scsi/lpfc/lpfc_nvmet.c

0001 /*******************************************************************
0002  * This file is part of the Emulex Linux Device Driver for         *
0003  * Fibre Channel Host Bus Adapters.                                *
0004  * Copyright (C) 2017-2022 Broadcom. All Rights Reserved. The term *
0005  * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.     *
0006  * Copyright (C) 2004-2016 Emulex.  All rights reserved.           *
0007  * EMULEX and SLI are trademarks of Emulex.                        *
0008  * www.broadcom.com                                                *
0009  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
0010  *                                                                 *
0011  * This program is free software; you can redistribute it and/or   *
0012  * modify it under the terms of version 2 of the GNU General       *
0013  * Public License as published by the Free Software Foundation.    *
0014  * This program is distributed in the hope that it will be useful. *
0015  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
0016  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
0017  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
0018  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
0019  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
0020  * more details, a copy of which can be found in the file COPYING  *
0021  * included with this package.                                     *
0022  ********************************************************************/
0023 #include <linux/pci.h>
0024 #include <linux/slab.h>
0025 #include <linux/interrupt.h>
0026 #include <linux/delay.h>
0027 #include <asm/unaligned.h>
0028 #include <linux/crc-t10dif.h>
0029 #include <net/checksum.h>
0030
0031 #include <scsi/scsi.h>
0032 #include <scsi/scsi_device.h>
0033 #include <scsi/scsi_eh.h>
0034 #include <scsi/scsi_host.h>
0035 #include <scsi/scsi_tcq.h>
0036 #include <scsi/scsi_transport_fc.h>
0037 #include <scsi/fc/fc_fs.h>
0038
0039 #include "lpfc_version.h"
0040 #include "lpfc_hw4.h"
0041 #include "lpfc_hw.h"
0042 #include "lpfc_sli.h"
0043 #include "lpfc_sli4.h"
0044 #include "lpfc_nl.h"
0045 #include "lpfc_disc.h"
0046 #include "lpfc.h"
0047 #include "lpfc_scsi.h"
0048 #include "lpfc_nvme.h"
0049 #include "lpfc_logmsg.h"
0050 #include "lpfc_crtn.h"
0051 #include "lpfc_vport.h"
0052 #include "lpfc_debugfs.h"
0053
0054 static struct lpfc_iocbq *lpfc_nvmet_prep_ls_wqe(struct lpfc_hba *,
0055                          struct lpfc_async_xchg_ctx *,
0056                          dma_addr_t rspbuf,
0057                          uint16_t rspsize);
0058 static struct lpfc_iocbq *lpfc_nvmet_prep_fcp_wqe(struct lpfc_hba *,
0059                           struct lpfc_async_xchg_ctx *);
0060 static int lpfc_nvmet_sol_fcp_issue_abort(struct lpfc_hba *,
0061                       struct lpfc_async_xchg_ctx *,
0062                       uint32_t, uint16_t);
0063 static int lpfc_nvmet_unsol_fcp_issue_abort(struct lpfc_hba *,
0064                         struct lpfc_async_xchg_ctx *,
0065                         uint32_t, uint16_t);
0066 static void lpfc_nvmet_wqfull_flush(struct lpfc_hba *, struct lpfc_queue *,
0067                     struct lpfc_async_xchg_ctx *);
0068 static void lpfc_nvmet_fcp_rqst_defer_work(struct work_struct *);
0069
0070 static void lpfc_nvmet_process_rcv_fcp_req(struct lpfc_nvmet_ctxbuf *ctx_buf);
0071
0072 static union lpfc_wqe128 lpfc_tsend_cmd_template;
0073 static union lpfc_wqe128 lpfc_treceive_cmd_template;
0074 static union lpfc_wqe128 lpfc_trsp_cmd_template;
0075
0076 /* Setup WQE templates for NVME IOs */
0077 void
0078 lpfc_nvmet_cmd_template(void)
0079 {
0080     union lpfc_wqe128 *wqe;
0081
0082     /* TSEND template */
0083     wqe = &lpfc_tsend_cmd_template;
0084     memset(wqe, 0, sizeof(union lpfc_wqe128));
0085
0086     /* Word 0, 1, 2 - BDE is variable */
0087
0088     /* Word 3 - payload_offset_len is zero */
0089
0090     /* Word 4 - relative_offset is variable */
0091
0092     /* Word 5 - is zero */
0093
0094     /* Word 6 - ctxt_tag, xri_tag is variable */
0095
0096     /* Word 7 - wqe_ar is variable */
0097     bf_set(wqe_cmnd, &wqe->fcp_tsend.wqe_com, CMD_FCP_TSEND64_WQE);
0098     bf_set(wqe_pu, &wqe->fcp_tsend.wqe_com, PARM_REL_OFF);
0099     bf_set(wqe_class, &wqe->fcp_tsend.wqe_com, CLASS3);
0100     bf_set(wqe_ct, &wqe->fcp_tsend.wqe_com, SLI4_CT_RPI);
0101     bf_set(wqe_ar, &wqe->fcp_tsend.wqe_com, 1);
0102
0103     /* Word 8 - abort_tag is variable */
0104
0105     /* Word 9  - reqtag, rcvoxid is variable */
0106
0107     /* Word 10 - wqes, xc is variable */
0108     bf_set(wqe_xchg, &wqe->fcp_tsend.wqe_com, LPFC_NVME_XCHG);
0109     bf_set(wqe_dbde, &wqe->fcp_tsend.wqe_com, 1);
0110     bf_set(wqe_wqes, &wqe->fcp_tsend.wqe_com, 0);
0111     bf_set(wqe_xc, &wqe->fcp_tsend.wqe_com, 1);
0112     bf_set(wqe_iod, &wqe->fcp_tsend.wqe_com, LPFC_WQE_IOD_WRITE);
0113     bf_set(wqe_lenloc, &wqe->fcp_tsend.wqe_com, LPFC_WQE_LENLOC_WORD12);
0114
0115     /* Word 11 - sup, irsp, irsplen is variable */
0116     bf_set(wqe_cmd_type, &wqe->fcp_tsend.wqe_com, FCP_COMMAND_TSEND);
0117     bf_set(wqe_cqid, &wqe->fcp_tsend.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
0118     bf_set(wqe_sup, &wqe->fcp_tsend.wqe_com, 0);
0119     bf_set(wqe_irsp, &wqe->fcp_tsend.wqe_com, 0);
0120     bf_set(wqe_irsplen, &wqe->fcp_tsend.wqe_com, 0);
0121     bf_set(wqe_pbde, &wqe->fcp_tsend.wqe_com, 0);
0122
0123     /* Word 12 - fcp_data_len is variable */
0124
0125     /* Word 13, 14, 15 - PBDE is zero */
0126
0127     /* TRECEIVE template */
0128     wqe = &lpfc_treceive_cmd_template;
0129     memset(wqe, 0, sizeof(union lpfc_wqe128));
0130
0131     /* Word 0, 1, 2 - BDE is variable */
0132
0133     /* Word 3 */
0134     wqe->fcp_treceive.payload_offset_len = TXRDY_PAYLOAD_LEN;
0135
0136     /* Word 4 - relative_offset is variable */
0137
0138     /* Word 5 - is zero */
0139
0140     /* Word 6 - ctxt_tag, xri_tag is variable */
0141
0142     /* Word 7 */
0143     bf_set(wqe_cmnd, &wqe->fcp_treceive.wqe_com, CMD_FCP_TRECEIVE64_WQE);
0144     bf_set(wqe_pu, &wqe->fcp_treceive.wqe_com, PARM_REL_OFF);
0145     bf_set(wqe_class, &wqe->fcp_treceive.wqe_com, CLASS3);
0146     bf_set(wqe_ct, &wqe->fcp_treceive.wqe_com, SLI4_CT_RPI);
0147     bf_set(wqe_ar, &wqe->fcp_treceive.wqe_com, 0);
0148
0149     /* Word 8 - abort_tag is variable */
0150
0151     /* Word 9  - reqtag, rcvoxid is variable */
0152
0153     /* Word 10 - xc is variable */
0154     bf_set(wqe_dbde, &wqe->fcp_treceive.wqe_com, 1);
0155     bf_set(wqe_wqes, &wqe->fcp_treceive.wqe_com, 0);
0156     bf_set(wqe_xchg, &wqe->fcp_treceive.wqe_com, LPFC_NVME_XCHG);
0157     bf_set(wqe_iod, &wqe->fcp_treceive.wqe_com, LPFC_WQE_IOD_READ);
0158     bf_set(wqe_lenloc, &wqe->fcp_treceive.wqe_com, LPFC_WQE_LENLOC_WORD12);
0159     bf_set(wqe_xc, &wqe->fcp_tsend.wqe_com, 1);
0160
0161     /* Word 11 - pbde is variable */
0162     bf_set(wqe_cmd_type, &wqe->fcp_treceive.wqe_com, FCP_COMMAND_TRECEIVE);
0163     bf_set(wqe_cqid, &wqe->fcp_treceive.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
0164     bf_set(wqe_sup, &wqe->fcp_treceive.wqe_com, 0);
0165     bf_set(wqe_irsp, &wqe->fcp_treceive.wqe_com, 0);
0166     bf_set(wqe_irsplen, &wqe->fcp_treceive.wqe_com, 0);
0167     bf_set(wqe_pbde, &wqe->fcp_treceive.wqe_com, 1);
0168
0169     /* Word 12 - fcp_data_len is variable */
0170
0171     /* Word 13, 14, 15 - PBDE is variable */
0172
0173     /* TRSP template */
0174     wqe = &lpfc_trsp_cmd_template;
0175     memset(wqe, 0, sizeof(union lpfc_wqe128));
0176
0177     /* Word 0, 1, 2 - BDE is variable */
0178
0179     /* Word 3 - response_len is variable */
0180
0181     /* Word 4, 5 - is zero */
0182
0183     /* Word 6 - ctxt_tag, xri_tag is variable */
0184
0185     /* Word 7 */
0186     bf_set(wqe_cmnd, &wqe->fcp_trsp.wqe_com, CMD_FCP_TRSP64_WQE);
0187     bf_set(wqe_pu, &wqe->fcp_trsp.wqe_com, PARM_UNUSED);
0188     bf_set(wqe_class, &wqe->fcp_trsp.wqe_com, CLASS3);
0189     bf_set(wqe_ct, &wqe->fcp_trsp.wqe_com, SLI4_CT_RPI);
0190     bf_set(wqe_ag, &wqe->fcp_trsp.wqe_com, 1); /* wqe_ar */
0191
0192     /* Word 8 - abort_tag is variable */
0193
0194     /* Word 9  - reqtag is variable */
0195
0196     /* Word 10 wqes, xc is variable */
0197     bf_set(wqe_dbde, &wqe->fcp_trsp.wqe_com, 1);
0198     bf_set(wqe_xchg, &wqe->fcp_trsp.wqe_com, LPFC_NVME_XCHG);
0199     bf_set(wqe_wqes, &wqe->fcp_trsp.wqe_com, 0);
0200     bf_set(wqe_xc, &wqe->fcp_trsp.wqe_com, 0);
0201     bf_set(wqe_iod, &wqe->fcp_trsp.wqe_com, LPFC_WQE_IOD_NONE);
0202     bf_set(wqe_lenloc, &wqe->fcp_trsp.wqe_com, LPFC_WQE_LENLOC_WORD3);
0203
0204     /* Word 11 irsp, irsplen is variable */
0205     bf_set(wqe_cmd_type, &wqe->fcp_trsp.wqe_com, FCP_COMMAND_TRSP);
0206     bf_set(wqe_cqid, &wqe->fcp_trsp.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
0207     bf_set(wqe_sup, &wqe->fcp_trsp.wqe_com, 0);
0208     bf_set(wqe_irsp, &wqe->fcp_trsp.wqe_com, 0);
0209     bf_set(wqe_irsplen, &wqe->fcp_trsp.wqe_com, 0);
0210     bf_set(wqe_pbde, &wqe->fcp_trsp.wqe_com, 0);
0211
0212     /* Word 12, 13, 14, 15 - is zero */
0213 }
0214
0215 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
0216 static struct lpfc_async_xchg_ctx *
0217 lpfc_nvmet_get_ctx_for_xri(struct lpfc_hba *phba, u16 xri)
0218 {
0219     struct lpfc_async_xchg_ctx *ctxp;
0220     unsigned long iflag;
0221     bool found = false;
0222
0223     spin_lock_irqsave(&phba->sli4_hba.t_active_list_lock, iflag);
0224     list_for_each_entry(ctxp, &phba->sli4_hba.t_active_ctx_list, list) {
0225         if (ctxp->ctxbuf->sglq->sli4_xritag != xri)
0226             continue;
0227
0228         found = true;
0229         break;
0230     }
0231     spin_unlock_irqrestore(&phba->sli4_hba.t_active_list_lock, iflag);
0232     if (found)
0233         return ctxp;
0234
0235     return NULL;
0236 }
0237
0238 static struct lpfc_async_xchg_ctx *
0239 lpfc_nvmet_get_ctx_for_oxid(struct lpfc_hba *phba, u16 oxid, u32 sid)
0240 {
0241     struct lpfc_async_xchg_ctx *ctxp;
0242     unsigned long iflag;
0243     bool found = false;
0244
0245     spin_lock_irqsave(&phba->sli4_hba.t_active_list_lock, iflag);
0246     list_for_each_entry(ctxp, &phba->sli4_hba.t_active_ctx_list, list) {
0247         if (ctxp->oxid != oxid || ctxp->sid != sid)
0248             continue;
0249
0250         found = true;
0251         break;
0252     }
0253     spin_unlock_irqrestore(&phba->sli4_hba.t_active_list_lock, iflag);
0254     if (found)
0255         return ctxp;
0256
0257     return NULL;
0258 }
0259 #endif
0260
0261 static void
0262 lpfc_nvmet_defer_release(struct lpfc_hba *phba,
0263             struct lpfc_async_xchg_ctx *ctxp)
0264 {
0265     lockdep_assert_held(&ctxp->ctxlock);
0266
0267     lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
0268             "6313 NVMET Defer ctx release oxid x%x flg x%x\n",
0269             ctxp->oxid, ctxp->flag);
0270
0271     if (ctxp->flag & LPFC_NVME_CTX_RLS)
0272         return;
0273
0274     ctxp->flag |= LPFC_NVME_CTX_RLS;
0275     spin_lock(&phba->sli4_hba.t_active_list_lock);
0276     list_del(&ctxp->list);
0277     spin_unlock(&phba->sli4_hba.t_active_list_lock);
0278     spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
0279     list_add_tail(&ctxp->list, &phba->sli4_hba.lpfc_abts_nvmet_ctx_list);
0280     spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
0281 }
0282
0283 /**
0284  * __lpfc_nvme_xmt_ls_rsp_cmp - Generic completion handler for the
0285  *         transmission of an NVME LS response.
0286  * @phba: Pointer to HBA context object.
0287  * @cmdwqe: Pointer to driver command WQE object.
0288  * @rspwqe: Pointer to driver response WQE object.
0289  *
0290  * The function is called from SLI ring event handler with no
0291  * lock held. The function frees memory resources used for the command
0292  * used to send the NVME LS RSP.
0293  **/
0294 void
0295 __lpfc_nvme_xmt_ls_rsp_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
0296                struct lpfc_iocbq *rspwqe)
0297 {
0298     struct lpfc_async_xchg_ctx *axchg = cmdwqe->context_un.axchg;
0299     struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
0300     struct nvmefc_ls_rsp *ls_rsp = &axchg->ls_rsp;
0301     uint32_t status, result;
0302
0303     status = bf_get(lpfc_wcqe_c_status, wcqe) & LPFC_IOCB_STATUS_MASK;
0304     result = wcqe->parameter;
0305
0306     if (axchg->state != LPFC_NVME_STE_LS_RSP || axchg->entry_cnt != 2) {
0307         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
0308                 "6410 NVMEx LS cmpl state mismatch IO x%x: "
0309                 "%d %d\n",
0310                 axchg->oxid, axchg->state, axchg->entry_cnt);
0311     }
0312
0313     lpfc_nvmeio_data(phba, "NVMEx LS  CMPL: xri x%x stat x%x result x%x\n",
0314              axchg->oxid, status, result);
0315
0316     lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
0317             "6038 NVMEx LS rsp cmpl: %d %d oxid x%x\n",
0318             status, result, axchg->oxid);
0319
0320     lpfc_nlp_put(cmdwqe->ndlp);
0321     cmdwqe->context_un.axchg = NULL;
0322     cmdwqe->bpl_dmabuf = NULL;
0323     lpfc_sli_release_iocbq(phba, cmdwqe);
0324     ls_rsp->done(ls_rsp);
0325     lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
0326             "6200 NVMEx LS rsp cmpl done status %d oxid x%x\n",
0327             status, axchg->oxid);
0328     kfree(axchg);
0329 }
0330
0331 /**
0332  * lpfc_nvmet_xmt_ls_rsp_cmp - Completion handler for LS Response
0333  * @phba: Pointer to HBA context object.
0334  * @cmdwqe: Pointer to driver command WQE object.
0335  * @rspwqe: Pointer to driver response WQE object.
0336  *
0337  * The function is called from SLI ring event handler with no
0338  * lock held. This function is the completion handler for NVME LS commands
0339  * The function updates any states and statistics, then calls the
0340  * generic completion handler to free resources.
0341  **/
0342 static void
0343 lpfc_nvmet_xmt_ls_rsp_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
0344               struct lpfc_iocbq *rspwqe)
0345 {
0346     struct lpfc_nvmet_tgtport *tgtp;
0347     uint32_t status, result;
0348     struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
0349
0350     if (!phba->targetport)
0351         goto finish;
0352
0353     status = bf_get(lpfc_wcqe_c_status, wcqe) & LPFC_IOCB_STATUS_MASK;
0354     result = wcqe->parameter;
0355
0356     tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
0357     if (tgtp) {
0358         if (status) {
0359             atomic_inc(&tgtp->xmt_ls_rsp_error);
0360             if (result == IOERR_ABORT_REQUESTED)
0361                 atomic_inc(&tgtp->xmt_ls_rsp_aborted);
0362             if (bf_get(lpfc_wcqe_c_xb, wcqe))
0363                 atomic_inc(&tgtp->xmt_ls_rsp_xb_set);
0364         } else {
0365             atomic_inc(&tgtp->xmt_ls_rsp_cmpl);
0366         }
0367     }
0368
0369 finish:
0370     __lpfc_nvme_xmt_ls_rsp_cmp(phba, cmdwqe, rspwqe);
0371 }
0372
0373 /**
0374  * lpfc_nvmet_ctxbuf_post - Repost a NVMET RQ DMA buffer and clean up context
0375  * @phba: HBA buffer is associated with
0376  * @ctx_buf: ctx buffer context
0377  *
0378  * Description: Frees the given DMA buffer in the appropriate way given by
0379  * reposting it to its associated RQ so it can be reused.
0380  *
0381  * Notes: Takes phba->hbalock.  Can be called with or without other locks held.
