drivers/scsi/lpfc/lpfc_nvmet.c

   1 /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Fibre Channel Host Bus Adapters.                                *
   4  * Copyright (C) 2017-2021 Broadcom. All Rights Reserved. The term *
   5  * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.     *
   6  * Copyright (C) 2004-2016 Emulex.  All rights reserved.           *
   7  * EMULEX and SLI are trademarks of Emulex.                        *
   8  * www.broadcom.com                                                *
   9  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
  10  *                                                                 *
  11  * This program is free software; you can redistribute it and/or   *
  12  * modify it under the terms of version 2 of the GNU General       *
  13  * Public License as published by the Free Software Foundation.    *
  14  * This program is distributed in the hope that it will be useful. *
  15  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  16  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  17  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  18  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  19  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  20  * more details, a copy of which can be found in the file COPYING  *
  21  * included with this package.                                     *
  22  ********************************************************************/
  23 #include <linux/pci.h>
  24 #include <linux/slab.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/delay.h>
  27 #include <asm/unaligned.h>
  28 #include <linux/crc-t10dif.h>
  29 #include <net/checksum.h>
  30
  31 #include <scsi/scsi.h>
  32 #include <scsi/scsi_device.h>
  33 #include <scsi/scsi_eh.h>
  34 #include <scsi/scsi_host.h>
  35 #include <scsi/scsi_tcq.h>
  36 #include <scsi/scsi_transport_fc.h>
  37 #include <scsi/fc/fc_fs.h>
  38
  39 #include "lpfc_version.h"
  40 #include "lpfc_hw4.h"
  41 #include "lpfc_hw.h"
  42 #include "lpfc_sli.h"
  43 #include "lpfc_sli4.h"
  44 #include "lpfc_nl.h"
  45 #include "lpfc_disc.h"
  46 #include "lpfc.h"
  47 #include "lpfc_scsi.h"
  48 #include "lpfc_nvme.h"
  49 #include "lpfc_logmsg.h"
  50 #include "lpfc_crtn.h"
  51 #include "lpfc_vport.h"
  52 #include "lpfc_debugfs.h"
  53
  54 static struct lpfc_iocbq *lpfc_nvmet_prep_ls_wqe(struct lpfc_hba *,
  55                                                  struct lpfc_async_xchg_ctx *,
  56                                                  dma_addr_t rspbuf,
  57                                                  uint16_t rspsize);
  58 static struct lpfc_iocbq *lpfc_nvmet_prep_fcp_wqe(struct lpfc_hba *,
  59                                                   struct lpfc_async_xchg_ctx *);
  60 static int lpfc_nvmet_sol_fcp_issue_abort(struct lpfc_hba *,
  61                                           struct lpfc_async_xchg_ctx *,
  62                                           uint32_t, uint16_t);
  63 static int lpfc_nvmet_unsol_fcp_issue_abort(struct lpfc_hba *,
  64                                             struct lpfc_async_xchg_ctx *,
  65                                             uint32_t, uint16_t);
  66 static void lpfc_nvmet_wqfull_flush(struct lpfc_hba *, struct lpfc_queue *,
  67                                     struct lpfc_async_xchg_ctx *);
  68 static void lpfc_nvmet_fcp_rqst_defer_work(struct work_struct *);
  69
  70 static void lpfc_nvmet_process_rcv_fcp_req(struct lpfc_nvmet_ctxbuf *ctx_buf);
  71
  72 static union lpfc_wqe128 lpfc_tsend_cmd_template;
  73 static union lpfc_wqe128 lpfc_treceive_cmd_template;
  74 static union lpfc_wqe128 lpfc_trsp_cmd_template;
  75
  76 /* Setup WQE templates for NVME IOs */
  77 void
  78 lpfc_nvmet_cmd_template(void)
  79 {
  80         union lpfc_wqe128 *wqe;
  81
  82         /* TSEND template */
  83         wqe = &lpfc_tsend_cmd_template;
  84         memset(wqe, 0, sizeof(union lpfc_wqe128));
  85
  86         /* Word 0, 1, 2 - BDE is variable */
  87
  88         /* Word 3 - payload_offset_len is zero */
  89
  90         /* Word 4 - relative_offset is variable */
  91
  92         /* Word 5 - is zero */
  93
  94         /* Word 6 - ctxt_tag, xri_tag is variable */
  95
  96         /* Word 7 - wqe_ar is variable */
  97         bf_set(wqe_cmnd, &wqe->fcp_tsend.wqe_com, CMD_FCP_TSEND64_WQE);
  98         bf_set(wqe_pu, &wqe->fcp_tsend.wqe_com, PARM_REL_OFF);
  99         bf_set(wqe_class, &wqe->fcp_tsend.wqe_com, CLASS3);
 100         bf_set(wqe_ct, &wqe->fcp_tsend.wqe_com, SLI4_CT_RPI);
 101         bf_set(wqe_ar, &wqe->fcp_tsend.wqe_com, 1);
 102
 103         /* Word 8 - abort_tag is variable */
 104
 105         /* Word 9  - reqtag, rcvoxid is variable */
 106
 107         /* Word 10 - wqes, xc is variable */
 108         bf_set(wqe_xchg, &wqe->fcp_tsend.wqe_com, LPFC_NVME_XCHG);
 109         bf_set(wqe_dbde, &wqe->fcp_tsend.wqe_com, 1);
 110         bf_set(wqe_wqes, &wqe->fcp_tsend.wqe_com, 0);
 111         bf_set(wqe_xc, &wqe->fcp_tsend.wqe_com, 1);
 112         bf_set(wqe_iod, &wqe->fcp_tsend.wqe_com, LPFC_WQE_IOD_WRITE);
 113         bf_set(wqe_lenloc, &wqe->fcp_tsend.wqe_com, LPFC_WQE_LENLOC_WORD12);
 114
 115         /* Word 11 - sup, irsp, irsplen is variable */
 116         bf_set(wqe_cmd_type, &wqe->fcp_tsend.wqe_com, FCP_COMMAND_TSEND);
 117         bf_set(wqe_cqid, &wqe->fcp_tsend.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
 118         bf_set(wqe_sup, &wqe->fcp_tsend.wqe_com, 0);
 119         bf_set(wqe_irsp, &wqe->fcp_tsend.wqe_com, 0);
 120         bf_set(wqe_irsplen, &wqe->fcp_tsend.wqe_com, 0);
 121         bf_set(wqe_pbde, &wqe->fcp_tsend.wqe_com, 0);
 122
 123         /* Word 12 - fcp_data_len is variable */
 124
 125         /* Word 13, 14, 15 - PBDE is zero */
 126
 127         /* TRECEIVE template */
 128         wqe = &lpfc_treceive_cmd_template;
 129         memset(wqe, 0, sizeof(union lpfc_wqe128));
 130
 131         /* Word 0, 1, 2 - BDE is variable */
 132
 133         /* Word 3 */
 134         wqe->fcp_treceive.payload_offset_len = TXRDY_PAYLOAD_LEN;
 135
 136         /* Word 4 - relative_offset is variable */
 137
 138         /* Word 5 - is zero */
 139
 140         /* Word 6 - ctxt_tag, xri_tag is variable */
 141
 142         /* Word 7 */
 143         bf_set(wqe_cmnd, &wqe->fcp_treceive.wqe_com, CMD_FCP_TRECEIVE64_WQE);
 144         bf_set(wqe_pu, &wqe->fcp_treceive.wqe_com, PARM_REL_OFF);
 145         bf_set(wqe_class, &wqe->fcp_treceive.wqe_com, CLASS3);
 146         bf_set(wqe_ct, &wqe->fcp_treceive.wqe_com, SLI4_CT_RPI);
 147         bf_set(wqe_ar, &wqe->fcp_treceive.wqe_com, 0);
 148
 149         /* Word 8 - abort_tag is variable */
 150
 151         /* Word 9  - reqtag, rcvoxid is variable */
 152
 153         /* Word 10 - xc is variable */
 154         bf_set(wqe_dbde, &wqe->fcp_treceive.wqe_com, 1);
 155         bf_set(wqe_wqes, &wqe->fcp_treceive.wqe_com, 0);
 156         bf_set(wqe_xchg, &wqe->fcp_treceive.wqe_com, LPFC_NVME_XCHG);
 157         bf_set(wqe_iod, &wqe->fcp_treceive.wqe_com, LPFC_WQE_IOD_READ);
 158         bf_set(wqe_lenloc, &wqe->fcp_treceive.wqe_com, LPFC_WQE_LENLOC_WORD12);
 159         bf_set(wqe_xc, &wqe->fcp_tsend.wqe_com, 1);
 160
 161         /* Word 11 - pbde is variable */
 162         bf_set(wqe_cmd_type, &wqe->fcp_treceive.wqe_com, FCP_COMMAND_TRECEIVE);
 163         bf_set(wqe_cqid, &wqe->fcp_treceive.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
 164         bf_set(wqe_sup, &wqe->fcp_treceive.wqe_com, 0);
 165         bf_set(wqe_irsp, &wqe->fcp_treceive.wqe_com, 0);
 166         bf_set(wqe_irsplen, &wqe->fcp_treceive.wqe_com, 0);
 167         bf_set(wqe_pbde, &wqe->fcp_treceive.wqe_com, 1);
 168
 169         /* Word 12 - fcp_data_len is variable */
 170
 171         /* Word 13, 14, 15 - PBDE is variable */
 172
 173         /* TRSP template */
 174         wqe = &lpfc_trsp_cmd_template;
 175         memset(wqe, 0, sizeof(union lpfc_wqe128));
 176
 177         /* Word 0, 1, 2 - BDE is variable */
 178
 179         /* Word 3 - response_len is variable */
 180
 181         /* Word 4, 5 - is zero */
 182
 183         /* Word 6 - ctxt_tag, xri_tag is variable */
 184
 185         /* Word 7 */
 186         bf_set(wqe_cmnd, &wqe->fcp_trsp.wqe_com, CMD_FCP_TRSP64_WQE);
 187         bf_set(wqe_pu, &wqe->fcp_trsp.wqe_com, PARM_UNUSED);
 188         bf_set(wqe_class, &wqe->fcp_trsp.wqe_com, CLASS3);
 189         bf_set(wqe_ct, &wqe->fcp_trsp.wqe_com, SLI4_CT_RPI);
 190         bf_set(wqe_ag, &wqe->fcp_trsp.wqe_com, 1); /* wqe_ar */
 191
 192         /* Word 8 - abort_tag is variable */
 193
 194         /* Word 9  - reqtag is variable */
 195
 196         /* Word 10 wqes, xc is variable */
 197         bf_set(wqe_dbde, &wqe->fcp_trsp.wqe_com, 1);
 198         bf_set(wqe_xchg, &wqe->fcp_trsp.wqe_com, LPFC_NVME_XCHG);
 199         bf_set(wqe_wqes, &wqe->fcp_trsp.wqe_com, 0);
 200         bf_set(wqe_xc, &wqe->fcp_trsp.wqe_com, 0);
 201         bf_set(wqe_iod, &wqe->fcp_trsp.wqe_com, LPFC_WQE_IOD_NONE);
 202         bf_set(wqe_lenloc, &wqe->fcp_trsp.wqe_com, LPFC_WQE_LENLOC_WORD3);
 203
 204         /* Word 11 irsp, irsplen is variable */
 205         bf_set(wqe_cmd_type, &wqe->fcp_trsp.wqe_com, FCP_COMMAND_TRSP);
 206         bf_set(wqe_cqid, &wqe->fcp_trsp.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
 207         bf_set(wqe_sup, &wqe->fcp_trsp.wqe_com, 0);
 208         bf_set(wqe_irsp, &wqe->fcp_trsp.wqe_com, 0);
 209         bf_set(wqe_irsplen, &wqe->fcp_trsp.wqe_com, 0);
 210         bf_set(wqe_pbde, &wqe->fcp_trsp.wqe_com, 0);
 211
 212         /* Word 12, 13, 14, 15 - is zero */
 213 }
 214
 215 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
 216 static struct lpfc_async_xchg_ctx *
 217 lpfc_nvmet_get_ctx_for_xri(struct lpfc_hba *phba, u16 xri)
 218 {
 219         struct lpfc_async_xchg_ctx *ctxp;
 220         unsigned long iflag;
 221         bool found = false;
 222
 223         spin_lock_irqsave(&phba->sli4_hba.t_active_list_lock, iflag);
 224         list_for_each_entry(ctxp, &phba->sli4_hba.t_active_ctx_list, list) {
 225                 if (ctxp->ctxbuf->sglq->sli4_xritag != xri)
 226                         continue;
 227
 228                 found = true;
 229                 break;
 230         }
 231         spin_unlock_irqrestore(&phba->sli4_hba.t_active_list_lock, iflag);
 232         if (found)
 233                 return ctxp;
 234
 235         return NULL;
 236 }
 237
 238 static struct lpfc_async_xchg_ctx *
 239 lpfc_nvmet_get_ctx_for_oxid(struct lpfc_hba *phba, u16 oxid, u32 sid)
 240 {
 241         struct lpfc_async_xchg_ctx *ctxp;
 242         unsigned long iflag;
 243         bool found = false;
 244
 245         spin_lock_irqsave(&phba->sli4_hba.t_active_list_lock, iflag);
 246         list_for_each_entry(ctxp, &phba->sli4_hba.t_active_ctx_list, list) {
 247                 if (ctxp->oxid != oxid || ctxp->sid != sid)
 248                         continue;
 249
 250                 found = true;
 251                 break;
 252         }
 253         spin_unlock_irqrestore(&phba->sli4_hba.t_active_list_lock, iflag);
 254         if (found)
 255                 return ctxp;
 256
 257         return NULL;
 258 }
 259 #endif
 260
 261 static void
 262 lpfc_nvmet_defer_release(struct lpfc_hba *phba,
 263                         struct lpfc_async_xchg_ctx *ctxp)
 264 {
 265         lockdep_assert_held(&ctxp->ctxlock);
 266
 267         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
 268                         "6313 NVMET Defer ctx release oxid x%x flg x%x\n",
 269                         ctxp->oxid, ctxp->flag);
 270
 271         if (ctxp->flag & LPFC_NVME_CTX_RLS)
 272                 return;
 273
 274         ctxp->flag |= LPFC_NVME_CTX_RLS;
 275         spin_lock(&phba->sli4_hba.t_active_list_lock);
 276         list_del(&ctxp->list);
 277         spin_unlock(&phba->sli4_hba.t_active_list_lock);
 278         spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
 279         list_add_tail(&ctxp->list, &phba->sli4_hba.lpfc_abts_nvmet_ctx_list);
 280         spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
 281 }
 282
 283 /**
 284  * __lpfc_nvme_xmt_ls_rsp_cmp - Generic completion handler for the
 285  *         transmission of an NVME LS response.
 286  * @phba: Pointer to HBA context object.
 287  * @cmdwqe: Pointer to driver command WQE object.
 288  * @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  * @ctx_buf: ctx buffer context
 375  *
 376  * Description: Frees the given DMA buffer in the appropriate way given by
 377  * reposting it to its associated RQ so it can be reused.
 378  *
 379  * Notes: Takes phba->hbalock.  Can be called with or without other locks held.
 380  *
 381  * Returns: None
 382  **/
 383 void
 384 lpfc_nvmet_ctxbuf_post(struct lpfc_hba *phba, struct lpfc_nvmet_ctxbuf *ctx_buf)
 385 {
 386 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
 387         struct lpfc_async_xchg_ctx *ctxp = ctx_buf->context;
 388         struct lpfc_nvmet_tgtport *tgtp;
 389         struct fc_frame_header *fc_hdr;
 390         struct rqb_dmabuf *nvmebuf;
 391         struct lpfc_nvmet_ctx_info *infop;
 392         uint32_t size, oxid, sid;
 393         int cpu;
 394         unsigned long iflag;
 395
 396         if (ctxp->state == LPFC_NVME_STE_FREE) {
 397                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 398                                 "6411 NVMET free, already free IO x%x: %d %d\n",
 399                                 ctxp->oxid, ctxp->state, ctxp->entry_cnt);
 400         }
 401
 402         if (ctxp->rqb_buffer) {
 403                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
 404                 nvmebuf = ctxp->rqb_buffer;
 405                 /* check if freed in another path whilst acquiring lock */
 406                 if (nvmebuf) {
 407                         ctxp->rqb_buffer = NULL;
 408                         if (ctxp->flag & LPFC_NVME_CTX_REUSE_WQ) {
 409                                 ctxp->flag &= ~LPFC_NVME_CTX_REUSE_WQ;
 410                                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
 411                                 nvmebuf->hrq->rqbp->rqb_free_buffer(phba,
 412                                                                     nvmebuf);
 413                         } else {
 414                                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
 415                                 /* repost */
 416                                 lpfc_rq_buf_free(phba, &nvmebuf->hbuf);
 417                         }
 418                 } else {
 419                         spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
 420                 }
 421         }
 422         ctxp->state = LPFC_NVME_STE_FREE;
 423
 424         spin_lock_irqsave(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
 425         if (phba->sli4_hba.nvmet_io_wait_cnt) {
 426                 list_remove_head(&phba->sli4_hba.lpfc_nvmet_io_wait_list,
 427                                  nvmebuf, struct rqb_dmabuf,
 428                                  hbuf.list);
 429                 phba->sli4_hba.nvmet_io_wait_cnt--;
 430                 spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock,
 431                                        iflag);
 432
 433                 fc_hdr = (struct fc_frame_header *)(nvmebuf->hbuf.virt);
 434                 oxid = be16_to_cpu(fc_hdr->fh_ox_id);
 435                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
 436                 size = nvmebuf->bytes_recv;
 437                 sid = sli4_sid_from_fc_hdr(fc_hdr);
 438
 439                 ctxp = (struct lpfc_async_xchg_ctx *)ctx_buf->context;
 440                 ctxp->wqeq = NULL;
 441                 ctxp->offset = 0;
 442                 ctxp->phba = phba;
 443                 ctxp->size = size;
 444                 ctxp->oxid = oxid;
 445                 ctxp->sid = sid;
 446                 ctxp->state = LPFC_NVME_STE_RCV;
 447                 ctxp->entry_cnt = 1;
 448                 ctxp->flag = 0;
 449                 ctxp->ctxbuf = ctx_buf;
 450                 ctxp->rqb_buffer = (void *)nvmebuf;
 451                 spin_lock_init(&ctxp->ctxlock);
 452
 453 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 454                 /* NOTE: isr time stamp is stale when context is re-assigned*/
 455                 if (ctxp->ts_isr_cmd) {
 456                         ctxp->ts_cmd_nvme = 0;
 457                         ctxp->ts_nvme_data = 0;
 458                         ctxp->ts_data_wqput = 0;
 459                         ctxp->ts_isr_data = 0;
 460                         ctxp->ts_data_nvme = 0;
 461                         ctxp->ts_nvme_status = 0;
 462                         ctxp->ts_status_wqput = 0;
 463                         ctxp->ts_isr_status = 0;
 464                         ctxp->ts_status_nvme = 0;
 465                 }
 466 #endif
 467                 atomic_inc(&tgtp->rcv_fcp_cmd_in);
 468
 469                 /* Indicate that a replacement buffer has been posted */
 470                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
 471                 ctxp->flag |= LPFC_NVME_CTX_REUSE_WQ;
 472                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
 473
 474                 if (!queue_work(phba->wq, &ctx_buf->defer_work)) {
 475                         atomic_inc(&tgtp->rcv_fcp_cmd_drop);
 476                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 477                                         "6181 Unable to queue deferred work "
 478                                         "for oxid x%x. "
 479                                         "FCP Drop IO [x%x x%x x%x]\n",
 480                                         ctxp->oxid,
 481                                         atomic_read(&tgtp->rcv_fcp_cmd_in),
 482                                         atomic_read(&tgtp->rcv_fcp_cmd_out),
 483                                         atomic_read(&tgtp->xmt_fcp_release));
 484
 485                         spin_lock_irqsave(&ctxp->ctxlock, iflag);
 486                         lpfc_nvmet_defer_release(phba, ctxp);
 487                         spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
 488                         lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, sid, oxid);
 489                 }
 490                 return;
 491         }
 492         spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
 493
 494         /*
 495          * Use the CPU context list, from the MRQ the IO was received on
 496          * (ctxp->idx), to save context structure.
