drivers/scsi/lpfc/lpfc_nvmet.h

   1 /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Fibre Channel Host Bus Adapters.                                *
   4  * Copyright (C) 2017 Broadcom. All Rights Reserved. The term      *
   5  * “Broadcom” refers to Broadcom Limited 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 #define LPFC_NVMET_DEFAULT_SEGS         (64 + 1)        /* 256K IOs */
  25 #define LPFC_NVMET_RQE_DEF_COUNT        512
  26 #define LPFC_NVMET_SUCCESS_LEN  12
  27
  28 #define LPFC_NVMET_MRQ_OFF              0xffff
  29 #define LPFC_NVMET_MRQ_AUTO             0
  30 #define LPFC_NVMET_MRQ_MAX              16
  31
  32 /* Used for NVME Target */
  33 struct lpfc_nvmet_tgtport {
  34         struct lpfc_hba *phba;
  35         struct completion tport_unreg_done;
  36
  37         /* Stats counters - lpfc_nvmet_unsol_ls_buffer */
  38         atomic_t rcv_ls_req_in;
  39         atomic_t rcv_ls_req_out;
  40         atomic_t rcv_ls_req_drop;
  41         atomic_t xmt_ls_abort;
  42         atomic_t xmt_ls_abort_cmpl;
  43
  44         /* Stats counters - lpfc_nvmet_xmt_ls_rsp */
  45         atomic_t xmt_ls_rsp;
  46         atomic_t xmt_ls_drop;
  47
  48         /* Stats counters - lpfc_nvmet_xmt_ls_rsp_cmp */
  49         atomic_t xmt_ls_rsp_error;
  50         atomic_t xmt_ls_rsp_aborted;
  51         atomic_t xmt_ls_rsp_xb_set;
  52         atomic_t xmt_ls_rsp_cmpl;
  53
  54         /* Stats counters - lpfc_nvmet_unsol_fcp_buffer */
  55         atomic_t rcv_fcp_cmd_in;
  56         atomic_t rcv_fcp_cmd_out;
  57         atomic_t rcv_fcp_cmd_drop;
  58         atomic_t rcv_fcp_cmd_defer;
  59         atomic_t xmt_fcp_release;
  60
  61         /* Stats counters - lpfc_nvmet_xmt_fcp_op */
  62         atomic_t xmt_fcp_drop;
  63         atomic_t xmt_fcp_read_rsp;
  64         atomic_t xmt_fcp_read;
  65         atomic_t xmt_fcp_write;
  66         atomic_t xmt_fcp_rsp;
  67
  68         /* Stats counters - lpfc_nvmet_xmt_fcp_op_cmp */
  69         atomic_t xmt_fcp_rsp_xb_set;
  70         atomic_t xmt_fcp_rsp_cmpl;
  71         atomic_t xmt_fcp_rsp_error;
  72         atomic_t xmt_fcp_rsp_aborted;
  73         atomic_t xmt_fcp_rsp_drop;
  74
  75
  76         /* Stats counters - lpfc_nvmet_xmt_fcp_abort */
  77         atomic_t xmt_fcp_xri_abort_cqe;
  78         atomic_t xmt_fcp_abort;
  79         atomic_t xmt_fcp_abort_cmpl;
  80         atomic_t xmt_abort_sol;
  81         atomic_t xmt_abort_unsol;
  82         atomic_t xmt_abort_rsp;
  83         atomic_t xmt_abort_rsp_error;
  84 };
  85
  86 struct lpfc_nvmet_ctx_info {
  87         struct list_head nvmet_ctx_list;
  88         spinlock_t      nvmet_ctx_list_lock; /* lock per CPU */
  89         struct lpfc_nvmet_ctx_info *nvmet_ctx_next_cpu;
  90         struct lpfc_nvmet_ctx_info *nvmet_ctx_start_cpu;
  91         uint16_t        nvmet_ctx_list_cnt;
  92         char pad[16];  /* pad to a cache-line */
  93 };
  94
  95 /* This retrieves the context info associated with the specified cpu / mrq */
  96 #define lpfc_get_ctx_list(phba, cpu, mrq)  \
  97         (phba->sli4_hba.nvmet_ctx_info + ((cpu * phba->cfg_nvmet_mrq) + mrq))
  98
  99 struct lpfc_nvmet_rcv_ctx {
 100         union {
 101                 struct nvmefc_tgt_ls_req ls_req;
 102                 struct nvmefc_tgt_fcp_req fcp_req;
 103         } ctx;
 104         struct list_head list;
 105         struct lpfc_hba *phba;
 106         struct lpfc_iocbq *wqeq;
 107         struct lpfc_iocbq *abort_wqeq;
 108         dma_addr_t txrdy_phys;
 109         spinlock_t ctxlock; /* protect flag access */
 110         uint32_t *txrdy;
 111         uint32_t sid;
 112         uint32_t offset;
 113         uint16_t oxid;
 114         uint16_t size;
 115         uint16_t entry_cnt;
 116         uint16_t cpu;
 117         uint16_t idx;
 118         uint16_t state;
 119         /* States */
 120 #define LPFC_NVMET_STE_LS_RCV           1
 121 #define LPFC_NVMET_STE_LS_ABORT         2
 122 #define LPFC_NVMET_STE_LS_RSP           3
 123 #define LPFC_NVMET_STE_RCV              4
 124 #define LPFC_NVMET_STE_DATA             5
 125 #define LPFC_NVMET_STE_ABORT            6
 126 #define LPFC_NVMET_STE_DONE             7
 127 #define LPFC_NVMET_STE_FREE             0xff
 128         uint16_t flag;
 129 #define LPFC_NVMET_IO_INP               0x1  /* IO is in progress on exchange */
 130 #define LPFC_NVMET_ABORT_OP             0x2  /* Abort WQE issued on exchange */
 131 #define LPFC_NVMET_XBUSY                0x4  /* XB bit set on IO cmpl */
 132 #define LPFC_NVMET_CTX_RLS              0x8  /* ctx free requested */
 133 #define LPFC_NVMET_ABTS_RCV             0x10  /* ABTS received on exchange */
 134 #define LPFC_NVMET_DEFER_RCV_REPOST     0x20  /* repost to RQ on defer rcv */
 135         struct rqb_dmabuf *rqb_buffer;
 136         struct lpfc_nvmet_ctxbuf *ctxbuf;
 137
 138 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 139         uint64_t ts_isr_cmd;
 140         uint64_t ts_cmd_nvme;
 141         uint64_t ts_nvme_data;
 142         uint64_t ts_data_wqput;
 143         uint64_t ts_isr_data;
 144         uint64_t ts_data_nvme;
 145         uint64_t ts_nvme_status;
 146         uint64_t ts_status_wqput;
 147         uint64_t ts_isr_status;
 148         uint64_t ts_status_nvme;
 149 #endif
 150 };