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Thu, 08 Apr 2021 03:13:31 -0700 (PDT) From: Xie Yongji To: mst@redhat.com, stefanha@redhat.com, sgarzare@redhat.com, raphael.norwitz@nutanix.com, lingshan.zhu@intel.com, changpeng.liu@intel.com, jasowang@redhat.com, kwolf@redhat.com, mreitz@redhat.com Subject: [PATCH 3/3] vhost-vdpa-blk: Introduce vhost-vdpa-blk host device Date: Thu, 8 Apr 2021 18:12:52 +0800 Message-Id: <20210408101252.552-4-xieyongji@bytedance.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210408101252.552-1-xieyongji@bytedance.com> References: <20210408101252.552-1-xieyongji@bytedance.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::62f; envelope-from=xieyongji@bytedance.com; helo=mail-pl1-x62f.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" This commit introduces a new vhost-vdpa block device, which will set up a vDPA device specified by a "vdpa-dev" parameter, something like: qemu-system-x86_64 \ -device vhost-vdpa-blk-pci,vdpa-dev=/dev/vhost-vdpa-0 Signed-off-by: Xie Yongji --- hw/block/Kconfig | 5 + hw/block/meson.build | 1 + hw/block/vhost-vdpa-blk.c | 227 +++++++++++++++++++++++++++++ hw/virtio/meson.build | 1 + hw/virtio/vhost-vdpa-blk-pci.c | 101 +++++++++++++ include/hw/virtio/vhost-vdpa-blk.h | 30 ++++ 6 files changed, 365 insertions(+) create mode 100644 hw/block/vhost-vdpa-blk.c create mode 100644 hw/virtio/vhost-vdpa-blk-pci.c create mode 100644 include/hw/virtio/vhost-vdpa-blk.h diff --git a/hw/block/Kconfig b/hw/block/Kconfig index 4fcd152166..4615a2c116 100644 --- a/hw/block/Kconfig +++ b/hw/block/Kconfig @@ -41,5 +41,10 @@ config VHOST_USER_BLK default y if VIRTIO_PCI depends on VIRTIO && VHOST_USER && LINUX +config VHOST_VDPA_BLK + bool + default y if VIRTIO_PCI + depends on VIRTIO && VHOST_VDPA && LINUX + config SWIM bool diff --git a/hw/block/meson.build b/hw/block/meson.build index 5862bda4cb..98f1fc330a 100644 --- a/hw/block/meson.build +++ b/hw/block/meson.build @@ -17,5 +17,6 @@ softmmu_ss.add(when: 'CONFIG_NVME_PCI', if_true: files('nvme.c', 'nvme-ns.c', 'n specific_ss.add(when: 'CONFIG_VIRTIO_BLK', if_true: files('virtio-blk.c')) specific_ss.add(when: 'CONFIG_VHOST_USER_BLK', if_true: files('vhost-blk-common.c', 'vhost-user-blk.c')) +specific_ss.add(when: 'CONFIG_VHOST_VDPA_BLK', if_true: files('vhost-blk-common.c', 'vhost-vdpa-blk.c')) subdir('dataplane') diff --git a/hw/block/vhost-vdpa-blk.c b/hw/block/vhost-vdpa-blk.c new file mode 100644 index 0000000000..d5cbbbba10 --- /dev/null +++ b/hw/block/vhost-vdpa-blk.c @@ -0,0 +1,227 @@ +/* + * vhost-vdpa-blk host device + * + * Copyright (C) 2021 Bytedance Inc. and/or its affiliates. All rights reserved. + * + * Author: + * Xie Yongji + * + * This work is licensed under the terms of the GNU GPL, version 2. See + * the COPYING file in the top-level directory. + * + */ + +#include "qemu/osdep.h" +#include "qapi/error.h" +#include "qemu/error-report.h" +#include "qemu/cutils.h" +#include "hw/qdev-core.h" +#include "hw/qdev-properties.h" +#include "hw/qdev-properties-system.h" +#include "hw/virtio/vhost.h" +#include "hw/virtio/vhost-vdpa-blk.h" +#include "hw/virtio/virtio.h" +#include "hw/virtio/virtio-bus.h" +#include "hw/virtio/virtio-access.h" +#include "sysemu/sysemu.h" +#include "sysemu/runstate.h" + +static const int