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) 2017-2022 Broadcom. All Rights Reserved. The term *
   5  * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.     *
   6  * Copyright (C) 2004-2016 Emulex.  All rights reserved.           *
   7  * EMULEX and SLI are trademarks of Emulex.                        *
   8  * www.broadcom.com                                                *
   9  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
  10  *                                                                 *
  11  * This program is free software; you can redistribute it and/or   *
  12  * modify it under the terms of version 2 of the GNU General       *
  13  * Public License as published by the Free Software Foundation.    *
  14  * This program is distributed in the hope that it will be useful. *
  15  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  16  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  17  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  18  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  19  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  20  * more details, a copy of which can be found in the file COPYING  *
  21  * included with this package.                                     *
  22  ********************************************************************/
  23 #include <linux/pci.h>
  24 #include <linux/slab.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/delay.h>
  27 #include <asm/unaligned.h>
  28 #include <linux/crc-t10dif.h>
  29 #include <net/checksum.h>
  30
  31 #include <scsi/scsi.h>
  32 #include <scsi/scsi_device.h>
  33 #include <scsi/scsi_eh.h>
  34 #include <scsi/scsi_host.h>
  35 #include <scsi/scsi_tcq.h>
  36 #include <scsi/scsi_transport_fc.h>
  37 #include <scsi/fc/fc_fs.h>
  38
  39 #include "lpfc_version.h"
  40 #include "lpfc_hw4.h"
  41 #include "lpfc_hw.h"
  42 #include "lpfc_sli.h"
  43 #include "lpfc_sli4.h"
  44 #include "lpfc_nl.h"
  45 #include "lpfc_disc.h"
  46 #include "lpfc.h"
  47 #include "lpfc_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) & LPFC_IOCB_STATUS_MASK;
 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) & LPFC_IOCB_STATUS_MASK;
 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 (phba->pport->load_flag & FC_UNLOADING)
 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 (axchg->phba->pport->load_flag & FC_UNLOADING)
 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 (phba->pport->load_flag & FC_UNLOADING) {
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 (phba->pport->load_flag & FC_UNLOADING)
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 (phba->pport->load_flag & FC_UNLOADING)
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 (phba->pport->load_flag & FC_UNLOADING)
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 void
1367 lpfc_nvmet_host_release(void *hosthandle)
1368 {
1369         struct lpfc_nodelist *ndlp = hosthandle;
1370         struct lpfc_hba *phba = ndlp->phba;
1371         struct lpfc_nvmet_tgtport *tgtp;
1372
1373         if (!phba->targetport || !phba->targetport->private)
1374                 return;
1375
1376         lpfc_printf_log(phba, KERN_ERR, LOG_NVME,
1377                         "6202 NVMET XPT releasing hosthandle x%px "
1378                         "DID x%x xflags x%x refcnt %d\n",
1379                         hosthandle, ndlp->nlp_DID, ndlp->fc4_xpt_flags,
1380                         kref_read(&ndlp->kref));
1381         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
1382         spin_lock_irq(&ndlp->lock);
1383         ndlp->fc4_xpt_flags &= ~NLP_XPT_HAS_HH;
1384         spin_unlock_irq(&ndlp->lock);
1385         lpfc_nlp_put(ndlp);
1386         atomic_set(&tgtp->state, 0);
1387 }
1388
1389 static void
1390 lpfc_nvmet_discovery_event(struct nvmet_fc_target_port *tgtport)
1391 {
1392         struct lpfc_nvmet_tgtport *tgtp;
1393         struct lpfc_hba *phba;
1394         uint32_t rc;
1395
1396         tgtp = tgtport->private;
1397         phba = tgtp->phba;
1398
1399         rc = lpfc_issue_els_rscn(phba->pport, 0);
1400         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1401                         "6420 NVMET subsystem change: Notification %s\n",
1402                         (rc) ? "Failed" : "Sent");
1403 }
1404
1405 static struct nvmet_fc_target_template lpfc_tgttemplate = {
1406         .targetport_delete = lpfc_nvmet_targetport_delete,
1407         .xmt_ls_rsp     = lpfc_nvmet_xmt_ls_rsp,
1408         .fcp_op         = lpfc_nvmet_xmt_fcp_op,
1409         .fcp_abort      = lpfc_nvmet_xmt_fcp_abort,
1410         .fcp_req_release = lpfc_nvmet_xmt_fcp_release,
1411         .defer_rcv      = lpfc_nvmet_defer_rcv,
1412         .discovery_event = lpfc_nvmet_discovery_event,
1413         .ls_req         = lpfc_nvmet_ls_req,
1414         .ls_abort       = lpfc_nvmet_ls_abort,
1415         .host_release   = lpfc_nvmet_host_release,
1416
1417         .max_hw_queues  = 1,
1418         .max_sgl_segments = LPFC_NVMET_DEFAULT_SEGS,
1419         .max_dif_sgl_segments = LPFC_NVMET_DEFAULT_SEGS,
1420         .dma_boundary = 0xFFFFFFFF,
1421
1422         /* optional features */
1423         .target_features = 0,
1424         /* sizes of additional private data for data structures */
1425         .target_priv_sz = sizeof(struct lpfc_nvmet_tgtport),
1426         .lsrqst_priv_sz = 0,
1427 };
1428
1429 static void
1430 __lpfc_nvmet_clean_io_for_cpu(struct lpfc_hba *phba,
1431                 struct lpfc_nvmet_ctx_info *infop)
1432 {
1433         struct lpfc_nvmet_ctxbuf *ctx_buf, *next_ctx_buf;
1434         unsigned long flags;
1435
1436         spin_lock_irqsave(&infop->nvmet_ctx_list_lock, flags);
1437         list_for_each_entry_safe(ctx_buf, next_ctx_buf,
1438                                 &infop->nvmet_ctx_list, list) {
1439                 spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1440                 list_del_init(&ctx_buf->list);
1441                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1442
1443                 spin_lock(&phba->hbalock);
1444                 __lpfc_clear_active_sglq(phba, ctx_buf->sglq->sli4_lxritag);
1445                 spin_unlock(&phba->hbalock);
1446
1447                 ctx_buf->sglq->state = SGL_FREED;
1448                 ctx_buf->sglq->ndlp = NULL;
1449
1450                 spin_lock(&phba->sli4_hba.sgl_list_lock);
1451                 list_add_tail(&ctx_buf->sglq->list,
1452                                 &phba->sli4_hba.lpfc_nvmet_sgl_list);
1453                 spin_unlock(&phba->sli4_hba.sgl_list_lock);
1454
1455                 lpfc_sli_release_iocbq(phba, ctx_buf->iocbq);
1456                 kfree(ctx_buf->context);
1457         }
1458         spin_unlock_irqrestore(&infop->nvmet_ctx_list_lock, flags);
1459 }
1460
1461 static void
1462 lpfc_nvmet_cleanup_io_context(struct lpfc_hba *phba)
1463 {
1464         struct lpfc_nvmet_ctx_info *infop;
1465         int i, j;
1466
1467         /* The first context list, MRQ 0 CPU 0 */
1468         infop = phba->sli4_hba.nvmet_ctx_info;
1469         if (!infop)
1470                 return;
1471
1472         /* Cycle the entire CPU context list for every MRQ */
1473         for (i = 0; i < phba->cfg_nvmet_mrq; i++) {
1474                 for_each_present_cpu(j) {
1475                         infop = lpfc_get_ctx_list(phba, j, i);
1476                         __lpfc_nvmet_clean_io_for_cpu(phba, infop);
1477                 }
1478         }
1479         kfree(phba->sli4_hba.nvmet_ctx_info);
1480         phba->sli4_hba.nvmet_ctx_info = NULL;
1481 }
1482
1483 static int
1484 lpfc_nvmet_setup_io_context(struct lpfc_hba *phba)
1485 {
1486         struct lpfc_nvmet_ctxbuf *ctx_buf;
1487         struct lpfc_iocbq *nvmewqe;
1488         union lpfc_wqe128 *wqe;
1489         struct lpfc_nvmet_ctx_info *last_infop;
1490         struct lpfc_nvmet_ctx_info *infop;
1491         int i, j, idx, cpu;
1492
1493         lpfc_printf_log(phba, KERN_INFO, LOG_NVME,
1494                         "6403 Allocate NVMET resources for %d XRIs\n",
1495                         phba->sli4_hba.nvmet_xri_cnt);
1496
1497         phba->sli4_hba.nvmet_ctx_info = kcalloc(
1498                 phba->sli4_hba.num_possible_cpu * phba->cfg_nvmet_mrq,
1499                 sizeof(struct lpfc_nvmet_ctx_info), GFP_KERNEL);
1500         if (!phba->sli4_hba.nvmet_ctx_info) {
1501                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1502                                 "6419 Failed allocate memory for "
1503                                 "nvmet context lists\n");
1504                 return -ENOMEM;
1505         }
1506
1507         /*
1508          * Assuming X CPUs in the system, and Y MRQs, allocate some
1509          * lpfc_nvmet_ctx_info structures as follows:
1510          *
1511          * cpu0/mrq0 cpu1/mrq0 ... cpuX/mrq0
1512          * cpu0/mrq1 cpu1/mrq1 ... cpuX/mrq1
1513          * ...
1514          * cpuX/mrqY cpuX/mrqY ... cpuX/mrqY
1515          *
1516          * Each line represents a MRQ "silo" containing an entry for
1517          * every CPU.
1518          *
1519          * MRQ X is initially assumed to be associated with CPU X, thus
1520          * contexts are initially distributed across all MRQs using
1521          * the MRQ index (N) as follows cpuN/mrqN. When contexts are
1522          * freed, the are freed to the MRQ silo based on the CPU number
1523          * of the IO completion. Thus a context that was allocated for MRQ A
1524          * whose IO completed on CPU B will be freed to cpuB/mrqA.
1525          */
1526         for_each_possible_cpu(i) {
1527                 for (j = 0; j < phba->cfg_nvmet_mrq; j++) {
1528                         infop = lpfc_get_ctx_list(phba, i, j);
1529                         INIT_LIST_HEAD(&infop->nvmet_ctx_list);
1530                         spin_lock_init(&infop->nvmet_ctx_list_lock);
1531                         infop->nvmet_ctx_list_cnt = 0;
1532                 }
1533         }
1534
1535         /*
1536          * Setup the next CPU context info ptr for each MRQ.
1537          * MRQ 0 will cycle thru CPUs 0 - X separately from
1538          * MRQ 1 cycling thru CPUs 0 - X, and so on.
1539          */
1540         for (j = 0; j < phba->cfg_nvmet_mrq; j++) {
1541                 last_infop = lpfc_get_ctx_list(phba,
1542                                                cpumask_first(cpu_present_mask),
1543                                                j);
1544                 for (i = phba->sli4_hba.num_possible_cpu - 1;  i >= 0; i--) {
1545                         infop = lpfc_get_ctx_list(phba, i, j);
1546                         infop->nvmet_ctx_next_cpu = last_infop;
1547                         last_infop = infop;
1548                 }
1549         }
1550
1551         /* For all nvmet xris, allocate resources needed to process a
1552          * received command on a per xri basis.
1553          */
1554         idx = 0;
1555         cpu = cpumask_first(cpu_present_mask);
1556         for (i = 0; i < phba->sli4_hba.nvmet_xri_cnt; i++) {
1557                 ctx_buf = kzalloc(sizeof(*ctx_buf), GFP_KERNEL);
1558                 if (!ctx_buf) {
1559                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1560                                         "6404 Ran out of memory for NVMET\n");
1561                         return -ENOMEM;
1562                 }
1563
1564                 ctx_buf->context = kzalloc(sizeof(*ctx_buf->context),
1565                                            GFP_KERNEL);
1566                 if (!ctx_buf->context) {
1567                         kfree(ctx_buf);
1568                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1569                                         "6405 Ran out of NVMET "
1570                                         "context memory\n");
1571                         return -ENOMEM;
1572                 }
1573                 ctx_buf->context->ctxbuf = ctx_buf;
1574                 ctx_buf->context->state = LPFC_NVME_STE_FREE;
1575
1576                 ctx_buf->iocbq = lpfc_sli_get_iocbq(phba);
1577                 if (!ctx_buf->iocbq) {
1578                         kfree(ctx_buf->context);
1579                         kfree(ctx_buf);
1580                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1581                                         "6406 Ran out of NVMET iocb/WQEs\n");
1582                         return -ENOMEM;
1583                 }
1584                 ctx_buf->iocbq->cmd_flag = LPFC_IO_NVMET;
1585                 nvmewqe = ctx_buf->iocbq;
1586                 wqe = &nvmewqe->wqe;
1587
1588                 /* Initialize WQE */
1589                 memset(wqe, 0, sizeof(union lpfc_wqe));
1590
1591                 ctx_buf->iocbq->cmd_dmabuf = NULL;
1592                 spin_lock(&phba->sli4_hba.sgl_list_lock);
1593                 ctx_buf->sglq = __lpfc_sli_get_nvmet_sglq(phba, ctx_buf->iocbq);
1594                 spin_unlock(&phba->sli4_hba.sgl_list_lock);
1595                 if (!ctx_buf->sglq) {
1596                         lpfc_sli_release_iocbq(phba, ctx_buf->iocbq);
1597                         kfree(ctx_buf->context);
1598                         kfree(ctx_buf);
1599                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1600                                         "6407 Ran out of NVMET XRIs\n");
1601                         return -ENOMEM;
1602                 }
1603                 INIT_WORK(&ctx_buf->defer_work, lpfc_nvmet_fcp_rqst_defer_work);
1604
1605                 /*
1606                  * Add ctx to MRQidx context list. Our initial assumption
1607                  * is MRQidx will be associated with CPUidx. This association
1608                  * can change on the fly.
