From mboxrd@z Thu Jan  1 00:00:00 1970
From: Gregory Etelson <gregory@weka.io>
Subject: Re: i40e igb_uio: reset pci on process exit
Date: Mon, 29 May 2017 14:21:01 +0300
Message-ID: <1748341.rbpcFmWp0q@polaris>
References: <106841857.Z7q1jSDIte@polaris> <2463262.6ozr8bnjWv@polaris>
 <20170529110141.GB28265@localhost.localdomain>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7Bit
Cc: Stephen Hemminger <stephen@networkplumber.org>, dev@dpdk.org,
 Ferruh Yigit <ferruh.yigit@intel.com>, Qi Zhang <qi.z.zhang@intel.com>,
 Wenzhuo Lu <wenzhuo.lu@intel.com>
To: Shijith Thotton <shijith.thotton@caviumnetworks.com>
Return-path: <dev-bounces@dpdk.org>
Received: from mail-wm0-f52.google.com (mail-wm0-f52.google.com [74.125.82.52])
 by dpdk.org (Postfix) with ESMTP id CB05E7CD6
 for <dev@dpdk.org>; Mon, 29 May 2017 13:21:03 +0200 (CEST)
Received: by mail-wm0-f52.google.com with SMTP id b84so52019533wmh.0
 for <dev@dpdk.org>; Mon, 29 May 2017 04:21:03 -0700 (PDT)
In-Reply-To: <20170529110141.GB28265@localhost.localdomain>
List-Id: DPDK patches and discussions <dev.dpdk.org>
List-Unsubscribe: <http://dpdk.org/ml/options/dev>,
 <mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://dpdk.org/ml/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <http://dpdk.org/ml/listinfo/dev>,
 <mailto:dev-request@dpdk.org?subject=subscribe>
Errors-To: dev-bounces@dpdk.org
Sender: "dev" <dev-bounces@dpdk.org>

PMD already resets PCI during initialization.
In my patch, exiting process forced to release it's resources

On Monday, 29 May 2017 14:01:48 IDT Shijith Thotton wrote:
> On Mon, May 29, 2017 at 01:01:06PM +0300, Gregory Etelson wrote:
> >    I still have to support Red Hat 6.x. These system do not have VFIO
> > 
> >    IGB_UIO is the only option there.
> > 
> >    Also, there was a discussion that claimed IGB_UIO has better performance
> >    than VFIO.
> > 
> >    http://dpdk.org/ml/archives/dev/2014-August/004609.html
> > 
> >    Regards,
> >    Gregory
> > 
> 
> [..]
> >> static int
> >> igbuio_pci_open(struct uio_info *info, struct inode *inode)
> >> {
> >>	struct rte_uio_pci_dev *udev = info->priv;
> >>	struct pci_dev *dev = udev->pdev;
> >>
> >>	return pci_reset_function(dev);
> >> }
> >>
> >> and..
> >> udev->info.open = igbuio_pci_open;
> >>
> 
> I was suggesting to make reset part of open. It should work on your setup.
> 
> -	udev->info.release = igbuio_pci_release;
> +	udev->info.open = igbuio_pci_open;
> 
> Shijith
>