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) 2017-2019 Broadcom. All Rights Reserved. The term *
   5  * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.  *
   6  * Copyright (C) 2004-2016 Emulex.  All rights reserved.           *
   7  * EMULEX and SLI are trademarks of Emulex.                        *
   8  * www.broadcom.com                                                *
   9  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
  10  *                                                                 *
  11  * This program is free software; you can redistribute it and/or   *
  12  * modify it under the terms of version 2 of the GNU General       *
  13  * Public License as published by the Free Software Foundation.    *
  14  * This program is distributed in the hope that it will be useful. *
  15  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  16  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  17  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  18  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  19  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  20  * more details, a copy of which can be found in the file COPYING  *
  21  * included with this package.                                     *
  22  ********************************************************************/
  23 #include <linux/pci.h>
  24 #include <linux/slab.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/delay.h>
  27 #include <asm/unaligned.h>
  28 #include <linux/crc-t10dif.h>
  29 #include <net/checksum.h>
  30
  31 #include <scsi/scsi.h>
  32 #include <scsi/scsi_device.h>
  33 #include <scsi/scsi_eh.h>
  34 #include <scsi/scsi_host.h>
  35 #include <scsi/scsi_tcq.h>
  36 #include <scsi/scsi_transport_fc.h>
  37 #include <scsi/fc/fc_fs.h>
  38
  39 #include <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_io_buf *
  60 lpfc_get_nvme_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp,
  61                   int idx, int expedite);
  62
  63 static void
  64 lpfc_release_nvme_buf(struct lpfc_hba *, struct lpfc_io_buf *);
  65
  66 static struct nvme_fc_port_template lpfc_nvme_template;
  67
  68 static union lpfc_wqe128 lpfc_iread_cmd_template;
  69 static union lpfc_wqe128 lpfc_iwrite_cmd_template;
  70 static union lpfc_wqe128 lpfc_icmnd_cmd_template;
  71
  72 /* Setup WQE templates for NVME IOs */
  73 void
  74 lpfc_nvme_cmd_template(void)
  75 {
  76         union lpfc_wqe128 *wqe;
  77
  78         /* IREAD template */
  79         wqe = &lpfc_iread_cmd_template;
  80         memset(wqe, 0, sizeof(union lpfc_wqe128));
  81
  82         /* Word 0, 1, 2 - BDE is variable */
  83
  84         /* Word 3 - cmd_buff_len, payload_offset_len is zero */
  85
  86         /* Word 4 - total_xfer_len is variable */
  87
  88         /* Word 5 - is zero */
  89
  90         /* Word 6 - ctxt_tag, xri_tag is variable */
  91
  92         /* Word 7 */
  93         bf_set(wqe_cmnd, &wqe->fcp_iread.wqe_com, CMD_FCP_IREAD64_WQE);
  94         bf_set(wqe_pu, &wqe->fcp_iread.wqe_com, PARM_READ_CHECK);
  95         bf_set(wqe_class, &wqe->fcp_iread.wqe_com, CLASS3);
  96         bf_set(wqe_ct, &wqe->fcp_iread.wqe_com, SLI4_CT_RPI);
  97
  98         /* Word 8 - abort_tag is variable */
  99
 100         /* Word 9  - reqtag is variable */
 101
 102         /* Word 10 - dbde, wqes is variable */
 103         bf_set(wqe_qosd, &wqe->fcp_iread.wqe_com, 0);
 104         bf_set(wqe_nvme, &wqe->fcp_iread.wqe_com, 1);
 105         bf_set(wqe_iod, &wqe->fcp_iread.wqe_com, LPFC_WQE_IOD_READ);
 106         bf_set(wqe_lenloc, &wqe->fcp_iread.wqe_com, LPFC_WQE_LENLOC_WORD4);
 107         bf_set(wqe_dbde, &wqe->fcp_iread.wqe_com, 0);
 108         bf_set(wqe_wqes, &wqe->fcp_iread.wqe_com, 1);
 109
 110         /* Word 11 - pbde is variable */
 111         bf_set(wqe_cmd_type, &wqe->fcp_iread.wqe_com, NVME_READ_CMD);
 112         bf_set(wqe_cqid, &wqe->fcp_iread.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
 113         bf_set(wqe_pbde, &wqe->fcp_iread.wqe_com, 1);
 114
 115         /* Word 12 - is zero */
 116
 117         /* Word 13, 14, 15 - PBDE is variable */
 118
 119         /* IWRITE template */
 120         wqe = &lpfc_iwrite_cmd_template;
 121         memset(wqe, 0, sizeof(union lpfc_wqe128));
 122
 123         /* Word 0, 1, 2 - BDE is variable */
 124
 125         /* Word 3 - cmd_buff_len, payload_offset_len is zero */
 126
 127         /* Word 4 - total_xfer_len is variable */
 128
 129         /* Word 5 - initial_xfer_len is variable */
 130
 131         /* Word 6 - ctxt_tag, xri_tag is variable */
 132
 133         /* Word 7 */
 134         bf_set(wqe_cmnd, &wqe->fcp_iwrite.wqe_com, CMD_FCP_IWRITE64_WQE);
 135         bf_set(wqe_pu, &wqe->fcp_iwrite.wqe_com, PARM_READ_CHECK);
 136         bf_set(wqe_class, &wqe->fcp_iwrite.wqe_com, CLASS3);
 137         bf_set(wqe_ct, &wqe->fcp_iwrite.wqe_com, SLI4_CT_RPI);
 138
 139         /* Word 8 - abort_tag is variable */
 140
 141         /* Word 9  - reqtag is variable */
 142
 143         /* Word 10 - dbde, wqes is variable */
 144         bf_set(wqe_qosd, &wqe->fcp_iwrite.wqe_com, 0);
 145         bf_set(wqe_nvme, &wqe->fcp_iwrite.wqe_com, 1);
 146         bf_set(wqe_iod, &wqe->fcp_iwrite.wqe_com, LPFC_WQE_IOD_WRITE);
 147         bf_set(wqe_lenloc, &wqe->fcp_iwrite.wqe_com, LPFC_WQE_LENLOC_WORD4);
 148         bf_set(wqe_dbde, &wqe->fcp_iwrite.wqe_com, 0);
 149         bf_set(wqe_wqes, &wqe->fcp_iwrite.wqe_com, 1);
 150
 151         /* Word 11 - pbde is variable */
 152         bf_set(wqe_cmd_type, &wqe->fcp_iwrite.wqe_com, NVME_WRITE_CMD);
 153         bf_set(wqe_cqid, &wqe->fcp_iwrite.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
 154         bf_set(wqe_pbde, &wqe->fcp_iwrite.wqe_com, 1);
 155
 156         /* Word 12 - is zero */
 157
 158         /* Word 13, 14, 15 - PBDE is variable */
 159
 160         /* ICMND template */
 161         wqe = &lpfc_icmnd_cmd_template;
 162         memset(wqe, 0, sizeof(union lpfc_wqe128));
 163
 164         /* Word 0, 1, 2 - BDE is variable */
 165
 166         /* Word 3 - payload_offset_len is variable */
 167
 168         /* Word 4, 5 - is zero */
 169
 170         /* Word 6 - ctxt_tag, xri_tag is variable */
 171
 172         /* Word 7 */
 173         bf_set(wqe_cmnd, &wqe->fcp_icmd.wqe_com, CMD_FCP_ICMND64_WQE);
 174         bf_set(wqe_pu, &wqe->fcp_icmd.wqe_com, 0);
 175         bf_set(wqe_class, &wqe->fcp_icmd.wqe_com, CLASS3);
 176         bf_set(wqe_ct, &wqe->fcp_icmd.wqe_com, SLI4_CT_RPI);
 177
 178         /* Word 8 - abort_tag is variable */
 179
 180         /* Word 9  - reqtag is variable */
 181
 182         /* Word 10 - dbde, wqes is variable */
 183         bf_set(wqe_qosd, &wqe->fcp_icmd.wqe_com, 1);
 184         bf_set(wqe_nvme, &wqe->fcp_icmd.wqe_com, 1);
 185         bf_set(wqe_iod, &wqe->fcp_icmd.wqe_com, LPFC_WQE_IOD_NONE);
 186         bf_set(wqe_lenloc, &wqe->fcp_icmd.wqe_com, LPFC_WQE_LENLOC_NONE);
 187         bf_set(wqe_dbde, &wqe->fcp_icmd.wqe_com, 0);
 188         bf_set(wqe_wqes, &wqe->fcp_icmd.wqe_com, 1);
 189
 190         /* Word 11 */
 191         bf_set(wqe_cmd_type, &wqe->fcp_icmd.wqe_com, FCP_COMMAND);
 192         bf_set(wqe_cqid, &wqe->fcp_icmd.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
 193         bf_set(wqe_pbde, &wqe->fcp_icmd.wqe_com, 0);
 194
 195         /* Word 12, 13, 14, 15 - is zero */
 196 }
 197
 198 /**
 199  * lpfc_nvme_create_queue -
 200  * @lpfc_pnvme: Pointer to the driver's nvme instance data
 201  * @qidx: An cpu index used to affinitize IO queues and MSIX vectors.
 202  * @handle: An opaque driver handle used in follow-up calls.
 203  *
 204  * Driver registers this routine to preallocate and initialize any
 205  * internal data structures to bind the @qidx to its internal IO queues.
 206  * A hardware queue maps (qidx) to a specific driver MSI-X vector/EQ/CQ/WQ.
 207  *
 208  * Return value :
 209  *   0 - Success
 210  *   -EINVAL - Unsupported input value.
 211  *   -ENOMEM - Could not alloc necessary memory
 212  **/
 213 static int
 214 lpfc_nvme_create_queue(struct nvme_fc_local_port *pnvme_lport,
 215                        unsigned int qidx, u16 qsize,
 216                        void **handle)
 217 {
 218         struct lpfc_nvme_lport *lport;
 219         struct lpfc_vport *vport;
 220         struct lpfc_nvme_qhandle *qhandle;
 221         char *str;
 222
 223         if (!pnvme_lport->private)
 224                 return -ENOMEM;
 225
 226         lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
 227         vport = lport->vport;
 228         qhandle = kzalloc(sizeof(struct lpfc_nvme_qhandle), GFP_KERNEL);
 229         if (qhandle == NULL)
 230                 return -ENOMEM;
 231
 232         qhandle->cpu_id = smp_processor_id();
 233         qhandle->qidx = qidx;
 234         /*
 235          * NVME qidx == 0 is the admin queue, so both admin queue
 236          * and first IO queue will use MSI-X vector and associated
 237          * EQ/CQ/WQ at index 0. After that they are sequentially assigned.
 238          */
 239         if (qidx) {
 240                 str = "IO ";  /* IO queue */
 241                 qhandle->index = ((qidx - 1) %
 242                         lpfc_nvme_template.max_hw_queues);
 243         } else {
 244                 str = "ADM";  /* Admin queue */
 245                 qhandle->index = qidx;
 246         }
 247
 248         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
 249                          "6073 Binding %s HdwQueue %d  (cpu %d) to "
 250                          "hdw_queue %d qhandle %p\n", str,
 251                          qidx, qhandle->cpu_id, qhandle->index, qhandle);
 252         *handle = (void *)qhandle;
 253         return 0;
 254 }
 255
 256 /**
 257  * lpfc_nvme_delete_queue -
 258  * @lpfc_pnvme: Pointer to the driver's nvme instance data
 259  * @qidx: An cpu index used to affinitize IO queues and MSIX vectors.
 260  * @handle: An opaque driver handle from lpfc_nvme_create_queue
 261  *
 262  * Driver registers this routine to free
 263  * any internal data structures to bind the @qidx to its internal
 264  * IO queues.
 265  *
 266  * Return value :
 267  *   0 - Success
 268  *   TODO:  What are the failure codes.
 269  **/
 270 static void
 271 lpfc_nvme_delete_queue(struct nvme_fc_local_port *pnvme_lport,
 272                        unsigned int qidx,
 273                        void *handle)
 274 {
 275         struct lpfc_nvme_lport *lport;
 276         struct lpfc_vport *vport;
 277
 278         if (!pnvme_lport->private)
 279                 return;
 280
 281         lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
 282         vport = lport->vport;
 283
 284         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
 285                         "6001 ENTER.  lpfc_pnvme %p, qidx x%x qhandle %p\n",
 286                         lport, qidx, handle);
 287         kfree(handle);
 288 }
 289
 290 static void
 291 lpfc_nvme_localport_delete(struct nvme_fc_local_port *localport)
 292 {
 293         struct lpfc_nvme_lport *lport = localport->private;
 294
 295         lpfc_printf_vlog(lport->vport, KERN_INFO, LOG_NVME,
 296                          "6173 localport %p delete complete\n",
 297                          lport);
 298
 299         /* release any threads waiting for the unreg to complete */
 300         if (lport->vport->localport)
 301                 complete(lport->lport_unreg_cmp);
 302 }
 303
 304 /* lpfc_nvme_remoteport_delete
 305  *
 306  * @remoteport: Pointer to an nvme transport remoteport instance.
 307  *
 308  * This is a template downcall.  NVME transport calls this function
 309  * when it has completed the unregistration of a previously
 310  * registered remoteport.
 311  *
 312  * Return value :
 313  * None
 314  */
 315 void
 316 lpfc_nvme_remoteport_delete(struct nvme_fc_remote_port *remoteport)
 317 {
 318         struct lpfc_nvme_rport *rport = remoteport->private;
 319         struct lpfc_vport *vport;
 320         struct lpfc_nodelist *ndlp;
 321
 322         ndlp = rport->ndlp;
 323         if (!ndlp)
 324                 goto rport_err;
 325
 326         vport = ndlp->vport;
 327         if (!vport)
 328                 goto rport_err;
 329
 330         /* Remove this rport from the lport's list - memory is owned by the
 331          * transport. Remove the ndlp reference for the NVME transport before
 332          * calling state machine to remove the node.
 333          */
 334         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
 335                         "6146 remoteport delete of remoteport %p\n",
 336                         remoteport);
 337         spin_lock_irq(&vport->phba->hbalock);
 338
 339         /* The register rebind might have occurred before the delete
 340          * downcall.  Guard against this race.
 341          */
 342         if (ndlp->upcall_flags & NLP_WAIT_FOR_UNREG) {
 343                 ndlp->nrport = NULL;
 344                 ndlp->upcall_flags &= ~NLP_WAIT_FOR_UNREG;
 345         }
 346         spin_unlock_irq(&vport->phba->hbalock);
 347
 348         /* Remove original register reference. The host transport
 349          * won't reference this rport/remoteport any further.
