78 lines
2.8 KiB
C
78 lines
2.8 KiB
C
// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
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/* Copyright 2013-2017 IBM Corp. */
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#ifndef __LIBFLASH_BLOCKLEVEL_H
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#define __LIBFLASH_BLOCKLEVEL_H
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#include <stdint.h>
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#include <stdbool.h>
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struct bl_prot_range {
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uint64_t start;
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uint64_t len;
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};
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struct blocklevel_range {
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struct bl_prot_range *prot;
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int n_prot;
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int total_prot;
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};
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enum blocklevel_flags {
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WRITE_NEED_ERASE = 1,
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};
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/*
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* libffs may be used with different backends, all should provide these for
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* libflash to get the information it needs
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*/
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struct blocklevel_device {
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void *priv;
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int (*reacquire)(struct blocklevel_device *bl);
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int (*release)(struct blocklevel_device *bl);
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int (*read)(struct blocklevel_device *bl, uint64_t pos, void *buf, uint64_t len);
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int (*write)(struct blocklevel_device *bl, uint64_t pos, const void *buf, uint64_t len);
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int (*erase)(struct blocklevel_device *bl, uint64_t pos, uint64_t len);
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int (*get_info)(struct blocklevel_device *bl, const char **name, uint64_t *total_size,
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uint32_t *erase_granule);
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bool (*exit)(struct blocklevel_device *bl);
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/*
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* Keep the erase mask so that blocklevel_erase() can do sanity checking
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*/
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uint32_t erase_mask;
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bool keep_alive;
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enum blocklevel_flags flags;
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struct blocklevel_range ecc_prot;
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};
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int blocklevel_raw_read(struct blocklevel_device *bl, uint64_t pos, void *buf, uint64_t len);
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int blocklevel_read(struct blocklevel_device *bl, uint64_t pos, void *buf, uint64_t len);
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int blocklevel_raw_write(struct blocklevel_device *bl, uint64_t pos, const void *buf, uint64_t len);
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int blocklevel_write(struct blocklevel_device *bl, uint64_t pos, const void *buf, uint64_t len);
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int blocklevel_erase(struct blocklevel_device *bl, uint64_t pos, uint64_t len);
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int blocklevel_get_info(struct blocklevel_device *bl, const char **name, uint64_t *total_size,
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uint32_t *erase_granule);
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/*
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* blocklevel_smart_write() performs reads on the data to see if it
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* can skip erase or write calls. This is likely more convenient for
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* the caller since they don't need to perform these checks
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* themselves. Depending on the new and old data, this may be faster
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* or slower than the just using blocklevel_erase/write calls.
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* directly.
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*/
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int blocklevel_smart_write(struct blocklevel_device *bl, uint64_t pos, const void *buf, uint64_t len);
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/*
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* blocklevel_smart_erase() will handle unaligned erases.
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* blocklevel_erase() expects a erase_granule aligned buffer and the
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* erase length to be an exact multiple of erase_granule,
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* blocklevel_smart_erase() solves this requirement by performing a
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* read erase write under the hood.
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*/
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int blocklevel_smart_erase(struct blocklevel_device *bl, uint64_t pos, uint64_t len);
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/* Implemented in software at this level */
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int blocklevel_ecc_protect(struct blocklevel_device *bl, uint32_t start, uint32_t len);
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#endif /* __LIBFLASH_BLOCKLEVEL_H */
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