diff --git a/drivers/net/ethernet/xilinx/ll_temac.h b/drivers/net/ethernet/xilinx/ll_temac.h
index 463ef9eaf42dc..8777ec6e21c82 100644
--- a/drivers/net/ethernet/xilinx/ll_temac.h
+++ b/drivers/net/ethernet/xilinx/ll_temac.h
@@ -369,8 +369,10 @@ struct temac_local {
/* Buffer descriptors */
struct cdmac_bd *tx_bd_v;
dma_addr_t tx_bd_p;
+ u32 tx_bd_num;
struct cdmac_bd *rx_bd_v;
dma_addr_t rx_bd_p;
+ u32 rx_bd_num;
int tx_bd_ci;
int tx_bd_tail;
int rx_bd_ci;
diff --git a/drivers/net/ethernet/xilinx/ll_temac_main.c b/drivers/net/ethernet/xilinx/ll_temac_main.c
index d6853c44e672e..5735acb44b576 100644
--- a/drivers/net/ethernet/xilinx/ll_temac_main.c
+++ b/drivers/net/ethernet/xilinx/ll_temac_main.c
@@ -58,8 +58,11 @@
#include "ll_temac.h"
-#define TX_BD_NUM 64
-#define RX_BD_NUM 128
+/* Descriptors defines for Tx and Rx DMA */
+#define TX_BD_NUM_DEFAULT 64
+#define RX_BD_NUM_DEFAULT 1024
+#define TX_BD_NUM_MAX 4096
+#define RX_BD_NUM_MAX 4096
/* ---------------------------------------------------------------------
* Low level register access functions
@@ -301,7 +304,7 @@ static void temac_dma_bd_release(struct net_device *ndev)
/* Reset Local Link (DMA) */
lp->dma_out(lp, DMA_CONTROL_REG, DMA_CONTROL_RST);
- for (i = 0; i < RX_BD_NUM; i++) {
+ for (i = 0; i < lp->rx_bd_num; i++) {
if (!lp->rx_skb[i])
break;
else {
@@ -312,12 +315,12 @@ static void temac_dma_bd_release(struct net_device *ndev)
}
if (lp->rx_bd_v)
dma_free_coherent(ndev->dev.parent,
- sizeof(*lp->rx_bd_v) * RX_BD_NUM,
- lp->rx_bd_v, lp->rx_bd_p);
+ sizeof(*lp->rx_bd_v) * lp->rx_bd_num,
+ lp->rx_bd_v, lp->rx_bd_p);
if (lp->tx_bd_v)
dma_free_coherent(ndev->dev.parent,
- sizeof(*lp->tx_bd_v) * TX_BD_NUM,
- lp->tx_bd_v, lp->tx_bd_p);
+ sizeof(*lp->tx_bd_v) * lp->tx_bd_num,
+ lp->tx_bd_v, lp->tx_bd_p);
}
/**
@@ -330,33 +333,33 @@ static int temac_dma_bd_init(struct net_device *ndev)
dma_addr_t skb_dma_addr;
int i;
- lp->rx_skb = devm_kcalloc(&ndev->dev, RX_BD_NUM, sizeof(*lp->rx_skb),
- GFP_KERNEL);
+ lp->rx_skb = devm_kcalloc(&ndev->dev, lp->rx_bd_num,
+ sizeof(*lp->rx_skb), GFP_KERNEL);
if (!lp->rx_skb)
goto out;
/* allocate the tx and rx ring buffer descriptors. */
/* returns a virtual address and a physical address. */
lp->tx_bd_v = dma_alloc_coherent(ndev->dev.parent,
- sizeof(*lp->tx_bd_v) * TX_BD_NUM,
+ sizeof(*lp->tx_bd_v) * lp->tx_bd_num,
&lp->tx_bd_p, GFP_KERNEL);
if (!lp->tx_bd_v)
goto out;
lp->rx_bd_v = dma_alloc_coherent(ndev->dev.parent,
- sizeof(*lp->rx_bd_v) * RX_BD_NUM,
+ sizeof(*lp->rx_bd_v) * lp->rx_bd_num,
