root/drivers/staging/vc04_services/bcm2835-camera/mmal-msg.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Broadcom BM2835 V4L2 driver
   4  *
   5  * Copyright © 2013 Raspberry Pi (Trading) Ltd.
   6  *
   7  * Authors: Vincent Sanders @ Collabora
   8  *          Dave Stevenson @ Broadcom
   9  *              (now dave.stevenson@raspberrypi.org)
  10  *          Simon Mellor @ Broadcom
  11  *          Luke Diamand @ Broadcom
  12  */
  13 
  14 /*
  15  * all the data structures which serialise the MMAL protocol. note
  16  * these are directly mapped onto the recived message data.
  17  *
  18  * BEWARE: They seem to *assume* pointers are u32 and that there is no
  19  * structure padding!
  20  *
  21  * NOTE: this implementation uses kernel types to ensure sizes. Rather
  22  * than assigning values to enums to force their size the
  23  * implementation uses fixed size types and not the enums (though the
  24  * comments have the actual enum type
  25  */
  26 #ifndef MMAL_MSG_H
  27 #define MMAL_MSG_H
  28 
  29 #define VC_MMAL_VER 15
  30 #define VC_MMAL_MIN_VER 10
  31 #define VC_MMAL_SERVER_NAME  MAKE_FOURCC("mmal")
  32 
  33 /* max total message size is 512 bytes */
  34 #define MMAL_MSG_MAX_SIZE 512
  35 /* with six 32bit header elements max payload is therefore 488 bytes */
  36 #define MMAL_MSG_MAX_PAYLOAD 488
  37 
  38 #include "mmal-msg-common.h"
  39 #include "mmal-msg-format.h"
  40 #include "mmal-msg-port.h"
  41 
  42 enum mmal_msg_type {
  43         MMAL_MSG_TYPE_QUIT = 1,
  44         MMAL_MSG_TYPE_SERVICE_CLOSED,
  45         MMAL_MSG_TYPE_GET_VERSION,
  46         MMAL_MSG_TYPE_COMPONENT_CREATE,
  47         MMAL_MSG_TYPE_COMPONENT_DESTROY,        /* 5 */
  48         MMAL_MSG_TYPE_COMPONENT_ENABLE,
  49         MMAL_MSG_TYPE_COMPONENT_DISABLE,
  50         MMAL_MSG_TYPE_PORT_INFO_GET,
  51         MMAL_MSG_TYPE_PORT_INFO_SET,
  52         MMAL_MSG_TYPE_PORT_ACTION,              /* 10 */
  53         MMAL_MSG_TYPE_BUFFER_FROM_HOST,
  54         MMAL_MSG_TYPE_BUFFER_TO_HOST,
  55         MMAL_MSG_TYPE_GET_STATS,
  56         MMAL_MSG_TYPE_PORT_PARAMETER_SET,
  57         MMAL_MSG_TYPE_PORT_PARAMETER_GET,       /* 15 */
  58         MMAL_MSG_TYPE_EVENT_TO_HOST,
  59         MMAL_MSG_TYPE_GET_CORE_STATS_FOR_PORT,
  60         MMAL_MSG_TYPE_OPAQUE_ALLOCATOR,
  61         MMAL_MSG_TYPE_CONSUME_MEM,
  62         MMAL_MSG_TYPE_LMK,                      /* 20 */
  63         MMAL_MSG_TYPE_OPAQUE_ALLOCATOR_DESC,
  64         MMAL_MSG_TYPE_DRM_GET_LHS32,
  65         MMAL_MSG_TYPE_DRM_GET_TIME,
  66         MMAL_MSG_TYPE_BUFFER_FROM_HOST_ZEROLEN,
  67         MMAL_MSG_TYPE_PORT_FLUSH,               /* 25 */
  68         MMAL_MSG_TYPE_HOST_LOG,
  69         MMAL_MSG_TYPE_MSG_LAST
  70 };
  71 
  72 /* port action request messages differ depending on the action type */
  73 enum mmal_msg_port_action_type {
  74         MMAL_MSG_PORT_ACTION_TYPE_UNKNOWN = 0,  /* Unknown action */
  75         MMAL_MSG_PORT_ACTION_TYPE_ENABLE,       /* Enable a port */
  76         MMAL_MSG_PORT_ACTION_TYPE_DISABLE,      /* Disable a port */
  77         MMAL_MSG_PORT_ACTION_TYPE_FLUSH,        /* Flush a port */
  78         MMAL_MSG_PORT_ACTION_TYPE_CONNECT,      /* Connect ports */
  79         MMAL_MSG_PORT_ACTION_TYPE_DISCONNECT,   /* Disconnect ports */
  80         MMAL_MSG_PORT_ACTION_TYPE_SET_REQUIREMENTS, /* Set buffer requirements*/
  81 };
  82 
  83 struct mmal_msg_header {
  84         u32 magic;
  85         u32 type;       /* enum mmal_msg_type */
  86 
  87         /* Opaque handle to the control service */
  88         u32 control_service;
  89 
  90         u32 context;    /* a u32 per message context */
  91         u32 status;     /* The status of the vchiq operation */
  92         u32 padding;
  93 };
  94 
  95 /* Send from VC to host to report version */
  96 struct mmal_msg_version {
  97         u32 flags;
  98         u32 major;
