drivers/scsi/lpfc/lpfc_nvmet.c

   1 /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Fibre Channsel Host Bus Adapters.                               *
   4  * Copyright (C) 2017-2020 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 = NULL;
1371         struct lpfc_nvmet_tgtport *tgtp;
1372
1373         phba = ndlp->phba;
1374         if (!phba->targetport || !phba->targetport->private)
1375                 return;
1376
1377         lpfc_printf_log(phba, KERN_ERR, LOG_NVME,
1378                         "6202 NVMET XPT releasing hosthandle x%px\n",
1379                         hosthandle);
1380         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
1381         atomic_set(&tgtp->state, 0);
1382 }
1383
1384 static void
1385 lpfc_nvmet_discovery_event(struct nvmet_fc_target_port *tgtport)
1386 {
1387         struct lpfc_nvmet_tgtport *tgtp;
1388         struct lpfc_hba *phba;
1389         uint32_t rc;
1390
1391         tgtp = tgtport->private;
1392         phba = tgtp->phba;
1393
1394         rc = lpfc_issue_els_rscn(phba->pport, 0);
1395         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1396                         "6420 NVMET subsystem change: Notification %s\n",
1397                         (rc) ? "Failed" : "Sent");
1398 }
1399
1400 static struct nvmet_fc_target_template lpfc_tgttemplate = {
1401         .targetport_delete = lpfc_nvmet_targetport_delete,
1402         .xmt_ls_rsp     = lpfc_nvmet_xmt_ls_rsp,
1403         .fcp_op         = lpfc_nvmet_xmt_fcp_op,
1404         .fcp_abort      = lpfc_nvmet_xmt_fcp_abort,
1405         .fcp_req_release = lpfc_nvmet_xmt_fcp_release,
1406         .defer_rcv      = lpfc_nvmet_defer_rcv,
1407         .discovery_event = lpfc_nvmet_discovery_event,
1408         .ls_req         = lpfc_nvmet_ls_req,
1409         .ls_abort       = lpfc_nvmet_ls_abort,
1410         .host_release   = lpfc_nvmet_host_release,
1411
1412         .max_hw_queues  = 1,
1413         .max_sgl_segments = LPFC_NVMET_DEFAULT_SEGS,
1414         .max_dif_sgl_segments = LPFC_NVMET_DEFAULT_SEGS,
1415         .dma_boundary = 0xFFFFFFFF,
1416
1417         /* optional features */
1418         .target_features = 0,
1419         /* sizes of additional private data for data structures */
1420         .target_priv_sz = sizeof(struct lpfc_nvmet_tgtport),
1421         .lsrqst_priv_sz = 0,
1422 };
1423
1424 static void
1425 __lpfc_nvmet_clean_io_for_cpu(struct lpfc_hba *phba,
1426                 struct lpfc_nvmet_ctx_info *infop)
1427 {
1428         struct lpfc_nvmet_ctxbuf *ctx_buf, *next_ctx_buf;
1429         unsigned long flags;
1430
1431         spin_lock_irqsave(&infop->nvmet_ctx_list_lock, flags);
1432         list_for_each_entry_safe(ctx_buf, next_ctx_buf,
1433                                 &infop->nvmet_ctx_list, list) {
1434                 spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1435                 list_del_init(&ctx_buf->list);
1436                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1437
1438                 __lpfc_clear_active_sglq(phba, ctx_buf->sglq->sli4_lxritag);
1439                 ctx_buf->sglq->state = SGL_FREED;
1440                 ctx_buf->sglq->ndlp = NULL;
1441
1442                 spin_lock(&phba->sli4_hba.sgl_list_lock);
1443                 list_add_tail(&ctx_buf->sglq->list,
1444                                 &phba->sli4_hba.lpfc_nvmet_sgl_list);
1445                 spin_unlock(&phba->sli4_hba.sgl_list_lock);
1446
1447                 lpfc_sli_release_iocbq(phba, ctx_buf->iocbq);
1448                 kfree(ctx_buf->context);
1449         }
1450         spin_unlock_irqrestore(&infop->nvmet_ctx_list_lock, flags);
1451 }
1452
1453 static void
1454 lpfc_nvmet_cleanup_io_context(struct lpfc_hba *phba)
1455 {
1456         struct lpfc_nvmet_ctx_info *infop;
1457         int i, j;
1458
1459         /* The first context list, MRQ 0 CPU 0 */
1460         infop = phba->sli4_hba.nvmet_ctx_info;
1461         if (!infop)
1462                 return;
1463
1464         /* Cycle the the entire CPU context list for every MRQ */
1465         for (i = 0; i < phba->cfg_nvmet_mrq; i++) {
1466                 for_each_present_cpu(j) {
1467                         infop = lpfc_get_ctx_list(phba, j, i);
1468                         __lpfc_nvmet_clean_io_for_cpu(phba, infop);
1469                 }
1470         }
1471         kfree(phba->sli4_hba.nvmet_ctx_info);
1472         phba->sli4_hba.nvmet_ctx_info = NULL;
1473 }
1474
1475 static int
1476 lpfc_nvmet_setup_io_context(struct lpfc_hba *phba)
1477 {
1478         struct lpfc_nvmet_ctxbuf *ctx_buf;
1479         struct lpfc_iocbq *nvmewqe;
1480         union lpfc_wqe128 *wqe;
1481         struct lpfc_nvmet_ctx_info *last_infop;
1482         struct lpfc_nvmet_ctx_info *infop;
1483         int i, j, idx, cpu;
1484
1485         lpfc_printf_log(phba, KERN_INFO, LOG_NVME,
1486                         "6403 Allocate NVMET resources for %d XRIs\n",
1487                         phba->sli4_hba.nvmet_xri_cnt);
1488
1489         phba->sli4_hba.nvmet_ctx_info = kcalloc(
1490                 phba->sli4_hba.num_possible_cpu * phba->cfg_nvmet_mrq,
1491                 sizeof(struct lpfc_nvmet_ctx_info), GFP_KERNEL);
1492         if (!phba->sli4_hba.nvmet_ctx_info) {
1493                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1494                                 "6419 Failed allocate memory for "
1495                                 "nvmet context lists\n");
1496                 return -ENOMEM;
1497         }
1498
1499         /*
1500          * Assuming X CPUs in the system, and Y MRQs, allocate some
1501          * lpfc_nvmet_ctx_info structures as follows:
1502          *
1503          * cpu0/mrq0 cpu1/mrq0 ... cpuX/mrq0
1504          * cpu0/mrq1 cpu1/mrq1 ... cpuX/mrq1
1505          * ...
1506          * cpuX/mrqY cpuX/mrqY ... cpuX/mrqY
1507          *
1508          * Each line represents a MRQ "silo" containing an entry for
1509          * every CPU.
1510          *
1511          * MRQ X is initially assumed to be associated with CPU X, thus
1512          * contexts are initially distributed across all MRQs using
1513          * the MRQ index (N) as follows cpuN/mrqN. When contexts are
1514          * freed, the are freed to the MRQ silo based on the CPU number
1515          * of the IO completion. Thus a context that was allocated for MRQ A
1516          * whose IO completed on CPU B will be freed to cpuB/mrqA.
1517          */
1518         for_each_possible_cpu(i) {
1519                 for (j = 0; j < phba->cfg_nvmet_mrq; j++) {
1520                         infop = lpfc_get_ctx_list(phba, i, j);
1521                         INIT_LIST_HEAD(&infop->nvmet_ctx_list);
1522                         spin_lock_init(&infop->nvmet_ctx_list_lock);
1523                         infop->nvmet_ctx_list_cnt = 0;
1524                 }
1525         }
1526
1527         /*
1528          * Setup the next CPU context info ptr for each MRQ.
1529          * MRQ 0 will cycle thru CPUs 0 - X separately from
1530          * MRQ 1 cycling thru CPUs 0 - X, and so on.
1531          */
1532         for (j = 0; j < phba->cfg_nvmet_mrq; j++) {
1533                 last_infop = lpfc_get_ctx_list(phba,
1534                                                cpumask_first(cpu_present_mask),
1535                                                j);
1536                 for (i = phba->sli4_hba.num_possible_cpu - 1;  i >= 0; i--) {
1537                         infop = lpfc_get_ctx_list(phba, i, j);
1538                         infop->nvmet_ctx_next_cpu = last_infop;
1539                         last_infop = infop;
1540                 }
1541         }
1542
1543         /* For all nvmet xris, allocate resources needed to process a
1544          * received command on a per xri basis.
1545          */
1546         idx = 0;
1547         cpu = cpumask_first(cpu_present_mask);
1548         for (i = 0; i < phba->sli4_hba.nvmet_xri_cnt; i++) {
1549                 ctx_buf = kzalloc(sizeof(*ctx_buf), GFP_KERNEL);
1550                 if (!ctx_buf) {
1551                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1552                                         "6404 Ran out of memory for NVMET\n");
1553                         return -ENOMEM;
1554                 }
1555
1556                 ctx_buf->context = kzalloc(sizeof(*ctx_buf->context),
1557                                            GFP_KERNEL);
1558                 if (!ctx_buf->context) {
1559                         kfree(ctx_buf);
1560                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1561                                         "6405 Ran out of NVMET "
1562                                         "context memory\n");
1563                         return -ENOMEM;
1564                 }
1565                 ctx_buf->context->ctxbuf = ctx_buf;
1566                 ctx_buf->context->state = LPFC_NVME_STE_FREE;
1567
1568                 ctx_buf->iocbq = lpfc_sli_get_iocbq(phba);
1569                 if (!ctx_buf->iocbq) {
1570                         kfree(ctx_buf->context);
1571                         kfree(ctx_buf);
1572                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1573                                         "6406 Ran out of NVMET iocb/WQEs\n");
1574                         return -ENOMEM;
1575                 }
1576                 ctx_buf->iocbq->iocb_flag = LPFC_IO_NVMET;
1577                 nvmewqe = ctx_buf->iocbq;
1578                 wqe = &nvmewqe->wqe;
1579
1580                 /* Initialize WQE */
1581                 memset(wqe, 0, sizeof(union lpfc_wqe));
1582
1583                 ctx_buf->iocbq->context1 = NULL;
1584                 spin_lock(&phba->sli4_hba.sgl_list_lock);
1585                 ctx_buf->sglq = __lpfc_sli_get_nvmet_sglq(phba, ctx_buf->iocbq);
1586                 spin_unlock(&phba->sli4_hba.sgl_list_lock);
1587                 if (!ctx_buf->sglq) {
1588                         lpfc_sli_release_iocbq(phba, ctx_buf->iocbq);
1589                         kfree(ctx_buf->context);
1590                         kfree(ctx_buf);
1591                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1592                                         "6407 Ran out of NVMET XRIs\n");
1593                         return -ENOMEM;
1594                 }
1595                 INIT_WORK(&ctx_buf->defer_work, lpfc_nvmet_fcp_rqst_defer_work);
1596
1597                 /*
1598                  * Add ctx to MRQidx context list. Our initial assumption
1599                  * is MRQidx will be associated with CPUidx. This association
1600                  * can change on the fly.
