drivers/scsi/lpfc/lpfc_scsi.h

   1 /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Fibre Channel Host Bus Adapters.                                *
   4  * Copyright (C) 2004-2015 Emulex.  All rights reserved.           *
   5  * EMULEX and SLI are trademarks of Emulex.                        *
   6  * www.emulex.com                                                  *
   7  *                                                                 *
   8  * This program is free software; you can redistribute it and/or   *
   9  * modify it under the terms of version 2 of the GNU General       *
  10  * Public License as published by the Free Software Foundation.    *
  11  * This program is distributed in the hope that it will be useful. *
  12  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  13  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  14  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  15  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  16  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  17  * more details, a copy of which can be found in the file COPYING  *
  18  * included with this package.                                     *
  19  *******************************************************************/
  20
  21 #include <asm/byteorder.h>
  22
  23 struct lpfc_hba;
  24 #define LPFC_FCP_CDB_LEN 16
  25
  26 #define list_remove_head(list, entry, type, member)             \
  27         do {                                                    \
  28         entry = NULL;                                           \
  29         if (!list_empty(list)) {                                \
  30                 entry = list_entry((list)->next, type, member); \
  31                 list_del_init(&entry->member);                  \
  32         }                                                       \
  33         } while(0)
  34
  35 #define list_get_first(list, type, member)                      \
  36         (list_empty(list)) ? NULL :                             \
  37         list_entry((list)->next, type, member)
  38
  39 /* per-port data that is allocated in the FC transport for us */
  40 struct lpfc_rport_data {
  41         struct lpfc_nodelist *pnode;    /* Pointer to the node structure. */
  42 };
  43
  44 struct lpfc_device_id {
  45         struct lpfc_name vport_wwpn;
  46         struct lpfc_name target_wwpn;
  47         uint64_t lun;
  48 };
  49
  50 struct lpfc_device_data {
  51         struct list_head listentry;
  52         struct lpfc_rport_data *rport_data;
  53         struct lpfc_device_id device_id;
  54         bool oas_enabled;
  55         bool available;
  56 };
  57
  58 struct fcp_rsp {
  59         uint32_t rspRsvd1;      /* FC Word 0, byte 0:3 */
  60         uint32_t rspRsvd2;      /* FC Word 1, byte 0:3 */
  61
  62         uint8_t rspStatus0;     /* FCP_STATUS byte 0 (reserved) */
  63         uint8_t rspStatus1;     /* FCP_STATUS byte 1 (reserved) */
  64         uint8_t rspStatus2;     /* FCP_STATUS byte 2 field validity */
  65 #define RSP_LEN_VALID  0x01     /* bit 0 */
  66 #define SNS_LEN_VALID  0x02     /* bit 1 */
  67 #define RESID_OVER     0x04     /* bit 2 */
  68 #define RESID_UNDER    0x08     /* bit 3 */
  69         uint8_t rspStatus3;     /* FCP_STATUS byte 3 SCSI status byte */
  70
  71         uint32_t rspResId;      /* Residual xfer if residual count field set in
  72                                    fcpStatus2 */
  73         /* Received in Big Endian format */
  74         uint32_t rspSnsLen;     /* Length of sense data in fcpSnsInfo */
  75         /* Received in Big Endian format */
  76         uint32_t rspRspLen;     /* Length of FCP response data in fcpRspInfo */
  77         /* Received in Big Endian format */
  78
  79         uint8_t rspInfo0;       /* FCP_RSP_INFO byte 0 (reserved) */
  80         uint8_t rspInfo1;       /* FCP_RSP_INFO byte 1 (reserved) */
  81         uint8_t rspInfo2;       /* FCP_RSP_INFO byte 2 (reserved) */
  82         uint8_t rspInfo3;       /* FCP_RSP_INFO RSP_CODE byte 3 */
  83
  84 #define RSP_NO_FAILURE       0x00
  85 #define RSP_DATA_BURST_ERR   0x01
  86 #define RSP_CMD_FIELD_ERR    0x02
