From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,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 89DA4C3A5A0 for ; Mon, 19 Aug 2019 19:30:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 51C17206C1 for ; Mon, 19 Aug 2019 19:30:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=microsoft.com header.i=@microsoft.com header.b="W+UbysZB" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728553AbfHSTau (ORCPT ); Mon, 19 Aug 2019 15:30:50 -0400 Received: from mail-eopbgr810137.outbound.protection.outlook.com ([40.107.81.137]:27275 "EHLO NAM01-BY2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728348AbfHSTau (ORCPT ); Mon, 19 Aug 2019 15:30:50 -0400 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=c3tPWKT68cwmXVajWzjDYqAKpAfvcM7GMqOHzb0P47eJR1llqMRWbKTNyfrhp+rcwTldc/ALNlU9HyHB2yCyoc/KokdEvCjJJY4EvIqvA1clWbeqAIfwk7qLnx/lEqk3GsS8hBnL6IWUgrqRn5lmnklUQfe4ls/d+K9ThVCvkZfSodsCAd5K3a3RQZnEGY3faHwCSts3/ONXIqilfs0a3Y2Yi51QeiLg6tUfExRPebTjrp/d6KDHJSHuW4v7QvQvycEWcQBbWzfFLMG1tTbovovS85SQ869I0SzfJ449UmvrZpQUGIjlPo0OWoMgAu6yc41xfqwt2ALcdcMSz6pn2Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=meFRSjrkfQ5GM1raLipnx6xLgcdL7PzQxOHfmcGNbL4=; b=n3nuwYX5ufCb3Z2hqsqAXvFyTb7ENgLOJa9kFk/L1XuBLTPpwXHStvAw0nFd2QDJNaKCtAwkOsqljpKDZzhmktZA7p2jX6Tt+ohIqDKqF0YZqiWs61GfbGLROiQAOGFgwivlqFWvbgfu2kgFjDP7aKz3nJEq74uCt6/SiNmzyoTrhJrhyzY93JObiL3P46lsm4JsjUvR3hnL6i9YEkGC7xW+NYWnkhRs5JeSHrSAy3F8md2kgoV5QEYjD8D2gBsxYHPEcfCqHSC7aESZhspLRBI2FEpmMouNxHTca79jwnmh7sXmG1gw24CeajXRsQ01Vq6d0p0pKEZksTc5aXOfyw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=microsoft.com; dmarc=pass action=none header.from=microsoft.com; dkim=pass header.d=microsoft.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=meFRSjrkfQ5GM1raLipnx6xLgcdL7PzQxOHfmcGNbL4=; b=W+UbysZBL8p3bL270otAgx1yv1ly/dqwlPaGki3E/hYsOTm6KJiIJAs/PzBpKpuqo62IgjSVVCAVj4jjHGlLelf5851zhaDjom44AGQo/RSfDAoRYO0WBQu7Zlio3bNgmvMJQfCE8HRLcTgvi1wridJrMEsnSaprGRXSCbfgQZQ= Received: from DM6PR21MB1242.namprd21.prod.outlook.com (20.179.50.86) by DM6PR21MB1145.namprd21.prod.outlook.com (20.179.50.138) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2178.11; Mon, 19 Aug 2019 19:30:47 +0000 Received: from DM6PR21MB1242.namprd21.prod.outlook.com ([fe80::ddd:8e5b:2930:6726]) by DM6PR21MB1242.namprd21.prod.outlook.com ([fe80::ddd:8e5b:2930:6726%9]) with mapi id 15.20.2178.006; Mon, 19 Aug 2019 19:30:47 +0000 From: Haiyang Zhang To: "sashal@kernel.org" , "davem@davemloft.net" , "saeedm@mellanox.com" , "leon@kernel.org" , "eranbe@mellanox.com" , "lorenzo.pieralisi@arm.com" , "bhelgaas@google.com" , "linux-pci@vger.kernel.org" , "linux-hyperv@vger.kernel.org" , "netdev@vger.kernel.org" CC: Haiyang Zhang , KY Srinivasan , Stephen Hemminger , "linux-kernel@vger.kernel.org" Subject: [PATCH net-next,v2 2/6] PCI: hv: Add a Hyper-V PCI interface driver for software backchannel interface Thread-Topic: [PATCH net-next,v2 2/6] PCI: hv: Add a Hyper-V PCI interface driver for software backchannel interface Thread-Index: AQHVVsSZxbD4Awaly0aTwWdbXM5+xQ== Date: Mon, 19 Aug 2019 19:30:47 +0000 Message-ID: <1566242976-108801-3-git-send-email-haiyangz@microsoft.com> References: <1566242976-108801-1-git-send-email-haiyangz@microsoft.com> In-Reply-To: <1566242976-108801-1-git-send-email-haiyangz@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: MWHPR12CA0059.namprd12.prod.outlook.com (2603:10b6:300:103::21) To DM6PR21MB1242.namprd21.prod.outlook.com (2603:10b6:5:169::22) authentication-results: spf=none (sender IP is ) smtp.mailfrom=lkmlhyz@microsoft.com; x-ms-exchange-messagesentrepresentingtype: 2 x-mailer: git-send-email 1.8.3.1 x-originating-ip: [13.77.154.182] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 395a0cee-10c2-490a-b9d4-08d724dbbc2b x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(5600158)(711020)(4605104)(1401327)(4618075)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(2017052603328)(7193020);SRVR:DM6PR21MB1145; x-ms-traffictypediagnostic: DM6PR21MB1145:|DM6PR21MB1145: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:7691; x-forefront-prvs: 0134AD334F x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(4636009)(376002)(346002)(39860400002)(366004)(396003)(136003)(199004)(189003)(52116002)(99286004)(110136005)(76176011)(2201001)(386003)(186003)(6506007)(476003)(71190400001)(10090500001)(11346002)(22452003)(6116002)(7846003)(6512007)(6392003)(71200400001)(256004)(53936002)(81156014)(8676002)(81166006)(6436002)(4326008)(102836004)(305945005)(4720700003)(26005)(7416002)(7736002)(36756003)(6486002)(486006)(66066001)(3846002)(54906003)(66446008)(66946007)(66556008)(25786009)(14454004)(2501003)(50226002)(8936002)(64756008)(2906002)(5660300002)(2616005)(66476007)(478600001)(10290500003)(316002)(446003)(921003)(142933001)(1121003);DIR:OUT;SFP:1102;SCL:1;SRVR:DM6PR21MB1145;H:DM6PR21MB1242.namprd21.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;A:1;MX:1; received-spf: None (protection.outlook.com: microsoft.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: fx5Jl440ZGliAFKxYmPflC60gua9x7CNaPNR1z/L+SLQyYzOPDWtmWhYcEuZFIO9OCbWY5NvcKFp6SnyaZE/Em0Z1mMbX8tHU8+W/KCcdCG48EaHSsFYmN8D05H537wS3eHYx+831awJEoIdTFBNIIt9YtkuyuTNFAcMi7phRZL8xCEdjpdp5rTNPL1DfUAn/5A6n3t98aXDPQUxVT0bZBiirLrsHm2nCaSh/d9YVP+9I3LDSsfuWwJTrfhGtwoIPXi0GuN2GgzNV8d+FT0devpaWSegFpio2KSceHBrI7acACVlUHQj7t6zRlzt3mlR/WTXQJ/Xf9Ni+mazbYY8EjMNNfGU++NQayhHOMQ5eRK37EQQSleO9mnsJbbnHDZ3L9sjEClkk9CFwaHEHY9nY5rNiX8/GZ1EvueSRei1Fmc= Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: 395a0cee-10c2-490a-b9d4-08d724dbbc2b X-MS-Exchange-CrossTenant-originalarrivaltime: 19 Aug 2019 19:30:47.0494 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: Pmdf91izEaz+DIVOuJb7V94cEXrY6hZH9ITth6u3XlW+kMCN1JaOEg0jc2ZkUKgJEz9Mb2JG0uSPIKjyWJMqsg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR21MB1145 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org This interface driver is a helper driver allows other drivers to have a common interface with the Hyper-V PCI frontend driver. Signed-off-by: Haiyang Zhang Signed-off-by: Saeed Mahameed --- MAINTAINERS | 1 + drivers/pci/Kconfig | 1 + drivers/pci/controller/Kconfig | 7 ++++ drivers/pci/controller/Makefile | 1 + drivers/pci/controller/pci-hyperv-intf.c | 70 ++++++++++++++++++++++++++++= ++++ drivers/pci/controller/pci-hyperv.c | 12 ++++-- include/linux/hyperv.h | 30 ++++++++++---- 7 files changed, 111 insertions(+), 11 deletions(-) create mode 100644 drivers/pci/controller/pci-hyperv-intf.c diff --git a/MAINTAINERS b/MAINTAINERS index e352550..866ae88 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -7453,6 +7453,7 @@ F: drivers/hid/hid-hyperv.c F: drivers/hv/ F: drivers/input/serio/hyperv-keyboard.c F: drivers/pci/controller/pci-hyperv.c +F: drivers/pci/controller/pci-hyperv-intf.c F: drivers/net/hyperv/ F: drivers/scsi/storvsc_drv.c F: drivers/uio/uio_hv_generic.c diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig index 2ab9240..c313de9 100644 --- a/drivers/pci/Kconfig +++ b/drivers/pci/Kconfig @@ -182,6 +182,7 @@ config PCI_LABEL config PCI_HYPERV tristate "Hyper-V PCI Frontend" depends on X86 && HYPERV && PCI_MSI && PCI_MSI_IRQ_DOMAIN && X86_6= 4 + select PCI_HYPERV_INTERFACE help The PCI device frontend driver allows the kernel to import arbit= rary PCI devices from a PCI backend to support PCI driver domains. diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfi= g index fe9f9f1..70e0782 100644 --- a/drivers/pci/controller/Kconfig +++ b/drivers/pci/controller/Kconfig @@ -281,5 +281,12 @@ config VMD To compile this driver as a module, choose M here: the module will be called vmd. =20 +config PCI_HYPERV_INTERFACE + tristate "Hyper-V PCI Interface" + depends on X86 && HYPERV && PCI_MSI && PCI_MSI_IRQ_DOMAIN && X86_64 + help + The Hyper-V PCI Interface is a helper driver allows other drivers to + have a common interface with the Hyper-V PCI frontend driver. + source "drivers/pci/controller/dwc/Kconfig" endmenu diff --git a/drivers/pci/controller/Makefile b/drivers/pci/controller/Makef= ile index d56a507..a2a22c9 100644 --- a/drivers/pci/controller/Makefile +++ b/drivers/pci/controller/Makefile @@ -4,6 +4,7 @@ obj-$(CONFIG_PCIE_CADENCE_HOST) +=3D pcie-cadence-host.o obj-$(CONFIG_PCIE_CADENCE_EP) +=3D pcie-cadence-ep.o obj-$(CONFIG_PCI_FTPCI100) +=3D pci-ftpci100.o obj-$(CONFIG_PCI_HYPERV) +=3D pci-hyperv.o +obj-$(CONFIG_PCI_HYPERV_INTERFACE) +=3D pci-hyperv-intf.o obj-$(CONFIG_PCI_MVEBU) +=3D pci-mvebu.o obj-$(CONFIG_PCI_AARDVARK) +=3D pci-aardvark.o obj-$(CONFIG_PCI_TEGRA) +=3D pci-tegra.o diff --git a/drivers/pci/controller/pci-hyperv-intf.c b/drivers/pci/control= ler/pci-hyperv-intf.c new file mode 100644 index 0000000..087b7eb --- /dev/null +++ b/drivers/pci/controller/pci-hyperv-intf.c @@ -0,0 +1,70 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) Microsoft Corporation. + * + * Author: + * Haiyang Zhang + * + * This small module is a helper driver allows other drivers to + * have a common interface with the Hyper-V PCI frontend driver. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include + +struct hyperv_pci_block_ops hvpci_block_ops; +EXPORT_SYMBOL(hvpci_block_ops); + +int hyperv_read_cfg_blk(struct pci_dev *dev, void *buf, unsigned int buf_l= en, + unsigned int block_id, unsigned int *bytes_returned) +{ + if (!hvpci_block_ops.read_block) + return -EOPNOTSUPP; + + return hvpci_block_ops.read_block(dev, buf, buf_len, block_id, + bytes_returned); +} +EXPORT_SYMBOL(hyperv_read_cfg_blk); + +int hyperv_write_cfg_blk(struct pci_dev *dev, void *buf, unsigned int len, + unsigned int block_id) +{ + if (!hvpci_block_ops.write_block) + return -EOPNOTSUPP; + + return hvpci_block_ops.write_block(dev, buf, len, block_id); +} +EXPORT_SYMBOL(hyperv_write_cfg_blk); + +int hyperv_reg_block_invalidate(struct pci_dev *dev, void *context, + void (*block_invalidate)(void *context, + u64 block_mask)) +{ + if (!hvpci_block_ops.reg_blk_invalidate) + return -EOPNOTSUPP; + + return hvpci_block_ops.reg_blk_invalidate(dev, context, + block_invalidate); +} +EXPORT_SYMBOL(hyperv_reg_block_invalidate); + +static void __exit exit_hv_pci_intf(void) +{ + pr_info("unloaded\n"); +} + +static int __init init_hv_pci_intf(void) +{ + pr_info("loaded\n"); + + return 0; +} + +module_init(init_hv_pci_intf); +module_exit(exit_hv_pci_intf); + +MODULE_DESCRIPTION("Hyper-V PCI Interface"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/pci/controller/pci-hyperv.c