tests: Prefix pm_ tests with i915_ and move them to i915/

They are i915-specific, so they belong to the directory.
The (now) infix _pm_ is quite informative and worth keeping.

v2: also prefix .c files

Cc: Petri Latvala <petri.latvala@intel.com>
Cc: Ewelina Musial <ewelina.musial@intel.com>
Signed-off-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
Reviewed-by: Petri Latvala <petri.latvala@intel.com>

1 files changed, 240 insertions, 0 deletions

diff --git a/tests/i915/i915_pm_rc6_residency.c b/tests/i915/i915_pm_rc6_residency.c
new file mode 100644
index 00000000..abc30ac6
--- /dev/null
+++ b/tests/i915/i915_pm_rc6_residency.c
@@ -0,0 +1,240 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Ben Widawsky <ben@bwidawsk.net>
+ *
+ */
+
+#include "igt.h"
+#include "igt_sysfs.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <time.h>
+
+
+#define SLEEP_DURATION 3 /* in seconds */
+
+#define RC6_ENABLED	1
+#define RC6P_ENABLED	2
+#define RC6PP_ENABLED	4
+
+static int sysfs;
+
+struct residencies {
+	int rc6;
+	int media_rc6;
+	int rc6p;
+	int rc6pp;
+	int duration;
+};
+
+static unsigned long get_rc6_enabled_mask(void)
+{
+	unsigned long enabled;
+
+	enabled = 0;
+	igt_sysfs_scanf(sysfs, "power/rc6_enable", "%lu", &enabled);
+	return enabled;
+}
+
+static bool has_rc6_residency(const char *name)
+{
+	unsigned long residency;
+	char path[128];
+
+	sprintf(path, "power/%s_residency_ms", name);
+	return igt_sysfs_scanf(sysfs, path, "%lu", &residency) == 1;
+}
+
+static unsigned long read_rc6_residency(const char *name)
+{
+	unsigned long residency;
+	char path[128];
+
+	residency = 0;
+	sprintf(path, "power/%s_residency_ms", name);
+	igt_assert(igt_sysfs_scanf(sysfs, path, "%lu", &residency) == 1);
+	return residency;
+}
+
+static void residency_accuracy(unsigned int diff,
+			       unsigned int duration,
+			       const char *name_of_rc6_residency)
+{
+	double ratio;
+
+	ratio = (double)diff / duration;
+
+	igt_info("Residency in %s or deeper state: %u ms (sleep duration %u ms) (%.1f%% of expected duration)\n",
+		 name_of_rc6_residency, diff, duration, 100*ratio);
+	igt_assert_f(ratio > 0.9 && ratio < 1.05,
+		     "Sysfs RC6 residency counter is inaccurate.\n");
+}
+
+static unsigned long gettime_ms(void)
+{
+	struct timespec ts;
+
+	clock_gettime(CLOCK_MONOTONIC, &ts);
+
+	return ts.tv_sec * 1000 + ts.tv_nsec / 1000000;
+}
+
+static void read_residencies(int devid, unsigned int mask,
+			     struct residencies *res)
+{
+	res->duration = gettime_ms();
+
+	if (mask & RC6_ENABLED)
+		res->rc6 = read_rc6_residency("rc6");
+
+	if ((mask & RC6_ENABLED) &&
+	    (IS_VALLEYVIEW(devid) || IS_CHERRYVIEW(devid)))
+		res->media_rc6 = read_rc6_residency("media_rc6");
+
+	if (mask & RC6P_ENABLED)
+		res->rc6p = read_rc6_residency("rc6p");
+
+	if (mask & RC6PP_ENABLED)
+		res->rc6pp = read_rc6_residency("rc6pp");
+
+	res->duration += (gettime_ms() - res->duration) / 2;
+}
+
+static void measure_residencies(int devid, unsigned int mask,
+				struct residencies *res)
+{
