static int netvsc_set_channels(struct net_device *net, struct ethtool_channels *channels) { struct net_device_context *net_device_ctx = netdev_priv(net); struct hv_device *dev = net_device_ctx->device_ctx; struct netvsc_device *nvdev = net_device_ctx->nvdev; unsigned int orig, count = channels->combined_count; struct netvsc_device_info device_info; bool was_opened; int ret = 0; /* We do not support separate count for rx, tx, or other */ if (count == 0 || channels->rx_count || channels->tx_count || channels->other_count) return -EINVAL; if (count > net->num_tx_queues || count > VRSS_CHANNEL_MAX) return -EINVAL; if (!nvdev || nvdev->destroy) return -ENODEV; if (nvdev->nvsp_version < NVSP_PROTOCOL_VERSION_5) return -EINVAL; if (count > nvdev->max_chn) return -EINVAL; orig = nvdev->num_chn; was_opened = rndis_filter_opened(nvdev); if (was_opened) rndis_filter_close(nvdev); rndis_filter_device_remove(dev, nvdev); memset(&device_info, 0, sizeof(device_info)); device_info.num_chn = count; device_info.ring_size = ring_size; nvdev = rndis_filter_device_add(dev, &device_info); if (!IS_ERR(nvdev)) { netif_set_real_num_tx_queues(net, nvdev->num_chn); netif_set_real_num_rx_queues(net, nvdev->num_chn); ret = PTR_ERR(nvdev); } else { device_info.num_chn = orig; rndis_filter_device_add(dev, &device_info); } if (was_opened) rndis_filter_open(nvdev); /* We may have missed link change notifications */ net_device_ctx->last_reconfig = 0; schedule_delayed_work(&net_device_ctx->dwork, 0); return ret; }
static int netvsc_change_mtu(struct net_device *ndev, int mtu) { struct net_device_context *ndevctx = netdev_priv(ndev); struct netvsc_device *nvdev = ndevctx->nvdev; struct hv_device *hdev = ndevctx->device_ctx; int orig_mtu = ndev->mtu; struct netvsc_device_info device_info; int limit = ETH_DATA_LEN; bool was_opened; int ret = 0; if (!nvdev || nvdev->destroy) return -ENODEV; if (nvdev->nvsp_version >= NVSP_PROTOCOL_VERSION_2) limit = NETVSC_MTU - ETH_HLEN; if (mtu < NETVSC_MTU_MIN || mtu > limit) return -EINVAL; netif_device_detach(ndev); was_opened = rndis_filter_opened(nvdev); if (was_opened) rndis_filter_close(nvdev); memset(&device_info, 0, sizeof(device_info)); device_info.ring_size = ring_size; device_info.num_chn = nvdev->num_chn; rndis_filter_device_remove(hdev, nvdev); ndev->mtu = mtu; nvdev = rndis_filter_device_add(hdev, &device_info); if (IS_ERR(nvdev)) { ret = PTR_ERR(nvdev); /* Attempt rollback to original MTU */ ndev->mtu = orig_mtu; rndis_filter_device_add(hdev, &device_info); } if (was_opened) rndis_filter_open(nvdev); netif_device_attach(ndev); /* We may have missed link change notifications */ schedule_delayed_work(&ndevctx->dwork, 0); return ret; }
static int netvsc_change_mtu(struct net_device *ndev, int mtu) { struct net_device_context *ndevctx = netdev_priv(ndev); struct hv_device *hdev = ndevctx->device_ctx; struct netvsc_device *nvdev = hv_get_drvdata(hdev); struct netvsc_device_info device_info; int limit = ETH_DATA_LEN; if (nvdev == NULL || nvdev->destroy) return -ENODEV; if (nvdev->nvsp_version >= NVSP_PROTOCOL_VERSION_2) limit = NETVSC_MTU - ETH_HLEN; if (mtu < 68 || mtu > limit) return -EINVAL; nvdev->start_remove = true; cancel_work_sync(&ndevctx->work); netif_tx_disable(ndev); rndis_filter_device_remove(hdev); ndev->mtu = mtu; ndevctx->device_ctx = hdev; hv_set_drvdata(hdev, ndev); device_info.ring_size = ring_size; rndis_filter_device_add(hdev, &device_info); netif_wake_queue(ndev); return 0; }
