drivers/scsi/lpfc/lpfc_nvmet.c

   1 /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Fibre Channsel Host Bus Adapters.                               *
   4  * Copyright (C) 2017-2019 Broadcom. All Rights Reserved. The term *
   5  * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.     *
   6  * Copyright (C) 2004-2016 Emulex.  All rights reserved.           *
   7  * EMULEX and SLI are trademarks of Emulex.                        *
   8  * www.broadcom.com                                                *
   9  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
  10  *                                                                 *
  11  * This program is free software; you can redistribute it and/or   *
  12  * modify it under the terms of version 2 of the GNU General       *
  13  * Public License as published by the Free Software Foundation.    *
  14  * This program is distributed in the hope that it will be useful. *
  15  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  16  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  17  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  18  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  19  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  20  * more details, a copy of which can be found in the file COPYING  *
  21  * included with this package.                                     *
  22  ********************************************************************/
  23 #include <linux/pci.h>
  24 #include <linux/slab.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/delay.h>
  27 #include <asm/unaligned.h>
  28 #include <linux/crc-t10dif.h>
  29 #include <net/checksum.h>
  30
  31 #include <scsi/scsi.h>
  32 #include <scsi/scsi_device.h>
  33 #include <scsi/scsi_eh.h>
  34 #include <scsi/scsi_host.h>
  35 #include <scsi/scsi_tcq.h>
  36 #include <scsi/scsi_transport_fc.h>
  37 #include <scsi/fc/fc_fs.h>
  38
  39 #include "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_nvme, &wqe->fcp_tsend.wqe_com, 1);
 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_nvme, &wqe->fcp_treceive.wqe_com, 1);
 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_nvme, &wqe->fcp_trsp.wqe_com, 1);
 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  * @wcqe: Pointer to driver response CQE 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_wcqe_complete *wcqe)
 297 {
 298         struct lpfc_async_xchg_ctx *axchg = cmdwqe->context2;
 299         struct nvmefc_ls_rsp *ls_rsp = &axchg->ls_rsp;
 300         uint32_t status, result;
 301
 302         status = bf_get(lpfc_wcqe_c_status, wcqe) & LPFC_IOCB_STATUS_MASK;
 303         result = wcqe->parameter;
 304
 305         if (axchg->state != LPFC_NVME_STE_LS_RSP || axchg->entry_cnt != 2) {
 306                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 307                                 "6410 NVMEx LS cmpl state mismatch IO x%x: "
 308                                 "%d %d\n",
 309                                 axchg->oxid, axchg->state, axchg->entry_cnt);
 310         }
 311
 312         lpfc_nvmeio_data(phba, "NVMEx LS  CMPL: xri x%x stat x%x result x%x\n",
 313                          axchg->oxid, status, result);
 314
 315         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
 316                         "6038 NVMEx LS rsp cmpl: %d %d oxid x%x\n",
 317                         status, result, axchg->oxid);
 318
 319         lpfc_nlp_put(cmdwqe->context1);
 320         cmdwqe->context2 = NULL;
 321         cmdwqe->context3 = NULL;
 322         lpfc_sli_release_iocbq(phba, cmdwqe);
 323         ls_rsp->done(ls_rsp);
 324         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
 325                         "6200 NVMEx LS rsp cmpl done status %d oxid x%x\n",
 326                         status, axchg->oxid);
 327         kfree(axchg);
 328 }
 329
 330 /**
 331  * lpfc_nvmet_xmt_ls_rsp_cmp - Completion handler for LS Response
 332  * @phba: Pointer to HBA context object.
 333  * @cmdwqe: Pointer to driver command WQE object.
 334  * @wcqe: Pointer to driver response CQE object.
 335  *
 336  * The function is called from SLI ring event handler with no
 337  * lock held. This function is the completion handler for NVME LS commands
 338  * The function updates any states and statistics, then calls the
 339  * generic completion handler to free resources.
 340  **/
 341 static void
 342 lpfc_nvmet_xmt_ls_rsp_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
 343                           struct lpfc_wcqe_complete *wcqe)
 344 {
 345         struct lpfc_nvmet_tgtport *tgtp;
 346         uint32_t status, result;
 347
 348         if (!phba->targetport)
 349                 goto finish;
 350
 351         status = bf_get(lpfc_wcqe_c_status, wcqe) & LPFC_IOCB_STATUS_MASK;
 352         result = wcqe->parameter;
 353
 354         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
 355         if (tgtp) {
 356                 if (status) {
 357                         atomic_inc(&tgtp->xmt_ls_rsp_error);
 358                         if (result == IOERR_ABORT_REQUESTED)
 359                                 atomic_inc(&tgtp->xmt_ls_rsp_aborted);
 360                         if (bf_get(lpfc_wcqe_c_xb, wcqe))
 361                                 atomic_inc(&tgtp->xmt_ls_rsp_xb_set);
 362                 } else {
 363                         atomic_inc(&tgtp->xmt_ls_rsp_cmpl);
 364                 }
 365         }
 366
 367 finish:
 368         __lpfc_nvme_xmt_ls_rsp_cmp(phba, cmdwqe, wcqe);
 369 }
 370
 371 /**
 372  * lpfc_nvmet_ctxbuf_post - Repost a NVMET RQ DMA buffer and clean up context
 373  * @phba: HBA buffer is associated with
 374  * @ctxp: context to clean up
 375  * @mp: Buffer to free
 376  *
 377  * Description: Frees the given DMA buffer in the appropriate way given by
 378  * reposting it to its associated RQ so it can be reused.
 379  *
 380  * Notes: Takes phba->hbalock.  Can be called with or without other locks held.
 381  *
 382  * Returns: None
 383  **/
 384 void
 385 lpfc_nvmet_ctxbuf_post(struct lpfc_hba *phba, struct lpfc_nvmet_ctxbuf *ctx_buf)
 386 {
 387 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
 388         struct lpfc_async_xchg_ctx *ctxp = ctx_buf->context;
 389         struct lpfc_nvmet_tgtport *tgtp;
 390         struct fc_frame_header *fc_hdr;
 391         struct rqb_dmabuf *nvmebuf;
 392         struct lpfc_nvmet_ctx_info *infop;
 393         uint32_t size, oxid, sid;
 394         int cpu;
 395         unsigned long iflag;
 396
 397         if (ctxp->state == LPFC_NVME_STE_FREE) {
 398                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 399                                 "6411 NVMET free, already free IO x%x: %d %d\n",
 400                                 ctxp->oxid, ctxp->state, ctxp->entry_cnt);
 401         }
 402
 403         if (ctxp->rqb_buffer) {
 404                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
 405                 nvmebuf = ctxp->rqb_buffer;
 406                 /* check if freed in another path whilst acquiring lock */
 407                 if (nvmebuf) {
 408                         ctxp->rqb_buffer = NULL;
 409                         if (ctxp->flag & LPFC_NVME_CTX_REUSE_WQ) {
 410                                 ctxp->flag &= ~LPFC_NVME_CTX_REUSE_WQ;
 411                                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
 412                                 nvmebuf->hrq->rqbp->rqb_free_buffer(phba,
 413                                                                     nvmebuf);
 414                         } else {
 415                                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
 416                                 /* repost */
 417                                 lpfc_rq_buf_free(phba, &nvmebuf->hbuf);
 418                         }
 419                 } else {
 420                         spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
 421                 }
 422         }
 423         ctxp->state = LPFC_NVME_STE_FREE;
 424
 425         spin_lock_irqsave(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
 426         if (phba->sli4_hba.nvmet_io_wait_cnt) {
 427                 list_remove_head(&phba->sli4_hba.lpfc_nvmet_io_wait_list,
 428                                  nvmebuf, struct rqb_dmabuf,
 429                                  hbuf.list);
 430                 phba->sli4_hba.nvmet_io_wait_cnt--;
 431                 spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock,
 432                                        iflag);
 433
 434                 fc_hdr = (struct fc_frame_header *)(nvmebuf->hbuf.virt);
 435                 oxid = be16_to_cpu(fc_hdr->fh_ox_id);
 436                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
 437                 size = nvmebuf->bytes_recv;
 438                 sid = sli4_sid_from_fc_hdr(fc_hdr);
 439
 440                 ctxp = (struct lpfc_async_xchg_ctx *)ctx_buf->context;
 441                 ctxp->wqeq = NULL;
 442                 ctxp->offset = 0;
 443                 ctxp->phba = phba;
 444                 ctxp->size = size;
 445                 ctxp->oxid = oxid;
 446                 ctxp->sid = sid;
 447                 ctxp->state = LPFC_NVME_STE_RCV;
 448                 ctxp->entry_cnt = 1;
 449                 ctxp->flag = 0;
 450                 ctxp->ctxbuf = ctx_buf;
 451                 ctxp->rqb_buffer = (void *)nvmebuf;
 452                 spin_lock_init(&ctxp->ctxlock);
 453
 454 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 455                 /* NOTE: isr time stamp is stale when context is re-assigned*/
 456                 if (ctxp->ts_isr_cmd) {
 457                         ctxp->ts_cmd_nvme = 0;
 458                         ctxp->ts_nvme_data = 0;
 459                         ctxp->ts_data_wqput = 0;
 460                         ctxp->ts_isr_data = 0;
 461                         ctxp->ts_data_nvme = 0;
 462                         ctxp->ts_nvme_status = 0;
 463                         ctxp->ts_status_wqput = 0;
 464                         ctxp->ts_isr_status = 0;
 465                         ctxp->ts_status_nvme = 0;
 466                 }
 467 #endif
 468                 atomic_inc(&tgtp->rcv_fcp_cmd_in);
 469
 470                 /* Indicate that a replacement buffer has been posted */
 471                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
 472                 ctxp->flag |= LPFC_NVME_CTX_REUSE_WQ;
 473                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
 474
 475                 if (!queue_work(phba->wq, &ctx_buf->defer_work)) {
 476                         atomic_inc(&tgtp->rcv_fcp_cmd_drop);
 477                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 478                                         "6181 Unable to queue deferred work "
 479                                         "for oxid x%x. "
 480                                         "FCP Drop IO [x%x x%x x%x]\n",
 481                                         ctxp->oxid,
 482                                         atomic_read(&tgtp->rcv_fcp_cmd_in),
 483                                         atomic_read(&tgtp->rcv_fcp_cmd_out),
 484                                         atomic_read(&tgtp->xmt_fcp_release));
 485
 486                         spin_lock_irqsave(&ctxp->ctxlock, iflag);
 487                         lpfc_nvmet_defer_release(phba, ctxp);
 488                         spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
 489                         lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, sid, oxid);
 490                 }
 491                 return;
 492         }
 493         spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
 494
 495         /*
 496          * Use the CPU context list, from the MRQ the IO was received on
 497          * (ctxp->idx), to save context structure.
 498          */
 499         spin_lock_irqsave(&phba->sli4_hba.t_active_list_lock, iflag);
 500         list_del_init(&ctxp->list);
 501         spin_unlock_irqrestore(&phba->sli4_hba.t_active_list_lock, iflag);
 502         cpu = raw_smp_processor_id();
 503         infop = lpfc_get_ctx_list(phba, cpu, ctxp->idx);
 504         spin_lock_irqsave(&infop->nvmet_ctx_list_lock, iflag);
 505         list_add_tail(&ctx_buf->list, &infop->nvmet_ctx_list);
 506         infop->nvmet_ctx_list_cnt++;
 507         spin_unlock_irqrestore(&infop->nvmet_ctx_list_lock, iflag);
 508 #endif
 509 }
 510
 511 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 512 static void
 513 lpfc_nvmet_ktime(struct lpfc_hba *phba,
 514                  struct lpfc_async_xchg_ctx *ctxp)
 515 {
 516         uint64_t seg1, seg2, seg3, seg4, seg5;
 517         uint64_t seg6, seg7, seg8, seg9, seg10;
 518         uint64_t segsum;
 519
 520         if (!ctxp->ts_isr_cmd || !ctxp->ts_cmd_nvme ||
 521             !ctxp->ts_nvme_data || !ctxp->ts_data_wqput ||
 522             !ctxp->ts_isr_data || !ctxp->ts_data_nvme ||
 523             !ctxp->ts_nvme_status || !ctxp->ts_status_wqput ||
 524             !ctxp->ts_isr_status || !ctxp->ts_status_nvme)
 525                 return;
 526
 527         if (ctxp->ts_status_nvme < ctxp->ts_isr_cmd)
 528                 return;
 529         if (ctxp->ts_isr_cmd  > ctxp->ts_cmd_nvme)
 530                 return;
 531         if (ctxp->ts_cmd_nvme > ctxp->ts_nvme_data)
 532                 return;
 533         if (ctxp->ts_nvme_data > ctxp->ts_data_wqput)
 534                 return;
 535         if (ctxp->ts_data_wqput > ctxp->ts_isr_data)
 536                 return;
 537         if (ctxp->ts_isr_data > ctxp->ts_data_nvme)
 538                 return;
 539         if (ctxp->ts_data_nvme > ctxp->ts_nvme_status)
 540                 return;
 541         if (ctxp->ts_nvme_status > ctxp->ts_status_wqput)
 542                 return;
 543         if (ctxp->ts_status_wqput > ctxp->ts_isr_status)
 544                 return;
 545         if (ctxp->ts_isr_status > ctxp->ts_status_nvme)
 546                 return;
 547         /*
 548          * Segment 1 - Time from FCP command received by MSI-X ISR
 549          * to FCP command is passed to NVME Layer.
 550          * Segment 2 - Time from FCP command payload handed
 551          * off to NVME Layer to Driver receives a Command op
 552          * from NVME Layer.
 553          * Segment 3 - Time from Driver receives a Command op
 554          * from NVME Layer to Command is put on WQ.
 555          * Segment 4 - Time from Driver WQ put is done
 556          * to MSI-X ISR for Command cmpl.
 557          * Segment 5 - Time from MSI-X ISR for Command cmpl to
 558          * Command cmpl is passed to NVME Layer.
 559          * Segment 6 - Time from Command cmpl is passed to NVME
 560          * Layer to Driver receives a RSP op from NVME Layer.
 561          * Segment 7 - Time from Driver receives a RSP op from
 562          * NVME Layer to WQ put is done on TRSP FCP Status.
 563          * Segment 8 - Time from Driver WQ put is done on TRSP
 564          * FCP Status to MSI-X ISR for TRSP cmpl.
 565          * Segment 9 - Time from MSI-X ISR for TRSP cmpl to
 566          * TRSP cmpl is passed to NVME Layer.
 567          * Segment 10 - Time from FCP command received by
 568          * MSI-X ISR to command is completed on wire.
 569          * (Segments 1 thru 8) for READDATA / WRITEDATA
 570          * (Segments 1 thru 4) for READDATA_RSP
 571          */
 572         seg1 = ctxp->ts_cmd_nvme - ctxp->ts_isr_cmd;
 573         segsum = seg1;
 574
 575         seg2 = ctxp->ts_nvme_data - ctxp->ts_isr_cmd;
 576         if (segsum > seg2)
 577                 return;
 578         seg2 -= segsum;
 579         segsum += seg2;
 580
 581         seg3 = ctxp->ts_data_wqput - ctxp->ts_isr_cmd;
 582         if (segsum > seg3)
 583                 return;
 584         seg3 -= segsum;
 585         segsum += seg3;
 586
 587         seg4 = ctxp->ts_isr_data - ctxp->ts_isr_cmd;
 588         if (segsum > seg4)
 589                 return;
 590         seg4 -= segsum;
 591         segsum += seg4;
 592
 593         seg5 = ctxp->ts_data_nvme - ctxp->ts_isr_cmd;
 594         if (segsum > seg5)
 595                 return;
 596         seg5 -= segsum;
 597         segsum += seg5;
 598
 599
 600         /* For auto rsp commands seg6 thru seg10 will be 0 */
 601         if (ctxp->ts_nvme_status > ctxp->ts_data_nvme) {
 602                 seg6 = ctxp->ts_nvme_status - ctxp->ts_isr_cmd;
 603                 if (segsum > seg6)
 604                         return;
 605                 seg6 -= segsum;
 606                 segsum += seg6;
 607
 608                 seg7 = ctxp->ts_status_wqput - ctxp->ts_isr_cmd;
 609                 if (segsum > seg7)
 610                         return;
 611                 seg7 -= segsum;
 612                 segsum += seg7;
 613
 614                 seg8 = ctxp->ts_isr_status - ctxp->ts_isr_cmd;
 615                 if (segsum > seg8)
 616                         return;
 617                 seg8 -= segsum;
 618                 segsum += seg8;
 619
 620                 seg9 = ctxp->ts_status_nvme - ctxp->ts_isr_cmd;
 621                 if (segsum > seg9)
 622                         return;
 623                 seg9 -= segsum;
 624                 segsum += seg9;
 625
 626                 if (ctxp->ts_isr_status < ctxp->ts_isr_cmd)
 627                         return;
 628                 seg10 = (ctxp->ts_isr_status -
 629                         ctxp->ts_isr_cmd);
 630         } else {
 631                 if (ctxp->ts_isr_data < ctxp->ts_isr_cmd)
 632                         return;
 633                 seg6 =  0;
 634                 seg7 =  0;
 635                 seg8 =  0;
 636                 seg9 =  0;
 637                 seg10 = (ctxp->ts_isr_data - ctxp->ts_isr_cmd);
 638         }
 639
 640         phba->ktime_seg1_total += seg1;
 641         if (seg1 < phba->ktime_seg1_min)
 642                 phba->ktime_seg1_min = seg1;
 643         else if (seg1 > phba->ktime_seg1_max)
 644                 phba->ktime_seg1_max = seg1;
 645
 646         phba->ktime_seg2_total += seg2;
 647         if (seg2 < phba->ktime_seg2_min)
 648                 phba->ktime_seg2_min = seg2;
 649         else if (seg2 > phba->ktime_seg2_max)
 650                 phba->ktime_seg2_max = seg2;
 651
 652         phba->ktime_seg3_total += seg3;
 653         if (seg3 < phba->ktime_seg3_min)
 654                 phba->ktime_seg3_min = seg3;
 655         else if (seg3 > phba->ktime_seg3_max)
 656                 phba->ktime_seg3_max = seg3;
 657
 658         phba->ktime_seg4_total += seg4;
 659         if (seg4 < phba->ktime_seg4_min)
 660                 phba->ktime_seg4_min = seg4;
 661         else if (seg4 > phba->ktime_seg4_max)
 662                 phba->ktime_seg4_max = seg4;
 663
 664         phba->ktime_seg5_total += seg5;
 665         if (seg5 < phba->ktime_seg5_min)
 666                 phba->ktime_seg5_min = seg5;
 667         else if (seg5 > phba->ktime_seg5_max)
 668                 phba->ktime_seg5_max = seg5;
 669
 670         phba->ktime_data_samples++;
 671         if (!seg6)
 672                 goto out;
 673
 674         phba->ktime_seg6_total += seg6;
 675         if (seg6 < phba->ktime_seg6_min)
 676                 phba->ktime_seg6_min = seg6;
 677         else if (seg6 > phba->ktime_seg6_max)
 678                 phba->ktime_seg6_max = seg6;
 679
 680         phba->ktime_seg7_total += seg7;
 681         if (seg7 < phba->ktime_seg7_min)
 682                 phba->ktime_seg7_min = seg7;
 683         else if (seg7 > phba->ktime_seg7_max)
 684                 phba->ktime_seg7_max = seg7;
 685
 686         phba->ktime_seg8_total += seg8;
 687         if (seg8 < phba->ktime_seg8_min)
 688                 phba->ktime_seg8_min = seg8;
 689         else if (seg8 > phba->ktime_seg8_max)
 690                 phba->ktime_seg8_max = seg8;
 691
 692         phba->ktime_seg9_total += seg9;
 693         if (seg9 < phba->ktime_seg9_min)
 694                 phba->ktime_seg9_min = seg9;
 695         else if (seg9 > phba->ktime_seg9_max)
 696                 phba->ktime_seg9_max = seg9;
 697 out:
 698         phba->ktime_seg10_total += seg10;
 699         if (seg10 < phba->ktime_seg10_min)
 700                 phba->ktime_seg10_min = seg10;
 701         else if (seg10 > phba->ktime_seg10_max)
 702                 phba->ktime_seg10_max = seg10;
 703         phba->ktime_status_samples++;
 704 }
 705 #endif
 706
 707 /**
 708  * lpfc_nvmet_xmt_fcp_op_cmp - Completion handler for FCP Response
 709  * @phba: Pointer to HBA context object.
