FreeBSD/Linux Kernel Cross Reference
sys/ofed/drivers/infiniband/ulp/ipoib/ipoib.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
      *
      * 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.
     *
     * $FreeBSD$
     */
    
    #ifndef _IPOIB_H
    #define _IPOIB_H
    
    #define LINUXKPI_PARAM_PREFIX ipoib_
    
    #include "opt_inet.h"
    #include "opt_inet6.h"
    #include "opt_ofed.h"
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/lock.h>
    #include <sys/malloc.h>
    #include <sys/mbuf.h>
    #include <sys/random.h>
    #include <sys/rwlock.h>
    #include <sys/socket.h>
    #include <sys/sockio.h>
    #include <sys/sysctl.h>
    
    #include <net/if.h>
    #include <net/if_var.h>
    #include <net/if_arp.h>
    #include <net/netisr.h>
    #include <net/route.h>
    #include <net/if_llc.h>
    #include <net/if_dl.h>
    #include <net/if_types.h>
    #include <net/bpf.h>
    #include <net/if_llatbl.h>
    #include <net/vnet.h>
    
    #if defined(INET) || defined(INET6)
    #include <netinet/in.h>
    #include <netinet/in_var.h>
    #include <netinet/if_ether.h>
    #include <netinet/ip_var.h>
    #endif
    #ifdef INET6
    #include <netinet6/nd6.h>
    #endif
    
    #include <security/mac/mac_framework.h>
    
    #include <linux/list.h>
    
    #include <linux/workqueue.h>
    #include <linux/kref.h>
    #include <linux/mutex.h>
    #include <linux/rbtree.h>
    
    #include <asm/atomic.h>
    
    #include <rdma/ib_verbs.h>
    #include <rdma/ib_pack.h>
    #include <rdma/ib_sa.h>
    
    /* constants */
    
    #define INFINIBAND_ALEN         20      /* Octets in IPoIB HW addr */
   
   #ifdef IPOIB_CM
   #define CONFIG_INFINIBAND_IPOIB_CM
   #endif
   
   #ifdef IPOIB_DEBUG
   #define CONFIG_INFINIBAND_IPOIB_DEBUG
   #define CONFIG_INFINIBAND_IPOIB_DEBUG_DATA
   #endif
   
   enum ipoib_flush_level {
           IPOIB_FLUSH_LIGHT,
           IPOIB_FLUSH_NORMAL,
           IPOIB_FLUSH_HEAVY
   };
   
   enum {
           IPOIB_ENCAP_LEN           = 4,
           IPOIB_HEADER_LEN          = IPOIB_ENCAP_LEN + INFINIBAND_ALEN,
           IPOIB_UD_MAX_MTU          = 4 * 1024,
           IPOIB_UD_RX_SG            = 2,  /* packet header and one cluster */
           IPOIB_UD_TX_SG            = (IPOIB_UD_MAX_MTU / MCLBYTES) + 2,
           IPOIB_CM_MAX_MTU          = (64 * 1024),
           IPOIB_CM_TX_SG            = (IPOIB_CM_MAX_MTU / MCLBYTES) + 2,
           IPOIB_CM_RX_SG            = (IPOIB_CM_MAX_MTU / MCLBYTES) + 2,
           IPOIB_RX_RING_SIZE        = 256,
           IPOIB_TX_RING_SIZE        = 128,
           IPOIB_MAX_RX_SG           = MAX(IPOIB_CM_RX_SG, IPOIB_UD_RX_SG),
           IPOIB_MAX_TX_SG           = MAX(IPOIB_CM_TX_SG, IPOIB_UD_TX_SG),
           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  = 16,
           IPOIB_MAX_MCAST_QUEUE     = 16,
   
           IPOIB_FLAG_OPER_UP        = 0,
           IPOIB_FLAG_INITIALIZED    = 1,
           IPOIB_FLAG_ADMIN_UP       = 2,
           IPOIB_PKEY_ASSIGNED       = 3,
           IPOIB_PKEY_STOP           = 4,
           IPOIB_FLAG_SUBINTERFACE   = 5,
           IPOIB_MCAST_RUN           = 6,
           IPOIB_STOP_REAPER         = 7,
           IPOIB_FLAG_UMCAST         = 10,
           IPOIB_FLAG_CSUM           = 11,
   
