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 Broadcom. All Rights Reserved. The term      *
   5  * “Broadcom” refers to Broadcom Limited and/or its subsidiaries.  *
   6  * Copyright (C) 2004-2016 Emulex.  All rights reserved.           *
   7  * EMULEX and SLI are trademarks of Emulex.                        *
   8  * www.broadcom.com                                                *
   9  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
  10  *                                                                 *
  11  * This program is free software; you can redistribute it and/or   *
  12  * modify it under the terms of version 2 of the GNU General       *
  13  * Public License as published by the Free Software Foundation.    *
  14  * This program is distributed in the hope that it will be useful. *
  15  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  16  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  17  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  18  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  19  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  20  * more details, a copy of which can be found in the file COPYING  *
  21  * included with this package.                                     *
  22  ********************************************************************/
  23 #include <linux/pci.h>
  24 #include <linux/slab.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/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 <linux/nvme.h>
  40 #include <linux/nvme-fc-driver.h>
  41 #include <linux/nvme-fc.h>
  42 #include "lpfc_version.h"
  43 #include "lpfc_hw4.h"
  44 #include "lpfc_hw.h"
  45 #include "lpfc_sli.h"
  46 #include "lpfc_sli4.h"
  47 #include "lpfc_nl.h"
  48 #include "lpfc_disc.h"
  49 #include "lpfc.h"
  50 #include "lpfc_nvme.h"
  51 #include "lpfc_scsi.h"
  52 #include "lpfc_logmsg.h"
  53 #include "lpfc_crtn.h"
  54 #include "lpfc_vport.h"
  55 #include "lpfc_debugfs.h"
  56
  57 /* NVME initiator-based functions */
  58
  59 static struct lpfc_nvme_buf *
  60 lpfc_get_nvme_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp);
  61
  62 static void
  63 lpfc_release_nvme_buf(struct lpfc_hba *, struct lpfc_nvme_buf *);
  64
  65
  66 /**
  67  * lpfc_nvme_create_queue -
  68  * @lpfc_pnvme: Pointer to the driver's nvme instance data
  69  * @qidx: An cpu index used to affinitize IO queues and MSIX vectors.
  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         lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
  92         vport = lport->vport;
  93         qhandle = kzalloc(sizeof(struct lpfc_nvme_qhandle), GFP_KERNEL);
  94         if (qhandle == NULL)
  95                 return -ENOMEM;
  96
  97         qhandle->cpu_id = smp_processor_id();
  98         qhandle->qidx = qidx;
  99         /*
 100          * NVME qidx == 0 is the admin queue, so both admin queue
 101          * and first IO queue will use MSI-X vector and associated
 102          * EQ/CQ/WQ at index 0. After that they are sequentially assigned.
 103          */
 104         if (qidx) {
 105                 str = "IO ";  /* IO queue */
 106                 qhandle->index = ((qidx - 1) %
 107                         vport->phba->cfg_nvme_io_channel);
 108         } else {
 109                 str = "ADM";  /* Admin queue */
 110                 qhandle->index = qidx;
 111         }
 112
 113         lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME,
 114                          "6073 Binding %s HdwQueue %d  (cpu %d) to "
 115                          "io_channel %d qhandle %p\n", str,
 116                          qidx, qhandle->cpu_id, qhandle->index, qhandle);
 117         *handle = (void *)qhandle;
 118         return 0;
 119 }
 120
 121 /**
 122  * lpfc_nvme_delete_queue -
 123  * @lpfc_pnvme: Pointer to the driver's nvme instance data
 124  * @qidx: An cpu index used to affinitize IO queues and MSIX vectors.
 125  * @handle: An opaque driver handle from lpfc_nvme_create_queue
 126  *
 127  * Driver registers this routine to free
 128  * any internal data structures to bind the @qidx to its internal
 129  * IO queues.
 130  *
 131  * Return value :
 132  *   0 - Success
 133  *   TODO:  What are the failure codes.
 134  **/
 135 static void
 136 lpfc_nvme_delete_queue(struct nvme_fc_local_port *pnvme_lport,
 137                        unsigned int qidx,
 138                        void *handle)
 139 {
 140         struct lpfc_nvme_lport *lport;
 141         struct lpfc_vport *vport;
 142
 143         lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
 144         vport = lport->vport;
 145
 146         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
 147                         "6001 ENTER.  lpfc_pnvme %p, qidx x%xi qhandle %p\n",
 148                         lport, qidx, handle);
 149         kfree(handle);
 150 }
 151
 152 static void
 153 lpfc_nvme_localport_delete(struct nvme_fc_local_port *localport)
 154 {
 155         struct lpfc_nvme_lport *lport = localport->private;
 156
 157         /* release any threads waiting for the unreg to complete */
 158         complete(&lport->lport_unreg_done);
 159 }
 160
 161 /* lpfc_nvme_remoteport_delete
 162  *
 163  * @remoteport: Pointer to an nvme transport remoteport instance.
 164  *
 165  * This is a template downcall.  NVME transport calls this function
 166  * when it has completed the unregistration of a previously
 167  * registered remoteport.
 168  *
 169  * Return value :
 170  * None
 171  */
 172 void
 173 lpfc_nvme_remoteport_delete(struct nvme_fc_remote_port *remoteport)
 174 {
 175         struct lpfc_nvme_rport *rport = remoteport->private;
 176         struct lpfc_vport *vport;
 177         struct lpfc_nodelist *ndlp;
 178
 179         ndlp = rport->ndlp;
 180         if (!ndlp)
 181                 goto rport_err;
 182
 183         vport = ndlp->vport;
 184         if (!vport)
 185                 goto rport_err;
 186
 187         /* Remove this rport from the lport's list - memory is owned by the
 188          * transport. Remove the ndlp reference for the NVME transport before
 189          * calling state machine to remove the node, this is devloss = 0
 190          * semantics.
 191          */
 192         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
 193                         "6146 remoteport delete complete %p\n",
 194                         remoteport);
 195         list_del(&rport->list);
 196         lpfc_nlp_put(ndlp);
 197
 198  rport_err:
 199         /* This call has to execute as long as the rport is valid.
 200          * Release any threads waiting for the unreg to complete.
 201          */
 202         complete(&rport->rport_unreg_done);
 203 }
 204
 205 static void
 206 lpfc_nvme_cmpl_gen_req(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
 207                        struct lpfc_wcqe_complete *wcqe)
 208 {
 209         struct lpfc_vport *vport = cmdwqe->vport;
 210         uint32_t status;
 211         struct nvmefc_ls_req *pnvme_lsreq;
 212         struct lpfc_dmabuf *buf_ptr;
 213         struct lpfc_nodelist *ndlp;
 214
 215         vport->phba->fc4NvmeLsCmpls++;
 216
 217         pnvme_lsreq = (struct nvmefc_ls_req *)cmdwqe->context2;
 218         status = bf_get(lpfc_wcqe_c_status, wcqe) & LPFC_IOCB_STATUS_MASK;
 219         ndlp = (struct lpfc_nodelist *)cmdwqe->context1;
 220         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
 221                          "6047 nvme cmpl Enter "
 222                          "Data %p DID %x Xri: %x status %x cmd:%p lsreg:%p "
 223                          "bmp:%p ndlp:%p\n",
 224                          pnvme_lsreq, ndlp ? ndlp->nlp_DID : 0,
 225                          cmdwqe->sli4_xritag, status,
 226                          cmdwqe, pnvme_lsreq, cmdwqe->context3, ndlp);
 227
 228         lpfc_nvmeio_data(phba, "NVME LS  CMPL: xri x%x stat x%x parm x%x\n",
 229                          cmdwqe->sli4_xritag, status, wcqe->parameter);
 230
 231         if (cmdwqe->context3) {
 232                 buf_ptr = (struct lpfc_dmabuf *)cmdwqe->context3;
 233                 lpfc_mbuf_free(phba, buf_ptr->virt, buf_ptr->phys);
 234                 kfree(buf_ptr);
 235                 cmdwqe->context3 = NULL;
 236         }
 237         if (pnvme_lsreq->done)
 238                 pnvme_lsreq->done(pnvme_lsreq, status);
 239         else
 240                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
 241                                  "6046 nvme cmpl without done call back? "
 242                                  "Data %p DID %x Xri: %x status %x\n",
 243                                 pnvme_lsreq, ndlp ? ndlp->nlp_DID : 0,
 244                                 cmdwqe->sli4_xritag, status);
 245         if (ndlp) {
 246                 lpfc_nlp_put(ndlp);
 247                 cmdwqe->context1 = NULL;
 248         }
 249         lpfc_sli_release_iocbq(phba, cmdwqe);
 250 }
 251
 252 static int
 253 lpfc_nvme_gen_req(struct lpfc_vport *vport, struct lpfc_dmabuf *bmp,
 254                   struct lpfc_dmabuf *inp,
 255                  struct nvmefc_ls_req *pnvme_lsreq,
 256              void (*cmpl)(struct lpfc_hba *, struct lpfc_iocbq *,
 257                            struct lpfc_wcqe_complete *),
 258              struct lpfc_nodelist *ndlp, uint32_t num_entry,
 259              uint32_t tmo, uint8_t retry)
 260 {
 261         struct lpfc_hba  *phba = vport->phba;
 262         union lpfc_wqe *wqe;
 263         struct lpfc_iocbq *genwqe;
 264         struct ulp_bde64 *bpl;
 265         struct ulp_bde64 bde;
 266         int i, rc, xmit_len, first_len;
 267
 268         /* Allocate buffer for  command WQE */
 269         genwqe = lpfc_sli_get_iocbq(phba);
 270         if (genwqe == NULL)
 271                 return 1;
 272
 273         wqe = &genwqe->wqe;
 274         memset(wqe, 0, sizeof(union lpfc_wqe));
 275
 276         genwqe->context3 = (uint8_t *)bmp;
 277         genwqe->iocb_flag |= LPFC_IO_NVME_LS;
 278
 279         /* Save for completion so we can release these resources */
 280         genwqe->context1 = lpfc_nlp_get(ndlp);
 281         genwqe->context2 = (uint8_t *)pnvme_lsreq;
 282         /* Fill in payload, bp points to frame payload */
 283
 284         if (!tmo)
 285                 /* FC spec states we need 3 * ratov for CT requests */
 286                 tmo = (3 * phba->fc_ratov);
 287
 288         /* For this command calculate the xmit length of the request bde. */
 289         xmit_len = 0;
 290         first_len = 0;
 291         bpl = (struct ulp_bde64 *)bmp->virt;
 292         for (i = 0; i < num_entry; i++) {
 293                 bde.tus.w = bpl[i].tus.w;
 294                 if (bde.tus.f.bdeFlags != BUFF_TYPE_BDE_64)
 295                         break;
 296                 xmit_len += bde.tus.f.bdeSize;
 297                 if (i == 0)
 298                         first_len = xmit_len;
 299         }
 300
 301         genwqe->rsvd2 = num_entry;
 302         genwqe->hba_wqidx = 0;
 303
 304         /* Words 0 - 2 */
 305         wqe->generic.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 306         wqe->generic.bde.tus.f.bdeSize = first_len;
 307         wqe->generic.bde.addrLow = bpl[0].addrLow;
 308         wqe->generic.bde.addrHigh = bpl[0].addrHigh;
 309
 310         /* Word 3 */
 311         wqe->gen_req.request_payload_len = first_len;
 312
 313         /* Word 4 */
 314
 315         /* Word 5 */
 316         bf_set(wqe_dfctl, &wqe->gen_req.wge_ctl, 0);
 317         bf_set(wqe_si, &wqe->gen_req.wge_ctl, 1);
 318         bf_set(wqe_la, &wqe->gen_req.wge_ctl, 1);
 319         bf_set(wqe_rctl, &wqe->gen_req.wge_ctl, FC_RCTL_ELS4_REQ);
 320         bf_set(wqe_type, &wqe->gen_req.wge_ctl, FC_TYPE_NVME);
 321
 322         /* Word 6 */
 323         bf_set(wqe_ctxt_tag, &wqe->gen_req.wqe_com,
 324                phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
 325         bf_set(wqe_xri_tag, &wqe->gen_req.wqe_com, genwqe->sli4_xritag);
 326
 327         /* Word 7 */
 328         bf_set(wqe_tmo, &wqe->gen_req.wqe_com, (vport->phba->fc_ratov-1));
 329         bf_set(wqe_class, &wqe->gen_req.wqe_com, CLASS3);
 330         bf_set(wqe_cmnd, &wqe->gen_req.wqe_com, CMD_GEN_REQUEST64_WQE);
 331         bf_set(wqe_ct, &wqe->gen_req.wqe_com, SLI4_CT_RPI);
 332
 333         /* Word 8 */
 334         wqe->gen_req.wqe_com.abort_tag = genwqe->iotag;
 335
 336         /* Word 9 */
 337         bf_set(wqe_reqtag, &wqe->gen_req.wqe_com, genwqe->iotag);
 338
 339         /* Word 10 */
 340         bf_set(wqe_dbde, &wqe->gen_req.wqe_com, 1);
 341         bf_set(wqe_iod, &wqe->gen_req.wqe_com, LPFC_WQE_IOD_READ);
 342         bf_set(wqe_qosd, &wqe->gen_req.wqe_com, 1);
 343         bf_set(wqe_lenloc, &wqe->gen_req.wqe_com, LPFC_WQE_LENLOC_NONE);
 344         bf_set(wqe_ebde_cnt, &wqe->gen_req.wqe_com, 0);
 345
 346         /* Word 11 */
 347         bf_set(wqe_cqid, &wqe->gen_req.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
 348         bf_set(wqe_cmd_type, &wqe->gen_req.wqe_com, OTHER_COMMAND);
 349
 350
 351         /* Issue GEN REQ WQE for NPORT <did> */
 352         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
 353                          "6050 Issue GEN REQ WQE to NPORT x%x "
 354                          "Data: x%x x%x wq:%p lsreq:%p bmp:%p xmit:%d 1st:%d\n",
 355                          ndlp->nlp_DID, genwqe->iotag,
 356                          vport->port_state,
 357                         genwqe, pnvme_lsreq, bmp, xmit_len, first_len);
 358         genwqe->wqe_cmpl = cmpl;
 359         genwqe->iocb_cmpl = NULL;
 360         genwqe->drvrTimeout = tmo + LPFC_DRVR_TIMEOUT;
 361         genwqe->vport = vport;
 362         genwqe->retry = retry;
 363
 364         lpfc_nvmeio_data(phba, "NVME LS  XMIT: xri x%x iotag x%x to x%06x\n",
 365                          genwqe->sli4_xritag, genwqe->iotag, ndlp->nlp_DID);
 366
 367         rc = lpfc_sli4_issue_wqe(phba, LPFC_ELS_RING, genwqe);
 368         if (rc == WQE_ERROR) {
 369                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 370                                  "6045 Issue GEN REQ WQE to NPORT x%x "
 371                                  "Data: x%x x%x\n",
 372                                  ndlp->nlp_DID, genwqe->iotag,
 373                                  vport->port_state);
 374                 lpfc_sli_release_iocbq(phba, genwqe);
 375                 return 1;
 376         }
 377         return 0;
 378 }
 379
 380 /**
 381  * lpfc_nvme_ls_req - Issue an Link Service request
 382  * @lpfc_pnvme: Pointer to the driver's nvme instance data
 383  * @lpfc_nvme_lport: Pointer to the driver's local port data
 384  * @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
 385  *
 386  * Driver registers this routine to handle any link service request
 387  * from the nvme_fc transport to a remote nvme-aware port.
