src/mesa/main/marshal.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 /** \file marshal.h
  25  *
  26  * Declarations of functions related to marshalling GL calls from a client
  27  * thread to a server thread.
  28  */
  29
  30 #ifndef MARSHAL_H
  31 #define MARSHAL_H
  32
  33 #include "main/glthread.h"
  34 #include "main/context.h"
  35 #include "main/macros.h"
  36
  37 struct marshal_cmd_base
  38 {
  39    /**
  40     * Type of command.  See enum marshal_dispatch_cmd_id.
  41     */
  42    uint16_t cmd_id;
  43
  44    /**
  45     * Size of command, in multiples of 4 bytes, including cmd_base.
  46     */
  47    uint16_t cmd_size;
  48 };
  49
  50 static inline void *
  51 _mesa_glthread_allocate_command(struct gl_context *ctx,
  52                                 uint16_t cmd_id,
  53                                 size_t size)
  54 {
  55    struct glthread_state *glthread = ctx->GLThread;
  56    struct glthread_batch *next = &glthread->batches[glthread->next];
  57    struct marshal_cmd_base *cmd_base;
  58    const size_t aligned_size = ALIGN(size, 8);
  59
  60    if (unlikely(next->used + size > MARSHAL_MAX_CMD_SIZE)) {
  61       _mesa_glthread_flush_batch(ctx);
  62       next = &glthread->batches[glthread->next];
  63    }
  64
  65    cmd_base = (struct marshal_cmd_base *)&next->buffer[next->used];
  66    next->used += aligned_size;
  67    cmd_base->cmd_id = cmd_id;
  68    cmd_base->cmd_size = aligned_size;
  69    return cmd_base;
  70 }
  71
  72 /**
  73  * Instead of conditionally handling marshaling previously-bound user vertex
  74  * array data in draw calls (deprecated and removed in GL core), we just
  75  * disable threading at the point where the user sets a user vertex array.
  76  */
  77 static inline bool
  78 _mesa_glthread_is_non_vbo_vertex_attrib_pointer(const struct gl_context *ctx)
  79 {
  80    struct glthread_state *glthread = ctx->GLThread;
  81
  82    return ctx->API != API_OPENGL_CORE && !glthread->vertex_array_is_vbo;
  83 }
  84
  85 /**
  86  * Instead of conditionally handling marshaling immediate index data in draw
  87  * calls (deprecated and removed in GL core), we just disable threading.
  88  */
  89 static inline bool
  90 _mesa_glthread_is_non_vbo_draw_elements(const struct gl_context *ctx)
  91 {
  92    struct glthread_state *glthread = ctx->GLThread;
  93
  94    return ctx->API != API_OPENGL_CORE && !glthread->element_array_is_vbo;
  95 }
  96
  97 #define DEBUG_MARSHAL_PRINT_CALLS 0
  98
  99 /**
 100  * This is printed when we have fallen back to a sync. This can happen when
 101  * MARSHAL_MAX_CMD_SIZE is exceeded.
 102  */
 103 static inline void
 104 debug_print_sync_fallback(const char *func)
 105 {
 106 #if DEBUG_MARSHAL_PRINT_CALLS
 107    printf("fallback to sync: %s\n", func);
 108 #endif
 109 }
 110
 111
 112 static inline void
 113 debug_print_sync(const char *func)
 114 {
 115 #if DEBUG_MARSHAL_PRINT_CALLS
 116    printf("sync: %s\n", func);
 117 #endif
 118 }
 119
 120 static inline void
 121 debug_print_marshal(const char *func)
 122 {
 123 #if DEBUG_MARSHAL_PRINT_CALLS
 124    printf("marshal: %s\n", func);
 125 #endif
 126 }
 127
 128 static inline void
 129 debug_print_unmarshal(const char *func)
 130 {
 131 #if DEBUG_MARSHAL_PRINT_CALLS
 132    printf("unmarshal: %s\n", func);
 133 #endif
 134 }
 135
 136 struct _glapi_table *
 137 _mesa_create_marshal_table(const struct gl_context *ctx);
 138
 139 size_t
 140 _mesa_unmarshal_dispatch_cmd(struct gl_context *ctx, const void *cmd);
 141
 142 static inline void
 143 _mesa_post_marshal_hook(struct gl_context *ctx)
 144 {
 145    /* This can be enabled for debugging whether a failure is a synchronization
 146     * problem between the main thread and the worker thread, or a failure in
 147     * how we actually marshal.
 148     */
 149    if (false)
 150       _mesa_glthread_finish(ctx);
 151 }
 152
 153
 154 /**
 155  * Checks whether we're on a compat context for code-generated
 156  * glBindVertexArray().