vdpa_feature_bits[] = { + VIRTIO_BLK_F_SIZE_MAX, + VIRTIO_BLK_F_SEG_MAX, + VIRTIO_BLK_F_GEOMETRY, + VIRTIO_BLK_F_BLK_SIZE, + VIRTIO_BLK_F_TOPOLOGY, + VIRTIO_BLK_F_MQ, + VIRTIO_BLK_F_RO, + VIRTIO_BLK_F_FLUSH, + VIRTIO_BLK_F_CONFIG_WCE, + VIRTIO_BLK_F_DISCARD, + VIRTIO_BLK_F_WRITE_ZEROES, + VIRTIO_F_VERSION_1, + VIRTIO_RING_F_INDIRECT_DESC, + VIRTIO_RING_F_EVENT_IDX, + VIRTIO_F_NOTIFY_ON_EMPTY, + VHOST_INVALID_FEATURE_BIT +}; + +static void vhost_vdpa_blk_set_status(VirtIODevice *vdev, uint8_t status) +{ + VHostVdpaBlk *s = VHOST_VDPA_BLK(vdev); + VHostBlkCommon *vbc = VHOST_BLK_COMMON(s); + bool should_start = virtio_device_started(vdev, status); + int ret; + + if (!vdev->vm_running) { + should_start = false; + } + + if (vbc->dev.started == should_start) { + return; + } + + if (should_start) { + ret = vhost_blk_common_start(vbc); + if (ret < 0) { + error_report("vhost-vdpa-blk: vhost start failed: %s", + strerror(-ret)); + } + } else { + vhost_blk_common_stop(vbc); + } + +} + +static void vhost_vdpa_blk_handle_output(VirtIODevice *vdev, VirtQueue *vq) +{ + VHostVdpaBlk *s = VHOST_VDPA_BLK(vdev); + VHostBlkCommon *vbc = VHOST_BLK_COMMON(s); + int i, ret; + + if (!vdev->start_on_kick) { + return; + } + + if (vbc->dev.started) { + return; + } + + ret = vhost_blk_common_start(vbc); + if (ret < 0) { + error_report("vhost-vdpa-blk: vhost start failed: %s", + strerror(-ret)); + return; + } + + /* Kick right away to begin processing requests already in vring */ + for (i = 0; i < vbc->dev.nvqs; i++) { + VirtQueue *kick_vq = virtio_get_queue(vdev, i); + + if (!virtio_queue_get_desc_addr(vdev, i)) { + continue; + } + event_notifier_set(virtio_queue_get_host_notifier(kick_vq)); + } +} + +static void vhost_vdpa_blk_device_realize(DeviceState *dev, Error **errp) +{ + VirtIODevice *vdev = VIRTIO_DEVICE(dev); + VHostVdpaBlk *s = VHOST_VDPA_BLK(vdev); + VHostBlkCommon *vbc = VHOST_BLK_COMMON(s); + Error *err = NULL; + int ret; + + s->vdpa.device_fd = qemu_open_old(s->vdpa_dev, O_RDWR); + if (s->vdpa.device_fd == -1) { + error_setg(errp, "vhost-vdpa-blk: open %s failed: %s", + s->vdpa_dev, strerror(errno)); + return; + } + + vhost_blk_common_realize(vbc, vhost_vdpa_blk_handle_output, &err); + if (err != NULL) { + error_propagate(errp, err); + goto blk_err; + } + + vbc->vhost_vqs = g_new0(struct vhost_virtqueue, vbc->num_queues); + vbc->dev.nvqs = vbc->num_queues; + vbc->dev.vqs = vbc->vhost_vqs; + vbc->dev.vq_index = 0; + vbc->dev.backend_features = 0; + vbc->started = false; + + vhost_dev_set_config_notifier(&vbc->dev, &blk_ops); + + ret = vhost_dev_init(&vbc->dev, &s->vdpa, VHOST_BACKEND_TYPE_VDPA, 0); + if (ret < 0) { + error_setg(errp, "vhost-vdpa-blk: vhost initialization failed: %s", + strerror(-ret)); + goto init_err; + } + + ret = vhost_dev_get_config(&vbc->dev, (uint8_t *)&vbc->blkcfg, + sizeof(struct virtio_blk_config)); + if (ret < 0) { + error_setg(errp, "vhost-vdpa-blk: get block config failed"); + goto config_err; + } + + return; +config_err: + vhost_dev_cleanup(&vbc->dev); +init_err: + vhost_blk_common_unrealize(vbc); +blk_err: + close(s->vdpa.device_fd); +} + +static void vhost_vdpa_blk_device_unrealize(DeviceState *dev) +{ + VirtIODevice *vdev = VIRTIO_DEVICE(dev); + VHostVdpaBlk *s = VHOST_VDPA_BLK(dev); + VHostBlkCommon *vbc = VHOST_BLK_COMMON(s); + + virtio_set_status(vdev, 