drivers/scsi/lpfc/lpfc_scsi.h

   1 /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Enterprise Fibre Channel Host Bus Adapters.                     *
   4  * Refer to the README file included with this package for         *
   5  * driver version and adapter support.                             *
   6  * Copyright (C) 2004 Emulex Corporation.                          *
   7  * www.emulex.com                                                  *
   8  *                                                                 *
   9  * This program is free software; you can redistribute it and/or   *
  10  * modify it under the terms of the GNU General Public License     *
  11  * as published by the Free Software Foundation; either version 2  *
  12  * of the License, or (at your option) any later version.          *
  13  *                                                                 *
  14  * This program is distributed in the hope that it will be useful, *
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of  *
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the   *
  17  * GNU General Public License for more details, a copy of which    *
  18  * can be found in the file COPYING included with this package.    *
  19  *******************************************************************/
  20
  21 /*
  22  * $Id: lpfc_scsi.h 1.83 2005/04/07 08:47:43EDT sf_support Exp  $
  23  */
  24
  25 struct lpfc_hba;
  26
  27 #define list_remove_head(list, entry, type, member)             \
  28         if (!list_empty(list)) {                                \
  29                 entry = list_entry((list)->next, type, member); \
  30                 list_del_init(&entry->member);                  \
  31         }
  32
  33 #define list_get_first(list, type, member)                      \
  34         (list_empty(list)) ? NULL :                             \
  35         list_entry((list)->next, type, member)
  36
  37 /* per-port data that is allocated in the FC transport for us */
  38 struct lpfc_rport_data {
  39         struct lpfc_nodelist *pnode;    /* Pointer to the node structure. */
  40 };
  41
  42 struct fcp_rsp {
  43         uint32_t rspRsvd1;      /* FC Word 0, byte 0:3 */
  44         uint32_t rspRsvd2;      /* FC Word 1, byte 0:3 */
  45
  46         uint8_t rspStatus0;     /* FCP_STATUS byte 0 (reserved) */
  47         uint8_t rspStatus1;     /* FCP_STATUS byte 1 (reserved) */
  48         uint8_t rspStatus2;     /* FCP_STATUS byte 2 field validity */
  49 #define RSP_LEN_VALID  0x01     /* bit 0 */
  50 #define SNS_LEN_VALID  0x02     /* bit 1 */
  51 #define RESID_OVER     0x04     /* bit 2 */
  52 #define RESID_UNDER    0x08     /* bit 3 */
  53         uint8_t rspStatus3;     /* FCP_STATUS byte 3 SCSI status byte */
  54
  55         uint32_t rspResId;      /* Residual xfer if residual count field set in
  56                                    fcpStatus2 */
  57         /* Received in Big Endian format */
  58         uint32_t rspSnsLen;     /* Length of sense data in fcpSnsInfo */
  59         /* Received in Big Endian format */
  60         uint32_t rspRspLen;     /* Length of FCP response data in fcpRspInfo */
  61         /* Received in Big Endian format */
  62
  63         uint8_t rspInfo0;       /* FCP_RSP_INFO byte 0 (reserved) */
  64         uint8_t rspInfo1;       /* FCP_RSP_INFO byte 1 (reserved) */
  65         uint8_t rspInfo2;       /* FCP_RSP_INFO byte 2 (reserved) */
  66         uint8_t rspInfo3;       /* FCP_RSP_INFO RSP_CODE byte 3 */
  67
  68 #define RSP_NO_FAILURE       0x00
  69 #define RSP_DATA_BURST_ERR   0x01
  70 #define RSP_CMD_FIELD_ERR    0x02
  71 #define RSP_RO_MISMATCH_ERR  0x03
  72 #define RSP_TM_NOT_SUPPORTED 0x04       /* Task mgmt function not supported */
  73 #define RSP_TM_NOT_COMPLETED 0x05       /* Task mgmt function not performed */
  74
  75         uint32_t rspInfoRsvd;   /* FCP_RSP_INFO bytes 4-7 (reserved) */
  76
  77         uint8_t rspSnsInfo[128];
  78 #define SNS_ILLEGAL_REQ 0x05    /* sense key is byte 3 ([2]) */
  79 #define SNSCOD_BADCMD 0x20      /* sense code is byte 13 ([12]) */
  80 };
  81
  82 struct fcp_cmnd {
  83         uint32_t fcpLunMsl;     /* most  significant lun word (32 bits) */
  84         uint32_t fcpLunLsl;     /* least significant lun word (32 bits) */
  85         /* # of bits to shift lun id to end up in right
  86          * payload word, little endian = 8, big = 16.
