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Diffstat (limited to 'include/libflashrom.h')
| -rw-r--r-- | include/libflashrom.h | 598 |
1 files changed, 598 insertions, 0 deletions
diff --git a/include/libflashrom.h b/include/libflashrom.h new file mode 100644 index 000000000..e87776be1 --- /dev/null +++ b/include/libflashrom.h @@ -0,0 +1,598 @@ +/* + * This file is part of the flashrom project. + * + * Copyright (C) 2010 Google Inc. + * Copyright (C) 2012 secunet Security Networks AG + * (Written by Nico Huber <nico.huber@secunet.com> for secunet) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef __LIBFLASHROM_H__ +#define __LIBFLASHROM_H__ 1 + +/** + * @mainpage + * + * Have a look at the Modules section for a function reference. + */ + +#include <sys/types.h> +#include <stddef.h> +#include <stdbool.h> +#include <stdint.h> +#include <stdarg.h> + +/** + * @defgroup flashrom-general General + * @{ + */ + +/** + * @brief Initialize libflashrom. + * + * @param perform_selfcheck If not zero, perform a self check. + * @return 0 on success + */ +int flashrom_init(int perform_selfcheck); +/** + * @brief Shut down libflashrom. + * @return 0 on success + */ +int flashrom_shutdown(void); +enum flashrom_log_level { + FLASHROM_MSG_ERROR = 0, + FLASHROM_MSG_WARN = 1, + FLASHROM_MSG_INFO = 2, + FLASHROM_MSG_DEBUG = 3, + FLASHROM_MSG_DEBUG2 = 4, + FLASHROM_MSG_SPEW = 5, +}; +typedef int(flashrom_log_callback)(enum flashrom_log_level, const char *format, va_list); +/** + * @brief Set the log callback function. + * + * Set a callback function which will be invoked whenever libflashrom wants + * to output messages. This allows frontends to do whatever they see fit with + * such messages, e.g. write them to syslog, or to a file, or print them in a + * GUI window, etc. + * + * @param log_callback Pointer to the new log callback function. + */ +void flashrom_set_log_callback(flashrom_log_callback *log_callback); + +enum flashrom_progress_stage { + FLASHROM_PROGRESS_READ, + FLASHROM_PROGRESS_WRITE, + FLASHROM_PROGRESS_ERASE, + FLASHROM_PROGRESS_NR, +}; +struct flashrom_progress { + enum flashrom_progress_stage stage; + size_t current; + size_t total; + void *user_data; +}; +struct flashrom_flashctx; +typedef void(flashrom_progress_callback)(struct flashrom_flashctx *flashctx); +/** + * @brief Set the progress callback function. + * + * Set a callback function which will be invoked whenever libflashrom wants + * to indicate the progress has changed. This allows frontends to do whatever + * they see fit with such values, e.g. update a progress bar in a GUI tool. + * + * @param progress_callback Pointer to the new progress callback function. + * @param progress_state Pointer to progress state to include with the progress + * callback. + */ +void flashrom_set_progress_callback(struct flashrom_flashctx *const flashctx, + flashrom_progress_callback *progress_callback, struct flashrom_progress *progress_state); + +/** @} */ /* end flashrom-general */ + +/** + * @defgroup flashrom-query Querying + * @{ + */ + +enum flashrom_test_state { + FLASHROM_TESTED_OK = 0, + FLASHROM_TESTED_NT = 1, + FLASHROM_TESTED_BAD = 2, + FLASHROM_TESTED_DEP = 3, + FLASHROM_TESTED_NA = 4, +}; + +struct flashrom_flashchip_info { + const char *vendor; + const char *name; + unsigned int total_size; + struct flashrom_tested { + enum flashrom_test_state probe; + enum flashrom_test_state read; + enum flashrom_test_state erase; + enum flashrom_test_state write; + enum flashrom_test_state wp; + } tested; +}; + +struct flashrom_board_info { + const char *vendor; + const char *name; + enum flashrom_test_state working; +}; + +struct flashrom_chipset_info { + const char *vendor; + const char *chipset; + uint16_t vendor_id; + uint16_t chipset_id; + enum flashrom_test_state status; +}; + +/** + * @brief Returns flashrom version + * @return flashrom version + */ +const char *flashrom_version_info(void); +/** + * @brief