 710  * @cmdwqe: Pointer to driver command WQE object.
 711  * @wcqe: Pointer to driver response CQE object.
 712  *
 713  * The function is called from SLI ring event handler with no
 714  * lock held. This function is the completion handler for NVME FCP commands
 715  * The function frees memory resources used for the NVME commands.
 716  **/
 717 static void
 718 lpfc_nvmet_xmt_fcp_op_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
 719                           struct lpfc_wcqe_complete *wcqe)
 720 {
 721         struct lpfc_nvmet_tgtport *tgtp;
 722         struct nvmefc_tgt_fcp_req *rsp;
 723         struct lpfc_async_xchg_ctx *ctxp;
 724         uint32_t status, result, op, start_clean, logerr;
 725 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 726         int id;
 727 #endif
 728
 729         ctxp = cmdwqe->context2;
 730         ctxp->flag &= ~LPFC_NVME_IO_INP;
 731
 732         rsp = &ctxp->hdlrctx.fcp_req;
 733         op = rsp->op;
 734
 735         status = bf_get(lpfc_wcqe_c_status, wcqe);
 736         result = wcqe->parameter;
 737
 738         if (phba->targetport)
 739                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
 740         else
 741                 tgtp = NULL;
 742
 743         lpfc_nvmeio_data(phba, "NVMET FCP CMPL: xri x%x op x%x status x%x\n",
 744                          ctxp->oxid, op, status);
 745
 746         if (status) {
 747                 rsp->fcp_error = NVME_SC_DATA_XFER_ERROR;
 748                 rsp->transferred_length = 0;
 749                 if (tgtp) {
 750                         atomic_inc(&tgtp->xmt_fcp_rsp_error);
 751                         if (result == IOERR_ABORT_REQUESTED)
 752                                 atomic_inc(&tgtp->xmt_fcp_rsp_aborted);
 753                 }
 754
 755                 logerr = LOG_NVME_IOERR;
 756
 757                 /* pick up SLI4 exhange busy condition */
 758                 if (bf_get(lpfc_wcqe_c_xb, wcqe)) {
 759                         ctxp->flag |= LPFC_NVME_XBUSY;
 760                         logerr |= LOG_NVME_ABTS;
 761                         if (tgtp)
 762                                 atomic_inc(&tgtp->xmt_fcp_rsp_xb_set);
 763
 764                 } else {
 765                         ctxp->flag &= ~LPFC_NVME_XBUSY;
 766                 }
 767
 768                 lpfc_printf_log(phba, KERN_INFO, logerr,
 769                                 "6315 IO Error Cmpl oxid: x%x xri: x%x %x/%x "
 770                                 "XBUSY:x%x\n",
 771                                 ctxp->oxid, ctxp->ctxbuf->sglq->sli4_xritag,
 772                                 status, result, ctxp->flag);
 773
 774         } else {
 775                 rsp->fcp_error = NVME_SC_SUCCESS;
 776                 if (op == NVMET_FCOP_RSP)
 777                         rsp->transferred_length = rsp->rsplen;
 778                 else
 779                         rsp->transferred_length = rsp->transfer_length;
 780                 if (tgtp)
 781                         atomic_inc(&tgtp->xmt_fcp_rsp_cmpl);
 782         }
 783
 784         if ((op == NVMET_FCOP_READDATA_RSP) ||
 785             (op == NVMET_FCOP_RSP)) {
 786                 /* Sanity check */
 787                 ctxp->state = LPFC_NVME_STE_DONE;
 788                 ctxp->entry_cnt++;
 789
 790 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 791                 if (ctxp->ts_cmd_nvme) {
 792                         if (rsp->op == NVMET_FCOP_READDATA_RSP) {
 793                                 ctxp->ts_isr_data =
 794                                         cmdwqe->isr_timestamp;
 795                                 ctxp->ts_data_nvme =
 796                                         ktime_get_ns();
 797                                 ctxp->ts_nvme_status =
 798                                         ctxp->ts_data_nvme;
 799                                 ctxp->ts_status_wqput =
 800                                         ctxp->ts_data_nvme;
 801                                 ctxp->ts_isr_status =
 802                                         ctxp->ts_data_nvme;
 803                                 ctxp->ts_status_nvme =
 804                                         ctxp->ts_data_nvme;
 805                         } else {
 806                                 ctxp->ts_isr_status =
 807                                         cmdwqe->isr_timestamp;
 808                                 ctxp->ts_status_nvme =
 809                                         ktime_get_ns();
 810                         }
 811                 }
 812 #endif
 813                 rsp->done(rsp);
 814 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 815                 if (ctxp->ts_cmd_nvme)
 816                         lpfc_nvmet_ktime(phba, ctxp);
 817 #endif
 818                 /* lpfc_nvmet_xmt_fcp_release() will recycle the context */
 819         } else {
 820                 ctxp->entry_cnt++;
 821                 start_clean = offsetof(struct lpfc_iocbq, iocb_flag);
 822                 memset(((char *)cmdwqe) + start_clean, 0,
 823                        (sizeof(struct lpfc_iocbq) - start_clean));
 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_wcqe_complete *wcqe))
 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->rsvd2 = 1;
 903         nvmewqeq->hba_wqidx = 0;
 904         nvmewqeq->context3 = &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->wqe_cmpl = xmt_ls_rsp_cmp;
 918         nvmewqeq->iocb_cmpl = NULL;
 919         nvmewqeq->context2 = axchg;
 920
 921         lpfc_nvmeio_data(phba, "NVMEx LS RSP: xri x%x wqidx x%x len x%x\n",
 922                          axchg->oxid, nvmewqeq->hba_wqidx, ls_rsp->rsplen);
 923
 924         rc = lpfc_sli4_issue_wqe(phba, axchg->hdwq, nvmewqeq);
 925
 926         /* clear to be sure there's no reference */
 927         nvmewqeq->context3 = NULL;
 928
 929         if (rc == WQE_SUCCESS) {
 930                 /*
 931                  * Okay to repost buffer here, but wait till cmpl
 932                  * before freeing ctxp and iocbq.
 933                  */
 934                 lpfc_in_buf_free(phba, &nvmebuf->dbuf);
 935                 return 0;
 936         }
 937
 938         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 939                         "6151 NVMEx LS RSP x%x: failed to transmit %d\n",
 940                         axchg->oxid, rc);
 941
 942         rc = -ENXIO;
 943
 944         lpfc_nlp_put(nvmewqeq->context1);
 945
 946 out_free_buf:
 947         /* Give back resources */
 948         lpfc_in_buf_free(phba, &nvmebuf->dbuf);
 949
 950         /*
 951          * As transport doesn't track completions of responses, if the rsp
 952          * fails to send, the transport will effectively ignore the rsp
 953          * and consider the LS done. However, the driver has an active
 954          * exchange open for the LS - so be sure to abort the exchange
 955          * if the response isn't sent.
 956          */
 957         lpfc_nvme_unsol_ls_issue_abort(phba, axchg, axchg->sid, axchg->oxid);
 958         return rc;
 959 }
 960
 961 /**
 962  * lpfc_nvmet_xmt_ls_rsp - Transmit NVME LS response
 963  * @tgtport: pointer to target port that NVME LS is to be transmit from.
 964  * @ls_rsp: pointer to the transport LS RSP that is to be sent
 965  *
 966  * Driver registers this routine to transmit responses for received NVME
 967  * LS requests.
 968  *
 969  * This routine is used to format and send a WQE to transmit a NVME LS
 970  * Response. The ls_rsp is used to reverse-map the LS to the original
 971  * NVME LS request sequence, which provides addressing information for
 972  * the remote port the LS to be sent to, as well as the exchange id
 973  * that is the LS is bound to.
 974  *
 975  * Returns:
 976  *  0 : if response successfully transmit
 977  *  non-zero : if response failed to transmit, of the form -Exxx.
 978  **/
 979 static int
 980 lpfc_nvmet_xmt_ls_rsp(struct nvmet_fc_target_port *tgtport,
 981                       struct nvmefc_ls_rsp *ls_rsp)
 982 {
 983         struct lpfc_async_xchg_ctx *axchg =
 984                 container_of(ls_rsp, struct lpfc_async_xchg_ctx, ls_rsp);
 985         struct lpfc_nvmet_tgtport *nvmep = tgtport->private;
 986         int rc;
 987
 988         if (axchg->phba->pport->load_flag & FC_UNLOADING)
 989                 return -ENODEV;
 990
 991         rc = __lpfc_nvme_xmt_ls_rsp(axchg, ls_rsp, lpfc_nvmet_xmt_ls_rsp_cmp);
 992
 993         if (rc) {
 994                 atomic_inc(&nvmep->xmt_ls_drop);
 995                 /*
 996                  * unless the failure is due to having already sent
 997                  * the response, an abort will be generated for the
 998                  * exchange if the rsp can't be sent.
 999                  */
1000                 if (rc != -EALREADY)
1001                         atomic_inc(&nvmep->xmt_ls_abort);
1002                 return rc;
1003         }
1004
1005         atomic_inc(&nvmep->xmt_ls_rsp);
1006         return 0;
1007 }
1008
1009 static int
1010 lpfc_nvmet_xmt_fcp_op(struct nvmet_fc_target_port *tgtport,
1011                       struct nvmefc_tgt_fcp_req *rsp)
1012 {
1013         struct lpfc_nvmet_tgtport *lpfc_nvmep = tgtport->private;
1014         struct lpfc_async_xchg_ctx *ctxp =
1015                 container_of(rsp, struct lpfc_async_xchg_ctx, hdlrctx.fcp_req);
1016         struct lpfc_hba *phba = ctxp->phba;
1017         struct lpfc_queue *wq;
1018         struct lpfc_iocbq *nvmewqeq;
1019         struct lpfc_sli_ring *pring;
1020         unsigned long iflags;
1021         int rc;
1022 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1023         int id;
1024 #endif
1025
1026         if (phba->pport->load_flag & FC_UNLOADING) {
1027                 rc = -ENODEV;
1028                 goto aerr;
1029         }
1030
1031 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1032         if (ctxp->ts_cmd_nvme) {
1033                 if (rsp->op == NVMET_FCOP_RSP)
1034                         ctxp->ts_nvme_status = ktime_get_ns();
1035                 else
1036                         ctxp->ts_nvme_data = ktime_get_ns();
1037         }
1038
1039         /* Setup the hdw queue if not already set */
1040         if (!ctxp->hdwq)
1041                 ctxp->hdwq = &phba->sli4_hba.hdwq[rsp->hwqid];
1042
1043         if (phba->hdwqstat_on & LPFC_CHECK_NVMET_IO) {
1044                 id = raw_smp_processor_id();
1045                 this_cpu_inc(phba->sli4_hba.c_stat->xmt_io);
1046                 if (rsp->hwqid != id)
1047                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
1048                                         "6705 CPU Check OP: "
1049                                         "cpu %d expect %d\n",
1050                                         id, rsp->hwqid);
1051                 ctxp->cpu = id; /* Setup cpu for cmpl check */
1052         }
1053 #endif
1054
1055         /* Sanity check */
1056         if ((ctxp->flag & LPFC_NVME_ABTS_RCV) ||
1057             (ctxp->state == LPFC_NVME_STE_ABORT)) {
1058                 atomic_inc(&lpfc_nvmep->xmt_fcp_drop);
1059                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1060                                 "6102 IO oxid x%x aborted\n",
1061                                 ctxp->oxid);
1062                 rc = -ENXIO;
1063                 goto aerr;
1064         }
1065
1066         nvmewqeq = lpfc_nvmet_prep_fcp_wqe(phba, ctxp);
1067         if (nvmewqeq == NULL) {
1068                 atomic_inc(&lpfc_nvmep->xmt_fcp_drop);
1069                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1070                                 "6152 FCP Drop IO x%x: Prep\n",
1071                                 ctxp->oxid);
1072                 rc = -ENXIO;
1073                 goto aerr;
1074         }
1075
1076         nvmewqeq->wqe_cmpl = lpfc_nvmet_xmt_fcp_op_cmp;
1077         nvmewqeq->iocb_cmpl = NULL;
1078         nvmewqeq->context2 = ctxp;
1079         nvmewqeq->iocb_flag |=  LPFC_IO_NVMET;
1080         ctxp->wqeq->hba_wqidx = rsp->hwqid;
1081
1082         lpfc_nvmeio_data(phba, "NVMET FCP CMND: xri x%x op x%x len x%x\n",
1083                          ctxp->oxid, rsp->op, rsp->rsplen);
1084
1085         ctxp->flag |= LPFC_NVME_IO_INP;
1086         rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, nvmewqeq);
1087         if (rc == WQE_SUCCESS) {
1088 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1089                 if (!ctxp->ts_cmd_nvme)
1090                         return 0;
1091                 if (rsp->op == NVMET_FCOP_RSP)
1092                         ctxp->ts_status_wqput = ktime_get_ns();
1093                 else
1094                         ctxp->ts_data_wqput = ktime_get_ns();
1095 #endif
1096                 return 0;
1097         }
1098
1099         if (rc == -EBUSY) {
1100                 /*
1101                  * WQ was full, so queue nvmewqeq to be sent after
1102                  * WQE release CQE
1103                  */
1104                 ctxp->flag |= LPFC_NVME_DEFER_WQFULL;
1105                 wq = ctxp->hdwq->io_wq;
1106                 pring = wq->pring;
1107                 spin_lock_irqsave(&pring->ring_lock, iflags);
1108                 list_add_tail(&nvmewqeq->list, &wq->wqfull_list);
1109                 wq->q_flag |= HBA_NVMET_WQFULL;
1110                 spin_unlock_irqrestore(&pring->ring_lock, iflags);
1111                 atomic_inc(&lpfc_nvmep->defer_wqfull);
1112                 return 0;
1113         }
1114
1115         /* Give back resources */
1116         atomic_inc(&lpfc_nvmep->xmt_fcp_drop);
1117         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1118                         "6153 FCP Drop IO x%x: Issue: %d\n",
1119                         ctxp->oxid, rc);
1120
1121         ctxp->wqeq->hba_wqidx = 0;
1122         nvmewqeq->context2 = NULL;
1123         nvmewqeq->context3 = NULL;
1124         rc = -EBUSY;
1125 aerr:
1126         return rc;
1127 }
1128
1129 static void
1130 lpfc_nvmet_targetport_delete(struct nvmet_fc_target_port *targetport)
1131 {
1132         struct lpfc_nvmet_tgtport *tport = targetport->private;
1133
1134         /* release any threads waiting for the unreg to complete */
1135         if (tport->phba->targetport)
1136                 complete(tport->tport_unreg_cmp);
1137 }
1138
1139 static void
1140 lpfc_nvmet_xmt_fcp_abort(struct nvmet_fc_target_port *tgtport,
1141                          struct nvmefc_tgt_fcp_req *req)
1142 {
1143         struct lpfc_nvmet_tgtport *lpfc_nvmep = tgtport->private;
1144         struct lpfc_async_xchg_ctx *ctxp =
1145                 container_of(req, struct lpfc_async_xchg_ctx, hdlrctx.fcp_req);
1146         struct lpfc_hba *phba = ctxp->phba;
1147         struct lpfc_queue *wq;
1148         unsigned long flags;
1149
1150         if (phba->pport->load_flag & FC_UNLOADING)
1151                 return;
1152
1153         if (!ctxp->hdwq)
1154                 ctxp->hdwq = &phba->sli4_hba.hdwq[0];
1155
1156         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1157                         "6103 NVMET Abort op: oxid x%x flg x%x ste %d\n",
1158                         ctxp->oxid, ctxp->flag, ctxp->state);
1159
1160         lpfc_nvmeio_data(phba, "NVMET FCP ABRT: xri x%x flg x%x ste x%x\n",
1161                          ctxp->oxid, ctxp->flag, ctxp->state);
1162
1163         atomic_inc(&lpfc_nvmep->xmt_fcp_abort);
1164
1165         spin_lock_irqsave(&ctxp->ctxlock, flags);
1166
1167         /* Since iaab/iaar are NOT set, we need to check
1168          * if the firmware is in process of aborting IO
1169          */
1170         if (ctxp->flag & (LPFC_NVME_XBUSY | LPFC_NVME_ABORT_OP)) {
1171                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
1172                 return;
1173         }
1174         ctxp->flag |= LPFC_NVME_ABORT_OP;
1175
1176         if (ctxp->flag & LPFC_NVME_DEFER_WQFULL) {
1177                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
1178                 lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid,
1179                                                  ctxp->oxid);
1180                 wq = ctxp->hdwq->io_wq;
1181                 lpfc_nvmet_wqfull_flush(phba, wq, ctxp);
1182                 return;
1183         }
1184         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
1185
1186         /* A state of LPFC_NVME_STE_RCV means we have just received
1187          * the NVME command and have not started processing it.
