Merge branch 'enic-update'

Govindarajulu Varadarajan says:

====================
enic update

This series adds support for IPv6 vxlan offload and UDP rss along with a
bug fix in filling the rq ring.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/cisco/enic/enic.h

@@ -33,7 +33,7 @@
 
 #define DRV_NAME		"enic"
 #define DRV_DESCRIPTION		"Cisco VIC Ethernet NIC Driver"
-#define DRV_VERSION		"2.3.0.45"
+#define DRV_VERSION		"2.3.0.53"
 #define DRV_COPYRIGHT		"Copyright 2008-2013 Cisco Systems, Inc"
 
 #define ENIC_BARS_MAX		6
@@ -140,6 +140,7 @@ struct enic_rfs_flw_tbl {
 struct vxlan_offload {
 	u16 vxlan_udp_port_number;
 	u8 patch_level;
+	u8 flags;
 };
 
 /* Per-instance private data structure */

drivers/net/ethernet/cisco/enic/enic_ethtool.c

@@ -474,6 +474,39 @@ static int enic_grxclsrule(struct enic *enic, struct ethtool_rxnfc *cmd)
 	return 0;
 }
 
+static int enic_get_rx_flow_hash(struct enic *enic, struct ethtool_rxnfc *cmd)
+{
+	cmd->data = 0;
+
+	switch (cmd->flow_type) {
+	case TCP_V6_FLOW:
+	case TCP_V4_FLOW:
+		cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
+		/* Fall through */
+	case UDP_V6_FLOW:
+	case UDP_V4_FLOW:
+		if (vnic_dev_capable_udp_rss(enic->vdev))
+			cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
+		/* Fall through */
+	case SCTP_V4_FLOW:
+	case AH_ESP_V4_FLOW:
+	case AH_V4_FLOW:
+	case ESP_V4_FLOW:
+	case SCTP_V6_FLOW:
+	case AH_ESP_V6_FLOW:
+	case AH_V6_FLOW:
+	case ESP_V6_FLOW:
+	case IPV4_FLOW:
+	case IPV6_FLOW:
+		cmd->data |= RXH_IP_SRC | RXH_IP_DST;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
 static int enic_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
 			  u32 *rule_locs)
 {
@@ -500,6 +533,9 @@ static int enic_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
 		ret = enic_grxclsrule(enic, cmd);
 		spin_unlock_bh(&enic->rfs_h.lock);
 		break;
+	case ETHTOOL_GRXFH:
+		ret = enic_get_rx_flow_hash(enic, cmd);
+		break;
 	default:
 		ret = -EOPNOTSUPP;
 		break;

drivers/net/ethernet/cisco/enic/enic_main.c

@@ -191,8 +191,16 @@ static void enic_udp_tunnel_add(struct net_device *netdev,
 		goto error;
 	}
 
-	if (ti->sa_family != AF_INET) {
-		netdev_info(netdev, "vxlan: only IPv4 offload supported");
+	switch (ti->sa_family) {
+	case AF_INET6:
+		if (!(enic->vxlan.flags & ENIC_VXLAN_OUTER_IPV6)) {
+			netdev_info(netdev, "vxlan: only IPv4 offload supported");
+			goto error;
+		}
+		/* Fall through */
+	case AF_INET:
+		break;
+	default:
 		goto error;
 	}
 
@@ -204,6 +212,11 @@ static void enic_udp_tunnel_add(struct net_device *netdev,
 
 		goto error;
 	}
+	if ((vnic_dev_get_res_count(enic->vdev, RES_TYPE_WQ) != 1) &&
+	    !(enic->vxlan.flags & ENIC_VXLAN_MULTI_WQ)) {
+		netdev_info(netdev, "vxlan: vxlan offload with multi wq not supported on this adapter");
+		goto error;
+	}
 
 	err = vnic_dev_overlay_offload_cfg(enic->vdev,
 					   OVERLAY_CFG_VXLAN_PORT_UPDATE,
@@ -271,22 +284,37 @@ static netdev_features_t enic_features_check(struct sk_buff *skb,
 	struct enic *enic = netdev_priv(dev);
 	struct udphdr *udph;
 	u16 port = 0;
-	u16 proto;
+	u8 proto;
 
 	if (!skb->encapsulation)
 		return features;
 
 	features = vxlan_features_check(skb, features);
 
-	/* hardware only supports IPv4 vxlan tunnel */
-	if (vlan_get_protocol(skb) != htons(ETH_P_IP))
+	switch (vlan_get_protocol(skb)) {
+	case htons(ETH_P_IPV6):
+		if (!(enic->vxlan.flags & ENIC_VXLAN_OUTER_IPV6))
+			goto out;
+		proto = ipv6_hdr(skb)->nexthdr;
+		break;
+	case htons(ETH_P_IP):
+		proto = ip_hdr(skb)->protocol;
+		break;
+	default:
 		goto out;
+	}
 
