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, 611e0a84eaSCindy Lu VIRTIO_NET_F_GSO, 621e0a84eaSCindy Lu VIRTIO_NET_F_GUEST_TSO4, 631e0a84eaSCindy Lu VIRTIO_NET_F_GUEST_TSO6, 641e0a84eaSCindy Lu VIRTIO_NET_F_GUEST_ECN, 651e0a84eaSCindy Lu VIRTIO_NET_F_GUEST_UFO, 661e0a84eaSCindy Lu VIRTIO_NET_F_HOST_TSO4, 671e0a84eaSCindy Lu VIRTIO_NET_F_HOST_TSO6, 681e0a84eaSCindy Lu VIRTIO_NET_F_HOST_ECN, 691e0a84eaSCindy Lu VIRTIO_NET_F_HOST_UFO, 701e0a84eaSCindy Lu VIRTIO_NET_F_MRG_RXBUF, 711e0a84eaSCindy Lu VIRTIO_NET_F_MTU, 7240237840SJason Wang VIRTIO_NET_F_CTRL_RX, 7340237840SJason Wang VIRTIO_NET_F_CTRL_RX_EXTRA, 7440237840SJason Wang VIRTIO_NET_F_CTRL_VLAN, 7540237840SJason Wang VIRTIO_NET_F_CTRL_MAC_ADDR, 7640237840SJason Wang VIRTIO_NET_F_RSS, 7740237840SJason Wang VIRTIO_NET_F_MQ, 7840237840SJason Wang VIRTIO_NET_F_CTRL_VQ, 791e0a84eaSCindy Lu VIRTIO_F_IOMMU_PLATFORM, 801e0a84eaSCindy Lu VIRTIO_F_RING_PACKED, 81562a7d23SStefano Garzarella VIRTIO_F_RING_RESET, 820145c393SAndrew Melnychenko VIRTIO_NET_F_RSS, 830145c393SAndrew Melnychenko VIRTIO_NET_F_HASH_REPORT, 849aa47eddSSi-Wei Liu VIRTIO_NET_F_STATUS, 851e0a84eaSCindy Lu VHOST_INVALID_FEATURE_BIT 861e0a84eaSCindy Lu }; 871e0a84eaSCindy Lu 881576dbb5SEugenio Pérez /** Supported device specific feature bits with SVQ */ 891576dbb5SEugenio Pérez static const uint64_t vdpa_svq_device_features = 901576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_CSUM) | 911576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_GUEST_CSUM) | 92*4b4a1378SHawkins Jiawei BIT_ULL(VIRTIO_NET_F_CTRL_GUEST_OFFLOADS) | 931576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_MTU) | 941576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_MAC) | 951576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_GUEST_TSO4) | 961576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_GUEST_TSO6) | 971576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_GUEST_ECN) | 981576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_GUEST_UFO) | 991576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_HOST_TSO4) | 1001576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_HOST_TSO6) | 1011576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_HOST_ECN) | 1021576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_HOST_UFO) | 1031576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_MRG_RXBUF) | 1041576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_STATUS) | 1051576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_CTRL_VQ) | 10672b99a87SEugenio Pérez BIT_ULL(VIRTIO_NET_F_MQ) | 1071576dbb5SEugenio Pérez BIT_ULL(VIRTIO_F_ANY_LAYOUT) | 1081576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_CTRL_MAC_ADDR) | 109609ab4c3SEugenio Pérez /* VHOST_F_LOG_ALL is exposed by SVQ */ 110609ab4c3SEugenio Pérez BIT_ULL(VHOST_F_LOG_ALL) | 1111576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_RSC_EXT) | 1120d74e2b7SEugenio Pérez BIT_ULL(VIRTIO_NET_F_STANDBY) | 1130d74e2b7SEugenio Pérez BIT_ULL(VIRTIO_NET_F_SPEED_DUPLEX); 1141576dbb5SEugenio Pérez 115c1a10086SEugenio Pérez #define VHOST_VDPA_NET_CVQ_ASID 1 116c1a10086SEugenio Pérez 1171e0a84eaSCindy Lu VHostNetState *vhost_vdpa_get_vhost_net(NetClientState *nc) 1181e0a84eaSCindy Lu { 1191e0a84eaSCindy Lu VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); 1201e0a84eaSCindy Lu assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 1211e0a84eaSCindy Lu return s->vhost_net; 1221e0a84eaSCindy Lu } 1231e0a84eaSCindy Lu 124915bf6ccSEugenio Pérez static size_t vhost_vdpa_net_cvq_cmd_len(void) 125915bf6ccSEugenio Pérez { 126915bf6ccSEugenio Pérez /* 127915bf6ccSEugenio Pérez * MAC_TABLE_SET is the ctrl command that produces the longer out buffer. 128915bf6ccSEugenio Pérez * In buffer is always 1 byte, so it should fit here 129915bf6ccSEugenio Pérez */ 130915bf6ccSEugenio Pérez return sizeof(struct virtio_net_ctrl_hdr) + 131915bf6ccSEugenio Pérez 2 * sizeof(struct virtio_net_ctrl_mac) + 132915bf6ccSEugenio Pérez MAC_TABLE_ENTRIES * ETH_ALEN; 133915bf6ccSEugenio Pérez } 134915bf6ccSEugenio Pérez 135915bf6ccSEugenio Pérez static size_t vhost_vdpa_net_cvq_cmd_page_len(void) 136915bf6ccSEugenio Pérez { 137915bf6ccSEugenio Pérez return ROUND_UP(vhost_vdpa_net_cvq_cmd_len(), qemu_real_host_page_size()); 138915bf6ccSEugenio Pérez } 139915bf6ccSEugenio Pérez 14036e46472SEugenio Pérez static bool vhost_vdpa_net_valid_svq_features(uint64_t features, Error **errp) 14136e46472SEugenio Pérez { 14236e46472SEugenio Pérez uint64_t invalid_dev_features = 14336e46472SEugenio Pérez features & ~vdpa_svq_device_features & 14436e46472SEugenio Pérez /* Transport are all accepted at this point */ 14536e46472SEugenio Pérez ~MAKE_64BIT_MASK(VIRTIO_TRANSPORT_F_START, 14636e46472SEugenio Pérez VIRTIO_TRANSPORT_F_END - VIRTIO_TRANSPORT_F_START); 14736e46472SEugenio Pérez 14836e46472SEugenio Pérez if (invalid_dev_features) { 14936e46472SEugenio Pérez error_setg(errp, "vdpa svq does not work with features 0x%" PRIx64, 15036e46472SEugenio Pérez invalid_dev_features); 151258a0394SEugenio Pérez return false; 15236e46472SEugenio Pérez } 15336e46472SEugenio Pérez 154258a0394SEugenio Pérez return vhost_svq_valid_features(features, errp); 15536e46472SEugenio Pérez } 15636e46472SEugenio Pérez 1571e0a84eaSCindy Lu static int vhost_vdpa_net_check_device_id(struct vhost_net *net) 1581e0a84eaSCindy Lu { 1591e0a84eaSCindy Lu uint32_t device_id; 1601e0a84eaSCindy Lu int ret; 1611e0a84eaSCindy Lu struct vhost_dev *hdev; 1621e0a84eaSCindy Lu 1631e0a84eaSCindy Lu hdev = (struct vhost_dev *)&net->dev; 1641e0a84eaSCindy Lu ret = hdev->vhost_ops->vhost_get_device_id(hdev, &device_id); 1651e0a84eaSCindy Lu if (device_id != VIRTIO_ID_NET) { 1661e0a84eaSCindy Lu return -ENOTSUP; 1671e0a84eaSCindy Lu } 1681e0a84eaSCindy Lu return ret; 1691e0a84eaSCindy Lu } 1701e0a84eaSCindy Lu 17140237840SJason Wang static int vhost_vdpa_add(NetClientState *ncs, void *be, 17240237840SJason Wang int queue_pair_index, int nvqs) 1731e0a84eaSCindy Lu { 1741e0a84eaSCindy Lu VhostNetOptions options; 1751e0a84eaSCindy Lu struct vhost_net *net = NULL; 1761e0a84eaSCindy Lu VhostVDPAState *s; 1771e0a84eaSCindy Lu int ret; 1781e0a84eaSCindy Lu 1791e0a84eaSCindy Lu options.backend_type = VHOST_BACKEND_TYPE_VDPA; 1801e0a84eaSCindy Lu assert(ncs->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 1811e0a84eaSCindy Lu s = DO_UPCAST(VhostVDPAState, nc, ncs); 1821e0a84eaSCindy Lu options.net_backend = ncs; 1831e0a84eaSCindy Lu options.opaque = be; 1841e0a84eaSCindy Lu options.busyloop_timeout = 0; 18540237840SJason Wang options.nvqs = nvqs; 