LXR linux/drivers/scsi/lpfc/lpfc

   1/*******************************************************************
   2 * This file is part of the Emulex Linux Device Driver for         *
   3 * Fibre Channel Host Bus Adapters.                                *
   4 * Copyright (C) 2017-2019 Broadcom. All Rights Reserved. The term *
   5 * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.  *
   6 * Copyright (C) 2004-2016 Emulex.  All rights reserved.           *
   7 * EMULEX and SLI are trademarks of Emulex.                        *
   8 * www.broadcom.com                                                *
   9 * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
  10 *                                                                 *
  11 * This program is free software; you can redistribute it and/or   *
  12 * modify it under the terms of version 2 of the GNU General       *
  13 * Public License as published by the Free Software Foundation.    *
  14 * This program is distributed in the hope that it will be useful. *
  15 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  16 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  17 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  18 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  19 * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  20 * more details, a copy of which can be found in the file COPYING  *
  21 * included with this package.                                     *
  22 ********************************************************************/
  23
  24#include <linux/nvme.h>
  25#include <linux/nvme-fc-driver.h>
  26#include <linux/nvme-fc.h>
  27
  28#define LPFC_NVME_DEFAULT_SEGS          (64 + 1)        /* 256K IOs */
  29
  30#define LPFC_NVME_ERSP_LEN              0x20
  31
  32#define LPFC_NVME_WAIT_TMO              10
  33#define LPFC_NVME_EXPEDITE_XRICNT       8
  34#define LPFC_NVME_FB_SHIFT              9
  35#define LPFC_NVME_MAX_FB                (1 << 20)       /* 1M */
  36
  37#define LPFC_MAX_NVME_INFO_TMP_LEN      100
  38#define LPFC_NVME_INFO_MORE_STR         "\nCould be more info...\n"
  39
  40#define lpfc_ndlp_get_nrport(ndlp)                                      \
  41        ((!ndlp->nrport || (ndlp->upcall_flags & NLP_WAIT_FOR_UNREG))   \
  42        ? NULL : ndlp->nrport)
  43
  44struct lpfc_nvme_qhandle {
  45        uint32_t index;         /* WQ index to use */
  46        uint32_t qidx;          /* queue index passed to create */
  47        uint32_t cpu_id;        /* current cpu id at time of create */
  48};
  49
  50/* Declare nvme-based local and remote port definitions. */
  51struct lpfc_nvme_lport {
  52        struct lpfc_vport *vport;
  53        struct completion *lport_unreg_cmp;
  54        /* Add stats counters here */
  55        atomic_t fc4NvmeLsRequests;
  56        atomic_t fc4NvmeLsCmpls;
  57        atomic_t xmt_fcp_noxri;
  58        atomic_t xmt_fcp_bad_ndlp;
  59        atomic_t xmt_fcp_qdepth;
  60        atomic_t xmt_fcp_wqerr;
  61        atomic_t xmt_fcp_err;
  62        atomic_t xmt_fcp_abort;
  63        atomic_t xmt_ls_abort;
  64        atomic_t xmt_ls_err;
  65        atomic_t cmpl_fcp_xb;
  66        atomic_t cmpl_fcp_err;
  67        atomic_t cmpl_ls_xb;
  68        atomic_t cmpl_ls_err;
  69};
  70
  71struct lpfc_nvme_rport {
  72        struct lpfc_nvme_lport *lport;
  73        struct nvme_fc_remote_port *remoteport;
  74        struct lpfc_nodelist *ndlp;
  75        struct completion rport_unreg_done;
  76};
  77
  78struct lpfc_nvme_fcpreq_priv {
  79        struct lpfc_io_buf *nvme_buf;
  80};
  81
  82/*
  83 * set NVME LS request timeouts to 30s. It is larger than the 2*R_A_TOV
  84 * set by the spec, which appears to have issues with some devices.
