drivers/scsi/lpfc/lpfc_nvmet.c

   1 /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Fibre Channel Host Bus Adapters.                                *
   4  * Copyright (C) 2017-2024 Broadcom. All Rights Reserved. The term *
   5  * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.     *
   6  * Copyright (C) 2004-2016 Emulex.  All rights reserved.           *
   7  * EMULEX and SLI are trademarks of Emulex.                        *
   8  * www.broadcom.com                                                *
   9  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
  10  *                                                                 *
  11  * This program is free software; you can redistribute it and/or   *
  12  * modify it under the terms of version 2 of the GNU General       *
  13  * Public License as published by the Free Software Foundation.    *
  14  * This program is distributed in the hope that it will be useful. *
  15  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  16  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  17  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  18  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  19  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  20  * more details, a copy of which can be found in the file COPYING  *
  21  * included with this package.                                     *
  22  ********************************************************************/
  23 #include <linux/pci.h>
  24 #include <linux/slab.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/delay.h>
  27 #include <linux/unaligned.h>
  28 #include <linux/crc-t10dif.h>
  29 #include <net/checksum.h>
  30
  31 #include <scsi/scsi.h>
  32 #include <scsi/scsi_device.h>
  33 #include <scsi/scsi_eh.h>
  34 #include <scsi/scsi_host.h>
  35 #include <scsi/scsi_tcq.h>
  36 #include <scsi/scsi_transport_fc.h>
  37 #include <scsi/fc/fc_fs.h>
  38
  39 #include "lpfc_version.h"
  40 #include "lpfc_hw4.h"
  41 #include "lpfc_hw.h"
  42 #include "lpfc_sli.h"
  43 #include "lpfc_sli4.h"
  44 #include "lpfc_nl.h"
  45 #include "lpfc_disc.h"
  46 #include "lpfc.h"
  47 #include "lpfc_scsi.h"
  48 #include "lpfc_nvme.h"
  49 #include "lpfc_logmsg.h"
  50 #include "lpfc_crtn.h"
  51 #include "lpfc_vport.h"
  52 #include "lpfc_debugfs.h"
  53
  54 static struct lpfc_iocbq *lpfc_nvmet_prep_ls_wqe(struct lpfc_hba *,
  55                                                  struct lpfc_async_xchg_ctx *,
  56                                                  dma_addr_t rspbuf,
  57                                                  uint16_t rspsize);
  58 static struct lpfc_iocbq *lpfc_nvmet_prep_fcp_wqe(struct lpfc_hba *,
  59                                                   struct lpfc_async_xchg_ctx *);
  60 static int lpfc_nvmet_sol_fcp_issue_abort(struct lpfc_hba *,
  61                                           struct lpfc_async_xchg_ctx *,
  62                                           uint32_t, uint16_t);
  63 static int lpfc_nvmet_unsol_fcp_issue_abort(struct lpfc_hba *,
  64                                             struct lpfc_async_xchg_ctx *,
  65                                             uint32_t, uint16_t);
  66 static void lpfc_nvmet_wqfull_flush(struct lpfc_hba *, struct lpfc_queue *,
  67                                     struct lpfc_async_xchg_ctx *);
  68 static void lpfc_nvmet_fcp_rqst_defer_work(struct work_struct *);
  69
  70 static void lpfc_nvmet_process_rcv_fcp_req(struct lpfc_nvmet_ctxbuf *ctx_buf);
  71
  72 static union lpfc_wqe128 lpfc_tsend_cmd_template;
  73 static union lpfc_wqe128 lpfc_treceive_cmd_template;
  74 static union lpfc_wqe128 lpfc_trsp_cmd_template;
  75
  76 /* Setup WQE templates for NVME IOs */
  77 void
  78 lpfc_nvmet_cmd_template(void)
  79 {
  80         union lpfc_wqe128 *wqe;
  81
  82         /* TSEND template */
  83         wqe = &lpfc_tsend_cmd_template;
  84         memset(wqe, 0, sizeof(union lpfc_wqe128));
  85
  86         /* Word 0, 1, 2 - BDE is variable */
  87
  88         /* Word 3 - payload_offset_len is zero */
  89
  90         /* Word 4 - relative_offset is variable */
  91
  92         /* Word 5 - is zero */
  93
  94         /* Word 6 - ctxt_tag, xri_tag is variable */
  95
  96         /* Word 7 - wqe_ar is variable */
  97         bf_set(wqe_cmnd, &wqe->fcp_tsend.wqe_com, CMD_FCP_TSEND64_WQE);
  98         bf_set(wqe_pu, &wqe->fcp_tsend.wqe_com, PARM_REL_OFF);
  99         bf_set(wqe_class, &wqe->fcp_tsend.wqe_com, CLASS3);
 100         bf_set(wqe_ct, &wqe->fcp_tsend.wqe_com, SLI4_CT_RPI);
 101         bf_set(wqe_ar, &wqe->fcp_tsend.wqe_com, 1);
 102
 103         /* Word 8 - abort_tag is variable */
 104
 105         /* Word 9  - reqtag, rcvoxid is variable */
 106
 107         /* Word 10 - wqes, xc is variable */
 108         bf_set(wqe_xchg, &wqe->fcp_tsend.wqe_com, LPFC_NVME_XCHG);
 109         bf_set(wqe_dbde, &wqe->fcp_tsend.wqe_com, 1);
 110         bf_set(wqe_wqes, &wqe->fcp_tsend.wqe_com, 0);
 111         bf_set(wqe_xc, &wqe->fcp_tsend.wqe_com, 1);
 112         bf_set(wqe_iod, &wqe->fcp_tsend.wqe_com, LPFC_WQE_IOD_WRITE);
 113         bf_set(wqe_lenloc, &wqe->fcp_tsend.wqe_com, LPFC_WQE_LENLOC_WORD12);
 114
 115         /* Word 11 - sup, irsp, irsplen is variable */
 116         bf_set(wqe_cmd_type, &wqe->fcp_tsend.wqe_com, FCP_COMMAND_TSEND);
 117         bf_set(wqe_cqid, &wqe->fcp_tsend.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
 118         bf_set(wqe_sup, &wqe->fcp_tsend.wqe_com, 0);
 119         bf_set(wqe_irsp, &wqe->fcp_tsend.wqe_com, 0);
 120         bf_set(wqe_irsplen, &wqe->fcp_tsend.wqe_com, 0);
 121         bf_set(wqe_pbde, &wqe->fcp_tsend.wqe_com, 0);
 122
 123         /* Word 12 - fcp_data_len is variable */
 124
 125         /* Word 13, 14, 15 - PBDE is zero */
 126
 127         /* TRECEIVE template */
 128         wqe = &lpfc_treceive_cmd_template;
 129         memset(wqe, 0, sizeof(union lpfc_wqe128));
 130
 131         /* Word 0, 1, 2 - BDE is variable */
 132
 133         /* Word 3 */
 134         wqe->fcp_treceive.payload_offset_len = TXRDY_PAYLOAD_LEN;
 135
 136         /* Word 4 - relative_offset is variable */
 137
 138         /* Word 5 - is zero */
 139
 140         /* Word 6 - ctxt_tag, xri_tag is variable */
 141
 142         /* Word 7 */
 143         bf_set(wqe_cmnd, &wqe->fcp_treceive.wqe_com, CMD_FCP_TRECEIVE64_WQE);
 144         bf_set(wqe_pu, &wqe->fcp_treceive.wqe_com, PARM_REL_OFF);
 145         bf_set(wqe_class, &wqe->fcp_treceive.wqe_com, CLASS3);
 146         bf_set(wqe_ct, &wqe->fcp_treceive.wqe_com, SLI4_CT_RPI);
 147         bf_set(wqe_ar, &wqe->fcp_treceive.wqe_com, 0);
 148
 149         /* Word 8 - abort_tag is variable */
 150
 151         /* Word 9  - reqtag, rcvoxid is variable */
 152
 153         /* Word 10 - xc is variable */
 154         bf_set(wqe_dbde, &wqe->fcp_treceive.wqe_com, 1);
 155         bf_set(wqe_wqes, &wqe->fcp_treceive.wqe_com, 0);
 156         bf_set(wqe_xchg, &wqe->fcp_treceive.wqe_com, LPFC_NVME_XCHG);
 157         bf_set(wqe_iod, &wqe->fcp_treceive.wqe_com, LPFC_WQE_IOD_READ);
 158         bf_set(wqe_lenloc, &wqe->fcp_treceive.wqe_com, LPFC_WQE_LENLOC_WORD12);
 159         bf_set(wqe_xc, &wqe->fcp_tsend.wqe_com, 1);
 160
 161         /* Word 11 - pbde is variable */
 162         bf_set(wqe_cmd_type, &wqe->fcp_treceive.wqe_com, FCP_COMMAND_TRECEIVE);
 163         bf_set(wqe_cqid, &wqe->fcp_treceive.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
 164         bf_set(wqe_sup, &wqe->fcp_treceive.wqe_com, 0);
 165         bf_set(wqe_irsp, &wqe->fcp_treceive.wqe_com, 0);
 166         bf_set(wqe_irsplen, &wqe->fcp_treceive.wqe_com, 0);
 167         bf_set(wqe_pbde, &wqe->fcp_treceive.wqe_com, 1);
 168
 169         /* Word 12 - fcp_data_len is variable */
 170
 171         /* Word 13, 14, 15 - PBDE is variable */
 172
 173         /* TRSP template */
 174         wqe = &lpfc_trsp_cmd_template;
 175         memset(wqe, 0, sizeof(union lpfc_wqe128));
 176
 177         /* Word 0, 1, 2 - BDE is variable */
 178
 179         /* Word 3 - response_len is variable */
 180
 181         /* Word 4, 5 - is zero */
 182
 183         /* Word 6 - ctxt_tag, xri_tag is variable */
 184
 185         /* Word 7 */
 186         bf_set(wqe_cmnd, &wqe->fcp_trsp.wqe_com, CMD_FCP_TRSP64_WQE);
 187         bf_set(wqe_pu, &wqe->fcp_trsp.wqe_com, PARM_UNUSED);
 188         bf_set(wqe_class, &wqe->fcp_trsp.wqe_com, CLASS3);
 189         bf_set(wqe_ct, &wqe->fcp_trsp.wqe_com, SLI4_CT_RPI);
 190         bf_set(wqe_ag, &wqe->fcp_trsp.wqe_com, 1); /* wqe_ar */
 191
 192         /* Word 8 - abort_tag is variable */
 193
 194         /* Word 9  - reqtag is variable */
 195
 196         /* Word 10 wqes, xc is variable */
 197         bf_set(wqe_dbde, &wqe->fcp_trsp.wqe_com, 1);
 198         bf_set(wqe_xchg, &wqe->fcp_trsp.wqe_com, LPFC_NVME_XCHG);
 199         bf_set(wqe_wqes, &wqe->fcp_trsp.wqe_com, 0);
 200         bf_set(wqe_xc, &wqe->fcp_trsp.wqe_com, 0);
 201         bf_set(wqe_iod, &wqe->fcp_trsp.wqe_com, LPFC_WQE_IOD_NONE);
 202         bf_set(wqe_lenloc, &wqe->fcp_trsp.wqe_com, LPFC_WQE_LENLOC_WORD3);
 203
 204         /* Word 11 irsp, irsplen is variable */
 205         bf_set(wqe_cmd_type, &wqe->fcp_trsp.wqe_com, FCP_COMMAND_TRSP);
 206         bf_set(wqe_cqid, &wqe->fcp_trsp.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
 207         bf_set(wqe_sup, &wqe->fcp_trsp.wqe_com, 0);
 208         bf_set(wqe_irsp, &wqe->fcp_trsp.wqe_com, 0);
 209         bf_set(wqe_irsplen, &wqe->fcp_trsp.wqe_com, 0);
 210         bf_set(wqe_pbde, &wqe->fcp_trsp.wqe_com, 0);
 211
 212         /* Word 12, 13, 14, 15 - is zero */
 213 }
 214
 215 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
 216 static struct lpfc_async_xchg_ctx *
 217 lpfc_nvmet_get_ctx_for_xri(struct lpfc_hba *phba, u16 xri)
 218 {
 219         struct lpfc_async_xchg_ctx *ctxp;
 220         unsigned long iflag;
 221         bool found = false;
 222
 223         spin_lock_irqsave(&phba->sli4_hba.t_active_list_lock, iflag);
 224         list_for_each_entry(ctxp, &phba->sli4_hba.t_active_ctx_list, list) {
 225                 if (ctxp->ctxbuf->sglq->sli4_xritag != xri)
 226                         continue;
 227
 228                 found = true;
 229                 break;
 230         }
 231         spin_unlock_irqrestore(&phba->sli4_hba.t_active_list_lock, iflag);
 232         if (found)
 233                 return ctxp;
 234
 235         return NULL;
 236 }
 237
 238 static struct lpfc_async_xchg_ctx *
 239 lpfc_nvmet_get_ctx_for_oxid(struct lpfc_hba *phba, u16 oxid, u32 sid)
 240 {
 241         struct lpfc_async_xchg_ctx *ctxp;
 242         unsigned long iflag;
 243         bool found = false;
 244
 245         spin_lock_irqsave(&phba->sli4_hba.t_active_list_lock, iflag);
 246         list_for_each_entry(ctxp, &phba->sli4_hba.t_active_ctx_list, list) {
 247                 if (ctxp->oxid != oxid || ctxp->sid != sid)
 248                         continue;
 249
 250                 found = true;
 251                 break;
 252         }
 253         spin_unlock_irqrestore(&phba->sli4_hba.t_active_list_lock, iflag);
 254         if (found)
 255                 return ctxp;
 256
 257         return NULL;
 258 }
 259 #endif
 260
 261 static void
 262 lpfc_nvmet_defer_release(struct lpfc_hba *phba,
 263                         struct lpfc_async_xchg_ctx *ctxp)
 264 {
 265         lockdep_assert_held(&ctxp->ctxlock);
 266
 267         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
 268                         "6313 NVMET Defer ctx release oxid x%x flg x%x\n",
 269                         ctxp->oxid, ctxp->flag);
 270
 271         if (ctxp->flag & LPFC_NVME_CTX_RLS)
 272                 return;
 273
 274         ctxp->flag |= LPFC_NVME_CTX_RLS;
 275         spin_lock(&phba->sli4_hba.t_active_list_lock);
 276         list_del(&ctxp->list);
 277         spin_unlock(&phba->sli4_hba.t_active_list_lock);
 278         spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
 279         list_add_tail(&ctxp->list, &phba->sli4_hba.lpfc_abts_nvmet_ctx_list);
 280         spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
 281 }
 282
 283 /**
 284  * __lpfc_nvme_xmt_ls_rsp_cmp - Generic completion handler for the
 285  *         transmission of an NVME LS response.
 286  * @phba: Pointer to HBA context object.
 287  * @cmdwqe: Pointer to driver command WQE object.
 288  * @rspwqe: Pointer to driver response WQE object.
 289  *
 290  * The function is called from SLI ring event handler with no
 291  * lock held. The function frees memory resources used for the command
 292  * used to send the NVME LS RSP.
 293  **/
 294 void
 295 __lpfc_nvme_xmt_ls_rsp_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
 296                            struct lpfc_iocbq *rspwqe)
 297 {
 298         struct lpfc_async_xchg_ctx *axchg = cmdwqe->context_un.axchg;
 299         struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
 300         struct nvmefc_ls_rsp *ls_rsp = &axchg->ls_rsp;
 301         uint32_t status, result;
 302
 303         status = bf_get(lpfc_wcqe_c_status, wcqe);
 304         result = wcqe->parameter;
 305
 306         if (axchg->state != LPFC_NVME_STE_LS_RSP || axchg->entry_cnt != 2) {
 307                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 308                                 "6410 NVMEx LS cmpl state mismatch IO x%x: "
 309                                 "%d %d\n",
 310                                 axchg->oxid, axchg->state, axchg->entry_cnt);
 311         }
 312
 313         lpfc_nvmeio_data(phba, "NVMEx LS  CMPL: xri x%x stat x%x result x%x\n",
 314                          axchg->oxid, status, result);
 315
 316         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
 317                         "6038 NVMEx LS rsp cmpl: %d %d oxid x%x\n",
 318                         status, result, axchg->oxid);
 319
 320         lpfc_nlp_put(cmdwqe->ndlp);
 321         cmdwqe->context_un.axchg = NULL;
 322         cmdwqe->bpl_dmabuf = NULL;
 323         lpfc_sli_release_iocbq(phba, cmdwqe);
 324         ls_rsp->done(ls_rsp);
 325         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
 326                         "6200 NVMEx LS rsp cmpl done status %d oxid x%x\n",
 327                         status, axchg->oxid);
 328         kfree(axchg);
 329 }
 330
 331 /**
 332  * lpfc_nvmet_xmt_ls_rsp_cmp - Completion handler for LS Response
 333  * @phba: Pointer to HBA context object.
 334  * @cmdwqe: Pointer to driver command WQE object.
 335  * @rspwqe: Pointer to driver response WQE object.
 336  *
 337  * The function is called from SLI ring event handler with no
 338  * lock held. This function is the completion handler for NVME LS commands
 339  * The function updates any states and statistics, then calls the
 340  * generic completion handler to free resources.
 341  **/
 342 static void
 343 lpfc_nvmet_xmt_ls_rsp_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
 344                           struct lpfc_iocbq *rspwqe)
 345 {
 346         struct lpfc_nvmet_tgtport *tgtp;
 347         uint32_t status, result;
 348         struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
 349
 350         if (!phba->targetport)
 351                 goto finish;
 352
 353         status = bf_get(lpfc_wcqe_c_status, wcqe);
 354         result = wcqe->parameter;
 355
 356         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
 357         if (tgtp) {
 358                 if (status) {
 359                         atomic_inc(&tgtp->xmt_ls_rsp_error);
 360                         if (result == IOERR_ABORT_REQUESTED)
 361                                 atomic_inc(&tgtp->xmt_ls_rsp_aborted);
 362                         if (bf_get(lpfc_wcqe_c_xb, wcqe))
 363                                 atomic_inc(&tgtp->xmt_ls_rsp_xb_set);
 364                 } else {
 365                         atomic_inc(&tgtp->xmt_ls_rsp_cmpl);
 366                 }
 367         }
 368
 369 finish:
 370         __lpfc_nvme_xmt_ls_rsp_cmp(phba, cmdwqe, rspwqe);
 371 }
 372
 373 /**
 374  * lpfc_nvmet_ctxbuf_post - Repost a NVMET RQ DMA buffer and clean up context
 375  * @phba: HBA buffer is associated with
 376  * @ctx_buf: ctx buffer context
 377  *
 378  * Description: Frees the given DMA buffer in the appropriate way given by
 379  * reposting it to its associated RQ so it can be reused.
 380  *
 381  * Notes: Takes phba->hbalock.  Can be called with or without other locks held.
