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_lock(&ctxp->ctxlock);
1801                 /* Check if we already received a free context call
1802                  * and we have completed processing an abort situation.
1803                  */
1804                 if (ctxp->flag & LPFC_NVME_CTX_RLS &&
1805                     !(ctxp->flag & LPFC_NVME_ABORT_OP)) {
1806                         list_del_init(&ctxp->list);
1807                         released = true;
1808                 }
1809                 ctxp->flag &= ~LPFC_NVME_XBUSY;
1810                 spin_unlock(&ctxp->ctxlock);
1811                 spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock,
1812                                        iflag);
1813
1814                 rrq_empty = list_empty(&phba->active_rrq_list);
1815                 ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
1816                 if (ndlp &&
1817                     (ndlp->nlp_state == NLP_STE_UNMAPPED_NODE ||
1818                      ndlp->nlp_state == NLP_STE_MAPPED_NODE)) {
1819                         lpfc_set_rrq_active(phba, ndlp,
1820                                 ctxp->ctxbuf->sglq->sli4_lxritag,
1821                                 rxid, 1);
1822                         lpfc_sli4_abts_err_handler(phba, ndlp, axri);
1823                 }
1824
1825                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1826                                 "6318 XB aborted oxid x%x flg x%x (%x)\n",
1827                                 ctxp->oxid, ctxp->flag, released);
1828                 if (released)
1829                         lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
1830
1831                 if (rrq_empty)
1832                         lpfc_worker_wake_up(phba);
1833                 return;
1834         }
1835         spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1836         ctxp = lpfc_nvmet_get_ctx_for_xri(phba, xri);
1837         if (ctxp) {
1838                 /*
1839                  *  Abort already done by FW, so BA_ACC sent.
1840                  *  However, the transport may be unaware.
1841                  */
1842                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1843                                 "6323 NVMET Rcv ABTS xri x%x ctxp state x%x "
1844                                 "flag x%x oxid x%x rxid x%x\n",
1845                                 xri, ctxp->state, ctxp->flag, ctxp->oxid,
1846                                 rxid);
1847
1848                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
1849                 ctxp->flag |= LPFC_NVME_ABTS_RCV;
1850                 ctxp->state = LPFC_NVME_STE_ABORT;
1851                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1852
1853                 lpfc_nvmeio_data(phba,
1854                                  "NVMET ABTS RCV: xri x%x CPU %02x rjt %d\n",
1855                                  xri, raw_smp_processor_id(), 0);
1856
1857                 req = &ctxp->hdlrctx.fcp_req;
1858                 if (req)
1859                         nvmet_fc_rcv_fcp_abort(phba->targetport, req);
1860         }
1861 #endif
1862 }
1863
1864 int
1865 lpfc_nvmet_rcv_unsol_abort(struct lpfc_vport *vport,
1866                            struct fc_frame_header *fc_hdr)
1867 {
1868 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
1869         struct lpfc_hba *phba = vport->phba;
1870         struct lpfc_async_xchg_ctx *ctxp, *next_ctxp;
1871         struct nvmefc_tgt_fcp_req *rsp;
1872         uint32_t sid;
1873         uint16_t oxid, xri;
1874         unsigned long iflag = 0;
1875
1876         sid = sli4_sid_from_fc_hdr(fc_hdr);
1877         oxid = be16_to_cpu(fc_hdr->fh_ox_id);
1878
1879         spin_lock_irqsave(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1880         list_for_each_entry_safe(ctxp, next_ctxp,
1881                                  &phba->sli4_hba.lpfc_abts_nvmet_ctx_list,
1882                                  list) {
1883                 if (ctxp->oxid != oxid || ctxp->sid != sid)
1884                         continue;
1885
1886                 xri = ctxp->ctxbuf->sglq->sli4_xritag;
1887
1888                 spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock,
1889                                        iflag);
1890                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
1891                 ctxp->flag |= LPFC_NVME_ABTS_RCV;
1892                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1893
1894                 lpfc_nvmeio_data(phba,
1895                         "NVMET ABTS RCV: xri x%x CPU %02x rjt %d\n",
1896                         xri, raw_smp_processor_id(), 0);
1897
1898                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1899                                 "6319 NVMET Rcv ABTS:acc xri x%x\n", xri);
1900
1901                 rsp = &ctxp->hdlrctx.fcp_req;
1902                 nvmet_fc_rcv_fcp_abort(phba->targetport, rsp);
1903
1904                 /* Respond with BA_ACC accordingly */
1905                 lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 1);
1906                 return 0;
1907         }
1908         spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1909         /* check the wait list */
1910         if (phba->sli4_hba.nvmet_io_wait_cnt) {
1911                 struct rqb_dmabuf *nvmebuf;
1912                 struct fc_frame_header *fc_hdr_tmp;
1913                 u32 sid_tmp;
1914                 u16 oxid_tmp;
1915                 bool found = false;
1916
1917                 spin_lock_irqsave(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
1918
1919                 /* match by oxid and s_id */
1920                 list_for_each_entry(nvmebuf,
1921                                     &phba->sli4_hba.lpfc_nvmet_io_wait_list,
1922                                     hbuf.list) {
1923                         fc_hdr_tmp = (struct fc_frame_header *)
1924                                         (nvmebuf->hbuf.virt);
1925                         oxid_tmp = be16_to_cpu(fc_hdr_tmp->fh_ox_id);
1926                         sid_tmp = sli4_sid_from_fc_hdr(fc_hdr_tmp);
1927                         if (oxid_tmp != oxid || sid_tmp != sid)
1928                                 continue;
1929
1930                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1931                                         "6321 NVMET Rcv ABTS oxid x%x from x%x "
1932                                         "is waiting for a ctxp\n",
1933                                         oxid, sid);
1934
1935                         list_del_init(&nvmebuf->hbuf.list);
1936                         phba->sli4_hba.nvmet_io_wait_cnt--;
1937                         found = true;
1938                         break;
1939                 }
1940                 spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock,
1941                                        iflag);
1942
1943                 /* free buffer since already posted a new DMA buffer to RQ */
1944                 if (found) {
1945                         nvmebuf->hrq->rqbp->rqb_free_buffer(phba, nvmebuf);
1946                         /* Respond with BA_ACC accordingly */
1947                         lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 1);
1948                         return 0;
1949                 }
1950         }
1951
1952         /* check active list */
1953         ctxp = lpfc_nvmet_get_ctx_for_oxid(phba, oxid, sid);
1954         if (ctxp) {
1955                 xri = ctxp->ctxbuf->sglq->sli4_xritag;
1956
1957                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
1958                 ctxp->flag |= (LPFC_NVME_ABTS_RCV | LPFC_NVME_ABORT_OP);
1959                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1960
1961                 lpfc_nvmeio_data(phba,
1962                                  "NVMET ABTS RCV: xri x%x CPU %02x rjt %d\n",
1963                                  xri, raw_smp_processor_id(), 0);
1964
1965                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1966                                 "6322 NVMET Rcv ABTS:acc oxid x%x xri x%x "
1967                                 "flag x%x state x%x\n",
1968                                 ctxp->oxid, xri, ctxp->flag, ctxp->state);
1969
1970                 if (ctxp->flag & LPFC_NVME_TNOTIFY) {
1971                         /* Notify the transport */
1972                         nvmet_fc_rcv_fcp_abort(phba->targetport,
1973                                                &ctxp->hdlrctx.fcp_req);
1974                 } else {
1975                         cancel_work_sync(&ctxp->ctxbuf->defer_work);
1976                         spin_lock_irqsave(&ctxp->ctxlock, iflag);
1977                         lpfc_nvmet_defer_release(phba, ctxp);
1978                         spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1979                 }
1980                 lpfc_nvmet_sol_fcp_issue_abort(phba, ctxp, ctxp->sid,
1981                                                ctxp->oxid);
1982
1983                 lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 1);
1984                 return 0;
1985         }
1986
1987         lpfc_nvmeio_data(phba, "NVMET ABTS RCV: oxid x%x CPU %02x rjt %d\n",
1988                          oxid, raw_smp_processor_id(), 1);
1989
1990         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1991                         "6320 NVMET Rcv ABTS:rjt oxid x%x\n", oxid);
1992
1993         /* Respond with BA_RJT accordingly */
1994         lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 0);
1995 #endif
1996         return 0;
1997 }
1998
1999 static void
2000 lpfc_nvmet_wqfull_flush(struct lpfc_hba *phba, struct lpfc_queue *wq,
2001                         struct lpfc_async_xchg_ctx *ctxp)
2002 {
2003         struct lpfc_sli_ring *pring;
2004         struct lpfc_iocbq *nvmewqeq;
2005         struct lpfc_iocbq *next_nvmewqeq;
2006         unsigned long iflags;
2007         struct lpfc_wcqe_complete wcqe;
2008         struct lpfc_wcqe_complete *wcqep;
2009
2010         pring = wq->pring;
2011         wcqep = &wcqe;
2012
2013         /* Fake an ABORT error code back to cmpl routine */
2014         memset(wcqep, 0, sizeof(struct lpfc_wcqe_complete));
2015         bf_set(lpfc_wcqe_c_status, wcqep, IOSTAT_LOCAL_REJECT);
2016         wcqep->parameter = IOERR_ABORT_REQUESTED;
2017
2018         spin_lock_irqsave(&pring->ring_lock, iflags);
2019         list_for_each_entry_safe(nvmewqeq, next_nvmewqeq,
2020                                  &wq->wqfull_list, list) {
2021                 if (ctxp) {
2022                         /* Checking for a specific IO to flush */
2023                         if (nvmewqeq->context2 == ctxp) {
2024                                 list_del(&nvmewqeq->list);
2025                                 spin_unlock_irqrestore(&pring->ring_lock,
2026                                                        iflags);
2027                                 lpfc_nvmet_xmt_fcp_op_cmp(phba, nvmewqeq,
2028                                                           wcqep);
2029                                 return;
2030                         }
2031                         continue;
2032                 } else {
2033                         /* Flush all IOs */
2034                         list_del(&nvmewqeq->list);
2035                         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2036                         lpfc_nvmet_xmt_fcp_op_cmp(phba, nvmewqeq, wcqep);
2037                         spin_lock_irqsave(&pring->ring_lock, iflags);
2038                 }
2039         }
2040         if (!ctxp)
2041                 wq->q_flag &= ~HBA_NVMET_WQFULL;
2042         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2043 }
2044
2045 void
2046 lpfc_nvmet_wqfull_process(struct lpfc_hba *phba,
2047                           struct lpfc_queue *wq)
2048 {
2049 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2050         struct lpfc_sli_ring *pring;
2051         struct lpfc_iocbq *nvmewqeq;
2052         struct lpfc_async_xchg_ctx *ctxp;
2053         unsigned long iflags;
2054         int rc;
2055
2056         /*
2057          * Some WQE slots are available, so try to re-issue anything
2058          * on the WQ wqfull_list.
