On Wed, Jul 22, 2015 at 09:03:53AM -0500, Jeremy White wrote: > On 07/09/2015 05:06 AM, Alex Elsayed wrote: > >Alan Stern wrote: > > > >>On Mon, 6 Jul 2015, Jeremy White wrote: > >> > >>>Anything else fundamental to usbip that should inform the design of a > >>>usbredir driver? usbip appears to be based off a 2004 vintage of > >>>dummy_hcd. I'll look thoughtfully at the current dummy_hcd; please let > >>>me know if there is anything else I should consider. > >> > >>One thing that springs to mind is USB-3 streams. When dummy-hcd was > >>expanded to include USB-3, that was the major new ingredient. > > > >Another thing that comes to mind is that the USB-IF has its own official > >standard for this kind of thing now, called Media-Agnostic USB[1]. In > >November of 2014 a driver[2] was posted, followed by a second version[3], > >and it is apparently being refined inside Intel[4]. > > > >[1] > >http://www.usb.org/developers/docs/devclass_docs/Media_Agnostic_USB_v1.0.zip > >[2] http://thread.gmane.org/gmane.linux.kernel/1820297 > >[3] http://thread.gmane.org/gmane.linux.drivers.driver-project.devel/60498 > >[4] http://article.gmane.org/gmane.linux.drivers.driver-project.devel/60757 > > Thanks for the pointer, Alex. > > I spent some time with the spec and their proposed code. It does seem > plausible that XSpice could use a mausb/usbredir protocol converter. So if > there was a mausb kernel module, I could potentially implement support in > XSpice in user space and not need a usbredir module. > > I sent an email to the two developers at Intel to ask if there had been any > further progress and if I could collaborate with them. I have not heard > back. > > The MA spec is substantial and seems well thought out. But the usbredir > protocol has the virtue of being relatively mature - it's 5 years old, with > code in daily use. > > At this point it seems the best path forward is to continue work on the > usbredir kernel module, which I will do unless I get some new information. Please work with the existing people, or with the existing spec, I don't want to be adding multiple versions of this type of protocol to the kernel. As it is, I really don't even want to take your code, given that usbip is already there. Ignoring it isn't ok. thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
