201 lines
8.7 KiB
C
201 lines
8.7 KiB
C
/**
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* Copyright (c) 2010-2012 Broadcom. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The names of the above-listed copyright holders may not be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* ALTERNATIVELY, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2, as published by the Free
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* Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _VCHI_MESSAGE_H_
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#define _VCHI_MESSAGE_H_
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#include "interface/vchi/vchi_cfg_internal.h"
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#include "interface/vchi/vchi_common.h"
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typedef enum message_event_type {
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MESSAGE_EVENT_NONE,
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MESSAGE_EVENT_NOP,
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MESSAGE_EVENT_MESSAGE,
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MESSAGE_EVENT_SLOT_COMPLETE,
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MESSAGE_EVENT_RX_BULK_PAUSED,
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MESSAGE_EVENT_RX_BULK_COMPLETE,
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MESSAGE_EVENT_TX_COMPLETE,
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MESSAGE_EVENT_MSG_DISCARDED
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} MESSAGE_EVENT_TYPE_T;
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typedef enum vchi_msg_flags
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{
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VCHI_MSG_FLAGS_NONE = 0x0,
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VCHI_MSG_FLAGS_TERMINATE_DMA = 0x1
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} VCHI_MSG_FLAGS_T;
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typedef enum message_tx_channel
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{
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MESSAGE_TX_CHANNEL_MESSAGE = 0,
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MESSAGE_TX_CHANNEL_BULK = 1 // drivers may provide multiple bulk channels, from 1 upwards
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} MESSAGE_TX_CHANNEL_T;
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// Macros used for cycling through bulk channels
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#define MESSAGE_TX_CHANNEL_BULK_PREV(c) (MESSAGE_TX_CHANNEL_BULK+((c)-MESSAGE_TX_CHANNEL_BULK+VCHI_MAX_BULK_TX_CHANNELS_PER_CONNECTION-1)%VCHI_MAX_BULK_TX_CHANNELS_PER_CONNECTION)
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#define MESSAGE_TX_CHANNEL_BULK_NEXT(c) (MESSAGE_TX_CHANNEL_BULK+((c)-MESSAGE_TX_CHANNEL_BULK+1)%VCHI_MAX_BULK_TX_CHANNELS_PER_CONNECTION)
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typedef enum message_rx_channel
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{
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MESSAGE_RX_CHANNEL_MESSAGE = 0,
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MESSAGE_RX_CHANNEL_BULK = 1 // drivers may provide multiple bulk channels, from 1 upwards
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} MESSAGE_RX_CHANNEL_T;
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// Message receive slot information
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typedef struct rx_msg_slot_info {
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struct rx_msg_slot_info *next;
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//struct slot_info *prev;
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#if !defined VCHI_COARSE_LOCKING
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struct semaphore sem;
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#endif
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uint8_t *addr; // base address of slot
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uint32_t len; // length of slot in bytes
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uint32_t write_ptr; // hardware causes this to advance
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uint32_t read_ptr; // this module does the reading
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int active; // is this slot in the hardware dma fifo?
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uint32_t msgs_parsed; // count how many messages are in this slot
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uint32_t msgs_released; // how many messages have been released
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void *state; // connection state information
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uint8_t ref_count[VCHI_MAX_SERVICES_PER_CONNECTION]; // reference count for slots held by services
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} RX_MSG_SLOTINFO_T;
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// The message driver no longer needs to know about the fields of RX_BULK_SLOTINFO_T - sort this out.
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// In particular, it mustn't use addr and len - they're the client buffer, but the message
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// driver will be tasked with sending the aligned core section.
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typedef struct rx_bulk_slotinfo_t {
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struct rx_bulk_slotinfo_t *next;
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struct semaphore *blocking;
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// needed by DMA
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void *addr;
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uint32_t len;
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// needed for the callback
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void *service;
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void *handle;
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VCHI_FLAGS_T flags;
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} RX_BULK_SLOTINFO_T;
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/* ----------------------------------------------------------------------
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* each connection driver will have a pool of the following struct.
