From: Neil Horman <nhorman@tuxdriver.com>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH 00/10] igb_uio patches
Date: Wed, 11 Jun 2014 06:30:05 -0400 [thread overview]
Message-ID: <20140611103005.GA19777@hmsreliant.think-freely.org> (raw)
In-Reply-To: <20140610134709.03524b62@nehalam.linuxnetplumber.net>
On Tue, Jun 10, 2014 at 01:47:09PM -0700, Stephen Hemminger wrote:
> On Tue, 10 Jun 2014 19:26:08 +0000
> "Carew, Alan" <alan.carew@intel.com> wrote:
>
> > One alternative for us is then to take Neil Horman's idea of scanning /sys/bus/pci/devices/<D:B:D.F>/msi_irqs/
> > This gives us at least (MSI | MSI-X) | INT-X, however the Virtio specification mentions MSI-X explicitly for determining the correct offset and might not address the underlying problem my patch set was addressing, I have not tried Virtio with MSI.
>
> MSI doesn't work with virtio. pci_enable_msi() returns error. The device
> does not report MSI capability.
>
/sys/bus/pci/devices/<device>/irq
also indicates which legacy irq is assigned to a given device
Neil
next prev parent reply other threads:[~2014-06-11 10:30 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20140606212644.203613327@networkplumber.org>
2014-06-10 15:55 ` Carew, Alan
2014-06-10 15:59 ` Burakov, Anatoly
[not found] ` <0E29434AEE0C3A4180987AB476A6F630593A5E2D@IRSMSX101.ger.corp.intel.com>
[not found] ` <20140610104035.08d3946a@nehalam.linuxnetplumber.net>
2014-06-10 19:26 ` Carew, Alan
2014-06-10 20:47 ` Stephen Hemminger
2014-06-11 10:30 ` Neil Horman [this message]
2014-06-10 20:49 ` Stephen Hemminger
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