2059          */
2060         pring = wq->pring;
2061         spin_lock_irqsave(&pring->ring_lock, iflags);
2062         while (!list_empty(&wq->wqfull_list)) {
2063                 list_remove_head(&wq->wqfull_list, nvmewqeq, struct lpfc_iocbq,
2064                                  list);
2065                 spin_unlock_irqrestore(&pring->ring_lock, iflags);
2066                 ctxp = (struct lpfc_async_xchg_ctx *)nvmewqeq->context2;
2067                 rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, nvmewqeq);
2068                 spin_lock_irqsave(&pring->ring_lock, iflags);
2069                 if (rc == -EBUSY) {
2070                         /* WQ was full again, so put it back on the list */
2071                         list_add(&nvmewqeq->list, &wq->wqfull_list);
2072                         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2073                         return;
2074                 }
2075                 if (rc == WQE_SUCCESS) {
2076 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2077                         if (ctxp->ts_cmd_nvme) {
2078                                 if (ctxp->hdlrctx.fcp_req.op == NVMET_FCOP_RSP)
2079                                         ctxp->ts_status_wqput = ktime_get_ns();
2080                                 else
2081                                         ctxp->ts_data_wqput = ktime_get_ns();
2082                         }
2083 #endif
2084                 } else {
2085                         WARN_ON(rc);
2086                 }
2087         }
2088         wq->q_flag &= ~HBA_NVMET_WQFULL;
2089         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2090
2091 #endif
2092 }
2093
2094 void
2095 lpfc_nvmet_destroy_targetport(struct lpfc_hba *phba)
2096 {
2097 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2098         struct lpfc_nvmet_tgtport *tgtp;
2099         struct lpfc_queue *wq;
2100         uint32_t qidx;
2101         DECLARE_COMPLETION_ONSTACK(tport_unreg_cmp);
2102
2103         if (phba->nvmet_support == 0)
2104                 return;
2105         if (phba->targetport) {
2106                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2107                 for (qidx = 0; qidx < phba->cfg_hdw_queue; qidx++) {
2108                         wq = phba->sli4_hba.hdwq[qidx].io_wq;
2109                         lpfc_nvmet_wqfull_flush(phba, wq, NULL);
2110                 }
2111                 tgtp->tport_unreg_cmp = &tport_unreg_cmp;
2112                 nvmet_fc_unregister_targetport(phba->targetport);
2113                 if (!wait_for_completion_timeout(&tport_unreg_cmp,
2114                                         msecs_to_jiffies(LPFC_NVMET_WAIT_TMO)))
2115                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2116                                         "6179 Unreg targetport x%px timeout "
2117                                         "reached.\n", phba->targetport);
2118                 lpfc_nvmet_cleanup_io_context(phba);
2119         }
2120         phba->targetport = NULL;
2121 #endif
2122 }
2123
2124 /**
2125  * lpfc_nvmet_handle_lsreq - Process an NVME LS request
2126  * @phba: pointer to lpfc hba data structure.
2127  * @axchg: pointer to exchange context for the NVME LS request
2128  *
2129  * This routine is used for processing an asychronously received NVME LS
2130  * request. Any remaining validation is done and the LS is then forwarded
2131  * to the nvmet-fc transport via nvmet_fc_rcv_ls_req().
2132  *
2133  * The calling sequence should be: nvmet_fc_rcv_ls_req() -> (processing)
2134  * -> lpfc_nvmet_xmt_ls_rsp/cmp -> req->done.
2135  * lpfc_nvme_xmt_ls_rsp_cmp should free the allocated axchg.
2136  *
2137  * Returns 0 if LS was handled and delivered to the transport
2138  * Returns 1 if LS failed to be handled and should be dropped
2139  */
2140 int
2141 lpfc_nvmet_handle_lsreq(struct lpfc_hba *phba,
2142                         struct lpfc_async_xchg_ctx *axchg)
2143 {
2144 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2145         struct lpfc_nvmet_tgtport *tgtp = phba->targetport->private;
2146         uint32_t *payload = axchg->payload;
2147         int rc;
2148
2149         atomic_inc(&tgtp->rcv_ls_req_in);
2150
2151         /*
2152          * Driver passes the ndlp as the hosthandle argument allowing
2153          * the transport to generate LS requests for any associateions
2154          * that are created.
2155          */
2156         rc = nvmet_fc_rcv_ls_req(phba->targetport, axchg->ndlp, &axchg->ls_rsp,
2157                                  axchg->payload, axchg->size);
2158
2159         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
2160                         "6037 NVMET Unsol rcv: sz %d rc %d: %08x %08x %08x "
2161                         "%08x %08x %08x\n", axchg->size, rc,
2162                         *payload, *(payload+1), *(payload+2),
2163                         *(payload+3), *(payload+4), *(payload+5));
2164
2165         if (!rc) {
2166                 atomic_inc(&tgtp->rcv_ls_req_out);
2167                 return 0;
2168         }
2169
2170         atomic_inc(&tgtp->rcv_ls_req_drop);
2171 #endif
2172         return 1;
2173 }
2174
2175 static void
2176 lpfc_nvmet_process_rcv_fcp_req(struct lpfc_nvmet_ctxbuf *ctx_buf)
2177 {
2178 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2179         struct lpfc_async_xchg_ctx *ctxp = ctx_buf->context;
2180         struct lpfc_hba *phba = ctxp->phba;
2181         struct rqb_dmabuf *nvmebuf = ctxp->rqb_buffer;
2182         struct lpfc_nvmet_tgtport *tgtp;
2183         uint32_t *payload, qno;
2184         uint32_t rc;
2185         unsigned long iflags;
2186
2187         if (!nvmebuf) {
2188                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2189                         "6159 process_rcv_fcp_req, nvmebuf is NULL, "
2190                         "oxid: x%x flg: x%x state: x%x\n",
2191                         ctxp->oxid, ctxp->flag, ctxp->state);
2192                 spin_lock_irqsave(&ctxp->ctxlock, iflags);
2193                 lpfc_nvmet_defer_release(phba, ctxp);
2194                 spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2195                 lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid,
2196                                                  ctxp->oxid);
2197                 return;
2198         }
2199
2200         if (ctxp->flag & LPFC_NVME_ABTS_RCV) {
2201                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2202                                 "6324 IO oxid x%x aborted\n",
2203                                 ctxp->oxid);
2204                 return;
2205         }
2206
2207         payload = (uint32_t *)(nvmebuf->dbuf.virt);
2208         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2209         ctxp->flag |= LPFC_NVME_TNOTIFY;
2210 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2211         if (ctxp->ts_isr_cmd)
2212                 ctxp->ts_cmd_nvme = ktime_get_ns();
2213 #endif
2214         /*
2215          * The calling sequence should be:
2216          * nvmet_fc_rcv_fcp_req->lpfc_nvmet_xmt_fcp_op/cmp- req->done
2217          * lpfc_nvmet_xmt_fcp_op_cmp should free the allocated ctxp.
2218          * When we return from nvmet_fc_rcv_fcp_req, all relevant info
2219          * the NVME command / FC header is stored.
2220          * A buffer has already been reposted for this IO, so just free
2221          * the nvmebuf.
2222          */
2223         rc = nvmet_fc_rcv_fcp_req(phba->targetport, &ctxp->hdlrctx.fcp_req,
2224                                   payload, ctxp->size);
2225         /* Process FCP command */
2226         if (rc == 0) {
2227                 atomic_inc(&tgtp->rcv_fcp_cmd_out);
2228                 spin_lock_irqsave(&ctxp->ctxlock, iflags);
2229                 if ((ctxp->flag & LPFC_NVME_CTX_REUSE_WQ) ||
2230                     (nvmebuf != ctxp->rqb_buffer)) {
2231                         spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2232                         return;
2233                 }
2234                 ctxp->rqb_buffer = NULL;
2235                 spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2236                 lpfc_rq_buf_free(phba, &nvmebuf->hbuf); /* repost */
2237                 return;
2238         }
2239
2240         /* Processing of FCP command is deferred */
2241         if (rc == -EOVERFLOW) {
2242                 lpfc_nvmeio_data(phba, "NVMET RCV BUSY: xri x%x sz %d "
2243                                  "from %06x\n",
2244                                  ctxp->oxid, ctxp->size, ctxp->sid);
2245                 atomic_inc(&tgtp->rcv_fcp_cmd_out);
2246                 atomic_inc(&tgtp->defer_fod);
2247                 spin_lock_irqsave(&ctxp->ctxlock, iflags);
2248                 if (ctxp->flag & LPFC_NVME_CTX_REUSE_WQ) {
2249                         spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2250                         return;
2251                 }
2252                 spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2253                 /*
2254                  * Post a replacement DMA buffer to RQ and defer
2255                  * freeing rcv buffer till .defer_rcv callback
2256                  */
2257                 qno = nvmebuf->idx;
2258                 lpfc_post_rq_buffer(
2259                         phba, phba->sli4_hba.nvmet_mrq_hdr[qno],
2260                         phba->sli4_hba.nvmet_mrq_data[qno], 1, qno);
2261                 return;
2262         }
2263         ctxp->flag &= ~LPFC_NVME_TNOTIFY;
2264         atomic_inc(&tgtp->rcv_fcp_cmd_drop);
2265         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2266                         "2582 FCP Drop IO x%x: err x%x: x%x x%x x%x\n",
2267                         ctxp->oxid, rc,
2268                         atomic_read(&tgtp->rcv_fcp_cmd_in),
2269                         atomic_read(&tgtp->rcv_fcp_cmd_out),
2270                         atomic_read(&tgtp->xmt_fcp_release));
2271         lpfc_nvmeio_data(phba, "NVMET FCP DROP: xri x%x sz %d from %06x\n",
2272                          ctxp->oxid, ctxp->size, ctxp->sid);
2273         spin_lock_irqsave(&ctxp->ctxlock, iflags);
2274         lpfc_nvmet_defer_release(phba, ctxp);
2275         spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2276         lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid, ctxp->oxid);
2277 #endif
2278 }
2279
2280 static void
2281 lpfc_nvmet_fcp_rqst_defer_work(struct work_struct *work)
2282 {
2283 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2284         struct lpfc_nvmet_ctxbuf *ctx_buf =
2285                 container_of(work, struct lpfc_nvmet_ctxbuf, defer_work);
2286
2287         lpfc_nvmet_process_rcv_fcp_req(ctx_buf);
2288 #endif
2289 }
2290
2291 static struct lpfc_nvmet_ctxbuf *
2292 lpfc_nvmet_replenish_context(struct lpfc_hba *phba,
2293                              struct lpfc_nvmet_ctx_info *current_infop)
2294 {
2295 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2296         struct lpfc_nvmet_ctxbuf *ctx_buf = NULL;
2297         struct lpfc_nvmet_ctx_info *get_infop;
2298         int i;
2299
2300         /*
2301          * The current_infop for the MRQ a NVME command IU was received
2302          * on is empty. Our goal is to replenish this MRQs context
2303          * list from a another CPUs.
