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drm/i915/gem: Early rejection of no-aperture map_ggtt

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If the device does not have an aperture through which we can indirectly
access and detile the buffers, simply reject the ioctl. Later we can
extend the ioctl to support different modes, but as an extension the
user must opt in and explicitly control the mmap type (viz
MMAP_OFFSET_IOCTL).

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191105145305.14314-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2019-11-05 14:53:05 +00:00
parent a096883dda
commit bee0a70a9e
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/i915/gem/i915_gem_mman.c
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@ -450,6 +450,9 @@ i915_gem_mmap_gtt(struct drm_file *file,
struct drm_i915_gem_object *obj;
int ret;
if (!i915_ggtt_has_aperture(&to_i915(dev)->ggtt))
return -ENODEV;
obj = i915_gem_object_lookup(file, handle);
if (!obj)
return -ENOENT;