 388  *
 389  * Return value :
 390  *   0 - Success
 391  *   TODO: What are the failure codes.
 392  **/
 393 static int
 394 lpfc_nvme_ls_req(struct nvme_fc_local_port *pnvme_lport,
 395                  struct nvme_fc_remote_port *pnvme_rport,
 396                  struct nvmefc_ls_req *pnvme_lsreq)
 397 {
 398         int ret = 0;
 399         struct lpfc_nvme_lport *lport;
 400         struct lpfc_vport *vport;
 401         struct lpfc_nodelist *ndlp;
 402         struct ulp_bde64 *bpl;
 403         struct lpfc_dmabuf *bmp;
 404
 405         /* there are two dma buf in the request, actually there is one and
 406          * the second one is just the start address + cmd size.
 407          * Before calling lpfc_nvme_gen_req these buffers need to be wrapped
 408          * in a lpfc_dmabuf struct. When freeing we just free the wrapper
 409          * because the nvem layer owns the data bufs.
 410          * We do not have to break these packets open, we don't care what is in
 411          * them. And we do not have to look at the resonse data, we only care
 412          * that we got a response. All of the caring is going to happen in the
 413          * nvme-fc layer.
 414          */
 415
 416         lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
 417         vport = lport->vport;
 418
 419         ndlp = lpfc_findnode_did(vport, pnvme_rport->port_id);
 420         if (!ndlp) {
 421                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
 422                                  "6043 Could not find node for DID %x\n",
 423                                  pnvme_rport->port_id);
 424                 return 1;
 425         }
 426         bmp = kmalloc(sizeof(struct lpfc_dmabuf), GFP_KERNEL);
 427         if (!bmp) {
 428
 429                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
 430                                  "6044 Could not find node for DID %x\n",
 431                                  pnvme_rport->port_id);
 432                 return 2;
 433         }
 434         INIT_LIST_HEAD(&bmp->list);
 435         bmp->virt = lpfc_mbuf_alloc(vport->phba, MEM_PRI, &(bmp->phys));
 436         if (!bmp->virt) {
 437                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
 438                                  "6042 Could not find node for DID %x\n",
 439                                  pnvme_rport->port_id);
 440                 kfree(bmp);
 441                 return 3;
 442         }
 443         bpl = (struct ulp_bde64 *)bmp->virt;
 444         bpl->addrHigh = le32_to_cpu(putPaddrHigh(pnvme_lsreq->rqstdma));
 445         bpl->addrLow = le32_to_cpu(putPaddrLow(pnvme_lsreq->rqstdma));
 446         bpl->tus.f.bdeFlags = 0;
 447         bpl->tus.f.bdeSize = pnvme_lsreq->rqstlen;
 448         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 449         bpl++;
 450
 451         bpl->addrHigh = le32_to_cpu(putPaddrHigh(pnvme_lsreq->rspdma));
 452         bpl->addrLow = le32_to_cpu(putPaddrLow(pnvme_lsreq->rspdma));
 453         bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
 454         bpl->tus.f.bdeSize = pnvme_lsreq->rsplen;
 455         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 456
 457         /* Expand print to include key fields. */
 458         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
 459                          "6051 ENTER.  lport %p, rport %p lsreq%p rqstlen:%d "
 460                          "rsplen:%d %pad %pad\n",
 461                          pnvme_lport, pnvme_rport,
 462                          pnvme_lsreq, pnvme_lsreq->rqstlen,
 463                          pnvme_lsreq->rsplen, &pnvme_lsreq->rqstdma,
 464                          &pnvme_lsreq->rspdma);
 465
 466         vport->phba->fc4NvmeLsRequests++;
 467
 468         /* Hardcode the wait to 30 seconds.  Connections are failing otherwise.
 469          * This code allows it all to work.
 470          */
 471         ret = lpfc_nvme_gen_req(vport, bmp, pnvme_lsreq->rqstaddr,
 472                                 pnvme_lsreq, lpfc_nvme_cmpl_gen_req,
 473                                 ndlp, 2, 30, 0);
 474         if (ret != WQE_SUCCESS) {
 475                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
 476                                  "6052 EXIT. issue ls wqe failed lport %p, "
 477                                  "rport %p lsreq%p Status %x DID %x\n",
 478                                  pnvme_lport, pnvme_rport, pnvme_lsreq,
 479                                  ret, ndlp->nlp_DID);
 480                 lpfc_mbuf_free(vport->phba, bmp->virt, bmp->phys);
 481                 kfree(bmp);
 482                 return ret;
 483         }
 484
 485         /* Stub in routine and return 0 for now. */
 486         return ret;
 487 }
 488
 489 /**
 490  * lpfc_nvme_ls_abort - Issue an Link Service request
 491  * @lpfc_pnvme: Pointer to the driver's nvme instance data
 492  * @lpfc_nvme_lport: Pointer to the driver's local port data
 493  * @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
 494  *
 495  * Driver registers this routine to handle any link service request
 496  * from the nvme_fc transport to a remote nvme-aware port.
 497  *
 498  * Return value :
 499  *   0 - Success
 500  *   TODO: What are the failure codes.
 501  **/
 502 static void
 503 lpfc_nvme_ls_abort(struct nvme_fc_local_port *pnvme_lport,
 504                    struct nvme_fc_remote_port *pnvme_rport,
 505                    struct nvmefc_ls_req *pnvme_lsreq)
 506 {
 507         struct lpfc_nvme_lport *lport;
 508         struct lpfc_vport *vport;
 509         struct lpfc_hba *phba;
 510         struct lpfc_nodelist *ndlp;
 511         LIST_HEAD(abort_list);
 512         struct lpfc_sli_ring *pring;
 513         struct lpfc_iocbq *wqe, *next_wqe;
 514
 515         lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
 516         vport = lport->vport;
 517         phba = vport->phba;
 518
 519         ndlp = lpfc_findnode_did(vport, pnvme_rport->port_id);
 520         if (!ndlp) {
 521                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
 522                                  "6049 Could not find node for DID %x\n",
 523                                  pnvme_rport->port_id);
 524                 return;
 525         }
 526
 527         /* Expand print to include key fields. */
 528         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS,
 529                          "6040 ENTER.  lport %p, rport %p lsreq %p rqstlen:%d "
 530                          "rsplen:%d %pad %pad\n",
 531                          pnvme_lport, pnvme_rport,
 532                          pnvme_lsreq, pnvme_lsreq->rqstlen,
 533                          pnvme_lsreq->rsplen, &pnvme_lsreq->rqstdma,
 534                          &pnvme_lsreq->rspdma);
 535
 536         /*
 537          * Lock the ELS ring txcmplq and build a local list of all ELS IOs
 538          * that need an ABTS.  The IOs need to stay on the txcmplq so that
 539          * the abort operation completes them successfully.
 540          */
 541         pring = phba->sli4_hba.nvmels_wq->pring;
 542         spin_lock_irq(&phba->hbalock);
 543         spin_lock(&pring->ring_lock);
 544         list_for_each_entry_safe(wqe, next_wqe, &pring->txcmplq, list) {
 545                 /* Add to abort_list on on NDLP match. */
 546                 if (lpfc_check_sli_ndlp(phba, pring, wqe, ndlp)) {
 547                         wqe->iocb_flag |= LPFC_DRIVER_ABORTED;
 548                         list_add_tail(&wqe->dlist, &abort_list);
 549                 }
 550         }
 551         spin_unlock(&pring->ring_lock);
 552         spin_unlock_irq(&phba->hbalock);
 553
 554         /* Abort the targeted IOs and remove them from the abort list. */
 555         list_for_each_entry_safe(wqe, next_wqe, &abort_list, dlist) {
 556                 spin_lock_irq(&phba->hbalock);
 557                 list_del_init(&wqe->dlist);
 558                 lpfc_sli_issue_abort_iotag(phba, pring, wqe);
 559                 spin_unlock_irq(&phba->hbalock);
 560         }
 561 }
 562
 563 /* Fix up the existing sgls for NVME IO. */
 564 static void
 565 lpfc_nvme_adj_fcp_sgls(struct lpfc_vport *vport,
 566                        struct lpfc_nvme_buf *lpfc_ncmd,
 567                        struct nvmefc_fcp_req *nCmd)
 568 {
 569         struct sli4_sge *sgl;
 570         union lpfc_wqe128 *wqe;
 571         uint32_t *wptr, *dptr;
 572
 573         /*
 574          * Adjust the FCP_CMD and FCP_RSP DMA data and sge_len to
 575          * match NVME.  NVME sends 96 bytes. Also, use the
 576          * nvme commands command and response dma addresses
 577          * rather than the virtual memory to ease the restore
 578          * operation.
 579          */
 580         sgl = lpfc_ncmd->nvme_sgl;
 581         sgl->sge_len = cpu_to_le32(nCmd->cmdlen);
 582
 583         sgl++;
 584
 585         /* Setup the physical region for the FCP RSP */
 586         sgl->addr_hi = cpu_to_le32(putPaddrHigh(nCmd->rspdma));
 587         sgl->addr_lo = cpu_to_le32(putPaddrLow(nCmd->rspdma));
 588         sgl->word2 = le32_to_cpu(sgl->word2);
 589         if (nCmd->sg_cnt)
 590                 bf_set(lpfc_sli4_sge_last, sgl, 0);
 591         else
 592                 bf_set(lpfc_sli4_sge_last, sgl, 1);
 593         sgl->word2 = cpu_to_le32(sgl->word2);
 594         sgl->sge_len = cpu_to_le32(nCmd->rsplen);
 595
 596         /*
 597          * Get a local pointer to the built-in wqe and correct
 598          * the cmd size to match NVME's 96 bytes and fix
 599          * the dma address.
 600          */
 601
 602         /* 128 byte wqe support here */
 603         wqe = (union lpfc_wqe128 *)&lpfc_ncmd->cur_iocbq.wqe;
 604
 605         /* Word 0-2 - NVME CMND IU (embedded payload) */
 606         wqe->generic.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_IMMED;
 607         wqe->generic.bde.tus.f.bdeSize = 60;
 608         wqe->generic.bde.addrHigh = 0;
 609         wqe->generic.bde.addrLow =  64;  /* Word 16 */
 610
 611         /* Word 3 */
 612         bf_set(payload_offset_len, &wqe->fcp_icmd,
 613                (nCmd->rsplen + nCmd->cmdlen));
 614
 615         /* Word 10 */
 616         bf_set(wqe_nvme, &wqe->fcp_icmd.wqe_com, 1);
 617         bf_set(wqe_wqes, &wqe->fcp_icmd.wqe_com, 1);
 618
 619         /*
 620          * Embed the payload in the last half of the WQE
 621          * WQE words 16-30 get the NVME CMD IU payload
 622          *
 623          * WQE words 16-19 get payload Words 1-4
 624          * WQE words 20-21 get payload Words 6-7
 625          * WQE words 22-29 get payload Words 16-23
 626          */
 627         wptr = &wqe->words[16];  /* WQE ptr */
 628         dptr = (uint32_t *)nCmd->cmdaddr;  /* payload ptr */
 629         dptr++;                 /* Skip Word 0 in payload */
 630
 631         *wptr++ = *dptr++;      /* Word 1 */
 632         *wptr++ = *dptr++;      /* Word 2 */
 633         *wptr++ = *dptr++;      /* Word 3 */
 634         *wptr++ = *dptr++;      /* Word 4 */
 635         dptr++;                 /* Skip Word 5 in payload */
 636         *wptr++ = *dptr++;      /* Word 6 */
 637         *wptr++ = *dptr++;      /* Word 7 */
 638         dptr += 8;              /* Skip Words 8-15 in payload */
 639         *wptr++ = *dptr++;      /* Word 16 */
 640         *wptr++ = *dptr++;      /* Word 17 */
 641         *wptr++ = *dptr++;      /* Word 18 */
 642         *wptr++ = *dptr++;      /* Word 19 */
 643         *wptr++ = *dptr++;      /* Word 20 */
 644         *wptr++ = *dptr++;      /* Word 21 */
 645         *wptr++ = *dptr++;      /* Word 22 */
 646         *wptr   = *dptr;        /* Word 23 */
 647 }
 648
 649 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 650 static void
 651 lpfc_nvme_ktime(struct lpfc_hba *phba,
 652                 struct lpfc_nvme_buf *lpfc_ncmd)
 653 {
 654         uint64_t seg1, seg2, seg3, seg4;
 655
 656         if (!phba->ktime_on)
 657                 return;
 658         if (!lpfc_ncmd->ts_last_cmd ||
 659             !lpfc_ncmd->ts_cmd_start ||
 660             !lpfc_ncmd->ts_cmd_wqput ||
 661             !lpfc_ncmd->ts_isr_cmpl ||
 662             !lpfc_ncmd->ts_data_nvme)
 663                 return;
 664         if (lpfc_ncmd->ts_cmd_start < lpfc_ncmd->ts_last_cmd)
 665                 return;
 666         if (lpfc_ncmd->ts_cmd_wqput < lpfc_ncmd->ts_cmd_start)
 667                 return;
 668         if (lpfc_ncmd->ts_isr_cmpl < lpfc_ncmd->ts_cmd_wqput)
 669                 return;
 670         if (lpfc_ncmd->ts_data_nvme < lpfc_ncmd->ts_isr_cmpl)
 671                 return;
 672         /*
 673          * Segment 1 - Time from Last FCP command cmpl is handed
 674          * off to NVME Layer to start of next command.
