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 36struct 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 43struct 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 109