[PATCH] drm/i915/gt: Limit the reserved VM space to only the platforms that need it

[Andi Shyti]

Commit 9bb66c179f50 ("drm/i915: Reserve some kernel space per
vm") reduces the available VM space of one page in order to apply
Wa_16018031267 and Wa_16018063123.

This page was reserved indiscrimitely in all platforms even when
not needed. Limit it to DG2 onwards.

Fixes: 9bb66c179f50 ("drm/i915: Reserve some kernel space per vm")
Signed-off-by: Andi Shyti <andi.shyti at linux.intel.com>
Cc: Andrzej Hajda <andrzej.hajda at intel.com>
Cc: Chris Wilson <chris.p.wilson at linux.intel.com>
Cc: Jonathan Cavitt <jonathan.cavitt at intel.com>
Cc: Nirmoy Das <nirmoy.das at intel.com>
---
 drivers/gpu/drm/i915/gt/gen8_ppgtt.c | 3 +++
 drivers/gpu/drm/i915/gt/intel_gt.c   | 6 ++++++
 drivers/gpu/drm/i915/gt/intel_gt.h   | 9 +++++----
 3 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/gen8_ppgtt.c b/drivers/gpu/drm/i915/gt/gen8_ppgtt.c
index 1bd0e041e15c..398d60a66410 100644
--- a/drivers/gpu/drm/i915/gt/gen8_ppgtt.c
+++ b/drivers/gpu/drm/i915/gt/gen8_ppgtt.c
@@ -961,6 +961,9 @@ static int gen8_init_rsvd(struct i915_address_space *vm)
 	struct i915_vma *vma;
 	int ret;
 
+	if (!intel_gt_needs_wa_16018031267(vm->gt))
+		return 0;
+
 	/* The memory will be used only by GPU. */
 	obj = i915_gem_object_create_lmem(i915, PAGE_SIZE,
 					  I915_BO_ALLOC_VOLATILE |
diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c
index 2c6d31b8fc1a..580b5141ce1e 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt.c
@@ -1024,6 +1024,12 @@ enum i915_map_type intel_gt_coherent_map_type(struct intel_gt *gt,
 		return I915_MAP_WC;
 }
 
+bool intel_gt_needs_wa_16018031267(struct intel_gt *gt)
+{
+	/* Wa_16018031267, Wa_16018063123 */
+	return IS_GFX_GT_IP_RANGE(gt, IP_VER(12, 55), IP_VER(12, 71));
+}
+
 bool intel_gt_needs_wa_22016122933(struct intel_gt *gt)
 {
 	return MEDIA_VER_FULL(gt->i915) == IP_VER(13, 0) && gt->type == GT_MEDIA;
diff --git a/drivers/gpu/drm/i915/gt/intel_gt.h b/drivers/gpu/drm/i915/gt/intel_gt.h
index 6e7cab60834c..b5e114d284ad 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt.h
@@ -82,17 +82,18 @@ struct drm_printer;
 		  ##__VA_ARGS__);					\
 } while (0)
 
-#define NEEDS_FASTCOLOR_BLT_WABB(engine) ( \
-	IS_GFX_GT_IP_RANGE(engine->gt, IP_VER(12, 55), IP_VER(12, 71)) && \
-	engine->class == COPY_ENGINE_CLASS && engine->instance == 0)
-
 static inline bool gt_is_root(struct intel_gt *gt)
 {
 	return !gt->info.id;
 }
 
+bool intel_gt_needs_wa_16018031267(struct intel_gt *gt);
 bool intel_gt_needs_wa_22016122933(struct intel_gt *gt);
 
+#define NEEDS_FASTCOLOR_BLT_WABB(engine) ( \
+	intel_gt_needs_wa_16018031267(engine->gt) && \
+	engine->class == COPY_ENGINE_CLASS && engine->instance == 0)
+
 static inline struct intel_gt *uc_to_gt(struct intel_uc *uc)
 {
 	return container_of(uc, struct intel_gt, uc);
-- 
2.43.0