- struct ibv_device **ibv_list;
- /*
- * Number of found IB Devices matching with requested PCI BDF.
- * nd != 1 means there are multiple IB devices over the same
- * PCI device and we have representors and master.
- */
- unsigned int nd = 0;
- /*
- * Number of found IB device Ports. nd = 1 and np = 1..n means
- * we have the single multiport IB device, and there may be
- * representors attached to some of found ports.
- */
- unsigned int np = 0;
- /*
- * Number of DPDK ethernet devices to Spawn - either over
- * multiple IB devices or multiple ports of single IB device.
- * Actually this is the number of iterations to spawn.
- */
- unsigned int ns = 0;
- struct mlx5_dev_config dev_config;
- int ret;
-
- ret = mlx5_init_once();
- if (ret) {
- DRV_LOG(ERR, "unable to init PMD global data: %s",
- strerror(rte_errno));
- return -rte_errno;
- }
- assert(pci_drv == &mlx5_driver);
- errno = 0;
- ibv_list = mlx5_glue->get_device_list(&ret);
- if (!ibv_list) {
- rte_errno = errno ? errno : ENOSYS;
- DRV_LOG(ERR, "cannot list devices, is ib_uverbs loaded?");
- return -rte_errno;
- }
- /*
- * First scan the list of all Infiniband devices to find
- * matching ones, gathering into the list.
- */
- struct ibv_device *ibv_match[ret + 1];
- int nl_route = -1;
- int nl_rdma = -1;
- unsigned int i;
-
- while (ret-- > 0) {
- struct rte_pci_addr pci_addr;
-
- DRV_LOG(DEBUG, "checking device \"%s\"", ibv_list[ret]->name);
- if (mlx5_ibv_device_to_pci_addr(ibv_list[ret], &pci_addr))
- continue;
- if (pci_dev->addr.domain != pci_addr.domain ||
- pci_dev->addr.bus != pci_addr.bus ||
- pci_dev->addr.devid != pci_addr.devid ||
- pci_dev->addr.function != pci_addr.function)
- continue;
- DRV_LOG(INFO, "PCI information matches for device \"%s\"",
- ibv_list[ret]->name);
- ibv_match[nd++] = ibv_list[ret];
- }
- ibv_match[nd] = NULL;
- if (!nd) {
- /* No device matches, just complain and bail out. */
- mlx5_glue->free_device_list(ibv_list);
- DRV_LOG(WARNING,
- "no Verbs device matches PCI device " PCI_PRI_FMT ","
- " are kernel drivers loaded?",
- pci_dev->addr.domain, pci_dev->addr.bus,
- pci_dev->addr.devid, pci_dev->addr.function);
- rte_errno = ENOENT;
- ret = -rte_errno;
- return ret;
- }
- nl_route = mlx5_nl_init(NETLINK_ROUTE);
- nl_rdma = mlx5_nl_init(NETLINK_RDMA);
- if (nd == 1) {
- /*
- * Found single matching device may have multiple ports.
- * Each port may be representor, we have to check the port
- * number and check the representors existence.
- */
- if (nl_rdma >= 0)
- np = mlx5_nl_portnum(nl_rdma, ibv_match[0]->name);
- if (!np)
- DRV_LOG(WARNING, "can not get IB device \"%s\""
- " ports number", ibv_match[0]->name);
- }
- /*
- * Now we can determine the maximal
- * amount of devices to be spawned.
- */
- struct mlx5_dev_spawn_data list[np ? np : nd];
-
- if (np > 1) {
- /*
- * Single IB device with multiple ports found,
- * it may be E-Switch master device and representors.
- * We have to perform identification trough the ports.
