx, cpu;
1532         struct lpfc_nvme_lport *lport;
1533         struct lpfc_fc4_ctrl_stat *cstat;
1534         struct lpfc_vport *vport;
1535         struct lpfc_hba *phba;
1536         struct lpfc_nodelist *ndlp;
1537         struct lpfc_io_buf *lpfc_ncmd;
1538         struct lpfc_nvme_rport *rport;
1539         struct lpfc_nvme_qhandle *lpfc_queue_info;
1540         struct lpfc_nvme_fcpreq_priv *freqpriv;
1541         struct nvme_common_command *sqe;
1542         uint64_t start = 0;
1543 #if (IS_ENABLED(CONFIG_NVME_FC))
1544         u8 *uuid = NULL;
1545         int err;
1546         enum dma_data_direction iodir;
1547 #endif
1548
1549         /* Validate pointers. LLDD fault handling with transport does
1550          * have timing races.
1551          */
1552         lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
1553         if (unlikely(!lport)) {
1554                 ret = -EINVAL;
1555                 goto out_fail;
1556         }
1557
1558         vport = lport->vport;
1559
1560         if (unlikely(!hw_queue_handle)) {
1561                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1562                                  "6117 Fail IO, NULL hw_queue_handle\n");
1563                 atomic_inc(&lport->xmt_fcp_err);
1564                 ret = -EBUSY;
1565                 goto out_fail;
1566         }
1567
1568         phba = vport->phba;
1569
1570         if ((unlikely(test_bit(FC_UNLOADING, &vport->load_flag))) ||
1571             phba->hba_flag & HBA_IOQ_FLUSH) {
1572                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1573                                  "6124 Fail IO, Driver unload\n");
1574                 atomic_inc(&lport->xmt_fcp_err);
1575                 ret = -ENODEV;
1576                 goto out_fail;
1577         }
1578
1579         freqpriv = pnvme_fcreq->private;
1580         if (unlikely(!freqpriv)) {
1581                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1582                                  "6158 Fail IO, NULL request data\n");
1583                 atomic_inc(&lport->xmt_fcp_err);
1584                 ret = -EINVAL;
1585                 goto out_fail;
1586         }
1587
1588 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1589         if (phba->ktime_on)
1590                 start = ktime_get_ns();
1591 #endif
1592         rport = (struct lpfc_nvme_rport *)pnvme_rport->private;
1593         lpfc_queue_info = (struct lpfc_nvme_qhandle *)hw_queue_handle;
1594
1595         /*
1596          * Catch race where our node has transitioned, but the
1597          * transport is still transitioning.
1598          */
1599         ndlp = rport->ndlp;
1600         if (!ndlp) {
1601                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE | LOG_NVME_IOERR,
1602                                  "6053 Busy IO, ndlp not ready: rport x%px "
1603                                   "ndlp x%px, DID x%06x\n",
1604                                  rport, ndlp, pnvme_rport->port_id);
1605                 atomic_inc(&lport->xmt_fcp_err);
1606                 ret = -EBUSY;
1607                 goto out_fail;
1608         }
1609
1610         /* The remote node has to be a mapped target or it's an error. */
1611         if ((ndlp->nlp_type & NLP_NVME_TARGET) &&
1612             (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
1613                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE | LOG_NVME_IOERR,
1614                                  "6036 Fail IO, DID x%06x not ready for "
1615                                  "IO. State x%x, Type x%x Flg x%x\n",
1616                                  pnvme_rport->port_id,
1617                                  ndlp->nlp_state, ndlp->nlp_type,
1618                                  ndlp->fc4_xpt_flags);
1619                 atomic_inc(&lport->xmt_fcp_bad_ndlp);
1620                 ret = -EBUSY;
1621                 goto out_fail;
1622
1623         }
1624
1625         /* Currently only NVME Keep alive commands should be expedited
1626          * if the driver runs out of a resource. These should only be
1627          * issued on the admin queue, qidx 0
1628          */
1629         if (!lpfc_queue_info->qidx && !pnvme_fcreq->sg_cnt) {
1630                 sqe = &((struct nvme_fc_cmd_iu *)
1631                         pnvme_fcreq->cmdaddr)->sqe.common;
1632                 if (sqe->opcode == nvme_admin_keep_alive)
1633                         expedite = 1;
1634         }
1635
1636         /* Check if IO qualifies for CMF */
1637         if (phba->cmf_active_mode != LPFC_CFG_OFF &&
1638             pnvme_fcreq->io_dir == NVMEFC_FCP_READ &&
1639             pnvme_fcreq->payload_length) {
1640                 ret = lpfc_update_cmf_cmd(phba, pnvme_fcreq->payload_length);
1641                 if (ret) {
1642                         ret = -EBUSY;
1643                         goto out_fail;
1644                 }
1645                 /* Get start time for IO latency */
1646                 start = ktime_get_ns();
1647         }
1648
1649         /* The node is shared with FCP IO, make sure the IO pending count does
1650          * not exceed the programmed depth.
1651          */
1652         if (lpfc_ndlp_check_qdepth(phba, ndlp)) {
1653                 if ((atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth) &&
1654                     !expedite) {
1655                         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1656                                          "6174 Fail IO, ndlp qdepth exceeded: "
1657                                          "idx %d DID %x pend %d qdepth %d\n",
1658                                          lpfc_queue_info->index, ndlp->nlp_DID,
1659                                          atomic_read(&ndlp->cmd_pending),
1660                                          ndlp->cmd_qdepth);
1661                         atomic_inc(&lport->xmt_fcp_qdepth);
1662                         ret = -EBUSY;
1663                         goto out_fail1;
1664                 }
1665         }
1666
1667         /* Lookup Hardware Queue index based on fcp_io_sched module parameter */
1668         if (phba->cfg_fcp_io_sched == LPFC_FCP_SCHED_BY_HDWQ) {
1669                 idx = lpfc_queue_info->index;
1670         } else {
1671                 cpu = raw_smp_processor_id();
1672                 idx = phba->sli4_hba.cpu_map[cpu].hdwq;
1673         }
1674
1675         lpfc_ncmd = lpfc_get_nvme_buf(phba, ndlp, idx, expedite);
1676         if (lpfc_ncmd == NULL) {
1677                 atomic_inc(&lport->xmt_fcp_noxri);
1678                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1679                                  "6065 Fail IO, driver buffer pool is empty: "
1680                                  "idx %d DID %x\n",
1681                                  lpfc_queue_info->index, ndlp->nlp_DID);
1682                 ret = -EBUSY;
1683                 goto out_fail1;
1684         }
1685 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1686         if (start) {
1687                 lpfc_ncmd->ts_cmd_start = start;
1688                 lpfc_ncmd->ts_last_cmd = phba->ktime_last_cmd;
1689         } else {
1690                 lpfc_ncmd->ts_cmd_start = 0;
1691         }
1692 #endif
1693         lpfc_ncmd->rx_cmd_start = start;
1694
1695         /*
1696          * Store the data needed by the driver to issue, abort, and complete
1697          * an IO.
1698          * Do not let the IO hang out forever.  There is no midlayer issuing
1699          * an abort so inform the FW of the maximum IO pending time.
