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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2017-01-05 18:30:23 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2017-01-05 18:34:46 +0300 |
| commit | db9309a526e5bb1418626d9b0d74f561230e0d10 (patch) | |
| tree | 9c7c782a15afff6a66711824513fcefb74b6f394 /drivers/gpu/drm/i915/intel_uc.h | |
| parent | 40b326eefe0ae89fa7e8b272f51382c55563e179 (diff) | |
| download | linux-db9309a526e5bb1418626d9b0d74f561230e0d10.tar.xz | |
drm/i915/guc: Exclude the upper end of the Global GTT for the GuC
The GuC uses a special mapping for the upper end of the Global GTT,
similar to the way it uses a special mapping for the lower end, so
exclude it from our drm_mm to prevent us using it.
v2: Rename to reflect that it is unmappable similar to the region at the
bottom of the GGTT, and couple it into the assertion that we don't feed
unmappable addresses to the GuC.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Reviewed-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170105153023.30575-5-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/intel_uc.h')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_uc.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_uc.h b/drivers/gpu/drm/i915/intel_uc.h index 3b1e39b0f3ab..9490a8e049c3 100644 --- a/drivers/gpu/drm/i915/intel_uc.h +++ b/drivers/gpu/drm/i915/intel_uc.h @@ -203,6 +203,7 @@ static inline u32 guc_ggtt_offset(struct i915_vma *vma) { u32 offset = i915_ggtt_offset(vma); GEM_BUG_ON(offset < GUC_WOPCM_TOP); + GEM_BUG_ON(range_overflows_t(u64, offset, vma->size, GUC_GGTT_TOP)); return offset; } |