[dpdk-dev] [PATCH] ixgbe:enable configuration for old ptype behavior

Keith Wiles keith.wiles at intel.com
Sat Jun 25 17:30:00 CEST 2016
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The default behavior is to NOT support the old ptype behavior,
but enabling the configuration option the old ptype style
can be supported.

Add support for old behaviour until we have a cleaner solution using
a configuration option CONFIG_RTE_IXGBE_ENABLE_OLD_PTYPE_BEHAVIOUR,
which is defaulted to not set.

Signed-off-by: Keith Wiles <keith.wiles at intel.com>
---
 config/common_base                 |  2 ++
 drivers/net/ixgbe/ixgbe_ethdev.c   |  6 +++++
 drivers/net/ixgbe/ixgbe_rxtx_vec.c | 52 +++++++++++++++++++++++++++++++++++---
 3 files changed, 57 insertions(+), 3 deletions(-)

diff --git a/config/common_base b/config/common_base
index bdde2e7..05e69bc 100644
--- a/config/common_base
+++ b/config/common_base
@@ -160,6 +160,8 @@ CONFIG_RTE_LIBRTE_IXGBE_DEBUG_DRIVER=n
 CONFIG_RTE_LIBRTE_IXGBE_PF_DISABLE_STRIP_CRC=n
 CONFIG_RTE_IXGBE_INC_VECTOR=y
 CONFIG_RTE_IXGBE_RX_OLFLAGS_ENABLE=y
+# Enable to restore old ptype behavior
+CONFIG_RTE_IXGBE_ENABLE_OLD_PTYPE_BEHAVIOR=n
 
 #
 # Compile burst-oriented I40E PMD driver
diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index e11a431..068b92b 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -3076,7 +3076,13 @@ ixgbe_dev_supported_ptypes_get(struct rte_eth_dev *dev)
 	if (dev->rx_pkt_burst == ixgbe_recv_pkts ||
 	    dev->rx_pkt_burst == ixgbe_recv_pkts_lro_single_alloc ||
 	    dev->rx_pkt_burst == ixgbe_recv_pkts_lro_bulk_alloc ||
+#ifdef RTE_IXGBE_ENABLE_OLD_PTYPE_BEHAVIOR
+	    dev->rx_pkt_burst == ixgbe_recv_pkts_bulk_alloc ||
+	    dev->rx_pkt_burst == ixgbe_recv_pkts_vec ||
+	    dev->rx_pkt_burst == ixgbe_recv_scattered_pkts_vec)
+#else
 	    dev->rx_pkt_burst == ixgbe_recv_pkts_bulk_alloc)
+#endif
 		return ptypes;
 	return NULL;
 }
diff --git a/drivers/net/ixgbe/ixgbe_rxtx_vec.c b/drivers/net/ixgbe/ixgbe_rxtx_vec.c
index 12190d2..2e0d50b 100644
--- a/drivers/net/ixgbe/ixgbe_rxtx_vec.c
+++ b/drivers/net/ixgbe/ixgbe_rxtx_vec.c
@@ -228,6 +228,10 @@ _recv_raw_pkts_vec(struct ixgbe_rx_queue *rxq, struct rte_mbuf **rx_pkts,
 			);
 	__m128i dd_check, eop_check;
 	uint8_t vlan_flags;
+#ifdef RTE_IXGBE_ENABLE_OLD_PTYPE_BEHAVIOR
+	__m128i desc_mask = _mm_set_epi32(0xFFFFFFFF, 0xFFFFFFFF,
+					  0xFFFFFFFF, 0xFFFF07F0);
+#endif
 
 	/* nb_pkts shall be less equal than RTE_IXGBE_MAX_RX_BURST */
 	nb_pkts = RTE_MIN(nb_pkts, RTE_IXGBE_MAX_RX_BURST);
@@ -268,8 +272,14 @@ _recv_raw_pkts_vec(struct ixgbe_rx_queue *rxq, struct rte_mbuf **rx_pkts,
 		13, 12,      /* octet 12~13, 16 bits data_len */
 		0xFF, 0xFF,  /* skip high 16 bits pkt_len, zero out */
 		13, 12,      /* octet 12~13, low 16 bits pkt_len */
+#ifdef RTE_IXGBE_ENABLE_OLD_PTYPE_BEHAVIOR
+		0xFF, 0xFF,  /* skip high 16 bits pkt_type */
+		1,           /* octet 1, 8 bits pkt_type field */
+		0            /* octet 0, 4 bits offset 4 pkt_type field */
+#else
 		0xFF, 0xFF,  /* skip 32 bit pkt_type */
 		0xFF, 0xFF
+#endif
 		);
 
 	/* Cache is empty -> need to scan the buffer rings, but first move
@@ -291,6 +301,9 @@ _recv_raw_pkts_vec(struct ixgbe_rx_queue *rxq, struct rte_mbuf **rx_pkts,
 	for (pos = 0, nb_pkts_recd = 0; pos < nb_pkts;
 			pos += RTE_IXGBE_DESCS_PER_LOOP,
 			rxdp += RTE_IXGBE_DESCS_PER_LOOP) {
+#ifdef RTE_IXGBE_ENABLE_OLD_PTYPE_BEHAVIOR
+		__m128i descs0[RTE_IXGBE_DESCS_PER_LOOP];
+#endif
 		__m128i descs[RTE_IXGBE_DESCS_PER_LOOP];
 		__m128i pkt_mb1, pkt_mb2, pkt_mb3, pkt_mb4;
 		__m128i zero, staterr, sterr_tmp1, sterr_tmp2;
@@ -301,18 +314,30 @@ _recv_raw_pkts_vec(struct ixgbe_rx_queue *rxq, struct rte_mbuf **rx_pkts,
 
