On Thu, Feb 10, 2011 at 7:41 PM, Nicholas A. Bellinger <nab@xxxxxxxxxxxxxxx> wrote: > > On Thu, 2011-02-10 at 13:48 +0100, Hannes Reinecke wrote: > > > > On 02/10/2011 01:21 PM, FUJITA Tomonori wrote: > > > Finally, I have the working driver. We are ready to remove the old > > > ibmvstgt driver. > > > > > Hmm. Wouldn't it be possible to use it as a template for a > > virtio-srp target? > > From what I've seen we 'just' need to modify it to use virtio > > instead for pSeries rdma callbacks. > > And then we would have a virtio-srp target onto which any kvm guests > > could connect to. One should keep in mind that there exist two kinds of SRP drivers for Linux: - Those based on synchronous data transfer calls - calls that only return after the entire transfer has finished. The ibmvscsi, ibmvscsis drivers and the libsrp library fall in this category. - Those based on asynchronous data transfers - calls that return immediately and where a callback function is invoked to report completion. ib_srp and ib_srpt fall into this category (ib_srp is upstream, ib_srpt not yet). As far as I know the virtio interface uses callbacks and hence is an asynchronous interface ? If so, the InfiniBand drivers might be a better starting point. Bart. -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