1861e0a84eaSCindy Lu 1871e0a84eaSCindy Lu net = vhost_net_init(&options); 1881e0a84eaSCindy Lu if (!net) { 1891e0a84eaSCindy Lu error_report("failed to init vhost_net for queue"); 190a97ef87aSJason Wang goto err_init; 1911e0a84eaSCindy Lu } 1921e0a84eaSCindy Lu s->vhost_net = net; 1931e0a84eaSCindy Lu ret = vhost_vdpa_net_check_device_id(net); 1941e0a84eaSCindy Lu if (ret) { 195a97ef87aSJason Wang goto err_check; 1961e0a84eaSCindy Lu } 1971e0a84eaSCindy Lu return 0; 198a97ef87aSJason Wang err_check: 1991e0a84eaSCindy Lu vhost_net_cleanup(net); 200ab36edcfSJason Wang g_free(net); 201a97ef87aSJason Wang err_init: 2021e0a84eaSCindy Lu return -1; 2031e0a84eaSCindy Lu } 2041e0a84eaSCindy Lu 2051e0a84eaSCindy Lu static void vhost_vdpa_cleanup(NetClientState *nc) 2061e0a84eaSCindy Lu { 2071e0a84eaSCindy Lu VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); 2081e0a84eaSCindy Lu 209babf8b87SEugenio Pérez munmap(s->cvq_cmd_out_buffer, vhost_vdpa_net_cvq_cmd_page_len()); 210babf8b87SEugenio Pérez munmap(s->status, vhost_vdpa_net_cvq_cmd_page_len()); 2111e0a84eaSCindy Lu if (s->vhost_net) { 2121e0a84eaSCindy Lu vhost_net_cleanup(s->vhost_net); 2131e0a84eaSCindy Lu g_free(s->vhost_net); 2141e0a84eaSCindy Lu s->vhost_net = NULL; 2151e0a84eaSCindy Lu } 21657b3a7d8SCindy Lu if (s->vhost_vdpa.device_fd >= 0) { 21757b3a7d8SCindy Lu qemu_close(s->vhost_vdpa.device_fd); 21857b3a7d8SCindy Lu s->vhost_vdpa.device_fd = -1; 21957b3a7d8SCindy Lu } 2201e0a84eaSCindy Lu } 2211e0a84eaSCindy Lu 2221e0a84eaSCindy Lu static bool vhost_vdpa_has_vnet_hdr(NetClientState *nc) 2231e0a84eaSCindy Lu { 2241e0a84eaSCindy Lu assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 2251e0a84eaSCindy Lu 2261e0a84eaSCindy Lu return true; 2271e0a84eaSCindy Lu } 2281e0a84eaSCindy Lu 2291e0a84eaSCindy Lu static bool vhost_vdpa_has_ufo(NetClientState *nc) 2301e0a84eaSCindy Lu { 2311e0a84eaSCindy Lu assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 2321e0a84eaSCindy Lu VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); 2331e0a84eaSCindy Lu uint64_t features = 0; 2341e0a84eaSCindy Lu features |= (1ULL << VIRTIO_NET_F_HOST_UFO); 2351e0a84eaSCindy Lu features = vhost_net_get_features(s->vhost_net, features); 2361e0a84eaSCindy Lu return !!(features & (1ULL << VIRTIO_NET_F_HOST_UFO)); 2371e0a84eaSCindy Lu 2381e0a84eaSCindy Lu } 2391e0a84eaSCindy Lu 240ee8a1c63SKevin Wolf static bool vhost_vdpa_check_peer_type(NetClientState *nc, ObjectClass *oc, 241ee8a1c63SKevin Wolf Error **errp) 242ee8a1c63SKevin Wolf { 243ee8a1c63SKevin Wolf const char *driver = object_class_get_name(oc); 244ee8a1c63SKevin Wolf 245ee8a1c63SKevin Wolf if (!g_str_has_prefix(driver, "virtio-net-")) { 246ee8a1c63SKevin Wolf error_setg(errp, "vhost-vdpa requires frontend driver virtio-net-*"); 247ee8a1c63SKevin Wolf return false; 248ee8a1c63SKevin Wolf } 249ee8a1c63SKevin Wolf 250ee8a1c63SKevin Wolf return true; 251ee8a1c63SKevin Wolf } 252ee8a1c63SKevin Wolf 253846a1e85SEugenio Pérez /** Dummy receive in case qemu falls back to userland tap networking */ 254846a1e85SEugenio Pérez static ssize_t vhost_vdpa_receive(NetClientState *nc, const uint8_t *buf, 255846a1e85SEugenio Pérez size_t size) 256846a1e85SEugenio Pérez { 257bc5add1dSSi-Wei Liu return size; 258846a1e85SEugenio Pérez } 259846a1e85SEugenio Pérez 26000ef422eSEugenio Pérez /** From any vdpa net client, get the netclient of the first queue pair */ 26100ef422eSEugenio Pérez static VhostVDPAState *vhost_vdpa_net_first_nc_vdpa(VhostVDPAState *s) 26200ef422eSEugenio Pérez { 26300ef422eSEugenio Pérez NICState *nic = qemu_get_nic(s->nc.peer); 26400ef422eSEugenio Pérez NetClientState *nc0 = qemu_get_peer(nic->ncs, 0); 26500ef422eSEugenio Pérez 26600ef422eSEugenio Pérez return DO_UPCAST(VhostVDPAState, nc, nc0); 26700ef422eSEugenio Pérez } 26800ef422eSEugenio Pérez 26969498430SEugenio Pérez static void vhost_vdpa_net_log_global_enable(VhostVDPAState *s, bool enable) 27069498430SEugenio Pérez { 27169498430SEugenio Pérez struct vhost_vdpa *v = &s->vhost_vdpa; 27269498430SEugenio Pérez VirtIONet *n; 27369498430SEugenio Pérez VirtIODevice *vdev; 27469498430SEugenio Pérez int data_queue_pairs, cvq, r; 27569498430SEugenio Pérez 27669498430SEugenio Pérez /* We are only called on the first data vqs and only if x-svq is not set */ 27769498430SEugenio Pérez if (s->vhost_vdpa.shadow_vqs_enabled == enable) { 27869498430SEugenio Pérez return; 27969498430SEugenio Pérez } 28069498430SEugenio Pérez 28169498430SEugenio Pérez vdev = v->dev->vdev; 28269498430SEugenio Pérez n = VIRTIO_NET(vdev); 28369498430SEugenio Pérez if (!n->vhost_started) { 28469498430SEugenio Pérez return; 28569498430SEugenio Pérez } 28669498430SEugenio Pérez 28769498430SEugenio Pérez data_queue_pairs = n->multiqueue ? n->max_queue_pairs : 1; 28869498430SEugenio Pérez cvq = virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ) ? 28969498430SEugenio Pérez n->max_ncs - n->max_queue_pairs : 0; 29069498430SEugenio Pérez /* 29169498430SEugenio Pérez * TODO: vhost_net_stop does suspend, get_base and reset. We can be smarter 29269498430SEugenio Pérez * in the future and resume the device if read-only operations between 29369498430SEugenio Pérez * suspend and reset goes wrong. 29469498430SEugenio Pérez */ 29569498430SEugenio Pérez vhost_net_stop(vdev, n->nic->ncs, data_queue_pairs, cvq); 29669498430SEugenio Pérez 29769498430SEugenio Pérez /* Start will check migration setup_or_active to configure or not SVQ */ 29869498430SEugenio Pérez r = vhost_net_start(vdev, n->nic->ncs, data_queue_pairs, cvq); 29969498430SEugenio Pérez if (unlikely(r < 0)) { 30069498430SEugenio Pérez error_report("unable to start vhost net: %s(%d)", g_strerror(-r), -r); 30169498430SEugenio Pérez } 30269498430SEugenio Pérez } 30369498430SEugenio Pérez 30469498430SEugenio Pérez static void vdpa_net_migration_state_notifier(Notifier *notifier, void *data) 30569498430SEugenio Pérez { 30669498430SEugenio Pérez MigrationState *migration = data; 30769498430SEugenio Pérez VhostVDPAState *s = container_of(notifier, VhostVDPAState, 30869498430SEugenio Pérez migration_state); 30969498430SEugenio Pérez 31069498430SEugenio Pérez if (migration_in_setup(migration)) { 31169498430SEugenio Pérez vhost_vdpa_net_log_global_enable(s, true); 31269498430SEugenio Pérez } else if (migration_has_failed(migration)) { 31369498430SEugenio Pérez vhost_vdpa_net_log_global_enable(s, false); 31469498430SEugenio Pérez } 31569498430SEugenio Pérez } 31669498430SEugenio Pérez 31700ef422eSEugenio Pérez static void vhost_vdpa_net_data_start_first(VhostVDPAState *s) 31800ef422eSEugenio