1/* SPDX-License-Identifier: GPL-2.0-or-later WITH Linux-syscall-note */
 2/*
 3 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
 4 */
 5
 6/*
 7 * Oracle DAX driver API definitions
 8 */
 9
10#ifndef _ORADAX_H
11#define	_ORADAX_H
12
13#include <linux/types.h>
14
15#define	CCB_KILL 0
16#define	CCB_INFO 1
17#define	CCB_DEQUEUE 2
18
19struct dax_command {
20	__u16 command;		/* CCB_KILL/INFO/DEQUEUE */
21	__u16 ca_offset;	/* offset into mmapped completion area */
22};
23
24struct ccb_kill_result {
25	__u16 action;		/* action taken to kill ccb */
26};
27
28struct ccb_info_result {
29	__u16 state;		/* state of enqueued ccb */
30	__u16 inst_num;		/* dax instance number of enqueued ccb */
31	__u16 q_num;		/* queue number of enqueued ccb */
32	__u16 q_pos;		/* ccb position in queue */
33};
34
35struct ccb_exec_result {
36	__u64	status_data;	/* additional status data (e.g. bad VA) */
37	__u32	status;		/* one of DAX_SUBMIT_* */
38};
39
40union ccb_result {
41	struct ccb_exec_result exec;
42	struct ccb_info_result info;
43	struct ccb_kill_result kill;
44};
45
46#define	DAX_MMAP_LEN		(16 * 1024)
47#define	DAX_MAX_CCBS		15
48#define	DAX_CCB_BUF_MAXLEN	(DAX_MAX_CCBS * 64)
49#define	DAX_NAME		"oradax"
50
51/* CCB_EXEC status */
52#define	DAX_SUBMIT_OK			0
53#define	DAX_SUBMIT_ERR_RETRY		1
54#define	DAX_SUBMIT_ERR_WOULDBLOCK	2
55#define	DAX_SUBMIT_ERR_BUSY		3
56#define	DAX_SUBMIT_ERR_THR_INIT		4
57#define	DAX_SUBMIT_ERR_ARG_INVAL	5
58#define	DAX_SUBMIT_ERR_CCB_INVAL	6
59#define	DAX_SUBMIT_ERR_NO_CA_AVAIL	7
60#define	DAX_SUBMIT_ERR_CCB_ARR_MMU_MISS	8
61#define	DAX_SUBMIT_ERR_NOMAP		9
62#define	DAX_SUBMIT_ERR_NOACCESS		10
63#define	DAX_SUBMIT_ERR_TOOMANY		11
64#define	DAX_SUBMIT_ERR_UNAVAIL		12
65#define	DAX_SUBMIT_ERR_INTERNAL		13
66
67/* CCB_INFO states - must match HV_CCB_STATE_* definitions */
68#define	DAX_CCB_COMPLETED	0
69#define	DAX_CCB_ENQUEUED	1
70#define	DAX_CCB_INPROGRESS	2
71#define	DAX_CCB_NOTFOUND	3
72
73/* CCB_KILL actions - must match HV_CCB_KILL_* definitions */
74#define	DAX_KILL_COMPLETED	0
75#define	DAX_KILL_DEQUEUED	1
76#define	DAX_KILL_KILLED		2
77#define	DAX_KILL_NOTFOUND	3
78
79#endif /* _ORADAX_H */

 1/* SPDX-License-Identifier: GPL-2.0-or-later WITH Linux-syscall-note */
 2/*
 3 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
 4 */
 5
 6/*
 7 * Oracle DAX driver API definitions
 8 */
 9
10#ifndef _ORADAX_H
11#define	_ORADAX_H
12
13#include <linux/types.h>
14
15#define	CCB_KILL 0
16#define	CCB_INFO 1
17#define	CCB_DEQUEUE 2
18
19struct dax_command {
20	__u16 command;		/* CCB_KILL/INFO/DEQUEUE */
21	__u16 ca_offset;	/* offset into mmapped completion area */
22};
23
24struct ccb_kill_result {
25	__u16 action;		/* action taken to kill ccb */
26};
27
28struct ccb_info_result {
29	__u16 state;		/* state of enqueued ccb */
30	__u16 inst_num;		/* dax instance number of enqueued ccb */
31	__u16 q_num;		/* queue number of enqueued ccb */
32	__u16 q_pos;		/* ccb position in queue */
33};
34
35struct ccb_exec_result {
36	__u64	status_data;	/* additional status data (e.g. bad VA) */
37	__u32	status;		/* one of DAX_SUBMIT_* */
38};
39
40union ccb_result {
41	struct ccb_exec_result exec;
42	struct ccb_info_result info;
43	struct ccb_kill_result kill;
44};
45
46#define	DAX_MMAP_LEN		(16 * 1024)
47#define	DAX_MAX_CCBS		15
48#define	DAX_CCB_BUF_MAXLEN	(DAX_MAX_CCBS * 64)
49#define	DAX_NAME		"oradax"
50
51/* CCB_EXEC status */
52#define	DAX_SUBMIT_OK			0
53#define	DAX_SUBMIT_ERR_RETRY		1
54#define	DAX_SUBMIT_ERR_WOULDBLOCK	2
55#define	DAX_SUBMIT_ERR_BUSY		3
56#define	DAX_SUBMIT_ERR_THR_INIT		4
57#define	DAX_SUBMIT_ERR_ARG_INVAL	5
58#define	DAX_SUBMIT_ERR_CCB_INVAL	6
59#define	DAX_SUBMIT_ERR_NO_CA_AVAIL	7
60#define	DAX_SUBMIT_ERR_CCB_ARR_MMU_MISS	8
61#define	DAX_SUBMIT_ERR_NOMAP		9
62#define	DAX_SUBMIT_ERR_NOACCESS		10
63#define	DAX_SUBMIT_ERR_TOOMANY		11
64#define	DAX_SUBMIT_ERR_UNAVAIL		12
65#define	DAX_SUBMIT_ERR_INTERNAL		13
66
67/* CCB_INFO states - must match HV_CCB_STATE_* definitions */
68#define	DAX_CCB_COMPLETED	0
69#define	DAX_CCB_ENQUEUED	1
70#define	DAX_CCB_INPROGRESS	2
71#define	DAX_CCB_NOTFOUND	3
72
73/* CCB_KILL actions - must match HV_CCB_KILL_* definitions */
74#define	DAX_KILL_COMPLETED	0
75#define	DAX_KILL_DEQUEUED	1
76#define	DAX_KILL_KILLED		2
77#define	DAX_KILL_NOTFOUND	3
78
79#endif /* _ORADAX_H */