igb: add support for seperate tx-usecs setting in ethtool
This patch adds support for a seperate tx-usecs interrupt moderation setting
in ethtool which is supported when tx and rx interrupt vectors are sperated.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/igb/igb.h b/drivers/net/igb/igb.h
index 6c35c90..bef8cdc 100644
--- a/drivers/net/igb/igb.h
+++ b/drivers/net/igb/igb.h
@@ -249,8 +249,8 @@
unsigned int total_rx_bytes;
unsigned int total_rx_packets;
/* Interrupt Throttle Rate */
- u32 itr;
- u32 itr_setting;
+ u32 rx_itr_setting;
+ u32 tx_itr_setting;
u16 tx_itr;
u16 rx_itr;
@@ -321,6 +321,7 @@
#define IGB_FLAG_HAS_MSI (1 << 0)
#define IGB_FLAG_DCA_ENABLED (1 << 1)
#define IGB_FLAG_QUAD_PORT_A (1 << 2)
+#define IGB_FLAG_QUEUE_PAIRS (1 << 3)
enum e1000_state_t {
__IGB_TESTING,
diff --git a/drivers/net/igb/igb_ethtool.c b/drivers/net/igb/igb_ethtool.c
index 048a615..84fe25a 100644
--- a/drivers/net/igb/igb_ethtool.c
+++ b/drivers/net/igb/igb_ethtool.c
@@ -1827,18 +1827,37 @@
(ec->rx_coalesce_usecs == 2))
return -EINVAL;
+ if ((ec->tx_coalesce_usecs > IGB_MAX_ITR_USECS) ||
+ ((ec->tx_coalesce_usecs > 3) &&
+ (ec->tx_coalesce_usecs < IGB_MIN_ITR_USECS)) ||
+ (ec->tx_coalesce_usecs == 2))
+ return -EINVAL;
+
+ if ((adapter->flags & IGB_FLAG_QUEUE_PAIRS) && ec->tx_coalesce_usecs)
+ return -EINVAL;
+
/* convert to rate of irq's per second */
- if (ec->rx_coalesce_usecs && ec->rx_coalesce_usecs <= 3) {
- adapter->itr_setting = ec->rx_coalesce_usecs;
- adapter->itr = IGB_START_ITR;
- } else {
- adapter->itr_setting = ec->rx_coalesce_usecs << 2;
- adapter->itr = adapter->itr_setting;
- }
+ if (ec->rx_coalesce_usecs && ec->rx_coalesce_usecs <= 3)
+ adapter->rx_itr_setting = ec->rx_coalesce_usecs;
+ else
+ adapter->rx_itr_setting = ec->rx_coalesce_usecs << 2;
+
+ /* convert to rate of irq's per second */
+ if (adapter->flags & IGB_FLAG_QUEUE_PAIRS)
+ adapter->tx_itr_setting = adapter->rx_itr_setting;
+ else if (ec->tx_coalesce_usecs && ec->tx_coalesce_usecs <= 3)
+ adapter->tx_itr_setting = ec->tx_coalesce_usecs;
+ else
+ adapter->tx_itr_setting = ec->tx_coalesce_usecs << 2;
for (i = 0; i < adapter->num_q_vectors; i++) {
struct igb_q_vector *q_vector = adapter->q_vector[i];
- q_vector->itr_val = adapter->itr;
+ if (q_vector->rx_ring)
+ q_vector->itr_val = adapter->rx_itr_setting;
+ else
+ q_vector->itr_val = adapter->tx_itr_setting;
+ if (q_vector->itr_val && q_vector->itr_val <= 3)
+ q_vector->itr_val = IGB_START_ITR;
q_vector->set_itr = 1;
}
@@ -1850,15 +1869,21 @@
{
struct igb_adapter *adapter = netdev_priv(netdev);
- if (adapter->itr_setting <= 3)
- ec->rx_coalesce_usecs = adapter->itr_setting;
+ if (adapter->rx_itr_setting <= 3)
+ ec->rx_coalesce_usecs = adapter->rx_itr_setting;
else
- ec->rx_coalesce_usecs = adapter->itr_setting >> 2;