  87 #define RSP_RO_MISMATCH_ERR  0x03
  88 #define RSP_TM_NOT_SUPPORTED 0x04       /* Task mgmt function not supported */
  89 #define RSP_TM_NOT_COMPLETED 0x05       /* Task mgmt function not performed */
  90 #define RSP_TM_INVALID_LU    0x09       /* Task mgmt function to invalid LU */
  91
  92         uint32_t rspInfoRsvd;   /* FCP_RSP_INFO bytes 4-7 (reserved) */
  93
  94         uint8_t rspSnsInfo[128];
  95 #define SNS_ILLEGAL_REQ 0x05    /* sense key is byte 3 ([2]) */
  96 #define SNSCOD_BADCMD 0x20      /* sense code is byte 13 ([12]) */
  97 };
  98
  99 struct fcp_cmnd {
 100         struct scsi_lun  fcp_lun;
 101
 102         uint8_t fcpCntl0;       /* FCP_CNTL byte 0 (reserved) */
 103         uint8_t fcpCntl1;       /* FCP_CNTL byte 1 task codes */
 104 #define  SIMPLE_Q        0x00
 105 #define  HEAD_OF_Q       0x01
 106 #define  ORDERED_Q       0x02
 107 #define  ACA_Q           0x04
 108 #define  UNTAGGED        0x05
 109         uint8_t fcpCntl2;       /* FCP_CTL byte 2 task management codes */
 110 #define  FCP_ABORT_TASK_SET  0x02       /* Bit 1 */
 111 #define  FCP_CLEAR_TASK_SET  0x04       /* bit 2 */
 112 #define  FCP_BUS_RESET       0x08       /* bit 3 */
 113 #define  FCP_LUN_RESET       0x10       /* bit 4 */
 114 #define  FCP_TARGET_RESET    0x20       /* bit 5 */
 115 #define  FCP_CLEAR_ACA       0x40       /* bit 6 */
 116 #define  FCP_TERMINATE_TASK  0x80       /* bit 7 */
 117         uint8_t fcpCntl3;
 118 #define  WRITE_DATA      0x01   /* Bit 0 */
 119 #define  READ_DATA       0x02   /* Bit 1 */
 120
 121         uint8_t fcpCdb[LPFC_FCP_CDB_LEN]; /* SRB cdb field is copied here */
 122         uint32_t fcpDl;         /* Total transfer length */
 123
 124 };
 125
 126 struct lpfc_scsicmd_bkt {
 127         uint32_t cmd_count;
 128 };
 129
 130 struct lpfc_scsi_buf {
 131         struct list_head list;
 132         struct scsi_cmnd *pCmd;
 133         struct lpfc_rport_data *rdata;
 134
 135         uint32_t timeout;
 136
 137         uint16_t exch_busy;     /* SLI4 hba reported XB on complete WCQE */
 138         uint16_t status;        /* From IOCB Word 7- ulpStatus */
 139         uint32_t result;        /* From IOCB Word 4. */
 140
 141         uint32_t   seg_cnt;     /* Number of scatter-gather segments returned by
 142                                  * dma_map_sg.  The driver needs this for calls
 143                                  * to dma_unmap_sg. */
 144         uint32_t prot_seg_cnt;  /* seg_cnt's counterpart for protection data */
 145
 146         dma_addr_t nonsg_phys;  /* Non scatter-gather physical address. */
 147
 148         /*
 149          * data and dma_handle are the kernel virtual and bus address of the
 150          * dma-able buffer containing the fcp_cmd, fcp_rsp and a scatter
 151          * gather bde list that supports the sg_tablesize value.
 152          */
 153         void *data;
 154         dma_addr_t dma_handle;
 155
 156         struct fcp_cmnd *fcp_cmnd;
 157         struct fcp_rsp *fcp_rsp;
 158         struct ulp_bde64 *fcp_bpl;
 159
 160         dma_addr_t dma_phys_bpl;
 161
 162         /* cur_iocbq has phys of the dma-able buffer.
 163          * Iotag is in here
 164          */
 165         struct lpfc_iocbq cur_iocbq;
 166         wait_queue_head_t *waitq;
 167         unsigned long start_time;
 168
 169 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 170         /* Used to restore any changes to protection data for error injection */
 171         void *prot_data_segment;
 172         uint32_t prot_data;
 173         uint32_t prot_data_type;
 174 #define LPFC_INJERR_REFTAG      1
 175 #define LPFC_INJERR_APPTAG      2
 176 #define LPFC_INJERR_GUARD       3
 177 #endif
 178 };
 179
 180 #define LPFC_SCSI_DMA_EXT_SIZE 264
 181 #define LPFC_BPL_SIZE          1024
 182 #define MDAC_DIRECT_CMD                  0x22
 183
 184 #define FIND_FIRST_OAS_LUN               0
 185 #define NO_MORE_OAS_LUN                 -1
 186 #define NOT_OAS_ENABLED_LUN             NO_MORE_OAS_LUN
 187
 188 int lpfc_sli4_scmd_to_wqidx_distr(struct lpfc_hba *phba,
 189                                   struct lpfc_scsi_buf *lpfc_cmd);