text: /*
   * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
   * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
   * Copyright (c) 2004 Voltaire, Inc. 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.
   */
  
  #ifndef _IPOIB_H
  #define _IPOIB_H
  
  #include <linux/list.h>
  #include <linux/skbuff.h>
  #include <linux/netdevice.h>
  #include <linux/workqueue.h>
  #include <linux/kref.h>
  #include <linux/if_infiniband.h>
  #include <linux/mutex.h>
  
  #include <net/neighbour.h>
  #include <net/sch_generic.h>
  
  #include <linux/atomic.h>
  
  #include <rdma/ib_verbs.h>
  #include <rdma/ib_pack.h>
  #include <rdma/ib_sa.h>
  #include <linux/sched.h>
  /* constants */
  
  enum ipoib_flush_level {
  	IPOIB_FLUSH_LIGHT,
  	IPOIB_FLUSH_NORMAL,
  	IPOIB_FLUSH_HEAVY
  };
  
  enum {
  	IPOIB_ENCAP_LEN		  = 4,
  	IPOIB_PSEUDO_LEN	  = 20,
  	IPOIB_HARD_LEN		  = IPOIB_ENCAP_LEN + IPOIB_PSEUDO_LEN,
  
  	IPOIB_UD_HEAD_SIZE	  = IB_GRH_BYTES + IPOIB_ENCAP_LEN,
  	IPOIB_UD_RX_SG		  = 2, /* max buffer needed for 4K mtu */
  
  	IPOIB_CM_MTU		  = 0x10000 - 0x10, /* padding to align header to 16 */
  	IPOIB_CM_BUF_SIZE	  = IPOIB_CM_MTU  + IPOIB_ENCAP_LEN,
  	IPOIB_CM_HEAD_SIZE	  = IPOIB_CM_BUF_SIZE % PAGE_SIZE,
  	IPOIB_CM_RX_SG		  = ALIGN(IPOIB_CM_BUF_SIZE, PAGE_SIZE) / PAGE_SIZE,
  	IPOIB_RX_RING_SIZE	  = 256,
  	IPOIB_TX_RING_SIZE	  = 128,
  	IPOIB_MAX_QUEUE_SIZE	  = 8192,
  	IPOIB_MIN_QUEUE_SIZE	  = 2,
  	IPOIB_CM_MAX_CONN_QP	  = 4096,
  
  	IPOIB_NUM_WC		  = 4,
  
  	IPOIB_MAX_PATH_REC_QUEUE  = 3,
  	IPOIB_MAX_MCAST_QUEUE	  = 64,
  
  	IPOIB_FLAG_OPER_UP	  = 0,
  	IPOIB_FLAG_INITIALIZED	  = 1,
  	IPOIB_FLAG_ADMIN_UP	  = 2,
  	IPOIB_PKEY_ASSIGNED	  = 3,
  	IPOIB_FLAG_SUBINTERFACE	  = 5,
  	IPOIB_STOP_REAPER	  = 7,
  	IPOIB_FLAG_ADMIN_CM	  = 9,
  	IPOIB_FLAG_UMCAST	  = 10,
  	IPOIB_NEIGH_TBL_FLUSH	  = 12,
  	IPOIB_FLAG_DEV_ADDR_SET	  = 13,
  	IPOIB_FLAG_DEV_ADDR_CTRL  = 14,
  
  	IPOIB_MAX_BACKOFF_SECONDS = 16,
  
  	IPOIB_MCAST_FLAG_FOUND	  = 0,	/* used in set_multicast_list */
  	IPOIB_MCAST_FLAG_SENDONLY = 1,
  	/*
  	 * For IPOIB_MCAST_FLAG_BUSY
  	 * When set, in flight join and mcast->mc is unreliable
  	 * When clear and mcast->mc IS_ERR_OR_NULL, need to restart or
  	 *   haven't started yet
  	 * When clear and mcast->mc is valid pointer, join was successful
  	 */
  	IPOIB_MCAST_FLAG_BUSY	  = 2,
  	IPOIB_MCAST_FLAG_ATTACHED = 3,
  
  	MAX_SEND_CQE		  = 64,
  	IPOIB_CM_COPYBREAK	  = 256,
  
  	IPOIB_NON_CHILD		  = 0,
  	IPOIB_LEGACY_CHILD	  = 1,
  	IPOIB_RTNL_CHILD	  = 2,
  };
  