0382  *
0383  * Returns: None
0384  **/
0385 void
0386 lpfc_nvmet_ctxbuf_post(struct lpfc_hba *phba, struct lpfc_nvmet_ctxbuf *ctx_buf)
0387 {
0388 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
0389     struct lpfc_async_xchg_ctx *ctxp = ctx_buf->context;
0390     struct lpfc_nvmet_tgtport *tgtp;
0391     struct fc_frame_header *fc_hdr;
0392     struct rqb_dmabuf *nvmebuf;
0393     struct lpfc_nvmet_ctx_info *infop;
0394     uint32_t size, oxid, sid;
0395     int cpu;
0396     unsigned long iflag;
0397
0398     if (ctxp->state == LPFC_NVME_STE_FREE) {
0399         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
0400                 "6411 NVMET free, already free IO x%x: %d %d\n",
0401                 ctxp->oxid, ctxp->state, ctxp->entry_cnt);
0402     }
0403
0404     if (ctxp->rqb_buffer) {
0405         spin_lock_irqsave(&ctxp->ctxlock, iflag);
0406         nvmebuf = ctxp->rqb_buffer;
0407         /* check if freed in another path whilst acquiring lock */
0408         if (nvmebuf) {
0409             ctxp->rqb_buffer = NULL;
0410             if (ctxp->flag & LPFC_NVME_CTX_REUSE_WQ) {
0411                 ctxp->flag &= ~LPFC_NVME_CTX_REUSE_WQ;
0412                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
0413                 nvmebuf->hrq->rqbp->rqb_free_buffer(phba,
0414                                     nvmebuf);
0415             } else {
0416                 spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
0417                 /* repost */
0418                 lpfc_rq_buf_free(phba, &nvmebuf->hbuf);
0419             }
0420         } else {
0421             spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
0422         }
0423     }
0424     ctxp->state = LPFC_NVME_STE_FREE;
0425
0426     spin_lock_irqsave(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
0427     if (phba->sli4_hba.nvmet_io_wait_cnt) {
0428         list_remove_head(&phba->sli4_hba.lpfc_nvmet_io_wait_list,
0429                  nvmebuf, struct rqb_dmabuf,
0430                  hbuf.list);
0431         phba->sli4_hba.nvmet_io_wait_cnt--;
0432         spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock,
0433                        iflag);
0434
0435         fc_hdr = (struct fc_frame_header *)(nvmebuf->hbuf.virt);
0436         oxid = be16_to_cpu(fc_hdr->fh_ox_id);
0437         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
0438         size = nvmebuf->bytes_recv;
0439         sid = sli4_sid_from_fc_hdr(fc_hdr);
0440
0441         ctxp = (struct lpfc_async_xchg_ctx *)ctx_buf->context;
0442         ctxp->wqeq = NULL;
0443         ctxp->offset = 0;
0444         ctxp->phba = phba;
0445         ctxp->size = size;
0446         ctxp->oxid = oxid;
0447         ctxp->sid = sid;
0448         ctxp->state = LPFC_NVME_STE_RCV;
0449         ctxp->entry_cnt = 1;
0450         ctxp->flag = 0;
0451         ctxp->ctxbuf = ctx_buf;
0452         ctxp->rqb_buffer = (void *)nvmebuf;
0453         spin_lock_init(&ctxp->ctxlock);
0454
0455 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
0456         /* NOTE: isr time stamp is stale when context is re-assigned*/
0457         if (ctxp->ts_isr_cmd) {
0458             ctxp->ts_cmd_nvme = 0;
0459             ctxp->ts_nvme_data = 0;
0460             ctxp->ts_data_wqput = 0;
0461             ctxp->ts_isr_data = 0;
0462             ctxp->ts_data_nvme = 0;
0463             ctxp->ts_nvme_status = 0;
0464             ctxp->ts_status_wqput = 0;
0465             ctxp->ts_isr_status = 0;
0466             ctxp->ts_status_nvme = 0;
0467         }
0468 #endif
0469         atomic_inc(&tgtp->rcv_fcp_cmd_in);
0470
0471         /* Indicate that a replacement buffer has been posted */
0472         spin_lock_irqsave(&ctxp->ctxlock, iflag);
0473         ctxp->flag |= LPFC_NVME_CTX_REUSE_WQ;
0474         spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
0475
0476         if (!queue_work(phba->wq, &ctx_buf->defer_work)) {
0477             atomic_inc(&tgtp->rcv_fcp_cmd_drop);
0478             lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
0479                     "6181 Unable to queue deferred work "
0480                     "for oxid x%x. "
0481                     "FCP Drop IO [x%x x%x x%x]\n",
0482                     ctxp->oxid,
0483                     atomic_read(&tgtp->rcv_fcp_cmd_in),
0484                     atomic_read(&tgtp->rcv_fcp_cmd_out),
0485                     atomic_read(&tgtp->xmt_fcp_release));
0486
0487             spin_lock_irqsave(&ctxp->ctxlock, iflag);
0488             lpfc_nvmet_defer_release(phba, ctxp);
0489             spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
0490             lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, sid, oxid);
0491         }
0492         return;
0493     }
0494     spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
0495
0496     /*
0497      * Use the CPU context list, from the MRQ the IO was received on
0498      * (ctxp->idx), to save context structure.
0499      */
0500     spin_lock_irqsave(&phba->sli4_hba.t_active_list_lock, iflag);
0501     list_del_init(&ctxp->list);
0502     spin_unlock_irqrestore(&phba->sli4_hba.t_active_list_lock, iflag);
0503     cpu = raw_smp_processor_id();
0504     infop = lpfc_get_ctx_list(phba, cpu, ctxp->idx);
0505     spin_lock_irqsave(&infop->nvmet_ctx_list_lock, iflag);
0506     list_add_tail(&ctx_buf->list, &infop->nvmet_ctx_list);
0507     infop->nvmet_ctx_list_cnt++;
0508     spin_unlock_irqrestore(&infop->nvmet_ctx_list_lock, iflag);
0509 #endif
0510 }
0511
0512 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
0513 static void
0514 lpfc_nvmet_ktime(struct lpfc_hba *phba,
0515          struct lpfc_async_xchg_ctx *ctxp)
0516 {
0517     uint64_t seg1, seg2, seg3, seg4, seg5;
0518     uint64_t seg6, seg7, seg8, seg9, seg10;
0519     uint64_t segsum;
0520
0521     if (!ctxp->ts_isr_cmd || !ctxp->ts_cmd_nvme ||
0522         !ctxp->ts_nvme_data || !ctxp->ts_data_wqput ||
0523         !ctxp->ts_isr_data || !ctxp->ts_data_nvme ||
0524         !ctxp->ts_nvme_status || !ctxp->ts_status_wqput ||
0525         !ctxp->ts_isr_status || !ctxp->ts_status_nvme)
0526         return;
0527
0528     if (ctxp->ts_status_nvme < ctxp->ts_isr_cmd)
0529         return;
0530     if (ctxp->ts_isr_cmd  > ctxp->ts_cmd_nvme)
0531         return;
0532     if (ctxp->ts_cmd_nvme > ctxp->ts_nvme_data)
0533         return;
0534     if (ctxp->ts_nvme_data > ctxp->ts_data_wqput)
0535         return;
0536     if (ctxp->ts_data_wqput > ctxp->ts_isr_data)
0537         return;
0538     if (ctxp->ts_isr_data > ctxp->ts_data_nvme)
0539         return;
0540     if (ctxp->ts_data_nvme > ctxp->ts_nvme_status)
0541         return;
0542     if (ctxp->ts_nvme_status > ctxp->ts_status_wqput)
0543         return;
0544     if (ctxp->ts_status_wqput > ctxp->ts_isr_status)
0545         return;
0546     if (ctxp->ts_isr_status > ctxp->ts_status_nvme)
0547         return;
0548     /*
0549      * Segment 1 - Time from FCP command received by MSI-X ISR
0550      * to FCP command is passed to NVME Layer.
0551      * Segment 2 - Time from FCP command payload handed
0552      * off to NVME Layer to Driver receives a Command op
0553      * from NVME Layer.
0554      * Segment 3 - Time from Driver receives a Command op
0555      * from NVME Layer to Command is put on WQ.
0556      * Segment 4 - Time from Driver WQ put is done
0557      * to MSI-X ISR for Command cmpl.
0558      * Segment 5 - Time from MSI-X ISR for Command cmpl to
0559      * Command cmpl is passed to NVME Layer.
0560      * Segment 6 - Time from Command cmpl is passed to NVME
0561      * Layer to Driver receives a RSP op from NVME Layer.
0562      * Segment 7 - Time from Driver receives a RSP op from
0563      * NVME Layer to WQ put is done on TRSP FCP Status.
0564      * Segment 8 - Time from Driver WQ put is done on TRSP
0565      * FCP Status to MSI-X ISR for TRSP cmpl.
0566      * Segment 9 - Time from MSI-X ISR for TRSP cmpl to
0567      * TRSP cmpl is passed to NVME Layer.
0568      * Segment 10 - Time from FCP command received by
0569      * MSI-X ISR to command is completed on wire.
0570      * (Segments 1 thru 8) for READDATA / WRITEDATA
0571      * (Segments 1 thru 4) for READDATA_RSP
0572      */
0573     seg1 = ctxp->ts_cmd_nvme - ctxp->ts_isr_cmd;
0574     segsum = seg1;
0575
0576     seg2 = ctxp->ts_nvme_data - ctxp->ts_isr_cmd;
0577     if (segsum > seg2)
0578         return;
0579     seg2 -= segsum;
0580     segsum += seg2;
0581
0582     seg3 = ctxp->ts_data_wqput - ctxp->ts_isr_cmd;
0583     if (segsum > seg3)
0584         return;
0585     seg3 -= segsum;
0586     segsum += seg3;
0587
0588     seg4 = ctxp->ts_isr_data - ctxp->ts_isr_cmd;
0589     if (segsum > seg4)
0590         return;
0591     seg4 -= segsum;
0592     segsum += seg4;
0593
0594     seg5 = ctxp->ts_data_nvme - ctxp->ts_isr_cmd;
0595     if (segsum > seg5)
0596         return;
0597     seg5 -= segsum;
0598     segsum += seg5;
0599
0600
0601     /* For auto rsp commands seg6 thru seg10 will be 0 */
0602     if (ctxp->ts_nvme_status > ctxp->ts_data_nvme) {
0603         seg6 = ctxp->ts_nvme_status - ctxp->ts_isr_cmd;
0604         if (segsum > seg6)
0605             return;
0606         seg6 -= segsum;
0607         segsum += seg6;
0608
0609         seg7 = ctxp->ts_status_wqput - ctxp->ts_isr_cmd;
0610         if (segsum > seg7)
0611             return;
0612         seg7 -= segsum;
0613         segsum += seg7;
0614
0615         seg8 = ctxp->ts_isr_status - ctxp->ts_isr_cmd;
0616         if (segsum > seg8)
0617             return;
0618         seg8 -= segsum;
0619         segsum += seg8;
0620
0621         seg9 = ctxp->ts_status_nvme - ctxp->ts_isr_cmd;
0622         if (segsum > seg9)
0623             return;
0624         seg9 -= segsum;
0625         segsum += seg9;
0626
0627         if (ctxp->ts_isr_status < ctxp->ts_isr_cmd)
0628             return;
0629         seg10 = (ctxp->ts_isr_status -
0630             ctxp->ts_isr_cmd);
0631     } else {
0632         if (ctxp->ts_isr_data < ctxp->ts_isr_cmd)
0633             return;
0634         seg6 =  0;
0635         seg7 =  0;
0636         seg8 =  0;
0637         seg9 =  0;
0638         seg10 = (ctxp->ts_isr_data - ctxp->ts_isr_cmd);
0639     }
0640
0641     phba->ktime_seg1_total += seg1;
0642     if (seg1 < phba->ktime_seg1_min)
0643         phba->ktime_seg1_min = seg1;
0644     else if (seg1 > phba->ktime_seg1_max)
0645         phba->ktime_seg1_max = seg1;
0646
0647     phba->ktime_seg2_total += seg2;
0648     if (seg2 < phba->ktime_seg2_min)
0649         phba->ktime_seg2_min = seg2;
0650     else if (seg2 > phba->ktime_seg2_max)
0651         phba->ktime_seg2_max = seg2;
0652
0653     phba->ktime_seg3_total += seg3;
0654     if (seg3 < phba->ktime_seg3_min)
0655         phba->ktime_seg3_min = seg3;
0656     else if (seg3 > phba->ktime_seg3_max)
0657         phba->ktime_seg3_max = seg3;
0658
0659     phba->ktime_seg4_total += seg4;
0660     if (seg4 < phba->ktime_seg4_min)
0661         phba->ktime_seg4_min = seg4;
0662     else if (seg4 > phba->ktime_seg4_max)
0663         phba->ktime_seg4_max = seg4;
0664
0665     phba->ktime_seg5_total += seg5;
0666     if (seg5 < phba->ktime_seg5_min)
0667         phba->ktime_seg5_min = seg5;
0668     else if (seg5 > phba->ktime_seg5_max)
0669         phba->ktime_seg5_max = seg5;
0670
0671     phba->ktime_data_samples++;
0672     if (!seg6)
0673         goto out;
0674
0675     phba->ktime_seg6_total += seg6;
0676     if (seg6 < phba->ktime_seg6_min)
0677         phba->ktime_seg6_min = seg6;
0678     else if (seg6 > phba->ktime_seg6_max)
0679         phba->ktime_seg6_max = seg6;
0680
0681     phba->ktime_seg7_total += seg7;
0682     if (seg7 < phba->ktime_seg7_min)
0683         phba->ktime_seg7_min = seg7;
0684     else if (seg7 > phba->ktime_seg7_max)
0685         phba->ktime_seg7_max = seg7;
0686
0687     phba->ktime_seg8_total += seg8;
0688     if (seg8 < phba->ktime_seg8_min)
0689         phba->ktime_seg8_min = seg8;
0690     else if (seg8 > phba->ktime_seg8_max)
0691         phba->ktime_seg8_max = seg8;
0692
0693     phba->ktime_seg9_total += seg9;
0694     if (seg9 < phba->ktime_seg9_min)
0695         phba->ktime_seg9_min = seg9;
0696     else if (seg9 > phba->ktime_seg9_max)
0697         phba->ktime_seg9_max = seg9;
0698 out:
0699     phba->ktime_seg10_total += seg10;
0700     if (seg10 < phba->ktime_seg10_min)
0701         phba->ktime_seg10_min = seg10;
0702     else if (seg10 > phba->ktime_seg10_max)
0703         phba->ktime_seg10_max = seg10;
0704     phba->ktime_status_samples++;
0705 }
0706 #endif
0707
0708 /**
0709  * lpfc_nvmet_xmt_fcp_op_cmp - Completion handler for FCP Response
0710  * @phba: Pointer to HBA context object.
0711  * @cmdwqe: Pointer to driver command WQE object.
0712  * @rspwqe: Pointer to driver response WQE object.
0713  *
0714  * The function is called from SLI ring event handler with no
0715  * lock held. This function is the completion handler for NVME FCP commands
0716  * The function frees memory resources used for the NVME commands.
0717  **/
0718 static void
0719 lpfc_nvmet_xmt_fcp_op_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
0720               struct lpfc_iocbq *rspwqe)
0721 {
0722     struct lpfc_nvmet_tgtport *tgtp;
0723     struct nvmefc_tgt_fcp_req *rsp;
0724     struct lpfc_async_xchg_ctx *ctxp;
0725     uint32_t status, result, op, logerr;
0726     struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
0727 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
0728     int id;
0729 #endif
0730
0731     ctxp = cmdwqe->context_un.axchg;
0732     ctxp->flag &= ~LPFC_NVME_IO_INP;
0733
0734     rsp = &ctxp->hdlrctx.fcp_req;
0735     op = rsp->op;
0736
0737     status = bf_get(lpfc_wcqe_c_status, wcqe);
0738     result = wcqe->parameter;
0739
0740     if (phba->targetport)
0741         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
0742     else
0743         tgtp = NULL;
0744
0745     lpfc_nvmeio_data(phba, "NVMET FCP CMPL: xri x%x op x%x status x%x\n",
0746              ctxp->oxid, op, status);
0747
0748     if (status) {
0749         rsp->fcp_error = NVME_SC_DATA_XFER_ERROR;
0750         rsp->transferred_length = 0;
0751         if (tgtp) {
0752             atomic_inc(&tgtp->xmt_fcp_rsp_error);
0753             if (result == IOERR_ABORT_REQUESTED)
0754                 atomic_inc(&tgtp->xmt_fcp_rsp_aborted);
0755         }
0756
0757         logerr = LOG_NVME_IOERR;
0758
0759         /* pick up SLI4 exhange busy condition */
0760         if (bf_get(lpfc_wcqe_c_xb, wcqe)) {
0761             ctxp->flag |= LPFC_NVME_XBUSY;
0762             logerr |= LOG_NVME_ABTS;
0763             if (tgtp)
0764                 atomic_inc(&tgtp->xmt_fcp_rsp_xb_set);
0765
0766         } else {
0767             ctxp->flag &= ~LPFC_NVME_XBUSY;
0768         }
0769
0770         lpfc_printf_log(phba, KERN_INFO, logerr,
0771                 "6315 IO Error Cmpl oxid: x%x xri: x%x %x/%x "
0772                 "XBUSY:x%x\n",
0773                 ctxp->oxid, ctxp->ctxbuf->sglq->sli4_xritag,
0774                 status, result, ctxp->flag);
0775
0776     } else {
0777         rsp->fcp_error = NVME_SC_SUCCESS;
0778         if (op == NVMET_FCOP_RSP)
0779             rsp->transferred_length = rsp->rsplen;
0780         else
0781             rsp->transferred_length = rsp->transfer_length;
0782         if (tgtp)
0783             atomic_inc(&tgtp->xmt_fcp_rsp_cmpl);
0784     }
0785
0786     if ((op == NVMET_FCOP_READDATA_RSP) ||
0787         (op == NVMET_FCOP_RSP)) {
0788         /* Sanity check */
0789         ctxp->state = LPFC_NVME_STE_DONE;
0790         ctxp->entry_cnt++;
0791
0792 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
0793         if (ctxp->ts_cmd_nvme) {
0794             if (rsp->op == NVMET_FCOP_READDATA_RSP) {
0795                 ctxp->ts_isr_data =
0796                     cmdwqe->isr_timestamp;
0797                 ctxp->ts_data_nvme =
0798                     ktime_get_ns();
0799                 ctxp->ts_nvme_status =
0800                     ctxp->ts_data_nvme;
0801                 ctxp->ts_status_wqput =
0802                     ctxp->ts_data_nvme;
0803                 ctxp->ts_isr_status =
0804                     ctxp->ts_data_nvme;
0805                 ctxp->ts_status_nvme =
0806                     ctxp->ts_data_nvme;
0807             } else {
0808                 ctxp->ts_isr_status =
0809                     cmdwqe->isr_timestamp;
0810                 ctxp->ts_status_nvme =
0811                     ktime_get_ns();
0812             }
0813         }
0814 #endif
0815         rsp->done(rsp);
0816 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
0817         if (ctxp->ts_cmd_nvme)
0818             lpfc_nvmet_ktime(phba, ctxp);
0819 #endif
0820         /* lpfc_nvmet_xmt_fcp_release() will recycle the context */
0821     } else {
0822         ctxp->entry_cnt++;
0823         memset_startat(cmdwqe, 0, cmd_flag);
0824 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
0825         if (ctxp->ts_cmd_nvme) {
0826             ctxp->ts_isr_data = cmdwqe->isr_timestamp;
0827             ctxp->ts_data_nvme = ktime_get_ns();
0828         }
0829 #endif
0830         rsp->done(rsp);
0831     }
0832 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
0833     if (phba->hdwqstat_on & LPFC_CHECK_NVMET_IO) {
0834         id = raw_smp_processor_id();
0835         this_cpu_inc(phba->sli4_hba.c_stat->cmpl_io);
0836         if (ctxp->cpu != id)
0837             lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
0838                     "6704 CPU Check cmdcmpl: "
0839                     "cpu %d expect %d\n",
0840                     id, ctxp->cpu);
0841     }
0842 #endif
0843 }
0844
0845 /**
0846  * __lpfc_nvme_xmt_ls_rsp - Generic service routine to issue transmit
0847  *         an NVME LS rsp for a prior NVME LS request that was received.
0848  * @axchg: pointer to exchange context for the NVME LS request the response
0849  *         is for.
0850  * @ls_rsp: pointer to the transport LS RSP that is to be sent
0851  * @xmt_ls_rsp_cmp: completion routine to call upon RSP transmit done
0852  *
0853  * This routine is used to format and send a WQE to transmit a NVME LS
0854  * Response.  The response is for a prior NVME LS request that was
0855  * received and posted to the transport.
0856  *
0857  * Returns:
0858  *  0 : if response successfully transmit
0859  *  non-zero : if response failed to transmit, of the form -Exxx.
