Currently, the subslice_mask runtime parameter is stored as an
array of subslices per slice. Expand the subslice mask array to
better match what is presented to userspace through the
I915_QUERY_TOPOLOGY_INFO ioctl. The index into this array is
then calculated:
slice * subslice stride + subslice index / 8
v2: Fix 32-bit build
v3: Fix typo on haswell and update SSEU workaround to correctly
print subslice mask on error.
Signed-off-by: Stuart Summers <stuart.summers@xxxxxxxxx>
---
drivers/gpu/drm/i915/gt/intel_sseu.c | 27 ++++++++++++++++++++-
drivers/gpu/drm/i915/gt/intel_sseu.h | 5 +++-
drivers/gpu/drm/i915/gt/intel_workarounds.c | 5 ++--
drivers/gpu/drm/i915/i915_debugfs.c | 5 +++-
drivers/gpu/drm/i915/intel_device_info.c | 8 +++---
5 files changed, 40 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_sseu.c b/drivers/gpu/drm/i915/gt/intel_sseu.c
index 607c1447287c..e426f34b4dd6 100644
--- a/drivers/gpu/drm/i915/gt/intel_sseu.c
+++ b/drivers/gpu/drm/i915/gt/intel_sseu.c
@@ -30,6 +30,31 @@ intel_sseu_subslice_total(const struct sseu_dev_info *sseu)
return total;
}
+u32 intel_sseu_get_subslices(const struct sseu_dev_info *sseu, u8 slice)
+{
+ int i, offset = slice * sseu->ss_stride;
+ u32 mask = 0;
+
+ if (slice >= sseu->max_slices) {
+ DRM_ERROR("%s: invalid slice %d, max: %d\n",
+ __func__, slice, sseu->max_slices);
+ return 0;
+ }
+
+ if (sseu->ss_stride > sizeof(mask)) {
+ DRM_ERROR("%s: invalid subslice stride %d, max: %u\n",
+ __func__, sseu->ss_stride,
+ (unsigned int)sizeof(mask));
+ return 0;
+ }
+
+ for (i = 0; i < sseu->ss_stride; i++)
+ mask |= (u32)sseu->subslice_mask[offset + i] <<
+ i * BITS_PER_BYTE;
+
+ return mask;
+}
+
void intel_sseu_set_subslices(struct sseu_dev_info *sseu, int slice,
u32 ss_mask)
{
@@ -43,7 +68,7 @@ void intel_sseu_set_subslices(struct sseu_dev_info *sseu, int slice,
unsigned int
intel_sseu_subslices_per_slice(const struct sseu_dev_info *sseu, u8 slice)
{
- return hweight8(sseu->subslice_mask[slice]);
+ return hweight32(intel_sseu_get_subslices(sseu, slice));
}
u32 intel_sseu_make_rpcs(struct drm_i915_private *i915,
diff --git a/drivers/gpu/drm/i915/gt/intel_sseu.h b/drivers/gpu/drm/i915/gt/intel_sseu.h
index 0ecc1c35a7a1..2291764b7db5 100644
--- a/drivers/gpu/drm/i915/gt/intel_sseu.h
+++ b/drivers/gpu/drm/i915/gt/intel_sseu.h
@@ -15,10 +15,11 @@ struct drm_i915_private;
#define GEN_MAX_SLICES (6) /* CNL upper bound */
#define GEN_MAX_SUBSLICES (8) /* ICL upper bound */
#define GEN_SSEU_STRIDE(max_entries) DIV_ROUND_UP(max_entries, BITS_PER_BYTE)
+#define GEN_MAX_SUBSLICE_STRIDE GEN_SSEU_STRIDE(GEN_MAX_SUBSLICES)
struct sseu_dev_info {
u8 slice_mask;
- u8 subslice_mask[GEN_MAX_SLICES];
+ u8 subslice_mask[GEN_MAX_SLICES * GEN_MAX_SUBSLICE_STRIDE];
u16 eu_total;
u8 eu_per_subslice;
u8 min_eu_in_pool;
@@ -85,6 +86,8 @@ intel_sseu_subslice_total(const struct sseu_dev_info *sseu);
