11e0a84eaSCindy Lu /* 21e0a84eaSCindy Lu * vhost-vdpa.c 31e0a84eaSCindy Lu * 41e0a84eaSCindy Lu * Copyright(c) 2017-2018 Intel Corporation. 51e0a84eaSCindy Lu * Copyright(c) 2020 Red Hat, Inc. 61e0a84eaSCindy Lu * 71e0a84eaSCindy Lu * This work is licensed under the terms of the GNU GPL, version 2 or later. 81e0a84eaSCindy Lu * See the COPYING file in the top-level directory. 91e0a84eaSCindy Lu * 101e0a84eaSCindy Lu */ 111e0a84eaSCindy Lu 121e0a84eaSCindy Lu #include "qemu/osdep.h" 131e0a84eaSCindy Lu #include "clients.h" 14bd907ae4SEugenio Pérez #include "hw/virtio/virtio-net.h" 151e0a84eaSCindy Lu #include "net/vhost_net.h" 161e0a84eaSCindy Lu #include "net/vhost-vdpa.h" 171e0a84eaSCindy Lu #include "hw/virtio/vhost-vdpa.h" 181e0a84eaSCindy Lu #include "qemu/config-file.h" 191e0a84eaSCindy Lu #include "qemu/error-report.h" 20bd907ae4SEugenio Pérez #include "qemu/log.h" 21bd907ae4SEugenio Pérez #include "qemu/memalign.h" 221e0a84eaSCindy Lu #include "qemu/option.h" 231e0a84eaSCindy Lu #include "qapi/error.h" 2440237840SJason Wang #include <linux/vhost.h> 251e0a84eaSCindy Lu #include <sys/ioctl.h> 261e0a84eaSCindy Lu #include <err.h> 271e0a84eaSCindy Lu #include "standard-headers/linux/virtio_net.h" 281e0a84eaSCindy Lu #include "monitor/monitor.h" 2969498430SEugenio Pérez #include "migration/migration.h" 3069498430SEugenio Pérez #include "migration/misc.h" 311e0a84eaSCindy Lu #include "hw/virtio/vhost.h" 321e0a84eaSCindy Lu 331e0a84eaSCindy Lu /* Todo:need to add the multiqueue support here */ 341e0a84eaSCindy Lu typedef struct VhostVDPAState { 351e0a84eaSCindy Lu NetClientState nc; 361e0a84eaSCindy Lu struct vhost_vdpa vhost_vdpa; 3769498430SEugenio Pérez Notifier migration_state; 381e0a84eaSCindy Lu VHostNetState *vhost_net; 392df4dd31SEugenio Pérez 402df4dd31SEugenio Pérez /* Control commands shadow buffers */ 4117fb889fSEugenio Pérez void *cvq_cmd_out_buffer; 4217fb889fSEugenio Pérez virtio_net_ctrl_ack *status; 4317fb889fSEugenio Pérez 447f211a28SEugenio Pérez /* The device always have SVQ enabled */ 457f211a28SEugenio Pérez bool always_svq; 46152128d6SEugenio Pérez 47152128d6SEugenio Pérez /* The device can isolate CVQ in its own ASID */ 48152128d6SEugenio Pérez bool cvq_isolated; 49152128d6SEugenio Pérez 501e0a84eaSCindy Lu bool started; 511e0a84eaSCindy Lu } VhostVDPAState; 521e0a84eaSCindy Lu 531e0a84eaSCindy Lu const int vdpa_feature_bits[] = { 541e0a84eaSCindy Lu VIRTIO_F_NOTIFY_ON_EMPTY, 551e0a84eaSCindy Lu VIRTIO_RING_F_INDIRECT_DESC, 561e0a84eaSCindy Lu VIRTIO_RING_F_EVENT_IDX, 571e0a84eaSCindy Lu VIRTIO_F_ANY_LAYOUT, 581e0a84eaSCindy Lu VIRTIO_F_VERSION_1, 591e0a84eaSCindy Lu VIRTIO_NET_F_CSUM, 601e0a84eaSCindy Lu VIRTIO_NET_F_GUEST_CSUM, 6151e84244SEugenio Pérez VIRTIO_NET_F_CTRL_GUEST_OFFLOADS, 621e0a84eaSCindy Lu VIRTIO_NET_F_GSO, 631e0a84eaSCindy Lu VIRTIO_NET_F_GUEST_TSO4, 641e0a84eaSCindy Lu VIRTIO_NET_F_GUEST_TSO6, 651e0a84eaSCindy Lu VIRTIO_NET_F_GUEST_ECN, 661e0a84eaSCindy Lu VIRTIO_NET_F_GUEST_UFO, 671e0a84eaSCindy Lu VIRTIO_NET_F_HOST_TSO4, 681e0a84eaSCindy Lu VIRTIO_NET_F_HOST_TSO6, 691e0a84eaSCindy Lu VIRTIO_NET_F_HOST_ECN, 701e0a84eaSCindy Lu VIRTIO_NET_F_HOST_UFO, 711e0a84eaSCindy Lu VIRTIO_NET_F_MRG_RXBUF, 721e0a84eaSCindy Lu VIRTIO_NET_F_MTU, 7340237840SJason Wang VIRTIO_NET_F_CTRL_RX, 7440237840SJason Wang VIRTIO_NET_F_CTRL_RX_EXTRA, 7540237840SJason Wang VIRTIO_NET_F_CTRL_VLAN, 7640237840SJason Wang VIRTIO_NET_F_CTRL_MAC_ADDR, 7740237840SJason Wang VIRTIO_NET_F_RSS, 7840237840SJason Wang VIRTIO_NET_F_MQ, 7940237840SJason Wang VIRTIO_NET_F_CTRL_VQ, 801e0a84eaSCindy Lu VIRTIO_F_IOMMU_PLATFORM, 811e0a84eaSCindy Lu VIRTIO_F_RING_PACKED, 82562a7d23SStefano Garzarella VIRTIO_F_RING_RESET, 830145c393SAndrew Melnychenko VIRTIO_NET_F_RSS, 840145c393SAndrew Melnychenko VIRTIO_NET_F_HASH_REPORT, 859aa47eddSSi-Wei Liu VIRTIO_NET_F_STATUS, 861e0a84eaSCindy Lu VHOST_INVALID_FEATURE_BIT 871e0a84eaSCindy Lu }; 881e0a84eaSCindy Lu 891576dbb5SEugenio Pérez /** Supported device specific feature bits with SVQ */ 901576dbb5SEugenio Pérez static const uint64_t vdpa_svq_device_features = 911576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_CSUM) | 921576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_GUEST_CSUM) | 934b4a1378SHawkins Jiawei BIT_ULL(VIRTIO_NET_F_CTRL_GUEST_OFFLOADS) | 941576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_MTU) | 951576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_MAC) | 961576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_GUEST_TSO4) | 971576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_GUEST_TSO6) | 981576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_GUEST_ECN) | 991576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_GUEST_UFO) | 1001576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_HOST_TSO4) | 1011576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_HOST_TSO6) | 1021576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_HOST_ECN) | 1031576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_HOST_UFO) | 1041576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_MRG_RXBUF) | 1051576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_STATUS) | 1061576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_CTRL_VQ) | 10772b99a87SEugenio Pérez BIT_ULL(VIRTIO_NET_F_MQ) | 1081576dbb5SEugenio Pérez BIT_ULL(VIRTIO_F_ANY_LAYOUT) | 1091576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_CTRL_MAC_ADDR) | 110609ab4c3SEugenio Pérez /* VHOST_F_LOG_ALL is exposed by SVQ */ 111609ab4c3SEugenio Pérez BIT_ULL(VHOST_F_LOG_ALL) | 1121576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_RSC_EXT) | 1130d74e2b7SEugenio Pérez BIT_ULL(VIRTIO_NET_F_STANDBY) | 1140d74e2b7SEugenio Pérez BIT_ULL(VIRTIO_NET_F_SPEED_DUPLEX); 1151576dbb5SEugenio Pérez 116c1a10086SEugenio Pérez #define VHOST_VDPA_NET_CVQ_ASID 1 117c1a10086SEugenio Pérez 1181e0a84eaSCindy Lu VHostNetState *vhost_vdpa_get_vhost_net(NetClientState *nc) 1191e0a84eaSCindy Lu { 1201e0a84eaSCindy Lu VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); 1211e0a84eaSCindy Lu assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 1221e0a84eaSCindy Lu return s->vhost_net; 1231e0a84eaSCindy Lu } 1241e0a84eaSCindy Lu 125915bf6ccSEugenio Pérez static size_t vhost_vdpa_net_cvq_cmd_len(void) 126915bf6ccSEugenio Pérez { 127915bf6ccSEugenio Pérez /* 128915bf6ccSEugenio Pérez * MAC_TABLE_SET is the ctrl command that produces the longer out buffer. 