[dpdk-dev] [PATCH v4 20/62] net/cnxk: add Rx multi-segmented version for cn9k

[Nithin Dabilpuram <ndabilpuram@marvell.com>]

Add Rx burst multi-segmented version for CN9K.

Signed-off-by: Nithin Dabilpuram <ndabilpuram@marvell.com>
Signed-off-by: Pavan Nikhilesh <pbhagavatula@marvell.com>
---
 drivers/net/cnxk/cn9k_rx.c      | 17 ++++++++++++
 drivers/net/cnxk/cn9k_rx.h      | 60 ++++++++++++++++++++++++++++++++++++++---
 drivers/net/cnxk/cn9k_rx_mseg.c | 17 ++++++++++++
 drivers/net/cnxk/cnxk_ethdev.h  |  3 +++
 drivers/net/cnxk/meson.build    |  3 ++-
 5 files changed, 96 insertions(+), 4 deletions(-)
 create mode 100644 drivers/net/cnxk/cn9k_rx_mseg.c

diff --git a/drivers/net/cnxk/cn9k_rx.c b/drivers/net/cnxk/cn9k_rx.c
index a4297f9..87a62c9 100644
--- a/drivers/net/cnxk/cn9k_rx.c
+++ b/drivers/net/cnxk/cn9k_rx.c
@@ -32,6 +32,8 @@ pick_rx_func(struct rte_eth_dev *eth_dev,
 void
 cn9k_eth_set_rx_function(struct rte_eth_dev *eth_dev)
 {
+	struct cnxk_eth_dev *dev = cnxk_eth_pmd_priv(eth_dev);
+
 	const eth_rx_burst_t nix_eth_rx_burst[2][2][2][2] = {
 #define R(name, f3, f2, f1, f0, flags)					\
 	[f3][f2][f1][f0] = cn9k_nix_recv_pkts_##name,
@@ -40,7 +42,22 @@ cn9k_eth_set_rx_function(struct rte_eth_dev *eth_dev)
 #undef R
 	};
 
+	const eth_rx_burst_t nix_eth_rx_burst_mseg[2][2][2][2] = {
+#define R(name, f3, f2, f1, f0, flags)					\
+	[f3][f2][f1][f0] = cn9k_nix_recv_pkts_mseg_##name,
+
+		NIX_RX_FASTPATH_MODES
+#undef R
+	};
+
 	pick_rx_func(eth_dev, nix_eth_rx_burst);
 
+	if (dev->rx_offloads & DEV_RX_OFFLOAD_SCATTER)
+		pick_rx_func(eth_dev, nix_eth_rx_burst_mseg);
+
+	/* Copy multi seg version with no offload for tear down sequence */
+	if (rte_eal_process_type() == RTE_PROC_PRIMARY)
+		dev->rx_pkt_burst_no_offload =
+			nix_eth_rx_burst_mseg[0][0][0][0];
 	rte_mb();
 }
diff --git a/drivers/net/cnxk/cn9k_rx.h b/drivers/net/cnxk/cn9k_rx.h
index 92f3c7c..49f80ce 100644
--- a/drivers/net/cnxk/cn9k_rx.h
+++ b/drivers/net/cnxk/cn9k_rx.h
@@ -104,6 +104,53 @@ nix_update_match_id(const uint16_t match_id, uint64_t ol_flags,
 }
 
 static __rte_always_inline void
+nix_cqe_xtract_mseg(const union nix_rx_parse_u *rx, struct rte_mbuf *mbuf,
+		    uint64_t rearm)
+{
+	const rte_iova_t *iova_list;
+	struct rte_mbuf *head;
+	const rte_iova_t *eol;
+	uint8_t nb_segs;
+	uint64_t sg;
+
+	sg = *(const uint64_t *)(rx + 1);
+	nb_segs = (sg >> 48) & 0x3;
+	mbuf->nb_segs = nb_segs;
+	mbuf->data_len = sg & 0xFFFF;
+	sg = sg >> 16;
+
+	eol = ((const rte_iova_t *)(rx + 1) +
+	       ((rx->cn9k.desc_sizem1 + 1) << 1));
+	/* Skip SG_S and first IOVA*/
+	iova_list = ((const rte_iova_t *)(rx + 1)) + 2;
+	nb_segs--;
+
+	rearm = rearm & ~0xFFFF;
+
+	head = mbuf;
+	while (nb_segs) {
+		mbuf->next = ((struct rte_mbuf *)*iova_list) - 1;
+		mbuf = mbuf->next;
+
+		__mempool_check_cookies(mbuf->pool, (void **)&mbuf, 1, 1);
+
+		mbuf->data_len = sg & 0xFFFF;
+		sg = sg >> 16;
+		*(uint64_t *)(&mbuf->rearm_data) = rearm;
+		nb_segs--;
+		iova_list++;
+
+		if (!nb_segs && (iova_list + 1 < eol)) {
+			sg = *(const uint64_t *)(iova_list);
+			nb_segs = (sg >> 48) & 0x3;
+			head->nb_segs += nb_segs;
+			iova_list = (const rte_iova_t *)(iova_list + 1);
+		}
+	}
+	mbuf->next = NULL;
+}
+
+static __rte_always_inline void
 cn9k_nix_cqe_to_mbuf(const struct nix_cqe_hdr_s *cq, const uint32_t tag,
 		     struct rte_mbuf *mbuf, const void *lookup_mem,
 		     const uint64_t val, const uint16_t flag)
@@ -138,8 +185,12 @@ cn9k_nix_cqe_to_mbuf(const struct nix_cqe_hdr_s *cq, const uint32_t tag,
 	*(uint64_t *)(&mbuf->rearm_data) = val;
 	mbuf->pkt_len = len;
 
