virtchnl: support raw packet in protocol header

The patch extends existing virtchnl_proto_hdrs structure to allow VF
to pass a pair of buffers as packet data and mask that describe
a match pattern of a filter rule. Then the kernel PF driver is requested
to parse the pair of buffer and figure out low level hardware metadata
(ptype, profile, field vector.. ) to program the expected FDIR or RSS
rules.

Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Marcin Szycik <marcin.szycik@linux.intel.com>
Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
Signed-off-by: Junfeng Guo <junfeng.guo@intel.com>
Signed-off-by: Ahmed Zaki <ahmed.zaki@intel.com>
Tested-by: Rafal Romanowski <rafal.romanowski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

diff --git a/include/linux/avf/virtchnl.h b/include/linux/avf/virtchnl.h
index 8e177b67e82f4ad31c863184368351dd65ff8fde..4f78a65e33dca370e2bc1515b896f386a40fc7ce 100644 (file)
--- a/include/linux/avf/virtchnl.h
+++ b/include/linux/avf/virtchnl.h
@@ -1121,6 +1121,7 @@ enum virtchnl_vfr_states {
 };
 
 #define VIRTCHNL_MAX_NUM_PROTO_HDRS    32
+#define VIRTCHNL_MAX_SIZE_RAW_PACKET   1024
 #define PROTO_HDR_SHIFT                        5
 #define PROTO_HDR_FIELD_START(proto_hdr_type) ((proto_hdr_type) << PROTO_HDR_SHIFT)
 #define PROTO_HDR_FIELD_MASK ((1UL << PROTO_HDR_SHIFT) - 1)
@@ -1266,13 +1267,22 @@ struct virtchnl_proto_hdrs {
        u8 pad[3];
        /**
         * specify where protocol header start from.
+        * must be 0 when sending a raw packet request.
         * 0 - from the outer layer
         * 1 - from the first inner layer
         * 2 - from the second inner layer
         * ....
         **/
        int count; /* the proto layers must < VIRTCHNL_MAX_NUM_PROTO_HDRS */
-       struct virtchnl_proto_hdr proto_hdr[VIRTCHNL_MAX_NUM_PROTO_HDRS];
+       union {
+               struct virtchnl_proto_hdr
+                       proto_hdr[VIRTCHNL_MAX_NUM_PROTO_HDRS];
+               struct {
+                       u16 pkt_len;
+                       u8 spec[VIRTCHNL_MAX_SIZE_RAW_PACKET];
+                       u8 mask[VIRTCHNL_MAX_SIZE_RAW_PACKET];
+               } raw;
+       };
 };
 
 VIRTCHNL_CHECK_STRUCT_LEN(2312, virtchnl_proto_hdrs);