1601                  */
1602                 infop = lpfc_get_ctx_list(phba, cpu, idx);
1603                 spin_lock(&infop->nvmet_ctx_list_lock);
1604                 list_add_tail(&ctx_buf->list, &infop->nvmet_ctx_list);
1605                 infop->nvmet_ctx_list_cnt++;
1606                 spin_unlock(&infop->nvmet_ctx_list_lock);
1607
1608                 /* Spread ctx structures evenly across all MRQs */
1609                 idx++;
1610                 if (idx >= phba->cfg_nvmet_mrq) {
1611                         idx = 0;
1612                         cpu = cpumask_first(cpu_present_mask);
1613                         continue;
1614                 }
1615                 cpu = cpumask_next(cpu, cpu_present_mask);
1616                 if (cpu == nr_cpu_ids)
1617                         cpu = cpumask_first(cpu_present_mask);
1618
1619         }
1620
1621         for_each_present_cpu(i) {
1622                 for (j = 0; j < phba->cfg_nvmet_mrq; j++) {
1623                         infop = lpfc_get_ctx_list(phba, i, j);
1624                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME | LOG_INIT,
1625                                         "6408 TOTAL NVMET ctx for CPU %d "
1626                                         "MRQ %d: cnt %d nextcpu x%px\n",
1627                                         i, j, infop->nvmet_ctx_list_cnt,
1628                                         infop->nvmet_ctx_next_cpu);
1629                 }
1630         }
1631         return 0;
1632 }
1633
1634 int
1635 lpfc_nvmet_create_targetport(struct lpfc_hba *phba)
1636 {
1637         struct lpfc_vport  *vport = phba->pport;
1638         struct lpfc_nvmet_tgtport *tgtp;
1639         struct nvmet_fc_port_info pinfo;
1640         int error;
1641
1642         if (phba->targetport)
1643                 return 0;
1644
1645         error = lpfc_nvmet_setup_io_context(phba);
1646         if (error)
1647                 return error;
1648
1649         memset(&pinfo, 0, sizeof(struct nvmet_fc_port_info));
1650         pinfo.node_name = wwn_to_u64(vport->fc_nodename.u.wwn);
1651         pinfo.port_name = wwn_to_u64(vport->fc_portname.u.wwn);
1652         pinfo.port_id = vport->fc_myDID;
1653
1654         /* We need to tell the transport layer + 1 because it takes page
1655          * alignment into account. When space for the SGL is allocated we
1656          * allocate + 3, one for cmd, one for rsp and one for this alignment
1657          */
1658         lpfc_tgttemplate.max_sgl_segments = phba->cfg_nvme_seg_cnt + 1;
1659         lpfc_tgttemplate.max_hw_queues = phba->cfg_hdw_queue;
1660         lpfc_tgttemplate.target_features = NVMET_FCTGTFEAT_READDATA_RSP;
1661
1662 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
1663         error = nvmet_fc_register_targetport(&pinfo, &lpfc_tgttemplate,
1664                                              &phba->pcidev->dev,
1665                                              &phba->targetport);
1666 #else
1667         error = -ENOENT;
1668 #endif
1669         if (error) {
1670                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1671                                 "6025 Cannot register NVME targetport x%x: "
1672                                 "portnm %llx nodenm %llx segs %d qs %d\n",
1673                                 error,
1674                                 pinfo.port_name, pinfo.node_name,
1675                                 lpfc_tgttemplate.max_sgl_segments,
1676                                 lpfc_tgttemplate.max_hw_queues);
1677                 phba->targetport = NULL;
1678                 phba->nvmet_support = 0;
1679
1680                 lpfc_nvmet_cleanup_io_context(phba);
1681
1682         } else {
1683                 tgtp = (struct lpfc_nvmet_tgtport *)
1684                         phba->targetport->private;
1685                 tgtp->phba = phba;
1686
1687                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
1688                                 "6026 Registered NVME "
1689                                 "targetport: x%px, private x%px "
1690                                 "portnm %llx nodenm %llx segs %d qs %d\n",
1691                                 phba->targetport, tgtp,
1692                                 pinfo.port_name, pinfo.node_name,
1693                                 lpfc_tgttemplate.max_sgl_segments,
1694                                 lpfc_tgttemplate.max_hw_queues);
1695
1696                 atomic_set(&tgtp->rcv_ls_req_in, 0);
1697                 atomic_set(&tgtp->rcv_ls_req_out, 0);
1698                 atomic_set(&tgtp->rcv_ls_req_drop, 0);
1699                 atomic_set(&tgtp->xmt_ls_abort, 0);
1700                 atomic_set(&tgtp->xmt_ls_abort_cmpl, 0);
1701                 atomic_set(&tgtp->xmt_ls_rsp, 0);
1702                 atomic_set(&tgtp->xmt_ls_drop, 0);
1703                 atomic_set(&tgtp->xmt_ls_rsp_error, 0);
1704                 atomic_set(&tgtp->xmt_ls_rsp_xb_set, 0);
1705                 atomic_set(&tgtp->xmt_ls_rsp_aborted, 0);
1706                 atomic_set(&tgtp->xmt_ls_rsp_cmpl, 0);
1707                 atomic_set(&tgtp->rcv_fcp_cmd_in, 0);
1708                 atomic_set(&tgtp->rcv_fcp_cmd_out, 0);
1709                 atomic_set(&tgtp->rcv_fcp_cmd_drop, 0);
1710                 atomic_set(&tgtp->xmt_fcp_drop, 0);
1711                 atomic_set(&tgtp->xmt_fcp_read_rsp, 0);
1712                 atomic_set(&tgtp->xmt_fcp_read, 0);
1713                 atomic_set(&tgtp->xmt_fcp_write, 0);
1714                 atomic_set(&tgtp->xmt_fcp_rsp, 0);
1715                 atomic_set(&tgtp->xmt_fcp_release, 0);
1716                 atomic_set(&tgtp->xmt_fcp_rsp_cmpl, 0);
1717                 atomic_set(&tgtp->xmt_fcp_rsp_error, 0);
1718                 atomic_set(&tgtp->xmt_fcp_rsp_xb_set, 0);
1719                 atomic_set(&tgtp->xmt_fcp_rsp_aborted, 0);
1720                 atomic_set(&tgtp->xmt_fcp_rsp_drop, 0);
1721                 atomic_set(&tgtp->xmt_fcp_xri_abort_cqe, 0);
1722                 atomic_set(&tgtp->xmt_fcp_abort, 0);
1723                 atomic_set(&tgtp->xmt_fcp_abort_cmpl, 0);
1724                 atomic_set(&tgtp->xmt_abort_unsol, 0);
1725                 atomic_set(&tgtp->xmt_abort_sol, 0);
1726                 atomic_set(&tgtp->xmt_abort_rsp, 0);
1727                 atomic_set(&tgtp->xmt_abort_rsp_error, 0);
1728                 atomic_set(&tgtp->defer_ctx, 0);
1729                 atomic_set(&tgtp->defer_fod, 0);
1730                 atomic_set(&tgtp->defer_wqfull, 0);
1731         }
1732         return error;
1733 }
1734
1735 int
1736 lpfc_nvmet_update_targetport(struct lpfc_hba *phba)
1737 {
1738         struct lpfc_vport  *vport = phba->pport;
1739
1740         if (!phba->targetport)
1741                 return 0;
1742
1743         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
1744                          "6007 Update NVMET port x%px did x%x\n",
1745                          phba->targetport, vport->fc_myDID);
1746
1747         phba->targetport->port_id = vport->fc_myDID;
1748         return 0;
1749 }
1750
1751 /**
1752  * lpfc_sli4_nvmet_xri_aborted - Fast-path process of nvmet xri abort
1753  * @phba: pointer to lpfc hba data structure.
1754  * @axri: pointer to the nvmet xri abort wcqe structure.
1755  *
1756  * This routine is invoked by the worker thread to process a SLI4 fast-path
1757  * NVMET aborted xri.
1758  **/
1759 void
1760 lpfc_sli4_nvmet_xri_aborted(struct lpfc_hba *phba,
1761                             struct sli4_wcqe_xri_aborted *axri)
1762 {
1763 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
1764         uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
1765         uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
1766         struct lpfc_async_xchg_ctx *ctxp, *next_ctxp;
1767         struct lpfc_nvmet_tgtport *tgtp;
1768         struct nvmefc_tgt_fcp_req *req = NULL;
1769         struct lpfc_nodelist *ndlp;
1770         unsigned long iflag = 0;
1771         int rrq_empty = 0;
1772         bool released = false;
1773
1774         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1775                         "6317 XB aborted xri x%x rxid x%x\n", xri, rxid);
1776
1777         if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_NVME))
1778                 return;
1779
1780         if (phba->targetport) {
1781                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
1782                 atomic_inc(&tgtp->xmt_fcp_xri_abort_cqe);
1783         }
1784
1785         spin_lock_irqsave(&phba->hbalock, iflag);
1786         spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1787         list_for_each_entry_safe(ctxp, next_ctxp,
1788                                  &phba->sli4_hba.lpfc_abts_nvmet_ctx_list,
1789                                  list) {
1790                 if (ctxp->ctxbuf->sglq->sli4_xritag != xri)
1791                         continue;
1792
1793                 spin_lock(&ctxp->ctxlock);
1794                 /* Check if we already received a free context call
1795                  * and we have completed processing an abort situation.
1796                  */
1797                 if (ctxp->flag & LPFC_NVME_CTX_RLS &&
1798                     !(ctxp->flag & LPFC_NVME_ABORT_OP)) {
1799                         list_del_init(&ctxp->list);
1800                         released = true;
1801                 }
1802                 ctxp->flag &= ~LPFC_NVME_XBUSY;
1803                 spin_unlock(&ctxp->ctxlock);
1804                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1805
1806                 rrq_empty = list_empty(&phba->active_rrq_list);
1807                 spin_unlock_irqrestore(&phba->hbalock, iflag);
1808                 ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
1809                 if (ndlp &&
1810                     (ndlp->nlp_state == NLP_STE_UNMAPPED_NODE ||
1811                      ndlp->nlp_state == NLP_STE_MAPPED_NODE)) {
1812                         lpfc_set_rrq_active(phba, ndlp,
1813                                 ctxp->ctxbuf->sglq->sli4_lxritag,
1814                                 rxid, 1);
1815                         lpfc_sli4_abts_err_handler(phba, ndlp, axri);
1816                 }
1817
1818                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1819                                 "6318 XB aborted oxid x%x flg x%x (%x)\n",
1820                                 ctxp->oxid, ctxp->flag, released);
1821                 if (released)
1822                         lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
1823
1824                 if (rrq_empty)
1825                         lpfc_worker_wake_up(phba);
1826                 return;
1827         }
1828         spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1829         spin_unlock_irqrestore(&phba->hbalock, iflag);
1830
1831         ctxp = lpfc_nvmet_get_ctx_for_xri(phba, xri);
1832         if (ctxp) {
1833                 /*
1834                  *  Abort already done by FW, so BA_ACC sent.
1835                  *  However, the transport may be unaware.
