Date: Sun, 16 Nov 2008 16:08:51 +0100 From: Max Laier <max@love2party.net> To: freebsd-hackers@freebsd.org Cc: Yehonatan Yossef <yoniy@mellanox.co.il>, Yony Yossef <yonyossef.lists@gmail.com> Subject: Re: VLAN offloads on FreeBSD 6.3 & 7.0 Message-ID: <200811161608.51813.max@love2party.net> In-Reply-To: <20def4870811160610l5289267erfd7abafb9916b706@mail.gmail.com> References: <20def4870811160610l5289267erfd7abafb9916b706@mail.gmail.com>
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On Sunday 16 November 2008 15:10:19 Yony Yossef wrote: > Hi All, > > I'm working on an Ethernet driver for FreeBSD, currently implementing > VLAN offloads. > I have two problems, one is enabling TSO over the VLAN interface and > the second is enabling the VLAN filtering offload. > > About the TSO problem, I'm currently suffering a hugh performance > penalty since I have no TSO enabled over my vlan interfaces. > When I create a VLAN interface it does not inherit the features of > it's mother-interface, e.g. IFCAP_TSO. > Can it be done on FreeBSD 6.3 / 7.0 ? > > Second, my NIC is capable of holding a vlan table on HW, filtering > vlans on it's own, now I need to find a way to update that HW table > with added/deleted VLANs in order to use that VLAN filtering offload. > One way is to recieve a ioctl from the OS of it's vlan table events > (add, remove). I can't find such ioctl. > > Second way is to have direct access from the driver to the OS vlan > table. I'm not familiar with the interface though (something parallel > to vlan_group_get_device on linux) or if it's possible at all, can > anyone help on this one? See http://svn.freebsd.org/viewvc/base?view=revision&revision=180510 for the VLAN tag issue. Simply EVENTHANDLER_REGISTER a function in your driver to update the hw-table on config/unconfig events. I hope this helps. -- /"\ Best regards, | mlaier@freebsd.org \ / Max Laier | ICQ #67774661 X http://pf4freebsd.love2party.net/ | mlaier@EFnet / \ ASCII Ribbon Campaign | Against HTML Mail and News
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