RX descriptor merge mode is supported on AML devices. When it is
enabled, the hardware process the RX descriptors in batches.

Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
---
 drivers/net/ethernet/wangxun/libwx/wx_hw.c          | 10 ++++++++++
 drivers/net/ethernet/wangxun/libwx/wx_type.h        |  7 +++++++
 drivers/net/ethernet/wangxun/libwx/wx_vf.h          |  1 +
 drivers/net/ethernet/wangxun/libwx/wx_vf_lib.c      |  3 +++
 drivers/net/ethernet/wangxun/txgbe/txgbe_main.c     |  1 +
 drivers/net/ethernet/wangxun/txgbevf/txgbevf_main.c | 11 +++++++++++
 6 files changed, 33 insertions(+)

diff --git a/drivers/net/ethernet/wangxun/libwx/wx_hw.c b/drivers/net/ethernet/wangxun/libwx/wx_hw.c
index 1e2713f0c921..2dbbb42aa9c0 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_hw.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_hw.c
@@ -1935,6 +1935,10 @@ static void wx_configure_rx_ring(struct wx *wx,
 		rxdctl |= (ring->count / 128) << WX_PX_RR_CFG_RR_SIZE_SHIFT;
 
 	rxdctl |= 0x1 << WX_PX_RR_CFG_RR_THER_SHIFT;
+
+	if (test_bit(WX_FLAG_RX_MERGE_ENABLED, wx->flags))
+		rxdctl |= WX_PX_RR_CFG_DESC_MERGE;
+
 	wr32(wx, WX_PX_RR_CFG(reg_idx), rxdctl);
 
 	/* reset head and tail pointers */
@@ -2190,6 +2194,12 @@ void wx_configure_rx(struct wx *wx)
 	/* set_rx_buffer_len must be called before ring initialization */
 	wx_set_rx_buffer_len(wx);
 
+	if (test_bit(WX_FLAG_RX_MERGE_ENABLED, wx->flags)) {
+		wr32(wx, WX_RDM_DCACHE_CTL, WX_RDM_DCACHE_CTL_EN);
+		wr32m(wx, WX_RDM_RSC_CTL,
+		      WX_RDM_RSC_CTL_FREE_CTL | WX_RDM_RSC_CTL_FREE_CNT_DIS,
+		      WX_RDM_RSC_CTL_FREE_CTL);
+	}
 	/* Setup the HW Rx Head and Tail Descriptor Pointers and
 	 * the Base and Length of the Rx Descriptor Ring
 	 */
diff --git a/drivers/net/ethernet/wangxun/libwx/wx_type.h b/drivers/net/ethernet/wangxun/libwx/wx_type.h
index 4880268b620e..eb3f32551c14 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_type.h
+++ b/drivers/net/ethernet/wangxun/libwx/wx_type.h
@@ -83,8 +83,13 @@
 
 /*********************** Receive DMA registers **************************/
 #define WX_RDM_VF_RE(_i)             (0x12004 + ((_i) * 4))
+#define WX_RDM_RSC_CTL               0x1200C
+#define WX_RDM_RSC_CTL_FREE_CNT_DIS  BIT(8)
+#define WX_RDM_RSC_CTL_FREE_CTL      BIT(7)
 #define WX_RDM_PF_QDE(_i)            (0x12080 + ((_i) * 4))
 #define WX_RDM_VFRE_CLR(_i)          (0x120A0 + ((_i) * 4))
+#define WX_RDM_DCACHE_CTL            0x120A8
+#define WX_RDM_DCACHE_CTL_EN         BIT(0)
 #define WX_RDM_DRP_PKT               0x12500
 #define WX_RDM_PKT_CNT               0x12504
 #define WX_RDM_BYTE_CNT_LSB          0x12508
@@ -447,6 +452,7 @@ enum WX_MSCA_CMD_value {
 #define WX_PX_RR_CFG_VLAN            BIT(31)
 #define WX_PX_RR_CFG_DROP_EN         BIT(30)
 #define WX_PX_RR_CFG_SPLIT_MODE      BIT(26)
+#define WX_PX_RR_CFG_DESC_MERGE      BIT(19)
 #define WX_PX_RR_CFG_RR_THER_SHIFT   16
 #define WX_PX_RR_CFG_RR_HDR_SZ       GENMASK(15, 12)
 #define WX_PX_RR_CFG_RR_BUF_SZ       GENMASK(11, 8)
@@ -1232,6 +1238,7 @@ enum wx_pf_flags {
 	WX_FLAG_NEED_SFP_RESET,
 	WX_FLAG_NEED_UPDATE_LINK,
 	WX_FLAG_NEED_DO_RESET,
+	WX_FLAG_RX_MERGE_ENABLED,
 	WX_PF_FLAGS_NBITS               /* must be last */
 };
 
diff --git a/drivers/net/ethernet/wangxun/libwx/wx_vf.h b/drivers/net/ethernet/wangxun/libwx/wx_vf.h
index 3f16de0fa427..ecb198592393 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_vf.h
+++ b/drivers/net/ethernet/wangxun/libwx/wx_vf.h
@@ -74,6 +74,7 @@
 #define WX_VXRXDCTL_BUFSZ(f)     FIELD_PREP(GENMASK(11, 8), f)
 #define WX_VXRXDCTL_HDRSZ_MASK   GENMASK(15, 12)
 #define WX_VXRXDCTL_HDRSZ(f)     FIELD_PREP(GENMASK(15, 12), f)
+#define WX_VXRXDCTL_DESC_MERGE   BIT(19)
 #define WX_VXRXDCTL_RSCMAX_MASK  GENMASK(24, 23)
 #define WX_VXRXDCTL_RSCMAX(f)    FIELD_PREP(GENMASK(24, 23), f)
 #define WX_VXRXDCTL_RSCEN        BIT(29)
diff --git a/drivers/net/ethernet/wangxun/libwx/wx_vf_lib.c b/drivers/net/ethernet/wangxun/libwx/wx_vf_lib.c
index a87887b9f8ee..f54107f3c6d7 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_vf_lib.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_vf_lib.c
@@ -272,6 +272,9 @@ void wx_configure_rx_ring_vf(struct wx *wx, struct wx_ring *ring)
 	rxdctl |= WX_VXRXDCTL_RSCMAX(0);
 	rxdctl |= WX_VXRXDCTL_RSCEN;
 
