ixgbe: Add PF support for VF promiscuous mode

This patch extends the xcast mailbox message to include support for
unicast promiscuous mode.  To allow a VF to enter this mode the PF
must be in promiscuous mode.

A later patch will add the support needed in the VF driver (ixgbevf)

Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/ixgbe/ixgbe.h

@@ -159,6 +159,7 @@ enum ixgbevf_xcast_modes {
 	IXGBEVF_XCAST_MODE_NONE = 0,
 	IXGBEVF_XCAST_MODE_MULTI,
 	IXGBEVF_XCAST_MODE_ALLMULTI,
+	IXGBEVF_XCAST_MODE_PROMISC,
 };
 
 struct vf_macvlans {

drivers/net/ethernet/intel/ixgbe/ixgbe_mbx.h

@@ -74,6 +74,7 @@ enum ixgbe_pfvf_api_rev {
 	ixgbe_mbox_api_20,	/* API version 2.0, solaris Phase1 VF driver */
 	ixgbe_mbox_api_11,	/* API version 1.1, linux/freebsd VF driver */
 	ixgbe_mbox_api_12,	/* API version 1.2, linux/freebsd VF driver */
+	ixgbe_mbox_api_13,	/* API version 1.3, linux/freebsd VF driver */
 	/* This value should always be last */
 	ixgbe_mbox_api_unknown,	/* indicates that API version is not known */
 };

drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c

@@ -512,6 +512,7 @@ static s32 ixgbe_set_vf_lpe(struct ixgbe_adapter *adapter, u32 *msgbuf, u32 vf)
 		switch (adapter->vfinfo[vf].vf_api) {
 		case ixgbe_mbox_api_11:
 		case ixgbe_mbox_api_12:
+		case ixgbe_mbox_api_13:
 			/*
 			 * Version 1.1 supports jumbo frames on VFs if PF has
 			 * jumbo frames enabled which means legacy VFs are
@@ -979,6 +980,7 @@ static int ixgbe_negotiate_vf_api(struct ixgbe_adapter *adapter,
 	case ixgbe_mbox_api_10:
 	case ixgbe_mbox_api_11:
 	case ixgbe_mbox_api_12:
+	case ixgbe_mbox_api_13:
 		adapter->vfinfo[vf].vf_api = api;
 		return 0;
 	default:
@@ -1003,6 +1005,7 @@ static int ixgbe_get_vf_queues(struct ixgbe_adapter *adapter,
 	case ixgbe_mbox_api_20:
 	case ixgbe_mbox_api_11:
 	case ixgbe_mbox_api_12:
+	case ixgbe_mbox_api_13:
 		break;
 	default:
 		return -1;
@@ -1042,8 +1045,13 @@ static int ixgbe_get_vf_reta(struct ixgbe_adapter *adapter, u32 *msgbuf, u32 vf)
 		return -EPERM;
 
 	/* verify the PF is supporting the correct API */
-	if (adapter->vfinfo[vf].vf_api != ixgbe_mbox_api_12)
+	switch (adapter->vfinfo[vf].vf_api) {
+	case ixgbe_mbox_api_13:
+	case ixgbe_mbox_api_12:
+		break;
+	default:
 		return -EOPNOTSUPP;
+	}
 
 	/* This mailbox command is supported (required) only for 82599 and x540
 	 * VFs which support up to 4 RSS queues. Therefore we will compress the
@@ -1069,8 +1077,13 @@ static int ixgbe_get_vf_rss_key(struct ixgbe_adapter *adapter,
 		return -EPERM;
 
 	/* verify the PF is supporting the correct API */
-	if (adapter->vfinfo[vf].vf_api != ixgbe_mbox_api_12)
+	switch (adapter->vfinfo[vf].vf_api) {
+	case ixgbe_mbox_api_13:
+	case ixgbe_mbox_api_12:
+		break;
+	default:
 		return -EOPNOTSUPP;
+	}
 
 	memcpy(rss_key, adapter->rss_key, sizeof(adapter->rss_key));
 
