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 /* constants */
56 
57 enum ipoib_flush_level {
58 	IPOIB_FLUSH_LIGHT,
59 	IPOIB_FLUSH_NORMAL,
60 	IPOIB_FLUSH_HEAVY
61 };
62 
63 enum {
64 	IPOIB_ENCAP_LEN		  = 4,
65 	IPOIB_PSEUDO_LEN	  = 20,
66 	IPOIB_HARD_LEN		  = IPOIB_ENCAP_LEN + IPOIB_PSEUDO_LEN,
67 
68 	IPOIB_UD_HEAD_SIZE	  = IB_GRH_BYTES + IPOIB_ENCAP_LEN,
69 	IPOIB_UD_RX_SG		  = 2, /* max buffer needed for 4K mtu */
70 
71 	IPOIB_CM_MTU		  = 0x10000 - 0x10, /* padding to align header to 16 */
72 	IPOIB_CM_BUF_SIZE	  = IPOIB_CM_MTU  + IPOIB_ENCAP_LEN,
73 	IPOIB_CM_HEAD_SIZE	  = IPOIB_CM_BUF_SIZE % PAGE_SIZE,
74 	IPOIB_CM_RX_SG		  = ALIGN(IPOIB_CM_BUF_SIZE, PAGE_SIZE) / PAGE_SIZE,
75 	IPOIB_RX_RING_SIZE	  = 256,
76 	IPOIB_TX_RING_SIZE	  = 128,
77 	IPOIB_MAX_QUEUE_SIZE	  = 8192,
78 	IPOIB_MIN_QUEUE_SIZE	  = 2,
79 	IPOIB_CM_MAX_CONN_QP	  = 4096,
80 
81 	IPOIB_NUM_WC		  = 4,
82 
83 	IPOIB_MAX_PATH_REC_QUEUE  = 3,
84 	IPOIB_MAX_MCAST_QUEUE	  = 64,
85 
86 	IPOIB_FLAG_OPER_UP	  = 0,
87 	IPOIB_FLAG_INITIALIZED	  = 1,
88 	IPOIB_FLAG_ADMIN_UP	  = 2,
89 	IPOIB_PKEY_ASSIGNED	  = 3,
90 	IPOIB_FLAG_SUBINTERFACE	  = 5,
91 	IPOIB_STOP_REAPER	  = 7,
92 	IPOIB_FLAG_ADMIN_CM	  = 9,
93 	IPOIB_FLAG_UMCAST	  = 10,
94 	IPOIB_NEIGH_TBL_FLUSH	  = 12,
95 	IPOIB_FLAG_DEV_ADDR_SET	  = 13,
96 	IPOIB_FLAG_DEV_ADDR_CTRL  = 14,
97 
98 	IPOIB_MAX_BACKOFF_SECONDS = 16,
99 
100 	IPOIB_MCAST_FLAG_FOUND	  = 0,	/* used in set_multicast_list */
101 	IPOIB_MCAST_FLAG_SENDONLY = 1,
102 	/*
103 	 * For IPOIB_MCAST_FLAG_BUSY
104 	 * When set, in flight join and mcast->mc is unreliable
105 	 * When clear and mcast->mc IS_ERR_OR_NULL, need to restart or
106 	 *   haven't started yet
107 	 * When clear and mcast->mc is valid pointer, join was successful
108 	 */
109 	IPOIB_MCAST_FLAG_BUSY	  = 2,
110 	IPOIB_MCAST_FLAG_ATTACHED = 3,
111 
112 	MAX_SEND_CQE		  = 64,
113 	IPOIB_CM_COPYBREAK	  = 256,
114 
115 	IPOIB_NON_CHILD		  = 0,
116 	IPOIB_LEGACY_CHILD	  = 1,
117 	IPOIB_RTNL_CHILD	  = 2,
118 };
119 
120 #define	IPOIB_OP_RECV   (1ul << 31)
121 #ifdef CONFIG_INFINIBAND_IPOIB_CM
122 #define	IPOIB_OP_CM     (1ul << 30)
123 #else
124 #define	IPOIB_OP_CM     (0)
125 #endif
126 
127 #define IPOIB_QPN_MASK ((__force u32) cpu_to_be32(0xFFFFFF))
128 
129 /* structs */
130 
131 struct ipoib_header {
132 	__be16	proto;
133 	u16	reserved;
134 };
135 
136 struct ipoib_pseudo_header {
137 	u8	hwaddr[INFINIBAND_ALEN];
138 };
139 
140 static inline void skb_add_pseudo_hdr(struct sk_buff *skb)
141 {
142 	char *data = skb_push(skb, IPOIB_PSEUDO_LEN);
143 
144 	/*
145 	 * only the ipoib header is present now, make room for a dummy