+	if (test_bit(WX_FLAG_RX_MERGE_ENABLED, wx->flags))
+		rxdctl |= WX_VXRXDCTL_DESC_MERGE;
+
 	wr32(wx, WX_VXRXDCTL(reg_idx), rxdctl);
 
 	/* pf/vf reuse */
diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c b/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
index c4c4d70d8466..60a04c5a7678 100644
--- a/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
+++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
@@ -423,6 +423,7 @@ static int txgbe_sw_init(struct wx *wx)
 		break;
 	case wx_mac_aml:
 	case wx_mac_aml40:
+		set_bit(WX_FLAG_RX_MERGE_ENABLED, wx->flags);
 		set_bit(WX_FLAG_SWFW_RING, wx->flags);
 		wx->swfw_index = 0;
 		break;
diff --git a/drivers/net/ethernet/wangxun/txgbevf/txgbevf_main.c b/drivers/net/ethernet/wangxun/txgbevf/txgbevf_main.c
index 72663e3c4205..52c1e223bbd7 100644
--- a/drivers/net/ethernet/wangxun/txgbevf/txgbevf_main.c
+++ b/drivers/net/ethernet/wangxun/txgbevf/txgbevf_main.c
@@ -157,6 +157,17 @@ static int txgbevf_sw_init(struct wx *wx)
 
 	wx->set_num_queues = txgbevf_set_num_queues;
 
+	switch (wx->mac.type) {
+	case wx_mac_sp:
+		break;
+	case wx_mac_aml:
+	case wx_mac_aml40:
+		set_bit(WX_FLAG_RX_MERGE_ENABLED, wx->flags);
+		break;
+	default:
+		break;
+	}
+
 	return 0;
 err_reset_hw:
 	kfree(wx->vfinfo);
-- 
2.48.1

TX head write-back mode is supported on AML devices. When it is enabled,
the hardware no longer writes the descriptors DD one by one, but write
back pointer of completion descriptor to the head_wb address.

Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
---
 drivers/net/ethernet/wangxun/libwx/wx_hw.c    |  9 ++++
 drivers/net/ethernet/wangxun/libwx/wx_lib.c   | 53 ++++++++++++++++++-
 drivers/net/ethernet/wangxun/libwx/wx_type.h  |  7 +++
 drivers/net/ethernet/wangxun/libwx/wx_vf.h    |  3 ++
 .../net/ethernet/wangxun/libwx/wx_vf_lib.c    |  9 ++++
 .../net/ethernet/wangxun/txgbe/txgbe_main.c   |  1 +
 .../ethernet/wangxun/txgbevf/txgbevf_main.c   |  1 +
 7 files changed, 81 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/wangxun/libwx/wx_hw.c b/drivers/net/ethernet/wangxun/libwx/wx_hw.c
index 2dbbb42aa9c0..986bc5acc472 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_hw.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_hw.c
@@ -1905,6 +1905,15 @@ static void wx_configure_tx_ring(struct wx *wx,
 	memset(ring->tx_buffer_info, 0,
 	       sizeof(struct wx_tx_buffer) * ring->count);
 
+	if (ring->headwb_mem) {
+		wr32(wx, WX_PX_TR_HEAD_ADDRL(reg_idx),
+		     ring->headwb_dma & DMA_BIT_MASK(32));
+		wr32(wx, WX_PX_TR_HEAD_ADDRH(reg_idx),
+		     upper_32_bits(ring->headwb_dma));
+
+		txdctl |= WX_PX_TR_CFG_HEAD_WB;
+	}
+
 	/* enable queue */
 	wr32(wx, WX_PX_TR_CFG(reg_idx), txdctl);
 
diff --git a/drivers/net/ethernet/wangxun/libwx/wx_lib.c b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
index 3adf7048320a..622213fe6790 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_lib.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
@@ -735,9 +735,22 @@ static bool wx_clean_tx_irq(struct wx_q_vector *q_vector,
 		/* prevent any other reads prior to eop_desc */
 		smp_rmb();
 
-		/* if DD is not set pending work has not been completed */
-		if (!(eop_desc->wb.status & cpu_to_le32(WX_TXD_STAT_DD)))
+		if (tx_ring->headwb_mem) {
+			u32 head = *tx_ring->headwb_mem;
+
+			if (head == tx_ring->next_to_clean)
+				break;
+			else if (head > tx_ring->next_to_clean &&
+				 !(tx_buffer->next_eop >= tx_ring->next_to_clean &&
+				   tx_buffer->next_eop < head))
+				break;
+			else if (!(tx_buffer->next_eop >= tx_ring->next_to_clean ||
+				   tx_buffer->next_eop < head))
+				break;
+		} else if (!(eop_desc->wb.status & cpu_to_le32(WX_TXD_STAT_DD))) {
+			/* if DD is not set pending work has not been completed */
 			break;
+		}
 
 		/* clear next_to_watch to prevent false hangs */
 		tx_buffer->next_to_watch = NULL;
@@ -1075,6 +1088,10 @@ static int wx_tx_map(struct wx_ring *tx_ring,
 	/* set next_to_watch value indicating a packet is present */
 	first->next_to_watch = tx_desc;
 
+	/* set next_eop for amlite tx head wb */
+	if (tx_ring->headwb_mem)
+		first->next_eop = i;
+
 	i++;
 	if (i == tx_ring->count)
 		i = 0;
@@ -2683,6 +2700,16 @@ void wx_clean_all_tx_rings(struct wx *wx)
 }
 EXPORT_SYMBOL(wx_clean_all_tx_rings);
 
