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Diffstat (limited to 'include/linux/virtio_blk.h')
| -rw-r--r-- | include/linux/virtio_blk.h | 130 |
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 @@ -#ifndef _LINUX_VIRTIO_BLK_H -#define _LINUX_VIRTIO_BLK_H -/* This header is BSD licensed so anyone can use the definitions to implement - * compatible drivers/servers. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of IBM nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. */ -#include <linux/types.h> -#include <linux/virtio_ids.h> -#include <linux/virtio_config.h> - -/* Feature bits */ -#define VIRTIO_BLK_F_BARRIER 0 /* Does host support barriers? */ -#define VIRTIO_BLK_F_SIZE_MAX 1 /* Indicates maximum segment size */ -#define VIRTIO_BLK_F_SEG_MAX 2 /* Indicates maximum # of segments */ -#define VIRTIO_BLK_F_GEOMETRY 4 /* Legacy geometry available */ -#define VIRTIO_BLK_F_RO 5 /* Disk is read-only */ -#define VIRTIO_BLK_F_BLK_SIZE 6 /* Block size of disk is available*/ -#define VIRTIO_BLK_F_SCSI 7 /* Supports scsi command passthru */ -#define VIRTIO_BLK_F_WCE 9 /* Writeback mode enabled after reset */ -#define VIRTIO_BLK_F_TOPOLOGY 10 /* Topology information is available */ -#define VIRTIO_BLK_F_CONFIG_WCE 11 /* Writeback mode available in config */ - -#ifndef __KERNEL__ -/* Old (deprecated) name for VIRTIO_BLK_F_WCE. */ -#define VIRTIO_BLK_F_FLUSH VIRTIO_BLK_F_WCE -#endif - -#define VIRTIO_BLK_ID_BYTES 20 /* ID string length */ - -struct virtio_blk_config { - /* The capacity (in 512-byte sectors). */ - __u64 capacity; - /* The maximum segment size (if VIRTIO_BLK_F_SIZE_MAX) */ - __u32 size_max; - /* The maximum number of segments (if VIRTIO_BLK_F_SEG_MAX) */ - __u32 seg_max; - /* geometry the device (if VIRTIO_BLK_F_GEOMETRY) */ - struct virtio_blk_geometry { - __u16 cylinders; - __u8 heads; - __u8 sectors; - } geometry; - - /* block size of device (if VIRTIO_BLK_F_BLK_SIZE) */ - __u32 blk_size; - - /* the next 4 entries are guarded by VIRTIO_BLK_F_TOPOLOGY */ - /* exponent for physical block per logical block. */ - __u8 physical_block_exp; - /* alignment offset in logical blocks. */ - __u8 alignment_offset; - /* minimum I/O size without performance penalty in logical blocks. */ - __u16 min_io_size; - /* optimal sustained I/O size in logical blocks. */ - __u32 opt_io_size; - - /* writeback mode (if VIRTIO_BLK_F_CONFIG_WCE) */ - __u8 wce; -} __attribute__((packed)); - -/* - * Command types - * - * Usage is a bit tricky as some bits are used as flags and some are not. - * - * Rules: - * VIRTIO_BLK_T_OUT may be combined with VIRTIO_BLK_T_SCSI_CMD or - * VIRTIO_BLK_T_BARRIER. VIRTIO_BLK_T_FLUSH is a command of its own - * and may not be combined with any of the other flags. - */ - -/* These two define direction. */ -#define VIRTIO_BLK_T_IN 0 -#define VIRTIO_BLK_T_OUT 1 - -/* This bit says it's a scsi command, not an actual read or write. */ -#define VIRTIO_BLK_T_SCSI_CMD 2 - -/* Cache flush command */ -#define VIRTIO_BLK_T_FLUSH 4 - -/* Get device ID command */ -#define VIRTIO_BLK_T_GET_ID 8 - -/* Barrier before this op. */ -#define VIRTIO_BLK_T_BARRIER 0x80000000 - -/* This is the first element of the read scatter-gather list. */ -struct virtio_blk_outhdr { - /* VIRTIO_BLK_T* */ - __u32 type; - /* io priority. */ - __u32 ioprio; - /* Sector (ie. 512 byte offset) */ - __u64 sector; -}; - -struct virtio_scsi_inhdr { - __u32 errors; - __u32 data_len; - __u32 sense_len; - __u32 residual; -}; - -/* And this is the final byte of the write scatter-gather list. */ -#define VIRTIO_BLK_S_OK 0 -#define VIRTIO_BLK_S_IOERR 1 -#define VIRTIO_BLK_S_UNSUPP 2 -#endif /* _LINUX_VIRTIO_BLK_H */ |