129915bf6ccSEugenio Pérez * In buffer is always 1 byte, so it should fit here 130915bf6ccSEugenio Pérez */ 131915bf6ccSEugenio Pérez return sizeof(struct virtio_net_ctrl_hdr) + 132915bf6ccSEugenio Pérez 2 * sizeof(struct virtio_net_ctrl_mac) + 133915bf6ccSEugenio Pérez MAC_TABLE_ENTRIES * ETH_ALEN; 134915bf6ccSEugenio Pérez } 135915bf6ccSEugenio Pérez 136915bf6ccSEugenio Pérez static size_t vhost_vdpa_net_cvq_cmd_page_len(void) 137915bf6ccSEugenio Pérez { 138915bf6ccSEugenio Pérez return ROUND_UP(vhost_vdpa_net_cvq_cmd_len(), qemu_real_host_page_size()); 139915bf6ccSEugenio Pérez } 140915bf6ccSEugenio Pérez 14136e46472SEugenio Pérez static bool vhost_vdpa_net_valid_svq_features(uint64_t features, Error **errp) 14236e46472SEugenio Pérez { 14336e46472SEugenio Pérez uint64_t invalid_dev_features = 14436e46472SEugenio Pérez features & ~vdpa_svq_device_features & 14536e46472SEugenio Pérez /* Transport are all accepted at this point */ 14636e46472SEugenio Pérez ~MAKE_64BIT_MASK(VIRTIO_TRANSPORT_F_START, 14736e46472SEugenio Pérez VIRTIO_TRANSPORT_F_END - VIRTIO_TRANSPORT_F_START); 14836e46472SEugenio Pérez 14936e46472SEugenio Pérez if (invalid_dev_features) { 15036e46472SEugenio Pérez error_setg(errp, "vdpa svq does not work with features 0x%" PRIx64, 15136e46472SEugenio Pérez invalid_dev_features); 152258a0394SEugenio Pérez return false; 15336e46472SEugenio Pérez } 15436e46472SEugenio Pérez 155258a0394SEugenio Pérez return vhost_svq_valid_features(features, errp); 15636e46472SEugenio Pérez } 15736e46472SEugenio Pérez 1581e0a84eaSCindy Lu static int vhost_vdpa_net_check_device_id(struct vhost_net *net) 1591e0a84eaSCindy Lu { 1601e0a84eaSCindy Lu uint32_t device_id; 1611e0a84eaSCindy Lu int ret; 1621e0a84eaSCindy Lu struct vhost_dev *hdev; 1631e0a84eaSCindy Lu 1641e0a84eaSCindy Lu hdev = (struct vhost_dev *)&net->dev; 1651e0a84eaSCindy Lu ret = hdev->vhost_ops->vhost_get_device_id(hdev, &device_id); 1661e0a84eaSCindy Lu if (device_id != VIRTIO_ID_NET) { 1671e0a84eaSCindy Lu return -ENOTSUP; 1681e0a84eaSCindy Lu } 1691e0a84eaSCindy Lu return ret; 1701e0a84eaSCindy Lu } 1711e0a84eaSCindy Lu 17240237840SJason Wang static int vhost_vdpa_add(NetClientState *ncs, void *be, 17340237840SJason Wang int queue_pair_index, int nvqs) 1741e0a84eaSCindy Lu { 1751e0a84eaSCindy Lu VhostNetOptions options; 1761e0a84eaSCindy Lu struct vhost_net *net = NULL; 1771e0a84eaSCindy Lu VhostVDPAState *s; 1781e0a84eaSCindy Lu int ret; 1791e0a84eaSCindy Lu 1801e0a84eaSCindy Lu options.backend_type = VHOST_BACKEND_TYPE_VDPA; 1811e0a84eaSCindy Lu assert(ncs->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 1821e0a84eaSCindy Lu s = DO_UPCAST(VhostVDPAState, nc, ncs); 1831e0a84eaSCindy Lu options.net_backend = ncs; 1841e0a84eaSCindy Lu options.opaque = be; 1851e0a84eaSCindy Lu options.busyloop_timeout = 0; 18640237840SJason Wang options.nvqs = nvqs; 1871e0a84eaSCindy Lu 1881e0a84eaSCindy Lu net = vhost_net_init(&options); 1891e0a84eaSCindy Lu if (!net) { 1901e0a84eaSCindy Lu error_report("failed to init vhost_net for queue"); 191a97ef87aSJason Wang goto err_init; 1921e0a84eaSCindy Lu } 1931e0a84eaSCindy Lu s->vhost_net = net; 1941e0a84eaSCindy Lu ret = vhost_vdpa_net_check_device_id(net); 1951e0a84eaSCindy Lu if (ret) { 196a97ef87aSJason Wang goto err_check; 1971e0a84eaSCindy Lu } 1981e0a84eaSCindy Lu return 0; 199a97ef87aSJason Wang err_check: 2001e0a84eaSCindy Lu vhost_net_cleanup(net); 201ab36edcfSJason Wang g_free(net); 202a97ef87aSJason Wang err_init: 2031e0a84eaSCindy Lu return -1; 2041e0a84eaSCindy Lu } 2051e0a84eaSCindy Lu 2061e0a84eaSCindy Lu static void vhost_vdpa_cleanup(NetClientState *nc) 2071e0a84eaSCindy Lu { 2081e0a84eaSCindy Lu VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); 2091e0a84eaSCindy Lu 210babf8b87SEugenio Pérez munmap(s->cvq_cmd_out_buffer, vhost_vdpa_net_cvq_cmd_page_len()); 211babf8b87SEugenio Pérez munmap(s->status, vhost_vdpa_net_cvq_cmd_page_len()); 2121e0a84eaSCindy Lu if (s->vhost_net) { 2131e0a84eaSCindy Lu vhost_net_cleanup(s->vhost_net); 2141e0a84eaSCindy Lu g_free(s->vhost_net); 2151e0a84eaSCindy Lu s->vhost_net = NULL; 2161e0a84eaSCindy Lu } 21757b3a7d8SCindy Lu if (s->vhost_vdpa.device_fd >= 0) { 21857b3a7d8SCindy Lu qemu_close(s->vhost_vdpa.device_fd); 21957b3a7d8SCindy Lu s->vhost_vdpa.device_fd = -1; 22057b3a7d8SCindy Lu } 2211e0a84eaSCindy Lu } 2221e0a84eaSCindy Lu 2231e0a84eaSCindy Lu static bool vhost_vdpa_has_vnet_hdr(NetClientState *nc) 2241e0a84eaSCindy Lu { 2251e0a84eaSCindy Lu assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 2261e0a84eaSCindy Lu 2271e0a84eaSCindy Lu return true; 2281e0a84eaSCindy Lu } 2291e0a84eaSCindy Lu 2301e0a84eaSCindy Lu static bool vhost_vdpa_has_ufo(NetClientState *nc) 2311e0a84eaSCindy Lu { 2321e0a84eaSCindy Lu assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 2331e0a84eaSCindy Lu VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); 2341e0a84eaSCindy Lu uint64_t features = 0; 2351e0a84eaSCindy Lu features |= (1ULL << VIRTIO_NET_F_HOST_UFO); 2361e0a84eaSCindy Lu features = vhost_net_get_features(s->vhost_net, features); 2371e0a84eaSCindy Lu return !!(features & (1ULL << VIRTIO_NET_F_HOST_UFO)); 2381e0a84eaSCindy Lu 2391e0a84eaSCindy Lu } 2401e0a84eaSCindy Lu 241ee8a1c63SKevin Wolf static bool vhost_vdpa_check_peer_type(NetClientState *nc, ObjectClass *oc, 242ee8a1c63SKevin Wolf Error **errp) 243ee8a1c63SKevin Wolf { 244ee8a1c63SKevin Wolf const char *driver = object_class_get_name(oc); 245ee8a1c63SKevin Wolf 246ee8a1c63SKevin Wolf if (!g_str_has_prefix(driver, "virtio-net-")) { 247ee8a1c63SKevin Wolf error_setg(errp, "vhost-vdpa requires frontend driver virtio-net-*"); 248ee8a1c63SKevin Wolf return false; 249ee8a1c63SKevin Wolf } 250ee8a1c63SKevin Wolf 251ee8a1c63SKevin Wolf return true; 252ee8a1c63SKevin Wolf } 253ee8a1c63SKevin Wolf 254846a1e85SEugenio Pérez /** Dummy receive in case qemu falls back to userland tap networking */ 255846a1e85SEugenio Pérez static ssize_t vhost_vdpa_receive(NetClientState *nc, const uint8_t *buf, 256846a1e85SEugenio Pérez size_t size) 257846a1e85SEugenio Pérez { 258bc5add1dSSi-Wei Liu return size; 259846a1e85SEugenio Pérez } 260846a1e85SEugenio Pérez 26100ef422eSEugenio Pérez /** From any vdpa net client, get the netclient of the first queue pair */ 26200ef422eSEugenio Pérez static VhostVDPAState *vhost_vdpa_net_first_nc_vdpa(VhostVDPAState *s) 26300ef422eSEugenio Pérez { 26400ef422eSEugenio Pérez NICState *nic = qemu_get_nic(s->nc.peer); 26500ef422eSEugenio Pérez NetClientState *nc0 = qemu_get_peer(nic->ncs, 0); 26600ef422eSEugenio Pérez 26700ef422eSEugenio Pérez return DO_UPCAST(VhostVDPAState, nc, nc0); 26800ef422eSEugenio Pérez } 26900ef422eSEugenio Pérez 27069498430SEugenio Pérez static void vhost_vdpa_net_log_global_enable(VhostVDPAState *s, bool enable) 27169498430SEugenio Pérez { 27269498430SEugenio Pérez struct vhost_vdpa *v = &s->vhost_vdpa; 27369498430SEugenio Pérez VirtIONet *n; 27469498430SEugenio Pérez VirtIODevice *vdev; 27569498430SEugenio Pérez int data_queue_pairs, cvq, r; 27669498430SEugenio Pérez 27769498430SEugenio Pérez /* We are only called on the first data vqs and only if x-svq is not set */ 27869498430SEugenio Pérez if (s->vhost_vdpa.shadow_vqs_enabled == enable) { 27969498430SEugenio Pérez return; 28069498430SEugenio Pérez } 28169498430SEugenio Pérez 28269498430SEugenio Pérez vdev = v->dev->vdev; 28369498430SEugenio Pérez n = VIRTIO_NET(vdev); 28469498430SEugenio Pérez if (!n->vhost_started) { 28569498430SEugenio Pérez return; 28669498430SEugenio Pérez } 28769498430SEugenio Pérez 28869498430SEugenio Pérez data_queue_pairs = n->multiqueue ? n->max_queue_pairs : 1; 28969498430SEugenio Pérez cvq = virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ) ? 