Pérez { 31900ef422eSEugenio Pérez struct vhost_vdpa *v = &s->vhost_vdpa; 32000ef422eSEugenio Pérez 32169498430SEugenio Pérez add_migration_state_change_notifier(&s->migration_state); 32200ef422eSEugenio Pérez if (v->shadow_vqs_enabled) { 32300ef422eSEugenio Pérez v->iova_tree = vhost_iova_tree_new(v->iova_range.first, 32400ef422eSEugenio Pérez v->iova_range.last); 32500ef422eSEugenio Pérez } 32600ef422eSEugenio Pérez } 32700ef422eSEugenio Pérez 32800ef422eSEugenio Pérez static int vhost_vdpa_net_data_start(NetClientState *nc) 32900ef422eSEugenio Pérez { 33000ef422eSEugenio Pérez VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); 33100ef422eSEugenio Pérez struct vhost_vdpa *v = &s->vhost_vdpa; 33200ef422eSEugenio Pérez 33300ef422eSEugenio Pérez assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 33400ef422eSEugenio Pérez 33569498430SEugenio Pérez if (s->always_svq || 33669498430SEugenio Pérez migration_is_setup_or_active(migrate_get_current()->state)) { 33769498430SEugenio Pérez v->shadow_vqs_enabled = true; 33869498430SEugenio Pérez v->shadow_data = true; 33969498430SEugenio Pérez } else { 34069498430SEugenio Pérez v->shadow_vqs_enabled = false; 34169498430SEugenio Pérez v->shadow_data = false; 34269498430SEugenio Pérez } 34369498430SEugenio Pérez 34400ef422eSEugenio Pérez if (v->index == 0) { 34500ef422eSEugenio Pérez vhost_vdpa_net_data_start_first(s); 34600ef422eSEugenio Pérez return 0; 34700ef422eSEugenio Pérez } 34800ef422eSEugenio Pérez 34900ef422eSEugenio Pérez if (v->shadow_vqs_enabled) { 35000ef422eSEugenio Pérez VhostVDPAState *s0 = vhost_vdpa_net_first_nc_vdpa(s); 35100ef422eSEugenio Pérez v->iova_tree = s0->vhost_vdpa.iova_tree; 35200ef422eSEugenio Pérez } 35300ef422eSEugenio Pérez 35400ef422eSEugenio Pérez return 0; 35500ef422eSEugenio Pérez } 35600ef422eSEugenio Pérez 35700ef422eSEugenio Pérez static void vhost_vdpa_net_client_stop(NetClientState *nc) 35800ef422eSEugenio Pérez { 35900ef422eSEugenio Pérez VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); 36000ef422eSEugenio Pérez struct vhost_dev *dev; 36100ef422eSEugenio Pérez 36200ef422eSEugenio Pérez assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 36300ef422eSEugenio Pérez 36469498430SEugenio Pérez if (s->vhost_vdpa.index == 0) { 36569498430SEugenio Pérez remove_migration_state_change_notifier(&s->migration_state); 36669498430SEugenio Pérez } 36769498430SEugenio Pérez 36800ef422eSEugenio Pérez dev = s->vhost_vdpa.dev; 36900ef422eSEugenio Pérez if (dev->vq_index + dev->nvqs == dev->vq_index_end) { 37000ef422eSEugenio Pérez g_clear_pointer(&s->vhost_vdpa.iova_tree, vhost_iova_tree_delete); 37100ef422eSEugenio Pérez } 37200ef422eSEugenio Pérez } 37300ef422eSEugenio Pérez 3741e0a84eaSCindy Lu static NetClientInfo net_vhost_vdpa_info = { 3751e0a84eaSCindy Lu .type = NET_CLIENT_DRIVER_VHOST_VDPA, 3761e0a84eaSCindy Lu .size = sizeof(VhostVDPAState), 377846a1e85SEugenio Pérez .receive = vhost_vdpa_receive, 37800ef422eSEugenio Pérez .start = vhost_vdpa_net_data_start, 37900ef422eSEugenio Pérez .stop = vhost_vdpa_net_client_stop, 3801e0a84eaSCindy Lu .cleanup = vhost_vdpa_cleanup, 3811e0a84eaSCindy Lu .has_vnet_hdr = vhost_vdpa_has_vnet_hdr, 3821e0a84eaSCindy Lu .has_ufo = vhost_vdpa_has_ufo, 383ee8a1c63SKevin Wolf .check_peer_type = vhost_vdpa_check_peer_type, 3841e0a84eaSCindy Lu }; 3851e0a84eaSCindy Lu 386152128d6SEugenio Pérez static int64_t vhost_vdpa_get_vring_group(int device_fd, unsigned vq_index, 387152128d6SEugenio Pérez Error **errp) 388c1a10086SEugenio Pérez { 389c1a10086SEugenio Pérez struct vhost_vring_state state = { 390c1a10086SEugenio Pérez .index = vq_index, 391c1a10086SEugenio Pérez }; 392c1a10086SEugenio Pérez int r = ioctl(device_fd, VHOST_VDPA_GET_VRING_GROUP, &state); 393c1a10086SEugenio Pérez 394c1a10086SEugenio Pérez if (unlikely(r < 0)) { 3950f2bb0bfSEugenio Pérez r = -errno; 396152128d6SEugenio Pérez error_setg_errno(errp, errno, "Cannot get VQ %u group", vq_index); 397c1a10086SEugenio Pérez return r; 398c1a10086SEugenio Pérez } 399c1a10086SEugenio Pérez 400c1a10086SEugenio Pérez return state.num; 401c1a10086SEugenio Pérez } 402c1a10086SEugenio Pérez 403c1a10086SEugenio Pérez static int vhost_vdpa_set_address_space_id(struct vhost_vdpa *v, 404c1a10086SEugenio Pérez unsigned vq_group, 405c1a10086SEugenio Pérez unsigned asid_num) 406c1a10086SEugenio Pérez { 407c1a10086SEugenio Pérez struct vhost_vring_state asid = { 408c1a10086SEugenio Pérez .index = vq_group, 409c1a10086SEugenio Pérez .num = asid_num, 410c1a10086SEugenio Pérez }; 411c1a10086SEugenio Pérez int r; 412c1a10086SEugenio Pérez 413c1a10086SEugenio Pérez r = ioctl(v->device_fd, VHOST_VDPA_SET_GROUP_ASID, &asid); 414c1a10086SEugenio Pérez if (unlikely(r < 0)) { 415c1a10086SEugenio Pérez error_report("Can't set vq group %u asid %u, errno=%d (%s)", 416c1a10086SEugenio Pérez asid.index, asid.num, errno, g_strerror(errno)); 417c1a10086SEugenio Pérez } 418c1a10086SEugenio Pérez return r; 419c1a10086SEugenio Pérez } 420c1a10086SEugenio Pérez 4212df4dd31SEugenio Pérez static void vhost_vdpa_cvq_unmap_buf(struct vhost_vdpa *v, void *addr) 4222df4dd31SEugenio Pérez { 4232df4dd31SEugenio Pérez VhostIOVATree *tree = v->iova_tree; 4242df4dd31SEugenio Pérez DMAMap needle = { 4252df4dd31SEugenio Pérez /* 4262df4dd31SEugenio Pérez * No need to specify size or to look for more translations since 4272df4dd31SEugenio Pérez * this contiguous chunk was allocated by us. 4282df4dd31SEugenio Pérez */ 4292df4dd31SEugenio Pérez .translated_addr = (hwaddr)(uintptr_t)addr, 4302df4dd31SEugenio Pérez }; 4312df4dd31SEugenio Pérez const DMAMap *map = vhost_iova_tree_find_iova(tree, &needle); 4322df4dd31SEugenio Pérez int r; 4332df4dd31SEugenio Pérez 4342df4dd31SEugenio Pérez if (unlikely(!map)) { 4352df4dd31SEugenio Pérez error_report("Cannot locate expected map"); 4362df4dd31SEugenio Pérez return; 4372df4dd31SEugenio Pérez } 4382df4dd31SEugenio Pérez 439cd831ed5SEugenio Pérez r = vhost_vdpa_dma_unmap(v, v->address_space_id, map->iova, map->size + 1); 4402df4dd31SEugenio Pérez if (unlikely(r != 0)) { 4412df4dd31SEugenio Pérez error_report("Device cannot unmap: %s(%d)", g_strerror(r), r); 4422df4dd31SEugenio Pérez } 4432df4dd31SEugenio Pérez 44469292a8eSEugenio Pérez vhost_iova_tree_remove(tree, *map); 4452df4dd31SEugenio Pérez } 4462df4dd31SEugenio Pérez 4477a7f87e9SEugenio Pérez /** Map CVQ buffer. */ 4487a7f87e9SEugenio Pérez static int vhost_vdpa_cvq_map_buf(struct vhost_vdpa *v, void *buf, size_t size, 4497a7f87e9SEugenio Pérez bool write) 4502df4dd31SEugenio Pérez { 4512df4dd31SEugenio Pérez DMAMap