src/mesa/drivers/dri/radeon/radeon_buffer_objects.c

   1 /*
   2  * Copyright 2009 Maciej Cencora <m.cencora@gmail.com>
   3  *
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining
   7  * a copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sublicense, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial
  16  * portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  21  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  22  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  */
  27
  28 #include "radeon_buffer_objects.h"
  29
  30 #include "main/imports.h"
  31 #include "main/mtypes.h"
  32 #include "main/bufferobj.h"
  33
  34 #include "radeon_common.h"
  35
  36 struct radeon_buffer_object *
  37 get_radeon_buffer_object(struct gl_buffer_object *obj)
  38 {
  39     return (struct radeon_buffer_object *) obj;
  40 }
  41
  42 static struct gl_buffer_object *
  43 radeonNewBufferObject(struct gl_context * ctx,
  44                       GLuint name,
  45                       GLenum target)
  46 {
  47     struct radeon_buffer_object *obj = CALLOC_STRUCT(radeon_buffer_object);
  48
  49     _mesa_initialize_buffer_object(ctx, &obj->Base, name, target);
  50
  51     obj->bo = NULL;
  52
  53     return &obj->Base;
  54 }
  55
  56 /**
  57  * Called via glDeleteBuffersARB().
  58  */
  59 static void
  60 radeonDeleteBufferObject(struct gl_context * ctx,
  61                          struct gl_buffer_object *obj)
  62 {
  63     struct radeon_buffer_object *radeon_obj = get_radeon_buffer_object(obj);
  64
  65     if (obj->Pointer) {
  66         radeon_bo_unmap(radeon_obj->bo);
  67     }
  68
  69     if (radeon_obj->bo) {
  70         radeon_bo_unref(radeon_obj->bo);
  71     }
  72
  73     free(radeon_obj);
  74 }
  75
  76
  77 /**
  78  * Allocate space for and store data in a buffer object.  Any data that was
  79  * previously stored in the buffer object is lost.  If data is NULL,
  80  * memory will be allocated, but no copy will occur.
  81  * Called via ctx->Driver.BufferData().
  82  * \return GL_TRUE for success, GL_FALSE if out of memory
  83  */
  84 static GLboolean
  85 radeonBufferData(struct gl_context * ctx,
  86                  GLenum target,
  87                  GLsizeiptrARB size,
  88                  const GLvoid * data,
  89                  GLenum usage,
  90                  struct gl_buffer_object *obj)
  91 {
  92     radeonContextPtr radeon = RADEON_CONTEXT(ctx);
  93     struct radeon_buffer_object *radeon_obj = get_radeon_buffer_object(obj);
  94
  95     radeon_obj->Base.Size = size;
  96     radeon_obj->Base.Usage = usage;
  97
  98     if (radeon_obj->bo != NULL) {
  99         radeon_bo_unref(radeon_obj->bo);
 100         radeon_obj->bo = NULL;
 101     }
 102
 103     if (size != 0) {
 104         radeon_obj->bo = radeon_bo_open(radeon->radeonScreen->bom,
 105                                         0,
 106                                         size,
 107                                         32,
 108                                         RADEON_GEM_DOMAIN_GTT,
 109                                         0);
 110
 111         if (!radeon_obj->bo)
 112             return GL_FALSE;
 113
 114         if (data != NULL) {
 115             radeon_bo_map(radeon_obj->bo, GL_TRUE);
 116
 117             memcpy(radeon_obj->bo->ptr, data, size);
 118
 119             radeon_bo_unmap(radeon_obj->bo);
 120         }
 121     }
 122     return GL_TRUE;
 123 }
 124
 125 /**
 126  * Replace data in a subrange of buffer object.  If the data range
 127  * specified by size + offset extends beyond the end of the buffer or
 128  * if data is NULL, no copy is performed.
 129  * Called via glBufferSubDataARB().
