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On Fri, Oct 01, 2004 at 08:48:50AM +0200, Sander Storms wrote:
> Hello,
>=20
> I already posted this message some month ago, but I never got an answer.
> Either I am at the wrong
> mailing-list, or the message did not arrive properly.
> But anyway, here's my question:
>=20
> I want to create a driver for a custom-made PCI-device. This device has
> always been
> put directly into the kernel (NetBSD 1.5.1 back then), and it worked
> properly.
> Now, our software-supplier upgraded to NetBSD 1.6.1 and the driver has to=
 be
> rewritten.
> Since 1.6.1 has kernel module support, it is unlogical to hack the driver
> into the kernel again.

I think you need to hack it in. The ability for lkms to find devices on=20
say the PCI bus is much more recent than 1.6.x. Though if you manually=20
rescan, that's ok.

> Here's the problem:
>=20
> In the kernel-version of the software, 3 device-nodes where created:
> 1 for the PCI communication (/dev/pciDevice0)  and 2 modem interfaces
> (/dev/modem0 and /dev/modem1),=20
> present on the PCI device.
> If I create a kernel-module, only the 1st device-node (/dev/pciDevice0) w=
ill
> be created :
>=20
> -------------- SAMPLE CODE -------------------
>=20
> MOD_DEV("pciDevice", LM_DT_CHAR, -1, &pciDevice_cdevsw);
>=20
> int device_pci_lkmmatch(struct pci_attach_args *pa)
> {
>   if (device_pci_match(NULL, NULL, pa))
>   {
>     struct device *sc =3D (struct device *) device_lkmalloc();
>     if (sc !=3D NULL)
>     {
>       printf("%s at pci%u", sc->dv_xname, pa->pa_bus);
>       pciprint(pa, NULL);
>       device_pci_attach(NULL, sc, pa);
>     }
>   }
>=20
>   return 0;
> }
>=20
>=20
> static int device_lkmload(struct lkm_table *lkmt, int cmd)
> {
>   int error;
>   struct pci_attach_args paa;
>  =20
>   if (lkmexists(lkmt))
>   {
>     return (EEXIST);
>   }
>=20
>   (void)pci_find_device(&paa, device_pci_lkmmatch);
>  =20
>   if (device_counter =3D=3D 0)
>   {
>     return(ENXIO);
>   }
>=20
>   if ((error =3D modemIfattach ()))
>   {
>     return error;
>   }
>   return 0;
> }
>=20
> -------------- END SAMPLE CODE -------------------
>=20
> Can anyone tell me how I can create the 2 modem-interfaces, accessed thro=
ugh
> the function "modemIfattach ()" ?
> The 'modload' function returns the major device-number for my PCI-device,
> but NOT for my
> 2 modem-interfaces.

All the lkm helper modules, like the MOD_DEV() macro, are designed for=20
simple cases. Like one device.

If you want to use MOD_DEV, make two lkms, one that depends on the other.=
=20
You use the '-o' option to modload on the first load to generate a file,=20
then use that file as the "kernel" ('-A' option) for the second load.

The alternative is to make one LKM, of type MOD_MISC, and in your handling=
=20
routine duplicate the helper code from MOD_DEV. Just do it twice.

Take care,

Bill

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