146 	 * pseudo header and set skb field accordingly
147 	 */
148 	memset(data, 0, IPOIB_PSEUDO_LEN);
149 	skb_reset_mac_header(skb);
150 	skb_pull(skb, IPOIB_HARD_LEN);
151 }
152 
153 static inline struct ipoib_dev_priv *ipoib_priv(const struct net_device *dev)
154 {
155 	struct rdma_netdev *rn = netdev_priv(dev);
156 
157 	return rn->clnt_priv;
158 }
159 
160 /* Used for all multicast joins (broadcast, IPv4 mcast and IPv6 mcast) */
161 struct ipoib_mcast {
162 	struct ib_sa_mcmember_rec mcmember;
163 	struct ib_sa_multicast	 *mc;
164 	struct ipoib_ah		 *ah;
165 
166 	struct rb_node    rb_node;
167 	struct list_head  list;
168 
169 	unsigned long created;
170 	unsigned long backoff;
171 	unsigned long delay_until;
172 
173 	unsigned long flags;
174 	unsigned char logcount;
175 
176 	struct list_head  neigh_list;
177 
178 	struct sk_buff_head pkt_queue;
179 
180 	struct net_device *dev;
181 	struct completion done;
182 };
183 
184 struct ipoib_rx_buf {
185 	struct sk_buff *skb;
186 	u64		mapping[IPOIB_UD_RX_SG];
187 };
188 
189 struct ipoib_tx_buf {
190 	struct sk_buff *skb;
191 	u64		mapping[MAX_SKB_FRAGS + 1];
192 };
193 
194 struct ib_cm_id;
195 
196 struct ipoib_cm_data {
197 	__be32 qpn; /* High byte MUST be ignored on receive */
198 	__be32 mtu;
199 };
200 
201 /*
202  * Quoting 10.3.1 Queue Pair and EE Context States:
203  *
204  * Note, for QPs that are associated with an SRQ, the Consumer should take the
205  * QP through the Error State before invoking a Destroy QP or a Modify QP to the
206  * Reset State.  The Consumer may invoke the Destroy QP without first performing
207  * a Modify QP to the Error State and waiting for the Affiliated Asynchronous
208  * Last WQE Reached Event. However, if the Consumer does not wait for the
209  * Affiliated Asynchronous Last WQE Reached Event, then WQE and Data Segment
210  * leakage may occur. Therefore, it is good programming practice to tear down a
211  * QP that is associated with an SRQ by using the following process:
212  *
213  * - Put the QP in the Error State
214  * - Wait for the Affiliated Asynchronous Last WQE Reached Event;
215  * - either:
216  *       drain the CQ by invoking the Poll CQ verb and either wait for CQ
217  *       to be empty or the number of Poll CQ operations has exceeded
218  *       CQ capacity size;
219  * - or
220  *       post another WR that completes on the same CQ and wait for this
221  *       WR to return as a WC;
222  * - and then invoke a Destroy QP or Reset QP.
223  *
224  * We use the second option and wait for a completion on the
225  * same CQ before destroying QPs attached to our SRQ.