2304          *
2305          * First we need to pick a context list to start looking on.
2306          * nvmet_ctx_start_cpu has available context the last time
2307          * we needed to replenish this CPU where nvmet_ctx_next_cpu
2308          * is just the next sequential CPU for this MRQ.
2309          */
2310         if (current_infop->nvmet_ctx_start_cpu)
2311                 get_infop = current_infop->nvmet_ctx_start_cpu;
2312         else
2313                 get_infop = current_infop->nvmet_ctx_next_cpu;
2314
2315         for (i = 0; i < phba->sli4_hba.num_possible_cpu; i++) {
2316                 if (get_infop == current_infop) {
2317                         get_infop = get_infop->nvmet_ctx_next_cpu;
2318                         continue;
2319                 }
2320                 spin_lock(&get_infop->nvmet_ctx_list_lock);
2321
2322                 /* Just take the entire context list, if there are any */
2323                 if (get_infop->nvmet_ctx_list_cnt) {
2324                         list_splice_init(&get_infop->nvmet_ctx_list,
2325                                     &current_infop->nvmet_ctx_list);
2326                         current_infop->nvmet_ctx_list_cnt =
2327                                 get_infop->nvmet_ctx_list_cnt - 1;
2328                         get_infop->nvmet_ctx_list_cnt = 0;
2329                         spin_unlock(&get_infop->nvmet_ctx_list_lock);
2330
2331                         current_infop->nvmet_ctx_start_cpu = get_infop;
2332                         list_remove_head(&current_infop->nvmet_ctx_list,
2333                                          ctx_buf, struct lpfc_nvmet_ctxbuf,
2334                                          list);
2335                         return ctx_buf;
2336                 }
2337
2338                 /* Otherwise, move on to the next CPU for this MRQ */
2339                 spin_unlock(&get_infop->nvmet_ctx_list_lock);
2340                 get_infop = get_infop->nvmet_ctx_next_cpu;
2341         }
2342
2343 #endif
2344         /* Nothing found, all contexts for the MRQ are in-flight */
2345         return NULL;
2346 }
2347
2348 /**
2349  * lpfc_nvmet_unsol_fcp_buffer - Process an unsolicited event data buffer
2350  * @phba: pointer to lpfc hba data structure.
2351  * @idx: relative index of MRQ vector
2352  * @nvmebuf: pointer to lpfc nvme command HBQ data structure.
2353  * @isr_timestamp: in jiffies.
2354  * @cqflag: cq processing information regarding workload.
2355  *
2356  * This routine is used for processing the WQE associated with a unsolicited
2357  * event. It first determines whether there is an existing ndlp that matches
2358  * the DID from the unsolicited WQE. If not, it will create a new one with
2359  * the DID from the unsolicited WQE. The ELS command from the unsolicited
2360  * WQE is then used to invoke the proper routine and to set up proper state
2361  * of the discovery state machine.
2362  **/
2363 static void
2364 lpfc_nvmet_unsol_fcp_buffer(struct lpfc_hba *phba,
2365                             uint32_t idx,
2366                             struct rqb_dmabuf *nvmebuf,
2367                             uint64_t isr_timestamp,
2368                             uint8_t cqflag)
2369 {
2370         struct lpfc_async_xchg_ctx *ctxp;
2371         struct lpfc_nvmet_tgtport *tgtp;
2372         struct fc_frame_header *fc_hdr;
2373         struct lpfc_nvmet_ctxbuf *ctx_buf;
2374         struct lpfc_nvmet_ctx_info *current_infop;
2375         uint32_t size, oxid, sid, qno;
2376         unsigned long iflag;
2377         int current_cpu;
2378
2379         if (!IS_ENABLED(CONFIG_NVME_TARGET_FC))
2380                 return;
2381
2382         ctx_buf = NULL;
2383         if (!nvmebuf || !phba->targetport) {
2384                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2385                                 "6157 NVMET FCP Drop IO\n");
2386                 if (nvmebuf)
2387                         lpfc_rq_buf_free(phba, &nvmebuf->hbuf);
2388                 return;
2389         }
2390
2391         /*
2392          * Get a pointer to the context list for this MRQ based on
2393          * the CPU this MRQ IRQ is associated with. If the CPU association
2394          * changes from our initial assumption, the context list could
2395          * be empty, thus it would need to be replenished with the
2396          * context list from another CPU for this MRQ.
2397          */
2398         current_cpu = raw_smp_processor_id();
2399         current_infop = lpfc_get_ctx_list(phba, current_cpu, idx);
2400         spin_lock_irqsave(&current_infop->nvmet_ctx_list_lock, iflag);
2401         if (current_infop->nvmet_ctx_list_cnt) {
2402                 list_remove_head(&current_infop->nvmet_ctx_list,
2403                                  ctx_buf, struct lpfc_nvmet_ctxbuf, list);
2404                 current_infop->nvmet_ctx_list_cnt--;
2405         } else {
2406                 ctx_buf = lpfc_nvmet_replenish_context(phba, current_infop);
2407         }
2408         spin_unlock_irqrestore(&current_infop->nvmet_ctx_list_lock, iflag);
2409
2410         fc_hdr = (struct fc_frame_header *)(nvmebuf->hbuf.virt);
2411         oxid = be16_to_cpu(fc_hdr->fh_ox_id);
2412         size = nvmebuf->bytes_recv;
2413
2414 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2415         if (phba->hdwqstat_on & LPFC_CHECK_NVMET_IO) {
2416                 this_cpu_inc(phba->sli4_hba.c_stat->rcv_io);
2417                 if (idx != current_cpu)
2418                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
2419                                         "6703 CPU Check rcv: "
2420                                         "cpu %d expect %d\n",
2421                                         current_cpu, idx);
2422         }
2423 #endif
2424
2425         lpfc_nvmeio_data(phba, "NVMET FCP  RCV: xri x%x sz %d CPU %02x\n",
2426                          oxid, size, raw_smp_processor_id());
2427
2428         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2429
2430         if (!ctx_buf) {
2431                 /* Queue this NVME IO to process later */
2432                 spin_lock_irqsave(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
2433                 list_add_tail(&nvmebuf->hbuf.list,
2434                               &phba->sli4_hba.lpfc_nvmet_io_wait_list);
2435                 phba->sli4_hba.nvmet_io_wait_cnt++;
2436                 phba->sli4_hba.nvmet_io_wait_total++;
2437                 spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock,
2438                                        iflag);
2439
2440                 /* Post a brand new DMA buffer to RQ */
2441                 qno = nvmebuf->idx;
2442                 lpfc_post_rq_buffer(
2443                         phba, phba->sli4_hba.nvmet_mrq_hdr[qno],
2444                         phba->sli4_hba.nvmet_mrq_data[qno], 1, qno);
2445
2446                 atomic_inc(&tgtp->defer_ctx);
2447                 return;
2448         }
2449
2450         sid = sli4_sid_from_fc_hdr(fc_hdr);
2451
2452         ctxp = (struct lpfc_async_xchg_ctx *)ctx_buf->context;
2453         spin_lock_irqsave(&phba->sli4_hba.t_active_list_lock, iflag);
2454         list_add_tail(&ctxp->list, &phba->sli4_hba.t_active_ctx_list);
2455         spin_unlock_irqrestore(&phba->sli4_hba.t_active_list_lock, iflag);
2456         if (ctxp->state != LPFC_NVME_STE_FREE) {
2457                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2458                                 "6414 NVMET Context corrupt %d %d oxid x%x\n",
2459                                 ctxp->state, ctxp->entry_cnt, ctxp->oxid);
2460         }
2461         ctxp->wqeq = NULL;
2462         ctxp->offset = 0;
2463         ctxp->phba = phba;
2464         ctxp->size = size;
2465         ctxp->oxid = oxid;
2466         ctxp->sid = sid;
2467         ctxp->idx = idx;
2468         ctxp->state = LPFC_NVME_STE_RCV;
2469         ctxp->entry_cnt = 1;
2470         ctxp->flag = 0;
2471         ctxp->ctxbuf = ctx_buf;
2472         ctxp->rqb_buffer = (void *)nvmebuf;
2473         ctxp->hdwq = NULL;
2474         spin_lock_init(&ctxp->ctxlock);
2475
2476 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2477         if (isr_timestamp)
2478                 ctxp->ts_isr_cmd = isr_timestamp;
2479         ctxp->ts_cmd_nvme = 0;
2480         ctxp->ts_nvme_data = 0;
2481         ctxp->ts_data_wqput = 0;
2482         ctxp->ts_isr_data = 0;
2483         ctxp->ts_data_nvme = 0;
2484         ctxp->ts_nvme_status = 0;
2485         ctxp->ts_status_wqput = 0;
2486         ctxp->ts_isr_status = 0;
2487         ctxp->ts_status_nvme = 0;
2488 #endif
2489
2490         atomic_inc(&tgtp->rcv_fcp_cmd_in);
2491         /* check for cq processing load */
2492         if (!cqflag) {
2493                 lpfc_nvmet_process_rcv_fcp_req(ctx_buf);
2494                 return;
2495         }
2496
2497         if (!queue_work(phba->wq, &ctx_buf->defer_work)) {
2498                 atomic_inc(&tgtp->rcv_fcp_cmd_drop);
2499                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2500                                 "6325 Unable to queue work for oxid x%x. "
2501                                 "FCP Drop IO [x%x x%x x%x]\n",
2502                                 ctxp->oxid,
2503                                 atomic_read(&tgtp->rcv_fcp_cmd_in),
2504                                 atomic_read(&tgtp->rcv_fcp_cmd_out),
2505                                 atomic_read(&tgtp->xmt_fcp_release));
2506
2507                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
2508                 lpfc_nvmet_defer_release(phba, ctxp);
2509                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
2510                 lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, sid, oxid);
2511         }
2512 }
2513
2514 /**
2515  * lpfc_nvmet_unsol_fcp_event - Process an unsolicited event from an nvme nport
2516  * @phba: pointer to lpfc hba data structure.
2517  * @idx: relative index of MRQ vector
2518  * @nvmebuf: pointer to received nvme data structure.