static int netvsc_probe(struct hv_device *dev, const struct hv_vmbus_device_id *dev_id) { struct net_device *net = NULL; struct net_device_context *net_device_ctx; struct netvsc_device_info device_info; struct netvsc_device *nvdev; int ret; net = alloc_etherdev_mq(sizeof(struct net_device_context), num_online_cpus()); if (!net) return -ENOMEM; netif_carrier_off(net); net_device_ctx = netdev_priv(net); net_device_ctx->device_ctx = dev; hv_set_drvdata(dev, net); INIT_DELAYED_WORK(&net_device_ctx->dwork, netvsc_link_change); INIT_WORK(&net_device_ctx->work, do_set_multicast); net->netdev_ops = &device_ops; net->hw_features = NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO; net->features = NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_SG | NETIF_F_RXCSUM | NETIF_F_IP_CSUM | NETIF_F_TSO; net->ethtool_ops = ðtool_ops; SET_NETDEV_DEV(net, &dev->device); /* Notify the netvsc driver of the new device */ device_info.ring_size = ring_size; ret = rndis_filter_device_add(dev, &device_info); if (ret != 0) { netdev_err(net, "unable to add netvsc device (ret %d)\n", ret); free_netdev(net); hv_set_drvdata(dev, NULL); return ret; } memcpy(net->dev_addr, device_info.mac_adr, ETH_ALEN); nvdev = hv_get_drvdata(dev); netif_set_real_num_tx_queues(net, nvdev->num_chn); netif_set_real_num_rx_queues(net, nvdev->num_chn); ret = register_netdev(net); if (ret != 0) { pr_err("Unable to register netdev.\n"); rndis_filter_device_remove(dev); free_netdev(net); } else { schedule_delayed_work(&net_device_ctx->dwork, 0); } return ret; }
static int netvsc_change_mtu(struct net_device *ndev, int mtu) { struct net_device_context *ndevctx = netdev_priv(ndev); struct netvsc_device *nvdev = ndevctx->nvdev; struct hv_device *hdev = ndevctx->device_ctx; struct netvsc_device_info device_info; int limit = ETH_DATA_LEN; u32 num_chn; int ret = 0; if (ndevctx->start_remove || !nvdev || nvdev->destroy) return -ENODEV; if (nvdev->nvsp_version >= NVSP_PROTOCOL_VERSION_2) limit = NETVSC_MTU - ETH_HLEN; if (mtu < NETVSC_MTU_MIN || mtu > limit) return -EINVAL; ret = netvsc_close(ndev); if (ret) goto out; num_chn = nvdev->num_chn; ndevctx->start_remove = true; rndis_filter_device_remove(hdev); ndev->mtu = mtu; memset(&device_info, 0, sizeof(device_info)); device_info.ring_size = ring_size; device_info.num_chn = num_chn; device_info.max_num_vrss_chns = max_num_vrss_chns; rndis_filter_device_add(hdev, &device_info); out: netvsc_open(ndev); ndevctx->start_remove = false; /* We may have missed link change notifications */ schedule_delayed_work(&ndevctx->dwork, 0); return ret; }
static int netvsc_change_mtu(struct net_device *ndev, int mtu) { struct net_device_context *ndevctx = netdev_priv(ndev); struct netvsc_device *nvdev = rtnl_dereference(ndevctx->nvdev); struct hv_device *hdev = ndevctx->device_ctx; struct netvsc_device_info device_info; bool was_running; int ret = 0; if (!nvdev || nvdev->destroy) return -ENODEV; was_running = netif_running(ndev); if (was_running) { ret = netvsc_close(ndev); if (ret) return ret; } memset(&device_info, 0, sizeof(device_info)); device_info.ring_size = ring_size; device_info.num_chn = nvdev->num_chn; device_info.max_num_vrss_chns = nvdev->num_chn; rndis_filter_device_remove(hdev, nvdev); /* 'nvdev' has been freed in rndis_filter_device_remove() -> * netvsc_device_remove () -> free_netvsc_device(). * We mustn't access it before it's re-created in * rndis_filter_device_add() -> netvsc_device_add(). */ ndev->mtu = mtu; rndis_filter_device_add(hdev, &device_info); if (was_running) ret = netvsc_open(ndev); /* We may have missed link change notifications */ schedule_delayed_work(&ndevctx->dwork, 0); return ret; }
static int netvsc_change_mtu(struct net_device *ndev, int mtu) { struct net_device_context *ndevctx = netdev_priv(ndev); struct hv_device *hdev = ndevctx->device_ctx; struct netvsc_device *nvdev = hv_get_drvdata(hdev); struct netvsc_device_info device_info; int limit = ETH_DATA_LEN; int ret = 0; if (nvdev == NULL || nvdev->destroy) return -ENODEV; if (nvdev->nvsp_version >= NVSP_PROTOCOL_VERSION_2) limit = NETVSC_MTU - ETH_HLEN; if (mtu < NETVSC_MTU_MIN || mtu > limit) return -EINVAL; ret = netvsc_close(ndev); if (ret) goto out; nvdev->start_remove = true; rndis_filter_device_remove(hdev); ndev->mtu = mtu; ndevctx->device_ctx = hdev; hv_set_drvdata(hdev, ndev); memset(&device_info, 0, sizeof(device_info)); device_info.ring_size = ring_size; device_info.num_chn = nvdev->num_chn; device_info.max_num_vrss_chns = max_num_vrss_chns; rndis_filter_device_add(hdev, &device_info); out: netvsc_open(ndev); return ret; }
