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drm/ttm: convert to the reservation api

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Now that the code is compatible in semantics, flip the switch.
Use ww_mutex instead of the homegrown implementation.

ww_mutex uses -EDEADLK to signal that the caller has to back off,
and -EALREADY to indicate this buffer is already held by the caller.

ttm used -EAGAIN and -EDEADLK for those, respectively. So some changes
were needed to handle this correctly.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Maarten Lankhorst
2013-06-27 13:48:19 +02:00
committed by Dave Airlie
parent b580c9e2b7
commit 5e33840511
7 changed files with 80 additions and 194 deletions
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5
drivers/gpu/drm/qxl/qxl_object.h
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@@ -57,11 +57,6 @@ static inline unsigned long qxl_bo_size(struct qxl_bo *bo)
return bo->tbo.num_pages << PAGE_SHIFT;
}
static inline bool qxl_bo_is_reserved(struct qxl_bo *bo)
{
return !!atomic_read(&bo->tbo.reserved);
}
static inline u64 qxl_bo_mmap_offset(struct qxl_bo *bo)
{
return bo->tbo.addr_space_offset;