           IPOIB_MAX_BACKOFF_SECONDS = 16,
   
           IPOIB_MCAST_FLAG_FOUND    = 0,  /* used in set_multicast_list */
           IPOIB_MCAST_FLAG_SENDONLY = 1,
           IPOIB_MCAST_FLAG_BUSY     = 2,  /* joining or already joined */
           IPOIB_MCAST_FLAG_ATTACHED = 3,
   
           IPOIB_MAX_LRO_DESCRIPTORS = 8,
           IPOIB_LRO_MAX_AGGR        = 64,
   
           MAX_SEND_CQE              = 16,
           IPOIB_CM_COPYBREAK        = 256,
   };
   
   #define IPOIB_OP_RECV   (1ul << 31)
   #ifdef CONFIG_INFINIBAND_IPOIB_CM
   #define IPOIB_OP_CM     (1ul << 30)
   #else
   #define IPOIB_OP_CM     (0)
   #endif
   
   /* structs */
   
   struct ipoib_header {
           u8  hwaddr[INFINIBAND_ALEN];
           __be16  proto;
           u16     reserved;
   };
   
   struct ipoib_pseudoheader {
           u8  hwaddr[INFINIBAND_ALEN];
   };
   
   /* 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 flags;
           unsigned char logcount;
   
           struct ifqueue pkt_queue;
   
           struct ipoib_dev_priv *priv;
   };
   
   struct ipoib_cm_rx_buf {
           struct mbuf *mb;
           u64             mapping[IPOIB_CM_RX_SG];
   };
   
   struct ipoib_cm_tx_buf {
           struct mbuf *mb;
           u64             mapping[IPOIB_CM_TX_SG];
   };
   
   struct ipoib_rx_buf {
           struct mbuf *mb;
           u64             mapping[IPOIB_UD_RX_SG];
   };
   
   struct ipoib_tx_buf {
           struct mbuf *mb;
           u64             mapping[IPOIB_UD_TX_SG];
   };
   
   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 ipoib_dev_priv   *priv;
           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 ipoib_dev_priv *priv;
           struct ipoib_path   *path;
           struct ipoib_cm_tx_buf *tx_ring;
           unsigned             tx_head;
           unsigned             tx_tail;
           unsigned long        flags;
           u32                  mtu;       /* remote specified mtu, with grh. */
   };
   
   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      mb_task;
           struct work_struct      rx_reap_task;
           struct delayed_work     stale_task;
           struct ifqueue          mb_queue;
           struct list_head        start_list;
           struct list_head        reap_list;
           struct ib_sge           rx_sge[IPOIB_CM_RX_SG];
           struct ib_recv_wr       rx_wr;
           int                     nonsrq_conn_qp;
           int                     max_cm_mtu;     /* Actual buf size. */
           int                     num_frags;
   };
   
   struct ipoib_ethtool_st {
           u16     coalesce_usecs;
           u16     max_coalesced_frames;
   };
   
   /*
    * 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;
           spinlock_t drain_lock;
   
           struct ifnet *dev;
   
           u8 broadcastaddr[INFINIBAND_ALEN];
   
           unsigned long flags;
   
           int gone;
           int unit;
   
           struct mutex vlan_mutex;
   
           struct rb_root  path_tree;
           struct list_head path_list;
   
           struct ipoib_mcast *broadcast;
           struct list_head multicast_list;
           struct rb_root multicast_tree;
   
           struct delayed_work pkey_poll_task;
           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 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;
           u16          local_lid;
   
           unsigned int admin_mtu;         /* User selected MTU, no GRH. */
           unsigned int mcast_mtu;         /* Minus GRH bytes, from mcast group. */
           unsigned int max_ib_mtu;        /* Without header, actual buf size. */
   
           struct ipoib_rx_buf *rx_ring;
   
           struct ipoib_tx_buf *tx_ring;
           unsigned             tx_head;
           unsigned             tx_tail;
           struct ib_sge        tx_sge[IPOIB_MAX_TX_SG];
           struct ib_ud_wr      tx_wr;
           unsigned             tx_outstanding;
           struct ib_wc         send_wc[MAX_SEND_CQE];
   
           struct ib_recv_wr    rx_wr;
           struct ib_sge        rx_sge[IPOIB_MAX_RX_SG];
   
           struct ib_wc ibwc[IPOIB_NUM_WC];
   
           struct list_head dead_ahs;
   
           struct ib_event_handler event_handler;
   
           struct ifnet *parent;
           struct list_head child_intfs;
           struct list_head list;
   
