Re: [PATCH 00/16] Add OA functionality to Xe

["Dixit, Ashutosh" <ashutosh.dixit@intel.com>]

On Thu, 08 Feb 2024 13:34:42 -0800, Lionel Landwerlin wrote:
>

Hi Lionel,

> Just looked at the series and I'm not seeing a way to reconfigure the OA
> unit with a different config once the stream is opened.
> Was this feature removed?

No, it's still there. Search for 'xe_oa_config_locked' here:

https://patchwork.freedesktop.org/patch/577445/?series=121084&rev=9

In Xe, because there are multiple stream types, we have a PERF layer. OA is
one of the stream types. So these operations are part of the PERF layer now:

/**
 * enum drm_xe_perf_ioctls - Perf fd ioctl's
 *
 * Information exchanged between userspace and kernel for perf fd ioctl's
 * is stream type specific
 */
enum drm_xe_perf_ioctls {
	/** @DRM_XE_PERF_IOCTL_ENABLE: Enable data capture for a stream */
	DRM_XE_PERF_IOCTL_ENABLE = _IO('i', 0x0),

	/** @DRM_XE_PERF_IOCTL_DISABLE: Disable data capture for a stream */
	DRM_XE_PERF_IOCTL_DISABLE = _IO('i', 0x1),

	/** @DRM_XE_PERF_IOCTL_CONFIG: Change stream configuration */
	DRM_XE_PERF_IOCTL_CONFIG = _IO('i', 0x2),

	/** @DRM_XE_PERF_IOCTL_STATUS: Return stream status */
	DRM_XE_PERF_IOCTL_STATUS = _IO('i', 0x3),

	/** @DRM_XE_PERF_IOCTL_INFO: Return stream info */
	DRM_XE_PERF_IOCTL_INFO = _IO('i', 0x4),
};

Thanks.
--
Ashutosh