Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
---
tests/Makefile.am | 1 +
tests/sysfs_rps.c | 179 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 180 insertions(+)
create mode 100644 tests/sysfs_rps.c
diff --git a/tests/Makefile.am b/tests/Makefile.am
index d4c7c46..d88a83a 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -71,6 +71,7 @@ TESTS_progs = \
drm_vma_limiter_gtt \
drm_vma_limiter_cached \
sysfs_rc6_residency \
+ sysfs_rps \
flip_test \
gem_wait_render_timeout \
gem_ctx_create \
diff --git a/tests/sysfs_rps.c b/tests/sysfs_rps.c
new file mode 100644
index 0000000..b830797
--- /dev/null
+++ b/tests/sysfs_rps.c
@@ -0,0 +1,179 @@
+/*
+ * 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 at bwidawsk.net>
+ *
+ */
+
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "drmtest.h"
+
+static bool verbose = false;
+static int origmin, origmax;
+
+#define restore_assert(COND) do { \
+ if (!(COND)) { \
+ writeval(stuff[MIN].filp, origmin); \
+ writeval(stuff[MAX].filp, origmax); \
+ assert(0); \
+ } \
+} while (0);
+
+static const char sysfs_base_path[] = "/sys/class/drm/card%d/gt_%s_freq_mhz";
+enum {
+ CUR,
+ MIN,
+ MAX,
+ RP0,
+ RP1,
+ RPn
+};
+
+struct junk {
+ const char *name;
+ const char *mode;
+ FILE *filp;
+} stuff[] = {
+ { "cur", "r", NULL }, { "min", "rb+", NULL }, { "max", "rb+", NULL }, { "RP0", "r", NULL }, { "RP1", "r", NULL }, { "RPn", "r", NULL }, { NULL, NULL, NULL }
+};
+
+static int readval(FILE *filp)
+{
+ int val;
+ fflush(filp);
+ rewind(filp);
+ fscanf(filp, "%d", &val);
+ return val;
+}
+
+static void writeval(FILE *filp, int val)
+{
+ rewind(filp);
+ fprintf(filp, "%d", val);
+ fflush(filp);
+}
+
+#define fcur (readval(stuff[CUR].filp))
+#define fmin (readval(stuff[MIN].filp))
+#define fmax (readval(stuff[MAX].filp))
+#define frp0 (readval(stuff[RP0].filp))
+#define frp1 (readval(stuff[RP1].filp))
+#define frpn (readval(stuff[RPn].filp))
+
+static void setfreq(int val)
+{
+ writeval(stuff[MIN].filp, val);
+ writeval(stuff[MAX].filp, val);
+}
+
+static void checkit(void)
+{
+ restore_assert(fmin <= fmax);
+ restore_assert(fcur <= fmax);
+ restore_assert(fmin <= fcur);
+ restore_assert(frpn <= fmin);
+ restore_assert(fmax <= frp0);
+ restore_assert(frp1 <= frp0);
+ restore_assert(frpn <= frp1);
+ restore_assert(frp0 != 0);
+ restore_assert(frp1 != 0);
+}
+
+static void dumpit(void)
+{
+ struct junk *junk = stuff;
+ do {
+ printf("gt frequency %s (MHz): %d\n", junk->name, readval(junk->filp));
+ junk++;
+ } while(junk->name != NULL);
+
+ printf("\n");
+}
+
+
+int main(int argc, char *argv[])
+{
+ const int device = drm_get_card(0);
+ struct junk *junk = stuff;
+ int fd, ret;
+
+ if (argc > 1)
+ verbose++;
+
+ /* Use drm_open_any to verify device existence */
+ fd = drm_open_any();
+ close(fd);
+
+ do {
+ int val = -1;
+ char *path;
+ ret = asprintf(&path, sysfs_base_path, device, junk->name);
+ assert(ret != -1);
+ junk->filp = fopen(path, junk->mode);
+ if (junk->filp == NULL) {
+ fprintf(stderr, "Kernel is too old. GTFO\n");
+ exit(77);
+ }
+ val = readval(junk->filp);
+ assert(val >= 0);
+ junk++;
+ } while(junk->name != NULL);
+
+ origmin = fmin;
+ origmax = fmax;
+
+ if (verbose)
+ printf("Original min = %d\nOriginal max = %d\n", origmin, origmax);
+
+ if (verbose)
+ dumpit();
+
+ checkit();
+ setfreq(fmin);
+ if (verbose)
+ dumpit();
+ restore_assert(fcur == fmin);
+ setfreq(fmax);
+ if (verbose)
+ dumpit();
+ restore_assert(fcur == fmax);
+ checkit();
+
+ /* And some errors */
+ writeval(stuff[MIN].filp, frpn - 1);
+ writeval(stuff[MAX].filp, frp0 + 1000);
+ checkit();
+
+ writeval(stuff[MIN].filp, fmax + 1000);
+ writeval(stuff[MAX].filp, fmin - 1);
+ checkit();
+
+ writeval(stuff[MIN].filp, origmin);
+ writeval(stuff[MAX].filp, origmax);
+
+ exit(EXIT_SUCCESS);
+}
--
1.7.12
