257 lines
8.2 KiB
C
257 lines
8.2 KiB
C
/*******************************************************************
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* This file is part of the Emulex Linux Device Driver for *
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* Fibre Channel Host Bus Adapters. *
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* Copyright (C) 2017-2020 Broadcom. All Rights Reserved. The term *
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* “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. *
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* Copyright (C) 2004-2016 Emulex. All rights reserved. *
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* EMULEX and SLI are trademarks of Emulex. *
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* www.broadcom.com *
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* Portions Copyright (C) 2004-2005 Christoph Hellwig *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of version 2 of the GNU General *
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* Public License as published by the Free Software Foundation. *
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* This program is distributed in the hope that it will be useful. *
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* ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
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* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
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* FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
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* DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
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* TO BE LEGALLY INVALID. See the GNU General Public License for *
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* more details, a copy of which can be found in the file COPYING *
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* included with this package. *
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********************************************************************/
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#include <linux/nvme.h>
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#include <linux/nvme-fc-driver.h>
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#include <linux/nvme-fc.h>
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#define LPFC_NVME_DEFAULT_SEGS (64 + 1) /* 256K IOs */
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#define LPFC_NVME_ERSP_LEN 0x20
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#define LPFC_NVME_WAIT_TMO 10
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#define LPFC_NVME_EXPEDITE_XRICNT 8
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#define LPFC_NVME_FB_SHIFT 9
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#define LPFC_NVME_MAX_FB (1 << 20) /* 1M */
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#define LPFC_MAX_NVME_INFO_TMP_LEN 100
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#define LPFC_NVME_INFO_MORE_STR "\nCould be more info...\n"
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#define lpfc_ndlp_get_nrport(ndlp) \
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((!ndlp->nrport || (ndlp->fc4_xpt_flags & NLP_WAIT_FOR_UNREG)) \
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? NULL : ndlp->nrport)
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struct lpfc_nvme_qhandle {
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uint32_t index; /* WQ index to use */
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uint32_t qidx; /* queue index passed to create */
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uint32_t cpu_id; /* current cpu id at time of create */
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};
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/* Declare nvme-based local and remote port definitions. */
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struct lpfc_nvme_lport {
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struct lpfc_vport *vport;
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struct completion *lport_unreg_cmp;
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/* Add stats counters here */
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atomic_t fc4NvmeLsRequests;
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atomic_t fc4NvmeLsCmpls;
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atomic_t xmt_fcp_noxri;
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atomic_t xmt_fcp_bad_ndlp;
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atomic_t xmt_fcp_qdepth;
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atomic_t xmt_fcp_wqerr;
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atomic_t xmt_fcp_err;
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atomic_t xmt_fcp_abort;
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atomic_t xmt_ls_abort;
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atomic_t xmt_ls_err;
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atomic_t cmpl_fcp_xb;
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atomic_t cmpl_fcp_err;
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atomic_t cmpl_ls_xb;
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atomic_t cmpl_ls_err;
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};
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struct lpfc_nvme_rport {
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struct lpfc_nvme_lport *lport;
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struct nvme_fc_remote_port *remoteport;
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struct lpfc_nodelist *ndlp;
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struct completion rport_unreg_done;
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};
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struct lpfc_nvme_fcpreq_priv {
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struct lpfc_io_buf *nvme_buf;
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};
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/*
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* set NVME LS request timeouts to 30s. It is larger than the 2*R_A_TOV
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* set by the spec, which appears to have issues with some devices.
