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=ham 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 7103BC433FF for ; Wed, 14 Aug 2019 19:09:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3340A2084D for ; Wed, 14 Aug 2019 19:09:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=microsoft.com header.i=@microsoft.com header.b="k3ENHH9C" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729223AbfHNTJH (ORCPT ); Wed, 14 Aug 2019 15:09:07 -0400 Received: from mail-eopbgr800097.outbound.protection.outlook.com ([40.107.80.97]:42124 "EHLO NAM03-DM3-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728773AbfHNTJG (ORCPT ); Wed, 14 Aug 2019 15:09:06 -0400 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=WiKK2MJFeo9m9sQLAbf/q4/p8OWVOwArIZ0L4bvaVugHnjbUcIAa1t2xFa4ZLsXgp0lHdKfOnWeyObMzISZ7xbX9nqNGApg+1+XSxe9ih2XMdqGgjG0URNu8wvwteP8b1i4ck5FVqP0iXUXSTyG6XTpxRGlVoLYyzlk2U2Q//CAFe4pTP65WlPxHgV+wOfS7qmgcI47OobEAS7dHGgpCVIhZvsLS3PDO6rPDxKMy5Wj33c3FGxvwxWCNBFgjl+Xkpd2YP6saSQ68ua7NnsYcSPObrKLVgQd7/Xci0UXssBQ7VYfHKlfrBkIDOJy9KgzobccXvxcUo1jsHqYCdLJ2VQ== 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=eW1eikBVYvq9db/ly7py2Z6YmLH53zbxipiJ9c0wX14=; b=FX8KNPmRDVIObkDUlTfv/XnUtbnOaHXcnkZCjEorkyxHIlSJXYmE2/AH7emie6UUQQarMGrvk8NqHxa2GvOflvEW7ozt0SOYj/R5Qr+E5E709N1IwXjlEbkqRg2KTrfGw5tVIHjt21R6gtTNtPVBneyMWDK3FD2qUU1M4a1ZgQCVZoeF87N1YiQZ1/g1eFWVipQWIqAz3UEUDUXzd1hjOeqdRZQ9wVk+m+yyAxg6p8QPyT9qAen1CPyx2Zh+CyRAycbe+ojWLhDAAxvtgDV0pxoAUmjrTx1fkKEVS6T762z+p73M2i4YrbxVv8un0GDkS5nSgzALzOkE+2pmAlxzKA== 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=eW1eikBVYvq9db/ly7py2Z6YmLH53zbxipiJ9c0wX14=; b=k3ENHH9CrSPeLOtrgrj8T47N189GHBCZOxZm3XPDD2H8O6aMTGd7GvLBPXZyLlQQGwyPhwiLFXM8db6ke7hBH7ClD3S/AEthTZgVw3HPQwGZTW0L7WMURT9t2Li8POJyuNRBtOq9jV4wOJf5nFjh9BnRfRbdJkPU8yolzNwxToQ= Received: from DM6PR21MB1242.namprd21.prod.outlook.com (20.179.50.86) by DM6PR21MB1338.namprd21.prod.outlook.com (20.179.53.81) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2178.6; Wed, 14 Aug 2019 19:08:55 +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; Wed, 14 Aug 2019 19:08:55 +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, 2/6] PCI: hv: Add a Hyper-V PCI mini driver for software backchannel interface Thread-Topic: [PATCH net-next, 2/6] PCI: hv: Add a Hyper-V PCI mini driver for software backchannel interface Thread-Index: AQHVUtO3Aa5ZNhht3k+GwnmN//OdcQ== Date: Wed, 14 Aug 2019 19:08:55 +0000 Message-ID: <1565809632-39138-3-git-send-email-haiyangz@microsoft.com> References: <1565809632-39138-1-git-send-email-haiyangz@microsoft.com> In-Reply-To: <1565809632-39138-1-git-send-email-haiyangz@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: CO2PR05CA0107.namprd05.prod.outlook.com (2603:10b6:104:1::33) 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: 0a9b04cf-67b1-4113-0e09-08d720eada38 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:DM6PR21MB1338; x-ms-traffictypediagnostic: DM6PR21MB1338:|DM6PR21MB1338: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:7691; x-forefront-prvs: 01294F875B