 675          * Segment 2 - Time from Driver receives a IO cmd start
 676          * from NVME Layer to WQ put is done on IO cmd.
 677          * Segment 3 - Time from Driver WQ put is done on IO cmd
 678          * to MSI-X ISR for IO cmpl.
 679          * Segment 4 - Time from MSI-X ISR for IO cmpl to when
 680          * cmpl is handled off to the NVME Layer.
 681          */
 682         seg1 = lpfc_ncmd->ts_cmd_start - lpfc_ncmd->ts_last_cmd;
 683         if (seg1 > 5000000)  /* 5 ms - for sequential IOs */
 684                 return;
 685
 686         /* Calculate times relative to start of IO */
 687         seg2 = (lpfc_ncmd->ts_cmd_wqput - lpfc_ncmd->ts_cmd_start);
 688         seg3 = (lpfc_ncmd->ts_isr_cmpl -
 689                 lpfc_ncmd->ts_cmd_start) - seg2;
 690         seg4 = (lpfc_ncmd->ts_data_nvme -
 691                 lpfc_ncmd->ts_cmd_start) - seg2 - seg3;
 692         phba->ktime_data_samples++;
 693         phba->ktime_seg1_total += seg1;
 694         if (seg1 < phba->ktime_seg1_min)
 695                 phba->ktime_seg1_min = seg1;
 696         else if (seg1 > phba->ktime_seg1_max)
 697                 phba->ktime_seg1_max = seg1;
 698         phba->ktime_seg2_total += seg2;
 699         if (seg2 < phba->ktime_seg2_min)
 700                 phba->ktime_seg2_min = seg2;
 701         else if (seg2 > phba->ktime_seg2_max)
 702                 phba->ktime_seg2_max = seg2;
 703         phba->ktime_seg3_total += seg3;
 704         if (seg3 < phba->ktime_seg3_min)
 705                 phba->ktime_seg3_min = seg3;
 706         else if (seg3 > phba->ktime_seg3_max)
 707                 phba->ktime_seg3_max = seg3;
 708         phba->ktime_seg4_total += seg4;
 709         if (seg4 < phba->ktime_seg4_min)
 710                 phba->ktime_seg4_min = seg4;
 711         else if (seg4 > phba->ktime_seg4_max)
 712                 phba->ktime_seg4_max = seg4;
 713
 714         lpfc_ncmd->ts_last_cmd = 0;
 715         lpfc_ncmd->ts_cmd_start = 0;
 716         lpfc_ncmd->ts_cmd_wqput  = 0;
 717         lpfc_ncmd->ts_isr_cmpl = 0;
 718         lpfc_ncmd->ts_data_nvme = 0;
 719 }
 720 #endif
 721
 722 /**
 723  * lpfc_nvme_io_cmd_wqe_cmpl - Complete an NVME-over-FCP IO
 724  * @lpfc_pnvme: Pointer to the driver's nvme instance data
 725  * @lpfc_nvme_lport: Pointer to the driver's local port data
 726  * @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
 727  *
 728  * Driver registers this routine as it io request handler.  This
 729  * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
 730  * data structure to the rport indicated in @lpfc_nvme_rport.
 731  *
 732  * Return value :
 733  *   0 - Success
 734  *   TODO: What are the failure codes.
 735  **/
 736 static void
 737 lpfc_nvme_io_cmd_wqe_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pwqeIn,
 738                           struct lpfc_wcqe_complete *wcqe)
 739 {
 740         struct lpfc_nvme_buf *lpfc_ncmd =
 741                 (struct lpfc_nvme_buf *)pwqeIn->context1;
 742         struct lpfc_vport *vport = pwqeIn->vport;
 743         struct nvmefc_fcp_req *nCmd;
 744         struct nvme_fc_ersp_iu *ep;
 745         struct nvme_fc_cmd_iu *cp;
 746         struct lpfc_nvme_rport *rport;
 747         struct lpfc_nodelist *ndlp;
 748         unsigned long flags;
 749         uint32_t code;
 750         uint16_t cid, sqhd, data;
 751         uint32_t *ptr;
 752
 753         /* Sanity check on return of outstanding command */
 754         if (!lpfc_ncmd || !lpfc_ncmd->nvmeCmd || !lpfc_ncmd->nrport) {
 755                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE | LOG_NVME_IOERR,
 756                                  "6071 Completion pointers bad on wqe %p.\n",
 757                                  wcqe);
 758                 return;
 759         }
 760         phba->fc4NvmeIoCmpls++;
 761
 762         nCmd = lpfc_ncmd->nvmeCmd;
 763         rport = lpfc_ncmd->nrport;
 764
 765         lpfc_nvmeio_data(phba, "NVME FCP CMPL: xri x%x stat x%x parm x%x\n",
 766                          lpfc_ncmd->cur_iocbq.sli4_xritag,
 767                          bf_get(lpfc_wcqe_c_status, wcqe), wcqe->parameter);
 768         /*
 769          * Catch race where our node has transitioned, but the
 770          * transport is still transitioning.
 771          */
 772         ndlp = rport->ndlp;
 773         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
 774                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE | LOG_NVME_IOERR,
 775                                  "6061 rport %p, ndlp %p, DID x%06x ndlp "
 776                                  "not ready.\n",
 777                                  rport, ndlp, rport->remoteport->port_id);
 778
 779                 ndlp = lpfc_findnode_did(vport, rport->remoteport->port_id);
 780                 if (!ndlp) {
 781                         lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_IOERR,
 782                                          "6062 Ignoring NVME cmpl.  No ndlp\n");
 783                         goto out_err;
 784                 }
 785         }
 786
 787         code = bf_get(lpfc_wcqe_c_code, wcqe);
 788         if (code == CQE_CODE_NVME_ERSP) {
 789                 /* For this type of CQE, we need to rebuild the rsp */
 790                 ep = (struct nvme_fc_ersp_iu *)nCmd->rspaddr;
 791
 792                 /*
 793                  * Get Command Id from cmd to plug into response. This
 794                  * code is not needed in the next NVME Transport drop.
 795                  */
 796                 cp = (struct nvme_fc_cmd_iu *)nCmd->cmdaddr;
 797                 cid = cp->sqe.common.command_id;
 798
 799                 /*
 800                  * RSN is in CQE word 2
 801                  * SQHD is in CQE Word 3 bits 15:0
 802                  * Cmd Specific info is in CQE Word 1
 803                  * and in CQE Word 0 bits 15:0
 804                  */
 805                 sqhd = bf_get(lpfc_wcqe_c_sqhead, wcqe);
 806
 807                 /* Now lets build the NVME ERSP IU */
 808                 ep->iu_len = cpu_to_be16(8);
 809                 ep->rsn = wcqe->parameter;
 810                 ep->xfrd_len = cpu_to_be32(nCmd->payload_length);
 811                 ep->rsvd12 = 0;
 812                 ptr = (uint32_t *)&ep->cqe.result.u64;
 813                 *ptr++ = wcqe->total_data_placed;
 814                 data = bf_get(lpfc_wcqe_c_ersp0, wcqe);
 815                 *ptr = (uint32_t)data;
 816                 ep->cqe.sq_head = sqhd;
 817                 ep->cqe.sq_id =  nCmd->sqid;
 818                 ep->cqe.command_id = cid;
 819                 ep->cqe.status = 0;
 820
 821                 lpfc_ncmd->status = IOSTAT_SUCCESS;
 822                 lpfc_ncmd->result = 0;
 823                 nCmd->rcv_rsplen = LPFC_NVME_ERSP_LEN;
 824                 nCmd->transferred_length = nCmd->payload_length;
 825         } else {
 826                 lpfc_ncmd->status = (bf_get(lpfc_wcqe_c_status, wcqe) &
 827                             LPFC_IOCB_STATUS_MASK);
 828                 lpfc_ncmd->result = wcqe->parameter;
 829
 830                 /* For NVME, the only failure path that results in an
 831                  * IO error is when the adapter rejects it.  All other
 832                  * conditions are a success case and resolved by the
 833                  * transport.
 834                  * IOSTAT_FCP_RSP_ERROR means:
 835                  * 1. Length of data received doesn't match total
 836                  *    transfer length in WQE
 837                  * 2. If the RSP payload does NOT match these cases:
 838                  *    a. RSP length 12/24 bytes and all zeros
 839                  *    b. NVME ERSP
 840                  */
 841                 switch (lpfc_ncmd->status) {
 842                 case IOSTAT_SUCCESS:
 843                         nCmd->transferred_length = wcqe->total_data_placed;
 844                         nCmd->rcv_rsplen = 0;
 845                         nCmd->status = 0;
 846                         break;
 847                 case IOSTAT_FCP_RSP_ERROR:
 848                         nCmd->transferred_length = wcqe->total_data_placed;
 849                         nCmd->rcv_rsplen = wcqe->parameter;
 850                         nCmd->status = 0;
 851                         /* Sanity check */
 852                         if (nCmd->rcv_rsplen == LPFC_NVME_ERSP_LEN)
 853                                 break;
 854                         lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_IOERR,
 855                                          "6081 NVME Completion Protocol Error: "
 856                                          "status x%x result x%x placed x%x\n",
 857                                          lpfc_ncmd->status, lpfc_ncmd->result,
 858                                          wcqe->total_data_placed);
 859                         break;
 860                 default:
 861 out_err:
 862                         lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_IOERR,
 863                                          "6072 NVME Completion Error: "
 864                                          "status x%x result x%x placed x%x\n",
 865                                          lpfc_ncmd->status, lpfc_ncmd->result,
 866                                          wcqe->total_data_placed);
 867                         nCmd->transferred_length = 0;
 868                         nCmd->rcv_rsplen = 0;
 869                         nCmd->status = NVME_SC_FC_TRANSPORT_ERROR;
 870                 }
 871         }
 872
 873         /* pick up SLI4 exhange busy condition */
 874         if (bf_get(lpfc_wcqe_c_xb, wcqe))
 875                 lpfc_ncmd->flags |= LPFC_SBUF_XBUSY;
 876         else
 877                 lpfc_ncmd->flags &= ~LPFC_SBUF_XBUSY;
 878
 879         if (ndlp && NLP_CHK_NODE_ACT(ndlp))
 880                 atomic_dec(&ndlp->cmd_pending);
 881
 882         /* Update stats and complete the IO.  There is
 883          * no need for dma unprep because the nvme_transport
 884          * owns the dma address.
 885          */
 886 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 887         if (phba->ktime_on) {
 888                 lpfc_ncmd->ts_isr_cmpl = pwqeIn->isr_timestamp;
 889                 lpfc_ncmd->ts_data_nvme = ktime_get_ns();
 890                 phba->ktime_last_cmd = lpfc_ncmd->ts_data_nvme;
 891                 lpfc_nvme_ktime(phba, lpfc_ncmd);
 892         }
 893         if (phba->cpucheck_on & LPFC_CHECK_NVME_IO) {
 894                 if (lpfc_ncmd->cpu != smp_processor_id())
 895                         lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_IOERR,
 896                                          "6701 CPU Check cmpl: "
 897                                          "cpu %d expect %d\n",
 898                                          smp_processor_id(), lpfc_ncmd->cpu);
 899                 if (lpfc_ncmd->cpu < LPFC_CHECK_CPU_CNT)
 900                         phba->cpucheck_cmpl_io[lpfc_ncmd->cpu]++;
 901         }
 902 #endif
 903         nCmd->done(nCmd);
 904
 905         spin_lock_irqsave(&phba->hbalock, flags);
 906         lpfc_ncmd->nrport = NULL;
 907         spin_unlock_irqrestore(&phba->hbalock, flags);
 908
 909         lpfc_release_nvme_buf(phba, lpfc_ncmd);
 910 }
 911
 912
 913 /**
 914  * lpfc_nvme_prep_io_cmd - Issue an NVME-over-FCP IO
 915  * @lpfc_pnvme: Pointer to the driver's nvme instance data
 916  * @lpfc_nvme_lport: Pointer to the driver's local port data
 917  * @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
 918  * @lpfc_nvme_fcreq: IO request from nvme fc to driver.
 919  * @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue
 920  *
 921  * Driver registers this routine as it io request handler.  This
 922  * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
 923  * data structure to the rport indicated in @lpfc_nvme_rport.
 924  *
 925  * Return value :
 926  *   0 - Success
 927  *   TODO: What are the failure codes.
 928  **/
 929 static int
 930 lpfc_nvme_prep_io_cmd(struct lpfc_vport *vport,
 931                       struct lpfc_nvme_buf *lpfc_ncmd,
 932                       struct lpfc_nodelist *pnode)
 933 {
 934         struct lpfc_hba *phba = vport->phba;
 935         struct nvmefc_fcp_req *nCmd = lpfc_ncmd->nvmeCmd;
 936         struct lpfc_iocbq *pwqeq = &(lpfc_ncmd->cur_iocbq);
 937         union lpfc_wqe128 *wqe = (union lpfc_wqe128 *)&pwqeq->wqe;
 938         uint32_t req_len;
 939
 940         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
 941                 return -EINVAL;
 942
 943         /*
 944          * There are three possibilities here - use scatter-gather segment, use
 945          * the single mapping, or neither.
