diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2017-01-12 13:04:31 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2017-01-12 16:47:04 +0000 |
| commit | fcd46e53449c4d659ffbedcd2823ea2f73e39927 (patch) | |
| tree | dd25d4584f71b38b204ca7a81c85414f5fe9ccd5 | |
| parent | 7c3f86b6dc51b38ee30aaac00cdf39d20b2e7b38 (diff) | |
drm/i915: Declare i915_gem_object_create_internal() as taking phys_addr_t size
The internal object is a collection of struct pages and so is
intrinsically linked to the available physical memory on the machine,
and not an arbitrary type from the uabi. Use phys_addr_t so the link
between size and memory consumption is clear, and then double check that
we don't overflow the maximum object size.
v2: Also assert that size is not zero - a mistake I made a few times
while writing selftests.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170112130431.1844-1-chris@chris-wilson.co.uk
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.h | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_internal.c | 7 |
2 files changed, 7 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index e9b4ece689d0..234c5890134f 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -3505,7 +3505,7 @@ i915_gem_object_create_stolen_for_preallocated(struct drm_i915_private *dev_priv /* i915_gem_internal.c */ struct drm_i915_gem_object * i915_gem_object_create_internal(struct drm_i915_private *dev_priv, - unsigned int size); + phys_addr_t size); /* i915_gem_shrinker.c */ unsigned long i915_gem_shrink(struct drm_i915_private *dev_priv, diff --git a/drivers/gpu/drm/i915/i915_gem_internal.c b/drivers/gpu/drm/i915/i915_gem_internal.c index 2222863e505f..9b39472396ef 100644 --- a/drivers/gpu/drm/i915/i915_gem_internal.c +++ b/drivers/gpu/drm/i915/i915_gem_internal.c @@ -151,10 +151,15 @@ static const struct drm_i915_gem_object_ops i915_gem_object_internal_ops = { */ struct drm_i915_gem_object * i915_gem_object_create_internal(struct drm_i915_private *i915, - unsigned int size) + phys_addr_t size) { struct drm_i915_gem_object *obj; + GEM_BUG_ON(!size); + + if (overflows_type(size, obj->base.size)) + return ERR_PTR(-E2BIG); + obj = i915_gem_object_alloc(i915); if (!obj) return ERR_PTR(-ENOMEM); |