Re: How to create library module with callbacks?

["Arend van Spriel" <arend@broadcom.com>]

On 10/14/2011 03:21 PM, Rafał Miłecki wrote:
> I want to create module library, which will handle PHY operations on
> Broadcom card. For most of the time, I'm going to call library
> functions from b43.
> 
> However, there are places where I need to call some (b43) driver
> function from library module.
> 
> How can I handle that? Should I pass some functions pointers to the
> library? Is that going to work? Or is there a better approach?
> 
> P.S.
> I'm asking at linux-wireless, it's not wireless related however. I
> think question is quite simple for C hackers and there is no need to
> hit LKML.
> 

Hi Rafał,

It should be no different as normal drivers do. In your case I would say
b43 registers itself with phylib module and provides phylib_ops. It
could also provide the bcma_device for the 80211 core so the phylib can
use bcma directly. Whether or not phylib is still a library module when
doing so can be argued. As it does not provide a system function by
itself I tend to say it is.

I would suggest to look into mac80211 to see how it deals with the
callbacks it does into the device drivers.

Gr. AvS