+static void wx_free_headwb_resources(struct wx_ring *tx_ring)
+{
+	if (!tx_ring->headwb_mem)
+		return;
+
+	dma_free_coherent(tx_ring->dev, sizeof(u32),
+			  tx_ring->headwb_mem, tx_ring->headwb_dma);
+	tx_ring->headwb_mem = NULL;
+}
+
 /**
  * wx_free_tx_resources - Free Tx Resources per Queue
  * @tx_ring: Tx descriptor ring for a specific queue
@@ -2702,6 +2729,8 @@ static void wx_free_tx_resources(struct wx_ring *tx_ring)
 	dma_free_coherent(tx_ring->dev, tx_ring->size,
 			  tx_ring->desc, tx_ring->dma);
 	tx_ring->desc = NULL;
+
+	wx_free_headwb_resources(tx_ring);
 }
 
 /**
@@ -2840,6 +2869,24 @@ static int wx_setup_all_rx_resources(struct wx *wx)
 	return err;
 }
 
+static void wx_setup_headwb_resources(struct wx_ring *tx_ring)
+{
+	struct wx *wx = netdev_priv(tx_ring->netdev);
+
+	if (!test_bit(WX_FLAG_TXHEAD_WB_ENABLED, wx->flags))
+		return;
+
+	if (!tx_ring->q_vector)
+		return;
+
+	tx_ring->headwb_mem = dma_alloc_coherent(tx_ring->dev,
+						 sizeof(u32),
+						 &tx_ring->headwb_dma,
+						 GFP_KERNEL);
+	if (!tx_ring->headwb_mem)
+		dev_info(tx_ring->dev, "Allocate headwb memory failed, disable it\n");
+}
+
 /**
  * wx_setup_tx_resources - allocate Tx resources (Descriptors)
  * @tx_ring: tx descriptor ring (for a specific queue) to setup
@@ -2880,6 +2927,8 @@ static int wx_setup_tx_resources(struct wx_ring *tx_ring)
 	if (!tx_ring->desc)
 		goto err;
 
+	wx_setup_headwb_resources(tx_ring);
+
 	tx_ring->next_to_use = 0;
 	tx_ring->next_to_clean = 0;
 
diff --git a/drivers/net/ethernet/wangxun/libwx/wx_type.h b/drivers/net/ethernet/wangxun/libwx/wx_type.h
index eb3f32551c14..8b3c39945c0b 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_type.h
+++ b/drivers/net/ethernet/wangxun/libwx/wx_type.h
@@ -434,12 +434,15 @@ enum WX_MSCA_CMD_value {
 #define WX_PX_TR_WP(_i)              (0x03008 + ((_i) * 0x40))
 #define WX_PX_TR_RP(_i)              (0x0300C + ((_i) * 0x40))
 #define WX_PX_TR_CFG(_i)             (0x03010 + ((_i) * 0x40))
+#define WX_PX_TR_HEAD_ADDRL(_i)      (0x03028 + ((_i) * 0x40))
+#define WX_PX_TR_HEAD_ADDRH(_i)      (0x0302C + ((_i) * 0x40))
 /* Transmit Config masks */
 #define WX_PX_TR_CFG_ENABLE          BIT(0) /* Ena specific Tx Queue */
 #define WX_PX_TR_CFG_TR_SIZE_SHIFT   1 /* tx desc number per ring */
 #define WX_PX_TR_CFG_SWFLSH          BIT(26) /* Tx Desc. wr-bk flushing */
 #define WX_PX_TR_CFG_WTHRESH_SHIFT   16 /* shift to WTHRESH bits */
 #define WX_PX_TR_CFG_THRE_SHIFT      8
+#define WX_PX_TR_CFG_HEAD_WB         BIT(27)
 
 /* Receive DMA Registers */
 #define WX_PX_RR_BAL(_i)             (0x01000 + ((_i) * 0x40))
@@ -1011,6 +1014,7 @@ struct wx_tx_buffer {
 	DEFINE_DMA_UNMAP_LEN(len);
 	__be16 protocol;
 	u32 tx_flags;
+	u32 next_eop;
 };
 
 struct wx_rx_buffer {
@@ -1062,6 +1066,8 @@ struct wx_ring {
 	};
 	u8 __iomem *tail;
 	dma_addr_t dma;                 /* phys. address of descriptor ring */
+	dma_addr_t headwb_dma;
+	u32 *headwb_mem;
 	unsigned int size;              /* length in bytes */
 
 	u16 count;                      /* amount of descriptors */
@@ -1239,6 +1245,7 @@ enum wx_pf_flags {
 	WX_FLAG_NEED_UPDATE_LINK,
 	WX_FLAG_NEED_DO_RESET,
 	WX_FLAG_RX_MERGE_ENABLED,
+	WX_FLAG_TXHEAD_WB_ENABLED,
 	WX_PF_FLAGS_NBITS               /* must be last */
 };
 
diff --git a/drivers/net/ethernet/wangxun/libwx/wx_vf.h b/drivers/net/ethernet/wangxun/libwx/wx_vf.h
index ecb198592393..eb6ca3fe4e97 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_vf.h
+++ b/drivers/net/ethernet/wangxun/libwx/wx_vf.h
@@ -92,6 +92,9 @@
 #define WX_VXTXDCTL_PTHRESH(f)   FIELD_PREP(GENMASK(11, 8), f)
 #define WX_VXTXDCTL_WTHRESH(f)   FIELD_PREP(GENMASK(22, 16), f)
 #define WX_VXTXDCTL_FLUSH        BIT(26)
+#define WX_VXTXDCTL_HEAD_WB      BIT(27)
+#define WX_VXTXD_HEAD_ADDRL(r)   (0x3028 + (0x40 * (r)))
+#define WX_VXTXD_HEAD_ADDRH(r)   (0x302C + (0x40 * (r)))
 
