[net-next 13/15] ice: Offload SCTP checksum

[Jeff Kirsher]

From: Anirudh Venkataramanan <anirudh.venkatarama...@intel.com>

This patch adds the ability to offload SCTP checksum calculations to the
NIC.

Signed-off-by: Anirudh Venkataramanan <anirudh.venkatarama...@intel.com>
Tested-by: Andrew Bowers <andrewx.bow...@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirs...@intel.com>
---
 drivers/net/ethernet/intel/ice/ice.h           | 1 +
 drivers/net/ethernet/intel/ice/ice_lan_tx_rx.h | 1 +
 drivers/net/ethernet/intel/ice/ice_main.c      | 1 +
 drivers/net/ethernet/intel/ice/ice_txrx.c      | 6 ++++++
 4 files changed, 9 insertions(+)

diff --git a/drivers/net/ethernet/intel/ice/ice.h 
b/drivers/net/ethernet/intel/ice/ice.h
index ac8bf7491d08..55944e089558 100644
--- a/drivers/net/ethernet/intel/ice/ice.h
+++ b/drivers/net/ethernet/intel/ice/ice.h
@@ -26,6 +26,7 @@
 #include <linux/bitmap.h>
 #include <linux/log2.h>
 #include <linux/ip.h>
+#include <linux/sctp.h>
 #include <linux/ipv6.h>
 #include <linux/if_bridge.h>
 #include <linux/avf/virtchnl.h>
diff --git a/drivers/net/ethernet/intel/ice/ice_lan_tx_rx.h 
b/drivers/net/ethernet/intel/ice/ice_lan_tx_rx.h
index bb51dd7defb5..bd7c01db8c63 100644
--- a/drivers/net/ethernet/intel/ice/ice_lan_tx_rx.h
+++ b/drivers/net/ethernet/intel/ice/ice_lan_tx_rx.h
@@ -346,6 +346,7 @@ enum ice_tx_desc_cmd_bits {
        ICE_TX_DESC_CMD_IIPT_IPV4               = 0x0040, /* 2 BITS */
        ICE_TX_DESC_CMD_IIPT_IPV4_CSUM          = 0x0060, /* 2 BITS */
        ICE_TX_DESC_CMD_L4T_EOFT_TCP            = 0x0100, /* 2 BITS */
+       ICE_TX_DESC_CMD_L4T_EOFT_SCTP           = 0x0200, /* 2 BITS */
        ICE_TX_DESC_CMD_L4T_EOFT_UDP            = 0x0300, /* 2 BITS */
 };
 
diff --git a/drivers/net/ethernet/intel/ice/ice_main.c 
b/drivers/net/ethernet/intel/ice/ice_main.c
index e59f8b29af49..f4bf6bda32a9 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -1528,6 +1528,7 @@ static int ice_cfg_netdev(struct ice_vsi *vsi)
 
        csumo_features = NETIF_F_RXCSUM   |
                         NETIF_F_IP_CSUM  |
+                        NETIF_F_SCTP_CRC |
                         NETIF_F_IPV6_CSUM;
 
        vlano_features = NETIF_F_HW_VLAN_CTAG_FILTER |
diff --git a/drivers/net/ethernet/intel/ice/ice_txrx.c 
b/drivers/net/ethernet/intel/ice/ice_txrx.c
index 384ac5c82e00..2357fcac996b 100644
--- a/drivers/net/ethernet/intel/ice/ice_txrx.c
+++ b/drivers/net/ethernet/intel/ice/ice_txrx.c
@@ -1465,6 +1465,12 @@ int ice_tx_csum(struct ice_tx_buf *first, struct 
ice_tx_offload_params *off)
                offset |= l4_len << ICE_TX_DESC_LEN_L4_LEN_S;
                break;
        case IPPROTO_SCTP:
+               /* enable SCTP checksum offload */
+               cmd |= ICE_TX_DESC_CMD_L4T_EOFT_SCTP;
+               l4_len = sizeof(struct sctphdr) >> 2;
+               offset |= l4_len << ICE_TX_DESC_LEN_L4_LEN_S;
+               break;
+
        default:
                if (first->tx_flags & ICE_TX_FLAGS_TSO)
                        return -1;
-- 
2.20.1