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) 2017-2023 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);
 304         result = wcqe->parameter;
 305
 306         if (axchg->state != LPFC_NVME_STE_LS_RSP || axchg->entry_cnt != 2) {
 307                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 308                                 "6410 NVMEx LS cmpl state mismatch IO x%x: "
 309                                 "%d %d\n",
 310                                 axchg->oxid, axchg->state, axchg->entry_cnt);
 311         }
 312
 313         lpfc_nvmeio_data(phba, "NVMEx LS  CMPL: xri x%x stat x%x result x%x\n",
 314                          axchg->oxid, status, result);
 315
 316         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
 317                         "6038 NVMEx LS rsp cmpl: %d %d oxid x%x\n",
 318                         status, result, axchg->oxid);
 319
 320         lpfc_nlp_put(cmdwqe->ndlp);
 321         cmdwqe->context_un.axchg = NULL;
 322         cmdwqe->bpl_dmabuf = NULL;
 323         lpfc_sli_release_iocbq(phba, cmdwqe);
 324         ls_rsp->done(ls_rsp);
 325         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
 326                         "6200 NVMEx LS rsp cmpl done status %d oxid x%x\n",
 327                         status, axchg->oxid);
 328         kfree(axchg);
 329 }
 330
 331 /**
 332  * lpfc_nvmet_xmt_ls_rsp_cmp - Completion handler for LS Response
 333  * @phba: Pointer to HBA context object.
 334  * @cmdwqe: Pointer to driver command WQE object.
 335  * @rspwqe: Pointer to driver response WQE object.
 336  *
 337  * The function is called from SLI ring event handler with no
 338  * lock held. This function is the completion handler for NVME LS commands
 339  * The function updates any states and statistics, then calls the
 340  * generic completion handler to free resources.
 341  **/
 342 static void
 343 lpfc_nvmet_xmt_ls_rsp_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
 344                           struct lpfc_iocbq *rspwqe)
 345 {
 346         struct lpfc_nvmet_tgtport *tgtp;
 347         uint32_t status, result;
 348         struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
 349
 350         if (!phba->targetport)
 351                 goto finish;
 352
 353         status = bf_get(lpfc_wcqe_c_status, wcqe);
 354         result = wcqe->parameter;
 355
 356         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
 357         if (tgtp) {
 358                 if (status) {
 359                         atomic_inc(&tgtp->xmt_ls_rsp_error);
 360                         if (result == IOERR_ABORT_REQUESTED)
 361                                 atomic_inc(&tgtp->xmt_ls_rsp_aborted);
 362                         if (bf_get(lpfc_wcqe_c_xb, wcqe))
 363                                 atomic_inc(&tgtp->xmt_ls_rsp_xb_set);
 364                 } else {
 365                         atomic_inc(&tgtp->xmt_ls_rsp_cmpl);
 366                 }
 367         }
 368
 369 finish:
 370         __lpfc_nvme_xmt_ls_rsp_cmp(phba, cmdwqe, rspwqe);
 371 }
 372
 373 /**
 374  * lpfc_nvmet_ctxbuf_post - Repost a NVMET RQ DMA buffer and clean up context
 375  * @phba: HBA buffer is associated with
 376  * @ctx_buf: ctx buffer context
 377  *
 378  * Description: Frees the given DMA buffer in the appropriate way given by
 379  * reposting it to its associated RQ so it can be reused.
 380  *
 381  * Notes: Takes phba->hbalock.  Can be called with or without other locks held.
 382  *
 383  * Returns: None
 384  **/
 385 void
 386 lpfc_nvmet_ctxbuf_post(struct lpfc_hba *phba, struct lpfc_nvmet_ctxbuf *ctx_buf)
 387 {
 388 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
 389         struct lpfc_async_xchg_ctx *ctxp = ctx_buf->context;
 390         struct lpfc_nvmet_tgtport *tgtp;
 391         struct fc_frame_header *fc_hdr;
 392         struct rqb_dmabuf *nvmebuf;
 393         struct lpfc_nvmet_ctx_info *infop;
 394         uint32_t size, oxid, sid;
 395         int cpu;
 396         unsigned long iflag;
 397
 398         if (ctxp->state == LPFC_NVME_STE_FREE) {
 399                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 400                                 "6411 NVMET free, already free IO x%x: %d %d\n",
 401                                 ctxp->oxid, ctxp->state, ctxp->entry_cnt);
 402         }
 403
 404         if (ctxp->rqb_buffer) {
 405                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
 406                 nvmebuf = ctxp->rqb_buffer;
 407                 /* check if freed in another path whilst acquiring lock */
 408                 if (nvmebuf) {
 409                         ctxp->rqb_buffer = NULL;
 410                         if (ctxp->flag & LPFC_NVME_CTX_REUSE_WQ) {
 411                                 ctxp->flag &= ~LPFC_NVME_CTX_REUSE_WQ;
 412                                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
 413                                 nvmebuf->hrq->rqbp->rqb_free_buffer(phba,
 414                                                                     nvmebuf);
 415                         } else {
 416                                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
 417                                 /* repost */
 418                                 lpfc_rq_buf_free(phba, &nvmebuf->hbuf);
 419                         }
 420                 } else {
 421                         spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
 422                 }
 423         }
 424         ctxp->state = LPFC_NVME_STE_FREE;
 425
 426         spin_lock_irqsave(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
 427         if (phba->sli4_hba.nvmet_io_wait_cnt) {
 428                 list_remove_head(&phba->sli4_hba.lpfc_nvmet_io_wait_list,
 429                                  nvmebuf, struct rqb_dmabuf,
 430                                  hbuf.list);
 431                 phba->sli4_hba.nvmet_io_wait_cnt--;
 432                 spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock,
 433                                        iflag);
 434
 435                 fc_hdr = (struct fc_frame_header *)(nvmebuf->hbuf.virt);
 436                 oxid = be16_to_cpu(fc_hdr->fh_ox_id);
 437                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
 438                 size = nvmebuf->bytes_recv;
 439                 sid = sli4_sid_from_fc_hdr(fc_hdr);
 440
 441                 ctxp = (struct lpfc_async_xchg_ctx *)ctx_buf->context;
 442                 ctxp->wqeq = NULL;
 443                 ctxp->offset = 0;
 444                 ctxp->phba = phba;
 445                 ctxp->size = size;
 446                 ctxp->oxid = oxid;
 447                 ctxp->sid = sid;
 448                 ctxp->state = LPFC_NVME_STE_RCV;
 449                 ctxp->entry_cnt = 1;
 450                 ctxp->flag = 0;
 451                 ctxp->ctxbuf = ctx_buf;
 452                 ctxp->rqb_buffer = (void *)nvmebuf;
 453                 spin_lock_init(&ctxp->ctxlock);
 454
 455 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 456                 /* NOTE: isr time stamp is stale when context is re-assigned*/
 457                 if (ctxp->ts_isr_cmd) {
 458                         ctxp->ts_cmd_nvme = 0;
 459                         ctxp->ts_nvme_data = 0;
 460                         ctxp->ts_data_wqput = 0;
 461                         ctxp->ts_isr_data = 0;
 462                         ctxp->ts_data_nvme = 0;
 463                         ctxp->ts_nvme_status = 0;
 464                         ctxp->ts_status_wqput = 0;
 465                         ctxp->ts_isr_status = 0;
 466                         ctxp->ts_status_nvme = 0;
 467                 }
 468 #endif
 469                 atomic_inc(&tgtp->rcv_fcp_cmd_in);
 470
 471                 /* Indicate that a replacement buffer has been posted */
 472                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
 473                 ctxp->flag |= LPFC_NVME_CTX_REUSE_WQ;
 474                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
 475
 476                 if (!queue_work(phba->wq, &ctx_buf->defer_work)) {
 477                         atomic_inc(&tgtp->rcv_fcp_cmd_drop);
 478                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 479                                         "6181 Unable to queue deferred work "
 480                                         "for oxid x%x. "
 481                                         "FCP Drop IO [x%x x%x x%x]\n",
 482                                         ctxp->oxid,
 483                                         atomic_read(&tgtp->rcv_fcp_cmd_in),
 484                                         atomic_read(&tgtp->rcv_fcp_cmd_out),
 485                                         atomic_read(&tgtp->xmt_fcp_release));
 486
 487                         spin_lock_irqsave(&ctxp->ctxlock, iflag);
 488                         lpfc_nvmet_defer_release(phba, ctxp);
 489                         spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
 490                         lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, sid, oxid);
 491                 }
 492                 return;
 493         }
 494         spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
 495
 496         /*
 497          * Use the CPU context list, from the MRQ the IO was received on
 498          * (ctxp->idx), to save context structure.
 499          */
 500         spin_lock_irqsave(&phba->sli4_hba.t_active_list_lock, iflag);
 501         list_del_init(&ctxp->list);
 502         spin_unlock_irqrestore(&phba->sli4_hba.t_active_list_lock, iflag);
 503         cpu = raw_smp_processor_id();
 504         infop = lpfc_get_ctx_list(phba, cpu, ctxp->idx);
 505         spin_lock_irqsave(&infop->nvmet_ctx_list_lock, iflag);
 506         list_add_tail(&ctx_buf->list, &infop->nvmet_ctx_list);
 507         infop->nvmet_ctx_list_cnt++;
 508         spin_unlock_irqrestore(&infop->nvmet_ctx_list_lock, iflag);
 509 #endif
 510 }
 511
 512 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 513 static void
 514 lpfc_nvmet_ktime(struct lpfc_hba *phba,
 515                  struct lpfc_async_xchg_ctx *ctxp)
 516 {
 517         uint64_t seg1, seg2, seg3, seg4, seg5;
 518         uint64_t seg6, seg7, seg8, seg9, seg10;
 519         uint64_t segsum;
 520
 521         if (!ctxp->ts_isr_cmd || !ctxp->ts_cmd_nvme ||
 522             !ctxp->ts_nvme_data || !ctxp->ts_data_wqput ||
 523             !ctxp->ts_isr_data || !ctxp->ts_data_nvme ||
 524             !ctxp->ts_nvme_status || !ctxp->ts_status_wqput ||
 525             !ctxp->ts_isr_status || !ctxp->ts_status_nvme)
 526                 return;
 527
 528         if (ctxp->ts_status_nvme < ctxp->ts_isr_cmd)
 529                 return;
 530         if (ctxp->ts_isr_cmd  > ctxp->ts_cmd_nvme)
 531                 return;
 532         if (ctxp->ts_cmd_nvme > ctxp->ts_nvme_data)
 533                 return;
 534         if (ctxp->ts_nvme_data > ctxp->ts_data_wqput)
 535                 return;
 536         if (ctxp->ts_data_wqput > ctxp->ts_isr_data)
 537                 return;
 538         if (ctxp->ts_isr_data > ctxp->ts_data_nvme)
 539                 return;
 540         if (ctxp->ts_data_nvme > ctxp->ts_nvme_status)
 541                 return;
 542         if (ctxp->ts_nvme_status > ctxp->ts_status_wqput)
 543                 return;
 544         if (ctxp->ts_status_wqput > ctxp->ts_isr_status)
 545                 return;
 546         if (ctxp->ts_isr_status > ctxp->ts_status_nvme)
 547                 return;
 548         /*
 549          * Segment 1 - Time from FCP command received by MSI-X ISR
 550          * to FCP command is passed to NVME Layer.
 551          * Segment 2 - Time from FCP command payload handed
 552          * off to NVME Layer to Driver receives a Command op
 553          * from NVME Layer.
 554          * Segment 3 - Time from Driver receives a Command op
 555          * from NVME Layer to Command is put on WQ.
 556          * Segment 4 - Time from Driver WQ put is done
 557          * to MSI-X ISR for Command cmpl.
 558          * Segment 5 - Time from MSI-X ISR for Command cmpl to
 559          * Command cmpl is passed to NVME Layer.
 560          * Segment 6 - Time from Command cmpl is passed to NVME
 561          * Layer to Driver receives a RSP op from NVME Layer.
 562          * Segment 7 - Time from Driver receives a RSP op from
 563          * NVME Layer to WQ put is done on TRSP FCP Status.
 564          * Segment 8 - Time from Driver WQ put is done on TRSP
 565          * FCP Status to MSI-X ISR for TRSP cmpl.
 566          * Segment 9 - Time from MSI-X ISR for TRSP cmpl to
 567          * TRSP cmpl is passed to NVME Layer.
 568          * Segment 10 - Time from FCP command received by
 569          * MSI-X ISR to command is completed on wire.