1700          */
1701         freqpriv->nvme_buf = lpfc_ncmd;
1702         lpfc_ncmd->nvmeCmd = pnvme_fcreq;
1703         lpfc_ncmd->ndlp = ndlp;
1704         lpfc_ncmd->qidx = lpfc_queue_info->qidx;
1705
1706 #if (IS_ENABLED(CONFIG_NVME_FC))
1707         /* check the necessary and sufficient condition to support VMID */
1708         if (lpfc_is_vmid_enabled(phba) &&
1709             (ndlp->vmid_support ||
1710              phba->pport->vmid_priority_tagging ==
1711              LPFC_VMID_PRIO_TAG_ALL_TARGETS)) {
1712                 /* is the I/O generated by a VM, get the associated virtual */
1713                 /* entity id */
1714                 uuid = nvme_fc_io_getuuid(pnvme_fcreq);
1715
1716                 if (uuid) {
1717                         if (pnvme_fcreq->io_dir == NVMEFC_FCP_WRITE)
1718                                 iodir = DMA_TO_DEVICE;
1719                         else if (pnvme_fcreq->io_dir == NVMEFC_FCP_READ)
1720                                 iodir = DMA_FROM_DEVICE;
1721                         else
1722                                 iodir = DMA_NONE;
1723
1724                         err = lpfc_vmid_get_appid(vport, uuid, iodir,
1725                                         (union lpfc_vmid_io_tag *)
1726                                                 &lpfc_ncmd->cur_iocbq.vmid_tag);
1727                         if (!err)
1728                                 lpfc_ncmd->cur_iocbq.cmd_flag |= LPFC_IO_VMID;
1729                 }
1730         }
1731 #endif
1732
1733         /*
1734          * Issue the IO on the WQ indicated by index in the hw_queue_handle.
1735          * This identfier was create in our hardware queue create callback
1736          * routine. The driver now is dependent on the IO queue steering from
1737          * the transport.  We are trusting the upper NVME layers know which
1738          * index to use and that they have affinitized a CPU to this hardware
1739          * queue. A hardware queue maps to a driver MSI-X vector/EQ/CQ/WQ.
1740          */
1741         lpfc_ncmd->cur_iocbq.hba_wqidx = idx;
1742         cstat = &phba->sli4_hba.hdwq[idx].nvme_cstat;
1743
1744         lpfc_nvme_prep_io_cmd(vport, lpfc_ncmd, ndlp, cstat);
1745         ret = lpfc_nvme_prep_io_dma(vport, lpfc_ncmd);
1746         if (ret) {
1747                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1748                                  "6175 Fail IO, Prep DMA: "
1749                                  "idx %d DID %x\n",
1750                                  lpfc_queue_info->index, ndlp->nlp_DID);
1751                 atomic_inc(&lport->xmt_fcp_err);
1752                 ret = -ENOMEM;
1753                 goto out_free_nvme_buf;
1754         }
1755
1756         lpfc_nvmeio_data(phba, "NVME FCP XMIT: xri x%x idx %d to %06x\n",
1757                          lpfc_ncmd->cur_iocbq.sli4_xritag,
1758                          lpfc_queue_info->index, ndlp->nlp_DID);
1759
1760         ret = lpfc_sli4_issue_wqe(phba, lpfc_ncmd->hdwq, &lpfc_ncmd->cur_iocbq);
1761         if (ret) {
1762                 atomic_inc(&lport->xmt_fcp_wqerr);
1763                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1764                                  "6113 Fail IO, Could not issue WQE err %x "
1765                                  "sid: x%x did: x%x oxid: x%x\n",
1766                                  ret, vport->fc_myDID, ndlp->nlp_DID,
1767                                  lpfc_ncmd->cur_iocbq.sli4_xritag);
1768                 goto out_free_nvme_buf;
1769         }
1770
1771         if (phba->cfg_xri_rebalancing)
1772                 lpfc_keep_pvt_pool_above_lowwm(phba, lpfc_ncmd->hdwq_no);
1773
1774 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1775         if (lpfc_ncmd->ts_cmd_start)
1776                 lpfc_ncmd->ts_cmd_wqput = ktime_get_ns();
1777
1778         if (phba->hdwqstat_on & LPFC_CHECK_NVME_IO) {
1779                 cpu = raw_smp_processor_id();
1780                 this_cpu_inc(phba->sli4_hba.c_stat->xmt_io);
1781                 lpfc_ncmd->cpu = cpu;
1782                 if (idx != cpu)
1783                         lpfc_printf_vlog(vport,
1784                                          KERN_INFO, LOG_NVME_IOERR,
1785                                         "6702 CPU Check cmd: "
1786                                         "cpu %d wq %d\n",
1787                                         lpfc_ncmd->cpu,
1788                                         lpfc_queue_info->index);
1789         }
1790 #endif
1791         return 0;
1792
1793  out_free_nvme_buf:
1794         if (lpfc_ncmd->nvmeCmd->sg_cnt) {
1795                 if (lpfc_ncmd->nvmeCmd->io_dir == NVMEFC_FCP_WRITE)
1796                         cstat->output_requests--;
1797                 else
1798                         cstat->input_requests--;
1799         } else
1800                 cstat->control_requests--;
1801         lpfc_release_nvme_buf(phba, lpfc_ncmd);
1802  out_fail1:
1803         lpfc_update_cmf_cmpl(phba, LPFC_CGN_NOT_SENT,
1804                              pnvme_fcreq->payload_length, NULL);
1805  out_fail:
1806         return ret;
1807 }
1808
1809 /**
1810  * lpfc_nvme_abort_fcreq_cmpl - Complete an NVME FCP abort request.
1811  * @phba: Pointer to HBA context object
1812  * @cmdiocb: Pointer to command iocb object.
1813  * @rspiocb: Pointer to response iocb object.
1814  *
1815  * This is the callback function for any NVME FCP IO that was aborted.
1816  *
1817  * Return value:
1818  *   None
1819  **/
1820 void
1821 lpfc_nvme_abort_fcreq_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
1822                            struct lpfc_iocbq *rspiocb)
1823 {
1824         struct lpfc_wcqe_complete *abts_cmpl = &rspiocb->wcqe_cmpl;
1825
1826         lpfc_printf_log(phba, KERN_INFO, LOG_NVME,
1827                         "6145 ABORT_XRI_CN completing on rpi x%x "
1828                         "original iotag x%x, abort cmd iotag x%x "
1829                         "req_tag x%x, status x%x, hwstatus x%x\n",
1830                         bf_get(wqe_ctxt_tag, &cmdiocb->wqe.generic.wqe_com),
1831                         get_job_abtsiotag(phba, cmdiocb), cmdiocb->iotag,
1832                         bf_get(lpfc_wcqe_c_request_tag, abts_cmpl),
1833                         bf_get(lpfc_wcqe_c_status, abts_cmpl),
1834                         bf_get(lpfc_wcqe_c_hw_status, abts_cmpl));
1835         lpfc_sli_release_iocbq(phba, cmdiocb);
1836 }
1837
1838 /**
1839  * lpfc_nvme_fcp_abort - Issue an NVME-over-FCP ABTS
1840  * @pnvme_lport: Pointer to the driver's local port data
1841  * @pnvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
1842  * @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue
1843  * @pnvme_fcreq: IO request from nvme fc to driver.
1844  *
1845  * Driver registers this routine as its nvme request io abort handler.  This
1846  * routine issues an fcp Abort WQE with data from the @lpfc_nvme_fcpreq
1847  * data structure to the rport indicated in @lpfc_nvme_rport.  This routine
1848  * is executed asynchronously - one the target is validated as "MAPPED" and
1849  * ready for IO, the driver issues the abort request and returns.
