tools/power/x86/intel-speed-select: Turbo-freq feature auto mode

Introduce --auto|-a option to turbo-freq enable feature, so that it
does in one step for users who are OK by setting all passed target cores
as high priority and set in CLOS 0 and remaining in CLOS 3. In this way,
users don't have to take multiple steps to enable turbo-freq feature. For
users who want more fine grain control, they can always use core-power
feature to set custom CLOS configuration and assignment.

While here also print the error to output when clos configuration fails.

For example
intel-speed-select -c 0-4 turbo-freq enable --auto

The above command will enable turbo-freq and core-power feature. Also
mark CPU 0 to CPU 4 as high priority.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

tools/power/x86/intel-speed-select/isst-config.c

@@ -1173,40 +1173,58 @@ static void set_fact_for_cpu(int cpu, void *arg1, void *arg2, void *arg3,
 	int ret;
 	int status = *(int *)arg4;
 
+	if (auto_mode) {
+		if (status) {
+			ret = isst_pm_qos_config(cpu, 1, 1);
+			if (ret)
+				goto disp_results;
+		} else {
+			isst_pm_qos_config(cpu, 0, 0);
+		}
+	}
+
 	ret = isst_set_pbf_fact_status(cpu, 0, status);
-	if (ret)
+	if (ret) {
 		perror("isst_set_fact");
-	else {
-		if (status) {
-			struct isst_pkg_ctdp pkg_dev;
+		if (auto_mode)
+			isst_pm_qos_config(cpu, 0, 0);
 
-			ret = isst_get_ctdp_levels(cpu, &pkg_dev);
-			if (ret) {
-				isst_display_result(cpu, outf, "turbo-freq",
-						    "enable", ret);
-				return;
-			}
+		goto disp_results;
+	}
+
+	/* Set TRL */
+	if (status) {
+		struct isst_pkg_ctdp pkg_dev;
+
+		ret = isst_get_ctdp_levels(cpu, &pkg_dev);
+		if (!ret)
 			ret = isst_set_trl(cpu, fact_trl);
-			isst_display_result(cpu, outf, "turbo-freq", "enable",
-					    ret);
-		} else {
-			/* Since we modified TRL during Fact enable, restore it */
-			isst_set_trl_from_current_tdp(cpu, fact_trl);
-			isst_display_result(cpu, outf, "turbo-freq", "disable",
-					    ret);
-		}
+		if (ret && auto_mode)
+			isst_pm_qos_config(cpu, 0, 0);
+	}
+
+disp_results:
+	if (status) {
+		isst_display_result(cpu, outf, "turbo-freq", "enable", ret);
+	} else {
+		/* Since we modified TRL during Fact enable, restore it */
+		isst_set_trl_from_current_tdp(cpu, fact_trl);
+		isst_display_result(cpu, outf, "turbo-freq", "disable", ret);
 	}
 }
 
 static void set_fact_enable(void)
 {
-	int status = 1;
+	int status = 1, i, ret;
 
 	if (cmd_help) {
 		fprintf(stderr,
 			"Enable Intel Speed Select Technology Turbo frequency feature\n");
 		fprintf(stderr,
 			"Optional: -t|--trl : Specify turbo ratio limit\n");
+		fprintf(stderr,
+			"\tOptional Arguments: -a|--auto : Designate specified target CPUs with");
+		fprintf(stderr, "-C|--cpu option as as high priority using core-power feature\n");
 		exit(0);
 	}
 
@@ -1218,6 +1236,83 @@ static void set_fact_enable(void)
 		for_each_online_package_in_set(set_fact_for_cpu, NULL, NULL,
 					       NULL, &status);
 	isst_ctdp_display_information_end(outf);
+
+	if (auto_mode) {
+		/*
+		 * When we adjust CLOS param, we have to set for siblings also.
+		 * So for the each user specified CPU, also add the sibling
+		 * in the present_cpu_mask.
+		 */
+		for (i = 0; i < get_topo_max_cpus(); ++i) {
+			char buffer[128], sibling_list[128], *cpu_str;
+			int fd, len;
+
+			if (!CPU_ISSET_S(i, target_cpumask_size, target_cpumask))
+				continue;
+
+			snprintf(buffer, sizeof(buffer),
+				 "/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list", i);
+
+			fd = open(buffer, O_RDONLY);
+			if (fd < 0)
+				continue;
+
+			len = read(fd, sibling_list, sizeof(sibling_list));
+			close(fd);
+
+			if (len < 0)
+				continue;
+
+			cpu_str = strtok(sibling_list, ",");
+			while (cpu_str != NULL) {
+				int cpu;
+
+				sscanf(cpu_str, "%d", &cpu);
+				CPU_SET_S(cpu, target_cpumask_size, target_cpumask);
+				cpu_str = strtok(NULL, ",");
+			}
+		}
+
+		for (i = 0; i < get_topo_max_cpus(); ++i) {
+			int clos;
+
+			if (!CPU_ISSET_S(i, present_cpumask_size, present_cpumask))
+				continue;
+
+			ret = set_clos_param(i, 0, 0, 0, 0, 0xff);
+			if (ret)
+				goto error_disp;
+
+			ret = set_clos_param(i, 1, 15, 0, 0, 0xff);
+			if (ret)
+				goto error_disp;
+
+			ret = set_clos_param(i, 2, 15, 0, 0, 0xff);
+			if (ret)
+				goto error_disp;
+
+			ret = set_clos_param(i, 3, 15, 0, 0, 0xff);
+			if (ret)
+				goto error_disp;
+
+			if (CPU_ISSET_S(i, target_cpumask_size, target_cpumask))
+				clos = 0;
+			else
+				clos = 3;
+
+			debug_printf("Associate cpu: %d clos: %d\n", i, clos);
+			ret = isst_clos_associate(i, clos);
+			if (ret)
+				goto error_disp;
+		}
+		isst_display_result(i, outf, "turbo-freq --auto", "enable", 0);
+	}
+
+	return;
+
+error_disp:
+	isst_display_result(i, outf, "turbo-freq --auto", "enable", ret);
+
 }
 
 static void set_fact_disable(void)
@@ -1229,6 +1324,8 @@ static void set_fact_disable(void)
 			"Disable Intel Speed Select Technology turbo frequency feature\n");
 		fprintf(stderr,
 			"Optional: -t|--trl : Specify turbo ratio limit\n");
+		fprintf(stderr,
+			"\tOptional Arguments: -a|--auto : Also disable core-power associations\n");
 		exit(0);
 	}
 
@@ -1249,16 +1346,15 @@ static void enable_clos_qos_config(int cpu, void *arg1, void *arg2, void *arg3,
 	int status = *(int *)arg4;
 
 	ret = isst_pm_qos_config(cpu, status, clos_priority_type);
-	if (ret) {
+	if (ret)
 		perror("isst_pm_qos_config");
-	} else {
-		if (status)
-			isst_display_result(cpu, outf, "core-power", "enable",
-					    ret);
-		else
-			isst_display_result(cpu, outf, "core-power", "disable",
-					    ret);
-	}
+
+	if (status)
+		isst_display_result(cpu, outf, "core-power", "enable",
+				    ret);
+	else
+		isst_display_result(cpu, outf, "core-power", "disable",
+				    ret);
 }
 
 static void set_clos_enable(void)