 382  *
 383  * Returns: None
 384  **/
 385 void
 386 lpfc_nvmet_ctxbuf_post(struct lpfc_hba *phba, struct lpfc_nvmet_ctxbuf *ctx_buf)
 387 {
 388 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
 389         struct lpfc_async_xchg_ctx *ctxp = ctx_buf->context;
 390         struct lpfc_nvmet_tgtport *tgtp;
 391         struct fc_frame_header *fc_hdr;
 392         struct rqb_dmabuf *nvmebuf;
 393         struct lpfc_nvmet_ctx_info *infop;
 394         uint32_t size, oxid, sid;
 395         int cpu;
 396         unsigned long iflag;
 397
 398         if (ctxp->state == LPFC_NVME_STE_FREE) {
 399                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 400                                 "6411 NVMET free, already free IO x%x: %d %d\n",
 401                                 ctxp->oxid, ctxp->state, ctxp->entry_cnt);
 402         }
 403
 404         if (ctxp->rqb_buffer) {
 405                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
 406                 nvmebuf = ctxp->rqb_buffer;
 407                 /* check if freed in another path whilst acquiring lock */
 408                 if (nvmebuf) {
 409                         ctxp->rqb_buffer = NULL;
 410                         if (ctxp->flag & LPFC_NVME_CTX_REUSE_WQ) {
 411                                 ctxp->flag &= ~LPFC_NVME_CTX_REUSE_WQ;
 412                                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
 413                                 nvmebuf->hrq->rqbp->rqb_free_buffer(phba,
 414                                                                     nvmebuf);
 415                         } else {
 416                                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
 417                                 /* repost */
 418                                 lpfc_rq_buf_free(phba, &nvmebuf->hbuf);
 419                         }
 420                 } else {
 421                         spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
 422                 }
 423         }
 424         ctxp->state = LPFC_NVME_STE_FREE;
 425
 426         spin_lock_irqsave(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
 427         if (phba->sli4_hba.nvmet_io_wait_cnt) {
 428                 list_remove_head(&phba->sli4_hba.lpfc_nvmet_io_wait_list,
 429                                  nvmebuf, struct rqb_dmabuf,
 430                                  hbuf.list);
 431                 phba->sli4_hba.nvmet_io_wait_cnt--;
 432                 spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock,
 433                                        iflag);
 434
 435                 fc_hdr = (struct fc_frame_header *)(nvmebuf->hbuf.virt);
 436                 oxid = be16_to_cpu(fc_hdr->fh_ox_id);
 437                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
 438                 size = nvmebuf->bytes_recv;
 439                 sid = sli4_sid_from_fc_hdr(fc_hdr);
 440
 441                 ctxp = (struct lpfc_async_xchg_ctx *)ctx_buf->context;
 442                 ctxp->wqeq = NULL;
 443                 ctxp->offset = 0;
 444                 ctxp->phba = phba;
 445                 ctxp->size = size;
 446                 ctxp->oxid = oxid;
 447                 ctxp->sid = sid;
 448                 ctxp->state = LPFC_NVME_STE_RCV;
 449                 ctxp->entry_cnt = 1;
 450                 ctxp->flag = 0;
 451                 ctxp->ctxbuf = ctx_buf;
 452                 ctxp->rqb_buffer = (void *)nvmebuf;
 453                 spin_lock_init(&ctxp->ctxlock);
 454
 455 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 456                 /* NOTE: isr time stamp is stale when context is re-assigned*/
 457                 if (ctxp->ts_isr_cmd) {
 458                         ctxp->ts_cmd_nvme = 0;
 459                         ctxp->ts_nvme_data = 0;
 460                         ctxp->ts_data_wqput = 0;
 461                         ctxp->ts_isr_data = 0;
 462                         ctxp->ts_data_nvme = 0;
 463                         ctxp->ts_nvme_status = 0;
 464                         ctxp->ts_status_wqput = 0;
 465                         ctxp->ts_isr_status = 0;
 466                         ctxp->ts_status_nvme = 0;
 467                 }
 468 #endif
 469                 atomic_inc(&tgtp->rcv_fcp_cmd_in);
 470
 471                 /* Indicate that a replacement buffer has been posted */
 472                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
 473                 ctxp->flag |= LPFC_NVME_CTX_REUSE_WQ;
 474                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
 475
 476                 if (!queue_work(phba->wq, &ctx_buf->defer_work)) {
 477                         atomic_inc(&tgtp->rcv_fcp_cmd_drop);
 478                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 479                                         "6181 Unable to queue deferred work "
 480                                         "for oxid x%x. "
 481                                         "FCP Drop IO [x%x x%x x%x]\n",
 482                                         ctxp->oxid,
 483                                         atomic_read(&tgtp->rcv_fcp_cmd_in),
 484                                         atomic_read(&tgtp->rcv_fcp_cmd_out),
 485                                         atomic_read(&tgtp->xmt_fcp_release));
 486
 487                         spin_lock_irqsave(&ctxp->ctxlock, iflag);
 488                         lpfc_nvmet_defer_release(phba, ctxp);
 489                         spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
 490                         lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, sid, oxid);
 491                 }
 492                 return;
 493         }
 494         spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
 495
 496         /*
 497          * Use the CPU context list, from the MRQ the IO was received on
 498          * (ctxp->idx), to save context structure.
 499          */
 500         spin_lock_irqsave(&phba->sli4_hba.t_active_list_lock, iflag);
 501         list_del_init(&ctxp->list);
 502         spin_unlock_irqrestore(&phba->sli4_hba.t_active_list_lock, iflag);
 503         cpu = raw_smp_processor_id();
 504         infop = lpfc_get_ctx_list(phba, cpu, ctxp->idx);
 505         spin_lock_irqsave(&infop->nvmet_ctx_list_lock, iflag);
 506         list_add_tail(&ctx_buf->list, &infop->nvmet_ctx_list);
 507         infop->nvmet_ctx_list_cnt++;
 508         spin_unlock_irqrestore(&infop->nvmet_ctx_list_lock, iflag);
 509 #endif
 510 }
 511
 512 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 513 static void
 514 lpfc_nvmet_ktime(struct lpfc_hba *phba,
 515                  struct lpfc_async_xchg_ctx *ctxp)
 516 {
 517         uint64_t seg1, seg2, seg3, seg4, seg5;
 518         uint64_t seg6, seg7, seg8, seg9, seg10;
 519         uint64_t segsum;
 520
 521         if (!ctxp->ts_isr_cmd || !ctxp->ts_cmd_nvme ||
 522             !ctxp->ts_nvme_data || !ctxp->ts_data_wqput ||
 523             !ctxp->ts_isr_data || !ctxp->ts_data_nvme ||
 524             !ctxp->ts_nvme_status || !ctxp->ts_status_wqput ||
 525             !ctxp->ts_isr_status || !ctxp->ts_status_nvme)
 526                 return;
 527
 528         if (ctxp->ts_status_nvme < ctxp->ts_isr_cmd)
 529                 return;
 530         if (ctxp->ts_isr_cmd  > ctxp->ts_cmd_nvme)
 531                 return;
 532         if (ctxp->ts_cmd_nvme > ctxp->ts_nvme_data)
 533                 return;
 534         if (ctxp->ts_nvme_data > ctxp->ts_data_wqput)
 535                 return;
 536         if (ctxp->ts_data_wqput > ctxp->ts_isr_data)
 537                 return;
 538         if (ctxp->ts_isr_data > ctxp->ts_data_nvme)
 539                 return;
 540         if (ctxp->ts_data_nvme > ctxp->ts_nvme_status)
 541                 return;
 542         if (ctxp->ts_nvme_status > ctxp->ts_status_wqput)
 543                 return;
 544         if (ctxp->ts_status_wqput > ctxp->ts_isr_status)
 545                 return;
 546         if (ctxp->ts_isr_status > ctxp->ts_status_nvme)
 547                 return;
 548         /*
 549          * Segment 1 - Time from FCP command received by MSI-X ISR
 550          * to FCP command is passed to NVME Layer.
 551          * Segment 2 - Time from FCP command payload handed
 552          * off to NVME Layer to Driver receives a Command op
 553          * from NVME Layer.
 554          * Segment 3 - Time from Driver receives a Command op
 555          * from NVME Layer to Command is put on WQ.
 556          * Segment 4 - Time from Driver WQ put is done
 557          * to MSI-X ISR for Command cmpl.
 558          * Segment 5 - Time from MSI-X ISR for Command cmpl to
 559          * Command cmpl is passed to NVME Layer.
 560          * Segment 6 - Time from Command cmpl is passed to NVME
 561          * Layer to Driver receives a RSP op from NVME Layer.
 562          * Segment 7 - Time from Driver receives a RSP op from
 563          * NVME Layer to WQ put is done on TRSP FCP Status.
 564          * Segment 8 - Time from Driver WQ put is done on TRSP
 565          * FCP Status to MSI-X ISR for TRSP cmpl.
 566          * Segment 9 - Time from MSI-X ISR for TRSP cmpl to
 567          * TRSP cmpl is passed to NVME Layer.
 568          * Segment 10 - Time from FCP command received by
 569          * MSI-X ISR to command is completed on wire.
 570          * (Segments 1 thru 8) for READDATA / WRITEDATA
 571          * (Segments 1 thru 4) for READDATA_RSP
 572          */
 573         seg1 = ctxp->ts_cmd_nvme - ctxp->ts_isr_cmd;
 574         segsum = seg1;
 575
 576         seg2 = ctxp->ts_nvme_data - ctxp->ts_isr_cmd;
 577         if (segsum > seg2)
 578                 return;
 579         seg2 -= segsum;
 580         segsum += seg2;
 581
 582         seg3 = ctxp->ts_data_wqput - ctxp->ts_isr_cmd;
 583         if (segsum > seg3)
 584                 return;
 585         seg3 -= segsum;
 586         segsum += seg3;
 587
 588         seg4 = ctxp->ts_isr_data - ctxp->ts_isr_cmd;
 589         if (segsum > seg4)
 590                 return;
 591         seg4 -= segsum;
 592         segsum += seg4;
 593
 594         seg5 = ctxp->ts_data_nvme - ctxp->ts_isr_cmd;
 595         if (segsum > seg5)
 596                 return;
 597         seg5 -= segsum;
 598         segsum += seg5;
 599
 600
 601         /* For auto rsp commands seg6 thru seg10 will be 0 */
 602         if (ctxp->ts_nvme_status > ctxp->ts_data_nvme) {
 603                 seg6 = ctxp->ts_nvme_status - ctxp->ts_isr_cmd;
 604                 if (segsum > seg6)
 605                         return;
 606                 seg6 -= segsum;
 607                 segsum += seg6;
 608
 609                 seg7 = ctxp->ts_status_wqput - ctxp->ts_isr_cmd;
 610                 if (segsum > seg7)
 611                         return;
 612                 seg7 -= segsum;
 613                 segsum += seg7;
 614
 615                 seg8 = ctxp->ts_isr_status - ctxp->ts_isr_cmd;
 616                 if (segsum > seg8)
 617                         return;
 618                 seg8 -= segsum;
 619                 segsum += seg8;
 620
 621                 seg9 = ctxp->ts_status_nvme - ctxp->ts_isr_cmd;
 622                 if (segsum > seg9)
 623                         return;
 624                 seg9 -= segsum;
 625                 segsum += seg9;
 626
 627                 if (ctxp->ts_isr_status < ctxp->ts_isr_cmd)
 628                         return;
 629                 seg10 = (ctxp->ts_isr_status -
 630                         ctxp->ts_isr_cmd);
 631         } else {
 632                 if (ctxp->ts_isr_data < ctxp->ts_isr_cmd)
 633                         return;
 634                 seg6 =  0;
 635                 seg7 =  0;
 636                 seg8 =  0;
 637                 seg9 =  0;
 638                 seg10 = (ctxp->ts_isr_data - ctxp->ts_isr_cmd);
 639         }
 640
 641         phba->ktime_seg1_total += seg1;
 642         if (seg1 < phba->ktime_seg1_min)
 643                 phba->ktime_seg1_min = seg1;
 644         else if (seg1 > phba->ktime_seg1_max)
 645                 phba->ktime_seg1_max = seg1;
 646
 647         phba->ktime_seg2_total += seg2;
 648         if (seg2 < phba->ktime_seg2_min)
 649                 phba->ktime_seg2_min = seg2;
 650         else if (seg2 > phba->ktime_seg2_max)
 651                 phba->ktime_seg2_max = seg2;
 652
 653         phba->ktime_seg3_total += seg3;
 654         if (seg3 < phba->ktime_seg3_min)
 655                 phba->ktime_seg3_min = seg3;
 656         else if (seg3 > phba->ktime_seg3_max)
 657                 phba->ktime_seg3_max = seg3;
 658
 659         phba->ktime_seg4_total += seg4;
 660         if (seg4 < phba->ktime_seg4_min)
 661                 phba->ktime_seg4_min = seg4;
 662         else if (seg4 > phba->ktime_seg4_max)
 663                 phba->ktime_seg4_max = seg4;
 664
 665         phba->ktime_seg5_total += seg5;
 666         if (seg5 < phba->ktime_seg5_min)
 667                 phba->ktime_seg5_min = seg5;
 668         else if (seg5 > phba->ktime_seg5_max)
 669                 phba->ktime_seg5_max = seg5;
 670
 671         phba->ktime_data_samples++;
 672         if (!seg6)
 673                 goto out;
 674
 675         phba->ktime_seg6_total += seg6;
 676         if (seg6 < phba->ktime_seg6_min)
 677                 phba->ktime_seg6_min = seg6;
 678         else if (seg6 > phba->ktime_seg6_max)
 679                 phba->ktime_seg6_max = seg6;
 680
 681         phba->ktime_seg7_total += seg7;
 682         if (seg7 < phba->ktime_seg7_min)
 683                 phba->ktime_seg7_min = seg7;
 684         else if (seg7 > phba->ktime_seg7_max)
 685                 phba->ktime_seg7_max = seg7;
 686
 687         phba->ktime_seg8_total += seg8;
 688         if (seg8 < phba->ktime_seg8_min)
 689                 phba->ktime_seg8_min = seg8;
 690         else if (seg8 > phba->ktime_seg8_max)
 691                 phba->ktime_seg8_max = seg8;
 692
 693         phba->ktime_seg9_total += seg9;
 694         if (seg9 < phba->ktime_seg9_min)
 695                 phba->ktime_seg9_min = seg9;
 696         else if (seg9 > phba->ktime_seg9_max)
 697                 phba->ktime_seg9_max = seg9;
 698 out:
 699         phba->ktime_seg10_total += seg10;
 700         if (seg10 < phba->ktime_seg10_min)
 701                 phba->ktime_seg10_min = seg10;
 702         else if (seg10 > phba->ktime_seg10_max)
 703                 phba->ktime_seg10_max = seg10;
 704         phba->ktime_status_samples++;
 705 }
 706 #endif
 707
 708 /**
 709  * lpfc_nvmet_xmt_fcp_op_cmp - Completion handler for FCP Response
 710  * @phba: Pointer to HBA context object.
 711  * @cmdwqe: Pointer to driver command WQE object.
 712  * @rspwqe: Pointer to driver response WQE object.
 713  *
 714  * The function is called from SLI ring event handler with no
 715  * lock held. This function is the completion handler for NVME FCP commands
 716  * The function frees memory resources used for the NVME commands.
 717  **/
 718 static void
 719 lpfc_nvmet_xmt_fcp_op_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
 720                           struct lpfc_iocbq *rspwqe)
 721 {
 722         struct lpfc_nvmet_tgtport *tgtp;
 723         struct nvmefc_tgt_fcp_req *rsp;
 724         struct lpfc_async_xchg_ctx *ctxp;
 725         uint32_t status, result, op, logerr;
 726         struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
 727 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 728         int id;
 729 #endif
 730
 731         ctxp = cmdwqe->context_un.axchg;
 732         ctxp->flag &= ~LPFC_NVME_IO_INP;
 733
 734         rsp = &ctxp->hdlrctx.fcp_req;
 735         op = rsp->op;
 736
 737         status = bf_get(lpfc_wcqe_c_status, wcqe);
 738         result = wcqe->parameter;
 739
 740         if (phba->targetport)
 741                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
 742         else
 743                 tgtp = NULL;
 744
 745         lpfc_nvmeio_data(phba, "NVMET FCP CMPL: xri x%x op x%x status x%x\n",
 746                          ctxp->oxid, op, status);
 747
 748         if (status) {
 749                 rsp->fcp_error = NVME_SC_DATA_XFER_ERROR;
 750                 rsp->transferred_length = 0;
 751                 if (tgtp) {
 752                         atomic_inc(&tgtp->xmt_fcp_rsp_error);
 753                         if (result == IOERR_ABORT_REQUESTED)
 754                                 atomic_inc(&tgtp->xmt_fcp_rsp_aborted);
 755                 }
 756
 757                 logerr = LOG_NVME_IOERR;
 758
 759                 /* pick up SLI4 exhange busy condition */
 760                 if (bf_get(lpfc_wcqe_c_xb, wcqe)) {
 761                         ctxp->flag |= LPFC_NVME_XBUSY;
 762                         logerr |= LOG_NVME_ABTS;
 763                         if (tgtp)
 764                                 atomic_inc(&tgtp->xmt_fcp_rsp_xb_set);
 765
 766                 } else {
 767                         ctxp->flag &= ~LPFC_NVME_XBUSY;
 768                 }
 769
 770                 lpfc_printf_log(phba, KERN_INFO, logerr,
 771                                 "6315 IO Error Cmpl oxid: x%x xri: x%x %x/%x "
 772                                 "XBUSY:x%x\n",
 773                                 ctxp->oxid, ctxp->ctxbuf->sglq->sli4_xritag,
 774                                 status, result, ctxp->flag);
 775
 776         } else {
 777                 rsp->fcp_error = NVME_SC_SUCCESS;
 778                 if (op == NVMET_FCOP_RSP)
 779                         rsp->transferred_length = rsp->rsplen;
 780                 else
 781                         rsp->transferred_length = rsp->transfer_length;
 782                 if (tgtp)
 783                         atomic_inc(&tgtp->xmt_fcp_rsp_cmpl);
 784         }
 785
 786         if ((op == NVMET_FCOP_READDATA_RSP) ||
 787             (op == NVMET_FCOP_RSP)) {
 788                 /* Sanity check */
 789                 ctxp->state = LPFC_NVME_STE_DONE;
 790                 ctxp->entry_cnt++;
 791
 792 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 793                 if (ctxp->ts_cmd_nvme) {
 794                         if (rsp->op == NVMET_FCOP_READDATA_RSP) {
 795                                 ctxp->ts_isr_data =
 796                                         cmdwqe->isr_timestamp;
 797                                 ctxp->ts_data_nvme =
 798                                         ktime_get_ns();
 799                                 ctxp->ts_nvme_status =
 800                                         ctxp->ts_data_nvme;
 801                                 ctxp->ts_status_wqput =
 802                                         ctxp->ts_data_nvme;
 803                                 ctxp->ts_isr_status =
 804                                         ctxp->ts_data_nvme;
 805                                 ctxp->ts_status_nvme =
 806                                         ctxp->ts_data_nvme;
 807                         } else {
 808                                 ctxp->ts_isr_status =
 809                                         cmdwqe->isr_timestamp;
 810                                 ctxp->ts_status_nvme =
 811                                         ktime_get_ns();
 812                         }
 813                 }
 814 #endif
 815                 rsp->done(rsp);
 816 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 817                 if (ctxp->ts_cmd_nvme)
 818                         lpfc_nvmet_ktime(phba, ctxp);
 819 #endif
 820                 /* lpfc_nvmet_xmt_fcp_release() will recycle the context */
 821         } else {
 822                 ctxp->entry_cnt++;
 823                 memset_startat(cmdwqe, 0, cmd_flag);
 824 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 825                 if (ctxp->ts_cmd_nvme) {
 826                         ctxp->ts_isr_data = cmdwqe->isr_timestamp;
 827                         ctxp->ts_data_nvme = ktime_get_ns();
 828                 }
 829 #endif
 830                 rsp->done(rsp);
 831         }
 832 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 833         if (phba->hdwqstat_on & LPFC_CHECK_NVMET_IO) {
 834                 id = raw_smp_processor_id();
 835                 this_cpu_inc(phba->sli4_hba.c_stat->cmpl_io);
 836                 if (ctxp->cpu != id)
 837                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
 838                                         "6704 CPU Check cmdcmpl: "
 839                                         "cpu %d expect %d\n",
 840                                         id, ctxp->cpu);
 841         }
 842 #endif
 843 }
 844
 845 /**
 846  * __lpfc_nvme_xmt_ls_rsp - Generic service routine to issue transmit
 847  *         an NVME LS rsp for a prior NVME LS request that was received.
 848  * @axchg: pointer to exchange context for the NVME LS request the response
 849  *         is for.
 850  * @ls_rsp: pointer to the transport LS RSP that is to be sent
 851  * @xmt_ls_rsp_cmp: completion routine to call upon RSP transmit done
 852  *
 853  * This routine is used to format and send a WQE to transmit a NVME LS
 854  * Response.  The response is for a prior NVME LS request that was
 855  * received and posted to the transport.
 856  *
 857  * Returns:
 858  *  0 : if response successfully transmit
 859  *  non-zero : if response failed to transmit, of the form -Exxx.
