Re: [dpdk-dev] [PATCH] igb_uio: support devices with at least 1 bar defined

[Thomas Monjalon <thomas.monjalon@6wind.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