  #define	IPOIB_OP_RECV   (1ul << 31)
  #ifdef CONFIG_INFINIBAND_IPOIB_CM
  #define	IPOIB_OP_CM     (1ul << 30)
  #else
  #define	IPOIB_OP_CM     (0)
  #endif
  
  #define IPOIB_QPN_MASK ((__force u32) cpu_to_be32(0xFFFFFF))
  
  /* structs */
  
  struct ipoib_header {
  	__be16	proto;
  	u16	reserved;
  };
  
  struct ipoib_pseudo_header {
  	u8	hwaddr[INFINIBAND_ALEN];
  };
  
  static inline void skb_add_pseudo_hdr(struct sk_buff *skb)
  {
  	char *data = skb_push(skb, IPOIB_PSEUDO_LEN);
  
  	/*
  	 * only the ipoib header is present now, make room for a dummy
  	 * pseudo header and set skb field accordingly
  	 */
  	memset(data, 0, IPOIB_PSEUDO_LEN);
  	skb_reset_mac_header(skb);
  	skb_pull(skb, IPOIB_HARD_LEN);
  }
  
  static inline struct ipoib_dev_priv *ipoib_priv(const struct net_device *dev)
  {
  	struct rdma_netdev *rn = netdev_priv(dev);
  
  	return rn->clnt_priv;
  }
  
  /* Used for all multicast joins (broadcast, IPv4 mcast and IPv6 mcast) */
  struct ipoib_mcast {
  	struct ib_sa_mcmember_rec mcmember;
  	struct ib_sa_multicast	 *mc;
  	struct ipoib_ah		 *ah;
  
  	struct rb_node    rb_node;
  	struct list_head  list;
  
  	unsigned long created;
  	unsigned long backoff;
  	unsigned long delay_until;
  
  	unsigned long flags;
  	unsigned char logcount;
  
  	struct list_head  neigh_list;
  
  	struct sk_buff_head pkt_queue;
  
  	struct net_device *dev;
  	struct completion done;
  };
  
  struct ipoib_rx_buf {
  	struct sk_buff *skb;
  	u64		mapping[IPOIB_UD_RX_SG];
  };
  
  struct ipoib_tx_buf {
  	struct sk_buff *skb;
  	u64		mapping[MAX_SKB_FRAGS + 1];
  };
  
  struct ib_cm_id;
  
  struct ipoib_cm_data {
  	__be32 qpn; /* High byte MUST be ignored on receive */
  	__be32 mtu;
  };
  
  /*
   * Quoting 10.3.1 Queue Pair and EE Context States:
   *
   * Note, for QPs that are associated with an SRQ, the Consumer should take the
   * QP through the Error State before invoking a Destroy QP or a Modify QP to the
   * Reset State.  The Consumer may invoke the Destroy QP without first performing
   * a Modify QP to the Error State and waiting for the Affiliated Asynchronous
   * Last WQE Reached Event. However, if the Consumer does not wait for the
   * Affiliated Asynchronous Last WQE Reached Event, then WQE and Data Segment
   * leakage may occur. Therefore, it is good programming practice to tear down a
   * QP that is associated with an SRQ by using the following process:
   *
   * - Put the QP in the Error State
   * - Wait for the Affiliated Asynchronous Last WQE Reached Event;
   * - either:
   *       drain the CQ by invoking the Poll CQ verb and either wait for CQ
   *       to be empty or the number of Poll CQ operations has exceeded
   *       CQ capacity size;
   * - or
   *       post another WR that completes on the same CQ and wait for this
   *       WR to return as a WC;
   * - and then invoke a Destroy QP or Reset QP.
   *
   * We use the second option and wait for a completion on the
   * same CQ before destroying QPs attached to our SRQ.
   */
  
  enum ipoib_cm_state {
  	IPOIB_CM_RX_LIVE,
  	IPOIB_CM_RX_ERROR, /* Ignored by stale task */
  	IPOIB_CM_RX_FLUSH  /* Last WQE Reached event observed */
  };
  
  struct ipoib_cm_rx {
  	struct ib_cm_id	       *id;
  	struct ib_qp	       *qp;
  	struct ipoib_cm_rx_buf *rx_ring;
  	struct list_head	list;
  	struct net_device      *dev;
  	unsigned long		jiffies;
  	enum ipoib_cm_state	state;
  	int			recv_count;
  };
  
