From: John Crispin <john@openwrt.org>
Date: Fri, 13 Mar 2015 08:38:08 +0000 (+0000)
Subject: ralink: support change tx/rx ring size
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=d3f8bbc8f0b5f45e7de931168f8cc85fabb52e17;p=openwrt%2Fsvn-archive%2Farchive.git

ralink: support change tx/rx ring size

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

SVN-Revision: 44741
---

diff --git a/target/linux/ramips/files/drivers/net/ethernet/ralink/ralink_ethtool.c b/target/linux/ramips/files/drivers/net/ethernet/ralink/ralink_ethtool.c
index cbe5fadb1f..63356b1814 100644
--- a/target/linux/ramips/files/drivers/net/ethernet/ralink/ralink_ethtool.c
+++ b/target/linux/ramips/files/drivers/net/ethernet/ralink/ralink_ethtool.c
@@ -131,13 +131,36 @@ out_get_link:
 	return ethtool_op_get_link(dev);
 }
 
+static int fe_set_ringparam(struct net_device *dev,
+		struct ethtool_ringparam *ring)
+{
+	struct fe_priv *priv = netdev_priv(dev);
+
+	if ((ring->tx_pending < 2) ||
+			(ring->rx_pending < 2) ||
+			(ring->rx_pending > MAX_DMA_DESC) ||
+			(ring->tx_pending > MAX_DMA_DESC))
+		return -EINVAL;
+
+	dev->netdev_ops->ndo_stop(dev);
+
+	priv->tx_ring_size = BIT(fls(ring->tx_pending) - 1);
+	priv->rx_ring_size = BIT(fls(ring->rx_pending) - 1);
+
+	dev->netdev_ops->ndo_open(dev);
+
+	return 0;
+}
+
 static void fe_get_ringparam(struct net_device *dev,
 		struct ethtool_ringparam *ring)
 {
+	struct fe_priv *priv = netdev_priv(dev);
+
 	ring->rx_max_pending = MAX_DMA_DESC;
 	ring->tx_max_pending = MAX_DMA_DESC;
-	ring->rx_pending = NUM_DMA_DESC;
-	ring->tx_pending = NUM_DMA_DESC;
+	ring->rx_pending = priv->rx_ring_size;
+	ring->tx_pending = priv->tx_ring_size;
 }
 
 static void fe_get_strings(struct net_device *dev, u32 stringset, u8 *data)
@@ -194,6 +217,7 @@ static struct ethtool_ops fe_ethtool_ops = {
 	.set_msglevel		= fe_set_msglevel,
 	.nway_reset		= fe_nway_reset,
 	.get_link		= fe_get_link,
+	.set_ringparam		= fe_set_ringparam,
 	.get_ringparam		= fe_get_ringparam,
 };
 
diff --git a/target/linux/ramips/files/drivers/net/ethernet/ralink/ralink_soc_eth.c b/target/linux/ramips/files/drivers/net/ethernet/ralink/ralink_soc_eth.c
index c21643bbd3..f98af293c8 100644
--- a/target/linux/ramips/files/drivers/net/ethernet/ralink/ralink_soc_eth.c
+++ b/target/linux/ramips/files/drivers/net/ethernet/ralink/ralink_soc_eth.c
@@ -56,8 +56,8 @@
 
 #define TX_DMA_DESP2_DEF	(TX_DMA_LS0 | TX_DMA_DONE)
 #define TX_DMA_DESP4_DEF	(TX_DMA_QN(3) | TX_DMA_PN(1))
-#define NEXT_TX_DESP_IDX(X)	(((X) + 1) & (NUM_DMA_DESC - 1))
-#define NEXT_RX_DESP_IDX(X)	(((X) + 1) & (NUM_DMA_DESC - 1))
+#define NEXT_TX_DESP_IDX(X)	(((X) + 1) & (priv->tx_ring_size - 1))
+#define NEXT_RX_DESP_IDX(X)	(((X) + 1) & (priv->rx_ring_size - 1))
 
