diff --git a/drivers/net/ixgbe/ixgbe.h b/drivers/net/ixgbe/ixgbe.h
index b7e62d568b8563ab1a8d6f0f93f585bc9274287c..8d468028bb55d7c461d5f755c49c269ce8abfa7e 100644
--- a/drivers/net/ixgbe/ixgbe.h
+++ b/drivers/net/ixgbe/ixgbe.h
@@ -118,6 +118,7 @@ struct vf_data_storage {
bool pf_set_mac;
u16 pf_vlan; /* When set, guest VLAN config not allowed. */
u16 pf_qos;
+ u16 tx_rate;
};
/* wrapper around a pointer to a socket buffer,
@@ -468,6 +469,7 @@ struct ixgbe_adapter {
DECLARE_BITMAP(active_vfs, IXGBE_MAX_VF_FUNCTIONS);
unsigned int num_vfs;
struct vf_data_storage *vfinfo;
+ int vf_rate_link_speed;
};
enum ixbge_state_t {
diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index 38f9758c4c44d7dcce29b42fcc2961c8474ec9a2..f17e4a7ee731994c76037b6479555aa955f5fa1f 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -6217,6 +6217,7 @@ static void ixgbe_watchdog_task(struct work_struct *work)
(flow_tx ? "TX" : "None"))));
netif_carrier_on(netdev);
+ ixgbe_check_vf_rate_limit(adapter);
} else {
/* Force detection of hung controller */
for (i = 0; i < adapter->num_tx_queues; i++) {
diff --git a/drivers/net/ixgbe/ixgbe_sriov.c b/drivers/net/ixgbe/ixgbe_sriov.c
index 58c9b45989ff38c4477ed948aedcc7632578fb03..6e50d8328942dd58b7d1f8b1e414c6a0b95495d4 100644
--- a/drivers/net/ixgbe/ixgbe_sriov.c
+++ b/drivers/net/ixgbe/ixgbe_sriov.c
@@ -478,9 +478,90 @@ out:
return err;
}
+static int ixgbe_link_mbps(int internal_link_speed)
+{
+ switch (internal_link_speed) {
+ case IXGBE_LINK_SPEED_100_FULL:
+ return 100;
+ case IXGBE_LINK_SPEED_1GB_FULL:
+ return 1000;
+ case IXGBE_LINK_SPEED_10GB_FULL:
+ return 10000;
+ default:
+ return 0;
+ }
+}
+
+static void ixgbe_set_vf_rate_limit(struct ixgbe_hw *hw, int vf, int tx_rate,
+ int link_speed)
+{
+ int rf_dec, rf_int;
+ u32 bcnrc_val;
+
+ if (tx_rate != 0) {
+ /* Calculate the rate factor values to set */
+ rf_int = link_speed / tx_rate;
+ rf_dec = (link_speed - (rf_int * tx_rate));
+ rf_dec = (rf_dec * (1<<IXGBE_RTTBCNRC_RF_INT_SHIFT)) / tx_rate;
+
+ bcnrc_val = IXGBE_RTTBCNRC_RS_ENA;
+ bcnrc_val |= ((rf_int<<IXGBE_RTTBCNRC_RF_INT_SHIFT) &
+ IXGBE_RTTBCNRC_RF_INT_MASK);
+ bcnrc_val |= (rf_dec & IXGBE_RTTBCNRC_RF_DEC_MASK);
+ } else {
+ bcnrc_val = 0;
+ }
+
+ IXGBE_WRITE_REG(hw, IXGBE_RTTDQSEL, 2*vf); /* vf Y uses queue 2*Y */
+ IXGBE_WRITE_REG(hw, IXGBE_RTTBCNRC, bcnrc_val);
+}
+
+void ixgbe_check_vf_rate_limit(struct ixgbe_adapter *adapter)
+{
+ int actual_link_speed, i;
+ bool reset_rate = false;
+
+ /* VF Tx rate limit was not set */
+ if (adapter->vf_rate_link_speed == 0)
+ return;
+
+ actual_link_speed = ixgbe_link_mbps(adapter->link_speed);
+ if (actual_link_speed != adapter->vf_rate_link_speed) {
+ reset_rate = true;