 946          */
 947         wqe->fcp_iwrite.initial_xfer_len = 0;
 948         if (nCmd->sg_cnt) {
 949                 if (nCmd->io_dir == NVMEFC_FCP_WRITE) {
 950                         /* Word 5 */
 951                         if ((phba->cfg_nvme_enable_fb) &&
 952                             (pnode->nlp_flag & NLP_FIRSTBURST)) {
 953                                 req_len = lpfc_ncmd->nvmeCmd->payload_length;
 954                                 if (req_len < pnode->nvme_fb_size)
 955                                         wqe->fcp_iwrite.initial_xfer_len =
 956                                                 req_len;
 957                                 else
 958                                         wqe->fcp_iwrite.initial_xfer_len =
 959                                                 pnode->nvme_fb_size;
 960                         }
 961
 962                         /* Word 7 */
 963                         bf_set(wqe_cmnd, &wqe->generic.wqe_com,
 964                                CMD_FCP_IWRITE64_WQE);
 965                         bf_set(wqe_pu, &wqe->generic.wqe_com,
 966                                PARM_READ_CHECK);
 967
 968                         /* Word 10 */
 969                         bf_set(wqe_qosd, &wqe->fcp_iwrite.wqe_com, 0);
 970                         bf_set(wqe_iod, &wqe->fcp_iwrite.wqe_com,
 971                                LPFC_WQE_IOD_WRITE);
 972                         bf_set(wqe_lenloc, &wqe->fcp_iwrite.wqe_com,
 973                                LPFC_WQE_LENLOC_WORD4);
 974                         if (phba->cfg_nvme_oas)
 975                                 bf_set(wqe_oas, &wqe->fcp_iwrite.wqe_com, 1);
 976
 977                         /* Word 11 */
 978                         bf_set(wqe_cmd_type, &wqe->generic.wqe_com,
 979                                NVME_WRITE_CMD);
 980
 981                         phba->fc4NvmeOutputRequests++;
 982                 } else {
 983                         /* Word 7 */
 984                         bf_set(wqe_cmnd, &wqe->generic.wqe_com,
 985                                CMD_FCP_IREAD64_WQE);
 986                         bf_set(wqe_pu, &wqe->generic.wqe_com,
 987                                PARM_READ_CHECK);
 988
 989                         /* Word 10 */
 990                         bf_set(wqe_qosd, &wqe->fcp_iread.wqe_com, 0);
 991                         bf_set(wqe_iod, &wqe->fcp_iread.wqe_com,
 992                                LPFC_WQE_IOD_READ);
 993                         bf_set(wqe_lenloc, &wqe->fcp_iread.wqe_com,
 994                                LPFC_WQE_LENLOC_WORD4);
 995                         if (phba->cfg_nvme_oas)
 996                                 bf_set(wqe_oas, &wqe->fcp_iread.wqe_com, 1);
 997
 998                         /* Word 11 */
 999                         bf_set(wqe_cmd_type, &wqe->generic.wqe_com,
1000                                NVME_READ_CMD);
1001
1002                         phba->fc4NvmeInputRequests++;
1003                 }
1004         } else {
1005                 /* Word 4 */
1006                 wqe->fcp_icmd.rsrvd4 = 0;
1007
1008                 /* Word 7 */
1009                 bf_set(wqe_cmnd, &wqe->generic.wqe_com, CMD_FCP_ICMND64_WQE);
1010                 bf_set(wqe_pu, &wqe->generic.wqe_com, 0);
1011
1012                 /* Word 10 */
1013                 bf_set(wqe_qosd, &wqe->fcp_icmd.wqe_com, 1);
1014                 bf_set(wqe_iod, &wqe->fcp_icmd.wqe_com, LPFC_WQE_IOD_WRITE);
1015                 bf_set(wqe_lenloc, &wqe->fcp_icmd.wqe_com,
1016                        LPFC_WQE_LENLOC_NONE);
1017                 if (phba->cfg_nvme_oas)
1018                         bf_set(wqe_oas, &wqe->fcp_icmd.wqe_com, 1);
1019
1020                 /* Word 11 */
1021                 bf_set(wqe_cmd_type, &wqe->generic.wqe_com, NVME_READ_CMD);
1022
1023                 phba->fc4NvmeControlRequests++;
1024         }
1025         /*
1026          * Finish initializing those WQE fields that are independent
1027          * of the nvme_cmnd request_buffer
1028          */
1029
1030         /* Word 6 */
1031         bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
1032                phba->sli4_hba.rpi_ids[pnode->nlp_rpi]);
1033         bf_set(wqe_xri_tag, &wqe->generic.wqe_com, pwqeq->sli4_xritag);
1034
1035         /* Word 7 */
1036         /* Preserve Class data in the ndlp. */
1037         bf_set(wqe_class, &wqe->generic.wqe_com,
1038                (pnode->nlp_fcp_info & 0x0f));
1039
1040         /* Word 8 */
1041         wqe->generic.wqe_com.abort_tag = pwqeq->iotag;
1042
1043         /* Word 9 */
1044         bf_set(wqe_reqtag, &wqe->generic.wqe_com, pwqeq->iotag);
1045
1046         /* Word 11 */
1047         bf_set(wqe_cqid, &wqe->generic.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
1048
1049         pwqeq->vport = vport;
1050         return 0;
1051 }
1052
1053
1054 /**
1055  * lpfc_nvme_prep_io_dma - Issue an NVME-over-FCP IO
1056  * @lpfc_pnvme: Pointer to the driver's nvme instance data
1057  * @lpfc_nvme_lport: Pointer to the driver's local port data
1058  * @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
1059  * @lpfc_nvme_fcreq: IO request from nvme fc to driver.
1060  * @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue
1061  *
1062  * Driver registers this routine as it io request handler.  This
1063  * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
1064  * data structure to the rport indicated in @lpfc_nvme_rport.
1065  *
1066  * Return value :
1067  *   0 - Success
1068  *   TODO: What are the failure codes.
1069  **/
1070 static int
1071 lpfc_nvme_prep_io_dma(struct lpfc_vport *vport,
1072                       struct lpfc_nvme_buf *lpfc_ncmd)
1073 {
1074         struct lpfc_hba *phba = vport->phba;
1075         struct nvmefc_fcp_req *nCmd = lpfc_ncmd->nvmeCmd;
1076         union lpfc_wqe128 *wqe = (union lpfc_wqe128 *)&lpfc_ncmd->cur_iocbq.wqe;
1077         struct sli4_sge *sgl = lpfc_ncmd->nvme_sgl;
1078         struct scatterlist *data_sg;
1079         struct sli4_sge *first_data_sgl;
1080         dma_addr_t physaddr;
1081         uint32_t num_bde = 0;
1082         uint32_t dma_len;
1083         uint32_t dma_offset = 0;
1084         int nseg, i;
1085
1086         /* Fix up the command and response DMA stuff. */
1087         lpfc_nvme_adj_fcp_sgls(vport, lpfc_ncmd, nCmd);
1088
1089         /*
1090          * There are three possibilities here - use scatter-gather segment, use
1091          * the single mapping, or neither.
1092          */
1093         if (nCmd->sg_cnt) {
1094                 /*
1095                  * Jump over the cmd and rsp SGEs.  The fix routine
1096                  * has already adjusted for this.
1097                  */
1098                 sgl += 2;
1099
1100                 first_data_sgl = sgl;
1101                 lpfc_ncmd->seg_cnt = nCmd->sg_cnt;
1102                 if (lpfc_ncmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1103                         lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
1104                                         "6058 Too many sg segments from "
1105                                         "NVME Transport.  Max %d, "
1106                                         "nvmeIO sg_cnt %d\n",
1107                                         phba->cfg_sg_seg_cnt,
1108                                         lpfc_ncmd->seg_cnt);
1109                         lpfc_ncmd->seg_cnt = 0;
1110                         return 1;
1111                 }
1112
1113                 /*
1114                  * The driver established a maximum scatter-gather segment count
1115                  * during probe that limits the number of sg elements in any
1116                  * single nvme command.  Just run through the seg_cnt and format
1117                  * the sge's.
1118                  */
1119                 nseg = nCmd->sg_cnt;
1120                 data_sg = nCmd->first_sgl;
1121                 for (i = 0; i < nseg; i++) {
1122                         if (data_sg == NULL) {
1123                                 lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
1124                                                 "6059 dptr err %d, nseg %d\n",
1125                                                 i, nseg);
1126                                 lpfc_ncmd->seg_cnt = 0;
1127                                 return 1;
1128                         }
1129                         physaddr = data_sg->dma_address;
1130                         dma_len = data_sg->length;
1131                         sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
1132                         sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
1133                         sgl->word2 = le32_to_cpu(sgl->word2);
1134                         if ((num_bde + 1) == nseg)
1135                                 bf_set(lpfc_sli4_sge_last, sgl, 1);
1136                         else
1137                                 bf_set(lpfc_sli4_sge_last, sgl, 0);
1138                         bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
1139                         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
1140                         sgl->word2 = cpu_to_le32(sgl->word2);
1141                         sgl->sge_len = cpu_to_le32(dma_len);
1142
1143                         dma_offset += dma_len;
1144                         data_sg = sg_next(data_sg);
1145                         sgl++;
1146                 }
1147         } else {
1148                 /* For this clause to be valid, the payload_length
1149                  * and sg_cnt must zero.
1150                  */
1151                 if (nCmd->payload_length != 0) {
1152                         lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
1153                                         "6063 NVME DMA Prep Err: sg_cnt %d "
1154                                         "payload_length x%x\n",
1155                                         nCmd->sg_cnt, nCmd->payload_length);
1156                         return 1;
1157                 }
1158         }
1159
1160         /*
1161          * Due to difference in data length between DIF/non-DIF paths,
1162          * we need to set word 4 of WQE here
1163          */
1164         wqe->fcp_iread.total_xfer_len = nCmd->payload_length;
1165         return 0;
1166 }
1167
1168 /**
1169  * lpfc_nvme_fcp_io_submit - Issue an NVME-over-FCP IO
1170  * @lpfc_pnvme: Pointer to the driver's nvme instance data
1171  * @lpfc_nvme_lport: Pointer to the driver's local port data
1172  * @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
1173  * @lpfc_nvme_fcreq: IO request from nvme fc to driver.
1174  * @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue
1175  *
1176  * Driver registers this routine as it io request handler.  This
1177  * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
1178  * data structure to the rport
1179  indicated in @lpfc_nvme_rport.
1180  *
1181  * Return value :
1182  *   0 - Success
1183  *   TODO: What are the failure codes.
1184  **/
1185 static int
1186 lpfc_nvme_fcp_io_submit(struct nvme_fc_local_port *pnvme_lport,
1187                         struct nvme_fc_remote_port *pnvme_rport,
1188                         void *hw_queue_handle,
1189                         struct nvmefc_fcp_req *pnvme_fcreq)
1190 {
1191         int ret = 0;
1192         struct lpfc_nvme_lport *lport;
1193         struct lpfc_vport *vport;
1194         struct lpfc_hba *phba;
1195         struct lpfc_nodelist *ndlp;
1196         struct lpfc_nvme_buf *lpfc_ncmd;
1197         struct lpfc_nvme_rport *rport;
1198         struct lpfc_nvme_qhandle *lpfc_queue_info;
1199 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1200         uint64_t start = 0;
1201 #endif
1202
1203         lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
1204         vport = lport->vport;
1205         phba = vport->phba;
1206
1207 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1208         if (phba->ktime_on)
1209                 start = ktime_get_ns();
1210 #endif
1211         rport = (struct lpfc_nvme_rport *)pnvme_rport->private;
1212         lpfc_queue_info = (struct lpfc_nvme_qhandle *)hw_queue_handle;
1213
1214         /*
1215          * Catch race where our node has transitioned, but the
1216          * transport is still transitioning.
1217          */
1218         ndlp = rport->ndlp;
1219         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
1220                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE | LOG_NVME_IOERR,
1221                                  "6053 rport %p, ndlp %p, DID x%06x "
1222                                  "ndlp not ready.\n",
1223                                  rport, ndlp, pnvme_rport->port_id);
1224
1225                 ndlp = lpfc_findnode_did(vport, pnvme_rport->port_id);
1226                 if (!ndlp) {
1227                         lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_IOERR,
1228                                          "6066 Missing node for DID %x\n",
1229                                          pnvme_rport->port_id);
1230                         ret = -ENODEV;
1231                         goto out_fail;
1232                 }
1233         }
1234
1235         /* The remote node has to be a mapped target or it's an error. */
1236         if ((ndlp->nlp_type & NLP_NVME_TARGET) &&
1237             (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
1238                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE | LOG_NVME_IOERR,
1239                                  "6036 rport %p, DID x%06x not ready for "
1240                                  "IO. State x%x, Type x%x\n",
1241                                  rport, pnvme_rport->port_id,
1242                                  ndlp->nlp_state, ndlp->nlp_type);
1243                 ret = -ENODEV;
1244                 goto out_fail;
1245
1246         }
1247
1248         /* The node is shared with FCP IO, make sure the IO pending count does
1249          * not exceed the programmed depth.
1250          */
1251         if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth) {
1252                 ret = -EAGAIN;
1253                 goto out_fail;
1254         }
1255
1256         lpfc_ncmd = lpfc_get_nvme_buf(phba, ndlp);
1257         if (lpfc_ncmd == NULL) {
1258                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1259                                  "6065 driver's buffer pool is empty, "
1260                                  "IO failed\n");
1261                 ret = -ENOMEM;
1262                 goto out_fail;
1263         }
1264 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1265         if (phba->ktime_on) {
1266                 lpfc_ncmd->ts_cmd_start = start;
1267                 lpfc_ncmd->ts_last_cmd = phba->ktime_last_cmd;
1268         }
1269 #endif
1270
1271         /*
1272          * Store the data needed by the driver to issue, abort, and complete
1273          * an IO.
1274          * Do not let the IO hang out forever.  There is no midlayer issuing
1275          * an abort so inform the FW of the maximum IO pending time.
1276          */
1277         pnvme_fcreq->private = (void *)lpfc_ncmd;
1278         lpfc_ncmd->nvmeCmd = pnvme_fcreq;
1279         lpfc_ncmd->nrport = rport;
1280         lpfc_ncmd->ndlp = ndlp;
1281         lpfc_ncmd->start_time = jiffies;
1282
1283         lpfc_nvme_prep_io_cmd(vport, lpfc_ncmd, ndlp);
1284         ret = lpfc_nvme_prep_io_dma(vport, lpfc_ncmd);
1285         if (ret) {
1286                 ret = -ENOMEM;
1287                 goto out_free_nvme_buf;
1288         }
1289
1290         atomic_inc(&ndlp->cmd_pending);
1291
1292         /*
1293          * Issue the IO on the WQ indicated by index in the hw_queue_handle.
1294          * This identfier was create in our hardware queue create callback
1295          * routine. The driver now is dependent on the IO queue steering from
1296          * the transport.  We are trusting the upper NVME layers know which
1297          * index to use and that they have affinitized a CPU to this hardware
1298          * queue. A hardware queue maps to a driver MSI-X vector/EQ/CQ/WQ.