- */
- assert(nl_rdma >= 0);
- assert(ns == 0);
- assert(nd == 1);
- for (i = 1; i <= np; ++i) {
- list[ns].max_port = np;
- list[ns].ibv_port = i;
- list[ns].ibv_dev = ibv_match[0];
- list[ns].eth_dev = NULL;
- list[ns].pci_dev = pci_dev;
- list[ns].ifindex = mlx5_nl_ifindex
- (nl_rdma, list[ns].ibv_dev->name, i);
- if (!list[ns].ifindex) {
- /*
- * No network interface index found for the
- * specified port, it means there is no
- * representor on this port. It's OK,
- * there can be disabled ports, for example
- * if sriov_numvfs < sriov_totalvfs.
- */
- continue;
- }
- ret = -1;
- if (nl_route >= 0)
- ret = mlx5_nl_switch_info
- (nl_route,
- list[ns].ifindex,
- &list[ns].info);
- if (ret || (!list[ns].info.representor &&
- !list[ns].info.master)) {
- /*
- * We failed to recognize representors with
- * Netlink, let's try to perform the task
- * with sysfs.
- */
- ret = mlx5_sysfs_switch_info
- (list[ns].ifindex,
- &list[ns].info);
- }
- if (!ret && (list[ns].info.representor ^
- list[ns].info.master))
- ns++;
- }
- if (!ns) {
- DRV_LOG(ERR,
- "unable to recognize master/representors"
- " on the IB device with multiple ports");
- rte_errno = ENOENT;
- ret = -rte_errno;
- goto exit;
- }
- } else {
- /*
- * The existence of several matching entries (nd > 1) means
- * port representors have been instantiated. No existing Verbs
- * call nor sysfs entries can tell them apart, this can only
- * be done through Netlink calls assuming kernel drivers are
- * recent enough to support them.
- *
- * In the event of identification failure through Netlink,
- * try again through sysfs, then:
- *
- * 1. A single IB device matches (nd == 1) with single
- * port (np=0/1) and is not a representor, assume
- * no switch support.
- *
- * 2. Otherwise no safe assumptions can be made;
- * complain louder and bail out.
- */
- np = 1;
- for (i = 0; i != nd; ++i) {
- memset(&list[ns].info, 0, sizeof(list[ns].info));
- list[ns].max_port = 1;
- list[ns].ibv_port = 1;
- list[ns].ibv_dev = ibv_match[i];
- list[ns].eth_dev = NULL;
- list[ns].pci_dev = pci_dev;
- list[ns].ifindex = 0;
- if (nl_rdma >= 0)
- list[ns].ifindex = mlx5_nl_ifindex
- (nl_rdma, list[ns].ibv_dev->name, 1);
- if (!list[ns].ifindex) {
- char ifname[IF_NAMESIZE];
-
- /*
- * Netlink failed, it may happen with old
- * ib_core kernel driver (before 4.16).
- * We can assume there is old driver because
- * here we are processing single ports IB
- * devices. Let's try sysfs to retrieve
- * the ifindex. The method works for
- * master device only.
- */
- if (nd > 1) {
- /*
- * Multiple devices found, assume
- * representors, can not distinguish
- * master/representor and retrieve
- * ifindex via sysfs.
- */
- continue;
- }
- ret = mlx5_get_master_ifname
- (ibv_match[i]->ibdev_path, &ifname);
- if (!ret)
- list[ns].ifindex =
- if_nametoindex(ifname);
- if (!list[ns].ifindex) {
- /*
- * No network interface index found
- * for the specified device, it means
- * there it is neither representor
- * nor master.
- */
- continue;
- }
- }
- ret = -1;
- if (nl_route >= 0)
- ret = mlx5_nl_switch_info
- (nl_route,
- list[ns].ifindex,
- &list[ns].info);
- if (ret || (!list[ns].info.representor &&
- !list[ns].info.master)) {
- /*
- * We failed to recognize representors with
- * Netlink, let's try to perform the task
- * with sysfs.
- */
- ret = mlx5_sysfs_switch_info
- (list[ns].ifindex,
- &list[ns].info);
- }
- if (!ret && (list[ns].info.representor ^
- list[ns].info.master)) {
- ns++;
- } else if ((nd == 1) &&
- !list[ns].info.representor &&
- !list[ns].info.master) {
- /*
- * Single IB device with
- * one physical port and
- * attached network device.
