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| author |   Maciej W. Rozycki <macro@orcam.me.uk> | 2022-03-31 08:10:17 +0100 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2022-04-10 12:48:14 +0200 |
| commit | dc0e64087213768a6232af980076a517aaaa4adb (patch) | |
| tree | 9712bcafbe60e8d596095af52b76748c2a60c65c /arch/x86/pci | |
| parent | x86/PCI: Show the physical address of the $PIR table (diff) | |
| download | wireguard-linux-dc0e64087213768a6232af980076a517aaaa4adb.tar.xz wireguard-linux-dc0e64087213768a6232af980076a517aaaa4adb.zip | |
x86/PCI: Include function number in $PIR table dump
Contrary to the PCI BIOS specification[1] some systems include the PCI
function number for motherboard devices in their $PIR table, e.g. this
is what the Tyan Tomcat IV S1564D board reports:
00:14 slot=01
0:60/deb8
1:61/deb8
2:62/deb8
3:63/deb8
00:13 slot=02
0:61/deb8
1:62/deb8
2:63/deb8
3:60/deb8
00:12 slot=03
0:62/deb8
1:63/deb8
2:60/deb8
3:61/deb8
00:11 slot=04
0:63/deb8
1:60/deb8
2:61/deb8
3:62/deb8
00:07 slot=00
0:00/deb8
1:00/deb8
2:00/deb8
3:00/deb8
00:07 slot=00
0:00/deb8
1:00/deb8
2:00/deb8
3:63/deb8
Print the function number then in the debug $PIR table dump:
00:14.0 slot=01
0:60/deb8
1:61/deb8
2:62/deb8
3:63/deb8
00:13.0 slot=02
0:61/deb8
1:62/deb8
2:63/deb8
3:60/deb8
00:12.0 slot=03
0:62/deb8
1:63/deb8
2:60/deb8
3:61/deb8
00:11.0 slot=04
0:63/deb8
1:60/deb8
2:61/deb8
3:62/deb8
00:07.1 slot=00
0:00/deb8
1:00/deb8
2:00/deb8
3:00/deb8
00:07.2 slot=00
0:00/deb8
1:00/deb8
2:00/deb8
3:63/deb8
References:
[1] "PCI BIOS Specification", Revision 2.1, PCI Special Interest Group,
August 26, 1994, Table 4-1 "Layout of IRQ routing table entry.", p.
12
Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/alpine.DEB.2.21.2203301534440.22465@angie.orcam.me.uk
Diffstat (limited to 'arch/x86/pci')
| -rw-r--r-- | arch/x86/pci/irq.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/pci/irq.c b/arch/x86/pci/irq.c index a33fe9c811c7..b6b985338d4e 100644 --- a/arch/x86/pci/irq.c +++ b/arch/x86/pci/irq.c @@ -135,7 +135,8 @@ static void __init pirq_peer_trick(void) #ifdef DEBUG { int j; - DBG(KERN_DEBUG "%02x:%02x slot=%02x", e->bus, e->devfn/8, e->slot); + DBG(KERN_DEBUG "%02x:%02x.%x slot=%02x", + e->bus, e->devfn / 8, e->devfn % 8, e->slot); for (j = 0; j < 4; j++) DBG(" %d:%02x/%04x", j, e->irq[j].link, e->irq[j].bitmap); DBG("\n"); |