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path: root/drivers/gpu/drm/radeon/radeon_mn.c
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Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_mn.c')
-rw-r--r--drivers/gpu/drm/radeon/radeon_mn.c22
1 files changed, 19 insertions, 3 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_mn.c b/drivers/gpu/drm/radeon/radeon_mn.c
index abd24975c9b1..f8b35df44c60 100644
--- a/drivers/gpu/drm/radeon/radeon_mn.c
+++ b/drivers/gpu/drm/radeon/radeon_mn.c
@@ -118,19 +118,27 @@ static void radeon_mn_release(struct mmu_notifier *mn,
* We block for all BOs between start and end to be idle and
* unmap them by move them into system domain again.
*/
-static void radeon_mn_invalidate_range_start(struct mmu_notifier *mn,
+static int radeon_mn_invalidate_range_start(struct mmu_notifier *mn,
struct mm_struct *mm,
unsigned long start,
- unsigned long end)
+ unsigned long end,
+ bool blockable)
{
struct radeon_mn *rmn = container_of(mn, struct radeon_mn, mn);
struct ttm_operation_ctx ctx = { false, false };
struct interval_tree_node *it;
+ int ret = 0;
/* notification is exclusive, but interval is inclusive */
end -= 1;
- mutex_lock(&rmn->lock);
+ /* TODO we should be able to split locking for interval tree and
+ * the tear down.
+ */
+ if (blockable)
+ mutex_lock(&rmn->lock);
+ else if (!mutex_trylock(&rmn->lock))
+ return -EAGAIN;
it = interval_tree_iter_first(&rmn->objects, start, end);
while (it) {
@@ -138,6 +146,11 @@ static void radeon_mn_invalidate_range_start(struct mmu_notifier *mn,
struct radeon_bo *bo;
long r;
+ if (!blockable) {
+ ret = -EAGAIN;
+ goto out_unlock;
+ }
+
node = container_of(it, struct radeon_mn_node, it);
it = interval_tree_iter_next(it, start, end);
@@ -166,7 +179,10 @@ static void radeon_mn_invalidate_range_start(struct mmu_notifier *mn,
}
}
+out_unlock:
mutex_unlock(&rmn->lock);
+
+ return ret;
}
static const struct mmu_notifier_ops radeon_mn_ops = {