From 5917bd1cf9857979a7cae89f362d2c885f09d034 Mon Sep 17 00:00:00 2001
From: Damjan Marion <damarion@cisco.com>
Date: Thu, 14 Jul 2016 09:59:02 -0700
Subject: [PATCH 2/2] i40e: Enable bad checksum flags in i40e vPMD

Decode the checksum flags from the rx descriptor, setting
the appropriate bit in the mbuf ol_flags field when the flag
indicates a bad checksum.

Signed-off-by: Damjan Marion <damarion@cisco.com>
Signed-off-by: Jeff Shaw <jeffrey.b.shaw@intel.com>
---
 drivers/net/i40e/i40e_rxtx_vec.c | 48 +++++++++++++++++++++++-----------------
 1 file changed, 28 insertions(+), 20 deletions(-)

diff --git a/drivers/net/i40e/i40e_rxtx_vec.c b/drivers/net/i40e/i40e_rxtx_vec.c
index e78ac63..ace51df 100644
--- a/drivers/net/i40e/i40e_rxtx_vec.c
+++ b/drivers/net/i40e/i40e_rxtx_vec.c
@@ -138,19 +138,14 @@ i40e_rxq_rearm(struct i40e_rx_queue *rxq)
 static inline void
 desc_to_olflags_v(__m128i descs[4], struct rte_mbuf **rx_pkts)
 {
-	__m128i vlan0, vlan1, rss;
-	union {
-		uint16_t e[4];
-		uint64_t dword;
-	} vol;
+	__m128i vlan0, vlan1, rss, l3_l4e;
 
 	/* 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,
-			0x3804, 0x3804, 0x3804, 0x3804);
+	const __m128i rss_vlan_msk = _mm_set_epi32(
+			0x1c03004, 0x1c03004, 0x1c03004, 0x1c03004);
 
 	/* map rss and vlan type to rss hash and vlan flag */
 	const __m128i vlan_flags = _mm_set_epi8(0, 0, 0, 0,
@@ -163,23 +158,36 @@ desc_to_olflags_v(__m128i descs[4], struct rte_mbuf **rx_pkts)
 			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]);
-	vlan0 = _mm_unpacklo_epi32(vlan0, vlan1);
+	const __m128i l3_l4e_flags = _mm_set_epi8(0, 0, 0, 0, 0, 0, 0, 0,
+			PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD,
+			PKT_RX_EIP_CKSUM_BAD | PKT_RX_L4_CKSUM_BAD,
+			PKT_RX_EIP_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD,
+			PKT_RX_EIP_CKSUM_BAD,
+			PKT_RX_L4_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD,
+			PKT_RX_L4_CKSUM_BAD,
+			PKT_RX_IP_CKSUM_BAD,
+			0);
+
+	vlan0 = _mm_unpackhi_epi32(descs[0], descs[1]);
+	vlan1 = _mm_unpackhi_epi32(descs[2], descs[3]);
+	vlan0 = _mm_unpacklo_epi64(vlan0, vlan1);
 
 	vlan1 = _mm_and_si128(vlan0, rss_vlan_msk);
 	vlan0 = _mm_shuffle_epi8(vlan_flags, vlan1);
 
-	rss = _mm_srli_epi16(vlan1, 11);
+	rss = _mm_srli_epi32(vlan1, 12);
 	rss = _mm_shuffle_epi8(rss_flags, rss);
 
+	l3_l4e = _mm_srli_epi32(vlan1, 22);
+	l3_l4e = _mm_shuffle_epi8(l3_l4e_flags, l3_l4e);
+
 	vlan0 = _mm_or_si128(vlan0, rss);
-	vol.dword = _mm_cvtsi128_si64(vlan0);
+	vlan0 = _mm_or_si128(vlan0, l3_l4e);
 
-	rx_pkts[0]->ol_flags = vol.e[0];
-	rx_pkts[1]->ol_flags = vol.e[1];
-	rx_pkts[2]->ol_flags = vol.e[2];
-	rx_pkts[3]->ol_flags = vol.e[3];
+	rx_pkts[0]->ol_flags = _mm_extract_epi16(vlan0, 0);
+	rx_pkts[1]->ol_flags = _mm_extract_epi16(vlan0, 2);
+	rx_pkts[2]->ol_flags = _mm_extract_epi16(vlan0, 4);
+	rx_pkts[3]->ol_flags = _mm_extract_epi16(vlan0, 6);
 }
 #else
 #define desc_to_olflags_v(desc, rx_pkts) do {} while (0)
@@ -754,7 +762,8 @@ i40e_rx_vec_dev_conf_condition_check(struct rte_eth_dev *dev)
 #ifndef RTE_LIBRTE_I40E_RX_OLFLAGS_ENABLE
 	/* whithout rx ol_flags, no VP flag report */
 	if (rxmode->hw_vlan_strip != 0 ||
-	    rxmode->hw_vlan_extend != 0)
+	    rxmode->hw_vlan_extend != 0 ||
+	    rxmode->hw_ip_checksum != 0)
 		return -1;
 #endif
 
@@ -765,8 +774,7 @@ i40e_rx_vec_dev_conf_condition_check(struct rte_eth_dev *dev)
 	 /* - no csum error report support
 	 * - no header split support
 	 */
-	if (rxmode->hw_ip_checksum == 1 ||
-	    rxmode->header_split == 1)
+	if (rxmode->header_split == 1)
 		return -1;
 
 	return 0;
-- 
2.7.4