1188          * (by issuing any IO WQEs on this exchange yet)
1189          */
1190         if (ctxp->state == LPFC_NVME_STE_RCV)
1191                 lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid,
1192                                                  ctxp->oxid);
1193         else
1194                 lpfc_nvmet_sol_fcp_issue_abort(phba, ctxp, ctxp->sid,
1195                                                ctxp->oxid);
1196 }
1197
1198 static void
1199 lpfc_nvmet_xmt_fcp_release(struct nvmet_fc_target_port *tgtport,
1200                            struct nvmefc_tgt_fcp_req *rsp)
1201 {
1202         struct lpfc_nvmet_tgtport *lpfc_nvmep = tgtport->private;
1203         struct lpfc_async_xchg_ctx *ctxp =
1204                 container_of(rsp, struct lpfc_async_xchg_ctx, hdlrctx.fcp_req);
1205         struct lpfc_hba *phba = ctxp->phba;
1206         unsigned long flags;
1207         bool aborting = false;
1208
1209         spin_lock_irqsave(&ctxp->ctxlock, flags);
1210         if (ctxp->flag & LPFC_NVME_XBUSY)
1211                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
1212                                 "6027 NVMET release with XBUSY flag x%x"
1213                                 " oxid x%x\n",
1214                                 ctxp->flag, ctxp->oxid);
1215         else if (ctxp->state != LPFC_NVME_STE_DONE &&
1216                  ctxp->state != LPFC_NVME_STE_ABORT)
1217                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1218                                 "6413 NVMET release bad state %d %d oxid x%x\n",
1219                                 ctxp->state, ctxp->entry_cnt, ctxp->oxid);
1220
1221         if ((ctxp->flag & LPFC_NVME_ABORT_OP) ||
1222             (ctxp->flag & LPFC_NVME_XBUSY)) {
1223                 aborting = true;
1224                 /* let the abort path do the real release */
1225                 lpfc_nvmet_defer_release(phba, ctxp);
1226         }
1227         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
1228
1229         lpfc_nvmeio_data(phba, "NVMET FCP FREE: xri x%x ste %d abt %d\n", ctxp->oxid,
1230                          ctxp->state, aborting);
1231
1232         atomic_inc(&lpfc_nvmep->xmt_fcp_release);
1233         ctxp->flag &= ~LPFC_NVME_TNOTIFY;
1234
1235         if (aborting)
1236                 return;
1237
1238         lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
1239 }
1240
1241 static void
1242 lpfc_nvmet_defer_rcv(struct nvmet_fc_target_port *tgtport,
1243                      struct nvmefc_tgt_fcp_req *rsp)
1244 {
1245         struct lpfc_nvmet_tgtport *tgtp;
1246         struct lpfc_async_xchg_ctx *ctxp =
1247                 container_of(rsp, struct lpfc_async_xchg_ctx, hdlrctx.fcp_req);
1248         struct rqb_dmabuf *nvmebuf = ctxp->rqb_buffer;
1249         struct lpfc_hba *phba = ctxp->phba;
1250         unsigned long iflag;
1251
1252
1253         lpfc_nvmeio_data(phba, "NVMET DEFERRCV: xri x%x sz %d CPU %02x\n",
1254                          ctxp->oxid, ctxp->size, raw_smp_processor_id());
1255
1256         if (!nvmebuf) {
1257                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
1258                                 "6425 Defer rcv: no buffer oxid x%x: "
1259                                 "flg %x ste %x\n",
1260                                 ctxp->oxid, ctxp->flag, ctxp->state);
1261                 return;
1262         }
1263
1264         tgtp = phba->targetport->private;
1265         if (tgtp)
1266                 atomic_inc(&tgtp->rcv_fcp_cmd_defer);
1267
1268         /* Free the nvmebuf since a new buffer already replaced it */
1269         nvmebuf->hrq->rqbp->rqb_free_buffer(phba, nvmebuf);
1270         spin_lock_irqsave(&ctxp->ctxlock, iflag);
1271         ctxp->rqb_buffer = NULL;
1272         spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1273 }
1274
1275 /**
1276  * lpfc_nvmet_ls_req_cmp - completion handler for a nvme ls request
1277  * @phba: Pointer to HBA context object
1278  * @cmdwqe: Pointer to driver command WQE object.
1279  * @wcqe: Pointer to driver response CQE object.
1280  *
1281  * This function is the completion handler for NVME LS requests.
1282  * The function updates any states and statistics, then calls the
1283  * generic completion handler to finish completion of the request.
1284  **/
1285 static void
1286 lpfc_nvmet_ls_req_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
1287                        struct lpfc_wcqe_complete *wcqe)
1288 {
1289         __lpfc_nvme_ls_req_cmp(phba, cmdwqe->vport, cmdwqe, wcqe);
1290 }
1291
1292 /**
1293  * lpfc_nvmet_ls_req - Issue an Link Service request
1294  * @targetport - pointer to target instance registered with nvmet transport.
1295  * @hosthandle - hosthandle set by the driver in a prior ls_rqst_rcv.
1296  *               Driver sets this value to the ndlp pointer.
1297  * @pnvme_lsreq - the transport nvme_ls_req structure for the LS
1298  *
1299  * Driver registers this routine to handle any link service request
1300  * from the nvme_fc transport to a remote nvme-aware port.
1301  *
1302  * Return value :
1303  *   0 - Success
1304  *   non-zero: various error codes, in form of -Exxx
1305  **/
1306 static int
1307 lpfc_nvmet_ls_req(struct nvmet_fc_target_port *targetport,
1308                   void *hosthandle,
1309                   struct nvmefc_ls_req *pnvme_lsreq)
1310 {
1311         struct lpfc_nvmet_tgtport *lpfc_nvmet = targetport->private;
1312         struct lpfc_hba *phba;
1313         struct lpfc_nodelist *ndlp;
1314         int ret;
1315         u32 hstate;
1316
1317         if (!lpfc_nvmet)
1318                 return -EINVAL;
1319
1320         phba = lpfc_nvmet->phba;
1321         if (phba->pport->load_flag & FC_UNLOADING)
1322                 return -EINVAL;
1323
1324         hstate = atomic_read(&lpfc_nvmet->state);
1325         if (hstate == LPFC_NVMET_INV_HOST_ACTIVE)
1326                 return -EACCES;
1327
1328         ndlp = (struct lpfc_nodelist *)hosthandle;
1329
1330         ret = __lpfc_nvme_ls_req(phba->pport, ndlp, pnvme_lsreq,
1331                                  lpfc_nvmet_ls_req_cmp);
1332
1333         return ret;
1334 }
1335
1336 /**
1337  * lpfc_nvmet_ls_abort - Abort a prior NVME LS request
1338  * @targetport: Transport targetport, that LS was issued from.
1339  * @hosthandle - hosthandle set by the driver in a prior ls_rqst_rcv.
1340  *               Driver sets this value to the ndlp pointer.
1341  * @pnvme_lsreq - the transport nvme_ls_req structure for LS to be aborted
1342  *
1343  * Driver registers this routine to abort an NVME LS request that is
1344  * in progress (from the transports perspective).
1345  **/
1346 static void
1347 lpfc_nvmet_ls_abort(struct nvmet_fc_target_port *targetport,
1348                     void *hosthandle,
1349                     struct nvmefc_ls_req *pnvme_lsreq)
1350 {
1351         struct lpfc_nvmet_tgtport *lpfc_nvmet = targetport->private;
1352         struct lpfc_hba *phba;
1353         struct lpfc_nodelist *ndlp;
1354         int ret;
1355
1356         phba = lpfc_nvmet->phba;
1357         if (phba->pport->load_flag & FC_UNLOADING)
1358                 return;
1359
1360         ndlp = (struct lpfc_nodelist *)hosthandle;
1361
1362         ret = __lpfc_nvme_ls_abort(phba->pport, ndlp, pnvme_lsreq);
1363         if (!ret)
1364                 atomic_inc(&lpfc_nvmet->xmt_ls_abort);
1365 }
1366
1367 static void
1368 lpfc_nvmet_host_release(void *hosthandle)
1369 {
1370         struct lpfc_nodelist *ndlp = hosthandle;
1371         struct lpfc_hba *phba = NULL;
1372         struct lpfc_nvmet_tgtport *tgtp;
1373
1374         phba = ndlp->phba;
1375         if (!phba->targetport || !phba->targetport->private)
1376                 return;
1377
1378         lpfc_printf_log(phba, KERN_ERR, LOG_NVME,
1379                         "6202 NVMET XPT releasing hosthandle x%px\n",
1380                         hosthandle);
1381         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
1382         atomic_set(&tgtp->state, 0);
1383 }
1384
1385 static void
1386 lpfc_nvmet_discovery_event(struct nvmet_fc_target_port *tgtport)
1387 {
1388         struct lpfc_nvmet_tgtport *tgtp;
1389         struct lpfc_hba *phba;
1390         uint32_t rc;
1391
1392         tgtp = tgtport->private;
1393         phba = tgtp->phba;
1394
1395         rc = lpfc_issue_els_rscn(phba->pport, 0);
1396         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1397                         "6420 NVMET subsystem change: Notification %s\n",
1398                         (rc) ? "Failed" : "Sent");
1399 }
1400
1401 static struct nvmet_fc_target_template lpfc_tgttemplate = {
1402         .targetport_delete = lpfc_nvmet_targetport_delete,
1403         .xmt_ls_rsp     = lpfc_nvmet_xmt_ls_rsp,
1404         .fcp_op         = lpfc_nvmet_xmt_fcp_op,
1405         .fcp_abort      = lpfc_nvmet_xmt_fcp_abort,
1406         .fcp_req_release = lpfc_nvmet_xmt_fcp_release,
1407         .defer_rcv      = lpfc_nvmet_defer_rcv,
1408         .discovery_event = lpfc_nvmet_discovery_event,
1409         .ls_req         = lpfc_nvmet_ls_req,
1410         .ls_abort       = lpfc_nvmet_ls_abort,
1411         .host_release   = lpfc_nvmet_host_release,
1412
1413         .max_hw_queues  = 1,
1414         .max_sgl_segments = LPFC_NVMET_DEFAULT_SEGS,
1415         .max_dif_sgl_segments = LPFC_NVMET_DEFAULT_SEGS,
1416         .dma_boundary = 0xFFFFFFFF,
1417
1418         /* optional features */
1419         .target_features = 0,
1420         /* sizes of additional private data for data structures */
1421         .target_priv_sz = sizeof(struct lpfc_nvmet_tgtport),
1422         .lsrqst_priv_sz = 0,
1423 };
1424
1425 static void
1426 __lpfc_nvmet_clean_io_for_cpu(struct lpfc_hba *phba,
1427                 struct lpfc_nvmet_ctx_info *infop)
1428 {
1429         struct lpfc_nvmet_ctxbuf *ctx_buf, *next_ctx_buf;
1430         unsigned long flags;
1431
1432         spin_lock_irqsave(&infop->nvmet_ctx_list_lock, flags);
1433         list_for_each_entry_safe(ctx_buf, next_ctx_buf,
1434                                 &infop->nvmet_ctx_list, list) {
1435                 spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1436                 list_del_init(&ctx_buf->list);
1437                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1438
1439                 __lpfc_clear_active_sglq(phba, ctx_buf->sglq->sli4_lxritag);
1440                 ctx_buf->sglq->state = SGL_FREED;
1441                 ctx_buf->sglq->ndlp = NULL;
1442
1443                 spin_lock(&phba->sli4_hba.sgl_list_lock);
1444                 list_add_tail(&ctx_buf->sglq->list,
1445                                 &phba->sli4_hba.lpfc_nvmet_sgl_list);
1446                 spin_unlock(&phba->sli4_hba.sgl_list_lock);
1447
1448                 lpfc_sli_release_iocbq(phba, ctx_buf->iocbq);
1449                 kfree(ctx_buf->context);
1450         }
1451         spin_unlock_irqrestore(&infop->nvmet_ctx_list_lock, flags);
1452 }
1453
1454 static void
1455 lpfc_nvmet_cleanup_io_context(struct lpfc_hba *phba)
1456 {
1457         struct lpfc_nvmet_ctx_info *infop;
1458         int i, j;
1459
1460         /* The first context list, MRQ 0 CPU 0 */
1461         infop = phba->sli4_hba.nvmet_ctx_info;
1462         if (!infop)
1463                 return;
1464
1465         /* Cycle the the entire CPU context list for every MRQ */
1466         for (i = 0; i < phba->cfg_nvmet_mrq; i++) {
1467                 for_each_present_cpu(j) {
1468                         infop = lpfc_get_ctx_list(phba, j, i);
1469                         __lpfc_nvmet_clean_io_for_cpu(phba, infop);
1470                 }
1471         }
1472         kfree(phba->sli4_hba.nvmet_ctx_info);
1473         phba->sli4_hba.nvmet_ctx_info = NULL;
1474 }
1475
1476 static int
1477 lpfc_nvmet_setup_io_context(struct lpfc_hba *phba)
1478 {
1479         struct lpfc_nvmet_ctxbuf *ctx_buf;
1480         struct lpfc_iocbq *nvmewqe;
1481         union lpfc_wqe128 *wqe;
1482         struct lpfc_nvmet_ctx_info *last_infop;
1483         struct lpfc_nvmet_ctx_info *infop;
1484         int i, j, idx, cpu;
1485
1486         lpfc_printf_log(phba, KERN_INFO, LOG_NVME,
1487                         "6403 Allocate NVMET resources for %d XRIs\n",
1488                         phba->sli4_hba.nvmet_xri_cnt);
1489
1490         phba->sli4_hba.nvmet_ctx_info = kcalloc(
1491                 phba->sli4_hba.num_possible_cpu * phba->cfg_nvmet_mrq,
1492                 sizeof(struct lpfc_nvmet_ctx_info), GFP_KERNEL);
1493         if (!phba->sli4_hba.nvmet_ctx_info) {
1494                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1495                                 "6419 Failed allocate memory for "
1496                                 "nvmet context lists\n");
1497                 return -ENOMEM;
1498         }
1499
1500         /*
1501          * Assuming X CPUs in the system, and Y MRQs, allocate some
1502          * lpfc_nvmet_ctx_info structures as follows:
1503          *
1504          * cpu0/mrq0 cpu1/mrq0 ... cpuX/mrq0
1505          * cpu0/mrq1 cpu1/mrq1 ... cpuX/mrq1
1506          * ...
1507          * cpuX/mrqY cpuX/mrqY ... cpuX/mrqY
1508          *
1509          * Each line represents a MRQ "silo" containing an entry for
1510          * every CPU.
1511          *
1512          * MRQ X is initially assumed to be associated with CPU X, thus
1513          * contexts are initially distributed across all MRQs using
1514          * the MRQ index (N) as follows cpuN/mrqN. When contexts are
1515          * freed, the are freed to the MRQ silo based on the CPU number
1516          * of the IO completion. Thus a context that was allocated for MRQ A
1517          * whose IO completed on CPU B will be freed to cpuB/mrqA.
1518          */
1519         for_each_possible_cpu(i) {
1520                 for (j = 0; j < phba->cfg_nvmet_mrq; j++) {
1521                         infop = lpfc_get_ctx_list(phba, i, j);
1522                         INIT_LIST_HEAD(&infop->nvmet_ctx_list);
1523                         spin_lock_init(&infop->nvmet_ctx_list_lock);
1524                         infop->nvmet_ctx_list_cnt = 0;
1525                 }
1526         }
1527
1528         /*
1529          * Setup the next CPU context info ptr for each MRQ.
1530          * MRQ 0 will cycle thru CPUs 0 - X separately from
1531          * MRQ 1 cycling thru CPUs 0 - X, and so on.
