On Mon, 2011-05-16 at 12:28 -0700, Shirley Ma wrote: > Signed-off-by: Shirley Ma <[email protected]> > --- > > include/linux/netdevice.h | 10 ++++++++++ > 1 files changed, 10 insertions(+), 0 deletions(-) > > diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h > index a134d80..2646251 100644 > --- a/include/linux/netdevice.h > +++ b/include/linux/netdevice.h > @@ -1066,6 +1066,16 @@ struct net_device { > #define NETIF_F_NOCACHE_COPY (1 << 30) /* Use no-cache copyfromuser */ > #define NETIF_F_LOOPBACK (1 << 31) /* Enable loopback */ > > +/* > + * Bit 31 is for device to map userspace buffers -- zerocopy > + * Device can set this flag when it supports HIGHDMA. > + * Device can't recycle this kind of skb buffers. > + * There are 256 bytes copied, the rest of buffers are mapped. > + * The userspace callback should only be called when last reference to this > skb > + * is gone. > + */ > +#define NETIF_F_ZEROCOPY (1 << 31)
Sorry, bit 31 is taken. You get the job of turning features into a wider bitmap. Ben. -- Ben Hutchings, Senior Software Engineer, Solarflare Not speaking for my employer; that's the marketing department's job. They asked us to note that Solarflare product names are trademarked. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