map = {}; 4522df4dd31SEugenio Pérez int r; 4532df4dd31SEugenio Pérez 4542df4dd31SEugenio Pérez map.translated_addr = (hwaddr)(uintptr_t)buf; 4557a7f87e9SEugenio Pérez map.size = size - 1; 4562df4dd31SEugenio Pérez map.perm = write ? IOMMU_RW : IOMMU_RO, 4572df4dd31SEugenio Pérez r = vhost_iova_tree_map_alloc(v->iova_tree, &map); 4582df4dd31SEugenio Pérez if (unlikely(r != IOVA_OK)) { 4592df4dd31SEugenio Pérez error_report("Cannot map injected element"); 4607a7f87e9SEugenio Pérez return r; 4612df4dd31SEugenio Pérez } 4622df4dd31SEugenio Pérez 463cd831ed5SEugenio Pérez r = vhost_vdpa_dma_map(v, v->address_space_id, map.iova, 464cd831ed5SEugenio Pérez vhost_vdpa_net_cvq_cmd_page_len(), buf, !write); 4652df4dd31SEugenio Pérez if (unlikely(r < 0)) { 4662df4dd31SEugenio Pérez goto dma_map_err; 4672df4dd31SEugenio Pérez } 4682df4dd31SEugenio Pérez 4697a7f87e9SEugenio Pérez return 0; 4702df4dd31SEugenio Pérez 4712df4dd31SEugenio Pérez dma_map_err: 47269292a8eSEugenio Pérez vhost_iova_tree_remove(v->iova_tree, map); 4737a7f87e9SEugenio Pérez return r; 4742df4dd31SEugenio Pérez } 4752df4dd31SEugenio Pérez 4767a7f87e9SEugenio Pérez static int vhost_vdpa_net_cvq_start(NetClientState *nc) 4772df4dd31SEugenio Pérez { 47800ef422eSEugenio Pérez VhostVDPAState *s, *s0; 479c1a10086SEugenio Pérez struct vhost_vdpa *v; 480c1a10086SEugenio Pérez int64_t cvq_group; 481152128d6SEugenio Pérez int r; 482152128d6SEugenio Pérez Error *err = NULL; 4832df4dd31SEugenio Pérez 4847a7f87e9SEugenio Pérez assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 4857a7f87e9SEugenio Pérez 4867a7f87e9SEugenio Pérez s = DO_UPCAST(VhostVDPAState, nc, nc); 487c1a10086SEugenio Pérez v = &s->vhost_vdpa; 488c1a10086SEugenio Pérez 48969498430SEugenio Pérez s0 = vhost_vdpa_net_first_nc_vdpa(s); 49069498430SEugenio Pérez v->shadow_data = s0->vhost_vdpa.shadow_vqs_enabled; 491c1a10086SEugenio Pérez v->shadow_vqs_enabled = s->always_svq; 492c1a10086SEugenio Pérez s->vhost_vdpa.address_space_id = VHOST_VDPA_GUEST_PA_ASID; 493c1a10086SEugenio Pérez 49469498430SEugenio Pérez if (s->vhost_vdpa.shadow_data) { 495c1a10086SEugenio Pérez /* SVQ is already configured for all virtqueues */ 496c1a10086SEugenio Pérez goto out; 497c1a10086SEugenio Pérez } 498c1a10086SEugenio Pérez 499c1a10086SEugenio Pérez /* 500c1a10086SEugenio Pérez * If we early return in these cases SVQ will not be enabled. The migration 501c1a10086SEugenio Pérez * will be blocked as long as vhost-vdpa backends will not offer _F_LOG. 502c1a10086SEugenio Pérez */ 503152128d6SEugenio Pérez if (!vhost_vdpa_net_valid_svq_features(v->dev->features, NULL)) { 504c1a10086SEugenio Pérez return 0; 505c1a10086SEugenio Pérez } 506c1a10086SEugenio Pérez 507152128d6SEugenio Pérez if (!s->cvq_isolated) { 508152128d6SEugenio Pérez return 0; 509152128d6SEugenio Pérez } 510152128d6SEugenio Pérez 511152128d6SEugenio Pérez cvq_group = vhost_vdpa_get_vring_group(v->device_fd, 512152128d6SEugenio Pérez v->dev->vq_index_end - 1, 513152128d6SEugenio Pérez &err); 514c1a10086SEugenio Pérez if (unlikely(cvq_group < 0)) { 515152128d6SEugenio Pérez error_report_err(err); 516c1a10086SEugenio Pérez return cvq_group; 517c1a10086SEugenio Pérez } 518c1a10086SEugenio Pérez 519c1a10086SEugenio Pérez r = vhost_vdpa_set_address_space_id(v, cvq_group, VHOST_VDPA_NET_CVQ_ASID); 520c1a10086SEugenio Pérez if (unlikely(r < 0)) { 521c1a10086SEugenio Pérez return r; 522c1a10086SEugenio Pérez } 523c1a10086SEugenio Pérez 524c1a10086SEugenio Pérez v->shadow_vqs_enabled = true; 525c1a10086SEugenio Pérez s->vhost_vdpa.address_space_id = VHOST_VDPA_NET_CVQ_ASID; 526c1a10086SEugenio Pérez 527c1a10086SEugenio Pérez out: 5287a7f87e9SEugenio Pérez if (!s->vhost_vdpa.shadow_vqs_enabled) { 5297a7f87e9SEugenio Pérez return 0; 5302df4dd31SEugenio Pérez } 5312df4dd31SEugenio Pérez 53200ef422eSEugenio Pérez if (s0->vhost_vdpa.iova_tree) { 53300ef422eSEugenio Pérez /* 53400ef422eSEugenio Pérez * SVQ is already configured for all virtqueues. Reuse IOVA tree for 53500ef422eSEugenio Pérez * simplicity, whether CVQ shares ASID with guest or not, because: 53600ef422eSEugenio Pérez * - Memory listener need access to guest's memory addresses allocated 53700ef422eSEugenio Pérez * in the IOVA tree. 53800ef422eSEugenio Pérez * - There should be plenty of IOVA address space for both ASID not to 53900ef422eSEugenio Pérez * worry about collisions between them. Guest's translations are 54000ef422eSEugenio Pérez * still validated with virtio virtqueue_pop so there is no risk for 54100ef422eSEugenio Pérez * the guest to access memory that it shouldn't. 54200ef422eSEugenio Pérez * 54300ef422eSEugenio Pérez * To allocate a iova tree per ASID is doable but it complicates the 54400ef422eSEugenio Pérez * code and it is not worth it for the moment. 54500ef422eSEugenio Pérez */ 54600ef422eSEugenio Pérez v->iova_tree = s0->vhost_vdpa.iova_tree; 54700ef422eSEugenio Pérez } else { 54800ef422eSEugenio Pérez v->iova_tree = vhost_iova_tree_new(v->iova_range.first, 54900ef422eSEugenio Pérez v->iova_range.last); 55000ef422eSEugenio Pérez } 55100ef422eSEugenio Pérez 5527a7f87e9SEugenio Pérez r = vhost_vdpa_cvq_map_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer, 5537a7f87e9SEugenio Pérez vhost_vdpa_net_cvq_cmd_page_len(), false); 5547a7f87e9SEugenio Pérez if (unlikely(r < 0)) { 5557a7f87e9SEugenio Pérez return r; 5567a7f87e9SEugenio Pérez } 5577a7f87e9SEugenio Pérez 55817fb889fSEugenio Pérez r = vhost_vdpa_cvq_map_buf(&s->vhost_vdpa, s->status, 5597a7f87e9SEugenio Pérez vhost_vdpa_net_cvq_cmd_page_len(), true); 5607a7f87e9SEugenio Pérez if (unlikely(r < 0)) { 5612df4dd31SEugenio Pérez vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer); 5622df4dd31SEugenio Pérez } 5632df4dd31SEugenio Pérez 5647a7f87e9SEugenio Pérez return r; 5657a7f87e9SEugenio Pérez } 5667a7f87e9SEugenio Pérez 5677a7f87e9SEugenio Pérez static void vhost_vdpa_net_cvq_stop(NetClientState *nc) 5687a7f87e9SEugenio Pérez { 5697a7f87e9SEugenio Pérez VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); 5707a7f87e9SEugenio Pérez 5717a7f87e9SEugenio Pérez assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 5727a7f87e9SEugenio Pérez 5737a7f87e9SEugenio Pérez if (s->vhost_vdpa.shadow_vqs_enabled) { 5747a7f87e9SEugenio Pérez vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer); 57517fb889fSEugenio Pérez vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->status); 576c1a10086SEugenio Pérez } 57700ef422eSEugenio Pérez 57800ef422eSEugenio Pérez vhost_vdpa_net_client_stop(nc); 5792df4dd31SEugenio Pérez } 5802df4dd31SEugenio Pérez 581be4278b6SEugenio