  85 */
  86#define LPFC_NVME_LS_TIMEOUT            30
  87
  88
  89#define LPFC_NVMET_DEFAULT_SEGS         (64 + 1)        /* 256K IOs */
  90#define LPFC_NVMET_RQE_MIN_POST         128
  91#define LPFC_NVMET_RQE_DEF_POST         512
  92#define LPFC_NVMET_RQE_DEF_COUNT        2048
  93#define LPFC_NVMET_SUCCESS_LEN          12
  94
  95#define LPFC_NVMET_MRQ_AUTO             0
  96#define LPFC_NVMET_MRQ_MAX              16
  97
  98#define LPFC_NVMET_WAIT_TMO             (5 * MSEC_PER_SEC)
  99
 100/* Used for NVME Target */
 101#define LPFC_NVMET_INV_HOST_ACTIVE      1
 102
 103struct lpfc_nvmet_tgtport {
 104        struct lpfc_hba *phba;
 105        struct completion *tport_unreg_cmp;
 106        atomic_t state;         /* tracks nvmet hosthandle invalidation */
 107
 108        /* Stats counters - lpfc_nvmet_unsol_ls_buffer */
 109        atomic_t rcv_ls_req_in;
 110        atomic_t rcv_ls_req_out;
 111        atomic_t rcv_ls_req_drop;
 112        atomic_t xmt_ls_abort;
 113        atomic_t xmt_ls_abort_cmpl;
 114
 115        /* Stats counters - lpfc_nvmet_xmt_ls_rsp */
 116        atomic_t xmt_ls_rsp;
 117        atomic_t xmt_ls_drop;
 118
 119        /* Stats counters - lpfc_nvmet_xmt_ls_rsp_cmp */
 120        atomic_t xmt_ls_rsp_error;
 121        atomic_t xmt_ls_rsp_aborted;
 122        atomic_t xmt_ls_rsp_xb_set;
 123        atomic_t xmt_ls_rsp_cmpl;
 124
 125        /* Stats counters - lpfc_nvmet_unsol_fcp_buffer */
 126        atomic_t rcv_fcp_cmd_in;
 127        atomic_t rcv_fcp_cmd_out;
 128        atomic_t rcv_fcp_cmd_drop;
 129        atomic_t rcv_fcp_cmd_defer;
 130        atomic_t xmt_fcp_release;
 131
 132        /* Stats counters - lpfc_nvmet_xmt_fcp_op */
 133        atomic_t xmt_fcp_drop;
 134        atomic_t xmt_fcp_read_rsp;
 135        atomic_t xmt_fcp_read;
 136        atomic_t xmt_fcp_write;
 137        atomic_t xmt_fcp_rsp;
 138
 139        /* Stats counters - lpfc_nvmet_xmt_fcp_op_cmp */
 140        atomic_t xmt_fcp_rsp_xb_set;
 141        atomic_t xmt_fcp_rsp_cmpl;
 142        atomic_t xmt_fcp_rsp_error;
 143        atomic_t xmt_fcp_rsp_aborted;
 144        atomic_t xmt_fcp_rsp_drop;
 145
 146        /* Stats counters - lpfc_nvmet_xmt_fcp_abort */
 147        atomic_t xmt_fcp_xri_abort_cqe;
 148        atomic_t xmt_fcp_abort;
 149        atomic_t xmt_fcp_abort_cmpl;
 150        atomic_t xmt_abort_sol;
 151        atomic_t xmt_abort_unsol;
 152        atomic_t xmt_abort_rsp;
 153        atomic_t xmt_abort_rsp_error;
 154
 155        /* Stats counters - defer IO */
 156        atomic_t defer_ctx;
 157        atomic_t defer_fod;
 158        atomic_t defer_wqfull;
 159};
 160
 161struct lpfc_nvmet_ctx_info {
 162        struct list_head nvmet_ctx_list;
 163        spinlock_t      nvmet_ctx_list_lock; /* lock per CPU */
 164        struct lpfc_nvmet_ctx_info *nvmet_ctx_next_cpu;
 165        struct lpfc_nvmet_ctx_info *nvmet_ctx_start_cpu;
 166        uint16_t        nvmet_ctx_list_cnt;
 167        char pad[16];  /* pad to a cache-line */
 168};
 169
 170/* This retrieves the context info associated with the specified cpu / mrq */
 171#define lpfc_get_ctx_list(phba, cpu, mrq)  \
 172        (phba->sli4_hba.nvmet_ctx_info + ((cpu * phba->cfg_nvmet_mrq) + mrq))
 173
 174/* Values for state field of struct lpfc_async_xchg_ctx */
 175#define LPFC_NVME_STE_LS_RCV            1
 176#define LPFC_NVME_STE_LS_ABORT          2
 177#define LPFC_NVME_STE_LS_RSP            3
 178#define LPFC_NVME_STE_RCV               4
 179#define LPFC_NVME_STE_DATA              5
