From 23312a3be999c22ec70c0fdf9f01cdee05fac986 Mon Sep 17 00:00:00 2001 From: stephen hemminger Date: Tue, 24 Jan 2017 13:05:59 -0800 Subject: [PATCH] netvsc: negotiate checksum and segmentation parameters Redo how Hyper-V network driver negotiates offload features. Query the host to determine offload settings, and use the result. Also: * disable IPv4 header checksum offload (not used by Linux) * enable TSO only if host supports * enable UDP checksum offload if supported * don't advertise support for checksumming of non-IP protocols * adjust GSO maximum segment size * enable HIGHDMA Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller --- drivers/net/hyperv/hyperv_net.h | 149 +++++++++++++++++++++++++++--- drivers/net/hyperv/netvsc_drv.c | 92 ++++++++---------- drivers/net/hyperv/rndis_filter.c | 140 +++++++++++++++++++++++++--- 3 files changed, 305 insertions(+), 76 deletions(-) diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h index cce70ceba6d5..ccf94c16084c 100644 --- a/drivers/net/hyperv/hyperv_net.h +++ b/drivers/net/hyperv/hyperv_net.h @@ -34,6 +34,7 @@ #define NDIS_OBJECT_TYPE_RSS_CAPABILITIES 0x88 #define NDIS_OBJECT_TYPE_RSS_PARAMETERS 0x89 +#define NDIS_OBJECT_TYPE_OFFLOAD 0xa7 #define NDIS_RECEIVE_SCALE_CAPABILITIES_REVISION_2 2 #define NDIS_RECEIVE_SCALE_PARAMETERS_REVISION_2 2 @@ -685,6 +686,7 @@ struct net_device_context { struct work_struct work; u32 msg_enable; /* debug level */ + u32 tx_checksum_mask; struct netvsc_stats __percpu *tx_stats; struct netvsc_stats __percpu *rx_stats; @@ -934,7 +936,7 @@ struct ndis_pkt_8021q_info { }; }; -struct ndis_oject_header { +struct ndis_object_header { u8 type; u8 revision; u16 size; @@ -942,6 +944,9 @@ struct ndis_oject_header { #define NDIS_OBJECT_TYPE_DEFAULT 0x80 #define NDIS_OFFLOAD_PARAMETERS_REVISION_3 3 +#define NDIS_OFFLOAD_PARAMETERS_REVISION_2 2 +#define NDIS_OFFLOAD_PARAMETERS_REVISION_1 1 + #define NDIS_OFFLOAD_PARAMETERS_NO_CHANGE 0 #define NDIS_OFFLOAD_PARAMETERS_LSOV2_DISABLED 1 #define NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED 2 @@ -968,8 +973,135 @@ struct ndis_oject_header { #define OID_TCP_CONNECTION_OFFLOAD_HARDWARE_CAPABILITIES 0xFC01020F /* query */ #define OID_OFFLOAD_ENCAPSULATION 0x0101010A /* set/query */ +/* + * OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES + * ndis_type: NDIS_OBJTYPE_OFFLOAD + */ + +#define NDIS_OFFLOAD_ENCAP_NONE 0x0000 +#define NDIS_OFFLOAD_ENCAP_NULL 0x0001 +#define NDIS_OFFLOAD_ENCAP_8023 0x0002 +#define NDIS_OFFLOAD_ENCAP_8023PQ 0x0004 +#define NDIS_OFFLOAD_ENCAP_8023PQ_OOB 0x0008 +#define NDIS_OFFLOAD_ENCAP_RFC1483 0x0010 + +struct ndis_csum_offload { + u32 ip4_txenc; + u32 ip4_txcsum; +#define NDIS_TXCSUM_CAP_IP4OPT 0x001 +#define NDIS_TXCSUM_CAP_TCP4OPT 0x004 +#define NDIS_TXCSUM_CAP_TCP4 0x010 +#define NDIS_TXCSUM_CAP_UDP4 0x040 +#define NDIS_TXCSUM_CAP_IP4 0x100 + +#define NDIS_TXCSUM_ALL_TCP4 (NDIS_TXCSUM_CAP_TCP4 | NDIS_TXCSUM_CAP_TCP4OPT) + + u32 ip4_rxenc; + u32 ip4_rxcsum; +#define NDIS_RXCSUM_CAP_IP4OPT 0x001 +#define NDIS_RXCSUM_CAP_TCP4OPT 0x004 +#define NDIS_RXCSUM_CAP_TCP4 0x010 +#define NDIS_RXCSUM_CAP_UDP4 0x040 +#define NDIS_RXCSUM_CAP_IP4 0x100 + u32 ip6_txenc; + u32 ip6_txcsum; +#define NDIS_TXCSUM_CAP_IP6EXT 0x001 +#define NDIS_TXCSUM_CAP_TCP6OPT 0x004 +#define NDIS_TXCSUM_CAP_TCP6 0x010 +#define NDIS_TXCSUM_CAP_UDP6 0x040 + u32 ip6_rxenc; + u32 ip6_rxcsum; +#define NDIS_RXCSUM_CAP_IP6EXT 0x001 +#define NDIS_RXCSUM_CAP_TCP6OPT 0x004 +#define