Pérez static ssize_t vhost_vdpa_net_cvq_add(VhostVDPAState *s, size_t out_len, 582be4278b6SEugenio Pérez size_t in_len) 583be4278b6SEugenio Pérez { 584be4278b6SEugenio Pérez /* Buffers for the device */ 585be4278b6SEugenio Pérez const struct iovec out = { 586be4278b6SEugenio Pérez .iov_base = s->cvq_cmd_out_buffer, 587be4278b6SEugenio Pérez .iov_len = out_len, 588be4278b6SEugenio Pérez }; 589be4278b6SEugenio Pérez const struct iovec in = { 59017fb889fSEugenio Pérez .iov_base = s->status, 591be4278b6SEugenio Pérez .iov_len = sizeof(virtio_net_ctrl_ack), 592be4278b6SEugenio Pérez }; 593be4278b6SEugenio Pérez VhostShadowVirtqueue *svq = g_ptr_array_index(s->vhost_vdpa.shadow_vqs, 0); 594be4278b6SEugenio Pérez int r; 595be4278b6SEugenio Pérez 596be4278b6SEugenio Pérez r = vhost_svq_add(svq, &out, 1, &in, 1, NULL); 597be4278b6SEugenio Pérez if (unlikely(r != 0)) { 598be4278b6SEugenio Pérez if (unlikely(r == -ENOSPC)) { 599be4278b6SEugenio Pérez qemu_log_mask(LOG_GUEST_ERROR, "%s: No space on device queue\n", 600be4278b6SEugenio Pérez __func__); 601be4278b6SEugenio Pérez } 602be4278b6SEugenio Pérez return r; 603be4278b6SEugenio Pérez } 604be4278b6SEugenio Pérez 605be4278b6SEugenio Pérez /* 606be4278b6SEugenio Pérez * We can poll here since we've had BQL from the time we sent the 607be4278b6SEugenio Pérez * descriptor. Also, we need to take the answer before SVQ pulls by itself, 608be4278b6SEugenio Pérez * when BQL is released 609be4278b6SEugenio Pérez */ 610be4278b6SEugenio Pérez return vhost_svq_poll(svq); 611be4278b6SEugenio Pérez } 612be4278b6SEugenio Pérez 613f73c0c43SEugenio Pérez static ssize_t vhost_vdpa_net_load_cmd(VhostVDPAState *s, uint8_t class, 614f73c0c43SEugenio Pérez uint8_t cmd, const void *data, 615f73c0c43SEugenio Pérez size_t data_size) 616f73c0c43SEugenio Pérez { 617f73c0c43SEugenio Pérez const struct virtio_net_ctrl_hdr ctrl = { 618f73c0c43SEugenio Pérez .class = class, 619f73c0c43SEugenio Pérez .cmd = cmd, 620f73c0c43SEugenio Pérez }; 621f73c0c43SEugenio Pérez 622f73c0c43SEugenio Pérez assert(data_size < vhost_vdpa_net_cvq_cmd_page_len() - sizeof(ctrl)); 623f73c0c43SEugenio Pérez 624f73c0c43SEugenio Pérez memcpy(s->cvq_cmd_out_buffer, &ctrl, sizeof(ctrl)); 625f73c0c43SEugenio Pérez memcpy(s->cvq_cmd_out_buffer + sizeof(ctrl), data, data_size); 626f73c0c43SEugenio Pérez 627f73c0c43SEugenio Pérez return vhost_vdpa_net_cvq_add(s, sizeof(ctrl) + data_size, 628f73c0c43SEugenio Pérez sizeof(virtio_net_ctrl_ack)); 629f73c0c43SEugenio Pérez } 630f73c0c43SEugenio Pérez 631f73c0c43SEugenio Pérez static int vhost_vdpa_net_load_mac(VhostVDPAState *s, const VirtIONet *n) 632f73c0c43SEugenio Pérez { 63302d3bf09SHawkins Jiawei if (virtio_vdev_has_feature(&n->parent_obj, VIRTIO_NET_F_CTRL_MAC_ADDR)) { 634f73c0c43SEugenio Pérez ssize_t dev_written = vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_MAC, 635f73c0c43SEugenio Pérez VIRTIO_NET_CTRL_MAC_ADDR_SET, 636f73c0c43SEugenio Pérez n->mac, sizeof(n->mac)); 637f73c0c43SEugenio Pérez if (unlikely(dev_written < 0)) { 638f73c0c43SEugenio Pérez return dev_written; 639f73c0c43SEugenio Pérez } 640f73c0c43SEugenio Pérez 641f73c0c43SEugenio Pérez return *s->status != VIRTIO_NET_OK; 642f73c0c43SEugenio Pérez } 643f73c0c43SEugenio Pérez 644f73c0c43SEugenio Pérez return 0; 645f73c0c43SEugenio Pérez } 646f73c0c43SEugenio Pérez 647f64c7cdaSEugenio Pérez static int vhost_vdpa_net_load_mq(VhostVDPAState *s, 648f64c7cdaSEugenio Pérez const VirtIONet *n) 649f64c7cdaSEugenio Pérez { 650f64c7cdaSEugenio Pérez struct virtio_net_ctrl_mq mq; 651f64c7cdaSEugenio Pérez ssize_t dev_written; 652f64c7cdaSEugenio Pérez 65302d3bf09SHawkins Jiawei if (!virtio_vdev_has_feature(&n->parent_obj, VIRTIO_NET_F_MQ)) { 654f64c7cdaSEugenio Pérez return 0; 655f64c7cdaSEugenio Pérez } 656f64c7cdaSEugenio Pérez 657f64c7cdaSEugenio Pérez mq.virtqueue_pairs = cpu_to_le16(n->curr_queue_pairs); 658f64c7cdaSEugenio Pérez dev_written = vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_MQ, 659f64c7cdaSEugenio Pérez VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET, &mq, 660f64c7cdaSEugenio Pérez sizeof(mq)); 661f64c7cdaSEugenio Pérez if (unlikely(dev_written < 0)) { 662f64c7cdaSEugenio Pérez return dev_written; 663f64c7cdaSEugenio Pérez } 664f64c7cdaSEugenio Pérez 665f64c7cdaSEugenio Pérez return *s->status != VIRTIO_NET_OK; 666f64c7cdaSEugenio Pérez } 667f64c7cdaSEugenio Pérez 6680b58d368SHawkins Jiawei static int vhost_vdpa_net_load_offloads(VhostVDPAState *s, 6690b58d368SHawkins Jiawei const VirtIONet *n) 6700b58d368SHawkins Jiawei { 6710b58d368SHawkins Jiawei uint64_t offloads; 6720b58d368SHawkins Jiawei ssize_t dev_written; 6730b58d368SHawkins Jiawei 6740b58d368SHawkins Jiawei if (!virtio_vdev_has_feature(&n->parent_obj, 6750b58d368SHawkins Jiawei VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) { 6760b58d368SHawkins Jiawei return 0; 6770b58d368SHawkins Jiawei } 6780b58d368SHawkins Jiawei 6790b58d368SHawkins Jiawei if (n->curr_guest_offloads == virtio_net_supported_guest_offloads(n)) { 6800b58d368SHawkins Jiawei /* 6810b58d368SHawkins Jiawei * According to VirtIO standard, "Upon feature negotiation 6820b58d368SHawkins Jiawei * corresponding offload gets enabled to preserve 6830b58d368SHawkins Jiawei * backward compatibility.". 6840b58d368SHawkins Jiawei * 6850b58d368SHawkins Jiawei * Therefore, there is no need to send this CVQ command if the 6860b58d368SHawkins Jiawei * driver also enables all supported offloads, which aligns with 6870b58d368SHawkins Jiawei * the device's defaults. 6880b58d368SHawkins Jiawei * 6890b58d368SHawkins Jiawei * Note that the device's defaults can mismatch the driver's 6900b58d368SHawkins Jiawei * configuration only at live migration. 