b/drivers/pci/controller/p= ci-hyperv.c index 57adeca..9c93ac2 100644 --- a/drivers/pci/controller/pci-hyperv.c +++ b/drivers/pci/controller/pci-hyperv.c @@ -983,7 +983,6 @@ int hv_read_config_block(struct pci_dev *pdev, void *bu= f, unsigned int len, *bytes_returned =3D comp_pkt.bytes_returned; return 0; } -EXPORT_SYMBOL(hv_read_config_block); =20 /** * hv_pci_write_config_compl() - Invoked when a response packet for a writ= e @@ -1070,7 +1069,6 @@ int hv_write_config_block(struct pci_dev *pdev, void = *buf, unsigned int len, =20 return 0; } -EXPORT_SYMBOL(hv_write_config_block); =20 /** * hv_register_block_invalidate() - Invoked when a config block invalidati= on @@ -1101,7 +1099,6 @@ int hv_register_block_invalidate(struct pci_dev *pdev= , void *context, return 0; =20 } -EXPORT_SYMBOL(hv_register_block_invalidate); =20 /* Interrupt management hooks */ static void hv_int_desc_free(struct hv_pci_dev *hpdev, @@ -3045,10 +3042,19 @@ static int hv_pci_remove(struct hv_device *hdev) static void __exit exit_hv_pci_drv(void) { vmbus_driver_unregister(&hv_pci_drv); + + hvpci_block_ops.read_block =3D NULL; + hvpci_block_ops.write_block =3D NULL; + hvpci_block_ops.reg_blk_invalidate =3D NULL; } =20 static int __init init_hv_pci_drv(void) { + /* Initialize PCI block r/w interface */ + hvpci_block_ops.read_block =3D hv_read_config_block; + hvpci_block_ops.write_block =3D hv_write_config_block; + hvpci_block_ops.reg_blk_invalidate =3D hv_register_block_invalidate; + return vmbus_driver_register(&hv_pci_drv); } =20 diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index 9d37f8c..2afe6fd 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -1579,18 +1579,32 @@ struct vmpacket_descriptor * pkt =3D hv_pkt_iter_next(channel, pkt)) =20 /* - * Functions for passing data between SR-IOV PF and VF drivers. The VF dr= iver + * Interface for passing data between SR-IOV PF and VF drivers. The VF dri= ver * sends requests to read and write blocks. Each block must be 128 bytes o= r * smaller. Optionally, the VF driver can register a callback function whi= ch * will be invoked when the host says that one or more of the first 64 blo= ck * IDs is "invalid" which means that the VF driver should reread them. */ #define HV_CONFIG_BLOCK_SIZE_MAX 128 -int hv_read_config_block(struct pci_dev *dev, void *buf, unsigned int buf_= len, - unsigned int block_id, unsigned int *bytes_returned); -int hv_write_config_block(struct pci_dev *dev, void *buf, unsigned int len= , - unsigned int block_id); -int hv_register_block_invalidate(struct pci_dev *dev, void *context, - void (*block_invalidate)(void *context, - u64 block_mask)); + +int hyperv_read_cfg_blk(struct pci_dev *dev, void *buf, unsigned int buf_l= en, + unsigned int block_id, unsigned int *bytes_returned); +int hyperv_write_cfg_blk(struct pci_dev *dev, void *buf, unsigned int len, + unsigned int block_id); +int hyperv_reg_block_invalidate(struct pci_dev *dev, void *context, + void (*block_invalidate)(void *context, + u64 block_mask)); + +struct hyperv_pci_block_ops { + int (*read_block)(struct pci_dev *dev, void *buf, unsigned int buf_len, + unsigned int block_id, unsigned int *bytes_returned); + int (*write_block)(struct pci_dev *dev, void *buf, unsigned int len, + unsigned int block_id); + int (*reg_blk_invalidate)(struct pci_dev *dev, void *context, + void (*block_invalidate)(void *context, + u64 block_mask)); +}; + +extern struct hyperv_pci_block_ops hvpci_block_ops; + #endif /* _HYPERV_H */ --=20 1.8.3.1