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*/
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#define LPFC_NVME_LS_TIMEOUT 30
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#define LPFC_NVMET_DEFAULT_SEGS (64 + 1) /* 256K IOs */
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#define LPFC_NVMET_RQE_MIN_POST 128
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#define LPFC_NVMET_RQE_DEF_POST 512
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#define LPFC_NVMET_RQE_DEF_COUNT 2048
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#define LPFC_NVMET_SUCCESS_LEN 12
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#define LPFC_NVMET_MRQ_AUTO 0
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#define LPFC_NVMET_MRQ_MAX 16
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#define LPFC_NVMET_WAIT_TMO (5 * MSEC_PER_SEC)
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/* Used for NVME Target */
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#define LPFC_NVMET_INV_HOST_ACTIVE 1
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struct lpfc_nvmet_tgtport {
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struct lpfc_hba *phba;
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struct completion *tport_unreg_cmp;
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atomic_t state; /* tracks nvmet hosthandle invalidation */
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/* Stats counters - lpfc_nvmet_unsol_ls_buffer */
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atomic_t rcv_ls_req_in;
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atomic_t rcv_ls_req_out;
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atomic_t rcv_ls_req_drop;
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atomic_t xmt_ls_abort;
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atomic_t xmt_ls_abort_cmpl;
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/* Stats counters - lpfc_nvmet_xmt_ls_rsp */
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atomic_t xmt_ls_rsp;
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atomic_t xmt_ls_drop;
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/* Stats counters - lpfc_nvmet_xmt_ls_rsp_cmp */
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atomic_t xmt_ls_rsp_error;
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atomic_t xmt_ls_rsp_aborted;
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atomic_t xmt_ls_rsp_xb_set;
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atomic_t xmt_ls_rsp_cmpl;
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/* Stats counters - lpfc_nvmet_unsol_fcp_buffer */
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atomic_t rcv_fcp_cmd_in;
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atomic_t rcv_fcp_cmd_out;
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atomic_t rcv_fcp_cmd_drop;
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atomic_t rcv_fcp_cmd_defer;
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atomic_t xmt_fcp_release;
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/* Stats counters - lpfc_nvmet_xmt_fcp_op */
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atomic_t xmt_fcp_drop;
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atomic_t xmt_fcp_read_rsp;
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atomic_t xmt_fcp_read;
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atomic_t xmt_fcp_write;
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atomic_t xmt_fcp_rsp;
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/* Stats counters - lpfc_nvmet_xmt_fcp_op_cmp */
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atomic_t xmt_fcp_rsp_xb_set;
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atomic_t xmt_fcp_rsp_cmpl;
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atomic_t xmt_fcp_rsp_error;
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atomic_t xmt_fcp_rsp_aborted;
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atomic_t xmt_fcp_rsp_drop;
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/* Stats counters - lpfc_nvmet_xmt_fcp_abort */
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atomic_t xmt_fcp_xri_abort_cqe;
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atomic_t xmt_fcp_abort;
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atomic_t xmt_fcp_abort_cmpl;
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atomic_t xmt_abort_sol;
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atomic_t xmt_abort_unsol;
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atomic_t xmt_abort_rsp;
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atomic_t xmt_abort_rsp_error;
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/* Stats counters - defer IO */
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atomic_t defer_ctx;
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atomic_t defer_fod;
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atomic_t defer_wqfull;
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};
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struct lpfc_nvmet_ctx_info {
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struct list_head nvmet_ctx_list;
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spinlock_t nvmet_ctx_list_lock; /* lock per CPU */
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struct lpfc_nvmet_ctx_info *nvmet_ctx_next_cpu;
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struct lpfc_nvmet_ctx_info *nvmet_ctx_start_cpu;
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uint16_t nvmet_ctx_list_cnt;
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char pad[16]; /* pad to a cache-line */
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};
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/* This retrieves the context info associated with the specified cpu / mrq */
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#define lpfc_get_ctx_list(phba, cpu, mrq) \
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(phba->sli4_hba.nvmet_ctx_info + ((cpu * phba->cfg_nvmet_mrq) + mrq))
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/* Values for state field of struct lpfc_async_xchg_ctx */
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#define LPFC_NVME_STE_LS_RCV 1
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#define LPFC_NVME_STE_LS_ABORT 2
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#define LPFC_NVME_STE_LS_RSP 3