1609                  */
1610                 infop = lpfc_get_ctx_list(phba, cpu, idx);
1611                 spin_lock(&infop->nvmet_ctx_list_lock);
1612                 list_add_tail(&ctx_buf->list, &infop->nvmet_ctx_list);
1613                 infop->nvmet_ctx_list_cnt++;
1614                 spin_unlock(&infop->nvmet_ctx_list_lock);
1615
1616                 /* Spread ctx structures evenly across all MRQs */
1617                 idx++;
1618                 if (idx >= phba->cfg_nvmet_mrq) {
1619                         idx = 0;
1620                         cpu = cpumask_first(cpu_present_mask);
1621                         continue;
1622                 }
1623                 cpu = cpumask_next(cpu, cpu_present_mask);
1624                 if (cpu == nr_cpu_ids)
1625                         cpu = cpumask_first(cpu_present_mask);
1626
1627         }
1628
1629         for_each_present_cpu(i) {
1630                 for (j = 0; j < phba->cfg_nvmet_mrq; j++) {
1631                         infop = lpfc_get_ctx_list(phba, i, j);
1632                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME | LOG_INIT,
1633                                         "6408 TOTAL NVMET ctx for CPU %d "
1634                                         "MRQ %d: cnt %d nextcpu x%px\n",
1635                                         i, j, infop->nvmet_ctx_list_cnt,
1636                                         infop->nvmet_ctx_next_cpu);
1637                 }
1638         }
1639         return 0;
1640 }
1641
1642 int
1643 lpfc_nvmet_create_targetport(struct lpfc_hba *phba)
1644 {
1645         struct lpfc_vport  *vport = phba->pport;
1646         struct lpfc_nvmet_tgtport *tgtp;
1647         struct nvmet_fc_port_info pinfo;
1648         int error;
1649
1650         if (phba->targetport)
1651                 return 0;
1652
1653         error = lpfc_nvmet_setup_io_context(phba);
1654         if (error)
1655                 return error;
1656
1657         memset(&pinfo, 0, sizeof(struct nvmet_fc_port_info));
1658         pinfo.node_name = wwn_to_u64(vport->fc_nodename.u.wwn);
1659         pinfo.port_name = wwn_to_u64(vport->fc_portname.u.wwn);
1660         pinfo.port_id = vport->fc_myDID;
1661
1662         /* We need to tell the transport layer + 1 because it takes page
1663          * alignment into account. When space for the SGL is allocated we
1664          * allocate + 3, one for cmd, one for rsp and one for this alignment
1665          */
1666         lpfc_tgttemplate.max_sgl_segments = phba->cfg_nvme_seg_cnt + 1;
1667         lpfc_tgttemplate.max_hw_queues = phba->cfg_hdw_queue;
1668         lpfc_tgttemplate.target_features = NVMET_FCTGTFEAT_READDATA_RSP;
1669
1670 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
1671         error = nvmet_fc_register_targetport(&pinfo, &lpfc_tgttemplate,
1672                                              &phba->pcidev->dev,
1673                                              &phba->targetport);
1674 #else
1675         error = -ENOENT;
1676 #endif
1677         if (error) {
1678                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1679                                 "6025 Cannot register NVME targetport x%x: "
1680                                 "portnm %llx nodenm %llx segs %d qs %d\n",
1681                                 error,
1682                                 pinfo.port_name, pinfo.node_name,
1683                                 lpfc_tgttemplate.max_sgl_segments,
1684                                 lpfc_tgttemplate.max_hw_queues);
1685                 phba->targetport = NULL;
1686                 phba->nvmet_support = 0;
1687
1688                 lpfc_nvmet_cleanup_io_context(phba);
1689
1690         } else {
1691                 tgtp = (struct lpfc_nvmet_tgtport *)
1692                         phba->targetport->private;
1693                 tgtp->phba = phba;
1694
1695                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
1696                                 "6026 Registered NVME "
1697                                 "targetport: x%px, private x%px "
1698                                 "portnm %llx nodenm %llx segs %d qs %d\n",
1699                                 phba->targetport, tgtp,
1700                                 pinfo.port_name, pinfo.node_name,
1701                                 lpfc_tgttemplate.max_sgl_segments,
1702                                 lpfc_tgttemplate.max_hw_queues);
1703
1704                 atomic_set(&tgtp->rcv_ls_req_in, 0);
1705                 atomic_set(&tgtp->rcv_ls_req_out, 0);
1706                 atomic_set(&tgtp->rcv_ls_req_drop, 0);
1707                 atomic_set(&tgtp->xmt_ls_abort, 0);
1708                 atomic_set(&tgtp->xmt_ls_abort_cmpl, 0);
1709                 atomic_set(&tgtp->xmt_ls_rsp, 0);
1710                 atomic_set(&tgtp->xmt_ls_drop, 0);
1711                 atomic_set(&tgtp->xmt_ls_rsp_error, 0);
1712                 atomic_set(&tgtp->xmt_ls_rsp_xb_set, 0);
1713                 atomic_set(&tgtp->xmt_ls_rsp_aborted, 0);
1714                 atomic_set(&tgtp->xmt_ls_rsp_cmpl, 0);
1715                 atomic_set(&tgtp->rcv_fcp_cmd_in, 0);
1716                 atomic_set(&tgtp->rcv_fcp_cmd_out, 0);
1717                 atomic_set(&tgtp->rcv_fcp_cmd_drop, 0);
1718                 atomic_set(&tgtp->xmt_fcp_drop, 0);
1719                 atomic_set(&tgtp->xmt_fcp_read_rsp, 0);
1720                 atomic_set(&tgtp->xmt_fcp_read, 0);
1721                 atomic_set(&tgtp->xmt_fcp_write, 0);
1722                 atomic_set(&tgtp->xmt_fcp_rsp, 0);
1723                 atomic_set(&tgtp->xmt_fcp_release, 0);
1724                 atomic_set(&tgtp->xmt_fcp_rsp_cmpl, 0);
1725                 atomic_set(&tgtp->xmt_fcp_rsp_error, 0);
1726                 atomic_set(&tgtp->xmt_fcp_rsp_xb_set, 0);
1727                 atomic_set(&tgtp->xmt_fcp_rsp_aborted, 0);
1728                 atomic_set(&tgtp->xmt_fcp_rsp_drop, 0);
1729                 atomic_set(&tgtp->xmt_fcp_xri_abort_cqe, 0);
1730                 atomic_set(&tgtp->xmt_fcp_abort, 0);
1731                 atomic_set(&tgtp->xmt_fcp_abort_cmpl, 0);
1732                 atomic_set(&tgtp->xmt_abort_unsol, 0);
1733                 atomic_set(&tgtp->xmt_abort_sol, 0);
1734                 atomic_set(&tgtp->xmt_abort_rsp, 0);
1735                 atomic_set(&tgtp->xmt_abort_rsp_error, 0);
1736                 atomic_set(&tgtp->defer_ctx, 0);
1737                 atomic_set(&tgtp->defer_fod, 0);
1738                 atomic_set(&tgtp->defer_wqfull, 0);
1739         }
1740         return error;
1741 }
1742
1743 int
1744 lpfc_nvmet_update_targetport(struct lpfc_hba *phba)
1745 {
1746         struct lpfc_vport  *vport = phba->pport;
1747
1748         if (!phba->targetport)
1749                 return 0;
1750
1751         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
1752                          "6007 Update NVMET port x%px did x%x\n",
1753                          phba->targetport, vport->fc_myDID);
1754
1755         phba->targetport->port_id = vport->fc_myDID;
1756         return 0;
1757 }
1758
1759 /**
1760  * lpfc_sli4_nvmet_xri_aborted - Fast-path process of nvmet xri abort
1761  * @phba: pointer to lpfc hba data structure.
1762  * @axri: pointer to the nvmet xri abort wcqe structure.
1763  *
1764  * This routine is invoked by the worker thread to process a SLI4 fast-path
1765  * NVMET aborted xri.
1766  **/
1767 void
1768 lpfc_sli4_nvmet_xri_aborted(struct lpfc_hba *phba,
1769                             struct sli4_wcqe_xri_aborted *axri)
1770 {
1771 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
1772         uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
1773         uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
1774         struct lpfc_async_xchg_ctx *ctxp, *next_ctxp;
1775         struct lpfc_nvmet_tgtport *tgtp;
1776         struct nvmefc_tgt_fcp_req *req = NULL;
1777         struct lpfc_nodelist *ndlp;
1778         unsigned long iflag = 0;
1779         int rrq_empty = 0;
1780         bool released = false;
1781
1782         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1783                         "6317 XB aborted xri x%x rxid x%x\n", xri, rxid);
1784
1785         if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_NVME))
1786                 return;
1787
1788         if (phba->targetport) {
1789                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
1790                 atomic_inc(&tgtp->xmt_fcp_xri_abort_cqe);
1791         }
1792
1793         spin_lock_irqsave(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1794         list_for_each_entry_safe(ctxp, next_ctxp,
1795                                  &phba->sli4_hba.lpfc_abts_nvmet_ctx_list,
1796                                  list) {
1797                 if (ctxp->ctxbuf->sglq->sli4_xritag != xri)
1798                         continue;
1799
1800                 spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock,
1801                                        iflag);
1802
1803                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
1804                 /* Check if we already received a free context call
1805                  * and we have completed processing an abort situation.
1806                  */
1807                 if (ctxp->flag & LPFC_NVME_CTX_RLS &&
1808                     !(ctxp->flag & LPFC_NVME_ABORT_OP)) {
1809                         spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1810                         list_del_init(&ctxp->list);
1811                         spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1812                         released = true;
1813                 }
1814                 ctxp->flag &= ~LPFC_NVME_XBUSY;
1815                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1816
1817                 rrq_empty = list_empty(&phba->active_rrq_list);
1818                 ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
1819                 if (ndlp &&
1820                     (ndlp->nlp_state == NLP_STE_UNMAPPED_NODE ||
1821                      ndlp->nlp_state == NLP_STE_MAPPED_NODE)) {
1822                         lpfc_set_rrq_active(phba, ndlp,
1823                                 ctxp->ctxbuf->sglq->sli4_lxritag,
1824                                 rxid, 1);
1825                         lpfc_sli4_abts_err_handler(phba, ndlp, axri);
1826                 }
1827
1828                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1829                                 "6318 XB aborted oxid x%x flg x%x (%x)\n",
1830                                 ctxp->oxid, ctxp->flag, released);
1831                 if (released)
1832                         lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
1833
1834                 if (rrq_empty)
1835                         lpfc_worker_wake_up(phba);
1836                 return;
1837         }
1838         spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1839         ctxp = lpfc_nvmet_get_ctx_for_xri(phba, xri);
1840         if (ctxp) {
1841                 /*
1842                  *  Abort already done by FW, so BA_ACC sent.
1843                  *  However, the transport may be unaware.
