src/mesa/main/glthread.h

   1 /*
   2  * Copyright © 2012 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #ifndef _GLTHREAD_H
  25 #define _GLTHREAD_H
  26
  27 /* The size of one batch and the maximum size of one call.
  28  *
  29  * This should be as low as possible, so that:
  30  * - multiple synchronizations within a frame don't slow us down much
  31  * - a smaller number of calls per frame can still get decent parallelism
  32  * - the memory footprint of the queue is low, and with that comes a lower
  33  *   chance of experiencing CPU cache thrashing
  34  * but it should be high enough so that u_queue overhead remains negligible.
  35  */
  36 #define MARSHAL_MAX_CMD_SIZE (8 * 1024)
  37
  38 /* The number of batch slots in memory.
  39  *
  40  * One batch is being executed, one batch is being filled, the rest are
  41  * waiting batches. There must be at least 1 slot for a waiting batch,
  42  * so the minimum number of batches is 3.
  43  */
  44 #define MARSHAL_MAX_BATCHES 8
  45
  46 #include <inttypes.h>
  47 #include <stdbool.h>
  48 #include "util/u_queue.h"
  49 #include "GL/gl.h"
  50
  51 struct gl_context;
  52 struct _mesa_HashTable;
  53
  54 struct glthread_vao {
  55    GLuint Name;
  56    bool HasUserPointer;
  57    bool IndexBufferIsUserPointer;
  58 };
  59
  60 /** A single batch of commands queued up for execution. */
  61 struct glthread_batch
  62 {
  63    /** Batch fence for waiting for the execution to finish. */
  64    struct util_queue_fence fence;
  65
  66    /** The worker thread will access the context with this. */
  67    struct gl_context *ctx;
  68
  69    /** Amount of data used by batch commands, in bytes. */
  70    int used;
  71
  72    /** Data contained in the command buffer. */
  73 #ifdef _MSC_VER
  74    __declspec(align(8))
  75 #else
  76    __attribute__((aligned(8)))
  77 #endif
  78    uint8_t buffer[MARSHAL_MAX_CMD_SIZE];
  79 };
  80
  81 struct glthread_state
  82 {
  83    /** Multithreaded queue. */
  84    struct util_queue queue;
  85
  86    /** This is sent to the driver for framebuffer overlay / HUD. */
  87    struct util_queue_monitoring stats;
  88
  89    /** Whether GLThread is enabled. */
  90    bool enabled;
  91
  92    /** The ring of batches in memory. */
  93    struct glthread_batch batches[MARSHAL_MAX_BATCHES];
  94
  95    /** Index of the last submitted batch. */
  96    unsigned last;
  97
  98    /** Index of the batch being filled and about to be submitted. */
  99    unsigned next;
 100
 101    /** Vertex Array objects tracked by glthread independently of Mesa. */
 102    struct _mesa_HashTable *VAOs;
 103    struct glthread_vao *CurrentVAO;
 104    struct glthread_vao *LastLookedUpVAO;
 105    struct glthread_vao DefaultVAO;
 106
 107    /**
 108     * Tracks on the main thread side whether the current vertex array binding
 109     * is in a VBO.
 110     */
 111    bool vertex_array_is_vbo;
 112
 113    /**
 114     * Tracks on the main thread side whether the current element array (index
 115     * buffer) binding is in a VBO.
 116     */
 117    bool draw_indirect_buffer_is_vbo;
 118 };
 119
 120 void _mesa_glthread_init(struct gl_context *ctx);
 121 void _mesa_glthread_destroy(struct gl_context *ctx);
 122
 123 void _mesa_glthread_restore_dispatch(struct gl_context *ctx, const char *func);
 124 void _mesa_glthread_disable(struct gl_context *ctx, const char *func);
 125 void _mesa_glthread_flush_batch(struct gl_context *ctx);
 126 void _mesa_glthread_finish(struct gl_context *ctx);
 127 void _mesa_glthread_finish_before(struct gl_context *ctx, const char *func);
 128
 129 void _mesa_glthread_BindVertexArray(struct gl_context *ctx, GLuint id);
 130 void _mesa_glthread_DeleteVertexArrays(struct gl_context *ctx,
 131                                        GLsizei n, const GLuint *ids);
 132 void _mesa_glthread_GenVertexArrays(struct gl_context *ctx,
 133                                     GLsizei n, GLuint *arrays);
 134 void _mesa_glthread_AttribPointer(struct gl_context *ctx);
 135
 136 #endif /* _GLTHREAD_H*/