[PATCH 1/9] net/ngbe: fix failed to receive packets

[Jiawen Wu <jiawenwu@trustnetic.com>]

Initialize Rx packet buffer before starting RxTx, ensure to receive
packets.

Fixes: 62fc35e63d0e ("net/ngbe: support Rx queue start/stop")
Cc: stable@dpdk.org

Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
---
 drivers/net/ngbe/base/ngbe_dummy.h |  4 ++++
 drivers/net/ngbe/base/ngbe_hw.c    | 27 +++++++++++++++++++++++++++
 drivers/net/ngbe/base/ngbe_hw.h    |  2 ++
 drivers/net/ngbe/base/ngbe_type.h  |  7 +++++++
 drivers/net/ngbe/ngbe_ethdev.c     |  1 +
 5 files changed, 41 insertions(+)

diff --git a/drivers/net/ngbe/base/ngbe_dummy.h b/drivers/net/ngbe/base/ngbe_dummy.h
index 61b0d82bfb..d74c9f7b54 100644
--- a/drivers/net/ngbe/base/ngbe_dummy.h
+++ b/drivers/net/ngbe/base/ngbe_dummy.h
@@ -114,6 +114,9 @@ static inline s32 ngbe_mac_get_link_capabilities_dummy(struct ngbe_hw *TUP0,
 {
 	return NGBE_ERR_OPS_DUMMY;
 }
+static inline void ngbe_setup_pba_dummy(struct ngbe_hw *TUP0)
+{
+}
 static inline s32 ngbe_mac_led_on_dummy(struct ngbe_hw *TUP0, u32 TUP1)
 {
 	return NGBE_ERR_OPS_DUMMY;
@@ -298,6 +301,7 @@ static inline void ngbe_init_ops_dummy(struct ngbe_hw *hw)
 	hw->mac.setup_link = ngbe_mac_setup_link_dummy;
 	hw->mac.check_link = ngbe_mac_check_link_dummy;
 	hw->mac.get_link_capabilities = ngbe_mac_get_link_capabilities_dummy;
+	hw->mac.setup_pba = ngbe_setup_pba_dummy;
 	hw->mac.led_on = ngbe_mac_led_on_dummy;
 	hw->mac.led_off = ngbe_mac_led_off_dummy;
 	hw->mac.set_rar = ngbe_mac_set_rar_dummy;
diff --git a/drivers/net/ngbe/base/ngbe_hw.c b/drivers/net/ngbe/base/ngbe_hw.c
index 0716357725..0b22ea0fb3 100644
--- a/drivers/net/ngbe/base/ngbe_hw.c
+++ b/drivers/net/ngbe/base/ngbe_hw.c
@@ -1609,6 +1609,30 @@ void ngbe_set_mac_anti_spoofing(struct ngbe_hw *hw, bool enable, int vf)
 	wr32(hw, NGBE_POOLTXASMAC, pfvfspoof);
 }
 
+/**
+ * ngbe_set_pba - Initialize Rx packet buffer
+ * @hw: pointer to hardware structure
+ * @headroom: reserve n KB of headroom
+ **/
+void ngbe_set_pba(struct ngbe_hw *hw)
+{
+	u32 rxpktsize = hw->mac.rx_pb_size;
+	u32 txpktsize, txpbthresh;
+
+	/* Reserve 256 KB of headroom */
+	rxpktsize -= 256;
+
+	rxpktsize <<= 10;
+	wr32(hw, NGBE_PBRXSIZE, rxpktsize);
+
+	/* Only support an equally distributed Tx packet buffer strategy. */
+	txpktsize = NGBE_PBTXSIZE_MAX;
+	txpbthresh = (txpktsize / 1024) - NGBE_TXPKT_SIZE_MAX;
+
+	wr32(hw, NGBE_PBTXSIZE, txpktsize);
+	wr32(hw, NGBE_PBTXDMATH, txpbthresh);
+}
+
 /**
  *  ngbe_set_vlan_anti_spoofing - Enable/Disable VLAN anti-spoofing
  *  @hw: pointer to hardware structure
@@ -1907,6 +1931,8 @@ s32 ngbe_init_ops_pf(struct ngbe_hw *hw)
 	mac->check_link = ngbe_check_mac_link_em;
 	mac->setup_link = ngbe_setup_mac_link_em;
 
