forked from Minki/linux
qlcnic: Add VXLAN Tx offload support
This patch adds LSO, LSO6 and Tx checksum offload support for VXLAN encapsulated packets on 83xx/84xx series adapters. Signed-off-by: Shahed Shaikh <shahed.shaikh@qlogic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
parent
c65d753372
commit
381709de15
drivers/net/ethernet/qlogic/qlcnic
@ -169,11 +169,20 @@ struct cmd_desc_type0 {
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__le64 addr_buffer2;
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__le16 reference_handle;
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__le16 encap_descr; /* 15:10 offset of outer L3 header,
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* 9:6 number of 32bit words in outer L3 header,
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* 5 offload outer L4 checksum,
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* 4 offload outer L3 checksum,
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* 3 Inner L4 type, TCP=0, UDP=1,
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* 2 Inner L3 type, IPv4=0, IPv6=1,
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* 1 Outer L3 type,IPv4=0, IPv6=1,
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* 0 type of encapsulation, GRE=0, VXLAN=1
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*/
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__le16 mss;
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u8 port_ctxid; /* 7:4 ctxid 3:0 port */
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u8 total_hdr_length; /* LSO only : MAC+IP+TCP Hdr size */
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__le16 conn_id; /* IPSec offoad only */
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u8 hdr_length; /* LSO only : MAC+IP+TCP Hdr size */
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u8 outer_hdr_length; /* Encapsulation only */
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u8 rsvd1;
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__le64 addr_buffer3;
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__le64 addr_buffer1;
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@ -183,7 +192,9 @@ struct cmd_desc_type0 {
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__le64 addr_buffer4;
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u8 eth_addr[ETH_ALEN];
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__le16 vlan_TCI;
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__le16 vlan_TCI; /* In case of encapsulation,
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* this is for outer VLAN
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*/
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} __attribute__ ((aligned(64)));
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@ -538,6 +549,8 @@ struct qlcnic_adapter_stats {
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u64 txbytes;
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u64 lrobytes;
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u64 lso_frames;
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u64 encap_lso_frames;
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u64 encap_tx_csummed;
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u64 xmit_on;
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u64 xmit_off;
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u64 skb_alloc_failure;
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@ -899,6 +912,9 @@ struct qlcnic_mac_vlan_list {
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#define QLCNIC_FW_CAPABILITY_2_BEACON BIT_7
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#define QLCNIC_FW_CAPABILITY_2_PER_PORT_ESWITCH_CFG BIT_9
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#define QLCNIC_83XX_FW_CAPAB_ENCAP_TX_OFFLOAD BIT_1
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#define QLCNIC_83XX_FW_CAPAB_ENCAP_CKO_OFFLOAD BIT_4
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/* module types */
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#define LINKEVENT_MODULE_NOT_PRESENT 1
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#define LINKEVENT_MODULE_OPTICAL_UNKNOWN 2
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@ -1806,6 +1822,12 @@ struct qlcnic_hardware_ops {
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extern struct qlcnic_nic_template qlcnic_vf_ops;
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static inline bool qlcnic_encap_tx_offload(struct qlcnic_adapter *adapter)
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{
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return adapter->ahw->extra_capability[0] &
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QLCNIC_83XX_FW_CAPAB_ENCAP_TX_OFFLOAD;
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}
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static inline int qlcnic_start_firmware(struct qlcnic_adapter *adapter)
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{
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return adapter->nic_ops->start_firmware(adapter);
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@ -47,6 +47,10 @@ static const struct qlcnic_stats qlcnic_gstrings_stats[] = {
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{"lro_pkts", QLC_SIZEOF(stats.lro_pkts), QLC_OFF(stats.lro_pkts)},
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{"lrobytes", QLC_SIZEOF(stats.lrobytes), QLC_OFF(stats.lrobytes)},
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{"lso_frames", QLC_SIZEOF(stats.lso_frames), QLC_OFF(stats.lso_frames)},
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{"encap_lso_frames", QLC_SIZEOF(stats.encap_lso_frames),
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QLC_OFF(stats.encap_lso_frames)},
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{"encap_tx_csummed", QLC_SIZEOF(stats.encap_tx_csummed),
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QLC_OFF(stats.encap_tx_csummed)},
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{"skb_alloc_failure", QLC_SIZEOF(stats.skb_alloc_failure),
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QLC_OFF(stats.skb_alloc_failure)},
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{"mac_filter_limit_overrun", QLC_SIZEOF(stats.mac_filter_limit_overrun),
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@ -13,16 +13,19 @@
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#include "qlcnic.h"
