[Intel-gfx] [PATCH 1/2] drm/i915/gt: Restore both GGTT bindings on resume

Chris Wilson chris at chris-wilson.co.uk
Thu May 28 08:24:26 UTC 2020

We should be able to skip restoing LOCAL (user) binds within the GGTT on
resume and let them be restored upon demand. However, our consistency
checks demand that the bind flags match the node state, and we cannot
simply clear the flags we need to evict as well. For now, make sure we
restore the bind flags exactly upon resume.

Fixes: 0109a16ef391 ("drm/i915/gt: Clear LOCAL_BIND from shared GGTT on resume")
Fixes: bf0840cdb304 ("drm/i915/gt: Stop cross-polluting PIN_GLOBAL with PIN_USER with no-ppgtt")
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
 drivers/gpu/drm/i915/gt/intel_ggtt.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_ggtt.c b/drivers/gpu/drm/i915/gt/intel_ggtt.c
index 317172ad5ef3..ffe285b0b3bd 100644
--- a/drivers/gpu/drm/i915/gt/intel_ggtt.c
+++ b/drivers/gpu/drm/i915/gt/intel_ggtt.c
@@ -1183,13 +1183,11 @@ void i915_ggtt_resume(struct i915_ggtt *ggtt)
 	/* clflush objects bound into the GGTT and rebind them. */
 	list_for_each_entry(vma, &ggtt->vm.bound_list, vm_link) {
 		struct drm_i915_gem_object *obj = vma->obj;
-		if (!(clear_bind(vma) & I915_VMA_GLOBAL_BIND))
-			continue;
+		unsigned int was_bound = clear_bind(vma);
 				      obj ? obj->cache_level : 0,
-				      PIN_GLOBAL, NULL));
+				      was_bound, NULL));
 		if (obj) { /* only used during resume => exclusive access */
 			flush |= fetch_and_zero(&obj->write_domain);
 			obj->read_domains |= I915_GEM_DOMAIN_GTT;

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