virtioblk.h

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#ifndef __VIRTIO_BLK_H__
#define __VIRTIO_BLK_H__
 
#include <aurora.h>
 
#define VIRTIO_BLK_BLOCK_SZ 512
 
#define VIRTIO_BLK_OP_IN           0
#define VIRTIO_BLK_OP_OUT          1
#define VIRTIO_BLK_T_FLUSH         4
#define VIRTIO_BLK_T_GET_ID        8
#define VIRTIO_BLK_T_GET_LIFETIME 10
#define VIRTIO_BLK_T_DISCARD      11
#define VIRTIO_BLK_T_WRITE_ZEROES 13
#define VIRTIO_BLK_T_SECURE_ERASE 14
 
 
 
enum {
    VIRTIO_BLK_S_OK,
    VIRTIO_BLK_S_IOERR,
    VIRTIO_BLK_S_UNSUPP
};
 
#define RQ_BUFFERS 32
#define VIRTIO_BLK_F_RO  (1u << 5)
 
typedef struct {
    uint32_t type;
    uint32_t reserved;
    uint64_t sector;
}virtio_blk_req_header_t;
 
typedef struct {
    uint8_t status;
}virtio_blk_req_footer_t;
 
typedef struct {
    uint64_t capacity;
}virtio_blk_cfg_t;
 
struct virtio_blk_discard_write_zeroes {
    uint64_t sector;
    uint32_t num_sectors;
    struct {
        uint32_t unmap : 1;
        uint32_t reserved : 31;
    }flags;
};
 
struct virtio_blk_lifetime {
    uint16_t pre_eol_info;
    uint64_t device_lifetime_est_type_a;
    uint64_t device_lifetime_est_type_b;
};
 
struct virtioblk_dev_config {
    uint64_t capacity;
    uint32_t size_max;
    uint32_t seg_max;
    struct virtio_blk_geometry {
        uint16_t cylinders;
        uint8_t heads;
        uint8_t sectors;
    }geometry;
    uint32_t blk_sz;
    struct virtio_blk_topology {
        uint8_t physical_block_exp;
        uint8_t alignment_offset;
        uint16_t min_io_size;
        uint32_t opt_io_size;
    }topology;
    uint8_t writeback;
    uint8_t unused0;
    uint16_t num_queues;
    uint32_t max_discard_sectors;
    uint32_t max_discard_seg;
    uint32_t discard_sector_alignment;
    uint32_t max_write_zeroes_sectors;
    uint32_t max_write_zeroes_seg;
    uint8_t write_zeroes_may_unmap;
    uint8_t unused[3];
    uint32_t max_secure_erase_sectors;
    uint32_t max_secure_erase_seg;
    uint32_t secure_erase_sector_alignment;
    struct virtio_blk_zoned_characteristics {
        uint32_t zone_sectors;
        uint32_t max_open_zones;
        uint32_t max_active_zones;
        uint32_t max_append_sectors;
        uint32_t write_granularity;
        uint8_t model;
        uint8_t unused2[3];
    }zoned;
};
#endif