  struct ipoib_cm_tx {
  	struct ib_cm_id	    *id;
  	struct ib_qp	    *qp;
  	struct list_head     list;
  	struct net_device   *dev;
  	struct ipoib_neigh  *neigh;
  	struct ipoib_tx_buf *tx_ring;
  	unsigned int	     tx_head;
  	unsigned int	     tx_tail;
  	unsigned long	     flags;
  	u32		     mtu;
  	unsigned int         max_send_sge;
  };
  
  struct ipoib_cm_rx_buf {
  	struct sk_buff *skb;
  	u64 mapping[IPOIB_CM_RX_SG];
  };
  
  struct ipoib_cm_dev_priv {
  	struct ib_srq	       *srq;
  	struct ipoib_cm_rx_buf *srq_ring;
  	struct ib_cm_id	       *id;
  	struct list_head	passive_ids;   /* state: LIVE */
  	struct list_head	rx_error_list; /* state: ERROR */
  	struct list_head	rx_flush_list; /* state: FLUSH, drain not started */
  	struct list_head	rx_drain_list; /* state: FLUSH, drain started */
  	struct list_head	rx_reap_list;  /* state: FLUSH, drain done */
  	struct work_struct      start_task;
  	struct work_struct      reap_task;
  	struct work_struct      skb_task;
  	struct work_struct      rx_reap_task;
  	struct delayed_work     stale_task;
  	struct sk_buff_head     skb_queue;
  	struct list_head	start_list;
  	struct list_head	reap_list;
  	struct ib_wc		ibwc[IPOIB_NUM_WC];
  	struct ib_sge		rx_sge[IPOIB_CM_RX_SG];
  	struct ib_recv_wr       rx_wr;
  	int			nonsrq_conn_qp;
  	int			max_cm_mtu;
  	int			num_frags;
  };
  
  struct ipoib_ethtool_st {
  	u16     coalesce_usecs;
  	u16     max_coalesced_frames;
  };
  
  struct ipoib_neigh_table;
  
  struct ipoib_neigh_hash {
  	struct ipoib_neigh_table       *ntbl;
  	struct ipoib_neigh __rcu      **buckets;
  	struct rcu_head			rcu;
  	u32				mask;
  	u32				size;
  };
  
  struct ipoib_neigh_table {
  	struct ipoib_neigh_hash __rcu  *htbl;
  	atomic_t			entries;
  	struct completion		flushed;
  	struct completion		deleted;
  };
  
  struct ipoib_qp_state_validate {
  	struct work_struct work;
  	struct ipoib_dev_priv   *priv;
  };
  
  /*
   * Device private locking: network stack tx_lock protects members used
   * in TX fast path, lock protects everything else.  lock nests inside
   * of tx_lock (ie tx_lock must be acquired first if needed).
   */
  struct ipoib_dev_priv {
  	spinlock_t lock;
  
  	struct net_device *dev;
  	void (*next_priv_destructor)(struct net_device *dev);
  
  	struct napi_struct send_napi;
  	struct napi_struct recv_napi;
  
  	unsigned long flags;
  
  	/*
  	 * This protects access to the child_intfs list.
  	 * To READ from child_intfs the RTNL or vlan_rwsem read side must be
  	 * held.  To WRITE RTNL and the vlan_rwsem write side must be held (in
  	 * that order) This lock exists because we have a few contexts where
  	 * we need the child_intfs, but do not want to grab the RTNL.
  	 */
  	struct rw_semaphore vlan_rwsem;
  	struct mutex mcast_mutex;
  
  	struct rb_root  path_tree;
  	struct list_head path_list;
  
  	struct ipoib_neigh_table ntbl;
  
  	struct ipoib_mcast *broadcast;
  	struct list_head multicast_list;
  	struct rb_root multicast_tree;
  
  	struct workqueue_struct *wq;
  	struct delayed_work mcast_task;
  	struct work_struct carrier_on_task;
  	struct work_struct flush_light;
  	struct work_struct flush_normal;
  	struct work_struct flush_heavy;
  	struct work_struct restart_task;
  	struct delayed_work ah_reap_task;
  	struct delayed_work neigh_reap_task;
  	struct ib_device *ca;
  	u8		  port;
  	u16		  pkey;
  	u16		  pkey_index;
  	struct ib_pd	 *pd;
  	struct ib_cq	 *recv_cq;
  	struct ib_cq	 *send_cq;
  	struct ib_qp	 *qp;
  	u32		  qkey;
  
  	union ib_gid local_gid;
  	u32	     local_lid;
  