6910b58d368SHawkins Jiawei */ 6920b58d368SHawkins Jiawei return 0; 6930b58d368SHawkins Jiawei } 6940b58d368SHawkins Jiawei 6950b58d368SHawkins Jiawei offloads = cpu_to_le64(n->curr_guest_offloads); 6960b58d368SHawkins Jiawei dev_written = vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_GUEST_OFFLOADS, 6970b58d368SHawkins Jiawei VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET, 6980b58d368SHawkins Jiawei &offloads, sizeof(offloads)); 6990b58d368SHawkins Jiawei if (unlikely(dev_written < 0)) { 7000b58d368SHawkins Jiawei return dev_written; 7010b58d368SHawkins Jiawei } 7020b58d368SHawkins Jiawei 7030b58d368SHawkins Jiawei return *s->status != VIRTIO_NET_OK; 7040b58d368SHawkins Jiawei } 7050b58d368SHawkins Jiawei 706dd036d8dSEugenio Pérez static int vhost_vdpa_net_load(NetClientState *nc) 707dd036d8dSEugenio Pérez { 708dd036d8dSEugenio Pérez VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); 709f73c0c43SEugenio Pérez struct vhost_vdpa *v = &s->vhost_vdpa; 710dd036d8dSEugenio Pérez const VirtIONet *n; 711f73c0c43SEugenio Pérez int r; 712dd036d8dSEugenio Pérez 713dd036d8dSEugenio Pérez assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 714dd036d8dSEugenio Pérez 715dd036d8dSEugenio Pérez if (!v->shadow_vqs_enabled) { 716dd036d8dSEugenio Pérez return 0; 717dd036d8dSEugenio Pérez } 718dd036d8dSEugenio Pérez 719dd036d8dSEugenio Pérez n = VIRTIO_NET(v->dev->vdev); 720f73c0c43SEugenio Pérez r = vhost_vdpa_net_load_mac(s, n); 721f73c0c43SEugenio Pérez if (unlikely(r < 0)) { 722f73c0c43SEugenio Pérez return r; 723dd036d8dSEugenio Pérez } 724f64c7cdaSEugenio Pérez r = vhost_vdpa_net_load_mq(s, n); 725f64c7cdaSEugenio Pérez if (unlikely(r)) { 726f64c7cdaSEugenio Pérez return r; 727f64c7cdaSEugenio Pérez } 7280b58d368SHawkins Jiawei r = vhost_vdpa_net_load_offloads(s, n); 7290b58d368SHawkins Jiawei if (unlikely(r)) { 7300b58d368SHawkins Jiawei return r; 7310b58d368SHawkins Jiawei } 732dd036d8dSEugenio Pérez 733dd036d8dSEugenio Pérez return 0; 734dd036d8dSEugenio Pérez } 735dd036d8dSEugenio Pérez 736f8972b56SEugenio Pérez static NetClientInfo net_vhost_vdpa_cvq_info = { 737f8972b56SEugenio Pérez .type = NET_CLIENT_DRIVER_VHOST_VDPA, 738f8972b56SEugenio Pérez .size = sizeof(VhostVDPAState), 739f8972b56SEugenio Pérez .receive = vhost_vdpa_receive, 7407a7f87e9SEugenio Pérez .start = vhost_vdpa_net_cvq_start, 741dd036d8dSEugenio Pérez .load = vhost_vdpa_net_load, 7427a7f87e9SEugenio Pérez .stop = vhost_vdpa_net_cvq_stop, 743f8972b56SEugenio Pérez .cleanup = vhost_vdpa_cleanup, 744f8972b56SEugenio Pérez .has_vnet_hdr = vhost_vdpa_has_vnet_hdr, 745f8972b56SEugenio Pérez .has_ufo = vhost_vdpa_has_ufo, 746f8972b56SEugenio Pérez .check_peer_type = vhost_vdpa_check_peer_type, 747f8972b56SEugenio Pérez }; 748f8972b56SEugenio Pérez 7492df4dd31SEugenio Pérez /** 7502df4dd31SEugenio Pérez * Validate and copy control virtqueue commands. 7512df4dd31SEugenio Pérez * 7522df4dd31SEugenio Pérez * Following QEMU guidelines, we offer a copy of the buffers to the device to 7532df4dd31SEugenio Pérez * prevent TOCTOU bugs. 754bd907ae4SEugenio Pérez */ 755bd907ae4SEugenio Pérez static int vhost_vdpa_net_handle_ctrl_avail(VhostShadowVirtqueue *svq, 756bd907ae4SEugenio Pérez VirtQueueElement *elem, 757bd907ae4SEugenio Pérez void *opaque) 758bd907ae4SEugenio Pérez { 7592df4dd31SEugenio Pérez VhostVDPAState *s = opaque; 760be4278b6SEugenio Pérez size_t in_len; 761bd907ae4SEugenio Pérez virtio_net_ctrl_ack status = VIRTIO_NET_ERR; 7627a7f87e9SEugenio Pérez /* Out buffer sent to both the vdpa device and the device model */ 7637a7f87e9SEugenio Pérez struct iovec out = { 7647a7f87e9SEugenio Pérez .iov_base = s->cvq_cmd_out_buffer, 7657a7f87e9SEugenio Pérez }; 7662df4dd31SEugenio Pérez /* in buffer used for device model */ 7672df4dd31SEugenio Pérez const struct iovec in = { 7682df4dd31SEugenio Pérez .iov_base = &status, 7692df4dd31SEugenio Pérez .iov_len = sizeof(status), 7702df4dd31SEugenio Pérez }; 771be4278b6SEugenio Pérez ssize_t dev_written = -EINVAL; 772bd907ae4SEugenio Pérez 7737a7f87e9SEugenio Pérez out.iov_len = iov_to_buf(elem->out_sg, elem->out_num, 0, 7747a7f87e9SEugenio Pérez s->cvq_cmd_out_buffer, 7757a7f87e9SEugenio Pérez vhost_vdpa_net_cvq_cmd_len()); 7763f9a3eebSEugenio Pérez if (*(uint8_t *)s->cvq_cmd_out_buffer == VIRTIO_NET_CTRL_ANNOUNCE) { 7773f9a3eebSEugenio Pérez /* 7783f9a3eebSEugenio Pérez * Guest announce capability is emulated by qemu, so don't forward to 7793f9a3eebSEugenio Pérez * the device. 7803f9a3eebSEugenio Pérez */ 7813f9a3eebSEugenio Pérez dev_written = sizeof(status); 7823f9a3eebSEugenio Pérez *s->status = VIRTIO_NET_OK; 7833f9a3eebSEugenio Pérez } else { 784be4278b6SEugenio Pérez dev_written = vhost_vdpa_net_cvq_add(s, out.iov_len, sizeof(status)); 785be4278b6SEugenio Pérez if (unlikely(dev_written < 0)) { 786bd907ae4SEugenio Pérez goto out; 787bd907ae4SEugenio Pérez } 7883f9a3eebSEugenio Pérez } 789bd907ae4SEugenio Pérez 790bd907ae4SEugenio Pérez if (unlikely(dev_written < sizeof(status))) { 791bd907ae4SEugenio Pérez error_report("Insufficient written data (%zu)", dev_written); 7922df4dd31SEugenio Pérez goto out; 7932df4dd31SEugenio Pérez } 7942df4dd31SEugenio Pérez 79517fb889fSEugenio Pérez if (*s->status != VIRTIO_NET_OK) { 796be4278b6SEugenio Pérez return VIRTIO_NET_ERR; 7972df4dd31SEugenio Pérez } 7982df4dd31SEugenio Pérez 7992df4dd31SEugenio Pérez status = VIRTIO_NET_ERR; 8007a7f87e9SEugenio Pérez virtio_net_handle_ctrl_iov(svq->vdev, &in, 1, &out, 1); 8012df4dd31SEugenio Pérez if (status != VIRTIO_NET_OK) { 8022df4dd31SEugenio Pérez error_report("Bad CVQ processing in model"); 803bd907ae4SEugenio Pérez } 804bd907ae4SEugenio Pérez 805bd907ae4SEugenio Pérez out: 806bd907ae4SEugenio Pérez in_len = iov_from_buf(elem->in_sg, elem->in_num, 0, &status, 807bd907ae4SEugenio Pérez sizeof(status)); 808bd907ae4SEugenio Pérez if (unlikely(in_len < sizeof(status))) { 809bd907ae4SEugenio Pérez error_report("Bad device CVQ written length"); 810bd907ae4SEugenio Pérez } 811bd907ae4SEugenio Pérez vhost_svq_push_elem(svq, elem, MIN(in_len, sizeof(status))); 812bd907ae4SEugenio Pérez g_free(elem); 813be4278b6SEugenio Pérez return dev_written < 0 ? dev_written : 0; 814bd907ae4SEugenio Pérez } 815bd907ae4SEugenio Pérez 816bd907ae4SEugenio Pérez static const VhostShadowVirtqueueOps vhost_vdpa_net_svq_ops = { 817bd907ae4SEugenio Pérez .avail_handler = vhost_vdpa_net_handle_ctrl_avail, 818bd907ae4SEugenio Pérez }; 819bd907ae4SEugenio Pérez 820152128d6SEugenio Pérez /** 821152128d6SEugenio Pérez * Probe if CVQ is isolated 822152128d6SEugenio Pérez * 823152128d6SEugenio Pérez * @device_fd The vdpa device fd 824152128d6SEugenio Pérez * @features Features offered by the device. 825152128d6SEugenio Pérez * @cvq_index The control vq pair index 826152128d6SEugenio Pérez * 827152128d6SEugenio Pérez * Returns <0 in case of failure, 0 if false and 1 if true. 828152128d6SEugenio Pérez */ 829152128d6SEugenio Pérez static int vhost_vdpa_probe_cvq_isolation(int device_fd, uint64_t features, 830152128d6SEugenio Pérez int cvq_index, Error **errp) 831152128d6SEugenio Pérez { 832152128d6SEugenio Pérez uint64_t backend_features; 833152128d6SEugenio Pérez int64_t cvq_group; 834152128d6SEugenio Pérez uint8_t status = VIRTIO_CONFIG_S_ACKNOWLEDGE | 835152128d6SEugenio Pérez VIRTIO_CONFIG_S_DRIVER | 836152128d6SEugenio Pérez VIRTIO_CONFIG_S_FEATURES_OK; 837152128d6SEugenio Pérez int r; 838152128d6SEugenio Pérez 839152128d6SEugenio Pérez ERRP_GUARD(); 840152128d6SEugenio Pérez 841152128d6SEugenio Pérez r = ioctl(device_fd, VHOST_GET_BACKEND_FEATURES, &backend_features); 842152128d6SEugenio Pérez if (unlikely(r < 0)) { 843152128d6SEugenio Pérez error_setg_errno(errp, errno, "Cannot get vdpa backend_features"); 844152128d6SEugenio Pérez return r; 845152128d6SEugenio Pérez } 846152128d6SEugenio Pérez 847152128d6SEugenio Pérez if (!