0); + vhost_dev_cleanup(&vbc->dev); + vhost_blk_common_unrealize(vbc); + close(s->vdpa.device_fd); +} + +static void vhost_vdpa_blk_instance_init(Object *obj) +{ + VHostBlkCommon *vbc = VHOST_BLK_COMMON(obj); + + vbc->feature_bits = vdpa_feature_bits; + + device_add_bootindex_property(obj, &vbc->bootindex, "bootindex", + "/disk@0,0", DEVICE(obj)); +} + +static const VMStateDescription vmstate_vhost_vdpa_blk = { + .name = "vhost-vdpa-blk", + .minimum_version_id = 1, + .version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_VIRTIO_DEVICE, + VMSTATE_END_OF_LIST() + }, +}; + +static Property vhost_vdpa_blk_properties[] = { + DEFINE_PROP_STRING("vdpa-dev", VHostVdpaBlk, vdpa_dev), + DEFINE_PROP_UINT16("num-queues", VHostBlkCommon, num_queues, + VHOST_BLK_AUTO_NUM_QUEUES), + DEFINE_PROP_UINT32("queue-size", VHostBlkCommon, queue_size, 256), + DEFINE_PROP_BIT("config-wce", VHostBlkCommon, config_wce, 0, true), + DEFINE_PROP_END_OF_LIST(), +}; + +static void vhost_vdpa_blk_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); + + device_class_set_props(dc, vhost_vdpa_blk_properties); + dc->vmsd = &vmstate_vhost_vdpa_blk; + set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); + vdc->realize = vhost_vdpa_blk_device_realize; + vdc->unrealize = vhost_vdpa_blk_device_unrealize; + vdc->set_status = vhost_vdpa_blk_set_status; +} + +static const TypeInfo vhost_vdpa_blk_info = { + .name = TYPE_VHOST_VDPA_BLK, + .parent = TYPE_VHOST_BLK_COMMON, + .instance_size = sizeof(VHostVdpaBlk), + .instance_init = vhost_vdpa_blk_instance_init, + .class_init = vhost_vdpa_blk_class_init, +}; + +static void virtio_register_types(void) +{ + type_register_static(&vhost_vdpa_blk_info); +} + +type_init(virtio_register_types) diff --git a/hw/virtio/meson.build b/hw/virtio/meson.build index fbff9bc9d4..f02bea65a2 100644 --- a/hw/virtio/meson.build +++ b/hw/virtio/meson.build @@ -30,6 +30,7 @@ virtio_pci_ss = ss.source_set() virtio_pci_ss.add(when: 'CONFIG_VHOST_VSOCK', if_true: files('vhost-vsock-pci.c')) virtio_pci_ss.add(when: 'CONFIG_VHOST_USER_VSOCK', if_true: files('vhost-user-vsock-pci.c')) virtio_pci_ss.add(when: 'CONFIG_VHOST_USER_BLK', if_true: files('vhost-user-blk-pci.c')) +virtio_pci_ss.add(when: 'CONFIG_VHOST_VDPA_BLK', if_true: files('vhost-vdpa-blk-pci.c')) virtio_pci_ss.add(when: 'CONFIG_VHOST_USER_INPUT', if_true: files('vhost-user-input-pci.c')) virtio_pci_ss.add(when: 'CONFIG_VHOST_USER_SCSI', if_true: files('vhost-user-scsi-pci.c')) virtio_pci_ss.add(when: 'CONFIG_VHOST_SCSI', if_true: files('vhost-scsi-pci.c')) diff --git a/hw/virtio/vhost-vdpa-blk-pci.c b/hw/virtio/vhost-vdpa-blk-pci.c new file mode 100644 index 0000000000..976c47fb4f --- /dev/null +++ b/hw/virtio/vhost-vdpa-blk-pci.c @@ -0,0 +1,101 @@ +/* + * vhost-vdpa-blk PCI Bindings + * + * Copyright (C) 2021 Bytedance Inc. and/or its affiliates. All rights reserved. + * + * Author: + * Xie Yongji + * + * This work is licensed under the terms of the GNU GPL, version 2. See + * the COPYING file in the top-level directory. + * + */ + +#include "qemu/osdep.h" +#include "standard-headers/linux/virtio_pci.h" +#include "hw/virtio/virtio.h" +#include "hw/virtio/vhost-vdpa-blk.h" +#include "hw/pci/pci.h" +#include "hw/qdev-properties.h" +#include "qapi/error.h" +#include "qemu/error-report.h" +#include "qemu/module.h" +#include "virtio-pci.h" +#include "qom/object.h" + +typedef struct VHostVdpaBlkPCI VHostVdpaBlkPCI; + +#define TYPE_VHOST_VDPA_BLK_PCI "vhost-vdpa-blk-pci-base" +DECLARE_INSTANCE_CHECKER(VHostVdpaBlkPCI, VHOST_VDPA_BLK_PCI, + TYPE_VHOST_VDPA_BLK_PCI) + +struct VHostVdpaBlkPCI { + VirtIOPCIProxy parent_obj; + VHostVdpaBlk vdev; +}; + +static Property vhost_vdpa_blk_pci_properties[] = { + DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0), + DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, + DEV_NVECTORS_UNSPECIFIED), + DEFINE_PROP_END_OF_LIST(), +}; + +static void vhost_vdpa_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) +{ + VHostVdpaBlkPCI *dev = VHOST_VDPA_BLK_PCI(vpci_dev); + DeviceState *vdev = DEVICE(&dev->vdev); + VHostBlkCommon *vbc = VHOST_BLK_COMMON(&dev->vdev); + + if (vbc->num_queues == VHOST_BLK_AUTO_NUM_QUEUES) { + vbc->num_queues = virtio_pci_optimal_num_queues(0); + } + + if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { + vpci_dev->nvectors = vbc->num_queues + 1; + } + + qdev_realize(vdev, BUS(&vpci_dev->bus), errp); +} + +static void vhost_vdpa_blk_pci_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); + PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); + + set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); + device_class_set_props(dc, vhost_vdpa_blk_pci_properties); + k->realize = vhost_vdpa_blk_pci_realize; + pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; + pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK; + pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; + pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; +} + +static void vhost_vdpa_blk_pci_instance_init(Object *obj) +{ + VHostVdpaBlkPCI *dev = VHOST_VDPA_BLK_PCI(obj); + + virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), + TYPE_VHOST_VDPA_BLK); + object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), + "bootindex"); +} + +static const VirtioPCIDeviceTypeInfo vhost_vdpa_blk_pci_info = { + .base_name = TYPE_VHOST_VDPA_BLK_PCI, + .generic_name = "vhost-vdpa-blk-pci", + .transitional_name = "vhost-vdpa-blk-pci-transitional", + .non_transitional_name = "vhost-vdpa-blk-pci-non-transitional", + .instance_size = sizeof(VHostVdpaBlkPCI), + .instance_init = vhost_vdpa_blk_pci_instance_init, + .class_init = vhost_vdpa_blk_pci_class_init, +}; + +static void vhost_vdpa_blk_pci_register(void) +{ + virtio_pci_types_register(&vhost_vdpa_blk_pci_info); +} + +type_init(vhost_vdpa_blk_pci_register) diff --git a/include/hw/virtio/vhost-vdpa-blk.h b/include/hw/virtio/vhost-vdpa-blk.h new file mode 100644 index 0000000000..80712f6dae --- /dev/null +++ b/include/hw/virtio/vhost-vdpa-blk.h @@ -0,0 +1,30 @@ +/* + * vhost-vdpa-blk host device + * + * Copyright (C) 2021 Bytedance Inc. and/or its affiliates. All rights reserved. + * + * Author: + * Xie Yongji + * + * This work is licensed under the terms of the GNU GPL, version 2. See + * the COPYING file in the top-level directory. + * + */ + +#ifndef VHOST_VDPA_BLK_H +#define VHOST_VDPA_BLK_H + +#include "hw/virtio/vhost-vdpa.h" +#include "hw/virtio/vhost-blk-common.h" +#include "qom/object.h" + +#define TYPE_VHOST_VDPA_BLK "vhost-vdpa-blk" +OBJECT_DECLARE_SIMPLE_TYPE(VHostVdpaBlk, VHOST_VDPA_BLK) + +struct VHostVdpaBlk { + VHostBlkCommon parent_obj; + char *vdpa_dev; + struct vhost_vdpa vdpa; +}; + +#endif