drm/panfrost: Align GEM objects GPU VA to 2MB (a0e93c41) · Commits · 戴 / test

In order to increase the chances of using 2MB pages, we need to align the GPU VA mapping to 2MB. Only do this if the object size is 2MB or more. Cc: Robin Murphy <robin.murphy@arm.com> Cc: Steven Price <steven.price@arm.com> Cc: Tomeu Vizoso <tomeu.vizoso@collabora.com> Signed-off-by:

Rob Herring <robh@kernel.org> Reviewed-by:

Tomeu Vizoso <tomeu.vizoso@collabora.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190610165806.24854-1-robh@kernel.org

drivers/gpu/drm/panfrost/panfrost_gem.c

+6 −2

Original line number	Diff line number	Diff line
		@@ -52,6 +52,7 @@ struct drm_gem_object panfrost_gem_create_object(struct drm_device dev, size_t
		int ret;
		struct panfrost_device *pfdev = dev->dev_private;
		struct panfrost_gem_object *obj;
		u64 align;

		obj = kzalloc(sizeof(*obj), GFP_KERNEL);
		if (!obj)
		@@ -59,9 +60,12 @@ struct drm_gem_object panfrost_gem_create_object(struct drm_device dev, size_t

		obj->base.base.funcs = &panfrost_gem_funcs;

		size = roundup(size, PAGE_SIZE);
		align = size >= SZ_2M ? SZ_2M >> PAGE_SHIFT : 0;

		spin_lock(&pfdev->mm_lock);
		ret = drm_mm_insert_node(&pfdev->mm, &obj->node,
		roundup(size, PAGE_SIZE) >> PAGE_SHIFT);
		ret = drm_mm_insert_node_generic(&pfdev->mm, &obj->node,
		size >> PAGE_SHIFT, align, 0, 0);
		spin_unlock(&pfdev->mm_lock);
		if (ret)
		goto free_obj;

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