| /** |
| * 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 CONNECTION_H_ |
| #define CONNECTION_H_ |
| |
| #include <linux/kernel.h> |
| #include <linux/types.h> |
| #include <linux/semaphore.h> |
| |
| #include "interface/vchi/vchi_cfg_internal.h" |
| #include "interface/vchi/vchi_common.h" |
| #include "interface/vchi/message_drivers/message.h" |
| |
| /****************************************************************************** |
| Global defs |
| *****************************************************************************/ |
| |
| // Opaque handle for a connection / service pair |
| typedef struct opaque_vchi_connection_connected_service_handle_t *VCHI_CONNECTION_SERVICE_HANDLE_T; |
| |
| // opaque handle to the connection state information |
| typedef struct opaque_vchi_connection_info_t VCHI_CONNECTION_STATE_T; |
| |
| typedef struct vchi_connection_t VCHI_CONNECTION_T; |
| |
| |
| /****************************************************************************** |
| API |
| *****************************************************************************/ |
| |
| // Routine to init a connection with a particular low level driver |
| typedef VCHI_CONNECTION_STATE_T * (*VCHI_CONNECTION_INIT_T)( struct vchi_connection_t * connection, |
| const VCHI_MESSAGE_DRIVER_T * driver ); |
| |
| // Routine to control CRC enabling at a connection level |
| typedef int32_t (*VCHI_CONNECTION_CRC_CONTROL_T)( VCHI_CONNECTION_STATE_T *state_handle, |
| VCHI_CRC_CONTROL_T control ); |
| |
| // Routine to create a service |
| typedef int32_t (*VCHI_CONNECTION_SERVICE_CONNECT_T)( VCHI_CONNECTION_STATE_T *state_handle, |
| int32_t service_id, |
| uint32_t rx_fifo_size, |
| uint32_t tx_fifo_size, |
| int server, |
| VCHI_CALLBACK_T callback, |
| void *callback_param, |
| int32_t want_crc, |
| int32_t want_unaligned_bulk_rx, |
| int32_t want_unaligned_bulk_tx, |
| VCHI_CONNECTION_SERVICE_HANDLE_T *service_handle ); |
| |
| // Routine to close a service |
| typedef int32_t (*VCHI_CONNECTION_SERVICE_DISCONNECT_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle ); |
| |
| // Routine to queue a message |
| typedef int32_t (*VCHI_CONNECTION_SERVICE_QUEUE_MESSAGE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle, |
| const void *data, |
| uint32_t data_size, |
| VCHI_FLAGS_T flags, |
| void *msg_handle ); |
| |
| // scatter-gather (vector) message queueing |
| typedef int32_t (*VCHI_CONNECTION_SERVICE_QUEUE_MESSAGEV_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle, |
| VCHI_MSG_VECTOR_T *vector, |
| uint32_t count, |
| VCHI_FLAGS_T flags, |
| void *msg_handle ); |
| |
| // Routine to dequeue a message |
| typedef int32_t (*VCHI_CONNECTION_SERVICE_DEQUEUE_MESSAGE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle, |
| void *data, |
| uint32_t max_data_size_to_read, |
| uint32_t *actual_msg_size, |
| VCHI_FLAGS_T flags ); |
| |
| // Routine to peek at a message |
| typedef int32_t (*VCHI_CONNECTION_SERVICE_PEEK_MESSAGE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle, |
| void **data, |
| uint32_t *msg_size, |
| VCHI_FLAGS_T flags ); |
| |
| // Routine to hold a message |
| typedef int32_t (*VCHI_CONNECTION_SERVICE_HOLD_MESSAGE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle, |
| void **data, |
| uint32_t *msg_size, |
| VCHI_FLAGS_T flags, |
| void **message_handle ); |
| |
| // Routine to initialise a received message iterator |
| typedef int32_t (*VCHI_CONNECTION_SERVICE_LOOKAHEAD_MESSAGE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle, |
| VCHI_MSG_ITER_T *iter, |
| VCHI_FLAGS_T flags ); |
| |
| // Routine to release a held message |
| typedef int32_t (*VCHI_CONNECTION_HELD_MSG_RELEASE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle, |
| void *message_handle ); |
| |
| // Routine to get info on a held message |
| typedef int32_t (*VCHI_CONNECTION_HELD_MSG_INFO_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle, |
| void *message_handle, |
| void **data, |
| int32_t *msg_size, |