 350          */
 351         lpfc_nlp_put(ndlp);
 352
 353  rport_err:
 354         return;
 355 }
 356
 357 static void
 358 lpfc_nvme_cmpl_gen_req(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
 359                        struct lpfc_wcqe_complete *wcqe)
 360 {
 361         struct lpfc_vport *vport = cmdwqe->vport;
 362         struct lpfc_nvme_lport *lport;
 363         uint32_t status;
 364         struct nvmefc_ls_req *pnvme_lsreq;
 365         struct lpfc_dmabuf *buf_ptr;
 366         struct lpfc_nodelist *ndlp;
 367
 368         pnvme_lsreq = (struct nvmefc_ls_req *)cmdwqe->context2;
 369         status = bf_get(lpfc_wcqe_c_status, wcqe) & LPFC_IOCB_STATUS_MASK;
 370
 371         if (vport->localport) {
 372                 lport = (struct lpfc_nvme_lport *)vport->localport->private;
 373                 if (lport) {
 374                         atomic_inc(&lport->fc4NvmeLsCmpls);
 375                         if (status) {
 376                                 if (bf_get(lpfc_wcqe_c_xb, wcqe))
 377                                         atomic_inc(&lport->cmpl_ls_xb);
 378                                 atomic_inc(&lport->cmpl_ls_err);
 379                         }
 380                 }
 381         }
 382
 383         ndlp = (struct lpfc_nodelist *)cmdwqe->context1;
 384         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
 385                          "6047 nvme cmpl Enter "
 386                          "Data %p DID %x Xri: %x status %x reason x%x cmd:%p "
 387                          "lsreg:%p bmp:%p ndlp:%p\n",
 388                          pnvme_lsreq, ndlp ? ndlp->nlp_DID : 0,
 389                          cmdwqe->sli4_xritag, status,
 390                          (wcqe->parameter & 0xffff),
 391                          cmdwqe, pnvme_lsreq, cmdwqe->context3, ndlp);
 392
 393         lpfc_nvmeio_data(phba, "NVME LS  CMPL: xri x%x stat x%x parm x%x\n",
 394                          cmdwqe->sli4_xritag, status, wcqe->parameter);
 395
 396         if (cmdwqe->context3) {
 397                 buf_ptr = (struct lpfc_dmabuf *)cmdwqe->context3;
 398                 lpfc_mbuf_free(phba, buf_ptr->virt, buf_ptr->phys);
 399                 kfree(buf_ptr);
 400                 cmdwqe->context3 = NULL;
 401         }
 402         if (pnvme_lsreq->done)
 403                 pnvme_lsreq->done(pnvme_lsreq, status);
 404         else
 405                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
 406                                  "6046 nvme cmpl without done call back? "
 407                                  "Data %p DID %x Xri: %x status %x\n",
 408                                 pnvme_lsreq, ndlp ? ndlp->nlp_DID : 0,
 409                                 cmdwqe->sli4_xritag, status);
 410         if (ndlp) {
 411                 lpfc_nlp_put(ndlp);
 412                 cmdwqe->context1 = NULL;
 413         }
 414         lpfc_sli_release_iocbq(phba, cmdwqe);
 415 }
 416
 417 static int
 418 lpfc_nvme_gen_req(struct lpfc_vport *vport, struct lpfc_dmabuf *bmp,
 419                   struct lpfc_dmabuf *inp,
 420                   struct nvmefc_ls_req *pnvme_lsreq,
 421                   void (*cmpl)(struct lpfc_hba *, struct lpfc_iocbq *,
 422                                struct lpfc_wcqe_complete *),
 423                   struct lpfc_nodelist *ndlp, uint32_t num_entry,
 424                   uint32_t tmo, uint8_t retry)
 425 {
 426         struct lpfc_hba *phba = vport->phba;
 427         union lpfc_wqe128 *wqe;
 428         struct lpfc_iocbq *genwqe;
 429         struct ulp_bde64 *bpl;
 430         struct ulp_bde64 bde;
 431         int i, rc, xmit_len, first_len;
 432
 433         /* Allocate buffer for  command WQE */
 434         genwqe = lpfc_sli_get_iocbq(phba);
 435         if (genwqe == NULL)
 436                 return 1;
 437
 438         wqe = &genwqe->wqe;
 439         memset(wqe, 0, sizeof(union lpfc_wqe));
 440
 441         genwqe->context3 = (uint8_t *)bmp;
 442         genwqe->iocb_flag |= LPFC_IO_NVME_LS;
 443
 444         /* Save for completion so we can release these resources */
 445         genwqe->context1 = lpfc_nlp_get(ndlp);
 446         genwqe->context2 = (uint8_t *)pnvme_lsreq;
 447         /* Fill in payload, bp points to frame payload */
 448
 449         if (!tmo)
 450                 /* FC spec states we need 3 * ratov for CT requests */
 451                 tmo = (3 * phba->fc_ratov);
 452
 453         /* For this command calculate the xmit length of the request bde. */
 454         xmit_len = 0;
 455         first_len = 0;
 456         bpl = (struct ulp_bde64 *)bmp->virt;
 457         for (i = 0; i < num_entry; i++) {
 458                 bde.tus.w = bpl[i].tus.w;
 459                 if (bde.tus.f.bdeFlags != BUFF_TYPE_BDE_64)
 460                         break;
 461                 xmit_len += bde.tus.f.bdeSize;
 462                 if (i == 0)
 463                         first_len = xmit_len;
 464         }
 465
 466         genwqe->rsvd2 = num_entry;
 467         genwqe->hba_wqidx = 0;
 468
 469         /* Words 0 - 2 */
 470         wqe->generic.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 471         wqe->generic.bde.tus.f.bdeSize = first_len;
 472         wqe->generic.bde.addrLow = bpl[0].addrLow;
 473         wqe->generic.bde.addrHigh = bpl[0].addrHigh;
 474
 475         /* Word 3 */
 476         wqe->gen_req.request_payload_len = first_len;
 477
 478         /* Word 4 */
 479
 480         /* Word 5 */
 481         bf_set(wqe_dfctl, &wqe->gen_req.wge_ctl, 0);
 482         bf_set(wqe_si, &wqe->gen_req.wge_ctl, 1);
 483         bf_set(wqe_la, &wqe->gen_req.wge_ctl, 1);
 484         bf_set(wqe_rctl, &wqe->gen_req.wge_ctl, FC_RCTL_ELS4_REQ);
 485         bf_set(wqe_type, &wqe->gen_req.wge_ctl, FC_TYPE_NVME);
 486
 487         /* Word 6 */
 488         bf_set(wqe_ctxt_tag, &wqe->gen_req.wqe_com,
 489                phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
 490         bf_set(wqe_xri_tag, &wqe->gen_req.wqe_com, genwqe->sli4_xritag);
 491
 492         /* Word 7 */
 493         bf_set(wqe_tmo, &wqe->gen_req.wqe_com, (vport->phba->fc_ratov-1));
 494         bf_set(wqe_class, &wqe->gen_req.wqe_com, CLASS3);
 495         bf_set(wqe_cmnd, &wqe->gen_req.wqe_com, CMD_GEN_REQUEST64_WQE);
 496         bf_set(wqe_ct, &wqe->gen_req.wqe_com, SLI4_CT_RPI);
 497
 498         /* Word 8 */
 499         wqe->gen_req.wqe_com.abort_tag = genwqe->iotag;
 500
 501         /* Word 9 */
 502         bf_set(wqe_reqtag, &wqe->gen_req.wqe_com, genwqe->iotag);
 503
 504         /* Word 10 */
 505         bf_set(wqe_dbde, &wqe->gen_req.wqe_com, 1);
 506         bf_set(wqe_iod, &wqe->gen_req.wqe_com, LPFC_WQE_IOD_READ);
 507         bf_set(wqe_qosd, &wqe->gen_req.wqe_com, 1);
 508         bf_set(wqe_lenloc, &wqe->gen_req.wqe_com, LPFC_WQE_LENLOC_NONE);
 509         bf_set(wqe_ebde_cnt, &wqe->gen_req.wqe_com, 0);
 510
 511         /* Word 11 */
 512         bf_set(wqe_cqid, &wqe->gen_req.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
 513         bf_set(wqe_cmd_type, &wqe->gen_req.wqe_com, OTHER_COMMAND);
 514
 515
 516         /* Issue GEN REQ WQE for NPORT <did> */
 517         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
 518                          "6050 Issue GEN REQ WQE to NPORT x%x "
 519                          "Data: x%x x%x wq:%p lsreq:%p bmp:%p xmit:%d 1st:%d\n",
 520                          ndlp->nlp_DID, genwqe->iotag,
 521                          vport->port_state,
 522                         genwqe, pnvme_lsreq, bmp, xmit_len, first_len);
 523         genwqe->wqe_cmpl = cmpl;
 524         genwqe->iocb_cmpl = NULL;
 525         genwqe->drvrTimeout = tmo + LPFC_DRVR_TIMEOUT;
 526         genwqe->vport = vport;
 527         genwqe->retry = retry;
 528
 529         lpfc_nvmeio_data(phba, "NVME LS  XMIT: xri x%x iotag x%x to x%06x\n",
 530                          genwqe->sli4_xritag, genwqe->iotag, ndlp->nlp_DID);
 531
 532         rc = lpfc_sli4_issue_wqe(phba, &phba->sli4_hba.hdwq[0], genwqe);
 533         if (rc) {
 534                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 535                                  "6045 Issue GEN REQ WQE to NPORT x%x "
 536                                  "Data: x%x x%x\n",
 537                                  ndlp->nlp_DID, genwqe->iotag,
 538                                  vport->port_state);
 539                 lpfc_sli_release_iocbq(phba, genwqe);
 540                 return 1;
 541         }
 542         return 0;
 543 }
 544
 545 /**
 546  * lpfc_nvme_ls_req - Issue an Link Service request
 547  * @lpfc_pnvme: Pointer to the driver's nvme instance data
 548  * @lpfc_nvme_lport: Pointer to the driver's local port data
 549  * @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
 550  *
 551  * Driver registers this routine to handle any link service request
 552  * from the nvme_fc transport to a remote nvme-aware port.
 553  *
 554  * Return value :
 555  *   0 - Success
 556  *   TODO: What are the failure codes.
 557  **/
 558 static int
 559 lpfc_nvme_ls_req(struct nvme_fc_local_port *pnvme_lport,
 560                  struct nvme_fc_remote_port *pnvme_rport,
 561                  struct nvmefc_ls_req *pnvme_lsreq)
 562 {
 563         int ret = 0;
 564         struct lpfc_nvme_lport *lport;
 565         struct lpfc_nvme_rport *rport;
 566         struct lpfc_vport *vport;
 567         struct lpfc_nodelist *ndlp;
 568         struct ulp_bde64 *bpl;
 569         struct lpfc_dmabuf *bmp;
 570         uint16_t ntype, nstate;
 571
 572         /* there are two dma buf in the request, actually there is one and
 573          * the second one is just the start address + cmd size.
 574          * Before calling lpfc_nvme_gen_req these buffers need to be wrapped
 575          * in a lpfc_dmabuf struct. When freeing we just free the wrapper
 576          * because the nvem layer owns the data bufs.
 577          * We do not have to break these packets open, we don't care what is in
 578          * them. And we do not have to look at the resonse data, we only care
 579          * that we got a response. All of the caring is going to happen in the
 580          * nvme-fc layer.
 581          */
 582
 583         lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
 584         rport = (struct lpfc_nvme_rport *)pnvme_rport->private;
 585         if (unlikely(!lport) || unlikely(!rport))
 586                 return -EINVAL;
 587
 588         vport = lport->vport;
 589
 590         if (vport->load_flag & FC_UNLOADING)
 591                 return -ENODEV;
 592
 593         /* Need the ndlp.  It is stored in the driver's rport. */
 594         ndlp = rport->ndlp;
 595         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
 596                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE | LOG_NVME_IOERR,
 597                                  "6051 Remoteport %p, rport has invalid ndlp. "
 598                                  "Failing LS Req\n", pnvme_rport);
 599                 return -ENODEV;
 600         }
 601
 602         /* The remote node has to be a mapped nvme target or an
 603          * unmapped nvme initiator or it's an error.
 604          */
 605         ntype = ndlp->nlp_type;
 606         nstate = ndlp->nlp_state;
 607         if ((ntype & NLP_NVME_TARGET && nstate != NLP_STE_MAPPED_NODE) ||
 608             (ntype & NLP_NVME_INITIATOR && nstate != NLP_STE_UNMAPPED_NODE)) {
 609                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE | LOG_NVME_IOERR,
 610                                  "6088 DID x%06x not ready for "
 611                                  "IO. State x%x, Type x%x\n",
 612                                  pnvme_rport->port_id,
 613                                  ndlp->nlp_state, ndlp->nlp_type);
 614                 return -ENODEV;
 615         }
 616         bmp = kmalloc(sizeof(struct lpfc_dmabuf), GFP_KERNEL);
 617         if (!bmp) {
 618
 619                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
 620                                  "6044 Could not find node for DID %x\n",
 621                                  pnvme_rport->port_id);
 622                 return 2;
 623         }
 624         INIT_LIST_HEAD(&bmp->list);
 625         bmp->virt = lpfc_mbuf_alloc(vport->phba, MEM_PRI, &(bmp->phys));
 626         if (!bmp->virt) {
 627                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
 628                                  "6042 Could not find node for DID %x\n",
 629                                  pnvme_rport->port_id);
 630                 kfree(bmp);
 631                 return 3;
 632         }
 633         bpl = (struct ulp_bde64 *)bmp->virt;
 634         bpl->addrHigh = le32_to_cpu(putPaddrHigh(pnvme_lsreq->rqstdma));
 635         bpl->addrLow = le32_to_cpu(putPaddrLow(pnvme_lsreq->rqstdma));
 636         bpl->tus.f.bdeFlags = 0;
 637         bpl->tus.f.bdeSize = pnvme_lsreq->rqstlen;
 638         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 639         bpl++;
 640
 641         bpl->addrHigh = le32_to_cpu(putPaddrHigh(pnvme_lsreq->rspdma));
 642         bpl->addrLow = le32_to_cpu(putPaddrLow(pnvme_lsreq->rspdma));
 643         bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
 644         bpl->tus.f.bdeSize = pnvme_lsreq->rsplen;
 645         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 646
 647         /* Expand print to include key fields. */
 648         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
 649                          "6149 Issue LS Req to DID 0x%06x lport %p, rport %p "
 650                          "lsreq%p rqstlen:%d rsplen:%d %pad %pad\n",
 651                          ndlp->nlp_DID,
 652                          pnvme_lport, pnvme_rport,
 653                          pnvme_lsreq, pnvme_lsreq->rqstlen,
 654                          pnvme_lsreq->rsplen, &pnvme_lsreq->rqstdma,
 655                          &pnvme_lsreq->rspdma);
 656
 657         atomic_inc(&lport->fc4NvmeLsRequests);
 658
 659         /* Hardcode the wait to 30 seconds.  Connections are failing otherwise.
