[dpdk-dev] [PATCH v3] i40e: fix olflags for vector Rx

[Zhe Tao <zhe.tao@intel.com>]

Problem:
The flag for RSS and flow director is not set correctly in the
vector Rx function, so the upper layer APP which base on the related
flags will not work correctly.

Fix this problem by change the shuffle table. the original shuffle
table is not correct.

Fixes: 9ed94e5bb04e ("i40e: add vector Rx")

Signed-off-by: Zhe Tao <zhe.tao@intel.com>
---
v2: Changed the comments according to the code change.
v3: Fixed the issues reported by check-git-log.sh.

 drivers/net/i40e/i40e_rxtx_vec.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/net/i40e/i40e_rxtx_vec.c b/drivers/net/i40e/i40e_rxtx_vec.c
index eef80d9..704924f 100644
--- a/drivers/net/i40e/i40e_rxtx_vec.c
+++ b/drivers/net/i40e/i40e_rxtx_vec.c
@@ -144,12 +144,13 @@ desc_to_olflags_v(__m128i descs[4], struct rte_mbuf **rx_pkts)
 		uint64_t dword;
 	} vol;
 
-	/* mask everything except rss and vlan flags
-	*bit2 is for vlan tag, bits 13:12 for rss
-	*/
+	/* mask everything except RSS, flow director and VLAN flags
+	 * bit2 is for VLAN tag, bit11 for flow director indication
+	 * bit13:12 for RSS indication.
+	 */
 	const __m128i rss_vlan_msk = _mm_set_epi16(
 			0x0000, 0x0000, 0x0000, 0x0000,
-			0x3004, 0x3004, 0x3004, 0x3004);
+			0x3804, 0x3804, 0x3804, 0x3804);
 
 	/* map rss and vlan type to rss hash and vlan flag */
 	const __m128i vlan_flags = _mm_set_epi8(0, 0, 0, 0,
@@ -159,8 +160,8 @@ desc_to_olflags_v(__m128i descs[4], struct rte_mbuf **rx_pkts)
 
 	const __m128i rss_flags = _mm_set_epi8(0, 0, 0, 0,
 			0, 0, 0, 0,
-			0, 0, 0, 0,
-			PKT_RX_FDIR, 0, PKT_RX_RSS_HASH, 0);
+			PKT_RX_RSS_HASH | PKT_RX_FDIR, PKT_RX_RSS_HASH, 0, 0,
+			0, 0, PKT_RX_FDIR, 0);
 
 	vlan0 = _mm_unpackhi_epi16(descs[0], descs[1]);
 	vlan1 = _mm_unpackhi_epi16(descs[2], descs[3]);
@@ -169,7 +170,7 @@ desc_to_olflags_v(__m128i descs[4], struct rte_mbuf **rx_pkts)
 	vlan1 = _mm_and_si128(vlan0, rss_vlan_msk);
 	vlan0 = _mm_shuffle_epi8(vlan_flags, vlan1);
 
-	rss = _mm_srli_epi16(vlan1, 12);
+	rss = _mm_srli_epi16(vlan1, 11);
 	rss = _mm_shuffle_epi8(rss_flags, rss);
 
 	vlan0 = _mm_or_si128(vlan0, rss);
-- 
2.1.4