/** * Copyright (c) 2010-2012 Broadcom. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer, * without modification. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The names of the above-listed copyright holders may not be used * to endorse or promote products derived from this software without * specific prior written permission. * * ALTERNATIVELY, this software may be distributed under the terms of the * GNU General Public License ("GPL") version 2, as published by the Free * Software Foundation. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef VCHI_H_ #define VCHI_H_ #include "interface/vchi/vchi_cfg.h" #include "interface/vchi/vchi_common.h" #include "interface/vchi/connections/connection.h" #include "vchi_mh.h" /****************************************************************************** Global defs *****************************************************************************/ #define VCHI_BULK_ROUND_UP(x) ((((unsigned long)(x))+VCHI_BULK_ALIGN-1) & ~(VCHI_BULK_ALIGN-1)) #define VCHI_BULK_ROUND_DOWN(x) (((unsigned long)(x)) & ~(VCHI_BULK_ALIGN-1)) #define VCHI_BULK_ALIGN_NBYTES(x) (VCHI_BULK_ALIGNED(x) ? 0 : (VCHI_BULK_ALIGN - ((unsigned long)(x) & (VCHI_BULK_ALIGN-1)))) #ifdef USE_VCHIQ_ARM #define VCHI_BULK_ALIGNED(x) 1 #else #define VCHI_BULK_ALIGNED(x) (((unsigned long)(x) & (VCHI_BULK_ALIGN-1)) == 0) #endif struct vchi_version { uint32_t version; uint32_t version_min; }; #define VCHI_VERSION(v_) { v_, v_ } #define VCHI_VERSION_EX(v_, m_) { v_, m_ } typedef enum { VCHI_VEC_POINTER, VCHI_VEC_HANDLE, VCHI_VEC_LIST } VCHI_MSG_VECTOR_TYPE_T; typedef struct vchi_msg_vector_ex { VCHI_MSG_VECTOR_TYPE_T type; union { // a memory handle struct { VCHI_MEM_HANDLE_T handle; uint32_t offset; int32_t vec_len; } handle; // an ordinary data pointer struct { const void *vec_base; int32_t vec_len; } ptr; // a nested vector list struct { struct vchi_msg_vector_ex *vec; uint32_t vec_len; } list; } u; } VCHI_MSG_VECTOR_EX_T; // Construct an entry in a msg vector for a pointer (p) of length (l) #define VCHI_VEC_POINTER(p,l) VCHI_VEC_POINTER, { { (VCHI_MEM_HANDLE_T)(p), (l) } } // Construct an entry in a msg vector for a message handle (h), starting at offset (o) of length (l) #define VCHI_VEC_HANDLE(h,o,l) VCHI_VEC_HANDLE, { { (h), (o), (l) } } // Macros to manipulate 'FOURCC' values #define MAKE_FOURCC(x) ((int32_t)( (x[0] << 24) | (x[1] << 16) | (x[2] << 8) | x[3] )) #define FOURCC_TO_CHAR(x) (x >> 24) & 0xFF,(x >> 16) & 0xFF,(x >> 8) & 0xFF, x & 0xFF // Opaque service information struct opaque_vchi_service_t; // Descriptor for a held message. Allocated by client, initialised by vchi_msg_hold, // vchi_msg_iter_hold or vchi_msg_iter_hold_next. Fields are for internal VCHI use only. typedef struct { struct opaque_vchi_service_t *service; void *message; } VCHI_HELD_MSG_T; // structure used to provide the information needed to open a server or a client typedef struct { struct vchi_version version; int32_t service_id; VCHI_CONNECTION_T *connection; uint32_t rx_fifo_size; uint32_t tx_fifo_size; VCHI_CALLBACK_T callback; void *callback_param; /* client intends to receive bulk transfers of odd lengths or into unaligned buffers */ int32_t want_unaligned_bulk_rx; /* client intends to transmit bulk transfers of odd lengths or out of unaligned buffers */ int32_t want_unaligned_bulk_tx; /* client wants to check CRCs on (bulk) xfers. Only needs to be set at 1 end - will do both directions. */ int32_t want_crc; } SERVICE_CREATION_T; // Opaque handle for a VCHI instance typedef struct opaque_vchi_instance_handle_t *VCHI_INSTANCE_T; // Opaque handle for a server or client typedef struct opaque_vchi_service_handle_t *VCHI_SERVICE_HANDLE_T; // Service registration & startup typedef void (*VCHI_SERVICE_INIT)(VCHI_INSTANCE_T initialise_instance, VCHI_CONNECTION_T **connections, uint32_t num_connections); typedef struct service_info_tag { const char * const vll_filename; /* VLL to load to start this service. This is an empty string if VLL is "static" */ VCHI_SERVICE_INIT