cxgb4: add tc flower match support for tunnel VNI

Adds support for matching flows based on tunnel VNI value.
Introduces fw APIs for allocating/removing MPS entries related
to encapsulation. And uses the same while adding/deleting filters
for offloading flows based on tunnel VNI match.

Signed-off-by: Kumar Sanghvi <kumaras@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 85 insertions, 6 deletions

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_filter.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_filter.c
index aae980205ece..ac4d7f75fdc2 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_filter.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_filter.c
@@ -265,6 +265,8 @@ static int validate_filter(struct net_device *dev,
 			fs->mask.pfvf_vld) ||
 	    unsupported(fconf, VNIC_ID_F, fs->val.ovlan_vld,
 			fs->mask.ovlan_vld) ||
+	    unsupported(fconf, VNIC_ID_F, fs->val.encap_vld,
+			fs->mask.encap_vld) ||
 	    unsupported(fconf, VLAN_F, fs->val.ivlan_vld, fs->mask.ivlan_vld))
 		return -EOPNOTSUPP;
 
@@ -275,8 +277,12 @@ static int validate_filter(struct net_device *dev,
 	 * carries that overlap, we need to translate any PF/VF
 	 * specification into that internal format below.
 	 */
-	if (is_field_set(fs->val.pfvf_vld, fs->mask.pfvf_vld) &&
-	    is_field_set(fs->val.ovlan_vld, fs->mask.ovlan_vld))
+	if ((is_field_set(fs->val.pfvf_vld, fs->mask.pfvf_vld) &&
+	     is_field_set(fs->val.ovlan_vld, fs->mask.ovlan_vld)) ||
+	    (is_field_set(fs->val.pfvf_vld, fs->mask.pfvf_vld) &&
+	     is_field_set(fs->val.encap_vld, fs->mask.encap_vld)) ||
+	    (is_field_set(fs->val.ovlan_vld, fs->mask.ovlan_vld) &&
+	     is_field_set(fs->val.encap_vld, fs->mask.encap_vld)))
 		return -EOPNOTSUPP;
 	if (unsupported(iconf, VNIC_F, fs->val.pfvf_vld, fs->mask.pfvf_vld) ||
 	    (is_field_set(fs->val.ovlan_vld, fs->mask.ovlan_vld) &&
@@ -306,6 +312,9 @@ static int validate_filter(struct net_device *dev,
 	     fs->newvlan == VLAN_REWRITE))
 		return -EOPNOTSUPP;
 
+	if (fs->val.encap_vld &&
+	    CHELSIO_CHIP_VERSION(adapter->params.chip) < CHELSIO_T6)
+		return -EOPNOTSUPP;
 	return 0;
 }
 
@@ -705,6 +714,8 @@ int delete_filter(struct adapter *adapter, unsigned int fidx)
  */
 void clear_filter(struct adapter *adap, struct filter_entry *f)
 {
+	struct port_info *pi = netdev_priv(f->dev);
+
 	/* If the new or old filter have loopback rewriteing rules then we'll
 	 * need to free any existing L2T, SMT, CLIP entries of filter
 	 * rule.
@@ -715,6 +726,12 @@ void clear_filter(struct adapter *adap, struct filter_entry *f)
 	if (f->smt)
 		cxgb4_smt_release(f->smt);
 
+	if (f->fs.val.encap_vld && f->fs.val.ovlan_vld)
+		if (atomic_dec_and_test(&adap->mps_encap[f->fs.val.ovlan &
+							 0x1ff].refcnt))
+			t4_free_encap_mac_filt(adap, pi->viid,
+					       f->fs.val.ovlan & 0x1ff, 0);
+
 	if ((f->fs.hash || is_t6(adap->params.chip)) && f->fs.type)
 		cxgb4_clip_release(f->dev, (const u32 *)&f->fs.val.lip, 1);
 
@@ -840,6 +857,10 @@ bool is_filter_exact_match(struct adapter *adap,
 	if (!is_hashfilter(adap))
 		return false;
 
+	 /* Keep tunnel VNI match disabled for hash-filters for now */
+	if (fs->mask.encap_vld)
+		return false;
+
 	if (fs->type) {
 		if (is_inaddr_any(fs->val.fip, AF_INET6) ||
 		    !is_addr_all_mask(fs->mask.fip, AF_INET6))
@@ -961,8 +982,12 @@ static u64 hash_filter_ntuple(struct ch_filter_specification *fs,
 		ntuple |= (u64)(fs->val.tos) << tp->tos_shift;
 