unsigned int
intel_sseu_subslices_per_slice(const struct sseu_dev_info *sseu, u8 slice);
+u32 intel_sseu_get_subslices(const struct sseu_dev_info *sseu, u8 slice);
+
void intel_sseu_set_subslices(struct sseu_dev_info *sseu, int slice,
u32 ss_mask);
diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index 704ace01e7f5..5bfae7f71b83 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -794,11 +794,10 @@ wa_init_mcr(struct drm_i915_private *i915, struct i915_wa_list *wal)
}
slice = fls(sseu->slice_mask) - 1;
- GEM_BUG_ON(slice >= ARRAY_SIZE(sseu->subslice_mask));
- subslice = fls(l3_en & sseu->subslice_mask[slice]);
+ subslice = fls(l3_en & intel_sseu_get_subslices(sseu, slice));
if (!subslice) {
DRM_WARN("No common index found between subslice mask %x and L3 bank mask %x!\n",
- sseu->subslice_mask[slice], l3_en);
+ intel_sseu_get_subslices(sseu, slice), l3_en);
subslice = fls(l3_en);
WARN_ON(!subslice);
}
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 083767a985ef..8666ce5166b4 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -3949,13 +3949,16 @@ static void gen9_sseu_device_status(struct drm_i915_private *dev_priv,
for (ss = 0; ss < info->sseu.max_subslices; ss++) {
unsigned int eu_cnt;
+ u8 ss_idx = s * info->sseu.ss_stride +
+ ss / BITS_PER_BYTE;
if (IS_GEN9_LP(dev_priv)) {
if (!(s_reg[s] & (GEN9_PGCTL_SS_ACK(ss))))
/* skip disabled subslice */
continue;
- sseu->subslice_mask[s] |= BIT(ss);
+ sseu->subslice_mask[ss_idx] |=
+ BIT(ss % BITS_PER_BYTE);
}
eu_cnt = 2 * hweight32(eu_reg[2*s + ss/2] &
diff --git a/drivers/gpu/drm/i915/intel_device_info.c b/drivers/gpu/drm/i915/intel_device_info.c
index 66fe68875d1b..7fe3afd0a738 100644
--- a/drivers/gpu/drm/i915/intel_device_info.c
+++ b/drivers/gpu/drm/i915/intel_device_info.c
@@ -93,9 +93,9 @@ static void sseu_dump(const struct sseu_dev_info *sseu, struct drm_printer *p)
hweight8(sseu->slice_mask), sseu->slice_mask);
drm_printf(p, "subslice total: %u\n", intel_sseu_subslice_total(sseu));
for (s = 0; s < sseu->max_slices; s++) {
- drm_printf(p, "slice%d: %u subslices, mask=%04x\n",
+ drm_printf(p, "slice%d: %u subslices, mask=%08x\n",
s, intel_sseu_subslices_per_slice(sseu, s),
- sseu->subslice_mask[s]);
+ intel_sseu_get_subslices(sseu, s));
}
drm_printf(p, "EU total: %u\n", sseu->eu_total);
drm_printf(p, "EU per subslice: %u\n", sseu->eu_per_subslice);
@@ -159,9 +159,9 @@ void intel_device_info_dump_topology(const struct sseu_dev_info *sseu,
}
for (s = 0; s < sseu->max_slices; s++) {
- drm_printf(p, "slice%d: %u subslice(s) (0x%hhx):\n",
+ drm_printf(p, "slice%d: %u subslice(s) (0x%08x):\n",
s, intel_sseu_subslices_per_slice(sseu, s),
- sseu->subslice_mask[s]);
+ intel_sseu_get_subslices(sseu, s));
for (ss = 0; ss < sseu->max_subslices; ss++) {
u16 enabled_eus = sseu_get_eus(sseu, s, ss);
--
2.21.0.5.gaeb582a983
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