drivers/scsi/lpfc/lpfc_nvmet.c

   1 /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Fibre Channel Host Bus Adapters.                                *
   4  * Copyright (C) 2017-2022 Broadcom. All Rights Reserved. The term *
   5  * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.     *
   6  * Copyright (C) 2004-2016 Emulex.  All rights reserved.           *
   7  * EMULEX and SLI are trademarks of Emulex.                        *
   8  * www.broadcom.com                                                *
   9  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
  10  *                                                                 *
  11  * This program is free software; you can redistribute it and/or   *
  12  * modify it under the terms of version 2 of the GNU General       *
  13  * Public License as published by the Free Software Foundation.    *
  14  * This program is distributed in the hope that it will be useful. *
  15  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  16  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  17  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  18  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  19  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  20  * more details, a copy of which can be found in the file COPYING  *
  21  * included with this package.                                     *
  22  ********************************************************************/
  23 #include <linux/pci.h>
  24 #include <linux/slab.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/delay.h>
  27 #include <asm/unaligned.h>
  28 #include <linux/crc-t10dif.h>
  29 #include <net/checksum.h>
  30
  31 #include <scsi/scsi.h>
  32 #include <scsi/scsi_device.h>
  33 #include <scsi/scsi_eh.h>
  34 #include <scsi/scsi_host.h>
  35 #include <scsi/scsi_tcq.h>
  36 #include <scsi/scsi_transport_fc.h>
  37 #include <scsi/fc/fc_fs.h>
  38
  39 #include "lpfc_version.h"
  40 #include "lpfc_hw4.h"
  41 #include "lpfc_hw.h"
  42 #include "lpfc_sli.h"
  43 #include "lpfc_sli4.h"
  44 #include "lpfc_nl.h"
  45 #include "lpfc_disc.h"
  46 #include "lpfc.h"
  47 #include "lpfc_scsi.h"
  48 #include "lpfc_nvme.h"
  49 #include "lpfc_logmsg.h"
  50 #include "lpfc_crtn.h"
  51 #include "lpfc_vport.h"
  52 #include "lpfc_debugfs.h"
  53
  54 static struct lpfc_iocbq *lpfc_nvmet_prep_ls_wqe(struct lpfc_hba *,
  55                                                  struct lpfc_async_xchg_ctx *,
  56                                                  dma_addr_t rspbuf,
  57                                                  uint16_t rspsize);
  58 static struct lpfc_iocbq *lpfc_nvmet_prep_fcp_wqe(struct lpfc_hba *,
  59                                                   struct lpfc_async_xchg_ctx *);
  60 static int lpfc_nvmet_sol_fcp_issue_abort(struct lpfc_hba *,
  61                                           struct lpfc_async_xchg_ctx *,
  62                                           uint32_t, uint16_t);
  63 static int lpfc_nvmet_unsol_fcp_issue_abort(struct lpfc_hba *,
  64                                             struct lpfc_async_xchg_ctx *,
  65                                             uint32_t, uint16_t);
  66 static void lpfc_nvmet_wqfull_flush(struct lpfc_hba *, struct lpfc_queue *,
  67                                     struct lpfc_async_xchg_ctx *);
  68 static void lpfc_nvmet_fcp_rqst_defer_work(struct work_struct *);
  69
  70 static void lpfc_nvmet_process_rcv_fcp_req(struct lpfc_nvmet_ctxbuf *ctx_buf);
  71
  72 static union lpfc_wqe128 lpfc_tsend_cmd_template;
  73 static union lpfc_wqe128 lpfc_treceive_cmd_template;
  74 static union lpfc_wqe128 lpfc_trsp_cmd_template;
  75
  76 /* Setup WQE templates for NVME IOs */
  77 void
  78 lpfc_nvmet_cmd_template(void)
  79 {
  80         union lpfc_wqe128 *wqe;
  81
  82         /* TSEND template */
  83         wqe = &lpfc_tsend_cmd_template;
  84         memset(wqe, 0, sizeof(union lpfc_wqe128));
  85
  86         /* Word 0, 1, 2 - BDE is variable */
  87
  88         /* Word 3 - payload_offset_len is zero */
  89
  90         /* Word 4 - relative_offset is variable */
  91
  92         /* Word 5 - is zero */
  93
  94         /* Word 6 - ctxt_tag, xri_tag is variable */
  95
  96         /* Word 7 - wqe_ar is variable */
  97         bf_set(wqe_cmnd, &wqe->fcp_tsend.wqe_com, CMD_FCP_TSEND64_WQE);
  98         bf_set(wqe_pu, &wqe->fcp_tsend.wqe_com, PARM_REL_OFF);
  99         bf_set(wqe_class, &wqe->fcp_tsend.wqe_com, CLASS3);
 100         bf_set(wqe_ct, &wqe->fcp_tsend.wqe_com, SLI4_CT_RPI);
 101         bf_set(wqe_ar, &wqe->fcp_tsend.wqe_com, 1);
 102
 103         /* Word 8 - abort_tag is variable */
 104
 105         /* Word 9  - reqtag, rcvoxid is variable */
 106
 107         /* Word 10 - wqes, xc is variable */
 108         bf_set(wqe_xchg, &wqe->fcp_tsend.wqe_com, LPFC_NVME_XCHG);
 109         bf_set(wqe_dbde, &wqe->fcp_tsend.wqe_com, 1);
 110         bf_set(wqe_wqes, &wqe->fcp_tsend.wqe_com, 0);
 111         bf_set(wqe_xc, &wqe->fcp_tsend.wqe_com, 1);
 112         bf_set(wqe_iod, &wqe->fcp_tsend.wqe_com, LPFC_WQE_IOD_WRITE);
 113         bf_set(wqe_lenloc, &wqe->fcp_tsend.wqe_com, LPFC_WQE_LENLOC_WORD12);
 114
 115         /* Word 11 - sup, irsp, irsplen is variable */
 116         bf_set(wqe_cmd_type, &wqe->fcp_tsend.wqe_com, FCP_COMMAND_TSEND);
 117         bf_set(wqe_cqid, &wqe->fcp_tsend.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
 118         bf_set(wqe_sup, &wqe->fcp_tsend.wqe_com, 0);
 119         bf_set(wqe_irsp, &wqe->fcp_tsend.wqe_com, 0);
 120         bf_set(wqe_irsplen, &wqe->fcp_tsend.wqe_com, 0);
 121         bf_set(wqe_pbde, &wqe->fcp_tsend.wqe_com, 0);
 122
 123         /* Word 12 - fcp_data_len is variable */
 124
 125         /* Word 13, 14, 15 - PBDE is zero */
 126
 127         /* TRECEIVE template */
 128         wqe = &lpfc_treceive_cmd_template;
 129         memset(wqe, 0, sizeof(union lpfc_wqe128));
 130
 131         /* Word 0, 1, 2 - BDE is variable */
 132
 133         /* Word 3 */
 134         wqe->fcp_treceive.payload_offset_len = TXRDY_PAYLOAD_LEN;
 135
 136         /* Word 4 - relative_offset is variable */
 137
 138         /* Word 5 - is zero */
 139
 140         /* Word 6 - ctxt_tag, xri_tag is variable */
 141
 142         /* Word 7 */
 143         bf_set(wqe_cmnd, &wqe->fcp_treceive.wqe_com, CMD_FCP_TRECEIVE64_WQE);
 144         bf_set(wqe_pu, &wqe->fcp_treceive.wqe_com, PARM_REL_OFF);
 145         bf_set(wqe_class, &wqe->fcp_treceive.wqe_com, CLASS3);
 146         bf_set(wqe_ct, &wqe->fcp_treceive.wqe_com, SLI4_CT_RPI);
 147         bf_set(wqe_ar, &wqe->fcp_treceive.wqe_com, 0);
 148
 149         /* Word 8 - abort_tag is variable */
 150
 151         /* Word 9  - reqtag, rcvoxid is variable */
 152
 153         /* Word 10 - xc is variable */
 154         bf_set(wqe_dbde, &wqe->fcp_treceive.wqe_com, 1);
 155         bf_set(wqe_wqes, &wqe->fcp_treceive.wqe_com, 0);
 156         bf_set(wqe_xchg, &wqe->fcp_treceive.wqe_com, LPFC_NVME_XCHG);
 157         bf_set(wqe_iod, &wqe->fcp_treceive.wqe_com, LPFC_WQE_IOD_READ);
 158         bf_set(wqe_lenloc, &wqe->fcp_treceive.wqe_com, LPFC_WQE_LENLOC_WORD12);
 159         bf_set(wqe_xc, &wqe->fcp_tsend.wqe_com, 1);
 160
 161         /* Word 11 - pbde is variable */
 162         bf_set(wqe_cmd_type, &wqe->fcp_treceive.wqe_com, FCP_COMMAND_TRECEIVE);
 163         bf_set(wqe_cqid, &wqe->fcp_treceive.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
 164         bf_set(wqe_sup, &wqe->fcp_treceive.wqe_com, 0);
 165         bf_set(wqe_irsp, &wqe->fcp_treceive.wqe_com, 0);
 166         bf_set(wqe_irsplen, &wqe->fcp_treceive.wqe_com, 0);
 167         bf_set(wqe_pbde, &wqe->fcp_treceive.wqe_com, 1);
 168
 169         /* Word 12 - fcp_data_len is variable */
 170
 171         /* Word 13, 14, 15 - PBDE is variable */
 172
 173         /* TRSP template */
 174         wqe = &lpfc_trsp_cmd_template;
 175         memset(wqe, 0, sizeof(union lpfc_wqe128));
 176
 177         /* Word 0, 1, 2 - BDE is variable */
 178
 179         /* Word 3 - response_len is variable */
 180
 181         /* Word 4, 5 - is zero */
 182
 183         /* Word 6 - ctxt_tag, xri_tag is variable */
 184
 185         /* Word 7 */
 186         bf_set(wqe_cmnd, &wqe->fcp_trsp.wqe_com, CMD_FCP_TRSP64_WQE);
 187         bf_set(wqe_pu, &wqe->fcp_trsp.wqe_com, PARM_UNUSED);
 188         bf_set(wqe_class, &wqe->fcp_trsp.wqe_com, CLASS3);
 189         bf_set(wqe_ct, &wqe->fcp_trsp.wqe_com, SLI4_CT_RPI);
 190         bf_set(wqe_ag, &wqe->fcp_trsp.wqe_com, 1); /* wqe_ar */
 191
 192         /* Word 8 - abort_tag is variable */
 193
 194         /* Word 9  - reqtag is variable */
 195
 196         /* Word 10 wqes, xc is variable */
 197         bf_set(wqe_dbde, &wqe->fcp_trsp.wqe_com, 1);
 198         bf_set(wqe_xchg, &wqe->fcp_trsp.wqe_com, LPFC_NVME_XCHG);
 199         bf_set(wqe_wqes, &wqe->fcp_trsp.wqe_com, 0);
 200         bf_set(wqe_xc, &wqe->fcp_trsp.wqe_com, 0);
 201         bf_set(wqe_iod, &wqe->fcp_trsp.wqe_com, LPFC_WQE_IOD_NONE);
 202         bf_set(wqe_lenloc, &wqe->fcp_trsp.wqe_com, LPFC_WQE_LENLOC_WORD3);
 203
 204         /* Word 11 irsp, irsplen is variable */
 205         bf_set(wqe_cmd_type, &wqe->fcp_trsp.wqe_com, FCP_COMMAND_TRSP);
 206         bf_set(wqe_cqid, &wqe->fcp_trsp.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
 207         bf_set(wqe_sup, &wqe->fcp_trsp.wqe_com, 0);
 208         bf_set(wqe_irsp, &wqe->fcp_trsp.wqe_com, 0);
 209         bf_set(wqe_irsplen, &wqe->fcp_trsp.wqe_com, 0);
 210         bf_set(wqe_pbde, &wqe->fcp_trsp.wqe_com, 0);
 211
 212         /* Word 12, 13, 14, 15 - is zero */
 213 }
 214
 215 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
 216 static struct lpfc_async_xchg_ctx *
 217 lpfc_nvmet_get_ctx_for_xri(struct lpfc_hba *phba, u16 xri)
 218 {
 219         struct lpfc_async_xchg_ctx *ctxp;
 220         unsigned long iflag;
 221         bool found = false;
 222
 223         spin_lock_irqsave(&phba->sli4_hba.t_active_list_lock, iflag);
 224         list_for_each_entry(ctxp, &phba->sli4_hba.t_active_ctx_list, list) {
 225                 if (ctxp->ctxbuf->sglq->sli4_xritag != xri)
 226                         continue;
 227
 228                 found = true;
 229                 break;
 230         }
 231         spin_unlock_irqrestore(&phba->sli4_hba.t_active_list_lock, iflag);
 232         if (found)
 233                 return ctxp;
 234
 235         return NULL;
 236 }
 237
 238 static struct lpfc_async_xchg_ctx *
 239 lpfc_nvmet_get_ctx_for_oxid(struct lpfc_hba *phba, u16 oxid, u32 sid)
 240 {
 241         struct lpfc_async_xchg_ctx *ctxp;
 242         unsigned long iflag;
 243         bool found = false;
 244
 245         spin_lock_irqsave(&phba->sli4_hba.t_active_list_lock, iflag);
 246         list_for_each_entry(ctxp, &phba->sli4_hba.t_active_ctx_list, list) {
 247                 if (ctxp->oxid != oxid || ctxp->sid != sid)
 248                         continue;
 249
 250                 found = true;
 251                 break;
 252         }
 253         spin_unlock_irqrestore(&phba->sli4_hba.t_active_list_lock, iflag);
 254         if (found)
 255                 return ctxp;
 256
 257         return NULL;
 258 }
 259 #endif
 260
 261 static void
 262 lpfc_nvmet_defer_release(struct lpfc_hba *phba,
 263                         struct lpfc_async_xchg_ctx *ctxp)
 264 {
 265         lockdep_assert_held(&ctxp->ctxlock);
 266
 267         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
 268                         "6313 NVMET Defer ctx release oxid x%x flg x%x\n",
 269                         ctxp->oxid, ctxp->flag);
 270
 271         if (ctxp->flag & LPFC_NVME_CTX_RLS)
 272                 return;
 273
 274         ctxp->flag |= LPFC_NVME_CTX_RLS;
 275         spin_lock(&phba->sli4_hba.t_active_list_lock);
 276         list_del(&ctxp->list);
 277         spin_unlock(&phba->sli4_hba.t_active_list_lock);
 278         spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
 279         list_add_tail(&ctxp->list, &phba->sli4_hba.lpfc_abts_nvmet_ctx_list);
 280         spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
 281 }
 282
 283 /**
 284  * __lpfc_nvme_xmt_ls_rsp_cmp - Generic completion handler for the
 285  *         transmission of an NVME LS response.
 286  * @phba: Pointer to HBA context object.
 287  * @cmdwqe: Pointer to driver command WQE object.
 288  * @rspwqe: Pointer to driver response WQE object.
 289  *
 290  * The function is called from SLI ring event handler with no
 291  * lock held. The function frees memory resources used for the command
 292  * used to send the NVME LS RSP.
 293  **/
 294 void
 295 __lpfc_nvme_xmt_ls_rsp_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
 296                            struct lpfc_iocbq *rspwqe)
 297 {
 298         struct lpfc_async_xchg_ctx *axchg = cmdwqe->context_un.axchg;
 299         struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
 300         struct nvmefc_ls_rsp *ls_rsp = &axchg->ls_rsp;
 301         uint32_t status, result;
 302
 303         status = bf_get(lpfc_wcqe_c_status, wcqe) & LPFC_IOCB_STATUS_MASK;
 304         result = wcqe->parameter;
 305
 306         if (axchg->state != LPFC_NVME_STE_LS_RSP || axchg->entry_cnt != 2) {
 307                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 308                                 "6410 NVMEx LS cmpl state mismatch IO x%x: "
 309                                 "%d %d\n",
 310                                 axchg->oxid, axchg->state, axchg->entry_cnt);
 311         }
 312
 313         lpfc_nvmeio_data(phba, "NVMEx LS  CMPL: xri x%x stat x%x result x%x\n",
 314                          axchg->oxid, status, result);
 315
 316         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
 317                         "6038 NVMEx LS rsp cmpl: %d %d oxid x%x\n",
 318                         status, result, axchg->oxid);
 319
 320         lpfc_nlp_put(cmdwqe->ndlp);
 321         cmdwqe->context_un.axchg = NULL;
 322         cmdwqe->bpl_dmabuf = NULL;
 323         lpfc_sli_release_iocbq(phba, cmdwqe);
 324         ls_rsp->done(ls_rsp);
 325         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
 326                         "6200 NVMEx LS rsp cmpl done status %d oxid x%x\n",
 327                         status, axchg->oxid);
 328         kfree(axchg);
 329 }
 330
 331 /**
 332  * lpfc_nvmet_xmt_ls_rsp_cmp - Completion handler for LS Response
 333  * @phba: Pointer to HBA context object.
 334  * @cmdwqe: Pointer to driver command WQE object.
 335  * @rspwqe: Pointer to driver response WQE object.
 336  *
 337  * The function is called from SLI ring event handler with no
 338  * lock held. This function is the completion handler for NVME LS commands
 339  * The function updates any states and statistics, then calls the
 340  * generic completion handler to free resources.
 341  **/
 342 static void
 343 lpfc_nvmet_xmt_ls_rsp_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
 344                           struct lpfc_iocbq *rspwqe)
 345 {
 346         struct lpfc_nvmet_tgtport *tgtp;
 347         uint32_t status, result;
 348         struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
 349
 350         if (!phba->targetport)
 351                 goto finish;
 352
 353         status = bf_get(lpfc_wcqe_c_status, wcqe) & LPFC_IOCB_STATUS_MASK;
 354         result = wcqe->parameter;
 355
 356         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
 357         if (tgtp) {
 358                 if (status) {
 359                         atomic_inc(&tgtp->xmt_ls_rsp_error);
 360                         if (result == IOERR_ABORT_REQUESTED)
 361                                 atomic_inc(&tgtp->xmt_ls_rsp_aborted);
 362                         if (bf_get(lpfc_wcqe_c_xb, wcqe))
 363                                 atomic_inc(&tgtp->xmt_ls_rsp_xb_set);
 364                 } else {
 365                         atomic_inc(&tgtp->xmt_ls_rsp_cmpl);
 366                 }
 367         }
 368
 369 finish:
 370         __lpfc_nvme_xmt_ls_rsp_cmp(phba, cmdwqe, rspwqe);
 371 }
 372
 373 /**
 374  * lpfc_nvmet_ctxbuf_post - Repost a NVMET RQ DMA buffer and clean up context
 375  * @phba: HBA buffer is associated with
 376  * @ctx_buf: ctx buffer context
 377  *
 378  * Description: Frees the given DMA buffer in the appropriate way given by
 379  * reposting it to its associated RQ so it can be reused.
 380  *
 381  * Notes: Takes phba->hbalock.  Can be called with or without other locks held.