 #define WX_PFLINK_STATUS(g)      FIELD_GET(BIT(0), g)
 #define WX_PFLINK_SPEED(g)       FIELD_GET(GENMASK(31, 1), g)
diff --git a/drivers/net/ethernet/wangxun/libwx/wx_vf_lib.c b/drivers/net/ethernet/wangxun/libwx/wx_vf_lib.c
index f54107f3c6d7..aa8be036956c 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_vf_lib.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_vf_lib.c
@@ -132,6 +132,15 @@ static void wx_configure_tx_ring_vf(struct wx *wx, struct wx_ring *ring)
 	txdctl |= WX_VXTXDCTL_BUFLEN(wx_buf_len(ring->count));
 	txdctl |= WX_VXTXDCTL_ENABLE;
 
+	if (ring->headwb_mem) {
+		wr32(wx, WX_VXTXD_HEAD_ADDRL(reg_idx),
+		     ring->headwb_dma & DMA_BIT_MASK(32));
+		wr32(wx, WX_VXTXD_HEAD_ADDRH(reg_idx),
+		     upper_32_bits(ring->headwb_dma));
+
+		txdctl |= WX_VXTXDCTL_HEAD_WB;
+	}
+
 	/* reinitialize tx_buffer_info */
 	memset(ring->tx_buffer_info, 0,
 	       sizeof(struct wx_tx_buffer) * ring->count);
diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c b/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
index 60a04c5a7678..ff690e9a075a 100644
--- a/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
+++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
@@ -424,6 +424,7 @@ static int txgbe_sw_init(struct wx *wx)
 	case wx_mac_aml:
 	case wx_mac_aml40:
 		set_bit(WX_FLAG_RX_MERGE_ENABLED, wx->flags);
+		set_bit(WX_FLAG_TXHEAD_WB_ENABLED, wx->flags);
 		set_bit(WX_FLAG_SWFW_RING, wx->flags);
 		wx->swfw_index = 0;
 		break;
diff --git a/drivers/net/ethernet/wangxun/txgbevf/txgbevf_main.c b/drivers/net/ethernet/wangxun/txgbevf/txgbevf_main.c
index 52c1e223bbd7..37e4ec487afd 100644
--- a/drivers/net/ethernet/wangxun/txgbevf/txgbevf_main.c
+++ b/drivers/net/ethernet/wangxun/txgbevf/txgbevf_main.c
@@ -163,6 +163,7 @@ static int txgbevf_sw_init(struct wx *wx)
 	case wx_mac_aml:
 	case wx_mac_aml40:
 		set_bit(WX_FLAG_RX_MERGE_ENABLED, wx->flags);
+		set_bit(WX_FLAG_TXHEAD_WB_ENABLED, wx->flags);
 		break;
 	default:
 		break;
-- 
2.48.1

Support to enable and disable RSC for txgbe devices.

Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
---
 .../net/ethernet/wangxun/libwx/wx_ethtool.c   | 61 ++++++++++++-
 drivers/net/ethernet/wangxun/libwx/wx_hw.c    | 50 ++++++++++-
 drivers/net/ethernet/wangxun/libwx/wx_lib.c   | 90 +++++++++++++++++--
 drivers/net/ethernet/wangxun/libwx/wx_sriov.c |  4 +
 drivers/net/ethernet/wangxun/libwx/wx_type.h  | 33 +++++--
 .../net/ethernet/wangxun/txgbe/txgbe_main.c   |  3 +
 6 files changed, 224 insertions(+), 17 deletions(-)

diff --git a/drivers/net/ethernet/wangxun/libwx/wx_ethtool.c b/drivers/net/ethernet/wangxun/libwx/wx_ethtool.c
index 06f401bd975c..9aa3964187e1 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_ethtool.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_ethtool.c
@@ -51,6 +51,11 @@ static const struct wx_stats wx_gstrings_fdir_stats[] = {
 	WX_STAT("fdir_miss", stats.fdirmiss),
 };
 
+static const struct wx_stats wx_gstrings_rsc_stats[] = {
+	WX_STAT("rsc_aggregated", rsc_count),
+	WX_STAT("rsc_flushed", rsc_flush),
+};
+
 /* drivers allocates num_tx_queues and num_rx_queues symmetrically so
  * we set the num_rx_queues to evaluate to num_tx_queues. This is
  * used because we do not have a good way to get the max number of
@@ -64,16 +69,21 @@ static const struct wx_stats wx_gstrings_fdir_stats[] = {
 		(sizeof(struct wx_queue_stats) / sizeof(u64)))
 #define WX_GLOBAL_STATS_LEN  ARRAY_SIZE(wx_gstrings_stats)
 #define WX_FDIR_STATS_LEN  ARRAY_SIZE(wx_gstrings_fdir_stats)
+#define WX_RSC_STATS_LEN  ARRAY_SIZE(wx_gstrings_rsc_stats)
 #define WX_STATS_LEN (WX_GLOBAL_STATS_LEN + WX_QUEUE_STATS_LEN)
 
 int wx_get_sset_count(struct net_device *netdev, int sset)
 {
 	struct wx *wx = netdev_priv(netdev);
+	int len = WX_STATS_LEN;
 
