From e47f4b61403f1f0eb950feb7c187c604f5cab990 Mon Sep 17 00:00:00 2001
From: Matt Roper <matthew.d.roper@intel.com>
Date: Fri, 12 Nov 2021 08:01:07 -0800
Subject: drm/i915: Don't read query SSEU for non-existent slice 0 on old
platforms
Git-commit: fac73543fff0ff23622c98879c66d069778c114a
Patch-mainline: v5.17-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
Pre-HSW platforms don't use the gt SSEU structures; this means that
calling intel_sseu_get_subslices() on slice 0 for these platforms will
trip a GEM_BUG_ON(slice >= sseu->max_slices) warning.
Let's move the DSS lookup for a DG2 workaround into a helper function
that will only get called after we've already decided that we're on a
DG2 platform.
Fixes: 645cc0b9d972 ("drm/i915/dg2: Add initial gt/ctx/engine workarounds")
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211112160107.1593906-1-matthew.d.roper@intel.com
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/i915/gt/intel_workarounds.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index 359cccfa36c5..78386210548a 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -2021,11 +2021,18 @@ engine_fake_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
CMD_CCTL_MOCS_OVERRIDE(mocs, mocs));
}
}
+
+static bool needs_wa_1308578152(struct intel_engine_cs *engine)
+{
+ u64 dss_mask = intel_sseu_get_subslices(&engine->gt->info.sseu, 0);
+
+ return (dss_mask & GENMASK(GEN_DSS_PER_GSLICE - 1, 0)) == 0;
+}
+
static void
rcs_engine_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
{
struct drm_i915_private *i915 = engine->i915;
- u64 dss_mask = intel_sseu_get_subslices(&engine->gt->info.sseu, 0);
if (IS_DG2_GRAPHICS_STEP(engine->i915, G11, STEP_A0, STEP_B0)) {
/* Wa_14013392000:dg2_g11 */
@@ -2059,7 +2066,7 @@ rcs_engine_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
/* Wa_1308578152:dg2_g10 when first gslice is fused off */
if (IS_DG2_GRAPHICS_STEP(engine->i915, G10, STEP_B0, STEP_C0) &&
- (dss_mask & GENMASK(GEN_DSS_PER_GSLICE - 1, 0)) == 0) {
+ needs_wa_1308578152(engine)) {
wa_masked_dis(wal, GEN12_CS_DEBUG_MODE1_CCCSUNIT_BE_COMMON,
GEN12_REPLAY_MODE_GRANULARITY);
}
--
2.38.1