init; /* Service initialisation function */ void *vll_handle; /* VLL handle; NULL when unloaded or a "static VLL" in build */ } SERVICE_INFO_T; /****************************************************************************** Global funcs - implementation is specific to which side you are on (local / remote) *****************************************************************************/ #ifdef __cplusplus extern "C" { #endif extern /*@observer@*/ VCHI_CONNECTION_T * vchi_create_connection( const VCHI_CONNECTION_API_T * function_table, const VCHI_MESSAGE_DRIVER_T * low_level); // Routine used to initialise the vchi on both local + remote connections extern int32_t vchi_initialise( VCHI_INSTANCE_T *instance_handle ); extern int32_t vchi_exit( void ); extern int32_t vchi_connect( VCHI_CONNECTION_T **connections, const uint32_t num_connections, VCHI_INSTANCE_T instance_handle ); //When this is called, ensure that all services have no data pending. //Bulk transfers can remain 'queued' extern int32_t vchi_disconnect( VCHI_INSTANCE_T instance_handle ); // Global control over bulk CRC checking extern int32_t vchi_crc_control( VCHI_CONNECTION_T *connection, VCHI_CRC_CONTROL_T control ); // helper functions extern void * vchi_allocate_buffer(VCHI_SERVICE_HANDLE_T handle, uint32_t *length); extern void vchi_free_buffer(VCHI_SERVICE_HANDLE_T handle, void *address); extern uint32_t vchi_current_time(VCHI_INSTANCE_T instance_handle); /****************************************************************************** Global service API *****************************************************************************/ // Routine to create a named service extern int32_t vchi_service_create( VCHI_INSTANCE_T instance_handle, SERVICE_CREATION_T *setup, VCHI_SERVICE_HANDLE_T *handle ); // Routine to destory a service extern int32_t vchi_service_destroy( const VCHI_SERVICE_HANDLE_T handle ); // Routine to open a named service extern int32_t vchi_service_open( VCHI_INSTANCE_T instance_handle, SERVICE_CREATION_T *setup, VCHI_SERVICE_HANDLE_T *handle); extern int32_t vchi_get_peer_version( const VCHI_SERVICE_HANDLE_T handle, short *peer_version ); // Routine to close a named service extern int32_t vchi_service_close( const VCHI_SERVICE_HANDLE_T handle ); // Routine to increment ref count on a named service extern int32_t vchi_service_use( const VCHI_SERVICE_HANDLE_T handle ); // Routine to decrement ref count on a named service extern int32_t vchi_service_release( const VCHI_SERVICE_HANDLE_T handle ); // Routine to send a message accross a service extern int32_t vchi_msg_queue( VCHI_SERVICE_HANDLE_T handle, const void *data, uint32_t data_size, VCHI_FLAGS_T flags, void *msg_handle ); // scatter-gather (vector) and send message int32_t vchi_msg_queuev_ex( VCHI_SERVICE_HANDLE_T handle, VCHI_MSG_VECTOR_EX_T *vector, uint32_t count, VCHI_FLAGS_T flags, void *msg_handle ); // legacy scatter-gather (vector) and send message, only handles pointers int32_t vchi_msg_queuev( VCHI_SERVICE_HANDLE_T handle, VCHI_MSG_VECTOR_T *vector, uint32_t count, VCHI_FLAGS_T flags, void *msg_handle ); // Routine to receive a msg from a service // Dequeue is equivalent to hold, copy into client buffer, release extern int32_t vchi_msg_dequeue( VCHI_SERVICE_HANDLE_T handle, void *data, uint32_t max_data_size_to_read, uint32_t *actual_msg_size, VCHI_FLAGS_T flags ); // Routine to look at a message in place. // The message is not dequeued, so a subsequent call to peek or dequeue // will return the same message. extern int32_t vchi_msg_peek( VCHI_SERVICE_HANDLE_T handle, void **data, uint32_t *msg_size, VCHI_FLAGS_T flags ); // Routine to remove a message after it has been read in place with peek // The first message on the queue is dequeued. extern int32_t vchi_msg_remove( VCHI_SERVICE_HANDLE_T handle ); // Routine to look at a message in place. // The message is dequeued, so the caller is left holding it; the descriptor is // filled in and must be released when the user has finished with the message. extern int32_t