On Friday, July 22, 2016 10:46:41 PM John Baldwin wrote: > Author: jhb > Date: Fri Jul 22 22:46:41 2016 > New Revision: 303205 > URL: https://svnweb.freebsd.org/changeset/base/303205 > > Log: > Add a driver to create VF devices on Chelsio T4/T5 NICs. > > Chelsio NICs are a bit unique compared to some other NICs in that they > expose different functionality on different physical functions. In > particular, PF4 is used to manage the NIC interfaces ('t4nex' and 't5nex'). > However, PF4 is not able to create VF devices. Instead, VFs are only > supported by physical functions 0 through 3. This commit adds 't4iov' > and 't5iov' drivers that attach to PF0-3. > > One extra wrinkle is that the iov devices cannot enable SR-IOV until the > firwmare has been initialized by the main PF4 driver. To handle this > case, a new t4_if kobj interface has been added to permit cross-calls > between the PF drivers. The PF4 driver notifies sibling drivers when it > is fully attached. It also requests sibling drivers to detach before it > detaches. Sibling drivers query the PF4 driver during their attach > routine to see if it is attached. If not, the sibling drivers defer > their attach actions until the PF4 driver informs them it is attached. > > VF devices are associated with a single port on the NIC. VF devices > created from PF0 are associated with the first port on the NIC, VFs > from PF1 are associated with the second port, etc. VF devices can > only be created from a PF device that has an associated port. Thus, > on a 2-port card, VFs are only supported on PF0 and PF1. > > Reviewed by: np (earlier versions) > MFC after: 1 month > Sponsored by: Chelsio Communications
Note that this only permits the creation of VFs, it does not include a driver for these VFs. I have a mostly working driver, but it is against an older HEAD and has to be rebased. In addition, Linux VF drivers will not work without some hacks to the FreeBSD cxgbe/cxl driver because the Linux VF driver only wants page-sized buffers whereas the FreeBSD drivers use 2k buffers (since that is an mbuf cluster). -- John Baldwin _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
