1 /*
2  * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
3  * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
4  * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
5  *
6  * This software is available to you under a choice of one of two
7  * licenses.  You may choose to be licensed under the terms of the GNU
8  * General Public License (GPL) Version 2, available from the file
9  * COPYING in the main directory of this source tree, or the
10  * OpenIB.org BSD license below:
11  *
12  *     Redistribution and use in source and binary forms, with or
13  *     without modification, are permitted provided that the following
14  *     conditions are met:
15  *
16  *      - Redistributions of source code must retain the above
17  *        copyright notice, this list of conditions and the following
18  *        disclaimer.
19  *
20  *      - Redistributions in binary form must reproduce the above
21  *        copyright notice, this list of conditions and the following
22  *        disclaimer in the documentation and/or other materials
23  *        provided with the distribution.
24  *
25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32  * SOFTWARE.
33  */
34 
35 #ifndef _IPOIB_H
36 #define _IPOIB_H
37 
38 #include <linux/list.h>
39 #include <linux/skbuff.h>
40 #include <linux/netdevice.h>
41 #include <linux/workqueue.h>
42 #include <linux/kref.h>
43 #include <linux/if_infiniband.h>
44 #include <linux/mutex.h>
45 
46 #include <net/neighbour.h>
47 #include <net/sch_generic.h>
48 
49 #include <linux/atomic.h>
50 
51 #include <rdma/ib_verbs.h>
52 #include <rdma/ib_pack.h>
53 #include <rdma/ib_sa.h>
54 #include <linux/sched.h>
55 
56 /* constants */
57 
58 enum ipoib_flush_level {
59 	IPOIB_FLUSH_LIGHT,
60 	IPOIB_FLUSH_NORMAL,
61 	IPOIB_FLUSH_HEAVY
62 };
63 
64 enum {
65 	IPOIB_ENCAP_LEN		  = 4,
66 
67 	IPOIB_UD_HEAD_SIZE	  = IB_GRH_BYTES + IPOIB_ENCAP_LEN,
68 	IPOIB_UD_RX_SG		  = 2, /* max buffer needed for 4K mtu */
69 
70 	IPOIB_CM_MTU		  = 0x10000 - 0x10, /* padding to align header to 16 */
71 	IPOIB_CM_BUF_SIZE	  = IPOIB_CM_MTU  + IPOIB_ENCAP_LEN,
72 	IPOIB_CM_HEAD_SIZE	  = IPOIB_CM_BUF_SIZE % PAGE_SIZE,
73 	IPOIB_CM_RX_SG		  = ALIGN(IPOIB_CM_BUF_SIZE, PAGE_SIZE) / PAGE_SIZE,
74 	IPOIB_RX_RING_SIZE	  = 256,
75 	IPOIB_TX_RING_SIZE	  = 128,
76 	IPOIB_MAX_QUEUE_SIZE	  = 8192,
77 	IPOIB_MIN_QUEUE_SIZE	  = 2,
78 	IPOIB_CM_MAX_CONN_QP	  = 4096,
79 
80 	IPOIB_NUM_WC		  = 4,
81 
82 	IPOIB_MAX_PATH_REC_QUEUE  = 3,
83 	IPOIB_MAX_MCAST_QUEUE	  = 3,
84 
85 	IPOIB_FLAG_OPER_UP	  = 0,
86 	IPOIB_FLAG_INITIALIZED	  = 1,
87 	IPOIB_FLAG_ADMIN_UP	  = 2,
88 	IPOIB_PKEY_ASSIGNED	  = 3,
89 	IPOIB_FLAG_SUBINTERFACE	  = 5,
90 	IPOIB_STOP_REAPER	  = 7,
91 	IPOIB_FLAG_ADMIN_CM	  = 9,
92 	IPOIB_FLAG_UMCAST	  = 10,
93 	IPOIB_STOP_NEIGH_GC	  = 11,
94 	IPOIB_NEIGH_TBL_FLUSH	  = 12,
95 
96 	IPOIB_MAX_BACKOFF_SECONDS = 16,
97 
98 	IPOIB_MCAST_FLAG_FOUND	  = 0,	/* used in set_multicast_list */
99 	IPOIB_MCAST_FLAG_SENDONLY = 1,
100 	/*
101 	 * For IPOIB_MCAST_FLAG_BUSY
102 	 * When set, in flight join and mcast->mc is unreliable
103 	 * When clear and mcast->mc IS_ERR_OR_NULL, need to restart or
104 	 *   haven't started yet
