> Tomas Telensky (tomas@xxxxxxxxx) wrote: > > > > > > > >I'm looking in sources of e100 network driver. I can't find meaning "RFDs" > > > >and > > > >"RBDs" anywhere... Does any of you know what these abbreviations mean? > > > > > > > > > > grep'ing in drivers/net/e100 gave : > > > > > > e100.h:/* Receive Buffer Descriptor (RBD)*/ > > > e100.h:/* Receive Frame Descriptor (RFD) - will be using the simple model*/ > > > > Thanks :) > > > > Does anyone know what it is - what it serves for? > > Hi, > > Go further reading code. > a 1 second search on : http://lxr.linux.no/source/drivers/net/e100.c > gives me : > <snip> > IV. Recieve > "The Receive Frame Area (RFA) comprises a ring of Receive > Descriptors (RFD) + data buffer, thus forming the simplified mode > memory structure. Rx skbs are allocated to contain both the RFD > and the data buffer, but the RFD is pulled off before the skb is > indicated. The data buffer is aligned such that encapsulated > protocol headers are u32-aligned. Since the RFD is part of the > mapped shared memory, and completion status is contained within > the RFD, the RFD must be dma_sync'ed to maintain a consistent > view from software and hardware." > <snip> > > I think all is in the code. Hi Christophe, thanks. This is source from 2.6 kernel but I was looking 2.4 (the driver was rewritten completely). But anyway, this comment helps. Tomas -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