 497          */
 498         spin_lock_irqsave(&phba->sli4_hba.t_active_list_lock, iflag);
 499         list_del_init(&ctxp->list);
 500         spin_unlock_irqrestore(&phba->sli4_hba.t_active_list_lock, iflag);
 501         cpu = raw_smp_processor_id();
 502         infop = lpfc_get_ctx_list(phba, cpu, ctxp->idx);
 503         spin_lock_irqsave(&infop->nvmet_ctx_list_lock, iflag);
 504         list_add_tail(&ctx_buf->list, &infop->nvmet_ctx_list);
 505         infop->nvmet_ctx_list_cnt++;
 506         spin_unlock_irqrestore(&infop->nvmet_ctx_list_lock, iflag);
 507 #endif
 508 }
 509
 510 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 511 static void
 512 lpfc_nvmet_ktime(struct lpfc_hba *phba,
 513                  struct lpfc_async_xchg_ctx *ctxp)
 514 {
 515         uint64_t seg1, seg2, seg3, seg4, seg5;
 516         uint64_t seg6, seg7, seg8, seg9, seg10;
 517         uint64_t segsum;
 518
 519         if (!ctxp->ts_isr_cmd || !ctxp->ts_cmd_nvme ||
 520             !ctxp->ts_nvme_data || !ctxp->ts_data_wqput ||
 521             !ctxp->ts_isr_data || !ctxp->ts_data_nvme ||
 522             !ctxp->ts_nvme_status || !ctxp->ts_status_wqput ||
 523             !ctxp->ts_isr_status || !ctxp->ts_status_nvme)
 524                 return;
 525
 526         if (ctxp->ts_status_nvme < ctxp->ts_isr_cmd)
 527                 return;
 528         if (ctxp->ts_isr_cmd  > ctxp->ts_cmd_nvme)
 529                 return;
 530         if (ctxp->ts_cmd_nvme > ctxp->ts_nvme_data)
 531                 return;
 532         if (ctxp->ts_nvme_data > ctxp->ts_data_wqput)
 533                 return;
 534         if (ctxp->ts_data_wqput > ctxp->ts_isr_data)
 535                 return;
 536         if (ctxp->ts_isr_data > ctxp->ts_data_nvme)
 537                 return;
 538         if (ctxp->ts_data_nvme > ctxp->ts_nvme_status)
 539                 return;
 540         if (ctxp->ts_nvme_status > ctxp->ts_status_wqput)
 541                 return;
 542         if (ctxp->ts_status_wqput > ctxp->ts_isr_status)
 543                 return;
 544         if (ctxp->ts_isr_status > ctxp->ts_status_nvme)
 545                 return;
 546         /*
 547          * Segment 1 - Time from FCP command received by MSI-X ISR
 548          * to FCP command is passed to NVME Layer.
 549          * Segment 2 - Time from FCP command payload handed
 550          * off to NVME Layer to Driver receives a Command op
 551          * from NVME Layer.
 552          * Segment 3 - Time from Driver receives a Command op
 553          * from NVME Layer to Command is put on WQ.
 554          * Segment 4 - Time from Driver WQ put is done
 555          * to MSI-X ISR for Command cmpl.
 556          * Segment 5 - Time from MSI-X ISR for Command cmpl to
 557          * Command cmpl is passed to NVME Layer.
 558          * Segment 6 - Time from Command cmpl is passed to NVME
 559          * Layer to Driver receives a RSP op from NVME Layer.
 560          * Segment 7 - Time from Driver receives a RSP op from
 561          * NVME Layer to WQ put is done on TRSP FCP Status.
 562          * Segment 8 - Time from Driver WQ put is done on TRSP
 563          * FCP Status to MSI-X ISR for TRSP cmpl.
 564          * Segment 9 - Time from MSI-X ISR for TRSP cmpl to
 565          * TRSP cmpl is passed to NVME Layer.
 566          * Segment 10 - Time from FCP command received by
 567          * MSI-X ISR to command is completed on wire.
 568          * (Segments 1 thru 8) for READDATA / WRITEDATA
 569          * (Segments 1 thru 4) for READDATA_RSP
 570          */
 571         seg1 = ctxp->ts_cmd_nvme - ctxp->ts_isr_cmd;
 572         segsum = seg1;
 573
 574         seg2 = ctxp->ts_nvme_data - ctxp->ts_isr_cmd;
 575         if (segsum > seg2)
 576                 return;
 577         seg2 -= segsum;
 578         segsum += seg2;
 579
 580         seg3 = ctxp->ts_data_wqput - ctxp->ts_isr_cmd;
 581         if (segsum > seg3)
 582                 return;
 583         seg3 -= segsum;
 584         segsum += seg3;
 585
 586         seg4 = ctxp->ts_isr_data - ctxp->ts_isr_cmd;
 587         if (segsum > seg4)
 588                 return;
 589         seg4 -= segsum;
 590         segsum += seg4;
 591
 592         seg5 = ctxp->ts_data_nvme - ctxp->ts_isr_cmd;
 593         if (segsum > seg5)
 594                 return;
 595         seg5 -= segsum;
 596         segsum += seg5;
 597
 598
 599         /* For auto rsp commands seg6 thru seg10 will be 0 */
 600         if (ctxp->ts_nvme_status > ctxp->ts_data_nvme) {
 601                 seg6 = ctxp->ts_nvme_status - ctxp->ts_isr_cmd;
 602                 if (segsum > seg6)
 603                         return;
 604                 seg6 -= segsum;
 605                 segsum += seg6;
 606
 607                 seg7 = ctxp->ts_status_wqput - ctxp->ts_isr_cmd;
 608                 if (segsum > seg7)
 609                         return;
 610                 seg7 -= segsum;
 611                 segsum += seg7;
 612
 613                 seg8 = ctxp->ts_isr_status - ctxp->ts_isr_cmd;
 614                 if (segsum > seg8)
 615                         return;
 616                 seg8 -= segsum;
 617                 segsum += seg8;
 618
 619                 seg9 = ctxp->ts_status_nvme - ctxp->ts_isr_cmd;
 620                 if (segsum > seg9)
 621                         return;
 622                 seg9 -= segsum;
 623                 segsum += seg9;
 624
 625                 if (ctxp->ts_isr_status < ctxp->ts_isr_cmd)
 626                         return;
 627                 seg10 = (ctxp->ts_isr_status -
 628                         ctxp->ts_isr_cmd);
 629         } else {
 630                 if (ctxp->ts_isr_data < ctxp->ts_isr_cmd)
 631                         return;
 632                 seg6 =  0;
 633                 seg7 =  0;
 634                 seg8 =  0;
 635                 seg9 =  0;
 636                 seg10 = (ctxp->ts_isr_data - ctxp->ts_isr_cmd);
 637         }
 638
 639         phba->ktime_seg1_total += seg1;
 640         if (seg1 < phba->ktime_seg1_min)
 641                 phba->ktime_seg1_min = seg1;
 642         else if (seg1 > phba->ktime_seg1_max)
 643                 phba->ktime_seg1_max = seg1;
 644
 645         phba->ktime_seg2_total += seg2;
 646         if (seg2 < phba->ktime_seg2_min)
 647                 phba->ktime_seg2_min = seg2;
 648         else if (seg2 > phba->ktime_seg2_max)
 649                 phba->ktime_seg2_max = seg2;
 650
 651         phba->ktime_seg3_total += seg3;
 652         if (seg3 < phba->ktime_seg3_min)
 653                 phba->ktime_seg3_min = seg3;
 654         else if (seg3 > phba->ktime_seg3_max)
 655                 phba->ktime_seg3_max = seg3;
 656
 657         phba->ktime_seg4_total += seg4;
 658         if (seg4 < phba->ktime_seg4_min)
 659                 phba->ktime_seg4_min = seg4;
 660         else if (seg4 > phba->ktime_seg4_max)
 661                 phba->ktime_seg4_max = seg4;
 662
 663         phba->ktime_seg5_total += seg5;
 664         if (seg5 < phba->ktime_seg5_min)
 665                 phba->ktime_seg5_min = seg5;
 666         else if (seg5 > phba->ktime_seg5_max)
 667                 phba->ktime_seg5_max = seg5;
 668
 669         phba->ktime_data_samples++;
 670         if (!seg6)
 671                 goto out;
 672
 673         phba->ktime_seg6_total += seg6;
 674         if (seg6 < phba->ktime_seg6_min)
 675                 phba->ktime_seg6_min = seg6;
 676         else if (seg6 > phba->ktime_seg6_max)
 677                 phba->ktime_seg6_max = seg6;
 678
 679         phba->ktime_seg7_total += seg7;
 680         if (seg7 < phba->ktime_seg7_min)
 681                 phba->ktime_seg7_min = seg7;
 682         else if (seg7 > phba->ktime_seg7_max)
 683                 phba->ktime_seg7_max = seg7;
 684
 685         phba->ktime_seg8_total += seg8;
 686         if (seg8 < phba->ktime_seg8_min)
 687                 phba->ktime_seg8_min = seg8;
 688         else if (seg8 > phba->ktime_seg8_max)
 689                 phba->ktime_seg8_max = seg8;
 690
 691         phba->ktime_seg9_total += seg9;
 692         if (seg9 < phba->ktime_seg9_min)
 693                 phba->ktime_seg9_min = seg9;
 694         else if (seg9 > phba->ktime_seg9_max)
 695                 phba->ktime_seg9_max = seg9;
 696 out:
 697         phba->ktime_seg10_total += seg10;
 698         if (seg10 < phba->ktime_seg10_min)
 699                 phba->ktime_seg10_min = seg10;
 700         else if (seg10 > phba->ktime_seg10_max)
 701                 phba->ktime_seg10_max = seg10;
 702         phba->ktime_status_samples++;
 703 }
 704 #endif
 705
 706 /**
 707  * lpfc_nvmet_xmt_fcp_op_cmp - Completion handler for FCP Response
 708  * @phba: Pointer to HBA context object.
 709  * @cmdwqe: Pointer to driver command WQE object.
 710  * @wcqe: Pointer to driver response CQE object.
 711  *
 712  * The function is called from SLI ring event handler with no
 713  * lock held. This function is the completion handler for NVME FCP commands
 714  * The function frees memory resources used for the NVME commands.
 715  **/
 716 static void
 717 lpfc_nvmet_xmt_fcp_op_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
 718                           struct lpfc_wcqe_complete *wcqe)
 719 {
 720         struct lpfc_nvmet_tgtport *tgtp;
 721         struct nvmefc_tgt_fcp_req *rsp;
 722         struct lpfc_async_xchg_ctx *ctxp;
 723         uint32_t status, result, op, start_clean, logerr;
 724 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 725         int id;
 726 #endif
 727
 728         ctxp = cmdwqe->context2;
 729         ctxp->flag &= ~LPFC_NVME_IO_INP;
 730
 731         rsp = &ctxp->hdlrctx.fcp_req;
 732         op = rsp->op;
 733
 734         status = bf_get(lpfc_wcqe_c_status, wcqe);
 735         result = wcqe->parameter;
 736
 737         if (phba->targetport)
 738                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
 739         else
 740                 tgtp = NULL;
 741
 742         lpfc_nvmeio_data(phba, "NVMET FCP CMPL: xri x%x op x%x status x%x\n",
 743                          ctxp->oxid, op, status);
 744
 745         if (status) {
 746                 rsp->fcp_error = NVME_SC_DATA_XFER_ERROR;
 747                 rsp->transferred_length = 0;
 748                 if (tgtp) {
 749                         atomic_inc(&tgtp->xmt_fcp_rsp_error);
 750                         if (result == IOERR_ABORT_REQUESTED)
 751                                 atomic_inc(&tgtp->xmt_fcp_rsp_aborted);
 752                 }
 753
 754                 logerr = LOG_NVME_IOERR;
 755
 756                 /* pick up SLI4 exhange busy condition */
 757                 if (bf_get(lpfc_wcqe_c_xb, wcqe)) {
 758                         ctxp->flag |= LPFC_NVME_XBUSY;
 759                         logerr |= LOG_NVME_ABTS;
 760                         if (tgtp)
 761                                 atomic_inc(&tgtp->xmt_fcp_rsp_xb_set);
 762
 763                 } else {
 764                         ctxp->flag &= ~LPFC_NVME_XBUSY;
 765                 }
 766
 767                 lpfc_printf_log(phba, KERN_INFO, logerr,
 768                                 "6315 IO Error Cmpl oxid: x%x xri: x%x %x/%x "
 769                                 "XBUSY:x%x\n",
 770                                 ctxp->oxid, ctxp->ctxbuf->sglq->sli4_xritag,
 771                                 status, result, ctxp->flag);
 772
 773         } else {
 774                 rsp->fcp_error = NVME_SC_SUCCESS;
 775                 if (op == NVMET_FCOP_RSP)
 776                         rsp->transferred_length = rsp->rsplen;
 777                 else
 778                         rsp->transferred_length = rsp->transfer_length;
 779                 if (tgtp)
 780                         atomic_inc(&tgtp->xmt_fcp_rsp_cmpl);
 781         }
 782
 783         if ((op == NVMET_FCOP_READDATA_RSP) ||
 784             (op == NVMET_FCOP_RSP)) {
 785                 /* Sanity check */
 786                 ctxp->state = LPFC_NVME_STE_DONE;
 787                 ctxp->entry_cnt++;
 788
 789 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 790                 if (ctxp->ts_cmd_nvme) {
 791                         if (rsp->op == NVMET_FCOP_READDATA_RSP) {
 792                                 ctxp->ts_isr_data =
 793                                         cmdwqe->isr_timestamp;
 794                                 ctxp->ts_data_nvme =
 795                                         ktime_get_ns();
 796                                 ctxp->ts_nvme_status =
 797                                         ctxp->ts_data_nvme;
 798                                 ctxp->ts_status_wqput =
 799                                         ctxp->ts_data_nvme;
 800                                 ctxp->ts_isr_status =
 801                                         ctxp->ts_data_nvme;
 802                                 ctxp->ts_status_nvme =
 803                                         ctxp->ts_data_nvme;
 804                         } else {
 805                                 ctxp->ts_isr_status =
 806                                         cmdwqe->isr_timestamp;
 807                                 ctxp->ts_status_nvme =
 808                                         ktime_get_ns();
 809                         }
 810                 }
 811 #endif
 812                 rsp->done(rsp);
 813 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 814                 if (ctxp->ts_cmd_nvme)
 815                         lpfc_nvmet_ktime(phba, ctxp);
 816 #endif
 817                 /* lpfc_nvmet_xmt_fcp_release() will recycle the context */
 818         } else {
 819                 ctxp->entry_cnt++;
 820                 start_clean = offsetof(struct lpfc_iocbq, iocb_flag);
 821                 memset(((char *)cmdwqe) + start_clean, 0,
 822                        (sizeof(struct lpfc_iocbq) - start_clean));
 823 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 824                 if (ctxp->ts_cmd_nvme) {
 825                         ctxp->ts_isr_data = cmdwqe->isr_timestamp;
 826                         ctxp->ts_data_nvme = ktime_get_ns();
 827                 }
 828 #endif
 829                 rsp->done(rsp);
 830         }
 831 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 832         if (phba->hdwqstat_on & LPFC_CHECK_NVMET_IO) {
 833                 id = raw_smp_processor_id();
 834                 this_cpu_inc(phba->sli4_hba.c_stat->cmpl_io);
 835                 if (ctxp->cpu != id)
 836                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
 837                                         "6704 CPU Check cmdcmpl: "
 838                                         "cpu %d expect %d\n",
 839                                         id, ctxp->cpu);
 840         }
 841 #endif
 842 }
 843
 844 /**
 845  * __lpfc_nvme_xmt_ls_rsp - Generic service routine to issue transmit
 846  *         an NVME LS rsp for a prior NVME LS request that was received.
 847  * @axchg: pointer to exchange context for the NVME LS request the response
 848  *         is for.
 849  * @ls_rsp: pointer to the transport LS RSP that is to be sent
 850  * @xmt_ls_rsp_cmp: completion routine to call upon RSP transmit done
 851  *
 852  * This routine is used to format and send a WQE to transmit a NVME LS
 853  * Response.  The response is for a prior NVME LS request that was
 854  * received and posted to the transport.
 855  *
 856  * Returns:
 857  *  0 : if response successfully transmit
 858  *  non-zero : if response failed to transmit, of the form -Exxx.
 859  **/
 860 int
 861 __lpfc_nvme_xmt_ls_rsp(struct lpfc_async_xchg_ctx *axchg,
 862                         struct nvmefc_ls_rsp *ls_rsp,
 863                         void (*xmt_ls_rsp_cmp)(struct lpfc_hba *phba,
 864                                 struct lpfc_iocbq *cmdwqe,
 865                                 struct lpfc_wcqe_complete *wcqe))
 866 {
 867         struct lpfc_hba *phba = axchg->phba;
 868         struct hbq_dmabuf *nvmebuf = (struct hbq_dmabuf *)axchg->rqb_buffer;
 869         struct lpfc_iocbq *nvmewqeq;
 870         struct lpfc_dmabuf dmabuf;
 871         struct ulp_bde64 bpl;
 872         int rc;
 873
 874         if (phba->pport->load_flag & FC_UNLOADING)
 875                 return -ENODEV;
 876
 877         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
 878                         "6023 NVMEx LS rsp oxid x%x\n", axchg->oxid);
 879
 880         if (axchg->state != LPFC_NVME_STE_LS_RCV || axchg->entry_cnt != 1) {
 881                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 882                                 "6412 NVMEx LS rsp state mismatch "
 883                                 "oxid x%x: %d %d\n",
 884                                 axchg->oxid, axchg->state, axchg->entry_cnt);
 885                 return -EALREADY;
 886         }
 887         axchg->state = LPFC_NVME_STE_LS_RSP;
 888         axchg->entry_cnt++;
 889
 890         nvmewqeq = lpfc_nvmet_prep_ls_wqe(phba, axchg, ls_rsp->rspdma,
 891                                          ls_rsp->rsplen);
 892         if (nvmewqeq == NULL) {
 893                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 894                                 "6150 NVMEx LS Drop Rsp x%x: Prep\n",
 895                                 axchg->oxid);
 896                 rc = -ENOMEM;
 897                 goto out_free_buf;
 898         }
 899
 900         /* Save numBdes for bpl2sgl */
 901         nvmewqeq->rsvd2 = 1;
 902         nvmewqeq->hba_wqidx = 0;
 903         nvmewqeq->context3 = &dmabuf;
 904         dmabuf.virt = &bpl;
 905         bpl.addrLow = nvmewqeq->wqe.xmit_sequence.bde.addrLow;
 906         bpl.addrHigh = nvmewqeq->wqe.xmit_sequence.bde.addrHigh;
 907         bpl.tus.f.bdeSize = ls_rsp->rsplen;
 908         bpl.tus.f.bdeFlags = 0;
 909         bpl.tus.w = le32_to_cpu(bpl.tus.w);
 910         /*
 911          * Note: although we're using stack space for the dmabuf, the
 912          * call to lpfc_sli4_issue_wqe is synchronous, so it will not
 913          * be referenced after it returns back to this routine.
 914          */
 915
 916         nvmewqeq->wqe_cmpl = xmt_ls_rsp_cmp;
 917         nvmewqeq->iocb_cmpl = NULL;
 918         nvmewqeq->context2 = axchg;
 919
 920         lpfc_nvmeio_data(phba, "NVMEx LS RSP: xri x%x wqidx x%x len x%x\n",
 921                          axchg->oxid, nvmewqeq->hba_wqidx, ls_rsp->rsplen);
 922
 923         rc = lpfc_sli4_issue_wqe(phba, axchg->hdwq, nvmewqeq);
 924
 925         /* clear to be sure there's no reference */
 926         nvmewqeq->context3 = NULL;
 927
 928         if (rc == WQE_SUCCESS) {
 929                 /*
 930                  * Okay to repost buffer here, but wait till cmpl
 931                  * before freeing ctxp and iocbq.
 932                  */
 933                 lpfc_in_buf_free(phba, &nvmebuf->dbuf);
 934                 return 0;
 935         }
 936
 937         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 938                         "6151 NVMEx LS RSP x%x: failed to transmit %d\n",
 939                         axchg->oxid, rc);
 940
 941         rc = -ENXIO;
 942
 943         lpfc_nlp_put(nvmewqeq->context1);
 944
 945 out_free_buf:
 946         /* Give back resources */
 947         lpfc_in_buf_free(phba, &nvmebuf->dbuf);
 948
 949         /*
 950          * As transport doesn't track completions of responses, if the rsp
 951          * fails to send, the transport will effectively ignore the rsp
 952          * and consider the LS done. However, the driver has an active
 953          * exchange open for the LS - so be sure to abort the exchange
 954          * if the response isn't sent.