29069498430SEugenio Pérez n->max_ncs - n->max_queue_pairs : 0; 29169498430SEugenio Pérez /* 29269498430SEugenio Pérez * TODO: vhost_net_stop does suspend, get_base and reset. We can be smarter 29369498430SEugenio Pérez * in the future and resume the device if read-only operations between 29469498430SEugenio Pérez * suspend and reset goes wrong. 29569498430SEugenio Pérez */ 29669498430SEugenio Pérez vhost_net_stop(vdev, n->nic->ncs, data_queue_pairs, cvq); 29769498430SEugenio Pérez 29869498430SEugenio Pérez /* Start will check migration setup_or_active to configure or not SVQ */ 29969498430SEugenio Pérez r = vhost_net_start(vdev, n->nic->ncs, data_queue_pairs, cvq); 30069498430SEugenio Pérez if (unlikely(r < 0)) { 30169498430SEugenio Pérez error_report("unable to start vhost net: %s(%d)", g_strerror(-r), -r); 30269498430SEugenio Pérez } 30369498430SEugenio Pérez } 30469498430SEugenio Pérez 30569498430SEugenio Pérez static void vdpa_net_migration_state_notifier(Notifier *notifier, void *data) 30669498430SEugenio Pérez { 30769498430SEugenio Pérez MigrationState *migration = data; 30869498430SEugenio Pérez VhostVDPAState *s = container_of(notifier, VhostVDPAState, 30969498430SEugenio Pérez migration_state); 31069498430SEugenio Pérez 31169498430SEugenio Pérez if (migration_in_setup(migration)) { 31269498430SEugenio Pérez vhost_vdpa_net_log_global_enable(s, true); 31369498430SEugenio Pérez } else if (migration_has_failed(migration)) { 31469498430SEugenio Pérez vhost_vdpa_net_log_global_enable(s, false); 31569498430SEugenio Pérez } 31669498430SEugenio Pérez } 31769498430SEugenio Pérez 31800ef422eSEugenio Pérez static void vhost_vdpa_net_data_start_first(VhostVDPAState *s) 31900ef422eSEugenio Pérez { 32000ef422eSEugenio Pérez struct vhost_vdpa *v = &s->vhost_vdpa; 32100ef422eSEugenio Pérez 32269498430SEugenio Pérez add_migration_state_change_notifier(&s->migration_state); 32300ef422eSEugenio Pérez if (v->shadow_vqs_enabled) { 32400ef422eSEugenio Pérez v->iova_tree = vhost_iova_tree_new(v->iova_range.first, 32500ef422eSEugenio Pérez v->iova_range.last); 32600ef422eSEugenio Pérez } 32700ef422eSEugenio Pérez } 32800ef422eSEugenio Pérez 32900ef422eSEugenio Pérez static int vhost_vdpa_net_data_start(NetClientState *nc) 33000ef422eSEugenio Pérez { 33100ef422eSEugenio Pérez VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); 33200ef422eSEugenio Pérez struct vhost_vdpa *v = &s->vhost_vdpa; 33300ef422eSEugenio Pérez 33400ef422eSEugenio Pérez assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 33500ef422eSEugenio Pérez 33669498430SEugenio Pérez if (s->always_svq || 33769498430SEugenio Pérez migration_is_setup_or_active(migrate_get_current()->state)) { 33869498430SEugenio Pérez v->shadow_vqs_enabled = true; 33969498430SEugenio Pérez v->shadow_data = true; 34069498430SEugenio Pérez } else { 34169498430SEugenio Pérez v->shadow_vqs_enabled = false; 34269498430SEugenio Pérez v->shadow_data = false; 34369498430SEugenio Pérez } 34469498430SEugenio Pérez 34500ef422eSEugenio Pérez if (v->index == 0) { 34600ef422eSEugenio Pérez vhost_vdpa_net_data_start_first(s); 34700ef422eSEugenio Pérez return 0; 34800ef422eSEugenio Pérez } 34900ef422eSEugenio Pérez 35000ef422eSEugenio Pérez if (v->shadow_vqs_enabled) { 35100ef422eSEugenio Pérez VhostVDPAState *s0 = vhost_vdpa_net_first_nc_vdpa(s); 35200ef422eSEugenio Pérez v->iova_tree = s0->vhost_vdpa.iova_tree; 35300ef422eSEugenio Pérez } 35400ef422eSEugenio Pérez 35500ef422eSEugenio Pérez return 0; 35600ef422eSEugenio Pérez } 35700ef422eSEugenio Pérez 35800ef422eSEugenio Pérez static void vhost_vdpa_net_client_stop(NetClientState *nc) 35900ef422eSEugenio Pérez { 36000ef422eSEugenio Pérez VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); 36100ef422eSEugenio Pérez struct vhost_dev *dev; 36200ef422eSEugenio Pérez 36300ef422eSEugenio Pérez assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 36400ef422eSEugenio Pérez 36569498430SEugenio Pérez if (s->vhost_vdpa.index == 0) { 36669498430SEugenio Pérez remove_migration_state_change_notifier(&s->migration_state); 36769498430SEugenio Pérez } 36869498430SEugenio Pérez 36900ef422eSEugenio Pérez dev = s->vhost_vdpa.dev; 37000ef422eSEugenio Pérez if (dev->vq_index + dev->nvqs == dev->vq_index_end) { 37100ef422eSEugenio Pérez g_clear_pointer(&s->vhost_vdpa.iova_tree, vhost_iova_tree_delete); 37200ef422eSEugenio Pérez } 37300ef422eSEugenio Pérez } 37400ef422eSEugenio Pérez 3751e0a84eaSCindy Lu static NetClientInfo net_vhost_vdpa_info = { 3761e0a84eaSCindy Lu .type = NET_CLIENT_DRIVER_VHOST_VDPA, 3771e0a84eaSCindy Lu .size = sizeof(VhostVDPAState), 378846a1e85SEugenio Pérez .receive = vhost_vdpa_receive, 37900ef422eSEugenio Pérez .start = vhost_vdpa_net_data_start, 38000ef422eSEugenio Pérez .stop = vhost_vdpa_net_client_stop, 3811e0a84eaSCindy Lu .cleanup = vhost_vdpa_cleanup, 3821e0a84eaSCindy Lu .has_vnet_hdr = vhost_vdpa_has_vnet_hdr, 3831e0a84eaSCindy Lu .has_ufo = vhost_vdpa_has_ufo, 384ee8a1c63SKevin Wolf .check_peer_type = vhost_vdpa_check_peer_type, 3851e0a84eaSCindy Lu }; 3861e0a84eaSCindy Lu 387152128d6SEugenio Pérez static int64_t vhost_vdpa_get_vring_group(int device_fd, unsigned vq_index, 388152128d6SEugenio Pérez Error **errp) 389c1a10086SEugenio Pérez { 390c1a10086SEugenio Pérez struct vhost_vring_state state = { 391c1a10086SEugenio Pérez .index = vq_index, 392c1a10086SEugenio Pérez }; 393c1a10086SEugenio Pérez int r = ioctl(device_fd, VHOST_VDPA_GET_VRING_GROUP, &state); 394c1a10086SEugenio Pérez 395c1a10086SEugenio Pérez if (unlikely(r < 0)) { 3960f2bb0bfSEugenio Pérez r = -errno; 397152128d6SEugenio Pérez error_setg_errno(errp, errno, "Cannot get VQ %u group", vq_index); 398c1a10086SEugenio Pérez return r; 399c1a10086SEugenio Pérez } 400c1a10086SEugenio Pérez 401c1a10086SEugenio Pérez return state.num; 402c1a10086SEugenio Pérez } 403c1a10086SEugenio Pérez 404c1a10086SEugenio Pérez static int vhost_vdpa_set_address_space_id(struct vhost_vdpa *v, 405c1a10086SEugenio Pérez unsigned vq_group, 406c1a10086SEugenio Pérez unsigned asid_num) 407c1a10086SEugenio Pérez { 408c1a10086SEugenio Pérez struct vhost_vring_state asid = { 409c1a10086SEugenio Pérez .index = vq_group, 410c1a10086SEugenio Pérez .num = asid_num, 411c1a10086SEugenio Pérez }; 412c1a10086SEugenio Pérez int r; 413c1a10086SEugenio Pérez 414c1a10086SEugenio Pérez r = ioctl(v->device_fd, VHOST_VDPA_SET_GROUP_ASID, &asid); 415c1a10086SEugenio Pérez if (unlikely(r < 0)) { 416c1a10086SEugenio Pérez error_report("Can't set vq group %u asid %u, errno=%d (%s)", 417c1a10086SEugenio Pérez asid.index, asid.num, errno, g_strerror(errno)); 