mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-27 13:05:03 +08:00
dfadbbdb57
Sometimes we want to know whether a buffer is busy and wait for it (bo_wait). However, sometimes it would be more useful to be able to query whether a buffer is busy and being either read or written, and wait until it's stopped being either read or written. The point of this is to be able to avoid unnecessary waiting, e.g. if a GPU has written something to a buffer and is now reading that buffer, and a CPU wants to map that buffer for read, it needs to only wait for the last write. If there were no write, there wouldn't be any waiting needed. This, or course, requires user space drivers to send read/write flags with each relocation (like we have read/write domains in radeon, so we can actually use those for something useful now). Now how this patch works: The read/write flags should passed to ttm_validate_buffer. TTM maintains separate sync objects of the last read and write for each buffer, in addition to the sync object of the last use of a buffer. ttm_bo_wait then operates with one the sync objects. Signed-off-by: Marek Olšák <maraeo@gmail.com> Reviewed-by: Jerome Glisse <jglisse@redhat.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
168 lines
5.3 KiB
C
168 lines
5.3 KiB
C
/*
|
|
* Copyright 2008 Advanced Micro Devices, Inc.
|
|
* Copyright 2008 Red Hat Inc.
|
|
* Copyright 2009 Jerome Glisse.
|
|
*
|
|
* 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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: Dave Airlie
|
|
* Alex Deucher
|
|
* Jerome Glisse
|
|
*/
|
|
#ifndef __RADEON_OBJECT_H__
|
|
#define __RADEON_OBJECT_H__
|
|
|
|
#include <drm/radeon_drm.h>
|
|
#include "radeon.h"
|
|
|
|
/**
|
|
* radeon_mem_type_to_domain - return domain corresponding to mem_type
|
|
* @mem_type: ttm memory type
|
|
*
|
|
* Returns corresponding domain of the ttm mem_type
|
|
*/
|
|
static inline unsigned radeon_mem_type_to_domain(u32 mem_type)
|
|
{
|
|
switch (mem_type) {
|
|
case TTM_PL_VRAM:
|
|
return RADEON_GEM_DOMAIN_VRAM;
|
|
case TTM_PL_TT:
|
|
return RADEON_GEM_DOMAIN_GTT;
|
|
case TTM_PL_SYSTEM:
|
|
return RADEON_GEM_DOMAIN_CPU;
|
|
default:
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* radeon_bo_reserve - reserve bo
|
|
* @bo: bo structure
|
|
* @no_wait: don't sleep while trying to reserve (return -EBUSY)
|
|
*
|
|
* Returns:
|
|
* -EBUSY: buffer is busy and @no_wait is true
|
|
* -ERESTARTSYS: A wait for the buffer to become unreserved was interrupted by
|
|
* a signal. Release all buffer reservations and return to user-space.
|
|
*/
|
|
static inline int radeon_bo_reserve(struct radeon_bo *bo, bool no_wait)
|
|
{
|
|
int r;
|
|
|
|
r = ttm_bo_reserve(&bo->tbo, true, no_wait, false, 0);
|
|
if (unlikely(r != 0)) {
|
|
if (r != -ERESTARTSYS)
|
|
dev_err(bo->rdev->dev, "%p reserve failed\n", bo);
|
|
return r;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static inline void radeon_bo_unreserve(struct radeon_bo *bo)
|
|
{
|
|
ttm_bo_unreserve(&bo->tbo);
|
|
}
|
|
|
|
/**
|
|
* radeon_bo_gpu_offset - return GPU offset of bo
|
|
* @bo: radeon object for which we query the offset
|
|
*
|
|
* Returns current GPU offset of the object.
|
|
*
|
|
* Note: object should either be pinned or reserved when calling this
|
|
* function, it might be useful to add check for this for debugging.