  	unsigned int admin_mtu;
  	unsigned int mcast_mtu;
  	unsigned int max_ib_mtu;
  
  	struct ipoib_rx_buf *rx_ring;
  
  	struct ipoib_tx_buf *tx_ring;
  	/* cyclic ring variables for managing tx_ring, for UD only */
  	unsigned int	     tx_head;
  	unsigned int	     tx_tail;
  	/* cyclic ring variables for counting overall outstanding send WRs */
  	unsigned int	     global_tx_head;
  	unsigned int	     global_tx_tail;
  	struct ib_sge	     tx_sge[MAX_SKB_FRAGS + 1];
  	struct ib_ud_wr      tx_wr;
  	struct ib_wc	     send_wc[MAX_SEND_CQE];
  
  	struct ib_recv_wr    rx_wr;
  	struct ib_sge	     rx_sge[IPOIB_UD_RX_SG];
  
  	struct ib_wc ibwc[IPOIB_NUM_WC];
  
  	struct list_head dead_ahs;
  
  	struct ib_event_handler event_handler;
  
  	struct net_device *parent;
  	struct list_head child_intfs;
  	struct list_head list;
  	int    child_type;
  
  #ifdef CONFIG_INFINIBAND_IPOIB_CM
  	struct ipoib_cm_dev_priv cm;
  #endif
  
  #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
  	struct list_head fs_list;
  	struct dentry *mcg_dentry;
  	struct dentry *path_dentry;
  #endif
  	u64	hca_caps;
  	struct ipoib_ethtool_st ethtool;
  	unsigned int max_send_sge;
  	const struct net_device_ops	*rn_ops;
  };
  
  struct ipoib_ah {
  	struct net_device *dev;
  	struct ib_ah	  *ah;
  	struct list_head   list;
  	struct kref	   ref;
  	unsigned int	   last_send;
  	int  		   valid;
  };
  
  struct ipoib_path {
  	struct net_device    *dev;
  	struct sa_path_rec pathrec;
  	struct ipoib_ah      *ah;
  	struct sk_buff_head   queue;
  
  	struct list_head      neigh_list;
  
  	int		      query_id;
  	struct ib_sa_query   *query;
  	struct completion     done;
  
  	struct rb_node	      rb_node;
  	struct list_head      list;
  };
  
  struct ipoib_neigh {
  	struct ipoib_ah    *ah;
  #ifdef CONFIG_INFINIBAND_IPOIB_CM
  	struct ipoib_cm_tx *cm;
  #endif
  	u8     daddr[INFINIBAND_ALEN];
  	struct sk_buff_head queue;
  
  	struct net_device *dev;
  
  	struct list_head    list;
  	struct ipoib_neigh __rcu *hnext;
  	struct rcu_head     rcu;
  	refcount_t	    refcnt;
  	unsigned long       alive;
  };
  
  #define IPOIB_UD_MTU(ib_mtu)		(ib_mtu - IPOIB_ENCAP_LEN)
  #define IPOIB_UD_BUF_SIZE(ib_mtu)	(ib_mtu + IB_GRH_BYTES)
  
  void ipoib_neigh_dtor(struct ipoib_neigh *neigh);
  static inline void ipoib_neigh_put(struct ipoib_neigh *neigh)
  {
  	if (refcount_dec_and_test(&neigh->refcnt))
  		ipoib_neigh_dtor(neigh);
  }
  struct ipoib_neigh *ipoib_neigh_get(struct net_device *dev, u8 *daddr);
  struct ipoib_neigh *ipoib_neigh_alloc(u8 *daddr,
  				      struct net_device *dev);
  void ipoib_neigh_free(struct ipoib_neigh *neigh);
  void ipoib_del_neighs_by_gid(struct net_device *dev, u8 *gid);
  
  extern struct workqueue_struct *ipoib_workqueue;
  