 570          * (Segments 1 thru 8) for READDATA / WRITEDATA
 571          * (Segments 1 thru 4) for READDATA_RSP
 572          */
 573         seg1 = ctxp->ts_cmd_nvme - ctxp->ts_isr_cmd;
 574         segsum = seg1;
 575
 576         seg2 = ctxp->ts_nvme_data - ctxp->ts_isr_cmd;
 577         if (segsum > seg2)
 578                 return;
 579         seg2 -= segsum;
 580         segsum += seg2;
 581
 582         seg3 = ctxp->ts_data_wqput - ctxp->ts_isr_cmd;
 583         if (segsum > seg3)
 584                 return;
 585         seg3 -= segsum;
 586         segsum += seg3;
 587
 588         seg4 = ctxp->ts_isr_data - ctxp->ts_isr_cmd;
 589         if (segsum > seg4)
 590                 return;
 591         seg4 -= segsum;
 592         segsum += seg4;
 593
 594         seg5 = ctxp->ts_data_nvme - ctxp->ts_isr_cmd;
 595         if (segsum > seg5)
 596                 return;
 597         seg5 -= segsum;
 598         segsum += seg5;
 599
 600
 601         /* For auto rsp commands seg6 thru seg10 will be 0 */
 602         if (ctxp->ts_nvme_status > ctxp->ts_data_nvme) {
 603                 seg6 = ctxp->ts_nvme_status - ctxp->ts_isr_cmd;
 604                 if (segsum > seg6)
 605                         return;
 606                 seg6 -= segsum;
 607                 segsum += seg6;
 608
 609                 seg7 = ctxp->ts_status_wqput - ctxp->ts_isr_cmd;
 610                 if (segsum > seg7)
 611                         return;
 612                 seg7 -= segsum;
 613                 segsum += seg7;
 614
 615                 seg8 = ctxp->ts_isr_status - ctxp->ts_isr_cmd;
 616                 if (segsum > seg8)
 617                         return;
 618                 seg8 -= segsum;
 619                 segsum += seg8;
 620
 621                 seg9 = ctxp->ts_status_nvme - ctxp->ts_isr_cmd;
 622                 if (segsum > seg9)
 623                         return;
 624                 seg9 -= segsum;
 625                 segsum += seg9;
 626
 627                 if (ctxp->ts_isr_status < ctxp->ts_isr_cmd)
 628                         return;
 629                 seg10 = (ctxp->ts_isr_status -
 630                         ctxp->ts_isr_cmd);
 631         } else {
 632                 if (ctxp->ts_isr_data < ctxp->ts_isr_cmd)
 633                         return;
 634                 seg6 =  0;
 635                 seg7 =  0;
 636                 seg8 =  0;
 637                 seg9 =  0;
 638                 seg10 = (ctxp->ts_isr_data - ctxp->ts_isr_cmd);
 639         }
 640
 641         phba->ktime_seg1_total += seg1;
 642         if (seg1 < phba->ktime_seg1_min)
 643                 phba->ktime_seg1_min = seg1;
 644         else if (seg1 > phba->ktime_seg1_max)
 645                 phba->ktime_seg1_max = seg1;
 646
 647         phba->ktime_seg2_total += seg2;
 648         if (seg2 < phba->ktime_seg2_min)
 649                 phba->ktime_seg2_min = seg2;
 650         else if (seg2 > phba->ktime_seg2_max)
 651                 phba->ktime_seg2_max = seg2;
 652
 653         phba->ktime_seg3_total += seg3;
 654         if (seg3 < phba->ktime_seg3_min)
 655                 phba->ktime_seg3_min = seg3;
 656         else if (seg3 > phba->ktime_seg3_max)
 657                 phba->ktime_seg3_max = seg3;
 658
 659         phba->ktime_seg4_total += seg4;
 660         if (seg4 < phba->ktime_seg4_min)
 661                 phba->ktime_seg4_min = seg4;
 662         else if (seg4 > phba->ktime_seg4_max)
 663                 phba->ktime_seg4_max = seg4;
 664
 665         phba->ktime_seg5_total += seg5;
 666         if (seg5 < phba->ktime_seg5_min)
 667                 phba->ktime_seg5_min = seg5;
 668         else if (seg5 > phba->ktime_seg5_max)
 669                 phba->ktime_seg5_max = seg5;
 670
 671         phba->ktime_data_samples++;
 672         if (!seg6)
 673                 goto out;
 674
 675         phba->ktime_seg6_total += seg6;
 676         if (seg6 < phba->ktime_seg6_min)
 677                 phba->ktime_seg6_min = seg6;
 678         else if (seg6 > phba->ktime_seg6_max)
 679                 phba->ktime_seg6_max = seg6;
 680
 681         phba->ktime_seg7_total += seg7;
 682         if (seg7 < phba->ktime_seg7_min)
 683                 phba->ktime_seg7_min = seg7;
 684         else if (seg7 > phba->ktime_seg7_max)
 685                 phba->ktime_seg7_max = seg7;
 686
 687         phba->ktime_seg8_total += seg8;
 688         if (seg8 < phba->ktime_seg8_min)
 689                 phba->ktime_seg8_min = seg8;
 690         else if (seg8 > phba->ktime_seg8_max)
 691                 phba->ktime_seg8_max = seg8;
 692
 693         phba->ktime_seg9_total += seg9;
 694         if (seg9 < phba->ktime_seg9_min)
 695                 phba->ktime_seg9_min = seg9;
 696         else if (seg9 > phba->ktime_seg9_max)
 697                 phba->ktime_seg9_max = seg9;
 698 out:
 699         phba->ktime_seg10_total += seg10;
 700         if (seg10 < phba->ktime_seg10_min)
 701                 phba->ktime_seg10_min = seg10;
 702         else if (seg10 > phba->ktime_seg10_max)
 703                 phba->ktime_seg10_max = seg10;
 704         phba->ktime_status_samples++;
 705 }
 706 #endif
 707
 708 /**
 709  * lpfc_nvmet_xmt_fcp_op_cmp - Completion handler for FCP Response
 710  * @phba: Pointer to HBA context object.
 711  * @cmdwqe: Pointer to driver command WQE object.
 712  * @rspwqe: Pointer to driver response WQE object.
 713  *
 714  * The function is called from SLI ring event handler with no
 715  * lock held. This function is the completion handler for NVME FCP commands
 716  * The function frees memory resources used for the NVME commands.
 717  **/
 718 static void
 719 lpfc_nvmet_xmt_fcp_op_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
 720                           struct lpfc_iocbq *rspwqe)
 721 {
 722         struct lpfc_nvmet_tgtport *tgtp;
 723         struct nvmefc_tgt_fcp_req *rsp;
 724         struct lpfc_async_xchg_ctx *ctxp;
 725         uint32_t status, result, op, logerr;
 726         struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
 727 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 728         int id;
 729 #endif
 730
 731         ctxp = cmdwqe->context_un.axchg;
 732         ctxp->flag &= ~LPFC_NVME_IO_INP;
 733
 734         rsp = &ctxp->hdlrctx.fcp_req;
 735         op = rsp->op;
 736
 737         status = bf_get(lpfc_wcqe_c_status, wcqe);
 738         result = wcqe->parameter;
 739
 740         if (phba->targetport)
 741                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
 742         else
 743                 tgtp = NULL;
 744
 745         lpfc_nvmeio_data(phba, "NVMET FCP CMPL: xri x%x op x%x status x%x\n",
 746                          ctxp->oxid, op, status);
 747
 748         if (status) {
 749                 rsp->fcp_error = NVME_SC_DATA_XFER_ERROR;
 750                 rsp->transferred_length = 0;
 751                 if (tgtp) {
 752                         atomic_inc(&tgtp->xmt_fcp_rsp_error);
 753                         if (result == IOERR_ABORT_REQUESTED)
 754                                 atomic_inc(&tgtp->xmt_fcp_rsp_aborted);
 755                 }
 756
 757                 logerr = LOG_NVME_IOERR;
 758
 759                 /* pick up SLI4 exhange busy condition */
 760                 if (bf_get(lpfc_wcqe_c_xb, wcqe)) {
 761                         ctxp->flag |= LPFC_NVME_XBUSY;
 762                         logerr |= LOG_NVME_ABTS;
 763                         if (tgtp)
 764                                 atomic_inc(&tgtp->xmt_fcp_rsp_xb_set);
 765
 766                 } else {
 767                         ctxp->flag &= ~LPFC_NVME_XBUSY;
 768                 }
 769
 770                 lpfc_printf_log(phba, KERN_INFO, logerr,
 771                                 "6315 IO Error Cmpl oxid: x%x xri: x%x %x/%x "
 772                                 "XBUSY:x%x\n",
 773                                 ctxp->oxid, ctxp->ctxbuf->sglq->sli4_xritag,
 774                                 status, result, ctxp->flag);
 775
 776         } else {
 777                 rsp->fcp_error = NVME_SC_SUCCESS;
 778                 if (op == NVMET_FCOP_RSP)
 779                         rsp->transferred_length = rsp->rsplen;
 780                 else
 781                         rsp->transferred_length = rsp->transfer_length;
 782                 if (tgtp)
 783                         atomic_inc(&tgtp->xmt_fcp_rsp_cmpl);
 784         }
 785
 786         if ((op == NVMET_FCOP_READDATA_RSP) ||
 787             (op == NVMET_FCOP_RSP)) {
 788                 /* Sanity check */
 789                 ctxp->state = LPFC_NVME_STE_DONE;
 790                 ctxp->entry_cnt++;
 791
 792 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 793                 if (ctxp->ts_cmd_nvme) {
 794                         if (rsp->op == NVMET_FCOP_READDATA_RSP) {
 795                                 ctxp->ts_isr_data =
 796                                         cmdwqe->isr_timestamp;
 797                                 ctxp->ts_data_nvme =
 798                                         ktime_get_ns();
 799                                 ctxp->ts_nvme_status =
 800                                         ctxp->ts_data_nvme;
 801                                 ctxp->ts_status_wqput =
 802                                         ctxp->ts_data_nvme;
 803                                 ctxp->ts_isr_status =
 804                                         ctxp->ts_data_nvme;
 805                                 ctxp->ts_status_nvme =
 806                                         ctxp->ts_data_nvme;
 807                         } else {
 808                                 ctxp->ts_isr_status =
 809                                         cmdwqe->isr_timestamp;
 810                                 ctxp->ts_status_nvme =
 811                                         ktime_get_ns();
 812                         }
 813                 }
 814 #endif
 815                 rsp->done(rsp);
 816 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 817                 if (ctxp->ts_cmd_nvme)
 818                         lpfc_nvmet_ktime(phba, ctxp);
 819 #endif
 820                 /* lpfc_nvmet_xmt_fcp_release() will recycle the context */
 821         } else {
 822                 ctxp->entry_cnt++;
 823                 memset_startat(cmdwqe, 0, cmd_flag);
 824 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 825                 if (ctxp->ts_cmd_nvme) {
 826                         ctxp->ts_isr_data = cmdwqe->isr_timestamp;
 827                         ctxp->ts_data_nvme = ktime_get_ns();
 828                 }
 829 #endif
 830                 rsp->done(rsp);
 831         }
 832 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 833         if (phba->hdwqstat_on & LPFC_CHECK_NVMET_IO) {
 834                 id = raw_smp_processor_id();
 835                 this_cpu_inc(phba->sli4_hba.c_stat->cmpl_io);
 836                 if (ctxp->cpu != id)
 837                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
 838                                         "6704 CPU Check cmdcmpl: "
 839                                         "cpu %d expect %d\n",
 840                                         id, ctxp->cpu);
 841         }
 842 #endif
 843 }
 844
 845 /**
 846  * __lpfc_nvme_xmt_ls_rsp - Generic service routine to issue transmit
 847  *         an NVME LS rsp for a prior NVME LS request that was received.
 848  * @axchg: pointer to exchange context for the NVME LS request the response
 849  *         is for.
 850  * @ls_rsp: pointer to the transport LS RSP that is to be sent
 851  * @xmt_ls_rsp_cmp: completion routine to call upon RSP transmit done
 852  *
 853  * This routine is used to format and send a WQE to transmit a NVME LS
 854  * Response.  The response is for a prior NVME LS request that was
 855  * received and posted to the transport.
 856  *
 857  * Returns:
 858  *  0 : if response successfully transmit
 859  *  non-zero : if response failed to transmit, of the form -Exxx.
 860  **/
 861 int
 862 __lpfc_nvme_xmt_ls_rsp(struct lpfc_async_xchg_ctx *axchg,
 863                         struct nvmefc_ls_rsp *ls_rsp,
 864                         void (*xmt_ls_rsp_cmp)(struct lpfc_hba *phba,
 865                                 struct lpfc_iocbq *cmdwqe,
 866                                 struct lpfc_iocbq *rspwqe))
 867 {
 868         struct lpfc_hba *phba = axchg->phba;
 869         struct hbq_dmabuf *nvmebuf = (struct hbq_dmabuf *)axchg->rqb_buffer;
 870         struct lpfc_iocbq *nvmewqeq;
 871         struct lpfc_dmabuf dmabuf;
 872         struct ulp_bde64 bpl;
 873         int rc;
 874
 875         if (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 = lpfc_next_present_cpu(cpu);
1624         }
1625
1626         for_each_present_cpu(i) {
1627                 for (j = 0; j < phba->cfg_nvmet_mrq; j++) {
1628                         infop = lpfc_get_ctx_list(phba, i, j);
1629                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME | LOG_INIT,
1630                                         "6408 TOTAL NVMET ctx for CPU %d "
1631                                         "MRQ %d: cnt %d nextcpu x%px\n",
1632                                         i, j, infop->nvmet_ctx_list_cnt,
1633                                         infop->nvmet_ctx_next_cpu);
1634                 }
1635         }
1636         return 0;
1637 }
1638
1639 int
1640 lpfc_nvmet_create_targetport(struct lpfc_hba *phba)
1641 {
1642         struct lpfc_vport  *vport = phba->pport;
1643         struct lpfc_nvmet_tgtport *tgtp;
1644         struct nvmet_fc_port_info pinfo;
1645         int error;
1646
1647         if (phba->targetport)
1648                 return 0;
1649
1650         error = lpfc_nvmet_setup_io_context(phba);
1651         if (error)
1652                 return error;
1653
1654         memset(&pinfo, 0, sizeof(struct nvmet_fc_port_info));
1655         pinfo.node_name = wwn_to_u64(vport->fc_nodename.u.wwn);
1656         pinfo.port_name = wwn_to_u64(vport->fc_portname.u.wwn);
1657         pinfo.port_id = vport->fc_myDID;
1658
1659         /* We need to tell the transport layer + 1 because it takes page
1660          * alignment into account. When space for the SGL is allocated we
1661          * allocate + 3, one for cmd, one for rsp and one for this alignment
1662          */
1663         lpfc_tgttemplate.max_sgl_segments = phba->cfg_nvme_seg_cnt + 1;
1664         lpfc_tgttemplate.max_hw_queues = phba->cfg_hdw_queue;
1665         lpfc_tgttemplate.target_features = NVMET_FCTGTFEAT_READDATA_RSP;
1666
1667 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
1668         error = nvmet_fc_register_targetport(&pinfo, &lpfc_tgttemplate,
1669                                              &phba->pcidev->dev,
1670                                              &phba->targetport);
1671 #else
1672         error = -ENOENT;
1673 #endif
1674         if (error) {
1675                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1676                                 "6025 Cannot register NVME targetport x%x: "
1677                                 "portnm %llx nodenm %llx segs %d qs %d\n",
1678                                 error,
1679                                 pinfo.port_name, pinfo.node_name,
1680                                 lpfc_tgttemplate.max_sgl_segments,
1681                                 lpfc_tgttemplate.max_hw_queues);
1682                 phba->targetport = NULL;
1683                 phba->nvmet_support = 0;
1684
1685                 lpfc_nvmet_cleanup_io_context(phba);
1686
1687         } else {
1688                 tgtp = (struct lpfc_nvmet_tgtport *)
1689                         phba->targetport->private;
1690                 tgtp->phba = phba;
1691
1692                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
1693                                 "6026 Registered NVME "
1694                                 "targetport: x%px, private x%px "
1695                                 "portnm %llx nodenm %llx segs %d qs %d\n",
1696                                 phba->targetport, tgtp,
1697                                 pinfo.port_name, pinfo.node_name,
1698                                 lpfc_tgttemplate.max_sgl_segments,
1699                                 lpfc_tgttemplate.max_hw_queues);
1700
1701                 atomic_set(&tgtp->rcv_ls_req_in, 0);
1702                 atomic_set(&tgtp->rcv_ls_req_out, 0);
1703                 atomic_set(&tgtp->rcv_ls_req_drop, 0);
1704                 atomic_set(&tgtp->xmt_ls_abort, 0);
1705                 atomic_set(&tgtp->xmt_ls_abort_cmpl, 0);
1706                 atomic_set(&tgtp->xmt_ls_rsp, 0);
1707                 atomic_set(&tgtp->xmt_ls_drop, 0);
1708                 atomic_set(&tgtp->xmt_ls_rsp_error, 0);
1709                 atomic_set(&tgtp->xmt_ls_rsp_xb_set, 0);
1710                 atomic_set(&tgtp->xmt_ls_rsp_aborted, 0);
1711                 atomic_set(&tgtp->xmt_ls_rsp_cmpl, 0);
1712                 atomic_set(&tgtp->rcv_fcp_cmd_in, 0);
1713                 atomic_set(&tgtp->rcv_fcp_cmd_out, 0);
1714                 atomic_set(&tgtp->rcv_fcp_cmd_drop, 0);
1715                 atomic_set(&tgtp->xmt_fcp_drop, 0);
1716                 atomic_set(&tgtp->xmt_fcp_read_rsp, 0);
1717                 atomic_set(&tgtp->xmt_fcp_read, 0);
1718                 atomic_set(&tgtp->xmt_fcp_write, 0);
1719                 atomic_set(&tgtp->xmt_fcp_rsp, 0);
1720                 atomic_set(&tgtp->xmt_fcp_release, 0);
1721                 atomic_set(&tgtp->xmt_fcp_rsp_cmpl, 0);
1722                 atomic_set(&tgtp->xmt_fcp_rsp_error, 0);
1723                 atomic_set(&tgtp->xmt_fcp_rsp_xb_set, 0);
1724                 atomic_set(&tgtp->xmt_fcp_rsp_aborted, 0);
1725                 atomic_set(&tgtp->xmt_fcp_rsp_drop, 0);
1726                 atomic_set(&tgtp->xmt_fcp_xri_abort_cqe, 0);
1727                 atomic_set(&tgtp->xmt_fcp_abort, 0);
1728                 atomic_set(&tgtp->xmt_fcp_abort_cmpl, 0);
1729                 atomic_set(&tgtp->xmt_abort_unsol, 0);
1730                 atomic_set(&tgtp->xmt_abort_sol, 0);
1731                 atomic_set(&tgtp->xmt_abort_rsp, 0);
1732                 atomic_set(&tgtp->xmt_abort_rsp_error, 0);
1733                 atomic_set(&tgtp->defer_ctx, 0);
1734                 atomic_set(&tgtp->defer_fod, 0);
1735                 atomic_set(&tgtp->defer_wqfull, 0);
1736         }
1737         return error;
1738 }
1739
1740 int
1741 lpfc_nvmet_update_targetport(struct lpfc_hba *phba)
1742 {
1743         struct lpfc_vport  *vport = phba->pport;
1744
1745         if (!phba->targetport)
1746                 return 0;
1747
1748         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
1749                          "6007 Update NVMET port x%px did x%x\n",
1750                          phba->targetport, vport->fc_myDID);
1751
1752         phba->targetport->port_id = vport->fc_myDID;
1753         return 0;
1754 }
1755
1756 /**
1757  * lpfc_sli4_nvmet_xri_aborted - Fast-path process of nvmet xri abort
1758  * @phba: pointer to lpfc hba data structure.