  99         u32 minor;
 100         u32 minimum;
 101 };
 102 
 103 /* request to VC to create component */
 104 struct mmal_msg_component_create {
 105         u32 client_component;   /* component context */
 106         char name[128];
 107         u32 pid;                /* For debug */
 108 };
 109 
 110 /* reply from VC to component creation request */
 111 struct mmal_msg_component_create_reply {
 112         u32 status;     /* enum mmal_msg_status - how does this differ to
 113                          * the one in the header?
 114                          */
 115         u32 component_handle; /* VideoCore handle for component */
 116         u32 input_num;        /* Number of input ports */
 117         u32 output_num;       /* Number of output ports */
 118         u32 clock_num;        /* Number of clock ports */
 119 };
 120 
 121 /* request to VC to destroy a component */
 122 struct mmal_msg_component_destroy {
 123         u32 component_handle;
 124 };
 125 
 126 struct mmal_msg_component_destroy_reply {
 127         u32 status; /* The component destruction status */
 128 };
 129 
 130 /* request and reply to VC to enable a component */
 131 struct mmal_msg_component_enable {
 132         u32 component_handle;
 133 };
 134 
 135 struct mmal_msg_component_enable_reply {
 136         u32 status; /* The component enable status */
 137 };
 138 
 139 /* request and reply to VC to disable a component */
 140 struct mmal_msg_component_disable {
 141         u32 component_handle;
 142 };
 143 
 144 struct mmal_msg_component_disable_reply {
 145         u32 status; /* The component disable status */
 146 };
 147 
 148 /* request to VC to get port information */
 149 struct mmal_msg_port_info_get {
 150         u32 component_handle;  /* component handle port is associated with */
 151         u32 port_type;         /* enum mmal_msg_port_type */
 152         u32 index;             /* port index to query */
 153 };
 154 
 155 /* reply from VC to get port info request */
 156 struct mmal_msg_port_info_get_reply {
 157         u32 status;             /* enum mmal_msg_status */
 158         u32 component_handle;   /* component handle port is associated with */
 159         u32 port_type;          /* enum mmal_msg_port_type */
 160         u32 port_index;         /* port indexed in query */
 161         s32 found;              /* unused */
 162         u32 port_handle;        /* Handle to use for this port */
 163         struct mmal_port port;
 164         struct mmal_es_format format; /* elementary stream format */
 165         union mmal_es_specific_format es; /* es type specific data */
 166         u8 extradata[MMAL_FORMAT_EXTRADATA_MAX_SIZE]; /* es extra data */
 167 };
 168 
 169 /* request to VC to set port information */
 170 struct mmal_msg_port_info_set {
 171         u32 component_handle;
 172         u32 port_type;          /* enum mmal_msg_port_type */
 173         u32 port_index;         /* port indexed in query */
 174         struct mmal_port port;
 175         struct mmal_es_format format;
 176         union mmal_es_specific_format es;
 177         u8 extradata[MMAL_FORMAT_EXTRADATA_MAX_SIZE];
 178 };
 179 
 180 /* reply from VC to port info set request */
 181 struct mmal_msg_port_info_set_reply {
 182         u32 status;
 183         u32 component_handle;   /* component handle port is associated with */
 184         u32 port_type;          /* enum mmal_msg_port_type */
 185         u32 index;              /* port indexed in query */
 186         s32 found;              /* unused */
 187         u32 port_handle;        /* Handle to use for this port */
 188         struct mmal_port port;
 189         struct mmal_es_format format;
 190         union mmal_es_specific_format es;
 191         u8 extradata[MMAL_FORMAT_EXTRADATA_MAX_SIZE];
 192 };
 193 
 194 /* port action requests that take a mmal_port as a parameter */
 195 struct mmal_msg_port_action_port {
