i915_perf_open_ioctl 2852 drivers/gpu/drm/i915/i915_drv.c 	DRM_IOCTL_DEF_DRV(I915_PERF_OPEN, i915_perf_open_ioctl, DRM_RENDER_ALLOW),
i915_perf_open_ioctl   22 drivers/gpu/drm/i915/i915_perf.h int i915_perf_open_ioctl(struct drm_device *dev, void *data,