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RE: Is it possible to do polling for the Ethernet driverusing a stack ?


On Thu, 2002-10-31 at 08:56, Cusson, Pascal wrote:
> Basically,
>    I expect the stack to process the packets for all standard socket
> operations.
> 
>    By reading through some examples, after polling for the FCCE flags, I
> need to calculate the length of the packet and then call the receive
> function part of my driver hook. However I require a struct eth_drv_sc
> argument. This argument is passed from the interrupt. Is there another
> way to get that handle ?
> 

Well, without interrupts and threads running, the stack won't be able
to do anything for you (that's just how it's designed).

> Hope I'm giving you a tiny challenge here !
> 
> Pascal
> 
> -----Original Message-----
> From: Gary Thomas [mailto:gthomas@ecoscentric.com]
> Sent: Thursday, October 31, 2002 10:48 AM
> To: Cusson, Pascal
> Cc: eCos Discussion
> Subject: RE: [ECOS] Is it possible to do polling for the Ethernet driver
> using a stack ?
> 
> 
> On Thu, 2002-10-31 at 08:32, Cusson, Pascal wrote:
> > Yes there is,
> >    I need maximize performance on a system will support multiple ATM
> and
> > ETH. My system need to be synchronous meaning one after another in
> > specific order. By using polling I can easily control all aspects.
> > Further more, polling will take less time than using interrupts which
> > should help for performances. The 8260 I am using is not the fastest
> > therefore I need everything I can get out of it.
> > 
> >    What I would like do is poll the FCCE to see if there is a buffer
> > ready and then signal the stack so that the buffer descriptor can be
> > processed and freed. 
> > 
> > The part I am missing here is how to I tell the stack to process my
> > buffer descriptor ?
> > 
> 
> One you have a packet (or activity), what sort of things are you then 
> expecting the "stack" to do for you?
> 
> > Pascal
> > 
> > -----Original Message-----
> > From: Gary Thomas [mailto:gthomas@ecoscentric.com]
> > Sent: Thursday, October 31, 2002 10:25 AM
> > To: Cusson, Pascal
> > Cc: eCos Discussion
> > Subject: Re: [ECOS] Is it possible to do polling for the Ethernet
> driver
> > using a stack ?
> > 
> > 
> > On Thu, 2002-10-31 at 08:04, Cusson, Pascal wrote:
> > > Hello Everyone,
> > >    Has anyone ever made a Ethernet driver using polling ? If so how
> > did you link the driver to the stack ? What function calls did you
> make
> > ?
> > 
> > The stacks that are used with eCos (not RedBoot, it has it's
> > own stack) really should be interrupt driven.  Is there some
> > reason that you want to poll?
> > 
> > -- 
> > ------------------------------------------------------------
> > Gary Thomas                  |
> > eCosCentric, Ltd.            |  
> > +1 (970) 229-1963            |  eCos & RedBoot experts
> > gthomas@ecoscentric.com      |
> > http://www.ecoscentric.com/  |
> > ------------------------------------------------------------
> > 
> > -- 
> > Before posting, please read the FAQ:
> http://sources.redhat.com/fom/ecos
> > and search the list archive: http://sources.redhat.com/ml/ecos-discuss
> -- 
> ------------------------------------------------------------
> Gary Thomas                  |
> eCosCentric, Ltd.            |  
> +1 (970) 229-1963            |  eCos & RedBoot experts
> gthomas@ecoscentric.com      |
> http://www.ecoscentric.com/  |
> ------------------------------------------------------------
> 
> 
> -- 
> Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
> and search the list archive: http://sources.redhat.com/ml/ecos-discuss
> 
> -- 
> Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
> and search the list archive: http://sources.redhat.com/ml/ecos-discuss
-- 
------------------------------------------------------------
Gary Thomas                  |
eCosCentric, Ltd.            |  
+1 (970) 229-1963            |  eCos & RedBoot experts
gthomas@ecoscentric.com      |
http://www.ecoscentric.com/  |
------------------------------------------------------------


-- 
Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
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