i40e/i40evf: Add TX/RX outer UDP checksum support for X722
X722 supports offloading of outer UDP TX and RX checksum for tunneled
packets. This patch exposes the support and leaves it enabled by
default.
Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Signed-off-by: Catherine Sullivan <catherine.sullivan@intel.com>
Tested-by: Jim Young <james.m.young@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ethernet/intel/i40evf/i40e_txrx.c b/drivers/net/ethernet/intel/i40evf/i40e_txrx.c
index 6dbcbca..7309479 100644
--- a/drivers/net/ethernet/intel/i40evf/i40e_txrx.c
+++ b/drivers/net/ethernet/intel/i40evf/i40e_txrx.c
@@ -1528,11 +1528,15 @@
struct iphdr *this_ip_hdr;
u32 network_hdr_len;
u8 l4_hdr = 0;
+ struct udphdr *oudph;
+ struct iphdr *oiph;
u32 l4_tunnel = 0;
if (skb->encapsulation) {
switch (ip_hdr(skb)->protocol) {
case IPPROTO_UDP:
+ oudph = udp_hdr(skb);
+ oiph = ip_hdr(skb);
l4_tunnel = I40E_TXD_CTX_UDP_TUNNELING;
*tx_flags |= I40E_TX_FLAGS_VXLAN_TUNNEL;
break;
@@ -1571,6 +1575,15 @@
}
+ if ((tx_ring->flags & I40E_TXR_FLAGS_OUTER_UDP_CSUM) &&
+ (l4_tunnel == I40E_TXD_CTX_UDP_TUNNELING) &&
+ (*cd_tunneling & I40E_TXD_CTX_QW0_EXT_IP_MASK)) {
+ oudph->check = ~csum_tcpudp_magic(oiph->saddr,
+ oiph->daddr,
+ (skb->len - skb_transport_offset(skb)),
+ IPPROTO_UDP, 0);
+ *cd_tunneling |= I40E_TXD_CTX_QW0_L4T_CS_MASK;
+ }
} else {
network_hdr_len = skb_network_header_len(skb);
this_ip_hdr = ip_hdr(skb);
diff --git a/drivers/net/ethernet/intel/i40evf/i40e_txrx.h b/drivers/net/ethernet/intel/i40evf/i40e_txrx.h
index 17bb59d..9a30f5d 100644
--- a/drivers/net/ethernet/intel/i40evf/i40e_txrx.h
+++ b/drivers/net/ethernet/intel/i40evf/i40e_txrx.h
@@ -264,6 +264,8 @@
u16 flags;
#define I40E_TXR_FLAGS_WB_ON_ITR BIT(0)
+#define I40E_TXR_FLAGS_OUTER_UDP_CSUM BIT(1)
+
/* stats structs */
struct i40e_queue_stats stats;
struct u64_stats_sync syncp;
diff --git a/drivers/net/ethernet/intel/i40evf/i40e_type.h b/drivers/net/ethernet/intel/i40evf/i40e_type.h
index 627bf76..e32dc0b 100644
--- a/drivers/net/ethernet/intel/i40evf/i40e_type.h
+++ b/drivers/net/ethernet/intel/i40evf/i40e_type.h
@@ -601,14 +601,18 @@
I40E_RX_DESC_STATUS_CRCP_SHIFT = 4,
I40E_RX_DESC_STATUS_TSYNINDX_SHIFT = 5, /* 2 BITS */
I40E_RX_DESC_STATUS_TSYNVALID_SHIFT = 7,
- I40E_RX_DESC_STATUS_PIF_SHIFT = 8,
+ /* Note: Bit 8 is reserved in X710 and XL710 */
+ I40E_RX_DESC_STATUS_EXT_UDP_0_SHIFT = 8,
I40E_RX_DESC_STATUS_UMBCAST_SHIFT = 9, /* 2 BITS */
I40E_RX_DESC_STATUS_FLM_SHIFT = 11,
I40E_RX_DESC_STATUS_FLTSTAT_SHIFT = 12, /* 2 BITS */
I40E_RX_DESC_STATUS_LPBK_SHIFT = 14,
I40E_RX_DESC_STATUS_IPV6EXADD_SHIFT = 15,
I40E_RX_DESC_STATUS_RESERVED_SHIFT = 16, /* 2 BITS */
- I40E_RX_DESC_STATUS_UDP_0_SHIFT = 18,
+ /* Note: For non-tunnel packets INT_UDP_0 is the right status for
+ * UDP header
+ */
+ I40E_RX_DESC_STATUS_INT_UDP_0_SHIFT = 18,
I40E_RX_DESC_STATUS_LAST /* this entry must be last!!! */
};
@@ -949,6 +953,8 @@
#define I40E_TXD_CTX_QW0_DECTTL_MASK (0xFULL << \
I40E_TXD_CTX_QW0_DECTTL_SHIFT)
+#define I40E_TXD_CTX_QW0_L4T_CS_SHIFT 23
+#define I40E_TXD_CTX_QW0_L4T_CS_MASK BIT_ULL(I40E_TXD_CTX_QW0_L4T_CS_SHIFT)
struct i40e_filter_program_desc {
__le32 qindex_flex_ptype_vsi;
__le32 rsvd;