On 3/16/2016 7:26 AM, Panu Matilainen wrote: > On 03/14/2016 05:32 PM, Ferruh Yigit wrote: >> On 3/9/2016 11:17 AM, Ferruh Yigit wrote: >>> This patch sent to keep record of latest status of the work. >>> >>> >>> This is slow data path communication implementation based on existing KNI. >>> >>> Difference is: librte_kni converted into a PMD, kdp kernel module is almost >>> same except all control path functionality removed and some simplification >>> done. >>> >>> Motivation is to simplify slow path data communication. >>> Now any application can use this new PMD to send/get data to Linux kernel. >>> >>> PMD supports two communication methods: >>> >>> 1) KDP kernel module >>> PMD initialization functions handles creating virtual interfaces (with help >>> of >>> kdp kernel module) and created FIFO. FIFO is used to share data between >>> userspace and kernelspace. This is default method. >>> >>> 2) tun/tap module >>> When KDP module is not inserted, PMD creates tap interface and transfers >>> packets using tap interface. >>> >>> In long term this patch intends to replace the KNI and KNI will be >>> depreciated. >>> >> >> Self-NACK: Will work on another option that does not introduce new >> kernel module. >> > > Hmm, care to elaborate a bit? The second mode of this PMD already was > free of external kernel modules. Do you mean you'll be just removing > mode 1) from the PMD or looking at something completely different? > > Just thinking that tun/tap PMD sounds like a useful thing to have, I > hope you're not abandoning that. >
It will be KNI PMD. Plan is to have something like KDP, but with existing KNI kernel module. There will be tun/tap support as fallback. Regards, ferruh