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import RT-Thread@9217865c without bsp, libcpu and components/net

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This commit is contained in:
Zihao Yu 2023-05-20 16:23:33 +08:00
commit e2376a3709
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105
components/drivers/virtio/virtio_blk.h Normal file
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/*
* Copyright (c) 2006-2023, 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_BYTES_PER_SECTOR 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; /* The capacity (in 512-byte sectors). */
rt_uint32_t size_max; /* The maximum segment size (if VIRTIO_BLK_F_SIZE_MAX) */
rt_uint32_t seg_max; /* The maximum number of segments (if VIRTIO_BLK_F_SEG_MAX) */
/* Geometry of the device (if VIRTIO_BLK_F_GEOMETRY) */
struct virtio_blk_geometry
{
rt_uint16_t cylinders;
rt_uint8_t heads;
rt_uint8_t sectors;
} geometry;
rt_uint32_t blk_size; /* Block size of device (if VIRTIO_BLK_F_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__ */