On Tue, Jan 09, 2018 at 12:57:33PM -0800, Stephen Hemminger wrote: > Use sysfs to allow supporting sub-channels. The userspace application > makes request to host to create sub-channels and the UIO kernel > driver populates the sysfs per-channel directory with a binary > attribute file that can be used to read/write ring. > > Signed-off-by: Stephen Hemminger <sthemmin@xxxxxxxxxxxxx> > --- > Documentation/driver-api/uio-howto.rst | 5 ++ > drivers/uio/uio_hv_generic.c | 95 ++++++++++++++++++++++++++++++++-- > 2 files changed, 97 insertions(+), 3 deletions(-) > > diff --git a/Documentation/driver-api/uio-howto.rst b/Documentation/driver-api/uio-howto.rst > index 693e3bd84e79..7d36a50c0484 100644 > --- a/Documentation/driver-api/uio-howto.rst > +++ b/Documentation/driver-api/uio-howto.rst > @@ -709,6 +709,11 @@ The vmbus device regions are mapped into uio device resources: > 3) Network receive buffer region > 4) Network send buffer region > > +If a subchannel is created by a request to host, then the uio_hv_generic > +device driver will create a sysfs binary file for the per-channel ring buffer. > +For example: > + /sys/bus/vmbus/devices/3811fe4d-0fa0-4b62-981a-74fc1084c757/channels/21/ring_buffer > + > Further information > =================== > No Documentation/ABI/ update for this new sysfs file? _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
