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_INFO, 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.
 190          */
 191         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
 192                         "6146 remoteport delete complete %p\n",
 193                         remoteport);
 194         ndlp->nrport = NULL;
 195         lpfc_nlp_put(ndlp);
 196
 197  rport_err:
 198         /* This call has to execute as long as the rport is valid.
 199          * Release any threads waiting for the unreg to complete.
 200          */
 201         complete(&rport->rport_unreg_done);
 202 }
 203
 204 static void
 205 lpfc_nvme_cmpl_gen_req(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
 206                        struct lpfc_wcqe_complete *wcqe)
 207 {
 208         struct lpfc_vport *vport = cmdwqe->vport;
 209         uint32_t status;
 210         struct nvmefc_ls_req *pnvme_lsreq;
 211         struct lpfc_dmabuf *buf_ptr;
 212         struct lpfc_nodelist *ndlp;
 213
 214         atomic_inc(&vport->phba->fc4NvmeLsCmpls);
 215
 216         pnvme_lsreq = (struct nvmefc_ls_req *)cmdwqe->context2;
 217         status = bf_get(lpfc_wcqe_c_status, wcqe) & LPFC_IOCB_STATUS_MASK;
 218         ndlp = (struct lpfc_nodelist *)cmdwqe->context1;
 219         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
 220                          "6047 nvme cmpl Enter "
 221                          "Data %p DID %x Xri: %x status %x cmd:%p lsreg:%p "
 222                          "bmp:%p ndlp:%p\n",
 223                          pnvme_lsreq, ndlp ? ndlp->nlp_DID : 0,
 224                          cmdwqe->sli4_xritag, status,
 225                          cmdwqe, pnvme_lsreq, cmdwqe->context3, ndlp);
 226
 227         lpfc_nvmeio_data(phba, "NVME LS  CMPL: xri x%x stat x%x parm x%x\n",
 228                          cmdwqe->sli4_xritag, status, wcqe->parameter);
 229
 230         if (cmdwqe->context3) {
 231                 buf_ptr = (struct lpfc_dmabuf *)cmdwqe->context3;
 232                 lpfc_mbuf_free(phba, buf_ptr->virt, buf_ptr->phys);
 233                 kfree(buf_ptr);
 234                 cmdwqe->context3 = NULL;
 235         }
 236         if (pnvme_lsreq->done)
 237                 pnvme_lsreq->done(pnvme_lsreq, status);
 238         else
 239                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
 240                                  "6046 nvme cmpl without done call back? "
 241                                  "Data %p DID %x Xri: %x status %x\n",
 242                                 pnvme_lsreq, ndlp ? ndlp->nlp_DID : 0,
 243                                 cmdwqe->sli4_xritag, status);
 244         if (ndlp) {
 245                 lpfc_nlp_put(ndlp);
 246                 cmdwqe->context1 = NULL;
 247         }
 248         lpfc_sli_release_iocbq(phba, cmdwqe);
 249 }
 250
 251 static int
 252 lpfc_nvme_gen_req(struct lpfc_vport *vport, struct lpfc_dmabuf *bmp,
 253                   struct lpfc_dmabuf *inp,
 254                  struct nvmefc_ls_req *pnvme_lsreq,
 255              void (*cmpl)(struct lpfc_hba *, struct lpfc_iocbq *,
 256                            struct lpfc_wcqe_complete *),
 257              struct lpfc_nodelist *ndlp, uint32_t num_entry,
 258              uint32_t tmo, uint8_t retry)
 259 {
 260         struct lpfc_hba  *phba = vport->phba;
 261         union lpfc_wqe *wqe;
 262         struct lpfc_iocbq *genwqe;
 263         struct ulp_bde64 *bpl;
 264         struct ulp_bde64 bde;
 265         int i, rc, xmit_len, first_len;
 266
 267         /* Allocate buffer for  command WQE */
 268         genwqe = lpfc_sli_get_iocbq(phba);
 269         if (genwqe == NULL)
 270                 return 1;
 271
 272         wqe = &genwqe->wqe;
 273         memset(wqe, 0, sizeof(union lpfc_wqe));
 274
 275         genwqe->context3 = (uint8_t *)bmp;
 276         genwqe->iocb_flag |= LPFC_IO_NVME_LS;
 277
 278         /* Save for completion so we can release these resources */
 279         genwqe->context1 = lpfc_nlp_get(ndlp);
 280         genwqe->context2 = (uint8_t *)pnvme_lsreq;
 281         /* Fill in payload, bp points to frame payload */
 282
 283         if (!tmo)
 284                 /* FC spec states we need 3 * ratov for CT requests */
 285                 tmo = (3 * phba->fc_ratov);
 286
 287         /* For this command calculate the xmit length of the request bde. */
 288         xmit_len = 0;
 289         first_len = 0;
 290         bpl = (struct ulp_bde64 *)bmp->virt;
 291         for (i = 0; i < num_entry; i++) {
 292                 bde.tus.w = bpl[i].tus.w;
 293                 if (bde.tus.f.bdeFlags != BUFF_TYPE_BDE_64)
 294                         break;
 295                 xmit_len += bde.tus.f.bdeSize;
 296                 if (i == 0)
 297                         first_len = xmit_len;
 298         }
 299
 300         genwqe->rsvd2 = num_entry;
 301         genwqe->hba_wqidx = 0;
 302
 303         /* Words 0 - 2 */
 304         wqe->generic.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 305         wqe->generic.bde.tus.f.bdeSize = first_len;
 306         wqe->generic.bde.addrLow = bpl[0].addrLow;
 307         wqe->generic.bde.addrHigh = bpl[0].addrHigh;
 308
 309         /* Word 3 */
 310         wqe->gen_req.request_payload_len = first_len;
 311
 312         /* Word 4 */
 313
 314         /* Word 5 */
 315         bf_set(wqe_dfctl, &wqe->gen_req.wge_ctl, 0);
 316         bf_set(wqe_si, &wqe->gen_req.wge_ctl, 1);
 317         bf_set(wqe_la, &wqe->gen_req.wge_ctl, 1);
 318         bf_set(wqe_rctl, &wqe->gen_req.wge_ctl, FC_RCTL_ELS4_REQ);
 319         bf_set(wqe_type, &wqe->gen_req.wge_ctl, FC_TYPE_NVME);
 320
 321         /* Word 6 */
 322         bf_set(wqe_ctxt_tag, &wqe->gen_req.wqe_com,
 323                phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
 324         bf_set(wqe_xri_tag, &wqe->gen_req.wqe_com, genwqe->sli4_xritag);
 325
 326         /* Word 7 */
 327         bf_set(wqe_tmo, &wqe->gen_req.wqe_com, (vport->phba->fc_ratov-1));
 328         bf_set(wqe_class, &wqe->gen_req.wqe_com, CLASS3);
 329         bf_set(wqe_cmnd, &wqe->gen_req.wqe_com, CMD_GEN_REQUEST64_WQE);
 330         bf_set(wqe_ct, &wqe->gen_req.wqe_com, SLI4_CT_RPI);
 331
 332         /* Word 8 */
 333         wqe->gen_req.wqe_com.abort_tag = genwqe->iotag;
 334
 335         /* Word 9 */
 336         bf_set(wqe_reqtag, &wqe->gen_req.wqe_com, genwqe->iotag);
 337
 338         /* Word 10 */
 339         bf_set(wqe_dbde, &wqe->gen_req.wqe_com, 1);
 340         bf_set(wqe_iod, &wqe->gen_req.wqe_com, LPFC_WQE_IOD_READ);
 341         bf_set(wqe_qosd, &wqe->gen_req.wqe_com, 1);
 342         bf_set(wqe_lenloc, &wqe->gen_req.wqe_com, LPFC_WQE_LENLOC_NONE);
 343         bf_set(wqe_ebde_cnt, &wqe->gen_req.wqe_com, 0);
 344
 345         /* Word 11 */
 346         bf_set(wqe_cqid, &wqe->gen_req.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
 347         bf_set(wqe_cmd_type, &wqe->gen_req.wqe_com, OTHER_COMMAND);
 348
 349
 350         /* Issue GEN REQ WQE for NPORT <did> */
 351         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
 352                          "6050 Issue GEN REQ WQE to NPORT x%x "
 353                          "Data: x%x x%x wq:%p lsreq:%p bmp:%p xmit:%d 1st:%d\n",
 354                          ndlp->nlp_DID, genwqe->iotag,
 355                          vport->port_state,
 356                         genwqe, pnvme_lsreq, bmp, xmit_len, first_len);
 357         genwqe->wqe_cmpl = cmpl;
 358         genwqe->iocb_cmpl = NULL;
 359         genwqe->drvrTimeout = tmo + LPFC_DRVR_TIMEOUT;
 360         genwqe->vport = vport;
 361         genwqe->retry = retry;
 362
 363         lpfc_nvmeio_data(phba, "NVME LS  XMIT: xri x%x iotag x%x to x%06x\n",
 364                          genwqe->sli4_xritag, genwqe->iotag, ndlp->nlp_DID);
 365
 366         rc = lpfc_sli4_issue_wqe(phba, LPFC_ELS_RING, genwqe);
 367         if (rc) {
 368                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 369                                  "6045 Issue GEN REQ WQE to NPORT x%x "
 370                                  "Data: x%x x%x\n",
 371                                  ndlp->nlp_DID, genwqe->iotag,
 372                                  vport->port_state);
 373                 lpfc_sli_release_iocbq(phba, genwqe);
 374                 return 1;
 375         }
 376         return 0;
 377 }
 378
 379 /**
 380  * lpfc_nvme_ls_req - Issue an Link Service request
 381  * @lpfc_pnvme: Pointer to the driver's nvme instance data
 382  * @lpfc_nvme_lport: Pointer to the driver's local port data
 383  * @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
 384  *
 385  * Driver registers this routine to handle any link service request
 386  * from the nvme_fc transport to a remote nvme-aware port.
 387  *
 388  * Return value :
 389  *   0 - Success
 390  *   TODO: What are the failure codes.
 391  **/
 392 static int
 393 lpfc_nvme_ls_req(struct nvme_fc_local_port *pnvme_lport,
 394                  struct nvme_fc_remote_port *pnvme_rport,
 395                  struct nvmefc_ls_req *pnvme_lsreq)
 396 {
 397         int ret = 0;
 398         struct lpfc_nvme_lport *lport;
 399         struct lpfc_vport *vport;
 400         struct lpfc_nodelist *ndlp;
 401         struct ulp_bde64 *bpl;
 402         struct lpfc_dmabuf *bmp;
 403         uint16_t ntype, nstate;
 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         if (vport->load_flag & FC_UNLOADING)
 420                 return -ENODEV;
 421
 422         ndlp = lpfc_findnode_did(vport, pnvme_rport->port_id);
 423         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
 424                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE | LOG_NVME_IOERR,
 425                                  "6051 DID x%06x not an active rport.\n",
 426                                  pnvme_rport->port_id);
 427                 return -ENODEV;
 428         }
 429
 430         /* The remote node has to be a mapped nvme target or an
 431          * unmapped nvme initiator or it's an error.
 432          */
 433         ntype = ndlp->nlp_type;
 434         nstate = ndlp->nlp_state;
 435         if ((ntype & NLP_NVME_TARGET && nstate != NLP_STE_MAPPED_NODE) ||
 436             (ntype & NLP_NVME_INITIATOR && nstate != NLP_STE_UNMAPPED_NODE)) {
 437                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE | LOG_NVME_IOERR,
 438                                  "6088 DID x%06x not ready for "
 439                                  "IO. State x%x, Type x%x\n",
 440                                  pnvme_rport->port_id,
 441                                  ndlp->nlp_state, ndlp->nlp_type);
 442                 return -ENODEV;
 443         }
 444         bmp = kmalloc(sizeof(struct lpfc_dmabuf), GFP_KERNEL);
 445         if (!bmp) {
 446
 447                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
 448                                  "6044 Could not find node for DID %x\n",
 449                                  pnvme_rport->port_id);
 450                 return 2;
 451         }
 452         INIT_LIST_HEAD(&bmp->list);
 453         bmp->virt = lpfc_mbuf_alloc(vport->phba, MEM_PRI, &(bmp->phys));
 454         if (!bmp->virt) {
 455                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
 456                                  "6042 Could not find node for DID %x\n",
 457                                  pnvme_rport->port_id);
 458                 kfree(bmp);
 459                 return 3;
 460         }
 461         bpl = (struct ulp_bde64 *)bmp->virt;
 462         bpl->addrHigh = le32_to_cpu(putPaddrHigh(pnvme_lsreq->rqstdma));
 463         bpl->addrLow = le32_to_cpu(putPaddrLow(pnvme_lsreq->rqstdma));
 464         bpl->tus.f.bdeFlags = 0;
 465         bpl->tus.f.bdeSize = pnvme_lsreq->rqstlen;
 466         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 467         bpl++;
 468
 469         bpl->addrHigh = le32_to_cpu(putPaddrHigh(pnvme_lsreq->rspdma));
 470         bpl->addrLow = le32_to_cpu(putPaddrLow(pnvme_lsreq->rspdma));
 471         bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
 472         bpl->tus.f.bdeSize = pnvme_lsreq->rsplen;
 473         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 474
 475         /* Expand print to include key fields. */
 476         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
 477                          "6149 ENTER.  lport %p, rport %p lsreq%p rqstlen:%d "
 478                          "rsplen:%d %pad %pad\n",
 479                          pnvme_lport, pnvme_rport,
 480                          pnvme_lsreq, pnvme_lsreq->rqstlen,
 481                          pnvme_lsreq->rsplen, &pnvme_lsreq->rqstdma,
 482                          &pnvme_lsreq->rspdma);
 483
 484         atomic_inc(&vport->phba->fc4NvmeLsRequests);
 485
 486         /* Hardcode the wait to 30 seconds.  Connections are failing otherwise.
 487          * This code allows it all to work.
