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 532875a0caSHawkins Jiawei /* 542875a0caSHawkins Jiawei * The array is sorted alphabetically in ascending order, 552875a0caSHawkins Jiawei * with the exception of VHOST_INVALID_FEATURE_BIT, 562875a0caSHawkins Jiawei * which should always be the last entry. 572875a0caSHawkins Jiawei */ 581e0a84eaSCindy Lu const int vdpa_feature_bits[] = { 591e0a84eaSCindy Lu VIRTIO_F_ANY_LAYOUT, 602875a0caSHawkins Jiawei VIRTIO_F_IOMMU_PLATFORM, 612875a0caSHawkins Jiawei VIRTIO_F_NOTIFY_ON_EMPTY, 622875a0caSHawkins Jiawei VIRTIO_F_RING_PACKED, 632875a0caSHawkins Jiawei VIRTIO_F_RING_RESET, 641e0a84eaSCindy Lu VIRTIO_F_VERSION_1, 651e0a84eaSCindy Lu VIRTIO_NET_F_CSUM, 6651e84244SEugenio Pérez VIRTIO_NET_F_CTRL_GUEST_OFFLOADS, 672875a0caSHawkins Jiawei VIRTIO_NET_F_CTRL_MAC_ADDR, 6840237840SJason Wang VIRTIO_NET_F_CTRL_RX, 6940237840SJason Wang VIRTIO_NET_F_CTRL_RX_EXTRA, 7040237840SJason Wang VIRTIO_NET_F_CTRL_VLAN, 7140237840SJason Wang VIRTIO_NET_F_CTRL_VQ, 722875a0caSHawkins Jiawei VIRTIO_NET_F_GSO, 732875a0caSHawkins Jiawei VIRTIO_NET_F_GUEST_CSUM, 742875a0caSHawkins Jiawei VIRTIO_NET_F_GUEST_ECN, 752875a0caSHawkins Jiawei VIRTIO_NET_F_GUEST_TSO4, 762875a0caSHawkins Jiawei VIRTIO_NET_F_GUEST_TSO6, 772875a0caSHawkins Jiawei VIRTIO_NET_F_GUEST_UFO, 78*9da16849SAndrew Melnychenko VIRTIO_NET_F_GUEST_USO4, 79*9da16849SAndrew Melnychenko VIRTIO_NET_F_GUEST_USO6, 800145c393SAndrew Melnychenko VIRTIO_NET_F_HASH_REPORT, 812875a0caSHawkins Jiawei VIRTIO_NET_F_HOST_ECN, 822875a0caSHawkins Jiawei VIRTIO_NET_F_HOST_TSO4, 832875a0caSHawkins Jiawei VIRTIO_NET_F_HOST_TSO6, 842875a0caSHawkins Jiawei VIRTIO_NET_F_HOST_UFO, 85*9da16849SAndrew Melnychenko VIRTIO_NET_F_HOST_USO, 862875a0caSHawkins Jiawei VIRTIO_NET_F_MQ, 872875a0caSHawkins Jiawei VIRTIO_NET_F_MRG_RXBUF, 882875a0caSHawkins Jiawei VIRTIO_NET_F_MTU, 892875a0caSHawkins Jiawei VIRTIO_NET_F_RSS, 909aa47eddSSi-Wei Liu VIRTIO_NET_F_STATUS, 912875a0caSHawkins Jiawei VIRTIO_RING_F_EVENT_IDX, 922875a0caSHawkins Jiawei VIRTIO_RING_F_INDIRECT_DESC, 932875a0caSHawkins Jiawei 942875a0caSHawkins Jiawei /* VHOST_INVALID_FEATURE_BIT should always be the last entry */ 951e0a84eaSCindy Lu VHOST_INVALID_FEATURE_BIT 961e0a84eaSCindy Lu }; 971e0a84eaSCindy Lu 981576dbb5SEugenio Pérez /** Supported device specific feature bits with SVQ */ 991576dbb5SEugenio Pérez static const uint64_t vdpa_svq_device_features = 1001576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_CSUM) | 1011576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_GUEST_CSUM) | 1024b4a1378SHawkins Jiawei BIT_ULL(VIRTIO_NET_F_CTRL_GUEST_OFFLOADS) | 1031576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_MTU) | 1041576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_MAC) | 1051576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_GUEST_TSO4) | 1061576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_GUEST_TSO6) | 1071576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_GUEST_ECN) | 1081576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_GUEST_UFO) | 1091576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_HOST_TSO4) | 1101576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_HOST_TSO6) | 1111576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_HOST_ECN) | 1121576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_HOST_UFO) | 1131576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_MRG_RXBUF) | 1141576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_STATUS) | 1151576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_CTRL_VQ) | 116ea6eec49SHawkins Jiawei BIT_ULL(VIRTIO_NET_F_CTRL_RX) | 117d669b7bbSHawkins Jiawei BIT_ULL(VIRTIO_NET_F_CTRL_RX_EXTRA) | 11872b99a87SEugenio Pérez BIT_ULL(VIRTIO_NET_F_MQ) | 1191576dbb5SEugenio Pérez BIT_ULL(VIRTIO_F_ANY_LAYOUT) | 1201576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_CTRL_MAC_ADDR) | 121609ab4c3SEugenio Pérez /* VHOST_F_LOG_ALL is exposed by SVQ */ 122609ab4c3SEugenio Pérez BIT_ULL(VHOST_F_LOG_ALL) | 1231576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_RSC_EXT) | 1240d74e2b7SEugenio Pérez BIT_ULL(VIRTIO_NET_F_STANDBY) | 1250d74e2b7SEugenio Pérez BIT_ULL(VIRTIO_NET_F_SPEED_DUPLEX); 1261576dbb5SEugenio Pérez 127c1a10086SEugenio Pérez #define VHOST_VDPA_NET_CVQ_ASID 1 128c1a10086SEugenio Pérez 1291e0a84eaSCindy Lu VHostNetState *vhost_vdpa_get_vhost_net(NetClientState *nc) 1301e0a84eaSCindy Lu { 1311e0a84eaSCindy Lu VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); 1321e0a84eaSCindy Lu assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 1331e0a84eaSCindy Lu return s->vhost_net; 1341e0a84eaSCindy Lu } 1351e0a84eaSCindy Lu 136915bf6ccSEugenio Pérez static size_t vhost_vdpa_net_cvq_cmd_len(void) 137915bf6ccSEugenio Pérez { 138915bf6ccSEugenio Pérez /* 139915bf6ccSEugenio Pérez * MAC_TABLE_SET is the ctrl command that produces the longer out buffer. 140915bf6ccSEugenio Pérez * In buffer is always 1 byte, so it should fit here 141915bf6ccSEugenio Pérez */ 142915bf6ccSEugenio Pérez return sizeof(struct virtio_net_ctrl_hdr) + 143915bf6ccSEugenio Pérez 2 * sizeof(struct virtio_net_ctrl_mac) + 144915bf6ccSEugenio Pérez MAC_TABLE_ENTRIES * ETH_ALEN; 145915bf6ccSEugenio Pérez } 146915bf6ccSEugenio Pérez 147915bf6ccSEugenio Pérez static size_t vhost_vdpa_net_cvq_cmd_page_len(void) 148915bf6ccSEugenio Pérez { 149915bf6ccSEugenio Pérez return ROUND_UP(vhost_vdpa_net_cvq_cmd_len(), qemu_real_host_page_size()); 150915bf6ccSEugenio Pérez } 151915bf6ccSEugenio Pérez 15236e46472SEugenio Pérez static bool vhost_vdpa_net_valid_svq_features(uint64_t features, Error **errp) 15336e46472SEugenio Pérez { 15436e46472SEugenio Pérez uint64_t invalid_dev_features = 15536e46472SEugenio Pérez features & ~vdpa_svq_device_features & 15636e46472SEugenio Pérez /* Transport are all accepted at this point */ 15736e46472SEugenio Pérez ~MAKE_64BIT_MASK(VIRTIO_TRANSPORT_F_START, 15836e46472SEugenio Pérez VIRTIO_TRANSPORT_F_END - VIRTIO_TRANSPORT_F_START); 15936e46472SEugenio Pérez 16036e46472SEugenio Pérez if (invalid_dev_features) { 16136e46472SEugenio Pérez error_setg(errp, "vdpa svq does not work with features 0x%" PRIx64, 16236e46472SEugenio Pérez invalid_dev_features); 163258a0394SEugenio Pérez return false; 16436e46472SEugenio Pérez } 16536e46472SEugenio Pérez 166258a0394SEugenio Pérez return vhost_svq_valid_features(features, errp); 16736e46472SEugenio Pérez } 16836e46472SEugenio Pérez 1691e0a84eaSCindy Lu static int vhost_vdpa_net_check_device_id(struct vhost_net *net) 1701e0a84eaSCindy Lu { 1711e0a84eaSCindy Lu uint32_t device_id; 1721e0a84eaSCindy Lu int ret; 1731e0a84eaSCindy Lu struct vhost_dev *hdev; 1741e0a84eaSCindy Lu 1751e0a84eaSCindy Lu hdev = (struct vhost_dev *)&net->dev; 1761e0a84eaSCindy Lu ret = hdev->vhost_ops->vhost_get_device_id(hdev, &device_id); 1771e0a84eaSCindy Lu if (device_id != VIRTIO_ID_NET) { 1781e0a84eaSCindy Lu return -ENOTSUP; 1791e0a84eaSCindy Lu } 1801e0a84eaSCindy Lu return ret; 1811e0a84eaSCindy Lu } 1821e0a84eaSCindy Lu 18340237840SJason Wang static int vhost_vdpa_add(NetClientState *ncs, void *be, 18440237840SJason Wang int queue_pair_index, int nvqs) 1851e0a84eaSCindy Lu { 1861e0a84eaSCindy Lu VhostNetOptions options; 1871e0a84eaSCindy Lu struct vhost_net *net = NULL; 1881e0a84eaSCindy Lu VhostVDPAState *s; 1891e0a84eaSCindy Lu int ret; 1901e0a84eaSCindy Lu 1911e0a84eaSCindy Lu options.backend_type = VHOST_BACKEND_TYPE_VDPA; 1921e0a84eaSCindy Lu assert(ncs->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 1931e0a84eaSCindy Lu s = DO_UPCAST(VhostVDPAState, nc, ncs); 1941e0a84eaSCindy Lu options.net_backend = ncs; 1951e0a84eaSCindy Lu options.opaque = be; 1961e0a84eaSCindy Lu options.busyloop_timeout = 0; 19740237840SJason Wang options.nvqs = nvqs; 1981e0a84eaSCindy Lu 1991e0a84eaSCindy Lu net = vhost_net_init(&options); 2001e0a84eaSCindy Lu if (!net) { 2011e0a84eaSCindy Lu error_report("failed to init vhost_net for queue"); 202a97ef87aSJason Wang goto err_init; 2031e0a84eaSCindy Lu } 2041e0a84eaSCindy Lu s->vhost_net = net; 2051e0a84eaSCindy Lu ret = vhost_vdpa_net_check_device_id(net); 2061e0a84eaSCindy Lu if (ret) { 207a97ef87aSJason Wang goto err_check; 2081e0a84eaSCindy Lu } 2091e0a84eaSCindy Lu return 0; 210a97ef87aSJason Wang err_check: 2111e0a84eaSCindy Lu vhost_net_cleanup(net); 212ab36edcfSJason Wang g_free(net); 213a97ef87aSJason Wang err_init: 2141e0a84eaSCindy Lu return -1; 2151e0a84eaSCindy Lu } 2161e0a84eaSCindy Lu 2171e0a84eaSCindy Lu static void vhost_vdpa_cleanup(NetClientState *nc) 2181e0a84eaSCindy Lu { 2191e0a84eaSCindy Lu VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); 2201e0a84eaSCindy Lu 221a0d7215eSAni Sinha /* 222a0d7215eSAni Sinha * If a peer NIC is attached, do not cleanup anything. 223a0d7215eSAni Sinha * Cleanup will happen as a part of qemu_cleanup() -> net_cleanup() 224a0d7215eSAni Sinha * when the guest is shutting down. 225a0d7215eSAni Sinha */ 226a0d7215eSAni Sinha if (nc->peer && nc->peer->info->type == NET_CLIENT_DRIVER_NIC) { 227a0d7215eSAni Sinha return; 228a0d7215eSAni Sinha } 229babf8b87SEugenio Pérez munmap(s->cvq_cmd_out_buffer, vhost_vdpa_net_cvq_cmd_page_len()); 230babf8b87SEugenio Pérez munmap(s->status, vhost_vdpa_net_cvq_cmd_page_len()); 2311e0a84eaSCindy Lu if (s->vhost_net) { 2321e0a84eaSCindy Lu vhost_net_cleanup(s->vhost_net); 2331e0a84eaSCindy Lu g_free(s->vhost_net); 2341e0a84eaSCindy Lu s->vhost_net = NULL; 2351e0a84eaSCindy Lu } 23657b3a7d8SCindy Lu if (s->vhost_vdpa.device_fd >= 0) { 23757b3a7d8SCindy Lu qemu_close(s->vhost_vdpa.device_fd); 23857b3a7d8SCindy Lu s->vhost_vdpa.device_fd = -1; 23957b3a7d8SCindy Lu } 2401e0a84eaSCindy Lu } 2411e0a84eaSCindy Lu 2421e0a84eaSCindy Lu static bool vhost_vdpa_has_vnet_hdr(NetClientState *nc) 2431e0a84eaSCindy Lu { 2441e0a84eaSCindy Lu assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 2451e0a84eaSCindy Lu 2461e0a84eaSCindy Lu return true; 2471e0a84eaSCindy Lu } 2481e0a84eaSCindy Lu 2491e0a84eaSCindy Lu static bool vhost_vdpa_has_ufo(NetClientState *nc) 2501e0a84eaSCindy Lu { 2511e0a84eaSCindy Lu assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 2521e0a84eaSCindy Lu VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); 2531e0a84eaSCindy Lu uint64_t features = 0; 2541e0a84eaSCindy Lu features |= (1ULL << VIRTIO_NET_F_HOST_UFO); 2551e0a84eaSCindy Lu features = vhost_net_get_features(s->vhost_net, features); 2561e0a84eaSCindy Lu return !!