 382  *
 383  * Returns: None
 384  **/
 385 void
 386 lpfc_nvmet_ctxbuf_post(struct lpfc_hba *phba, struct lpfc_nvmet_ctxbuf *ctx_buf)
 387 {
 388 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
 389         struct lpfc_async_xchg_ctx *ctxp = ctx_buf->context;
 390         struct lpfc_nvmet_tgtport *tgtp;
 391         struct fc_frame_header *fc_hdr;
 392         struct rqb_dmabuf *nvmebuf;
 393         struct lpfc_nvmet_ctx_info *infop;
 394         uint32_t size, oxid, sid;
 395         int cpu;
 396         unsigned long iflag;
 397
 398         if (ctxp->state == LPFC_NVME_STE_FREE) {
 399                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 400                                 "6411 NVMET free, already free IO x%x: %d %d\n",
 401                                 ctxp->oxid, ctxp->state, ctxp->entry_cnt);
 402         }
 403
 404         if (ctxp->rqb_buffer) {
 405                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
 406                 nvmebuf = ctxp->rqb_buffer;
 407                 /* check if freed in another path whilst acquiring lock */
 408                 if (nvmebuf) {
 409                         ctxp->rqb_buffer = NULL;
 410                         if (ctxp->flag & LPFC_NVME_CTX_REUSE_WQ) {
 411                                 ctxp->flag &= ~LPFC_NVME_CTX_REUSE_WQ;
 412                                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
 413                                 nvmebuf->hrq->rqbp->rqb_free_buffer(phba,
 414                                                                     nvmebuf);
 415                         } else {
 416                                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
 417                                 /* repost */
 418                                 lpfc_rq_buf_free(phba, &nvmebuf->hbuf);
 419                         }
 420                 } else {
 421                         spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
 422                 }
 423         }
 424         ctxp->state = LPFC_NVME_STE_FREE;
 425
 426         spin_lock_irqsave(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
 427         if (phba->sli4_hba.nvmet_io_wait_cnt) {
 428                 list_remove_head(&phba->sli4_hba.lpfc_nvmet_io_wait_list,
 429                                  nvmebuf, struct rqb_dmabuf,
 430                                  hbuf.list);
 431                 phba->sli4_hba.nvmet_io_wait_cnt--;
 432                 spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock,
 433                                        iflag);
 434
 435                 fc_hdr = (struct fc_frame_header *)(nvmebuf->hbuf.virt);
 436                 oxid = be16_to_cpu(fc_hdr->fh_ox_id);
 437                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
 438                 size = nvmebuf->bytes_recv;
 439                 sid = sli4_sid_from_fc_hdr(fc_hdr);
 440
 441                 ctxp = (struct lpfc_async_xchg_ctx *)ctx_buf->context;
 442                 ctxp->wqeq = NULL;
 443                 ctxp->offset = 0;
 444                 ctxp->phba = phba;
 445                 ctxp->size = size;
 446                 ctxp->oxid = oxid;
 447                 ctxp->sid = sid;
 448                 ctxp->state = LPFC_NVME_STE_RCV;
 449                 ctxp->entry_cnt = 1;
 450                 ctxp->flag = 0;
 451                 ctxp->ctxbuf = ctx_buf;
 452                 ctxp->rqb_buffer = (void *)nvmebuf;
 453                 spin_lock_init(&ctxp->ctxlock);
 454
 455 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 456                 /* NOTE: isr time stamp is stale when context is re-assigned*/
 457                 if (ctxp->ts_isr_cmd) {
 458                         ctxp->ts_cmd_nvme = 0;
 459                         ctxp->ts_nvme_data = 0;
 460                         ctxp->ts_data_wqput = 0;
 461                         ctxp->ts_isr_data = 0;
 462                         ctxp->ts_data_nvme = 0;
 463                         ctxp->ts_nvme_status = 0;
 464                         ctxp->ts_status_wqput = 0;
 465                         ctxp->ts_isr_status = 0;
 466                         ctxp->ts_status_nvme = 0;
 467                 }
 468 #endif
 469                 atomic_inc(&tgtp->rcv_fcp_cmd_in);
 470
 471                 /* Indicate that a replacement buffer has been posted */
 472                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
 473                 ctxp->flag |= LPFC_NVME_CTX_REUSE_WQ;
 474                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
 475
 476                 if (!queue_work(phba->wq, &ctx_buf->defer_work)) {
 477                         atomic_inc(&tgtp->rcv_fcp_cmd_drop);
 478                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 479                                         "6181 Unable to queue deferred work "
 480                                         "for oxid x%x. "
 481                                         "FCP Drop IO [x%x x%x x%x]\n",
 482                                         ctxp->oxid,
 483                                         atomic_read(&tgtp->rcv_fcp_cmd_in),
 484                                         atomic_read(&tgtp->rcv_fcp_cmd_out),
 485                                         atomic_read(&tgtp->xmt_fcp_release));
 486
 487                         spin_lock_irqsave(&ctxp->ctxlock, iflag);
 488                         lpfc_nvmet_defer_release(phba, ctxp);
 489                         spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
 490                         lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, sid, oxid);
 491                 }
 492                 return;
 493         }
 494         spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
 495
 496         /*
 497          * Use the CPU context list, from the MRQ the IO was received on
 498          * (ctxp->idx), to save context structure.
 499          */
 500         spin_lock_irqsave(&phba->sli4_hba.t_active_list_lock, iflag);
 501         list_del_init(&ctxp->list);
 502         spin_unlock_irqrestore(&phba->sli4_hba.t_active_list_lock, iflag);
 503         cpu = raw_smp_processor_id();
 504         infop = lpfc_get_ctx_list(phba, cpu, ctxp->idx);
 505         spin_lock_irqsave(&infop->nvmet_ctx_list_lock, iflag);
 506         list_add_tail(&ctx_buf->list, &infop->nvmet_ctx_list);
 507         infop->nvmet_ctx_list_cnt++;
 508         spin_unlock_irqrestore(&infop->nvmet_ctx_list_lock, iflag);
 509 #endif
 510 }
 511
 512 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 513 static void
 514 lpfc_nvmet_ktime(struct lpfc_hba *phba,
 515                  struct lpfc_async_xchg_ctx *ctxp)
 516 {
 517         uint64_t seg1, seg2, seg3, seg4, seg5;
 518         uint64_t seg6, seg7, seg8, seg9, seg10;
 519         uint64_t segsum;
 520
 521         if (!ctxp->ts_isr_cmd || !ctxp->ts_cmd_nvme ||
 522             !ctxp->ts_nvme_data || !ctxp->ts_data_wqput ||
 523             !ctxp->ts_isr_data || !ctxp->ts_data_nvme ||
 524             !ctxp->ts_nvme_status || !ctxp->ts_status_wqput ||
 525             !ctxp->ts_isr_status || !ctxp->ts_status_nvme)
 526                 return;
 527
 528         if (ctxp->ts_status_nvme < ctxp->ts_isr_cmd)
 529                 return;
 530         if (ctxp->ts_isr_cmd  > ctxp->ts_cmd_nvme)
 531                 return;
 532         if (ctxp->ts_cmd_nvme > ctxp->ts_nvme_data)
 533                 return;
 534         if (ctxp->ts_nvme_data > ctxp->ts_data_wqput)
 535                 return;
 536         if (ctxp->ts_data_wqput > ctxp->ts_isr_data)
 537                 return;
 538         if (ctxp->ts_isr_data > ctxp->ts_data_nvme)
 539                 return;
 540         if (ctxp->ts_data_nvme > ctxp->ts_nvme_status)
 541                 return;
 542         if (ctxp->ts_nvme_status > ctxp->ts_status_wqput)
 543                 return;
 544         if (ctxp->ts_status_wqput > ctxp->ts_isr_status)
 545                 return;
 546         if (ctxp->ts_isr_status > ctxp->ts_status_nvme)
 547                 return;
 548         /*
 549          * Segment 1 - Time from FCP command received by MSI-X ISR
 550          * to FCP command is passed to NVME Layer.
 551          * Segment 2 - Time from FCP command payload handed
 552          * off to NVME Layer to Driver receives a Command op
 553          * from NVME Layer.
 554          * Segment 3 - Time from Driver receives a Command op
 555          * from NVME Layer to Command is put on WQ.
 556          * Segment 4 - Time from Driver WQ put is done
 557          * to MSI-X ISR for Command cmpl.
 558          * Segment 5 - Time from MSI-X ISR for Command cmpl to
 559          * Command cmpl is passed to NVME Layer.
 560          * Segment 6 - Time from Command cmpl is passed to NVME
 561          * Layer to Driver receives a RSP op from NVME Layer.
 562          * Segment 7 - Time from Driver receives a RSP op from
 563          * NVME Layer to WQ put is done on TRSP FCP Status.
 564          * Segment 8 - Time from Driver WQ put is done on TRSP
 565          * FCP Status to MSI-X ISR for TRSP cmpl.
 566          * Segment 9 - Time from MSI-X ISR for TRSP cmpl to
 567          * TRSP cmpl is passed to NVME Layer.
 568          * Segment 10 - Time from FCP command received by
 569          * MSI-X ISR to command is completed on wire.
 570          * (Segments 1 thru 8) for READDATA / WRITEDATA
 571          * (Segments 1 thru 4) for READDATA_RSP
 572          */
 573         seg1 = ctxp->ts_cmd_nvme - ctxp->ts_isr_cmd;
 574         segsum = seg1;
 575
 576         seg2 = ctxp->ts_nvme_data - ctxp->ts_isr_cmd;
 577         if (segsum > seg2)
 578                 return;
 579         seg2 -= segsum;
 580         segsum += seg2;
 581
 582         seg3 = ctxp->ts_data_wqput - ctxp->ts_isr_cmd;
 583         if (segsum > seg3)
 584                 return;
 585         seg3 -= segsum;
 586         segsum += seg3;
 587
 588         seg4 = ctxp->ts_isr_data - ctxp->ts_isr_cmd;
 589         if (segsum > seg4)
 590                 return;
 591         seg4 -= segsum;
 592         segsum += seg4;
 593
 594         seg5 = ctxp->ts_data_nvme - ctxp->ts_isr_cmd;
 595         if (segsum > seg5)
 596                 return;
 597         seg5 -= segsum;
 598         segsum += seg5;
 599
 600
 601         /* For auto rsp commands seg6 thru seg10 will be 0 */
 602         if (ctxp->ts_nvme_status > ctxp->ts_data_nvme) {
 603                 seg6 = ctxp->ts_nvme_status - ctxp->ts_isr_cmd;
 604                 if (segsum > seg6)
 605                         return;
 606                 seg6 -= segsum;
 607                 segsum += seg6;
 608
 609                 seg7 = ctxp->ts_status_wqput - ctxp->ts_isr_cmd;
 610                 if (segsum > seg7)
 611                         return;
 612                 seg7 -= segsum;
 613                 segsum += seg7;
 614
 615                 seg8 = ctxp->ts_isr_status - ctxp->ts_isr_cmd;
 616                 if (segsum > seg8)
 617                         return;
 618                 seg8 -= segsum;
 619                 segsum += seg8;
 620
 621                 seg9 = ctxp->ts_status_nvme - ctxp->ts_isr_cmd;
 622                 if (segsum > seg9)
 623                         return;
 624                 seg9 -= segsum;
 625                 segsum += seg9;
 626
 627                 if (ctxp->ts_isr_status < ctxp->ts_isr_cmd)
 628                         return;
 629                 seg10 = (ctxp->ts_isr_status -
 630                         ctxp->ts_isr_cmd);
 631         } else {
 632                 if (ctxp->ts_isr_data < ctxp->ts_isr_cmd)
 633                         return;
 634                 seg6 =  0;
 635                 seg7 =  0;
 636                 seg8 =  0;
 637                 seg9 =  0;
 638                 seg10 = (ctxp->ts_isr_data - ctxp->ts_isr_cmd);
 639         }
 640
 641         phba->ktime_seg1_total += seg1;
 642         if (seg1 < phba->ktime_seg1_min)
 643                 phba->ktime_seg1_min = seg1;
 644         else if (seg1 > phba->ktime_seg1_max)
 645                 phba->ktime_seg1_max = seg1;
 646
 647         phba->ktime_seg2_total += seg2;
 648         if (seg2 < phba->ktime_seg2_min)
 649                 phba->ktime_seg2_min = seg2;
 650         else if (seg2 > phba->ktime_seg2_max)
 651                 phba->ktime_seg2_max = seg2;
 652
 653         phba->ktime_seg3_total += seg3;
 654         if (seg3 < phba->ktime_seg3_min)
 655                 phba->ktime_seg3_min = seg3;
 656         else if (seg3 > phba->ktime_seg3_max)
 657                 phba->ktime_seg3_max = seg3;
 658
 659         phba->ktime_seg4_total += seg4;
 660         if (seg4 < phba->ktime_seg4_min)
 661                 phba->ktime_seg4_min = seg4;
 662         else if (seg4 > phba->ktime_seg4_max)
 663                 phba->ktime_seg4_max = seg4;
 664
 665         phba->ktime_seg5_total += seg5;
 666         if (seg5 < phba->ktime_seg5_min)
 667                 phba->ktime_seg5_min = seg5;
 668         else if (seg5 > phba->ktime_seg5_max)
 669                 phba->ktime_seg5_max = seg5;
 670
 671         phba->ktime_data_samples++;
 672         if (!seg6)
 673                 goto out;
 674
 675         phba->ktime_seg6_total += seg6;
 676         if (seg6 < phba->ktime_seg6_min)
 677                 phba->ktime_seg6_min = seg6;
 678         else if (seg6 > phba->ktime_seg6_max)
 679                 phba->ktime_seg6_max = seg6;
 680
 681         phba->ktime_seg7_total += seg7;
 682         if (seg7 < phba->ktime_seg7_min)
 683                 phba->ktime_seg7_min = seg7;
 684         else if (seg7 > phba->ktime_seg7_max)
 685                 phba->ktime_seg7_max = seg7;
 686
 687         phba->ktime_seg8_total += seg8;
 688         if (seg8 < phba->ktime_seg8_min)
 689                 phba->ktime_seg8_min = seg8;
 690         else if (seg8 > phba->ktime_seg8_max)
 691                 phba->ktime_seg8_max = seg8;
 692
 693         phba->ktime_seg9_total += seg9;
 694         if (seg9 < phba->ktime_seg9_min)
 695                 phba->ktime_seg9_min = seg9;
 696         else if (seg9 > phba->ktime_seg9_max)
 697                 phba->ktime_seg9_max = seg9;
 698 out:
 699         phba->ktime_seg10_total += seg10;
 700         if (seg10 < phba->ktime_seg10_min)
 701                 phba->ktime_seg10_min = seg10;
 702         else if (seg10 > phba->ktime_seg10_max)
 703                 phba->ktime_seg10_max = seg10;
 704         phba->ktime_status_samples++;
 705 }
 706 #endif
 707
 708 /**
 709  * lpfc_nvmet_xmt_fcp_op_cmp - Completion handler for FCP Response
 710  * @phba: Pointer to HBA context object.
 711  * @cmdwqe: Pointer to driver command WQE object.
 712  * @rspwqe: Pointer to driver response WQE object.
 713  *
 714  * The function is called from SLI ring event handler with no
 715  * lock held. This function is the completion handler for NVME FCP commands
 716  * The function frees memory resources used for the NVME commands.
 717  **/
 718 static void
 719 lpfc_nvmet_xmt_fcp_op_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
 720                           struct lpfc_iocbq *rspwqe)
 721 {
 722         struct lpfc_nvmet_tgtport *tgtp;
 723         struct nvmefc_tgt_fcp_req *rsp;
 724         struct lpfc_async_xchg_ctx *ctxp;
 725         uint32_t status, result, op, start_clean, logerr;
 726         struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
 727 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 728         int id;
 729 #endif
 730
 731         ctxp = cmdwqe->context_un.axchg;
 732         ctxp->flag &= ~LPFC_NVME_IO_INP;
 733
 734         rsp = &ctxp->hdlrctx.fcp_req;
 735         op = rsp->op;
 736
 737         status = bf_get(lpfc_wcqe_c_status, wcqe);
 738         result = wcqe->parameter;
 739
 740         if (phba->targetport)
 741                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
 742         else
 743                 tgtp = NULL;
 744
 745         lpfc_nvmeio_data(phba, "NVMET FCP CMPL: xri x%x op x%x status x%x\n",
 746                          ctxp->oxid, op, status);
 747
 748         if (status) {
 749                 rsp->fcp_error = NVME_SC_DATA_XFER_ERROR;
 750                 rsp->transferred_length = 0;
 751                 if (tgtp) {
 752                         atomic_inc(&tgtp->xmt_fcp_rsp_error);
 753                         if (result == IOERR_ABORT_REQUESTED)
 754                                 atomic_inc(&tgtp->xmt_fcp_rsp_aborted);
 755                 }
 756
 757                 logerr = LOG_NVME_IOERR;
 758
 759                 /* pick up SLI4 exhange busy condition */
 760                 if (bf_get(lpfc_wcqe_c_xb, wcqe)) {
 761                         ctxp->flag |= LPFC_NVME_XBUSY;
 762                         logerr |= LOG_NVME_ABTS;
 763                         if (tgtp)
 764                                 atomic_inc(&tgtp->xmt_fcp_rsp_xb_set);
 765
 766                 } else {
 767                         ctxp->flag &= ~LPFC_NVME_XBUSY;
 768                 }
 769
 770                 lpfc_printf_log(phba, KERN_INFO, logerr,
 771                                 "6315 IO Error Cmpl oxid: x%x xri: x%x %x/%x "
 772                                 "XBUSY:x%x\n",
 773                                 ctxp->oxid, ctxp->ctxbuf->sglq->sli4_xritag,
 774                                 status, result, ctxp->flag);
 775
 776         } else {
 777                 rsp->fcp_error = NVME_SC_SUCCESS;
 778                 if (op == NVMET_FCOP_RSP)
 779                         rsp->transferred_length = rsp->rsplen;
 780                 else
 781                         rsp->transferred_length = rsp->transfer_length;
 782                 if (tgtp)
 783                         atomic_inc(&tgtp->xmt_fcp_rsp_cmpl);
 784         }
 785
 786         if ((op == NVMET_FCOP_READDATA_RSP) ||
 787             (op == NVMET_FCOP_RSP)) {
 788                 /* Sanity check */
 789                 ctxp->state = LPFC_NVME_STE_DONE;
 790                 ctxp->entry_cnt++;
 791
 792 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 793                 if (ctxp->ts_cmd_nvme) {
 794                         if (rsp->op == NVMET_FCOP_READDATA_RSP) {
 795                                 ctxp->ts_isr_data =
 796                                         cmdwqe->isr_timestamp;
 797                                 ctxp->ts_data_nvme =
 798                                         ktime_get_ns();
 799                                 ctxp->ts_nvme_status =
 800                                         ctxp->ts_data_nvme;
 801                                 ctxp->ts_status_wqput =
 802                                         ctxp->ts_data_nvme;
 803                                 ctxp->ts_isr_status =
 804                                         ctxp->ts_data_nvme;
 805                                 ctxp->ts_status_nvme =
 806                                         ctxp->ts_data_nvme;
 807                         } else {
 808                                 ctxp->ts_isr_status =
 809                                         cmdwqe->isr_timestamp;
 810                                 ctxp->ts_status_nvme =
 811                                         ktime_get_ns();
 812                         }
 813                 }
 814 #endif
 815                 rsp->done(rsp);
 816 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 817                 if (ctxp->ts_cmd_nvme)
 818                         lpfc_nvmet_ktime(phba, ctxp);
 819 #endif
 820                 /* lpfc_nvmet_xmt_fcp_release() will recycle the context */
 821         } else {
 822                 ctxp->entry_cnt++;
 823                 start_clean = offsetof(struct lpfc_iocbq, cmd_flag);
 824                 memset(((char *)cmdwqe) + start_clean, 0,
 825                        (sizeof(struct lpfc_iocbq) - start_clean));
 826 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 827                 if (ctxp->ts_cmd_nvme) {
 828                         ctxp->ts_isr_data = cmdwqe->isr_timestamp;
 829                         ctxp->ts_data_nvme = ktime_get_ns();
 830                 }
 831 #endif
 832                 rsp->done(rsp);
 833         }
 834 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 835         if (phba->hdwqstat_on & LPFC_CHECK_NVMET_IO) {
 836                 id = raw_smp_processor_id();
 837                 this_cpu_inc(phba->sli4_hba.c_stat->cmpl_io);
 838                 if (ctxp->cpu != id)
 839                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
 840                                         "6704 CPU Check cmdcmpl: "
 841                                         "cpu %d expect %d\n",
 842                                         id, ctxp->cpu);
 843         }
 844 #endif
 845 }
 846
 847 /**
 848  * __lpfc_nvme_xmt_ls_rsp - Generic service routine to issue transmit
 849  *         an NVME LS rsp for a prior NVME LS request that was received.
 850  * @axchg: pointer to exchange context for the NVME LS request the response
 851  *         is for.
 852  * @ls_rsp: pointer to the transport LS RSP that is to be sent
 853  * @xmt_ls_rsp_cmp: completion routine to call upon RSP transmit done
 854  *
 855  * This routine is used to format and send a WQE to transmit a NVME LS
 856  * Response.  The response is for a prior NVME LS request that was
 857  * received and posted to the transport.
 858  *
 859  * Returns:
 860  *  0 : if response successfully transmit
 861  *  non-zero : if response failed to transmit, of the form -Exxx.
 862  **/
 863 int
 864 __lpfc_nvme_xmt_ls_rsp(struct lpfc_async_xchg_ctx *axchg,
 865                         struct nvmefc_ls_rsp *ls_rsp,
 866                         void (*xmt_ls_rsp_cmp)(struct lpfc_hba *phba,
 867                                 struct lpfc_iocbq *cmdwqe,
 868                                 struct lpfc_iocbq *rspwqe))
 869 {
 870         struct lpfc_hba *phba = axchg->phba;
 871         struct hbq_dmabuf *nvmebuf = (struct hbq_dmabuf *)axchg->rqb_buffer;
 872         struct lpfc_iocbq *nvmewqeq;
 873         struct lpfc_dmabuf dmabuf;
 874         struct ulp_bde64 bpl;
 875         int rc;
 876
 877         if (phba->pport->load_flag & FC_UNLOADING)
 878                 return -ENODEV;
 879
 880         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
 881                         "6023 NVMEx LS rsp oxid x%x\n", axchg->oxid);
 882
 883         if (axchg->state != LPFC_NVME_STE_LS_RCV || axchg->entry_cnt != 1) {
 884                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 885                                 "6412 NVMEx LS rsp state mismatch "
 886                                 "oxid x%x: %d %d\n",
 887                                 axchg->oxid, axchg->state, axchg->entry_cnt);
 888                 return -EALREADY;
 889         }
 890         axchg->state = LPFC_NVME_STE_LS_RSP;
 891         axchg->entry_cnt++;
 892
 893         nvmewqeq = lpfc_nvmet_prep_ls_wqe(phba, axchg, ls_rsp->rspdma,
 894                                          ls_rsp->rsplen);
 895         if (nvmewqeq == NULL) {
 896                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 897                                 "6150 NVMEx LS Drop Rsp x%x: Prep\n",
 898                                 axchg->oxid);
 899                 rc = -ENOMEM;
 900                 goto out_free_buf;
 901         }
 902
 903         /* Save numBdes for bpl2sgl */
 904         nvmewqeq->num_bdes = 1;
 905         nvmewqeq->hba_wqidx = 0;
 906         nvmewqeq->bpl_dmabuf = &dmabuf;
 907         dmabuf.virt = &bpl;
 908         bpl.addrLow = nvmewqeq->wqe.xmit_sequence.bde.addrLow;
 909         bpl.addrHigh = nvmewqeq->wqe.xmit_sequence.bde.addrHigh;
 910         bpl.tus.f.bdeSize = ls_rsp->rsplen;
 911         bpl.tus.f.bdeFlags = 0;
 912         bpl.tus.w = le32_to_cpu(bpl.tus.w);
 913         /*
 914          * Note: although we're using stack space for the dmabuf, the
 915          * call to lpfc_sli4_issue_wqe is synchronous, so it will not
 916          * be referenced after it returns back to this routine.