+ ec->rx_coalesce_usecs = adapter->rx_itr_setting >> 2;
+
+ if (!(adapter->flags & IGB_FLAG_QUEUE_PAIRS)) {
+ if (adapter->tx_itr_setting <= 3)
+ ec->tx_coalesce_usecs = adapter->tx_itr_setting;
+ else
+ ec->tx_coalesce_usecs = adapter->tx_itr_setting >> 2;
+ }
return 0;
}
-
static int igb_nway_reset(struct net_device *netdev)
{
struct igb_adapter *adapter = netdev_priv(netdev);
diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index c9fda11..5724ac8 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -734,6 +734,8 @@
dev_info(&adapter->pdev->dev, "IOV Disabled\n");
}
#endif
+ adapter->vfs_allocated_count = 0;
+ adapter->flags |= IGB_FLAG_QUEUE_PAIRS;
adapter->num_rx_queues = 1;
adapter->num_tx_queues = 1;
adapter->num_q_vectors = 1;
@@ -791,7 +793,9 @@
q_vector = adapter->q_vector[v_idx];
q_vector->rx_ring = &adapter->rx_ring[ring_idx];
q_vector->rx_ring->q_vector = q_vector;
- q_vector->itr_val = adapter->itr;
+ q_vector->itr_val = adapter->rx_itr_setting;
+ if (q_vector->itr_val && q_vector->itr_val <= 3)
+ q_vector->itr_val = IGB_START_ITR;
}
static void igb_map_tx_ring_to_vector(struct igb_adapter *adapter,
@@ -802,7 +806,9 @@
q_vector = adapter->q_vector[v_idx];
q_vector->tx_ring = &adapter->tx_ring[ring_idx];
q_vector->tx_ring->q_vector = q_vector;
- q_vector->itr_val = adapter->itr;
+ q_vector->itr_val = adapter->tx_itr_setting;
+ if (q_vector->itr_val && q_vector->itr_val <= 3)
+ q_vector->itr_val = IGB_START_ITR;
}
/**
@@ -1597,9 +1603,6 @@
hw->fc.requested_mode = e1000_fc_default;
hw->fc.current_mode = e1000_fc_default;
- adapter->itr_setting = IGB_DEFAULT_ITR;
- adapter->itr = IGB_START_ITR;
-
igb_validate_mdi_setting(hw);
/* Initial Wake on LAN setting If APM wake is enabled in the EEPROM,
@@ -1854,6 +1857,9 @@
adapter->tx_ring_count = IGB_DEFAULT_TXD;
adapter->rx_ring_count = IGB_DEFAULT_RXD;
+ adapter->rx_itr_setting = IGB_DEFAULT_ITR;
+ adapter->tx_itr_setting = IGB_DEFAULT_ITR;
+
adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
@@ -3052,7 +3058,6 @@
latency_invalid = 255
};
-
/**
* igb_update_ring_itr - update the dynamic ITR value based on packet size
*
@@ -3216,7 +3221,7 @@
current_itr = max(adapter->rx_itr, adapter->tx_itr);
/* conservative mode (itr 3) eliminates the lowest_latency setting */
- if (adapter->itr_setting == 3 && current_itr == lowest_latency)
+ if (adapter->rx_itr_setting == 3 && current_itr == lowest_latency)
current_itr = low_latency;
switch (current_itr) {
@@ -4577,7 +4582,8 @@
struct igb_adapter *adapter = q_vector->adapter;
struct e1000_hw *hw = &adapter->hw;
- if (adapter->itr_setting & 3) {
+ if ((q_vector->rx_ring && (adapter->rx_itr_setting & 3)) ||
+ (!q_vector->rx_ring && (adapter->tx_itr_setting & 3))) {
if (!adapter->msix_entries)
igb_set_itr(adapter);
else