Returns list of supported flash chips + * @return List of supported flash chips, or NULL if an error occurred + */ +struct flashrom_flashchip_info *flashrom_supported_flash_chips(void); +/** + * @brief Returns list of supported mainboards + * @return List of supported mainboards, or NULL if an error occurred + */ +struct flashrom_board_info *flashrom_supported_boards(void); +/** + * @brief Returns list of supported chipsets + * @return List of supported chipsets, or NULL if an error occurred + */ +struct flashrom_chipset_info *flashrom_supported_chipsets(void); +/** + * @brief Frees memory allocated by libflashrom API + * @param p Pointer to block of memory which should be freed + * @return 0 on success + */ +int flashrom_data_free(void *const p); + +/** @} */ /* end flashrom-query */ + +/** + * @defgroup flashrom-prog Programmers + * @{ + */ +struct flashrom_programmer; + +/** + * @brief Initialize the specified programmer. + * + * Currently, only one programmer may be initialized at a time. + * + * @param[out] flashprog Points to a pointer of type struct flashrom_programmer + * that will be set if programmer initialization succeeds. + * *flashprog has to be shutdown by the caller with @ref + * flashrom_programmer_shutdown. + * @param[in] prog_name Name of the programmer to initialize. + * @param[in] prog_params Pointer to programmer specific parameters. + * @return 0 on success + */ +int flashrom_programmer_init(struct flashrom_programmer **flashprog, const char *prog_name, const char *prog_params); +/** + * @brief Shut down the initialized programmer. + * + * @param flashprog The programmer to shut down. + * @return 0 on success + */ +int flashrom_programmer_shutdown(struct flashrom_programmer *flashprog); + +/** @} */ /* end flashrom-prog */ + +/** + * @defgroup flashrom-flash Flash chips + * @{ + */ + +/** + * @brief Probe for a flash chip. + * + * Probes for a flash chip and returns a flash context, that can be used + * later with flash chip and @ref flashrom-ops "image operations", if + * exactly one matching chip is found. + * + * @param[out] flashctx Points to a pointer of type struct flashrom_flashctx + * that will be set if exactly one chip is found. *flashctx + * has to be freed by the caller with @ref flashrom_flash_release. + * @param[in] flashprog The flash programmer used to access the chip. + * @param[in] chip_name Name of a chip to probe for, or NULL to probe for + * all known chips. + * @return 0 on success, + * 3 if multiple chips were found, + * 2 if no chip was found, + * or 1 on any other error. + */ +int flashrom_flash_probe(struct flashrom_flashctx **flashctx, const struct flashrom_programmer *flashprog, const char *chip_name); +/** + * @brief Returns the size of the specified flash chip in bytes. + * + * @param flashctx The queried flash context. + * @return Size of flash chip in bytes. + */ +size_t flashrom_flash_getsize(const struct flashrom_flashctx *flashctx); +/** + * @brief Erase the specified ROM chip. + * + * If a layout is set in the given flash context, only included regions + * will be erased. + * + * @param flashctx The context of the flash chip to erase. + * @return 0 on success. + */ +int flashrom_flash_erase(struct flashrom_flashctx *flashctx); +/** + * @brief Free a flash context. + * + * @param flashctx Flash context to free. + */ +void flashrom_flash_release(struct flashrom_flashctx *flashctx); + +enum flashrom_flag { + FLASHROM_FLAG_FORCE, + FLASHROM_FLAG_FORCE_BOARDMISMATCH, + FLASHROM_FLAG_VERIFY_AFTER_WRITE, + FLASHROM_FLAG_VERIFY_WHOLE_CHIP, + FLASHROM_FLAG_SKIP_UNREADABLE_REGIONS, + FLASHROM_FLAG_SKIP_UNWRITABLE_REGIONS, +}; + +/** + * @brief Set a flag in the given flash context. + * + * @param flashctx Flash context to alter. + * @param flag Flag that is to be set / cleared. + * @param value Value to set. + */ +void flashrom_flag_set(struct flashrom_flashctx *flashctx, enum flashrom_flag flag, bool