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