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enic: allow adaptive coalesce setting for msi/legacy intr

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* Allow setting of adaptive coalescing setting for all types of interrupt.

* In msi & legacy intr, we use single interrupt for rx & tx. In this case
  tx_coalesce_usecs is invalid. We should use only rx_coalesce_usecs.
  Do not display tx_coal values for msi/intx. And do not allow user to set
  this as well.

* Driver supports only tx/rx_coalesce_usec and adaptive coalesce settings.
  For other values, driver does not return error. So ethtool succeeds for
  unsupported values. Introduce enic_coalesce_valid() function to validate
  the coalescing values.

* If user requests for coalesce value greater than what adaptor supports,
  driver uses the max value. We should at least log this.

Signed-off-by: Govindarajulu Varadarajan <_govind@gmx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Govindarajulu Varadarajan 2015-07-15 15:34:40 +05:30 committed by David S. Miller
parent fc865d6b4a
commit d9382bda4e
1 changed files with 65 additions and 48 deletions
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95
drivers/net/ethernet/cisco/enic/enic_ethtool.c
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@ -224,6 +224,7 @@ static int enic_get_coalesce(struct net_device *netdev,
struct enic *enic = netdev_priv(netdev);
struct enic_rx_coal *rxcoal = &enic->rx_coalesce_setting;
if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs;
ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs;
if (rxcoal->use_adaptive_rx_coalesce)
@ -234,6 +235,53 @@ static int enic_get_coalesce(struct net_device *netdev,
return 0;
}
static int enic_coalesce_valid(struct enic *enic,
struct ethtool_coalesce *ec)
{
u32 coalesce_usecs_max = vnic_dev_get_intr_coal_timer_max(enic->vdev);
u32 rx_coalesce_usecs_high = min_t(u32, coalesce_usecs_max,
ec->rx_coalesce_usecs_high);
u32 rx_coalesce_usecs_low = min_t(u32, coalesce_usecs_max,
ec->rx_coalesce_usecs_low);
if (ec->rx_max_coalesced_frames ||
ec->rx_coalesce_usecs_irq ||
ec->rx_max_coalesced_frames_irq ||
ec->tx_max_coalesced_frames ||
ec->tx_coalesce_usecs_irq ||
ec->tx_max_coalesced_frames_irq ||
ec->stats_block_coalesce_usecs ||
ec->use_adaptive_tx_coalesce ||
ec->pkt_rate_low ||
ec->rx_max_coalesced_frames_low ||
ec->tx_coalesce_usecs_low ||
ec->tx_max_coalesced_frames_low ||
ec->pkt_rate_high ||
ec->rx_max_coalesced_frames_high ||
ec->tx_coalesce_usecs_high ||
ec->tx_max_coalesced_frames_high ||
ec->rate_sample_interval)
return -EINVAL;
if ((vnic_dev_get_intr_mode(enic->vdev) != VNIC_DEV_INTR_MODE_MSIX) &&
ec->tx_coalesce_usecs)
return -EINVAL;
if ((ec->tx_coalesce_usecs > coalesce_usecs_max) ||
(ec->rx_coalesce_usecs > coalesce_usecs_max) ||
(ec->rx_coalesce_usecs_low > coalesce_usecs_max) ||
(ec->rx_coalesce_usecs_high > coalesce_usecs_max))
netdev_info(enic->netdev, "ethtool_set_coalesce: adaptor supports max coalesce value of %d. Setting max value.\n",
coalesce_usecs_max);
if (ec->rx_coalesce_usecs_high &&
(rx_coalesce_usecs_high <
rx_coalesce_usecs_low + ENIC_AIC_LARGE_PKT_DIFF))
return -EINVAL;
return 0;
}
static int enic_set_coalesce(struct net_device *netdev,
struct ethtool_coalesce *ecmd)
{
@ -244,8 +292,12 @@ static int enic_set_coalesce(struct net_device *netdev,
u32 rx_coalesce_usecs_high;
u32 coalesce_usecs_max;
unsigned int i, intr;
int ret;
struct enic_rx_coal *rxcoal = &enic->rx_coalesce_setting;
ret = enic_coalesce_valid(enic, ecmd);
if (ret)
return ret;
coalesce_usecs_max = vnic_dev_get_intr_coal_timer_max(enic->vdev);
tx_coalesce_usecs = min_t(u32, ecmd->tx_coalesce_usecs,
coalesce_usecs_max);
@ -257,59 +309,24 @@ static int enic_set_coalesce(struct net_device *netdev,
rx_coalesce_usecs_high = min_t(u32, ecmd->rx_coalesce_usecs_high,
coalesce_usecs_max);
switch (vnic_dev_get_intr_mode(enic->vdev)) {
case VNIC_DEV_INTR_MODE_INTX:
if (tx_coalesce_usecs != rx_coalesce_usecs)
return -EINVAL;
if (ecmd->use_adaptive_rx_coalesce ||
ecmd->rx_coalesce_usecs_low ||
ecmd->rx_coalesce_usecs_high)
return -EINVAL;
intr = enic_legacy_io_intr();
vnic_intr_coalescing_timer_set(&enic->intr[intr],
tx_coalesce_usecs);
break;
case VNIC_DEV_INTR_MODE_MSI:
if (tx_coalesce_usecs != rx_coalesce_usecs)
return -EINVAL;
if (ecmd->use_adaptive_rx_coalesce ||
ecmd->rx_coalesce_usecs_low ||
ecmd->rx_coalesce_usecs_high)
return -EINVAL;
vnic_intr_coalescing_timer_set(&enic->intr[0],
tx_coalesce_usecs);
break;
case VNIC_DEV_INTR_MODE_MSIX:
if (ecmd->rx_coalesce_usecs_high &&
(rx_coalesce_usecs_high <
rx_coalesce_usecs_low + ENIC_AIC_LARGE_PKT_DIFF))
return -EINVAL;
if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) {
for (i = 0; i < enic->wq_count; i++) {
intr = enic_msix_wq_intr(enic, i);
vnic_intr_coalescing_timer_set(&enic->intr[intr],
tx_coalesce_usecs);
}
rxcoal->use_adaptive_rx_coalesce =
!!ecmd->use_adaptive_rx_coalesce;
enic->tx_coalesce_usecs = tx_coalesce_usecs;
}
rxcoal->use_adaptive_rx_coalesce = !!ecmd->use_adaptive_rx_coalesce;
if (!rxcoal->use_adaptive_rx_coalesce)
enic_intr_coal_set_rx(enic, rx_coalesce_usecs);
if (ecmd->rx_coalesce_usecs_high) {
rxcoal->range_end = rx_coalesce_usecs_high;
rxcoal->small_pkt_range_start = rx_coalesce_usecs_low;
rxcoal->large_pkt_range_start = rx_coalesce_usecs_low +
ENIC_AIC_LARGE_PKT_DIFF;
}
break;
default:
break;
}
enic->tx_coalesce_usecs = tx_coalesce_usecs;
enic->rx_coalesce_usecs = rx_coalesce_usecs;
return 0;