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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_TSK_MGMT_RSP 0x0002
  28
  29 /* kernel -> user */
  30 #define TGT_KEVENT_CMD_REQ      0x1001
  31 #define TGT_KEVENT_CMD_DONE     0x1002
  32 #define TGT_KEVENT_TSK_MGMT_REQ 0x1003
  33
  34 struct tgt_event_hdr {
  35         uint16_t version;
  36         uint16_t status;
  37         uint16_t type;
  38         uint16_t len;
  39 } __attribute__ ((aligned (sizeof(uint64_t))));
  40
  41 struct tgt_event {
  42         struct tgt_event_hdr hdr;
  43
  44         union {
  45                 /* user-> kernel */
  46                 struct {
  47                         int host_no;
  48                         int result;
  49                         aligned_u64 tag;
  50                         aligned_u64 uaddr;
  51                         aligned_u64 sense_uaddr;
  52                         uint32_t len;
  53                         uint32_t sense_len;
  54                         uint8_t rw;
  55                 } cmd_rsp;
  56                 struct {
  57                         int host_no;
  58                         aligned_u64 mid;
  59                         int result;
  60                 } tsk_mgmt_rsp;
  61
  62
  63                 /* kernel -> user */
  64                 struct {
  65                         int host_no;
  66                         uint32_t data_len;
  67                         uint8_t scb[16];
  68                         uint8_t lun[8];
  69                         int attribute;
  70                         aligned_u64 tag;
  71                 } cmd_req;
  72                 struct {
  73                         int host_no;
  74                         aligned_u64 tag;
  75                         int result;
  76                 } cmd_done;
  77                 struct {
  78                         int host_no;
  79                         int function;
  80                         aligned_u64 tag;
  81                         uint8_t lun[8];
  82                         aligned_u64 mid;
  83                 } tsk_mgmt_req;
  84         } p;
  85 } __attribute__ ((aligned (sizeof(uint64_t))));
  86
  87 #define TGT_RING_SIZE (1UL << 16)
  88
  89 #endif