418c1a10086SEugenio Pérez } 419c1a10086SEugenio Pérez return r; 420c1a10086SEugenio Pérez } 421c1a10086SEugenio Pérez 4222df4dd31SEugenio Pérez static void vhost_vdpa_cvq_unmap_buf(struct vhost_vdpa *v, void *addr) 4232df4dd31SEugenio Pérez { 4242df4dd31SEugenio Pérez VhostIOVATree *tree = v->iova_tree; 4252df4dd31SEugenio Pérez DMAMap needle = { 4262df4dd31SEugenio Pérez /* 4272df4dd31SEugenio Pérez * No need to specify size or to look for more translations since 4282df4dd31SEugenio Pérez * this contiguous chunk was allocated by us. 4292df4dd31SEugenio Pérez */ 4302df4dd31SEugenio Pérez .translated_addr = (hwaddr)(uintptr_t)addr, 4312df4dd31SEugenio Pérez }; 4322df4dd31SEugenio Pérez const DMAMap *map = vhost_iova_tree_find_iova(tree, &needle); 4332df4dd31SEugenio Pérez int r; 4342df4dd31SEugenio Pérez 4352df4dd31SEugenio Pérez if (unlikely(!map)) { 4362df4dd31SEugenio Pérez error_report("Cannot locate expected map"); 4372df4dd31SEugenio Pérez return; 4382df4dd31SEugenio Pérez } 4392df4dd31SEugenio Pérez 440cd831ed5SEugenio Pérez r = vhost_vdpa_dma_unmap(v, v->address_space_id, map->iova, map->size + 1); 4412df4dd31SEugenio Pérez if (unlikely(r != 0)) { 4422df4dd31SEugenio Pérez error_report("Device cannot unmap: %s(%d)", g_strerror(r), r); 4432df4dd31SEugenio Pérez } 4442df4dd31SEugenio Pérez 44569292a8eSEugenio Pérez vhost_iova_tree_remove(tree, *map); 4462df4dd31SEugenio Pérez } 4472df4dd31SEugenio Pérez 4487a7f87e9SEugenio Pérez /** Map CVQ buffer. */ 4497a7f87e9SEugenio Pérez static int vhost_vdpa_cvq_map_buf(struct vhost_vdpa *v, void *buf, size_t size, 4507a7f87e9SEugenio Pérez bool write) 4512df4dd31SEugenio Pérez { 4522df4dd31SEugenio Pérez DMAMap map = {}; 4532df4dd31SEugenio Pérez int r; 4542df4dd31SEugenio Pérez 4552df4dd31SEugenio Pérez map.translated_addr = (hwaddr)(uintptr_t)buf; 4567a7f87e9SEugenio Pérez map.size = size - 1; 4572df4dd31SEugenio Pérez map.perm = write ? IOMMU_RW : IOMMU_RO, 4582df4dd31SEugenio Pérez r = vhost_iova_tree_map_alloc(v->iova_tree, &map); 4592df4dd31SEugenio Pérez if (unlikely(r != IOVA_OK)) { 4602df4dd31SEugenio Pérez error_report("Cannot map injected element"); 4617a7f87e9SEugenio Pérez return r; 4622df4dd31SEugenio Pérez } 4632df4dd31SEugenio Pérez 464cd831ed5SEugenio Pérez r = vhost_vdpa_dma_map(v, v->address_space_id, map.iova, 465cd831ed5SEugenio Pérez vhost_vdpa_net_cvq_cmd_page_len(), buf, !write); 4662df4dd31SEugenio Pérez if (unlikely(r < 0)) { 4672df4dd31SEugenio Pérez goto dma_map_err; 4682df4dd31SEugenio Pérez } 4692df4dd31SEugenio Pérez 4707a7f87e9SEugenio Pérez return 0; 4712df4dd31SEugenio Pérez 4722df4dd31SEugenio Pérez dma_map_err: 47369292a8eSEugenio Pérez vhost_iova_tree_remove(v->iova_tree, map); 4747a7f87e9SEugenio Pérez return r; 4752df4dd31SEugenio Pérez } 4762df4dd31SEugenio Pérez 4777a7f87e9SEugenio Pérez static int vhost_vdpa_net_cvq_start(NetClientState *nc) 4782df4dd31SEugenio Pérez { 47900ef422eSEugenio Pérez VhostVDPAState *s, *s0; 480c1a10086SEugenio Pérez struct vhost_vdpa *v; 481c1a10086SEugenio Pérez int64_t cvq_group; 482152128d6SEugenio Pérez int r; 483152128d6SEugenio Pérez Error *err = NULL; 4842df4dd31SEugenio Pérez 4857a7f87e9SEugenio Pérez assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 4867a7f87e9SEugenio Pérez 4877a7f87e9SEugenio Pérez s = DO_UPCAST(VhostVDPAState, nc, nc); 488c1a10086SEugenio Pérez v = &s->vhost_vdpa; 489c1a10086SEugenio Pérez 49069498430SEugenio Pérez s0 = vhost_vdpa_net_first_nc_vdpa(s); 49169498430SEugenio Pérez v->shadow_data = s0->vhost_vdpa.shadow_vqs_enabled; 492c1a10086SEugenio Pérez v->shadow_vqs_enabled = s->always_svq; 493c1a10086SEugenio Pérez s->vhost_vdpa.address_space_id = VHOST_VDPA_GUEST_PA_ASID; 494c1a10086SEugenio Pérez 49569498430SEugenio Pérez if (s->vhost_vdpa.shadow_data) { 496c1a10086SEugenio Pérez /* SVQ is already configured for all virtqueues */ 497c1a10086SEugenio Pérez goto out; 498c1a10086SEugenio Pérez } 499c1a10086SEugenio Pérez 500c1a10086SEugenio Pérez /* 501c1a10086SEugenio Pérez * If we early return in these cases SVQ will not be enabled. The migration 502c1a10086SEugenio Pérez * will be blocked as long as vhost-vdpa backends will not offer _F_LOG. 503c1a10086SEugenio Pérez */ 504152128d6SEugenio Pérez if (!vhost_vdpa_net_valid_svq_features(v->dev->features, NULL)) { 505c1a10086SEugenio Pérez return 0; 506c1a10086SEugenio Pérez } 507c1a10086SEugenio Pérez 508152128d6SEugenio Pérez if (!s->cvq_isolated) { 509152128d6SEugenio Pérez return 0; 510152128d6SEugenio Pérez } 511152128d6SEugenio Pérez 512152128d6SEugenio Pérez cvq_group = vhost_vdpa_get_vring_group(v->device_fd, 513152128d6SEugenio Pérez v->dev->vq_index_end - 1, 514152128d6SEugenio Pérez &err); 515c1a10086SEugenio Pérez if (unlikely(cvq_group < 0)) { 516152128d6SEugenio Pérez error_report_err(err); 517c1a10086SEugenio Pérez return cvq_group; 518c1a10086SEugenio Pérez } 519c1a10086SEugenio Pérez 520c1a10086SEugenio Pérez r = vhost_vdpa_set_address_space_id(v, cvq_group, VHOST_VDPA_NET_CVQ_ASID); 521c1a10086SEugenio Pérez if (unlikely(r < 0)) { 522c1a10086SEugenio Pérez return r; 523c1a10086SEugenio Pérez } 524c1a10086SEugenio Pérez 525c1a10086SEugenio Pérez v->shadow_vqs_enabled = true; 526c1a10086SEugenio Pérez s->vhost_vdpa.address_space_id = VHOST_VDPA_NET_CVQ_ASID; 527c1a10086SEugenio Pérez 528c1a10086SEugenio Pérez out: 5297a7f87e9SEugenio Pérez if (!s->vhost_vdpa.shadow_vqs_enabled) { 5307a7f87e9SEugenio Pérez return 0; 5312df4dd31SEugenio Pérez } 5322df4dd31SEugenio Pérez 53300ef422eSEugenio Pérez if (s0->vhost_vdpa.iova_tree) { 53400ef422eSEugenio Pérez /* 53500ef422eSEugenio Pérez * SVQ is already configured for all virtqueues. Reuse IOVA tree for 53600ef422eSEugenio Pérez * simplicity, whether CVQ shares ASID with guest or not, because: 53700ef422eSEugenio Pérez * - Memory listener need access to guest's memory addresses allocated 53800ef422eSEugenio Pérez * in the IOVA tree. 53900ef422eSEugenio Pérez * - There should be plenty of IOVA address space for both ASID not to 54000ef422eSEugenio Pérez * worry about collisions between them. Guest's translations are 54100ef422eSEugenio Pérez * still validated with virtio virtqueue_pop so there is no risk for 54200ef422eSEugenio Pérez * the guest to access memory that it shouldn't. 54300ef422eSEugenio Pérez * 54400ef422eSEugenio Pérez * To allocate a iova tree per ASID is doable but it complicates the 54500ef422eSEugenio Pérez * code and it is not worth it for the moment. 