1759  * @axri: pointer to the nvmet xri abort wcqe structure.
1760  *
1761  * This routine is invoked by the worker thread to process a SLI4 fast-path
1762  * NVMET aborted xri.
1763  **/
1764 void
1765 lpfc_sli4_nvmet_xri_aborted(struct lpfc_hba *phba,
1766                             struct sli4_wcqe_xri_aborted *axri)
1767 {
1768 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
1769         uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
1770         uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
1771         struct lpfc_async_xchg_ctx *ctxp, *next_ctxp;
1772         struct lpfc_nvmet_tgtport *tgtp;
1773         struct nvmefc_tgt_fcp_req *req = NULL;
1774         struct lpfc_nodelist *ndlp;
1775         unsigned long iflag = 0;
1776         int rrq_empty = 0;
1777         bool released = false;
1778
1779         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1780                         "6317 XB aborted xri x%x rxid x%x\n", xri, rxid);
1781
1782         if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_NVME))
1783                 return;
1784
1785         if (phba->targetport) {
1786                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
1787                 atomic_inc(&tgtp->xmt_fcp_xri_abort_cqe);
1788         }
1789
1790         spin_lock_irqsave(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1791         list_for_each_entry_safe(ctxp, next_ctxp,
1792                                  &phba->sli4_hba.lpfc_abts_nvmet_ctx_list,
1793                                  list) {
1794                 if (ctxp->ctxbuf->sglq->sli4_xritag != xri)
1795                         continue;
1796
1797                 spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock,
1798                                        iflag);
1799
1800                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
1801                 /* Check if we already received a free context call
1802                  * and we have completed processing an abort situation.
1803                  */
1804                 if (ctxp->flag & LPFC_NVME_CTX_RLS &&
1805                     !(ctxp->flag & LPFC_NVME_ABORT_OP)) {
1806                         spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1807                         list_del_init(&ctxp->list);
1808                         spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1809                         released = true;
1810                 }
1811                 ctxp->flag &= ~LPFC_NVME_XBUSY;
1812                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1813
1814                 rrq_empty = list_empty(&phba->active_rrq_list);
1815                 ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
1816                 if (ndlp &&
1817                     (ndlp->nlp_state == NLP_STE_UNMAPPED_NODE ||
1818                      ndlp->nlp_state == NLP_STE_MAPPED_NODE)) {
1819                         lpfc_set_rrq_active(phba, ndlp,
1820                                 ctxp->ctxbuf->sglq->sli4_lxritag,
1821                                 rxid, 1);
1822                         lpfc_sli4_abts_err_handler(phba, ndlp, axri);
1823                 }
1824
1825                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1826                                 "6318 XB aborted oxid x%x flg x%x (%x)\n",
1827                                 ctxp->oxid, ctxp->flag, released);
1828                 if (released)
1829                         lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
1830
1831                 if (rrq_empty)
1832                         lpfc_worker_wake_up(phba);
1833                 return;
1834         }
1835         spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1836         ctxp = lpfc_nvmet_get_ctx_for_xri(phba, xri);
1837         if (ctxp) {
1838                 /*
1839                  *  Abort already done by FW, so BA_ACC sent.
1840                  *  However, the transport may be unaware.
1841                  */
1842                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1843                                 "6323 NVMET Rcv ABTS xri x%x ctxp state x%x "
1844                                 "flag x%x oxid x%x rxid x%x\n",
1845                                 xri, ctxp->state, ctxp->flag, ctxp->oxid,
1846                                 rxid);
1847
1848                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
1849                 ctxp->flag |= LPFC_NVME_ABTS_RCV;
1850                 ctxp->state = LPFC_NVME_STE_ABORT;
1851                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1852
1853                 lpfc_nvmeio_data(phba,
1854                                  "NVMET ABTS RCV: xri x%x CPU %02x rjt %d\n",
1855                                  xri, raw_smp_processor_id(), 0);
1856
1857                 req = &ctxp->hdlrctx.fcp_req;
1858                 if (req)
1859                         nvmet_fc_rcv_fcp_abort(phba->targetport, req);
1860         }
1861 #endif
1862 }
1863
1864 int
1865 lpfc_nvmet_rcv_unsol_abort(struct lpfc_vport *vport,
1866                            struct fc_frame_header *fc_hdr)
1867 {
1868 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
1869         struct lpfc_hba *phba = vport->phba;
1870         struct lpfc_async_xchg_ctx *ctxp, *next_ctxp;
1871         struct nvmefc_tgt_fcp_req *rsp;
1872         uint32_t sid;
1873         uint16_t oxid, xri;
1874         unsigned long iflag = 0;
1875
1876         sid = sli4_sid_from_fc_hdr(fc_hdr);
1877         oxid = be16_to_cpu(fc_hdr->fh_ox_id);
1878
1879         spin_lock_irqsave(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1880         list_for_each_entry_safe(ctxp, next_ctxp,
1881                                  &phba->sli4_hba.lpfc_abts_nvmet_ctx_list,
1882                                  list) {
1883                 if (ctxp->oxid != oxid || ctxp->sid != sid)
1884                         continue;
1885
1886                 xri = ctxp->ctxbuf->sglq->sli4_xritag;
1887
1888                 spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock,
1889                                        iflag);
1890                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
1891                 ctxp->flag |= LPFC_NVME_ABTS_RCV;
1892                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1893
1894                 lpfc_nvmeio_data(phba,
1895                         "NVMET ABTS RCV: xri x%x CPU %02x rjt %d\n",
1896                         xri, raw_smp_processor_id(), 0);
1897
1898                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1899                                 "6319 NVMET Rcv ABTS:acc xri x%x\n", xri);
1900
1901                 rsp = &ctxp->hdlrctx.fcp_req;
1902                 nvmet_fc_rcv_fcp_abort(phba->targetport, rsp);
1903
1904                 /* Respond with BA_ACC accordingly */
1905                 lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 1);
1906                 return 0;
1907         }
1908         spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1909         /* check the wait list */
1910         if (phba->sli4_hba.nvmet_io_wait_cnt) {
1911                 struct rqb_dmabuf *nvmebuf;
1912                 struct fc_frame_header *fc_hdr_tmp;
1913                 u32 sid_tmp;
1914                 u16 oxid_tmp;
1915                 bool found = false;
1916
1917                 spin_lock_irqsave(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
1918
1919                 /* match by oxid and s_id */
1920                 list_for_each_entry(nvmebuf,
1921                                     &phba->sli4_hba.lpfc_nvmet_io_wait_list,
1922                                     hbuf.list) {
1923                         fc_hdr_tmp = (struct fc_frame_header *)
1924                                         (nvmebuf->hbuf.virt);
1925                         oxid_tmp = be16_to_cpu(fc_hdr_tmp->fh_ox_id);
1926                         sid_tmp = sli4_sid_from_fc_hdr(fc_hdr_tmp);
1927                         if (oxid_tmp != oxid || sid_tmp != sid)
1928                                 continue;
1929
1930                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1931                                         "6321 NVMET Rcv ABTS oxid x%x from x%x "
1932                                         "is waiting for a ctxp\n",
1933                                         oxid, sid);
1934
1935                         list_del_init(&nvmebuf->hbuf.list);
1936                         phba->sli4_hba.nvmet_io_wait_cnt--;
1937                         found = true;
1938                         break;
1939                 }
1940                 spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock,
1941                                        iflag);
1942
1943                 /* free buffer since already posted a new DMA buffer to RQ */
1944                 if (found) {
1945                         nvmebuf->hrq->rqbp->rqb_free_buffer(phba, nvmebuf);
1946                         /* Respond with BA_ACC accordingly */
1947                         lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 1);
1948                         return 0;
1949                 }
1950         }
1951
1952         /* check active list */
1953         ctxp = lpfc_nvmet_get_ctx_for_oxid(phba, oxid, sid);
1954         if (ctxp) {
1955                 xri = ctxp->ctxbuf->sglq->sli4_xritag;
1956
1957                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
1958                 ctxp->flag |= (LPFC_NVME_ABTS_RCV | LPFC_NVME_ABORT_OP);
1959                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1960
1961                 lpfc_nvmeio_data(phba,
1962                                  "NVMET ABTS RCV: xri x%x CPU %02x rjt %d\n",
1963                                  xri, raw_smp_processor_id(), 0);
1964
1965                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1966                                 "6322 NVMET Rcv ABTS:acc oxid x%x xri x%x "
1967                                 "flag x%x state x%x\n",
1968                                 ctxp->oxid, xri, ctxp->flag, ctxp->state);
1969
1970                 if (ctxp->flag & LPFC_NVME_TNOTIFY) {
1971                         /* Notify the transport */
1972                         nvmet_fc_rcv_fcp_abort(phba->targetport,
1973                                                &ctxp->hdlrctx.fcp_req);
1974                 } else {
1975                         cancel_work_sync(&ctxp->ctxbuf->defer_work);
1976                         spin_lock_irqsave(&ctxp->ctxlock, iflag);
1977                         lpfc_nvmet_defer_release(phba, ctxp);
1978                         spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1979                 }
1980                 lpfc_nvmet_sol_fcp_issue_abort(phba, ctxp, ctxp->sid,
1981                                                ctxp->oxid);
1982
1983                 lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 1);
1984                 return 0;
1985         }
1986
1987         lpfc_nvmeio_data(phba, "NVMET ABTS RCV: oxid x%x CPU %02x rjt %d\n",
1988                          oxid, raw_smp_processor_id(), 1);
1989
1990         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1991                         "6320 NVMET Rcv ABTS:rjt oxid x%x\n", oxid);
1992
1993         /* Respond with BA_RJT accordingly */
1994         lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 0);
1995 #endif
1996         return 0;
1997 }
1998
1999 static void
2000 lpfc_nvmet_wqfull_flush(struct lpfc_hba *phba, struct lpfc_queue *wq,
2001                         struct lpfc_async_xchg_ctx *ctxp)
2002 {
2003         struct lpfc_sli_ring *pring;
2004         struct lpfc_iocbq *nvmewqeq;
2005         struct lpfc_iocbq *next_nvmewqeq;
2006         unsigned long iflags;
2007         struct lpfc_wcqe_complete wcqe;
2008         struct lpfc_wcqe_complete *wcqep;
2009
2010         pring = wq->pring;
2011         wcqep = &wcqe;
2012
2013         /* Fake an ABORT error code back to cmpl routine */
2014         memset(wcqep, 0, sizeof(struct lpfc_wcqe_complete));
2015         bf_set(lpfc_wcqe_c_status, wcqep, IOSTAT_LOCAL_REJECT);
2016         wcqep->parameter = IOERR_ABORT_REQUESTED;
2017
2018         spin_lock_irqsave(&pring->ring_lock, iflags);
2019         list_for_each_entry_safe(nvmewqeq, next_nvmewqeq,
2020                                  &wq->wqfull_list, list) {
2021                 if (ctxp) {
2022                         /* Checking for a specific IO to flush */
2023                         if (nvmewqeq->context_un.axchg == ctxp) {
2024                                 list_del(&nvmewqeq->list);
2025                                 spin_unlock_irqrestore(&pring->ring_lock,
2026                                                        iflags);
2027                                 memcpy(&nvmewqeq->wcqe_cmpl, wcqep,
2028                                        sizeof(*wcqep));
2029                                 lpfc_nvmet_xmt_fcp_op_cmp(phba, nvmewqeq,
2030                                                           nvmewqeq);
2031                                 return;
2032                         }
2033                         continue;
2034                 } else {
2035                         /* Flush all IOs */
2036                         list_del(&nvmewqeq->list);
2037                         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2038                         memcpy(&nvmewqeq->wcqe_cmpl, wcqep, sizeof(*wcqep));
2039                         lpfc_nvmet_xmt_fcp_op_cmp(phba, nvmewqeq, nvmewqeq);
2040                         spin_lock_irqsave(&pring->ring_lock, iflags);
2041                 }
2042         }
2043         if (!ctxp)
2044                 wq->q_flag &= ~HBA_NVMET_WQFULL;
2045         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2046 }
2047
2048 void
2049 lpfc_nvmet_wqfull_process(struct lpfc_hba *phba,
2050                           struct lpfc_queue *wq)
2051 {
2052 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2053         struct lpfc_sli_ring *pring;
2054         struct lpfc_iocbq *nvmewqeq;
2055         struct lpfc_async_xchg_ctx *ctxp;
2056         unsigned long iflags;
2057         int rc;
2058
2059         /*
2060          * Some WQE slots are available, so try to re-issue anything
2061          * on the WQ wqfull_list.