 	switch (sset) {
 	case ETH_SS_STATS:
-		return (test_bit(WX_FLAG_FDIR_CAPABLE, wx->flags)) ?
-			WX_STATS_LEN + WX_FDIR_STATS_LEN : WX_STATS_LEN;
+		if (test_bit(WX_FLAG_FDIR_CAPABLE, wx->flags))
+			len += WX_FDIR_STATS_LEN;
+		if (test_bit(WX_FLAG_RSC_CAPABLE, wx->flags))
+			len += WX_RSC_STATS_LEN;
+		return len;
 	default:
 		return -EOPNOTSUPP;
 	}
@@ -94,6 +104,10 @@ void wx_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
 			for (i = 0; i < WX_FDIR_STATS_LEN; i++)
 				ethtool_puts(&p, wx_gstrings_fdir_stats[i].stat_string);
 		}
+		if (test_bit(WX_FLAG_RSC_CAPABLE, wx->flags)) {
+			for (i = 0; i < WX_RSC_STATS_LEN; i++)
+				ethtool_puts(&p, wx_gstrings_rsc_stats[i].stat_string);
+		}
 		for (i = 0; i < netdev->num_tx_queues; i++) {
 			ethtool_sprintf(&p, "tx_queue_%u_packets", i);
 			ethtool_sprintf(&p, "tx_queue_%u_bytes", i);
@@ -131,6 +145,13 @@ void wx_get_ethtool_stats(struct net_device *netdev,
 		}
 	}
 
+	if (test_bit(WX_FLAG_RSC_CAPABLE, wx->flags)) {
+		for (k = 0; k < WX_RSC_STATS_LEN; k++) {
+			p = (char *)wx + wx_gstrings_rsc_stats[k].stat_offset;
+			data[i++] = *(u64 *)p;
+		}
+	}
+
 	for (j = 0; j < netdev->num_tx_queues; j++) {
 		ring = wx->tx_ring[j];
 		if (!ring) {
@@ -322,6 +343,40 @@ int wx_get_coalesce(struct net_device *netdev,
 }
 EXPORT_SYMBOL(wx_get_coalesce);
 
+static void wx_update_rsc(struct wx *wx)
+{
+	struct net_device *netdev = wx->netdev;
+	bool need_reset = false;
+
+	/* nothing to do if LRO or RSC are not enabled */
+	if (!test_bit(WX_FLAG_RSC_CAPABLE, wx->flags) ||
+	    !(netdev->features & NETIF_F_LRO))
+		return;
+
+	/* check the feature flag value and enable RSC if necessary */
+	if (wx->rx_itr_setting == 1 ||
+	    wx->rx_itr_setting > WX_MIN_RSC_ITR) {
+		if (!test_bit(WX_FLAG_RSC_ENABLED, wx->flags)) {
+			set_bit(WX_FLAG_RSC_ENABLED, wx->flags);
+			dev_info(&wx->pdev->dev,
+				 "rx-usecs value high enough to re-enable RSC\n");
+
+			need_reset = true;
+		}
+	/* if interrupt rate is too high then disable RSC */
+	} else if (test_bit(WX_FLAG_RSC_ENABLED, wx->flags)) {
+		clear_bit(WX_FLAG_RSC_ENABLED, wx->flags);
+		dev_info(&wx->pdev->dev,
+			 "rx-usecs set too low, disabling RSC\n");
+
+		need_reset = true;
+	}
+
+	/* reset the device to apply the new RSC setting */
+	if (need_reset && wx->do_reset)
+		wx->do_reset(netdev);
+}
+
 int wx_set_coalesce(struct net_device *netdev,
 		    struct ethtool_coalesce *ec,
 		    struct kernel_ethtool_coalesce *kernel_coal,
@@ -414,6 +469,8 @@ int wx_set_coalesce(struct net_device *netdev,
 		wx_write_eitr(q_vector);
 	}
 
+	wx_update_rsc(wx);
+
 	return 0;
 }
 EXPORT_SYMBOL(wx_set_coalesce);
diff --git a/drivers/net/ethernet/wangxun/libwx/wx_hw.c b/drivers/net/ethernet/wangxun/libwx/wx_hw.c
index 986bc5acc472..814164459707 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_hw.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_hw.c
@@ -1779,7 +1779,9 @@ EXPORT_SYMBOL(wx_set_rx_mode);
 static void wx_set_rx_buffer_len(struct wx *wx)
 {
 	struct net_device *netdev = wx->netdev;
+	struct wx_ring *rx_ring;
 	u32 mhadd, max_frame;
+	int i;
 
 	max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 	/* adjust max frame to be at least the size of a standard frame */
@@ -1789,6 +1791,19 @@ static void wx_set_rx_buffer_len(struct wx *wx)
 	mhadd = rd32(wx, WX_PSR_MAX_SZ);
 	if (max_frame != mhadd)
 		wr32(wx, WX_PSR_MAX_SZ, max_frame);
+
+	/*
+	 * Setup the HW Rx Head and Tail Descriptor Pointers and
+	 * the Base and Length of the Rx Descriptor Ring
+	 */
+	for (i = 0; i < wx->num_rx_queues; i++) {
+		rx_ring = wx->rx_ring[i];
+		rx_ring->rx_buf_len = WX_RXBUFFER_2K;
+#if (PAGE_SIZE < 8192)
+		if (test_bit(WX_FLAG_RSC_ENABLED, wx->flags))
+			rx_ring->rx_buf_len = WX_RXBUFFER_3K;
+#endif
+	}
 }
 
 /**
@@ -1865,11 +1880,27 @@ static void wx_configure_srrctl(struct wx *wx,
 	srrctl |= WX_RXBUFFER_256 << WX_PX_RR_CFG_BHDRSIZE_SHIFT;
 