1532          */
1533         for (j = 0; j < phba->cfg_nvmet_mrq; j++) {
1534                 last_infop = lpfc_get_ctx_list(phba,
1535                                                cpumask_first(cpu_present_mask),
1536                                                j);
1537                 for (i = phba->sli4_hba.num_possible_cpu - 1;  i >= 0; i--) {
1538                         infop = lpfc_get_ctx_list(phba, i, j);
1539                         infop->nvmet_ctx_next_cpu = last_infop;
1540                         last_infop = infop;
1541                 }
1542         }
1543
1544         /* For all nvmet xris, allocate resources needed to process a
1545          * received command on a per xri basis.
1546          */
1547         idx = 0;
1548         cpu = cpumask_first(cpu_present_mask);
1549         for (i = 0; i < phba->sli4_hba.nvmet_xri_cnt; i++) {
1550                 ctx_buf = kzalloc(sizeof(*ctx_buf), GFP_KERNEL);
1551                 if (!ctx_buf) {
1552                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1553                                         "6404 Ran out of memory for NVMET\n");
1554                         return -ENOMEM;
1555                 }
1556
1557                 ctx_buf->context = kzalloc(sizeof(*ctx_buf->context),
1558                                            GFP_KERNEL);
1559                 if (!ctx_buf->context) {
1560                         kfree(ctx_buf);
1561                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1562                                         "6405 Ran out of NVMET "
1563                                         "context memory\n");
1564                         return -ENOMEM;
1565                 }
1566                 ctx_buf->context->ctxbuf = ctx_buf;
1567                 ctx_buf->context->state = LPFC_NVME_STE_FREE;
1568
1569                 ctx_buf->iocbq = lpfc_sli_get_iocbq(phba);
1570                 if (!ctx_buf->iocbq) {
1571                         kfree(ctx_buf->context);
1572                         kfree(ctx_buf);
1573                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1574                                         "6406 Ran out of NVMET iocb/WQEs\n");
1575                         return -ENOMEM;
1576                 }
1577                 ctx_buf->iocbq->iocb_flag = LPFC_IO_NVMET;
1578                 nvmewqe = ctx_buf->iocbq;
1579                 wqe = &nvmewqe->wqe;
1580
1581                 /* Initialize WQE */
1582                 memset(wqe, 0, sizeof(*wqe));
1583
1584                 ctx_buf->iocbq->context1 = NULL;
1585                 spin_lock(&phba->sli4_hba.sgl_list_lock);
1586                 ctx_buf->sglq = __lpfc_sli_get_nvmet_sglq(phba, ctx_buf->iocbq);
1587                 spin_unlock(&phba->sli4_hba.sgl_list_lock);
1588                 if (!ctx_buf->sglq) {
1589                         lpfc_sli_release_iocbq(phba, ctx_buf->iocbq);
1590                         kfree(ctx_buf->context);
1591                         kfree(ctx_buf);
1592                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1593                                         "6407 Ran out of NVMET XRIs\n");
1594                         return -ENOMEM;
1595                 }
1596                 INIT_WORK(&ctx_buf->defer_work, lpfc_nvmet_fcp_rqst_defer_work);
1597
1598                 /*
1599                  * Add ctx to MRQidx context list. Our initial assumption
1600                  * is MRQidx will be associated with CPUidx. This association
1601                  * can change on the fly.
1602                  */
1603                 infop = lpfc_get_ctx_list(phba, cpu, idx);
1604                 spin_lock(&infop->nvmet_ctx_list_lock);
1605                 list_add_tail(&ctx_buf->list, &infop->nvmet_ctx_list);
1606                 infop->nvmet_ctx_list_cnt++;
1607                 spin_unlock(&infop->nvmet_ctx_list_lock);
1608
1609                 /* Spread ctx structures evenly across all MRQs */
1610                 idx++;
1611                 if (idx >= phba->cfg_nvmet_mrq) {
1612                         idx = 0;
1613                         cpu = cpumask_first(cpu_present_mask);
1614                         continue;
1615                 }
1616                 cpu = cpumask_next(cpu, cpu_present_mask);
1617                 if (cpu == nr_cpu_ids)
1618                         cpu = cpumask_first(cpu_present_mask);
1619
1620         }
1621
1622         for_each_present_cpu(i) {
1623                 for (j = 0; j < phba->cfg_nvmet_mrq; j++) {
1624                         infop = lpfc_get_ctx_list(phba, i, j);
1625                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME | LOG_INIT,
1626                                         "6408 TOTAL NVMET ctx for CPU %d "
1627                                         "MRQ %d: cnt %d nextcpu x%px\n",
1628                                         i, j, infop->nvmet_ctx_list_cnt,
1629                                         infop->nvmet_ctx_next_cpu);
1630                 }
1631         }
1632         return 0;
1633 }
1634
1635 int
1636 lpfc_nvmet_create_targetport(struct lpfc_hba *phba)
1637 {
1638         struct lpfc_vport  *vport = phba->pport;
1639         struct lpfc_nvmet_tgtport *tgtp;
1640         struct nvmet_fc_port_info pinfo;
1641         int error;
1642
1643         if (phba->targetport)
1644                 return 0;
1645
1646         error = lpfc_nvmet_setup_io_context(phba);
1647         if (error)
1648                 return error;
1649
1650         memset(&pinfo, 0, sizeof(struct nvmet_fc_port_info));
1651         pinfo.node_name = wwn_to_u64(vport->fc_nodename.u.wwn);
1652         pinfo.port_name = wwn_to_u64(vport->fc_portname.u.wwn);
1653         pinfo.port_id = vport->fc_myDID;
1654
1655         /* We need to tell the transport layer + 1 because it takes page
1656          * alignment into account. When space for the SGL is allocated we
1657          * allocate + 3, one for cmd, one for rsp and one for this alignment
1658          */
1659         lpfc_tgttemplate.max_sgl_segments = phba->cfg_nvme_seg_cnt + 1;
1660         lpfc_tgttemplate.max_hw_queues = phba->cfg_hdw_queue;
1661         lpfc_tgttemplate.target_features = NVMET_FCTGTFEAT_READDATA_RSP;
1662
1663 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
1664         error = nvmet_fc_register_targetport(&pinfo, &lpfc_tgttemplate,
1665                                              &phba->pcidev->dev,
1666                                              &phba->targetport);
1667 #else
1668         error = -ENOENT;
1669 #endif
1670         if (error) {
1671                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1672                                 "6025 Cannot register NVME targetport x%x: "
1673                                 "portnm %llx nodenm %llx segs %d qs %d\n",
1674                                 error,
1675                                 pinfo.port_name, pinfo.node_name,
1676                                 lpfc_tgttemplate.max_sgl_segments,
1677                                 lpfc_tgttemplate.max_hw_queues);
1678                 phba->targetport = NULL;
1679                 phba->nvmet_support = 0;
1680
1681                 lpfc_nvmet_cleanup_io_context(phba);
1682
1683         } else {
1684                 tgtp = (struct lpfc_nvmet_tgtport *)
1685                         phba->targetport->private;
1686                 tgtp->phba = phba;
1687
1688                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
1689                                 "6026 Registered NVME "
1690                                 "targetport: x%px, private x%px "
1691                                 "portnm %llx nodenm %llx segs %d qs %d\n",
1692                                 phba->targetport, tgtp,
1693                                 pinfo.port_name, pinfo.node_name,
1694                                 lpfc_tgttemplate.max_sgl_segments,
1695                                 lpfc_tgttemplate.max_hw_queues);
1696
1697                 atomic_set(&tgtp->rcv_ls_req_in, 0);
1698                 atomic_set(&tgtp->rcv_ls_req_out, 0);
1699                 atomic_set(&tgtp->rcv_ls_req_drop, 0);
1700                 atomic_set(&tgtp->xmt_ls_abort, 0);
1701                 atomic_set(&tgtp->xmt_ls_abort_cmpl, 0);
1702                 atomic_set(&tgtp->xmt_ls_rsp, 0);
1703                 atomic_set(&tgtp->xmt_ls_drop, 0);
1704                 atomic_set(&tgtp->xmt_ls_rsp_error, 0);
1705                 atomic_set(&tgtp->xmt_ls_rsp_xb_set, 0);
1706                 atomic_set(&tgtp->xmt_ls_rsp_aborted, 0);
1707                 atomic_set(&tgtp->xmt_ls_rsp_cmpl, 0);
1708                 atomic_set(&tgtp->rcv_fcp_cmd_in, 0);
1709                 atomic_set(&tgtp->rcv_fcp_cmd_out, 0);
1710                 atomic_set(&tgtp->rcv_fcp_cmd_drop, 0);
1711                 atomic_set(&tgtp->xmt_fcp_drop, 0);
1712                 atomic_set(&tgtp->xmt_fcp_read_rsp, 0);
1713                 atomic_set(&tgtp->xmt_fcp_read, 0);
1714                 atomic_set(&tgtp->xmt_fcp_write, 0);
1715                 atomic_set(&tgtp->xmt_fcp_rsp, 0);
1716                 atomic_set(&tgtp->xmt_fcp_release, 0);
1717                 atomic_set(&tgtp->xmt_fcp_rsp_cmpl, 0);
1718                 atomic_set(&tgtp->xmt_fcp_rsp_error, 0);
1719                 atomic_set(&tgtp->xmt_fcp_rsp_xb_set, 0);
1720                 atomic_set(&tgtp->xmt_fcp_rsp_aborted, 0);
1721                 atomic_set(&tgtp->xmt_fcp_rsp_drop, 0);
1722                 atomic_set(&tgtp->xmt_fcp_xri_abort_cqe, 0);
1723                 atomic_set(&tgtp->xmt_fcp_abort, 0);
1724                 atomic_set(&tgtp->xmt_fcp_abort_cmpl, 0);
1725                 atomic_set(&tgtp->xmt_abort_unsol, 0);
1726                 atomic_set(&tgtp->xmt_abort_sol, 0);
1727                 atomic_set(&tgtp->xmt_abort_rsp, 0);
1728                 atomic_set(&tgtp->xmt_abort_rsp_error, 0);
1729                 atomic_set(&tgtp->defer_ctx, 0);
1730                 atomic_set(&tgtp->defer_fod, 0);
1731                 atomic_set(&tgtp->defer_wqfull, 0);
1732         }
1733         return error;
1734 }
1735
1736 int
1737 lpfc_nvmet_update_targetport(struct lpfc_hba *phba)
1738 {
1739         struct lpfc_vport  *vport = phba->pport;
1740
1741         if (!phba->targetport)
1742                 return 0;
1743
1744         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
1745                          "6007 Update NVMET port x%px did x%x\n",
1746                          phba->targetport, vport->fc_myDID);
1747
1748         phba->targetport->port_id = vport->fc_myDID;
1749         return 0;
1750 }
1751
1752 /**
1753  * lpfc_sli4_nvmet_xri_aborted - Fast-path process of nvmet xri abort
1754  * @phba: pointer to lpfc hba data structure.
1755  * @axri: pointer to the nvmet xri abort wcqe structure.
1756  *
1757  * This routine is invoked by the worker thread to process a SLI4 fast-path
1758  * NVMET aborted xri.
1759  **/
1760 void
1761 lpfc_sli4_nvmet_xri_aborted(struct lpfc_hba *phba,
1762                             struct sli4_wcqe_xri_aborted *axri)
1763 {
1764 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
1765         uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
1766         uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
1767         struct lpfc_async_xchg_ctx *ctxp, *next_ctxp;
1768         struct lpfc_nvmet_tgtport *tgtp;
1769         struct nvmefc_tgt_fcp_req *req = NULL;
1770         struct lpfc_nodelist *ndlp;
1771         unsigned long iflag = 0;
1772         int rrq_empty = 0;
1773         bool released = false;
1774
1775         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1776                         "6317 XB aborted xri x%x rxid x%x\n", xri, rxid);
1777
1778         if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_NVME))
1779                 return;
1780
1781         if (phba->targetport) {
1782                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
1783                 atomic_inc(&tgtp->xmt_fcp_xri_abort_cqe);
1784         }
1785
1786         spin_lock_irqsave(&phba->hbalock, iflag);
1787         spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1788         list_for_each_entry_safe(ctxp, next_ctxp,
1789                                  &phba->sli4_hba.lpfc_abts_nvmet_ctx_list,
1790                                  list) {
1791                 if (ctxp->ctxbuf->sglq->sli4_xritag != xri)
1792                         continue;
1793
1794                 spin_lock(&ctxp->ctxlock);
1795                 /* Check if we already received a free context call
1796                  * and we have completed processing an abort situation.
1797                  */
1798                 if (ctxp->flag & LPFC_NVME_CTX_RLS &&
1799                     !(ctxp->flag & LPFC_NVME_ABORT_OP)) {
1800                         list_del_init(&ctxp->list);
1801                         released = true;
1802                 }
1803                 ctxp->flag &= ~LPFC_NVME_XBUSY;
1804                 spin_unlock(&ctxp->ctxlock);
1805                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1806
1807                 rrq_empty = list_empty(&phba->active_rrq_list);
1808                 spin_unlock_irqrestore(&phba->hbalock, iflag);
1809                 ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
1810                 if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
1811                     (ndlp->nlp_state == NLP_STE_UNMAPPED_NODE ||
1812                      ndlp->nlp_state == NLP_STE_MAPPED_NODE)) {
1813                         lpfc_set_rrq_active(phba, ndlp,
1814                                 ctxp->ctxbuf->sglq->sli4_lxritag,
1815                                 rxid, 1);
1816                         lpfc_sli4_abts_err_handler(phba, ndlp, axri);
1817                 }
1818
1819                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1820                                 "6318 XB aborted oxid x%x flg x%x (%x)\n",
1821                                 ctxp->oxid, ctxp->flag, released);
1822                 if (released)
1823                         lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
1824
1825                 if (rrq_empty)
1826                         lpfc_worker_wake_up(phba);
1827                 return;
1828         }
1829         spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1830         spin_unlock_irqrestore(&phba->hbalock, iflag);
1831
1832         ctxp = lpfc_nvmet_get_ctx_for_xri(phba, xri);
1833         if (ctxp) {
1834                 /*
1835                  *  Abort already done by FW, so BA_ACC sent.
1836                  *  However, the transport may be unaware.
1837                  */
1838                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1839                                 "6323 NVMET Rcv ABTS xri x%x ctxp state x%x "
1840                                 "flag x%x oxid x%x rxid x%x\n",
1841                                 xri, ctxp->state, ctxp->flag, ctxp->oxid,
1842                                 rxid);
1843
1844                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
1845                 ctxp->flag |= LPFC_NVME_ABTS_RCV;
1846                 ctxp->state = LPFC_NVME_STE_ABORT;
1847                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1848
1849                 lpfc_nvmeio_data(phba,
1850                                  "NVMET ABTS RCV: xri x%x CPU %02x rjt %d\n",
1851                                  xri, raw_smp_processor_id(), 0);
1852
1853                 req = &ctxp->hdlrctx.fcp_req;
1854                 if (req)
1855                         nvmet_fc_rcv_fcp_abort(phba->targetport, req);
1856         }
1857 #endif
1858 }
1859
1860 int
1861 lpfc_nvmet_rcv_unsol_abort(struct lpfc_vport *vport,
1862                            struct fc_frame_header *fc_hdr)
1863 {
1864 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
1865         struct lpfc_hba *phba = vport->phba;
1866         struct lpfc_async_xchg_ctx *ctxp, *next_ctxp;
1867         struct nvmefc_tgt_fcp_req *rsp;
1868         uint32_t sid;
1869         uint16_t oxid, xri;
1870         unsigned long iflag = 0;
1871
1872         sid = sli4_sid_from_fc_hdr(fc_hdr);
1873         oxid = be16_to_cpu(fc_hdr->fh_ox_id);
1874
1875         spin_lock_irqsave(&phba->hbalock, iflag);
1876         spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1877         list_for_each_entry_safe(ctxp, next_ctxp,
1878                                  &phba->sli4_hba.lpfc_abts_nvmet_ctx_list,
1879                                  list) {
1880                 if (ctxp->oxid != oxid || ctxp->sid != sid)
1881                         continue;
1882
1883                 xri = ctxp->ctxbuf->sglq->sli4_xritag;
1884
1885                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1886                 spin_unlock_irqrestore(&phba->hbalock, iflag);
1887
1888                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
1889                 ctxp->flag |= LPFC_NVME_ABTS_RCV;
1890                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1891
1892                 lpfc_nvmeio_data(phba,
1893                         "NVMET ABTS RCV: xri x%x CPU %02x rjt %d\n",
1894                         xri, raw_smp_processor_id(), 0);
1895
1896                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1897                                 "6319 NVMET Rcv ABTS:acc xri x%x\n", xri);
1898
1899                 rsp = &ctxp->hdlrctx.fcp_req;
1900                 nvmet_fc_rcv_fcp_abort(phba->targetport, rsp);
1901
1902                 /* Respond with BA_ACC accordingly */
1903                 lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 1);
1904                 return 0;
1905         }
1906         spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1907         spin_unlock_irqrestore(&phba->hbalock, iflag);
1908
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->context2 == ctxp) {
2024                                 list_del(&nvmewqeq->list);
2025                                 spin_unlock_irqrestore(&pring->ring_lock,
2026                                                        iflags);
2027                                 lpfc_nvmet_xmt_fcp_op_cmp(phba, nvmewqeq,
2028                                                           wcqep);
2029                                 return;
2030                         }
2031                         continue;
2032                 } else {
2033                         /* Flush all IOs */
2034                         list_del(&nvmewqeq->list);
2035                         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2036                         lpfc_nvmet_xmt_fcp_op_cmp(phba, nvmewqeq, wcqep);
2037                         spin_lock_irqsave(&pring->ring_lock, iflags);
2038                 }
2039         }
2040         if (!ctxp)
2041                 wq->q_flag &= ~HBA_NVMET_WQFULL;
2042         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2043 }
2044
2045 void
2046 lpfc_nvmet_wqfull_process(struct lpfc_hba *phba,
2047                           struct lpfc_queue *wq)
2048 {
2049 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2050         struct lpfc_sli_ring *pring;
2051         struct lpfc_iocbq *nvmewqeq;
2052         struct lpfc_async_xchg_ctx *ctxp;
2053         unsigned long iflags;
2054         int rc;
2055
2056         /*
2057          * Some WQE slots are available, so try to re-issue anything
2058          * on the WQ wqfull_list.