1836                  */
1837                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1838                                 "6323 NVMET Rcv ABTS xri x%x ctxp state x%x "
1839                                 "flag x%x oxid x%x rxid x%x\n",
1840                                 xri, ctxp->state, ctxp->flag, ctxp->oxid,
1841                                 rxid);
1842
1843                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
1844                 ctxp->flag |= LPFC_NVME_ABTS_RCV;
1845                 ctxp->state = LPFC_NVME_STE_ABORT;
1846                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1847
1848                 lpfc_nvmeio_data(phba,
1849                                  "NVMET ABTS RCV: xri x%x CPU %02x rjt %d\n",
1850                                  xri, raw_smp_processor_id(), 0);
1851
1852                 req = &ctxp->hdlrctx.fcp_req;
1853                 if (req)
1854                         nvmet_fc_rcv_fcp_abort(phba->targetport, req);
1855         }
1856 #endif
1857 }
1858
1859 int
1860 lpfc_nvmet_rcv_unsol_abort(struct lpfc_vport *vport,
1861                            struct fc_frame_header *fc_hdr)
1862 {
1863 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
1864         struct lpfc_hba *phba = vport->phba;
1865         struct lpfc_async_xchg_ctx *ctxp, *next_ctxp;
1866         struct nvmefc_tgt_fcp_req *rsp;
1867         uint32_t sid;
1868         uint16_t oxid, xri;
1869         unsigned long iflag = 0;
1870
1871         sid = sli4_sid_from_fc_hdr(fc_hdr);
1872         oxid = be16_to_cpu(fc_hdr->fh_ox_id);
1873
1874         spin_lock_irqsave(&phba->hbalock, iflag);
1875         spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1876         list_for_each_entry_safe(ctxp, next_ctxp,
1877                                  &phba->sli4_hba.lpfc_abts_nvmet_ctx_list,
1878                                  list) {
1879                 if (ctxp->oxid != oxid || ctxp->sid != sid)
1880                         continue;
1881
1882                 xri = ctxp->ctxbuf->sglq->sli4_xritag;
1883
1884                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1885                 spin_unlock_irqrestore(&phba->hbalock, iflag);
1886
1887                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
1888                 ctxp->flag |= LPFC_NVME_ABTS_RCV;
1889                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1890
1891                 lpfc_nvmeio_data(phba,
1892                         "NVMET ABTS RCV: xri x%x CPU %02x rjt %d\n",
1893                         xri, raw_smp_processor_id(), 0);
1894
1895                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1896                                 "6319 NVMET Rcv ABTS:acc xri x%x\n", xri);
1897
1898                 rsp = &ctxp->hdlrctx.fcp_req;
1899                 nvmet_fc_rcv_fcp_abort(phba->targetport, rsp);
1900
1901                 /* Respond with BA_ACC accordingly */
1902                 lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 1);
1903                 return 0;
1904         }
1905         spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1906         spin_unlock_irqrestore(&phba->hbalock, iflag);
1907
1908         /* check the wait list */
1909         if (phba->sli4_hba.nvmet_io_wait_cnt) {
1910                 struct rqb_dmabuf *nvmebuf;
1911                 struct fc_frame_header *fc_hdr_tmp;
1912                 u32 sid_tmp;
1913                 u16 oxid_tmp;
1914                 bool found = false;
1915
1916                 spin_lock_irqsave(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
1917
1918                 /* match by oxid and s_id */
1919                 list_for_each_entry(nvmebuf,
1920                                     &phba->sli4_hba.lpfc_nvmet_io_wait_list,
1921                                     hbuf.list) {
1922                         fc_hdr_tmp = (struct fc_frame_header *)
1923                                         (nvmebuf->hbuf.virt);
1924                         oxid_tmp = be16_to_cpu(fc_hdr_tmp->fh_ox_id);
1925                         sid_tmp = sli4_sid_from_fc_hdr(fc_hdr_tmp);
1926                         if (oxid_tmp != oxid || sid_tmp != sid)
1927                                 continue;
1928
1929                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1930                                         "6321 NVMET Rcv ABTS oxid x%x from x%x "
1931                                         "is waiting for a ctxp\n",
1932                                         oxid, sid);
1933
1934                         list_del_init(&nvmebuf->hbuf.list);
1935                         phba->sli4_hba.nvmet_io_wait_cnt--;
1936                         found = true;
1937                         break;
1938                 }
1939                 spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock,
1940                                        iflag);
1941
1942                 /* free buffer since already posted a new DMA buffer to RQ */
1943                 if (found) {
1944                         nvmebuf->hrq->rqbp->rqb_free_buffer(phba, nvmebuf);
1945                         /* Respond with BA_ACC accordingly */
1946                         lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 1);
1947                         return 0;
1948                 }
1949         }
1950
1951         /* check active list */
1952         ctxp = lpfc_nvmet_get_ctx_for_oxid(phba, oxid, sid);
1953         if (ctxp) {
1954                 xri = ctxp->ctxbuf->sglq->sli4_xritag;
1955
1956                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
1957                 ctxp->flag |= (LPFC_NVME_ABTS_RCV | LPFC_NVME_ABORT_OP);
1958                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1959
1960                 lpfc_nvmeio_data(phba,
1961                                  "NVMET ABTS RCV: xri x%x CPU %02x rjt %d\n",
1962                                  xri, raw_smp_processor_id(), 0);
1963
1964                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1965                                 "6322 NVMET Rcv ABTS:acc oxid x%x xri x%x "
1966                                 "flag x%x state x%x\n",
1967                                 ctxp->oxid, xri, ctxp->flag, ctxp->state);
1968
1969                 if (ctxp->flag & LPFC_NVME_TNOTIFY) {
1970                         /* Notify the transport */
1971                         nvmet_fc_rcv_fcp_abort(phba->targetport,
1972                                                &ctxp->hdlrctx.fcp_req);
1973                 } else {
1974                         cancel_work_sync(&ctxp->ctxbuf->defer_work);
1975                         spin_lock_irqsave(&ctxp->ctxlock, iflag);
1976                         lpfc_nvmet_defer_release(phba, ctxp);
1977                         spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1978                 }
1979                 lpfc_nvmet_sol_fcp_issue_abort(phba, ctxp, ctxp->sid,
1980                                                ctxp->oxid);
1981
1982                 lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 1);
1983                 return 0;
1984         }
1985
1986         lpfc_nvmeio_data(phba, "NVMET ABTS RCV: oxid x%x CPU %02x rjt %d\n",
1987                          oxid, raw_smp_processor_id(), 1);
1988
1989         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1990                         "6320 NVMET Rcv ABTS:rjt oxid x%x\n", oxid);
1991
1992         /* Respond with BA_RJT accordingly */
1993         lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 0);
1994 #endif
1995         return 0;
1996 }
1997
1998 static void
1999 lpfc_nvmet_wqfull_flush(struct lpfc_hba *phba, struct lpfc_queue *wq,
2000                         struct lpfc_async_xchg_ctx *ctxp)
2001 {
2002         struct lpfc_sli_ring *pring;
2003         struct lpfc_iocbq *nvmewqeq;
2004         struct lpfc_iocbq *next_nvmewqeq;
2005         unsigned long iflags;
2006         struct lpfc_wcqe_complete wcqe;
2007         struct lpfc_wcqe_complete *wcqep;
2008
2009         pring = wq->pring;
2010         wcqep = &wcqe;
2011
2012         /* Fake an ABORT error code back to cmpl routine */
2013         memset(wcqep, 0, sizeof(struct lpfc_wcqe_complete));
2014         bf_set(lpfc_wcqe_c_status, wcqep, IOSTAT_LOCAL_REJECT);
2015         wcqep->parameter = IOERR_ABORT_REQUESTED;
2016
2017         spin_lock_irqsave(&pring->ring_lock, iflags);
2018         list_for_each_entry_safe(nvmewqeq, next_nvmewqeq,
2019                                  &wq->wqfull_list, list) {
2020                 if (ctxp) {
2021                         /* Checking for a specific IO to flush */
2022                         if (nvmewqeq->context2 == ctxp) {
2023                                 list_del(&nvmewqeq->list);
2024                                 spin_unlock_irqrestore(&pring->ring_lock,
2025                                                        iflags);
2026                                 lpfc_nvmet_xmt_fcp_op_cmp(phba, nvmewqeq,
2027                                                           wcqep);
2028                                 return;
2029                         }
2030                         continue;
2031                 } else {
2032                         /* Flush all IOs */
2033                         list_del(&nvmewqeq->list);
2034                         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2035                         lpfc_nvmet_xmt_fcp_op_cmp(phba, nvmewqeq, wcqep);
2036                         spin_lock_irqsave(&pring->ring_lock, iflags);
2037                 }
2038         }
2039         if (!ctxp)
2040                 wq->q_flag &= ~HBA_NVMET_WQFULL;
2041         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2042 }
2043
2044 void
2045 lpfc_nvmet_wqfull_process(struct lpfc_hba *phba,
2046                           struct lpfc_queue *wq)
2047 {
2048 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2049         struct lpfc_sli_ring *pring;
2050         struct lpfc_iocbq *nvmewqeq;
2051         struct lpfc_async_xchg_ctx *ctxp;
2052         unsigned long iflags;
2053         int rc;
2054
2055         /*
2056          * Some WQE slots are available, so try to re-issue anything
2057          * on the WQ wqfull_list.
2058          */
2059         pring = wq->pring;
2060         spin_lock_irqsave(&pring->ring_lock, iflags);
2061         while (!list_empty(&wq->wqfull_list)) {
2062                 list_remove_head(&wq->wqfull_list, nvmewqeq, struct lpfc_iocbq,
2063                                  list);
2064                 spin_unlock_irqrestore(&pring->ring_lock, iflags);
2065                 ctxp = (struct lpfc_async_xchg_ctx *)nvmewqeq->context2;
2066                 rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, nvmewqeq);
2067                 spin_lock_irqsave(&pring->ring_lock, iflags);
2068                 if (rc == -EBUSY) {
2069                         /* WQ was full again, so put it back on the list */
2070                         list_add(&nvmewqeq->list, &wq->wqfull_list);
2071                         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2072                         return;
2073                 }
2074                 if (rc == WQE_SUCCESS) {
2075 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2076                         if (ctxp->ts_cmd_nvme) {
2077                                 if (ctxp->hdlrctx.fcp_req.op == NVMET_FCOP_RSP)
2078                                         ctxp->ts_status_wqput = ktime_get_ns();
2079                                 else
2080                                         ctxp->ts_data_wqput = ktime_get_ns();
2081                         }
2082 #endif
2083                 } else {
2084                         WARN_ON(rc);
2085                 }
2086         }
2087         wq->q_flag &= ~HBA_NVMET_WQFULL;
2088         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2089
2090 #endif
2091 }
2092
2093 void
2094 lpfc_nvmet_destroy_targetport(struct lpfc_hba *phba)
2095 {
2096 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2097         struct lpfc_nvmet_tgtport *tgtp;
2098         struct lpfc_queue *wq;
2099         uint32_t qidx;
2100         DECLARE_COMPLETION_ONSTACK(tport_unreg_cmp);
2101
2102         if (phba->nvmet_support == 0)
2103                 return;
2104         if (phba->targetport) {
2105                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2106                 for (qidx = 0; qidx < phba->cfg_hdw_queue; qidx++) {
2107                         wq = phba->sli4_hba.hdwq[qidx].io_wq;
2108                         lpfc_nvmet_wqfull_flush(phba, wq, NULL);
2109                 }
2110                 tgtp->tport_unreg_cmp = &tport_unreg_cmp;
2111                 nvmet_fc_unregister_targetport(phba->targetport);
2112                 if (!wait_for_completion_timeout(&tport_unreg_cmp,
2113                                         msecs_to_jiffies(LPFC_NVMET_WAIT_TMO)))
2114                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2115                                         "6179 Unreg targetport x%px timeout "
2116                                         "reached.\n", phba->targetport);
2117                 lpfc_nvmet_cleanup_io_context(phba);
2118         }
2119         phba->targetport = NULL;
2120 #endif
2121 }
2122
2123 /**
2124  * lpfc_nvmet_handle_lsreq - Process an NVME LS request
2125  * @phba: pointer to lpfc hba data structure.
