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/**************************************************************************
*
* Copyright © 2007 Intel Corporation
* Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., USA
* 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 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
* THE COPYRIGHT HOLDERS, AUTHORS 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.
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
*
**************************************************************************/
/*
* Authors: Thomas Hellström <thomas-at-tungstengraphics-dot-com>
* Keith Whitwell <keithw-at-tungstengraphics-dot-com>
* Eric Anholt <eric@anholt.net>
*/
#ifndef _DRI_BUFMGR_H_
#define _DRI_BUFMGR_H_
#include <xf86drm.h>
typedef struct _dri_bufmgr dri_bufmgr;
typedef struct _dri_bo dri_bo;
struct _dri_bo {
/**
* Size in bytes of the buffer object.
*
* The size may be larger than the size originally requested for the
* allocation, such as being aligned to page size.
*/
unsigned long size;
/**
* Card virtual address (offset from the beginning of the aperture) for the
* object. Only valid while validated.
*/
unsigned long offset;
/**
* Virtual address for accessing the buffer data. Only valid while mapped.
*/
void *virtual;
/** Buffer manager context associated with this buffer object */
dri_bufmgr *bufmgr;
};
/**
* Context for a buffer manager instance.
*
* Contains public methods followed by private storage for the buffer manager.
*/
struct _dri_bufmgr {
/**
* Allocate a buffer object.
*
* Buffer objects are not necessarily initially mapped into CPU virtual
* address space or graphics device aperture. They must be mapped using
* bo_map() to be used by the CPU, and validated for use using bo_validate()
* to be used from the graphics device.
*/
dri_bo *(*bo_alloc)(dri_bufmgr *bufmgr_ctx, const char *name,
unsigned long size, unsigned int alignment);
/** Takes a reference on a buffer object */
void (*bo_reference)(dri_bo *bo);
/**
* Releases a reference on a buffer object, freeing the data if
* rerefences remain.
*/
void (*bo_unreference)(dri_bo *bo);
/**
* Maps the buffer into userspace.
*
* This function will block waiting for any existing execution on the
* buffer to complete, first. The resulting mapping is available at
* buf->virtual.
*/
int (*bo_map)(dri_bo *buf, int write_enable);
/** Reduces the refcount on the userspace mapping of the buffer object. */
int (*bo_unmap)(dri_bo *buf);
/**
* Write data into an object.
*
* This is an optional function, if missing,
* dri_bo will map/memcpy/unmap.
*/
int (*bo_subdata) (dri_bo *buf, unsigned long offset,
unsigned long size, const void *data);
/**
* Read data from an object
*
* This is an optional function, if missing,
* dri_bo will map/memcpy/unmap.
*/
int (*bo_get_subdata) (dri_bo *bo, unsigned long offset,
unsigned long size, void *data);
/**
* Waits for rendering to an object by the GPU to have completed.
*
* This is not required for any access to the BO by bo_map, bo_subdata, etc.
* It is merely a way for the driver to implement glFinish.
*/
void (*bo_wait_rendering) (dri_bo *bo);
/**
* Tears down the buffer manager instance.
*/
void (*destroy)(dri_bufmgr *bufmgr);
/**
* Processes the relocations, either in userland or by converting the list
* for use in batchbuffer submission.
*
* Kernel-based implementations will return a pointer to the arguments
* to be handed with batchbuffer submission to the kernel. The userland
* implementation performs the buffer validation and emits relocations
* into them the appopriate order.
*
* \param batch_buf buffer at the root of the tree of relocations
* \return argument to be completed and passed to the execbuffers ioctl
* (if any).
*/
void *(*process_relocs)(dri_bo *batch_buf);
void (*post_submit)(dri_bo *batch_buf);
int (*check_aperture_space)(dri_bo *bo);
int debug; /**< Enables verbose debugging printouts */
};
dri_bo *dri_bo_alloc(dri_bufmgr *bufmgr, const char *name, unsigned long size,
unsigned int alignment);
void dri_bo_reference(dri_bo *bo);
void dri_bo_unreference(dri_bo *bo);
int dri_bo_map(dri_bo *buf, int write_enable);
int dri_bo_unmap(dri_bo *buf);
int dri_bo_subdata(dri_bo *bo, unsigned long offset,
unsigned long size, const void *data);
int dri_bo_get_subdata(dri_bo *bo, unsigned long offset,
unsigned long size, void *data);
void dri_bo_wait_rendering(dri_bo *bo);
void dri_bufmgr_set_debug(dri_bufmgr *bufmgr, int enable_debug);
void dri_bufmgr_destroy(dri_bufmgr *bufmgr);
void *dri_process_relocs(dri_bo *batch_buf);
void dri_post_process_relocs(dri_bo *batch_buf);
void dri_post_submit(dri_bo *batch_buf);
int dri_bufmgr_check_aperture_space(dri_bo *bo);
#endif
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