From cf1156a60e1d03a752cde0baadbc9ac8118b2a52 Mon Sep 17 00:00:00 2001 From: Christian Poessinger Date: Sun, 21 Feb 2021 18:22:04 +0100 Subject: ethernet: T3163: probe driver for maximum rx/tx ring-buffer size --- src/conf_mode/interfaces-ethernet.py | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) (limited to 'src') diff --git a/src/conf_mode/interfaces-ethernet.py b/src/conf_mode/interfaces-ethernet.py index bf4650773..e82a3e0f1 100755 --- a/src/conf_mode/interfaces-ethernet.py +++ b/src/conf_mode/interfaces-ethernet.py @@ -30,6 +30,7 @@ from vyos.configverify import verify_mtu from vyos.configverify import verify_mtu_ipv6 from vyos.configverify import verify_vlan_config from vyos.configverify import verify_vrf +from vyos.ethtool import Ethtool from vyos.ifconfig import EthernetIf from vyos.template import render from vyos.util import call @@ -82,11 +83,26 @@ def verify(ethernet): driver = EthernetIf(ifname).get_driver_name() # T3342 - Xen driver requires special treatment - if driver == "vif": + if driver == 'vif': if int(ethernet['mtu']) > 1500 and dict_search('offload.sg', ethernet) == None: raise ConfigError('Xen netback drivers requires scatter-gatter offloading '\ 'for MTU size larger then 1500 bytes') + ethtool = Ethtool(ifname) + if 'ring_buffer' in ethernet: + max_rx = ethtool.get_rx_buffer() + max_tx = ethtool.get_tx_buffer() + + rx = dict_search('ring_buffer.rx', ethernet) + if rx and int(rx) > int(max_rx): + raise ConfigError(f'Driver only supports a maximum RX ring-buffer '\ + f'size of "{max_rx}" bytes!') + + tx = dict_search('ring_buffer.tx', ethernet) + if tx and int(tx) > int(max_tx): + raise ConfigError(f'Driver only supports a maximum TX ring-buffer '\ + f'size of "{max_tx}" bytes!') + # XDP requires multiple TX queues if 'xdp' in ethernet: queues = glob(f'/sys/class/net/{ifname}/queues/tx-*') -- cgit v1.2.3