esp-idf/components/esp_partition/include/esp_private/partition_linux.h
radek.tandler e9e388a085 Storage: ESP Partition extended options for the SPI Flash emulation
Various extensions and fixes to improve Linux target SPI Flash emulation. Used by the host tests
2023-03-03 23:57:34 +00:00

246 lines
9.3 KiB
C

/*
* SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#pragma once
#include <stdint.h>
#include <stdbool.h>
#include <limits.h>
#include "esp_err.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @file partition_linux.h
*
* @brief Private API functions used for Linux-target emulation of the Partition APIs (host-side testing)
*/
/** @brief emulated sector size for the partition API on Linux */
#define ESP_PARTITION_EMULATED_SECTOR_SIZE 0x1000
/** @brief emulated whole flash size for the partition API on Linux */
#define ESP_PARTITION_DEFAULT_EMULATED_FLASH_SIZE 0x400000 //4MB fixed
/** @brief mode of fail after */
#define ESP_PARTITION_FAIL_AFTER_MODE_ERASE 0x01
#define ESP_PARTITION_FAIL_AFTER_MODE_WRITE 0x02
#define ESP_PARTITION_FAIL_AFTER_MODE_BOTH 0x03
/**
* @brief Partition type to string conversion routine
*
* @param type Partition type, see esp_partition_type_t
*
* @return string equivalent of given partition type or "unknown" on mismatch
*/
const char *esp_partition_type_to_str(const uint32_t type);
/**
* @brief Partition subtype to string conversion routine
*
* @param type Partition type, see esp_partition_type_t
* @param subtype Partition subtype, see esp_partition_subtype_t
*
* @return string equivalent of given partition subtype or "unknown" on mismatch
*/
const char *esp_partition_subtype_to_str(const uint32_t type, const uint32_t subtype);
/**
* @brief Creates memory emulation of SPI FLASH device (Linux host)
*
* The function creates a memory buffer to emulate SPI FLASH device and provides a pointer to its beginning, in order
* to allow relevant Partition APIs run in host-emulated environment without any code change.
*
* The emulation buffer is actually a disk file mapped to the host memory, current version implements the following:
* 1. create temporary file /tmp/idf-partition-XXXXXX (fixed size 4MB)
* 2. mmap() whole file to the memory and set its contents to all 1s (SPI NOR flash default)
* 3. upload build/partition_table/partition-table.bin (hard-wired path for now) to ESP_PARTITION_TABLE_OFFSET
* (from the beginning of the memory buffer, ie to the same offset as in real SPI FLASH)
* 4. [optional: iterate through the partitions uploaded and print esp_partition_info_t details for each]
* 5. set part_desc_addr_start[out] parameter to the memory buffer starting address
*
* The pointer returned in part_desc_addr_start is then used as it was regular SPI FLASH address.
*
* NOTES:
* 1. the temporary file generated is not deleted automatically - the cleanup happens during the next host system reset
* 2. the mmapped() section remains active until esp_partition_file_unmmap() is called
* 3. mmap() is called with MAP_SHARED so the emulated SPI FLASH can be shared among processes
*
* @param[out] part_desc_addr_start output pointer to receive memory SPI FLASH buffer address
*
* @return
* - ESP_OK: Operation successful
* - ESP_ERR_NOT_FINISHED: Failed to generate temporary file
* - ESP_ERR_INVALID_SIZE (one of the following):
* - Failed to resize temporary file to required value
* - Failed to set filepointer in partition-table.bin
* - ESP_ERR_NO_MEM: Failed to mmap() the temporary file into the memory
* - ESP_ERR_NOT_FOUND: Couldn't open the partition_table.bin file
* - ESP_ERR_INVALID_STATE: Failed to upload partition_table into the memory
*/
esp_err_t esp_partition_file_mmap(const uint8_t **part_desc_addr_start);
/**
* @brief Releases the memory of emulated SPI FLASH device (Linux host)
*
* The function releases the memory block previously allocated by esp_partition_file_mmap().