static int netvsc_set_queues(struct net_device *net, struct hv_device *dev, u32 num_chn) { struct netvsc_device_info device_info; int ret; memset(&device_info, 0, sizeof(device_info)); device_info.num_chn = num_chn; device_info.ring_size = ring_size; device_info.max_num_vrss_chns = num_chn; ret = rndis_filter_device_add(dev, &device_info); if (ret) return ret; ret = netif_set_real_num_tx_queues(net, num_chn); if (ret) return ret; ret = netif_set_real_num_rx_queues(net, num_chn); return ret; }
static int netvsc_probe(struct hv_device *dev, const struct hv_vmbus_device_id *dev_id) { struct net_device *net = NULL; struct net_device_context *net_device_ctx; struct netvsc_device_info device_info; struct netvsc_device *nvdev; int ret; net = alloc_etherdev(sizeof(struct net_device_context)); if (!net) return -ENOMEM; netif_carrier_off(net); net_device_ctx = netdev_priv(net); net_device_ctx->device_ctx = dev; net_device_ctx->msg_enable = netif_msg_init(debug, default_msg); if (netif_msg_probe(net_device_ctx)) netdev_dbg(net, "netvsc msg_enable: %d\n", net_device_ctx->msg_enable); hv_set_drvdata(dev, net); INIT_DELAYED_WORK(&net_device_ctx->dwork, netvsc_link_change); INIT_WORK(&net_device_ctx->work, do_set_multicast, (void *)&net_device_ctx->work); #if defined(RHEL_RELEASE_VERSION) && (RHEL_RELEASE_CODE > 1291) net->netdev_ops = &device_ops; #else net->open = netvsc_open; net->hard_start_xmit = netvsc_start_xmit; net->stop = netvsc_close; net->get_stats = netvsc_get_stats; net->set_multicast_list = netvsc_set_multicast_list; net->change_mtu = netvsc_change_mtu; #endif #if defined(RHEL_RELEASE_VERSION) && (RHEL_RELEASE_CODE > 1291) net->hw_features = NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO; #endif net->features = NETIF_F_HW_VLAN_TX | NETIF_F_SG | NETIF_F_RXCSUM | NETIF_F_IP_CSUM | NETIF_F_TSO; net->ethtool_ops = ðtool_ops; SET_NETDEV_DEV(net, &dev->device); /* Notify the netvsc driver of the new device */ device_info.ring_size = ring_size; ret = rndis_filter_device_add(dev, &device_info); if (ret != 0) { netdev_err(net, "unable to add netvsc device (ret %d)\n", ret); free_netdev(net); hv_set_drvdata(dev, NULL); return ret; } memcpy(net->dev_addr, device_info.mac_adr, ETH_ALEN); nvdev = hv_get_drvdata(dev); #ifdef NOTYET netif_set_real_num_tx_queues(net, nvdev->num_chn); netif_set_real_num_rx_queues(net, nvdev->num_chn); dev_info(&dev->device, "real num tx,rx queues:%u, %u\n", net->real_num_tx_queues, nvdev->num_chn); #endif ret = register_netdev(net); if (ret != 0) { pr_err("Unable to register netdev.\n"); rndis_filter_device_remove(dev); free_netdev(net); } else { schedule_delayed_work(&net_device_ctx->dwork.work, 0); } return ret; }
static int netvsc_set_channels(struct net_device *net, struct ethtool_channels *channels) { struct net_device_context *net_device_ctx = netdev_priv(net); struct hv_device *dev = net_device_ctx->device_ctx; struct netvsc_device *nvdev = net_device_ctx->nvdev; struct netvsc_device_info device_info; u32 num_chn; u32 max_chn; int ret = 0; bool recovering = false; if (net_device_ctx->start_remove || !nvdev || nvdev->destroy) return -ENODEV; num_chn = nvdev->num_chn; max_chn = min_t(u32, nvdev->max_chn, num_online_cpus()); if (nvdev->nvsp_version < NVSP_PROTOCOL_VERSION_5) { pr_info("vRSS unsupported before NVSP Version 5\n"); return -EINVAL; } /* We do not support rx, tx, or other */ if (!channels || channels->rx_count || channels->tx_count || channels->other_count || (channels->combined_count < 1)) return -EINVAL; if (channels->combined_count > max_chn) { pr_info("combined channels too high, using %d\n", max_chn); channels->combined_count = max_chn; } ret = netvsc_close(net); if (ret) goto out; do_set: net_device_ctx->start_remove = true; rndis_filter_device_remove(dev); nvdev->num_chn = channels->combined_count; memset(&device_info, 0, sizeof(device_info)); device_info.num_chn = nvdev->num_chn; /* passed to RNDIS */ device_info.ring_size = ring_size; device_info.max_num_vrss_chns = max_num_vrss_chns; ret = rndis_filter_device_add(dev, &device_info); if (ret) { if (recovering) { netdev_err(net, "unable to add netvsc device (ret %d)\n", ret); return ret; } goto recover; } nvdev = net_device_ctx->nvdev; ret = netif_set_real_num_tx_queues(net, nvdev->num_chn); if (ret) { if (recovering) { netdev_err(net, "could not set tx queue count (ret %d)\n", ret); return ret; } goto recover; } ret = netif_set_real_num_rx_queues(net, nvdev->num_chn); if (ret) { if (recovering) { netdev_err(net, "could not set rx queue count (ret %d)\n", ret); return ret; } goto recover; } out: netvsc_open(net); net_device_ctx->start_remove = false; /* We may have missed link change notifications */ schedule_delayed_work(&net_device_ctx->dwork, 0); return ret; recover: /* If the above failed, we attempt to recover through the same * process but with the original number of channels. */ netdev_err(net, "could not set channels, recovering\n"); recovering = true; channels->combined_count = num_chn; goto do_set; }
static int netvsc_probe(struct hv_device *dev, const struct hv_vmbus_device_id *dev_id) { struct net_device *net = NULL; struct net_device_context *net_device_ctx; struct netvsc_device_info device_info; struct netvsc_device *nvdev; int ret; u32 max_needed_headroom; net = alloc_etherdev_mq(sizeof(struct net_device_context), num_online_cpus()); if (!net) return -ENOMEM; max_needed_headroom = sizeof(struct hv_netvsc_packet) + RNDIS_AND_PPI_SIZE; netif_carrier_off(net); net_device_ctx = netdev_priv(net); net_device_ctx->device_ctx = dev; net_device_ctx->msg_enable = netif_msg_init(debug, default_msg); if (netif_msg_probe(net_device_ctx)) netdev_dbg(net, "netvsc msg_enable: %d\n", net_device_ctx->msg_enable); net_device_ctx->tx_stats = netdev_alloc_pcpu_stats(struct netvsc_stats); if (!net_device_ctx->tx_stats) { free_netdev(net); return -ENOMEM; } net_device_ctx->rx_stats = netdev_alloc_pcpu_stats(struct netvsc_stats); if (!net_device_ctx->rx_stats) { free_percpu(net_device_ctx->tx_stats); free_netdev(net); return -ENOMEM; } hv_set_drvdata(dev, net); INIT_DELAYED_WORK(&net_device_ctx->dwork, netvsc_link_change); INIT_WORK(&net_device_ctx->work, do_set_multicast); net->netdev_ops = &device_ops; net->hw_features = NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO; net->features = NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_SG | NETIF_F_RXCSUM | NETIF_F_IP_CSUM | NETIF_F_TSO; net->ethtool_ops = ðtool_ops; SET_NETDEV_DEV(net, &dev->device); /* * Request additional head room in the skb. * We will use this space to build the rndis * heaser and other state we need to maintain. */ net->needed_headroom = max_needed_headroom; /* Notify the netvsc driver of the new device */ device_info.ring_size = ring_size; device_info.max_num_vrss_chns = max_num_vrss_chns; ret = rndis_filter_device_add(dev, &device_info); if (ret != 0) { netdev_err(net, "unable to add netvsc device (ret %d)\n", ret); netvsc_free_netdev(net); hv_set_drvdata(dev, NULL); return ret; } memcpy(net->dev_addr, device_info.mac_adr, ETH_ALEN); nvdev = hv_get_drvdata(dev); netif_set_real_num_tx_queues(net, nvdev->num_chn); netif_set_real_num_rx_queues(net, nvdev->num_chn); ret = register_netdev(net); if (ret != 0) { pr_err("Unable to register netdev.\n"); rndis_filter_device_remove(dev); netvsc_free_netdev(net); } else { schedule_delayed_work(&net_device_ctx->dwork, 0); } return ret; }