Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 311 insertions, 0 deletions

diff --git a/kernel/include/rdma/ib_addr.h b/kernel/include/rdma/ib_addr.h
new file mode 100644
index 000000000..ac54c27a2
--- /dev/null
+++ b/kernel/include/rdma/ib_addr.h
@@ -0,0 +1,311 @@
+/*
+ * Copyright (c) 2005 Voltaire Inc.  All rights reserved.
+ * Copyright (c) 2005 Intel Corporation.  All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#if !defined(IB_ADDR_H)
+#define IB_ADDR_H
+
+#include <linux/in.h>
+#include <linux/in6.h>
+#include <linux/if_arp.h>
+#include <linux/netdevice.h>
+#include <linux/inetdevice.h>
+#include <linux/socket.h>
+#include <linux/if_vlan.h>
+#include <net/ipv6.h>
+#include <net/if_inet6.h>
+#include <net/ip.h>
+#include <rdma/ib_verbs.h>
+#include <rdma/ib_pack.h>
+#include <net/ipv6.h>
+
+struct rdma_addr_client {
+	atomic_t refcount;
+	struct completion comp;
+};
+
+/**
+ * rdma_addr_register_client - Register an address client.
+ */
+void rdma_addr_register_client(struct rdma_addr_client *client);
+
+/**
+ * rdma_addr_unregister_client - Deregister an address client.
+ * @client: Client object to deregister.
+ */
+void rdma_addr_unregister_client(struct rdma_addr_client *client);
+
+struct rdma_dev_addr {
+	unsigned char src_dev_addr[MAX_ADDR_LEN];
+	unsigned char dst_dev_addr[MAX_ADDR_LEN];
+	unsigned char broadcast[MAX_ADDR_LEN];
+	unsigned short dev_type;
+	int bound_dev_if;
+	enum rdma_transport_type transport;
+};
+
+/**
+ * rdma_translate_ip - Translate a local IP address to an RDMA hardware
+ *   address.
+ */
+int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr,
+		      u16 *vlan_id);
+
+/**
+ * rdma_resolve_ip - Resolve source and destination IP addresses to
+ *   RDMA hardware addresses.
+ * @client: Address client associated with request.
+ * @src_addr: An optional source address to use in the resolution.  If a
+ *   source address is not provided, a usable address will be returned via
+ *   the callback.
+ * @dst_addr: The destination address to resolve.
+ * @addr: A reference to a data location that will receive the resolved
+ *   addresses.  The data location must remain valid until the callback has
+ *   been invoked.
+ * @timeout_ms: Amount of time to wait for the address resolution to complete.
+ * @callback: Call invoked once address resolution has completed, timed out,
+ *   or been canceled.  A status of 0 indicates success.
+ * @context: User-specified context associated with the call.
+ */
+int rdma_resolve_ip(struct rdma_addr_client *client,
+		    struct sockaddr *src_addr, struct sockaddr *dst_addr,
+		    struct rdma_dev_addr *addr, int timeout_ms,
+		    void (*callback)(int status, struct sockaddr *src_addr,
+				     struct rdma_dev_addr *addr, void *context),
+		    void *context);
+
+void rdma_addr_cancel(struct rdma_dev_addr *addr);
+
+int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev,
+	      const unsigned char *dst_dev_addr);
+
+int rdma_addr_size(struct sockaddr *addr);
+
+int rdma_addr_find_smac_by_sgid(union ib_gid *sgid, u8 *smac, u16 *vlan_id);
+int rdma_addr_find_dmac_by_grh(union ib_gid *sgid, union ib_gid *dgid, u8 *smac,
+			       u16 *vlan_id);
+
+static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr)
+{
+	return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9];
+}
+
+static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey)
+{
+	dev_addr->broadcast[8] = pkey >> 8;
+	dev_addr->broadcast[9] = (unsigned char) pkey;
+}
+
+static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr,
+				    union ib_gid *gid)
+{
+	memcpy(gid, dev_addr->broadcast + 4, sizeof *gid);
+}
+
+static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr)
+{
+	return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0;
+}
+
+static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev)
+{
+	return dev->priv_flags & IFF_802_1Q_VLAN ?