1850  *
1851  * Return value:
1852  *   None
1853  **/
1854 static void
1855 lpfc_nvme_fcp_abort(struct nvme_fc_local_port *pnvme_lport,
1856                     struct nvme_fc_remote_port *pnvme_rport,
1857                     void *hw_queue_handle,
1858                     struct nvmefc_fcp_req *pnvme_fcreq)
1859 {
1860         struct lpfc_nvme_lport *lport;
1861         struct lpfc_vport *vport;
1862         struct lpfc_hba *phba;
1863         struct lpfc_io_buf *lpfc_nbuf;
1864         struct lpfc_iocbq *nvmereq_wqe;
1865         struct lpfc_nvme_fcpreq_priv *freqpriv;
1866         unsigned long flags;
1867         int ret_val;
1868
1869         /* Validate pointers. LLDD fault handling with transport does
1870          * have timing races.
1871          */
1872         lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
1873         if (unlikely(!lport))
1874                 return;
1875
1876         vport = lport->vport;
1877
1878         if (unlikely(!hw_queue_handle)) {
1879                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS,
1880                                  "6129 Fail Abort, HW Queue Handle NULL.\n");
1881                 return;
1882         }
1883
1884         phba = vport->phba;
1885         freqpriv = pnvme_fcreq->private;
1886
1887         if (unlikely(!freqpriv))
1888                 return;
1889         if (test_bit(FC_UNLOADING, &vport->load_flag))
1890                 return;
1891
1892         /* Announce entry to new IO submit field. */
1893         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS,
1894                          "6002 Abort Request to rport DID x%06x "
1895                          "for nvme_fc_req x%px\n",
1896                          pnvme_rport->port_id,
1897                          pnvme_fcreq);
1898
1899         lpfc_nbuf = freqpriv->nvme_buf;
1900         if (!lpfc_nbuf) {
1901                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1902                                  "6140 NVME IO req has no matching lpfc nvme "
1903                                  "io buffer.  Skipping abort req.\n");
1904                 return;
1905         } else if (!lpfc_nbuf->nvmeCmd) {
1906                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1907                                  "6141 lpfc NVME IO req has no nvme_fcreq "
1908                                  "io buffer.  Skipping abort req.\n");
1909                 return;
1910         }
1911
1912         /* Guard against IO completion being called at same time */
1913         spin_lock_irqsave(&lpfc_nbuf->buf_lock, flags);
1914
1915         /* If the hba is getting reset, this flag is set.  It is
1916          * cleared when the reset is complete and rings reestablished.
1917          */
1918         spin_lock(&phba->hbalock);
1919         /* driver queued commands are in process of being flushed */
1920         if (phba->hba_flag & HBA_IOQ_FLUSH) {
1921                 spin_unlock(&phba->hbalock);
1922                 spin_unlock_irqrestore(&lpfc_nbuf->buf_lock, flags);
1923                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1924                                  "6139 Driver in reset cleanup - flushing "
1925                                  "NVME Req now.  hba_flag x%x\n",
1926                                  phba->hba_flag);
1927                 return;
1928         }
1929
1930         nvmereq_wqe = &lpfc_nbuf->cur_iocbq;
1931
1932         /*
1933          * The lpfc_nbuf and the mapped nvme_fcreq in the driver's
1934          * state must match the nvme_fcreq passed by the nvme
1935          * transport.  If they don't match, it is likely the driver
1936          * has already completed the NVME IO and the nvme transport
1937          * has not seen it yet.
1938          */
1939         if (lpfc_nbuf->nvmeCmd != pnvme_fcreq) {
1940                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1941                                  "6143 NVME req mismatch: "
1942                                  "lpfc_nbuf x%px nvmeCmd x%px, "
1943                                  "pnvme_fcreq x%px.  Skipping Abort xri x%x\n",
1944                                  lpfc_nbuf, lpfc_nbuf->nvmeCmd,
1945                                  pnvme_fcreq, nvmereq_wqe->sli4_xritag);
1946                 goto out_unlock;
1947         }
1948
1949         /* Don't abort IOs no longer on the pending queue. */
1950         if (!(nvmereq_wqe->cmd_flag & LPFC_IO_ON_TXCMPLQ)) {
1951                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1952                                  "6142 NVME IO req x%px not queued - skipping "
1953                                  "abort req xri x%x\n",
1954                                  pnvme_fcreq, nvmereq_wqe->sli4_xritag);
1955                 goto out_unlock;
1956         }
1957
1958         atomic_inc(&lport->xmt_fcp_abort);
1959         lpfc_nvmeio_data(phba, "NVME FCP ABORT: xri x%x idx %d to %06x\n",
1960                          nvmereq_wqe->sli4_xritag,
1961                          nvmereq_wqe->hba_wqidx, pnvme_rport->port_id);
1962
1963         /* Outstanding abort is in progress */
1964         if (nvmereq_wqe->cmd_flag & LPFC_DRIVER_ABORTED) {
1965                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1966                                  "6144 Outstanding NVME I/O Abort Request "
1967                                  "still pending on nvme_fcreq x%px, "
1968                                  "lpfc_ncmd x%px xri x%x\n",
1969                                  pnvme_fcreq, lpfc_nbuf,
1970                                  nvmereq_wqe->sli4_xritag);
1971                 goto out_unlock;
1972         }
1973
1974         ret_val = lpfc_sli4_issue_abort_iotag(phba, nvmereq_wqe,
1975                                               lpfc_nvme_abort_fcreq_cmpl);
1976
1977         spin_unlock(&phba->hbalock);
1978         spin_unlock_irqrestore(&lpfc_nbuf->buf_lock, flags);
1979
1980         /* Make sure HBA is alive */
1981         lpfc_issue_hb_tmo(phba);
1982
1983         if (ret_val != WQE_SUCCESS) {
1984                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1985                                  "6137 Failed abts issue_wqe with status x%x "
1986                                  "for nvme_fcreq x%px.\n",
1987                                  ret_val, pnvme_fcreq);
1988                 return;
1989         }
1990
1991         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS,
1992                          "6138 Transport Abort NVME Request Issued for "
1993                          "ox_id x%x\n",
1994                          nvmereq_wqe->sli4_xritag);
1995         return;
1996
1997 out_unlock:
1998         spin_unlock(&phba->hbalock);
1999         spin_unlock_irqrestore(&lpfc_nbuf->buf_lock, flags);
2000         return;
2001 }
2002
2003 /* Declare and initialization an instance of the FC NVME template. */
2004 static struct nvme_fc_port_template lpfc_nvme_template = {
2005         /* initiator-based functions */
2006         .localport_delete  = lpfc_nvme_localport_delete,
2007         .remoteport_delete = lpfc_nvme_remoteport_delete,
2008         .create_queue = lpfc_nvme_create_queue,
2009         .delete_queue = lpfc_nvme_delete_queue,
2010         .ls_req       = lpfc_nvme_ls_req,
2011         .fcp_io       = lpfc_nvme_fcp_io_submit,
2012         .ls_abort     = lpfc_nvme_ls_abort,
2013         .fcp_abort    = lpfc_nvme_fcp_abort,
2014         .xmt_ls_rsp   = lpfc_nvme_xmt_ls_rsp,
2015
2016         .max_hw_queues = 1,
2017         .max_sgl_segments = LPFC_NVME_DEFAULT_SEGS,
2018         .max_dif_sgl_segments = LPFC_NVME_DEFAULT_SEGS,
2019         .dma_boundary = 0xFFFFFFFF,
2020
2021         /* Sizes of additional private data for data structures.
