tests: use lib igt_[get|set]_stop_rings()

on gem_reset_stats, kms_flip and pm_rps.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=75876
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>

tests/gem_reset_stats.c

@@ -242,38 +242,10 @@ static int exec_valid(int fd, int ctx)
 	return exec_valid_ring(fd, ctx, current_ring->exec);
 }
 
-static void stop_rings(const int mask)
-{
-	int fd;
-	char buf[80];
-
-	igt_assert((mask & ~((1 << NUM_RINGS) - 1)) == 0);
-	igt_assert(snprintf(buf, sizeof(buf), "0x%02x", mask) == 4);
-	fd = igt_debugfs_open("i915_ring_stop", O_WRONLY);
-	igt_assert(fd >= 0);
-
-	igt_assert(write(fd, buf, 4) == 4);
-	close(fd);
-}
-
 #define BUFSIZE (4 * 1024)
 #define ITEMS   (BUFSIZE >> 2)
 
-static int ring_to_mask(int ring)
-{
-	for (unsigned i = 0; i < NUM_RINGS; i++) {
-		const struct target_ring *r = &rings[i];
-
-		if (r->exec == ring)
-			return (1 << i);
-	}
-
-	igt_assert(0);
-
-	return -1;
-}
-
-static int inject_hang_ring(int fd, int ctx, int ring)
+static int inject_hang_ring(int fd, int ctx, int ring, bool ignore_ban_error)
 {
 	struct drm_i915_gem_execbuffer2 execbuf;
 	struct drm_i915_gem_exec_object2 exec;
@@ -281,6 +253,7 @@ static int inject_hang_ring(int fd, int ctx, int ring)
 	uint32_t *buf;
 	int roff, i;
 	unsigned cmd_len = 2;
+	enum stop_ring_flags flags;
 
 	srandom(time(NULL));
 
@@ -364,14 +337,26 @@ static int inject_hang_ring(int fd, int ctx, int ring)
 
 	free(buf);
 
-	stop_rings(ring_to_mask(ring));
+	flags = igt_to_stop_ring_flag(ring);
+
+	flags |= STOP_RING_ALLOW_BAN;
+
+	if (!ignore_ban_error)
+		flags |= STOP_RING_ALLOW_ERRORS;
+
+	igt_set_stop_rings(flags);
 
 	return exec.handle;
 }
 
 static int inject_hang(int fd, int ctx)
 {
-	return inject_hang_ring(fd, ctx, current_ring->exec);
+	return inject_hang_ring(fd, ctx, current_ring->exec, false);
+}
+
+static int inject_hang_no_ban_error(int fd, int ctx)
+{
+	return inject_hang_ring(fd, ctx, current_ring->exec, true);
 }
 
 static int _assert_reset_status(int fd, int ctx, int status)
@@ -553,7 +538,7 @@ static void test_ban(void)
 	assert_reset_status(fd_bad, 0, RS_NO_ERROR);
 	assert_reset_status(fd_good, 0, RS_NO_ERROR);
 
-	h2 = inject_hang(fd_bad, 0);
+	h2 = inject_hang_no_ban_error(fd_bad, 0);
 	igt_assert(h2 >= 0);
 	active_count++;
 	/* Second hang will be pending for this */
@@ -563,7 +548,7 @@ static void test_ban(void)
 	h7 = exec_valid(fd_good, 0);
 
         while (retry--) {
-                h3 = inject_hang(fd_bad, 0);
+                h3 = inject_hang_no_ban_error(fd_bad, 0);
                 igt_assert(h3 >= 0);
                 gem_sync(fd_bad, h3);
 		active_count++;
@@ -645,7 +630,7 @@ static void test_ban_ctx(void)
 	assert_reset_status(fd, ctx_good, RS_NO_ERROR);
 	assert_reset_status(fd, ctx_bad, RS_NO_ERROR);
 
-	h2 = inject_hang(fd, ctx_bad);
+	h2 = inject_hang_no_ban_error(fd, ctx_bad);
 	igt_assert(h2 >= 0);
 	active_count++;
 	/* Second hang will be pending for this */
@@ -655,7 +640,7 @@ static void test_ban_ctx(void)
 	h7 = exec_valid(fd, ctx_good);
 
         while (retry--) {
-                h3 = inject_hang(fd, ctx_bad);
+                h3 = inject_hang_no_ban_error(fd, ctx_bad);
                 igt_assert(h3 >= 0);
                 gem_sync(fd, h3);
 		active_count++;

tests/kms_flip.c

@@ -44,6 +44,7 @@
 #include "intel_batchbuffer.h"
 #include "igt_kms.h"
 #include "igt_aux.h"
+#include "igt_debugfs.h"
 
