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drm/qxl: Acquire reservation lock in GEM pin/unpin callbacks

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Acquire the reservation lock directly in GEM pin callback. Same for
unpin. Prepares for further changes.

Dma-buf locking semantics require callers to hold the buffer's
reservation lock when invoking the pin and unpin callbacks. Prepare
qxl accordingly by pushing locking out of the implementation. A
follow-up patch will fix locking for all GEM code at once.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com> # virtio-gpu
Acked-by: Christian König <christian.koenig@amd.com>
Acked-by: Zack Rusin <zack.rusin@broadcom.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240227113853.8464-9-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2024-02-27 11:14:55 +01:00
parent b170783a8f
commit 9456742020
1 changed files with 14 additions and 2 deletions
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16
drivers/gpu/drm/qxl/qxl_prime.c
View file

@ -31,15 +31,27 @@
int qxl_gem_prime_pin(struct drm_gem_object *obj)
{
struct qxl_bo *bo = gem_to_qxl_bo(obj);
int r;
return qxl_bo_pin(bo);
r = qxl_bo_reserve(bo);
if (r)
return r;
r = qxl_bo_pin_locked(bo);
qxl_bo_unreserve(bo);
return r;
}
void qxl_gem_prime_unpin(struct drm_gem_object *obj)
{
struct qxl_bo *bo = gem_to_qxl_bo(obj);
int r;
qxl_bo_unpin(bo);
r = qxl_bo_reserve(bo);
if (r)
return;
qxl_bo_unpin_locked(bo);
qxl_bo_unreserve(bo);
}
struct sg_table *qxl_gem_prime_get_sg_table(struct drm_gem_object *obj)