On Wed, Nov 25, 2020 at 07:27:07PM +0000, Xiong, Jianxin wrote:
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.
Just to be clear I mean write some 'get dma buf fd' function in C, not the whole test
Jason