Diff: nordic/nrf-sdk/app_common/pstorage.h

Revision:

0:eff01767de02

Child:

37:c29c330d942c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nordic/nrf-sdk/app_common/pstorage.h	Wed Mar 26 14:38:17 2014 +0000
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+/* Copyright (c) 2013 Nordic Semiconductor. All Rights Reserved.
+ *
+ * The information contained herein is property of Nordic Semiconductor ASA.
+ * Terms and conditions of usage are described in detail in NORDIC
+ * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
+ *
+ * Licensees are granted free, non-transferable use of the information. NO
+ * WARRANTY of ANY KIND is provided. This heading must NOT be removed from
+ * the file.
+ *
+ */
+
+/**@file
+ *
+ * @defgroup persistent_storage Persistent Storage Interface
+ * @{
+ * @ingroup app_common
+ * @brief Abstracted flash interface.
+ *
+ * @details In order to ensure that the SDK and application be moved to alternate persistent storage
+ *          options other than the default provided with NRF solution, an abstracted interface is provided
+ *          by the module to ensure SDK modules and application can be ported to alternate option with ease.
+ */
+
+#ifndef PSTORAGE_H__
+#define PSTORAGE_H__
+
+#include "nordic_global.h"
+#include "pstorage_platform.h"
+
+
+/**@defgroup ps_opcode Persistent Storage Access Operation Codes
+ * @{
+ * @brief    Persistent Storage Access Operation Codes. These are used to report any error during
+ *           a persistent storage access operation or any general error that may occur in the
+ *           interface.
+ *
+ * @details  Persistent Storage Access Operation Codes used in error notification callback
+ *           registered with the interface to report any error during an persistent storage access
+ *           operation or any general error that may occur in the interface.
+ */
+ #define PSTORAGE_ERROR_OP_CODE    0x01  /**< General Error Code */
+ #define PSTORAGE_STORE_OP_CODE    0x02  /**< Error when Store Operation was requested */
+ #define PSTORAGE_LOAD_OP_CODE     0x03  /**< Error when Load Operation was requested */
+ #define PSTORAGE_CLEAR_OP_CODE    0x04  /**< Error when Clear Operation was requested */
+
+/**@} */
+
+/**@defgroup pstorage_data_types Persistent Memory Interface Data Types
+ * @{
+ * @brief Data Types needed for interfacing with persistent memory.
+ *
+ * @details Data Types needed for interfacing with persistent memory.
+ */
+
+/**@brief Persistent Storage Error Reporting Callback
+ *
+ * @details Persistent Storage Error Reporting Callback that is used by the interface to report
+ *          success or failure of a flash operation. Therefore, for store operation or clear
+ *          operations, that take time, application can know when the procedure was complete.
+ *          For store operation, since no data copy is made, receiving a success or failure
+ *          notification, indicated by the reason parameter of callback is an indication that
+ *          the resident memory could now be reused or freed, as the case may be.
+ *          This callback is not received for load operation.
+ * 
+ * @param handle   Identifies module and block for which callback is received.
+ * @param op_code  Identifies the operation for which the event is notified.
+ * @param result   Identifies the result of flash access operation.
+ *                 NRF_SUCCESS implies, operation succeeded.
+ * @param p_data   Identifies the application data pointer. In case of store operation, this points
+ *                 to the resident source of application memory that application can now free or 
+ *                 reuse. In case of clear, this is NULL as no application pointer is needed for
+ *                 this operation.
+ * @param data_len Length data application had provided for the operation.
+ * 
+ */
+typedef void (*pstorage_ntf_cb_t)(pstorage_handle_t *  p_handle,
+                                  uint8_t              op_code,
+                                  uint32_t             result,
+                                  uint8_t *            p_data,
+                                  uint32_t             data_len);
+
+
+typedef struct ps_module_param
+{
+
+    pstorage_ntf_cb_t      cb;             /**< Callback registered with the module to be notified of any error occurring in persistent memory management */
+    pstorage_size_t        block_size;     /**< Desired block size for persistent memory storage, for example, if a module has a table with 10 entries, each entry is size 64 bytes,
+                                            *   it can request 10 blocks with block size 64 bytes. On the other hand, the module can also request one block of size 640 based on
+                                            *   how it would like to access or alter memory in persistent memory.
+                                            *   First option is preferred when single entries that need to be updated often when having no impact on the other entries.
