Received: by 2002:a25:8b12:0:0:0:0:0 with SMTP id i18csp553324ybl; Thu, 22 Aug 2019 00:59:52 -0700 (PDT) X-Google-Smtp-Source: APXvYqyMnGOCgpdGsmUU+3bumsVKZ3wk92DvuPdsq9+/ZbhyncxN6Xt3nkvvXilqT7vU621VjU6g X-Received: by 2002:a17:90a:32a3:: with SMTP id l32mr4244583pjb.14.1566460792079; Thu, 22 Aug 2019 00:59:52 -0700 (PDT) ARC-Seal: i=2; a=rsa-sha256; t=1566460792; cv=pass; d=google.com; s=arc-20160816; b=0oJ587Uh35Gytfyuc6Fntrt1wdElLjHhAJCcVcwX57b68QCTTjmkatMxXJ2qgGsw84 SLijUrFBb23HW0BFW4IXnokN39AFkNQpazIwC5s5ZZtdjmEcpOmd1WFgzGHveOqW2BvU 8OGyC+H/OU0MpVxiZqSa486DOatR7LZUayXUewl9gbLLUkuR8wySawSr/Q0ursqEV0YN SIlIbcs5PLyFnsXcmGOrlyuAaD1fgFo546QTOywLSPUNf7CDA+/OLphx7qqxERgIzF9e 2p5LdMKqk4kFJ6MRvYA6MxByTo7xm3/Qh7I2+0u7T8TCJgya22BTg9/9I+Hr42/PuCnj kMGg== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:content-transfer-encoding :content-language:accept-language:in-reply-to:references:message-id :date:thread-index:thread-topic:subject:cc:to:from:dkim-signature; bh=49pCCLY0UQGnJr+msFhZ/lhUbgof+155r2+qubA1C+M=; b=oNKI4jRfpxqEP87j5kiKHcwFtUa8UZdOLn2Pb8Gbs2PCRiE6Nj0vsE3QEeHxhCAq16 v+tjbkgxHvdjRdyPSscs/XXzR0ldSFVsl8Qb7+cDr4vQ80qjPx8XpylCfr3UFTJZeq7K cimD9lFPyhUZ3rtreaJNvOmteBjbrbcSn5OsF/Vdinh5l/GCIMpdIst1TbsxK0OgAF4s Ja41rA9W+gDUFf1rWmc9WalQct22Wk1jS60Sw3qrN20YXcdn3hAdpy1DLI3vk/Il2GN2 +XYCAkTWE9UmdnLRN5n2y4NOsNxmTQuw0dvLg2kS+DgnZmIi/zL9q1niFcCUpNfZL+dP IJ7Q== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@microsoft.com header.s=selector1 header.b=LJSQO+uY; arc=pass (i=1 spf=pass spfdomain=microsoft.com dkim=pass dkdomain=microsoft.com dmarc=pass fromdomain=microsoft.com); spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=microsoft.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id c193si17971135pfb.115.2019.08.22.00.59.36; Thu, 22 Aug 2019 00:59:52 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@microsoft.com header.s=selector1 header.b=LJSQO+uY; arc=pass (i=1 spf=pass spfdomain=microsoft.com dkim=pass dkdomain=microsoft.com dmarc=pass fromdomain=microsoft.com); spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=microsoft.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731321AbfHVFF7 (ORCPT + 99 others); Thu, 22 Aug 2019 01:05:59 -0400 Received: from mail-eopbgr810109.outbound.protection.outlook.com ([40.107.81.109]:28619 "EHLO NAM01-BY2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1731265AbfHVFF6 (ORCPT ); Thu, 22 Aug 2019 01:05:58 -0400 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=TkPtwYFnYZI/Tw4k7pPQtxCvNqnyyON489wgbNGDI4jV+JLfNPEWztCdk6Ui4j0tM+Tay7vr4Oi/eZtI6YNGcZcgUtrUnw7WkL3sDGiZw4h636wbwiFCPWXf6a6LnWfXBei5ilfpsJDu0fYvrqM+7SF2Xb9BFXgEMXMlEAYvZHnMqV8kRCqeNnZZqlWsBgOVQ4hUKdx+v4dj+gKOKzpeQQ7Yz1BM7EbJQIBT3FwqHLqAkd066GZTRU9suBSff3yrgbtdBR+1xbndQ4/Th4iOHY7BJQIzfm528ZenNivK1+kRGpwcaqd1ThYxnq2Nw/JEndYGsCAXSpqJVW4B9ekicg== 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=49pCCLY0UQGnJr+msFhZ/lhUbgof+155r2+qubA1C+M=; b=jDoBaVB25UbAHKXDbaMS/agrHDlkKxo9EizbOS3w9cp8acb5OPGxn/QBboR4NLXPVLhmWqECsUEhFYZwftwWv8WRVr8gvs0G5Il/vzd74lLwjv32baK9C3ZdC96SlFzfeGVsxMtZnaz5WdM264tpQsHIpapOQnB7QcG/2hrebrFEYEcH17QCNTjrOJmPyvf1eAkka9sPnrJgA40lFXaa/zYZ4r7rLxvqR9ABCE56FDVko92Lj34sjOeY8c1yZAxIl9qMbuiNOVnuh5Ptq6hzkQ2exfx/oYlB9l9Ip/e1TLWQV7y9jtHF2H29hBHztjgctqQ1F4dItZvaDwFAtl55lw== 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=49pCCLY0UQGnJr+msFhZ/lhUbgof+155r2+qubA1C+M=; b=LJSQO+uYHJpdU/1w7GHsK3EaRQe99OQFpEF7x57EbR5z7QfUltwzd2sRqVfH+frDVGUAFfF7Q5U44TqNHYVYgW+SJRI5wiP3uT070qsL3+aFrh0BrwOjgmPV4ktLnSXaImGJURCDHCakCgcAqO4//G8o3q+nvo8wYU5z1pPBSmY= Received: from MN2PR21MB1248.namprd21.prod.outlook.com (20.179.20.225) by MN2PR21MB1279.namprd21.prod.outlook.com (20.179.21.91) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2220.4; Thu, 22 Aug 2019 05:05:41 +0000 Received: from MN2PR21MB1248.namprd21.prod.outlook.com ([fe80::147a:ea1f:326d:832e]) by