105 	 * When clear and mcast->mc is valid pointer, join was successful
106 	 */
107 	IPOIB_MCAST_FLAG_BUSY	  = 2,
108 	IPOIB_MCAST_FLAG_ATTACHED = 3,
109 
110 	MAX_SEND_CQE		  = 16,
111 	IPOIB_CM_COPYBREAK	  = 256,
112 
113 	IPOIB_NON_CHILD		  = 0,
114 	IPOIB_LEGACY_CHILD	  = 1,
115 	IPOIB_RTNL_CHILD	  = 2,
116 };
117 
118 #define	IPOIB_OP_RECV   (1ul << 31)
119 #ifdef CONFIG_INFINIBAND_IPOIB_CM
120 #define	IPOIB_OP_CM     (1ul << 30)
121 #else
122 #define	IPOIB_OP_CM     (0)
123 #endif
124 
125 #define IPOIB_QPN_MASK ((__force u32) cpu_to_be32(0xFFFFFF))
126 
127 /* structs */
128 
129 struct ipoib_header {
130 	__be16	proto;
131 	u16	reserved;
132 };
133 
134 struct ipoib_cb {
135 	struct qdisc_skb_cb	qdisc_cb;
136 	u8			hwaddr[INFINIBAND_ALEN];
137 };
138 
139 static inline struct ipoib_cb *ipoib_skb_cb(const struct sk_buff *skb)
140 {
141 	BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct ipoib_cb));
142 	return (struct ipoib_cb *)skb->cb;
143 }
144 
145 /* Used for all multicast joins (broadcast, IPv4 mcast and IPv6 mcast) */
146 struct ipoib_mcast {
147 	struct ib_sa_mcmember_rec mcmember;
148 	struct ib_sa_multicast	 *mc;
149 	struct ipoib_ah		 *ah;
150 
151 	struct rb_node    rb_node;
152 	struct list_head  list;
153 
154 	unsigned long created;
155 	unsigned long backoff;
156 	unsigned long delay_until;
157 
158 	unsigned long flags;
159 	unsigned char logcount;
160 
161 	struct list_head  neigh_list;
162 
163 	struct sk_buff_head pkt_queue;
164 
165 	struct net_device *dev;
166 	struct completion done;
167 };
168 
169 struct ipoib_rx_buf {
170 	struct sk_buff *skb;
171 	u64		mapping[IPOIB_UD_RX_SG];
172 };
173 
174 struct ipoib_tx_buf {
175 	struct sk_buff *skb;
176 	u64		mapping[MAX_SKB_FRAGS + 1];
177 };
178 
179 struct ipoib_cm_tx_buf {
180 	struct sk_buff *skb;
181 	u64		mapping;
182 };
183 
184 struct ib_cm_id;
185 
186 struct ipoib_cm_data {
187 	__be32 qpn; /* High byte MUST be ignored on receive */
188 	__be32 mtu;
189 };
190 
191 /*
192  * Quoting 10.3.1 Queue Pair and EE Context States:
193  *
194  * Note, for QPs that are associated with an SRQ, the Consumer should take the
195  * QP through the Error State before invoking a Destroy QP or a Modify QP to the
196  * Reset State.  The Consumer may invoke the Destroy QP without first performing
197  * a Modify QP to the Error State and waiting for the Affiliated Asynchronous
198  * Last WQE Reached Event. However, if the Consumer does not wait for the
199  * Affiliated Asynchronous Last WQE Reached Event, then WQE and Data Segment
200  * leakage may occur. Therefore, it is good programming practice to tear down a
201  * QP that is associated with an SRQ by using the following process:
202  *
203  * - Put the QP in the Error State
204  * - Wait for the Affiliated Asynchronous Last WQE Reached Event;
205  * - either:
206  *       drain the CQ by invoking the Poll CQ verb and either wait for CQ
207  *       to be empty or the number of Poll CQ operations has exceeded
208  *       CQ capacity size;
209  * - or
210  *       post another WR that completes on the same CQ and wait for this
211  *       WR to return as a WC;
212  * - and then invoke a Destroy QP or Reset QP.