2519  * @isr_timestamp: in jiffies.
2520  * @cqflag: cq processing information regarding workload.
2521  *
2522  * This routine is used to process an unsolicited event received from a SLI
2523  * (Service Level Interface) ring. The actual processing of the data buffer
2524  * associated with the unsolicited event is done by invoking the routine
2525  * lpfc_nvmet_unsol_fcp_buffer() after properly set up the buffer from the
2526  * SLI RQ on which the unsolicited event was received.
2527  **/
2528 void
2529 lpfc_nvmet_unsol_fcp_event(struct lpfc_hba *phba,
2530                            uint32_t idx,
2531                            struct rqb_dmabuf *nvmebuf,
2532                            uint64_t isr_timestamp,
2533                            uint8_t cqflag)
2534 {
2535         if (!nvmebuf) {
2536                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2537                                 "3167 NVMET FCP Drop IO\n");
2538                 return;
2539         }
2540         if (phba->nvmet_support == 0) {
2541                 lpfc_rq_buf_free(phba, &nvmebuf->hbuf);
2542                 return;
2543         }
2544         lpfc_nvmet_unsol_fcp_buffer(phba, idx, nvmebuf, isr_timestamp, cqflag);
2545 }
2546
2547 /**
2548  * lpfc_nvmet_prep_ls_wqe - Allocate and prepare a lpfc wqe data structure
2549  * @phba: pointer to a host N_Port data structure.
2550  * @ctxp: Context info for NVME LS Request
2551  * @rspbuf: DMA buffer of NVME command.
2552  * @rspsize: size of the NVME command.
2553  *
2554  * This routine is used for allocating a lpfc-WQE data structure from
2555  * the driver lpfc-WQE free-list and prepare the WQE with the parameters
2556  * passed into the routine for discovery state machine to issue an Extended
2557  * Link Service (NVME) commands. It is a generic lpfc-WQE allocation
2558  * and preparation routine that is used by all the discovery state machine
2559  * routines and the NVME command-specific fields will be later set up by
2560  * the individual discovery machine routines after calling this routine
2561  * allocating and preparing a generic WQE data structure. It fills in the
2562  * Buffer Descriptor Entries (BDEs), allocates buffers for both command
2563  * payload and response payload (if expected). The reference count on the
2564  * ndlp is incremented by 1 and the reference to the ndlp is put into
2565  * context1 of the WQE data structure for this WQE to hold the ndlp
2566  * reference for the command's callback function to access later.
2567  *
2568  * Return code
2569  *   Pointer to the newly allocated/prepared nvme wqe data structure
2570  *   NULL - when nvme wqe data structure allocation/preparation failed
2571  **/
2572 static struct lpfc_iocbq *
2573 lpfc_nvmet_prep_ls_wqe(struct lpfc_hba *phba,
2574                        struct lpfc_async_xchg_ctx *ctxp,
2575                        dma_addr_t rspbuf, uint16_t rspsize)
2576 {
2577         struct lpfc_nodelist *ndlp;
2578         struct lpfc_iocbq *nvmewqe;
2579         union lpfc_wqe128 *wqe;
2580
2581         if (!lpfc_is_link_up(phba)) {
2582                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2583                                 "6104 NVMET prep LS wqe: link err: "
2584                                 "NPORT x%x oxid:x%x ste %d\n",
2585                                 ctxp->sid, ctxp->oxid, ctxp->state);
2586                 return NULL;
2587         }
2588
2589         /* Allocate buffer for  command wqe */
2590         nvmewqe = lpfc_sli_get_iocbq(phba);
2591         if (nvmewqe == NULL) {
2592                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2593                                 "6105 NVMET prep LS wqe: No WQE: "
2594                                 "NPORT x%x oxid x%x ste %d\n",
2595                                 ctxp->sid, ctxp->oxid, ctxp->state);
2596                 return NULL;
2597         }
2598
2599         ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
2600         if (!ndlp ||
2601             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
2602             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
2603                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2604                                 "6106 NVMET prep LS wqe: No ndlp: "
2605                                 "NPORT x%x oxid x%x ste %d\n",
2606                                 ctxp->sid, ctxp->oxid, ctxp->state);
2607                 goto nvme_wqe_free_wqeq_exit;
2608         }
2609         ctxp->wqeq = nvmewqe;
2610
2611         /* prevent preparing wqe with NULL ndlp reference */
2612         nvmewqe->context1 = lpfc_nlp_get(ndlp);
2613         if (nvmewqe->context1 == NULL)
2614                 goto nvme_wqe_free_wqeq_exit;
2615         nvmewqe->context2 = ctxp;
2616
2617         wqe = &nvmewqe->wqe;
2618         memset(wqe, 0, sizeof(union lpfc_wqe));
2619
2620         /* Words 0 - 2 */
2621         wqe->xmit_sequence.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2622         wqe->xmit_sequence.bde.tus.f.bdeSize = rspsize;
2623         wqe->xmit_sequence.bde.addrLow = le32_to_cpu(putPaddrLow(rspbuf));
2624         wqe->xmit_sequence.bde.addrHigh = le32_to_cpu(putPaddrHigh(rspbuf));
2625
2626         /* Word 3 */
2627
2628         /* Word 4 */
2629
2630         /* Word 5 */
2631         bf_set(wqe_dfctl, &wqe->xmit_sequence.wge_ctl, 0);
2632         bf_set(wqe_ls, &wqe->xmit_sequence.wge_ctl, 1);
2633         bf_set(wqe_la, &wqe->xmit_sequence.wge_ctl, 0);
2634         bf_set(wqe_rctl, &wqe->xmit_sequence.wge_ctl, FC_RCTL_ELS4_REP);
2635         bf_set(wqe_type, &wqe->xmit_sequence.wge_ctl, FC_TYPE_NVME);
2636
2637         /* Word 6 */
2638         bf_set(wqe_ctxt_tag, &wqe->xmit_sequence.wqe_com,
2639                phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2640         bf_set(wqe_xri_tag, &wqe->xmit_sequence.wqe_com, nvmewqe->sli4_xritag);
2641
2642         /* Word 7 */
2643         bf_set(wqe_cmnd, &wqe->xmit_sequence.wqe_com,
2644                CMD_XMIT_SEQUENCE64_WQE);
2645         bf_set(wqe_ct, &wqe->xmit_sequence.wqe_com, SLI4_CT_RPI);
2646         bf_set(wqe_class, &wqe->xmit_sequence.wqe_com, CLASS3);
2647         bf_set(wqe_pu, &wqe->xmit_sequence.wqe_com, 0);
2648
2649         /* Word 8 */
2650         wqe->xmit_sequence.wqe_com.abort_tag = nvmewqe->iotag;
2651
2652         /* Word 9 */
2653         bf_set(wqe_reqtag, &wqe->xmit_sequence.wqe_com, nvmewqe->iotag);
2654         /* Needs to be set by caller */
2655         bf_set(wqe_rcvoxid, &wqe->xmit_sequence.wqe_com, ctxp->oxid);
2656
2657         /* Word 10 */
2658         bf_set(wqe_dbde, &wqe->xmit_sequence.wqe_com, 1);
2659         bf_set(wqe_iod, &wqe->xmit_sequence.wqe_com, LPFC_WQE_IOD_WRITE);
2660         bf_set(wqe_lenloc, &wqe->xmit_sequence.wqe_com,
2661                LPFC_WQE_LENLOC_WORD12);
2662         bf_set(wqe_ebde_cnt, &wqe->xmit_sequence.wqe_com, 0);
2663
2664         /* Word 11 */
2665         bf_set(wqe_cqid, &wqe->xmit_sequence.wqe_com,
2666                LPFC_WQE_CQ_ID_DEFAULT);
2667         bf_set(wqe_cmd_type, &wqe->xmit_sequence.wqe_com,
2668                OTHER_COMMAND);
2669
2670         /* Word 12 */
2671         wqe->xmit_sequence.xmit_len = rspsize;
2672
2673         nvmewqe->retry = 1;
2674         nvmewqe->vport = phba->pport;
2675         nvmewqe->drvrTimeout = (phba->fc_ratov * 3) + LPFC_DRVR_TIMEOUT;
2676         nvmewqe->iocb_flag |= LPFC_IO_NVME_LS;
2677
2678         /* Xmit NVMET response to remote NPORT <did> */
2679         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
2680                         "6039 Xmit NVMET LS response to remote "
2681                         "NPORT x%x iotag:x%x oxid:x%x size:x%x\n",
2682                         ndlp->nlp_DID, nvmewqe->iotag, ctxp->oxid,
2683                         rspsize);
2684         return nvmewqe;
2685
2686 nvme_wqe_free_wqeq_exit:
2687         nvmewqe->context2 = NULL;
2688         nvmewqe->context3 = NULL;
2689         lpfc_sli_release_iocbq(phba, nvmewqe);
2690         return NULL;
2691 }
2692
2693
2694 static struct lpfc_iocbq *
2695 lpfc_nvmet_prep_fcp_wqe(struct lpfc_hba *phba,
2696                         struct lpfc_async_xchg_ctx *ctxp)
2697 {
2698         struct nvmefc_tgt_fcp_req *rsp = &ctxp->hdlrctx.fcp_req;
2699         struct lpfc_nvmet_tgtport *tgtp;
2700         struct sli4_sge *sgl;
2701         struct lpfc_nodelist *ndlp;
2702         struct lpfc_iocbq *nvmewqe;
2703         struct scatterlist *sgel;
2704         union lpfc_wqe128 *wqe;
2705         struct ulp_bde64 *bde;
2706         dma_addr_t physaddr;
2707         int i, cnt, nsegs;
2708         int do_pbde;
2709         int xc = 1;
2710
2711         if (!lpfc_is_link_up(phba)) {
2712                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2713                                 "6107 NVMET prep FCP wqe: link err:"
2714                                 "NPORT x%x oxid x%x ste %d\n",
2715                                 ctxp->sid, ctxp->oxid, ctxp->state);
2716                 return NULL;
2717         }
2718
2719         ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
2720         if (!ndlp ||
2721             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
2722              (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
2723                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2724                                 "6108 NVMET prep FCP wqe: no ndlp: "
2725                                 "NPORT x%x oxid x%x ste %d\n",
2726                                 ctxp->sid, ctxp->oxid, ctxp->state);
2727                 return NULL;
2728         }
2729
2730         if (rsp->sg_cnt > lpfc_tgttemplate.max_sgl_segments) {
2731                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2732                                 "6109 NVMET prep FCP wqe: seg cnt err: "
2733                                 "NPORT x%x oxid x%x ste %d cnt %d\n",
2734                                 ctxp->sid, ctxp->oxid, ctxp->state,
2735                                 phba->cfg_nvme_seg_cnt);
2736                 return NULL;
2737         }
2738         nsegs = rsp->sg_cnt;
