On Fri, 2025-05-16 at 10:44 +0200, Christian König wrote: > Hi Thomas, > > On 5/16/25 10:33, Thomas Hellström wrote: > > Hi! > > > > I previously discussed this with Simona on IRC but would like to > > get > > some feedback also from a wider audience: > > > > We're planning to share dma-bufs using a fast interconnect in a way > > similar to pcie-p2p: > > > > The rough plan is to identify dma-bufs capable of sharing this way > > by > > looking at the address of either the dma-buf ops and / or the > > importer_ops to conclude it's a device using the same driver (or > > possibly child driver) and then take special action when the dma- > > addresses are obtained. Nothing visible outside of the xe driver or > > its > > child driver. > > As far as I can see that should work and we have recommended doing > exactly that to multiple people in the past. > > > Are there any absolute "DON'T"s or recommendations to keep in mind > > WRT > > to this approach? > > My only requirement is that you write up some documentation > (preferable either in drivers/dma-buf/dma-buf.c or > Documentation/driver-api/dma-buf.rst) how drivers should do this, > what the implications with the rest of the DMA-buf interface is > etc... etc... > > The goal is to nail down how to do driver private interfaces without > breaking interoperability with drivers who don't participate in that.
Ok, Will ensure that we adhere to this. Thanks, Thomas > > Regards, > Christian. > > > > > Thanks, > > Thomas > > > ) > _______________________________________________ > Linaro-mm-sig mailing list -- linaro-mm-...@lists.linaro.org > To unsubscribe send an email to linaro-mm-sig-le...@lists.linaro.org
