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34 #ifndef _VCHI_MESSAGE_H_
35 #define _VCHI_MESSAGE_H_
37 #include <linux/kernel.h>
38 #include <linux/types.h>
39 #include <linux/semaphore.h>
41 #include "interface/vchi/vchi_cfg_internal.h"
42 #include "interface/vchi/vchi_common.h"
44 typedef enum message_event_type {
47 MESSAGE_EVENT_MESSAGE,
48 MESSAGE_EVENT_SLOT_COMPLETE,
49 MESSAGE_EVENT_RX_BULK_PAUSED,
50 MESSAGE_EVENT_RX_BULK_COMPLETE,
51 MESSAGE_EVENT_TX_COMPLETE,
52 MESSAGE_EVENT_MSG_DISCARDED
53 } MESSAGE_EVENT_TYPE_T;
55 typedef enum vchi_msg_flags {
56 VCHI_MSG_FLAGS_NONE = 0x0,
57 VCHI_MSG_FLAGS_TERMINATE_DMA = 0x1
60 typedef enum message_tx_channel {
61 MESSAGE_TX_CHANNEL_MESSAGE = 0,
62 MESSAGE_TX_CHANNEL_BULK = 1 // drivers may provide multiple bulk channels, from 1 upwards
63 } MESSAGE_TX_CHANNEL_T;
65 // Macros used for cycling through bulk channels
66 #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)
67 #define MESSAGE_TX_CHANNEL_BULK_NEXT(c) (MESSAGE_TX_CHANNEL_BULK+((c)-MESSAGE_TX_CHANNEL_BULK+1)%VCHI_MAX_BULK_TX_CHANNELS_PER_CONNECTION)
69 typedef enum message_rx_channel {
70 MESSAGE_RX_CHANNEL_MESSAGE = 0,
71 MESSAGE_RX_CHANNEL_BULK = 1 // drivers may provide multiple bulk channels, from 1 upwards
72 } MESSAGE_RX_CHANNEL_T;
74 // Message receive slot information
75 typedef struct rx_msg_slot_info {
77 struct rx_msg_slot_info *next;
78 //struct slot_info *prev;
79 #if !defined VCHI_COARSE_LOCKING
83 uint8_t *addr; // base address of slot
84 uint32_t len; // length of slot in bytes
86 uint32_t write_ptr; // hardware causes this to advance
87 uint32_t read_ptr; // this module does the reading
88 int active; // is this slot in the hardware dma fifo?
89 uint32_t msgs_parsed; // count how many messages are in this slot
90 uint32_t msgs_released; // how many messages have been released
91 void *state; // connection state information
92 uint8_t ref_count[VCHI_MAX_SERVICES_PER_CONNECTION]; // reference count for slots held by services
95 // The message driver no longer needs to know about the fields of RX_BULK_SLOTINFO_T - sort this out.
96 // In particular, it mustn't use addr and len - they're the client buffer, but the message
97 // driver will be tasked with sending the aligned core section.
98 typedef struct rx_bulk_slotinfo_t {
99 struct rx_bulk_slotinfo_t *next;
101 struct semaphore *blocking;
107 // needed for the callback
111 } RX_BULK_SLOTINFO_T;
113 /* ----------------------------------------------------------------------
114 * each connection driver will have a pool of the following struct.
116 * the pool will be managed by vchi_qman_*
117 * this means there will be multiple queues (single linked lists)
118 * a given struct message_info will be on exactly one of these queues
120 * -------------------------------------------------------------------- */
121 typedef struct rx_message_info {
123 struct message_info *next;
124 //struct message_info *prev;
128 RX_MSG_SLOTINFO_T *slot; // points to whichever slot contains this message
129 uint32_t tx_timestamp;
130 uint32_t rx_timestamp;
135 MESSAGE_EVENT_TYPE_T type;
139 void *addr; // address of message
140 uint16_t slot_delta; // whether this message indicated slot delta
141 uint32_t len; // length of message
142 RX_MSG_SLOTINFO_T *slot; // slot this message is in
143 int32_t service; // service id this message is destined for
144 uint32_t tx_timestamp; // timestamp from the header
145 uint32_t rx_timestamp; // timestamp when we parsed it
148 // FIXME: cleanup slot reporting...
149 RX_MSG_SLOTINFO_T *rx_msg;
150 RX_BULK_SLOTINFO_T *rx_bulk;
152 MESSAGE_TX_CHANNEL_T tx_channel;
157 typedef void VCHI_MESSAGE_DRIVER_EVENT_CALLBACK_T( void *state );
160 VCHI_MESSAGE_DRIVER_EVENT_CALLBACK_T *event_callback;
161 } VCHI_MESSAGE_DRIVER_OPEN_T;
163 // handle to this instance of message driver (as returned by ->open)
164 typedef struct opaque_mhandle_t *VCHI_MDRIVER_HANDLE_T;
166 struct opaque_vchi_message_driver_t {
167 VCHI_MDRIVER_HANDLE_T *(*open)( VCHI_MESSAGE_DRIVER_OPEN_T *params, void *state );
168 int32_t (*suspending)( VCHI_MDRIVER_HANDLE_T *handle );
169 int32_t (*resumed)( VCHI_MDRIVER_HANDLE_T *handle );
170 int32_t (*power_control)( VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_TX_CHANNEL_T, int32_t enable );
171 int32_t (*add_msg_rx_slot)( VCHI_MDRIVER_HANDLE_T *handle, RX_MSG_SLOTINFO_T *slot ); // rx message
172 int32_t (*add_bulk_rx)( VCHI_MDRIVER_HANDLE_T *handle, void *data, uint32_t len, RX_BULK_SLOTINFO_T *slot ); // rx data (bulk)
173 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)
174 void (*next_event)( VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_EVENT_T *event ); // get the next event from message_driver
175 int32_t (*enable)( VCHI_MDRIVER_HANDLE_T *handle );
176 int32_t (*form_message)( VCHI_MDRIVER_HANDLE_T *handle, int32_t service_id, VCHI_MSG_VECTOR_T *vector, uint32_t count, void
177 *address, uint32_t length_avail, uint32_t max_total_length, int32_t pad_to_fill, int32_t allow_partial );
179 int32_t (*update_message)( VCHI_MDRIVER_HANDLE_T *handle, void *dest, int16_t *slot_count );
180 int32_t (*buffer_aligned)( VCHI_MDRIVER_HANDLE_T *handle, int tx, int uncached, const void *address, const uint32_t length );
181 void * (*allocate_buffer)( VCHI_MDRIVER_HANDLE_T *handle, uint32_t *length );
182 void (*free_buffer)( VCHI_MDRIVER_HANDLE_T *handle, void *address );
183 int (*rx_slot_size)( VCHI_MDRIVER_HANDLE_T *handle, int msg_size );
184 int (*tx_slot_size)( VCHI_MDRIVER_HANDLE_T *handle, int msg_size );
186 int32_t (*tx_supports_terminate)( const VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_TX_CHANNEL_T channel );
187 uint32_t (*tx_bulk_chunk_size)( const VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_TX_CHANNEL_T channel );
188 int (*tx_alignment)( const VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_TX_CHANNEL_T channel );
189 int (*rx_alignment)( const VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_RX_CHANNEL_T channel );
190 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 );
191 void (*debug)( VCHI_MDRIVER_HANDLE_T *handle );
194 #endif // _VCHI_MESSAGE_H_
196 /****************************** End of file ***********************************/