2739
2740         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2741         nvmewqe = ctxp->wqeq;
2742         if (nvmewqe == NULL) {
2743                 /* Allocate buffer for  command wqe */
2744                 nvmewqe = ctxp->ctxbuf->iocbq;
2745                 if (nvmewqe == NULL) {
2746                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2747                                         "6110 NVMET prep FCP wqe: No "
2748                                         "WQE: NPORT x%x oxid x%x ste %d\n",
2749                                         ctxp->sid, ctxp->oxid, ctxp->state);
2750                         return NULL;
2751                 }
2752                 ctxp->wqeq = nvmewqe;
2753                 xc = 0; /* create new XRI */
2754                 nvmewqe->sli4_lxritag = NO_XRI;
2755                 nvmewqe->sli4_xritag = NO_XRI;
2756         }
2757
2758         /* Sanity check */
2759         if (((ctxp->state == LPFC_NVME_STE_RCV) &&
2760             (ctxp->entry_cnt == 1)) ||
2761             (ctxp->state == LPFC_NVME_STE_DATA)) {
2762                 wqe = &nvmewqe->wqe;
2763         } else {
2764                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2765                                 "6111 Wrong state NVMET FCP: %d  cnt %d\n",
2766                                 ctxp->state, ctxp->entry_cnt);
2767                 return NULL;
2768         }
2769
2770         sgl  = (struct sli4_sge *)ctxp->ctxbuf->sglq->sgl;
2771         switch (rsp->op) {
2772         case NVMET_FCOP_READDATA:
2773         case NVMET_FCOP_READDATA_RSP:
2774                 /* From the tsend template, initialize words 7 - 11 */
2775                 memcpy(&wqe->words[7],
2776                        &lpfc_tsend_cmd_template.words[7],
2777                        sizeof(uint32_t) * 5);
2778
2779                 /* Words 0 - 2 : The first sg segment */
2780                 sgel = &rsp->sg[0];
2781                 physaddr = sg_dma_address(sgel);
2782                 wqe->fcp_tsend.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2783                 wqe->fcp_tsend.bde.tus.f.bdeSize = sg_dma_len(sgel);
2784                 wqe->fcp_tsend.bde.addrLow = cpu_to_le32(putPaddrLow(physaddr));
2785                 wqe->fcp_tsend.bde.addrHigh =
2786                         cpu_to_le32(putPaddrHigh(physaddr));
2787
2788                 /* Word 3 */
2789                 wqe->fcp_tsend.payload_offset_len = 0;
2790
2791                 /* Word 4 */
2792                 wqe->fcp_tsend.relative_offset = ctxp->offset;
2793
2794                 /* Word 5 */
2795                 wqe->fcp_tsend.reserved = 0;
2796
2797                 /* Word 6 */
2798                 bf_set(wqe_ctxt_tag, &wqe->fcp_tsend.wqe_com,
2799                        phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2800                 bf_set(wqe_xri_tag, &wqe->fcp_tsend.wqe_com,
2801                        nvmewqe->sli4_xritag);
2802
2803                 /* Word 7 - set ar later */
2804
2805                 /* Word 8 */
2806                 wqe->fcp_tsend.wqe_com.abort_tag = nvmewqe->iotag;
2807
2808                 /* Word 9 */
2809                 bf_set(wqe_reqtag, &wqe->fcp_tsend.wqe_com, nvmewqe->iotag);
2810                 bf_set(wqe_rcvoxid, &wqe->fcp_tsend.wqe_com, ctxp->oxid);
2811
2812                 /* Word 10 - set wqes later, in template xc=1 */
2813                 if (!xc)
2814                         bf_set(wqe_xc, &wqe->fcp_tsend.wqe_com, 0);
2815
2816                 /* Word 11 - set sup, irsp, irsplen later */
2817                 do_pbde = 0;
2818
2819                 /* Word 12 */
2820                 wqe->fcp_tsend.fcp_data_len = rsp->transfer_length;
2821
2822                 /* Setup 2 SKIP SGEs */
2823                 sgl->addr_hi = 0;
2824                 sgl->addr_lo = 0;
2825                 sgl->word2 = 0;
2826                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2827                 sgl->word2 = cpu_to_le32(sgl->word2);
2828                 sgl->sge_len = 0;
2829                 sgl++;
2830                 sgl->addr_hi = 0;
2831                 sgl->addr_lo = 0;
2832                 sgl->word2 = 0;
2833                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2834                 sgl->word2 = cpu_to_le32(sgl->word2);
2835                 sgl->sge_len = 0;
2836                 sgl++;
2837                 if (rsp->op == NVMET_FCOP_READDATA_RSP) {
2838                         atomic_inc(&tgtp->xmt_fcp_read_rsp);
2839
2840                         /* In template ar=1 wqes=0 sup=0 irsp=0 irsplen=0 */
2841
2842                         if (rsp->rsplen == LPFC_NVMET_SUCCESS_LEN) {
2843                                 if (ndlp->nlp_flag & NLP_SUPPRESS_RSP)
2844                                         bf_set(wqe_sup,
2845                                                &wqe->fcp_tsend.wqe_com, 1);
2846                         } else {
2847                                 bf_set(wqe_wqes, &wqe->fcp_tsend.wqe_com, 1);
2848                                 bf_set(wqe_irsp, &wqe->fcp_tsend.wqe_com, 1);
2849                                 bf_set(wqe_irsplen, &wqe->fcp_tsend.wqe_com,
2850                                        ((rsp->rsplen >> 2) - 1));
2851                                 memcpy(&wqe->words[16], rsp->rspaddr,
2852                                        rsp->rsplen);
2853                         }
2854                 } else {
2855                         atomic_inc(&tgtp->xmt_fcp_read);
2856
2857                         /* In template ar=1 wqes=0 sup=0 irsp=0 irsplen=0 */
2858                         bf_set(wqe_ar, &wqe->fcp_tsend.wqe_com, 0);
2859                 }
2860                 break;
2861
2862         case NVMET_FCOP_WRITEDATA:
2863                 /* From the treceive template, initialize words 3 - 11 */
2864                 memcpy(&wqe->words[3],
2865                        &lpfc_treceive_cmd_template.words[3],
2866                        sizeof(uint32_t) * 9);
2867
2868                 /* Words 0 - 2 : First SGE is skipped, set invalid BDE type */
2869                 wqe->fcp_treceive.bde.tus.f.bdeFlags = LPFC_SGE_TYPE_SKIP;
2870                 wqe->fcp_treceive.bde.tus.f.bdeSize = 0;
2871                 wqe->fcp_treceive.bde.addrLow = 0;
2872                 wqe->fcp_treceive.bde.addrHigh = 0;
2873
2874                 /* Word 4 */
2875                 wqe->fcp_treceive.relative_offset = ctxp->offset;
2876
2877                 /* Word 6 */
2878                 bf_set(wqe_ctxt_tag, &wqe->fcp_treceive.wqe_com,
2879                        phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2880                 bf_set(wqe_xri_tag, &wqe->fcp_treceive.wqe_com,
2881                        nvmewqe->sli4_xritag);
2882
2883                 /* Word 7 */
2884
2885                 /* Word 8 */
2886                 wqe->fcp_treceive.wqe_com.abort_tag = nvmewqe->iotag;
2887
2888                 /* Word 9 */
2889                 bf_set(wqe_reqtag, &wqe->fcp_treceive.wqe_com, nvmewqe->iotag);
2890                 bf_set(wqe_rcvoxid, &wqe->fcp_treceive.wqe_com, ctxp->oxid);
2891
2892                 /* Word 10 - in template xc=1 */
2893                 if (!xc)
2894                         bf_set(wqe_xc, &wqe->fcp_treceive.wqe_com, 0);
2895
2896                 /* Word 11 - set pbde later */
2897                 if (phba->cfg_enable_pbde) {
2898                         do_pbde = 1;
2899                 } else {
2900                         bf_set(wqe_pbde, &wqe->fcp_treceive.wqe_com, 0);
2901                         do_pbde = 0;
2902                 }
2903
2904                 /* Word 12 */
2905                 wqe->fcp_tsend.fcp_data_len = rsp->transfer_length;
2906
2907                 /* Setup 2 SKIP SGEs */
2908                 sgl->addr_hi = 0;
2909                 sgl->addr_lo = 0;
2910                 sgl->word2 = 0;
2911                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2912                 sgl->word2 = cpu_to_le32(sgl->word2);
2913                 sgl->sge_len = 0;
2914                 sgl++;
2915                 sgl->addr_hi = 0;
2916                 sgl->addr_lo = 0;
2917                 sgl->word2 = 0;
2918                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2919                 sgl->word2 = cpu_to_le32(sgl->word2);
2920                 sgl->sge_len = 0;
2921                 sgl++;
2922                 atomic_inc(&tgtp->xmt_fcp_write);
2923                 break;
2924
2925         case NVMET_FCOP_RSP:
2926                 /* From the treceive template, initialize words 4 - 11 */
2927                 memcpy(&wqe->words[4],
2928                        &lpfc_trsp_cmd_template.words[4],
2929                        sizeof(uint32_t) * 8);
2930
2931                 /* Words 0 - 2 */
2932                 physaddr = rsp->rspdma;
2933                 wqe->fcp_trsp.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2934                 wqe->fcp_trsp.bde.tus.f.bdeSize = rsp->rsplen;
2935                 wqe->fcp_trsp.bde.addrLow =
2936                         cpu_to_le32(putPaddrLow(physaddr));
2937                 wqe->fcp_trsp.bde.addrHigh =
2938                         cpu_to_le32(putPaddrHigh(physaddr));
2939
2940                 /* Word 3 */
2941                 wqe->fcp_trsp.response_len = rsp->rsplen;
2942
2943                 /* Word 6 */
2944                 bf_set(wqe_ctxt_tag, &wqe->fcp_trsp.wqe_com,
2945                        phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2946                 bf_set(wqe_xri_tag, &wqe->fcp_trsp.wqe_com,
2947                        nvmewqe->sli4_xritag);
2948
2949                 /* Word 7 */
2950
2951                 /* Word 8 */
2952                 wqe->fcp_trsp.wqe_com.abort_tag = nvmewqe->iotag;
2953
2954                 /* Word 9 */
2955                 bf_set(wqe_reqtag, &wqe->fcp_trsp.wqe_com, nvmewqe->iotag);
2956                 bf_set(wqe_rcvoxid, &wqe->fcp_trsp.wqe_com, ctxp->oxid);
2957
2958                 /* Word 10 */
2959                 if (xc)
2960                         bf_set(wqe_xc, &wqe->fcp_trsp.wqe_com, 1);