2126  * @axchg: pointer to exchange context for the NVME LS request
2127  *
2128  * This routine is used for processing an asychronously received NVME LS
2129  * request. Any remaining validation is done and the LS is then forwarded
2130  * to the nvmet-fc transport via nvmet_fc_rcv_ls_req().
2131  *
2132  * The calling sequence should be: nvmet_fc_rcv_ls_req() -> (processing)
2133  * -> lpfc_nvmet_xmt_ls_rsp/cmp -> req->done.
2134  * lpfc_nvme_xmt_ls_rsp_cmp should free the allocated axchg.
2135  *
2136  * Returns 0 if LS was handled and delivered to the transport
2137  * Returns 1 if LS failed to be handled and should be dropped
2138  */
2139 int
2140 lpfc_nvmet_handle_lsreq(struct lpfc_hba *phba,
2141                         struct lpfc_async_xchg_ctx *axchg)
2142 {
2143 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2144         struct lpfc_nvmet_tgtport *tgtp = phba->targetport->private;
2145         uint32_t *payload = axchg->payload;
2146         int rc;
2147
2148         atomic_inc(&tgtp->rcv_ls_req_in);
2149
2150         /*
2151          * Driver passes the ndlp as the hosthandle argument allowing
2152          * the transport to generate LS requests for any associateions
2153          * that are created.
2154          */
2155         rc = nvmet_fc_rcv_ls_req(phba->targetport, axchg->ndlp, &axchg->ls_rsp,
2156                                  axchg->payload, axchg->size);
2157
2158         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
2159                         "6037 NVMET Unsol rcv: sz %d rc %d: %08x %08x %08x "
2160                         "%08x %08x %08x\n", axchg->size, rc,
2161                         *payload, *(payload+1), *(payload+2),
2162                         *(payload+3), *(payload+4), *(payload+5));
2163
2164         if (!rc) {
2165                 atomic_inc(&tgtp->rcv_ls_req_out);
2166                 return 0;
2167         }
2168
2169         atomic_inc(&tgtp->rcv_ls_req_drop);
2170 #endif
2171         return 1;
2172 }
2173
2174 static void
2175 lpfc_nvmet_process_rcv_fcp_req(struct lpfc_nvmet_ctxbuf *ctx_buf)
2176 {
2177 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2178         struct lpfc_async_xchg_ctx *ctxp = ctx_buf->context;
2179         struct lpfc_hba *phba = ctxp->phba;
2180         struct rqb_dmabuf *nvmebuf = ctxp->rqb_buffer;
2181         struct lpfc_nvmet_tgtport *tgtp;
2182         uint32_t *payload, qno;
2183         uint32_t rc;
2184         unsigned long iflags;
2185
2186         if (!nvmebuf) {
2187                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2188                         "6159 process_rcv_fcp_req, nvmebuf is NULL, "
2189                         "oxid: x%x flg: x%x state: x%x\n",
2190                         ctxp->oxid, ctxp->flag, ctxp->state);
2191                 spin_lock_irqsave(&ctxp->ctxlock, iflags);
2192                 lpfc_nvmet_defer_release(phba, ctxp);
2193                 spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2194                 lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid,
2195                                                  ctxp->oxid);
2196                 return;
2197         }
2198
2199         if (ctxp->flag & LPFC_NVME_ABTS_RCV) {
2200                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2201                                 "6324 IO oxid x%x aborted\n",
2202                                 ctxp->oxid);
2203                 return;
2204         }
2205
2206         payload = (uint32_t *)(nvmebuf->dbuf.virt);
2207         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2208         ctxp->flag |= LPFC_NVME_TNOTIFY;
2209 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2210         if (ctxp->ts_isr_cmd)
2211                 ctxp->ts_cmd_nvme = ktime_get_ns();
2212 #endif
2213         /*
2214          * The calling sequence should be:
2215          * nvmet_fc_rcv_fcp_req->lpfc_nvmet_xmt_fcp_op/cmp- req->done
2216          * lpfc_nvmet_xmt_fcp_op_cmp should free the allocated ctxp.
2217          * When we return from nvmet_fc_rcv_fcp_req, all relevant info
2218          * the NVME command / FC header is stored.
2219          * A buffer has already been reposted for this IO, so just free
2220          * the nvmebuf.
2221          */
2222         rc = nvmet_fc_rcv_fcp_req(phba->targetport, &ctxp->hdlrctx.fcp_req,
2223                                   payload, ctxp->size);
2224         /* Process FCP command */
2225         if (rc == 0) {
2226                 atomic_inc(&tgtp->rcv_fcp_cmd_out);
2227                 spin_lock_irqsave(&ctxp->ctxlock, iflags);
2228                 if ((ctxp->flag & LPFC_NVME_CTX_REUSE_WQ) ||
2229                     (nvmebuf != ctxp->rqb_buffer)) {
2230                         spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2231                         return;
2232                 }
2233                 ctxp->rqb_buffer = NULL;
2234                 spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2235                 lpfc_rq_buf_free(phba, &nvmebuf->hbuf); /* repost */
2236                 return;
2237         }
2238
2239         /* Processing of FCP command is deferred */
2240         if (rc == -EOVERFLOW) {
2241                 lpfc_nvmeio_data(phba, "NVMET RCV BUSY: xri x%x sz %d "
2242                                  "from %06x\n",
2243                                  ctxp->oxid, ctxp->size, ctxp->sid);
2244                 atomic_inc(&tgtp->rcv_fcp_cmd_out);
2245                 atomic_inc(&tgtp->defer_fod);
2246                 spin_lock_irqsave(&ctxp->ctxlock, iflags);
2247                 if (ctxp->flag & LPFC_NVME_CTX_REUSE_WQ) {
2248                         spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2249                         return;
2250                 }
2251                 spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2252                 /*
2253                  * Post a replacement DMA buffer to RQ and defer
2254                  * freeing rcv buffer till .defer_rcv callback
2255                  */
2256                 qno = nvmebuf->idx;
2257                 lpfc_post_rq_buffer(
2258                         phba, phba->sli4_hba.nvmet_mrq_hdr[qno],
2259                         phba->sli4_hba.nvmet_mrq_data[qno], 1, qno);
2260                 return;
2261         }
2262         ctxp->flag &= ~LPFC_NVME_TNOTIFY;
2263         atomic_inc(&tgtp->rcv_fcp_cmd_drop);
2264         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2265                         "2582 FCP Drop IO x%x: err x%x: x%x x%x x%x\n",
2266                         ctxp->oxid, rc,
2267                         atomic_read(&tgtp->rcv_fcp_cmd_in),
2268                         atomic_read(&tgtp->rcv_fcp_cmd_out),
2269                         atomic_read(&tgtp->xmt_fcp_release));
2270         lpfc_nvmeio_data(phba, "NVMET FCP DROP: xri x%x sz %d from %06x\n",
2271                          ctxp->oxid, ctxp->size, ctxp->sid);
2272         spin_lock_irqsave(&ctxp->ctxlock, iflags);
2273         lpfc_nvmet_defer_release(phba, ctxp);
2274         spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2275         lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid, ctxp->oxid);
2276 #endif
2277 }
2278
2279 static void
2280 lpfc_nvmet_fcp_rqst_defer_work(struct work_struct *work)
2281 {
2282 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2283         struct lpfc_nvmet_ctxbuf *ctx_buf =
2284                 container_of(work, struct lpfc_nvmet_ctxbuf, defer_work);
2285
2286         lpfc_nvmet_process_rcv_fcp_req(ctx_buf);
2287 #endif
2288 }
2289
2290 static struct lpfc_nvmet_ctxbuf *
2291 lpfc_nvmet_replenish_context(struct lpfc_hba *phba,
2292                              struct lpfc_nvmet_ctx_info *current_infop)
2293 {
2294 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2295         struct lpfc_nvmet_ctxbuf *ctx_buf = NULL;
2296         struct lpfc_nvmet_ctx_info *get_infop;
2297         int i;
2298
2299         /*
2300          * The current_infop for the MRQ a NVME command IU was received
2301          * on is empty. Our goal is to replenish this MRQs context
2302          * list from a another CPUs.
2303          *
2304          * First we need to pick a context list to start looking on.
2305          * nvmet_ctx_start_cpu has available context the last time
2306          * we needed to replenish this CPU where nvmet_ctx_next_cpu
2307          * is just the next sequential CPU for this MRQ.
2308          */
2309         if (current_infop->nvmet_ctx_start_cpu)
2310                 get_infop = current_infop->nvmet_ctx_start_cpu;
2311         else
2312                 get_infop = current_infop->nvmet_ctx_next_cpu;
2313
2314         for (i = 0; i < phba->sli4_hba.num_possible_cpu; i++) {
2315                 if (get_infop == current_infop) {
2316                         get_infop = get_infop->nvmet_ctx_next_cpu;
2317                         continue;
2318                 }
2319                 spin_lock(&get_infop->nvmet_ctx_list_lock);
2320
2321                 /* Just take the entire context list, if there are any */
2322                 if (get_infop->nvmet_ctx_list_cnt) {
2323                         list_splice_init(&get_infop->nvmet_ctx_list,
2324                                     &current_infop->nvmet_ctx_list);
2325                         current_infop->nvmet_ctx_list_cnt =
2326                                 get_infop->nvmet_ctx_list_cnt - 1;
2327                         get_infop->nvmet_ctx_list_cnt = 0;
2328                         spin_unlock(&get_infop->nvmet_ctx_list_lock);
2329
2330                         current_infop->nvmet_ctx_start_cpu = get_infop;
2331                         list_remove_head(&current_infop->nvmet_ctx_list,
2332                                          ctx_buf, struct lpfc_nvmet_ctxbuf,
2333                                          list);
2334                         return ctx_buf;
2335                 }
2336
2337                 /* Otherwise, move on to the next CPU for this MRQ */
2338                 spin_unlock(&get_infop->nvmet_ctx_list_lock);
2339                 get_infop = get_infop->nvmet_ctx_next_cpu;
2340         }
2341
2342 #endif
2343         /* Nothing found, all contexts for the MRQ are in-flight */
2344         return NULL;
2345 }
2346
2347 /**
2348  * lpfc_nvmet_unsol_fcp_buffer - Process an unsolicited event data buffer
2349  * @phba: pointer to lpfc hba data structure.
