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 	/* cyclic ring variables for managing tx_ring, for UD only */
381 	unsigned int	     tx_head;
382 	unsigned int	     tx_tail;
383 	/* cyclic ring variables for counting overall outstanding send WRs */
384 	unsigned int	     global_tx_head;
385 	unsigned int	     global_tx_tail;
386 	struct ib_sge	     tx_sge[MAX_SKB_FRAGS + 1];
387 	struct ib_ud_wr      tx_wr;
388 	struct ib_wc	     send_wc[MAX_SEND_CQE];
389 
390 	struct ib_recv_wr    rx_wr;
391 	struct ib_sge	     rx_sge[IPOIB_UD_RX_SG];
392 
393 	struct ib_wc ibwc[IPOIB_NUM_WC];
394 
395 	struct list_head dead_ahs;
396 
397 	struct ib_event_handler event_handler;
398 
399 	struct net_device *parent;
400 	struct list_head child_intfs;
401 	struct list_head list;
402 	int    child_type;
403 
404 #ifdef CONFIG_INFINIBAND_IPOIB_CM
405 	struct ipoib_cm_dev_priv cm;
406 #endif
407 
408 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
409 	struct list_head fs_list;
410 	struct dentry *mcg_dentry;
411 	struct dentry *path_dentry;
412 #endif
413 	u64	hca_caps;
414 	u64	kernel_caps;
415 	struct ipoib_ethtool_st ethtool;
416 	unsigned int max_send_sge;
417 	const struct net_device_ops	*rn_ops;
418 };
419 
420 struct ipoib_ah {
421 	struct net_device *dev;
422 	struct ib_ah	  *ah;
423 	struct list_head   list;
424 	struct kref	   ref;
425 	unsigned int	   last_send;
426 	int  		   valid;
427 };
428 
429 struct ipoib_path {
430 	struct net_device    *dev;
431 	struct sa_path_rec pathrec;
432 	struct ipoib_ah      *ah;
433 	struct sk_buff_head   queue;
434 
435 	struct list_head      neigh_list;
436 
437 	int		      query_id;
438 	struct ib_sa_query   *query;
439 	struct completion     done;
440 
441 	struct rb_node	      rb_node;
442 	struct list_head      list;
443 };
444 
445 struct ipoib_neigh {
446 	struct ipoib_ah    *ah;
447 #ifdef CONFIG_INFINIBAND_IPOIB_CM
448 	struct ipoib_cm_tx *cm;
449 #endif
450 	u8     daddr[INFINIBAND_ALEN];
451 	struct sk_buff_head queue;
452 
453 	struct net_device *dev;
454 
455 	struct list_head    list;
456 	struct ipoib_neigh __rcu *hnext;
457 	struct rcu_head     rcu;
458 	refcount_t	    refcnt;
459 	unsigned long       alive;
460 };
461 
462 #define IPOIB_UD_MTU(ib_mtu)		(ib_mtu - IPOIB_ENCAP_LEN)
463 #define IPOIB_UD_BUF_SIZE(ib_mtu)	(ib_mtu + IB_GRH_BYTES)
464 
465 void ipoib_neigh_dtor(struct ipoib_neigh *neigh);
466 static inline void ipoib_neigh_put(struct ipoib_neigh *neigh)
467 {
468 	if (refcount_dec_and_test(&neigh->refcnt))
469 		ipoib_neigh_dtor(neigh);
470 }
471 struct ipoib_neigh *ipoib_neigh_get(struct net_device *dev, u8 *daddr);
472 struct ipoib_neigh *ipoib_neigh_alloc(u8 *daddr,
473 				      struct net_device *dev);
474 void ipoib_neigh_free(struct ipoib_neigh *neigh);
475 void ipoib_del_neighs_by_gid(struct net_device *dev, u8 *gid);
476 
477 extern struct workqueue_struct *ipoib_workqueue;
478 
479 /* functions */
480 
481 int ipoib_rx_poll(struct napi_struct *napi, int budget);
482 int ipoib_tx_poll(struct napi_struct *napi, int budget);
483 void ipoib_ib_rx_completion(struct ib_cq *cq, void *ctx_ptr);
484 void ipoib_ib_tx_completion(struct ib_cq *cq, void *ctx_ptr);
485 
486 struct ipoib_ah *ipoib_create_ah(struct net_device *dev,
487 				 struct ib_pd *pd, struct rdma_ah_attr *attr);
488 void ipoib_free_ah(struct kref *kref);
489 static inline void ipoib_put_ah(struct ipoib_ah *ah)
490 {
491 	kref_put(&ah->ref, ipoib_free_ah);
492 }