&lp->rx_bd_p, GFP_KERNEL);
if (!lp->rx_bd_v)
goto out;
- for (i = 0; i < TX_BD_NUM; i++) {
+ for (i = 0; i < lp->tx_bd_num; i++) {
lp->tx_bd_v[i].next = cpu_to_be32(lp->tx_bd_p
- + sizeof(*lp->tx_bd_v) * ((i + 1) % TX_BD_NUM));
+ + sizeof(*lp->tx_bd_v) * ((i + 1) % lp->tx_bd_num));
}
- for (i = 0; i < RX_BD_NUM; i++) {
+ for (i = 0; i < lp->rx_bd_num; i++) {
lp->rx_bd_v[i].next = cpu_to_be32(lp->rx_bd_p
- + sizeof(*lp->rx_bd_v) * ((i + 1) % RX_BD_NUM));
+ + sizeof(*lp->rx_bd_v) * ((i + 1) % lp->rx_bd_num));
skb = netdev_alloc_skb_ip_align(ndev,
XTE_MAX_JUMBO_FRAME_SIZE);
@@ -389,7 +392,7 @@ static int temac_dma_bd_init(struct net_device *ndev)
lp->tx_bd_ci = 0;
lp->tx_bd_tail = 0;
lp->rx_bd_ci = 0;
- lp->rx_bd_tail = RX_BD_NUM - 1;
+ lp->rx_bd_tail = lp->rx_bd_num - 1;
/* Enable RX DMA transfers */
wmb();
@@ -784,7 +787,7 @@ static void temac_start_xmit_done(struct net_device *ndev)
ndev->stats.tx_bytes += be32_to_cpu(cur_p->len);
lp->tx_bd_ci++;
- if (lp->tx_bd_ci >= TX_BD_NUM)
+ if (lp->tx_bd_ci >= lp->tx_bd_num)
lp->tx_bd_ci = 0;
cur_p = &lp->tx_bd_v[lp->tx_bd_ci];
@@ -810,7 +813,7 @@ static inline int temac_check_tx_bd_space(struct temac_local *lp, int num_frag)
return NETDEV_TX_BUSY;
tail++;
- if (tail >= TX_BD_NUM)
+ if (tail >= lp->tx_bd_num)
tail = 0;
cur_p = &lp->tx_bd_v[tail];
@@ -874,7 +877,7 @@ temac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
ptr_to_txbd((void *)skb, cur_p);
for (ii = 0; ii < num_frag; ii++) {
- if (++lp->tx_bd_tail >= TX_BD_NUM)
+ if (++lp->tx_bd_tail >= lp->tx_bd_num)
lp->tx_bd_tail = 0;
cur_p = &lp->tx_bd_v[lp->tx_bd_tail];
@@ -884,7 +887,7 @@ temac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
DMA_TO_DEVICE);
if (dma_mapping_error(ndev->dev.parent, skb_dma_addr)) {
if (--lp->tx_bd_tail < 0)
- lp->tx_bd_tail = TX_BD_NUM - 1;
+ lp->tx_bd_tail = lp->tx_bd_num - 1;
cur_p = &lp->tx_bd_v[lp->tx_bd_tail];
while (--ii >= 0) {
--frag;
@@ -893,7 +896,7 @@ temac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
skb_frag_size(frag),
DMA_TO_DEVICE);
if (--lp->tx_bd_tail < 0)
- lp->tx_bd_tail = TX_BD_NUM - 1;
+ lp->tx_bd_tail = lp->tx_bd_num - 1;
cur_p = &lp->tx_bd_v[lp->tx_bd_tail];
}
dma_unmap_single(ndev->dev.parent,
@@ -912,7 +915,7 @@ temac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
tail_p = lp->tx_bd_p + sizeof(*lp->tx_bd_v) * lp->tx_bd_tail;
lp->tx_bd_tail++;
- if (lp->tx_bd_tail >= TX_BD_NUM)
+ if (lp->tx_bd_tail >= lp->tx_bd_num)
lp->tx_bd_tail = 0;
skb_tx_timestamp(skb);
@@ -932,7 +935,7 @@ static int ll_temac_recv_buffers_available(struct temac_local *lp)
