tx path circular buffer

tx path circular buffer

[Tobin C. Harding]

Hi,

I am attempting to implement a circular buffer for the tx path of a
networking driver. From my understanding this is something that is
very common, yet I am struggling to find a clear way to do it.

I have tried to read the source for ath6kl, brcmfmac without
success.

I have read Documentation/circular-buffers.txt and this seems like the
solution however grep'ing drivers/net hints that this is not that
common a way to solve this problem. Also I'm getting in knots with
atomic_t types when copying the text document.

Before I bore you with all my non-working code, does any one please
know, off the top of their heads, a driver with simple-ish / nice clean
implementation that I can learn from?

thanks,
Tobin.

tx path circular buffer

[Greg KH]

On Wed, Jun 07, 2017 at 04:03:33PM +1000, Tobin C. Harding wrote:
> Hi,
> 
> I am attempting to implement a circular buffer for the tx path of a
> networking driver. From my understanding this is something that is
> very common, yet I am struggling to find a clear way to do it.

Have you looked at include/linux/kfifo.h?

tx path circular buffer

[Tobin C. Harding]

On Wed, Jun 07, 2017 at 10:48:33AM +0200, Greg KH wrote:
> On Wed, Jun 07, 2017 at 04:03:33PM +1000, Tobin C. Harding wrote:
> > Hi,
> > 
> > I am attempting to implement a circular buffer for the tx path of a
> > networking driver. From my understanding this is something that is
> > very common, yet I am struggling to find a clear way to do it.
> 
> Have you looked at include/linux/kfifo.h?

thanks Greg, I ended up using kfifo for the tx path and circ_buf for
the rx path.

Tobin.