54600ef422eSEugenio Pérez */ 54700ef422eSEugenio Pérez v->iova_tree = s0->vhost_vdpa.iova_tree; 54800ef422eSEugenio Pérez } else { 54900ef422eSEugenio Pérez v->iova_tree = vhost_iova_tree_new(v->iova_range.first, 55000ef422eSEugenio Pérez v->iova_range.last); 55100ef422eSEugenio Pérez } 55200ef422eSEugenio Pérez 5537a7f87e9SEugenio Pérez r = vhost_vdpa_cvq_map_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer, 5547a7f87e9SEugenio Pérez vhost_vdpa_net_cvq_cmd_page_len(), false); 5557a7f87e9SEugenio Pérez if (unlikely(r < 0)) { 5567a7f87e9SEugenio Pérez return r; 5577a7f87e9SEugenio Pérez } 5587a7f87e9SEugenio Pérez 55917fb889fSEugenio Pérez r = vhost_vdpa_cvq_map_buf(&s->vhost_vdpa, s->status, 5607a7f87e9SEugenio Pérez vhost_vdpa_net_cvq_cmd_page_len(), true); 5617a7f87e9SEugenio Pérez if (unlikely(r < 0)) { 5622df4dd31SEugenio Pérez vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer); 5632df4dd31SEugenio Pérez } 5642df4dd31SEugenio Pérez 5657a7f87e9SEugenio Pérez return r; 5667a7f87e9SEugenio Pérez } 5677a7f87e9SEugenio Pérez 5687a7f87e9SEugenio Pérez static void vhost_vdpa_net_cvq_stop(NetClientState *nc) 5697a7f87e9SEugenio Pérez { 5707a7f87e9SEugenio Pérez VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); 5717a7f87e9SEugenio Pérez 5727a7f87e9SEugenio Pérez assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 5737a7f87e9SEugenio Pérez 5747a7f87e9SEugenio Pérez if (s->vhost_vdpa.shadow_vqs_enabled) { 5757a7f87e9SEugenio Pérez vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer); 57617fb889fSEugenio Pérez vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->status); 577c1a10086SEugenio Pérez } 57800ef422eSEugenio Pérez 57900ef422eSEugenio Pérez vhost_vdpa_net_client_stop(nc); 5802df4dd31SEugenio Pérez } 5812df4dd31SEugenio Pérez 582be4278b6SEugenio Pérez static ssize_t vhost_vdpa_net_cvq_add(VhostVDPAState *s, size_t out_len, 583be4278b6SEugenio Pérez size_t in_len) 584be4278b6SEugenio Pérez { 585be4278b6SEugenio Pérez /* Buffers for the device */ 586be4278b6SEugenio Pérez const struct iovec out = { 587be4278b6SEugenio Pérez .iov_base = s->cvq_cmd_out_buffer, 588be4278b6SEugenio Pérez .iov_len = out_len, 589be4278b6SEugenio Pérez }; 590be4278b6SEugenio Pérez const struct iovec in = { 59117fb889fSEugenio Pérez .iov_base = s->status, 592be4278b6SEugenio Pérez .iov_len = sizeof(virtio_net_ctrl_ack), 593be4278b6SEugenio Pérez }; 594be4278b6SEugenio Pérez VhostShadowVirtqueue *svq = g_ptr_array_index(s->vhost_vdpa.shadow_vqs, 0); 595be4278b6SEugenio Pérez int r; 596be4278b6SEugenio Pérez 597be4278b6SEugenio Pérez r = vhost_svq_add(svq, &out, 1, &in, 1, NULL); 598be4278b6SEugenio Pérez if (unlikely(r != 0)) { 599be4278b6SEugenio Pérez if (unlikely(r == -ENOSPC)) { 600be4278b6SEugenio Pérez qemu_log_mask(LOG_GUEST_ERROR, "%s: No space on device queue\n", 601be4278b6SEugenio Pérez __func__); 602be4278b6SEugenio Pérez } 603be4278b6SEugenio Pérez return r; 604be4278b6SEugenio Pérez } 605be4278b6SEugenio Pérez 606be4278b6SEugenio Pérez /* 607be4278b6SEugenio Pérez * We can poll here since we've had BQL from the time we sent the 608be4278b6SEugenio Pérez * descriptor. Also, we need to take the answer before SVQ pulls by itself, 609be4278b6SEugenio Pérez * when BQL is released 610be4278b6SEugenio Pérez */ 611be4278b6SEugenio Pérez return vhost_svq_poll(svq); 612be4278b6SEugenio Pérez } 613be4278b6SEugenio Pérez 614f73c0c43SEugenio Pérez static ssize_t vhost_vdpa_net_load_cmd(VhostVDPAState *s, uint8_t class, 615f73c0c43SEugenio Pérez uint8_t cmd, const void *data, 616f73c0c43SEugenio Pérez size_t data_size) 617f73c0c43SEugenio Pérez { 618f73c0c43SEugenio Pérez const struct virtio_net_ctrl_hdr ctrl = { 619f73c0c43SEugenio Pérez .class = class, 620f73c0c43SEugenio Pérez .cmd = cmd, 621f73c0c43SEugenio Pérez }; 622f73c0c43SEugenio Pérez 623f73c0c43SEugenio Pérez assert(data_size < vhost_vdpa_net_cvq_cmd_page_len() - sizeof(ctrl)); 624f73c0c43SEugenio Pérez 625f73c0c43SEugenio Pérez memcpy(s->cvq_cmd_out_buffer, &ctrl, sizeof(ctrl)); 626f73c0c43SEugenio Pérez memcpy(s->cvq_cmd_out_buffer + sizeof(ctrl), data, data_size); 627f73c0c43SEugenio Pérez 628f73c0c43SEugenio Pérez return vhost_vdpa_net_cvq_add(s, sizeof(ctrl) + data_size, 629f73c0c43SEugenio Pérez sizeof(virtio_net_ctrl_ack)); 630f73c0c43SEugenio Pérez } 631f73c0c43SEugenio Pérez 632f73c0c43SEugenio Pérez static int vhost_vdpa_net_load_mac(VhostVDPAState *s, const VirtIONet *n) 633f73c0c43SEugenio Pérez { 63402d3bf09SHawkins Jiawei if (virtio_vdev_has_feature(&n->parent_obj, VIRTIO_NET_F_CTRL_MAC_ADDR)) { 635f73c0c43SEugenio Pérez ssize_t dev_written = vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_MAC, 636f73c0c43SEugenio Pérez VIRTIO_NET_CTRL_MAC_ADDR_SET, 637f73c0c43SEugenio Pérez n->mac, sizeof(n->mac)); 638f73c0c43SEugenio Pérez if (unlikely(dev_written < 0)) { 639f73c0c43SEugenio Pérez return dev_written; 640f73c0c43SEugenio Pérez } 641f73c0c43SEugenio Pérez 642f73c0c43SEugenio Pérez return *s->status != VIRTIO_NET_OK; 643f73c0c43SEugenio Pérez } 644f73c0c43SEugenio Pérez 645f73c0c43SEugenio Pérez return 0; 646f73c0c43SEugenio Pérez } 647f73c0c43SEugenio Pérez 648f64c7cdaSEugenio Pérez static int vhost_vdpa_net_load_mq(VhostVDPAState *s, 649f64c7cdaSEugenio Pérez const VirtIONet *n) 650f64c7cdaSEugenio Pérez { 651f64c7cdaSEugenio Pérez struct virtio_net_ctrl_mq mq; 652f64c7cdaSEugenio Pérez ssize_t dev_written; 653f64c7cdaSEugenio Pérez 65402d3bf09SHawkins Jiawei if (!virtio_vdev_has_feature(&n->parent_obj, VIRTIO_NET_F_MQ)) { 655f64c7cdaSEugenio Pérez return 0; 656f64c7cdaSEugenio Pérez } 657f64c7cdaSEugenio Pérez 658f64c7cdaSEugenio Pérez mq.virtqueue_pairs = cpu_to_le16(n->curr_queue_pairs); 659f64c7cdaSEugenio Pérez dev_written = vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_MQ, 660f64c7cdaSEugenio Pérez VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET, &mq, 661f64c7cdaSEugenio Pérez sizeof(mq)); 662f64c7cdaSEugenio Pérez if (unlikely(dev_written < 0)) { 663f64c7cdaSEugenio Pérez return dev_written; 664f64c7cdaSEugenio Pérez } 665f64c7cdaSEugenio Pérez 666f64c7cdaSEugenio Pérez return *s->status != VIRTIO_NET_OK; 667f64c7cdaSEugenio Pérez } 668f64c7cdaSEugenio Pérez 6690b58d368SHawkins Jiawei static int vhost_vdpa_net_load_offloads(VhostVDPAState *s, 6700b58d368SHawkins Jiawei const VirtIONet *n) 6710b58d368SHawkins Jiawei { 6720b58d368SHawkins Jiawei uint64_t offloads; 6730b58d368SHawkins Jiawei ssize_t dev_written; 6740b58d368SHawkins Jiawei 6750b58d368SHawkins Jiawei if (!virtio_vdev_has_feature(&n->parent_obj, 6760b58d368SHawkins Jiawei VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) { 6770b58d368SHawkins Jiawei return 0; 6780b58d368SHawkins Jiawei } 6790b58d368SHawkins Jiawei 6800b58d368SHawkins Jiawei if (n->curr_guest_offloads == virtio_net_supported_guest_offloads(n)) { 6810b58d368SHawkins Jiawei /* 6820b58d368SHawkins Jiawei * According to VirtIO standard, "Upon feature negotiation 6830b58d368SHawkins Jiawei * corresponding offload gets enabled to preserve 6840b58d368SHawkins Jiawei * backward compatibility.". 6850b58d368SHawkins Jiawei * 6860b58d368SHawkins Jiawei * Therefore, there is no need to send this CVQ command if the 6870b58d368SHawkins Jiawei * driver also enables all supported offloads, which aligns with 6880b58d368SHawkins Jiawei * the device's defaults. 