From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <stephen@networkplumber.org>
Received: from mail-pd0-f180.google.com (mail-pd0-f180.google.com
 [209.85.192.180]) by dpdk.org (Postfix) with ESMTP id C3CD65A40
 for <dev@dpdk.org>; Wed, 15 Apr 2015 03:06:15 +0200 (CEST)
Received: by pdbqd1 with SMTP id qd1so31931397pdb.2
 for <dev@dpdk.org>; Tue, 14 Apr 2015 18:06:15 -0700 (PDT)
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
 d=1e100.net; s=20130820;
 h=x-gm-message-state:date:from:to:cc:subject:message-id:mime-version
 :content-type:content-transfer-encoding;
 bh=kJh22D/sG9A6zdDXJ1mEzNaKKvjczKXJmabdo/4oDAk=;
 b=f2KdmWZb05z10Tz8InMmc21+J/brvm54uykMm6eSkQVES1wpI27kK5nMhadE2q+XCX
 9dwCwQ2fwJ5YDDVZrZYCn9Oz+UrddjnGxMrCo4ScMgNzh5rh0Y8Rr07CXukiFAo5brSR
 +pY6JTwKmzYTtwNJmzGGOPtPyx5iiTo8Fc63pGR4z6EtTlTkz2A13GMYtp8jYvu3CCt0
 yLfZM7tB2Lfw9jNCjZa8zvZXCqoOfyoRrJI68f3YdeLGhl6qiPUrRmWRew0KolqZNvit
 fUxi5/0VRuDM/NsNwfho0DlRyvMCDTPfAbz3RDCmrbSMGmDMZiGrla5zCD2Bp5HiboN7
 h0LA==
X-Gm-Message-State: ALoCoQnksn9pUh+ZCpxsML2GX762Tu0pPmtCJzhOljTquhymwNCOwdy/ut7cPBTdjvBpUY3zKycY
X-Received: by 10.66.66.166 with SMTP id g6mr41862177pat.88.1429059974952;
 Tue, 14 Apr 2015 18:06:14 -0700 (PDT)
Received: from urahara (static-50-53-82-155.bvtn.or.frontiernet.net.
 [50.53.82.155])
 by mx.google.com with ESMTPSA id xt9sm2293528pbc.14.2015.04.14.18.06.14
 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);
 Tue, 14 Apr 2015 18:06:14 -0700 (PDT)
Date: Tue, 14 Apr 2015 18:06:20 -0700
From: Stephen Hemminger <stephen@networkplumber.org>
To: Danny Zhou <danny.zhou@intel.com>, Bruce Richardson
 <bruce.richardson@intel.com>, Declan Doherty <declan.doherty@intel.com>
Message-ID: <20150414180620.03deb8ee@urahara>
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Cc: dev@dpdk.org
Subject: [dpdk-dev] UIO pci-generic support broke igb_uio
X-BeenThere: dev@dpdk.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: patches and discussions about DPDK <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>
X-List-Received-Date: Wed, 15 Apr 2015 01:06:16 -0000

The addition of uio pci-generic broke use if igb_uio because
the wrong file descriptor is being used.

If I was a hard ass I would recommend uio pci-generic support
be reverted from 2.0 until/unless this fixed.

Failure mode is on startup:

EAL:  Error reading interrupts status for fd 0
PANIC in start_port()
rte_eth-dev_start: port=0 err=-5

The problem commit is:
commit 4a499c64959074ba6fa6a5a2b3a2a6aa10627fa1
Author: Danny Zhou <danny.zhou@intel.com>
Date:   Fri Feb 20 16:59:15 2015 +0000

    eal/linux: enable uio_pci_generic support
    
    Change the EAL PCI code so that it can work with both the
    uio_pci_generic in-tree driver, as well as the igb_uio
    DPDK-specific driver.
    
    This involves changes to
    1) Modify method of retrieving BAR resource mapping information
    2) Mapping using resource files in /sys rather than /dev/uio*
    2) Setup bus master bit in NIC's PCIe configuration space for
    uio_pci_generic.
    
    Signed-off-by: Danny Zhou <danny.zhou@intel.com>
    Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
    Acked-by: Declan Doherty <declan.doherty@intel.com>