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| author |   Tvrtko Ursulin <tvrtko.ursulin@intel.com> | 2016-03-02 12:10:31 +0000 |
|---|---|---|
| committer | Tvrtko Ursulin <tvrtko.ursulin@intel.com> | 2016-03-02 13:46:21 +0000 |
| commit | ca377809d657ea3ba249e97d073a7373e383ab6a (patch) | |
| tree | 85e5ddd7d1165277645b4925c6cb96d415180dc5 /drivers/gpu/drm/i915/i915_gem_userptr.c | |
| parent | drm/i915: Do not return unknown status when load detection is tested. (diff) | |
| download | linux-dev-ca377809d657ea3ba249e97d073a7373e383ab6a.tar.xz linux-dev-ca377809d657ea3ba249e97d073a7373e383ab6a.zip | |
drm/i915: Avoid snooping with userptr where not supported
commit e5756c10d841ddb448293c849392f3d6b809561f
Author: Imre Deak <imre.deak@intel.com>
Date: Fri Aug 14 18:43:30 2015 +0300
drm/i915/bxt: don't allow cached GEM mappings on A stepping
Added an exception of disallowing snooping for Broxton A
stepping hardware but userptr was still enabling it regardless.
Move the check to HAS_SNOOP now that it is used from multiple
call sites and use it.
v2: Userptr cannot be supported when it cannot be coherent and
generalize the code better. (Chris Wilson)
v3: Make has_snoop true only when !has_llc. (Chris Wilson)
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Imre Deak <imre.deak@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1456920631-34302-1-git-send-email-tvrtko.ursulin@linux.intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_userptr.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_userptr.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_userptr.c b/drivers/gpu/drm/i915/i915_gem_userptr.c index 4b09c840d493..54088a4d6498 100644 --- a/drivers/gpu/drm/i915/i915_gem_userptr.c +++ b/drivers/gpu/drm/i915/i915_gem_userptr.c @@ -758,6 +758,13 @@ i915_gem_userptr_ioctl(struct drm_device *dev, void *data, struct drm_file *file int ret; u32 handle; + if (!HAS_LLC(dev) && !HAS_SNOOP(dev)) { + /* We cannot support coherent userptr objects on hw without + * LLC and broken snooping. + */ + return -ENODEV; + } + if (args->flags & ~(I915_USERPTR_READ_ONLY | I915_USERPTR_UNSYNCHRONIZED)) return -EINVAL; |