2961
2962                 /* Word 11 */
2963                 /* In template wqes=0 irsp=0 irsplen=0 - good response */
2964                 if (rsp->rsplen != LPFC_NVMET_SUCCESS_LEN) {
2965                         /* Bad response - embed it */
2966                         bf_set(wqe_wqes, &wqe->fcp_trsp.wqe_com, 1);
2967                         bf_set(wqe_irsp, &wqe->fcp_trsp.wqe_com, 1);
2968                         bf_set(wqe_irsplen, &wqe->fcp_trsp.wqe_com,
2969                                ((rsp->rsplen >> 2) - 1));
2970                         memcpy(&wqe->words[16], rsp->rspaddr, rsp->rsplen);
2971                 }
2972                 do_pbde = 0;
2973
2974                 /* Word 12 */
2975                 wqe->fcp_trsp.rsvd_12_15[0] = 0;
2976
2977                 /* Use rspbuf, NOT sg list */
2978                 nsegs = 0;
2979                 sgl->word2 = 0;
2980                 atomic_inc(&tgtp->xmt_fcp_rsp);
2981                 break;
2982
2983         default:
2984                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
2985                                 "6064 Unknown Rsp Op %d\n",
2986                                 rsp->op);
2987                 return NULL;
2988         }
2989
2990         nvmewqe->retry = 1;
2991         nvmewqe->vport = phba->pport;
2992         nvmewqe->drvrTimeout = (phba->fc_ratov * 3) + LPFC_DRVR_TIMEOUT;
2993         nvmewqe->context1 = ndlp;
2994
2995         for_each_sg(rsp->sg, sgel, nsegs, i) {
2996                 physaddr = sg_dma_address(sgel);
2997                 cnt = sg_dma_len(sgel);
2998                 sgl->addr_hi = putPaddrHigh(physaddr);
2999                 sgl->addr_lo = putPaddrLow(physaddr);
3000                 sgl->word2 = 0;
3001                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
3002                 bf_set(lpfc_sli4_sge_offset, sgl, ctxp->offset);
3003                 if ((i+1) == rsp->sg_cnt)
3004                         bf_set(lpfc_sli4_sge_last, sgl, 1);
3005                 sgl->word2 = cpu_to_le32(sgl->word2);
3006                 sgl->sge_len = cpu_to_le32(cnt);
3007                 if (i == 0) {
3008                         bde = (struct ulp_bde64 *)&wqe->words[13];
3009                         if (do_pbde) {
3010                                 /* Words 13-15  (PBDE) */
3011                                 bde->addrLow = sgl->addr_lo;
3012                                 bde->addrHigh = sgl->addr_hi;
3013                                 bde->tus.f.bdeSize =
3014                                         le32_to_cpu(sgl->sge_len);
3015                                 bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
3016                                 bde->tus.w = cpu_to_le32(bde->tus.w);
3017                         } else {
3018                                 memset(bde, 0, sizeof(struct ulp_bde64));
3019                         }
3020                 }
3021                 sgl++;
3022                 ctxp->offset += cnt;
3023         }
3024         ctxp->state = LPFC_NVME_STE_DATA;
3025         ctxp->entry_cnt++;
3026         return nvmewqe;
3027 }
3028
3029 /**
3030  * lpfc_nvmet_sol_fcp_abort_cmp - Completion handler for ABTS
3031  * @phba: Pointer to HBA context object.
3032  * @cmdwqe: Pointer to driver command WQE object.
3033  * @wcqe: Pointer to driver response CQE object.
3034  *
3035  * The function is called from SLI ring event handler with no
3036  * lock held. This function is the completion handler for NVME ABTS for FCP cmds
3037  * The function frees memory resources used for the NVME commands.
3038  **/
3039 static void
3040 lpfc_nvmet_sol_fcp_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3041                              struct lpfc_wcqe_complete *wcqe)
3042 {
3043         struct lpfc_async_xchg_ctx *ctxp;
3044         struct lpfc_nvmet_tgtport *tgtp;
3045         uint32_t result;
3046         unsigned long flags;
3047         bool released = false;
3048
3049         ctxp = cmdwqe->context2;
3050         result = wcqe->parameter;
3051
3052         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3053         if (ctxp->flag & LPFC_NVME_ABORT_OP)
3054                 atomic_inc(&tgtp->xmt_fcp_abort_cmpl);
3055
3056         spin_lock_irqsave(&ctxp->ctxlock, flags);
3057         ctxp->state = LPFC_NVME_STE_DONE;
3058
3059         /* Check if we already received a free context call
3060          * and we have completed processing an abort situation.
3061          */
3062         if ((ctxp->flag & LPFC_NVME_CTX_RLS) &&
3063             !(ctxp->flag & LPFC_NVME_XBUSY)) {
3064                 spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3065                 list_del_init(&ctxp->list);
3066                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3067                 released = true;
3068         }
3069         ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3070         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3071         atomic_inc(&tgtp->xmt_abort_rsp);
3072
3073         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3074                         "6165 ABORT cmpl: oxid x%x flg x%x (%d) "
3075                         "WCQE: %08x %08x %08x %08x\n",
3076                         ctxp->oxid, ctxp->flag, released,
3077                         wcqe->word0, wcqe->total_data_placed,
3078                         result, wcqe->word3);
3079
3080         cmdwqe->context2 = NULL;
3081         cmdwqe->context3 = NULL;
3082         /*
3083          * if transport has released ctx, then can reuse it. Otherwise,
3084          * will be recycled by transport release call.
3085          */
3086         if (released)
3087                 lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
3088
3089         /* This is the iocbq for the abort, not the command */
3090         lpfc_sli_release_iocbq(phba, cmdwqe);
3091
3092         /* Since iaab/iaar are NOT set, there is no work left.
3093          * For LPFC_NVME_XBUSY, lpfc_sli4_nvmet_xri_aborted
3094          * should have been called already.
3095          */
3096 }
3097
3098 /**
3099  * lpfc_nvmet_unsol_fcp_abort_cmp - Completion handler for ABTS
3100  * @phba: Pointer to HBA context object.
3101  * @cmdwqe: Pointer to driver command WQE object.
3102  * @wcqe: Pointer to driver response CQE object.
3103  *
3104  * The function is called from SLI ring event handler with no
3105  * lock held. This function is the completion handler for NVME ABTS for FCP cmds
3106  * The function frees memory resources used for the NVME commands.
3107  **/
3108 static void
3109 lpfc_nvmet_unsol_fcp_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3110                                struct lpfc_wcqe_complete *wcqe)
3111 {
3112         struct lpfc_async_xchg_ctx *ctxp;
3113         struct lpfc_nvmet_tgtport *tgtp;
3114         unsigned long flags;
3115         uint32_t result;
3116         bool released = false;
3117
3118         ctxp = cmdwqe->context2;
3119         result = wcqe->parameter;
3120
3121         if (!ctxp) {
3122                 /* if context is clear, related io alrady complete */
3123                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3124                                 "6070 ABTS cmpl: WCQE: %08x %08x %08x %08x\n",
3125                                 wcqe->word0, wcqe->total_data_placed,
3126                                 result, wcqe->word3);
3127                 return;
3128         }
3129
3130         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3131         spin_lock_irqsave(&ctxp->ctxlock, flags);
3132         if (ctxp->flag & LPFC_NVME_ABORT_OP)
3133                 atomic_inc(&tgtp->xmt_fcp_abort_cmpl);
3134
3135         /* Sanity check */
3136         if (ctxp->state != LPFC_NVME_STE_ABORT) {
3137                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3138                                 "6112 ABTS Wrong state:%d oxid x%x\n",
3139                                 ctxp->state, ctxp->oxid);
3140         }
3141
3142         /* Check if we already received a free context call
3143          * and we have completed processing an abort situation.
3144          */
3145         ctxp->state = LPFC_NVME_STE_DONE;
3146         if ((ctxp->flag & LPFC_NVME_CTX_RLS) &&
3147             !(ctxp->flag & LPFC_NVME_XBUSY)) {
3148                 spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3149                 list_del_init(&ctxp->list);
3150                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3151                 released = true;
3152         }
3153         ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3154         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3155         atomic_inc(&tgtp->xmt_abort_rsp);
3156
3157         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3158                         "6316 ABTS cmpl oxid x%x flg x%x (%x) "
3159                         "WCQE: %08x %08x %08x %08x\n",
3160                         ctxp->oxid, ctxp->flag, released,
3161                         wcqe->word0, wcqe->total_data_placed,
3162                         result, wcqe->word3);
3163
3164         cmdwqe->context2 = NULL;
3165         cmdwqe->context3 = NULL;
3166         /*
3167          * if transport has released ctx, then can reuse it. Otherwise,
3168          * will be recycled by transport release call.
3169          */
3170         if (released)
3171                 lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
3172
3173         /* Since iaab/iaar are NOT set, there is no work left.
3174          * For LPFC_NVME_XBUSY, lpfc_sli4_nvmet_xri_aborted
3175          * should have been called already.
3176          */
3177 }
3178
3179 /**
3180  * lpfc_nvmet_xmt_ls_abort_cmp - Completion handler for ABTS
3181  * @phba: Pointer to HBA context object.
3182  * @cmdwqe: Pointer to driver command WQE object.
3183  * @wcqe: Pointer to driver response CQE object.
3184  *
3185  * The function is called from SLI ring event handler with no
3186  * lock held. This function is the completion handler for NVME ABTS for LS cmds
3187  * The function frees memory resources used for the NVME commands.