 		/* Read desc statuses backwards to avoid race condition */
 		/* A.1 load 4 pkts desc */
+#ifdef RTE_IXGBE_ENABLE_OLD_PTYPE_BEHAVIOR
+		descs0[3] = _mm_loadu_si128((__m128i *)(rxdp + 3));
+#else
 		descs[3] = _mm_loadu_si128((__m128i *)(rxdp + 3));
-
+#endif
 		/* B.2 copy 2 mbuf point into rx_pkts  */
 		_mm_storeu_si128((__m128i *)&rx_pkts[pos], mbp1);
 
 		/* B.1 load 1 mbuf point */
 		mbp2 = _mm_loadu_si128((__m128i *)&sw_ring[pos+2]);
 
+#ifdef RTE_IXGBE_ENABLE_OLD_PTYPE_BEHAVIOR
+		descs0[2] = _mm_loadu_si128((__m128i *)(rxdp + 2));
+
+		/* B.1 load 2 mbuf point */
+		descs0[1] = _mm_loadu_si128((__m128i *)(rxdp + 1));
+		descs0[0] = _mm_loadu_si128((__m128i *)(rxdp));
+#else
 		descs[2] = _mm_loadu_si128((__m128i *)(rxdp + 2));
+
 		/* B.1 load 2 mbuf point */
 		descs[1] = _mm_loadu_si128((__m128i *)(rxdp + 1));
 		descs[0] = _mm_loadu_si128((__m128i *)(rxdp));
+#endif
 
 		/* B.2 copy 2 mbuf point into rx_pkts  */
 		_mm_storeu_si128((__m128i *)&rx_pkts[pos+2], mbp2);
@@ -324,6 +349,16 @@ _recv_raw_pkts_vec(struct ixgbe_rx_queue *rxq, struct rte_mbuf **rx_pkts,
 			rte_mbuf_prefetch_part2(rx_pkts[pos + 3]);
 		}
 
+#ifdef RTE_IXGBE_ENABLE_OLD_PTYPE_BEHAVIOR
+		/* A* mask out 0~3 bits RSS type */
+		descs[3] = _mm_and_si128(descs0[3], desc_mask);
+		descs[2] = _mm_and_si128(descs0[2], desc_mask);
+
+		/* A* mask out 0~3 bits RSS type */
+		descs[1] = _mm_and_si128(descs0[1], desc_mask);
+		descs[0] = _mm_and_si128(descs0[0], desc_mask);
+#endif
+
 		/* avoid compiler reorder optimization */
 		rte_compiler_barrier();
 
@@ -331,22 +366,33 @@ _recv_raw_pkts_vec(struct ixgbe_rx_queue *rxq, struct rte_mbuf **rx_pkts,
 		pkt_mb4 = _mm_shuffle_epi8(descs[3], shuf_msk);
 		pkt_mb3 = _mm_shuffle_epi8(descs[2], shuf_msk);
 
+#ifdef RTE_IXGBE_ENABLE_OLD_PTYPE_BEHAVIOR
+#else
 		/* D.1 pkt 1,2 convert format from desc to pktmbuf */
 		pkt_mb2 = _mm_shuffle_epi8(descs[1], shuf_msk);
 		pkt_mb1 = _mm_shuffle_epi8(descs[0], shuf_msk);
-
+#endif
 		/* C.1 4=>2 filter staterr info only */
 		sterr_tmp2 = _mm_unpackhi_epi32(descs[3], descs[2]);
 		/* C.1 4=>2 filter staterr info only */
 		sterr_tmp1 = _mm_unpackhi_epi32(descs[1], descs[0]);
 
 		/* set ol_flags with vlan packet type */
+#ifdef RTE_IXGBE_ENABLE_OLD_PTYPE_BEHAVIOR
+		desc_to_olflags_v(descs0, vlan_flags, &rx_pkts[pos]);
+#else
 		desc_to_olflags_v(descs, vlan_flags, &rx_pkts[pos]);
-
+#endif
 		/* D.2 pkt 3,4 set in_port/nb_seg and remove crc */
 		pkt_mb4 = _mm_add_epi16(pkt_mb4, crc_adjust);
 		pkt_mb3 = _mm_add_epi16(pkt_mb3, crc_adjust);
 
+#ifdef RTE_IXGBE_ENABLE_OLD_PTYPE_BEHAVIOR
+		/* D.1 pkt 1,2 convert format from desc to pktmbuf */
+		pkt_mb2 = _mm_shuffle_epi8(descs[1], shuf_msk);
+		pkt_mb1 = _mm_shuffle_epi8(descs[0], shuf_msk);
+#endif
+
 		/* C.2 get 4 pkts staterr value  */
 		zero = _mm_xor_si128(dd_check, dd_check);
 		staterr = _mm_unpacklo_epi32(sterr_tmp1, sterr_tmp2);
-- 
2.1.4
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