2350  * @idx: relative index of MRQ vector
2351  * @nvmebuf: pointer to lpfc nvme command HBQ data structure.
2352  * @isr_timestamp: in jiffies.
2353  * @cqflag: cq processing information regarding workload.
2354  *
2355  * This routine is used for processing the WQE associated with a unsolicited
2356  * event. It first determines whether there is an existing ndlp that matches
2357  * the DID from the unsolicited WQE. If not, it will create a new one with
2358  * the DID from the unsolicited WQE. The ELS command from the unsolicited
2359  * WQE is then used to invoke the proper routine and to set up proper state
2360  * of the discovery state machine.
2361  **/
2362 static void
2363 lpfc_nvmet_unsol_fcp_buffer(struct lpfc_hba *phba,
2364                             uint32_t idx,
2365                             struct rqb_dmabuf *nvmebuf,
2366                             uint64_t isr_timestamp,
2367                             uint8_t cqflag)
2368 {
2369         struct lpfc_async_xchg_ctx *ctxp;
2370         struct lpfc_nvmet_tgtport *tgtp;
2371         struct fc_frame_header *fc_hdr;
2372         struct lpfc_nvmet_ctxbuf *ctx_buf;
2373         struct lpfc_nvmet_ctx_info *current_infop;
2374         uint32_t size, oxid, sid, qno;
2375         unsigned long iflag;
2376         int current_cpu;
2377
2378         if (!IS_ENABLED(CONFIG_NVME_TARGET_FC))
2379                 return;
2380
2381         ctx_buf = NULL;
2382         if (!nvmebuf || !phba->targetport) {
2383                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2384                                 "6157 NVMET FCP Drop IO\n");
2385                 if (nvmebuf)
2386                         lpfc_rq_buf_free(phba, &nvmebuf->hbuf);
2387                 return;
2388         }
2389
2390         /*
2391          * Get a pointer to the context list for this MRQ based on
2392          * the CPU this MRQ IRQ is associated with. If the CPU association
2393          * changes from our initial assumption, the context list could
2394          * be empty, thus it would need to be replenished with the
2395          * context list from another CPU for this MRQ.
2396          */
2397         current_cpu = raw_smp_processor_id();
2398         current_infop = lpfc_get_ctx_list(phba, current_cpu, idx);
2399         spin_lock_irqsave(&current_infop->nvmet_ctx_list_lock, iflag);
2400         if (current_infop->nvmet_ctx_list_cnt) {
2401                 list_remove_head(&current_infop->nvmet_ctx_list,
2402                                  ctx_buf, struct lpfc_nvmet_ctxbuf, list);
2403                 current_infop->nvmet_ctx_list_cnt--;
2404         } else {
2405                 ctx_buf = lpfc_nvmet_replenish_context(phba, current_infop);
2406         }
2407         spin_unlock_irqrestore(&current_infop->nvmet_ctx_list_lock, iflag);
2408
2409         fc_hdr = (struct fc_frame_header *)(nvmebuf->hbuf.virt);
2410         oxid = be16_to_cpu(fc_hdr->fh_ox_id);
2411         size = nvmebuf->bytes_recv;
2412
2413 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2414         if (phba->hdwqstat_on & LPFC_CHECK_NVMET_IO) {
2415                 this_cpu_inc(phba->sli4_hba.c_stat->rcv_io);
2416                 if (idx != current_cpu)
2417                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
2418                                         "6703 CPU Check rcv: "
2419                                         "cpu %d expect %d\n",
2420                                         current_cpu, idx);
2421         }
2422 #endif
2423
2424         lpfc_nvmeio_data(phba, "NVMET FCP  RCV: xri x%x sz %d CPU %02x\n",
2425                          oxid, size, raw_smp_processor_id());
2426
2427         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2428
2429         if (!ctx_buf) {
2430                 /* Queue this NVME IO to process later */
2431                 spin_lock_irqsave(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
2432                 list_add_tail(&nvmebuf->hbuf.list,
2433                               &phba->sli4_hba.lpfc_nvmet_io_wait_list);
2434                 phba->sli4_hba.nvmet_io_wait_cnt++;
2435                 phba->sli4_hba.nvmet_io_wait_total++;
2436                 spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock,
2437                                        iflag);
2438
2439                 /* Post a brand new DMA buffer to RQ */
2440                 qno = nvmebuf->idx;
2441                 lpfc_post_rq_buffer(
2442                         phba, phba->sli4_hba.nvmet_mrq_hdr[qno],
2443                         phba->sli4_hba.nvmet_mrq_data[qno], 1, qno);
2444
2445                 atomic_inc(&tgtp->defer_ctx);
2446                 return;
2447         }
2448
2449         sid = sli4_sid_from_fc_hdr(fc_hdr);
2450
2451         ctxp = (struct lpfc_async_xchg_ctx *)ctx_buf->context;
2452         spin_lock_irqsave(&phba->sli4_hba.t_active_list_lock, iflag);
2453         list_add_tail(&ctxp->list, &phba->sli4_hba.t_active_ctx_list);
2454         spin_unlock_irqrestore(&phba->sli4_hba.t_active_list_lock, iflag);
2455         if (ctxp->state != LPFC_NVME_STE_FREE) {
2456                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2457                                 "6414 NVMET Context corrupt %d %d oxid x%x\n",
2458                                 ctxp->state, ctxp->entry_cnt, ctxp->oxid);
2459         }
2460         ctxp->wqeq = NULL;
2461         ctxp->offset = 0;
2462         ctxp->phba = phba;
2463         ctxp->size = size;
2464         ctxp->oxid = oxid;
2465         ctxp->sid = sid;
2466         ctxp->idx = idx;
2467         ctxp->state = LPFC_NVME_STE_RCV;
2468         ctxp->entry_cnt = 1;
2469         ctxp->flag = 0;
2470         ctxp->ctxbuf = ctx_buf;
2471         ctxp->rqb_buffer = (void *)nvmebuf;
2472         ctxp->hdwq = NULL;
2473         spin_lock_init(&ctxp->ctxlock);
2474
2475 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2476         if (isr_timestamp)
2477                 ctxp->ts_isr_cmd = isr_timestamp;
2478         ctxp->ts_cmd_nvme = 0;
2479         ctxp->ts_nvme_data = 0;
2480         ctxp->ts_data_wqput = 0;
2481         ctxp->ts_isr_data = 0;
2482         ctxp->ts_data_nvme = 0;
2483         ctxp->ts_nvme_status = 0;
2484         ctxp->ts_status_wqput = 0;
2485         ctxp->ts_isr_status = 0;
2486         ctxp->ts_status_nvme = 0;
2487 #endif
2488
2489         atomic_inc(&tgtp->rcv_fcp_cmd_in);
2490         /* check for cq processing load */
2491         if (!cqflag) {
2492                 lpfc_nvmet_process_rcv_fcp_req(ctx_buf);
2493                 return;
2494         }
2495
2496         if (!queue_work(phba->wq, &ctx_buf->defer_work)) {
2497                 atomic_inc(&tgtp->rcv_fcp_cmd_drop);
2498                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2499                                 "6325 Unable to queue work for oxid x%x. "
2500                                 "FCP Drop IO [x%x x%x x%x]\n",
2501                                 ctxp->oxid,
2502                                 atomic_read(&tgtp->rcv_fcp_cmd_in),
2503                                 atomic_read(&tgtp->rcv_fcp_cmd_out),
2504                                 atomic_read(&tgtp->xmt_fcp_release));
2505
2506                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
2507                 lpfc_nvmet_defer_release(phba, ctxp);
2508                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
2509                 lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, sid, oxid);
2510         }
2511 }
2512
2513 /**
2514  * lpfc_nvmet_unsol_fcp_event - Process an unsolicited event from an nvme nport
2515  * @phba: pointer to lpfc hba data structure.
2516  * @idx: relative index of MRQ vector
2517  * @nvmebuf: pointer to received nvme data structure.
2518  * @isr_timestamp: in jiffies.
2519  * @cqflag: cq processing information regarding workload.
2520  *
2521  * This routine is used to process an unsolicited event received from a SLI
2522  * (Service Level Interface) ring. The actual processing of the data buffer
2523  * associated with the unsolicited event is done by invoking the routine
2524  * lpfc_nvmet_unsol_fcp_buffer() after properly set up the buffer from the
2525  * SLI RQ on which the unsolicited event was received.
2526  **/
2527 void
2528 lpfc_nvmet_unsol_fcp_event(struct lpfc_hba *phba,
2529                            uint32_t idx,
2530                            struct rqb_dmabuf *nvmebuf,
2531                            uint64_t isr_timestamp,
2532                            uint8_t cqflag)
2533 {
2534         if (!nvmebuf) {
2535                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2536                                 "3167 NVMET FCP Drop IO\n");
2537                 return;
2538         }
2539         if (phba->nvmet_support == 0) {
2540                 lpfc_rq_buf_free(phba, &nvmebuf->hbuf);
2541                 return;
2542         }
2543         lpfc_nvmet_unsol_fcp_buffer(phba, idx, nvmebuf, isr_timestamp, cqflag);
2544 }
2545
2546 /**
2547  * lpfc_nvmet_prep_ls_wqe - Allocate and prepare a lpfc wqe data structure
2548  * @phba: pointer to a host N_Port data structure.
2549  * @ctxp: Context info for NVME LS Request
2550  * @rspbuf: DMA buffer of NVME command.
2551  * @rspsize: size of the NVME command.
2552  *
2553  * This routine is used for allocating a lpfc-WQE data structure from
2554  * the driver lpfc-WQE free-list and prepare the WQE with the parameters
2555  * passed into the routine for discovery state machine to issue an Extended
2556  * Link Service (NVME) commands. It is a generic lpfc-WQE allocation
2557  * and preparation routine that is used by all the discovery state machine
2558  * routines and the NVME command-specific fields will be later set up by
2559  * the individual discovery machine routines after calling this routine
2560  * allocating and preparing a generic WQE data structure. It fills in the
2561  * Buffer Descriptor Entries (BDEs), allocates buffers for both command
2562  * payload and response payload (if expected). The reference count on the
2563  * ndlp is incremented by 1 and the reference to the ndlp is put into
2564  * context1 of the WQE data structure for this WQE to hold the ndlp
2565  * reference for the command's callback function to access later.