2062          */
2063         pring = wq->pring;
2064         spin_lock_irqsave(&pring->ring_lock, iflags);
2065         while (!list_empty(&wq->wqfull_list)) {
2066                 list_remove_head(&wq->wqfull_list, nvmewqeq, struct lpfc_iocbq,
2067                                  list);
2068                 spin_unlock_irqrestore(&pring->ring_lock, iflags);
2069                 ctxp = nvmewqeq->context_un.axchg;
2070                 rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, nvmewqeq);
2071                 spin_lock_irqsave(&pring->ring_lock, iflags);
2072                 if (rc == -EBUSY) {
2073                         /* WQ was full again, so put it back on the list */
2074                         list_add(&nvmewqeq->list, &wq->wqfull_list);
2075                         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2076                         return;
2077                 }
2078                 if (rc == WQE_SUCCESS) {
2079 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2080                         if (ctxp->ts_cmd_nvme) {
2081                                 if (ctxp->hdlrctx.fcp_req.op == NVMET_FCOP_RSP)
2082                                         ctxp->ts_status_wqput = ktime_get_ns();
2083                                 else
2084                                         ctxp->ts_data_wqput = ktime_get_ns();
2085                         }
2086 #endif
2087                 } else {
2088                         WARN_ON(rc);
2089                 }
2090         }
2091         wq->q_flag &= ~HBA_NVMET_WQFULL;
2092         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2093
2094 #endif
2095 }
2096
2097 void
2098 lpfc_nvmet_destroy_targetport(struct lpfc_hba *phba)
2099 {
2100 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2101         struct lpfc_nvmet_tgtport *tgtp;
2102         struct lpfc_queue *wq;
2103         uint32_t qidx;
2104         DECLARE_COMPLETION_ONSTACK(tport_unreg_cmp);
2105
2106         if (phba->nvmet_support == 0)
2107                 return;
2108         if (phba->targetport) {
2109                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2110                 for (qidx = 0; qidx < phba->cfg_hdw_queue; qidx++) {
2111                         wq = phba->sli4_hba.hdwq[qidx].io_wq;
2112                         lpfc_nvmet_wqfull_flush(phba, wq, NULL);
2113                 }
2114                 tgtp->tport_unreg_cmp = &tport_unreg_cmp;
2115                 nvmet_fc_unregister_targetport(phba->targetport);
2116                 if (!wait_for_completion_timeout(&tport_unreg_cmp,
2117                                         msecs_to_jiffies(LPFC_NVMET_WAIT_TMO)))
2118                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2119                                         "6179 Unreg targetport x%px timeout "
2120                                         "reached.\n", phba->targetport);
2121                 lpfc_nvmet_cleanup_io_context(phba);
2122         }
2123         phba->targetport = NULL;
2124 #endif
2125 }
2126
2127 /**
2128  * lpfc_nvmet_handle_lsreq - Process an NVME LS request
2129  * @phba: pointer to lpfc hba data structure.
2130  * @axchg: pointer to exchange context for the NVME LS request
2131  *
2132  * This routine is used for processing an asychronously received NVME LS
2133  * request. Any remaining validation is done and the LS is then forwarded
2134  * to the nvmet-fc transport via nvmet_fc_rcv_ls_req().
2135  *
2136  * The calling sequence should be: nvmet_fc_rcv_ls_req() -> (processing)
2137  * -> lpfc_nvmet_xmt_ls_rsp/cmp -> req->done.
2138  * lpfc_nvme_xmt_ls_rsp_cmp should free the allocated axchg.
2139  *
2140  * Returns 0 if LS was handled and delivered to the transport
2141  * Returns 1 if LS failed to be handled and should be dropped
2142  */
2143 int
2144 lpfc_nvmet_handle_lsreq(struct lpfc_hba *phba,
2145                         struct lpfc_async_xchg_ctx *axchg)
2146 {
2147 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2148         struct lpfc_nvmet_tgtport *tgtp = phba->targetport->private;
2149         uint32_t *payload = axchg->payload;
2150         int rc;
2151
2152         atomic_inc(&tgtp->rcv_ls_req_in);
2153
2154         /*
2155          * Driver passes the ndlp as the hosthandle argument allowing
2156          * the transport to generate LS requests for any associateions
2157          * that are created.
2158          */
2159         rc = nvmet_fc_rcv_ls_req(phba->targetport, axchg->ndlp, &axchg->ls_rsp,
2160                                  axchg->payload, axchg->size);
2161
2162         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
2163                         "6037 NVMET Unsol rcv: sz %d rc %d: %08x %08x %08x "
2164                         "%08x %08x %08x\n", axchg->size, rc,
2165                         *payload, *(payload+1), *(payload+2),
2166                         *(payload+3), *(payload+4), *(payload+5));
2167
2168         if (!rc) {
2169                 atomic_inc(&tgtp->rcv_ls_req_out);
2170                 return 0;
2171         }
2172
2173         atomic_inc(&tgtp->rcv_ls_req_drop);
2174 #endif
2175         return 1;
2176 }
2177
2178 static void
2179 lpfc_nvmet_process_rcv_fcp_req(struct lpfc_nvmet_ctxbuf *ctx_buf)
2180 {
2181 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2182         struct lpfc_async_xchg_ctx *ctxp = ctx_buf->context;
2183         struct lpfc_hba *phba = ctxp->phba;
2184         struct rqb_dmabuf *nvmebuf = ctxp->rqb_buffer;
2185         struct lpfc_nvmet_tgtport *tgtp;
2186         uint32_t *payload, qno;
2187         uint32_t rc;
2188         unsigned long iflags;
2189
2190         if (!nvmebuf) {
2191                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2192                         "6159 process_rcv_fcp_req, nvmebuf is NULL, "
2193                         "oxid: x%x flg: x%x state: x%x\n",
2194                         ctxp->oxid, ctxp->flag, ctxp->state);
2195                 spin_lock_irqsave(&ctxp->ctxlock, iflags);
2196                 lpfc_nvmet_defer_release(phba, ctxp);
2197                 spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2198                 lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid,
2199                                                  ctxp->oxid);
2200                 return;
2201         }
2202
2203         if (ctxp->flag & LPFC_NVME_ABTS_RCV) {
2204                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2205                                 "6324 IO oxid x%x aborted\n",
2206                                 ctxp->oxid);
2207                 return;
2208         }
2209
2210         payload = (uint32_t *)(nvmebuf->dbuf.virt);
2211         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2212         ctxp->flag |= LPFC_NVME_TNOTIFY;
2213 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2214         if (ctxp->ts_isr_cmd)
2215                 ctxp->ts_cmd_nvme = ktime_get_ns();
2216 #endif
2217         /*
2218          * The calling sequence should be:
2219          * nvmet_fc_rcv_fcp_req->lpfc_nvmet_xmt_fcp_op/cmp- req->done
2220          * lpfc_nvmet_xmt_fcp_op_cmp should free the allocated ctxp.
2221          * When we return from nvmet_fc_rcv_fcp_req, all relevant info
2222          * the NVME command / FC header is stored.
2223          * A buffer has already been reposted for this IO, so just free
2224          * the nvmebuf.
2225          */
2226         rc = nvmet_fc_rcv_fcp_req(phba->targetport, &ctxp->hdlrctx.fcp_req,
2227                                   payload, ctxp->size);
2228         /* Process FCP command */
2229         if (rc == 0) {
2230                 atomic_inc(&tgtp->rcv_fcp_cmd_out);
2231                 spin_lock_irqsave(&ctxp->ctxlock, iflags);
2232                 if ((ctxp->flag & LPFC_NVME_CTX_REUSE_WQ) ||
2233                     (nvmebuf != ctxp->rqb_buffer)) {
2234                         spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2235                         return;
2236                 }
2237                 ctxp->rqb_buffer = NULL;
2238                 spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2239                 lpfc_rq_buf_free(phba, &nvmebuf->hbuf); /* repost */
2240                 return;
2241         }
2242
2243         /* Processing of FCP command is deferred */
2244         if (rc == -EOVERFLOW) {
2245                 lpfc_nvmeio_data(phba, "NVMET RCV BUSY: xri x%x sz %d "
2246                                  "from %06x\n",
2247                                  ctxp->oxid, ctxp->size, ctxp->sid);
2248                 atomic_inc(&tgtp->rcv_fcp_cmd_out);
2249                 atomic_inc(&tgtp->defer_fod);
2250                 spin_lock_irqsave(&ctxp->ctxlock, iflags);
2251                 if (ctxp->flag & LPFC_NVME_CTX_REUSE_WQ) {
2252                         spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2253                         return;
2254                 }
2255                 spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2256                 /*
2257                  * Post a replacement DMA buffer to RQ and defer
2258                  * freeing rcv buffer till .defer_rcv callback
2259                  */
2260                 qno = nvmebuf->idx;
2261                 lpfc_post_rq_buffer(
2262                         phba, phba->sli4_hba.nvmet_mrq_hdr[qno],
2263                         phba->sli4_hba.nvmet_mrq_data[qno], 1, qno);
2264                 return;
2265         }
2266         ctxp->flag &= ~LPFC_NVME_TNOTIFY;
2267         atomic_inc(&tgtp->rcv_fcp_cmd_drop);
2268         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2269                         "2582 FCP Drop IO x%x: err x%x: x%x x%x x%x\n",
2270                         ctxp->oxid, rc,
2271                         atomic_read(&tgtp->rcv_fcp_cmd_in),
2272                         atomic_read(&tgtp->rcv_fcp_cmd_out),
2273                         atomic_read(&tgtp->xmt_fcp_release));
2274         lpfc_nvmeio_data(phba, "NVMET FCP DROP: xri x%x sz %d from %06x\n",
2275                          ctxp->oxid, ctxp->size, ctxp->sid);
2276         spin_lock_irqsave(&ctxp->ctxlock, iflags);
2277         lpfc_nvmet_defer_release(phba, ctxp);
2278         spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2279         lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid, ctxp->oxid);
2280 #endif
2281 }
2282
2283 static void
2284 lpfc_nvmet_fcp_rqst_defer_work(struct work_struct *work)
2285 {
2286 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2287         struct lpfc_nvmet_ctxbuf *ctx_buf =
2288                 container_of(work, struct lpfc_nvmet_ctxbuf, defer_work);
2289
2290         lpfc_nvmet_process_rcv_fcp_req(ctx_buf);
2291 #endif
2292 }
2293
2294 static struct lpfc_nvmet_ctxbuf *
2295 lpfc_nvmet_replenish_context(struct lpfc_hba *phba,
2296                              struct lpfc_nvmet_ctx_info *current_infop)
2297 {
2298 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2299         struct lpfc_nvmet_ctxbuf *ctx_buf = NULL;
2300         struct lpfc_nvmet_ctx_info *get_infop;
2301         int i;
2302
2303         /*
2304          * The current_infop for the MRQ a NVME command IU was received
2305          * on is empty. Our goal is to replenish this MRQs context
2306          * list from a another CPUs.
2307          *
2308          * First we need to pick a context list to start looking on.
2309          * nvmet_ctx_start_cpu has available context the last time
2310          * we needed to replenish this CPU where nvmet_ctx_next_cpu
2311          * is just the next sequential CPU for this MRQ.
2312          */
2313         if (current_infop->nvmet_ctx_start_cpu)
2314                 get_infop = current_infop->nvmet_ctx_start_cpu;
2315         else
2316                 get_infop = current_infop->nvmet_ctx_next_cpu;
2317
2318         for (i = 0; i < phba->sli4_hba.num_possible_cpu; i++) {
2319                 if (get_infop == current_infop) {
2320                         get_infop = get_infop->nvmet_ctx_next_cpu;
2321                         continue;
2322                 }
2323                 spin_lock(&get_infop->nvmet_ctx_list_lock);
2324
2325                 /* Just take the entire context list, if there are any */
2326                 if (get_infop->nvmet_ctx_list_cnt) {
2327                         list_splice_init(&get_infop->nvmet_ctx_list,
2328                                     &current_infop->nvmet_ctx_list);
2329                         current_infop->nvmet_ctx_list_cnt =
2330                                 get_infop->nvmet_ctx_list_cnt - 1;
2331                         get_infop->nvmet_ctx_list_cnt = 0;
2332                         spin_unlock(&get_infop->nvmet_ctx_list_lock);
2333
2334                         current_infop->nvmet_ctx_start_cpu = get_infop;
2335                         list_remove_head(&current_infop->nvmet_ctx_list,
2336                                          ctx_buf, struct lpfc_nvmet_ctxbuf,
2337                                          list);
2338                         return ctx_buf;
2339                 }
2340
2341                 /* Otherwise, move on to the next CPU for this MRQ */
2342                 spin_unlock(&get_infop->nvmet_ctx_list_lock);
2343                 get_infop = get_infop->nvmet_ctx_next_cpu;
2344         }
2345
2346 #endif
2347         /* Nothing found, all contexts for the MRQ are in-flight */
2348         return NULL;
2349 }
2350
2351 /**
2352  * lpfc_nvmet_unsol_fcp_buffer - Process an unsolicited event data buffer
2353  * @phba: pointer to lpfc hba data structure.
2354  * @idx: relative index of MRQ vector
2355  * @nvmebuf: pointer to lpfc nvme command HBQ data structure.
2356  * @isr_timestamp: in jiffies.
2357  * @cqflag: cq processing information regarding workload.
