diff options
Diffstat (limited to 'os/ex/subsystems/mfs/mfs.h')
-rw-r--r-- | os/ex/subsystems/mfs/mfs.h | 678 |
1 files changed, 339 insertions, 339 deletions
diff --git a/os/ex/subsystems/mfs/mfs.h b/os/ex/subsystems/mfs/mfs.h index ec5719738..89d6b9958 100644 --- a/os/ex/subsystems/mfs/mfs.h +++ b/os/ex/subsystems/mfs/mfs.h @@ -1,339 +1,339 @@ -/* - Managed Flash Storage - Copyright (C) 2016 Giovanni Di Sirio - - This file is part of ChibiOS. - - ChibiOS 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 3 of the License, or - (at your option) any later version. - - ChibiOS 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. - - You should have received a copy of the GNU General Public License - along with this program. If not, see <http://www.gnu.org/licenses/>. -*/ - -/** - * @file mfs.h - * @brief Managed Flash Storage module header. - * - * @{ - */ - -#ifndef MFS_H -#define MFS_H - -#include "hal_flash.h" - -/*===========================================================================*/ -/* Driver constants. */ -/*===========================================================================*/ - -#define MFS_BANK_MAGIC_1 0xEC705ADEU -#define MFS_BANK_MAGIC_2 0xF0339CC5U -#define MFS_HEADER_MAGIC 0x5FAEU - -/*===========================================================================*/ -/* Driver pre-compile time settings. */ -/*===========================================================================*/ - -/** - * @name Configuration options - * @{ - */ -/** - * @brief Record identifiers cache size. - * @details Cache trades RAM for a faster access to stored records. If zero - * then the cache is disabled. - */ -#if !defined(MFS_CFG_ID_CACHE_SIZE) || defined(__DOXIGEN__) -#define MFS_CFG_ID_CACHE_SIZE 16 -#endif - -/** - * @brief Maximum number of repair attempts on partition mount. - */ -#if !defined(MFS_CFG_MAX_REPAIR_ATTEMPTS) || defined(__DOXIGEN__) -#define MFS_CFG_MAX_REPAIR_ATTEMPTS 3 -#endif - -/** - * @brief Verify written data. - */ -#if !defined(MFS_CFG_WRITE_VERIFY) || defined(__DOXIGEN__) -#define MFS_CFG_WRITE_VERIFY TRUE -#endif -/** @} */ - -/*===========================================================================*/ -/* Derived constants and error checks. */ -/*===========================================================================*/ - -#if MFS_CFG_ID_CACHE_SIZE < 0 -#error "invalid MFS_CFG_ID_CACHE_SIZE value" -#endif - -#if (MFS_CFG_MAX_REPAIR_ATTEMPTS < 1) || (MFS_CFG_MAX_REPAIR_ATTEMPTS > 10) -#error "invalid MFS_MAX_REPAIR_ATTEMPTS value" -#endif - -/*===========================================================================*/ -/* Driver data structures and types. */ -/*===========================================================================*/ - -/** - * @brief Type of a flash bank. - */ -typedef enum { - MFS_BANK_0 = 0, - MFS_BANK_1 = 1 -} mfs_bank_t; - -/** - * @brief Type of driver state machine states. - */ -typedef enum { - MFS_UNINIT = 0, - MFS_STOP = 1, - MFS_READY = 2, - MFS_MOUNTED = 3, - MFS_ACTIVE = 4 -} mfs_state_t; - -/** - * @brief Type of an MFS error code. - * @note Errors are negative integers, informative warnings are positive - * integers. - */ -typedef enum { - MFS_NO_ERROR = 0, - MFS_REPAIR_WARNING = 1, - MFS_GC_WARNING = 2, - MFS_ID_NOT_FOUND = -1, - MFS_CRC_ERROR = -2, - MFS_FLASH_FAILURE = -3, - MFS_INTERNAL_ERROR = -4 -} mfs_error_t; - -/** - * @brief Type of a bank state assessment. - */ -typedef enum { - MFS_BANK_ERASED = 0, - MFS_BANK_OK = 1, - MFS_BANK_PARTIAL = 2, - MFS_BANK_GARBAGE = 3 -} mfs_bank_state_t; - -/** - * @brief Type of a bank header. - * @note The header resides in the first 16 bytes of a bank extending - * to the next page boundary. - */ -typedef struct { - /** - * @brief Bank magic 1. - */ - uint32_t magic1; - /** - * @brief Bank magic 2. - */ - uint32_t magic2; - /** - * @brief Usage counter of the bank. - * @details This value is increased each time a bank swap is performed. It - * indicates how much wearing the flash has already endured. - */ - uint32_t counter; - /** - * @brief First data element. - */ - flash_offset_t next; - /** - * @brief Header CRC. - */ - uint16_t crc; -} mfs_bank_header_t; - -/** - * @brief