value); +/** + * @brief Return the current value of a flag in the given flash context. + * + * @param flashctx Flash context to read from. + * @param flag Flag to be read. + * @return Current value of the flag. + */ +bool flashrom_flag_get(const struct flashrom_flashctx *flashctx, enum flashrom_flag flag); + +/** @} */ /* end flashrom-flash */ + +/** + * @defgroup flashrom-ops Operations + * @{ + */ + +/** + * @brief Read the current image from the specified ROM chip. + * + * If a layout is set in the specified flash context, only included regions + * will be read. + * + * @param flashctx The context of the flash chip. + * @param buffer Target buffer to write image to. + * @param buffer_len Size of target buffer in bytes. + * @return 0 on success, + * 2 if buffer_len is too small for the flash chip's contents, + * or 1 on any other failure. + */ +int flashrom_image_read(struct flashrom_flashctx *flashctx, void *buffer, size_t buffer_len); +/** + * @brief Write the specified image to the ROM chip. + * + * If a layout is set in the specified flash context, only erase blocks + * containing included regions will be touched. + * + * @param flashctx The context of the flash chip. + * @param buffer Source buffer to read image from (may be altered for full verification). + * @param buffer_len Size of source buffer in bytes. + * @param refbuffer If given, assume flash chip contains same data as `refbuffer`. + * @return 0 on success, + * 4 if buffer_len doesn't match the size of the flash chip, + * 3 if write was tried but nothing has changed, + * 2 if write failed and flash contents changed, + * or 1 on any other failure. + */ +int flashrom_image_write(struct flashrom_flashctx *flashctx, void *buffer, size_t buffer_len, const void *refbuffer); +/** + * @brief Verify the ROM chip's contents with the specified image. + * + * If a layout is set in the specified flash context, only included regions + * will be verified. + * + * @param flashctx The context of the flash chip. + * @param buffer Source buffer to verify with. + * @param buffer_len Size of source buffer in bytes. + * @return 0 on success, + * 3 if the chip's contents don't match, + * 2 if buffer_len doesn't match the size of the flash chip, + * or 1 on any other failure. + */ +int flashrom_image_verify(struct flashrom_flashctx *flashctx, const void *buffer, size_t buffer_len); + +/** @} */ /* end flashrom-ops */ + +/** + * @defgroup flashrom-layout Layout handling + * @{ + */ + +struct flashrom_layout; +/** + * @brief Create a new, empty layout. + * + * @param layout Pointer to returned layout reference. + * + * @return 0 on success, + * 1 if out of memory. + */ +int flashrom_layout_new(struct flashrom_layout **layout); + +/** + * @brief Read a layout from the Intel ICH descriptor in the flash. + * + * Optionally verify that the layout matches the one in the given + * descriptor dump. + * + * @param[out] layout Points to a struct flashrom_layout pointer that + * gets set if the descriptor is read and parsed + * successfully. + * @param[in] flashctx Flash context to read the descriptor from flash. + * @param[in] dump The descriptor dump to compare to or NULL. + * @param[in] len The length of the descriptor dump. + * + * @return 0 on success, + * 6 if descriptor parsing isn't implemented for the host, + * 5 if the descriptors don't match, + * 4 if the descriptor dump couldn't be parsed, + * 3 if the descriptor on flash couldn't be parsed, + * 2 if the descriptor on flash couldn't be read, + * 1 on any other error. + */ +int flashrom_layout_read_from_ifd(struct flashrom_layout **layout, struct flashrom_flashctx *flashctx, const void *dump, size_t len); +/** + * @brief Read a layout by searching the flash chip for fmap. + * + * @param[out] layout Points to a struct flashrom_layout pointer that + * gets set if the fmap is read and parsed successfully. + * @param[in] flashctx Flash context + * @param[in] offset Offset to