493 int ipoib_open(struct net_device *dev);
494 void ipoib_intf_free(struct net_device *dev);
495 int ipoib_add_pkey_attr(struct net_device *dev);
496 int ipoib_add_umcast_attr(struct net_device *dev);
497 
498 int ipoib_send(struct net_device *dev, struct sk_buff *skb,
499 	       struct ib_ah *address, u32 dqpn);
500 void ipoib_reap_ah(struct work_struct *work);
501 
502 struct ipoib_path *__path_find(struct net_device *dev, void *gid);
503 void ipoib_mark_paths_invalid(struct net_device *dev);
504 void ipoib_flush_paths(struct net_device *dev);
505 struct net_device *ipoib_intf_alloc(struct ib_device *hca, u32 port,
506 				    const char *format);
507 int ipoib_intf_init(struct ib_device *hca, u32 port, const char *format,
508 		    struct net_device *dev);
509 void ipoib_ib_tx_timer_func(struct timer_list *t);
510 void ipoib_ib_dev_flush_light(struct work_struct *work);
511 void ipoib_ib_dev_flush_normal(struct work_struct *work);
512 void ipoib_ib_dev_flush_heavy(struct work_struct *work);
513 void ipoib_pkey_event(struct work_struct *work);
514 void ipoib_ib_dev_cleanup(struct net_device *dev);
515 
516 int ipoib_ib_dev_open_default(struct net_device *dev);
517 int ipoib_ib_dev_open(struct net_device *dev);
518 void ipoib_ib_dev_stop(struct net_device *dev);
519 void ipoib_ib_dev_up(struct net_device *dev);
520 void ipoib_ib_dev_down(struct net_device *dev);
521 int ipoib_ib_dev_stop_default(struct net_device *dev);
522 void ipoib_pkey_dev_check_presence(struct net_device *dev);
523 
524 void ipoib_mcast_join_task(struct work_struct *work);
525 void ipoib_mcast_carrier_on_task(struct work_struct *work);
526 void ipoib_mcast_send(struct net_device *dev, u8 *daddr, struct sk_buff *skb);
527 
528 void ipoib_mcast_restart_task(struct work_struct *work);
529 void ipoib_mcast_start_thread(struct net_device *dev);
530 void ipoib_mcast_stop_thread(struct net_device *dev);
531 
532 void ipoib_mcast_dev_down(struct net_device *dev);
533 void ipoib_mcast_dev_flush(struct net_device *dev);
534 
535 int ipoib_dma_map_tx(struct ib_device *ca, struct ipoib_tx_buf *tx_req);
536 void ipoib_dma_unmap_tx(struct ipoib_dev_priv *priv,
537 			struct ipoib_tx_buf *tx_req);
538 
539 struct rtnl_link_ops *ipoib_get_link_ops(void);
540 
541 static inline void ipoib_build_sge(struct ipoib_dev_priv *priv,
542 				   struct ipoib_tx_buf *tx_req)
543 {
544 	int i, off;
545 	struct sk_buff *skb = tx_req->skb;
546 	skb_frag_t *frags = skb_shinfo(skb)->frags;
547 	int nr_frags = skb_shinfo(skb)->nr_frags;
548 	u64 *mapping = tx_req->mapping;
549 
550 	if (skb_headlen(skb)) {
551 		priv->tx_sge[0].addr         = mapping[0];
552 		priv->tx_sge[0].length       = skb_headlen(skb);
553 		off = 1;
554 	} else
555 		off = 0;
556 
557 	for (i = 0; i < nr_frags; ++i) {
558 		priv->tx_sge[i + off].addr = mapping[i + off];
559 		priv->tx_sge[i + off].length = skb_frag_size(&frags[i]);
560 	}
561 	priv->tx_wr.wr.num_sge	     = nr_frags + off;
562 }
563 
564 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
565 struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev);
566 int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter);
567 void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter,
568 				  union ib_gid *gid,
569 				  unsigned long *created,
570 				  unsigned int *queuelen,
571 				  unsigned int *complete,
572 				  unsigned int *send_only);
573 
574 struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev);
