[PATCH v8 11/17] net/r8169: implement Rx path

[Howard Wang <howard_wang@realsil.com.cn>]

Add implementation for RX datapath.

Signed-off-by: Howard Wang <howard_wang@realsil.com.cn>
---
 doc/guides/nics/features/r8169.ini |   3 +
 doc/guides/nics/r8169.rst          |   8 +
 drivers/net/r8169/r8169_compat.h   |  24 +
 drivers/net/r8169/r8169_ethdev.c   |  76 ++-
 drivers/net/r8169/r8169_ethdev.h   |  18 +
 drivers/net/r8169/r8169_rxtx.c     | 793 ++++++++++++++++++++++++++++-
 6 files changed, 917 insertions(+), 5 deletions(-)

diff --git a/doc/guides/nics/features/r8169.ini b/doc/guides/nics/features/r8169.ini
index ccb4cd9c23..89259de589 100644
--- a/doc/guides/nics/features/r8169.ini
+++ b/doc/guides/nics/features/r8169.ini
@@ -8,7 +8,10 @@ Speed capabilities   = Y
 Link speed configuration = Y
 Link status          = Y
 Link status event    = Y
+Scattered Rx         = Y
 Flow control         = Y
+L3 checksum offload  = Y
+L4 checksum offload  = Y
 Linux                = Y
 x86-32               = Y
 x86-64               = Y
diff --git a/doc/guides/nics/r8169.rst b/doc/guides/nics/r8169.rst
index 071aebcdbf..fe4594118b 100644
--- a/doc/guides/nics/r8169.rst
+++ b/doc/guides/nics/r8169.rst
@@ -17,3 +17,11 @@ Supported Chipsets and NICs
 
 - Realtek RTL8125 2.5 Gigabit Ethernet Controller
 - Realtek RTL8126 5 Gigabit Ethernet Controller
+
+Features
+--------
+
+Features of the R8169 PMD are:
+
+* Checksum offload
+* Jumbo frames supported
diff --git a/drivers/net/r8169/r8169_compat.h b/drivers/net/r8169/r8169_compat.h
index 7b2cd08651..3cb7eab3cb 100644
--- a/drivers/net/r8169/r8169_compat.h
+++ b/drivers/net/r8169/r8169_compat.h
@@ -550,6 +550,30 @@ enum RTL_chipset_name {
 
 #define MAC_ADDR_LEN    RTE_ETHER_ADDR_LEN
 
+#define RTL_MAX_TX_DESC 4096
+#define RTL_MAX_RX_DESC 4096
+#define RTL_MIN_TX_DESC 64
+#define RTL_MIN_RX_DESC 64
+
+#define RTL_RING_ALIGN 256
+
+#define RTL_MAX_TX_SEG 64
+#define RTL_DESC_ALIGN 64
+
+#define RTL_RX_FREE_THRESH 32
+#define RTL_TX_FREE_THRESH 32
+
+#define VLAN_TAG_SIZE   4
+
+/*
+ * The overhead from MTU to max frame size.
+ * Considering VLAN so a tag needs to be counted.
+ */
+#define RTL_ETH_OVERHEAD (RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN + VLAN_TAG_SIZE)
+#define JUMBO_FRAME_9K  (9 * 1024 - RTE_ETHER_HDR_LEN - RTE_VLAN_HLEN - RTE_ETHER_CRC_LEN)
+
+#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL << (n)) - 1))
+
 static inline u32
 rtl_read32(void *addr)
 {
diff --git a/drivers/net/r8169/r8169_ethdev.c b/drivers/net/r8169/r8169_ethdev.c
index a946fcec3c..72ebc57e60 100644
--- a/drivers/net/r8169/r8169_ethdev.c
+++ b/drivers/net/r8169/r8169_ethdev.c
@@ -33,6 +33,8 @@ static int rtl_dev_close(struct rte_eth_dev *dev);
 static int rtl_dev_link_update(struct rte_eth_dev *dev, int wait);
 static int rtl_dev_set_link_up(struct rte_eth_dev *dev);
 static int rtl_dev_set_link_down(struct rte_eth_dev *dev);
+static int rtl_dev_infos_get(struct rte_eth_dev *dev,
+			     struct rte_eth_dev_info *dev_info);
 
 /*
  * The set of PCI devices this driver supports
@@ -45,6 +47,20 @@ static const struct rte_pci_id pci_id_r8169_map[] = {
 	{.vendor_id = 0, /* sentinel */ },
 };
 
+static const struct rte_eth_desc_lim rx_desc_lim = {
+	.nb_max   = RTL_MAX_RX_DESC,
+	.nb_min   = RTL_MIN_RX_DESC,
+	.nb_align = RTL_DESC_ALIGN,
+};
+
+static const struct rte_eth_desc_lim tx_desc_lim = {
+	.nb_max         = RTL_MAX_TX_DESC,
+	.nb_min         = RTL_MIN_TX_DESC,
+	.nb_align       = RTL_DESC_ALIGN,
+	.nb_seg_max     = RTL_MAX_TX_SEG,
+	.nb_mtu_seg_max = RTL_MAX_TX_SEG,
+};
+
 static const struct eth_dev_ops rtl_eth_dev_ops = {
 	.dev_configure	      = rtl_dev_configure,
 	.dev_start	      = rtl_dev_start,
@@ -53,8 +69,13 @@ static const struct eth_dev_ops rtl_eth_dev_ops = {
 	.dev_reset	      = rtl_dev_reset,
 	.dev_set_link_up      = rtl_dev_set_link_up,
 	.dev_set_link_down    = rtl_dev_set_link_down,
+	.dev_infos_get        = rtl_dev_infos_get,
 