2566  *
2567  * Return code
2568  *   Pointer to the newly allocated/prepared nvme wqe data structure
2569  *   NULL - when nvme wqe data structure allocation/preparation failed
2570  **/
2571 static struct lpfc_iocbq *
2572 lpfc_nvmet_prep_ls_wqe(struct lpfc_hba *phba,
2573                        struct lpfc_async_xchg_ctx *ctxp,
2574                        dma_addr_t rspbuf, uint16_t rspsize)
2575 {
2576         struct lpfc_nodelist *ndlp;
2577         struct lpfc_iocbq *nvmewqe;
2578         union lpfc_wqe128 *wqe;
2579
2580         if (!lpfc_is_link_up(phba)) {
2581                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2582                                 "6104 NVMET prep LS wqe: link err: "
2583                                 "NPORT x%x oxid:x%x ste %d\n",
2584                                 ctxp->sid, ctxp->oxid, ctxp->state);
2585                 return NULL;
2586         }
2587
2588         /* Allocate buffer for  command wqe */
2589         nvmewqe = lpfc_sli_get_iocbq(phba);
2590         if (nvmewqe == NULL) {
2591                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2592                                 "6105 NVMET prep LS wqe: No WQE: "
2593                                 "NPORT x%x oxid x%x ste %d\n",
2594                                 ctxp->sid, ctxp->oxid, ctxp->state);
2595                 return NULL;
2596         }
2597
2598         ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
2599         if (!ndlp ||
2600             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
2601             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
2602                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2603                                 "6106 NVMET prep LS wqe: No ndlp: "
2604                                 "NPORT x%x oxid x%x ste %d\n",
2605                                 ctxp->sid, ctxp->oxid, ctxp->state);
2606                 goto nvme_wqe_free_wqeq_exit;
2607         }
2608         ctxp->wqeq = nvmewqe;
2609
2610         /* prevent preparing wqe with NULL ndlp reference */
2611         nvmewqe->context1 = lpfc_nlp_get(ndlp);
2612         if (nvmewqe->context1 == NULL)
2613                 goto nvme_wqe_free_wqeq_exit;
2614         nvmewqe->context2 = ctxp;
2615
2616         wqe = &nvmewqe->wqe;
2617         memset(wqe, 0, sizeof(union lpfc_wqe));
2618
2619         /* Words 0 - 2 */
2620         wqe->xmit_sequence.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2621         wqe->xmit_sequence.bde.tus.f.bdeSize = rspsize;
2622         wqe->xmit_sequence.bde.addrLow = le32_to_cpu(putPaddrLow(rspbuf));
2623         wqe->xmit_sequence.bde.addrHigh = le32_to_cpu(putPaddrHigh(rspbuf));
2624
2625         /* Word 3 */
2626
2627         /* Word 4 */
2628
2629         /* Word 5 */
2630         bf_set(wqe_dfctl, &wqe->xmit_sequence.wge_ctl, 0);
2631         bf_set(wqe_ls, &wqe->xmit_sequence.wge_ctl, 1);
2632         bf_set(wqe_la, &wqe->xmit_sequence.wge_ctl, 0);
2633         bf_set(wqe_rctl, &wqe->xmit_sequence.wge_ctl, FC_RCTL_ELS4_REP);
2634         bf_set(wqe_type, &wqe->xmit_sequence.wge_ctl, FC_TYPE_NVME);
2635
2636         /* Word 6 */
2637         bf_set(wqe_ctxt_tag, &wqe->xmit_sequence.wqe_com,
2638                phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2639         bf_set(wqe_xri_tag, &wqe->xmit_sequence.wqe_com, nvmewqe->sli4_xritag);
2640
2641         /* Word 7 */
2642         bf_set(wqe_cmnd, &wqe->xmit_sequence.wqe_com,
2643                CMD_XMIT_SEQUENCE64_WQE);
2644         bf_set(wqe_ct, &wqe->xmit_sequence.wqe_com, SLI4_CT_RPI);
2645         bf_set(wqe_class, &wqe->xmit_sequence.wqe_com, CLASS3);
2646         bf_set(wqe_pu, &wqe->xmit_sequence.wqe_com, 0);
2647
2648         /* Word 8 */
2649         wqe->xmit_sequence.wqe_com.abort_tag = nvmewqe->iotag;
2650
2651         /* Word 9 */
2652         bf_set(wqe_reqtag, &wqe->xmit_sequence.wqe_com, nvmewqe->iotag);
2653         /* Needs to be set by caller */
2654         bf_set(wqe_rcvoxid, &wqe->xmit_sequence.wqe_com, ctxp->oxid);
2655
2656         /* Word 10 */
2657         bf_set(wqe_dbde, &wqe->xmit_sequence.wqe_com, 1);
2658         bf_set(wqe_iod, &wqe->xmit_sequence.wqe_com, LPFC_WQE_IOD_WRITE);
2659         bf_set(wqe_lenloc, &wqe->xmit_sequence.wqe_com,
2660                LPFC_WQE_LENLOC_WORD12);
2661         bf_set(wqe_ebde_cnt, &wqe->xmit_sequence.wqe_com, 0);
2662
2663         /* Word 11 */
2664         bf_set(wqe_cqid, &wqe->xmit_sequence.wqe_com,
2665                LPFC_WQE_CQ_ID_DEFAULT);
2666         bf_set(wqe_cmd_type, &wqe->xmit_sequence.wqe_com,
2667                OTHER_COMMAND);
2668
2669         /* Word 12 */
2670         wqe->xmit_sequence.xmit_len = rspsize;
2671
2672         nvmewqe->retry = 1;
2673         nvmewqe->vport = phba->pport;
2674         nvmewqe->drvrTimeout = (phba->fc_ratov * 3) + LPFC_DRVR_TIMEOUT;
2675         nvmewqe->iocb_flag |= LPFC_IO_NVME_LS;
2676
2677         /* Xmit NVMET response to remote NPORT <did> */
2678         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
2679                         "6039 Xmit NVMET LS response to remote "
2680                         "NPORT x%x iotag:x%x oxid:x%x size:x%x\n",
2681                         ndlp->nlp_DID, nvmewqe->iotag, ctxp->oxid,
2682                         rspsize);
2683         return nvmewqe;
2684
2685 nvme_wqe_free_wqeq_exit:
2686         nvmewqe->context2 = NULL;
2687         nvmewqe->context3 = NULL;
2688         lpfc_sli_release_iocbq(phba, nvmewqe);
2689         return NULL;
2690 }
2691
2692
2693 static struct lpfc_iocbq *
2694 lpfc_nvmet_prep_fcp_wqe(struct lpfc_hba *phba,
2695                         struct lpfc_async_xchg_ctx *ctxp)
2696 {
2697         struct nvmefc_tgt_fcp_req *rsp = &ctxp->hdlrctx.fcp_req;
2698         struct lpfc_nvmet_tgtport *tgtp;
2699         struct sli4_sge *sgl;
2700         struct lpfc_nodelist *ndlp;
2701         struct lpfc_iocbq *nvmewqe;
2702         struct scatterlist *sgel;
2703         union lpfc_wqe128 *wqe;
2704         struct ulp_bde64 *bde;
2705         dma_addr_t physaddr;
2706         int i, cnt, nsegs;
2707         int do_pbde;
2708         int xc = 1;
2709
2710         if (!lpfc_is_link_up(phba)) {
2711                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2712                                 "6107 NVMET prep FCP wqe: link err:"
2713                                 "NPORT x%x oxid x%x ste %d\n",
2714                                 ctxp->sid, ctxp->oxid, ctxp->state);
2715                 return NULL;
2716         }
2717
2718         ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
2719         if (!ndlp ||
2720             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
2721              (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
2722                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2723                                 "6108 NVMET prep FCP wqe: no ndlp: "
2724                                 "NPORT x%x oxid x%x ste %d\n",
2725                                 ctxp->sid, ctxp->oxid, ctxp->state);
2726                 return NULL;
2727         }
2728
2729         if (rsp->sg_cnt > lpfc_tgttemplate.max_sgl_segments) {
2730                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2731                                 "6109 NVMET prep FCP wqe: seg cnt err: "
2732                                 "NPORT x%x oxid x%x ste %d cnt %d\n",
2733                                 ctxp->sid, ctxp->oxid, ctxp->state,
2734                                 phba->cfg_nvme_seg_cnt);
2735                 return NULL;
2736         }
2737         nsegs = rsp->sg_cnt;
2738
2739         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2740         nvmewqe = ctxp->wqeq;
2741         if (nvmewqe == NULL) {
2742                 /* Allocate buffer for  command wqe */
2743                 nvmewqe = ctxp->ctxbuf->iocbq;
2744                 if (nvmewqe == NULL) {
2745                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2746                                         "6110 NVMET prep FCP wqe: No "
2747                                         "WQE: NPORT x%x oxid x%x ste %d\n",
2748                                         ctxp->sid, ctxp->oxid, ctxp->state);
2749                         return NULL;
2750                 }
2751                 ctxp->wqeq = nvmewqe;
2752                 xc = 0; /* create new XRI */
2753                 nvmewqe->sli4_lxritag = NO_XRI;
2754                 nvmewqe->sli4_xritag = NO_XRI;
2755         }
2756
2757         /* Sanity check */
2758         if (((ctxp->state == LPFC_NVME_STE_RCV) &&
2759             (ctxp->entry_cnt == 1)) ||
2760             (ctxp->state == LPFC_NVME_STE_DATA)) {
2761                 wqe = &nvmewqe->wqe;
2762         } else {
2763                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2764                                 "6111 Wrong state NVMET FCP: %d  cnt %d\n",
2765                                 ctxp->state, ctxp->entry_cnt);
2766                 return NULL;
2767         }
2768
2769         sgl  = (struct sli4_sge *)ctxp->ctxbuf->sglq->sgl;
2770         switch (rsp->op) {
2771         case NVMET_FCOP_READDATA:
2772         case NVMET_FCOP_READDATA_RSP:
2773                 /* From the tsend template, initialize words 7 - 11 */
2774                 memcpy(&wqe->words[7],
2775                        &lpfc_tsend_cmd_template.words[7],
2776                        sizeof(uint32_t) * 5);
2777
2778                 /* Words 0 - 2 : The first sg segment */
2779                 sgel = &rsp->sg[0];
2780                 physaddr = sg_dma_address(sgel);
2781                 wqe->fcp_tsend.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2782                 wqe->fcp_tsend.bde.tus.f.bdeSize = sg_dma_len(sgel);
2783                 wqe->fcp_tsend.bde.addrLow = cpu_to_le32(putPaddrLow(physaddr));
2784                 wqe->fcp_tsend.bde.addrHigh =
2785                         cpu_to_le32(putPaddrHigh(physaddr));
2786
2787                 /* Word 3 */
2788                 wqe->fcp_tsend.payload_offset_len = 0;
2789
2790                 /* Word 4 */
2791                 wqe->fcp_tsend.relative_offset = ctxp->offset;
2792
2793                 /* Word 5 */
2794                 wqe->fcp_tsend.reserved = 0;
2795
2796                 /* Word 6 */
2797                 bf_set(wqe_ctxt_tag, &wqe->fcp_tsend.wqe_com,
2798                        phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2799                 bf_set(wqe_xri_tag, &wqe->fcp_tsend.wqe_com,
2800                        nvmewqe->sli4_xritag);
2801
2802                 /* Word 7 - set ar later */
2803
2804                 /* Word 8 */
2805                 wqe->fcp_tsend.wqe_com.abort_tag = nvmewqe->iotag;
2806
2807                 /* Word 9 */
2808                 bf_set(wqe_reqtag, &wqe->fcp_tsend.wqe_com, nvmewqe->iotag);
2809                 bf_set(wqe_rcvoxid, &wqe->fcp_tsend.wqe_com, ctxp->oxid);
2810
2811                 /* Word 10 - set wqes later, in template xc=1 */
2812                 if (!xc)
2813                         bf_set(wqe_xc, &wqe->fcp_tsend.wqe_com, 0);
