ixgbe: Extend cls_u32 offload to support UDP headers

Added support to match on UDP fields in the transport layer.
Extended core logic to support multiple headers.

Verified with the following filters :

	handle 1: u32 divisor 1
	u32 ht 800: order 1 link 1: \
	offset at 0 mask 0f00 shift 6 plus 0 eat match ip protocol 6 ff
	u32 ht 1: order 2 \
	match tcp src 1024 ffff match tcp dst 23 ffff action drop
	handle 2: u32 divisor 1
	u32 ht 800: order 3 link 2: \
	offset at 0 mask 0f00 shift 6 plus 0 eat match ip protocol 17 ff
	u32 ht 2: order 4 \
	match udp src 1025 ffff match udp dst 24 ffff action drop

Signed-off-by: Amritha Nambiar <[email protected]>
Acked-by: John Fastabend <[email protected]>
Acked-by: Sridhar Samudrala <[email protected]>
Signed-off-by: Jeff Kirsher <[email protected]>

Author: anambiarin

drivers/net/ethernet/intel/ixgbe/ixgbe_main.c

@@ -8257,19 +8257,20 @@ static int ixgbe_configure_clsu32(struct ixgbe_adapter *adapter,
 			return -EINVAL;
 
 		for (i = 0; nexthdr[i].jump; i++) {
-			if (nexthdr->o != cls->knode.sel->offoff ||
-			    nexthdr->s != cls->knode.sel->offshift ||
-			    nexthdr->m != cls->knode.sel->offmask ||
+			if (nexthdr[i].o != cls->knode.sel->offoff ||
+			    nexthdr[i].s != cls->knode.sel->offshift ||
+			    nexthdr[i].m != cls->knode.sel->offmask ||
 			    /* do not support multiple key jumps its just mad */
 			    cls->knode.sel->nkeys > 1)
 				return -EINVAL;
 
-			if (nexthdr->off != cls->knode.sel->keys[0].off ||
-			    nexthdr->val != cls->knode.sel->keys[0].val ||
-			    nexthdr->mask != cls->knode.sel->keys[0].mask)
-				return -EINVAL;
-
-			adapter->jump_tables[link_uhtid] = nexthdr->jump;
+			if (nexthdr[i].off == cls->knode.sel->keys[0].off &&
+			    nexthdr[i].val == cls->knode.sel->keys[0].val &&
+			    nexthdr[i].mask == cls->knode.sel->keys[0].mask) {
+				adapter->jump_tables[link_uhtid] =
+								nexthdr[i].jump;
+				break;
+			}
 		}
 		return 0;
 	}

drivers/net/ethernet/intel/ixgbe/ixgbe_model.h

@@ -82,6 +82,12 @@ static struct ixgbe_mat_field ixgbe_tcp_fields[] = {
 	{ .val = NULL } /* terminal node */
 };
 
+static struct ixgbe_mat_field ixgbe_udp_fields[] = {
+	{.off = 0, .val = ixgbe_mat_prgm_ports,
+	 .type = IXGBE_ATR_FLOW_TYPE_UDPV4},
+	{ .val = NULL } /* terminal node */
+};
+
 struct ixgbe_nexthdr {
 	/* offset, shift, and mask of position to next header */
 	unsigned int o;
@@ -98,6 +104,8 @@ struct ixgbe_nexthdr {
 static struct ixgbe_nexthdr ixgbe_ipv4_jumps[] = {
 	{ .o = 0, .s = 6, .m = 0xf,
 	  .off = 8, .val = 0x600, .mask = 0xff00, .jump = ixgbe_tcp_fields},
+	{ .o = 0, .s = 6, .m = 0xf,
+	  .off = 8, .val = 0x1100, .mask = 0xff00, .jump = ixgbe_udp_fields},
 	{ .jump = NULL } /* terminal node */
 };
 #endif /* _IXGBE_MODEL_H_ */