From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Tests and intel_gpu_top will share common code for parsing this file.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
---
lib/igt_drm_fdinfo.c | 161 +++++++++++++++++++++++++++++++++++++++++++
lib/igt_drm_fdinfo.h | 47 +++++++++++++
lib/meson.build | 7 ++
3 files changed, 215 insertions(+)
create mode 100644 lib/igt_drm_fdinfo.c
create mode 100644 lib/igt_drm_fdinfo.h
diff --git a/lib/igt_drm_fdinfo.c b/lib/igt_drm_fdinfo.c
new file mode 100644
index 000000000000..86cc64da8c68
--- /dev/null
+++ b/lib/igt_drm_fdinfo.c
@@ -0,0 +1,161 @@
+/*
+ * Copyright © 2022 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.
+ *
+ */
+
+#include <ctype.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "drmtest.h"
+
+#include "igt_drm_fdinfo.h"
+
+static FILE *fropenat(DIR *at, const char *name)
+{
+ FILE *f;
+ int fd;
+
+ fd = openat(dirfd(at), name, O_RDONLY);
+ if (fd < 0)
+ return NULL;
+
+ f = fdopen(fd, "r");
+ if (!f)
+ close(fd);
+
+ return f;
+}
+
+static size_t read_fdinfo(char *buf, const size_t sz, DIR *at, const char *name)
+{
+ size_t count;
+ FILE *f;
+
+ f = fropenat(at, name);
+ if (!f)
+ return 0;
+
+ memset(buf, 0, sz);
+ count = fread(buf, 1, sz, f);
+ fclose(f);
+
+ return count;
+}
+
+static bool parse_engine(char *line, struct drm_client_fdinfo *info)
+{
+ static const char *e2class[] = {
+ "render",
+ "copy",
+ "video",
+ "video-enhance",
+ };
+ bool found = false;
+ char name[256];
+ unsigned int i;
+ uint64_t val;
+ char *t;
+
+ t = line;
+ while (!isdigit(*t))
+ t++;
+ val = strtoull(t, NULL, 10);
+
+ t = line;
+ while (*t != ':')
+ t++;
+ *t = 0;
+
+ if (sscanf(line, "drm-engine-%s", name) != 1)
+ return false;
+
+ for (i = 0; i < ARRAY_SIZE(e2class); i++) {
+ if (!strcmp(name, e2class[i])) {
+ info->busy[i] = val;
+ found = true;
+ break;
+ }
+ }
+
+ return found;
+}
+
+bool
+__igt_parse_drm_fdinfo(DIR *dir, const char *fd, struct drm_client_fdinfo *info)
+{
+ char buf[4096], *_buf = buf;
+ char *l, *ctx = NULL;
+ unsigned int good = 0;
+ size_t count;
+
+ count = read_fdinfo(buf, sizeof(buf), dir, fd);
+ if (!count)
+ return false;
+
+ while ((l = strtok_r(_buf, "\n", &ctx))) {
+ _buf = NULL;
+
+ if (sscanf(l, "drm-driver:\t%s", info->driver)) {
+ good++;
+ } else if (sscanf(l, "drm-pdev:\t%s", info->pdev)) {
+ good++;
+ } else if (sscanf(l, "drm-client-id:\t%lu", &info->id) == 1) {
+ good++;
+ } else if (!strncmp(l, "drm-engine-", 11)) {
+ if (parse_engine(l, info))
+ info->num_engines++;
+ }
+ }
+
+ if (good < 3 || !info->num_engines)
+ return false; /* fdinfo format not as expected */
+
+ return true;
+}
+
+bool igt_parse_drm_fdinfo(int drm_fd, struct drm_client_fdinfo *info)
+{
+ char fd[64];
+ DIR *dir;
+ bool res;
+ int ret;
+
+ ret = snprintf(fd, sizeof(fd), "%u", drm_fd);
+ if (ret < 0 || ret == sizeof(fd))
+ return false;
+
+ dir = opendir("/proc/self/fdinfo");
+ if (!dir)
+ return false;
+
+ res = __igt_parse_drm_fdinfo(dir, fd, info);
+
+ closedir(dir);
+
+ return res;
+}
diff --git a/lib/igt_drm_fdinfo.h b/lib/igt_drm_fdinfo.h
new file mode 100644
index 000000000000..103cf5562cbe
--- /dev/null
+++ b/lib/igt_drm_fdinfo.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright © 2022 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.
+ *
+ */
+
+#ifndef IGT_DRM_FDINFO_H
+#define IGT_DRM_FDINFO_H
+
+#include <sys/types.h>
+#include <dirent.h>
+#include <stdint.h>
+#include <stdbool.h>
+
+struct drm_client_fdinfo {
+ char driver[128];
+ char pdev[128];
+ unsigned long id;
+
+ unsigned int num_engines;
+ uint64_t busy[16];
+};
+
+bool igt_parse_drm_fdinfo(int drm_fd, struct drm_client_fdinfo *info);
+
+bool __igt_parse_drm_fdinfo(DIR *dir, const char *fd,
+ struct drm_client_fdinfo *info);
+
+#endif /* IGT_DRM_FDINFO_H */
diff --git a/lib/meson.build b/lib/meson.build
index b9568a71bf46..b456db809e98 100644
--- a/lib/meson.build
+++ b/lib/meson.build
@@ -16,6 +16,7 @@ lib_sources = [
'igt_debugfs.c',
'igt_device.c',
'igt_device_scan.c',
+ 'igt_drm_fdinfo.c',
'igt_aux.c',
'igt_gt.c',
'igt_halffloat.c',
@@ -215,6 +216,12 @@ lib_igt_device_scan_build = static_library('igt_device_scan',
lib_igt_device_scan = declare_dependency(link_with : lib_igt_device_scan_build,
include_directories : inc)
+lib_igt_drm_fdinfo_build = static_library('igt_drm_fdinfo',
+ ['igt_drm_fdinfo.c'],
+ include_directories : inc)
+
+lib_igt_drm_fdinfo = declare_dependency(link_with : lib_igt_drm_fdinfo_build,
+ include_directories : inc)
i915_perf_files = [
'igt_list.c',
'i915/perf.c',
--
2.32.0