MN2PR21MB1248.namprd21.prod.outlook.com ([fe80::147a:ea1f:326d:832e%3]) with mapi id 15.20.2199.011; Thu, 22 Aug 2019 05:05:41 +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,v4, 2/6] PCI: hv: Add a Hyper-V PCI interface driver for software backchannel interface Thread-Topic: [PATCH net-next,v4, 2/6] PCI: hv: Add a Hyper-V PCI interface driver for software backchannel interface Thread-Index: AQHVWKc+GNFRZDxadEKTuhFzjn601Q== Date: Thu, 22 Aug 2019 05:05:41 +0000 Message-ID: <1566450236-36757-3-git-send-email-haiyangz@microsoft.com> References: <1566450236-36757-1-git-send-email-haiyangz@microsoft.com> In-Reply-To: <1566450236-36757-1-git-send-email-haiyangz@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: MWHPR14CA0039.namprd14.prod.outlook.com (2603:10b6:300:12b::25) To MN2PR21MB1248.namprd21.prod.outlook.com (2603:10b6:208:3b::33) 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: 6cc3dabc-c434-4b75-a945-08d726be60fb 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:MN2PR21MB1279; x-ms-traffictypediagnostic: MN2PR21MB1279:|MN2PR21MB1279: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:7691; x-forefront-prvs: 01371B902F x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(4636009)(39860400002)(396003)(136003)(366004)(376002)(346002)(189003)(199004)(71200400001)(71190400001)(186003)(446003)(66066001)(2616005)(4326008)(36756003)(6392003)(6436002)(256004)(53936002)(7846003)(7416002)(6512007)(26005)(6486002)(11346002)(316002)(2906002)(2201001)(110136005)(22452003)(54906003)(10090500001)(476003)(25786009)(386003)(7736002)(64756008)(81156014)(66946007)(66446008)(8936002)(10290500003)(478600001)(66476007)(2501003)(102836004)(4720700003)(6116002)(3846002)(6506007)(305945005)(5660300002)(486006)(99286004)(66556008)(81166006)(14454004)(50226002)(8676002)(52116002)(76176011)(142933001)(921003)(1121003);DIR:OUT;SFP:1102;SCL:1;SRVR:MN2PR21MB1279;H:MN2PR21MB1248.namprd21.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;MX:1;A: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: 72v0/CFGN8vThzVMTEhTdEdxs/E/tKB6nRzM6iykUNo4cEGmzfBkG9uF25cFTlpQBf7pgSjHhbE73mEExtYpLJPOAx+uYf4s2e/TZ17OPQiIjrlj2eV/78M9hY8DN09KhP/cXSQQc9KhsyIm9qiiHm5++wH+2WBITzUBp58mGRNPKpXMHmvsHlX3k5HEx/Bk3KcWX8XqOwddGHeVWpQTMD+bS3F/7luEjeYEjQUYcYkywg9mf+LLodiqZT35KcA0Eqkuv8sQK5PRaHHYK7JDMRIney95HOrsjVbnSBrqaQmxbbT9gz8ZdlQWacYoCMXFCHe/DRDDploZAWPVL+x+zOrDJ5B/vFCd5e/aKe5xm9/h+puwY4erTioe4Ard4OshjHTxPwl2JcSJLpzF6sP8672jC9JZy/HeZJ2oCN+OPik= 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: 6cc3dabc-c434-4b75-a945-08d726be60fb X-MS-Exchange-CrossTenant-originalarrivaltime: 22 Aug 2019 05:05:41.1020 (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: TaUir6IjTJRJOpq7UNeP5OJE0+rky/6WYXoU0LxdrcCIgK3zTTLhYb+hFOCFUP3ESxTrOyN1zw3kAKEWegWTqA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR21MB1279 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 | 67 ++++++++++++++++++++++++++++= ++++ drivers/pci/controller/pci-hyperv.c | 12 ++++-- include/linux/hyperv.h | 30 ++++++++++---- 7 files changed, 108 insertions(+), 11 deletions(-) create mode 100644 drivers/pci/controller/pci-hyperv-intf.c diff --git a/MAINTAINERS b/MAINTAINERS index a406947..9860853 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -7469,6 +7469,7 @@ 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..cc96be4 --- /dev/null +++ b/drivers/pci/controller/pci-hyperv-intf.c @@ -0,0 +1,67 @@ +// 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_GPL(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_GPL(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_GPL(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_GPL(hyperv_reg_block_invalidate); + +static void __exit exit_hv_pci_intf(void) +{ +} + +static int __init init_hv_pci_intf(void) +{ + 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