2059          */
2060         pring = wq->pring;
2061         spin_lock_irqsave(&pring->ring_lock, iflags);
2062         while (!list_empty(&wq->wqfull_list)) {
2063                 list_remove_head(&wq->wqfull_list, nvmewqeq, struct lpfc_iocbq,
2064                                  list);
2065                 spin_unlock_irqrestore(&pring->ring_lock, iflags);
2066                 ctxp = (struct lpfc_async_xchg_ctx *)nvmewqeq->context2;
2067                 rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, nvmewqeq);
2068                 spin_lock_irqsave(&pring->ring_lock, iflags);
2069                 if (rc == -EBUSY) {
2070                         /* WQ was full again, so put it back on the list */
2071                         list_add(&nvmewqeq->list, &wq->wqfull_list);
2072                         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2073                         return;
2074                 }
2075                 if (rc == WQE_SUCCESS) {
2076 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2077                         if (ctxp->ts_cmd_nvme) {
2078                                 if (ctxp->hdlrctx.fcp_req.op == NVMET_FCOP_RSP)
2079                                         ctxp->ts_status_wqput = ktime_get_ns();
2080                                 else
2081                                         ctxp->ts_data_wqput = ktime_get_ns();
2082                         }
2083 #endif
2084                 } else {
2085                         WARN_ON(rc);
2086                 }
2087         }
2088         wq->q_flag &= ~HBA_NVMET_WQFULL;
2089         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2090
2091 #endif
2092 }
2093
2094 void
2095 lpfc_nvmet_destroy_targetport(struct lpfc_hba *phba)
2096 {
2097 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2098         struct lpfc_nvmet_tgtport *tgtp;
2099         struct lpfc_queue *wq;
2100         uint32_t qidx;
2101         DECLARE_COMPLETION_ONSTACK(tport_unreg_cmp);
2102
2103         if (phba->nvmet_support == 0)
2104                 return;
2105         if (phba->targetport) {
2106                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2107                 for (qidx = 0; qidx < phba->cfg_hdw_queue; qidx++) {
2108                         wq = phba->sli4_hba.hdwq[qidx].io_wq;
2109                         lpfc_nvmet_wqfull_flush(phba, wq, NULL);
2110                 }
2111                 tgtp->tport_unreg_cmp = &tport_unreg_cmp;
2112                 nvmet_fc_unregister_targetport(phba->targetport);
2113                 if (!wait_for_completion_timeout(&tport_unreg_cmp,
2114                                         msecs_to_jiffies(LPFC_NVMET_WAIT_TMO)))
2115                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2116                                         "6179 Unreg targetport x%px timeout "
2117                                         "reached.\n", phba->targetport);
2118                 lpfc_nvmet_cleanup_io_context(phba);
2119         }
2120         phba->targetport = NULL;
2121 #endif
2122 }
2123
2124 /**
2125  * lpfc_nvmet_handle_lsreq - Process an NVME LS request
2126  * @phba: pointer to lpfc hba data structure.
2127  * @axchg: pointer to exchange context for the NVME LS request
2128  *
2129  * This routine is used for processing an asychronously received NVME LS
2130  * request. Any remaining validation is done and the LS is then forwarded
2131  * to the nvmet-fc transport via nvmet_fc_rcv_ls_req().
2132  *
2133  * The calling sequence should be: nvmet_fc_rcv_ls_req() -> (processing)
2134  * -> lpfc_nvmet_xmt_ls_rsp/cmp -> req->done.
2135  * lpfc_nvme_xmt_ls_rsp_cmp should free the allocated axchg.
2136  *
2137  * Returns 0 if LS was handled and delivered to the transport
2138  * Returns 1 if LS failed to be handled and should be dropped
2139  */
2140 int
2141 lpfc_nvmet_handle_lsreq(struct lpfc_hba *phba,
2142                         struct lpfc_async_xchg_ctx *axchg)
2143 {
2144 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2145         struct lpfc_nvmet_tgtport *tgtp = phba->targetport->private;
2146         uint32_t *payload = axchg->payload;
2147         int rc;
2148
2149         atomic_inc(&tgtp->rcv_ls_req_in);
2150
2151         /*
2152          * Driver passes the ndlp as the hosthandle argument allowing
2153          * the transport to generate LS requests for any associateions
2154          * that are created.
2155          */
2156         rc = nvmet_fc_rcv_ls_req(phba->targetport, axchg->ndlp, &axchg->ls_rsp,
2157                                  axchg->payload, axchg->size);
2158
2159         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
2160                         "6037 NVMET Unsol rcv: sz %d rc %d: %08x %08x %08x "
2161                         "%08x %08x %08x\n", axchg->size, rc,
2162                         *payload, *(payload+1), *(payload+2),
2163                         *(payload+3), *(payload+4), *(payload+5));
2164
2165         if (!rc) {
2166                 atomic_inc(&tgtp->rcv_ls_req_out);
2167                 return 0;
2168         }
2169
2170         atomic_inc(&tgtp->rcv_ls_req_drop);
2171 #endif
2172         return 1;
2173 }
2174
2175 static void
2176 lpfc_nvmet_process_rcv_fcp_req(struct lpfc_nvmet_ctxbuf *ctx_buf)
2177 {
2178 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2179         struct lpfc_async_xchg_ctx *ctxp = ctx_buf->context;
2180         struct lpfc_hba *phba = ctxp->phba;
2181         struct rqb_dmabuf *nvmebuf = ctxp->rqb_buffer;
2182         struct lpfc_nvmet_tgtport *tgtp;
2183         uint32_t *payload, qno;
2184         uint32_t rc;
2185         unsigned long iflags;
2186
2187         if (!nvmebuf) {
2188                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2189                         "6159 process_rcv_fcp_req, nvmebuf is NULL, "
2190                         "oxid: x%x flg: x%x state: x%x\n",
2191                         ctxp->oxid, ctxp->flag, ctxp->state);
2192                 spin_lock_irqsave(&ctxp->ctxlock, iflags);
2193                 lpfc_nvmet_defer_release(phba, ctxp);
2194                 spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2195                 lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid,
2196                                                  ctxp->oxid);
2197                 return;
2198         }
2199
2200         if (ctxp->flag & LPFC_NVME_ABTS_RCV) {
2201                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2202                                 "6324 IO oxid x%x aborted\n",
2203                                 ctxp->oxid);
2204                 return;
2205         }
2206
2207         payload = (uint32_t *)(nvmebuf->dbuf.virt);
2208         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2209         ctxp->flag |= LPFC_NVME_TNOTIFY;
2210 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2211         if (ctxp->ts_isr_cmd)
2212                 ctxp->ts_cmd_nvme = ktime_get_ns();
2213 #endif
2214         /*
2215          * The calling sequence should be:
2216          * nvmet_fc_rcv_fcp_req->lpfc_nvmet_xmt_fcp_op/cmp- req->done
2217          * lpfc_nvmet_xmt_fcp_op_cmp should free the allocated ctxp.
2218          * When we return from nvmet_fc_rcv_fcp_req, all relevant info
2219          * the NVME command / FC header is stored.
2220          * A buffer has already been reposted for this IO, so just free
2221          * the nvmebuf.
2222          */
2223         rc = nvmet_fc_rcv_fcp_req(phba->targetport, &ctxp->hdlrctx.fcp_req,
2224                                   payload, ctxp->size);
2225         /* Process FCP command */
2226         if (rc == 0) {
2227                 atomic_inc(&tgtp->rcv_fcp_cmd_out);
2228                 spin_lock_irqsave(&ctxp->ctxlock, iflags);
2229                 if ((ctxp->flag & LPFC_NVME_CTX_REUSE_WQ) ||
2230                     (nvmebuf != ctxp->rqb_buffer)) {
2231                         spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2232                         return;
2233                 }
2234                 ctxp->rqb_buffer = NULL;
2235                 spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2236                 lpfc_rq_buf_free(phba, &nvmebuf->hbuf); /* repost */
2237                 return;
2238         }
2239
2240         /* Processing of FCP command is deferred */
2241         if (rc == -EOVERFLOW) {
2242                 lpfc_nvmeio_data(phba, "NVMET RCV BUSY: xri x%x sz %d "
2243                                  "from %06x\n",
2244                                  ctxp->oxid, ctxp->size, ctxp->sid);
2245                 atomic_inc(&tgtp->rcv_fcp_cmd_out);
2246                 atomic_inc(&tgtp->defer_fod);
2247                 spin_lock_irqsave(&ctxp->ctxlock, iflags);
2248                 if (ctxp->flag & LPFC_NVME_CTX_REUSE_WQ) {
2249                         spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2250                         return;
2251                 }
2252                 spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2253                 /*
2254                  * Post a replacement DMA buffer to RQ and defer
2255                  * freeing rcv buffer till .defer_rcv callback
2256                  */
2257                 qno = nvmebuf->idx;
2258                 lpfc_post_rq_buffer(
2259                         phba, phba->sli4_hba.nvmet_mrq_hdr[qno],
2260                         phba->sli4_hba.nvmet_mrq_data[qno], 1, qno);
2261                 return;
2262         }
2263         ctxp->flag &= ~LPFC_NVME_TNOTIFY;
2264         atomic_inc(&tgtp->rcv_fcp_cmd_drop);
2265         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2266                         "2582 FCP Drop IO x%x: err x%x: x%x x%x x%x\n",
2267                         ctxp->oxid, rc,
2268                         atomic_read(&tgtp->rcv_fcp_cmd_in),
2269                         atomic_read(&tgtp->rcv_fcp_cmd_out),
2270                         atomic_read(&tgtp->xmt_fcp_release));
2271         lpfc_nvmeio_data(phba, "NVMET FCP DROP: xri x%x sz %d from %06x\n",
2272                          ctxp->oxid, ctxp->size, ctxp->sid);
2273         spin_lock_irqsave(&ctxp->ctxlock, iflags);
2274         lpfc_nvmet_defer_release(phba, ctxp);
2275         spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2276         lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid, ctxp->oxid);
2277 #endif
2278 }
2279
2280 static void
2281 lpfc_nvmet_fcp_rqst_defer_work(struct work_struct *work)
2282 {
2283 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2284         struct lpfc_nvmet_ctxbuf *ctx_buf =
2285                 container_of(work, struct lpfc_nvmet_ctxbuf, defer_work);
2286
2287         lpfc_nvmet_process_rcv_fcp_req(ctx_buf);
2288 #endif
2289 }
2290
2291 static struct lpfc_nvmet_ctxbuf *
2292 lpfc_nvmet_replenish_context(struct lpfc_hba *phba,
2293                              struct lpfc_nvmet_ctx_info *current_infop)
2294 {
2295 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2296         struct lpfc_nvmet_ctxbuf *ctx_buf = NULL;
2297         struct lpfc_nvmet_ctx_info *get_infop;
2298         int i;
2299
2300         /*
2301          * The current_infop for the MRQ a NVME command IU was received
2302          * on is empty. Our goal is to replenish this MRQs context
2303          * list from a another CPUs.
2304          *
2305          * First we need to pick a context list to start looking on.
2306          * nvmet_ctx_start_cpu has available context the last time
2307          * we needed to replenish this CPU where nvmet_ctx_next_cpu
2308          * is just the next sequential CPU for this MRQ.
2309          */
2310         if (current_infop->nvmet_ctx_start_cpu)
2311                 get_infop = current_infop->nvmet_ctx_start_cpu;
2312         else
2313                 get_infop = current_infop->nvmet_ctx_next_cpu;
2314
2315         for (i = 0; i < phba->sli4_hba.num_possible_cpu; i++) {
2316                 if (get_infop == current_infop) {
2317                         get_infop = get_infop->nvmet_ctx_next_cpu;
2318                         continue;
2319                 }
2320                 spin_lock(&get_infop->nvmet_ctx_list_lock);
2321
2322                 /* Just take the entire context list, if there are any */
2323                 if (get_infop->nvmet_ctx_list_cnt) {
2324                         list_splice_init(&get_infop->nvmet_ctx_list,
2325                                     &current_infop->nvmet_ctx_list);
2326                         current_infop->nvmet_ctx_list_cnt =
2327                                 get_infop->nvmet_ctx_list_cnt - 1;
2328                         get_infop->nvmet_ctx_list_cnt = 0;
2329                         spin_unlock(&get_infop->nvmet_ctx_list_lock);
2330
2331                         current_infop->nvmet_ctx_start_cpu = get_infop;
2332                         list_remove_head(&current_infop->nvmet_ctx_list,
2333                                          ctx_buf, struct lpfc_nvmet_ctxbuf,
2334                                          list);
2335                         return ctx_buf;
2336                 }
2337
2338                 /* Otherwise, move on to the next CPU for this MRQ */
2339                 spin_unlock(&get_infop->nvmet_ctx_list_lock);
2340                 get_infop = get_infop->nvmet_ctx_next_cpu;
2341         }
2342
2343 #endif
2344         /* Nothing found, all contexts for the MRQ are in-flight */
2345         return NULL;
2346 }
2347
2348 /**
2349  * lpfc_nvmet_unsol_fcp_buffer - Process an unsolicited event data buffer
2350  * @phba: pointer to lpfc hba data structure.
2351  * @idx: relative index of MRQ vector
2352  * @nvmebuf: pointer to lpfc nvme command HBQ data structure.
2353  * @isr_timestamp: in jiffies.
2354  * @cqflag: cq processing information regarding workload.
2355  *
2356  * This routine is used for processing the WQE associated with a unsolicited
2357  * event. It first determines whether there is an existing ndlp that matches
2358  * the DID from the unsolicited WQE. If not, it will create a new one with
2359  * the DID from the unsolicited WQE. The ELS command from the unsolicited
2360  * WQE is then used to invoke the proper routine and to set up proper state
2361  * of the discovery state machine.
2362  **/
2363 static void
2364 lpfc_nvmet_unsol_fcp_buffer(struct lpfc_hba *phba,
2365                             uint32_t idx,
2366                             struct rqb_dmabuf *nvmebuf,
2367                             uint64_t isr_timestamp,
2368                             uint8_t cqflag)
2369 {
2370         struct lpfc_async_xchg_ctx *ctxp;
2371         struct lpfc_nvmet_tgtport *tgtp;
2372         struct fc_frame_header *fc_hdr;
2373         struct lpfc_nvmet_ctxbuf *ctx_buf;
2374         struct lpfc_nvmet_ctx_info *current_infop;
2375         uint32_t size, oxid, sid, qno;
2376         unsigned long iflag;
2377         int current_cpu;
2378
2379         if (!IS_ENABLED(CONFIG_NVME_TARGET_FC))
2380                 return;
2381
2382         ctx_buf = NULL;
2383         if (!nvmebuf || !phba->targetport) {
2384                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2385                                 "6157 NVMET FCP Drop IO\n");
2386                 if (nvmebuf)
2387                         lpfc_rq_buf_free(phba, &nvmebuf->hbuf);
2388                 return;
2389         }
2390
2391         /*
2392          * Get a pointer to the context list for this MRQ based on
2393          * the CPU this MRQ IRQ is associated with. If the CPU association
2394          * changes from our initial assumption, the context list could
2395          * be empty, thus it would need to be replenished with the
2396          * context list from another CPU for this MRQ.
