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Date: Tue, 24 Jan 2017 13:05:59 -0800
From: Stephen Hemminger <stephen@...workplumber.org>
To: davem@...emloft.net, kys@...rosoft.com
Cc: netdev@...r.kernel.org, Stephen Hemminger <sthemmin@...rosoft.com>
Subject: [PATCH 02/18] 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 <sthemmin@...rosoft.com>
---
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)
--
2.11.0
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