| /* |
| * Copyright 2017-2021 NXP |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| * |
| */ |
| |
| #ifndef _JR_DRIVER_H_ |
| #define _JR_DRIVER_H_ |
| |
| #include "jr_driver_config.h" |
| |
| /* The maximum size of a SEC descriptor, in WORDs (32 bits). */ |
| #define MAX_DESC_SIZE_WORDS 64 |
| |
| #define CAAM_TIMEOUT 200000 /* ms */ |
| |
| /* Return codes for JR user space driver APIs */ |
| typedef enum sec_return_code_e { |
| SEC_SUCCESS = 0, |
| SEC_INVALID_INPUT_PARAM, |
| SEC_OUT_OF_MEMORY, |
| SEC_DESCRIPTOR_IN_FLIGHT, |
| SEC_LAST_DESCRIPTOR_IN_FLIGHT, |
| SEC_PROCESSING_ERROR, |
| SEC_DESC_PROCESSING_ERROR, |
| SEC_JR_IS_FULL, |
| SEC_DRIVER_RELEASE_IN_PROGRESS, |
| SEC_DRIVER_ALREADY_INITIALIZED, |
| SEC_DRIVER_NOT_INITIALIZED, |
| SEC_JOB_RING_RESET_IN_PROGRESS, |
| SEC_RESET_ENGINE_FAILED, |
| SEC_ENABLE_IRQS_FAILED, |
| SEC_DISABLE_IRQS_FAILED, |
| SEC_RETURN_CODE_MAX_VALUE, |
| } sec_return_code_t; |
| |
| /* STRUCTURES AND OTHER TYPEDEFS */ |
| |
| /* |
| * @brief Function called by JR User Space driver to notify every processed |
| * descriptor. |
| * |
| * Callback provided by the User Application. |
| * Callback is invoked by JR User Space driver for each descriptor processed by |
| * SEC |
| * @param [in] status Status word indicating processing result for |
| * this descriptor. |
| * @param [in] arg Opaque data passed by User Application |
| * It is opaque from JR driver's point of view. |
| * @param [in] job_ring The job ring handle on which the processed |
| * descriptor word was enqueued |
| */ |
| typedef void (*user_callback) (uint32_t *desc, uint32_t status, |
| void *arg, void *job_ring); |
| |
| /* |
| * Structure encompassing a job descriptor which is to be processed |
| * by SEC. User should also initialise this structure with the callback |
| * function pointer which will be called by driver after recieving proccessed |
| * descriptor from SEC. User data is also passed in this data structure which |
| * will be sent as an argument to the user callback function. |
| */ |
| struct job_descriptor { |
| uint32_t desc[MAX_DESC_SIZE_WORDS]; |
| void *arg; |
| user_callback callback; |
| }; |
| |
| /* |
| * @brief Initialize the JR User Space driver. |
| * This function will handle initialization of sec library |
| * along with registering platform specific callbacks, |
| * as well as local data initialization. |
| * Call once during application startup. |
| * @note Global SEC initialization is done in SEC kernel driver. |
| * @note The hardware IDs of the initialized Job Rings are opaque to the UA. |
| * The exact Job Rings used by this library are decided between SEC user |
| * space driver and SEC kernel driver. A static partitioning of Job Rings is |
| * assumed, configured in DTS(device tree specification) file. |
| * @param [in] platform_cb Registering the platform specific |
| * callbacks with driver |
| * @retval ::0 for successful execution |
| * @retval ::-1 failure |
| */ |
| int sec_jr_lib_init(void); |
| |
| /* |
| * @brief Initialize the software and hardware resources tied to a job ring. |
| * @param [in] jr_mode; Model to be used by SEC Driver to receive |
| * notifications from SEC. Can be either |
| * SEC_NOTIFICATION_TYPE_IRQ or |
| * SEC_NOTIFICATION_TYPE_POLL |
| * @param [in] irq_coalescing_timer This value determines the maximum |
| * amount of time after processing a |
| * descriptor before raising an interrupt. |
| * @param [in] irq_coalescing_count This value determines how many |
| * descriptors are completed before |
| * raising an interrupt. |
| * @param [in] reg_base_addr The job ring base address register |
| * @param [in] irq_id The job ring interrupt identification number. |
| * @retval job_ring_handle for successful job ring configuration |
| * @retval NULL on error |
| */ |
| void *init_job_ring(uint8_t jr_mode, |
| uint16_t irq_coalescing_timer, |
| uint8_t irq_coalescing_count, |
| void *reg_base_addr, uint32_t irq_id); |
| |
| /* |
| * @brief Release the resources used by the JR User Space driver. |
| * Reset and release SEC's job rings indicated by the User Application at |
| * init_job_ring() and free any memory allocated internally. |
| * Call once during application tear down. |
| * @note In case there are any descriptors in-flight (descriptors received by |
| * JR driver for processing and for which no response was yet provided to UA), |
| * the descriptors are discarded without any notifications to User Application. |
| * @retval ::0 is returned for a successful execution |
| * @retval ::-1 is returned if JR driver release is in progress |
| */ |
| int sec_release(void); |
| |
| /* |
| * @brief Submit a descriptor for SEC processing. |
| * This function creates a "job" which is meant to instruct SEC HW |
| * to perform the processing on the input buffer. The "job" is enqueued |
| * in the Job Ring associated. The function will return after the "job" |
| * enqueue is finished. The function will not wait for SEC to |
| * start or/and finish the "job" processing. |
| * After the processing is finished the SEC HW writes the processing result |
| * to the provided output buffer. |
| * The Caller must poll JR driver using jr_dequeue() |
| * to receive notifications of the processing completion |
| * status. The notifications are received by caller by means of callback |
| * (see ::user_callback). |
| * @param [in] job_ring_handle The handle of the job ring on which |
| * descriptor is to be enqueued |
| * @param [in] job_descriptor The job descriptor structure of type |
| * struct job_descriptor. This structure |
| * should be filled with job descriptor along |
| * with callback function to be called after |
| * processing of descriptor and some |
| * opaque data passed to be passed to the |
| * callback function |
| * |
| * @retval ::0 is returned for successful execution |
| * @retval ::-1 is returned if there is some enqueue failure |
| */ |
| int enq_jr_desc(void *job_ring_handle, struct job_descriptor *jobdescr); |
| |
| /* |
| * @brief Polls for available descriptors processed by SEC on a specific |
| * Job Ring |
| * This function polls the SEC Job Rings and delivers processed descriptors |
| * Each processed descriptor has a user_callback registered. |
| * This user_callback is invoked for each processed descriptor. |
| * The polling is stopped when "limit" descriptors are notified or when |
| * there are no more descriptors to notify. |
| * @note The dequeue_jr() API cannot be called from within a user_callback |
| * function |
| * @param [in] job_ring_handle The Job Ring handle. |
| * @param [in] limit This value represents the maximum number |
| * of processed descriptors that can be |
| * notified API call on this Job Ring. |
| * Note that fewer descriptors may be notified |
| * if enough processed descriptors are not |
| * available. |
| * If limit has a negative value, then all |
| * ready descriptors will be notified. |
| * |
| * @retval :: >=0 is returned where retval is the total |
| * Number of descriptors notified |
| * during this function call. |
| * @retval :: -1 is returned in case of some error |
| */ |
| int dequeue_jr(void *job_ring_handle, int32_t limit); |
| |
| #endif /* _JR_DRIVER_H_ */ |