drm/i915/pmu: Export counters from all tiles

Start exporting frequency and RC6 counters from all tiles.

Existing counters keep their names and config values and new one use the
namespace added in the previous patch, with the "-gtN" added to their
names.

Interrupts counter is an odd one off. Because it is the global device
counters (not only GT) we choose not to add per tile versions for now.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Aravind Iddamsetty <aravind.iddamsetty@intel.com>
Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230519154946.3751971-8-umesh.nerlige.ramappa@intel.com

Author: tursulin

drivers/gpu/drm/i915/i915_pmu.c

@@ -940,11 +940,20 @@ static const struct attribute_group i915_pmu_cpumask_attr_group = {
 	.attrs = i915_cpumask_attrs,
 };
 
-#define __event(__config, __name, __unit) \
+#define __event(__counter, __name, __unit) \
 { \
-	.config = (__config), \
+	.counter = (__counter), \
 	.name = (__name), \
 	.unit = (__unit), \
+	.global = false, \
+}
+
+#define __global_event(__counter, __name, __unit) \
+{ \
+	.counter = (__counter), \
+	.name = (__name), \
+	.unit = (__unit), \
+	.global = true, \
 }
 
 #define __engine_event(__sample, __name) \
@@ -983,15 +992,16 @@ create_event_attributes(struct i915_pmu *pmu)
 {
 	struct drm_i915_private *i915 = container_of(pmu, typeof(*i915), pmu);
 	static const struct {
-		u64 config;
+		unsigned int counter;
 		const char *name;
 		const char *unit;
+		bool global;
 	} events[] = {
-		__event(I915_PMU_ACTUAL_FREQUENCY, "actual-frequency", "M"),
-		__event(I915_PMU_REQUESTED_FREQUENCY, "requested-frequency", "M"),
-		__event(I915_PMU_INTERRUPTS, "interrupts", NULL),
-		__event(I915_PMU_RC6_RESIDENCY, "rc6-residency", "ns"),
-		__event(I915_PMU_SOFTWARE_GT_AWAKE_TIME, "software-gt-awake-time", "ns"),
+		__event(0, "actual-frequency", "M"),
+		__event(1, "requested-frequency", "M"),
+		__global_event(2, "interrupts", NULL),
+		__event(3, "rc6-residency", "ns"),
+		__event(4, "software-gt-awake-time", "ns"),
 	};
 	static const struct {
 		enum drm_i915_pmu_engine_sample sample;
@@ -1006,12 +1016,17 @@ create_event_attributes(struct i915_pmu *pmu)
 	struct i915_ext_attribute *i915_attr = NULL, *i915_iter;
 	struct attribute **attr = NULL, **attr_iter;
 	struct intel_engine_cs *engine;
-	unsigned int i;
+	struct intel_gt *gt;
+	unsigned int i, j;
 
 	/* Count how many counters we will be exposing. */
-	for (i = 0; i < ARRAY_SIZE(events); i++) {
-		if (!config_status(i915, events[i].config))
-			count++;
+	for_each_gt(gt, i915, j) {
+		for (i = 0; i < ARRAY_SIZE(events); i++) {
+			u64 config = ___I915_PMU_OTHER(j, events[i].counter);
+
+			if (!config_status(i915, config))
+				count++;
+		}
 	}
 
 	for_each_uabi_engine(engine, i915) {
@@ -1041,26 +1056,39 @@ create_event_attributes(struct i915_pmu *pmu)
 	attr_iter = attr;
 
 	/* Initialize supported non-engine counters. */
-	for (i = 0; i < ARRAY_SIZE(events); i++) {
-		char *str;
-
-		if (config_status(i915, events[i].config))
-			continue;
-
-		str = kstrdup(events[i].name, GFP_KERNEL);
-		if (!str)
-			goto err;
+	for_each_gt(gt, i915, j) {
+		for (i = 0; i < ARRAY_SIZE(events); i++) {
+			u64 config = ___I915_PMU_OTHER(j, events[i].counter);
+			char *str;
 
-		*attr_iter++ = &i915_iter->attr.attr;
-		i915_iter = add_i915_attr(i915_iter, str, events[i].config);
+			if (config_status(i915, config))
+				continue;
 
-		if (events[i].unit) {
-			str = kasprintf(GFP_KERNEL, "%s.unit", events[i].name);
+			if (events[i].global || !HAS_EXTRA_GT_LIST(i915))
+				str = kstrdup(events[i].name, GFP_KERNEL);
+			else
+				str = kasprintf(GFP_KERNEL, "%s-gt%u",
+						events[i].name, j);
 			if (!str)
 				goto err;
 
-			*attr_iter++ = &pmu_iter->attr.attr;
-			pmu_iter = add_pmu_attr(pmu_iter, str, events[i].unit);
+			*attr_iter++ = &i915_iter->attr.attr;
+			i915_iter = add_i915_attr(i915_iter, str, config);
+
+			if (events[i].unit) {
+				if (events[i].global || !HAS_EXTRA_GT_LIST(i915))
+					str = kasprintf(GFP_KERNEL, "%s.unit",
+							events[i].name);
+				else
+					str = kasprintf(GFP_KERNEL, "%s-gt%u.unit",
+							events[i].name, j);
+				if (!str)
+					goto err;
+
+				*attr_iter++ = &pmu_iter->attr.attr;
+				pmu_iter = add_pmu_attr(pmu_iter, str,
+							events[i].unit);
+			}
 		}
 	}