igb: support for VF configuration tools

Add support to the igb driver for VF configuration mechanisms through the
PF interface.

Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/igb/e1000_82575.h

@@ -219,6 +219,9 @@ struct e1000_adv_tx_context_desc {
 #define E1000_VLVF_LVLAN          0x00100000
 #define E1000_VLVF_VLANID_ENABLE  0x80000000
 
+#define E1000_VMVIR_VLANA_DEFAULT      0x40000000 /* Always use default VLAN */
+#define E1000_VMVIR_VLANA_NEVER        0x80000000 /* Never insert VLAN tag */
+
 #define E1000_IOVCTL 0x05BBC
 #define E1000_IOVCTL_REUSE_VFQ 0x00000001
 

drivers/net/igb/e1000_regs.h

@@ -310,6 +310,7 @@
 #define E1000_VMOLR(_n)        (0x05AD0 + (4 * (_n)))
 #define E1000_VLVF(_n)         (0x05D00 + (4 * (_n))) /* VLAN Virtual Machine
                                                        * Filter - RW */
+#define E1000_VMVIR(_n)        (0x03700 + (4 * (_n)))
 
 #define wr32(reg, value) (writel(value, hw->hw_addr + reg))
 #define rd32(reg) (readl(hw->hw_addr + reg))

drivers/net/igb/igb.h

@@ -75,11 +75,14 @@ struct vf_data_storage {
 	u16 vlans_enabled;
 	u32 flags;
 	unsigned long last_nack;
+	u16 pf_vlan; /* When set, guest VLAN config not allowed. */
+	u16 pf_qos;
 };
 
 #define IGB_VF_FLAG_CTS            0x00000001 /* VF is clear to send data */
 #define IGB_VF_FLAG_UNI_PROMISC    0x00000002 /* VF has unicast promisc */
 #define IGB_VF_FLAG_MULTI_PROMISC  0x00000004 /* VF has multicast promisc */
+#define IGB_VF_FLAG_PF_SET_MAC     0x00000008 /* PF has set MAC address */
 
 /* RX descriptor control thresholds.
  * PTHRESH - MAC will consider prefetch if it has fewer than this number of

drivers/net/igb/igb_main.c

@@ -133,6 +133,12 @@ static void igb_msg_task(struct igb_adapter *);
 static void igb_vmm_control(struct igb_adapter *);
 static int igb_set_vf_mac(struct igb_adapter *, int, unsigned char *);
 static void igb_restore_vf_multicasts(struct igb_adapter *adapter);
+static int igb_ndo_set_vf_mac(struct net_device *netdev, int vf, u8 *mac);
+static int igb_ndo_set_vf_vlan(struct net_device *netdev,
+			       int vf, u16 vlan, u8 qos);
+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);
 
 #ifdef CONFIG_PM
 static int igb_suspend(struct pci_dev *, pm_message_t);
@@ -1352,6 +1358,10 @@ static const struct net_device_ops igb_netdev_ops = {
 	.ndo_vlan_rx_register	= igb_vlan_rx_register,
 	.ndo_vlan_rx_add_vid	= igb_vlan_rx_add_vid,
 	.ndo_vlan_rx_kill_vid	= igb_vlan_rx_kill_vid,
+	.ndo_set_vf_mac		= igb_ndo_set_vf_mac,
+	.ndo_set_vf_vlan	= igb_ndo_set_vf_vlan,
+	.ndo_set_vf_tx_rate	= igb_ndo_set_vf_bw,
+	.ndo_get_vf_config	= igb_ndo_get_vf_config,
 #ifdef CONFIG_NET_POLL_CONTROLLER
 	.ndo_poll_controller	= igb_netpoll,
 #endif
@@ -2479,7 +2489,8 @@ static void igb_rlpml_set(struct igb_adapter *adapter)
 	wr32(E1000_RLPML, max_frame_size);
 }
 
