From patchwork Tue Feb 28 18:53:15 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aaron Conole X-Patchwork-Id: 20966 X-Patchwork-Delegate: thomas@monjalon.net Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [IPv6:::1]) by dpdk.org (Postfix) with ESMTP id 967BFFA4E; Tue, 28 Feb 2017 19:55:09 +0100 (CET) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by dpdk.org (Postfix) with ESMTP id 324EF2B86 for ; Tue, 28 Feb 2017 19:53:33 +0100 (CET) Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 9F1EA85363; Tue, 28 Feb 2017 18:53:33 +0000 (UTC) Received: from dhcp-25-97.bos.redhat.com ([10.18.25.172]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id v1SIrHWc019326; Tue, 28 Feb 2017 13:53:33 -0500 From: Aaron Conole To: dev@dpdk.org Cc: Stephen Hemminger , Bruce Richardson Date: Tue, 28 Feb 2017 13:53:15 -0500 Message-Id: <20170228185315.12546-27-aconole@redhat.com> In-Reply-To: <20170228185315.12546-1-aconole@redhat.com> References: <20170227161811.12309-1-aconole@redhat.com> <20170228185315.12546-1-aconole@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.24 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Tue, 28 Feb 2017 18:53:33 +0000 (UTC) Subject: [dpdk-dev] [PATCH v6 26/26] rte_eal_init: add info about various error codes X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" The rte_eal_init function will now pass failure reason hints to the application. To help app developers deciper this, add some brief information about what the codes are indicating. Signed-off-by: Aaron Conole Acked-by: Bruce Richardson --- lib/librte_eal/common/include/rte_eal.h | 27 ++++++++++++++++++++++++++- 1 file changed, 26 insertions(+), 1 deletion(-) diff --git a/lib/librte_eal/common/include/rte_eal.h b/lib/librte_eal/common/include/rte_eal.h index 03fee50..9251244 100644 --- a/lib/librte_eal/common/include/rte_eal.h +++ b/lib/librte_eal/common/include/rte_eal.h @@ -159,7 +159,32 @@ int rte_eal_iopl_init(void); * function call and should not be further interpreted by the * application. The EAL does not take any ownership of the memory used * for either the argv array, or its members. - * - On failure, a negative error value. + * - On failure, -1 and rte_errno is set to a value indicating the cause + * for failure. In some instances, the application will need to be + * restarted as part of clearing the issue. + * + * Error codes returned via rte_errno: + * EACCES indicates a permissions issue. + * + * EAGAIN indicates either a bus or system resource was not available, + * setup may be attempted again. + * + * EALREADY indicates that the rte_eal_init function has already been + * called, and cannot be called again. + * + * EFAULT indicates the tailq configuration name was not found in + * memory configuration. + * + * EINVAL indicates invalid parameters were passed as argv/argc. + * + * ENOMEM indicates failure likely caused by an out-of-memory condition. + * + * ENODEV indicates memory setup issues. + * + * ENOTSUP indicates that the EAL cannot initialize on this system. + * + * EUNATCH indicates that the PCI bus is either not present, or is not + * readable by the eal. */ int rte_eal_init(int argc, char **argv);