diff options
Diffstat (limited to 'drivers/gpu/drm/i915/gt/intel_engine_cs.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_engine_cs.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c index cbebe812b317..ce52030bf71d 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c +++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c @@ -213,6 +213,22 @@ __intel_engine_context_size(struct drm_i915_private *dev_priv, u8 class) return round_up(GEN6_CXT_TOTAL_SIZE(cxt_size) * 64, PAGE_SIZE); case 5: + /* + * There is a discrepancy here between the size reported + * by the register and the size of the context layout + * in the docs. Both are described as authorative! + * + * The discrepancy is on the order of a few cachelines, + * but the total is under one page (4k), which is our + * minimum allocation anyway so it should all come + * out in the wash. + */ + cxt_size = I915_READ(CXT_SIZE) + 1; + DRM_DEBUG_DRIVER("gen%d CXT_SIZE = %d bytes [0x%08x]\n", + INTEL_GEN(dev_priv), + cxt_size * 64, + cxt_size - 1); + return round_up(cxt_size * 64, PAGE_SIZE); case 4: case 3: case 2: |