1299          */
1300         lpfc_ncmd->cur_iocbq.hba_wqidx = lpfc_queue_info->index;
1301
1302         lpfc_nvmeio_data(phba, "NVME FCP XMIT: xri x%x idx %d to %06x\n",
1303                          lpfc_ncmd->cur_iocbq.sli4_xritag,
1304                          lpfc_queue_info->index, ndlp->nlp_DID);
1305
1306         ret = lpfc_sli4_issue_wqe(phba, LPFC_FCP_RING, &lpfc_ncmd->cur_iocbq);
1307         if (ret) {
1308                 atomic_dec(&ndlp->cmd_pending);
1309                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_IOERR,
1310                                  "6113 FCP could not issue WQE err %x "
1311                                  "sid: x%x did: x%x oxid: x%x\n",
1312                                  ret, vport->fc_myDID, ndlp->nlp_DID,
1313                                  lpfc_ncmd->cur_iocbq.sli4_xritag);
1314                 ret = -EBUSY;
1315                 goto out_free_nvme_buf;
1316         }
1317
1318 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1319         if (phba->ktime_on)
1320                 lpfc_ncmd->ts_cmd_wqput = ktime_get_ns();
1321
1322         if (phba->cpucheck_on & LPFC_CHECK_NVME_IO) {
1323                 lpfc_ncmd->cpu = smp_processor_id();
1324                 if (lpfc_ncmd->cpu != lpfc_queue_info->index) {
1325                         /* Check for admin queue */
1326                         if (lpfc_queue_info->qidx) {
1327                                 lpfc_printf_vlog(vport,
1328                                                  KERN_ERR, LOG_NVME_IOERR,
1329                                                 "6702 CPU Check cmd: "
1330                                                 "cpu %d wq %d\n",
1331                                                 lpfc_ncmd->cpu,
1332                                                 lpfc_queue_info->index);
1333                         }
1334                         lpfc_ncmd->cpu = lpfc_queue_info->index;
1335                 }
1336                 if (lpfc_ncmd->cpu < LPFC_CHECK_CPU_CNT)
1337                         phba->cpucheck_xmt_io[lpfc_ncmd->cpu]++;
1338         }
1339 #endif
1340         return 0;
1341
1342  out_free_nvme_buf:
1343         lpfc_release_nvme_buf(phba, lpfc_ncmd);
1344  out_fail:
1345         return ret;
1346 }
1347
1348 /**
1349  * lpfc_nvme_abort_fcreq_cmpl - Complete an NVME FCP abort request.
1350  * @phba: Pointer to HBA context object
1351  * @cmdiocb: Pointer to command iocb object.
1352  * @rspiocb: Pointer to response iocb object.
1353  *
1354  * This is the callback function for any NVME FCP IO that was aborted.
1355  *
1356  * Return value:
1357  *   None
1358  **/
1359 void
1360 lpfc_nvme_abort_fcreq_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
1361                            struct lpfc_wcqe_complete *abts_cmpl)
1362 {
1363         lpfc_printf_log(phba, KERN_ERR, LOG_NVME,
1364                         "6145 ABORT_XRI_CN completing on rpi x%x "
1365                         "original iotag x%x, abort cmd iotag x%x "
1366                         "req_tag x%x, status x%x, hwstatus x%x\n",
1367                         cmdiocb->iocb.un.acxri.abortContextTag,
1368                         cmdiocb->iocb.un.acxri.abortIoTag,
1369                         cmdiocb->iotag,
1370                         bf_get(lpfc_wcqe_c_request_tag, abts_cmpl),
1371                         bf_get(lpfc_wcqe_c_status, abts_cmpl),
1372                         bf_get(lpfc_wcqe_c_hw_status, abts_cmpl));
1373         lpfc_sli_release_iocbq(phba, cmdiocb);
1374 }
1375
1376 /**
1377  * lpfc_nvme_fcp_abort - Issue an NVME-over-FCP ABTS
1378  * @lpfc_pnvme: Pointer to the driver's nvme instance data
1379  * @lpfc_nvme_lport: Pointer to the driver's local port data
1380  * @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
1381  * @lpfc_nvme_fcreq: IO request from nvme fc to driver.
1382  * @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue
1383  *
1384  * Driver registers this routine as its nvme request io abort handler.  This
1385  * routine issues an fcp Abort WQE with data from the @lpfc_nvme_fcpreq
1386  * data structure to the rport indicated in @lpfc_nvme_rport.  This routine
1387  * is executed asynchronously - one the target is validated as "MAPPED" and
1388  * ready for IO, the driver issues the abort request and returns.
1389  *
1390  * Return value:
1391  *   None
1392  **/
1393 static void
1394 lpfc_nvme_fcp_abort(struct nvme_fc_local_port *pnvme_lport,
1395                     struct nvme_fc_remote_port *pnvme_rport,
1396                     void *hw_queue_handle,
1397                     struct nvmefc_fcp_req *pnvme_fcreq)
1398 {
1399         struct lpfc_nvme_lport *lport;
1400         struct lpfc_vport *vport;
1401         struct lpfc_hba *phba;
1402         struct lpfc_nodelist *ndlp;
1403         struct lpfc_nvme_rport *rport;
1404         struct lpfc_nvme_buf *lpfc_nbuf;
1405         struct lpfc_iocbq *abts_buf;
1406         struct lpfc_iocbq *nvmereq_wqe;
1407         union lpfc_wqe *abts_wqe;
1408         unsigned long flags;
1409         int ret_val;
1410
1411         lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
1412         rport = (struct lpfc_nvme_rport *)pnvme_rport->private;
1413         vport = lport->vport;
1414         phba = vport->phba;
1415
1416         /* Announce entry to new IO submit field. */
1417         lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
1418                          "6002 Abort Request to rport DID x%06x "
1419                          "for nvme_fc_req %p\n",
1420                          pnvme_rport->port_id,
1421                          pnvme_fcreq);
1422
1423         /*
1424          * Catch race where our node has transitioned, but the
1425          * transport is still transitioning.
1426          */
1427         ndlp = rport->ndlp;
1428         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
1429                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE | LOG_NVME_ABTS,
1430                                  "6054 rport %p, ndlp %p, DID x%06x ndlp "
1431                                  " not ready.\n",
1432                                  rport, ndlp, pnvme_rport->port_id);
1433
1434                 ndlp = lpfc_findnode_did(vport, pnvme_rport->port_id);
1435                 if (!ndlp) {
1436                         lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
1437                                          "6055 Could not find node for "
1438                                          "DID %x\n",
1439                                          pnvme_rport->port_id);
1440                         return;
1441                 }
1442         }
1443
1444         /* The remote node has to be ready to send an abort. */
1445         if ((ndlp->nlp_state != NLP_STE_MAPPED_NODE) &&
1446             !(ndlp->nlp_type & NLP_NVME_TARGET)) {
1447                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE | LOG_NVME_ABTS,
1448                                  "6048 rport %p, DID x%06x not ready for "
1449                                  "IO. State x%x, Type x%x\n",
1450                                  rport, pnvme_rport->port_id,
1451                                  ndlp->nlp_state, ndlp->nlp_type);
1452                 return;
1453         }
1454
1455         /* If the hba is getting reset, this flag is set.  It is
1456          * cleared when the reset is complete and rings reestablished.
1457          */
1458         spin_lock_irqsave(&phba->hbalock, flags);
1459         /* driver queued commands are in process of being flushed */
1460         if (phba->hba_flag & HBA_NVME_IOQ_FLUSH) {
1461                 spin_unlock_irqrestore(&phba->hbalock, flags);
1462                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME,
1463                                  "6139 Driver in reset cleanup - flushing "
1464                                  "NVME Req now.  hba_flag x%x\n",
1465                                  phba->hba_flag);
1466                 return;
1467         }
1468
1469         lpfc_nbuf = (struct lpfc_nvme_buf *)pnvme_fcreq->private;
1470         if (!lpfc_nbuf) {
1471                 spin_unlock_irqrestore(&phba->hbalock, flags);
1472                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME,
1473                                  "6140 NVME IO req has no matching lpfc nvme "
1474                                  "io buffer.  Skipping abort req.\n");
1475                 return;
1476         } else if (!lpfc_nbuf->nvmeCmd) {
1477                 spin_unlock_irqrestore(&phba->hbalock, flags);
1478                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME,
1479                                  "6141 lpfc NVME IO req has no nvme_fcreq "
1480                                  "io buffer.  Skipping abort req.\n");
1481                 return;
1482         }
1483
1484         /*
1485          * The lpfc_nbuf and the mapped nvme_fcreq in the driver's
1486          * state must match the nvme_fcreq passed by the nvme
1487          * transport.  If they don't match, it is likely the driver
1488          * has already completed the NVME IO and the nvme transport
1489          * has not seen it yet.
1490          */
1491         if (lpfc_nbuf->nvmeCmd != pnvme_fcreq) {
1492                 spin_unlock_irqrestore(&phba->hbalock, flags);
1493                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME,
1494                                  "6143 NVME req mismatch: "
1495                                  "lpfc_nbuf %p nvmeCmd %p, "
1496                                  "pnvme_fcreq %p.  Skipping Abort\n",
1497                                  lpfc_nbuf, lpfc_nbuf->nvmeCmd,
1498                                  pnvme_fcreq);
1499                 return;
1500         }
1501
1502         /* Don't abort IOs no longer on the pending queue. */
1503         nvmereq_wqe = &lpfc_nbuf->cur_iocbq;
1504         if (!(nvmereq_wqe->iocb_flag & LPFC_IO_ON_TXCMPLQ)) {
1505                 spin_unlock_irqrestore(&phba->hbalock, flags);
1506                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME,
1507                                  "6142 NVME IO req %p not queued - skipping "
1508                                  "abort req\n",
1509                                  pnvme_fcreq);
1510                 return;
1511         }
1512
1513         lpfc_nvmeio_data(phba, "NVME FCP ABORT: xri x%x idx %d to %06x\n",
1514                          nvmereq_wqe->sli4_xritag,
1515                          nvmereq_wqe->hba_wqidx, ndlp->nlp_DID);
1516
1517         /* Outstanding abort is in progress */
1518         if (nvmereq_wqe->iocb_flag & LPFC_DRIVER_ABORTED) {
1519                 spin_unlock_irqrestore(&phba->hbalock, flags);
1520                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME,
1521                                  "6144 Outstanding NVME I/O Abort Request "
1522                                  "still pending on nvme_fcreq %p, "
1523                                  "lpfc_ncmd %p\n",
1524                                  pnvme_fcreq, lpfc_nbuf);
1525                 return;
1526         }
1527
1528         abts_buf = __lpfc_sli_get_iocbq(phba);
1529         if (!abts_buf) {
1530                 spin_unlock_irqrestore(&phba->hbalock, flags);
1531                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME,
1532                                  "6136 No available abort wqes. Skipping "
1533                                  "Abts req for nvme_fcreq %p.\n",
1534                                  pnvme_fcreq);
1535                 return;
1536         }
1537
1538         /* Ready - mark outstanding as aborted by driver. */
1539         nvmereq_wqe->iocb_flag |= LPFC_DRIVER_ABORTED;
1540
1541         /* Complete prepping the abort wqe and issue to the FW. */
1542         abts_wqe = &abts_buf->wqe;
1543
1544         /* WQEs are reused.  Clear stale data and set key fields to
1545          * zero like ia, iaab, iaar, xri_tag, and ctxt_tag.
1546          */
1547         memset(abts_wqe, 0, sizeof(union lpfc_wqe));
1548         bf_set(abort_cmd_criteria, &abts_wqe->abort_cmd, T_XRI_TAG);
1549
1550         /* word 7 */
1551         bf_set(wqe_ct, &abts_wqe->abort_cmd.wqe_com, 0);
1552         bf_set(wqe_cmnd, &abts_wqe->abort_cmd.wqe_com, CMD_ABORT_XRI_CX);
1553         bf_set(wqe_class, &abts_wqe->abort_cmd.wqe_com,
1554                nvmereq_wqe->iocb.ulpClass);
1555
1556         /* word 8 - tell the FW to abort the IO associated with this
1557          * outstanding exchange ID.
1558          */
1559         abts_wqe->abort_cmd.wqe_com.abort_tag = nvmereq_wqe->sli4_xritag;
1560
1561         /* word 9 - this is the iotag for the abts_wqe completion. */
1562         bf_set(wqe_reqtag, &abts_wqe->abort_cmd.wqe_com,
1563                abts_buf->iotag);
1564
1565         /* word 10 */
1566         bf_set(wqe_wqid, &abts_wqe->abort_cmd.wqe_com, nvmereq_wqe->hba_wqidx);
1567         bf_set(wqe_qosd, &abts_wqe->abort_cmd.wqe_com, 1);
1568         bf_set(wqe_lenloc, &abts_wqe->abort_cmd.wqe_com, LPFC_WQE_LENLOC_NONE);
1569
1570         /* word 11 */
1571         bf_set(wqe_cmd_type, &abts_wqe->abort_cmd.wqe_com, OTHER_COMMAND);
1572         bf_set(wqe_wqec, &abts_wqe->abort_cmd.wqe_com, 1);
1573         bf_set(wqe_cqid, &abts_wqe->abort_cmd.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
1574
1575         /* ABTS WQE must go to the same WQ as the WQE to be aborted */
1576         abts_buf->iocb_flag |= LPFC_IO_NVME;
1577         abts_buf->hba_wqidx = nvmereq_wqe->hba_wqidx;
1578         abts_buf->vport = vport;
1579         abts_buf->wqe_cmpl = lpfc_nvme_abort_fcreq_cmpl;
1580         ret_val = lpfc_sli4_issue_wqe(phba, LPFC_FCP_RING, abts_buf);
1581         spin_unlock_irqrestore(&phba->hbalock, flags);
1582         if (ret_val == IOCB_ERROR) {
1583                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME,
1584                                  "6137 Failed abts issue_wqe with status x%x "
1585                                  "for nvme_fcreq %p.\n",
1586                                  ret_val, pnvme_fcreq);
1587                 lpfc_sli_release_iocbq(phba, abts_buf);
1588                 return;
1589         }
1590
1591         lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME,
1592                          "6138 Transport Abort NVME Request Issued for\n"
1593                          "ox_id x%x on reqtag x%x\n",
1594                          nvmereq_wqe->sli4_xritag,
1595                          abts_buf->iotag);
1596 }
1597
1598 /* Declare and initialization an instance of the FC NVME template. */
1599 static struct nvme_fc_port_template lpfc_nvme_template = {
1600         /* initiator-based functions */
1601         .localport_delete  = lpfc_nvme_localport_delete,
1602         .remoteport_delete = lpfc_nvme_remoteport_delete,
1603         .create_queue = lpfc_nvme_create_queue,
1604         .delete_queue = lpfc_nvme_delete_queue,
1605         .ls_req       = lpfc_nvme_ls_req,
1606         .fcp_io       = lpfc_nvme_fcp_io_submit,
1607         .ls_abort     = lpfc_nvme_ls_abort,
1608         .fcp_abort    = lpfc_nvme_fcp_abort,
1609
1610         .max_hw_queues = 1,
1611         .max_sgl_segments = LPFC_NVME_DEFAULT_SEGS,
1612         .max_dif_sgl_segments = LPFC_NVME_DEFAULT_SEGS,
1613         .dma_boundary = 0xFFFFFFFF,
1614
1615         /* Sizes of additional private data for data structures.