| uint32_t *tx_timestamp, |
| uint32_t *rx_timestamp ); |
| |
| // Routine to check whether the iterator has a next message |
| typedef int32_t (*VCHI_CONNECTION_MSG_ITER_HAS_NEXT_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service, |
| const VCHI_MSG_ITER_T *iter ); |
| |
| // Routine to advance the iterator |
| typedef int32_t (*VCHI_CONNECTION_MSG_ITER_NEXT_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service, |
| VCHI_MSG_ITER_T *iter, |
| void **data, |
| uint32_t *msg_size ); |
| |
| // Routine to remove the last message returned by the iterator |
| typedef int32_t (*VCHI_CONNECTION_MSG_ITER_REMOVE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service, |
| VCHI_MSG_ITER_T *iter ); |
| |
| // Routine to hold the last message returned by the iterator |
| typedef int32_t (*VCHI_CONNECTION_MSG_ITER_HOLD_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service, |
| VCHI_MSG_ITER_T *iter, |
| void **msg_handle ); |
| |
| // Routine to transmit bulk data |
| typedef int32_t (*VCHI_CONNECTION_BULK_QUEUE_TRANSMIT_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle, |
| const void *data_src, |
| uint32_t data_size, |
| VCHI_FLAGS_T flags, |
| void *bulk_handle ); |
| |
| // Routine to receive data |
| typedef int32_t (*VCHI_CONNECTION_BULK_QUEUE_RECEIVE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle, |
| void *data_dst, |
| uint32_t data_size, |
| VCHI_FLAGS_T flags, |
| void *bulk_handle ); |
| |
| // Routine to report if a server is available |
| typedef int32_t (*VCHI_CONNECTION_SERVER_PRESENT)( VCHI_CONNECTION_STATE_T *state, int32_t service_id, int32_t peer_flags ); |
| |
| // Routine to report the number of RX slots available |
| typedef int (*VCHI_CONNECTION_RX_SLOTS_AVAILABLE)( const VCHI_CONNECTION_STATE_T *state ); |
| |
| // Routine to report the RX slot size |
| typedef uint32_t (*VCHI_CONNECTION_RX_SLOT_SIZE)( const VCHI_CONNECTION_STATE_T *state ); |
| |
| // Callback to indicate that the other side has added a buffer to the rx bulk DMA FIFO |
| typedef void (*VCHI_CONNECTION_RX_BULK_BUFFER_ADDED)(VCHI_CONNECTION_STATE_T *state, |
| int32_t service, |
| uint32_t length, |
| MESSAGE_TX_CHANNEL_T channel, |
| uint32_t channel_params, |
| uint32_t data_length, |
| uint32_t data_offset); |
| |
| // Callback to inform a service that a Xon or Xoff message has been received |
| typedef void (*VCHI_CONNECTION_FLOW_CONTROL)(VCHI_CONNECTION_STATE_T *state, int32_t service_id, int32_t xoff); |
| |
| // Callback to inform a service that a server available reply message has been received |
| typedef void (*VCHI_CONNECTION_SERVER_AVAILABLE_REPLY)(VCHI_CONNECTION_STATE_T *state, int32_t service_id, uint32_t flags); |
| |
| // Callback to indicate that bulk auxiliary messages have arrived |
| typedef void (*VCHI_CONNECTION_BULK_AUX_RECEIVED)(VCHI_CONNECTION_STATE_T *state); |
| |
| // Callback to indicate that bulk auxiliary messages have arrived |
| typedef void (*VCHI_CONNECTION_BULK_AUX_TRANSMITTED)(VCHI_CONNECTION_STATE_T *state, void *handle); |
| |
| // Callback with all the connection info you require |
| typedef void (*VCHI_CONNECTION_INFO)(VCHI_CONNECTION_STATE_T *state, uint32_t protocol_version, uint32_t slot_size, uint32_t num_slots, uint32_t min_bulk_size); |
| |
| // Callback to inform of a disconnect |
| typedef void (*VCHI_CONNECTION_DISCONNECT)(VCHI_CONNECTION_STATE_T *state, uint32_t flags); |
| |
| // Callback to inform of a power control request |
| typedef void (*VCHI_CONNECTION_POWER_CONTROL)(VCHI_CONNECTION_STATE_T *state, MESSAGE_TX_CHANNEL_T channel, int32_t enable); |
| |
| // allocate memory suitably aligned for this connection |
| typedef void * (*VCHI_BUFFER_ALLOCATE)(VCHI_CONNECTION_SERVICE_HANDLE_T service_handle, uint32_t * length); |
| |
| // free memory allocated by buffer_allocate |
| typedef void (*VCHI_BUFFER_FREE)(VCHI_CONNECTION_SERVICE_HANDLE_T service_handle, void * address); |
| |
| |
| /****************************************************************************** |
