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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/include/scsi/scsi_tgt_if.h
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/*

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 * SCSI target kernel/user interface

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 *

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 * Copyright (C) 2005 FUJITA Tomonori <[email protected]>

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 * Copyright (C) 2005 Mike Christie <[email protected]>

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 *

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 * This program is free software; you can redistribute it and/or

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 * modify it under the terms of the GNU General Public License as

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 * published by the Free Software Foundation; either version 2 of the

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 * License, or (at your option) any later version.

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 *

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 * This program is distributed in the hope that it will be useful, but

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 * WITHOUT ANY WARRANTY; without even the implied warranty of

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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

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 * General Public License for more details.

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 *

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 * You should have received a copy of the GNU General Public License

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 * along with this program; if not, write to the Free Software

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 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA

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 * 02110-1301 USA

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 */

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#ifndef __SCSI_TARGET_IF_H

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#define __SCSI_TARGET_IF_H

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/* user -> kernel */

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#define	TGT_UEVENT_CMD_RSP		0x0001

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#define	TGT_UEVENT_IT_NEXUS_RSP		0x0002

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#define	TGT_UEVENT_TSK_MGMT_RSP		0x0003

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/* kernel -> user */

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#define	TGT_KEVENT_CMD_REQ		0x1001

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#define	TGT_KEVENT_CMD_DONE		0x1002

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#define	TGT_KEVENT_IT_NEXUS_REQ		0x1003

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#define	TGT_KEVENT_TSK_MGMT_REQ		0x1004

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struct tgt_event_hdr {

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	uint16_t version;

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	uint16_t status;

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	uint16_t type;

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	uint16_t len;

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} __attribute__ ((aligned (sizeof(uint64_t))));

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struct tgt_event {

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	struct tgt_event_hdr hdr;

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	union {

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		/* user-> kernel */

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		struct {

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			int host_no;

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			int result;

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			aligned_u64 itn_id;

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			aligned_u64 tag;

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			aligned_u64 uaddr;

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			aligned_u64 sense_uaddr;

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			uint32_t len;

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			uint32_t sense_len;

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			uint8_t rw;

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		} cmd_rsp;

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		struct {

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			int host_no;

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			int result;

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			aligned_u64 itn_id;

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			aligned_u64 mid;

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		} tsk_mgmt_rsp;

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		struct {

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			__s32 host_no;

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			__s32 result;

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			aligned_u64 itn_id;

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			__u32 function;

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		} it_nexus_rsp;

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		/* kernel -> user */

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		struct {

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			int host_no;

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			uint32_t data_len;

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			aligned_u64 itn_id;

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			uint8_t scb[16];

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			uint8_t lun[8];

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			int attribute;

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			aligned_u64 tag;

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		} cmd_req;

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		struct {

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			int host_no;

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			int result;

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			aligned_u64 itn_id;

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			aligned_u64 tag;

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		} cmd_done;

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		struct {

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			int host_no;

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			int function;

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			aligned_u64 itn_id;

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			aligned_u64 tag;

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			uint8_t lun[8];

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			aligned_u64 mid;

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		} tsk_mgmt_req;

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		struct {

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			__s32 host_no;

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			__u32 function;

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			aligned_u64 itn_id;

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			__u32 max_cmds;

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			__u8 initiator_id[16];

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		} it_nexus_req;

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	} p;

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} __attribute__ ((aligned (sizeof(uint64_t))));

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#define TGT_RING_SIZE (1UL << 16)

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#endif

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