 	.link_update          = rtl_dev_link_update,
+
+	.rx_queue_setup       = rtl_rx_queue_setup,
+	.rx_queue_release     = rtl_rx_queue_release,
+	.rxq_info_get         = rtl_rxq_info_get,
 };
 
 static int
@@ -143,6 +164,7 @@ _rtl_setup_link(struct rte_eth_dev *dev)
 error_invalid_config:
 	PMD_INIT_LOG(ERR, "Invalid advertised speeds (%u) for port %u",
 		     dev->data->dev_conf.link_speeds, dev->data->port_id);
+	rtl_stop_queues(dev);
 	return -EINVAL;
 }
 
@@ -221,6 +243,7 @@ rtl_dev_start(struct rte_eth_dev *dev)
 
 	return 0;
 error:
+	rtl_stop_queues(dev);
 	return -EIO;
 }
 
@@ -247,6 +270,8 @@ rtl_dev_stop(struct rte_eth_dev *dev)
 
 	rtl_powerdown_pll(hw);
 
+	rtl_stop_queues(dev);
+
 	/* Clear the recorded link status */
 	memset(&link, 0, sizeof(link));
 	rte_eth_linkstatus_set(dev, &link);
@@ -284,6 +309,50 @@ rtl_dev_set_link_down(struct rte_eth_dev *dev)
 	return 0;
 }
 
+static int
+rtl_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
+{
+	struct rtl_adapter *adapter = RTL_DEV_PRIVATE(dev);
+	struct rtl_hw *hw = &adapter->hw;
+
+	dev_info->min_rx_bufsize = 1024;
+	dev_info->max_rx_pktlen = JUMBO_FRAME_9K;
+	dev_info->max_mac_addrs = 1;
+
+	dev_info->max_rx_queues = 1;
+	dev_info->max_tx_queues = 1;
+
+	dev_info->default_rxconf = (struct rte_eth_rxconf) {
+		.rx_free_thresh = RTL_RX_FREE_THRESH,
+	};
+
+	dev_info->default_txconf = (struct rte_eth_txconf) {
+		.tx_free_thresh = RTL_TX_FREE_THRESH,
+	};
+
+	dev_info->rx_desc_lim = rx_desc_lim;
+	dev_info->tx_desc_lim = tx_desc_lim;
+
+	dev_info->speed_capa = RTE_ETH_LINK_SPEED_10M_HD | RTE_ETH_LINK_SPEED_10M |
+			       RTE_ETH_LINK_SPEED_100M_HD | RTE_ETH_LINK_SPEED_100M |
+			       RTE_ETH_LINK_SPEED_1G;
+
+	switch (hw->chipset_name) {
+	case RTL8126A:
+		dev_info->speed_capa |= RTE_ETH_LINK_SPEED_5G;
+	/* fallthrough */
+	case RTL8125A:
+	case RTL8125B:
+		dev_info->speed_capa |= RTE_ETH_LINK_SPEED_2_5G;
+		break;
+	}
+
+	dev_info->rx_offload_capa = (rtl_get_rx_port_offloads() |
+				     dev_info->rx_queue_offload_capa);
+
+	return 0;
+}
+
 /* Return 0 means link status changed, -1 means not changed */
 static int
 rtl_dev_link_update(struct rte_eth_dev *dev, int wait __rte_unused)
@@ -384,6 +453,8 @@ rtl_dev_close(struct rte_eth_dev *dev)
 
 	ret_stp = rtl_dev_stop(dev);
 
+	rtl_free_queues(dev);
+
 	/* Reprogram the RAR[0] in case user changed it. */
 	rtl_rar_set(hw, hw->mac_addr);
 
@@ -419,8 +490,11 @@ rtl_dev_init(struct rte_eth_dev *dev)
 	dev->rx_pkt_burst = &rtl_recv_pkts;
 
 	/* For secondary processes, the primary process has done all the work */
-	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY) {
+		if (dev->data->scattered_rx)
+			dev->rx_pkt_burst = &rtl_recv_scattered_pkts;
 		return 0;
+	}
 
 	hw->mmio_addr = (u8 *)pci_dev->mem_resource[2].addr; /* RTL8169 uses BAR2 */
 
diff --git a/drivers/net/r8169/r8169_ethdev.h b/drivers/net/r8169/r8169_ethdev.h
index 3434a5a1b3..9be16eff69 100644
--- a/drivers/net/r8169/r8169_ethdev.h
+++ b/drivers/net/r8169/r8169_ethdev.h
@@ -43,6 +43,7 @@ struct rtl_hw {
 	u8  HwSuppIntMitiVer;
 	u16 cur_page;
 	u8  mac_addr[MAC_ADDR_LEN];
+	u32 rx_buf_sz;
 
 	u8  RequirePhyMdiSwapPatch;
 	u8  NotWrMcuPatchCode;
@@ -107,5 +108,22 @@ int rtl_tx_init(struct rte_eth_dev *dev);
 
 uint16_t rtl_xmit_pkts(void *txq, struct rte_mbuf **tx_pkts, uint16_t nb_pkts);
 uint16_t rtl_recv_pkts(void *rxq, struct rte_mbuf **rx_pkts, uint16_t nb_pkts);
+uint16_t rtl_recv_scattered_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
+				 uint16_t nb_pkts);
+
+void rtl_rx_queue_release(struct rte_eth_dev *dev, uint16_t rx_queue_id);
+
+void rtl_rxq_info_get(struct rte_eth_dev *dev, uint16_t queue_id,
+		      struct rte_eth_rxq_info *qinfo);
+
+uint64_t rtl_get_rx_port_offloads(void);
+
+int rtl_rx_queue_setup(struct rte_eth_dev *dev, uint16_t queue_idx,
+		       uint16_t nb_rx_desc, unsigned int socket_id,
+		       const struct rte_eth_rxconf *rx_conf,
+		       struct rte_mempool *mb_pool);
+
+int rtl_stop_queues(struct rte_eth_dev *dev);
+void rtl_free_queues(struct rte_eth_dev *dev);
 