  /* functions */
  
  int ipoib_rx_poll(struct napi_struct *napi, int budget);
  int ipoib_tx_poll(struct napi_struct *napi, int budget);
  void ipoib_ib_rx_completion(struct ib_cq *cq, void *ctx_ptr);
  void ipoib_ib_tx_completion(struct ib_cq *cq, void *ctx_ptr);
  
  struct ipoib_ah *ipoib_create_ah(struct net_device *dev,
  				 struct ib_pd *pd, struct rdma_ah_attr *attr);
  void ipoib_free_ah(struct kref *kref);
  static inline void ipoib_put_ah(struct ipoib_ah *ah)
  {
  	kref_put(&ah->ref, ipoib_free_ah);
  }
  int ipoib_open(struct net_device *dev);
  void ipoib_intf_free(struct net_device *dev);
  int ipoib_add_pkey_attr(struct net_device *dev);
  int ipoib_add_umcast_attr(struct net_device *dev);
  
  int ipoib_send(struct net_device *dev, struct sk_buff *skb,
  	       struct ib_ah *address, u32 dqpn);
  void ipoib_reap_ah(struct work_struct *work);
  
  struct ipoib_path *__path_find(struct net_device *dev, void *gid);
  void ipoib_mark_paths_invalid(struct net_device *dev);
  void ipoib_flush_paths(struct net_device *dev);
  struct net_device *ipoib_intf_alloc(struct ib_device *hca, u32 port,
  				    const char *format);
  int ipoib_intf_init(struct ib_device *hca, u32 port, const char *format,
  		    struct net_device *dev);
  void ipoib_ib_tx_timer_func(struct timer_list *t);
  void ipoib_ib_dev_flush_light(struct work_struct *work);
  void ipoib_ib_dev_flush_normal(struct work_struct *work);
  void ipoib_ib_dev_flush_heavy(struct work_struct *work);
  void ipoib_pkey_event(struct work_struct *work);
  void ipoib_ib_dev_cleanup(struct net_device *dev);
  
  int ipoib_ib_dev_open_default(struct net_device *dev);
  int ipoib_ib_dev_open(struct net_device *dev);
  void ipoib_ib_dev_stop(struct net_device *dev);
  void ipoib_ib_dev_up(struct net_device *dev);
  void ipoib_ib_dev_down(struct net_device *dev);
  int ipoib_ib_dev_stop_default(struct net_device *dev);
  void ipoib_pkey_dev_check_presence(struct net_device *dev);
  
  void ipoib_mcast_join_task(struct work_struct *work);
  void ipoib_mcast_carrier_on_task(struct work_struct *work);
  void ipoib_mcast_send(struct net_device *dev, u8 *daddr, struct sk_buff *skb);
  
  void ipoib_mcast_restart_task(struct work_struct *work);
  void ipoib_mcast_start_thread(struct net_device *dev);
  void ipoib_mcast_stop_thread(struct net_device *dev);
  
  void ipoib_mcast_dev_down(struct net_device *dev);
  void ipoib_mcast_dev_flush(struct net_device *dev);
  
  int ipoib_dma_map_tx(struct ib_device *ca, struct ipoib_tx_buf *tx_req);
  void ipoib_dma_unmap_tx(struct ipoib_dev_priv *priv,
  			struct ipoib_tx_buf *tx_req);
  
  struct rtnl_link_ops *ipoib_get_link_ops(void);
  
  static inline void ipoib_build_sge(struct ipoib_dev_priv *priv,
  				   struct ipoib_tx_buf *tx_req)
  {
  	int i, off;
  	struct sk_buff *skb = tx_req->skb;
  	skb_frag_t *frags = skb_shinfo(skb)->frags;
  	int nr_frags = skb_shinfo(skb)->nr_frags;
  	u64 *mapping = tx_req->mapping;
  
  	if (skb_headlen(skb)) {
  		priv->tx_sge[0].addr         = mapping[0];
  		priv->tx_sge[0].length       = skb_headlen(skb);
  		off = 1;
  	} else
  		off = 0;
  
  	for (i = 0; i < nr_frags; ++i) {
  		priv->tx_sge[i + off].addr = mapping[i + off];
  		priv->tx_sge[i + off].length = skb_frag_size(&frags[i]);
  	}
  	priv->tx_wr.wr.num_sge	     = nr_frags + off;
  }
  