0860  **/
0861 int
0862 __lpfc_nvme_xmt_ls_rsp(struct lpfc_async_xchg_ctx *axchg,
0863             struct nvmefc_ls_rsp *ls_rsp,
0864             void (*xmt_ls_rsp_cmp)(struct lpfc_hba *phba,
0865                 struct lpfc_iocbq *cmdwqe,
0866                 struct lpfc_iocbq *rspwqe))
0867 {
0868     struct lpfc_hba *phba = axchg->phba;
0869     struct hbq_dmabuf *nvmebuf = (struct hbq_dmabuf *)axchg->rqb_buffer;
0870     struct lpfc_iocbq *nvmewqeq;
0871     struct lpfc_dmabuf dmabuf;
0872     struct ulp_bde64 bpl;
0873     int rc;
0874
0875     if (phba->pport->load_flag & FC_UNLOADING)
0876         return -ENODEV;
0877
0878     lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
0879             "6023 NVMEx LS rsp oxid x%x\n", axchg->oxid);
0880
0881     if (axchg->state != LPFC_NVME_STE_LS_RCV || axchg->entry_cnt != 1) {
0882         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
0883                 "6412 NVMEx LS rsp state mismatch "
0884                 "oxid x%x: %d %d\n",
0885                 axchg->oxid, axchg->state, axchg->entry_cnt);
0886         return -EALREADY;
0887     }
0888     axchg->state = LPFC_NVME_STE_LS_RSP;
0889     axchg->entry_cnt++;
0890
0891     nvmewqeq = lpfc_nvmet_prep_ls_wqe(phba, axchg, ls_rsp->rspdma,
0892                      ls_rsp->rsplen);
0893     if (nvmewqeq == NULL) {
0894         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
0895                 "6150 NVMEx LS Drop Rsp x%x: Prep\n",
0896                 axchg->oxid);
0897         rc = -ENOMEM;
0898         goto out_free_buf;
0899     }
0900
0901     /* Save numBdes for bpl2sgl */
0902     nvmewqeq->num_bdes = 1;
0903     nvmewqeq->hba_wqidx = 0;
0904     nvmewqeq->bpl_dmabuf = &dmabuf;
0905     dmabuf.virt = &bpl;
0906     bpl.addrLow = nvmewqeq->wqe.xmit_sequence.bde.addrLow;
0907     bpl.addrHigh = nvmewqeq->wqe.xmit_sequence.bde.addrHigh;
0908     bpl.tus.f.bdeSize = ls_rsp->rsplen;
0909     bpl.tus.f.bdeFlags = 0;
0910     bpl.tus.w = le32_to_cpu(bpl.tus.w);
0911     /*
0912      * Note: although we're using stack space for the dmabuf, the
0913      * call to lpfc_sli4_issue_wqe is synchronous, so it will not
0914      * be referenced after it returns back to this routine.
0915      */
0916
0917     nvmewqeq->cmd_cmpl = xmt_ls_rsp_cmp;
0918     nvmewqeq->context_un.axchg = axchg;
0919
0920     lpfc_nvmeio_data(phba, "NVMEx LS RSP: xri x%x wqidx x%x len x%x\n",
0921              axchg->oxid, nvmewqeq->hba_wqidx, ls_rsp->rsplen);
0922
0923     rc = lpfc_sli4_issue_wqe(phba, axchg->hdwq, nvmewqeq);
0924
0925     /* clear to be sure there's no reference */
0926     nvmewqeq->bpl_dmabuf = NULL;
0927
0928     if (rc == WQE_SUCCESS) {
0929         /*
0930          * Okay to repost buffer here, but wait till cmpl
0931          * before freeing ctxp and iocbq.
0932          */
0933         lpfc_in_buf_free(phba, &nvmebuf->dbuf);
0934         return 0;
0935     }
0936
0937     lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
0938             "6151 NVMEx LS RSP x%x: failed to transmit %d\n",
0939             axchg->oxid, rc);
0940
0941     rc = -ENXIO;
0942
0943     lpfc_nlp_put(nvmewqeq->ndlp);
0944
0945 out_free_buf:
0946     /* Give back resources */
0947     lpfc_in_buf_free(phba, &nvmebuf->dbuf);
0948
0949     /*
0950      * As transport doesn't track completions of responses, if the rsp
0951      * fails to send, the transport will effectively ignore the rsp
0952      * and consider the LS done. However, the driver has an active
0953      * exchange open for the LS - so be sure to abort the exchange
0954      * if the response isn't sent.
0955      */
0956     lpfc_nvme_unsol_ls_issue_abort(phba, axchg, axchg->sid, axchg->oxid);
0957     return rc;
0958 }
0959
0960 /**
0961  * lpfc_nvmet_xmt_ls_rsp - Transmit NVME LS response
0962  * @tgtport: pointer to target port that NVME LS is to be transmit from.
0963  * @ls_rsp: pointer to the transport LS RSP that is to be sent
0964  *
0965  * Driver registers this routine to transmit responses for received NVME
0966  * LS requests.
0967  *
0968  * This routine is used to format and send a WQE to transmit a NVME LS
0969  * Response. The ls_rsp is used to reverse-map the LS to the original
0970  * NVME LS request sequence, which provides addressing information for
0971  * the remote port the LS to be sent to, as well as the exchange id
0972  * that is the LS is bound to.
0973  *
0974  * Returns:
0975  *  0 : if response successfully transmit
0976  *  non-zero : if response failed to transmit, of the form -Exxx.
0977  **/
0978 static int
0979 lpfc_nvmet_xmt_ls_rsp(struct nvmet_fc_target_port *tgtport,
0980               struct nvmefc_ls_rsp *ls_rsp)
0981 {
0982     struct lpfc_async_xchg_ctx *axchg =
0983         container_of(ls_rsp, struct lpfc_async_xchg_ctx, ls_rsp);
0984     struct lpfc_nvmet_tgtport *nvmep = tgtport->private;
0985     int rc;
0986
0987     if (axchg->phba->pport->load_flag & FC_UNLOADING)
0988         return -ENODEV;
0989
0990     rc = __lpfc_nvme_xmt_ls_rsp(axchg, ls_rsp, lpfc_nvmet_xmt_ls_rsp_cmp);
0991
0992     if (rc) {
0993         atomic_inc(&nvmep->xmt_ls_drop);
0994         /*
0995          * unless the failure is due to having already sent
0996          * the response, an abort will be generated for the
0997          * exchange if the rsp can't be sent.
0998          */
0999         if (rc != -EALREADY)
1000             atomic_inc(&nvmep->xmt_ls_abort);
1001         return rc;
1002     }
1003
1004     atomic_inc(&nvmep->xmt_ls_rsp);
1005     return 0;
1006 }
1007
1008 static int
1009 lpfc_nvmet_xmt_fcp_op(struct nvmet_fc_target_port *tgtport,
1010               struct nvmefc_tgt_fcp_req *rsp)
1011 {
1012     struct lpfc_nvmet_tgtport *lpfc_nvmep = tgtport->private;
1013     struct lpfc_async_xchg_ctx *ctxp =
1014         container_of(rsp, struct lpfc_async_xchg_ctx, hdlrctx.fcp_req);
1015     struct lpfc_hba *phba = ctxp->phba;
1016     struct lpfc_queue *wq;
1017     struct lpfc_iocbq *nvmewqeq;
1018     struct lpfc_sli_ring *pring;
1019     unsigned long iflags;
1020     int rc;
1021 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1022     int id;
1023 #endif
1024
1025     if (phba->pport->load_flag & FC_UNLOADING) {
1026         rc = -ENODEV;
1027         goto aerr;
1028     }
1029
1030 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1031     if (ctxp->ts_cmd_nvme) {
1032         if (rsp->op == NVMET_FCOP_RSP)
1033             ctxp->ts_nvme_status = ktime_get_ns();
1034         else
1035             ctxp->ts_nvme_data = ktime_get_ns();
1036     }
1037
1038     /* Setup the hdw queue if not already set */
1039     if (!ctxp->hdwq)
1040         ctxp->hdwq = &phba->sli4_hba.hdwq[rsp->hwqid];
1041
1042     if (phba->hdwqstat_on & LPFC_CHECK_NVMET_IO) {
1043         id = raw_smp_processor_id();
1044         this_cpu_inc(phba->sli4_hba.c_stat->xmt_io);
1045         if (rsp->hwqid != id)
1046             lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
1047                     "6705 CPU Check OP: "
1048                     "cpu %d expect %d\n",
1049                     id, rsp->hwqid);
1050         ctxp->cpu = id; /* Setup cpu for cmpl check */
1051     }
1052 #endif
1053
1054     /* Sanity check */
1055     if ((ctxp->flag & LPFC_NVME_ABTS_RCV) ||
1056         (ctxp->state == LPFC_NVME_STE_ABORT)) {
1057         atomic_inc(&lpfc_nvmep->xmt_fcp_drop);
1058         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1059                 "6102 IO oxid x%x aborted\n",
1060                 ctxp->oxid);
1061         rc = -ENXIO;
1062         goto aerr;
1063     }
1064
1065     nvmewqeq = lpfc_nvmet_prep_fcp_wqe(phba, ctxp);
1066     if (nvmewqeq == NULL) {
1067         atomic_inc(&lpfc_nvmep->xmt_fcp_drop);
1068         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1069                 "6152 FCP Drop IO x%x: Prep\n",
1070                 ctxp->oxid);
1071         rc = -ENXIO;
1072         goto aerr;
1073     }
1074
1075     nvmewqeq->cmd_cmpl = lpfc_nvmet_xmt_fcp_op_cmp;
1076     nvmewqeq->context_un.axchg = ctxp;
1077     nvmewqeq->cmd_flag |=  LPFC_IO_NVMET;
1078     ctxp->wqeq->hba_wqidx = rsp->hwqid;
1079
1080     lpfc_nvmeio_data(phba, "NVMET FCP CMND: xri x%x op x%x len x%x\n",
1081              ctxp->oxid, rsp->op, rsp->rsplen);
1082
1083     ctxp->flag |= LPFC_NVME_IO_INP;
1084     rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, nvmewqeq);
1085     if (rc == WQE_SUCCESS) {
1086 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
1087         if (!ctxp->ts_cmd_nvme)
1088             return 0;
1089         if (rsp->op == NVMET_FCOP_RSP)
1090             ctxp->ts_status_wqput = ktime_get_ns();
1091         else
1092             ctxp->ts_data_wqput = ktime_get_ns();
1093 #endif
1094         return 0;
1095     }
1096
1097     if (rc == -EBUSY) {
1098         /*
1099          * WQ was full, so queue nvmewqeq to be sent after
1100          * WQE release CQE
1101          */
1102         ctxp->flag |= LPFC_NVME_DEFER_WQFULL;
1103         wq = ctxp->hdwq->io_wq;
1104         pring = wq->pring;
1105         spin_lock_irqsave(&pring->ring_lock, iflags);
1106         list_add_tail(&nvmewqeq->list, &wq->wqfull_list);
1107         wq->q_flag |= HBA_NVMET_WQFULL;
1108         spin_unlock_irqrestore(&pring->ring_lock, iflags);
1109         atomic_inc(&lpfc_nvmep->defer_wqfull);
1110         return 0;
1111     }
1112
1113     /* Give back resources */
1114     atomic_inc(&lpfc_nvmep->xmt_fcp_drop);
1115     lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1116             "6153 FCP Drop IO x%x: Issue: %d\n",
1117             ctxp->oxid, rc);
1118
1119     ctxp->wqeq->hba_wqidx = 0;
1120     nvmewqeq->context_un.axchg = NULL;
1121     nvmewqeq->bpl_dmabuf = NULL;
1122     rc = -EBUSY;
1123 aerr:
1124     return rc;
1125 }
1126
1127 static void
1128 lpfc_nvmet_targetport_delete(struct nvmet_fc_target_port *targetport)
1129 {
1130     struct lpfc_nvmet_tgtport *tport = targetport->private;
1131
1132     /* release any threads waiting for the unreg to complete */
1133     if (tport->phba->targetport)
1134         complete(tport->tport_unreg_cmp);
1135 }
1136
1137 static void
1138 lpfc_nvmet_xmt_fcp_abort(struct nvmet_fc_target_port *tgtport,
1139              struct nvmefc_tgt_fcp_req *req)
1140 {
1141     struct lpfc_nvmet_tgtport *lpfc_nvmep = tgtport->private;
1142     struct lpfc_async_xchg_ctx *ctxp =
1143         container_of(req, struct lpfc_async_xchg_ctx, hdlrctx.fcp_req);
1144     struct lpfc_hba *phba = ctxp->phba;
1145     struct lpfc_queue *wq;
1146     unsigned long flags;
1147
1148     if (phba->pport->load_flag & FC_UNLOADING)
1149         return;
1150
1151     if (!ctxp->hdwq)
1152         ctxp->hdwq = &phba->sli4_hba.hdwq[0];
1153
1154     lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1155             "6103 NVMET Abort op: oxid x%x flg x%x ste %d\n",
1156             ctxp->oxid, ctxp->flag, ctxp->state);
1157
1158     lpfc_nvmeio_data(phba, "NVMET FCP ABRT: xri x%x flg x%x ste x%x\n",
1159              ctxp->oxid, ctxp->flag, ctxp->state);
1160
1161     atomic_inc(&lpfc_nvmep->xmt_fcp_abort);
1162
1163     spin_lock_irqsave(&ctxp->ctxlock, flags);
1164
1165     /* Since iaab/iaar are NOT set, we need to check
1166      * if the firmware is in process of aborting IO
1167      */
1168     if (ctxp->flag & (LPFC_NVME_XBUSY | LPFC_NVME_ABORT_OP)) {
1169         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
1170         return;
1171     }
1172     ctxp->flag |= LPFC_NVME_ABORT_OP;
1173
1174     if (ctxp->flag & LPFC_NVME_DEFER_WQFULL) {
1175         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
1176         lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid,
1177                          ctxp->oxid);
1178         wq = ctxp->hdwq->io_wq;
1179         lpfc_nvmet_wqfull_flush(phba, wq, ctxp);
1180         return;
1181     }
1182     spin_unlock_irqrestore(&ctxp->ctxlock, flags);
1183
1184     /* A state of LPFC_NVME_STE_RCV means we have just received
1185      * the NVME command and have not started processing it.
1186      * (by issuing any IO WQEs on this exchange yet)
1187      */
1188     if (ctxp->state == LPFC_NVME_STE_RCV)
1189         lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid,
1190                          ctxp->oxid);
1191     else
1192         lpfc_nvmet_sol_fcp_issue_abort(phba, ctxp, ctxp->sid,
1193                            ctxp->oxid);
1194 }
1195
1196 static void
1197 lpfc_nvmet_xmt_fcp_release(struct nvmet_fc_target_port *tgtport,
1198                struct nvmefc_tgt_fcp_req *rsp)
1199 {
1200     struct lpfc_nvmet_tgtport *lpfc_nvmep = tgtport->private;
1201     struct lpfc_async_xchg_ctx *ctxp =
1202         container_of(rsp, struct lpfc_async_xchg_ctx, hdlrctx.fcp_req);
1203     struct lpfc_hba *phba = ctxp->phba;
1204     unsigned long flags;
1205     bool aborting = false;
1206
1207     spin_lock_irqsave(&ctxp->ctxlock, flags);
1208     if (ctxp->flag & LPFC_NVME_XBUSY)
1209         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
1210                 "6027 NVMET release with XBUSY flag x%x"
1211                 " oxid x%x\n",
1212                 ctxp->flag, ctxp->oxid);
1213     else if (ctxp->state != LPFC_NVME_STE_DONE &&
1214          ctxp->state != LPFC_NVME_STE_ABORT)
1215         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1216                 "6413 NVMET release bad state %d %d oxid x%x\n",
1217                 ctxp->state, ctxp->entry_cnt, ctxp->oxid);
1218
1219     if ((ctxp->flag & LPFC_NVME_ABORT_OP) ||
1220         (ctxp->flag & LPFC_NVME_XBUSY)) {
1221         aborting = true;
1222         /* let the abort path do the real release */
1223         lpfc_nvmet_defer_release(phba, ctxp);
1224     }
1225     spin_unlock_irqrestore(&ctxp->ctxlock, flags);
1226
1227     lpfc_nvmeio_data(phba, "NVMET FCP FREE: xri x%x ste %d abt %d\n", ctxp->oxid,
1228              ctxp->state, aborting);
1229
1230     atomic_inc(&lpfc_nvmep->xmt_fcp_release);
1231     ctxp->flag &= ~LPFC_NVME_TNOTIFY;
1232
1233     if (aborting)
1234         return;
1235
1236     lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
1237 }
1238
1239 static void
1240 lpfc_nvmet_defer_rcv(struct nvmet_fc_target_port *tgtport,
1241              struct nvmefc_tgt_fcp_req *rsp)
1242 {
1243     struct lpfc_nvmet_tgtport *tgtp;
1244     struct lpfc_async_xchg_ctx *ctxp =
1245         container_of(rsp, struct lpfc_async_xchg_ctx, hdlrctx.fcp_req);
1246     struct rqb_dmabuf *nvmebuf = ctxp->rqb_buffer;
1247     struct lpfc_hba *phba = ctxp->phba;
1248     unsigned long iflag;
1249
1250
1251     lpfc_nvmeio_data(phba, "NVMET DEFERRCV: xri x%x sz %d CPU %02x\n",
1252              ctxp->oxid, ctxp->size, raw_smp_processor_id());
1253
1254     if (!nvmebuf) {
1255         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
1256                 "6425 Defer rcv: no buffer oxid x%x: "
1257                 "flg %x ste %x\n",
1258                 ctxp->oxid, ctxp->flag, ctxp->state);
1259         return;
1260     }
1261
1262     tgtp = phba->targetport->private;
1263     if (tgtp)
1264         atomic_inc(&tgtp->rcv_fcp_cmd_defer);
1265
1266     /* Free the nvmebuf since a new buffer already replaced it */
1267     nvmebuf->hrq->rqbp->rqb_free_buffer(phba, nvmebuf);
1268     spin_lock_irqsave(&ctxp->ctxlock, iflag);
1269     ctxp->rqb_buffer = NULL;
1270     spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1271 }
1272
1273 /**
1274  * lpfc_nvmet_ls_req_cmp - completion handler for a nvme ls request
1275  * @phba: Pointer to HBA context object
1276  * @cmdwqe: Pointer to driver command WQE object.
1277  * @rspwqe: Pointer to driver response WQE object.
1278  *
1279  * This function is the completion handler for NVME LS requests.
1280  * The function updates any states and statistics, then calls the
1281  * generic completion handler to finish completion of the request.
1282  **/
1283 static void
1284 lpfc_nvmet_ls_req_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
1285               struct lpfc_iocbq *rspwqe)
1286 {
1287     struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
1288     __lpfc_nvme_ls_req_cmp(phba, cmdwqe->vport, cmdwqe, wcqe);
1289 }
1290
1291 /**
1292  * lpfc_nvmet_ls_req - Issue an Link Service request
1293  * @targetport: pointer to target instance registered with nvmet transport.
1294  * @hosthandle: hosthandle set by the driver in a prior ls_rqst_rcv.
1295  *               Driver sets this value to the ndlp pointer.
1296  * @pnvme_lsreq: the transport nvme_ls_req structure for the LS
1297  *
1298  * Driver registers this routine to handle any link service request
1299  * from the nvme_fc transport to a remote nvme-aware port.
1300  *
1301  * Return value :
1302  *   0 - Success
1303  *   non-zero: various error codes, in form of -Exxx
1304  **/
1305 static int
1306 lpfc_nvmet_ls_req(struct nvmet_fc_target_port *targetport,
1307           void *hosthandle,
1308           struct nvmefc_ls_req *pnvme_lsreq)
1309 {
1310     struct lpfc_nvmet_tgtport *lpfc_nvmet = targetport->private;
1311     struct lpfc_hba *phba;
1312     struct lpfc_nodelist *ndlp;
1313     int ret;
1314     u32 hstate;
1315
1316     if (!lpfc_nvmet)
1317         return -EINVAL;
1318
1319     phba = lpfc_nvmet->phba;
1320     if (phba->pport->load_flag & FC_UNLOADING)
1321         return -EINVAL;
1322
1323     hstate = atomic_read(&lpfc_nvmet->state);
1324     if (hstate == LPFC_NVMET_INV_HOST_ACTIVE)
1325         return -EACCES;
1326
1327     ndlp = (struct lpfc_nodelist *)hosthandle;
1328
1329     ret = __lpfc_nvme_ls_req(phba->pport, ndlp, pnvme_lsreq,
1330                  lpfc_nvmet_ls_req_cmp);
1331
1332     return ret;
1333 }
1334
1335 /**
1336  * lpfc_nvmet_ls_abort - Abort a prior NVME LS request
1337  * @targetport: Transport targetport, that LS was issued from.
1338  * @hosthandle: hosthandle set by the driver in a prior ls_rqst_rcv.
1339  *               Driver sets this value to the ndlp pointer.
1340  * @pnvme_lsreq: the transport nvme_ls_req structure for LS to be aborted
1341  *
1342  * Driver registers this routine to abort an NVME LS request that is
1343  * in progress (from the transports perspective).