1844                  */
1845                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1846                                 "6323 NVMET Rcv ABTS xri x%x ctxp state x%x "
1847                                 "flag x%x oxid x%x rxid x%x\n",
1848                                 xri, ctxp->state, ctxp->flag, ctxp->oxid,
1849                                 rxid);
1850
1851                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
1852                 ctxp->flag |= LPFC_NVME_ABTS_RCV;
1853                 ctxp->state = LPFC_NVME_STE_ABORT;
1854                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1855
1856                 lpfc_nvmeio_data(phba,
1857                                  "NVMET ABTS RCV: xri x%x CPU %02x rjt %d\n",
1858                                  xri, raw_smp_processor_id(), 0);
1859
1860                 req = &ctxp->hdlrctx.fcp_req;
1861                 if (req)
1862                         nvmet_fc_rcv_fcp_abort(phba->targetport, req);
1863         }
1864 #endif
1865 }
1866
1867 int
1868 lpfc_nvmet_rcv_unsol_abort(struct lpfc_vport *vport,
1869                            struct fc_frame_header *fc_hdr)
1870 {
1871 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
1872         struct lpfc_hba *phba = vport->phba;
1873         struct lpfc_async_xchg_ctx *ctxp, *next_ctxp;
1874         struct nvmefc_tgt_fcp_req *rsp;
1875         uint32_t sid;
1876         uint16_t oxid, xri;
1877         unsigned long iflag = 0;
1878
1879         sid = sli4_sid_from_fc_hdr(fc_hdr);
1880         oxid = be16_to_cpu(fc_hdr->fh_ox_id);
1881
1882         spin_lock_irqsave(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1883         list_for_each_entry_safe(ctxp, next_ctxp,
1884                                  &phba->sli4_hba.lpfc_abts_nvmet_ctx_list,
1885                                  list) {
1886                 if (ctxp->oxid != oxid || ctxp->sid != sid)
1887                         continue;
1888
1889                 xri = ctxp->ctxbuf->sglq->sli4_xritag;
1890
1891                 spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock,
1892                                        iflag);
1893                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
1894                 ctxp->flag |= LPFC_NVME_ABTS_RCV;
1895                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1896
1897                 lpfc_nvmeio_data(phba,
1898                         "NVMET ABTS RCV: xri x%x CPU %02x rjt %d\n",
1899                         xri, raw_smp_processor_id(), 0);
1900
1901                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1902                                 "6319 NVMET Rcv ABTS:acc xri x%x\n", xri);
1903
1904                 rsp = &ctxp->hdlrctx.fcp_req;
1905                 nvmet_fc_rcv_fcp_abort(phba->targetport, rsp);
1906
1907                 /* Respond with BA_ACC accordingly */
1908                 lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 1);
1909                 return 0;
1910         }
1911         spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1912         /* check the wait list */
1913         if (phba->sli4_hba.nvmet_io_wait_cnt) {
1914                 struct rqb_dmabuf *nvmebuf;
1915                 struct fc_frame_header *fc_hdr_tmp;
1916                 u32 sid_tmp;
1917                 u16 oxid_tmp;
1918                 bool found = false;
1919
1920                 spin_lock_irqsave(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
1921
1922                 /* match by oxid and s_id */
1923                 list_for_each_entry(nvmebuf,
1924                                     &phba->sli4_hba.lpfc_nvmet_io_wait_list,
1925                                     hbuf.list) {
1926                         fc_hdr_tmp = (struct fc_frame_header *)
1927                                         (nvmebuf->hbuf.virt);
1928                         oxid_tmp = be16_to_cpu(fc_hdr_tmp->fh_ox_id);
1929                         sid_tmp = sli4_sid_from_fc_hdr(fc_hdr_tmp);
1930                         if (oxid_tmp != oxid || sid_tmp != sid)
1931                                 continue;
1932
1933                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1934                                         "6321 NVMET Rcv ABTS oxid x%x from x%x "
1935                                         "is waiting for a ctxp\n",
1936                                         oxid, sid);
1937
1938                         list_del_init(&nvmebuf->hbuf.list);
1939                         phba->sli4_hba.nvmet_io_wait_cnt--;
1940                         found = true;
1941                         break;
1942                 }
1943                 spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock,
1944                                        iflag);
1945
1946                 /* free buffer since already posted a new DMA buffer to RQ */
1947                 if (found) {
1948                         nvmebuf->hrq->rqbp->rqb_free_buffer(phba, nvmebuf);
1949                         /* Respond with BA_ACC accordingly */
1950                         lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 1);
1951                         return 0;
1952                 }
1953         }
1954
1955         /* check active list */
1956         ctxp = lpfc_nvmet_get_ctx_for_oxid(phba, oxid, sid);
1957         if (ctxp) {
1958                 xri = ctxp->ctxbuf->sglq->sli4_xritag;
1959
1960                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
1961                 ctxp->flag |= (LPFC_NVME_ABTS_RCV | LPFC_NVME_ABORT_OP);
1962                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1963
1964                 lpfc_nvmeio_data(phba,
1965                                  "NVMET ABTS RCV: xri x%x CPU %02x rjt %d\n",
1966                                  xri, raw_smp_processor_id(), 0);
1967
1968                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1969                                 "6322 NVMET Rcv ABTS:acc oxid x%x xri x%x "
1970                                 "flag x%x state x%x\n",
1971                                 ctxp->oxid, xri, ctxp->flag, ctxp->state);
1972
1973                 if (ctxp->flag & LPFC_NVME_TNOTIFY) {
1974                         /* Notify the transport */
1975                         nvmet_fc_rcv_fcp_abort(phba->targetport,
1976                                                &ctxp->hdlrctx.fcp_req);
1977                 } else {
1978                         cancel_work_sync(&ctxp->ctxbuf->defer_work);
1979                         spin_lock_irqsave(&ctxp->ctxlock, iflag);
1980                         lpfc_nvmet_defer_release(phba, ctxp);
1981                         spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1982                 }
1983                 lpfc_nvmet_sol_fcp_issue_abort(phba, ctxp, ctxp->sid,
1984                                                ctxp->oxid);
1985
1986                 lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 1);
1987                 return 0;
1988         }
1989
1990         lpfc_nvmeio_data(phba, "NVMET ABTS RCV: oxid x%x CPU %02x rjt %d\n",
1991                          oxid, raw_smp_processor_id(), 1);
1992
1993         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1994                         "6320 NVMET Rcv ABTS:rjt oxid x%x\n", oxid);
1995
1996         /* Respond with BA_RJT accordingly */
1997         lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 0);
1998 #endif
1999         return 0;
2000 }
2001
2002 static void
2003 lpfc_nvmet_wqfull_flush(struct lpfc_hba *phba, struct lpfc_queue *wq,
2004                         struct lpfc_async_xchg_ctx *ctxp)
2005 {
2006         struct lpfc_sli_ring *pring;
2007         struct lpfc_iocbq *nvmewqeq;
2008         struct lpfc_iocbq *next_nvmewqeq;
2009         unsigned long iflags;
2010         struct lpfc_wcqe_complete wcqe;
2011         struct lpfc_wcqe_complete *wcqep;
2012
2013         pring = wq->pring;
2014         wcqep = &wcqe;
2015
2016         /* Fake an ABORT error code back to cmpl routine */
2017         memset(wcqep, 0, sizeof(struct lpfc_wcqe_complete));
2018         bf_set(lpfc_wcqe_c_status, wcqep, IOSTAT_LOCAL_REJECT);
2019         wcqep->parameter = IOERR_ABORT_REQUESTED;
2020
2021         spin_lock_irqsave(&pring->ring_lock, iflags);
2022         list_for_each_entry_safe(nvmewqeq, next_nvmewqeq,
2023                                  &wq->wqfull_list, list) {
2024                 if (ctxp) {
2025                         /* Checking for a specific IO to flush */
2026                         if (nvmewqeq->context_un.axchg == ctxp) {
2027                                 list_del(&nvmewqeq->list);
2028                                 spin_unlock_irqrestore(&pring->ring_lock,
2029                                                        iflags);
2030                                 memcpy(&nvmewqeq->wcqe_cmpl, wcqep,
2031                                        sizeof(*wcqep));
2032                                 lpfc_nvmet_xmt_fcp_op_cmp(phba, nvmewqeq,
2033                                                           nvmewqeq);
2034                                 return;
2035                         }
2036                         continue;
2037                 } else {
2038                         /* Flush all IOs */
2039                         list_del(&nvmewqeq->list);
2040                         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2041                         memcpy(&nvmewqeq->wcqe_cmpl, wcqep, sizeof(*wcqep));
2042                         lpfc_nvmet_xmt_fcp_op_cmp(phba, nvmewqeq, nvmewqeq);
2043                         spin_lock_irqsave(&pring->ring_lock, iflags);
2044                 }
2045         }
2046         if (!ctxp)
2047                 wq->q_flag &= ~HBA_NVMET_WQFULL;
2048         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2049 }
2050
2051 void
2052 lpfc_nvmet_wqfull_process(struct lpfc_hba *phba,
2053                           struct lpfc_queue *wq)
2054 {
2055 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2056         struct lpfc_sli_ring *pring;
2057         struct lpfc_iocbq *nvmewqeq;
2058         struct lpfc_async_xchg_ctx *ctxp;
2059         unsigned long iflags;
2060         int rc;
2061
2062         /*
2063          * Some WQE slots are available, so try to re-issue anything
2064          * on the WQ wqfull_list.
2065          */
2066         pring = wq->pring;
2067         spin_lock_irqsave(&pring->ring_lock, iflags);
2068         while (!list_empty(&wq->wqfull_list)) {
2069                 list_remove_head(&wq->wqfull_list, nvmewqeq, struct lpfc_iocbq,
2070                                  list);
2071                 spin_unlock_irqrestore(&pring->ring_lock, iflags);
2072                 ctxp = nvmewqeq->context_un.axchg;
2073                 rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, nvmewqeq);
2074                 spin_lock_irqsave(&pring->ring_lock, iflags);
2075                 if (rc == -EBUSY) {
2076                         /* WQ was full again, so put it back on the list */
2077                         list_add(&nvmewqeq->list, &wq->wqfull_list);
2078                         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2079                         return;
2080                 }
2081                 if (rc == WQE_SUCCESS) {
2082 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2083                         if (ctxp->ts_cmd_nvme) {
2084                                 if (ctxp->hdlrctx.fcp_req.op == NVMET_FCOP_RSP)
2085                                         ctxp->ts_status_wqput = ktime_get_ns();
2086                                 else
2087                                         ctxp->ts_data_wqput = ktime_get_ns();
2088                         }
2089 #endif
2090                 } else {
2091                         WARN_ON(rc);
2092                 }
2093         }
2094         wq->q_flag &= ~HBA_NVMET_WQFULL;
2095         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2096
2097 #endif
2098 }
2099
2100 void
2101 lpfc_nvmet_destroy_targetport(struct lpfc_hba *phba)
2102 {
2103 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2104         struct lpfc_nvmet_tgtport *tgtp;
2105         struct lpfc_queue *wq;
2106         uint32_t qidx;
2107         DECLARE_COMPLETION_ONSTACK(tport_unreg_cmp);
2108
2109         if (phba->nvmet_support == 0)
2110                 return;
2111         if (phba->targetport) {
2112                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2113                 for (qidx = 0; qidx < phba->cfg_hdw_queue; qidx++) {
2114                         wq = phba->sli4_hba.hdwq[qidx].io_wq;
2115                         lpfc_nvmet_wqfull_flush(phba, wq, NULL);
2116                 }
2117                 tgtp->tport_unreg_cmp = &tport_unreg_cmp;
2118                 nvmet_fc_unregister_targetport(phba->targetport);
2119                 if (!wait_for_completion_timeout(&tport_unreg_cmp,
2120                                         msecs_to_jiffies(LPFC_NVMET_WAIT_TMO)))
2121                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2122                                         "6179 Unreg targetport x%px timeout "
2123                                         "reached.\n", phba->targetport);
2124                 lpfc_nvmet_cleanup_io_context(phba);
2125         }
2126         phba->targetport = NULL;
2127 #endif
2128 }
2129
2130 /**
2131  * lpfc_nvmet_handle_lsreq - Process an NVME LS request
2132  * @phba: pointer to lpfc hba data structure.
2133  * @axchg: pointer to exchange context for the NVME LS request
2134  *
2135  * This routine is used for processing an asychronously received NVME LS
2136  * request. Any remaining validation is done and the LS is then forwarded
2137  * to the nvmet-fc transport via nvmet_fc_rcv_ls_req().
2138  *
2139  * The calling sequence should be: nvmet_fc_rcv_ls_req() -> (processing)
2140  * -> lpfc_nvmet_xmt_ls_rsp/cmp -> req->done.
2141  * lpfc_nvme_xmt_ls_rsp_cmp should free the allocated axchg.
2142  *
2143  * Returns 0 if LS was handled and delivered to the transport
2144  * Returns 1 if LS failed to be handled and should be dropped
2145  */
2146 int
2147 lpfc_nvmet_handle_lsreq(struct lpfc_hba *phba,
2148                         struct lpfc_async_xchg_ctx *axchg)
2149 {
2150 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2151         struct lpfc_nvmet_tgtport *tgtp = phba->targetport->private;
2152         uint32_t *payload = axchg->payload;
2153         int rc;
2154
2155         atomic_inc(&tgtp->rcv_ls_req_in);
2156
2157         /*
2158          * Driver passes the ndlp as the hosthandle argument allowing
2159          * the transport to generate LS requests for any associateions
2160          * that are created.
2161          */
2162         rc = nvmet_fc_rcv_ls_req(phba->targetport, axchg->ndlp, &axchg->ls_rsp,
2163                                  axchg->payload, axchg->size);
2164
2165         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
2166                         "6037 NVMET Unsol rcv: sz %d rc %d: %08x %08x %08x "
2167                         "%08x %08x %08x\n", axchg->size, rc,
2168                         *payload, *(payload+1), *(payload+2),
2169                         *(payload+3), *(payload+4), *(payload+5));
2170
2171         if (!rc) {
2172                 atomic_inc(&tgtp->rcv_ls_req_out);
2173                 return 0;
2174         }
2175
2176         atomic_inc(&tgtp->rcv_ls_req_drop);
2177 #endif
2178         return 1;
2179 }
2180
2181 static void
2182 lpfc_nvmet_process_rcv_fcp_req(struct lpfc_nvmet_ctxbuf *ctx_buf)
2183 {
2184 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2185         struct lpfc_async_xchg_ctx *ctxp = ctx_buf->context;
2186         struct lpfc_hba *phba = ctxp->phba;
2187         struct rqb_dmabuf *nvmebuf = ctxp->rqb_buffer;
2188         struct lpfc_nvmet_tgtport *tgtp;
2189         uint32_t *payload, qno;
2190         uint32_t rc;
2191         unsigned long iflags;
2192
2193         if (!nvmebuf) {
2194                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2195                         "6159 process_rcv_fcp_req, nvmebuf is NULL, "
2196                         "oxid: x%x flg: x%x state: x%x\n",
2197                         ctxp->oxid, ctxp->flag, ctxp->state);
2198                 spin_lock_irqsave(&ctxp->ctxlock, iflags);
2199                 lpfc_nvmet_defer_release(phba, ctxp);
2200                 spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2201                 lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid,
2202                                                  ctxp->oxid);
2203                 return;
2204         }
2205
2206         if (ctxp->flag & LPFC_NVME_ABTS_RCV) {
2207                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2208                                 "6324 IO oxid x%x aborted\n",
2209                                 ctxp->oxid);
2210                 return;
2211         }
2212
2213         payload = (uint32_t *)(nvmebuf->dbuf.virt);
2214         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2215         ctxp->flag |= LPFC_NVME_TNOTIFY;
2216 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2217         if (ctxp->ts_isr_cmd)
2218                 ctxp->ts_cmd_nvme = ktime_get_ns();
2219 #endif
2220         /*
2221          * The calling sequence should be:
2222          * nvmet_fc_rcv_fcp_req->lpfc_nvmet_xmt_fcp_op/cmp- req->done
2223          * lpfc_nvmet_xmt_fcp_op_cmp should free the allocated ctxp.