- * May be SRIOV is not enabled
- * or there is no representors.
- */
- DRV_LOG(INFO, "no E-Switch support detected");
- ns++;
- break;
- }
- }
- if (!ns) {
- DRV_LOG(ERR,
- "unable to recognize master/representors"
- " on the multiple IB devices");
- rte_errno = ENOENT;
- ret = -rte_errno;
- goto exit;
- }
- }
- assert(ns);
- /*
- * Sort list to probe devices in natural order for users convenience
- * (i.e. master first, then representors from lowest to highest ID).
- */
- qsort(list, ns, sizeof(*list), mlx5_dev_spawn_data_cmp);
- /* Default configuration. */
- dev_config = (struct mlx5_dev_config){
- .hw_padding = 0,
- .mps = MLX5_ARG_UNSET,
- .rx_vec_en = 1,
- .txq_inline_max = MLX5_ARG_UNSET,
- .txq_inline_min = MLX5_ARG_UNSET,
- .txq_inline_mpw = MLX5_ARG_UNSET,
- .txqs_inline = MLX5_ARG_UNSET,
- .vf_nl_en = 1,
- .mr_ext_memseg_en = 1,
- .mprq = {
- .enabled = 0, /* Disabled by default. */
- .stride_num_n = MLX5_MPRQ_STRIDE_NUM_N,
- .max_memcpy_len = MLX5_MPRQ_MEMCPY_DEFAULT_LEN,
- .min_rxqs_num = MLX5_MPRQ_MIN_RXQS,
- },
- .dv_esw_en = 1,
- };
- /* Device specific configuration. */
- switch (pci_dev->id.device_id) {
- case PCI_DEVICE_ID_MELLANOX_CONNECTX4VF:
- case PCI_DEVICE_ID_MELLANOX_CONNECTX4LXVF:
- case PCI_DEVICE_ID_MELLANOX_CONNECTX5VF:
- case PCI_DEVICE_ID_MELLANOX_CONNECTX5EXVF:
- case PCI_DEVICE_ID_MELLANOX_CONNECTX5BFVF:
- case PCI_DEVICE_ID_MELLANOX_CONNECTX6VF:
- dev_config.vf = 1;
- break;
- default:
- break;
- }
- for (i = 0; i != ns; ++i) {
- uint32_t restore;
-
- list[i].eth_dev = mlx5_dev_spawn(&pci_dev->device,
- &list[i],
- dev_config);
- if (!list[i].eth_dev) {
- if (rte_errno != EBUSY && rte_errno != EEXIST)
- break;
- /* Device is disabled or already spawned. Ignore it. */
- continue;
- }
- restore = list[i].eth_dev->data->dev_flags;
- rte_eth_copy_pci_info(list[i].eth_dev, pci_dev);
- /* Restore non-PCI flags cleared by the above call. */
- list[i].eth_dev->data->dev_flags |= restore;
- rte_eth_dev_probing_finish(list[i].eth_dev);
- }
- if (i != ns) {
- DRV_LOG(ERR,
- "probe of PCI device " PCI_PRI_FMT " aborted after"
- " encountering an error: %s",
- pci_dev->addr.domain, pci_dev->addr.bus,
- pci_dev->addr.devid, pci_dev->addr.function,
- strerror(rte_errno));
- ret = -rte_errno;
- /* Roll back. */
- while (i--) {
- if (!list[i].eth_dev)
- continue;
- mlx5_dev_close(list[i].eth_dev);
- /* mac_addrs must not be freed because in dev_private */
- list[i].eth_dev->data->mac_addrs = NULL;
- claim_zero(rte_eth_dev_release_port(list[i].eth_dev));
- }
- /* Restore original error. */
- rte_errno = -ret;
- } else {
- ret = 0;