From: Thomas Monjalon <thomas.monjalon@6wind.com>
To: Allain Legacy <allain.legacy@windriver.com>
Cc: dev@dpdk.org, Ferruh Yigit <ferruh.yigit@intel.com>
Subject: Re: [dpdk-dev] [PATCH] igb_uio: support devices with at least 1 bar defined
Date: Wed, 15 Mar 2017 14:01:27 +0100 [thread overview]
Message-ID: <3246014.IauPTycO94@xps13> (raw)
In-Reply-To: <ec0bd08f-81b3-b27e-9dd5-f4e86900a2ad@intel.com>
2017-03-14 16:59, Ferruh Yigit:
> On 3/14/2017 4:33 PM, Allain Legacy wrote:
> > From: Matt Peters <matt.peters@windriver.com>
> >
> > Allow the BAR setup to succeed if a device has at least 1 BAR region
> > defined. Previously, the device probe would only succeed if at least one
> > memory BAR existed, but there are devices that have only port I/O BARs.
> >
> > For example, on Virtual Box a virtio device has only a single I/O BAR
> > because by default MSI-X is not enabled. While in qemu/kvm the virtio
> > device has MSI-X enabled and therefore has both an I/O and Memory BAR.
> >
> > The following are excerpts from "lspci -nnvvvv -s 00:09.0" on both types of
> > systems.
> >
> > Virtual Box:
> >
> > Region 0: I/O ports at d260 [size=32]
> > Capabilities: [80] #00 [0000]
> >
> > QEMU/KVM:
> >
> > Region 0: I/O ports at c060 [size=32]
> > Region 1: Memory at febd1000 (32-bit, non-prefetchable) [size=4K]
> > Expansion ROM at feb80000 [disabled] [size=256K]
> > Capabilities: [40] MSI-X: Enable+ Count=3 Masked-
> > Vector table: BAR=1 offset=00000000
> > PBA: BAR=1 offset=00000800
> >
> > Signed-off-by: Matt Peters <matt.peters@windriver.com>
> > Signed-off-by: Allain Legacy <allain.legacy@windriver.com>
>
> Acked-by: Ferruh Yigit <ferruh.yigit@intel.com>
Applied, thanks
prev parent reply other threads:[~2017-03-15 13:01 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-14 16:33 Allain Legacy
2017-03-14 16:59 ` Ferruh Yigit
2017-03-15 13:01 ` Thomas Monjalon [this message]
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