 860  **/
 861 int
 862 __lpfc_nvme_xmt_ls_rsp(struct lpfc_async_xchg_ctx *axchg,
 863                         struct nvmefc_ls_rsp *ls_rsp,
 864                         void (*xmt_ls_rsp_cmp)(struct lpfc_hba *phba,
 865                                 struct lpfc_iocbq *cmdwqe,
 866                                 struct lpfc_iocbq *rspwqe))
 867 {
 868         struct lpfc_hba *phba = axchg->phba;
 869         struct hbq_dmabuf *nvmebuf = (struct hbq_dmabuf *)axchg->rqb_buffer;
 870         struct lpfc_iocbq *nvmewqeq;
 871         struct lpfc_dmabuf dmabuf;
 872         struct ulp_bde64 bpl;
 873         int rc;
 874
 875         if (test_bit(FC_UNLOADING, &phba->pport->load_flag))
 876                 return -ENODEV;
 877
 878         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
 879                         "6023 NVMEx LS rsp oxid x%x\n", axchg->oxid);
 880
 881         if (axchg->state != LPFC_NVME_STE_LS_RCV || axchg->entry_cnt != 1) {
 882                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 883                                 "6412 NVMEx LS rsp state mismatch "
 884                                 "oxid x%x: %d %d\n",
 885                                 axchg->oxid, axchg->state, axchg->entry_cnt);
 886                 return -EALREADY;
 887         }
 888         axchg->state = LPFC_NVME_STE_LS_RSP;
 889         axchg->entry_cnt++;
 890
 891         nvmewqeq = lpfc_nvmet_prep_ls_wqe(phba, axchg, ls_rsp->rspdma,
 892                                          ls_rsp->rsplen);
 893         if (nvmewqeq == NULL) {
 894                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 895                                 "6150 NVMEx LS Drop Rsp x%x: Prep\n",
 896                                 axchg->oxid);
 897                 rc = -ENOMEM;
 898                 goto out_free_buf;
 899         }
 900
 901         /* Save numBdes for bpl2sgl */
 902         nvmewqeq->num_bdes = 1;
 903         nvmewqeq->hba_wqidx = 0;
 904         nvmewqeq->bpl_dmabuf = &dmabuf;
 905         dmabuf.virt = &bpl;
 906         bpl.addrLow = nvmewqeq->wqe.xmit_sequence.bde.addrLow;
 907         bpl.addrHigh = nvmewqeq->wqe.xmit_sequence.bde.addrHigh;
 908         bpl.tus.f.bdeSize = ls_rsp->rsplen;
 909         bpl.tus.f.bdeFlags = 0;
 910         bpl.tus.w = le32_to_cpu(bpl.tus.w);
 911         /*
 912          * Note: although we're using stack space for the dmabuf, the
 913          * call to lpfc_sli4_issue_wqe is synchronous, so it will not
 914          * be referenced after it returns back to this routine.
 915          */
 916
 917         nvmewqeq->cmd_cmpl = xmt_ls_rsp_cmp;
 918         nvmewqeq->context_un.axchg = axchg;
 919
 920         lpfc_nvmeio_data(phba, "NVMEx LS RSP: xri x%x wqidx x%x len x%x\n",
 921                          axchg->oxid, nvmewqeq->hba_wqidx, ls_rsp->rsplen);
 922
 923         rc = lpfc_sli4_issue_wqe(phba, axchg->hdwq, nvmewqeq);
 924
 925         /* clear to be sure there's no reference */
 926         nvmewqeq->bpl_dmabuf = NULL;
 927
 928         if (rc == WQE_SUCCESS) {
 929                 /*
 930                  * Okay to repost buffer here, but wait till cmpl
 931                  * before freeing ctxp and iocbq.
 932                  */
 933                 lpfc_in_buf_free(phba, &nvmebuf->dbuf);
 934                 return 0;
 935         }
 936
 937         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 938                         "6151 NVMEx LS RSP x%x: failed to transmit %d\n",
 939                         axchg->oxid, rc);
 940
 941         rc = -ENXIO;
 942
 943         lpfc_nlp_put(nvmewqeq->ndlp);
 944
 945 out_free_buf:
 946         /* Give back resources */
 947         lpfc_in_buf_free(phba, &nvmebuf->dbuf);
 948
 949         /*
 950          * As transport doesn't track completions of responses, if the rsp
 951          * fails to send, the transport will effectively ignore the rsp
 952          * and consider the LS done. However, the driver has an active
 953          * exchange open for the LS - so be sure to abort the exchange
 954          * if the response isn't sent.
 955          */
 956         lpfc_nvme_unsol_ls_issue_abort(phba, axchg, axchg->sid, axchg->oxid);
 957         return rc;
 958 }
 959
 960 /**
 961  * lpfc_nvmet_xmt_ls_rsp - Transmit NVME LS response
 962  * @tgtport: pointer to target port that NVME LS is to be transmit from.
 963  * @ls_rsp: pointer to the transport LS RSP that is to be sent
 964  *
 965  * Driver registers this routine to transmit responses for received NVME
 966  * LS requests.
 967  *
 968  * This routine is used to format and send a WQE to transmit a NVME LS
 969  * Response. The ls_rsp is used to reverse-map the LS to the original
 970  * NVME LS request sequence, which provides addressing information for
 971  * the remote port the LS to be sent to, as well as the exchange id
 972  * that is the LS is bound to.
 973  *
 974  * Returns:
 975  *  0 : if response successfully transmit
 976  *  non-zero : if response failed to transmit, of the form -Exxx.
 977  **/
 978 static int
 979 lpfc_nvmet_xmt_ls_rsp(struct nvmet_fc_target_port *tgtport,
 980                       struct nvmefc_ls_rsp *ls_rsp)
 981 {
 982         struct lpfc_async_xchg_ctx *axchg =
 983                 container_of(ls_rsp, struct lpfc_async_xchg_ctx, ls_rsp);
 984         struct lpfc_nvmet_tgtport *nvmep = tgtport->private;
 985         int rc;
 986
 987         if (test_bit(FC_UNLOADING, &axchg->phba->pport->load_flag))
 988                 return -ENODEV;
 989
 990         rc = __lpfc_nvme_xmt_ls_rsp(axchg, ls_rsp, lpfc_nvmet_xmt_ls_rsp_cmp);
 991
 992         if (rc) {
 993                 atomic_inc(&nvmep->xmt_ls_drop);
 994                 /*
 995                  * unless the failure is due to having already sent
 996                  * the response, an abort will be generated for the
 997                  * exchange if the rsp can't be sent.
 998                  */
 999                 if (rc != -EALREADY)
1000                         atomic_inc(&nvmep->xmt_ls_abort);
1001                 return rc;
1002         }
1003
1004         atomic_inc(&nvmep->xmt_ls_rsp);
1005         return 0;
1006 }
1007
1008 static int
1009 lpfc_nvmet_xmt_fcp_op(struct nvmet_fc_target_port *tgtport,
1010                       struct nvmefc_tgt_fcp_req *rsp)
1011 {
1012         struct lpfc_nvmet_tgtport *lpfc_nvmep = tgtport->private;
1013         struct lpfc_async_xchg_ctx *ctxp =
1014                 container_of(rsp, struct lpfc_async_xchg_ctx, hdlrctx.fcp_req);
1015         struct lpfc_hba *phba = ctxp->phba;
1016         struct lpfc_queue *wq;
1017         struct lpfc_iocbq *nvmewqeq;
1018         struct lpfc_sli_ring *pring;
1019         unsigned long iflags;
1020         int rc;
1021 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1022         int id;
1023 #endif
1024
1025         if (test_bit(FC_UNLOADING, &phba->pport->load_flag)) {
1026                 rc = -ENODEV;
1027                 goto aerr;
1028         }
1029
1030 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1031         if (ctxp->ts_cmd_nvme) {
1032                 if (rsp->op == NVMET_FCOP_RSP)
1033                         ctxp->ts_nvme_status = ktime_get_ns();
1034                 else
1035                         ctxp->ts_nvme_data = ktime_get_ns();
1036         }
1037
1038         /* Setup the hdw queue if not already set */
1039         if (!ctxp->hdwq)
1040                 ctxp->hdwq = &phba->sli4_hba.hdwq[rsp->hwqid];
1041
1042         if (phba->hdwqstat_on & LPFC_CHECK_NVMET_IO) {
1043                 id = raw_smp_processor_id();
1044                 this_cpu_inc(phba->sli4_hba.c_stat->xmt_io);
1045                 if (rsp->hwqid != id)
1046                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
1047                                         "6705 CPU Check OP: "
1048                                         "cpu %d expect %d\n",
1049                                         id, rsp->hwqid);
1050                 ctxp->cpu = id; /* Setup cpu for cmpl check */
1051         }
1052 #endif
1053
1054         /* Sanity check */
1055         if ((ctxp->flag & LPFC_NVME_ABTS_RCV) ||
1056             (ctxp->state == LPFC_NVME_STE_ABORT)) {
1057                 atomic_inc(&lpfc_nvmep->xmt_fcp_drop);
1058                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1059                                 "6102 IO oxid x%x aborted\n",
1060                                 ctxp->oxid);
1061                 rc = -ENXIO;
1062                 goto aerr;
1063         }
1064
1065         nvmewqeq = lpfc_nvmet_prep_fcp_wqe(phba, ctxp);
1066         if (nvmewqeq == NULL) {
1067                 atomic_inc(&lpfc_nvmep->xmt_fcp_drop);
1068                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1069                                 "6152 FCP Drop IO x%x: Prep\n",
1070                                 ctxp->oxid);
1071                 rc = -ENXIO;
1072                 goto aerr;
1073         }
1074
1075         nvmewqeq->cmd_cmpl = lpfc_nvmet_xmt_fcp_op_cmp;
1076         nvmewqeq->context_un.axchg = ctxp;
1077         nvmewqeq->cmd_flag |=  LPFC_IO_NVMET;
1078         ctxp->wqeq->hba_wqidx = rsp->hwqid;
1079
1080         lpfc_nvmeio_data(phba, "NVMET FCP CMND: xri x%x op x%x len x%x\n",
1081                          ctxp->oxid, rsp->op, rsp->rsplen);
1082
1083         ctxp->flag |= LPFC_NVME_IO_INP;
1084         rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, nvmewqeq);
1085         if (rc == WQE_SUCCESS) {
1086 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1087                 if (!ctxp->ts_cmd_nvme)
1088                         return 0;
1089                 if (rsp->op == NVMET_FCOP_RSP)
1090                         ctxp->ts_status_wqput = ktime_get_ns();
1091                 else
1092                         ctxp->ts_data_wqput = ktime_get_ns();
1093 #endif
1094                 return 0;
1095         }
1096
1097         if (rc == -EBUSY) {
1098                 /*
1099                  * WQ was full, so queue nvmewqeq to be sent after
1100                  * WQE release CQE
1101                  */
1102                 ctxp->flag |= LPFC_NVME_DEFER_WQFULL;
1103                 wq = ctxp->hdwq->io_wq;
1104                 pring = wq->pring;
1105                 spin_lock_irqsave(&pring->ring_lock, iflags);
1106                 list_add_tail(&nvmewqeq->list, &wq->wqfull_list);
1107                 wq->q_flag |= HBA_NVMET_WQFULL;
1108                 spin_unlock_irqrestore(&pring->ring_lock, iflags);
1109                 atomic_inc(&lpfc_nvmep->defer_wqfull);
1110                 return 0;
1111         }
1112
1113         /* Give back resources */
1114         atomic_inc(&lpfc_nvmep->xmt_fcp_drop);
1115         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1116                         "6153 FCP Drop IO x%x: Issue: %d\n",
1117                         ctxp->oxid, rc);
1118
1119         ctxp->wqeq->hba_wqidx = 0;
1120         nvmewqeq->context_un.axchg = NULL;
1121         nvmewqeq->bpl_dmabuf = NULL;
1122         rc = -EBUSY;
1123 aerr:
1124         return rc;
1125 }
1126
1127 static void
1128 lpfc_nvmet_targetport_delete(struct nvmet_fc_target_port *targetport)
1129 {
1130         struct lpfc_nvmet_tgtport *tport = targetport->private;
1131
1132         /* release any threads waiting for the unreg to complete */
1133         if (tport->phba->targetport)
1134                 complete(tport->tport_unreg_cmp);
1135 }
1136
1137 static void
1138 lpfc_nvmet_xmt_fcp_abort(struct nvmet_fc_target_port *tgtport,
1139                          struct nvmefc_tgt_fcp_req *req)
1140 {
1141         struct lpfc_nvmet_tgtport *lpfc_nvmep = tgtport->private;
1142         struct lpfc_async_xchg_ctx *ctxp =
1143                 container_of(req, struct lpfc_async_xchg_ctx, hdlrctx.fcp_req);
1144         struct lpfc_hba *phba = ctxp->phba;
1145         struct lpfc_queue *wq;
1146         unsigned long flags;
1147
1148         if (test_bit(FC_UNLOADING, &phba->pport->load_flag))
1149                 return;
1150
1151         if (!ctxp->hdwq)
1152                 ctxp->hdwq = &phba->sli4_hba.hdwq[0];
1153
1154         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1155                         "6103 NVMET Abort op: oxid x%x flg x%x ste %d\n",
1156                         ctxp->oxid, ctxp->flag, ctxp->state);
1157
1158         lpfc_nvmeio_data(phba, "NVMET FCP ABRT: xri x%x flg x%x ste x%x\n",
1159                          ctxp->oxid, ctxp->flag, ctxp->state);
1160
1161         atomic_inc(&lpfc_nvmep->xmt_fcp_abort);
1162
1163         spin_lock_irqsave(&ctxp->ctxlock, flags);
1164
1165         /* Since iaab/iaar are NOT set, we need to check
1166          * if the firmware is in process of aborting IO
1167          */
1168         if (ctxp->flag & (LPFC_NVME_XBUSY | LPFC_NVME_ABORT_OP)) {
1169                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
1170                 return;
1171         }
1172         ctxp->flag |= LPFC_NVME_ABORT_OP;
1173
1174         if (ctxp->flag & LPFC_NVME_DEFER_WQFULL) {
1175                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
1176                 lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid,
1177                                                  ctxp->oxid);
1178                 wq = ctxp->hdwq->io_wq;
1179                 lpfc_nvmet_wqfull_flush(phba, wq, ctxp);
1180                 return;
1181         }
1182         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
1183
1184         /* A state of LPFC_NVME_STE_RCV means we have just received
1185          * the NVME command and have not started processing it.
1186          * (by issuing any IO WQEs on this exchange yet)
1187          */
1188         if (ctxp->state == LPFC_NVME_STE_RCV)
1189                 lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid,
1190                                                  ctxp->oxid);
1191         else
1192                 lpfc_nvmet_sol_fcp_issue_abort(phba, ctxp, ctxp->sid,
1193                                                ctxp->oxid);
1194 }
1195
1196 static void
1197 lpfc_nvmet_xmt_fcp_release(struct nvmet_fc_target_port *tgtport,
1198                            struct nvmefc_tgt_fcp_req *rsp)
1199 {
1200         struct lpfc_nvmet_tgtport *lpfc_nvmep = tgtport->private;
1201         struct lpfc_async_xchg_ctx *ctxp =
1202                 container_of(rsp, struct lpfc_async_xchg_ctx, hdlrctx.fcp_req);
1203         struct lpfc_hba *phba = ctxp->phba;
1204         unsigned long flags;
1205         bool aborting = false;
1206
1207         spin_lock_irqsave(&ctxp->ctxlock, flags);
1208         if (ctxp->flag & LPFC_NVME_XBUSY)
1209                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
1210                                 "6027 NVMET release with XBUSY flag x%x"
1211                                 " oxid x%x\n",
1212                                 ctxp->flag, ctxp->oxid);
1213         else if (ctxp->state != LPFC_NVME_STE_DONE &&
1214                  ctxp->state != LPFC_NVME_STE_ABORT)
1215                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1216                                 "6413 NVMET release bad state %d %d oxid x%x\n",
1217                                 ctxp->state, ctxp->entry_cnt, ctxp->oxid);
1218
1219         if ((ctxp->flag & LPFC_NVME_ABORT_OP) ||
1220             (ctxp->flag & LPFC_NVME_XBUSY)) {
1221                 aborting = true;
1222                 /* let the abort path do the real release */
1223                 lpfc_nvmet_defer_release(phba, ctxp);
1224         }
1225         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
1226
1227         lpfc_nvmeio_data(phba, "NVMET FCP FREE: xri x%x ste %d abt %d\n", ctxp->oxid,
1228                          ctxp->state, aborting);
1229
1230         atomic_inc(&lpfc_nvmep->xmt_fcp_release);
1231         ctxp->flag &= ~LPFC_NVME_TNOTIFY;
1232
1233         if (aborting)
1234                 return;
1235
1236         lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
1237 }
1238
1239 static void
1240 lpfc_nvmet_defer_rcv(struct nvmet_fc_target_port *tgtport,
1241                      struct nvmefc_tgt_fcp_req *rsp)
1242 {
1243         struct lpfc_nvmet_tgtport *tgtp;
1244         struct lpfc_async_xchg_ctx *ctxp =
1245                 container_of(rsp, struct lpfc_async_xchg_ctx, hdlrctx.fcp_req);
1246         struct rqb_dmabuf *nvmebuf = ctxp->rqb_buffer;
1247         struct lpfc_hba *phba = ctxp->phba;
1248         unsigned long iflag;
1249
1250
1251         lpfc_nvmeio_data(phba, "NVMET DEFERRCV: xri x%x sz %d CPU %02x\n",
1252                          ctxp->oxid, ctxp->size, raw_smp_processor_id());
1253
1254         if (!nvmebuf) {
1255                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
1256                                 "6425 Defer rcv: no buffer oxid x%x: "
1257                                 "flg %x ste %x\n",
1258                                 ctxp->oxid, ctxp->flag, ctxp->state);
1259                 return;
1260         }
1261
1262         tgtp = phba->targetport->private;
1263         if (tgtp)
1264                 atomic_inc(&tgtp->rcv_fcp_cmd_defer);
1265
1266         /* Free the nvmebuf since a new buffer already replaced it */
1267         nvmebuf->hrq->rqbp->rqb_free_buffer(phba, nvmebuf);
1268         spin_lock_irqsave(&ctxp->ctxlock, iflag);
1269         ctxp->rqb_buffer = NULL;
1270         spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1271 }
1272
1273 /**
1274  * lpfc_nvmet_ls_req_cmp - completion handler for a nvme ls request
1275  * @phba: Pointer to HBA context object
1276  * @cmdwqe: Pointer to driver command WQE object.
1277  * @rspwqe: Pointer to driver response WQE object.
1278  *
1279  * This function is the completion handler for NVME LS requests.
1280  * The function updates any states and statistics, then calls the
1281  * generic completion handler to finish completion of the request.
1282  **/
1283 static void
1284 lpfc_nvmet_ls_req_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
1285                       struct lpfc_iocbq *rspwqe)
1286 {
1287         struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
1288         __lpfc_nvme_ls_req_cmp(phba, cmdwqe->vport, cmdwqe, wcqe);
1289 }
1290
1291 /**
1292  * lpfc_nvmet_ls_req - Issue an Link Service request
1293  * @targetport: pointer to target instance registered with nvmet transport.
1294  * @hosthandle: hosthandle set by the driver in a prior ls_rqst_rcv.
1295  *               Driver sets this value to the ndlp pointer.
1296  * @pnvme_lsreq: the transport nvme_ls_req structure for the LS
1297  *
1298  * Driver registers this routine to handle any link service request
1299  * from the nvme_fc transport to a remote nvme-aware port.
1300  *
1301  * Return value :
1302  *   0 - Success
1303  *   non-zero: various error codes, in form of -Exxx
1304  **/
1305 static int
1306 lpfc_nvmet_ls_req(struct nvmet_fc_target_port *targetport,
1307                   void *hosthandle,
1308                   struct nvmefc_ls_req *pnvme_lsreq)
1309 {
1310         struct lpfc_nvmet_tgtport *lpfc_nvmet = targetport->private;
1311         struct lpfc_hba *phba;
1312         struct lpfc_nodelist *ndlp;
1313         int ret;
1314         u32 hstate;
1315
1316         if (!lpfc_nvmet)
1317                 return -EINVAL;
1318
1319         phba = lpfc_nvmet->phba;
1320         if (test_bit(FC_UNLOADING, &phba->pport->load_flag))
1321                 return -EINVAL;
1322
1323         hstate = atomic_read(&lpfc_nvmet->state);
1324         if (hstate == LPFC_NVMET_INV_HOST_ACTIVE)
1325                 return -EACCES;
1326
1327         ndlp = (struct lpfc_nodelist *)hosthandle;
1328
1329         ret = __lpfc_nvme_ls_req(phba->pport, ndlp, pnvme_lsreq,
1330                                  lpfc_nvmet_ls_req_cmp);
1331
1332         return ret;
1333 }
1334
1335 /**
1336  * lpfc_nvmet_ls_abort - Abort a prior NVME LS request
1337  * @targetport: Transport targetport, that LS was issued from.
1338  * @hosthandle: hosthandle set by the driver in a prior ls_rqst_rcv.
1339  *               Driver sets this value to the ndlp pointer.
1340  * @pnvme_lsreq: the transport nvme_ls_req structure for LS to be aborted
1341  *
1342  * Driver registers this routine to abort an NVME LS request that is
1343  * in progress (from the transports perspective).