 #define SYSC_REG_RSTCTRL	0x34
 
@@ -204,7 +204,7 @@ static void fe_clean_rx(struct fe_priv *priv)
 	int i;
 
 	if (priv->rx_data) {
-		for (i = 0; i < NUM_DMA_DESC; i++)
+		for (i = 0; i < priv->rx_ring_size; i++)
 			if (priv->rx_data[i]) {
 				if (priv->rx_dma && priv->rx_dma[i].rxd1)
 					dma_unmap_single(&priv->netdev->dev,
@@ -220,7 +220,7 @@ static void fe_clean_rx(struct fe_priv *priv)
 
 	if (priv->rx_dma) {
 		dma_free_coherent(&priv->netdev->dev,
-				NUM_DMA_DESC * sizeof(*priv->rx_dma),
+				priv->rx_ring_size * sizeof(*priv->rx_dma),
 				priv->rx_dma,
 				priv->rx_phys);
 		priv->rx_dma = NULL;
@@ -232,19 +232,19 @@ static int fe_alloc_rx(struct fe_priv *priv)
 	struct net_device *netdev = priv->netdev;
 	int i, pad;
 
-	priv->rx_data = kcalloc(NUM_DMA_DESC, sizeof(*priv->rx_data),
+	priv->rx_data = kcalloc(priv->rx_ring_size, sizeof(*priv->rx_data),
 			GFP_KERNEL);
 	if (!priv->rx_data)
 		goto no_rx_mem;
 
-	for (i = 0; i < NUM_DMA_DESC; i++) {
+	for (i = 0; i < priv->rx_ring_size; i++) {
 		priv->rx_data[i] = netdev_alloc_frag(priv->frag_size);
 		if (!priv->rx_data[i])
 			goto no_rx_mem;
 	}
 
 	priv->rx_dma = dma_alloc_coherent(&netdev->dev,
-			NUM_DMA_DESC * sizeof(*priv->rx_dma),
+			priv->rx_ring_size * sizeof(*priv->rx_dma),
 			&priv->rx_phys,
 			GFP_ATOMIC | __GFP_ZERO);
 	if (!priv->rx_dma)
@@ -254,7 +254,7 @@ static int fe_alloc_rx(struct fe_priv *priv)
 		pad = 0;
 	else
 		pad = NET_IP_ALIGN;
-	for (i = 0; i < NUM_DMA_DESC; i++) {
+	for (i = 0; i < priv->rx_ring_size; i++) {
 		dma_addr_t dma_addr = dma_map_single(&netdev->dev,
 				priv->rx_data[i] + NET_SKB_PAD + pad,
 				priv->rx_buf_size,
@@ -271,8 +271,8 @@ static int fe_alloc_rx(struct fe_priv *priv)
 	wmb();
 
 	fe_reg_w32(priv->rx_phys, FE_REG_RX_BASE_PTR0);
-	fe_reg_w32(NUM_DMA_DESC, FE_REG_RX_MAX_CNT0);
-	fe_reg_w32((NUM_DMA_DESC - 1), FE_REG_RX_CALC_IDX0);
+	fe_reg_w32(priv->rx_ring_size, FE_REG_RX_MAX_CNT0);
+	fe_reg_w32((priv->rx_ring_size - 1), FE_REG_RX_CALC_IDX0);
 	fe_reg_w32(FE_PST_DRX_IDX0, FE_REG_PDMA_RST_CFG);
 
 	return 0;
@@ -312,7 +312,7 @@ static void fe_clean_tx(struct fe_priv *priv)
 	int i;
 
 	if (priv->tx_buf) {
-		for (i = 0; i < NUM_DMA_DESC; i++)
+		for (i = 0; i < priv->tx_ring_size; i++)
 			fe_txd_unmap(&priv->netdev->dev, &priv->tx_buf[i]);
 		kfree(priv->tx_buf);
 		priv->tx_buf = NULL;
@@ -320,7 +320,7 @@ static void fe_clean_tx(struct fe_priv *priv)
 
 	if (priv->tx_dma) {
 		dma_free_coherent(&priv->netdev->dev,
-				NUM_DMA_DESC * sizeof(*priv->tx_dma),
+				priv->tx_ring_size * sizeof(*priv->tx_dma),
 				priv->tx_dma,
 				priv->tx_phys);
 		priv->tx_dma = NULL;
@@ -333,19 +333,19 @@ static int fe_alloc_tx(struct fe_priv *priv)
 
 	priv->tx_free_idx = 0;
 
-	priv->tx_buf = kcalloc(NUM_DMA_DESC, sizeof(*priv->tx_buf),
+	priv->tx_buf = kcalloc(priv->tx_ring_size, sizeof(*priv->tx_buf),
 			GFP_KERNEL);
 	if (!priv->tx_buf)
 		goto no_tx_mem;
 
 	priv->tx_dma = dma_alloc_coherent(&priv->netdev->dev,
-			NUM_DMA_DESC * sizeof(*priv->tx_dma),
+			priv->tx_ring_size * sizeof(*priv->tx_dma),
 			&priv->tx_phys,
 			GFP_ATOMIC | __GFP_ZERO);
 	if (!priv->tx_dma)
 		goto no_tx_mem;
 