 955          */
 956         lpfc_nvme_unsol_ls_issue_abort(phba, axchg, axchg->sid, axchg->oxid);
 957         return rc;
 958 }
 959
 960 /**
 961  * lpfc_nvmet_xmt_ls_rsp - Transmit NVME LS response
 962  * @tgtport: pointer to target port that NVME LS is to be transmit from.
 963  * @ls_rsp: pointer to the transport LS RSP that is to be sent
 964  *
 965  * Driver registers this routine to transmit responses for received NVME
 966  * LS requests.
 967  *
 968  * This routine is used to format and send a WQE to transmit a NVME LS
 969  * Response. The ls_rsp is used to reverse-map the LS to the original
 970  * NVME LS request sequence, which provides addressing information for
 971  * the remote port the LS to be sent to, as well as the exchange id
 972  * that is the LS is bound to.
 973  *
 974  * Returns:
 975  *  0 : if response successfully transmit
 976  *  non-zero : if response failed to transmit, of the form -Exxx.
 977  **/
 978 static int
 979 lpfc_nvmet_xmt_ls_rsp(struct nvmet_fc_target_port *tgtport,
 980                       struct nvmefc_ls_rsp *ls_rsp)
 981 {
 982         struct lpfc_async_xchg_ctx *axchg =
 983                 container_of(ls_rsp, struct lpfc_async_xchg_ctx, ls_rsp);
 984         struct lpfc_nvmet_tgtport *nvmep = tgtport->private;
 985         int rc;
 986
 987         if (axchg->phba->pport->load_flag & FC_UNLOADING)
 988                 return -ENODEV;
 989
 990         rc = __lpfc_nvme_xmt_ls_rsp(axchg, ls_rsp, lpfc_nvmet_xmt_ls_rsp_cmp);
 991
 992         if (rc) {
 993                 atomic_inc(&nvmep->xmt_ls_drop);
 994                 /*
 995                  * unless the failure is due to having already sent
 996                  * the response, an abort will be generated for the
 997                  * exchange if the rsp can't be sent.
 998                  */
 999                 if (rc != -EALREADY)
1000                         atomic_inc(&nvmep->xmt_ls_abort);
1001                 return rc;
1002         }
1003
1004         atomic_inc(&nvmep->xmt_ls_rsp);
1005         return 0;
1006 }
1007
1008 static int
1009 lpfc_nvmet_xmt_fcp_op(struct nvmet_fc_target_port *tgtport,
1010                       struct nvmefc_tgt_fcp_req *rsp)
1011 {
1012         struct lpfc_nvmet_tgtport *lpfc_nvmep = tgtport->private;
1013         struct lpfc_async_xchg_ctx *ctxp =
1014                 container_of(rsp, struct lpfc_async_xchg_ctx, hdlrctx.fcp_req);
1015         struct lpfc_hba *phba = ctxp->phba;
1016         struct lpfc_queue *wq;
1017         struct lpfc_iocbq *nvmewqeq;
1018         struct lpfc_sli_ring *pring;
1019         unsigned long iflags;
1020         int rc;
1021 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1022         int id;
1023 #endif
1024
1025         if (phba->pport->load_flag & FC_UNLOADING) {
1026                 rc = -ENODEV;
1027                 goto aerr;
1028         }
1029
1030 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1031         if (ctxp->ts_cmd_nvme) {
1032                 if (rsp->op == NVMET_FCOP_RSP)
1033                         ctxp->ts_nvme_status = ktime_get_ns();
1034                 else
1035                         ctxp->ts_nvme_data = ktime_get_ns();
1036         }
1037
1038         /* Setup the hdw queue if not already set */
1039         if (!ctxp->hdwq)
1040                 ctxp->hdwq = &phba->sli4_hba.hdwq[rsp->hwqid];
1041
1042         if (phba->hdwqstat_on & LPFC_CHECK_NVMET_IO) {
1043                 id = raw_smp_processor_id();
1044                 this_cpu_inc(phba->sli4_hba.c_stat->xmt_io);
1045                 if (rsp->hwqid != id)
1046                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
1047                                         "6705 CPU Check OP: "
1048                                         "cpu %d expect %d\n",
1049                                         id, rsp->hwqid);
1050                 ctxp->cpu = id; /* Setup cpu for cmpl check */
1051         }
1052 #endif
1053
1054         /* Sanity check */
1055         if ((ctxp->flag & LPFC_NVME_ABTS_RCV) ||
1056             (ctxp->state == LPFC_NVME_STE_ABORT)) {
1057                 atomic_inc(&lpfc_nvmep->xmt_fcp_drop);
1058                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1059                                 "6102 IO oxid x%x aborted\n",
1060                                 ctxp->oxid);
1061                 rc = -ENXIO;
1062                 goto aerr;
1063         }
1064
1065         nvmewqeq = lpfc_nvmet_prep_fcp_wqe(phba, ctxp);
1066         if (nvmewqeq == NULL) {
1067                 atomic_inc(&lpfc_nvmep->xmt_fcp_drop);
1068                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1069                                 "6152 FCP Drop IO x%x: Prep\n",
1070                                 ctxp->oxid);
1071                 rc = -ENXIO;
1072                 goto aerr;
1073         }
1074
1075         nvmewqeq->wqe_cmpl = lpfc_nvmet_xmt_fcp_op_cmp;
1076         nvmewqeq->iocb_cmpl = NULL;
1077         nvmewqeq->context2 = ctxp;
1078         nvmewqeq->iocb_flag |=  LPFC_IO_NVMET;
1079         ctxp->wqeq->hba_wqidx = rsp->hwqid;
1080
1081         lpfc_nvmeio_data(phba, "NVMET FCP CMND: xri x%x op x%x len x%x\n",
1082                          ctxp->oxid, rsp->op, rsp->rsplen);
1083
1084         ctxp->flag |= LPFC_NVME_IO_INP;
1085         rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, nvmewqeq);
1086         if (rc == WQE_SUCCESS) {
1087 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1088                 if (!ctxp->ts_cmd_nvme)
1089                         return 0;
1090                 if (rsp->op == NVMET_FCOP_RSP)
1091                         ctxp->ts_status_wqput = ktime_get_ns();
1092                 else
1093                         ctxp->ts_data_wqput = ktime_get_ns();
1094 #endif
1095                 return 0;
1096         }
1097
1098         if (rc == -EBUSY) {
1099                 /*
1100                  * WQ was full, so queue nvmewqeq to be sent after
1101                  * WQE release CQE
1102                  */
1103                 ctxp->flag |= LPFC_NVME_DEFER_WQFULL;
1104                 wq = ctxp->hdwq->io_wq;
1105                 pring = wq->pring;
1106                 spin_lock_irqsave(&pring->ring_lock, iflags);
1107                 list_add_tail(&nvmewqeq->list, &wq->wqfull_list);
1108                 wq->q_flag |= HBA_NVMET_WQFULL;
1109                 spin_unlock_irqrestore(&pring->ring_lock, iflags);
1110                 atomic_inc(&lpfc_nvmep->defer_wqfull);
1111                 return 0;
1112         }
1113
1114         /* Give back resources */
1115         atomic_inc(&lpfc_nvmep->xmt_fcp_drop);
1116         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1117                         "6153 FCP Drop IO x%x: Issue: %d\n",
1118                         ctxp->oxid, rc);
1119
1120         ctxp->wqeq->hba_wqidx = 0;
1121         nvmewqeq->context2 = NULL;
1122         nvmewqeq->context3 = NULL;
1123         rc = -EBUSY;
1124 aerr:
1125         return rc;
1126 }
1127
1128 static void
1129 lpfc_nvmet_targetport_delete(struct nvmet_fc_target_port *targetport)
1130 {
1131         struct lpfc_nvmet_tgtport *tport = targetport->private;
1132
1133         /* release any threads waiting for the unreg to complete */
1134         if (tport->phba->targetport)
1135                 complete(tport->tport_unreg_cmp);
1136 }
1137
1138 static void
1139 lpfc_nvmet_xmt_fcp_abort(struct nvmet_fc_target_port *tgtport,
1140                          struct nvmefc_tgt_fcp_req *req)
1141 {
1142         struct lpfc_nvmet_tgtport *lpfc_nvmep = tgtport->private;
1143         struct lpfc_async_xchg_ctx *ctxp =
1144                 container_of(req, struct lpfc_async_xchg_ctx, hdlrctx.fcp_req);
1145         struct lpfc_hba *phba = ctxp->phba;
1146         struct lpfc_queue *wq;
1147         unsigned long flags;
1148
1149         if (phba->pport->load_flag & FC_UNLOADING)
1150                 return;
1151
1152         if (!ctxp->hdwq)
1153                 ctxp->hdwq = &phba->sli4_hba.hdwq[0];
1154
1155         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1156                         "6103 NVMET Abort op: oxid x%x flg x%x ste %d\n",
1157                         ctxp->oxid, ctxp->flag, ctxp->state);
1158
1159         lpfc_nvmeio_data(phba, "NVMET FCP ABRT: xri x%x flg x%x ste x%x\n",
1160                          ctxp->oxid, ctxp->flag, ctxp->state);
1161
1162         atomic_inc(&lpfc_nvmep->xmt_fcp_abort);
1163
1164         spin_lock_irqsave(&ctxp->ctxlock, flags);
1165
1166         /* Since iaab/iaar are NOT set, we need to check
1167          * if the firmware is in process of aborting IO
1168          */
1169         if (ctxp->flag & (LPFC_NVME_XBUSY | LPFC_NVME_ABORT_OP)) {
1170                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
1171                 return;
1172         }
1173         ctxp->flag |= LPFC_NVME_ABORT_OP;
1174
1175         if (ctxp->flag & LPFC_NVME_DEFER_WQFULL) {
1176                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
1177                 lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid,
1178                                                  ctxp->oxid);
1179                 wq = ctxp->hdwq->io_wq;
1180                 lpfc_nvmet_wqfull_flush(phba, wq, ctxp);
1181                 return;
1182         }
1183         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
1184
1185         /* A state of LPFC_NVME_STE_RCV means we have just received
1186          * the NVME command and have not started processing it.
1187          * (by issuing any IO WQEs on this exchange yet)
1188          */
1189         if (ctxp->state == LPFC_NVME_STE_RCV)
1190                 lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid,
1191                                                  ctxp->oxid);
1192         else
1193                 lpfc_nvmet_sol_fcp_issue_abort(phba, ctxp, ctxp->sid,
1194                                                ctxp->oxid);
1195 }
1196
1197 static void
1198 lpfc_nvmet_xmt_fcp_release(struct nvmet_fc_target_port *tgtport,
1199                            struct nvmefc_tgt_fcp_req *rsp)
1200 {
1201         struct lpfc_nvmet_tgtport *lpfc_nvmep = tgtport->private;
1202         struct lpfc_async_xchg_ctx *ctxp =
1203                 container_of(rsp, struct lpfc_async_xchg_ctx, hdlrctx.fcp_req);
1204         struct lpfc_hba *phba = ctxp->phba;
1205         unsigned long flags;
1206         bool aborting = false;
1207
1208         spin_lock_irqsave(&ctxp->ctxlock, flags);
1209         if (ctxp->flag & LPFC_NVME_XBUSY)
1210                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
1211                                 "6027 NVMET release with XBUSY flag x%x"
1212                                 " oxid x%x\n",
1213                                 ctxp->flag, ctxp->oxid);
1214         else if (ctxp->state != LPFC_NVME_STE_DONE &&
1215                  ctxp->state != LPFC_NVME_STE_ABORT)
1216                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1217                                 "6413 NVMET release bad state %d %d oxid x%x\n",
1218                                 ctxp->state, ctxp->entry_cnt, ctxp->oxid);
1219
1220         if ((ctxp->flag & LPFC_NVME_ABORT_OP) ||
1221             (ctxp->flag & LPFC_NVME_XBUSY)) {
1222                 aborting = true;
1223                 /* let the abort path do the real release */
1224                 lpfc_nvmet_defer_release(phba, ctxp);
1225         }
1226         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
1227
1228         lpfc_nvmeio_data(phba, "NVMET FCP FREE: xri x%x ste %d abt %d\n", ctxp->oxid,
1229                          ctxp->state, aborting);
1230
1231         atomic_inc(&lpfc_nvmep->xmt_fcp_release);
1232         ctxp->flag &= ~LPFC_NVME_TNOTIFY;
1233
1234         if (aborting)
1235                 return;
1236
1237         lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
1238 }
1239
1240 static void
1241 lpfc_nvmet_defer_rcv(struct nvmet_fc_target_port *tgtport,
1242                      struct nvmefc_tgt_fcp_req *rsp)
1243 {
1244         struct lpfc_nvmet_tgtport *tgtp;
1245         struct lpfc_async_xchg_ctx *ctxp =
1246                 container_of(rsp, struct lpfc_async_xchg_ctx, hdlrctx.fcp_req);
1247         struct rqb_dmabuf *nvmebuf = ctxp->rqb_buffer;
1248         struct lpfc_hba *phba = ctxp->phba;
1249         unsigned long iflag;
1250
1251
1252         lpfc_nvmeio_data(phba, "NVMET DEFERRCV: xri x%x sz %d CPU %02x\n",
1253                          ctxp->oxid, ctxp->size, raw_smp_processor_id());
1254
1255         if (!nvmebuf) {
1256                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
1257                                 "6425 Defer rcv: no buffer oxid x%x: "
1258                                 "flg %x ste %x\n",
1259                                 ctxp->oxid, ctxp->flag, ctxp->state);
1260                 return;
1261         }
1262
1263         tgtp = phba->targetport->private;
1264         if (tgtp)
1265                 atomic_inc(&tgtp->rcv_fcp_cmd_defer);
1266
1267         /* Free the nvmebuf since a new buffer already replaced it */
1268         nvmebuf->hrq->rqbp->rqb_free_buffer(phba, nvmebuf);
1269         spin_lock_irqsave(&ctxp->ctxlock, iflag);
1270         ctxp->rqb_buffer = NULL;
1271         spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1272 }
1273
1274 /**
1275  * lpfc_nvmet_ls_req_cmp - completion handler for a nvme ls request
1276  * @phba: Pointer to HBA context object
1277  * @cmdwqe: Pointer to driver command WQE object.
1278  * @wcqe: Pointer to driver response CQE object.
1279  *
1280  * This function is the completion handler for NVME LS requests.
1281  * The function updates any states and statistics, then calls the
1282  * generic completion handler to finish completion of the request.
1283  **/
1284 static void
1285 lpfc_nvmet_ls_req_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
1286                        struct lpfc_wcqe_complete *wcqe)
1287 {
1288         __lpfc_nvme_ls_req_cmp(phba, cmdwqe->vport, cmdwqe, wcqe);
1289 }
1290
1291 /**
1292  * lpfc_nvmet_ls_req - Issue an Link Service request
1293  * @targetport: pointer to target instance registered with nvmet transport.
1294  * @hosthandle: hosthandle set by the driver in a prior ls_rqst_rcv.
1295  *               Driver sets this value to the ndlp pointer.
1296  * @pnvme_lsreq: the transport nvme_ls_req structure for the LS
1297  *
1298  * Driver registers this routine to handle any link service request
1299  * from the nvme_fc transport to a remote nvme-aware port.
1300  *
1301  * Return value :
1302  *   0 - Success
1303  *   non-zero: various error codes, in form of -Exxx
1304  **/
1305 static int
1306 lpfc_nvmet_ls_req(struct nvmet_fc_target_port *targetport,
1307                   void *hosthandle,
1308                   struct nvmefc_ls_req *pnvme_lsreq)
1309 {
1310         struct lpfc_nvmet_tgtport *lpfc_nvmet = targetport->private;
1311         struct lpfc_hba *phba;
1312         struct lpfc_nodelist *ndlp;
1313         int ret;
1314         u32 hstate;
1315
1316         if (!lpfc_nvmet)
1317                 return -EINVAL;
1318
1319         phba = lpfc_nvmet->phba;
1320         if (phba->pport->load_flag & FC_UNLOADING)
1321                 return -EINVAL;
1322
1323         hstate = atomic_read(&lpfc_nvmet->state);
1324         if (hstate == LPFC_NVMET_INV_HOST_ACTIVE)
1325                 return -EACCES;
1326
1327         ndlp = (struct lpfc_nodelist *)hosthandle;
1328
1329         ret = __lpfc_nvme_ls_req(phba->pport, ndlp, pnvme_lsreq,
1330                                  lpfc_nvmet_ls_req_cmp);
1331
1332         return ret;
1333 }
1334
1335 /**
1336  * lpfc_nvmet_ls_abort - Abort a prior NVME LS request
1337  * @targetport: Transport targetport, that LS was issued from.
1338  * @hosthandle: hosthandle set by the driver in a prior ls_rqst_rcv.
1339  *               Driver sets this value to the ndlp pointer.
1340  * @pnvme_lsreq: the transport nvme_ls_req structure for LS to be aborted
1341  *
1342  * Driver registers this routine to abort an NVME LS request that is
1343  * in progress (from the transports perspective).