1344  **/
1345 static void
1346 lpfc_nvmet_ls_abort(struct nvmet_fc_target_port *targetport,
1347             void *hosthandle,
1348             struct nvmefc_ls_req *pnvme_lsreq)
1349 {
1350     struct lpfc_nvmet_tgtport *lpfc_nvmet = targetport->private;
1351     struct lpfc_hba *phba;
1352     struct lpfc_nodelist *ndlp;
1353     int ret;
1354
1355     phba = lpfc_nvmet->phba;
1356     if (phba->pport->load_flag & FC_UNLOADING)
1357         return;
1358
1359     ndlp = (struct lpfc_nodelist *)hosthandle;
1360
1361     ret = __lpfc_nvme_ls_abort(phba->pport, ndlp, pnvme_lsreq);
1362     if (!ret)
1363         atomic_inc(&lpfc_nvmet->xmt_ls_abort);
1364 }
1365
1366 static void
1367 lpfc_nvmet_host_release(void *hosthandle)
1368 {
1369     struct lpfc_nodelist *ndlp = hosthandle;
1370     struct lpfc_hba *phba = ndlp->phba;
1371     struct lpfc_nvmet_tgtport *tgtp;
1372
1373     if (!phba->targetport || !phba->targetport->private)
1374         return;
1375
1376     lpfc_printf_log(phba, KERN_ERR, LOG_NVME,
1377             "6202 NVMET XPT releasing hosthandle x%px "
1378             "DID x%x xflags x%x refcnt %d\n",
1379             hosthandle, ndlp->nlp_DID, ndlp->fc4_xpt_flags,
1380             kref_read(&ndlp->kref));
1381     tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
1382     spin_lock_irq(&ndlp->lock);
1383     ndlp->fc4_xpt_flags &= ~NLP_XPT_HAS_HH;
1384     spin_unlock_irq(&ndlp->lock);
1385     lpfc_nlp_put(ndlp);
1386     atomic_set(&tgtp->state, 0);
1387 }
1388
1389 static void
1390 lpfc_nvmet_discovery_event(struct nvmet_fc_target_port *tgtport)
1391 {
1392     struct lpfc_nvmet_tgtport *tgtp;
1393     struct lpfc_hba *phba;
1394     uint32_t rc;
1395
1396     tgtp = tgtport->private;
1397     phba = tgtp->phba;
1398
1399     rc = lpfc_issue_els_rscn(phba->pport, 0);
1400     lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1401             "6420 NVMET subsystem change: Notification %s\n",
1402             (rc) ? "Failed" : "Sent");
1403 }
1404
1405 static struct nvmet_fc_target_template lpfc_tgttemplate = {
1406     .targetport_delete = lpfc_nvmet_targetport_delete,
1407     .xmt_ls_rsp     = lpfc_nvmet_xmt_ls_rsp,
1408     .fcp_op         = lpfc_nvmet_xmt_fcp_op,
1409     .fcp_abort      = lpfc_nvmet_xmt_fcp_abort,
1410     .fcp_req_release = lpfc_nvmet_xmt_fcp_release,
1411     .defer_rcv  = lpfc_nvmet_defer_rcv,
1412     .discovery_event = lpfc_nvmet_discovery_event,
1413     .ls_req         = lpfc_nvmet_ls_req,
1414     .ls_abort       = lpfc_nvmet_ls_abort,
1415     .host_release   = lpfc_nvmet_host_release,
1416
1417     .max_hw_queues  = 1,
1418     .max_sgl_segments = LPFC_NVMET_DEFAULT_SEGS,
1419     .max_dif_sgl_segments = LPFC_NVMET_DEFAULT_SEGS,
1420     .dma_boundary = 0xFFFFFFFF,
1421
1422     /* optional features */
1423     .target_features = 0,
1424     /* sizes of additional private data for data structures */
1425     .target_priv_sz = sizeof(struct lpfc_nvmet_tgtport),
1426     .lsrqst_priv_sz = 0,
1427 };
1428
1429 static void
1430 __lpfc_nvmet_clean_io_for_cpu(struct lpfc_hba *phba,
1431         struct lpfc_nvmet_ctx_info *infop)
1432 {
1433     struct lpfc_nvmet_ctxbuf *ctx_buf, *next_ctx_buf;
1434     unsigned long flags;
1435
1436     spin_lock_irqsave(&infop->nvmet_ctx_list_lock, flags);
1437     list_for_each_entry_safe(ctx_buf, next_ctx_buf,
1438                 &infop->nvmet_ctx_list, list) {
1439         spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1440         list_del_init(&ctx_buf->list);
1441         spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1442
1443         spin_lock(&phba->hbalock);
1444         __lpfc_clear_active_sglq(phba, ctx_buf->sglq->sli4_lxritag);
1445         spin_unlock(&phba->hbalock);
1446
1447         ctx_buf->sglq->state = SGL_FREED;
1448         ctx_buf->sglq->ndlp = NULL;
1449
1450         spin_lock(&phba->sli4_hba.sgl_list_lock);
1451         list_add_tail(&ctx_buf->sglq->list,
1452                 &phba->sli4_hba.lpfc_nvmet_sgl_list);
1453         spin_unlock(&phba->sli4_hba.sgl_list_lock);
1454
1455         lpfc_sli_release_iocbq(phba, ctx_buf->iocbq);
1456         kfree(ctx_buf->context);
1457     }
1458     spin_unlock_irqrestore(&infop->nvmet_ctx_list_lock, flags);
1459 }
1460
1461 static void
1462 lpfc_nvmet_cleanup_io_context(struct lpfc_hba *phba)
1463 {
1464     struct lpfc_nvmet_ctx_info *infop;
1465     int i, j;
1466
1467     /* The first context list, MRQ 0 CPU 0 */
1468     infop = phba->sli4_hba.nvmet_ctx_info;
1469     if (!infop)
1470         return;
1471
1472     /* Cycle the the entire CPU context list for every MRQ */
1473     for (i = 0; i < phba->cfg_nvmet_mrq; i++) {
1474         for_each_present_cpu(j) {
1475             infop = lpfc_get_ctx_list(phba, j, i);
1476             __lpfc_nvmet_clean_io_for_cpu(phba, infop);
1477         }
1478     }
1479     kfree(phba->sli4_hba.nvmet_ctx_info);
1480     phba->sli4_hba.nvmet_ctx_info = NULL;
1481 }
1482
1483 static int
1484 lpfc_nvmet_setup_io_context(struct lpfc_hba *phba)
1485 {
1486     struct lpfc_nvmet_ctxbuf *ctx_buf;
1487     struct lpfc_iocbq *nvmewqe;
1488     union lpfc_wqe128 *wqe;
1489     struct lpfc_nvmet_ctx_info *last_infop;
1490     struct lpfc_nvmet_ctx_info *infop;
1491     int i, j, idx, cpu;
1492
1493     lpfc_printf_log(phba, KERN_INFO, LOG_NVME,
1494             "6403 Allocate NVMET resources for %d XRIs\n",
1495             phba->sli4_hba.nvmet_xri_cnt);
1496
1497     phba->sli4_hba.nvmet_ctx_info = kcalloc(
1498         phba->sli4_hba.num_possible_cpu * phba->cfg_nvmet_mrq,
1499         sizeof(struct lpfc_nvmet_ctx_info), GFP_KERNEL);
1500     if (!phba->sli4_hba.nvmet_ctx_info) {
1501         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1502                 "6419 Failed allocate memory for "
1503                 "nvmet context lists\n");
1504         return -ENOMEM;
1505     }
1506
1507     /*
1508      * Assuming X CPUs in the system, and Y MRQs, allocate some
1509      * lpfc_nvmet_ctx_info structures as follows:
1510      *
1511      * cpu0/mrq0 cpu1/mrq0 ... cpuX/mrq0
1512      * cpu0/mrq1 cpu1/mrq1 ... cpuX/mrq1
1513      * ...
1514      * cpuX/mrqY cpuX/mrqY ... cpuX/mrqY
1515      *
1516      * Each line represents a MRQ "silo" containing an entry for
1517      * every CPU.
1518      *
1519      * MRQ X is initially assumed to be associated with CPU X, thus
1520      * contexts are initially distributed across all MRQs using
1521      * the MRQ index (N) as follows cpuN/mrqN. When contexts are
1522      * freed, the are freed to the MRQ silo based on the CPU number
1523      * of the IO completion. Thus a context that was allocated for MRQ A
1524      * whose IO completed on CPU B will be freed to cpuB/mrqA.
1525      */
1526     for_each_possible_cpu(i) {
1527         for (j = 0; j < phba->cfg_nvmet_mrq; j++) {
1528             infop = lpfc_get_ctx_list(phba, i, j);
1529             INIT_LIST_HEAD(&infop->nvmet_ctx_list);
1530             spin_lock_init(&infop->nvmet_ctx_list_lock);
1531             infop->nvmet_ctx_list_cnt = 0;
1532         }
1533     }
1534
1535     /*
1536      * Setup the next CPU context info ptr for each MRQ.
1537      * MRQ 0 will cycle thru CPUs 0 - X separately from
1538      * MRQ 1 cycling thru CPUs 0 - X, and so on.
1539      */
1540     for (j = 0; j < phba->cfg_nvmet_mrq; j++) {
1541         last_infop = lpfc_get_ctx_list(phba,
1542                            cpumask_first(cpu_present_mask),
1543                            j);
1544         for (i = phba->sli4_hba.num_possible_cpu - 1;  i >= 0; i--) {
1545             infop = lpfc_get_ctx_list(phba, i, j);
1546             infop->nvmet_ctx_next_cpu = last_infop;
1547             last_infop = infop;
1548         }
1549     }
1550
1551     /* For all nvmet xris, allocate resources needed to process a
1552      * received command on a per xri basis.
1553      */
1554     idx = 0;
1555     cpu = cpumask_first(cpu_present_mask);
1556     for (i = 0; i < phba->sli4_hba.nvmet_xri_cnt; i++) {
1557         ctx_buf = kzalloc(sizeof(*ctx_buf), GFP_KERNEL);
1558         if (!ctx_buf) {
1559             lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1560                     "6404 Ran out of memory for NVMET\n");
1561             return -ENOMEM;
1562         }
1563
1564         ctx_buf->context = kzalloc(sizeof(*ctx_buf->context),
1565                        GFP_KERNEL);
1566         if (!ctx_buf->context) {
1567             kfree(ctx_buf);
1568             lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1569                     "6405 Ran out of NVMET "
1570                     "context memory\n");
1571             return -ENOMEM;
1572         }
1573         ctx_buf->context->ctxbuf = ctx_buf;
1574         ctx_buf->context->state = LPFC_NVME_STE_FREE;
1575
1576         ctx_buf->iocbq = lpfc_sli_get_iocbq(phba);
1577         if (!ctx_buf->iocbq) {
1578             kfree(ctx_buf->context);
1579             kfree(ctx_buf);
1580             lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1581                     "6406 Ran out of NVMET iocb/WQEs\n");
1582             return -ENOMEM;
1583         }
1584         ctx_buf->iocbq->cmd_flag = LPFC_IO_NVMET;
1585         nvmewqe = ctx_buf->iocbq;
1586         wqe = &nvmewqe->wqe;
1587
1588         /* Initialize WQE */
1589         memset(wqe, 0, sizeof(union lpfc_wqe));
1590
1591         ctx_buf->iocbq->cmd_dmabuf = NULL;
1592         spin_lock(&phba->sli4_hba.sgl_list_lock);
1593         ctx_buf->sglq = __lpfc_sli_get_nvmet_sglq(phba, ctx_buf->iocbq);
1594         spin_unlock(&phba->sli4_hba.sgl_list_lock);
1595         if (!ctx_buf->sglq) {
1596             lpfc_sli_release_iocbq(phba, ctx_buf->iocbq);
1597             kfree(ctx_buf->context);
1598             kfree(ctx_buf);
1599             lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1600                     "6407 Ran out of NVMET XRIs\n");
1601             return -ENOMEM;
1602         }
1603         INIT_WORK(&ctx_buf->defer_work, lpfc_nvmet_fcp_rqst_defer_work);
1604
1605         /*
1606          * Add ctx to MRQidx context list. Our initial assumption
1607          * is MRQidx will be associated with CPUidx. This association
1608          * can change on the fly.
1609          */
1610         infop = lpfc_get_ctx_list(phba, cpu, idx);
1611         spin_lock(&infop->nvmet_ctx_list_lock);
1612         list_add_tail(&ctx_buf->list, &infop->nvmet_ctx_list);
1613         infop->nvmet_ctx_list_cnt++;
1614         spin_unlock(&infop->nvmet_ctx_list_lock);
1615
1616         /* Spread ctx structures evenly across all MRQs */
1617         idx++;
1618         if (idx >= phba->cfg_nvmet_mrq) {
1619             idx = 0;
1620             cpu = cpumask_first(cpu_present_mask);
1621             continue;
1622         }
1623         cpu = cpumask_next(cpu, cpu_present_mask);
1624         if (cpu == nr_cpu_ids)
1625             cpu = cpumask_first(cpu_present_mask);
1626
1627     }
1628
1629     for_each_present_cpu(i) {
1630         for (j = 0; j < phba->cfg_nvmet_mrq; j++) {
1631             infop = lpfc_get_ctx_list(phba, i, j);
1632             lpfc_printf_log(phba, KERN_INFO, LOG_NVME | LOG_INIT,
1633                     "6408 TOTAL NVMET ctx for CPU %d "
1634                     "MRQ %d: cnt %d nextcpu x%px\n",
1635                     i, j, infop->nvmet_ctx_list_cnt,
1636                     infop->nvmet_ctx_next_cpu);
1637         }
1638     }
1639     return 0;
1640 }
1641
1642 int
1643 lpfc_nvmet_create_targetport(struct lpfc_hba *phba)
1644 {
1645     struct lpfc_vport  *vport = phba->pport;
1646     struct lpfc_nvmet_tgtport *tgtp;
1647     struct nvmet_fc_port_info pinfo;
1648     int error;
1649
1650     if (phba->targetport)
1651         return 0;
1652
1653     error = lpfc_nvmet_setup_io_context(phba);
1654     if (error)
1655         return error;
1656
1657     memset(&pinfo, 0, sizeof(struct nvmet_fc_port_info));
1658     pinfo.node_name = wwn_to_u64(vport->fc_nodename.u.wwn);
1659     pinfo.port_name = wwn_to_u64(vport->fc_portname.u.wwn);
1660     pinfo.port_id = vport->fc_myDID;
1661
1662     /* We need to tell the transport layer + 1 because it takes page
1663      * alignment into account. When space for the SGL is allocated we
1664      * allocate + 3, one for cmd, one for rsp and one for this alignment
1665      */
1666     lpfc_tgttemplate.max_sgl_segments = phba->cfg_nvme_seg_cnt + 1;
1667     lpfc_tgttemplate.max_hw_queues = phba->cfg_hdw_queue;
1668     lpfc_tgttemplate.target_features = NVMET_FCTGTFEAT_READDATA_RSP;
1669
1670 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
1671     error = nvmet_fc_register_targetport(&pinfo, &lpfc_tgttemplate,
1672                          &phba->pcidev->dev,
1673                          &phba->targetport);
1674 #else
1675     error = -ENOENT;
1676 #endif
1677     if (error) {
1678         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
1679                 "6025 Cannot register NVME targetport x%x: "
1680                 "portnm %llx nodenm %llx segs %d qs %d\n",
1681                 error,
1682                 pinfo.port_name, pinfo.node_name,
1683                 lpfc_tgttemplate.max_sgl_segments,
1684                 lpfc_tgttemplate.max_hw_queues);
1685         phba->targetport = NULL;
1686         phba->nvmet_support = 0;
1687
1688         lpfc_nvmet_cleanup_io_context(phba);
1689
1690     } else {
1691         tgtp = (struct lpfc_nvmet_tgtport *)
1692             phba->targetport->private;
1693         tgtp->phba = phba;
1694
1695         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
1696                 "6026 Registered NVME "
1697                 "targetport: x%px, private x%px "
1698                 "portnm %llx nodenm %llx segs %d qs %d\n",
1699                 phba->targetport, tgtp,
1700                 pinfo.port_name, pinfo.node_name,
1701                 lpfc_tgttemplate.max_sgl_segments,
1702                 lpfc_tgttemplate.max_hw_queues);
1703
1704         atomic_set(&tgtp->rcv_ls_req_in, 0);
1705         atomic_set(&tgtp->rcv_ls_req_out, 0);
1706         atomic_set(&tgtp->rcv_ls_req_drop, 0);
1707         atomic_set(&tgtp->xmt_ls_abort, 0);
1708         atomic_set(&tgtp->xmt_ls_abort_cmpl, 0);
1709         atomic_set(&tgtp->xmt_ls_rsp, 0);
1710         atomic_set(&tgtp->xmt_ls_drop, 0);
1711         atomic_set(&tgtp->xmt_ls_rsp_error, 0);
1712         atomic_set(&tgtp->xmt_ls_rsp_xb_set, 0);
1713         atomic_set(&tgtp->xmt_ls_rsp_aborted, 0);
1714         atomic_set(&tgtp->xmt_ls_rsp_cmpl, 0);
1715         atomic_set(&tgtp->rcv_fcp_cmd_in, 0);
1716         atomic_set(&tgtp->rcv_fcp_cmd_out, 0);
1717         atomic_set(&tgtp->rcv_fcp_cmd_drop, 0);
1718         atomic_set(&tgtp->xmt_fcp_drop, 0);
1719         atomic_set(&tgtp->xmt_fcp_read_rsp, 0);
1720         atomic_set(&tgtp->xmt_fcp_read, 0);
1721         atomic_set(&tgtp->xmt_fcp_write, 0);
1722         atomic_set(&tgtp->xmt_fcp_rsp, 0);
1723         atomic_set(&tgtp->xmt_fcp_release, 0);
1724         atomic_set(&tgtp->xmt_fcp_rsp_cmpl, 0);
1725         atomic_set(&tgtp->xmt_fcp_rsp_error, 0);
1726         atomic_set(&tgtp->xmt_fcp_rsp_xb_set, 0);
1727         atomic_set(&tgtp->xmt_fcp_rsp_aborted, 0);
1728         atomic_set(&tgtp->xmt_fcp_rsp_drop, 0);
1729         atomic_set(&tgtp->xmt_fcp_xri_abort_cqe, 0);
1730         atomic_set(&tgtp->xmt_fcp_abort, 0);
1731         atomic_set(&tgtp->xmt_fcp_abort_cmpl, 0);
1732         atomic_set(&tgtp->xmt_abort_unsol, 0);
1733         atomic_set(&tgtp->xmt_abort_sol, 0);
1734         atomic_set(&tgtp->xmt_abort_rsp, 0);
1735         atomic_set(&tgtp->xmt_abort_rsp_error, 0);
1736         atomic_set(&tgtp->defer_ctx, 0);
1737         atomic_set(&tgtp->defer_fod, 0);
1738         atomic_set(&tgtp->defer_wqfull, 0);
1739     }
1740     return error;
1741 }
1742
1743 int
1744 lpfc_nvmet_update_targetport(struct lpfc_hba *phba)
1745 {
1746     struct lpfc_vport  *vport = phba->pport;
1747
1748     if (!phba->targetport)
1749         return 0;
1750
1751     lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
1752              "6007 Update NVMET port x%px did x%x\n",
1753              phba->targetport, vport->fc_myDID);
1754
1755     phba->targetport->port_id = vport->fc_myDID;
1756     return 0;
1757 }
1758
1759 /**
1760  * lpfc_sli4_nvmet_xri_aborted - Fast-path process of nvmet xri abort
1761  * @phba: pointer to lpfc hba data structure.
1762  * @axri: pointer to the nvmet xri abort wcqe structure.
1763  *
1764  * This routine is invoked by the worker thread to process a SLI4 fast-path
1765  * NVMET aborted xri.
1766  **/
1767 void
1768 lpfc_sli4_nvmet_xri_aborted(struct lpfc_hba *phba,
1769                 struct sli4_wcqe_xri_aborted *axri)
1770 {
1771 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
1772     uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
1773     uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
1774     struct lpfc_async_xchg_ctx *ctxp, *next_ctxp;
1775     struct lpfc_nvmet_tgtport *tgtp;
1776     struct nvmefc_tgt_fcp_req *req = NULL;
1777     struct lpfc_nodelist *ndlp;
1778     unsigned long iflag = 0;
1779     int rrq_empty = 0;
1780     bool released = false;
1781
1782     lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1783             "6317 XB aborted xri x%x rxid x%x\n", xri, rxid);
1784
1785     if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_NVME))
1786         return;
1787
1788     if (phba->targetport) {
1789         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
1790         atomic_inc(&tgtp->xmt_fcp_xri_abort_cqe);
1791     }
1792
1793     spin_lock_irqsave(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1794     list_for_each_entry_safe(ctxp, next_ctxp,
1795                  &phba->sli4_hba.lpfc_abts_nvmet_ctx_list,
1796                  list) {
1797         if (ctxp->ctxbuf->sglq->sli4_xritag != xri)
1798             continue;
1799
1800         spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock,
1801                        iflag);
1802
1803         spin_lock_irqsave(&ctxp->ctxlock, iflag);
1804         /* Check if we already received a free context call
1805          * and we have completed processing an abort situation.