2022          * No use for the last two sizes at this time.
2023          */
2024         .local_priv_sz = sizeof(struct lpfc_nvme_lport),
2025         .remote_priv_sz = sizeof(struct lpfc_nvme_rport),
2026         .lsrqst_priv_sz = 0,
2027         .fcprqst_priv_sz = sizeof(struct lpfc_nvme_fcpreq_priv),
2028 };
2029
2030 /*
2031  * lpfc_get_nvme_buf - Get a nvme buffer from io_buf_list of the HBA
2032  *
2033  * This routine removes a nvme buffer from head of @hdwq io_buf_list
2034  * and returns to caller.
2035  *
2036  * Return codes:
2037  *   NULL - Error
2038  *   Pointer to lpfc_nvme_buf - Success
2039  **/
2040 static struct lpfc_io_buf *
2041 lpfc_get_nvme_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp,
2042                   int idx, int expedite)
2043 {
2044         struct lpfc_io_buf *lpfc_ncmd;
2045         struct lpfc_sli4_hdw_queue *qp;
2046         struct sli4_sge *sgl;
2047         struct lpfc_iocbq *pwqeq;
2048         union lpfc_wqe128 *wqe;
2049
2050         lpfc_ncmd = lpfc_get_io_buf(phba, NULL, idx, expedite);
2051
2052         if (lpfc_ncmd) {
2053                 pwqeq = &(lpfc_ncmd->cur_iocbq);
2054                 wqe = &pwqeq->wqe;
2055
2056                 /* Setup key fields in buffer that may have been changed
2057                  * if other protocols used this buffer.
2058                  */
2059                 pwqeq->cmd_flag = LPFC_IO_NVME;
2060                 pwqeq->cmd_cmpl = lpfc_nvme_io_cmd_cmpl;
2061                 lpfc_ncmd->start_time = jiffies;
2062                 lpfc_ncmd->flags = 0;
2063
2064                 /* Rsp SGE will be filled in when we rcv an IO
2065                  * from the NVME Layer to be sent.
2066                  * The cmd is going to be embedded so we need a SKIP SGE.
2067                  */
2068                 sgl = lpfc_ncmd->dma_sgl;
2069                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2070                 bf_set(lpfc_sli4_sge_last, sgl, 0);
2071                 sgl->word2 = cpu_to_le32(sgl->word2);
2072                 /* Fill in word 3 / sgl_len during cmd submission */
2073
2074                 /* Initialize 64 bytes only */
2075                 memset(wqe, 0, sizeof(union lpfc_wqe));
2076
2077                 if (lpfc_ndlp_check_qdepth(phba, ndlp)) {
2078                         atomic_inc(&ndlp->cmd_pending);
2079                         lpfc_ncmd->flags |= LPFC_SBUF_BUMP_QDEPTH;
2080                 }
2081
2082         } else {
2083                 qp = &phba->sli4_hba.hdwq[idx];
2084                 qp->empty_io_bufs++;
2085         }
2086
2087         return  lpfc_ncmd;
2088 }
2089
2090 /**
2091  * lpfc_release_nvme_buf: Return a nvme buffer back to hba nvme buf list.
2092  * @phba: The Hba for which this call is being executed.
2093  * @lpfc_ncmd: The nvme buffer which is being released.
2094  *
2095  * This routine releases @lpfc_ncmd nvme buffer by adding it to tail of @phba
2096  * lpfc_io_buf_list list. For SLI4 XRI's are tied to the nvme buffer
2097  * and cannot be reused for at least RA_TOV amount of time if it was
2098  * aborted.
2099  **/
2100 static void
2101 lpfc_release_nvme_buf(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_ncmd)
2102 {
2103         struct lpfc_sli4_hdw_queue *qp;
2104         unsigned long iflag = 0;
2105
2106         if ((lpfc_ncmd->flags & LPFC_SBUF_BUMP_QDEPTH) && lpfc_ncmd->ndlp)
2107                 atomic_dec(&lpfc_ncmd->ndlp->cmd_pending);
2108
2109         lpfc_ncmd->ndlp = NULL;
2110         lpfc_ncmd->flags &= ~LPFC_SBUF_BUMP_QDEPTH;
2111
2112         qp = lpfc_ncmd->hdwq;
2113         if (unlikely(lpfc_ncmd->flags & LPFC_SBUF_XBUSY)) {
2114                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
2115                                 "6310 XB release deferred for "
2116                                 "ox_id x%x on reqtag x%x\n",
2117                                 lpfc_ncmd->cur_iocbq.sli4_xritag,
2118                                 lpfc_ncmd->cur_iocbq.iotag);
2119
2120                 spin_lock_irqsave(&qp->abts_io_buf_list_lock, iflag);
2121                 list_add_tail(&lpfc_ncmd->list,
2122                         &qp->lpfc_abts_io_buf_list);
2123                 qp->abts_nvme_io_bufs++;
2124                 spin_unlock_irqrestore(&qp->abts_io_buf_list_lock, iflag);
2125         } else
2126                 lpfc_release_io_buf(phba, (struct lpfc_io_buf *)lpfc_ncmd, qp);
2127 }
2128
2129 /**
2130  * lpfc_nvme_create_localport - Create/Bind an nvme localport instance.
2131  * @vport: the lpfc_vport instance requesting a localport.
2132  *
2133  * This routine is invoked to create an nvme localport instance to bind
2134  * to the nvme_fc_transport.  It is called once during driver load
2135  * like lpfc_create_shost after all other services are initialized.
2136  * It requires a vport, vpi, and wwns at call time.  Other localport
2137  * parameters are modified as the driver's FCID and the Fabric WWN
2138  * are established.
2139  *
2140  * Return codes
2141  *      0 - successful
2142  *      -ENOMEM - no heap memory available
2143  *      other values - from nvme registration upcall
2144  **/
2145 int
2146 lpfc_nvme_create_localport(struct lpfc_vport *vport)
2147 {
2148         int ret = 0;
2149         struct lpfc_hba  *phba = vport->phba;
2150         struct nvme_fc_port_info nfcp_info;
2151         struct nvme_fc_local_port *localport;
2152         struct lpfc_nvme_lport *lport;
2153
2154         /* Initialize this localport instance.  The vport wwn usage ensures
2155          * that NPIV is accounted for.
2156          */
2157         memset(&nfcp_info, 0, sizeof(struct nvme_fc_port_info));
2158         nfcp_info.port_role = FC_PORT_ROLE_NVME_INITIATOR;
2159         nfcp_info.node_name = wwn_to_u64(vport->fc_nodename.u.wwn);
2160         nfcp_info.port_name = wwn_to_u64(vport->fc_portname.u.wwn);
2161
2162         /* We need to tell the transport layer + 1 because it takes page
2163          * alignment into account. When space for the SGL is allocated we
2164          * allocate + 3, one for cmd, one for rsp and one for this alignment
2165          */
2166         lpfc_nvme_template.max_sgl_segments = phba->cfg_nvme_seg_cnt + 1;
2167
2168         /* Advertise how many hw queues we support based on cfg_hdw_queue,
2169          * which will not exceed cpu count.
