/*
* 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() or drm_intel_gem_bo_map_gtt() to be used by the CPU.
*/
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);
/**
* Allocate a tiled buffer object.
*
* Alignment for tiled objects is set automatically; the 'flags'
* argument provides a hint about how the object will be used initially.
*
* Valid tiling formats are:
* I915_TILING_NONE
* I915_TILING_X
* I915_TILING_Y
*
* Note the tiling format may be rejected; callers should check the
* 'tiling_mode' field on return, as well as the pitch value, which
* may have been rounded up to accommodate for tiling restrictions.
*/
drm_intel_bo *(*bo_alloc_tiled) (drm_intel_bufmgr *bufmgr,
const char *name,
int x, int y, int cpp,
uint32_t *tiling_mode,
unsigned long *pitch,
unsigned long flags);
/** 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
* no references 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);
int (*bo_emit_reloc_fence)(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);
/** Executes the command buffer pointed to by bo on the selected
* ring buffer
*/
int (*bo_mrb_exec) (drm_intel_bo *bo, int used,
drm_clip_rect_t *cliprects, int num_cliprects,
int DR4, unsigned flags);
/**
* 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);
/**
* Specify the volatility of the buffer.
* \param bo Buffer to create a name for
* \param madv The purgeable status
*
* Use I915_MADV_DONTNEED to mark the buffer as purgeable, and it will be
* reclaimed under memory pressure. If you subsequently require the buffer,
* then you must pass I915_MADV_WILLNEED to mark the buffer as required.
*
* Returns 1 if the buffer was retained, or 0 if it was discarded whilst
* marked as I915_MADV_DONTNEED.
*/
int (*bo_madvise) (drm_intel_bo *bo, int madv);
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);
/**
* Query whether a buffer is reusable.
*
* \param bo Buffer to query
*/
int (*bo_is_reusable) (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);
/**< Enables verbose debugging printouts */
int debug;
};
struct _drm_intel_context {
unsigned int ctx_id;
struct _drm_intel_bufmgr *bufmgr;
};
#define ALIGN(value, alignment) ((value + alignment - 1) & ~(alignment - 1))
#define ROUND_UP_TO(x, y) (((x) + (y) - 1) / (y) * (y))
#define ROUND_UP_TO_MB(x) ROUND_UP_TO((x), 1024*1024)
#endif /* INTEL_BUFMGR_PRIV_H */