qlcnic: mac vlan learning support

Hypervisor allows, two VM's interfaces to have same mac address.
These VM's interfaces get differentiate with Vlan tag.
This patch add support to learn and configure mac+vlan filter on device.
Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/qlcnic/qlcnic.h

@@ -722,6 +722,8 @@ struct qlcnic_cardrsp_tx_ctx {
 #define QLCNIC_MAC_NOOP	0
 #define QLCNIC_MAC_ADD	1
 #define QLCNIC_MAC_DEL	2
+#define QLCNIC_MAC_VLAN_ADD	3
+#define QLCNIC_MAC_VLAN_DEL	4
 
 struct qlcnic_mac_list_s {
 	struct list_head list;
@@ -932,6 +934,7 @@ struct qlcnic_mac_req {
 struct qlcnic_filter {
 	struct hlist_node fnode;
 	u8 faddr[ETH_ALEN];
+	u16 vlan_id;
 	unsigned long ftime;
 };
 

drivers/net/qlcnic/qlcnic_hw.c

@@ -375,7 +375,7 @@ qlcnic_send_cmd_descs(struct qlcnic_adapter *adapter,
 
 static int
 qlcnic_sre_macaddr_change(struct qlcnic_adapter *adapter, u8 *addr,
-				unsigned op)
+				u16 vlan_id, unsigned op)
 {
 	struct qlcnic_nic_req req;
 	struct qlcnic_mac_req *mac_req;
@@ -391,6 +391,8 @@ qlcnic_sre_macaddr_change(struct qlcnic_adapter *adapter, u8 *addr,
 	mac_req->op = op;
 	memcpy(mac_req->mac_addr, addr, 6);
 
+	req.words[1] = cpu_to_le64(vlan_id);
+
 	return qlcnic_send_cmd_descs(adapter, (struct cmd_desc_type0 *)&req, 1);
 }
 
@@ -415,7 +417,7 @@ static int qlcnic_nic_add_mac(struct qlcnic_adapter *adapter, u8 *addr)
 	memcpy(cur->mac_addr, addr, ETH_ALEN);
 
 	if (qlcnic_sre_macaddr_change(adapter,
-				cur->mac_addr, QLCNIC_MAC_ADD)) {
+				cur->mac_addr, 0, QLCNIC_MAC_ADD)) {
 		kfree(cur);
 		return -EIO;
 	}
@@ -485,7 +487,7 @@ void qlcnic_free_mac_list(struct qlcnic_adapter *adapter)
 	while (!list_empty(head)) {
 		cur = list_entry(head->next, struct qlcnic_mac_list_s, list);
 		qlcnic_sre_macaddr_change(adapter,
-				cur->mac_addr, QLCNIC_MAC_DEL);
+				cur->mac_addr, 0, QLCNIC_MAC_DEL);
 		list_del(&cur->list);
 		kfree(cur);
 	}
@@ -506,7 +508,9 @@ void qlcnic_prune_lb_filters(struct qlcnic_adapter *adapter)
 			if (jiffies >
 				(QLCNIC_FILTER_AGE * HZ + tmp_fil->ftime)) {
 				qlcnic_sre_macaddr_change(adapter,
-					tmp_fil->faddr, QLCNIC_MAC_DEL);
+					tmp_fil->faddr, tmp_fil->vlan_id,
+					tmp_fil->vlan_id ? QLCNIC_MAC_VLAN_DEL :
+					QLCNIC_MAC_DEL);
 				spin_lock_bh(&adapter->mac_learn_lock);
 				adapter->fhash.fnum--;
 				hlist_del(&tmp_fil->fnode);
@@ -528,8 +532,9 @@ void qlcnic_delete_lb_filters(struct qlcnic_adapter *adapter)
 		head = &(adapter->fhash.fhead[i]);
 
 		hlist_for_each_entry_safe(tmp_fil, tmp_hnode, n, head, fnode) {
-			qlcnic_sre_macaddr_change(adapter,
-					tmp_fil->faddr, QLCNIC_MAC_DEL);
+			qlcnic_sre_macaddr_change(adapter, tmp_fil->faddr,
+				tmp_fil->vlan_id, tmp_fil->vlan_id ?
+				QLCNIC_MAC_VLAN_DEL :  QLCNIC_MAC_DEL);
 			spin_lock_bh(&adapter->mac_learn_lock);
 			adapter->fhash.fnum--;
 			hlist_del(&tmp_fil->fnode);

drivers/net/qlcnic/qlcnic_main.c

@@ -1826,7 +1826,7 @@ static void qlcnic_free_lb_filters_mem(struct qlcnic_adapter *adapter)
 }
 
 static void qlcnic_change_filter(struct qlcnic_adapter *adapter,
-		u64 uaddr, struct qlcnic_host_tx_ring *tx_ring)
+		u64 uaddr, u16 vlan_id, struct qlcnic_host_tx_ring *tx_ring)
 {
 	struct cmd_desc_type0 *hwdesc;
 	struct qlcnic_nic_req *req;
@@ -1845,9 +1845,11 @@ static void qlcnic_change_filter(struct qlcnic_adapter *adapter,
 	req->req_hdr = cpu_to_le64(word);
 
 	mac_req = (struct qlcnic_mac_req *)&(req->words[0]);
-	mac_req->op = QLCNIC_MAC_ADD;
+	mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
 	memcpy(mac_req->mac_addr, &uaddr, ETH_ALEN);
 
+	req->words[1] = cpu_to_le64(vlan_id);
+
 	tx_ring->producer = get_next_index(producer, tx_ring->num_desc);
 }
 
@@ -1865,6 +1867,7 @@ qlcnic_send_filter(struct qlcnic_adapter *adapter,
 	struct hlist_node *tmp_hnode, *n;
 	struct hlist_head *head;
 	u64 src_addr = 0;
+	u16 vlan_id = 0;
 	u8 hindex;
 
 	if (!compare_ether_addr(phdr->h_source, adapter->mac_addr))
@@ -1873,12 +1876,16 @@ qlcnic_send_filter(struct qlcnic_adapter *adapter,
 	if (adapter->fhash.fnum >= adapter->fhash.fmax)
 		return;
 
+	/* Only NPAR capable devices support vlan based learning*/
+	if (adapter->flags & QLCNIC_ESWITCH_ENABLED)
+		vlan_id = first_desc->vlan_TCI;
 	memcpy(&src_addr, phdr->h_source, ETH_ALEN);
 	hindex = QLCNIC_MAC_HASH(src_addr) & (QLCNIC_LB_MAX_FILTERS - 1);
 	head = &(adapter->fhash.fhead[hindex]);
 
 	hlist_for_each_entry_safe(tmp_fil, tmp_hnode, n, head, fnode) {
-		if (!memcmp(tmp_fil->faddr, &src_addr, ETH_ALEN)) {
+		if (!memcmp(tmp_fil->faddr, &src_addr, ETH_ALEN) &&
+			    tmp_fil->vlan_id == vlan_id) {
 			tmp_fil->ftime = jiffies;
 			return;
 		}
@@ -1888,9 +1895,10 @@ qlcnic_send_filter(struct qlcnic_adapter *adapter,
 	if (!fil)
 		return;
 
-	qlcnic_change_filter(adapter, src_addr, tx_ring);
+	qlcnic_change_filter(adapter, src_addr, vlan_id, tx_ring);
 
 	fil->ftime = jiffies;
+	fil->vlan_id = vlan_id;
 	memcpy(fil->faddr, &src_addr, ETH_ALEN);
 	spin_lock(&adapter->mac_learn_lock);
 	hlist_add_head(&(fil->fnode), head);