(backend_features & BIT_ULL(VHOST_BACKEND_F_IOTLB_ASID))) { 848152128d6SEugenio Pérez return 0; 849152128d6SEugenio Pérez } 850152128d6SEugenio Pérez 851152128d6SEugenio Pérez r = ioctl(device_fd, VHOST_SET_FEATURES, &features); 852152128d6SEugenio Pérez if (unlikely(r)) { 853152128d6SEugenio Pérez error_setg_errno(errp, errno, "Cannot set features"); 854152128d6SEugenio Pérez } 855152128d6SEugenio Pérez 856152128d6SEugenio Pérez r = ioctl(device_fd, VHOST_VDPA_SET_STATUS, &status); 857152128d6SEugenio Pérez if (unlikely(r)) { 858152128d6SEugenio Pérez error_setg_errno(errp, -r, "Cannot set device features"); 859152128d6SEugenio Pérez goto out; 860152128d6SEugenio Pérez } 861152128d6SEugenio Pérez 862152128d6SEugenio Pérez cvq_group = vhost_vdpa_get_vring_group(device_fd, cvq_index, errp); 863152128d6SEugenio Pérez if (unlikely(cvq_group < 0)) { 864152128d6SEugenio Pérez if (cvq_group != -ENOTSUP) { 865152128d6SEugenio Pérez r = cvq_group; 866152128d6SEugenio Pérez goto out; 867152128d6SEugenio Pérez } 868152128d6SEugenio Pérez 869152128d6SEugenio Pérez /* 870152128d6SEugenio Pérez * The kernel report VHOST_BACKEND_F_IOTLB_ASID if the vdpa frontend 871152128d6SEugenio Pérez * support ASID even if the parent driver does not. The CVQ cannot be 872152128d6SEugenio Pérez * isolated in this case. 873152128d6SEugenio Pérez */ 874152128d6SEugenio Pérez error_free(*errp); 875152128d6SEugenio Pérez *errp = NULL; 876152128d6SEugenio Pérez r = 0; 877152128d6SEugenio Pérez goto out; 878152128d6SEugenio Pérez } 879152128d6SEugenio Pérez 880152128d6SEugenio Pérez for (int i = 0; i < cvq_index; ++i) { 881152128d6SEugenio Pérez int64_t group = vhost_vdpa_get_vring_group(device_fd, i, errp); 882152128d6SEugenio Pérez if (unlikely(group < 0)) { 883152128d6SEugenio Pérez r = group; 884152128d6SEugenio Pérez goto out; 885152128d6SEugenio Pérez } 886152128d6SEugenio Pérez 887152128d6SEugenio Pérez if (group == (int64_t)cvq_group) { 888152128d6SEugenio Pérez r = 0; 889152128d6SEugenio Pérez goto out; 890152128d6SEugenio Pérez } 891152128d6SEugenio Pérez } 892152128d6SEugenio Pérez 893152128d6SEugenio Pérez r = 1; 894152128d6SEugenio Pérez 895152128d6SEugenio Pérez out: 896152128d6SEugenio Pérez status = 0; 897152128d6SEugenio Pérez ioctl(device_fd, VHOST_VDPA_SET_STATUS, &status); 898152128d6SEugenio Pérez return r; 899152128d6SEugenio Pérez } 900152128d6SEugenio Pérez 901654790b6SJason Wang static NetClientState *net_vhost_vdpa_init(NetClientState *peer, 902654790b6SJason Wang const char *device, 903654790b6SJason Wang const char *name, 90440237840SJason Wang int vdpa_device_fd, 90540237840SJason Wang int queue_pair_index, 90640237840SJason Wang int nvqs, 9071576dbb5SEugenio Pérez bool is_datapath, 9081576dbb5SEugenio Pérez bool svq, 9095c1ebd4cSEugenio Pérez struct vhost_vdpa_iova_range iova_range, 910152128d6SEugenio Pérez uint64_t features, 911152128d6SEugenio Pérez Error **errp) 9121e0a84eaSCindy Lu { 9131e0a84eaSCindy Lu NetClientState *nc = NULL; 9141e0a84eaSCindy Lu VhostVDPAState *s; 9151e0a84eaSCindy Lu int ret = 0; 9161e0a84eaSCindy Lu assert(name); 917152128d6SEugenio Pérez int cvq_isolated; 918152128d6SEugenio Pérez 91940237840SJason Wang if (is_datapath) { 92040237840SJason Wang nc = qemu_new_net_client(&net_vhost_vdpa_info, peer, device, 92140237840SJason Wang name); 92240237840SJason Wang } else { 923152128d6SEugenio Pérez cvq_isolated = vhost_vdpa_probe_cvq_isolation(vdpa_device_fd, features, 924152128d6SEugenio Pérez queue_pair_index * 2, 925152128d6SEugenio Pérez errp); 926152128d6SEugenio Pérez if (unlikely(cvq_isolated < 0)) { 927152128d6SEugenio Pérez return NULL; 928152128d6SEugenio Pérez } 929152128d6SEugenio Pérez 930f8972b56SEugenio Pérez nc = qemu_new_net_control_client(&net_vhost_vdpa_cvq_info, peer, 93140237840SJason Wang device, name); 93240237840SJason Wang } 93353b85d95SLaurent Vivier qemu_set_info_str(nc, TYPE_VHOST_VDPA); 9341e0a84eaSCindy Lu s = DO_UPCAST(VhostVDPAState, nc, nc); 9357327813dSJason Wang 9361e0a84eaSCindy Lu s->vhost_vdpa.device_fd = vdpa_device_fd; 93740237840SJason Wang s->vhost_vdpa.index = queue_pair_index; 9387f211a28SEugenio Pérez s->always_svq = svq; 93969498430SEugenio Pérez s->migration_state.notify = vdpa_net_migration_state_notifier; 9401576dbb5SEugenio Pérez s->vhost_vdpa.shadow_vqs_enabled = svq; 941a585fad2SEugenio Pérez s->vhost_vdpa.iova_range = iova_range; 9426188d78aSEugenio Pérez s->vhost_vdpa.shadow_data = svq; 9435c1ebd4cSEugenio Pérez if (queue_pair_index == 0) { 9445c1ebd4cSEugenio Pérez vhost_vdpa_net_valid_svq_features(features, 9455c1ebd4cSEugenio Pérez &s->vhost_vdpa.migration_blocker); 9465c1ebd4cSEugenio Pérez } else if (!is_datapath) { 947babf8b87SEugenio Pérez s->cvq_cmd_out_buffer = mmap(NULL, vhost_vdpa_net_cvq_cmd_page_len(), 948babf8b87SEugenio Pérez PROT_READ | PROT_WRITE, 949babf8b87SEugenio Pérez MAP_SHARED | MAP_ANONYMOUS, -1, 0); 950babf8b87SEugenio Pérez s->status = mmap(NULL, vhost_vdpa_net_cvq_cmd_page_len(), 951babf8b87SEugenio Pérez PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 952babf8b87SEugenio Pérez -1, 0); 9532df4dd31SEugenio Pérez 954bd907ae4SEugenio Pérez s->vhost_vdpa.shadow_vq_ops = &vhost_vdpa_net_svq_ops; 955bd907ae4SEugenio Pérez s->vhost_vdpa.shadow_vq_ops_opaque = s; 956152128d6SEugenio Pérez s->cvq_isolated = cvq_isolated; 9579c363cf6SEugenio Pérez 9589c363cf6SEugenio Pérez /* 9598bc0049eSEugenio Pérez * TODO: We cannot migrate devices with CVQ and no x-svq enabled as 9608bc0049eSEugenio Pérez * there is no way to set the device state (MAC, MQ, etc) before 9618bc0049eSEugenio Pérez * starting the datapath. 