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/**************************************************************************
*
* Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
#include "imports.h"
#include "mtypes.h"
#include "bufferobj.h"
#include "intel_context.h"
#include "intel_buffer_objects.h"
#include "intel_regions.h"
#include "dri_bufmgr.h"
/**
* There is some duplication between mesa's bufferobjects and our
* bufmgr buffers. Both have an integer handle and a hashtable to
* lookup an opaque structure. It would be nice if the handles and
* internal structure where somehow shared.
*/
static struct gl_buffer_object *
intel_bufferobj_alloc(GLcontext * ctx, GLuint name, GLenum target)
{
struct intel_context *intel = intel_context(ctx);
struct intel_buffer_object *obj = CALLOC_STRUCT(intel_buffer_object);
_mesa_initialize_buffer_object(&obj->Base, name, target);
driGenBuffers(intel->intelScreen->regionPool,
"bufferobj", 1, &obj->buffer, 64,
DRM_BO_FLAG_MEM_LOCAL |
DRM_BO_FLAG_READ | DRM_BO_FLAG_WRITE,
0);
return &obj->Base;
}
/* Break the COW tie to the region. The region gets to keep the data.
*/
void
intel_bufferobj_release_region(struct intel_context *intel,
struct intel_buffer_object *intel_obj)
{
assert(intel_obj->region->buffer == intel_obj->buffer);
intel_obj->region->pbo = NULL;
intel_obj->region = NULL;
driBOUnReference(intel_obj->buffer);
intel_obj->buffer = NULL;
/* This leads to a large number of buffer deletion/creation events.
* Currently the drm doesn't like that:
*/
driGenBuffers(intel->intelScreen->regionPool,
"buffer object", 1, &intel_obj->buffer, 64, 0, 0);
driBOData(intel_obj->buffer, intel_obj->Base.Size, NULL, 0);
}
/* Break the COW tie to the region. Both the pbo and the region end
* up with a copy of the data.
*/
void
intel_bufferobj_cow(struct intel_context *intel,
struct intel_buffer_object *intel_obj)
{
assert(intel_obj->region);
intel_region_cow(intel->intelScreen, intel_obj->region);
}
/**
* Deallocate/free a vertex/pixel buffer object.
* Called via glDeleteBuffersARB().
*/
static void
intel_bufferobj_free(GLcontext * ctx, struct gl_buffer_object *obj)
{
struct intel_context *intel = intel_context(ctx);
struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
assert(intel_obj);
if (intel_obj->region) {
intel_bufferobj_release_region(intel, intel_obj);
}
else if (intel_obj->buffer) {
driDeleteBuffers(1, &intel_obj->buffer);
}
_mesa_free(intel_obj);
}
/**
* Allocate space for and store data in a buffer object. Any data that was
* previously stored in the buffer object is lost. If data is NULL,
* memory will be allocated, but no copy will occur.
* Called via glBufferDataARB().
*/
static void
intel_bufferobj_data(GLcontext * ctx,
GLenum target,
GLsizeiptrARB size,
const GLvoid * data,
GLenum usage, struct gl_buffer_object *obj)
{
struct intel_context *intel = intel_context(ctx);
struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
intel_obj->Base.Size = size;
intel_obj->Base.Usage = usage;
if (intel_obj->region)
intel_bufferobj_release_region(intel, intel_obj);
driBOData(intel_obj->buffer, size, data, 0);
}
/**
* Replace data in a subrange of buffer object. If the data range
* specified by size + offset extends beyond the end of the buffer or
* if data is NULL, no copy is performed.
* Called via glBufferSubDataARB().
*/
static void
intel_bufferobj_subdata(GLcontext * ctx,
GLenum target,
GLintptrARB offset,
GLsizeiptrARB size,
const GLvoid * data, struct gl_buffer_object *obj)
{
struct intel_context *intel = intel_context(ctx);
struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
assert(intel_obj);
if (intel_obj->region)
intel_bufferobj_cow(intel, intel_obj);
driBOSubData(intel_obj->buffer, offset, size, data);
}
/**
* Called via glGetBufferSubDataARB().
*/
static void
intel_bufferobj_get_subdata(GLcontext * ctx,
GLenum target,
GLintptrARB offset,
GLsizeiptrARB size,
GLvoid * data, struct gl_buffer_object *obj)
{
struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
assert(intel_obj);
driBOGetSubData(intel_obj->buffer, offset, size, data);
}
/**
* Called via glMapBufferARB().
*/
static void *
intel_bufferobj_map(GLcontext * ctx,
GLenum target,
GLenum access, struct gl_buffer_object *obj)
{
struct intel_context *intel = intel_context(ctx);
struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
/* XXX: Translate access to flags arg below:
*/
assert(intel_obj);
if (intel_obj->region)
intel_bufferobj_cow(intel, intel_obj);
obj->Pointer = driBOMap(intel_obj->buffer,
DRM_BO_FLAG_READ | DRM_BO_FLAG_WRITE, 0);
return obj->Pointer;
}
/**
* Called via glMapBufferARB().
*/
static GLboolean
intel_bufferobj_unmap(GLcontext * ctx,
GLenum target, struct gl_buffer_object *obj)
{
struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
assert(intel_obj);
assert(obj->Pointer);
driBOUnmap(intel_obj->buffer);
obj->Pointer = NULL;
return GL_TRUE;
}
struct _DriBufferObject *
intel_bufferobj_buffer(struct intel_context *intel,
struct intel_buffer_object *intel_obj, GLuint flag)
{
if (intel_obj->region) {
if (flag == INTEL_WRITE_PART)
intel_bufferobj_cow(intel, intel_obj);
else if (flag == INTEL_WRITE_FULL)
intel_bufferobj_release_region(intel, intel_obj);
}
return intel_obj->buffer;
}
void
intel_bufferobj_init(struct intel_context *intel)
{
GLcontext *ctx = &intel->ctx;
ctx->Driver.NewBufferObject = intel_bufferobj_alloc;
ctx->Driver.DeleteBuffer = intel_bufferobj_free;
ctx->Driver.BufferData = intel_bufferobj_data;
ctx->Driver.BufferSubData = intel_bufferobj_subdata;
ctx->Driver.GetBufferSubData = intel_bufferobj_get_subdata;
ctx->Driver.MapBuffer = intel_bufferobj_map;
ctx->Driver.UnmapBuffer = intel_bufferobj_unmap;
}
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