qlcnic: support port vlan id

On NIC Partition capable adapter, Administrator can configure to
tag packet with particular vlan id. Packet will be tagged and strip with
that vlan id. Also if 'Tagging' flag is disable, other packet will be drop.

Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 69 insertions, 20 deletions

diff --git a/drivers/net/qlcnic/qlcnic_main.c b/drivers/net/qlcnic/qlcnic_main.c
index 5d93b464681a..089212214ad4 100644
--- a/drivers/net/qlcnic/qlcnic_main.c
+++ b/drivers/net/qlcnic/qlcnic_main.c
@@ -759,6 +759,21 @@ qlcnic_check_options(struct qlcnic_adapter *adapter)
 }
 
 static void
+qlcnic_set_vlan_config(struct qlcnic_adapter *adapter,
+		struct qlcnic_esw_func_cfg *esw_cfg)
+{
+	if (esw_cfg->discard_tagged)
+		adapter->flags &= ~QLCNIC_TAGGING_ENABLED;
+	else
+		adapter->flags |= QLCNIC_TAGGING_ENABLED;
+
+	if (esw_cfg->vlan_id)
+		adapter->pvid = esw_cfg->vlan_id;
+	else
+		adapter->pvid = 0;
+}
+
+static void
 qlcnic_set_eswitch_port_features(struct qlcnic_adapter *adapter,
 		struct qlcnic_esw_func_cfg *esw_cfg)
 {
@@ -781,6 +796,7 @@ qlcnic_set_eswitch_port_config(struct qlcnic_adapter *adapter)
 	esw_cfg.pci_func = adapter->ahw.pci_func;
 	if (qlcnic_get_eswitch_port_config(adapter, &esw_cfg))
 			return -EIO;
+	qlcnic_set_vlan_config(adapter, &esw_cfg);
 	qlcnic_set_eswitch_port_features(adapter, &esw_cfg);
 
 	return 0;
@@ -1728,26 +1744,13 @@ qlcnic_tso_check(struct net_device *netdev,
 {
 	u8 opcode = TX_ETHER_PKT;
 	__be16 protocol = skb->protocol;
-	u16 flags = 0, vid = 0;
-	int copied, offset, copy_len, hdr_len = 0, tso = 0, vlan_oob = 0;
+	u16 flags = 0;
+	int copied, offset, copy_len, hdr_len = 0, tso = 0;
 	struct cmd_desc_type0 *hwdesc;
 	struct vlan_ethhdr *vh;
 	struct qlcnic_adapter *adapter = netdev_priv(netdev);
 	u32 producer = tx_ring->producer;
-
-	if (protocol == cpu_to_be16(ETH_P_8021Q)) {
-
-		vh = (struct vlan_ethhdr *)skb->data;
-		protocol = vh->h_vlan_encapsulated_proto;
-		flags = FLAGS_VLAN_TAGGED;
-
-	} else if (vlan_tx_tag_present(skb)) {
-
-		flags = FLAGS_VLAN_OOB;
-		vid = vlan_tx_tag_get(skb);
-		qlcnic_set_tx_vlan_tci(first_desc, vid);
-		vlan_oob = 1;
-	}
+	int vlan_oob = first_desc->flags_opcode & cpu_to_le16(FLAGS_VLAN_OOB);
 
 	if (*(skb->data) & BIT_0) {
 		flags |= BIT_0;
@@ -1818,7 +1821,7 @@ qlcnic_tso_check(struct net_device *netdev,
 		vh = (struct vlan_ethhdr *)((char *)hwdesc + 2);
 		skb_copy_from_linear_data(skb, vh, 12);
 		vh->h_vlan_proto = htons(ETH_P_8021Q);
-		vh->h_vlan_TCI = htons(vid);
+		vh->h_vlan_TCI = htons(first_desc->vlan_TCI);
 		skb_copy_from_linear_data_offset(skb, 12,
 				(char *)vh + 16, copy_len - 16);
 
@@ -1898,11 +1901,47 @@ out_err:
 	return -ENOMEM;
 }
 
+static int
+qlcnic_check_tx_tagging(struct qlcnic_adapter *adapter,
+			struct sk_buff *skb,
+			struct cmd_desc_type0 *first_desc)
+{
+	u8 opcode = 0;
+	u16 flags = 0;
+	__be16 protocol = skb->protocol;
+	struct vlan_ethhdr *vh;
+
+	if (protocol == cpu_to_be16(ETH_P_8021Q)) {
+		vh = (struct vlan_ethhdr *)skb->data;
+		protocol = vh->h_vlan_encapsulated_proto;
+		flags = FLAGS_VLAN_TAGGED;
+		qlcnic_set_tx_vlan_tci(first_desc, ntohs(vh->h_vlan_TCI));
+	} else if (vlan_tx_tag_present(skb)) {
+		flags = FLAGS_VLAN_OOB;
+		qlcnic_set_tx_vlan_tci(first_desc, vlan_tx_tag_get(skb));
+	}
+	if (unlikely(adapter->pvid)) {
+		if (first_desc->vlan_TCI &&
+				!(adapter->flags & QLCNIC_TAGGING_ENABLED))
+			return -EIO;
+		if (first_desc->vlan_TCI &&
+				(adapter->flags & QLCNIC_TAGGING_ENABLED))
+			goto set_flags;
+
+		flags = FLAGS_VLAN_OOB;
+		qlcnic_set_tx_vlan_tci(first_desc, adapter->pvid);
+	}
+set_flags:
+	qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
+	return 0;
+}
+
 static inline void
 qlcnic_clear_cmddesc(u64 *desc)
 {
 	desc[0] = 0ULL;
 	desc[2] = 0ULL;
+	desc[7] = 0ULL;
 }
 
 netdev_tx_t
@@ -1952,6 +1991,12 @@ qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
 
 	pdev = adapter->pdev;
 
+	first_desc = hwdesc = &tx_ring->desc_head[producer];
+	qlcnic_clear_cmddesc((u64 *)hwdesc);
+
+	if (qlcnic_check_tx_tagging(adapter, skb, first_desc))
+		goto drop_packet;
+
 	if (qlcnic_map_tx_skb(pdev, skb, pbuf)) {
 		adapter->stats.tx_dma_map_error++;
 		goto drop_packet;
@@ -1960,9 +2005,6 @@ qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
 	pbuf->skb = skb;
 	pbuf->frag_count = frag_count;
 
-	first_desc = hwdesc = &tx_ring->desc_head[producer];
-	qlcnic_clear_cmddesc((u64 *)hwdesc);
-
 	qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len);
 	qlcnic_set_tx_port(first_desc, adapter->portnum);
 
@@ -3349,6 +3391,13 @@ qlcnic_sysfs_write_esw_config(struct file *file, struct kobject *kobj,
 		case QLCNIC_PORT_DEFAULTS:
 			qlcnic_set_eswitch_port_features(adapter, &esw_cfg[i]);
 			break;
+		case QLCNIC_ADD_VLAN:
+			qlcnic_set_vlan_config(adapter, &esw_cfg[i]);
+			break;
+		case QLCNIC_DEL_VLAN:
+			esw_cfg[i].vlan_id = 0;
+			qlcnic_set_vlan_config(adapter, &esw_cfg[i]);
+			break;
 		}
 	}