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drm/panfrost: Align GEM objects GPU VA to 2MB 

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
This commit is contained in:
Rob Herring 2019-06-10 10:58:06 -06:00
parent 987d65d013
commit a0e93c41eb
1 changed files with 6 additions and 2 deletions
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8
drivers/gpu/drm/panfrost/panfrost_gem.c
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@ -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;