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authorAlexander Duyck <alexander.h.duyck@intel.com>2013-01-12 06:33:52 +0000
committerJeff Kirsher <jeffrey.t.kirsher@intel.com>2013-02-15 22:47:51 -0800
commit5348c9dbf379dc5b70e3a6a4f2f79c2c43720b37 (patch)
tree4d0a0b045ef00feb235a935608dfd74237523b2d /drivers/net/ethernet/intel
parentcca73c59c414f15d02fac69c947a9efc15bca271 (diff)
ixgbe: Add support for displaying the number of Tx/Rx channels
This patch adds support for the ethtool get_channels operation. Since the ixgbe driver has to support DCB as well as the other modes the assumption I made here is that the number of channels in DCB modes refers to the number of queues per traffic class, not the number of queues total. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Reviewed-by: John Fastabend <john.r.fastabend@intel.com> Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel')
-rw-r--r--drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c72
1 files changed, 72 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
index db6735931d6..cba27c63ebb 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
@@ -2731,6 +2731,77 @@ static int ixgbe_get_ts_info(struct net_device *dev,
return 0;
}
+static unsigned int ixgbe_max_channels(struct ixgbe_adapter *adapter)
+{
+ unsigned int max_combined;
+ u8 tcs = netdev_get_num_tc(adapter->netdev);
+
+ if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
+ /* We only support one q_vector without MSI-X */
+ max_combined = 1;
+ } else if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
+ /* SR-IOV currently only allows one queue on the PF */
+ max_combined = 1;
+ } else if (tcs > 1) {
+ /* For DCB report channels per traffic class */
+ if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
+ /* 8 TC w/ 4 queues per TC */
+ max_combined = 4;
+ } else if (tcs > 4) {
+ /* 8 TC w/ 8 queues per TC */
+ max_combined = 8;
+ } else {
+ /* 4 TC w/ 16 queues per TC */
+ max_combined = 16;
+ }
+ } else if (adapter->atr_sample_rate) {
+ /* support up to 64 queues with ATR */
+ max_combined = IXGBE_MAX_FDIR_INDICES;
+ } else {
+ /* support up to 16 queues with RSS */
+ max_combined = IXGBE_MAX_RSS_INDICES;
+ }
+
+ return max_combined;
+}
+
+static void ixgbe_get_channels(struct net_device *dev,
+ struct ethtool_channels *ch)
+{
+ struct ixgbe_adapter *adapter = netdev_priv(dev);
+
+ /* report maximum channels */
+ ch->max_combined = ixgbe_max_channels(adapter);
+
+ /* report info for other vector */
+ if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
+ ch->max_other = NON_Q_VECTORS;
+ ch->other_count = NON_Q_VECTORS;
+ }
+
+ /* record RSS queues */
+ ch->combined_count = adapter->ring_feature[RING_F_RSS].indices;
+
+ /* nothing else to report if RSS is disabled */
+ if (ch->combined_count == 1)
+ return;
+
+ /* we do not support ATR queueing if SR-IOV is enabled */
+ if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
+ return;
+
+ /* same thing goes for being DCB enabled */
+ if (netdev_get_num_tc(dev) > 1)
+ return;
+
+ /* if ATR is disabled we can exit */
+ if (!adapter->atr_sample_rate)
+ return;
+
+ /* report flow director queues as maximum channels */
+ ch->combined_count = adapter->ring_feature[RING_F_FDIR].indices;
+}
+
static const struct ethtool_ops ixgbe_ethtool_ops = {
.get_settings = ixgbe_get_settings,
.set_settings = ixgbe_set_settings,
@@ -2759,6 +2830,7 @@ static const struct ethtool_ops ixgbe_ethtool_ops = {
.set_coalesce = ixgbe_set_coalesce,
.get_rxnfc = ixgbe_get_rxnfc,
.set_rxnfc = ixgbe_set_rxnfc,
+ .get_channels = ixgbe_get_channels,
.get_ts_info = ixgbe_get_ts_info,
};