 917          */
 918
 919         nvmewqeq->cmd_cmpl = xmt_ls_rsp_cmp;
 920         nvmewqeq->context_un.axchg = axchg;
 921
 922         lpfc_nvmeio_data(phba, "NVMEx LS RSP: xri x%x wqidx x%x len x%x\n",
 923                          axchg->oxid, nvmewqeq->hba_wqidx, ls_rsp->rsplen);
 924
 925         rc = lpfc_sli4_issue_wqe(phba, axchg->hdwq, nvmewqeq);
 926
 927         /* clear to be sure there's no reference */
 928         nvmewqeq->bpl_dmabuf = NULL;
 929
 930         if (rc == WQE_SUCCESS) {
 931                 /*
 932                  * Okay to repost buffer here, but wait till cmpl
 933                  * before freeing ctxp and iocbq.
 934                  */
 935                 lpfc_in_buf_free(phba, &nvmebuf->dbuf);
 936                 return 0;
 937         }
 938
 939         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 940                         "6151 NVMEx LS RSP x%x: failed to transmit %d\n",
 941                         axchg->oxid, rc);
 942
 943         rc = -ENXIO;
 944
 945         lpfc_nlp_put(nvmewqeq->ndlp);
 946
 947 out_free_buf:
 948         /* Give back resources */
 949         lpfc_in_buf_free(phba, &nvmebuf->dbuf);
 950
 951         /*
 952          * As transport doesn't track completions of responses, if the rsp
 953          * fails to send, the transport will effectively ignore the rsp
 954          * and consider the LS done. However, the driver has an active
 955          * exchange open for the LS - so be sure to abort the exchange
 956          * if the response isn't sent.
 957          */
 958         lpfc_nvme_unsol_ls_issue_abort(phba, axchg, axchg->sid, axchg->oxid);
 959         return rc;
 960 }
 961
 962 /**
 963  * lpfc_nvmet_xmt_ls_rsp - Transmit NVME LS response
 964  * @tgtport: pointer to target port that NVME LS is to be transmit from.
 965  * @ls_rsp: pointer to the transport LS RSP that is to be sent
 966  *
 967  * Driver registers this routine to transmit responses for received NVME
 968  * LS requests.
 969  *
 970  * This routine is used to format and send a WQE to transmit a NVME LS
 971  * Response. The ls_rsp is used to reverse-map the LS to the original
 972  * NVME LS request sequence, which provides addressing information for
 973  * the remote port the LS to be sent to, as well as the exchange id
 974  * that is the LS is bound to.
 975  *
 976  * Returns:
 977  *  0 : if response successfully transmit
 978  *  non-zero : if response failed to transmit, of the form -Exxx.
 979  **/
 980 static int
 981 lpfc_nvmet_xmt_ls_rsp(struct nvmet_fc_target_port *tgtport,
 982                       struct nvmefc_ls_rsp *ls_rsp)
 983 {
 984         struct lpfc_async_xchg_ctx *axchg =
 985                 container_of(ls_rsp, struct lpfc_async_xchg_ctx, ls_rsp);
 986         struct lpfc_nvmet_tgtport *nvmep = tgtport->private;
 987         int rc;
 988
 989         if (axchg->phba->pport->load_flag & FC_UNLOADING)
 990                 return -ENODEV;
 991
 992         rc = __lpfc_nvme_xmt_ls_rsp(axchg, ls_rsp, lpfc_nvmet_xmt_ls_rsp_cmp);
 993
 994         if (rc) {
 995                 atomic_inc(&nvmep->xmt_ls_drop);
 996                 /*
 997                  * unless the failure is due to having already sent
 998                  * the response, an abort will be generated for the
 999                  * exchange if the rsp can't be sent.
1000                  */
1001                 if (rc != -EALREADY)
1002                         atomic_inc(&nvmep->xmt_ls_abort);
1003                 return rc;
1004         }
1005
1006         atomic_inc(&nvmep->xmt_ls_rsp);
1007         return 0;
1008 }
1009
1010 static int
1011 lpfc_nvmet_xmt_fcp_op(struct nvmet_fc_target_port *tgtport,
1012                       struct nvmefc_tgt_fcp_req *rsp)
1013 {
1014         struct lpfc_nvmet_tgtport *lpfc_nvmep = tgtport->private;
1015         struct lpfc_async_xchg_ctx *ctxp =
1016                 container_of(rsp, struct lpfc_async_xchg_ctx, hdlrctx.fcp_req);
1017         struct lpfc_hba *phba = ctxp->phba;
1018         struct lpfc_queue *wq;
1019         struct lpfc_iocbq *nvmewqeq;
1020         struct lpfc_sli_ring *pring;
1021         unsigned long iflags;
1022         int rc;
1023 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1024         int id;
1025 #endif
1026
1027         if (phba->pport->load_flag & FC_UNLOADING) {
1028                 rc = -ENODEV;
1029                 goto aerr;
1030         }
1031
1032 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1033         if (ctxp->ts_cmd_nvme) {
1034                 if (rsp->op == NVMET_FCOP_RSP)
1035                         ctxp->ts_nvme_status = ktime_get_ns();
1036                 else
1037                         ctxp->ts_nvme_data = ktime_get_ns();
1038         }
1039
1040         /* Setup the hdw queue if not already set */
1041         if (!ctxp->hdwq)
1042                 ctxp->hdwq = &phba->sli4_hba.hdwq[rsp->hwqid];
1043
1044         if (phba->hdwqstat_on & LPFC_CHECK_NVMET_IO) {
1045                 id = raw_smp_processor_id();
1046                 this_cpu_inc(phba->sli4_hba.c_stat->xmt_io);
1047                 if (rsp->hwqid != id)
1048                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
1049                                         "6705 CPU Check OP: "
1050                                         "cpu %d expect %d\n",
1051                                         id, rsp->hwqid);
1052                 ctxp->cpu = id; /* Setup cpu for cmpl check */
1053         }
1054 #endif
1055
1056         /* Sanity check */
1057         if ((ctxp->flag & LPFC_NVME_ABTS_RCV) ||
1058             (ctxp->state == LPFC_NVME_STE_ABORT)) {
1059                 atomic_inc(&lpfc_nvmep->xmt_fcp_drop);
1060                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1061                                 "6102 IO oxid x%x aborted\n",
1062                                 ctxp->oxid);
1063                 rc = -ENXIO;
1064                 goto aerr;
1065         }
1066
1067         nvmewqeq = lpfc_nvmet_prep_fcp_wqe(phba, ctxp);
1068         if (nvmewqeq == NULL) {
1069                 atomic_inc(&lpfc_nvmep->xmt_fcp_drop);
1070                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1071                                 "6152 FCP Drop IO x%x: Prep\n",
1072                                 ctxp->oxid);
1073                 rc = -ENXIO;
1074                 goto aerr;
1075         }
1076
1077         nvmewqeq->cmd_cmpl = lpfc_nvmet_xmt_fcp_op_cmp;
1078         nvmewqeq->context_un.axchg = ctxp;
1079         nvmewqeq->cmd_flag |=  LPFC_IO_NVMET;
1080         ctxp->wqeq->hba_wqidx = rsp->hwqid;
1081
1082         lpfc_nvmeio_data(phba, "NVMET FCP CMND: xri x%x op x%x len x%x\n",
1083                          ctxp->oxid, rsp->op, rsp->rsplen);
1084
1085         ctxp->flag |= LPFC_NVME_IO_INP;
1086         rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, nvmewqeq);
1087         if (rc == WQE_SUCCESS) {
1088 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1089                 if (!ctxp->ts_cmd_nvme)
1090                         return 0;
1091                 if (rsp->op == NVMET_FCOP_RSP)
1092                         ctxp->ts_status_wqput = ktime_get_ns();
1093                 else
1094                         ctxp->ts_data_wqput = ktime_get_ns();
1095 #endif
1096                 return 0;
1097         }
1098
1099         if (rc == -EBUSY) {
1100                 /*
1101                  * WQ was full, so queue nvmewqeq to be sent after
1102                  * WQE release CQE
1103                  */
1104                 ctxp->flag |= LPFC_NVME_DEFER_WQFULL;
1105                 wq = ctxp->hdwq->io_wq;
1106                 pring = wq->pring;
1107                 spin_lock_irqsave(&pring->ring_lock, iflags);
1108                 list_add_tail(&nvmewqeq->list, &wq->wqfull_list);
1109                 wq->q_flag |= HBA_NVMET_WQFULL;
1110                 spin_unlock_irqrestore(&pring->ring_lock, iflags);
1111                 atomic_inc(&lpfc_nvmep->defer_wqfull);
1112                 return 0;
1113         }
1114
1115         /* Give back resources */
1116         atomic_inc(&lpfc_nvmep->xmt_fcp_drop);
1117         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1118                         "6153 FCP Drop IO x%x: Issue: %d\n",
1119                         ctxp->oxid, rc);
1120
1121         ctxp->wqeq->hba_wqidx = 0;
1122         nvmewqeq->context_un.axchg = NULL;
1123         nvmewqeq->bpl_dmabuf = NULL;
1124         rc = -EBUSY;
1125 aerr:
1126         return rc;
1127 }
1128
1129 static void
1130 lpfc_nvmet_targetport_delete(struct nvmet_fc_target_port *targetport)
1131 {
1132         struct lpfc_nvmet_tgtport *tport = targetport->private;
1133
1134         /* release any threads waiting for the unreg to complete */
1135         if (tport->phba->targetport)
1136                 complete(tport->tport_unreg_cmp);
1137 }
1138
1139 static void
1140 lpfc_nvmet_xmt_fcp_abort(struct nvmet_fc_target_port *tgtport,
1141                          struct nvmefc_tgt_fcp_req *req)
1142 {
1143         struct lpfc_nvmet_tgtport *lpfc_nvmep = tgtport->private;
1144         struct lpfc_async_xchg_ctx *ctxp =
1145                 container_of(req, struct lpfc_async_xchg_ctx, hdlrctx.fcp_req);
1146         struct lpfc_hba *phba = ctxp->phba;
1147         struct lpfc_queue *wq;
1148         unsigned long flags;
1149
1150         if (phba->pport->load_flag & FC_UNLOADING)
1151                 return;
1152
1153         if (!ctxp->hdwq)
1154                 ctxp->hdwq = &phba->sli4_hba.hdwq[0];
1155
1156         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1157                         "6103 NVMET Abort op: oxid x%x flg x%x ste %d\n",
1158                         ctxp->oxid, ctxp->flag, ctxp->state);
1159
1160         lpfc_nvmeio_data(phba, "NVMET FCP ABRT: xri x%x flg x%x ste x%x\n",
1161                          ctxp->oxid, ctxp->flag, ctxp->state);
1162
1163         atomic_inc(&lpfc_nvmep->xmt_fcp_abort);
1164
1165         spin_lock_irqsave(&ctxp->ctxlock, flags);
1166
1167         /* Since iaab/iaar are NOT set, we need to check
1168          * if the firmware is in process of aborting IO
1169          */
1170         if (ctxp->flag & (LPFC_NVME_XBUSY | LPFC_NVME_ABORT_OP)) {
1171                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
1172                 return;
1173         }
1174         ctxp->flag |= LPFC_NVME_ABORT_OP;
1175
1176         if (ctxp->flag & LPFC_NVME_DEFER_WQFULL) {
1177                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
1178                 lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid,
1179                                                  ctxp->oxid);
1180                 wq = ctxp->hdwq->io_wq;
1181                 lpfc_nvmet_wqfull_flush(phba, wq, ctxp);
1182                 return;
1183         }
1184         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
1185
1186         /* A state of LPFC_NVME_STE_RCV means we have just received
1187          * the NVME command and have not started processing it.
1188          * (by issuing any IO WQEs on this exchange yet)
1189          */
1190         if (ctxp->state == LPFC_NVME_STE_RCV)
1191                 lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid,
1192                                                  ctxp->oxid);
1193         else
1194                 lpfc_nvmet_sol_fcp_issue_abort(phba, ctxp, ctxp->sid,
1195                                                ctxp->oxid);
1196 }
1197
1198 static void
1199 lpfc_nvmet_xmt_fcp_release(struct nvmet_fc_target_port *tgtport,
1200                            struct nvmefc_tgt_fcp_req *rsp)
1201 {
1202         struct lpfc_nvmet_tgtport *lpfc_nvmep = tgtport->private;
1203         struct lpfc_async_xchg_ctx *ctxp =
1204                 container_of(rsp, struct lpfc_async_xchg_ctx, hdlrctx.fcp_req);
1205         struct lpfc_hba *phba = ctxp->phba;
1206         unsigned long flags;
1207         bool aborting = false;
1208
1209         spin_lock_irqsave(&ctxp->ctxlock, flags);
1210         if (ctxp->flag & LPFC_NVME_XBUSY)
1211                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
1212                                 "6027 NVMET release with XBUSY flag x%x"
1213                                 " oxid x%x\n",
1214                                 ctxp->flag, ctxp->oxid);
1215         else if (ctxp->state != LPFC_NVME_STE_DONE &&
1216                  ctxp->state != LPFC_NVME_STE_ABORT)
1217                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1218                                 "6413 NVMET release bad state %d %d oxid x%x\n",
1219                                 ctxp->state, ctxp->entry_cnt, ctxp->oxid);
1220
1221         if ((ctxp->flag & LPFC_NVME_ABORT_OP) ||
1222             (ctxp->flag & LPFC_NVME_XBUSY)) {
1223                 aborting = true;
1224                 /* let the abort path do the real release */
1225                 lpfc_nvmet_defer_release(phba, ctxp);
1226         }
1227         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
1228
1229         lpfc_nvmeio_data(phba, "NVMET FCP FREE: xri x%x ste %d abt %d\n", ctxp->oxid,
1230                          ctxp->state, aborting);
1231
1232         atomic_inc(&lpfc_nvmep->xmt_fcp_release);
1233         ctxp->flag &= ~LPFC_NVME_TNOTIFY;
1234
1235         if (aborting)
1236                 return;
1237
1238         lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
1239 }
1240
1241 static void
1242 lpfc_nvmet_defer_rcv(struct nvmet_fc_target_port *tgtport,
1243                      struct nvmefc_tgt_fcp_req *rsp)
1244 {
1245         struct lpfc_nvmet_tgtport *tgtp;
1246         struct lpfc_async_xchg_ctx *ctxp =
1247                 container_of(rsp, struct lpfc_async_xchg_ctx, hdlrctx.fcp_req);
1248         struct rqb_dmabuf *nvmebuf = ctxp->rqb_buffer;
1249         struct lpfc_hba *phba = ctxp->phba;
1250         unsigned long iflag;
1251
1252
1253         lpfc_nvmeio_data(phba, "NVMET DEFERRCV: xri x%x sz %d CPU %02x\n",
1254                          ctxp->oxid, ctxp->size, raw_smp_processor_id());
1255
1256         if (!nvmebuf) {
1257                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
1258                                 "6425 Defer rcv: no buffer oxid x%x: "
1259                                 "flg %x ste %x\n",
1260                                 ctxp->oxid, ctxp->flag, ctxp->state);
1261                 return;
1262         }
1263
1264         tgtp = phba->targetport->private;
1265         if (tgtp)
1266                 atomic_inc(&tgtp->rcv_fcp_cmd_defer);
1267
1268         /* Free the nvmebuf since a new buffer already replaced it */
1269         nvmebuf->hrq->rqbp->rqb_free_buffer(phba, nvmebuf);
1270         spin_lock_irqsave(&ctxp->ctxlock, iflag);
1271         ctxp->rqb_buffer = NULL;
1272         spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1273 }
1274
1275 /**
1276  * lpfc_nvmet_ls_req_cmp - completion handler for a nvme ls request
1277  * @phba: Pointer to HBA context object
1278  * @cmdwqe: Pointer to driver command WQE object.
1279  * @rspwqe: Pointer to driver response WQE object.
1280  *
1281  * This function is the completion handler for NVME LS requests.
1282  * The function updates any states and statistics, then calls the
1283  * generic completion handler to finish completion of the request.
1284  **/
1285 static void
1286 lpfc_nvmet_ls_req_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
1287                       struct lpfc_iocbq *rspwqe)
1288 {
1289         struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
1290         __lpfc_nvme_ls_req_cmp(phba, cmdwqe->vport, cmdwqe, wcqe);
1291 }
1292
1293 /**
1294  * lpfc_nvmet_ls_req - Issue an Link Service request
1295  * @targetport: pointer to target instance registered with nvmet transport.
1296  * @hosthandle: hosthandle set by the driver in a prior ls_rqst_rcv.
1297  *               Driver sets this value to the ndlp pointer.
1298  * @pnvme_lsreq: the transport nvme_ls_req structure for the LS
1299  *
1300  * Driver registers this routine to handle any link service request
1301  * from the nvme_fc transport to a remote nvme-aware port.
1302  *
1303  * Return value :
1304  *   0 - Success
1305  *   non-zero: various error codes, in form of -Exxx
1306  **/
1307 static int
1308 lpfc_nvmet_ls_req(struct nvmet_fc_target_port *targetport,
1309                   void *hosthandle,
1310                   struct nvmefc_ls_req *pnvme_lsreq)
1311 {
1312         struct lpfc_nvmet_tgtport *lpfc_nvmet = targetport->private;
1313         struct lpfc_hba *phba;
1314         struct lpfc_nodelist *ndlp;
1315         int ret;
1316         u32 hstate;
1317
1318         if (!lpfc_nvmet)
1319                 return -EINVAL;
1320
1321         phba = lpfc_nvmet->phba;
1322         if (phba->pport->load_flag & FC_UNLOADING)
1323                 return -EINVAL;
1324
1325         hstate = atomic_read(&lpfc_nvmet->state);
1326         if (hstate == LPFC_NVMET_INV_HOST_ACTIVE)
1327                 return -EACCES;
1328
1329         ndlp = (struct lpfc_nodelist *)hosthandle;
1330
1331         ret = __lpfc_nvme_ls_req(phba->pport, ndlp, pnvme_lsreq,
1332                                  lpfc_nvmet_ls_req_cmp);
1333
1334         return ret;
1335 }
1336
1337 /**
1338  * lpfc_nvmet_ls_abort - Abort a prior NVME LS request
1339  * @targetport: Transport targetport, that LS was issued from.
1340  * @hosthandle: hosthandle set by the driver in a prior ls_rqst_rcv.
1341  *               Driver sets this value to the ndlp pointer.
1342  * @pnvme_lsreq: the transport nvme_ls_req structure for LS to be aborted
1343  *
1344  * Driver registers this routine to abort an NVME LS request that is
1345  * in progress (from the transports perspective).
