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  1. /*
  2.  * Copyright (C) 2009 Francisco Jerez.
  3.  * All Rights Reserved.
  4.  *
  5.  * Permission is hereby granted, free of charge, to any person obtaining
  6.  * a copy of this software and associated documentation files (the
  7.  * "Software"), to deal in the Software without restriction, including
  8.  * without limitation the rights to use, copy, modify, merge, publish,
  9.  * distribute, sublicense, and/or sell copies of the Software, and to
  10.  * permit persons to whom the Software is furnished to do so, subject to
  11.  * the following conditions:
  12.  *
  13.  * The above copyright notice and this permission notice (including the
  14.  * next paragraph) shall be included in all copies or substantial
  15.  * portions of the Software.
  16.  *
  17.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18.  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19.  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20.  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21.  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22.  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23.  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24.  *
  25.  */
  26.  
  27. #include "nouveau_driver.h"
  28. #include "nouveau_bufferobj.h"
  29. #include "nouveau_context.h"
  30.  
  31. #include "main/bufferobj.h"
  32.  
  33. static inline char *
  34. get_bufferobj_map(struct gl_context *ctx, struct gl_buffer_object *obj,
  35.                   unsigned flags)
  36. {
  37.         struct nouveau_bufferobj *nbo = to_nouveau_bufferobj(obj);
  38.         void *map = NULL;
  39.  
  40.         if (nbo->sys) {
  41.                 map = nbo->sys;
  42.         } else if (nbo->bo) {
  43.                 nouveau_bo_map(nbo->bo, flags, context_client(ctx));
  44.                 map = nbo->bo->map;
  45.         }
  46.  
  47.         return map;
  48. }
  49.  
  50. static struct gl_buffer_object *
  51. nouveau_bufferobj_new(struct gl_context *ctx, GLuint buffer, GLenum target)
  52. {
  53.         struct nouveau_bufferobj *nbo;
  54.  
  55.         nbo = CALLOC_STRUCT(nouveau_bufferobj);
  56.         if (!nbo)
  57.                 return NULL;
  58.  
  59.         _mesa_initialize_buffer_object(ctx, &nbo->base, buffer, target);
  60.  
  61.         return &nbo->base;
  62. }
  63.  
  64. static void
  65. nouveau_bufferobj_del(struct gl_context *ctx, struct gl_buffer_object *obj)
  66. {
  67.         struct nouveau_bufferobj *nbo = to_nouveau_bufferobj(obj);
  68.  
  69.         nouveau_bo_ref(NULL, &nbo->bo);
  70.         free(nbo->sys);
  71.         free(nbo);
  72. }
  73.  
  74. static GLboolean
  75. nouveau_bufferobj_data(struct gl_context *ctx, GLenum target, GLsizeiptrARB size,
  76.                        const GLvoid *data, GLenum usage,
  77.                        struct gl_buffer_object *obj)
  78. {
  79.         struct nouveau_bufferobj *nbo = to_nouveau_bufferobj(obj);
  80.         int ret;
  81.  
  82.         obj->Size = size;
  83.         obj->Usage = usage;
  84.  
  85.         /* Free previous storage */
  86.         nouveau_bo_ref(NULL, &nbo->bo);
  87.         free(nbo->sys);
  88.  
  89.         if (target == GL_ELEMENT_ARRAY_BUFFER_ARB ||
  90.             (size < 512 && usage == GL_DYNAMIC_DRAW_ARB) ||
  91.             context_chipset(ctx) < 0x10) {
  92.                 /* Heuristic: keep it in system ram */
  93.                 nbo->sys = malloc(size);
  94.  
  95.         } else {
  96.                 /* Get a hardware BO */
  97.                 ret = nouveau_bo_new(context_dev(ctx),
  98.                                      NOUVEAU_BO_GART | NOUVEAU_BO_MAP, 0,
  99.                                      size, NULL, &nbo->bo);
  100.                 assert(!ret);
  101.         }
  102.  
  103.         if (data)
  104.                 memcpy(get_bufferobj_map(ctx, obj, NOUVEAU_BO_WR), data, size);
  105.  
  106.         return GL_TRUE;
  107. }
  108.  
  109. static void
  110. nouveau_bufferobj_subdata(struct gl_context *ctx, GLintptrARB offset,
  111.                           GLsizeiptrARB size, const GLvoid *data,
  112.                           struct gl_buffer_object *obj)
  113. {
  114.         memcpy(get_bufferobj_map(ctx, obj, NOUVEAU_BO_WR) + offset, data, size);
  115. }
  116.  
  117. static void
  118. nouveau_bufferobj_get_subdata(struct gl_context *ctx, GLintptrARB offset,
  119.                            GLsizeiptrARB size, GLvoid *data,
  120.                            struct gl_buffer_object *obj)
  121. {
  122.         memcpy(data, get_bufferobj_map(ctx, obj, NOUVEAU_BO_RD) + offset, size);
  123. }
  124.  
  125. static void *
  126. nouveau_bufferobj_map_range(struct gl_context *ctx, GLintptr offset,
  127.                             GLsizeiptr length, GLbitfield access,
  128.                             struct gl_buffer_object *obj)
  129. {
  130.         unsigned flags = 0;
  131.         char *map;
  132.  
  133.         assert(!obj->Pointer);
  134.  
  135.         if (!(access & GL_MAP_UNSYNCHRONIZED_BIT)) {
  136.                 if (access & GL_MAP_READ_BIT)
  137.                         flags |= NOUVEAU_BO_RD;
  138.                 if (access & GL_MAP_WRITE_BIT)
  139.                         flags |= NOUVEAU_BO_WR;
  140.         }
  141.  
  142.         map = get_bufferobj_map(ctx, obj, flags);
  143.         if (!map)
  144.                 return NULL;
  145.  
  146.         obj->Pointer = map + offset;
  147.         obj->Offset = offset;
  148.         obj->Length = length;
  149.         obj->AccessFlags = access;
  150.  
  151.         return obj->Pointer;
  152. }
  153.  
  154. static GLboolean
  155. nouveau_bufferobj_unmap(struct gl_context *ctx, struct gl_buffer_object *obj)
  156. {
  157.         assert(obj->Pointer);
  158.  
  159.         obj->Pointer = NULL;
  160.         obj->Offset = 0;
  161.         obj->Length = 0;
  162.         obj->AccessFlags = 0;
  163.  
  164.         return GL_TRUE;
  165. }
  166.  
  167. void
  168. nouveau_bufferobj_functions_init(struct dd_function_table *functions)
  169. {
  170.         functions->NewBufferObject = nouveau_bufferobj_new;
  171.         functions->DeleteBuffer = nouveau_bufferobj_del;
  172.         functions->BufferData = nouveau_bufferobj_data;
  173.         functions->BufferSubData = nouveau_bufferobj_subdata;
  174.         functions->GetBufferSubData = nouveau_bufferobj_get_subdata;
  175.         functions->MapBufferRange = nouveau_bufferobj_map_range;
  176.         functions->UnmapBuffer = nouveau_bufferobj_unmap;
  177. }
  178.