ralink: fix hw status almost full not work on mt7620 and mt7621

the old FE_INT_STATUS register becomes two registers.
FE_INT_STATUS and INT_STATUS. so the hw status almost full
must change to read from FE_INT_STATUS register.
tx/rx done read from INT_STATUS register.

mt7620 datasheet define CNT_GDM1_AF at BIT(29).
but after test it should be BIT(13). why?

Signed-off-by: michael lee <igvtee@gmail.com>

SVN-Revision: 44371

target/linux/ramips/files/drivers/net/ethernet/ralink/ralink_soc_eth.c

@@ -923,26 +923,33 @@ static int fe_poll(struct napi_struct *napi, int budget)
 	struct fe_priv *priv = container_of(napi, struct fe_priv, rx_napi);
 	struct fe_hw_stats *hwstat = priv->hw_stats;
 	int tx_done, rx_done;
-	u32 status, mask;
+	u32 status, fe_status, status_reg, mask;
-	u32 tx_intr, rx_intr;
+	u32 tx_intr, rx_intr, status_intr;
 
-	status = fe_reg_r32(FE_REG_FE_INT_STATUS);
+	fe_status = status = fe_reg_r32(FE_REG_FE_INT_STATUS);
 	tx_intr = priv->soc->tx_int;
 	rx_intr = priv->soc->rx_int;
+	status_intr = priv->soc->status_int;
 	tx_done = rx_done = 0;
 
+	if (fe_reg_table[FE_REG_FE_INT_STATUS2]) {
+		fe_status = fe_reg_r32(FE_REG_FE_INT_STATUS2);
+		status_reg = FE_REG_FE_INT_STATUS2;
+	} else
+		status_reg = FE_REG_FE_INT_STATUS;
+
 	if (status & tx_intr)
 		tx_done = fe_poll_tx(priv, budget, tx_intr);
 
 	if (status & rx_intr)
 		rx_done = fe_poll_rx(napi, budget, priv, rx_intr);
 
-	if (unlikely(hwstat && (status & FE_CNT_GDM_AF))) {
+	if (unlikely(fe_status & status_intr)) {
-		if (spin_trylock(&hwstat->stats_lock)) {
+		if (hwstat && spin_trylock(&hwstat->stats_lock)) {
 			fe_stats_update(priv);
 			spin_unlock(&hwstat->stats_lock);
 		}
-		fe_reg_w32(FE_CNT_GDM_AF, FE_REG_FE_INT_STATUS);
+		fe_reg_w32(status_intr, status_reg);
 	}
 
 	if (unlikely(netif_msg_intr(priv))) {

target/linux/ramips/files/drivers/net/ethernet/ralink/ralink_soc_eth.h

@@ -49,6 +49,7 @@ enum fe_reg {
 	FE_REG_FE_DMA_VID_BASE,
 	FE_REG_FE_COUNTER_BASE,
 	FE_REG_FE_RST_GL,
+	FE_REG_FE_INT_STATUS2,
 	FE_REG_COUNT
 };
 
@@ -407,6 +408,7 @@ struct fe_soc_data
 	u32 pdma_glo_cfg;
 	u32 rx_int;
 	u32 tx_int;
+	u32 status_int;
 	u32 checksum_bit;
 };
 

target/linux/ramips/files/drivers/net/ethernet/ralink/soc_mt7620.c

@@ -62,6 +62,15 @@
 #define GSW_REG_GDMA1_MAC_ADRH	0x50C
 
 #define MT7621_FE_RST_GL	(FE_FE_OFFSET + 0x04)
+#define MT7620_FE_INT_STATUS2	(FE_FE_OFFSET + 0x08)
+
+/*
+ * FE_INT_STATUS reg on mt7620 define CNT_GDM1_AF at BIT(29)
+ * but after test it should be BIT(13).
+ */
+#define MT7620_FE_GDM1_AF	BIT(13)
+#define MT7621_FE_GDM1_AF	BIT(28)
+#define MT7621_FE_GDM2_AF	BIT(29)
 
