From: Jian Shen <shenjian15@huawei.com>
Date: Fri, 12 Oct 2018 15:34:04 +0100
Subject: net: hns3: Enable promisc mode when mac vlan table is full
Patch-mainline: v4.20-rc1
Git-commit: c60edc17df391e33c9c3cd6e319eb1f32ce26730
References: bsc#1104353 FATE#326415

Currently, the driver does nothing when mac vlan table is full.
In this case, the packet with new mac address will be dropped
by hardware. This patch adds check for the result of sync mac
address, and enable promisc mode when mac vlan table is full.
Furtherly, disable vlan filter when enable promisc by user
command.

Fixes: 46a3df9f9718 ("net: hns3: Add HNS3 Acceleration Engine & Compatibility Layer Support")
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/hisilicon/hns3/hnae3.h             |   11 ++
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c         |   78 +++++++++++++---
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.h         |    3 
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c |    9 +
 4 files changed, 89 insertions(+), 12 deletions(-)

--- a/drivers/net/ethernet/hisilicon/hns3/hnae3.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hnae3.h
@@ -503,6 +503,15 @@ struct hnae3_unic_private_info {
 #define HNAE3_SUPPORT_VF	      BIT(3)
 #define HNAE3_SUPPORT_SERDES_PARALLEL_LOOPBACK	BIT(4)
 
+#define HNAE3_USER_UPE		BIT(0)	/* unicast promisc enabled by user */
+#define HNAE3_USER_MPE		BIT(1)	/* mulitcast promisc enabled by user */
+#define HNAE3_BPE		BIT(2)	/* broadcast promisc enable */
+#define HNAE3_OVERFLOW_UPE	BIT(3)	/* unicast mac vlan overflow */
+#define HNAE3_OVERFLOW_MPE	BIT(4)	/* multicast mac vlan overflow */
+#define HNAE3_VLAN_FLTR		BIT(5)	/* enable vlan filter */
+#define HNAE3_UPE		(HNAE3_USER_UPE | HNAE3_OVERFLOW_UPE)
+#define HNAE3_MPE		(HNAE3_USER_MPE | HNAE3_OVERFLOW_MPE)
+
 struct hnae3_handle {
 	struct hnae3_client *client;
 	struct pci_dev *pdev;
@@ -521,6 +530,8 @@ struct hnae3_handle {
 	};
 
 	u32 numa_node_mask;	/* for multi-chip support */
+
+	u8 netdev_flags;
 };
 
 #define hnae3_set_field(origin, mask, shift, val) \
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -459,23 +459,81 @@ static int hns3_nic_mc_unsync(struct net
 	return 0;
 }
 
+static u8 hns3_get_netdev_flags(struct net_device *netdev)
+{
+	u8 flags = 0;
+
+	if (netdev->flags & IFF_PROMISC) {
+		flags = HNAE3_USER_UPE | HNAE3_USER_MPE;
+	} else {
+		flags |= HNAE3_VLAN_FLTR;
+		if (netdev->flags & IFF_ALLMULTI)
+			flags |= HNAE3_USER_MPE;
+	}
+
+	return flags;
+}
+
 static void hns3_nic_set_rx_mode(struct net_device *netdev)
 {
 	struct hnae3_handle *h = hns3_get_handle(netdev);
+	u8 new_flags;
+	int ret;
 
