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/*
* Copyright © 2008 Intel Corporation
*
* 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, sublicense,
* 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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS 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.
*
* Authors:
* Eric Anholt <eric@anholt.net>
*
*/
/**
* @file intel_bufmgr_priv.h
*
* Private definitions of Intel-specific bufmgr functions and structures.
*/
#ifndef INTEL_BUFMGR_PRIV_H
#define INTEL_BUFMGR_PRIV_H
/**
* Context for a buffer manager instance.
*
* Contains public methods followed by private storage for the buffer manager.
*/
struct _drm_intel_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.
*/
drm_intel_bo *(*bo_alloc)(drm_intel_bufmgr *bufmgr, const char *name,
unsigned long size, unsigned int alignment);
/**
* Allocate a buffer object, hinting that it will be used as a render target.
*
* This is otherwise the same as bo_alloc.
*/
drm_intel_bo *(*bo_alloc_for_render)(drm_intel_bufmgr *bufmgr,
const char *name,
unsigned long size,
unsigned int alignment);
/** Takes a reference on a buffer object */
void (*bo_reference)(drm_intel_bo *bo);
/**
* Releases a reference on a buffer object, freeing the data if
* rerefences remain.
*/
void (*bo_unreference)(drm_intel_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)(drm_intel_bo *bo, int write_enable);
/** Reduces the refcount on the userspace mapping of the buffer object. */
int (*bo_unmap)(drm_intel_bo *bo);
/**
* Write data into an object.
*
* This is an optional function, if missing,
* drm_intel_bo will map/memcpy/unmap.
*/
int (*bo_subdata)(drm_intel_bo *bo, unsigned long offset,
unsigned long size, const void *data);
/**
* Read data from an object
*
* This is an optional function, if missing,
* drm_intel_bo will map/memcpy/unmap.
*/
int (*bo_get_subdata)(drm_intel_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)(drm_intel_bo *bo);
/**
* Tears down the buffer manager instance.
*/
void (*destroy)(drm_intel_bufmgr *bufmgr);
/**
* Add relocation entry in reloc_buf, which will be updated with the
* target buffer's real offset on on command submission.
*
* Relocations remain in place for the lifetime of the buffer object.
*
* \param bo Buffer to write the relocation into.
* \param offset Byte offset within reloc_bo of the pointer to target_bo.
* \param target_bo Buffer whose offset should be written into the
* relocation entry.
* \param target_offset Constant value to be added to target_bo's offset in
* relocation entry.
* \param read_domains GEM read domains which the buffer will be read into
* by the command that this relocation is part of.
* \param write_domains GEM read domains which the buffer will be dirtied
* in by the command that this relocation is part of.
*/
int (*bo_emit_reloc)(drm_intel_bo *bo, uint32_t offset,
drm_intel_bo *target_bo, uint32_t target_offset,
uint32_t read_domains, uint32_t write_domain);
/** Executes the command buffer pointed to by bo. */
int (*bo_exec)(drm_intel_bo *bo, int used,
drm_clip_rect_t *cliprects, int num_cliprects,
int DR4);
/**
* Pin a buffer to the aperture and fix the offset until unpinned
*
* \param buf Buffer to pin
* \param alignment Required alignment for aperture, in bytes
*/
int (*bo_pin)(drm_intel_bo *bo, uint32_t alignment);
/**
* Unpin a buffer from the aperture, allowing it to be removed
*
* \param buf Buffer to unpin
*/
int (*bo_unpin)(drm_intel_bo *bo);
/**
* Ask that the buffer be placed in tiling mode
*
* \param buf Buffer to set tiling mode for
* \param tiling_mode desired, and returned tiling mode
*/
int (*bo_set_tiling)(drm_intel_bo *bo, uint32_t *tiling_mode,
uint32_t stride);
/**
* Get the current tiling (and resulting swizzling) mode for the bo.
*
* \param buf Buffer to get tiling mode for
* \param tiling_mode returned tiling mode
* \param swizzle_mode returned swizzling mode
*/
int (*bo_get_tiling)(drm_intel_bo *bo, uint32_t *tiling_mode,
uint32_t *swizzle_mode);
/**
* Create a visible name for a buffer which can be used by other apps
*
* \param buf Buffer to create a name for
* \param name Returned name
*/
int (*bo_flink)(drm_intel_bo *bo, uint32_t *name);
/**
* Returns 1 if mapping the buffer for write could cause the process
* to block, due to the object being active in the GPU.
*/
int (*bo_busy)(drm_intel_bo *bo);
int (*check_aperture_space)(drm_intel_bo **bo_array, int count);
/**
* Disable buffer reuse for buffers which will be shared in some way,
* as with scanout buffers. When the buffer reference count goes to zero,
* it will be freed and not placed in the reuse list.
*
* \param bo Buffer to disable reuse for
*/
int (*bo_disable_reuse)(drm_intel_bo *bo);
/**
*
* Return the pipe associated with a crtc_id so that vblank
* synchronization can use the correct data in the request.
* This is only supported for KMS and gem at this point, when
* unsupported, this function returns -1 and leaves the decision
* of what to do in that case to the caller
*
* \param bufmgr the associated buffer manager
* \param crtc_id the crtc identifier
*/
int (*get_pipe_from_crtc_id)(drm_intel_bufmgr *bufmgr, int crtc_id);
/** Returns true if target_bo is in the relocation tree rooted at bo. */
int (*bo_references)(drm_intel_bo *bo, drm_intel_bo *target_bo);
int debug; /**< Enables verbose debugging printouts */
};
#endif /* INTEL_BUFMGR_PRIV_H */
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