NDIS_RXCSUM_CAP_TCP6 0x010 +#define NDIS_RXCSUM_CAP_UDP6 0x040 + +#define NDIS_TXCSUM_ALL_TCP6 (NDIS_TXCSUM_CAP_TCP6 | \ + NDIS_TXCSUM_CAP_TCP6OPT | \ + NDIS_TXCSUM_CAP_IP6EXT) +}; + +struct ndis_lsov1_offload { + u32 encap; + u32 maxsize; + u32 minsegs; + u32 opts; +}; + +struct ndis_ipsecv1_offload { + u32 encap; + u32 ah_esp; + u32 xport_tun; + u32 ip4_opts; + u32 flags; + u32 ip4_ah; + u32 ip4_esp; +}; + +struct ndis_lsov2_offload { + u32 ip4_encap; + u32 ip4_maxsz; + u32 ip4_minsg; + u32 ip6_encap; + u32 ip6_maxsz; + u32 ip6_minsg; + u32 ip6_opts; +#define NDIS_LSOV2_CAP_IP6EXT 0x001 +#define NDIS_LSOV2_CAP_TCP6OPT 0x004 + +#define NDIS_LSOV2_CAP_IP6 (NDIS_LSOV2_CAP_IP6EXT | \ + NDIS_LSOV2_CAP_TCP6OPT) +}; + +struct ndis_ipsecv2_offload { + u32 encap; + u16 ip6; + u16 ip4opt; + u16 ip6ext; + u16 ah; + u16 esp; + u16 ah_esp; + u16 xport; + u16 tun; + u16 xport_tun; + u16 lso; + u16 extseq; + u32 udp_esp; + u32 auth; + u32 crypto; + u32 sa_caps; +}; + +struct ndis_rsc_offload { + u16 ip4; + u16 ip6; +}; + +struct ndis_encap_offload { + u32 flags; + u32 maxhdr; +}; + +struct ndis_offload { + struct ndis_object_header header; + struct ndis_csum_offload csum; + struct ndis_lsov1_offload lsov1; + struct ndis_ipsecv1_offload ipsecv1; + struct ndis_lsov2_offload lsov2; + u32 flags; + /* NDIS >= 6.1 */ + struct ndis_ipsecv2_offload ipsecv2; + /* NDIS >= 6.30 */ + struct ndis_rsc_offload rsc; + struct ndis_encap_offload encap_gre; +}; + +#define NDIS_OFFLOAD_SIZE sizeof(struct ndis_offload) +#define NDIS_OFFLOAD_SIZE_6_0 offsetof(struct ndis_offload, ipsecv2) +#define NDIS_OFFLOAD_SIZE_6_1 offsetof(struct ndis_offload, rsc) + struct ndis_offload_params { - struct ndis_oject_header header; + struct ndis_object_header header; u8 ip_v4_csum; u8 tcp_ip_v4_csum; u8 udp_ip_v4_csum; @@ -1296,15 +1428,10 @@ struct rndis_message { #define NDIS_PACKET_TYPE_FUNCTIONAL 0x00000400 #define NDIS_PACKET_TYPE_MAC_FRAME 0x00000800 -#define INFO_IPV4 2 -#define INFO_IPV6 4 -#define INFO_TCP 2 -#define INFO_UDP 4 - #define TRANSPORT_INFO_NOT_IP 0 -#define TRANSPORT_INFO_IPV4_TCP ((INFO_IPV4 << 16) | INFO_TCP) -#define TRANSPORT_INFO_IPV4_UDP ((INFO_IPV4 << 16) | INFO_UDP) -#define TRANSPORT_INFO_IPV6_TCP ((INFO_IPV6 << 16) | INFO_TCP) -#define TRANSPORT_INFO_IPV6_UDP ((INFO_IPV6 << 16) | INFO_UDP) +#define TRANSPORT_INFO_IPV4_TCP 0x01 +#define TRANSPORT_INFO_IPV4_UDP 0x02 +#define TRANSPORT_INFO_IPV6_TCP 0x10 +#define TRANSPORT_INFO_IPV6_UDP 0x20 #endif /* _HYPERV_NET_H */ diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index eebeb9378bac..f26d9d2d475f 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -42,14 +42,6 @@ #define RING_SIZE_MIN 64 #define LINKCHANGE_INT (2 * HZ) -#define NETVSC_HW_FEATURES (NETIF_F_RXCSUM | \ - NETIF_F_SG | \ - NETIF_F_TSO | \ - NETIF_F_TSO6 | \ - NETIF_F_HW_CSUM) - -/* Restrict GSO size to account for NVGRE */ -#define NETVSC_GSO_MAX_SIZE 62768 static int ring_size = 128; module_param(ring_size, int, S_IRUGO); @@ -323,33 +315,25 @@ static int netvsc_get_slots(struct sk_buff *skb) return slots + frag_slots; } -static u32 get_net_transport_info(struct sk_buff *skb, u32 *trans_off) +static u32 net_checksum_info(struct sk_buff *skb) { - u32 ret_val = TRANSPORT_INFO_NOT_IP; - - if ((eth_hdr(skb)->h_proto != htons(ETH_P_IP)) && - (eth_hdr(skb)->h_proto != htons(ETH_P_IPV6))) { - goto not_ip; - } - - *trans_off = skb_transport_offset(skb); + if (skb->protocol == htons(ETH_P_IP)) { + struct iphdr *ip = ip_hdr(skb); - if ((eth_hdr(skb)->h_proto == htons(ETH_P_IP))) { - struct iphdr *iphdr = ip_hdr(skb); - - if (iphdr->protocol == IPPROTO_TCP) - ret_val = TRANSPORT_INFO_IPV4_TCP; - else if (iphdr->protocol == IPPROTO_UDP) - ret_val = TRANSPORT_INFO_IPV4_UDP; + if (ip->protocol == IPPROTO_TCP) + return TRANSPORT_INFO_IPV4_TCP; + else if (ip->protocol == IPPROTO_UDP) + return TRANSPORT_INFO_IPV4_UDP; } else { - if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) - ret_val = TRANSPORT_INFO_IPV6_TCP; + struct ipv6hdr *ip6 = ipv6_hdr(skb); + + if (ip6->nexthdr == IPPROTO_TCP) + return TRANSPORT_INFO_IPV6_TCP; else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) - ret_val = TRANSPORT_INFO_IPV6_UDP; + return TRANSPORT_INFO_IPV6_UDP; } -not_ip: - return ret_val; + return TRANSPORT_INFO_NOT_IP; } static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) @@ -362,9 +346,6 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) struct rndis_packet *rndis_pkt; u32 rndis_msg_size; struct rndis_per_packet_info *ppi; - struct ndis_tcp_ip_checksum_info *csum_info; - int hdr_offset; - u32 net_trans_info; u32 hash; u32 skb_length; struct hv_page_buffer page_buf[MAX_PAGE_BUFFER_COUNT]; @@ -445,13 +426,7 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) VLAN_PRIO_SHIFT; } - net_trans_info = get_net_transport_info(skb, &hdr_offset); - - /* - * Setup the sendside checksum offload only if this is not a - * GSO packet. - */ - if ((net_trans_info & (INFO_TCP | INFO_UDP)) && skb_is_gso(skb)) { + if (skb_is_gso(skb)) { struct ndis_tcp_lso_info *lso_info; rndis_msg_size += NDIS_LSO_PPI_SIZE; @@ -462,7 +437,7 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) ppi->ppi_offset); lso_info->lso_v2_transmit.type = NDIS_TCP_LARGE_SEND_OFFLOAD_V2_TYPE; - if (net_trans_info & (INFO_IPV4 << 16)) { + if (skb->protocol == htons(ETH_P_IP)) { lso_info->lso_v2_transmit.ip_version = NDIS_TCP_LARGE_SEND_OFFLOAD_IPV4; ip_hdr(skb)->tot_len = 0; @@ -478,10 +453,12 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); } - lso_info->lso_v2_transmit.tcp_header_offset = hdr_offset; + lso_info->lso_v2_transmit.tcp_header_offset = skb_transport_offset(skb); lso_info->lso_v2_transmit.mss = skb_shinfo(skb)->gso_size; } else if (skb->ip_summed == CHECKSUM_PARTIAL) { - if (net_trans_info & INFO_TCP) { + if (net_checksum_info(skb) & net_device_ctx->tx_checksum_mask) { + struct ndis_tcp_ip_checksum_info *csum_info; + rndis_msg_size += NDIS_CSUM_PPI_SIZE; ppi = init_ppi_data(rndis_msg, NDIS_CSUM_PPI_SIZE, TCPIP_CHKSUM_PKTINFO); @@ -489,15 +466,25 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) csum_info = (struct ndis_tcp_ip_checksum_info *)((void *)ppi + ppi->ppi_offset); - if (net_trans_info & (INFO_IPV4 << 16)) + csum_info->transmit.tcp_header_offset = skb_transport_offset(skb); + + if (skb->protocol == htons(ETH_P_IP)) { csum_info->transmit.is_ipv4 = 1; - else + + if (ip_hdr(skb)->protocol == IPPROTO_TCP) + csum_info->transmit.tcp_checksum = 1; + else + csum_info->transmit.udp_checksum = 1; + } else { csum_info->transmit.is_ipv6 = 1; - csum_info->transmit.tcp_checksum = 1; - csum_info->transmit.tcp_header_offset = hdr_offset; + if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) + csum_info->transmit.tcp_checksum = 1; + else + csum_info->transmit.udp_checksum = 1; + } } else { - /* UDP checksum (and other) offload is not supported. */ + /* Can't do offload of this type of checksum */ if (skb_checksum_help(skb)) goto drop; } @@ -1372,10 +1359,6 @@ static int netvsc_probe(struct hv_device *dev, INIT_LIST_HEAD(&net_device_ctx->reconfig_events); net->netdev_ops = &device_ops; - - net->hw_features = NETVSC_HW_FEATURES; - net->features = NETVSC_HW_FEATURES | NETIF_F_HW_VLAN_CTAG_TX; - net->ethtool_ops = ðtool_ops; SET_NETDEV_DEV(net, &dev->device); @@ -1395,10 +1378,15 @@ static int netvsc_probe(struct hv_device *dev, } memcpy(net->dev_addr, device_info.mac_adr, ETH_ALEN); + /* hw_features computed in rndis_filter_device_add */ + net->features = net->hw_features | + NETIF_F_HIGHDMA | NETIF_F_SG | + NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX; + net->vlan_features = net->features; + nvdev = net_device_ctx->nvdev; netif_set_real_num_tx_queues(net, nvdev->num_chn); netif_set_real_num_rx_queues(net, nvdev->num_chn); - netif_set_gso_max_size(net, NETVSC_GSO_MAX_SIZE); /* MTU range: 68 - 1500 or 65521 */ net->min_mtu = NETVSC_MTU_MIN; diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c index 113c7f4d1590..8f04be1d7421 100644 --- a/drivers/net/hyperv/rndis_filter.c +++ b/drivers/net/hyperv/rndis_filter.c @@ -485,7 +485,35 @@ static int rndis_filter_query_device(struct rndis_device *dev, u32 oid, query->info_buflen = 0; query->dev_vc_handle = 0; - if (oid == OID_GEN_RECEIVE_SCALE_CAPABILITIES) { + if (oid == OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES) { + struct net_device_context *ndevctx = netdev_priv(dev->ndev); + struct netvsc_device *nvdev = ndevctx->nvdev; + struct ndis_offload *hwcaps; + u32 nvsp_version = nvdev->nvsp_version; + u8 ndis_rev; + size_t size; + + if (nvsp_version >= NVSP_PROTOCOL_VERSION_5) { + ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_3; + size = NDIS_OFFLOAD_SIZE; + } else if (nvsp_version >= NVSP_PROTOCOL_VERSION_4) { + ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_2; + size = NDIS_OFFLOAD_SIZE_6_1; + } else { + ndis_rev = NDIS_OFFLOAD_PARAMETERS_REVISION_1; + size = NDIS_OFFLOAD_SIZE_6_0; + } + + request->request_msg.msg_len += size; + query->info_buflen = size; + hwcaps = (struct ndis_offload *) + ((unsigned long)query + query->info_buf_offset); + + hwcaps->header.type = NDIS_OBJECT_TYPE_OFFLOAD; + hwcaps->header.revision = ndis_rev; + hwcaps->header.size = size; + + } else if (oid == OID_GEN_RECEIVE_SCALE_CAPABILITIES) { struct ndis_recv_scale_cap *cap; request->request_msg.msg_len += @@ -526,6 +554,44 @@ static int rndis_filter_query_device(struct rndis_device *dev, u32 oid, return ret; } +/* Get the hardware offload capabilities */ +static int +rndis_query_hwcaps(struct rndis_device *dev, struct ndis_offload *caps) +{ + u32 caps_len = sizeof(*caps); + int ret; + + memset(caps, 0, sizeof(*caps)); + + ret = rndis_filter_query_device(dev, + OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES, + caps, &caps_len); + if (ret) + return ret; + + if (caps->header.type != NDIS_OBJECT_TYPE_OFFLOAD) { + netdev_warn(dev->ndev, "invalid NDIS objtype %#x\n", + caps->header.type); + return -EINVAL; + } + + if (caps->header.revision < NDIS_OFFLOAD_PARAMETERS_REVISION_1) { + netdev_warn(dev->ndev, "invalid NDIS objrev %x\n", + caps->header.revision); + return -EINVAL; + } + + if (caps->header.size > caps_len || + caps->header.size < NDIS_OFFLOAD_SIZE_6_0) { + netdev_warn(dev->ndev, + "invalid NDIS objsize %u, data size %u\n", + caps->header.size, caps_len); + return -EINVAL; + } + + return 0; +} + static int rndis_filter_query_device_mac(struct rndis_device *dev) { u32 size = ETH_ALEN; @@ -974,10 +1040,12 @@ int rndis_filter_device_add(struct hv_device *dev, struct netvsc_device *net_device; struct rndis_device *rndis_device; struct netvsc_device_info *device_info = additional_info; + struct ndis_offload hwcaps; struct ndis_offload_params offloads; struct nvsp_message *init_packet; struct ndis_recv_scale_cap rsscap; u32 rsscap_size = sizeof(struct ndis_recv_scale_cap); + unsigned int gso_max_size = GSO_MAX_SIZE; u32 mtu, size; u32 num_rss_qs; u32 sc_delta; @@ -1034,19 +1102,65 @@ int rndis_filter_device_add(struct hv_device *dev, memcpy(device_info->mac_adr, rndis_device->hw_mac_adr, ETH_ALEN); - /* Turn on the offloads; the host supports all of the relevant - * offloads. - */ + /* Find HW offload capabilities */ + ret = rndis_query_hwcaps(rndis_device, &hwcaps); + if (ret != 0) { + rndis_filter_device_remove(dev); + return ret; + } + + /* A value of zero means "no change"; now turn on what we want. */ memset(&offloads, 0, sizeof(struct ndis_offload_params)); - /* A value of zero means "no change"; now turn on what we - * want. - */ - offloads.ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED; - offloads.tcp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED; - offloads.udp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED; - offloads.tcp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED; - offloads.udp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED; - offloads.lso_v2_ipv4 = NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED; + + /* Linux does not care about IP checksum, always does in kernel */ + offloads.ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_DISABLED; + + /* Compute tx offload settings based on hw capabilities */ + net->hw_features = NETIF_F_RXCSUM; + + if ((hwcaps.csum.ip4_txcsum & NDIS_TXCSUM_ALL_TCP4) == NDIS_TXCSUM_ALL_TCP4) { + /* Can checksum TCP */ + net->hw_features |= NETIF_F_IP_CSUM; + net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV4_TCP; + + offloads.tcp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED; + + if (hwcaps.lsov2.ip4_encap & NDIS_OFFLOAD_ENCAP_8023) { + offloads.lso_v2_ipv4 = NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED; + net->hw_features |= NETIF_F_TSO; + + if (hwcaps.lsov2.ip4_maxsz < gso_max_size) + gso_max_size = hwcaps.lsov2.ip4_maxsz; + } + + if (hwcaps.csum.ip4_txcsum & NDIS_TXCSUM_CAP_UDP4) { + offloads.udp_ip_v4_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED; + net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV4_UDP; + } + } + + if ((hwcaps.csum.ip6_txcsum & NDIS_TXCSUM_ALL_TCP6) == NDIS_TXCSUM_ALL_TCP6) { + net->hw_features |= NETIF_F_IPV6_CSUM; + + offloads.tcp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED; + net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV6_TCP; + + if ((hwcaps.lsov2.ip6_encap & NDIS_OFFLOAD_ENCAP_8023) && + (hwcaps.lsov2.ip6_opts & NDIS_LSOV2_CAP_IP6) == NDIS_LSOV2_CAP_IP6) { + offloads.lso_v2_ipv6 = NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED; + net->hw_features |= NETIF_F_TSO6; + + if (hwcaps.lsov2.ip6_maxsz < gso_max_size) + gso_max_size = hwcaps.lsov2.ip6_maxsz; + } + + if (hwcaps.csum.ip6_txcsum & NDIS_TXCSUM_CAP_UDP6) { + offloads.udp_ip_v6_csum = NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED; + net_device_ctx->tx_checksum_mask |= TRANSPORT_INFO_IPV6_UDP; + } + } + + netif_set_gso_max_size(net, gso_max_size); ret = rndis_filter_set_offload_params(net, &offloads); if (ret) -- GitLab