+	struct residencies start = { };
+	struct residencies end = { };
+	int retry;
+
+	/*
+	 * Retry in case of counter wrap-around. We simply re-run the
+	 * measurement, since the valid counter range is different on
+	 * different platforms and so fixing it up would be non-trivial.
+	 */
+	read_residencies(devid, mask, &end);
+	igt_debug("time=%d: rc6=(%d, %d), rc6p=%d, rc6pp=%d\n",
+		  end.duration, end.rc6, end.media_rc6, end.rc6p, end.rc6pp);
+	for (retry = 0; retry < 2; retry++) {
+		start = end;
+		sleep(SLEEP_DURATION);
+		read_residencies(devid, mask, &end);
+
+		igt_debug("time=%d: rc6=(%d, %d), rc6p=%d, rc6pp=%d\n",
+			  end.duration,
+			  end.rc6, end.media_rc6, end.rc6p, end.rc6pp);
+
+		if (end.rc6 >= start.rc6 &&
+		    end.media_rc6 >= start.media_rc6 &&
+		    end.rc6p >= start.rc6p &&
+		    end.rc6pp >= start.rc6pp)
+			break;
+	}
+	igt_assert_f(retry < 2, "residency values are not consistent\n");
+
+	res->rc6 = end.rc6 - start.rc6;
+	res->rc6p = end.rc6p - start.rc6p;
+	res->rc6pp = end.rc6pp - start.rc6pp;
+	res->media_rc6 = end.media_rc6 - start.media_rc6;
+	res->duration = end.duration - start.duration;
+
+	/*
+	 * For the purposes of this test case we want a given residency value
+	 * to include the time spent in the corresponding RC state _and_ also
+	 * the time spent in any enabled deeper states. So for example if any
+	 * of RC6P or RC6PP is enabled we want the time spent in these states
+	 * to be also included in the RC6 residency value. The kernel reported
+	 * residency values are exclusive, so add up things here.
+	 */
+	res->rc6p += res->rc6pp;
+	res->rc6 += res->rc6p;
+}
+
+static bool wait_for_rc6(void)
+{
+	struct timespec tv = {};
+	unsigned long start, now;
+
+	/* First wait for roughly an RC6 Evaluation Interval */
+	usleep(160 * 1000);
+
+	/* Then poll for RC6 to start ticking */
+	now = read_rc6_residency("rc6");
+	do {
+		start = now;
+		usleep(5000);
+		now = read_rc6_residency("rc6");
+		if (now - start > 1)
+			return true;
+	} while (!igt_seconds_elapsed(&tv));
+
+	return false;
+}
+
+igt_main
+{
+	unsigned int rc6_enabled = 0;
+	unsigned int devid = 0;
+
+	igt_skip_on_simulation();
+
+	/* Use drm_open_driver to verify device existence */
+	igt_fixture {
+		int fd;
+
+		fd = drm_open_driver(DRIVER_INTEL);
+		devid = intel_get_drm_devid(fd);
+		sysfs = igt_sysfs_open(fd, NULL);
+
+		igt_require(has_rc6_residency("rc6"));
+
+		/* Make sure rc6 counters are running */
+		igt_drop_caches_set(fd, DROP_IDLE);
+		igt_require(wait_for_rc6());
+
+		close(fd);
+
+		rc6_enabled = get_rc6_enabled_mask();
+		igt_require(rc6_enabled & RC6_ENABLED);
+	}
+
+	igt_subtest("rc6-accuracy") {
+		struct residencies res;
+
+		measure_residencies(devid, rc6_enabled, &res);
+		residency_accuracy(res.rc6, res.duration, "rc6");
+	}
+
+	igt_subtest("media-rc6-accuracy") {
+		struct residencies res;
+
+		igt_require(IS_VALLEYVIEW(devid) || IS_CHERRYVIEW(devid));
+
+		measure_residencies(devid, rc6_enabled, &res);
+		residency_accuracy(res.media_rc6, res.duration, "media_rc6");
+	}
+}