mirror of https://gitee.com/openkylin/linux.git
net: hns3: combine len and checksum handling for inner and outer header.
When filling len and checksum info to description, there is some similar checking or calculation. So this patch adds hns3_set_l2l3l4 to fill the inner(/normal) header's len and checksum info. If it is a encapsulation skb, it calls hns3_set_outer_l2l3l4 to handle the outer header's len and checksum info, in order to avoid some similar checking or calculation. Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com> Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yunsheng Lin
David S. Miller
parent
07918fcde1
commit
757cd1e4a4
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@ -737,79 +737,6 @@ static int hns3_get_l4_protocol(struct sk_buff *skb, u8 *ol4_proto,
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return 0;
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}
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static void hns3_set_l2l3l4_len(struct sk_buff *skb, u8 ol4_proto,
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u8 il4_proto, u32 *type_cs_vlan_tso,
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u32 *ol_type_vlan_len_msec)
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{
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unsigned char *l2_hdr = skb->data;
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u8 l4_proto = ol4_proto;
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union l3_hdr_info l3;
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union l4_hdr_info l4;
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u32 l2_len;
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u32 l3_len;
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u32 l4_len;
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l3.hdr = skb_network_header(skb);
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l4.hdr = skb_transport_header(skb);
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/* tunnel packet */
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if (skb->encapsulation) {
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/* not MAC in UDP, MAC in GRE (0x6558) */
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if (!(ol4_proto == IPPROTO_UDP || ol4_proto == IPPROTO_GRE))
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return;
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/* compute OL2 header size, defined in 2 Bytes */
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l2_len = l3.hdr - skb->data;
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hns3_set_field(*ol_type_vlan_len_msec,
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HNS3_TXD_L2LEN_S, l2_len >> 1);
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/* compute OL3 header size, defined in 4 Bytes */
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l3_len = l4.hdr - l3.hdr;
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hns3_set_field(*ol_type_vlan_len_msec, HNS3_TXD_L3LEN_S,
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l3_len >> 2);
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l2_hdr = skb_inner_mac_header(skb);
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/* compute OL4 header size, defined in 4 Bytes. */
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l4_len = l2_hdr - l4.hdr;
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hns3_set_field(*ol_type_vlan_len_msec, HNS3_TXD_L4LEN_S,
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l4_len >> 2);
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/* switch to inner header */
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l2_hdr = skb_inner_mac_header(skb);
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l3.hdr = skb_inner_network_header(skb);
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l4.hdr = skb_inner_transport_header(skb);
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l4_proto = il4_proto;
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}
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l2_len = l3.hdr - l2_hdr;
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hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L2LEN_S, l2_len >> 1);
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/* compute inner(/normal) L3 header size, defined in 4 Bytes */
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l3_len = l4.hdr - l3.hdr;
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hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L3LEN_S, l3_len >> 2);
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/* compute inner(/normal) L4 header size, defined in 4 Bytes */
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switch (l4_proto) {
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case IPPROTO_TCP:
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hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4LEN_S,
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l4.tcp->doff);
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break;
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case IPPROTO_SCTP:
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hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4LEN_S,
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(sizeof(struct sctphdr) >> 2));
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break;
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case IPPROTO_UDP:
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hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4LEN_S,
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(sizeof(struct udphdr) >> 2));
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break;
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default:
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/* skb packet types not supported by hardware,
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* txbd len fild doesn't be filled.
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*/
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return;
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}
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}
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/* when skb->encapsulation is 0, skb->ip_summed is CHECKSUM_PARTIAL
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* and it is udp packet, which has a dest port as the IANA assigned.
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* the hardware is expected to do the checksum offload, but the
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@ -831,46 +758,71 @@ static bool hns3_tunnel_csum_bug(struct sk_buff *skb)
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return true;
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}
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static int hns3_set_l3l4_type_csum(struct sk_buff *skb, u8 ol4_proto,
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u8 il4_proto, u32 *type_cs_vlan_tso,
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u32 *ol_type_vlan_len_msec)
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static void hns3_set_outer_l2l3l4(struct sk_buff *skb, u8 ol4_proto,
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u32 *ol_type_vlan_len_msec)
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{
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u32 l2_len, l3_len, l4_len;
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unsigned char *il2_hdr;
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union l3_hdr_info l3;
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u32 l4_proto = ol4_proto;
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union l4_hdr_info l4;
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l3.hdr = skb_network_header(skb);
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l4.hdr = skb_transport_header(skb);
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/* define OL3 type and tunnel type(OL4).*/
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/* compute OL2 header size, defined in 2 Bytes */
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l2_len = l3.hdr - skb->data;
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hns3_set_field(*ol_type_vlan_len_msec, HNS3_TXD_L2LEN_S, l2_len >> 1);
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/* compute OL3 header size, defined in 4 Bytes */
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l3_len = l4.hdr - l3.hdr;
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hns3_set_field(*ol_type_vlan_len_msec, HNS3_TXD_L3LEN_S, l3_len >> 2);
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il2_hdr = skb_inner_mac_header(skb);
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/* compute OL4 header size, defined in 4 Bytes. */
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l4_len = il2_hdr - l4.hdr;
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hns3_set_field(*ol_type_vlan_len_msec, HNS3_TXD_L4LEN_S, l4_len >> 2);
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/* define outer network header type */
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if (skb->protocol == htons(ETH_P_IP)) {
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if (skb_is_gso(skb))
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hns3_set_field(*ol_type_vlan_len_msec,
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HNS3_TXD_OL3T_S,
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HNS3_OL3T_IPV4_CSUM);
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else
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hns3_set_field(*ol_type_vlan_len_msec,
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HNS3_TXD_OL3T_S,
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HNS3_OL3T_IPV4_NO_CSUM);
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} else if (skb->protocol == htons(ETH_P_IPV6)) {
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hns3_set_field(*ol_type_vlan_len_msec, HNS3_TXD_OL3T_S,