 #endif
diff --git a/drivers/net/r8169/r8169_rxtx.c b/drivers/net/r8169/r8169_rxtx.c
index 23d36d2231..2381f4ff99 100644
--- a/drivers/net/r8169/r8169_rxtx.c
+++ b/drivers/net/r8169/r8169_rxtx.c
@@ -3,33 +3,791 @@
  */
 
 #include <stdio.h>
+#include <errno.h>
 #include <stdint.h>
 
 #include <rte_eal.h>
 
 #include <rte_common.h>
+#include <rte_interrupts.h>
+#include <rte_byteorder.h>
+#include <rte_debug.h>
 #include <rte_pci.h>
 #include <bus_pci_driver.h>
+#include <rte_ether.h>
 #include <ethdev_driver.h>
 #include <ethdev_pci.h>
+#include <rte_memory.h>
+#include <rte_malloc.h>
 #include <dev_driver.h>
 
 #include "r8169_ethdev.h"
+#include "r8169_hw.h"
+#include "r8169_logs.h"
 
+/* Struct RxDesc in kernel r8169 */
+struct rtl_rx_desc {
+	u32 opts1;
+	u32 opts2;
+	u64 addr;
+};
+
+/* Structure associated with each descriptor of the RX ring of a RX queue. */
+struct rtl_rx_entry {
+	struct rte_mbuf *mbuf;
+};
+
+/* Structure associated with each RX queue. */
+struct rtl_rx_queue {
+	struct rte_mempool   *mb_pool;
+	struct rtl_rx_desc   *hw_ring;
+	struct rtl_rx_entry  *sw_ring;
+	struct rte_mbuf      *pkt_first_seg; /* First segment of current packet. */
+	struct rte_mbuf      *pkt_last_seg;  /* Last segment of current packet. */
+	struct rtl_hw        *hw;
+	uint64_t	     hw_ring_phys_addr;
+	uint64_t	     offloads;
+	uint16_t	     nb_rx_desc;
+	uint16_t	     rx_tail;
+	uint16_t	     nb_rx_hold;
+	uint16_t	     queue_id;
+	uint16_t	     port_id;
+	uint16_t	     rx_free_thresh;
+};
+
+enum _DescStatusBit {
+	DescOwn     = (1 << 31), /* Descriptor is owned by NIC. */
+	RingEnd     = (1 << 30), /* End of descriptor ring */
+	FirstFrag   = (1 << 29), /* First segment of a packet */
+	LastFrag    = (1 << 28), /* Final segment of a packet */
+
+	DescOwn_V3  = DescOwn, /* Descriptor is owned by NIC. */
+	RingEnd_V3  = RingEnd, /* End of descriptor ring */
+	FirstFrag_V3 = (1 << 25), /* First segment of a packet */
+	LastFrag_V3 = (1 << 24), /* Final segment of a packet */
+
+	/* TX private */
+	/*------ offset 0 of TX descriptor ------*/
+	LargeSend   = (1 << 27), /* TCP Large Send Offload (TSO) */
+	GiantSendv4 = (1 << 26), /* TCP Giant Send Offload V4 (GSOv4) */
+	GiantSendv6 = (1 << 25), /* TCP Giant Send Offload V6 (GSOv6) */
+	LargeSend_DP = (1 << 16), /* TCP Large Send Offload (TSO) */
+	MSSShift    = 16,        /* MSS value position */
+	MSSMask     = 0x7FFU,    /* MSS value 11 bits */
+	TxIPCS      = (1 << 18), /* Calculate IP checksum */
+	TxUDPCS     = (1 << 17), /* Calculate UDP/IP checksum */
+	TxTCPCS     = (1 << 16), /* Calculate TCP/IP checksum */
+	TxVlanTag   = (1 << 17), /* Add VLAN tag */
+
+	/*@@@@@@ offset 4 of TX descriptor => bits for RTL8169 only     begin @@@@@@*/
+	TxUDPCS_C   = (1 << 31), /* Calculate UDP/IP checksum */
+	TxTCPCS_C   = (1 << 30), /* Calculate TCP/IP checksum */
+	TxIPCS_C    = (1 << 29), /* Calculate IP checksum */
+	TxIPV6F_C   = (1 << 28), /* Indicate it is an IPv6 packet */
+	/*@@@@@@ offset 4 of tx descriptor => bits for RTL8169 only     end @@@@@@*/
+
+	/* RX private */
+	/* ------ offset 0 of RX descriptor ------ */
+	PID1        = (1 << 18), /* Protocol ID bit 1/2 */
+	PID0        = (1 << 17), /* Protocol ID bit 2/2 */
+
+#define RxProtoUDP  PID1
+#define RxProtoTCP  PID0
+#define RxProtoIP   (PID1 | PID0)
+#define RxProtoMask RxProtoIP
+
+	RxIPF       = (1 << 16), /* IP checksum failed */
+	RxUDPF      = (1 << 15), /* UDP/IP checksum failed */
+	RxTCPF      = (1 << 14), /* TCP/IP checksum failed */
+	RxVlanTag   = (1 << 16), /* VLAN tag available */
+
+	/*@@@@@@ offset 0 of RX descriptor => bits for RTL8169 only     begin @@@@@@*/
+	RxUDPT      = (1 << 18),
+	RxTCPT      = (1 << 17),
+	/*@@@@@@ offset 0 of RX descriptor => bits for RTL8169 only     end @@@@@@*/
+
+	/*@@@@@@ offset 4 of RX descriptor => bits for RTL8169 only     begin @@@@@@*/
+	RxV6F       = (1 << 31),
+	RxV4F       = (1 << 30),
+	/*@@@@@@ offset 4 of RX descriptor => bits for RTL8169 only     end @@@@@@*/
+
+	PID1_v3        = (1 << 29), /* Protocol ID bit 1/2 */
+	PID0_v3        = (1 << 28), /* Protocol ID bit 2/2 */
+
+#define RxProtoUDP_v3  PID1_v3
+#define RxProtoTCP_v3  PID0_v3
+#define RxProtoIP_v3   (PID1_v3 | PID0_v3)
+#define RxProtoMask_v3 RxProtoIP_v3
+
+	RxIPF_v3       = (1 << 26), /* IP checksum failed */
+	RxUDPF_v3      = (1 << 25), /* UDP/IP checksum failed */
+	RxTCPF_v3      = (1 << 24), /* TCP/IP checksum failed */
+	RxSCTPF_v3     = (1 << 23), /* TCP/IP checksum failed */
+	RxVlanTag_v3   = (RxVlanTag), /* VLAN tag available */
+
+	/*@@@@@@ offset 0 of RX descriptor => bits for RTL8169 only     begin @@@@@@*/
