bnxt_en: Re-structure the bnxt_ntuple_filter structure.

With the new bnxt_l2_filter structure, we can now re-structure the
bnxt_ntuple_filter structure to point to the bnxt_l2_filter structure.
We eliminate the L2 ether address info from the ntuple filter structure
as we can get the information from the L2 filter structure.  Note that
the source L2 MAC address is no longer used.

Reviewed-by: Vasundhara Volam <[email protected]>
Reviewed-by: Andy Gospodarek <[email protected]>
Reviewed-by: Pavan Chebbi <[email protected]>
Signed-off-by: Michael Chan <[email protected]>
Reviewed-by: Simon Horman <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: Michael Chan

drivers/net/ethernet/broadcom/bnxt/bnxt.c

@@ -4804,6 +4804,7 @@ static void bnxt_free_ntp_fltrs(struct bnxt *bp, bool all)
 
 		head = &bp->ntp_fltr_hash_tbl[i];
 		hlist_for_each_entry_safe(fltr, tmp, head, base.hash) {
+			bnxt_del_l2_filter(bp, fltr->l2_fltr);
 			if (!all && (fltr->base.flags & BNXT_ACT_FUNC_DST))
 				continue;
 			hlist_del(&fltr->base.hash);
@@ -5373,6 +5374,20 @@ static struct bnxt_l2_filter *bnxt_lookup_l2_filter(struct bnxt *bp,
 	return fltr;
 }
 
+#ifdef CONFIG_RFS_ACCEL
+static struct bnxt_l2_filter *
+bnxt_lookup_l2_filter_from_key(struct bnxt *bp, struct bnxt_l2_key *key)
+{
+	struct bnxt_l2_filter *fltr;
+	u32 idx;
+
+	idx = jhash2(&key->filter_key, BNXT_L2_KEY_SIZE, bp->hash_seed) &
+	      BNXT_L2_FLTR_HASH_MASK;
+	fltr = bnxt_lookup_l2_filter(bp, key, idx);
+	return fltr;
+}
+#endif
+
 static int bnxt_init_l2_filter(struct bnxt *bp, struct bnxt_l2_filter *fltr,
 			       struct bnxt_l2_key *key, u32 idx)
 {
@@ -5432,7 +5447,6 @@ static int bnxt_hwrm_cfa_ntuple_filter_free(struct bnxt *bp,
 #define BNXT_NTP_FLTR_FLAGS					\
 	(CFA_NTUPLE_FILTER_ALLOC_REQ_ENABLES_L2_FILTER_ID |	\
 	 CFA_NTUPLE_FILTER_ALLOC_REQ_ENABLES_ETHERTYPE |	\
-	 CFA_NTUPLE_FILTER_ALLOC_REQ_ENABLES_SRC_MACADDR |	\
 	 CFA_NTUPLE_FILTER_ALLOC_REQ_ENABLES_IPADDR_TYPE |	\
 	 CFA_NTUPLE_FILTER_ALLOC_REQ_ENABLES_SRC_IPADDR |	\
 	 CFA_NTUPLE_FILTER_ALLOC_REQ_ENABLES_SRC_IPADDR_MASK |	\
@@ -5463,7 +5477,7 @@ static int bnxt_hwrm_cfa_ntuple_filter_alloc(struct bnxt *bp,
 	if (rc)
 		return rc;
 
-	l2_fltr = bp->vnic_info[0].l2_filters[fltr->l2_fltr_idx];
+	l2_fltr = fltr->l2_fltr;
 	req->l2_filter_id = l2_fltr->base.filter_id;
 
 
@@ -5478,7 +5492,6 @@ static int bnxt_hwrm_cfa_ntuple_filter_alloc(struct bnxt *bp,
 	req->enables = cpu_to_le32(BNXT_NTP_FLTR_FLAGS);
 
 	req->ethertype = htons(ETH_P_IP);
-	memcpy(req->src_macaddr, fltr->src_mac_addr, ETH_ALEN);
 	req->ip_addr_type = CFA_NTUPLE_FILTER_ALLOC_REQ_IP_ADDR_TYPE_IPV4;
 	req->ip_protocol = keys->basic.ip_proto;
 
@@ -13730,8 +13743,7 @@ static bool bnxt_fltr_match(struct bnxt_ntuple_filter *f1,
 
 	if (keys1->ports.ports == keys2->ports.ports &&
 	    keys1->control.flags == keys2->control.flags &&
-	    ether_addr_equal(f1->src_mac_addr, f2->src_mac_addr) &&
-	    ether_addr_equal(f1->dst_mac_addr, f2->dst_mac_addr))
+	    f1->l2_fltr == f2->l2_fltr)
 		return true;
 
 	return false;
@@ -13744,29 +13756,32 @@ static int bnxt_rx_flow_steer(struct net_device *dev, const struct sk_buff *skb,
 	struct bnxt_ntuple_filter *fltr, *new_fltr;
 	struct flow_keys *fkeys;
 	struct ethhdr *eth = (struct ethhdr *)skb_mac_header(skb);
-	int rc = 0, idx, bit_id, l2_idx = 0;
+	struct bnxt_l2_filter *l2_fltr;
+	int rc = 0, idx, bit_id;
 	struct hlist_head *head;
 	u32 flags;
 
