Messages in this thread | | | Date | Mon, 12 May 2003 13:26:54 -0400 | From | Chuck Ebbert <> | Subject | Message Signalled Interrupt support? |
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Jeff Garzik wrote:
> Has anybody done any work, or put any thought, into MSI support? > > Would things massively break if I set up MSI manually in the driver? > > I heard rumblings on lkml that Intel has done some work internally w/ > MSI support in Linux, but that doesn't help me much without further > details ;-)
I found this in my archives:
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Subject: RE: [PATCH] 2.5.68 Fix IO_APIC IRQ assignment bug Date: Mon, 21 Apr 2003 09:34:34 -0700 From: "Nakajima, Jun" <jun.nakajima@intel.com>
<SNIP>
After (vector-based) CPU0 CPU1 0: 709682 0 IO-APIC-edge timer 2: 0 0 XT-PIC cascade 9: 0 0 IO-APIC-level acpi 14: 4988 1 IO-APIC-edge ide0 15: 10 1 IO-APIC-edge ide1 177: 78 0 IO-APIC-level uhci-hcd 185: 0 0 IO-APIC-level uhci-hcd, uhci-hcd 193: 58 0 IO-APIC-level uhci-hcd 201: 0 0 IO-APIC-level ehci-hcd 209: 356 0 IO-APIC-level eth0 NMI: 0 0 LOC: 707613 707524 ERR: 0 MIS: 0
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They changed things so the MSI scheme uses the vector number directly instead of remapping it...
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