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) 2004-2006 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 fcp_rsp {
  45         uint32_t rspRsvd1;      /* FC Word 0, byte 0:3 */
  46         uint32_t rspRsvd2;      /* FC Word 1, byte 0:3 */
  47
  48         uint8_t rspStatus0;     /* FCP_STATUS byte 0 (reserved) */
  49         uint8_t rspStatus1;     /* FCP_STATUS byte 1 (reserved) */
  50         uint8_t rspStatus2;     /* FCP_STATUS byte 2 field validity */
  51 #define RSP_LEN_VALID  0x01     /* bit 0 */
  52 #define SNS_LEN_VALID  0x02     /* bit 1 */
  53 #define RESID_OVER     0x04     /* bit 2 */
  54 #define RESID_UNDER    0x08     /* bit 3 */
  55         uint8_t rspStatus3;     /* FCP_STATUS byte 3 SCSI status byte */
  56
  57         uint32_t rspResId;      /* Residual xfer if residual count field set in
  58                                    fcpStatus2 */
  59         /* Received in Big Endian format */
  60         uint32_t rspSnsLen;     /* Length of sense data in fcpSnsInfo */
  61         /* Received in Big Endian format */
  62         uint32_t rspRspLen;     /* Length of FCP response data in fcpRspInfo */
  63         /* Received in Big Endian format */
  64
  65         uint8_t rspInfo0;       /* FCP_RSP_INFO byte 0 (reserved) */
  66         uint8_t rspInfo1;       /* FCP_RSP_INFO byte 1 (reserved) */
  67         uint8_t rspInfo2;       /* FCP_RSP_INFO byte 2 (reserved) */
  68         uint8_t rspInfo3;       /* FCP_RSP_INFO RSP_CODE byte 3 */
  69
  70 #define RSP_NO_FAILURE       0x00
  71 #define RSP_DATA_BURST_ERR   0x01
  72 #define RSP_CMD_FIELD_ERR    0x02
  73 #define RSP_RO_MISMATCH_ERR  0x03
  74 #define RSP_TM_NOT_SUPPORTED 0x04       /* Task mgmt function not supported */
  75 #define RSP_TM_NOT_COMPLETED 0x05       /* Task mgmt function not performed */
  76
  77         uint32_t rspInfoRsvd;   /* FCP_RSP_INFO bytes 4-7 (reserved) */
  78
  79         uint8_t rspSnsInfo[128];
  80 #define SNS_ILLEGAL_REQ 0x05    /* sense key is byte 3 ([2]) */
  81 #define SNSCOD_BADCMD 0x20      /* sense code is byte 13 ([12]) */
  82 };
  83
  84 struct fcp_cmnd {
  85         struct scsi_lun  fcp_lun;
  86
  87         uint8_t fcpCntl0;       /* FCP_CNTL byte 0 (reserved) */
  88         uint8_t fcpCntl1;       /* FCP_CNTL byte 1 task codes */
  89 #define  SIMPLE_Q        0x00
  90 #define  HEAD_OF_Q       0x01
  91 #define  ORDERED_Q       0x02
  92 #define  ACA_Q           0x04
  93 #define  UNTAGGED        0x05
  94         uint8_t fcpCntl2;       /* FCP_CTL byte 2 task management codes */
  95 #define  FCP_ABORT_TASK_SET  0x02       /* Bit 1 */
  96 #define  FCP_CLEAR_TASK_SET  0x04       /* bit 2 */
  97 #define  FCP_BUS_RESET       0x08       /* bit 3 */
  98 #define  FCP_LUN_RESET       0x10       /* bit 4 */
  99 #define  FCP_TARGET_RESET    0x20       /* bit 5 */
 100 #define  FCP_CLEAR_ACA       0x40       /* bit 6 */
 101 #define  FCP_TERMINATE_TASK  0x80       /* bit 7 */
 102         uint8_t fcpCntl3;
 103 #define  WRITE_DATA      0x01   /* Bit 0 */
 104 #define  READ_DATA       0x02   /* Bit 1 */
 105
 106         uint8_t fcpCdb[LPFC_FCP_CDB_LEN]; /* SRB cdb field is copied here */
 107         uint32_t fcpDl;         /* Total transfer length */
 108
 109 };
 110
 111 struct lpfc_scsicmd_bkt {
 112         uint32_t cmd_count;
 113 };
 114
 115 struct lpfc_scsi_buf {
 116         struct list_head list;
 117         struct scsi_cmnd *pCmd;
 118         struct lpfc_rport_data *rdata;
 119
 120         uint32_t timeout;
 121
 122         uint16_t exch_busy;     /* SLI4 hba reported XB on complete WCQE */
 123         uint16_t status;        /* From IOCB Word 7- ulpStatus */
 124         uint32_t result;        /* From IOCB Word 4. */
 125
 126         uint32_t   seg_cnt;     /* Number of scatter-gather segments returned by
 127                                  * dma_map_sg.  The driver needs this for calls
 128                                  * to dma_unmap_sg. */
 129         uint32_t prot_seg_cnt;  /* seg_cnt's counterpart for protection data */
 130
 131         dma_addr_t nonsg_phys;  /* Non scatter-gather physical address. */
 132
 133         /*
 134          * data and dma_handle are the kernel virtual and bus address of the
 135          * dma-able buffer containing the fcp_cmd, fcp_rsp and a scatter
 136          * gather bde list that supports the sg_tablesize value.
 137          */
 138         void *data;
 139         dma_addr_t dma_handle;
 140
 141         struct fcp_cmnd *fcp_cmnd;
 142         struct fcp_rsp *fcp_rsp;
 143         struct ulp_bde64 *fcp_bpl;
 144
 145         dma_addr_t dma_phys_bpl;
 146
 147         /* cur_iocbq has phys of the dma-able buffer.
 148          * Iotag is in here
 149          */
 150         struct lpfc_iocbq cur_iocbq;
 151         wait_queue_head_t *waitq;
 152         unsigned long start_time;
 153 };
 154
 155 #define LPFC_SCSI_DMA_EXT_SIZE 264
 156 #define LPFC_BPL_SIZE          1024
 157 #define LPFC_RETRY_PAUSE       300
 158 #define MDAC_DIRECT_CMD                  0x22