575 int ipoib_path_iter_next(struct ipoib_path_iter *iter);
576 void ipoib_path_iter_read(struct ipoib_path_iter *iter,
577 			  struct ipoib_path *path);
578 #endif
579 
580 int ipoib_mcast_attach(struct net_device *dev, struct ib_device *hca,
581 		       union ib_gid *mgid, u16 mlid, int set_qkey, u32 qkey);
582 int ipoib_mcast_detach(struct net_device *dev, struct ib_device *hca,
583 		       union ib_gid *mgid, u16 mlid);
584 void ipoib_mcast_remove_list(struct list_head *remove_list);
585 void ipoib_check_and_add_mcast_sendonly(struct ipoib_dev_priv *priv, u8 *mgid,
586 				struct list_head *remove_list);
587 
588 int ipoib_init_qp(struct net_device *dev);
589 int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca);
590 void ipoib_transport_dev_cleanup(struct net_device *dev);
591 
592 void ipoib_event(struct ib_event_handler *handler,
593 		 struct ib_event *record);
594 
595 int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey);
596 int ipoib_vlan_delete(struct net_device *pdev, unsigned short pkey);
597 
598 int __ipoib_vlan_add(struct ipoib_dev_priv *ppriv, struct ipoib_dev_priv *priv,
599 		     u16 pkey, int child_type);
600 
601 int  __init ipoib_netlink_init(void);
602 void __exit ipoib_netlink_fini(void);
603 
604 void ipoib_set_umcast(struct net_device *ndev, int umcast_val);
605 int  ipoib_set_mode(struct net_device *dev, const char *buf);
606 
607 void ipoib_setup_common(struct net_device *dev);
608 
609 void ipoib_pkey_open(struct ipoib_dev_priv *priv);
610 void ipoib_drain_cq(struct net_device *dev);
611 
612 void ipoib_set_ethtool_ops(struct net_device *dev);
613 
614 #define IPOIB_FLAGS_RC		0x80
615 #define IPOIB_FLAGS_UC		0x40
616 
617 /* We don't support UC connections at the moment */
618 #define IPOIB_CM_SUPPORTED(ha)   (ha[0] & (IPOIB_FLAGS_RC))
619 
620 #ifdef CONFIG_INFINIBAND_IPOIB_CM
621 
622 extern int ipoib_max_conn_qp;
623 
624 static inline int ipoib_cm_admin_enabled(struct net_device *dev)
625 {
626 	struct ipoib_dev_priv *priv = ipoib_priv(dev);
627 	return IPOIB_CM_SUPPORTED(dev->dev_addr) &&
628 		test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
629 }
630 
631 static inline int ipoib_cm_enabled(struct net_device *dev, u8 *hwaddr)
632 {
633 	struct ipoib_dev_priv *priv = ipoib_priv(dev);
634 	return IPOIB_CM_SUPPORTED(hwaddr) &&
635 		test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
636 }
637 
638 static inline int ipoib_cm_up(struct ipoib_neigh *neigh)
639 
640 {
641 	return test_bit(IPOIB_FLAG_OPER_UP, &neigh->cm->flags);
642 }
643 
644 static inline struct ipoib_cm_tx *ipoib_cm_get(struct ipoib_neigh *neigh)
645 {
646 	return neigh->cm;
647 }
648 
649 static inline void ipoib_cm_set(struct ipoib_neigh *neigh, struct ipoib_cm_tx *tx)
650 {
651 	neigh->cm = tx;
652 }
653 
654 static inline int ipoib_cm_has_srq(struct net_device *dev)
655 {
656 	struct ipoib_dev_priv *priv = ipoib_priv(dev);
657 	return !!priv->cm.srq;
658 }
659 
660 static inline unsigned int ipoib_cm_max_mtu(struct net_device *dev)
661 {
662 	struct ipoib_dev_priv *priv = ipoib_priv(dev);
663 	return priv->cm.max_cm_mtu;
664 }
665 
666 void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_tx *tx);
667 int ipoib_cm_dev_open(struct net_device *dev);
668 void ipoib_cm_dev_stop(struct net_device *dev);
669 int ipoib_cm_dev_init(struct net_device *dev);
670 int ipoib_cm_add_mode_attr(struct net_device *dev);
671 void ipoib_cm_dev_cleanup(struct net_device *dev);