1344  **/
1345 static void
1346 lpfc_nvmet_ls_abort(struct nvmet_fc_target_port *targetport,
1347                     void *hosthandle,
1348                     struct nvmefc_ls_req *pnvme_lsreq)
1349 {
1350         struct lpfc_nvmet_tgtport *lpfc_nvmet = targetport->private;
1351         struct lpfc_hba *phba;
1352         struct lpfc_nodelist *ndlp;
1353         int ret;
1354
1355         phba = lpfc_nvmet->phba;
1356         if (phba->pport->load_flag & FC_UNLOADING)
1357                 return;
1358
1359         ndlp = (struct lpfc_nodelist *)hosthandle;
1360
1361         ret = __lpfc_nvme_ls_abort(phba->pport, ndlp, pnvme_lsreq);
1362         if (!ret)
1363                 atomic_inc(&lpfc_nvmet->xmt_ls_abort);
1364 }
1365
1366 static void
1367 lpfc_nvmet_host_release(void *hosthandle)
1368 {
1369         struct lpfc_nodelist *ndlp = hosthandle;
1370         struct lpfc_hba *phba = ndlp->phba;
1371         struct lpfc_nvmet_tgtport *tgtp;
1372
1373         if (!phba->targetport || !phba->targetport->private)
1374                 return;
1375
1376         lpfc_printf_log(phba, KERN_ERR, LOG_NVME,
1377                         "6202 NVMET XPT releasing hosthandle x%px "
1378                         "DID x%x xflags x%x refcnt %d\n",
1379                         hosthandle, ndlp->nlp_DID, ndlp->fc4_xpt_flags,
1380                         kref_read(&ndlp->kref));
1381         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
1382         spin_lock_irq(&ndlp->lock);
1383         ndlp->fc4_xpt_flags &= ~NLP_XPT_HAS_HH;
1384         spin_unlock_irq(&ndlp->lock);
1385         lpfc_nlp_put(ndlp);
1386         atomic_set(&tgtp->state, 0);
1387 }
1388
1389 static void
1390 lpfc_nvmet_discovery_event(struct nvmet_fc_target_port *tgtport)
1391 {
1392         struct lpfc_nvmet_tgtport *tgtp;
1393         struct lpfc_hba *phba;
1394         uint32_t rc;
1395
1396         tgtp = tgtport->private;
1397         phba = tgtp->phba;
1398
1399         rc = lpfc_issue_els_rscn(phba->pport, 0);
1400         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1401                         "6420 NVMET subsystem change: Notification %s\n",
1402                         (rc) ? "Failed" : "Sent");
1403 }
1404
1405 static struct nvmet_fc_target_template lpfc_tgttemplate = {
1406         .targetport_delete = lpfc_nvmet_targetport_delete,
1407         .xmt_ls_rsp     = lpfc_nvmet_xmt_ls_rsp,
1408         .fcp_op         = lpfc_nvmet_xmt_fcp_op,
1409         .fcp_abort      = lpfc_nvmet_xmt_fcp_abort,
1410         .fcp_req_release = lpfc_nvmet_xmt_fcp_release,
1411         .defer_rcv      = lpfc_nvmet_defer_rcv,
1412         .discovery_event = lpfc_nvmet_discovery_event,
1413         .ls_req         = lpfc_nvmet_ls_req,
1414         .ls_abort       = lpfc_nvmet_ls_abort,
1415         .host_release   = lpfc_nvmet_host_release,
1416
1417         .max_hw_queues  = 1,
1418         .max_sgl_segments = LPFC_NVMET_DEFAULT_SEGS,
1419         .max_dif_sgl_segments = LPFC_NVMET_DEFAULT_SEGS,
1420         .dma_boundary = 0xFFFFFFFF,
1421
1422         /* optional features */
1423         .target_features = 0,
1424         /* sizes of additional private data for data structures */
1425         .target_priv_sz = sizeof(struct lpfc_nvmet_tgtport),
1426         .lsrqst_priv_sz = 0,
1427 };
1428
1429 static void
1430 __lpfc_nvmet_clean_io_for_cpu(struct lpfc_hba *phba,
1431                 struct lpfc_nvmet_ctx_info *infop)
1432 {
1433         struct lpfc_nvmet_ctxbuf *ctx_buf, *next_ctx_buf;
1434         unsigned long flags;
1435
1436         spin_lock_irqsave(&infop->nvmet_ctx_list_lock, flags);
1437         list_for_each_entry_safe(ctx_buf, next_ctx_buf,
1438                                 &infop->nvmet_ctx_list, list) {
1439                 spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1440                 list_del_init(&ctx_buf->list);
1441                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1442
1443                 spin_lock(&phba->hbalock);
1444                 __lpfc_clear_active_sglq(phba, ctx_buf->sglq->sli4_lxritag);
1445                 spin_unlock(&phba->hbalock);
1446
1447                 ctx_buf->sglq->state = SGL_FREED;
1448                 ctx_buf->sglq->ndlp = NULL;
1449
1450                 spin_lock(&phba->sli4_hba.sgl_list_lock);
1451                 list_add_tail(&ctx_buf->sglq->list,
1452                                 &phba->sli4_hba.lpfc_nvmet_sgl_list);
1453                 spin_unlock(&phba->sli4_hba.sgl_list_lock);
1454
1455                 lpfc_sli_release_iocbq(phba, ctx_buf->iocbq);
1456                 kfree(ctx_buf->context);
1457         }
1458         spin_unlock_irqrestore(&infop->nvmet_ctx_list_lock, flags);
1459 }
1460
1461 static void
1462 lpfc_nvmet_cleanup_io_context(struct lpfc_hba *phba)
1463 {
1464         struct lpfc_nvmet_ctx_info *infop;
1465         int i, j;
1466
1467         /* The first context list, MRQ 0 CPU 0 */
1468         infop = phba->sli4_hba.nvmet_ctx_info;
1469         if (!infop)
1470                 return;
1471
1472         /* Cycle the the entire CPU context list for every MRQ */
1473         for (i = 0; i < phba->cfg_nvmet_mrq; i++) {
1474                 for_each_present_cpu(j) {
1475                         infop = lpfc_get_ctx_list(phba, j, i);
1476                         __lpfc_nvmet_clean_io_for_cpu(phba, infop);
1477                 }
1478         }
1479         kfree(phba->sli4_hba.nvmet_ctx_info);
1480         phba->sli4_hba.nvmet_ctx_info = NULL;
1481 }
1482
1483 static int
1484 lpfc_nvmet_setup_io_context(struct lpfc_hba *phba)
1485 {
1486         struct lpfc_nvmet_ctxbuf *ctx_buf;
1487         struct lpfc_iocbq *nvmewqe;
1488         union lpfc_wqe128 *wqe;
1489         struct lpfc_nvmet_ctx_info *last_infop;
1490         struct lpfc_nvmet_ctx_info *infop;
1491         int i, j, idx, cpu;
1492
1493         lpfc_printf_log(phba, KERN_INFO, LOG_NVME,
1494                         "6403 Allocate NVMET resources for %d XRIs\n",
1495                         phba->sli4_hba.nvmet_xri_cnt);
1496
1497         phba->sli4_hba.nvmet_ctx_info = kcalloc(
1498                 phba->sli4_hba.num_possible_cpu * phba->cfg_nvmet_mrq,
1499                 sizeof(struct lpfc_nvmet_ctx_info), GFP_KERNEL);
1500         if (!phba->sli4_hba.nvmet_ctx_info) {
1501                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1502                                 "6419 Failed allocate memory for "
1503                                 "nvmet context lists\n");
1504                 return -ENOMEM;
1505         }
1506
1507         /*
1508          * Assuming X CPUs in the system, and Y MRQs, allocate some
1509          * lpfc_nvmet_ctx_info structures as follows:
1510          *
1511          * cpu0/mrq0 cpu1/mrq0 ... cpuX/mrq0
1512          * cpu0/mrq1 cpu1/mrq1 ... cpuX/mrq1
1513          * ...
1514          * cpuX/mrqY cpuX/mrqY ... cpuX/mrqY
1515          *
1516          * Each line represents a MRQ "silo" containing an entry for
1517          * every CPU.
1518          *
1519          * MRQ X is initially assumed to be associated with CPU X, thus
1520          * contexts are initially distributed across all MRQs using
1521          * the MRQ index (N) as follows cpuN/mrqN. When contexts are
1522          * freed, the are freed to the MRQ silo based on the CPU number
1523          * of the IO completion. Thus a context that was allocated for MRQ A
1524          * whose IO completed on CPU B will be freed to cpuB/mrqA.
1525          */
1526         for_each_possible_cpu(i) {
1527                 for (j = 0; j < phba->cfg_nvmet_mrq; j++) {
1528                         infop = lpfc_get_ctx_list(phba, i, j);
1529                         INIT_LIST_HEAD(&infop->nvmet_ctx_list);
1530                         spin_lock_init(&infop->nvmet_ctx_list_lock);
1531                         infop->nvmet_ctx_list_cnt = 0;
1532                 }
1533         }
1534
1535         /*
1536          * Setup the next CPU context info ptr for each MRQ.
1537          * MRQ 0 will cycle thru CPUs 0 - X separately from
1538          * MRQ 1 cycling thru CPUs 0 - X, and so on.
1539          */
1540         for (j = 0; j < phba->cfg_nvmet_mrq; j++) {
1541                 last_infop = lpfc_get_ctx_list(phba,
1542                                                cpumask_first(cpu_present_mask),
1543                                                j);
1544                 for (i = phba->sli4_hba.num_possible_cpu - 1;  i >= 0; i--) {
1545                         infop = lpfc_get_ctx_list(phba, i, j);
1546                         infop->nvmet_ctx_next_cpu = last_infop;
1547                         last_infop = infop;
1548                 }
1549         }
1550
1551         /* For all nvmet xris, allocate resources needed to process a
1552          * received command on a per xri basis.
1553          */
1554         idx = 0;
1555         cpu = cpumask_first(cpu_present_mask);
1556         for (i = 0; i < phba->sli4_hba.nvmet_xri_cnt; i++) {
1557                 ctx_buf = kzalloc(sizeof(*ctx_buf), GFP_KERNEL);
1558                 if (!ctx_buf) {
1559                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1560                                         "6404 Ran out of memory for NVMET\n");
1561                         return -ENOMEM;
1562                 }
1563
1564                 ctx_buf->context = kzalloc(sizeof(*ctx_buf->context),
1565                                            GFP_KERNEL);
1566                 if (!ctx_buf->context) {
1567                         kfree(ctx_buf);
1568                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1569                                         "6405 Ran out of NVMET "
1570                                         "context memory\n");
1571                         return -ENOMEM;
1572                 }
1573                 ctx_buf->context->ctxbuf = ctx_buf;
1574                 ctx_buf->context->state = LPFC_NVME_STE_FREE;
1575
1576                 ctx_buf->iocbq = lpfc_sli_get_iocbq(phba);
1577                 if (!ctx_buf->iocbq) {
1578                         kfree(ctx_buf->context);
1579                         kfree(ctx_buf);
1580                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1581                                         "6406 Ran out of NVMET iocb/WQEs\n");
1582                         return -ENOMEM;
1583                 }
1584                 ctx_buf->iocbq->iocb_flag = LPFC_IO_NVMET;
1585                 nvmewqe = ctx_buf->iocbq;
1586                 wqe = &nvmewqe->wqe;
1587
1588                 /* Initialize WQE */
1589                 memset(wqe, 0, sizeof(union lpfc_wqe));
1590
1591                 ctx_buf->iocbq->context1 = NULL;
1592                 spin_lock(&phba->sli4_hba.sgl_list_lock);
1593                 ctx_buf->sglq = __lpfc_sli_get_nvmet_sglq(phba, ctx_buf->iocbq);
1594                 spin_unlock(&phba->sli4_hba.sgl_list_lock);
1595                 if (!ctx_buf->sglq) {
1596                         lpfc_sli_release_iocbq(phba, ctx_buf->iocbq);
1597                         kfree(ctx_buf->context);
1598                         kfree(ctx_buf);
1599                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1600                                         "6407 Ran out of NVMET XRIs\n");
1601                         return -ENOMEM;
1602                 }
1603                 INIT_WORK(&ctx_buf->defer_work, lpfc_nvmet_fcp_rqst_defer_work);
1604
1605                 /*
1606                  * Add ctx to MRQidx context list. Our initial assumption
1607                  * is MRQidx will be associated with CPUidx. This association
1608                  * can change on the fly.
1609                  */
1610                 infop = lpfc_get_ctx_list(phba, cpu, idx);
1611                 spin_lock(&infop->nvmet_ctx_list_lock);
1612                 list_add_tail(&ctx_buf->list, &infop->nvmet_ctx_list);
1613                 infop->nvmet_ctx_list_cnt++;
1614                 spin_unlock(&infop->nvmet_ctx_list_lock);
1615
1616                 /* Spread ctx structures evenly across all MRQs */
1617                 idx++;
1618                 if (idx >= phba->cfg_nvmet_mrq) {
1619                         idx = 0;
1620                         cpu = cpumask_first(cpu_present_mask);
1621                         continue;
1622                 }
1623                 cpu = cpumask_next(cpu, cpu_present_mask);
1624                 if (cpu == nr_cpu_ids)
1625                         cpu = cpumask_first(cpu_present_mask);
1626
1627         }
1628
1629         for_each_present_cpu(i) {
1630                 for (j = 0; j < phba->cfg_nvmet_mrq; j++) {
1631                         infop = lpfc_get_ctx_list(phba, i, j);
1632                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME | LOG_INIT,
1633                                         "6408 TOTAL NVMET ctx for CPU %d "
1634                                         "MRQ %d: cnt %d nextcpu x%px\n",
1635                                         i, j, infop->nvmet_ctx_list_cnt,
1636                                         infop->nvmet_ctx_next_cpu);
1637                 }
1638         }
1639         return 0;
1640 }
1641
1642 int
1643 lpfc_nvmet_create_targetport(struct lpfc_hba *phba)
1644 {
1645         struct lpfc_vport  *vport = phba->pport;
1646         struct lpfc_nvmet_tgtport *tgtp;
1647         struct nvmet_fc_port_info pinfo;
1648         int error;
1649
1650         if (phba->targetport)
1651                 return 0;
1652
1653         error = lpfc_nvmet_setup_io_context(phba);
1654         if (error)
1655                 return error;
1656
1657         memset(&pinfo, 0, sizeof(struct nvmet_fc_port_info));
1658         pinfo.node_name = wwn_to_u64(vport->fc_nodename.u.wwn);
1659         pinfo.port_name = wwn_to_u64(vport->fc_portname.u.wwn);
1660         pinfo.port_id = vport->fc_myDID;
1661
1662         /* We need to tell the transport layer + 1 because it takes page
1663          * alignment into account. When space for the SGL is allocated we
1664          * allocate + 3, one for cmd, one for rsp and one for this alignment
1665          */
1666         lpfc_tgttemplate.max_sgl_segments = phba->cfg_nvme_seg_cnt + 1;
1667         lpfc_tgttemplate.max_hw_queues = phba->cfg_hdw_queue;
1668         lpfc_tgttemplate.target_features = NVMET_FCTGTFEAT_READDATA_RSP;
1669
1670 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
1671         error = nvmet_fc_register_targetport(&pinfo, &lpfc_tgttemplate,
1672                                              &phba->pcidev->dev,
1673                                              &phba->targetport);
1674 #else
1675         error = -ENOENT;
1676 #endif
1677         if (error) {
1678                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1679                                 "6025 Cannot register NVME targetport x%x: "
1680                                 "portnm %llx nodenm %llx segs %d qs %d\n",
1681                                 error,
1682                                 pinfo.port_name, pinfo.node_name,
1683                                 lpfc_tgttemplate.max_sgl_segments,
1684                                 lpfc_tgttemplate.max_hw_queues);
1685                 phba->targetport = NULL;
1686                 phba->nvmet_support = 0;
1687
1688                 lpfc_nvmet_cleanup_io_context(phba);
1689
1690         } else {
1691                 tgtp = (struct lpfc_nvmet_tgtport *)
1692                         phba->targetport->private;
1693                 tgtp->phba = phba;
1694
1695                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
1696                                 "6026 Registered NVME "
1697                                 "targetport: x%px, private x%px "
1698                                 "portnm %llx nodenm %llx segs %d qs %d\n",
1699                                 phba->targetport, tgtp,
1700                                 pinfo.port_name, pinfo.node_name,
1701                                 lpfc_tgttemplate.max_sgl_segments,
1702                                 lpfc_tgttemplate.max_hw_queues);
1703
1704                 atomic_set(&tgtp->rcv_ls_req_in, 0);
1705                 atomic_set(&tgtp->rcv_ls_req_out, 0);
1706                 atomic_set(&tgtp->rcv_ls_req_drop, 0);
1707                 atomic_set(&tgtp->xmt_ls_abort, 0);
1708                 atomic_set(&tgtp->xmt_ls_abort_cmpl, 0);
1709                 atomic_set(&tgtp->xmt_ls_rsp, 0);
1710                 atomic_set(&tgtp->xmt_ls_drop, 0);
1711                 atomic_set(&tgtp->xmt_ls_rsp_error, 0);
1712                 atomic_set(&tgtp->xmt_ls_rsp_xb_set, 0);
1713                 atomic_set(&tgtp->xmt_ls_rsp_aborted, 0);
1714                 atomic_set(&tgtp->xmt_ls_rsp_cmpl, 0);
1715                 atomic_set(&tgtp->rcv_fcp_cmd_in, 0);
1716                 atomic_set(&tgtp->rcv_fcp_cmd_out, 0);
1717                 atomic_set(&tgtp->rcv_fcp_cmd_drop, 0);
1718                 atomic_set(&tgtp->xmt_fcp_drop, 0);
1719                 atomic_set(&tgtp->xmt_fcp_read_rsp, 0);
1720                 atomic_set(&tgtp->xmt_fcp_read, 0);
1721                 atomic_set(&tgtp->xmt_fcp_write, 0);
1722                 atomic_set(&tgtp->xmt_fcp_rsp, 0);
1723                 atomic_set(&tgtp->xmt_fcp_release, 0);
1724                 atomic_set(&tgtp->xmt_fcp_rsp_cmpl, 0);
1725                 atomic_set(&tgtp->xmt_fcp_rsp_error, 0);
1726                 atomic_set(&tgtp->xmt_fcp_rsp_xb_set, 0);
1727                 atomic_set(&tgtp->xmt_fcp_rsp_aborted, 0);
1728                 atomic_set(&tgtp->xmt_fcp_rsp_drop, 0);
1729                 atomic_set(&tgtp->xmt_fcp_xri_abort_cqe, 0);
1730                 atomic_set(&tgtp->xmt_fcp_abort, 0);
1731                 atomic_set(&tgtp->xmt_fcp_abort_cmpl, 0);
1732                 atomic_set(&tgtp->xmt_abort_unsol, 0);
1733                 atomic_set(&tgtp->xmt_abort_sol, 0);
1734                 atomic_set(&tgtp->xmt_abort_rsp, 0);
1735                 atomic_set(&tgtp->xmt_abort_rsp_error, 0);
1736                 atomic_set(&tgtp->defer_ctx, 0);
1737                 atomic_set(&tgtp->defer_fod, 0);
1738                 atomic_set(&tgtp->defer_wqfull, 0);
1739         }
1740         return error;
1741 }
1742
1743 int
1744 lpfc_nvmet_update_targetport(struct lpfc_hba *phba)
1745 {
1746         struct lpfc_vport  *vport = phba->pport;
1747
1748         if (!phba->targetport)
1749                 return 0;
1750
1751         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
1752                          "6007 Update NVMET port x%px did x%x\n",
1753                          phba->targetport, vport->fc_myDID);
1754
1755         phba->targetport->port_id = vport->fc_myDID;
1756         return 0;
1757 }
1758
1759 /**
1760  * lpfc_sli4_nvmet_xri_aborted - Fast-path process of nvmet xri abort
1761  * @phba: pointer to lpfc hba data structure.
1762  * @axri: pointer to the nvmet xri abort wcqe structure.
1763  *
1764  * This routine is invoked by the worker thread to process a SLI4 fast-path
1765  * NVMET aborted xri.
1766  **/
1767 void
1768 lpfc_sli4_nvmet_xri_aborted(struct lpfc_hba *phba,
1769                             struct sli4_wcqe_xri_aborted *axri)
1770 {
1771 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
1772         uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
1773         uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
1774         struct lpfc_async_xchg_ctx *ctxp, *next_ctxp;
1775         struct lpfc_nvmet_tgtport *tgtp;
1776         struct nvmefc_tgt_fcp_req *req = NULL;
1777         struct lpfc_nodelist *ndlp;
1778         unsigned long iflag = 0;
1779         int rrq_empty = 0;
1780         bool released = false;
1781
1782         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1783                         "6317 XB aborted xri x%x rxid x%x\n", xri, rxid);
1784
1785         if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_NVME))
1786                 return;
1787
1788         if (phba->targetport) {
1789                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
1790                 atomic_inc(&tgtp->xmt_fcp_xri_abort_cqe);
1791         }
1792
1793         spin_lock_irqsave(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1794         list_for_each_entry_safe(ctxp, next_ctxp,
1795                                  &phba->sli4_hba.lpfc_abts_nvmet_ctx_list,
1796                                  list) {
1797                 if (ctxp->ctxbuf->sglq->sli4_xritag != xri)
1798                         continue;
1799
1800                 spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock,
1801                                        iflag);
1802
1803                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
1804                 /* Check if we already received a free context call
1805                  * and we have completed processing an abort situation.
1806                  */
1807                 if (ctxp->flag & LPFC_NVME_CTX_RLS &&
1808                     !(ctxp->flag & LPFC_NVME_ABORT_OP)) {
1809                         spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1810                         list_del_init(&ctxp->list);
1811                         spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1812                         released = true;
1813                 }
1814                 ctxp->flag &= ~LPFC_NVME_XBUSY;
1815                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1816
1817                 rrq_empty = list_empty(&phba->active_rrq_list);
1818                 ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
1819                 if (ndlp &&
1820                     (ndlp->nlp_state == NLP_STE_UNMAPPED_NODE ||
1821                      ndlp->nlp_state == NLP_STE_MAPPED_NODE)) {
1822                         lpfc_set_rrq_active(phba, ndlp,
1823                                 ctxp->ctxbuf->sglq->sli4_lxritag,
1824                                 rxid, 1);
1825                         lpfc_sli4_abts_err_handler(phba, ndlp, axri);
1826                 }
1827
1828                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1829                                 "6318 XB aborted oxid x%x flg x%x (%x)\n",
1830                                 ctxp->oxid, ctxp->flag, released);
1831                 if (released)
1832                         lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
1833
1834                 if (rrq_empty)
1835                         lpfc_worker_wake_up(phba);
1836                 return;
1837         }
1838         spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1839         ctxp = lpfc_nvmet_get_ctx_for_xri(phba, xri);
1840         if (ctxp) {
1841                 /*
1842                  *  Abort already done by FW, so BA_ACC sent.
1843                  *  However, the transport may be unaware.