6890b58d368SHawkins Jiawei * 6900b58d368SHawkins Jiawei * Note that the device's defaults can mismatch the driver's 6910b58d368SHawkins Jiawei * configuration only at live migration. 6920b58d368SHawkins Jiawei */ 6930b58d368SHawkins Jiawei return 0; 6940b58d368SHawkins Jiawei } 6950b58d368SHawkins Jiawei 6960b58d368SHawkins Jiawei offloads = cpu_to_le64(n->curr_guest_offloads); 6970b58d368SHawkins Jiawei dev_written = vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_GUEST_OFFLOADS, 6980b58d368SHawkins Jiawei VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET, 6990b58d368SHawkins Jiawei &offloads, sizeof(offloads)); 7000b58d368SHawkins Jiawei if (unlikely(dev_written < 0)) { 7010b58d368SHawkins Jiawei return dev_written; 7020b58d368SHawkins Jiawei } 7030b58d368SHawkins Jiawei 7040b58d368SHawkins Jiawei return *s->status != VIRTIO_NET_OK; 7050b58d368SHawkins Jiawei } 7060b58d368SHawkins Jiawei 707dd036d8dSEugenio Pérez static int vhost_vdpa_net_load(NetClientState *nc) 708dd036d8dSEugenio Pérez { 709dd036d8dSEugenio Pérez VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); 710f73c0c43SEugenio Pérez struct vhost_vdpa *v = &s->vhost_vdpa; 711dd036d8dSEugenio Pérez const VirtIONet *n; 712f73c0c43SEugenio Pérez int r; 713dd036d8dSEugenio Pérez 714dd036d8dSEugenio Pérez assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 715dd036d8dSEugenio Pérez 716dd036d8dSEugenio Pérez if (!v->shadow_vqs_enabled) { 717dd036d8dSEugenio Pérez return 0; 718dd036d8dSEugenio Pérez } 719dd036d8dSEugenio Pérez 720dd036d8dSEugenio Pérez n = VIRTIO_NET(v->dev->vdev); 721f73c0c43SEugenio Pérez r = vhost_vdpa_net_load_mac(s, n); 722f73c0c43SEugenio Pérez if (unlikely(r < 0)) { 723f73c0c43SEugenio Pérez return r; 724dd036d8dSEugenio Pérez } 725f64c7cdaSEugenio Pérez r = vhost_vdpa_net_load_mq(s, n); 726f64c7cdaSEugenio Pérez if (unlikely(r)) { 727f64c7cdaSEugenio Pérez return r; 728f64c7cdaSEugenio Pérez } 7290b58d368SHawkins Jiawei r = vhost_vdpa_net_load_offloads(s, n); 7300b58d368SHawkins Jiawei if (unlikely(r)) { 7310b58d368SHawkins Jiawei return r; 7320b58d368SHawkins Jiawei } 733dd036d8dSEugenio Pérez 734dd036d8dSEugenio Pérez return 0; 735dd036d8dSEugenio Pérez } 736dd036d8dSEugenio Pérez 737f8972b56SEugenio Pérez static NetClientInfo net_vhost_vdpa_cvq_info = { 738f8972b56SEugenio Pérez .type = NET_CLIENT_DRIVER_VHOST_VDPA, 739f8972b56SEugenio Pérez .size = sizeof(VhostVDPAState), 740f8972b56SEugenio Pérez .receive = vhost_vdpa_receive, 7417a7f87e9SEugenio Pérez .start = vhost_vdpa_net_cvq_start, 742dd036d8dSEugenio Pérez .load = vhost_vdpa_net_load, 7437a7f87e9SEugenio Pérez .stop = vhost_vdpa_net_cvq_stop, 744f8972b56SEugenio Pérez .cleanup = vhost_vdpa_cleanup, 745f8972b56SEugenio Pérez .has_vnet_hdr = vhost_vdpa_has_vnet_hdr, 746f8972b56SEugenio Pérez .has_ufo = vhost_vdpa_has_ufo, 747f8972b56SEugenio Pérez .check_peer_type = vhost_vdpa_check_peer_type, 748f8972b56SEugenio Pérez }; 749f8972b56SEugenio Pérez 7502df4dd31SEugenio Pérez /** 7512df4dd31SEugenio Pérez * Validate and copy control virtqueue commands. 7522df4dd31SEugenio Pérez * 7532df4dd31SEugenio Pérez * Following QEMU guidelines, we offer a copy of the buffers to the device to 7542df4dd31SEugenio Pérez * prevent TOCTOU bugs. 755bd907ae4SEugenio Pérez */ 756bd907ae4SEugenio Pérez static int vhost_vdpa_net_handle_ctrl_avail(VhostShadowVirtqueue *svq, 757bd907ae4SEugenio Pérez VirtQueueElement *elem, 758bd907ae4SEugenio Pérez void *opaque) 759bd907ae4SEugenio Pérez { 7602df4dd31SEugenio Pérez VhostVDPAState *s = opaque; 761be4278b6SEugenio Pérez size_t in_len; 762bd907ae4SEugenio Pérez virtio_net_ctrl_ack status = VIRTIO_NET_ERR; 7637a7f87e9SEugenio Pérez /* Out buffer sent to both the vdpa device and the device model */ 7647a7f87e9SEugenio Pérez struct iovec out = { 7657a7f87e9SEugenio Pérez .iov_base = s->cvq_cmd_out_buffer, 7667a7f87e9SEugenio Pérez }; 7672df4dd31SEugenio Pérez /* in buffer used for device model */ 7682df4dd31SEugenio Pérez const struct iovec in = { 7692df4dd31SEugenio Pérez .iov_base = &status, 7702df4dd31SEugenio Pérez .iov_len = sizeof(status), 7712df4dd31SEugenio Pérez }; 772be4278b6SEugenio Pérez ssize_t dev_written = -EINVAL; 773bd907ae4SEugenio Pérez 7747a7f87e9SEugenio Pérez out.iov_len = iov_to_buf(elem->out_sg, elem->out_num, 0, 7757a7f87e9SEugenio Pérez s->cvq_cmd_out_buffer, 7767a7f87e9SEugenio Pérez vhost_vdpa_net_cvq_cmd_len()); 7773f9a3eebSEugenio Pérez if (*(uint8_t *)s->cvq_cmd_out_buffer == VIRTIO_NET_CTRL_ANNOUNCE) { 7783f9a3eebSEugenio Pérez /* 7793f9a3eebSEugenio Pérez * Guest announce capability is emulated by qemu, so don't forward to 7803f9a3eebSEugenio Pérez * the device. 7813f9a3eebSEugenio Pérez */ 7823f9a3eebSEugenio Pérez dev_written = sizeof(status); 7833f9a3eebSEugenio Pérez *s->status = VIRTIO_NET_OK; 7843f9a3eebSEugenio Pérez } else { 785be4278b6SEugenio Pérez dev_written = vhost_vdpa_net_cvq_add(s, out.iov_len, sizeof(status)); 786be4278b6SEugenio Pérez if (unlikely(dev_written < 0)) { 787bd907ae4SEugenio Pérez goto out; 788bd907ae4SEugenio Pérez } 7893f9a3eebSEugenio Pérez } 790bd907ae4SEugenio Pérez 791bd907ae4SEugenio Pérez if (unlikely(dev_written < sizeof(status))) { 792bd907ae4SEugenio Pérez error_report("Insufficient written data (%zu)", dev_written); 7932df4dd31SEugenio Pérez goto out; 7942df4dd31SEugenio Pérez } 7952df4dd31SEugenio Pérez 79617fb889fSEugenio Pérez if (*s->status != VIRTIO_NET_OK) { 797*d45243bcSEugenio Pérez goto out; 7982df4dd31SEugenio Pérez } 7992df4dd31SEugenio Pérez 8002df4dd31SEugenio Pérez status = VIRTIO_NET_ERR; 8017a7f87e9SEugenio Pérez virtio_net_handle_ctrl_iov(svq->vdev, &in, 1, &out, 1); 8022df4dd31SEugenio Pérez if (status != VIRTIO_NET_OK) { 8032df4dd31SEugenio Pérez error_report("Bad CVQ processing in model"); 804bd907ae4SEugenio Pérez } 805bd907ae4SEugenio Pérez 806bd907ae4SEugenio Pérez out: 807bd907ae4SEugenio Pérez in_len = iov_from_buf(elem->in_sg, elem->in_num, 0, &status, 808bd907ae4SEugenio Pérez sizeof(status)); 809bd907ae4SEugenio Pérez if (unlikely(in_len < sizeof(status))) { 810bd907ae4SEugenio Pérez error_report("Bad device CVQ written length"); 811bd907ae4SEugenio Pérez } 812bd907ae4SEugenio Pérez vhost_svq_push_elem(svq, elem, MIN(in_len, sizeof(status))); 813bd907ae4SEugenio Pérez g_free(elem); 814be4278b6SEugenio Pérez return dev_written < 0 ? dev_written : 0; 815bd907ae4SEugenio Pérez } 816bd907ae4SEugenio Pérez 817bd907ae4SEugenio Pérez static const VhostShadowVirtqueueOps vhost_vdpa_net_svq_ops = { 818bd907ae4SEugenio Pérez .avail_handler = vhost_vdpa_net_handle_ctrl_avail, 819bd907ae4SEugenio Pérez }; 820bd907ae4SEugenio Pérez 821152128d6SEugenio Pérez /** 822152128d6SEugenio Pérez * Probe if CVQ is isolated 823152128d6SEugenio Pérez * 824152128d6SEugenio Pérez * @device_fd The vdpa device fd 825152128d6SEugenio Pérez * @features Features offered by the device. 