2224          * When we return from nvmet_fc_rcv_fcp_req, all relevant info
2225          * the NVME command / FC header is stored.
2226          * A buffer has already been reposted for this IO, so just free
2227          * the nvmebuf.
2228          */
2229         rc = nvmet_fc_rcv_fcp_req(phba->targetport, &ctxp->hdlrctx.fcp_req,
2230                                   payload, ctxp->size);
2231         /* Process FCP command */
2232         if (rc == 0) {
2233                 atomic_inc(&tgtp->rcv_fcp_cmd_out);
2234                 spin_lock_irqsave(&ctxp->ctxlock, iflags);
2235                 if ((ctxp->flag & LPFC_NVME_CTX_REUSE_WQ) ||
2236                     (nvmebuf != ctxp->rqb_buffer)) {
2237                         spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2238                         return;
2239                 }
2240                 ctxp->rqb_buffer = NULL;
2241                 spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2242                 lpfc_rq_buf_free(phba, &nvmebuf->hbuf); /* repost */
2243                 return;
2244         }
2245
2246         /* Processing of FCP command is deferred */
2247         if (rc == -EOVERFLOW) {
2248                 lpfc_nvmeio_data(phba, "NVMET RCV BUSY: xri x%x sz %d "
2249                                  "from %06x\n",
2250                                  ctxp->oxid, ctxp->size, ctxp->sid);
2251                 atomic_inc(&tgtp->rcv_fcp_cmd_out);
2252                 atomic_inc(&tgtp->defer_fod);
2253                 spin_lock_irqsave(&ctxp->ctxlock, iflags);
2254                 if (ctxp->flag & LPFC_NVME_CTX_REUSE_WQ) {
2255                         spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2256                         return;
2257                 }
2258                 spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2259                 /*
2260                  * Post a replacement DMA buffer to RQ and defer
2261                  * freeing rcv buffer till .defer_rcv callback
2262                  */
2263                 qno = nvmebuf->idx;
2264                 lpfc_post_rq_buffer(
2265                         phba, phba->sli4_hba.nvmet_mrq_hdr[qno],
2266                         phba->sli4_hba.nvmet_mrq_data[qno], 1, qno);
2267                 return;
2268         }
2269         ctxp->flag &= ~LPFC_NVME_TNOTIFY;
2270         atomic_inc(&tgtp->rcv_fcp_cmd_drop);
2271         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2272                         "2582 FCP Drop IO x%x: err x%x: x%x x%x x%x\n",
2273                         ctxp->oxid, rc,
2274                         atomic_read(&tgtp->rcv_fcp_cmd_in),
2275                         atomic_read(&tgtp->rcv_fcp_cmd_out),
2276                         atomic_read(&tgtp->xmt_fcp_release));
2277         lpfc_nvmeio_data(phba, "NVMET FCP DROP: xri x%x sz %d from %06x\n",
2278                          ctxp->oxid, ctxp->size, ctxp->sid);
2279         spin_lock_irqsave(&ctxp->ctxlock, iflags);
2280         lpfc_nvmet_defer_release(phba, ctxp);
2281         spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2282         lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid, ctxp->oxid);
2283 #endif
2284 }
2285
2286 static void
2287 lpfc_nvmet_fcp_rqst_defer_work(struct work_struct *work)
2288 {
2289 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2290         struct lpfc_nvmet_ctxbuf *ctx_buf =
2291                 container_of(work, struct lpfc_nvmet_ctxbuf, defer_work);
2292
2293         lpfc_nvmet_process_rcv_fcp_req(ctx_buf);
2294 #endif
2295 }
2296
2297 static struct lpfc_nvmet_ctxbuf *
2298 lpfc_nvmet_replenish_context(struct lpfc_hba *phba,
2299                              struct lpfc_nvmet_ctx_info *current_infop)
2300 {
2301 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2302         struct lpfc_nvmet_ctxbuf *ctx_buf = NULL;
2303         struct lpfc_nvmet_ctx_info *get_infop;
2304         int i;
2305
2306         /*
2307          * The current_infop for the MRQ a NVME command IU was received
2308          * on is empty. Our goal is to replenish this MRQs context
2309          * list from a another CPUs.
2310          *
2311          * First we need to pick a context list to start looking on.
2312          * nvmet_ctx_start_cpu has available context the last time
2313          * we needed to replenish this CPU where nvmet_ctx_next_cpu
2314          * is just the next sequential CPU for this MRQ.
2315          */
2316         if (current_infop->nvmet_ctx_start_cpu)
2317                 get_infop = current_infop->nvmet_ctx_start_cpu;
2318         else
2319                 get_infop = current_infop->nvmet_ctx_next_cpu;
2320
2321         for (i = 0; i < phba->sli4_hba.num_possible_cpu; i++) {
2322                 if (get_infop == current_infop) {
2323                         get_infop = get_infop->nvmet_ctx_next_cpu;
2324                         continue;
2325                 }
2326                 spin_lock(&get_infop->nvmet_ctx_list_lock);
2327
2328                 /* Just take the entire context list, if there are any */
2329                 if (get_infop->nvmet_ctx_list_cnt) {
2330                         list_splice_init(&get_infop->nvmet_ctx_list,
2331                                     &current_infop->nvmet_ctx_list);
2332                         current_infop->nvmet_ctx_list_cnt =
2333                                 get_infop->nvmet_ctx_list_cnt - 1;
2334                         get_infop->nvmet_ctx_list_cnt = 0;
2335                         spin_unlock(&get_infop->nvmet_ctx_list_lock);
2336
2337                         current_infop->nvmet_ctx_start_cpu = get_infop;
2338                         list_remove_head(&current_infop->nvmet_ctx_list,
2339                                          ctx_buf, struct lpfc_nvmet_ctxbuf,
2340                                          list);
2341                         return ctx_buf;
2342                 }
2343
2344                 /* Otherwise, move on to the next CPU for this MRQ */
2345                 spin_unlock(&get_infop->nvmet_ctx_list_lock);
2346                 get_infop = get_infop->nvmet_ctx_next_cpu;
2347         }
2348
2349 #endif
2350         /* Nothing found, all contexts for the MRQ are in-flight */
2351         return NULL;
2352 }
2353
2354 /**
2355  * lpfc_nvmet_unsol_fcp_buffer - Process an unsolicited event data buffer
2356  * @phba: pointer to lpfc hba data structure.
2357  * @idx: relative index of MRQ vector
2358  * @nvmebuf: pointer to lpfc nvme command HBQ data structure.
2359  * @isr_timestamp: in jiffies.
2360  * @cqflag: cq processing information regarding workload.
2361  *
2362  * This routine is used for processing the WQE associated with a unsolicited
2363  * event. It first determines whether there is an existing ndlp that matches
2364  * the DID from the unsolicited WQE. If not, it will create a new one with
2365  * the DID from the unsolicited WQE. The ELS command from the unsolicited
2366  * WQE is then used to invoke the proper routine and to set up proper state
2367  * of the discovery state machine.
2368  **/
2369 static void
2370 lpfc_nvmet_unsol_fcp_buffer(struct lpfc_hba *phba,
2371                             uint32_t idx,
2372                             struct rqb_dmabuf *nvmebuf,
2373                             uint64_t isr_timestamp,
2374                             uint8_t cqflag)
2375 {
2376         struct lpfc_async_xchg_ctx *ctxp;
2377         struct lpfc_nvmet_tgtport *tgtp;
2378         struct fc_frame_header *fc_hdr;
2379         struct lpfc_nvmet_ctxbuf *ctx_buf;
2380         struct lpfc_nvmet_ctx_info *current_infop;
2381         uint32_t size, oxid, sid, qno;
2382         unsigned long iflag;
2383         int current_cpu;
2384
2385         if (!IS_ENABLED(CONFIG_NVME_TARGET_FC))
2386                 return;
2387
2388         ctx_buf = NULL;
2389         if (!nvmebuf || !phba->targetport) {
2390                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2391                                 "6157 NVMET FCP Drop IO\n");
2392                 if (nvmebuf)
2393                         lpfc_rq_buf_free(phba, &nvmebuf->hbuf);
2394                 return;
2395         }
2396
2397         /*
2398          * Get a pointer to the context list for this MRQ based on
2399          * the CPU this MRQ IRQ is associated with. If the CPU association
2400          * changes from our initial assumption, the context list could
2401          * be empty, thus it would need to be replenished with the
2402          * context list from another CPU for this MRQ.
2403          */
2404         current_cpu = raw_smp_processor_id();
2405         current_infop = lpfc_get_ctx_list(phba, current_cpu, idx);
2406         spin_lock_irqsave(&current_infop->nvmet_ctx_list_lock, iflag);
2407         if (current_infop->nvmet_ctx_list_cnt) {
2408                 list_remove_head(&current_infop->nvmet_ctx_list,
2409                                  ctx_buf, struct lpfc_nvmet_ctxbuf, list);
2410                 current_infop->nvmet_ctx_list_cnt--;
2411         } else {
2412                 ctx_buf = lpfc_nvmet_replenish_context(phba, current_infop);
2413         }
2414         spin_unlock_irqrestore(&current_infop->nvmet_ctx_list_lock, iflag);
2415
2416         fc_hdr = (struct fc_frame_header *)(nvmebuf->hbuf.virt);
2417         oxid = be16_to_cpu(fc_hdr->fh_ox_id);
2418         size = nvmebuf->bytes_recv;
2419
2420 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2421         if (phba->hdwqstat_on & LPFC_CHECK_NVMET_IO) {
2422                 this_cpu_inc(phba->sli4_hba.c_stat->rcv_io);
2423                 if (idx != current_cpu)
2424                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
2425                                         "6703 CPU Check rcv: "
2426                                         "cpu %d expect %d\n",
2427                                         current_cpu, idx);
2428         }
2429 #endif
2430
2431         lpfc_nvmeio_data(phba, "NVMET FCP  RCV: xri x%x sz %d CPU %02x\n",
2432                          oxid, size, raw_smp_processor_id());
2433
2434         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2435
2436         if (!ctx_buf) {
2437                 /* Queue this NVME IO to process later */
2438                 spin_lock_irqsave(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
2439                 list_add_tail(&nvmebuf->hbuf.list,
2440                               &phba->sli4_hba.lpfc_nvmet_io_wait_list);
2441                 phba->sli4_hba.nvmet_io_wait_cnt++;
2442                 phba->sli4_hba.nvmet_io_wait_total++;
2443                 spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock,
2444                                        iflag);
2445
2446                 /* Post a brand new DMA buffer to RQ */
2447                 qno = nvmebuf->idx;
2448                 lpfc_post_rq_buffer(
2449                         phba, phba->sli4_hba.nvmet_mrq_hdr[qno],
2450                         phba->sli4_hba.nvmet_mrq_data[qno], 1, qno);
2451
2452                 atomic_inc(&tgtp->defer_ctx);
2453                 return;
2454         }
2455
2456         sid = sli4_sid_from_fc_hdr(fc_hdr);
2457
2458         ctxp = (struct lpfc_async_xchg_ctx *)ctx_buf->context;
2459         spin_lock_irqsave(&phba->sli4_hba.t_active_list_lock, iflag);
2460         list_add_tail(&ctxp->list, &phba->sli4_hba.t_active_ctx_list);
2461         spin_unlock_irqrestore(&phba->sli4_hba.t_active_list_lock, iflag);
2462         if (ctxp->state != LPFC_NVME_STE_FREE) {
2463                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2464                                 "6414 NVMET Context corrupt %d %d oxid x%x\n",
2465                                 ctxp->state, ctxp->entry_cnt, ctxp->oxid);
2466         }
2467         ctxp->wqeq = NULL;
2468         ctxp->offset = 0;
2469         ctxp->phba = phba;
2470         ctxp->size = size;
2471         ctxp->oxid = oxid;
2472         ctxp->sid = sid;
2473         ctxp->idx = idx;
2474         ctxp->state = LPFC_NVME_STE_RCV;
2475         ctxp->entry_cnt = 1;
2476         ctxp->flag = 0;
2477         ctxp->ctxbuf = ctx_buf;
2478         ctxp->rqb_buffer = (void *)nvmebuf;
2479         ctxp->hdwq = NULL;
2480         spin_lock_init(&ctxp->ctxlock);
2481
2482 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2483         if (isr_timestamp)
2484                 ctxp->ts_isr_cmd = isr_timestamp;
2485         ctxp->ts_cmd_nvme = 0;
2486         ctxp->ts_nvme_data = 0;
2487         ctxp->ts_data_wqput = 0;
2488         ctxp->ts_isr_data = 0;
2489         ctxp->ts_data_nvme = 0;
2490         ctxp->ts_nvme_status = 0;
2491         ctxp->ts_status_wqput = 0;
2492         ctxp->ts_isr_status = 0;
2493         ctxp->ts_status_nvme = 0;
2494 #endif
2495
2496         atomic_inc(&tgtp->rcv_fcp_cmd_in);
2497         /* check for cq processing load */
2498         if (!cqflag) {
2499                 lpfc_nvmet_process_rcv_fcp_req(ctx_buf);
2500                 return;
2501         }
2502
2503         if (!queue_work(phba->wq, &ctx_buf->defer_work)) {
2504                 atomic_inc(&tgtp->rcv_fcp_cmd_drop);
2505                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2506                                 "6325 Unable to queue work for oxid x%x. "
2507                                 "FCP Drop IO [x%x x%x x%x]\n",
2508                                 ctxp->oxid,
2509                                 atomic_read(&tgtp->rcv_fcp_cmd_in),
2510                                 atomic_read(&tgtp->rcv_fcp_cmd_out),
2511                                 atomic_read(&tgtp->xmt_fcp_release));
2512
2513                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
2514                 lpfc_nvmet_defer_release(phba, ctxp);
2515                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
2516                 lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, sid, oxid);
2517         }
2518 }
2519
2520 /**
2521  * lpfc_nvmet_unsol_fcp_event - Process an unsolicited event from an nvme nport
2522  * @phba: pointer to lpfc hba data structure.