Type of a data block header. - * @details This structure is placed before each written data block. - */ -typedef struct { - /** - * @brief Data header magic. - */ - uint16_t magic; - /** - * @brief Data CRC. - */ - uint16_t crc; - /** - * @brief Data identifier. - */ - uint32_t id; - /** - * @brief Data size for forward scan. - */ - uint32_t size; - /** - * @brief Address of the previous header or zero if none. - */ - flash_offset_t prev_header; -} mfs_data_header_t; - -#if (MFS_CFG_ID_CACHE_SIZE > 0) || defined(__DOXYGEN__) -/** - * @brief Type of an element of the record identifiers cache. - */ -typedef struct mfs_cached_id { - /** - * @brief Pointer to the next element in the list. - */ - struct mfs_cached_id *lru_next; - /** - * @brief Pointer to the previous element in the list. - */ - struct mfs_cached_id *lru_prev; - /** - * @brief Identifier of the cached element. - */ - uint32_t id; - /** - * @brief Data address of the cached element. - */ - flash_offset_t offset; - /** - * @brief Data size of the cached element. - */ - uint32_t size; -} mfs_cached_id_t; - -/** - * @brief Type of an element of the record identifiers cache. - */ -typedef struct mfs_cache_header { - /** - * @brief Pointer to the first element in the list. - */ - struct mfs_cached_id *lru_next; - /** - * @brief Pointer to the last element in the list. - */ - struct mfs_cached_id *lru_prev; -} mfs_cache_header_t; -#endif /* MFS_CFG_ID_CACHE_SIZE > 0 */ - -/** - * @brief Type of a MFS configuration structure. - */ -typedef struct { - /** - * @brief Flash driver associated to this MFS instance. - */ - BaseFlash *flashp; - /** - * @brief Base sector index for bank 0. - */ - flash_sector_t bank0_start; - /** - * #brief Number of sectors for bank 0. - */ - flash_sector_t bank0_sectors; - /** - * @brief Base sector index for bank 1. - */ - flash_sector_t bank1_start; - /** - * #brief Number of sectors for bank 1. - */ - flash_sector_t bank1_sectors; -} MFSConfig; - -/** - * @extends BaseFlash - * - * @brief Type of an MFS instance. - */ -typedef struct { - /** - * @brief Driver state. - */ - mfs_state_t state; - /** - * @brief Current configuration data. - */ - const MFSConfig *config; - /** - * @brief Bank currently in use. - */ - mfs_bank_t current_bank; - /** - * @brief Size in bytes of banks. - */ - uint32_t banks_size; - /** - * @brief Pointer to the next free position in the current bank. - */ - flash_offset_t next_offset; - /** - * @brief Pointer to the last header in the list or zero. - */ - flash_offset_t last_offset; - /** - * @brief Used space in the current bank without considering erased records. - */ - uint32_t used_space; -#if (MFS_CFG_ID_CACHE_SIZE > 0) || defined(__DOXYGEN__) - /** - * @brief Header of the cache LRU list. - */ - mfs_cache_header_t cache_header; - /** - * @brief Array of the cached identifiers. - */ - mfs_cached_id_t cache_buffer[MFS_CFG_ID_CACHE_SIZE]; -#endif /* MFS_CFG_ID_CACHE_SIZE > 0 */ -} MFSDriver; - -/*===========================================================================*/ -/* Driver macros. */ -/*===========================================================================*/ - -/** - * @name Error codes handling macros - * @{ - */ -#define MFS_IS_ERROR(err) ((err) < MFS_NO_ERROR) -#define MFS_IS_WARNING(err) ((err) > MFS_NO_ERROR) -/** @} */ - -/*===========================================================================*/ -/* External declarations. */ -/*===========================================================================*/ - -#ifdef __cplusplus -extern "C" { -#endif - void mfsObjectInit(MFSDriver *devp); - void mfsStart(MFSDriver *devp, const MFSConfig *config); - void mfsStop(MFSDriver *devp); - mfs_error_t mfsMount(MFSDriver *devp); - mfs_error_t mfsUnmount(MFSDriver *devp); - mfs_error_t mfsReadRecord(MFSDriver *devp, uint32_t id, - uint32_t *np, uint8_t *buffer); - mfs_error_t mfsUpdateRecord(MFSDriver *devp, uint32_t id, - uint32_t n, const uint8_t *buffer); - mfs_error_t mfsEraseRecord(MFSDriver *devp, uint32_t id); -#ifdef __cplusplus -} -#endif - -#endif /* MFS_H */ - -/** @} */ - +/*
+ Managed Flash Storage - Copyright (C) 2016 Giovanni Di Sirio
+
+ This file is part of ChibiOS.