+	RxUDPT_v3      = (1 << 29),
+	RxTCPT_v3      = (1 << 28),
+	RxSCTP_v3      = (1 << 27),
+	/*@@@@@@ offset 0 of RX descriptor => bits for RTL8169 only     end @@@@@@*/
+
+	/*@@@@@@ offset 4 of RX descriptor => bits for RTL8169 only     begin @@@@@@*/
+	RxV6F_v3       = RxV6F,
+	RxV4F_v3       = RxV4F,
+	/*@@@@@@ offset 4 of RX descriptor => bits for RTL8169 only     end @@@@@@*/
+};
 /* ---------------------------------RX---------------------------------- */
+
+static void
+rtl_rx_queue_release_mbufs(struct rtl_rx_queue *rxq)
+{
+	int i;
+
+	PMD_INIT_FUNC_TRACE();
+
+	if (rxq != NULL) {
+		if (rxq->sw_ring != NULL) {
+			for (i = 0; i < rxq->nb_rx_desc; i++) {
+				if (rxq->sw_ring[i].mbuf != NULL) {
+					rte_pktmbuf_free_seg(rxq->sw_ring[i].mbuf);
+					rxq->sw_ring[i].mbuf = NULL;
+				}
+			}
+		}
+	}
+}
+
+void
+rtl_rx_queue_release(struct rte_eth_dev *dev, uint16_t rx_queue_id)
+{
+	struct rtl_rx_queue *rxq = dev->data->rx_queues[rx_queue_id];
+
+	PMD_INIT_FUNC_TRACE();
+
+	if (rxq != NULL) {
+		rtl_rx_queue_release_mbufs(rxq);
+		rte_free(rxq->sw_ring);
+		rte_free(rxq);
+	}
+}
+
+void
+rtl_rxq_info_get(struct rte_eth_dev *dev, uint16_t queue_id,
+		 struct rte_eth_rxq_info *qinfo)
+{
+	struct rtl_rx_queue *rxq;
+
+	rxq = dev->data->rx_queues[queue_id];
+
+	qinfo->mp = rxq->mb_pool;
+	qinfo->scattered_rx = dev->data->scattered_rx;
+	qinfo->nb_desc = rxq->nb_rx_desc;
+
+	qinfo->conf.rx_free_thresh = rxq->rx_free_thresh;
+	qinfo->conf.offloads = rxq->offloads;
+}
+
+static void
+rtl_reset_rx_queue(struct rtl_rx_queue *rxq)
+{
+	static const struct rtl_rx_desc zero_rxd = {0};
+	int i;
+
+	for (i = 0; i < rxq->nb_rx_desc; i++)
+		rxq->hw_ring[i] = zero_rxd;
+
+	rxq->hw_ring[rxq->nb_rx_desc - 1].opts1 = rte_cpu_to_le_32(RingEnd);
+	rxq->rx_tail = 0;
+	rxq->pkt_first_seg = NULL;
+	rxq->pkt_last_seg = NULL;
+}
+
+uint64_t
+rtl_get_rx_port_offloads(void)
+{
+	uint64_t offloads;
+
+	offloads = RTE_ETH_RX_OFFLOAD_IPV4_CKSUM  |
+		   RTE_ETH_RX_OFFLOAD_UDP_CKSUM   |
+		   RTE_ETH_RX_OFFLOAD_TCP_CKSUM   |
+		   RTE_ETH_RX_OFFLOAD_SCATTER     |
+		   RTE_ETH_RX_OFFLOAD_VLAN_STRIP;
+
+	return offloads;
+}
+
 int
-rtl_rx_init(struct rte_eth_dev *dev __rte_unused)
+rtl_rx_queue_setup(struct rte_eth_dev *dev, uint16_t queue_idx,
+		   uint16_t nb_rx_desc, unsigned int socket_id,
+		   const struct rte_eth_rxconf *rx_conf,
+		   struct rte_mempool *mb_pool)
 {
+	struct rtl_rx_queue *rxq;
+	const struct rte_memzone *mz;
+	struct rtl_adapter *adapter = RTL_DEV_PRIVATE(dev);
+	struct rtl_hw *hw = &adapter->hw;
+	uint32_t size;
+
+	PMD_INIT_FUNC_TRACE();
+
+	/*
+	 * If this queue existed already, free the associated memory. The
+	 * queue cannot be reused in case we need to allocate memory on
+	 * different socket than was previously used.
+	 */
+	if (dev->data->rx_queues[queue_idx] != NULL) {
+		rtl_rx_queue_release(dev, queue_idx);
+		dev->data->rx_queues[queue_idx] = NULL;
+	}
+
+	/* First allocate the rx queue data structure */
+	rxq = rte_zmalloc_socket("r8169 RX queue", sizeof(struct rtl_rx_queue),
+				 RTE_CACHE_LINE_SIZE, socket_id);
+
+	if (rxq == NULL) {
+		PMD_INIT_LOG(ERR, "Cannot allocate Rx queue structure");
+		return -ENOMEM;
+	}
+
+	/* Setup queue */
+	rxq->mb_pool = mb_pool;
+	rxq->nb_rx_desc = nb_rx_desc;
+	rxq->port_id = dev->data->port_id;
+	rxq->queue_id = queue_idx;
+	rxq->rx_free_thresh = rx_conf->rx_free_thresh;
+
+	/* Allocate memory for the software ring */
+	rxq->sw_ring = rte_calloc("r8169 sw rx ring", nb_rx_desc,
+				  sizeof(struct rtl_rx_entry), RTE_CACHE_LINE_SIZE);
+
+	if (rxq->sw_ring == NULL) {
+		PMD_INIT_LOG(ERR,
+			     "Port %d: Cannot allocate software ring for queue %d",
+			     rxq->port_id, rxq->queue_id);
+		rte_free(rxq);
+		return -ENOMEM;
+	}
+
+	/*
+	 * Allocate RX ring hardware descriptors. A memzone large enough to
+	 * handle the maximum ring size is allocated in order to allow for
+	 * resizing in later calls to the queue setup function.
+	 */
+	size = sizeof(struct rtl_rx_desc) * (nb_rx_desc + 1);
+	mz = rte_eth_dma_zone_reserve(dev, "rx_ring", queue_idx, size,
+				      RTL_RING_ALIGN, socket_id);
+	if (mz == NULL) {
+		PMD_INIT_LOG(ERR,
+			     "Port %d: Cannot allocate software ring for queue %d",
+			     rxq->port_id, rxq->queue_id);
+		rtl_rx_queue_release(dev, rxq->queue_id);
+		return -ENOMEM;
+	}
+
+	rxq->hw = hw;
+	rxq->hw_ring = mz->addr;
+	rxq->hw_ring_phys_addr = mz->iova;
+	rxq->offloads = rx_conf->offloads | dev->data->dev_conf.rxmode.offloads;
+
+	rtl_reset_rx_queue(rxq);
+
+	dev->data->rx_queues[queue_idx] = rxq;
+
 	return 0;
 }
 