226  */
227 
228 enum ipoib_cm_state {
229 	IPOIB_CM_RX_LIVE,
230 	IPOIB_CM_RX_ERROR, /* Ignored by stale task */
231 	IPOIB_CM_RX_FLUSH  /* Last WQE Reached event observed */
232 };
233 
234 struct ipoib_cm_rx {
235 	struct ib_cm_id	       *id;
236 	struct ib_qp	       *qp;
237 	struct ipoib_cm_rx_buf *rx_ring;
238 	struct list_head	list;
239 	struct net_device      *dev;
240 	unsigned long		jiffies;
241 	enum ipoib_cm_state	state;
242 	int			recv_count;
243 };
244 
245 struct ipoib_cm_tx {
246 	struct ib_cm_id	    *id;
247 	struct ib_qp	    *qp;
248 	struct list_head     list;
249 	struct net_device   *dev;
250 	struct ipoib_neigh  *neigh;
251 	struct ipoib_tx_buf *tx_ring;
252 	unsigned int	     tx_head;
253 	unsigned int	     tx_tail;
254 	unsigned long	     flags;
255 	u32		     mtu;
256 	unsigned int         max_send_sge;
257 };
258 
259 struct ipoib_cm_rx_buf {
260 	struct sk_buff *skb;
261 	u64 mapping[IPOIB_CM_RX_SG];
262 };
263 
264 struct ipoib_cm_dev_priv {
265 	struct ib_srq	       *srq;
266 	struct ipoib_cm_rx_buf *srq_ring;
267 	struct ib_cm_id	       *id;
268 	struct list_head	passive_ids;   /* state: LIVE */
269 	struct list_head	rx_error_list; /* state: ERROR */
270 	struct list_head	rx_flush_list; /* state: FLUSH, drain not started */
271 	struct list_head	rx_drain_list; /* state: FLUSH, drain started */
272 	struct list_head	rx_reap_list;  /* state: FLUSH, drain done */
273 	struct work_struct      start_task;
274 	struct work_struct      reap_task;
275 	struct work_struct      skb_task;
276 	struct work_struct      rx_reap_task;
277 	struct delayed_work     stale_task;
278 	struct sk_buff_head     skb_queue;
279 	struct list_head	start_list;
280 	struct list_head	reap_list;
281 	struct ib_wc		ibwc[IPOIB_NUM_WC];
282 	struct ib_sge		rx_sge[IPOIB_CM_RX_SG];
283 	struct ib_recv_wr       rx_wr;
284 	int			nonsrq_conn_qp;
285 	int			max_cm_mtu;
286 	int			num_frags;
287 };
288 
289 struct ipoib_ethtool_st {
290 	u16     coalesce_usecs;
291 	u16     max_coalesced_frames;
292 };
293 
294 struct ipoib_neigh_table;
295 
296 struct ipoib_neigh_hash {
297 	struct ipoib_neigh_table       *ntbl;
298 	struct ipoib_neigh __rcu      **buckets;
299 	struct rcu_head			rcu;
300 	u32				mask;
301 	u32				size;
302 };
303 
304 struct ipoib_neigh_table {
305 	struct ipoib_neigh_hash __rcu  *htbl;
306 	atomic_t			entries;
307 	struct completion		flushed;
308 	struct completion		deleted;
309 };
310 
311 struct ipoib_qp_state_validate {
312 	struct work_struct work;
313 	struct ipoib_dev_priv   *priv;
314 };
315 
316 /*
317  * Device private locking: network stack tx_lock protects members used
318  * in TX fast path, lock protects everything else.  lock nests inside
319  * of tx_lock (ie tx_lock must be acquired first if needed).
320  */
321 struct ipoib_dev_priv {
322 	spinlock_t lock;
323 
324 	struct net_device *dev;
325 	void (*next_priv_destructor)(struct net_device *dev);
326 
327 	struct napi_struct send_napi;
328 	struct napi_struct recv_napi;
329 
330 	unsigned long flags;
331 
332 	/*
333 	 * This protects access to the child_intfs list.
334 	 * To READ from child_intfs the RTNL or vlan_rwsem read side must be
335 	 * held.  To WRITE RTNL and the vlan_rwsem write side must be held (in
336 	 * that order) This lock exists because we have a few contexts where
337 	 * we need the child_intfs, but do not want to grab the RTNL.