x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(4636009)(136003)(39860400002)(366004)(346002)(396003)(376002)(189003)(199004)(6486002)(110136005)(6392003)(54906003)(4326008)(10090500001)(26005)(14454004)(256004)(2906002)(53936002)(6116002)(66066001)(6436002)(3846002)(6512007)(7416002)(66476007)(66446008)(76176011)(66556008)(2201001)(64756008)(66946007)(8936002)(22452003)(71200400001)(7736002)(71190400001)(50226002)(102836004)(5660300002)(81166006)(4720700003)(446003)(316002)(478600001)(305945005)(7846003)(186003)(99286004)(2501003)(36756003)(81156014)(8676002)(25786009)(476003)(11346002)(52116002)(6506007)(2616005)(486006)(10290500003)(386003)(921003)(1121003);DIR:OUT;SFP:1102;SCL:1;SRVR:DM6PR21MB1338;H:DM6PR21MB1242.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: Fswhx158o4Gd+YQArlsDkxj8ISabbnDqmM3MWOzpNpW722VQhE6MeHdeuq/7iSAzjQ47wQr8MtllyuzRoIvGHRY0rlFSwEzUU9ZZbRu8db0lSBY/3/6I/Q6lI+t0DGb7vzgH91s6i9MHZpqxnvh/XUZsU+1skpFpD3IS5VFcca8nSaYs1FLcBi/QLAFC7D2XAvryf+zRaIJ/E0qrDZlJoaW3nO1yRLT2h0ETSIX+YUi0ANl3ph0UKetSHOXwUlnPqArPlbgNlVhJFniveFNzPjVdX3d3lW1dUGQ3FxUBwQvJggrBACxAtmpNmxoO7+RnuIL0BsNd18GXpY4bVl2eHN3s0m3D/Y1gxj42UkIoy66xsiHYerNzrRKSzqWPoVLpfmxWHlq5F1C170DaqnObWpPn4CAia0fb4LdyDsdd8qg= 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: 0a9b04cf-67b1-4113-0e09-08d720eada38 X-MS-Exchange-CrossTenant-originalarrivaltime: 14 Aug 2019 19:08:55.2946 (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: yWSx/5Tdt9DoD76xAetgUv9p6HeKwZdwHFZJdHlG0LYM7+4YoBSLTOKxuv6NGrk9W5qa14lg5tLrd5H7PnAlJg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR21MB1338 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This mini 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-mini.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-mini.c diff --git a/MAINTAINERS b/MAINTAINERS index e352550..c4962b9 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-mini.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..bb852f5 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_MINI 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..8e31cba 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_MINI + tristate "Hyper-V PCI Mini" + depends on X86 && HYPERV && PCI_MSI && PCI_MSI_IRQ_DOMAIN && X86_64 + help + The Hyper-V PCI Mini 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..77e0132 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-$(CONFIG_PCI_HYPERV_MINI) +=3D pci-hyperv-mini.o obj-$(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-mini.c b/drivers/pci/control= ler/pci-hyperv-mini.c new file mode 100644 index 0000000..9b6cd1c --- /dev/null +++ b/drivers/pci/controller/pci-hyperv-mini.c @@ -0,0 +1,70 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) Microsoft Corporation. + * + * Author: + * Haiyang Zhang + * + * This mini driver 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_mini(void) +{ + pr_info("unloaded\n"); +} + +static int __init init_hv_pci_mini(void) +{ + pr_info("loaded\n"); + + return 0; +} + +module_init(init_hv_pci_mini); +module_exit(exit_hv_pci_mini); + +MODULE_DESCRIPTION("Hyper-V PCI Mini"); +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