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) 2017-2018 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 #define LPFC_NVMET_DEFAULT_SEGS         (64 + 1)        /* 256K IOs */
  25 #define LPFC_NVMET_RQE_MIN_POST         128
  26 #define LPFC_NVMET_RQE_DEF_POST         512
  27 #define LPFC_NVMET_RQE_DEF_COUNT        2048
  28 #define LPFC_NVMET_SUCCESS_LEN          12
  29
  30 #define LPFC_NVMET_MRQ_OFF              0xffff
  31 #define LPFC_NVMET_MRQ_AUTO             0
  32 #define LPFC_NVMET_MRQ_MAX              16
  33
  34 /* Used for NVME Target */
  35 struct lpfc_nvmet_tgtport {
  36         struct lpfc_hba *phba;
  37         struct completion *tport_unreg_cmp;
  38
  39         /* Stats counters - lpfc_nvmet_unsol_ls_buffer */
  40         atomic_t rcv_ls_req_in;
  41         atomic_t rcv_ls_req_out;
  42         atomic_t rcv_ls_req_drop;
  43         atomic_t xmt_ls_abort;
  44         atomic_t xmt_ls_abort_cmpl;
  45
  46         /* Stats counters - lpfc_nvmet_xmt_ls_rsp */
  47         atomic_t xmt_ls_rsp;
  48         atomic_t xmt_ls_drop;
  49
  50         /* Stats counters - lpfc_nvmet_xmt_ls_rsp_cmp */
  51         atomic_t xmt_ls_rsp_error;
  52         atomic_t xmt_ls_rsp_aborted;
  53         atomic_t xmt_ls_rsp_xb_set;
  54         atomic_t xmt_ls_rsp_cmpl;
  55
  56         /* Stats counters - lpfc_nvmet_unsol_fcp_buffer */
  57         atomic_t rcv_fcp_cmd_in;
  58         atomic_t rcv_fcp_cmd_out;
  59         atomic_t rcv_fcp_cmd_drop;
  60         atomic_t rcv_fcp_cmd_defer;
  61         atomic_t xmt_fcp_release;
  62
  63         /* Stats counters - lpfc_nvmet_xmt_fcp_op */
  64         atomic_t xmt_fcp_drop;
  65         atomic_t xmt_fcp_read_rsp;
  66         atomic_t xmt_fcp_read;
  67         atomic_t xmt_fcp_write;
  68         atomic_t xmt_fcp_rsp;
  69
  70         /* Stats counters - lpfc_nvmet_xmt_fcp_op_cmp */
  71         atomic_t xmt_fcp_rsp_xb_set;
  72         atomic_t xmt_fcp_rsp_cmpl;
  73         atomic_t xmt_fcp_rsp_error;
  74         atomic_t xmt_fcp_rsp_aborted;
  75         atomic_t xmt_fcp_rsp_drop;
  76
  77         /* Stats counters - lpfc_nvmet_xmt_fcp_abort */
  78         atomic_t xmt_fcp_xri_abort_cqe;
  79         atomic_t xmt_fcp_abort;
  80         atomic_t xmt_fcp_abort_cmpl;
  81         atomic_t xmt_abort_sol;
  82         atomic_t xmt_abort_unsol;
  83         atomic_t xmt_abort_rsp;
  84         atomic_t xmt_abort_rsp_error;
  85
  86         /* Stats counters - defer IO */
  87         atomic_t defer_ctx;
  88         atomic_t defer_fod;
  89         atomic_t defer_wqfull;
  90 };
  91
  92 struct lpfc_nvmet_ctx_info {
  93         struct list_head nvmet_ctx_list;
  94         spinlock_t      nvmet_ctx_list_lock; /* lock per CPU */
  95         struct lpfc_nvmet_ctx_info *nvmet_ctx_next_cpu;
  96         struct lpfc_nvmet_ctx_info *nvmet_ctx_start_cpu;
  97         uint16_t        nvmet_ctx_list_cnt;
  98         char pad[16];  /* pad to a cache-line */
  99 };
 100
 101 /* This retrieves the context info associated with the specified cpu / mrq */
 102 #define lpfc_get_ctx_list(phba, cpu, mrq)  \
 103         (phba->sli4_hba.nvmet_ctx_info + ((cpu * phba->cfg_nvmet_mrq) + mrq))
 104
 105 struct lpfc_nvmet_rcv_ctx {
 106         union {
 107                 struct nvmefc_tgt_ls_req ls_req;
 108                 struct nvmefc_tgt_fcp_req fcp_req;
 109         } ctx;
 110         struct list_head list;
 111         struct lpfc_hba *phba;
 112         struct lpfc_iocbq *wqeq;
 113         struct lpfc_iocbq *abort_wqeq;
 114         dma_addr_t txrdy_phys;
 115         spinlock_t ctxlock; /* protect flag access */
 116         uint32_t *txrdy;
 117         uint32_t sid;
 118         uint32_t offset;
 119         uint16_t oxid;
 120         uint16_t size;
 121         uint16_t entry_cnt;
 122         uint16_t cpu;
 123         uint16_t idx;
 124         uint16_t state;
 125         /* States */
 126 #define LPFC_NVMET_STE_LS_RCV           1
 127 #define LPFC_NVMET_STE_LS_ABORT         2
 128 #define LPFC_NVMET_STE_LS_RSP           3
 129 #define LPFC_NVMET_STE_RCV              4
 130 #define LPFC_NVMET_STE_DATA             5
 131 #define LPFC_NVMET_STE_ABORT            6
 132 #define LPFC_NVMET_STE_DONE             7
 133 #define LPFC_NVMET_STE_FREE             0xff
 134         uint16_t flag;
 135 #define LPFC_NVMET_IO_INP               0x1  /* IO is in progress on exchange */
 136 #define LPFC_NVMET_ABORT_OP             0x2  /* Abort WQE issued on exchange */
 137 #define LPFC_NVMET_XBUSY                0x4  /* XB bit set on IO cmpl */
 138 #define LPFC_NVMET_CTX_RLS              0x8  /* ctx free requested */
 139 #define LPFC_NVMET_ABTS_RCV             0x10  /* ABTS received on exchange */
 140 #define LPFC_NVMET_DEFER_WQFULL         0x40  /* Waiting on a free WQE */
 141         struct rqb_dmabuf *rqb_buffer;
 142         struct lpfc_nvmet_ctxbuf *ctxbuf;
 143
 144 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 145         uint64_t ts_isr_cmd;
 146         uint64_t ts_cmd_nvme;
 147         uint64_t ts_nvme_data;
 148         uint64_t ts_data_wqput;
 149         uint64_t ts_isr_data;
 150         uint64_t ts_data_nvme;
 151         uint64_t ts_nvme_status;
 152         uint64_t ts_status_wqput;
 153         uint64_t ts_isr_status;
 154         uint64_t ts_status_nvme;
 155 #endif
 156 };