[PATCH v2 1/3] common/iavf: support raw packet in protocol header

[Junfeng Guo <junfeng.guo@intel.com>]

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.

INTERNAL ONLY:

This is requirement from DPDK to support Protocol Agnostic Flow
Offloading(*1). Previously we have integrated the Parser Library(*2)
into DPDK and enabled a raw packet based FDIR and RSS support in DPDK
PF driver(*3,*4), to enable the same feature for AVF driver, we need
Virtual Channel to support raw packet filter rule passing.

[1] https://wiki.ith.intel.com/display/NPGCVL/Protocol+Agnostic+Flow+Offloading
[2] http://patchwork.dpdk.org/project/dpdk/list/?series=19057&archive=both&state=*
[3] http://patchwork.dpdk.org/project/dpdk/list/?series=20254&state=%2A&archive=both
[4] http://patchwork.dpdk.org/project/dpdk/list/?series=20291&state=%2A&archive=both

Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
Signed-off-by: Junfeng Guo <junfeng.guo@intel.com>
---
 drivers/common/iavf/virtchnl.h | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/drivers/common/iavf/virtchnl.h b/drivers/common/iavf/virtchnl.h
index 3e44eca7d8..3975229545 100644
--- a/drivers/common/iavf/virtchnl.h
+++ b/drivers/common/iavf/virtchnl.h
@@ -1482,6 +1482,7 @@ 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)
@@ -1676,14 +1677,25 @@ VIRTCHNL_CHECK_STRUCT_LEN(72, virtchnl_proto_hdr);
 struct virtchnl_proto_hdrs {
 	u8 tunnel_level;
 	/**
-	 * specify where protocol header start from.
+	 * 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];
+	 */
+	int count;
+	/**
+	 * number of proto layers, must < VIRTCHNL_MAX_NUM_PROTO_HDRS
+	 * must be 0 for a raw packet request.
+	 */
+	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);
-- 
2.25.1