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| author | Michal Kubecek <mkubecek@suse.cz> | 2020-03-12 23:08:38 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-03-13 01:32:33 +0300 |
| commit | 0c84979c951a85fcb5c77ac2480fd476e283a07c (patch) | |
| tree | 83256438a6a5aeb2658d6e52b9b154fd1785e741 /Documentation/networking | |
| parent | bc9d1c995ecb8cccaac8ead2ed570544c2c885eb (diff) | |
| download | linux-0c84979c951a85fcb5c77ac2480fd476e283a07c.tar.xz | |
ethtool: provide channel counts with CHANNELS_GET request
Implement CHANNELS_GET request to get channel counts of a network device.
These are traditionally available via ETHTOOL_GCHANNELS ioctl request.
Omit attributes for channel types which are not supported by driver or
device (zero reported for maximum).
v2: (all suggested by Jakub Kicinski)
- minor cleanup in channels_prepare_data()
- more descriptive channels_reply_size()
- omit attributes with zero max count
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/networking')
| -rw-r--r-- | Documentation/networking/ethtool-netlink.rst | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst index 026a5fd4a08b..decbbddfd8be 100644 --- a/Documentation/networking/ethtool-netlink.rst +++ b/Documentation/networking/ethtool-netlink.rst @@ -195,6 +195,7 @@ Userspace to kernel: ``ETHTOOL_MSG_PRIVFLAGS_SET`` set private flags ``ETHTOOL_MSG_RINGS_GET`` get ring sizes ``ETHTOOL_MSG_RINGS_SET`` set ring sizes + ``ETHTOOL_MSG_CHANNELS_GET`` get channel counts ===================================== ================================ Kernel to userspace: @@ -217,6 +218,7 @@ Kernel to userspace: ``ETHTOOL_MSG_PRIVFLAGS_NTF`` private flags ``ETHTOOL_MSG_RINGS_GET_REPLY`` ring sizes ``ETHTOOL_MSG_RINGS_NTF`` ring sizes + ``ETHTOOL_MSG_CHANNELS_GET_REPLY`` channel counts ===================================== ================================= ``GET`` requests are sent by userspace applications to retrieve device @@ -695,6 +697,32 @@ driver. Driver may impose additional constraints and may not suspport all attributes. +CHANNELS_GET +============ + +Gets channel counts like ``ETHTOOL_GCHANNELS`` ioctl request. + +Request contents: + + ==================================== ====== ========================== + ``ETHTOOL_A_CHANNELS_HEADER`` nested request header + ==================================== ====== ========================== + +Kernel response contents: + + ===================================== ====== ========================== + ``ETHTOOL_A_CHANNELS_HEADER`` nested reply header + ``ETHTOOL_A_CHANNELS_RX_MAX`` u32 max receive channels + ``ETHTOOL_A_CHANNELS_TX_MAX`` u32 max transmit channels + ``ETHTOOL_A_CHANNELS_OTHER_MAX`` u32 max other channels + ``ETHTOOL_A_CHANNELS_COMBINED_MAX`` u32 max combined channels + ``ETHTOOL_A_CHANNELS_RX_COUNT`` u32 receive channel count + ``ETHTOOL_A_CHANNELS_TX_COUNT`` u32 transmit channel count + ``ETHTOOL_A_CHANNELS_OTHER_COUNT`` u32 other channel count + ``ETHTOOL_A_CHANNELS_COMBINED_COUNT`` u32 combined channel count + ===================================== ====== ========================== + + Request translation =================== @@ -765,7 +793,7 @@ have their netlink replacement yet. ``ETHTOOL_SRXFHINDIR`` n/a ``ETHTOOL_GFEATURES`` ``ETHTOOL_MSG_FEATURES_GET`` ``ETHTOOL_SFEATURES`` ``ETHTOOL_MSG_FEATURES_SET`` - ``ETHTOOL_GCHANNELS`` n/a + ``ETHTOOL_GCHANNELS`` ``ETHTOOL_MSG_CHANNELS_GET`` ``ETHTOOL_SCHANNELS`` n/a ``ETHTOOL_SET_DUMP`` n/a ``ETHTOOL_GET_DUMP_FLAG`` n/a |