1 /**************************************************************************** 2 **************************************************************************** 3 *** 4 *** This header was automatically generated from a Linux kernel header 5 *** of the same name, to make information necessary for userspace to 6 *** call into the kernel available to libc. It contains only constants, 7 *** structures, and macros generated from the original header, and thus, 8 *** contains no copyrightable information. 9 *** 10 *** To edit the content of this header, modify the corresponding 11 *** source file (e.g. under external/kernel-headers/original/) then 12 *** run bionic/libc/kernel/tools/update_all.py 13 *** 14 *** Any manual change here will be lost the next time this script will 15 *** be run. You've been warned! 16 *** 17 **************************************************************************** 18 ****************************************************************************/ 19 #ifndef _LINUX_VIRTIO_BLK_H 20 #define _LINUX_VIRTIO_BLK_H 21 #include <linux/types.h> 22 #include <linux/virtio_ids.h> 23 #include <linux/virtio_config.h> 24 #include <linux/virtio_types.h> 25 #define VIRTIO_BLK_F_SIZE_MAX 1 26 #define VIRTIO_BLK_F_SEG_MAX 2 27 #define VIRTIO_BLK_F_GEOMETRY 4 28 #define VIRTIO_BLK_F_RO 5 29 #define VIRTIO_BLK_F_BLK_SIZE 6 30 #define VIRTIO_BLK_F_TOPOLOGY 10 31 #define VIRTIO_BLK_F_MQ 12 32 #define VIRTIO_BLK_F_DISCARD 13 33 #define VIRTIO_BLK_F_WRITE_ZEROES 14 34 #ifndef VIRTIO_BLK_NO_LEGACY 35 #define VIRTIO_BLK_F_BARRIER 0 36 #define VIRTIO_BLK_F_SCSI 7 37 #define VIRTIO_BLK_F_FLUSH 9 38 #define VIRTIO_BLK_F_CONFIG_WCE 11 39 #define VIRTIO_BLK_F_WCE VIRTIO_BLK_F_FLUSH 40 #endif 41 #define VIRTIO_BLK_ID_BYTES 20 42 struct virtio_blk_config { 43 __virtio64 capacity; 44 __virtio32 size_max; 45 __virtio32 seg_max; 46 struct virtio_blk_geometry { 47 __virtio16 cylinders; 48 __u8 heads; 49 __u8 sectors; 50 } geometry; 51 __virtio32 blk_size; 52 __u8 physical_block_exp; 53 __u8 alignment_offset; 54 __virtio16 min_io_size; 55 __virtio32 opt_io_size; 56 __u8 wce; 57 __u8 unused; 58 __virtio16 num_queues; 59 __virtio32 max_discard_sectors; 60 __virtio32 max_discard_seg; 61 __virtio32 discard_sector_alignment; 62 __virtio32 max_write_zeroes_sectors; 63 __virtio32 max_write_zeroes_seg; 64 __u8 write_zeroes_may_unmap; 65 __u8 unused1[3]; 66 } __attribute__((packed)); 67 #define VIRTIO_BLK_T_IN 0 68 #define VIRTIO_BLK_T_OUT 1 69 #ifndef VIRTIO_BLK_NO_LEGACY 70 #define VIRTIO_BLK_T_SCSI_CMD 2 71 #endif 72 #define VIRTIO_BLK_T_FLUSH 4 73 #define VIRTIO_BLK_T_GET_ID 8 74 #define VIRTIO_BLK_T_DISCARD 11 75 #define VIRTIO_BLK_T_WRITE_ZEROES 13 76 #ifndef VIRTIO_BLK_NO_LEGACY 77 #define VIRTIO_BLK_T_BARRIER 0x80000000 78 #endif 79 struct virtio_blk_outhdr { 80 __virtio32 type; 81 __virtio32 ioprio; 82 __virtio64 sector; 83 }; 84 #define VIRTIO_BLK_WRITE_ZEROES_FLAG_UNMAP 0x00000001 85 struct virtio_blk_discard_write_zeroes { 86 __le64 sector; 87 __le32 num_sectors; 88 __le32 flags; 89 }; 90 #ifndef VIRTIO_BLK_NO_LEGACY 91 struct virtio_scsi_inhdr { 92 __virtio32 errors; 93 __virtio32 data_len; 94 __virtio32 sense_len; 95 __virtio32 residual; 96 }; 97 #endif 98 #define VIRTIO_BLK_S_OK 0 99 #define VIRTIO_BLK_S_IOERR 1 100 #define VIRTIO_BLK_S_UNSUPP 2 101 #endif 102