2358  *
2359  * This routine is used for processing the WQE associated with a unsolicited
2360  * event. It first determines whether there is an existing ndlp that matches
2361  * the DID from the unsolicited WQE. If not, it will create a new one with
2362  * the DID from the unsolicited WQE. The ELS command from the unsolicited
2363  * WQE is then used to invoke the proper routine and to set up proper state
2364  * of the discovery state machine.
2365  **/
2366 static void
2367 lpfc_nvmet_unsol_fcp_buffer(struct lpfc_hba *phba,
2368                             uint32_t idx,
2369                             struct rqb_dmabuf *nvmebuf,
2370                             uint64_t isr_timestamp,
2371                             uint8_t cqflag)
2372 {
2373         struct lpfc_async_xchg_ctx *ctxp;
2374         struct lpfc_nvmet_tgtport *tgtp;
2375         struct fc_frame_header *fc_hdr;
2376         struct lpfc_nvmet_ctxbuf *ctx_buf;
2377         struct lpfc_nvmet_ctx_info *current_infop;
2378         uint32_t size, oxid, sid, qno;
2379         unsigned long iflag;
2380         int current_cpu;
2381
2382         if (!IS_ENABLED(CONFIG_NVME_TARGET_FC))
2383                 return;
2384
2385         ctx_buf = NULL;
2386         if (!nvmebuf || !phba->targetport) {
2387                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2388                                 "6157 NVMET FCP Drop IO\n");
2389                 if (nvmebuf)
2390                         lpfc_rq_buf_free(phba, &nvmebuf->hbuf);
2391                 return;
2392         }
2393
2394         /*
2395          * Get a pointer to the context list for this MRQ based on
2396          * the CPU this MRQ IRQ is associated with. If the CPU association
2397          * changes from our initial assumption, the context list could
2398          * be empty, thus it would need to be replenished with the
2399          * context list from another CPU for this MRQ.
2400          */
2401         current_cpu = raw_smp_processor_id();
2402         current_infop = lpfc_get_ctx_list(phba, current_cpu, idx);
2403         spin_lock_irqsave(&current_infop->nvmet_ctx_list_lock, iflag);
2404         if (current_infop->nvmet_ctx_list_cnt) {
2405                 list_remove_head(&current_infop->nvmet_ctx_list,
2406                                  ctx_buf, struct lpfc_nvmet_ctxbuf, list);
2407                 current_infop->nvmet_ctx_list_cnt--;
2408         } else {
2409                 ctx_buf = lpfc_nvmet_replenish_context(phba, current_infop);
2410         }
2411         spin_unlock_irqrestore(&current_infop->nvmet_ctx_list_lock, iflag);
2412
2413         fc_hdr = (struct fc_frame_header *)(nvmebuf->hbuf.virt);
2414         oxid = be16_to_cpu(fc_hdr->fh_ox_id);
2415         size = nvmebuf->bytes_recv;
2416
2417 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2418         if (phba->hdwqstat_on & LPFC_CHECK_NVMET_IO) {
2419                 this_cpu_inc(phba->sli4_hba.c_stat->rcv_io);
2420                 if (idx != current_cpu)
2421                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
2422                                         "6703 CPU Check rcv: "
2423                                         "cpu %d expect %d\n",
2424                                         current_cpu, idx);
2425         }
2426 #endif
2427
2428         lpfc_nvmeio_data(phba, "NVMET FCP  RCV: xri x%x sz %d CPU %02x\n",
2429                          oxid, size, raw_smp_processor_id());
2430
2431         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2432
2433         if (!ctx_buf) {
2434                 /* Queue this NVME IO to process later */
2435                 spin_lock_irqsave(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
2436                 list_add_tail(&nvmebuf->hbuf.list,
2437                               &phba->sli4_hba.lpfc_nvmet_io_wait_list);
2438                 phba->sli4_hba.nvmet_io_wait_cnt++;
2439                 phba->sli4_hba.nvmet_io_wait_total++;
2440                 spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock,
2441                                        iflag);
2442
2443                 /* Post a brand new DMA buffer to RQ */
2444                 qno = nvmebuf->idx;
2445                 lpfc_post_rq_buffer(
2446                         phba, phba->sli4_hba.nvmet_mrq_hdr[qno],
2447                         phba->sli4_hba.nvmet_mrq_data[qno], 1, qno);
2448
2449                 atomic_inc(&tgtp->defer_ctx);
2450                 return;
2451         }
2452
2453         sid = sli4_sid_from_fc_hdr(fc_hdr);
2454
2455         ctxp = (struct lpfc_async_xchg_ctx *)ctx_buf->context;
2456         spin_lock_irqsave(&phba->sli4_hba.t_active_list_lock, iflag);
2457         list_add_tail(&ctxp->list, &phba->sli4_hba.t_active_ctx_list);
2458         spin_unlock_irqrestore(&phba->sli4_hba.t_active_list_lock, iflag);
2459         if (ctxp->state != LPFC_NVME_STE_FREE) {
2460                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2461                                 "6414 NVMET Context corrupt %d %d oxid x%x\n",
2462                                 ctxp->state, ctxp->entry_cnt, ctxp->oxid);
2463         }
2464         ctxp->wqeq = NULL;
2465         ctxp->offset = 0;
2466         ctxp->phba = phba;
2467         ctxp->size = size;
2468         ctxp->oxid = oxid;
2469         ctxp->sid = sid;
2470         ctxp->idx = idx;
2471         ctxp->state = LPFC_NVME_STE_RCV;
2472         ctxp->entry_cnt = 1;
2473         ctxp->flag = 0;
2474         ctxp->ctxbuf = ctx_buf;
2475         ctxp->rqb_buffer = (void *)nvmebuf;
2476         ctxp->hdwq = NULL;
2477         spin_lock_init(&ctxp->ctxlock);
2478
2479 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2480         if (isr_timestamp)
2481                 ctxp->ts_isr_cmd = isr_timestamp;
2482         ctxp->ts_cmd_nvme = 0;
2483         ctxp->ts_nvme_data = 0;
2484         ctxp->ts_data_wqput = 0;
2485         ctxp->ts_isr_data = 0;
2486         ctxp->ts_data_nvme = 0;
2487         ctxp->ts_nvme_status = 0;
2488         ctxp->ts_status_wqput = 0;
2489         ctxp->ts_isr_status = 0;
2490         ctxp->ts_status_nvme = 0;
2491 #endif
2492
2493         atomic_inc(&tgtp->rcv_fcp_cmd_in);
2494         /* check for cq processing load */
2495         if (!cqflag) {
2496                 lpfc_nvmet_process_rcv_fcp_req(ctx_buf);
2497                 return;
2498         }
2499
2500         if (!queue_work(phba->wq, &ctx_buf->defer_work)) {
2501                 atomic_inc(&tgtp->rcv_fcp_cmd_drop);
2502                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2503                                 "6325 Unable to queue work for oxid x%x. "
2504                                 "FCP Drop IO [x%x x%x x%x]\n",
2505                                 ctxp->oxid,
2506                                 atomic_read(&tgtp->rcv_fcp_cmd_in),
2507                                 atomic_read(&tgtp->rcv_fcp_cmd_out),
2508                                 atomic_read(&tgtp->xmt_fcp_release));
2509
2510                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
2511                 lpfc_nvmet_defer_release(phba, ctxp);
2512                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
2513                 lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, sid, oxid);
2514         }
2515 }
2516
2517 /**
2518  * lpfc_nvmet_unsol_fcp_event - Process an unsolicited event from an nvme nport
2519  * @phba: pointer to lpfc hba data structure.
2520  * @idx: relative index of MRQ vector
2521  * @nvmebuf: pointer to received nvme data structure.
2522  * @isr_timestamp: in jiffies.
2523  * @cqflag: cq processing information regarding workload.
2524  *
2525  * This routine is used to process an unsolicited event received from a SLI
2526  * (Service Level Interface) ring. The actual processing of the data buffer
2527  * associated with the unsolicited event is done by invoking the routine
2528  * lpfc_nvmet_unsol_fcp_buffer() after properly set up the buffer from the
2529  * SLI RQ on which the unsolicited event was received.
2530  **/
2531 void
2532 lpfc_nvmet_unsol_fcp_event(struct lpfc_hba *phba,
2533                            uint32_t idx,
2534                            struct rqb_dmabuf *nvmebuf,
2535                            uint64_t isr_timestamp,
2536                            uint8_t cqflag)
2537 {
2538         if (!nvmebuf) {
2539                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2540                                 "3167 NVMET FCP Drop IO\n");
2541                 return;
2542         }
2543         if (phba->nvmet_support == 0) {
2544                 lpfc_rq_buf_free(phba, &nvmebuf->hbuf);
2545                 return;
2546         }
2547         lpfc_nvmet_unsol_fcp_buffer(phba, idx, nvmebuf, isr_timestamp, cqflag);
2548 }
2549
2550 /**
2551  * lpfc_nvmet_prep_ls_wqe - Allocate and prepare a lpfc wqe data structure
2552  * @phba: pointer to a host N_Port data structure.
2553  * @ctxp: Context info for NVME LS Request
2554  * @rspbuf: DMA buffer of NVME command.
2555  * @rspsize: size of the NVME command.
2556  *
2557  * This routine is used for allocating a lpfc-WQE data structure from
2558  * the driver lpfc-WQE free-list and prepare the WQE with the parameters
2559  * passed into the routine for discovery state machine to issue an Extended
2560  * Link Service (NVME) commands. It is a generic lpfc-WQE allocation
2561  * and preparation routine that is used by all the discovery state machine
2562  * routines and the NVME command-specific fields will be later set up by
2563  * the individual discovery machine routines after calling this routine
2564  * allocating and preparing a generic WQE data structure. It fills in the
2565  * Buffer Descriptor Entries (BDEs), allocates buffers for both command
2566  * payload and response payload (if expected). The reference count on the
2567  * ndlp is incremented by 1 and the reference to the ndlp is put into
2568  * context1 of the WQE data structure for this WQE to hold the ndlp
2569  * reference for the command's callback function to access later.
2570  *
2571  * Return code
2572  *   Pointer to the newly allocated/prepared nvme wqe data structure
2573  *   NULL - when nvme wqe data structure allocation/preparation failed
2574  **/
2575 static struct lpfc_iocbq *
2576 lpfc_nvmet_prep_ls_wqe(struct lpfc_hba *phba,
2577                        struct lpfc_async_xchg_ctx *ctxp,
2578                        dma_addr_t rspbuf, uint16_t rspsize)
2579 {
2580         struct lpfc_nodelist *ndlp;
2581         struct lpfc_iocbq *nvmewqe;
2582         union lpfc_wqe128 *wqe;
2583
2584         if (!lpfc_is_link_up(phba)) {
2585                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2586                                 "6104 NVMET prep LS wqe: link err: "
2587                                 "NPORT x%x oxid:x%x ste %d\n",
2588                                 ctxp->sid, ctxp->oxid, ctxp->state);
2589                 return NULL;
2590         }
2591
2592         /* Allocate buffer for  command wqe */
2593         nvmewqe = lpfc_sli_get_iocbq(phba);
2594         if (nvmewqe == NULL) {
2595                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2596                                 "6105 NVMET prep LS wqe: No WQE: "
2597                                 "NPORT x%x oxid x%x ste %d\n",
2598                                 ctxp->sid, ctxp->oxid, ctxp->state);
2599                 return NULL;
2600         }
2601
2602         ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
2603         if (!ndlp ||
2604             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
2605             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
2606                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2607                                 "6106 NVMET prep LS wqe: No ndlp: "
2608                                 "NPORT x%x oxid x%x ste %d\n",
2609                                 ctxp->sid, ctxp->oxid, ctxp->state);
2610                 goto nvme_wqe_free_wqeq_exit;
2611         }
2612         ctxp->wqeq = nvmewqe;
2613
2614         /* prevent preparing wqe with NULL ndlp reference */
2615         nvmewqe->ndlp = lpfc_nlp_get(ndlp);
2616         if (!nvmewqe->ndlp)
2617                 goto nvme_wqe_free_wqeq_exit;
2618         nvmewqe->context_un.axchg = ctxp;
2619
2620         wqe = &nvmewqe->wqe;
2621         memset(wqe, 0, sizeof(union lpfc_wqe));
2622
2623         /* Words 0 - 2 */
2624         wqe->xmit_sequence.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2625         wqe->xmit_sequence.bde.tus.f.bdeSize = rspsize;
2626         wqe->xmit_sequence.bde.addrLow = le32_to_cpu(putPaddrLow(rspbuf));
2627         wqe->xmit_sequence.bde.addrHigh = le32_to_cpu(putPaddrHigh(rspbuf));
2628
2629         /* Word 3 */
2630
2631         /* Word 4 */
2632
2633         /* Word 5 */
2634         bf_set(wqe_dfctl, &wqe->xmit_sequence.wge_ctl, 0);
2635         bf_set(wqe_ls, &wqe->xmit_sequence.wge_ctl, 1);
2636         bf_set(wqe_la, &wqe->xmit_sequence.wge_ctl, 0);
2637         bf_set(wqe_rctl, &wqe->xmit_sequence.wge_ctl, FC_RCTL_ELS4_REP);
2638         bf_set(wqe_type, &wqe->xmit_sequence.wge_ctl, FC_TYPE_NVME);
2639
2640         /* Word 6 */
2641         bf_set(wqe_ctxt_tag, &wqe->xmit_sequence.wqe_com,
2642                phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2643         bf_set(wqe_xri_tag, &wqe->xmit_sequence.wqe_com, nvmewqe->sli4_xritag);
2644
2645         /* Word 7 */
2646         bf_set(wqe_cmnd, &wqe->xmit_sequence.wqe_com,
2647                CMD_XMIT_SEQUENCE64_WQE);
2648         bf_set(wqe_ct, &wqe->xmit_sequence.wqe_com, SLI4_CT_RPI);
2649         bf_set(wqe_class, &wqe->xmit_sequence.wqe_com, CLASS3);
2650         bf_set(wqe_pu, &wqe->xmit_sequence.wqe_com, 0);
2651
2652         /* Word 8 */
2653         wqe->xmit_sequence.wqe_com.abort_tag = nvmewqe->iotag;
2654
2655         /* Word 9 */
2656         bf_set(wqe_reqtag, &wqe->xmit_sequence.wqe_com, nvmewqe->iotag);
2657         /* Needs to be set by caller */
2658         bf_set(wqe_rcvoxid, &wqe->xmit_sequence.wqe_com, ctxp->oxid);
2659
2660         /* Word 10 */
2661         bf_set(wqe_dbde, &wqe->xmit_sequence.wqe_com, 1);
2662         bf_set(wqe_iod, &wqe->xmit_sequence.wqe_com, LPFC_WQE_IOD_WRITE);
2663         bf_set(wqe_lenloc, &wqe->xmit_sequence.wqe_com,
2664                LPFC_WQE_LENLOC_WORD12);
2665         bf_set(wqe_ebde_cnt, &wqe->xmit_sequence.wqe_com, 0);
2666
2667         /* Word 11 */
2668         bf_set(wqe_cqid, &wqe->xmit_sequence.wqe_com,
2669                LPFC_WQE_CQ_ID_DEFAULT);
2670         bf_set(wqe_cmd_type, &wqe->xmit_sequence.wqe_com,
2671                OTHER_COMMAND);
2672
2673         /* Word 12 */
2674         wqe->xmit_sequence.xmit_len = rspsize;
2675
2676         nvmewqe->retry = 1;
2677         nvmewqe->vport = phba->pport;
2678         nvmewqe->drvrTimeout = (phba->fc_ratov * 3) + LPFC_DRVR_TIMEOUT;
2679         nvmewqe->cmd_flag |= LPFC_IO_NVME_LS;
2680
2681         /* Xmit NVMET response to remote NPORT <did> */
2682         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
2683                         "6039 Xmit NVMET LS response to remote "
2684                         "NPORT x%x iotag:x%x oxid:x%x size:x%x\n",
2685                         ndlp->nlp_DID, nvmewqe->iotag, ctxp->oxid,
2686                         rspsize);
2687         return nvmewqe;
2688
2689 nvme_wqe_free_wqeq_exit:
2690         nvmewqe->context_un.axchg = NULL;