begin searching for fmap. + * @param[in] length Length of address space to search. + * + * @return 0 on success, + * 3 if fmap parsing isn't implemented for the host, + * 2 if the fmap couldn't be read, + * 1 on any other error. + */ +int flashrom_layout_read_fmap_from_rom(struct flashrom_layout **layout, + struct flashrom_flashctx *flashctx, size_t offset, size_t length); +/** + * @brief Read a layout by searching a buffer for fmap. + * + * @param[out] layout Points to a struct flashrom_layout pointer that + * gets set if the fmap is read and parsed successfully. + * @param[in] flashctx Flash context + * @param[in] buffer Buffer to search in + * @param[in] len Size of buffer to search + * + * @return 0 on success, + * 3 if fmap parsing isn't implemented for the host, + * 2 if the fmap couldn't be read, + * 1 on any other error. + */ +int flashrom_layout_read_fmap_from_buffer(struct flashrom_layout **layout, + struct flashrom_flashctx *flashctx, const uint8_t *buffer, size_t len); +/** + * @brief Add a region to an existing layout. + * + * @param layout The existing layout. + * @param start Start address of the region. + * @param end End address (inclusive) of the region. + * @param name Name of the region. + * + * @return 0 on success, + * 1 if out of memory. + */ +int flashrom_layout_add_region(struct flashrom_layout *layout, size_t start, size_t end, const char *name); +/** + * @brief Mark given region as included. + * + * @param layout The layout to alter. + * @param name The name of the region to include. + * + * @return 0 on success, + * 1 if the given name can't be found. + */ +int flashrom_layout_include_region(struct flashrom_layout *layout, const char *name); +/** + * @brief Mark given region as not included. + * + * @param layout The layout to alter. + * @param name The name of the region to exclude. + * + * @return 0 on success, + * 1 if the given name can't be found. + */ +int flashrom_layout_exclude_region(struct flashrom_layout *layout, const char *name); +/** + * @brief Get given region's offset and length. + * + * @param[in] layout The existing layout. + * @param[in] name The name of the region. + * @param[out] start The start address to be written. + * @param[out] len The length of the region to be written. + * + * @return 0 on success, + * 1 if the given name can't be found. + */ +int flashrom_layout_get_region_range(struct flashrom_layout *layout, const char *name, + unsigned int *start, unsigned int *len); +/** + * @brief Free a layout. + * + * @param layout Layout to free. + */ +void flashrom_layout_release(struct flashrom_layout *layout); +/** + * @brief Set the active layout for a flash context. + * + * Note: The caller must not release the layout as long as it is used through + * the given flash context. + * + * @param flashctx Flash context whose layout will be set. + * @param layout Layout to bet set. + */ +void flashrom_layout_set(struct flashrom_flashctx *flashctx, const struct flashrom_layout *layout); + +/** @} */ /* end flashrom-layout */ + +/** + * @defgroup flashrom-wp Write Protect + * @{ + */ + +enum flashrom_wp_result { + FLASHROM_WP_OK = 0, + FLASHROM_WP_ERR_CHIP_UNSUPPORTED = 1, + FLASHROM_WP_ERR_OTHER = 2, + FLASHROM_WP_ERR_READ_FAILED = 3, + FLASHROM_WP_ERR_WRITE_FAILED = 4, + FLASHROM_WP_ERR_VERIFY_FAILED = 5, + FLASHROM_WP_ERR_RANGE_UNSUPPORTED = 6, + FLASHROM_WP_ERR_MODE_UNSUPPORTED = 7, + FLASHROM_WP_ERR_RANGE_LIST_UNAVAILABLE = 8, + FLASHROM_WP_ERR_UNSUPPORTED_STATE = 9 +}; + +enum flashrom_wp_mode { + FLASHROM_WP_MODE_DISABLED, + FLASHROM_WP_MODE_HARDWARE, + FLASHROM_WP_MODE_POWER_CYCLE, + FLASHROM_WP_MODE_PERMANENT +}; +struct flashrom_wp_cfg; +struct flashrom_wp_ranges; +/** + * @brief Create a new empty WP configuration. + * + * @param[out] cfg Points to a pointer of type struct flashrom_wp_cfg that will + * be set if creation succeeds. *cfg has to be freed by the + * caller with @ref flashrom_wp_cfg_release. + * @return 