On Wed, Mar 13, 2019 at 03:38:44PM +0100, Timur Kristóf wrote: > On Wed, 2019-03-13 at 07:34 -0700, Greg KH wrote: > > On Wed, Mar 13, 2019 at 02:16:47PM +0100, Timur Kristóf wrote: > > > Hi, > > > > > > PCI-E atomics don't work for me with a Thunderbolt 3 bridge. > > > I see the following message from my Thunderbolt 3 eGPU in dmesg: > > > > > > kfd: skipped device 1002:67df, PCI rejects atomics > > > > > > Hardware is a Dell XPS 13 9370 (with i7-8550U CPU) connected to a > > > Zotac > > > AMP mini, with an AMD RX 570 graphics card. Due to this, I cannot > > > use > > > the GPU for OpenCL, because the compute stack requires PCI-E > > > atomics > > > support [1]. > > > > > > What could be the problem? Is this a hardware limitation or a > > > missing > > > feature in the Linux TB driver? > > > > I would suggest asking the Linux thunderbolt driver authors and the > > graphics developers. Us USB developers have nothing to do with that > > :) > > > > Thanks Greg! > I couldn't find a mailing list for Thunderbolt so I assumed the TB > driver authors hang out on this mailing list. If not, sorry for the > noise! Please let me know which mailing list (or what other place) is > appropriate to ask this question. Look in the MAINTAINERS file for the thunderbolt maintainers and mailing list. Hm, they don't seem to have their own mailing list. Just send it to them and cc: the drm mailing lists as that's where the graphics developers are too. good luck! greg k-h