213  *
214  * We use the second option and wait for a completion on the
215  * same CQ before destroying QPs attached to our SRQ.
216  */
217 
218 enum ipoib_cm_state {
219 	IPOIB_CM_RX_LIVE,
220 	IPOIB_CM_RX_ERROR, /* Ignored by stale task */
221 	IPOIB_CM_RX_FLUSH  /* Last WQE Reached event observed */
222 };
223 
224 struct ipoib_cm_rx {
225 	struct ib_cm_id	       *id;
226 	struct ib_qp	       *qp;
227 	struct ipoib_cm_rx_buf *rx_ring;
228 	struct list_head	list;
229 	struct net_device      *dev;
230 	unsigned long		jiffies;
231 	enum ipoib_cm_state	state;
232 	int			recv_count;
233 };
234 
235 struct ipoib_cm_tx {
236 	struct ib_cm_id	    *id;
237 	struct ib_qp	    *qp;
238 	struct list_head     list;
239 	struct net_device   *dev;
240 	struct ipoib_neigh  *neigh;
241 	struct ipoib_path   *path;
242 	struct ipoib_cm_tx_buf *tx_ring;
243 	unsigned	     tx_head;
244 	unsigned	     tx_tail;
245 	unsigned long	     flags;
246 	u32		     mtu;
247 };
248 
249 struct ipoib_cm_rx_buf {
250 	struct sk_buff *skb;
251 	u64 mapping[IPOIB_CM_RX_SG];
252 };
253 
254 struct ipoib_cm_dev_priv {
255 	struct ib_srq	       *srq;
256 	struct ipoib_cm_rx_buf *srq_ring;
257 	struct ib_cm_id	       *id;
258 	struct list_head	passive_ids;   /* state: LIVE */
259 	struct list_head	rx_error_list; /* state: ERROR */
260 	struct list_head	rx_flush_list; /* state: FLUSH, drain not started */
261 	struct list_head	rx_drain_list; /* state: FLUSH, drain started */
262 	struct list_head	rx_reap_list;  /* state: FLUSH, drain done */
263 	struct work_struct      start_task;
264 	struct work_struct      reap_task;
265 	struct work_struct      skb_task;
266 	struct work_struct      rx_reap_task;
267 	struct delayed_work     stale_task;
268 	struct sk_buff_head     skb_queue;
269 	struct list_head	start_list;
270 	struct list_head	reap_list;
271 	struct ib_wc		ibwc[IPOIB_NUM_WC];
272 	struct ib_sge		rx_sge[IPOIB_CM_RX_SG];
273 	struct ib_recv_wr       rx_wr;
274 	int			nonsrq_conn_qp;
275 	int			max_cm_mtu;
276 	int			num_frags;
277 };
278 
279 struct ipoib_ethtool_st {
280 	u16     coalesce_usecs;
281 	u16     max_coalesced_frames;
282 };
283 
284 struct ipoib_neigh_table;
285 
286 struct ipoib_neigh_hash {
287 	struct ipoib_neigh_table       *ntbl;
288 	struct ipoib_neigh __rcu      **buckets;
289 	struct rcu_head			rcu;
290 	u32				mask;
291 	u32				size;
292 };
293 
294 struct ipoib_neigh_table {
295 	struct ipoib_neigh_hash __rcu  *htbl;
296 	atomic_t			entries;
297 	struct completion		flushed;
298 	struct completion		deleted;
299 };
300 
301 struct ipoib_qp_state_validate {
302 	struct work_struct work;
303 	struct ipoib_dev_priv   *priv;
304 };
305 
306 /*
307  * Device private locking: network stack tx_lock protects members used
308  * in TX fast path, lock protects everything else.  lock nests inside
309  * of tx_lock (ie tx_lock must be acquired first if needed).