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#define TX_ETHER_PKT 0x01
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#define TX_TCP_PKT 0x02
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#define TX_UDP_PKT 0x03
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#define TX_IP_PKT 0x04
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#define TX_TCP_LSO 0x05
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#define TX_TCP_LSO6 0x06
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#define TX_TCPV6_PKT 0x0b
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#define TX_UDPV6_PKT 0x0c
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#define FLAGS_VLAN_TAGGED 0x10
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#define FLAGS_VLAN_OOB 0x40
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#define QLCNIC_TX_ETHER_PKT 0x01
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#define QLCNIC_TX_TCP_PKT 0x02
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#define QLCNIC_TX_UDP_PKT 0x03
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#define QLCNIC_TX_IP_PKT 0x04
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#define QLCNIC_TX_TCP_LSO 0x05
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#define QLCNIC_TX_TCP_LSO6 0x06
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#define QLCNIC_TX_ENCAP_PKT 0x07
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#define QLCNIC_TX_ENCAP_LSO 0x08
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#define QLCNIC_TX_TCPV6_PKT 0x0b
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#define QLCNIC_TX_UDPV6_PKT 0x0c
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#define QLCNIC_FLAGS_VLAN_TAGGED 0x10
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#define QLCNIC_FLAGS_VLAN_OOB 0x40
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#define qlcnic_set_tx_vlan_tci(cmd_desc, v) \
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(cmd_desc)->vlan_TCI = cpu_to_le16(v);
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@ -364,6 +367,101 @@ static void qlcnic_send_filter(struct qlcnic_adapter *adapter,
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spin_unlock(&adapter->mac_learn_lock);
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}
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#define QLCNIC_ENCAP_VXLAN_PKT BIT_0
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#define QLCNIC_ENCAP_OUTER_L3_IP6 BIT_1
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#define QLCNIC_ENCAP_INNER_L3_IP6 BIT_2
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#define QLCNIC_ENCAP_INNER_L4_UDP BIT_3
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#define QLCNIC_ENCAP_DO_L3_CSUM BIT_4
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#define QLCNIC_ENCAP_DO_L4_CSUM BIT_5
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static int qlcnic_tx_encap_pkt(struct qlcnic_adapter *adapter,
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struct cmd_desc_type0 *first_desc,
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struct sk_buff *skb,
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struct qlcnic_host_tx_ring *tx_ring)
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{
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u8 opcode = 0, inner_hdr_len = 0, outer_hdr_len = 0, total_hdr_len = 0;
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int copied, copy_len, descr_size;
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u32 producer = tx_ring->producer;
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struct cmd_desc_type0 *hwdesc;
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u16 flags = 0, encap_descr = 0;
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opcode = QLCNIC_TX_ETHER_PKT;
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encap_descr = QLCNIC_ENCAP_VXLAN_PKT;
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if (skb_is_gso(skb)) {
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inner_hdr_len = skb_inner_transport_header(skb) +
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inner_tcp_hdrlen(skb) -
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skb_inner_mac_header(skb);
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/* VXLAN header size = 8 */
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outer_hdr_len = skb_transport_offset(skb) + 8 +
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sizeof(struct udphdr);
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first_desc->outer_hdr_length = outer_hdr_len;
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total_hdr_len = inner_hdr_len + outer_hdr_len;
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encap_descr |= QLCNIC_ENCAP_DO_L3_CSUM |
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QLCNIC_ENCAP_DO_L4_CSUM;
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first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
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first_desc->hdr_length = inner_hdr_len;
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/* Copy inner and outer headers in Tx descriptor(s)
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* If total_hdr_len > cmd_desc_type0, use multiple
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* descriptors
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*/
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copied = 0;
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descr_size = (int)sizeof(struct cmd_desc_type0);
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while (copied < total_hdr_len) {
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copy_len = min(descr_size, (total_hdr_len - copied));
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hwdesc = &tx_ring->desc_head[producer];
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tx_ring->cmd_buf_arr[producer].skb = NULL;
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skb_copy_from_linear_data_offset(skb, copied,
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(char *)hwdesc,
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copy_len);
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copied += copy_len;
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producer = get_next_index(producer, tx_ring->num_desc);
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}
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tx_ring->producer = producer;
