diff options
Diffstat (limited to 'qemu/hw/scsi/vhost-scsi.c')
| -rw-r--r-- | qemu/hw/scsi/vhost-scsi.c | 352 |
1 files changed, 0 insertions, 352 deletions
diff --git a/qemu/hw/scsi/vhost-scsi.c b/qemu/hw/scsi/vhost-scsi.c deleted file mode 100644 index 9261d51da..000000000 --- a/qemu/hw/scsi/vhost-scsi.c +++ /dev/null @@ -1,352 +0,0 @@ -/* - * vhost_scsi host device - * - * Copyright IBM, Corp. 2011 - * - * Authors: - * Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> - * - * Changes for QEMU mainline + tcm_vhost kernel upstream: - * 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 <sys/ioctl.h> -#include "qemu/error-report.h" -#include "qemu/queue.h" -#include "monitor/monitor.h" -#include "migration/migration.h" -#include "hw/virtio/vhost-scsi.h" -#include "hw/virtio/vhost.h" -#include "hw/virtio/virtio-scsi.h" -#include "hw/virtio/virtio-bus.h" -#include "hw/virtio/virtio-access.h" -#include "hw/fw-path-provider.h" -#include "linux/vhost.h" -#include "qemu/cutils.h" - -/* Features supported by host kernel. */ -static const int kernel_feature_bits[] = { - VIRTIO_F_NOTIFY_ON_EMPTY, - VIRTIO_RING_F_INDIRECT_DESC, - VIRTIO_RING_F_EVENT_IDX, - VIRTIO_SCSI_F_HOTPLUG, - VHOST_INVALID_FEATURE_BIT -}; - -static int vhost_scsi_set_endpoint(VHostSCSI *s) -{ - VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s); - const VhostOps *vhost_ops = s->dev.vhost_ops; - struct vhost_scsi_target backend; - int ret; - - memset(&backend, 0, sizeof(backend)); - pstrcpy(backend.vhost_wwpn, sizeof(backend.vhost_wwpn), vs->conf.wwpn); - ret = vhost_ops->vhost_scsi_set_endpoint(&s->dev, &backend); - if (ret < 0) { - return -errno; - } - return 0; -} - -static void vhost_scsi_clear_endpoint(VHostSCSI *s) -{ - VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s); - struct vhost_scsi_target backend; - const VhostOps *vhost_ops = s->dev.vhost_ops; - - memset(&backend, 0, sizeof(backend)); - pstrcpy(backend.vhost_wwpn, sizeof(backend.vhost_wwpn), vs->conf.wwpn); - vhost_ops->vhost_scsi_clear_endpoint(&s->dev, &backend); -} - -static int vhost_scsi_start(VHostSCSI *s) -{ - int ret, abi_version, i; - VirtIODevice *vdev = VIRTIO_DEVICE(s); - BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev))); - VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus); - const VhostOps *vhost_ops = s->dev.vhost_ops; - - if (!k->set_guest_notifiers) { - error_report("binding does not support guest notifiers"); - return -ENOSYS; - } - - ret = vhost_ops->vhost_scsi_get_abi_version(&s->dev, &abi_version); - if (ret < 0) { - return -errno; - } - if (abi_version > VHOST_SCSI_ABI_VERSION) { - error_report("vhost-scsi: The running tcm_vhost kernel abi_version:" - " %d is greater than vhost_scsi userspace supports: %d, please" - " upgrade your version of QEMU", abi_version, - VHOST_SCSI_ABI_VERSION); - return -ENOSYS; - } - - ret = vhost_dev_enable_notifiers(&s->dev, vdev); - if (ret < 0) { - return ret; - } - - s->dev.acked_features = vdev->guest_features; - ret = vhost_dev_start(&s->dev, vdev); - if (ret < 0) { - error_report("Error start vhost dev"); - goto err_notifiers; - } - - ret = vhost_scsi_set_endpoint(s); - if (ret < 0) { - error_report("Error