-	/* hardware does not support offload of ipv6 inner pkt */
-	if (eth->h_proto != ntohs(ETH_P_IP))
+	switch (eth->h_proto) {
+	case ntohs(ETH_P_IPV6):
+		if (!(enic->vxlan.flags & ENIC_VXLAN_INNER_IPV6))
+			goto out;
+		/* Fall through */
+	case ntohs(ETH_P_IP):
+		break;
+	default:
 		goto out;
+	}
 
-	proto = ip_hdr(skb)->protocol;
 
 	if (proto == IPPROTO_UDP) {
 		udph = udp_hdr(skb);
@@ -635,12 +663,25 @@ static int enic_queue_wq_skb_csum_l4(struct enic *enic, struct vnic_wq *wq,
 
 static void enic_preload_tcp_csum_encap(struct sk_buff *skb)
 {
-	if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
+	const struct ethhdr *eth = (struct ethhdr *)skb_inner_mac_header(skb);
+
+	switch (eth->h_proto) {
+	case ntohs(ETH_P_IP):
 		inner_ip_hdr(skb)->check = 0;
 		inner_tcp_hdr(skb)->check =
 			~csum_tcpudp_magic(inner_ip_hdr(skb)->saddr,
 					   inner_ip_hdr(skb)->daddr, 0,
 					   IPPROTO_TCP, 0);
+		break;
+	case ntohs(ETH_P_IPV6):
+		inner_tcp_hdr(skb)->check =
+			~csum_ipv6_magic(&inner_ipv6_hdr(skb)->saddr,
+					 &inner_ipv6_hdr(skb)->daddr, 0,
+					 IPPROTO_TCP, 0);
+		break;
+	default:
+		WARN_ONCE(1, "Non ipv4/ipv6 inner pkt for encap offload");
+		break;
 	}
 }
 
@@ -1898,6 +1939,8 @@ static int enic_open(struct net_device *netdev)
 	}
 
 	for (i = 0; i < enic->rq_count; i++) {
+		/* enable rq before updating rq desc */
+		vnic_rq_enable(&enic->rq[i]);
 		vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
 		/* Need at least one buffer on ring to get going */
 		if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
@@ -1909,8 +1952,6 @@ static int enic_open(struct net_device *netdev)
 
 	for (i = 0; i < enic->wq_count; i++)
 		vnic_wq_enable(&enic->wq[i]);
-	for (i = 0; i < enic->rq_count; i++)
-		vnic_rq_enable(&enic->rq[i]);
 
 	if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
 		enic_dev_add_station_addr(enic);
@@ -1936,8 +1977,12 @@ static int enic_open(struct net_device *netdev)
 	return 0;
 
 err_out_free_rq:
-	for (i = 0; i < enic->rq_count; i++)
+	for (i = 0; i < enic->rq_count; i++) {
+		err = vnic_rq_disable(&enic->rq[i]);
+		if (err)
+			return err;
 		vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
+	}
 	enic_dev_notify_unset(enic);
 err_out_free_intr:
 	enic_unset_affinity_hint(enic);
@@ -2151,9 +2196,10 @@ static int enic_dev_wait(struct vnic_dev *vdev,
 static int enic_dev_open(struct enic *enic)
 {
 	int err;
+	u32 flags = CMD_OPENF_IG_DESCCACHE;
 
 	err = enic_dev_wait(enic->vdev, vnic_dev_open,
-		vnic_dev_open_done, 0);
+		vnic_dev_open_done, flags);
 	if (err)
 		dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
 			err);
@@ -2275,7 +2321,7 @@ static int enic_set_rss_nic_cfg(struct enic *enic)
 {
 	struct device *dev = enic_get_dev(enic);
 	const u8 rss_default_cpu = 0;
-	const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
+	u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
 		NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
 		NIC_CFG_RSS_HASH_TYPE_IPV6 |
 		NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
@@ -2283,6 +2329,8 @@ static int enic_set_rss_nic_cfg(struct enic *enic)
 	const u8 rss_base_cpu = 0;
 	u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
 
