From patchwork Fri Mar 5 05:04:06 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: 12117649 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2BE6FC4360C for ; Fri, 5 Mar 2021 05:05:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F2D5C65015 for ; Fri, 5 Mar 2021 05:05:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229629AbhCEFFI (ORCPT ); Fri, 5 Mar 2021 00:05:08 -0500 Received: from fllv0016.ext.ti.com ([198.47.19.142]:48950 "EHLO fllv0016.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229631AbhCEFFH (ORCPT ); Fri, 5 Mar 2021 00:05:07 -0500 Received: from lelv0265.itg.ti.com ([10.180.67.224]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 12554kTU074947; Thu, 4 Mar 2021 23:04:46 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1614920686; bh=xZP94/W6e+feo2IXbD5QHf0IlP942uGU++0kfiWPUQA=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=Aw77jxUakLN17FvgAG/jkmtIzJsR6ywXTsNadGsqlTyMGsF7wy6feVFZMY6P5aYIf Mhz7hu+w/KW8q0o/TSvQo3tdJycMycxCvu1Bsd4BmIlZ/f4Hm/kSaMFSt8VvK30ygt ETrambS5DvvmkMaf/amZexXLE3RQC7Y/dyOKa4Nc= Received: from DFLE102.ent.ti.com (dfle102.ent.ti.com [10.64.6.23]) by lelv0265.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 12554k6Y128105 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 4 Mar 2021 23:04:46 -0600 Received: from DFLE105.ent.ti.com (10.64.6.26) by DFLE102.ent.ti.com (10.64.6.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Thu, 4 Mar 2021 23:04:45 -0600 Received: from lelv0326.itg.ti.com (10.180.67.84) by DFLE105.ent.ti.com (10.64.6.26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3 via Frontend Transport; Thu, 4 Mar 2021 23:04:45 -0600 Received: from a0393678-ssd.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id 12554D98116197; Thu, 4 Mar 2021 23:04:38 -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 v3 3/7] PCI: endpoint: Add support to link a physical function to a virtual function Date: Fri, 5 Mar 2021 10:34:06 +0530 Message-ID: <20210305050410.9201-4-kishon@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210305050410.9201-1-kishon@ti.com> References: <20210305050410.9201-1-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 While the physical function has to be linked to endpoint controller, the virtual function has to be linked to a physical function. Add support to link a physical function to a virtual function in pci-ep-cfs. Signed-off-by: Kishon Vijay Abraham I --- drivers/pci/endpoint/pci-ep-cfs.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/pci/endpoint/pci-ep-cfs.c b/drivers/pci/endpoint/pci-ep-cfs.c index f3a8b833b479..999911801877 100644 --- a/drivers/pci/endpoint/pci-ep-cfs.c +++ b/drivers/pci/endpoint/pci-ep-cfs.c @@ -475,6 +475,28 @@ static struct configfs_attribute *pci_epf_attrs[] = { NULL, }; +static int pci_epf_vepf_link(struct config_item *epf_pf_item, + struct config_item *epf_vf_item) +{ + struct pci_epf_group *epf_vf_group = to_pci_epf_group(epf_vf_item); + struct pci_epf_group *epf_pf_group = to_pci_epf_group(epf_pf_item); + struct pci_epf *epf_pf = epf_pf_group->epf; + struct pci_epf *epf_vf = epf_vf_group->epf; + + return pci_epf_add_vepf(epf_pf, epf_vf); +} + +static void pci_epf_vepf_unlink(struct config_item *epf_pf_item, + struct config_item *epf_vf_item) +{ + struct pci_epf_group *epf_vf_group = to_pci_epf_group(epf_vf_item); + struct pci_epf_group *epf_pf_group = to_pci_epf_group(epf_pf_item); + struct pci_epf *epf_pf = epf_pf_group->epf; + struct pci_epf *epf_vf = epf_vf_group->epf; + + pci_epf_remove_vepf(epf_pf, epf_vf); +} + static void pci_epf_release(struct config_item *item) { struct pci_epf_group *epf_group = to_pci_epf_group(item); @@ -487,6 +509,8 @@ static void pci_epf_release(struct config_item *item) } static struct configfs_item_operations pci_epf_ops = { + .allow_link = pci_epf_vepf_link, + .drop_link = pci_epf_vepf_unlink, .release = pci_epf_release, };