2691         nvmewqe->ndlp = NULL;
2692         nvmewqe->bpl_dmabuf = NULL;
2693         lpfc_sli_release_iocbq(phba, nvmewqe);
2694         return NULL;
2695 }
2696
2697
2698 static struct lpfc_iocbq *
2699 lpfc_nvmet_prep_fcp_wqe(struct lpfc_hba *phba,
2700                         struct lpfc_async_xchg_ctx *ctxp)
2701 {
2702         struct nvmefc_tgt_fcp_req *rsp = &ctxp->hdlrctx.fcp_req;
2703         struct lpfc_nvmet_tgtport *tgtp;
2704         struct sli4_sge *sgl;
2705         struct lpfc_nodelist *ndlp;
2706         struct lpfc_iocbq *nvmewqe;
2707         struct scatterlist *sgel;
2708         union lpfc_wqe128 *wqe;
2709         struct ulp_bde64 *bde;
2710         dma_addr_t physaddr;
2711         int i, cnt, nsegs;
2712         bool use_pbde = false;
2713         int xc = 1;
2714
2715         if (!lpfc_is_link_up(phba)) {
2716                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2717                                 "6107 NVMET prep FCP wqe: link err:"
2718                                 "NPORT x%x oxid x%x ste %d\n",
2719                                 ctxp->sid, ctxp->oxid, ctxp->state);
2720                 return NULL;
2721         }
2722
2723         ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
2724         if (!ndlp ||
2725             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
2726              (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
2727                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2728                                 "6108 NVMET prep FCP wqe: no ndlp: "
2729                                 "NPORT x%x oxid x%x ste %d\n",
2730                                 ctxp->sid, ctxp->oxid, ctxp->state);
2731                 return NULL;
2732         }
2733
2734         if (rsp->sg_cnt > lpfc_tgttemplate.max_sgl_segments) {
2735                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2736                                 "6109 NVMET prep FCP wqe: seg cnt err: "
2737                                 "NPORT x%x oxid x%x ste %d cnt %d\n",
2738                                 ctxp->sid, ctxp->oxid, ctxp->state,
2739                                 phba->cfg_nvme_seg_cnt);
2740                 return NULL;
2741         }
2742         nsegs = rsp->sg_cnt;
2743
2744         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2745         nvmewqe = ctxp->wqeq;
2746         if (nvmewqe == NULL) {
2747                 /* Allocate buffer for  command wqe */
2748                 nvmewqe = ctxp->ctxbuf->iocbq;
2749                 if (nvmewqe == NULL) {
2750                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2751                                         "6110 NVMET prep FCP wqe: No "
2752                                         "WQE: NPORT x%x oxid x%x ste %d\n",
2753                                         ctxp->sid, ctxp->oxid, ctxp->state);
2754                         return NULL;
2755                 }
2756                 ctxp->wqeq = nvmewqe;
2757                 xc = 0; /* create new XRI */
2758                 nvmewqe->sli4_lxritag = NO_XRI;
2759                 nvmewqe->sli4_xritag = NO_XRI;
2760         }
2761
2762         /* Sanity check */
2763         if (((ctxp->state == LPFC_NVME_STE_RCV) &&
2764             (ctxp->entry_cnt == 1)) ||
2765             (ctxp->state == LPFC_NVME_STE_DATA)) {
2766                 wqe = &nvmewqe->wqe;
2767         } else {
2768                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2769                                 "6111 Wrong state NVMET FCP: %d  cnt %d\n",
2770                                 ctxp->state, ctxp->entry_cnt);
2771                 return NULL;
2772         }
2773
2774         sgl  = (struct sli4_sge *)ctxp->ctxbuf->sglq->sgl;
2775         switch (rsp->op) {
2776         case NVMET_FCOP_READDATA:
2777         case NVMET_FCOP_READDATA_RSP:
2778                 /* From the tsend template, initialize words 7 - 11 */
2779                 memcpy(&wqe->words[7],
2780                        &lpfc_tsend_cmd_template.words[7],
2781                        sizeof(uint32_t) * 5);
2782
2783                 /* Words 0 - 2 : The first sg segment */
2784                 sgel = &rsp->sg[0];
2785                 physaddr = sg_dma_address(sgel);
2786                 wqe->fcp_tsend.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2787                 wqe->fcp_tsend.bde.tus.f.bdeSize = sg_dma_len(sgel);
2788                 wqe->fcp_tsend.bde.addrLow = cpu_to_le32(putPaddrLow(physaddr));
2789                 wqe->fcp_tsend.bde.addrHigh =
2790                         cpu_to_le32(putPaddrHigh(physaddr));
2791
2792                 /* Word 3 */
2793                 wqe->fcp_tsend.payload_offset_len = 0;
2794
2795                 /* Word 4 */
2796                 wqe->fcp_tsend.relative_offset = ctxp->offset;
2797
2798                 /* Word 5 */
2799                 wqe->fcp_tsend.reserved = 0;
2800
2801                 /* Word 6 */
2802                 bf_set(wqe_ctxt_tag, &wqe->fcp_tsend.wqe_com,
2803                        phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2804                 bf_set(wqe_xri_tag, &wqe->fcp_tsend.wqe_com,
2805                        nvmewqe->sli4_xritag);
2806
2807                 /* Word 7 - set ar later */
2808
2809                 /* Word 8 */
2810                 wqe->fcp_tsend.wqe_com.abort_tag = nvmewqe->iotag;
2811
2812                 /* Word 9 */
2813                 bf_set(wqe_reqtag, &wqe->fcp_tsend.wqe_com, nvmewqe->iotag);
2814                 bf_set(wqe_rcvoxid, &wqe->fcp_tsend.wqe_com, ctxp->oxid);
2815
2816                 /* Word 10 - set wqes later, in template xc=1 */
2817                 if (!xc)
2818                         bf_set(wqe_xc, &wqe->fcp_tsend.wqe_com, 0);
2819
2820                 /* Word 12 */
2821                 wqe->fcp_tsend.fcp_data_len = rsp->transfer_length;
2822
2823                 /* Setup 2 SKIP SGEs */
2824                 sgl->addr_hi = 0;
2825                 sgl->addr_lo = 0;
2826                 sgl->word2 = 0;
2827                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2828                 sgl->word2 = cpu_to_le32(sgl->word2);
2829                 sgl->sge_len = 0;
2830                 sgl++;
2831                 sgl->addr_hi = 0;
2832                 sgl->addr_lo = 0;
2833                 sgl->word2 = 0;
2834                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2835                 sgl->word2 = cpu_to_le32(sgl->word2);
2836                 sgl->sge_len = 0;
2837                 sgl++;
2838                 if (rsp->op == NVMET_FCOP_READDATA_RSP) {
2839                         atomic_inc(&tgtp->xmt_fcp_read_rsp);
2840
2841                         /* In template ar=1 wqes=0 sup=0 irsp=0 irsplen=0 */
2842
2843                         if (rsp->rsplen == LPFC_NVMET_SUCCESS_LEN) {
2844                                 if (ndlp->nlp_flag & NLP_SUPPRESS_RSP)
2845                                         bf_set(wqe_sup,
2846                                                &wqe->fcp_tsend.wqe_com, 1);
2847                         } else {
2848                                 bf_set(wqe_wqes, &wqe->fcp_tsend.wqe_com, 1);
2849                                 bf_set(wqe_irsp, &wqe->fcp_tsend.wqe_com, 1);
2850                                 bf_set(wqe_irsplen, &wqe->fcp_tsend.wqe_com,
2851                                        ((rsp->rsplen >> 2) - 1));
2852                                 memcpy(&wqe->words[16], rsp->rspaddr,
2853                                        rsp->rsplen);
2854                         }
2855                 } else {
2856                         atomic_inc(&tgtp->xmt_fcp_read);
2857
2858                         /* In template ar=1 wqes=0 sup=0 irsp=0 irsplen=0 */
2859                         bf_set(wqe_ar, &wqe->fcp_tsend.wqe_com, 0);
2860                 }
2861                 break;
2862
2863         case NVMET_FCOP_WRITEDATA:
2864                 /* From the treceive template, initialize words 3 - 11 */
2865                 memcpy(&wqe->words[3],
2866                        &lpfc_treceive_cmd_template.words[3],
2867                        sizeof(uint32_t) * 9);
2868
2869                 /* Words 0 - 2 : First SGE is skipped, set invalid BDE type */
2870                 wqe->fcp_treceive.bde.tus.f.bdeFlags = LPFC_SGE_TYPE_SKIP;
2871                 wqe->fcp_treceive.bde.tus.f.bdeSize = 0;
2872                 wqe->fcp_treceive.bde.addrLow = 0;
2873                 wqe->fcp_treceive.bde.addrHigh = 0;
2874
2875                 /* Word 4 */
2876                 wqe->fcp_treceive.relative_offset = ctxp->offset;
2877
2878                 /* Word 6 */
2879                 bf_set(wqe_ctxt_tag, &wqe->fcp_treceive.wqe_com,
2880                        phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2881                 bf_set(wqe_xri_tag, &wqe->fcp_treceive.wqe_com,
2882                        nvmewqe->sli4_xritag);
2883
2884                 /* Word 7 */
2885
2886                 /* Word 8 */
2887                 wqe->fcp_treceive.wqe_com.abort_tag = nvmewqe->iotag;
2888
2889                 /* Word 9 */
2890                 bf_set(wqe_reqtag, &wqe->fcp_treceive.wqe_com, nvmewqe->iotag);
2891                 bf_set(wqe_rcvoxid, &wqe->fcp_treceive.wqe_com, ctxp->oxid);
2892
2893                 /* Word 10 - in template xc=1 */
2894                 if (!xc)
2895                         bf_set(wqe_xc, &wqe->fcp_treceive.wqe_com, 0);
2896
2897                 /* Word 11 - check for pbde */
2898                 if (nsegs == 1 && phba->cfg_enable_pbde) {
2899                         use_pbde = true;
2900                         /* Word 11 - PBDE bit already preset by template */
2901                 } else {
2902                         /* Overwrite default template setting */
2903                         bf_set(wqe_pbde, &wqe->fcp_treceive.wqe_com, 0);
2904                 }
2905
2906                 /* Word 12 */
2907                 wqe->fcp_tsend.fcp_data_len = rsp->transfer_length;
2908
2909                 /* Setup 2 SKIP SGEs */
2910                 sgl->addr_hi = 0;
2911                 sgl->addr_lo = 0;
2912                 sgl->word2 = 0;
2913                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2914                 sgl->word2 = cpu_to_le32(sgl->word2);
2915                 sgl->sge_len = 0;
2916                 sgl++;
2917                 sgl->addr_hi = 0;
2918                 sgl->addr_lo = 0;
2919                 sgl->word2 = 0;
2920                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2921                 sgl->word2 = cpu_to_le32(sgl->word2);
2922                 sgl->sge_len = 0;
2923                 sgl++;
2924                 atomic_inc(&tgtp->xmt_fcp_write);
2925                 break;
2926
2927         case NVMET_FCOP_RSP:
2928                 /* From the treceive template, initialize words 4 - 11 */
2929                 memcpy(&wqe->words[4],
2930                        &lpfc_trsp_cmd_template.words[4],
2931                        sizeof(uint32_t) * 8);
2932
2933                 /* Words 0 - 2 */
2934                 physaddr = rsp->rspdma;
2935                 wqe->fcp_trsp.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2936                 wqe->fcp_trsp.bde.tus.f.bdeSize = rsp->rsplen;
2937                 wqe->fcp_trsp.bde.addrLow =
2938                         cpu_to_le32(putPaddrLow(physaddr));
2939                 wqe->fcp_trsp.bde.addrHigh =
2940                         cpu_to_le32(putPaddrHigh(physaddr));
2941
2942                 /* Word 3 */
2943                 wqe->fcp_trsp.response_len = rsp->rsplen;
2944
2945                 /* Word 6 */
2946                 bf_set(wqe_ctxt_tag, &wqe->fcp_trsp.wqe_com,
2947                        phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2948                 bf_set(wqe_xri_tag, &wqe->fcp_trsp.wqe_com,
2949                        nvmewqe->sli4_xritag);
2950
2951                 /* Word 7 */
2952
2953                 /* Word 8 */
2954                 wqe->fcp_trsp.wqe_com.abort_tag = nvmewqe->iotag;
2955
2956                 /* Word 9 */
2957                 bf_set(wqe_reqtag, &wqe->fcp_trsp.wqe_com, nvmewqe->iotag);
2958                 bf_set(wqe_rcvoxid, &wqe->fcp_trsp.wqe_com, ctxp->oxid);
2959
2960                 /* Word 10 */
2961                 if (xc)
2962                         bf_set(wqe_xc, &wqe->fcp_trsp.wqe_com, 1);
2963
2964                 /* Word 11 */
2965                 /* In template wqes=0 irsp=0 irsplen=0 - good response */
2966                 if (rsp->rsplen != LPFC_NVMET_SUCCESS_LEN) {
2967                         /* Bad response - embed it */
2968                         bf_set(wqe_wqes, &wqe->fcp_trsp.wqe_com, 1);
2969                         bf_set(wqe_irsp, &wqe->fcp_trsp.wqe_com, 1);
2970                         bf_set(wqe_irsplen, &wqe->fcp_trsp.wqe_com,
2971                                ((rsp->rsplen >> 2) - 1));
2972                         memcpy(&wqe->words[16], rsp->rspaddr, rsp->rsplen);
2973                 }
2974
2975                 /* Word 12 */
2976                 wqe->fcp_trsp.rsvd_12_15[0] = 0;
2977
2978                 /* Use rspbuf, NOT sg list */
2979                 nsegs = 0;
2980                 sgl->word2 = 0;
2981                 atomic_inc(&tgtp->xmt_fcp_rsp);
2982                 break;
2983
2984         default:
2985                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
2986                                 "6064 Unknown Rsp Op %d\n",
2987                                 rsp->op);
2988                 return NULL;
2989         }
2990
2991         nvmewqe->retry = 1;
2992         nvmewqe->vport = phba->pport;
2993         nvmewqe->drvrTimeout = (phba->fc_ratov * 3) + LPFC_DRVR_TIMEOUT;
2994         nvmewqe->ndlp = ndlp;
2995
2996         for_each_sg(rsp->sg, sgel, nsegs, i) {
2997                 physaddr = sg_dma_address(sgel);
2998                 cnt = sg_dma_len(sgel);
2999                 sgl->addr_hi = putPaddrHigh(physaddr);
3000                 sgl->addr_lo = putPaddrLow(physaddr);
3001                 sgl->word2 = 0;
3002                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
3003                 bf_set(lpfc_sli4_sge_offset, sgl, ctxp->offset);
3004                 if ((i+1) == rsp->sg_cnt)
3005                         bf_set(lpfc_sli4_sge_last, sgl, 1);
3006                 sgl->word2 = cpu_to_le32(sgl->word2);
3007                 sgl->sge_len = cpu_to_le32(cnt);
3008                 sgl++;
3009                 ctxp->offset += cnt;
3010         }
3011
3012         bde = (struct ulp_bde64 *)&wqe->words[13];
3013         if (use_pbde) {
3014                 /* decrement sgl ptr backwards once to first data sge */
3015                 sgl--;
3016
3017                 /* Words 13-15 (PBDE) */
3018                 bde->addrLow = sgl->addr_lo;
3019                 bde->addrHigh = sgl->addr_hi;
3020                 bde->tus.f.bdeSize = le32_to_cpu(sgl->sge_len);
3021                 bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
3022                 bde->tus.w = cpu_to_le32(bde->tus.w);
3023         } else {
3024                 memset(bde, 0, sizeof(struct ulp_bde64));
3025         }
3026         ctxp->state = LPFC_NVME_STE_DATA;
3027         ctxp->entry_cnt++;
3028         return nvmewqe;
3029 }
3030
3031 /**
3032  * lpfc_nvmet_sol_fcp_abort_cmp - Completion handler for ABTS
3033  * @phba: Pointer to HBA context object.
