linux-kernel - Re: PCI riser cards and PCI irq routing, etc

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Message-ID: <45DC8B3A.2080301@xs4all.nl>
Date:	Wed, 21 Feb 2007 19:11:06 +0100
From:	Udo van den Heuvel <udovdh@...all.nl>
To:	linux-kernel@...r.kernel.org
CC:	Krzysztof Halasa <khc@...waw.pl>,
	Alistair John Strachan <s0348365@....ed.ac.uk>,
	Lennart Sorensen <lsorense@...lub.uwaterloo.ca>
Subject: Re: PCI riser cards and PCI irq routing, etc

BTW:

Is the situation, with default DN setting of 19 as displayed below,
`normal` w.r.t. interrupts?
I mean: Both the DVB card with DN19 and the Unichrome Pro video adapter
have the same irq although they are on different busses.

(...)
00:13.0 Multimedia controller: Philips Semiconductors SAA7146 (rev 01)
        Subsystem: TERRATEC Electronic GmbH Unknown device 1157
        Flags: bus master, medium devsel, latency 32, IRQ 16
        Memory at fdffc000 (32-bit, non-prefetchable) [size=512]

00:14.0 Multimedia controller: Philips Semiconductors SAA7146 (rev 01)
        Subsystem: TERRATEC Electronic GmbH Unknown device 1155
        Flags: bus master, medium devsel, latency 32, IRQ 20
        Memory at fdffb000 (32-bit, non-prefetchable) [size=512]

01:00.0 VGA compatible controller: VIA Technologies, Inc. UniChrome Pro
IGP (rev
 01) (prog-if 00 [VGA])
        Subsystem: VIA Technologies, Inc. UniChrome Pro IGP
        Flags: bus master, 66MHz, medium devsel, latency 32, IRQ 16
        Memory at f4000000 (32-bit, prefetchable) [size=64M]
        Memory at fb000000 (32-bit, non-prefetchable) [size=16M]
        [virtual] Expansion ROM at fc000000 [disabled] [size=64K]
        Capabilities: [60] Power Management version 2
        Capabilities: [70] AGP version 3.0

How can I find out what INT_A/B/C/D line is mapped to what irq?
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