 	/* configure the packet buffer length */
-	srrctl |= WX_RX_BUFSZ >> WX_PX_RR_CFG_BSIZEPKT_SHIFT;
+	srrctl |= rx_ring->rx_buf_len >> WX_PX_RR_CFG_BSIZEPKT_SHIFT;
 
 	wr32(wx, WX_PX_RR_CFG(reg_idx), srrctl);
 }
 
+static void wx_configure_rscctl(struct wx *wx,
+				struct wx_ring *ring)
+{
+	u8 reg_idx = ring->reg_idx;
+	u32 rscctrl;
+
+	if (!test_bit(WX_FLAG_RSC_ENABLED, wx->flags))
+		return;
+
+	rscctrl = rd32(wx, WX_PX_RR_CFG(reg_idx));
+	rscctrl |= WX_PX_RR_CFG_RSC;
+	rscctrl |= WX_PX_RR_CFG_MAX_RSCBUF_16;
+
+	wr32(wx, WX_PX_RR_CFG(reg_idx), rscctrl);
+}
+
 static void wx_configure_tx_ring(struct wx *wx,
 				 struct wx_ring *ring)
 {
@@ -1956,6 +1987,7 @@ static void wx_configure_rx_ring(struct wx *wx,
 	ring->tail = wx->hw_addr + WX_PX_RR_WP(reg_idx);
 
 	wx_configure_srrctl(wx, ring);
+	wx_configure_rscctl(wx, ring);
 
 	/* initialize rx_buffer_info */
 	memset(ring->rx_buffer_info, 0,
@@ -2194,7 +2226,9 @@ void wx_configure_rx(struct wx *wx)
 		/* RSC Setup */
 		psrctl = rd32(wx, WX_PSR_CTL);
 		psrctl |= WX_PSR_CTL_RSC_ACK; /* Disable RSC for ACK packets */
-		psrctl |= WX_PSR_CTL_RSC_DIS;
+		psrctl &= ~WX_PSR_CTL_RSC_DIS;
+		if (!test_bit(WX_FLAG_RSC_ENABLED, wx->flags))
+			psrctl |= WX_PSR_CTL_RSC_DIS;
 		wr32(wx, WX_PSR_CTL, psrctl);
 	}
 
@@ -2824,6 +2858,18 @@ void wx_update_stats(struct wx *wx)
 	wx->hw_csum_rx_error = hw_csum_rx_error;
 	wx->hw_csum_rx_good = hw_csum_rx_good;
 
+	if (test_bit(WX_FLAG_RSC_ENABLED, wx->flags)) {
+		u64 rsc_count = 0;
+		u64 rsc_flush = 0;
+
+		for (i = 0; i < wx->num_rx_queues; i++) {
+			rsc_count += wx->rx_ring[i]->rx_stats.rsc_count;
+			rsc_flush += wx->rx_ring[i]->rx_stats.rsc_flush;
+		}
+		wx->rsc_count = rsc_count;
+		wx->rsc_flush = rsc_flush;
+	}
+
 	for (i = 0; i < wx->num_tx_queues; i++) {
 		struct wx_ring *tx_ring = wx->tx_ring[i];
 
diff --git a/drivers/net/ethernet/wangxun/libwx/wx_lib.c b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
index 622213fe6790..32cadafa4b3b 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_lib.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
@@ -235,7 +235,7 @@ static struct sk_buff *wx_build_skb(struct wx_ring *rx_ring,
 {
 	unsigned int size = le16_to_cpu(rx_desc->wb.upper.length);
 #if (PAGE_SIZE < 8192)
-	unsigned int truesize = WX_RX_BUFSZ;
+	unsigned int truesize = wx_rx_pg_size(rx_ring) / 2;
 #else
 	unsigned int truesize = ALIGN(size, L1_CACHE_BYTES);
 #endif
@@ -341,7 +341,7 @@ void wx_alloc_rx_buffers(struct wx_ring *rx_ring, u16 cleaned_count)
 		/* sync the buffer for use by the device */
 		dma_sync_single_range_for_device(rx_ring->dev, bi->dma,
 						 bi->page_offset,
-						 WX_RX_BUFSZ,
+						 rx_ring->rx_buf_len,
 						 DMA_FROM_DEVICE);
 
 		rx_desc->read.pkt_addr =
@@ -404,6 +404,7 @@ static bool wx_is_non_eop(struct wx_ring *rx_ring,
 			  union wx_rx_desc *rx_desc,
 			  struct sk_buff *skb)
 {
+	struct wx *wx = rx_ring->q_vector->wx;
 	u32 ntc = rx_ring->next_to_clean + 1;
 
 	/* fetch, update, and store next to clean */
@@ -412,6 +413,24 @@ static bool wx_is_non_eop(struct wx_ring *rx_ring,
 
 	prefetch(WX_RX_DESC(rx_ring, ntc));
 
+	/* update RSC append count if present */
+	if (test_bit(WX_FLAG_RSC_ENABLED, wx->flags)) {
+		__le32 rsc_enabled = rx_desc->wb.lower.lo_dword.data &
+				     cpu_to_le32(WX_RXD_RSCCNT_MASK);
+
+		if (unlikely(rsc_enabled)) {
+			u32 rsc_cnt = le32_to_cpu(rsc_enabled);
+
+			rsc_cnt >>= WX_RXD_RSCCNT_SHIFT;
+			WX_CB(skb)->append_cnt += rsc_cnt - 1;
+
+			/* update ntc based on RSC value */
+			ntc = le32_to_cpu(rx_desc->wb.upper.status_error);
+			ntc &= WX_RXD_NEXTP_MASK;
+			ntc >>= WX_RXD_NEXTP_SHIFT;
+		}
+	}
+
 	/* if we are the last buffer then there is nothing else to do */
 	if (likely(wx_test_staterr(rx_desc, WX_RXD_STAT_EOP)))
 		return false;
@@ -582,6 +601,33 @@ static void wx_rx_vlan(struct wx_ring *ring, union wx_rx_desc *rx_desc,
 	}
 }
 
