From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ferruh Yigit Subject: Re: [PATCH] igb_uio: support devices with at least 1 bar defined Date: Tue, 14 Mar 2017 16:59:07 +0000 Message-ID: References: <1489509189-166941-1-git-send-email-allain.legacy@windriver.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Cc: dev@dpdk.org To: Allain Legacy Return-path: Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by dpdk.org (Postfix) with ESMTP id E70C15598 for ; Tue, 14 Mar 2017 17:59:09 +0100 (CET) In-Reply-To: <1489509189-166941-1-git-send-email-allain.legacy@windriver.com> List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" On 3/14/2017 4:33 PM, Allain Legacy wrote: > From: Matt Peters > > 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 > Signed-off-by: Allain Legacy Acked-by: Ferruh Yigit