From 6db40ec80f544e289fe836319b20fcc19a454e8d Mon Sep 17 00:00:00 2001 From: Stuart Summers Date: Fri, 23 Aug 2019 09:03:03 -0700 Subject: [PATCH] drm/i915: Use subslice stride to set subslices for a given slice Add a subslice stride calculation when setting subslices. This aligns more closely with the userspace expectation of the subslice mask structure. v2: Use local variable for subslice_mask on HSW and clean up a few other subslice_mask local variable changes v3: Add GEM_BUG_ON for ss_stride to prevent array overflow (Chris) Split main set function and refactors in intel_device_info.c into separate patches (Chris) v4: Reduce ss_stride size check when setting subslices per slice based on actual expected max stride (Chris) Move that GEM_BUG_ON check for the ss_stride out to the patch which adds the ss_stride v5: Use memcpy instead of looping through each stride index Signed-off-by: Stuart Summers Reviewed-by: Chris Wilson Signed-off-by: Chris Wilson Link: https://patchwork.freedesktop.org/patch/msgid/20190823160307.180813-8-stuart.summers@intel.com --- drivers/gpu/drm/i915/gt/intel_sseu.c | 6 ++++-- drivers/gpu/drm/i915/gt/intel_sseu.h | 2 +- 2 files changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/gt/intel_sseu.c b/drivers/gpu/drm/i915/gt/intel_sseu.c index 3a5db0d..1505042 100644 --- a/drivers/gpu/drm/i915/gt/intel_sseu.c +++ b/drivers/gpu/drm/i915/gt/intel_sseu.c @@ -33,9 +33,11 @@ intel_sseu_subslice_total(const struct sseu_dev_info *sseu) } void intel_sseu_set_subslices(struct sseu_dev_info *sseu, int slice, - u8 ss_mask) + u32 ss_mask) { - sseu->subslice_mask[slice] = ss_mask; + int offset = slice * sseu->ss_stride; + + memcpy(&sseu->subslice_mask[offset], &ss_mask, sseu->ss_stride); } unsigned int diff --git a/drivers/gpu/drm/i915/gt/intel_sseu.h b/drivers/gpu/drm/i915/gt/intel_sseu.h index 7f600f5..73a9064 100644 --- a/drivers/gpu/drm/i915/gt/intel_sseu.h +++ b/drivers/gpu/drm/i915/gt/intel_sseu.h @@ -79,7 +79,7 @@ unsigned int intel_sseu_subslices_per_slice(const struct sseu_dev_info *sseu, u8 slice); void intel_sseu_set_subslices(struct sseu_dev_info *sseu, int slice, - u8 ss_mask); + u32 ss_mask); u32 intel_sseu_make_rpcs(struct drm_i915_private *i915, const struct intel_sseu *req_sseu); -- 2.7.4