+		vlan_dev_vlan_id(dev) : 0xffff;
+}
+
+static inline int rdma_ip2gid(struct sockaddr *addr, union ib_gid *gid)
+{
+	switch (addr->sa_family) {
+	case AF_INET:
+		ipv6_addr_set_v4mapped(((struct sockaddr_in *)
+					addr)->sin_addr.s_addr,
+				       (struct in6_addr *)gid);
+		break;
+	case AF_INET6:
+		memcpy(gid->raw, &((struct sockaddr_in6 *)addr)->sin6_addr, 16);
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+/* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */
+static inline void rdma_gid2ip(struct sockaddr *out, union ib_gid *gid)
+{
+	if (ipv6_addr_v4mapped((struct in6_addr *)gid)) {
+		struct sockaddr_in *out_in = (struct sockaddr_in *)out;
+		memset(out_in, 0, sizeof(*out_in));
+		out_in->sin_family = AF_INET;
+		memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4);
+	} else {
+		struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out;
+		memset(out_in, 0, sizeof(*out_in));
+		out_in->sin6_family = AF_INET6;
+		memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16);
+	}
+}
+
+static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr,
+				      union ib_gid *gid)
+{
+	struct net_device *dev;
+	struct in_device *ip4;
+
+	dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
+	if (dev) {
+		ip4 = (struct in_device *)dev->ip_ptr;
+		if (ip4 && ip4->ifa_list && ip4->ifa_list->ifa_address)
+			ipv6_addr_set_v4mapped(ip4->ifa_list->ifa_address,
+					       (struct in6_addr *)gid);
+		dev_put(dev);
+	}
+}
+
+static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
+{
+	if (dev_addr->transport == RDMA_TRANSPORT_IB &&
+	    dev_addr->dev_type != ARPHRD_INFINIBAND)
+		iboe_addr_get_sgid(dev_addr, gid);
+	else
+		memcpy(gid, dev_addr->src_dev_addr +
+		       rdma_addr_gid_offset(dev_addr), sizeof *gid);
+}
+
+static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
+{
+	memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
+}
+
+static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
+{
+	memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid);
+}
+
+static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
+{
+	memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
+}
+
+static inline enum ib_mtu iboe_get_mtu(int mtu)
+{
+	/*
+	 * reduce IB headers from effective IBoE MTU. 28 stands for
+	 * atomic header which is the biggest possible header after BTH
+	 */
+	mtu = mtu - IB_GRH_BYTES - IB_BTH_BYTES - 28;
+
+	if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096))
+		return IB_MTU_4096;
+	else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048))
+		return IB_MTU_2048;
+	else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024))
+		return IB_MTU_1024;
+	else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512))
+		return IB_MTU_512;
+	else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256))
+		return IB_MTU_256;
+	else
+		return 0;
+}
+
+static inline int iboe_get_rate(struct net_device *dev)
+{
+	struct ethtool_cmd cmd;
+	u32 speed;
+	int err;
+
+	rtnl_lock();
+	err = __ethtool_get_settings(dev, &cmd);
+	rtnl_unlock();
+	if (err)
+		return IB_RATE_PORT_CURRENT;
+
+	speed = ethtool_cmd_speed(&cmd);
+	if (speed >= 40000)
+		return IB_RATE_40_GBPS;
+	else if (speed >= 30000)
+		return IB_RATE_30_GBPS;
+	else if (speed >= 20000)
+		return IB_RATE_20_GBPS;
+	else if (speed >= 10000)
+		return IB_RATE_10_GBPS;
+	else
+		return IB_RATE_PORT_CURRENT;
+}
+
+static inline int rdma_link_local_addr(struct in6_addr *addr)
+{
+	if (addr->s6_addr32[0] == htonl(0xfe800000) &&
+	    addr->s6_addr32[1] == 0)
+		return 1;
+
+	return 0;
+}
+
+static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac)
+{
+	memcpy(mac, &addr->s6_addr[8], 3);
+	memcpy(mac + 3, &addr->s6_addr[13], 3);
+	mac[0] ^= 2;
+}
+
+static inline int rdma_is_multicast_addr(struct in6_addr *addr)
+{
+	return addr->s6_addr[0] == 0xff;
+}
+
+static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac)
+{
+	int i;
+
+	mac[0] = 0x33;
+	mac[1] = 0x33;
+	for (i = 2; i < 6; ++i)
+		mac[i] = addr->s6_addr[i + 10];
+}
+
+static inline u16 rdma_get_vlan_id(union ib_gid *dgid)
+{
+	u16 vid;
+
+	vid = dgid->raw[11] << 8 | dgid->raw[12];
+	return vid < 0x1000 ? vid : 0xffff;
+}
+
+static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev)
+{
+	return dev->priv_flags & IFF_802_1Q_VLAN ?
+		vlan_dev_real_dev(dev) : NULL;
+}
+
+#endif /* IB_ADDR_H */