(features & (1ULL << VIRTIO_NET_F_HOST_UFO)); 2571e0a84eaSCindy Lu 2581e0a84eaSCindy Lu } 2591e0a84eaSCindy Lu 260ee8a1c63SKevin Wolf static bool vhost_vdpa_check_peer_type(NetClientState *nc, ObjectClass *oc, 261ee8a1c63SKevin Wolf Error **errp) 262ee8a1c63SKevin Wolf { 263ee8a1c63SKevin Wolf const char *driver = object_class_get_name(oc); 264ee8a1c63SKevin Wolf 265ee8a1c63SKevin Wolf if (!g_str_has_prefix(driver, "virtio-net-")) { 266ee8a1c63SKevin Wolf error_setg(errp, "vhost-vdpa requires frontend driver virtio-net-*"); 267ee8a1c63SKevin Wolf return false; 268ee8a1c63SKevin Wolf } 269ee8a1c63SKevin Wolf 270ee8a1c63SKevin Wolf return true; 271ee8a1c63SKevin Wolf } 272ee8a1c63SKevin Wolf 273846a1e85SEugenio Pérez /** Dummy receive in case qemu falls back to userland tap networking */ 274846a1e85SEugenio Pérez static ssize_t vhost_vdpa_receive(NetClientState *nc, const uint8_t *buf, 275846a1e85SEugenio Pérez size_t size) 276846a1e85SEugenio Pérez { 277bc5add1dSSi-Wei Liu return size; 278846a1e85SEugenio Pérez } 279846a1e85SEugenio Pérez 28000ef422eSEugenio Pérez /** From any vdpa net client, get the netclient of the first queue pair */ 28100ef422eSEugenio Pérez static VhostVDPAState *vhost_vdpa_net_first_nc_vdpa(VhostVDPAState *s) 28200ef422eSEugenio Pérez { 28300ef422eSEugenio Pérez NICState *nic = qemu_get_nic(s->nc.peer); 28400ef422eSEugenio Pérez NetClientState *nc0 = qemu_get_peer(nic->ncs, 0); 28500ef422eSEugenio Pérez 28600ef422eSEugenio Pérez return DO_UPCAST(VhostVDPAState, nc, nc0); 28700ef422eSEugenio Pérez } 28800ef422eSEugenio Pérez 28969498430SEugenio Pérez static void vhost_vdpa_net_log_global_enable(VhostVDPAState *s, bool enable) 29069498430SEugenio Pérez { 29169498430SEugenio Pérez struct vhost_vdpa *v = &s->vhost_vdpa; 29269498430SEugenio Pérez VirtIONet *n; 29369498430SEugenio Pérez VirtIODevice *vdev; 29469498430SEugenio Pérez int data_queue_pairs, cvq, r; 29569498430SEugenio Pérez 29669498430SEugenio Pérez /* We are only called on the first data vqs and only if x-svq is not set */ 29769498430SEugenio Pérez if (s->vhost_vdpa.shadow_vqs_enabled == enable) { 29869498430SEugenio Pérez return; 29969498430SEugenio Pérez } 30069498430SEugenio Pérez 30169498430SEugenio Pérez vdev = v->dev->vdev; 30269498430SEugenio Pérez n = VIRTIO_NET(vdev); 30369498430SEugenio Pérez if (!n->vhost_started) { 30469498430SEugenio Pérez return; 30569498430SEugenio Pérez } 30669498430SEugenio Pérez 30769498430SEugenio Pérez data_queue_pairs = n->multiqueue ? n->max_queue_pairs : 1; 30869498430SEugenio Pérez cvq = virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ) ? 30969498430SEugenio Pérez n->max_ncs - n->max_queue_pairs : 0; 31069498430SEugenio Pérez /* 31169498430SEugenio Pérez * TODO: vhost_net_stop does suspend, get_base and reset. We can be smarter 31269498430SEugenio Pérez * in the future and resume the device if read-only operations between 31369498430SEugenio Pérez * suspend and reset goes wrong. 31469498430SEugenio Pérez */ 31569498430SEugenio Pérez vhost_net_stop(vdev, n->nic->ncs, data_queue_pairs, cvq); 31669498430SEugenio Pérez 31769498430SEugenio Pérez /* Start will check migration setup_or_active to configure or not SVQ */ 31869498430SEugenio Pérez r = vhost_net_start(vdev, n->nic->ncs, data_queue_pairs, cvq); 31969498430SEugenio Pérez if (unlikely(r < 0)) { 32069498430SEugenio Pérez error_report("unable to start vhost net: %s(%d)", g_strerror(-r), -r); 32169498430SEugenio Pérez } 32269498430SEugenio Pérez } 32369498430SEugenio Pérez 32469498430SEugenio Pérez static void vdpa_net_migration_state_notifier(Notifier *notifier, void *data) 32569498430SEugenio Pérez { 32669498430SEugenio Pérez MigrationState *migration = data; 32769498430SEugenio Pérez VhostVDPAState *s = container_of(notifier, VhostVDPAState, 32869498430SEugenio Pérez migration_state); 32969498430SEugenio Pérez 33069498430SEugenio Pérez if (migration_in_setup(migration)) { 33169498430SEugenio Pérez vhost_vdpa_net_log_global_enable(s, true); 33269498430SEugenio Pérez } else if (migration_has_failed(migration)) { 33369498430SEugenio Pérez vhost_vdpa_net_log_global_enable(s, false); 33469498430SEugenio Pérez } 33569498430SEugenio Pérez } 33669498430SEugenio Pérez 33700ef422eSEugenio Pérez static void vhost_vdpa_net_data_start_first(VhostVDPAState *s) 33800ef422eSEugenio Pérez { 33900ef422eSEugenio Pérez struct vhost_vdpa *v = &s->vhost_vdpa; 34000ef422eSEugenio Pérez 34169498430SEugenio Pérez add_migration_state_change_notifier(&s->migration_state); 34200ef422eSEugenio Pérez if (v->shadow_vqs_enabled) { 34300ef422eSEugenio Pérez v->iova_tree = vhost_iova_tree_new(v->iova_range.first, 34400ef422eSEugenio Pérez v->iova_range.last); 34500ef422eSEugenio Pérez } 34600ef422eSEugenio Pérez } 34700ef422eSEugenio Pérez 34800ef422eSEugenio Pérez static int vhost_vdpa_net_data_start(NetClientState *nc) 34900ef422eSEugenio Pérez { 35000ef422eSEugenio Pérez VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); 35100ef422eSEugenio Pérez struct vhost_vdpa *v = &s->vhost_vdpa; 35200ef422eSEugenio Pérez 35300ef422eSEugenio Pérez assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 35400ef422eSEugenio Pérez 35569498430SEugenio Pérez if (s->always_svq || 35669498430SEugenio Pérez migration_is_setup_or_active(migrate_get_current()->state)) { 35769498430SEugenio Pérez v->shadow_vqs_enabled = true; 35869498430SEugenio Pérez v->shadow_data = true; 35969498430SEugenio Pérez } else { 36069498430SEugenio Pérez v->shadow_vqs_enabled = false; 36169498430SEugenio Pérez v->shadow_data = false; 36269498430SEugenio Pérez } 36369498430SEugenio Pérez 36400ef422eSEugenio Pérez if (v->index == 0) { 36500ef422eSEugenio Pérez vhost_vdpa_net_data_start_first(s); 36600ef422eSEugenio Pérez return 0; 36700ef422eSEugenio Pérez } 36800ef422eSEugenio Pérez 36900ef422eSEugenio Pérez if (v->shadow_vqs_enabled) { 37000ef422eSEugenio Pérez VhostVDPAState *s0 = vhost_vdpa_net_first_nc_vdpa(s); 37100ef422eSEugenio Pérez v->iova_tree = s0->vhost_vdpa.iova_tree; 37200ef422eSEugenio Pérez } 37300ef422eSEugenio Pérez 37400ef422eSEugenio Pérez return 0; 37500ef422eSEugenio Pérez } 37600ef422eSEugenio Pérez 37700ef422eSEugenio Pérez static void vhost_vdpa_net_client_stop(NetClientState *nc) 37800ef422eSEugenio Pérez { 37900ef422eSEugenio Pérez VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); 38000ef422eSEugenio Pérez struct vhost_dev *dev; 38100ef422eSEugenio Pérez 38200ef422eSEugenio Pérez assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 38300ef422eSEugenio Pérez 38469498430SEugenio Pérez if (s->vhost_vdpa.index == 0) { 38569498430SEugenio Pérez remove_migration_state_change_notifier(&s->migration_state); 38669498430SEugenio Pérez } 38769498430SEugenio Pérez 38800ef422eSEugenio Pérez dev = s->vhost_vdpa.dev; 38900ef422eSEugenio Pérez if (dev->vq_index + dev->nvqs == dev->vq_index_end) { 39000ef422eSEugenio Pérez g_clear_pointer(&s->vhost_vdpa.iova_tree, vhost_iova_tree_delete); 39100ef422eSEugenio Pérez } 39200ef422eSEugenio Pérez } 39300ef422eSEugenio Pérez 3941e0a84eaSCindy Lu static NetClientInfo net_vhost_vdpa_info = { 3951e0a84eaSCindy Lu .type = NET_CLIENT_DRIVER_VHOST_VDPA, 3961e0a84eaSCindy Lu .size = sizeof(VhostVDPAState), 397846a1e85SEugenio Pérez .receive = vhost_vdpa_receive, 39800ef422eSEugenio Pérez .start = vhost_vdpa_net_data_start, 39900ef422eSEugenio Pérez .stop = vhost_vdpa_net_client_stop, 4001e0a84eaSCindy Lu .cleanup = vhost_vdpa_cleanup, 4011e0a84eaSCindy Lu .has_vnet_hdr = vhost_vdpa_has_vnet_hdr, 4021e0a84eaSCindy Lu .has_ufo = vhost_vdpa_has_ufo, 403ee8a1c63SKevin Wolf .check_peer_type = vhost_vdpa_check_peer_type, 4041e0a84eaSCindy Lu }; 4051e0a84eaSCindy Lu 406152128d6SEugenio Pérez static int64_t vhost_vdpa_get_vring_group(int device_fd, unsigned vq_index, 407152128d6SEugenio Pérez Error **errp) 408c1a10086SEugenio Pérez { 409c1a10086SEugenio Pérez struct vhost_vring_state state = { 410c1a10086SEugenio Pérez .index = vq_index, 411c1a10086SEugenio Pérez }; 412c1a10086SEugenio Pérez int r = ioctl(device_fd, VHOST_VDPA_GET_VRING_GROUP, &state); 413c1a10086SEugenio Pérez 414c1a10086SEugenio Pérez if (unlikely(r < 0)) { 4150f2bb0bfSEugenio Pérez r = -errno; 416152128d6SEugenio Pérez error_setg_errno(errp, errno, "Cannot get VQ %u group", vq_index); 417c1a10086SEugenio Pérez return r; 418c1a10086SEugenio Pérez } 419c1a10086SEugenio Pérez 420c1a10086SEugenio Pérez return state.num; 421c1a10086SEugenio Pérez } 422c1a10086SEugenio Pérez 423c1a10086SEugenio Pérez static int vhost_vdpa_set_address_space_id(struct vhost_vdpa *v, 424c1a10086SEugenio Pérez unsigned vq_group, 425c1a10086SEugenio Pérez unsigned asid_num) 426c1a10086SEugenio Pérez { 427c1a10086SEugenio Pérez struct vhost_vring_state asid = { 428c1a10086SEugenio Pérez .index = vq_group, 429c1a10086SEugenio Pérez .num = asid_num, 430c1a10086SEugenio Pérez }; 431c1a10086SEugenio Pérez int r; 432c1a10086SEugenio Pérez 433c1a10086SEugenio Pérez r = ioctl(v->device_fd, VHOST_VDPA_SET_GROUP_ASID, &asid); 434c1a10086SEugenio Pérez if (unlikely(r < 0)) { 435c1a10086SEugenio Pérez error_report("Can't set vq group %u asid %u, errno=%d (%s)", 436c1a10086SEugenio