From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Monjalon <thomas.monjalon@6wind.com>
Subject: Re: [PATCH] net/vhost: Add function to retreive the
	'vid' for a given port id.
Date: Tue, 13 Sep 2016 17:10:09 +0200
Message-ID: <28342659.xFrdpVFeBf@xps13>
References: <1473774463-26966-1-git-send-email-ciara.loftus@intel.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7Bit
Cc: dev@dpdk.org
To: Ciara Loftus <ciara.loftus@intel.com>
Return-path: <dev-bounces@dpdk.org>
Received: from mail-wm0-f43.google.com (mail-wm0-f43.google.com [74.125.82.43])
 by dpdk.org (Postfix) with ESMTP id 6C993E6D
 for <dev@dpdk.org>; Tue, 13 Sep 2016 17:10:12 +0200 (CEST)
Received: by mail-wm0-f43.google.com with SMTP id c131so117672050wmh.0
 for <dev@dpdk.org>; Tue, 13 Sep 2016 08:10:12 -0700 (PDT)
In-Reply-To: <1473774463-26966-1-git-send-email-ciara.loftus@intel.com>
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>

2016-09-13 14:47, Ciara Loftus:
> In some cases when using the vHost PMD, certain vHost library functions
> may still need to be accessed. One such example is the
> rte_vhost_get_queue_num function which returns the number of virtqueues
> reported by the guest - information which is not exposed by the PMD.
> 
> This commit introduces a new rte_eth_vhost function that returns the
> 'vid' associated with a given port id. This allows the PMD user to call
> vHost library functions which require the 'vid' value.

I think we should not add any API to the PMDs.
Maybe you are looking for a generic API in ethdev.