vchi_msg_hold( VCHI_SERVICE_HANDLE_T handle, void **data, // } may be NULL, as info can be uint32_t *msg_size, // } obtained from HELD_MSG_T VCHI_FLAGS_T flags, VCHI_HELD_MSG_T *message_descriptor ); // Initialise an iterator to look through messages in place extern int32_t vchi_msg_look_ahead( VCHI_SERVICE_HANDLE_T handle, VCHI_MSG_ITER_T *iter, VCHI_FLAGS_T flags ); /****************************************************************************** Global service support API - operations on held messages and message iterators *****************************************************************************/ // Routine to get the address of a held message extern void *vchi_held_msg_ptr( const VCHI_HELD_MSG_T *message ); // Routine to get the size of a held message extern int32_t vchi_held_msg_size( const VCHI_HELD_MSG_T *message ); // Routine to get the transmit timestamp as written into the header by the peer extern uint32_t vchi_held_msg_tx_timestamp( const VCHI_HELD_MSG_T *message ); // Routine to get the reception timestamp, written as we parsed the header extern uint32_t vchi_held_msg_rx_timestamp( const VCHI_HELD_MSG_T *message ); // Routine to release a held message after it has been processed extern int32_t vchi_held_msg_release( VCHI_HELD_MSG_T *message ); // Indicates whether the iterator has a next message. extern int32_t vchi_msg_iter_has_next( const VCHI_MSG_ITER_T *iter ); // Return the pointer and length for the next message and advance the iterator. extern int32_t vchi_msg_iter_next( VCHI_MSG_ITER_T *iter, void **data, uint32_t *msg_size ); // Remove the last message returned by vchi_msg_iter_next. // Can only be called once after each call to vchi_msg_iter_next. extern int32_t vchi_msg_iter_remove( VCHI_MSG_ITER_T *iter ); // Hold the last message returned by vchi_msg_iter_next. // Can only be called once after each call to vchi_msg_iter_next. extern int32_t vchi_msg_iter_hold( VCHI_MSG_ITER_T *iter, VCHI_HELD_MSG_T *message ); // Return information for the next message, and hold it, advancing the iterator. extern int32_t vchi_msg_iter_hold_next( VCHI_MSG_ITER_T *iter, void **data, // } may be NULL uint32_t *msg_size, // } VCHI_HELD_MSG_T *message ); /****************************************************************************** Global bulk API *****************************************************************************/ // Routine to prepare interface for a transfer from the other side extern int32_t vchi_bulk_queue_receive( VCHI_SERVICE_HANDLE_T handle, void *data_dst, uint32_t data_size, VCHI_FLAGS_T flags, void *transfer_handle ); // Prepare interface for a transfer from the other side into relocatable memory. int32_t vchi_bulk_queue_receive_reloc( const VCHI_SERVICE_HANDLE_T handle, VCHI_MEM_HANDLE_T h_dst, uint32_t offset, uint32_t data_size, const VCHI_FLAGS_T flags, void * const bulk_handle ); // Routine to queue up data ready for transfer to the other (once they have signalled they are ready) extern int32_t vchi_bulk_queue_transmit( VCHI_SERVICE_HANDLE_T handle, void *data_src, uint32_t data_size, VCHI_FLAGS_T flags, void *transfer_handle ); /****************************************************************************** Configuration plumbing *****************************************************************************/ // function prototypes for the different mid layers (the state info gives the different physical connections) extern const VCHI_CONNECTION_API_T *single_get_func_table( void ); //extern const VCHI_CONNECTION_API_T *local_server_get_func_table( void ); //extern const VCHI_CONNECTION_API_T *local_client_get_func_table( void ); // declare all message drivers here const VCHI_MESSAGE_DRIVER_T *vchi_mphi_message_driver_func_table( void ); #ifdef __cplusplus } #endif extern int32_t vchi_bulk_queue_transmit_reloc( VCHI_SERVICE_HANDLE_T handle, VCHI_MEM_HANDLE_T h_src, uint32_t offset, uint32_t data_size, VCHI_FLAGS_T flags, void *transfer_handle ); #endif /* VCHI_H_ */ /****************************** End of file **********************************/