diff options
| 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_dma.c | |
| parent | 32fff610f7cf05260300f6c18700e9e0ac5910fb (diff) | |
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_dma.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_dma.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index 36c0cf131e93..4aa3db61a535 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -853,6 +853,10 @@ static void intel_device_info_runtime_init(struct drm_device *dev) else if (INTEL_INFO(dev)->gen >= 9) gen9_sseu_info_init(dev); + /* Snooping is broken on BXT A stepping. */ + info->has_snoop = !info->has_llc; + info->has_snoop &= !IS_BXT_REVID(dev, 0, BXT_REVID_A1); + DRM_DEBUG_DRIVER("slice total: %u\n", info->slice_total); DRM_DEBUG_DRIVER("subslice total: %u\n", info->subslice_total); DRM_DEBUG_DRIVER("subslice per slice: %u\n", info->subslice_per_slice); |