@@ -770,4 +770,11 @@
#define E1000_PCIEMISC_LX_DECISION 0x00000080 /* Lx power decision based
on DMA coal */
+/* Tx Rate-Scheduler Config fields */
+#define E1000_RTTBCNRC_RS_ENA 0x80000000
+#define E1000_RTTBCNRC_RF_DEC_MASK 0x00003FFF
+#define E1000_RTTBCNRC_RF_INT_SHIFT 14
+#define E1000_RTTBCNRC_RF_INT_MASK \
+ (E1000_RTTBCNRC_RF_DEC_MASK << E1000_RTTBCNRC_RF_INT_SHIFT)
+
#endif
@@ -106,6 +106,10 @@
#define E1000_RQDPC(_n) (0x0C030 + ((_n) * 0x40))
+/* TX Rate Limit Registers */
+#define E1000_RTTDQSEL 0x3604 /* Tx Desc Plane Queue Select - WO */
+#define E1000_RTTBCNRC 0x36B0 /* Tx BCN Rate-Scheduler Config - WO */
+
/* Split and Replication RX Control - RW */
#define E1000_RXPBS 0x02404 /* Rx Packet Buffer Size - RW */
/*
@@ -77,6 +77,7 @@ struct vf_data_storage {
unsigned long last_nack;
u16 pf_vlan; /* When set, guest VLAN config not allowed. */
u16 pf_qos;
+ u16 tx_rate;
};
#define IGB_VF_FLAG_CTS 0x00000001 /* VF is clear to send data */
@@ -323,6 +324,7 @@ struct igb_adapter {
u16 rx_ring_count;
unsigned int vfs_allocated_count;
struct vf_data_storage *vf_data;
+ int vf_rate_link_speed;
u32 rss_queues;
u32 wvbr;
};
@@ -150,6 +150,7 @@ static int igb_ndo_set_vf_vlan(struct net_device *netdev,
static int igb_ndo_set_vf_bw(struct net_device *netdev, int vf, int tx_rate);
static int igb_ndo_get_vf_config(struct net_device *netdev, int vf,
struct ifla_vf_info *ivi);
+static void igb_check_vf_rate_limit(struct igb_adapter *);
#ifdef CONFIG_PM
static int igb_suspend(struct pci_dev *, pm_message_t);
@@ -3511,6 +3512,7 @@ static void igb_watchdog_task(struct work_struct *work)
netif_carrier_on(netdev);
igb_ping_all_vfs(adapter);
+ igb_check_vf_rate_limit(adapter);
/* link state has changed, schedule phy info update */
if (!test_bit(__IGB_DOWN, &adapter->state))
@@ -6599,9 +6601,91 @@ static int igb_ndo_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
return igb_set_vf_mac(adapter, vf, mac);
}
+static int igb_link_mbps(int internal_link_speed)
+{
+ switch (internal_link_speed) {
+ case SPEED_100:
+ return 100;
+ case SPEED_1000:
+ return 1000;
+ default:
+ return 0;
+ }
+}
+
+static void igb_set_vf_rate_limit(struct e1000_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<<E1000_RTTBCNRC_RF_INT_SHIFT)) / tx_rate;
+
+ bcnrc_val = E1000_RTTBCNRC_RS_ENA;
+ bcnrc_val |= ((rf_int<<E1000_RTTBCNRC_RF_INT_SHIFT) &
+ E1000_RTTBCNRC_RF_INT_MASK);
+ bcnrc_val |= (rf_dec & E1000_RTTBCNRC_RF_DEC_MASK);
+ } else {
+ bcnrc_val = 0;
+ }
+
+ wr32(E1000_RTTDQSEL, vf); /* vf X uses queue X */
+ wr32(E1000_RTTBCNRC, bcnrc_val);
+}
+
+static void igb_check_vf_rate_limit(struct igb_adapter *adapter)
+{
+ int actual_link_speed, i;
+ bool reset_rate = false;
+
+ /* VF TX rate limit was not set or not supported */
+ if ((adapter->vf_rate_link_speed == 0) ||
+ (adapter->hw.mac.type != e1000_82576))
+ return;
+
+ actual_link_speed = igb_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->vfs_allocated_count; i++) {
+ if (reset_rate)
+ adapter->vf_data[i].tx_rate = 0;
+
+ igb_set_vf_rate_limit(&adapter->hw, i,
+ adapter->vf_data[i].tx_rate,
+ actual_link_speed);
+ }
+}
+
static int igb_ndo_set_vf_bw(struct net_device *netdev, int vf, int tx_rate)
{
- return -EOPNOTSUPP;
+ struct igb_adapter *adapter = netdev_priv(netdev);
+ struct e1000_hw *hw = &adapter->hw;
+ int actual_link_speed;
+
+ if (hw->mac.type != e1000_82576)
+ return -EOPNOTSUPP;
+
+ actual_link_speed = igb_link_mbps(adapter->link_speed);
+ if ((vf >= adapter->vfs_allocated_count) ||
+ (!(rd32(E1000_STATUS) & E1000_STATUS_LU)) ||
+ (tx_rate < 0) || (tx_rate > actual_link_speed))
+ return -EINVAL;
+
+ adapter->vf_rate_link_speed = actual_link_speed;
+ adapter->vf_data[vf].tx_rate = (u16)tx_rate;
+ igb_set_vf_rate_limit(hw, vf, tx_rate, actual_link_speed);
+
+ return 0;
}
static int igb_ndo_get_vf_config(struct net_device *netdev,
@@ -6612,7 +6696,7 @@ static int igb_ndo_get_vf_config(struct net_device *netdev,
return -EINVAL;
ivi->vf = vf;
memcpy(&ivi->mac, adapter->vf_data[vf].vf_mac_addresses, ETH_ALEN);
- ivi->tx_rate = 0;
+ ivi->tx_rate = adapter->vf_data[vf].tx_rate;
ivi->vlan = adapter->vf_data[vf].pf_vlan;
ivi->qos = adapter->vf_data[vf].pf_qos;
return 0;