 180#define LPFC_NVME_STE_ABORT             6
 181#define LPFC_NVME_STE_DONE              7
 182#define LPFC_NVME_STE_FREE              0xff
 183
 184/* Values for flag field of struct lpfc_async_xchg_ctx */
 185#define LPFC_NVME_IO_INP                0x1  /* IO is in progress on exchange */
 186#define LPFC_NVME_ABORT_OP              0x2  /* Abort WQE issued on exchange */
 187#define LPFC_NVME_XBUSY                 0x4  /* XB bit set on IO cmpl */
 188#define LPFC_NVME_CTX_RLS               0x8  /* ctx free requested */
 189#define LPFC_NVME_ABTS_RCV              0x10  /* ABTS received on exchange */
 190#define LPFC_NVME_CTX_REUSE_WQ          0x20  /* ctx reused via WQ */
 191#define LPFC_NVME_DEFER_WQFULL          0x40  /* Waiting on a free WQE */
 192#define LPFC_NVME_TNOTIFY               0x80  /* notify transport of abts */
 193
 194struct lpfc_async_xchg_ctx {
 195        union {
 196                struct nvmefc_tgt_fcp_req fcp_req;
 197        } hdlrctx;
 198        struct list_head list;
 199        struct lpfc_hba *phba;
 200        struct lpfc_nodelist *ndlp;
 201        struct nvmefc_ls_req *ls_req;
 202        struct nvmefc_ls_rsp ls_rsp;
 203        struct lpfc_iocbq *wqeq;
 204        struct lpfc_iocbq *abort_wqeq;
 205        spinlock_t ctxlock; /* protect flag access */
 206        uint32_t sid;
 207        uint32_t offset;
 208        uint16_t oxid;
 209        uint16_t size;
 210        uint16_t entry_cnt;
 211        uint16_t cpu;
 212        uint16_t idx;
 213        uint16_t state;
 214        uint16_t flag;
 215        void *payload;
 216        struct rqb_dmabuf *rqb_buffer;
 217        struct lpfc_nvmet_ctxbuf *ctxbuf;
 218        struct lpfc_sli4_hdw_queue *hdwq;
 219
 220#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 221        uint64_t ts_isr_cmd;
 222        uint64_t ts_cmd_nvme;
 223        uint64_t ts_nvme_data;
 224        uint64_t ts_data_wqput;
 225        uint64_t ts_isr_data;
 226        uint64_t ts_data_nvme;
 227        uint64_t ts_nvme_status;
 228        uint64_t ts_status_wqput;
 229        uint64_t ts_isr_status;
 230        uint64_t ts_status_nvme;
 231#endif
 232};
 233
 234
 235/* routines found in lpfc_nvme.c */
 236int __lpfc_nvme_ls_req(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 237                struct nvmefc_ls_req *pnvme_lsreq,
 238                void (*gen_req_cmp)(struct lpfc_hba *phba,
 239                                struct lpfc_iocbq *cmdwqe,
 240                                struct lpfc_wcqe_complete *wcqe));
 241void __lpfc_nvme_ls_req_cmp(struct lpfc_hba *phba,  struct lpfc_vport *vport,
 242                struct lpfc_iocbq *cmdwqe, struct lpfc_wcqe_complete *wcqe);
 243int __lpfc_nvme_ls_abort(struct lpfc_vport *vport,
 244                struct lpfc_nodelist *ndlp, struct nvmefc_ls_req *pnvme_lsreq);
 245
 246/* routines found in lpfc_nvmet.c */
 247int lpfc_nvme_unsol_ls_issue_abort(struct lpfc_hba *phba,
 248                        struct lpfc_async_xchg_ctx *ctxp, uint32_t sid,
 249                        uint16_t xri);
 250int __lpfc_nvme_xmt_ls_rsp(struct lpfc_async_xchg_ctx *axchg,
 251                        struct nvmefc_ls_rsp *ls_rsp,
 252                        void (*xmt_ls_rsp_cmp)(struct lpfc_hba *phba,
 253                                struct lpfc_iocbq *cmdwqe,
 254                                struct lpfc_wcqe_complete *wcqe));
 255void __lpfc_nvme_xmt_ls_rsp_cmp(struct lpfc_hba *phba,
 256                struct lpfc_iocbq *cmdwqe, struct lpfc_wcqe_complete *wcqe);
 257