Pérez asid.index, asid.num, errno, g_strerror(errno)); 437c1a10086SEugenio Pérez } 438c1a10086SEugenio Pérez return r; 439c1a10086SEugenio Pérez } 440c1a10086SEugenio Pérez 4412df4dd31SEugenio Pérez static void vhost_vdpa_cvq_unmap_buf(struct vhost_vdpa *v, void *addr) 4422df4dd31SEugenio Pérez { 4432df4dd31SEugenio Pérez VhostIOVATree *tree = v->iova_tree; 4442df4dd31SEugenio Pérez DMAMap needle = { 4452df4dd31SEugenio Pérez /* 4462df4dd31SEugenio Pérez * No need to specify size or to look for more translations since 4472df4dd31SEugenio Pérez * this contiguous chunk was allocated by us. 4482df4dd31SEugenio Pérez */ 4492df4dd31SEugenio Pérez .translated_addr = (hwaddr)(uintptr_t)addr, 4502df4dd31SEugenio Pérez }; 4512df4dd31SEugenio Pérez const DMAMap *map = vhost_iova_tree_find_iova(tree, &needle); 4522df4dd31SEugenio Pérez int r; 4532df4dd31SEugenio Pérez 4542df4dd31SEugenio Pérez if (unlikely(!map)) { 4552df4dd31SEugenio Pérez error_report("Cannot locate expected map"); 4562df4dd31SEugenio Pérez return; 4572df4dd31SEugenio Pérez } 4582df4dd31SEugenio Pérez 459cd831ed5SEugenio Pérez r = vhost_vdpa_dma_unmap(v, v->address_space_id, map->iova, map->size + 1); 4602df4dd31SEugenio Pérez if (unlikely(r != 0)) { 4612df4dd31SEugenio Pérez error_report("Device cannot unmap: %s(%d)", g_strerror(r), r); 4622df4dd31SEugenio Pérez } 4632df4dd31SEugenio Pérez 46469292a8eSEugenio Pérez vhost_iova_tree_remove(tree, *map); 4652df4dd31SEugenio Pérez } 4662df4dd31SEugenio Pérez 4677a7f87e9SEugenio Pérez /** Map CVQ buffer. */ 4687a7f87e9SEugenio Pérez static int vhost_vdpa_cvq_map_buf(struct vhost_vdpa *v, void *buf, size_t size, 4697a7f87e9SEugenio Pérez bool write) 4702df4dd31SEugenio Pérez { 4712df4dd31SEugenio Pérez DMAMap map = {}; 4722df4dd31SEugenio Pérez int r; 4732df4dd31SEugenio Pérez 4742df4dd31SEugenio Pérez map.translated_addr = (hwaddr)(uintptr_t)buf; 4757a7f87e9SEugenio Pérez map.size = size - 1; 4762df4dd31SEugenio Pérez map.perm = write ? IOMMU_RW : IOMMU_RO, 4772df4dd31SEugenio Pérez r = vhost_iova_tree_map_alloc(v->iova_tree, &map); 4782df4dd31SEugenio Pérez if (unlikely(r != IOVA_OK)) { 4792df4dd31SEugenio Pérez error_report("Cannot map injected element"); 4807a7f87e9SEugenio Pérez return r; 4812df4dd31SEugenio Pérez } 4822df4dd31SEugenio Pérez 483cd831ed5SEugenio Pérez r = vhost_vdpa_dma_map(v, v->address_space_id, map.iova, 484cd831ed5SEugenio Pérez vhost_vdpa_net_cvq_cmd_page_len(), buf, !write); 4852df4dd31SEugenio Pérez if (unlikely(r < 0)) { 4862df4dd31SEugenio Pérez goto dma_map_err; 4872df4dd31SEugenio Pérez } 4882df4dd31SEugenio Pérez 4897a7f87e9SEugenio Pérez return 0; 4902df4dd31SEugenio Pérez 4912df4dd31SEugenio Pérez dma_map_err: 49269292a8eSEugenio Pérez vhost_iova_tree_remove(v->iova_tree, map); 4937a7f87e9SEugenio Pérez return r; 4942df4dd31SEugenio Pérez } 4952df4dd31SEugenio Pérez 4967a7f87e9SEugenio Pérez static int vhost_vdpa_net_cvq_start(NetClientState *nc) 4972df4dd31SEugenio Pérez { 49800ef422eSEugenio Pérez VhostVDPAState *s, *s0; 499c1a10086SEugenio Pérez struct vhost_vdpa *v; 500c1a10086SEugenio Pérez int64_t cvq_group; 501152128d6SEugenio Pérez int r; 502152128d6SEugenio Pérez Error *err = NULL; 5032df4dd31SEugenio Pérez 5047a7f87e9SEugenio Pérez assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 5057a7f87e9SEugenio Pérez 5067a7f87e9SEugenio Pérez s = DO_UPCAST(VhostVDPAState, nc, nc); 507c1a10086SEugenio Pérez v = &s->vhost_vdpa; 508c1a10086SEugenio Pérez 50969498430SEugenio Pérez s0 = vhost_vdpa_net_first_nc_vdpa(s); 51069498430SEugenio Pérez v->shadow_data = s0->vhost_vdpa.shadow_vqs_enabled; 511c1a10086SEugenio Pérez v->shadow_vqs_enabled = s->always_svq; 512c1a10086SEugenio Pérez s->vhost_vdpa.address_space_id = VHOST_VDPA_GUEST_PA_ASID; 513c1a10086SEugenio Pérez 51469498430SEugenio Pérez if (s->vhost_vdpa.shadow_data) { 515c1a10086SEugenio Pérez /* SVQ is already configured for all virtqueues */ 516c1a10086SEugenio Pérez goto out; 517c1a10086SEugenio Pérez } 518c1a10086SEugenio Pérez 519c1a10086SEugenio Pérez /* 520c1a10086SEugenio Pérez * If we early return in these cases SVQ will not be enabled. The migration 521c1a10086SEugenio Pérez * will be blocked as long as vhost-vdpa backends will not offer _F_LOG. 522c1a10086SEugenio Pérez */ 523152128d6SEugenio Pérez if (!vhost_vdpa_net_valid_svq_features(v->dev->features, NULL)) { 524c1a10086SEugenio Pérez return 0; 525c1a10086SEugenio Pérez } 526c1a10086SEugenio Pérez 527152128d6SEugenio Pérez if (!s->cvq_isolated) { 528152128d6SEugenio Pérez return 0; 529152128d6SEugenio Pérez } 530152128d6SEugenio Pérez 531152128d6SEugenio Pérez cvq_group = vhost_vdpa_get_vring_group(v->device_fd, 532152128d6SEugenio Pérez v->dev->vq_index_end - 1, 533152128d6SEugenio Pérez &err); 534c1a10086SEugenio Pérez if (unlikely(cvq_group < 0)) { 535152128d6SEugenio Pérez error_report_err(err); 536c1a10086SEugenio Pérez return cvq_group; 537c1a10086SEugenio Pérez } 538c1a10086SEugenio Pérez 539c1a10086SEugenio Pérez r = vhost_vdpa_set_address_space_id(v, cvq_group, VHOST_VDPA_NET_CVQ_ASID); 540c1a10086SEugenio Pérez if (unlikely(r < 0)) { 541c1a10086SEugenio Pérez return r; 542c1a10086SEugenio Pérez } 543c1a10086SEugenio Pérez 544c1a10086SEugenio Pérez v->shadow_vqs_enabled = true; 545c1a10086SEugenio Pérez s->vhost_vdpa.address_space_id = VHOST_VDPA_NET_CVQ_ASID; 546c1a10086SEugenio Pérez 547c1a10086SEugenio Pérez out: 5487a7f87e9SEugenio Pérez if (!s->vhost_vdpa.shadow_vqs_enabled) { 5497a7f87e9SEugenio Pérez return 0; 5502df4dd31SEugenio Pérez } 5512df4dd31SEugenio Pérez 55200ef422eSEugenio Pérez if (s0->vhost_vdpa.iova_tree) { 55300ef422eSEugenio Pérez /* 55400ef422eSEugenio Pérez * SVQ is already configured for all virtqueues. Reuse IOVA tree for 55500ef422eSEugenio Pérez * simplicity, whether CVQ shares ASID with guest or not, because: 55600ef422eSEugenio Pérez * - Memory listener need access to guest's memory addresses allocated 55700ef422eSEugenio Pérez * in the IOVA tree. 55800ef422eSEugenio Pérez * - There should be plenty of IOVA address space for both ASID not to 55900ef422eSEugenio Pérez * worry about collisions between them. Guest's translations are 56000ef422eSEugenio Pérez * still validated with virtio virtqueue_pop so there is no risk for 56100ef422eSEugenio Pérez * the guest to access memory that it shouldn't. 56200ef422eSEugenio Pérez * 56300ef422eSEugenio Pérez * To allocate a iova tree per ASID is doable but it complicates the 56400ef422eSEugenio Pérez * code and it is not worth it for the moment. 56500ef422eSEugenio Pérez */ 56600ef422eSEugenio Pérez v->iova_tree = s0->vhost_vdpa.iova_tree; 56700ef422eSEugenio Pérez } else { 56800ef422eSEugenio Pérez v->iova_tree = vhost_iova_tree_new(v->iova_range.first, 56900ef422eSEugenio Pérez v->iova_range.last); 57000ef422eSEugenio Pérez } 57100ef422eSEugenio Pérez 5727a7f87e9SEugenio Pérez r = vhost_vdpa_cvq_map_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer, 5737a7f87e9SEugenio Pérez vhost_vdpa_net_cvq_cmd_page_len(), false); 5747a7f87e9SEugenio Pérez if (unlikely(r < 0)) { 5757a7f87e9SEugenio Pérez return r; 5767a7f87e9SEugenio Pérez } 5777a7f87e9SEugenio Pérez 57817fb889fSEugenio Pérez r = vhost_vdpa_cvq_map_buf(&s->vhost_vdpa, s->status, 5797a7f87e9SEugenio Pérez vhost_vdpa_net_cvq_cmd_page_len(), true); 5807a7f87e9SEugenio Pérez if (unlikely(r < 0)) { 5812df4dd31SEugenio Pérez vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer); 5822df4dd31SEugenio Pérez } 5832df4dd31SEugenio Pérez 5847a7f87e9SEugenio Pérez return r; 5857a7f87e9SEugenio Pérez } 5867a7f87e9SEugenio Pérez 5877a7f87e9SEugenio Pérez static void vhost_vdpa_net_cvq_stop(NetClientState *nc) 5887a7f87e9SEugenio Pérez { 5897a7f87e9SEugenio Pérez VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); 5907a7f87e9SEugenio Pérez 5917a7f87e9SEugenio Pérez assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 5927a7f87e9SEugenio Pérez 5937a7f87e9SEugenio Pérez if (s->vhost_vdpa.shadow_vqs_enabled) { 5947a7f87e9SEugenio Pérez vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer); 59517fb889fSEugenio Pérez vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->status); 596c1a10086SEugenio Pérez } 59700ef422eSEugenio Pérez 59800ef422eSEugenio Pérez vhost_vdpa_net_client_stop(nc); 5992df4dd31SEugenio Pérez } 6002df4dd31SEugenio Pérez 601be4278b6SEugenio Pérez static ssize_t vhost_vdpa_net_cvq_add(VhostVDPAState *s, size_t out_len, 602be4278b6SEugenio Pérez size_t in_len) 603be4278b6SEugenio Pérez { 604be4278b6SEugenio Pérez /* Buffers for the device */ 605be4278b6SEugenio Pérez const struct iovec out = { 606be4278b6SEugenio Pérez .iov_base = s->cvq_cmd_out_buffer, 607be4278b6SEugenio Pérez .iov_len = out_len, 608be4278b6SEugenio Pérez }; 609be4278b6SEugenio Pérez const struct iovec in = { 61017fb889fSEugenio Pérez .iov_base = s->status, 611be4278b6SEugenio Pérez .iov_len = sizeof(virtio_net_ctrl_ack), 612be4278b6SEugenio Pérez }; 613be4278b6SEugenio Pérez VhostShadowVirtqueue *svq = g_ptr_array_index(s->vhost_vdpa.shadow_vqs, 0); 614be4278b6SEugenio Pérez int r; 615be4278b6SEugenio Pérez 616be4278b6SEugenio Pérez r = vhost_svq_add(svq, &out, 1, &in, 1, NULL); 617be4278b6SEugenio Pérez if (unlikely(r != 0)) { 618be4278b6SEugenio Pérez if (unlikely(r == -ENOSPC)) { 619be4278b6SEugenio Pérez qemu_log_mask(LOG_GUEST_ERROR, "%s: No space on device queue\n", 620be4278b6SEugenio Pérez __func__); 621be4278b6SEugenio Pérez } 622be4278b6SEugenio Pérez return r; 623be4278b6SEugenio Pérez } 624be4278b6SEugenio Pérez 625be4278b6SEugenio Pérez /* 626be4278b6SEugenio Pérez * We can poll here since we've had BQL from the time we sent the 627be4278b6SEugenio Pérez * descriptor. Also, we need to take the answer before SVQ pulls by itself, 628be4278b6SEugenio Pérez * when BQL is released 629be4278b6SEugenio