netdev - RE: ixgbe: macvlan on PF/VF when SRIOV is enabled

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Date:	Sat, 22 May 2010 10:53:09 -0700
From:	"Rose, Gregory V" <gregory.v.rose@...el.com>
To:	Shirley Ma <mashirle@...ibm.com>,
	"Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>
CC:	"davem@...emloft.net" <davem@...emloft.net>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"e1000-devel@...ts.sourceforge.net" 
	<e1000-devel@...ts.sourceforge.net>
Subject: RE: ixgbe: macvlan on PF/VF when SRIOV is enabled

>-----Original Message-----
>From: netdev-owner@...r.kernel.org [mailto:netdev-owner@...r.kernel.org]
>On Behalf Of Shirley Ma
>Sent: Friday, May 21, 2010 1:31 PM
>To: Kirsher, Jeffrey T
>Cc: davem@...emloft.net; kvm@...r.kernel.org; netdev@...r.kernel.org;
>e1000-devel@...ts.sourceforge.net
>Subject: ixgbe: macvlan on PF/VF when SRIOV is enabled
>
>Hello Jeff,
>
>macvlan doesn't work on PF when SRIOV is enabled. Creating macvlan has
>been successful, but ping (icmp request) goes to VF interface not
>PF/macvlan even arp entry is correct. I patched ixgbe driver, and
>macvlan/PF has worked with the patch. But I am not sure whether it is
>right since I don't have the HW spec. What I did for ixgbe driver was:
>
>1. PF's rar index is 0, VMDQ index is adatper->num_vfs;
>2. VF's rar is based on rar_used_count and mc_addr_in_rar_count, VMDQ
>index is ;
>3. PF's secondary addresses is PF's rar index + i, VMDQ index is
>adapter->num_vfs.

As of 2.6.34 the ixgbe driver does not support multiple queues for macvlan.
Support for multiple queues for macvlan will come in a subsequent release.

>
>
>Before I submit the patch, I want to understand the right index
>assignment for both rar index and VMDQ index, when SRIOV enabled:
>1. VMDQ index for PF is adapter->num_vfs, or 0? rar index is 0?
>2. PF's secondary address rar index is based on
>rar_used_count/mc_addr_in_rar_count?
>2. VF's VPDQ index is based on vf number?
>3. VF's rar index is vf + 1, or should be based on rar_used_count?
>
>I am also working on macvlan on VF. The question here is whether macvlan
>on VF should work or not? Looks like ixgbevf secondary addresses are not
>in receiver address filter, so macvlan on VF doesn't work.

The VF driver does not support macvlan.  Future releases may but there
are no immediate plans to support it.

- Greg Rose
Intel Corp.
Lan Access Division