Date: Mon, 13 Feb 2012 11:56:25 -0500 From: John Baldwin <jhb@freebsd.org> To: freebsd-drivers@freebsd.org Cc: Bret Ketchum <bcketchum@gmail.com> Subject: Re: MSI-X support Message-ID: <201202131156.25554.jhb@freebsd.org> In-Reply-To: <CAGm6yaSeu6CpbRLj_qDiwMqYmipHxP69AsxAWxcTgsJfMkiFEw@mail.gmail.com> References: <CAGm6yaSeu6CpbRLj_qDiwMqYmipHxP69AsxAWxcTgsJfMkiFEw@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
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
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201202131156.25554.jhb>