On Tue, Jan 31, 2017 at 09:35:58AM +0000, Gabriele Paoloni wrote: > I don't mind writing the patches but currently I also do not have a > platform to test on. > > Do you know if there is any Intel Server/Desktop with full support of > DPC on the RP including "Software Triggering of DPC" (maybe some > machines that are out on the market but you do not have there with you)? Currently available Intel offerings do not have eDPC capable root ports. I use switches from Microsemi and PLX with these capabilities on their downstream ports so I'm limited to non-root port testing at the moment. > As an alternative I am thinking that maybe I can find a switch with > full DPC support including "Software Triggering of DPC". In this case > we test anything except the RP Busy bit... > > The idea is to have a sort of DPC SW Injection module to test DPC. I think you can s/w inject from userspace with setpci: # setpci -s <B:D.f> ECAP_DPC+6.w=40:40 The port has to have a software trigger capability. I can get such a switch, but don't have one immediately available. Anyway, I'll write a couple patches and post them when I can get validation. Thank you for pointing out the current gaps. -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