|
|
*/
|
|
static inline u64 radeon_bo_gpu_offset(struct radeon_bo *bo)
|
|
{
|
|
return bo->tbo.offset;
|
|
}
|
|
|
|
static inline unsigned long radeon_bo_size(struct radeon_bo *bo)
|
|
{
|
|
return bo->tbo.num_pages << PAGE_SHIFT;
|
|
}
|
|
|
|
static inline bool radeon_bo_is_reserved(struct radeon_bo *bo)
|
|
{
|
|
return !!atomic_read(&bo->tbo.reserved);
|
|
}
|
|
|
|
/**
|
|
* radeon_bo_mmap_offset - return mmap offset of bo
|
|
* @bo: radeon object for which we query the offset
|
|
*
|
|
* Returns mmap offset of the object.
|
|
*
|
|
* Note: addr_space_offset is constant after ttm bo init thus isn't protected
|
|
* by any lock.
|
|
*/
|
|
static inline u64 radeon_bo_mmap_offset(struct radeon_bo *bo)
|
|
{
|
|
return bo->tbo.addr_space_offset;
|
|
}
|
|
|
|
static inline int radeon_bo_wait(struct radeon_bo *bo, u32 *mem_type,
|
|
bool no_wait)
|
|
{
|
|
int r;
|
|
|
|
r = ttm_bo_reserve(&bo->tbo, true, no_wait, false, 0);
|
|
if (unlikely(r != 0))
|
|
return r;
|
|
spin_lock(&bo->tbo.bdev->fence_lock);
|
|
if (mem_type)
|
|
*mem_type = bo->tbo.mem.mem_type;
|
|
if (bo->tbo.sync_obj)
|
|
r = ttm_bo_wait(&bo->tbo, true, true, no_wait, TTM_USAGE_READWRITE);
|
|
spin_unlock(&bo->tbo.bdev->fence_lock);
|
|
ttm_bo_unreserve(&bo->tbo);
|
|
return r;
|
|
}
|
|
|
|
extern int radeon_bo_create(struct radeon_device *rdev,
|
|
unsigned long size, int byte_align,
|
|
bool kernel, u32 domain,
|
|
struct radeon_bo **bo_ptr);
|
|
extern int radeon_bo_kmap(struct radeon_bo *bo, void **ptr);
|
|
extern void radeon_bo_kunmap(struct radeon_bo *bo);
|
|
extern void radeon_bo_unref(struct radeon_bo **bo);
|
|
extern int radeon_bo_pin(struct radeon_bo *bo, u32 domain, u64 *gpu_addr);
|
|
extern int radeon_bo_unpin(struct radeon_bo *bo);
|
|
extern int radeon_bo_evict_vram(struct radeon_device *rdev);
|
|
extern void radeon_bo_force_delete(struct radeon_device *rdev);
|
|
extern int radeon_bo_init(struct radeon_device *rdev);
|
|
extern void radeon_bo_fini(struct radeon_device *rdev);
|
|
extern void radeon_bo_list_add_object(struct radeon_bo_list *lobj,
|
|
struct list_head *head);
|
|
extern int radeon_bo_list_validate(struct list_head *head);
|
|
extern int radeon_bo_fbdev_mmap(struct radeon_bo *bo,
|
|
struct vm_area_struct *vma);
|
|
extern int radeon_bo_set_tiling_flags(struct radeon_bo *bo,
|
|
u32 tiling_flags, u32 pitch);
|
|
extern void radeon_bo_get_tiling_flags(struct radeon_bo *bo,
|
|
u32 *tiling_flags, u32 *pitch);
|
|
extern int radeon_bo_check_tiling(struct radeon_bo *bo, bool has_moved,
|
|
bool force_drop);
|
|
extern void radeon_bo_move_notify(struct ttm_buffer_object *bo,
|
|
struct ttm_mem_reg *mem);
|
|
extern int radeon_bo_fault_reserve_notify(struct ttm_buffer_object *bo);
|
|
extern int radeon_bo_get_surface_reg(struct radeon_bo *bo);
|
|
#endif
|