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37 lines
937 B
37 lines
937 B
#pragma once
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struct ftl_page_group {
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uint8_t magic[3];
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uint8_t epoch;
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uint32_t tail;
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} __attribute__((packed));
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struct ftl_page_desc {
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uint32_t va;
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uint32_t nused_pages;
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uint32_t subtrees[32];
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} __attribute__((packed));
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struct ftl_map {
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struct flash_dev *dev;
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uint32_t head, tail;
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uint32_t root;
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uint32_t nused_pages;
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uint32_t nblocks;
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uint8_t log2_groups_per_block;
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uint8_t log2_pages_per_group;
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uint8_t log2_page_size;
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uint8_t log2_block_size;
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uint8_t log2_erase_size;
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uint8_t epoch;
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};
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#define FTL_MAX_ATTEMPTS 8
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int ftl_init_map(struct ftl_map *map, struct flash_dev *dev);
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int ftl_resume_map(struct ftl_map *map);
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int ftl_write(struct ftl_map *map, uint32_t addr, const uint8_t *data);
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int ftl_read(struct ftl_map *map, void *data, size_t len, uint32_t va);
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int ftl_trim(struct ftl_map *map, uint32_t va);
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uint32_t ftl_get_size(const struct ftl_map *map);
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uint32_t ftl_get_capacity(const struct ftl_map *map);
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