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/* Make sure updated tx_ring->producer is visible
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* for qlcnic_tx_avail()
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*/
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smp_mb();
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adapter->stats.encap_lso_frames++;
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opcode = QLCNIC_TX_ENCAP_LSO;
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} else if (skb->ip_summed == CHECKSUM_PARTIAL) {
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if (inner_ip_hdr(skb)->version == 6) {
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if (inner_ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
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encap_descr |= QLCNIC_ENCAP_INNER_L4_UDP;
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} else {
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if (inner_ip_hdr(skb)->protocol == IPPROTO_UDP)
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encap_descr |= QLCNIC_ENCAP_INNER_L4_UDP;
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}
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adapter->stats.encap_tx_csummed++;
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opcode = QLCNIC_TX_ENCAP_PKT;
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}
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/* Prepare first 16 bits of byte offset 16 of Tx descriptor */
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if (ip_hdr(skb)->version == 6)
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encap_descr |= QLCNIC_ENCAP_OUTER_L3_IP6;
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/* outer IP header's size in 32bit words size*/
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encap_descr |= (skb_network_header_len(skb) >> 2) << 6;
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/* outer IP header offset */
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encap_descr |= skb_network_offset(skb) << 10;
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first_desc->encap_descr = cpu_to_le16(encap_descr);
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first_desc->tcp_hdr_offset = skb_inner_transport_header(skb) -
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skb->data;
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first_desc->ip_hdr_offset = skb_inner_network_offset(skb);
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qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
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return 0;
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}
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static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter,
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struct cmd_desc_type0 *first_desc, struct sk_buff *skb,
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struct qlcnic_host_tx_ring *tx_ring)
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@ -378,11 +476,11 @@ static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter,
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if (protocol == ETH_P_8021Q) {
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vh = (struct vlan_ethhdr *)skb->data;
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flags = FLAGS_VLAN_TAGGED;
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flags = QLCNIC_FLAGS_VLAN_TAGGED;
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vlan_tci = ntohs(vh->h_vlan_TCI);
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protocol = ntohs(vh->h_vlan_encapsulated_proto);
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} else if (vlan_tx_tag_present(skb)) {
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flags = FLAGS_VLAN_OOB;
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flags = QLCNIC_FLAGS_VLAN_OOB;
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vlan_tci = vlan_tx_tag_get(skb);
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}
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if (unlikely(adapter->tx_pvid)) {
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@ -391,7 +489,7 @@ static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter,
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if (vlan_tci && (adapter->flags & QLCNIC_TAGGING_ENABLED))
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goto set_flags;
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flags = FLAGS_VLAN_OOB;
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flags = QLCNIC_FLAGS_VLAN_OOB;
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vlan_tci = adapter->tx_pvid;
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}
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set_flags:
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@ -402,25 +500,26 @@ set_flags:
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flags |= BIT_0;
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memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN);
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}
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opcode = TX_ETHER_PKT;
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opcode = QLCNIC_TX_ETHER_PKT;
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if (skb_is_gso(skb)) {
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hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
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first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
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first_desc->total_hdr_length = hdr_len;
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opcode = (protocol == ETH_P_IPV6) ? TX_TCP_LSO6 : TX_TCP_LSO;
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first_desc->hdr_length = hdr_len;
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opcode = (protocol == ETH_P_IPV6) ? QLCNIC_TX_TCP_LSO6 :
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QLCNIC_TX_TCP_LSO;
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/* For LSO, we need to copy the MAC/IP/TCP headers into
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* the descriptor ring */
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copied = 0;
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offset = 2;
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if (flags & FLAGS_VLAN_OOB) {
