thermal: intel: selftests: workload_hint: Support slow workload hints

Add option to enable slow workload type hints. User can specify
"slow" as the command line argument to enable slow workload type hints.
There are two slow workload type hints: "power" and "performance".

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://patch.msgid.link/20251218222559.4110027-3-srinivas.pandruvada@linux.intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Author: spandruvada

tools/testing/selftests/thermal/intel/workload_hint/workload_hint_test.c

@@ -12,6 +12,7 @@
 
 #define WORKLOAD_NOTIFICATION_DELAY_ATTRIBUTE "/sys/bus/pci/devices/0000:00:04.0/workload_hint/notification_delay_ms"
 #define WORKLOAD_ENABLE_ATTRIBUTE "/sys/bus/pci/devices/0000:00:04.0/workload_hint/workload_hint_enable"
+#define WORKLOAD_SLOW_ENABLE_ATTRIBUTE "/sys/bus/pci/devices/0000:00:04.0/workload_hint/workload_slow_hint_enable"
 #define WORKLOAD_TYPE_INDEX_ATTRIBUTE  "/sys/bus/pci/devices/0000:00:04.0/workload_hint/workload_type_index"
 
 static const char * const workload_types[] = {
@@ -22,6 +23,9 @@ static const char * const workload_types[] = {
 	NULL
 };
 
+static int wlt_slow;
+static char *wlt_enable_attr;
+
 #define WORKLOAD_TYPE_MAX_INDEX	3
 
 void workload_hint_exit(int signum)
@@ -30,7 +34,7 @@ void workload_hint_exit(int signum)
 
 	/* Disable feature via sysfs knob */
 
-	fd = open(WORKLOAD_ENABLE_ATTRIBUTE, O_RDWR);
+	fd = open(wlt_enable_attr, O_RDWR);
 	if (fd < 0) {
 		perror("Unable to open workload type feature enable file");
 		exit(1);
@@ -46,6 +50,26 @@ void workload_hint_exit(int signum)
 	close(fd);
 }
 
+static void update_delay(char *delay_str)
+{
+	int fd;
+
+	printf("Setting notification delay in ms to %s\n", delay_str);
+
+	fd = open(WORKLOAD_NOTIFICATION_DELAY_ATTRIBUTE, O_RDWR);
+	if (fd < 0) {
+		perror("Unable to open workload notification delay");
+		exit(1);
+	}
+
+	if (write(fd, delay_str, strlen(delay_str)) < 0) {
+		perror("Can't set delay");
+		exit(1);
+	}
+
+	close(fd);
+}
+
 int main(int argc, char **argv)
 {
 	struct pollfd ufd;
@@ -54,32 +78,26 @@ int main(int argc, char **argv)
 	char delay_str[64];
 	int delay = 0;
 
-	printf("Usage: workload_hint_test [notification delay in milli seconds]\n");
+	printf("Usage: workload_hint_test [notification delay in milli seconds][slow]\n");
 
 	if (argc > 1) {
-		ret = sscanf(argv[1], "%d", &delay);
-		if (ret < 0) {
-			printf("Invalid delay\n");
-			exit(1);
-		}
+		int i;
 
-		printf("Setting notification delay to %d ms\n", delay);
-		if (delay < 0)
-			exit(1);
+		for (i = 1; i < argc; ++i) {
+			if (!strcmp(argv[i], "slow")) {
+				wlt_slow = 1;
+				continue;
+			}
 
-		sprintf(delay_str, "%s\n", argv[1]);
-		fd = open(WORKLOAD_NOTIFICATION_DELAY_ATTRIBUTE, O_RDWR);
-		if (fd < 0) {
-			perror("Unable to open workload notification delay");
-			exit(1);
-		}
+			ret = sscanf(argv[1], "%d", &delay);
+			if (ret < 0) {
+				printf("Invalid delay\n");
+				exit(1);
+			}
 
-		if (write(fd, delay_str, strlen(delay_str)) < 0) {
-			perror("Can't set delay");
-			exit(1);
+			sprintf(delay_str, "%s\n", argv[1]);
+			update_delay(delay_str);
 		}
-
-		close(fd);
 	}
 
 	if (signal(SIGINT, workload_hint_exit) == SIG_IGN)
@@ -89,8 +107,13 @@ int main(int argc, char **argv)
 	if (signal(SIGTERM, workload_hint_exit) == SIG_IGN)
 		signal(SIGTERM, SIG_IGN);
 
+	if (wlt_slow)
+		wlt_enable_attr = WORKLOAD_SLOW_ENABLE_ATTRIBUTE;
+	else
+		wlt_enable_attr = WORKLOAD_ENABLE_ATTRIBUTE;
+
 	/* Enable feature via sysfs knob */
-	fd = open(WORKLOAD_ENABLE_ATTRIBUTE, O_RDWR);
+	fd = open(wlt_enable_attr, O_RDWR);
 	if (fd < 0) {
 		perror("Unable to open workload type feature enable file");
 		exit(1);
@@ -145,6 +168,13 @@ int main(int argc, char **argv)
 			if (ret < 0)
 				break;
 
+			if (wlt_slow) {
+				if (index & 0x10)
+					printf("workload type slow:%s\n", "power");
+				else
+					printf("workload type slow:%s\n", "performance");
+			}
+
 			index &= 0x0f;
 			if (index > WORKLOAD_TYPE_MAX_INDEX)
 				printf("Invalid workload type index\n");