netxen: support for ethtool set ringparam
Add support for ethtool -G to tune rx and tx ring sizes
per interface basis.
This is only supported for NX3031 based cards.
Signed-off-by: Amit Kumar Salecha <amit@netxen.com>
Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/netxen/netxen_nic_ethtool.c b/drivers/net/netxen/netxen_nic_ethtool.c
index 80d286d..39a308c 100644
--- a/drivers/net/netxen/netxen_nic_ethtool.c
+++ b/drivers/net/netxen/netxen_nic_ethtool.c
@@ -490,7 +490,8 @@
}
static void
-netxen_nic_get_ringparam(struct net_device *dev, struct ethtool_ringparam *ring)
+netxen_nic_get_ringparam(struct net_device *dev,
+ struct ethtool_ringparam *ring)
{
struct netxen_adapter *adapter = netdev_priv(dev);
@@ -513,6 +514,62 @@
ring->rx_mini_pending = 0;
}
+static u32
+netxen_validate_ringparam(u32 val, u32 min, u32 max, char *r_name)
+{
+ u32 num_desc;
+ num_desc = max(val, min);
+ num_desc = min(num_desc, max);
+ num_desc = roundup_pow_of_two(num_desc);
+
+ if (val != num_desc) {
+ printk(KERN_INFO "%s: setting %s ring size %d instead of %d\n",
+ netxen_nic_driver_name, r_name, num_desc, val);
+ }
+
+ return num_desc;
+}
+
+static int
+netxen_nic_set_ringparam(struct net_device *dev,
+ struct ethtool_ringparam *ring)
+{
+ struct netxen_adapter *adapter = netdev_priv(dev);
+ u16 max_rcv_desc = MAX_RCV_DESCRIPTORS_10G;
+ u16 max_jumbo_desc = MAX_JUMBO_RCV_DESCRIPTORS_10G;
+ u16 num_rxd, num_jumbo_rxd, num_txd;
+
+ if (NX_IS_REVISION_P2(adapter->ahw.revision_id))
+ return -EOPNOTSUPP;
+
+ if (ring->rx_mini_pending)
+ return -EOPNOTSUPP;
+
+ if (adapter->ahw.port_type == NETXEN_NIC_GBE) {
+ max_rcv_desc = MAX_RCV_DESCRIPTORS_1G;
+ max_jumbo_desc = MAX_JUMBO_RCV_DESCRIPTORS_10G;
+ }
+
+ num_rxd = netxen_validate_ringparam(ring->rx_pending,
+ MIN_RCV_DESCRIPTORS, max_rcv_desc, "rx");
+
+ num_jumbo_rxd = netxen_validate_ringparam(ring->rx_jumbo_pending,
+ MIN_JUMBO_DESCRIPTORS, max_jumbo_desc, "rx jumbo");
+
+ num_txd = netxen_validate_ringparam(ring->tx_pending,
+ MIN_CMD_DESCRIPTORS, MAX_CMD_DESCRIPTORS, "tx");
+
+ if (num_rxd == adapter->num_rxd && num_txd == adapter->num_txd &&
+ num_jumbo_rxd == adapter->num_jumbo_rxd)
+ return 0;
+
+ adapter->num_rxd = num_rxd;
+ adapter->num_jumbo_rxd = num_jumbo_rxd;
+ adapter->num_txd = num_txd;
+
+ return netxen_nic_reset_context(adapter);
+}
+
static void
netxen_nic_get_pauseparam(struct net_device *dev,
struct ethtool_pauseparam *pause)
@@ -894,6 +951,7 @@
.get_eeprom_len = netxen_nic_get_eeprom_len,
.get_eeprom = netxen_nic_get_eeprom,
.get_ringparam = netxen_nic_get_ringparam,
+ .set_ringparam = netxen_nic_set_ringparam,
.get_pauseparam = netxen_nic_get_pauseparam,
.set_pauseparam = netxen_nic_set_pauseparam,
.set_tx_csum = ethtool_op_set_tx_csum,