Messages in this thread | | | Date | Wed, 21 Jan 2009 10:05:03 -0500 | From | Mark Lord <> | Subject | Re: libata, devm_*, and MSI ? |
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Michael Ellerman wrote: > On Tue, 2009-01-20 at 20:02 -0800, Grant Grundler wrote: .. >> 1) post lspci -v output to verify device (and bridges) is programmed correctly. >> 2) look for chipset quirks that disable global msi > > The kernel shouldn't let you enable MSI if that's the case, ie. > pci_enable_msi() should fail. ..
Exactly. So it shouldn't be that, then.
> It might still be worth looking at the quirks though, in case there's > one for a previous revision of your bridge or something. > >> 3) Make sure MMIO ranges for 0xfee00000 are routed to local APIC >> ie each bridge needs to route that address somehow (negative decode >> is common for upstream). >> 4) manually trigger the MSI by doing a MMIO write to the correct >> 0xfee00000 address with the assigned vector in order to see if your >> interrupt handler gets called. > > And can you plug something directly into the PCIe bus? If so does MSI > work on that? ..
Yup. PCIe cards have no problem with MSI in that box.
More later..
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