2170          */
2171         lpfc_nvme_template.max_hw_queues = phba->cfg_hdw_queue;
2172
2173         if (!IS_ENABLED(CONFIG_NVME_FC))
2174                 return ret;
2175
2176         /* localport is allocated from the stack, but the registration
2177          * call allocates heap memory as well as the private area.
2178          */
2179
2180         ret = nvme_fc_register_localport(&nfcp_info, &lpfc_nvme_template,
2181                                          &vport->phba->pcidev->dev, &localport);
2182         if (!ret) {
2183                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME | LOG_NVME_DISC,
2184                                  "6005 Successfully registered local "
2185                                  "NVME port num %d, localP x%px, private "
2186                                  "x%px, sg_seg %d\n",
2187                                  localport->port_num, localport,
2188                                  localport->private,
2189                                  lpfc_nvme_template.max_sgl_segments);
2190
2191                 /* Private is our lport size declared in the template. */
2192                 lport = (struct lpfc_nvme_lport *)localport->private;
2193                 vport->localport = localport;
2194                 lport->vport = vport;
2195                 vport->nvmei_support = 1;
2196
2197                 atomic_set(&lport->xmt_fcp_noxri, 0);
2198                 atomic_set(&lport->xmt_fcp_bad_ndlp, 0);
2199                 atomic_set(&lport->xmt_fcp_qdepth, 0);
2200                 atomic_set(&lport->xmt_fcp_err, 0);
2201                 atomic_set(&lport->xmt_fcp_wqerr, 0);
2202                 atomic_set(&lport->xmt_fcp_abort, 0);
2203                 atomic_set(&lport->xmt_ls_abort, 0);
2204                 atomic_set(&lport->xmt_ls_err, 0);
2205                 atomic_set(&lport->cmpl_fcp_xb, 0);
2206                 atomic_set(&lport->cmpl_fcp_err, 0);
2207                 atomic_set(&lport->cmpl_ls_xb, 0);
2208                 atomic_set(&lport->cmpl_ls_err, 0);
2209
2210                 atomic_set(&lport->fc4NvmeLsRequests, 0);
2211                 atomic_set(&lport->fc4NvmeLsCmpls, 0);
2212         }
2213
2214         return ret;
2215 }
2216
2217 #if (IS_ENABLED(CONFIG_NVME_FC))
2218 /* lpfc_nvme_lport_unreg_wait - Wait for the host to complete an lport unreg.
2219  *
2220  * The driver has to wait for the host nvme transport to callback
2221  * indicating the localport has successfully unregistered all
2222  * resources.  Since this is an uninterruptible wait, loop every ten
2223  * seconds and print a message indicating no progress.
2224  *
2225  * An uninterruptible wait is used because of the risk of transport-to-
2226  * driver state mismatch.
2227  */
2228 static void
2229 lpfc_nvme_lport_unreg_wait(struct lpfc_vport *vport,
2230                            struct lpfc_nvme_lport *lport,
2231                            struct completion *lport_unreg_cmp)
2232 {
2233         u32 wait_tmo;
2234         int ret, i, pending = 0;
2235         struct lpfc_sli_ring  *pring;
2236         struct lpfc_hba  *phba = vport->phba;
2237         struct lpfc_sli4_hdw_queue *qp;
2238         int abts_scsi, abts_nvme;
2239
2240         /* Host transport has to clean up and confirm requiring an indefinite
2241          * wait. Print a message if a 10 second wait expires and renew the
2242          * wait. This is unexpected.
2243          */
2244         wait_tmo = msecs_to_jiffies(LPFC_NVME_WAIT_TMO * 1000);
2245         while (true) {
2246                 ret = wait_for_completion_timeout(lport_unreg_cmp, wait_tmo);
2247                 if (unlikely(!ret)) {
2248                         pending = 0;
2249                         abts_scsi = 0;
2250                         abts_nvme = 0;
2251                         for (i = 0; i < phba->cfg_hdw_queue; i++) {
2252                                 qp = &phba->sli4_hba.hdwq[i];
2253                                 if (!vport->localport || !qp || !qp->io_wq)
2254                                         return;
2255
2256                                 pring = qp->io_wq->pring;
2257                                 if (!pring)
2258                                         continue;
2259                                 pending += pring->txcmplq_cnt;
2260                                 abts_scsi += qp->abts_scsi_io_bufs;
2261                                 abts_nvme += qp->abts_nvme_io_bufs;
2262                         }
2263                         if (!vport->localport ||
2264                             test_bit(HBA_PCI_ERR, &vport->phba->bit_flags) ||
2265                             phba->link_state == LPFC_HBA_ERROR ||
2266                             test_bit(FC_UNLOADING, &vport->load_flag))
2267                                 return;
2268
2269                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
2270                                          "6176 Lport x%px Localport x%px wait "
2271                                          "timed out. Pending %d [%d:%d]. "
2272                                          "Renewing.\n",
2273                                          lport, vport->localport, pending,
2274                                          abts_scsi, abts_nvme);
2275                         continue;
2276                 }
2277                 break;
2278         }
2279         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
2280                          "6177 Lport x%px Localport x%px Complete Success\n",
2281                          lport, vport->localport);
2282 }
2283 #endif
2284
2285 /**
2286  * lpfc_nvme_destroy_localport - Destroy lpfc_nvme bound to nvme transport.
2287  * @vport: pointer to a host virtual N_Port data structure
2288  *
2289  * This routine is invoked to destroy all lports bound to the phba.
2290  * The lport memory was allocated by the nvme fc transport and is
2291  * released there.  This routine ensures all rports bound to the
2292  * lport have been disconnected.
2293  *
2294  **/
2295 void
2296 lpfc_nvme_destroy_localport(struct lpfc_vport *vport)
2297 {
2298 #if (IS_ENABLED(CONFIG_NVME_FC))
2299         struct nvme_fc_local_port *localport;
2300         struct lpfc_nvme_lport *lport;
2301         int ret;
2302         DECLARE_COMPLETION_ONSTACK(lport_unreg_cmp);
2303
2304         if (vport->nvmei_support == 0)
2305                 return;
2306
2307         localport = vport->localport;
2308         if (!localport)
2309                 return;
2310         lport = (struct lpfc_nvme_lport *)localport->private;
2311
2312         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
2313                          "6011 Destroying NVME localport x%px\n",
2314                          localport);
2315
2316         /* lport's rport list is clear.  Unregister
2317          * lport and release resources.
2318          */
2319         lport->lport_unreg_cmp = &lport_unreg_cmp;
2320         ret = nvme_fc_unregister_localport(localport);
2321
2322         /* Wait for completion.  This either blocks
2323          * indefinitely or succeeds
2324          */
2325         lpfc_nvme_lport_unreg_wait(vport, lport, &lport_unreg_cmp);
2326         vport->localport = NULL;
2327
2328         /* Regardless of the unregister upcall response, clear
2329          * nvmei_support.  All rports are unregistered and the
2330          * driver will clean up.
