diff options
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/block/Makefile.objs | 3 | ||||
| -rw-r--r-- | hw/block/vhost-user-blk.c | 359 | ||||
| -rw-r--r-- | hw/virtio/virtio-pci.c | 55 | ||||
| -rw-r--r-- | hw/virtio/virtio-pci.h | 18 |
4 files changed, 435 insertions, 0 deletions
diff --git a/hw/block/Makefile.objs b/hw/block/Makefile.objs index e0ed980..4c19a58 100644 --- a/hw/block/Makefile.objs +++ b/hw/block/Makefile.objs @@ -13,3 +13,6 @@ obj-$(CONFIG_SH4) += tc58128.o obj-$(CONFIG_VIRTIO) += virtio-blk.o obj-$(CONFIG_VIRTIO) += dataplane/ +ifeq ($(CONFIG_VIRTIO),y) +obj-$(CONFIG_VHOST_USER_BLK) += vhost-user-blk.o +endif diff --git a/hw/block/vhost-user-blk.c b/hw/block/vhost-user-blk.c new file mode 100644 index 0000000..b53b4c9 --- /dev/null +++ b/hw/block/vhost-user-blk.c @@ -0,0 +1,359 @@ +/* + * vhost-user-blk host device + * + * Copyright(C) 2017 Intel Corporation. + * + * Authors: + * Changpeng Liu <changpeng.liu@intel.com> + * + * Largely based on the "vhost-user-scsi.c" and "vhost-scsi.c" implemented by: + * Felipe Franciosi <felipe@nutanix.com> + * Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> + * Nicholas Bellinger <nab@risingtidesystems.com> + * + * This work is licensed under the terms of the GNU LGPL, version 2 or later. + * See the COPYING.LIB file in the top-level directory. + * + */ + +#include "qemu/osdep.h" +#include "qapi/error.h" +#include "qemu/error-report.h" +#include "qemu/typedefs.h" +#include "qemu/cutils.h" +#include "qom/object.h" +#include "hw/qdev-core.h" +#include "hw/virtio/vhost.h" +#include "hw/virtio/vhost-user-blk.h" +#include "hw/virtio/virtio.h" +#include "hw/virtio/virtio-bus.h" +#include "hw/virtio/virtio-access.h" + +static const int user_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_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_user_blk_update_config(VirtIODevice *vdev, uint8_t *config) +{ + VHostUserBlk *s = VHOST_USER_BLK(vdev); + + memcpy(config, &s->blkcfg, sizeof(struct virtio_blk_config)); +} + +static void vhost_user_blk_set_config(VirtIODevice *vdev, const uint8_t *config) +{ + VHostUserBlk *s = VHOST_USER_BLK(vdev); + struct virtio_blk_config *blkcfg = (struct virtio_blk_config *)config; + int ret; + + if (blkcfg->wce == s->blkcfg.wce) { + return; + } + + ret = vhost_dev_set_config(&s->dev, &blkcfg->wce, + offsetof(struct virtio_blk_config, wce), + sizeof(blkcfg->wce), + VHOST_SET_CONFIG_TYPE_MASTER); + if (ret) { + error_report("set device config space failed"); + return; + } + + s->blkcfg.wce = blkcfg->wce; +} + +static int vhost_user_blk_handle_config_change(struct vhost_dev *dev) +{ + int ret; + struct virtio_blk_config blkcfg; + VHostUserBlk *s = VHOST_USER_BLK(dev->vdev); + + ret = vhost_dev_get_config(dev, (uint8_t *)&blkcfg, + sizeof(struct virtio_blk_config)); + if (ret < 0) { + error_report("get config space failed"); + return -1; + } + + /* valid for resize only */ + if (blkcfg.capacity != s->blkcfg.capacity) { + s->blkcfg.capacity = blkcfg.capacity; + memcpy(dev->vdev->config, &s->blkcfg, sizeof(struct virtio_blk_config)); + virtio_notify_config(dev->vdev); + } + + return 0; +} + +const VhostDevConfigOps blk_ops = { + .vhost_dev_config_notifier = vhost_user_blk_handle_config_change, +}; + +static void vhost_user_blk_start(VirtIODevice *vdev) +{ + VHostUserBlk *s = VHOST_USER_BLK(vdev); + BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev))); + VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus); + int i, ret; + + if (!k->set_guest_notifiers) { + error_report("binding does not support guest notifiers"); + return; + } + + ret = vhost_dev_enable_notifiers(&s->dev, vdev); + if (ret < 0) { + error_report("Error enabling host notifiers: %d", -ret); + return; + } + + ret = k->set_guest_notifiers(qbus->parent, s->dev.nvqs, true); + if (ret < 0) { + error_report("Error binding guest notifier: %d", -ret); + goto err_host_notifiers; + } + + s->dev.acked_features = vdev->guest_features; + ret = vhost_dev_start(&s->dev, vdev); + if (ret < 0) { + error_report("Error starting vhost: %d", -ret); + goto err_guest_notifiers; + } + + /* guest_notifier_mask/pending not used yet, so just unmask + * everything here. virtio-pci will do the right thing by + * enabling/disabling irqfd. + */ + for (i = 0; i < s->dev.nvqs; i++) { + vhost_virtqueue_mask(&s->dev, vdev, i, false); + } + + return; + +err_guest_notifiers: + k->set_guest_notifiers(qbus->parent, s->dev.nvqs, false); +err_host_notifiers: + vhost_dev_disable_notifiers(&s->dev, vdev); +} + +static void vhost_user_blk_stop(VirtIODevice *vdev) +{ + VHostUserBlk *s = VHOST_USER_BLK(vdev); + BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev))); + VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus); + int ret; + + if (!k->set_guest_notifiers) { + return; + } + + vhost_dev_stop(&s->dev, vdev); + + ret = k->set_guest_notifiers(qbus->parent, s->dev.nvqs, false); + if (ret < 0) { + error_report("vhost guest notifier cleanup failed: %d", ret); + return; + } + + vhost_dev_disable_notifiers(&s->dev, vdev); +} + +static void vhost_user_blk_set_status(VirtIODevice *vdev, uint8_t status) +{ + VHostUserBlk *s = VHOST_USER_BLK(vdev); + bool should_start = status & VIRTIO_CONFIG_S_DRIVER_OK; + + if (!vdev->vm_running) { + should_start = false; + } + + if (s->dev.started == should_start) { + return; + } + + if (should_start) { + vhost_user_blk_start(vdev); + } else { + vhost_user_blk_stop(vdev); + } + +} + +static uint64_t vhost_user_blk_get_features(VirtIODevice *vdev, + uint64_t features, + Error **errp) +{ + VHostUserBlk *s = VHOST_USER_BLK(vdev); + uint64_t get_features; + + /* Turn on pre-defined features */ + virtio_add_feature(&features, VIRTIO_BLK_F_SEG_MAX); + virtio_add_feature(&features, VIRTIO_BLK_F_GEOMETRY); + virtio_add_feature(&features, VIRTIO_BLK_F_TOPOLOGY); + virtio_add_feature(&features, VIRTIO_BLK_F_BLK_SIZE); + virtio_add_feature(&features, VIRTIO_BLK_F_FLUSH); + + if (s->config_wce) { + virtio_add_feature(&features, VIRTIO_BLK_F_CONFIG_WCE); + } + if (s->config_ro) { + virtio_add_feature(&features, VIRTIO_BLK_F_RO); + } + if (s->num_queues > 1) { + virtio_add_feature(&features, VIRTIO_BLK_F_MQ); + } + + get_features = vhost_get_features(&s->dev, user_feature_bits, features); + + return get_features; +} + +static void vhost_user_blk_handle_output(VirtIODevice *vdev, VirtQueue *vq) +{ + +} + +static void vhost_user_blk_device_realize(DeviceState *dev, Error **errp) +{ + VirtIODevice *vdev = VIRTIO_DEVICE(dev); + VHostUserBlk *s = VHOST_USER_BLK(vdev); + int i, ret; + + if (!s->chardev.chr) { + error_setg(errp, "vhost-user-blk: chardev is mandatory"); + return; + } + + if (!s->num_queues || s->num_queues > VIRTIO_QUEUE_MAX) { + error_setg(errp, "vhost-user-blk: invalid number of IO queues"); + return; + } + + if (!s->queue_size) { + error_setg(errp, "vhost-user-blk: queue size must be non-zero"); + return; + } + + virtio_init(vdev, "virtio-blk", VIRTIO_ID_BLOCK, + sizeof(struct virtio_blk_config)); + + for (i = 0; i < s->num_queues; i++) { + virtio_add_queue(vdev, s->queue_size, + vhost_user_blk_handle_output); + } + + s->dev.nvqs = s->num_queues; + s->dev.vqs = g_new(struct vhost_virtqueue, s->dev.nvqs); + s->dev.vq_index = 0; + s->dev.backend_features = 0; + + ret = vhost_dev_init(&s->dev, &s->chardev, VHOST_BACKEND_TYPE_USER, 0); + if (ret < 0) { + error_setg(errp, "vhost-user-blk: vhost initialization failed: %s", + strerror(-ret)); + goto virtio_err; + } + + ret = vhost_dev_get_config(&s->dev, (uint8_t *)&s->blkcfg, + sizeof(struct virtio_blk_config)); + if (ret < 0) { + error_setg(errp, "vhost-user-blk: get block config failed"); + goto vhost_err; + } + + if (s->blkcfg.num_queues != s->num_queues) { + s->blkcfg.num_queues = s->num_queues; + } + + vhost_dev_set_config_notifier(&s->dev, &blk_ops); + + return; + +vhost_err: + vhost_dev_cleanup(&s->dev); +virtio_err: + g_free(s->dev.vqs); + virtio_cleanup(vdev); +} + +static void vhost_user_blk_device_unrealize(DeviceState *dev, Error **errp) +{ + VirtIODevice *vdev = VIRTIO_DEVICE(dev); + VHostUserBlk *s = VHOST_USER_BLK(dev); + + vhost_user_blk_set_status(vdev, 0); + vhost_dev_cleanup(&s->dev); + g_free(s->dev.vqs); + virtio_cleanup(vdev); +} + +static void vhost_user_blk_instance_init(Object *obj) +{ + VHostUserBlk *s = VHOST_USER_BLK(obj); + + device_add_bootindex_property(obj, &s->bootindex, "bootindex", + "/disk@0,0", DEVICE(obj), NULL); +} + +static const VMStateDescription vmstate_vhost_user_blk = { + .name = "vhost-user-blk", + .minimum_version_id = 1, + .version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_VIRTIO_DEVICE, + VMSTATE_END_OF_LIST() + }, +}; + +static Property vhost_user_blk_properties[] = { + DEFINE_PROP_CHR("chardev", VHostUserBlk, chardev), + DEFINE_PROP_UINT16("num-queues", VHostUserBlk, num_queues, 1), + DEFINE_PROP_UINT32("queue-size", VHostUserBlk, queue_size, 128), + DEFINE_PROP_BIT("config-wce", VHostUserBlk, config_wce, 0, true), + DEFINE_PROP_BIT("config-ro", VHostUserBlk, config_ro, 0, false), + DEFINE_PROP_END_OF_LIST(), +}; + +static void vhost_user_blk_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); + + dc->props = vhost_user_blk_properties; + dc->vmsd = &vmstate_vhost_user_blk; + set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); + vdc->realize = vhost_user_blk_device_realize; + vdc->unrealize = vhost_user_blk_device_unrealize; + vdc->get_config = vhost_user_blk_update_config; + vdc->set_config = vhost_user_blk_set_config; + vdc->get_features = vhost_user_blk_get_features; + vdc->set_status = vhost_user_blk_set_status; +} + +static const TypeInfo vhost_user_blk_info = { + .name = TYPE_VHOST_USER_BLK, + .parent = TYPE_VIRTIO_DEVICE, + .instance_size = sizeof(VHostUserBlk), + .instance_init = vhost_user_blk_instance_init, + .class_init = vhost_user_blk_class_init, +}; + +static void virtio_register_types(void) +{ + type_register_static(&vhost_user_blk_info); +} + +type_init(virtio_register_types) diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index 6c75cca..9ae10f0 