1344  **/
1345 static void
1346 lpfc_nvmet_ls_abort(struct nvmet_fc_target_port *targetport,
1347                     void *hosthandle,
1348                     struct nvmefc_ls_req *pnvme_lsreq)
1349 {
1350         struct lpfc_nvmet_tgtport *lpfc_nvmet = targetport->private;
1351         struct lpfc_hba *phba;
1352         struct lpfc_nodelist *ndlp;
1353         int ret;
1354
1355         phba = lpfc_nvmet->phba;
1356         if (test_bit(FC_UNLOADING, &phba->pport->load_flag))
1357                 return;
1358
1359         ndlp = (struct lpfc_nodelist *)hosthandle;
1360
1361         ret = __lpfc_nvme_ls_abort(phba->pport, ndlp, pnvme_lsreq);
1362         if (!ret)
1363                 atomic_inc(&lpfc_nvmet->xmt_ls_abort);
1364 }
1365
1366 static int
1367 lpfc_nvmet_host_traddr(void *hosthandle, u64 *wwnn, u64 *wwpn)
1368 {
1369         struct lpfc_nodelist *ndlp = hosthandle;
1370
1371         *wwnn = wwn_to_u64(ndlp->nlp_nodename.u.wwn);
1372         *wwpn = wwn_to_u64(ndlp->nlp_portname.u.wwn);
1373         return 0;
1374 }
1375
1376 static void
1377 lpfc_nvmet_host_release(void *hosthandle)
1378 {
1379         struct lpfc_nodelist *ndlp = hosthandle;
1380         struct lpfc_hba *phba = ndlp->phba;
1381         struct lpfc_nvmet_tgtport *tgtp;
1382
1383         if (!phba->targetport || !phba->targetport->private)
1384                 return;
1385
1386         lpfc_printf_log(phba, KERN_ERR, LOG_NVME,
1387                         "6202 NVMET XPT releasing hosthandle x%px "
1388                         "DID x%x xflags x%x refcnt %d\n",
1389                         hosthandle, ndlp->nlp_DID, ndlp->fc4_xpt_flags,
1390                         kref_read(&ndlp->kref));
1391         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
1392         spin_lock_irq(&ndlp->lock);
1393         ndlp->fc4_xpt_flags &= ~NLP_XPT_HAS_HH;
1394         spin_unlock_irq(&ndlp->lock);
1395         lpfc_nlp_put(ndlp);
1396         atomic_set(&tgtp->state, 0);
1397 }
1398
1399 static void
1400 lpfc_nvmet_discovery_event(struct nvmet_fc_target_port *tgtport)
1401 {
1402         struct lpfc_nvmet_tgtport *tgtp;
1403         struct lpfc_hba *phba;
1404         uint32_t rc;
1405
1406         tgtp = tgtport->private;
1407         phba = tgtp->phba;
1408
1409         rc = lpfc_issue_els_rscn(phba->pport, 0);
1410         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1411                         "6420 NVMET subsystem change: Notification %s\n",
1412                         (rc) ? "Failed" : "Sent");
1413 }
1414
1415 static struct nvmet_fc_target_template lpfc_tgttemplate = {
1416         .targetport_delete = lpfc_nvmet_targetport_delete,
1417         .xmt_ls_rsp     = lpfc_nvmet_xmt_ls_rsp,
1418         .fcp_op         = lpfc_nvmet_xmt_fcp_op,
1419         .fcp_abort      = lpfc_nvmet_xmt_fcp_abort,
1420         .fcp_req_release = lpfc_nvmet_xmt_fcp_release,
1421         .defer_rcv      = lpfc_nvmet_defer_rcv,
1422         .discovery_event = lpfc_nvmet_discovery_event,
1423         .ls_req         = lpfc_nvmet_ls_req,
1424         .ls_abort       = lpfc_nvmet_ls_abort,
1425         .host_release   = lpfc_nvmet_host_release,
1426         .host_traddr    = lpfc_nvmet_host_traddr,
1427
1428         .max_hw_queues  = 1,
1429         .max_sgl_segments = LPFC_NVMET_DEFAULT_SEGS,
1430         .max_dif_sgl_segments = LPFC_NVMET_DEFAULT_SEGS,
1431         .dma_boundary = 0xFFFFFFFF,
1432
1433         /* optional features */
1434         .target_features = 0,
1435         /* sizes of additional private data for data structures */
1436         .target_priv_sz = sizeof(struct lpfc_nvmet_tgtport),
1437         .lsrqst_priv_sz = 0,
1438 };
1439
1440 static void
1441 __lpfc_nvmet_clean_io_for_cpu(struct lpfc_hba *phba,
1442                 struct lpfc_nvmet_ctx_info *infop)
1443 {
1444         struct lpfc_nvmet_ctxbuf *ctx_buf, *next_ctx_buf;
1445         unsigned long flags;
1446
1447         spin_lock_irqsave(&infop->nvmet_ctx_list_lock, flags);
1448         list_for_each_entry_safe(ctx_buf, next_ctx_buf,
1449                                 &infop->nvmet_ctx_list, list) {
1450                 spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1451                 list_del_init(&ctx_buf->list);
1452                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1453
1454                 spin_lock(&phba->hbalock);
1455                 __lpfc_clear_active_sglq(phba, ctx_buf->sglq->sli4_lxritag);
1456                 spin_unlock(&phba->hbalock);
1457
1458                 ctx_buf->sglq->state = SGL_FREED;
1459                 ctx_buf->sglq->ndlp = NULL;
1460
1461                 spin_lock(&phba->sli4_hba.sgl_list_lock);
1462                 list_add_tail(&ctx_buf->sglq->list,
1463                                 &phba->sli4_hba.lpfc_nvmet_sgl_list);
1464                 spin_unlock(&phba->sli4_hba.sgl_list_lock);
1465
1466                 lpfc_sli_release_iocbq(phba, ctx_buf->iocbq);
1467                 kfree(ctx_buf->context);
1468         }
1469         spin_unlock_irqrestore(&infop->nvmet_ctx_list_lock, flags);
1470 }
1471
1472 static void
1473 lpfc_nvmet_cleanup_io_context(struct lpfc_hba *phba)
1474 {
1475         struct lpfc_nvmet_ctx_info *infop;
1476         int i, j;
1477
1478         /* The first context list, MRQ 0 CPU 0 */
1479         infop = phba->sli4_hba.nvmet_ctx_info;
1480         if (!infop)
1481                 return;
1482
1483         /* Cycle the entire CPU context list for every MRQ */
1484         for (i = 0; i < phba->cfg_nvmet_mrq; i++) {
1485                 for_each_present_cpu(j) {
1486                         infop = lpfc_get_ctx_list(phba, j, i);
1487                         __lpfc_nvmet_clean_io_for_cpu(phba, infop);
1488                 }
1489         }
1490         kfree(phba->sli4_hba.nvmet_ctx_info);
1491         phba->sli4_hba.nvmet_ctx_info = NULL;
1492 }
1493
1494 static int
1495 lpfc_nvmet_setup_io_context(struct lpfc_hba *phba)
1496 {
1497         struct lpfc_nvmet_ctxbuf *ctx_buf;
1498         struct lpfc_iocbq *nvmewqe;
1499         union lpfc_wqe128 *wqe;
1500         struct lpfc_nvmet_ctx_info *last_infop;
1501         struct lpfc_nvmet_ctx_info *infop;
1502         int i, j, idx, cpu;
1503
1504         lpfc_printf_log(phba, KERN_INFO, LOG_NVME,
1505                         "6403 Allocate NVMET resources for %d XRIs\n",
1506                         phba->sli4_hba.nvmet_xri_cnt);
1507
1508         phba->sli4_hba.nvmet_ctx_info = kcalloc(
1509                 phba->sli4_hba.num_possible_cpu * phba->cfg_nvmet_mrq,
1510                 sizeof(struct lpfc_nvmet_ctx_info), GFP_KERNEL);
1511         if (!phba->sli4_hba.nvmet_ctx_info) {
1512                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1513                                 "6419 Failed allocate memory for "
1514                                 "nvmet context lists\n");
1515                 return -ENOMEM;
1516         }
1517
1518         /*
1519          * Assuming X CPUs in the system, and Y MRQs, allocate some
1520          * lpfc_nvmet_ctx_info structures as follows:
1521          *
1522          * cpu0/mrq0 cpu1/mrq0 ... cpuX/mrq0
1523          * cpu0/mrq1 cpu1/mrq1 ... cpuX/mrq1
1524          * ...
1525          * cpuX/mrqY cpuX/mrqY ... cpuX/mrqY
1526          *
1527          * Each line represents a MRQ "silo" containing an entry for
1528          * every CPU.
1529          *
1530          * MRQ X is initially assumed to be associated with CPU X, thus
1531          * contexts are initially distributed across all MRQs using
1532          * the MRQ index (N) as follows cpuN/mrqN. When contexts are
1533          * freed, the are freed to the MRQ silo based on the CPU number
1534          * of the IO completion. Thus a context that was allocated for MRQ A
1535          * whose IO completed on CPU B will be freed to cpuB/mrqA.
1536          */
1537         for_each_possible_cpu(i) {
1538                 for (j = 0; j < phba->cfg_nvmet_mrq; j++) {
1539                         infop = lpfc_get_ctx_list(phba, i, j);
1540                         INIT_LIST_HEAD(&infop->nvmet_ctx_list);
1541                         spin_lock_init(&infop->nvmet_ctx_list_lock);
1542                         infop->nvmet_ctx_list_cnt = 0;
1543                 }
1544         }
1545
1546         /*
1547          * Setup the next CPU context info ptr for each MRQ.
1548          * MRQ 0 will cycle thru CPUs 0 - X separately from
1549          * MRQ 1 cycling thru CPUs 0 - X, and so on.
1550          */
1551         for (j = 0; j < phba->cfg_nvmet_mrq; j++) {
1552                 last_infop = lpfc_get_ctx_list(phba,
1553                                                cpumask_first(cpu_present_mask),
1554                                                j);
1555                 for (i = phba->sli4_hba.num_possible_cpu - 1;  i >= 0; i--) {
1556                         infop = lpfc_get_ctx_list(phba, i, j);
1557                         infop->nvmet_ctx_next_cpu = last_infop;
1558                         last_infop = infop;
1559                 }
1560         }
1561
1562         /* For all nvmet xris, allocate resources needed to process a
1563          * received command on a per xri basis.
1564          */
1565         idx = 0;
1566         cpu = cpumask_first(cpu_present_mask);
1567         for (i = 0; i < phba->sli4_hba.nvmet_xri_cnt; i++) {
1568                 ctx_buf = kzalloc(sizeof(*ctx_buf), GFP_KERNEL);
1569                 if (!ctx_buf) {
1570                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1571                                         "6404 Ran out of memory for NVMET\n");
1572                         return -ENOMEM;
1573                 }
1574
1575                 ctx_buf->context = kzalloc(sizeof(*ctx_buf->context),
1576                                            GFP_KERNEL);
1577                 if (!ctx_buf->context) {
1578                         kfree(ctx_buf);
1579                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1580                                         "6405 Ran out of NVMET "
1581                                         "context memory\n");
1582                         return -ENOMEM;
1583                 }
1584                 ctx_buf->context->ctxbuf = ctx_buf;
1585                 ctx_buf->context->state = LPFC_NVME_STE_FREE;
1586
1587                 ctx_buf->iocbq = lpfc_sli_get_iocbq(phba);
1588                 if (!ctx_buf->iocbq) {
1589                         kfree(ctx_buf->context);
1590                         kfree(ctx_buf);
1591                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1592                                         "6406 Ran out of NVMET iocb/WQEs\n");
1593                         return -ENOMEM;
1594                 }
1595                 ctx_buf->iocbq->cmd_flag = LPFC_IO_NVMET;
1596                 nvmewqe = ctx_buf->iocbq;
1597                 wqe = &nvmewqe->wqe;
1598
1599                 /* Initialize WQE */
1600                 memset(wqe, 0, sizeof(*wqe));
1601
1602                 ctx_buf->iocbq->cmd_dmabuf = NULL;
1603                 spin_lock(&phba->sli4_hba.sgl_list_lock);
1604                 ctx_buf->sglq = __lpfc_sli_get_nvmet_sglq(phba, ctx_buf->iocbq);
1605                 spin_unlock(&phba->sli4_hba.sgl_list_lock);
1606                 if (!ctx_buf->sglq) {
1607                         lpfc_sli_release_iocbq(phba, ctx_buf->iocbq);
1608                         kfree(ctx_buf->context);
1609                         kfree(ctx_buf);
1610                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1611                                         "6407 Ran out of NVMET XRIs\n");
1612                         return -ENOMEM;
1613                 }
1614                 INIT_WORK(&ctx_buf->defer_work, lpfc_nvmet_fcp_rqst_defer_work);
1615
1616                 /*
1617                  * Add ctx to MRQidx context list. Our initial assumption
1618                  * is MRQidx will be associated with CPUidx. This association
1619                  * can change on the fly.
1620                  */
1621                 infop = lpfc_get_ctx_list(phba, cpu, idx);
1622                 spin_lock(&infop->nvmet_ctx_list_lock);
1623                 list_add_tail(&ctx_buf->list, &infop->nvmet_ctx_list);
1624                 infop->nvmet_ctx_list_cnt++;
1625                 spin_unlock(&infop->nvmet_ctx_list_lock);
1626
1627                 /* Spread ctx structures evenly across all MRQs */
1628                 idx++;
1629                 if (idx >= phba->cfg_nvmet_mrq) {
1630                         idx = 0;
1631                         cpu = cpumask_first(cpu_present_mask);
1632                         continue;
1633                 }
1634                 cpu = lpfc_next_present_cpu(cpu);
1635         }
1636
1637         for_each_present_cpu(i) {
1638                 for (j = 0; j < phba->cfg_nvmet_mrq; j++) {
1639                         infop = lpfc_get_ctx_list(phba, i, j);
1640                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME | LOG_INIT,
1641                                         "6408 TOTAL NVMET ctx for CPU %d "
1642                                         "MRQ %d: cnt %d nextcpu x%px\n",
1643                                         i, j, infop->nvmet_ctx_list_cnt,
1644                                         infop->nvmet_ctx_next_cpu);
1645                 }
1646         }
1647         return 0;
1648 }
1649
1650 int
1651 lpfc_nvmet_create_targetport(struct lpfc_hba *phba)
1652 {
1653         struct lpfc_vport  *vport = phba->pport;
1654         struct lpfc_nvmet_tgtport *tgtp;
1655         struct nvmet_fc_port_info pinfo;
1656         int error;
1657
1658         if (phba->targetport)
1659                 return 0;
1660
1661         error = lpfc_nvmet_setup_io_context(phba);
1662         if (error)
1663                 return error;
1664
1665         memset(&pinfo, 0, sizeof(struct nvmet_fc_port_info));
1666         pinfo.node_name = wwn_to_u64(vport->fc_nodename.u.wwn);
1667         pinfo.port_name = wwn_to_u64(vport->fc_portname.u.wwn);
1668         pinfo.port_id = vport->fc_myDID;
1669
1670         /* We need to tell the transport layer + 1 because it takes page
1671          * alignment into account. When space for the SGL is allocated we
1672          * allocate + 3, one for cmd, one for rsp and one for this alignment
1673          */
1674         lpfc_tgttemplate.max_sgl_segments = phba->cfg_nvme_seg_cnt + 1;
1675         lpfc_tgttemplate.max_hw_queues = phba->cfg_hdw_queue;
1676         lpfc_tgttemplate.target_features = NVMET_FCTGTFEAT_READDATA_RSP;
1677
1678 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
1679         error = nvmet_fc_register_targetport(&pinfo, &lpfc_tgttemplate,
1680                                              &phba->pcidev->dev,
1681                                              &phba->targetport);
1682 #else
1683         error = -ENOENT;
1684 #endif
1685         if (error) {
1686                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1687                                 "6025 Cannot register NVME targetport x%x: "
1688                                 "portnm %llx nodenm %llx segs %d qs %d\n",
1689                                 error,
1690                                 pinfo.port_name, pinfo.node_name,
1691                                 lpfc_tgttemplate.max_sgl_segments,
1692                                 lpfc_tgttemplate.max_hw_queues);
1693                 phba->targetport = NULL;
1694                 phba->nvmet_support = 0;
1695
1696                 lpfc_nvmet_cleanup_io_context(phba);
1697
1698         } else {
1699                 tgtp = (struct lpfc_nvmet_tgtport *)
1700                         phba->targetport->private;
1701                 tgtp->phba = phba;
1702
1703                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
1704                                 "6026 Registered NVME "
1705                                 "targetport: x%px, private x%px "
1706                                 "portnm %llx nodenm %llx segs %d qs %d\n",
1707                                 phba->targetport, tgtp,
1708                                 pinfo.port_name, pinfo.node_name,
1709                                 lpfc_tgttemplate.max_sgl_segments,
1710                                 lpfc_tgttemplate.max_hw_queues);
1711
1712                 atomic_set(&tgtp->rcv_ls_req_in, 0);
1713                 atomic_set(&tgtp->rcv_ls_req_out, 0);
1714                 atomic_set(&tgtp->rcv_ls_req_drop, 0);
1715                 atomic_set(&tgtp->xmt_ls_abort, 0);
1716                 atomic_set(&tgtp->xmt_ls_abort_cmpl, 0);
1717                 atomic_set(&tgtp->xmt_ls_rsp, 0);
1718                 atomic_set(&tgtp->xmt_ls_drop, 0);
1719                 atomic_set(&tgtp->xmt_ls_rsp_error, 0);
1720                 atomic_set(&tgtp->xmt_ls_rsp_xb_set, 0);
1721                 atomic_set(&tgtp->xmt_ls_rsp_aborted, 0);
1722                 atomic_set(&tgtp->xmt_ls_rsp_cmpl, 0);
1723                 atomic_set(&tgtp->rcv_fcp_cmd_in, 0);
1724                 atomic_set(&tgtp->rcv_fcp_cmd_out, 0);
1725                 atomic_set(&tgtp->rcv_fcp_cmd_drop, 0);
1726                 atomic_set(&tgtp->xmt_fcp_drop, 0);
1727                 atomic_set(&tgtp->xmt_fcp_read_rsp, 0);
1728                 atomic_set(&tgtp->xmt_fcp_read, 0);
1729                 atomic_set(&tgtp->xmt_fcp_write, 0);
1730                 atomic_set(&tgtp->xmt_fcp_rsp, 0);
1731                 atomic_set(&tgtp->xmt_fcp_release, 0);
1732                 atomic_set(&tgtp->xmt_fcp_rsp_cmpl, 0);
1733                 atomic_set(&tgtp->xmt_fcp_rsp_error, 0);
1734                 atomic_set(&tgtp->xmt_fcp_rsp_xb_set, 0);
1735                 atomic_set(&tgtp->xmt_fcp_rsp_aborted, 0);
1736                 atomic_set(&tgtp->xmt_fcp_rsp_drop, 0);
1737                 atomic_set(&tgtp->xmt_fcp_xri_abort_cqe, 0);
1738                 atomic_set(&tgtp->xmt_fcp_abort, 0);
1739                 atomic_set(&tgtp->xmt_fcp_abort_cmpl, 0);
1740                 atomic_set(&tgtp->xmt_abort_unsol, 0);
1741                 atomic_set(&tgtp->xmt_abort_sol, 0);
1742                 atomic_set(&tgtp->xmt_abort_rsp, 0);
1743                 atomic_set(&tgtp->xmt_abort_rsp_error, 0);
1744                 atomic_set(&tgtp->defer_ctx, 0);
1745                 atomic_set(&tgtp->defer_fod, 0);
1746                 atomic_set(&tgtp->defer_wqfull, 0);
1747         }
1748         return error;
1749 }
1750
1751 int
1752 lpfc_nvmet_update_targetport(struct lpfc_hba *phba)
1753 {
1754         struct lpfc_vport  *vport = phba->pport;
1755
1756         if (!phba->targetport)
1757                 return 0;
1758
1759         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
1760                          "6007 Update NVMET port x%px did x%x\n",
1761                          phba->targetport, vport->fc_myDID);
1762
1763         phba->targetport->port_id = vport->fc_myDID;
1764         return 0;
1765 }
1766
1767 /**
1768  * lpfc_sli4_nvmet_xri_aborted - Fast-path process of nvmet xri abort
1769  * @phba: pointer to lpfc hba data structure.
1770  * @axri: pointer to the nvmet xri abort wcqe structure.
1771  *
1772  * This routine is invoked by the worker thread to process a SLI4 fast-path
1773  * NVMET aborted xri.
1774  **/
1775 void
1776 lpfc_sli4_nvmet_xri_aborted(struct lpfc_hba *phba,
1777                             struct sli4_wcqe_xri_aborted *axri)
1778 {
1779 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
1780         uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
1781         uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
1782         struct lpfc_async_xchg_ctx *ctxp, *next_ctxp;
1783         struct lpfc_nvmet_tgtport *tgtp;
1784         struct nvmefc_tgt_fcp_req *req = NULL;
1785         struct lpfc_nodelist *ndlp;
1786         unsigned long iflag = 0;
1787         int rrq_empty = 0;
1788         bool released = false;
1789
1790         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1791                         "6317 XB aborted xri x%x rxid x%x\n", xri, rxid);
1792
1793         if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_NVME))
1794                 return;
1795
1796         if (phba->targetport) {
1797                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
1798                 atomic_inc(&tgtp->xmt_fcp_xri_abort_cqe);
1799         }
1800
1801         spin_lock_irqsave(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1802         list_for_each_entry_safe(ctxp, next_ctxp,
1803                                  &phba->sli4_hba.lpfc_abts_nvmet_ctx_list,
1804                                  list) {
1805                 if (ctxp->ctxbuf->sglq->sli4_xritag != xri)
1806                         continue;
1807
1808                 spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock,
1809                                        iflag);
1810
1811                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
1812                 /* Check if we already received a free context call
1813                  * and we have completed processing an abort situation.
