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34 #ifndef VCHI_COMMON_H_
35 #define VCHI_COMMON_H_
37 //flags used when sending messages (must be bitmapped)
39 VCHI_FLAGS_NONE = 0x0,
40 VCHI_FLAGS_BLOCK_UNTIL_OP_COMPLETE = 0x1, // waits for message to be received, or sent (NB. not the same as being seen on other side)
41 VCHI_FLAGS_CALLBACK_WHEN_OP_COMPLETE = 0x2, // run a callback when message sent
42 VCHI_FLAGS_BLOCK_UNTIL_QUEUED = 0x4, // return once the transfer is in a queue ready to go
43 VCHI_FLAGS_ALLOW_PARTIAL = 0x8,
44 VCHI_FLAGS_BLOCK_UNTIL_DATA_READ = 0x10,
45 VCHI_FLAGS_CALLBACK_WHEN_DATA_READ = 0x20,
47 VCHI_FLAGS_ALIGN_SLOT = 0x000080, // internal use only
48 VCHI_FLAGS_BULK_AUX_QUEUED = 0x010000, // internal use only
49 VCHI_FLAGS_BULK_AUX_COMPLETE = 0x020000, // internal use only
50 VCHI_FLAGS_BULK_DATA_QUEUED = 0x040000, // internal use only
51 VCHI_FLAGS_BULK_DATA_COMPLETE = 0x080000, // internal use only
52 VCHI_FLAGS_INTERNAL = 0xFF0000
55 // constants for vchi_crc_control()
57 VCHI_CRC_NOTHING = -1,
58 VCHI_CRC_PER_SERVICE = 0,
59 VCHI_CRC_EVERYTHING = 1,
62 //callback reasons when an event occurs on a service
64 VCHI_CALLBACK_REASON_MIN,
66 //This indicates that there is data available
67 //handle is the msg id that was transmitted with the data
68 // When a message is received and there was no FULL message available previously, send callback
69 // Tasks get kicked by the callback, reset their event and try and read from the fifo until it fails
70 VCHI_CALLBACK_MSG_AVAILABLE,
71 VCHI_CALLBACK_MSG_SENT,
72 VCHI_CALLBACK_MSG_SPACE_AVAILABLE, // XXX not yet implemented
74 // This indicates that a transfer from the other side has completed
75 VCHI_CALLBACK_BULK_RECEIVED,
76 //This indicates that data queued up to be sent has now gone
77 //handle is the msg id that was used when sending the data
78 VCHI_CALLBACK_BULK_SENT,
79 VCHI_CALLBACK_BULK_RX_SPACE_AVAILABLE, // XXX not yet implemented
80 VCHI_CALLBACK_BULK_TX_SPACE_AVAILABLE, // XXX not yet implemented
82 VCHI_CALLBACK_SERVICE_CLOSED,
84 // this side has sent XOFF to peer due to lack of data consumption by service
85 // (suggests the service may need to take some recovery action if it has
86 // been deliberately holding off consuming data)
87 VCHI_CALLBACK_SENT_XOFF,
88 VCHI_CALLBACK_SENT_XON,
90 // indicates that a bulk transfer has finished reading the source buffer
91 VCHI_CALLBACK_BULK_DATA_READ,
93 // power notification events (currently host side only)
94 VCHI_CALLBACK_PEER_OFF,
95 VCHI_CALLBACK_PEER_SUSPENDED,
96 VCHI_CALLBACK_PEER_ON,
97 VCHI_CALLBACK_PEER_RESUMED,
98 VCHI_CALLBACK_FORCED_POWER_OFF,
100 // some extra notifications provided by vchiq_arm
101 VCHI_CALLBACK_SERVICE_OPENED,
102 VCHI_CALLBACK_BULK_RECEIVE_ABORTED,
103 VCHI_CALLBACK_BULK_TRANSMIT_ABORTED,
105 VCHI_CALLBACK_REASON_MAX
106 } VCHI_CALLBACK_REASON_T;
108 // service control options
110 VCHI_SERVICE_OPTION_MIN,
112 VCHI_SERVICE_OPTION_TRACE,
113 VCHI_SERVICE_OPTION_SYNCHRONOUS,
115 VCHI_SERVICE_OPTION_MAX
116 } VCHI_SERVICE_OPTION_T;
118 //Callback used by all services / bulk transfers
119 typedef void (*VCHI_CALLBACK_T)(void *callback_param, //my service local param
120 VCHI_CALLBACK_REASON_T reason,
121 void *handle); //for transmitting msg's only
124 * Define vector struct for scatter-gather (vector) operations
125 * Vectors can be nested - if a vector element has negative length, then
126 * the data pointer is treated as pointing to another vector array, with
127 * '-vec_len' elements. Thus to append a header onto an existing vector,
130 * void foo(const VCHI_MSG_VECTOR_T *v, int n)
132 * VCHI_MSG_VECTOR_T nv[2];
133 * nv[0].vec_base = my_header;
134 * nv[0].vec_len = sizeof my_header;
135 * nv[1].vec_base = v;
136 * nv[1].vec_len = -n;
140 typedef struct vchi_msg_vector {
141 const void *vec_base;
145 // Opaque type for a connection API
146 typedef struct opaque_vchi_connection_api_t VCHI_CONNECTION_API_T;
148 // Opaque type for a message driver
149 typedef struct opaque_vchi_message_driver_t VCHI_MESSAGE_DRIVER_T;
151 // Iterator structure for reading ahead through received message queue. Allocated by client,
152 // initialised by vchi_msg_look_ahead. Fields are for internal VCHI use only.
153 // Iterates over messages in queue at the instant of the call to vchi_msg_lookahead -
154 // will not proceed to messages received since. Behaviour is undefined if an iterator
155 // is used again after messages for that service are removed/dequeued by any
156 // means other than vchi_msg_iter_... calls on the iterator itself.
158 struct opaque_vchi_service_t *service;
164 #endif // VCHI_COMMON_H_