 #define TEST_DPMS		(1 << 0)
 #define TEST_WITH_DUMMY_BCS	(1 << 1)
@@ -692,35 +693,17 @@ static void set_y_tiling(struct test_output *o, int fb_idx)
 
 static void stop_rings(bool stop)
 {
-	static const char dfs_base[] = "/sys/kernel/debug/dri";
-	static const char dfs_entry[] = "i915_ring_stop";
-	static const char stop_data[] = "0xf";
-	static const char run_data[] = "0x0";
-	char fname[FILENAME_MAX];
-	int card_index = drm_get_card();
-	int fd;
-
-	snprintf(fname, FILENAME_MAX, "%s/%i/%s",
-		 dfs_base, card_index, dfs_entry);
-
-	fd = open(fname, O_WRONLY);
-	igt_assert(fd >= 0);
-
 	if (stop)
-		igt_assert(write(fd, stop_data, sizeof(stop_data)) == sizeof(stop_data));
+		igt_set_stop_rings(STOP_RING_DEFAULTS);
 	else
-		igt_assert(write(fd, run_data, sizeof(run_data)) == sizeof(run_data));
-
-	close(fd);
+		igt_set_stop_rings(STOP_RING_NONE);
 }
 
 static void eat_error_state(void)
 {
 	static const char dfs_base[] = "/sys/kernel/debug/dri";
 	static const char dfs_entry_error[] = "i915_error_state";
-	static const char dfs_entry_stop[] = "i915_ring_stop";
 	static const char data[] = "";
-	static char tmp[128];
 	char fname[FILENAME_MAX];
 	int card_index = drm_get_card();
 	int fd;
@@ -739,16 +722,9 @@ static void eat_error_state(void)
 
 	/* and check whether stop_rings is not reset, i.e. the hang has indeed
 	 * happened */
-	snprintf(fname, FILENAME_MAX, "%s/%i/%s",
-		 dfs_base, card_index, dfs_entry_stop);
-
-	fd = open(fname, O_RDONLY);
-	igt_assert(fd >= 0);
-
-	igt_assert(read(fd, tmp, sizeof tmp) > 0);
-
-	igt_assert_f(atoi(tmp) == 0,
-		     "no gpu hang detected, stop_rings is still %s\n", tmp);
+	igt_assert_f(igt_get_stop_rings() == STOP_RING_NONE,
+		     "no gpu hang detected, stop_rings is still 0x%x\n",
+		     igt_get_stop_rings());
 
 	close(fd);
 }

tests/pm_rps.c

@@ -306,37 +306,6 @@ static void load_helper_deinit(void)
 		drm_intel_bufmgr_destroy(lh.bufmgr);
 }
 
-static void stop_rings(void)
-{
-	int fd;
-	static const char data[] = "0xf";
-
-	fd = igt_debugfs_open("i915_ring_stop", O_WRONLY);
-	igt_assert(fd >= 0);
-
-	igt_debug("injecting ring stop\n");
-	igt_assert(write(fd, data, sizeof(data)) == sizeof(data));
-
-	close(fd);
-}
-
-static bool rings_stopped(void)
-{
-	int fd;
-	static char buf[128];
-	unsigned long long val;
-
-	fd = igt_debugfs_open("i915_ring_stop", O_RDONLY);
-	igt_assert(fd >= 0);
-
-	igt_assert(read(fd, buf, sizeof(buf)) > 0);
-	close(fd);
-
-	sscanf(buf, "%llx", &val);
-
-	return (bool)val;
-}
-
 static void min_max_config(void (*check)(void))
 {
 	int fmid = (origfreqs[RPn] + origfreqs[RP0]) / 2;
@@ -499,8 +468,8 @@ static void reset(void)
 	stabilize_check(pre_freqs);
 
 	igt_debug("Stop rings...\n");
-	stop_rings();
-	while (rings_stopped())
+	igt_set_stop_rings(STOP_RING_DEFAULTS);
+	while (igt_get_stop_rings())
 		usleep(1000 * 100);
 	igt_debug("Ring stop cleared\n");