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HNS3_OL3T_IPV6);
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}
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if (ol4_proto == IPPROTO_UDP)
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hns3_set_field(*ol_type_vlan_len_msec, HNS3_TXD_TUNTYPE_S,
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HNS3_TUN_MAC_IN_UDP);
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else if (ol4_proto == IPPROTO_GRE)
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hns3_set_field(*ol_type_vlan_len_msec, HNS3_TXD_TUNTYPE_S,
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HNS3_TUN_NVGRE);
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}
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static int hns3_set_l2l3l4(struct sk_buff *skb, u8 ol4_proto,
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u8 il4_proto, u32 *type_cs_vlan_tso,
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u32 *ol_type_vlan_len_msec)
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{
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unsigned char *l2_hdr = l2_hdr = skb->data;
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u32 l4_proto = ol4_proto;
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union l4_hdr_info l4;
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union l3_hdr_info l3;
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u32 l2_len, l3_len;
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l4.hdr = skb_transport_header(skb);
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l3.hdr = skb_network_header(skb);
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/* handle encapsulation skb */
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if (skb->encapsulation) {
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/* define outer network header type.*/
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if (skb->protocol == htons(ETH_P_IP)) {
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if (skb_is_gso(skb))
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hns3_set_field(*ol_type_vlan_len_msec,
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HNS3_TXD_OL3T_S,
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HNS3_OL3T_IPV4_CSUM);
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else
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hns3_set_field(*ol_type_vlan_len_msec,
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HNS3_TXD_OL3T_S,
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HNS3_OL3T_IPV4_NO_CSUM);
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} else if (skb->protocol == htons(ETH_P_IPV6)) {
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hns3_set_field(*ol_type_vlan_len_msec, HNS3_TXD_OL3T_S,
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HNS3_OL3T_IPV6);
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}
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/* define tunnel type(OL4).*/
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switch (l4_proto) {
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case IPPROTO_UDP:
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hns3_set_field(*ol_type_vlan_len_msec,
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HNS3_TXD_TUNTYPE_S,
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HNS3_TUN_MAC_IN_UDP);
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break;
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case IPPROTO_GRE:
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hns3_set_field(*ol_type_vlan_len_msec,
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HNS3_TXD_TUNTYPE_S,
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HNS3_TUN_NVGRE);
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break;
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default:
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/* If this is a not UDP/GRE encapsulation skb */
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if (!(ol4_proto == IPPROTO_UDP || ol4_proto == IPPROTO_GRE)) {
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/* drop the skb tunnel packet if hardware don't support,
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* because hardware can't calculate csum when TSO.
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*/
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@ -884,7 +836,12 @@ static int hns3_set_l3l4_type_csum(struct sk_buff *skb, u8 ol4_proto,
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return 0;
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}
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hns3_set_outer_l2l3l4(skb, ol4_proto, ol_type_vlan_len_msec);
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/* switch to inner header */
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l2_hdr = skb_inner_mac_header(skb);
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l3.hdr = skb_inner_network_header(skb);
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l4.hdr = skb_inner_transport_header(skb);
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l4_proto = il4_proto;
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}
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@ -902,11 +859,22 @@ static int hns3_set_l3l4_type_csum(struct sk_buff *skb, u8 ol4_proto,
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HNS3_L3T_IPV6);
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}
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/* compute inner(/normal) L2 header size, defined in 2 Bytes */
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l2_len = l3.hdr - l2_hdr;
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hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L2LEN_S, l2_len >> 1);
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/* compute inner(/normal) L3 header size, defined in 4 Bytes */
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l3_len = l4.hdr - l3.hdr;
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hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L3LEN_S, l3_len >> 2);
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/* compute inner(/normal) L4 header size, defined in 4 Bytes */
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switch (l4_proto) {
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case IPPROTO_TCP:
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hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4CS_B, 1);
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hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4T_S,
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HNS3_L4T_TCP);
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hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4LEN_S,
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l4.tcp->doff);
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break;
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case IPPROTO_UDP:
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if (hns3_tunnel_csum_bug(skb))
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@ -915,11 +883,15 @@ static int hns3_set_l3l4_type_csum(struct sk_buff *skb, u8 ol4_proto,
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hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4CS_B, 1);
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hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4T_S,
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HNS3_L4T_UDP);
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hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4LEN_S,
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(sizeof(struct udphdr) >> 2));
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break;
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case IPPROTO_SCTP:
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hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4CS_B, 1);
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hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4T_S,
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HNS3_L4T_SCTP);
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hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4LEN_S,
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(sizeof(struct sctphdr) >> 2));
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break;
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default:
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/* drop the skb tunnel packet if hardware don't support,
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@ -1050,12 +1022,10 @@ static int hns3_fill_desc(struct hns3_enet_ring *ring, void *priv,
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ret = hns3_get_l4_protocol(skb, &ol4_proto, &il4_proto);
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if (unlikely(ret))
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return ret;
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hns3_set_l2l3l4_len(skb, ol4_proto, il4_proto,
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&type_cs_vlan_tso,
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&ol_type_vlan_len_msec);
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ret = hns3_set_l3l4_type_csum(skb, ol4_proto, il4_proto,
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&type_cs_vlan_tso,
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&ol_type_vlan_len_msec);
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ret = hns3_set_l2l3l4(skb, ol4_proto, il4_proto,
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&type_cs_vlan_tso,
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&ol_type_vlan_len_msec);
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if (unlikely(ret))
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return ret;
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