>
> I wonder if linux kernel allows user to set PCI interrupts, different
> to those, preset by motherboard/PCI BIOS?
Yes, I think there is...sometimes....
A network driver includes the structure with pointer that is being
filled when the driver is loaded. This structure (
struct {
dev->open = card_open;
dev->close = card_close;
dev->set_config = card_set_config;
dev->hard_startx_xmit
...
}
includes the function set_config.
Alessandro Rubini in the book "Linux Device Drivers" has written the
following about set_config:
int (*set_config)(struct device *dev, struct ifmap *map)
Change the interface configuration. This method is the entry point for
configuring the driver. The I/O adress and its interupt number can be
changed at runtime using /set-config/. This capability can be used by
the system administrator is the interface cannot be probed for. This
method is described later in "run Time Configuration"
> For example, is it possible to set to different interrupts five ethernet
> cards if BIOS does not allow to choose which PCI card should use which
> interrupt?
The reason I wrote sometimes is that a grep in the network drirectories
does not find to many drivers that implement this function.
et_config = NULL; /* not supported for now &&& */
plip.c: dev->set_config = plip_config;
sb_ipv4.c: dev->set_config = hssb_config; /* Change if configuration */
sdla.c:int sdla_set_config(struct device *dev, struct ifmap *map)
sdla.c: dev->set_config = sdla_set_config;
strip.c: /* dev->set_config unused */
eturns :
If not implementing this function implies default behavior, then I hope
for you that this default behavior allows changing the interupt, rather
then plain "not implemented".
Hennes Passmann "The woods are lovely, dark and deep.
Hennes@stack./dev/nulll But I have promises to keep,
hennes@passmann./dev/nullu and lines to code before I sleep,
( replace /dev/null with n ) and lines to code before I sleep."
> Sincerely yours,
>
> Ilia Zubkov,
> Educational Network technical director
>
>
> P.S. Any pointers on some good docs desribing existing PCI/IRQ solutions
> are appreciated.
>
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