Pérez */ 630be4278b6SEugenio Pérez return vhost_svq_poll(svq); 631be4278b6SEugenio Pérez } 632be4278b6SEugenio Pérez 633f73c0c43SEugenio Pérez static ssize_t vhost_vdpa_net_load_cmd(VhostVDPAState *s, uint8_t class, 6342848c6aaSHawkins Jiawei uint8_t cmd, const struct iovec *data_sg, 6352848c6aaSHawkins Jiawei size_t data_num) 636f73c0c43SEugenio Pérez { 637f73c0c43SEugenio Pérez const struct virtio_net_ctrl_hdr ctrl = { 638f73c0c43SEugenio Pérez .class = class, 639f73c0c43SEugenio Pérez .cmd = cmd, 640f73c0c43SEugenio Pérez }; 6412848c6aaSHawkins Jiawei size_t data_size = iov_size(data_sg, data_num); 642f73c0c43SEugenio Pérez 643f73c0c43SEugenio Pérez assert(data_size < vhost_vdpa_net_cvq_cmd_page_len() - sizeof(ctrl)); 644f73c0c43SEugenio Pérez 6452848c6aaSHawkins Jiawei /* pack the CVQ command header */ 646f73c0c43SEugenio Pérez memcpy(s->cvq_cmd_out_buffer, &ctrl, sizeof(ctrl)); 647f73c0c43SEugenio Pérez 6482848c6aaSHawkins Jiawei /* pack the CVQ command command-specific-data */ 6492848c6aaSHawkins Jiawei iov_to_buf(data_sg, data_num, 0, 6502848c6aaSHawkins Jiawei s->cvq_cmd_out_buffer + sizeof(ctrl), data_size); 6512848c6aaSHawkins Jiawei 6522848c6aaSHawkins Jiawei return vhost_vdpa_net_cvq_add(s, data_size + sizeof(ctrl), 653f73c0c43SEugenio Pérez sizeof(virtio_net_ctrl_ack)); 654f73c0c43SEugenio Pérez } 655f73c0c43SEugenio Pérez 656f73c0c43SEugenio Pérez static int vhost_vdpa_net_load_mac(VhostVDPAState *s, const VirtIONet *n) 657f73c0c43SEugenio Pérez { 65802d3bf09SHawkins Jiawei if (virtio_vdev_has_feature(&n->parent_obj, VIRTIO_NET_F_CTRL_MAC_ADDR)) { 6592848c6aaSHawkins Jiawei const struct iovec data = { 6602848c6aaSHawkins Jiawei .iov_base = (void *)n->mac, 6612848c6aaSHawkins Jiawei .iov_len = sizeof(n->mac), 6622848c6aaSHawkins Jiawei }; 663f73c0c43SEugenio Pérez ssize_t dev_written = vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_MAC, 664f73c0c43SEugenio Pérez VIRTIO_NET_CTRL_MAC_ADDR_SET, 6652848c6aaSHawkins Jiawei &data, 1); 666f73c0c43SEugenio Pérez if (unlikely(dev_written < 0)) { 667f73c0c43SEugenio Pérez return dev_written; 668f73c0c43SEugenio Pérez } 669b479bc3cSHawkins Jiawei if (*s->status != VIRTIO_NET_OK) { 670b479bc3cSHawkins Jiawei return -EIO; 671b479bc3cSHawkins Jiawei } 672f73c0c43SEugenio Pérez } 673f73c0c43SEugenio Pérez 6740ddcecb8SHawkins Jiawei /* 6750ddcecb8SHawkins Jiawei * According to VirtIO standard, "The device MUST have an 6760ddcecb8SHawkins Jiawei * empty MAC filtering table on reset.". 6770ddcecb8SHawkins Jiawei * 6780ddcecb8SHawkins Jiawei * Therefore, there is no need to send this CVQ command if the 6790ddcecb8SHawkins Jiawei * driver also sets an empty MAC filter table, which aligns with 6800ddcecb8SHawkins Jiawei * the device's defaults. 6810ddcecb8SHawkins Jiawei * 6820ddcecb8SHawkins Jiawei * Note that the device's defaults can mismatch the driver's 6830ddcecb8SHawkins Jiawei * configuration only at live migration. 6840ddcecb8SHawkins Jiawei */ 6850ddcecb8SHawkins Jiawei if (!virtio_vdev_has_feature(&n->parent_obj, VIRTIO_NET_F_CTRL_RX) || 6860ddcecb8SHawkins Jiawei n->mac_table.in_use == 0) { 6870ddcecb8SHawkins Jiawei return 0; 6880ddcecb8SHawkins Jiawei } 6890ddcecb8SHawkins Jiawei 6900ddcecb8SHawkins Jiawei uint32_t uni_entries = n->mac_table.first_multi, 6910ddcecb8SHawkins Jiawei uni_macs_size = uni_entries * ETH_ALEN, 6920ddcecb8SHawkins Jiawei mul_entries = n->mac_table.in_use - uni_entries, 6930ddcecb8SHawkins Jiawei mul_macs_size = mul_entries * ETH_ALEN; 6940ddcecb8SHawkins Jiawei struct virtio_net_ctrl_mac uni = { 6950ddcecb8SHawkins Jiawei .entries = cpu_to_le32(uni_entries), 6960ddcecb8SHawkins Jiawei }; 6970ddcecb8SHawkins Jiawei struct virtio_net_ctrl_mac mul = { 6980ddcecb8SHawkins Jiawei .entries = cpu_to_le32(mul_entries), 6990ddcecb8SHawkins Jiawei }; 7000ddcecb8SHawkins Jiawei const struct iovec data[] = { 7010ddcecb8SHawkins Jiawei { 7020ddcecb8SHawkins Jiawei .iov_base = &uni, 7030ddcecb8SHawkins Jiawei .iov_len = sizeof(uni), 7040ddcecb8SHawkins Jiawei }, { 7050ddcecb8SHawkins Jiawei .iov_base = n->mac_table.macs, 7060ddcecb8SHawkins Jiawei .iov_len = uni_macs_size, 7070ddcecb8SHawkins Jiawei }, { 7080ddcecb8SHawkins Jiawei .iov_base = &mul, 7090ddcecb8SHawkins Jiawei .iov_len = sizeof(mul), 7100ddcecb8SHawkins Jiawei }, { 7110ddcecb8SHawkins Jiawei .iov_base = &n->mac_table.macs[uni_macs_size], 7120ddcecb8SHawkins Jiawei .iov_len = mul_macs_size, 7130ddcecb8SHawkins Jiawei }, 7140ddcecb8SHawkins Jiawei }; 7150ddcecb8SHawkins Jiawei ssize_t dev_written = vhost_vdpa_net_load_cmd(s, 7160ddcecb8SHawkins Jiawei VIRTIO_NET_CTRL_MAC, 7170ddcecb8SHawkins Jiawei VIRTIO_NET_CTRL_MAC_TABLE_SET, 7180ddcecb8SHawkins Jiawei data, ARRAY_SIZE(data)); 7190ddcecb8SHawkins Jiawei if (unlikely(dev_written < 0)) { 7200ddcecb8SHawkins Jiawei return dev_written; 7210ddcecb8SHawkins Jiawei } 7220ddcecb8SHawkins Jiawei if (*s->status != VIRTIO_NET_OK) { 7230ddcecb8SHawkins Jiawei return -EIO; 7240ddcecb8SHawkins Jiawei } 7250ddcecb8SHawkins Jiawei 726f73c0c43SEugenio Pérez return 0; 727f73c0c43SEugenio Pérez } 728f73c0c43SEugenio Pérez 729f64c7cdaSEugenio Pérez static int vhost_vdpa_net_load_mq(VhostVDPAState *s, 730f64c7cdaSEugenio Pérez const VirtIONet *n) 731f64c7cdaSEugenio Pérez { 732f64c7cdaSEugenio Pérez struct virtio_net_ctrl_mq mq; 733f64c7cdaSEugenio Pérez ssize_t dev_written; 734f64c7cdaSEugenio Pérez 73502d3bf09SHawkins Jiawei if (!virtio_vdev_has_feature(&n->parent_obj, VIRTIO_NET_F_MQ)) { 736f64c7cdaSEugenio Pérez return 0; 737f64c7cdaSEugenio Pérez } 738f64c7cdaSEugenio Pérez 739f64c7cdaSEugenio Pérez mq.virtqueue_pairs = cpu_to_le16(n->curr_queue_pairs); 7402848c6aaSHawkins Jiawei const struct iovec data = { 7412848c6aaSHawkins Jiawei .iov_base = &mq, 7422848c6aaSHawkins Jiawei .iov_len = sizeof(mq), 7432848c6aaSHawkins Jiawei }; 744f64c7cdaSEugenio Pérez dev_written = vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_MQ, 7452848c6aaSHawkins Jiawei VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET, 7462848c6aaSHawkins Jiawei &data, 1); 747f64c7cdaSEugenio Pérez if (unlikely(dev_written < 0)) { 748f64c7cdaSEugenio Pérez return dev_written; 749f64c7cdaSEugenio Pérez } 750f45fd95eSHawkins Jiawei if (*s->status != VIRTIO_NET_OK) { 751f45fd95eSHawkins Jiawei return -EIO; 752f45fd95eSHawkins Jiawei } 753f64c7cdaSEugenio Pérez 754f45fd95eSHawkins Jiawei return 0; 755f64c7cdaSEugenio Pérez } 756f64c7cdaSEugenio Pérez 7570b58d368SHawkins Jiawei static int vhost_vdpa_net_load_offloads(VhostVDPAState *s, 7580b58d368SHawkins Jiawei const VirtIONet *n) 7590b58d368SHawkins Jiawei { 7600b58d368SHawkins Jiawei uint64_t offloads; 7610b58d368SHawkins Jiawei ssize_t dev_written; 7620b58d368SHawkins Jiawei 7630b58d368SHawkins Jiawei if (!virtio_vdev_has_feature(&n->parent_obj, 7640b58d368SHawkins Jiawei VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) { 7650b58d368SHawkins Jiawei return 0; 7660b58d368SHawkins Jiawei } 7670b58d368SHawkins Jiawei 7680b58d368SHawkins Jiawei if (n->curr_guest_offloads == virtio_net_supported_guest_offloads(n)) { 7690b58d368SHawkins Jiawei /* 7700b58d368SHawkins Jiawei * According to VirtIO standard, "Upon feature negotiation 7710b58d368SHawkins Jiawei * corresponding offload gets enabled to preserve 7720b58d368SHawkins Jiawei * backward compatibility.". 7730b58d368SHawkins Jiawei * 7740b58d368SHawkins Jiawei * Therefore, there is no need to send this CVQ command if the 7750b58d368SHawkins Jiawei * driver also enables all supported offloads, which aligns with 7760b58d368SHawkins Jiawei * the device's defaults. 7770b58d368SHawkins Jiawei * 7780b58d368SHawkins Jiawei * Note that the device's defaults can mismatch the driver's 7790b58d368SHawkins Jiawei * configuration only at live migration. 7800b58d368SHawkins Jiawei */ 7810b58d368SHawkins Jiawei return 0; 7820b58d368SHawkins Jiawei } 7830b58d368SHawkins Jiawei 7840b58d368SHawkins Jiawei offloads = cpu_to_le64(n->curr_guest_offloads); 7852848c6aaSHawkins Jiawei const struct iovec data = { 7862848c6aaSHawkins Jiawei .iov_base = &offloads, 7872848c6aaSHawkins Jiawei .iov_len = sizeof(offloads), 7882848c6aaSHawkins Jiawei }; 7890b58d368SHawkins Jiawei dev_written = vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_GUEST_OFFLOADS, 7900b58d368SHawkins Jiawei VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET, 7912848c6aaSHawkins Jiawei &data, 1); 7920b58d368SHawkins Jiawei if (unlikely(dev_written < 0)) { 7930b58d368SHawkins Jiawei return dev_written; 7940b58d368SHawkins Jiawei } 7956f348071SHawkins Jiawei if (*s->status != VIRTIO_NET_OK) { 7966f348071SHawkins Jiawei return -EIO; 7976f348071SHawkins Jiawei } 7980b58d368SHawkins Jiawei 7996f348071SHawkins Jiawei return 0; 8000b58d368SHawkins Jiawei } 8010b58d368SHawkins Jiawei 802b12f907eSHawkins Jiawei static int vhost_vdpa_net_load_rx_mode(VhostVDPAState *s, 803b12f907eSHawkins Jiawei uint8_t cmd, 804b12f907eSHawkins Jiawei uint8_t on) 805b12f907eSHawkins Jiawei { 806b12f907eSHawkins Jiawei const struct iovec data = { 807b12f907eSHawkins Jiawei .iov_base = &on, 808b12f907eSHawkins Jiawei .iov_len = sizeof(on), 809b12f907eSHawkins Jiawei }; 810b12f907eSHawkins Jiawei return vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_RX, 811b12f907eSHawkins Jiawei cmd, &data, 1); 812b12f907eSHawkins Jiawei } 813b12f907eSHawkins Jiawei 814b12f907eSHawkins Jiawei static int vhost_vdpa_net_load_rx(VhostVDPAState *s, 815b12f907eSHawkins Jiawei const VirtIONet *n) 816b12f907eSHawkins Jiawei { 817b12f907eSHawkins Jiawei ssize_t dev_written; 818b12f907eSHawkins Jiawei 819b12f907eSHawkins Jiawei if (!virtio_vdev_has_feature(&n->parent_obj, VIRTIO_NET_F_CTRL_RX)) { 820b12f907eSHawkins Jiawei return 0; 821b12f907eSHawkins Jiawei } 822b12f907eSHawkins Jiawei 823b12f907eSHawkins Jiawei /* 824b12f907eSHawkins Jiawei * According to virtio_net_reset(), device turns promiscuous mode 825b12f907eSHawkins Jiawei * on by default. 