+	if (vnic_dev_capable_udp_rss(enic->vdev))
+		rss_hash_type |= NIC_CFG_RSS_HASH_TYPE_UDP;
 	if (rss_enable) {
 		if (!enic_set_rsskey(enic)) {
 			if (enic_set_rsscpu(enic, rss_hash_bits)) {
@@ -2901,9 +2949,11 @@ static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		netdev->hw_features |= NETIF_F_RXCSUM;
 	if (ENIC_SETTING(enic, VXLAN)) {
 		u64 patch_level;
+		u64 a1 = 0;
 
 		netdev->hw_enc_features |= NETIF_F_RXCSUM		|
 					   NETIF_F_TSO			|
+					   NETIF_F_TSO6			|
 					   NETIF_F_TSO_ECN		|
 					   NETIF_F_GSO_UDP_TUNNEL	|
 					   NETIF_F_HW_CSUM		|
@@ -2922,9 +2972,10 @@ static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		 */
 		err = vnic_dev_get_supported_feature_ver(enic->vdev,
 							 VIC_FEATURE_VXLAN,
-							 &patch_level);
+							 &patch_level, &a1);
 		if (err)
 			patch_level = 0;
+		enic->vxlan.flags = (u8)a1;
 		/* mask bits that are supported by driver
 		 */
 		patch_level &= BIT_ULL(0) | BIT_ULL(2);

drivers/net/ethernet/cisco/enic/vnic_dev.c

@@ -1269,16 +1269,32 @@ int vnic_dev_overlay_offload_cfg(struct vnic_dev *vdev, u8 overlay,
 }
 
 int vnic_dev_get_supported_feature_ver(struct vnic_dev *vdev, u8 feature,
-				       u64 *supported_versions)
+				       u64 *supported_versions, u64 *a1)
 {
 	u64 a0 = feature;
 	int wait = 1000;
-	u64 a1 = 0;
 	int ret;
 
-	ret = vnic_dev_cmd(vdev, CMD_GET_SUPP_FEATURE_VER, &a0, &a1, wait);
+	ret = vnic_dev_cmd(vdev, CMD_GET_SUPP_FEATURE_VER, &a0, a1, wait);
 	if (!ret)
 		*supported_versions = a0;
 
 	return ret;
 }
+
+bool vnic_dev_capable_udp_rss(struct vnic_dev *vdev)
+{
+	u64 a0 = CMD_NIC_CFG, a1 = 0;
+	u64 rss_hash_type;
+	int wait = 1000;
+	int err;
+
+	err = vnic_dev_cmd(vdev, CMD_CAPABILITY, &a0, &a1, wait);
+	if (err || !a0)
+		return 0;
+
+	rss_hash_type = (a1 >> NIC_CFG_RSS_HASH_TYPE_SHIFT) &
+			NIC_CFG_RSS_HASH_TYPE_MASK_FIELD;
+
+	return (rss_hash_type & NIC_CFG_RSS_HASH_TYPE_UDP);
+}

drivers/net/ethernet/cisco/enic/vnic_dev.h

@@ -183,6 +183,7 @@ int vnic_dev_overlay_offload_ctrl(struct vnic_dev *vdev, u8 overlay, u8 config);
 int vnic_dev_overlay_offload_cfg(struct vnic_dev *vdev, u8 overlay,
 				 u16 vxlan_udp_port_number);
 int vnic_dev_get_supported_feature_ver(struct vnic_dev *vdev, u8 feature,
-				       u64 *supported_versions);
+				       u64 *supported_versions, u64 *a1);
+bool vnic_dev_capable_udp_rss(struct vnic_dev *vdev);
 
 #endif /* _VNIC_DEV_H_ */

drivers/net/ethernet/cisco/enic/vnic_devcmd.h

@@ -439,6 +439,7 @@ enum vnic_devcmd_cmd {
 
 /* flags for CMD_OPEN */
 #define CMD_OPENF_OPROM		0x1	/* open coming from option rom */
+#define CMD_OPENF_IG_DESCCACHE	0x2	/* Do not flush IG DESC cache */
 
 /* flags for CMD_INIT */
 #define CMD_INITF_DEFAULT_MAC	0x1	/* init with default mac addr */
@@ -697,6 +698,10 @@ enum overlay_ofld_cmd {
 
 #define OVERLAY_CFG_VXLAN_PORT_UPDATE	0
 
+#define ENIC_VXLAN_INNER_IPV6		BIT(0)
+#define ENIC_VXLAN_OUTER_IPV6		BIT(1)
+#define ENIC_VXLAN_MULTI_WQ		BIT(2)
+
 /* Use this enum to get the supported versions for each of these features
  * If you need to use the devcmd_get_supported_feature_version(), add
  * the new feature into this enum and install function handler in devcmd.c

drivers/net/ethernet/cisco/enic/vnic_nic.h

@@ -47,6 +47,7 @@
 #define NIC_CFG_RSS_HASH_TYPE_TCP_IPV6		(1 << 4)
 #define NIC_CFG_RSS_HASH_TYPE_IPV6_EX		(1 << 5)
 #define NIC_CFG_RSS_HASH_TYPE_TCP_IPV6_EX	(1 << 6)
+#define NIC_CFG_RSS_HASH_TYPE_UDP		(1 << 7)
 
 static inline void vnic_set_nic_cfg(u32 *nic_cfg,
 	u8 rss_default_cpu, u8 rss_hash_type,