+	mac->setup_pba = ngbe_set_pba;
+
 	/* Manageability interface */
 	mac->init_thermal_sensor_thresh = ngbe_init_thermal_sensor_thresh;
 	mac->check_overtemp = ngbe_mac_check_overtemp;
@@ -1928,6 +1954,7 @@ s32 ngbe_init_ops_pf(struct ngbe_hw *hw)
 	mac->mcft_size		= NGBE_EM_MC_TBL_SIZE;
 	mac->vft_size		= NGBE_EM_VFT_TBL_SIZE;
 	mac->num_rar_entries	= NGBE_EM_RAR_ENTRIES;
+	mac->rx_pb_size		= NGBE_EM_RX_PB_SIZE;
 	mac->max_rx_queues	= NGBE_EM_MAX_RX_QUEUES;
 	mac->max_tx_queues	= NGBE_EM_MAX_TX_QUEUES;
 
diff --git a/drivers/net/ngbe/base/ngbe_hw.h b/drivers/net/ngbe/base/ngbe_hw.h
index ad7e8fc2d9..b32cf87ff4 100644
--- a/drivers/net/ngbe/base/ngbe_hw.h
+++ b/drivers/net/ngbe/base/ngbe_hw.h
@@ -13,6 +13,7 @@
 #define NGBE_EM_RAR_ENTRIES   32
 #define NGBE_EM_MC_TBL_SIZE   32
 #define NGBE_EM_VFT_TBL_SIZE  128
+#define NGBE_EM_RX_PB_SIZE    42 /*KB*/
 
 s32 ngbe_init_hw(struct ngbe_hw *hw);
 s32 ngbe_start_hw(struct ngbe_hw *hw);
@@ -44,6 +45,7 @@ s32 ngbe_update_mc_addr_list(struct ngbe_hw *hw, u8 *mc_addr_list,
 				      ngbe_mc_addr_itr func, bool clear);
 s32 ngbe_disable_sec_rx_path(struct ngbe_hw *hw);
 s32 ngbe_enable_sec_rx_path(struct ngbe_hw *hw);
+void ngbe_set_pba(struct ngbe_hw *hw);
 
 s32 ngbe_setup_fc_em(struct ngbe_hw *hw);
 s32 ngbe_fc_enable(struct ngbe_hw *hw);
diff --git a/drivers/net/ngbe/base/ngbe_type.h b/drivers/net/ngbe/base/ngbe_type.h
index 12847b7272..269e087d50 100644
--- a/drivers/net/ngbe/base/ngbe_type.h
+++ b/drivers/net/ngbe/base/ngbe_type.h
@@ -11,6 +11,9 @@
 #define NGBE_FRAME_SIZE_MAX       (9728) /* Maximum frame size, +FCS */
 #define NGBE_FRAME_SIZE_DFT       (1522) /* Default frame size, +FCS */
 #define NGBE_NUM_POOL             (32)
+#define NGBE_PBRXSIZE_MAX         0x00080000 /* 512KB Packet Buffer */
+#define NGBE_PBTXSIZE_MAX         0x00005000 /* 20KB Packet Buffer */
+#define NGBE_TXPKT_SIZE_MAX       0xA /* Max Tx Packet size */
 #define NGBE_MAX_QP               (8)
 #define NGBE_MAX_UTA              128
 
@@ -269,6 +272,9 @@ struct ngbe_mac_info {
 	s32 (*get_link_capabilities)(struct ngbe_hw *hw,
 				      u32 *speed, bool *autoneg);
 
+	/* Packet Buffer manipulation */
+	void (*setup_pba)(struct ngbe_hw *hw);
+
 	/* LED */
 	s32 (*led_on)(struct ngbe_hw *hw, u32 index);
 	s32 (*led_off)(struct ngbe_hw *hw, u32 index);
@@ -311,6 +317,7 @@ struct ngbe_mac_info {
 	u32 mcft_size;
 	u32 vft_size;
 	u32 num_rar_entries;
+	u32 rx_pb_size;
 	u32 max_tx_queues;
 	u32 max_rx_queues;
 	bool get_link_status;
diff --git a/drivers/net/ngbe/ngbe_ethdev.c b/drivers/net/ngbe/ngbe_ethdev.c
index 0d66c32551..180489ce38 100644
--- a/drivers/net/ngbe/ngbe_ethdev.c
+++ b/drivers/net/ngbe/ngbe_ethdev.c
@@ -1004,6 +1004,7 @@ ngbe_dev_start(struct rte_eth_dev *dev)
 		goto error;
 	}
 
+	hw->mac.setup_pba(hw);
 	ngbe_configure_port(dev);
 
 	err = ngbe_dev_rxtx_start(dev);
-- 
2.21.0.windows.1