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#define LPFC_NVME_STE_RCV 4
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#define LPFC_NVME_STE_DATA 5
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#define LPFC_NVME_STE_ABORT 6
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#define LPFC_NVME_STE_DONE 7
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#define LPFC_NVME_STE_FREE 0xff
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/* Values for flag field of struct lpfc_async_xchg_ctx */
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#define LPFC_NVME_IO_INP 0x1 /* IO is in progress on exchange */
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#define LPFC_NVME_ABORT_OP 0x2 /* Abort WQE issued on exchange */
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#define LPFC_NVME_XBUSY 0x4 /* XB bit set on IO cmpl */
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#define LPFC_NVME_CTX_RLS 0x8 /* ctx free requested */
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#define LPFC_NVME_ABTS_RCV 0x10 /* ABTS received on exchange */
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#define LPFC_NVME_CTX_REUSE_WQ 0x20 /* ctx reused via WQ */
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#define LPFC_NVME_DEFER_WQFULL 0x40 /* Waiting on a free WQE */
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#define LPFC_NVME_TNOTIFY 0x80 /* notify transport of abts */
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struct lpfc_async_xchg_ctx {
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union {
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struct nvmefc_tgt_fcp_req fcp_req;
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} hdlrctx;
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struct list_head list;
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struct lpfc_hba *phba;
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struct lpfc_nodelist *ndlp;
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struct nvmefc_ls_req *ls_req;
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struct nvmefc_ls_rsp ls_rsp;
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struct lpfc_iocbq *wqeq;
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struct lpfc_iocbq *abort_wqeq;
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spinlock_t ctxlock; /* protect flag access */
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uint32_t sid;
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uint32_t offset;
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uint16_t oxid;
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uint16_t size;
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uint16_t entry_cnt;
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uint16_t cpu;
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uint16_t idx;
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uint16_t state;
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uint16_t flag;
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void *payload;
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struct rqb_dmabuf *rqb_buffer;
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struct lpfc_nvmet_ctxbuf *ctxbuf;
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struct lpfc_sli4_hdw_queue *hdwq;
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#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
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uint64_t ts_isr_cmd;
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uint64_t ts_cmd_nvme;
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uint64_t ts_nvme_data;
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uint64_t ts_data_wqput;
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uint64_t ts_isr_data;
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uint64_t ts_data_nvme;
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uint64_t ts_nvme_status;
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uint64_t ts_status_wqput;
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uint64_t ts_isr_status;
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uint64_t ts_status_nvme;
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#endif
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};
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/* routines found in lpfc_nvme.c */
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int __lpfc_nvme_ls_req(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
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struct nvmefc_ls_req *pnvme_lsreq,
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void (*gen_req_cmp)(struct lpfc_hba *phba,
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struct lpfc_iocbq *cmdwqe,
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struct lpfc_wcqe_complete *wcqe));
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void __lpfc_nvme_ls_req_cmp(struct lpfc_hba *phba, struct lpfc_vport *vport,
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struct lpfc_iocbq *cmdwqe, struct lpfc_wcqe_complete *wcqe);
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int __lpfc_nvme_ls_abort(struct lpfc_vport *vport,
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struct lpfc_nodelist *ndlp, struct nvmefc_ls_req *pnvme_lsreq);
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/* routines found in lpfc_nvmet.c */
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int lpfc_nvme_unsol_ls_issue_abort(struct lpfc_hba *phba,
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struct lpfc_async_xchg_ctx *ctxp, uint32_t sid,
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uint16_t xri);
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int __lpfc_nvme_xmt_ls_rsp(struct lpfc_async_xchg_ctx *axchg,
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struct nvmefc_ls_rsp *ls_rsp,
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void (*xmt_ls_rsp_cmp)(struct lpfc_hba *phba,
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struct lpfc_iocbq *cmdwqe,
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struct lpfc_wcqe_complete *wcqe));
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void __lpfc_nvme_xmt_ls_rsp_cmp(struct lpfc_hba *phba,
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struct lpfc_iocbq *cmdwqe, struct lpfc_wcqe_complete *wcqe);
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