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*
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* the pool will be managed by vchi_qman_*
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* this means there will be multiple queues (single linked lists)
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* a given struct message_info will be on exactly one of these queues
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* at any one time
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* -------------------------------------------------------------------- */
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typedef struct rx_message_info {
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struct message_info *next;
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//struct message_info *prev;
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uint8_t *addr;
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uint32_t len;
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RX_MSG_SLOTINFO_T *slot; // points to whichever slot contains this message
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uint32_t tx_timestamp;
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uint32_t rx_timestamp;
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} RX_MESSAGE_INFO_T;
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typedef struct {
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MESSAGE_EVENT_TYPE_T type;
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struct {
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// for messages
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void *addr; // address of message
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uint16_t slot_delta; // whether this message indicated slot delta
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uint32_t len; // length of message
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RX_MSG_SLOTINFO_T *slot; // slot this message is in
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int32_t service; // service id this message is destined for
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uint32_t tx_timestamp; // timestamp from the header
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uint32_t rx_timestamp; // timestamp when we parsed it
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} message;
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// FIXME: cleanup slot reporting...
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RX_MSG_SLOTINFO_T *rx_msg;
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RX_BULK_SLOTINFO_T *rx_bulk;
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void *tx_handle;
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MESSAGE_TX_CHANNEL_T tx_channel;
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} MESSAGE_EVENT_T;
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// callbacks
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typedef void VCHI_MESSAGE_DRIVER_EVENT_CALLBACK_T( void *state );
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typedef struct {
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VCHI_MESSAGE_DRIVER_EVENT_CALLBACK_T *event_callback;
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} VCHI_MESSAGE_DRIVER_OPEN_T;
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// handle to this instance of message driver (as returned by ->open)
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typedef struct opaque_mhandle_t *VCHI_MDRIVER_HANDLE_T;
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struct opaque_vchi_message_driver_t {
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VCHI_MDRIVER_HANDLE_T *(*open)( VCHI_MESSAGE_DRIVER_OPEN_T *params, void *state );
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int32_t (*suspending)( VCHI_MDRIVER_HANDLE_T *handle );
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int32_t (*resumed)( VCHI_MDRIVER_HANDLE_T *handle );
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int32_t (*power_control)( VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_TX_CHANNEL_T, int32_t enable );
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int32_t (*add_msg_rx_slot)( VCHI_MDRIVER_HANDLE_T *handle, RX_MSG_SLOTINFO_T *slot ); // rx message
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int32_t (*add_bulk_rx)( VCHI_MDRIVER_HANDLE_T *handle, void *data, uint32_t len, RX_BULK_SLOTINFO_T *slot ); // rx data (bulk)
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int32_t (*send)( VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_TX_CHANNEL_T channel, const void *data, uint32_t len, VCHI_MSG_FLAGS_T flags, void *send_handle ); // tx (message & bulk)
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void (*next_event)( VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_EVENT_T *event ); // get the next event from message_driver
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int32_t (*enable)( VCHI_MDRIVER_HANDLE_T *handle );
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int32_t (*form_message)( VCHI_MDRIVER_HANDLE_T *handle, int32_t service_id, VCHI_MSG_VECTOR_T *vector, uint32_t count, void
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*address, uint32_t length_avail, uint32_t max_total_length, int32_t pad_to_fill, int32_t allow_partial );
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int32_t (*update_message)( VCHI_MDRIVER_HANDLE_T *handle, void *dest, int16_t *slot_count );
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int32_t (*buffer_aligned)( VCHI_MDRIVER_HANDLE_T *handle, int tx, int uncached, const void *address, const uint32_t length );
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void * (*allocate_buffer)( VCHI_MDRIVER_HANDLE_T *handle, uint32_t *length );
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void (*free_buffer)( VCHI_MDRIVER_HANDLE_T *handle, void *address );
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int (*rx_slot_size)( VCHI_MDRIVER_HANDLE_T *handle, int msg_size );
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int (*tx_slot_size)( VCHI_MDRIVER_HANDLE_T *handle, int msg_size );
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int32_t (*tx_supports_terminate)( const VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_TX_CHANNEL_T channel );
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uint32_t (*tx_bulk_chunk_size)( const VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_TX_CHANNEL_T channel );
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int (*tx_alignment)( const VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_TX_CHANNEL_T channel );
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int (*rx_alignment)( const VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_RX_CHANNEL_T channel );
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void (*form_bulk_aux)( VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_TX_CHANNEL_T channel, const void *data, uint32_t len, uint32_t chunk_size, const void **aux_data, int32_t *aux_len );
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void (*debug)( VCHI_MDRIVER_HANDLE_T *handle );
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};
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#endif // _VCHI_MESSAGE_H_
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/****************************** End of file ***********************************/
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