@@ -1082,11 +1095,16 @@ static int ixgbe_update_vf_xcast_mode(struct ixgbe_adapter *adapter,
 {
 	struct ixgbe_hw *hw = &adapter->hw;
 	int xcast_mode = msgbuf[1];
-	u32 vmolr, disable, enable;
+	u32 vmolr, fctrl, disable, enable;
 
 	/* verify the PF is supporting the correct APIs */
 	switch (adapter->vfinfo[vf].vf_api) {
 	case ixgbe_mbox_api_12:
+		/* promisc introduced in 1.3 version */
+		if (xcast_mode == IXGBEVF_XCAST_MODE_PROMISC)
+			return -EOPNOTSUPP;
+		/* Fall threw */
+	case ixgbe_mbox_api_13:
 		break;
 	default:
 		return -EOPNOTSUPP;
@@ -1102,17 +1120,34 @@ static int ixgbe_update_vf_xcast_mode(struct ixgbe_adapter *adapter,
 
 	switch (xcast_mode) {
 	case IXGBEVF_XCAST_MODE_NONE:
-		disable = IXGBE_VMOLR_BAM | IXGBE_VMOLR_ROMPE | IXGBE_VMOLR_MPE;
+		disable = IXGBE_VMOLR_BAM | IXGBE_VMOLR_ROMPE |
+			  IXGBE_VMOLR_MPE | IXGBE_VMOLR_UPE | IXGBE_VMOLR_VPE;
 		enable = 0;
 		break;
 	case IXGBEVF_XCAST_MODE_MULTI:
-		disable = IXGBE_VMOLR_MPE;
+		disable = IXGBE_VMOLR_MPE | IXGBE_VMOLR_UPE | IXGBE_VMOLR_VPE;
 		enable = IXGBE_VMOLR_BAM | IXGBE_VMOLR_ROMPE;
 		break;
 	case IXGBEVF_XCAST_MODE_ALLMULTI:
-		disable = 0;
+		disable = IXGBE_VMOLR_UPE | IXGBE_VMOLR_VPE;
 		enable = IXGBE_VMOLR_BAM | IXGBE_VMOLR_ROMPE | IXGBE_VMOLR_MPE;
 		break;
+	case IXGBEVF_XCAST_MODE_PROMISC:
+		if (hw->mac.type <= ixgbe_mac_82599EB)
+			return -EOPNOTSUPP;
+
+		fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
+		if (!(fctrl & IXGBE_FCTRL_UPE)) {
+			/* VF promisc requires PF in promisc */
+			e_warn(drv,
+			       "Enabling VF promisc requires PF in promisc\n");
+			return -EPERM;
+		}
+
+		disable = 0;
+		enable = IXGBE_VMOLR_BAM | IXGBE_VMOLR_ROMPE |
+			 IXGBE_VMOLR_MPE | IXGBE_VMOLR_UPE | IXGBE_VMOLR_VPE;
+		break;
 	default:
 		return -EOPNOTSUPP;
 	}

drivers/net/ethernet/intel/ixgbe/ixgbe_type.h

@@ -1501,6 +1501,8 @@ enum {
 #define IXGBE_VT_CTL_POOL_MASK  (0x3F << IXGBE_VT_CTL_POOL_SHIFT)
 
 /* VMOLR bitmasks */
+#define IXGBE_VMOLR_UPE		0x00400000 /* unicast promiscuous */
+#define IXGBE_VMOLR_VPE		0x00800000 /* VLAN promiscuous */
 #define IXGBE_VMOLR_AUPE        0x01000000 /* accept untagged packets */
 #define IXGBE_VMOLR_ROMPE       0x02000000 /* accept packets in MTA tbl */
 #define IXGBE_VMOLR_ROPE        0x04000000 /* accept packets in UC tbl */