3034  * @cmdwqe: Pointer to driver command WQE object.
3035  * @rspwqe: Pointer to driver response WQE object.
3036  *
3037  * The function is called from SLI ring event handler with no
3038  * lock held. This function is the completion handler for NVME ABTS for FCP cmds
3039  * The function frees memory resources used for the NVME commands.
3040  **/
3041 static void
3042 lpfc_nvmet_sol_fcp_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3043                              struct lpfc_iocbq *rspwqe)
3044 {
3045         struct lpfc_async_xchg_ctx *ctxp;
3046         struct lpfc_nvmet_tgtport *tgtp;
3047         uint32_t result;
3048         unsigned long flags;
3049         bool released = false;
3050         struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
3051
3052         ctxp = cmdwqe->context_un.axchg;
3053         result = wcqe->parameter;
3054
3055         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3056         if (ctxp->flag & LPFC_NVME_ABORT_OP)
3057                 atomic_inc(&tgtp->xmt_fcp_abort_cmpl);
3058
3059         spin_lock_irqsave(&ctxp->ctxlock, flags);
3060         ctxp->state = LPFC_NVME_STE_DONE;
3061
3062         /* Check if we already received a free context call
3063          * and we have completed processing an abort situation.
3064          */
3065         if ((ctxp->flag & LPFC_NVME_CTX_RLS) &&
3066             !(ctxp->flag & LPFC_NVME_XBUSY)) {
3067                 spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3068                 list_del_init(&ctxp->list);
3069                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3070                 released = true;
3071         }
3072         ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3073         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3074         atomic_inc(&tgtp->xmt_abort_rsp);
3075
3076         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3077                         "6165 ABORT cmpl: oxid x%x flg x%x (%d) "
3078                         "WCQE: %08x %08x %08x %08x\n",
3079                         ctxp->oxid, ctxp->flag, released,
3080                         wcqe->word0, wcqe->total_data_placed,
3081                         result, wcqe->word3);
3082
3083         cmdwqe->rsp_dmabuf = NULL;
3084         cmdwqe->bpl_dmabuf = NULL;
3085         /*
3086          * if transport has released ctx, then can reuse it. Otherwise,
3087          * will be recycled by transport release call.
3088          */
3089         if (released)
3090                 lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
3091
3092         /* This is the iocbq for the abort, not the command */
3093         lpfc_sli_release_iocbq(phba, cmdwqe);
3094
3095         /* Since iaab/iaar are NOT set, there is no work left.
3096          * For LPFC_NVME_XBUSY, lpfc_sli4_nvmet_xri_aborted
3097          * should have been called already.
3098          */
3099 }
3100
3101 /**
3102  * lpfc_nvmet_unsol_fcp_abort_cmp - Completion handler for ABTS
3103  * @phba: Pointer to HBA context object.
3104  * @cmdwqe: Pointer to driver command WQE object.
3105  * @rspwqe: Pointer to driver response WQE object.
3106  *
3107  * The function is called from SLI ring event handler with no
3108  * lock held. This function is the completion handler for NVME ABTS for FCP cmds
3109  * The function frees memory resources used for the NVME commands.
3110  **/
3111 static void
3112 lpfc_nvmet_unsol_fcp_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3113                                struct lpfc_iocbq *rspwqe)
3114 {
3115         struct lpfc_async_xchg_ctx *ctxp;
3116         struct lpfc_nvmet_tgtport *tgtp;
3117         unsigned long flags;
3118         uint32_t result;
3119         bool released = false;
3120         struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
3121
3122         ctxp = cmdwqe->context_un.axchg;
3123         result = wcqe->parameter;
3124
3125         if (!ctxp) {
3126                 /* if context is clear, related io alrady complete */
3127                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3128                                 "6070 ABTS cmpl: WCQE: %08x %08x %08x %08x\n",
3129                                 wcqe->word0, wcqe->total_data_placed,
3130                                 result, wcqe->word3);
3131                 return;
3132         }
3133
3134         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3135         spin_lock_irqsave(&ctxp->ctxlock, flags);
3136         if (ctxp->flag & LPFC_NVME_ABORT_OP)
3137                 atomic_inc(&tgtp->xmt_fcp_abort_cmpl);
3138
3139         /* Sanity check */
3140         if (ctxp->state != LPFC_NVME_STE_ABORT) {
3141                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3142                                 "6112 ABTS Wrong state:%d oxid x%x\n",
3143                                 ctxp->state, ctxp->oxid);
3144         }
3145
3146         /* Check if we already received a free context call
3147          * and we have completed processing an abort situation.
3148          */
3149         ctxp->state = LPFC_NVME_STE_DONE;
3150         if ((ctxp->flag & LPFC_NVME_CTX_RLS) &&
3151             !(ctxp->flag & LPFC_NVME_XBUSY)) {
3152                 spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3153                 list_del_init(&ctxp->list);
3154                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3155                 released = true;
3156         }
3157         ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3158         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3159         atomic_inc(&tgtp->xmt_abort_rsp);
3160
3161         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3162                         "6316 ABTS cmpl oxid x%x flg x%x (%x) "
3163                         "WCQE: %08x %08x %08x %08x\n",
3164                         ctxp->oxid, ctxp->flag, released,
3165                         wcqe->word0, wcqe->total_data_placed,
3166                         result, wcqe->word3);
3167
3168         cmdwqe->rsp_dmabuf = NULL;
3169         cmdwqe->bpl_dmabuf = NULL;
3170         /*
3171          * if transport has released ctx, then can reuse it. Otherwise,
3172          * will be recycled by transport release call.
3173          */
3174         if (released)
3175                 lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
3176
3177         /* Since iaab/iaar are NOT set, there is no work left.
3178          * For LPFC_NVME_XBUSY, lpfc_sli4_nvmet_xri_aborted
3179          * should have been called already.
3180          */
3181 }
3182
3183 /**
3184  * lpfc_nvmet_xmt_ls_abort_cmp - Completion handler for ABTS
3185  * @phba: Pointer to HBA context object.
3186  * @cmdwqe: Pointer to driver command WQE object.
3187  * @rspwqe: Pointer to driver response WQE object.
3188  *
3189  * The function is called from SLI ring event handler with no
3190  * lock held. This function is the completion handler for NVME ABTS for LS cmds
3191  * The function frees memory resources used for the NVME commands.
3192  **/
3193 static void
3194 lpfc_nvmet_xmt_ls_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3195                             struct lpfc_iocbq *rspwqe)
3196 {
3197         struct lpfc_async_xchg_ctx *ctxp;
3198         struct lpfc_nvmet_tgtport *tgtp;
3199         uint32_t result;
3200         struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
3201
3202         ctxp = cmdwqe->context_un.axchg;
3203         result = wcqe->parameter;
3204
3205         if (phba->nvmet_support) {
3206                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3207                 atomic_inc(&tgtp->xmt_ls_abort_cmpl);
3208         }
3209
3210         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3211                         "6083 Abort cmpl: ctx x%px WCQE:%08x %08x %08x %08x\n",
3212                         ctxp, wcqe->word0, wcqe->total_data_placed,
3213                         result, wcqe->word3);
3214
3215         if (!ctxp) {
3216                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3217                                 "6415 NVMET LS Abort No ctx: WCQE: "
3218                                  "%08x %08x %08x %08x\n",
3219                                 wcqe->word0, wcqe->total_data_placed,
3220                                 result, wcqe->word3);
3221
3222                 lpfc_sli_release_iocbq(phba, cmdwqe);
3223                 return;
3224         }
3225
3226         if (ctxp->state != LPFC_NVME_STE_LS_ABORT) {
3227                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3228                                 "6416 NVMET LS abort cmpl state mismatch: "
3229                                 "oxid x%x: %d %d\n",
3230                                 ctxp->oxid, ctxp->state, ctxp->entry_cnt);
3231         }
3232
3233         cmdwqe->rsp_dmabuf = NULL;
3234         cmdwqe->bpl_dmabuf = NULL;
3235         lpfc_sli_release_iocbq(phba, cmdwqe);
3236         kfree(ctxp);
3237 }
3238
3239 static int
3240 lpfc_nvmet_unsol_issue_abort(struct lpfc_hba *phba,
3241                              struct lpfc_async_xchg_ctx *ctxp,
3242                              uint32_t sid, uint16_t xri)
3243 {
3244         struct lpfc_nvmet_tgtport *tgtp = NULL;
3245         struct lpfc_iocbq *abts_wqeq;
3246         union lpfc_wqe128 *wqe_abts;
3247         struct lpfc_nodelist *ndlp;
3248
3249         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3250                         "6067 ABTS: sid %x xri x%x/x%x\n",
3251                         sid, xri, ctxp->wqeq->sli4_xritag);
3252
3253         if (phba->nvmet_support && phba->targetport)
3254                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3255
3256         ndlp = lpfc_findnode_did(phba->pport, sid);
3257         if (!ndlp ||
3258             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
3259             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
3260                 if (tgtp)
3261                         atomic_inc(&tgtp->xmt_abort_rsp_error);
3262                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3263                                 "6134 Drop ABTS - wrong NDLP state x%x.\n",
3264                                 (ndlp) ? ndlp->nlp_state : NLP_STE_MAX_STATE);
3265
3266                 /* No failure to an ABTS request. */
3267                 return 0;
3268         }
3269
3270         abts_wqeq = ctxp->wqeq;
3271         wqe_abts = &abts_wqeq->wqe;
3272
3273         /*
3274          * Since we zero the whole WQE, we need to ensure we set the WQE fields
3275          * that were initialized in lpfc_sli4_nvmet_alloc.
