#define VIRTIO_BLK_F_WCACHE 9 /* write cache enabled */
#define VIRTIO_BLK_F_TOPOLOGY 10 /* Topology information is available */
+#define VIRTIO_BLK_ID_BYTES 20 /* ID string length */
+
struct virtio_blk_config
{
uint64_t capacity;
uint16_t cylinders;
uint8_t heads;
uint8_t sectors;
- uint32_t _blk_size; /* structure pad, currently unused */
+ uint32_t blk_size;
uint8_t physical_block_exp;
uint8_t alignment_offset;
uint16_t min_io_size;
/* Flush the volatile write cache */
#define VIRTIO_BLK_T_FLUSH 4
+/* return the device ID string */
+#define VIRTIO_BLK_T_GET_ID 8
+
/* Barrier before this op. */
#define VIRTIO_BLK_T_BARRIER 0x80000000