On 25.10.2021 15:11:49, Marc Kleine-Budde wrote: > On 14.10.2021 19:39:41, Guangbin Huang wrote: > > From: Hao Chen <chenhao288@xxxxxxxxxxxxx> > > > > Add two new parameters ringparam_ext and extack for > > .get_ringparam and .set_ringparam to extend more ring params > > through netlink. > > > > Signed-off-by: Hao Chen <chenhao288@xxxxxxxxxxxxx> > > Signed-off-by: Guangbin Huang <huangguangbin2@xxxxxxxxxx> > > While discussing a different ethtool ring param extension, Let me explain my requirements: There is a not Ethernet based bus system, called CAN (mainly used in the automotive and industrial world). It comes in 2 different generations or modes (CAN-2.0 and CAN-FD) and the 3rd one CAN-XL has already been specified. Due to different frame sizes used in these CAN modes and HW limitations, we need the possibility to set a RX/TX ring configuration for each of these modes. The approach Andrew suggested is two-fold. First introduce a "struct ethtool_kringparam" that's only used inside the kernel, as "struct ethtool_ringparam" is ABI. Then extend "struct ethtool_kringparam" as needed. regards, Marc -- Pengutronix e.K. | Marc Kleine-Budde | Embedded Linux | https://www.pengutronix.de | Vertretung West/Dortmund | Phone: +49-231-2826-924 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
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