[igt-dev] [PATCH v4 01/14] drm-uapi/xe_drm: Align with new PMU interface
Francois Dugast
francois.dugast at intel.com
Thu Sep 28 11:05:03 UTC 2023
From: Rodrigo Vivi <rodrigo.vivi at intel.com>
Align with commit ("drm/xe/pmu: Enable PMU interface")
Cc: Francois Dugast <francois.dugast at intel.com>
Cc: Aravind Iddamsetty <aravind.iddamsetty at linux.intel.com>
Signed-off-by: Francois Dugast <francois.dugast at intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
---
include/drm-uapi/xe_drm.h | 40 +++++++++++++++++++++++++++++++++++++++
1 file changed, 40 insertions(+)
diff --git a/include/drm-uapi/xe_drm.h b/include/drm-uapi/xe_drm.h
index 804c02270..13cd6a73d 100644
--- a/include/drm-uapi/xe_drm.h
+++ b/include/drm-uapi/xe_drm.h
@@ -1053,6 +1053,46 @@ struct drm_xe_vm_madvise {
__u64 reserved[2];
};
+/**
+ * DOC: XE PMU event config IDs
+ *
+ * Check 'man perf_event_open' to use the ID's XE_PMU_XXXX listed in xe_drm.h
+ * in 'struct perf_event_attr' as part of perf_event_open syscall to read a
+ * particular event.
+ *
+ * For example to open the XE_PMU_INTERRUPTS(0):
+ *
+ * .. code-block:: C
+ *
+ * struct perf_event_attr attr;
+ * long long count;
+ * int cpu = 0;
+ * int fd;
+ *
+ * memset(&attr, 0, sizeof(struct perf_event_attr));
+ * attr.type = type; // eg: /sys/bus/event_source/devices/xe_0000_56_00.0/type
+ * attr.read_format = PERF_FORMAT_TOTAL_TIME_ENABLED;
+ * attr.use_clockid = 1;
+ * attr.clockid = CLOCK_MONOTONIC;
+ * attr.config = XE_PMU_INTERRUPTS(0);
+ *
+ * fd = syscall(__NR_perf_event_open, &attr, -1, cpu, -1, 0);
+ */
+
+/*
+ * Top bits of every counter are GT id.
+ */
+#define __XE_PMU_GT_SHIFT (56)
+
+#define ___XE_PMU_OTHER(gt, x) \
+ (((__u64)(x)) | ((__u64)(gt) << __XE_PMU_GT_SHIFT))
+
+#define XE_PMU_INTERRUPTS(gt) ___XE_PMU_OTHER(gt, 0)
+#define XE_PMU_RENDER_GROUP_BUSY(gt) ___XE_PMU_OTHER(gt, 1)
+#define XE_PMU_COPY_GROUP_BUSY(gt) ___XE_PMU_OTHER(gt, 2)
+#define XE_PMU_MEDIA_GROUP_BUSY(gt) ___XE_PMU_OTHER(gt, 3)
+#define XE_PMU_ANY_ENGINE_GROUP_BUSY(gt) ___XE_PMU_OTHER(gt, 4)
+
#if defined(__cplusplus)
}
#endif
--
2.34.1
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