The following commit has been merged into the x86/irq branch of tip: Commit-ID: dc0e64087213768a6232af980076a517aaaa4adb Gitweb: https://git.kernel.org/tip/dc0e64087213768a6232af980076a517aaaa4adb Author: Maciej W. Rozycki <macro@xxxxxxxxxxx> AuthorDate: Thu, 31 Mar 2022 08:10:17 +01:00 Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx> CommitterDate: Sun, 10 Apr 2022 12:48:14 +02:00 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@xxxxxxxxxxx> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Link: https://lore.kernel.org/r/alpine.DEB.2.21.2203301534440.22465@xxxxxxxxxxxxxxxxx --- arch/x86/pci/irq.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/pci/irq.c b/arch/x86/pci/irq.c index a33fe9c..b6b9853 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");
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