2814
2815                 /* Word 11 - set sup, irsp, irsplen later */
2816                 do_pbde = 0;
2817
2818                 /* Word 12 */
2819                 wqe->fcp_tsend.fcp_data_len = rsp->transfer_length;
2820
2821                 /* Setup 2 SKIP SGEs */
2822                 sgl->addr_hi = 0;
2823                 sgl->addr_lo = 0;
2824                 sgl->word2 = 0;
2825                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2826                 sgl->word2 = cpu_to_le32(sgl->word2);
2827                 sgl->sge_len = 0;
2828                 sgl++;
2829                 sgl->addr_hi = 0;
2830                 sgl->addr_lo = 0;
2831                 sgl->word2 = 0;
2832                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2833                 sgl->word2 = cpu_to_le32(sgl->word2);
2834                 sgl->sge_len = 0;
2835                 sgl++;
2836                 if (rsp->op == NVMET_FCOP_READDATA_RSP) {
2837                         atomic_inc(&tgtp->xmt_fcp_read_rsp);
2838
2839                         /* In template ar=1 wqes=0 sup=0 irsp=0 irsplen=0 */
2840
2841                         if (rsp->rsplen == LPFC_NVMET_SUCCESS_LEN) {
2842                                 if (ndlp->nlp_flag & NLP_SUPPRESS_RSP)
2843                                         bf_set(wqe_sup,
2844                                                &wqe->fcp_tsend.wqe_com, 1);
2845                         } else {
2846                                 bf_set(wqe_wqes, &wqe->fcp_tsend.wqe_com, 1);
2847                                 bf_set(wqe_irsp, &wqe->fcp_tsend.wqe_com, 1);
2848                                 bf_set(wqe_irsplen, &wqe->fcp_tsend.wqe_com,
2849                                        ((rsp->rsplen >> 2) - 1));
2850                                 memcpy(&wqe->words[16], rsp->rspaddr,
2851                                        rsp->rsplen);
2852                         }
2853                 } else {
2854                         atomic_inc(&tgtp->xmt_fcp_read);
2855
2856                         /* In template ar=1 wqes=0 sup=0 irsp=0 irsplen=0 */
2857                         bf_set(wqe_ar, &wqe->fcp_tsend.wqe_com, 0);
2858                 }
2859                 break;
2860
2861         case NVMET_FCOP_WRITEDATA:
2862                 /* From the treceive template, initialize words 3 - 11 */
2863                 memcpy(&wqe->words[3],
2864                        &lpfc_treceive_cmd_template.words[3],
2865                        sizeof(uint32_t) * 9);
2866
2867                 /* Words 0 - 2 : First SGE is skipped, set invalid BDE type */
2868                 wqe->fcp_treceive.bde.tus.f.bdeFlags = LPFC_SGE_TYPE_SKIP;
2869                 wqe->fcp_treceive.bde.tus.f.bdeSize = 0;
2870                 wqe->fcp_treceive.bde.addrLow = 0;
2871                 wqe->fcp_treceive.bde.addrHigh = 0;
2872
2873                 /* Word 4 */
2874                 wqe->fcp_treceive.relative_offset = ctxp->offset;
2875
2876                 /* Word 6 */
2877                 bf_set(wqe_ctxt_tag, &wqe->fcp_treceive.wqe_com,
2878                        phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2879                 bf_set(wqe_xri_tag, &wqe->fcp_treceive.wqe_com,
2880                        nvmewqe->sli4_xritag);
2881
2882                 /* Word 7 */
2883
2884                 /* Word 8 */
2885                 wqe->fcp_treceive.wqe_com.abort_tag = nvmewqe->iotag;
2886
2887                 /* Word 9 */
2888                 bf_set(wqe_reqtag, &wqe->fcp_treceive.wqe_com, nvmewqe->iotag);
2889                 bf_set(wqe_rcvoxid, &wqe->fcp_treceive.wqe_com, ctxp->oxid);
2890
2891                 /* Word 10 - in template xc=1 */
2892                 if (!xc)
2893                         bf_set(wqe_xc, &wqe->fcp_treceive.wqe_com, 0);
2894
2895                 /* Word 11 - set pbde later */
2896                 if (phba->cfg_enable_pbde) {
2897                         do_pbde = 1;
2898                 } else {
2899                         bf_set(wqe_pbde, &wqe->fcp_treceive.wqe_com, 0);
2900                         do_pbde = 0;
2901                 }
2902
2903                 /* Word 12 */
2904                 wqe->fcp_tsend.fcp_data_len = rsp->transfer_length;
2905
2906                 /* Setup 2 SKIP SGEs */
2907                 sgl->addr_hi = 0;
2908                 sgl->addr_lo = 0;
2909                 sgl->word2 = 0;
2910                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2911                 sgl->word2 = cpu_to_le32(sgl->word2);
2912                 sgl->sge_len = 0;
2913                 sgl++;
2914                 sgl->addr_hi = 0;
2915                 sgl->addr_lo = 0;
2916                 sgl->word2 = 0;
2917                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2918                 sgl->word2 = cpu_to_le32(sgl->word2);
2919                 sgl->sge_len = 0;
2920                 sgl++;
2921                 atomic_inc(&tgtp->xmt_fcp_write);
2922                 break;
2923
2924         case NVMET_FCOP_RSP:
2925                 /* From the treceive template, initialize words 4 - 11 */
2926                 memcpy(&wqe->words[4],
2927                        &lpfc_trsp_cmd_template.words[4],
2928                        sizeof(uint32_t) * 8);
2929
2930                 /* Words 0 - 2 */
2931                 physaddr = rsp->rspdma;
2932                 wqe->fcp_trsp.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2933                 wqe->fcp_trsp.bde.tus.f.bdeSize = rsp->rsplen;
2934                 wqe->fcp_trsp.bde.addrLow =
2935                         cpu_to_le32(putPaddrLow(physaddr));
2936                 wqe->fcp_trsp.bde.addrHigh =
2937                         cpu_to_le32(putPaddrHigh(physaddr));
2938
2939                 /* Word 3 */
2940                 wqe->fcp_trsp.response_len = rsp->rsplen;
2941
2942                 /* Word 6 */
2943                 bf_set(wqe_ctxt_tag, &wqe->fcp_trsp.wqe_com,
2944                        phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2945                 bf_set(wqe_xri_tag, &wqe->fcp_trsp.wqe_com,
2946                        nvmewqe->sli4_xritag);
2947
2948                 /* Word 7 */
2949
2950                 /* Word 8 */
2951                 wqe->fcp_trsp.wqe_com.abort_tag = nvmewqe->iotag;
2952
2953                 /* Word 9 */
2954                 bf_set(wqe_reqtag, &wqe->fcp_trsp.wqe_com, nvmewqe->iotag);
2955                 bf_set(wqe_rcvoxid, &wqe->fcp_trsp.wqe_com, ctxp->oxid);
2956
2957                 /* Word 10 */
2958                 if (xc)
2959                         bf_set(wqe_xc, &wqe->fcp_trsp.wqe_com, 1);
2960
2961                 /* Word 11 */
2962                 /* In template wqes=0 irsp=0 irsplen=0 - good response */
2963                 if (rsp->rsplen != LPFC_NVMET_SUCCESS_LEN) {
2964                         /* Bad response - embed it */
2965                         bf_set(wqe_wqes, &wqe->fcp_trsp.wqe_com, 1);
2966                         bf_set(wqe_irsp, &wqe->fcp_trsp.wqe_com, 1);
2967                         bf_set(wqe_irsplen, &wqe->fcp_trsp.wqe_com,
2968                                ((rsp->rsplen >> 2) - 1));
2969                         memcpy(&wqe->words[16], rsp->rspaddr, rsp->rsplen);
2970                 }
2971                 do_pbde = 0;
2972
2973                 /* Word 12 */
2974                 wqe->fcp_trsp.rsvd_12_15[0] = 0;
2975
2976                 /* Use rspbuf, NOT sg list */
2977                 nsegs = 0;
2978                 sgl->word2 = 0;
2979                 atomic_inc(&tgtp->xmt_fcp_rsp);
2980                 break;
2981
2982         default:
2983                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
2984                                 "6064 Unknown Rsp Op %d\n",
2985                                 rsp->op);
2986                 return NULL;
2987         }
2988
2989         nvmewqe->retry = 1;
2990         nvmewqe->vport = phba->pport;
2991         nvmewqe->drvrTimeout = (phba->fc_ratov * 3) + LPFC_DRVR_TIMEOUT;
2992         nvmewqe->context1 = ndlp;
2993
2994         for_each_sg(rsp->sg, sgel, nsegs, i) {
2995                 physaddr = sg_dma_address(sgel);
2996                 cnt = sg_dma_len(sgel);
2997                 sgl->addr_hi = putPaddrHigh(physaddr);
2998                 sgl->addr_lo = putPaddrLow(physaddr);
2999                 sgl->word2 = 0;
3000                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
3001                 bf_set(lpfc_sli4_sge_offset, sgl, ctxp->offset);
3002                 if ((i+1) == rsp->sg_cnt)
3003                         bf_set(lpfc_sli4_sge_last, sgl, 1);
3004                 sgl->word2 = cpu_to_le32(sgl->word2);
3005                 sgl->sge_len = cpu_to_le32(cnt);
3006                 if (i == 0) {
3007                         bde = (struct ulp_bde64 *)&wqe->words[13];
3008                         if (do_pbde) {
3009                                 /* Words 13-15  (PBDE) */
3010                                 bde->addrLow = sgl->addr_lo;
3011                                 bde->addrHigh = sgl->addr_hi;
3012                                 bde->tus.f.bdeSize =
3013                                         le32_to_cpu(sgl->sge_len);
3014                                 bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
3015                                 bde->tus.w = cpu_to_le32(bde->tus.w);
3016                         } else {
3017                                 memset(bde, 0, sizeof(struct ulp_bde64));
3018                         }
3019                 }
3020                 sgl++;
3021                 ctxp->offset += cnt;
3022         }
3023         ctxp->state = LPFC_NVME_STE_DATA;
3024         ctxp->entry_cnt++;
3025         return nvmewqe;
3026 }
3027
3028 /**
3029  * lpfc_nvmet_sol_fcp_abort_cmp - Completion handler for ABTS
3030  * @phba: Pointer to HBA context object.
3031  * @cmdwqe: Pointer to driver command WQE object.
3032  * @wcqe: Pointer to driver response CQE object.
3033  *
3034  * The function is called from SLI ring event handler with no
3035  * lock held. This function is the completion handler for NVME ABTS for FCP cmds
3036  * The function frees memory resources used for the NVME commands.
3037  **/
3038 static void
3039 lpfc_nvmet_sol_fcp_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3040                              struct lpfc_wcqe_complete *wcqe)
3041 {
3042         struct lpfc_async_xchg_ctx *ctxp;
3043         struct lpfc_nvmet_tgtport *tgtp;
3044         uint32_t result;
3045         unsigned long flags;
3046         bool released = false;
3047
3048         ctxp = cmdwqe->context2;
3049         result = wcqe->parameter;
3050
3051         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3052         if (ctxp->flag & LPFC_NVME_ABORT_OP)
3053                 atomic_inc(&tgtp->xmt_fcp_abort_cmpl);
3054
3055         spin_lock_irqsave(&ctxp->ctxlock, flags);
3056         ctxp->state = LPFC_NVME_STE_DONE;
3057
3058         /* Check if we already received a free context call
3059          * and we have completed processing an abort situation.