-	if (h->ae_algo->ops->set_promisc_mode) {
-		if (netdev->flags & IFF_PROMISC)
-			h->ae_algo->ops->set_promisc_mode(h, true, true);
-		else if (netdev->flags & IFF_ALLMULTI)
-			h->ae_algo->ops->set_promisc_mode(h, false, true);
-		else
-			h->ae_algo->ops->set_promisc_mode(h, false, false);
-	}
-	if (__dev_uc_sync(netdev, hns3_nic_uc_sync, hns3_nic_uc_unsync))
+	new_flags = hns3_get_netdev_flags(netdev);
+
+	ret = __dev_uc_sync(netdev, hns3_nic_uc_sync, hns3_nic_uc_unsync);
+	if (ret) {
 		netdev_err(netdev, "sync uc address fail\n");
+		if (ret == -ENOSPC)
+			new_flags |= HNAE3_OVERFLOW_UPE;
+	}
+
 	if (netdev->flags & IFF_MULTICAST) {
-		if (__dev_mc_sync(netdev, hns3_nic_mc_sync, hns3_nic_mc_unsync))
+		ret = __dev_mc_sync(netdev, hns3_nic_mc_sync,
+				    hns3_nic_mc_unsync);
+		if (ret) {
 			netdev_err(netdev, "sync mc address fail\n");
+			if (ret == -ENOSPC)
+				new_flags |= HNAE3_OVERFLOW_MPE;
+		}
+	}
+
+	hns3_update_promisc_mode(netdev, new_flags);
+	/* User mode Promisc mode enable and vlan filtering is disabled to
+	 * let all packets in. MAC-VLAN Table overflow Promisc enabled and
+	 * vlan fitering is enabled
+	 */
+	hns3_enable_vlan_filter(netdev, new_flags & HNAE3_VLAN_FLTR);
+	h->netdev_flags = new_flags;
+}
+
+void hns3_update_promisc_mode(struct net_device *netdev, u8 promisc_flags)
+{
+	struct hns3_nic_priv *priv = netdev_priv(netdev);
+	struct hnae3_handle *h = priv->ae_handle;
+
+	if (h->ae_algo->ops->set_promisc_mode) {
+		h->ae_algo->ops->set_promisc_mode(h,
+						  promisc_flags & HNAE3_UPE,
+						  promisc_flags & HNAE3_MPE);
+	}
+}
+
+void hns3_enable_vlan_filter(struct net_device *netdev, bool enable)
+{
+	struct hns3_nic_priv *priv = netdev_priv(netdev);
+	struct hnae3_handle *h = priv->ae_handle;
+	bool last_state;
+
+	if (h->pdev->revision >= 0x21 && h->ae_algo->ops->enable_vlan_filter) {
+		last_state = h->netdev_flags & HNAE3_VLAN_FLTR ? true : false;
+		if (enable != last_state) {
+			netdev_info(netdev,
+				    "%s vlan filter\n",
+				    enable ? "enable" : "disable");
+			h->ae_algo->ops->enable_vlan_filter(h, enable);
+		}
 	}
 }
 
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h
@@ -640,6 +640,9 @@ void hns3_set_vector_coalesce_tx_gl(stru
 void hns3_set_vector_coalesce_rl(struct hns3_enet_tqp_vector *tqp_vector,
 				 u32 rl_value);
 
+void hns3_enable_vlan_filter(struct net_device *netdev, bool enable);
+void hns3_update_promisc_mode(struct net_device *netdev, u8 promisc_flags);
+
 #ifdef CONFIG_HNS3_DCB
 void hns3_dcbnl_setup(struct hnae3_handle *handle);
 #else
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -5606,6 +5606,10 @@ static void hclge_enable_vlan_filter(str
 		hclge_set_vlan_filter_ctrl(hdev, HCLGE_FILTER_TYPE_VF,
 					   HCLGE_FILTER_FE_EGRESS_V1_B, enable);
 	}
+	if (enable)
+		handle->netdev_flags |= HNAE3_VLAN_FLTR;
+	else
+		handle->netdev_flags &= ~HNAE3_VLAN_FLTR;
 }
 
 static int hclge_set_vf_vlan_common(struct hclge_dev *hdev, int vfid,
@@ -5902,7 +5906,7 @@ static int hclge_init_vlan_config(struct
 {
 #define HCLGE_DEF_VLAN_TYPE		0x8100
 
-	struct hnae3_handle *handle;
+	struct hnae3_handle *handle = &hdev->vport[0].nic;
 	struct hclge_vport *vport;
 	int ret;
 	int i;
@@ -5925,6 +5929,8 @@ static int hclge_init_vlan_config(struct
 			return ret;
 	}
 
+	handle->netdev_flags |= HNAE3_VLAN_FLTR;
+
 	hdev->vlan_type_cfg.rx_in_fst_vlan_type = HCLGE_DEF_VLAN_TYPE;
 	hdev->vlan_type_cfg.rx_in_sec_vlan_type = HCLGE_DEF_VLAN_TYPE;
 	hdev->vlan_type_cfg.rx_ot_fst_vlan_type = HCLGE_DEF_VLAN_TYPE;
@@ -5969,7 +5975,6 @@ static int hclge_init_vlan_config(struct
 			return ret;
 	}
 
-	handle = &hdev->vport[0].nic;
 	return hclge_set_vlan_filter(handle, htons(ETH_P_8021Q), 0, false);
 }