1346  **/
1347 static void
1348 lpfc_nvmet_ls_abort(struct nvmet_fc_target_port *targetport,
1349                     void *hosthandle,
1350                     struct nvmefc_ls_req *pnvme_lsreq)
1351 {
1352         struct lpfc_nvmet_tgtport *lpfc_nvmet = targetport->private;
1353         struct lpfc_hba *phba;
1354         struct lpfc_nodelist *ndlp;
1355         int ret;
1356
1357         phba = lpfc_nvmet->phba;
1358         if (phba->pport->load_flag & FC_UNLOADING)
1359                 return;
1360
1361         ndlp = (struct lpfc_nodelist *)hosthandle;
1362
1363         ret = __lpfc_nvme_ls_abort(phba->pport, ndlp, pnvme_lsreq);
1364         if (!ret)
1365                 atomic_inc(&lpfc_nvmet->xmt_ls_abort);
1366 }
1367
1368 static void
1369 lpfc_nvmet_host_release(void *hosthandle)
1370 {
1371         struct lpfc_nodelist *ndlp = hosthandle;
1372         struct lpfc_hba *phba = ndlp->phba;
1373         struct lpfc_nvmet_tgtport *tgtp;
1374
1375         if (!phba->targetport || !phba->targetport->private)
1376                 return;
1377
1378         lpfc_printf_log(phba, KERN_ERR, LOG_NVME,
1379                         "6202 NVMET XPT releasing hosthandle x%px "
1380                         "DID x%x xflags x%x refcnt %d\n",
1381                         hosthandle, ndlp->nlp_DID, ndlp->fc4_xpt_flags,
1382                         kref_read(&ndlp->kref));
1383         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
1384         spin_lock_irq(&ndlp->lock);
1385         ndlp->fc4_xpt_flags &= ~NLP_XPT_HAS_HH;
1386         spin_unlock_irq(&ndlp->lock);
1387         lpfc_nlp_put(ndlp);
1388         atomic_set(&tgtp->state, 0);
1389 }
1390
1391 static void
1392 lpfc_nvmet_discovery_event(struct nvmet_fc_target_port *tgtport)
1393 {
1394         struct lpfc_nvmet_tgtport *tgtp;
1395         struct lpfc_hba *phba;
1396         uint32_t rc;
1397
1398         tgtp = tgtport->private;
1399         phba = tgtp->phba;
1400
1401         rc = lpfc_issue_els_rscn(phba->pport, 0);
1402         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1403                         "6420 NVMET subsystem change: Notification %s\n",
1404                         (rc) ? "Failed" : "Sent");
1405 }
1406
1407 static struct nvmet_fc_target_template lpfc_tgttemplate = {
1408         .targetport_delete = lpfc_nvmet_targetport_delete,
1409         .xmt_ls_rsp     = lpfc_nvmet_xmt_ls_rsp,
1410         .fcp_op         = lpfc_nvmet_xmt_fcp_op,
1411         .fcp_abort      = lpfc_nvmet_xmt_fcp_abort,
1412         .fcp_req_release = lpfc_nvmet_xmt_fcp_release,
1413         .defer_rcv      = lpfc_nvmet_defer_rcv,
1414         .discovery_event = lpfc_nvmet_discovery_event,
1415         .ls_req         = lpfc_nvmet_ls_req,
1416         .ls_abort       = lpfc_nvmet_ls_abort,
1417         .host_release   = lpfc_nvmet_host_release,
1418
1419         .max_hw_queues  = 1,
1420         .max_sgl_segments = LPFC_NVMET_DEFAULT_SEGS,
1421         .max_dif_sgl_segments = LPFC_NVMET_DEFAULT_SEGS,
1422         .dma_boundary = 0xFFFFFFFF,
1423
1424         /* optional features */
1425         .target_features = 0,
1426         /* sizes of additional private data for data structures */
1427         .target_priv_sz = sizeof(struct lpfc_nvmet_tgtport),
1428         .lsrqst_priv_sz = 0,
1429 };
1430
1431 static void
1432 __lpfc_nvmet_clean_io_for_cpu(struct lpfc_hba *phba,
1433                 struct lpfc_nvmet_ctx_info *infop)
1434 {
1435         struct lpfc_nvmet_ctxbuf *ctx_buf, *next_ctx_buf;
1436         unsigned long flags;
1437
1438         spin_lock_irqsave(&infop->nvmet_ctx_list_lock, flags);
1439         list_for_each_entry_safe(ctx_buf, next_ctx_buf,
1440                                 &infop->nvmet_ctx_list, list) {
1441                 spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1442                 list_del_init(&ctx_buf->list);
1443                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1444
1445                 spin_lock(&phba->hbalock);
1446                 __lpfc_clear_active_sglq(phba, ctx_buf->sglq->sli4_lxritag);
1447                 spin_unlock(&phba->hbalock);
1448
1449                 ctx_buf->sglq->state = SGL_FREED;
1450                 ctx_buf->sglq->ndlp = NULL;
1451
1452                 spin_lock(&phba->sli4_hba.sgl_list_lock);
1453                 list_add_tail(&ctx_buf->sglq->list,
1454                                 &phba->sli4_hba.lpfc_nvmet_sgl_list);
1455                 spin_unlock(&phba->sli4_hba.sgl_list_lock);
1456
1457                 lpfc_sli_release_iocbq(phba, ctx_buf->iocbq);
1458                 kfree(ctx_buf->context);
1459         }
1460         spin_unlock_irqrestore(&infop->nvmet_ctx_list_lock, flags);
1461 }
1462
1463 static void
1464 lpfc_nvmet_cleanup_io_context(struct lpfc_hba *phba)
1465 {
1466         struct lpfc_nvmet_ctx_info *infop;
1467         int i, j;
1468
1469         /* The first context list, MRQ 0 CPU 0 */
1470         infop = phba->sli4_hba.nvmet_ctx_info;
1471         if (!infop)
1472                 return;
1473
1474         /* Cycle the the entire CPU context list for every MRQ */
1475         for (i = 0; i < phba->cfg_nvmet_mrq; i++) {
1476                 for_each_present_cpu(j) {
1477                         infop = lpfc_get_ctx_list(phba, j, i);
1478                         __lpfc_nvmet_clean_io_for_cpu(phba, infop);
1479                 }
1480         }
1481         kfree(phba->sli4_hba.nvmet_ctx_info);
1482         phba->sli4_hba.nvmet_ctx_info = NULL;
1483 }
1484
1485 static int
1486 lpfc_nvmet_setup_io_context(struct lpfc_hba *phba)
1487 {
1488         struct lpfc_nvmet_ctxbuf *ctx_buf;
1489         struct lpfc_iocbq *nvmewqe;
1490         union lpfc_wqe128 *wqe;
1491         struct lpfc_nvmet_ctx_info *last_infop;
1492         struct lpfc_nvmet_ctx_info *infop;
1493         int i, j, idx, cpu;
1494
1495         lpfc_printf_log(phba, KERN_INFO, LOG_NVME,
1496                         "6403 Allocate NVMET resources for %d XRIs\n",
1497                         phba->sli4_hba.nvmet_xri_cnt);
1498
1499         phba->sli4_hba.nvmet_ctx_info = kcalloc(
1500                 phba->sli4_hba.num_possible_cpu * phba->cfg_nvmet_mrq,
1501                 sizeof(struct lpfc_nvmet_ctx_info), GFP_KERNEL);
1502         if (!phba->sli4_hba.nvmet_ctx_info) {
1503                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1504                                 "6419 Failed allocate memory for "
1505                                 "nvmet context lists\n");
1506                 return -ENOMEM;
1507         }
1508
1509         /*
1510          * Assuming X CPUs in the system, and Y MRQs, allocate some
1511          * lpfc_nvmet_ctx_info structures as follows:
1512          *
1513          * cpu0/mrq0 cpu1/mrq0 ... cpuX/mrq0
1514          * cpu0/mrq1 cpu1/mrq1 ... cpuX/mrq1
1515          * ...
1516          * cpuX/mrqY cpuX/mrqY ... cpuX/mrqY
1517          *
1518          * Each line represents a MRQ "silo" containing an entry for
1519          * every CPU.
1520          *
1521          * MRQ X is initially assumed to be associated with CPU X, thus
1522          * contexts are initially distributed across all MRQs using
1523          * the MRQ index (N) as follows cpuN/mrqN. When contexts are
1524          * freed, the are freed to the MRQ silo based on the CPU number
1525          * of the IO completion. Thus a context that was allocated for MRQ A
1526          * whose IO completed on CPU B will be freed to cpuB/mrqA.
1527          */
1528         for_each_possible_cpu(i) {
1529                 for (j = 0; j < phba->cfg_nvmet_mrq; j++) {
1530                         infop = lpfc_get_ctx_list(phba, i, j);
1531                         INIT_LIST_HEAD(&infop->nvmet_ctx_list);
1532                         spin_lock_init(&infop->nvmet_ctx_list_lock);
1533                         infop->nvmet_ctx_list_cnt = 0;
1534                 }
1535         }
1536
1537         /*
1538          * Setup the next CPU context info ptr for each MRQ.
1539          * MRQ 0 will cycle thru CPUs 0 - X separately from
1540          * MRQ 1 cycling thru CPUs 0 - X, and so on.
1541          */
1542         for (j = 0; j < phba->cfg_nvmet_mrq; j++) {
1543                 last_infop = lpfc_get_ctx_list(phba,
1544                                                cpumask_first(cpu_present_mask),
1545                                                j);
1546                 for (i = phba->sli4_hba.num_possible_cpu - 1;  i >= 0; i--) {
1547                         infop = lpfc_get_ctx_list(phba, i, j);
1548                         infop->nvmet_ctx_next_cpu = last_infop;
1549                         last_infop = infop;
1550                 }
1551         }
1552
1553         /* For all nvmet xris, allocate resources needed to process a
1554          * received command on a per xri basis.
1555          */
1556         idx = 0;
1557         cpu = cpumask_first(cpu_present_mask);
1558         for (i = 0; i < phba->sli4_hba.nvmet_xri_cnt; i++) {
1559                 ctx_buf = kzalloc(sizeof(*ctx_buf), GFP_KERNEL);
1560                 if (!ctx_buf) {
1561                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1562                                         "6404 Ran out of memory for NVMET\n");
1563                         return -ENOMEM;
1564                 }
1565
1566                 ctx_buf->context = kzalloc(sizeof(*ctx_buf->context),
1567                                            GFP_KERNEL);
1568                 if (!ctx_buf->context) {
1569                         kfree(ctx_buf);
1570                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1571                                         "6405 Ran out of NVMET "
1572                                         "context memory\n");
1573                         return -ENOMEM;
1574                 }
1575                 ctx_buf->context->ctxbuf = ctx_buf;
1576                 ctx_buf->context->state = LPFC_NVME_STE_FREE;
1577
1578                 ctx_buf->iocbq = lpfc_sli_get_iocbq(phba);
1579                 if (!ctx_buf->iocbq) {
1580                         kfree(ctx_buf->context);
1581                         kfree(ctx_buf);
1582                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1583                                         "6406 Ran out of NVMET iocb/WQEs\n");
1584                         return -ENOMEM;
1585                 }
1586                 ctx_buf->iocbq->cmd_flag = LPFC_IO_NVMET;
1587                 nvmewqe = ctx_buf->iocbq;
1588                 wqe = &nvmewqe->wqe;
1589
1590                 /* Initialize WQE */
1591                 memset(wqe, 0, sizeof(union lpfc_wqe));
1592
1593                 ctx_buf->iocbq->cmd_dmabuf = NULL;
1594                 spin_lock(&phba->sli4_hba.sgl_list_lock);
1595                 ctx_buf->sglq = __lpfc_sli_get_nvmet_sglq(phba, ctx_buf->iocbq);
1596                 spin_unlock(&phba->sli4_hba.sgl_list_lock);
1597                 if (!ctx_buf->sglq) {
1598                         lpfc_sli_release_iocbq(phba, ctx_buf->iocbq);
1599                         kfree(ctx_buf->context);
1600                         kfree(ctx_buf);
1601                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1602                                         "6407 Ran out of NVMET XRIs\n");
1603                         return -ENOMEM;
1604                 }
1605                 INIT_WORK(&ctx_buf->defer_work, lpfc_nvmet_fcp_rqst_defer_work);
1606
1607                 /*
1608                  * Add ctx to MRQidx context list. Our initial assumption
1609                  * is MRQidx will be associated with CPUidx. This association
1610                  * can change on the fly.
1611                  */
1612                 infop = lpfc_get_ctx_list(phba, cpu, idx);
1613                 spin_lock(&infop->nvmet_ctx_list_lock);
1614                 list_add_tail(&ctx_buf->list, &infop->nvmet_ctx_list);
1615                 infop->nvmet_ctx_list_cnt++;
1616                 spin_unlock(&infop->nvmet_ctx_list_lock);
1617
1618                 /* Spread ctx structures evenly across all MRQs */
1619                 idx++;
1620                 if (idx >= phba->cfg_nvmet_mrq) {
1621                         idx = 0;
1622                         cpu = cpumask_first(cpu_present_mask);
1623                         continue;
1624                 }
1625                 cpu = cpumask_next(cpu, cpu_present_mask);
1626                 if (cpu == nr_cpu_ids)
1627                         cpu = cpumask_first(cpu_present_mask);
1628
1629         }
1630
1631         for_each_present_cpu(i) {
1632                 for (j = 0; j < phba->cfg_nvmet_mrq; j++) {
1633                         infop = lpfc_get_ctx_list(phba, i, j);
1634                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME | LOG_INIT,
1635                                         "6408 TOTAL NVMET ctx for CPU %d "
1636                                         "MRQ %d: cnt %d nextcpu x%px\n",
1637                                         i, j, infop->nvmet_ctx_list_cnt,
1638                                         infop->nvmet_ctx_next_cpu);
1639                 }
1640         }
1641         return 0;
1642 }
1643
1644 int
1645 lpfc_nvmet_create_targetport(struct lpfc_hba *phba)
1646 {
1647         struct lpfc_vport  *vport = phba->pport;
1648         struct lpfc_nvmet_tgtport *tgtp;
1649         struct nvmet_fc_port_info pinfo;
1650         int error;
1651
1652         if (phba->targetport)
1653                 return 0;
1654
1655         error = lpfc_nvmet_setup_io_context(phba);
1656         if (error)
1657                 return error;
1658
1659         memset(&pinfo, 0, sizeof(struct nvmet_fc_port_info));
1660         pinfo.node_name = wwn_to_u64(vport->fc_nodename.u.wwn);
1661         pinfo.port_name = wwn_to_u64(vport->fc_portname.u.wwn);
1662         pinfo.port_id = vport->fc_myDID;
1663
1664         /* We need to tell the transport layer + 1 because it takes page
1665          * alignment into account. When space for the SGL is allocated we
1666          * allocate + 3, one for cmd, one for rsp and one for this alignment
1667          */
1668         lpfc_tgttemplate.max_sgl_segments = phba->cfg_nvme_seg_cnt + 1;
1669         lpfc_tgttemplate.max_hw_queues = phba->cfg_hdw_queue;
1670         lpfc_tgttemplate.target_features = NVMET_FCTGTFEAT_READDATA_RSP;
1671
1672 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
1673         error = nvmet_fc_register_targetport(&pinfo, &lpfc_tgttemplate,
1674                                              &phba->pcidev->dev,
1675                                              &phba->targetport);
1676 #else
1677         error = -ENOENT;
1678 #endif
1679         if (error) {
1680                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1681                                 "6025 Cannot register NVME targetport x%x: "
1682                                 "portnm %llx nodenm %llx segs %d qs %d\n",
1683                                 error,
1684                                 pinfo.port_name, pinfo.node_name,
1685                                 lpfc_tgttemplate.max_sgl_segments,
1686                                 lpfc_tgttemplate.max_hw_queues);
1687                 phba->targetport = NULL;
1688                 phba->nvmet_support = 0;
1689
1690                 lpfc_nvmet_cleanup_io_context(phba);
1691
1692         } else {
1693                 tgtp = (struct lpfc_nvmet_tgtport *)
1694                         phba->targetport->private;
1695                 tgtp->phba = phba;
1696
1697                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
1698                                 "6026 Registered NVME "
1699                                 "targetport: x%px, private x%px "
1700                                 "portnm %llx nodenm %llx segs %d qs %d\n",
1701                                 phba->targetport, tgtp,
1702                                 pinfo.port_name, pinfo.node_name,
1703                                 lpfc_tgttemplate.max_sgl_segments,
1704                                 lpfc_tgttemplate.max_hw_queues);
1705
1706                 atomic_set(&tgtp->rcv_ls_req_in, 0);
1707                 atomic_set(&tgtp->rcv_ls_req_out, 0);
1708                 atomic_set(&tgtp->rcv_ls_req_drop, 0);
1709                 atomic_set(&tgtp->xmt_ls_abort, 0);
1710                 atomic_set(&tgtp->xmt_ls_abort_cmpl, 0);
1711                 atomic_set(&tgtp->xmt_ls_rsp, 0);
1712                 atomic_set(&tgtp->xmt_ls_drop, 0);
1713                 atomic_set(&tgtp->xmt_ls_rsp_error, 0);
1714                 atomic_set(&tgtp->xmt_ls_rsp_xb_set, 0);
1715                 atomic_set(&tgtp->xmt_ls_rsp_aborted, 0);
1716                 atomic_set(&tgtp->xmt_ls_rsp_cmpl, 0);
1717                 atomic_set(&tgtp->rcv_fcp_cmd_in, 0);
1718                 atomic_set(&tgtp->rcv_fcp_cmd_out, 0);
1719                 atomic_set(&tgtp->rcv_fcp_cmd_drop, 0);
1720                 atomic_set(&tgtp->xmt_fcp_drop, 0);
1721                 atomic_set(&tgtp->xmt_fcp_read_rsp, 0);
1722                 atomic_set(&tgtp->xmt_fcp_read, 0);
1723                 atomic_set(&tgtp->xmt_fcp_write, 0);
1724                 atomic_set(&tgtp->xmt_fcp_rsp, 0);
1725                 atomic_set(&tgtp->xmt_fcp_release, 0);
1726                 atomic_set(&tgtp->xmt_fcp_rsp_cmpl, 0);
1727                 atomic_set(&tgtp->xmt_fcp_rsp_error, 0);
1728                 atomic_set(&tgtp->xmt_fcp_rsp_xb_set, 0);
1729                 atomic_set(&tgtp->xmt_fcp_rsp_aborted, 0);
1730                 atomic_set(&tgtp->xmt_fcp_rsp_drop, 0);
1731                 atomic_set(&tgtp->xmt_fcp_xri_abort_cqe, 0);
1732                 atomic_set(&tgtp->xmt_fcp_abort, 0);
1733                 atomic_set(&tgtp->xmt_fcp_abort_cmpl, 0);
1734                 atomic_set(&tgtp->xmt_abort_unsol, 0);
1735                 atomic_set(&tgtp->xmt_abort_sol, 0);
1736                 atomic_set(&tgtp->xmt_abort_rsp, 0);
1737                 atomic_set(&tgtp->xmt_abort_rsp_error, 0);
1738                 atomic_set(&tgtp->defer_ctx, 0);
1739                 atomic_set(&tgtp->defer_fod, 0);
1740                 atomic_set(&tgtp->defer_wqfull, 0);
1741         }
1742         return error;
1743 }
1744
1745 int
1746 lpfc_nvmet_update_targetport(struct lpfc_hba *phba)
1747 {
1748         struct lpfc_vport  *vport = phba->pport;
1749
1750         if (!phba->targetport)
1751                 return 0;
1752
1753         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
1754                          "6007 Update NVMET port x%px did x%x\n",
1755                          phba->targetport, vport->fc_myDID);
1756
1757         phba->targetport->port_id = vport->fc_myDID;
1758         return 0;
1759 }
1760
1761 /**
1762  * lpfc_sli4_nvmet_xri_aborted - Fast-path process of nvmet xri abort
1763  * @phba: pointer to lpfc hba data structure.
1764  * @axri: pointer to the nvmet xri abort wcqe structure.
1765  *
1766  * This routine is invoked by the worker thread to process a SLI4 fast-path
1767  * NVMET aborted xri.
1768  **/
1769 void
1770 lpfc_sli4_nvmet_xri_aborted(struct lpfc_hba *phba,
1771                             struct sli4_wcqe_xri_aborted *axri)
1772 {
1773 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
1774         uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
1775         uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
1776         struct lpfc_async_xchg_ctx *ctxp, *next_ctxp;
1777         struct lpfc_nvmet_tgtport *tgtp;
1778         struct nvmefc_tgt_fcp_req *req = NULL;
1779         struct lpfc_nodelist *ndlp;
1780         unsigned long iflag = 0;
1781         int rrq_empty = 0;
1782         bool released = false;
1783
1784         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1785                         "6317 XB aborted xri x%x rxid x%x\n", xri, rxid);
1786
1787         if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_NVME))
1788                 return;
1789
1790         if (phba->targetport) {
1791                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
1792                 atomic_inc(&tgtp->xmt_fcp_xri_abort_cqe);
1793         }
1794
1795         spin_lock_irqsave(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1796         list_for_each_entry_safe(ctxp, next_ctxp,
1797                                  &phba->sli4_hba.lpfc_abts_nvmet_ctx_list,
1798                                  list) {
1799                 if (ctxp->ctxbuf->sglq->sli4_xritag != xri)
1800                         continue;
1801
1802                 spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock,
1803                                        iflag);
1804
1805                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
1806                 /* Check if we already received a free context call
1807                  * and we have completed processing an abort situation.