826152128d6SEugenio Pérez * @cvq_index The control vq pair index 827152128d6SEugenio Pérez * 828152128d6SEugenio Pérez * Returns <0 in case of failure, 0 if false and 1 if true. 829152128d6SEugenio Pérez */ 830152128d6SEugenio Pérez static int vhost_vdpa_probe_cvq_isolation(int device_fd, uint64_t features, 831152128d6SEugenio Pérez int cvq_index, Error **errp) 832152128d6SEugenio Pérez { 833152128d6SEugenio Pérez uint64_t backend_features; 834152128d6SEugenio Pérez int64_t cvq_group; 835152128d6SEugenio Pérez uint8_t status = VIRTIO_CONFIG_S_ACKNOWLEDGE | 836152128d6SEugenio Pérez VIRTIO_CONFIG_S_DRIVER | 837152128d6SEugenio Pérez VIRTIO_CONFIG_S_FEATURES_OK; 838152128d6SEugenio Pérez int r; 839152128d6SEugenio Pérez 840152128d6SEugenio Pérez ERRP_GUARD(); 841152128d6SEugenio Pérez 842152128d6SEugenio Pérez r = ioctl(device_fd, VHOST_GET_BACKEND_FEATURES, &backend_features); 843152128d6SEugenio Pérez if (unlikely(r < 0)) { 844152128d6SEugenio Pérez error_setg_errno(errp, errno, "Cannot get vdpa backend_features"); 845152128d6SEugenio Pérez return r; 846152128d6SEugenio Pérez } 847152128d6SEugenio Pérez 848152128d6SEugenio Pérez if (!(backend_features & BIT_ULL(VHOST_BACKEND_F_IOTLB_ASID))) { 849152128d6SEugenio Pérez return 0; 850152128d6SEugenio Pérez } 851152128d6SEugenio Pérez 852152128d6SEugenio Pérez r = ioctl(device_fd, VHOST_SET_FEATURES, &features); 853152128d6SEugenio Pérez if (unlikely(r)) { 854152128d6SEugenio Pérez error_setg_errno(errp, errno, "Cannot set features"); 855152128d6SEugenio Pérez } 856152128d6SEugenio Pérez 857152128d6SEugenio Pérez r = ioctl(device_fd, VHOST_VDPA_SET_STATUS, &status); 858152128d6SEugenio Pérez if (unlikely(r)) { 859152128d6SEugenio Pérez error_setg_errno(errp, -r, "Cannot set device features"); 860152128d6SEugenio Pérez goto out; 861152128d6SEugenio Pérez } 862152128d6SEugenio Pérez 863152128d6SEugenio Pérez cvq_group = vhost_vdpa_get_vring_group(device_fd, cvq_index, errp); 864152128d6SEugenio Pérez if (unlikely(cvq_group < 0)) { 865152128d6SEugenio Pérez if (cvq_group != -ENOTSUP) { 866152128d6SEugenio Pérez r = cvq_group; 867152128d6SEugenio Pérez goto out; 868152128d6SEugenio Pérez } 869152128d6SEugenio Pérez 870152128d6SEugenio Pérez /* 871152128d6SEugenio Pérez * The kernel report VHOST_BACKEND_F_IOTLB_ASID if the vdpa frontend 872152128d6SEugenio Pérez * support ASID even if the parent driver does not. The CVQ cannot be 873152128d6SEugenio Pérez * isolated in this case. 874152128d6SEugenio Pérez */ 875152128d6SEugenio Pérez error_free(*errp); 876152128d6SEugenio Pérez *errp = NULL; 877152128d6SEugenio Pérez r = 0; 878152128d6SEugenio Pérez goto out; 879152128d6SEugenio Pérez } 880152128d6SEugenio Pérez 881152128d6SEugenio Pérez for (int i = 0; i < cvq_index; ++i) { 882152128d6SEugenio Pérez int64_t group = vhost_vdpa_get_vring_group(device_fd, i, errp); 883152128d6SEugenio Pérez if (unlikely(group < 0)) { 884152128d6SEugenio Pérez r = group; 885152128d6SEugenio Pérez goto out; 886152128d6SEugenio Pérez } 887152128d6SEugenio Pérez 888152128d6SEugenio Pérez if (group == (int64_t)cvq_group) { 889152128d6SEugenio Pérez r = 0; 890152128d6SEugenio Pérez goto out; 891152128d6SEugenio Pérez } 892152128d6SEugenio Pérez } 893152128d6SEugenio Pérez 894152128d6SEugenio Pérez r = 1; 895152128d6SEugenio Pérez 896152128d6SEugenio Pérez out: 897152128d6SEugenio Pérez status = 0; 898152128d6SEugenio Pérez ioctl(device_fd, VHOST_VDPA_SET_STATUS, &status); 899152128d6SEugenio Pérez return r; 900152128d6SEugenio Pérez } 901152128d6SEugenio Pérez 902654790b6SJason Wang static NetClientState *net_vhost_vdpa_init(NetClientState *peer, 903654790b6SJason Wang const char *device, 904654790b6SJason Wang const char *name, 90540237840SJason Wang int vdpa_device_fd, 90640237840SJason Wang int queue_pair_index, 90740237840SJason Wang int nvqs, 9081576dbb5SEugenio Pérez bool is_datapath, 9091576dbb5SEugenio Pérez bool svq, 9105c1ebd4cSEugenio Pérez struct vhost_vdpa_iova_range iova_range, 911152128d6SEugenio Pérez uint64_t features, 912152128d6SEugenio Pérez Error **errp) 9131e0a84eaSCindy Lu { 9141e0a84eaSCindy Lu NetClientState *nc = NULL; 9151e0a84eaSCindy Lu VhostVDPAState *s; 9161e0a84eaSCindy Lu int ret = 0; 9171e0a84eaSCindy Lu assert(name); 918152128d6SEugenio Pérez int cvq_isolated; 919152128d6SEugenio Pérez 92040237840SJason Wang if (is_datapath) { 92140237840SJason Wang nc = qemu_new_net_client(&net_vhost_vdpa_info, peer, device, 92240237840SJason Wang name); 92340237840SJason Wang } else { 924152128d6SEugenio Pérez cvq_isolated = vhost_vdpa_probe_cvq_isolation(vdpa_device_fd, features, 925152128d6SEugenio Pérez queue_pair_index * 2, 926152128d6SEugenio Pérez errp); 927152128d6SEugenio Pérez if (unlikely(cvq_isolated < 0)) { 928152128d6SEugenio Pérez return NULL; 929152128d6SEugenio Pérez } 930152128d6SEugenio Pérez 931f8972b56SEugenio Pérez nc = qemu_new_net_control_client(&net_vhost_vdpa_cvq_info, peer, 93240237840SJason Wang device, name); 93340237840SJason Wang } 93453b85d95SLaurent Vivier qemu_set_info_str(nc, TYPE_VHOST_VDPA); 9351e0a84eaSCindy Lu s = DO_UPCAST(VhostVDPAState, nc, nc); 9367327813dSJason Wang 9371e0a84eaSCindy Lu s->vhost_vdpa.device_fd = vdpa_device_fd; 93840237840SJason Wang s->vhost_vdpa.index = queue_pair_index; 9397f211a28SEugenio Pérez s->always_svq = svq; 94069498430SEugenio Pérez s->migration_state.notify = vdpa_net_migration_state_notifier; 9411576dbb5SEugenio Pérez s->vhost_vdpa.shadow_vqs_enabled = svq; 942a585fad2SEugenio Pérez s->vhost_vdpa.iova_range = iova_range; 9436188d78aSEugenio Pérez s->vhost_vdpa.shadow_data = svq; 9445c1ebd4cSEugenio Pérez if (queue_pair_index == 0) { 9455c1ebd4cSEugenio Pérez vhost_vdpa_net_valid_svq_features(features, 9465c1ebd4cSEugenio Pérez &s->vhost_vdpa.migration_blocker); 9475c1ebd4cSEugenio Pérez } else if (!is_datapath) { 948babf8b87SEugenio Pérez s->cvq_cmd_out_buffer = mmap(NULL, vhost_vdpa_net_cvq_cmd_page_len(), 949babf8b87SEugenio Pérez PROT_READ | PROT_WRITE, 950babf8b87SEugenio Pérez MAP_SHARED | MAP_ANONYMOUS, -1, 0); 951babf8b87SEugenio Pérez s->status = mmap(NULL, vhost_vdpa_net_cvq_cmd_page_len(), 952babf8b87SEugenio Pérez PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 953babf8b87SEugenio Pérez -1, 0); 9542df4dd31SEugenio Pérez 955bd907ae4SEugenio Pérez s->vhost_vdpa.shadow_vq_ops = &vhost_vdpa_net_svq_ops; 956bd907ae4SEugenio Pérez s->vhost_vdpa.shadow_vq_ops_opaque = s; 957152128d6SEugenio Pérez s->cvq_isolated = cvq_isolated; 9589c363cf6SEugenio Pérez 9599c363cf6SEugenio Pérez /* 9608bc0049eSEugenio Pérez * TODO: We cannot migrate devices with CVQ and no x-svq enabled as 9618bc0049eSEugenio Pérez * there is no way to set the device state (MAC, MQ, etc) before 9628bc0049eSEugenio Pérez * starting the datapath. 