1844                  */
1845                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1846                                 "6323 NVMET Rcv ABTS xri x%x ctxp state x%x "
1847                                 "flag x%x oxid x%x rxid x%x\n",
1848                                 xri, ctxp->state, ctxp->flag, ctxp->oxid,
1849                                 rxid);
1850
1851                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
1852                 ctxp->flag |= LPFC_NVME_ABTS_RCV;
1853                 ctxp->state = LPFC_NVME_STE_ABORT;
1854                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1855
1856                 lpfc_nvmeio_data(phba,
1857                                  "NVMET ABTS RCV: xri x%x CPU %02x rjt %d\n",
1858                                  xri, raw_smp_processor_id(), 0);
1859
1860                 req = &ctxp->hdlrctx.fcp_req;
1861                 if (req)
1862                         nvmet_fc_rcv_fcp_abort(phba->targetport, req);
1863         }
1864 #endif
1865 }
1866
1867 int
1868 lpfc_nvmet_rcv_unsol_abort(struct lpfc_vport *vport,
1869                            struct fc_frame_header *fc_hdr)
1870 {
1871 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
1872         struct lpfc_hba *phba = vport->phba;
1873         struct lpfc_async_xchg_ctx *ctxp, *next_ctxp;
1874         struct nvmefc_tgt_fcp_req *rsp;
1875         uint32_t sid;
1876         uint16_t oxid, xri;
1877         unsigned long iflag = 0;
1878
1879         sid = sli4_sid_from_fc_hdr(fc_hdr);
1880         oxid = be16_to_cpu(fc_hdr->fh_ox_id);
1881
1882         spin_lock_irqsave(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1883         list_for_each_entry_safe(ctxp, next_ctxp,
1884                                  &phba->sli4_hba.lpfc_abts_nvmet_ctx_list,
1885                                  list) {
1886                 if (ctxp->oxid != oxid || ctxp->sid != sid)
1887                         continue;
1888
1889                 xri = ctxp->ctxbuf->sglq->sli4_xritag;
1890
1891                 spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock,
1892                                        iflag);
1893                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
1894                 ctxp->flag |= LPFC_NVME_ABTS_RCV;
1895                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1896
1897                 lpfc_nvmeio_data(phba,
1898                         "NVMET ABTS RCV: xri x%x CPU %02x rjt %d\n",
1899                         xri, raw_smp_processor_id(), 0);
1900
1901                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1902                                 "6319 NVMET Rcv ABTS:acc xri x%x\n", xri);
1903
1904                 rsp = &ctxp->hdlrctx.fcp_req;
1905                 nvmet_fc_rcv_fcp_abort(phba->targetport, rsp);
1906
1907                 /* Respond with BA_ACC accordingly */
1908                 lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 1);
1909                 return 0;
1910         }
1911         spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1912         /* check the wait list */
1913         if (phba->sli4_hba.nvmet_io_wait_cnt) {
1914                 struct rqb_dmabuf *nvmebuf;
1915                 struct fc_frame_header *fc_hdr_tmp;
1916                 u32 sid_tmp;
1917                 u16 oxid_tmp;
1918                 bool found = false;
1919
1920                 spin_lock_irqsave(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
1921
1922                 /* match by oxid and s_id */
1923                 list_for_each_entry(nvmebuf,
1924                                     &phba->sli4_hba.lpfc_nvmet_io_wait_list,
1925                                     hbuf.list) {
1926                         fc_hdr_tmp = (struct fc_frame_header *)
1927                                         (nvmebuf->hbuf.virt);
1928                         oxid_tmp = be16_to_cpu(fc_hdr_tmp->fh_ox_id);
1929                         sid_tmp = sli4_sid_from_fc_hdr(fc_hdr_tmp);
1930                         if (oxid_tmp != oxid || sid_tmp != sid)
1931                                 continue;
1932
1933                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1934                                         "6321 NVMET Rcv ABTS oxid x%x from x%x "
1935                                         "is waiting for a ctxp\n",
1936                                         oxid, sid);
1937
1938                         list_del_init(&nvmebuf->hbuf.list);
1939                         phba->sli4_hba.nvmet_io_wait_cnt--;
1940                         found = true;
1941                         break;
1942                 }
1943                 spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock,
1944                                        iflag);
1945
1946                 /* free buffer since already posted a new DMA buffer to RQ */
1947                 if (found) {
1948                         nvmebuf->hrq->rqbp->rqb_free_buffer(phba, nvmebuf);
1949                         /* Respond with BA_ACC accordingly */
1950                         lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 1);
1951                         return 0;
1952                 }
1953         }
1954
1955         /* check active list */
1956         ctxp = lpfc_nvmet_get_ctx_for_oxid(phba, oxid, sid);
1957         if (ctxp) {
1958                 xri = ctxp->ctxbuf->sglq->sli4_xritag;
1959
1960                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
1961                 ctxp->flag |= (LPFC_NVME_ABTS_RCV | LPFC_NVME_ABORT_OP);
1962                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1963
1964                 lpfc_nvmeio_data(phba,
1965                                  "NVMET ABTS RCV: xri x%x CPU %02x rjt %d\n",
1966                                  xri, raw_smp_processor_id(), 0);
1967
1968                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1969                                 "6322 NVMET Rcv ABTS:acc oxid x%x xri x%x "
1970                                 "flag x%x state x%x\n",
1971                                 ctxp->oxid, xri, ctxp->flag, ctxp->state);
1972
1973                 if (ctxp->flag & LPFC_NVME_TNOTIFY) {
1974                         /* Notify the transport */
1975                         nvmet_fc_rcv_fcp_abort(phba->targetport,
1976                                                &ctxp->hdlrctx.fcp_req);
1977                 } else {
1978                         cancel_work_sync(&ctxp->ctxbuf->defer_work);
1979                         spin_lock_irqsave(&ctxp->ctxlock, iflag);
1980                         lpfc_nvmet_defer_release(phba, ctxp);
1981                         spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1982                 }
1983                 lpfc_nvmet_sol_fcp_issue_abort(phba, ctxp, ctxp->sid,
1984                                                ctxp->oxid);
1985
1986                 lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 1);
1987                 return 0;
1988         }
1989
1990         lpfc_nvmeio_data(phba, "NVMET ABTS RCV: oxid x%x CPU %02x rjt %d\n",
1991                          oxid, raw_smp_processor_id(), 1);
1992
1993         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1994                         "6320 NVMET Rcv ABTS:rjt oxid x%x\n", oxid);
1995
1996         /* Respond with BA_RJT accordingly */
1997         lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 0);
1998 #endif
1999         return 0;
2000 }
2001
2002 static void
2003 lpfc_nvmet_wqfull_flush(struct lpfc_hba *phba, struct lpfc_queue *wq,
2004                         struct lpfc_async_xchg_ctx *ctxp)
2005 {
2006         struct lpfc_sli_ring *pring;
2007         struct lpfc_iocbq *nvmewqeq;
2008         struct lpfc_iocbq *next_nvmewqeq;
2009         unsigned long iflags;
2010         struct lpfc_wcqe_complete wcqe;
2011         struct lpfc_wcqe_complete *wcqep;
2012
2013         pring = wq->pring;
2014         wcqep = &wcqe;
2015
2016         /* Fake an ABORT error code back to cmpl routine */
2017         memset(wcqep, 0, sizeof(struct lpfc_wcqe_complete));
2018         bf_set(lpfc_wcqe_c_status, wcqep, IOSTAT_LOCAL_REJECT);
2019         wcqep->parameter = IOERR_ABORT_REQUESTED;
2020
2021         spin_lock_irqsave(&pring->ring_lock, iflags);
2022         list_for_each_entry_safe(nvmewqeq, next_nvmewqeq,
2023                                  &wq->wqfull_list, list) {
2024                 if (ctxp) {
2025                         /* Checking for a specific IO to flush */
2026                         if (nvmewqeq->context2 == ctxp) {
2027                                 list_del(&nvmewqeq->list);
2028                                 spin_unlock_irqrestore(&pring->ring_lock,
2029                                                        iflags);
2030                                 lpfc_nvmet_xmt_fcp_op_cmp(phba, nvmewqeq,
2031                                                           wcqep);
2032                                 return;
2033                         }
2034                         continue;
2035                 } else {
2036                         /* Flush all IOs */
2037                         list_del(&nvmewqeq->list);
2038                         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2039                         lpfc_nvmet_xmt_fcp_op_cmp(phba, nvmewqeq, wcqep);
2040                         spin_lock_irqsave(&pring->ring_lock, iflags);
2041                 }
2042         }
2043         if (!ctxp)
2044                 wq->q_flag &= ~HBA_NVMET_WQFULL;
2045         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2046 }
2047
2048 void
2049 lpfc_nvmet_wqfull_process(struct lpfc_hba *phba,
2050                           struct lpfc_queue *wq)
2051 {
2052 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2053         struct lpfc_sli_ring *pring;
2054         struct lpfc_iocbq *nvmewqeq;
2055         struct lpfc_async_xchg_ctx *ctxp;
2056         unsigned long iflags;
2057         int rc;
2058
2059         /*
2060          * Some WQE slots are available, so try to re-issue anything
2061          * on the WQ wqfull_list.
2062          */
2063         pring = wq->pring;
2064         spin_lock_irqsave(&pring->ring_lock, iflags);
2065         while (!list_empty(&wq->wqfull_list)) {
2066                 list_remove_head(&wq->wqfull_list, nvmewqeq, struct lpfc_iocbq,
2067                                  list);
2068                 spin_unlock_irqrestore(&pring->ring_lock, iflags);
2069                 ctxp = (struct lpfc_async_xchg_ctx *)nvmewqeq->context2;
2070                 rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, nvmewqeq);
2071                 spin_lock_irqsave(&pring->ring_lock, iflags);
2072                 if (rc == -EBUSY) {
2073                         /* WQ was full again, so put it back on the list */
2074                         list_add(&nvmewqeq->list, &wq->wqfull_list);
2075                         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2076                         return;
2077                 }
2078                 if (rc == WQE_SUCCESS) {
2079 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2080                         if (ctxp->ts_cmd_nvme) {
2081                                 if (ctxp->hdlrctx.fcp_req.op == NVMET_FCOP_RSP)
2082                                         ctxp->ts_status_wqput = ktime_get_ns();
2083                                 else
2084                                         ctxp->ts_data_wqput = ktime_get_ns();
2085                         }
2086 #endif
2087                 } else {
2088                         WARN_ON(rc);
2089                 }
2090         }
2091         wq->q_flag &= ~HBA_NVMET_WQFULL;
2092         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2093
2094 #endif
2095 }
2096
2097 void
2098 lpfc_nvmet_destroy_targetport(struct lpfc_hba *phba)
2099 {
2100 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2101         struct lpfc_nvmet_tgtport *tgtp;
2102         struct lpfc_queue *wq;
2103         uint32_t qidx;
2104         DECLARE_COMPLETION_ONSTACK(tport_unreg_cmp);
2105
2106         if (phba->nvmet_support == 0)
2107                 return;
2108         if (phba->targetport) {
2109                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2110                 for (qidx = 0; qidx < phba->cfg_hdw_queue; qidx++) {
2111                         wq = phba->sli4_hba.hdwq[qidx].io_wq;
2112                         lpfc_nvmet_wqfull_flush(phba, wq, NULL);
2113                 }
2114                 tgtp->tport_unreg_cmp = &tport_unreg_cmp;
2115                 nvmet_fc_unregister_targetport(phba->targetport);
2116                 if (!wait_for_completion_timeout(&tport_unreg_cmp,
2117                                         msecs_to_jiffies(LPFC_NVMET_WAIT_TMO)))
2118                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2119                                         "6179 Unreg targetport x%px timeout "
2120                                         "reached.\n", phba->targetport);
2121                 lpfc_nvmet_cleanup_io_context(phba);
2122         }
2123         phba->targetport = NULL;
2124 #endif
2125 }
2126
2127 /**
2128  * lpfc_nvmet_handle_lsreq - Process an NVME LS request
2129  * @phba: pointer to lpfc hba data structure.
2130  * @axchg: pointer to exchange context for the NVME LS request
2131  *
2132  * This routine is used for processing an asychronously received NVME LS
2133  * request. Any remaining validation is done and the LS is then forwarded
2134  * to the nvmet-fc transport via nvmet_fc_rcv_ls_req().
2135  *
2136  * The calling sequence should be: nvmet_fc_rcv_ls_req() -> (processing)
2137  * -> lpfc_nvmet_xmt_ls_rsp/cmp -> req->done.
2138  * lpfc_nvme_xmt_ls_rsp_cmp should free the allocated axchg.
2139  *
2140  * Returns 0 if LS was handled and delivered to the transport
2141  * Returns 1 if LS failed to be handled and should be dropped
2142  */
2143 int
2144 lpfc_nvmet_handle_lsreq(struct lpfc_hba *phba,
2145                         struct lpfc_async_xchg_ctx *axchg)
2146 {
2147 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2148         struct lpfc_nvmet_tgtport *tgtp = phba->targetport->private;
2149         uint32_t *payload = axchg->payload;
2150         int rc;
2151
2152         atomic_inc(&tgtp->rcv_ls_req_in);
2153
2154         /*
2155          * Driver passes the ndlp as the hosthandle argument allowing
2156          * the transport to generate LS requests for any associateions
2157          * that are created.
2158          */
2159         rc = nvmet_fc_rcv_ls_req(phba->targetport, axchg->ndlp, &axchg->ls_rsp,
2160                                  axchg->payload, axchg->size);
2161
2162         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
2163                         "6037 NVMET Unsol rcv: sz %d rc %d: %08x %08x %08x "
2164                         "%08x %08x %08x\n", axchg->size, rc,
2165                         *payload, *(payload+1), *(payload+2),
2166                         *(payload+3), *(payload+4), *(payload+5));
2167
2168         if (!rc) {
2169                 atomic_inc(&tgtp->rcv_ls_req_out);
2170                 return 0;
2171         }
2172
2173         atomic_inc(&tgtp->rcv_ls_req_drop);
2174 #endif
2175         return 1;
2176 }
2177
2178 static void
2179 lpfc_nvmet_process_rcv_fcp_req(struct lpfc_nvmet_ctxbuf *ctx_buf)
2180 {
2181 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2182         struct lpfc_async_xchg_ctx *ctxp = ctx_buf->context;
2183         struct lpfc_hba *phba = ctxp->phba;
2184         struct rqb_dmabuf *nvmebuf = ctxp->rqb_buffer;
2185         struct lpfc_nvmet_tgtport *tgtp;
2186         uint32_t *payload, qno;
2187         uint32_t rc;
2188         unsigned long iflags;
2189
2190         if (!nvmebuf) {
2191                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2192                         "6159 process_rcv_fcp_req, nvmebuf is NULL, "
2193                         "oxid: x%x flg: x%x state: x%x\n",
2194                         ctxp->oxid, ctxp->flag, ctxp->state);
2195                 spin_lock_irqsave(&ctxp->ctxlock, iflags);
2196                 lpfc_nvmet_defer_release(phba, ctxp);
2197                 spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2198                 lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid,
2199                                                  ctxp->oxid);
2200                 return;
2201         }
2202
2203         if (ctxp->flag & LPFC_NVME_ABTS_RCV) {
2204                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2205                                 "6324 IO oxid x%x aborted\n",
2206                                 ctxp->oxid);
2207                 return;
2208         }
2209
2210         payload = (uint32_t *)(nvmebuf->dbuf.virt);
2211         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2212         ctxp->flag |= LPFC_NVME_TNOTIFY;
2213 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2214         if (ctxp->ts_isr_cmd)
2215                 ctxp->ts_cmd_nvme = ktime_get_ns();
2216 #endif
2217         /*
2218          * The calling sequence should be:
2219          * nvmet_fc_rcv_fcp_req->lpfc_nvmet_xmt_fcp_op/cmp- req->done
2220          * lpfc_nvmet_xmt_fcp_op_cmp should free the allocated ctxp.
2221          * When we return from nvmet_fc_rcv_fcp_req, all relevant info
2222          * the NVME command / FC header is stored.
2223          * A buffer has already been reposted for this IO, so just free
2224          * the nvmebuf.
2225          */
2226         rc = nvmet_fc_rcv_fcp_req(phba->targetport, &ctxp->hdlrctx.fcp_req,
2227                                   payload, ctxp->size);
2228         /* Process FCP command */
2229         if (rc == 0) {
2230                 atomic_inc(&tgtp->rcv_fcp_cmd_out);
2231                 spin_lock_irqsave(&ctxp->ctxlock, iflags);
2232                 if ((ctxp->flag & LPFC_NVME_CTX_REUSE_WQ) ||
2233                     (nvmebuf != ctxp->rqb_buffer)) {
2234                         spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2235                         return;
2236                 }
2237                 ctxp->rqb_buffer = NULL;
2238                 spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2239                 lpfc_rq_buf_free(phba, &nvmebuf->hbuf); /* repost */
2240                 return;
2241         }
2242
2243         /* Processing of FCP command is deferred */
2244         if (rc == -EOVERFLOW) {
2245                 lpfc_nvmeio_data(phba, "NVMET RCV BUSY: xri x%x sz %d "
2246                                  "from %06x\n",
2247                                  ctxp->oxid, ctxp->size, ctxp->sid);
2248                 atomic_inc(&tgtp->rcv_fcp_cmd_out);
2249                 atomic_inc(&tgtp->defer_fod);
2250                 spin_lock_irqsave(&ctxp->ctxlock, iflags);
2251                 if (ctxp->flag & LPFC_NVME_CTX_REUSE_WQ) {
2252                         spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2253                         return;
2254                 }
2255                 spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2256                 /*
2257                  * Post a replacement DMA buffer to RQ and defer
2258                  * freeing rcv buffer till .defer_rcv callback
2259                  */
2260                 qno = nvmebuf->idx;
2261                 lpfc_post_rq_buffer(
2262                         phba, phba->sli4_hba.nvmet_mrq_hdr[qno],
2263                         phba->sli4_hba.nvmet_mrq_data[qno], 1, qno);
2264                 return;
2265         }
2266         ctxp->flag &= ~LPFC_NVME_TNOTIFY;
2267         atomic_inc(&tgtp->rcv_fcp_cmd_drop);
2268         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2269                         "2582 FCP Drop IO x%x: err x%x: x%x x%x x%x\n",
2270                         ctxp->oxid, rc,
2271                         atomic_read(&tgtp->rcv_fcp_cmd_in),
2272                         atomic_read(&tgtp->rcv_fcp_cmd_out),
2273                         atomic_read(&tgtp->xmt_fcp_release));
2274         lpfc_nvmeio_data(phba, "NVMET FCP DROP: xri x%x sz %d from %06x\n",
2275                          ctxp->oxid, ctxp->size, ctxp->sid);
2276         spin_lock_irqsave(&ctxp->ctxlock, iflags);
2277         lpfc_nvmet_defer_release(phba, ctxp);
2278         spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2279         lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid, ctxp->oxid);
2280 #endif
2281 }
2282
2283 static void
2284 lpfc_nvmet_fcp_rqst_defer_work(struct work_struct *work)
2285 {
2286 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2287         struct lpfc_nvmet_ctxbuf *ctx_buf =
2288                 container_of(work, struct lpfc_nvmet_ctxbuf, defer_work);
2289
2290         lpfc_nvmet_process_rcv_fcp_req(ctx_buf);
2291 #endif
2292 }
2293
2294 static struct lpfc_nvmet_ctxbuf *
2295 lpfc_nvmet_replenish_context(struct lpfc_hba *phba,
2296                              struct lpfc_nvmet_ctx_info *current_infop)
2297 {
2298 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2299         struct lpfc_nvmet_ctxbuf *ctx_buf = NULL;
2300         struct lpfc_nvmet_ctx_info *get_infop;
2301         int i;
2302
2303         /*
2304          * The current_infop for the MRQ a NVME command IU was received
2305          * on is empty. Our goal is to replenish this MRQs context
2306          * list from a another CPUs.
2307          *
2308          * First we need to pick a context list to start looking on.
2309          * nvmet_ctx_start_cpu has available context the last time
2310          * we needed to replenish this CPU where nvmet_ctx_next_cpu
2311          * is just the next sequential CPU for this MRQ.