+                                            *   While second option is preferred when entries of table are not changed on individually but have common point of loading and storing
+                                            *   data.
+                                            */
+    pstorage_size_t        block_count;    /** Number of blocks requested by the module, minimum values is 1. */
+
+} pstorage_module_param_t;
+
+/**@} */
+
+/**@defgroup pstorage_routines Persistent Storage Access Routines
+ * @{
+ * @brief Functions/Interface SDK modules use to persistently store data.
+ *
+ * @details Interface for Application & SDK module to load/store information persistently.
+ *          Note: that while implementation of each of the persistent storage access function
+ *          depends on the system and can specific to system/solution, the signature of the
+ *          interface routines should not be altered.
+ */
+
+/**@brief Module Initialization Routine.
+ *
+ * @details Initializes module. To be called once before any other APIs of the module are used.
+ *
+ * @retval   NRF_SUCCESS on success, otherwise an appropriate error code.
+ */
+uint32_t pstorage_init(void);
+
+
+/**@brief Register with persistent storage interface.
+ *
+ * @param[in]  p_module_param Module registration param.
+ * @param[out] p_block_id Block identifier to identify persistent memory blocks in case registration
+ *             succeeds. Application is expected to use the block ids for subsequent operations on
+ *             requested persistent memory. Maximum registrations permitted is determined by
+ *             configuration parameter PSTORAGE_MAX_APPLICATIONS.
+ *             In case more than one memory blocks are requested, the identifier provided here is
+ *             the base identifier for the first block and to identify subsequent block,
+ *             application shall use \@ref pstorage_block_identifier_get with this base identifier
+ *             and block number. Therefore if 10 blocks of size 64 are requested and application
+ *             wishes to store memory in 6th block, it shall use
+ *             \@ref pstorage_block_identifier_get with based id and provide a block number of 5.
+ *             This way application is only expected to remember the base block identifier.
+ *
+ * @retval     NRF_SUCCESS on success, otherwise an appropriate error code.
+ * @retval     NRF_ERROR_INVALID_STATE is returned is API is called without module initialization.
+ * @retval     NRF_ERROR_NULL if NULL parameter has been passed.
+ * @retval     NRF_ERROR_INVALID_PARAM if invalid parameters are passed to the API.
+ * @retval     NRF_ERROR_NO_MEM in case no more registrations can be supported.
+ */
+uint32_t pstorage_register(pstorage_module_param_t * p_module_param,
+                           pstorage_handle_t*        p_block_id);
+
+
+/**
+ * @brief Function to get block id with reference to base block identifier provided at time of
+ *        registration.
+ *
+ * @details Function to get block id with reference to base block identifier provided at time of
+ *          registration.
+ *          In case more than one memory blocks were requested when registering, the identifier
+ *          provided here is the base identifier for the first block and to identify subsequent
+ *          block, application shall use this routine to get block identifier providing input as
+ *          base identifier and block number. Therefore if 10 blocks of size 64 are requested and
+ *          application wishes to store memory in 6th block, it shall use
+ *          \@ref pstorage_block_identifier_get with based id and provide a block number of 5.
+ *          This way application is only expected to remember the base block identifier.
+ *
+ * @param[in]  p_base_id Base block id received at the time of registration.
+ * @param[in]  block_num Block Number, with first block numbered zero.
+ * @param[out] p_block_id Block identifier for the block number requested in case the API succeeds.
+ *
+ * @retval     NRF_SUCCESS on success, else an error code indicating reason for failure.
+ * @retval     NRF_ERROR_INVALID_STATE is returned is API is called without module initialization.
+ * @retval     NRF_ERROR_NULL if NULL parameter has been passed.
+ * @retval     NRF_ERROR_INVALID_PARAM if invalid parameters are passed to the API.
+ */
+uint32_t pstorage_block_identifier_get(pstorage_handle_t * p_base_id,
+                                       pstorage_size_t     block_num,
+                                       pstorage_handle_t * p_block_id);
+
+
+/**@brief Routine to persistently store data of length 'size' contained in 'p_src' address
+ *        in storage module at 'p_dest' address; Equivalent to Storage Write.
+ *
+ * @param[in]  p_dest Destination address where data is to be stored persistently.
+ * @param[in]  p_src  Source address containing data to be stored. API assumes this to be resident
+ *                    memory and no intermediate copy of data is made by the API.