 	if (tp->vnic_shift >= 0) {
-		if ((adap->params.tp.ingress_config & VNIC_F) &&
-		    fs->mask.pfvf_vld)
+		if ((adap->params.tp.ingress_config & USE_ENC_IDX_F) &&
+		    fs->mask.encap_vld)
+			ntuple |= (u64)((fs->val.encap_vld << 16) |
+					(fs->val.ovlan)) << tp->vnic_shift;
+		else if ((adap->params.tp.ingress_config & VNIC_F) &&
+			 fs->mask.pfvf_vld)
 			ntuple |= (u64)((fs->val.pfvf_vld << 16) |
 					(fs->val.pf << 13) |
 					(fs->val.vf)) << tp->vnic_shift;
@@ -1076,6 +1101,7 @@ static int cxgb4_set_hash_filter(struct net_device *dev,
 				 struct filter_ctx *ctx)
 {
 	struct adapter *adapter = netdev2adap(dev);
+	struct port_info *pi = netdev_priv(dev);
 	struct tid_info *t = &adapter->tids;
 	struct filter_entry *f;
 	struct sk_buff *skb;
@@ -1142,13 +1168,34 @@ static int cxgb4_set_hash_filter(struct net_device *dev,
 		f->fs.mask.ovlan = (fs->mask.pf << 13) | fs->mask.vf;
 		f->fs.val.ovlan_vld = fs->val.pfvf_vld;
 		f->fs.mask.ovlan_vld = fs->mask.pfvf_vld;
+	} else if (iconf & USE_ENC_IDX_F) {
+		if (f->fs.val.encap_vld) {
+			struct port_info *pi = netdev_priv(f->dev);
+			u8 match_all_mac[] = { 0, 0, 0, 0, 0, 0 };
+
+			/* allocate MPS TCAM entry */
+			ret = t4_alloc_encap_mac_filt(adapter, pi->viid,
+						      match_all_mac,
+						      match_all_mac,
+						      f->fs.val.vni,
+						      f->fs.mask.vni,
+						      0, 1, 1);
+			if (ret < 0)
+				goto free_atid;
+
+			atomic_inc(&adapter->mps_encap[ret].refcnt);
+			f->fs.val.ovlan = ret;
+			f->fs.mask.ovlan = 0xffff;
+			f->fs.val.ovlan_vld = 1;
+			f->fs.mask.ovlan_vld = 1;
+		}
 	}
 
 	size = sizeof(struct cpl_t6_act_open_req);
 	if (f->fs.type) {
 		ret = cxgb4_clip_get(f->dev, (const u32 *)&f->fs.val.lip, 1);
 		if (ret)
-			goto free_atid;
+			goto free_mps;
 
 		skb = alloc_skb(size, GFP_KERNEL);
 		if (!skb) {
@@ -1163,7 +1210,7 @@ static int cxgb4_set_hash_filter(struct net_device *dev,
 		skb = alloc_skb(size, GFP_KERNEL);
 		if (!skb) {
 			ret = -ENOMEM;
-			goto free_atid;
+			goto free_mps;
 		}
 
 		mk_act_open_req(f, skb,
@@ -1179,6 +1226,10 @@ static int cxgb4_set_hash_filter(struct net_device *dev,
 free_clip:
 	cxgb4_clip_release(f->dev, (const u32 *)&f->fs.val.lip, 1);
 
+free_mps:
+	if (f->fs.val.encap_vld && f->fs.val.ovlan_vld)
+		t4_free_encap_mac_filt(adapter, pi->viid, f->fs.val.ovlan, 1);
+
 free_atid:
 	cxgb4_free_atid(t, atid);
 
@@ -1360,6 +1411,27 @@ int __cxgb4_set_filter(struct net_device *dev, int filter_id,
 		f->fs.mask.ovlan = (fs->mask.pf << 13) | fs->mask.vf;
 		f->fs.val.ovlan_vld = fs->val.pfvf_vld;
 		f->fs.mask.ovlan_vld = fs->mask.pfvf_vld;
+	} else if (iconf & USE_ENC_IDX_F) {
+		if (f->fs.val.encap_vld) {
+			struct port_info *pi = netdev_priv(f->dev);
+			u8 match_all_mac[] = { 0, 0, 0, 0, 0, 0 };
+
+			/* allocate MPS TCAM entry */
+			ret = t4_alloc_encap_mac_filt(adapter, pi->viid,
+						      match_all_mac,
+						      match_all_mac,
+						      f->fs.val.vni,
+						      f->fs.mask.vni,
+						      0, 1, 1);
+			if (ret < 0)
+				goto free_clip;
+
+			atomic_inc(&adapter->mps_encap[ret].refcnt);
+			f->fs.val.ovlan = ret;
+			f->fs.mask.ovlan = 0x1ff;
+			f->fs.val.ovlan_vld = 1;
+			f->fs.mask.ovlan_vld = 1;
+		}
 	}
 
 	/* Attempt to set the filter.  If we don't succeed, we clear
@@ -1376,6 +1448,13 @@ int __cxgb4_set_filter(struct net_device *dev, int filter_id,
 	}
 
 	return ret;
+
+free_clip:
+	if (is_t6(adapter->params.chip) && f->fs.type)
+		cxgb4_clip_release(f->dev, (const u32 *)&f->fs.val.lip, 1);
+	cxgb4_clear_ftid(&adapter->tids, filter_id,
+			 fs->type ? PF_INET6 : PF_INET, chip_ver);
+	return ret;
 }
 
 static int cxgb4_del_hash_filter(struct net_device *dev, int filter_id,