1806          */
1807         if (ctxp->flag & LPFC_NVME_CTX_RLS &&
1808             !(ctxp->flag & LPFC_NVME_ABORT_OP)) {
1809             spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1810             list_del_init(&ctxp->list);
1811             spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
1812             released = true;
1813         }
1814         ctxp->flag &= ~LPFC_NVME_XBUSY;
1815         spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1816
1817         rrq_empty = list_empty(&phba->active_rrq_list);
1818         ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
1819         if (ndlp &&
1820             (ndlp->nlp_state == NLP_STE_UNMAPPED_NODE ||
1821              ndlp->nlp_state == NLP_STE_MAPPED_NODE)) {
1822             lpfc_set_rrq_active(phba, ndlp,
1823                 ctxp->ctxbuf->sglq->sli4_lxritag,
1824                 rxid, 1);
1825             lpfc_sli4_abts_err_handler(phba, ndlp, axri);
1826         }
1827
1828         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1829                 "6318 XB aborted oxid x%x flg x%x (%x)\n",
1830                 ctxp->oxid, ctxp->flag, released);
1831         if (released)
1832             lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
1833
1834         if (rrq_empty)
1835             lpfc_worker_wake_up(phba);
1836         return;
1837     }
1838     spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1839     ctxp = lpfc_nvmet_get_ctx_for_xri(phba, xri);
1840     if (ctxp) {
1841         /*
1842          *  Abort already done by FW, so BA_ACC sent.
1843          *  However, the transport may be unaware.
1844          */
1845         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1846                 "6323 NVMET Rcv ABTS xri x%x ctxp state x%x "
1847                 "flag x%x oxid x%x rxid x%x\n",
1848                 xri, ctxp->state, ctxp->flag, ctxp->oxid,
1849                 rxid);
1850
1851         spin_lock_irqsave(&ctxp->ctxlock, iflag);
1852         ctxp->flag |= LPFC_NVME_ABTS_RCV;
1853         ctxp->state = LPFC_NVME_STE_ABORT;
1854         spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1855
1856         lpfc_nvmeio_data(phba,
1857                  "NVMET ABTS RCV: xri x%x CPU %02x rjt %d\n",
1858                  xri, raw_smp_processor_id(), 0);
1859
1860         req = &ctxp->hdlrctx.fcp_req;
1861         if (req)
1862             nvmet_fc_rcv_fcp_abort(phba->targetport, req);
1863     }
1864 #endif
1865 }
1866
1867 int
1868 lpfc_nvmet_rcv_unsol_abort(struct lpfc_vport *vport,
1869                struct fc_frame_header *fc_hdr)
1870 {
1871 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
1872     struct lpfc_hba *phba = vport->phba;
1873     struct lpfc_async_xchg_ctx *ctxp, *next_ctxp;
1874     struct nvmefc_tgt_fcp_req *rsp;
1875     uint32_t sid;
1876     uint16_t oxid, xri;
1877     unsigned long iflag = 0;
1878
1879     sid = sli4_sid_from_fc_hdr(fc_hdr);
1880     oxid = be16_to_cpu(fc_hdr->fh_ox_id);
1881
1882     spin_lock_irqsave(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1883     list_for_each_entry_safe(ctxp, next_ctxp,
1884                  &phba->sli4_hba.lpfc_abts_nvmet_ctx_list,
1885                  list) {
1886         if (ctxp->oxid != oxid || ctxp->sid != sid)
1887             continue;
1888
1889         xri = ctxp->ctxbuf->sglq->sli4_xritag;
1890
1891         spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock,
1892                        iflag);
1893         spin_lock_irqsave(&ctxp->ctxlock, iflag);
1894         ctxp->flag |= LPFC_NVME_ABTS_RCV;
1895         spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1896
1897         lpfc_nvmeio_data(phba,
1898             "NVMET ABTS RCV: xri x%x CPU %02x rjt %d\n",
1899             xri, raw_smp_processor_id(), 0);
1900
1901         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1902                 "6319 NVMET Rcv ABTS:acc xri x%x\n", xri);
1903
1904         rsp = &ctxp->hdlrctx.fcp_req;
1905         nvmet_fc_rcv_fcp_abort(phba->targetport, rsp);
1906
1907         /* Respond with BA_ACC accordingly */
1908         lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 1);
1909         return 0;
1910     }
1911     spin_unlock_irqrestore(&phba->sli4_hba.abts_nvmet_buf_list_lock, iflag);
1912     /* check the wait list */
1913     if (phba->sli4_hba.nvmet_io_wait_cnt) {
1914         struct rqb_dmabuf *nvmebuf;
1915         struct fc_frame_header *fc_hdr_tmp;
1916         u32 sid_tmp;
1917         u16 oxid_tmp;
1918         bool found = false;
1919
1920         spin_lock_irqsave(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
1921
1922         /* match by oxid and s_id */
1923         list_for_each_entry(nvmebuf,
1924                     &phba->sli4_hba.lpfc_nvmet_io_wait_list,
1925                     hbuf.list) {
1926             fc_hdr_tmp = (struct fc_frame_header *)
1927                     (nvmebuf->hbuf.virt);
1928             oxid_tmp = be16_to_cpu(fc_hdr_tmp->fh_ox_id);
1929             sid_tmp = sli4_sid_from_fc_hdr(fc_hdr_tmp);
1930             if (oxid_tmp != oxid || sid_tmp != sid)
1931                 continue;
1932
1933             lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1934                     "6321 NVMET Rcv ABTS oxid x%x from x%x "
1935                     "is waiting for a ctxp\n",
1936                     oxid, sid);
1937
1938             list_del_init(&nvmebuf->hbuf.list);
1939             phba->sli4_hba.nvmet_io_wait_cnt--;
1940             found = true;
1941             break;
1942         }
1943         spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock,
1944                        iflag);
1945
1946         /* free buffer since already posted a new DMA buffer to RQ */
1947         if (found) {
1948             nvmebuf->hrq->rqbp->rqb_free_buffer(phba, nvmebuf);
1949             /* Respond with BA_ACC accordingly */
1950             lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 1);
1951             return 0;
1952         }
1953     }
1954
1955     /* check active list */
1956     ctxp = lpfc_nvmet_get_ctx_for_oxid(phba, oxid, sid);
1957     if (ctxp) {
1958         xri = ctxp->ctxbuf->sglq->sli4_xritag;
1959
1960         spin_lock_irqsave(&ctxp->ctxlock, iflag);
1961         ctxp->flag |= (LPFC_NVME_ABTS_RCV | LPFC_NVME_ABORT_OP);
1962         spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1963
1964         lpfc_nvmeio_data(phba,
1965                  "NVMET ABTS RCV: xri x%x CPU %02x rjt %d\n",
1966                  xri, raw_smp_processor_id(), 0);
1967
1968         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1969                 "6322 NVMET Rcv ABTS:acc oxid x%x xri x%x "
1970                 "flag x%x state x%x\n",
1971                 ctxp->oxid, xri, ctxp->flag, ctxp->state);
1972
1973         if (ctxp->flag & LPFC_NVME_TNOTIFY) {
1974             /* Notify the transport */
1975             nvmet_fc_rcv_fcp_abort(phba->targetport,
1976                            &ctxp->hdlrctx.fcp_req);
1977         } else {
1978             cancel_work_sync(&ctxp->ctxbuf->defer_work);
1979             spin_lock_irqsave(&ctxp->ctxlock, iflag);
1980             lpfc_nvmet_defer_release(phba, ctxp);
1981             spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
1982         }
1983         lpfc_nvmet_sol_fcp_issue_abort(phba, ctxp, ctxp->sid,
1984                            ctxp->oxid);
1985
1986         lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 1);
1987         return 0;
1988     }
1989
1990     lpfc_nvmeio_data(phba, "NVMET ABTS RCV: oxid x%x CPU %02x rjt %d\n",
1991              oxid, raw_smp_processor_id(), 1);
1992
1993     lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
1994             "6320 NVMET Rcv ABTS:rjt oxid x%x\n", oxid);
1995
1996     /* Respond with BA_RJT accordingly */
1997     lpfc_sli4_seq_abort_rsp(vport, fc_hdr, 0);
1998 #endif
1999     return 0;
2000 }
2001
2002 static void
2003 lpfc_nvmet_wqfull_flush(struct lpfc_hba *phba, struct lpfc_queue *wq,
2004             struct lpfc_async_xchg_ctx *ctxp)
2005 {
2006     struct lpfc_sli_ring *pring;
2007     struct lpfc_iocbq *nvmewqeq;
2008     struct lpfc_iocbq *next_nvmewqeq;
2009     unsigned long iflags;
2010     struct lpfc_wcqe_complete wcqe;
2011     struct lpfc_wcqe_complete *wcqep;
2012
2013     pring = wq->pring;
2014     wcqep = &wcqe;
2015
2016     /* Fake an ABORT error code back to cmpl routine */
2017     memset(wcqep, 0, sizeof(struct lpfc_wcqe_complete));
2018     bf_set(lpfc_wcqe_c_status, wcqep, IOSTAT_LOCAL_REJECT);
2019     wcqep->parameter = IOERR_ABORT_REQUESTED;
2020
2021     spin_lock_irqsave(&pring->ring_lock, iflags);
2022     list_for_each_entry_safe(nvmewqeq, next_nvmewqeq,
2023                  &wq->wqfull_list, list) {
2024         if (ctxp) {
2025             /* Checking for a specific IO to flush */
2026             if (nvmewqeq->context_un.axchg == ctxp) {
2027                 list_del(&nvmewqeq->list);
2028                 spin_unlock_irqrestore(&pring->ring_lock,
2029                                iflags);
2030                 memcpy(&nvmewqeq->wcqe_cmpl, wcqep,
2031                        sizeof(*wcqep));
2032                 lpfc_nvmet_xmt_fcp_op_cmp(phba, nvmewqeq,
2033                               nvmewqeq);
2034                 return;
2035             }
2036             continue;
2037         } else {
2038             /* Flush all IOs */
2039             list_del(&nvmewqeq->list);
2040             spin_unlock_irqrestore(&pring->ring_lock, iflags);
2041             memcpy(&nvmewqeq->wcqe_cmpl, wcqep, sizeof(*wcqep));
2042             lpfc_nvmet_xmt_fcp_op_cmp(phba, nvmewqeq, nvmewqeq);
2043             spin_lock_irqsave(&pring->ring_lock, iflags);
2044         }
2045     }
2046     if (!ctxp)
2047         wq->q_flag &= ~HBA_NVMET_WQFULL;
2048     spin_unlock_irqrestore(&pring->ring_lock, iflags);
2049 }
2050
2051 void
2052 lpfc_nvmet_wqfull_process(struct lpfc_hba *phba,
2053               struct lpfc_queue *wq)
2054 {
2055 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2056     struct lpfc_sli_ring *pring;
2057     struct lpfc_iocbq *nvmewqeq;
2058     struct lpfc_async_xchg_ctx *ctxp;
2059     unsigned long iflags;
2060     int rc;
2061
2062     /*
2063      * Some WQE slots are available, so try to re-issue anything
2064      * on the WQ wqfull_list.
2065      */
2066     pring = wq->pring;
2067     spin_lock_irqsave(&pring->ring_lock, iflags);
2068     while (!list_empty(&wq->wqfull_list)) {
2069         list_remove_head(&wq->wqfull_list, nvmewqeq, struct lpfc_iocbq,
2070                  list);
2071         spin_unlock_irqrestore(&pring->ring_lock, iflags);
2072         ctxp = nvmewqeq->context_un.axchg;
2073         rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, nvmewqeq);
2074         spin_lock_irqsave(&pring->ring_lock, iflags);
2075         if (rc == -EBUSY) {
2076             /* WQ was full again, so put it back on the list */
2077             list_add(&nvmewqeq->list, &wq->wqfull_list);
2078             spin_unlock_irqrestore(&pring->ring_lock, iflags);
2079             return;
2080         }
2081         if (rc == WQE_SUCCESS) {
2082 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2083             if (ctxp->ts_cmd_nvme) {
2084                 if (ctxp->hdlrctx.fcp_req.op == NVMET_FCOP_RSP)
2085                     ctxp->ts_status_wqput = ktime_get_ns();
2086                 else
2087                     ctxp->ts_data_wqput = ktime_get_ns();
2088             }
2089 #endif
2090         } else {
2091             WARN_ON(rc);
2092         }
2093     }
2094     wq->q_flag &= ~HBA_NVMET_WQFULL;
2095     spin_unlock_irqrestore(&pring->ring_lock, iflags);
2096
2097 #endif
2098 }
2099
2100 void
2101 lpfc_nvmet_destroy_targetport(struct lpfc_hba *phba)
2102 {
2103 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2104     struct lpfc_nvmet_tgtport *tgtp;
2105     struct lpfc_queue *wq;
2106     uint32_t qidx;
2107     DECLARE_COMPLETION_ONSTACK(tport_unreg_cmp);
2108
2109     if (phba->nvmet_support == 0)
2110         return;
2111     if (phba->targetport) {
2112         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2113         for (qidx = 0; qidx < phba->cfg_hdw_queue; qidx++) {
2114             wq = phba->sli4_hba.hdwq[qidx].io_wq;
2115             lpfc_nvmet_wqfull_flush(phba, wq, NULL);
2116         }
2117         tgtp->tport_unreg_cmp = &tport_unreg_cmp;
2118         nvmet_fc_unregister_targetport(phba->targetport);
2119         if (!wait_for_completion_timeout(&tport_unreg_cmp,
2120                     msecs_to_jiffies(LPFC_NVMET_WAIT_TMO)))
2121             lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2122                     "6179 Unreg targetport x%px timeout "
2123                     "reached.\n", phba->targetport);
2124         lpfc_nvmet_cleanup_io_context(phba);
2125     }
2126     phba->targetport = NULL;
2127 #endif
2128 }
2129
2130 /**
2131  * lpfc_nvmet_handle_lsreq - Process an NVME LS request
2132  * @phba: pointer to lpfc hba data structure.
2133  * @axchg: pointer to exchange context for the NVME LS request
2134  *
2135  * This routine is used for processing an asychronously received NVME LS
2136  * request. Any remaining validation is done and the LS is then forwarded
2137  * to the nvmet-fc transport via nvmet_fc_rcv_ls_req().
2138  *
2139  * The calling sequence should be: nvmet_fc_rcv_ls_req() -> (processing)
2140  * -> lpfc_nvmet_xmt_ls_rsp/cmp -> req->done.
2141  * lpfc_nvme_xmt_ls_rsp_cmp should free the allocated axchg.
2142  *
2143  * Returns 0 if LS was handled and delivered to the transport
2144  * Returns 1 if LS failed to be handled and should be dropped
2145  */
2146 int
2147 lpfc_nvmet_handle_lsreq(struct lpfc_hba *phba,
2148             struct lpfc_async_xchg_ctx *axchg)
2149 {
2150 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2151     struct lpfc_nvmet_tgtport *tgtp = phba->targetport->private;
2152     uint32_t *payload = axchg->payload;
2153     int rc;
2154
2155     atomic_inc(&tgtp->rcv_ls_req_in);
2156
2157     /*
2158      * Driver passes the ndlp as the hosthandle argument allowing
2159      * the transport to generate LS requests for any associateions
2160      * that are created.
2161      */
2162     rc = nvmet_fc_rcv_ls_req(phba->targetport, axchg->ndlp, &axchg->ls_rsp,
2163                  axchg->payload, axchg->size);
2164
2165     lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
2166             "6037 NVMET Unsol rcv: sz %d rc %d: %08x %08x %08x "
2167             "%08x %08x %08x\n", axchg->size, rc,
2168             *payload, *(payload+1), *(payload+2),
2169             *(payload+3), *(payload+4), *(payload+5));
2170
2171     if (!rc) {
2172         atomic_inc(&tgtp->rcv_ls_req_out);
2173         return 0;
2174     }
2175
2176     atomic_inc(&tgtp->rcv_ls_req_drop);
2177 #endif
2178     return 1;
2179 }
2180
2181 static void
2182 lpfc_nvmet_process_rcv_fcp_req(struct lpfc_nvmet_ctxbuf *ctx_buf)
2183 {
2184 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2185     struct lpfc_async_xchg_ctx *ctxp = ctx_buf->context;
2186     struct lpfc_hba *phba = ctxp->phba;
2187     struct rqb_dmabuf *nvmebuf = ctxp->rqb_buffer;
2188     struct lpfc_nvmet_tgtport *tgtp;
2189     uint32_t *payload, qno;
2190     uint32_t rc;
2191     unsigned long iflags;
2192
2193     if (!nvmebuf) {
2194         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2195             "6159 process_rcv_fcp_req, nvmebuf is NULL, "
2196             "oxid: x%x flg: x%x state: x%x\n",
2197             ctxp->oxid, ctxp->flag, ctxp->state);
2198         spin_lock_irqsave(&ctxp->ctxlock, iflags);
2199         lpfc_nvmet_defer_release(phba, ctxp);
2200         spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2201         lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid,
2202                          ctxp->oxid);
2203         return;
2204     }
2205
2206     if (ctxp->flag & LPFC_NVME_ABTS_RCV) {
2207         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2208                 "6324 IO oxid x%x aborted\n",
2209                 ctxp->oxid);
2210         return;
2211     }
2212
2213     payload = (uint32_t *)(nvmebuf->dbuf.virt);
2214     tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2215     ctxp->flag |= LPFC_NVME_TNOTIFY;
2216 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2217     if (ctxp->ts_isr_cmd)
2218         ctxp->ts_cmd_nvme = ktime_get_ns();
2219 #endif
2220     /*
2221      * The calling sequence should be:
2222      * nvmet_fc_rcv_fcp_req->lpfc_nvmet_xmt_fcp_op/cmp- req->done
2223      * lpfc_nvmet_xmt_fcp_op_cmp should free the allocated ctxp.
2224      * When we return from nvmet_fc_rcv_fcp_req, all relevant info
2225      * the NVME command / FC header is stored.
2226      * A buffer has already been reposted for this IO, so just free
2227      * the nvmebuf.
2228      */
2229     rc = nvmet_fc_rcv_fcp_req(phba->targetport, &ctxp->hdlrctx.fcp_req,
2230                   payload, ctxp->size);
2231     /* Process FCP command */
2232     if (rc == 0) {
2233         atomic_inc(&tgtp->rcv_fcp_cmd_out);
2234         spin_lock_irqsave(&ctxp->ctxlock, iflags);
2235         if ((ctxp->flag & LPFC_NVME_CTX_REUSE_WQ) ||
2236             (nvmebuf != ctxp->rqb_buffer)) {
2237             spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2238             return;
2239         }
2240         ctxp->rqb_buffer = NULL;
2241         spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2242         lpfc_rq_buf_free(phba, &nvmebuf->hbuf); /* repost */
2243         return;
2244     }
2245
2246     /* Processing of FCP command is deferred */
2247     if (rc == -EOVERFLOW) {
2248         lpfc_nvmeio_data(phba, "NVMET RCV BUSY: xri x%x sz %d "
2249                  "from %06x\n",
2250                  ctxp->oxid, ctxp->size, ctxp->sid);
2251         atomic_inc(&tgtp->rcv_fcp_cmd_out);
2252         atomic_inc(&tgtp->defer_fod);
2253         spin_lock_irqsave(&ctxp->ctxlock, iflags);
2254         if (ctxp->flag & LPFC_NVME_CTX_REUSE_WQ) {
2255             spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2256             return;
2257         }
2258         spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2259         /*
2260          * Post a replacement DMA buffer to RQ and defer
2261          * freeing rcv buffer till .defer_rcv callback
2262          */
2263         qno = nvmebuf->idx;
2264         lpfc_post_rq_buffer(
2265             phba, phba->sli4_hba.nvmet_mrq_hdr[qno],
2266             phba->sli4_hba.nvmet_mrq_data[qno], 1, qno);
2267         return;
2268     }
2269     ctxp->flag &= ~LPFC_NVME_TNOTIFY;
2270     atomic_inc(&tgtp->rcv_fcp_cmd_drop);
2271     lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2272             "2582 FCP Drop IO x%x: err x%x: x%x x%x x%x\n",
2273             ctxp->oxid, rc,
2274             atomic_read(&tgtp->rcv_fcp_cmd_in),
2275             atomic_read(&tgtp->rcv_fcp_cmd_out),
2276             atomic_read(&tgtp->xmt_fcp_release));
2277     lpfc_nvmeio_data(phba, "NVMET FCP DROP: xri x%x sz %d from %06x\n",
2278              ctxp->oxid, ctxp->size, ctxp->sid);
2279     spin_lock_irqsave(&ctxp->ctxlock, iflags);
2280     lpfc_nvmet_defer_release(phba, ctxp);
2281     spin_unlock_irqrestore(&ctxp->ctxlock, iflags);
2282     lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid, ctxp->oxid);
2283 #endif
2284 }
2285
2286 static void
2287 lpfc_nvmet_fcp_rqst_defer_work(struct work_struct *work)
2288 {
2289 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2290     struct lpfc_nvmet_ctxbuf *ctx_buf =
2291         container_of(work, struct lpfc_nvmet_ctxbuf, defer_work);
2292
2293     lpfc_nvmet_process_rcv_fcp_req(ctx_buf);
2294 #endif
2295 }
2296
2297 static struct lpfc_nvmet_ctxbuf *
2298 lpfc_nvmet_replenish_context(struct lpfc_hba *phba,
2299                  struct lpfc_nvmet_ctx_info *current_infop)
2300 {
2301 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
2302     struct lpfc_nvmet_ctxbuf *ctx_buf = NULL;
2303     struct lpfc_nvmet_ctx_info *get_infop;
2304     int i;
2305
2306     /*
2307      * The current_infop for the MRQ a NVME command IU was received
2308      * on is empty. Our goal is to replenish this MRQs context
2309      * list from a another CPUs.