-uint16_t
-rtl_recv_pkts(void *rxq __rte_unused, struct rte_mbuf **rx_pkts __rte_unused,
-	      uint16_t nb_pkts __rte_unused)
+static int
+rtl_alloc_rx_queue_mbufs(struct rtl_rx_queue *rxq)
+{
+	struct rtl_rx_entry *rxe = rxq->sw_ring;
+	struct rtl_hw *hw = rxq->hw;
+	struct rtl_rx_desc *rxd;
+	int i;
+	uint64_t dma_addr;
+
+	rxd = &rxq->hw_ring[0];
+
+	/* Initialize software ring entries */
+	for (i = 0; i < rxq->nb_rx_desc; i++) {
+		struct rte_mbuf *mbuf = rte_mbuf_raw_alloc(rxq->mb_pool);
+
+		if (mbuf == NULL) {
+			PMD_INIT_LOG(ERR, "RX mbuf alloc failed queue_id=%hu",
+				     rxq->queue_id);
+			return -ENOMEM;
+		}
+
+		dma_addr = rte_cpu_to_le_64(rte_mbuf_data_iova_default(mbuf));
+
+		rxd = &rxq->hw_ring[i];
+		rxd->addr = dma_addr;
+		rxd->opts2 = 0;
+		rte_wmb();
+		rxd->opts1 = rte_cpu_to_le_32(DescOwn | hw->rx_buf_sz);
+		rxe[i].mbuf = mbuf;
+	}
+
+	/* Mark as last desc */
+	rxd->opts1 |= rte_cpu_to_le_32(RingEnd);
+
+	return 0;
+}
+
+static int
+rtl_hw_set_features(struct rtl_hw *hw, uint64_t offloads)
 {
+	u16 cp_cmd;
+	u32 rx_config;
+
+	rx_config = RTL_R32(hw, RxConfig);
+	if (offloads & RTE_ETH_RX_OFFLOAD_VLAN_STRIP)
+		rx_config |= (EnableInnerVlan | EnableOuterVlan);
+	else
+		rx_config &= ~(EnableInnerVlan | EnableOuterVlan);
+
+	RTL_W32(hw, RxConfig, rx_config);
+
+	cp_cmd = RTL_R16(hw, CPlusCmd);
+
+	if (offloads & RTE_ETH_RX_OFFLOAD_CHECKSUM)
+		cp_cmd |= RxChkSum;
+	else
+		cp_cmd &= ~RxChkSum;
+
+	RTL_W16(hw, CPlusCmd, cp_cmd);
+
+	return 0;
+}
+
+static void
+rtl_hw_set_rx_packet_filter(struct rtl_hw *hw)
+{
+	int rx_mode;
+
+	hw->hw_ops.hw_init_rxcfg(hw);
+
+	rx_mode = AcceptBroadcast | AcceptMyPhys;
+	RTL_W32(hw, RxConfig, rx_mode | (RTL_R32(hw, RxConfig)));
+}
+
+int
+rtl_rx_init(struct rte_eth_dev *dev)
+{
+	struct rtl_adapter *adapter = RTL_DEV_PRIVATE(dev);
+	struct rtl_hw *hw = &adapter->hw;
+	struct rtl_rx_queue *rxq;
+	int ret;
+	u32 max_rx_pkt_size;
+
+	rxq = dev->data->rx_queues[0];
+
+	if (rxq->mb_pool == NULL) {
+		PMD_INIT_LOG(ERR, "r8169 rx queue pool not setup!");
+		return -ENOMEM;
+	}
+
+	RTL_W32(hw, RxDescAddrLow, ((u64)rxq->hw_ring_phys_addr & DMA_BIT_MASK(32)));
+	RTL_W32(hw, RxDescAddrHigh, ((u64)rxq->hw_ring_phys_addr >> 32));
+
+	dev->rx_pkt_burst = rtl_recv_pkts;
+	hw->rx_buf_sz = rte_pktmbuf_data_room_size(rxq->mb_pool) - RTE_PKTMBUF_HEADROOM;
+
+	max_rx_pkt_size = dev->data->mtu + RTL_ETH_OVERHEAD;
+
+	if (dev->data->dev_conf.rxmode.offloads & RTE_ETH_RX_OFFLOAD_SCATTER ||
+	    max_rx_pkt_size > hw->rx_buf_sz) {
+		if (!dev->data->scattered_rx)
+			PMD_INIT_LOG(DEBUG, "forcing scatter mode");
+		dev->rx_pkt_burst = rtl_recv_scattered_pkts;
+		dev->data->scattered_rx = 1;
+	}
+
+	RTL_W16(hw, RxMaxSize, max_rx_pkt_size);
+
+	ret = rtl_alloc_rx_queue_mbufs(rxq);
+	if (ret) {
+		PMD_INIT_LOG(ERR, "r8169 rx mbuf alloc failed!");
+		return ret;
+	}
+
+	rtl_enable_cfg9346_write(hw);
+
+	/* RX accept type and csum vlan offload */
+	rtl_hw_set_features(hw, rxq->offloads);
+
+	rtl_disable_rxdvgate(hw);
+
+	/* Set Rx packet filter */
+	rtl_hw_set_rx_packet_filter(hw);
+
+	rtl_disable_cfg9346_write(hw);
+
+	RTL_W8(hw, ChipCmd, RTL_R8(hw, ChipCmd) | CmdRxEnb);
+
+	dev->data->rx_queue_state[0] = RTE_ETH_QUEUE_STATE_STARTED;
+
 	return 0;
 }
 
