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 #ifndef VIRTIO_BLK_NO_LEGACY 33 #define VIRTIO_BLK_F_BARRIER 0 34 #define VIRTIO_BLK_F_SCSI 7 35 #define VIRTIO_BLK_F_FLUSH 9 36 #define VIRTIO_BLK_F_CONFIG_WCE 11 37 #define VIRTIO_BLK_F_WCE VIRTIO_BLK_F_FLUSH 38 #endif 39 #define VIRTIO_BLK_ID_BYTES 20 40 struct virtio_blk_config { 41 __u64 capacity; 42 __u32 size_max; 43 __u32 seg_max; 44 struct virtio_blk_geometry { 45 __u16 cylinders; 46 __u8 heads; 47 __u8 sectors; 48 } geometry; 49 __u32 blk_size; 50 __u8 physical_block_exp; 51 __u8 alignment_offset; 52 __u16 min_io_size; 53 __u32 opt_io_size; 54 __u8 wce; 55 __u8 unused; 56 __u16 num_queues; 57 } __attribute__((packed)); 58 #define VIRTIO_BLK_T_IN 0 59 #define VIRTIO_BLK_T_OUT 1 60 #ifndef VIRTIO_BLK_NO_LEGACY 61 #define VIRTIO_BLK_T_SCSI_CMD 2 62 #endif 63 #define VIRTIO_BLK_T_FLUSH 4 64 #define VIRTIO_BLK_T_GET_ID 8 65 #ifndef VIRTIO_BLK_NO_LEGACY 66 #define VIRTIO_BLK_T_BARRIER 0x80000000 67 #endif 68 struct virtio_blk_outhdr { 69 __virtio32 type; 70 __virtio32 ioprio; 71 __virtio64 sector; 72 }; 73 #ifndef VIRTIO_BLK_NO_LEGACY 74 struct virtio_scsi_inhdr { 75 __virtio32 errors; 76 __virtio32 data_len; 77 __virtio32 sense_len; 78 __virtio32 residual; 79 }; 80 #endif 81 #define VIRTIO_BLK_S_OK 0 82 #define VIRTIO_BLK_S_IOERR 1 83 #define VIRTIO_BLK_S_UNSUPP 2 84 #endif 85