 488          */
 489         ret = lpfc_nvme_gen_req(vport, bmp, pnvme_lsreq->rqstaddr,
 490                                 pnvme_lsreq, lpfc_nvme_cmpl_gen_req,
 491                                 ndlp, 2, 30, 0);
 492         if (ret != WQE_SUCCESS) {
 493                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
 494                                  "6052 EXIT. issue ls wqe failed lport %p, "
 495                                  "rport %p lsreq%p Status %x DID %x\n",
 496                                  pnvme_lport, pnvme_rport, pnvme_lsreq,
 497                                  ret, ndlp->nlp_DID);
 498                 lpfc_mbuf_free(vport->phba, bmp->virt, bmp->phys);
 499                 kfree(bmp);
 500                 return ret;
 501         }
 502
 503         /* Stub in routine and return 0 for now. */
 504         return ret;
 505 }
 506
 507 /**
 508  * lpfc_nvme_ls_abort - Issue an Link Service request
 509  * @lpfc_pnvme: Pointer to the driver's nvme instance data
 510  * @lpfc_nvme_lport: Pointer to the driver's local port data
 511  * @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
 512  *
 513  * Driver registers this routine to handle any link service request
 514  * from the nvme_fc transport to a remote nvme-aware port.
 515  *
 516  * Return value :
 517  *   0 - Success
 518  *   TODO: What are the failure codes.
 519  **/
 520 static void
 521 lpfc_nvme_ls_abort(struct nvme_fc_local_port *pnvme_lport,
 522                    struct nvme_fc_remote_port *pnvme_rport,
 523                    struct nvmefc_ls_req *pnvme_lsreq)
 524 {
 525         struct lpfc_nvme_lport *lport;
 526         struct lpfc_vport *vport;
 527         struct lpfc_hba *phba;
 528         struct lpfc_nodelist *ndlp;
 529         LIST_HEAD(abort_list);
 530         struct lpfc_sli_ring *pring;
 531         struct lpfc_iocbq *wqe, *next_wqe;
 532
 533         lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
 534         vport = lport->vport;
 535         phba = vport->phba;
 536
 537         ndlp = lpfc_findnode_did(vport, pnvme_rport->port_id);
 538         if (!ndlp) {
 539                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
 540                                  "6049 Could not find node for DID %x\n",
 541                                  pnvme_rport->port_id);
 542                 return;
 543         }
 544
 545         /* Expand print to include key fields. */
 546         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS,
 547                          "6040 ENTER.  lport %p, rport %p lsreq %p rqstlen:%d "
 548                          "rsplen:%d %pad %pad\n",
 549                          pnvme_lport, pnvme_rport,
 550                          pnvme_lsreq, pnvme_lsreq->rqstlen,
 551                          pnvme_lsreq->rsplen, &pnvme_lsreq->rqstdma,
 552                          &pnvme_lsreq->rspdma);
 553
 554         /*
 555          * Lock the ELS ring txcmplq and build a local list of all ELS IOs
 556          * that need an ABTS.  The IOs need to stay on the txcmplq so that
 557          * the abort operation completes them successfully.
 558          */
 559         pring = phba->sli4_hba.nvmels_wq->pring;
 560         spin_lock_irq(&phba->hbalock);
 561         spin_lock(&pring->ring_lock);
 562         list_for_each_entry_safe(wqe, next_wqe, &pring->txcmplq, list) {
 563                 /* Add to abort_list on on NDLP match. */
 564                 if (lpfc_check_sli_ndlp(phba, pring, wqe, ndlp)) {
 565                         wqe->iocb_flag |= LPFC_DRIVER_ABORTED;
 566                         list_add_tail(&wqe->dlist, &abort_list);
 567                 }
 568         }
 569         spin_unlock(&pring->ring_lock);
 570         spin_unlock_irq(&phba->hbalock);
 571
 572         /* Abort the targeted IOs and remove them from the abort list. */
 573         list_for_each_entry_safe(wqe, next_wqe, &abort_list, dlist) {
 574                 spin_lock_irq(&phba->hbalock);
 575                 list_del_init(&wqe->dlist);
 576                 lpfc_sli_issue_abort_iotag(phba, pring, wqe);
 577                 spin_unlock_irq(&phba->hbalock);
 578         }
 579 }
 580
 581 /* Fix up the existing sgls for NVME IO. */
 582 static void
 583 lpfc_nvme_adj_fcp_sgls(struct lpfc_vport *vport,
 584                        struct lpfc_nvme_buf *lpfc_ncmd,
 585                        struct nvmefc_fcp_req *nCmd)
 586 {
 587         struct sli4_sge *sgl;
 588         union lpfc_wqe128 *wqe;
 589         uint32_t *wptr, *dptr;
 590
 591         /*
 592          * Adjust the FCP_CMD and FCP_RSP DMA data and sge_len to
 593          * match NVME.  NVME sends 96 bytes. Also, use the
 594          * nvme commands command and response dma addresses
 595          * rather than the virtual memory to ease the restore
 596          * operation.
 597          */
 598         sgl = lpfc_ncmd->nvme_sgl;
 599         sgl->sge_len = cpu_to_le32(nCmd->cmdlen);
 600
 601         sgl++;
 602
 603         /* Setup the physical region for the FCP RSP */
 604         sgl->addr_hi = cpu_to_le32(putPaddrHigh(nCmd->rspdma));
 605         sgl->addr_lo = cpu_to_le32(putPaddrLow(nCmd->rspdma));
 606         sgl->word2 = le32_to_cpu(sgl->word2);
 607         if (nCmd->sg_cnt)
 608                 bf_set(lpfc_sli4_sge_last, sgl, 0);
 609         else
 610                 bf_set(lpfc_sli4_sge_last, sgl, 1);
 611         sgl->word2 = cpu_to_le32(sgl->word2);
 612         sgl->sge_len = cpu_to_le32(nCmd->rsplen);
 613
 614         /*
 615          * Get a local pointer to the built-in wqe and correct
 616          * the cmd size to match NVME's 96 bytes and fix
 617          * the dma address.
 618          */
 619
 620         /* 128 byte wqe support here */
 621         wqe = (union lpfc_wqe128 *)&lpfc_ncmd->cur_iocbq.wqe;
 622
 623         /* Word 0-2 - NVME CMND IU (embedded payload) */
 624         wqe->generic.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_IMMED;
 625         wqe->generic.bde.tus.f.bdeSize = 60;
 626         wqe->generic.bde.addrHigh = 0;
 627         wqe->generic.bde.addrLow =  64;  /* Word 16 */
 628
 629         /* Word 3 */
 630         bf_set(payload_offset_len, &wqe->fcp_icmd,
 631                (nCmd->rsplen + nCmd->cmdlen));
 632
 633         /* Word 10 */
 634         bf_set(wqe_nvme, &wqe->fcp_icmd.wqe_com, 1);
 635         bf_set(wqe_wqes, &wqe->fcp_icmd.wqe_com, 1);
 636
 637         /*
 638          * Embed the payload in the last half of the WQE
 639          * WQE words 16-30 get the NVME CMD IU payload
 640          *
 641          * WQE words 16-19 get payload Words 1-4
 642          * WQE words 20-21 get payload Words 6-7
 643          * WQE words 22-29 get payload Words 16-23
 644          */
 645         wptr = &wqe->words[16];  /* WQE ptr */
 646         dptr = (uint32_t *)nCmd->cmdaddr;  /* payload ptr */
 647         dptr++;                 /* Skip Word 0 in payload */
 648
 649         *wptr++ = *dptr++;      /* Word 1 */
 650         *wptr++ = *dptr++;      /* Word 2 */
 651         *wptr++ = *dptr++;      /* Word 3 */
 652         *wptr++ = *dptr++;      /* Word 4 */
 653         dptr++;                 /* Skip Word 5 in payload */
 654         *wptr++ = *dptr++;      /* Word 6 */
 655         *wptr++ = *dptr++;      /* Word 7 */
 656         dptr += 8;              /* Skip Words 8-15 in payload */
 657         *wptr++ = *dptr++;      /* Word 16 */
 658         *wptr++ = *dptr++;      /* Word 17 */
 659         *wptr++ = *dptr++;      /* Word 18 */
 660         *wptr++ = *dptr++;      /* Word 19 */
 661         *wptr++ = *dptr++;      /* Word 20 */
 662         *wptr++ = *dptr++;      /* Word 21 */
 663         *wptr++ = *dptr++;      /* Word 22 */
 664         *wptr   = *dptr;        /* Word 23 */
 665 }
 666
 667 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 668 static void
 669 lpfc_nvme_ktime(struct lpfc_hba *phba,
 670                 struct lpfc_nvme_buf *lpfc_ncmd)
 671 {
 672         uint64_t seg1, seg2, seg3, seg4;
 673         uint64_t segsum;
 674
 675         if (!lpfc_ncmd->ts_last_cmd ||
 676             !lpfc_ncmd->ts_cmd_start ||
 677             !lpfc_ncmd->ts_cmd_wqput ||
 678             !lpfc_ncmd->ts_isr_cmpl ||
 679             !lpfc_ncmd->ts_data_nvme)
 680                 return;
 681
 682         if (lpfc_ncmd->ts_data_nvme < lpfc_ncmd->ts_cmd_start)
 683                 return;
 684         if (lpfc_ncmd->ts_cmd_start < lpfc_ncmd->ts_last_cmd)
 685                 return;
 686         if (lpfc_ncmd->ts_cmd_wqput < lpfc_ncmd->ts_cmd_start)
 687                 return;
 688         if (lpfc_ncmd->ts_isr_cmpl < lpfc_ncmd->ts_cmd_wqput)
 689                 return;
 690         if (lpfc_ncmd->ts_data_nvme < lpfc_ncmd->ts_isr_cmpl)
 691                 return;
 692         /*
 693          * Segment 1 - Time from Last FCP command cmpl is handed
 694          * off to NVME Layer to start of next command.
 695          * Segment 2 - Time from Driver receives a IO cmd start
 696          * from NVME Layer to WQ put is done on IO cmd.
 697          * Segment 3 - Time from Driver WQ put is done on IO cmd
 698          * to MSI-X ISR for IO cmpl.
 699          * Segment 4 - Time from MSI-X ISR for IO cmpl to when
 700          * cmpl is handled off to the NVME Layer.
 701          */
 702         seg1 = lpfc_ncmd->ts_cmd_start - lpfc_ncmd->ts_last_cmd;
 703         if (seg1 > 5000000)  /* 5 ms - for sequential IOs only */
 704                 seg1 = 0;
 705
 706         /* Calculate times relative to start of IO */
 707         seg2 = (lpfc_ncmd->ts_cmd_wqput - lpfc_ncmd->ts_cmd_start);
 708         segsum = seg2;
 709         seg3 = lpfc_ncmd->ts_isr_cmpl - lpfc_ncmd->ts_cmd_start;
 710         if (segsum > seg3)
 711                 return;
 712         seg3 -= segsum;
 713         segsum += seg3;
 714
 715         seg4 = lpfc_ncmd->ts_data_nvme - lpfc_ncmd->ts_cmd_start;
 716         if (segsum > seg4)
 717                 return;
 718         seg4 -= segsum;
 719
 720         phba->ktime_data_samples++;
 721         phba->ktime_seg1_total += seg1;
 722         if (seg1 < phba->ktime_seg1_min)
 723                 phba->ktime_seg1_min = seg1;
 724         else if (seg1 > phba->ktime_seg1_max)
 725                 phba->ktime_seg1_max = seg1;
 726         phba->ktime_seg2_total += seg2;
 727         if (seg2 < phba->ktime_seg2_min)
 728                 phba->ktime_seg2_min = seg2;
 729         else if (seg2 > phba->ktime_seg2_max)
 730                 phba->ktime_seg2_max = seg2;
 731         phba->ktime_seg3_total += seg3;
 732         if (seg3 < phba->ktime_seg3_min)
 733                 phba->ktime_seg3_min = seg3;
 734         else if (seg3 > phba->ktime_seg3_max)
 735                 phba->ktime_seg3_max = seg3;
 736         phba->ktime_seg4_total += seg4;
 737         if (seg4 < phba->ktime_seg4_min)
 738                 phba->ktime_seg4_min = seg4;
 739         else if (seg4 > phba->ktime_seg4_max)
 740                 phba->ktime_seg4_max = seg4;
 741
 742         lpfc_ncmd->ts_last_cmd = 0;
 743         lpfc_ncmd->ts_cmd_start = 0;
 744         lpfc_ncmd->ts_cmd_wqput  = 0;
 745         lpfc_ncmd->ts_isr_cmpl = 0;
 746         lpfc_ncmd->ts_data_nvme = 0;
 747 }
 748 #endif
 749
 750 /**
 751  * lpfc_nvme_io_cmd_wqe_cmpl - Complete an NVME-over-FCP IO
 752  * @lpfc_pnvme: Pointer to the driver's nvme instance data
 753  * @lpfc_nvme_lport: Pointer to the driver's local port data
 754  * @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
 755  *
 756  * Driver registers this routine as it io request handler.  This
 757  * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
 758  * data structure to the rport indicated in @lpfc_nvme_rport.
 759  *
 760  * Return value :
 761  *   0 - Success
 762  *   TODO: What are the failure codes.
