Re: [dpdk-dev] Testing memnic for VM to VM transfer

[GongJinrong <jinronggong@hotmail.com>]

Thanks Thomas，I will try it^^

-----Original Message-----
From: Thomas Monjalon [mailto:thomas.monjalon@6wind.com] 
Sent: Wednesday, July 02, 2014 11:59 PM
To: Hiroshi Shimamoto
Cc: GongJinrong; dev@dpdk.org; 'John Joyce (joycej)'; Olivier MATZ
Subject: Re: [dpdk-dev] Testing memnic for VM to VM transfer

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