From mboxrd@z Thu Jan 1 00:00:00 1970 From: John Fastabend Date: Mon, 18 May 2015 08:31:50 -0700 Subject: [Intel-wired-lan] [net-next PATCH v3 1/2] ethtool: Add helper routines to pass vf to rx_flow_spec Message-ID: <20150518153138.2807.96111.stgit@nitbit.x32> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: intel-wired-lan@osuosl.org List-ID: The ring_cookie is 64 bits wide which is much larger than can be used for actual queue index values. So provide some helper routines to pack a VF index into the cookie. This is useful to steer packets to a VF ring without having to know the queue layout of the device. Signed-off-by: John Fastabend --- include/uapi/linux/ethtool.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h index 2e49fc8..ecc658d 100644 --- a/include/uapi/linux/ethtool.h +++ b/include/uapi/linux/ethtool.h @@ -796,6 +796,26 @@ struct ethtool_rx_flow_spec { __u32 location; }; +/* How rings are layed out when accessing virtual functions or + * offloaded queues is device specific. To allow users to flow + * steering and specify these queues though break the ring cookie + * into a 32bit queue index with an 8 bit virtual function id. + * This also leaves the 3bytes for further specifiers. + */ +#define ETHTOOL_RX_FLOW_SPEC_RING 0x00000000FFFFFFFF +#define ETHTOOL_RX_FLOW_SPEC_RING_VF 0x000000FF00000000 +#define ETHTOOL_RX_FLOW_SPEC_RING_VF_OFF 32 +static inline __u64 ethtool_get_flow_spec_ring(__u64 ring_cookie) +{ + return ETHTOOL_RX_FLOW_SPEC_RING & ring_cookie; +}; + +static inline __u64 ethtool_get_flow_spec_ring_vf(__u64 ring_cookie) +{ + return (ETHTOOL_RX_FLOW_SPEC_RING_VF & ring_cookie) >> + ETHTOOL_RX_FLOW_SPEC_RING_VF_OFF; +}; + /** * struct ethtool_rxnfc - command to get or set RX flow classification rules * @cmd: Specific command number - %ETHTOOL_GRXFH, %ETHTOOL_SRXFH,