338 	 */
339 	struct rw_semaphore vlan_rwsem;
340 	struct mutex mcast_mutex;
341 
342 	struct rb_root  path_tree;
343 	struct list_head path_list;
344 
345 	struct ipoib_neigh_table ntbl;
346 
347 	struct ipoib_mcast *broadcast;
348 	struct list_head multicast_list;
349 	struct rb_root multicast_tree;
350 
351 	struct workqueue_struct *wq;
352 	struct delayed_work mcast_task;
353 	struct work_struct carrier_on_task;
354 	struct work_struct flush_light;
355 	struct work_struct flush_normal;
356 	struct work_struct flush_heavy;
357 	struct work_struct restart_task;
358 	struct delayed_work ah_reap_task;
359 	struct delayed_work neigh_reap_task;
360 	struct ib_device *ca;
361 	u8		  port;
362 	u16		  pkey;
363 	u16		  pkey_index;
364 	struct ib_pd	 *pd;
365 	struct ib_cq	 *recv_cq;
366 	struct ib_cq	 *send_cq;
367 	struct ib_qp	 *qp;
368 	u32		  qkey;
369 
370 	union ib_gid local_gid;
371 	u32	     local_lid;
372 
373 	unsigned int admin_mtu;
374 	unsigned int mcast_mtu;
375 	unsigned int max_ib_mtu;
376 
377 	struct ipoib_rx_buf *rx_ring;
378 
379 	struct ipoib_tx_buf *tx_ring;
380 	unsigned int	     tx_head;
381 	unsigned int	     tx_tail;
382 	struct ib_sge	     tx_sge[MAX_SKB_FRAGS + 1];
383 	struct ib_ud_wr      tx_wr;
384 	struct ib_wc	     send_wc[MAX_SEND_CQE];
385 
386 	struct ib_recv_wr    rx_wr;
387 	struct ib_sge	     rx_sge[IPOIB_UD_RX_SG];
388 
389 	struct ib_wc ibwc[IPOIB_NUM_WC];
390 
391 	struct list_head dead_ahs;
392 
393 	struct ib_event_handler event_handler;
394 
395 	struct net_device *parent;
396 	struct list_head child_intfs;
397 	struct list_head list;
398 	int    child_type;
399 
400 #ifdef CONFIG_INFINIBAND_IPOIB_CM
401 	struct ipoib_cm_dev_priv cm;
402 #endif
403 
404 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
405 	struct list_head fs_list;
406 	struct dentry *mcg_dentry;
407 	struct dentry *path_dentry;
408 #endif
409 	u64	hca_caps;
410 	struct ipoib_ethtool_st ethtool;
411 	unsigned int max_send_sge;
412 	bool sm_fullmember_sendonly_support;
413 	const struct net_device_ops	*rn_ops;
414 };
415 
416 struct ipoib_ah {
417 	struct net_device *dev;
418 	struct ib_ah	  *ah;
419 	struct list_head   list;
420 	struct kref	   ref;
421 	unsigned int	   last_send;
422 	int  		   valid;
423 };
424 
425 struct ipoib_path {
426 	struct net_device    *dev;
427 	struct sa_path_rec pathrec;
428 	struct ipoib_ah      *ah;
429 	struct sk_buff_head   queue;
430 
431 	struct list_head      neigh_list;
432 
433 	int		      query_id;
434 	struct ib_sa_query   *query;
435 	struct completion     done;
436 
437 	struct rb_node	      rb_node;
438 	struct list_head      list;
439 };
440 
441 struct ipoib_neigh {
442 	struct ipoib_ah    *ah;
443 #ifdef CONFIG_INFINIBAND_IPOIB_CM
444 	struct ipoib_cm_tx *cm;
445 #endif
446 	u8     daddr[INFINIBAND_ALEN];
447 	struct sk_buff_head queue;
448 
449 	struct net_device *dev;
450 
451 	struct list_head    list;
452 	struct ipoib_neigh __rcu *hnext;
453 	struct rcu_head     rcu;
454 	atomic_t	    refcnt;
455 	unsigned long       alive;
456 };
457 
458 #define IPOIB_UD_MTU(ib_mtu)		(ib_mtu - IPOIB_ENCAP_LEN)
459 #define IPOIB_UD_BUF_SIZE(ib_mtu)	(ib_mtu + IB_GRH_BYTES)
460 
461 void ipoib_neigh_dtor(struct ipoib_neigh *neigh);