 130  */
 131 static void
 132 radeonBufferSubData(struct gl_context * ctx,
 133                     GLintptrARB offset,
 134                     GLsizeiptrARB size,
 135                     const GLvoid * data,
 136                     struct gl_buffer_object *obj)
 137 {
 138     radeonContextPtr radeon = RADEON_CONTEXT(ctx);
 139     struct radeon_buffer_object *radeon_obj = get_radeon_buffer_object(obj);
 140
 141     if (radeon_bo_is_referenced_by_cs(radeon_obj->bo, radeon->cmdbuf.cs)) {
 142         radeon_firevertices(radeon);
 143     }
 144
 145     radeon_bo_map(radeon_obj->bo, GL_TRUE);
 146
 147     memcpy(radeon_obj->bo->ptr + offset, data, size);
 148
 149     radeon_bo_unmap(radeon_obj->bo);
 150 }
 151
 152 /**
 153  * Called via glGetBufferSubDataARB()
 154  */
 155 static void
 156 radeonGetBufferSubData(struct gl_context * ctx,
 157                        GLintptrARB offset,
 158                        GLsizeiptrARB size,
 159                        GLvoid * data,
 160                        struct gl_buffer_object *obj)
 161 {
 162     struct radeon_buffer_object *radeon_obj = get_radeon_buffer_object(obj);
 163
 164     radeon_bo_map(radeon_obj->bo, GL_FALSE);
 165
 166     memcpy(data, radeon_obj->bo->ptr + offset, size);
 167
 168     radeon_bo_unmap(radeon_obj->bo);
 169 }
 170
 171 /**
 172  * Called via glMapBuffer() and glMapBufferRange()
 173  */
 174 static void *
 175 radeonMapBufferRange(struct gl_context * ctx,
 176                      GLintptr offset, GLsizeiptr length,
 177                      GLbitfield access, struct gl_buffer_object *obj)
 178 {
 179     struct radeon_buffer_object *radeon_obj = get_radeon_buffer_object(obj);
 180     const GLboolean write_only =
 181        (access & (GL_MAP_READ_BIT | GL_MAP_WRITE_BIT)) == GL_MAP_WRITE_BIT;
 182
 183     if (write_only) {
 184         ctx->Driver.Flush(ctx);
 185     }
 186
 187     if (radeon_obj->bo == NULL) {
 188         obj->Pointer = NULL;
 189         return NULL;
 190     }
 191
 192     obj->Offset = offset;
 193     obj->Length = length;
 194     obj->AccessFlags = access;
 195
 196     radeon_bo_map(radeon_obj->bo, write_only);
 197
 198     obj->Pointer = radeon_obj->bo->ptr + offset;
 199     return obj->Pointer;
 200 }
 201
 202
 203 /**
 204  * Called via glUnmapBufferARB()
 205  */
 206 static GLboolean
 207 radeonUnmapBuffer(struct gl_context * ctx,
 208                   struct gl_buffer_object *obj)
 209 {
 210     struct radeon_buffer_object *radeon_obj = get_radeon_buffer_object(obj);
 211
 212     if (radeon_obj->bo != NULL) {
 213         radeon_bo_unmap(radeon_obj->bo);
 214     }
 215
 216     obj->Pointer = NULL;
 217     obj->Offset = 0;
 218     obj->Length = 0;
 219
 220     return GL_TRUE;
 221 }
 222
 223 void
 224 radeonInitBufferObjectFuncs(struct dd_function_table *functions)
 225 {
 226     functions->NewBufferObject = radeonNewBufferObject;
 227     functions->DeleteBuffer = radeonDeleteBufferObject;
 228     functions->BufferData = radeonBufferData;
 229     functions->BufferSubData = radeonBufferSubData;
 230     functions->GetBufferSubData = radeonGetBufferSubData;
 231     functions->MapBufferRange = radeonMapBufferRange;
 232     functions->UnmapBuffer = radeonUnmapBuffer;
 233 }