Date: Tue, 12 Apr 2011 08:59:31 -0500 From: Brandon Gooch <jamesbrandongooch@gmail.com> To: Bret Ketchum <bcketchum@gmail.com> Cc: freebsd-drivers@freebsd.org Subject: Re: MSI interrupts. Message-ID: <BANLkTikGNSyNjfgoTAD%2BjL7eXzbNFktrcg@mail.gmail.com> In-Reply-To: <BANLkTim9WWQDjAJsHNNDRTN%2BnTXbxAonFA@mail.gmail.com>
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On Tue, Apr 12, 2011 at 8:16 AM, Bret Ketchum <bcketchum@gmail.com> wrote: > I've a roll-your-own driver for FreeBSD 8.x that uses MSI interrupts for > PCI-E HBAs where one or more will be installed in a off-the-shelf amd64 > pizza box. The driver is using bus_setup_intr() and depending upon the slots > the HBAs are install I see log messages from apic_alloc_vectors(), for > example: > > Apr 12 06:44:15 mfsbsd kernel: xxxpci10: attempting to allocate 1 MSI > vectors (16 supported) > Apr 12 06:44:15 mfsbsd kernel: APIC: Couldn't find APIC vectors for 1 IRQs > Apr 12 06:44:15 mfsbsd kernel: ioapic1: routing intpin 13 (PCI IRQ 37) to > lapic 0 vector 59 > > Using vmstat -ia: > > interrupt total rate > irq37: xxxpci10 74 0 > > The problem appears to be that HBA interrupts are not being delivered to > the driver. If I swap cards around in slots I can eliminate the message and: > > Apr 12 06:44:15 mfsbsd kernel: msi: routing MSI IRQ 266 to local APIC 0 > vector 80 > > And interrupts appear to be delivered properly. Before I dive in, can > anyone explain this behavior? > > Thanks in advance. > > Dr. Can you provide output from a verbose boot of the system (perhaps one for each variation of card installation in the slots)? That may shed some light for the developers... -Brandonhelp
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