462 static inline void ipoib_neigh_put(struct ipoib_neigh *neigh)
463 {
464 	if (atomic_dec_and_test(&neigh->refcnt))
465 		ipoib_neigh_dtor(neigh);
466 }
467 struct ipoib_neigh *ipoib_neigh_get(struct net_device *dev, u8 *daddr);
468 struct ipoib_neigh *ipoib_neigh_alloc(u8 *daddr,
469 				      struct net_device *dev);
470 void ipoib_neigh_free(struct ipoib_neigh *neigh);
471 void ipoib_del_neighs_by_gid(struct net_device *dev, u8 *gid);
472 
473 extern struct workqueue_struct *ipoib_workqueue;
474 
475 /* functions */
476 
477 int ipoib_rx_poll(struct napi_struct *napi, int budget);
478 int ipoib_tx_poll(struct napi_struct *napi, int budget);
479 void ipoib_ib_rx_completion(struct ib_cq *cq, void *ctx_ptr);
480 void ipoib_ib_tx_completion(struct ib_cq *cq, void *ctx_ptr);
481 
482 struct ipoib_ah *ipoib_create_ah(struct net_device *dev,
483 				 struct ib_pd *pd, struct rdma_ah_attr *attr);
484 void ipoib_free_ah(struct kref *kref);
485 static inline void ipoib_put_ah(struct ipoib_ah *ah)
486 {
487 	kref_put(&ah->ref, ipoib_free_ah);
488 }
489 int ipoib_open(struct net_device *dev);
490 void ipoib_intf_free(struct net_device *dev);
491 int ipoib_add_pkey_attr(struct net_device *dev);
492 int ipoib_add_umcast_attr(struct net_device *dev);
493 
494 int ipoib_send(struct net_device *dev, struct sk_buff *skb,
495 	       struct ib_ah *address, u32 dqpn);
496 void ipoib_reap_ah(struct work_struct *work);
497 
498 struct ipoib_path *__path_find(struct net_device *dev, void *gid);
499 void ipoib_mark_paths_invalid(struct net_device *dev);
500 void ipoib_flush_paths(struct net_device *dev);
501 struct net_device *ipoib_intf_alloc(struct ib_device *hca, u8 port,
502 				    const char *format);
503 int ipoib_intf_init(struct ib_device *hca, u8 port, const char *format,
504 		    struct net_device *dev);
505 void ipoib_ib_tx_timer_func(struct timer_list *t);
506 void ipoib_ib_dev_flush_light(struct work_struct *work);
507 void ipoib_ib_dev_flush_normal(struct work_struct *work);
508 void ipoib_ib_dev_flush_heavy(struct work_struct *work);
509 void ipoib_pkey_event(struct work_struct *work);
510 void ipoib_ib_dev_cleanup(struct net_device *dev);
511 
512 int ipoib_ib_dev_open_default(struct net_device *dev);
513 int ipoib_ib_dev_open(struct net_device *dev);
514 int ipoib_ib_dev_stop(struct net_device *dev);
515 void ipoib_ib_dev_up(struct net_device *dev);
516 void ipoib_ib_dev_down(struct net_device *dev);
517 int ipoib_ib_dev_stop_default(struct net_device *dev);
518 void ipoib_pkey_dev_check_presence(struct net_device *dev);
519 
520 void ipoib_mcast_join_task(struct work_struct *work);
521 void ipoib_mcast_carrier_on_task(struct work_struct *work);
522 void ipoib_mcast_send(struct net_device *dev, u8 *daddr, struct sk_buff *skb);
523 
524 void ipoib_mcast_restart_task(struct work_struct *work);
525 void ipoib_mcast_start_thread(struct net_device *dev);
526 int ipoib_mcast_stop_thread(struct net_device *dev);
527 
528 void ipoib_mcast_dev_down(struct net_device *dev);
529 void ipoib_mcast_dev_flush(struct net_device *dev);
530 
531 int ipoib_dma_map_tx(struct ib_device *ca, struct ipoib_tx_buf *tx_req);
532 void ipoib_dma_unmap_tx(struct ipoib_dev_priv *priv,