310  */
311 struct ipoib_dev_priv {
312 	spinlock_t lock;
313 
314 	struct net_device *dev;
315 
316 	struct napi_struct napi;
317 
318 	unsigned long flags;
319 
320 	struct rw_semaphore vlan_rwsem;
321 
322 	struct rb_root  path_tree;
323 	struct list_head path_list;
324 
325 	struct ipoib_neigh_table ntbl;
326 
327 	struct ipoib_mcast *broadcast;
328 	struct list_head multicast_list;
329 	struct rb_root multicast_tree;
330 
331 	struct workqueue_struct *wq;
332 	struct delayed_work mcast_task;
333 	struct work_struct carrier_on_task;
334 	struct work_struct flush_light;
335 	struct work_struct flush_normal;
336 	struct work_struct flush_heavy;
337 	struct work_struct restart_task;
338 	struct delayed_work ah_reap_task;
339 	struct delayed_work neigh_reap_task;
340 	struct ib_device *ca;
341 	u8		  port;
342 	u16		  pkey;
343 	u16		  pkey_index;
344 	struct ib_pd	 *pd;
345 	struct ib_mr	 *mr;
346 	struct ib_cq	 *recv_cq;
347 	struct ib_cq	 *send_cq;
348 	struct ib_qp	 *qp;
349 	u32		  qkey;
350 
351 	union ib_gid local_gid;
352 	u16	     local_lid;
353 
354 	unsigned int admin_mtu;
355 	unsigned int mcast_mtu;
356 	unsigned int max_ib_mtu;
357 
358 	struct ipoib_rx_buf *rx_ring;
359 
360 	struct ipoib_tx_buf *tx_ring;
361 	unsigned	     tx_head;
362 	unsigned	     tx_tail;
363 	struct ib_sge	     tx_sge[MAX_SKB_FRAGS + 1];
364 	struct ib_send_wr    tx_wr;
365 	unsigned	     tx_outstanding;
366 	struct ib_wc	     send_wc[MAX_SEND_CQE];
367 
368 	struct ib_recv_wr    rx_wr;
369 	struct ib_sge	     rx_sge[IPOIB_UD_RX_SG];
370 
371 	struct ib_wc ibwc[IPOIB_NUM_WC];
372 
373 	struct list_head dead_ahs;
374 
375 	struct ib_event_handler event_handler;
376 
377 	struct net_device *parent;
378 	struct list_head child_intfs;
379 	struct list_head list;
380 	int    child_type;
381 
382 #ifdef CONFIG_INFINIBAND_IPOIB_CM
383 	struct ipoib_cm_dev_priv cm;
384 #endif
385 
386 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
387 	struct list_head fs_list;
388 	struct dentry *mcg_dentry;
389 	struct dentry *path_dentry;
390 #endif
391 	int	hca_caps;
392 	struct ipoib_ethtool_st ethtool;
393 	struct timer_list poll_timer;
394 };
395 
396 struct ipoib_ah {
397 	struct net_device *dev;
398 	struct ib_ah	  *ah;
399 	struct list_head   list;
400 	struct kref	   ref;
401 	unsigned	   last_send;
402 };
403 
404 struct ipoib_path {
405 	struct net_device    *dev;
406 	struct ib_sa_path_rec pathrec;
407 	struct ipoib_ah      *ah;
408 	struct sk_buff_head   queue;
409 
410 	struct list_head      neigh_list;
411 
412 	int		      query_id;
413 	struct ib_sa_query   *query;
414 	struct completion     done;
415 
416 	struct rb_node	      rb_node;
417 	struct list_head      list;
418 	int  		      valid;
419 };
420 
421 struct ipoib_neigh {
422 	struct ipoib_ah    *ah;
423 #ifdef CONFIG_INFINIBAND_IPOIB_CM
424 	struct ipoib_cm_tx *cm;
425 #endif
426 	u8     daddr[INFINIBAND_ALEN];
427 	struct sk_buff_head queue;
428 
429 	struct net_device *dev;
430 
431 	struct list_head    list;
432 	struct ipoib_neigh __rcu *hnext;
433 	struct rcu_head     rcu;
434 	atomic_t	    refcnt;
435 	unsigned long       alive;
436 };
437 
438 #define IPOIB_UD_MTU(ib_mtu)		(ib_mtu - IPOIB_ENCAP_LEN)
439 #define IPOIB_UD_BUF_SIZE(ib_mtu)	(ib_mtu + IB_GRH_BYTES)
440 
441 void ipoib_neigh_dtor(struct ipoib_neigh *neigh);
442 static inline void ipoib_neigh_put(struct ipoib_neigh *neigh)
443 {
444 	if (atomic_dec_and_test(&neigh->refcnt))
445 		ipoib_neigh_dtor(neigh);
446 }
447 struct ipoib_neigh *ipoib_neigh_get(struct net_device *dev, u8 *daddr);
448 struct ipoib_neigh *ipoib_neigh_alloc(u8 *daddr,
449 				      struct net_device *dev);