 660          * This code allows it all to work.
 661          */
 662         ret = lpfc_nvme_gen_req(vport, bmp, pnvme_lsreq->rqstaddr,
 663                                 pnvme_lsreq, lpfc_nvme_cmpl_gen_req,
 664                                 ndlp, 2, 30, 0);
 665         if (ret != WQE_SUCCESS) {
 666                 atomic_inc(&lport->xmt_ls_err);
 667                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
 668                                  "6052 EXIT. issue ls wqe failed lport %p, "
 669                                  "rport %p lsreq%p Status %x DID %x\n",
 670                                  pnvme_lport, pnvme_rport, pnvme_lsreq,
 671                                  ret, ndlp->nlp_DID);
 672                 lpfc_mbuf_free(vport->phba, bmp->virt, bmp->phys);
 673                 kfree(bmp);
 674                 return ret;
 675         }
 676
 677         /* Stub in routine and return 0 for now. */
 678         return ret;
 679 }
 680
 681 /**
 682  * lpfc_nvme_ls_abort - Issue an Link Service request
 683  * @lpfc_pnvme: Pointer to the driver's nvme instance data
 684  * @lpfc_nvme_lport: Pointer to the driver's local port data
 685  * @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
 686  *
 687  * Driver registers this routine to handle any link service request
 688  * from the nvme_fc transport to a remote nvme-aware port.
 689  *
 690  * Return value :
 691  *   0 - Success
 692  *   TODO: What are the failure codes.
 693  **/
 694 static void
 695 lpfc_nvme_ls_abort(struct nvme_fc_local_port *pnvme_lport,
 696                    struct nvme_fc_remote_port *pnvme_rport,
 697                    struct nvmefc_ls_req *pnvme_lsreq)
 698 {
 699         struct lpfc_nvme_lport *lport;
 700         struct lpfc_vport *vport;
 701         struct lpfc_hba *phba;
 702         struct lpfc_nodelist *ndlp;
 703         LIST_HEAD(abort_list);
 704         struct lpfc_sli_ring *pring;
 705         struct lpfc_iocbq *wqe, *next_wqe;
 706
 707         lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
 708         if (unlikely(!lport))
 709                 return;
 710         vport = lport->vport;
 711         phba = vport->phba;
 712
 713         if (vport->load_flag & FC_UNLOADING)
 714                 return;
 715
 716         ndlp = lpfc_findnode_did(vport, pnvme_rport->port_id);
 717         if (!ndlp) {
 718                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
 719                                  "6049 Could not find node for DID %x\n",
 720                                  pnvme_rport->port_id);
 721                 return;
 722         }
 723
 724         /* Expand print to include key fields. */
 725         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS,
 726                          "6040 ENTER.  lport %p, rport %p lsreq %p rqstlen:%d "
 727                          "rsplen:%d %pad %pad\n",
 728                          pnvme_lport, pnvme_rport,
 729                          pnvme_lsreq, pnvme_lsreq->rqstlen,
 730                          pnvme_lsreq->rsplen, &pnvme_lsreq->rqstdma,
 731                          &pnvme_lsreq->rspdma);
 732
 733         /*
 734          * Lock the ELS ring txcmplq and build a local list of all ELS IOs
 735          * that need an ABTS.  The IOs need to stay on the txcmplq so that
 736          * the abort operation completes them successfully.
 737          */
 738         pring = phba->sli4_hba.nvmels_wq->pring;
 739         spin_lock_irq(&phba->hbalock);
 740         spin_lock(&pring->ring_lock);
 741         list_for_each_entry_safe(wqe, next_wqe, &pring->txcmplq, list) {
 742                 /* Add to abort_list on on NDLP match. */
 743                 if (lpfc_check_sli_ndlp(phba, pring, wqe, ndlp)) {
 744                         wqe->iocb_flag |= LPFC_DRIVER_ABORTED;
 745                         list_add_tail(&wqe->dlist, &abort_list);
 746                 }
 747         }
 748         spin_unlock(&pring->ring_lock);
 749         spin_unlock_irq(&phba->hbalock);
 750
 751         /* Abort the targeted IOs and remove them from the abort list. */
 752         list_for_each_entry_safe(wqe, next_wqe, &abort_list, dlist) {
 753                 atomic_inc(&lport->xmt_ls_abort);
 754                 spin_lock_irq(&phba->hbalock);
 755                 list_del_init(&wqe->dlist);
 756                 lpfc_sli_issue_abort_iotag(phba, pring, wqe);
 757                 spin_unlock_irq(&phba->hbalock);
 758         }
 759 }
 760
 761 /* Fix up the existing sgls for NVME IO. */
 762 static inline void
 763 lpfc_nvme_adj_fcp_sgls(struct lpfc_vport *vport,
 764                        struct lpfc_io_buf *lpfc_ncmd,
 765                        struct nvmefc_fcp_req *nCmd)
 766 {
 767         struct lpfc_hba  *phba = vport->phba;
 768         struct sli4_sge *sgl;
 769         union lpfc_wqe128 *wqe;
 770         uint32_t *wptr, *dptr;
 771
 772         /*
 773          * Get a local pointer to the built-in wqe and correct
 774          * the cmd size to match NVME's 96 bytes and fix
 775          * the dma address.
 776          */
 777
 778         wqe = &lpfc_ncmd->cur_iocbq.wqe;
 779
 780         /*
 781          * Adjust the FCP_CMD and FCP_RSP DMA data and sge_len to
 782          * match NVME.  NVME sends 96 bytes. Also, use the
 783          * nvme commands command and response dma addresses
 784          * rather than the virtual memory to ease the restore
 785          * operation.
 786          */
 787         sgl = lpfc_ncmd->dma_sgl;
 788         sgl->sge_len = cpu_to_le32(nCmd->cmdlen);
 789         if (phba->cfg_nvme_embed_cmd) {
 790                 sgl->addr_hi = 0;
 791                 sgl->addr_lo = 0;
 792
 793                 /* Word 0-2 - NVME CMND IU (embedded payload) */
 794                 wqe->generic.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_IMMED;
 795                 wqe->generic.bde.tus.f.bdeSize = 56;
 796                 wqe->generic.bde.addrHigh = 0;
 797                 wqe->generic.bde.addrLow =  64;  /* Word 16 */
 798
 799                 /* Word 10  - dbde is 0, wqes is 1 in template */
 800
 801                 /*
 802                  * Embed the payload in the last half of the WQE
 803                  * WQE words 16-30 get the NVME CMD IU payload
 804                  *
 805                  * WQE words 16-19 get payload Words 1-4
 806                  * WQE words 20-21 get payload Words 6-7
 807                  * WQE words 22-29 get payload Words 16-23
 808                  */
 809                 wptr = &wqe->words[16];  /* WQE ptr */
 810                 dptr = (uint32_t *)nCmd->cmdaddr;  /* payload ptr */
 811                 dptr++;                 /* Skip Word 0 in payload */
 812
 813                 *wptr++ = *dptr++;      /* Word 1 */
 814                 *wptr++ = *dptr++;      /* Word 2 */
 815                 *wptr++ = *dptr++;      /* Word 3 */
 816                 *wptr++ = *dptr++;      /* Word 4 */
 817                 dptr++;                 /* Skip Word 5 in payload */
 818                 *wptr++ = *dptr++;      /* Word 6 */
 819                 *wptr++ = *dptr++;      /* Word 7 */
 820                 dptr += 8;              /* Skip Words 8-15 in payload */
 821                 *wptr++ = *dptr++;      /* Word 16 */
 822                 *wptr++ = *dptr++;      /* Word 17 */
 823                 *wptr++ = *dptr++;      /* Word 18 */
 824                 *wptr++ = *dptr++;      /* Word 19 */
 825                 *wptr++ = *dptr++;      /* Word 20 */
 826                 *wptr++ = *dptr++;      /* Word 21 */
 827                 *wptr++ = *dptr++;      /* Word 22 */
 828                 *wptr   = *dptr;        /* Word 23 */
 829         } else {
 830                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(nCmd->cmddma));
 831                 sgl->addr_lo = cpu_to_le32(putPaddrLow(nCmd->cmddma));
 832
 833                 /* Word 0-2 - NVME CMND IU Inline BDE */
 834                 wqe->generic.bde.tus.f.bdeFlags =  BUFF_TYPE_BDE_64;
 835                 wqe->generic.bde.tus.f.bdeSize = nCmd->cmdlen;
 836                 wqe->generic.bde.addrHigh = sgl->addr_hi;
 837                 wqe->generic.bde.addrLow =  sgl->addr_lo;
 838
 839                 /* Word 10 */
 840                 bf_set(wqe_dbde, &wqe->generic.wqe_com, 1);
 841                 bf_set(wqe_wqes, &wqe->generic.wqe_com, 0);
 842         }
 843
 844         sgl++;
 845
 846         /* Setup the physical region for the FCP RSP */
 847         sgl->addr_hi = cpu_to_le32(putPaddrHigh(nCmd->rspdma));
 848         sgl->addr_lo = cpu_to_le32(putPaddrLow(nCmd->rspdma));
 849         sgl->word2 = le32_to_cpu(sgl->word2);
 850         if (nCmd->sg_cnt)
 851                 bf_set(lpfc_sli4_sge_last, sgl, 0);
 852         else
 853                 bf_set(lpfc_sli4_sge_last, sgl, 1);
 854         sgl->word2 = cpu_to_le32(sgl->word2);
 855         sgl->sge_len = cpu_to_le32(nCmd->rsplen);
 856 }
 857
 858 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 859 static void
 860 lpfc_nvme_ktime(struct lpfc_hba *phba,
 861                 struct lpfc_io_buf *lpfc_ncmd)
 862 {
 863         uint64_t seg1, seg2, seg3, seg4;
 864         uint64_t segsum;
 865
 866         if (!lpfc_ncmd->ts_last_cmd ||
 867             !lpfc_ncmd->ts_cmd_start ||
 868             !lpfc_ncmd->ts_cmd_wqput ||
 869             !lpfc_ncmd->ts_isr_cmpl ||
 870             !lpfc_ncmd->ts_data_nvme)
 871                 return;
 872
 873         if (lpfc_ncmd->ts_data_nvme < lpfc_ncmd->ts_cmd_start)
 874                 return;
 875         if (lpfc_ncmd->ts_cmd_start < lpfc_ncmd->ts_last_cmd)
 876                 return;
 877         if (lpfc_ncmd->ts_cmd_wqput < lpfc_ncmd->ts_cmd_start)
 878                 return;
 879         if (lpfc_ncmd->ts_isr_cmpl < lpfc_ncmd->ts_cmd_wqput)
 880                 return;
 881         if (lpfc_ncmd->ts_data_nvme < lpfc_ncmd->ts_isr_cmpl)
 882                 return;
 883         /*
 884          * Segment 1 - Time from Last FCP command cmpl is handed
 885          * off to NVME Layer to start of next command.
 886          * Segment 2 - Time from Driver receives a IO cmd start
 887          * from NVME Layer to WQ put is done on IO cmd.
 888          * Segment 3 - Time from Driver WQ put is done on IO cmd
 889          * to MSI-X ISR for IO cmpl.
 890          * Segment 4 - Time from MSI-X ISR for IO cmpl to when
 891          * cmpl is handled off to the NVME Layer.
 892          */
 893         seg1 = lpfc_ncmd->ts_cmd_start - lpfc_ncmd->ts_last_cmd;
 894         if (seg1 > 5000000)  /* 5 ms - for sequential IOs only */
 895                 seg1 = 0;
 896
 897         /* Calculate times relative to start of IO */
 898         seg2 = (lpfc_ncmd->ts_cmd_wqput - lpfc_ncmd->ts_cmd_start);
 899         segsum = seg2;
 900         seg3 = lpfc_ncmd->ts_isr_cmpl - lpfc_ncmd->ts_cmd_start;
 901         if (segsum > seg3)
 902                 return;
 903         seg3 -= segsum;
 904         segsum += seg3;
 905
 906         seg4 = lpfc_ncmd->ts_data_nvme - lpfc_ncmd->ts_cmd_start;
 907         if (segsum > seg4)
 908                 return;
 909         seg4 -= segsum;
 910
 911         phba->ktime_data_samples++;
 912         phba->ktime_seg1_total += seg1;
 913         if (seg1 < phba->ktime_seg1_min)
 914                 phba->ktime_seg1_min = seg1;
 915         else if (seg1 > phba->ktime_seg1_max)
 916                 phba->ktime_seg1_max = seg1;
 917         phba->ktime_seg2_total += seg2;
 918         if (seg2 < phba->ktime_seg2_min)
 919                 phba->ktime_seg2_min = seg2;
 920         else if (seg2 > phba->ktime_seg2_max)
 921                 phba->ktime_seg2_max = seg2;
 922         phba->ktime_seg3_total += seg3;
 923         if (seg3 < phba->ktime_seg3_min)
 924                 phba->ktime_seg3_min = seg3;
 925         else if (seg3 > phba->ktime_seg3_max)
 926                 phba->ktime_seg3_max = seg3;
 927         phba->ktime_seg4_total += seg4;
 928         if (seg4 < phba->ktime_seg4_min)
 929                 phba->ktime_seg4_min = seg4;
 930         else if (seg4 > phba->ktime_seg4_max)
 931                 phba->ktime_seg4_max = seg4;
 932
 933         lpfc_ncmd->ts_last_cmd = 0;
 934         lpfc_ncmd->ts_cmd_start = 0;
 935         lpfc_ncmd->ts_cmd_wqput  = 0;
 936         lpfc_ncmd->ts_isr_cmpl = 0;
 937         lpfc_ncmd->ts_data_nvme = 0;
 938 }
 939 #endif
 940
 941 /**
 942  * lpfc_nvme_io_cmd_wqe_cmpl - Complete an NVME-over-FCP IO
 943  * @lpfc_pnvme: Pointer to the driver's nvme instance data
 944  * @lpfc_nvme_lport: Pointer to the driver's local port data
 945  * @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
 946  *
 947  * Driver registers this routine as it io request handler.  This
 948  * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
 949  * data structure to the rport indicated in @lpfc_nvme_rport.
 950  *
 951  * Return value :
 952  *   0 - Success
 953  *   TODO: What are the failure codes.