 157  *
 158  * In order to decide whether a draw call uses only VBOs for vertex and index
 159  * buffers, we track the current vertex and index buffer bindings by
 160  * glBindBuffer().  However, the index buffer binding is stored in the vertex
 161  * array as opposed to the context.  If we were to accurately track whether
 162  * the index buffer was a user pointer ot not, we'd have to track it per
 163  * vertex array, which would mean synchronizing with the client thread and
 164  * looking into the hash table to find the actual vertex array object.  That's
 165  * more tracking than we'd like to do in the main thread, if possible.
 166  *
 167  * Instead, just punt for now and disable threading on apps using vertex
 168  * arrays and compat contexts.  Apps using vertex arrays can probably use a
 169  * core context.
 170  */
 171 static inline bool
 172 _mesa_glthread_is_compat_bind_vertex_array(const struct gl_context *ctx)
 173 {
 174    return ctx->API != API_OPENGL_CORE;
 175 }
 176
 177 struct marshal_cmd_Enable;
 178 struct marshal_cmd_ShaderSource;
 179 struct marshal_cmd_Flush;
 180 struct marshal_cmd_BindBuffer;
 181 struct marshal_cmd_BufferData;
 182 struct marshal_cmd_BufferSubData;
 183 struct marshal_cmd_NamedBufferData;
 184 struct marshal_cmd_NamedBufferSubData;
 185 struct marshal_cmd_ClearBufferfv;
 186
 187 void
 188 _mesa_unmarshal_Enable(struct gl_context *ctx,
 189                        const struct marshal_cmd_Enable *cmd);
 190
 191 void GLAPIENTRY
 192 _mesa_marshal_Enable(GLenum cap);
 193
 194 void GLAPIENTRY
 195 _mesa_marshal_ShaderSource(GLuint shader, GLsizei count,
 196                            const GLchar * const *string, const GLint *length);
 197
 198 void
 199 _mesa_unmarshal_ShaderSource(struct gl_context *ctx,
 200                              const struct marshal_cmd_ShaderSource *cmd);
 201
 202 void GLAPIENTRY
 203 _mesa_marshal_Flush(void);
 204
 205 void
 206 _mesa_unmarshal_Flush(struct gl_context *ctx,
 207                       const struct marshal_cmd_Flush *cmd);
 208
 209 void GLAPIENTRY
 210 _mesa_marshal_BindBuffer(GLenum target, GLuint buffer);
 211
 212 void
 213 _mesa_unmarshal_BindBuffer(struct gl_context *ctx,
 214                            const struct marshal_cmd_BindBuffer *cmd);
 215
 216 void
 217 _mesa_unmarshal_BufferData(struct gl_context *ctx,
 218                            const struct marshal_cmd_BufferData *cmd);
 219
 220 void GLAPIENTRY
 221 _mesa_marshal_BufferData(GLenum target, GLsizeiptr size, const GLvoid * data,
 222                          GLenum usage);
 223
 224 void
 225 _mesa_unmarshal_BufferSubData(struct gl_context *ctx,
 226                               const struct marshal_cmd_BufferSubData *cmd);
 227
 228 void GLAPIENTRY
 229 _mesa_marshal_BufferSubData(GLenum target, GLintptr offset, GLsizeiptr size,
 230                             const GLvoid * data);
 231
 232 void
 233 _mesa_unmarshal_NamedBufferData(struct gl_context *ctx,
 234                                 const struct marshal_cmd_NamedBufferData *cmd);
 235
 236 void GLAPIENTRY
 237 _mesa_marshal_NamedBufferData(GLuint buffer, GLsizeiptr size,
 238                               const GLvoid * data, GLenum usage);
 239
 240 void
 241 _mesa_unmarshal_NamedBufferSubData(struct gl_context *ctx,
 242                                    const struct marshal_cmd_NamedBufferSubData *cmd);
 243
 244 void GLAPIENTRY
 245 _mesa_marshal_NamedBufferSubData(GLuint buffer, GLintptr offset, GLsizeiptr size,
 246                                  const GLvoid * data);
 247
 248 void
 249 _mesa_unmarshal_ClearBufferfv(struct gl_context *ctx,
 250                               const struct marshal_cmd_ClearBufferfv *cmd);
 251
 252 void GLAPIENTRY
 253 _mesa_marshal_ClearBufferfv(GLenum buffer, GLint drawbuffer,
 254                             const GLfloat *value);
 255
 256 #endif /* MARSHAL_H */