 763  **/
 764 static void
 765 lpfc_nvme_io_cmd_wqe_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pwqeIn,
 766                           struct lpfc_wcqe_complete *wcqe)
 767 {
 768         struct lpfc_nvme_buf *lpfc_ncmd =
 769                 (struct lpfc_nvme_buf *)pwqeIn->context1;
 770         struct lpfc_vport *vport = pwqeIn->vport;
 771         struct nvmefc_fcp_req *nCmd;
 772         struct nvme_fc_ersp_iu *ep;
 773         struct nvme_fc_cmd_iu *cp;
 774         struct lpfc_nvme_rport *rport;
 775         struct lpfc_nodelist *ndlp;
 776         struct lpfc_nvme_fcpreq_priv *freqpriv;
 777         unsigned long flags;
 778         uint32_t code;
 779         uint16_t cid, sqhd, data;
 780         uint32_t *ptr;
 781
 782         /* Sanity check on return of outstanding command */
 783         if (!lpfc_ncmd || !lpfc_ncmd->nvmeCmd || !lpfc_ncmd->nrport) {
 784                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE | LOG_NVME_IOERR,
 785                                  "6071 Completion pointers bad on wqe %p.\n",
 786                                  wcqe);
 787                 return;
 788         }
 789         atomic_inc(&phba->fc4NvmeIoCmpls);
 790
 791         nCmd = lpfc_ncmd->nvmeCmd;
 792         rport = lpfc_ncmd->nrport;
 793
 794         lpfc_nvmeio_data(phba, "NVME FCP CMPL: xri x%x stat x%x parm x%x\n",
 795                          lpfc_ncmd->cur_iocbq.sli4_xritag,
 796                          bf_get(lpfc_wcqe_c_status, wcqe), wcqe->parameter);
 797         /*
 798          * Catch race where our node has transitioned, but the
 799          * transport is still transitioning.
 800          */
 801         ndlp = rport->ndlp;
 802         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
 803                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE | LOG_NVME_IOERR,
 804                                  "6061 rport %p,  DID x%06x node not ready.\n",
 805                                  rport, rport->remoteport->port_id);
 806
 807                 ndlp = lpfc_findnode_did(vport, rport->remoteport->port_id);
 808                 if (!ndlp) {
 809                         lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_IOERR,
 810                                          "6062 Ignoring NVME cmpl.  No ndlp\n");
 811                         goto out_err;
 812                 }
 813         }
 814
 815         code = bf_get(lpfc_wcqe_c_code, wcqe);
 816         if (code == CQE_CODE_NVME_ERSP) {
 817                 /* For this type of CQE, we need to rebuild the rsp */
 818                 ep = (struct nvme_fc_ersp_iu *)nCmd->rspaddr;
 819
 820                 /*
 821                  * Get Command Id from cmd to plug into response. This
 822                  * code is not needed in the next NVME Transport drop.
 823                  */
 824                 cp = (struct nvme_fc_cmd_iu *)nCmd->cmdaddr;
 825                 cid = cp->sqe.common.command_id;
 826
 827                 /*
 828                  * RSN is in CQE word 2
 829                  * SQHD is in CQE Word 3 bits 15:0
 830                  * Cmd Specific info is in CQE Word 1
 831                  * and in CQE Word 0 bits 15:0
 832                  */
 833                 sqhd = bf_get(lpfc_wcqe_c_sqhead, wcqe);
 834
 835                 /* Now lets build the NVME ERSP IU */
 836                 ep->iu_len = cpu_to_be16(8);
 837                 ep->rsn = wcqe->parameter;
 838                 ep->xfrd_len = cpu_to_be32(nCmd->payload_length);
 839                 ep->rsvd12 = 0;
 840                 ptr = (uint32_t *)&ep->cqe.result.u64;
 841                 *ptr++ = wcqe->total_data_placed;
 842                 data = bf_get(lpfc_wcqe_c_ersp0, wcqe);
 843                 *ptr = (uint32_t)data;
 844                 ep->cqe.sq_head = sqhd;
 845                 ep->cqe.sq_id =  nCmd->sqid;
 846                 ep->cqe.command_id = cid;
 847                 ep->cqe.status = 0;
 848
 849                 lpfc_ncmd->status = IOSTAT_SUCCESS;
 850                 lpfc_ncmd->result = 0;
 851                 nCmd->rcv_rsplen = LPFC_NVME_ERSP_LEN;
 852                 nCmd->transferred_length = nCmd->payload_length;
 853         } else {
 854                 lpfc_ncmd->status = (bf_get(lpfc_wcqe_c_status, wcqe) &
 855                             LPFC_IOCB_STATUS_MASK);
 856                 lpfc_ncmd->result = (wcqe->parameter & IOERR_PARAM_MASK);
 857
 858                 /* For NVME, the only failure path that results in an
 859                  * IO error is when the adapter rejects it.  All other
 860                  * conditions are a success case and resolved by the
 861                  * transport.
 862                  * IOSTAT_FCP_RSP_ERROR means:
 863                  * 1. Length of data received doesn't match total
 864                  *    transfer length in WQE
 865                  * 2. If the RSP payload does NOT match these cases:
 866                  *    a. RSP length 12/24 bytes and all zeros
 867                  *    b. NVME ERSP
 868                  */
 869                 switch (lpfc_ncmd->status) {
 870                 case IOSTAT_SUCCESS:
 871                         nCmd->transferred_length = wcqe->total_data_placed;
 872                         nCmd->rcv_rsplen = 0;
 873                         nCmd->status = 0;
 874                         break;
 875                 case IOSTAT_FCP_RSP_ERROR:
 876                         nCmd->transferred_length = wcqe->total_data_placed;
 877                         nCmd->rcv_rsplen = wcqe->parameter;
 878                         nCmd->status = 0;
 879                         /* Sanity check */
 880                         if (nCmd->rcv_rsplen == LPFC_NVME_ERSP_LEN)
 881                                 break;
 882                         lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_IOERR,
 883                                          "6081 NVME Completion Protocol Error: "
 884                                          "xri %x status x%x result x%x "
 885                                          "placed x%x\n",
 886                                          lpfc_ncmd->cur_iocbq.sli4_xritag,
 887                                          lpfc_ncmd->status, lpfc_ncmd->result,
 888                                          wcqe->total_data_placed);
 889                         break;
 890                 case IOSTAT_LOCAL_REJECT:
 891                         /* Let fall through to set command final state. */
 892                         if (lpfc_ncmd->result == IOERR_ABORT_REQUESTED)
 893                                 lpfc_printf_vlog(vport, KERN_INFO,
 894                                          LOG_NVME_IOERR,
 895                                          "6032 Delay Aborted cmd %p "
 896                                          "nvme cmd %p, xri x%x, "
 897                                          "xb %d\n",
 898                                          lpfc_ncmd, nCmd,
 899                                          lpfc_ncmd->cur_iocbq.sli4_xritag,
 900                                          bf_get(lpfc_wcqe_c_xb, wcqe));
 901                 default:
 902 out_err:
 903                         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
 904                                          "6072 NVME Completion Error: xri %x "
 905                                          "status x%x result x%x placed x%x\n",
 906                                          lpfc_ncmd->cur_iocbq.sli4_xritag,
 907                                          lpfc_ncmd->status, lpfc_ncmd->result,
 908                                          wcqe->total_data_placed);
 909                         nCmd->transferred_length = 0;
 910                         nCmd->rcv_rsplen = 0;
 911                         nCmd->status = NVME_SC_INTERNAL;
 912                 }
 913         }
 914
 915         /* pick up SLI4 exhange busy condition */
 916         if (bf_get(lpfc_wcqe_c_xb, wcqe))
 917                 lpfc_ncmd->flags |= LPFC_SBUF_XBUSY;
 918         else
 919                 lpfc_ncmd->flags &= ~LPFC_SBUF_XBUSY;
 920
 921         if (ndlp && NLP_CHK_NODE_ACT(ndlp))
 922                 atomic_dec(&ndlp->cmd_pending);
 923
 924         /* Update stats and complete the IO.  There is
 925          * no need for dma unprep because the nvme_transport
 926          * owns the dma address.
 927          */
 928 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 929         if (lpfc_ncmd->ts_cmd_start) {
 930                 lpfc_ncmd->ts_isr_cmpl = pwqeIn->isr_timestamp;
 931                 lpfc_ncmd->ts_data_nvme = ktime_get_ns();
 932                 phba->ktime_last_cmd = lpfc_ncmd->ts_data_nvme;
 933                 lpfc_nvme_ktime(phba, lpfc_ncmd);
 934         }
 935         if (phba->cpucheck_on & LPFC_CHECK_NVME_IO) {
 936                 if (lpfc_ncmd->cpu != smp_processor_id())
 937                         lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_IOERR,
 938                                          "6701 CPU Check cmpl: "
 939                                          "cpu %d expect %d\n",
 940                                          smp_processor_id(), lpfc_ncmd->cpu);
 941                 if (lpfc_ncmd->cpu < LPFC_CHECK_CPU_CNT)
 942                         phba->cpucheck_cmpl_io[lpfc_ncmd->cpu]++;
 943         }
 944 #endif
 945         freqpriv = nCmd->private;
 946         freqpriv->nvme_buf = NULL;
 947
 948         /* NVME targets need completion held off until the abort exchange
 949          * completes.
 950          */
 951         if (!(lpfc_ncmd->flags & LPFC_SBUF_XBUSY))
 952                 nCmd->done(nCmd);
 953
 954         spin_lock_irqsave(&phba->hbalock, flags);
 955         lpfc_ncmd->nrport = NULL;
 956         spin_unlock_irqrestore(&phba->hbalock, flags);
 957
 958         /* Call release with XB=1 to queue the IO into the abort list. */
 959         lpfc_release_nvme_buf(phba, lpfc_ncmd);
 960 }
 961
 962
 963 /**
 964  * lpfc_nvme_prep_io_cmd - Issue an NVME-over-FCP IO
 965  * @lpfc_pnvme: Pointer to the driver's nvme instance data
 966  * @lpfc_nvme_lport: Pointer to the driver's local port data
 967  * @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
 968  * @lpfc_nvme_fcreq: IO request from nvme fc to driver.
 969  * @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue
 970  *
 971  * Driver registers this routine as it io request handler.  This
 972  * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
 973  * data structure to the rport indicated in @lpfc_nvme_rport.
 974  *
 975  * Return value :
 976  *   0 - Success
 977  *   TODO: What are the failure codes.
 978  **/
 979 static int
 980 lpfc_nvme_prep_io_cmd(struct lpfc_vport *vport,
 981                       struct lpfc_nvme_buf *lpfc_ncmd,
 982                       struct lpfc_nodelist *pnode)
 983 {
 984         struct lpfc_hba *phba = vport->phba;
 985         struct nvmefc_fcp_req *nCmd = lpfc_ncmd->nvmeCmd;
 986         struct lpfc_iocbq *pwqeq = &(lpfc_ncmd->cur_iocbq);
 987         union lpfc_wqe128 *wqe = (union lpfc_wqe128 *)&pwqeq->wqe;
 988         uint32_t req_len;
 989
 990         if (!pnode || !NLP_CHK_NODE_ACT(pnode))
 991                 return -EINVAL;
 992
 993         /*
 994          * There are three possibilities here - use scatter-gather segment, use
 995          * the single mapping, or neither.
 996          */
 997         wqe->fcp_iwrite.initial_xfer_len = 0;
 998         if (nCmd->sg_cnt) {
 999                 if (nCmd->io_dir == NVMEFC_FCP_WRITE) {
1000                         /* Word 5 */
1001                         if ((phba->cfg_nvme_enable_fb) &&
1002                             (pnode->nlp_flag & NLP_FIRSTBURST)) {
1003                                 req_len = lpfc_ncmd->nvmeCmd->payload_length;
1004                                 if (req_len < pnode->nvme_fb_size)
1005                                         wqe->fcp_iwrite.initial_xfer_len =
1006                                                 req_len;
1007                                 else
1008                                         wqe->fcp_iwrite.initial_xfer_len =
1009                                                 pnode->nvme_fb_size;
1010                         }
1011
1012                         /* Word 7 */
1013                         bf_set(wqe_cmnd, &wqe->generic.wqe_com,
1014                                CMD_FCP_IWRITE64_WQE);
1015                         bf_set(wqe_pu, &wqe->generic.wqe_com,
1016                                PARM_READ_CHECK);
1017
1018                         /* Word 10 */
1019                         bf_set(wqe_qosd, &wqe->fcp_iwrite.wqe_com, 0);
1020                         bf_set(wqe_iod, &wqe->fcp_iwrite.wqe_com,
1021                                LPFC_WQE_IOD_WRITE);
1022                         bf_set(wqe_lenloc, &wqe->fcp_iwrite.wqe_com,
1023                                LPFC_WQE_LENLOC_WORD4);
1024                         if (phba->cfg_nvme_oas)
1025                                 bf_set(wqe_oas, &wqe->fcp_iwrite.wqe_com, 1);
1026
1027                         /* Word 11 */
1028                         bf_set(wqe_cmd_type, &wqe->generic.wqe_com,
1029                                NVME_WRITE_CMD);
1030
1031                         atomic_inc(&phba->fc4NvmeOutputRequests);
1032                 } else {
1033                         /* Word 7 */
1034                         bf_set(wqe_cmnd, &wqe->generic.wqe_com,
1035                                CMD_FCP_IREAD64_WQE);
1036                         bf_set(wqe_pu, &wqe->generic.wqe_com,
1037                                PARM_READ_CHECK);
1038
1039                         /* Word 10 */
1040                         bf_set(wqe_qosd, &wqe->fcp_iread.wqe_com, 0);
1041                         bf_set(wqe_iod, &wqe->fcp_iread.wqe_com,
1042                                LPFC_WQE_IOD_READ);
1043                         bf_set(wqe_lenloc, &wqe->fcp_iread.wqe_com,
1044                                LPFC_WQE_LENLOC_WORD4);
1045                         if (phba->cfg_nvme_oas)
1046                                 bf_set(wqe_oas, &wqe->fcp_iread.wqe_com, 1);
1047
1048                         /* Word 11 */
1049                         bf_set(wqe_cmd_type, &wqe->generic.wqe_com,
1050                                NVME_READ_CMD);
1051
1052                         atomic_inc(&phba->fc4NvmeInputRequests);
1053                 }
1054         } else {
1055                 /* Word 4 */
1056                 wqe->fcp_icmd.rsrvd4 = 0;
1057
1058                 /* Word 7 */
1059                 bf_set(wqe_cmnd, &wqe->generic.wqe_com, CMD_FCP_ICMND64_WQE);
1060                 bf_set(wqe_pu, &wqe->generic.wqe_com, 0);
1061
1062                 /* Word 10 */
1063                 bf_set(wqe_qosd, &wqe->fcp_icmd.wqe_com, 1);
1064                 bf_set(wqe_iod, &wqe->fcp_icmd.wqe_com, LPFC_WQE_IOD_WRITE);
1065                 bf_set(wqe_lenloc, &wqe->fcp_icmd.wqe_com,
1066                        LPFC_WQE_LENLOC_NONE);
1067                 if (phba->cfg_nvme_oas)
1068                         bf_set(wqe_oas, &wqe->fcp_icmd.wqe_com, 1);
1069
1070                 /* Word 11 */
1071                 bf_set(wqe_cmd_type, &wqe->generic.wqe_com, NVME_READ_CMD);
1072
1073                 atomic_inc(&phba->fc4NvmeControlRequests);
1074         }
1075         /*
1076          * Finish initializing those WQE fields that are independent
1077          * of the nvme_cmnd request_buffer
1078          */
1079
1080         /* Word 6 */
1081         bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
1082                phba->sli4_hba.rpi_ids[pnode->nlp_rpi]);
1083         bf_set(wqe_xri_tag, &wqe->generic.wqe_com, pwqeq->sli4_xritag);
1084
1085         /* Word 7 */
1086         /* Preserve Class data in the ndlp. */
1087         bf_set(wqe_class, &wqe->generic.wqe_com,
1088                (pnode->nlp_fcp_info & 0x0f));
1089
1090         /* Word 8 */
1091         wqe->generic.wqe_com.abort_tag = pwqeq->iotag;
1092
1093         /* Word 9 */
1094         bf_set(wqe_reqtag, &wqe->generic.wqe_com, pwqeq->iotag);
1095
1096         /* Word 11 */
1097         bf_set(wqe_cqid, &wqe->generic.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
1098
1099         pwqeq->vport = vport;
1100         return 0;
1101 }
1102
1103
1104 /**
1105  * lpfc_nvme_prep_io_dma - Issue an NVME-over-FCP IO
1106  * @lpfc_pnvme: Pointer to the driver's nvme instance data
1107  * @lpfc_nvme_lport: Pointer to the driver's local port data
1108  * @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
1109  * @lpfc_nvme_fcreq: IO request from nvme fc to driver.