450 void ipoib_neigh_free(struct ipoib_neigh *neigh);
451 void ipoib_del_neighs_by_gid(struct net_device *dev, u8 *gid);
452 
453 extern struct workqueue_struct *ipoib_workqueue;
454 
455 /* functions */
456 
457 int ipoib_poll(struct napi_struct *napi, int budget);
458 void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr);
459 void ipoib_send_comp_handler(struct ib_cq *cq, void *dev_ptr);
460 
461 struct ipoib_ah *ipoib_create_ah(struct net_device *dev,
462 				 struct ib_pd *pd, struct ib_ah_attr *attr);
463 void ipoib_free_ah(struct kref *kref);
464 static inline void ipoib_put_ah(struct ipoib_ah *ah)
465 {
466 	kref_put(&ah->ref, ipoib_free_ah);
467 }
468 int ipoib_open(struct net_device *dev);
469 int ipoib_add_pkey_attr(struct net_device *dev);
470 int ipoib_add_umcast_attr(struct net_device *dev);
471 
472 void ipoib_send(struct net_device *dev, struct sk_buff *skb,
473 		struct ipoib_ah *address, u32 qpn);
474 void ipoib_reap_ah(struct work_struct *work);
475 
476 void ipoib_mark_paths_invalid(struct net_device *dev);
477 void ipoib_flush_paths(struct net_device *dev);
478 struct ipoib_dev_priv *ipoib_intf_alloc(const char *format);
479 
480 int ipoib_ib_dev_init(struct net_device *dev, struct ib_device *ca, int port);
481 void ipoib_ib_dev_flush_light(struct work_struct *work);
482 void ipoib_ib_dev_flush_normal(struct work_struct *work);
483 void ipoib_ib_dev_flush_heavy(struct work_struct *work);
484 void ipoib_pkey_event(struct work_struct *work);
485 void ipoib_ib_dev_cleanup(struct net_device *dev);
486 
487 int ipoib_ib_dev_open(struct net_device *dev);
488 int ipoib_ib_dev_up(struct net_device *dev);
489 int ipoib_ib_dev_down(struct net_device *dev);
490 int ipoib_ib_dev_stop(struct net_device *dev);
491 void ipoib_pkey_dev_check_presence(struct net_device *dev);
492 
493 int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port);
494 void ipoib_dev_cleanup(struct net_device *dev);
495 
496 void ipoib_mcast_join_task(struct work_struct *work);
497 void ipoib_mcast_carrier_on_task(struct work_struct *work);
498 void ipoib_mcast_send(struct net_device *dev, u8 *daddr, struct sk_buff *skb);
499 
500 void ipoib_mcast_restart_task(struct work_struct *work);
501 int ipoib_mcast_start_thread(struct net_device *dev);
502 int ipoib_mcast_stop_thread(struct net_device *dev);
503 
504 void ipoib_mcast_dev_down(struct net_device *dev);
505 void ipoib_mcast_dev_flush(struct net_device *dev);
506 
507 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
508 struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev);
509 int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter);
510 void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter,
511 				  union ib_gid *gid,
512 				  unsigned long *created,
513 				  unsigned int *queuelen,
514 				  unsigned int *complete,
515 				  unsigned int *send_only);
516 
517 struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev);
518 int ipoib_path_iter_next(struct ipoib_path_iter *iter);
519 void ipoib_path_iter_read(struct ipoib_path_iter *iter,
520 			  struct ipoib_path *path);
521 #endif
522 
523 int ipoib_mcast_attach(struct net_device *dev, u16 mlid,
524 		       union ib_gid *mgid, int set_qkey);
525 
526 int ipoib_init_qp(struct net_device *dev);
527 int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca);
528 void ipoib_transport_dev_cleanup(struct net_device *dev);
529 
530 void ipoib_event(struct ib_event_handler *handler,
531 		 struct ib_event *record);
532 
533 int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey);
534 int ipoib_vlan_delete(struct net_device *pdev, unsigned short pkey);
