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   1 /*
   2  * SCSI target kernel/user interface
   3  *
   4  * Copyright (C) 2005 FUJITA Tomonori <tomof@acm.org>
   5  * Copyright (C) 2005 Mike Christie <michaelc@cs.wisc.edu>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  */
  22 #ifndef __SCSI_TARGET_IF_H
  23 #define __SCSI_TARGET_IF_H
  24
  25 /* user -> kernel */
  26 #define TGT_UEVENT_CMD_RSP              0x0001
  27 #define TGT_UEVENT_IT_NEXUS_RSP         0x0002
  28 #define TGT_UEVENT_TSK_MGMT_RSP         0x0003
  29
  30 /* kernel -> user */
  31 #define TGT_KEVENT_CMD_REQ              0x1001
  32 #define TGT_KEVENT_CMD_DONE             0x1002
  33 #define TGT_KEVENT_IT_NEXUS_REQ         0x1003
  34 #define TGT_KEVENT_TSK_MGMT_REQ         0x1004
  35
  36 struct tgt_event_hdr {
  37         uint16_t version;
  38         uint16_t status;
  39         uint16_t type;
  40         uint16_t len;
  41 } __attribute__ ((aligned (sizeof(uint64_t))));
  42
  43 struct tgt_event {
  44         struct tgt_event_hdr hdr;
  45
  46         union {
  47                 /* user-> kernel */
  48                 struct {
  49                         int host_no;
  50                         int result;
  51                         aligned_u64 itn_id;
  52                         aligned_u64 tag;
  53                         aligned_u64 uaddr;
  54                         aligned_u64 sense_uaddr;
  55                         uint32_t len;
  56                         uint32_t sense_len;
  57                         uint8_t rw;
  58                 } cmd_rsp;
  59                 struct {
  60                         int host_no;
  61                         int result;
  62                         aligned_u64 itn_id;
  63                         aligned_u64 mid;
  64                 } tsk_mgmt_rsp;
  65                 struct {
  66                         __s32 host_no;
  67                         __s32 result;
  68                         aligned_u64 itn_id;
  69                         __u32 function;
  70                 } it_nexus_rsp;
  71
  72                 /* kernel -> user */
  73                 struct {
  74                         int host_no;
  75                         uint32_t data_len;
  76                         aligned_u64 itn_id;
  77                         uint8_t scb[16];
  78                         uint8_t lun[8];
  79                         int attribute;
  80                         aligned_u64 tag;
  81                 } cmd_req;
  82                 struct {
  83                         int host_no;
  84                         int result;
  85                         aligned_u64 itn_id;
  86                         aligned_u64 tag;
  87                 } cmd_done;
  88                 struct {
  89                         int host_no;
  90                         int function;
  91                         aligned_u64 itn_id;
  92                         aligned_u64 tag;
  93                         uint8_t lun[8];
  94                         aligned_u64 mid;
  95                 } tsk_mgmt_req;
  96                 struct {
  97                         __s32 host_no;
  98                         __u32 function;
  99                         aligned_u64 itn_id;
 100                         __u32 max_cmds;
 101                         __u8 initiator_id[16];
 102                 } it_nexus_req;
 103         } p;
 104 } __attribute__ ((aligned (sizeof(uint64_t))));
 105
 106 #define TGT_RING_SIZE (1UL << 16)
 107
 108 #endif