826b12f907eSHawkins Jiawei * 8270a19d879SMichael Tokarev * Additionally, according to VirtIO standard, "Since there are 828b12f907eSHawkins Jiawei * no guarantees, it can use a hash filter or silently switch to 829b12f907eSHawkins Jiawei * allmulti or promiscuous mode if it is given too many addresses.". 830b12f907eSHawkins Jiawei * QEMU marks `n->mac_table.uni_overflow` if guest sets too many 831b12f907eSHawkins Jiawei * non-multicast MAC addresses, indicating that promiscuous mode 832b12f907eSHawkins Jiawei * should be enabled. 833b12f907eSHawkins Jiawei * 834b12f907eSHawkins Jiawei * Therefore, QEMU should only send this CVQ command if the 835b12f907eSHawkins Jiawei * `n->mac_table.uni_overflow` is not marked and `n->promisc` is off, 836b12f907eSHawkins Jiawei * which sets promiscuous mode on, different from the device's defaults. 837b12f907eSHawkins Jiawei * 838b12f907eSHawkins Jiawei * Note that the device's defaults can mismatch the driver's 839b12f907eSHawkins Jiawei * configuration only at live migration. 840b12f907eSHawkins Jiawei */ 841b12f907eSHawkins Jiawei if (!n->mac_table.uni_overflow && !n->promisc) { 842b12f907eSHawkins Jiawei dev_written = vhost_vdpa_net_load_rx_mode(s, 843b12f907eSHawkins Jiawei VIRTIO_NET_CTRL_RX_PROMISC, 0); 844b12f907eSHawkins Jiawei if (unlikely(dev_written < 0)) { 845b12f907eSHawkins Jiawei return dev_written; 846b12f907eSHawkins Jiawei } 847b12f907eSHawkins Jiawei if (*s->status != VIRTIO_NET_OK) { 848b12f907eSHawkins Jiawei return -EIO; 849b12f907eSHawkins Jiawei } 850b12f907eSHawkins Jiawei } 851b12f907eSHawkins Jiawei 852b12f907eSHawkins Jiawei /* 853b12f907eSHawkins Jiawei * According to virtio_net_reset(), device turns all-multicast mode 854b12f907eSHawkins Jiawei * off by default. 855b12f907eSHawkins Jiawei * 856b12f907eSHawkins Jiawei * According to VirtIO standard, "Since there are no guarantees, 857b12f907eSHawkins Jiawei * it can use a hash filter or silently switch to allmulti or 858b12f907eSHawkins Jiawei * promiscuous mode if it is given too many addresses.". QEMU marks 859b12f907eSHawkins Jiawei * `n->mac_table.multi_overflow` if guest sets too many 860b12f907eSHawkins Jiawei * non-multicast MAC addresses. 861b12f907eSHawkins Jiawei * 862b12f907eSHawkins Jiawei * Therefore, QEMU should only send this CVQ command if the 863b12f907eSHawkins Jiawei * `n->mac_table.multi_overflow` is marked or `n->allmulti` is on, 864b12f907eSHawkins Jiawei * which sets all-multicast mode on, different from the device's defaults. 865b12f907eSHawkins Jiawei * 866b12f907eSHawkins Jiawei * Note that the device's defaults can mismatch the driver's 867b12f907eSHawkins Jiawei * configuration only at live migration. 868b12f907eSHawkins Jiawei */ 869b12f907eSHawkins Jiawei if (n->mac_table.multi_overflow || n->allmulti) { 870b12f907eSHawkins Jiawei dev_written = vhost_vdpa_net_load_rx_mode(s, 871b12f907eSHawkins Jiawei VIRTIO_NET_CTRL_RX_ALLMULTI, 1); 872b12f907eSHawkins Jiawei if (unlikely(dev_written < 0)) { 873b12f907eSHawkins Jiawei return dev_written; 874b12f907eSHawkins Jiawei } 875b12f907eSHawkins Jiawei if (*s->status != VIRTIO_NET_OK) { 876b12f907eSHawkins Jiawei return -EIO; 877b12f907eSHawkins Jiawei } 878b12f907eSHawkins Jiawei } 879b12f907eSHawkins Jiawei 8804fd180c7SHawkins Jiawei if (!virtio_vdev_has_feature(&n->parent_obj, VIRTIO_NET_F_CTRL_RX_EXTRA)) { 8814fd180c7SHawkins Jiawei return 0; 8824fd180c7SHawkins Jiawei } 8834fd180c7SHawkins Jiawei 8844fd180c7SHawkins Jiawei /* 8854fd180c7SHawkins Jiawei * According to virtio_net_reset(), device turns all-unicast mode 8864fd180c7SHawkins Jiawei * off by default. 8874fd180c7SHawkins Jiawei * 8884fd180c7SHawkins Jiawei * Therefore, QEMU should only send this CVQ command if the driver 8894fd180c7SHawkins Jiawei * sets all-unicast mode on, different from the device's defaults. 8904fd180c7SHawkins Jiawei * 8914fd180c7SHawkins Jiawei * Note that the device's defaults can mismatch the driver's 8924fd180c7SHawkins Jiawei * configuration only at live migration. 8934fd180c7SHawkins Jiawei */ 8944fd180c7SHawkins Jiawei if (n->alluni) { 8954fd180c7SHawkins Jiawei dev_written = vhost_vdpa_net_load_rx_mode(s, 8964fd180c7SHawkins Jiawei VIRTIO_NET_CTRL_RX_ALLUNI, 1); 8974fd180c7SHawkins Jiawei if (dev_written < 0) { 8984fd180c7SHawkins Jiawei return dev_written; 8994fd180c7SHawkins Jiawei } 9004fd180c7SHawkins Jiawei if (*s->status != VIRTIO_NET_OK) { 9014fd180c7SHawkins Jiawei return -EIO; 9024fd180c7SHawkins Jiawei } 9034fd180c7SHawkins Jiawei } 9044fd180c7SHawkins Jiawei 9054fd180c7SHawkins Jiawei /* 9064fd180c7SHawkins Jiawei * According to virtio_net_reset(), device turns non-multicast mode 9074fd180c7SHawkins Jiawei * off by default. 9084fd180c7SHawkins Jiawei * 9094fd180c7SHawkins Jiawei * Therefore, QEMU should only send this CVQ command if the driver 9104fd180c7SHawkins Jiawei * sets non-multicast mode on, different from the device's defaults. 9114fd180c7SHawkins Jiawei * 9124fd180c7SHawkins Jiawei * Note that the device's defaults can mismatch the driver's 9134fd180c7SHawkins Jiawei * configuration only at live migration. 9144fd180c7SHawkins Jiawei */ 9154fd180c7SHawkins Jiawei if (n->nomulti) { 9164fd180c7SHawkins Jiawei dev_written = vhost_vdpa_net_load_rx_mode(s, 9174fd180c7SHawkins Jiawei VIRTIO_NET_CTRL_RX_NOMULTI, 1); 9184fd180c7SHawkins Jiawei if (dev_written < 0) { 9194fd180c7SHawkins Jiawei return dev_written; 9204fd180c7SHawkins Jiawei } 9214fd180c7SHawkins Jiawei if (*s->status != VIRTIO_NET_OK) { 9224fd180c7SHawkins Jiawei return -EIO; 9234fd180c7SHawkins Jiawei } 9244fd180c7SHawkins Jiawei } 9254fd180c7SHawkins Jiawei 9264fd180c7SHawkins Jiawei /* 9274fd180c7SHawkins Jiawei * According to virtio_net_reset(), device turns non-unicast mode 9284fd180c7SHawkins Jiawei * off by default. 9294fd180c7SHawkins Jiawei * 9304fd180c7SHawkins Jiawei * Therefore, QEMU should only send this CVQ command if the driver 9314fd180c7SHawkins Jiawei * sets non-unicast mode on, different from the device's defaults. 9324fd180c7SHawkins Jiawei * 9334fd180c7SHawkins Jiawei * Note that the device's defaults can mismatch the driver's 9344fd180c7SHawkins Jiawei * configuration only at live migration. 9354fd180c7SHawkins Jiawei */ 9364fd180c7SHawkins Jiawei if (n->nouni) { 9374fd180c7SHawkins Jiawei dev_written = vhost_vdpa_net_load_rx_mode(s, 9384fd180c7SHawkins Jiawei VIRTIO_NET_CTRL_RX_NOUNI, 1); 9394fd180c7SHawkins Jiawei if (dev_written < 0) { 9404fd180c7SHawkins Jiawei return dev_written; 9414fd180c7SHawkins Jiawei } 9424fd180c7SHawkins Jiawei if (*s->status != VIRTIO_NET_OK) { 9434fd180c7SHawkins Jiawei return -EIO; 9444fd180c7SHawkins Jiawei } 9454fd180c7SHawkins Jiawei } 9464fd180c7SHawkins Jiawei 9474fd180c7SHawkins Jiawei /* 9484fd180c7SHawkins Jiawei * According to virtio_net_reset(), device turns non-broadcast mode 9494fd180c7SHawkins Jiawei * off by default. 9504fd180c7SHawkins Jiawei * 9514fd180c7SHawkins Jiawei * Therefore, QEMU should only send this CVQ command if the driver 9524fd180c7SHawkins Jiawei * sets non-broadcast mode on, different from the device's defaults. 9534fd180c7SHawkins Jiawei * 9544fd180c7SHawkins Jiawei * Note that the device's defaults can mismatch the driver's 9554fd180c7SHawkins Jiawei * configuration only at live migration. 9564fd180c7SHawkins Jiawei */ 9574fd180c7SHawkins Jiawei if (n->nobcast) { 9584fd180c7SHawkins Jiawei dev_written = vhost_vdpa_net_load_rx_mode(s, 9594fd180c7SHawkins Jiawei VIRTIO_NET_CTRL_RX_NOBCAST, 1); 9604fd180c7SHawkins Jiawei if (dev_written < 0) { 9614fd180c7SHawkins Jiawei return dev_written; 9624fd180c7SHawkins Jiawei } 9634fd180c7SHawkins Jiawei if (*s->status != VIRTIO_NET_OK) { 9644fd180c7SHawkins Jiawei return -EIO; 9654fd180c7SHawkins Jiawei } 9664fd180c7SHawkins Jiawei } 9674fd180c7SHawkins Jiawei 968b12f907eSHawkins Jiawei return 0; 969b12f907eSHawkins Jiawei } 970b12f907eSHawkins Jiawei 971dd036d8dSEugenio Pérez static int vhost_vdpa_net_load(NetClientState *nc) 972dd036d8dSEugenio Pérez { 973dd036d8dSEugenio Pérez VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); 974f73c0c43SEugenio Pérez struct vhost_vdpa *v = &s->vhost_vdpa; 975dd036d8dSEugenio Pérez const VirtIONet *n; 976f73c0c43SEugenio Pérez int r; 977dd036d8dSEugenio Pérez 978dd036d8dSEugenio Pérez assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 979dd036d8dSEugenio Pérez 980dd036d8dSEugenio Pérez if (!v->shadow_vqs_enabled) { 981dd036d8dSEugenio Pérez return 0; 982dd036d8dSEugenio Pérez } 983dd036d8dSEugenio Pérez 984dd036d8dSEugenio Pérez n = VIRTIO_NET(v->dev->vdev); 985f73c0c43SEugenio Pérez r = vhost_vdpa_net_load_mac(s, n); 986f73c0c43SEugenio Pérez if (unlikely(r < 0)) { 987f73c0c43SEugenio Pérez return r; 988dd036d8dSEugenio Pérez } 989f64c7cdaSEugenio Pérez r = vhost_vdpa_net_load_mq(s, n); 990f64c7cdaSEugenio Pérez if (unlikely(r)) { 991f64c7cdaSEugenio Pérez return r; 992f64c7cdaSEugenio Pérez } 9930b58d368SHawkins Jiawei r = vhost_vdpa_net_load_offloads(s, n); 9940b58d368SHawkins Jiawei if (unlikely(r)) { 9950b58d368SHawkins Jiawei return r; 9960b58d368SHawkins Jiawei } 997b12f907eSHawkins Jiawei r = vhost_vdpa_net_load_rx(s, n); 998b12f907eSHawkins Jiawei if (unlikely(r)) { 999b12f907eSHawkins Jiawei return r; 1000b12f907eSHawkins Jiawei } 1001dd036d8dSEugenio Pérez 1002dd036d8dSEugenio Pérez return 0; 1003dd036d8dSEugenio Pérez } 1004dd036d8dSEugenio Pérez 1005f8972b56SEugenio Pérez static NetClientInfo net_vhost_vdpa_cvq_info = { 1006f8972b56SEugenio Pérez .type = NET_CLIENT_DRIVER_VHOST_VDPA, 1007f8972b56SEugenio Pérez .size = sizeof(VhostVDPAState), 1008f8972b56SEugenio Pérez .receive = vhost_vdpa_receive, 10097a7f87e9SEugenio Pérez .start = vhost_vdpa_net_cvq_start, 1010dd036d8dSEugenio Pérez .load = vhost_vdpa_net_load, 10117a7f87e9SEugenio Pérez .stop = vhost_vdpa_net_cvq_stop, 1012f8972b56SEugenio Pérez .cleanup = vhost_vdpa_cleanup, 1013f8972b56SEugenio Pérez .has_vnet_hdr = vhost_vdpa_has_vnet_hdr, 1014f8972b56SEugenio Pérez .has_ufo = vhost_vdpa_has_ufo, 1015f8972b56SEugenio Pérez .check_peer_type = vhost_vdpa_check_peer_type, 1016f8972b56SEugenio Pérez }; 1017f8972b56SEugenio Pérez 1018fee364e4SHawkins Jiawei /* 1019fee364e4SHawkins Jiawei * Forward the excessive VIRTIO_NET_CTRL_MAC_TABLE_SET CVQ command to 1020fee364e4SHawkins Jiawei * vdpa device. 