86 lines
2.0 KiB
C
86 lines
2.0 KiB
C
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/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2021-9-16 GuEe-GUI the first version
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*/
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#ifndef DRV_VIRTIO_BLK_H__
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#define DRV_VIRTIO_BLK_H__
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#include <rthw.h>
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#include <stdint.h>
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#include "virtio.h"
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#define VIRTIO_BLK_BUF_DATA_SIZE 512
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#define VIRTIO_BLK_BYTES_PER_SECTOR 512
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#define VIRTIO_BLK_BLOCK_SIZE 512
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#define VIRTIO_BLK_SECTOR_COUNT 0x40000 /* 128MB */
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#define VIRTIO_BLK_F_RO 5 /* Disk is read-only */
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#define VIRTIO_BLK_F_SCSI 7 /* Supports scsi command passthru */
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#define VIRTIO_BLK_F_CONFIG_WCE 11 /* Writeback mode available in config */
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#define VIRTIO_BLK_F_MQ 12 /* Support more than one vq */
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#define VIRTIO_BLK_T_IN 0 /* Read the blk */
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#define VIRTIO_BLK_T_OUT 1 /* Write the blk */
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#define VIRTIO_F_ANY_LAYOUT 27
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#define VIRTIO_RING_F_INDIRECT_DESC 28
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#define VIRTIO_RING_F_EVENT_IDX 29
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struct virtio_blk_buf
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{
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int valid;
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uint32_t block_no;
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uint8_t *data;
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};
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struct virtio_blk_req
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{
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uint32_t type;
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uint32_t reserved;
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uint64_t sector;
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};
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/*
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* virtio_blk must be a static variable because
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* pages must consist of two contiguous pages of
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* page-aligned physical memory
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*/
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struct virtio_blk
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{
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char pages[2 * PAGE_SIZE];
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struct virtq_desc *desc;
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struct virtq_avail *avail;
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struct virtq_used *used;
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char free[QUEUE_SIZE];
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uint16_t used_idx;
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struct
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{
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struct virtio_blk_buf *buf;
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char status;
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} info[QUEUE_SIZE];
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struct virtio_blk_req ops[QUEUE_SIZE];
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} __attribute__ ((aligned (PAGE_SIZE)));
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struct virtio_blk_device
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{
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struct rt_device parent;
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struct virtio_blk *blk;
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uint32_t *mmio_base;
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#ifdef RT_USING_SMP
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struct rt_spinlock spinlock;
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#endif
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};
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int rt_hw_virtio_blk_init(void);
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#endif /* DRV_VIRTIO_BLK_H__ */
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