[linux-dvb] Re: DVB-CI question

[Johannes Stezenbach <js@convergence.de>]

Andrew de Quincey wrote:
> 
> Its the complex list handling for fragment reassembly thats the bit I don't 
> see any reason for having cluttering up the kernel. Theres no high bandwidth 
> data being transferred, so theres no real gain in doing in the kernel. 
> However, in the av7110 instance, I can see that perhaps there were other 
> reasons it was done in the firmware, but those are not necessarily the case 
> here.
> 
> The extra locking in mine is because it is intended to be a generic API 
> implementation for CA devices, along the lines of the other parts of 
> dvb_core, so I cannot make any assumptions about any particular device. Note 
> that the implementation is pefectly happy with dealing with the av7110-style 
> defragmented packets as well, so it could be used to replace the current 
> av7110 opensource CA code with the generic API implementation.
> 
> I can write sample userspace code for doing the defragmentation if that would 
> help people (I've already released a partial version of it, so I can release 
> that fine).

Well, I would like to avoid changing the (semantics of the) CI API .

Anyway, if you make your code available we can then discuss if
your proposed changes are after all a good thing.

I'd like to hear Ralph's or Marcus's opinion, as they originally
wrote the CI code in the av7110 firmware and driver, and I think
they know a good deal more about that stuff than I do.


Johannes


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