   #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
           int     hca_caps;
           struct ipoib_ethtool_st ethtool;
           struct timer_list poll_timer;
   };
   
   struct ipoib_ah {
           struct ipoib_dev_priv *priv;
           struct ib_ah      *ah;
           struct list_head   list;
           struct kref        ref;
           unsigned           last_send;
   };
   
   struct ipoib_path {
           struct ipoib_dev_priv *priv;
           struct rb_node        rb_node;
           struct list_head      list;
   #ifdef CONFIG_INFINIBAND_IPOIB_CM
           uint8_t               hwaddr[INFINIBAND_ALEN];
           struct ipoib_cm_tx   *cm;
   #endif
           struct ipoib_ah      *ah;
           struct ib_sa_path_rec pathrec;
           struct ifqueue        queue;
   
           int                   query_id;
           struct ib_sa_query   *query;
           struct completion     done;
   
           int                   valid;
   };
   
   /* UD Only transmits encap len but we want the two sizes to be symmetrical. */
   #define IPOIB_UD_MTU(ib_mtu)            (ib_mtu - IPOIB_ENCAP_LEN)
   #define IPOIB_CM_MTU(ib_mtu)            (ib_mtu - 0x10)
   
   #define IPOIB_IS_MULTICAST(addr)        ((addr)[4] == 0xff)
   
   extern struct workqueue_struct *ipoib_workqueue;
   
   /* functions */
   void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr);
   void ipoib_send_comp_handler(struct ib_cq *cq, void *dev_ptr);
   
   struct ipoib_ah *ipoib_create_ah(struct ipoib_dev_priv *,
                                    struct ib_pd *pd, struct ib_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 ipoib_dev_priv *priv);
   int ipoib_add_pkey_attr(struct ipoib_dev_priv *priv);
   int ipoib_add_umcast_attr(struct ipoib_dev_priv *priv);
   
   void ipoib_send(struct ipoib_dev_priv *priv, struct mbuf *mb,
                   struct ipoib_ah *address, u32 qpn);
   void ipoib_reap_ah(struct work_struct *work);
   
   void ipoib_mark_paths_invalid(struct ipoib_dev_priv *priv);
   void ipoib_flush_paths(struct ipoib_dev_priv *priv);
   struct ipoib_dev_priv *ipoib_intf_alloc(const char *format);
   
   int ipoib_ib_dev_init(struct ipoib_dev_priv *priv, struct ib_device *ca,
       int port);
   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 ipoib_dev_priv *priv);
   
   int ipoib_ib_dev_open(struct ipoib_dev_priv *priv);
   int ipoib_ib_dev_up(struct ipoib_dev_priv *priv);
   int ipoib_ib_dev_down(struct ipoib_dev_priv *priv, int flush);
   int ipoib_ib_dev_stop(struct ipoib_dev_priv *priv, int flush);
   
   int ipoib_dev_init(struct ipoib_dev_priv *priv, struct ib_device *ca, int port);
   void ipoib_dev_cleanup(struct ipoib_dev_priv *priv);
   
   void ipoib_mcast_join_task(struct work_struct *work);
   void ipoib_mcast_carrier_on_task(struct work_struct *work);
   void ipoib_mcast_send(struct ipoib_dev_priv *priv, void *mgid, struct mbuf *mb);
   
   void ipoib_mcast_restart_task(struct work_struct *work);
   void ipoib_mcast_restart(struct ipoib_dev_priv *);
   int ipoib_mcast_start_thread(struct ipoib_dev_priv *priv);
   int ipoib_mcast_stop_thread(struct ipoib_dev_priv *priv, int flush);
   