  #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
  struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev);
  int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter);
  void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter,
  				  union ib_gid *gid,
  				  unsigned long *created,
  				  unsigned int *queuelen,
  				  unsigned int *complete,
  				  unsigned int *send_only);
  
  struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev);
  int ipoib_path_iter_next(struct ipoib_path_iter *iter);
  void ipoib_path_iter_read(struct ipoib_path_iter *iter,
  			  struct ipoib_path *path);
  #endif
  
  int ipoib_mcast_attach(struct net_device *dev, struct ib_device *hca,
  		       union ib_gid *mgid, u16 mlid, int set_qkey, u32 qkey);
  int ipoib_mcast_detach(struct net_device *dev, struct ib_device *hca,
  		       union ib_gid *mgid, u16 mlid);
  void ipoib_mcast_remove_list(struct list_head *remove_list);
  void ipoib_check_and_add_mcast_sendonly(struct ipoib_dev_priv *priv, u8 *mgid,
  				struct list_head *remove_list);
  
  int ipoib_init_qp(struct net_device *dev);
  int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca);
  void ipoib_transport_dev_cleanup(struct net_device *dev);
  
  void ipoib_event(struct ib_event_handler *handler,
  		 struct ib_event *record);
  
  int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey);
  int ipoib_vlan_delete(struct net_device *pdev, unsigned short pkey);
  
  int __ipoib_vlan_add(struct ipoib_dev_priv *ppriv, struct ipoib_dev_priv *priv,
  		     u16 pkey, int child_type);
  
  int  __init ipoib_netlink_init(void);
  void __exit ipoib_netlink_fini(void);
  
  void ipoib_set_umcast(struct net_device *ndev, int umcast_val);
  int  ipoib_set_mode(struct net_device *dev, const char *buf);
  
  void ipoib_setup_common(struct net_device *dev);
  
  void ipoib_pkey_open(struct ipoib_dev_priv *priv);
  void ipoib_drain_cq(struct net_device *dev);
  
  void ipoib_set_ethtool_ops(struct net_device *dev);
  
  #define IPOIB_FLAGS_RC		0x80
  #define IPOIB_FLAGS_UC		0x40
  
  /* We don't support UC connections at the moment */
  #define IPOIB_CM_SUPPORTED(ha)   (ha[0] & (IPOIB_FLAGS_RC))
  
  #ifdef CONFIG_INFINIBAND_IPOIB_CM
  
  extern int ipoib_max_conn_qp;
  
  static inline int ipoib_cm_admin_enabled(struct net_device *dev)
  {
  	struct ipoib_dev_priv *priv = ipoib_priv(dev);
  	return IPOIB_CM_SUPPORTED(dev->dev_addr) &&
  		test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
  }
  
  static inline int ipoib_cm_enabled(struct net_device *dev, u8 *hwaddr)
  {
  	struct ipoib_dev_priv *priv = ipoib_priv(dev);
  	return IPOIB_CM_SUPPORTED(hwaddr) &&
  		test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
  }
  
  static inline int ipoib_cm_up(struct ipoib_neigh *neigh)
  
  {
  	return test_bit(IPOIB_FLAG_OPER_UP, &neigh->cm->flags);
  }
  
  static inline struct ipoib_cm_tx *ipoib_cm_get(struct ipoib_neigh *neigh)
  {
  	return neigh->cm;
  }
  
  static inline void ipoib_cm_set(struct ipoib_neigh *neigh, struct ipoib_cm_tx *tx)
  {
  	neigh->cm = tx;
  }
  
  static inline int ipoib_cm_has_srq(struct net_device *dev)
  {
  	struct ipoib_dev_priv *priv = ipoib_priv(dev);
  	return !!priv->cm.srq;
  }
  
  static inline unsigned int ipoib_cm_max_mtu(struct net_device *dev)
  {
  	struct ipoib_dev_priv *priv = ipoib_priv(dev);
  	return priv->cm.max_cm_mtu;
  }
  
  void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_tx *tx);
  int ipoib_cm_dev_open(struct net_device *dev);
  void ipoib_cm_dev_stop(struct net_device *dev);
  int ipoib_cm_dev_init(struct net_device *dev);
  int ipoib_cm_add_mode_attr(struct net_device *dev);
  void ipoib_cm_dev_cleanup(struct net_device *dev);
  struct ipoib_cm_tx *ipoib_cm_create_tx(struct net_device *dev, struct ipoib_path *path,
  				    struct ipoib_neigh *neigh);
  void ipoib_cm_destroy_tx(struct ipoib_cm_tx *tx);
  void ipoib_cm_skb_too_long(struct net_device *dev, struct sk_buff *skb,
  			   unsigned int mtu);
  void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc);
  void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc);
  #else
  
  #define ipoib_max_conn_qp 0
  
  static inline int ipoib_cm_admin_enabled(struct net_device *dev)
  {
  	return 0;
  }
  static inline int ipoib_cm_enabled(struct net_device *dev, u8 *hwaddr)
  