2310      *
2311      * First we need to pick a context list to start looking on.
2312      * nvmet_ctx_start_cpu has available context the last time
2313      * we needed to replenish this CPU where nvmet_ctx_next_cpu
2314      * is just the next sequential CPU for this MRQ.
2315      */
2316     if (current_infop->nvmet_ctx_start_cpu)
2317         get_infop = current_infop->nvmet_ctx_start_cpu;
2318     else
2319         get_infop = current_infop->nvmet_ctx_next_cpu;
2320
2321     for (i = 0; i < phba->sli4_hba.num_possible_cpu; i++) {
2322         if (get_infop == current_infop) {
2323             get_infop = get_infop->nvmet_ctx_next_cpu;
2324             continue;
2325         }
2326         spin_lock(&get_infop->nvmet_ctx_list_lock);
2327
2328         /* Just take the entire context list, if there are any */
2329         if (get_infop->nvmet_ctx_list_cnt) {
2330             list_splice_init(&get_infop->nvmet_ctx_list,
2331                     &current_infop->nvmet_ctx_list);
2332             current_infop->nvmet_ctx_list_cnt =
2333                 get_infop->nvmet_ctx_list_cnt - 1;
2334             get_infop->nvmet_ctx_list_cnt = 0;
2335             spin_unlock(&get_infop->nvmet_ctx_list_lock);
2336
2337             current_infop->nvmet_ctx_start_cpu = get_infop;
2338             list_remove_head(&current_infop->nvmet_ctx_list,
2339                      ctx_buf, struct lpfc_nvmet_ctxbuf,
2340                      list);
2341             return ctx_buf;
2342         }
2343
2344         /* Otherwise, move on to the next CPU for this MRQ */
2345         spin_unlock(&get_infop->nvmet_ctx_list_lock);
2346         get_infop = get_infop->nvmet_ctx_next_cpu;
2347     }
2348
2349 #endif
2350     /* Nothing found, all contexts for the MRQ are in-flight */
2351     return NULL;
2352 }
2353
2354 /**
2355  * lpfc_nvmet_unsol_fcp_buffer - Process an unsolicited event data buffer
2356  * @phba: pointer to lpfc hba data structure.
2357  * @idx: relative index of MRQ vector
2358  * @nvmebuf: pointer to lpfc nvme command HBQ data structure.
2359  * @isr_timestamp: in jiffies.
2360  * @cqflag: cq processing information regarding workload.
2361  *
2362  * This routine is used for processing the WQE associated with a unsolicited
2363  * event. It first determines whether there is an existing ndlp that matches
2364  * the DID from the unsolicited WQE. If not, it will create a new one with
2365  * the DID from the unsolicited WQE. The ELS command from the unsolicited
2366  * WQE is then used to invoke the proper routine and to set up proper state
2367  * of the discovery state machine.
2368  **/
2369 static void
2370 lpfc_nvmet_unsol_fcp_buffer(struct lpfc_hba *phba,
2371                 uint32_t idx,
2372                 struct rqb_dmabuf *nvmebuf,
2373                 uint64_t isr_timestamp,
2374                 uint8_t cqflag)
2375 {
2376     struct lpfc_async_xchg_ctx *ctxp;
2377     struct lpfc_nvmet_tgtport *tgtp;
2378     struct fc_frame_header *fc_hdr;
2379     struct lpfc_nvmet_ctxbuf *ctx_buf;
2380     struct lpfc_nvmet_ctx_info *current_infop;
2381     uint32_t size, oxid, sid, qno;
2382     unsigned long iflag;
2383     int current_cpu;
2384
2385     if (!IS_ENABLED(CONFIG_NVME_TARGET_FC))
2386         return;
2387
2388     ctx_buf = NULL;
2389     if (!nvmebuf || !phba->targetport) {
2390         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2391                 "6157 NVMET FCP Drop IO\n");
2392         if (nvmebuf)
2393             lpfc_rq_buf_free(phba, &nvmebuf->hbuf);
2394         return;
2395     }
2396
2397     /*
2398      * Get a pointer to the context list for this MRQ based on
2399      * the CPU this MRQ IRQ is associated with. If the CPU association
2400      * changes from our initial assumption, the context list could
2401      * be empty, thus it would need to be replenished with the
2402      * context list from another CPU for this MRQ.
2403      */
2404     current_cpu = raw_smp_processor_id();
2405     current_infop = lpfc_get_ctx_list(phba, current_cpu, idx);
2406     spin_lock_irqsave(&current_infop->nvmet_ctx_list_lock, iflag);
2407     if (current_infop->nvmet_ctx_list_cnt) {
2408         list_remove_head(&current_infop->nvmet_ctx_list,
2409                  ctx_buf, struct lpfc_nvmet_ctxbuf, list);
2410         current_infop->nvmet_ctx_list_cnt--;
2411     } else {
2412         ctx_buf = lpfc_nvmet_replenish_context(phba, current_infop);
2413     }
2414     spin_unlock_irqrestore(&current_infop->nvmet_ctx_list_lock, iflag);
2415
2416     fc_hdr = (struct fc_frame_header *)(nvmebuf->hbuf.virt);
2417     oxid = be16_to_cpu(fc_hdr->fh_ox_id);
2418     size = nvmebuf->bytes_recv;
2419
2420 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2421     if (phba->hdwqstat_on & LPFC_CHECK_NVMET_IO) {
2422         this_cpu_inc(phba->sli4_hba.c_stat->rcv_io);
2423         if (idx != current_cpu)
2424             lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
2425                     "6703 CPU Check rcv: "
2426                     "cpu %d expect %d\n",
2427                     current_cpu, idx);
2428     }
2429 #endif
2430
2431     lpfc_nvmeio_data(phba, "NVMET FCP  RCV: xri x%x sz %d CPU %02x\n",
2432              oxid, size, raw_smp_processor_id());
2433
2434     tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2435
2436     if (!ctx_buf) {
2437         /* Queue this NVME IO to process later */
2438         spin_lock_irqsave(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
2439         list_add_tail(&nvmebuf->hbuf.list,
2440                   &phba->sli4_hba.lpfc_nvmet_io_wait_list);
2441         phba->sli4_hba.nvmet_io_wait_cnt++;
2442         phba->sli4_hba.nvmet_io_wait_total++;
2443         spin_unlock_irqrestore(&phba->sli4_hba.nvmet_io_wait_lock,
2444                        iflag);
2445
2446         /* Post a brand new DMA buffer to RQ */
2447         qno = nvmebuf->idx;
2448         lpfc_post_rq_buffer(
2449             phba, phba->sli4_hba.nvmet_mrq_hdr[qno],
2450             phba->sli4_hba.nvmet_mrq_data[qno], 1, qno);
2451
2452         atomic_inc(&tgtp->defer_ctx);
2453         return;
2454     }
2455
2456     sid = sli4_sid_from_fc_hdr(fc_hdr);
2457
2458     ctxp = (struct lpfc_async_xchg_ctx *)ctx_buf->context;
2459     spin_lock_irqsave(&phba->sli4_hba.t_active_list_lock, iflag);
2460     list_add_tail(&ctxp->list, &phba->sli4_hba.t_active_ctx_list);
2461     spin_unlock_irqrestore(&phba->sli4_hba.t_active_list_lock, iflag);
2462     if (ctxp->state != LPFC_NVME_STE_FREE) {
2463         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2464                 "6414 NVMET Context corrupt %d %d oxid x%x\n",
2465                 ctxp->state, ctxp->entry_cnt, ctxp->oxid);
2466     }
2467     ctxp->wqeq = NULL;
2468     ctxp->offset = 0;
2469     ctxp->phba = phba;
2470     ctxp->size = size;
2471     ctxp->oxid = oxid;
2472     ctxp->sid = sid;
2473     ctxp->idx = idx;
2474     ctxp->state = LPFC_NVME_STE_RCV;
2475     ctxp->entry_cnt = 1;
2476     ctxp->flag = 0;
2477     ctxp->ctxbuf = ctx_buf;
2478     ctxp->rqb_buffer = (void *)nvmebuf;
2479     ctxp->hdwq = NULL;
2480     spin_lock_init(&ctxp->ctxlock);
2481
2482 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
2483     if (isr_timestamp)
2484         ctxp->ts_isr_cmd = isr_timestamp;
2485     ctxp->ts_cmd_nvme = 0;
2486     ctxp->ts_nvme_data = 0;
2487     ctxp->ts_data_wqput = 0;
2488     ctxp->ts_isr_data = 0;
2489     ctxp->ts_data_nvme = 0;
2490     ctxp->ts_nvme_status = 0;
2491     ctxp->ts_status_wqput = 0;
2492     ctxp->ts_isr_status = 0;
2493     ctxp->ts_status_nvme = 0;
2494 #endif
2495
2496     atomic_inc(&tgtp->rcv_fcp_cmd_in);
2497     /* check for cq processing load */
2498     if (!cqflag) {
2499         lpfc_nvmet_process_rcv_fcp_req(ctx_buf);
2500         return;
2501     }
2502
2503     if (!queue_work(phba->wq, &ctx_buf->defer_work)) {
2504         atomic_inc(&tgtp->rcv_fcp_cmd_drop);
2505         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2506                 "6325 Unable to queue work for oxid x%x. "
2507                 "FCP Drop IO [x%x x%x x%x]\n",
2508                 ctxp->oxid,
2509                 atomic_read(&tgtp->rcv_fcp_cmd_in),
2510                 atomic_read(&tgtp->rcv_fcp_cmd_out),
2511                 atomic_read(&tgtp->xmt_fcp_release));
2512
2513         spin_lock_irqsave(&ctxp->ctxlock, iflag);
2514         lpfc_nvmet_defer_release(phba, ctxp);
2515         spin_unlock_irqrestore(&ctxp->ctxlock, iflag);
2516         lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, sid, oxid);
2517     }
2518 }
2519
2520 /**
2521  * lpfc_nvmet_unsol_fcp_event - Process an unsolicited event from an nvme nport
2522  * @phba: pointer to lpfc hba data structure.
2523  * @idx: relative index of MRQ vector
2524  * @nvmebuf: pointer to received nvme data structure.
2525  * @isr_timestamp: in jiffies.
2526  * @cqflag: cq processing information regarding workload.
2527  *
2528  * This routine is used to process an unsolicited event received from a SLI
2529  * (Service Level Interface) ring. The actual processing of the data buffer
2530  * associated with the unsolicited event is done by invoking the routine
2531  * lpfc_nvmet_unsol_fcp_buffer() after properly set up the buffer from the
2532  * SLI RQ on which the unsolicited event was received.
2533  **/
2534 void
2535 lpfc_nvmet_unsol_fcp_event(struct lpfc_hba *phba,
2536                uint32_t idx,
2537                struct rqb_dmabuf *nvmebuf,
2538                uint64_t isr_timestamp,
2539                uint8_t cqflag)
2540 {
2541     if (!nvmebuf) {
2542         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2543                 "3167 NVMET FCP Drop IO\n");
2544         return;
2545     }
2546     if (phba->nvmet_support == 0) {
2547         lpfc_rq_buf_free(phba, &nvmebuf->hbuf);
2548         return;
2549     }
2550     lpfc_nvmet_unsol_fcp_buffer(phba, idx, nvmebuf, isr_timestamp, cqflag);
2551 }
2552
2553 /**
2554  * lpfc_nvmet_prep_ls_wqe - Allocate and prepare a lpfc wqe data structure
2555  * @phba: pointer to a host N_Port data structure.
2556  * @ctxp: Context info for NVME LS Request
2557  * @rspbuf: DMA buffer of NVME command.
2558  * @rspsize: size of the NVME command.
2559  *
2560  * This routine is used for allocating a lpfc-WQE data structure from
2561  * the driver lpfc-WQE free-list and prepare the WQE with the parameters
2562  * passed into the routine for discovery state machine to issue an Extended
2563  * Link Service (NVME) commands. It is a generic lpfc-WQE allocation
2564  * and preparation routine that is used by all the discovery state machine
2565  * routines and the NVME command-specific fields will be later set up by
2566  * the individual discovery machine routines after calling this routine
2567  * allocating and preparing a generic WQE data structure. It fills in the
2568  * Buffer Descriptor Entries (BDEs), allocates buffers for both command
2569  * payload and response payload (if expected). The reference count on the
2570  * ndlp is incremented by 1 and the reference to the ndlp is put into
2571  * context1 of the WQE data structure for this WQE to hold the ndlp
2572  * reference for the command's callback function to access later.
2573  *
2574  * Return code
2575  *   Pointer to the newly allocated/prepared nvme wqe data structure
2576  *   NULL - when nvme wqe data structure allocation/preparation failed
2577  **/
2578 static struct lpfc_iocbq *
2579 lpfc_nvmet_prep_ls_wqe(struct lpfc_hba *phba,
2580                struct lpfc_async_xchg_ctx *ctxp,
2581                dma_addr_t rspbuf, uint16_t rspsize)
2582 {
2583     struct lpfc_nodelist *ndlp;
2584     struct lpfc_iocbq *nvmewqe;
2585     union lpfc_wqe128 *wqe;
2586
2587     if (!lpfc_is_link_up(phba)) {
2588         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2589                 "6104 NVMET prep LS wqe: link err: "
2590                 "NPORT x%x oxid:x%x ste %d\n",
2591                 ctxp->sid, ctxp->oxid, ctxp->state);
2592         return NULL;
2593     }
2594
2595     /* Allocate buffer for  command wqe */
2596     nvmewqe = lpfc_sli_get_iocbq(phba);
2597     if (nvmewqe == NULL) {
2598         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2599                 "6105 NVMET prep LS wqe: No WQE: "
2600                 "NPORT x%x oxid x%x ste %d\n",
2601                 ctxp->sid, ctxp->oxid, ctxp->state);
2602         return NULL;
2603     }
2604
2605     ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
2606     if (!ndlp ||
2607         ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
2608         (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
2609         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2610                 "6106 NVMET prep LS wqe: No ndlp: "
2611                 "NPORT x%x oxid x%x ste %d\n",
2612                 ctxp->sid, ctxp->oxid, ctxp->state);
2613         goto nvme_wqe_free_wqeq_exit;
2614     }
2615     ctxp->wqeq = nvmewqe;
2616
2617     /* prevent preparing wqe with NULL ndlp reference */
2618     nvmewqe->ndlp = lpfc_nlp_get(ndlp);
2619     if (!nvmewqe->ndlp)
2620         goto nvme_wqe_free_wqeq_exit;
2621     nvmewqe->context_un.axchg = ctxp;
2622
2623     wqe = &nvmewqe->wqe;
2624     memset(wqe, 0, sizeof(union lpfc_wqe));
2625
2626     /* Words 0 - 2 */
2627     wqe->xmit_sequence.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2628     wqe->xmit_sequence.bde.tus.f.bdeSize = rspsize;
2629     wqe->xmit_sequence.bde.addrLow = le32_to_cpu(putPaddrLow(rspbuf));
2630     wqe->xmit_sequence.bde.addrHigh = le32_to_cpu(putPaddrHigh(rspbuf));
2631
2632     /* Word 3 */
2633
2634     /* Word 4 */
2635
2636     /* Word 5 */
2637     bf_set(wqe_dfctl, &wqe->xmit_sequence.wge_ctl, 0);
2638     bf_set(wqe_ls, &wqe->xmit_sequence.wge_ctl, 1);
2639     bf_set(wqe_la, &wqe->xmit_sequence.wge_ctl, 0);
2640     bf_set(wqe_rctl, &wqe->xmit_sequence.wge_ctl, FC_RCTL_ELS4_REP);
2641     bf_set(wqe_type, &wqe->xmit_sequence.wge_ctl, FC_TYPE_NVME);
2642
2643     /* Word 6 */
2644     bf_set(wqe_ctxt_tag, &wqe->xmit_sequence.wqe_com,
2645            phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2646     bf_set(wqe_xri_tag, &wqe->xmit_sequence.wqe_com, nvmewqe->sli4_xritag);
2647
2648     /* Word 7 */
2649     bf_set(wqe_cmnd, &wqe->xmit_sequence.wqe_com,
2650            CMD_XMIT_SEQUENCE64_WQE);
2651     bf_set(wqe_ct, &wqe->xmit_sequence.wqe_com, SLI4_CT_RPI);
2652     bf_set(wqe_class, &wqe->xmit_sequence.wqe_com, CLASS3);
2653     bf_set(wqe_pu, &wqe->xmit_sequence.wqe_com, 0);
2654
2655     /* Word 8 */
2656     wqe->xmit_sequence.wqe_com.abort_tag = nvmewqe->iotag;
2657
2658     /* Word 9 */
2659     bf_set(wqe_reqtag, &wqe->xmit_sequence.wqe_com, nvmewqe->iotag);
2660     /* Needs to be set by caller */
2661     bf_set(wqe_rcvoxid, &wqe->xmit_sequence.wqe_com, ctxp->oxid);
2662
2663     /* Word 10 */
2664     bf_set(wqe_dbde, &wqe->xmit_sequence.wqe_com, 1);
2665     bf_set(wqe_iod, &wqe->xmit_sequence.wqe_com, LPFC_WQE_IOD_WRITE);
2666     bf_set(wqe_lenloc, &wqe->xmit_sequence.wqe_com,
2667            LPFC_WQE_LENLOC_WORD12);
2668     bf_set(wqe_ebde_cnt, &wqe->xmit_sequence.wqe_com, 0);
2669
2670     /* Word 11 */
2671     bf_set(wqe_cqid, &wqe->xmit_sequence.wqe_com,
2672            LPFC_WQE_CQ_ID_DEFAULT);
2673     bf_set(wqe_cmd_type, &wqe->xmit_sequence.wqe_com,
2674            OTHER_COMMAND);
2675
2676     /* Word 12 */
2677     wqe->xmit_sequence.xmit_len = rspsize;
2678
2679     nvmewqe->retry = 1;
2680     nvmewqe->vport = phba->pport;
2681     nvmewqe->drvrTimeout = (phba->fc_ratov * 3) + LPFC_DRVR_TIMEOUT;
2682     nvmewqe->cmd_flag |= LPFC_IO_NVME_LS;
2683
2684     /* Xmit NVMET response to remote NPORT <did> */
2685     lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
2686             "6039 Xmit NVMET LS response to remote "
2687             "NPORT x%x iotag:x%x oxid:x%x size:x%x\n",
2688             ndlp->nlp_DID, nvmewqe->iotag, ctxp->oxid,
2689             rspsize);
2690     return nvmewqe;
2691
2692 nvme_wqe_free_wqeq_exit:
2693     nvmewqe->context_un.axchg = NULL;
2694     nvmewqe->ndlp = NULL;
2695     nvmewqe->bpl_dmabuf = NULL;
2696     lpfc_sli_release_iocbq(phba, nvmewqe);
2697     return NULL;
2698 }
2699
2700
2701 static struct lpfc_iocbq *
2702 lpfc_nvmet_prep_fcp_wqe(struct lpfc_hba *phba,
2703             struct lpfc_async_xchg_ctx *ctxp)
2704 {
2705     struct nvmefc_tgt_fcp_req *rsp = &ctxp->hdlrctx.fcp_req;
2706     struct lpfc_nvmet_tgtport *tgtp;
2707     struct sli4_sge *sgl;
2708     struct lpfc_nodelist *ndlp;
2709     struct lpfc_iocbq *nvmewqe;
2710     struct scatterlist *sgel;
2711     union lpfc_wqe128 *wqe;
2712     struct ulp_bde64 *bde;
2713     dma_addr_t physaddr;
2714     int i, cnt, nsegs;
2715     bool use_pbde = false;
2716     int xc = 1;
2717
2718     if (!lpfc_is_link_up(phba)) {
2719         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2720                 "6107 NVMET prep FCP wqe: link err:"
2721                 "NPORT x%x oxid x%x ste %d\n",
2722                 ctxp->sid, ctxp->oxid, ctxp->state);
2723         return NULL;
2724     }
2725
2726     ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
2727     if (!ndlp ||
2728         ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
2729          (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
2730         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2731                 "6108 NVMET prep FCP wqe: no ndlp: "
2732                 "NPORT x%x oxid x%x ste %d\n",
2733                 ctxp->sid, ctxp->oxid, ctxp->state);
2734         return NULL;
2735     }
2736
2737     if (rsp->sg_cnt > lpfc_tgttemplate.max_sgl_segments) {
