From b441f79532ec13dc82d05c55badc4da1f62a6141 Mon Sep 17 00:00:00 2001 From: Haiyang Zhang Date: Thu, 5 Sep 2019 23:23:07 +0000 Subject: [PATCH 1/2] hv_netvsc: Allow scatter-gather feature to be tunable In a previous patch, the NETIF_F_SG was missing after the code changes. That caused the SG feature to be "fixed". This patch includes it into hw_features, so it is tunable again. Fixes: 23312a3be999 ("netvsc: negotiate checksum and segmentation parameters") Signed-off-by: Haiyang Zhang Signed-off-by: David S. Miller --- drivers/net/hyperv/hyperv_net.h | 2 +- drivers/net/hyperv/netvsc_drv.c | 4 ++-- drivers/net/hyperv/rndis_filter.c | 1 + 3 files changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h index ecc9af050387..670ef682f268 100644 --- a/drivers/net/hyperv/hyperv_net.h +++ b/drivers/net/hyperv/hyperv_net.h @@ -822,7 +822,7 @@ struct nvsp_message { #define NETVSC_SUPPORTED_HW_FEATURES (NETIF_F_RXCSUM | NETIF_F_IP_CSUM | \ NETIF_F_TSO | NETIF_F_IPV6_CSUM | \ - NETIF_F_TSO6 | NETIF_F_LRO) + NETIF_F_TSO6 | NETIF_F_LRO | NETIF_F_SG) #define VRSS_SEND_TAB_SIZE 16 /* must be power of 2 */ #define VRSS_CHANNEL_MAX 64 diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index 0a6cd2f1111f..1f1192ebcbbd 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -2313,8 +2313,8 @@ static int netvsc_probe(struct hv_device *dev, /* hw_features computed in rndis_netdev_set_hwcaps() */ net->features = net->hw_features | - NETIF_F_HIGHDMA | NETIF_F_SG | - NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX; + NETIF_F_HIGHDMA | NETIF_F_HW_VLAN_CTAG_TX | + NETIF_F_HW_VLAN_CTAG_RX; net->vlan_features = net->features; netdev_lockdep_set_classes(net); diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c index 317dbe9356c2..abaf8156d19d 100644 --- a/drivers/net/hyperv/rndis_filter.c +++ b/drivers/net/hyperv/rndis_filter.c @@ -1207,6 +1207,7 @@ static int rndis_netdev_set_hwcaps(struct rndis_device *rndis_device, /* Compute tx offload settings based on hw capabilities */ net->hw_features |= NETIF_F_RXCSUM; + net->hw_features |= NETIF_F_SG; if ((hwcaps.csum.ip4_txcsum & NDIS_TXCSUM_ALL_TCP4) == NDIS_TXCSUM_ALL_TCP4) { /* Can checksum TCP */ From 68622d071e555e1528f3e7807f30f73311c1acae Mon Sep 17 00:00:00 2001 From: Haiyang Zhang Date: Thu, 5 Sep 2019 23:23:12 +0000 Subject: [PATCH 2/2] hv_netvsc: Sync offloading features to VF NIC VF NIC may go down then come up during host servicing events. This causes the VF NIC offloading feature settings to roll back to the defaults. This patch can synchronize features from synthetic NIC to the VF NIC during ndo_set_features (ethtool -K), and netvsc_register_vf when VF comes back after host events. Signed-off-by: Haiyang Zhang Cc: Mark Bloch Signed-off-by: David S. Miller --- drivers/net/hyperv/netvsc_drv.c | 22 ++++++++++++++++++++-- 1 file changed, 20 insertions(+), 2 deletions(-) diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index 1f1192ebcbbd..39dddcd8b3cb 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -1785,13 +1785,15 @@ static int netvsc_set_features(struct net_device *ndev, netdev_features_t change = features ^ ndev->features; struct net_device_context *ndevctx = netdev_priv(ndev); struct netvsc_device *nvdev = rtnl_dereference(ndevctx->nvdev); + struct net_device *vf_netdev = rtnl_dereference(ndevctx->vf_netdev); struct ndis_offload_params offloads; + int ret = 0; if (!nvdev || nvdev->destroy) return -ENODEV; if (!(change & NETIF_F_LRO)) - return 0; + goto syncvf; memset(&offloads, 0, sizeof(struct ndis_offload_params)); @@ -1803,7 +1805,19 @@ static int netvsc_set_features(struct net_device *ndev, offloads.rsc_ip_v6 = NDIS_OFFLOAD_PARAMETERS_RSC_DISABLED; } - return rndis_filter_set_offload_params(ndev, nvdev, &offloads); + ret = rndis_filter_set_offload_params(ndev, nvdev, &offloads); + + if (ret) + features ^= NETIF_F_LRO; + +syncvf: + if (!vf_netdev) + return ret; + + vf_netdev->wanted_features = features; + netdev_update_features(vf_netdev); + + return ret; } static u32 netvsc_get_msglevel(struct net_device *ndev) @@ -2181,6 +2195,10 @@ static int netvsc_register_vf(struct net_device *vf_netdev) dev_hold(vf_netdev); rcu_assign_pointer(net_device_ctx->vf_netdev, vf_netdev); + + vf_netdev->wanted_features = ndev->features; + netdev_update_features(vf_netdev); + return NOTIFY_OK; }