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) 2004-2005 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
  25 #define list_remove_head(list, entry, type, member)             \
  26         if (!list_empty(list)) {                                \
  27                 entry = list_entry((list)->next, type, member); \
  28                 list_del_init(&entry->member);                  \
  29         }
  30
  31 #define list_get_first(list, type, member)                      \
  32         (list_empty(list)) ? NULL :                             \
  33         list_entry((list)->next, type, member)
  34
  35 /* per-port data that is allocated in the FC transport for us */
  36 struct lpfc_rport_data {
  37         struct lpfc_nodelist *pnode;    /* Pointer to the node structure. */
  38 };
  39
  40 struct fcp_rsp {
  41         uint32_t rspRsvd1;      /* FC Word 0, byte 0:3 */
  42         uint32_t rspRsvd2;      /* FC Word 1, byte 0:3 */
  43
  44         uint8_t rspStatus0;     /* FCP_STATUS byte 0 (reserved) */
  45         uint8_t rspStatus1;     /* FCP_STATUS byte 1 (reserved) */
  46         uint8_t rspStatus2;     /* FCP_STATUS byte 2 field validity */
  47 #define RSP_LEN_VALID  0x01     /* bit 0 */
  48 #define SNS_LEN_VALID  0x02     /* bit 1 */
  49 #define RESID_OVER     0x04     /* bit 2 */
  50 #define RESID_UNDER    0x08     /* bit 3 */
  51         uint8_t rspStatus3;     /* FCP_STATUS byte 3 SCSI status byte */
  52
  53         uint32_t rspResId;      /* Residual xfer if residual count field set in
  54                                    fcpStatus2 */
  55         /* Received in Big Endian format */
  56         uint32_t rspSnsLen;     /* Length of sense data in fcpSnsInfo */
  57         /* Received in Big Endian format */
  58         uint32_t rspRspLen;     /* Length of FCP response data in fcpRspInfo */
  59         /* Received in Big Endian format */
  60
  61         uint8_t rspInfo0;       /* FCP_RSP_INFO byte 0 (reserved) */
  62         uint8_t rspInfo1;       /* FCP_RSP_INFO byte 1 (reserved) */
  63         uint8_t rspInfo2;       /* FCP_RSP_INFO byte 2 (reserved) */
  64         uint8_t rspInfo3;       /* FCP_RSP_INFO RSP_CODE byte 3 */
  65
  66 #define RSP_NO_FAILURE       0x00
  67 #define RSP_DATA_BURST_ERR   0x01
  68 #define RSP_CMD_FIELD_ERR    0x02
  69 #define RSP_RO_MISMATCH_ERR  0x03
  70 #define RSP_TM_NOT_SUPPORTED 0x04       /* Task mgmt function not supported */
  71 #define RSP_TM_NOT_COMPLETED 0x05       /* Task mgmt function not performed */
  72
  73         uint32_t rspInfoRsvd;   /* FCP_RSP_INFO bytes 4-7 (reserved) */
  74
  75         uint8_t rspSnsInfo[128];
  76 #define SNS_ILLEGAL_REQ 0x05    /* sense key is byte 3 ([2]) */
  77 #define SNSCOD_BADCMD 0x20      /* sense code is byte 13 ([12]) */
  78 };
  79
  80 struct fcp_cmnd {
  81         struct scsi_lun  fcp_lun;
  82
  83         uint8_t fcpCntl0;       /* FCP_CNTL byte 0 (reserved) */
  84         uint8_t fcpCntl1;       /* FCP_CNTL byte 1 task codes */
  85 #define  SIMPLE_Q        0x00
  86 #define  HEAD_OF_Q       0x01
  87 #define  ORDERED_Q       0x02
  88 #define  ACA_Q           0x04
  89 #define  UNTAGGED        0x05
  90         uint8_t fcpCntl2;       /* FCP_CTL byte 2 task management codes */
  91 #define  FCP_ABORT_TASK_SET  0x02       /* Bit 1 */
  92 #define  FCP_CLEAR_TASK_SET  0x04       /* bit 2 */
  93 #define  FCP_BUS_RESET       0x08       /* bit 3 */
  94 #define  FCP_LUN_RESET       0x10       /* bit 4 */
  95 #define  FCP_TARGET_RESET    0x20       /* bit 5 */
  96 #define  FCP_CLEAR_ACA       0x40       /* bit 6 */
  97 #define  FCP_TERMINATE_TASK  0x80       /* bit 7 */
  98         uint8_t fcpCntl3;
  99 #define  WRITE_DATA      0x01   /* Bit 0 */
 100 #define  READ_DATA       0x02   /* Bit 1 */
 101
 102         uint8_t fcpCdb[16];     /* SRB cdb field is copied here */
 103         uint32_t fcpDl;         /* Total transfer length */
 104
 105 };
 106
 107 struct lpfc_scsi_buf {
 108         struct list_head list;
 109         struct scsi_cmnd *pCmd;
 110         struct lpfc_hba *scsi_hba;
 111         struct lpfc_rport_data *rdata;
 112
 113         uint32_t timeout;
 114
 115         uint16_t status;        /* From IOCB Word 7- ulpStatus */
 116         uint32_t result;        /* From IOCB Word 4. */
 117
 118         uint32_t   seg_cnt;     /* Number of scatter-gather segments returned by
 119                                  * dma_map_sg.  The driver needs this for calls
 120                                  * to dma_unmap_sg. */
 121         dma_addr_t nonsg_phys;  /* Non scatter-gather physical address. */
 122
 123         /*
 124          * data and dma_handle are the kernel virutal and bus address of the
 125          * dma-able buffer containing the fcp_cmd, fcp_rsp and a scatter
 126          * gather bde list that supports the sg_tablesize value.
 127          */
 128         void *data;
 129         dma_addr_t dma_handle;
 130
 131         struct fcp_cmnd *fcp_cmnd;
 132         struct fcp_rsp *fcp_rsp;
 133         struct ulp_bde64 *fcp_bpl;
 134
 135         /* cur_iocbq has phys of the dma-able buffer.
 136          * Iotag is in here
 137          */
 138         struct lpfc_iocbq cur_iocbq;
 139 };
 140
 141 #define LPFC_SCSI_DMA_EXT_SIZE 264
 142 #define LPFC_BPL_SIZE          1024
 143
 144 #define MDAC_DIRECT_CMD                  0x22