-static inline void igb_set_vmolr(struct igb_adapter *adapter, int vfn)
+static inline void igb_set_vmolr(struct igb_adapter *adapter,
+				 int vfn, bool aupe)
 {
 	struct e1000_hw *hw = &adapter->hw;
 	u32 vmolr;
@@ -2492,8 +2503,11 @@ static inline void igb_set_vmolr(struct igb_adapter *adapter, int vfn)
 		return;
 
 	vmolr = rd32(E1000_VMOLR(vfn));
-	vmolr |= E1000_VMOLR_AUPE |        /* Accept untagged packets */
-	         E1000_VMOLR_STRVLAN;      /* Strip vlan tags */
+	vmolr |= E1000_VMOLR_STRVLAN;      /* Strip vlan tags */
+	if (aupe)
+		vmolr |= E1000_VMOLR_AUPE;        /* Accept untagged packets */
+	else
+		vmolr &= ~(E1000_VMOLR_AUPE); /* Tagged packets ONLY */
 
 	/* clear all bits that might not be set */
 	vmolr &= ~(E1000_VMOLR_BAM | E1000_VMOLR_RSSE);
@@ -2564,7 +2578,7 @@ void igb_configure_rx_ring(struct igb_adapter *adapter,
 	wr32(E1000_SRRCTL(reg_idx), srrctl);
 
 	/* set filtering for VMDQ pools */
-	igb_set_vmolr(adapter, reg_idx & 0x7);
+	igb_set_vmolr(adapter, reg_idx & 0x7, true);
 
 	/* enable receive descriptor fetching */
 	rxdctl = rd32(E1000_RXDCTL(reg_idx));
@@ -4490,10 +4504,57 @@ static s32 igb_vlvf_set(struct igb_adapter *adapter, u32 vid, bool add, u32 vf)
 				reg |= size;
 				wr32(E1000_VMOLR(vf), reg);
 			}
-			return 0;
 		}
 	}
-	return -1;
+	return 0;
+}
+
+static void igb_set_vmvir(struct igb_adapter *adapter, u32 vid, u32 vf)
+{
+	struct e1000_hw *hw = &adapter->hw;
+
+	if (vid)
+		wr32(E1000_VMVIR(vf), (vid | E1000_VMVIR_VLANA_DEFAULT));
+	else
+		wr32(E1000_VMVIR(vf), 0);
+}
+
+static int igb_ndo_set_vf_vlan(struct net_device *netdev,
+			       int vf, u16 vlan, u8 qos)
+{
+	int err = 0;
+	struct igb_adapter *adapter = netdev_priv(netdev);
+
+	if ((vf >= adapter->vfs_allocated_count) || (vlan > 4095) || (qos > 7))
+		return -EINVAL;
+	if (vlan || qos) {
+		err = igb_vlvf_set(adapter, vlan, !!vlan, vf);
+		if (err)
+			goto out;
+		igb_set_vmvir(adapter, vlan | (qos << VLAN_PRIO_SHIFT), vf);
+		igb_set_vmolr(adapter, vf, !vlan);
+		adapter->vf_data[vf].pf_vlan = vlan;
+		adapter->vf_data[vf].pf_qos = qos;
+		dev_info(&adapter->pdev->dev,
+			 "Setting VLAN %d, QOS 0x%x on VF %d\n", vlan, qos, vf);
+		if (test_bit(__IGB_DOWN, &adapter->state)) {
+			dev_warn(&adapter->pdev->dev,
+				 "The VF VLAN has been set,"
+				 " but the PF device is not up.\n");
+			dev_warn(&adapter->pdev->dev,
+				 "Bring the PF device up before"
+				 " attempting to use the VF device.\n");
+		}
+	} else {
+		igb_vlvf_set(adapter, adapter->vf_data[vf].pf_vlan,
+				   false, vf);
+		igb_set_vmvir(adapter, vlan, vf);
+		igb_set_vmolr(adapter, vf, true);
+		adapter->vf_data[vf].pf_vlan = 0;
+		adapter->vf_data[vf].pf_qos = 0;
+       }
+out:
+       return err;
 }
 
 static int igb_set_vf_vlan(struct igb_adapter *adapter, u32 *msgbuf, u32 vf)
@@ -4506,15 +4567,21 @@ static int igb_set_vf_vlan(struct igb_adapter *adapter, u32 *msgbuf, u32 vf)
 
 static inline void igb_vf_reset(struct igb_adapter *adapter, u32 vf)
 {
-	/* clear all flags */
-	adapter->vf_data[vf].flags = 0;
+	/* clear flags */
+	adapter->vf_data[vf].flags &= ~(IGB_VF_FLAG_PF_SET_MAC);
 	adapter->vf_data[vf].last_nack = jiffies;
 