 196         u32 component_handle;
 197         u32 port_handle;
 198         u32 action;             /* enum mmal_msg_port_action_type */
 199         struct mmal_port port;
 200 };
 201 
 202 /* port action requests that take handles as a parameter */
 203 struct mmal_msg_port_action_handle {
 204         u32 component_handle;
 205         u32 port_handle;
 206         u32 action;             /* enum mmal_msg_port_action_type */
 207         u32 connect_component_handle;
 208         u32 connect_port_handle;
 209 };
 210 
 211 struct mmal_msg_port_action_reply {
 212         u32 status;     /* The port action operation status */
 213 };
 214 
 215 /* MMAL buffer transfer */
 216 
 217 /* Size of space reserved in a buffer message for short messages. */
 218 #define MMAL_VC_SHORT_DATA 128
 219 
 220 /* Signals that the current payload is the end of the stream of data */
 221 #define MMAL_BUFFER_HEADER_FLAG_EOS                    BIT(0)
 222 /* Signals that the start of the current payload starts a frame */
 223 #define MMAL_BUFFER_HEADER_FLAG_FRAME_START            BIT(1)
 224 /* Signals that the end of the current payload ends a frame */
 225 #define MMAL_BUFFER_HEADER_FLAG_FRAME_END              BIT(2)
 226 /* Signals that the current payload contains only complete frames (>1) */
 227 #define MMAL_BUFFER_HEADER_FLAG_FRAME                  \
 228         (MMAL_BUFFER_HEADER_FLAG_FRAME_START | \
 229          MMAL_BUFFER_HEADER_FLAG_FRAME_END)
 230 /* Signals that the current payload is a keyframe (i.e. self decodable) */
 231 #define MMAL_BUFFER_HEADER_FLAG_KEYFRAME               BIT(3)
 232 /*
 233  * Signals a discontinuity in the stream of data (e.g. after a seek).
 234  * Can be used for instance by a decoder to reset its state
 235  */
 236 #define MMAL_BUFFER_HEADER_FLAG_DISCONTINUITY          BIT(4)
 237 /*
 238  * Signals a buffer containing some kind of config data for the component
 239  * (e.g. codec config data)
 240  */
 241 #define MMAL_BUFFER_HEADER_FLAG_CONFIG                 BIT(5)
 242 /* Signals an encrypted payload */
 243 #define MMAL_BUFFER_HEADER_FLAG_ENCRYPTED              BIT(6)
 244 /* Signals a buffer containing side information */
 245 #define MMAL_BUFFER_HEADER_FLAG_CODECSIDEINFO          BIT(7)
 246 /*
 247  * Signals a buffer which is the snapshot/postview image from a stills
 248  * capture
 249  */
 250 #define MMAL_BUFFER_HEADER_FLAGS_SNAPSHOT              BIT(8)
 251 /* Signals a buffer which contains data known to be corrupted */
 252 #define MMAL_BUFFER_HEADER_FLAG_CORRUPTED              BIT(9)
 253 /* Signals that a buffer failed to be transmitted */
 254 #define MMAL_BUFFER_HEADER_FLAG_TRANSMISSION_FAILED    BIT(10)
 255 
 256 struct mmal_driver_buffer {
 257         u32 magic;
 258         u32 component_handle;
 259         u32 port_handle;
 260         u32 client_context;
 261 };
 262 
 263 /* buffer header */
 264 struct mmal_buffer_header {
 265         u32 next;       /* next header */
 266         u32 priv;       /* framework private data */
 267         u32 cmd;
 268         u32 data;
 269         u32 alloc_size;
 270         u32 length;
 271         u32 offset;
 272         u32 flags;
 273         s64 pts;
 274         s64 dts;
 275         u32 type;
 276         u32 user_data;
 277 };
 278 
 279 struct mmal_buffer_header_type_specific {
 280         union {
 281                 struct {
 282                 u32 planes;
 283                 u32 offset[4];
 284                 u32 pitch[4];
 285                 u32 flags;
 286                 } video;
 287         } u;
 288 };
 289 
 290 struct mmal_msg_buffer_from_host {
 291         /*
 292          *The front 32 bytes of the buffer header are copied
 293          * back to us in the reply to allow for context. This
 294          * area is used to store two mmal_driver_buffer structures to
 295          * allow for multiple concurrent service users.