return 0;
available = 1 + lp->rx_bd_tail - lp->rx_bd_ci;
if (available <= 0)
- available += RX_BD_NUM;
+ available += lp->rx_bd_num;
return available;
}
@@ -1001,7 +1004,7 @@ static void ll_temac_recv(struct net_device *ndev)
ndev->stats.rx_bytes += length;
rx_bd = lp->rx_bd_ci;
- if (++lp->rx_bd_ci >= RX_BD_NUM)
+ if (++lp->rx_bd_ci >= lp->rx_bd_num)
lp->rx_bd_ci = 0;
} while (rx_bd != lp->rx_bd_tail);
@@ -1032,7 +1035,7 @@ static void ll_temac_recv(struct net_device *ndev)
dma_addr_t skb_dma_addr;
rx_bd = lp->rx_bd_tail + 1;
- if (rx_bd >= RX_BD_NUM)
+ if (rx_bd >= lp->rx_bd_num)
rx_bd = 0;
bd = &lp->rx_bd_v[rx_bd];
@@ -1248,13 +1251,52 @@ static const struct attribute_group temac_attr_group = {
.attrs = temac_device_attrs,
};
-/* ethtool support */
+/* ---------------------------------------------------------------------
+ * ethtool support
+ */
+
+static void ll_temac_ethtools_get_ringparam(struct net_device *ndev,
+ struct ethtool_ringparam *ering)
+{
+ struct temac_local *lp = netdev_priv(ndev);
+
+ ering->rx_max_pending = RX_BD_NUM_MAX;
+ ering->rx_mini_max_pending = 0;
+ ering->rx_jumbo_max_pending = 0;
+ ering->tx_max_pending = TX_BD_NUM_MAX;
+ ering->rx_pending = lp->rx_bd_num;
+ ering->rx_mini_pending = 0;
+ ering->rx_jumbo_pending = 0;
+ ering->tx_pending = lp->tx_bd_num;
+}
+
+static int ll_temac_ethtools_set_ringparam(struct net_device *ndev,
+ struct ethtool_ringparam *ering)
+{
+ struct temac_local *lp = netdev_priv(ndev);
+
+ if (ering->rx_pending > RX_BD_NUM_MAX ||
+ ering->rx_mini_pending ||
+ ering->rx_jumbo_pending ||
+ ering->rx_pending > TX_BD_NUM_MAX)
+ return -EINVAL;
+
+ if (netif_running(ndev))
+ return -EBUSY;
+
+ lp->rx_bd_num = ering->rx_pending;
+ lp->tx_bd_num = ering->tx_pending;
+ return 0;
+}
+
static const struct ethtool_ops temac_ethtool_ops = {
.nway_reset = phy_ethtool_nway_reset,
.get_link = ethtool_op_get_link,
.get_ts_info = ethtool_op_get_ts_info,
.get_link_ksettings = phy_ethtool_get_link_ksettings,
.set_link_ksettings = phy_ethtool_set_link_ksettings,
+ .get_ringparam = ll_temac_ethtools_get_ringparam,
+ .set_ringparam = ll_temac_ethtools_set_ringparam,
};
static int temac_probe(struct platform_device *pdev)
@@ -1298,6 +1340,8 @@ static int temac_probe(struct platform_device *pdev)
lp->ndev = ndev;
lp->dev = &pdev->dev;
lp->options = XTE_OPTION_DEFAULTS;
+ lp->rx_bd_num = RX_BD_NUM_DEFAULT;
+ lp->tx_bd_num = TX_BD_NUM_DEFAULT;
spin_lock_init(&lp->rx_lock);
INIT_DELAYED_WORK(&lp->restart_work, ll_temac_restart_work_func);