  87          */
  88 #if __BIG_ENDIAN
  89 #define FC_LUN_SHIFT         16
  90 #define FC_ADDR_MODE_SHIFT   24
  91 #else   /*  __LITTLE_ENDIAN */
  92 #define FC_LUN_SHIFT         8
  93 #define FC_ADDR_MODE_SHIFT   0
  94 #endif
  95
  96         uint8_t fcpCntl0;       /* FCP_CNTL byte 0 (reserved) */
  97         uint8_t fcpCntl1;       /* FCP_CNTL byte 1 task codes */
  98 #define  SIMPLE_Q        0x00
  99 #define  HEAD_OF_Q       0x01
 100 #define  ORDERED_Q       0x02
 101 #define  ACA_Q           0x04
 102 #define  UNTAGGED        0x05
 103         uint8_t fcpCntl2;       /* FCP_CTL byte 2 task management codes */
 104 #define  FCP_ABORT_TASK_SET  0x02       /* Bit 1 */
 105 #define  FCP_CLEAR_TASK_SET  0x04       /* bit 2 */
 106 #define  FCP_BUS_RESET       0x08       /* bit 3 */
 107 #define  FCP_LUN_RESET       0x10       /* bit 4 */
 108 #define  FCP_TARGET_RESET    0x20       /* bit 5 */
 109 #define  FCP_CLEAR_ACA       0x40       /* bit 6 */
 110 #define  FCP_TERMINATE_TASK  0x80       /* bit 7 */
 111         uint8_t fcpCntl3;
 112 #define  WRITE_DATA      0x01   /* Bit 0 */
 113 #define  READ_DATA       0x02   /* Bit 1 */
 114
 115         uint8_t fcpCdb[16];     /* SRB cdb field is copied here */
 116         uint32_t fcpDl;         /* Total transfer length */
 117
 118 };
 119
 120 struct lpfc_scsi_buf {
 121         struct list_head list;
 122         struct scsi_cmnd *pCmd;
 123         struct lpfc_hba *scsi_hba;
 124         struct lpfc_rport_data *rdata;
 125
 126         uint32_t timeout;
 127
 128         uint16_t status;        /* From IOCB Word 7- ulpStatus */
 129         uint32_t result;        /* From IOCB Word 4. */
 130
 131         uint32_t   seg_cnt;     /* Number of scatter-gather segments returned by
 132                                  * dma_map_sg.  The driver needs this for calls
 133                                  * to dma_unmap_sg. */
 134         dma_addr_t nonsg_phys;  /* Non scatter-gather physical address. */
 135
 136         /*
 137          * data and dma_handle are the kernel virutal and bus address of the
 138          * dma-able buffer containing the fcp_cmd, fcp_rsp and a scatter
 139          * gather bde list that supports the sg_tablesize value.
 140          */
 141         void *data;
 142         dma_addr_t dma_handle;
 143
 144         struct fcp_cmnd *fcp_cmnd;
 145         struct fcp_rsp *fcp_rsp;
 146         struct ulp_bde64 *fcp_bpl;
 147
 148         /* cur_iocbq has phys of the dma-able buffer.
 149          * Iotag is in here
 150          */
 151         struct lpfc_iocbq cur_iocbq;
 152 };
 153
 154 #define LPFC_SCSI_DMA_EXT_SIZE 264
 155 #define LPFC_BPL_SIZE          1024
 156
 157 #define MDAC_DIRECT_CMD                  0x22