From patchwork Fri Jul 2 09:58:46 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: 12355817 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=-16.8 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 43E55C11F6A for ; Fri, 2 Jul 2021 09:59:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3175D61413 for ; Fri, 2 Jul 2021 09:59:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231490AbhGBKCH (ORCPT ); Fri, 2 Jul 2021 06:02:07 -0400 Received: from frasgout.his.huawei.com ([185.176.79.56]:3343 "EHLO frasgout.his.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231466AbhGBKB7 (ORCPT ); Fri, 2 Jul 2021 06:01:59 -0400 Received: from fraeml738-chm.china.huawei.com (unknown [172.18.147.207]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4GGVdz3gjPz6GB9V; Fri, 2 Jul 2021 17:48:55 +0800 (CST) Received: from lhreml710-chm.china.huawei.com (10.201.108.61) by fraeml738-chm.china.huawei.com (10.206.15.219) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Fri, 2 Jul 2021 11:59:26 +0200 Received: from A2006125610.china.huawei.com (10.47.85.147) 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 15.1.2176.2; Fri, 2 Jul 2021 10:59:19 +0100 From: Shameer Kolothum To: , , CC: , , , , , , , , Subject: [RFC v2 1/4] hisi-acc-vfio-pci: add new vfio_pci driver for HiSilicon ACC devices Date: Fri, 2 Jul 2021 10:58:46 +0100 Message-ID: <20210702095849.1610-2-shameerali.kolothum.thodi@huawei.com> X-Mailer: git-send-email 2.12.0.windows.1 In-Reply-To: <20210702095849.1610-1-shameerali.kolothum.thodi@huawei.com> References: <20210702095849.1610-1-shameerali.kolothum.thodi@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.47.85.147] X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) 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 follow-up patches to add support for vfio live migration feature. Signed-off-by: Shameer Kolothum --- drivers/vfio/pci/Kconfig | 9 +++ drivers/vfio/pci/Makefile | 2 + drivers/vfio/pci/hisi_acc_vfio_pci.c | 100 +++++++++++++++++++++++++++ 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 9cdef46dd299..709807c28153 100644 --- a/drivers/vfio/pci/Kconfig +++ b/drivers/vfio/pci/Kconfig @@ -57,3 +57,12 @@ config MLX5_VFIO_PCI framework. If you don't know what to do here, say N. + +config HISI_ACC_VFIO_PCI + tristate "VFIO support for HiSilicon ACC devices" + depends on ARM64 && VFIO_PCI_CORE + help + This provides generic PCI support for HiSilicon devices using the VFIO + framework. + + If you don't know what to do here, say N. diff --git a/drivers/vfio/pci/Makefile b/drivers/vfio/pci/Makefile index a0df9c2a4bd9..d1de3e81921f 100644 --- a/drivers/vfio/pci/Makefile +++ b/drivers/vfio/pci/Makefile @@ -3,6 +3,7 @@ obj-$(CONFIG_VFIO_PCI_CORE) += vfio-pci-core.o obj-$(CONFIG_VFIO_PCI) += vfio-pci.o obj-$(CONFIG_MLX5_VFIO_PCI) += mlx5-vfio-pci.o +obj-$(CONFIG_HISI_ACC_VFIO_PCI) += hisi-acc-vfio-pci.o vfio-pci-core-y := vfio_pci_core.o vfio_pci_intrs.o vfio_pci_rdwr.o vfio_pci_config.o vfio-pci-core-$(CONFIG_S390) += vfio_pci_zdev.o @@ -11,3 +12,4 @@ vfio-pci-y := vfio_pci.o vfio-pci-$(CONFIG_VFIO_PCI_IGD) += vfio_pci_igd.o mlx5-vfio-pci-y := mlx5_vfio_pci.o +hisi-acc-vfio-pci-y := 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..a9e173098ab5 --- /dev/null +++ b/drivers/vfio/pci/hisi_acc_vfio_pci.c @@ -0,0 +1,100 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2021, HiSilicon Ltd. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +static int hisi_acc_vfio_pci_open(struct vfio_device *core_vdev) +{ + struct vfio_pci_core_device *vdev = + container_of(core_vdev, struct vfio_pci_core_device, vdev); + int ret; + + lockdep_assert_held(&core_vdev->reflck->lock); + + 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 = hisi_acc_vfio_pci_open, + .release = vfio_pci_core_release, + .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, + .reflck_attach = vfio_pci_core_reflck_attach, +}; + +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; + + ret = vfio_pci_core_register_device(vdev, pdev, &hisi_acc_vfio_pci_ops); + if (ret) + goto out_free; + + dev_set_drvdata(&pdev->dev, vdev); + + return 0; + +out_free: + 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); + kfree(vdev); +} + +static const struct pci_device_id hisi_acc_vfio_pci_table[] = { + { PCI_DRIVER_OVERRIDE_DEVICE_VFIO(PCI_VENDOR_ID_HUAWEI, 0xa256) }, /* SEC VF */ + { PCI_DRIVER_OVERRIDE_DEVICE_VFIO(PCI_VENDOR_ID_HUAWEI, 0xa259) }, /* HPRE VF */ + { PCI_DRIVER_OVERRIDE_DEVICE_VFIO(PCI_VENDOR_ID_HUAWEI, 0xa251) }, /* ZIP VF */ + { 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, +#ifdef CONFIG_PCI_IOV + .sriov_configure = vfio_pci_core_sriov_configure, +#endif + .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");