2331          */
2332         vport->nvmei_support = 0;
2333         if (ret == 0) {
2334                 lpfc_printf_vlog(vport,
2335                                  KERN_INFO, LOG_NVME_DISC,
2336                                  "6009 Unregistered lport Success\n");
2337         } else {
2338                 lpfc_printf_vlog(vport,
2339                                  KERN_INFO, LOG_NVME_DISC,
2340                                  "6010 Unregistered lport "
2341                                  "Failed, status x%x\n",
2342                                  ret);
2343         }
2344 #endif
2345 }
2346
2347 void
2348 lpfc_nvme_update_localport(struct lpfc_vport *vport)
2349 {
2350 #if (IS_ENABLED(CONFIG_NVME_FC))
2351         struct nvme_fc_local_port *localport;
2352         struct lpfc_nvme_lport *lport;
2353
2354         localport = vport->localport;
2355         if (!localport) {
2356                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_NVME,
2357                                  "6710 Update NVME fail. No localport\n");
2358                 return;
2359         }
2360         lport = (struct lpfc_nvme_lport *)localport->private;
2361         if (!lport) {
2362                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_NVME,
2363                                  "6171 Update NVME fail. localP x%px, No lport\n",
2364                                  localport);
2365                 return;
2366         }
2367         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
2368                          "6012 Update NVME lport x%px did x%x\n",
2369                          localport, vport->fc_myDID);
2370
2371         localport->port_id = vport->fc_myDID;
2372         if (localport->port_id == 0)
2373                 localport->port_role = FC_PORT_ROLE_NVME_DISCOVERY;
2374         else
2375                 localport->port_role = FC_PORT_ROLE_NVME_INITIATOR;
2376
2377         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
2378                          "6030 bound lport x%px to DID x%06x\n",
2379                          lport, localport->port_id);
2380 #endif
2381 }
2382
2383 int
2384 lpfc_nvme_register_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
2385 {
2386 #if (IS_ENABLED(CONFIG_NVME_FC))
2387         int ret = 0;
2388         struct nvme_fc_local_port *localport;
2389         struct lpfc_nvme_lport *lport;
2390         struct lpfc_nvme_rport *rport;
2391         struct lpfc_nvme_rport *oldrport;
2392         struct nvme_fc_remote_port *remote_port;
2393         struct nvme_fc_port_info rpinfo;
2394         struct lpfc_nodelist *prev_ndlp = NULL;
2395         struct fc_rport *srport = ndlp->rport;
2396
2397         lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_NVME_DISC,
2398                          "6006 Register NVME PORT. DID x%06x nlptype x%x\n",
2399                          ndlp->nlp_DID, ndlp->nlp_type);
2400
2401         localport = vport->localport;
2402         if (!localport)
2403                 return 0;
2404
2405         lport = (struct lpfc_nvme_lport *)localport->private;
2406
2407         /* NVME rports are not preserved across devloss.
2408          * Just register this instance.  Note, rpinfo->dev_loss_tmo
2409          * is left 0 to indicate accept transport defaults.  The
2410          * driver communicates port role capabilities consistent
2411          * with the PRLI response data.
2412          */
2413         memset(&rpinfo, 0, sizeof(struct nvme_fc_port_info));
2414         rpinfo.port_id = ndlp->nlp_DID;
2415         if (ndlp->nlp_type & NLP_NVME_TARGET)
2416                 rpinfo.port_role |= FC_PORT_ROLE_NVME_TARGET;
2417         if (ndlp->nlp_type & NLP_NVME_INITIATOR)
2418                 rpinfo.port_role |= FC_PORT_ROLE_NVME_INITIATOR;
2419
2420         if (ndlp->nlp_type & NLP_NVME_DISCOVERY)
2421                 rpinfo.port_role |= FC_PORT_ROLE_NVME_DISCOVERY;
2422
2423         rpinfo.port_name = wwn_to_u64(ndlp->nlp_portname.u.wwn);
2424         rpinfo.node_name = wwn_to_u64(ndlp->nlp_nodename.u.wwn);
2425         if (srport)
2426                 rpinfo.dev_loss_tmo = srport->dev_loss_tmo;
2427         else
2428                 rpinfo.dev_loss_tmo = vport->cfg_devloss_tmo;
2429
2430         spin_lock_irq(&ndlp->lock);
2431
2432         /* If an oldrport exists, so does the ndlp reference.  If not
2433          * a new reference is needed because either the node has never
2434          * been registered or it's been unregistered and getting deleted.
2435          */
2436         oldrport = lpfc_ndlp_get_nrport(ndlp);
2437         if (oldrport) {
2438                 prev_ndlp = oldrport->ndlp;
2439                 spin_unlock_irq(&ndlp->lock);
2440         } else {
2441                 spin_unlock_irq(&ndlp->lock);
2442                 if (!lpfc_nlp_get(ndlp)) {
2443                         dev_warn(&vport->phba->pcidev->dev,
2444                                  "Warning - No node ref - exit register\n");
2445                         return 0;
2446                 }
2447         }
2448
2449         ret = nvme_fc_register_remoteport(localport, &rpinfo, &remote_port);
2450         if (!ret) {
2451                 /* If the ndlp already has an nrport, this is just
2452                  * a resume of the existing rport.  Else this is a
2453                  * new rport.
2454                  */
2455                 /* Guard against an unregister/reregister
2456                  * race that leaves the WAIT flag set.
2457                  */
2458                 spin_lock_irq(&ndlp->lock);
2459                 ndlp->fc4_xpt_flags &= ~NVME_XPT_UNREG_WAIT;
2460                 ndlp->fc4_xpt_flags |= NVME_XPT_REGD;
2461                 spin_unlock_irq(&ndlp->lock);
2462                 rport = remote_port->private;
2463                 if (oldrport) {
2464
2465                         /* Sever the ndlp<->rport association
2466                          * before dropping the ndlp ref from
2467                          * register.
2468                          */
2469                         spin_lock_irq(&ndlp->lock);
2470                         ndlp->nrport = NULL;
2471                         ndlp->fc4_xpt_flags &= ~NVME_XPT_UNREG_WAIT;
2472                         spin_unlock_irq(&ndlp->lock);
2473                         rport->ndlp = NULL;
2474                         rport->remoteport = NULL;
2475
2476                         /* Reference only removed if previous NDLP is no longer
2477                          * active. It might be just a swap and removing the
2478                          * reference would cause a premature cleanup.
2479                          */
2480                         if (prev_ndlp && prev_ndlp != ndlp) {
2481                                 if (!prev_ndlp->nrport)
2482                                         lpfc_nlp_put(prev_ndlp);
2483                         }
2484                 }
2485
2486                 /* Clean bind the rport to the ndlp. */
2487                 rport->remoteport = remote_port;
2488                 rport->lport = lport;
2489                 rport->ndlp = ndlp;
2490                 spin_lock_irq(&ndlp->lock);
2491                 ndlp->nrport = rport;
2492                 spin_unlock_irq(&ndlp->lock);
2493                 lpfc_printf_vlog(vport, KERN_INFO,
2494                                  LOG_NVME_DISC | LOG_NODE,
2495                                  "6022 Bind lport x%px to remoteport x%px "
2496                                  "rport x%px WWNN 0x%llx, "
2497                                  "Rport WWPN 0x%llx DID "
2498                                  "x%06x Role x%x, ndlp %p prev_ndlp x%px\n",
2499                                  lport, remote_port, rport,
2500                                  rpinfo.node_name, rpinfo.port_name,
2501                                  rpinfo.port_id, rpinfo.port_role,
2502                                  ndlp, prev_ndlp);
2503         } else {
2504                 lpfc_printf_vlog(vport, KERN_ERR,
2505                                  LOG_TRACE_EVENT,
2506                                  "6031 RemotePort Registration failed "
2507                                  "err: %d, DID x%06x ref %u\n",
2508                                  ret, ndlp->nlp_DID, kref_read(&ndlp->kref));
2509                 lpfc_nlp_put(ndlp);
2510         }
2511
2512         return ret;
2513 #else
2514         return 0;
2515 #endif
2516 }
2517
2518 /*
2519  * lpfc_nvme_rescan_port - Check to see if we should rescan this remoteport
2520  *
2521  * If the ndlp represents an NVME Target, that we are logged into,
2522  * ping the NVME FC Transport layer to initiate a device rescan
2523  * on this remote NPort.