1808                  */
1809                 if (ctxp->flag & LPFC_NVME_CTX_RLS &&
1810                     !(ctxp->flag & LPFC_NVME_ABORT_OP)) {
1811                         spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1812                         list_del_init(&ctxp->list);
1813                         spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1814                         released = true;
1815                 }
1816                 ctxp->flag &= ~LPFC_NVME_XBUSY;
1817                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1818
1819                 rrq_empty = list_empty(&phba->active_rrq_list);
1820                 ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
1821                 if (ndlp &&
1822                     (ndlp->nlp_state == NLP_STE_UNMAPPED_NODE ||
1823                      ndlp->nlp_state == NLP_STE_MAPPED_NODE)) {
1824                         lpfc_set_rrq_active(phba, ndlp,
1825                                 ctxp->ctxbuf->sglq->sli4_lxritag,
1826                                 rxid, 1);
1827                         lpfc_sli4_abts_err_handler(phba, ndlp, axri);
1828                 }
1829
1830                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1831                                 "6318 XB aborted oxid x%x flg x%x (%x)\n",
1832                                 ctxp->oxid, ctxp->flag, released);
1833                 if (released)
1834                         lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
1835
1836                 if (rrq_empty)
1837                         lpfc_worker_wake_up(phba);
1838                 return;
1839         }
1840         spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1841         ctxp = lpfc_nvmet_get_ctx_for_xri(phba, xri);
1842         if (ctxp) {
1843                 /*
1844                  *  Abort already done by FW, so BA_ACC sent.
1845                  *  However, the transport may be unaware.
1846                  */
1847                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1848                                 "6323 NVMET Rcv ABTS xri x%x ctxp state x%x "
1849                                 "flag x%x oxid x%x rxid x%x\n",
1850                                 xri, ctxp->state, ctxp->flag, ctxp->oxid,
1851                                 rxid);
1852
1853                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
1854                 ctxp->flag |= LPFC_NVME_ABTS_RCV;
1855                 ctxp->state = LPFC_NVME_STE_ABORT;
1856                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1857
1858                 lpfc_nvmeio_data(phba,
1859                                  "NVMET ABTS RCV: xri x%x CPU %02x rjt %d\n",
1860                                  xri, raw_smp_processor_id(), 0);
1861
1862                 req = &ctxp->hdlrctx.fcp_req;
1863                 if (req)
1864                         nvmet_fc_rcv_fcp_abort(phba->targetport, req);
1865         }
1866 #endif
1867 }
1868
1869 int
1870 lpfc_nvmet_rcv_unsol_abort(struct lpfc_vport *vport,
1871                            struct fc_frame_header *fc_hdr)
1872 {
1873 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
1874         struct lpfc_hba *phba = vport->phba;
1875         struct lpfc_async_xchg_ctx *ctxp, *next_ctxp;
1876         struct nvmefc_tgt_fcp_req *rsp;
1877         uint32_t sid;
1878         uint16_t oxid, xri;
1879         unsigned long iflag = 0;
1880
1881         sid = sli4_sid_from_fc_hdr(fc_hdr);
1882         oxid = be16_to_cpu(fc_hdr->fh_ox_id);
1883
1884         spin_lock_irqsave(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1885         list_for_each_entry_safe(ctxp, next_ctxp,
1886                                  &phba->sli4_hba.lpfc_abts_nvmet_ctx_list,
1887                                  list) {
1888                 if (ctxp->oxid != oxid || ctxp->sid != sid)
1889                         continue;
1890
1891                 xri = ctxp->ctxbuf->sglq->sli4_xritag;
1892
1893                 spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock,
1894                                        iflag);
1895                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
1896                 ctxp->flag |= LPFC_NVME_ABTS_RCV;
1897                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1898
1899                 lpfc_nvmeio_data(phba,
1900                         "NVMET ABTS RCV: xri x%x CPU %02x rjt %d\n",
1901                         xri, raw_smp_processor_id(), 0);
1902
1903                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1904                                 "6319 NVMET Rcv ABTS:acc xri x%x\n", xri);
1905
1906                 rsp = &ctxp->hdlrctx.fcp_req;
1907                 nvmet_fc_rcv_fcp_abort(phba->targetport, rsp);
1908
1909                 /* Respond with BA_ACC accordingly */
1910                 lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 1);
1911                 return 0;
1912         }
1913         spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1914         /* check the wait list */
1915         if (phba->sli4_hba.nvmet_io_wait_cnt) {
1916                 struct rqb_dmabuf *nvmebuf;
1917                 struct fc_frame_header *fc_hdr_tmp;
1918                 u32 sid_tmp;
1919                 u16 oxid_tmp;
1920                 bool found = false;
1921
1922                 spin_lock_irqsave(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
1923
1924                 /* match by oxid and s_id */
1925                 list_for_each_entry(nvmebuf,
1926                                     &phba->sli4_hba.lpfc_nvmet_io_wait_list,
1927                                     hbuf.list) {
1928                         fc_hdr_tmp = (struct fc_frame_header *)
1929                                         (nvmebuf->hbuf.virt);
1930                         oxid_tmp = be16_to_cpu(fc_hdr_tmp->fh_ox_id);
1931                         sid_tmp = sli4_sid_from_fc_hdr(fc_hdr_tmp);
1932                         if (oxid_tmp != oxid || sid_tmp != sid)
1933                                 continue;
1934
1935                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1936                                         "6321 NVMET Rcv ABTS oxid x%x from x%x "
1937                                         "is waiting for a ctxp\n",
1938                                         oxid, sid);
1939
1940                         list_del_init(&nvmebuf->hbuf.list);
1941                         phba->sli4_hba.nvmet_io_wait_cnt--;
1942                         found = true;
1943                         break;
1944                 }
1945                 spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock,
1946                                        iflag);
1947
1948                 /* free buffer since already posted a new DMA buffer to RQ */
1949                 if (found) {
1950                         nvmebuf->hrq->rqbp->rqb_free_buffer(phba, nvmebuf);
1951                         /* Respond with BA_ACC accordingly */
1952                         lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 1);
1953                         return 0;
1954                 }
1955         }
1956
1957         /* check active list */
1958         ctxp = lpfc_nvmet_get_ctx_for_oxid(phba, oxid, sid);
1959         if (ctxp) {
1960                 xri = ctxp->ctxbuf->sglq->sli4_xritag;
1961
1962                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
1963                 ctxp->flag |= (LPFC_NVME_ABTS_RCV | LPFC_NVME_ABORT_OP);
1964                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1965
1966                 lpfc_nvmeio_data(phba,
1967                                  "NVMET ABTS RCV: xri x%x CPU %02x rjt %d\n",
1968                                  xri, raw_smp_processor_id(), 0);
1969
1970                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1971                                 "6322 NVMET Rcv ABTS:acc oxid x%x xri x%x "
1972                                 "flag x%x state x%x\n",
1973                                 ctxp->oxid, xri, ctxp->flag, ctxp->state);
1974
1975                 if (ctxp->flag & LPFC_NVME_TNOTIFY) {
1976                         /* Notify the transport */
1977                         nvmet_fc_rcv_fcp_abort(phba->targetport,
1978                                                &ctxp->hdlrctx.fcp_req);
1979                 } else {
1980                         cancel_work_sync(&ctxp->ctxbuf->defer_work);
1981                         spin_lock_irqsave(&ctxp->ctxlock, iflag);
1982                         lpfc_nvmet_defer_release(phba, ctxp);
1983                         spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1984                 }
1985                 lpfc_nvmet_sol_fcp_issue_abort(phba, ctxp, ctxp->sid,
1986                                                ctxp->oxid);
1987
1988                 lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 1);
1989                 return 0;
1990         }
1991
1992         lpfc_nvmeio_data(phba, "NVMET ABTS RCV: oxid x%x CPU %02x rjt %d\n",
1993                          oxid, raw_smp_processor_id(), 1);
1994
1995         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1996                         "6320 NVMET Rcv ABTS:rjt oxid x%x\n", oxid);
1997
1998         /* Respond with BA_RJT accordingly */
1999         lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 0);
2000 #endif
2001         return 0;
2002 }
2003
2004 static void
2005 lpfc_nvmet_wqfull_flush(struct lpfc_hba *phba, struct lpfc_queue *wq,
2006                         struct lpfc_async_xchg_ctx *ctxp)
2007 {
2008         struct lpfc_sli_ring *pring;
2009         struct lpfc_iocbq *nvmewqeq;
2010         struct lpfc_iocbq *next_nvmewqeq;
2011         unsigned long iflags;
2012         struct lpfc_wcqe_complete wcqe;
2013         struct lpfc_wcqe_complete *wcqep;
2014
2015         pring = wq->pring;
2016         wcqep = &wcqe;
2017
2018         /* Fake an ABORT error code back to cmpl routine */
2019         memset(wcqep, 0, sizeof(struct lpfc_wcqe_complete));
2020         bf_set(lpfc_wcqe_c_status, wcqep, IOSTAT_LOCAL_REJECT);
2021         wcqep->parameter = IOERR_ABORT_REQUESTED;
2022
2023         spin_lock_irqsave(&pring->ring_lock, iflags);
2024         list_for_each_entry_safe(nvmewqeq, next_nvmewqeq,
2025                                  &wq->wqfull_list, list) {
2026                 if (ctxp) {
2027                         /* Checking for a specific IO to flush */
2028                         if (nvmewqeq->context_un.axchg == ctxp) {
2029                                 list_del(&nvmewqeq->list);
2030                                 spin_unlock_irqrestore(&pring->ring_lock,
2031                                                        iflags);
2032                                 memcpy(&nvmewqeq->wcqe_cmpl, wcqep,
2033                                        sizeof(*wcqep));
2034                                 lpfc_nvmet_xmt_fcp_op_cmp(phba, nvmewqeq,
2035                                                           nvmewqeq);
2036                                 return;
2037                         }
2038                         continue;
2039                 } else {
2040                         /* Flush all IOs */
2041                         list_del(&nvmewqeq->list);
2042                         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2043                         memcpy(&nvmewqeq->wcqe_cmpl, wcqep, sizeof(*wcqep));
2044                         lpfc_nvmet_xmt_fcp_op_cmp(phba, nvmewqeq, nvmewqeq);
2045                         spin_lock_irqsave(&pring->ring_lock, iflags);
2046                 }
2047         }
2048         if (!ctxp)
2049                 wq->q_flag &= ~HBA_NVMET_WQFULL;
2050         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2051 }
2052
2053 void
2054 lpfc_nvmet_wqfull_process(struct lpfc_hba *phba,
2055                           struct lpfc_queue *wq)
2056 {
2057 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2058         struct lpfc_sli_ring *pring;
2059         struct lpfc_iocbq *nvmewqeq;
2060         struct lpfc_async_xchg_ctx *ctxp;
2061         unsigned long iflags;
2062         int rc;
2063
2064         /*
2065          * Some WQE slots are available, so try to re-issue anything
2066          * on the WQ wqfull_list.
2067          */
2068         pring = wq->pring;
2069         spin_lock_irqsave(&pring->ring_lock, iflags);
2070         while (!list_empty(&wq->wqfull_list)) {
2071                 list_remove_head(&wq->wqfull_list, nvmewqeq, struct lpfc_iocbq,
2072                                  list);
2073                 spin_unlock_irqrestore(&pring->ring_lock, iflags);
2074                 ctxp = nvmewqeq->context_un.axchg;
2075                 rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, nvmewqeq);
2076                 spin_lock_irqsave(&pring->ring_lock, iflags);
2077                 if (rc == -EBUSY) {
2078                         /* WQ was full again, so put it back on the list */
2079                         list_add(&nvmewqeq->list, &wq->wqfull_list);
2080                         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2081                         return;
2082                 }
2083                 if (rc == WQE_SUCCESS) {
2084 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2085                         if (ctxp->ts_cmd_nvme) {
2086                                 if (ctxp->hdlrctx.fcp_req.op == NVMET_FCOP_RSP)
2087                                         ctxp->ts_status_wqput = ktime_get_ns();
2088                                 else
2089                                         ctxp->ts_data_wqput = ktime_get_ns();
2090                         }
2091 #endif
2092                 } else {
2093                         WARN_ON(rc);
2094                 }
2095         }
2096         wq->q_flag &= ~HBA_NVMET_WQFULL;
2097         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2098
2099 #endif
2100 }
2101
2102 void
2103 lpfc_nvmet_destroy_targetport(struct lpfc_hba *phba)
2104 {
2105 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2106         struct lpfc_nvmet_tgtport *tgtp;
2107         struct lpfc_queue *wq;
2108         uint32_t qidx;
2109         DECLARE_COMPLETION_ONSTACK(tport_unreg_cmp);
2110
2111         if (phba->nvmet_support == 0)
2112                 return;
2113         if (phba->targetport) {
2114                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2115                 for (qidx = 0; qidx < phba->cfg_hdw_queue; qidx++) {
2116                         wq = phba->sli4_hba.hdwq[qidx].io_wq;
2117                         lpfc_nvmet_wqfull_flush(phba, wq, NULL);
2118                 }
2119                 tgtp->tport_unreg_cmp = &tport_unreg_cmp;
2120                 nvmet_fc_unregister_targetport(phba->targetport);
2121                 if (!wait_for_completion_timeout(&tport_unreg_cmp,
2122                                         msecs_to_jiffies(LPFC_NVMET_WAIT_TMO)))
2123                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2124                                         "6179 Unreg targetport x%px timeout "
2125                                         "reached.\n", phba->targetport);
2126                 lpfc_nvmet_cleanup_io_context(phba);
2127         }
2128         phba->targetport = NULL;
2129 #endif
2130 }
2131
2132 /**
2133  * lpfc_nvmet_handle_lsreq - Process an NVME LS request
2134  * @phba: pointer to lpfc hba data structure.
2135  * @axchg: pointer to exchange context for the NVME LS request
2136  *
2137  * This routine is used for processing an asychronously received NVME LS
2138  * request. Any remaining validation is done and the LS is then forwarded
2139  * to the nvmet-fc transport via nvmet_fc_rcv_ls_req().
2140  *
2141  * The calling sequence should be: nvmet_fc_rcv_ls_req() -> (processing)
2142  * -> lpfc_nvmet_xmt_ls_rsp/cmp -> req->done.
2143  * lpfc_nvme_xmt_ls_rsp_cmp should free the allocated axchg.
2144  *
2145  * Returns 0 if LS was handled and delivered to the transport
2146  * Returns 1 if LS failed to be handled and should be dropped
2147  */
2148 int
2149 lpfc_nvmet_handle_lsreq(struct lpfc_hba *phba,
2150                         struct lpfc_async_xchg_ctx *axchg)
2151 {
2152 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2153         struct lpfc_nvmet_tgtport *tgtp = phba->targetport->private;
2154         uint32_t *payload = axchg->payload;
2155         int rc;
2156
2157         atomic_inc(&tgtp->rcv_ls_req_in);
2158
2159         /*
2160          * Driver passes the ndlp as the hosthandle argument allowing
2161          * the transport to generate LS requests for any associateions
2162          * that are created.
2163          */
2164         rc = nvmet_fc_rcv_ls_req(phba->targetport, axchg->ndlp, &axchg->ls_rsp,
2165                                  axchg->payload, axchg->size);
2166
2167         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
2168                         "6037 NVMET Unsol rcv: sz %d rc %d: %08x %08x %08x "
2169                         "%08x %08x %08x\n", axchg->size, rc,
2170                         *payload, *(payload+1), *(payload+2),
2171                         *(payload+3), *(payload+4), *(payload+5));
2172
2173         if (!rc) {
2174                 atomic_inc(&tgtp->rcv_ls_req_out);
2175                 return 0;
2176         }
2177
2178         atomic_inc(&tgtp->rcv_ls_req_drop);
2179 #endif
2180         return 1;
2181 }
2182
2183 static void
2184 lpfc_nvmet_process_rcv_fcp_req(struct lpfc_nvmet_ctxbuf *ctx_buf)
2185 {
2186 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2187         struct lpfc_async_xchg_ctx *ctxp = ctx_buf->context;
2188         struct lpfc_hba *phba = ctxp->phba;
2189         struct rqb_dmabuf *nvmebuf = ctxp->rqb_buffer;
2190         struct lpfc_nvmet_tgtport *tgtp;
2191         uint32_t *payload, qno;
2192         uint32_t rc;
2193         unsigned long iflags;
2194
2195         if (!nvmebuf) {
2196                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2197                         "6159 process_rcv_fcp_req, nvmebuf is NULL, "
2198                         "oxid: x%x flg: x%x state: x%x\n",
2199                         ctxp->oxid, ctxp->flag, ctxp->state);
2200                 spin_lock_irqsave(&ctxp->ctxlock, iflags);
2201                 lpfc_nvmet_defer_release(phba, ctxp);
2202                 spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2203                 lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid,
2204                                                  ctxp->oxid);
2205                 return;
2206         }
2207
2208         if (ctxp->flag & LPFC_NVME_ABTS_RCV) {
2209                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2210                                 "6324 IO oxid x%x aborted\n",
2211                                 ctxp->oxid);
2212                 return;
2213         }
2214
2215         payload = (uint32_t *)(nvmebuf->dbuf.virt);
2216         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2217         ctxp->flag |= LPFC_NVME_TNOTIFY;
2218 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2219         if (ctxp->ts_isr_cmd)
2220                 ctxp->ts_cmd_nvme = ktime_get_ns();
2221 #endif
2222         /*
2223          * The calling sequence should be:
2224          * nvmet_fc_rcv_fcp_req->lpfc_nvmet_xmt_fcp_op/cmp- req->done
2225          * lpfc_nvmet_xmt_fcp_op_cmp should free the allocated ctxp.
2226          * When we return from nvmet_fc_rcv_fcp_req, all relevant info
2227          * the NVME command / FC header is stored.
2228          * A buffer has already been reposted for this IO, so just free
2229          * the nvmebuf.
2230          */
2231         rc = nvmet_fc_rcv_fcp_req(phba->targetport, &ctxp->hdlrctx.fcp_req,
2232                                   payload, ctxp->size);
2233         /* Process FCP command */
2234         if (rc == 0) {
2235                 atomic_inc(&tgtp->rcv_fcp_cmd_out);
2236                 spin_lock_irqsave(&ctxp->ctxlock, iflags);
2237                 if ((ctxp->flag & LPFC_NVME_CTX_REUSE_WQ) ||
2238                     (nvmebuf != ctxp->rqb_buffer)) {
2239                         spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2240                         return;
2241                 }
2242                 ctxp->rqb_buffer = NULL;
2243                 spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2244                 lpfc_rq_buf_free(phba, &nvmebuf->hbuf); /* repost */
2245                 return;
2246         }
2247
2248         /* Processing of FCP command is deferred */
2249         if (rc == -EOVERFLOW) {
2250                 lpfc_nvmeio_data(phba, "NVMET RCV BUSY: xri x%x sz %d "
2251                                  "from %06x\n",
2252                                  ctxp->oxid, ctxp->size, ctxp->sid);
2253                 atomic_inc(&tgtp->rcv_fcp_cmd_out);
2254                 atomic_inc(&tgtp->defer_fod);
2255                 spin_lock_irqsave(&ctxp->ctxlock, iflags);
2256                 if (ctxp->flag & LPFC_NVME_CTX_REUSE_WQ) {
2257                         spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2258                         return;
2259                 }
2260                 spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2261                 /*
2262                  * Post a replacement DMA buffer to RQ and defer
2263                  * freeing rcv buffer till .defer_rcv callback
2264                  */
2265                 qno = nvmebuf->idx;
2266                 lpfc_post_rq_buffer(
2267                         phba, phba->sli4_hba.nvmet_mrq_hdr[qno],
2268                         phba->sli4_hba.nvmet_mrq_data[qno], 1, qno);
2269                 return;
2270         }
2271         ctxp->flag &= ~LPFC_NVME_TNOTIFY;
2272         atomic_inc(&tgtp->rcv_fcp_cmd_drop);
2273         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2274                         "2582 FCP Drop IO x%x: err x%x: x%x x%x x%x\n",
2275                         ctxp->oxid, rc,
2276                         atomic_read(&tgtp->rcv_fcp_cmd_in),
2277                         atomic_read(&tgtp->rcv_fcp_cmd_out),
2278                         atomic_read(&tgtp->xmt_fcp_release));
2279         lpfc_nvmeio_data(phba, "NVMET FCP DROP: xri x%x sz %d from %06x\n",
2280                          ctxp->oxid, ctxp->size, ctxp->sid);
2281         spin_lock_irqsave(&ctxp->ctxlock, iflags);
2282         lpfc_nvmet_defer_release(phba, ctxp);
2283         spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2284         lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid, ctxp->oxid);
2285 #endif
2286 }
2287
2288 static void
2289 lpfc_nvmet_fcp_rqst_defer_work(struct work_struct *work)
2290 {
2291 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2292         struct lpfc_nvmet_ctxbuf *ctx_buf =
2293                 container_of(work, struct lpfc_nvmet_ctxbuf, defer_work);
2294
2295         lpfc_nvmet_process_rcv_fcp_req(ctx_buf);
2296 #endif
2297 }
2298
2299 static struct lpfc_nvmet_ctxbuf *
2300 lpfc_nvmet_replenish_context(struct lpfc_hba *phba,
2301                              struct lpfc_nvmet_ctx_info *current_infop)
2302 {
2303 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2304         struct lpfc_nvmet_ctxbuf *ctx_buf = NULL;
2305         struct lpfc_nvmet_ctx_info *get_infop;
2306         int i;
2307
2308         /*
2309          * The current_infop for the MRQ a NVME command IU was received
2310          * on is empty. Our goal is to replenish this MRQs context
2311          * list from a another CPUs.