+ adapter->vf_rate_link_speed = 0;
+ dev_info(&adapter->pdev->dev,
+ "Link speed has been changed. VF Transmit rate "
+ "is disabled\n");
+ }
+
+ for (i = 0; i < adapter->num_vfs; i++) {
+ if (reset_rate)
+ adapter->vfinfo[i].tx_rate = 0;
+
+ ixgbe_set_vf_rate_limit(&adapter->hw, i,
+ adapter->vfinfo[i].tx_rate,
+ actual_link_speed);
+ }
+}
+
int ixgbe_ndo_set_vf_bw(struct net_device *netdev, int vf, int tx_rate)
{
- return -EOPNOTSUPP;
+ struct ixgbe_adapter *adapter = netdev_priv(netdev);
+ struct ixgbe_hw *hw = &adapter->hw;
+ int actual_link_speed;
+
+ actual_link_speed = ixgbe_link_mbps(adapter->link_speed);
+ if ((vf >= adapter->num_vfs) || (!adapter->link_up) ||
+ (tx_rate > actual_link_speed) || (actual_link_speed != 10000) ||
+ ((tx_rate != 0) && (tx_rate <= 10)))
+ /* rate limit cannot be set to 10Mb or less in 10Gb adapters */
+ return -EINVAL;
+
+ adapter->vf_rate_link_speed = actual_link_speed;
+ adapter->vfinfo[vf].tx_rate = (u16)tx_rate;
+ ixgbe_set_vf_rate_limit(hw, vf, tx_rate, actual_link_speed);
+
+ return 0;
}
int ixgbe_ndo_get_vf_config(struct net_device *netdev,
@@ -491,7 +572,7 @@ int ixgbe_ndo_get_vf_config(struct net_device *netdev,
return -EINVAL;
ivi->vf = vf;
memcpy(&ivi->mac, adapter->vfinfo[vf].vf_mac_addresses, ETH_ALEN);
- ivi->tx_rate = 0;
+ ivi->tx_rate = adapter->vfinfo[vf].tx_rate;
ivi->vlan = adapter->vfinfo[vf].pf_vlan;
ivi->qos = adapter->vfinfo[vf].pf_qos;
return 0;
diff --git a/drivers/net/ixgbe/ixgbe_sriov.h b/drivers/net/ixgbe/ixgbe_sriov.h
index e7dd029d576ae4d6af1370f9aef0b3743a38b088..34175564bb78b75e034bceda257f7a3646994b23 100644
--- a/drivers/net/ixgbe/ixgbe_sriov.h
+++ b/drivers/net/ixgbe/ixgbe_sriov.h
@@ -40,6 +40,7 @@ int ixgbe_ndo_set_vf_vlan(struct net_device *netdev, int queue, u16 vlan,
int ixgbe_ndo_set_vf_bw(struct net_device *netdev, int vf, int tx_rate);
int ixgbe_ndo_get_vf_config(struct net_device *netdev,
int vf, struct ifla_vf_info *ivi);
+void ixgbe_check_vf_rate_limit(struct ixgbe_adapter *adapter);
#endif /* _IXGBE_SRIOV_H_ */
diff --git a/drivers/net/ixgbe/ixgbe_type.h b/drivers/net/ixgbe/ixgbe_type.h
index 63d862d3fd90280a09d89ffc30980dcc56343d60..25c1fb7eda060b0f4b6d2fd1ea91e45f4d7fe1e1 100644
--- a/drivers/net/ixgbe/ixgbe_type.h
+++ b/drivers/net/ixgbe/ixgbe_type.h
@@ -533,6 +533,12 @@
#define IXGBE_RTTDTECC 0x04990
#define IXGBE_RTTDTECC_NO_BCN 0x00000100
#define IXGBE_RTTBCNRC 0x04984
+#define IXGBE_RTTBCNRC_RS_ENA 0x80000000
+#define IXGBE_RTTBCNRC_RF_DEC_MASK 0x00003FFF
+#define IXGBE_RTTBCNRC_RF_INT_SHIFT 14
+#define IXGBE_RTTBCNRC_RF_INT_MASK \
+ (IXGBE_RTTBCNRC_RF_DEC_MASK << IXGBE_RTTBCNRC_RF_INT_SHIFT)
+
/* FCoE registers */
#define IXGBE_FCPTRL 0x02410 /* FC User Desc. PTR Low */