1021fee364e4SHawkins Jiawei * 1022fee364e4SHawkins Jiawei * Considering that QEMU cannot send the entire filter table to the 1023fee364e4SHawkins Jiawei * vdpa device, it should send the VIRTIO_NET_CTRL_RX_PROMISC CVQ 1024fee364e4SHawkins Jiawei * command to enable promiscuous mode to receive all packets, 1025fee364e4SHawkins Jiawei * according to VirtIO standard, "Since there are no guarantees, 1026fee364e4SHawkins Jiawei * it can use a hash filter or silently switch to allmulti or 1027fee364e4SHawkins Jiawei * promiscuous mode if it is given too many addresses.". 1028fee364e4SHawkins Jiawei * 1029fee364e4SHawkins Jiawei * Since QEMU ignores MAC addresses beyond `MAC_TABLE_ENTRIES` and 1030fee364e4SHawkins Jiawei * marks `n->mac_table.x_overflow` accordingly, it should have 1031fee364e4SHawkins Jiawei * the same effect on the device model to receive 1032fee364e4SHawkins Jiawei * (`MAC_TABLE_ENTRIES` + 1) or more non-multicast MAC addresses. 1033fee364e4SHawkins Jiawei * The same applies to multicast MAC addresses. 1034fee364e4SHawkins Jiawei * 1035fee364e4SHawkins Jiawei * Therefore, QEMU can provide the device model with a fake 1036fee364e4SHawkins Jiawei * VIRTIO_NET_CTRL_MAC_TABLE_SET command with (`MAC_TABLE_ENTRIES` + 1) 1037fee364e4SHawkins Jiawei * non-multicast MAC addresses and (`MAC_TABLE_ENTRIES` + 1) multicast 1038fee364e4SHawkins Jiawei * MAC addresses. This ensures that the device model marks 1039fee364e4SHawkins Jiawei * `n->mac_table.uni_overflow` and `n->mac_table.multi_overflow`, 1040fee364e4SHawkins Jiawei * allowing all packets to be received, which aligns with the 1041fee364e4SHawkins Jiawei * state of the vdpa device. 1042fee364e4SHawkins Jiawei */ 1043fee364e4SHawkins Jiawei static int vhost_vdpa_net_excessive_mac_filter_cvq_add(VhostVDPAState *s, 1044fee364e4SHawkins Jiawei VirtQueueElement *elem, 1045fee364e4SHawkins Jiawei struct iovec *out) 1046fee364e4SHawkins Jiawei { 1047fee364e4SHawkins Jiawei struct virtio_net_ctrl_mac mac_data, *mac_ptr; 1048fee364e4SHawkins Jiawei struct virtio_net_ctrl_hdr *hdr_ptr; 1049fee364e4SHawkins Jiawei uint32_t cursor; 1050fee364e4SHawkins Jiawei ssize_t r; 1051fee364e4SHawkins Jiawei 1052fee364e4SHawkins Jiawei /* parse the non-multicast MAC address entries from CVQ command */ 1053fee364e4SHawkins Jiawei cursor = sizeof(*hdr_ptr); 1054fee364e4SHawkins Jiawei r = iov_to_buf(elem->out_sg, elem->out_num, cursor, 1055fee364e4SHawkins Jiawei &mac_data, sizeof(mac_data)); 1056fee364e4SHawkins Jiawei if (unlikely(r != sizeof(mac_data))) { 1057fee364e4SHawkins Jiawei /* 1058fee364e4SHawkins Jiawei * If the CVQ command is invalid, we should simulate the vdpa device 1059fee364e4SHawkins Jiawei * to reject the VIRTIO_NET_CTRL_MAC_TABLE_SET CVQ command 1060fee364e4SHawkins Jiawei */ 1061fee364e4SHawkins Jiawei *s->status = VIRTIO_NET_ERR; 1062fee364e4SHawkins Jiawei return sizeof(*s->status); 1063fee364e4SHawkins Jiawei } 1064fee364e4SHawkins Jiawei cursor += sizeof(mac_data) + le32_to_cpu(mac_data.entries) * ETH_ALEN; 1065fee364e4SHawkins Jiawei 1066fee364e4SHawkins Jiawei /* parse the multicast MAC address entries from CVQ command */ 1067fee364e4SHawkins Jiawei r = iov_to_buf(elem->out_sg, elem->out_num, cursor, 1068fee364e4SHawkins Jiawei &mac_data, sizeof(mac_data)); 1069fee364e4SHawkins Jiawei if (r != sizeof(mac_data)) { 1070fee364e4SHawkins Jiawei /* 1071fee364e4SHawkins Jiawei * If the CVQ command is invalid, we should simulate the vdpa device 1072fee364e4SHawkins Jiawei * to reject the VIRTIO_NET_CTRL_MAC_TABLE_SET CVQ command 1073fee364e4SHawkins Jiawei */ 1074fee364e4SHawkins Jiawei *s->status = VIRTIO_NET_ERR; 1075fee364e4SHawkins Jiawei return sizeof(*s->status); 1076fee364e4SHawkins Jiawei } 1077fee364e4SHawkins Jiawei cursor += sizeof(mac_data) + le32_to_cpu(mac_data.entries) * ETH_ALEN; 1078fee364e4SHawkins Jiawei 1079fee364e4SHawkins Jiawei /* validate the CVQ command */ 1080fee364e4SHawkins Jiawei if (iov_size(elem->out_sg, elem->out_num) != cursor) { 1081fee364e4SHawkins Jiawei /* 1082fee364e4SHawkins Jiawei * If the CVQ command is invalid, we should simulate the vdpa device 1083fee364e4SHawkins Jiawei * to reject the VIRTIO_NET_CTRL_MAC_TABLE_SET CVQ command 1084fee364e4SHawkins Jiawei */ 1085fee364e4SHawkins Jiawei *s->status = VIRTIO_NET_ERR; 1086fee364e4SHawkins Jiawei return sizeof(*s->status); 1087fee364e4SHawkins Jiawei } 1088fee364e4SHawkins Jiawei 1089fee364e4SHawkins Jiawei /* 1090fee364e4SHawkins Jiawei * According to VirtIO standard, "Since there are no guarantees, 1091fee364e4SHawkins Jiawei * it can use a hash filter or silently switch to allmulti or 1092fee364e4SHawkins Jiawei * promiscuous mode if it is given too many addresses.". 1093fee364e4SHawkins Jiawei * 1094fee364e4SHawkins Jiawei * Therefore, considering that QEMU is unable to send the entire 1095fee364e4SHawkins Jiawei * filter table to the vdpa device, it should send the 1096fee364e4SHawkins Jiawei * VIRTIO_NET_CTRL_RX_PROMISC CVQ command to enable promiscuous mode 1097fee364e4SHawkins Jiawei */ 1098fee364e4SHawkins Jiawei r = vhost_vdpa_net_load_rx_mode(s, VIRTIO_NET_CTRL_RX_PROMISC, 1); 1099fee364e4SHawkins Jiawei if (unlikely(r < 0)) { 1100fee364e4SHawkins Jiawei return r; 1101fee364e4SHawkins Jiawei } 1102fee364e4SHawkins Jiawei if (*s->status != VIRTIO_NET_OK) { 1103fee364e4SHawkins Jiawei return sizeof(*s->status); 1104fee364e4SHawkins Jiawei } 1105fee364e4SHawkins Jiawei 1106fee364e4SHawkins Jiawei /* 1107fee364e4SHawkins Jiawei * QEMU should also send a fake VIRTIO_NET_CTRL_MAC_TABLE_SET CVQ 1108fee364e4SHawkins Jiawei * command to the device model, including (`MAC_TABLE_ENTRIES` + 1) 1109fee364e4SHawkins Jiawei * non-multicast MAC addresses and (`MAC_TABLE_ENTRIES` + 1) 1110fee364e4SHawkins Jiawei * multicast MAC addresses. 1111fee364e4SHawkins Jiawei * 1112fee364e4SHawkins Jiawei * By doing so, the device model can mark `n->mac_table.uni_overflow` 1113fee364e4SHawkins Jiawei * and `n->mac_table.multi_overflow`, enabling all packets to be 1114fee364e4SHawkins Jiawei * received, which aligns with the state of the vdpa device. 1115fee364e4SHawkins Jiawei */ 1116fee364e4SHawkins Jiawei cursor = 0; 1117fee364e4SHawkins Jiawei uint32_t fake_uni_entries = MAC_TABLE_ENTRIES + 1, 1118fee364e4SHawkins Jiawei fake_mul_entries = MAC_TABLE_ENTRIES + 1, 1119fee364e4SHawkins Jiawei fake_cvq_size = sizeof(struct virtio_net_ctrl_hdr) + 1120fee364e4SHawkins Jiawei sizeof(mac_data) + fake_uni_entries * ETH_ALEN + 1121fee364e4SHawkins Jiawei sizeof(mac_data) + fake_mul_entries * ETH_ALEN; 1122fee364e4SHawkins Jiawei 1123fee364e4SHawkins Jiawei assert(fake_cvq_size < vhost_vdpa_net_cvq_cmd_page_len()); 1124fee364e4SHawkins Jiawei out->iov_len = fake_cvq_size; 1125fee364e4SHawkins Jiawei 1126fee364e4SHawkins Jiawei /* pack the header for fake CVQ command */ 1127fee364e4SHawkins Jiawei hdr_ptr = out->iov_base + cursor; 1128fee364e4SHawkins Jiawei hdr_ptr->class = VIRTIO_NET_CTRL_MAC; 1129fee364e4SHawkins Jiawei hdr_ptr->cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET; 1130fee364e4SHawkins Jiawei cursor += sizeof(*hdr_ptr); 1131fee364e4SHawkins Jiawei 1132fee364e4SHawkins Jiawei /* 1133fee364e4SHawkins Jiawei * Pack the non-multicast MAC addresses part for fake CVQ command. 1134fee364e4SHawkins Jiawei * 1135fee364e4SHawkins Jiawei * According to virtio_net_handle_mac(), QEMU doesn't verify the MAC 11360a19d879SMichael Tokarev * addresses provided in CVQ command. Therefore, only the entries 1137fee364e4SHawkins Jiawei * field need to be prepared in the CVQ command. 1138fee364e4SHawkins Jiawei */ 1139fee364e4SHawkins Jiawei mac_ptr = out->iov_base + cursor; 1140fee364e4SHawkins Jiawei mac_ptr->entries = cpu_to_le32(fake_uni_entries); 1141fee364e4SHawkins Jiawei cursor += sizeof(*mac_ptr) + fake_uni_entries * ETH_ALEN; 1142fee364e4SHawkins Jiawei 1143fee364e4SHawkins Jiawei /* 1144fee364e4SHawkins Jiawei * Pack the multicast MAC addresses part for fake CVQ command. 1145fee364e4SHawkins Jiawei * 1146fee364e4SHawkins Jiawei * According to virtio_net_handle_mac(), QEMU doesn't verify the MAC 11470a19d879SMichael Tokarev * addresses provided in CVQ command. Therefore, only the entries 1148fee364e4SHawkins Jiawei * field need to be prepared in the CVQ command. 1149fee364e4SHawkins Jiawei */ 1150fee364e4SHawkins Jiawei mac_ptr = out->iov_base + cursor; 1151fee364e4SHawkins Jiawei mac_ptr->entries = cpu_to_le32(fake_mul_entries); 1152fee364e4SHawkins Jiawei 1153fee364e4SHawkins Jiawei /* 1154fee364e4SHawkins Jiawei * Simulating QEMU poll a vdpa device used buffer 1155fee364e4SHawkins Jiawei * for VIRTIO_NET_CTRL_MAC_TABLE_SET CVQ command 1156fee364e4SHawkins Jiawei */ 1157fee364e4SHawkins Jiawei return sizeof(*s->status); 1158fee364e4SHawkins Jiawei } 1159fee364e4SHawkins Jiawei 11602df4dd31SEugenio Pérez /** 11612df4dd31SEugenio Pérez * Validate and copy control virtqueue commands. 