| System driver struct |
| *****************************************************************************/ |
| |
| struct opaque_vchi_connection_api_t { |
| // Routine to init the connection |
| VCHI_CONNECTION_INIT_T init; |
| |
| // Connection-level CRC control |
| VCHI_CONNECTION_CRC_CONTROL_T crc_control; |
| |
| // Routine to connect to or create service |
| VCHI_CONNECTION_SERVICE_CONNECT_T service_connect; |
| |
| // Routine to disconnect from a service |
| VCHI_CONNECTION_SERVICE_DISCONNECT_T service_disconnect; |
| |
| // Routine to queue a message |
| VCHI_CONNECTION_SERVICE_QUEUE_MESSAGE_T service_queue_msg; |
| |
| // scatter-gather (vector) message queue |
| VCHI_CONNECTION_SERVICE_QUEUE_MESSAGEV_T service_queue_msgv; |
| |
| // Routine to dequeue a message |
| VCHI_CONNECTION_SERVICE_DEQUEUE_MESSAGE_T service_dequeue_msg; |
| |
| // Routine to peek at a message |
| VCHI_CONNECTION_SERVICE_PEEK_MESSAGE_T service_peek_msg; |
| |
| // Routine to hold a message |
| VCHI_CONNECTION_SERVICE_HOLD_MESSAGE_T service_hold_msg; |
| |
| // Routine to initialise a received message iterator |
| VCHI_CONNECTION_SERVICE_LOOKAHEAD_MESSAGE_T service_look_ahead_msg; |
| |
| // Routine to release a message |
| VCHI_CONNECTION_HELD_MSG_RELEASE_T held_msg_release; |
| |
| // Routine to get information on a held message |
| VCHI_CONNECTION_HELD_MSG_INFO_T held_msg_info; |
| |
| // Routine to check for next message on iterator |
| VCHI_CONNECTION_MSG_ITER_HAS_NEXT_T msg_iter_has_next; |
| |
| // Routine to get next message on iterator |
| VCHI_CONNECTION_MSG_ITER_NEXT_T msg_iter_next; |
| |
| // Routine to remove the last message returned by iterator |
| VCHI_CONNECTION_MSG_ITER_REMOVE_T msg_iter_remove; |
| |
| // Routine to hold the last message returned by iterator |
| VCHI_CONNECTION_MSG_ITER_HOLD_T msg_iter_hold; |
| |
| // Routine to transmit bulk data |
| VCHI_CONNECTION_BULK_QUEUE_TRANSMIT_T bulk_queue_transmit; |
| |
| // Routine to receive data |
| VCHI_CONNECTION_BULK_QUEUE_RECEIVE_T bulk_queue_receive; |
| |
| // Routine to report the available servers |
| VCHI_CONNECTION_SERVER_PRESENT server_present; |
| |
| // Routine to report the number of RX slots available |
| VCHI_CONNECTION_RX_SLOTS_AVAILABLE connection_rx_slots_available; |
| |
| // Routine to report the RX slot size |
| VCHI_CONNECTION_RX_SLOT_SIZE connection_rx_slot_size; |
| |
| // Callback to indicate that the other side has added a buffer to the rx bulk DMA FIFO |
| VCHI_CONNECTION_RX_BULK_BUFFER_ADDED rx_bulk_buffer_added; |
| |
| // Callback to inform a service that a Xon or Xoff message has been received |
| VCHI_CONNECTION_FLOW_CONTROL flow_control; |
| |
| // Callback to inform a service that a server available reply message has been received |
| VCHI_CONNECTION_SERVER_AVAILABLE_REPLY server_available_reply; |
| |
| // Callback to indicate that bulk auxiliary messages have arrived |
| VCHI_CONNECTION_BULK_AUX_RECEIVED bulk_aux_received; |
| |
| // Callback to indicate that a bulk auxiliary message has been transmitted |
| VCHI_CONNECTION_BULK_AUX_TRANSMITTED bulk_aux_transmitted; |
| |
| // Callback to provide information about the connection |
| VCHI_CONNECTION_INFO connection_info; |
| |
| // Callback to notify that peer has requested disconnect |
| VCHI_CONNECTION_DISCONNECT disconnect; |
| |
| // Callback to notify that peer has requested power change |
| VCHI_CONNECTION_POWER_CONTROL power_control; |
| |
| // allocate memory suitably aligned for this connection |
| VCHI_BUFFER_ALLOCATE buffer_allocate; |
| |
| // free memory allocated by buffer_allocate |
| VCHI_BUFFER_FREE buffer_free; |
| |
| }; |
| |
| struct vchi_connection_t { |
| const VCHI_CONNECTION_API_T *api; |
| VCHI_CONNECTION_STATE_T *state; |
| #ifdef VCHI_COARSE_LOCKING |
| struct semaphore sem; |
| #endif |
| }; |
| |
| |
| #endif /* CONNECTION_H_ */ |
| |
| /****************************** End of file **********************************/ |