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first_desc->total_hdr_length += VLAN_HLEN;
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if (flags & QLCNIC_FLAGS_VLAN_OOB) {
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first_desc->hdr_length += VLAN_HLEN;
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first_desc->tcp_hdr_offset = VLAN_HLEN;
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first_desc->ip_hdr_offset = VLAN_HLEN;
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/* Only in case of TSO on vlan device */
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flags |= FLAGS_VLAN_TAGGED;
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flags |= QLCNIC_FLAGS_VLAN_TAGGED;
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/* Create a TSO vlan header template for firmware */
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hwdesc = &tx_ring->desc_head[producer];
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@ -464,16 +563,16 @@ set_flags:
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l4proto = ip_hdr(skb)->protocol;
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if (l4proto == IPPROTO_TCP)
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opcode = TX_TCP_PKT;
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opcode = QLCNIC_TX_TCP_PKT;
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else if (l4proto == IPPROTO_UDP)
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opcode = TX_UDP_PKT;
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opcode = QLCNIC_TX_UDP_PKT;
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} else if (protocol == ETH_P_IPV6) {
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l4proto = ipv6_hdr(skb)->nexthdr;
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if (l4proto == IPPROTO_TCP)
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opcode = TX_TCPV6_PKT;
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opcode = QLCNIC_TX_TCPV6_PKT;
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else if (l4proto == IPPROTO_UDP)
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opcode = TX_UDPV6_PKT;
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opcode = QLCNIC_TX_UDPV6_PKT;
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}
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}
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first_desc->tcp_hdr_offset += skb_transport_offset(skb);
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@ -563,6 +662,8 @@ netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
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struct ethhdr *phdr;
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int i, k, frag_count, delta = 0;
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u32 producer, num_txd;
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u16 protocol;
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bool l4_is_udp = false;
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if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
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netif_tx_stop_all_queues(netdev);
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@ -653,8 +754,23 @@ netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
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tx_ring->producer = get_next_index(producer, num_txd);
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smp_mb();
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if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb, tx_ring)))
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goto unwind_buff;
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protocol = ntohs(skb->protocol);
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if (protocol == ETH_P_IP)
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l4_is_udp = ip_hdr(skb)->protocol == IPPROTO_UDP;
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else if (protocol == ETH_P_IPV6)
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l4_is_udp = ipv6_hdr(skb)->nexthdr == IPPROTO_UDP;
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/* Check if it is a VXLAN packet */
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if (!skb->encapsulation || !l4_is_udp ||
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!qlcnic_encap_tx_offload(adapter)) {
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if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb,
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tx_ring)))
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goto unwind_buff;
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} else {
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if (unlikely(qlcnic_tx_encap_pkt(adapter, first_desc,
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skb, tx_ring)))
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goto unwind_buff;
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}
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if (adapter->drv_mac_learn)
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qlcnic_send_filter(adapter, first_desc, skb);
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@ -2205,6 +2205,16 @@ qlcnic_setup_netdev(struct qlcnic_adapter *adapter, struct net_device *netdev,
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if (adapter->ahw->capabilities & QLCNIC_FW_CAPABILITY_HW_LRO)
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netdev->features |= NETIF_F_LRO;
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if (qlcnic_encap_tx_offload(adapter)) {
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netdev->features |= NETIF_F_GSO_UDP_TUNNEL;
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/* encapsulation Tx offload supported by Adapter */
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netdev->hw_enc_features = NETIF_F_IP_CSUM |
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NETIF_F_GSO_UDP_TUNNEL |
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NETIF_F_TSO |
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NETIF_F_TSO6;
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}
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netdev->hw_features = netdev->features;
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netdev->priv_flags |= IFF_UNICAST_FLT;
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netdev->irq = adapter->msix_entries[0].vector;
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