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -1978,6 +1978,58 @@ static const TypeInfo virtio_blk_pci_info = { .class_init = virtio_blk_pci_class_init, }; +#if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX) +/* vhost-user-blk */ + +static Property vhost_user_blk_pci_properties[] = { + DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0), + DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), + DEFINE_PROP_END_OF_LIST(), +}; + +static void vhost_user_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) +{ + VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(vpci_dev); + DeviceState *vdev = DEVICE(&dev->vdev); + + qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); + object_property_set_bool(OBJECT(vdev), true, "realized", errp); +} + +static void vhost_user_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); + dc->props = vhost_user_blk_pci_properties; + k->realize = vhost_user_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_user_blk_pci_instance_init(Object *obj) +{ + VHostUserBlkPCI *dev = VHOST_USER_BLK_PCI(obj); + + virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), + TYPE_VHOST_USER_BLK); + object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev), + "bootindex", &error_abort); +} + +static const TypeInfo vhost_user_blk_pci_info = { + .name = TYPE_VHOST_USER_BLK_PCI, + .parent = TYPE_VIRTIO_PCI, + .instance_size = sizeof(VHostUserBlkPCI), + .instance_init = vhost_user_blk_pci_instance_init, + .class_init = vhost_user_blk_pci_class_init, +}; +#endif + /* virtio-scsi-pci */ static Property virtio_scsi_pci_properties[] = { @@ -2624,6 +2676,9 @@ static void virtio_pci_register_types(void) type_register_static(&virtio_9p_pci_info); #endif type_register_static(&virtio_blk_pci_info); +#if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX) + type_register_static(&vhost_user_blk_pci_info); +#endif type_register_static(&virtio_scsi_pci_info); type_register_static(&virtio_balloon_pci_info); type_register_static(&virtio_serial_pci_info); diff --git a/hw/virtio/virtio-pci.h b/hw/virtio/virtio-pci.h index 12d3a90..813082b 100644 --- a/hw/virtio/virtio-pci.h +++ b/hw/virtio/virtio-pci.h @@ -27,6 +27,9 @@ #include "hw/virtio/virtio-gpu.h" #include "hw/virtio/virtio-crypto.h" #include "hw/virtio/vhost-user-scsi.h" +#if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX) +#include "hw/virtio/vhost-user-blk.h" +#endif #ifdef CONFIG_VIRTFS #include "hw/9pfs/virtio-9p.h" @@ -46,6 +49,7 @@ typedef struct VirtIOSerialPCI VirtIOSerialPCI; typedef struct VirtIONetPCI VirtIONetPCI; typedef struct VHostSCSIPCI VHostSCSIPCI; typedef struct VHostUserSCSIPCI VHostUserSCSIPCI; +typedef struct VHostUserBlkPCI VHostUserBlkPCI; typedef struct VirtIORngPCI VirtIORngPCI; typedef struct VirtIOInputPCI VirtIOInputPCI; typedef struct VirtIOInputHIDPCI VirtIOInputHIDPCI; @@ -244,6 +248,20 @@ struct VHostUserSCSIPCI { VHostUserSCSI vdev; }; +#if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX) +/* + * vhost-user-blk-pci: This extends VirtioPCIProxy. + */ +#define TYPE_VHOST_USER_BLK_PCI "vhost-user-blk-pci" +#define VHOST_USER_BLK_PCI(obj) \ + OBJECT_CHECK(VHostUserBlkPCI, (obj), TYPE_VHOST_USER_BLK_PCI) + +struct VHostUserBlkPCI { + VirtIOPCIProxy parent_obj; + VHostUserBlk vdev; +}; +#endif + /* * virtio-blk-pci: This extends VirtioPCIProxy. */ |