 954  **/
 955 static void
 956 lpfc_nvme_io_cmd_wqe_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pwqeIn,
 957                           struct lpfc_wcqe_complete *wcqe)
 958 {
 959         struct lpfc_io_buf *lpfc_ncmd =
 960                 (struct lpfc_io_buf *)pwqeIn->context1;
 961         struct lpfc_vport *vport = pwqeIn->vport;
 962         struct nvmefc_fcp_req *nCmd;
 963         struct nvme_fc_ersp_iu *ep;
 964         struct nvme_fc_cmd_iu *cp;
 965         struct lpfc_nodelist *ndlp;
 966         struct lpfc_nvme_fcpreq_priv *freqpriv;
 967         struct lpfc_nvme_lport *lport;
 968         uint32_t code, status, idx, cpu;
 969         uint16_t cid, sqhd, data;
 970         uint32_t *ptr;
 971
 972         /* Sanity check on return of outstanding command */
 973         if (!lpfc_ncmd) {
 974                 lpfc_printf_vlog(vport, KERN_ERR,
 975                                  LOG_NODE | LOG_NVME_IOERR,
 976                                  "6071 Null lpfc_ncmd pointer. No "
 977                                  "release, skip completion\n");
 978                 return;
 979         }
 980
 981         /* Guard against abort handler being called at same time */
 982         spin_lock(&lpfc_ncmd->buf_lock);
 983
 984         if (!lpfc_ncmd->nvmeCmd) {
 985                 spin_unlock(&lpfc_ncmd->buf_lock);
 986                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE | LOG_NVME_IOERR,
 987                                  "6066 Missing cmpl ptrs: lpfc_ncmd %p, "
 988                                  "nvmeCmd %p\n",
 989                                  lpfc_ncmd, lpfc_ncmd->nvmeCmd);
 990
 991                 /* Release the lpfc_ncmd regardless of the missing elements. */
 992                 lpfc_release_nvme_buf(phba, lpfc_ncmd);
 993                 return;
 994         }
 995         nCmd = lpfc_ncmd->nvmeCmd;
 996         status = bf_get(lpfc_wcqe_c_status, wcqe);
 997
 998         idx = lpfc_ncmd->cur_iocbq.hba_wqidx;
 999         phba->sli4_hba.hdwq[idx].nvme_cstat.io_cmpls++;
1000
1001         if (vport->localport) {
1002                 lport = (struct lpfc_nvme_lport *)vport->localport->private;
1003                 if (lport && status) {
1004                         if (bf_get(lpfc_wcqe_c_xb, wcqe))
1005                                 atomic_inc(&lport->cmpl_fcp_xb);
1006                         atomic_inc(&lport->cmpl_fcp_err);
1007                 }
1008         }
1009
1010         lpfc_nvmeio_data(phba, "NVME FCP CMPL: xri x%x stat x%x parm x%x\n",
1011                          lpfc_ncmd->cur_iocbq.sli4_xritag,
1012                          status, wcqe->parameter);
1013         /*
1014          * Catch race where our node has transitioned, but the
1015          * transport is still transitioning.
1016          */
1017         ndlp = lpfc_ncmd->ndlp;
1018         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
1019                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_IOERR,
1020                                  "6062 Ignoring NVME cmpl.  No ndlp\n");
1021                 goto out_err;
1022         }
1023
1024         code = bf_get(lpfc_wcqe_c_code, wcqe);
1025         if (code == CQE_CODE_NVME_ERSP) {
1026                 /* For this type of CQE, we need to rebuild the rsp */
1027                 ep = (struct nvme_fc_ersp_iu *)nCmd->rspaddr;
1028
1029                 /*
1030                  * Get Command Id from cmd to plug into response. This
1031                  * code is not needed in the next NVME Transport drop.
1032                  */
1033                 cp = (struct nvme_fc_cmd_iu *)nCmd->cmdaddr;
1034                 cid = cp->sqe.common.command_id;
1035
1036                 /*
1037                  * RSN is in CQE word 2
1038                  * SQHD is in CQE Word 3 bits 15:0
1039                  * Cmd Specific info is in CQE Word 1
1040                  * and in CQE Word 0 bits 15:0
1041                  */
1042                 sqhd = bf_get(lpfc_wcqe_c_sqhead, wcqe);
1043
1044                 /* Now lets build the NVME ERSP IU */
1045                 ep->iu_len = cpu_to_be16(8);
1046                 ep->rsn = wcqe->parameter;
1047                 ep->xfrd_len = cpu_to_be32(nCmd->payload_length);
1048                 ep->rsvd12 = 0;
1049                 ptr = (uint32_t *)&ep->cqe.result.u64;
1050                 *ptr++ = wcqe->total_data_placed;
1051                 data = bf_get(lpfc_wcqe_c_ersp0, wcqe);
1052                 *ptr = (uint32_t)data;
1053                 ep->cqe.sq_head = sqhd;
1054                 ep->cqe.sq_id =  nCmd->sqid;
1055                 ep->cqe.command_id = cid;
1056                 ep->cqe.status = 0;
1057
1058                 lpfc_ncmd->status = IOSTAT_SUCCESS;
1059                 lpfc_ncmd->result = 0;
1060                 nCmd->rcv_rsplen = LPFC_NVME_ERSP_LEN;
1061                 nCmd->transferred_length = nCmd->payload_length;
1062         } else {
1063                 lpfc_ncmd->status = (status & LPFC_IOCB_STATUS_MASK);
1064                 lpfc_ncmd->result = (wcqe->parameter & IOERR_PARAM_MASK);
1065
1066                 /* For NVME, the only failure path that results in an
1067                  * IO error is when the adapter rejects it.  All other
1068                  * conditions are a success case and resolved by the
1069                  * transport.
1070                  * IOSTAT_FCP_RSP_ERROR means:
1071                  * 1. Length of data received doesn't match total
1072                  *    transfer length in WQE
1073                  * 2. If the RSP payload does NOT match these cases:
1074                  *    a. RSP length 12/24 bytes and all zeros
1075                  *    b. NVME ERSP
1076                  */
1077                 switch (lpfc_ncmd->status) {
1078                 case IOSTAT_SUCCESS:
1079                         nCmd->transferred_length = wcqe->total_data_placed;
1080                         nCmd->rcv_rsplen = 0;
1081                         nCmd->status = 0;
1082                         break;
1083                 case IOSTAT_FCP_RSP_ERROR:
1084                         nCmd->transferred_length = wcqe->total_data_placed;
1085                         nCmd->rcv_rsplen = wcqe->parameter;
1086                         nCmd->status = 0;
1087                         /* Sanity check */
1088                         if (nCmd->rcv_rsplen == LPFC_NVME_ERSP_LEN)
1089                                 break;
1090                         lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_IOERR,
1091                                          "6081 NVME Completion Protocol Error: "
1092                                          "xri %x status x%x result x%x "
1093                                          "placed x%x\n",
1094                                          lpfc_ncmd->cur_iocbq.sli4_xritag,
1095                                          lpfc_ncmd->status, lpfc_ncmd->result,
1096                                          wcqe->total_data_placed);
1097                         break;
1098                 case IOSTAT_LOCAL_REJECT:
1099                         /* Let fall through to set command final state. */
1100                         if (lpfc_ncmd->result == IOERR_ABORT_REQUESTED)
1101                                 lpfc_printf_vlog(vport, KERN_INFO,
1102                                          LOG_NVME_IOERR,
1103                                          "6032 Delay Aborted cmd %p "
1104                                          "nvme cmd %p, xri x%x, "
1105                                          "xb %d\n",
1106                                          lpfc_ncmd, nCmd,
1107                                          lpfc_ncmd->cur_iocbq.sli4_xritag,
1108                                          bf_get(lpfc_wcqe_c_xb, wcqe));
1109                 default:
1110 out_err:
1111                         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1112                                          "6072 NVME Completion Error: xri %x "
1113                                          "status x%x result x%x placed x%x\n",
1114                                          lpfc_ncmd->cur_iocbq.sli4_xritag,
1115                                          lpfc_ncmd->status, lpfc_ncmd->result,
1116                                          wcqe->total_data_placed);
1117                         nCmd->transferred_length = 0;
1118                         nCmd->rcv_rsplen = 0;
1119                         nCmd->status = NVME_SC_INTERNAL;
1120                 }
1121         }
1122
1123         /* pick up SLI4 exhange busy condition */
1124         if (bf_get(lpfc_wcqe_c_xb, wcqe))
1125                 lpfc_ncmd->flags |= LPFC_SBUF_XBUSY;
1126         else
1127                 lpfc_ncmd->flags &= ~LPFC_SBUF_XBUSY;
1128
1129         /* Update stats and complete the IO.  There is
1130          * no need for dma unprep because the nvme_transport
1131          * owns the dma address.
1132          */
1133 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1134         if (lpfc_ncmd->ts_cmd_start) {
1135                 lpfc_ncmd->ts_isr_cmpl = pwqeIn->isr_timestamp;
1136                 lpfc_ncmd->ts_data_nvme = ktime_get_ns();
1137                 phba->ktime_last_cmd = lpfc_ncmd->ts_data_nvme;
1138                 lpfc_nvme_ktime(phba, lpfc_ncmd);
1139         }
1140         if (phba->cpucheck_on & LPFC_CHECK_NVME_IO) {
1141                 idx = lpfc_ncmd->cur_iocbq.hba_wqidx;
1142                 cpu = smp_processor_id();
1143                 if (cpu < LPFC_CHECK_CPU_CNT) {
1144                         if (lpfc_ncmd->cpu != cpu)
1145                                 lpfc_printf_vlog(vport,
1146                                                  KERN_INFO, LOG_NVME_IOERR,
1147                                                  "6701 CPU Check cmpl: "
1148                                                  "cpu %d expect %d\n",
1149                                                  cpu, lpfc_ncmd->cpu);
1150                         phba->sli4_hba.hdwq[idx].cpucheck_cmpl_io[cpu]++;
1151                 }
1152         }
1153 #endif
1154
1155         /* NVME targets need completion held off until the abort exchange
1156          * completes unless the NVME Rport is getting unregistered.
1157          */
1158
1159         if (!(lpfc_ncmd->flags & LPFC_SBUF_XBUSY)) {
1160                 freqpriv = nCmd->private;
1161                 freqpriv->nvme_buf = NULL;
1162                 lpfc_ncmd->nvmeCmd = NULL;
1163                 spin_unlock(&lpfc_ncmd->buf_lock);
1164                 nCmd->done(nCmd);
1165         } else
1166                 spin_unlock(&lpfc_ncmd->buf_lock);
1167
1168         /* Call release with XB=1 to queue the IO into the abort list. */
1169         lpfc_release_nvme_buf(phba, lpfc_ncmd);
1170 }
1171
1172
1173 /**
1174  * lpfc_nvme_prep_io_cmd - Issue an NVME-over-FCP IO
1175  * @lpfc_pnvme: Pointer to the driver's nvme instance data
1176  * @lpfc_nvme_lport: Pointer to the driver's local port data
1177  * @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
1178  * @lpfc_nvme_fcreq: IO request from nvme fc to driver.
1179  * @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue
1180  *
1181  * Driver registers this routine as it io request handler.  This
1182  * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
1183  * data structure to the rport indicated in @lpfc_nvme_rport.
1184  *
1185  * Return value :
1186  *   0 - Success
1187  *   TODO: What are the failure codes.
1188  **/
1189 static int
1190 lpfc_nvme_prep_io_cmd(struct lpfc_vport *vport,
1191                       struct lpfc_io_buf *lpfc_ncmd,
1192                       struct lpfc_nodelist *pnode,
1193                       struct lpfc_fc4_ctrl_stat *cstat)
1194 {
1195         struct lpfc_hba *phba = vport->phba;
1196         struct nvmefc_fcp_req *nCmd = lpfc_ncmd->nvmeCmd;
1197         struct lpfc_iocbq *pwqeq = &(lpfc_ncmd->cur_iocbq);
1198         union lpfc_wqe128 *wqe = &pwqeq->wqe;
1199         uint32_t req_len;
1200
1201         if (!NLP_CHK_NODE_ACT(pnode))
1202                 return -EINVAL;
1203
1204         /*
1205          * There are three possibilities here - use scatter-gather segment, use
1206          * the single mapping, or neither.
1207          */
1208         if (nCmd->sg_cnt) {
1209                 if (nCmd->io_dir == NVMEFC_FCP_WRITE) {
1210                         /* From the iwrite template, initialize words 7 - 11 */
1211                         memcpy(&wqe->words[7],
1212                                &lpfc_iwrite_cmd_template.words[7],
1213                                sizeof(uint32_t) * 5);
1214
1215                         /* Word 4 */
1216                         wqe->fcp_iwrite.total_xfer_len = nCmd->payload_length;
1217
1218                         /* Word 5 */
1219                         if ((phba->cfg_nvme_enable_fb) &&
1220                             (pnode->nlp_flag & NLP_FIRSTBURST)) {
1221                                 req_len = lpfc_ncmd->nvmeCmd->payload_length;
1222                                 if (req_len < pnode->nvme_fb_size)
1223                                         wqe->fcp_iwrite.initial_xfer_len =
1224                                                 req_len;
1225                                 else
1226                                         wqe->fcp_iwrite.initial_xfer_len =
1227                                                 pnode->nvme_fb_size;
1228                         } else {
1229                                 wqe->fcp_iwrite.initial_xfer_len = 0;
1230                         }
1231                         cstat->output_requests++;
1232                 } else {
1233                         /* From the iread template, initialize words 7 - 11 */
1234                         memcpy(&wqe->words[7],
1235                                &lpfc_iread_cmd_template.words[7],
1236                                sizeof(uint32_t) * 5);
1237
1238                         /* Word 4 */
1239                         wqe->fcp_iread.total_xfer_len = nCmd->payload_length;
1240
1241                         /* Word 5 */
1242                         wqe->fcp_iread.rsrvd5 = 0;
1243
1244                         cstat->input_requests++;
1245                 }
1246         } else {
1247                 /* From the icmnd template, initialize words 4 - 11 */
1248                 memcpy(&wqe->words[4], &lpfc_icmnd_cmd_template.words[4],
1249                        sizeof(uint32_t) * 8);
1250                 cstat->control_requests++;
1251         }
1252         /*
1253          * Finish initializing those WQE fields that are independent
1254          * of the nvme_cmnd request_buffer
1255          */
1256
1257         /* Word 3 */
1258         bf_set(payload_offset_len, &wqe->fcp_icmd,
1259                (nCmd->rsplen + nCmd->cmdlen));
1260
1261         /* Word 6 */
1262         bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
1263                phba->sli4_hba.rpi_ids[pnode->nlp_rpi]);
1264         bf_set(wqe_xri_tag, &wqe->generic.wqe_com, pwqeq->sli4_xritag);
1265
1266         /* Word 8 */
1267         wqe->generic.wqe_com.abort_tag = pwqeq->iotag;
1268
1269         /* Word 9 */
1270         bf_set(wqe_reqtag, &wqe->generic.wqe_com, pwqeq->iotag);
1271
1272         /* Words 13 14 15 are for PBDE support */
1273
1274         pwqeq->vport = vport;
1275         return 0;
1276 }
1277
1278
1279 /**
1280  * lpfc_nvme_prep_io_dma - Issue an NVME-over-FCP IO
1281  * @lpfc_pnvme: Pointer to the driver's nvme instance data
1282  * @lpfc_nvme_lport: Pointer to the driver's local port data
1283  * @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
1284  * @lpfc_nvme_fcreq: IO request from nvme fc to driver.