 296          */
 297         /* control data */
 298         struct mmal_driver_buffer drvbuf;
 299 
 300         /* referenced control data for passthrough buffer management */
 301         struct mmal_driver_buffer drvbuf_ref;
 302         struct mmal_buffer_header buffer_header; /* buffer header itself */
 303         struct mmal_buffer_header_type_specific buffer_header_type_specific;
 304         s32 is_zero_copy;
 305         s32 has_reference;
 306 
 307         /* allows short data to be xfered in control message */
 308         u32 payload_in_message;
 309         u8 short_data[MMAL_VC_SHORT_DATA];
 310 };
 311 
 312 /* port parameter setting */
 313 
 314 #define MMAL_WORKER_PORT_PARAMETER_SPACE      96
 315 
 316 struct mmal_msg_port_parameter_set {
 317         u32 component_handle;   /* component */
 318         u32 port_handle;        /* port */
 319         u32 id;                 /* Parameter ID  */
 320         u32 size;               /* Parameter size */
 321         u32 value[MMAL_WORKER_PORT_PARAMETER_SPACE];
 322 };
 323 
 324 struct mmal_msg_port_parameter_set_reply {
 325         u32 status;     /* enum mmal_msg_status todo: how does this
 326                          * differ to the one in the header?
 327                          */
 328 };
 329 
 330 /* port parameter getting */
 331 
 332 struct mmal_msg_port_parameter_get {
 333         u32 component_handle;   /* component */
 334         u32 port_handle;        /* port */
 335         u32 id;                 /* Parameter ID  */
 336         u32 size;               /* Parameter size */
 337 };
 338 
 339 struct mmal_msg_port_parameter_get_reply {
 340         u32 status;             /* Status of mmal_port_parameter_get call */
 341         u32 id;                 /* Parameter ID  */
 342         u32 size;               /* Parameter size */
 343         u32 value[MMAL_WORKER_PORT_PARAMETER_SPACE];
 344 };
 345 
 346 /* event messages */
 347 #define MMAL_WORKER_EVENT_SPACE 256
 348 
 349 struct mmal_msg_event_to_host {
 350         u32 client_component;   /* component context */
 351 
 352         u32 port_type;
 353         u32 port_num;
 354 
 355         u32 cmd;
 356         u32 length;
 357         u8 data[MMAL_WORKER_EVENT_SPACE];
 358         u32 delayed_buffer;
 359 };
 360 
 361 /* all mmal messages are serialised through this structure */
 362 struct mmal_msg {
 363         /* header */
 364         struct mmal_msg_header h;
 365         /* payload */
 366         union {
 367                 struct mmal_msg_version version;
 368 
 369                 struct mmal_msg_component_create component_create;
 370                 struct mmal_msg_component_create_reply component_create_reply;
 371 
 372                 struct mmal_msg_component_destroy component_destroy;
 373                 struct mmal_msg_component_destroy_reply component_destroy_reply;
 374 
 375                 struct mmal_msg_component_enable component_enable;
 376                 struct mmal_msg_component_enable_reply component_enable_reply;
 377 
 378                 struct mmal_msg_component_disable component_disable;
 379                 struct mmal_msg_component_disable_reply component_disable_reply;
 380 
 381                 struct mmal_msg_port_info_get port_info_get;
 382                 struct mmal_msg_port_info_get_reply port_info_get_reply;
 383 
 384                 struct mmal_msg_port_info_set port_info_set;
 385                 struct mmal_msg_port_info_set_reply port_info_set_reply;
 386 
 387                 struct mmal_msg_port_action_port port_action_port;
 388                 struct mmal_msg_port_action_handle port_action_handle;
 389                 struct mmal_msg_port_action_reply port_action_reply;
 390 
 391                 struct mmal_msg_buffer_from_host buffer_from_host;
 392 
 393                 struct mmal_msg_port_parameter_set port_parameter_set;
 394                 struct mmal_msg_port_parameter_set_reply
 395                         port_parameter_set_reply;
 396                 struct mmal_msg_port_parameter_get
 397                         port_parameter_get;
 398                 struct mmal_msg_port_parameter_get_reply
 399                         port_parameter_get_reply;
 400 
 401                 struct mmal_msg_event_to_host event_to_host;
 402 
 403                 u8 payload[MMAL_MSG_MAX_PAYLOAD];
 404         } u;
 405 };
 406 #endif