+static inline void
+rtl_mark_to_asic(struct rtl_rx_desc *rxd, u32 size)
+{
+	u32 eor = rte_le_to_cpu_32(rxd->opts1) & RingEnd;
+
+	rxd->opts1 = rte_cpu_to_le_32(DescOwn | eor | size);
+}
+
+static inline uint64_t
+rtl_rx_desc_error_to_pkt_flags(struct rtl_rx_queue *rxq, uint32_t opts1,
+			       uint32_t opts2)
+{
+	uint64_t pkt_flags = 0;
+
+	if (!(rxq->offloads & RTE_ETH_RX_OFFLOAD_CHECKSUM))
+		goto exit;
+
+	/* RX csum offload for RTL8169*/
+	if (((opts2 & RxV4F) && !(opts1 & RxIPF)) || (opts2 & RxV6F)) {
+		pkt_flags |= RTE_MBUF_F_RX_IP_CKSUM_GOOD;
+		if (((opts1 & RxTCPT) && !(opts1 & RxTCPF)) ||
+		    ((opts1 & RxUDPT) && !(opts1 & RxUDPF)))
+			pkt_flags |= RTE_MBUF_F_RX_L4_CKSUM_GOOD;
+	}
+
+exit:
+	return pkt_flags;
+}
+
+/* PMD receive function */
+uint16_t
+rtl_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
+{
+	struct rtl_rx_queue *rxq = (struct rtl_rx_queue *)rx_queue;
+	struct rte_eth_dev *dev = &rte_eth_devices[rxq->port_id];
+	struct rtl_hw *hw = rxq->hw;
+	struct rtl_rx_desc *rxd;
+	struct rtl_rx_desc *hw_ring;
+	struct rtl_rx_entry *rxe;
+	struct rtl_rx_entry *sw_ring = rxq->sw_ring;
+	struct rte_mbuf *new_mb;
+	struct rte_mbuf *rmb;
+	struct rtl_adapter *adapter = RTL_DEV_PRIVATE(dev);
+	struct rtl_sw_stats *stats = &adapter->sw_stats;
+	uint16_t nb_rx = 0;
+	uint16_t nb_hold = 0;
+	uint16_t tail = rxq->rx_tail;
+	const uint16_t nb_rx_desc = rxq->nb_rx_desc;
+	uint32_t opts1;
+	uint32_t opts2;
+	uint16_t pkt_len = 0;
+	uint64_t dma_addr;
+
+	hw_ring = rxq->hw_ring;
+
+	RTE_ASSERT(RTL_R8(hw, ChipCmd) & CmdRxEnb);
+
+	while (nb_rx < nb_pkts) {
+		rxd = &hw_ring[tail];
+
+		opts1 = rte_le_to_cpu_32(rxd->opts1);
+		if (opts1 & DescOwn)
+			break;
+
+		/*
+		 * This barrier is needed to keep us from reading
+		 * any other fields out of the Rx descriptor until
+		 * we know the status of DescOwn.
+		 */
+		rte_rmb();
+
+		if (unlikely(opts1 & RxRES)) {
+			stats->rx_errors++;
+			rtl_mark_to_asic(rxd, hw->rx_buf_sz);
+			nb_hold++;
+			tail = (tail + 1) % nb_rx_desc;
+		} else {
+			opts2 = rte_le_to_cpu_32(rxd->opts2);
+
+			new_mb = rte_mbuf_raw_alloc(rxq->mb_pool);
+			if (new_mb == NULL) {
+				PMD_RX_LOG(DEBUG, "RX mbuf alloc failed port_id=%u "
+					   "queue_id=%u",
+					   (uint32_t)rxq->port_id, (uint32_t)rxq->queue_id);
+				dev->data->rx_mbuf_alloc_failed++;
+				break;
+			}
+
+			nb_hold++;
+			rxe = &sw_ring[tail];
+
+			rmb = rxe->mbuf;
+
+			tail = (tail + 1) % nb_rx_desc;
+
+			/* Prefetch next mbufs */
+			rte_prefetch0(sw_ring[tail].mbuf);
+
+			/*
+			 * When next RX descriptor is on a cache-line boundary,
+			 * prefetch the next 4 RX descriptors and the next 8 pointers
+			 * to mbufs.
+			 */
+			if ((tail & 0x3) == 0) {
+				rte_prefetch0(&sw_ring[tail]);
+				rte_prefetch0(&hw_ring[tail]);
+			}
+
+			/* Refill the RX desc */
+			rxe->mbuf = new_mb;
+			dma_addr = rte_cpu_to_le_64(rte_mbuf_data_iova_default(new_mb));
+
+			/* Setup RX descriptor */
+			rxd->addr = dma_addr;
+			rxd->opts2 = 0;
+			rte_wmb();
+			rtl_mark_to_asic(rxd, hw->rx_buf_sz);
+
+			pkt_len = opts1 & 0x00003fff;
+			pkt_len -= RTE_ETHER_CRC_LEN;
+
+			rmb->data_off = RTE_PKTMBUF_HEADROOM;
+			rte_prefetch1((char *)rmb->buf_addr + rmb->data_off);
+			rmb->nb_segs = 1;
