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drm/radeon: validate relocations in the order determined by userspace v3

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Userspace should set the first 4 bits of drm_radeon_cs_reloc::flags to
a number from 0 to 15. The higher the number, the higher the priority,
which means a buffer with a higher number will be validated sooner.

The old behavior is preserved: Buffers used for write are prioritized over
read-only buffers if the userspace doesn't set the number.

v2: add buffers to buckets directly, then concatenate them
v3: use a stable sort

Signed-off-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
This commit is contained in:
Marek Olšák
2014-03-02 00:56:21 +01:00
committed by Christian König
parent 4330441a74
commit c9b7654889
4 changed files with 61 additions and 16 deletions
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10
drivers/gpu/drm/radeon/radeon_object.c
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@@ -366,16 +366,6 @@ void radeon_bo_fini(struct radeon_device *rdev)
arch_phys_wc_del(rdev->mc.vram_mtrr);
}
void radeon_bo_list_add_object(struct radeon_bo_list *lobj,
struct list_head *head)
{
if (lobj->written) {
list_add(&lobj->tv.head, head);
} else {
list_add_tail(&lobj->tv.head, head);
}
}
int radeon_bo_list_validate(struct ww_acquire_ctx *ticket,
struct list_head *head, int ring)
{