2397          */
2398         current_cpu = raw_smp_processor_id();
2399         current_infop = lpfc_get_ctx_list(phba, current_cpu, idx);
2400         spin_lock_irqsave(&current_infop->nvmet_ctx_list_lock, iflag);
2401         if (current_infop->nvmet_ctx_list_cnt) {
2402                 list_remove_head(&current_infop->nvmet_ctx_list,
2403                                  ctx_buf, struct lpfc_nvmet_ctxbuf, list);
2404                 current_infop->nvmet_ctx_list_cnt--;
2405         } else {
2406                 ctx_buf = lpfc_nvmet_replenish_context(phba, current_infop);
2407         }
2408         spin_unlock_irqrestore(&current_infop->nvmet_ctx_list_lock, iflag);
2409
2410         fc_hdr = (struct fc_frame_header *)(nvmebuf->hbuf.virt);
2411         oxid = be16_to_cpu(fc_hdr->fh_ox_id);
2412         size = nvmebuf->bytes_recv;
2413
2414 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2415         if (phba->hdwqstat_on & LPFC_CHECK_NVMET_IO) {
2416                 this_cpu_inc(phba->sli4_hba.c_stat->rcv_io);
2417                 if (idx != current_cpu)
2418                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
2419                                         "6703 CPU Check rcv: "
2420                                         "cpu %d expect %d\n",
2421                                         current_cpu, idx);
2422         }
2423 #endif
2424
2425         lpfc_nvmeio_data(phba, "NVMET FCP  RCV: xri x%x sz %d CPU %02x\n",
2426                          oxid, size, raw_smp_processor_id());
2427
2428         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2429
2430         if (!ctx_buf) {
2431                 /* Queue this NVME IO to process later */
2432                 spin_lock_irqsave(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
2433                 list_add_tail(&nvmebuf->hbuf.list,
2434                               &phba->sli4_hba.lpfc_nvmet_io_wait_list);
2435                 phba->sli4_hba.nvmet_io_wait_cnt++;
2436                 phba->sli4_hba.nvmet_io_wait_total++;
2437                 spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock,
2438                                        iflag);
2439
2440                 /* Post a brand new DMA buffer to RQ */
2441                 qno = nvmebuf->idx;
2442                 lpfc_post_rq_buffer(
2443                         phba, phba->sli4_hba.nvmet_mrq_hdr[qno],
2444                         phba->sli4_hba.nvmet_mrq_data[qno], 1, qno);
2445
2446                 atomic_inc(&tgtp->defer_ctx);
2447                 return;
2448         }
2449
2450         sid = sli4_sid_from_fc_hdr(fc_hdr);
2451
2452         ctxp = (struct lpfc_async_xchg_ctx *)ctx_buf->context;
2453         spin_lock_irqsave(&phba->sli4_hba.t_active_list_lock, iflag);
2454         list_add_tail(&ctxp->list, &phba->sli4_hba.t_active_ctx_list);
2455         spin_unlock_irqrestore(&phba->sli4_hba.t_active_list_lock, iflag);
2456         if (ctxp->state != LPFC_NVME_STE_FREE) {
2457                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2458                                 "6414 NVMET Context corrupt %d %d oxid x%x\n",
2459                                 ctxp->state, ctxp->entry_cnt, ctxp->oxid);
2460         }
2461         ctxp->wqeq = NULL;
2462         ctxp->offset = 0;
2463         ctxp->phba = phba;
2464         ctxp->size = size;
2465         ctxp->oxid = oxid;
2466         ctxp->sid = sid;
2467         ctxp->idx = idx;
2468         ctxp->state = LPFC_NVME_STE_RCV;
2469         ctxp->entry_cnt = 1;
2470         ctxp->flag = 0;
2471         ctxp->ctxbuf = ctx_buf;
2472         ctxp->rqb_buffer = (void *)nvmebuf;
2473         ctxp->hdwq = NULL;
2474         spin_lock_init(&ctxp->ctxlock);
2475
2476 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2477         if (isr_timestamp)
2478                 ctxp->ts_isr_cmd = isr_timestamp;
2479         ctxp->ts_cmd_nvme = 0;
2480         ctxp->ts_nvme_data = 0;
2481         ctxp->ts_data_wqput = 0;
2482         ctxp->ts_isr_data = 0;
2483         ctxp->ts_data_nvme = 0;
2484         ctxp->ts_nvme_status = 0;
2485         ctxp->ts_status_wqput = 0;
2486         ctxp->ts_isr_status = 0;
2487         ctxp->ts_status_nvme = 0;
2488 #endif
2489
2490         atomic_inc(&tgtp->rcv_fcp_cmd_in);
2491         /* check for cq processing load */
2492         if (!cqflag) {
2493                 lpfc_nvmet_process_rcv_fcp_req(ctx_buf);
2494                 return;
2495         }
2496
2497         if (!queue_work(phba->wq, &ctx_buf->defer_work)) {
2498                 atomic_inc(&tgtp->rcv_fcp_cmd_drop);
2499                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2500                                 "6325 Unable to queue work for oxid x%x. "
2501                                 "FCP Drop IO [x%x x%x x%x]\n",
2502                                 ctxp->oxid,
2503                                 atomic_read(&tgtp->rcv_fcp_cmd_in),
2504                                 atomic_read(&tgtp->rcv_fcp_cmd_out),
2505                                 atomic_read(&tgtp->xmt_fcp_release));
2506
2507                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
2508                 lpfc_nvmet_defer_release(phba, ctxp);
2509                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
2510                 lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, sid, oxid);
2511         }
2512 }
2513
2514 /**
2515  * lpfc_nvmet_unsol_fcp_event - Process an unsolicited event from an nvme nport
2516  * @phba: pointer to lpfc hba data structure.
2517  * @idx: relative index of MRQ vector
2518  * @nvmebuf: pointer to received nvme data structure.
2519  * @isr_timestamp: in jiffies.
2520  * @cqflag: cq processing information regarding workload.
2521  *
2522  * This routine is used to process an unsolicited event received from a SLI
2523  * (Service Level Interface) ring. The actual processing of the data buffer
2524  * associated with the unsolicited event is done by invoking the routine
2525  * lpfc_nvmet_unsol_fcp_buffer() after properly set up the buffer from the
2526  * SLI RQ on which the unsolicited event was received.
2527  **/
2528 void
2529 lpfc_nvmet_unsol_fcp_event(struct lpfc_hba *phba,
2530                            uint32_t idx,
2531                            struct rqb_dmabuf *nvmebuf,
2532                            uint64_t isr_timestamp,
2533                            uint8_t cqflag)
2534 {
2535         if (!nvmebuf) {
2536                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2537                                 "3167 NVMET FCP Drop IO\n");
2538                 return;
2539         }
2540         if (phba->nvmet_support == 0) {
2541                 lpfc_rq_buf_free(phba, &nvmebuf->hbuf);
2542                 return;
2543         }
2544         lpfc_nvmet_unsol_fcp_buffer(phba, idx, nvmebuf, isr_timestamp, cqflag);
2545 }
2546
2547 /**
2548  * lpfc_nvmet_prep_ls_wqe - Allocate and prepare a lpfc wqe data structure
2549  * @phba: pointer to a host N_Port data structure.
2550  * @ctxp: Context info for NVME LS Request
2551  * @rspbuf: DMA buffer of NVME command.
2552  * @rspsize: size of the NVME command.
2553  *
2554  * This routine is used for allocating a lpfc-WQE data structure from
2555  * the driver lpfc-WQE free-list and prepare the WQE with the parameters
2556  * passed into the routine for discovery state machine to issue an Extended
2557  * Link Service (NVME) commands. It is a generic lpfc-WQE allocation
2558  * and preparation routine that is used by all the discovery state machine
2559  * routines and the NVME command-specific fields will be later set up by
2560  * the individual discovery machine routines after calling this routine
2561  * allocating and preparing a generic WQE data structure. It fills in the
2562  * Buffer Descriptor Entries (BDEs), allocates buffers for both command
2563  * payload and response payload (if expected). The reference count on the
2564  * ndlp is incremented by 1 and the reference to the ndlp is put into
2565  * context1 of the WQE data structure for this WQE to hold the ndlp
2566  * reference for the command's callback function to access later.
2567  *
2568  * Return code
2569  *   Pointer to the newly allocated/prepared nvme wqe data structure
2570  *   NULL - when nvme wqe data structure allocation/preparation failed
2571  **/
2572 static struct lpfc_iocbq *
2573 lpfc_nvmet_prep_ls_wqe(struct lpfc_hba *phba,
2574                        struct lpfc_async_xchg_ctx *ctxp,
2575                        dma_addr_t rspbuf, uint16_t rspsize)
2576 {
2577         struct lpfc_nodelist *ndlp;
2578         struct lpfc_iocbq *nvmewqe;
2579         union lpfc_wqe128 *wqe;
2580
2581         if (!lpfc_is_link_up(phba)) {
2582                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2583                                 "6104 NVMET prep LS wqe: link err: "
2584                                 "NPORT x%x oxid:x%x ste %d\n",
2585                                 ctxp->sid, ctxp->oxid, ctxp->state);
2586                 return NULL;
2587         }
2588
2589         /* Allocate buffer for  command wqe */
2590         nvmewqe = lpfc_sli_get_iocbq(phba);
2591         if (nvmewqe == NULL) {
2592                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2593                                 "6105 NVMET prep LS wqe: No WQE: "
2594                                 "NPORT x%x oxid x%x ste %d\n",
2595                                 ctxp->sid, ctxp->oxid, ctxp->state);
2596                 return NULL;
2597         }
2598
2599         ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
2600         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
2601             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
2602             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
2603                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2604                                 "6106 NVMET prep LS wqe: No ndlp: "
2605                                 "NPORT x%x oxid x%x ste %d\n",
2606                                 ctxp->sid, ctxp->oxid, ctxp->state);
2607                 goto nvme_wqe_free_wqeq_exit;
2608         }
2609         ctxp->wqeq = nvmewqe;
2610
2611         /* prevent preparing wqe with NULL ndlp reference */
2612         nvmewqe->context1 = lpfc_nlp_get(ndlp);
2613         if (nvmewqe->context1 == NULL)
2614                 goto nvme_wqe_free_wqeq_exit;
2615         nvmewqe->context2 = ctxp;
2616
2617         wqe = &nvmewqe->wqe;
2618         memset(wqe, 0, sizeof(union lpfc_wqe));
2619
2620         /* Words 0 - 2 */
2621         wqe->xmit_sequence.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2622         wqe->xmit_sequence.bde.tus.f.bdeSize = rspsize;
2623         wqe->xmit_sequence.bde.addrLow = le32_to_cpu(putPaddrLow(rspbuf));
2624         wqe->xmit_sequence.bde.addrHigh = le32_to_cpu(putPaddrHigh(rspbuf));
2625
2626         /* Word 3 */
2627
2628         /* Word 4 */
2629
2630         /* Word 5 */
2631         bf_set(wqe_dfctl, &wqe->xmit_sequence.wge_ctl, 0);
2632         bf_set(wqe_ls, &wqe->xmit_sequence.wge_ctl, 1);
2633         bf_set(wqe_la, &wqe->xmit_sequence.wge_ctl, 0);
2634         bf_set(wqe_rctl, &wqe->xmit_sequence.wge_ctl, FC_RCTL_ELS4_REP);
2635         bf_set(wqe_type, &wqe->xmit_sequence.wge_ctl, FC_TYPE_NVME);
2636
2637         /* Word 6 */
2638         bf_set(wqe_ctxt_tag, &wqe->xmit_sequence.wqe_com,
2639                phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2640         bf_set(wqe_xri_tag, &wqe->xmit_sequence.wqe_com, nvmewqe->sli4_xritag);
2641
2642         /* Word 7 */
2643         bf_set(wqe_cmnd, &wqe->xmit_sequence.wqe_com,
2644                CMD_XMIT_SEQUENCE64_WQE);
2645         bf_set(wqe_ct, &wqe->xmit_sequence.wqe_com, SLI4_CT_RPI);
2646         bf_set(wqe_class, &wqe->xmit_sequence.wqe_com, CLASS3);
2647         bf_set(wqe_pu, &wqe->xmit_sequence.wqe_com, 0);
2648
2649         /* Word 8 */
2650         wqe->xmit_sequence.wqe_com.abort_tag = nvmewqe->iotag;
2651
2652         /* Word 9 */
2653         bf_set(wqe_reqtag, &wqe->xmit_sequence.wqe_com, nvmewqe->iotag);
2654         /* Needs to be set by caller */
2655         bf_set(wqe_rcvoxid, &wqe->xmit_sequence.wqe_com, ctxp->oxid);
2656
2657         /* Word 10 */
2658         bf_set(wqe_dbde, &wqe->xmit_sequence.wqe_com, 1);
2659         bf_set(wqe_iod, &wqe->xmit_sequence.wqe_com, LPFC_WQE_IOD_WRITE);
2660         bf_set(wqe_lenloc, &wqe->xmit_sequence.wqe_com,
2661                LPFC_WQE_LENLOC_WORD12);
2662         bf_set(wqe_ebde_cnt, &wqe->xmit_sequence.wqe_com, 0);
2663
2664         /* Word 11 */
2665         bf_set(wqe_cqid, &wqe->xmit_sequence.wqe_com,
2666                LPFC_WQE_CQ_ID_DEFAULT);
2667         bf_set(wqe_cmd_type, &wqe->xmit_sequence.wqe_com,
2668                OTHER_COMMAND);
2669
2670         /* Word 12 */
2671         wqe->xmit_sequence.xmit_len = rspsize;
2672
2673         nvmewqe->retry = 1;
2674         nvmewqe->vport = phba->pport;
2675         nvmewqe->drvrTimeout = (phba->fc_ratov * 3) + LPFC_DRVR_TIMEOUT;
2676         nvmewqe->iocb_flag |= LPFC_IO_NVME_LS;
2677
2678         /* Xmit NVMET response to remote NPORT <did> */
2679         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
2680                         "6039 Xmit NVMET LS response to remote "
2681                         "NPORT x%x iotag:x%x oxid:x%x size:x%x\n",
2682                         ndlp->nlp_DID, nvmewqe->iotag, ctxp->oxid,
2683                         rspsize);
2684         return nvmewqe;
2685
2686 nvme_wqe_free_wqeq_exit:
2687         nvmewqe->context2 = NULL;
2688         nvmewqe->context3 = NULL;
2689         lpfc_sli_release_iocbq(phba, nvmewqe);
2690         return NULL;
2691 }
2692
2693
2694 static struct lpfc_iocbq *
2695 lpfc_nvmet_prep_fcp_wqe(struct lpfc_hba *phba,
2696                         struct lpfc_async_xchg_ctx *ctxp)
2697 {
2698         struct nvmefc_tgt_fcp_req *rsp = &ctxp->hdlrctx.fcp_req;
2699         struct lpfc_nvmet_tgtport *tgtp;
2700         struct sli4_sge *sgl;
2701         struct lpfc_nodelist *ndlp;
2702         struct lpfc_iocbq *nvmewqe;
2703         struct scatterlist *sgel;
2704         union lpfc_wqe128 *wqe;
2705         struct ulp_bde64 *bde;
2706         dma_addr_t physaddr;
2707         int i, cnt, nsegs;
2708         int do_pbde;
2709         int xc = 1;
2710
2711         if (!lpfc_is_link_up(phba)) {
2712                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2713                                 "6107 NVMET prep FCP wqe: link err:"
2714                                 "NPORT x%x oxid x%x ste %d\n",
2715                                 ctxp->sid, ctxp->oxid, ctxp->state);
2716                 return NULL;
2717         }
2718
2719         ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
2720         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
2721             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
2722              (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
2723                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2724                                 "6108 NVMET prep FCP wqe: no ndlp: "
2725                                 "NPORT x%x oxid x%x ste %d\n",
2726                                 ctxp->sid, ctxp->oxid, ctxp->state);
2727                 return NULL;
2728         }
2729
2730         if (rsp->sg_cnt > lpfc_tgttemplate.max_sgl_segments) {
2731                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2732                                 "6109 NVMET prep FCP wqe: seg cnt err: "
2733                                 "NPORT x%x oxid x%x ste %d cnt %d\n",
2734                                 ctxp->sid, ctxp->oxid, ctxp->state,
2735                                 phba->cfg_nvme_seg_cnt);
2736                 return NULL;
2737         }
2738         nsegs = rsp->sg_cnt;
2739
2740         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2741         nvmewqe = ctxp->wqeq;
2742         if (nvmewqe == NULL) {
2743                 /* Allocate buffer for  command wqe */
2744                 nvmewqe = ctxp->ctxbuf->iocbq;
2745                 if (nvmewqe == NULL) {
2746                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2747                                         "6110 NVMET prep FCP wqe: No "
2748                                         "WQE: NPORT x%x oxid x%x ste %d\n",
2749                                         ctxp->sid, ctxp->oxid, ctxp->state);
2750                         return NULL;
2751                 }
2752                 ctxp->wqeq = nvmewqe;
2753                 xc = 0; /* create new XRI */
2754                 nvmewqe->sli4_lxritag = NO_XRI;
2755                 nvmewqe->sli4_xritag = NO_XRI;
2756         }
2757
2758         /* Sanity check */
2759         if (((ctxp->state == LPFC_NVME_STE_RCV) &&
2760             (ctxp->entry_cnt == 1)) ||
2761             (ctxp->state == LPFC_NVME_STE_DATA)) {
2762                 wqe = &nvmewqe->wqe;
2763         } else {
2764                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2765                                 "6111 Wrong state NVMET FCP: %d  cnt %d\n",
2766                                 ctxp->state, ctxp->entry_cnt);
2767                 return NULL;
2768         }
2769
2770         sgl  = (struct sli4_sge *)ctxp->ctxbuf->sglq->sgl;
2771         switch (rsp->op) {
2772         case NVMET_FCOP_READDATA:
2773         case NVMET_FCOP_READDATA_RSP:
2774                 /* From the tsend template, initialize words 7 - 11 */
2775                 memcpy(&wqe->words[7],
2776                        &lpfc_tsend_cmd_template.words[7],
2777                        sizeof(uint32_t) * 5);
2778
2779                 /* Words 0 - 2 : The first sg segment */
2780                 sgel = &rsp->sg[0];
2781                 physaddr = sg_dma_address(sgel);
2782                 wqe->fcp_tsend.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2783                 wqe->fcp_tsend.bde.tus.f.bdeSize = sg_dma_len(sgel);
2784                 wqe->fcp_tsend.bde.addrLow = cpu_to_le32(putPaddrLow(physaddr));