11622df4dd31SEugenio Pérez * 11632df4dd31SEugenio Pérez * Following QEMU guidelines, we offer a copy of the buffers to the device to 11642df4dd31SEugenio Pérez * prevent TOCTOU bugs. 1165bd907ae4SEugenio Pérez */ 1166bd907ae4SEugenio Pérez static int vhost_vdpa_net_handle_ctrl_avail(VhostShadowVirtqueue *svq, 1167bd907ae4SEugenio Pérez VirtQueueElement *elem, 1168bd907ae4SEugenio Pérez void *opaque) 1169bd907ae4SEugenio Pérez { 11702df4dd31SEugenio Pérez VhostVDPAState *s = opaque; 1171be4278b6SEugenio Pérez size_t in_len; 117245c41018SHawkins Jiawei const struct virtio_net_ctrl_hdr *ctrl; 1173bd907ae4SEugenio Pérez virtio_net_ctrl_ack status = VIRTIO_NET_ERR; 11747a7f87e9SEugenio Pérez /* Out buffer sent to both the vdpa device and the device model */ 11757a7f87e9SEugenio Pérez struct iovec out = { 11767a7f87e9SEugenio Pérez .iov_base = s->cvq_cmd_out_buffer, 11777a7f87e9SEugenio Pérez }; 11782df4dd31SEugenio Pérez /* in buffer used for device model */ 11792df4dd31SEugenio Pérez const struct iovec in = { 11802df4dd31SEugenio Pérez .iov_base = &status, 11812df4dd31SEugenio Pérez .iov_len = sizeof(status), 11822df4dd31SEugenio Pérez }; 1183be4278b6SEugenio Pérez ssize_t dev_written = -EINVAL; 1184bd907ae4SEugenio Pérez 11857a7f87e9SEugenio Pérez out.iov_len = iov_to_buf(elem->out_sg, elem->out_num, 0, 11867a7f87e9SEugenio Pérez s->cvq_cmd_out_buffer, 1187fee364e4SHawkins Jiawei vhost_vdpa_net_cvq_cmd_page_len()); 118845c41018SHawkins Jiawei 118945c41018SHawkins Jiawei ctrl = s->cvq_cmd_out_buffer; 119045c41018SHawkins Jiawei if (ctrl->class == VIRTIO_NET_CTRL_ANNOUNCE) { 11913f9a3eebSEugenio Pérez /* 11923f9a3eebSEugenio Pérez * Guest announce capability is emulated by qemu, so don't forward to 11933f9a3eebSEugenio Pérez * the device. 11943f9a3eebSEugenio Pérez */ 11953f9a3eebSEugenio Pérez dev_written = sizeof(status); 11963f9a3eebSEugenio Pérez *s->status = VIRTIO_NET_OK; 1197fee364e4SHawkins Jiawei } else if (unlikely(ctrl->class == VIRTIO_NET_CTRL_MAC && 1198fee364e4SHawkins Jiawei ctrl->cmd == VIRTIO_NET_CTRL_MAC_TABLE_SET && 1199fee364e4SHawkins Jiawei iov_size(elem->out_sg, elem->out_num) > out.iov_len)) { 1200fee364e4SHawkins Jiawei /* 1201fee364e4SHawkins Jiawei * Due to the size limitation of the out buffer sent to the vdpa device, 1202fee364e4SHawkins Jiawei * which is determined by vhost_vdpa_net_cvq_cmd_page_len(), excessive 1203fee364e4SHawkins Jiawei * MAC addresses set by the driver for the filter table can cause 1204fee364e4SHawkins Jiawei * truncation of the CVQ command in QEMU. As a result, the vdpa device 1205fee364e4SHawkins Jiawei * rejects the flawed CVQ command. 1206fee364e4SHawkins Jiawei * 1207fee364e4SHawkins Jiawei * Therefore, QEMU must handle this situation instead of sending 12080a19d879SMichael Tokarev * the CVQ command directly. 1209fee364e4SHawkins Jiawei */ 1210fee364e4SHawkins Jiawei dev_written = vhost_vdpa_net_excessive_mac_filter_cvq_add(s, elem, 1211fee364e4SHawkins Jiawei &out); 1212fee364e4SHawkins Jiawei if (unlikely(dev_written < 0)) { 1213fee364e4SHawkins Jiawei goto out; 1214fee364e4SHawkins Jiawei } 12153f9a3eebSEugenio Pérez } else { 1216be4278b6SEugenio Pérez dev_written = vhost_vdpa_net_cvq_add(s, out.iov_len, sizeof(status)); 1217be4278b6SEugenio Pérez if (unlikely(dev_written < 0)) { 1218bd907ae4SEugenio Pérez goto out; 1219bd907ae4SEugenio Pérez } 12203f9a3eebSEugenio Pérez } 1221bd907ae4SEugenio Pérez 1222bd907ae4SEugenio Pérez if (unlikely(dev_written < sizeof(status))) { 1223bd907ae4SEugenio Pérez error_report("Insufficient written data (%zu)", dev_written); 12242df4dd31SEugenio Pérez goto out; 12252df4dd31SEugenio Pérez } 12262df4dd31SEugenio Pérez 122717fb889fSEugenio Pérez if (*s->status != VIRTIO_NET_OK) { 1228d45243bcSEugenio Pérez goto out; 12292df4dd31SEugenio Pérez } 12302df4dd31SEugenio Pérez 12312df4dd31SEugenio Pérez status = VIRTIO_NET_ERR; 12327a7f87e9SEugenio Pérez virtio_net_handle_ctrl_iov(svq->vdev, &in, 1, &out, 1); 12332df4dd31SEugenio Pérez if (status != VIRTIO_NET_OK) { 12342df4dd31SEugenio Pérez error_report("Bad CVQ processing in model"); 1235bd907ae4SEugenio Pérez } 1236bd907ae4SEugenio Pérez 1237bd907ae4SEugenio Pérez out: 1238bd907ae4SEugenio Pérez in_len = iov_from_buf(elem->in_sg, elem->in_num, 0, &status, 1239bd907ae4SEugenio Pérez sizeof(status)); 1240bd907ae4SEugenio Pérez if (unlikely(in_len < sizeof(status))) { 1241bd907ae4SEugenio Pérez error_report("Bad device CVQ written length"); 1242bd907ae4SEugenio Pérez } 1243bd907ae4SEugenio Pérez vhost_svq_push_elem(svq, elem, MIN(in_len, sizeof(status))); 1244031b1abaSHawkins Jiawei /* 1245031b1abaSHawkins Jiawei * `elem` belongs to vhost_vdpa_net_handle_ctrl_avail() only when 1246031b1abaSHawkins Jiawei * the function successfully forwards the CVQ command, indicated 1247031b1abaSHawkins Jiawei * by a non-negative value of `dev_written`. Otherwise, it still 1248031b1abaSHawkins Jiawei * belongs to SVQ. 1249031b1abaSHawkins Jiawei * This function should only free the `elem` when it owns. 1250031b1abaSHawkins Jiawei */ 1251031b1abaSHawkins Jiawei if (dev_written >= 0) { 1252bd907ae4SEugenio Pérez g_free(elem); 1253031b1abaSHawkins Jiawei } 1254be4278b6SEugenio Pérez return dev_written < 0 ? dev_written : 0; 1255bd907ae4SEugenio Pérez } 1256bd907ae4SEugenio Pérez 1257bd907ae4SEugenio Pérez static const VhostShadowVirtqueueOps vhost_vdpa_net_svq_ops = { 1258bd907ae4SEugenio Pérez .avail_handler = vhost_vdpa_net_handle_ctrl_avail, 1259bd907ae4SEugenio Pérez }; 1260bd907ae4SEugenio Pérez 1261152128d6SEugenio Pérez /** 1262152128d6SEugenio Pérez * Probe if CVQ is isolated 1263152128d6SEugenio Pérez * 1264152128d6SEugenio Pérez * @device_fd The vdpa device fd 1265152128d6SEugenio Pérez * @features Features offered by the device. 1266152128d6SEugenio Pérez * @cvq_index The control vq pair index 1267152128d6SEugenio Pérez * 1268152128d6SEugenio Pérez * Returns <0 in case of failure, 0 if false and 1 if true. 1269152128d6SEugenio Pérez */ 1270152128d6SEugenio Pérez static int vhost_vdpa_probe_cvq_isolation(int device_fd, uint64_t features, 1271152128d6SEugenio Pérez int cvq_index, Error **errp) 1272152128d6SEugenio Pérez { 1273152128d6SEugenio Pérez uint64_t backend_features; 1274152128d6SEugenio Pérez int64_t cvq_group; 1275152128d6SEugenio Pérez uint8_t status = VIRTIO_CONFIG_S_ACKNOWLEDGE | 1276152128d6SEugenio Pérez VIRTIO_CONFIG_S_DRIVER | 1277152128d6SEugenio Pérez VIRTIO_CONFIG_S_FEATURES_OK; 1278152128d6SEugenio Pérez int r; 1279152128d6SEugenio Pérez 1280152128d6SEugenio Pérez ERRP_GUARD(); 1281152128d6SEugenio Pérez 1282152128d6SEugenio Pérez r = ioctl(device_fd, VHOST_GET_BACKEND_FEATURES, &backend_features); 1283152128d6SEugenio Pérez if (unlikely(r < 0)) { 1284152128d6SEugenio Pérez error_setg_errno(errp, errno, "Cannot get vdpa backend_features"); 1285152128d6SEugenio Pérez return r; 1286152128d6SEugenio Pérez } 1287152128d6SEugenio Pérez 1288152128d6SEugenio Pérez if (!(backend_features & BIT_ULL(VHOST_BACKEND_F_IOTLB_ASID))) { 1289152128d6SEugenio Pérez return 0; 1290152128d6SEugenio Pérez } 1291152128d6SEugenio Pérez 1292152128d6SEugenio Pérez r = ioctl(device_fd, VHOST_SET_FEATURES, &features); 1293152128d6SEugenio Pérez if (unlikely(r)) { 1294152128d6SEugenio Pérez error_setg_errno(errp, errno, "Cannot set features"); 1295152128d6SEugenio Pérez } 1296152128d6SEugenio Pérez 1297152128d6SEugenio Pérez r = ioctl(device_fd, VHOST_VDPA_SET_STATUS, &status); 1298152128d6SEugenio Pérez if (unlikely(r)) { 1299152128d6SEugenio Pérez error_setg_errno(errp, -r, "Cannot set device features"); 1300152128d6SEugenio Pérez goto out; 1301152128d6SEugenio Pérez } 1302152128d6SEugenio Pérez 1303152128d6SEugenio Pérez cvq_group = vhost_vdpa_get_vring_group(device_fd, cvq_index, errp); 1304152128d6SEugenio Pérez if (unlikely(cvq_group < 0)) { 1305152128d6SEugenio Pérez if (cvq_group != -ENOTSUP) { 1306152128d6SEugenio Pérez r = cvq_group; 1307152128d6SEugenio Pérez goto out; 1308152128d6SEugenio Pérez } 1309152128d6SEugenio Pérez 1310152128d6SEugenio Pérez /* 1311152128d6SEugenio Pérez * The kernel report VHOST_BACKEND_F_IOTLB_ASID if the vdpa frontend 1312152128d6SEugenio Pérez * support ASID even if the parent driver does not. The CVQ cannot be 1313152128d6SEugenio Pérez * isolated in this case. 1314152128d6SEugenio Pérez */ 1315152128d6SEugenio Pérez error_free(*errp); 1316152128d6SEugenio Pérez *errp = NULL; 1317152128d6SEugenio Pérez r = 0; 1318152128d6SEugenio Pérez goto out; 1319152128d6SEugenio Pérez } 1320152128d6SEugenio Pérez 1321152128d6SEugenio Pérez for (int i = 0; i < cvq_index; ++i) { 1322152128d6SEugenio Pérez int64_t group = vhost_vdpa_get_vring_group(device_fd, i, errp); 1323152128d6SEugenio Pérez if (unlikely(group < 0)) { 1324152128d6SEugenio Pérez r = group; 1325152128d6SEugenio Pérez goto out; 1326152128d6SEugenio Pérez } 1327152128d6SEugenio Pérez 1328152128d6SEugenio Pérez if (group == (int64_t)cvq_group) { 1329152128d6SEugenio Pérez r = 0; 1330152128d6SEugenio Pérez goto out; 1331152128d6SEugenio Pérez } 1332152128d6SEugenio Pérez } 1333152128d6SEugenio Pérez 1334152128d6SEugenio Pérez r = 1; 1335152128d6SEugenio Pérez 1336152128d6SEugenio Pérez out: 1337152128d6SEugenio Pérez status = 0; 1338152128d6SEugenio Pérez ioctl(device_fd, VHOST_VDPA_SET_STATUS, &status); 1339152128d6SEugenio Pérez return r; 1340152128d6SEugenio Pérez } 1341152128d6SEugenio Pérez 1342654790b6SJason Wang static NetClientState *net_vhost_vdpa_init(NetClientState *peer, 1343654790b6SJason Wang const char *device, 1344654790b6SJason Wang const char *name, 134540237840SJason Wang int vdpa_device_fd, 134640237840SJason Wang int queue_pair_index, 134740237840SJason Wang int nvqs, 13481576dbb5SEugenio Pérez bool is_datapath, 13491576dbb5SEugenio Pérez bool svq, 13505c1ebd4cSEugenio Pérez struct vhost_vdpa_iova_range iova_range, 1351152128d6SEugenio Pérez uint64_t features, 1352152128d6SEugenio Pérez Error **errp) 13531e0a84eaSCindy Lu { 13541e0a84eaSCindy Lu NetClientState *nc = NULL; 13551e0a84eaSCindy Lu VhostVDPAState *s; 