1814                  */
1815                 if (ctxp->flag & LPFC_NVME_CTX_RLS &&
1816                     !(ctxp->flag & LPFC_NVME_ABORT_OP)) {
1817                         spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1818                         list_del_init(&ctxp->list);
1819                         spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1820                         released = true;
1821                 }
1822                 ctxp->flag &= ~LPFC_NVME_XBUSY;
1823                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1824
1825                 spin_lock_irqsave(&phba->rrq_list_lock, iflag);
1826                 rrq_empty = list_empty(&phba->active_rrq_list);
1827                 spin_unlock_irqrestore(&phba->rrq_list_lock, iflag);
1828                 ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
1829                 if (ndlp &&
1830                     (ndlp->nlp_state == NLP_STE_UNMAPPED_NODE ||
1831                      ndlp->nlp_state == NLP_STE_MAPPED_NODE)) {
1832                         lpfc_set_rrq_active(phba, ndlp,
1833                                 ctxp->ctxbuf->sglq->sli4_lxritag,
1834                                 rxid, 1);
1835                         lpfc_sli4_abts_err_handler(phba, ndlp, axri);
1836                 }
1837
1838                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1839                                 "6318 XB aborted oxid x%x flg x%x (%x)\n",
1840                                 ctxp->oxid, ctxp->flag, released);
1841                 if (released)
1842                         lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
1843
1844                 if (rrq_empty)
1845                         lpfc_worker_wake_up(phba);
1846                 return;
1847         }
1848         spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1849         ctxp = lpfc_nvmet_get_ctx_for_xri(phba, xri);
1850         if (ctxp) {
1851                 /*
1852                  *  Abort already done by FW, so BA_ACC sent.
1853                  *  However, the transport may be unaware.
1854                  */
1855                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1856                                 "6323 NVMET Rcv ABTS xri x%x ctxp state x%x "
1857                                 "flag x%x oxid x%x rxid x%x\n",
1858                                 xri, ctxp->state, ctxp->flag, ctxp->oxid,
1859                                 rxid);
1860
1861                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
1862                 ctxp->flag |= LPFC_NVME_ABTS_RCV;
1863                 ctxp->state = LPFC_NVME_STE_ABORT;
1864                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1865
1866                 lpfc_nvmeio_data(phba,
1867                                  "NVMET ABTS RCV: xri x%x CPU %02x rjt %d\n",
1868                                  xri, raw_smp_processor_id(), 0);
1869
1870                 req = &ctxp->hdlrctx.fcp_req;
1871                 if (req)
1872                         nvmet_fc_rcv_fcp_abort(phba->targetport, req);
1873         }
1874 #endif
1875 }
1876
1877 int
1878 lpfc_nvmet_rcv_unsol_abort(struct lpfc_vport *vport,
1879                            struct fc_frame_header *fc_hdr)
1880 {
1881 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
1882         struct lpfc_hba *phba = vport->phba;
1883         struct lpfc_async_xchg_ctx *ctxp, *next_ctxp;
1884         struct nvmefc_tgt_fcp_req *rsp;
1885         uint32_t sid;
1886         uint16_t oxid, xri;
1887         unsigned long iflag = 0;
1888
1889         sid = sli4_sid_from_fc_hdr(fc_hdr);
1890         oxid = be16_to_cpu(fc_hdr->fh_ox_id);
1891
1892         spin_lock_irqsave(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1893         list_for_each_entry_safe(ctxp, next_ctxp,
1894                                  &phba->sli4_hba.lpfc_abts_nvmet_ctx_list,
1895                                  list) {
1896                 if (ctxp->oxid != oxid || ctxp->sid != sid)
1897                         continue;
1898
1899                 xri = ctxp->ctxbuf->sglq->sli4_xritag;
1900
1901                 spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock,
1902                                        iflag);
1903                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
1904                 ctxp->flag |= LPFC_NVME_ABTS_RCV;
1905                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1906
1907                 lpfc_nvmeio_data(phba,
1908                         "NVMET ABTS RCV: xri x%x CPU %02x rjt %d\n",
1909                         xri, raw_smp_processor_id(), 0);
1910
1911                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1912                                 "6319 NVMET Rcv ABTS:acc xri x%x\n", xri);
1913
1914                 rsp = &ctxp->hdlrctx.fcp_req;
1915                 nvmet_fc_rcv_fcp_abort(phba->targetport, rsp);
1916
1917                 /* Respond with BA_ACC accordingly */
1918                 lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 1);
1919                 return 0;
1920         }
1921         spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1922         /* check the wait list */
1923         if (phba->sli4_hba.nvmet_io_wait_cnt) {
1924                 struct rqb_dmabuf *nvmebuf;
1925                 struct fc_frame_header *fc_hdr_tmp;
1926                 u32 sid_tmp;
1927                 u16 oxid_tmp;
1928                 bool found = false;
1929
1930                 spin_lock_irqsave(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
1931
1932                 /* match by oxid and s_id */
1933                 list_for_each_entry(nvmebuf,
1934                                     &phba->sli4_hba.lpfc_nvmet_io_wait_list,
1935                                     hbuf.list) {
1936                         fc_hdr_tmp = (struct fc_frame_header *)
1937                                         (nvmebuf->hbuf.virt);
1938                         oxid_tmp = be16_to_cpu(fc_hdr_tmp->fh_ox_id);
1939                         sid_tmp = sli4_sid_from_fc_hdr(fc_hdr_tmp);
1940                         if (oxid_tmp != oxid || sid_tmp != sid)
1941                                 continue;
1942
1943                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1944                                         "6321 NVMET Rcv ABTS oxid x%x from x%x "
1945                                         "is waiting for a ctxp\n",
1946                                         oxid, sid);
1947
1948                         list_del_init(&nvmebuf->hbuf.list);
1949                         phba->sli4_hba.nvmet_io_wait_cnt--;
1950                         found = true;
1951                         break;
1952                 }
1953                 spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock,
1954                                        iflag);
1955
1956                 /* free buffer since already posted a new DMA buffer to RQ */
1957                 if (found) {
1958                         nvmebuf->hrq->rqbp->rqb_free_buffer(phba, nvmebuf);
1959                         /* Respond with BA_ACC accordingly */
1960                         lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 1);
1961                         return 0;
1962                 }
1963         }
1964
1965         /* check active list */
1966         ctxp = lpfc_nvmet_get_ctx_for_oxid(phba, oxid, sid);
1967         if (ctxp) {
1968                 xri = ctxp->ctxbuf->sglq->sli4_xritag;
1969
1970                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
1971                 ctxp->flag |= (LPFC_NVME_ABTS_RCV | LPFC_NVME_ABORT_OP);
1972                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1973
1974                 lpfc_nvmeio_data(phba,
1975                                  "NVMET ABTS RCV: xri x%x CPU %02x rjt %d\n",
1976                                  xri, raw_smp_processor_id(), 0);
1977
1978                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1979                                 "6322 NVMET Rcv ABTS:acc oxid x%x xri x%x "
1980                                 "flag x%x state x%x\n",
1981                                 ctxp->oxid, xri, ctxp->flag, ctxp->state);
1982
1983                 if (ctxp->flag & LPFC_NVME_TNOTIFY) {
1984                         /* Notify the transport */
1985                         nvmet_fc_rcv_fcp_abort(phba->targetport,
1986                                                &ctxp->hdlrctx.fcp_req);
1987                 } else {
1988                         cancel_work_sync(&ctxp->ctxbuf->defer_work);
1989                         spin_lock_irqsave(&ctxp->ctxlock, iflag);
1990                         lpfc_nvmet_defer_release(phba, ctxp);
1991                         spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1992                 }
1993                 lpfc_nvmet_sol_fcp_issue_abort(phba, ctxp, ctxp->sid,
1994                                                ctxp->oxid);
1995
1996                 lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 1);
1997                 return 0;
1998         }
1999
2000         lpfc_nvmeio_data(phba, "NVMET ABTS RCV: oxid x%x CPU %02x rjt %d\n",
2001                          oxid, raw_smp_processor_id(), 1);
2002
2003         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
2004                         "6320 NVMET Rcv ABTS:rjt oxid x%x\n", oxid);
2005
2006         /* Respond with BA_RJT accordingly */
2007         lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 0);
2008 #endif
2009         return 0;
2010 }
2011
2012 static void
2013 lpfc_nvmet_wqfull_flush(struct lpfc_hba *phba, struct lpfc_queue *wq,
2014                         struct lpfc_async_xchg_ctx *ctxp)
2015 {
2016         struct lpfc_sli_ring *pring;
2017         struct lpfc_iocbq *nvmewqeq;
2018         struct lpfc_iocbq *next_nvmewqeq;
2019         unsigned long iflags;
2020         struct lpfc_wcqe_complete wcqe;
2021         struct lpfc_wcqe_complete *wcqep;
2022
2023         pring = wq->pring;
2024         wcqep = &wcqe;
2025
2026         /* Fake an ABORT error code back to cmpl routine */
2027         memset(wcqep, 0, sizeof(struct lpfc_wcqe_complete));
2028         bf_set(lpfc_wcqe_c_status, wcqep, IOSTAT_LOCAL_REJECT);
2029         wcqep->parameter = IOERR_ABORT_REQUESTED;
2030
2031         spin_lock_irqsave(&pring->ring_lock, iflags);
2032         list_for_each_entry_safe(nvmewqeq, next_nvmewqeq,
2033                                  &wq->wqfull_list, list) {
2034                 if (ctxp) {
2035                         /* Checking for a specific IO to flush */
2036                         if (nvmewqeq->context_un.axchg == ctxp) {
2037                                 list_del(&nvmewqeq->list);
2038                                 spin_unlock_irqrestore(&pring->ring_lock,
2039                                                        iflags);
2040                                 memcpy(&nvmewqeq->wcqe_cmpl, wcqep,
2041                                        sizeof(*wcqep));
2042                                 lpfc_nvmet_xmt_fcp_op_cmp(phba, nvmewqeq,
2043                                                           nvmewqeq);
2044                                 return;
2045                         }
2046                         continue;
2047                 } else {
2048                         /* Flush all IOs */
2049                         list_del(&nvmewqeq->list);
2050                         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2051                         memcpy(&nvmewqeq->wcqe_cmpl, wcqep, sizeof(*wcqep));
2052                         lpfc_nvmet_xmt_fcp_op_cmp(phba, nvmewqeq, nvmewqeq);
2053                         spin_lock_irqsave(&pring->ring_lock, iflags);
2054                 }
2055         }
2056         if (!ctxp)
2057                 wq->q_flag &= ~HBA_NVMET_WQFULL;
2058         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2059 }
2060
2061 void
2062 lpfc_nvmet_wqfull_process(struct lpfc_hba *phba,
2063                           struct lpfc_queue *wq)
2064 {
2065 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2066         struct lpfc_sli_ring *pring;
2067         struct lpfc_iocbq *nvmewqeq;
2068         struct lpfc_async_xchg_ctx *ctxp;
2069         unsigned long iflags;
2070         int rc;
2071
2072         /*
2073          * Some WQE slots are available, so try to re-issue anything
2074          * on the WQ wqfull_list.
2075          */
2076         pring = wq->pring;
2077         spin_lock_irqsave(&pring->ring_lock, iflags);
2078         while (!list_empty(&wq->wqfull_list)) {
2079                 list_remove_head(&wq->wqfull_list, nvmewqeq, struct lpfc_iocbq,
2080                                  list);
2081                 spin_unlock_irqrestore(&pring->ring_lock, iflags);
2082                 ctxp = nvmewqeq->context_un.axchg;
2083                 rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, nvmewqeq);
2084                 spin_lock_irqsave(&pring->ring_lock, iflags);
2085                 if (rc == -EBUSY) {
2086                         /* WQ was full again, so put it back on the list */
2087                         list_add(&nvmewqeq->list, &wq->wqfull_list);
2088                         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2089                         return;
2090                 }
2091                 if (rc == WQE_SUCCESS) {
2092 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2093                         if (ctxp->ts_cmd_nvme) {
2094                                 if (ctxp->hdlrctx.fcp_req.op == NVMET_FCOP_RSP)
2095                                         ctxp->ts_status_wqput = ktime_get_ns();
2096                                 else
2097                                         ctxp->ts_data_wqput = ktime_get_ns();
2098                         }
2099 #endif
2100                 } else {
2101                         WARN_ON(rc);
2102                 }
2103         }
2104         wq->q_flag &= ~HBA_NVMET_WQFULL;
2105         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2106
2107 #endif
2108 }
2109
2110 void
2111 lpfc_nvmet_destroy_targetport(struct lpfc_hba *phba)
2112 {
2113 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2114         struct lpfc_nvmet_tgtport *tgtp;
2115         struct lpfc_queue *wq;
2116         uint32_t qidx;
2117         DECLARE_COMPLETION_ONSTACK(tport_unreg_cmp);
2118
2119         if (phba->nvmet_support == 0)
2120                 return;
2121         if (phba->targetport) {
2122                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2123                 for (qidx = 0; qidx < phba->cfg_hdw_queue; qidx++) {
2124                         wq = phba->sli4_hba.hdwq[qidx].io_wq;
2125                         lpfc_nvmet_wqfull_flush(phba, wq, NULL);
2126                 }
2127                 tgtp->tport_unreg_cmp = &tport_unreg_cmp;
2128                 nvmet_fc_unregister_targetport(phba->targetport);
2129                 if (!wait_for_completion_timeout(&tport_unreg_cmp,
2130                                         msecs_to_jiffies(LPFC_NVMET_WAIT_TMO)))
2131                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2132                                         "6179 Unreg targetport x%px timeout "
2133                                         "reached.\n", phba->targetport);
2134                 lpfc_nvmet_cleanup_io_context(phba);
2135         }
2136         phba->targetport = NULL;
2137 #endif
2138 }
2139
2140 /**
2141  * lpfc_nvmet_handle_lsreq - Process an NVME LS request
2142  * @phba: pointer to lpfc hba data structure.
2143  * @axchg: pointer to exchange context for the NVME LS request
2144  *
2145  * This routine is used for processing an asynchronously received NVME LS
2146  * request. Any remaining validation is done and the LS is then forwarded
2147  * to the nvmet-fc transport via nvmet_fc_rcv_ls_req().
2148  *
2149  * The calling sequence should be: nvmet_fc_rcv_ls_req() -> (processing)
2150  * -> lpfc_nvmet_xmt_ls_rsp/cmp -> req->done.
2151  * lpfc_nvme_xmt_ls_rsp_cmp should free the allocated axchg.
2152  *
2153  * Returns 0 if LS was handled and delivered to the transport
2154  * Returns 1 if LS failed to be handled and should be dropped
2155  */
2156 int
2157 lpfc_nvmet_handle_lsreq(struct lpfc_hba *phba,
2158                         struct lpfc_async_xchg_ctx *axchg)
2159 {
2160 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2161         struct lpfc_nvmet_tgtport *tgtp = phba->targetport->private;
2162         uint32_t *payload = axchg->payload;
2163         int rc;
2164
2165         atomic_inc(&tgtp->rcv_ls_req_in);
2166
2167         /*
2168          * Driver passes the ndlp as the hosthandle argument allowing
2169          * the transport to generate LS requests for any associateions
2170          * that are created.
2171          */
2172         rc = nvmet_fc_rcv_ls_req(phba->targetport, axchg->ndlp, &axchg->ls_rsp,
2173                                  axchg->payload, axchg->size);
2174
2175         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
2176                         "6037 NVMET Unsol rcv: sz %d rc %d: %08x %08x %08x "
2177                         "%08x %08x %08x\n", axchg->size, rc,
2178                         *payload, *(payload+1), *(payload+2),
2179                         *(payload+3), *(payload+4), *(payload+5));
2180
2181         if (!rc) {
2182                 atomic_inc(&tgtp->rcv_ls_req_out);
2183                 return 0;
2184         }
2185
2186         atomic_inc(&tgtp->rcv_ls_req_drop);
2187 #endif
2188         return 1;
2189 }
2190
2191 static void
2192 lpfc_nvmet_process_rcv_fcp_req(struct lpfc_nvmet_ctxbuf *ctx_buf)
2193 {
2194 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2195         struct lpfc_async_xchg_ctx *ctxp = ctx_buf->context;
2196         struct lpfc_hba *phba = ctxp->phba;
2197         struct rqb_dmabuf *nvmebuf = ctxp->rqb_buffer;
2198         struct lpfc_nvmet_tgtport *tgtp;
2199         uint32_t *payload, qno;
2200         uint32_t rc;
2201         unsigned long iflags;
2202
2203         if (!nvmebuf) {
2204                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2205                         "6159 process_rcv_fcp_req, nvmebuf is NULL, "
2206                         "oxid: x%x flg: x%x state: x%x\n",
2207                         ctxp->oxid, ctxp->flag, ctxp->state);
2208                 spin_lock_irqsave(&ctxp->ctxlock, iflags);
2209                 lpfc_nvmet_defer_release(phba, ctxp);
2210                 spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2211                 lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid,
2212                                                  ctxp->oxid);
2213                 return;
2214         }
2215
2216         if (ctxp->flag & LPFC_NVME_ABTS_RCV) {
2217                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2218                                 "6324 IO oxid x%x aborted\n",
2219                                 ctxp->oxid);
2220                 return;
2221         }
2222
2223         payload = (uint32_t *)(nvmebuf->dbuf.virt);
2224         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2225         ctxp->flag |= LPFC_NVME_TNOTIFY;
2226 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2227         if (ctxp->ts_isr_cmd)
2228                 ctxp->ts_cmd_nvme = ktime_get_ns();
2229 #endif
2230         /*
2231          * The calling sequence should be:
2232          * nvmet_fc_rcv_fcp_req->lpfc_nvmet_xmt_fcp_op/cmp- req->done
2233          * lpfc_nvmet_xmt_fcp_op_cmp should free the allocated ctxp.
2234          * When we return from nvmet_fc_rcv_fcp_req, all relevant info
2235          * the NVME command / FC header is stored.
2236          * A buffer has already been reposted for this IO, so just free
2237          * the nvmebuf.
2238          */
2239         rc = nvmet_fc_rcv_fcp_req(phba->targetport, &ctxp->hdlrctx.fcp_req,
2240                                   payload, ctxp->size);
2241         /* Process FCP command */
2242         if (rc == 0) {
2243                 atomic_inc(&tgtp->rcv_fcp_cmd_out);
2244                 spin_lock_irqsave(&ctxp->ctxlock, iflags);
2245                 if ((ctxp->flag & LPFC_NVME_CTX_REUSE_WQ) ||
2246                     (nvmebuf != ctxp->rqb_buffer)) {
2247                         spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2248                         return;
2249                 }
2250                 ctxp->rqb_buffer = NULL;
2251                 spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2252                 lpfc_rq_buf_free(phba, &nvmebuf->hbuf); /* repost */
2253                 return;
2254         }
2255
2256         /* Processing of FCP command is deferred */
2257         if (rc == -EOVERFLOW) {
2258                 lpfc_nvmeio_data(phba, "NVMET RCV BUSY: xri x%x sz %d "
2259                                  "from %06x\n",
2260                                  ctxp->oxid, ctxp->size, ctxp->sid);
2261                 atomic_inc(&tgtp->rcv_fcp_cmd_out);
2262                 atomic_inc(&tgtp->defer_fod);
2263                 spin_lock_irqsave(&ctxp->ctxlock, iflags);
2264                 if (ctxp->flag & LPFC_NVME_CTX_REUSE_WQ) {
2265                         spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2266                         return;
2267                 }
2268                 spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2269                 /*
2270                  * Post a replacement DMA buffer to RQ and defer
2271                  * freeing rcv buffer till .defer_rcv callback
2272                  */
2273                 qno = nvmebuf->idx;
2274                 lpfc_post_rq_buffer(
2275                         phba, phba->sli4_hba.nvmet_mrq_hdr[qno],
2276                         phba->sli4_hba.nvmet_mrq_data[qno], 1, qno);
2277                 return;
2278         }
2279         ctxp->flag &= ~LPFC_NVME_TNOTIFY;
2280         atomic_inc(&tgtp->rcv_fcp_cmd_drop);
2281         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2282                         "2582 FCP Drop IO x%x: err x%x: x%x x%x x%x\n",
2283                         ctxp->oxid, rc,
2284                         atomic_read(&tgtp->rcv_fcp_cmd_in),
2285                         atomic_read(&tgtp->rcv_fcp_cmd_out),
2286                         atomic_read(&tgtp->xmt_fcp_release));
2287         lpfc_nvmeio_data(phba, "NVMET FCP DROP: xri x%x sz %d from %06x\n",
2288                          ctxp->oxid, ctxp->size, ctxp->sid);
2289         spin_lock_irqsave(&ctxp->ctxlock, iflags);
2290         lpfc_nvmet_defer_release(phba, ctxp);
2291         spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2292         lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid, ctxp->oxid);
2293 #endif
2294 }
2295
2296 static void
2297 lpfc_nvmet_fcp_rqst_defer_work(struct work_struct *work)
2298 {
2299 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2300         struct lpfc_nvmet_ctxbuf *ctx_buf =
2301                 container_of(work, struct lpfc_nvmet_ctxbuf, defer_work);
2302
2303         lpfc_nvmet_process_rcv_fcp_req(ctx_buf);
2304 #endif
2305 }
2306
2307 static struct lpfc_nvmet_ctxbuf *
2308 lpfc_nvmet_replenish_context(struct lpfc_hba *phba,
2309                              struct lpfc_nvmet_ctx_info *current_infop)
2310 {
2311 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2312         struct lpfc_nvmet_ctxbuf *ctx_buf = NULL;
2313         struct lpfc_nvmet_ctx_info *get_infop;
2314         int i;
2315
2316         /*
2317          * The current_infop for the MRQ a NVME command IU was received
2318          * on is empty. Our goal is to replenish this MRQs context
2319          * list from a another CPUs.