2312          */
2313         if (current_infop->nvmet_ctx_start_cpu)
2314                 get_infop = current_infop->nvmet_ctx_start_cpu;
2315         else
2316                 get_infop = current_infop->nvmet_ctx_next_cpu;
2317
2318         for (i = 0; i < phba->sli4_hba.num_possible_cpu; i++) {
2319                 if (get_infop == current_infop) {
2320                         get_infop = get_infop->nvmet_ctx_next_cpu;
2321                         continue;
2322                 }
2323                 spin_lock(&get_infop->nvmet_ctx_list_lock);
2324
2325                 /* Just take the entire context list, if there are any */
2326                 if (get_infop->nvmet_ctx_list_cnt) {
2327                         list_splice_init(&get_infop->nvmet_ctx_list,
2328                                     &current_infop->nvmet_ctx_list);
2329                         current_infop->nvmet_ctx_list_cnt =
2330                                 get_infop->nvmet_ctx_list_cnt - 1;
2331                         get_infop->nvmet_ctx_list_cnt = 0;
2332                         spin_unlock(&get_infop->nvmet_ctx_list_lock);
2333
2334                         current_infop->nvmet_ctx_start_cpu = get_infop;
2335                         list_remove_head(&current_infop->nvmet_ctx_list,
2336                                          ctx_buf, struct lpfc_nvmet_ctxbuf,
2337                                          list);
2338                         return ctx_buf;
2339                 }
2340
2341                 /* Otherwise, move on to the next CPU for this MRQ */
2342                 spin_unlock(&get_infop->nvmet_ctx_list_lock);
2343                 get_infop = get_infop->nvmet_ctx_next_cpu;
2344         }
2345
2346 #endif
2347         /* Nothing found, all contexts for the MRQ are in-flight */
2348         return NULL;
2349 }
2350
2351 /**
2352  * lpfc_nvmet_unsol_fcp_buffer - Process an unsolicited event data buffer
2353  * @phba: pointer to lpfc hba data structure.
2354  * @idx: relative index of MRQ vector
2355  * @nvmebuf: pointer to lpfc nvme command HBQ data structure.
2356  * @isr_timestamp: in jiffies.
2357  * @cqflag: cq processing information regarding workload.
2358  *
2359  * This routine is used for processing the WQE associated with a unsolicited
2360  * event. It first determines whether there is an existing ndlp that matches
2361  * the DID from the unsolicited WQE. If not, it will create a new one with
2362  * the DID from the unsolicited WQE. The ELS command from the unsolicited
2363  * WQE is then used to invoke the proper routine and to set up proper state
2364  * of the discovery state machine.
2365  **/
2366 static void
2367 lpfc_nvmet_unsol_fcp_buffer(struct lpfc_hba *phba,
2368                             uint32_t idx,
2369                             struct rqb_dmabuf *nvmebuf,
2370                             uint64_t isr_timestamp,
2371                             uint8_t cqflag)
2372 {
2373         struct lpfc_async_xchg_ctx *ctxp;
2374         struct lpfc_nvmet_tgtport *tgtp;
2375         struct fc_frame_header *fc_hdr;
2376         struct lpfc_nvmet_ctxbuf *ctx_buf;
2377         struct lpfc_nvmet_ctx_info *current_infop;
2378         uint32_t size, oxid, sid, qno;
2379         unsigned long iflag;
2380         int current_cpu;
2381
2382         if (!IS_ENABLED(CONFIG_NVME_TARGET_FC))
2383                 return;
2384
2385         ctx_buf = NULL;
2386         if (!nvmebuf || !phba->targetport) {
2387                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2388                                 "6157 NVMET FCP Drop IO\n");
2389                 if (nvmebuf)
2390                         lpfc_rq_buf_free(phba, &nvmebuf->hbuf);
2391                 return;
2392         }
2393
2394         /*
2395          * Get a pointer to the context list for this MRQ based on
2396          * the CPU this MRQ IRQ is associated with. If the CPU association
2397          * changes from our initial assumption, the context list could
2398          * be empty, thus it would need to be replenished with the
2399          * context list from another CPU for this MRQ.
2400          */
2401         current_cpu = raw_smp_processor_id();
2402         current_infop = lpfc_get_ctx_list(phba, current_cpu, idx);
2403         spin_lock_irqsave(&current_infop->nvmet_ctx_list_lock, iflag);
2404         if (current_infop->nvmet_ctx_list_cnt) {
2405                 list_remove_head(&current_infop->nvmet_ctx_list,
2406                                  ctx_buf, struct lpfc_nvmet_ctxbuf, list);
2407                 current_infop->nvmet_ctx_list_cnt--;
2408         } else {
2409                 ctx_buf = lpfc_nvmet_replenish_context(phba, current_infop);
2410         }
2411         spin_unlock_irqrestore(&current_infop->nvmet_ctx_list_lock, iflag);
2412
2413         fc_hdr = (struct fc_frame_header *)(nvmebuf->hbuf.virt);
2414         oxid = be16_to_cpu(fc_hdr->fh_ox_id);
2415         size = nvmebuf->bytes_recv;
2416
2417 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2418         if (phba->hdwqstat_on & LPFC_CHECK_NVMET_IO) {
2419                 this_cpu_inc(phba->sli4_hba.c_stat->rcv_io);
2420                 if (idx != current_cpu)
2421                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
2422                                         "6703 CPU Check rcv: "
2423                                         "cpu %d expect %d\n",
2424                                         current_cpu, idx);
2425         }
2426 #endif
2427
2428         lpfc_nvmeio_data(phba, "NVMET FCP  RCV: xri x%x sz %d CPU %02x\n",
2429                          oxid, size, raw_smp_processor_id());
2430
2431         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2432
2433         if (!ctx_buf) {
2434                 /* Queue this NVME IO to process later */
2435                 spin_lock_irqsave(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
2436                 list_add_tail(&nvmebuf->hbuf.list,
2437                               &phba->sli4_hba.lpfc_nvmet_io_wait_list);
2438                 phba->sli4_hba.nvmet_io_wait_cnt++;
2439                 phba->sli4_hba.nvmet_io_wait_total++;
2440                 spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock,
2441                                        iflag);
2442
2443                 /* Post a brand new DMA buffer to RQ */
2444                 qno = nvmebuf->idx;
2445                 lpfc_post_rq_buffer(
2446                         phba, phba->sli4_hba.nvmet_mrq_hdr[qno],
2447                         phba->sli4_hba.nvmet_mrq_data[qno], 1, qno);
2448
2449                 atomic_inc(&tgtp->defer_ctx);
2450                 return;
2451         }
2452
2453         sid = sli4_sid_from_fc_hdr(fc_hdr);
2454
2455         ctxp = (struct lpfc_async_xchg_ctx *)ctx_buf->context;
2456         spin_lock_irqsave(&phba->sli4_hba.t_active_list_lock, iflag);
2457         list_add_tail(&ctxp->list, &phba->sli4_hba.t_active_ctx_list);
2458         spin_unlock_irqrestore(&phba->sli4_hba.t_active_list_lock, iflag);
2459         if (ctxp->state != LPFC_NVME_STE_FREE) {
2460                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2461                                 "6414 NVMET Context corrupt %d %d oxid x%x\n",
2462                                 ctxp->state, ctxp->entry_cnt, ctxp->oxid);
2463         }
2464         ctxp->wqeq = NULL;
2465         ctxp->offset = 0;
2466         ctxp->phba = phba;
2467         ctxp->size = size;
2468         ctxp->oxid = oxid;
2469         ctxp->sid = sid;
2470         ctxp->idx = idx;
2471         ctxp->state = LPFC_NVME_STE_RCV;
2472         ctxp->entry_cnt = 1;
2473         ctxp->flag = 0;
2474         ctxp->ctxbuf = ctx_buf;
2475         ctxp->rqb_buffer = (void *)nvmebuf;
2476         ctxp->hdwq = NULL;
2477         spin_lock_init(&ctxp->ctxlock);
2478
2479 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2480         if (isr_timestamp)
2481                 ctxp->ts_isr_cmd = isr_timestamp;
2482         ctxp->ts_cmd_nvme = 0;
2483         ctxp->ts_nvme_data = 0;
2484         ctxp->ts_data_wqput = 0;
2485         ctxp->ts_isr_data = 0;
2486         ctxp->ts_data_nvme = 0;
2487         ctxp->ts_nvme_status = 0;
2488         ctxp->ts_status_wqput = 0;
2489         ctxp->ts_isr_status = 0;
2490         ctxp->ts_status_nvme = 0;
2491 #endif
2492
2493         atomic_inc(&tgtp->rcv_fcp_cmd_in);
2494         /* check for cq processing load */
2495         if (!cqflag) {
2496                 lpfc_nvmet_process_rcv_fcp_req(ctx_buf);
2497                 return;
2498         }
2499
2500         if (!queue_work(phba->wq, &ctx_buf->defer_work)) {
2501                 atomic_inc(&tgtp->rcv_fcp_cmd_drop);
2502                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2503                                 "6325 Unable to queue work for oxid x%x. "
2504                                 "FCP Drop IO [x%x x%x x%x]\n",
2505                                 ctxp->oxid,
2506                                 atomic_read(&tgtp->rcv_fcp_cmd_in),
2507                                 atomic_read(&tgtp->rcv_fcp_cmd_out),
2508                                 atomic_read(&tgtp->xmt_fcp_release));
2509
2510                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
2511                 lpfc_nvmet_defer_release(phba, ctxp);
2512                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
2513                 lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, sid, oxid);
2514         }
2515 }
2516
2517 /**
2518  * lpfc_nvmet_unsol_fcp_event - Process an unsolicited event from an nvme nport
2519  * @phba: pointer to lpfc hba data structure.
2520  * @idx: relative index of MRQ vector
2521  * @nvmebuf: pointer to received nvme data structure.
2522  * @isr_timestamp: in jiffies.
2523  * @cqflag: cq processing information regarding workload.
2524  *
2525  * This routine is used to process an unsolicited event received from a SLI
2526  * (Service Level Interface) ring. The actual processing of the data buffer
2527  * associated with the unsolicited event is done by invoking the routine
2528  * lpfc_nvmet_unsol_fcp_buffer() after properly set up the buffer from the
2529  * SLI RQ on which the unsolicited event was received.
2530  **/
2531 void
2532 lpfc_nvmet_unsol_fcp_event(struct lpfc_hba *phba,
2533                            uint32_t idx,
2534                            struct rqb_dmabuf *nvmebuf,
2535                            uint64_t isr_timestamp,
2536                            uint8_t cqflag)
2537 {
2538         if (!nvmebuf) {
2539                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2540                                 "3167 NVMET FCP Drop IO\n");
2541                 return;
2542         }
2543         if (phba->nvmet_support == 0) {
2544                 lpfc_rq_buf_free(phba, &nvmebuf->hbuf);
2545                 return;
2546         }
2547         lpfc_nvmet_unsol_fcp_buffer(phba, idx, nvmebuf, isr_timestamp, cqflag);
2548 }
2549
2550 /**
2551  * lpfc_nvmet_prep_ls_wqe - Allocate and prepare a lpfc wqe data structure
2552  * @phba: pointer to a host N_Port data structure.
2553  * @ctxp: Context info for NVME LS Request
2554  * @rspbuf: DMA buffer of NVME command.
2555  * @rspsize: size of the NVME command.
2556  *
2557  * This routine is used for allocating a lpfc-WQE data structure from
2558  * the driver lpfc-WQE free-list and prepare the WQE with the parameters
2559  * passed into the routine for discovery state machine to issue an Extended
2560  * Link Service (NVME) commands. It is a generic lpfc-WQE allocation
2561  * and preparation routine that is used by all the discovery state machine
2562  * routines and the NVME command-specific fields will be later set up by
2563  * the individual discovery machine routines after calling this routine
2564  * allocating and preparing a generic WQE data structure. It fills in the
2565  * Buffer Descriptor Entries (BDEs), allocates buffers for both command
2566  * payload and response payload (if expected). The reference count on the
2567  * ndlp is incremented by 1 and the reference to the ndlp is put into
2568  * context1 of the WQE data structure for this WQE to hold the ndlp
2569  * reference for the command's callback function to access later.
2570  *
2571  * Return code
2572  *   Pointer to the newly allocated/prepared nvme wqe data structure
2573  *   NULL - when nvme wqe data structure allocation/preparation failed
2574  **/
2575 static struct lpfc_iocbq *
2576 lpfc_nvmet_prep_ls_wqe(struct lpfc_hba *phba,
2577                        struct lpfc_async_xchg_ctx *ctxp,
2578                        dma_addr_t rspbuf, uint16_t rspsize)
2579 {
2580         struct lpfc_nodelist *ndlp;
2581         struct lpfc_iocbq *nvmewqe;
2582         union lpfc_wqe128 *wqe;
2583
2584         if (!lpfc_is_link_up(phba)) {
2585                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2586                                 "6104 NVMET prep LS wqe: link err: "
2587                                 "NPORT x%x oxid:x%x ste %d\n",
2588                                 ctxp->sid, ctxp->oxid, ctxp->state);
2589                 return NULL;
2590         }
2591
2592         /* Allocate buffer for  command wqe */
2593         nvmewqe = lpfc_sli_get_iocbq(phba);
2594         if (nvmewqe == NULL) {
2595                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2596                                 "6105 NVMET prep LS wqe: No WQE: "
2597                                 "NPORT x%x oxid x%x ste %d\n",
2598                                 ctxp->sid, ctxp->oxid, ctxp->state);
2599                 return NULL;
2600         }
2601
2602         ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
2603         if (!ndlp ||
2604             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
2605             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
2606                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2607                                 "6106 NVMET prep LS wqe: No ndlp: "
2608                                 "NPORT x%x oxid x%x ste %d\n",
2609                                 ctxp->sid, ctxp->oxid, ctxp->state);
2610                 goto nvme_wqe_free_wqeq_exit;
2611         }
2612         ctxp->wqeq = nvmewqe;
2613
2614         /* prevent preparing wqe with NULL ndlp reference */
2615         nvmewqe->context1 = lpfc_nlp_get(ndlp);
2616         if (nvmewqe->context1 == NULL)
2617                 goto nvme_wqe_free_wqeq_exit;
2618         nvmewqe->context2 = ctxp;
2619
2620         wqe = &nvmewqe->wqe;
2621         memset(wqe, 0, sizeof(union lpfc_wqe));
2622
2623         /* Words 0 - 2 */
2624         wqe->xmit_sequence.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2625         wqe->xmit_sequence.bde.tus.f.bdeSize = rspsize;
2626         wqe->xmit_sequence.bde.addrLow = le32_to_cpu(putPaddrLow(rspbuf));
2627         wqe->xmit_sequence.bde.addrHigh = le32_to_cpu(putPaddrHigh(rspbuf));
2628
2629         /* Word 3 */
2630
2631         /* Word 4 */
2632
2633         /* Word 5 */
2634         bf_set(wqe_dfctl, &wqe->xmit_sequence.wge_ctl, 0);
2635         bf_set(wqe_ls, &wqe->xmit_sequence.wge_ctl, 1);
2636         bf_set(wqe_la, &wqe->xmit_sequence.wge_ctl, 0);
2637         bf_set(wqe_rctl, &wqe->xmit_sequence.wge_ctl, FC_RCTL_ELS4_REP);
2638         bf_set(wqe_type, &wqe->xmit_sequence.wge_ctl, FC_TYPE_NVME);
2639
2640         /* Word 6 */
2641         bf_set(wqe_ctxt_tag, &wqe->xmit_sequence.wqe_com,
2642                phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2643         bf_set(wqe_xri_tag, &wqe->xmit_sequence.wqe_com, nvmewqe->sli4_xritag);
2644
2645         /* Word 7 */
2646         bf_set(wqe_cmnd, &wqe->xmit_sequence.wqe_com,
2647                CMD_XMIT_SEQUENCE64_WQE);
2648         bf_set(wqe_ct, &wqe->xmit_sequence.wqe_com, SLI4_CT_RPI);
2649         bf_set(wqe_class, &wqe->xmit_sequence.wqe_com, CLASS3);
2650         bf_set(wqe_pu, &wqe->xmit_sequence.wqe_com, 0);
2651
2652         /* Word 8 */
2653         wqe->xmit_sequence.wqe_com.abort_tag = nvmewqe->iotag;
2654
2655         /* Word 9 */
2656         bf_set(wqe_reqtag, &wqe->xmit_sequence.wqe_com, nvmewqe->iotag);
2657         /* Needs to be set by caller */
2658         bf_set(wqe_rcvoxid, &wqe->xmit_sequence.wqe_com, ctxp->oxid);
2659
2660         /* Word 10 */
2661         bf_set(wqe_dbde, &wqe->xmit_sequence.wqe_com, 1);
2662         bf_set(wqe_iod, &wqe->xmit_sequence.wqe_com, LPFC_WQE_IOD_WRITE);
2663         bf_set(wqe_lenloc, &wqe->xmit_sequence.wqe_com,
2664                LPFC_WQE_LENLOC_WORD12);
2665         bf_set(wqe_ebde_cnt, &wqe->xmit_sequence.wqe_com, 0);
2666
2667         /* Word 11 */
2668         bf_set(wqe_cqid, &wqe->xmit_sequence.wqe_com,
2669                LPFC_WQE_CQ_ID_DEFAULT);
2670         bf_set(wqe_cmd_type, &wqe->xmit_sequence.wqe_com,
2671                OTHER_COMMAND);
2672
2673         /* Word 12 */
2674         wqe->xmit_sequence.xmit_len = rspsize;
2675
2676         nvmewqe->retry = 1;
2677         nvmewqe->vport = phba->pport;
2678         nvmewqe->drvrTimeout = (phba->fc_ratov * 3) + LPFC_DRVR_TIMEOUT;
2679         nvmewqe->iocb_flag |= LPFC_IO_NVME_LS;
2680
2681         /* Xmit NVMET response to remote NPORT <did> */
2682         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
2683                         "6039 Xmit NVMET LS response to remote "
2684                         "NPORT x%x iotag:x%x oxid:x%x size:x%x\n",
2685                         ndlp->nlp_DID, nvmewqe->iotag, ctxp->oxid,
2686                         rspsize);
2687         return nvmewqe;
2688
2689 nvme_wqe_free_wqeq_exit:
2690         nvmewqe->context2 = NULL;
2691         nvmewqe->context3 = NULL;
2692         lpfc_sli_release_iocbq(phba, nvmewqe);
2693         return NULL;
2694 }
2695
2696
2697 static struct lpfc_iocbq *
2698 lpfc_nvmet_prep_fcp_wqe(struct lpfc_hba *phba,
2699                         struct lpfc_async_xchg_ctx *ctxp)
2700 {
2701         struct nvmefc_tgt_fcp_req *rsp = &ctxp->hdlrctx.fcp_req;
2702         struct lpfc_nvmet_tgtport *tgtp;
2703         struct sli4_sge *sgl;
2704         struct lpfc_nodelist *ndlp;
2705         struct lpfc_iocbq *nvmewqe;
2706         struct scatterlist *sgel;
2707         union lpfc_wqe128 *wqe;
2708         struct ulp_bde64 *bde;
2709         dma_addr_t physaddr;
2710         int i, cnt, nsegs;
2711         int do_pbde;
2712         int xc = 1;
2713
2714         if (!lpfc_is_link_up(phba)) {
2715                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2716                                 "6107 NVMET prep FCP wqe: link err:"
2717                                 "NPORT x%x oxid x%x ste %d\n",
2718                                 ctxp->sid, ctxp->oxid, ctxp->state);
2719                 return NULL;
2720         }
2721
2722         ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
2723         if (!ndlp ||
2724             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
2725              (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
2726                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2727                                 "6108 NVMET prep FCP wqe: no ndlp: "
2728                                 "NPORT x%x oxid x%x ste %d\n",
2729                                 ctxp->sid, ctxp->oxid, ctxp->state);
2730                 return NULL;
2731         }
2732
2733         if (rsp->sg_cnt > lpfc_tgttemplate.max_sgl_segments) {
2734                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2735                                 "6109 NVMET prep FCP wqe: seg cnt err: "
2736                                 "NPORT x%x oxid x%x ste %d cnt %d\n",
2737                                 ctxp->sid, ctxp->oxid, ctxp->state,
2738                                 phba->cfg_nvme_seg_cnt);
2739                 return NULL;
2740         }
2741         nsegs = rsp->sg_cnt;
2742
2743         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2744         nvmewqe = ctxp->wqeq;
2745         if (nvmewqe == NULL) {
2746                 /* Allocate buffer for  command wqe */
