[Intel-gfx] [PATCH] drm/i915: Extend debugfs/i915_drop_caches to call i915_gem_shrink_all()

[Chris Wilson]

Sometimes we want to explicitly page out all available objects from igt,
i.e. call i915_gem_shrink_all() and check that subsequent operations
succeed. This adds DROP_SHRINK_ALL [0x8] to the set of flags for
debugfs/i915_drop_caches.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 3a2ef08ed3a1..d301119378e5 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -4210,11 +4210,13 @@ DEFINE_SIMPLE_ATTRIBUTE(i915_ring_test_irq_fops,
 #define DROP_RETIRE 0x4
 #define DROP_ACTIVE 0x8
 #define DROP_FREED 0x10
+#define DROP_SHRINK_ALL 0x20
 #define DROP_ALL (DROP_UNBOUND	| \
 		  DROP_BOUND	| \
 		  DROP_RETIRE	| \
 		  DROP_ACTIVE	| \
-		  DROP_FREED)
+		  DROP_FREED	| \
+		  DROP_SHRINK_ALL)
 static int
 i915_drop_caches_get(void *data, u64 *val)
 {
@@ -4255,6 +4257,9 @@ i915_drop_caches_set(void *data, u64 val)
 	if (val & DROP_UNBOUND)
 		i915_gem_shrink(dev_priv, LONG_MAX, I915_SHRINK_UNBOUND);
 
+	if (val & DROP_SHRINK_ALL)
+		i915_gem_shrink_all(dev_priv);
+
 unlock:
 	mutex_unlock(&dev->struct_mutex);
 
-- 
2.11.0