13561e0a84eaSCindy Lu int ret = 0; 13571e0a84eaSCindy Lu assert(name); 1358152128d6SEugenio Pérez int cvq_isolated; 1359152128d6SEugenio Pérez 136040237840SJason Wang if (is_datapath) { 136140237840SJason Wang nc = qemu_new_net_client(&net_vhost_vdpa_info, peer, device, 136240237840SJason Wang name); 136340237840SJason Wang } else { 1364152128d6SEugenio Pérez cvq_isolated = vhost_vdpa_probe_cvq_isolation(vdpa_device_fd, features, 1365152128d6SEugenio Pérez queue_pair_index * 2, 1366152128d6SEugenio Pérez errp); 1367152128d6SEugenio Pérez if (unlikely(cvq_isolated < 0)) { 1368152128d6SEugenio Pérez return NULL; 1369152128d6SEugenio Pérez } 1370152128d6SEugenio Pérez 1371f8972b56SEugenio Pérez nc = qemu_new_net_control_client(&net_vhost_vdpa_cvq_info, peer, 137240237840SJason Wang device, name); 137340237840SJason Wang } 137453b85d95SLaurent Vivier qemu_set_info_str(nc, TYPE_VHOST_VDPA); 13751e0a84eaSCindy Lu s = DO_UPCAST(VhostVDPAState, nc, nc); 13767327813dSJason Wang 13771e0a84eaSCindy Lu s->vhost_vdpa.device_fd = vdpa_device_fd; 137840237840SJason Wang s->vhost_vdpa.index = queue_pair_index; 13797f211a28SEugenio Pérez s->always_svq = svq; 138069498430SEugenio Pérez s->migration_state.notify = vdpa_net_migration_state_notifier; 13811576dbb5SEugenio Pérez s->vhost_vdpa.shadow_vqs_enabled = svq; 1382a585fad2SEugenio Pérez s->vhost_vdpa.iova_range = iova_range; 13836188d78aSEugenio Pérez s->vhost_vdpa.shadow_data = svq; 13845c1ebd4cSEugenio Pérez if (queue_pair_index == 0) { 13855c1ebd4cSEugenio Pérez vhost_vdpa_net_valid_svq_features(features, 13865c1ebd4cSEugenio Pérez &s->vhost_vdpa.migration_blocker); 13875c1ebd4cSEugenio Pérez } else if (!is_datapath) { 1388babf8b87SEugenio Pérez s->cvq_cmd_out_buffer = mmap(NULL, vhost_vdpa_net_cvq_cmd_page_len(), 1389babf8b87SEugenio Pérez PROT_READ | PROT_WRITE, 1390babf8b87SEugenio Pérez MAP_SHARED | MAP_ANONYMOUS, -1, 0); 1391babf8b87SEugenio Pérez s->status = mmap(NULL, vhost_vdpa_net_cvq_cmd_page_len(), 1392babf8b87SEugenio Pérez PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 1393babf8b87SEugenio Pérez -1, 0); 13942df4dd31SEugenio Pérez 1395bd907ae4SEugenio Pérez s->vhost_vdpa.shadow_vq_ops = &vhost_vdpa_net_svq_ops; 1396bd907ae4SEugenio Pérez s->vhost_vdpa.shadow_vq_ops_opaque = s; 1397152128d6SEugenio Pérez s->cvq_isolated = cvq_isolated; 13989c363cf6SEugenio Pérez 13999c363cf6SEugenio Pérez /* 14008bc0049eSEugenio Pérez * TODO: We cannot migrate devices with CVQ and no x-svq enabled as 14018bc0049eSEugenio Pérez * there is no way to set the device state (MAC, MQ, etc) before 14028bc0049eSEugenio Pérez * starting the datapath. 14039c363cf6SEugenio Pérez * 14049c363cf6SEugenio Pérez * Migration blocker ownership now belongs to s->vhost_vdpa. 14059c363cf6SEugenio Pérez */ 14068bc0049eSEugenio Pérez if (!svq) { 14079c363cf6SEugenio Pérez error_setg(&s->vhost_vdpa.migration_blocker, 14089c363cf6SEugenio Pérez "net vdpa cannot migrate with CVQ feature"); 1409bd907ae4SEugenio Pérez } 14108bc0049eSEugenio Pérez } 141140237840SJason Wang ret = vhost_vdpa_add(nc, (void *)&s->vhost_vdpa, queue_pair_index, nvqs); 141274af5eecSJason Wang if (ret) { 141374af5eecSJason Wang qemu_del_net_client(nc); 1414654790b6SJason Wang return NULL; 141574af5eecSJason Wang } 1416654790b6SJason Wang return nc; 14171e0a84eaSCindy Lu } 14181e0a84eaSCindy Lu 14198170ab3fSEugenio Pérez static int vhost_vdpa_get_features(int fd, uint64_t *features, Error **errp) 14208170ab3fSEugenio Pérez { 14218170ab3fSEugenio Pérez int ret = ioctl(fd, VHOST_GET_FEATURES, features); 14228170ab3fSEugenio Pérez if (unlikely(ret < 0)) { 14238170ab3fSEugenio Pérez error_setg_errno(errp, errno, 14248170ab3fSEugenio Pérez "Fail to query features from vhost-vDPA device"); 14258170ab3fSEugenio Pérez } 14268170ab3fSEugenio Pérez return ret; 14278170ab3fSEugenio Pérez } 14288170ab3fSEugenio Pérez 14298170ab3fSEugenio Pérez static int vhost_vdpa_get_max_queue_pairs(int fd, uint64_t features, 14308170ab3fSEugenio Pérez int *has_cvq, Error **errp) 143140237840SJason Wang { 143240237840SJason Wang unsigned long config_size = offsetof(struct vhost_vdpa_config, buf); 1433cd523a41SStefano Garzarella g_autofree struct vhost_vdpa_config *config = NULL; 143440237840SJason Wang __virtio16 *max_queue_pairs; 143540237840SJason Wang int ret; 143640237840SJason Wang 143740237840SJason Wang if (features & (1 << VIRTIO_NET_F_CTRL_VQ)) { 143840237840SJason Wang *has_cvq = 1; 143940237840SJason Wang } else { 144040237840SJason Wang *has_cvq = 0; 144140237840SJason Wang } 144240237840SJason Wang 144340237840SJason Wang if (features & (1 << VIRTIO_NET_F_MQ)) { 144440237840SJason Wang config = g_malloc0(config_size + sizeof(*max_queue_pairs)); 144540237840SJason Wang config->off = offsetof(struct virtio_net_config, max_virtqueue_pairs); 144640237840SJason Wang config->len = sizeof(*max_queue_pairs); 144740237840SJason Wang 144840237840SJason Wang ret = ioctl(fd, VHOST_VDPA_GET_CONFIG, config); 144940237840SJason Wang if (ret) { 145040237840SJason Wang error_setg(errp, "Fail to get config from vhost-vDPA device"); 145140237840SJason Wang return -ret; 145240237840SJason Wang } 145340237840SJason Wang 145440237840SJason Wang max_queue_pairs = (__virtio16 *)&config->buf; 145540237840SJason Wang 145640237840SJason Wang return lduw_le_p(max_queue_pairs); 145740237840SJason Wang } 145840237840SJason Wang 145940237840SJason Wang return 1; 146040237840SJason Wang } 146140237840SJason Wang 14621e0a84eaSCindy Lu int net_init_vhost_vdpa(const Netdev *netdev, const char *name, 14631e0a84eaSCindy Lu NetClientState *peer, Error **errp) 14641e0a84eaSCindy Lu { 14651e0a84eaSCindy Lu const NetdevVhostVDPAOptions *opts; 14668170ab3fSEugenio Pérez uint64_t features; 1467654790b6SJason Wang int vdpa_device_fd; 1468eb3cb751SEugenio Pérez g_autofree NetClientState **ncs = NULL; 1469a585fad2SEugenio Pérez struct vhost_vdpa_iova_range iova_range; 1470eb3cb751SEugenio Pérez NetClientState *nc; 1471aed5da45SEugenio Pérez int queue_pairs, r, i = 0, has_cvq = 0; 14721e0a84eaSCindy Lu 14731e0a84eaSCindy Lu assert(netdev->type == NET_CLIENT_DRIVER_VHOST_VDPA); 14741e0a84eaSCindy Lu opts = &netdev->u.vhost_vdpa; 14757480874aSMarkus Armbruster if (!opts->vhostdev && !opts->vhostfd) { 14768801ccd0SSi-Wei Liu error_setg(errp, 14778801ccd0SSi-Wei Liu "vhost-vdpa: neither vhostdev= nor vhostfd= was specified"); 1478c8295404SEugenio Pérez return -1; 1479c8295404SEugenio Pérez } 14807327813dSJason Wang 14817480874aSMarkus Armbruster if (opts->vhostdev && opts->vhostfd) { 14828801ccd0SSi-Wei Liu error_setg(errp, 14838801ccd0SSi-Wei Liu "vhost-vdpa: vhostdev= and vhostfd= are mutually exclusive"); 14848801ccd0SSi-Wei Liu return -1; 14858801ccd0SSi-Wei Liu } 14868801ccd0SSi-Wei Liu 14877480874aSMarkus Armbruster if (opts->vhostdev) { 14880351152bSEugenio Pérez vdpa_device_fd = qemu_open(opts->vhostdev, O_RDWR, errp); 14897327813dSJason Wang if (vdpa_device_fd == -1) { 14907327813dSJason Wang return -errno; 14917327813dSJason Wang } 14925107fd3eSPeter Maydell } else { 14935107fd3eSPeter Maydell /* has_vhostfd */ 14948801ccd0SSi-Wei Liu vdpa_device_fd = monitor_fd_param(monitor_cur(), opts->vhostfd, errp); 14958801ccd0SSi-Wei Liu if (vdpa_device_fd == -1) { 14968801ccd0SSi-Wei Liu error_prepend(errp, "vhost-vdpa: unable to parse vhostfd: "); 14978801ccd0SSi-Wei Liu return -1; 14988801ccd0SSi-Wei Liu } 14998801ccd0SSi-Wei Liu } 15007327813dSJason Wang 15018170ab3fSEugenio Pérez r = vhost_vdpa_get_features(vdpa_device_fd, &features, errp); 15028170ab3fSEugenio Pérez if (unlikely(r < 0)) { 1503aed5da45SEugenio Pérez goto err; 15048170ab3fSEugenio Pérez } 15058170ab3fSEugenio Pérez 15068170ab3fSEugenio Pérez queue_pairs = vhost_vdpa_get_max_queue_pairs(vdpa_device_fd, features, 150740237840SJason Wang &has_cvq, errp); 150840237840SJason Wang if (queue_pairs < 0) { 15097327813dSJason Wang qemu_close(vdpa_device_fd); 151040237840SJason Wang return queue_pairs; 15117327813dSJason Wang } 15127327813dSJason Wang 1513bf7a2ad8SLongpeng r = vhost_vdpa_get_iova_range(vdpa_device_fd, &iova_range); 1514bf7a2ad8SLongpeng if (unlikely(r < 0)) { 1515bf7a2ad8SLongpeng error_setg(errp, "vhost-vdpa: get iova range failed: %s", 1516bf7a2ad8SLongpeng strerror(-r)); 1517bf7a2ad8SLongpeng goto err; 1518bf7a2ad8SLongpeng } 1519bf7a2ad8SLongpeng 152000ef422eSEugenio Pérez if (opts->x_svq && !vhost_vdpa_net_valid_svq_features(features, errp)) { 152100ef422eSEugenio Pérez goto err; 15221576dbb5SEugenio Pérez } 15231576dbb5SEugenio Pérez 152440237840SJason Wang ncs = g_malloc0(sizeof(*ncs) * queue_pairs); 152540237840SJason Wang 152640237840SJason Wang for (i = 0; i < queue_pairs; i++) { 152740237840SJason Wang ncs[i] = net_vhost_vdpa_init(peer, TYPE_VHOST_VDPA, name, 15281576dbb5SEugenio Pérez vdpa_device_fd, i, 2, true, opts->x_svq, 1529152128d6SEugenio Pérez iova_range, features, errp); 153040237840SJason Wang if (!ncs[i]) 153140237840SJason Wang goto err; 153240237840SJason Wang } 153340237840SJason Wang 153440237840SJason Wang if (has_cvq) { 153540237840SJason Wang nc = net_vhost_vdpa_init(peer, TYPE_VHOST_VDPA, name, 15361576dbb5SEugenio Pérez vdpa_device_fd, i, 1, false, 1537152128d6SEugenio Pérez opts->x_svq, iova_range, features, errp); 153840237840SJason Wang if (!nc) 153940237840SJason Wang goto err; 154040237840SJason Wang } 154140237840SJason Wang 1542654790b6SJason Wang return 0; 154340237840SJason Wang 154440237840SJason Wang err: 154540237840SJason Wang if (i) { 15469bd05507SSi-Wei Liu for (i--; i >= 0; i--) { 15479bd05507SSi-Wei Liu qemu_del_net_client(ncs[i]); 15489bd05507SSi-Wei Liu } 154940237840SJason Wang } 15501576dbb5SEugenio Pérez 155140237840SJason Wang qemu_close(vdpa_device_fd); 155240237840SJason Wang 155340237840SJason Wang return -1; 15541e0a84eaSCindy Lu } 1555