3276          */
3277         memset(wqe_abts, 0, sizeof(union lpfc_wqe));
3278
3279         /* Word 5 */
3280         bf_set(wqe_dfctl, &wqe_abts->xmit_sequence.wge_ctl, 0);
3281         bf_set(wqe_ls, &wqe_abts->xmit_sequence.wge_ctl, 1);
3282         bf_set(wqe_la, &wqe_abts->xmit_sequence.wge_ctl, 0);
3283         bf_set(wqe_rctl, &wqe_abts->xmit_sequence.wge_ctl, FC_RCTL_BA_ABTS);
3284         bf_set(wqe_type, &wqe_abts->xmit_sequence.wge_ctl, FC_TYPE_BLS);
3285
3286         /* Word 6 */
3287         bf_set(wqe_ctxt_tag, &wqe_abts->xmit_sequence.wqe_com,
3288                phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
3289         bf_set(wqe_xri_tag, &wqe_abts->xmit_sequence.wqe_com,
3290                abts_wqeq->sli4_xritag);
3291
3292         /* Word 7 */
3293         bf_set(wqe_cmnd, &wqe_abts->xmit_sequence.wqe_com,
3294                CMD_XMIT_SEQUENCE64_WQE);
3295         bf_set(wqe_ct, &wqe_abts->xmit_sequence.wqe_com, SLI4_CT_RPI);
3296         bf_set(wqe_class, &wqe_abts->xmit_sequence.wqe_com, CLASS3);
3297         bf_set(wqe_pu, &wqe_abts->xmit_sequence.wqe_com, 0);
3298
3299         /* Word 8 */
3300         wqe_abts->xmit_sequence.wqe_com.abort_tag = abts_wqeq->iotag;
3301
3302         /* Word 9 */
3303         bf_set(wqe_reqtag, &wqe_abts->xmit_sequence.wqe_com, abts_wqeq->iotag);
3304         /* Needs to be set by caller */
3305         bf_set(wqe_rcvoxid, &wqe_abts->xmit_sequence.wqe_com, xri);
3306
3307         /* Word 10 */
3308         bf_set(wqe_iod, &wqe_abts->xmit_sequence.wqe_com, LPFC_WQE_IOD_WRITE);
3309         bf_set(wqe_lenloc, &wqe_abts->xmit_sequence.wqe_com,
3310                LPFC_WQE_LENLOC_WORD12);
3311         bf_set(wqe_ebde_cnt, &wqe_abts->xmit_sequence.wqe_com, 0);
3312         bf_set(wqe_qosd, &wqe_abts->xmit_sequence.wqe_com, 0);
3313
3314         /* Word 11 */
3315         bf_set(wqe_cqid, &wqe_abts->xmit_sequence.wqe_com,
3316                LPFC_WQE_CQ_ID_DEFAULT);
3317         bf_set(wqe_cmd_type, &wqe_abts->xmit_sequence.wqe_com,
3318                OTHER_COMMAND);
3319
3320         abts_wqeq->vport = phba->pport;
3321         abts_wqeq->ndlp = ndlp;
3322         abts_wqeq->context_un.axchg = ctxp;
3323         abts_wqeq->bpl_dmabuf = NULL;
3324         abts_wqeq->num_bdes = 0;
3325         /* hba_wqidx should already be setup from command we are aborting */
3326         abts_wqeq->iocb.ulpCommand = CMD_XMIT_SEQUENCE64_CR;
3327         abts_wqeq->iocb.ulpLe = 1;
3328
3329         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3330                         "6069 Issue ABTS to xri x%x reqtag x%x\n",
3331                         xri, abts_wqeq->iotag);
3332         return 1;
3333 }
3334
3335 static int
3336 lpfc_nvmet_sol_fcp_issue_abort(struct lpfc_hba *phba,
3337                                struct lpfc_async_xchg_ctx *ctxp,
3338                                uint32_t sid, uint16_t xri)
3339 {
3340         struct lpfc_nvmet_tgtport *tgtp;
3341         struct lpfc_iocbq *abts_wqeq;
3342         struct lpfc_nodelist *ndlp;
3343         unsigned long flags;
3344         bool ia;
3345         int rc;
3346
3347         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3348         if (!ctxp->wqeq) {
3349                 ctxp->wqeq = ctxp->ctxbuf->iocbq;
3350                 ctxp->wqeq->hba_wqidx = 0;
3351         }
3352
3353         ndlp = lpfc_findnode_did(phba->pport, sid);
3354         if (!ndlp ||
3355             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
3356             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
3357                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3358                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3359                                 "6160 Drop ABORT - wrong NDLP state x%x.\n",
3360                                 (ndlp) ? ndlp->nlp_state : NLP_STE_MAX_STATE);
3361
3362                 /* No failure to an ABTS request. */
3363                 spin_lock_irqsave(&ctxp->ctxlock, flags);
3364                 ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3365                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3366                 return 0;
3367         }
3368
3369         /* Issue ABTS for this WQE based on iotag */
3370         ctxp->abort_wqeq = lpfc_sli_get_iocbq(phba);
3371         spin_lock_irqsave(&ctxp->ctxlock, flags);
3372         if (!ctxp->abort_wqeq) {
3373                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3374                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3375                                 "6161 ABORT failed: No wqeqs: "
3376                                 "xri: x%x\n", ctxp->oxid);
3377                 /* No failure to an ABTS request. */
3378                 ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3379                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3380                 return 0;
3381         }
3382         abts_wqeq = ctxp->abort_wqeq;
3383         ctxp->state = LPFC_NVME_STE_ABORT;
3384         ia = (ctxp->flag & LPFC_NVME_ABTS_RCV) ? true : false;
3385         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3386
3387         /* Announce entry to new IO submit field. */
3388         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3389                         "6162 ABORT Request to rport DID x%06x "
3390                         "for xri x%x x%x\n",
3391                         ctxp->sid, ctxp->oxid, ctxp->wqeq->sli4_xritag);
3392
3393         /* If the hba is getting reset, this flag is set.  It is
3394          * cleared when the reset is complete and rings reestablished.
3395          */
3396         spin_lock_irqsave(&phba->hbalock, flags);
3397         /* driver queued commands are in process of being flushed */
3398         if (phba->hba_flag & HBA_IOQ_FLUSH) {
3399                 spin_unlock_irqrestore(&phba->hbalock, flags);
3400                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3401                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3402                                 "6163 Driver in reset cleanup - flushing "
3403                                 "NVME Req now. hba_flag x%x oxid x%x\n",
3404                                 phba->hba_flag, ctxp->oxid);
3405                 lpfc_sli_release_iocbq(phba, abts_wqeq);
3406                 spin_lock_irqsave(&ctxp->ctxlock, flags);
3407                 ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3408                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3409                 return 0;
3410         }
3411
3412         /* Outstanding abort is in progress */
3413         if (abts_wqeq->cmd_flag & LPFC_DRIVER_ABORTED) {
3414                 spin_unlock_irqrestore(&phba->hbalock, flags);
3415                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3416                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3417                                 "6164 Outstanding NVME I/O Abort Request "
3418                                 "still pending on oxid x%x\n",
3419                                 ctxp->oxid);
3420                 lpfc_sli_release_iocbq(phba, abts_wqeq);
3421                 spin_lock_irqsave(&ctxp->ctxlock, flags);
3422                 ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3423                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3424                 return 0;
3425         }
3426
3427         /* Ready - mark outstanding as aborted by driver. */
3428         abts_wqeq->cmd_flag |= LPFC_DRIVER_ABORTED;
3429
3430         lpfc_sli_prep_abort_xri(phba, abts_wqeq, ctxp->wqeq->sli4_xritag,
3431                                 abts_wqeq->iotag, CLASS3,
3432                                 LPFC_WQE_CQ_ID_DEFAULT, ia, true);
3433
3434         /* ABTS WQE must go to the same WQ as the WQE to be aborted */
3435         abts_wqeq->hba_wqidx = ctxp->wqeq->hba_wqidx;
3436         abts_wqeq->cmd_cmpl = lpfc_nvmet_sol_fcp_abort_cmp;
3437         abts_wqeq->cmd_flag |= LPFC_IO_NVME;
3438         abts_wqeq->context_un.axchg = ctxp;
3439         abts_wqeq->vport = phba->pport;
3440         if (!ctxp->hdwq)
3441                 ctxp->hdwq = &phba->sli4_hba.hdwq[abts_wqeq->hba_wqidx];
3442
3443         rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, abts_wqeq);
3444         spin_unlock_irqrestore(&phba->hbalock, flags);
3445         if (rc == WQE_SUCCESS) {
3446                 atomic_inc(&tgtp->xmt_abort_sol);
3447                 return 0;
3448         }
3449
3450         atomic_inc(&tgtp->xmt_abort_rsp_error);
3451         spin_lock_irqsave(&ctxp->ctxlock, flags);
3452         ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3453         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3454         lpfc_sli_release_iocbq(phba, abts_wqeq);
3455         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3456                         "6166 Failed ABORT issue_wqe with status x%x "
3457                         "for oxid x%x.\n",
3458                         rc, ctxp->oxid);
3459         return 1;
3460 }
3461
3462 static int
3463 lpfc_nvmet_unsol_fcp_issue_abort(struct lpfc_hba *phba,
3464                                  struct lpfc_async_xchg_ctx *ctxp,
3465                                  uint32_t sid, uint16_t xri)
3466 {
3467         struct lpfc_nvmet_tgtport *tgtp;
3468         struct lpfc_iocbq *abts_wqeq;
3469         unsigned long flags;
3470         bool released = false;
3471         int rc;
3472
3473         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3474         if (!ctxp->wqeq) {
3475                 ctxp->wqeq = ctxp->ctxbuf->iocbq;
3476                 ctxp->wqeq->hba_wqidx = 0;
3477         }
3478
3479         if (ctxp->state == LPFC_NVME_STE_FREE) {
3480                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3481                                 "6417 NVMET ABORT ctx freed %d %d oxid x%x\n",
3482                                 ctxp->state, ctxp->entry_cnt, ctxp->oxid);
3483                 rc = WQE_BUSY;
3484                 goto aerr;
3485         }
3486         ctxp->state = LPFC_NVME_STE_ABORT;
3487         ctxp->entry_cnt++;
3488         rc = lpfc_nvmet_unsol_issue_abort(phba, ctxp, sid, xri);
3489         if (rc == 0)
3490                 goto aerr;
3491
3492         spin_lock_irqsave(&phba->hbalock, flags);
3493         abts_wqeq = ctxp->wqeq;
3494         abts_wqeq->cmd_cmpl = lpfc_nvmet_unsol_fcp_abort_cmp;
3495         abts_wqeq->cmd_flag |= LPFC_IO_NVMET;
3496         if (!ctxp->hdwq)
3497                 ctxp->hdwq = &phba->sli4_hba.hdwq[abts_wqeq->hba_wqidx];
3498
3499         rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, abts_wqeq);
3500         spin_unlock_irqrestore(&phba->hbalock, flags);
3501         if (rc == WQE_SUCCESS) {
3502                 return 0;
3503         }
3504
3505 aerr:
3506         spin_lock_irqsave(&ctxp->ctxlock, flags);
3507         if (ctxp->flag & LPFC_NVME_CTX_RLS) {
3508                 spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3509                 list_del_init(&ctxp->list);
3510                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3511                 released = true;
3512         }
3513         ctxp->flag &= ~(LPFC_NVME_ABORT_OP | LPFC_NVME_CTX_RLS);
3514         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3515
3516         atomic_inc(&tgtp->xmt_abort_rsp_error);
3517         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3518                         "6135 Failed to Issue ABTS for oxid x%x. Status x%x "
3519                         "(%x)\n",
3520                         ctxp->oxid, rc, released);
3521         if (released)
3522                 lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
3523         return 1;
3524 }
3525
3526 /**
3527  * lpfc_nvme_unsol_ls_issue_abort - issue ABTS on an exchange received
3528  *        via async frame receive where the frame is not handled.
3529  * @phba: pointer to adapter structure
3530  * @ctxp: pointer to the asynchronously received received sequence
3531  * @sid: address of the remote port to send the ABTS to
3532  * @xri: oxid value to for the ABTS (other side's exchange id).
3533  **/
3534 int
3535 lpfc_nvme_unsol_ls_issue_abort(struct lpfc_hba *phba,
3536                                 struct lpfc_async_xchg_ctx *ctxp,
3537                                 uint32_t sid, uint16_t xri)
3538 {
3539         struct lpfc_nvmet_tgtport *tgtp = NULL;
3540         struct lpfc_iocbq *abts_wqeq;
3541         unsigned long flags;
3542         int rc;
3543
3544         if ((ctxp->state == LPFC_NVME_STE_LS_RCV && ctxp->entry_cnt == 1) ||
3545             (ctxp->state == LPFC_NVME_STE_LS_RSP && ctxp->entry_cnt == 2)) {
3546                 ctxp->state = LPFC_NVME_STE_LS_ABORT;
3547                 ctxp->entry_cnt++;
3548         } else {
3549                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3550                                 "6418 NVMET LS abort state mismatch "
3551                                 "IO x%x: %d %d\n",
3552                                 ctxp->oxid, ctxp->state, ctxp->entry_cnt);
3553                 ctxp->state = LPFC_NVME_STE_LS_ABORT;
3554         }
3555
3556         if (phba->nvmet_support && phba->targetport)
3557                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3558
3559         if (!ctxp->wqeq) {
3560                 /* Issue ABTS for this WQE based on iotag */
3561                 ctxp->wqeq = lpfc_sli_get_iocbq(phba);
3562                 if (!ctxp->wqeq) {
3563                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3564                                         "6068 Abort failed: No wqeqs: "
3565                                         "xri: x%x\n", xri);
3566                         /* No failure to an ABTS request. */
3567                         kfree(ctxp);
3568                         return 0;
3569                 }
3570         }
3571         abts_wqeq = ctxp->wqeq;
3572
3573         if (lpfc_nvmet_unsol_issue_abort(phba, ctxp, sid, xri) == 0) {
3574                 rc = WQE_BUSY;
3575                 goto out;
3576         }
3577
3578         spin_lock_irqsave(&phba->hbalock, flags);
3579         abts_wqeq->cmd_cmpl = lpfc_nvmet_xmt_ls_abort_cmp;
3580         abts_wqeq->cmd_flag |=  LPFC_IO_NVME_LS;
3581         rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, abts_wqeq);
3582         spin_unlock_irqrestore(&phba->hbalock, flags);
3583         if (rc == WQE_SUCCESS) {
3584                 if (tgtp)
3585                         atomic_inc(&tgtp->xmt_abort_unsol);
3586                 return 0;
3587         }
3588 out:
3589         if (tgtp)
3590                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3591         abts_wqeq->rsp_dmabuf = NULL;
3592         abts_wqeq->bpl_dmabuf = NULL;
3593         lpfc_sli_release_iocbq(phba, abts_wqeq);
3594         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3595                         "6056 Failed to Issue ABTS. Status x%x\n", rc);
3596         return 1;
3597 }
3598
3599 /**
3600  * lpfc_nvmet_invalidate_host
3601  *
3602  * @phba: pointer to the driver instance bound to an adapter port.
3603  * @ndlp: pointer to an lpfc_nodelist type
3604  *
3605  * This routine upcalls the nvmet transport to invalidate an NVME
3606  * host to which this target instance had active connections.
3607  */
3608 void
3609 lpfc_nvmet_invalidate_host(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
3610 {
3611         u32 ndlp_has_hh;
3612         struct lpfc_nvmet_tgtport *tgtp;
3613
3614         lpfc_printf_log(phba, KERN_INFO,
3615                         LOG_NVME | LOG_NVME_ABTS | LOG_NVME_DISC,
3616                         "6203 Invalidating hosthandle x%px\n",
3617                         ndlp);
3618
3619         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3620         atomic_set(&tgtp->state, LPFC_NVMET_INV_HOST_ACTIVE);
3621
3622         spin_lock_irq(&ndlp->lock);
3623         ndlp_has_hh = ndlp->fc4_xpt_flags & NLP_XPT_HAS_HH;
3624         spin_unlock_irq(&ndlp->lock);
3625
3626         /* Do not invalidate any nodes that do not have a hosthandle.
3627          * The host_release callbk will cause a node reference
3628          * count imbalance and a crash.
3629          */
3630         if (!ndlp_has_hh) {
3631                 lpfc_printf_log(phba, KERN_INFO,
3632                                 LOG_NVME | LOG_NVME_ABTS | LOG_NVME_DISC,
3633                                 "6204 Skip invalidate on node x%px DID x%x\n",
3634                                 ndlp, ndlp->nlp_DID);
3635                 return;
3636         }
3637
3638 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
3639         /* Need to get the nvmet_fc_target_port pointer here.*/
3640         nvmet_fc_invalidate_host(phba->targetport, ndlp);
3641 #endif
3642 }