2747                 nvmewqe = ctxp->ctxbuf->iocbq;
2748                 if (nvmewqe == NULL) {
2749                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2750                                         "6110 NVMET prep FCP wqe: No "
2751                                         "WQE: NPORT x%x oxid x%x ste %d\n",
2752                                         ctxp->sid, ctxp->oxid, ctxp->state);
2753                         return NULL;
2754                 }
2755                 ctxp->wqeq = nvmewqe;
2756                 xc = 0; /* create new XRI */
2757                 nvmewqe->sli4_lxritag = NO_XRI;
2758                 nvmewqe->sli4_xritag = NO_XRI;
2759         }
2760
2761         /* Sanity check */
2762         if (((ctxp->state == LPFC_NVME_STE_RCV) &&
2763             (ctxp->entry_cnt == 1)) ||
2764             (ctxp->state == LPFC_NVME_STE_DATA)) {
2765                 wqe = &nvmewqe->wqe;
2766         } else {
2767                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2768                                 "6111 Wrong state NVMET FCP: %d  cnt %d\n",
2769                                 ctxp->state, ctxp->entry_cnt);
2770                 return NULL;
2771         }
2772
2773         sgl  = (struct sli4_sge *)ctxp->ctxbuf->sglq->sgl;
2774         switch (rsp->op) {
2775         case NVMET_FCOP_READDATA:
2776         case NVMET_FCOP_READDATA_RSP:
2777                 /* From the tsend template, initialize words 7 - 11 */
2778                 memcpy(&wqe->words[7],
2779                        &lpfc_tsend_cmd_template.words[7],
2780                        sizeof(uint32_t) * 5);
2781
2782                 /* Words 0 - 2 : The first sg segment */
2783                 sgel = &rsp->sg[0];
2784                 physaddr = sg_dma_address(sgel);
2785                 wqe->fcp_tsend.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2786                 wqe->fcp_tsend.bde.tus.f.bdeSize = sg_dma_len(sgel);
2787                 wqe->fcp_tsend.bde.addrLow = cpu_to_le32(putPaddrLow(physaddr));
2788                 wqe->fcp_tsend.bde.addrHigh =
2789                         cpu_to_le32(putPaddrHigh(physaddr));
2790
2791                 /* Word 3 */
2792                 wqe->fcp_tsend.payload_offset_len = 0;
2793
2794                 /* Word 4 */
2795                 wqe->fcp_tsend.relative_offset = ctxp->offset;
2796
2797                 /* Word 5 */
2798                 wqe->fcp_tsend.reserved = 0;
2799
2800                 /* Word 6 */
2801                 bf_set(wqe_ctxt_tag, &wqe->fcp_tsend.wqe_com,
2802                        phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2803                 bf_set(wqe_xri_tag, &wqe->fcp_tsend.wqe_com,
2804                        nvmewqe->sli4_xritag);
2805
2806                 /* Word 7 - set ar later */
2807
2808                 /* Word 8 */
2809                 wqe->fcp_tsend.wqe_com.abort_tag = nvmewqe->iotag;
2810
2811                 /* Word 9 */
2812                 bf_set(wqe_reqtag, &wqe->fcp_tsend.wqe_com, nvmewqe->iotag);
2813                 bf_set(wqe_rcvoxid, &wqe->fcp_tsend.wqe_com, ctxp->oxid);
2814
2815                 /* Word 10 - set wqes later, in template xc=1 */
2816                 if (!xc)
2817                         bf_set(wqe_xc, &wqe->fcp_tsend.wqe_com, 0);
2818
2819                 /* Word 11 - set sup, irsp, irsplen later */
2820                 do_pbde = 0;
2821
2822                 /* Word 12 */
2823                 wqe->fcp_tsend.fcp_data_len = rsp->transfer_length;
2824
2825                 /* Setup 2 SKIP SGEs */
2826                 sgl->addr_hi = 0;
2827                 sgl->addr_lo = 0;
2828                 sgl->word2 = 0;
2829                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2830                 sgl->word2 = cpu_to_le32(sgl->word2);
2831                 sgl->sge_len = 0;
2832                 sgl++;
2833                 sgl->addr_hi = 0;
2834                 sgl->addr_lo = 0;
2835                 sgl->word2 = 0;
2836                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2837                 sgl->word2 = cpu_to_le32(sgl->word2);
2838                 sgl->sge_len = 0;
2839                 sgl++;
2840                 if (rsp->op == NVMET_FCOP_READDATA_RSP) {
2841                         atomic_inc(&tgtp->xmt_fcp_read_rsp);
2842
2843                         /* In template ar=1 wqes=0 sup=0 irsp=0 irsplen=0 */
2844
2845                         if (rsp->rsplen == LPFC_NVMET_SUCCESS_LEN) {
2846                                 if (ndlp->nlp_flag & NLP_SUPPRESS_RSP)
2847                                         bf_set(wqe_sup,
2848                                                &wqe->fcp_tsend.wqe_com, 1);
2849                         } else {
2850                                 bf_set(wqe_wqes, &wqe->fcp_tsend.wqe_com, 1);
2851                                 bf_set(wqe_irsp, &wqe->fcp_tsend.wqe_com, 1);
2852                                 bf_set(wqe_irsplen, &wqe->fcp_tsend.wqe_com,
2853                                        ((rsp->rsplen >> 2) - 1));
2854                                 memcpy(&wqe->words[16], rsp->rspaddr,
2855                                        rsp->rsplen);
2856                         }
2857                 } else {
2858                         atomic_inc(&tgtp->xmt_fcp_read);
2859
2860                         /* In template ar=1 wqes=0 sup=0 irsp=0 irsplen=0 */
2861                         bf_set(wqe_ar, &wqe->fcp_tsend.wqe_com, 0);
2862                 }
2863                 break;
2864
2865         case NVMET_FCOP_WRITEDATA:
2866                 /* From the treceive template, initialize words 3 - 11 */
2867                 memcpy(&wqe->words[3],
2868                        &lpfc_treceive_cmd_template.words[3],
2869                        sizeof(uint32_t) * 9);
2870
2871                 /* Words 0 - 2 : First SGE is skipped, set invalid BDE type */
2872                 wqe->fcp_treceive.bde.tus.f.bdeFlags = LPFC_SGE_TYPE_SKIP;
2873                 wqe->fcp_treceive.bde.tus.f.bdeSize = 0;
2874                 wqe->fcp_treceive.bde.addrLow = 0;
2875                 wqe->fcp_treceive.bde.addrHigh = 0;
2876
2877                 /* Word 4 */
2878                 wqe->fcp_treceive.relative_offset = ctxp->offset;
2879
2880                 /* Word 6 */
2881                 bf_set(wqe_ctxt_tag, &wqe->fcp_treceive.wqe_com,
2882                        phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2883                 bf_set(wqe_xri_tag, &wqe->fcp_treceive.wqe_com,
2884                        nvmewqe->sli4_xritag);
2885
2886                 /* Word 7 */
2887
2888                 /* Word 8 */
2889                 wqe->fcp_treceive.wqe_com.abort_tag = nvmewqe->iotag;
2890
2891                 /* Word 9 */
2892                 bf_set(wqe_reqtag, &wqe->fcp_treceive.wqe_com, nvmewqe->iotag);
2893                 bf_set(wqe_rcvoxid, &wqe->fcp_treceive.wqe_com, ctxp->oxid);
2894
2895                 /* Word 10 - in template xc=1 */
2896                 if (!xc)
2897                         bf_set(wqe_xc, &wqe->fcp_treceive.wqe_com, 0);
2898
2899                 /* Word 11 - set pbde later */
2900                 if (phba->cfg_enable_pbde) {
2901                         do_pbde = 1;
2902                 } else {
2903                         bf_set(wqe_pbde, &wqe->fcp_treceive.wqe_com, 0);
2904                         do_pbde = 0;
2905                 }
2906
2907                 /* Word 12 */
2908                 wqe->fcp_tsend.fcp_data_len = rsp->transfer_length;
2909
2910                 /* Setup 2 SKIP SGEs */
2911                 sgl->addr_hi = 0;
2912                 sgl->addr_lo = 0;
2913                 sgl->word2 = 0;
2914                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2915                 sgl->word2 = cpu_to_le32(sgl->word2);
2916                 sgl->sge_len = 0;
2917                 sgl++;
2918                 sgl->addr_hi = 0;
2919                 sgl->addr_lo = 0;
2920                 sgl->word2 = 0;
2921                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2922                 sgl->word2 = cpu_to_le32(sgl->word2);
2923                 sgl->sge_len = 0;
2924                 sgl++;
2925                 atomic_inc(&tgtp->xmt_fcp_write);
2926                 break;
2927
2928         case NVMET_FCOP_RSP:
2929                 /* From the treceive template, initialize words 4 - 11 */
2930                 memcpy(&wqe->words[4],
2931                        &lpfc_trsp_cmd_template.words[4],
2932                        sizeof(uint32_t) * 8);
2933
2934                 /* Words 0 - 2 */
2935                 physaddr = rsp->rspdma;
2936                 wqe->fcp_trsp.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2937                 wqe->fcp_trsp.bde.tus.f.bdeSize = rsp->rsplen;
2938                 wqe->fcp_trsp.bde.addrLow =
2939                         cpu_to_le32(putPaddrLow(physaddr));
2940                 wqe->fcp_trsp.bde.addrHigh =
2941                         cpu_to_le32(putPaddrHigh(physaddr));
2942
2943                 /* Word 3 */
2944                 wqe->fcp_trsp.response_len = rsp->rsplen;
2945
2946                 /* Word 6 */
2947                 bf_set(wqe_ctxt_tag, &wqe->fcp_trsp.wqe_com,
2948                        phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2949                 bf_set(wqe_xri_tag, &wqe->fcp_trsp.wqe_com,
2950                        nvmewqe->sli4_xritag);
2951
2952                 /* Word 7 */
2953
2954                 /* Word 8 */
2955                 wqe->fcp_trsp.wqe_com.abort_tag = nvmewqe->iotag;
2956
2957                 /* Word 9 */
2958                 bf_set(wqe_reqtag, &wqe->fcp_trsp.wqe_com, nvmewqe->iotag);
2959                 bf_set(wqe_rcvoxid, &wqe->fcp_trsp.wqe_com, ctxp->oxid);
2960
2961                 /* Word 10 */
2962                 if (xc)
2963                         bf_set(wqe_xc, &wqe->fcp_trsp.wqe_com, 1);
2964
2965                 /* Word 11 */
2966                 /* In template wqes=0 irsp=0 irsplen=0 - good response */
2967                 if (rsp->rsplen != LPFC_NVMET_SUCCESS_LEN) {
2968                         /* Bad response - embed it */
2969                         bf_set(wqe_wqes, &wqe->fcp_trsp.wqe_com, 1);
2970                         bf_set(wqe_irsp, &wqe->fcp_trsp.wqe_com, 1);
2971                         bf_set(wqe_irsplen, &wqe->fcp_trsp.wqe_com,
2972                                ((rsp->rsplen >> 2) - 1));
2973                         memcpy(&wqe->words[16], rsp->rspaddr, rsp->rsplen);
2974                 }
2975                 do_pbde = 0;
2976
2977                 /* Word 12 */
2978                 wqe->fcp_trsp.rsvd_12_15[0] = 0;
2979
2980                 /* Use rspbuf, NOT sg list */
2981                 nsegs = 0;
2982                 sgl->word2 = 0;
2983                 atomic_inc(&tgtp->xmt_fcp_rsp);
2984                 break;
2985
2986         default:
2987                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
2988                                 "6064 Unknown Rsp Op %d\n",
2989                                 rsp->op);
2990                 return NULL;
2991         }
2992
2993         nvmewqe->retry = 1;
2994         nvmewqe->vport = phba->pport;
2995         nvmewqe->drvrTimeout = (phba->fc_ratov * 3) + LPFC_DRVR_TIMEOUT;
2996         nvmewqe->context1 = ndlp;
2997
2998         for_each_sg(rsp->sg, sgel, nsegs, i) {
2999                 physaddr = sg_dma_address(sgel);
3000                 cnt = sg_dma_len(sgel);
3001                 sgl->addr_hi = putPaddrHigh(physaddr);
3002                 sgl->addr_lo = putPaddrLow(physaddr);
3003                 sgl->word2 = 0;
3004                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
3005                 bf_set(lpfc_sli4_sge_offset, sgl, ctxp->offset);
3006                 if ((i+1) == rsp->sg_cnt)
3007                         bf_set(lpfc_sli4_sge_last, sgl, 1);
3008                 sgl->word2 = cpu_to_le32(sgl->word2);
3009                 sgl->sge_len = cpu_to_le32(cnt);
3010                 if (i == 0) {
3011                         bde = (struct ulp_bde64 *)&wqe->words[13];
3012                         if (do_pbde) {
3013                                 /* Words 13-15  (PBDE) */
3014                                 bde->addrLow = sgl->addr_lo;
3015                                 bde->addrHigh = sgl->addr_hi;
3016                                 bde->tus.f.bdeSize =
3017                                         le32_to_cpu(sgl->sge_len);
3018                                 bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
3019                                 bde->tus.w = cpu_to_le32(bde->tus.w);
3020                         } else {
3021                                 memset(bde, 0, sizeof(struct ulp_bde64));
3022                         }
3023                 }
3024                 sgl++;
3025                 ctxp->offset += cnt;
3026         }
3027         ctxp->state = LPFC_NVME_STE_DATA;
3028         ctxp->entry_cnt++;
3029         return nvmewqe;
3030 }
3031
3032 /**
3033  * lpfc_nvmet_sol_fcp_abort_cmp - Completion handler for ABTS
3034  * @phba: Pointer to HBA context object.
3035  * @cmdwqe: Pointer to driver command WQE object.
3036  * @wcqe: Pointer to driver response CQE object.
3037  *
3038  * The function is called from SLI ring event handler with no
3039  * lock held. This function is the completion handler for NVME ABTS for FCP cmds
3040  * The function frees memory resources used for the NVME commands.
3041  **/
3042 static void
3043 lpfc_nvmet_sol_fcp_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3044                              struct lpfc_wcqe_complete *wcqe)
3045 {
3046         struct lpfc_async_xchg_ctx *ctxp;
3047         struct lpfc_nvmet_tgtport *tgtp;
3048         uint32_t result;
3049         unsigned long flags;
3050         bool released = false;
3051
3052         ctxp = cmdwqe->context2;
3053         result = wcqe->parameter;
3054
3055         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3056         if (ctxp->flag & LPFC_NVME_ABORT_OP)
3057                 atomic_inc(&tgtp->xmt_fcp_abort_cmpl);
3058
3059         spin_lock_irqsave(&ctxp->ctxlock, flags);
3060         ctxp->state = LPFC_NVME_STE_DONE;
3061
3062         /* Check if we already received a free context call
3063          * and we have completed processing an abort situation.
3064          */
3065         if ((ctxp->flag & LPFC_NVME_CTX_RLS) &&
3066             !(ctxp->flag & LPFC_NVME_XBUSY)) {
3067                 spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3068                 list_del_init(&ctxp->list);
3069                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3070                 released = true;
3071         }
3072         ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3073         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3074         atomic_inc(&tgtp->xmt_abort_rsp);
3075
3076         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3077                         "6165 ABORT cmpl: oxid x%x flg x%x (%d) "
3078                         "WCQE: %08x %08x %08x %08x\n",
3079                         ctxp->oxid, ctxp->flag, released,
3080                         wcqe->word0, wcqe->total_data_placed,
3081                         result, wcqe->word3);
3082
3083         cmdwqe->context2 = NULL;
3084         cmdwqe->context3 = NULL;
3085         /*
3086          * if transport has released ctx, then can reuse it. Otherwise,
3087          * will be recycled by transport release call.
3088          */
3089         if (released)
3090                 lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
3091
3092         /* This is the iocbq for the abort, not the command */
3093         lpfc_sli_release_iocbq(phba, cmdwqe);
3094
3095         /* Since iaab/iaar are NOT set, there is no work left.
3096          * For LPFC_NVME_XBUSY, lpfc_sli4_nvmet_xri_aborted
3097          * should have been called already.
3098          */
3099 }
3100
3101 /**
3102  * lpfc_nvmet_unsol_fcp_abort_cmp - Completion handler for ABTS
3103  * @phba: Pointer to HBA context object.
3104  * @cmdwqe: Pointer to driver command WQE object.
3105  * @wcqe: Pointer to driver response CQE object.
3106  *
3107  * The function is called from SLI ring event handler with no
3108  * lock held. This function is the completion handler for NVME ABTS for FCP cmds
3109  * The function frees memory resources used for the NVME commands.
3110  **/
3111 static void
3112 lpfc_nvmet_unsol_fcp_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3113                                struct lpfc_wcqe_complete *wcqe)
3114 {
3115         struct lpfc_async_xchg_ctx *ctxp;
3116         struct lpfc_nvmet_tgtport *tgtp;
3117         unsigned long flags;
3118         uint32_t result;
3119         bool released = false;
3120
3121         ctxp = cmdwqe->context2;
3122         result = wcqe->parameter;
3123
3124         if (!ctxp) {
3125                 /* if context is clear, related io alrady complete */
3126                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3127                                 "6070 ABTS cmpl: WCQE: %08x %08x %08x %08x\n",
3128                                 wcqe->word0, wcqe->total_data_placed,
3129                                 result, wcqe->word3);
3130                 return;
3131         }
3132
3133         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3134         spin_lock_irqsave(&ctxp->ctxlock, flags);
3135         if (ctxp->flag & LPFC_NVME_ABORT_OP)
3136                 atomic_inc(&tgtp->xmt_fcp_abort_cmpl);
3137
3138         /* Sanity check */
3139         if (ctxp->state != LPFC_NVME_STE_ABORT) {
3140                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3141                                 "6112 ABTS Wrong state:%d oxid x%x\n",
3142                                 ctxp->state, ctxp->oxid);
3143         }
3144
3145         /* Check if we already received a free context call
3146          * and we have completed processing an abort situation.
3147          */
3148         ctxp->state = LPFC_NVME_STE_DONE;
3149         if ((ctxp->flag & LPFC_NVME_CTX_RLS) &&
3150             !(ctxp->flag & LPFC_NVME_XBUSY)) {
3151                 spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3152                 list_del_init(&ctxp->list);
3153                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3154                 released = true;
3155         }
3156         ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3157         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3158         atomic_inc(&tgtp->xmt_abort_rsp);
3159
3160         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3161                         "6316 ABTS cmpl oxid x%x flg x%x (%x) "
3162                         "WCQE: %08x %08x %08x %08x\n",
3163                         ctxp->oxid, ctxp->flag, released,
3164                         wcqe->word0, wcqe->total_data_placed,
3165                         result, wcqe->word3);
3166
3167         cmdwqe->context2 = NULL;
3168         cmdwqe->context3 = NULL;
3169         /*
3170          * if transport has released ctx, then can reuse it. Otherwise,
3171          * will be recycled by transport release call.
3172          */
3173         if (released)
3174                 lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
3175
3176         /* Since iaab/iaar are NOT set, there is no work left.
3177          * For LPFC_NVME_XBUSY, lpfc_sli4_nvmet_xri_aborted
3178          * should have been called already.
3179          */
3180 }
3181
3182 /**
3183  * lpfc_nvmet_xmt_ls_abort_cmp - Completion handler for ABTS
3184  * @phba: Pointer to HBA context object.
3185  * @cmdwqe: Pointer to driver command WQE object.
3186  * @wcqe: Pointer to driver response CQE object.
3187  *
3188  * The function is called from SLI ring event handler with no
3189  * lock held. This function is the completion handler for NVME ABTS for LS cmds
3190  * The function frees memory resources used for the NVME commands.