2524  */
2525 void
2526 lpfc_nvme_rescan_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
2527 {
2528 #if (IS_ENABLED(CONFIG_NVME_FC))
2529         struct lpfc_nvme_rport *nrport;
2530         struct nvme_fc_remote_port *remoteport = NULL;
2531
2532         spin_lock_irq(&ndlp->lock);
2533         nrport = lpfc_ndlp_get_nrport(ndlp);
2534         if (nrport)
2535                 remoteport = nrport->remoteport;
2536         spin_unlock_irq(&ndlp->lock);
2537
2538         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
2539                          "6170 Rescan NPort DID x%06x type x%x "
2540                          "state x%x nrport x%px remoteport x%px\n",
2541                          ndlp->nlp_DID, ndlp->nlp_type, ndlp->nlp_state,
2542                          nrport, remoteport);
2543
2544         if (!nrport || !remoteport)
2545                 goto rescan_exit;
2546
2547         /* Rescan an NVME target in MAPPED state with DISCOVERY role set */
2548         if (remoteport->port_role & FC_PORT_ROLE_NVME_DISCOVERY &&
2549             ndlp->nlp_state == NLP_STE_MAPPED_NODE) {
2550                 nvme_fc_rescan_remoteport(remoteport);
2551
2552                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
2553                                  "6172 NVME rescanned DID x%06x "
2554                                  "port_state x%x\n",
2555                                  ndlp->nlp_DID, remoteport->port_state);
2556         }
2557         return;
2558  rescan_exit:
2559         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
2560                          "6169 Skip NVME Rport Rescan, NVME remoteport "
2561                          "unregistered\n");
2562 #endif
2563 }
2564
2565 /* lpfc_nvme_unregister_port - unbind the DID and port_role from this rport.
2566  *
2567  * There is no notion of Devloss or rport recovery from the current
2568  * nvme_transport perspective.  Loss of an rport just means IO cannot
2569  * be sent and recovery is completely up to the initator.
2570  * For now, the driver just unbinds the DID and port_role so that
2571  * no further IO can be issued.
2572  */
2573 void
2574 lpfc_nvme_unregister_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
2575 {
2576 #if (IS_ENABLED(CONFIG_NVME_FC))
2577         int ret;
2578         struct nvme_fc_local_port *localport;
2579         struct lpfc_nvme_lport *lport;
2580         struct lpfc_nvme_rport *rport;
2581         struct nvme_fc_remote_port *remoteport = NULL;
2582
2583         localport = vport->localport;
2584
2585         /* This is fundamental error.  The localport is always
2586          * available until driver unload.  Just exit.
2587          */
2588         if (!localport)
2589                 return;
2590
2591         lport = (struct lpfc_nvme_lport *)localport->private;
2592         if (!lport)
2593                 goto input_err;
2594
2595         spin_lock_irq(&ndlp->lock);
2596         rport = lpfc_ndlp_get_nrport(ndlp);
2597         if (rport)
2598                 remoteport = rport->remoteport;
2599         spin_unlock_irq(&ndlp->lock);
2600         if (!remoteport)
2601                 goto input_err;
2602
2603         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
2604                          "6033 Unreg nvme remoteport x%px, portname x%llx, "
2605                          "port_id x%06x, portstate x%x port type x%x "
2606                          "refcnt %d\n",
2607                          remoteport, remoteport->port_name,
2608                          remoteport->port_id, remoteport->port_state,
2609                          ndlp->nlp_type, kref_read(&ndlp->kref));
2610
2611         /* Sanity check ndlp type.  Only call for NVME ports. Don't
2612          * clear any rport state until the transport calls back.
2613          */
2614
2615         if (ndlp->nlp_type & NLP_NVME_TARGET) {
2616                 /* No concern about the role change on the nvme remoteport.
2617                  * The transport will update it.
2618                  */
2619                 spin_lock_irq(&ndlp->lock);
2620                 ndlp->fc4_xpt_flags |= NVME_XPT_UNREG_WAIT;
2621                 spin_unlock_irq(&ndlp->lock);
2622
2623                 /* Don't let the host nvme transport keep sending keep-alives
2624                  * on this remoteport. Vport is unloading, no recovery. The
2625                  * return values is ignored.  The upcall is a courtesy to the
2626                  * transport.
2627                  */
2628                 if (test_bit(FC_UNLOADING, &vport->load_flag) ||
2629                     unlikely(vport->phba->link_state == LPFC_HBA_ERROR))
2630                         (void)nvme_fc_set_remoteport_devloss(remoteport, 0);
2631
2632                 ret = nvme_fc_unregister_remoteport(remoteport);
2633
2634                 /* The driver no longer knows if the nrport memory is valid.
2635                  * because the controller teardown process has begun and
2636                  * is asynchronous.  Break the binding in the ndlp. Also
2637                  * remove the register ndlp reference to setup node release.
2638                  */
2639                 ndlp->nrport = NULL;
2640                 lpfc_nlp_put(ndlp);
2641                 if (ret != 0) {
2642                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
2643                                          "6167 NVME unregister failed %d "
2644                                          "port_state x%x\n",
2645                                          ret, remoteport->port_state);
2646
2647                         if (test_bit(FC_UNLOADING, &vport->load_flag)) {
2648                                 /* Only 1 thread can drop the initial node
2649                                  * reference. Check if another thread has set
2650                                  * NLP_DROPPED.
2651                                  */
2652                                 spin_lock_irq(&ndlp->lock);
2653                                 if (!(ndlp->nlp_flag & NLP_DROPPED)) {
2654                                         ndlp->nlp_flag |= NLP_DROPPED;
2655                                         spin_unlock_irq(&ndlp->lock);
2656                                         lpfc_nlp_put(ndlp);
2657                                         return;
2658                                 }
2659                                 spin_unlock_irq(&ndlp->lock);
2660                         }
2661                 }
2662         }
2663         return;
2664
2665  input_err:
2666 #endif
2667         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
2668                          "6168 State error: lport x%px, rport x%px FCID x%06x\n",
2669                          vport->localport, ndlp->rport, ndlp->nlp_DID);
2670 }
2671
2672 /**
2673  * lpfc_sli4_nvme_pci_offline_aborted - Fast-path process of NVME xri abort
2674  * @phba: pointer to lpfc hba data structure.
2675  * @lpfc_ncmd: The nvme job structure for the request being aborted.
2676  *
2677  * This routine is invoked by the worker thread to process a SLI4 fast-path
2678  * NVME aborted xri.  Aborted NVME IO commands are completed to the transport
2679  * here.
