aboutsummaryrefslogtreecommitdiffstats
path: root/include/linux/virtio_blk.h
diff options
context:
space:
mode:
authorDavid Howells <dhowells@redhat.com>2012-10-13 05:46:48 -0400
committerDavid Howells <dhowells@redhat.com>2012-10-13 05:46:48 -0400
commit607ca46e97a1b6594b29647d98a32d545c24bdff (patch)
tree30f4c0784bfddb57332cdc0678bd06d1e77fa185 /include/linux/virtio_blk.h
parent08cce05c5a91f5017f4edc9866cf026908c73f9f (diff)
UAPI: (Scripted) Disintegrate include/linux
Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Michael Kerrisk <mtk.manpages@gmail.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Dave Jones <davej@redhat.com>
Diffstat (limited to 'include/linux/virtio_blk.h')
-rw-r--r--include/linux/virtio_blk.h130
1 files changed, 0 insertions, 130 deletions
diff --git a/include/linux/virtio_blk.h b/include/linux/virtio_blk.h
deleted file mode 100644
index 6d8e61c48563..000000000000
--- a/include/linux/virtio_blk.h
+++ /dev/null
@@ -1,130 +0,0 @@
1#ifndef _LINUX_VIRTIO_BLK_H
2#define _LINUX_VIRTIO_BLK_H
3/* This header is BSD licensed so anyone can use the definitions to implement
4 * compatible drivers/servers.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of IBM nor the names of its contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE. */
28#include <linux/types.h>
29#include <linux/virtio_ids.h>
30#include <linux/virtio_config.h>
31
32/* Feature bits */
33#define VIRTIO_BLK_F_BARRIER 0 /* Does host support barriers? */
34#define VIRTIO_BLK_F_SIZE_MAX 1 /* Indicates maximum segment size */
35#define VIRTIO_BLK_F_SEG_MAX 2 /* Indicates maximum # of segments */
36#define VIRTIO_BLK_F_GEOMETRY 4 /* Legacy geometry available */
37#define VIRTIO_BLK_F_RO 5 /* Disk is read-only */
38#define VIRTIO_BLK_F_BLK_SIZE 6 /* Block size of disk is available*/
39#define VIRTIO_BLK_F_SCSI 7 /* Supports scsi command passthru */
40#define VIRTIO_BLK_F_WCE 9 /* Writeback mode enabled after reset */
41#define VIRTIO_BLK_F_TOPOLOGY 10 /* Topology information is available */
42#define VIRTIO_BLK_F_CONFIG_WCE 11 /* Writeback mode available in config */
43
44#ifndef __KERNEL__
45/* Old (deprecated) name for VIRTIO_BLK_F_WCE. */
46#define VIRTIO_BLK_F_FLUSH VIRTIO_BLK_F_WCE
47#endif
48
49#define VIRTIO_BLK_ID_BYTES 20 /* ID string length */
50
51struct virtio_blk_config {
52 /* The capacity (in 512-byte sectors). */
53 __u64 capacity;
54 /* The maximum segment size (if VIRTIO_BLK_F_SIZE_MAX) */
55 __u32 size_max;
56 /* The maximum number of segments (if VIRTIO_BLK_F_SEG_MAX) */
57 __u32 seg_max;
58 /* geometry the device (if VIRTIO_BLK_F_GEOMETRY) */
59 struct virtio_blk_geometry {
60 __u16 cylinders;
61 __u8 heads;
62 __u8 sectors;
63 } geometry;
64
65 /* block size of device (if VIRTIO_BLK_F_BLK_SIZE) */
66 __u32 blk_size;
67
68 /* the next 4 entries are guarded by VIRTIO_BLK_F_TOPOLOGY */
69 /* exponent for physical block per logical block. */
70 __u8 physical_block_exp;
71 /* alignment offset in logical blocks. */
72 __u8 alignment_offset;
73 /* minimum I/O size without performance penalty in logical blocks. */
74 __u16 min_io_size;
75 /* optimal sustained I/O size in logical blocks. */
76 __u32 opt_io_size;
77
78 /* writeback mode (if VIRTIO_BLK_F_CONFIG_WCE) */
79 __u8 wce;
80} __attribute__((packed));
81
82/*
83 * Command types
84 *
85 * Usage is a bit tricky as some bits are used as flags and some are not.
86 *
87 * Rules:
88 * VIRTIO_BLK_T_OUT may be combined with VIRTIO_BLK_T_SCSI_CMD or
89 * VIRTIO_BLK_T_BARRIER. VIRTIO_BLK_T_FLUSH is a command of its own
90 * and may not be combined with any of the other flags.
91 */
92
93/* These two define direction. */
94#define VIRTIO_BLK_T_IN 0
95#define VIRTIO_BLK_T_OUT 1
96
97/* This bit says it's a scsi command, not an actual read or write. */
98#define VIRTIO_BLK_T_SCSI_CMD 2
99
100/* Cache flush command */
101#define VIRTIO_BLK_T_FLUSH 4
102
103/* Get device ID command */
104#define VIRTIO_BLK_T_GET_ID 8
105
106/* Barrier before this op. */
107#define VIRTIO_BLK_T_BARRIER 0x80000000
108
109/* This is the first element of the read scatter-gather list. */
110struct virtio_blk_outhdr {
111 /* VIRTIO_BLK_T* */
112 __u32 type;
113 /* io priority. */
114 __u32 ioprio;
115 /* Sector (ie. 512 byte offset) */
116 __u64 sector;
117};
118
119struct virtio_scsi_inhdr {
120 __u32 errors;
121 __u32 data_len;
122 __u32 sense_len;
123 __u32 residual;
124};
125
126/* And this is the final byte of the write scatter-gather list. */
127#define VIRTIO_BLK_S_OK 0
128#define VIRTIO_BLK_S_IOERR 1
129#define VIRTIO_BLK_S_UNSUPP 2
130#endif /* _LINUX_VIRTIO_BLK_H */
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-17 05:28:03 -0400