Messages in this thread | | | From | Geert Uytterhoeven <> | Date | Fri, 19 Feb 2021 09:10:57 +0100 | Subject | Re: [RFC] IRQ handlers run with some high-priority interrupts(not NMI) enabled on some platform |
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Hi Michael,
On Thu, Feb 18, 2021 at 11:11 PM Michael Schmitz <schmitzmic@gmail.com> wrote: > On 19/02/21 12:19 am, Arnd Bergmann wrote: > > drivers/net/ethernet/8390/apne.c > > drivers/net/ethernet/8390/ax88796.c > > drivers/net/ethernet/8390/hydra.c > > drivers/net/ethernet/8390/mac8390.c > > drivers/net/ethernet/8390/ne.c > > drivers/net/ethernet/8390/zorro8390.c > [...] > > Most of these are normal short-lived interrupts that only transfer > > a few bytes or schedule deferred processing of some sort. > > Most of the scsi and network drivers process the data in > > a softirq, so those are generally fine here, but I do see that 8390 > > (ne2000) ethernet and the drivers/ide drivers do transfer their > > data in hardirq context. > > > > Arnd > > 8390 ethernet drivers are widely used on m68k platforms (Amiga and > Atari). At least on Amiga, the corresponding interrupt is a hardirq so > I'd advise caution. That said, the 8390 drivers might benefit from some > refactoring (the way these drivers are compiled does prevent e.g. the > APNE driver from being used with two different variants of PCMCIA > interfaces. I had begun some work on making IO primitives runtime > selected two years ago but that ended up looking too ugly ...). > > Can't recall what IPL the 8390 interrupts operate at - Geert?
#define IRQ_AMIGA_PORTS IRQ_AUTO_2
Zorro expansion boards can also use
#define IRQ_AMIGA_EXTER IRQ_AUTO_6
and some boards may have a jumper to select the latter, but all Amiga Linux drivers use IRQ_AMIGA_PORTS.
Gr{oetje,eeting}s,
Geert
-- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
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