+ * @param[in]  size   Size of data to be stored expressed in bytes. Should be word aligned.
+ * @param[in]  offset Offset in bytes to be applied when writing to the block.
+ *                    For example, if within a block of 100 bytes, application wishes to
+ *                    write 20 bytes at offset of 12, then this field should be set to 12.
+ *                    Should be word aligned.
+ *
+ * @retval     NRF_SUCCESS on success, otherwise an appropriate error code.
+ * @retval     NRF_ERROR_INVALID_STATE is returned is API is called without module initialization.
+ * @retval     NRF_ERROR_NULL if NULL parameter has been passed.
+ * @retval     NRF_ERROR_INVALID_PARAM if invalid parameters are passed to the API.
+ * @retval     NRF_ERROR_INVALID_ADDR in case data address 'p_src' is not aligned.
+ * @retval     NRF_ERROR_NO_MEM in case request cannot be processed.
+ *
+ * @warning    No copy of the data is made, and hence memory provided for data source to be written
+ *             to flash cannot be freed or reused by the application until this procedure
+ *             is complete. End of this procedure is notified to the application using the
+ *             notification callback registered by the application.
+ */
+uint32_t pstorage_store(pstorage_handle_t * p_dest,
+                        uint8_t *           p_src,
+                        pstorage_size_t     size,
+                        pstorage_size_t     offset);
+
+
+/**@brief Routine to load persistently stored data of length 'size' from 'p_src' address
+ *        to 'p_dest' address; Equivalent to Storage Read.
+ *
+ * @param[in]  p_dest Destination address where persistently stored data is to be loaded.
+ * @param[in]  p_src  Source from where data is to be loaded from persistent memory.
+ * @param[in]  size   Size of data to be loaded from persistent memory expressed in bytes.
+ *                    Should be word aligned.
+ * @param[in]  offset Offset in bytes to be applied when loading from the block.
+ *                    For example, if within a block of 100 bytes, application wishes to
+ *                    load 20 bytes from offset of 12, then this field should be set to 12.
+ *                    Should be word aligned.
+ *
+ *
+ * @retval     NRF_SUCCESS on success, otherwise an appropriate error code.
+ * @retval     NRF_ERROR_INVALID_STATE is returned is API is called without module initialization.
+ * @retval     NRF_ERROR_NULL if NULL parameter has been passed.
+ * @retval     NRF_ERROR_INVALID_PARAM if invalid parameters are passed to the API.
+ * @retval     NRF_ERROR_INVALID_ADDR in case data address 'p_dst' is not aligned.
+ */
+uint32_t pstorage_load(uint8_t *           p_dest,
+                       pstorage_handle_t * p_src,
+                       pstorage_size_t     size,
+                       pstorage_size_t     offset);
+
+
+/**@brief Routine to clear data in persistent memory.
+ *
+ * @param[in]  p_base_id Base block identifier in persistent memory that needs to cleared;
+ *                       Equivalent to an Erase Operation.
+ *
+ * @param[in]  size      Size of data to be cleared from persistent memory expressed in bytes.
+ *                       This is currently unused. And a clear would mean clearing all blocks,
+ *                       however, this parameter is to provision for clearing of certain blocks
+ *                       of memory only and not all if need be.
+ *
+ * @retval     NRF_SUCCESS on success, otherwise an appropriate error code.
+ * @retval     NRF_ERROR_INVALID_STATE is returned is API is called without module initialization.
+ * @retval     NRF_ERROR_NULL if NULL parameter has been passed.
+ * @retval     NRF_ERROR_INVALID_PARAM if invalid parameters are passed to the API.
+ * @retval     NRF_ERROR_NO_MEM in case request cannot be processed.
+ *
+ * @note       Clear operations may take time. This API however, does not block until the clear
+ *             procedure is complete. Application is notified of procedure completion using
+ *             notification callback registered by the application. 'result' parameter of the
+ *             callback suggests if the procedure was successful or not.
+ */
+uint32_t pstorage_clear(pstorage_handle_t * p_base_id, pstorage_size_t size);
+
+#ifdef PSTORAGE_RAW_MODE_ENABLE
+
+/**@brief      Function for registering with persistent storage interface.
+ *
+ * @param[in]  p_module_param Module registration param.
+ * @param[out] p_block_id Block identifier to identify persistent memory blocks in case 
+ *             registration succeeds. Application is expected to use the block ids for subsequent
+ *             operations on requested persistent memory.