3191  **/
3192 static void
3193 lpfc_nvmet_xmt_ls_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3194                             struct lpfc_wcqe_complete *wcqe)
3195 {
3196         struct lpfc_async_xchg_ctx *ctxp;
3197         struct lpfc_nvmet_tgtport *tgtp;
3198         uint32_t result;
3199
3200         ctxp = cmdwqe->context2;
3201         result = wcqe->parameter;
3202
3203         if (phba->nvmet_support) {
3204                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3205                 atomic_inc(&tgtp->xmt_ls_abort_cmpl);
3206         }
3207
3208         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3209                         "6083 Abort cmpl: ctx x%px WCQE:%08x %08x %08x %08x\n",
3210                         ctxp, wcqe->word0, wcqe->total_data_placed,
3211                         result, wcqe->word3);
3212
3213         if (!ctxp) {
3214                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3215                                 "6415 NVMET LS Abort No ctx: WCQE: "
3216                                  "%08x %08x %08x %08x\n",
3217                                 wcqe->word0, wcqe->total_data_placed,
3218                                 result, wcqe->word3);
3219
3220                 lpfc_sli_release_iocbq(phba, cmdwqe);
3221                 return;
3222         }
3223
3224         if (ctxp->state != LPFC_NVME_STE_LS_ABORT) {
3225                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3226                                 "6416 NVMET LS abort cmpl state mismatch: "
3227                                 "oxid x%x: %d %d\n",
3228                                 ctxp->oxid, ctxp->state, ctxp->entry_cnt);
3229         }
3230
3231         cmdwqe->context2 = NULL;
3232         cmdwqe->context3 = NULL;
3233         lpfc_sli_release_iocbq(phba, cmdwqe);
3234         kfree(ctxp);
3235 }
3236
3237 static int
3238 lpfc_nvmet_unsol_issue_abort(struct lpfc_hba *phba,
3239                              struct lpfc_async_xchg_ctx *ctxp,
3240                              uint32_t sid, uint16_t xri)
3241 {
3242         struct lpfc_nvmet_tgtport *tgtp = NULL;
3243         struct lpfc_iocbq *abts_wqeq;
3244         union lpfc_wqe128 *wqe_abts;
3245         struct lpfc_nodelist *ndlp;
3246
3247         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3248                         "6067 ABTS: sid %x xri x%x/x%x\n",
3249                         sid, xri, ctxp->wqeq->sli4_xritag);
3250
3251         if (phba->nvmet_support && phba->targetport)
3252                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3253
3254         ndlp = lpfc_findnode_did(phba->pport, sid);
3255         if (!ndlp ||
3256             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
3257             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
3258                 if (tgtp)
3259                         atomic_inc(&tgtp->xmt_abort_rsp_error);
3260                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3261                                 "6134 Drop ABTS - wrong NDLP state x%x.\n",
3262                                 (ndlp) ? ndlp->nlp_state : NLP_STE_MAX_STATE);
3263
3264                 /* No failure to an ABTS request. */
3265                 return 0;
3266         }
3267
3268         abts_wqeq = ctxp->wqeq;
3269         wqe_abts = &abts_wqeq->wqe;
3270
3271         /*
3272          * Since we zero the whole WQE, we need to ensure we set the WQE fields
3273          * that were initialized in lpfc_sli4_nvmet_alloc.
3274          */
3275         memset(wqe_abts, 0, sizeof(union lpfc_wqe));
3276
3277         /* Word 5 */
3278         bf_set(wqe_dfctl, &wqe_abts->xmit_sequence.wge_ctl, 0);
3279         bf_set(wqe_ls, &wqe_abts->xmit_sequence.wge_ctl, 1);
3280         bf_set(wqe_la, &wqe_abts->xmit_sequence.wge_ctl, 0);
3281         bf_set(wqe_rctl, &wqe_abts->xmit_sequence.wge_ctl, FC_RCTL_BA_ABTS);
3282         bf_set(wqe_type, &wqe_abts->xmit_sequence.wge_ctl, FC_TYPE_BLS);
3283
3284         /* Word 6 */
3285         bf_set(wqe_ctxt_tag, &wqe_abts->xmit_sequence.wqe_com,
3286                phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
3287         bf_set(wqe_xri_tag, &wqe_abts->xmit_sequence.wqe_com,
3288                abts_wqeq->sli4_xritag);
3289
3290         /* Word 7 */
3291         bf_set(wqe_cmnd, &wqe_abts->xmit_sequence.wqe_com,
3292                CMD_XMIT_SEQUENCE64_WQE);
3293         bf_set(wqe_ct, &wqe_abts->xmit_sequence.wqe_com, SLI4_CT_RPI);
3294         bf_set(wqe_class, &wqe_abts->xmit_sequence.wqe_com, CLASS3);
3295         bf_set(wqe_pu, &wqe_abts->xmit_sequence.wqe_com, 0);
3296
3297         /* Word 8 */
3298         wqe_abts->xmit_sequence.wqe_com.abort_tag = abts_wqeq->iotag;
3299
3300         /* Word 9 */
3301         bf_set(wqe_reqtag, &wqe_abts->xmit_sequence.wqe_com, abts_wqeq->iotag);
3302         /* Needs to be set by caller */
3303         bf_set(wqe_rcvoxid, &wqe_abts->xmit_sequence.wqe_com, xri);
3304
3305         /* Word 10 */
3306         bf_set(wqe_iod, &wqe_abts->xmit_sequence.wqe_com, LPFC_WQE_IOD_WRITE);
3307         bf_set(wqe_lenloc, &wqe_abts->xmit_sequence.wqe_com,
3308                LPFC_WQE_LENLOC_WORD12);
3309         bf_set(wqe_ebde_cnt, &wqe_abts->xmit_sequence.wqe_com, 0);
3310         bf_set(wqe_qosd, &wqe_abts->xmit_sequence.wqe_com, 0);
3311
3312         /* Word 11 */
3313         bf_set(wqe_cqid, &wqe_abts->xmit_sequence.wqe_com,
3314                LPFC_WQE_CQ_ID_DEFAULT);
3315         bf_set(wqe_cmd_type, &wqe_abts->xmit_sequence.wqe_com,
3316                OTHER_COMMAND);
3317
3318         abts_wqeq->vport = phba->pport;
3319         abts_wqeq->context1 = ndlp;
3320         abts_wqeq->context2 = ctxp;
3321         abts_wqeq->context3 = NULL;
3322         abts_wqeq->rsvd2 = 0;
3323         /* hba_wqidx should already be setup from command we are aborting */
3324         abts_wqeq->iocb.ulpCommand = CMD_XMIT_SEQUENCE64_CR;
3325         abts_wqeq->iocb.ulpLe = 1;
3326
3327         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3328                         "6069 Issue ABTS to xri x%x reqtag x%x\n",
3329                         xri, abts_wqeq->iotag);
3330         return 1;
3331 }
3332
3333 /**
3334  * lpfc_nvmet_prep_abort_wqe - set up 'abort' work queue entry.
3335  * @pwqeq: Pointer to command iocb.
3336  * @xritag: Tag that  uniqely identifies the local exchange resource.
3337  * @opt: Option bits -
3338  *              bit 0 = inhibit sending abts on the link
3339  *
3340  * This function is called with hbalock held.
3341  **/
3342 static void
3343 lpfc_nvmet_prep_abort_wqe(struct lpfc_iocbq *pwqeq, u16 xritag, u8 opt)
3344 {
3345         union lpfc_wqe128 *wqe = &pwqeq->wqe;
3346
3347         /* WQEs are reused.  Clear stale data and set key fields to
3348          * zero like ia, iaab, iaar, xri_tag, and ctxt_tag.
3349          */
3350         memset(wqe, 0, sizeof(*wqe));
3351
3352         if (opt & INHIBIT_ABORT)
3353                 bf_set(abort_cmd_ia, &wqe->abort_cmd, 1);
3354         /* Abort specified xri tag, with the mask deliberately zeroed */
3355         bf_set(abort_cmd_criteria, &wqe->abort_cmd, T_XRI_TAG);
3356
3357         bf_set(wqe_cmnd, &wqe->abort_cmd.wqe_com, CMD_ABORT_XRI_CX);
3358
3359         /* Abort the I/O associated with this outstanding exchange ID. */
3360         wqe->abort_cmd.wqe_com.abort_tag = xritag;
3361
3362         /* iotag for the wqe completion. */
3363         bf_set(wqe_reqtag, &wqe->abort_cmd.wqe_com, pwqeq->iotag);
3364
3365         bf_set(wqe_qosd, &wqe->abort_cmd.wqe_com, 1);
3366         bf_set(wqe_lenloc, &wqe->abort_cmd.wqe_com, LPFC_WQE_LENLOC_NONE);
3367
3368         bf_set(wqe_cmd_type, &wqe->abort_cmd.wqe_com, OTHER_COMMAND);
3369         bf_set(wqe_wqec, &wqe->abort_cmd.wqe_com, 1);
3370         bf_set(wqe_cqid, &wqe->abort_cmd.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
3371 }
3372
3373 static int
3374 lpfc_nvmet_sol_fcp_issue_abort(struct lpfc_hba *phba,
3375                                struct lpfc_async_xchg_ctx *ctxp,
3376                                uint32_t sid, uint16_t xri)
3377 {
3378         struct lpfc_nvmet_tgtport *tgtp;
3379         struct lpfc_iocbq *abts_wqeq;
3380         struct lpfc_nodelist *ndlp;
3381         unsigned long flags;
3382         u8 opt;
3383         int rc;
3384
3385         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3386         if (!ctxp->wqeq) {
3387                 ctxp->wqeq = ctxp->ctxbuf->iocbq;
3388                 ctxp->wqeq->hba_wqidx = 0;
3389         }
3390
3391         ndlp = lpfc_findnode_did(phba->pport, sid);
3392         if (!ndlp ||
3393             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
3394             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
3395                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3396                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3397                                 "6160 Drop ABORT - wrong NDLP state x%x.\n",
3398                                 (ndlp) ? ndlp->nlp_state : NLP_STE_MAX_STATE);
3399
3400                 /* No failure to an ABTS request. */
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         /* Issue ABTS for this WQE based on iotag */
3408         ctxp->abort_wqeq = lpfc_sli_get_iocbq(phba);
3409         spin_lock_irqsave(&ctxp->ctxlock, flags);
3410         if (!ctxp->abort_wqeq) {
3411                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3412                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3413                                 "6161 ABORT failed: No wqeqs: "
3414                                 "xri: x%x\n", ctxp->oxid);
3415                 /* No failure to an ABTS request. */
3416                 ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3417                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3418                 return 0;
3419         }
3420         abts_wqeq = ctxp->abort_wqeq;
3421         ctxp->state = LPFC_NVME_STE_ABORT;
3422         opt = (ctxp->flag & LPFC_NVME_ABTS_RCV) ? INHIBIT_ABORT : 0;
3423         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3424
3425         /* Announce entry to new IO submit field. */
3426         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3427                         "6162 ABORT Request to rport DID x%06x "
3428                         "for xri x%x x%x\n",
3429                         ctxp->sid, ctxp->oxid, ctxp->wqeq->sli4_xritag);
3430
3431         /* If the hba is getting reset, this flag is set.  It is
3432          * cleared when the reset is complete and rings reestablished.
3433          */
3434         spin_lock_irqsave(&phba->hbalock, flags);
3435         /* driver queued commands are in process of being flushed */
3436         if (phba->hba_flag & HBA_IOQ_FLUSH) {
3437                 spin_unlock_irqrestore(&phba->hbalock, flags);
3438                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3439                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3440                                 "6163 Driver in reset cleanup - flushing "
3441                                 "NVME Req now. hba_flag x%x oxid x%x\n",
3442                                 phba->hba_flag, ctxp->oxid);
3443                 lpfc_sli_release_iocbq(phba, abts_wqeq);
3444                 spin_lock_irqsave(&ctxp->ctxlock, flags);
3445                 ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3446                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3447                 return 0;
3448         }
3449
3450         /* Outstanding abort is in progress */
3451         if (abts_wqeq->iocb_flag & LPFC_DRIVER_ABORTED) {
3452                 spin_unlock_irqrestore(&phba->hbalock, flags);
3453                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3454                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3455                                 "6164 Outstanding NVME I/O Abort Request "
3456                                 "still pending on oxid x%x\n",
3457                                 ctxp->oxid);
3458                 lpfc_sli_release_iocbq(phba, abts_wqeq);
3459                 spin_lock_irqsave(&ctxp->ctxlock, flags);
3460                 ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3461                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3462                 return 0;
3463         }
3464
3465         /* Ready - mark outstanding as aborted by driver. */
3466         abts_wqeq->iocb_flag |= LPFC_DRIVER_ABORTED;
3467
3468         lpfc_nvmet_prep_abort_wqe(abts_wqeq, ctxp->wqeq->sli4_xritag, opt);
3469
3470         /* ABTS WQE must go to the same WQ as the WQE to be aborted */
3471         abts_wqeq->hba_wqidx = ctxp->wqeq->hba_wqidx;
3472         abts_wqeq->wqe_cmpl = lpfc_nvmet_sol_fcp_abort_cmp;
3473         abts_wqeq->iocb_cmpl = NULL;
3474         abts_wqeq->iocb_flag |= LPFC_IO_NVME;
3475         abts_wqeq->context2 = ctxp;
3476         abts_wqeq->vport = phba->pport;
3477         if (!ctxp->hdwq)
3478                 ctxp->hdwq = &phba->sli4_hba.hdwq[abts_wqeq->hba_wqidx];
3479
3480         rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, abts_wqeq);
3481         spin_unlock_irqrestore(&phba->hbalock, flags);
3482         if (rc == WQE_SUCCESS) {
3483                 atomic_inc(&tgtp->xmt_abort_sol);
3484                 return 0;
3485         }
3486
3487         atomic_inc(&tgtp->xmt_abort_rsp_error);
3488         spin_lock_irqsave(&ctxp->ctxlock, flags);
3489         ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3490         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3491         lpfc_sli_release_iocbq(phba, abts_wqeq);
3492         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3493                         "6166 Failed ABORT issue_wqe with status x%x "
3494                         "for oxid x%x.\n",
3495                         rc, ctxp->oxid);
3496         return 1;
3497 }
3498
3499 static int
3500 lpfc_nvmet_unsol_fcp_issue_abort(struct lpfc_hba *phba,
3501                                  struct lpfc_async_xchg_ctx *ctxp,
3502                                  uint32_t sid, uint16_t xri)
3503 {
3504         struct lpfc_nvmet_tgtport *tgtp;
3505         struct lpfc_iocbq *abts_wqeq;
3506         unsigned long flags;
3507         bool released = false;
3508         int rc;
3509
3510         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3511         if (!ctxp->wqeq) {
3512                 ctxp->wqeq = ctxp->ctxbuf->iocbq;
3513                 ctxp->wqeq->hba_wqidx = 0;
3514         }
3515
3516         if (ctxp->state == LPFC_NVME_STE_FREE) {
3517                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3518                                 "6417 NVMET ABORT ctx freed %d %d oxid x%x\n",
3519                                 ctxp->state, ctxp->entry_cnt, ctxp->oxid);
3520                 rc = WQE_BUSY;
3521                 goto aerr;
3522         }
3523         ctxp->state = LPFC_NVME_STE_ABORT;
3524         ctxp->entry_cnt++;
3525         rc = lpfc_nvmet_unsol_issue_abort(phba, ctxp, sid, xri);
3526         if (rc == 0)
3527                 goto aerr;
3528
3529         spin_lock_irqsave(&phba->hbalock, flags);
3530         abts_wqeq = ctxp->wqeq;
3531         abts_wqeq->wqe_cmpl = lpfc_nvmet_unsol_fcp_abort_cmp;
3532         abts_wqeq->iocb_cmpl = NULL;
3533         abts_wqeq->iocb_flag |= LPFC_IO_NVMET;
3534         if (!ctxp->hdwq)
3535                 ctxp->hdwq = &phba->sli4_hba.hdwq[abts_wqeq->hba_wqidx];
3536
3537         rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, abts_wqeq);
3538         spin_unlock_irqrestore(&phba->hbalock, flags);
3539         if (rc == WQE_SUCCESS) {
3540                 return 0;
3541         }
3542
3543 aerr:
3544         spin_lock_irqsave(&ctxp->ctxlock, flags);
3545         if (ctxp->flag & LPFC_NVME_CTX_RLS) {
3546                 spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3547                 list_del_init(&ctxp->list);
3548                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3549                 released = true;
3550         }
3551         ctxp->flag &= ~(LPFC_NVME_ABORT_OP | LPFC_NVME_CTX_RLS);
3552         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3553
3554         atomic_inc(&tgtp->xmt_abort_rsp_error);
3555         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3556                         "6135 Failed to Issue ABTS for oxid x%x. Status x%x "
3557                         "(%x)\n",
3558                         ctxp->oxid, rc, released);
3559         if (released)
3560                 lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
3561         return 1;
3562 }
3563
3564 /**
3565  * lpfc_nvme_unsol_ls_issue_abort - issue ABTS on an exchange received
3566  *        via async frame receive where the frame is not handled.
3567  * @phba: pointer to adapter structure
3568  * @ctxp: pointer to the asynchronously received received sequence
3569  * @sid: address of the remote port to send the ABTS to
3570  * @xri: oxid value to for the ABTS (other side's exchange id).
3571  **/
3572 int
3573 lpfc_nvme_unsol_ls_issue_abort(struct lpfc_hba *phba,
3574                                 struct lpfc_async_xchg_ctx *ctxp,
3575                                 uint32_t sid, uint16_t xri)
3576 {
3577         struct lpfc_nvmet_tgtport *tgtp = NULL;
3578         struct lpfc_iocbq *abts_wqeq;
3579         unsigned long flags;
3580         int rc;
3581
3582         if ((ctxp->state == LPFC_NVME_STE_LS_RCV && ctxp->entry_cnt == 1) ||
3583             (ctxp->state == LPFC_NVME_STE_LS_RSP && ctxp->entry_cnt == 2)) {
3584                 ctxp->state = LPFC_NVME_STE_LS_ABORT;
3585                 ctxp->entry_cnt++;
3586         } else {
3587                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3588                                 "6418 NVMET LS abort state mismatch "
3589                                 "IO x%x: %d %d\n",
3590                                 ctxp->oxid, ctxp->state, ctxp->entry_cnt);
3591                 ctxp->state = LPFC_NVME_STE_LS_ABORT;
3592         }
3593
3594         if (phba->nvmet_support && phba->targetport)
3595                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3596
3597         if (!ctxp->wqeq) {
3598                 /* Issue ABTS for this WQE based on iotag */
3599                 ctxp->wqeq = lpfc_sli_get_iocbq(phba);
3600                 if (!ctxp->wqeq) {
3601                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3602                                         "6068 Abort failed: No wqeqs: "
3603                                         "xri: x%x\n", xri);
3604                         /* No failure to an ABTS request. */
3605                         kfree(ctxp);
3606                         return 0;
3607                 }
3608         }
3609         abts_wqeq = ctxp->wqeq;
3610
3611         if (lpfc_nvmet_unsol_issue_abort(phba, ctxp, sid, xri) == 0) {
3612                 rc = WQE_BUSY;
3613                 goto out;
3614         }
3615
3616         spin_lock_irqsave(&phba->hbalock, flags);
3617         abts_wqeq->wqe_cmpl = lpfc_nvmet_xmt_ls_abort_cmp;
3618         abts_wqeq->iocb_cmpl = NULL;
3619         abts_wqeq->iocb_flag |=  LPFC_IO_NVME_LS;
3620         rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, abts_wqeq);
3621         spin_unlock_irqrestore(&phba->hbalock, flags);
3622         if (rc == WQE_SUCCESS) {
3623                 if (tgtp)
3624                         atomic_inc(&tgtp->xmt_abort_unsol);
3625                 return 0;
3626         }
3627 out:
3628         if (tgtp)
3629                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3630         abts_wqeq->context2 = NULL;
3631         abts_wqeq->context3 = NULL;
3632         lpfc_sli_release_iocbq(phba, abts_wqeq);
3633         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3634                         "6056 Failed to Issue ABTS. Status x%x\n", rc);
3635         return 1;
3636 }
3637
3638 /**
3639  * lpfc_nvmet_invalidate_host
3640  *
3641  * @phba: pointer to the driver instance bound to an adapter port.
3642  * @ndlp: pointer to an lpfc_nodelist type
3643  *
3644  * This routine upcalls the nvmet transport to invalidate an NVME
3645  * host to which this target instance had active connections.
3646  */
3647 void
3648 lpfc_nvmet_invalidate_host(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
3649 {
3650         u32 ndlp_has_hh;
3651         struct lpfc_nvmet_tgtport *tgtp;
3652
3653         lpfc_printf_log(phba, KERN_INFO,
3654                         LOG_NVME | LOG_NVME_ABTS | LOG_NVME_DISC,
3655                         "6203 Invalidating hosthandle x%px\n",
3656                         ndlp);
3657
3658         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3659         atomic_set(&tgtp->state, LPFC_NVMET_INV_HOST_ACTIVE);
3660
3661         spin_lock_irq(&ndlp->lock);
3662         ndlp_has_hh = ndlp->fc4_xpt_flags & NLP_XPT_HAS_HH;
3663         spin_unlock_irq(&ndlp->lock);
3664
3665         /* Do not invalidate any nodes that do not have a hosthandle.
3666          * The host_release callbk will cause a node reference
3667          * count imbalance and a crash.
3668          */
3669         if (!ndlp_has_hh) {
3670                 lpfc_printf_log(phba, KERN_INFO,
3671                                 LOG_NVME | LOG_NVME_ABTS | LOG_NVME_DISC,
3672                                 "6204 Skip invalidate on node x%px DID x%x\n",
3673                                 ndlp, ndlp->nlp_DID);
3674                 return;
3675         }
3676
3677 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
3678         /* Need to get the nvmet_fc_target_port pointer here.*/
3679         nvmet_fc_invalidate_host(phba->targetport, ndlp);
3680 #endif
3681 }