1285  * @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue
1286  *
1287  * Driver registers this routine as it io request handler.  This
1288  * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
1289  * data structure to the rport indicated in @lpfc_nvme_rport.
1290  *
1291  * Return value :
1292  *   0 - Success
1293  *   TODO: What are the failure codes.
1294  **/
1295 static int
1296 lpfc_nvme_prep_io_dma(struct lpfc_vport *vport,
1297                       struct lpfc_io_buf *lpfc_ncmd)
1298 {
1299         struct lpfc_hba *phba = vport->phba;
1300         struct nvmefc_fcp_req *nCmd = lpfc_ncmd->nvmeCmd;
1301         union lpfc_wqe128 *wqe = &lpfc_ncmd->cur_iocbq.wqe;
1302         struct sli4_sge *sgl = lpfc_ncmd->dma_sgl;
1303         struct scatterlist *data_sg;
1304         struct sli4_sge *first_data_sgl;
1305         struct ulp_bde64 *bde;
1306         dma_addr_t physaddr;
1307         uint32_t num_bde = 0;
1308         uint32_t dma_len;
1309         uint32_t dma_offset = 0;
1310         int nseg, i;
1311
1312         /* Fix up the command and response DMA stuff. */
1313         lpfc_nvme_adj_fcp_sgls(vport, lpfc_ncmd, nCmd);
1314
1315         /*
1316          * There are three possibilities here - use scatter-gather segment, use
1317          * the single mapping, or neither.
1318          */
1319         if (nCmd->sg_cnt) {
1320                 /*
1321                  * Jump over the cmd and rsp SGEs.  The fix routine
1322                  * has already adjusted for this.
1323                  */
1324                 sgl += 2;
1325
1326                 first_data_sgl = sgl;
1327                 lpfc_ncmd->seg_cnt = nCmd->sg_cnt;
1328                 if (lpfc_ncmd->seg_cnt > lpfc_nvme_template.max_sgl_segments) {
1329                         lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
1330                                         "6058 Too many sg segments from "
1331                                         "NVME Transport.  Max %d, "
1332                                         "nvmeIO sg_cnt %d\n",
1333                                         phba->cfg_nvme_seg_cnt + 1,
1334                                         lpfc_ncmd->seg_cnt);
1335                         lpfc_ncmd->seg_cnt = 0;
1336                         return 1;
1337                 }
1338
1339                 /*
1340                  * The driver established a maximum scatter-gather segment count
1341                  * during probe that limits the number of sg elements in any
1342                  * single nvme command.  Just run through the seg_cnt and format
1343                  * the sge's.
1344                  */
1345                 nseg = nCmd->sg_cnt;
1346                 data_sg = nCmd->first_sgl;
1347                 for (i = 0; i < nseg; i++) {
1348                         if (data_sg == NULL) {
1349                                 lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
1350                                                 "6059 dptr err %d, nseg %d\n",
1351                                                 i, nseg);
1352                                 lpfc_ncmd->seg_cnt = 0;
1353                                 return 1;
1354                         }
1355                         physaddr = data_sg->dma_address;
1356                         dma_len = data_sg->length;
1357                         sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
1358                         sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
1359                         sgl->word2 = le32_to_cpu(sgl->word2);
1360                         if ((num_bde + 1) == nseg)
1361                                 bf_set(lpfc_sli4_sge_last, sgl, 1);
1362                         else
1363                                 bf_set(lpfc_sli4_sge_last, sgl, 0);
1364                         bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
1365                         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
1366                         sgl->word2 = cpu_to_le32(sgl->word2);
1367                         sgl->sge_len = cpu_to_le32(dma_len);
1368
1369                         dma_offset += dma_len;
1370                         data_sg = sg_next(data_sg);
1371                         sgl++;
1372                 }
1373                 if (phba->cfg_enable_pbde) {
1374                         /* Use PBDE support for first SGL only, offset == 0 */
1375                         /* Words 13-15 */
1376                         bde = (struct ulp_bde64 *)
1377                                 &wqe->words[13];
1378                         bde->addrLow = first_data_sgl->addr_lo;
1379                         bde->addrHigh = first_data_sgl->addr_hi;
1380                         bde->tus.f.bdeSize =
1381                                 le32_to_cpu(first_data_sgl->sge_len);
1382                         bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
1383                         bde->tus.w = cpu_to_le32(bde->tus.w);
1384                         /* wqe_pbde is 1 in template */
1385                 } else {
1386                         memset(&wqe->words[13], 0, (sizeof(uint32_t) * 3));
1387                         bf_set(wqe_pbde, &wqe->generic.wqe_com, 0);
1388                 }
1389
1390         } else {
1391                 lpfc_ncmd->seg_cnt = 0;
1392
1393                 /* For this clause to be valid, the payload_length
1394                  * and sg_cnt must zero.
1395                  */
1396                 if (nCmd->payload_length != 0) {
1397                         lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
1398                                         "6063 NVME DMA Prep Err: sg_cnt %d "
1399                                         "payload_length x%x\n",
1400                                         nCmd->sg_cnt, nCmd->payload_length);
1401                         return 1;
1402                 }
1403         }
1404         return 0;
1405 }
1406
1407 /**
1408  * lpfc_nvme_fcp_io_submit - Issue an NVME-over-FCP IO
1409  * @lpfc_pnvme: Pointer to the driver's nvme instance data
1410  * @lpfc_nvme_lport: Pointer to the driver's local port data
1411  * @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
1412  * @lpfc_nvme_fcreq: IO request from nvme fc to driver.
1413  * @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue
1414  *
1415  * Driver registers this routine as it io request handler.  This
1416  * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
1417  * data structure to the rport
1418  indicated in @lpfc_nvme_rport.
1419  *
1420  * Return value :
1421  *   0 - Success
1422  *   TODO: What are the failure codes.
1423  **/
1424 static int
1425 lpfc_nvme_fcp_io_submit(struct nvme_fc_local_port *pnvme_lport,
1426                         struct nvme_fc_remote_port *pnvme_rport,
1427                         void *hw_queue_handle,
1428                         struct nvmefc_fcp_req *pnvme_fcreq)
1429 {
1430         int ret = 0;
1431         int expedite = 0;
1432         int idx, cpu;
1433         struct lpfc_nvme_lport *lport;
1434         struct lpfc_fc4_ctrl_stat *cstat;
1435         struct lpfc_vport *vport;
1436         struct lpfc_hba *phba;
1437         struct lpfc_nodelist *ndlp;
1438         struct lpfc_io_buf *lpfc_ncmd;
1439         struct lpfc_nvme_rport *rport;
1440         struct lpfc_nvme_qhandle *lpfc_queue_info;
1441         struct lpfc_nvme_fcpreq_priv *freqpriv;
1442         struct nvme_common_command *sqe;
1443 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1444         uint64_t start = 0;
1445 #endif
1446
1447         /* Validate pointers. LLDD fault handling with transport does
1448          * have timing races.
1449          */
1450         lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
1451         if (unlikely(!lport)) {
1452                 ret = -EINVAL;
1453                 goto out_fail;
1454         }
1455
1456         vport = lport->vport;
1457
1458         if (unlikely(!hw_queue_handle)) {
1459                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1460                                  "6117 Fail IO, NULL hw_queue_handle\n");
1461                 atomic_inc(&lport->xmt_fcp_err);
1462                 ret = -EBUSY;
1463                 goto out_fail;
1464         }
1465
1466         phba = vport->phba;
1467
1468         if (vport->load_flag & FC_UNLOADING) {
1469                 ret = -ENODEV;
1470                 goto out_fail;
1471         }
1472
1473         if (vport->load_flag & FC_UNLOADING) {
1474                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1475                                  "6124 Fail IO, Driver unload\n");
1476                 atomic_inc(&lport->xmt_fcp_err);
1477                 ret = -ENODEV;
1478                 goto out_fail;
1479         }
1480
1481         freqpriv = pnvme_fcreq->private;
1482         if (unlikely(!freqpriv)) {
1483                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1484                                  "6158 Fail IO, NULL request data\n");
1485                 atomic_inc(&lport->xmt_fcp_err);
1486                 ret = -EINVAL;
1487                 goto out_fail;
1488         }
1489
1490 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1491         if (phba->ktime_on)
1492                 start = ktime_get_ns();
1493 #endif
1494         rport = (struct lpfc_nvme_rport *)pnvme_rport->private;
1495         lpfc_queue_info = (struct lpfc_nvme_qhandle *)hw_queue_handle;
1496
1497         /*
1498          * Catch race where our node has transitioned, but the
1499          * transport is still transitioning.
1500          */
1501         ndlp = rport->ndlp;
1502         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
1503                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE | LOG_NVME_IOERR,
1504                                  "6053 Fail IO, ndlp not ready: rport %p "
1505                                   "ndlp %p, DID x%06x\n",
1506                                  rport, ndlp, pnvme_rport->port_id);
1507                 atomic_inc(&lport->xmt_fcp_err);
1508                 ret = -EBUSY;
1509                 goto out_fail;
1510         }
1511
1512         /* The remote node has to be a mapped target or it's an error. */
1513         if ((ndlp->nlp_type & NLP_NVME_TARGET) &&
1514             (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
1515                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE | LOG_NVME_IOERR,
1516                                  "6036 Fail IO, DID x%06x not ready for "
1517                                  "IO. State x%x, Type x%x Flg x%x\n",
1518                                  pnvme_rport->port_id,
1519                                  ndlp->nlp_state, ndlp->nlp_type,
1520                                  ndlp->upcall_flags);
1521                 atomic_inc(&lport->xmt_fcp_bad_ndlp);
1522                 ret = -EBUSY;
1523                 goto out_fail;
1524
1525         }
1526
1527         /* Currently only NVME Keep alive commands should be expedited
1528          * if the driver runs out of a resource. These should only be
1529          * issued on the admin queue, qidx 0
1530          */
1531         if (!lpfc_queue_info->qidx && !pnvme_fcreq->sg_cnt) {
1532                 sqe = &((struct nvme_fc_cmd_iu *)
1533                         pnvme_fcreq->cmdaddr)->sqe.common;
1534                 if (sqe->opcode == nvme_admin_keep_alive)
1535                         expedite = 1;
1536         }
1537
1538         /* The node is shared with FCP IO, make sure the IO pending count does
1539          * not exceed the programmed depth.
1540          */
1541         if (lpfc_ndlp_check_qdepth(phba, ndlp)) {
1542                 if ((atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth) &&
1543                     !expedite) {
1544                         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1545                                          "6174 Fail IO, ndlp qdepth exceeded: "
1546                                          "idx %d DID %x pend %d qdepth %d\n",
1547                                          lpfc_queue_info->index, ndlp->nlp_DID,
1548                                          atomic_read(&ndlp->cmd_pending),
1549                                          ndlp->cmd_qdepth);
1550                         atomic_inc(&lport->xmt_fcp_qdepth);
1551                         ret = -EBUSY;
1552                         goto out_fail;
1553                 }
1554         }
1555
1556         /* Lookup Hardware Queue index based on fcp_io_sched module parameter */
1557         if (phba->cfg_fcp_io_sched == LPFC_FCP_SCHED_BY_HDWQ) {
1558                 idx = lpfc_queue_info->index;
1559         } else {
1560                 cpu = smp_processor_id();
1561                 idx = phba->sli4_hba.cpu_map[cpu].hdwq;
1562         }
1563
1564         lpfc_ncmd = lpfc_get_nvme_buf(phba, ndlp, idx, expedite);
1565         if (lpfc_ncmd == NULL) {
1566                 atomic_inc(&lport->xmt_fcp_noxri);
1567                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1568                                  "6065 Fail IO, driver buffer pool is empty: "
1569                                  "idx %d DID %x\n",
1570                                  lpfc_queue_info->index, ndlp->nlp_DID);
1571                 ret = -EBUSY;
1572                 goto out_fail;
1573         }
1574 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1575         if (start) {
1576                 lpfc_ncmd->ts_cmd_start = start;
1577                 lpfc_ncmd->ts_last_cmd = phba->ktime_last_cmd;
1578         } else {
1579                 lpfc_ncmd->ts_cmd_start = 0;
1580         }
1581 #endif
1582
1583         /*
1584          * Store the data needed by the driver to issue, abort, and complete
1585          * an IO.
1586          * Do not let the IO hang out forever.  There is no midlayer issuing
1587          * an abort so inform the FW of the maximum IO pending time.
1588          */
1589         freqpriv->nvme_buf = lpfc_ncmd;
1590         lpfc_ncmd->nvmeCmd = pnvme_fcreq;
1591         lpfc_ncmd->ndlp = ndlp;
1592         lpfc_ncmd->qidx = lpfc_queue_info->qidx;
1593
1594         /*
1595          * Issue the IO on the WQ indicated by index in the hw_queue_handle.
1596          * This identfier was create in our hardware queue create callback
1597          * routine. The driver now is dependent on the IO queue steering from
1598          * the transport.  We are trusting the upper NVME layers know which
1599          * index to use and that they have affinitized a CPU to this hardware
1600          * queue. A hardware queue maps to a driver MSI-X vector/EQ/CQ/WQ.
