On Fri, 21 May 2021 at 13:28, Christian König <christian.koenig@xxxxxxx> wrote: > Am 21.05.21 um 14:22 schrieb Daniel Stone: > > Yeah, the 'second-generation Valhall' GPUs coming later this year / > > early next year are starting to get pretty weird. Firmware-mediated > > job scheduling out of multiple queues, userspace having direct access > > to the queues and can do inter-queue synchronisation (at least I think > > so), etc. For bonus points, synchronisation is based on $addr = $val > > to signal and $addr == $val to wait, with a separate fence primitive > > as well. > > Well that sounds familiar :) I laughed when I first saw it, because it was better than crying I guess. If you're curious, the interface definitions are in the csf/ directory in the 'Bifrost kernel driver' r30p0 download you can get from the Arm developer site. Unfortunately the exact semantics aren't completely clear. > > Obviously Arm should be part of this conversation here, but I guess > > we'll have to wait for a while yet to see how everything's shaken out > > with this new gen, and hope that whatever's been designed upstream in > > the meantime is actually vaguely compatible ... > > Yeah, going to keep you in CC when we start to code and review user fences. Awesome, thanks Christian. Appreciate it. :) Cheers, Daniel _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
