RE: [PATCH rdma-core 3/5] pyverbs: Add dma-buf based MR support

Xiong, Jianxin
2020-11-25T19:27:21Z

> -----Original Message-----
> From: Jason Gunthorpe <jgg@ziepe.ca>
> Sent: Wednesday, November 25, 2020 4:15 AM
> To: Daniel Vetter <daniel@ffwll.ch>
> Cc: Xiong, Jianxin <jianxin.xiong@intel.com>; Leon Romanovsky <leon@kernel.org>; linux-rdma@vger.kernel.org; dri-
> devel@lists.freedesktop.org; Doug Ledford <dledford@redhat.com>; Vetter, Daniel <daniel.vetter@intel.com>; Christian Koenig
> <christian.koenig@amd.com>
> Subject: Re: [PATCH rdma-core 3/5] pyverbs: Add dma-buf based MR support
>
> On Wed, Nov 25, 2020 at 11:50:41AM +0100, Daniel Vetter wrote:
>
> > Yeah imo makes sense. It's a bunch more code for you to make it work
> > on
> > i915 and amd, but it's not terrible. And avoids the dependencies, and
> > also avoids the abuse of card* and dumb buffers. Plus not really more
> > complex, you just need a table or something to match from the drm
> > driver name to the driver-specific buffer create function. Everything
> > else stays the same.
>
> If it is going to get more complicated please write it in C then. We haven't done it yet, but you can link a C function through cython to the
> python test script
>
> If you struggle here I can probably work out the build system bits, but it should not be too terrible

Thanks Daniel and Jason. I have started working in this direction. There should be no
technical obstacle here.