diff options
| author | Jakub Kicinski <kuba@kernel.org> | 2022-01-27 10:42:59 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-01-28 14:43:47 +0000 |
| commit | 9690ae60429020f38e4aa2540c306f27eb021bc0 (patch) | |
| tree | 05901b52f36783cdd5b53e2327752792304dc575 /include/uapi/linux/ethtool_netlink.h | |
| parent | 1a918a32cd1fbb3789e80d0d801533d1b9516b24 (diff) | |
ethtool: add header/data split indication
For applications running on a mix of platforms it's useful
to have a clear indication whether host's NIC supports the
geometry requirements of TCP zero-copy. TCP zero-copy Rx
requires data to be neatly placed into memory pages.
Most NICs can't do that.
This patch is adding GET support only, since the NICs
I work with either always have the feature enabled or
enable it whenever MTU is set to jumbo. In other words
I don't need SET. But adding set should be trivial.
(The only note on SET is that we will likely want
the setting to be "sticky" and use 0 / `unknown`
to reset it back to driver default.)
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/uapi/linux/ethtool_netlink.h')
| -rw-r--r-- | include/uapi/linux/ethtool_netlink.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h index cca6e474a085..417d4280d7b5 100644 --- a/include/uapi/linux/ethtool_netlink.h +++ b/include/uapi/linux/ethtool_netlink.h @@ -319,6 +319,12 @@ enum { /* RINGS */ enum { + ETHTOOL_TCP_DATA_SPLIT_UNKNOWN = 0, + ETHTOOL_TCP_DATA_SPLIT_DISABLED, + ETHTOOL_TCP_DATA_SPLIT_ENABLED, +}; + +enum { ETHTOOL_A_RINGS_UNSPEC, ETHTOOL_A_RINGS_HEADER, /* nest - _A_HEADER_* */ ETHTOOL_A_RINGS_RX_MAX, /* u32 */ @@ -330,6 +336,7 @@ enum { ETHTOOL_A_RINGS_RX_JUMBO, /* u32 */ ETHTOOL_A_RINGS_TX, /* u32 */ ETHTOOL_A_RINGS_RX_BUF_LEN, /* u32 */ + ETHTOOL_A_RINGS_TCP_DATA_SPLIT, /* u8 */ /* add new constants above here */ __ETHTOOL_A_RINGS_CNT, |