[dpdk-dev] [PATCH 09/16] net/ice/base: improve GTPU extend header handle

[Qi Zhang <qi.z.zhang@intel.com>]

A GTPU header can stack with a extend header or not, while
current implementation does not allow HDR bit sets like below:

ICE_FLOW_SEG_HDR_GTPU_IP | ICE_FLOW_SEG_HDR_GTPU_EH
ICE_FLOW_SEG_HDR_GTPU_IP | ICE_FLOW_SEG_HDR_GTPU_UP
ICE_FLOW_SEG_HDR_GTPU_IP | ICE_FLOW_SEG_HDR_GTPU_DWN

Which is not convenient for upper layer flow parser to
generate correct HDR bit.

but it could be if we have below assumptions:

ICE_FLOW_SEG_HDR_GTPU_DWN -- for GTPU with extend header down link
ICE_FLOW_SEG_HDR_GTPU_UP  -- for GTPU with extend header up link
ICE_FLOW_SEG_HDR_GTPU_EH  -- for GTPU with any extend header
ICE_FLOW_SEG_HDR_GTPU_IP  -- for any GTPU header, but when it combined
                             with any above it downgrade to a dummy one.

And handle from specific case to generic case will hit all the cases
as expected.

if else (hdr & ICE_FLOW_SEG_HDR_GTPU_DWN) {
...
} else if (hdr & ICE_FLOW_SEG_HDR_GTPU_UP) {
...
} else if (hdr & ICE_FLOW_SEG_HDR_GTPU_EH) {
...
} else if (hdr & ICE_FLOW_SEG_HDR_GTPU_IP {
...
}

Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
Signed-off-by: Paul M Stillwell Jr <paul.m.stillwell.jr@intel.com>
---
 drivers/net/ice/base/ice_flow.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/ice/base/ice_flow.c b/drivers/net/ice/base/ice_flow.c
index e523b8f45..466fa83d6 100644
--- a/drivers/net/ice/base/ice_flow.c
+++ b/drivers/net/ice/base/ice_flow.c
@@ -656,8 +656,7 @@ ice_flow_proc_seg_hdrs(struct ice_flow_prof_params *params)
 			/* Attributes for GTP packet with Extension Header */
 			params->attr = ice_attr_gtpu_eh;
 			params->attr_cnt = ARRAY_SIZE(ice_attr_gtpu_eh);
-		} else if ((hdrs & ICE_FLOW_SEG_HDR_GTPU) ==
-			   ICE_FLOW_SEG_HDR_GTPU) {
+		} else if (hdrs & ICE_FLOW_SEG_HDR_GTPU_IP) {
 			src = (const ice_bitmap_t *)ice_ptypes_gtpu;
 			ice_and_bitmap(params->ptypes, params->ptypes,
 				       src, ICE_FLOW_PTYPE_MAX);
-- 
2.13.6