+			rmb->next = NULL;
+			rmb->pkt_len = pkt_len;
+			rmb->data_len = pkt_len;
+			rmb->port = rxq->port_id;
+
+			if (opts2 & RxVlanTag)
+				rmb->vlan_tci = rte_bswap16(opts2 & 0xffff);
+
+			rmb->ol_flags = rtl_rx_desc_error_to_pkt_flags(rxq, opts1, opts2);
+
+			/*
+			 * Store the mbuf address into the next entry of the array
+			 * of returned packets.
+			 */
+			rx_pkts[nb_rx++] = rmb;
+
+			stats->rx_bytes += pkt_len;
+			stats->rx_packets++;
+		}
+	}
+
+	rxq->rx_tail = tail;
+
+	nb_hold = (uint16_t)(nb_hold + rxq->nb_rx_hold);
+	if (nb_hold > rxq->rx_free_thresh) {
+		rte_wmb();
+
+		/* Clear RDU */
+		RTL_W32(hw, ISR0_8125, (RxOK | RxErr | RxDescUnavail));
+
+		nb_hold = 0;
+	}
+
+	rxq->nb_rx_hold = nb_hold;
+
+	return nb_rx;
+}
+
+/* PMD receive function for scattered pkts */
+uint16_t
+rtl_recv_scattered_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
+			uint16_t nb_pkts)
+{
+	struct rtl_rx_queue *rxq = (struct rtl_rx_queue *)rx_queue;
+	struct rte_eth_dev *dev = &rte_eth_devices[rxq->port_id];
+	struct rtl_hw *hw = rxq->hw;
+	struct rtl_rx_desc *rxd;
+	struct rtl_rx_desc *hw_ring;
+	struct rtl_rx_entry *rxe;
+	struct rtl_rx_entry *sw_ring = rxq->sw_ring;
+	struct rte_mbuf *first_seg;
+	struct rte_mbuf *last_seg;
+	struct rte_mbuf *new_mb;
+	struct rte_mbuf *rmb;
+	struct rtl_adapter *adapter = RTL_DEV_PRIVATE(dev);
+	struct rtl_sw_stats *stats = &adapter->sw_stats;
+	uint16_t nb_rx = 0;
+	uint16_t nb_hold = 0;
+	uint16_t data_len = 0;
+	uint16_t tail = rxq->rx_tail;
+	const uint16_t nb_rx_desc = rxq->nb_rx_desc;
+	uint32_t opts1;
+	uint32_t opts2;
+	uint64_t dma_addr;
+
+	hw_ring = rxq->hw_ring;
+
+	/*
+	 * Retrieve RX context of current packet, if any.
+	 */
+	first_seg = rxq->pkt_first_seg;
+	last_seg = rxq->pkt_last_seg;
+
+	RTE_ASSERT(RTL_R8(hw, ChipCmd) & CmdRxEnb);
+
+	while (nb_rx < nb_pkts) {
+next_desc:
+		rxd = &hw_ring[tail];
+
+		opts1 = rte_le_to_cpu_32(rxd->opts1);
+		if (opts1 & DescOwn)
+			break;
+
+		/*
+		 * This barrier is needed to keep us from reading
+		 * any other fields out of the Rx descriptor until
+		 * we know the status of DescOwn
+		 */
+		rte_rmb();
+
+		if (unlikely(opts1 & RxRES)) {
+			stats->rx_errors++;
+			rtl_mark_to_asic(rxd, hw->rx_buf_sz);
+			nb_hold++;
+			tail = (tail + 1) % nb_rx_desc;
+		} else {
+			opts2 = rte_le_to_cpu_32(rxd->opts2);
+
+			new_mb = rte_mbuf_raw_alloc(rxq->mb_pool);
+			if (new_mb == NULL) {
+				PMD_RX_LOG(DEBUG, "RX mbuf alloc failed port_id=%u "
+					   "queue_id=%u",
+					   (uint32_t)rxq->port_id, (uint32_t)rxq->queue_id);
+				dev->data->rx_mbuf_alloc_failed++;
+				break;
+			}
+
+			nb_hold++;
+			rxe = &sw_ring[tail];
+
+			rmb = rxe->mbuf;
+
+			/* Prefetch next mbufs */
+			tail = (tail + 1) % nb_rx_desc;
+			rte_prefetch0(sw_ring[tail].mbuf);
+
+			/*
+			 * When next RX descriptor is on a cache-line boundary,
+			 * prefetch the next 4 RX descriptors and the next 8 pointers
+			 * to mbufs.
+			 */
+			if ((tail & 0x3) == 0) {
+				rte_prefetch0(&sw_ring[tail]);
+				rte_prefetch0(&hw_ring[tail]);
+			}
+
+			/* Refill the RX desc */
+			rxe->mbuf = new_mb;
+			dma_addr = rte_cpu_to_le_64(rte_mbuf_data_iova_default(new_mb));
+
+			/* Setup RX descriptor */
+			rxd->addr = dma_addr;
+			rxd->opts2 = 0;
