From patchwork Wed Sep 15 09:50:35 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shameerali Kolothum Thodi X-Patchwork-Id: 12495883 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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 94FC1C433EF for ; Wed, 15 Sep 2021 09:52:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7633360C51 for ; Wed, 15 Sep 2021 09:52:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237559AbhIOJxX (ORCPT ); Wed, 15 Sep 2021 05:53:23 -0400 Received: from frasgout.his.huawei.com ([185.176.79.56]:3818 "EHLO frasgout.his.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237486AbhIOJxD (ORCPT ); Wed, 15 Sep 2021 05:53:03 -0400 Received: from fraeml734-chm.china.huawei.com (unknown [172.18.147.207]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4H8b5f1qBVz6H7c0; Wed, 15 Sep 2021 17:49:10 +0800 (CST) Received: from lhreml710-chm.china.huawei.com (10.201.108.61) by fraeml734-chm.china.huawei.com (10.206.15.215) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Wed, 15 Sep 2021 11:51:34 +0200 Received: from A2006125610.china.huawei.com (10.47.83.177) by lhreml710-chm.china.huawei.com (10.201.108.61) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Wed, 15 Sep 2021 10:51:28 +0100 From: Shameer Kolothum To: , , CC: , , , , , , , Subject: [PATCH v3 4/6] hisi-acc-vfio-pci: add new vfio_pci driver for HiSilicon ACC devices Date: Wed, 15 Sep 2021 10:50:35 +0100 Message-ID: <20210915095037.1149-5-shameerali.kolothum.thodi@huawei.com> X-Mailer: git-send-email 2.12.0.windows.1 In-Reply-To: <20210915095037.1149-1-shameerali.kolothum.thodi@huawei.com> References: <20210915095037.1149-1-shameerali.kolothum.thodi@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.47.83.177] X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) To lhreml710-chm.china.huawei.com (10.201.108.61) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Add a vendor-specific vfio_pci driver for HiSilicon ACC devices. This will be extended in subsequent patches to add support for VFIO live migration feature. Signed-off-by: Shameer Kolothum --- drivers/vfio/pci/Kconfig | 9 +++ drivers/vfio/pci/Makefile | 3 + drivers/vfio/pci/hisi_acc_vfio_pci.c | 99 ++++++++++++++++++++++++++++ 3 files changed, 111 insertions(+) create mode 100644 drivers/vfio/pci/hisi_acc_vfio_pci.c diff --git a/drivers/vfio/pci/Kconfig b/drivers/vfio/pci/Kconfig index 860424ccda1b..4fed27fa413d 100644 --- a/drivers/vfio/pci/Kconfig +++ b/drivers/vfio/pci/Kconfig @@ -43,4 +43,13 @@ config VFIO_PCI_IGD To enable Intel IGD assignment through vfio-pci, say Y. endif + +config HISI_ACC_VFIO_PCI + tristate "VFIO PCI support for HiSilicon ACC devices" + depends on ARM64 && VFIO_PCI_CORE + help + This provides generic PCI support for HiSilicon ACC devices + using the VFIO framework. + + If you don't know what to do here, say N. endif diff --git a/drivers/vfio/pci/Makefile b/drivers/vfio/pci/Makefile index 349d68d242b4..9d90b036cce6 100644 --- a/drivers/vfio/pci/Makefile +++ b/drivers/vfio/pci/Makefile @@ -7,3 +7,6 @@ obj-$(CONFIG_VFIO_PCI_CORE) += vfio-pci-core.o vfio-pci-y := vfio_pci.o vfio-pci-$(CONFIG_VFIO_PCI_IGD) += vfio_pci_igd.o obj-$(CONFIG_VFIO_PCI) += vfio-pci.o + +hisi-acc-vfio-pci-y := hisi_acc_vfio_pci.o +obj-$(CONFIG_HISI_ACC_VFIO_PCI) += hisi-acc-vfio-pci.o diff --git a/drivers/vfio/pci/hisi_acc_vfio_pci.c b/drivers/vfio/pci/hisi_acc_vfio_pci.c new file mode 100644 index 000000000000..c847bc469644 --- /dev/null +++ b/drivers/vfio/pci/hisi_acc_vfio_pci.c @@ -0,0 +1,99 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2021, HiSilicon Ltd. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static int hisi_acc_vfio_pci_open_device(struct vfio_device *core_vdev) +{ + struct vfio_pci_core_device *vdev = + container_of(core_vdev, struct vfio_pci_core_device, vdev); + int ret; + + ret = vfio_pci_core_enable(vdev); + if (ret) + return ret; + + vfio_pci_core_finish_enable(vdev); + + return 0; +} + +static const struct vfio_device_ops hisi_acc_vfio_pci_ops = { + .name = "hisi-acc-vfio-pci", + .open_device = hisi_acc_vfio_pci_open_device, + .close_device = vfio_pci_core_close_device, + .ioctl = vfio_pci_core_ioctl, + .read = vfio_pci_core_read, + .write = vfio_pci_core_write, + .mmap = vfio_pci_core_mmap, + .request = vfio_pci_core_request, + .match = vfio_pci_core_match, +}; + +static int hisi_acc_vfio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) +{ + struct vfio_pci_core_device *vdev; + int ret; + + vdev = kzalloc(sizeof(*vdev), GFP_KERNEL); + if (!vdev) + return -ENOMEM; + + vfio_pci_core_init_device(vdev, pdev, &hisi_acc_vfio_pci_ops); + + ret = vfio_pci_core_register_device(vdev); + if (ret) + goto out_free; + + dev_set_drvdata(&pdev->dev, vdev); + + return 0; + +out_free: + vfio_pci_core_uninit_device(vdev); + kfree(vdev); + return ret; +} + +static void hisi_acc_vfio_pci_remove(struct pci_dev *pdev) +{ + struct vfio_pci_core_device *vdev = dev_get_drvdata(&pdev->dev); + + vfio_pci_core_unregister_device(vdev); + vfio_pci_core_uninit_device(vdev); + kfree(vdev); +} + +static const struct pci_device_id hisi_acc_vfio_pci_table[] = { + { PCI_DRIVER_OVERRIDE_DEVICE_VFIO(PCI_VENDOR_ID_HUAWEI, SEC_VF_PCI_DEVICE_ID) }, + { PCI_DRIVER_OVERRIDE_DEVICE_VFIO(PCI_VENDOR_ID_HUAWEI, HPRE_VF_PCI_DEVICE_ID) }, + { PCI_DRIVER_OVERRIDE_DEVICE_VFIO(PCI_VENDOR_ID_HUAWEI, ZIP_VF_PCI_DEVICE_ID) }, + { 0, } +}; + +MODULE_DEVICE_TABLE(pci, hisi_acc_vfio_pci_table); + +static struct pci_driver hisi_acc_vfio_pci_driver = { + .name = "hisi-acc-vfio-pci", + .id_table = hisi_acc_vfio_pci_table, + .probe = hisi_acc_vfio_pci_probe, + .remove = hisi_acc_vfio_pci_remove, + .err_handler = &vfio_pci_core_err_handlers, +}; + +module_pci_driver(hisi_acc_vfio_pci_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Liu Longfang "); +MODULE_AUTHOR("Shameer Kolothum "); +MODULE_DESCRIPTION("HiSilicon VFIO PCI - Generic VFIO PCI driver for HiSilicon ACC device family");