[Intel-gfx] [CI 3/3] drm/i915/gt: Apply workaround 22016122933 correctly

[Andi Shyti]

From: Jonathan Cavitt <jonathan.cavitt at intel.com>

WA_22016122933 was recently applied to all MeteorLake engines, which is
simultaneously too broad (should only apply to Media engines) and too
specific (should apply to all platforms that use the same media engine
as MeteorLake).  Correct this in cases where coherency settings are
modified.

There were also two additional places where the workaround was applied
unconditionally.  The change was confirmed as necessary for all
platforms, so the workaround label was removed.

Suggested-by: Matt Roper <matthew.d.roper at intel.com>
Signed-off-by: Jonathan Cavitt <jonathan.cavitt at intel.com>
Acked-by: Fei Yang <fei.yang at intel.com>
Reviewed-by: Andi Shyti <andi.shyti at linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti at linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230801153242.2445478-4-jonathan.cavitt@intel.com
---
 drivers/gpu/drm/i915/gt/intel_gt.c        | 5 +++--
 drivers/gpu/drm/i915/gt/intel_gt.h        | 6 ++++++
 drivers/gpu/drm/i915/gt/intel_lrc.c       | 7 ++++---
 drivers/gpu/drm/i915/gt/uc/intel_gsc_fw.c | 4 ----
 drivers/gpu/drm/i915/gt/uc/intel_guc.c    | 7 ++++---
 drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c | 4 ----
 6 files changed, 17 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c
index 91829f1f07064..d234122f80242 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt.c
@@ -1009,9 +1009,10 @@ enum i915_map_type intel_gt_coherent_map_type(struct intel_gt *gt,
 					      bool always_coherent)
 {
 	/*
-	 * Wa_22016122933: always return I915_MAP_WC for MTL
+	 * Wa_22016122933: always return I915_MAP_WC for Media
+	 * version 13.0 when the object is on the Media GT
 	 */
-	if (i915_gem_object_is_lmem(obj) || IS_METEORLAKE(gt->i915))
+	if (i915_gem_object_is_lmem(obj) || intel_gt_needs_wa_22016122933(gt))
 		return I915_MAP_WC;
 	if (HAS_LLC(gt->i915) || always_coherent)
 		return I915_MAP_WB;
diff --git a/drivers/gpu/drm/i915/gt/intel_gt.h b/drivers/gpu/drm/i915/gt/intel_gt.h
index 2fea789d6aa13..6c34547b58b59 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt.h
@@ -6,6 +6,7 @@
 #ifndef __INTEL_GT__
 #define __INTEL_GT__
 
+#include "i915_drv.h"
 #include "intel_engine_types.h"
 #include "intel_gt_types.h"
 #include "intel_reset.h"
@@ -24,6 +25,11 @@ static inline bool gt_is_root(struct intel_gt *gt)
 	return !gt->info.id;
 }
 
+static inline bool intel_gt_needs_wa_22016122933(struct intel_gt *gt)
+{
+	return MEDIA_VER_FULL(gt->i915) == IP_VER(13, 0) && gt->type == GT_MEDIA;
+}
+
 static inline struct intel_gt *uc_to_gt(struct intel_uc *uc)
 {
 	return container_of(uc, struct intel_gt, uc);
diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
index 339b02762bf91..957d0aeb0c022 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -1095,10 +1095,11 @@ __lrc_alloc_state(struct intel_context *ce, struct intel_engine_cs *engine)
 	if (IS_ERR(obj)) {
 		obj = i915_gem_object_create_shmem(engine->i915, context_size);
 		/*
-		 * Wa_22016122933: For MTL the shared memory needs to be mapped
-		 * as WC on CPU side and UC (PAT index 2) on GPU side
+		 * Wa_22016122933: For Media version 13.0, all Media GT shared
+		 * memory needs to be mapped as WC on CPU side and UC (PAT
+		 * index 2) on GPU side.
 		 */
-		if (IS_METEORLAKE(engine->i915))
+		if (intel_gt_needs_wa_22016122933(engine->gt))
 			i915_gem_object_set_cache_coherency(obj, I915_CACHE_NONE);
 	}
 	if (IS_ERR(obj))
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_gsc_fw.c b/drivers/gpu/drm/i915/gt/uc/intel_gsc_fw.c
index f5381c1eb7794..e2e42b3e0d5d8 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_gsc_fw.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_gsc_fw.c
@@ -298,10 +298,6 @@ static int gsc_fw_load_prepare(struct intel_gsc_uc *gsc)
 	memcpy_toio(gsc->local_vaddr, src, gsc->fw.size);
 	memset_io(gsc->local_vaddr + gsc->fw.size, 0, gsc->local->size - gsc->fw.size);
 
-	/*
-	 * Wa_22016122933: Making sure the data in dst is
-	 * visible to GSC right away
-	 */
 	intel_guc_write_barrier(&gt->uc.guc);
 
 	i915_gem_object_unpin_map(gsc->fw.obj);
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
index 6c072f100c9b6..569b5fe94c416 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
@@ -745,10 +745,11 @@ struct i915_vma *intel_guc_allocate_vma(struct intel_guc *guc, u32 size)
 		return ERR_CAST(obj);
 
 	/*
-	 * Wa_22016122933: For MTL the shared memory needs to be mapped
-	 * as WC on CPU side and UC (PAT index 2) on GPU side
+	 * Wa_22016122933: For Media version 13.0, all Media GT shared
+	 * memory needs to be mapped as WC on CPU side and UC (PAT
+	 * index 2) on GPU side.
 	 */
-	if (IS_METEORLAKE(gt->i915))
+	if (intel_gt_needs_wa_22016122933(gt))
 		i915_gem_object_set_cache_coherency(obj, I915_CACHE_NONE);
 
 	vma = i915_vma_instance(obj, &gt->ggtt->vm, NULL);
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c
index f28a3a83742dc..97eadd08181d6 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c
@@ -960,10 +960,6 @@ static int ct_read(struct intel_guc_ct *ct, struct ct_incoming_msg **msg)
 	/* now update descriptor */
 	WRITE_ONCE(desc->head, head);
 
-	/*
-	 * Wa_22016122933: Making sure the head update is
-	 * visible to GuC right away
-	 */
 	intel_guc_write_barrier(ct_to_guc(ct));
 
 	return available - len;
-- 
2.40.1