On Fri, Jun 08, 2012 at 04:28:58PM +0200, Dominic Eschweiler wrote: > Am Freitag, den 08.06.2012, 16:03 +0300 schrieb Michael S. Tsirkin: > > Why is this needed? > > What's wrong with mapping resources through > > /sys/bus/pci/devices/XXXXXresourceX > > ? > > > Mmmh ok, the problem here is, that the UIO documentation states: > > "/dev/uioX is used to access the address space of the card. Just use > mmap() to access registers or RAM locations of your card." > > and > > "From userspace, the different mappings are distinguished by adjusting > the offset parameter of the mmap() call." > > > This does not work and the "/sys/class/uio/uioX/maps/mapX/" directories > do also not appear. Then there's something fundamentally wrong in your driver. Check the return value of uio_register_device(). > I was very confused when I tried UIO the first time > and it did not behave like it is described in the documentation. UIO is the mainline since 2007, and I can assure you it works like described. Lots of people use it. Try and fix your driver, then post it. If you absolutely don't get it working, post a non-working version for review. Thanks, Hans -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