3060          */
3061         if ((ctxp->flag & LPFC_NVME_CTX_RLS) &&
3062             !(ctxp->flag & LPFC_NVME_XBUSY)) {
3063                 spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3064                 list_del_init(&ctxp->list);
3065                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3066                 released = true;
3067         }
3068         ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3069         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3070         atomic_inc(&tgtp->xmt_abort_rsp);
3071
3072         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3073                         "6165 ABORT cmpl: oxid x%x flg x%x (%d) "
3074                         "WCQE: %08x %08x %08x %08x\n",
3075                         ctxp->oxid, ctxp->flag, released,
3076                         wcqe->word0, wcqe->total_data_placed,
3077                         result, wcqe->word3);
3078
3079         cmdwqe->context2 = NULL;
3080         cmdwqe->context3 = NULL;
3081         /*
3082          * if transport has released ctx, then can reuse it. Otherwise,
3083          * will be recycled by transport release call.
3084          */
3085         if (released)
3086                 lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
3087
3088         /* This is the iocbq for the abort, not the command */
3089         lpfc_sli_release_iocbq(phba, cmdwqe);
3090
3091         /* Since iaab/iaar are NOT set, there is no work left.
3092          * For LPFC_NVME_XBUSY, lpfc_sli4_nvmet_xri_aborted
3093          * should have been called already.
3094          */
3095 }
3096
3097 /**
3098  * lpfc_nvmet_unsol_fcp_abort_cmp - Completion handler for ABTS
3099  * @phba: Pointer to HBA context object.
3100  * @cmdwqe: Pointer to driver command WQE object.
3101  * @wcqe: Pointer to driver response CQE object.
3102  *
3103  * The function is called from SLI ring event handler with no
3104  * lock held. This function is the completion handler for NVME ABTS for FCP cmds
3105  * The function frees memory resources used for the NVME commands.
3106  **/
3107 static void
3108 lpfc_nvmet_unsol_fcp_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3109                                struct lpfc_wcqe_complete *wcqe)
3110 {
3111         struct lpfc_async_xchg_ctx *ctxp;
3112         struct lpfc_nvmet_tgtport *tgtp;
3113         unsigned long flags;
3114         uint32_t result;
3115         bool released = false;
3116
3117         ctxp = cmdwqe->context2;
3118         result = wcqe->parameter;
3119
3120         if (!ctxp) {
3121                 /* if context is clear, related io alrady complete */
3122                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3123                                 "6070 ABTS cmpl: WCQE: %08x %08x %08x %08x\n",
3124                                 wcqe->word0, wcqe->total_data_placed,
3125                                 result, wcqe->word3);
3126                 return;
3127         }
3128
3129         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3130         spin_lock_irqsave(&ctxp->ctxlock, flags);
3131         if (ctxp->flag & LPFC_NVME_ABORT_OP)
3132                 atomic_inc(&tgtp->xmt_fcp_abort_cmpl);
3133
3134         /* Sanity check */
3135         if (ctxp->state != LPFC_NVME_STE_ABORT) {
3136                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3137                                 "6112 ABTS Wrong state:%d oxid x%x\n",
3138                                 ctxp->state, ctxp->oxid);
3139         }
3140
3141         /* Check if we already received a free context call
3142          * and we have completed processing an abort situation.
3143          */
3144         ctxp->state = LPFC_NVME_STE_DONE;
3145         if ((ctxp->flag & LPFC_NVME_CTX_RLS) &&
3146             !(ctxp->flag & LPFC_NVME_XBUSY)) {
3147                 spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3148                 list_del_init(&ctxp->list);
3149                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3150                 released = true;
3151         }
3152         ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3153         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3154         atomic_inc(&tgtp->xmt_abort_rsp);
3155
3156         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3157                         "6316 ABTS cmpl oxid x%x flg x%x (%x) "
3158                         "WCQE: %08x %08x %08x %08x\n",
3159                         ctxp->oxid, ctxp->flag, released,
3160                         wcqe->word0, wcqe->total_data_placed,
3161                         result, wcqe->word3);
3162
3163         cmdwqe->context2 = NULL;
3164         cmdwqe->context3 = NULL;
3165         /*
3166          * if transport has released ctx, then can reuse it. Otherwise,
3167          * will be recycled by transport release call.
3168          */
3169         if (released)
3170                 lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
3171
3172         /* Since iaab/iaar are NOT set, there is no work left.
3173          * For LPFC_NVME_XBUSY, lpfc_sli4_nvmet_xri_aborted
3174          * should have been called already.
3175          */
3176 }
3177
3178 /**
3179  * lpfc_nvmet_xmt_ls_abort_cmp - Completion handler for ABTS
3180  * @phba: Pointer to HBA context object.
3181  * @cmdwqe: Pointer to driver command WQE object.
3182  * @wcqe: Pointer to driver response CQE object.
3183  *
3184  * The function is called from SLI ring event handler with no
3185  * lock held. This function is the completion handler for NVME ABTS for LS cmds
3186  * The function frees memory resources used for the NVME commands.
3187  **/
3188 static void
3189 lpfc_nvmet_xmt_ls_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3190                             struct lpfc_wcqe_complete *wcqe)
3191 {
3192         struct lpfc_async_xchg_ctx *ctxp;
3193         struct lpfc_nvmet_tgtport *tgtp;
3194         uint32_t result;
3195
3196         ctxp = cmdwqe->context2;
3197         result = wcqe->parameter;
3198
3199         if (phba->nvmet_support) {
3200                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3201                 atomic_inc(&tgtp->xmt_ls_abort_cmpl);
3202         }
3203
3204         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3205                         "6083 Abort cmpl: ctx x%px WCQE:%08x %08x %08x %08x\n",
3206                         ctxp, wcqe->word0, wcqe->total_data_placed,
3207                         result, wcqe->word3);
3208
3209         if (!ctxp) {
3210                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3211                                 "6415 NVMET LS Abort No ctx: WCQE: "
3212                                  "%08x %08x %08x %08x\n",
3213                                 wcqe->word0, wcqe->total_data_placed,
3214                                 result, wcqe->word3);
3215
3216                 lpfc_sli_release_iocbq(phba, cmdwqe);
3217                 return;
3218         }
3219
3220         if (ctxp->state != LPFC_NVME_STE_LS_ABORT) {
3221                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3222                                 "6416 NVMET LS abort cmpl state mismatch: "
3223                                 "oxid x%x: %d %d\n",
3224                                 ctxp->oxid, ctxp->state, ctxp->entry_cnt);
3225         }
3226
3227         cmdwqe->context2 = NULL;
3228         cmdwqe->context3 = NULL;
3229         lpfc_sli_release_iocbq(phba, cmdwqe);
3230         kfree(ctxp);
3231 }
3232
3233 static int
3234 lpfc_nvmet_unsol_issue_abort(struct lpfc_hba *phba,
3235                              struct lpfc_async_xchg_ctx *ctxp,
3236                              uint32_t sid, uint16_t xri)
3237 {
3238         struct lpfc_nvmet_tgtport *tgtp = NULL;
3239         struct lpfc_iocbq *abts_wqeq;
3240         union lpfc_wqe128 *wqe_abts;
3241         struct lpfc_nodelist *ndlp;
3242
3243         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3244                         "6067 ABTS: sid %x xri x%x/x%x\n",
3245                         sid, xri, ctxp->wqeq->sli4_xritag);
3246
3247         if (phba->nvmet_support && phba->targetport)
3248                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3249
3250         ndlp = lpfc_findnode_did(phba->pport, sid);
3251         if (!ndlp ||
3252             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
3253             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
3254                 if (tgtp)
3255                         atomic_inc(&tgtp->xmt_abort_rsp_error);
3256                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3257                                 "6134 Drop ABTS - wrong NDLP state x%x.\n",
3258                                 (ndlp) ? ndlp->nlp_state : NLP_STE_MAX_STATE);
3259
3260                 /* No failure to an ABTS request. */
3261                 return 0;
3262         }
3263
3264         abts_wqeq = ctxp->wqeq;
3265         wqe_abts = &abts_wqeq->wqe;
3266
3267         /*
3268          * Since we zero the whole WQE, we need to ensure we set the WQE fields
3269          * that were initialized in lpfc_sli4_nvmet_alloc.
3270          */
3271         memset(wqe_abts, 0, sizeof(union lpfc_wqe));
3272
3273         /* Word 5 */
3274         bf_set(wqe_dfctl, &wqe_abts->xmit_sequence.wge_ctl, 0);
3275         bf_set(wqe_ls, &wqe_abts->xmit_sequence.wge_ctl, 1);
3276         bf_set(wqe_la, &wqe_abts->xmit_sequence.wge_ctl, 0);
3277         bf_set(wqe_rctl, &wqe_abts->xmit_sequence.wge_ctl, FC_RCTL_BA_ABTS);
3278         bf_set(wqe_type, &wqe_abts->xmit_sequence.wge_ctl, FC_TYPE_BLS);
3279
3280         /* Word 6 */
3281         bf_set(wqe_ctxt_tag, &wqe_abts->xmit_sequence.wqe_com,
3282                phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
3283         bf_set(wqe_xri_tag, &wqe_abts->xmit_sequence.wqe_com,
3284                abts_wqeq->sli4_xritag);
3285
3286         /* Word 7 */
3287         bf_set(wqe_cmnd, &wqe_abts->xmit_sequence.wqe_com,
3288                CMD_XMIT_SEQUENCE64_WQE);
3289         bf_set(wqe_ct, &wqe_abts->xmit_sequence.wqe_com, SLI4_CT_RPI);
3290         bf_set(wqe_class, &wqe_abts->xmit_sequence.wqe_com, CLASS3);
3291         bf_set(wqe_pu, &wqe_abts->xmit_sequence.wqe_com, 0);
3292
3293         /* Word 8 */
3294         wqe_abts->xmit_sequence.wqe_com.abort_tag = abts_wqeq->iotag;
3295
3296         /* Word 9 */
3297         bf_set(wqe_reqtag, &wqe_abts->xmit_sequence.wqe_com, abts_wqeq->iotag);
3298         /* Needs to be set by caller */
3299         bf_set(wqe_rcvoxid, &wqe_abts->xmit_sequence.wqe_com, xri);
3300
3301         /* Word 10 */
3302         bf_set(wqe_dbde, &wqe_abts->xmit_sequence.wqe_com, 1);
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         struct lpfc_nvmet_tgtport *tgtp;
3648
3649         lpfc_printf_log(phba, KERN_INFO, LOG_NVME | LOG_NVME_ABTS,
3650                         "6203 Invalidating hosthandle x%px\n",
3651                         ndlp);
3652
3653         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3654         atomic_set(&tgtp->state, LPFC_NVMET_INV_HOST_ACTIVE);
3655
3656 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
3657         /* Need to get the nvmet_fc_target_port pointer here.*/
3658         nvmet_fc_invalidate_host(phba->targetport, ndlp);
3659 #endif
3660 }