9639c363cf6SEugenio Pérez * 9649c363cf6SEugenio Pérez * Migration blocker ownership now belongs to s->vhost_vdpa. 9659c363cf6SEugenio Pérez */ 9668bc0049eSEugenio Pérez if (!svq) { 9679c363cf6SEugenio Pérez error_setg(&s->vhost_vdpa.migration_blocker, 9689c363cf6SEugenio Pérez "net vdpa cannot migrate with CVQ feature"); 969bd907ae4SEugenio Pérez } 9708bc0049eSEugenio Pérez } 97140237840SJason Wang ret = vhost_vdpa_add(nc, (void *)&s->vhost_vdpa, queue_pair_index, nvqs); 97274af5eecSJason Wang if (ret) { 97374af5eecSJason Wang qemu_del_net_client(nc); 974654790b6SJason Wang return NULL; 97574af5eecSJason Wang } 976654790b6SJason Wang return nc; 9771e0a84eaSCindy Lu } 9781e0a84eaSCindy Lu 9798170ab3fSEugenio Pérez static int vhost_vdpa_get_features(int fd, uint64_t *features, Error **errp) 9808170ab3fSEugenio Pérez { 9818170ab3fSEugenio Pérez int ret = ioctl(fd, VHOST_GET_FEATURES, features); 9828170ab3fSEugenio Pérez if (unlikely(ret < 0)) { 9838170ab3fSEugenio Pérez error_setg_errno(errp, errno, 9848170ab3fSEugenio Pérez "Fail to query features from vhost-vDPA device"); 9858170ab3fSEugenio Pérez } 9868170ab3fSEugenio Pérez return ret; 9878170ab3fSEugenio Pérez } 9888170ab3fSEugenio Pérez 9898170ab3fSEugenio Pérez static int vhost_vdpa_get_max_queue_pairs(int fd, uint64_t features, 9908170ab3fSEugenio Pérez int *has_cvq, Error **errp) 99140237840SJason Wang { 99240237840SJason Wang unsigned long config_size = offsetof(struct vhost_vdpa_config, buf); 993cd523a41SStefano Garzarella g_autofree struct vhost_vdpa_config *config = NULL; 99440237840SJason Wang __virtio16 *max_queue_pairs; 99540237840SJason Wang int ret; 99640237840SJason Wang 99740237840SJason Wang if (features & (1 << VIRTIO_NET_F_CTRL_VQ)) { 99840237840SJason Wang *has_cvq = 1; 99940237840SJason Wang } else { 100040237840SJason Wang *has_cvq = 0; 100140237840SJason Wang } 100240237840SJason Wang 100340237840SJason Wang if (features & (1 << VIRTIO_NET_F_MQ)) { 100440237840SJason Wang config = g_malloc0(config_size + sizeof(*max_queue_pairs)); 100540237840SJason Wang config->off = offsetof(struct virtio_net_config, max_virtqueue_pairs); 100640237840SJason Wang config->len = sizeof(*max_queue_pairs); 100740237840SJason Wang 100840237840SJason Wang ret = ioctl(fd, VHOST_VDPA_GET_CONFIG, config); 100940237840SJason Wang if (ret) { 101040237840SJason Wang error_setg(errp, "Fail to get config from vhost-vDPA device"); 101140237840SJason Wang return -ret; 101240237840SJason Wang } 101340237840SJason Wang 101440237840SJason Wang max_queue_pairs = (__virtio16 *)&config->buf; 101540237840SJason Wang 101640237840SJason Wang return lduw_le_p(max_queue_pairs); 101740237840SJason Wang } 101840237840SJason Wang 101940237840SJason Wang return 1; 102040237840SJason Wang } 102140237840SJason Wang 10221e0a84eaSCindy Lu int net_init_vhost_vdpa(const Netdev *netdev, const char *name, 10231e0a84eaSCindy Lu NetClientState *peer, Error **errp) 10241e0a84eaSCindy Lu { 10251e0a84eaSCindy Lu const NetdevVhostVDPAOptions *opts; 10268170ab3fSEugenio Pérez uint64_t features; 1027654790b6SJason Wang int vdpa_device_fd; 1028eb3cb751SEugenio Pérez g_autofree NetClientState **ncs = NULL; 1029a585fad2SEugenio Pérez struct vhost_vdpa_iova_range iova_range; 1030eb3cb751SEugenio Pérez NetClientState *nc; 1031aed5da45SEugenio Pérez int queue_pairs, r, i = 0, has_cvq = 0; 10321e0a84eaSCindy Lu 10331e0a84eaSCindy Lu assert(netdev->type == NET_CLIENT_DRIVER_VHOST_VDPA); 10341e0a84eaSCindy Lu opts = &netdev->u.vhost_vdpa; 10357480874aSMarkus Armbruster if (!opts->vhostdev && !opts->vhostfd) { 10368801ccd0SSi-Wei Liu error_setg(errp, 10378801ccd0SSi-Wei Liu "vhost-vdpa: neither vhostdev= nor vhostfd= was specified"); 1038c8295404SEugenio Pérez return -1; 1039c8295404SEugenio Pérez } 10407327813dSJason Wang 10417480874aSMarkus Armbruster if (opts->vhostdev && opts->vhostfd) { 10428801ccd0SSi-Wei Liu error_setg(errp, 10438801ccd0SSi-Wei Liu "vhost-vdpa: vhostdev= and vhostfd= are mutually exclusive"); 10448801ccd0SSi-Wei Liu return -1; 10458801ccd0SSi-Wei Liu } 10468801ccd0SSi-Wei Liu 10477480874aSMarkus Armbruster if (opts->vhostdev) { 10480351152bSEugenio Pérez vdpa_device_fd = qemu_open(opts->vhostdev, O_RDWR, errp); 10497327813dSJason Wang if (vdpa_device_fd == -1) { 10507327813dSJason Wang return -errno; 10517327813dSJason Wang } 10525107fd3eSPeter Maydell } else { 10535107fd3eSPeter Maydell /* has_vhostfd */ 10548801ccd0SSi-Wei Liu vdpa_device_fd = monitor_fd_param(monitor_cur(), opts->vhostfd, errp); 10558801ccd0SSi-Wei Liu if (vdpa_device_fd == -1) { 10568801ccd0SSi-Wei Liu error_prepend(errp, "vhost-vdpa: unable to parse vhostfd: "); 10578801ccd0SSi-Wei Liu return -1; 10588801ccd0SSi-Wei Liu } 10598801ccd0SSi-Wei Liu } 10607327813dSJason Wang 10618170ab3fSEugenio Pérez r = vhost_vdpa_get_features(vdpa_device_fd, &features, errp); 10628170ab3fSEugenio Pérez if (unlikely(r < 0)) { 1063aed5da45SEugenio Pérez goto err; 10648170ab3fSEugenio Pérez } 10658170ab3fSEugenio Pérez 10668170ab3fSEugenio Pérez queue_pairs = vhost_vdpa_get_max_queue_pairs(vdpa_device_fd, features, 106740237840SJason Wang &has_cvq, errp); 106840237840SJason Wang if (queue_pairs < 0) { 10697327813dSJason Wang qemu_close(vdpa_device_fd); 107040237840SJason Wang return queue_pairs; 10717327813dSJason Wang } 10727327813dSJason Wang 1073bf7a2ad8SLongpeng r = vhost_vdpa_get_iova_range(vdpa_device_fd, &iova_range); 1074bf7a2ad8SLongpeng if (unlikely(r < 0)) { 1075bf7a2ad8SLongpeng error_setg(errp, "vhost-vdpa: get iova range failed: %s", 1076bf7a2ad8SLongpeng strerror(-r)); 1077bf7a2ad8SLongpeng goto err; 1078bf7a2ad8SLongpeng } 1079bf7a2ad8SLongpeng 108000ef422eSEugenio Pérez if (opts->x_svq && !vhost_vdpa_net_valid_svq_features(features, errp)) { 108100ef422eSEugenio Pérez goto err; 10821576dbb5SEugenio Pérez } 10831576dbb5SEugenio Pérez 108440237840SJason Wang ncs = g_malloc0(sizeof(*ncs) * queue_pairs); 108540237840SJason Wang 108640237840SJason Wang for (i = 0; i < queue_pairs; i++) { 108740237840SJason Wang ncs[i] = net_vhost_vdpa_init(peer, TYPE_VHOST_VDPA, name, 10881576dbb5SEugenio Pérez vdpa_device_fd, i, 2, true, opts->x_svq, 1089152128d6SEugenio Pérez iova_range, features, errp); 109040237840SJason Wang if (!ncs[i]) 109140237840SJason Wang goto err; 109240237840SJason Wang } 109340237840SJason Wang 109440237840SJason Wang if (has_cvq) { 109540237840SJason Wang nc = net_vhost_vdpa_init(peer, TYPE_VHOST_VDPA, name, 10961576dbb5SEugenio Pérez vdpa_device_fd, i, 1, false, 1097152128d6SEugenio Pérez opts->x_svq, iova_range, features, errp); 109840237840SJason Wang if (!nc) 109940237840SJason Wang goto err; 110040237840SJason Wang } 110140237840SJason Wang 1102654790b6SJason Wang return 0; 110340237840SJason Wang 110440237840SJason Wang err: 110540237840SJason Wang if (i) { 11069bd05507SSi-Wei Liu for (i--; i >= 0; i--) { 11079bd05507SSi-Wei Liu qemu_del_net_client(ncs[i]); 11089bd05507SSi-Wei Liu } 110940237840SJason Wang } 11101576dbb5SEugenio Pérez 111140237840SJason Wang qemu_close(vdpa_device_fd); 111240237840SJason Wang 111340237840SJason Wang return -1; 11141e0a84eaSCindy Lu } 1115