+			rte_wmb();
+			rtl_mark_to_asic(rxd, hw->rx_buf_sz);
+
+			data_len = opts1 & 0x00003fff;
+			rmb->data_len = data_len;
+			rmb->data_off = RTE_PKTMBUF_HEADROOM;
+
+			/*
+			 * If this is the first buffer of the received packet,
+			 * set the pointer to the first mbuf of the packet and
+			 * initialize its context.
+			 * Otherwise, update the total length and the number of segments
+			 * of the current scattered packet, and update the pointer to
+			 * the last mbuf of the current packet.
+			 */
+			if (first_seg == NULL) {
+				first_seg = rmb;
+				first_seg->pkt_len = data_len;
+				first_seg->nb_segs = 1;
+			} else {
+				first_seg->pkt_len += data_len;
+				first_seg->nb_segs++;
+				last_seg->next = rmb;
+			}
+
+			/*
+			 * If this is not the last buffer of the received packet,
+			 * update the pointer to the last mbuf of the current scattered
+			 * packet and continue to parse the RX ring.
+			 */
+			if (!(opts1 & LastFrag)) {
+				last_seg = rmb;
+				goto next_desc;
+			}
+
+			/*
+			 * This is the last buffer of the received packet.
+			 */
+			rmb->next = NULL;
+
+			first_seg->pkt_len -= RTE_ETHER_CRC_LEN;
+			if (data_len <= RTE_ETHER_CRC_LEN) {
+				rte_pktmbuf_free_seg(rmb);
+				first_seg->nb_segs--;
+				last_seg->data_len = last_seg->data_len -
+						     (RTE_ETHER_CRC_LEN - data_len);
+				last_seg->next = NULL;
+			} else {
+				rmb->data_len = data_len - RTE_ETHER_CRC_LEN;
+			}
+
+			first_seg->port = rxq->port_id;
+
+			if (opts2 & RxVlanTag)
+				first_seg->vlan_tci = rte_bswap16(opts2 & 0xffff);
+
+			first_seg->ol_flags = rtl_rx_desc_error_to_pkt_flags(rxq, opts1, opts2);
+
+			rte_prefetch1((char *)first_seg->buf_addr + first_seg->data_off);
+
+			/*
+			 * Store the mbuf address into the next entry of the array
+			 * of returned packets.
+			 */
+			rx_pkts[nb_rx++] = first_seg;
+
+			stats->rx_bytes += first_seg->pkt_len;
+			stats->rx_packets++;
+
+			/*
+			 * Setup receipt context for a new packet.
+			 */
+			first_seg = NULL;
+		}
+	}
+
+	/*
+	 * Record index of the next RX descriptor to probe.
+	 */
+	rxq->rx_tail = tail;
+
+	/*
+	 * Save receive context.
+	 */
+	rxq->pkt_first_seg = first_seg;
+	rxq->pkt_last_seg = last_seg;
+
+	nb_hold = (uint16_t)(nb_hold + rxq->nb_rx_hold);
+	if (nb_hold > rxq->rx_free_thresh) {
+		rte_wmb();
+
+		/* Clear RDU */
+		RTL_W32(hw, ISR0_8125, (RxOK | RxErr | RxDescUnavail));
+
+		nb_hold = 0;
+	}
+
+	rxq->nb_rx_hold = nb_hold;
+
+	return nb_rx;
+}
+
 /* ---------------------------------TX---------------------------------- */
 int
 rtl_tx_init(struct rte_eth_dev *dev __rte_unused)
@@ -43,3 +801,30 @@ rtl_xmit_pkts(void *txq __rte_unused, struct rte_mbuf **tx_pkts __rte_unused,
 {
 	return 0;
 }
+
+int
+rtl_stop_queues(struct rte_eth_dev *dev)
+{
+	struct rtl_rx_queue *rxq;
+
+	PMD_INIT_FUNC_TRACE();
+
+	rxq = dev->data->rx_queues[0];
+
+	rtl_rx_queue_release_mbufs(rxq);
+	rtl_reset_rx_queue(rxq);
+	dev->data->rx_queue_state[0] = RTE_ETH_QUEUE_STATE_STOPPED;
+
+	return 0;
+}
+
+void
+rtl_free_queues(struct rte_eth_dev *dev)
+{
+	PMD_INIT_FUNC_TRACE();
+
+	rte_eth_dma_zone_free(dev, "rx_ring", 0);
+	rtl_rx_queue_release(dev, 0);
+	dev->data->rx_queues[0] = 0;
+	dev->data->nb_rx_queues = 0;
+}
-- 
2.34.1