1110  * @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue
1111  *
1112  * Driver registers this routine as it io request handler.  This
1113  * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
1114  * data structure to the rport indicated in @lpfc_nvme_rport.
1115  *
1116  * Return value :
1117  *   0 - Success
1118  *   TODO: What are the failure codes.
1119  **/
1120 static int
1121 lpfc_nvme_prep_io_dma(struct lpfc_vport *vport,
1122                       struct lpfc_nvme_buf *lpfc_ncmd)
1123 {
1124         struct lpfc_hba *phba = vport->phba;
1125         struct nvmefc_fcp_req *nCmd = lpfc_ncmd->nvmeCmd;
1126         union lpfc_wqe128 *wqe = (union lpfc_wqe128 *)&lpfc_ncmd->cur_iocbq.wqe;
1127         struct sli4_sge *sgl = lpfc_ncmd->nvme_sgl;
1128         struct scatterlist *data_sg;
1129         struct sli4_sge *first_data_sgl;
1130         dma_addr_t physaddr;
1131         uint32_t num_bde = 0;
1132         uint32_t dma_len;
1133         uint32_t dma_offset = 0;
1134         int nseg, i;
1135
1136         /* Fix up the command and response DMA stuff. */
1137         lpfc_nvme_adj_fcp_sgls(vport, lpfc_ncmd, nCmd);
1138
1139         /*
1140          * There are three possibilities here - use scatter-gather segment, use
1141          * the single mapping, or neither.
1142          */
1143         if (nCmd->sg_cnt) {
1144                 /*
1145                  * Jump over the cmd and rsp SGEs.  The fix routine
1146                  * has already adjusted for this.
1147                  */
1148                 sgl += 2;
1149
1150                 first_data_sgl = sgl;
1151                 lpfc_ncmd->seg_cnt = nCmd->sg_cnt;
1152                 if (lpfc_ncmd->seg_cnt > phba->cfg_nvme_seg_cnt + 1) {
1153                         lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
1154                                         "6058 Too many sg segments from "
1155                                         "NVME Transport.  Max %d, "
1156                                         "nvmeIO sg_cnt %d\n",
1157                                         phba->cfg_nvme_seg_cnt + 1,
1158                                         lpfc_ncmd->seg_cnt);
1159                         lpfc_ncmd->seg_cnt = 0;
1160                         return 1;
1161                 }
1162
1163                 /*
1164                  * The driver established a maximum scatter-gather segment count
1165                  * during probe that limits the number of sg elements in any
1166                  * single nvme command.  Just run through the seg_cnt and format
1167                  * the sge's.
1168                  */
1169                 nseg = nCmd->sg_cnt;
1170                 data_sg = nCmd->first_sgl;
1171                 for (i = 0; i < nseg; i++) {
1172                         if (data_sg == NULL) {
1173                                 lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
1174                                                 "6059 dptr err %d, nseg %d\n",
1175                                                 i, nseg);
1176                                 lpfc_ncmd->seg_cnt = 0;
1177                                 return 1;
1178                         }
1179                         physaddr = data_sg->dma_address;
1180                         dma_len = data_sg->length;
1181                         sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
1182                         sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
1183                         sgl->word2 = le32_to_cpu(sgl->word2);
1184                         if ((num_bde + 1) == nseg)
1185                                 bf_set(lpfc_sli4_sge_last, sgl, 1);
1186                         else
1187                                 bf_set(lpfc_sli4_sge_last, sgl, 0);
1188                         bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
1189                         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
1190                         sgl->word2 = cpu_to_le32(sgl->word2);
1191                         sgl->sge_len = cpu_to_le32(dma_len);
1192
1193                         dma_offset += dma_len;
1194                         data_sg = sg_next(data_sg);
1195                         sgl++;
1196                 }
1197         } else {
1198                 /* For this clause to be valid, the payload_length
1199                  * and sg_cnt must zero.
1200                  */
1201                 if (nCmd->payload_length != 0) {
1202                         lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
1203                                         "6063 NVME DMA Prep Err: sg_cnt %d "
1204                                         "payload_length x%x\n",
1205                                         nCmd->sg_cnt, nCmd->payload_length);
1206                         return 1;
1207                 }
1208         }
1209
1210         /*
1211          * Due to difference in data length between DIF/non-DIF paths,
1212          * we need to set word 4 of WQE here
1213          */
1214         wqe->fcp_iread.total_xfer_len = nCmd->payload_length;
1215         return 0;
1216 }
1217
1218 /**
1219  * lpfc_nvme_fcp_io_submit - Issue an NVME-over-FCP IO
1220  * @lpfc_pnvme: Pointer to the driver's nvme instance data
1221  * @lpfc_nvme_lport: Pointer to the driver's local port data
1222  * @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
1223  * @lpfc_nvme_fcreq: IO request from nvme fc to driver.
1224  * @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue
1225  *
1226  * Driver registers this routine as it io request handler.  This
1227  * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
1228  * data structure to the rport
1229  indicated in @lpfc_nvme_rport.
1230  *
1231  * Return value :
1232  *   0 - Success
1233  *   TODO: What are the failure codes.
1234  **/
1235 static int
1236 lpfc_nvme_fcp_io_submit(struct nvme_fc_local_port *pnvme_lport,
1237                         struct nvme_fc_remote_port *pnvme_rport,
1238                         void *hw_queue_handle,
1239                         struct nvmefc_fcp_req *pnvme_fcreq)
1240 {
1241         int ret = 0;
1242         struct lpfc_nvme_lport *lport;
1243         struct lpfc_vport *vport;
1244         struct lpfc_hba *phba;
1245         struct lpfc_nodelist *ndlp;
1246         struct lpfc_nvme_buf *lpfc_ncmd;
1247         struct lpfc_nvme_rport *rport;
1248         struct lpfc_nvme_qhandle *lpfc_queue_info;
1249         struct lpfc_nvme_fcpreq_priv *freqpriv = pnvme_fcreq->private;
1250 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1251         uint64_t start = 0;
1252 #endif
1253
1254         lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
1255         vport = lport->vport;
1256         phba = vport->phba;
1257
1258         if (vport->load_flag & FC_UNLOADING) {
1259                 ret = -ENODEV;
1260                 goto out_fail;
1261         }
1262
1263         /* Validate pointers. */
1264         if (!pnvme_lport || !pnvme_rport || !freqpriv) {
1265                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR | LOG_NODE,
1266                                  "6117 No Send:IO submit ptrs NULL, lport %p, "
1267                                  "rport %p fcreq_priv %p\n",
1268                                  pnvme_lport, pnvme_rport, freqpriv);
1269                 ret = -ENODEV;
1270                 goto out_fail;
1271         }
1272
1273 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1274         if (phba->ktime_on)
1275                 start = ktime_get_ns();
1276 #endif
1277         rport = (struct lpfc_nvme_rport *)pnvme_rport->private;
1278         lpfc_queue_info = (struct lpfc_nvme_qhandle *)hw_queue_handle;
1279
1280         /*
1281          * Catch race where our node has transitioned, but the
1282          * transport is still transitioning.
1283          */
1284         ndlp = rport->ndlp;
1285         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
1286                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE | LOG_NVME_IOERR,
1287                                  "6053 rport %p, ndlp %p, DID x%06x "
1288                                  "ndlp not ready.\n",
1289                                  rport, ndlp, pnvme_rport->port_id);
1290
1291                 ndlp = lpfc_findnode_did(vport, pnvme_rport->port_id);
1292                 if (!ndlp) {
1293                         lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_IOERR,
1294                                          "6066 Missing node for DID %x\n",
1295                                          pnvme_rport->port_id);
1296                         ret = -ENODEV;
1297                         goto out_fail;
1298                 }
1299         }
1300
1301         /* The remote node has to be a mapped target or it's an error. */
1302         if ((ndlp->nlp_type & NLP_NVME_TARGET) &&
1303             (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
1304                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE | LOG_NVME_IOERR,
1305                                  "6036 rport %p, DID x%06x not ready for "
1306                                  "IO. State x%x, Type x%x\n",
1307                                  rport, pnvme_rport->port_id,
1308                                  ndlp->nlp_state, ndlp->nlp_type);
1309                 ret = -ENODEV;
1310                 goto out_fail;
1311
1312         }
1313
1314         /* The node is shared with FCP IO, make sure the IO pending count does
1315          * not exceed the programmed depth.
1316          */
1317         if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth) {
1318                 ret = -EBUSY;
1319                 goto out_fail;
1320         }
1321
1322         lpfc_ncmd = lpfc_get_nvme_buf(phba, ndlp);
1323         if (lpfc_ncmd == NULL) {
1324                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1325                                  "6065 driver's buffer pool is empty, "
1326                                  "IO failed\n");
1327                 ret = -EBUSY;
1328                 goto out_fail;
1329         }
1330 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1331         if (start) {
1332                 lpfc_ncmd->ts_cmd_start = start;
1333                 lpfc_ncmd->ts_last_cmd = phba->ktime_last_cmd;
1334         } else {
1335                 lpfc_ncmd->ts_cmd_start = 0;
1336         }
1337 #endif
1338
1339         /*
1340          * Store the data needed by the driver to issue, abort, and complete
1341          * an IO.
1342          * Do not let the IO hang out forever.  There is no midlayer issuing
1343          * an abort so inform the FW of the maximum IO pending time.
1344          */
1345         freqpriv->nvme_buf = lpfc_ncmd;
1346         lpfc_ncmd->nvmeCmd = pnvme_fcreq;
1347         lpfc_ncmd->nrport = rport;
1348         lpfc_ncmd->ndlp = ndlp;
1349         lpfc_ncmd->start_time = jiffies;
1350
1351         lpfc_nvme_prep_io_cmd(vport, lpfc_ncmd, ndlp);
1352         ret = lpfc_nvme_prep_io_dma(vport, lpfc_ncmd);
1353         if (ret) {
1354                 ret = -ENOMEM;
1355                 goto out_free_nvme_buf;
1356         }
1357
1358         atomic_inc(&ndlp->cmd_pending);
1359
1360         /*
1361          * Issue the IO on the WQ indicated by index in the hw_queue_handle.
1362          * This identfier was create in our hardware queue create callback
1363          * routine. The driver now is dependent on the IO queue steering from
1364          * the transport.  We are trusting the upper NVME layers know which
1365          * index to use and that they have affinitized a CPU to this hardware
1366          * queue. A hardware queue maps to a driver MSI-X vector/EQ/CQ/WQ.