+ *             In case more than one memory blocks are requested, the identifier provided here is
+ *             the base identifier for the first block and to identify subsequent block,
+ *             application shall use \@ref pstorage_block_identifier_get with this base identifier
+ *             and block number. Therefore if 10 blocks of size 64 are requested and application
+ *             wishes to store memory in 6th block, it shall use
+ *             \@ref pstorage_block_identifier_get with based id and provide a block number of 5.
+ *             This way application is only expected to remember the base block identifier.
+ *
+ * @retval     NRF_SUCCESS on success, otherwise an appropriate error code.
+ * @retval     NRF_ERROR_INVALID_STATE is returned is API is called without module initialization.
+ * @retval     NRF_ERROR_NULL if NULL parameter has been passed.
+ * @retval     NRF_ERROR_INVALID_PARAM if invalid parameters are passed to the API.
+ * @retval     NRF_ERROR_NO_MEM in case no more registrations can be supported.
+ */
+uint32_t pstorage_raw_register(pstorage_module_param_t * p_module_param,
+                               pstorage_handle_t *       p_block_id);
+
+/**@brief     Raw mode function for persistently storing data of length 'size' contained in 'p_src'
+ *            address in storage module at 'p_dest' address; Equivalent to Storage Write.
+ *
+ * @param[in]  p_dest Destination address where data is to be stored persistently.
+ * @param[in]  p_src  Source address containing data to be stored. API assumes this to be resident
+ *                    memory and no intermediate copy of data is made by the API.
+ * @param[in]  size   Size of data to be stored expressed in bytes. Should be word aligned.
+ * @param[in]  offset Offset in bytes to be applied when writing to the block. 
+ *                    For example, if within a block of 100 bytes, application wishes to
+ *                    write 20 bytes at offset of 12, then this field should be set to 12.
+ *                    Should be word aligned.
+ *
+ * @retval     NRF_SUCCESS on success, otherwise an appropriate error code.
+ * @retval     NRF_ERROR_INVALID_STATE is returned is API is called without module initialization.
+ * @retval     NRF_ERROR_NULL if NULL parameter has been passed.
+ * @retval     NRF_ERROR_INVALID_PARAM if invalid parameters are passed to the API.
+ * @retval     NRF_ERROR_INVALID_ADDR in case data address 'p_src' is not aligned.
+ * @retval     NRF_ERROR_NO_MEM in case request cannot be processed.
+ *
+ * @warning    No copy of the data is made, and hence memory provided for data source to be written
+ *             to flash cannot be freed or reused by the application until this procedure
+ *             is complete. End of this procedure is notified to the application using the
+ *             notification callback registered by the application.
+ */
+uint32_t pstorage_raw_store(pstorage_handle_t * p_dest,
+                            uint8_t *           p_src,
+                            pstorage_size_t     size,
+                            pstorage_size_t     offset);
+
+/**@brief      Function for clearing data in persistent memory in raw mode.
+ *
+ * @param[in]  p_base_id Base block identifier in persistent memory that needs to cleared;
+ *                       Equivalent to an Erase Operation.
+ *
+ * @param[in]  size      Size of data to be cleared from persistent memory expressed in bytes.
+ *                       This is currently unused. And a clear would mean clearing all blocks,
+ *                       however, this parameter is to provision for clearing of certain blocks
+ *                       of memory only and not all if need be.
+ *
+ * @retval     NRF_SUCCESS on success, otherwise an appropriate error code.
+ * @retval     NRF_ERROR_INVALID_STATE is returned is API is called without module initialization.
+ * @retval     NRF_ERROR_NULL if NULL parameter has been passed.
+ * @retval     NRF_ERROR_INVALID_PARAM if invalid parameters are passed to the API.
+ * @retval     NRF_ERROR_NO_MEM in case request cannot be processed.
+ *
+ * @note       Clear operations may take time. This API however, does not block until the clear
+ *             procedure is complete. Application is notified of procedure completion using
+ *             notification callback registered by the application. 'result' parameter of the
+ *             callback suggests if the procedure was successful or not.
+ */
+uint32_t pstorage_raw_clear(pstorage_handle_t * p_dest, pstorage_size_t size);
+
+#endif // PSTORAGE_RAW_MODE_ENABLE
+
+/**@} */
+/**@} */
+
+#endif // PSTORAGE_H__
+