Introduce intel-gpu-overlay

A realtime display of GPU activity. Note, this is just at the point of
minimum usability...

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 19 insertions, 0 deletions

diff --git a/overlay/gem-objects.c b/overlay/gem-objects.c
new file mode 100644
index 00000000..37d67263
--- /dev/null
+++ b/overlay/gem-objects.c
@@ -0,0 +1,19 @@
+#include <unistd.h>
+#include <fcntl.h>
+
+#include "gem-objects.h"
+
+int gem_objects_update(char *buf, int buflen)
+{
+	int fd, len = -1;
+
+	fd = open("/sys/kernel/debug/dri/0/i915_gem_objects", 0);
+	if (fd >= 0) {
+		len = read(fd, buf, buflen-1);
+		if (len >= 0)
+			buf[len] = '\0';
+		close(fd);
+	}
+
+	return len;
+}