diff options
| author | John Fastabend <john.r.fastabend@intel.com> | 2015-05-26 08:22:49 -0700 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2015-05-28 03:31:12 -0700 |
| commit | 8cf6f497de405ca9eb87ffb34d90699962d10125 (patch) | |
| tree | 1fd67ceca44c918edddc6170cea8a11b3000ff94 /include/uapi | |
| parent | ed2dfd900992aa7b6b3d0abd8ec9a7e9d2c7f827 (diff) | |
ethtool: Add helper routines to pass vf to rx_flow_spec
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.
CC: Alex Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/ethtool.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h index ae832b45b44c..0594933cdf55 100644 --- a/include/uapi/linux/ethtool.h +++ b/include/uapi/linux/ethtool.h @@ -796,6 +796,31 @@ 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 do flow + * steering and specify these queues the ring cookie is partitioned + * into a 32bit queue index with an 8 bit virtual function id. + * This also leaves the 3bytes for further specifiers. It is possible + * future devices may support more than 256 virtual functions if + * devices start supporting PCIe w/ARI. However at the moment I + * do not know of any devices that support this so I do not reserve + * space for this at this time. If a future patch consumes the next + * byte it should be aware of this possiblity. + */ +#define ETHTOOL_RX_FLOW_SPEC_RING 0x00000000FFFFFFFFLL +#define ETHTOOL_RX_FLOW_SPEC_RING_VF 0x000000FF00000000LL +#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, |