Hi Thomas, > -----Original Message----- > From: Thomas Monjalon <tho...@monjalon.net> > Sent: Thursday, June 10, 2021 9:23 PM > To: Yigit, Ferruh <ferruh.yi...@intel.com> > Cc: Xueming Li <xuemi...@nvidia.com>; Viacheslav Ovsiienko > <viachesl...@nvidia.com>; dev@dpdk.org; Xia, Chenbo <chenbo....@intel.com> > Subject: Re: [dpdk-dev] [RFC 00/14] mlx5: support SubFunction > > 10/06/2021 12:33, Ferruh Yigit: > > On 5/27/2021 2:37 PM, Xueming Li wrote: > > > SubFunction [1] is a portion of the PCI device, a SF netdev has its > own > > > dedicated queues(txq, rxq). A SF shares PCI level resources with other > > > SFs and/or with its parent PCI function. Auxiliary bus is the > > > fundamental of SF. > > > > > > This patch set introduces SubFunction support for mlx5 PMD driver > > > including class net, regex, vdpa and compress. > > > > > > > There is already an mdev patch, originated from long ago. Aren't > subfunctions > > presented as mdev device? If so can't we use mdev for it? > > No unfortunately that's different. > mlx5 SF is based on top of auxiliary bus in the kernel/sysfs. >
Just out of curiosity: Does SF use mdev before aux bus is introduced in kernel. I see some history of it but am not sure: [1] seems SF was base on mdev. [2] seems BlueField software v2.5 is using mdev for SF. I saw it yesterday and try to figure out the history. Since you are here, guess you know something 😊 [1] https://patchwork.ozlabs.org/project/netdev/cover/20191107160448.20962-1-pa...@mellanox.com/ [2] https://docs.mellanox.com/display/BlueFieldSWv25011176/Mediated+Devices