2523  * @idx: relative index of MRQ vector
2524  * @nvmebuf: pointer to received nvme data structure.
2525  * @isr_timestamp: in jiffies.
2526  * @cqflag: cq processing information regarding workload.
2527  *
2528  * This routine is used to process an unsolicited event received from a SLI
2529  * (Service Level Interface) ring. The actual processing of the data buffer
2530  * associated with the unsolicited event is done by invoking the routine
2531  * lpfc_nvmet_unsol_fcp_buffer() after properly set up the buffer from the
2532  * SLI RQ on which the unsolicited event was received.
2533  **/
2534 void
2535 lpfc_nvmet_unsol_fcp_event(struct lpfc_hba *phba,
2536                            uint32_t idx,
2537                            struct rqb_dmabuf *nvmebuf,
2538                            uint64_t isr_timestamp,
2539                            uint8_t cqflag)
2540 {
2541         if (!nvmebuf) {
2542                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2543                                 "3167 NVMET FCP Drop IO\n");
2544                 return;
2545         }
2546         if (phba->nvmet_support == 0) {
2547                 lpfc_rq_buf_free(phba, &nvmebuf->hbuf);
2548                 return;
2549         }
2550         lpfc_nvmet_unsol_fcp_buffer(phba, idx, nvmebuf, isr_timestamp, cqflag);
2551 }
2552
2553 /**
2554  * lpfc_nvmet_prep_ls_wqe - Allocate and prepare a lpfc wqe data structure
2555  * @phba: pointer to a host N_Port data structure.
2556  * @ctxp: Context info for NVME LS Request
2557  * @rspbuf: DMA buffer of NVME command.
2558  * @rspsize: size of the NVME command.
2559  *
2560  * This routine is used for allocating a lpfc-WQE data structure from
2561  * the driver lpfc-WQE free-list and prepare the WQE with the parameters
2562  * passed into the routine for discovery state machine to issue an Extended
2563  * Link Service (NVME) commands. It is a generic lpfc-WQE allocation
2564  * and preparation routine that is used by all the discovery state machine
2565  * routines and the NVME command-specific fields will be later set up by
2566  * the individual discovery machine routines after calling this routine
2567  * allocating and preparing a generic WQE data structure. It fills in the
2568  * Buffer Descriptor Entries (BDEs), allocates buffers for both command
2569  * payload and response payload (if expected). The reference count on the
2570  * ndlp is incremented by 1 and the reference to the ndlp is put into
2571  * context1 of the WQE data structure for this WQE to hold the ndlp
2572  * reference for the command's callback function to access later.
2573  *
2574  * Return code
2575  *   Pointer to the newly allocated/prepared nvme wqe data structure
2576  *   NULL - when nvme wqe data structure allocation/preparation failed
2577  **/
2578 static struct lpfc_iocbq *
2579 lpfc_nvmet_prep_ls_wqe(struct lpfc_hba *phba,
2580                        struct lpfc_async_xchg_ctx *ctxp,
2581                        dma_addr_t rspbuf, uint16_t rspsize)
2582 {
2583         struct lpfc_nodelist *ndlp;
2584         struct lpfc_iocbq *nvmewqe;
2585         union lpfc_wqe128 *wqe;
2586
2587         if (!lpfc_is_link_up(phba)) {
2588                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2589                                 "6104 NVMET prep LS wqe: link err: "
2590                                 "NPORT x%x oxid:x%x ste %d\n",
2591                                 ctxp->sid, ctxp->oxid, ctxp->state);
2592                 return NULL;
2593         }
2594
2595         /* Allocate buffer for  command wqe */
2596         nvmewqe = lpfc_sli_get_iocbq(phba);
2597         if (nvmewqe == NULL) {
2598                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2599                                 "6105 NVMET prep LS wqe: No WQE: "
2600                                 "NPORT x%x oxid x%x ste %d\n",
2601                                 ctxp->sid, ctxp->oxid, ctxp->state);
2602                 return NULL;
2603         }
2604
2605         ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
2606         if (!ndlp ||
2607             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
2608             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
2609                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2610                                 "6106 NVMET prep LS wqe: No ndlp: "
2611                                 "NPORT x%x oxid x%x ste %d\n",
2612                                 ctxp->sid, ctxp->oxid, ctxp->state);
2613                 goto nvme_wqe_free_wqeq_exit;
2614         }
2615         ctxp->wqeq = nvmewqe;
2616
2617         /* prevent preparing wqe with NULL ndlp reference */
2618         nvmewqe->ndlp = lpfc_nlp_get(ndlp);
2619         if (!nvmewqe->ndlp)
2620                 goto nvme_wqe_free_wqeq_exit;
2621         nvmewqe->context_un.axchg = ctxp;
2622
2623         wqe = &nvmewqe->wqe;
2624         memset(wqe, 0, sizeof(union lpfc_wqe));
2625
2626         /* Words 0 - 2 */
2627         wqe->xmit_sequence.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2628         wqe->xmit_sequence.bde.tus.f.bdeSize = rspsize;
2629         wqe->xmit_sequence.bde.addrLow = le32_to_cpu(putPaddrLow(rspbuf));
2630         wqe->xmit_sequence.bde.addrHigh = le32_to_cpu(putPaddrHigh(rspbuf));
2631
2632         /* Word 3 */
2633
2634         /* Word 4 */
2635
2636         /* Word 5 */
2637         bf_set(wqe_dfctl, &wqe->xmit_sequence.wge_ctl, 0);
2638         bf_set(wqe_ls, &wqe->xmit_sequence.wge_ctl, 1);
2639         bf_set(wqe_la, &wqe->xmit_sequence.wge_ctl, 0);
2640         bf_set(wqe_rctl, &wqe->xmit_sequence.wge_ctl, FC_RCTL_ELS4_REP);
2641         bf_set(wqe_type, &wqe->xmit_sequence.wge_ctl, FC_TYPE_NVME);
2642
2643         /* Word 6 */
2644         bf_set(wqe_ctxt_tag, &wqe->xmit_sequence.wqe_com,
2645                phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2646         bf_set(wqe_xri_tag, &wqe->xmit_sequence.wqe_com, nvmewqe->sli4_xritag);
2647
2648         /* Word 7 */
2649         bf_set(wqe_cmnd, &wqe->xmit_sequence.wqe_com,
2650                CMD_XMIT_SEQUENCE64_WQE);
2651         bf_set(wqe_ct, &wqe->xmit_sequence.wqe_com, SLI4_CT_RPI);
2652         bf_set(wqe_class, &wqe->xmit_sequence.wqe_com, CLASS3);
2653         bf_set(wqe_pu, &wqe->xmit_sequence.wqe_com, 0);
2654
2655         /* Word 8 */
2656         wqe->xmit_sequence.wqe_com.abort_tag = nvmewqe->iotag;
2657
2658         /* Word 9 */
2659         bf_set(wqe_reqtag, &wqe->xmit_sequence.wqe_com, nvmewqe->iotag);
2660         /* Needs to be set by caller */
2661         bf_set(wqe_rcvoxid, &wqe->xmit_sequence.wqe_com, ctxp->oxid);
2662
2663         /* Word 10 */
2664         bf_set(wqe_dbde, &wqe->xmit_sequence.wqe_com, 1);
2665         bf_set(wqe_iod, &wqe->xmit_sequence.wqe_com, LPFC_WQE_IOD_WRITE);
2666         bf_set(wqe_lenloc, &wqe->xmit_sequence.wqe_com,
2667                LPFC_WQE_LENLOC_WORD12);
2668         bf_set(wqe_ebde_cnt, &wqe->xmit_sequence.wqe_com, 0);
2669
2670         /* Word 11 */
2671         bf_set(wqe_cqid, &wqe->xmit_sequence.wqe_com,
2672                LPFC_WQE_CQ_ID_DEFAULT);
2673         bf_set(wqe_cmd_type, &wqe->xmit_sequence.wqe_com,
2674                OTHER_COMMAND);
2675
2676         /* Word 12 */
2677         wqe->xmit_sequence.xmit_len = rspsize;
2678
2679         nvmewqe->retry = 1;
2680         nvmewqe->vport = phba->pport;
2681         nvmewqe->drvrTimeout = (phba->fc_ratov * 3) + LPFC_DRVR_TIMEOUT;
2682         nvmewqe->cmd_flag |= LPFC_IO_NVME_LS;
2683
2684         /* Xmit NVMET response to remote NPORT <did> */
2685         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
2686                         "6039 Xmit NVMET LS response to remote "
2687                         "NPORT x%x iotag:x%x oxid:x%x size:x%x\n",
2688                         ndlp->nlp_DID, nvmewqe->iotag, ctxp->oxid,
2689                         rspsize);
2690         return nvmewqe;
2691
2692 nvme_wqe_free_wqeq_exit:
2693         nvmewqe->context_un.axchg = NULL;
2694         nvmewqe->ndlp = NULL;
2695         nvmewqe->bpl_dmabuf = NULL;
2696         lpfc_sli_release_iocbq(phba, nvmewqe);
2697         return NULL;
2698 }
2699
2700
2701 static struct lpfc_iocbq *
2702 lpfc_nvmet_prep_fcp_wqe(struct lpfc_hba *phba,
2703                         struct lpfc_async_xchg_ctx *ctxp)
2704 {
2705         struct nvmefc_tgt_fcp_req *rsp = &ctxp->hdlrctx.fcp_req;
2706         struct lpfc_nvmet_tgtport *tgtp;
2707         struct sli4_sge *sgl;
2708         struct lpfc_nodelist *ndlp;
2709         struct lpfc_iocbq *nvmewqe;
2710         struct scatterlist *sgel;
2711         union lpfc_wqe128 *wqe;
2712         struct ulp_bde64 *bde;
2713         dma_addr_t physaddr;
2714         int i, cnt, nsegs;
2715         bool use_pbde = false;
2716         int xc = 1;
2717
2718         if (!lpfc_is_link_up(phba)) {
2719                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2720                                 "6107 NVMET prep FCP wqe: link err:"
2721                                 "NPORT x%x oxid x%x ste %d\n",
2722                                 ctxp->sid, ctxp->oxid, ctxp->state);
2723                 return NULL;
2724         }
2725
2726         ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
2727         if (!ndlp ||
2728             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
2729              (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
2730                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2731                                 "6108 NVMET prep FCP wqe: no ndlp: "
2732                                 "NPORT x%x oxid x%x ste %d\n",
2733                                 ctxp->sid, ctxp->oxid, ctxp->state);
2734                 return NULL;
2735         }
2736
2737         if (rsp->sg_cnt > lpfc_tgttemplate.max_sgl_segments) {
2738                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2739                                 "6109 NVMET prep FCP wqe: seg cnt err: "
2740                                 "NPORT x%x oxid x%x ste %d cnt %d\n",
2741                                 ctxp->sid, ctxp->oxid, ctxp->state,
2742                                 phba->cfg_nvme_seg_cnt);
2743                 return NULL;
2744         }
2745         nsegs = rsp->sg_cnt;
2746
2747         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2748         nvmewqe = ctxp->wqeq;
2749         if (nvmewqe == NULL) {
2750                 /* Allocate buffer for  command wqe */
2751                 nvmewqe = ctxp->ctxbuf->iocbq;
2752                 if (nvmewqe == NULL) {
2753                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2754                                         "6110 NVMET prep FCP wqe: No "
2755                                         "WQE: NPORT x%x oxid x%x ste %d\n",
2756                                         ctxp->sid, ctxp->oxid, ctxp->state);
2757                         return NULL;
2758                 }
2759                 ctxp->wqeq = nvmewqe;
2760                 xc = 0; /* create new XRI */
2761                 nvmewqe->sli4_lxritag = NO_XRI;
2762                 nvmewqe->sli4_xritag = NO_XRI;
2763         }
2764
2765         /* Sanity check */
2766         if (((ctxp->state == LPFC_NVME_STE_RCV) &&
2767             (ctxp->entry_cnt == 1)) ||
2768             (ctxp->state == LPFC_NVME_STE_DATA)) {
2769                 wqe = &nvmewqe->wqe;
2770         } else {
2771                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2772                                 "6111 Wrong state NVMET FCP: %d  cnt %d\n",
2773                                 ctxp->state, ctxp->entry_cnt);
2774                 return NULL;
2775         }
2776