0 on success + * >0 on failure + */ +enum flashrom_wp_result flashrom_wp_cfg_new(struct flashrom_wp_cfg **cfg); +/** + * @brief Free a WP configuration. + * + * @param[in] cfg Pointer to the flashrom_wp_cfg to free. + */ +void flashrom_wp_cfg_release(struct flashrom_wp_cfg *cfg); +/** + * @brief Set the protection mode for a WP configuration. + * + * @param[in] mode The protection mode to set. + * @param[out] cfg Pointer to the flashrom_wp_cfg structure to modify. + */ +void flashrom_wp_set_mode(struct flashrom_wp_cfg *cfg, enum flashrom_wp_mode mode); +/** + * @brief Get the protection mode from a WP configuration. + * + * @param[in] cfg The WP configuration to get the protection mode from. + * @return The configuration's protection mode. + */ +enum flashrom_wp_mode flashrom_wp_get_mode(const struct flashrom_wp_cfg *cfg); +/** + * @brief Set the protection range for a WP configuration. + * + * @param[out] cfg Pointer to the flashrom_wp_cfg structure to modify. + * @param[in] start The range's start address. + * @param[in] len The range's length. + */ +void flashrom_wp_set_range(struct flashrom_wp_cfg *cfg, size_t start, size_t len); +/** + * @brief Get the protection range from a WP configuration. + * + * @param[out] start Points to a size_t to write the range start to. + * @param[out] len Points to a size_t to write the range length to. + * @param[in] cfg The WP configuration to get the range from. + */ +void flashrom_wp_get_range(size_t *start, size_t *len, const struct flashrom_wp_cfg *cfg); + +/** + * @brief Read the current WP configuration from a flash chip. + * + * @param[out] cfg Pointer to a struct flashrom_wp_cfg to store the chip's + * configuration in. + * @param[in] flash The flash context used to access the chip. + * @return 0 on success + * >0 on failure + */ +enum flashrom_wp_result flashrom_wp_read_cfg(struct flashrom_wp_cfg *cfg, struct flashrom_flashctx *flash); +/** + * @brief Write a WP configuration to a flash chip. + * + * @param[in] flash The flash context used to access the chip. + * @param[in] cfg The WP configuration to write to the chip. + * @return 0 on success + * >0 on failure + */ +enum flashrom_wp_result flashrom_wp_write_cfg(struct flashrom_flashctx *flash, const struct flashrom_wp_cfg *cfg); + +/** + * @brief Get a list of protection ranges supported by the flash chip. + * + * @param[out] ranges Points to a pointer of type struct flashrom_wp_ranges + * that will be set if available ranges are found. Finding + * available ranges may not always be possible, even if the + * chip's protection range can be read or modified. *ranges + * must be freed using @ref flashrom_wp_ranges_release. + * @param[in] flash The flash context used to access the chip. + * @return 0 on success + * >0 on failure + */ +enum flashrom_wp_result flashrom_wp_get_available_ranges(struct flashrom_wp_ranges **ranges, struct flashrom_flashctx *flash); +/** + * @brief Get a number of protection ranges in a range list. + * + * @param[in] ranges The range list to get the count from. + * @return Number of ranges in the list. + */ +size_t flashrom_wp_ranges_get_count(const struct flashrom_wp_ranges *ranges); +/** + * @brief Get a protection range from a range list. + * + * @param[out] start Points to a size_t to write the range's start to. + * @param[out] len Points to a size_t to write the range's length to. + * @param[in] ranges The range list to get the range from. + * @param[in] index Index of the range to get. + * @return 0 on success + * >0 on failure + */ +enum flashrom_wp_result flashrom_wp_ranges_get_range(size_t *start, size_t *len, const struct flashrom_wp_ranges *ranges, unsigned int index); +/** + * @brief Free a WP range list. + * + * @param[out] ranges Pointer to the flashrom_wp_ranges to free. + */ +void flashrom_wp_ranges_release(struct flashrom_wp_ranges *ranges); + +/** @} */ /* end flashrom-wp */ + +#endif /* !__LIBFLASHROM_H__ */ |