Terry Lambert wrote:
>
> > Back in July I was asking about the capability to set parameters (variables)
> > when loading my DSL driver module. There was a small flurry of activity
> > about some initial ideas on how to do it, but I never heard any more about
> > it. Did you (Mike, Warner, or anybody) have time to work on it? Did this
> > capability get put into release 4.1, by any chance? :)
>
> A common trick "in the old days" was to load a parameter module
> that the driver module depended up, and give it a hook that it
> could call to get data from the parameter module, by reference
> to a statis structure.
>
> You would send the data down to the parameter module before you
> load the driver module; thus:
>
> 1) Load paramter module
> 2) Open parameter module psuedo device
> 3) Ioctl parameters up/down via the pseudo device
> 4) Load the deriver module
> 5) Driver module attach routine call parameter_fetch()
> routine out of parameter module
> 6) Parameter module returns static parameter structure,
> by reference
> 7) Driver dereferences parameters out of static struct
> 8) Driver completes attach
I'm implementing this suggested method, but I have one problem. I don't
know what "device" to access to allow me to do ioctl's to it.
That is, I've created a parameter module (which loads and is accessible
by my driver) - but I don't think that (alone) has created a "device",
has it? If so, what is it named? Realize that at step 3, my real
device doesn't exist yet, so I can't reference that...
Do I need to somehow "create" a (pseudo-)device in my parameter module
- and if so how do I do that?
Thanks,
Gary
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