[PATCH v2 2/5] net/fm10k: 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.
Since vector Rx supports checksum offload, this patch removes the
hw_ip_checksum check in fm10k_rx_vec_condition_check().

Signed-off-by: Xiao Wang <xiao.w.wang@intel.com>
---
 drivers/net/fm10k/fm10k_rxtx.c     |  4 ++++
 drivers/net/fm10k/fm10k_rxtx_vec.c | 24 +++++++++++++++++-------
 2 files changed, 21 insertions(+), 7 deletions(-)

diff --git a/drivers/net/fm10k/fm10k_rxtx.c b/drivers/net/fm10k/fm10k_rxtx.c
index bf5888b..32cc7ff 100644
--- a/drivers/net/fm10k/fm10k_rxtx.c
+++ b/drivers/net/fm10k/fm10k_rxtx.c
@@ -101,11 +101,15 @@ rx_desc_to_ol_flags(struct rte_mbuf *m, const union fm10k_rx_desc *d)
 		(FM10K_RXD_STATUS_IPCS | FM10K_RXD_STATUS_IPE)) ==
 		(FM10K_RXD_STATUS_IPCS | FM10K_RXD_STATUS_IPE)))
 		m->ol_flags |= PKT_RX_IP_CKSUM_BAD;
+	else
+		m->ol_flags |= PKT_RX_IP_CKSUM_GOOD;
 
 	if (unlikely((d->d.staterr &
 		(FM10K_RXD_STATUS_L4CS | FM10K_RXD_STATUS_L4E)) ==
 		(FM10K_RXD_STATUS_L4CS | FM10K_RXD_STATUS_L4E)))
 		m->ol_flags |= PKT_RX_L4_CKSUM_BAD;
+	else
+		m->ol_flags |= PKT_RX_L4_CKSUM_GOOD;
 }
 
 uint16_t
diff --git a/drivers/net/fm10k/fm10k_rxtx_vec.c b/drivers/net/fm10k/fm10k_rxtx_vec.c
index 9ea747e..5513f86 100644
--- a/drivers/net/fm10k/fm10k_rxtx_vec.c
+++ b/drivers/net/fm10k/fm10k_rxtx_vec.c
@@ -67,6 +67,8 @@ fm10k_reset_tx_queue(struct fm10k_tx_queue *txq);
 #define RXEFLAG_SHIFT     (13)
 /* IPE/L4E flag shift */
 #define L3L4EFLAG_SHIFT     (14)
+/* shift PKT_RX_L4_CKSUM_GOOD into one byte by 1 bit */
+#define CKSUM_SHIFT     (1)
 
 static inline void
 fm10k_desc_to_olflags_v(__m128i descs[4], struct rte_mbuf **rx_pkts)
@@ -92,11 +94,18 @@ fm10k_desc_to_olflags_v(__m128i descs[4], struct rte_mbuf **rx_pkts)
 			0x0000, 0x0000, 0x0000, 0x0000,
 			0x0001, 0x0001, 0x0001, 0x0001);
 
+	/* mask the lower byte of ol_flags */
+	const __m128i ol_flags_msk = _mm_set_epi16(
+			0x0000, 0x0000, 0x0000, 0x0000,
+			0x00FF, 0x00FF, 0x00FF, 0x00FF);
+
 	const __m128i l3l4cksum_flag = _mm_set_epi8(0, 0, 0, 0,
 			0, 0, 0, 0,
 			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_BAD | PKT_RX_L4_CKSUM_BAD) >> CKSUM_SHIFT,
+			(PKT_RX_IP_CKSUM_BAD | PKT_RX_L4_CKSUM_GOOD) >> CKSUM_SHIFT,
+			(PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_BAD) >> CKSUM_SHIFT,
+			(PKT_RX_IP_CKSUM_GOOD | PKT_RX_L4_CKSUM_GOOD) >> CKSUM_SHIFT);
 
 	const __m128i rxe_flag = _mm_set_epi8(0, 0, 0, 0,
 			0, 0, 0, 0,
@@ -139,6 +148,10 @@ fm10k_desc_to_olflags_v(__m128i descs[4], struct rte_mbuf **rx_pkts)
 	/* Process L4/L3 checksum error flags */
 	cksumflag = _mm_srli_epi16(cksumflag, L3L4EFLAG_SHIFT);
 	cksumflag = _mm_shuffle_epi8(l3l4cksum_flag, cksumflag);
+
+	/* clean the higher byte and shift back the flag bits */
+	cksumflag = _mm_and_si128(cksumflag, ol_flags_msk);
+	cksumflag = _mm_slli_epi16(cksumflag, CKSUM_SHIFT);
 	vtag1 = _mm_or_si128(cksumflag, vtag1);
 
 	vol.dword = _mm_cvtsi128_si64(vtag1);
@@ -234,11 +247,8 @@ fm10k_rx_vec_condition_check(struct rte_eth_dev *dev)
 	if (fconf->mode != RTE_FDIR_MODE_NONE)
 		return -1;
 
-	/* - no csum error report support
-	 * - no header split support
-	 */
-	if (rxmode->hw_ip_checksum == 1 ||
-	    rxmode->header_split == 1)
+	/* no header split support */
+	if (rxmode->header_split == 1)
 		return -1;
 
 	return 0;
-- 
1.9.3