1616          * No use for the last two sizes at this time.
1617          */
1618         .local_priv_sz = sizeof(struct lpfc_nvme_lport),
1619         .remote_priv_sz = sizeof(struct lpfc_nvme_rport),
1620         .lsrqst_priv_sz = 0,
1621         .fcprqst_priv_sz = 0,
1622 };
1623
1624 /**
1625  * lpfc_sli4_post_nvme_sgl_block - post a block of nvme sgl list to firmware
1626  * @phba: pointer to lpfc hba data structure.
1627  * @nblist: pointer to nvme buffer list.
1628  * @count: number of scsi buffers on the list.
1629  *
1630  * This routine is invoked to post a block of @count scsi sgl pages from a
1631  * SCSI buffer list @nblist to the HBA using non-embedded mailbox command.
1632  * No Lock is held.
1633  *
1634  **/
1635 static int
1636 lpfc_sli4_post_nvme_sgl_block(struct lpfc_hba *phba,
1637                               struct list_head *nblist,
1638                               int count)
1639 {
1640         struct lpfc_nvme_buf *lpfc_ncmd;
1641         struct lpfc_mbx_post_uembed_sgl_page1 *sgl;
1642         struct sgl_page_pairs *sgl_pg_pairs;
1643         void *viraddr;
1644         LPFC_MBOXQ_t *mbox;
1645         uint32_t reqlen, alloclen, pg_pairs;
1646         uint32_t mbox_tmo;
1647         uint16_t xritag_start = 0;
1648         int rc = 0;
1649         uint32_t shdr_status, shdr_add_status;
1650         dma_addr_t pdma_phys_bpl1;
1651         union lpfc_sli4_cfg_shdr *shdr;
1652
1653         /* Calculate the requested length of the dma memory */
1654         reqlen = count * sizeof(struct sgl_page_pairs) +
1655                  sizeof(union lpfc_sli4_cfg_shdr) + sizeof(uint32_t);
1656         if (reqlen > SLI4_PAGE_SIZE) {
1657                 lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
1658                                 "6118 Block sgl registration required DMA "
1659                                 "size (%d) great than a page\n", reqlen);
1660                 return -ENOMEM;
1661         }
1662         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
1663         if (!mbox) {
1664                 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
1665                                 "6119 Failed to allocate mbox cmd memory\n");
1666                 return -ENOMEM;
1667         }
1668
1669         /* Allocate DMA memory and set up the non-embedded mailbox command */
1670         alloclen = lpfc_sli4_config(phba, mbox, LPFC_MBOX_SUBSYSTEM_FCOE,
1671                                 LPFC_MBOX_OPCODE_FCOE_POST_SGL_PAGES, reqlen,
1672                                 LPFC_SLI4_MBX_NEMBED);
1673
1674         if (alloclen < reqlen) {
1675                 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
1676                                 "6120 Allocated DMA memory size (%d) is "
1677                                 "less than the requested DMA memory "
1678                                 "size (%d)\n", alloclen, reqlen);
1679                 lpfc_sli4_mbox_cmd_free(phba, mbox);
1680                 return -ENOMEM;
1681         }
1682
1683         /* Get the first SGE entry from the non-embedded DMA memory */
1684         viraddr = mbox->sge_array->addr[0];
1685
1686         /* Set up the SGL pages in the non-embedded DMA pages */
1687         sgl = (struct lpfc_mbx_post_uembed_sgl_page1 *)viraddr;
1688         sgl_pg_pairs = &sgl->sgl_pg_pairs;
1689
1690         pg_pairs = 0;
1691         list_for_each_entry(lpfc_ncmd, nblist, list) {
1692                 /* Set up the sge entry */
1693                 sgl_pg_pairs->sgl_pg0_addr_lo =
1694                         cpu_to_le32(putPaddrLow(lpfc_ncmd->dma_phys_sgl));
1695                 sgl_pg_pairs->sgl_pg0_addr_hi =
1696                         cpu_to_le32(putPaddrHigh(lpfc_ncmd->dma_phys_sgl));
1697                 if (phba->cfg_sg_dma_buf_size > SGL_PAGE_SIZE)
1698                         pdma_phys_bpl1 = lpfc_ncmd->dma_phys_sgl +
1699                                                 SGL_PAGE_SIZE;
1700                 else
1701                         pdma_phys_bpl1 = 0;
1702                 sgl_pg_pairs->sgl_pg1_addr_lo =
1703                         cpu_to_le32(putPaddrLow(pdma_phys_bpl1));
1704                 sgl_pg_pairs->sgl_pg1_addr_hi =
1705                         cpu_to_le32(putPaddrHigh(pdma_phys_bpl1));
1706                 /* Keep the first xritag on the list */
1707                 if (pg_pairs == 0)
1708                         xritag_start = lpfc_ncmd->cur_iocbq.sli4_xritag;
1709                 sgl_pg_pairs++;
1710                 pg_pairs++;
1711         }
1712         bf_set(lpfc_post_sgl_pages_xri, sgl, xritag_start);
1713         bf_set(lpfc_post_sgl_pages_xricnt, sgl, pg_pairs);
1714         /* Perform endian conversion if necessary */
1715         sgl->word0 = cpu_to_le32(sgl->word0);
1716
1717         if (!phba->sli4_hba.intr_enable)
1718                 rc = lpfc_sli_issue_mbox(phba, mbox, MBX_POLL);
1719         else {
1720                 mbox_tmo = lpfc_mbox_tmo_val(phba, mbox);
1721                 rc = lpfc_sli_issue_mbox_wait(phba, mbox, mbox_tmo);
1722         }
1723         shdr = (union lpfc_sli4_cfg_shdr *)&sgl->cfg_shdr;
1724         shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
1725         shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);
1726         if (rc != MBX_TIMEOUT)
1727                 lpfc_sli4_mbox_cmd_free(phba, mbox);
1728         if (shdr_status || shdr_add_status || rc) {
1729                 lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
1730                                 "6125 POST_SGL_BLOCK mailbox command failed "
1731                                 "status x%x add_status x%x mbx status x%x\n",
1732                                 shdr_status, shdr_add_status, rc);
1733                 rc = -ENXIO;
1734         }
1735         return rc;
1736 }
1737
1738 /**
1739  * lpfc_post_nvme_sgl_list - Post blocks of nvme buffer sgls from a list
1740  * @phba: pointer to lpfc hba data structure.
1741  * @post_nblist: pointer to the nvme buffer list.
1742  *
1743  * This routine walks a list of nvme buffers that was passed in. It attempts
1744  * to construct blocks of nvme buffer sgls which contains contiguous xris and
1745  * uses the non-embedded SGL block post mailbox commands to post to the port.
1746  * For single NVME buffer sgl with non-contiguous xri, if any, it shall use
1747  * embedded SGL post mailbox command for posting. The @post_nblist passed in
1748  * must be local list, thus no lock is needed when manipulate the list.
1749  *
1750  * Returns: 0 = failure, non-zero number of successfully posted buffers.
1751  **/
1752 static int
1753 lpfc_post_nvme_sgl_list(struct lpfc_hba *phba,
1754                              struct list_head *post_nblist, int sb_count)
1755 {
1756         struct lpfc_nvme_buf *lpfc_ncmd, *lpfc_ncmd_next;
1757         int status, sgl_size;
1758         int post_cnt = 0, block_cnt = 0, num_posting = 0, num_posted = 0;
1759         dma_addr_t pdma_phys_sgl1;
1760         int last_xritag = NO_XRI;
1761         int cur_xritag;
1762         LIST_HEAD(prep_nblist);
1763         LIST_HEAD(blck_nblist);
1764         LIST_HEAD(nvme_nblist);
1765
1766         /* sanity check */
1767         if (sb_count <= 0)
1768                 return -EINVAL;
1769
1770         sgl_size = phba->cfg_sg_dma_buf_size;
1771
1772         list_for_each_entry_safe(lpfc_ncmd, lpfc_ncmd_next, post_nblist, list) {
1773                 list_del_init(&lpfc_ncmd->list);
1774                 block_cnt++;
1775                 if ((last_xritag != NO_XRI) &&
1776                     (lpfc_ncmd->cur_iocbq.sli4_xritag != last_xritag + 1)) {
1777                         /* a hole in xri block, form a sgl posting block */
1778                         list_splice_init(&prep_nblist, &blck_nblist);
1779                         post_cnt = block_cnt - 1;
1780                         /* prepare list for next posting block */
1781                         list_add_tail(&lpfc_ncmd->list, &prep_nblist);
1782                         block_cnt = 1;
1783                 } else {
1784                         /* prepare list for next posting block */
1785                         list_add_tail(&lpfc_ncmd->list, &prep_nblist);
1786                         /* enough sgls for non-embed sgl mbox command */
1787                         if (block_cnt == LPFC_NEMBED_MBOX_SGL_CNT) {
1788                                 list_splice_init(&prep_nblist, &blck_nblist);
1789                                 post_cnt = block_cnt;
1790                                 block_cnt = 0;
1791                         }
1792                 }
1793                 num_posting++;
1794                 last_xritag = lpfc_ncmd->cur_iocbq.sli4_xritag;
1795
1796                 /* end of repost sgl list condition for NVME buffers */
1797                 if (num_posting == sb_count) {
1798                         if (post_cnt == 0) {
1799                                 /* last sgl posting block */
1800                                 list_splice_init(&prep_nblist, &blck_nblist);
1801                                 post_cnt = block_cnt;
1802                         } else if (block_cnt == 1) {
1803                                 /* last single sgl with non-contiguous xri */
1804                                 if (sgl_size > SGL_PAGE_SIZE)
1805                                         pdma_phys_sgl1 =
1806                                                 lpfc_ncmd->dma_phys_sgl +
1807                                                 SGL_PAGE_SIZE;
1808                                 else
1809                                         pdma_phys_sgl1 = 0;
1810                                 cur_xritag = lpfc_ncmd->cur_iocbq.sli4_xritag;
1811                                 status = lpfc_sli4_post_sgl(phba,
1812                                                 lpfc_ncmd->dma_phys_sgl,
1813                                                 pdma_phys_sgl1, cur_xritag);
1814                                 if (status) {
1815                                         /* failure, put on abort nvme list */
1816                                         lpfc_ncmd->flags |= LPFC_SBUF_XBUSY;
1817                                 } else {
1818                                         /* success, put on NVME buffer list */
1819                                         lpfc_ncmd->flags &= ~LPFC_SBUF_XBUSY;
1820                                         lpfc_ncmd->status = IOSTAT_SUCCESS;
1821                                         num_posted++;
1822                                 }
1823                                 /* success, put on NVME buffer sgl list */
1824                                 list_add_tail(&lpfc_ncmd->list, &nvme_nblist);
1825                         }
1826                 }
1827
1828                 /* continue until a nembed page worth of sgls */
1829                 if (post_cnt == 0)
1830                         continue;
1831
1832                 /* post block of NVME buffer list sgls */
1833                 status = lpfc_sli4_post_nvme_sgl_block(phba, &blck_nblist,
1834                                                        post_cnt);
1835
1836                 /* don't reset xirtag due to hole in xri block */
1837                 if (block_cnt == 0)
1838                         last_xritag = NO_XRI;
1839
1840                 /* reset NVME buffer post count for next round of posting */
1841                 post_cnt = 0;
1842
1843                 /* put posted NVME buffer-sgl posted on NVME buffer sgl list */
1844                 while (!list_empty(&blck_nblist)) {
1845                         list_remove_head(&blck_nblist, lpfc_ncmd,
1846                                          struct lpfc_nvme_buf, list);
1847                         if (status) {
1848                                 /* failure, put on abort nvme list */
1849                                 lpfc_ncmd->flags |= LPFC_SBUF_XBUSY;
1850                         } else {
1851                                 /* success, put on NVME buffer list */
1852                                 lpfc_ncmd->flags &= ~LPFC_SBUF_XBUSY;
1853                                 lpfc_ncmd->status = IOSTAT_SUCCESS;
1854                                 num_posted++;
1855                         }
1856                         list_add_tail(&lpfc_ncmd->list, &nvme_nblist);
1857                 }
1858         }
1859         /* Push NVME buffers with sgl posted to the available list */
1860         while (!list_empty(&nvme_nblist)) {
1861                 list_remove_head(&nvme_nblist, lpfc_ncmd,
1862                                  struct lpfc_nvme_buf, list);
1863                 lpfc_release_nvme_buf(phba, lpfc_ncmd);
1864         }
1865         return num_posted;
1866 }
1867
1868 /**
1869  * lpfc_repost_nvme_sgl_list - Repost all the allocated nvme buffer sgls
1870  * @phba: pointer to lpfc hba data structure.
1871  *
1872  * This routine walks the list of nvme buffers that have been allocated and
1873  * repost them to the port by using SGL block post. This is needed after a
1874  * pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine
1875  * is responsible for moving all nvme buffers on the lpfc_abts_nvme_sgl_list
1876  * to the lpfc_nvme_buf_list. If the repost fails, reject all nvme buffers.
1877  *
1878  * Returns: 0 = success, non-zero failure.