+static void wx_set_rsc_gso_size(struct wx_ring *ring,
+				struct sk_buff *skb)
+{
+	u16 hdr_len = skb_headlen(skb);
+
+	/* set gso_size to avoid messing up TCP MSS */
+	skb_shinfo(skb)->gso_size = DIV_ROUND_UP((skb->len - hdr_len),
+						 WX_CB(skb)->append_cnt);
+	skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
+}
+
+static void wx_update_rsc_stats(struct wx_ring *rx_ring,
+				struct sk_buff *skb)
+{
+	/* if append_cnt is 0 then frame is not RSC */
+	if (!WX_CB(skb)->append_cnt)
+		return;
+
+	rx_ring->rx_stats.rsc_count += WX_CB(skb)->append_cnt;
+	rx_ring->rx_stats.rsc_flush++;
+
+	wx_set_rsc_gso_size(rx_ring, skb);
+
+	/* gso_size is computed using append_cnt so always clear it last */
+	WX_CB(skb)->append_cnt = 0;
+}
+
 /**
  * wx_process_skb_fields - Populate skb header fields from Rx descriptor
  * @rx_ring: rx descriptor ring packet is being transacted on
@@ -598,6 +644,9 @@ static void wx_process_skb_fields(struct wx_ring *rx_ring,
 {
 	struct wx *wx = netdev_priv(rx_ring->netdev);
 
+	if (test_bit(WX_FLAG_RSC_CAPABLE, wx->flags))
+		wx_update_rsc_stats(rx_ring, skb);
+
 	wx_rx_hash(rx_ring, rx_desc, skb);
 	wx_rx_checksum(rx_ring, rx_desc, skb);
 
@@ -2549,7 +2598,7 @@ static void wx_clean_rx_ring(struct wx_ring *rx_ring)
 		dma_sync_single_range_for_cpu(rx_ring->dev,
 					      rx_buffer->dma,
 					      rx_buffer->page_offset,
-					      WX_RX_BUFSZ,
+					      rx_ring->rx_buf_len,
 					      DMA_FROM_DEVICE);
 
 		/* free resources associated with mapping */
@@ -2760,13 +2809,14 @@ static int wx_alloc_page_pool(struct wx_ring *rx_ring)
 
 	struct page_pool_params pp_params = {
 		.flags = PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV,
-		.order = 0,
-		.pool_size = rx_ring->count,
+		.order = wx_rx_pg_order(rx_ring),
+		.pool_size = rx_ring->count * rx_ring->rx_buf_len /
+			     wx_rx_pg_size(rx_ring),
 		.nid = dev_to_node(rx_ring->dev),
 		.dev = rx_ring->dev,
 		.dma_dir = DMA_FROM_DEVICE,
 		.offset = 0,
-		.max_len = PAGE_SIZE,
+		.max_len = wx_rx_pg_size(rx_ring),
 	};
 
 	rx_ring->page_pool = page_pool_create(&pp_params);
@@ -3075,8 +3125,25 @@ int wx_set_features(struct net_device *netdev, netdev_features_t features)
 	else if (changed & (NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_CTAG_FILTER))
 		wx_set_rx_mode(netdev);
 
+	if (test_bit(WX_FLAG_RSC_CAPABLE, wx->flags)) {
+		if (!(features & NETIF_F_LRO)) {
+			if (test_bit(WX_FLAG_RSC_ENABLED, wx->flags))
+				need_reset = true;
+			clear_bit(WX_FLAG_RSC_ENABLED, wx->flags);
+		} else if (!(test_bit(WX_FLAG_RSC_ENABLED, wx->flags))) {
+			if (wx->rx_itr_setting == 1 ||
+			    wx->rx_itr_setting > WX_MIN_RSC_ITR) {
+				set_bit(WX_FLAG_RSC_ENABLED, wx->flags);
+				need_reset = true;
+			} else if (changed & NETIF_F_LRO) {
+				dev_info(&wx->pdev->dev,
+					 "rx-usecs set too low, disable RSC\n");
+			}
+		}
+	}
+
 	if (!(test_bit(WX_FLAG_FDIR_CAPABLE, wx->flags)))
-		return 0;
+		goto out;
 
 	/* Check if Flow Director n-tuple support was enabled or disabled.  If
 	 * the state changed, we need to reset.
@@ -3102,6 +3169,7 @@ int wx_set_features(struct net_device *netdev, netdev_features_t features)
 		break;
 	}
 
+out:
 	if (need_reset && wx->do_reset)
 		wx->do_reset(netdev);
 
@@ -3151,6 +3219,14 @@ netdev_features_t wx_fix_features(struct net_device *netdev,
 		}
 	}
 
+	/* If Rx checksum is disabled, then RSC/LRO should also be disabled */
+	if (!(features & NETIF_F_RXCSUM))
+		features &= ~NETIF_F_LRO;
+
+	/* Turn off LRO if not RSC capable */
+	if (!test_bit(WX_FLAG_RSC_CAPABLE, wx->flags))
+		features &= ~NETIF_F_LRO;
+
 	return features;
 }
 EXPORT_SYMBOL(wx_fix_features);
diff --git a/drivers/net/ethernet/wangxun/libwx/wx_sriov.c b/drivers/net/ethernet/wangxun/libwx/wx_sriov.c
index c6d158cd70da..493da5fffdb6 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_sriov.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_sriov.c
@@ -122,6 +122,10 @@ static int __wx_enable_sriov(struct wx *wx, u8 num_vfs)
 	      WX_CFG_PORT_CTL_NUM_VT_MASK,
 	      value);
 
