From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Monjalon <thomas.monjalon-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
Subject: Re: Testing memnic for VM to VM transfer
Date: Wed, 02 Jul 2014 08:59:06 -0700 (PDT)
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To: Hiroshi Shimamoto <h-shimamoto-ehU+Cx/zZe18UrSeD/g0lQ@public.gmane.org>
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2014-06-18 12:06, Hiroshi Shimamoto:
> 2014-06-18 13:49, Thomas Monjalon:
> > 2014-06-18 11:42, Hiroshi Shimamoto:
> > > 2014-06-18 19:26, GongJinrong:
> > > > Do you have any idea that how to write a host application
> > > > to put the data to guest memnic PMD?
> > > 
> > > Yes, basically I made the MEMNIC interface work with DPDK vSwitch.
> > > 
> > > By the way, you can mmap() the shm which specified as the ivshmem and
> > > put
> > > the proper data to send a packet to guest PMD.
> > > I don't have time to make proper code, but can advise you;
> > > please see common/memnic.h and the memory layout.
> > > 1) Set magic and version in header on host.
> > > 2) Initialize PMD on guest.
> > > 3) Check the reset is 1 and set valid to 1, reset to 0 on host.
> > > 4) Use uplink area the default block size 4K.
> > > 
> > >    Set len and fill ether frame data, then set the status to 2 on host.
> > >    Guest PMD may receive the packet.
> > >    Proceed to the next packet block.
> > 
> > Such application should be integrated in memnic repository.
> > I know Olivier wrote one which could be sent on next week.
> 
> yeah, I just begin to feel to need such a software in the repository.

I've pushed the test application (host-sim) that Olivier wrote.
Feel free to improve it.

I think that we could also use the PMD driver in host side with some 
modifications.

-- 
Thomas