1601          */
1602         lpfc_ncmd->cur_iocbq.hba_wqidx = idx;
1603         cstat = &phba->sli4_hba.hdwq[idx].nvme_cstat;
1604
1605         lpfc_nvme_prep_io_cmd(vport, lpfc_ncmd, ndlp, cstat);
1606         ret = lpfc_nvme_prep_io_dma(vport, lpfc_ncmd);
1607         if (ret) {
1608                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1609                                  "6175 Fail IO, Prep DMA: "
1610                                  "idx %d DID %x\n",
1611                                  lpfc_queue_info->index, ndlp->nlp_DID);
1612                 atomic_inc(&lport->xmt_fcp_err);
1613                 ret = -ENOMEM;
1614                 goto out_free_nvme_buf;
1615         }
1616
1617         lpfc_nvmeio_data(phba, "NVME FCP XMIT: xri x%x idx %d to %06x\n",
1618                          lpfc_ncmd->cur_iocbq.sli4_xritag,
1619                          lpfc_queue_info->index, ndlp->nlp_DID);
1620
1621         ret = lpfc_sli4_issue_wqe(phba, lpfc_ncmd->hdwq, &lpfc_ncmd->cur_iocbq);
1622         if (ret) {
1623                 atomic_inc(&lport->xmt_fcp_wqerr);
1624                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
1625                                  "6113 Fail IO, Could not issue WQE err %x "
1626                                  "sid: x%x did: x%x oxid: x%x\n",
1627                                  ret, vport->fc_myDID, ndlp->nlp_DID,
1628                                  lpfc_ncmd->cur_iocbq.sli4_xritag);
1629                 goto out_free_nvme_buf;
1630         }
1631
1632         if (phba->cfg_xri_rebalancing)
1633                 lpfc_keep_pvt_pool_above_lowwm(phba, lpfc_ncmd->hdwq_no);
1634
1635 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1636         if (lpfc_ncmd->ts_cmd_start)
1637                 lpfc_ncmd->ts_cmd_wqput = ktime_get_ns();
1638
1639         if (phba->cpucheck_on & LPFC_CHECK_NVME_IO) {
1640                 cpu = smp_processor_id();
1641                 if (cpu < LPFC_CHECK_CPU_CNT) {
1642                         lpfc_ncmd->cpu = cpu;
1643                         if (idx != cpu)
1644                                 lpfc_printf_vlog(vport,
1645                                                  KERN_INFO, LOG_NVME_IOERR,
1646                                                 "6702 CPU Check cmd: "
1647                                                 "cpu %d wq %d\n",
1648                                                 lpfc_ncmd->cpu,
1649                                                 lpfc_queue_info->index);
1650                         phba->sli4_hba.hdwq[idx].cpucheck_xmt_io[cpu]++;
1651                 }
1652         }
1653 #endif
1654         return 0;
1655
1656  out_free_nvme_buf:
1657         if (lpfc_ncmd->nvmeCmd->sg_cnt) {
1658                 if (lpfc_ncmd->nvmeCmd->io_dir == NVMEFC_FCP_WRITE)
1659                         cstat->output_requests--;
1660                 else
1661                         cstat->input_requests--;
1662         } else
1663                 cstat->control_requests--;
1664         lpfc_release_nvme_buf(phba, lpfc_ncmd);
1665  out_fail:
1666         return ret;
1667 }
1668
1669 /**
1670  * lpfc_nvme_abort_fcreq_cmpl - Complete an NVME FCP abort request.
1671  * @phba: Pointer to HBA context object
1672  * @cmdiocb: Pointer to command iocb object.
1673  * @rspiocb: Pointer to response iocb object.
1674  *
1675  * This is the callback function for any NVME FCP IO that was aborted.
1676  *
1677  * Return value:
1678  *   None
1679  **/
1680 void
1681 lpfc_nvme_abort_fcreq_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
1682                            struct lpfc_wcqe_complete *abts_cmpl)
1683 {
1684         lpfc_printf_log(phba, KERN_INFO, LOG_NVME,
1685                         "6145 ABORT_XRI_CN completing on rpi x%x "
1686                         "original iotag x%x, abort cmd iotag x%x "
1687                         "req_tag x%x, status x%x, hwstatus x%x\n",
1688                         cmdiocb->iocb.un.acxri.abortContextTag,
1689                         cmdiocb->iocb.un.acxri.abortIoTag,
1690                         cmdiocb->iotag,
1691                         bf_get(lpfc_wcqe_c_request_tag, abts_cmpl),
1692                         bf_get(lpfc_wcqe_c_status, abts_cmpl),
1693                         bf_get(lpfc_wcqe_c_hw_status, abts_cmpl));
1694         lpfc_sli_release_iocbq(phba, cmdiocb);
1695 }
1696
1697 /**
1698  * lpfc_nvme_fcp_abort - Issue an NVME-over-FCP ABTS
1699  * @lpfc_pnvme: Pointer to the driver's nvme instance data
1700  * @lpfc_nvme_lport: Pointer to the driver's local port data
1701  * @lpfc_nvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
1702  * @lpfc_nvme_fcreq: IO request from nvme fc to driver.
1703  * @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue
1704  *
1705  * Driver registers this routine as its nvme request io abort handler.  This
1706  * routine issues an fcp Abort WQE with data from the @lpfc_nvme_fcpreq
1707  * data structure to the rport indicated in @lpfc_nvme_rport.  This routine
1708  * is executed asynchronously - one the target is validated as "MAPPED" and
1709  * ready for IO, the driver issues the abort request and returns.
1710  *
1711  * Return value:
1712  *   None
1713  **/
1714 static void
1715 lpfc_nvme_fcp_abort(struct nvme_fc_local_port *pnvme_lport,
1716                     struct nvme_fc_remote_port *pnvme_rport,
1717                     void *hw_queue_handle,
1718                     struct nvmefc_fcp_req *pnvme_fcreq)
1719 {
1720         struct lpfc_nvme_lport *lport;
1721         struct lpfc_vport *vport;
1722         struct lpfc_hba *phba;
1723         struct lpfc_io_buf *lpfc_nbuf;
1724         struct lpfc_iocbq *abts_buf;
1725         struct lpfc_iocbq *nvmereq_wqe;
1726         struct lpfc_nvme_fcpreq_priv *freqpriv;
1727         union lpfc_wqe128 *abts_wqe;
1728         unsigned long flags;
1729         int ret_val;
1730
1731         /* Validate pointers. LLDD fault handling with transport does
1732          * have timing races.
1733          */
1734         lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
1735         if (unlikely(!lport))
1736                 return;
1737
1738         vport = lport->vport;
1739
1740         if (unlikely(!hw_queue_handle)) {
1741                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS,
1742                                  "6129 Fail Abort, HW Queue Handle NULL.\n");
1743                 return;
1744         }
1745
1746         phba = vport->phba;
1747         freqpriv = pnvme_fcreq->private;
1748
1749         if (unlikely(!freqpriv))
1750                 return;
1751         if (vport->load_flag & FC_UNLOADING)
1752                 return;
1753
1754         /* Announce entry to new IO submit field. */
1755         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS,
1756                          "6002 Abort Request to rport DID x%06x "
1757                          "for nvme_fc_req %p\n",
1758                          pnvme_rport->port_id,
1759                          pnvme_fcreq);
1760
1761         /* If the hba is getting reset, this flag is set.  It is
1762          * cleared when the reset is complete and rings reestablished.
1763          */
1764         spin_lock_irqsave(&phba->hbalock, flags);
1765         /* driver queued commands are in process of being flushed */
1766         if (phba->hba_flag & HBA_NVME_IOQ_FLUSH) {
1767                 spin_unlock_irqrestore(&phba->hbalock, flags);
1768                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
1769                                  "6139 Driver in reset cleanup - flushing "
1770                                  "NVME Req now.  hba_flag x%x\n",
1771                                  phba->hba_flag);
1772                 return;
1773         }
1774
1775         lpfc_nbuf = freqpriv->nvme_buf;
1776         if (!lpfc_nbuf) {
1777                 spin_unlock_irqrestore(&phba->hbalock, flags);
1778                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
1779                                  "6140 NVME IO req has no matching lpfc nvme "
1780                                  "io buffer.  Skipping abort req.\n");
1781                 return;
1782         } else if (!lpfc_nbuf->nvmeCmd) {
1783                 spin_unlock_irqrestore(&phba->hbalock, flags);
1784                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
1785                                  "6141 lpfc NVME IO req has no nvme_fcreq "
1786                                  "io buffer.  Skipping abort req.\n");
1787                 return;
1788         }
1789         nvmereq_wqe = &lpfc_nbuf->cur_iocbq;
1790
1791         /* Guard against IO completion being called at same time */
1792         spin_lock(&lpfc_nbuf->buf_lock);
1793
1794         /*
1795          * The lpfc_nbuf and the mapped nvme_fcreq in the driver's
1796          * state must match the nvme_fcreq passed by the nvme
1797          * transport.  If they don't match, it is likely the driver
1798          * has already completed the NVME IO and the nvme transport
1799          * has not seen it yet.
1800          */
1801         if (lpfc_nbuf->nvmeCmd != pnvme_fcreq) {
1802                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
1803                                  "6143 NVME req mismatch: "
1804                                  "lpfc_nbuf %p nvmeCmd %p, "
1805                                  "pnvme_fcreq %p.  Skipping Abort xri x%x\n",
1806                                  lpfc_nbuf, lpfc_nbuf->nvmeCmd,
1807                                  pnvme_fcreq, nvmereq_wqe->sli4_xritag);
1808                 goto out_unlock;
1809         }
1810
1811         /* Don't abort IOs no longer on the pending queue. */
1812         if (!(nvmereq_wqe->iocb_flag & LPFC_IO_ON_TXCMPLQ)) {
1813                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
1814                                  "6142 NVME IO req %p not queued - skipping "
1815                                  "abort req xri x%x\n",
1816                                  pnvme_fcreq, nvmereq_wqe->sli4_xritag);
1817                 goto out_unlock;
1818         }
1819
1820         atomic_inc(&lport->xmt_fcp_abort);
1821         lpfc_nvmeio_data(phba, "NVME FCP ABORT: xri x%x idx %d to %06x\n",
1822                          nvmereq_wqe->sli4_xritag,
1823                          nvmereq_wqe->hba_wqidx, pnvme_rport->port_id);
1824
1825         /* Outstanding abort is in progress */
1826         if (nvmereq_wqe->iocb_flag & LPFC_DRIVER_ABORTED) {
1827                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
1828                                  "6144 Outstanding NVME I/O Abort Request "
1829                                  "still pending on nvme_fcreq %p, "
1830                                  "lpfc_ncmd %p xri x%x\n",
1831                                  pnvme_fcreq, lpfc_nbuf,
1832                                  nvmereq_wqe->sli4_xritag);
1833                 goto out_unlock;
1834         }
1835
1836         abts_buf = __lpfc_sli_get_iocbq(phba);
1837         if (!abts_buf) {
1838                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
1839                                  "6136 No available abort wqes. Skipping "
1840                                  "Abts req for nvme_fcreq %p xri x%x\n",
1841                                  pnvme_fcreq, nvmereq_wqe->sli4_xritag);
1842                 goto out_unlock;
1843         }
1844
1845         /* Ready - mark outstanding as aborted by driver. */
1846         nvmereq_wqe->iocb_flag |= LPFC_DRIVER_ABORTED;
1847
1848         /* Complete prepping the abort wqe and issue to the FW. */
1849         abts_wqe = &abts_buf->wqe;
1850
1851         /* WQEs are reused.  Clear stale data and set key fields to
1852          * zero like ia, iaab, iaar, xri_tag, and ctxt_tag.
1853          */
1854         memset(abts_wqe, 0, sizeof(union lpfc_wqe));
1855         bf_set(abort_cmd_criteria, &abts_wqe->abort_cmd, T_XRI_TAG);
1856
1857         /* word 7 */
1858         bf_set(wqe_cmnd, &abts_wqe->abort_cmd.wqe_com, CMD_ABORT_XRI_CX);
1859         bf_set(wqe_class, &abts_wqe->abort_cmd.wqe_com,
1860                nvmereq_wqe->iocb.ulpClass);
1861
1862         /* word 8 - tell the FW to abort the IO associated with this
1863          * outstanding exchange ID.
1864          */
1865         abts_wqe->abort_cmd.wqe_com.abort_tag = nvmereq_wqe->sli4_xritag;
1866
1867         /* word 9 - this is the iotag for the abts_wqe completion. */
1868         bf_set(wqe_reqtag, &abts_wqe->abort_cmd.wqe_com,
1869                abts_buf->iotag);
1870
1871         /* word 10 */
1872         bf_set(wqe_qosd, &abts_wqe->abort_cmd.wqe_com, 1);
1873         bf_set(wqe_lenloc, &abts_wqe->abort_cmd.wqe_com, LPFC_WQE_LENLOC_NONE);
1874
1875         /* word 11 */
1876         bf_set(wqe_cmd_type, &abts_wqe->abort_cmd.wqe_com, OTHER_COMMAND);
1877         bf_set(wqe_wqec, &abts_wqe->abort_cmd.wqe_com, 1);
1878         bf_set(wqe_cqid, &abts_wqe->abort_cmd.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
1879
1880         /* ABTS WQE must go to the same WQ as the WQE to be aborted */
1881         abts_buf->iocb_flag |= LPFC_IO_NVME;
1882         abts_buf->hba_wqidx = nvmereq_wqe->hba_wqidx;
1883         abts_buf->vport = vport;
1884         abts_buf->wqe_cmpl = lpfc_nvme_abort_fcreq_cmpl;
1885         ret_val = lpfc_sli4_issue_wqe(phba, lpfc_nbuf->hdwq, abts_buf);
1886         spin_unlock(&lpfc_nbuf->buf_lock);
1887         spin_unlock_irqrestore(&phba->hbalock, flags);
1888         if (ret_val) {
1889                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_ABTS,
1890                                  "6137 Failed abts issue_wqe with status x%x "
1891                                  "for nvme_fcreq %p.\n",
1892                                  ret_val, pnvme_fcreq);
1893                 lpfc_sli_release_iocbq(phba, abts_buf);
1894                 return;
1895         }
1896
1897         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS,
1898                          "6138 Transport Abort NVME Request Issued for "
1899                          "ox_id x%x on reqtag x%x\n",
1900                          nvmereq_wqe->sli4_xritag,
1901                          abts_buf->iotag);
1902         return;
1903
1904 out_unlock:
1905         spin_unlock(&lpfc_nbuf->buf_lock);
1906         spin_unlock_irqrestore(&phba->hbalock, flags);
1907         return;
1908 }
1909
1910 /* Declare and initialization an instance of the FC NVME template. */
1911 static struct nvme_fc_port_template lpfc_nvme_template = {
1912         /* initiator-based functions */
1913         .localport_delete  = lpfc_nvme_localport_delete,
1914         .remoteport_delete = lpfc_nvme_remoteport_delete,
1915         .create_queue = lpfc_nvme_create_queue,
1916         .delete_queue = lpfc_nvme_delete_queue,
1917         .ls_req       = lpfc_nvme_ls_req,
1918         .fcp_io       = lpfc_nvme_fcp_io_submit,
1919         .ls_abort     = lpfc_nvme_ls_abort,
1920         .fcp_abort    = lpfc_nvme_fcp_abort,
1921
1922         .max_hw_queues = 1,
1923         .max_sgl_segments = LPFC_NVME_DEFAULT_SEGS,
1924         .max_dif_sgl_segments = LPFC_NVME_DEFAULT_SEGS,
1925         .dma_boundary = 0xFFFFFFFF,
1926
1927         /* Sizes of additional private data for data structures.