2680  **/
2681 void
2682 lpfc_sli4_nvme_pci_offline_aborted(struct lpfc_hba *phba,
2683                                    struct lpfc_io_buf *lpfc_ncmd)
2684 {
2685         struct nvmefc_fcp_req *nvme_cmd = NULL;
2686
2687         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
2688                         "6533 %s nvme_cmd %p tag x%x abort complete and "
2689                         "xri released\n", __func__,
2690                         lpfc_ncmd->nvmeCmd,
2691                         lpfc_ncmd->cur_iocbq.iotag);
2692
2693         /* Aborted NVME commands are required to not complete
2694          * before the abort exchange command fully completes.
2695          * Once completed, it is available via the put list.
2696          */
2697         if (lpfc_ncmd->nvmeCmd) {
2698                 nvme_cmd = lpfc_ncmd->nvmeCmd;
2699                 nvme_cmd->transferred_length = 0;
2700                 nvme_cmd->rcv_rsplen = 0;
2701                 nvme_cmd->status = NVME_SC_INTERNAL;
2702                 nvme_cmd->done(nvme_cmd);
2703                 lpfc_ncmd->nvmeCmd = NULL;
2704         }
2705         lpfc_release_nvme_buf(phba, lpfc_ncmd);
2706 }
2707
2708 /**
2709  * lpfc_sli4_nvme_xri_aborted - Fast-path process of NVME xri abort
2710  * @phba: pointer to lpfc hba data structure.
2711  * @axri: pointer to the fcp xri abort wcqe structure.
2712  * @lpfc_ncmd: The nvme job structure for the request being aborted.
2713  *
2714  * This routine is invoked by the worker thread to process a SLI4 fast-path
2715  * NVME aborted xri.  Aborted NVME IO commands are completed to the transport
2716  * here.
2717  **/
2718 void
2719 lpfc_sli4_nvme_xri_aborted(struct lpfc_hba *phba,
2720                            struct sli4_wcqe_xri_aborted *axri,
2721                            struct lpfc_io_buf *lpfc_ncmd)
2722 {
2723         uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
2724         struct nvmefc_fcp_req *nvme_cmd = NULL;
2725         struct lpfc_nodelist *ndlp = lpfc_ncmd->ndlp;
2726
2727
2728         if (ndlp)
2729                 lpfc_sli4_abts_err_handler(phba, ndlp, axri);
2730
2731         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
2732                         "6311 nvme_cmd %p xri x%x tag x%x abort complete and "
2733                         "xri released\n",
2734                         lpfc_ncmd->nvmeCmd, xri,
2735                         lpfc_ncmd->cur_iocbq.iotag);
2736
2737         /* Aborted NVME commands are required to not complete
2738          * before the abort exchange command fully completes.
2739          * Once completed, it is available via the put list.
2740          */
2741         if (lpfc_ncmd->nvmeCmd) {
2742                 nvme_cmd = lpfc_ncmd->nvmeCmd;
2743                 nvme_cmd->done(nvme_cmd);
2744                 lpfc_ncmd->nvmeCmd = NULL;
2745         }
2746         lpfc_release_nvme_buf(phba, lpfc_ncmd);
2747 }
2748
2749 /**
2750  * lpfc_nvme_wait_for_io_drain - Wait for all NVME wqes to complete
2751  * @phba: Pointer to HBA context object.
2752  *
2753  * This function flushes all wqes in the nvme rings and frees all resources
2754  * in the txcmplq. This function does not issue abort wqes for the IO
2755  * commands in txcmplq, they will just be returned with
2756  * IOERR_SLI_DOWN. This function is invoked with EEH when device's PCI
2757  * slot has been permanently disabled.
2758  **/
2759 void
2760 lpfc_nvme_wait_for_io_drain(struct lpfc_hba *phba)
2761 {
2762         struct lpfc_sli_ring  *pring;
2763         u32 i, wait_cnt = 0;
2764
2765         if (phba->sli_rev < LPFC_SLI_REV4 || !phba->sli4_hba.hdwq)
2766                 return;
2767
2768         /* Cycle through all IO rings and make sure all outstanding
2769          * WQEs have been removed from the txcmplqs.
2770          */
2771         for (i = 0; i < phba->cfg_hdw_queue; i++) {
2772                 if (!phba->sli4_hba.hdwq[i].io_wq)
2773                         continue;
2774                 pring = phba->sli4_hba.hdwq[i].io_wq->pring;
2775
2776                 if (!pring)
2777                         continue;
2778
2779                 /* Retrieve everything on the txcmplq */
2780                 while (!list_empty(&pring->txcmplq)) {
2781                         msleep(LPFC_XRI_EXCH_BUSY_WAIT_T1);
2782                         wait_cnt++;
2783
2784                         /* The sleep is 10mS.  Every ten seconds,
2785                          * dump a message.  Something is wrong.
2786                          */
2787                         if ((wait_cnt % 1000) == 0) {
2788                                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2789                                                 "6178 NVME IO not empty, "
2790                                                 "cnt %d\n", wait_cnt);
2791                         }
2792                 }
2793         }
2794
2795         /* Make sure HBA is alive */
2796         lpfc_issue_hb_tmo(phba);
2797
2798 }
2799
2800 void
2801 lpfc_nvme_cancel_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *pwqeIn,
2802                       uint32_t stat, uint32_t param)
2803 {
2804 #if (IS_ENABLED(CONFIG_NVME_FC))
2805         struct lpfc_io_buf *lpfc_ncmd;
2806         struct nvmefc_fcp_req *nCmd;
2807         struct lpfc_wcqe_complete wcqe;
2808         struct lpfc_wcqe_complete *wcqep = &wcqe;
2809
2810         lpfc_ncmd = pwqeIn->io_buf;
2811         if (!lpfc_ncmd) {
2812                 lpfc_sli_release_iocbq(phba, pwqeIn);
2813                 return;
2814         }
2815         /* For abort iocb just return, IO iocb will do a done call */
2816         if (bf_get(wqe_cmnd, &pwqeIn->wqe.gen_req.wqe_com) ==
2817             CMD_ABORT_XRI_CX) {
2818                 lpfc_sli_release_iocbq(phba, pwqeIn);
2819                 return;
2820         }
2821
2822         spin_lock(&lpfc_ncmd->buf_lock);
2823         nCmd = lpfc_ncmd->nvmeCmd;
2824         if (!nCmd) {
2825                 spin_unlock(&lpfc_ncmd->buf_lock);
2826                 lpfc_release_nvme_buf(phba, lpfc_ncmd);
2827                 return;
2828         }
2829         spin_unlock(&lpfc_ncmd->buf_lock);
2830
2831         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
2832                         "6194 NVME Cancel xri %x\n",
2833                         lpfc_ncmd->cur_iocbq.sli4_xritag);
2834
2835         wcqep->word0 = 0;
2836         bf_set(lpfc_wcqe_c_status, wcqep, stat);
2837         wcqep->parameter = param;
2838         wcqep->total_data_placed = 0;
2839         wcqep->word3 = 0; /* xb is 0 */
2840
2841         /* Call release with XB=1 to queue the IO into the abort list. */
2842         if (phba->sli.sli_flag & LPFC_SLI_ACTIVE)
2843                 bf_set(lpfc_wcqe_c_xb, wcqep, 1);
2844
2845         memcpy(&pwqeIn->wcqe_cmpl, wcqep, sizeof(*wcqep));
2846         (pwqeIn->cmd_cmpl)(phba, pwqeIn, pwqeIn);
2847 #endif
2848 }