 	/* reset offloads to defaults */
-	igb_set_vmolr(adapter, vf);
+	igb_set_vmolr(adapter, vf, true);
 
 	/* reset vlans for device */
 	igb_clear_vf_vfta(adapter, vf);
+	if (adapter->vf_data[vf].pf_vlan)
+		igb_ndo_set_vf_vlan(adapter->netdev, vf,
+				    adapter->vf_data[vf].pf_vlan,
+				    adapter->vf_data[vf].pf_qos);
+	else
+		igb_clear_vf_vfta(adapter, vf);
 
 	/* reset multicast table array for vf */
 	adapter->vf_data[vf].num_vf_mc_hashes = 0;
@@ -4528,7 +4595,8 @@ static void igb_vf_reset_event(struct igb_adapter *adapter, u32 vf)
 	unsigned char *vf_mac = adapter->vf_data[vf].vf_mac_addresses;
 
 	/* generate a new mac address as we were hotplug removed/added */
-	random_ether_addr(vf_mac);
+	if (!(adapter->vf_data[vf].flags & IGB_VF_FLAG_PF_SET_MAC))
+		random_ether_addr(vf_mac);
 
 	/* process remaining reset events */
 	igb_vf_reset(adapter, vf);
@@ -4641,7 +4709,10 @@ static void igb_rcv_msg_from_vf(struct igb_adapter *adapter, u32 vf)
 		retval = igb_set_vf_rlpml(adapter, msgbuf[1], vf);
 		break;
 	case E1000_VF_SET_VLAN:
-		retval = igb_set_vf_vlan(adapter, msgbuf, vf);
+		if (adapter->vf_data[vf].pf_vlan)
+			retval = -1;
+		else
+			retval = igb_set_vf_vlan(adapter, msgbuf, vf);
 		break;
 	default:
 		dev_err(&pdev->dev, "Unhandled Msg %08x\n", msgbuf[0]);
@@ -6003,6 +6074,43 @@ static int igb_set_vf_mac(struct igb_adapter *adapter,
 	return 0;
 }
 
+static int igb_ndo_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
+{
+	struct igb_adapter *adapter = netdev_priv(netdev);
+	if (!is_valid_ether_addr(mac) || (vf >= adapter->vfs_allocated_count))
+		return -EINVAL;
+	adapter->vf_data[vf].flags |= IGB_VF_FLAG_PF_SET_MAC;
+	dev_info(&adapter->pdev->dev, "setting MAC %pM on VF %d\n", mac, vf);
+	dev_info(&adapter->pdev->dev, "Reload the VF driver to make this"
+				      " change effective.");
+	if (test_bit(__IGB_DOWN, &adapter->state)) {
+		dev_warn(&adapter->pdev->dev, "The VF MAC address has been set,"
+			 " but the PF device is not up.\n");
+		dev_warn(&adapter->pdev->dev, "Bring the PF device up before"
+			 " attempting to use the VF device.\n");
+	}
+	return igb_set_vf_mac(adapter, vf, mac);
+}
+
+static int igb_ndo_set_vf_bw(struct net_device *netdev, int vf, int tx_rate)
+{
+	return -EOPNOTSUPP;
+}
+
+static int igb_ndo_get_vf_config(struct net_device *netdev,
+				 int vf, struct ifla_vf_info *ivi)
+{
+	struct igb_adapter *adapter = netdev_priv(netdev);
+	if (vf >= adapter->vfs_allocated_count)
+		return -EINVAL;
+	ivi->vf = vf;
+	memcpy(&ivi->mac, adapter->vf_data[vf].vf_mac_addresses, ETH_ALEN);
+	ivi->tx_rate = 0;
+	ivi->vlan = adapter->vf_data[vf].pf_vlan;
+	ivi->qos = adapter->vf_data[vf].pf_qos;
+	return 0;
+}
+
 static void igb_vmm_control(struct igb_adapter *adapter)
 {
 	struct e1000_hw *hw = &adapter->hw;