+
+ ChibiOS 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 3 of the License, or
+ (at your option) any later version.
+
+ ChibiOS 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.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file mfs.h
+ * @brief Managed Flash Storage module header.
+ *
+ * @{
+ */
+
+#ifndef MFS_H
+#define MFS_H
+
+#include "hal_flash.h"
+
+/*===========================================================================*/
+/* Driver constants. */
+/*===========================================================================*/
+
+#define MFS_BANK_MAGIC_1 0xEC705ADEU
+#define MFS_BANK_MAGIC_2 0xF0339CC5U
+#define MFS_HEADER_MAGIC 0x5FAEU
+
+/*===========================================================================*/
+/* Driver pre-compile time settings. */
+/*===========================================================================*/
+
+/**
+ * @name Configuration options
+ * @{
+ */
+/**
+ * @brief Record identifiers cache size.
+ * @details Cache trades RAM for a faster access to stored records. If zero
+ * then the cache is disabled.
+ */
+#if !defined(MFS_CFG_ID_CACHE_SIZE) || defined(__DOXIGEN__)
+#define MFS_CFG_ID_CACHE_SIZE 16
+#endif
+
+/**
+ * @brief Maximum number of repair attempts on partition mount.
+ */
+#if !defined(MFS_CFG_MAX_REPAIR_ATTEMPTS) || defined(__DOXIGEN__)
+#define MFS_CFG_MAX_REPAIR_ATTEMPTS 3
+#endif
+
+/**
+ * @brief Verify written data.
+ */
+#if !defined(MFS_CFG_WRITE_VERIFY) || defined(__DOXIGEN__)
+#define MFS_CFG_WRITE_VERIFY TRUE
+#endif
+/** @} */
+
+/*===========================================================================*/
+/* Derived constants and error checks. */
+/*===========================================================================*/
+
+#if MFS_CFG_ID_CACHE_SIZE < 0
+#error "invalid MFS_CFG_ID_CACHE_SIZE value"
+#endif
+
+#if (MFS_CFG_MAX_REPAIR_ATTEMPTS < 1) || (MFS_CFG_MAX_REPAIR_ATTEMPTS > 10)
+#error "invalid MFS_MAX_REPAIR_ATTEMPTS value"
+#endif
+
+/*===========================================================================*/
+/* Driver data structures and types. */
+/*===========================================================================*/
+
+/**
+ * @brief Type of a flash bank.
+ */
+typedef enum {
+ MFS_BANK_0 = 0,
+ MFS_BANK_1 = 1
+} mfs_bank_t;
+
+/**
+ * @brief Type of driver state machine states.
+ */
+typedef enum {
+ MFS_UNINIT = 0,
+ MFS_STOP = 1,
+ MFS_READY = 2,
+ MFS_MOUNTED = 3,
+ MFS_ACTIVE = 4
+} mfs_state_t;
+
+/**
+ * @brief Type of an MFS error code.
+ * @note Errors are negative integers, informative warnings are positive
+ * integers.
+ */
+typedef enum {
+ MFS_NO_ERROR = 0,
+ MFS_REPAIR_WARNING = 1,
+ MFS_GC_WARNING = 2,
+ MFS_ID_NOT_FOUND = -1,
+ MFS_CRC_ERROR = -2,
+ MFS_FLASH_FAILURE = -3,
+ MFS_INTERNAL_ERROR = -4
+} mfs_error_t;
+
+/**
+ * @brief Type of a bank state assessment.
+ */
+typedef enum {
+ MFS_BANK_ERASED = 0,
+ MFS_BANK_OK = 1,
+ MFS_BANK_PARTIAL = 2,
+ MFS_BANK_GARBAGE = 3
+} mfs_bank_state_t;
+
+/**
+ * @brief Type of a bank header.
+ * @note The header resides in the first 16 bytes of a bank extending
+ * to the next page boundary.
+ */
+typedef struct {
+ /**
+ * @brief Bank magic 1.
+ */
+ uint32_t magic1;
+ /**
+ * @brief Bank magic 2.
+ */
+ uint32_t magic2;
+ /**
+ * @brief Usage counter of the bank.
+ * @details This value is increased each time a bank swap is performed. It
+ * indicates how much wearing the flash has already endured.
+ */
+ uint32_t counter;
+ /**
+ * @brief First data element.
+ */
+ flash_offset_t next;
+ /**
+ * @brief Header CRC.
+ */
+ uint16_t crc;
+} mfs_bank_header_t;
+
+/**
+ * @brief Type of a data block header.
+ * @details This structure is placed before each written data block.
+ */
+typedef struct {
+ /**
+ * @brief Data header magic.
+ */
+ uint16_t magic;
+ /**
+ * @brief Data CRC.
+ */
+ uint16_t crc;
+ /**
+ * @brief Data identifier.