1928          * No use for the last two sizes at this time.
1929          */
1930         .local_priv_sz = sizeof(struct lpfc_nvme_lport),
1931         .remote_priv_sz = sizeof(struct lpfc_nvme_rport),
1932         .lsrqst_priv_sz = 0,
1933         .fcprqst_priv_sz = sizeof(struct lpfc_nvme_fcpreq_priv),
1934 };
1935
1936 /**
1937  * lpfc_get_nvme_buf - Get a nvme buffer from io_buf_list of the HBA
1938  * @phba: The HBA for which this call is being executed.
1939  *
1940  * This routine removes a nvme buffer from head of @hdwq io_buf_list
1941  * and returns to caller.
1942  *
1943  * Return codes:
1944  *   NULL - Error
1945  *   Pointer to lpfc_nvme_buf - Success
1946  **/
1947 static struct lpfc_io_buf *
1948 lpfc_get_nvme_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp,
1949                   int idx, int expedite)
1950 {
1951         struct lpfc_io_buf *lpfc_ncmd;
1952         struct lpfc_sli4_hdw_queue *qp;
1953         struct sli4_sge *sgl;
1954         struct lpfc_iocbq *pwqeq;
1955         union lpfc_wqe128 *wqe;
1956
1957         lpfc_ncmd = lpfc_get_io_buf(phba, NULL, idx, expedite);
1958
1959         if (lpfc_ncmd) {
1960                 pwqeq = &(lpfc_ncmd->cur_iocbq);
1961                 wqe = &pwqeq->wqe;
1962
1963                 /* Setup key fields in buffer that may have been changed
1964                  * if other protocols used this buffer.
1965                  */
1966                 pwqeq->iocb_flag = LPFC_IO_NVME;
1967                 pwqeq->wqe_cmpl = lpfc_nvme_io_cmd_wqe_cmpl;
1968                 lpfc_ncmd->start_time = jiffies;
1969                 lpfc_ncmd->flags = 0;
1970
1971                 /* Rsp SGE will be filled in when we rcv an IO
1972                  * from the NVME Layer to be sent.
1973                  * The cmd is going to be embedded so we need a SKIP SGE.
1974                  */
1975                 sgl = lpfc_ncmd->dma_sgl;
1976                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
1977                 bf_set(lpfc_sli4_sge_last, sgl, 0);
1978                 sgl->word2 = cpu_to_le32(sgl->word2);
1979                 /* Fill in word 3 / sgl_len during cmd submission */
1980
1981                 /* Initialize WQE */
1982                 memset(wqe, 0, sizeof(union lpfc_wqe));
1983
1984                 if (lpfc_ndlp_check_qdepth(phba, ndlp)) {
1985                         atomic_inc(&ndlp->cmd_pending);
1986                         lpfc_ncmd->flags |= LPFC_SBUF_BUMP_QDEPTH;
1987                 }
1988
1989         } else {
1990                 qp = &phba->sli4_hba.hdwq[idx];
1991                 qp->empty_io_bufs++;
1992         }
1993
1994         return  lpfc_ncmd;
1995 }
1996
1997 /**
1998  * lpfc_release_nvme_buf: Return a nvme buffer back to hba nvme buf list.
1999  * @phba: The Hba for which this call is being executed.
2000  * @lpfc_ncmd: The nvme buffer which is being released.
2001  *
2002  * This routine releases @lpfc_ncmd nvme buffer by adding it to tail of @phba
2003  * lpfc_io_buf_list list. For SLI4 XRI's are tied to the nvme buffer
2004  * and cannot be reused for at least RA_TOV amount of time if it was
2005  * aborted.
2006  **/
2007 static void
2008 lpfc_release_nvme_buf(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_ncmd)
2009 {
2010         struct lpfc_sli4_hdw_queue *qp;
2011         unsigned long iflag = 0;
2012
2013         if ((lpfc_ncmd->flags & LPFC_SBUF_BUMP_QDEPTH) && lpfc_ncmd->ndlp)
2014                 atomic_dec(&lpfc_ncmd->ndlp->cmd_pending);
2015
2016         lpfc_ncmd->ndlp = NULL;
2017         lpfc_ncmd->flags &= ~LPFC_SBUF_BUMP_QDEPTH;
2018
2019         qp = lpfc_ncmd->hdwq;
2020         if (lpfc_ncmd->flags & LPFC_SBUF_XBUSY) {
2021                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
2022                                 "6310 XB release deferred for "
2023                                 "ox_id x%x on reqtag x%x\n",
2024                                 lpfc_ncmd->cur_iocbq.sli4_xritag,
2025                                 lpfc_ncmd->cur_iocbq.iotag);
2026
2027                 spin_lock_irqsave(&qp->abts_nvme_buf_list_lock, iflag);
2028                 list_add_tail(&lpfc_ncmd->list,
2029                         &qp->lpfc_abts_nvme_buf_list);
2030                 qp->abts_nvme_io_bufs++;
2031                 spin_unlock_irqrestore(&qp->abts_nvme_buf_list_lock, iflag);
2032         } else
2033                 lpfc_release_io_buf(phba, (struct lpfc_io_buf *)lpfc_ncmd, qp);
2034 }
2035
2036 /**
2037  * lpfc_nvme_create_localport - Create/Bind an nvme localport instance.
2038  * @pvport - the lpfc_vport instance requesting a localport.
2039  *
2040  * This routine is invoked to create an nvme localport instance to bind
2041  * to the nvme_fc_transport.  It is called once during driver load
2042  * like lpfc_create_shost after all other services are initialized.
2043  * It requires a vport, vpi, and wwns at call time.  Other localport
2044  * parameters are modified as the driver's FCID and the Fabric WWN
2045  * are established.
2046  *
2047  * Return codes
2048  *      0 - successful
2049  *      -ENOMEM - no heap memory available
2050  *      other values - from nvme registration upcall
2051  **/
2052 int
2053 lpfc_nvme_create_localport(struct lpfc_vport *vport)
2054 {
2055         int ret = 0;
2056         struct lpfc_hba  *phba = vport->phba;
2057         struct nvme_fc_port_info nfcp_info;
2058         struct nvme_fc_local_port *localport;
2059         struct lpfc_nvme_lport *lport;
2060
2061         /* Initialize this localport instance.  The vport wwn usage ensures
2062          * that NPIV is accounted for.
2063          */
2064         memset(&nfcp_info, 0, sizeof(struct nvme_fc_port_info));
2065         nfcp_info.port_role = FC_PORT_ROLE_NVME_INITIATOR;
2066         nfcp_info.node_name = wwn_to_u64(vport->fc_nodename.u.wwn);
2067         nfcp_info.port_name = wwn_to_u64(vport->fc_portname.u.wwn);
2068
2069         /* We need to tell the transport layer + 1 because it takes page
2070          * alignment into account. When space for the SGL is allocated we
2071          * allocate + 3, one for cmd, one for rsp and one for this alignment
2072          */
2073         lpfc_nvme_template.max_sgl_segments = phba->cfg_nvme_seg_cnt + 1;
2074
2075         /* Advertise how many hw queues we support based on fcp_io_sched */
2076         if (phba->cfg_fcp_io_sched == LPFC_FCP_SCHED_BY_HDWQ)
2077                 lpfc_nvme_template.max_hw_queues = phba->cfg_hdw_queue;
2078         else
2079                 lpfc_nvme_template.max_hw_queues =
2080                         phba->sli4_hba.num_present_cpu;
2081
2082         /* localport is allocated from the stack, but the registration
2083          * call allocates heap memory as well as the private area.
2084          */
2085 #if (IS_ENABLED(CONFIG_NVME_FC))
2086         ret = nvme_fc_register_localport(&nfcp_info, &lpfc_nvme_template,
2087                                          &vport->phba->pcidev->dev, &localport);
2088 #else
2089         ret = -ENOMEM;
2090 #endif
2091         if (!ret) {
2092                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME | LOG_NVME_DISC,
2093                                  "6005 Successfully registered local "
2094                                  "NVME port num %d, localP %p, private %p, "
2095                                  "sg_seg %d\n",
2096                                  localport->port_num, localport,
2097                                  localport->private,
2098                                  lpfc_nvme_template.max_sgl_segments);
2099
2100                 /* Private is our lport size declared in the template. */
2101                 lport = (struct lpfc_nvme_lport *)localport->private;
2102                 vport->localport = localport;
2103                 lport->vport = vport;
2104                 vport->nvmei_support = 1;
2105
2106                 atomic_set(&lport->xmt_fcp_noxri, 0);
2107                 atomic_set(&lport->xmt_fcp_bad_ndlp, 0);
2108                 atomic_set(&lport->xmt_fcp_qdepth, 0);
2109                 atomic_set(&lport->xmt_fcp_err, 0);
2110                 atomic_set(&lport->xmt_fcp_wqerr, 0);
2111                 atomic_set(&lport->xmt_fcp_abort, 0);
2112                 atomic_set(&lport->xmt_ls_abort, 0);
2113                 atomic_set(&lport->xmt_ls_err, 0);
2114                 atomic_set(&lport->cmpl_fcp_xb, 0);
2115                 atomic_set(&lport->cmpl_fcp_err, 0);
2116                 atomic_set(&lport->cmpl_ls_xb, 0);
2117                 atomic_set(&lport->cmpl_ls_err, 0);
2118                 atomic_set(&lport->fc4NvmeLsRequests, 0);
2119                 atomic_set(&lport->fc4NvmeLsCmpls, 0);
2120         }
2121
2122         return ret;
2123 }
2124
2125 /* lpfc_nvme_lport_unreg_wait - Wait for the host to complete an lport unreg.
2126  *
2127  * The driver has to wait for the host nvme transport to callback
2128  * indicating the localport has successfully unregistered all
2129  * resources.  Since this is an uninterruptible wait, loop every ten
2130  * seconds and print a message indicating no progress.
2131  *
2132  * An uninterruptible wait is used because of the risk of transport-to-
2133  * driver state mismatch.
2134  */
2135 void
2136 lpfc_nvme_lport_unreg_wait(struct lpfc_vport *vport,
2137                            struct lpfc_nvme_lport *lport,
2138                            struct completion *lport_unreg_cmp)
2139 {
2140 #if (IS_ENABLED(CONFIG_NVME_FC))
2141         u32 wait_tmo;
2142         int ret;
2143
2144         /* Host transport has to clean up and confirm requiring an indefinite
2145          * wait. Print a message if a 10 second wait expires and renew the
2146          * wait. This is unexpected.
2147          */
2148         wait_tmo = msecs_to_jiffies(LPFC_NVME_WAIT_TMO * 1000);
2149         while (true) {
2150                 ret = wait_for_completion_timeout(lport_unreg_cmp, wait_tmo);
2151                 if (unlikely(!ret)) {
2152                         lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_IOERR,
2153                                          "6176 Lport %p Localport %p wait "
2154                                          "timed out. Renewing.\n",
2155                                          lport, vport->localport);
2156                         continue;
2157                 }
2158                 break;
2159         }
2160         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
2161                          "6177 Lport %p Localport %p Complete Success\n",
2162                          lport, vport->localport);
2163 #endif
2164 }
2165
2166 /**
2167  * lpfc_nvme_destroy_localport - Destroy lpfc_nvme bound to nvme transport.
2168  * @pnvme: pointer to lpfc nvme data structure.
2169  *
2170  * This routine is invoked to destroy all lports bound to the phba.
2171  * The lport memory was allocated by the nvme fc transport and is
2172  * released there.  This routine ensures all rports bound to the
2173  * lport have been disconnected.
2174  *
2175  **/
2176 void
2177 lpfc_nvme_destroy_localport(struct lpfc_vport *vport)
2178 {
2179 #if (IS_ENABLED(CONFIG_NVME_FC))
2180         struct nvme_fc_local_port *localport;
2181         struct lpfc_nvme_lport *lport;
2182         int ret;
2183         DECLARE_COMPLETION_ONSTACK(lport_unreg_cmp);
2184
2185         if (vport->nvmei_support == 0)
2186                 return;
2187
2188         localport = vport->localport;
2189         lport = (struct lpfc_nvme_lport *)localport->private;
2190
2191         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
2192                          "6011 Destroying NVME localport %p\n",
2193                          localport);
2194
2195         /* lport's rport list is clear.  Unregister
2196          * lport and release resources.
2197          */
2198         lport->lport_unreg_cmp = &lport_unreg_cmp;
2199         ret = nvme_fc_unregister_localport(localport);
2200
2201         /* Wait for completion.  This either blocks
2202          * indefinitely or succeeds
2203          */
2204         lpfc_nvme_lport_unreg_wait(vport, lport, &lport_unreg_cmp);
2205         vport->localport = NULL;
2206
2207         /* Regardless of the unregister upcall response, clear
2208          * nvmei_support.  All rports are unregistered and the
2209          * driver will clean up.
2210          */
2211         vport->nvmei_support = 0;
2212         if (ret == 0) {
2213                 lpfc_printf_vlog(vport,
2214                                  KERN_INFO, LOG_NVME_DISC,
2215                                  "6009 Unregistered lport Success\n");
2216         } else {
2217                 lpfc_printf_vlog(vport,
2218                                  KERN_INFO, LOG_NVME_DISC,
2219                                  "6010 Unregistered lport "
2220                                  "Failed, status x%x\n",
2221                                  ret);
2222         }
2223 #endif
2224 }
2225
2226 void
2227 lpfc_nvme_update_localport(struct lpfc_vport *vport)
2228 {
2229 #if (IS_ENABLED(CONFIG_NVME_FC))
2230         struct nvme_fc_local_port *localport;
2231         struct lpfc_nvme_lport *lport;
2232
2233         localport = vport->localport;
2234         if (!localport) {
2235                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_NVME,
2236                                  "6710 Update NVME fail. No localport\n");
2237                 return;
2238         }
2239         lport = (struct lpfc_nvme_lport *)localport->private;
2240         if (!lport) {
2241                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_NVME,
2242                                  "6171 Update NVME fail. localP %p, No lport\n",
2243                                  localport);
2244                 return;
2245         }
2246         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
2247                          "6012 Update NVME lport %p did x%x\n",
2248                          localport, vport->fc_myDID);
2249
2250         localport->port_id = vport->fc_myDID;
2251         if (localport->port_id == 0)
2252                 localport->port_role = FC_PORT_ROLE_NVME_DISCOVERY;
2253         else
2254                 localport->port_role = FC_PORT_ROLE_NVME_INITIATOR;
2255
2256         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
2257                          "6030 bound lport %p to DID x%06x\n",
2258                          lport, localport->port_id);
2259 #endif
2260 }
2261
2262 int
2263 lpfc_nvme_register_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
2264 {
2265 #if (IS_ENABLED(CONFIG_NVME_FC))
2266         int ret = 0;
2267         struct nvme_fc_local_port *localport;
2268         struct lpfc_nvme_lport *lport;
2269         struct lpfc_nvme_rport *rport;
2270         struct lpfc_nvme_rport *oldrport;
2271         struct nvme_fc_remote_port *remote_port;
2272         struct nvme_fc_port_info rpinfo;
2273         struct lpfc_nodelist *prev_ndlp = NULL;
2274
2275         lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_NVME_DISC,
2276                          "6006 Register NVME PORT. DID x%06x nlptype x%x\n",
2277                          ndlp->nlp_DID, ndlp->nlp_type);
2278
2279         localport = vport->localport;
2280         if (!localport)
2281                 return 0;
2282
2283         lport = (struct lpfc_nvme_lport *)localport->private;
2284
2285         /* NVME rports are not preserved across devloss.