2777         sgl  = (struct sli4_sge *)ctxp->ctxbuf->sglq->sgl;
2778         switch (rsp->op) {
2779         case NVMET_FCOP_READDATA:
2780         case NVMET_FCOP_READDATA_RSP:
2781                 /* From the tsend template, initialize words 7 - 11 */
2782                 memcpy(&wqe->words[7],
2783                        &lpfc_tsend_cmd_template.words[7],
2784                        sizeof(uint32_t) * 5);
2785
2786                 /* Words 0 - 2 : The first sg segment */
2787                 sgel = &rsp->sg[0];
2788                 physaddr = sg_dma_address(sgel);
2789                 wqe->fcp_tsend.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2790                 wqe->fcp_tsend.bde.tus.f.bdeSize = sg_dma_len(sgel);
2791                 wqe->fcp_tsend.bde.addrLow = cpu_to_le32(putPaddrLow(physaddr));
2792                 wqe->fcp_tsend.bde.addrHigh =
2793                         cpu_to_le32(putPaddrHigh(physaddr));
2794
2795                 /* Word 3 */
2796                 wqe->fcp_tsend.payload_offset_len = 0;
2797
2798                 /* Word 4 */
2799                 wqe->fcp_tsend.relative_offset = ctxp->offset;
2800
2801                 /* Word 5 */
2802                 wqe->fcp_tsend.reserved = 0;
2803
2804                 /* Word 6 */
2805                 bf_set(wqe_ctxt_tag, &wqe->fcp_tsend.wqe_com,
2806                        phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2807                 bf_set(wqe_xri_tag, &wqe->fcp_tsend.wqe_com,
2808                        nvmewqe->sli4_xritag);
2809
2810                 /* Word 7 - set ar later */
2811
2812                 /* Word 8 */
2813                 wqe->fcp_tsend.wqe_com.abort_tag = nvmewqe->iotag;
2814
2815                 /* Word 9 */
2816                 bf_set(wqe_reqtag, &wqe->fcp_tsend.wqe_com, nvmewqe->iotag);
2817                 bf_set(wqe_rcvoxid, &wqe->fcp_tsend.wqe_com, ctxp->oxid);
2818
2819                 /* Word 10 - set wqes later, in template xc=1 */
2820                 if (!xc)
2821                         bf_set(wqe_xc, &wqe->fcp_tsend.wqe_com, 0);
2822
2823                 /* Word 12 */
2824                 wqe->fcp_tsend.fcp_data_len = rsp->transfer_length;
2825
2826                 /* Setup 2 SKIP SGEs */
2827                 sgl->addr_hi = 0;
2828                 sgl->addr_lo = 0;
2829                 sgl->word2 = 0;
2830                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2831                 sgl->word2 = cpu_to_le32(sgl->word2);
2832                 sgl->sge_len = 0;
2833                 sgl++;
2834                 sgl->addr_hi = 0;
2835                 sgl->addr_lo = 0;
2836                 sgl->word2 = 0;
2837                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2838                 sgl->word2 = cpu_to_le32(sgl->word2);
2839                 sgl->sge_len = 0;
2840                 sgl++;
2841                 if (rsp->op == NVMET_FCOP_READDATA_RSP) {
2842                         atomic_inc(&tgtp->xmt_fcp_read_rsp);
2843
2844                         /* In template ar=1 wqes=0 sup=0 irsp=0 irsplen=0 */
2845
2846                         if (rsp->rsplen == LPFC_NVMET_SUCCESS_LEN) {
2847                                 if (ndlp->nlp_flag & NLP_SUPPRESS_RSP)
2848                                         bf_set(wqe_sup,
2849                                                &wqe->fcp_tsend.wqe_com, 1);
2850                         } else {
2851                                 bf_set(wqe_wqes, &wqe->fcp_tsend.wqe_com, 1);
2852                                 bf_set(wqe_irsp, &wqe->fcp_tsend.wqe_com, 1);
2853                                 bf_set(wqe_irsplen, &wqe->fcp_tsend.wqe_com,
2854                                        ((rsp->rsplen >> 2) - 1));
2855                                 memcpy(&wqe->words[16], rsp->rspaddr,
2856                                        rsp->rsplen);
2857                         }
2858                 } else {
2859                         atomic_inc(&tgtp->xmt_fcp_read);
2860
2861                         /* In template ar=1 wqes=0 sup=0 irsp=0 irsplen=0 */
2862                         bf_set(wqe_ar, &wqe->fcp_tsend.wqe_com, 0);
2863                 }
2864                 break;
2865
2866         case NVMET_FCOP_WRITEDATA:
2867                 /* From the treceive template, initialize words 3 - 11 */
2868                 memcpy(&wqe->words[3],
2869                        &lpfc_treceive_cmd_template.words[3],
2870                        sizeof(uint32_t) * 9);
2871
2872                 /* Words 0 - 2 : First SGE is skipped, set invalid BDE type */
2873                 wqe->fcp_treceive.bde.tus.f.bdeFlags = LPFC_SGE_TYPE_SKIP;
2874                 wqe->fcp_treceive.bde.tus.f.bdeSize = 0;
2875                 wqe->fcp_treceive.bde.addrLow = 0;
2876                 wqe->fcp_treceive.bde.addrHigh = 0;
2877
2878                 /* Word 4 */
2879                 wqe->fcp_treceive.relative_offset = ctxp->offset;
2880
2881                 /* Word 6 */
2882                 bf_set(wqe_ctxt_tag, &wqe->fcp_treceive.wqe_com,
2883                        phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2884                 bf_set(wqe_xri_tag, &wqe->fcp_treceive.wqe_com,
2885                        nvmewqe->sli4_xritag);
2886
2887                 /* Word 7 */
2888
2889                 /* Word 8 */
2890                 wqe->fcp_treceive.wqe_com.abort_tag = nvmewqe->iotag;
2891
2892                 /* Word 9 */
2893                 bf_set(wqe_reqtag, &wqe->fcp_treceive.wqe_com, nvmewqe->iotag);
2894                 bf_set(wqe_rcvoxid, &wqe->fcp_treceive.wqe_com, ctxp->oxid);
2895
2896                 /* Word 10 - in template xc=1 */
2897                 if (!xc)
2898                         bf_set(wqe_xc, &wqe->fcp_treceive.wqe_com, 0);
2899
2900                 /* Word 11 - check for pbde */
2901                 if (nsegs == 1 && phba->cfg_enable_pbde) {
2902                         use_pbde = true;
2903                         /* Word 11 - PBDE bit already preset by template */
2904                 } else {
2905                         /* Overwrite default template setting */
2906                         bf_set(wqe_pbde, &wqe->fcp_treceive.wqe_com, 0);
2907                 }
2908
2909                 /* Word 12 */
2910                 wqe->fcp_tsend.fcp_data_len = rsp->transfer_length;
2911
2912                 /* Setup 2 SKIP SGEs */
2913                 sgl->addr_hi = 0;
2914                 sgl->addr_lo = 0;
2915                 sgl->word2 = 0;
2916                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2917                 sgl->word2 = cpu_to_le32(sgl->word2);
2918                 sgl->sge_len = 0;
2919                 sgl++;
2920                 sgl->addr_hi = 0;
2921                 sgl->addr_lo = 0;
2922                 sgl->word2 = 0;
2923                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2924                 sgl->word2 = cpu_to_le32(sgl->word2);
2925                 sgl->sge_len = 0;
2926                 sgl++;
2927                 atomic_inc(&tgtp->xmt_fcp_write);
2928                 break;
2929
2930         case NVMET_FCOP_RSP:
2931                 /* From the treceive template, initialize words 4 - 11 */
2932                 memcpy(&wqe->words[4],
2933                        &lpfc_trsp_cmd_template.words[4],
2934                        sizeof(uint32_t) * 8);
2935
2936                 /* Words 0 - 2 */
2937                 physaddr = rsp->rspdma;
2938                 wqe->fcp_trsp.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2939                 wqe->fcp_trsp.bde.tus.f.bdeSize = rsp->rsplen;
2940                 wqe->fcp_trsp.bde.addrLow =
2941                         cpu_to_le32(putPaddrLow(physaddr));
2942                 wqe->fcp_trsp.bde.addrHigh =
2943                         cpu_to_le32(putPaddrHigh(physaddr));
2944
2945                 /* Word 3 */
2946                 wqe->fcp_trsp.response_len = rsp->rsplen;
2947
2948                 /* Word 6 */
2949                 bf_set(wqe_ctxt_tag, &wqe->fcp_trsp.wqe_com,
2950                        phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2951                 bf_set(wqe_xri_tag, &wqe->fcp_trsp.wqe_com,
2952                        nvmewqe->sli4_xritag);
2953
2954                 /* Word 7 */
2955
2956                 /* Word 8 */
2957                 wqe->fcp_trsp.wqe_com.abort_tag = nvmewqe->iotag;
2958
2959                 /* Word 9 */
2960                 bf_set(wqe_reqtag, &wqe->fcp_trsp.wqe_com, nvmewqe->iotag);
2961                 bf_set(wqe_rcvoxid, &wqe->fcp_trsp.wqe_com, ctxp->oxid);
2962
2963                 /* Word 10 */
2964                 if (xc)
2965                         bf_set(wqe_xc, &wqe->fcp_trsp.wqe_com, 1);
2966
2967                 /* Word 11 */
2968                 /* In template wqes=0 irsp=0 irsplen=0 - good response */
2969                 if (rsp->rsplen != LPFC_NVMET_SUCCESS_LEN) {
2970                         /* Bad response - embed it */
2971                         bf_set(wqe_wqes, &wqe->fcp_trsp.wqe_com, 1);
2972                         bf_set(wqe_irsp, &wqe->fcp_trsp.wqe_com, 1);
2973                         bf_set(wqe_irsplen, &wqe->fcp_trsp.wqe_com,
2974                                ((rsp->rsplen >> 2) - 1));
2975                         memcpy(&wqe->words[16], rsp->rspaddr, rsp->rsplen);
2976                 }
2977
2978                 /* Word 12 */
2979                 wqe->fcp_trsp.rsvd_12_15[0] = 0;
2980
2981                 /* Use rspbuf, NOT sg list */
2982                 nsegs = 0;
2983                 sgl->word2 = 0;
2984                 atomic_inc(&tgtp->xmt_fcp_rsp);
2985                 break;
2986
2987         default:
2988                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
2989                                 "6064 Unknown Rsp Op %d\n",
2990                                 rsp->op);
2991                 return NULL;
2992         }
2993
2994         nvmewqe->retry = 1;
2995         nvmewqe->vport = phba->pport;
2996         nvmewqe->drvrTimeout = (phba->fc_ratov * 3) + LPFC_DRVR_TIMEOUT;
2997         nvmewqe->ndlp = ndlp;
2998
2999         for_each_sg(rsp->sg, sgel, nsegs, i) {
3000                 physaddr = sg_dma_address(sgel);
3001                 cnt = sg_dma_len(sgel);
3002                 sgl->addr_hi = putPaddrHigh(physaddr);
3003                 sgl->addr_lo = putPaddrLow(physaddr);
3004                 sgl->word2 = 0;
3005                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
3006                 bf_set(lpfc_sli4_sge_offset, sgl, ctxp->offset);
3007                 if ((i+1) == rsp->sg_cnt)
3008                         bf_set(lpfc_sli4_sge_last, sgl, 1);
3009                 sgl->word2 = cpu_to_le32(sgl->word2);
3010                 sgl->sge_len = cpu_to_le32(cnt);
3011                 sgl++;
3012                 ctxp->offset += cnt;
3013         }
3014
3015         bde = (struct ulp_bde64 *)&wqe->words[13];
3016         if (use_pbde) {
3017                 /* decrement sgl ptr backwards once to first data sge */
3018                 sgl--;
3019
3020                 /* Words 13-15 (PBDE) */
3021                 bde->addrLow = sgl->addr_lo;
3022                 bde->addrHigh = sgl->addr_hi;
3023                 bde->tus.f.bdeSize = le32_to_cpu(sgl->sge_len);
3024                 bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
3025                 bde->tus.w = cpu_to_le32(bde->tus.w);
3026         } else {
3027                 memset(bde, 0, sizeof(struct ulp_bde64));
3028         }
3029         ctxp->state = LPFC_NVME_STE_DATA;
3030         ctxp->entry_cnt++;
3031         return nvmewqe;
3032 }
3033
3034 /**
3035  * lpfc_nvmet_sol_fcp_abort_cmp - Completion handler for ABTS
3036  * @phba: Pointer to HBA context object.