535 
536 int __ipoib_vlan_add(struct ipoib_dev_priv *ppriv, struct ipoib_dev_priv *priv,
537 		     u16 pkey, int child_type);
538 
539 int  __init ipoib_netlink_init(void);
540 void __exit ipoib_netlink_fini(void);
541 
542 void ipoib_set_umcast(struct net_device *ndev, int umcast_val);
543 int  ipoib_set_mode(struct net_device *dev, const char *buf);
544 
545 void ipoib_setup(struct net_device *dev);
546 
547 void ipoib_pkey_open(struct ipoib_dev_priv *priv);
548 void ipoib_drain_cq(struct net_device *dev);
549 
550 void ipoib_set_ethtool_ops(struct net_device *dev);
551 int ipoib_set_dev_features(struct ipoib_dev_priv *priv, struct ib_device *hca);
552 
553 #define IPOIB_FLAGS_RC		0x80
554 #define IPOIB_FLAGS_UC		0x40
555 
556 /* We don't support UC connections at the moment */
557 #define IPOIB_CM_SUPPORTED(ha)   (ha[0] & (IPOIB_FLAGS_RC))
558 
559 #ifdef CONFIG_INFINIBAND_IPOIB_CM
560 
561 extern int ipoib_max_conn_qp;
562 
563 static inline int ipoib_cm_admin_enabled(struct net_device *dev)
564 {
565 	struct ipoib_dev_priv *priv = netdev_priv(dev);
566 	return IPOIB_CM_SUPPORTED(dev->dev_addr) &&
567 		test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
568 }
569 
570 static inline int ipoib_cm_enabled(struct net_device *dev, u8 *hwaddr)
571 {
572 	struct ipoib_dev_priv *priv = netdev_priv(dev);
573 	return IPOIB_CM_SUPPORTED(hwaddr) &&
574 		test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
575 }
576 
577 static inline int ipoib_cm_up(struct ipoib_neigh *neigh)
578 
579 {
580 	return test_bit(IPOIB_FLAG_OPER_UP, &neigh->cm->flags);
581 }
582 
583 static inline struct ipoib_cm_tx *ipoib_cm_get(struct ipoib_neigh *neigh)
584 {
585 	return neigh->cm;
586 }
587 
588 static inline void ipoib_cm_set(struct ipoib_neigh *neigh, struct ipoib_cm_tx *tx)
589 {
590 	neigh->cm = tx;
591 }
592 
593 static inline int ipoib_cm_has_srq(struct net_device *dev)
594 {
595 	struct ipoib_dev_priv *priv = netdev_priv(dev);
596 	return !!priv->cm.srq;
597 }
598 
599 static inline unsigned int ipoib_cm_max_mtu(struct net_device *dev)
600 {
601 	struct ipoib_dev_priv *priv = netdev_priv(dev);
602 	return priv->cm.max_cm_mtu;
603 }
604 
605 void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_tx *tx);
606 int ipoib_cm_dev_open(struct net_device *dev);
607 void ipoib_cm_dev_stop(struct net_device *dev);
608 int ipoib_cm_dev_init(struct net_device *dev);
609 int ipoib_cm_add_mode_attr(struct net_device *dev);
610 void ipoib_cm_dev_cleanup(struct net_device *dev);
611 struct ipoib_cm_tx *ipoib_cm_create_tx(struct net_device *dev, struct ipoib_path *path,
612 				    struct ipoib_neigh *neigh);
613 void ipoib_cm_destroy_tx(struct ipoib_cm_tx *tx);
614 void ipoib_cm_skb_too_long(struct net_device *dev, struct sk_buff *skb,
615 			   unsigned int mtu);
616 void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc);
617 void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc);
618 #else
619 
620 struct ipoib_cm_tx;
621 
622 #define ipoib_max_conn_qp 0
623 
624 static inline int ipoib_cm_admin_enabled(struct net_device *dev)
625 {
626 	return 0;
627 }
628 static inline int ipoib_cm_enabled(struct net_device *dev, u8 *hwaddr)
629 
630 {
631 	return 0;
632 }
633 
634 static inline int ipoib_cm_up(struct ipoib_neigh *neigh)
635 
636 {
637 	return 0;
638 }
639 
640 static inline struct ipoib_cm_tx *ipoib_cm_get(struct ipoib_neigh *neigh)
641 {
642 	return NULL;
643 }
644 
645 static inline void ipoib_cm_set(struct ipoib_neigh *neigh, struct ipoib_cm_tx *tx)
646 {
647 }
648 
649 static inline int ipoib_cm_has_srq(struct net_device *dev)
650 {
651 	return 0;
652 }
653 
