On Wed, Oct 22, 2014 at 7:37 AM, Zhu, Heqing <heqing.zhu at intel.com> wrote:
> One line comment inline. > > > -----Original Message----- > > From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Liang, Cunming > > Sent: Tuesday, October 21, 2014 8:33 PM > > To: Alex Markuze > > Cc: dev at dpdk.org > > Subject: Re: [dpdk-dev] nic loopback > > > > It?s a pain VF can?t set the register directly. > > As kernel ixgbe don?t support to set the value, I?m afraid you have to > modify > > kernel ixgbe. > > If your purpose is mainly for testing purpose. > > One option is you can just set the register bit value to full 1 during > device > > initialization. > > Another option is you can choose to use DPDK as host PF. > > Running testpmd in host, and set such register by interactive command > line. > > > > Ideally it?s better to add a kind of VF to PF mailbox message. > > Host PF delegate VF to enable the local pool loopback. > > So during runtime, VF can proactive to enable/disable the ability. > > [heqing] Such a proposal has been discussed a few times, but the kernel > driver does not accept this due to the security concern. I will try a different approach, Is there a tool available by intel for 82599 nics that can access the NIC's configuration and modify these registers manually? w/o Modifying hypervisor drivers and/or using PF? > > > > > > > From: Alex Markuze [mailto:alex at weka.io] > > Sent: Tuesday, October 21, 2014 11:16 PM > > To: Liang, Cunming > > Cc: dev at dpdk.org > > Subject: Re: [dpdk-dev] nic loopback > > > > How can I set/query this bit (LLE(PFVMTXSW[n]), intel 82599 ) on ESX, or > any > > other friendlier environment like Linux? > > > > On Tue, Oct 21, 2014 at 4:18 AM, Liang, Cunming > > <cunming.liang at intel.com<mailto:cunming.liang at intel.com>> wrote: > > > > > > > -----Original Message----- > > > From: dev > > [mailto:dev-bounces at dpdk.org<mailto:dev-bounces at dpdk.org>] > > > On Behalf Of Alex Markuze > > > Sent: Tuesday, October 21, 2014 12:24 AM > > > To: dev at dpdk.org<mailto:dev at dpdk.org> > > > Subject: [dpdk-dev] nic loopback > > > > > > Hi, > > > I'm trying to send packets from an application to it self, meaning > > > smac == dmac. > > > I'm working with intel 82599 virtual function. But it seems that these > > > packets are lost. > > > > > > Is there a software/hw limitation I'm missing here (some additional > > > anti-spoofing)? AFAIK modern NICs with sriov are mini switches so the > > > hw loopback should work, at least thats the theory. > > > > > [Liang, Cunming] You could have a check on register LLE(PFVMTXSW[n]). > > Which allow an individual pool to be able to send traffic and have it > loopback > > to itself. > > > > > > Thanks. > >