3037  * @cmdwqe: Pointer to driver command WQE object.
3038  * @rspwqe: Pointer to driver response WQE object.
3039  *
3040  * The function is called from SLI ring event handler with no
3041  * lock held. This function is the completion handler for NVME ABTS for FCP cmds
3042  * The function frees memory resources used for the NVME commands.
3043  **/
3044 static void
3045 lpfc_nvmet_sol_fcp_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3046                              struct lpfc_iocbq *rspwqe)
3047 {
3048         struct lpfc_async_xchg_ctx *ctxp;
3049         struct lpfc_nvmet_tgtport *tgtp;
3050         uint32_t result;
3051         unsigned long flags;
3052         bool released = false;
3053         struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
3054
3055         ctxp = cmdwqe->context_un.axchg;
3056         result = wcqe->parameter;
3057
3058         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3059         if (ctxp->flag & LPFC_NVME_ABORT_OP)
3060                 atomic_inc(&tgtp->xmt_fcp_abort_cmpl);
3061
3062         spin_lock_irqsave(&ctxp->ctxlock, flags);
3063         ctxp->state = LPFC_NVME_STE_DONE;
3064
3065         /* Check if we already received a free context call
3066          * and we have completed processing an abort situation.
3067          */
3068         if ((ctxp->flag & LPFC_NVME_CTX_RLS) &&
3069             !(ctxp->flag & LPFC_NVME_XBUSY)) {
3070                 spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3071                 list_del_init(&ctxp->list);
3072                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3073                 released = true;
3074         }
3075         ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3076         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3077         atomic_inc(&tgtp->xmt_abort_rsp);
3078
3079         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3080                         "6165 ABORT cmpl: oxid x%x flg x%x (%d) "
3081                         "WCQE: %08x %08x %08x %08x\n",
3082                         ctxp->oxid, ctxp->flag, released,
3083                         wcqe->word0, wcqe->total_data_placed,
3084                         result, wcqe->word3);
3085
3086         cmdwqe->rsp_dmabuf = NULL;
3087         cmdwqe->bpl_dmabuf = NULL;
3088         /*
3089          * if transport has released ctx, then can reuse it. Otherwise,
3090          * will be recycled by transport release call.
3091          */
3092         if (released)
3093                 lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
3094
3095         /* This is the iocbq for the abort, not the command */
3096         lpfc_sli_release_iocbq(phba, cmdwqe);
3097
3098         /* Since iaab/iaar are NOT set, there is no work left.
3099          * For LPFC_NVME_XBUSY, lpfc_sli4_nvmet_xri_aborted
3100          * should have been called already.
3101          */
3102 }
3103
3104 /**
3105  * lpfc_nvmet_unsol_fcp_abort_cmp - Completion handler for ABTS
3106  * @phba: Pointer to HBA context object.
3107  * @cmdwqe: Pointer to driver command WQE object.
3108  * @rspwqe: Pointer to driver response WQE object.
3109  *
3110  * The function is called from SLI ring event handler with no
3111  * lock held. This function is the completion handler for NVME ABTS for FCP cmds
3112  * The function frees memory resources used for the NVME commands.
3113  **/
3114 static void
3115 lpfc_nvmet_unsol_fcp_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3116                                struct lpfc_iocbq *rspwqe)
3117 {
3118         struct lpfc_async_xchg_ctx *ctxp;
3119         struct lpfc_nvmet_tgtport *tgtp;
3120         unsigned long flags;
3121         uint32_t result;
3122         bool released = false;
3123         struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
3124
3125         ctxp = cmdwqe->context_un.axchg;
3126         result = wcqe->parameter;
3127
3128         if (!ctxp) {
3129                 /* if context is clear, related io alrady complete */
3130                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3131                                 "6070 ABTS cmpl: WCQE: %08x %08x %08x %08x\n",
3132                                 wcqe->word0, wcqe->total_data_placed,
3133                                 result, wcqe->word3);
3134                 return;
3135         }
3136
3137         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3138         spin_lock_irqsave(&ctxp->ctxlock, flags);
3139         if (ctxp->flag & LPFC_NVME_ABORT_OP)
3140                 atomic_inc(&tgtp->xmt_fcp_abort_cmpl);
3141
3142         /* Sanity check */
3143         if (ctxp->state != LPFC_NVME_STE_ABORT) {
3144                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3145                                 "6112 ABTS Wrong state:%d oxid x%x\n",
3146                                 ctxp->state, ctxp->oxid);
3147         }
3148
3149         /* Check if we already received a free context call
3150          * and we have completed processing an abort situation.
3151          */
3152         ctxp->state = LPFC_NVME_STE_DONE;
3153         if ((ctxp->flag & LPFC_NVME_CTX_RLS) &&
3154             !(ctxp->flag & LPFC_NVME_XBUSY)) {
3155                 spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3156                 list_del_init(&ctxp->list);
3157                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3158                 released = true;
3159         }
3160         ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3161         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3162         atomic_inc(&tgtp->xmt_abort_rsp);
3163
3164         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3165                         "6316 ABTS cmpl oxid x%x flg x%x (%x) "
3166                         "WCQE: %08x %08x %08x %08x\n",
3167                         ctxp->oxid, ctxp->flag, released,
3168                         wcqe->word0, wcqe->total_data_placed,
3169                         result, wcqe->word3);
3170
3171         cmdwqe->rsp_dmabuf = NULL;
3172         cmdwqe->bpl_dmabuf = NULL;
3173         /*
3174          * if transport has released ctx, then can reuse it. Otherwise,
3175          * will be recycled by transport release call.
3176          */
3177         if (released)
3178                 lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
3179
3180         /* Since iaab/iaar are NOT set, there is no work left.
3181          * For LPFC_NVME_XBUSY, lpfc_sli4_nvmet_xri_aborted
3182          * should have been called already.
3183          */
3184 }
3185
3186 /**
3187  * lpfc_nvmet_xmt_ls_abort_cmp - Completion handler for ABTS
3188  * @phba: Pointer to HBA context object.
3189  * @cmdwqe: Pointer to driver command WQE object.
3190  * @rspwqe: Pointer to driver response WQE object.
3191  *
3192  * The function is called from SLI ring event handler with no
3193  * lock held. This function is the completion handler for NVME ABTS for LS cmds
3194  * The function frees memory resources used for the NVME commands.
3195  **/
3196 static void
3197 lpfc_nvmet_xmt_ls_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3198                             struct lpfc_iocbq *rspwqe)
3199 {
3200         struct lpfc_async_xchg_ctx *ctxp;
3201         struct lpfc_nvmet_tgtport *tgtp;
3202         uint32_t result;
3203         struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
3204
3205         ctxp = cmdwqe->context_un.axchg;
3206         result = wcqe->parameter;
3207
3208         if (phba->nvmet_support) {
3209                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3210                 atomic_inc(&tgtp->xmt_ls_abort_cmpl);
3211         }
3212
3213         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3214                         "6083 Abort cmpl: ctx x%px WCQE:%08x %08x %08x %08x\n",
3215                         ctxp, wcqe->word0, wcqe->total_data_placed,
3216                         result, wcqe->word3);
3217
3218         if (!ctxp) {
3219                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3220                                 "6415 NVMET LS Abort No ctx: WCQE: "
3221                                  "%08x %08x %08x %08x\n",
3222                                 wcqe->word0, wcqe->total_data_placed,
3223                                 result, wcqe->word3);
3224
3225                 lpfc_sli_release_iocbq(phba, cmdwqe);
3226                 return;
3227         }
3228
3229         if (ctxp->state != LPFC_NVME_STE_LS_ABORT) {
3230                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3231                                 "6416 NVMET LS abort cmpl state mismatch: "
3232                                 "oxid x%x: %d %d\n",
3233                                 ctxp->oxid, ctxp->state, ctxp->entry_cnt);
3234         }
3235
3236         cmdwqe->rsp_dmabuf = NULL;
3237         cmdwqe->bpl_dmabuf = NULL;
3238         lpfc_sli_release_iocbq(phba, cmdwqe);
3239         kfree(ctxp);
3240 }
3241
3242 static int
3243 lpfc_nvmet_unsol_issue_abort(struct lpfc_hba *phba,
3244                              struct lpfc_async_xchg_ctx *ctxp,
3245                              uint32_t sid, uint16_t xri)
3246 {
3247         struct lpfc_nvmet_tgtport *tgtp = NULL;
3248         struct lpfc_iocbq *abts_wqeq;
3249         union lpfc_wqe128 *wqe_abts;
3250         struct lpfc_nodelist *ndlp;
3251
3252         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3253                         "6067 ABTS: sid %x xri x%x/x%x\n",
3254                         sid, xri, ctxp->wqeq->sli4_xritag);
3255
3256         if (phba->nvmet_support && phba->targetport)
3257                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3258
3259         ndlp = lpfc_findnode_did(phba->pport, sid);
3260         if (!ndlp ||
3261             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
3262             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
3263                 if (tgtp)
3264                         atomic_inc(&tgtp->xmt_abort_rsp_error);
3265                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3266                                 "6134 Drop ABTS - wrong NDLP state x%x.\n",
3267                                 (ndlp) ? ndlp->nlp_state : NLP_STE_MAX_STATE);
3268
3269                 /* No failure to an ABTS request. */
3270                 return 0;
3271         }
3272
3273         abts_wqeq = ctxp->wqeq;
3274         wqe_abts = &abts_wqeq->wqe;
3275
3276         /*
3277          * Since we zero the whole WQE, we need to ensure we set the WQE fields
3278          * that were initialized in lpfc_sli4_nvmet_alloc.
3279          */
3280         memset(wqe_abts, 0, sizeof(union lpfc_wqe));
3281
3282         /* Word 5 */
3283         bf_set(wqe_dfctl, &wqe_abts->xmit_sequence.wge_ctl, 0);
3284         bf_set(wqe_ls, &wqe_abts->xmit_sequence.wge_ctl, 1);
3285         bf_set(wqe_la, &wqe_abts->xmit_sequence.wge_ctl, 0);
3286         bf_set(wqe_rctl, &wqe_abts->xmit_sequence.wge_ctl, FC_RCTL_BA_ABTS);
3287         bf_set(wqe_type, &wqe_abts->xmit_sequence.wge_ctl, FC_TYPE_BLS);
3288
3289         /* Word 6 */
3290         bf_set(wqe_ctxt_tag, &wqe_abts->xmit_sequence.wqe_com,
3291                phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
3292         bf_set(wqe_xri_tag, &wqe_abts->xmit_sequence.wqe_com,
3293                abts_wqeq->sli4_xritag);
3294
3295         /* Word 7 */
3296         bf_set(wqe_cmnd, &wqe_abts->xmit_sequence.wqe_com,
3297                CMD_XMIT_SEQUENCE64_WQE);
3298         bf_set(wqe_ct, &wqe_abts->xmit_sequence.wqe_com, SLI4_CT_RPI);
3299         bf_set(wqe_class, &wqe_abts->xmit_sequence.wqe_com, CLASS3);
3300         bf_set(wqe_pu, &wqe_abts->xmit_sequence.wqe_com, 0);
3301
3302         /* Word 8 */
3303         wqe_abts->xmit_sequence.wqe_com.abort_tag = abts_wqeq->iotag;
3304
3305         /* Word 9 */
3306         bf_set(wqe_reqtag, &wqe_abts->xmit_sequence.wqe_com, abts_wqeq->iotag);
3307         /* Needs to be set by caller */
3308         bf_set(wqe_rcvoxid, &wqe_abts->xmit_sequence.wqe_com, xri);
3309
3310         /* Word 10 */
3311         bf_set(wqe_iod, &wqe_abts->xmit_sequence.wqe_com, LPFC_WQE_IOD_WRITE);
3312         bf_set(wqe_lenloc, &wqe_abts->xmit_sequence.wqe_com,
3313                LPFC_WQE_LENLOC_WORD12);
3314         bf_set(wqe_ebde_cnt, &wqe_abts->xmit_sequence.wqe_com, 0);
3315         bf_set(wqe_qosd, &wqe_abts->xmit_sequence.wqe_com, 0);
3316
3317         /* Word 11 */
3318         bf_set(wqe_cqid, &wqe_abts->xmit_sequence.wqe_com,
3319                LPFC_WQE_CQ_ID_DEFAULT);
3320         bf_set(wqe_cmd_type, &wqe_abts->xmit_sequence.wqe_com,
3321                OTHER_COMMAND);
3322
3323         abts_wqeq->vport = phba->pport;
3324         abts_wqeq->ndlp = ndlp;
3325         abts_wqeq->context_un.axchg = ctxp;
3326         abts_wqeq->bpl_dmabuf = NULL;
3327         abts_wqeq->num_bdes = 0;
3328         /* hba_wqidx should already be setup from command we are aborting */
3329         abts_wqeq->iocb.ulpCommand = CMD_XMIT_SEQUENCE64_CR;
3330         abts_wqeq->iocb.ulpLe = 1;
3331
3332         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3333                         "6069 Issue ABTS to xri x%x reqtag x%x\n",
3334                         xri, abts_wqeq->iotag);
3335         return 1;
3336 }
3337
3338 static int
3339 lpfc_nvmet_sol_fcp_issue_abort(struct lpfc_hba *phba,
3340                                struct lpfc_async_xchg_ctx *ctxp,
3341                                uint32_t sid, uint16_t xri)
3342 {
3343         struct lpfc_nvmet_tgtport *tgtp;
3344         struct lpfc_iocbq *abts_wqeq;
3345         struct lpfc_nodelist *ndlp;
3346         unsigned long flags;
3347         bool ia;
3348         int rc;
3349
3350         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3351         if (!ctxp->wqeq) {
3352                 ctxp->wqeq = ctxp->ctxbuf->iocbq;
3353                 ctxp->wqeq->hba_wqidx = 0;
3354         }
3355
3356         ndlp = lpfc_findnode_did(phba->pport, sid);
3357         if (!ndlp ||
3358             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
3359             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
3360                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3361                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3362                                 "6160 Drop ABORT - wrong NDLP state x%x.\n",
3363                                 (ndlp) ? ndlp->nlp_state : NLP_STE_MAX_STATE);
3364
3365                 /* No failure to an ABTS request. */
3366                 spin_lock_irqsave(&ctxp->ctxlock, flags);
3367                 ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3368                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3369                 return 0;
3370         }
3371
3372         /* Issue ABTS for this WQE based on iotag */
3373         ctxp->abort_wqeq = lpfc_sli_get_iocbq(phba);
3374         spin_lock_irqsave(&ctxp->ctxlock, flags);
3375         if (!ctxp->abort_wqeq) {
3376                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3377                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3378                                 "6161 ABORT failed: No wqeqs: "
3379                                 "xri: x%x\n", ctxp->oxid);
3380                 /* No failure to an ABTS request. */
3381                 ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3382                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3383                 return 0;
3384         }
3385         abts_wqeq = ctxp->abort_wqeq;
3386         ctxp->state = LPFC_NVME_STE_ABORT;
3387         ia = (ctxp->flag & LPFC_NVME_ABTS_RCV) ? true : false;
3388         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3389
3390         /* Announce entry to new IO submit field. */
3391         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3392                         "6162 ABORT Request to rport DID x%06x "
3393                         "for xri x%x x%x\n",
3394                         ctxp->sid, ctxp->oxid, ctxp->wqeq->sli4_xritag);
3395
3396         /* If the hba is getting reset, this flag is set.  It is
3397          * cleared when the reset is complete and rings reestablished.
