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/**************************************************************************
*
* Copyright 2005 VMware, Inc.
* 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 VMWARE 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.
*
**************************************************************************/
#ifndef INTEL_BUFFEROBJ_H
#define INTEL_BUFFEROBJ_H
#include "main/mtypes.h"
struct brw_context;
struct gl_buffer_object;
/**
* Intel vertex/pixel buffer object, derived from Mesa's gl_buffer_object.
*/
struct intel_buffer_object
{
struct gl_buffer_object Base;
drm_intel_bo *buffer; /* the low-level buffer manager's buffer handle */
drm_intel_bo *range_map_bo[MAP_COUNT];
/**
* Alignment offset from the range_map_bo temporary mapping to the returned
* obj->Pointer (caused by GL_ARB_map_buffer_alignment).
*/
unsigned map_extra[MAP_COUNT];
/** @{
* Tracking for what range of the BO may currently be in use by the GPU.
*
* Users often want to either glBufferSubData() or glMapBufferRange() a
* buffer object where some subset of it is busy on the GPU, without either
* stalling or doing an extra blit (since our blits are extra expensive,
* given that we have to reupload most of the 3D state when switching
* rings). We wish they'd just use glMapBufferRange() with the
* UNSYNC|INVALIDATE_RANGE flag or the INVALIDATE_BUFFER flag, but lots
* don't.
*
* To work around apps, we track what range of the BO we might have used on
* the GPU as vertex data, tranform feedback output, buffer textures, etc.,
* and just do glBufferSubData() with an unsynchronized map when they're
* outside of that range.
*
* If gpu_active_start > gpu_active_end, then the GPU is not currently
* accessing the BO (and we can map it without synchronization).
*/
uint32_t gpu_active_start;
uint32_t gpu_active_end;
/**
* If we've avoided stalls/blits using the active tracking, flag the buffer
* for (occasional) stalling in the future to avoid getting stuck in a
* cycle of blitting on buffer wraparound.
*/
bool prefer_stall_to_blit;
/** @} */
};
/* Get the bm buffer associated with a GL bufferobject:
*/
drm_intel_bo *intel_bufferobj_buffer(struct brw_context *brw,
struct intel_buffer_object *obj,
uint32_t offset,
uint32_t size);
void intel_upload_data(struct brw_context *brw,
const void *data,
uint32_t size,
uint32_t alignment,
drm_intel_bo **out_bo,
uint32_t *out_offset);
void *intel_upload_space(struct brw_context *brw,
uint32_t size,
uint32_t alignment,
drm_intel_bo **out_bo,
uint32_t *out_offset);
void intel_upload_finish(struct brw_context *brw);
/* Hook the bufferobject implementation into mesa:
*/
void intelInitBufferObjectFuncs(struct dd_function_table *functions);
static inline struct intel_buffer_object *
intel_buffer_object(struct gl_buffer_object *obj)
{
return (struct intel_buffer_object *) obj;
}
#endif
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