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drm/i915: Add new function to copy subslices for a slice

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Add a new function to copy subslices for a specified slice
between intel_sseu structures for the purpose of determining
power-gate status. Note that currently ss_stride has a max
of 1.

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/20190823160307.180813-11-stuart.summers@intel.com
This commit is contained in:
Stuart Summers 2019-08-23 09:03:06 -07:00 committed by Chris Wilson
parent eaef5b3c41
commit 668df17f59
1 changed files with 14 additions and 3 deletions
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17
drivers/gpu/drm/i915/i915_debugfs.c
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@ -3726,6 +3726,15 @@ i915_cache_sharing_set(void *data, u64 val)
return 0;
}
static void
intel_sseu_copy_subslices(const struct sseu_dev_info *sseu, int slice,
u8 *to_mask)
{
int offset = slice * sseu->ss_stride;
memcpy(&to_mask[offset], &sseu->subslice_mask[offset], sseu->ss_stride);
}
DEFINE_SIMPLE_ATTRIBUTE(i915_cache_sharing_fops,
i915_cache_sharing_get, i915_cache_sharing_set,
"%llu\n");
@ -3799,7 +3808,7 @@ static void gen10_sseu_device_status(struct drm_i915_private *dev_priv,
continue;
sseu->slice_mask |= BIT(s);
sseu->subslice_mask[s] = info->sseu.subslice_mask[s];
intel_sseu_copy_subslices(&info->sseu, s, sseu->subslice_mask);
for (ss = 0; ss < info->sseu.max_subslices; ss++) {
unsigned int eu_cnt;
@ -3850,7 +3859,8 @@ static void gen9_sseu_device_status(struct drm_i915_private *dev_priv,
sseu->slice_mask |= BIT(s);
if (IS_GEN9_BC(dev_priv))
sseu->subslice_mask[s] = info->sseu.subslice_mask[s];
intel_sseu_copy_subslices(&info->sseu, s,
sseu->subslice_mask);
for (ss = 0; ss < info->sseu.max_subslices; ss++) {
unsigned int eu_cnt;
@ -3886,7 +3896,8 @@ static void broadwell_sseu_device_status(struct drm_i915_private *dev_priv,
if (sseu->slice_mask) {
sseu->eu_per_subslice = info->sseu.eu_per_subslice;
for (s = 0; s < fls(sseu->slice_mask); s++)
sseu->subslice_mask[s] = info->sseu.subslice_mask[s];
intel_sseu_copy_subslices(&info->sseu, s,
sseu->subslice_mask);
sseu->eu_total = sseu->eu_per_subslice *
intel_sseu_subslice_total(sseu);