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 cbe5fadb1ff9cbcd328b7aadbd8093211f05e172..63356b18143be6ffa7373c7eb0372f77a5d4553b 100644 (file)
--- 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 c21643bbd3b41381e54a8090df25042e6fb18d93..f98af293c83cc7342c2750a2e4f09fcf77efdcc1 100644 (file)
--- 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 9d5ea0ce5834a25782212255c9c45e1e940b85a5..2ad5d0130dbf020993d566e4544198d2d9e4c9ac 100644 (file)
--- 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[];