2312          *
2313          * First we need to pick a context list to start looking on.
2314          * nvmet_ctx_start_cpu has available context the last time
2315          * we needed to replenish this CPU where nvmet_ctx_next_cpu
2316          * is just the next sequential CPU for this MRQ.
2317          */
2318         if (current_infop->nvmet_ctx_start_cpu)
2319                 get_infop = current_infop->nvmet_ctx_start_cpu;
2320         else
2321                 get_infop = current_infop->nvmet_ctx_next_cpu;
2322
2323         for (i = 0; i < phba->sli4_hba.num_possible_cpu; i++) {
2324                 if (get_infop == current_infop) {
2325                         get_infop = get_infop->nvmet_ctx_next_cpu;
2326                         continue;
2327                 }
2328                 spin_lock(&get_infop->nvmet_ctx_list_lock);
2329
2330                 /* Just take the entire context list, if there are any */
2331                 if (get_infop->nvmet_ctx_list_cnt) {
2332                         list_splice_init(&get_infop->nvmet_ctx_list,
2333                                     &current_infop->nvmet_ctx_list);
2334                         current_infop->nvmet_ctx_list_cnt =
2335                                 get_infop->nvmet_ctx_list_cnt - 1;
2336                         get_infop->nvmet_ctx_list_cnt = 0;
2337                         spin_unlock(&get_infop->nvmet_ctx_list_lock);
2338
2339                         current_infop->nvmet_ctx_start_cpu = get_infop;
2340                         list_remove_head(&current_infop->nvmet_ctx_list,
2341                                          ctx_buf, struct lpfc_nvmet_ctxbuf,
2342                                          list);
2343                         return ctx_buf;
2344                 }
2345
2346                 /* Otherwise, move on to the next CPU for this MRQ */
2347                 spin_unlock(&get_infop->nvmet_ctx_list_lock);
2348                 get_infop = get_infop->nvmet_ctx_next_cpu;
2349         }
2350
2351 #endif
2352         /* Nothing found, all contexts for the MRQ are in-flight */
2353         return NULL;
2354 }
2355
2356 /**
2357  * lpfc_nvmet_unsol_fcp_buffer - Process an unsolicited event data buffer
2358  * @phba: pointer to lpfc hba data structure.
2359  * @idx: relative index of MRQ vector
2360  * @nvmebuf: pointer to lpfc nvme command HBQ data structure.
2361  * @isr_timestamp: in jiffies.
2362  * @cqflag: cq processing information regarding workload.
2363  *
2364  * This routine is used for processing the WQE associated with a unsolicited
2365  * event. It first determines whether there is an existing ndlp that matches
2366  * the DID from the unsolicited WQE. If not, it will create a new one with
2367  * the DID from the unsolicited WQE. The ELS command from the unsolicited
2368  * WQE is then used to invoke the proper routine and to set up proper state
2369  * of the discovery state machine.
2370  **/
2371 static void
2372 lpfc_nvmet_unsol_fcp_buffer(struct lpfc_hba *phba,
2373                             uint32_t idx,
2374                             struct rqb_dmabuf *nvmebuf,
2375                             uint64_t isr_timestamp,
2376                             uint8_t cqflag)
2377 {
2378         struct lpfc_async_xchg_ctx *ctxp;
2379         struct lpfc_nvmet_tgtport *tgtp;
2380         struct fc_frame_header *fc_hdr;
2381         struct lpfc_nvmet_ctxbuf *ctx_buf;
2382         struct lpfc_nvmet_ctx_info *current_infop;
2383         uint32_t size, oxid, sid, qno;
2384         unsigned long iflag;
2385         int current_cpu;
2386
2387         if (!IS_ENABLED(CONFIG_NVME_TARGET_FC))
2388                 return;
2389
2390         ctx_buf = NULL;
2391         if (!nvmebuf || !phba->targetport) {
2392                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2393                                 "6157 NVMET FCP Drop IO\n");
2394                 if (nvmebuf)
2395                         lpfc_rq_buf_free(phba, &nvmebuf->hbuf);
2396                 return;
2397         }
2398
2399         /*
2400          * Get a pointer to the context list for this MRQ based on
2401          * the CPU this MRQ IRQ is associated with. If the CPU association
2402          * changes from our initial assumption, the context list could
2403          * be empty, thus it would need to be replenished with the
2404          * context list from another CPU for this MRQ.
2405          */
2406         current_cpu = raw_smp_processor_id();
2407         current_infop = lpfc_get_ctx_list(phba, current_cpu, idx);
2408         spin_lock_irqsave(&current_infop->nvmet_ctx_list_lock, iflag);
2409         if (current_infop->nvmet_ctx_list_cnt) {
2410                 list_remove_head(&current_infop->nvmet_ctx_list,
2411                                  ctx_buf, struct lpfc_nvmet_ctxbuf, list);
2412                 current_infop->nvmet_ctx_list_cnt--;
2413         } else {
2414                 ctx_buf = lpfc_nvmet_replenish_context(phba, current_infop);
2415         }
2416         spin_unlock_irqrestore(&current_infop->nvmet_ctx_list_lock, iflag);
2417
2418         fc_hdr = (struct fc_frame_header *)(nvmebuf->hbuf.virt);
2419         oxid = be16_to_cpu(fc_hdr->fh_ox_id);
2420         size = nvmebuf->bytes_recv;
2421
2422 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2423         if (phba->hdwqstat_on & LPFC_CHECK_NVMET_IO) {
2424                 this_cpu_inc(phba->sli4_hba.c_stat->rcv_io);
2425                 if (idx != current_cpu)
2426                         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
2427                                         "6703 CPU Check rcv: "
2428                                         "cpu %d expect %d\n",
2429                                         current_cpu, idx);
2430         }
2431 #endif
2432
2433         lpfc_nvmeio_data(phba, "NVMET FCP  RCV: xri x%x sz %d CPU %02x\n",
2434                          oxid, size, raw_smp_processor_id());
2435
2436         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2437
2438         if (!ctx_buf) {
2439                 /* Queue this NVME IO to process later */
2440                 spin_lock_irqsave(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
2441                 list_add_tail(&nvmebuf->hbuf.list,
2442                               &phba->sli4_hba.lpfc_nvmet_io_wait_list);
2443                 phba->sli4_hba.nvmet_io_wait_cnt++;
2444                 phba->sli4_hba.nvmet_io_wait_total++;
2445                 spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock,
2446                                        iflag);
2447
2448                 /* Post a brand new DMA buffer to RQ */
2449                 qno = nvmebuf->idx;
2450                 lpfc_post_rq_buffer(
2451                         phba, phba->sli4_hba.nvmet_mrq_hdr[qno],
2452                         phba->sli4_hba.nvmet_mrq_data[qno], 1, qno);
2453
2454                 atomic_inc(&tgtp->defer_ctx);
2455                 return;
2456         }
2457
2458         sid = sli4_sid_from_fc_hdr(fc_hdr);
2459
2460         ctxp = (struct lpfc_async_xchg_ctx *)ctx_buf->context;
2461         spin_lock_irqsave(&phba->sli4_hba.t_active_list_lock, iflag);
2462         list_add_tail(&ctxp->list, &phba->sli4_hba.t_active_ctx_list);
2463         spin_unlock_irqrestore(&phba->sli4_hba.t_active_list_lock, iflag);
2464         if (ctxp->state != LPFC_NVME_STE_FREE) {
2465                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2466                                 "6414 NVMET Context corrupt %d %d oxid x%x\n",
2467                                 ctxp->state, ctxp->entry_cnt, ctxp->oxid);
2468         }
2469         ctxp->wqeq = NULL;
2470         ctxp->offset = 0;
2471         ctxp->phba = phba;
2472         ctxp->size = size;
2473         ctxp->oxid = oxid;
2474         ctxp->sid = sid;
2475         ctxp->idx = idx;
2476         ctxp->state = LPFC_NVME_STE_RCV;
2477         ctxp->entry_cnt = 1;
2478         ctxp->flag = 0;
2479         ctxp->ctxbuf = ctx_buf;
2480         ctxp->rqb_buffer = (void *)nvmebuf;
2481         ctxp->hdwq = NULL;
2482         spin_lock_init(&ctxp->ctxlock);
2483
2484 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2485         if (isr_timestamp)
2486                 ctxp->ts_isr_cmd = isr_timestamp;
2487         ctxp->ts_cmd_nvme = 0;
2488         ctxp->ts_nvme_data = 0;
2489         ctxp->ts_data_wqput = 0;
2490         ctxp->ts_isr_data = 0;
2491         ctxp->ts_data_nvme = 0;
2492         ctxp->ts_nvme_status = 0;
2493         ctxp->ts_status_wqput = 0;
2494         ctxp->ts_isr_status = 0;
2495         ctxp->ts_status_nvme = 0;
2496 #endif
2497
2498         atomic_inc(&tgtp->rcv_fcp_cmd_in);
2499         /* check for cq processing load */
2500         if (!cqflag) {
2501                 lpfc_nvmet_process_rcv_fcp_req(ctx_buf);
2502                 return;
2503         }
2504
2505         if (!queue_work(phba->wq, &ctx_buf->defer_work)) {
2506                 atomic_inc(&tgtp->rcv_fcp_cmd_drop);
2507                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2508                                 "6325 Unable to queue work for oxid x%x. "
2509                                 "FCP Drop IO [x%x x%x x%x]\n",
2510                                 ctxp->oxid,
2511                                 atomic_read(&tgtp->rcv_fcp_cmd_in),
2512                                 atomic_read(&tgtp->rcv_fcp_cmd_out),
2513                                 atomic_read(&tgtp->xmt_fcp_release));
2514
2515                 spin_lock_irqsave(&ctxp->ctxlock, iflag);
2516                 lpfc_nvmet_defer_release(phba, ctxp);
2517                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
2518                 lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, sid, oxid);
2519         }
2520 }
2521
2522 /**
2523  * lpfc_nvmet_unsol_fcp_event - Process an unsolicited event from an nvme nport
2524  * @phba: pointer to lpfc hba data structure.
2525  * @idx: relative index of MRQ vector
2526  * @nvmebuf: pointer to received nvme data structure.
2527  * @isr_timestamp: in jiffies.
2528  * @cqflag: cq processing information regarding workload.
2529  *
2530  * This routine is used to process an unsolicited event received from a SLI
2531  * (Service Level Interface) ring. The actual processing of the data buffer
2532  * associated with the unsolicited event is done by invoking the routine
2533  * lpfc_nvmet_unsol_fcp_buffer() after properly set up the buffer from the
2534  * SLI RQ on which the unsolicited event was received.
2535  **/
2536 void
2537 lpfc_nvmet_unsol_fcp_event(struct lpfc_hba *phba,
2538                            uint32_t idx,
2539                            struct rqb_dmabuf *nvmebuf,
2540                            uint64_t isr_timestamp,
2541                            uint8_t cqflag)
2542 {
2543         if (!nvmebuf) {
2544                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2545                                 "3167 NVMET FCP Drop IO\n");
2546                 return;
2547         }
2548         if (phba->nvmet_support == 0) {
2549                 lpfc_rq_buf_free(phba, &nvmebuf->hbuf);
2550                 return;
2551         }
2552         lpfc_nvmet_unsol_fcp_buffer(phba, idx, nvmebuf, isr_timestamp, cqflag);
2553 }
2554
2555 /**
2556  * lpfc_nvmet_prep_ls_wqe - Allocate and prepare a lpfc wqe data structure
2557  * @phba: pointer to a host N_Port data structure.
2558  * @ctxp: Context info for NVME LS Request
2559  * @rspbuf: DMA buffer of NVME command.
2560  * @rspsize: size of the NVME command.
2561  *
2562  * This routine is used for allocating a lpfc-WQE data structure from
2563  * the driver lpfc-WQE free-list and prepare the WQE with the parameters
2564  * passed into the routine for discovery state machine to issue an Extended
2565  * Link Service (NVME) commands. It is a generic lpfc-WQE allocation
2566  * and preparation routine that is used by all the discovery state machine
2567  * routines and the NVME command-specific fields will be later set up by
2568  * the individual discovery machine routines after calling this routine
2569  * allocating and preparing a generic WQE data structure. It fills in the
2570  * Buffer Descriptor Entries (BDEs), allocates buffers for both command
2571  * payload and response payload (if expected). The reference count on the
2572  * ndlp is incremented by 1 and the reference to the ndlp is put into
2573  * context1 of the WQE data structure for this WQE to hold the ndlp
2574  * reference for the command's callback function to access later.
2575  *
2576  * Return code
2577  *   Pointer to the newly allocated/prepared nvme wqe data structure
2578  *   NULL - when nvme wqe data structure allocation/preparation failed
2579  **/
2580 static struct lpfc_iocbq *
2581 lpfc_nvmet_prep_ls_wqe(struct lpfc_hba *phba,
2582                        struct lpfc_async_xchg_ctx *ctxp,
2583                        dma_addr_t rspbuf, uint16_t rspsize)
2584 {
2585         struct lpfc_nodelist *ndlp;
2586         struct lpfc_iocbq *nvmewqe;
2587         union lpfc_wqe128 *wqe;
2588
2589         if (!lpfc_is_link_up(phba)) {
2590                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2591                                 "6104 NVMET prep LS wqe: link err: "
2592                                 "NPORT x%x oxid:x%x ste %d\n",
2593                                 ctxp->sid, ctxp->oxid, ctxp->state);
2594                 return NULL;
2595         }
2596
2597         /* Allocate buffer for  command wqe */
2598         nvmewqe = lpfc_sli_get_iocbq(phba);
2599         if (nvmewqe == NULL) {
2600                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2601                                 "6105 NVMET prep LS wqe: No WQE: "
2602                                 "NPORT x%x oxid x%x ste %d\n",
2603                                 ctxp->sid, ctxp->oxid, ctxp->state);
2604                 return NULL;
2605         }
2606
2607         ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
2608         if (!ndlp ||
2609             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
2610             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
2611                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2612                                 "6106 NVMET prep LS wqe: No ndlp: "
2613                                 "NPORT x%x oxid x%x ste %d\n",
2614                                 ctxp->sid, ctxp->oxid, ctxp->state);
2615                 goto nvme_wqe_free_wqeq_exit;
2616         }
2617         ctxp->wqeq = nvmewqe;
2618
2619         /* prevent preparing wqe with NULL ndlp reference */
2620         nvmewqe->ndlp = lpfc_nlp_get(ndlp);
2621         if (!nvmewqe->ndlp)
2622                 goto nvme_wqe_free_wqeq_exit;
2623         nvmewqe->context_un.axchg = ctxp;
2624
2625         wqe = &nvmewqe->wqe;
2626         memset(wqe, 0, sizeof(union lpfc_wqe));
2627
2628         /* Words 0 - 2 */
2629         wqe->xmit_sequence.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2630         wqe->xmit_sequence.bde.tus.f.bdeSize = rspsize;
2631         wqe->xmit_sequence.bde.addrLow = le32_to_cpu(putPaddrLow(rspbuf));
2632         wqe->xmit_sequence.bde.addrHigh = le32_to_cpu(putPaddrHigh(rspbuf));
2633
2634         /* Word 3 */
2635
2636         /* Word 4 */
2637
2638         /* Word 5 */
2639         bf_set(wqe_dfctl, &wqe->xmit_sequence.wge_ctl, 0);
2640         bf_set(wqe_ls, &wqe->xmit_sequence.wge_ctl, 1);
2641         bf_set(wqe_la, &wqe->xmit_sequence.wge_ctl, 0);
2642         bf_set(wqe_rctl, &wqe->xmit_sequence.wge_ctl, FC_RCTL_ELS4_REP);
2643         bf_set(wqe_type, &wqe->xmit_sequence.wge_ctl, FC_TYPE_NVME);
2644
2645         /* Word 6 */
2646         bf_set(wqe_ctxt_tag, &wqe->xmit_sequence.wqe_com,
2647                phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2648         bf_set(wqe_xri_tag, &wqe->xmit_sequence.wqe_com, nvmewqe->sli4_xritag);
2649
2650         /* Word 7 */
2651         bf_set(wqe_cmnd, &wqe->xmit_sequence.wqe_com,
2652                CMD_XMIT_SEQUENCE64_WQE);
2653         bf_set(wqe_ct, &wqe->xmit_sequence.wqe_com, SLI4_CT_RPI);
2654         bf_set(wqe_class, &wqe->xmit_sequence.wqe_com, CLASS3);
2655         bf_set(wqe_pu, &wqe->xmit_sequence.wqe_com, 0);
2656
2657         /* Word 8 */
2658         wqe->xmit_sequence.wqe_com.abort_tag = nvmewqe->iotag;
2659
2660         /* Word 9 */
2661         bf_set(wqe_reqtag, &wqe->xmit_sequence.wqe_com, nvmewqe->iotag);
2662         /* Needs to be set by caller */
2663         bf_set(wqe_rcvoxid, &wqe->xmit_sequence.wqe_com, ctxp->oxid);
2664
2665         /* Word 10 */
2666         bf_set(wqe_dbde, &wqe->xmit_sequence.wqe_com, 1);
2667         bf_set(wqe_iod, &wqe->xmit_sequence.wqe_com, LPFC_WQE_IOD_WRITE);
2668         bf_set(wqe_lenloc, &wqe->xmit_sequence.wqe_com,
2669                LPFC_WQE_LENLOC_WORD12);
2670         bf_set(wqe_ebde_cnt, &wqe->xmit_sequence.wqe_com, 0);
2671
2672         /* Word 11 */
2673         bf_set(wqe_cqid, &wqe->xmit_sequence.wqe_com,
2674                LPFC_WQE_CQ_ID_DEFAULT);
2675         bf_set(wqe_cmd_type, &wqe->xmit_sequence.wqe_com,
2676                OTHER_COMMAND);
2677
2678         /* Word 12 */
2679         wqe->xmit_sequence.xmit_len = rspsize;
2680
2681         nvmewqe->retry = 1;
2682         nvmewqe->vport = phba->pport;
2683         nvmewqe->drvrTimeout = (phba->fc_ratov * 3) + LPFC_DRVR_TIMEOUT;
2684         nvmewqe->cmd_flag |= LPFC_IO_NVME_LS;
2685
2686         /* Xmit NVMET response to remote NPORT <did> */
2687         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
2688                         "6039 Xmit NVMET LS response to remote "
2689                         "NPORT x%x iotag:x%x oxid:x%x size:x%x\n",
2690                         ndlp->nlp_DID, nvmewqe->iotag, ctxp->oxid,
2691                         rspsize);
2692         return nvmewqe;
2693
2694 nvme_wqe_free_wqeq_exit:
2695         nvmewqe->context_un.axchg = NULL;
2696         nvmewqe->ndlp = NULL;
2697         nvmewqe->bpl_dmabuf = NULL;
2698         lpfc_sli_release_iocbq(phba, nvmewqe);
2699         return NULL;
2700 }
2701
2702
2703 static struct lpfc_iocbq *
2704 lpfc_nvmet_prep_fcp_wqe(struct lpfc_hba *phba,
2705                         struct lpfc_async_xchg_ctx *ctxp)
2706 {
2707         struct nvmefc_tgt_fcp_req *rsp = &ctxp->hdlrctx.fcp_req;
2708         struct lpfc_nvmet_tgtport *tgtp;
2709         struct sli4_sge *sgl;
2710         struct lpfc_nodelist *ndlp;
2711         struct lpfc_iocbq *nvmewqe;
2712         struct scatterlist *sgel;
2713         union lpfc_wqe128 *wqe;
2714         struct ulp_bde64 *bde;
2715         dma_addr_t physaddr;
2716         int i, cnt, nsegs;
2717         bool use_pbde = false;
2718         int xc = 1;
2719
2720         if (!lpfc_is_link_up(phba)) {
2721                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2722                                 "6107 NVMET prep FCP wqe: link err:"
2723                                 "NPORT x%x oxid x%x ste %d\n",
2724                                 ctxp->sid, ctxp->oxid, ctxp->state);
2725                 return NULL;
2726         }
2727
2728         ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
2729         if (!ndlp ||
2730             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
2731              (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
2732                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2733                                 "6108 NVMET prep FCP wqe: no ndlp: "
2734                                 "NPORT x%x oxid x%x ste %d\n",
2735                                 ctxp->sid, ctxp->oxid, ctxp->state);
2736                 return NULL;
2737         }
2738
2739         if (rsp->sg_cnt > lpfc_tgttemplate.max_sgl_segments) {
2740                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2741                                 "6109 NVMET prep FCP wqe: seg cnt err: "
2742                                 "NPORT x%x oxid x%x ste %d cnt %d\n",
2743                                 ctxp->sid, ctxp->oxid, ctxp->state,
