enic: feature add: add ethtool -c/C support
Only rx_usec and tx_usec options for ethtool -C are settable as those
are the only settings that make sense to HW. Adds driver reporting of
intr coalescing timer value in usec units rather than HW units.
Signed-off-by: Vasanthy Kolluri <vkolluri@cisco.com>
Signed-off-by: Scott Feldman <scofeldm@cisco.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c
index 019b148..e56f416 100644
--- a/drivers/net/enic/enic_main.c
+++ b/drivers/net/enic/enic_main.c
@@ -261,6 +261,62 @@
enic->msg_enable = value;
}
+static int enic_get_coalesce(struct net_device *netdev,
+ struct ethtool_coalesce *ecmd)
+{
+ struct enic *enic = netdev_priv(netdev);
+
+ ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs;
+ ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs;
+
+ return 0;
+}
+
+static int enic_set_coalesce(struct net_device *netdev,
+ struct ethtool_coalesce *ecmd)
+{
+ struct enic *enic = netdev_priv(netdev);
+ u32 tx_coalesce_usecs;
+ u32 rx_coalesce_usecs;
+
+ tx_coalesce_usecs = min_t(u32,
+ INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
+ ecmd->tx_coalesce_usecs);
+ rx_coalesce_usecs = min_t(u32,
+ INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
+ ecmd->rx_coalesce_usecs);
+
+ switch (vnic_dev_get_intr_mode(enic->vdev)) {
+ case VNIC_DEV_INTR_MODE_INTX:
+ if (tx_coalesce_usecs != rx_coalesce_usecs)
+ return -EINVAL;
+
+ vnic_intr_coalescing_timer_set(&enic->intr[ENIC_INTX_WQ_RQ],
+ INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
+ break;
+ case VNIC_DEV_INTR_MODE_MSI:
+ if (tx_coalesce_usecs != rx_coalesce_usecs)
+ return -EINVAL;
+
+ vnic_intr_coalescing_timer_set(&enic->intr[0],
+ INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
+ break;
+ case VNIC_DEV_INTR_MODE_MSIX:
+ vnic_intr_coalescing_timer_set(&enic->intr[ENIC_MSIX_WQ],
+ INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
+ vnic_intr_coalescing_timer_set(&enic->intr[ENIC_MSIX_RQ],
+ INTR_COALESCE_USEC_TO_HW(rx_coalesce_usecs));
+ break;
+ default:
+ break;
+ }
+
+ enic->tx_coalesce_usecs = tx_coalesce_usecs;
+ enic->rx_coalesce_usecs = rx_coalesce_usecs;
+
+ return 0;
+}
+
static const struct ethtool_ops enic_ethtool_ops = {
.get_settings = enic_get_settings,
.get_drvinfo = enic_get_drvinfo,
@@ -278,6 +334,8 @@
.set_sg = ethtool_op_set_sg,
.get_tso = ethtool_op_get_tso,
.set_tso = enic_set_tso,
+ .get_coalesce = enic_get_coalesce,
+ .set_coalesce = enic_set_coalesce,
.get_flags = ethtool_op_get_flags,
.set_flags = ethtool_op_set_flags,
};
@@ -363,12 +421,12 @@
u32 mtu = vnic_dev_mtu(enic->vdev);
if (mtu && mtu != enic->port_mtu) {
+ enic->port_mtu = mtu;
if (mtu < enic->netdev->mtu)
printk(KERN_WARNING PFX
"%s: interface MTU (%d) set higher "
"than switch port MTU (%d)\n",
enic->netdev->name, enic->netdev->mtu, mtu);
- enic->port_mtu = mtu;
}
}
@@ -1990,6 +2048,9 @@
goto err_out_dev_deinit;
}
+ enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
+ enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
+
netdev->netdev_ops = &enic_netdev_ops;
netdev->watchdog_timeo = 2 * HZ;
netdev->ethtool_ops = &enic_ethtool_ops;