533 			struct ipoib_tx_buf *tx_req);
534 
535 struct rtnl_link_ops *ipoib_get_link_ops(void);
536 
537 static inline void ipoib_build_sge(struct ipoib_dev_priv *priv,
538 				   struct ipoib_tx_buf *tx_req)
539 {
540 	int i, off;
541 	struct sk_buff *skb = tx_req->skb;
542 	skb_frag_t *frags = skb_shinfo(skb)->frags;
543 	int nr_frags = skb_shinfo(skb)->nr_frags;
544 	u64 *mapping = tx_req->mapping;
545 
546 	if (skb_headlen(skb)) {
547 		priv->tx_sge[0].addr         = mapping[0];
548 		priv->tx_sge[0].length       = skb_headlen(skb);
549 		off = 1;
550 	} else
551 		off = 0;
552 
553 	for (i = 0; i < nr_frags; ++i) {
554 		priv->tx_sge[i + off].addr = mapping[i + off];
555 		priv->tx_sge[i + off].length = skb_frag_size(&frags[i]);
556 	}
557 	priv->tx_wr.wr.num_sge	     = nr_frags + off;
558 }
559 
560 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
561 struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev);
562 int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter);
563 void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter,
564 				  union ib_gid *gid,
565 				  unsigned long *created,
566 				  unsigned int *queuelen,
567 				  unsigned int *complete,
568 				  unsigned int *send_only);
569 
570 struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev);
571 int ipoib_path_iter_next(struct ipoib_path_iter *iter);
572 void ipoib_path_iter_read(struct ipoib_path_iter *iter,
573 			  struct ipoib_path *path);
574 #endif
575 
576 int ipoib_mcast_attach(struct net_device *dev, struct ib_device *hca,
577 		       union ib_gid *mgid, u16 mlid, int set_qkey, u32 qkey);
578 int ipoib_mcast_detach(struct net_device *dev, struct ib_device *hca,
579 		       union ib_gid *mgid, u16 mlid);
580 void ipoib_mcast_remove_list(struct list_head *remove_list);
581 void ipoib_check_and_add_mcast_sendonly(struct ipoib_dev_priv *priv, u8 *mgid,
582 				struct list_head *remove_list);
583 
584 int ipoib_init_qp(struct net_device *dev);
585 int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca);
586 void ipoib_transport_dev_cleanup(struct net_device *dev);
587 
588 void ipoib_event(struct ib_event_handler *handler,
589 		 struct ib_event *record);
590 
591 int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey);
592 int ipoib_vlan_delete(struct net_device *pdev, unsigned short pkey);
593 
594 int __ipoib_vlan_add(struct ipoib_dev_priv *ppriv, struct ipoib_dev_priv *priv,
595 		     u16 pkey, int child_type);
596 
597 int  __init ipoib_netlink_init(void);
598 void __exit ipoib_netlink_fini(void);
599 
600 void ipoib_set_umcast(struct net_device *ndev, int umcast_val);
601 int  ipoib_set_mode(struct net_device *dev, const char *buf);
602 
603 void ipoib_setup_common(struct net_device *dev);
604 
605 void ipoib_pkey_open(struct ipoib_dev_priv *priv);
606 void ipoib_drain_cq(struct net_device *dev);
607 
608 void ipoib_set_ethtool_ops(struct net_device *dev);
609 
610 #define IPOIB_FLAGS_RC		0x80
611 #define IPOIB_FLAGS_UC		0x40
612 
613 /* We don't support UC connections at the moment */
614 #define IPOIB_CM_SUPPORTED(ha)   (ha[0] & (IPOIB_FLAGS_RC))
615 
616 #ifdef CONFIG_INFINIBAND_IPOIB_CM
617 
618 extern int ipoib_max_conn_qp;
619 
620 static inline int ipoib_cm_admin_enabled(struct net_device *dev)