2738         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2739                 "6109 NVMET prep FCP wqe: seg cnt err: "
2740                 "NPORT x%x oxid x%x ste %d cnt %d\n",
2741                 ctxp->sid, ctxp->oxid, ctxp->state,
2742                 phba->cfg_nvme_seg_cnt);
2743         return NULL;
2744     }
2745     nsegs = rsp->sg_cnt;
2746
2747     tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
2748     nvmewqe = ctxp->wqeq;
2749     if (nvmewqe == NULL) {
2750         /* Allocate buffer for  command wqe */
2751         nvmewqe = ctxp->ctxbuf->iocbq;
2752         if (nvmewqe == NULL) {
2753             lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2754                     "6110 NVMET prep FCP wqe: No "
2755                     "WQE: NPORT x%x oxid x%x ste %d\n",
2756                     ctxp->sid, ctxp->oxid, ctxp->state);
2757             return NULL;
2758         }
2759         ctxp->wqeq = nvmewqe;
2760         xc = 0; /* create new XRI */
2761         nvmewqe->sli4_lxritag = NO_XRI;
2762         nvmewqe->sli4_xritag = NO_XRI;
2763     }
2764
2765     /* Sanity check */
2766     if (((ctxp->state == LPFC_NVME_STE_RCV) &&
2767         (ctxp->entry_cnt == 1)) ||
2768         (ctxp->state == LPFC_NVME_STE_DATA)) {
2769         wqe = &nvmewqe->wqe;
2770     } else {
2771         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
2772                 "6111 Wrong state NVMET FCP: %d  cnt %d\n",
2773                 ctxp->state, ctxp->entry_cnt);
2774         return NULL;
2775     }
2776
2777     sgl  = (struct sli4_sge *)ctxp->ctxbuf->sglq->sgl;
2778     switch (rsp->op) {
2779     case NVMET_FCOP_READDATA:
2780     case NVMET_FCOP_READDATA_RSP:
2781         /* From the tsend template, initialize words 7 - 11 */
2782         memcpy(&wqe->words[7],
2783                &lpfc_tsend_cmd_template.words[7],
2784                sizeof(uint32_t) * 5);
2785
2786         /* Words 0 - 2 : The first sg segment */
2787         sgel = &rsp->sg[0];
2788         physaddr = sg_dma_address(sgel);
2789         wqe->fcp_tsend.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2790         wqe->fcp_tsend.bde.tus.f.bdeSize = sg_dma_len(sgel);
2791         wqe->fcp_tsend.bde.addrLow = cpu_to_le32(putPaddrLow(physaddr));
2792         wqe->fcp_tsend.bde.addrHigh =
2793             cpu_to_le32(putPaddrHigh(physaddr));
2794
2795         /* Word 3 */
2796         wqe->fcp_tsend.payload_offset_len = 0;
2797
2798         /* Word 4 */
2799         wqe->fcp_tsend.relative_offset = ctxp->offset;
2800
2801         /* Word 5 */
2802         wqe->fcp_tsend.reserved = 0;
2803
2804         /* Word 6 */
2805         bf_set(wqe_ctxt_tag, &wqe->fcp_tsend.wqe_com,
2806                phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2807         bf_set(wqe_xri_tag, &wqe->fcp_tsend.wqe_com,
2808                nvmewqe->sli4_xritag);
2809
2810         /* Word 7 - set ar later */
2811
2812         /* Word 8 */
2813         wqe->fcp_tsend.wqe_com.abort_tag = nvmewqe->iotag;
2814
2815         /* Word 9 */
2816         bf_set(wqe_reqtag, &wqe->fcp_tsend.wqe_com, nvmewqe->iotag);
2817         bf_set(wqe_rcvoxid, &wqe->fcp_tsend.wqe_com, ctxp->oxid);
2818
2819         /* Word 10 - set wqes later, in template xc=1 */
2820         if (!xc)
2821             bf_set(wqe_xc, &wqe->fcp_tsend.wqe_com, 0);
2822
2823         /* Word 12 */
2824         wqe->fcp_tsend.fcp_data_len = rsp->transfer_length;
2825
2826         /* Setup 2 SKIP SGEs */
2827         sgl->addr_hi = 0;
2828         sgl->addr_lo = 0;
2829         sgl->word2 = 0;
2830         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2831         sgl->word2 = cpu_to_le32(sgl->word2);
2832         sgl->sge_len = 0;
2833         sgl++;
2834         sgl->addr_hi = 0;
2835         sgl->addr_lo = 0;
2836         sgl->word2 = 0;
2837         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2838         sgl->word2 = cpu_to_le32(sgl->word2);
2839         sgl->sge_len = 0;
2840         sgl++;
2841         if (rsp->op == NVMET_FCOP_READDATA_RSP) {
2842             atomic_inc(&tgtp->xmt_fcp_read_rsp);
2843
2844             /* In template ar=1 wqes=0 sup=0 irsp=0 irsplen=0 */
2845
2846             if (rsp->rsplen == LPFC_NVMET_SUCCESS_LEN) {
2847                 if (ndlp->nlp_flag & NLP_SUPPRESS_RSP)
2848                     bf_set(wqe_sup,
2849                            &wqe->fcp_tsend.wqe_com, 1);
2850             } else {
2851                 bf_set(wqe_wqes, &wqe->fcp_tsend.wqe_com, 1);
2852                 bf_set(wqe_irsp, &wqe->fcp_tsend.wqe_com, 1);
2853                 bf_set(wqe_irsplen, &wqe->fcp_tsend.wqe_com,
2854                        ((rsp->rsplen >> 2) - 1));
2855                 memcpy(&wqe->words[16], rsp->rspaddr,
2856                        rsp->rsplen);
2857             }
2858         } else {
2859             atomic_inc(&tgtp->xmt_fcp_read);
2860
2861             /* In template ar=1 wqes=0 sup=0 irsp=0 irsplen=0 */
2862             bf_set(wqe_ar, &wqe->fcp_tsend.wqe_com, 0);
2863         }
2864         break;
2865
2866     case NVMET_FCOP_WRITEDATA:
2867         /* From the treceive template, initialize words 3 - 11 */
2868         memcpy(&wqe->words[3],
2869                &lpfc_treceive_cmd_template.words[3],
2870                sizeof(uint32_t) * 9);
2871
2872         /* Words 0 - 2 : First SGE is skipped, set invalid BDE type */
2873         wqe->fcp_treceive.bde.tus.f.bdeFlags = LPFC_SGE_TYPE_SKIP;
2874         wqe->fcp_treceive.bde.tus.f.bdeSize = 0;
2875         wqe->fcp_treceive.bde.addrLow = 0;
2876         wqe->fcp_treceive.bde.addrHigh = 0;
2877
2878         /* Word 4 */
2879         wqe->fcp_treceive.relative_offset = ctxp->offset;
2880
2881         /* Word 6 */
2882         bf_set(wqe_ctxt_tag, &wqe->fcp_treceive.wqe_com,
2883                phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2884         bf_set(wqe_xri_tag, &wqe->fcp_treceive.wqe_com,
2885                nvmewqe->sli4_xritag);
2886
2887         /* Word 7 */
2888
2889         /* Word 8 */
2890         wqe->fcp_treceive.wqe_com.abort_tag = nvmewqe->iotag;
2891
2892         /* Word 9 */
2893         bf_set(wqe_reqtag, &wqe->fcp_treceive.wqe_com, nvmewqe->iotag);
2894         bf_set(wqe_rcvoxid, &wqe->fcp_treceive.wqe_com, ctxp->oxid);
2895
2896         /* Word 10 - in template xc=1 */
2897         if (!xc)
2898             bf_set(wqe_xc, &wqe->fcp_treceive.wqe_com, 0);
2899
2900         /* Word 11 - check for pbde */
2901         if (nsegs == 1 && phba->cfg_enable_pbde) {
2902             use_pbde = true;
2903             /* Word 11 - PBDE bit already preset by template */
2904         } else {
2905             /* Overwrite default template setting */
2906             bf_set(wqe_pbde, &wqe->fcp_treceive.wqe_com, 0);
2907         }
2908
2909         /* Word 12 */
2910         wqe->fcp_tsend.fcp_data_len = rsp->transfer_length;
2911
2912         /* Setup 2 SKIP SGEs */
2913         sgl->addr_hi = 0;
2914         sgl->addr_lo = 0;
2915         sgl->word2 = 0;
2916         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2917         sgl->word2 = cpu_to_le32(sgl->word2);
2918         sgl->sge_len = 0;
2919         sgl++;
2920         sgl->addr_hi = 0;
2921         sgl->addr_lo = 0;
2922         sgl->word2 = 0;
2923         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
2924         sgl->word2 = cpu_to_le32(sgl->word2);
2925         sgl->sge_len = 0;
2926         sgl++;
2927         atomic_inc(&tgtp->xmt_fcp_write);
2928         break;
2929
2930     case NVMET_FCOP_RSP:
2931         /* From the treceive template, initialize words 4 - 11 */
2932         memcpy(&wqe->words[4],
2933                &lpfc_trsp_cmd_template.words[4],
2934                sizeof(uint32_t) * 8);
2935
2936         /* Words 0 - 2 */
2937         physaddr = rsp->rspdma;
2938         wqe->fcp_trsp.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
2939         wqe->fcp_trsp.bde.tus.f.bdeSize = rsp->rsplen;
2940         wqe->fcp_trsp.bde.addrLow =
2941             cpu_to_le32(putPaddrLow(physaddr));
2942         wqe->fcp_trsp.bde.addrHigh =
2943             cpu_to_le32(putPaddrHigh(physaddr));
2944
2945         /* Word 3 */
2946         wqe->fcp_trsp.response_len = rsp->rsplen;
2947
2948         /* Word 6 */
2949         bf_set(wqe_ctxt_tag, &wqe->fcp_trsp.wqe_com,
2950                phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
2951         bf_set(wqe_xri_tag, &wqe->fcp_trsp.wqe_com,
2952                nvmewqe->sli4_xritag);
2953
2954         /* Word 7 */
2955
2956         /* Word 8 */
2957         wqe->fcp_trsp.wqe_com.abort_tag = nvmewqe->iotag;
2958
2959         /* Word 9 */
2960         bf_set(wqe_reqtag, &wqe->fcp_trsp.wqe_com, nvmewqe->iotag);
2961         bf_set(wqe_rcvoxid, &wqe->fcp_trsp.wqe_com, ctxp->oxid);
2962
2963         /* Word 10 */
2964         if (xc)
2965             bf_set(wqe_xc, &wqe->fcp_trsp.wqe_com, 1);
2966
2967         /* Word 11 */
2968         /* In template wqes=0 irsp=0 irsplen=0 - good response */
2969         if (rsp->rsplen != LPFC_NVMET_SUCCESS_LEN) {
2970             /* Bad response - embed it */
2971             bf_set(wqe_wqes, &wqe->fcp_trsp.wqe_com, 1);
2972             bf_set(wqe_irsp, &wqe->fcp_trsp.wqe_com, 1);
2973             bf_set(wqe_irsplen, &wqe->fcp_trsp.wqe_com,
2974                    ((rsp->rsplen >> 2) - 1));
2975             memcpy(&wqe->words[16], rsp->rspaddr, rsp->rsplen);
2976         }
2977
2978         /* Word 12 */
2979         wqe->fcp_trsp.rsvd_12_15[0] = 0;
2980
2981         /* Use rspbuf, NOT sg list */
2982         nsegs = 0;
2983         sgl->word2 = 0;
2984         atomic_inc(&tgtp->xmt_fcp_rsp);
2985         break;
2986
2987     default:
2988         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
2989                 "6064 Unknown Rsp Op %d\n",
2990                 rsp->op);
2991         return NULL;
2992     }
2993
2994     nvmewqe->retry = 1;
2995     nvmewqe->vport = phba->pport;
2996     nvmewqe->drvrTimeout = (phba->fc_ratov * 3) + LPFC_DRVR_TIMEOUT;
2997     nvmewqe->ndlp = ndlp;
2998
2999     for_each_sg(rsp->sg, sgel, nsegs, i) {
3000         physaddr = sg_dma_address(sgel);
3001         cnt = sg_dma_len(sgel);
3002         sgl->addr_hi = putPaddrHigh(physaddr);
3003         sgl->addr_lo = putPaddrLow(physaddr);
3004         sgl->word2 = 0;
3005         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
3006         bf_set(lpfc_sli4_sge_offset, sgl, ctxp->offset);
3007         if ((i+1) == rsp->sg_cnt)
3008             bf_set(lpfc_sli4_sge_last, sgl, 1);
3009         sgl->word2 = cpu_to_le32(sgl->word2);
3010         sgl->sge_len = cpu_to_le32(cnt);
3011         sgl++;
3012         ctxp->offset += cnt;
3013     }
3014
3015     bde = (struct ulp_bde64 *)&wqe->words[13];
3016     if (use_pbde) {
3017         /* decrement sgl ptr backwards once to first data sge */
3018         sgl--;
3019
3020         /* Words 13-15 (PBDE) */
3021         bde->addrLow = sgl->addr_lo;
3022         bde->addrHigh = sgl->addr_hi;
3023         bde->tus.f.bdeSize = le32_to_cpu(sgl->sge_len);
3024         bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
3025         bde->tus.w = cpu_to_le32(bde->tus.w);
3026     } else {
3027         memset(bde, 0, sizeof(struct ulp_bde64));
3028     }
3029     ctxp->state = LPFC_NVME_STE_DATA;
3030     ctxp->entry_cnt++;
3031     return nvmewqe;
3032 }
3033
3034 /**
3035  * lpfc_nvmet_sol_fcp_abort_cmp - Completion handler for ABTS
3036  * @phba: Pointer to HBA context object.
3037  * @cmdwqe: Pointer to driver command WQE object.
3038  * @rspwqe: Pointer to driver response WQE object.
3039  *
3040  * The function is called from SLI ring event handler with no
3041  * lock held. This function is the completion handler for NVME ABTS for FCP cmds
3042  * The function frees memory resources used for the NVME commands.
3043  **/
3044 static void
3045 lpfc_nvmet_sol_fcp_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3046                  struct lpfc_iocbq *rspwqe)
3047 {
3048     struct lpfc_async_xchg_ctx *ctxp;
3049     struct lpfc_nvmet_tgtport *tgtp;
3050     uint32_t result;
3051     unsigned long flags;
3052     bool released = false;
3053     struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
3054
3055     ctxp = cmdwqe->context_un.axchg;
3056     result = wcqe->parameter;
3057
3058     tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3059     if (ctxp->flag & LPFC_NVME_ABORT_OP)
3060         atomic_inc(&tgtp->xmt_fcp_abort_cmpl);
3061
3062     spin_lock_irqsave(&ctxp->ctxlock, flags);
3063     ctxp->state = LPFC_NVME_STE_DONE;
3064
3065     /* Check if we already received a free context call
3066      * and we have completed processing an abort situation.
3067      */
3068     if ((ctxp->flag & LPFC_NVME_CTX_RLS) &&
3069         !(ctxp->flag & LPFC_NVME_XBUSY)) {
3070         spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3071         list_del_init(&ctxp->list);
3072         spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3073         released = true;
3074     }
3075     ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3076     spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3077     atomic_inc(&tgtp->xmt_abort_rsp);
3078
3079     lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3080             "6165 ABORT cmpl: oxid x%x flg x%x (%d) "
3081             "WCQE: %08x %08x %08x %08x\n",
3082             ctxp->oxid, ctxp->flag, released,
3083             wcqe->word0, wcqe->total_data_placed,
3084             result, wcqe->word3);
3085
3086     cmdwqe->rsp_dmabuf = NULL;
3087     cmdwqe->bpl_dmabuf = NULL;
3088     /*
3089      * if transport has released ctx, then can reuse it. Otherwise,
3090      * will be recycled by transport release call.
3091      */
3092     if (released)
3093         lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
3094
3095     /* This is the iocbq for the abort, not the command */
3096     lpfc_sli_release_iocbq(phba, cmdwqe);
3097
3098     /* Since iaab/iaar are NOT set, there is no work left.
3099      * For LPFC_NVME_XBUSY, lpfc_sli4_nvmet_xri_aborted
3100      * should have been called already.
3101      */
3102 }
3103
3104 /**
3105  * lpfc_nvmet_unsol_fcp_abort_cmp - Completion handler for ABTS
3106  * @phba: Pointer to HBA context object.
3107  * @cmdwqe: Pointer to driver command WQE object.
3108  * @rspwqe: Pointer to driver response WQE object.
3109  *
3110  * The function is called from SLI ring event handler with no
3111  * lock held. This function is the completion handler for NVME ABTS for FCP cmds
3112  * The function frees memory resources used for the NVME commands.
3113  **/
3114 static void
3115 lpfc_nvmet_unsol_fcp_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3116                    struct lpfc_iocbq *rspwqe)
3117 {
3118     struct lpfc_async_xchg_ctx *ctxp;
3119     struct lpfc_nvmet_tgtport *tgtp;
3120     unsigned long flags;
3121     uint32_t result;
3122     bool released = false;
3123     struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
3124
3125     ctxp = cmdwqe->context_un.axchg;
3126     result = wcqe->parameter;
3127
3128     if (!ctxp) {
3129         /* if context is clear, related io alrady complete */
3130         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3131                 "6070 ABTS cmpl: WCQE: %08x %08x %08x %08x\n",
3132                 wcqe->word0, wcqe->total_data_placed,
3133                 result, wcqe->word3);
3134         return;
3135     }
3136
3137     tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3138     spin_lock_irqsave(&ctxp->ctxlock, flags);
3139     if (ctxp->flag & LPFC_NVME_ABORT_OP)
3140         atomic_inc(&tgtp->xmt_fcp_abort_cmpl);
3141
3142     /* Sanity check */
3143     if (ctxp->state != LPFC_NVME_STE_ABORT) {
3144         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3145                 "6112 ABTS Wrong state:%d oxid x%x\n",
3146                 ctxp->state, ctxp->oxid);
3147     }
3148
3149     /* Check if we already received a free context call
3150      * and we have completed processing an abort situation.
3151      */
3152     ctxp->state = LPFC_NVME_STE_DONE;
3153     if ((ctxp->flag & LPFC_NVME_CTX_RLS) &&
3154         !(ctxp->flag & LPFC_NVME_XBUSY)) {
3155         spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3156         list_del_init(&ctxp->list);
3157         spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3158         released = true;
3159     }
3160     ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3161     spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3162     atomic_inc(&tgtp->xmt_abort_rsp);
3163
3164     lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3165             "6316 ABTS cmpl oxid x%x flg x%x (%x) "
3166             "WCQE: %08x %08x %08x %08x\n",
3167             ctxp->oxid, ctxp->flag, released,
3168             wcqe->word0, wcqe->total_data_placed,
3169             result, wcqe->word3);
3170
3171     cmdwqe->rsp_dmabuf = NULL;
3172     cmdwqe->bpl_dmabuf = NULL;
3173     /*
3174      * if transport has released ctx, then can reuse it. Otherwise,
3175      * will be recycled by transport release call.
3176      */
3177     if (released)
3178         lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
3179
3180     /* Since iaab/iaar are NOT set, there is no work left.
3181      * For LPFC_NVME_XBUSY, lpfc_sli4_nvmet_xri_aborted
3182      * should have been called already.
3183      */
3184 }
3185
3186 /**
3187  * lpfc_nvmet_xmt_ls_abort_cmp - Completion handler for ABTS
3188  * @phba: Pointer to HBA context object.
3189  * @cmdwqe: Pointer to driver command WQE object.
3190  * @rspwqe: Pointer to driver response WQE object.
