From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Hemminger <shemming@brocade.com>
Subject: BUG: DPDK i40e does not work with VFIO
Date: Thu, 5 Nov 2015 09:19:25 -0800
Message-ID: <20151105091925.0bbb0816@xeon-e3>
Mime-Version: 1.0
Content-Type: text/plain; charset="US-ASCII"
Content-Transfer-Encoding: 7bit
To: Helin Zhang <helin.zhang@intel.com>, <dev@dpdk.org>, Jesse Brandeburg
 <jesse.brandeburg@gmail.com>, "Ronciak, John" <john.ronciak@intel.com>
Return-path: <dev-bounces@dpdk.org>
Received: from mx0a-000f0801.pphosted.com (mx0a-000f0801.pphosted.com
 [67.231.144.122]) by dpdk.org (Postfix) with ESMTP id 19784591F
 for <dev@dpdk.org>; Thu,  5 Nov 2015 18:19:17 +0100 (CET)
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>
Errors-To: dev-bounces@dpdk.org
Sender: "dev" <dev-bounces@dpdk.org>

On my machine, i40e will not startup if using VFIO.

PMD: rte_i40evf_pmd_init():  >>
PMD: rte_i40e_pmd_init():  >>
PMD: eth_i40e_dev_init():  >>
PMD: i40e_set_symmetric_hash_enable_per_port(): Symmetric hash has already been disabled
PMD: eth_i40e_dev_init(): Failed to init adminq: -54

The normal Linux driver works correctly. Firmware has been updated to the latest version.

Like my earlier experience with fm10k, I suspect that Intel never tests i40e with IOMMU,
and only tested with igb_uio.