1367          */
1368         lpfc_ncmd->cur_iocbq.hba_wqidx = lpfc_queue_info->index;
1369
1370         lpfc_nvmeio_data(phba, "NVME FCP XMIT: xri x%x idx %d to %06x\n",
1371                          lpfc_ncmd->cur_iocbq.sli4_xritag,
1372                          lpfc_queue_info->index, ndlp->nlp_DID);
1373
1374         ret = lpfc_sli4_issue_wqe(phba, LPFC_FCP_RING, &lpfc_ncmd->cur_iocbq);
1375         if (ret) {
1376                 atomic_dec(&ndlp->cmd_pending);
1377                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1378                                  "6113 FCP could not issue WQE err %x "
1379                                  "sid: x%x did: x%x oxid: x%x\n",
1380                                  ret, vport->fc_myDID, ndlp->nlp_DID,
1381                                  lpfc_ncmd->cur_iocbq.sli4_xritag);
1382                 goto out_free_nvme_buf;
1383         }
1384
1385 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1386         if (lpfc_ncmd->ts_cmd_start)
1387                 lpfc_ncmd->ts_cmd_wqput = ktime_get_ns();
1388
1389         if (phba->cpucheck_on & LPFC_CHECK_NVME_IO) {
1390                 lpfc_ncmd->cpu = smp_processor_id();
1391                 if (lpfc_ncmd->cpu != lpfc_queue_info->index) {
1392                         /* Check for admin queue */
1393                         if (lpfc_queue_info->qidx) {
1394                                 lpfc_printf_vlog(vport,
1395                                                  KERN_ERR, LOG_NVME_IOERR,
1396                                                 "6702 CPU Check cmd: "
1397                                                 "cpu %d wq %d\n",
1398                                                 lpfc_ncmd->cpu,
1399                                                 lpfc_queue_info->index);
1400                         }
1401                         lpfc_ncmd->cpu = lpfc_queue_info->index;
1402                 }
1403                 if (lpfc_ncmd->cpu < LPFC_CHECK_CPU_CNT)
1404                         phba->cpucheck_xmt_io[lpfc_ncmd->cpu]++;
1405         }
1406 #endif
1407         return 0;
1408
1409  out_free_nvme_buf:
1410         if (lpfc_ncmd->nvmeCmd->sg_cnt) {
1411                 if (lpfc_ncmd->nvmeCmd->io_dir == NVMEFC_FCP_WRITE)
1412                         atomic_dec(&phba->fc4NvmeOutputRequests);
1413                 else
1414                         atomic_dec(&phba->fc4NvmeInputRequests);
1415         } else
1416                 atomic_dec(&phba->fc4NvmeControlRequests);
1417         lpfc_release_nvme_buf(phba, lpfc_ncmd);
1418  out_fail:
1419         return ret;
1420 }
1421
1422 /**
1423  * lpfc_nvme_abort_fcreq_cmpl - Complete an NVME FCP abort request.
1424  * @phba: Pointer to HBA context object
1425  * @cmdiocb: Pointer to command iocb object.
1426  * @rspiocb: Pointer to response iocb object.
1427  *
1428  * This is the callback function for any NVME FCP IO that was aborted.
1429  *
1430  * Return value:
1431  *   None
1432  **/
1433 void
1434 lpfc_nvme_abort_fcreq_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
1435                            struct lpfc_wcqe_complete *abts_cmpl)
1436 {
1437         lpfc_printf_log(phba, KERN_INFO, LOG_NVME,
1438                         "6145 ABORT_XRI_CN completing on rpi x%x "
1439                         "original iotag x%x, abort cmd iotag x%x "
1440                         "req_tag x%x, status x%x, hwstatus x%x\n",
1441                         cmdiocb->iocb.un.acxri.abortContextTag,
1442                         cmdiocb->iocb.un.acxri.abortIoTag,
1443                         cmdiocb->iotag,
1444                         bf_get(lpfc_wcqe_c_request_tag, abts_cmpl),
1445                         bf_get(lpfc_wcqe_c_status, abts_cmpl),
1446                         bf_get(lpfc_wcqe_c_hw_status, abts_cmpl));
1447         lpfc_sli_release_iocbq(phba, cmdiocb);
1448 }
1449
1450 /**
1451  * lpfc_nvme_fcp_abort - Issue an NVME-over-FCP ABTS
1452  * @lpfc_pnvme: Pointer to the driver's nvme instance data
1453  * @lpfc_nvme_lport: Pointer to the driver's local port data
1454  * @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
1455  * @lpfc_nvme_fcreq: IO request from nvme fc to driver.
1456  * @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue
1457  *
1458  * Driver registers this routine as its nvme request io abort handler.  This
1459  * routine issues an fcp Abort WQE with data from the @lpfc_nvme_fcpreq
1460  * data structure to the rport indicated in @lpfc_nvme_rport.  This routine
1461  * is executed asynchronously - one the target is validated as "MAPPED" and
1462  * ready for IO, the driver issues the abort request and returns.
1463  *
1464  * Return value:
1465  *   None
1466  **/
1467 static void
1468 lpfc_nvme_fcp_abort(struct nvme_fc_local_port *pnvme_lport,
1469                     struct nvme_fc_remote_port *pnvme_rport,
1470                     void *hw_queue_handle,
1471                     struct nvmefc_fcp_req *pnvme_fcreq)
1472 {
1473         struct lpfc_nvme_lport *lport;
1474         struct lpfc_vport *vport;
1475         struct lpfc_hba *phba;
1476         struct lpfc_nvme_rport *rport;
1477         struct lpfc_nvme_buf *lpfc_nbuf;
1478         struct lpfc_iocbq *abts_buf;
1479         struct lpfc_iocbq *nvmereq_wqe;
1480         struct lpfc_nvme_fcpreq_priv *freqpriv = pnvme_fcreq->private;
1481         union lpfc_wqe *abts_wqe;
1482         unsigned long flags;
1483         int ret_val;
1484
1485         lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
1486         rport = (struct lpfc_nvme_rport *)pnvme_rport->private;
1487         vport = lport->vport;
1488         phba = vport->phba;
1489
1490         /* Announce entry to new IO submit field. */
1491         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS,
1492                          "6002 Abort Request to rport DID x%06x "
1493                          "for nvme_fc_req %p\n",
1494                          pnvme_rport->port_id,
1495                          pnvme_fcreq);
1496
1497         /* If the hba is getting reset, this flag is set.  It is
1498          * cleared when the reset is complete and rings reestablished.
1499          */
1500         spin_lock_irqsave(&phba->hbalock, flags);
1501         /* driver queued commands are in process of being flushed */
1502         if (phba->hba_flag & HBA_NVME_IOQ_FLUSH) {
1503                 spin_unlock_irqrestore(&phba->hbalock, flags);
1504                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
1505                                  "6139 Driver in reset cleanup - flushing "
1506                                  "NVME Req now.  hba_flag x%x\n",
1507                                  phba->hba_flag);
1508                 return;
1509         }
1510
1511         lpfc_nbuf = freqpriv->nvme_buf;
1512         if (!lpfc_nbuf) {
1513                 spin_unlock_irqrestore(&phba->hbalock, flags);
1514                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
1515                                  "6140 NVME IO req has no matching lpfc nvme "
1516                                  "io buffer.  Skipping abort req.\n");
1517                 return;
1518         } else if (!lpfc_nbuf->nvmeCmd) {
1519                 spin_unlock_irqrestore(&phba->hbalock, flags);
1520                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
1521                                  "6141 lpfc NVME IO req has no nvme_fcreq "
1522                                  "io buffer.  Skipping abort req.\n");
1523                 return;
1524         }
1525         nvmereq_wqe = &lpfc_nbuf->cur_iocbq;
1526
1527         /*
1528          * The lpfc_nbuf and the mapped nvme_fcreq in the driver's
1529          * state must match the nvme_fcreq passed by the nvme
1530          * transport.  If they don't match, it is likely the driver
1531          * has already completed the NVME IO and the nvme transport
1532          * has not seen it yet.
1533          */
1534         if (lpfc_nbuf->nvmeCmd != pnvme_fcreq) {
1535                 spin_unlock_irqrestore(&phba->hbalock, flags);
1536                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
1537                                  "6143 NVME req mismatch: "
1538                                  "lpfc_nbuf %p nvmeCmd %p, "
1539                                  "pnvme_fcreq %p.  Skipping Abort xri x%x\n",
1540                                  lpfc_nbuf, lpfc_nbuf->nvmeCmd,
1541                                  pnvme_fcreq, nvmereq_wqe->sli4_xritag);
1542                 return;
1543         }
1544
1545         /* Don't abort IOs no longer on the pending queue. */
1546         if (!(nvmereq_wqe->iocb_flag & LPFC_IO_ON_TXCMPLQ)) {
1547                 spin_unlock_irqrestore(&phba->hbalock, flags);
1548                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
1549                                  "6142 NVME IO req %p not queued - skipping "
1550                                  "abort req xri x%x\n",
1551                                  pnvme_fcreq, nvmereq_wqe->sli4_xritag);
1552                 return;
1553         }
1554
1555         lpfc_nvmeio_data(phba, "NVME FCP ABORT: xri x%x idx %d to %06x\n",
1556                          nvmereq_wqe->sli4_xritag,
1557                          nvmereq_wqe->hba_wqidx, pnvme_rport->port_id);
1558
1559         /* Outstanding abort is in progress */
1560         if (nvmereq_wqe->iocb_flag & LPFC_DRIVER_ABORTED) {
1561                 spin_unlock_irqrestore(&phba->hbalock, flags);
1562                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
1563                                  "6144 Outstanding NVME I/O Abort Request "
1564                                  "still pending on nvme_fcreq %p, "
1565                                  "lpfc_ncmd %p xri x%x\n",
1566                                  pnvme_fcreq, lpfc_nbuf,
1567                                  nvmereq_wqe->sli4_xritag);
1568                 return;
1569         }
1570
1571         abts_buf = __lpfc_sli_get_iocbq(phba);
1572         if (!abts_buf) {
1573                 spin_unlock_irqrestore(&phba->hbalock, flags);
1574                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
1575                                  "6136 No available abort wqes. Skipping "
1576                                  "Abts req for nvme_fcreq %p xri x%x\n",
1577                                  pnvme_fcreq, nvmereq_wqe->sli4_xritag);
1578                 return;
1579         }
1580
1581         /* Ready - mark outstanding as aborted by driver. */
1582         nvmereq_wqe->iocb_flag |= LPFC_DRIVER_ABORTED;
1583
1584         /* Complete prepping the abort wqe and issue to the FW. */
1585         abts_wqe = &abts_buf->wqe;
1586
1587         /* WQEs are reused.  Clear stale data and set key fields to
1588          * zero like ia, iaab, iaar, xri_tag, and ctxt_tag.
1589          */
1590         memset(abts_wqe, 0, sizeof(union lpfc_wqe));
1591         bf_set(abort_cmd_criteria, &abts_wqe->abort_cmd, T_XRI_TAG);
1592
1593         /* word 7 */
1594         bf_set(wqe_ct, &abts_wqe->abort_cmd.wqe_com, 0);
1595         bf_set(wqe_cmnd, &abts_wqe->abort_cmd.wqe_com, CMD_ABORT_XRI_CX);
1596         bf_set(wqe_class, &abts_wqe->abort_cmd.wqe_com,
1597                nvmereq_wqe->iocb.ulpClass);
1598
1599         /* word 8 - tell the FW to abort the IO associated with this
1600          * outstanding exchange ID.
1601          */
1602         abts_wqe->abort_cmd.wqe_com.abort_tag = nvmereq_wqe->sli4_xritag;
1603
1604         /* word 9 - this is the iotag for the abts_wqe completion. */
1605         bf_set(wqe_reqtag, &abts_wqe->abort_cmd.wqe_com,
1606                abts_buf->iotag);
1607
1608         /* word 10 */
1609         bf_set(wqe_wqid, &abts_wqe->abort_cmd.wqe_com, nvmereq_wqe->hba_wqidx);
1610         bf_set(wqe_qosd, &abts_wqe->abort_cmd.wqe_com, 1);
1611         bf_set(wqe_lenloc, &abts_wqe->abort_cmd.wqe_com, LPFC_WQE_LENLOC_NONE);
1612
1613         /* word 11 */
1614         bf_set(wqe_cmd_type, &abts_wqe->abort_cmd.wqe_com, OTHER_COMMAND);
1615         bf_set(wqe_wqec, &abts_wqe->abort_cmd.wqe_com, 1);
1616         bf_set(wqe_cqid, &abts_wqe->abort_cmd.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
1617
1618         /* ABTS WQE must go to the same WQ as the WQE to be aborted */
1619         abts_buf->iocb_flag |= LPFC_IO_NVME;
1620         abts_buf->hba_wqidx = nvmereq_wqe->hba_wqidx;
1621         abts_buf->vport = vport;
1622         abts_buf->wqe_cmpl = lpfc_nvme_abort_fcreq_cmpl;
1623         ret_val = lpfc_sli4_issue_wqe(phba, LPFC_FCP_RING, abts_buf);
1624         spin_unlock_irqrestore(&phba->hbalock, flags);
1625         if (ret_val) {
1626                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
1627                                  "6137 Failed abts issue_wqe with status x%x "
1628                                  "for nvme_fcreq %p.\n",
1629                                  ret_val, pnvme_fcreq);
1630                 lpfc_sli_release_iocbq(phba, abts_buf);
1631                 return;
1632         }
1633
1634         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS,
1635                          "6138 Transport Abort NVME Request Issued for "
1636                          "ox_id x%x on reqtag x%x\n",
1637                          nvmereq_wqe->sli4_xritag,
1638                          abts_buf->iotag);
1639 }
1640
1641 /* Declare and initialization an instance of the FC NVME template. */
1642 static struct nvme_fc_port_template lpfc_nvme_template = {
1643         /* initiator-based functions */
1644         .localport_delete  = lpfc_nvme_localport_delete,
1645         .remoteport_delete = lpfc_nvme_remoteport_delete,
1646         .create_queue = lpfc_nvme_create_queue,
1647         .delete_queue = lpfc_nvme_delete_queue,
1648         .ls_req       = lpfc_nvme_ls_req,
1649         .fcp_io       = lpfc_nvme_fcp_io_submit,
1650         .ls_abort     = lpfc_nvme_ls_abort,
1651         .fcp_abort    = lpfc_nvme_fcp_abort,
1652
1653         .max_hw_queues = 1,
1654         .max_sgl_segments = LPFC_NVME_DEFAULT_SEGS,
1655         .max_dif_sgl_segments = LPFC_NVME_DEFAULT_SEGS,
1656         .dma_boundary = 0xFFFFFFFF,
1657
1658         /* Sizes of additional private data for data structures.
1659          * No use for the last two sizes at this time.