2785                 wqe->fcp_tsend.bde.addrHigh =
2786                         cpu_to_le32(putPaddrHigh(physaddr));
2787
2788                 /* Word 3 */
2789                 wqe->fcp_tsend.payload_offset_len = 0;
2790
2791                 /* Word 4 */
2792                 wqe->fcp_tsend.relative_offset = ctxp->offset;
2793
2794                 /* Word 5 */
2795                 wqe->fcp_tsend.reserved = 0;
2796
2797                 /* Word 6 */
2798                 bf_set(wqe_ctxt_tag, &wqe->fcp_tsend.wqe_com,
2799                        phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2800                 bf_set(wqe_xri_tag, &wqe->fcp_tsend.wqe_com,
2801                        nvmewqe->sli4_xritag);
2802
2803                 /* Word 7 - set ar later */
2804
2805                 /* Word 8 */
2806                 wqe->fcp_tsend.wqe_com.abort_tag = nvmewqe->iotag;
2807
2808                 /* Word 9 */
2809                 bf_set(wqe_reqtag, &wqe->fcp_tsend.wqe_com, nvmewqe->iotag);
2810                 bf_set(wqe_rcvoxid, &wqe->fcp_tsend.wqe_com, ctxp->oxid);
2811
2812                 /* Word 10 - set wqes later, in template xc=1 */
2813                 if (!xc)
2814                         bf_set(wqe_xc, &wqe->fcp_tsend.wqe_com, 0);
2815
2816                 /* Word 11 - set sup, irsp, irsplen later */
2817                 do_pbde = 0;
2818
2819                 /* Word 12 */
2820                 wqe->fcp_tsend.fcp_data_len = rsp->transfer_length;
2821
2822                 /* Setup 2 SKIP SGEs */
2823                 sgl->addr_hi = 0;
2824                 sgl->addr_lo = 0;
2825                 sgl->word2 = 0;
2826                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2827                 sgl->word2 = cpu_to_le32(sgl->word2);
2828                 sgl->sge_len = 0;
2829                 sgl++;
2830                 sgl->addr_hi = 0;
2831                 sgl->addr_lo = 0;
2832                 sgl->word2 = 0;
2833                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2834                 sgl->word2 = cpu_to_le32(sgl->word2);
2835                 sgl->sge_len = 0;
2836                 sgl++;
2837                 if (rsp->op == NVMET_FCOP_READDATA_RSP) {
2838                         atomic_inc(&tgtp->xmt_fcp_read_rsp);
2839
2840                         /* In template ar=1 wqes=0 sup=0 irsp=0 irsplen=0 */
2841
2842                         if (rsp->rsplen == LPFC_NVMET_SUCCESS_LEN) {
2843                                 if (ndlp->nlp_flag & NLP_SUPPRESS_RSP)
2844                                         bf_set(wqe_sup,
2845                                                &wqe->fcp_tsend.wqe_com, 1);
2846                         } else {
2847                                 bf_set(wqe_wqes, &wqe->fcp_tsend.wqe_com, 1);
2848                                 bf_set(wqe_irsp, &wqe->fcp_tsend.wqe_com, 1);
2849                                 bf_set(wqe_irsplen, &wqe->fcp_tsend.wqe_com,
2850                                        ((rsp->rsplen >> 2) - 1));
2851                                 memcpy(&wqe->words[16], rsp->rspaddr,
2852                                        rsp->rsplen);
2853                         }
2854                 } else {
2855                         atomic_inc(&tgtp->xmt_fcp_read);
2856
2857                         /* In template ar=1 wqes=0 sup=0 irsp=0 irsplen=0 */
2858                         bf_set(wqe_ar, &wqe->fcp_tsend.wqe_com, 0);
2859                 }
2860                 break;
2861
2862         case NVMET_FCOP_WRITEDATA:
2863                 /* From the treceive template, initialize words 3 - 11 */
2864                 memcpy(&wqe->words[3],
2865                        &lpfc_treceive_cmd_template.words[3],
2866                        sizeof(uint32_t) * 9);
2867
2868                 /* Words 0 - 2 : First SGE is skipped, set invalid BDE type */
2869                 wqe->fcp_treceive.bde.tus.f.bdeFlags = LPFC_SGE_TYPE_SKIP;
2870                 wqe->fcp_treceive.bde.tus.f.bdeSize = 0;
2871                 wqe->fcp_treceive.bde.addrLow = 0;
2872                 wqe->fcp_treceive.bde.addrHigh = 0;
2873
2874                 /* Word 4 */
2875                 wqe->fcp_treceive.relative_offset = ctxp->offset;
2876
2877                 /* Word 6 */
2878                 bf_set(wqe_ctxt_tag, &wqe->fcp_treceive.wqe_com,
2879                        phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2880                 bf_set(wqe_xri_tag, &wqe->fcp_treceive.wqe_com,
2881                        nvmewqe->sli4_xritag);
2882
2883                 /* Word 7 */
2884
2885                 /* Word 8 */
2886                 wqe->fcp_treceive.wqe_com.abort_tag = nvmewqe->iotag;
2887
2888                 /* Word 9 */
2889                 bf_set(wqe_reqtag, &wqe->fcp_treceive.wqe_com, nvmewqe->iotag);
2890                 bf_set(wqe_rcvoxid, &wqe->fcp_treceive.wqe_com, ctxp->oxid);
2891
2892                 /* Word 10 - in template xc=1 */
2893                 if (!xc)
2894                         bf_set(wqe_xc, &wqe->fcp_treceive.wqe_com, 0);
2895
2896                 /* Word 11 - set pbde later */
2897                 if (phba->cfg_enable_pbde) {
2898                         do_pbde = 1;
2899                 } else {
2900                         bf_set(wqe_pbde, &wqe->fcp_treceive.wqe_com, 0);
2901                         do_pbde = 0;
2902                 }
2903
2904                 /* Word 12 */
2905                 wqe->fcp_tsend.fcp_data_len = rsp->transfer_length;
2906
2907                 /* Setup 2 SKIP SGEs */
2908                 sgl->addr_hi = 0;
2909                 sgl->addr_lo = 0;
2910                 sgl->word2 = 0;
2911                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2912                 sgl->word2 = cpu_to_le32(sgl->word2);
2913                 sgl->sge_len = 0;
2914                 sgl++;
2915                 sgl->addr_hi = 0;
2916                 sgl->addr_lo = 0;
2917                 sgl->word2 = 0;
2918                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2919                 sgl->word2 = cpu_to_le32(sgl->word2);
2920                 sgl->sge_len = 0;
2921                 sgl++;
2922                 atomic_inc(&tgtp->xmt_fcp_write);
2923                 break;
2924
2925         case NVMET_FCOP_RSP:
2926                 /* From the treceive template, initialize words 4 - 11 */
2927                 memcpy(&wqe->words[4],
2928                        &lpfc_trsp_cmd_template.words[4],
2929                        sizeof(uint32_t) * 8);
2930
2931                 /* Words 0 - 2 */
2932                 physaddr = rsp->rspdma;
2933                 wqe->fcp_trsp.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2934                 wqe->fcp_trsp.bde.tus.f.bdeSize = rsp->rsplen;
2935                 wqe->fcp_trsp.bde.addrLow =
2936                         cpu_to_le32(putPaddrLow(physaddr));
2937                 wqe->fcp_trsp.bde.addrHigh =
2938                         cpu_to_le32(putPaddrHigh(physaddr));
2939
2940                 /* Word 3 */
2941                 wqe->fcp_trsp.response_len = rsp->rsplen;
2942
2943                 /* Word 6 */
2944                 bf_set(wqe_ctxt_tag, &wqe->fcp_trsp.wqe_com,
2945                        phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2946                 bf_set(wqe_xri_tag, &wqe->fcp_trsp.wqe_com,
2947                        nvmewqe->sli4_xritag);
2948
2949                 /* Word 7 */
2950
2951                 /* Word 8 */
2952                 wqe->fcp_trsp.wqe_com.abort_tag = nvmewqe->iotag;
2953
2954                 /* Word 9 */
2955                 bf_set(wqe_reqtag, &wqe->fcp_trsp.wqe_com, nvmewqe->iotag);
2956                 bf_set(wqe_rcvoxid, &wqe->fcp_trsp.wqe_com, ctxp->oxid);
2957
2958                 /* Word 10 */
2959                 if (xc)
2960                         bf_set(wqe_xc, &wqe->fcp_trsp.wqe_com, 1);
2961
2962                 /* Word 11 */
2963                 /* In template wqes=0 irsp=0 irsplen=0 - good response */
2964                 if (rsp->rsplen != LPFC_NVMET_SUCCESS_LEN) {
2965                         /* Bad response - embed it */
2966                         bf_set(wqe_wqes, &wqe->fcp_trsp.wqe_com, 1);
2967                         bf_set(wqe_irsp, &wqe->fcp_trsp.wqe_com, 1);
2968                         bf_set(wqe_irsplen, &wqe->fcp_trsp.wqe_com,
2969                                ((rsp->rsplen >> 2) - 1));
2970                         memcpy(&wqe->words[16], rsp->rspaddr, rsp->rsplen);
2971                 }
2972                 do_pbde = 0;
2973
2974                 /* Word 12 */
2975                 wqe->fcp_trsp.rsvd_12_15[0] = 0;
2976
2977                 /* Use rspbuf, NOT sg list */
2978                 nsegs = 0;
2979                 sgl->word2 = 0;
2980                 atomic_inc(&tgtp->xmt_fcp_rsp);
2981                 break;
2982
2983         default:
2984                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
2985                                 "6064 Unknown Rsp Op %d\n",
2986                                 rsp->op);
2987                 return NULL;
2988         }
2989
2990         nvmewqe->retry = 1;
2991         nvmewqe->vport = phba->pport;
2992         nvmewqe->drvrTimeout = (phba->fc_ratov * 3) + LPFC_DRVR_TIMEOUT;
2993         nvmewqe->context1 = ndlp;
2994
2995         for_each_sg(rsp->sg, sgel, nsegs, i) {
2996                 physaddr = sg_dma_address(sgel);
2997                 cnt = sg_dma_len(sgel);
2998                 sgl->addr_hi = putPaddrHigh(physaddr);
2999                 sgl->addr_lo = putPaddrLow(physaddr);
3000                 sgl->word2 = 0;
3001                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
3002                 bf_set(lpfc_sli4_sge_offset, sgl, ctxp->offset);
3003                 if ((i+1) == rsp->sg_cnt)
3004                         bf_set(lpfc_sli4_sge_last, sgl, 1);
3005                 sgl->word2 = cpu_to_le32(sgl->word2);
3006                 sgl->sge_len = cpu_to_le32(cnt);
3007                 if (i == 0) {
3008                         bde = (struct ulp_bde64 *)&wqe->words[13];
3009                         if (do_pbde) {
3010                                 /* Words 13-15  (PBDE) */
3011                                 bde->addrLow = sgl->addr_lo;
3012                                 bde->addrHigh = sgl->addr_hi;
3013                                 bde->tus.f.bdeSize =
3014                                         le32_to_cpu(sgl->sge_len);
3015                                 bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
3016                                 bde->tus.w = cpu_to_le32(bde->tus.w);
3017                         } else {
3018                                 memset(bde, 0, sizeof(struct ulp_bde64));
3019                         }
3020                 }
3021                 sgl++;
3022                 ctxp->offset += cnt;
3023         }
3024         ctxp->state = LPFC_NVME_STE_DATA;
3025         ctxp->entry_cnt++;
3026         return nvmewqe;
3027 }
3028
3029 /**
3030  * lpfc_nvmet_sol_fcp_abort_cmp - Completion handler for ABTS
3031  * @phba: Pointer to HBA context object.
3032  * @cmdwqe: Pointer to driver command WQE object.
3033  * @wcqe: Pointer to driver response CQE object.
3034  *
3035  * The function is called from SLI ring event handler with no
3036  * lock held. This function is the completion handler for NVME ABTS for FCP cmds
3037  * The function frees memory resources used for the NVME commands.
3038  **/
3039 static void
3040 lpfc_nvmet_sol_fcp_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3041                              struct lpfc_wcqe_complete *wcqe)
3042 {
3043         struct lpfc_async_xchg_ctx *ctxp;
3044         struct lpfc_nvmet_tgtport *tgtp;
3045         uint32_t result;
3046         unsigned long flags;
3047         bool released = false;
3048
3049         ctxp = cmdwqe->context2;
3050         result = wcqe->parameter;
3051
3052         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3053         if (ctxp->flag & LPFC_NVME_ABORT_OP)
3054                 atomic_inc(&tgtp->xmt_fcp_abort_cmpl);
3055
3056         spin_lock_irqsave(&ctxp->ctxlock, flags);
3057         ctxp->state = LPFC_NVME_STE_DONE;
3058
3059         /* Check if we already received a free context call
3060          * and we have completed processing an abort situation.
3061          */
3062         if ((ctxp->flag & LPFC_NVME_CTX_RLS) &&
3063             !(ctxp->flag & LPFC_NVME_XBUSY)) {
3064                 spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3065                 list_del_init(&ctxp->list);
3066                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3067                 released = true;
3068         }
3069         ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3070         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3071         atomic_inc(&tgtp->xmt_abort_rsp);
3072
3073         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3074                         "6165 ABORT cmpl: oxid x%x flg x%x (%d) "
3075                         "WCQE: %08x %08x %08x %08x\n",
3076                         ctxp->oxid, ctxp->flag, released,
3077                         wcqe->word0, wcqe->total_data_placed,
3078                         result, wcqe->word3);
3079
3080         cmdwqe->context2 = NULL;
3081         cmdwqe->context3 = NULL;
3082         /*
3083          * if transport has released ctx, then can reuse it. Otherwise,
3084          * will be recycled by transport release call.
3085          */
3086         if (released)
3087                 lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
3088
3089         /* This is the iocbq for the abort, not the command */
3090         lpfc_sli_release_iocbq(phba, cmdwqe);
3091
3092         /* Since iaab/iaar are NOT set, there is no work left.
3093          * For LPFC_NVME_XBUSY, lpfc_sli4_nvmet_xri_aborted
3094          * should have been called already.
3095          */
3096 }
3097
3098 /**
3099  * lpfc_nvmet_unsol_fcp_abort_cmp - Completion handler for ABTS
3100  * @phba: Pointer to HBA context object.
3101  * @cmdwqe: Pointer to driver command WQE object.
3102  * @wcqe: Pointer to driver response CQE object.
3103  *
3104  * The function is called from SLI ring event handler with no
3105  * lock held. This function is the completion handler for NVME ABTS for FCP cmds
3106  * The function frees memory resources used for the NVME commands.
3107  **/
3108 static void
3109 lpfc_nvmet_unsol_fcp_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3110                                struct lpfc_wcqe_complete *wcqe)
3111 {
3112         struct lpfc_async_xchg_ctx *ctxp;
3113         struct lpfc_nvmet_tgtport *tgtp;
3114         unsigned long flags;
3115         uint32_t result;
3116         bool released = false;
3117
3118         ctxp = cmdwqe->context2;
3119         result = wcqe->parameter;
3120
3121         if (!ctxp) {
3122                 /* if context is clear, related io alrady complete */
3123                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3124                                 "6070 ABTS cmpl: WCQE: %08x %08x %08x %08x\n",
3125                                 wcqe->word0, wcqe->total_data_placed,
3126                                 result, wcqe->word3);
3127                 return;
3128         }
3129
3130         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3131         spin_lock_irqsave(&ctxp->ctxlock, flags);
3132         if (ctxp->flag & LPFC_NVME_ABORT_OP)
3133                 atomic_inc(&tgtp->xmt_fcp_abort_cmpl);
3134
3135         /* Sanity check */
3136         if (ctxp->state != LPFC_NVME_STE_ABORT) {
3137                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3138                                 "6112 ABTS Wrong state:%d oxid x%x\n",
3139                                 ctxp->state, ctxp->oxid);
3140         }
3141
3142         /* Check if we already received a free context call
3143          * and we have completed processing an abort situation.
3144          */
3145         ctxp->state = LPFC_NVME_STE_DONE;
3146         if ((ctxp->flag & LPFC_NVME_CTX_RLS) &&
3147             !(ctxp->flag & LPFC_NVME_XBUSY)) {
3148                 spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3149                 list_del_init(&ctxp->list);
3150                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3151                 released = true;
3152         }
3153         ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3154         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3155         atomic_inc(&tgtp->xmt_abort_rsp);
3156
3157         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3158                         "6316 ABTS cmpl oxid x%x flg x%x (%x) "
3159                         "WCQE: %08x %08x %08x %08x\n",
3160                         ctxp->oxid, ctxp->flag, released,
3161                         wcqe->word0, wcqe->total_data_placed,
3162                         result, wcqe->word3);
3163
3164         cmdwqe->context2 = NULL;
3165         cmdwqe->context3 = NULL;
3166         /*
3167          * if transport has released ctx, then can reuse it. Otherwise,
3168          * will be recycled by transport release call.
3169          */
3170         if (released)
3171                 lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
3172
3173         /* Since iaab/iaar are NOT set, there is no work left.
3174          * For LPFC_NVME_XBUSY, lpfc_sli4_nvmet_xri_aborted
3175          * should have been called already.
3176          */
3177 }
3178
3179 /**
3180  * lpfc_nvmet_xmt_ls_abort_cmp - Completion handler for ABTS
3181  * @phba: Pointer to HBA context object.
3182  * @cmdwqe: Pointer to driver command WQE object.
3183  * @wcqe: Pointer to driver response CQE object.
3184  *
3185  * The function is called from SLI ring event handler with no
3186  * lock held. This function is the completion handler for NVME ABTS for LS cmds
3187  * The function frees memory resources used for the NVME commands.