1879  **/
1880 int
1881 lpfc_repost_nvme_sgl_list(struct lpfc_hba *phba)
1882 {
1883         LIST_HEAD(post_nblist);
1884         int num_posted, rc = 0;
1885
1886         /* get all NVME buffers need to repost to a local list */
1887         spin_lock_irq(&phba->nvme_buf_list_get_lock);
1888         spin_lock(&phba->nvme_buf_list_put_lock);
1889         list_splice_init(&phba->lpfc_nvme_buf_list_get, &post_nblist);
1890         list_splice(&phba->lpfc_nvme_buf_list_put, &post_nblist);
1891         spin_unlock(&phba->nvme_buf_list_put_lock);
1892         spin_unlock_irq(&phba->nvme_buf_list_get_lock);
1893
1894         /* post the list of nvme buffer sgls to port if available */
1895         if (!list_empty(&post_nblist)) {
1896                 num_posted = lpfc_post_nvme_sgl_list(phba, &post_nblist,
1897                                                 phba->sli4_hba.nvme_xri_cnt);
1898                 /* failed to post any nvme buffer, return error */
1899                 if (num_posted == 0)
1900                         rc = -EIO;
1901         }
1902         return rc;
1903 }
1904
1905 /**
1906  * lpfc_new_nvme_buf - Scsi buffer allocator for HBA with SLI4 IF spec
1907  * @vport: The virtual port for which this call being executed.
1908  * @num_to_allocate: The requested number of buffers to allocate.
1909  *
1910  * This routine allocates nvme buffers for device with SLI-4 interface spec,
1911  * the nvme buffer contains all the necessary information needed to initiate
1912  * a NVME I/O. After allocating up to @num_to_allocate NVME buffers and put
1913  * them on a list, it post them to the port by using SGL block post.
1914  *
1915  * Return codes:
1916  *   int - number of nvme buffers that were allocated and posted.
1917  *   0 = failure, less than num_to_alloc is a partial failure.
1918  **/
1919 static int
1920 lpfc_new_nvme_buf(struct lpfc_vport *vport, int num_to_alloc)
1921 {
1922         struct lpfc_hba *phba = vport->phba;
1923         struct lpfc_nvme_buf *lpfc_ncmd;
1924         struct lpfc_iocbq *pwqeq;
1925         union lpfc_wqe128 *wqe;
1926         struct sli4_sge *sgl;
1927         dma_addr_t pdma_phys_sgl;
1928         uint16_t iotag, lxri = 0;
1929         int bcnt, num_posted, sgl_size;
1930         LIST_HEAD(prep_nblist);
1931         LIST_HEAD(post_nblist);
1932         LIST_HEAD(nvme_nblist);
1933
1934         sgl_size = phba->cfg_sg_dma_buf_size;
1935
1936         for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
1937                 lpfc_ncmd = kzalloc(sizeof(struct lpfc_nvme_buf), GFP_KERNEL);
1938                 if (!lpfc_ncmd)
1939                         break;
1940                 /*
1941                  * Get memory from the pci pool to map the virt space to
1942                  * pci bus space for an I/O. The DMA buffer includes the
1943                  * number of SGE's necessary to support the sg_tablesize.
1944                  */
1945                 lpfc_ncmd->data = pci_pool_alloc(phba->lpfc_sg_dma_buf_pool,
1946                                                  GFP_KERNEL,
1947                                                  &lpfc_ncmd->dma_handle);
1948                 if (!lpfc_ncmd->data) {
1949                         kfree(lpfc_ncmd);
1950                         break;
1951                 }
1952                 memset(lpfc_ncmd->data, 0, phba->cfg_sg_dma_buf_size);
1953
1954                 lxri = lpfc_sli4_next_xritag(phba);
1955                 if (lxri == NO_XRI) {
1956                         pci_pool_free(phba->lpfc_sg_dma_buf_pool,
1957                                       lpfc_ncmd->data, lpfc_ncmd->dma_handle);
1958                         kfree(lpfc_ncmd);
1959                         break;
1960                 }
1961                 pwqeq = &(lpfc_ncmd->cur_iocbq);
1962                 wqe = (union lpfc_wqe128 *)&pwqeq->wqe;
1963
1964                 /* Allocate iotag for lpfc_ncmd->cur_iocbq. */
1965                 iotag = lpfc_sli_next_iotag(phba, pwqeq);
1966                 if (iotag == 0) {
1967                         pci_pool_free(phba->lpfc_sg_dma_buf_pool,
1968                                       lpfc_ncmd->data, lpfc_ncmd->dma_handle);
1969                         kfree(lpfc_ncmd);
1970                         lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
1971                                         "6121 Failed to allocated IOTAG for"
1972                                         " XRI:0x%x\n", lxri);
1973                         lpfc_sli4_free_xri(phba, lxri);
1974                         break;
1975                 }
1976                 pwqeq->sli4_lxritag = lxri;
1977                 pwqeq->sli4_xritag = phba->sli4_hba.xri_ids[lxri];
1978                 pwqeq->iocb_flag |= LPFC_IO_NVME;
1979                 pwqeq->context1 = lpfc_ncmd;
1980                 pwqeq->wqe_cmpl = lpfc_nvme_io_cmd_wqe_cmpl;
1981
1982                 /* Initialize local short-hand pointers. */
1983                 lpfc_ncmd->nvme_sgl = lpfc_ncmd->data;
1984                 sgl = lpfc_ncmd->nvme_sgl;
1985                 pdma_phys_sgl = lpfc_ncmd->dma_handle;
1986                 lpfc_ncmd->dma_phys_sgl = pdma_phys_sgl;
1987
1988                 /* Rsp SGE will be filled in when we rcv an IO
1989                  * from the NVME Layer to be sent.
1990                  * The cmd is going to be embedded so we need a SKIP SGE.
1991                  */
1992                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
1993                 bf_set(lpfc_sli4_sge_last, sgl, 0);
1994                 sgl->word2 = cpu_to_le32(sgl->word2);
1995                 /* Fill in word 3 / sgl_len during cmd submission */
1996
1997                 lpfc_ncmd->cur_iocbq.context1 = lpfc_ncmd;
1998
1999                 /* Word 7 */
2000                 bf_set(wqe_erp, &wqe->generic.wqe_com, 0);
2001                 /* NVME upper layers will time things out, if needed */
2002                 bf_set(wqe_tmo, &wqe->generic.wqe_com, 0);
2003
2004                 /* Word 10 */
2005                 bf_set(wqe_ebde_cnt, &wqe->generic.wqe_com, 0);
2006                 bf_set(wqe_dbde, &wqe->generic.wqe_com, 1);
2007
2008                 /* add the nvme buffer to a post list */
2009                 list_add_tail(&lpfc_ncmd->list, &post_nblist);
2010                 spin_lock_irq(&phba->nvme_buf_list_get_lock);
2011                 phba->sli4_hba.nvme_xri_cnt++;
2012                 spin_unlock_irq(&phba->nvme_buf_list_get_lock);
2013         }
2014         lpfc_printf_log(phba, KERN_INFO, LOG_NVME,
2015                         "6114 Allocate %d out of %d requested new NVME "
2016                         "buffers\n", bcnt, num_to_alloc);
2017
2018         /* post the list of nvme buffer sgls to port if available */
2019         if (!list_empty(&post_nblist))
2020                 num_posted = lpfc_post_nvme_sgl_list(phba,
2021                                                      &post_nblist, bcnt);
2022         else
2023                 num_posted = 0;
2024
2025         return num_posted;
2026 }
2027
2028 /**
2029  * lpfc_get_nvme_buf - Get a nvme buffer from lpfc_nvme_buf_list of the HBA
2030  * @phba: The HBA for which this call is being executed.
2031  *
2032  * This routine removes a nvme buffer from head of @phba lpfc_nvme_buf_list list
2033  * and returns to caller.
2034  *
2035  * Return codes:
2036  *   NULL - Error
2037  *   Pointer to lpfc_nvme_buf - Success
2038  **/
2039 static struct lpfc_nvme_buf *
2040 lpfc_get_nvme_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
2041 {
2042         struct lpfc_nvme_buf *lpfc_ncmd, *lpfc_ncmd_next;
2043         unsigned long iflag = 0;
2044         int found = 0;
2045
2046         spin_lock_irqsave(&phba->nvme_buf_list_get_lock, iflag);
2047         list_for_each_entry_safe(lpfc_ncmd, lpfc_ncmd_next,
2048                                  &phba->lpfc_nvme_buf_list_get, list) {
2049                 if (lpfc_test_rrq_active(phba, ndlp,
2050                                          lpfc_ncmd->cur_iocbq.sli4_lxritag))
2051                         continue;
2052                 list_del(&lpfc_ncmd->list);
2053                 found = 1;
2054                 break;
2055         }
2056         if (!found) {
2057                 spin_lock(&phba->nvme_buf_list_put_lock);
2058                 list_splice(&phba->lpfc_nvme_buf_list_put,
2059                             &phba->lpfc_nvme_buf_list_get);
2060                 INIT_LIST_HEAD(&phba->lpfc_nvme_buf_list_put);
2061                 spin_unlock(&phba->nvme_buf_list_put_lock);
2062                 list_for_each_entry_safe(lpfc_ncmd, lpfc_ncmd_next,
2063                                          &phba->lpfc_nvme_buf_list_get, list) {
2064                         if (lpfc_test_rrq_active(
2065                                 phba, ndlp, lpfc_ncmd->cur_iocbq.sli4_lxritag))
2066                                 continue;
2067                         list_del(&lpfc_ncmd->list);
2068                         found = 1;
2069                         break;
2070                 }
2071         }
2072         spin_unlock_irqrestore(&phba->nvme_buf_list_get_lock, iflag);
2073         if (!found)
2074                 return NULL;
2075         return  lpfc_ncmd;
2076 }
2077
2078 /**
2079  * lpfc_release_nvme_buf: Return a nvme buffer back to hba nvme buf list.
2080  * @phba: The Hba for which this call is being executed.
2081  * @lpfc_ncmd: The nvme buffer which is being released.
2082  *
2083  * This routine releases @lpfc_ncmd nvme buffer by adding it to tail of @phba
2084  * lpfc_nvme_buf_list list. For SLI4 XRI's are tied to the nvme buffer
2085  * and cannot be reused for at least RA_TOV amount of time if it was
2086  * aborted.
2087  **/
2088 static void
2089 lpfc_release_nvme_buf(struct lpfc_hba *phba, struct lpfc_nvme_buf *lpfc_ncmd)
2090 {
2091         unsigned long iflag = 0;
2092
2093         lpfc_ncmd->nonsg_phys = 0;
2094         if (lpfc_ncmd->flags & LPFC_SBUF_XBUSY) {
2095                 spin_lock_irqsave(&phba->sli4_hba.abts_nvme_buf_list_lock,
2096                                         iflag);
2097                 lpfc_ncmd->nvmeCmd = NULL;
2098                 list_add_tail(&lpfc_ncmd->list,
2099                         &phba->sli4_hba.lpfc_abts_nvme_buf_list);
2100                 spin_unlock_irqrestore(&phba->sli4_hba.abts_nvme_buf_list_lock,
2101                                         iflag);
2102         } else {
2103                 lpfc_ncmd->nvmeCmd = NULL;
2104                 lpfc_ncmd->cur_iocbq.iocb_flag = LPFC_IO_NVME;
2105                 spin_lock_irqsave(&phba->nvme_buf_list_put_lock, iflag);
2106                 list_add_tail(&lpfc_ncmd->list, &phba->lpfc_nvme_buf_list_put);
2107                 spin_unlock_irqrestore(&phba->nvme_buf_list_put_lock, iflag);
2108         }
2109 }
2110
2111 /**
2112  * lpfc_nvme_create_localport - Create/Bind an nvme localport instance.
2113  * @pvport - the lpfc_vport instance requesting a localport.
2114  *
2115  * This routine is invoked to create an nvme localport instance to bind
2116  * to the nvme_fc_transport.  It is called once during driver load
2117  * like lpfc_create_shost after all other services are initialized.
2118  * It requires a vport, vpi, and wwns at call time.  Other localport
2119  * parameters are modified as the driver's FCID and the Fabric WWN
2120  * are established.
2121  *
2122  * Return codes
2123  *      0 - successful
2124  *      -ENOMEM - no heap memory available
2125  *      other values - from nvme registration upcall
2126  **/
2127 int
2128 lpfc_nvme_create_localport(struct lpfc_vport *vport)
2129 {
2130         int ret = 0;
2131         struct lpfc_hba  *phba = vport->phba;
2132         struct nvme_fc_port_info nfcp_info;
2133         struct nvme_fc_local_port *localport;
2134         struct lpfc_nvme_lport *lport;
2135         int len;
2136
2137         /* Initialize this localport instance.  The vport wwn usage ensures
2138          * that NPIV is accounted for.
2139          */
2140         memset(&nfcp_info, 0, sizeof(struct nvme_fc_port_info));
2141         nfcp_info.port_role = FC_PORT_ROLE_NVME_INITIATOR;
2142         nfcp_info.node_name = wwn_to_u64(vport->fc_nodename.u.wwn);
2143         nfcp_info.port_name = wwn_to_u64(vport->fc_portname.u.wwn);
2144
2145         /* For now need + 1 to get around NVME transport logic */
2146         lpfc_nvme_template.max_sgl_segments = phba->cfg_sg_seg_cnt + 1;
2147         lpfc_nvme_template.max_hw_queues = phba->cfg_nvme_io_channel;
2148
2149         /* localport is allocated from the stack, but the registration
2150          * call allocates heap memory as well as the private area.
2151          */
2152 #if (IS_ENABLED(CONFIG_NVME_FC))
2153         ret = nvme_fc_register_localport(&nfcp_info, &lpfc_nvme_template,
2154                                          &vport->phba->pcidev->dev, &localport);
2155 #else
2156         ret = -ENOMEM;
2157 #endif
2158         if (!ret) {
2159                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME | LOG_NVME_DISC,
2160                                  "6005 Successfully registered local "
2161                                  "NVME port num %d, localP %p, private %p, "
2162                                  "sg_seg %d\n",
2163                                  localport->port_num, localport,
2164                                  localport->private,
2165                                  lpfc_nvme_template.max_sgl_segments);
2166
2167                 /* Private is our lport size declared in the template. */
2168                 lport = (struct lpfc_nvme_lport *)localport->private;
2169                 vport->localport = localport;
2170                 lport->vport = vport;
2171                 INIT_LIST_HEAD(&lport->rport_list);
2172                 vport->nvmei_support = 1;
2173                 len  = lpfc_new_nvme_buf(vport, phba->sli4_hba.nvme_xri_max);
2174                 vport->phba->total_nvme_bufs += len;
2175         }
2176
2177         return ret;
2178 }
2179
2180 /**
2181  * lpfc_nvme_destroy_localport - Destroy lpfc_nvme bound to nvme transport.
2182  * @pnvme: pointer to lpfc nvme data structure.
2183  *
2184  * This routine is invoked to destroy all lports bound to the phba.
