From 6db40ec80f544e289fe836319b20fcc19a454e8d Mon Sep 17 00:00:00 2001
From: Stuart Summers <stuart.summers@intel.com>
Date: Fri, 23 Aug 2019 09:03:03 -0700
Subject: drm/i915: Use subslice stride to set subslices for a given slice
Git-commit: 6db40ec80f544e289fe836319b20fcc19a454e8d
Patch-mainline: v5.5-rc1
References: bsc#1152489
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 <stuart.summers@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190823160307.180813-8-stuart.summers@intel.com
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
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 3a5db0dbac72..1505042d7b5d 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 7f600f50dedb..73a9064291a2 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);
--
2.28.0