set vhost-scsi endpoint"); - goto err_vhost_stop; - } - - ret = k->set_guest_notifiers(qbus->parent, s->dev.nvqs, true); - if (ret < 0) { - error_report("Error binding guest notifier"); - goto err_endpoint; - } - - /* 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, s->dev.vq_index + i, false); - } - - return ret; - -err_endpoint: - vhost_scsi_clear_endpoint(s); -err_vhost_stop: - vhost_dev_stop(&s->dev, vdev); -err_notifiers: - vhost_dev_disable_notifiers(&s->dev, vdev); - return ret; -} - -static void vhost_scsi_stop(VHostSCSI *s) -{ - VirtIODevice *vdev = VIRTIO_DEVICE(s); - BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev))); - VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus); - int ret = 0; - - if (k->set_guest_notifiers) { - ret = k->set_guest_notifiers(qbus->parent, s->dev.nvqs, false); - if (ret < 0) { - error_report("vhost guest notifier cleanup failed: %d", ret); - } - } - assert(ret >= 0); - - vhost_scsi_clear_endpoint(s); - vhost_dev_stop(&s->dev, vdev); - vhost_dev_disable_notifiers(&s->dev, vdev); -} - -static uint64_t vhost_scsi_get_features(VirtIODevice *vdev, - uint64_t features, - Error **errp) -{ - VHostSCSI *s = VHOST_SCSI(vdev); - - return vhost_get_features(&s->dev, kernel_feature_bits, features); -} - -static void vhost_scsi_set_config(VirtIODevice *vdev, - const uint8_t *config) -{ - VirtIOSCSIConfig *scsiconf = (VirtIOSCSIConfig *)config; - VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); - - if ((uint32_t) virtio_ldl_p(vdev, &scsiconf->sense_size) != vs->sense_size || - (uint32_t) virtio_ldl_p(vdev, &scsiconf->cdb_size) != vs->cdb_size) { - error_report("vhost-scsi does not support changing the sense data and CDB sizes"); - exit(1); - } -} - -static void vhost_scsi_set_status(VirtIODevice *vdev, uint8_t val) -{ - VHostSCSI *s = (VHostSCSI *)vdev; - bool start = (val & VIRTIO_CONFIG_S_DRIVER_OK); - - if (s->dev.started == start) { - return; - } - - if (start) { - int ret; - - ret = vhost_scsi_start(s); - if (ret < 0) { - error_report("virtio-scsi: unable to start vhost: %s", - strerror(-ret)); - - /* There is no userspace virtio-scsi fallback so exit */ - exit(1); - } - } else { - vhost_scsi_stop(s); - } -} - -static void vhost_dummy_handle_output(VirtIODevice *vdev, VirtQueue *vq) -{ -} - -static void vhost_scsi_realize(DeviceState *dev, Error **errp) -{ - VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(dev); - VHostSCSI *s = VHOST_SCSI(dev); - Error *err = NULL; - int vhostfd = -1; - int ret; - - if (!vs->conf.wwpn) { - error_setg(errp, "vhost-scsi: missing wwpn"); - return; - } - - if (vs->conf.vhostfd) { - vhostfd = monitor_fd_param(cur_mon, vs->conf.vhostfd, errp); - if (vhostfd == -1) { - error_prepend(errp, "vhost-scsi: unable to parse vhostfd: "); - return; - } - } else { - vhostfd = open("/dev/vhost-scsi", O_RDWR); - if (vhostfd < 0) { - error_setg(errp, "vhost-scsi: open vhost char device failed: %s", - strerror(errno)); - return; - } - } - - virtio_scsi_common_realize(dev, &err, vhost_dummy_handle_output, - vhost_dummy_handle_output, - vhost_dummy_handle_output); - if (err != NULL) { - error_propagate(errp, err); - close(vhostfd); - return; - } - - s->dev.nvqs = VHOST_SCSI_VQ_NUM_FIXED + vs->conf.