2286          * Just register this instance.  Note, rpinfo->dev_loss_tmo
2287          * is left 0 to indicate accept transport defaults.  The
2288          * driver communicates port role capabilities consistent
2289          * with the PRLI response data.
2290          */
2291         memset(&rpinfo, 0, sizeof(struct nvme_fc_port_info));
2292         rpinfo.port_id = ndlp->nlp_DID;
2293         if (ndlp->nlp_type & NLP_NVME_TARGET)
2294                 rpinfo.port_role |= FC_PORT_ROLE_NVME_TARGET;
2295         if (ndlp->nlp_type & NLP_NVME_INITIATOR)
2296                 rpinfo.port_role |= FC_PORT_ROLE_NVME_INITIATOR;
2297
2298         if (ndlp->nlp_type & NLP_NVME_DISCOVERY)
2299                 rpinfo.port_role |= FC_PORT_ROLE_NVME_DISCOVERY;
2300
2301         rpinfo.port_name = wwn_to_u64(ndlp->nlp_portname.u.wwn);
2302         rpinfo.node_name = wwn_to_u64(ndlp->nlp_nodename.u.wwn);
2303
2304         spin_lock_irq(&vport->phba->hbalock);
2305         oldrport = lpfc_ndlp_get_nrport(ndlp);
2306         spin_unlock_irq(&vport->phba->hbalock);
2307         if (!oldrport)
2308                 lpfc_nlp_get(ndlp);
2309
2310         ret = nvme_fc_register_remoteport(localport, &rpinfo, &remote_port);
2311         if (!ret) {
2312                 /* If the ndlp already has an nrport, this is just
2313                  * a resume of the existing rport.  Else this is a
2314                  * new rport.
2315                  */
2316                 /* Guard against an unregister/reregister
2317                  * race that leaves the WAIT flag set.
2318                  */
2319                 spin_lock_irq(&vport->phba->hbalock);
2320                 ndlp->upcall_flags &= ~NLP_WAIT_FOR_UNREG;
2321                 spin_unlock_irq(&vport->phba->hbalock);
2322                 rport = remote_port->private;
2323                 if (oldrport) {
2324                         /* New remoteport record does not guarantee valid
2325                          * host private memory area.
2326                          */
2327                         prev_ndlp = oldrport->ndlp;
2328                         if (oldrport == remote_port->private) {
2329                                 /* Same remoteport - ndlp should match.
2330                                  * Just reuse.
2331                                  */
2332                                 lpfc_printf_vlog(ndlp->vport, KERN_INFO,
2333                                                  LOG_NVME_DISC,
2334                                                  "6014 Rebinding lport to "
2335                                                  "remoteport %p wwpn 0x%llx, "
2336                                                  "Data: x%x x%x %p %p x%x x%06x\n",
2337                                                  remote_port,
2338                                                  remote_port->port_name,
2339                                                  remote_port->port_id,
2340                                                  remote_port->port_role,
2341                                                  prev_ndlp,
2342                                                  ndlp,
2343                                                  ndlp->nlp_type,
2344                                                  ndlp->nlp_DID);
2345                                 return 0;
2346                         }
2347
2348                         /* Sever the ndlp<->rport association
2349                          * before dropping the ndlp ref from
2350                          * register.
2351                          */
2352                         spin_lock_irq(&vport->phba->hbalock);
2353                         ndlp->nrport = NULL;
2354                         ndlp->upcall_flags &= ~NLP_WAIT_FOR_UNREG;
2355                         spin_unlock_irq(&vport->phba->hbalock);
2356                         rport->ndlp = NULL;
2357                         rport->remoteport = NULL;
2358
2359                         /* Reference only removed if previous NDLP is no longer
2360                          * active. It might be just a swap and removing the
2361                          * reference would cause a premature cleanup.
2362                          */
2363                         if (prev_ndlp && prev_ndlp != ndlp) {
2364                                 if ((!NLP_CHK_NODE_ACT(prev_ndlp)) ||
2365                                     (!prev_ndlp->nrport))
2366                                         lpfc_nlp_put(prev_ndlp);
2367                         }
2368                 }
2369
2370                 /* Clean bind the rport to the ndlp. */
2371                 rport->remoteport = remote_port;
2372                 rport->lport = lport;
2373                 rport->ndlp = ndlp;
2374                 spin_lock_irq(&vport->phba->hbalock);
2375                 ndlp->nrport = rport;
2376                 spin_unlock_irq(&vport->phba->hbalock);
2377                 lpfc_printf_vlog(vport, KERN_INFO,
2378                                  LOG_NVME_DISC | LOG_NODE,
2379                                  "6022 Binding new rport to "
2380                                  "lport %p Remoteport %p rport %p WWNN 0x%llx, "
2381                                  "Rport WWPN 0x%llx DID "
2382                                  "x%06x Role x%x, ndlp %p prev_ndlp %p\n",
2383                                  lport, remote_port, rport,
2384                                  rpinfo.node_name, rpinfo.port_name,
2385                                  rpinfo.port_id, rpinfo.port_role,
2386                                  ndlp, prev_ndlp);
2387         } else {
2388                 lpfc_printf_vlog(vport, KERN_ERR,
2389                                  LOG_NVME_DISC | LOG_NODE,
2390                                  "6031 RemotePort Registration failed "
2391                                  "err: %d, DID x%06x\n",
2392                                  ret, ndlp->nlp_DID);
2393         }
2394
2395         return ret;
2396 #else
2397         return 0;
2398 #endif
2399 }
2400
2401 /* lpfc_nvme_unregister_port - unbind the DID and port_role from this rport.
2402  *
2403  * There is no notion of Devloss or rport recovery from the current
2404  * nvme_transport perspective.  Loss of an rport just means IO cannot
2405  * be sent and recovery is completely up to the initator.
2406  * For now, the driver just unbinds the DID and port_role so that
2407  * no further IO can be issued.  Changes are planned for later.
2408  *
2409  * Notes - the ndlp reference count is not decremented here since
2410  * since there is no nvme_transport api for devloss.  Node ref count
2411  * is only adjusted in driver unload.
2412  */
2413 void
2414 lpfc_nvme_unregister_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
2415 {
2416 #if (IS_ENABLED(CONFIG_NVME_FC))
2417         int ret;
2418         struct nvme_fc_local_port *localport;
2419         struct lpfc_nvme_lport *lport;
2420         struct lpfc_nvme_rport *rport;
2421         struct nvme_fc_remote_port *remoteport = NULL;
2422
2423         localport = vport->localport;
2424
2425         /* This is fundamental error.  The localport is always
2426          * available until driver unload.  Just exit.
2427          */
2428         if (!localport)
2429                 return;
2430
2431         lport = (struct lpfc_nvme_lport *)localport->private;
2432         if (!lport)
2433                 goto input_err;
2434
2435         spin_lock_irq(&vport->phba->hbalock);
2436         rport = lpfc_ndlp_get_nrport(ndlp);
2437         if (rport)
2438                 remoteport = rport->remoteport;
2439         spin_unlock_irq(&vport->phba->hbalock);
2440         if (!remoteport)
2441                 goto input_err;
2442
2443         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
2444                          "6033 Unreg nvme remoteport %p, portname x%llx, "
2445                          "port_id x%06x, portstate x%x port type x%x\n",
2446                          remoteport, remoteport->port_name,
2447                          remoteport->port_id, remoteport->port_state,
2448                          ndlp->nlp_type);
2449
2450         /* Sanity check ndlp type.  Only call for NVME ports. Don't
2451          * clear any rport state until the transport calls back.
2452          */
2453
2454         if (ndlp->nlp_type & NLP_NVME_TARGET) {
2455                 /* No concern about the role change on the nvme remoteport.
2456                  * The transport will update it.
2457                  */
2458                 ndlp->upcall_flags |= NLP_WAIT_FOR_UNREG;
2459
2460                 /* Don't let the host nvme transport keep sending keep-alives
2461                  * on this remoteport. Vport is unloading, no recovery. The
2462                  * return values is ignored.  The upcall is a courtesy to the
2463                  * transport.
2464                  */
2465                 if (vport->load_flag & FC_UNLOADING)
2466                         (void)nvme_fc_set_remoteport_devloss(remoteport, 0);
2467
2468                 ret = nvme_fc_unregister_remoteport(remoteport);
2469                 if (ret != 0) {
2470                         lpfc_nlp_put(ndlp);
2471                         lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
2472                                          "6167 NVME unregister failed %d "
2473                                          "port_state x%x\n",
2474                                          ret, remoteport->port_state);
2475                 }
2476         }
2477         return;
2478
2479  input_err:
2480 #endif
2481         lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
2482                          "6168 State error: lport %p, rport%p FCID x%06x\n",
2483                          vport->localport, ndlp->rport, ndlp->nlp_DID);
2484 }
2485
2486 /**
2487  * lpfc_sli4_nvme_xri_aborted - Fast-path process of NVME xri abort
2488  * @phba: pointer to lpfc hba data structure.
2489  * @axri: pointer to the fcp xri abort wcqe structure.
2490  *
2491  * This routine is invoked by the worker thread to process a SLI4 fast-path
2492  * NVME aborted xri.  Aborted NVME IO commands are completed to the transport
2493  * here.
2494  **/
2495 void
2496 lpfc_sli4_nvme_xri_aborted(struct lpfc_hba *phba,
2497                            struct sli4_wcqe_xri_aborted *axri, int idx)
2498 {
2499         uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
2500         struct lpfc_io_buf *lpfc_ncmd, *next_lpfc_ncmd;
2501         struct nvmefc_fcp_req *nvme_cmd = NULL;
2502         struct lpfc_nodelist *ndlp;
2503         struct lpfc_sli4_hdw_queue *qp;
2504         unsigned long iflag = 0;
2505
2506         if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_NVME))
2507                 return;
2508         qp = &phba->sli4_hba.hdwq[idx];
2509         spin_lock_irqsave(&phba->hbalock, iflag);
2510         spin_lock(&qp->abts_nvme_buf_list_lock);
2511         list_for_each_entry_safe(lpfc_ncmd, next_lpfc_ncmd,
2512                                  &qp->lpfc_abts_nvme_buf_list, list) {
2513                 if (lpfc_ncmd->cur_iocbq.sli4_xritag == xri) {
2514                         list_del_init(&lpfc_ncmd->list);
2515                         qp->abts_nvme_io_bufs--;
2516                         lpfc_ncmd->flags &= ~LPFC_SBUF_XBUSY;
2517                         lpfc_ncmd->status = IOSTAT_SUCCESS;
2518                         spin_unlock(&qp->abts_nvme_buf_list_lock);
2519
2520                         spin_unlock_irqrestore(&phba->hbalock, iflag);
2521                         ndlp = lpfc_ncmd->ndlp;
2522                         if (ndlp)
2523                                 lpfc_sli4_abts_err_handler(phba, ndlp, axri);
2524
2525                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
2526                                         "6311 nvme_cmd %p xri x%x tag x%x "
2527                                         "abort complete and xri released\n",
2528                                         lpfc_ncmd->nvmeCmd, xri,
2529                                         lpfc_ncmd->cur_iocbq.iotag);
2530
2531                         /* Aborted NVME commands are required to not complete
2532                          * before the abort exchange command fully completes.
2533                          * Once completed, it is available via the put list.
2534                          */
2535                         if (lpfc_ncmd->nvmeCmd) {
2536                                 nvme_cmd = lpfc_ncmd->nvmeCmd;
2537                                 nvme_cmd->done(nvme_cmd);
2538                                 lpfc_ncmd->nvmeCmd = NULL;
2539                         }
2540                         lpfc_release_nvme_buf(phba, lpfc_ncmd);
2541                         return;
2542                 }
2543         }
2544         spin_unlock(&qp->abts_nvme_buf_list_lock);
2545         spin_unlock_irqrestore(&phba->hbalock, iflag);
2546
2547         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
2548                         "6312 XRI Aborted xri x%x not found\n", xri);
2549
2550 }
2551
2552 /**
2553  * lpfc_nvme_wait_for_io_drain - Wait for all NVME wqes to complete
2554  * @phba: Pointer to HBA context object.
2555  *
2556  * This function flushes all wqes in the nvme rings and frees all resources
2557  * in the txcmplq. This function does not issue abort wqes for the IO
2558  * commands in txcmplq, they will just be returned with
2559  * IOERR_SLI_DOWN. This function is invoked with EEH when device's PCI
2560  * slot has been permanently disabled.
2561  **/
2562 void
2563 lpfc_nvme_wait_for_io_drain(struct lpfc_hba *phba)
2564 {
2565         struct lpfc_sli_ring  *pring;
2566         u32 i, wait_cnt = 0;
2567
2568         if (phba->sli_rev < LPFC_SLI_REV4 || !phba->sli4_hba.hdwq)
2569                 return;
2570
2571         /* Cycle through all NVME rings and make sure all outstanding
2572          * WQEs have been removed from the txcmplqs.
2573          */
2574         for (i = 0; i < phba->cfg_hdw_queue; i++) {
2575                 if (!phba->sli4_hba.hdwq[i].nvme_wq)
2576                         continue;
2577                 pring = phba->sli4_hba.hdwq[i].nvme_wq->pring;
2578
2579                 if (!pring)
2580                         continue;
2581
2582                 /* Retrieve everything on the txcmplq */
2583                 while (!list_empty(&pring->txcmplq)) {
2584                         msleep(LPFC_XRI_EXCH_BUSY_WAIT_T1);
2585                         wait_cnt++;
2586
2587                         /* The sleep is 10mS.  Every ten seconds,
2588                          * dump a message.  Something is wrong.
2589                          */
2590                         if ((wait_cnt % 1000) == 0) {
2591                                 lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
2592                                                 "6178 NVME IO not empty, "
2593                                                 "cnt %d\n", wait_cnt);
2594                         }
2595                 }
2596         }
2597 }