2320          *
2321          * First we need to pick a context list to start looking on.
2322          * nvmet_ctx_start_cpu has available context the last time
2323          * we needed to replenish this CPU where nvmet_ctx_next_cpu
2324          * is just the next sequential CPU for this MRQ.
2325          */
2326         if (current_infop->nvmet_ctx_start_cpu)
2327                 get_infop = current_infop->nvmet_ctx_start_cpu;
2328         else
2329                 get_infop = current_infop->nvmet_ctx_next_cpu;
2330
2331         for (i = 0; i < phba->sli4_hba.num_possible_cpu; i++) {
2332                 if (get_infop == current_infop) {
2333                         get_infop = get_infop->nvmet_ctx_next_cpu;
2334                         continue;
2335                 }
2336                 spin_lock(&get_infop->nvmet_ctx_list_lock);
2337
2338                 /* Just take the entire context list, if there are any */
2339                 if (get_infop->nvmet_ctx_list_cnt) {
2340                         list_splice_init(&get_infop->nvmet_ctx_list,
2341                                     &current_infop->nvmet_ctx_list);
2342                         current_infop->nvmet_ctx_list_cnt =
2343                                 get_infop->nvmet_ctx_list_cnt - 1;
2344                         get_infop->nvmet_ctx_list_cnt = 0;
2345                         spin_unlock(&get_infop->nvmet_ctx_list_lock);
2346
2347                         current_infop->nvmet_ctx_start_cpu = get_infop;
2348                         list_remove_head(&current_infop->nvmet_ctx_list,
2349                                          ctx_buf, struct lpfc_nvmet_ctxbuf,
2350                                          list);
2351                         return ctx_buf;
2352                 }
2353
2354                 /* Otherwise, move on to the next CPU for this MRQ */
2355                 spin_unlock(&get_infop->nvmet_ctx_list_lock);
2356                 get_infop = get_infop->nvmet_ctx_next_cpu;
2357         }
2358
2359 #endif
2360         /* Nothing found, all contexts for the MRQ are in-flight */
2361         return NULL;
2362 }
2363
2364 /**
2365  * lpfc_nvmet_unsol_fcp_buffer - Process an unsolicited event data buffer
2366  * @phba: pointer to lpfc hba data structure.
2367  * @idx: relative index of MRQ vector
2368  * @nvmebuf: pointer to lpfc nvme command HBQ data structure.
2369  * @isr_timestamp: in jiffies.
2370  * @cqflag: cq processing information regarding workload.
2371  *
2372  * This routine is used for processing the WQE associated with a unsolicited
2373  * event. It first determines whether there is an existing ndlp that matches
2374  * the DID from the unsolicited WQE. If not, it will create a new one with
2375  * the DID from the unsolicited WQE. The ELS command from the unsolicited
2376  * WQE is then used to invoke the proper routine and to set up proper state
2377  * of the discovery state machine.
2378  **/
2379 static void
2380 lpfc_nvmet_unsol_fcp_buffer(struct lpfc_hba *phba,
2381                             uint32_t idx,
2382                             struct rqb_dmabuf *nvmebuf,
2383                             uint64_t isr_timestamp,
2384                             uint8_t cqflag)
2385 {
2386         struct lpfc_async_xchg_ctx *ctxp;
2387         struct lpfc_nvmet_tgtport *tgtp;
2388         struct fc_frame_header *fc_hdr;
2389         struct lpfc_nvmet_ctxbuf *ctx_buf;
2390         struct lpfc_nvmet_ctx_info *current_infop;
2391         uint32_t size, oxid, sid, qno;
2392         unsigned long iflag;
2393         int current_cpu;
2394
2395         if (!IS_ENABLED(CONFIG_NVME_TARGET_FC))
2396                 return;
2397
2398         ctx_buf = NULL;
2399         if (!nvmebuf || !phba->targetport) {
2400                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2401                                 "6157 NVMET FCP Drop IO\n");
2402                 if (nvmebuf)
2403                         lpfc_rq_buf_free(phba, &nvmebuf->hbuf);
2404                 return;
2405         }
2406
2407         /*
2408          * Get a pointer to the context list for this MRQ based on
2409          * the CPU this MRQ IRQ is associated with. If the CPU association
2410          * changes from our initial assumption, the context list could
2411          * be empty, thus it would need to be replenished with the
2412          * context list from another CPU for this MRQ.
2413          */
2414         current_cpu = raw_smp_processor_id();
2415         current_infop = lpfc_get_ctx_list(phba, current_cpu, idx);
2416         spin_lock_irqsave(&current_infop->nvmet_ctx_list_lock, iflag);
2417         if (current_infop->nvmet_ctx_list_cnt) {
2418                 list_remove_head(&current_infop->nvmet_ctx_list,
2419                                  ctx_buf, struct lpfc_nvmet_ctxbuf, list);
2420                 current_infop->nvmet_ctx_list_cnt--;
2421         } else {
2422                 ctx_buf = lpfc_nvmet_replenish_context(phba, current_infop);
2423         }
2424         spin_unlock_irqrestore(&current_infop->nvmet_ctx_list_lock, iflag);
2425
2426         fc_hdr = (struct fc_frame_header *)(nvmebuf->hbuf.virt);
2427         oxid = be16_to_cpu(fc_hdr->fh_ox_id);
2428         size = nvmebuf->bytes_recv;
2429
2430 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2431         if (phba->hdwqstat_on & LPFC_CHECK_NVMET_IO) {
2432                 this_cpu_inc(phba->sli4_hba.c_stat->rcv_io);
2433                 if (idx != current_cpu)
2434                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
2435                                         "6703 CPU Check rcv: "
2436                                         "cpu %d expect %d\n",
2437                                         current_cpu, idx);
2438         }
2439 #endif
2440
2441         lpfc_nvmeio_data(phba, "NVMET FCP  RCV: xri x%x sz %d CPU %02x\n",
2442                          oxid, size, raw_smp_processor_id());
2443
2444         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2445
2446         if (!ctx_buf) {
2447                 /* Queue this NVME IO to process later */
2448                 spin_lock_irqsave(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
2449                 list_add_tail(&nvmebuf->hbuf.list,
2450                               &phba->sli4_hba.lpfc_nvmet_io_wait_list);
2451                 phba->sli4_hba.nvmet_io_wait_cnt++;
2452                 phba->sli4_hba.nvmet_io_wait_total++;
2453                 spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock,
2454                                        iflag);
2455
2456                 /* Post a brand new DMA buffer to RQ */
2457                 qno = nvmebuf->idx;
2458                 lpfc_post_rq_buffer(
2459                         phba, phba->sli4_hba.nvmet_mrq_hdr[qno],
2460                         phba->sli4_hba.nvmet_mrq_data[qno], 1, qno);
2461
2462                 atomic_inc(&tgtp->defer_ctx);
2463                 return;
2464         }
2465
2466         sid = sli4_sid_from_fc_hdr(fc_hdr);
2467
2468         ctxp = (struct lpfc_async_xchg_ctx *)ctx_buf->context;
2469         spin_lock_irqsave(&phba->sli4_hba.t_active_list_lock, iflag);
2470         list_add_tail(&ctxp->list, &phba->sli4_hba.t_active_ctx_list);
2471         spin_unlock_irqrestore(&phba->sli4_hba.t_active_list_lock, iflag);
2472         if (ctxp->state != LPFC_NVME_STE_FREE) {
2473                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2474                                 "6414 NVMET Context corrupt %d %d oxid x%x\n",
2475                                 ctxp->state, ctxp->entry_cnt, ctxp->oxid);
2476         }
2477         ctxp->wqeq = NULL;
2478         ctxp->offset = 0;
2479         ctxp->phba = phba;
2480         ctxp->size = size;
2481         ctxp->oxid = oxid;
2482         ctxp->sid = sid;
2483         ctxp->idx = idx;
2484         ctxp->state = LPFC_NVME_STE_RCV;
2485         ctxp->entry_cnt = 1;
2486         ctxp->flag = 0;
2487         ctxp->ctxbuf = ctx_buf;
2488         ctxp->rqb_buffer = (void *)nvmebuf;
2489         ctxp->hdwq = NULL;
2490         spin_lock_init(&ctxp->ctxlock);
2491
2492 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2493         if (isr_timestamp)
2494                 ctxp->ts_isr_cmd = isr_timestamp;
2495         ctxp->ts_cmd_nvme = 0;
2496         ctxp->ts_nvme_data = 0;
2497         ctxp->ts_data_wqput = 0;
2498         ctxp->ts_isr_data = 0;
2499         ctxp->ts_data_nvme = 0;
2500         ctxp->ts_nvme_status = 0;
2501         ctxp->ts_status_wqput = 0;
2502         ctxp->ts_isr_status = 0;
2503         ctxp->ts_status_nvme = 0;
2504 #endif
2505
2506         atomic_inc(&tgtp->rcv_fcp_cmd_in);
2507         /* check for cq processing load */
2508         if (!cqflag) {
2509                 lpfc_nvmet_process_rcv_fcp_req(ctx_buf);
2510                 return;
2511         }
2512
2513         if (!queue_work(phba->wq, &ctx_buf->defer_work)) {
2514                 atomic_inc(&tgtp->rcv_fcp_cmd_drop);
2515                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2516                                 "6325 Unable to queue work for oxid x%x. "
2517                                 "FCP Drop IO [x%x x%x x%x]\n",
2518                                 ctxp->oxid,
2519                                 atomic_read(&tgtp->rcv_fcp_cmd_in),
2520                                 atomic_read(&tgtp->rcv_fcp_cmd_out),
2521                                 atomic_read(&tgtp->xmt_fcp_release));
2522
2523                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
2524                 lpfc_nvmet_defer_release(phba, ctxp);
2525                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
2526                 lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, sid, oxid);
2527         }
2528 }
2529
2530 /**
2531  * lpfc_nvmet_unsol_fcp_event - Process an unsolicited event from an nvme nport
2532  * @phba: pointer to lpfc hba data structure.
2533  * @idx: relative index of MRQ vector
2534  * @nvmebuf: pointer to received nvme data structure.
2535  * @isr_timestamp: in jiffies.
2536  * @cqflag: cq processing information regarding workload.
2537  *
2538  * This routine is used to process an unsolicited event received from a SLI
2539  * (Service Level Interface) ring. The actual processing of the data buffer
2540  * associated with the unsolicited event is done by invoking the routine
2541  * lpfc_nvmet_unsol_fcp_buffer() after properly set up the buffer from the
2542  * SLI RQ on which the unsolicited event was received.
2543  **/
2544 void
2545 lpfc_nvmet_unsol_fcp_event(struct lpfc_hba *phba,
2546                            uint32_t idx,
2547                            struct rqb_dmabuf *nvmebuf,
2548                            uint64_t isr_timestamp,
2549                            uint8_t cqflag)
2550 {
2551         if (!nvmebuf) {
2552                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2553                                 "3167 NVMET FCP Drop IO\n");
2554                 return;
2555         }
2556         if (phba->nvmet_support == 0) {
2557                 lpfc_rq_buf_free(phba, &nvmebuf->hbuf);
2558                 return;
2559         }
2560         lpfc_nvmet_unsol_fcp_buffer(phba, idx, nvmebuf, isr_timestamp, cqflag);
2561 }
2562
2563 /**
2564  * lpfc_nvmet_prep_ls_wqe - Allocate and prepare a lpfc wqe data structure
2565  * @phba: pointer to a host N_Port data structure.
2566  * @ctxp: Context info for NVME LS Request
2567  * @rspbuf: DMA buffer of NVME command.
2568  * @rspsize: size of the NVME command.
2569  *
2570  * This routine is used for allocating a lpfc-WQE data structure from
2571  * the driver lpfc-WQE free-list and prepare the WQE with the parameters
2572  * passed into the routine for discovery state machine to issue an Extended
2573  * Link Service (NVME) commands. It is a generic lpfc-WQE allocation
2574  * and preparation routine that is used by all the discovery state machine
2575  * routines and the NVME command-specific fields will be later set up by
2576  * the individual discovery machine routines after calling this routine
2577  * allocating and preparing a generic WQE data structure. It fills in the
2578  * Buffer Descriptor Entries (BDEs), allocates buffers for both command
2579  * payload and response payload (if expected). The reference count on the
2580  * ndlp is incremented by 1 and the reference to the ndlp is put into
2581  * context1 of the WQE data structure for this WQE to hold the ndlp
2582  * reference for the command's callback function to access later.
2583  *
2584  * Return code
2585  *   Pointer to the newly allocated/prepared nvme wqe data structure
2586  *   NULL - when nvme wqe data structure allocation/preparation failed
2587  **/
2588 static struct lpfc_iocbq *
2589 lpfc_nvmet_prep_ls_wqe(struct lpfc_hba *phba,
2590                        struct lpfc_async_xchg_ctx *ctxp,
2591                        dma_addr_t rspbuf, uint16_t rspsize)
2592 {
2593         struct lpfc_nodelist *ndlp;
2594         struct lpfc_iocbq *nvmewqe;
2595         union lpfc_wqe128 *wqe;
2596
2597         if (!lpfc_is_link_up(phba)) {
2598                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2599                                 "6104 NVMET prep LS wqe: link err: "
2600                                 "NPORT x%x oxid:x%x ste %d\n",
2601                                 ctxp->sid, ctxp->oxid, ctxp->state);
2602                 return NULL;
2603         }
2604
2605         /* Allocate buffer for  command wqe */
2606         nvmewqe = lpfc_sli_get_iocbq(phba);
2607         if (nvmewqe == NULL) {
2608                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2609                                 "6105 NVMET prep LS wqe: No WQE: "
2610                                 "NPORT x%x oxid x%x ste %d\n",
2611                                 ctxp->sid, ctxp->oxid, ctxp->state);
2612                 return NULL;
2613         }
2614
2615         ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
2616         if (!ndlp ||
2617             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
2618             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
2619                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2620                                 "6106 NVMET prep LS wqe: No ndlp: "
2621                                 "NPORT x%x oxid x%x ste %d\n",
2622                                 ctxp->sid, ctxp->oxid, ctxp->state);
2623                 goto nvme_wqe_free_wqeq_exit;
2624         }
2625         ctxp->wqeq = nvmewqe;
2626
2627         /* prevent preparing wqe with NULL ndlp reference */
2628         nvmewqe->ndlp = lpfc_nlp_get(ndlp);
2629         if (!nvmewqe->ndlp)
2630                 goto nvme_wqe_free_wqeq_exit;
2631         nvmewqe->context_un.axchg = ctxp;
2632
2633         wqe = &nvmewqe->wqe;
2634         memset(wqe, 0, sizeof(union lpfc_wqe));
2635
2636         /* Words 0 - 2 */
2637         wqe->xmit_sequence.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2638         wqe->xmit_sequence.bde.tus.f.bdeSize = rspsize;
2639         wqe->xmit_sequence.bde.addrLow = le32_to_cpu(putPaddrLow(rspbuf));
2640         wqe->xmit_sequence.bde.addrHigh = le32_to_cpu(putPaddrHigh(rspbuf));
2641
2642         /* Word 3 */
2643
2644         /* Word 4 */
2645
2646         /* Word 5 */
2647         bf_set(wqe_dfctl, &wqe->xmit_sequence.wge_ctl, 0);
2648         bf_set(wqe_ls, &wqe->xmit_sequence.wge_ctl, 1);
2649         bf_set(wqe_la, &wqe->xmit_sequence.wge_ctl, 0);
2650         bf_set(wqe_rctl, &wqe->xmit_sequence.wge_ctl, FC_RCTL_ELS4_REP);
2651         bf_set(wqe_type, &wqe->xmit_sequence.wge_ctl, FC_TYPE_NVME);
2652
2653         /* Word 6 */
2654         bf_set(wqe_ctxt_tag, &wqe->xmit_sequence.wqe_com,
2655                phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2656         bf_set(wqe_xri_tag, &wqe->xmit_sequence.wqe_com, nvmewqe->sli4_xritag);
2657
2658         /* Word 7 */
2659         bf_set(wqe_cmnd, &wqe->xmit_sequence.wqe_com,
2660                CMD_XMIT_SEQUENCE64_WQE);
2661         bf_set(wqe_ct, &wqe->xmit_sequence.wqe_com, SLI4_CT_RPI);
2662         bf_set(wqe_class, &wqe->xmit_sequence.wqe_com, CLASS3);
2663         bf_set(wqe_pu, &wqe->xmit_sequence.wqe_com, 0);
2664
2665         /* Word 8 */
2666         wqe->xmit_sequence.wqe_com.abort_tag = nvmewqe->iotag;
2667
2668         /* Word 9 */
2669         bf_set(wqe_reqtag, &wqe->xmit_sequence.wqe_com, nvmewqe->iotag);
2670         /* Needs to be set by caller */
2671         bf_set(wqe_rcvoxid, &wqe->xmit_sequence.wqe_com, ctxp->oxid);
2672
2673         /* Word 10 */
2674         bf_set(wqe_dbde, &wqe->xmit_sequence.wqe_com, 1);
2675         bf_set(wqe_iod, &wqe->xmit_sequence.wqe_com, LPFC_WQE_IOD_WRITE);
2676         bf_set(wqe_lenloc, &wqe->xmit_sequence.wqe_com,
2677                LPFC_WQE_LENLOC_WORD12);
2678         bf_set(wqe_ebde_cnt, &wqe->xmit_sequence.wqe_com, 0);
2679
2680         /* Word 11 */
2681         bf_set(wqe_cqid, &wqe->xmit_sequence.wqe_com,
2682                LPFC_WQE_CQ_ID_DEFAULT);
2683         bf_set(wqe_cmd_type, &wqe->xmit_sequence.wqe_com,
2684                OTHER_COMMAND);
2685
2686         /* Word 12 */
2687         wqe->xmit_sequence.xmit_len = rspsize;
2688
2689         nvmewqe->retry = 1;
2690         nvmewqe->vport = phba->pport;
2691         nvmewqe->drvrTimeout = (phba->fc_ratov * 3) + LPFC_DRVR_TIMEOUT;
2692         nvmewqe->cmd_flag |= LPFC_IO_NVME_LS;
2693
2694         /* Xmit NVMET response to remote NPORT <did> */
2695         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
2696                         "6039 Xmit NVMET LS response to remote "
2697                         "NPORT x%x iotag:x%x oxid:x%x size:x%x\n",
2698                         ndlp->nlp_DID, nvmewqe->iotag, ctxp->oxid,
2699                         rspsize);
2700         return nvmewqe;
2701
2702 nvme_wqe_free_wqeq_exit:
2703         nvmewqe->context_un.axchg = NULL;
2704         nvmewqe->ndlp = NULL;
2705         nvmewqe->bpl_dmabuf = NULL;
2706         lpfc_sli_release_iocbq(phba, nvmewqe);
2707         return NULL;
2708 }
2709
2710
2711 static struct lpfc_iocbq *
2712 lpfc_nvmet_prep_fcp_wqe(struct lpfc_hba *phba,
2713                         struct lpfc_async_xchg_ctx *ctxp)
2714 {
2715         struct nvmefc_tgt_fcp_req *rsp = &ctxp->hdlrctx.fcp_req;
2716         struct lpfc_nvmet_tgtport *tgtp;
2717         struct sli4_sge *sgl;
2718         struct lpfc_nodelist *ndlp;
2719         struct lpfc_iocbq *nvmewqe;
2720         struct scatterlist *sgel;
2721         union lpfc_wqe128 *wqe;
2722         struct ulp_bde64 *bde;
2723         dma_addr_t physaddr;
2724         int i, cnt, nsegs;
2725         bool use_pbde = false;
2726         int xc = 1;
2727
2728         if (!lpfc_is_link_up(phba)) {
2729                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2730                                 "6107 NVMET prep FCP wqe: link err:"
2731                                 "NPORT x%x oxid x%x ste %d\n",
2732                                 ctxp->sid, ctxp->oxid, ctxp->state);
2733                 return NULL;
2734         }
2735
2736         ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
2737         if (!ndlp ||
2738             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
2739              (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
2740                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2741                                 "6108 NVMET prep FCP wqe: no ndlp: "
2742                                 "NPORT x%x oxid x%x ste %d\n",
2743                                 ctxp->sid, ctxp->oxid, ctxp->state);
2744                 return NULL;
2745         }
2746
2747         if (rsp->sg_cnt > lpfc_tgttemplate.max_sgl_segments) {