621 {
622 	struct ipoib_dev_priv *priv = ipoib_priv(dev);
623 	return IPOIB_CM_SUPPORTED(dev->dev_addr) &&
624 		test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
625 }
626 
627 static inline int ipoib_cm_enabled(struct net_device *dev, u8 *hwaddr)
628 {
629 	struct ipoib_dev_priv *priv = ipoib_priv(dev);
630 	return IPOIB_CM_SUPPORTED(hwaddr) &&
631 		test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
632 }
633 
634 static inline int ipoib_cm_up(struct ipoib_neigh *neigh)
635 
636 {
637 	return test_bit(IPOIB_FLAG_OPER_UP, &neigh->cm->flags);
638 }
639 
640 static inline struct ipoib_cm_tx *ipoib_cm_get(struct ipoib_neigh *neigh)
641 {
642 	return neigh->cm;
643 }
644 
645 static inline void ipoib_cm_set(struct ipoib_neigh *neigh, struct ipoib_cm_tx *tx)
646 {
647 	neigh->cm = tx;
648 }
649 
650 static inline int ipoib_cm_has_srq(struct net_device *dev)
651 {
652 	struct ipoib_dev_priv *priv = ipoib_priv(dev);
653 	return !!priv->cm.srq;
654 }
655 
656 static inline unsigned int ipoib_cm_max_mtu(struct net_device *dev)
657 {
658 	struct ipoib_dev_priv *priv = ipoib_priv(dev);
659 	return priv->cm.max_cm_mtu;
660 }
661 
662 void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_tx *tx);
663 int ipoib_cm_dev_open(struct net_device *dev);
664 void ipoib_cm_dev_stop(struct net_device *dev);
665 int ipoib_cm_dev_init(struct net_device *dev);
666 int ipoib_cm_add_mode_attr(struct net_device *dev);
667 void ipoib_cm_dev_cleanup(struct net_device *dev);
668 struct ipoib_cm_tx *ipoib_cm_create_tx(struct net_device *dev, struct ipoib_path *path,
669 				    struct ipoib_neigh *neigh);
670 void ipoib_cm_destroy_tx(struct ipoib_cm_tx *tx);
671 void ipoib_cm_skb_too_long(struct net_device *dev, struct sk_buff *skb,
672 			   unsigned int mtu);
673 void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc);
674 void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc);
675 #else
676 
677 struct ipoib_cm_tx;
678 
679 #define ipoib_max_conn_qp 0
680 
681 static inline int ipoib_cm_admin_enabled(struct net_device *dev)
682 {
683 	return 0;
684 }
685 static inline int ipoib_cm_enabled(struct net_device *dev, u8 *hwaddr)
686 
687 {
688 	return 0;
689 }
690 
691 static inline int ipoib_cm_up(struct ipoib_neigh *neigh)
692 
693 {
694 	return 0;
695 }
696 
697 static inline struct ipoib_cm_tx *ipoib_cm_get(struct ipoib_neigh *neigh)
698 {
699 	return NULL;
700 }
701 
702 static inline void ipoib_cm_set(struct ipoib_neigh *neigh, struct ipoib_cm_tx *tx)
703 {
704 }
705 
706 static inline int ipoib_cm_has_srq(struct net_device *dev)
707 {
708 	return 0;
709 }
710 
711 static inline unsigned int ipoib_cm_max_mtu(struct net_device *dev)
712 {
713 	return 0;
714 }
715 
716 static inline
717 void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_tx *tx)
718 {
719 	return;
720 }
721 
722 static inline
723 int ipoib_cm_dev_open(struct net_device *dev)
724 {
725 	return 0;
726 }
727 
728 static inline
729 void ipoib_cm_dev_stop(struct net_device *dev)
730 {
731 	return;
732 }
733 
734 static inline
735 int ipoib_cm_dev_init(struct net_device *dev)
736 {
737 	return -EOPNOTSUPP;
738 }
739 
740 static inline
741 void ipoib_cm_dev_cleanup(struct net_device *dev)