-	if (!ether_addr_equal(dev->dev_addr, eth->h_dest)) {
-		struct bnxt_vnic_info *vnic = &bp->vnic_info[0];
-		int off = 0, j;
+	if (ether_addr_equal(dev->dev_addr, eth->h_dest)) {
+		l2_fltr = bp->vnic_info[0].l2_filters[0];
+		atomic_inc(&l2_fltr->refcnt);
+	} else {
+		struct bnxt_l2_key key;
 
-		netif_addr_lock_bh(dev);
-		for (j = 0; j < vnic->uc_filter_count; j++, off += ETH_ALEN) {
-			if (ether_addr_equal(eth->h_dest,
-					     vnic->uc_list + off)) {
-				l2_idx = j + 1;
-				break;
-			}
-		}
-		netif_addr_unlock_bh(dev);
-		if (!l2_idx)
+		ether_addr_copy(key.dst_mac_addr, eth->h_dest);
+		key.vlan = 0;
+		l2_fltr = bnxt_lookup_l2_filter_from_key(bp, &key);
+		if (!l2_fltr)
+			return -EINVAL;
+		if (l2_fltr->base.flags & BNXT_ACT_FUNC_DST) {
+			bnxt_del_l2_filter(bp, l2_fltr);
 			return -EINVAL;
+		}
 	}
 	new_fltr = kzalloc(sizeof(*new_fltr), GFP_ATOMIC);
-	if (!new_fltr)
+	if (!new_fltr) {
+		bnxt_del_l2_filter(bp, l2_fltr);
 		return -ENOMEM;
+	}
 
 	fkeys = &new_fltr->fkeys;
 	if (!skb_flow_dissect_flow_keys(skb, fkeys, 0)) {
@@ -13793,8 +13808,7 @@ static int bnxt_rx_flow_steer(struct net_device *dev, const struct sk_buff *skb,
 		goto err_free;
 	}
 
-	memcpy(new_fltr->dst_mac_addr, eth->h_dest, ETH_ALEN);
-	memcpy(new_fltr->src_mac_addr, eth->h_source, ETH_ALEN);
+	new_fltr->l2_fltr = l2_fltr;
 
 	idx = skb_get_hash_raw(skb) & BNXT_NTP_FLTR_HASH_MASK;
 	head = &bp->ntp_fltr_hash_tbl[idx];
@@ -13819,9 +13833,9 @@ static int bnxt_rx_flow_steer(struct net_device *dev, const struct sk_buff *skb,
 
 	new_fltr->base.sw_id = (u16)bit_id;
 	new_fltr->flow_id = flow_id;
-	new_fltr->l2_fltr_idx = l2_idx;
 	new_fltr->base.rxq = rxq_index;
 	new_fltr->base.type = BNXT_FLTR_TYPE_NTUPLE;
+	new_fltr->base.flags = BNXT_ACT_RING_DST;
 	hlist_add_head_rcu(&new_fltr->base.hash, head);
 	bp->ntp_fltr_count++;
 	spin_unlock_bh(&bp->ntp_fltr_lock);
@@ -13831,6 +13845,7 @@ static int bnxt_rx_flow_steer(struct net_device *dev, const struct sk_buff *skb,
 	return new_fltr->base.sw_id;
 
 err_free:
+	bnxt_del_l2_filter(bp, l2_fltr);
 	kfree(new_fltr);
 	return rc;
 }
@@ -13871,6 +13886,7 @@ static void bnxt_cfg_ntp_filters(struct bnxt *bp)
 				hlist_del_rcu(&fltr->base.hash);
 				bp->ntp_fltr_count--;
 				spin_unlock_bh(&bp->ntp_fltr_lock);
+				bnxt_del_l2_filter(bp, fltr->l2_fltr);
 				synchronize_rcu();
 				clear_bit(fltr->base.sw_id, bp->ntp_fltr_bmap);
 				kfree(fltr);

drivers/net/ethernet/broadcom/bnxt/bnxt.h

@@ -1355,10 +1355,8 @@ struct bnxt_filter_base {
 
 struct bnxt_ntuple_filter {
 	struct bnxt_filter_base	base;
-	u8			dst_mac_addr[ETH_ALEN];
-	u8			src_mac_addr[ETH_ALEN];
 	struct flow_keys	fkeys;
-	u8			l2_fltr_idx;
+	struct bnxt_l2_filter	*l2_fltr;
 	u32			flow_id;
 };