2748                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2749                                 "6109 NVMET prep FCP wqe: seg cnt err: "
2750                                 "NPORT x%x oxid x%x ste %d cnt %d\n",
2751                                 ctxp->sid, ctxp->oxid, ctxp->state,
2752                                 phba->cfg_nvme_seg_cnt);
2753                 return NULL;
2754         }
2755         nsegs = rsp->sg_cnt;
2756
2757         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2758         nvmewqe = ctxp->wqeq;
2759         if (nvmewqe == NULL) {
2760                 /* Allocate buffer for  command wqe */
2761                 nvmewqe = ctxp->ctxbuf->iocbq;
2762                 if (nvmewqe == NULL) {
2763                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2764                                         "6110 NVMET prep FCP wqe: No "
2765                                         "WQE: NPORT x%x oxid x%x ste %d\n",
2766                                         ctxp->sid, ctxp->oxid, ctxp->state);
2767                         return NULL;
2768                 }
2769                 ctxp->wqeq = nvmewqe;
2770                 xc = 0; /* create new XRI */
2771                 nvmewqe->sli4_lxritag = NO_XRI;
2772                 nvmewqe->sli4_xritag = NO_XRI;
2773         }
2774
2775         /* Sanity check */
2776         if (((ctxp->state == LPFC_NVME_STE_RCV) &&
2777             (ctxp->entry_cnt == 1)) ||
2778             (ctxp->state == LPFC_NVME_STE_DATA)) {
2779                 wqe = &nvmewqe->wqe;
2780         } else {
2781                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2782                                 "6111 Wrong state NVMET FCP: %d  cnt %d\n",
2783                                 ctxp->state, ctxp->entry_cnt);
2784                 return NULL;
2785         }
2786
2787         sgl  = (struct sli4_sge *)ctxp->ctxbuf->sglq->sgl;
2788         switch (rsp->op) {
2789         case NVMET_FCOP_READDATA:
2790         case NVMET_FCOP_READDATA_RSP:
2791                 /* From the tsend template, initialize words 7 - 11 */
2792                 memcpy(&wqe->words[7],
2793                        &lpfc_tsend_cmd_template.words[7],
2794                        sizeof(uint32_t) * 5);
2795
2796                 /* Words 0 - 2 : The first sg segment */
2797                 sgel = &rsp->sg[0];
2798                 physaddr = sg_dma_address(sgel);
2799                 wqe->fcp_tsend.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2800                 wqe->fcp_tsend.bde.tus.f.bdeSize = sg_dma_len(sgel);
2801                 wqe->fcp_tsend.bde.addrLow = cpu_to_le32(putPaddrLow(physaddr));
2802                 wqe->fcp_tsend.bde.addrHigh =
2803                         cpu_to_le32(putPaddrHigh(physaddr));
2804
2805                 /* Word 3 */
2806                 wqe->fcp_tsend.payload_offset_len = 0;
2807
2808                 /* Word 4 */
2809                 wqe->fcp_tsend.relative_offset = ctxp->offset;
2810
2811                 /* Word 5 */
2812                 wqe->fcp_tsend.reserved = 0;
2813
2814                 /* Word 6 */
2815                 bf_set(wqe_ctxt_tag, &wqe->fcp_tsend.wqe_com,
2816                        phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2817                 bf_set(wqe_xri_tag, &wqe->fcp_tsend.wqe_com,
2818                        nvmewqe->sli4_xritag);
2819
2820                 /* Word 7 - set ar later */
2821
2822                 /* Word 8 */
2823                 wqe->fcp_tsend.wqe_com.abort_tag = nvmewqe->iotag;
2824
2825                 /* Word 9 */
2826                 bf_set(wqe_reqtag, &wqe->fcp_tsend.wqe_com, nvmewqe->iotag);
2827                 bf_set(wqe_rcvoxid, &wqe->fcp_tsend.wqe_com, ctxp->oxid);
2828
2829                 /* Word 10 - set wqes later, in template xc=1 */
2830                 if (!xc)
2831                         bf_set(wqe_xc, &wqe->fcp_tsend.wqe_com, 0);
2832
2833                 /* Word 12 */
2834                 wqe->fcp_tsend.fcp_data_len = rsp->transfer_length;
2835
2836                 /* Setup 2 SKIP SGEs */
2837                 sgl->addr_hi = 0;
2838                 sgl->addr_lo = 0;
2839                 sgl->word2 = 0;
2840                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2841                 sgl->word2 = cpu_to_le32(sgl->word2);
2842                 sgl->sge_len = 0;
2843                 sgl++;
2844                 sgl->addr_hi = 0;
2845                 sgl->addr_lo = 0;
2846                 sgl->word2 = 0;
2847                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2848                 sgl->word2 = cpu_to_le32(sgl->word2);
2849                 sgl->sge_len = 0;
2850                 sgl++;
2851                 if (rsp->op == NVMET_FCOP_READDATA_RSP) {
2852                         atomic_inc(&tgtp->xmt_fcp_read_rsp);
2853
2854                         /* In template ar=1 wqes=0 sup=0 irsp=0 irsplen=0 */
2855
2856                         if (rsp->rsplen == LPFC_NVMET_SUCCESS_LEN) {
2857                                 if (test_bit(NLP_SUPPRESS_RSP, &ndlp->nlp_flag))
2858                                         bf_set(wqe_sup,
2859                                                &wqe->fcp_tsend.wqe_com, 1);
2860                         } else {
2861                                 bf_set(wqe_wqes, &wqe->fcp_tsend.wqe_com, 1);
2862                                 bf_set(wqe_irsp, &wqe->fcp_tsend.wqe_com, 1);
2863                                 bf_set(wqe_irsplen, &wqe->fcp_tsend.wqe_com,
2864                                        ((rsp->rsplen >> 2) - 1));
2865                                 memcpy(&wqe->words[16], rsp->rspaddr,
2866                                        rsp->rsplen);
2867                         }
2868                 } else {
2869                         atomic_inc(&tgtp->xmt_fcp_read);
2870
2871                         /* In template ar=1 wqes=0 sup=0 irsp=0 irsplen=0 */
2872                         bf_set(wqe_ar, &wqe->fcp_tsend.wqe_com, 0);
2873                 }
2874                 break;
2875
2876         case NVMET_FCOP_WRITEDATA:
2877                 /* From the treceive template, initialize words 3 - 11 */
2878                 memcpy(&wqe->words[3],
2879                        &lpfc_treceive_cmd_template.words[3],
2880                        sizeof(uint32_t) * 9);
2881
2882                 /* Words 0 - 2 : First SGE is skipped, set invalid BDE type */
2883                 wqe->fcp_treceive.bde.tus.f.bdeFlags = LPFC_SGE_TYPE_SKIP;
2884                 wqe->fcp_treceive.bde.tus.f.bdeSize = 0;
2885                 wqe->fcp_treceive.bde.addrLow = 0;
2886                 wqe->fcp_treceive.bde.addrHigh = 0;
2887
2888                 /* Word 4 */
2889                 wqe->fcp_treceive.relative_offset = ctxp->offset;
2890
2891                 /* Word 6 */
2892                 bf_set(wqe_ctxt_tag, &wqe->fcp_treceive.wqe_com,
2893                        phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2894                 bf_set(wqe_xri_tag, &wqe->fcp_treceive.wqe_com,
2895                        nvmewqe->sli4_xritag);
2896
2897                 /* Word 7 */
2898
2899                 /* Word 8 */
2900                 wqe->fcp_treceive.wqe_com.abort_tag = nvmewqe->iotag;
2901
2902                 /* Word 9 */
2903                 bf_set(wqe_reqtag, &wqe->fcp_treceive.wqe_com, nvmewqe->iotag);
2904                 bf_set(wqe_rcvoxid, &wqe->fcp_treceive.wqe_com, ctxp->oxid);
2905
2906                 /* Word 10 - in template xc=1 */
2907                 if (!xc)
2908                         bf_set(wqe_xc, &wqe->fcp_treceive.wqe_com, 0);
2909
2910                 /* Word 11 - check for pbde */
2911                 if (nsegs == 1 && phba->cfg_enable_pbde) {
2912                         use_pbde = true;
2913                         /* Word 11 - PBDE bit already preset by template */
2914                 } else {
2915                         /* Overwrite default template setting */
2916                         bf_set(wqe_pbde, &wqe->fcp_treceive.wqe_com, 0);
2917                 }
2918
2919                 /* Word 12 */
2920                 wqe->fcp_tsend.fcp_data_len = rsp->transfer_length;
2921
2922                 /* Setup 2 SKIP SGEs */
2923                 sgl->addr_hi = 0;
2924                 sgl->addr_lo = 0;
2925                 sgl->word2 = 0;
2926                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2927                 sgl->word2 = cpu_to_le32(sgl->word2);
2928                 sgl->sge_len = 0;
2929                 sgl++;
2930                 sgl->addr_hi = 0;
2931                 sgl->addr_lo = 0;
2932                 sgl->word2 = 0;
2933                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2934                 sgl->word2 = cpu_to_le32(sgl->word2);
2935                 sgl->sge_len = 0;
2936                 sgl++;
2937                 atomic_inc(&tgtp->xmt_fcp_write);
2938                 break;
2939
2940         case NVMET_FCOP_RSP:
2941                 /* From the treceive template, initialize words 4 - 11 */
2942                 memcpy(&wqe->words[4],
2943                        &lpfc_trsp_cmd_template.words[4],
2944                        sizeof(uint32_t) * 8);
2945
2946                 /* Words 0 - 2 */
2947                 physaddr = rsp->rspdma;
2948                 wqe->fcp_trsp.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2949                 wqe->fcp_trsp.bde.tus.f.bdeSize = rsp->rsplen;
2950                 wqe->fcp_trsp.bde.addrLow =
2951                         cpu_to_le32(putPaddrLow(physaddr));
2952                 wqe->fcp_trsp.bde.addrHigh =
2953                         cpu_to_le32(putPaddrHigh(physaddr));
2954
2955                 /* Word 3 */
2956                 wqe->fcp_trsp.response_len = rsp->rsplen;
2957
2958                 /* Word 6 */
2959                 bf_set(wqe_ctxt_tag, &wqe->fcp_trsp.wqe_com,
2960                        phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2961                 bf_set(wqe_xri_tag, &wqe->fcp_trsp.wqe_com,
2962                        nvmewqe->sli4_xritag);
2963
2964                 /* Word 7 */
2965
2966                 /* Word 8 */
2967                 wqe->fcp_trsp.wqe_com.abort_tag = nvmewqe->iotag;
2968
2969                 /* Word 9 */
2970                 bf_set(wqe_reqtag, &wqe->fcp_trsp.wqe_com, nvmewqe->iotag);
2971                 bf_set(wqe_rcvoxid, &wqe->fcp_trsp.wqe_com, ctxp->oxid);
2972
2973                 /* Word 10 */
2974                 if (xc)
2975                         bf_set(wqe_xc, &wqe->fcp_trsp.wqe_com, 1);
2976
2977                 /* Word 11 */
2978                 /* In template wqes=0 irsp=0 irsplen=0 - good response */
2979                 if (rsp->rsplen != LPFC_NVMET_SUCCESS_LEN) {
2980                         /* Bad response - embed it */
2981                         bf_set(wqe_wqes, &wqe->fcp_trsp.wqe_com, 1);
2982                         bf_set(wqe_irsp, &wqe->fcp_trsp.wqe_com, 1);
2983                         bf_set(wqe_irsplen, &wqe->fcp_trsp.wqe_com,
2984                                ((rsp->rsplen >> 2) - 1));
2985                         memcpy(&wqe->words[16], rsp->rspaddr, rsp->rsplen);
2986                 }
2987
2988                 /* Word 12 */
2989                 wqe->fcp_trsp.rsvd_12_15[0] = 0;
2990
2991                 /* Use rspbuf, NOT sg list */
2992                 nsegs = 0;
2993                 sgl->word2 = 0;
2994                 atomic_inc(&tgtp->xmt_fcp_rsp);
2995                 break;
2996
2997         default:
2998                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
2999                                 "6064 Unknown Rsp Op %d\n",
3000                                 rsp->op);
3001                 return NULL;
3002         }
3003
3004         nvmewqe->retry = 1;
3005         nvmewqe->vport = phba->pport;
3006         nvmewqe->drvrTimeout = (phba->fc_ratov * 3) + LPFC_DRVR_TIMEOUT;
3007         nvmewqe->ndlp = ndlp;
3008
3009         for_each_sg(rsp->sg, sgel, nsegs, i) {
3010                 physaddr = sg_dma_address(sgel);
3011                 cnt = sg_dma_len(sgel);
3012                 sgl->addr_hi = putPaddrHigh(physaddr);
3013                 sgl->addr_lo = putPaddrLow(physaddr);
3014                 sgl->word2 = 0;
3015                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
3016                 bf_set(lpfc_sli4_sge_offset, sgl, ctxp->offset);
3017                 if ((i+1) == rsp->sg_cnt)
3018                         bf_set(lpfc_sli4_sge_last, sgl, 1);
3019                 sgl->word2 = cpu_to_le32(sgl->word2);
3020                 sgl->sge_len = cpu_to_le32(cnt);
3021                 sgl++;
3022                 ctxp->offset += cnt;
3023         }
3024
3025         bde = (struct ulp_bde64 *)&wqe->words[13];
3026         if (use_pbde) {
3027                 /* decrement sgl ptr backwards once to first data sge */
3028                 sgl--;
3029
3030                 /* Words 13-15 (PBDE) */
3031                 bde->addrLow = sgl->addr_lo;
3032                 bde->addrHigh = sgl->addr_hi;
3033                 bde->tus.f.bdeSize = le32_to_cpu(sgl->sge_len);
3034                 bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
3035                 bde->tus.w = cpu_to_le32(bde->tus.w);
3036         } else {
3037                 memset(bde, 0, sizeof(struct ulp_bde64));
3038         }
3039         ctxp->state = LPFC_NVME_STE_DATA;
3040         ctxp->entry_cnt++;
3041         return nvmewqe;
3042 }
3043
3044 /**
3045  * lpfc_nvmet_sol_fcp_abort_cmp - Completion handler for ABTS
3046  * @phba: Pointer to HBA context object.
3047  * @cmdwqe: Pointer to driver command WQE object.
3048  * @rspwqe: Pointer to driver response WQE object.
3049  *
3050  * The function is called from SLI ring event handler with no
3051  * lock held. This function is the completion handler for NVME ABTS for FCP cmds
3052  * The function frees memory resources used for the NVME commands.
3053  **/
3054 static void
3055 lpfc_nvmet_sol_fcp_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3056                              struct lpfc_iocbq *rspwqe)
3057 {
3058         struct lpfc_async_xchg_ctx *ctxp;
3059         struct lpfc_nvmet_tgtport *tgtp;
3060         uint32_t result;
3061         unsigned long flags;
3062         bool released = false;
3063         struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
3064
3065         ctxp = cmdwqe->context_un.axchg;
3066         result = wcqe->parameter;
3067
3068         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3069         if (ctxp->flag & LPFC_NVME_ABORT_OP)
3070                 atomic_inc(&tgtp->xmt_fcp_abort_cmpl);
3071
3072         spin_lock_irqsave(&ctxp->ctxlock, flags);
3073         ctxp->state = LPFC_NVME_STE_DONE;
3074
3075         /* Check if we already received a free context call
3076          * and we have completed processing an abort situation.
3077          */
3078         if ((ctxp->flag & LPFC_NVME_CTX_RLS) &&
3079             !(ctxp->flag & LPFC_NVME_XBUSY)) {
3080                 spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3081                 list_del_init(&ctxp->list);
3082                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3083                 released = true;
3084         }
3085         ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3086         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3087         atomic_inc(&tgtp->xmt_abort_rsp);
3088
3089         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3090                         "6165 ABORT cmpl: oxid x%x flg x%x (%d) "
3091                         "WCQE: %08x %08x %08x %08x\n",
3092                         ctxp->oxid, ctxp->flag, released,
3093                         wcqe->word0, wcqe->total_data_placed,
3094                         result, wcqe->word3);
3095
3096         cmdwqe->rsp_dmabuf = NULL;
3097         cmdwqe->bpl_dmabuf = NULL;
3098         /*
3099          * if transport has released ctx, then can reuse it. Otherwise,
3100          * will be recycled by transport release call.
3101          */
3102         if (released)
3103                 lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
3104
3105         /* This is the iocbq for the abort, not the command */
3106         lpfc_sli_release_iocbq(phba, cmdwqe);
3107
3108         /* Since iaab/iaar are NOT set, there is no work left.
3109          * For LPFC_NVME_XBUSY, lpfc_sli4_nvmet_xri_aborted
3110          * should have been called already.
3111          */
3112 }
3113
3114 /**
3115  * lpfc_nvmet_unsol_fcp_abort_cmp - Completion handler for ABTS
3116  * @phba: Pointer to HBA context object.
3117  * @cmdwqe: Pointer to driver command WQE object.
3118  * @rspwqe: Pointer to driver response WQE object.
3119  *
3120  * The function is called from SLI ring event handler with no
3121  * lock held. This function is the completion handler for NVME ABTS for FCP cmds
3122  * The function frees memory resources used for the NVME commands.
3123  **/
3124 static void
3125 lpfc_nvmet_unsol_fcp_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3126                                struct lpfc_iocbq *rspwqe)
3127 {
3128         struct lpfc_async_xchg_ctx *ctxp;
3129         struct lpfc_nvmet_tgtport *tgtp;
3130         unsigned long flags;
3131         uint32_t result;
3132         bool released = false;
3133         struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
3134
3135         ctxp = cmdwqe->context_un.axchg;
3136         result = wcqe->parameter;
3137
3138         if (!ctxp) {
3139                 /* if context is clear, related io alrady complete */
3140                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3141                                 "6070 ABTS cmpl: WCQE: %08x %08x %08x %08x\n",
3142                                 wcqe->word0, wcqe->total_data_placed,
3143                                 result, wcqe->word3);
3144                 return;
3145         }
3146
3147         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3148         spin_lock_irqsave(&ctxp->ctxlock, flags);
3149         if (ctxp->flag & LPFC_NVME_ABORT_OP)
3150                 atomic_inc(&tgtp->xmt_fcp_abort_cmpl);
3151
3152         /* Sanity check */
3153         if (ctxp->state != LPFC_NVME_STE_ABORT) {
3154                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3155                                 "6112 ABTS Wrong state:%d oxid x%x\n",
3156                                 ctxp->state, ctxp->oxid);
3157         }
3158
3159         /* Check if we already received a free context call
3160          * and we have completed processing an abort situation.
3161          */
3162         ctxp->state = LPFC_NVME_STE_DONE;
3163         if ((ctxp->flag & LPFC_NVME_CTX_RLS) &&
3164             !(ctxp->flag & LPFC_NVME_XBUSY)) {
3165                 spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3166                 list_del_init(&ctxp->list);
3167                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3168                 released = true;
3169         }
3170         ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3171         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3172         atomic_inc(&tgtp->xmt_abort_rsp);
3173
3174         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3175                         "6316 ABTS cmpl oxid x%x flg x%x (%x) "
3176                         "WCQE: %08x %08x %08x %08x\n",
3177                         ctxp->oxid, ctxp->flag, released,
3178                         wcqe->word0, wcqe->total_data_placed,
3179                         result, wcqe->word3);
3180
3181         cmdwqe->rsp_dmabuf = NULL;
3182         cmdwqe->bpl_dmabuf = NULL;
3183         /*
3184          * if transport has released ctx, then can reuse it. Otherwise,
3185          * will be recycled by transport release call.