   void ipoib_mcast_dev_down(struct ipoib_dev_priv *priv);
   void ipoib_mcast_dev_flush(struct ipoib_dev_priv *priv);
   
   void ipoib_path_free(struct ipoib_dev_priv *priv, struct ipoib_path *path);
   #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
   struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct ipoib_dev_priv *priv);
   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 ipoib_dev_priv *priv);
   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_change_mtu(struct ipoib_dev_priv *priv, int new_mtu, bool propagate);
   
   int ipoib_mcast_attach(struct ipoib_dev_priv *priv, u16 mlid,
                          union ib_gid *mgid, int set_qkey);
   
   int ipoib_init_qp(struct ipoib_dev_priv *priv);
   int ipoib_transport_dev_init(struct ipoib_dev_priv *priv, struct ib_device *ca);
   void ipoib_transport_dev_cleanup(struct ipoib_dev_priv *priv);
   
   void ipoib_event(struct ib_event_handler *handler,
                    struct ib_event *record);
   
   void ipoib_pkey_poll(struct work_struct *work);
   int ipoib_pkey_dev_delay_open(struct ipoib_dev_priv *priv);
   void ipoib_drain_cq(struct ipoib_dev_priv *priv);
   
   int ipoib_dma_map_tx(struct ib_device *ca, struct ipoib_tx_buf *tx_req, int max);
   void ipoib_dma_unmap_tx(struct ib_device *ca, struct ipoib_tx_buf *tx_req);
   int ipoib_poll_tx(struct ipoib_dev_priv *priv, bool do_start);
   
   void ipoib_dma_unmap_rx(struct ipoib_dev_priv *priv, struct ipoib_rx_buf *rx_req);
   void ipoib_dma_mb(struct ipoib_dev_priv *priv, struct mbuf *mb, unsigned int length);
   struct mbuf *ipoib_alloc_map_mb(struct ipoib_dev_priv *priv, struct ipoib_rx_buf *rx_req, int align, int size, int max_frags);
   
   
   void ipoib_set_ethtool_ops(struct ifnet *dev);
   int ipoib_set_dev_features(struct ipoib_dev_priv *priv, struct ib_device *hca);
   
   #ifdef CONFIG_INFINIBAND_IPOIB_CM
   
   #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))
   
   extern int ipoib_max_conn_qp;
   
   static inline int ipoib_cm_admin_enabled(struct ipoib_dev_priv *priv)
   {
           return IPOIB_CM_SUPPORTED(IF_LLADDR(priv->dev));
   }
   
   static inline int ipoib_cm_enabled(struct ipoib_dev_priv *priv, uint8_t *hwaddr)
   {
           return IPOIB_CM_SUPPORTED(hwaddr);
   }
   
   static inline int ipoib_cm_up(struct ipoib_path *path)
   
   {
           return test_bit(IPOIB_FLAG_OPER_UP, &path->cm->flags);
   }
   
   static inline struct ipoib_cm_tx *ipoib_cm_get(struct ipoib_path *path)
   {
           return path->cm;
   }
   
   static inline void ipoib_cm_set(struct ipoib_path *path, struct ipoib_cm_tx *tx)
   {
           path->cm = tx;
   }
   
   static inline int ipoib_cm_has_srq(struct ipoib_dev_priv *priv)
   {
           return !!priv->cm.srq;
   }
   
   static inline unsigned int ipoib_cm_max_mtu(struct ipoib_dev_priv *priv)
   {
           return priv->cm.max_cm_mtu;
   }
   
   void ipoib_cm_send(struct ipoib_dev_priv *priv, struct mbuf *mb, struct ipoib_cm_tx *tx);
   int ipoib_cm_dev_open(struct ipoib_dev_priv *priv);
   void ipoib_cm_dev_stop(struct ipoib_dev_priv *priv);
   int ipoib_cm_dev_init(struct ipoib_dev_priv *priv);
   int ipoib_cm_add_mode_attr(struct ipoib_dev_priv *priv);
   void ipoib_cm_dev_cleanup(struct ipoib_dev_priv *priv);
   struct ipoib_cm_tx *ipoib_cm_create_tx(struct ipoib_dev_priv *priv,
       struct ipoib_path *path);
   void ipoib_cm_destroy_tx(struct ipoib_cm_tx *tx);
   void ipoib_cm_mb_too_long(struct ipoib_dev_priv *priv, struct mbuf *mb,
                              unsigned int mtu);
   void ipoib_cm_handle_rx_wc(struct ipoib_dev_priv *priv, struct ib_wc *wc);
   void ipoib_cm_handle_tx_wc(struct ipoib_dev_priv *priv, struct ib_wc *wc);
   #else
   
   struct ipoib_cm_tx;
   