-	mbuf->data_len = len;
-	mbuf->next = NULL;
+	if (flag & NIX_RX_MULTI_SEG_F) {
+		nix_cqe_xtract_mseg(rx, mbuf, val);
+	} else {
+		mbuf->data_len = len;
+		mbuf->next = NULL;
+	}
 }
 
 static inline uint16_t
@@ -239,8 +290,11 @@ R(mark_cksum_rss,		1, 1, 0, 1, MARK_F | CKSUM_F | RSS_F)  \
 R(mark_cksum_ptype,		1, 1, 1, 0, MARK_F | CKSUM_F | PTYPE_F)\
 R(mark_cksum_ptype_rss,		1, 1, 1, 1, MARK_F | CKSUM_F | PTYPE_F | RSS_F)
 
-#define R(name, f3, f2, f1, f0, flags)					       \
+#define R(name, f3, f2, f1, f0, flags)                                         \
 	uint16_t __rte_noinline __rte_hot cn9k_nix_recv_pkts_##name(           \
+		void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t pkts);     \
+									       \
+	uint16_t __rte_noinline __rte_hot cn9k_nix_recv_pkts_mseg_##name(      \
 		void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t pkts);
 
 NIX_RX_FASTPATH_MODES
diff --git a/drivers/net/cnxk/cn9k_rx_mseg.c b/drivers/net/cnxk/cn9k_rx_mseg.c
new file mode 100644
index 0000000..6ad8c1d
--- /dev/null
+++ b/drivers/net/cnxk/cn9k_rx_mseg.c
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(C) 2021 Marvell.
+ */
+
+#include "cn9k_ethdev.h"
+#include "cn9k_rx.h"
+
+#define R(name, f3, f2, f1, f0, flags)                                         \
+	uint16_t __rte_noinline __rte_hot cn9k_nix_recv_pkts_mseg_##name(      \
+		void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t pkts)      \
+	{                                                                      \
+		return cn9k_nix_recv_pkts(rx_queue, rx_pkts, pkts,             \
+					  (flags) | NIX_RX_MULTI_SEG_F);       \
+	}
+
+NIX_RX_FASTPATH_MODES
+#undef R
diff --git a/drivers/net/cnxk/cnxk_ethdev.h b/drivers/net/cnxk/cnxk_ethdev.h
index a6f5d36..333a54c 100644
--- a/drivers/net/cnxk/cnxk_ethdev.h
+++ b/drivers/net/cnxk/cnxk_ethdev.h
@@ -163,6 +163,9 @@ struct cnxk_eth_dev {
 	struct cnxk_eth_qconf *tx_qconf;
 	struct cnxk_eth_qconf *rx_qconf;
 
+	/* Rx burst for cleanup(Only Primary) */
+	eth_rx_burst_t rx_pkt_burst_no_offload;
+
 	/* Default mac address */
 	uint8_t mac_addr[RTE_ETHER_ADDR_LEN];
 
diff --git a/drivers/net/cnxk/meson.build b/drivers/net/cnxk/meson.build
index 7a44001..5bfab21 100644
--- a/drivers/net/cnxk/meson.build
+++ b/drivers/net/cnxk/meson.build
@@ -16,7 +16,8 @@ sources = files('cnxk_ethdev.c',
 
 # CN9K
 sources += files('cn9k_ethdev.c',
-		 'cn9k_rx.c')
+		 'cn9k_rx.c',
+		 'cn9k_rx_mseg.c')
 # CN10K
 sources += files('cn10k_ethdev.c')
 
-- 
2.8.4