2185  * The lport memory was allocated by the nvme fc transport and is
2186  * released there.  This routine ensures all rports bound to the
2187  * lport have been disconnected.
2188  *
2189  **/
2190 void
2191 lpfc_nvme_destroy_localport(struct lpfc_vport *vport)
2192 {
2193 #if (IS_ENABLED(CONFIG_NVME_FC))
2194         struct nvme_fc_local_port *localport;
2195         struct lpfc_nvme_lport *lport;
2196         struct lpfc_nvme_rport *rport = NULL, *rport_next = NULL;
2197         int ret;
2198
2199         if (vport->nvmei_support == 0)
2200                 return;
2201
2202         localport = vport->localport;
2203         vport->localport = NULL;
2204         lport = (struct lpfc_nvme_lport *)localport->private;
2205
2206         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
2207                          "6011 Destroying NVME localport %p\n",
2208                          localport);
2209         list_for_each_entry_safe(rport, rport_next, &lport->rport_list, list) {
2210                 /* The last node ref has to get released now before the rport
2211                  * private memory area is released by the transport.
2212                  */
2213                 list_del(&rport->list);
2214
2215                 init_completion(&rport->rport_unreg_done);
2216                 ret = nvme_fc_unregister_remoteport(rport->remoteport);
2217                 if (ret)
2218                         lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
2219                                          "6008 rport fail destroy %x\n", ret);
2220                 wait_for_completion_timeout(&rport->rport_unreg_done, 5);
2221         }
2222
2223         /* lport's rport list is clear.  Unregister
2224          * lport and release resources.
2225          */
2226         init_completion(&lport->lport_unreg_done);
2227         ret = nvme_fc_unregister_localport(localport);
2228         wait_for_completion_timeout(&lport->lport_unreg_done, 5);
2229
2230         /* Regardless of the unregister upcall response, clear
2231          * nvmei_support.  All rports are unregistered and the
2232          * driver will clean up.
2233          */
2234         vport->nvmei_support = 0;
2235         if (ret == 0) {
2236                 lpfc_printf_vlog(vport,
2237                                  KERN_INFO, LOG_NVME_DISC,
2238                                  "6009 Unregistered lport Success\n");
2239         } else {
2240                 lpfc_printf_vlog(vport,
2241                                  KERN_INFO, LOG_NVME_DISC,
2242                                  "6010 Unregistered lport "
2243                                  "Failed, status x%x\n",
2244                                  ret);
2245         }
2246 #endif
2247 }
2248
2249 void
2250 lpfc_nvme_update_localport(struct lpfc_vport *vport)
2251 {
2252         struct nvme_fc_local_port *localport;
2253         struct lpfc_nvme_lport *lport;
2254
2255         localport = vport->localport;
2256         lport = (struct lpfc_nvme_lport *)localport->private;
2257
2258         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
2259                          "6012 Update NVME lport %p did x%x\n",
2260                          localport, vport->fc_myDID);
2261
2262         localport->port_id = vport->fc_myDID;
2263         if (localport->port_id == 0)
2264                 localport->port_role = FC_PORT_ROLE_NVME_DISCOVERY;
2265         else
2266                 localport->port_role = FC_PORT_ROLE_NVME_INITIATOR;
2267
2268         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
2269                          "6030 bound lport %p to DID x%06x\n",
2270                          lport, localport->port_id);
2271
2272 }
2273
2274 int
2275 lpfc_nvme_register_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
2276 {
2277 #if (IS_ENABLED(CONFIG_NVME_FC))
2278         int ret = 0;
2279         struct nvme_fc_local_port *localport;
2280         struct lpfc_nvme_lport *lport;
2281         struct lpfc_nvme_rport *rport;
2282         struct nvme_fc_remote_port *remote_port;
2283         struct nvme_fc_port_info rpinfo;
2284
2285         lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_NVME_DISC,
2286                          "6006 Register NVME PORT. DID x%06x nlptype x%x\n",
2287                          ndlp->nlp_DID, ndlp->nlp_type);
2288
2289         localport = vport->localport;
2290         lport = (struct lpfc_nvme_lport *)localport->private;
2291
2292         if (ndlp->nlp_type & (NLP_NVME_TARGET | NLP_NVME_INITIATOR)) {
2293
2294                 /* The driver isn't expecting the rport wwn to change
2295                  * but it might get a different DID on a different
2296                  * fabric.
2297                  */
2298                 list_for_each_entry(rport, &lport->rport_list, list) {
2299                         if (rport->remoteport->port_name !=
2300                             wwn_to_u64(ndlp->nlp_portname.u.wwn))
2301                                 continue;
2302                         lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_NVME_DISC,
2303                                          "6035 lport %p, found matching rport "
2304                                          "at wwpn 0x%llx, Data: x%x x%x x%x "
2305                                          "x%06x\n",
2306                                          lport,
2307                                          rport->remoteport->port_name,
2308                                          rport->remoteport->port_id,
2309                                          rport->remoteport->port_role,
2310                                          ndlp->nlp_type,
2311                                          ndlp->nlp_DID);
2312                         remote_port = rport->remoteport;
2313                         if ((remote_port->port_id == 0) &&
2314                             (remote_port->port_role ==
2315                              FC_PORT_ROLE_NVME_DISCOVERY)) {
2316                                 remote_port->port_id = ndlp->nlp_DID;
2317                                 remote_port->port_role &=
2318                                         ~FC_PORT_ROLE_NVME_DISCOVERY;
2319                                 if (ndlp->nlp_type & NLP_NVME_TARGET)
2320                                         remote_port->port_role |=
2321                                                 FC_PORT_ROLE_NVME_TARGET;
2322                                 if (ndlp->nlp_type & NLP_NVME_INITIATOR)
2323                                         remote_port->port_role |=
2324                                                 FC_PORT_ROLE_NVME_INITIATOR;
2325
2326                                 lpfc_printf_vlog(ndlp->vport, KERN_INFO,
2327                                                  LOG_NVME_DISC,
2328                                                  "6014 Rebinding lport to "
2329                                                  "rport wwpn 0x%llx, "
2330                                                  "Data: x%x x%x x%x x%06x\n",
2331                                                  remote_port->port_name,
2332                                                  remote_port->port_id,
2333                                                  remote_port->port_role,
2334                                                  ndlp->nlp_type,
2335                                                  ndlp->nlp_DID);
2336                         }
2337                         return 0;
2338                 }
2339
2340                 /* NVME rports are not preserved across devloss.
2341                  * Just register this instance.
2342                  */
2343                 rpinfo.port_id = ndlp->nlp_DID;
2344                 rpinfo.port_role = 0;
2345                 if (ndlp->nlp_type & NLP_NVME_TARGET)
2346                         rpinfo.port_role |= FC_PORT_ROLE_NVME_TARGET;
2347                 if (ndlp->nlp_type & NLP_NVME_INITIATOR)
2348                         rpinfo.port_role |= FC_PORT_ROLE_NVME_INITIATOR;
2349                 rpinfo.port_name = wwn_to_u64(ndlp->nlp_portname.u.wwn);
2350                 rpinfo.node_name = wwn_to_u64(ndlp->nlp_nodename.u.wwn);
2351                 ret = nvme_fc_register_remoteport(localport, &rpinfo,
2352                                                   &remote_port);
2353                 if (!ret) {
2354                         rport = remote_port->private;
2355                         rport->remoteport = remote_port;
2356                         rport->lport = lport;
2357                         rport->ndlp = lpfc_nlp_get(ndlp);
2358                         if (!rport->ndlp)
2359                                 return -1;
2360                         ndlp->nrport = rport;
2361                         INIT_LIST_HEAD(&rport->list);
2362                         list_add_tail(&rport->list, &lport->rport_list);
2363                         lpfc_printf_vlog(vport, KERN_INFO,
2364                                          LOG_NVME_DISC | LOG_NODE,
2365                                          "6022 Binding new rport to lport %p "
2366                                          "Rport WWNN 0x%llx, Rport WWPN 0x%llx "
2367                                          "DID x%06x Role x%x\n",
2368                                          lport,
2369                                          rpinfo.node_name, rpinfo.port_name,
2370                                          rpinfo.port_id, rpinfo.port_role);
2371                 } else {
2372                         lpfc_printf_vlog(vport, KERN_ERR,
2373                                          LOG_NVME_DISC | LOG_NODE,
2374                                          "6031 RemotePort Registration failed "
2375                                          "err: %d, DID x%06x\n",
2376                                          ret, ndlp->nlp_DID);
2377                 }
2378         } else {
2379                 ret = -EINVAL;
2380                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
2381                                  "6027 Unknown nlp_type x%x on DID x%06x "
2382                                  "ndlp %p.  Not Registering nvme rport\n",
2383                                  ndlp->nlp_type, ndlp->nlp_DID, ndlp);
2384         }
2385         return ret;
2386 #else
2387         return 0;
2388 #endif
2389 }
2390
2391 /* lpfc_nvme_unregister_port - unbind the DID and port_role from this rport.
2392  *
2393  * There is no notion of Devloss or rport recovery from the current
2394  * nvme_transport perspective.  Loss of an rport just means IO cannot
2395  * be sent and recovery is completely up to the initator.
2396  * For now, the driver just unbinds the DID and port_role so that
2397  * no further IO can be issued.  Changes are planned for later.
2398  *
2399  * Notes - the ndlp reference count is not decremented here since
2400  * since there is no nvme_transport api for devloss.  Node ref count
2401  * is only adjusted in driver unload.
2402  */
2403 void
2404 lpfc_nvme_unregister_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
2405 {
2406 #if (IS_ENABLED(CONFIG_NVME_FC))
2407         int ret;
2408         struct nvme_fc_local_port *localport;
2409         struct lpfc_nvme_lport *lport;
2410         struct lpfc_nvme_rport *rport;
2411         struct nvme_fc_remote_port *remoteport;
2412
2413         localport = vport->localport;
2414
2415         /* This is fundamental error.  The localport is always
2416          * available until driver unload.  Just exit.
2417          */
2418         if (!localport)
2419                 return;
2420
2421         lport = (struct lpfc_nvme_lport *)localport->private;
2422         if (!lport)
2423                 goto input_err;
2424
2425         rport = ndlp->nrport;
2426         if (!rport)
2427                 goto input_err;
2428
2429         remoteport = rport->remoteport;
2430         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
2431                          "6033 Unreg nvme remoteport %p, portname x%llx, "
2432                          "port_id x%06x, portstate x%x port type x%x\n",
2433                          remoteport, remoteport->port_name,
2434                          remoteport->port_id, remoteport->port_state,
2435                          ndlp->nlp_type);
2436
2437         /* Sanity check ndlp type.  Only call for NVME ports. Don't
2438          * clear any rport state until the transport calls back.
2439          */
2440         if (ndlp->nlp_type & (NLP_NVME_TARGET | NLP_NVME_INITIATOR)) {
2441                 init_completion(&rport->rport_unreg_done);
2442                 ret = nvme_fc_unregister_remoteport(remoteport);
2443                 if (ret != 0) {
2444                         lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
2445                                          "6167 NVME unregister failed %d "
2446                                          "port_state x%x\n",
2447                                          ret, remoteport->port_state);
2448                 }
2449
2450                 /* Wait for the driver's delete completion routine to finish
2451                  * before proceeding.  This guarantees the transport and driver
2452                  * have completed the unreg process.
2453                  */
2454                 ret = wait_for_completion_timeout(&rport->rport_unreg_done, 5);
2455                 if (ret == 0) {
2456                         lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
2457                                          "6169 Unreg nvme wait failed %d\n",
2458                                          ret);
2459                 }
2460         }
2461         return;
2462
2463  input_err:
2464 #endif
2465         lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
2466                          "6168: State error: lport %p, rport%p FCID x%06x\n",
2467                          vport->localport, ndlp->rport, ndlp->nlp_DID);
2468 }
2469
2470 /**
2471  * lpfc_sli4_nvme_xri_aborted - Fast-path process of NVME xri abort
2472  * @phba: pointer to lpfc hba data structure.
2473  * @axri: pointer to the fcp xri abort wcqe structure.
2474  *
2475  * This routine is invoked by the worker thread to process a SLI4 fast-path
2476  * FCP aborted xri.
2477  **/
2478 void
2479 lpfc_sli4_nvme_xri_aborted(struct lpfc_hba *phba,
2480                            struct sli4_wcqe_xri_aborted *axri)
2481 {
2482         uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
2483         uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
2484         struct lpfc_nvme_buf *lpfc_ncmd, *next_lpfc_ncmd;
2485         struct lpfc_nodelist *ndlp;
2486         unsigned long iflag = 0;
2487         int rrq_empty = 0;
2488
2489         if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_NVME))
2490                 return;
2491         spin_lock_irqsave(&phba->hbalock, iflag);
2492         spin_lock(&phba->sli4_hba.abts_nvme_buf_list_lock);
2493         list_for_each_entry_safe(lpfc_ncmd, next_lpfc_ncmd,
2494                                  &phba->sli4_hba.lpfc_abts_nvme_buf_list,
2495                                  list) {
2496                 if (lpfc_ncmd->cur_iocbq.sli4_xritag == xri) {
2497                         list_del(&lpfc_ncmd->list);
2498                         lpfc_ncmd->flags &= ~LPFC_SBUF_XBUSY;
2499                         lpfc_ncmd->status = IOSTAT_SUCCESS;
2500                         spin_unlock(
2501                                 &phba->sli4_hba.abts_nvme_buf_list_lock);
2502
2503                         rrq_empty = list_empty(&phba->active_rrq_list);
2504                         spin_unlock_irqrestore(&phba->hbalock, iflag);
2505                         ndlp = lpfc_ncmd->ndlp;
2506                         if (ndlp) {
2507                                 lpfc_set_rrq_active(
2508                                         phba, ndlp,
2509                                         lpfc_ncmd->cur_iocbq.sli4_lxritag,
2510                                         rxid, 1);
2511                                 lpfc_sli4_abts_err_handler(phba, ndlp, axri);
2512                         }
2513                         lpfc_release_nvme_buf(phba, lpfc_ncmd);
2514                         if (rrq_empty)
2515                                 lpfc_worker_wake_up(phba);
2516                         return;
2517                 }
2518         }
2519         spin_unlock(&phba->sli4_hba.abts_nvme_buf_list_lock);
2520         spin_unlock_irqrestore(&phba->hbalock, iflag);
2521 }