1660          */
1661         .local_priv_sz = sizeof(struct lpfc_nvme_lport),
1662         .remote_priv_sz = sizeof(struct lpfc_nvme_rport),
1663         .lsrqst_priv_sz = 0,
1664         .fcprqst_priv_sz = sizeof(struct lpfc_nvme_fcpreq_priv),
1665 };
1666
1667 /**
1668  * lpfc_sli4_post_nvme_sgl_block - post a block of nvme sgl list to firmware
1669  * @phba: pointer to lpfc hba data structure.
1670  * @nblist: pointer to nvme buffer list.
1671  * @count: number of scsi buffers on the list.
1672  *
1673  * This routine is invoked to post a block of @count scsi sgl pages from a
1674  * SCSI buffer list @nblist to the HBA using non-embedded mailbox command.
1675  * No Lock is held.
1676  *
1677  **/
1678 static int
1679 lpfc_sli4_post_nvme_sgl_block(struct lpfc_hba *phba,
1680                               struct list_head *nblist,
1681                               int count)
1682 {
1683         struct lpfc_nvme_buf *lpfc_ncmd;
1684         struct lpfc_mbx_post_uembed_sgl_page1 *sgl;
1685         struct sgl_page_pairs *sgl_pg_pairs;
1686         void *viraddr;
1687         LPFC_MBOXQ_t *mbox;
1688         uint32_t reqlen, alloclen, pg_pairs;
1689         uint32_t mbox_tmo;
1690         uint16_t xritag_start = 0;
1691         int rc = 0;
1692         uint32_t shdr_status, shdr_add_status;
1693         dma_addr_t pdma_phys_bpl1;
1694         union lpfc_sli4_cfg_shdr *shdr;
1695
1696         /* Calculate the requested length of the dma memory */
1697         reqlen = count * sizeof(struct sgl_page_pairs) +
1698                  sizeof(union lpfc_sli4_cfg_shdr) + sizeof(uint32_t);
1699         if (reqlen > SLI4_PAGE_SIZE) {
1700                 lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
1701                                 "6118 Block sgl registration required DMA "
1702                                 "size (%d) great than a page\n", reqlen);
1703                 return -ENOMEM;
1704         }
1705         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
1706         if (!mbox) {
1707                 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
1708                                 "6119 Failed to allocate mbox cmd memory\n");
1709                 return -ENOMEM;
1710         }
1711
1712         /* Allocate DMA memory and set up the non-embedded mailbox command */
1713         alloclen = lpfc_sli4_config(phba, mbox, LPFC_MBOX_SUBSYSTEM_FCOE,
1714                                 LPFC_MBOX_OPCODE_FCOE_POST_SGL_PAGES, reqlen,
1715                                 LPFC_SLI4_MBX_NEMBED);
1716
1717         if (alloclen < reqlen) {
1718                 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
1719                                 "6120 Allocated DMA memory size (%d) is "
1720                                 "less than the requested DMA memory "
1721                                 "size (%d)\n", alloclen, reqlen);
1722                 lpfc_sli4_mbox_cmd_free(phba, mbox);
1723                 return -ENOMEM;
1724         }
1725
1726         /* Get the first SGE entry from the non-embedded DMA memory */
1727         viraddr = mbox->sge_array->addr[0];
1728
1729         /* Set up the SGL pages in the non-embedded DMA pages */
1730         sgl = (struct lpfc_mbx_post_uembed_sgl_page1 *)viraddr;
1731         sgl_pg_pairs = &sgl->sgl_pg_pairs;
1732
1733         pg_pairs = 0;
1734         list_for_each_entry(lpfc_ncmd, nblist, list) {
1735                 /* Set up the sge entry */
1736                 sgl_pg_pairs->sgl_pg0_addr_lo =
1737                         cpu_to_le32(putPaddrLow(lpfc_ncmd->dma_phys_sgl));
1738                 sgl_pg_pairs->sgl_pg0_addr_hi =
1739                         cpu_to_le32(putPaddrHigh(lpfc_ncmd->dma_phys_sgl));
1740                 if (phba->cfg_sg_dma_buf_size > SGL_PAGE_SIZE)
1741                         pdma_phys_bpl1 = lpfc_ncmd->dma_phys_sgl +
1742                                                 SGL_PAGE_SIZE;
1743                 else
1744                         pdma_phys_bpl1 = 0;
1745                 sgl_pg_pairs->sgl_pg1_addr_lo =
1746                         cpu_to_le32(putPaddrLow(pdma_phys_bpl1));
1747                 sgl_pg_pairs->sgl_pg1_addr_hi =
1748                         cpu_to_le32(putPaddrHigh(pdma_phys_bpl1));
1749                 /* Keep the first xritag on the list */
1750                 if (pg_pairs == 0)
1751                         xritag_start = lpfc_ncmd->cur_iocbq.sli4_xritag;
1752                 sgl_pg_pairs++;
1753                 pg_pairs++;
1754         }
1755         bf_set(lpfc_post_sgl_pages_xri, sgl, xritag_start);
1756         bf_set(lpfc_post_sgl_pages_xricnt, sgl, pg_pairs);
1757         /* Perform endian conversion if necessary */
1758         sgl->word0 = cpu_to_le32(sgl->word0);
1759
1760         if (!phba->sli4_hba.intr_enable)
1761                 rc = lpfc_sli_issue_mbox(phba, mbox, MBX_POLL);
1762         else {
1763                 mbox_tmo = lpfc_mbox_tmo_val(phba, mbox);
1764                 rc = lpfc_sli_issue_mbox_wait(phba, mbox, mbox_tmo);
1765         }
1766         shdr = (union lpfc_sli4_cfg_shdr *)&sgl->cfg_shdr;
1767         shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
1768         shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);
1769         if (rc != MBX_TIMEOUT)
1770                 lpfc_sli4_mbox_cmd_free(phba, mbox);
1771         if (shdr_status || shdr_add_status || rc) {
1772                 lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
1773                                 "6125 POST_SGL_BLOCK mailbox command failed "
1774                                 "status x%x add_status x%x mbx status x%x\n",
1775                                 shdr_status, shdr_add_status, rc);
1776                 rc = -ENXIO;
1777         }
1778         return rc;
1779 }
1780
1781 /**
1782  * lpfc_post_nvme_sgl_list - Post blocks of nvme buffer sgls from a list
1783  * @phba: pointer to lpfc hba data structure.
1784  * @post_nblist: pointer to the nvme buffer list.
1785  *
1786  * This routine walks a list of nvme buffers that was passed in. It attempts
1787  * to construct blocks of nvme buffer sgls which contains contiguous xris and
1788  * uses the non-embedded SGL block post mailbox commands to post to the port.
1789  * For single NVME buffer sgl with non-contiguous xri, if any, it shall use
1790  * embedded SGL post mailbox command for posting. The @post_nblist passed in
1791  * must be local list, thus no lock is needed when manipulate the list.
1792  *
1793  * Returns: 0 = failure, non-zero number of successfully posted buffers.
1794  **/
1795 static int
1796 lpfc_post_nvme_sgl_list(struct lpfc_hba *phba,
1797                              struct list_head *post_nblist, int sb_count)
1798 {
1799         struct lpfc_nvme_buf *lpfc_ncmd, *lpfc_ncmd_next;
1800         int status, sgl_size;
1801         int post_cnt = 0, block_cnt = 0, num_posting = 0, num_posted = 0;
1802         dma_addr_t pdma_phys_sgl1;
1803         int last_xritag = NO_XRI;
1804         int cur_xritag;
1805         LIST_HEAD(prep_nblist);
1806         LIST_HEAD(blck_nblist);
1807         LIST_HEAD(nvme_nblist);
1808
1809         /* sanity check */
1810         if (sb_count <= 0)
1811                 return -EINVAL;
1812
1813         sgl_size = phba->cfg_sg_dma_buf_size;
1814
1815         list_for_each_entry_safe(lpfc_ncmd, lpfc_ncmd_next, post_nblist, list) {
1816                 list_del_init(&lpfc_ncmd->list);
1817                 block_cnt++;
1818                 if ((last_xritag != NO_XRI) &&
1819                     (lpfc_ncmd->cur_iocbq.sli4_xritag != last_xritag + 1)) {
1820                         /* a hole in xri block, form a sgl posting block */
1821                         list_splice_init(&prep_nblist, &blck_nblist);
1822                         post_cnt = block_cnt - 1;
1823                         /* prepare list for next posting block */
1824                         list_add_tail(&lpfc_ncmd->list, &prep_nblist);
1825                         block_cnt = 1;
1826                 } else {
1827                         /* prepare list for next posting block */
1828                         list_add_tail(&lpfc_ncmd->list, &prep_nblist);
1829                         /* enough sgls for non-embed sgl mbox command */
1830                         if (block_cnt == LPFC_NEMBED_MBOX_SGL_CNT) {
1831                                 list_splice_init(&prep_nblist, &blck_nblist);
1832                                 post_cnt = block_cnt;
1833                                 block_cnt = 0;
1834                         }
1835                 }
1836                 num_posting++;
1837                 last_xritag = lpfc_ncmd->cur_iocbq.sli4_xritag;
1838
1839                 /* end of repost sgl list condition for NVME buffers */
1840                 if (num_posting == sb_count) {
1841                         if (post_cnt == 0) {
1842                                 /* last sgl posting block */
1843                                 list_splice_init(&prep_nblist, &blck_nblist);
1844                                 post_cnt = block_cnt;
1845                         } else if (block_cnt == 1) {
1846                                 /* last single sgl with non-contiguous xri */
1847                                 if (sgl_size > SGL_PAGE_SIZE)
1848                                         pdma_phys_sgl1 =
1849                                                 lpfc_ncmd->dma_phys_sgl +
1850                                                 SGL_PAGE_SIZE;
1851                                 else
1852                                         pdma_phys_sgl1 = 0;
1853                                 cur_xritag = lpfc_ncmd->cur_iocbq.sli4_xritag;
1854                                 status = lpfc_sli4_post_sgl(phba,
1855                                                 lpfc_ncmd->dma_phys_sgl,
1856                                                 pdma_phys_sgl1, cur_xritag);
1857                                 if (status) {
1858                                         /* failure, put on abort nvme list */
1859                                         lpfc_ncmd->flags |= LPFC_SBUF_XBUSY;
1860                                 } else {
1861                                         /* success, put on NVME buffer list */
1862                                         lpfc_ncmd->flags &= ~LPFC_SBUF_XBUSY;
1863                                         lpfc_ncmd->status = IOSTAT_SUCCESS;
1864                                         num_posted++;
1865                                 }
1866                                 /* success, put on NVME buffer sgl list */
1867                                 list_add_tail(&lpfc_ncmd->list, &nvme_nblist);
1868                         }
1869                 }
1870
1871                 /* continue until a nembed page worth of sgls */
1872                 if (post_cnt == 0)
1873                         continue;
1874
1875                 /* post block of NVME buffer list sgls */
1876                 status = lpfc_sli4_post_nvme_sgl_block(phba, &blck_nblist,
1877                                                        post_cnt);
1878
1879                 /* don't reset xirtag due to hole in xri block */
1880                 if (block_cnt == 0)
1881                         last_xritag = NO_XRI;
1882
1883                 /* reset NVME buffer post count for next round of posting */
1884                 post_cnt = 0;
1885
1886                 /* put posted NVME buffer-sgl posted on NVME buffer sgl list */
1887                 while (!list_empty(&blck_nblist)) {
1888                         list_remove_head(&blck_nblist, lpfc_ncmd,
1889                                          struct lpfc_nvme_buf, list);
1890                         if (status) {
1891                                 /* failure, put on abort nvme list */
1892                                 lpfc_ncmd->flags |= LPFC_SBUF_XBUSY;
1893                         } else {
1894                                 /* success, put on NVME buffer list */
1895                                 lpfc_ncmd->flags &= ~LPFC_SBUF_XBUSY;
1896                                 lpfc_ncmd->status = IOSTAT_SUCCESS;
1897                                 num_posted++;
1898                         }
1899                         list_add_tail(&lpfc_ncmd->list, &nvme_nblist);
1900                 }
1901         }
1902         /* Push NVME buffers with sgl posted to the available list */
1903         while (!list_empty(&nvme_nblist)) {
1904                 list_remove_head(&nvme_nblist, lpfc_ncmd,
1905                                  struct lpfc_nvme_buf, list);
1906                 lpfc_release_nvme_buf(phba, lpfc_ncmd);
1907         }
1908         return num_posted;
1909 }
1910
1911 /**
1912  * lpfc_repost_nvme_sgl_list - Repost all the allocated nvme buffer sgls
1913  * @phba: pointer to lpfc hba data structure.
1914  *
1915  * This routine walks the list of nvme buffers that have been allocated and
1916  * repost them to the port by using SGL block post. This is needed after a
1917  * pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine
1918  * is responsible for moving all nvme buffers on the lpfc_abts_nvme_sgl_list
1919  * to the lpfc_nvme_buf_list. If the repost fails, reject all nvme buffers.
1920  *
1921  * Returns: 0 = success, non-zero failure.
1922  **/
1923 int
1924 lpfc_repost_nvme_sgl_list(struct lpfc_hba *phba)
1925 {
1926         LIST_HEAD(post_nblist);
1927         int num_posted, rc = 0;
1928
1929         /* get all NVME buffers need to repost to a local list */
1930         spin_lock_irq(&phba->nvme_buf_list_get_lock);
1931         spin_lock(&phba->nvme_buf_list_put_lock);
1932         list_splice_init(&phba->lpfc_nvme_buf_list_get, &post_nblist);
1933         list_splice(&phba->lpfc_nvme_buf_list_put, &post_nblist);
1934         spin_unlock(&phba->nvme_buf_list_put_lock);
1935         spin_unlock_irq(&phba->nvme_buf_list_get_lock);
1936
1937         /* post the list of nvme buffer sgls to port if available */
1938         if (!list_empty(&post_nblist)) {
1939                 num_posted = lpfc_post_nvme_sgl_list(phba, &post_nblist,
1940                                                 phba->sli4_hba.nvme_xri_cnt);
1941                 /* failed to post any nvme buffer, return error */
1942                 if (num_posted == 0)
1943                         rc = -EIO;
1944         }
1945         return rc;
1946 }
1947
1948 /**
1949  * lpfc_new_nvme_buf - Scsi buffer allocator for HBA with SLI4 IF spec
1950  * @vport: The virtual port for which this call being executed.
