Functions to parse config ID and GT bit shift for PMU events.
Cc: Kamil Konieczny <kamil.konieczny@xxxxxxxxxxxxxxx>
Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@xxxxxxxxx>
---
lib/igt_perf.c | 68 ++++++++++++++++++++++++++++++++++++++++++++++++++
lib/igt_perf.h | 2 ++
2 files changed, 70 insertions(+)
diff --git a/lib/igt_perf.c b/lib/igt_perf.c
index 3866c6d77..fec07b2d3 100644
--- a/lib/igt_perf.c
+++ b/lib/igt_perf.c
@@ -92,6 +92,74 @@ const char *xe_perf_device(int xe, char *buf, int buflen)
return buf;
}
+/**
+ * perf_xe_format_gt_id:
+ * @device: Device string in driver:pci format
+ * Returns: The number of bits GT id is shifted in config
+ *
+ */
+int perf_xe_format_gt_shift(const char *device)
+{
+ char buf[150];
+ ssize_t ret;
+ int fd, start, end;
+
+ snprintf(buf, sizeof(buf),
+ "/sys/bus/event_source/devices/%s/format/gt_id",
+ device);
+
+ fd = open(buf, O_RDONLY);
+ if (fd < 0)
+ return -EINVAL;
+
+ ret = read(fd, buf, sizeof(buf) - 1);
+ close(fd);
+ if (ret < 1)
+ return ret;
+
+ buf[ret] = '\0';
+ ret = sscanf(buf, "config:%d-%d", &start, &end);
+ if (ret != 2)
+ return -EINVAL;
+
+ return start;
+}
+
+/**
+ * perf_xe_event_config:
+ * @device: Device string in driver:pci format
+ * @event: The event name
+ * @config: Pointer to the config
+ * Returns: 0 for success, negative value on error
+ */
+int perf_xe_event_config(const char *device, const char *event, uint64_t *config)
+{
+ char buf[150];
+ ssize_t ret;
+ int fd;
+
+ snprintf(buf, sizeof(buf),
+ "/sys/bus/event_source/devices/%s/events/%s",
+ device,
+ event);
+
+ fd = open(buf, O_RDONLY);
+ if (fd < 0)
+ return -EINVAL;
+
+ ret = read(fd, buf, sizeof(buf) - 1);
+ close(fd);
+ if (ret < 1)
+ return ret;
+
+ buf[ret] = '\0';
+ ret = sscanf(buf, "config=0x%lx", config);
+ if (ret != 1)
+ return -EINVAL;
+
+ return 0;
+}
+
uint64_t xe_perf_type_id(int xe)
{
char buf[80];
diff --git a/lib/igt_perf.h b/lib/igt_perf.h
index 3d9ba2917..2505e7a45 100644
--- a/lib/igt_perf.h
+++ b/lib/igt_perf.h
@@ -71,5 +71,7 @@ int perf_i915_open(int i915, uint64_t config);
int perf_i915_open_group(int i915, uint64_t config, int group);
int perf_xe_open(int xe, uint64_t config);
+int perf_xe_event_config(const char *device, const char *event, uint64_t *config);
+int perf_xe_format_gt_shift(const char *device);
#endif /* I915_PERF_H */
--
2.38.1