3191  *
3192  * The function is called from SLI ring event handler with no
3193  * lock held. This function is the completion handler for NVME ABTS for LS cmds
3194  * The function frees memory resources used for the NVME commands.
3195  **/
3196 static void
3197 lpfc_nvmet_xmt_ls_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
3198                 struct lpfc_iocbq *rspwqe)
3199 {
3200     struct lpfc_async_xchg_ctx *ctxp;
3201     struct lpfc_nvmet_tgtport *tgtp;
3202     uint32_t result;
3203     struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
3204
3205     ctxp = cmdwqe->context_un.axchg;
3206     result = wcqe->parameter;
3207
3208     if (phba->nvmet_support) {
3209         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3210         atomic_inc(&tgtp->xmt_ls_abort_cmpl);
3211     }
3212
3213     lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3214             "6083 Abort cmpl: ctx x%px WCQE:%08x %08x %08x %08x\n",
3215             ctxp, wcqe->word0, wcqe->total_data_placed,
3216             result, wcqe->word3);
3217
3218     if (!ctxp) {
3219         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3220                 "6415 NVMET LS Abort No ctx: WCQE: "
3221                  "%08x %08x %08x %08x\n",
3222                 wcqe->word0, wcqe->total_data_placed,
3223                 result, wcqe->word3);
3224
3225         lpfc_sli_release_iocbq(phba, cmdwqe);
3226         return;
3227     }
3228
3229     if (ctxp->state != LPFC_NVME_STE_LS_ABORT) {
3230         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3231                 "6416 NVMET LS abort cmpl state mismatch: "
3232                 "oxid x%x: %d %d\n",
3233                 ctxp->oxid, ctxp->state, ctxp->entry_cnt);
3234     }
3235
3236     cmdwqe->rsp_dmabuf = NULL;
3237     cmdwqe->bpl_dmabuf = NULL;
3238     lpfc_sli_release_iocbq(phba, cmdwqe);
3239     kfree(ctxp);
3240 }
3241
3242 static int
3243 lpfc_nvmet_unsol_issue_abort(struct lpfc_hba *phba,
3244                  struct lpfc_async_xchg_ctx *ctxp,
3245                  uint32_t sid, uint16_t xri)
3246 {
3247     struct lpfc_nvmet_tgtport *tgtp = NULL;
3248     struct lpfc_iocbq *abts_wqeq;
3249     union lpfc_wqe128 *wqe_abts;
3250     struct lpfc_nodelist *ndlp;
3251
3252     lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3253             "6067 ABTS: sid %x xri x%x/x%x\n",
3254             sid, xri, ctxp->wqeq->sli4_xritag);
3255
3256     if (phba->nvmet_support && phba->targetport)
3257         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3258
3259     ndlp = lpfc_findnode_did(phba->pport, sid);
3260     if (!ndlp ||
3261         ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
3262         (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
3263         if (tgtp)
3264             atomic_inc(&tgtp->xmt_abort_rsp_error);
3265         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3266                 "6134 Drop ABTS - wrong NDLP state x%x.\n",
3267                 (ndlp) ? ndlp->nlp_state : NLP_STE_MAX_STATE);
3268
3269         /* No failure to an ABTS request. */
3270         return 0;
3271     }
3272
3273     abts_wqeq = ctxp->wqeq;
3274     wqe_abts = &abts_wqeq->wqe;
3275
3276     /*
3277      * Since we zero the whole WQE, we need to ensure we set the WQE fields
3278      * that were initialized in lpfc_sli4_nvmet_alloc.
3279      */
3280     memset(wqe_abts, 0, sizeof(union lpfc_wqe));
3281
3282     /* Word 5 */
3283     bf_set(wqe_dfctl, &wqe_abts->xmit_sequence.wge_ctl, 0);
3284     bf_set(wqe_ls, &wqe_abts->xmit_sequence.wge_ctl, 1);
3285     bf_set(wqe_la, &wqe_abts->xmit_sequence.wge_ctl, 0);
3286     bf_set(wqe_rctl, &wqe_abts->xmit_sequence.wge_ctl, FC_RCTL_BA_ABTS);
3287     bf_set(wqe_type, &wqe_abts->xmit_sequence.wge_ctl, FC_TYPE_BLS);
3288
3289     /* Word 6 */
3290     bf_set(wqe_ctxt_tag, &wqe_abts->xmit_sequence.wqe_com,
3291            phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
3292     bf_set(wqe_xri_tag, &wqe_abts->xmit_sequence.wqe_com,
3293            abts_wqeq->sli4_xritag);
3294
3295     /* Word 7 */
3296     bf_set(wqe_cmnd, &wqe_abts->xmit_sequence.wqe_com,
3297            CMD_XMIT_SEQUENCE64_WQE);
3298     bf_set(wqe_ct, &wqe_abts->xmit_sequence.wqe_com, SLI4_CT_RPI);
3299     bf_set(wqe_class, &wqe_abts->xmit_sequence.wqe_com, CLASS3);
3300     bf_set(wqe_pu, &wqe_abts->xmit_sequence.wqe_com, 0);
3301
3302     /* Word 8 */
3303     wqe_abts->xmit_sequence.wqe_com.abort_tag = abts_wqeq->iotag;
3304
3305     /* Word 9 */
3306     bf_set(wqe_reqtag, &wqe_abts->xmit_sequence.wqe_com, abts_wqeq->iotag);
3307     /* Needs to be set by caller */
3308     bf_set(wqe_rcvoxid, &wqe_abts->xmit_sequence.wqe_com, xri);
3309
3310     /* Word 10 */
3311     bf_set(wqe_iod, &wqe_abts->xmit_sequence.wqe_com, LPFC_WQE_IOD_WRITE);
3312     bf_set(wqe_lenloc, &wqe_abts->xmit_sequence.wqe_com,
3313            LPFC_WQE_LENLOC_WORD12);
3314     bf_set(wqe_ebde_cnt, &wqe_abts->xmit_sequence.wqe_com, 0);
3315     bf_set(wqe_qosd, &wqe_abts->xmit_sequence.wqe_com, 0);
3316
3317     /* Word 11 */
3318     bf_set(wqe_cqid, &wqe_abts->xmit_sequence.wqe_com,
3319            LPFC_WQE_CQ_ID_DEFAULT);
3320     bf_set(wqe_cmd_type, &wqe_abts->xmit_sequence.wqe_com,
3321            OTHER_COMMAND);
3322
3323     abts_wqeq->vport = phba->pport;
3324     abts_wqeq->ndlp = ndlp;
3325     abts_wqeq->context_un.axchg = ctxp;
3326     abts_wqeq->bpl_dmabuf = NULL;
3327     abts_wqeq->num_bdes = 0;
3328     /* hba_wqidx should already be setup from command we are aborting */
3329     abts_wqeq->iocb.ulpCommand = CMD_XMIT_SEQUENCE64_CR;
3330     abts_wqeq->iocb.ulpLe = 1;
3331
3332     lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3333             "6069 Issue ABTS to xri x%x reqtag x%x\n",
3334             xri, abts_wqeq->iotag);
3335     return 1;
3336 }
3337
3338 static int
3339 lpfc_nvmet_sol_fcp_issue_abort(struct lpfc_hba *phba,
3340                    struct lpfc_async_xchg_ctx *ctxp,
3341                    uint32_t sid, uint16_t xri)
3342 {
3343     struct lpfc_nvmet_tgtport *tgtp;
3344     struct lpfc_iocbq *abts_wqeq;
3345     struct lpfc_nodelist *ndlp;
3346     unsigned long flags;
3347     bool ia;
3348     int rc;
3349
3350     tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3351     if (!ctxp->wqeq) {
3352         ctxp->wqeq = ctxp->ctxbuf->iocbq;
3353         ctxp->wqeq->hba_wqidx = 0;
3354     }
3355
3356     ndlp = lpfc_findnode_did(phba->pport, sid);
3357     if (!ndlp ||
3358         ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
3359         (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
3360         atomic_inc(&tgtp->xmt_abort_rsp_error);
3361         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3362                 "6160 Drop ABORT - wrong NDLP state x%x.\n",
3363                 (ndlp) ? ndlp->nlp_state : NLP_STE_MAX_STATE);
3364
3365         /* No failure to an ABTS request. */
3366         spin_lock_irqsave(&ctxp->ctxlock, flags);
3367         ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3368         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3369         return 0;
3370     }
3371
3372     /* Issue ABTS for this WQE based on iotag */
3373     ctxp->abort_wqeq = lpfc_sli_get_iocbq(phba);
3374     spin_lock_irqsave(&ctxp->ctxlock, flags);
3375     if (!ctxp->abort_wqeq) {
3376         atomic_inc(&tgtp->xmt_abort_rsp_error);
3377         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3378                 "6161 ABORT failed: No wqeqs: "
3379                 "xri: x%x\n", ctxp->oxid);
3380         /* No failure to an ABTS request. */
3381         ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3382         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3383         return 0;
3384     }
3385     abts_wqeq = ctxp->abort_wqeq;
3386     ctxp->state = LPFC_NVME_STE_ABORT;
3387     ia = (ctxp->flag & LPFC_NVME_ABTS_RCV) ? true : false;
3388     spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3389
3390     /* Announce entry to new IO submit field. */
3391     lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
3392             "6162 ABORT Request to rport DID x%06x "
3393             "for xri x%x x%x\n",
3394             ctxp->sid, ctxp->oxid, ctxp->wqeq->sli4_xritag);
3395
3396     /* If the hba is getting reset, this flag is set.  It is
3397      * cleared when the reset is complete and rings reestablished.
3398      */
3399     spin_lock_irqsave(&phba->hbalock, flags);
3400     /* driver queued commands are in process of being flushed */
3401     if (phba->hba_flag & HBA_IOQ_FLUSH) {
3402         spin_unlock_irqrestore(&phba->hbalock, flags);
3403         atomic_inc(&tgtp->xmt_abort_rsp_error);
3404         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3405                 "6163 Driver in reset cleanup - flushing "
3406                 "NVME Req now. hba_flag x%x oxid x%x\n",
3407                 phba->hba_flag, ctxp->oxid);
3408         lpfc_sli_release_iocbq(phba, abts_wqeq);
3409         spin_lock_irqsave(&ctxp->ctxlock, flags);
3410         ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3411         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3412         return 0;
3413     }
3414
3415     /* Outstanding abort is in progress */
3416     if (abts_wqeq->cmd_flag & LPFC_DRIVER_ABORTED) {
3417         spin_unlock_irqrestore(&phba->hbalock, flags);
3418         atomic_inc(&tgtp->xmt_abort_rsp_error);
3419         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3420                 "6164 Outstanding NVME I/O Abort Request "
3421                 "still pending on oxid x%x\n",
3422                 ctxp->oxid);
3423         lpfc_sli_release_iocbq(phba, abts_wqeq);
3424         spin_lock_irqsave(&ctxp->ctxlock, flags);
3425         ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3426         spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3427         return 0;
3428     }
3429
3430     /* Ready - mark outstanding as aborted by driver. */
3431     abts_wqeq->cmd_flag |= LPFC_DRIVER_ABORTED;
3432
3433     lpfc_sli_prep_abort_xri(phba, abts_wqeq, ctxp->wqeq->sli4_xritag,
3434                 abts_wqeq->iotag, CLASS3,
3435                 LPFC_WQE_CQ_ID_DEFAULT, ia, true);
3436
3437     /* ABTS WQE must go to the same WQ as the WQE to be aborted */
3438     abts_wqeq->hba_wqidx = ctxp->wqeq->hba_wqidx;
3439     abts_wqeq->cmd_cmpl = lpfc_nvmet_sol_fcp_abort_cmp;
3440     abts_wqeq->cmd_flag |= LPFC_IO_NVME;
3441     abts_wqeq->context_un.axchg = ctxp;
3442     abts_wqeq->vport = phba->pport;
3443     if (!ctxp->hdwq)
3444         ctxp->hdwq = &phba->sli4_hba.hdwq[abts_wqeq->hba_wqidx];
3445
3446     rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, abts_wqeq);
3447     spin_unlock_irqrestore(&phba->hbalock, flags);
3448     if (rc == WQE_SUCCESS) {
3449         atomic_inc(&tgtp->xmt_abort_sol);
3450         return 0;
3451     }
3452
3453     atomic_inc(&tgtp->xmt_abort_rsp_error);
3454     spin_lock_irqsave(&ctxp->ctxlock, flags);
3455     ctxp->flag &= ~LPFC_NVME_ABORT_OP;
3456     spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3457     lpfc_sli_release_iocbq(phba, abts_wqeq);
3458     lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3459             "6166 Failed ABORT issue_wqe with status x%x "
3460             "for oxid x%x.\n",
3461             rc, ctxp->oxid);
3462     return 1;
3463 }
3464
3465 static int
3466 lpfc_nvmet_unsol_fcp_issue_abort(struct lpfc_hba *phba,
3467                  struct lpfc_async_xchg_ctx *ctxp,
3468                  uint32_t sid, uint16_t xri)
3469 {
3470     struct lpfc_nvmet_tgtport *tgtp;
3471     struct lpfc_iocbq *abts_wqeq;
3472     unsigned long flags;
3473     bool released = false;
3474     int rc;
3475
3476     tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3477     if (!ctxp->wqeq) {
3478         ctxp->wqeq = ctxp->ctxbuf->iocbq;
3479         ctxp->wqeq->hba_wqidx = 0;
3480     }
3481
3482     if (ctxp->state == LPFC_NVME_STE_FREE) {
3483         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3484                 "6417 NVMET ABORT ctx freed %d %d oxid x%x\n",
3485                 ctxp->state, ctxp->entry_cnt, ctxp->oxid);
3486         rc = WQE_BUSY;
3487         goto aerr;
3488     }
3489     ctxp->state = LPFC_NVME_STE_ABORT;
3490     ctxp->entry_cnt++;
3491     rc = lpfc_nvmet_unsol_issue_abort(phba, ctxp, sid, xri);
3492     if (rc == 0)
3493         goto aerr;
3494
3495     spin_lock_irqsave(&phba->hbalock, flags);
3496     abts_wqeq = ctxp->wqeq;
3497     abts_wqeq->cmd_cmpl = lpfc_nvmet_unsol_fcp_abort_cmp;
3498     abts_wqeq->cmd_flag |= LPFC_IO_NVMET;
3499     if (!ctxp->hdwq)
3500         ctxp->hdwq = &phba->sli4_hba.hdwq[abts_wqeq->hba_wqidx];
3501
3502     rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, abts_wqeq);
3503     spin_unlock_irqrestore(&phba->hbalock, flags);
3504     if (rc == WQE_SUCCESS) {
3505         return 0;
3506     }
3507
3508 aerr:
3509     spin_lock_irqsave(&ctxp->ctxlock, flags);
3510     if (ctxp->flag & LPFC_NVME_CTX_RLS) {
3511         spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3512         list_del_init(&ctxp->list);
3513         spin_unlock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
3514         released = true;
3515     }
3516     ctxp->flag &= ~(LPFC_NVME_ABORT_OP | LPFC_NVME_CTX_RLS);
3517     spin_unlock_irqrestore(&ctxp->ctxlock, flags);
3518
3519     atomic_inc(&tgtp->xmt_abort_rsp_error);
3520     lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3521             "6135 Failed to Issue ABTS for oxid x%x. Status x%x "
3522             "(%x)\n",
3523             ctxp->oxid, rc, released);
3524     if (released)
3525         lpfc_nvmet_ctxbuf_post(phba, ctxp->ctxbuf);
3526     return 1;
3527 }
3528
3529 /**
3530  * lpfc_nvme_unsol_ls_issue_abort - issue ABTS on an exchange received
3531  *        via async frame receive where the frame is not handled.
3532  * @phba: pointer to adapter structure
3533  * @ctxp: pointer to the asynchronously received received sequence
3534  * @sid: address of the remote port to send the ABTS to
3535  * @xri: oxid value to for the ABTS (other side's exchange id).
3536  **/
3537 int
3538 lpfc_nvme_unsol_ls_issue_abort(struct lpfc_hba *phba,
3539                 struct lpfc_async_xchg_ctx *ctxp,
3540                 uint32_t sid, uint16_t xri)
3541 {
3542     struct lpfc_nvmet_tgtport *tgtp = NULL;
3543     struct lpfc_iocbq *abts_wqeq;
3544     unsigned long flags;
3545     int rc;
3546
3547     if ((ctxp->state == LPFC_NVME_STE_LS_RCV && ctxp->entry_cnt == 1) ||
3548         (ctxp->state == LPFC_NVME_STE_LS_RSP && ctxp->entry_cnt == 2)) {
3549         ctxp->state = LPFC_NVME_STE_LS_ABORT;
3550         ctxp->entry_cnt++;
3551     } else {
3552         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3553                 "6418 NVMET LS abort state mismatch "
3554                 "IO x%x: %d %d\n",
3555                 ctxp->oxid, ctxp->state, ctxp->entry_cnt);
3556         ctxp->state = LPFC_NVME_STE_LS_ABORT;
3557     }
3558
3559     if (phba->nvmet_support && phba->targetport)
3560         tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3561
3562     if (!ctxp->wqeq) {
3563         /* Issue ABTS for this WQE based on iotag */
3564         ctxp->wqeq = lpfc_sli_get_iocbq(phba);
3565         if (!ctxp->wqeq) {
3566             lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3567                     "6068 Abort failed: No wqeqs: "
3568                     "xri: x%x\n", xri);
3569             /* No failure to an ABTS request. */
3570             kfree(ctxp);
3571             return 0;
3572         }
3573     }
3574     abts_wqeq = ctxp->wqeq;
3575
3576     if (lpfc_nvmet_unsol_issue_abort(phba, ctxp, sid, xri) == 0) {
3577         rc = WQE_BUSY;
3578         goto out;
3579     }
3580
3581     spin_lock_irqsave(&phba->hbalock, flags);
3582     abts_wqeq->cmd_cmpl = lpfc_nvmet_xmt_ls_abort_cmp;
3583     abts_wqeq->cmd_flag |=  LPFC_IO_NVME_LS;
3584     rc = lpfc_sli4_issue_wqe(phba, ctxp->hdwq, abts_wqeq);
3585     spin_unlock_irqrestore(&phba->hbalock, flags);
3586     if (rc == WQE_SUCCESS) {
3587         if (tgtp)
3588             atomic_inc(&tgtp->xmt_abort_unsol);
3589         return 0;
3590     }
3591 out:
3592     if (tgtp)
3593         atomic_inc(&tgtp->xmt_abort_rsp_error);
3594     abts_wqeq->rsp_dmabuf = NULL;
3595     abts_wqeq->bpl_dmabuf = NULL;
3596     lpfc_sli_release_iocbq(phba, abts_wqeq);
3597     lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
3598             "6056 Failed to Issue ABTS. Status x%x\n", rc);
3599     return 1;
3600 }
3601
3602 /**
3603  * lpfc_nvmet_invalidate_host
3604  *
3605  * @phba: pointer to the driver instance bound to an adapter port.
3606  * @ndlp: pointer to an lpfc_nodelist type
3607  *
3608  * This routine upcalls the nvmet transport to invalidate an NVME
3609  * host to which this target instance had active connections.
3610  */
3611 void
3612 lpfc_nvmet_invalidate_host(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
3613 {
3614     u32 ndlp_has_hh;
3615     struct lpfc_nvmet_tgtport *tgtp;
3616
3617     lpfc_printf_log(phba, KERN_INFO,
3618             LOG_NVME | LOG_NVME_ABTS | LOG_NVME_DISC,
3619             "6203 Invalidating hosthandle x%px\n",
3620             ndlp);
3621
3622     tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
3623     atomic_set(&tgtp->state, LPFC_NVMET_INV_HOST_ACTIVE);
3624
3625     spin_lock_irq(&ndlp->lock);
3626     ndlp_has_hh = ndlp->fc4_xpt_flags & NLP_XPT_HAS_HH;
3627     spin_unlock_irq(&ndlp->lock);
3628
3629     /* Do not invalidate any nodes that do not have a hosthandle.
3630      * The host_release callbk will cause a node reference
3631      * count imbalance and a crash.
3632      */
3633     if (!ndlp_has_hh) {
3634         lpfc_printf_log(phba, KERN_INFO,
3635                 LOG_NVME | LOG_NVME_ABTS | LOG_NVME_DISC,
3636                 "6204 Skip invalidate on node x%px DID x%x\n",
3637                 ndlp, ndlp->nlp_DID);
3638         return;
3639     }
3640
3641 #if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
3642     /* Need to get the nvmet_fc_target_port pointer here.*/
3643     nvmet_fc_invalidate_host(phba->targetport, ndlp);
3644 #endif
3645 }