Re: [PATCH 06/19] drm/i915/stolen: pass the allocation flags

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On 12/04/2021 10:05, Matthew Auld wrote:
From: CQ Tang <cq.tang@xxxxxxxxx>

Stolen memory is always allocated as physically contiguous pages, mark
the object flags as such.

Signed-off-by: CQ Tang <cq.tang@xxxxxxxxx>
Signed-off-by: Matthew Auld <matthew.auld@xxxxxxxxx>
---
  drivers/gpu/drm/i915/gem/i915_gem_stolen.c | 10 ++++++----
  1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_stolen.c b/drivers/gpu/drm/i915/gem/i915_gem_stolen.c
index f713eabb7671..49a2dfcc8ba7 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_stolen.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_stolen.c
@@ -633,14 +633,15 @@ static const struct drm_i915_gem_object_ops i915_gem_object_stolen_ops = {
static int __i915_gem_object_create_stolen(struct intel_memory_region *mem,
  					   struct drm_i915_gem_object *obj,
-					   struct drm_mm_node *stolen)
+					   struct drm_mm_node *stolen,
+					   unsigned int flags)
  {
  	static struct lock_class_key lock_class;
  	unsigned int cache_level;
  	int err;
drm_gem_private_object_init(&mem->i915->drm, &obj->base, stolen->size);
-	i915_gem_object_init(obj, &i915_gem_object_stolen_ops, &lock_class, 0);
+	i915_gem_object_init(obj, &i915_gem_object_stolen_ops, &lock_class, flags);
obj->stolen = stolen;
  	obj->read_domains = I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT;
@@ -682,7 +683,7 @@ static int _i915_gem_object_stolen_init(struct intel_memory_region *mem,
  	if (ret)
  		goto err_free;
- ret = __i915_gem_object_create_stolen(mem, obj, stolen);
+	ret = __i915_gem_object_create_stolen(mem, obj, stolen, flags);
  	if (ret)
  		goto err_remove;
@@ -840,7 +841,8 @@ i915_gem_object_create_stolen_for_preallocated(struct drm_i915_private *i915,
  		goto err_stolen;
  	}
- ret = __i915_gem_object_create_stolen(mem, obj, stolen);
+	ret = __i915_gem_object_create_stolen(mem, obj, stolen,
+					      I915_BO_ALLOC_CONTIGUOUS);
  	if (ret)
  		goto err_object_free;

Are all stolen objects always contiguous or only ones allocated by i915_gem_object_create_stolen_for_preallocated? If former should __i915_gem_object_create_stolen just set the flag without the need to pass it in?

Regards,

Tvrtko
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