3188  **/
3189 static void
3190 lpfc_nvmet_xmt_ls_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3191                             struct lpfc_wcqe_complete *wcqe)
3192 {
3193         struct lpfc_async_xchg_ctx *ctxp;
3194         struct lpfc_nvmet_tgtport *tgtp;
3195         uint32_t result;
3196
3197         ctxp = cmdwqe->context2;
3198         result = wcqe->parameter;
3199
3200         if (phba->nvmet_support) {
3201                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3202                 atomic_inc(&tgtp->xmt_ls_abort_cmpl);
3203         }
3204
3205         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3206                         "6083 Abort cmpl: ctx x%px WCQE:%08x %08x %08x %08x\n",
3207                         ctxp, wcqe->word0, wcqe->total_data_placed,
3208                         result, wcqe->word3);
3209
3210         if (!ctxp) {
3211                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3212                                 "6415 NVMET LS Abort No ctx: WCQE: "
3213                                  "%08x %08x %08x %08x\n",
3214                                 wcqe->word0, wcqe->total_data_placed,
3215                                 result, wcqe->word3);
3216
3217                 lpfc_sli_release_iocbq(phba, cmdwqe);
3218                 return;
3219         }
3220
3221         if (ctxp->state != LPFC_NVME_STE_LS_ABORT) {
3222                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3223                                 "6416 NVMET LS abort cmpl state mismatch: "
3224                                 "oxid x%x: %d %d\n",
3225                                 ctxp->oxid, ctxp->state, ctxp->entry_cnt);
3226         }
3227
3228         cmdwqe->context2 = NULL;
3229         cmdwqe->context3 = NULL;
3230         lpfc_sli_release_iocbq(phba, cmdwqe);
3231         kfree(ctxp);
3232 }
3233
3234 static int
3235 lpfc_nvmet_unsol_issue_abort(struct lpfc_hba *phba,
3236                              struct lpfc_async_xchg_ctx *ctxp,
3237                              uint32_t sid, uint16_t xri)
3238 {
3239         struct lpfc_nvmet_tgtport *tgtp = NULL;
3240         struct lpfc_iocbq *abts_wqeq;
3241         union lpfc_wqe128 *wqe_abts;
3242         struct lpfc_nodelist *ndlp;
3243
3244         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3245                         "6067 ABTS: sid %x xri x%x/x%x\n",
3246                         sid, xri, ctxp->wqeq->sli4_xritag);
3247
3248         if (phba->nvmet_support && phba->targetport)
3249                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3250
3251         ndlp = lpfc_findnode_did(phba->pport, sid);
3252         if (!ndlp ||
3253             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
3254             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
3255                 if (tgtp)
3256                         atomic_inc(&tgtp->xmt_abort_rsp_error);
3257                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3258                                 "6134 Drop ABTS - wrong NDLP state x%x.\n",
3259                                 (ndlp) ? ndlp->nlp_state : NLP_STE_MAX_STATE);
3260
3261                 /* No failure to an ABTS request. */
3262                 return 0;
3263         }
3264
3265         abts_wqeq = ctxp->wqeq;
3266         wqe_abts = &abts_wqeq->wqe;
3267
3268         /*
3269          * Since we zero the whole WQE, we need to ensure we set the WQE fields
3270          * that were initialized in lpfc_sli4_nvmet_alloc.
3271          */
3272         memset(wqe_abts, 0, sizeof(union lpfc_wqe));
3273
3274         /* Word 5 */
3275         bf_set(wqe_dfctl, &wqe_abts->xmit_sequence.wge_ctl, 0);
3276         bf_set(wqe_ls, &wqe_abts->xmit_sequence.wge_ctl, 1);
3277         bf_set(wqe_la, &wqe_abts->xmit_sequence.wge_ctl, 0);
3278         bf_set(wqe_rctl, &wqe_abts->xmit_sequence.wge_ctl, FC_RCTL_BA_ABTS);
3279         bf_set(wqe_type, &wqe_abts->xmit_sequence.wge_ctl, FC_TYPE_BLS);
3280
3281         /* Word 6 */
3282         bf_set(wqe_ctxt_tag, &wqe_abts->xmit_sequence.wqe_com,
3283                phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
3284         bf_set(wqe_xri_tag, &wqe_abts->xmit_sequence.wqe_com,
3285                abts_wqeq->sli4_xritag);
3286
3287         /* Word 7 */
3288         bf_set(wqe_cmnd, &wqe_abts->xmit_sequence.wqe_com,
3289                CMD_XMIT_SEQUENCE64_WQE);
3290         bf_set(wqe_ct, &wqe_abts->xmit_sequence.wqe_com, SLI4_CT_RPI);
3291         bf_set(wqe_class, &wqe_abts->xmit_sequence.wqe_com, CLASS3);
3292         bf_set(wqe_pu, &wqe_abts->xmit_sequence.wqe_com, 0);
3293
3294         /* Word 8 */
3295         wqe_abts->xmit_sequence.wqe_com.abort_tag = abts_wqeq->iotag;
3296
3297         /* Word 9 */
3298         bf_set(wqe_reqtag, &wqe_abts->xmit_sequence.wqe_com, abts_wqeq->iotag);
3299         /* Needs to be set by caller */
3300         bf_set(wqe_rcvoxid, &wqe_abts->xmit_sequence.wqe_com, xri);
3301
3302         /* Word 10 */
3303         bf_set(wqe_iod, &wqe_abts->xmit_sequence.wqe_com, LPFC_WQE_IOD_WRITE);
3304         bf_set(wqe_lenloc, &wqe_abts->xmit_sequence.wqe_com,
3305                LPFC_WQE_LENLOC_WORD12);
3306         bf_set(wqe_ebde_cnt, &wqe_abts->xmit_sequence.wqe_com, 0);
3307         bf_set(wqe_qosd, &wqe_abts->xmit_sequence.wqe_com, 0);
3308
3309         /* Word 11 */
3310         bf_set(wqe_cqid, &wqe_abts->xmit_sequence.wqe_com,
3311                LPFC_WQE_CQ_ID_DEFAULT);
3312         bf_set(wqe_cmd_type, &wqe_abts->xmit_sequence.wqe_com,
3313                OTHER_COMMAND);
3314
3315         abts_wqeq->vport = phba->pport;
3316         abts_wqeq->context1 = ndlp;
3317         abts_wqeq->context2 = ctxp;
3318         abts_wqeq->context3 = NULL;
3319         abts_wqeq->rsvd2 = 0;
3320         /* hba_wqidx should already be setup from command we are aborting */
3321         abts_wqeq->iocb.ulpCommand = CMD_XMIT_SEQUENCE64_CR;
3322         abts_wqeq->iocb.ulpLe = 1;
3323
3324         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3325                         "6069 Issue ABTS to xri x%x reqtag x%x\n",
3326                         xri, abts_wqeq->iotag);
3327         return 1;
3328 }
3329
3330 /**
3331  * lpfc_nvmet_prep_abort_wqe - set up 'abort' work queue entry.
3332  * @pwqeq: Pointer to command iocb.
3333  * @xritag: Tag that  uniqely identifies the local exchange resource.
3334  * @opt: Option bits -
3335  *              bit 0 = inhibit sending abts on the link
3336  *
3337  * This function is called with hbalock held.
3338  **/
3339 static void
3340 lpfc_nvmet_prep_abort_wqe(struct lpfc_iocbq *pwqeq, u16 xritag, u8 opt)
3341 {
3342         union lpfc_wqe128 *wqe = &pwqeq->wqe;
3343
3344         /* WQEs are reused.  Clear stale data and set key fields to
3345          * zero like ia, iaab, iaar, xri_tag, and ctxt_tag.
3346          */
3347         memset(wqe, 0, sizeof(*wqe));
3348
3349         if (opt & INHIBIT_ABORT)
3350                 bf_set(abort_cmd_ia, &wqe->abort_cmd, 1);
3351         /* Abort specified xri tag, with the mask deliberately zeroed */
3352         bf_set(abort_cmd_criteria, &wqe->abort_cmd, T_XRI_TAG);
3353
3354         bf_set(wqe_cmnd, &wqe->abort_cmd.wqe_com, CMD_ABORT_XRI_CX);
3355
3356         /* Abort the I/O associated with this outstanding exchange ID. */
3357         wqe->abort_cmd.wqe_com.abort_tag = xritag;
3358
3359         /* iotag for the wqe completion. */
3360         bf_set(wqe_reqtag, &wqe->abort_cmd.wqe_com, pwqeq->iotag);
3361
3362         bf_set(wqe_qosd, &wqe->abort_cmd.wqe_com, 1);
3363         bf_set(wqe_lenloc, &wqe->abort_cmd.wqe_com, LPFC_WQE_LENLOC_NONE);
3364
3365         bf_set(wqe_cmd_type, &wqe->abort_cmd.wqe_com, OTHER_COMMAND);
3366         bf_set(wqe_wqec, &wqe->abort_cmd.wqe_com, 1);
3367         bf_set(wqe_cqid, &wqe->abort_cmd.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
3368 }
3369
3370 static int
3371 lpfc_nvmet_sol_fcp_issue_abort(struct lpfc_hba *phba,
3372                                struct lpfc_async_xchg_ctx *ctxp,
3373                                uint32_t sid, uint16_t xri)
3374 {
3375         struct lpfc_nvmet_tgtport *tgtp;
3376         struct lpfc_iocbq *abts_wqeq;
3377         struct lpfc_nodelist *ndlp;
3378         unsigned long flags;
3379         u8 opt;
3380         int rc;
3381
3382         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3383         if (!ctxp->wqeq) {
3384                 ctxp->wqeq = ctxp->ctxbuf->iocbq;
3385                 ctxp->wqeq->hba_wqidx = 0;
3386         }
3387
3388         ndlp = lpfc_findnode_did(phba->pport, sid);
3389         if (!ndlp ||
3390             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
3391             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
3392                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3393                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3394                                 "6160 Drop ABORT - wrong NDLP state x%x.\n",
3395                                 (ndlp) ? ndlp->nlp_state : NLP_STE_MAX_STATE);
3396
3397                 /* No failure to an ABTS request. */
3398                 spin_lock_irqsave(&ctxp->ctxlock, flags);
3399                 ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3400                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3401                 return 0;
3402         }
3403
3404         /* Issue ABTS for this WQE based on iotag */
3405         ctxp->abort_wqeq = lpfc_sli_get_iocbq(phba);
3406         spin_lock_irqsave(&ctxp->ctxlock, flags);
3407         if (!ctxp->abort_wqeq) {
3408                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3409                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3410                                 "6161 ABORT failed: No wqeqs: "
3411                                 "xri: x%x\n", ctxp->oxid);
3412                 /* No failure to an ABTS request. */
3413                 ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3414                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3415                 return 0;
3416         }
3417         abts_wqeq = ctxp->abort_wqeq;
3418         ctxp->state = LPFC_NVME_STE_ABORT;
3419         opt = (ctxp->flag & LPFC_NVME_ABTS_RCV) ? INHIBIT_ABORT : 0;
3420         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3421
3422         /* Announce entry to new IO submit field. */
3423         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3424                         "6162 ABORT Request to rport DID x%06x "
3425                         "for xri x%x x%x\n",
3426                         ctxp->sid, ctxp->oxid, ctxp->wqeq->sli4_xritag);
3427
3428         /* If the hba is getting reset, this flag is set.  It is
3429          * cleared when the reset is complete and rings reestablished.
