107 lines
2.7 KiB
C
107 lines
2.7 KiB
C
/*
|
|
* Copyright (c) 2006-2021, RT-Thread Development Team
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
* 2021-9-16 GuEe-GUI the first version
|
|
* 2021-11-11 GuEe-GUI using virtio common interface
|
|
*/
|
|
|
|
#ifndef __VIRTIO_BLK_H__
|
|
#define __VIRTIO_BLK_H__
|
|
|
|
#include <rtdef.h>
|
|
|
|
#include <virtio.h>
|
|
|
|
#define VIRTIO_BLK_QUEUE 0
|
|
#define VIRTIO_BLK_BUF_DATA_SIZE 512
|
|
#define VIRTIO_BLK_BYTES_PER_SECTOR 512
|
|
#define VIRTIO_BLK_BLOCK_SIZE 512
|
|
#define VIRTIO_BLK_QUEUE_RING_SIZE 4
|
|
|
|
#define VIRTIO_BLK_F_RO 5 /* Disk is read-only */
|
|
#define VIRTIO_BLK_F_SCSI 7 /* Supports scsi command passthru */
|
|
#define VIRTIO_BLK_F_CONFIG_WCE 11 /* Writeback mode available in config */
|
|
#define VIRTIO_BLK_F_MQ 12 /* Support more than one vq */
|
|
|
|
#define VIRTIO_BLK_T_IN 0 /* Read the blk */
|
|
#define VIRTIO_BLK_T_OUT 1 /* Write the blk */
|
|
#define VIRTIO_BLK_T_SCSI_CMD 2
|
|
#define VIRTIO_BLK_T_SCSI_CMD_OUT 3
|
|
#define VIRTIO_BLK_T_FLUSH 4
|
|
#define VIRTIO_BLK_T_FLUSH_OUT 5
|
|
|
|
struct virtio_blk_req
|
|
{
|
|
rt_uint32_t type;
|
|
rt_uint32_t ioprio;
|
|
rt_uint64_t sector;
|
|
};
|
|
|
|
struct virtio_blk_config
|
|
{
|
|
rt_uint64_t capacity;
|
|
rt_uint32_t size_max;
|
|
rt_uint32_t seg_max;
|
|
|
|
struct virtio_blk_geometry
|
|
{
|
|
rt_uint16_t cylinders;
|
|
rt_uint8_t heads;
|
|
rt_uint8_t sectors;
|
|
} geometry;
|
|
|
|
rt_uint32_t blk_size;
|
|
|
|
struct virtio_blk_topology
|
|
{
|
|
/* # Of logical blocks per physical block (log2) */
|
|
rt_uint8_t physical_block_exp;
|
|
/* Offset of first aligned logical block */
|
|
rt_uint8_t alignment_offset;
|
|
/* Suggested minimum I/O size in blocks */
|
|
rt_uint16_t min_io_size;
|
|
/* Optimal (suggested maximum) I/O size in blocks */
|
|
rt_uint32_t opt_io_size;
|
|
} topology;
|
|
|
|
rt_uint8_t writeback;
|
|
rt_uint8_t unused0;
|
|
rt_uint16_t num_queues;
|
|
rt_uint32_t max_discard_sectors;
|
|
rt_uint32_t max_discard_seg;
|
|
rt_uint32_t discard_sector_alignment;
|
|
rt_uint32_t max_write_zeroes_sectors;
|
|
rt_uint32_t max_write_zeroes_seg;
|
|
rt_uint8_t write_zeroes_may_unmap;
|
|
rt_uint8_t unused1[3];
|
|
rt_uint32_t max_secure_erase_sectors;
|
|
rt_uint32_t max_secure_erase_seg;
|
|
rt_uint32_t secure_erase_sector_alignment;
|
|
} __attribute__((packed));
|
|
|
|
struct virtio_blk_device
|
|
{
|
|
struct rt_device parent;
|
|
|
|
struct virtio_device virtio_dev;
|
|
|
|
struct virtio_blk_config *config;
|
|
|
|
struct
|
|
{
|
|
rt_bool_t valid;
|
|
rt_uint8_t status;
|
|
|
|
struct virtio_blk_req req;
|
|
|
|
} info[VIRTIO_BLK_QUEUE_RING_SIZE];
|
|
};
|
|
|
|
rt_err_t rt_virtio_blk_init(rt_ubase_t *mmio_base, rt_uint32_t irq);
|
|
|
|
#endif /* __VIRTIO_BLK_H__ */
|