 static const u32 mt7620_reg_table[FE_REG_COUNT] = {
 	[FE_REG_PDMA_GLO_CFG] = RT5350_PDMA_GLO_CFG,
@@ -80,6 +89,7 @@ static const u32 mt7620_reg_table[FE_REG_COUNT] = {
 	[FE_REG_FE_DMA_VID_BASE] = MT7620_DMA_VID,
 	[FE_REG_FE_COUNTER_BASE] = MT7620_GDM1_TX_GBCNT,
 	[FE_REG_FE_RST_GL] = MT7621_FE_RST_GL,
+	[FE_REG_FE_INT_STATUS2] = MT7620_FE_INT_STATUS2,
 };
 
 static const u32 mt7621_reg_table[FE_REG_COUNT] = {
@@ -99,6 +109,7 @@ static const u32 mt7621_reg_table[FE_REG_COUNT] = {
 	[FE_REG_FE_DMA_VID_BASE] = 0,
 	[FE_REG_FE_COUNTER_BASE] = MT7621_GDM1_TX_GBCNT,
 	[FE_REG_FE_RST_GL] = MT7621_FE_RST_GL,
+	[FE_REG_FE_INT_STATUS2] = MT7620_FE_INT_STATUS2,
 };
 
 static void mt7620_fe_reset(void)
@@ -231,6 +242,7 @@ static struct fe_soc_data mt7620_data = {
 	.pdma_glo_cfg = FE_PDMA_SIZE_16DWORDS,
 	.rx_int = RT5350_RX_DONE_INT,
 	.tx_int = RT5350_TX_DONE_INT,
+	.status_int = MT7620_FE_GDM1_AF,
 	.checksum_bit = MT7620_L4_VALID,
 	.has_carrier = mt7620a_has_carrier,
 	.mdio_read = mt7620_mdio_read,
@@ -251,6 +263,7 @@ static struct fe_soc_data mt7621_data = {
 	.pdma_glo_cfg = FE_PDMA_SIZE_16DWORDS,
 	.rx_int = RT5350_RX_DONE_INT,
 	.tx_int = RT5350_TX_DONE_INT,
+	.status_int = (MT7621_FE_GDM1_AF | MT7621_FE_GDM2_AF),
 	.checksum_bit = MT7621_L4_VALID,
 	.has_carrier = mt7620a_has_carrier,
 	.mdio_read = mt7620_mdio_read,

target/linux/ramips/files/drivers/net/ethernet/ralink/soc_rt2880.c

@@ -65,6 +65,7 @@ struct fe_soc_data rt2880_data = {
 	.checksum_bit = RX_DMA_L4VALID,
 	.rx_int = FE_RX_DONE_INT,
 	.tx_int = FE_TX_DONE_INT,
+	.status_int = FE_CNT_GDM_AF,
 	.mdio_read = rt2880_mdio_read,
 	.mdio_write = rt2880_mdio_write,
 	.mdio_adjust_link = rt2880_mdio_link_adjust,

target/linux/ramips/files/drivers/net/ethernet/ralink/soc_rt305x.c

@@ -133,6 +133,7 @@ static struct fe_soc_data rt3050_data = {
 	.checksum_bit = RX_DMA_L4VALID,
 	.rx_int = FE_RX_DONE_INT,
 	.tx_int = FE_TX_DONE_INT,
+	.status_int = FE_CNT_GDM_AF,
 };
 
 static struct fe_soc_data rt5350_data = {

target/linux/ramips/files/drivers/net/ethernet/ralink/soc_rt3883.c

@@ -63,6 +63,7 @@ static struct fe_soc_data rt3883_data = {
 	.pdma_glo_cfg = FE_PDMA_SIZE_8DWORDS,
 	.rx_int = FE_RX_DONE_INT,
 	.tx_int = FE_TX_DONE_INT,
+	.status_int = FE_CNT_GDM_AF,
 	.checksum_bit = RX_DMA_L4VALID,
 	.mdio_read = rt2880_mdio_read,
 	.mdio_write = rt2880_mdio_write,