From patchwork Wed Mar 10 16:09:43 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kishon Vijay Abraham I X-Patchwork-Id: 1450591 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=ti.com header.i=@ti.com header.a=rsa-sha256 header.s=ti-com-17Q1 header.b=KDAlkGOA; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4DwcXh5c0cz9sWC for ; Thu, 11 Mar 2021 03:12:04 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233428AbhCJQLe (ORCPT ); Wed, 10 Mar 2021 11:11:34 -0500 Received: from fllv0016.ext.ti.com ([198.47.19.142]:56020 "EHLO fllv0016.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233404AbhCJQLO (ORCPT ); Wed, 10 Mar 2021 11:11:14 -0500 Received: from fllv0034.itg.ti.com ([10.64.40.246]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 12AGAlIo078920; Wed, 10 Mar 2021 10:10:47 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1615392647; bh=PswJzuVJEpo2V7rLJvAKEapfrXwbPZ/ywMR3JM+8zp4=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=KDAlkGOAstSuJcAiMHjA66obcuo850UcsdlmDC3LGNPBYvYtza05Z6fkjfeYZ1B0Q hDW/aNCdzzXYqoF43HqBYbDIAbbCNph+/9cBVbzcfWDQTYxzU2vN1oSSVAzCZURuvc aYKZHlaoW25j5WdOS3zrliC85FmCXQcEEN2Ibr4k= Received: from DFLE101.ent.ti.com (dfle101.ent.ti.com [10.64.6.22]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 12AGAlux063711 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 10 Mar 2021 10:10:47 -0600 Received: from DFLE101.ent.ti.com (10.64.6.22) by DFLE101.ent.ti.com (10.64.6.22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Wed, 10 Mar 2021 10:10:47 -0600 Received: from lelv0327.itg.ti.com (10.180.67.183) by DFLE101.ent.ti.com (10.64.6.22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2 via Frontend Transport; Wed, 10 Mar 2021 10:10:47 -0600 Received: from a0393678-ssd.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id 12AG9ql0100440; Wed, 10 Mar 2021 10:10:40 -0600 From: Kishon Vijay Abraham I To: Kishon Vijay Abraham I , Lorenzo Pieralisi , Bjorn Helgaas , Jonathan Corbet , Rob Herring , Arnd Bergmann , Tom Joseph , Jingoo Han , Gustavo Pimentel , Marek Vasut , Yoshihiro Shimoda , Shawn Lin , Heiko Stuebner , Nadeem Athani CC: Greg Kroah-Hartman , , , , , , , , Lokesh Vutla Subject: [PATCH v4 7/7] Documentation: PCI: endpoint/pci-endpoint-cfs: Guide to use SR-IOV Date: Wed, 10 Mar 2021 21:39:43 +0530 Message-ID: <20210310160943.7606-8-kishon@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210310160943.7606-1-kishon@ti.com> References: <20210310160943.7606-1-kishon@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Add Documentation to help users use PCI endpoint to create virtual functions using configfs. An endpoint function is designated as a virtual endpoint function device when it is linked to a physical endpoint function device (instead of a endpoint controller). Signed-off-by: Kishon Vijay Abraham I --- Documentation/PCI/endpoint/pci-endpoint-cfs.rst | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/Documentation/PCI/endpoint/pci-endpoint-cfs.rst b/Documentation/PCI/endpoint/pci-endpoint-cfs.rst index 696f8eeb4738..56fb33c5e8fd 100644 --- a/Documentation/PCI/endpoint/pci-endpoint-cfs.rst +++ b/Documentation/PCI/endpoint/pci-endpoint-cfs.rst @@ -43,6 +43,7 @@ entries corresponding to EPF driver will be created by the EPF core. .. / ... / ... / + ... / .. / ... / ... / @@ -68,6 +69,7 @@ created) ... subsys_vendor_id ... subsys_id ... interrupt_pin + ... / ... primary/ ... / ... secondary/ @@ -79,6 +81,13 @@ interface should be added in 'primary' directory and symlink of endpoint controller connected to secondary interface should be added in 'secondary' directory. +The directory can have a list of symbolic links +() to other . These symbolic links should +be created by the user to represent the virtual functions that are bound to +the physical function. In the above directory structure is a +physical function and is a virtual function. An EPF device once +it's linked to another EPF device, cannot be linked to a EPC device. + EPC Device ========== @@ -98,7 +107,8 @@ entries corresponding to EPC device will be created by the EPC core. The directory will have a list of symbolic links to . These symbolic links should be created by the user to -represent the functions present in the endpoint device. +represent the functions present in the endpoint device. Only +that represents a physical function can be linked to a EPC device. The directory will also have a *start* field. Once "1" is written to this field, the endpoint device will be ready to