-	for (i = 0; i < NUM_DMA_DESC; i++) {
+	for (i = 0; i < priv->tx_ring_size; i++) {
 		if (priv->soc->tx_dma) {
 			priv->soc->tx_dma(&priv->tx_dma[i]);
 		}
@@ -354,7 +354,7 @@ static int fe_alloc_tx(struct fe_priv *priv)
 	wmb();
 
 	fe_reg_w32(priv->tx_phys, FE_REG_TX_BASE_PTR0);
-	fe_reg_w32(NUM_DMA_DESC, FE_REG_TX_MAX_CNT0);
+	fe_reg_w32(priv->tx_ring_size, FE_REG_TX_MAX_CNT0);
 	fe_reg_w32(0, FE_REG_TX_CTX_IDX0);
 	fe_reg_w32(FE_PST_DTX_IDX0, FE_REG_PDMA_RST_CFG);
 
@@ -702,8 +702,8 @@ static inline int fe_skb_padto(struct sk_buff *skb, struct fe_priv *priv) {
 
 static inline u32 fe_empty_txd(struct fe_priv *priv, u32 tx_fill_idx)
 {
-	return (u32)(NUM_DMA_DESC - ((tx_fill_idx - priv->tx_free_idx) &
-				(NUM_DMA_DESC - 1)));
+	return (u32)(priv->tx_ring_size - ((tx_fill_idx - priv->tx_free_idx) &
+				(priv->tx_ring_size - 1)));
 }
 
 static inline int fe_cal_txd_req(struct sk_buff *skb)
@@ -1481,16 +1481,15 @@ static int fe_probe(struct platform_device *pdev)
 	priv->msg_enable = netif_msg_init(fe_msg_level, FE_DEFAULT_MSG_ENABLE);
 	priv->frag_size = fe_max_frag_size(ETH_DATA_LEN);
 	priv->rx_buf_size = fe_max_buf_size(priv->frag_size);
-	if (priv->frag_size > PAGE_SIZE) {
-		dev_err(&pdev->dev, "error frag size.\n");
-		err = -EINVAL;
-		goto err_free_dev;
-	}
+	priv->tx_ring_size = priv->rx_ring_size = NUM_DMA_DESC;
 	INIT_WORK(&priv->pending_work, fe_pending_work);
 
 	napi_weight = 32;
-	if (priv->flags & FE_FLAG_NAPI_WEIGHT)
-		napi_weight = 64;
+	if (priv->flags & FE_FLAG_NAPI_WEIGHT) {
+		napi_weight *= 2;
+		priv->tx_ring_size *= 2;
+		priv->rx_ring_size *= 2;
+	}
 	netif_napi_add(netdev, &priv->rx_napi, fe_poll, napi_weight);
 	fe_set_ethtool_ops(netdev);
 
diff --git a/target/linux/ramips/files/drivers/net/ethernet/ralink/ralink_soc_eth.h b/target/linux/ramips/files/drivers/net/ethernet/ralink/ralink_soc_eth.h
index 9d5ea0ce58..2ad5d0130d 100644
--- a/target/linux/ramips/files/drivers/net/ethernet/ralink/ralink_soc_eth.h
+++ b/target/linux/ramips/files/drivers/net/ethernet/ralink/ralink_soc_eth.h
@@ -61,11 +61,7 @@ enum fe_work_flag {
 #define FE_DRV_VERSION		"0.1.2"
 
 /* power of 2 to let NEXT_TX_DESP_IDX work */
-#ifdef CONFIG_SOC_MT7621
-#define NUM_DMA_DESC		(1 << 9)
-#else
 #define NUM_DMA_DESC		(1 << 7)
-#endif
 #define MAX_DMA_DESC		0xfff
 
 #define FE_DELAY_EN_INT		0x80
@@ -493,6 +489,8 @@ struct fe_priv
 	unsigned long			vlan_map;
 	struct work_struct		pending_work;
 	DECLARE_BITMAP(pending_flags, FE_FLAG_MAX);
+	u16				tx_ring_size;
+	u16				rx_ring_size;
 };
 
 extern const struct of_device_id of_fe_match[];