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RE: Is it possible to do polling for the Ethernet driverusing a stack ?
- From: Gary Thomas <gthomas at ecoscentric dot com>
- To: "Cusson, Pascal" <pascal dot cusson at analog dot com>
- Cc: eCos Discussion <ecos-discuss at sources dot redhat dot com>
- Date: 31 Oct 2002 09:03:47 -0700
- Subject: RE: [ECOS] Is it possible to do polling for the Ethernet driverusing a stack ?
- References: <8FDC0F9BE1F91D44BE964AA54AAA67B6D39182@wilmexm3.ad.analog.com>
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
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--
------------------------------------------------------------
Gary Thomas |
eCosCentric, Ltd. |
+1 (970) 229-1963 | eCos & RedBoot experts
gthomas@ecoscentric.com |
http://www.ecoscentric.com/ |
------------------------------------------------------------
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