3188  **/
3189 static void
3190 lpfc_nvmet_xmt_ls_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3191                             struct lpfc_wcqe_complete *wcqe)
3192 {
3193         struct lpfc_async_xchg_ctx *ctxp;
3194         struct lpfc_nvmet_tgtport *tgtp;
3195         uint32_t result;
3196
3197         ctxp = cmdwqe->context2;
3198         result = wcqe->parameter;
3199
3200         if (phba->nvmet_support) {
3201                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3202                 atomic_inc(&tgtp->xmt_ls_abort_cmpl);
3203         }
3204
3205         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3206                         "6083 Abort cmpl: ctx x%px WCQE:%08x %08x %08x %08x\n",
3207                         ctxp, wcqe->word0, wcqe->total_data_placed,
3208                         result, wcqe->word3);
3209
3210         if (!ctxp) {
3211                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3212                                 "6415 NVMET LS Abort No ctx: WCQE: "
3213                                  "%08x %08x %08x %08x\n",
3214                                 wcqe->word0, wcqe->total_data_placed,
3215                                 result, wcqe->word3);
3216
3217                 lpfc_sli_release_iocbq(phba, cmdwqe);
3218                 return;
3219         }
3220
3221         if (ctxp->state != LPFC_NVME_STE_LS_ABORT) {
3222                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3223                                 "6416 NVMET LS abort cmpl state mismatch: "
3224                                 "oxid x%x: %d %d\n",
3225                                 ctxp->oxid, ctxp->state, ctxp->entry_cnt);
3226         }
3227
3228         cmdwqe->context2 = NULL;
3229         cmdwqe->context3 = NULL;
3230         lpfc_sli_release_iocbq(phba, cmdwqe);
3231         kfree(ctxp);
3232 }
3233
3234 static int
3235 lpfc_nvmet_unsol_issue_abort(struct lpfc_hba *phba,
3236                              struct lpfc_async_xchg_ctx *ctxp,
3237                              uint32_t sid, uint16_t xri)
3238 {
3239         struct lpfc_nvmet_tgtport *tgtp = NULL;
3240         struct lpfc_iocbq *abts_wqeq;
3241         union lpfc_wqe128 *wqe_abts;
3242         struct lpfc_nodelist *ndlp;
3243
3244         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3245                         "6067 ABTS: sid %x xri x%x/x%x\n",
3246                         sid, xri, ctxp->wqeq->sli4_xritag);
3247
3248         if (phba->nvmet_support && phba->targetport)
3249                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3250
3251         ndlp = lpfc_findnode_did(phba->pport, sid);
3252         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
3253             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
3254             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
3255                 if (tgtp)
3256                         atomic_inc(&tgtp->xmt_abort_rsp_error);
3257                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3258                                 "6134 Drop ABTS - wrong NDLP state x%x.\n",
3259                                 (ndlp) ? ndlp->nlp_state : NLP_STE_MAX_STATE);
3260
3261                 /* No failure to an ABTS request. */
3262                 return 0;
3263         }
3264
3265         abts_wqeq = ctxp->wqeq;
3266         wqe_abts = &abts_wqeq->wqe;
3267
3268         /*
3269          * Since we zero the whole WQE, we need to ensure we set the WQE fields
3270          * that were initialized in lpfc_sli4_nvmet_alloc.
3271          */
3272         memset(wqe_abts, 0, sizeof(union lpfc_wqe));
3273
3274         /* Word 5 */
3275         bf_set(wqe_dfctl, &wqe_abts->xmit_sequence.wge_ctl, 0);
3276         bf_set(wqe_ls, &wqe_abts->xmit_sequence.wge_ctl, 1);
3277         bf_set(wqe_la, &wqe_abts->xmit_sequence.wge_ctl, 0);
3278         bf_set(wqe_rctl, &wqe_abts->xmit_sequence.wge_ctl, FC_RCTL_BA_ABTS);
3279         bf_set(wqe_type, &wqe_abts->xmit_sequence.wge_ctl, FC_TYPE_BLS);
3280
3281         /* Word 6 */
3282         bf_set(wqe_ctxt_tag, &wqe_abts->xmit_sequence.wqe_com,
3283                phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
3284         bf_set(wqe_xri_tag, &wqe_abts->xmit_sequence.wqe_com,
3285                abts_wqeq->sli4_xritag);
3286
3287         /* Word 7 */
3288         bf_set(wqe_cmnd, &wqe_abts->xmit_sequence.wqe_com,
3289                CMD_XMIT_SEQUENCE64_WQE);
3290         bf_set(wqe_ct, &wqe_abts->xmit_sequence.wqe_com, SLI4_CT_RPI);
3291         bf_set(wqe_class, &wqe_abts->xmit_sequence.wqe_com, CLASS3);
3292         bf_set(wqe_pu, &wqe_abts->xmit_sequence.wqe_com, 0);
3293
3294         /* Word 8 */
3295         wqe_abts->xmit_sequence.wqe_com.abort_tag = abts_wqeq->iotag;
3296
3297         /* Word 9 */
3298         bf_set(wqe_reqtag, &wqe_abts->xmit_sequence.wqe_com, abts_wqeq->iotag);
3299         /* Needs to be set by caller */
3300         bf_set(wqe_rcvoxid, &wqe_abts->xmit_sequence.wqe_com, xri);
3301
3302         /* Word 10 */
3303         bf_set(wqe_iod, &wqe_abts->xmit_sequence.wqe_com, LPFC_WQE_IOD_WRITE);
3304         bf_set(wqe_lenloc, &wqe_abts->xmit_sequence.wqe_com,
3305                LPFC_WQE_LENLOC_WORD12);
3306         bf_set(wqe_ebde_cnt, &wqe_abts->xmit_sequence.wqe_com, 0);
3307         bf_set(wqe_qosd, &wqe_abts->xmit_sequence.wqe_com, 0);
3308
3309         /* Word 11 */
3310         bf_set(wqe_cqid, &wqe_abts->xmit_sequence.wqe_com,
3311                LPFC_WQE_CQ_ID_DEFAULT);
3312         bf_set(wqe_cmd_type, &wqe_abts->xmit_sequence.wqe_com,
3313                OTHER_COMMAND);
3314
3315         abts_wqeq->vport = phba->pport;
3316         abts_wqeq->context1 = ndlp;
3317         abts_wqeq->context2 = ctxp;
3318         abts_wqeq->context3 = NULL;
3319         abts_wqeq->rsvd2 = 0;
3320         /* hba_wqidx should already be setup from command we are aborting */
3321         abts_wqeq->iocb.ulpCommand = CMD_XMIT_SEQUENCE64_CR;
3322         abts_wqeq->iocb.ulpLe = 1;
3323
3324         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3325                         "6069 Issue ABTS to xri x%x reqtag x%x\n",
3326                         xri, abts_wqeq->iotag);
3327         return 1;
3328 }
3329
3330 static int
3331 lpfc_nvmet_sol_fcp_issue_abort(struct lpfc_hba *phba,
3332                                struct lpfc_async_xchg_ctx *ctxp,
3333                                uint32_t sid, uint16_t xri)
3334 {
3335         struct lpfc_nvmet_tgtport *tgtp;
3336         struct lpfc_iocbq *abts_wqeq;
3337         struct lpfc_nodelist *ndlp;
3338         unsigned long flags;
3339         u8 opt;
3340         int rc;
3341
3342         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3343         if (!ctxp->wqeq) {
3344                 ctxp->wqeq = ctxp->ctxbuf->iocbq;
3345                 ctxp->wqeq->hba_wqidx = 0;
3346         }
3347
3348         ndlp = lpfc_findnode_did(phba->pport, sid);
3349         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
3350             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
3351             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
3352                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3353                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3354                                 "6160 Drop ABORT - wrong NDLP state x%x.\n",
3355                                 (ndlp) ? ndlp->nlp_state : NLP_STE_MAX_STATE);
3356
3357                 /* No failure to an ABTS request. */
3358                 spin_lock_irqsave(&ctxp->ctxlock, flags);
3359                 ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3360                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3361                 return 0;
3362         }
3363
3364         /* Issue ABTS for this WQE based on iotag */
3365         ctxp->abort_wqeq = lpfc_sli_get_iocbq(phba);
3366         spin_lock_irqsave(&ctxp->ctxlock, flags);
3367         if (!ctxp->abort_wqeq) {
3368                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3369                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3370                                 "6161 ABORT failed: No wqeqs: "
3371                                 "xri: x%x\n", ctxp->oxid);
3372                 /* No failure to an ABTS request. */
3373                 ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3374                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3375                 return 0;
3376         }
3377         abts_wqeq = ctxp->abort_wqeq;
3378         ctxp->state = LPFC_NVME_STE_ABORT;
3379         opt = (ctxp->flag & LPFC_NVME_ABTS_RCV) ? INHIBIT_ABORT : 0;
3380         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3381
3382         /* Announce entry to new IO submit field. */
3383         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3384                         "6162 ABORT Request to rport DID x%06x "
3385                         "for xri x%x x%x\n",
3386                         ctxp->sid, ctxp->oxid, ctxp->wqeq->sli4_xritag);
3387
3388         /* If the hba is getting reset, this flag is set.  It is
3389          * cleared when the reset is complete and rings reestablished.
3390          */
3391         spin_lock_irqsave(&phba->hbalock, flags);
3392         /* driver queued commands are in process of being flushed */
3393         if (phba->hba_flag & HBA_IOQ_FLUSH) {
3394                 spin_unlock_irqrestore(&phba->hbalock, flags);
3395                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3396                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3397                                 "6163 Driver in reset cleanup - flushing "
3398                                 "NVME Req now. hba_flag x%x oxid x%x\n",
3399                                 phba->hba_flag, ctxp->oxid);
3400                 lpfc_sli_release_iocbq(phba, abts_wqeq);
3401                 spin_lock_irqsave(&ctxp->ctxlock, flags);
3402                 ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3403                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3404                 return 0;
3405         }
3406
3407         /* Outstanding abort is in progress */
3408         if (abts_wqeq->iocb_flag & LPFC_DRIVER_ABORTED) {
3409                 spin_unlock_irqrestore(&phba->hbalock, flags);
3410                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3411                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3412                                 "6164 Outstanding NVME I/O Abort Request "
3413                                 "still pending on oxid x%x\n",
3414                                 ctxp->oxid);
3415                 lpfc_sli_release_iocbq(phba, abts_wqeq);
3416                 spin_lock_irqsave(&ctxp->ctxlock, flags);
3417                 ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3418                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3419                 return 0;
3420         }
3421
3422         /* Ready - mark outstanding as aborted by driver. */
3423         abts_wqeq->iocb_flag |= LPFC_DRIVER_ABORTED;
3424
3425         lpfc_nvme_prep_abort_wqe(abts_wqeq, ctxp->wqeq->sli4_xritag, opt);
3426
3427         /* ABTS WQE must go to the same WQ as the WQE to be aborted */
3428         abts_wqeq->hba_wqidx = ctxp->wqeq->hba_wqidx;
3429         abts_wqeq->wqe_cmpl = lpfc_nvmet_sol_fcp_abort_cmp;
3430         abts_wqeq->iocb_cmpl = NULL;
3431         abts_wqeq->iocb_flag |= LPFC_IO_NVME;
3432         abts_wqeq->context2 = ctxp;
3433         abts_wqeq->vport = phba->pport;
3434         if (!ctxp->hdwq)
3435                 ctxp->hdwq = &phba->sli4_hba.hdwq[abts_wqeq->hba_wqidx];
3436
3437         rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, abts_wqeq);
3438         spin_unlock_irqrestore(&phba->hbalock, flags);
3439         if (rc == WQE_SUCCESS) {
3440                 atomic_inc(&tgtp->xmt_abort_sol);
3441                 return 0;
3442         }
3443
3444         atomic_inc(&tgtp->xmt_abort_rsp_error);
3445         spin_lock_irqsave(&ctxp->ctxlock, flags);
3446         ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3447         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3448         lpfc_sli_release_iocbq(phba, abts_wqeq);
3449         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3450                         "6166 Failed ABORT issue_wqe with status x%x "
3451                         "for oxid x%x.\n",
3452                         rc, ctxp->oxid);
3453         return 1;
3454 }
3455
3456 static int
3457 lpfc_nvmet_unsol_fcp_issue_abort(struct lpfc_hba *phba,
3458                                  struct lpfc_async_xchg_ctx *ctxp,
3459                                  uint32_t sid, uint16_t xri)
3460 {
3461         struct lpfc_nvmet_tgtport *tgtp;
3462         struct lpfc_iocbq *abts_wqeq;
3463         unsigned long flags;
3464         bool released = false;
3465         int rc;
3466
3467         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3468         if (!ctxp->wqeq) {
3469                 ctxp->wqeq = ctxp->ctxbuf->iocbq;
3470                 ctxp->wqeq->hba_wqidx = 0;
3471         }
3472
3473         if (ctxp->state == LPFC_NVME_STE_FREE) {
3474                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3475                                 "6417 NVMET ABORT ctx freed %d %d oxid x%x\n",
3476                                 ctxp->state, ctxp->entry_cnt, ctxp->oxid);
3477                 rc = WQE_BUSY;
3478                 goto aerr;
3479         }
3480         ctxp->state = LPFC_NVME_STE_ABORT;
3481         ctxp->entry_cnt++;
3482         rc = lpfc_nvmet_unsol_issue_abort(phba, ctxp, sid, xri);
3483         if (rc == 0)
3484                 goto aerr;
3485
3486         spin_lock_irqsave(&phba->hbalock, flags);
3487         abts_wqeq = ctxp->wqeq;
3488         abts_wqeq->wqe_cmpl = lpfc_nvmet_unsol_fcp_abort_cmp;
3489         abts_wqeq->iocb_cmpl = NULL;
3490         abts_wqeq->iocb_flag |= LPFC_IO_NVMET;
3491         if (!ctxp->hdwq)
3492                 ctxp->hdwq = &phba->sli4_hba.hdwq[abts_wqeq->hba_wqidx];
3493
3494         rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, abts_wqeq);
3495         spin_unlock_irqrestore(&phba->hbalock, flags);
3496         if (rc == WQE_SUCCESS) {
3497                 return 0;
3498         }
3499
3500 aerr:
3501         spin_lock_irqsave(&ctxp->ctxlock, flags);
3502         if (ctxp->flag & LPFC_NVME_CTX_RLS) {
3503                 spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3504                 list_del_init(&ctxp->list);
3505                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3506                 released = true;
3507         }
3508         ctxp->flag &= ~(LPFC_NVME_ABORT_OP | LPFC_NVME_CTX_RLS);
3509         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3510
3511         atomic_inc(&tgtp->xmt_abort_rsp_error);
3512         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3513                         "6135 Failed to Issue ABTS for oxid x%x. Status x%x "
3514                         "(%x)\n",
3515                         ctxp->oxid, rc, released);
3516         if (released)
3517                 lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
3518         return 1;
3519 }
3520
3521 /**
3522  * lpfc_nvme_unsol_ls_issue_abort - issue ABTS on an exchange received
3523  *        via async frame receive where the frame is not handled.
3524  * @phba: pointer to adapter structure
3525  * @ctxp: pointer to the asynchronously received received sequence
3526  * @sid: address of the remote port to send the ABTS to
3527  * @xri: oxid value to for the ABTS (other side's exchange id).
3528  **/
3529 int
3530 lpfc_nvme_unsol_ls_issue_abort(struct lpfc_hba *phba,
3531                                 struct lpfc_async_xchg_ctx *ctxp,
3532                                 uint32_t sid, uint16_t xri)
3533 {
3534         struct lpfc_nvmet_tgtport *tgtp = NULL;
3535         struct lpfc_iocbq *abts_wqeq;
3536         unsigned long flags;
3537         int rc;
3538
3539         if ((ctxp->state == LPFC_NVME_STE_LS_RCV && ctxp->entry_cnt == 1) ||
3540             (ctxp->state == LPFC_NVME_STE_LS_RSP && ctxp->entry_cnt == 2)) {
3541                 ctxp->state = LPFC_NVME_STE_LS_ABORT;
3542                 ctxp->entry_cnt++;
3543         } else {
3544                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3545                                 "6418 NVMET LS abort state mismatch "
3546                                 "IO x%x: %d %d\n",
3547                                 ctxp->oxid, ctxp->state, ctxp->entry_cnt);
3548                 ctxp->state = LPFC_NVME_STE_LS_ABORT;
3549         }
3550
3551         if (phba->nvmet_support && phba->targetport)
3552                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3553
3554         if (!ctxp->wqeq) {
3555                 /* Issue ABTS for this WQE based on iotag */
3556                 ctxp->wqeq = lpfc_sli_get_iocbq(phba);
3557                 if (!ctxp->wqeq) {
3558                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3559                                         "6068 Abort failed: No wqeqs: "
3560                                         "xri: x%x\n", xri);
3561                         /* No failure to an ABTS request. */
3562                         kfree(ctxp);
3563                         return 0;
3564                 }
3565         }
3566         abts_wqeq = ctxp->wqeq;
3567
3568         if (lpfc_nvmet_unsol_issue_abort(phba, ctxp, sid, xri) == 0) {
3569                 rc = WQE_BUSY;
3570                 goto out;
3571         }
3572
3573         spin_lock_irqsave(&phba->hbalock, flags);
3574         abts_wqeq->wqe_cmpl = lpfc_nvmet_xmt_ls_abort_cmp;
3575         abts_wqeq->iocb_cmpl = NULL;
3576         abts_wqeq->iocb_flag |=  LPFC_IO_NVME_LS;
3577         rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, abts_wqeq);
3578         spin_unlock_irqrestore(&phba->hbalock, flags);
3579         if (rc == WQE_SUCCESS) {
3580                 if (tgtp)
3581                         atomic_inc(&tgtp->xmt_abort_unsol);
3582                 return 0;
3583         }
3584 out:
3585         if (tgtp)
3586                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3587         abts_wqeq->context2 = NULL;
3588         abts_wqeq->context3 = NULL;
3589         lpfc_sli_release_iocbq(phba, abts_wqeq);
3590         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3591                         "6056 Failed to Issue ABTS. Status x%x\n", rc);
3592         return 1;
3593 }
3594
3595 /**
3596  * lpfc_nvmet_invalidate_host
3597  *
3598  * @phba - pointer to the driver instance bound to an adapter port.
3599  * @ndlp - pointer to an lpfc_nodelist type
3600  *
3601  * This routine upcalls the nvmet transport to invalidate an NVME
3602  * host to which this target instance had active connections.
3603  */
3604 void
3605 lpfc_nvmet_invalidate_host(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
3606 {
3607         struct lpfc_nvmet_tgtport *tgtp;
3608
3609         lpfc_printf_log(phba, KERN_INFO, LOG_NVME | LOG_NVME_ABTS,
3610                         "6203 Invalidating hosthandle x%px\n",
3611                         ndlp);
3612
3613         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3614         atomic_set(&tgtp->state, LPFC_NVMET_INV_HOST_ACTIVE);
3615
3616 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
3617         /* Need to get the nvmet_fc_target_port pointer here.*/
3618         nvmet_fc_invalidate_host(phba->targetport, ndlp);
3619 #endif
3620 }