[PATCH v2 4/5] net/ixgbe: implement new Rx checksum flag

[Xiao Wang <xiao.w.wang@intel.com>]

Add CKSUM_GOOD flag to distinguish a good checksum from an unknown one.

Signed-off-by: Xiao Wang <xiao.w.wang@intel.com>
---
 drivers/net/ixgbe/ixgbe_rxtx.c         |  4 +++-
 drivers/net/ixgbe/ixgbe_rxtx_vec_sse.c | 30 ++++++++++++++++++++++++------
 2 files changed, 27 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ixgbe/ixgbe_rxtx.c b/drivers/net/ixgbe/ixgbe_rxtx.c
index 8a306b0..d2dc82a 100644
--- a/drivers/net/ixgbe/ixgbe_rxtx.c
+++ b/drivers/net/ixgbe/ixgbe_rxtx.c
@@ -1345,7 +1345,9 @@ rx_desc_error_to_pkt_flags(uint32_t rx_status)
 	 * Bit 30: L4I, L4I integrity error
 	 */
 	static uint64_t error_to_pkt_flags_map[4] = {
-		0,  PKT_RX_L4_CKSUM_BAD, PKT_RX_IP_CKSUM_BAD,
+		PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_GOOD,
+		PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_BAD,
+		PKT_RX_IP_CKSUM_BAD | PKT_RX_L4_CKSUM_GOOD,
 		PKT_RX_IP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD
 	};
 	pkt_flags = error_to_pkt_flags_map[(rx_status >>
diff --git a/drivers/net/ixgbe/ixgbe_rxtx_vec_sse.c b/drivers/net/ixgbe/ixgbe_rxtx_vec_sse.c
index dc5657e..7929593 100644
--- a/drivers/net/ixgbe/ixgbe_rxtx_vec_sse.c
+++ b/drivers/net/ixgbe/ixgbe_rxtx_vec_sse.c
@@ -156,6 +156,11 @@ desc_to_olflags_v(__m128i descs[4], uint8_t vlan_flags,
 			0x0000, 0x0000, 0x0000, 0x0000,
 			0x000F, 0x000F, 0x000F, 0x000F);
 
+	/* mask the lower byte of ol_flags */
+	const __m128i ol_flags_msk = _mm_set_epi16(
+			0x0000, 0x0000, 0x0000, 0x0000,
+			0x00FF, 0x00FF, 0x00FF, 0x00FF);
+
 	/* map rss type to rss hash flag */
 	const __m128i rss_flags = _mm_set_epi8(PKT_RX_FDIR, 0, 0, 0,
 			0, 0, 0, PKT_RX_RSS_HASH,
@@ -171,17 +176,25 @@ desc_to_olflags_v(__m128i descs[4], uint8_t vlan_flags,
 		IXGBE_RXD_STAT_VP, IXGBE_RXD_STAT_VP,
 		IXGBE_RXD_STAT_VP, IXGBE_RXD_STAT_VP);
 	/* map vlan present (0x8), IPE (0x2), L4E (0x1) to ol_flags */
-	const __m128i vlan_csum_map = _mm_set_epi8(
+	const __m128i vlan_csum_map_lo = _mm_set_epi8(
 		0, 0, 0, 0,
 		vlan_flags | PKT_RX_IP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD,
 		vlan_flags | PKT_RX_IP_CKSUM_BAD,
-		vlan_flags | PKT_RX_L4_CKSUM_BAD,
-		vlan_flags,
+		vlan_flags | PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_BAD,
+		vlan_flags | PKT_RX_IP_CKSUM_GOOD,
 		0, 0, 0, 0,
 		PKT_RX_IP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD,
 		PKT_RX_IP_CKSUM_BAD,
-		PKT_RX_L4_CKSUM_BAD,
-		0);
+		PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_BAD,
+		PKT_RX_IP_CKSUM_GOOD);
+
+	const __m128i vlan_csum_map_hi = _mm_set_epi8(
+		0, 0, 0, 0,
+		0, PKT_RX_L4_CKSUM_GOOD >> sizeof(uint8_t), 0,
+		PKT_RX_L4_CKSUM_GOOD >> sizeof(uint8_t),
+		0, 0, 0, 0,
+		0, PKT_RX_L4_CKSUM_GOOD >> sizeof(uint8_t), 0,
+		PKT_RX_L4_CKSUM_GOOD >> sizeof(uint8_t));
 
 	ptype0 = _mm_unpacklo_epi16(descs[0], descs[1]);
 	ptype1 = _mm_unpacklo_epi16(descs[2], descs[3]);
@@ -207,7 +220,12 @@ desc_to_olflags_v(__m128i descs[4], uint8_t vlan_flags,
 	vtag1 = _mm_or_si128(csum, vtag1);
 
 	/* convert VP, IPE, L4E to ol_flags */
-	vtag1 = _mm_shuffle_epi8(vlan_csum_map, vtag1);
+	vtag0 = _mm_shuffle_epi8(vlan_csum_map_hi, vtag1);
+	vtag0 = _mm_slli_epi16(vtag0, sizeof(uint8_t));
+
+	vtag1 = _mm_shuffle_epi8(vlan_csum_map_lo, vtag1);
+	vtag1 = _mm_and_si128(vtag1, ol_flags_msk);
+	vtag1 = _mm_or_si128(vtag0, vtag1);
 
 	vtag1 = _mm_or_si128(ptype0, vtag1);
 	vol.dword = _mm_cvtsi128_si64(vtag1);
-- 
1.9.3