2744                                 phba->cfg_nvme_seg_cnt);
2745                 return NULL;
2746         }
2747         nsegs = rsp->sg_cnt;
2748
2749         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2750         nvmewqe = ctxp->wqeq;
2751         if (nvmewqe == NULL) {
2752                 /* Allocate buffer for  command wqe */
2753                 nvmewqe = ctxp->ctxbuf->iocbq;
2754                 if (nvmewqe == NULL) {
2755                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2756                                         "6110 NVMET prep FCP wqe: No "
2757                                         "WQE: NPORT x%x oxid x%x ste %d\n",
2758                                         ctxp->sid, ctxp->oxid, ctxp->state);
2759                         return NULL;
2760                 }
2761                 ctxp->wqeq = nvmewqe;
2762                 xc = 0; /* create new XRI */
2763                 nvmewqe->sli4_lxritag = NO_XRI;
2764                 nvmewqe->sli4_xritag = NO_XRI;
2765         }
2766
2767         /* Sanity check */
2768         if (((ctxp->state == LPFC_NVME_STE_RCV) &&
2769             (ctxp->entry_cnt == 1)) ||
2770             (ctxp->state == LPFC_NVME_STE_DATA)) {
2771                 wqe = &nvmewqe->wqe;
2772         } else {
2773                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2774                                 "6111 Wrong state NVMET FCP: %d  cnt %d\n",
2775                                 ctxp->state, ctxp->entry_cnt);
2776                 return NULL;
2777         }
2778
2779         sgl  = (struct sli4_sge *)ctxp->ctxbuf->sglq->sgl;
2780         switch (rsp->op) {
2781         case NVMET_FCOP_READDATA:
2782         case NVMET_FCOP_READDATA_RSP:
2783                 /* From the tsend template, initialize words 7 - 11 */
2784                 memcpy(&wqe->words[7],
2785                        &lpfc_tsend_cmd_template.words[7],
2786                        sizeof(uint32_t) * 5);
2787
2788                 /* Words 0 - 2 : The first sg segment */
2789                 sgel = &rsp->sg[0];
2790                 physaddr = sg_dma_address(sgel);
2791                 wqe->fcp_tsend.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2792                 wqe->fcp_tsend.bde.tus.f.bdeSize = sg_dma_len(sgel);
2793                 wqe->fcp_tsend.bde.addrLow = cpu_to_le32(putPaddrLow(physaddr));
2794                 wqe->fcp_tsend.bde.addrHigh =
2795                         cpu_to_le32(putPaddrHigh(physaddr));
2796
2797                 /* Word 3 */
2798                 wqe->fcp_tsend.payload_offset_len = 0;
2799
2800                 /* Word 4 */
2801                 wqe->fcp_tsend.relative_offset = ctxp->offset;
2802
2803                 /* Word 5 */
2804                 wqe->fcp_tsend.reserved = 0;
2805
2806                 /* Word 6 */
2807                 bf_set(wqe_ctxt_tag, &wqe->fcp_tsend.wqe_com,
2808                        phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2809                 bf_set(wqe_xri_tag, &wqe->fcp_tsend.wqe_com,
2810                        nvmewqe->sli4_xritag);
2811
2812                 /* Word 7 - set ar later */
2813
2814                 /* Word 8 */
2815                 wqe->fcp_tsend.wqe_com.abort_tag = nvmewqe->iotag;
2816
2817                 /* Word 9 */
2818                 bf_set(wqe_reqtag, &wqe->fcp_tsend.wqe_com, nvmewqe->iotag);
2819                 bf_set(wqe_rcvoxid, &wqe->fcp_tsend.wqe_com, ctxp->oxid);
2820
2821                 /* Word 10 - set wqes later, in template xc=1 */
2822                 if (!xc)
2823                         bf_set(wqe_xc, &wqe->fcp_tsend.wqe_com, 0);
2824
2825                 /* Word 12 */
2826                 wqe->fcp_tsend.fcp_data_len = rsp->transfer_length;
2827
2828                 /* Setup 2 SKIP SGEs */
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                 sgl->addr_hi = 0;
2837                 sgl->addr_lo = 0;
2838                 sgl->word2 = 0;
2839                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2840                 sgl->word2 = cpu_to_le32(sgl->word2);
2841                 sgl->sge_len = 0;
2842                 sgl++;
2843                 if (rsp->op == NVMET_FCOP_READDATA_RSP) {
2844                         atomic_inc(&tgtp->xmt_fcp_read_rsp);
2845
2846                         /* In template ar=1 wqes=0 sup=0 irsp=0 irsplen=0 */
2847
2848                         if (rsp->rsplen == LPFC_NVMET_SUCCESS_LEN) {
2849                                 if (ndlp->nlp_flag & NLP_SUPPRESS_RSP)
2850                                         bf_set(wqe_sup,
2851                                                &wqe->fcp_tsend.wqe_com, 1);
2852                         } else {
2853                                 bf_set(wqe_wqes, &wqe->fcp_tsend.wqe_com, 1);
2854                                 bf_set(wqe_irsp, &wqe->fcp_tsend.wqe_com, 1);
2855                                 bf_set(wqe_irsplen, &wqe->fcp_tsend.wqe_com,
2856                                        ((rsp->rsplen >> 2) - 1));
2857                                 memcpy(&wqe->words[16], rsp->rspaddr,
2858                                        rsp->rsplen);
2859                         }
2860                 } else {
2861                         atomic_inc(&tgtp->xmt_fcp_read);
2862
2863                         /* In template ar=1 wqes=0 sup=0 irsp=0 irsplen=0 */
2864                         bf_set(wqe_ar, &wqe->fcp_tsend.wqe_com, 0);
2865                 }
2866                 break;
2867
2868         case NVMET_FCOP_WRITEDATA:
2869                 /* From the treceive template, initialize words 3 - 11 */
2870                 memcpy(&wqe->words[3],
2871                        &lpfc_treceive_cmd_template.words[3],
2872                        sizeof(uint32_t) * 9);
2873
2874                 /* Words 0 - 2 : First SGE is skipped, set invalid BDE type */
2875                 wqe->fcp_treceive.bde.tus.f.bdeFlags = LPFC_SGE_TYPE_SKIP;
2876                 wqe->fcp_treceive.bde.tus.f.bdeSize = 0;
2877                 wqe->fcp_treceive.bde.addrLow = 0;
2878                 wqe->fcp_treceive.bde.addrHigh = 0;
2879
2880                 /* Word 4 */
2881                 wqe->fcp_treceive.relative_offset = ctxp->offset;
2882
2883                 /* Word 6 */
2884                 bf_set(wqe_ctxt_tag, &wqe->fcp_treceive.wqe_com,
2885                        phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2886                 bf_set(wqe_xri_tag, &wqe->fcp_treceive.wqe_com,
2887                        nvmewqe->sli4_xritag);
2888
2889                 /* Word 7 */
2890
2891                 /* Word 8 */
2892                 wqe->fcp_treceive.wqe_com.abort_tag = nvmewqe->iotag;
2893
2894                 /* Word 9 */
2895                 bf_set(wqe_reqtag, &wqe->fcp_treceive.wqe_com, nvmewqe->iotag);
2896                 bf_set(wqe_rcvoxid, &wqe->fcp_treceive.wqe_com, ctxp->oxid);
2897
2898                 /* Word 10 - in template xc=1 */
2899                 if (!xc)
2900                         bf_set(wqe_xc, &wqe->fcp_treceive.wqe_com, 0);
2901
2902                 /* Word 11 - check for pbde */
2903                 if (nsegs == 1 && phba->cfg_enable_pbde) {
2904                         use_pbde = true;
2905                         /* Word 11 - PBDE bit already preset by template */
2906                 } else {
2907                         /* Overwrite default template setting */
2908                         bf_set(wqe_pbde, &wqe->fcp_treceive.wqe_com, 0);
2909                 }
2910
2911                 /* Word 12 */
2912                 wqe->fcp_tsend.fcp_data_len = rsp->transfer_length;
2913
2914                 /* Setup 2 SKIP SGEs */
2915                 sgl->addr_hi = 0;
2916                 sgl->addr_lo = 0;
2917                 sgl->word2 = 0;
2918                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2919                 sgl->word2 = cpu_to_le32(sgl->word2);
2920                 sgl->sge_len = 0;
2921                 sgl++;
2922                 sgl->addr_hi = 0;
2923                 sgl->addr_lo = 0;
2924                 sgl->word2 = 0;
2925                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2926                 sgl->word2 = cpu_to_le32(sgl->word2);
2927                 sgl->sge_len = 0;
2928                 sgl++;
2929                 atomic_inc(&tgtp->xmt_fcp_write);
2930                 break;
2931
2932         case NVMET_FCOP_RSP:
2933                 /* From the treceive template, initialize words 4 - 11 */
2934                 memcpy(&wqe->words[4],
2935                        &lpfc_trsp_cmd_template.words[4],
2936                        sizeof(uint32_t) * 8);
2937
2938                 /* Words 0 - 2 */
2939                 physaddr = rsp->rspdma;
2940                 wqe->fcp_trsp.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2941                 wqe->fcp_trsp.bde.tus.f.bdeSize = rsp->rsplen;
2942                 wqe->fcp_trsp.bde.addrLow =
2943                         cpu_to_le32(putPaddrLow(physaddr));
2944                 wqe->fcp_trsp.bde.addrHigh =
2945                         cpu_to_le32(putPaddrHigh(physaddr));
2946
2947                 /* Word 3 */
2948                 wqe->fcp_trsp.response_len = rsp->rsplen;
2949
2950                 /* Word 6 */
2951                 bf_set(wqe_ctxt_tag, &wqe->fcp_trsp.wqe_com,
2952                        phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2953                 bf_set(wqe_xri_tag, &wqe->fcp_trsp.wqe_com,
2954                        nvmewqe->sli4_xritag);
2955
2956                 /* Word 7 */
2957
2958                 /* Word 8 */
2959                 wqe->fcp_trsp.wqe_com.abort_tag = nvmewqe->iotag;
2960
2961                 /* Word 9 */
2962                 bf_set(wqe_reqtag, &wqe->fcp_trsp.wqe_com, nvmewqe->iotag);
2963                 bf_set(wqe_rcvoxid, &wqe->fcp_trsp.wqe_com, ctxp->oxid);
2964
2965                 /* Word 10 */
2966                 if (xc)
2967                         bf_set(wqe_xc, &wqe->fcp_trsp.wqe_com, 1);
2968
2969                 /* Word 11 */
2970                 /* In template wqes=0 irsp=0 irsplen=0 - good response */
2971                 if (rsp->rsplen != LPFC_NVMET_SUCCESS_LEN) {
2972                         /* Bad response - embed it */
2973                         bf_set(wqe_wqes, &wqe->fcp_trsp.wqe_com, 1);
2974                         bf_set(wqe_irsp, &wqe->fcp_trsp.wqe_com, 1);
2975                         bf_set(wqe_irsplen, &wqe->fcp_trsp.wqe_com,
2976                                ((rsp->rsplen >> 2) - 1));
2977                         memcpy(&wqe->words[16], rsp->rspaddr, rsp->rsplen);
2978                 }
2979
2980                 /* Word 12 */
2981                 wqe->fcp_trsp.rsvd_12_15[0] = 0;
2982
2983                 /* Use rspbuf, NOT sg list */
2984                 nsegs = 0;
2985                 sgl->word2 = 0;
2986                 atomic_inc(&tgtp->xmt_fcp_rsp);
2987                 break;
2988
2989         default:
2990                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
2991                                 "6064 Unknown Rsp Op %d\n",
2992                                 rsp->op);
2993                 return NULL;
2994         }
2995
2996         nvmewqe->retry = 1;
2997         nvmewqe->vport = phba->pport;
2998         nvmewqe->drvrTimeout = (phba->fc_ratov * 3) + LPFC_DRVR_TIMEOUT;
2999         nvmewqe->ndlp = ndlp;
3000
3001         for_each_sg(rsp->sg, sgel, nsegs, i) {
3002                 physaddr = sg_dma_address(sgel);
3003                 cnt = sg_dma_len(sgel);
3004                 sgl->addr_hi = putPaddrHigh(physaddr);
3005                 sgl->addr_lo = putPaddrLow(physaddr);
3006                 sgl->word2 = 0;
3007                 bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
3008                 bf_set(lpfc_sli4_sge_offset, sgl, ctxp->offset);
3009                 if ((i+1) == rsp->sg_cnt)
3010                         bf_set(lpfc_sli4_sge_last, sgl, 1);
3011                 sgl->word2 = cpu_to_le32(sgl->word2);
3012                 sgl->sge_len = cpu_to_le32(cnt);
3013                 sgl++;
3014                 ctxp->offset += cnt;
3015         }
3016
3017         bde = (struct ulp_bde64 *)&wqe->words[13];
3018         if (use_pbde) {
3019                 /* decrement sgl ptr backwards once to first data sge */
3020                 sgl--;
3021
3022                 /* Words 13-15 (PBDE) */
3023                 bde->addrLow = sgl->addr_lo;
3024                 bde->addrHigh = sgl->addr_hi;
3025                 bde->tus.f.bdeSize = le32_to_cpu(sgl->sge_len);
3026                 bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
3027                 bde->tus.w = cpu_to_le32(bde->tus.w);
3028         } else {
3029                 memset(bde, 0, sizeof(struct ulp_bde64));
3030         }
3031         ctxp->state = LPFC_NVME_STE_DATA;
3032         ctxp->entry_cnt++;
3033         return nvmewqe;
3034 }
3035
3036 /**
3037  * lpfc_nvmet_sol_fcp_abort_cmp - Completion handler for ABTS
3038  * @phba: Pointer to HBA context object.
3039  * @cmdwqe: Pointer to driver command WQE object.
3040  * @rspwqe: Pointer to driver response WQE object.
3041  *
3042  * The function is called from SLI ring event handler with no
3043  * lock held. This function is the completion handler for NVME ABTS for FCP cmds
3044  * The function frees memory resources used for the NVME commands.
3045  **/
3046 static void
3047 lpfc_nvmet_sol_fcp_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3048                              struct lpfc_iocbq *rspwqe)
3049 {
3050         struct lpfc_async_xchg_ctx *ctxp;
3051         struct lpfc_nvmet_tgtport *tgtp;
3052         uint32_t result;
3053         unsigned long flags;
3054         bool released = false;
3055         struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
3056
3057         ctxp = cmdwqe->context_un.axchg;
3058         result = wcqe->parameter;
3059
3060         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3061         if (ctxp->flag & LPFC_NVME_ABORT_OP)
3062                 atomic_inc(&tgtp->xmt_fcp_abort_cmpl);
3063
3064         spin_lock_irqsave(&ctxp->ctxlock, flags);
3065         ctxp->state = LPFC_NVME_STE_DONE;
3066
3067         /* Check if we already received a free context call
3068          * and we have completed processing an abort situation.
3069          */
3070         if ((ctxp->flag & LPFC_NVME_CTX_RLS) &&
3071             !(ctxp->flag & LPFC_NVME_XBUSY)) {
3072                 spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3073                 list_del_init(&ctxp->list);
3074                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3075                 released = true;
3076         }
3077         ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3078         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3079         atomic_inc(&tgtp->xmt_abort_rsp);
3080
3081         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3082                         "6165 ABORT cmpl: oxid x%x flg x%x (%d) "
3083                         "WCQE: %08x %08x %08x %08x\n",
3084                         ctxp->oxid, ctxp->flag, released,
3085                         wcqe->word0, wcqe->total_data_placed,
3086                         result, wcqe->word3);
3087
3088         cmdwqe->rsp_dmabuf = NULL;
3089         cmdwqe->bpl_dmabuf = NULL;
3090         /*
3091          * if transport has released ctx, then can reuse it. Otherwise,
3092          * will be recycled by transport release call.
3093          */
3094         if (released)
3095                 lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
3096
3097         /* This is the iocbq for the abort, not the command */
3098         lpfc_sli_release_iocbq(phba, cmdwqe);
3099
3100         /* Since iaab/iaar are NOT set, there is no work left.
3101          * For LPFC_NVME_XBUSY, lpfc_sli4_nvmet_xri_aborted
3102          * should have been called already.
3103          */
3104 }
3105
3106 /**
3107  * lpfc_nvmet_unsol_fcp_abort_cmp - Completion handler for ABTS
3108  * @phba: Pointer to HBA context object.
3109  * @cmdwqe: Pointer to driver command WQE object.
3110  * @rspwqe: Pointer to driver response WQE object.
3111  *
3112  * The function is called from SLI ring event handler with no
3113  * lock held. This function is the completion handler for NVME ABTS for FCP cmds
3114  * The function frees memory resources used for the NVME commands.
3115  **/
3116 static void
3117 lpfc_nvmet_unsol_fcp_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3118                                struct lpfc_iocbq *rspwqe)
3119 {
3120         struct lpfc_async_xchg_ctx *ctxp;
3121         struct lpfc_nvmet_tgtport *tgtp;
3122         unsigned long flags;
3123         uint32_t result;
3124         bool released = false;
3125         struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
3126
3127         ctxp = cmdwqe->context_un.axchg;
3128         result = wcqe->parameter;
3129
3130         if (!ctxp) {
3131                 /* if context is clear, related io alrady complete */
3132                 lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3133                                 "6070 ABTS cmpl: WCQE: %08x %08x %08x %08x\n",
3134                                 wcqe->word0, wcqe->total_data_placed,
3135                                 result, wcqe->word3);
3136                 return;
3137         }
3138
3139         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3140         spin_lock_irqsave(&ctxp->ctxlock, flags);
3141         if (ctxp->flag & LPFC_NVME_ABORT_OP)
3142                 atomic_inc(&tgtp->xmt_fcp_abort_cmpl);
3143
3144         /* Sanity check */
3145         if (ctxp->state != LPFC_NVME_STE_ABORT) {
3146                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3147                                 "6112 ABTS Wrong state:%d oxid x%x\n",
3148                                 ctxp->state, ctxp->oxid);
3149         }
3150
3151         /* Check if we already received a free context call
3152          * and we have completed processing an abort situation.
3153          */
3154         ctxp->state = LPFC_NVME_STE_DONE;
3155         if ((ctxp->flag & LPFC_NVME_CTX_RLS) &&
3156             !(ctxp->flag & LPFC_NVME_XBUSY)) {
3157                 spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3158                 list_del_init(&ctxp->list);
3159                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3160                 released = true;
3161         }
3162         ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3163         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3164         atomic_inc(&tgtp->xmt_abort_rsp);
3165
3166         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3167                         "6316 ABTS cmpl oxid x%x flg x%x (%x) "
3168                         "WCQE: %08x %08x %08x %08x\n",
3169                         ctxp->oxid, ctxp->flag, released,
3170                         wcqe->word0, wcqe->total_data_placed,
3171                         result, wcqe->word3);
3172
3173         cmdwqe->rsp_dmabuf = NULL;
3174         cmdwqe->bpl_dmabuf = NULL;
3175         /*
3176          * if transport has released ctx, then can reuse it. Otherwise,
3177          * will be recycled by transport release call.
3178          */
3179         if (released)
3180                 lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
3181
3182         /* Since iaab/iaar are NOT set, there is no work left.
3183          * For LPFC_NVME_XBUSY, lpfc_sli4_nvmet_xri_aborted
3184          * should have been called already.
3185          */
3186 }
3187
3188 /**
3189  * lpfc_nvmet_xmt_ls_abort_cmp - Completion handler for ABTS
3190  * @phba: Pointer to HBA context object.
3191  * @cmdwqe: Pointer to driver command WQE object.
3192  * @rspwqe: Pointer to driver response WQE object.
3193  *
3194  * The function is called from SLI ring event handler with no
3195  * lock held. This function is the completion handler for NVME ABTS for LS cmds
3196  * The function frees memory resources used for the NVME commands.