1951  * @num_to_allocate: The requested number of buffers to allocate.
1952  *
1953  * This routine allocates nvme buffers for device with SLI-4 interface spec,
1954  * the nvme buffer contains all the necessary information needed to initiate
1955  * a NVME I/O. After allocating up to @num_to_allocate NVME buffers and put
1956  * them on a list, it post them to the port by using SGL block post.
1957  *
1958  * Return codes:
1959  *   int - number of nvme buffers that were allocated and posted.
1960  *   0 = failure, less than num_to_alloc is a partial failure.
1961  **/
1962 static int
1963 lpfc_new_nvme_buf(struct lpfc_vport *vport, int num_to_alloc)
1964 {
1965         struct lpfc_hba *phba = vport->phba;
1966         struct lpfc_nvme_buf *lpfc_ncmd;
1967         struct lpfc_iocbq *pwqeq;
1968         union lpfc_wqe128 *wqe;
1969         struct sli4_sge *sgl;
1970         dma_addr_t pdma_phys_sgl;
1971         uint16_t iotag, lxri = 0;
1972         int bcnt, num_posted, sgl_size;
1973         LIST_HEAD(prep_nblist);
1974         LIST_HEAD(post_nblist);
1975         LIST_HEAD(nvme_nblist);
1976
1977         sgl_size = phba->cfg_sg_dma_buf_size;
1978
1979         for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
1980                 lpfc_ncmd = kzalloc(sizeof(struct lpfc_nvme_buf), GFP_KERNEL);
1981                 if (!lpfc_ncmd)
1982                         break;
1983                 /*
1984                  * Get memory from the pci pool to map the virt space to
1985                  * pci bus space for an I/O. The DMA buffer includes the
1986                  * number of SGE's necessary to support the sg_tablesize.
1987                  */
1988                 lpfc_ncmd->data = dma_pool_zalloc(phba->lpfc_sg_dma_buf_pool,
1989                                                   GFP_KERNEL,
1990                                                   &lpfc_ncmd->dma_handle);
1991                 if (!lpfc_ncmd->data) {
1992                         kfree(lpfc_ncmd);
1993                         break;
1994                 }
1995
1996                 lxri = lpfc_sli4_next_xritag(phba);
1997                 if (lxri == NO_XRI) {
1998                         dma_pool_free(phba->lpfc_sg_dma_buf_pool,
1999                                       lpfc_ncmd->data, lpfc_ncmd->dma_handle);
2000                         kfree(lpfc_ncmd);
2001                         break;
2002                 }
2003                 pwqeq = &(lpfc_ncmd->cur_iocbq);
2004                 wqe = (union lpfc_wqe128 *)&pwqeq->wqe;
2005
2006                 /* Allocate iotag for lpfc_ncmd->cur_iocbq. */
2007                 iotag = lpfc_sli_next_iotag(phba, pwqeq);
2008                 if (iotag == 0) {
2009                         dma_pool_free(phba->lpfc_sg_dma_buf_pool,
2010                                       lpfc_ncmd->data, lpfc_ncmd->dma_handle);
2011                         kfree(lpfc_ncmd);
2012                         lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
2013                                         "6121 Failed to allocated IOTAG for"
2014                                         " XRI:0x%x\n", lxri);
2015                         lpfc_sli4_free_xri(phba, lxri);
2016                         break;
2017                 }
2018                 pwqeq->sli4_lxritag = lxri;
2019                 pwqeq->sli4_xritag = phba->sli4_hba.xri_ids[lxri];
2020                 pwqeq->iocb_flag |= LPFC_IO_NVME;
2021                 pwqeq->context1 = lpfc_ncmd;
2022                 pwqeq->wqe_cmpl = lpfc_nvme_io_cmd_wqe_cmpl;
2023
2024                 /* Initialize local short-hand pointers. */
2025                 lpfc_ncmd->nvme_sgl = lpfc_ncmd->data;
2026                 sgl = lpfc_ncmd->nvme_sgl;
2027                 pdma_phys_sgl = lpfc_ncmd->dma_handle;
2028                 lpfc_ncmd->dma_phys_sgl = pdma_phys_sgl;
2029
2030                 /* Rsp SGE will be filled in when we rcv an IO
2031                  * from the NVME Layer to be sent.
2032                  * The cmd is going to be embedded so we need a SKIP SGE.
2033                  */
2034                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2035                 bf_set(lpfc_sli4_sge_last, sgl, 0);
2036                 sgl->word2 = cpu_to_le32(sgl->word2);
2037                 /* Fill in word 3 / sgl_len during cmd submission */
2038
2039                 lpfc_ncmd->cur_iocbq.context1 = lpfc_ncmd;
2040
2041                 /* Word 7 */
2042                 bf_set(wqe_erp, &wqe->generic.wqe_com, 0);
2043                 /* NVME upper layers will time things out, if needed */
2044                 bf_set(wqe_tmo, &wqe->generic.wqe_com, 0);
2045
2046                 /* Word 10 */
2047                 bf_set(wqe_ebde_cnt, &wqe->generic.wqe_com, 0);
2048                 bf_set(wqe_dbde, &wqe->generic.wqe_com, 1);
2049
2050                 /* add the nvme buffer to a post list */
2051                 list_add_tail(&lpfc_ncmd->list, &post_nblist);
2052                 spin_lock_irq(&phba->nvme_buf_list_get_lock);
2053                 phba->sli4_hba.nvme_xri_cnt++;
2054                 spin_unlock_irq(&phba->nvme_buf_list_get_lock);
2055         }
2056         lpfc_printf_log(phba, KERN_INFO, LOG_NVME,
2057                         "6114 Allocate %d out of %d requested new NVME "
2058                         "buffers\n", bcnt, num_to_alloc);
2059
2060         /* post the list of nvme buffer sgls to port if available */
2061         if (!list_empty(&post_nblist))
2062                 num_posted = lpfc_post_nvme_sgl_list(phba,
2063                                                      &post_nblist, bcnt);
2064         else
2065                 num_posted = 0;
2066
2067         return num_posted;
2068 }
2069
2070 /**
2071  * lpfc_get_nvme_buf - Get a nvme buffer from lpfc_nvme_buf_list of the HBA
2072  * @phba: The HBA for which this call is being executed.
2073  *
2074  * This routine removes a nvme buffer from head of @phba lpfc_nvme_buf_list list
2075  * and returns to caller.
2076  *
2077  * Return codes:
2078  *   NULL - Error
2079  *   Pointer to lpfc_nvme_buf - Success
2080  **/
2081 static struct lpfc_nvme_buf *
2082 lpfc_get_nvme_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
2083 {
2084         struct lpfc_nvme_buf *lpfc_ncmd, *lpfc_ncmd_next;
2085         unsigned long iflag = 0;
2086         int found = 0;
2087
2088         spin_lock_irqsave(&phba->nvme_buf_list_get_lock, iflag);
2089         list_for_each_entry_safe(lpfc_ncmd, lpfc_ncmd_next,
2090                                  &phba->lpfc_nvme_buf_list_get, list) {
2091                 list_del_init(&lpfc_ncmd->list);
2092                 found = 1;
2093                 break;
2094         }
2095         if (!found) {
2096                 spin_lock(&phba->nvme_buf_list_put_lock);
2097                 list_splice(&phba->lpfc_nvme_buf_list_put,
2098                             &phba->lpfc_nvme_buf_list_get);
2099                 INIT_LIST_HEAD(&phba->lpfc_nvme_buf_list_put);
2100                 spin_unlock(&phba->nvme_buf_list_put_lock);
2101                 list_for_each_entry_safe(lpfc_ncmd, lpfc_ncmd_next,
2102                                          &phba->lpfc_nvme_buf_list_get, list) {
2103                         list_del_init(&lpfc_ncmd->list);
2104                         found = 1;
2105                         break;
2106                 }
2107         }
2108         spin_unlock_irqrestore(&phba->nvme_buf_list_get_lock, iflag);
2109         if (!found)
2110                 return NULL;
2111         return  lpfc_ncmd;
2112 }
2113
2114 /**
2115  * lpfc_release_nvme_buf: Return a nvme buffer back to hba nvme buf list.
2116  * @phba: The Hba for which this call is being executed.
2117  * @lpfc_ncmd: The nvme buffer which is being released.
2118  *
2119  * This routine releases @lpfc_ncmd nvme buffer by adding it to tail of @phba
2120  * lpfc_nvme_buf_list list. For SLI4 XRI's are tied to the nvme buffer
2121  * and cannot be reused for at least RA_TOV amount of time if it was
2122  * aborted.
2123  **/
2124 static void
2125 lpfc_release_nvme_buf(struct lpfc_hba *phba, struct lpfc_nvme_buf *lpfc_ncmd)
2126 {
2127         unsigned long iflag = 0;
2128
2129         lpfc_ncmd->nonsg_phys = 0;
2130         if (lpfc_ncmd->flags & LPFC_SBUF_XBUSY) {
2131                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
2132                                 "6310 XB release deferred for "
2133                                 "ox_id x%x on reqtag x%x\n",
2134                                 lpfc_ncmd->cur_iocbq.sli4_xritag,
2135                                 lpfc_ncmd->cur_iocbq.iotag);
2136
2137                 spin_lock_irqsave(&phba->sli4_hba.abts_nvme_buf_list_lock,
2138                                         iflag);
2139                 list_add_tail(&lpfc_ncmd->list,
2140                         &phba->sli4_hba.lpfc_abts_nvme_buf_list);
2141                 spin_unlock_irqrestore(&phba->sli4_hba.abts_nvme_buf_list_lock,
2142                                         iflag);
2143         } else {
2144                 lpfc_ncmd->nvmeCmd = NULL;
2145                 lpfc_ncmd->cur_iocbq.iocb_flag = LPFC_IO_NVME;
2146                 spin_lock_irqsave(&phba->nvme_buf_list_put_lock, iflag);
2147                 list_add_tail(&lpfc_ncmd->list, &phba->lpfc_nvme_buf_list_put);
2148                 spin_unlock_irqrestore(&phba->nvme_buf_list_put_lock, iflag);
2149         }
2150 }
2151
2152 /**
2153  * lpfc_nvme_create_localport - Create/Bind an nvme localport instance.
2154  * @pvport - the lpfc_vport instance requesting a localport.
2155  *
2156  * This routine is invoked to create an nvme localport instance to bind
2157  * to the nvme_fc_transport.  It is called once during driver load
2158  * like lpfc_create_shost after all other services are initialized.
2159  * It requires a vport, vpi, and wwns at call time.  Other localport
2160  * parameters are modified as the driver's FCID and the Fabric WWN
2161  * are established.
2162  *
2163  * Return codes
2164  *      0 - successful
2165  *      -ENOMEM - no heap memory available
2166  *      other values - from nvme registration upcall
2167  **/
2168 int
2169 lpfc_nvme_create_localport(struct lpfc_vport *vport)
2170 {
2171         int ret = 0;
2172         struct lpfc_hba  *phba = vport->phba;
2173         struct nvme_fc_port_info nfcp_info;
2174         struct nvme_fc_local_port *localport;
2175         struct lpfc_nvme_lport *lport;
2176         int len;
2177
2178         /* Initialize this localport instance.  The vport wwn usage ensures
2179          * that NPIV is accounted for.
2180          */
2181         memset(&nfcp_info, 0, sizeof(struct nvme_fc_port_info));
2182         nfcp_info.port_role = FC_PORT_ROLE_NVME_INITIATOR;
2183         nfcp_info.node_name = wwn_to_u64(vport->fc_nodename.u.wwn);
2184         nfcp_info.port_name = wwn_to_u64(vport->fc_portname.u.wwn);
2185
2186         /* Limit to LPFC_MAX_NVME_SEG_CNT.
2187          * For now need + 1 to get around NVME transport logic.
2188          */
2189         if (phba->cfg_sg_seg_cnt > LPFC_MAX_NVME_SEG_CNT) {
2190                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME | LOG_INIT,
2191                                  "6300 Reducing sg segment cnt to %d\n",
2192                                  LPFC_MAX_NVME_SEG_CNT);
2193                 phba->cfg_nvme_seg_cnt = LPFC_MAX_NVME_SEG_CNT;
2194         } else {
2195                 phba->cfg_nvme_seg_cnt = phba->cfg_sg_seg_cnt;
2196         }
2197         lpfc_nvme_template.max_sgl_segments = phba->cfg_nvme_seg_cnt + 1;
2198         lpfc_nvme_template.max_hw_queues = phba->cfg_nvme_io_channel;
2199
2200         /* localport is allocated from the stack, but the registration
2201          * call allocates heap memory as well as the private area.
2202          */
2203 #if (IS_ENABLED(CONFIG_NVME_FC))
2204         ret = nvme_fc_register_localport(&nfcp_info, &lpfc_nvme_template,
2205                                          &vport->phba->pcidev->dev, &localport);
2206 #else
2207         ret = -ENOMEM;
2208 #endif
2209         if (!ret) {
2210                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME | LOG_NVME_DISC,
2211                                  "6005 Successfully registered local "
2212                                  "NVME port num %d, localP %p, private %p, "
2213                                  "sg_seg %d\n",
2214                                  localport->port_num, localport,
2215                                  localport->private,
2216                                  lpfc_nvme_template.max_sgl_segments);
2217
2218                 /* Private is our lport size declared in the template. */
2219                 lport = (struct lpfc_nvme_lport *)localport->private;
2220                 vport->localport = localport;
2221                 lport->vport = vport;
2222                 vport->nvmei_support = 1;
2223
2224                 /* Don't post more new bufs if repost already recovered
2225                  * the nvme sgls.