+ */
+ uint32_t id;
+ /**
+ * @brief Data size for forward scan.
+ */
+ uint32_t size;
+ /**
+ * @brief Address of the previous header or zero if none.
+ */
+ flash_offset_t prev_header;
+} mfs_data_header_t;
+
+#if (MFS_CFG_ID_CACHE_SIZE > 0) || defined(__DOXYGEN__)
+/**
+ * @brief Type of an element of the record identifiers cache.
+ */
+typedef struct mfs_cached_id {
+ /**
+ * @brief Pointer to the next element in the list.
+ */
+ struct mfs_cached_id *lru_next;
+ /**
+ * @brief Pointer to the previous element in the list.
+ */
+ struct mfs_cached_id *lru_prev;
+ /**
+ * @brief Identifier of the cached element.
+ */
+ uint32_t id;
+ /**
+ * @brief Data address of the cached element.
+ */
+ flash_offset_t offset;
+ /**
+ * @brief Data size of the cached element.
+ */
+ uint32_t size;
+} mfs_cached_id_t;
+
+/**
+ * @brief Type of an element of the record identifiers cache.
+ */
+typedef struct mfs_cache_header {
+ /**
+ * @brief Pointer to the first element in the list.
+ */
+ struct mfs_cached_id *lru_next;
+ /**
+ * @brief Pointer to the last element in the list.
+ */
+ struct mfs_cached_id *lru_prev;
+} mfs_cache_header_t;
+#endif /* MFS_CFG_ID_CACHE_SIZE > 0 */
+
+/**
+ * @brief Type of a MFS configuration structure.
+ */
+typedef struct {
+ /**
+ * @brief Flash driver associated to this MFS instance.
+ */
+ BaseFlash *flashp;
+ /**
+ * @brief Base sector index for bank 0.
+ */
+ flash_sector_t bank0_start;
+ /**
+ * #brief Number of sectors for bank 0.
+ */
+ flash_sector_t bank0_sectors;
+ /**
+ * @brief Base sector index for bank 1.
+ */
+ flash_sector_t bank1_start;
+ /**
+ * #brief Number of sectors for bank 1.
+ */
+ flash_sector_t bank1_sectors;
+} MFSConfig;
+
+/**
+ * @extends BaseFlash
+ *
+ * @brief Type of an MFS instance.
+ */
+typedef struct {
+ /**
+ * @brief Driver state.
+ */
+ mfs_state_t state;
+ /**
+ * @brief Current configuration data.
+ */
+ const MFSConfig *config;
+ /**
+ * @brief Bank currently in use.
+ */
+ mfs_bank_t current_bank;
+ /**
+ * @brief Size in bytes of banks.
+ */
+ uint32_t banks_size;
+ /**
+ * @brief Pointer to the next free position in the current bank.
+ */
+ flash_offset_t next_offset;
+ /**
+ * @brief Pointer to the last header in the list or zero.
+ */
+ flash_offset_t last_offset;
+ /**
+ * @brief Used space in the current bank without considering erased records.
+ */
+ uint32_t used_space;
+#if (MFS_CFG_ID_CACHE_SIZE > 0) || defined(__DOXYGEN__)
+ /**
+ * @brief Header of the cache LRU list.
+ */
+ mfs_cache_header_t cache_header;
+ /**
+ * @brief Array of the cached identifiers.
+ */
+ mfs_cached_id_t cache_buffer[MFS_CFG_ID_CACHE_SIZE];
+#endif /* MFS_CFG_ID_CACHE_SIZE > 0 */
+} MFSDriver;
+
+/*===========================================================================*/
+/* Driver macros. */
+/*===========================================================================*/
+
+/**
+ * @name Error codes handling macros
+ * @{
+ */
+#define MFS_IS_ERROR(err) ((err) < MFS_NO_ERROR)
+#define MFS_IS_WARNING(err) ((err) > MFS_NO_ERROR)
+/** @} */
+
+/*===========================================================================*/
+/* External declarations. */
+/*===========================================================================*/
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+ void mfsObjectInit(MFSDriver *devp);
+ void mfsStart(MFSDriver *devp, const MFSConfig *config);
+ void mfsStop(MFSDriver *devp);
+ mfs_error_t mfsMount(MFSDriver *devp);
+ mfs_error_t mfsUnmount(MFSDriver *devp);
+ mfs_error_t mfsReadRecord(MFSDriver *devp, uint32_t id,
+ uint32_t *np, uint8_t *buffer);
+ mfs_error_t mfsUpdateRecord(MFSDriver *devp, uint32_t id,
+ uint32_t n, const uint8_t *buffer);
+ mfs_error_t mfsEraseRecord(MFSDriver *devp, uint32_t id);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MFS_H */
+
+/** @} */
+
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