  {
  	return 0;
  }
  
  static inline int ipoib_cm_up(struct ipoib_neigh *neigh)
  
  {
  	return 0;
  }
  
  static inline struct ipoib_cm_tx *ipoib_cm_get(struct ipoib_neigh *neigh)
  {
  	return NULL;
  }
  
  static inline void ipoib_cm_set(struct ipoib_neigh *neigh, struct ipoib_cm_tx *tx)
  {
  }
  
  static inline int ipoib_cm_has_srq(struct net_device *dev)
  {
  	return 0;
  }
  
  static inline unsigned int ipoib_cm_max_mtu(struct net_device *dev)
  {
  	return 0;
  }
  
  static inline
  void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_tx *tx)
  {
  	return;
  }
  
  static inline
  int ipoib_cm_dev_open(struct net_device *dev)
  {
  	return 0;
  }
  
  static inline
  void ipoib_cm_dev_stop(struct net_device *dev)
  {
  	return;
  }
  
  static inline
  int ipoib_cm_dev_init(struct net_device *dev)
  {
  	return -EOPNOTSUPP;
  }
  
  static inline
  void ipoib_cm_dev_cleanup(struct net_device *dev)
  {
  	return;
  }
  
  static inline
  struct ipoib_cm_tx *ipoib_cm_create_tx(struct net_device *dev, struct ipoib_path *path,
  				    struct ipoib_neigh *neigh)
  {
  	return NULL;
  }
  
  static inline
  void ipoib_cm_destroy_tx(struct ipoib_cm_tx *tx)
  {
  	return;
  }
  
  static inline
  int ipoib_cm_add_mode_attr(struct net_device *dev)
  {
  	return 0;
  }
  
  static inline void ipoib_cm_skb_too_long(struct net_device *dev, struct sk_buff *skb,
  					 unsigned int mtu)
  {
  	dev_kfree_skb_any(skb);
  }
  
  static inline void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc)
  {
  }
  
  static inline void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
  {
  }
  #endif
  
  #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
  void ipoib_create_debug_files(struct net_device *dev);
  void ipoib_delete_debug_files(struct net_device *dev);
  void ipoib_register_debugfs(void);
  void ipoib_unregister_debugfs(void);
  #else
  static inline void ipoib_create_debug_files(struct net_device *dev) { }
  static inline void ipoib_delete_debug_files(struct net_device *dev) { }
  static inline void ipoib_register_debugfs(void) { }
  static inline void ipoib_unregister_debugfs(void) { }
  #endif
  
  #define ipoib_printk(level, priv, format, arg...)	\
  	printk(level "%s: " format, ((struct ipoib_dev_priv *) priv)->dev->name , ## arg)
  #define ipoib_warn(priv, format, arg...)		\
  do {							\
  	static DEFINE_RATELIMIT_STATE(_rs,		\
  		10 * HZ /*10 seconds */,		\
  		100);		\
  	if (__ratelimit(&_rs))				\
  		ipoib_printk(KERN_WARNING, priv, format , ## arg);\
  } while (0)
  
  extern int ipoib_sendq_size;
  extern int ipoib_recvq_size;
  
  extern struct ib_sa_client ipoib_sa_client;
  
  #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
  extern int ipoib_debug_level;
  
  #define ipoib_dbg(priv, format, arg...)			\
  	do {						\
  		if (ipoib_debug_level > 0)			\
  			ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
  	} while (0)
  #define ipoib_dbg_mcast(priv, format, arg...)		\
  	do {						\
  		if (mcast_debug_level > 0)		\
  			ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
  	} while (0)
  #else /* CONFIG_INFINIBAND_IPOIB_DEBUG */
  #define ipoib_dbg(priv, format, arg...)			\
  	do { (void) (priv); } while (0)
  #define ipoib_dbg_mcast(priv, format, arg...)		\
  	do { (void) (priv); } while (0)
  #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
  
  #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA
  #define ipoib_dbg_data(priv, format, arg...)		\
  	do {						\
  		if (data_debug_level > 0)		\
  			ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
  	} while (0)
  #else /* CONFIG_INFINIBAND_IPOIB_DEBUG_DATA */
  #define ipoib_dbg_data(priv, format, arg...)		\
  	do { (void) (priv); } while (0)
  #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG_DATA */
  
  #define IPOIB_QPN(ha) (be32_to_cpup((__be32 *) ha) & 0xffffff)
  
  #endif /* _IPOIB_H */
  