3398          */
3399         spin_lock_irqsave(&phba->hbalock, flags);
3400         /* driver queued commands are in process of being flushed */
3401         if (phba->hba_flag & HBA_IOQ_FLUSH) {
3402                 spin_unlock_irqrestore(&phba->hbalock, flags);
3403                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3404                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3405                                 "6163 Driver in reset cleanup - flushing "
3406                                 "NVME Req now. hba_flag x%x oxid x%x\n",
3407                                 phba->hba_flag, ctxp->oxid);
3408                 lpfc_sli_release_iocbq(phba, abts_wqeq);
3409                 spin_lock_irqsave(&ctxp->ctxlock, flags);
3410                 ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3411                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3412                 return 0;
3413         }
3414
3415         /* Outstanding abort is in progress */
3416         if (abts_wqeq->cmd_flag & LPFC_DRIVER_ABORTED) {
3417                 spin_unlock_irqrestore(&phba->hbalock, flags);
3418                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3419                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3420                                 "6164 Outstanding NVME I/O Abort Request "
3421                                 "still pending on oxid x%x\n",
3422                                 ctxp->oxid);
3423                 lpfc_sli_release_iocbq(phba, abts_wqeq);
3424                 spin_lock_irqsave(&ctxp->ctxlock, flags);
3425                 ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3426                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3427                 return 0;
3428         }
3429
3430         /* Ready - mark outstanding as aborted by driver. */
3431         abts_wqeq->cmd_flag |= LPFC_DRIVER_ABORTED;
3432
3433         lpfc_sli_prep_abort_xri(phba, abts_wqeq, ctxp->wqeq->sli4_xritag,
3434                                 abts_wqeq->iotag, CLASS3,
3435                                 LPFC_WQE_CQ_ID_DEFAULT, ia, true);
3436
3437         /* ABTS WQE must go to the same WQ as the WQE to be aborted */
3438         abts_wqeq->hba_wqidx = ctxp->wqeq->hba_wqidx;
3439         abts_wqeq->cmd_cmpl = lpfc_nvmet_sol_fcp_abort_cmp;
3440         abts_wqeq->cmd_flag |= LPFC_IO_NVME;
3441         abts_wqeq->context_un.axchg = ctxp;
3442         abts_wqeq->vport = phba->pport;
3443         if (!ctxp->hdwq)
3444                 ctxp->hdwq = &phba->sli4_hba.hdwq[abts_wqeq->hba_wqidx];
3445
3446         rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, abts_wqeq);
3447         spin_unlock_irqrestore(&phba->hbalock, flags);
3448         if (rc == WQE_SUCCESS) {
3449                 atomic_inc(&tgtp->xmt_abort_sol);
3450                 return 0;
3451         }
3452
3453         atomic_inc(&tgtp->xmt_abort_rsp_error);
3454         spin_lock_irqsave(&ctxp->ctxlock, flags);
3455         ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3456         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3457         lpfc_sli_release_iocbq(phba, abts_wqeq);
3458         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3459                         "6166 Failed ABORT issue_wqe with status x%x "
3460                         "for oxid x%x.\n",
3461                         rc, ctxp->oxid);
3462         return 1;
3463 }
3464
3465 static int
3466 lpfc_nvmet_unsol_fcp_issue_abort(struct lpfc_hba *phba,
3467                                  struct lpfc_async_xchg_ctx *ctxp,
3468                                  uint32_t sid, uint16_t xri)
3469 {
3470         struct lpfc_nvmet_tgtport *tgtp;
3471         struct lpfc_iocbq *abts_wqeq;
3472         unsigned long flags;
3473         bool released = false;
3474         int rc;
3475
3476         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3477         if (!ctxp->wqeq) {
3478                 ctxp->wqeq = ctxp->ctxbuf->iocbq;
3479                 ctxp->wqeq->hba_wqidx = 0;
3480         }
3481
3482         if (ctxp->state == LPFC_NVME_STE_FREE) {
3483                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3484                                 "6417 NVMET ABORT ctx freed %d %d oxid x%x\n",
3485                                 ctxp->state, ctxp->entry_cnt, ctxp->oxid);
3486                 rc = WQE_BUSY;
3487                 goto aerr;
3488         }
3489         ctxp->state = LPFC_NVME_STE_ABORT;
3490         ctxp->entry_cnt++;
3491         rc = lpfc_nvmet_unsol_issue_abort(phba, ctxp, sid, xri);
3492         if (rc == 0)
3493                 goto aerr;
3494
3495         spin_lock_irqsave(&phba->hbalock, flags);
3496         abts_wqeq = ctxp->wqeq;
3497         abts_wqeq->cmd_cmpl = lpfc_nvmet_unsol_fcp_abort_cmp;
3498         abts_wqeq->cmd_flag |= LPFC_IO_NVMET;
3499         if (!ctxp->hdwq)
3500                 ctxp->hdwq = &phba->sli4_hba.hdwq[abts_wqeq->hba_wqidx];
3501
3502         rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, abts_wqeq);
3503         spin_unlock_irqrestore(&phba->hbalock, flags);
3504         if (rc == WQE_SUCCESS) {
3505                 return 0;
3506         }
3507
3508 aerr:
3509         spin_lock_irqsave(&ctxp->ctxlock, flags);
3510         if (ctxp->flag & LPFC_NVME_CTX_RLS) {
3511                 spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3512                 list_del_init(&ctxp->list);
3513                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3514                 released = true;
3515         }
3516         ctxp->flag &= ~(LPFC_NVME_ABORT_OP | LPFC_NVME_CTX_RLS);
3517         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3518
3519         atomic_inc(&tgtp->xmt_abort_rsp_error);
3520         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3521                         "6135 Failed to Issue ABTS for oxid x%x. Status x%x "
3522                         "(%x)\n",
3523                         ctxp->oxid, rc, released);
3524         if (released)
3525                 lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
3526         return 1;
3527 }
3528
3529 /**
3530  * lpfc_nvme_unsol_ls_issue_abort - issue ABTS on an exchange received
3531  *        via async frame receive where the frame is not handled.
3532  * @phba: pointer to adapter structure
3533  * @ctxp: pointer to the asynchronously received received sequence
3534  * @sid: address of the remote port to send the ABTS to
3535  * @xri: oxid value to for the ABTS (other side's exchange id).
3536  **/
3537 int
3538 lpfc_nvme_unsol_ls_issue_abort(struct lpfc_hba *phba,
3539                                 struct lpfc_async_xchg_ctx *ctxp,
3540                                 uint32_t sid, uint16_t xri)
3541 {
3542         struct lpfc_nvmet_tgtport *tgtp = NULL;
3543         struct lpfc_iocbq *abts_wqeq;
3544         unsigned long flags;
3545         int rc;
3546
3547         if ((ctxp->state == LPFC_NVME_STE_LS_RCV && ctxp->entry_cnt == 1) ||
3548             (ctxp->state == LPFC_NVME_STE_LS_RSP && ctxp->entry_cnt == 2)) {
3549                 ctxp->state = LPFC_NVME_STE_LS_ABORT;
3550                 ctxp->entry_cnt++;
3551         } else {
3552                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3553                                 "6418 NVMET LS abort state mismatch "
3554                                 "IO x%x: %d %d\n",
3555                                 ctxp->oxid, ctxp->state, ctxp->entry_cnt);
3556                 ctxp->state = LPFC_NVME_STE_LS_ABORT;
3557         }
3558
3559         if (phba->nvmet_support && phba->targetport)
3560                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3561
3562         if (!ctxp->wqeq) {
3563                 /* Issue ABTS for this WQE based on iotag */
3564                 ctxp->wqeq = lpfc_sli_get_iocbq(phba);
3565                 if (!ctxp->wqeq) {
3566                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3567                                         "6068 Abort failed: No wqeqs: "
3568                                         "xri: x%x\n", xri);
3569                         /* No failure to an ABTS request. */
3570                         kfree(ctxp);
3571                         return 0;
3572                 }
3573         }
3574         abts_wqeq = ctxp->wqeq;
3575
3576         if (lpfc_nvmet_unsol_issue_abort(phba, ctxp, sid, xri) == 0) {
3577                 rc = WQE_BUSY;
3578                 goto out;
3579         }
3580
3581         spin_lock_irqsave(&phba->hbalock, flags);
3582         abts_wqeq->cmd_cmpl = lpfc_nvmet_xmt_ls_abort_cmp;
3583         abts_wqeq->cmd_flag |=  LPFC_IO_NVME_LS;
3584         rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, abts_wqeq);
3585         spin_unlock_irqrestore(&phba->hbalock, flags);
3586         if (rc == WQE_SUCCESS) {
3587                 if (tgtp)
3588                         atomic_inc(&tgtp->xmt_abort_unsol);
3589                 return 0;
3590         }
3591 out:
3592         if (tgtp)
3593                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3594         abts_wqeq->rsp_dmabuf = NULL;
3595         abts_wqeq->bpl_dmabuf = NULL;
3596         lpfc_sli_release_iocbq(phba, abts_wqeq);
3597         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3598                         "6056 Failed to Issue ABTS. Status x%x\n", rc);
3599         return 1;
3600 }
3601
3602 /**
3603  * lpfc_nvmet_invalidate_host
3604  *
3605  * @phba: pointer to the driver instance bound to an adapter port.
3606  * @ndlp: pointer to an lpfc_nodelist type
3607  *
3608  * This routine upcalls the nvmet transport to invalidate an NVME
3609  * host to which this target instance had active connections.
3610  */
3611 void
3612 lpfc_nvmet_invalidate_host(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
3613 {
3614         u32 ndlp_has_hh;
3615         struct lpfc_nvmet_tgtport *tgtp;
3616
3617         lpfc_printf_log(phba, KERN_INFO,
3618                         LOG_NVME | LOG_NVME_ABTS | LOG_NVME_DISC,
3619                         "6203 Invalidating hosthandle x%px\n",
3620                         ndlp);
3621
3622         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3623         atomic_set(&tgtp->state, LPFC_NVMET_INV_HOST_ACTIVE);
3624
3625         spin_lock_irq(&ndlp->lock);
3626         ndlp_has_hh = ndlp->fc4_xpt_flags & NLP_XPT_HAS_HH;
3627         spin_unlock_irq(&ndlp->lock);
3628
3629         /* Do not invalidate any nodes that do not have a hosthandle.
3630          * The host_release callbk will cause a node reference
3631          * count imbalance and a crash.
3632          */
3633         if (!ndlp_has_hh) {
3634                 lpfc_printf_log(phba, KERN_INFO,
3635                                 LOG_NVME | LOG_NVME_ABTS | LOG_NVME_DISC,
3636                                 "6204 Skip invalidate on node x%px DID x%x\n",
3637                                 ndlp, ndlp->nlp_DID);
3638                 return;
3639         }
3640
3641 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
3642         /* Need to get the nvmet_fc_target_port pointer here.*/
3643         nvmet_fc_invalidate_host(phba->targetport, ndlp);
3644 #endif
3645 }