diff options
Diffstat (limited to 'drivers/mxc/security/rng/include/shw_internals.h')
| -rw-r--r-- | drivers/mxc/security/rng/include/shw_internals.h | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/drivers/mxc/security/rng/include/shw_internals.h b/drivers/mxc/security/rng/include/shw_internals.h new file mode 100644 index 000000000000..1bf3b1a86374 --- /dev/null +++ b/drivers/mxc/security/rng/include/shw_internals.h @@ -0,0 +1,162 @@ +/* + * Copyright (C) 2005-2010 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +#ifndef SHW_INTERNALS_H +#define SHW_INTERNALS_H + +/*! @file shw_internals.h + * + * This file contains definitions which are internal to the SHW driver. + * + * This header file should only ever be included by shw_driver.c + * + * Compile-time flags minimally needed: + * + * @li Some sort of platform flag. + * + */ + +#include "portable_os.h" +#include "shw_driver.h" + +/*! @defgroup shwcompileflags SHW Compile Flags + * + * These are flags which are used to configure the SHW driver at compilation + * time. + * + * The terms 'defined' and 'undefined' refer to whether a @c \#define (or -D on + * a compile command) has defined a given preprocessor symbol. If a given + * symbol is defined, then @c \#ifdef \<symbol\> will succeed. Some symbols + * described below default to not having a definition, i.e. they are undefined. + * + */ + +/*! @addtogroup shwcompileflags */ +/*! @{ */ +#ifndef SHW_MAJOR_NODE +/*! + * This should be configured in a Makefile/compile command line. It is the + * value the driver will use to register itself as a device driver for a + * /dev/node file. Zero means allow (Linux) to assign a value. Any positive + * number will be attempted as the registration value, to allow for + * coordination with the creation/existence of a /dev/fsl_shw (for instance) + * file in the filesystem. + */ +#define SHW_MAJOR_NODE 0 +#endif + +/* Temporarily define compile-time flags to make Doxygen happy and allow them + to get into the documentation. */ +#ifdef DOXYGEN_HACK + +/*! + * Turn on compilation of run-time operational, debug, and error messages. + * + * This flag is undefined by default. + */ +/* REQ-FSLSHW-DEBUG-001 */ +#define SHW_DEBUG +#undef SHW_DEBUG + +/*! @} */ +#endif /* end DOXYGEN_HACK */ + +#ifndef SHW_DRIVER_NAME +/*! @addtogroup shwcompileflags */ +/*! @{ */ +/*! Name the driver will use to register itself to the kernel as the driver for + * the #shw_major_node and interrupt handling. */ +#define SHW_DRIVER_NAME "fsl_shw" +/*! @} */ +#endif +/*#define SHW_DEBUG*/ + +/*! + * Add a user context onto the list of registered users. + * + * Place it at the head of the #user_list queue. + * + * @param ctx A pointer to a user context + * + * @return void + */ +inline static void SHW_ADD_USER(fsl_shw_uco_t * ctx) +{ + os_lock_context_t lock_context; + + os_lock_save_context(shw_queue_lock, lock_context); + ctx->next = user_list; + user_list = ctx; + os_unlock_restore_context(shw_queue_lock, lock_context); + +} + +/*! + * Remove a user context from the list of registered users. + * + * @param ctx A pointer to a user context + * + * @return void + * + */ +inline static void SHW_REMOVE_USER(fsl_shw_uco_t * ctx) +{ + fsl_shw_uco_t *prev_ctx = user_list; + os_lock_context_t lock_context; + + os_lock_save_context(shw_queue_lock, lock_context); + + if (prev_ctx == ctx) { + /* Found at head, so just set new head */ + user_list = ctx->next; + } else { + for (; (prev_ctx != NULL); prev_ctx = prev_ctx->next) { + if (prev_ctx->next == ctx) { + prev_ctx->next = ctx->next; + break; + } + } + } + os_unlock_restore_context(shw_queue_lock, lock_context); +} + +static void shw_user_callback(fsl_shw_uco_t * uco); + +/* internal functions */ +static os_error_code shw_setup_user_driver_interaction(void); +static void shw_cleanup(void); + +static os_error_code init_uco(fsl_shw_uco_t * user_ctx, void *user_mode_uco); +static os_error_code get_capabilities(fsl_shw_uco_t * user_ctx, + void *user_mode_pco_request); +static os_error_code get_results(fsl_shw_uco_t * user_ctx, + void *user_mode_result_req); +static os_error_code get_random(fsl_shw_uco_t * user_ctx, + void *user_mode_get_random_req); +static os_error_code add_entropy(fsl_shw_uco_t * user_ctx, + void *user_mode_add_entropy_req); + +void* wire_user_memory(void* address, uint32_t length, void** page_ctx); +void unwire_user_memory(void** page_ctx); +os_error_code map_user_memory(struct vm_area_struct* vma, + uint32_t physical_addr, uint32_t size); +os_error_code unmap_user_memory(uint32_t user_addr, uint32_t size); + +#if defined(LINUX_VERSION_CODE) + +MODULE_AUTHOR("Freescale Semiconductor"); +MODULE_DESCRIPTION("Device Driver for FSL SHW API"); + +#endif /* LINUX_VERSION_CODE */ + +#endif /* SHW_INTERNALS_H */ |