2226                  */
2227                 if (phba->sli4_hba.nvme_xri_cnt == 0) {
2228                         len  = lpfc_new_nvme_buf(vport,
2229                                                  phba->sli4_hba.nvme_xri_max);
2230                         vport->phba->total_nvme_bufs += len;
2231                 }
2232         }
2233
2234         return ret;
2235 }
2236
2237 /**
2238  * lpfc_nvme_destroy_localport - Destroy lpfc_nvme bound to nvme transport.
2239  * @pnvme: pointer to lpfc nvme data structure.
2240  *
2241  * This routine is invoked to destroy all lports bound to the phba.
2242  * The lport memory was allocated by the nvme fc transport and is
2243  * released there.  This routine ensures all rports bound to the
2244  * lport have been disconnected.
2245  *
2246  **/
2247 void
2248 lpfc_nvme_destroy_localport(struct lpfc_vport *vport)
2249 {
2250 #if (IS_ENABLED(CONFIG_NVME_FC))
2251         struct nvme_fc_local_port *localport;
2252         struct lpfc_nvme_lport *lport;
2253         int ret;
2254
2255         if (vport->nvmei_support == 0)
2256                 return;
2257
2258         localport = vport->localport;
2259         vport->localport = NULL;
2260         lport = (struct lpfc_nvme_lport *)localport->private;
2261
2262         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
2263                          "6011 Destroying NVME localport %p\n",
2264                          localport);
2265
2266         /* lport's rport list is clear.  Unregister
2267          * lport and release resources.
2268          */
2269         init_completion(&lport->lport_unreg_done);
2270         ret = nvme_fc_unregister_localport(localport);
2271         wait_for_completion_timeout(&lport->lport_unreg_done, 5);
2272
2273         /* Regardless of the unregister upcall response, clear
2274          * nvmei_support.  All rports are unregistered and the
2275          * driver will clean up.
2276          */
2277         vport->nvmei_support = 0;
2278         if (ret == 0) {
2279                 lpfc_printf_vlog(vport,
2280                                  KERN_INFO, LOG_NVME_DISC,
2281                                  "6009 Unregistered lport Success\n");
2282         } else {
2283                 lpfc_printf_vlog(vport,
2284                                  KERN_INFO, LOG_NVME_DISC,
2285                                  "6010 Unregistered lport "
2286                                  "Failed, status x%x\n",
2287                                  ret);
2288         }
2289 #endif
2290 }
2291
2292 void
2293 lpfc_nvme_update_localport(struct lpfc_vport *vport)
2294 {
2295 #if (IS_ENABLED(CONFIG_NVME_FC))
2296         struct nvme_fc_local_port *localport;
2297         struct lpfc_nvme_lport *lport;
2298
2299         localport = vport->localport;
2300         if (!localport) {
2301                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_NVME,
2302                                  "6710 Update NVME fail. No localport\n");
2303                 return;
2304         }
2305         lport = (struct lpfc_nvme_lport *)localport->private;
2306         if (!lport) {
2307                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_NVME,
2308                                  "6171 Update NVME fail. localP %p, No lport\n",
2309                                  localport);
2310                 return;
2311         }
2312         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
2313                          "6012 Update NVME lport %p did x%x\n",
2314                          localport, vport->fc_myDID);
2315
2316         localport->port_id = vport->fc_myDID;
2317         if (localport->port_id == 0)
2318                 localport->port_role = FC_PORT_ROLE_NVME_DISCOVERY;
2319         else
2320                 localport->port_role = FC_PORT_ROLE_NVME_INITIATOR;
2321
2322         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
2323                          "6030 bound lport %p to DID x%06x\n",
2324                          lport, localport->port_id);
2325 #endif
2326 }
2327
2328 int
2329 lpfc_nvme_register_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
2330 {
2331 #if (IS_ENABLED(CONFIG_NVME_FC))
2332         int ret = 0;
2333         struct nvme_fc_local_port *localport;
2334         struct lpfc_nvme_lport *lport;
2335         struct lpfc_nvme_rport *rport;
2336         struct nvme_fc_remote_port *remote_port;
2337         struct nvme_fc_port_info rpinfo;
2338         struct lpfc_nodelist *prev_ndlp;
2339
2340         lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_NVME_DISC,
2341                          "6006 Register NVME PORT. DID x%06x nlptype x%x\n",
2342                          ndlp->nlp_DID, ndlp->nlp_type);
2343
2344         localport = vport->localport;
2345         if (!localport)
2346                 return 0;
2347
2348         lport = (struct lpfc_nvme_lport *)localport->private;
2349
2350         /* NVME rports are not preserved across devloss.
2351          * Just register this instance.  Note, rpinfo->dev_loss_tmo
2352          * is left 0 to indicate accept transport defaults.  The
2353          * driver communicates port role capabilities consistent
2354          * with the PRLI response data.
2355          */
2356         memset(&rpinfo, 0, sizeof(struct nvme_fc_port_info));
2357         rpinfo.port_id = ndlp->nlp_DID;
2358         if (ndlp->nlp_type & NLP_NVME_TARGET)
2359                 rpinfo.port_role |= FC_PORT_ROLE_NVME_TARGET;
2360         if (ndlp->nlp_type & NLP_NVME_INITIATOR)
2361                 rpinfo.port_role |= FC_PORT_ROLE_NVME_INITIATOR;
2362
2363         if (ndlp->nlp_type & NLP_NVME_DISCOVERY)
2364                 rpinfo.port_role |= FC_PORT_ROLE_NVME_DISCOVERY;
2365
2366         rpinfo.port_name = wwn_to_u64(ndlp->nlp_portname.u.wwn);
2367         rpinfo.node_name = wwn_to_u64(ndlp->nlp_nodename.u.wwn);
2368         ret = nvme_fc_register_remoteport(localport, &rpinfo, &remote_port);
2369         if (!ret) {
2370                 /* If the ndlp already has an nrport, this is just
2371                  * a resume of the existing rport.  Else this is a
2372                  * new rport.
2373                  */
2374                 rport = remote_port->private;
2375                 if (ndlp->nrport) {
2376                         lpfc_printf_vlog(ndlp->vport, KERN_INFO,
2377                                          LOG_NVME_DISC,
2378                                          "6014 Rebinding lport to "
2379                                          "rport wwpn 0x%llx, "
2380                                          "Data: x%x x%x x%x x%06x\n",
2381                                          remote_port->port_name,
2382                                          remote_port->port_id,
2383                                          remote_port->port_role,
2384                                          ndlp->nlp_type,
2385                                          ndlp->nlp_DID);
2386                         prev_ndlp = rport->ndlp;
2387
2388                         /* Sever the ndlp<->rport connection before dropping
2389                          * the ndlp ref from register.
2390                          */
2391                         ndlp->nrport = NULL;
2392                         rport->ndlp = NULL;
2393                         if (prev_ndlp)
2394                                 lpfc_nlp_put(ndlp);
2395                 }
2396
2397                 /* Clean bind the rport to the ndlp. */
2398                 rport->remoteport = remote_port;
2399                 rport->lport = lport;
2400                 rport->ndlp = lpfc_nlp_get(ndlp);
2401                 if (!rport->ndlp)
2402                         return -1;
2403                 ndlp->nrport = rport;
2404                 lpfc_printf_vlog(vport, KERN_INFO,
2405                                  LOG_NVME_DISC | LOG_NODE,
2406                                  "6022 Binding new rport to "
2407                                  "lport %p Rport WWNN 0x%llx, "
2408                                  "Rport WWPN 0x%llx DID "
2409                                  "x%06x Role x%x\n",
2410                                  lport,
2411                                  rpinfo.node_name, rpinfo.port_name,
2412                                  rpinfo.port_id, rpinfo.port_role);
2413         } else {
2414                 lpfc_printf_vlog(vport, KERN_ERR,
2415                                  LOG_NVME_DISC | LOG_NODE,
2416                                  "6031 RemotePort Registration failed "
2417                                  "err: %d, DID x%06x\n",
2418                                  ret, ndlp->nlp_DID);
2419         }
2420
2421         return ret;
2422 #else
2423         return 0;
2424 #endif
2425 }
2426
2427 /* lpfc_nvme_unregister_port - unbind the DID and port_role from this rport.
2428  *
2429  * There is no notion of Devloss or rport recovery from the current
2430  * nvme_transport perspective.  Loss of an rport just means IO cannot
2431  * be sent and recovery is completely up to the initator.
2432  * For now, the driver just unbinds the DID and port_role so that
2433  * no further IO can be issued.  Changes are planned for later.
2434  *
2435  * Notes - the ndlp reference count is not decremented here since
2436  * since there is no nvme_transport api for devloss.  Node ref count
2437  * is only adjusted in driver unload.
2438  */
2439 void
2440 lpfc_nvme_unregister_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
2441 {
2442 #if (IS_ENABLED(CONFIG_NVME_FC))
2443         int ret;
2444         struct nvme_fc_local_port *localport;
2445         struct lpfc_nvme_lport *lport;
2446         struct lpfc_nvme_rport *rport;
2447         struct nvme_fc_remote_port *remoteport;
2448
2449         localport = vport->localport;
2450
2451         /* This is fundamental error.  The localport is always
2452          * available until driver unload.  Just exit.
2453          */
2454         if (!localport)
2455                 return;
2456
2457         lport = (struct lpfc_nvme_lport *)localport->private;
2458         if (!lport)
2459                 goto input_err;
2460
2461         rport = ndlp->nrport;
2462         if (!rport)
2463                 goto input_err;
2464
2465         remoteport = rport->remoteport;
2466         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
2467                          "6033 Unreg nvme remoteport %p, portname x%llx, "
2468                          "port_id x%06x, portstate x%x port type x%x\n",
2469                          remoteport, remoteport->port_name,
2470                          remoteport->port_id, remoteport->port_state,
2471                          ndlp->nlp_type);
2472
2473         /* Sanity check ndlp type.  Only call for NVME ports. Don't
2474          * clear any rport state until the transport calls back.
2475          */
2476         if (ndlp->nlp_type & (NLP_NVME_TARGET | NLP_NVME_INITIATOR)) {
2477                 init_completion(&rport->rport_unreg_done);
2478
2479                 /* No concern about the role change on the nvme remoteport.
2480                  * The transport will update it.
2481                  */
2482                 ret = nvme_fc_unregister_remoteport(remoteport);
2483                 if (ret != 0) {
2484                         lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
2485                                          "6167 NVME unregister failed %d "
2486                                          "port_state x%x\n",
2487                                          ret, remoteport->port_state);
2488                 }
2489
2490         }
2491         return;
2492
2493  input_err:
2494 #endif
2495         lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
2496                          "6168 State error: lport %p, rport%p FCID x%06x\n",
2497                          vport->localport, ndlp->rport, ndlp->nlp_DID);
2498 }
2499
2500 /**
2501  * lpfc_sli4_nvme_xri_aborted - Fast-path process of NVME xri abort
2502  * @phba: pointer to lpfc hba data structure.
2503  * @axri: pointer to the fcp xri abort wcqe structure.
2504  *
2505  * This routine is invoked by the worker thread to process a SLI4 fast-path
2506  * NVME aborted xri.  Aborted NVME IO commands are completed to the transport
2507  * here.
2508  **/
2509 void
2510 lpfc_sli4_nvme_xri_aborted(struct lpfc_hba *phba,
2511                            struct sli4_wcqe_xri_aborted *axri)
2512 {
2513         uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
2514         struct lpfc_nvme_buf *lpfc_ncmd, *next_lpfc_ncmd;
2515         struct nvmefc_fcp_req *nvme_cmd = NULL;
2516         struct lpfc_nodelist *ndlp;
2517         unsigned long iflag = 0;
2518
2519         if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_NVME))
2520                 return;
2521         spin_lock_irqsave(&phba->hbalock, iflag);
2522         spin_lock(&phba->sli4_hba.abts_nvme_buf_list_lock);
2523         list_for_each_entry_safe(lpfc_ncmd, next_lpfc_ncmd,
2524                                  &phba->sli4_hba.lpfc_abts_nvme_buf_list,
2525                                  list) {
2526                 if (lpfc_ncmd->cur_iocbq.sli4_xritag == xri) {
2527                         list_del_init(&lpfc_ncmd->list);
2528                         lpfc_ncmd->flags &= ~LPFC_SBUF_XBUSY;
2529                         lpfc_ncmd->status = IOSTAT_SUCCESS;
2530                         spin_unlock(
2531                                 &phba->sli4_hba.abts_nvme_buf_list_lock);
2532
2533                         spin_unlock_irqrestore(&phba->hbalock, iflag);
2534                         ndlp = lpfc_ncmd->ndlp;
2535                         if (ndlp)
2536                                 lpfc_sli4_abts_err_handler(phba, ndlp, axri);
2537
2538                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
2539                                         "6311 nvme_cmd %p xri x%x tag x%x "
2540                                         "abort complete and xri released\n",
2541                                         lpfc_ncmd->nvmeCmd, xri,
2542                                         lpfc_ncmd->cur_iocbq.iotag);
2543
2544                         /* Aborted NVME commands are required to not complete
2545                          * before the abort exchange command fully completes.
2546                          * Once completed, it is available via the put list.
2547                          */
2548                         nvme_cmd = lpfc_ncmd->nvmeCmd;
2549                         nvme_cmd->done(nvme_cmd);
2550                         lpfc_release_nvme_buf(phba, lpfc_ncmd);
2551                         return;
2552                 }
2553         }
2554         spin_unlock(&phba->sli4_hba.abts_nvme_buf_list_lock);
2555         spin_unlock_irqrestore(&phba->hbalock, iflag);
2556
2557         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
2558                         "6312 XRI Aborted xri x%x not found\n", xri);
2559
2560 }