742 {
743 	return;
744 }
745 
746 static inline
747 struct ipoib_cm_tx *ipoib_cm_create_tx(struct net_device *dev, struct ipoib_path *path,
748 				    struct ipoib_neigh *neigh)
749 {
750 	return NULL;
751 }
752 
753 static inline
754 void ipoib_cm_destroy_tx(struct ipoib_cm_tx *tx)
755 {
756 	return;
757 }
758 
759 static inline
760 int ipoib_cm_add_mode_attr(struct net_device *dev)
761 {
762 	return 0;
763 }
764 
765 static inline void ipoib_cm_skb_too_long(struct net_device *dev, struct sk_buff *skb,
766 					 unsigned int mtu)
767 {
768 	dev_kfree_skb_any(skb);
769 }
770 
771 static inline void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc)
772 {
773 }
774 
775 static inline void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
776 {
777 }
778 #endif
779 
780 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
781 void ipoib_create_debug_files(struct net_device *dev);
782 void ipoib_delete_debug_files(struct net_device *dev);
783 void ipoib_register_debugfs(void);
784 void ipoib_unregister_debugfs(void);
785 #else
786 static inline void ipoib_create_debug_files(struct net_device *dev) { }
787 static inline void ipoib_delete_debug_files(struct net_device *dev) { }
788 static inline void ipoib_register_debugfs(void) { }
789 static inline void ipoib_unregister_debugfs(void) { }
790 #endif
791 
792 #define ipoib_printk(level, priv, format, arg...)	\
793 	printk(level "%s: " format, ((struct ipoib_dev_priv *) priv)->dev->name , ## arg)
794 #define ipoib_warn(priv, format, arg...)		\
795 do {							\
796 	static DEFINE_RATELIMIT_STATE(_rs,		\
797 		10 * HZ /*10 seconds */,		\
798 		100);		\
799 	if (__ratelimit(&_rs))				\
800 		ipoib_printk(KERN_WARNING, priv, format , ## arg);\
801 } while (0)
802 
803 extern int ipoib_sendq_size;
804 extern int ipoib_recvq_size;
805 
806 extern struct ib_sa_client ipoib_sa_client;
807 
808 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
809 extern int ipoib_debug_level;
810 
811 #define ipoib_dbg(priv, format, arg...)			\
812 	do {						\
813 		if (ipoib_debug_level > 0)			\
814 			ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
815 	} while (0)
816 #define ipoib_dbg_mcast(priv, format, arg...)		\
817 	do {						\
818 		if (mcast_debug_level > 0)		\
819 			ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
820 	} while (0)
821 #else /* CONFIG_INFINIBAND_IPOIB_DEBUG */
822 #define ipoib_dbg(priv, format, arg...)			\
823 	do { (void) (priv); } while (0)
824 #define ipoib_dbg_mcast(priv, format, arg...)		\
825 	do { (void) (priv); } while (0)
826 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
827 
828 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA
829 #define ipoib_dbg_data(priv, format, arg...)		\
830 	do {						\
831 		if (data_debug_level > 0)		\
832 			ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
833 	} while (0)
834 #else /* CONFIG_INFINIBAND_IPOIB_DEBUG_DATA */
835 #define ipoib_dbg_data(priv, format, arg...)		\
836 	do { (void) (priv); } while (0)
837 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG_DATA */
838 
839 #define IPOIB_QPN(ha) (be32_to_cpup((__be32 *) ha) & 0xffffff)
840 
841 extern const char ipoib_driver_version[];
842 
843 #endif /* _IPOIB_H */
844