   #define ipoib_max_conn_qp 0
   
   static inline int ipoib_cm_admin_enabled(struct ipoib_dev_priv *priv)
   {
           return 0;
   }
   static inline int ipoib_cm_enabled(struct ipoib_dev_priv *priv, uint8_t *hwaddr)
   
   {
           return 0;
   }
   
   static inline int ipoib_cm_up(struct ipoib_path *path)
   
   {
           return 0;
   }
   
   static inline struct ipoib_cm_tx *ipoib_cm_get(struct ipoib_path *path)
   {
           return NULL;
   }
   
   static inline void ipoib_cm_set(struct ipoib_path *path, struct ipoib_cm_tx *tx)
   {
   }
   
   static inline int ipoib_cm_has_srq(struct ipoib_dev_priv *priv)
   {
           return 0;
   }
   
   static inline unsigned int ipoib_cm_max_mtu(struct ipoib_dev_priv *priv)
   {
           return 0;
   }
   
   static inline
   void ipoib_cm_send(struct ipoib_dev_priv *priv, struct mbuf *mb, struct ipoib_cm_tx *tx)
   {
           return;
   }
   
   static inline
   int ipoib_cm_dev_open(struct ipoib_dev_priv *priv)
   {
           return 0;
   }
   
   static inline
   void ipoib_cm_dev_stop(struct ipoib_dev_priv *priv)
   {
           return;
   }
   
   static inline
   int ipoib_cm_dev_init(struct ipoib_dev_priv *priv)
   {
           return -ENOSYS;
   }
   
   static inline
   void ipoib_cm_dev_cleanup(struct ipoib_dev_priv *priv)
   {
           return;
   }
   
   static inline
   struct ipoib_cm_tx *ipoib_cm_create_tx(struct ipoib_dev_priv *priv, struct ipoib_path *path)
   {
           return NULL;
   }
   
   static inline
   void ipoib_cm_destroy_tx(struct ipoib_cm_tx *tx)
   {
           return;
   }
   
   static inline
   int ipoib_cm_add_mode_attr(struct ipoib_dev_priv *priv)
   {
           return 0;
   }
   
   static inline void ipoib_cm_mb_too_long(struct ipoib_dev_priv *priv, struct mbuf *mb,
                                            unsigned int mtu)
   {
           m_freem(mb);
   }
   
   static inline void ipoib_cm_handle_rx_wc(struct ipoib_dev_priv *priv, struct ib_wc *wc)
   {
   }
   
   static inline void ipoib_cm_handle_tx_wc(struct ipoib_dev_priv *priv, struct ib_wc *wc)
   {
   }
   #endif
   
   #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
   void ipoib_create_debug_files(struct ipoib_dev_priv *priv);
   void ipoib_delete_debug_files(struct ipoib_dev_priv *priv);
   int ipoib_register_debugfs(void);
   void ipoib_unregister_debugfs(void);
   #else
   static inline void ipoib_create_debug_files(struct ipoib_dev_priv *priv) { }
   static inline void ipoib_delete_debug_files(struct ipoib_dev_priv *priv) { }
   static inline int ipoib_register_debugfs(void) { return 0; }
   static inline void ipoib_unregister_debugfs(void) { }
   #endif
   
   #define ipoib_printk(level, priv, format, arg...)       \
           printk(level "%s: " format, if_name(((struct ipoib_dev_priv *) priv)->dev), ## arg)
   #define ipoib_warn(priv, format, arg...)                \
           ipoib_printk(KERN_WARNING, priv, format , ## arg)
   
   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)
   
   void ipoib_start_locked(struct ifnet *, struct ipoib_dev_priv *);
   
   #endif /* _IPOIB_H */

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