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, (void *)(uintptr_t)vhostfd, - VHOST_BACKEND_TYPE_KERNEL); - if (ret < 0) { - error_setg(errp, "vhost-scsi: vhost initialization failed: %s", - strerror(-ret)); - return; - } - - /* At present, channel and lun both are 0 for bootable vhost-scsi disk */ - s->channel = 0; - s->lun = 0; - /* Note: we can also get the minimum tpgt from kernel */ - s->target = vs->conf.boot_tpgt; - - error_setg(&s->migration_blocker, - "vhost-scsi does not support migration"); - migrate_add_blocker(s->migration_blocker); -} - -static void vhost_scsi_unrealize(DeviceState *dev, Error **errp) -{ - VirtIODevice *vdev = VIRTIO_DEVICE(dev); - VHostSCSI *s = VHOST_SCSI(dev); - - migrate_del_blocker(s->migration_blocker); - error_free(s->migration_blocker); - - /* This will stop vhost backend. */ - vhost_scsi_set_status(vdev, 0); - - vhost_dev_cleanup(&s->dev); - g_free(s->dev.vqs); - - virtio_scsi_common_unrealize(dev, errp); -} - -/* - * Implementation of an interface to adjust firmware path - * for the bootindex property handling. - */ -static char *vhost_scsi_get_fw_dev_path(FWPathProvider *p, BusState *bus, - DeviceState *dev) -{ - VHostSCSI *s = VHOST_SCSI(dev); - /* format: channel@channel/vhost-scsi@target,lun */ - return g_strdup_printf("/channel@%x/%s@%x,%x", s->channel, - qdev_fw_name(dev), s->target, s->lun); -} - -static Property vhost_scsi_properties[] = { - DEFINE_PROP_STRING("vhostfd", VHostSCSI, parent_obj.conf.vhostfd), - DEFINE_PROP_STRING("wwpn", VHostSCSI, parent_obj.conf.wwpn), - DEFINE_PROP_UINT32("boot_tpgt", VHostSCSI, parent_obj.conf.boot_tpgt, 0), - DEFINE_PROP_UINT32("num_queues", VHostSCSI, parent_obj.conf.num_queues, 1), - DEFINE_PROP_UINT32("max_sectors", VHostSCSI, parent_obj.conf.max_sectors, - 0xFFFF), - DEFINE_PROP_UINT32("cmd_per_lun", VHostSCSI, parent_obj.conf.cmd_per_lun, - 128), - DEFINE_PROP_END_OF_LIST(), -}; - -static void vhost_scsi_class_init(ObjectClass *klass, void *data) -{ - DeviceClass *dc = DEVICE_CLASS(klass); - VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); - FWPathProviderClass *fwc = FW_PATH_PROVIDER_CLASS(klass); - - dc->props = vhost_scsi_properties; - set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); - vdc->realize = vhost_scsi_realize; - vdc->unrealize = vhost_scsi_unrealize; - vdc->get_features = vhost_scsi_get_features; - vdc->set_config = vhost_scsi_set_config; - vdc->set_status = vhost_scsi_set_status; - fwc->get_dev_path = vhost_scsi_get_fw_dev_path; -} - -static void vhost_scsi_instance_init(Object *obj) -{ - VHostSCSI *dev = VHOST_SCSI(obj); - - device_add_bootindex_property(obj, &dev->bootindex, "bootindex", NULL, - DEVICE(dev), NULL); -} - -static const TypeInfo vhost_scsi_info = { - .name = TYPE_VHOST_SCSI, - .parent = TYPE_VIRTIO_SCSI_COMMON, - .instance_size = sizeof(VHostSCSI), - .class_init = vhost_scsi_class_init, - .instance_init = vhost_scsi_instance_init, - .interfaces = (InterfaceInfo[]) { - { TYPE_FW_PATH_PROVIDER }, - { } - }, -}; - -static void virtio_register_types(void) -{ - type_register_static(&vhost_scsi_info); -} - -type_init(virtio_register_types) |