3197  **/
3198 static void
3199 lpfc_nvmet_xmt_ls_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3200                             struct lpfc_iocbq *rspwqe)
3201 {
3202         struct lpfc_async_xchg_ctx *ctxp;
3203         struct lpfc_nvmet_tgtport *tgtp;
3204         uint32_t result;
3205         struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
3206
3207         ctxp = cmdwqe->context_un.axchg;
3208         result = wcqe->parameter;
3209
3210         if (phba->nvmet_support) {
3211                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3212                 atomic_inc(&tgtp->xmt_ls_abort_cmpl);
3213         }
3214
3215         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3216                         "6083 Abort cmpl: ctx x%px WCQE:%08x %08x %08x %08x\n",
3217                         ctxp, wcqe->word0, wcqe->total_data_placed,
3218                         result, wcqe->word3);
3219
3220         if (!ctxp) {
3221                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3222                                 "6415 NVMET LS Abort No ctx: WCQE: "
3223                                  "%08x %08x %08x %08x\n",
3224                                 wcqe->word0, wcqe->total_data_placed,
3225                                 result, wcqe->word3);
3226
3227                 lpfc_sli_release_iocbq(phba, cmdwqe);
3228                 return;
3229         }
3230
3231         if (ctxp->state != LPFC_NVME_STE_LS_ABORT) {
3232                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3233                                 "6416 NVMET LS abort cmpl state mismatch: "
3234                                 "oxid x%x: %d %d\n",
3235                                 ctxp->oxid, ctxp->state, ctxp->entry_cnt);
3236         }
3237
3238         cmdwqe->rsp_dmabuf = NULL;
3239         cmdwqe->bpl_dmabuf = NULL;
3240         lpfc_sli_release_iocbq(phba, cmdwqe);
3241         kfree(ctxp);
3242 }
3243
3244 static int
3245 lpfc_nvmet_unsol_issue_abort(struct lpfc_hba *phba,
3246                              struct lpfc_async_xchg_ctx *ctxp,
3247                              uint32_t sid, uint16_t xri)
3248 {
3249         struct lpfc_nvmet_tgtport *tgtp = NULL;
3250         struct lpfc_iocbq *abts_wqeq;
3251         union lpfc_wqe128 *wqe_abts;
3252         struct lpfc_nodelist *ndlp;
3253
3254         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3255                         "6067 ABTS: sid %x xri x%x/x%x\n",
3256                         sid, xri, ctxp->wqeq->sli4_xritag);
3257
3258         if (phba->nvmet_support && phba->targetport)
3259                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3260
3261         ndlp = lpfc_findnode_did(phba->pport, sid);
3262         if (!ndlp ||
3263             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
3264             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
3265                 if (tgtp)
3266                         atomic_inc(&tgtp->xmt_abort_rsp_error);
3267                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3268                                 "6134 Drop ABTS - wrong NDLP state x%x.\n",
3269                                 (ndlp) ? ndlp->nlp_state : NLP_STE_MAX_STATE);
3270
3271                 /* No failure to an ABTS request. */
3272                 return 0;
3273         }
3274
3275         abts_wqeq = ctxp->wqeq;
3276         wqe_abts = &abts_wqeq->wqe;
3277
3278         /*
3279          * Since we zero the whole WQE, we need to ensure we set the WQE fields
3280          * that were initialized in lpfc_sli4_nvmet_alloc.
3281          */
3282         memset(wqe_abts, 0, sizeof(union lpfc_wqe));
3283
3284         /* Word 5 */
3285         bf_set(wqe_dfctl, &wqe_abts->xmit_sequence.wge_ctl, 0);
3286         bf_set(wqe_ls, &wqe_abts->xmit_sequence.wge_ctl, 1);
3287         bf_set(wqe_la, &wqe_abts->xmit_sequence.wge_ctl, 0);
3288         bf_set(wqe_rctl, &wqe_abts->xmit_sequence.wge_ctl, FC_RCTL_BA_ABTS);
3289         bf_set(wqe_type, &wqe_abts->xmit_sequence.wge_ctl, FC_TYPE_BLS);
3290
3291         /* Word 6 */
3292         bf_set(wqe_ctxt_tag, &wqe_abts->xmit_sequence.wqe_com,
3293                phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
3294         bf_set(wqe_xri_tag, &wqe_abts->xmit_sequence.wqe_com,
3295                abts_wqeq->sli4_xritag);
3296
3297         /* Word 7 */
3298         bf_set(wqe_cmnd, &wqe_abts->xmit_sequence.wqe_com,
3299                CMD_XMIT_SEQUENCE64_WQE);
3300         bf_set(wqe_ct, &wqe_abts->xmit_sequence.wqe_com, SLI4_CT_RPI);
3301         bf_set(wqe_class, &wqe_abts->xmit_sequence.wqe_com, CLASS3);
3302         bf_set(wqe_pu, &wqe_abts->xmit_sequence.wqe_com, 0);
3303
3304         /* Word 8 */
3305         wqe_abts->xmit_sequence.wqe_com.abort_tag = abts_wqeq->iotag;
3306
3307         /* Word 9 */
3308         bf_set(wqe_reqtag, &wqe_abts->xmit_sequence.wqe_com, abts_wqeq->iotag);
3309         /* Needs to be set by caller */
3310         bf_set(wqe_rcvoxid, &wqe_abts->xmit_sequence.wqe_com, xri);
3311
3312         /* Word 10 */
3313         bf_set(wqe_iod, &wqe_abts->xmit_sequence.wqe_com, LPFC_WQE_IOD_WRITE);
3314         bf_set(wqe_lenloc, &wqe_abts->xmit_sequence.wqe_com,
3315                LPFC_WQE_LENLOC_WORD12);
3316         bf_set(wqe_ebde_cnt, &wqe_abts->xmit_sequence.wqe_com, 0);
3317         bf_set(wqe_qosd, &wqe_abts->xmit_sequence.wqe_com, 0);
3318
3319         /* Word 11 */
3320         bf_set(wqe_cqid, &wqe_abts->xmit_sequence.wqe_com,
3321                LPFC_WQE_CQ_ID_DEFAULT);
3322         bf_set(wqe_cmd_type, &wqe_abts->xmit_sequence.wqe_com,
3323                OTHER_COMMAND);
3324
3325         abts_wqeq->vport = phba->pport;
3326         abts_wqeq->ndlp = ndlp;
3327         abts_wqeq->context_un.axchg = ctxp;
3328         abts_wqeq->bpl_dmabuf = NULL;
3329         abts_wqeq->num_bdes = 0;
3330         /* hba_wqidx should already be setup from command we are aborting */
3331         abts_wqeq->iocb.ulpCommand = CMD_XMIT_SEQUENCE64_CR;
3332         abts_wqeq->iocb.ulpLe = 1;
3333
3334         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3335                         "6069 Issue ABTS to xri x%x reqtag x%x\n",
3336                         xri, abts_wqeq->iotag);
3337         return 1;
3338 }
3339
3340 /**
3341  * lpfc_nvmet_prep_abort_wqe - set up 'abort' work queue entry.
3342  * @pwqeq: Pointer to command iocb.
3343  * @xritag: Tag that  uniqely identifies the local exchange resource.
3344  * @opt: Option bits -
3345  *              bit 0 = inhibit sending abts on the link
3346  *
3347  * This function is called with hbalock held.
3348  **/
3349 static void
3350 lpfc_nvmet_prep_abort_wqe(struct lpfc_iocbq *pwqeq, u16 xritag, u8 opt)
3351 {
3352         union lpfc_wqe128 *wqe = &pwqeq->wqe;
3353
3354         /* WQEs are reused.  Clear stale data and set key fields to
3355          * zero like ia, iaab, iaar, xri_tag, and ctxt_tag.
3356          */
3357         memset(wqe, 0, sizeof(*wqe));
3358
3359         if (opt & INHIBIT_ABORT)
3360                 bf_set(abort_cmd_ia, &wqe->abort_cmd, 1);
3361         /* Abort specified xri tag, with the mask deliberately zeroed */
3362         bf_set(abort_cmd_criteria, &wqe->abort_cmd, T_XRI_TAG);
3363
3364         bf_set(wqe_cmnd, &wqe->abort_cmd.wqe_com, CMD_ABORT_XRI_CX);
3365
3366         /* Abort the I/O associated with this outstanding exchange ID. */
3367         wqe->abort_cmd.wqe_com.abort_tag = xritag;
3368
3369         /* iotag for the wqe completion. */
3370         bf_set(wqe_reqtag, &wqe->abort_cmd.wqe_com, pwqeq->iotag);
3371
3372         bf_set(wqe_qosd, &wqe->abort_cmd.wqe_com, 1);
3373         bf_set(wqe_lenloc, &wqe->abort_cmd.wqe_com, LPFC_WQE_LENLOC_NONE);
3374
3375         bf_set(wqe_cmd_type, &wqe->abort_cmd.wqe_com, OTHER_COMMAND);
3376         bf_set(wqe_wqec, &wqe->abort_cmd.wqe_com, 1);
3377         bf_set(wqe_cqid, &wqe->abort_cmd.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
3378 }
3379
3380 static int
3381 lpfc_nvmet_sol_fcp_issue_abort(struct lpfc_hba *phba,
3382                                struct lpfc_async_xchg_ctx *ctxp,
3383                                uint32_t sid, uint16_t xri)
3384 {
3385         struct lpfc_nvmet_tgtport *tgtp;
3386         struct lpfc_iocbq *abts_wqeq;
3387         struct lpfc_nodelist *ndlp;
3388         unsigned long flags;
3389         u8 opt;
3390         int rc;
3391
3392         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3393         if (!ctxp->wqeq) {
3394                 ctxp->wqeq = ctxp->ctxbuf->iocbq;
3395                 ctxp->wqeq->hba_wqidx = 0;
3396         }
3397
3398         ndlp = lpfc_findnode_did(phba->pport, sid);
3399         if (!ndlp ||
3400             ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
3401             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
3402                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3403                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3404                                 "6160 Drop ABORT - wrong NDLP state x%x.\n",
3405                                 (ndlp) ? ndlp->nlp_state : NLP_STE_MAX_STATE);
3406
3407                 /* No failure to an ABTS request. */
3408                 spin_lock_irqsave(&ctxp->ctxlock, flags);
3409                 ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3410                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3411                 return 0;
3412         }
3413
3414         /* Issue ABTS for this WQE based on iotag */
3415         ctxp->abort_wqeq = lpfc_sli_get_iocbq(phba);
3416         spin_lock_irqsave(&ctxp->ctxlock, flags);
3417         if (!ctxp->abort_wqeq) {
3418                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3419                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3420                                 "6161 ABORT failed: No wqeqs: "
3421                                 "xri: x%x\n", ctxp->oxid);
3422                 /* No failure to an ABTS request. */
3423                 ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3424                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3425                 return 0;
3426         }
3427         abts_wqeq = ctxp->abort_wqeq;
3428         ctxp->state = LPFC_NVME_STE_ABORT;
3429         opt = (ctxp->flag & LPFC_NVME_ABTS_RCV) ? INHIBIT_ABORT : 0;
3430         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3431
3432         /* Announce entry to new IO submit field. */
3433         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3434                         "6162 ABORT Request to rport DID x%06x "
3435                         "for xri x%x x%x\n",
3436                         ctxp->sid, ctxp->oxid, ctxp->wqeq->sli4_xritag);
3437
3438         /* If the hba is getting reset, this flag is set.  It is
3439          * cleared when the reset is complete and rings reestablished.
3440          */
3441         spin_lock_irqsave(&phba->hbalock, flags);
3442         /* driver queued commands are in process of being flushed */
3443         if (phba->hba_flag & HBA_IOQ_FLUSH) {
3444                 spin_unlock_irqrestore(&phba->hbalock, flags);
3445                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3446                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3447                                 "6163 Driver in reset cleanup - flushing "
3448                                 "NVME Req now. hba_flag x%x oxid x%x\n",
3449                                 phba->hba_flag, ctxp->oxid);
3450                 lpfc_sli_release_iocbq(phba, abts_wqeq);
3451                 spin_lock_irqsave(&ctxp->ctxlock, flags);
3452                 ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3453                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3454                 return 0;
3455         }
3456
3457         /* Outstanding abort is in progress */
3458         if (abts_wqeq->cmd_flag & LPFC_DRIVER_ABORTED) {
3459                 spin_unlock_irqrestore(&phba->hbalock, flags);
3460                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3461                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3462                                 "6164 Outstanding NVME I/O Abort Request "
3463                                 "still pending on oxid x%x\n",
3464                                 ctxp->oxid);
3465                 lpfc_sli_release_iocbq(phba, abts_wqeq);
3466                 spin_lock_irqsave(&ctxp->ctxlock, flags);
3467                 ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3468                 spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3469                 return 0;
3470         }
3471
3472         /* Ready - mark outstanding as aborted by driver. */
3473         abts_wqeq->cmd_flag |= LPFC_DRIVER_ABORTED;
3474
3475         lpfc_nvmet_prep_abort_wqe(abts_wqeq, ctxp->wqeq->sli4_xritag, opt);
3476
3477         /* ABTS WQE must go to the same WQ as the WQE to be aborted */
3478         abts_wqeq->hba_wqidx = ctxp->wqeq->hba_wqidx;
3479         abts_wqeq->cmd_cmpl = lpfc_nvmet_sol_fcp_abort_cmp;
3480         abts_wqeq->cmd_flag |= LPFC_IO_NVME;
3481         abts_wqeq->context_un.axchg = ctxp;
3482         abts_wqeq->vport = phba->pport;
3483         if (!ctxp->hdwq)
3484                 ctxp->hdwq = &phba->sli4_hba.hdwq[abts_wqeq->hba_wqidx];
3485
3486         rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, abts_wqeq);
3487         spin_unlock_irqrestore(&phba->hbalock, flags);
3488         if (rc == WQE_SUCCESS) {
3489                 atomic_inc(&tgtp->xmt_abort_sol);
3490                 return 0;
3491         }
3492
3493         atomic_inc(&tgtp->xmt_abort_rsp_error);
3494         spin_lock_irqsave(&ctxp->ctxlock, flags);
3495         ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3496         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3497         lpfc_sli_release_iocbq(phba, abts_wqeq);
3498         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3499                         "6166 Failed ABORT issue_wqe with status x%x "
3500                         "for oxid x%x.\n",
3501                         rc, ctxp->oxid);
3502         return 1;
3503 }
3504
3505 static int
3506 lpfc_nvmet_unsol_fcp_issue_abort(struct lpfc_hba *phba,
3507                                  struct lpfc_async_xchg_ctx *ctxp,
3508                                  uint32_t sid, uint16_t xri)
3509 {
3510         struct lpfc_nvmet_tgtport *tgtp;
3511         struct lpfc_iocbq *abts_wqeq;
3512         unsigned long flags;
3513         bool released = false;
3514         int rc;
3515
3516         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3517         if (!ctxp->wqeq) {
3518                 ctxp->wqeq = ctxp->ctxbuf->iocbq;
3519                 ctxp->wqeq->hba_wqidx = 0;
3520         }
3521
3522         if (ctxp->state == LPFC_NVME_STE_FREE) {
3523                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3524                                 "6417 NVMET ABORT ctx freed %d %d oxid x%x\n",
3525                                 ctxp->state, ctxp->entry_cnt, ctxp->oxid);
3526                 rc = WQE_BUSY;
3527                 goto aerr;
3528         }
3529         ctxp->state = LPFC_NVME_STE_ABORT;
3530         ctxp->entry_cnt++;
3531         rc = lpfc_nvmet_unsol_issue_abort(phba, ctxp, sid, xri);
3532         if (rc == 0)
3533                 goto aerr;
3534
3535         spin_lock_irqsave(&phba->hbalock, flags);
3536         abts_wqeq = ctxp->wqeq;
3537         abts_wqeq->cmd_cmpl = lpfc_nvmet_unsol_fcp_abort_cmp;
3538         abts_wqeq->cmd_flag |= LPFC_IO_NVMET;
3539         if (!ctxp->hdwq)
3540                 ctxp->hdwq = &phba->sli4_hba.hdwq[abts_wqeq->hba_wqidx];
3541
3542         rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, abts_wqeq);
3543         spin_unlock_irqrestore(&phba->hbalock, flags);
3544         if (rc == WQE_SUCCESS) {
3545                 return 0;
3546         }
3547
3548 aerr:
3549         spin_lock_irqsave(&ctxp->ctxlock, flags);
3550         if (ctxp->flag & LPFC_NVME_CTX_RLS) {
3551                 spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3552                 list_del_init(&ctxp->list);
3553                 spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3554                 released = true;
3555         }
3556         ctxp->flag &= ~(LPFC_NVME_ABORT_OP | LPFC_NVME_CTX_RLS);
3557         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3558
3559         atomic_inc(&tgtp->xmt_abort_rsp_error);
3560         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3561                         "6135 Failed to Issue ABTS for oxid x%x. Status x%x "
3562                         "(%x)\n",
3563                         ctxp->oxid, rc, released);
3564         if (released)
3565                 lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
3566         return 1;
3567 }
3568
3569 /**
3570  * lpfc_nvme_unsol_ls_issue_abort - issue ABTS on an exchange received
3571  *        via async frame receive where the frame is not handled.
3572  * @phba: pointer to adapter structure
3573  * @ctxp: pointer to the asynchronously received received sequence
3574  * @sid: address of the remote port to send the ABTS to
3575  * @xri: oxid value to for the ABTS (other side's exchange id).
3576  **/
3577 int
3578 lpfc_nvme_unsol_ls_issue_abort(struct lpfc_hba *phba,
3579                                 struct lpfc_async_xchg_ctx *ctxp,
3580                                 uint32_t sid, uint16_t xri)
3581 {
3582         struct lpfc_nvmet_tgtport *tgtp = NULL;
3583         struct lpfc_iocbq *abts_wqeq;
3584         unsigned long flags;
3585         int rc;
3586
3587         if ((ctxp->state == LPFC_NVME_STE_LS_RCV && ctxp->entry_cnt == 1) ||
3588             (ctxp->state == LPFC_NVME_STE_LS_RSP && ctxp->entry_cnt == 2)) {
3589                 ctxp->state = LPFC_NVME_STE_LS_ABORT;
3590                 ctxp->entry_cnt++;
3591         } else {
3592                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3593                                 "6418 NVMET LS abort state mismatch "
3594                                 "IO x%x: %d %d\n",
3595                                 ctxp->oxid, ctxp->state, ctxp->entry_cnt);
3596                 ctxp->state = LPFC_NVME_STE_LS_ABORT;
3597         }
3598
3599         if (phba->nvmet_support && phba->targetport)
3600                 tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3601
3602         if (!ctxp->wqeq) {
3603                 /* Issue ABTS for this WQE based on iotag */
3604                 ctxp->wqeq = lpfc_sli_get_iocbq(phba);
3605                 if (!ctxp->wqeq) {
3606                         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3607                                         "6068 Abort failed: No wqeqs: "
3608                                         "xri: x%x\n", xri);
3609                         /* No failure to an ABTS request. */
3610                         kfree(ctxp);
3611                         return 0;
3612                 }
3613         }
3614         abts_wqeq = ctxp->wqeq;
3615
3616         if (lpfc_nvmet_unsol_issue_abort(phba, ctxp, sid, xri) == 0) {
3617                 rc = WQE_BUSY;
3618                 goto out;
3619         }
3620
3621         spin_lock_irqsave(&phba->hbalock, flags);
3622         abts_wqeq->cmd_cmpl = lpfc_nvmet_xmt_ls_abort_cmp;
3623         abts_wqeq->cmd_flag |=  LPFC_IO_NVME_LS;
3624         rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, abts_wqeq);
3625         spin_unlock_irqrestore(&phba->hbalock, flags);
3626         if (rc == WQE_SUCCESS) {
3627                 if (tgtp)
3628                         atomic_inc(&tgtp->xmt_abort_unsol);
3629                 return 0;
3630         }
3631 out:
3632         if (tgtp)
3633                 atomic_inc(&tgtp->xmt_abort_rsp_error);
3634         abts_wqeq->rsp_dmabuf = NULL;
3635         abts_wqeq->bpl_dmabuf = NULL;
3636         lpfc_sli_release_iocbq(phba, abts_wqeq);
3637         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3638                         "6056 Failed to Issue ABTS. Status x%x\n", rc);
3639         return 1;
3640 }
3641
3642 /**
3643  * lpfc_nvmet_invalidate_host
3644  *
3645  * @phba: pointer to the driver instance bound to an adapter port.
3646  * @ndlp: pointer to an lpfc_nodelist type
3647  *
3648  * This routine upcalls the nvmet transport to invalidate an NVME
3649  * host to which this target instance had active connections.
3650  */
3651 void
3652 lpfc_nvmet_invalidate_host(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
3653 {
3654         u32 ndlp_has_hh;
3655         struct lpfc_nvmet_tgtport *tgtp;
3656
3657         lpfc_printf_log(phba, KERN_INFO,
3658                         LOG_NVME | LOG_NVME_ABTS | LOG_NVME_DISC,
3659                         "6203 Invalidating hosthandle x%px\n",
3660                         ndlp);
3661
3662         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3663         atomic_set(&tgtp->state, LPFC_NVMET_INV_HOST_ACTIVE);
3664
3665         spin_lock_irq(&ndlp->lock);
3666         ndlp_has_hh = ndlp->fc4_xpt_flags & NLP_XPT_HAS_HH;
3667         spin_unlock_irq(&ndlp->lock);
3668
3669         /* Do not invalidate any nodes that do not have a hosthandle.
3670          * The host_release callbk will cause a node reference
3671          * count imbalance and a crash.
3672          */
3673         if (!ndlp_has_hh) {
3674                 lpfc_printf_log(phba, KERN_INFO,
3675                                 LOG_NVME | LOG_NVME_ABTS | LOG_NVME_DISC,
3676                                 "6204 Skip invalidate on node x%px DID x%x\n",
3677                                 ndlp, ndlp->nlp_DID);
3678                 return;
3679         }
3680
3681 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
3682         /* Need to get the nvmet_fc_target_port pointer here.*/
3683         nvmet_fc_invalidate_host(phba->targetport, ndlp);
3684 #endif
3685 }