+	/* Disable RSC when in SR-IOV mode */
+	clear_bit(WX_FLAG_RSC_CAPABLE, wx->flags);
+	clear_bit(WX_FLAG_RSC_ENABLED, wx->flags);
+
 	return ret;
 }
 
diff --git a/drivers/net/ethernet/wangxun/libwx/wx_type.h b/drivers/net/ethernet/wangxun/libwx/wx_type.h
index 8b3c39945c0b..d0cbcded1dd4 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_type.h
+++ b/drivers/net/ethernet/wangxun/libwx/wx_type.h
@@ -424,6 +424,7 @@ enum WX_MSCA_CMD_value {
 #define WX_7K_ITR                    595
 #define WX_12K_ITR                   336
 #define WX_20K_ITR                   200
+#define WX_MIN_RSC_ITR               24
 #define WX_SP_MAX_EITR               0x00000FF8U
 #define WX_AML_MAX_EITR              0x00000FFFU
 #define WX_EM_MAX_EITR               0x00007FFCU
@@ -454,7 +455,9 @@ enum WX_MSCA_CMD_value {
 /* PX_RR_CFG bit definitions */
 #define WX_PX_RR_CFG_VLAN            BIT(31)
 #define WX_PX_RR_CFG_DROP_EN         BIT(30)
+#define WX_PX_RR_CFG_RSC             BIT(29)
 #define WX_PX_RR_CFG_SPLIT_MODE      BIT(26)
+#define WX_PX_RR_CFG_MAX_RSCBUF_16   FIELD_PREP(GENMASK(24, 23), 3)
 #define WX_PX_RR_CFG_DESC_MERGE      BIT(19)
 #define WX_PX_RR_CFG_RR_THER_SHIFT   16
 #define WX_PX_RR_CFG_RR_HDR_SZ       GENMASK(15, 12)
@@ -551,14 +554,9 @@ enum WX_MSCA_CMD_value {
 /* Supported Rx Buffer Sizes */
 #define WX_RXBUFFER_256      256    /* Used for skb receive header */
 #define WX_RXBUFFER_2K       2048
+#define WX_RXBUFFER_3K       3072
 #define WX_MAX_RXBUFFER      16384  /* largest size for single descriptor */
 
-#if MAX_SKB_FRAGS < 8
-#define WX_RX_BUFSZ      ALIGN(WX_MAX_RXBUFFER / MAX_SKB_FRAGS, 1024)
-#else
-#define WX_RX_BUFSZ      WX_RXBUFFER_2K
-#endif
-
 #define WX_RX_BUFFER_WRITE   16      /* Must be power of 2 */
 
 #define WX_MAX_DATA_PER_TXD  BIT(14)
@@ -652,6 +650,12 @@ enum wx_l2_ptypes {
 
 #define WX_RXD_PKTTYPE(_rxd) \
 	((le32_to_cpu((_rxd)->wb.lower.lo_dword.data) >> 9) & 0xFF)
+
+#define WX_RXD_RSCCNT_MASK           GENMASK(20, 17)
+#define WX_RXD_RSCCNT_SHIFT          17
+#define WX_RXD_NEXTP_MASK            GENMASK(19, 4)
+#define WX_RXD_NEXTP_SHIFT           4
+
 /*********************** Transmit Descriptor Config Masks ****************/
 #define WX_TXD_STAT_DD               BIT(0)  /* Descriptor Done */
 #define WX_TXD_DTYP_DATA             0       /* Adv Data Descriptor */
@@ -1039,6 +1043,8 @@ struct wx_rx_queue_stats {
 	u64 csum_good_cnt;
 	u64 csum_err;
 	u64 alloc_rx_buff_failed;
+	u64 rsc_count;
+	u64 rsc_flush;
 };
 
 /* iterator for handling rings in ring container */
@@ -1081,6 +1087,7 @@ struct wx_ring {
 					 */
 	u16 next_to_use;
 	u16 next_to_clean;
+	u16 rx_buf_len;
 	union {
 		u16 next_to_alloc;
 		struct {
@@ -1237,6 +1244,7 @@ enum wx_pf_flags {
 	WX_FLAG_FDIR_HASH,
 	WX_FLAG_FDIR_PERFECT,
 	WX_FLAG_RSC_CAPABLE,
+	WX_FLAG_RSC_ENABLED,
 	WX_FLAG_RX_HWTSTAMP_ENABLED,
 	WX_FLAG_RX_HWTSTAMP_IN_REGISTER,
 	WX_FLAG_PTP_PPS_ENABLED,
@@ -1352,6 +1360,8 @@ struct wx {
 	u64 hw_csum_rx_good;
 	u64 hw_csum_rx_error;
 	u64 alloc_rx_buff_failed;
+	u64 rsc_count;
+	u64 rsc_flush;
 	unsigned int num_vfs;
 	struct vf_data_storage *vfinfo;
 	struct vf_macvlans vf_mvs;
@@ -1483,4 +1493,15 @@ static inline int wx_set_state_reset(struct wx *wx)
 	return 0;
 }
 
+static inline unsigned int wx_rx_pg_order(struct wx_ring *ring)
+{
+#if (PAGE_SIZE < 8192)
+	if (ring->rx_buf_len == WX_RXBUFFER_3K)
+		return 1;
+#endif
+	return 0;
+}
+
+#define wx_rx_pg_size(_ring) (PAGE_SIZE << wx_rx_pg_order(_ring))
+
 #endif /* _WX_TYPE_H_ */
diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c b/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
index ff690e9a075a..daa761e48f9d 100644
--- a/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
+++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
@@ -398,6 +398,7 @@ static int txgbe_sw_init(struct wx *wx)
 	wx->configure_fdir = txgbe_configure_fdir;
 
 	set_bit(WX_FLAG_RSC_CAPABLE, wx->flags);
+	set_bit(WX_FLAG_RSC_ENABLED, wx->flags);
 	set_bit(WX_FLAG_MULTI_64_FUNC, wx->flags);
 
 	/* enable itr by default in dynamic mode */
@@ -803,6 +804,8 @@ static int txgbe_probe(struct pci_dev *pdev,
 	netdev->features |= NETIF_F_HIGHDMA;
 	netdev->hw_features |= NETIF_F_GRO;
 	netdev->features |= NETIF_F_GRO;
+	netdev->hw_features |= NETIF_F_LRO;
+	netdev->features |= NETIF_F_LRO;
 	netdev->features |= NETIF_F_RX_UDP_TUNNEL_PORT;
 
 	netdev->priv_flags |= IFF_UNICAST_FLT;
-- 
2.48.1