* The buffer is freed by calling munmap() with emulated_buffer, buffer_size
*
* @return
* - ESP_OK: Operation successful
* - ESP_ERR_NO_MEM: The memory buffer was not allocated
* - ESP_ERR_INVALID_SIZE: The buffer size was 0
* - ESP_ERR_INVALID_RESPONSE: Failed to munmap() the emulation file from memory
*/
esp_err_t esp_partition_file_munmap(void);
/**
* Functions for host tests
*/
/**
* @brief Clears statistics gathered by emulated partition read/write/erase operations
*
*/
void esp_partition_clear_stats(void);
/**
* @brief Returns number of read operations called
*
* Function returns number of calls to the function esp_partition_read
*
* @return
* - number of calls to esp_partition_read since recent esp_partition_clear_stats
*/
size_t esp_partition_get_read_ops(void);
/**
* @brief Returns number of write operations called
*
* Function returns number of calls to the function esp_partition_write
*
* @return
* - number of calls to esp_partition_write since recent esp_partition_clear_stats
*/
size_t esp_partition_get_write_ops(void);
/**
* @brief Returns number of erase operations performed on behalf of calls to esp_partition_erase_range
*
* Function returns accumulated number of sectors erased on behalf of esp_partition_erase_range
*
* @return
* - total number of emulated sector erase operations on behalf of esp_partition_erase_range since recent esp_partition_clear_stats
*/
size_t esp_partition_get_erase_ops(void);
/**
* @brief Returns total number of bytes read on behalf of esp_partition_read
*
* Function returns number of bytes read by esp_partition_read
*
* @return
* - total number of bytes read on behalf of esp_partition_read since recent esp_partition_clear_stats
*/
size_t esp_partition_get_read_bytes(void);
/**
* @brief Returns total number of bytes written on behalf of esp_partition_write
*
* Function returns number of bytes written by esp_partition_write
*
* @return
* - total number of bytes written on behalf of esp_partition_write since recent esp_partition_clear_stats
*/
size_t esp_partition_get_write_bytes(void);
/**
* @brief Returns estimated total time spent on partition operations.
*
* Function returns estimated total time spent in esp_partition_read,
* esp_partition_write and esp_partition_erase_range operations.
*
* @return
* - estimated total time spent in read/write/erase operations in miliseconds
*/
size_t esp_partition_get_total_time(void);
/**
* @brief Initializes emulation of lost power failure in write/erase operations
*
* Function initializes down counter emulating power off failure during write / erase operations.
* Once this counter reaches 0, actual as well as all subsequent write / erase operations fail
* Initial state of down counter is disabled.
*
* @param[in] count Number of remaining write / erase cycles before emulated failure. Call with SIZE_MAX to disable failure emulation.
* @param[in] mode Controls whether remaining cycles are applied to erase, write or both operations
*
*/
void esp_partition_fail_after(size_t count, uint8_t mode);
/**
* @brief Returns count of erase operations performed on virtual emulated sector
*
* Function returns number of erase operations performed on virtual sector specified by the parameter sector.
* The esp_parttion mapped address space is virtually split into sectors of the size ESP_PARTITION_EMULATED_SECTOR_SIZE.
* Calls to the esp_partition_erase_range are impacting one or multiple virtual sectors, for each of them, the respective
* count is incremented.
*
* @param[in] sector Virtual sector number to return erase count for
*
* @return
* - count of erase operations performed on virtual emulated sector
*
*/
size_t esp_partition_get_sector_erase_count(size_t sector);
typedef struct {
char flash_file_name[PATH_MAX]; /*!< name of flash dump file, zero-terminated ASCII string */
size_t flash_file_size; /*!< size of flash dump file in bytes */
char partition_file_name[PATH_MAX]; /*!< name of file containing binary representation of partition table, zero-terminated ASCII string */
bool remove_dump; /*!< flag is set to true if dump file has to be removed after esp_partition_file_munmap */
} esp_partition_file_mmap_ctrl_t;
/**
* @brief Returns pointer to the structure controlling mapping of flash file
*
* Function returns pointer to structure used by esp_partition_file_mmap and esp_partition_file_munmap
* Caller can change this structure members prior calls involving the above functions to
* Specify existing flash file which will represent the content of flash memory after mapping
* Specify size and partition file name used to create empty flash memory
* Control whether the actual flash file will be deleted of kept after call to esp_partition_file_munmap
*
* @return
* - pointer to flash file mapping control structure
*
*/
esp_partition_file_mmap_ctrl_t* esp_partition_get_file_mmap_ctrl_input(void);
/**
* @brief Returns pointer to the structure reflecting actual settings of flash file emulation
*
* Function returns pointer to structure containing:
* flash file name representing emulated flash memory
* size of file representing emulated flash memory
* file name holding binary used to initialize partition table (if it was used)
*
* @return
* - pointer to flash file mapping actuall values in control structure
*
*/
esp_partition_file_mmap_ctrl_t* esp_partition_get_file_mmap_ctrl_act(void);
// private function in partition.c to unload partitions and free space allocated by them
void unload_partitions(void);
#ifdef __cplusplus
}
#endif