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From: John Baldwin <jhb@freebsd.org>
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Date: Mon, 13 Feb 2012 11:56:25 -0500
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	(bigwig.baldwin.cx); Mon, 13 Feb 2012 12:15:43 -0500 (EST)
Cc: Bret Ketchum <bcketchum@gmail.com>
Subject: Re: MSI-X support
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On Friday, February 10, 2012 8:17:49 am Bret Ketchum wrote:
>     I've an HBA which supports MSI-X but uses the same BAR for its memory
> mapped registers, the MSI-X table and PBA. They're just at different
> offsets, similar to a QLogic 8Gb ISP2532. I've perused the source and it
> looks like 8.1 doesn't support this flavor of MSI-X configuration out of
> the box. Posting here to see if I'm just blind.

8.1 should support this just fine.  All MSI-X requires is that the driver have 
allocated and activated the relevant BAR before calling pci_alloc_msix().  
This makes the PCI bus code simpler for exactly the case you mention since the 
bus doesn't have to deal with trying to allocate the same BAR twice, etc.

-- 
John Baldwin