[net-next 13/14] ixgbe: Extend cls_u32 offload to support UDP headers

[Jeff Kirsher]

From: Amritha Nambiar <amritha.namb...@intel.com>

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 <amritha.namb...@intel.com>
Acked-by: John Fastabend <john.r.fastab...@intel.com>
Acked-by: Sridhar Samudrala <sridhar.samudr...@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirs...@intel.com>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c  | 19 ++++++++++---------
 drivers/net/ethernet/intel/ixgbe/ixgbe_model.h |  8 ++++++++
 2 files changed, 18 insertions(+), 9 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c 
b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index d8b67d2..dcaac50 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/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;
        }
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_model.h 
b/drivers/net/ethernet/intel/ixgbe/ixgbe_model.h
index 74c53ad..60adde5 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_model.h
+++ b/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_ */
-- 
2.5.5