3186          */
3187         if (released)
3188                 lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
3189
3190         /* Since iaab/iaar are NOT set, there is no work left.
3191          * For LPFC_NVME_XBUSY, lpfc_sli4_nvmet_xri_aborted
3192          * should have been called already.
3193          */
3194 }
3195
3196 /**
3197  * lpfc_nvmet_xmt_ls_abort_cmp - Completion handler for ABTS
3198  * @phba: Pointer to HBA context object.
3199  * @cmdwqe: Pointer to driver command WQE object.
3200  * @rspwqe: Pointer to driver response WQE object.
3201  *
3202  * The function is called from SLI ring event handler with no
3203  * lock held. This function is the completion handler for NVME ABTS for LS cmds
3204  * The function frees memory resources used for the NVME commands.
3205  **/
3206 static void
3207 lpfc_nvmet_xmt_ls_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3208                             struct lpfc_iocbq *rspwqe)
3209 {
3210         struct lpfc_async_xchg_ctx *ctxp;
3211         struct lpfc_nvmet_tgtport *tgtp;
3212         uint32_t result;
3213         struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
3214
3215         ctxp = cmdwqe->context_un.axchg;
3216         result = wcqe->parameter;
3217
3218         if (phba->nvmet_support) {
3219                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3220                 atomic_inc(&tgtp->xmt_ls_abort_cmpl);
3221         }
3222
3223         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3224                         "6083 Abort cmpl: ctx x%px WCQE:%08x %08x %08x %08x\n",
3225                         ctxp, wcqe->word0, wcqe->total_data_placed,
3226                         result, wcqe->word3);
3227
3228         if (!ctxp) {
3229                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3230                                 "6415 NVMET LS Abort No ctx: WCQE: "
3231                                  "%08x %08x %08x %08x\n",
3232                                 wcqe->word0, wcqe->total_data_placed,
3233                                 result, wcqe->word3);
3234
3235                 lpfc_sli_release_iocbq(phba, cmdwqe);
3236                 return;
3237         }
3238
3239         if (ctxp->state != LPFC_NVME_STE_LS_ABORT) {
3240                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3241                                 "6416 NVMET LS abort cmpl state mismatch: "
3242                                 "oxid x%x: %d %d\n",
3243                                 ctxp->oxid, ctxp->state, ctxp->entry_cnt);
3244         }
3245
3246         cmdwqe->rsp_dmabuf = NULL;
3247         cmdwqe->bpl_dmabuf = NULL;
3248         lpfc_sli_release_iocbq(phba, cmdwqe);
3249         kfree(ctxp);
3250 }
3251
3252 static int
3253 lpfc_nvmet_unsol_issue_abort(struct lpfc_hba *phba,
3254                              struct lpfc_async_xchg_ctx *ctxp,
3255                              uint32_t sid, uint16_t xri)
3256 {
3257         struct lpfc_nvmet_tgtport *tgtp = NULL;
3258         struct lpfc_iocbq *abts_wqeq;
3259         union lpfc_wqe128 *wqe_abts;
3260         struct lpfc_nodelist *ndlp;
3261
3262         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3263                         "6067 ABTS: sid %x xri x%x/x%x\n",
3264                         sid, xri, ctxp->wqeq->sli4_xritag);
3265
3266         if (phba->nvmet_support && phba->targetport)
3267                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3268
3269         ndlp = lpfc_findnode_did(phba->pport, sid);
3270         if (!ndlp ||
3271             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
3272             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
3273                 if (tgtp)
3274                         atomic_inc(&tgtp->xmt_abort_rsp_error);
3275                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3276                                 "6134 Drop ABTS - wrong NDLP state x%x.\n",
3277                                 (ndlp) ? ndlp->nlp_state : NLP_STE_MAX_STATE);
3278
3279                 /* No failure to an ABTS request. */
3280                 return 0;
3281         }
3282
3283         abts_wqeq = ctxp->wqeq;
3284         wqe_abts = &abts_wqeq->wqe;
3285
3286         /*
3287          * Since we zero the whole WQE, we need to ensure we set the WQE fields
3288          * that were initialized in lpfc_sli4_nvmet_alloc.
3289          */
3290         memset(wqe_abts, 0, sizeof(union lpfc_wqe));
3291
3292         /* Word 5 */
3293         bf_set(wqe_dfctl, &wqe_abts->xmit_sequence.wge_ctl, 0);
3294         bf_set(wqe_ls, &wqe_abts->xmit_sequence.wge_ctl, 1);
3295         bf_set(wqe_la, &wqe_abts->xmit_sequence.wge_ctl, 0);
3296         bf_set(wqe_rctl, &wqe_abts->xmit_sequence.wge_ctl, FC_RCTL_BA_ABTS);
3297         bf_set(wqe_type, &wqe_abts->xmit_sequence.wge_ctl, FC_TYPE_BLS);
3298
3299         /* Word 6 */
3300         bf_set(wqe_ctxt_tag, &wqe_abts->xmit_sequence.wqe_com,
3301                phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
3302         bf_set(wqe_xri_tag, &wqe_abts->xmit_sequence.wqe_com,
3303                abts_wqeq->sli4_xritag);
3304
3305         /* Word 7 */
3306         bf_set(wqe_cmnd, &wqe_abts->xmit_sequence.wqe_com,
3307                CMD_XMIT_SEQUENCE64_WQE);
3308         bf_set(wqe_ct, &wqe_abts->xmit_sequence.wqe_com, SLI4_CT_RPI);
3309         bf_set(wqe_class, &wqe_abts->xmit_sequence.wqe_com, CLASS3);
3310         bf_set(wqe_pu, &wqe_abts->xmit_sequence.wqe_com, 0);
3311
3312         /* Word 8 */
3313         wqe_abts->xmit_sequence.wqe_com.abort_tag = abts_wqeq->iotag;
3314
3315         /* Word 9 */
3316         bf_set(wqe_reqtag, &wqe_abts->xmit_sequence.wqe_com, abts_wqeq->iotag);
3317         /* Needs to be set by caller */
3318         bf_set(wqe_rcvoxid, &wqe_abts->xmit_sequence.wqe_com, xri);
3319
3320         /* Word 10 */
3321         bf_set(wqe_iod, &wqe_abts->xmit_sequence.wqe_com, LPFC_WQE_IOD_WRITE);
3322         bf_set(wqe_lenloc, &wqe_abts->xmit_sequence.wqe_com,
3323                LPFC_WQE_LENLOC_WORD12);
3324         bf_set(wqe_ebde_cnt, &wqe_abts->xmit_sequence.wqe_com, 0);
3325         bf_set(wqe_qosd, &wqe_abts->xmit_sequence.wqe_com, 0);
3326
3327         /* Word 11 */
3328         bf_set(wqe_cqid, &wqe_abts->xmit_sequence.wqe_com,
3329                LPFC_WQE_CQ_ID_DEFAULT);
3330         bf_set(wqe_cmd_type, &wqe_abts->xmit_sequence.wqe_com,
3331                OTHER_COMMAND);
3332
3333         abts_wqeq->vport = phba->pport;
3334         abts_wqeq->ndlp = ndlp;
3335         abts_wqeq->context_un.axchg = ctxp;
3336         abts_wqeq->bpl_dmabuf = NULL;
3337         abts_wqeq->num_bdes = 0;
3338         /* hba_wqidx should already be setup from command we are aborting */
3339         abts_wqeq->iocb.ulpCommand = CMD_XMIT_SEQUENCE64_CR;
3340         abts_wqeq->iocb.ulpLe = 1;
3341
3342         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3343                         "6069 Issue ABTS to xri x%x reqtag x%x\n",
3344                         xri, abts_wqeq->iotag);
3345         return 1;
3346 }
3347
3348 static int
3349 lpfc_nvmet_sol_fcp_issue_abort(struct lpfc_hba *phba,
3350                                struct lpfc_async_xchg_ctx *ctxp,
3351                                uint32_t sid, uint16_t xri)
3352 {
3353         struct lpfc_nvmet_tgtport *tgtp;
3354         struct lpfc_iocbq *abts_wqeq;
3355         struct lpfc_nodelist *ndlp;
3356         unsigned long flags;
3357         bool ia;
3358         int rc;
3359
3360         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3361         if (!ctxp->wqeq) {
3362                 ctxp->wqeq = ctxp->ctxbuf->iocbq;
3363                 ctxp->wqeq->hba_wqidx = 0;
3364         }
3365
3366         ndlp = lpfc_findnode_did(phba->pport, sid);
3367         if (!ndlp ||
3368             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
3369             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
3370                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3371                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3372                                 "6160 Drop ABORT - wrong NDLP state x%x.\n",
3373                                 (ndlp) ? ndlp->nlp_state : NLP_STE_MAX_STATE);
3374
3375                 /* No failure to an ABTS request. */
3376                 spin_lock_irqsave(&ctxp->ctxlock, flags);
3377                 ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3378                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3379                 return 0;
3380         }
3381
3382         /* Issue ABTS for this WQE based on iotag */
3383         ctxp->abort_wqeq = lpfc_sli_get_iocbq(phba);
3384         spin_lock_irqsave(&ctxp->ctxlock, flags);
3385         if (!ctxp->abort_wqeq) {
3386                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3387                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3388                                 "6161 ABORT failed: No wqeqs: "
3389                                 "xri: x%x\n", ctxp->oxid);
3390                 /* No failure to an ABTS request. */
3391                 ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3392                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3393                 return 0;
3394         }
3395         abts_wqeq = ctxp->abort_wqeq;
3396         ctxp->state = LPFC_NVME_STE_ABORT;
3397         ia = (ctxp->flag & LPFC_NVME_ABTS_RCV) ? true : false;
3398         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3399
3400         /* Announce entry to new IO submit field. */
3401         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3402                         "6162 ABORT Request to rport DID x%06x "
3403                         "for xri x%x x%x\n",
3404                         ctxp->sid, ctxp->oxid, ctxp->wqeq->sli4_xritag);
3405
3406         /* If the hba is getting reset, this flag is set.  It is
3407          * cleared when the reset is complete and rings reestablished.
3408          */
3409         /* driver queued commands are in process of being flushed */
3410         if (test_bit(HBA_IOQ_FLUSH, &phba->hba_flag)) {
3411                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3412                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3413                                 "6163 Driver in reset cleanup - flushing "
3414                                 "NVME Req now. hba_flag x%lx oxid x%x\n",
3415                                 phba->hba_flag, ctxp->oxid);
3416                 lpfc_sli_release_iocbq(phba, abts_wqeq);
3417                 spin_lock_irqsave(&ctxp->ctxlock, flags);
3418                 ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3419                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3420                 return 0;
3421         }
3422
3423         spin_lock_irqsave(&phba->hbalock, flags);
3424         /* Outstanding abort is in progress */
3425         if (abts_wqeq->cmd_flag & LPFC_DRIVER_ABORTED) {
3426                 spin_unlock_irqrestore(&phba->hbalock, flags);
3427                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3428                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3429                                 "6164 Outstanding NVME I/O Abort Request "
3430                                 "still pending on oxid x%x\n",
3431                                 ctxp->oxid);
3432                 lpfc_sli_release_iocbq(phba, abts_wqeq);
3433                 spin_lock_irqsave(&ctxp->ctxlock, flags);
3434                 ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3435                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3436                 return 0;
3437         }
3438
3439         /* Ready - mark outstanding as aborted by driver. */
3440         abts_wqeq->cmd_flag |= LPFC_DRIVER_ABORTED;
3441
3442         lpfc_sli_prep_abort_xri(phba, abts_wqeq, ctxp->wqeq->sli4_xritag,
3443                                 abts_wqeq->iotag, CLASS3,
3444                                 LPFC_WQE_CQ_ID_DEFAULT, ia, true);
3445
3446         /* ABTS WQE must go to the same WQ as the WQE to be aborted */
3447         abts_wqeq->hba_wqidx = ctxp->wqeq->hba_wqidx;
3448         abts_wqeq->cmd_cmpl = lpfc_nvmet_sol_fcp_abort_cmp;
3449         abts_wqeq->cmd_flag |= LPFC_IO_NVME;
3450         abts_wqeq->context_un.axchg = ctxp;
3451         abts_wqeq->vport = phba->pport;
3452         if (!ctxp->hdwq)
3453                 ctxp->hdwq = &phba->sli4_hba.hdwq[abts_wqeq->hba_wqidx];
3454
3455         rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, abts_wqeq);
3456         spin_unlock_irqrestore(&phba->hbalock, flags);
3457         if (rc == WQE_SUCCESS) {
3458                 atomic_inc(&tgtp->xmt_abort_sol);
3459                 return 0;
3460         }
3461
3462         atomic_inc(&tgtp->xmt_abort_rsp_error);
3463         spin_lock_irqsave(&ctxp->ctxlock, flags);
3464         ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3465         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3466         lpfc_sli_release_iocbq(phba, abts_wqeq);
3467         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3468                         "6166 Failed ABORT issue_wqe with status x%x "
3469                         "for oxid x%x.\n",
3470                         rc, ctxp->oxid);
3471         return 1;
3472 }
3473
3474 static int
3475 lpfc_nvmet_unsol_fcp_issue_abort(struct lpfc_hba *phba,
3476                                  struct lpfc_async_xchg_ctx *ctxp,
3477                                  uint32_t sid, uint16_t xri)
3478 {
3479         struct lpfc_nvmet_tgtport *tgtp;
3480         struct lpfc_iocbq *abts_wqeq;
3481         unsigned long flags;
3482         bool released = false;
3483         int rc;
3484
3485         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3486         if (!ctxp->wqeq) {
3487                 ctxp->wqeq = ctxp->ctxbuf->iocbq;
3488                 ctxp->wqeq->hba_wqidx = 0;
3489         }
3490
3491         if (ctxp->state == LPFC_NVME_STE_FREE) {
3492                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3493                                 "6417 NVMET ABORT ctx freed %d %d oxid x%x\n",
3494                                 ctxp->state, ctxp->entry_cnt, ctxp->oxid);
3495                 rc = WQE_BUSY;
3496                 goto aerr;
3497         }
3498         ctxp->state = LPFC_NVME_STE_ABORT;
3499         ctxp->entry_cnt++;
3500         rc = lpfc_nvmet_unsol_issue_abort(phba, ctxp, sid, xri);
3501         if (rc == 0)
3502                 goto aerr;
3503
3504         spin_lock_irqsave(&phba->hbalock, flags);
3505         abts_wqeq = ctxp->wqeq;
3506         abts_wqeq->cmd_cmpl = lpfc_nvmet_unsol_fcp_abort_cmp;
3507         abts_wqeq->cmd_flag |= LPFC_IO_NVMET;
3508         if (!ctxp->hdwq)
3509                 ctxp->hdwq = &phba->sli4_hba.hdwq[abts_wqeq->hba_wqidx];
3510
3511         rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, abts_wqeq);
3512         spin_unlock_irqrestore(&phba->hbalock, flags);
3513         if (rc == WQE_SUCCESS) {
3514                 return 0;
3515         }
3516
3517 aerr:
3518         spin_lock_irqsave(&ctxp->ctxlock, flags);
3519         if (ctxp->flag & LPFC_NVME_CTX_RLS) {
3520                 spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3521                 list_del_init(&ctxp->list);
3522                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3523                 released = true;
3524         }
3525         ctxp->flag &= ~(LPFC_NVME_ABORT_OP | LPFC_NVME_CTX_RLS);
3526         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3527
3528         atomic_inc(&tgtp->xmt_abort_rsp_error);
3529         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3530                         "6135 Failed to Issue ABTS for oxid x%x. Status x%x "
3531                         "(%x)\n",
3532                         ctxp->oxid, rc, released);
3533         if (released)
3534                 lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
3535         return 1;
3536 }
3537
3538 /**
3539  * lpfc_nvme_unsol_ls_issue_abort - issue ABTS on an exchange received
3540  *        via async frame receive where the frame is not handled.
3541  * @phba: pointer to adapter structure
3542  * @ctxp: pointer to the asynchronously received received sequence
3543  * @sid: address of the remote port to send the ABTS to
3544  * @xri: oxid value to for the ABTS (other side's exchange id).
3545  **/
3546 int
3547 lpfc_nvme_unsol_ls_issue_abort(struct lpfc_hba *phba,
3548                                 struct lpfc_async_xchg_ctx *ctxp,
3549                                 uint32_t sid, uint16_t xri)
3550 {
3551         struct lpfc_nvmet_tgtport *tgtp = NULL;
3552         struct lpfc_iocbq *abts_wqeq;
3553         unsigned long flags;
3554         int rc;
3555
3556         if ((ctxp->state == LPFC_NVME_STE_LS_RCV && ctxp->entry_cnt == 1) ||
3557             (ctxp->state == LPFC_NVME_STE_LS_RSP && ctxp->entry_cnt == 2)) {
3558                 ctxp->state = LPFC_NVME_STE_LS_ABORT;
3559                 ctxp->entry_cnt++;
3560         } else {
3561                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3562                                 "6418 NVMET LS abort state mismatch "
3563                                 "IO x%x: %d %d\n",
3564                                 ctxp->oxid, ctxp->state, ctxp->entry_cnt);
3565                 ctxp->state = LPFC_NVME_STE_LS_ABORT;
3566         }
3567
3568         if (phba->nvmet_support && phba->targetport)
3569                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3570
3571         if (!ctxp->wqeq) {
3572                 /* Issue ABTS for this WQE based on iotag */
3573                 ctxp->wqeq = lpfc_sli_get_iocbq(phba);
3574                 if (!ctxp->wqeq) {
3575                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3576                                         "6068 Abort failed: No wqeqs: "
3577                                         "xri: x%x\n", xri);
3578                         /* No failure to an ABTS request. */
3579                         kfree(ctxp);
3580                         return 0;
3581                 }
3582         }
3583         abts_wqeq = ctxp->wqeq;
3584
3585         if (lpfc_nvmet_unsol_issue_abort(phba, ctxp, sid, xri) == 0) {
3586                 rc = WQE_BUSY;
3587                 goto out;
3588         }
3589
3590         spin_lock_irqsave(&phba->hbalock, flags);
3591         abts_wqeq->cmd_cmpl = lpfc_nvmet_xmt_ls_abort_cmp;
3592         abts_wqeq->cmd_flag |=  LPFC_IO_NVME_LS;
3593         rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, abts_wqeq);
3594         spin_unlock_irqrestore(&phba->hbalock, flags);
3595         if (rc == WQE_SUCCESS) {
3596                 if (tgtp)
3597                         atomic_inc(&tgtp->xmt_abort_unsol);
3598                 return 0;
3599         }
3600 out:
3601         if (tgtp)
3602                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3603         abts_wqeq->rsp_dmabuf = NULL;
3604         abts_wqeq->bpl_dmabuf = NULL;
3605         lpfc_sli_release_iocbq(phba, abts_wqeq);
3606         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3607                         "6056 Failed to Issue ABTS. Status x%x\n", rc);
3608         return 1;
3609 }
3610
3611 /**
3612  * lpfc_nvmet_invalidate_host
3613  *
3614  * @phba: pointer to the driver instance bound to an adapter port.
3615  * @ndlp: pointer to an lpfc_nodelist type
3616  *
3617  * This routine upcalls the nvmet transport to invalidate an NVME
3618  * host to which this target instance had active connections.
3619  */
3620 void
3621 lpfc_nvmet_invalidate_host(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
3622 {
3623         u32 ndlp_has_hh;
3624         struct lpfc_nvmet_tgtport *tgtp;
3625
3626         lpfc_printf_log(phba, KERN_INFO,
3627                         LOG_NVME | LOG_NVME_ABTS | LOG_NVME_DISC,
3628                         "6203 Invalidating hosthandle x%px\n",
3629                         ndlp);
3630
3631         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3632         atomic_set(&tgtp->state, LPFC_NVMET_INV_HOST_ACTIVE);
3633
3634         spin_lock_irq(&ndlp->lock);
3635         ndlp_has_hh = ndlp->fc4_xpt_flags & NLP_XPT_HAS_HH;
3636         spin_unlock_irq(&ndlp->lock);
3637
3638         /* Do not invalidate any nodes that do not have a hosthandle.
3639          * The host_release callbk will cause a node reference
3640          * count imbalance and a crash.
3641          */
3642         if (!ndlp_has_hh) {
3643                 lpfc_printf_log(phba, KERN_INFO,
3644                                 LOG_NVME | LOG_NVME_ABTS | LOG_NVME_DISC,
3645                                 "6204 Skip invalidate on node x%px DID x%x\n",
3646                                 ndlp, ndlp->nlp_DID);
3647                 return;
3648         }
3649
3650 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
3651         /* Need to get the nvmet_fc_target_port pointer here.*/
3652         nvmet_fc_invalidate_host(phba->targetport, ndlp);
3653 #endif
3654 }