9629c363cf6SEugenio Pérez * 9639c363cf6SEugenio Pérez * Migration blocker ownership now belongs to s->vhost_vdpa. 9649c363cf6SEugenio Pérez */ 9658bc0049eSEugenio Pérez if (!svq) { 9669c363cf6SEugenio Pérez error_setg(&s->vhost_vdpa.migration_blocker, 9679c363cf6SEugenio Pérez "net vdpa cannot migrate with CVQ feature"); 968bd907ae4SEugenio Pérez } 9698bc0049eSEugenio Pérez } 97040237840SJason Wang ret = vhost_vdpa_add(nc, (void *)&s->vhost_vdpa, queue_pair_index, nvqs); 97174af5eecSJason Wang if (ret) { 97274af5eecSJason Wang qemu_del_net_client(nc); 973654790b6SJason Wang return NULL; 97474af5eecSJason Wang } 975654790b6SJason Wang return nc; 9761e0a84eaSCindy Lu } 9771e0a84eaSCindy Lu 9788170ab3fSEugenio Pérez static int vhost_vdpa_get_features(int fd, uint64_t *features, Error **errp) 9798170ab3fSEugenio Pérez { 9808170ab3fSEugenio Pérez int ret = ioctl(fd, VHOST_GET_FEATURES, features); 9818170ab3fSEugenio Pérez if (unlikely(ret < 0)) { 9828170ab3fSEugenio Pérez error_setg_errno(errp, errno, 9838170ab3fSEugenio Pérez "Fail to query features from vhost-vDPA device"); 9848170ab3fSEugenio Pérez } 9858170ab3fSEugenio Pérez return ret; 9868170ab3fSEugenio Pérez } 9878170ab3fSEugenio Pérez 9888170ab3fSEugenio Pérez static int vhost_vdpa_get_max_queue_pairs(int fd, uint64_t features, 9898170ab3fSEugenio Pérez int *has_cvq, Error **errp) 99040237840SJason Wang { 99140237840SJason Wang unsigned long config_size = offsetof(struct vhost_vdpa_config, buf); 992cd523a41SStefano Garzarella g_autofree struct vhost_vdpa_config *config = NULL; 99340237840SJason Wang __virtio16 *max_queue_pairs; 99440237840SJason Wang int ret; 99540237840SJason Wang 99640237840SJason Wang if (features & (1 << VIRTIO_NET_F_CTRL_VQ)) { 99740237840SJason Wang *has_cvq = 1; 99840237840SJason Wang } else { 99940237840SJason Wang *has_cvq = 0; 100040237840SJason Wang } 100140237840SJason Wang 100240237840SJason Wang if (features & (1 << VIRTIO_NET_F_MQ)) { 100340237840SJason Wang config = g_malloc0(config_size + sizeof(*max_queue_pairs)); 100440237840SJason Wang config->off = offsetof(struct virtio_net_config, max_virtqueue_pairs); 100540237840SJason Wang config->len = sizeof(*max_queue_pairs); 100640237840SJason Wang 100740237840SJason Wang ret = ioctl(fd, VHOST_VDPA_GET_CONFIG, config); 100840237840SJason Wang if (ret) { 100940237840SJason Wang error_setg(errp, "Fail to get config from vhost-vDPA device"); 101040237840SJason Wang return -ret; 101140237840SJason Wang } 101240237840SJason Wang 101340237840SJason Wang max_queue_pairs = (__virtio16 *)&config->buf; 101440237840SJason Wang 101540237840SJason Wang return lduw_le_p(max_queue_pairs); 101640237840SJason Wang } 101740237840SJason Wang 101840237840SJason Wang return 1; 101940237840SJason Wang } 102040237840SJason Wang 10211e0a84eaSCindy Lu int net_init_vhost_vdpa(const Netdev *netdev, const char *name, 10221e0a84eaSCindy Lu NetClientState *peer, Error **errp) 10231e0a84eaSCindy Lu { 10241e0a84eaSCindy Lu const NetdevVhostVDPAOptions *opts; 10258170ab3fSEugenio Pérez uint64_t features; 1026654790b6SJason Wang int vdpa_device_fd; 1027eb3cb751SEugenio Pérez g_autofree NetClientState **ncs = NULL; 1028a585fad2SEugenio Pérez struct vhost_vdpa_iova_range iova_range; 1029eb3cb751SEugenio Pérez NetClientState *nc; 1030aed5da45SEugenio Pérez int queue_pairs, r, i = 0, has_cvq = 0; 10311e0a84eaSCindy Lu 10321e0a84eaSCindy Lu assert(netdev->type == NET_CLIENT_DRIVER_VHOST_VDPA); 10331e0a84eaSCindy Lu opts = &netdev->u.vhost_vdpa; 10347480874aSMarkus Armbruster if (!opts->vhostdev && !opts->vhostfd) { 10358801ccd0SSi-Wei Liu error_setg(errp, 10368801ccd0SSi-Wei Liu "vhost-vdpa: neither vhostdev= nor vhostfd= was specified"); 1037c8295404SEugenio Pérez return -1; 1038c8295404SEugenio Pérez } 10397327813dSJason Wang 10407480874aSMarkus Armbruster if (opts->vhostdev && opts->vhostfd) { 10418801ccd0SSi-Wei Liu error_setg(errp, 10428801ccd0SSi-Wei Liu "vhost-vdpa: vhostdev= and vhostfd= are mutually exclusive"); 10438801ccd0SSi-Wei Liu return -1; 10448801ccd0SSi-Wei Liu } 10458801ccd0SSi-Wei Liu 10467480874aSMarkus Armbruster if (opts->vhostdev) { 10470351152bSEugenio Pérez vdpa_device_fd = qemu_open(opts->vhostdev, O_RDWR, errp); 10487327813dSJason Wang if (vdpa_device_fd == -1) { 10497327813dSJason Wang return -errno; 10507327813dSJason Wang } 10515107fd3eSPeter Maydell } else { 10525107fd3eSPeter Maydell /* has_vhostfd */ 10538801ccd0SSi-Wei Liu vdpa_device_fd = monitor_fd_param(monitor_cur(), opts->vhostfd, errp); 10548801ccd0SSi-Wei Liu if (vdpa_device_fd == -1) { 10558801ccd0SSi-Wei Liu error_prepend(errp, "vhost-vdpa: unable to parse vhostfd: "); 10568801ccd0SSi-Wei Liu return -1; 10578801ccd0SSi-Wei Liu } 10588801ccd0SSi-Wei Liu } 10597327813dSJason Wang 10608170ab3fSEugenio Pérez r = vhost_vdpa_get_features(vdpa_device_fd, &features, errp); 10618170ab3fSEugenio Pérez if (unlikely(r < 0)) { 1062aed5da45SEugenio Pérez goto err; 10638170ab3fSEugenio Pérez } 10648170ab3fSEugenio Pérez 10658170ab3fSEugenio Pérez queue_pairs = vhost_vdpa_get_max_queue_pairs(vdpa_device_fd, features, 106640237840SJason Wang &has_cvq, errp); 106740237840SJason Wang if (queue_pairs < 0) { 10687327813dSJason Wang qemu_close(vdpa_device_fd); 106940237840SJason Wang return queue_pairs; 10707327813dSJason Wang } 10717327813dSJason Wang 1072bf7a2ad8SLongpeng r = vhost_vdpa_get_iova_range(vdpa_device_fd, &iova_range); 1073bf7a2ad8SLongpeng if (unlikely(r < 0)) { 1074bf7a2ad8SLongpeng error_setg(errp, "vhost-vdpa: get iova range failed: %s", 1075bf7a2ad8SLongpeng strerror(-r)); 1076bf7a2ad8SLongpeng goto err; 1077bf7a2ad8SLongpeng } 1078bf7a2ad8SLongpeng 107900ef422eSEugenio Pérez if (opts->x_svq && !vhost_vdpa_net_valid_svq_features(features, errp)) { 108000ef422eSEugenio Pérez goto err; 10811576dbb5SEugenio Pérez } 10821576dbb5SEugenio Pérez 108340237840SJason Wang ncs = g_malloc0(sizeof(*ncs) * queue_pairs); 108440237840SJason Wang 108540237840SJason Wang for (i = 0; i < queue_pairs; i++) { 108640237840SJason Wang ncs[i] = net_vhost_vdpa_init(peer, TYPE_VHOST_VDPA, name, 10871576dbb5SEugenio Pérez vdpa_device_fd, i, 2, true, opts->x_svq, 1088152128d6SEugenio Pérez iova_range, features, errp); 108940237840SJason Wang if (!ncs[i]) 109040237840SJason Wang goto err; 109140237840SJason Wang } 109240237840SJason Wang 109340237840SJason Wang if (has_cvq) { 109440237840SJason Wang nc = net_vhost_vdpa_init(peer, TYPE_VHOST_VDPA, name, 10951576dbb5SEugenio Pérez vdpa_device_fd, i, 1, false, 1096152128d6SEugenio Pérez opts->x_svq, iova_range, features, errp); 109740237840SJason Wang if (!nc) 109840237840SJason Wang goto err; 109940237840SJason Wang } 110040237840SJason Wang 1101654790b6SJason Wang return 0; 110240237840SJason Wang 110340237840SJason Wang err: 110440237840SJason Wang if (i) { 11059bd05507SSi-Wei Liu for (i--; i >= 0; i--) { 11069bd05507SSi-Wei Liu qemu_del_net_client(ncs[i]); 11079bd05507SSi-Wei Liu } 110840237840SJason Wang } 11091576dbb5SEugenio Pérez 111040237840SJason Wang qemu_close(vdpa_device_fd); 111140237840SJason Wang 111240237840SJason Wang return -1; 11131e0a84eaSCindy Lu } 1114