654 static inline unsigned int ipoib_cm_max_mtu(struct net_device *dev)
655 {
656 	return 0;
657 }
658 
659 static inline
660 void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_tx *tx)
661 {
662 	return;
663 }
664 
665 static inline
666 int ipoib_cm_dev_open(struct net_device *dev)
667 {
668 	return 0;
669 }
670 
671 static inline
672 void ipoib_cm_dev_stop(struct net_device *dev)
673 {
674 	return;
675 }
676 
677 static inline
678 int ipoib_cm_dev_init(struct net_device *dev)
679 {
680 	return -ENOSYS;
681 }
682 
683 static inline
684 void ipoib_cm_dev_cleanup(struct net_device *dev)
685 {
686 	return;
687 }
688 
689 static inline
690 struct ipoib_cm_tx *ipoib_cm_create_tx(struct net_device *dev, struct ipoib_path *path,
691 				    struct ipoib_neigh *neigh)
692 {
693 	return NULL;
694 }
695 
696 static inline
697 void ipoib_cm_destroy_tx(struct ipoib_cm_tx *tx)
698 {
699 	return;
700 }
701 
702 static inline
703 int ipoib_cm_add_mode_attr(struct net_device *dev)
704 {
705 	return 0;
706 }
707 
708 static inline void ipoib_cm_skb_too_long(struct net_device *dev, struct sk_buff *skb,
709 					 unsigned int mtu)
710 {
711 	dev_kfree_skb_any(skb);
712 }
713 
714 static inline void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc)
715 {
716 }
717 
718 static inline void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
719 {
720 }
721 #endif
722 
723 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
724 void ipoib_create_debug_files(struct net_device *dev);
725 void ipoib_delete_debug_files(struct net_device *dev);
726 int ipoib_register_debugfs(void);
727 void ipoib_unregister_debugfs(void);
728 #else
729 static inline void ipoib_create_debug_files(struct net_device *dev) { }
730 static inline void ipoib_delete_debug_files(struct net_device *dev) { }
731 static inline int ipoib_register_debugfs(void) { return 0; }
732 static inline void ipoib_unregister_debugfs(void) { }
733 #endif
734 
735 #define ipoib_printk(level, priv, format, arg...)	\
736 	printk(level "%s: " format, ((struct ipoib_dev_priv *) priv)->dev->name , ## arg)
737 #define ipoib_warn(priv, format, arg...)		\
738 	ipoib_printk(KERN_WARNING, priv, format , ## arg)
739 
740 extern int ipoib_sendq_size;
741 extern int ipoib_recvq_size;
742 
743 extern struct ib_sa_client ipoib_sa_client;
744 
745 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
746 extern int ipoib_debug_level;
747 
748 #define ipoib_dbg(priv, format, arg...)			\
749 	do {						\
750 		if (ipoib_debug_level > 0)			\
751 			ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
752 	} while (0)
753 #define ipoib_dbg_mcast(priv, format, arg...)		\
754 	do {						\
755 		if (mcast_debug_level > 0)		\
756 			ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
757 	} while (0)
758 #else /* CONFIG_INFINIBAND_IPOIB_DEBUG */
759 #define ipoib_dbg(priv, format, arg...)			\
760 	do { (void) (priv); } while (0)
761 #define ipoib_dbg_mcast(priv, format, arg...)		\
762 	do { (void) (priv); } while (0)
763 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
764 
765 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA
766 #define ipoib_dbg_data(priv, format, arg...)		\
767 	do {						\
768 		if (data_debug_level > 0)		\
769 			ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
770 	} while (0)
771 #else /* CONFIG_INFINIBAND_IPOIB_DEBUG_DATA */
772 #define ipoib_dbg_data(priv, format, arg...)		\
773 	do { (void) (priv); } while (0)
774 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG_DATA */
775 
776 #define IPOIB_QPN(ha) (be32_to_cpup((__be32 *) ha) & 0xffffff)
777 
778 extern const char ipoib_driver_version[];
779 
780 #endif /* _IPOIB_H */
781