3430          */
3431         spin_lock_irqsave(&phba->hbalock, flags);
3432         /* driver queued commands are in process of being flushed */
3433         if (phba->hba_flag & HBA_IOQ_FLUSH) {
3434                 spin_unlock_irqrestore(&phba->hbalock, flags);
3435                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3436                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3437                                 "6163 Driver in reset cleanup - flushing "
3438                                 "NVME Req now. hba_flag x%x oxid x%x\n",
3439                                 phba->hba_flag, ctxp->oxid);
3440                 lpfc_sli_release_iocbq(phba, abts_wqeq);
3441                 spin_lock_irqsave(&ctxp->ctxlock, flags);
3442                 ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3443                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3444                 return 0;
3445         }
3446
3447         /* Outstanding abort is in progress */
3448         if (abts_wqeq->iocb_flag & LPFC_DRIVER_ABORTED) {
3449                 spin_unlock_irqrestore(&phba->hbalock, flags);
3450                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3451                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3452                                 "6164 Outstanding NVME I/O Abort Request "
3453                                 "still pending on oxid x%x\n",
3454                                 ctxp->oxid);
3455                 lpfc_sli_release_iocbq(phba, abts_wqeq);
3456                 spin_lock_irqsave(&ctxp->ctxlock, flags);
3457                 ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3458                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3459                 return 0;
3460         }
3461
3462         /* Ready - mark outstanding as aborted by driver. */
3463         abts_wqeq->iocb_flag |= LPFC_DRIVER_ABORTED;
3464
3465         lpfc_nvmet_prep_abort_wqe(abts_wqeq, ctxp->wqeq->sli4_xritag, opt);
3466
3467         /* ABTS WQE must go to the same WQ as the WQE to be aborted */
3468         abts_wqeq->hba_wqidx = ctxp->wqeq->hba_wqidx;
3469         abts_wqeq->wqe_cmpl = lpfc_nvmet_sol_fcp_abort_cmp;
3470         abts_wqeq->iocb_cmpl = NULL;
3471         abts_wqeq->iocb_flag |= LPFC_IO_NVME;
3472         abts_wqeq->context2 = ctxp;
3473         abts_wqeq->vport = phba->pport;
3474         if (!ctxp->hdwq)
3475                 ctxp->hdwq = &phba->sli4_hba.hdwq[abts_wqeq->hba_wqidx];
3476
3477         rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, abts_wqeq);
3478         spin_unlock_irqrestore(&phba->hbalock, flags);
3479         if (rc == WQE_SUCCESS) {
3480                 atomic_inc(&tgtp->xmt_abort_sol);
3481                 return 0;
3482         }
3483
3484         atomic_inc(&tgtp->xmt_abort_rsp_error);
3485         spin_lock_irqsave(&ctxp->ctxlock, flags);
3486         ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3487         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3488         lpfc_sli_release_iocbq(phba, abts_wqeq);
3489         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3490                         "6166 Failed ABORT issue_wqe with status x%x "
3491                         "for oxid x%x.\n",
3492                         rc, ctxp->oxid);
3493         return 1;
3494 }
3495
3496 static int
3497 lpfc_nvmet_unsol_fcp_issue_abort(struct lpfc_hba *phba,
3498                                  struct lpfc_async_xchg_ctx *ctxp,
3499                                  uint32_t sid, uint16_t xri)
3500 {
3501         struct lpfc_nvmet_tgtport *tgtp;
3502         struct lpfc_iocbq *abts_wqeq;
3503         unsigned long flags;
3504         bool released = false;
3505         int rc;
3506
3507         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3508         if (!ctxp->wqeq) {
3509                 ctxp->wqeq = ctxp->ctxbuf->iocbq;
3510                 ctxp->wqeq->hba_wqidx = 0;
3511         }
3512
3513         if (ctxp->state == LPFC_NVME_STE_FREE) {
3514                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3515                                 "6417 NVMET ABORT ctx freed %d %d oxid x%x\n",
3516                                 ctxp->state, ctxp->entry_cnt, ctxp->oxid);
3517                 rc = WQE_BUSY;
3518                 goto aerr;
3519         }
3520         ctxp->state = LPFC_NVME_STE_ABORT;
3521         ctxp->entry_cnt++;
3522         rc = lpfc_nvmet_unsol_issue_abort(phba, ctxp, sid, xri);
3523         if (rc == 0)
3524                 goto aerr;
3525
3526         spin_lock_irqsave(&phba->hbalock, flags);
3527         abts_wqeq = ctxp->wqeq;
3528         abts_wqeq->wqe_cmpl = lpfc_nvmet_unsol_fcp_abort_cmp;
3529         abts_wqeq->iocb_cmpl = NULL;
3530         abts_wqeq->iocb_flag |= LPFC_IO_NVMET;
3531         if (!ctxp->hdwq)
3532                 ctxp->hdwq = &phba->sli4_hba.hdwq[abts_wqeq->hba_wqidx];
3533
3534         rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, abts_wqeq);
3535         spin_unlock_irqrestore(&phba->hbalock, flags);
3536         if (rc == WQE_SUCCESS) {
3537                 return 0;
3538         }
3539
3540 aerr:
3541         spin_lock_irqsave(&ctxp->ctxlock, flags);
3542         if (ctxp->flag & LPFC_NVME_CTX_RLS) {
3543                 spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3544                 list_del_init(&ctxp->list);
3545                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3546                 released = true;
3547         }
3548         ctxp->flag &= ~(LPFC_NVME_ABORT_OP | LPFC_NVME_CTX_RLS);
3549         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3550
3551         atomic_inc(&tgtp->xmt_abort_rsp_error);
3552         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3553                         "6135 Failed to Issue ABTS for oxid x%x. Status x%x "
3554                         "(%x)\n",
3555                         ctxp->oxid, rc, released);
3556         if (released)
3557                 lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
3558         return 1;
3559 }
3560
3561 /**
3562  * lpfc_nvme_unsol_ls_issue_abort - issue ABTS on an exchange received
3563  *        via async frame receive where the frame is not handled.
3564  * @phba: pointer to adapter structure
3565  * @ctxp: pointer to the asynchronously received received sequence
3566  * @sid: address of the remote port to send the ABTS to
3567  * @xri: oxid value to for the ABTS (other side's exchange id).
3568  **/
3569 int
3570 lpfc_nvme_unsol_ls_issue_abort(struct lpfc_hba *phba,
3571                                 struct lpfc_async_xchg_ctx *ctxp,
3572                                 uint32_t sid, uint16_t xri)
3573 {
3574         struct lpfc_nvmet_tgtport *tgtp = NULL;
3575         struct lpfc_iocbq *abts_wqeq;
3576         unsigned long flags;
3577         int rc;
3578
3579         if ((ctxp->state == LPFC_NVME_STE_LS_RCV && ctxp->entry_cnt == 1) ||
3580             (ctxp->state == LPFC_NVME_STE_LS_RSP && ctxp->entry_cnt == 2)) {
3581                 ctxp->state = LPFC_NVME_STE_LS_ABORT;
3582                 ctxp->entry_cnt++;
3583         } else {
3584                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3585                                 "6418 NVMET LS abort state mismatch "
3586                                 "IO x%x: %d %d\n",
3587                                 ctxp->oxid, ctxp->state, ctxp->entry_cnt);
3588                 ctxp->state = LPFC_NVME_STE_LS_ABORT;
3589         }
3590
3591         if (phba->nvmet_support && phba->targetport)
3592                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3593
3594         if (!ctxp->wqeq) {
3595                 /* Issue ABTS for this WQE based on iotag */
3596                 ctxp->wqeq = lpfc_sli_get_iocbq(phba);
3597                 if (!ctxp->wqeq) {
3598                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3599                                         "6068 Abort failed: No wqeqs: "
3600                                         "xri: x%x\n", xri);
3601                         /* No failure to an ABTS request. */
3602                         kfree(ctxp);
3603                         return 0;
3604                 }
3605         }
3606         abts_wqeq = ctxp->wqeq;
3607
3608         if (lpfc_nvmet_unsol_issue_abort(phba, ctxp, sid, xri) == 0) {
3609                 rc = WQE_BUSY;
3610                 goto out;
3611         }
3612
3613         spin_lock_irqsave(&phba->hbalock, flags);
3614         abts_wqeq->wqe_cmpl = lpfc_nvmet_xmt_ls_abort_cmp;
3615         abts_wqeq->iocb_cmpl = NULL;
3616         abts_wqeq->iocb_flag |=  LPFC_IO_NVME_LS;
3617         rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, abts_wqeq);
3618         spin_unlock_irqrestore(&phba->hbalock, flags);
3619         if (rc == WQE_SUCCESS) {
3620                 if (tgtp)
3621                         atomic_inc(&tgtp->xmt_abort_unsol);
3622                 return 0;
3623         }
3624 out:
3625         if (tgtp)
3626                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3627         abts_wqeq->context2 = NULL;
3628         abts_wqeq->context3 = NULL;
3629         lpfc_sli_release_iocbq(phba, abts_wqeq);
3630         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3631                         "6056 Failed to Issue ABTS. Status x%x\n", rc);
3632         return 1;
3633 }
3634
3635 /**
3636  * lpfc_nvmet_invalidate_host
3637  *
3638  * @phba: pointer to the driver instance bound to an adapter port.
3639  * @ndlp: pointer to an lpfc_nodelist type
3640  *
3641  * This routine upcalls the nvmet transport to invalidate an NVME
3642  * host to which this target instance had active connections.
3643  */
3644 void
3645 lpfc_nvmet_invalidate_host(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
3646 {
3647         u32 ndlp_has_hh;
3648         struct lpfc_nvmet_tgtport *tgtp;
3649
3650         lpfc_printf_log(phba, KERN_INFO,
3651                         LOG_NVME | LOG_NVME_ABTS | LOG_NVME_DISC,
3652                         "6203 Invalidating hosthandle x%px\n",
3653                         ndlp);
3654
3655         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3656         atomic_set(&tgtp->state, LPFC_NVMET_INV_HOST_ACTIVE);
3657
3658         spin_lock_irq(&ndlp->lock);
3659         ndlp_has_hh = ndlp->fc4_xpt_flags & NLP_XPT_HAS_HH;
3660         spin_unlock_irq(&ndlp->lock);
3661
3662         /* Do not invalidate any nodes that do not have a hosthandle.
3663          * The host_release callbk will cause a node reference
3664          * count imbalance and a crash.
3665          */
3666         if (!ndlp_has_hh) {
3667                 lpfc_printf_log(phba, KERN_INFO,
3668                                 LOG_NVME | LOG_NVME_ABTS | LOG_NVME_DISC,
3669                                 "6204 Skip invalidate on node x%px DID x%x\n",
3670                                 ndlp, ndlp->nlp_DID);
3671                 return;
3672         }
3673
3674 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
3675         /* Need to get the nvmet_fc_target_port pointer here.*/
3676         nvmet_fc_invalidate_host(phba->targetport, ndlp);
3677 #endif
3678 }