drm/i915/gt: Use hw_engine_masks as reset_domains

We need a way to reset engines by their reset domains.
This change sets up way to fetch reset domains of each
engine globally.

Changes since V1:
	- Use static reset domain array - Ville and Tvrtko
	- Use BUG_ON at appropriate place - Tvrtko

Signed-off-by: Tejas Upadhyay <[email protected]>
Reviewed-by: Rodrigo Vivi <[email protected]>
Signed-off-by: Rodrigo Vivi <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/20211206081026.4024401-1-tejaskumarx.surendrakumar.upadhyay@intel.com

Author: tejaskux

drivers/gpu/drm/i915/gt/intel_engine_cs.c

@@ -325,6 +325,38 @@ static int intel_engine_setup(struct intel_gt *gt, enum intel_engine_id id,
 	engine->id = id;
 	engine->legacy_idx = INVALID_ENGINE;
 	engine->mask = BIT(id);
+	if (GRAPHICS_VER(gt->i915) >= 11) {
+		static const u32 engine_reset_domains[] = {
+			[RCS0]  = GEN11_GRDOM_RENDER,
+			[BCS0]  = GEN11_GRDOM_BLT,
+			[VCS0]  = GEN11_GRDOM_MEDIA,
+			[VCS1]  = GEN11_GRDOM_MEDIA2,
+			[VCS2]  = GEN11_GRDOM_MEDIA3,
+			[VCS3]  = GEN11_GRDOM_MEDIA4,
+			[VCS4]  = GEN11_GRDOM_MEDIA5,
+			[VCS5]  = GEN11_GRDOM_MEDIA6,
+			[VCS6]  = GEN11_GRDOM_MEDIA7,
+			[VCS7]  = GEN11_GRDOM_MEDIA8,
+			[VECS0] = GEN11_GRDOM_VECS,
+			[VECS1] = GEN11_GRDOM_VECS2,
+			[VECS2] = GEN11_GRDOM_VECS3,
+			[VECS3] = GEN11_GRDOM_VECS4,
+		};
+		GEM_BUG_ON(id >= ARRAY_SIZE(engine_reset_domains) ||
+			   !engine_reset_domains[id]);
+		engine->reset_domain = engine_reset_domains[id];
+	} else {
+		static const u32 engine_reset_domains[] = {
+			[RCS0]  = GEN6_GRDOM_RENDER,
+			[BCS0]  = GEN6_GRDOM_BLT,
+			[VCS0]  = GEN6_GRDOM_MEDIA,
+			[VCS1]  = GEN8_GRDOM_MEDIA2,
+			[VECS0] = GEN6_GRDOM_VECS,
+		};
+		GEM_BUG_ON(id >= ARRAY_SIZE(engine_reset_domains) ||
+			   !engine_reset_domains[id]);
+		engine->reset_domain = engine_reset_domains[id];
+	}
 	engine->i915 = i915;
 	engine->gt = gt;
 	engine->uncore = gt->uncore;

drivers/gpu/drm/i915/gt/intel_engine_types.h

@@ -318,6 +318,7 @@ struct intel_engine_cs {
 	unsigned int guc_id;
 
 	intel_engine_mask_t mask;
+	u32 reset_domain;
 	/**
 	 * @logical_mask: logical mask of engine, reported to user space via
 	 * query IOCTL and used to communicate with the GuC in logical space.

drivers/gpu/drm/i915/gt/intel_reset.c

@@ -297,13 +297,6 @@ static int gen6_reset_engines(struct intel_gt *gt,
 			      intel_engine_mask_t engine_mask,
 			      unsigned int retry)
 {
-	static const u32 hw_engine_mask[] = {
-		[RCS0]  = GEN6_GRDOM_RENDER,
-		[BCS0]  = GEN6_GRDOM_BLT,
-		[VCS0]  = GEN6_GRDOM_MEDIA,
-		[VCS1]  = GEN8_GRDOM_MEDIA2,
-		[VECS0] = GEN6_GRDOM_VECS,
-	};
 	struct intel_engine_cs *engine;
 	u32 hw_mask;
 
@@ -314,8 +307,7 @@ static int gen6_reset_engines(struct intel_gt *gt,
 
 		hw_mask = 0;
 		for_each_engine_masked(engine, gt, engine_mask, tmp) {
-			GEM_BUG_ON(engine->id >= ARRAY_SIZE(hw_engine_mask));
-			hw_mask |= hw_engine_mask[engine->id];
+			hw_mask |= engine->reset_domain;
 		}
 	}
 
@@ -492,22 +484,6 @@ static int gen11_reset_engines(struct intel_gt *gt,
 			       intel_engine_mask_t engine_mask,
 			       unsigned int retry)
 {
-	static const u32 hw_engine_mask[] = {
-		[RCS0]  = GEN11_GRDOM_RENDER,
-		[BCS0]  = GEN11_GRDOM_BLT,
-		[VCS0]  = GEN11_GRDOM_MEDIA,
-		[VCS1]  = GEN11_GRDOM_MEDIA2,
-		[VCS2]  = GEN11_GRDOM_MEDIA3,
-		[VCS3]  = GEN11_GRDOM_MEDIA4,
-		[VCS4]  = GEN11_GRDOM_MEDIA5,
-		[VCS5]  = GEN11_GRDOM_MEDIA6,
-		[VCS6]  = GEN11_GRDOM_MEDIA7,
-		[VCS7]  = GEN11_GRDOM_MEDIA8,
-		[VECS0] = GEN11_GRDOM_VECS,
-		[VECS1] = GEN11_GRDOM_VECS2,
-		[VECS2] = GEN11_GRDOM_VECS3,
-		[VECS3] = GEN11_GRDOM_VECS4,
-	};
 	struct intel_engine_cs *engine;
 	intel_engine_mask_t tmp;
 	u32 reset_mask, unlock_mask = 0;
@@ -518,8 +494,7 @@ static int gen11_reset_engines(struct intel_gt *gt,
 	} else {
 		reset_mask = 0;
 		for_each_engine_masked(engine, gt, engine_mask, tmp) {
-			GEM_BUG_ON(engine->id >= ARRAY_SIZE(hw_engine_mask));
-			reset_mask |= hw_engine_mask[engine->id];
+			reset_mask |= engine->reset_domain;
 			ret = gen11_lock_sfc(engine, &reset_mask, &unlock_mask);
 			if (ret)
 				goto sfc_unlock;