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 #include "compiler/shader_enums.h"
  51
  52 struct gl_context;
  53 struct gl_buffer_object;
  54 struct _mesa_HashTable;
  55
  56 struct glthread_attrib_binding {
  57    struct gl_buffer_object *buffer; /**< where non-VBO data was uploaded */
  58    int offset;                      /**< offset to uploaded non-VBO data */
  59    const void *original_pointer;    /**< restore this pointer after the draw */
  60 };
  61
  62 struct glthread_vao {
  63    GLuint Name;
  64    GLuint CurrentElementBufferName;
  65    GLbitfield Enabled;
  66    GLbitfield UserPointerMask;
  67 };
  68
  69 /** A single batch of commands queued up for execution. */
  70 struct glthread_batch
  71 {
  72    /** Batch fence for waiting for the execution to finish. */
  73    struct util_queue_fence fence;
  74
  75    /** The worker thread will access the context with this. */
  76    struct gl_context *ctx;
  77
  78    /** Amount of data used by batch commands, in bytes. */
  79    int used;
  80
  81    /** Data contained in the command buffer. */
  82 #ifdef _MSC_VER
  83    __declspec(align(8))
  84 #else
  85    __attribute__((aligned(8)))
  86 #endif
  87    uint8_t buffer[MARSHAL_MAX_CMD_SIZE];
  88 };
  89
  90 struct glthread_state
  91 {
  92    /** Multithreaded queue. */
  93    struct util_queue queue;
  94
  95    /** This is sent to the driver for framebuffer overlay / HUD. */
  96    struct util_queue_monitoring stats;
  97
  98    /** Whether GLThread is enabled. */
  99    bool enabled;
 100
 101    /** The ring of batches in memory. */
 102    struct glthread_batch batches[MARSHAL_MAX_BATCHES];
 103
 104    /** Pointer to the batch currently being filled. */
 105    struct glthread_batch *next_batch;
 106
 107    /** Index of the last submitted batch. */
 108    unsigned last;
 109
 110    /** Index of the batch being filled and about to be submitted. */
 111    unsigned next;
 112
 113    /** Upload buffer. */
 114    struct gl_buffer_object *upload_buffer;
 115    uint8_t *upload_ptr;
 116    unsigned upload_offset;
 117    int upload_buffer_private_refcount;
 118
 119    /** Caps. */
 120    GLboolean SupportsBufferUploads;
 121
 122    /** Vertex Array objects tracked by glthread independently of Mesa. */
 123    struct _mesa_HashTable *VAOs;
 124    struct glthread_vao *CurrentVAO;
 125    struct glthread_vao *LastLookedUpVAO;
 126    struct glthread_vao DefaultVAO;
 127    int ClientActiveTexture;
 128
 129    /** Currently-bound buffer object IDs. */
 130    GLuint CurrentArrayBufferName;
 131    GLuint CurrentDrawIndirectBufferName;
 132 };
 133
 134 void _mesa_glthread_init(struct gl_context *ctx);
 135 void _mesa_glthread_destroy(struct gl_context *ctx);
 136
 137 void _mesa_glthread_restore_dispatch(struct gl_context *ctx, const char *func);
 138 void _mesa_glthread_disable(struct gl_context *ctx, const char *func);
 139 void _mesa_glthread_flush_batch(struct gl_context *ctx);
 140 void _mesa_glthread_finish(struct gl_context *ctx);
 141 void _mesa_glthread_finish_before(struct gl_context *ctx, const char *func);
 142 void _mesa_glthread_upload(struct gl_context *ctx, const void *data,
 143                            GLsizeiptr size, unsigned *out_offset,
 144                            struct gl_buffer_object **out_buffer,
 145                            uint8_t **out_ptr);
 146
 147 void _mesa_glthread_BindBuffer(struct gl_context *ctx, GLenum target,
 148                                GLuint buffer);
 149 void _mesa_glthread_DeleteBuffers(struct gl_context *ctx, GLsizei n,
 150                                   const GLuint *buffers);
 151
 152 void _mesa_glthread_BindVertexArray(struct gl_context *ctx, GLuint id);
 153 void _mesa_glthread_DeleteVertexArrays(struct gl_context *ctx,
 154                                        GLsizei n, const GLuint *ids);
 155 void _mesa_glthread_GenVertexArrays(struct gl_context *ctx,
 156                                     GLsizei n, GLuint *arrays);
 157 void _mesa_glthread_ClientState(struct gl_context *ctx, GLuint *vaobj,
 158                                 gl_vert_attrib attrib, bool enable);
 159 void _mesa_glthread_AttribPointer(struct gl_context *ctx,
 160                                   gl_vert_attrib attrib);
 161
 162 #endif /* _GLTHREAD_H*/