672 struct ipoib_cm_tx *ipoib_cm_create_tx(struct net_device *dev, struct ipoib_path *path,
673 				    struct ipoib_neigh *neigh);
674 void ipoib_cm_destroy_tx(struct ipoib_cm_tx *tx);
675 void ipoib_cm_skb_too_long(struct net_device *dev, struct sk_buff *skb,
676 			   unsigned int mtu);
677 void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc);
678 void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc);
679 #else
680 
681 #define ipoib_max_conn_qp 0
682 
683 static inline int ipoib_cm_admin_enabled(struct net_device *dev)
684 {
685 	return 0;
686 }
687 static inline int ipoib_cm_enabled(struct net_device *dev, u8 *hwaddr)
688 
689 {
690 	return 0;
691 }
692 
693 static inline int ipoib_cm_up(struct ipoib_neigh *neigh)
694 
695 {
696 	return 0;
697 }
698 
699 static inline struct ipoib_cm_tx *ipoib_cm_get(struct ipoib_neigh *neigh)
700 {
701 	return NULL;
702 }
703 
704 static inline void ipoib_cm_set(struct ipoib_neigh *neigh, struct ipoib_cm_tx *tx)
705 {
706 }
707 
708 static inline int ipoib_cm_has_srq(struct net_device *dev)
709 {
710 	return 0;
711 }
712 
713 static inline unsigned int ipoib_cm_max_mtu(struct net_device *dev)
714 {
715 	return 0;
716 }
717 
718 static inline
719 void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_tx *tx)
720 {
721 	return;
722 }
723 
724 static inline
725 int ipoib_cm_dev_open(struct net_device *dev)
726 {
727 	return 0;
728 }
729 
730 static inline
731 void ipoib_cm_dev_stop(struct net_device *dev)
732 {
733 	return;
734 }
735 
736 static inline
737 int ipoib_cm_dev_init(struct net_device *dev)
738 {
739 	return -EOPNOTSUPP;
740 }
741 
742 static inline
743 void ipoib_cm_dev_cleanup(struct net_device *dev)
744 {
745 	return;
746 }
747 
748 static inline
749 struct ipoib_cm_tx *ipoib_cm_create_tx(struct net_device *dev, struct ipoib_path *path,
750 				    struct ipoib_neigh *neigh)
751 {
752 	return NULL;
753 }
754 
755 static inline
756 void ipoib_cm_destroy_tx(struct ipoib_cm_tx *tx)
757 {
758 	return;
759 }
760 
761 static inline
762 int ipoib_cm_add_mode_attr(struct net_device *dev)
763 {
764 	return 0;
765 }
766 
767 static inline void ipoib_cm_skb_too_long(struct net_device *dev, struct sk_buff *skb,
768 					 unsigned int mtu)
769 {
770 	dev_kfree_skb_any(skb);
771 }
772 
773 static inline void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc)
774 {
775 }
776 
777 static inline void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
778 {
779 }
780 #endif
781 
782 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
783 void ipoib_create_debug_files(struct net_device *dev);
784 void ipoib_delete_debug_files(struct net_device *dev);
785 void ipoib_register_debugfs(void);
786 void ipoib_unregister_debugfs(void);
787 #else
788 static inline void ipoib_create_debug_files(struct net_device *dev) { }
789 static inline void ipoib_delete_debug_files(struct net_device *dev) { }
790 static inline void ipoib_register_debugfs(void) { }
791 static inline void ipoib_unregister_debugfs(void) { }
792 #endif
793 
794 #define ipoib_printk(level, priv, format, arg...)	\
795 	printk(level "%s: " format, ((struct ipoib_dev_priv *) priv)->dev->name , ## arg)
796 #define ipoib_warn(priv, format, arg...)		\
797 do {							\
798 	static DEFINE_RATELIMIT_STATE(_rs,		\
799 		10 * HZ /*10 seconds */,		\
800 		100);		\
801 	if (__ratelimit(&_rs))				\
802 		ipoib_printk(KERN_WARNING, priv, format , ## arg);\
803 } while (0)
804 
805 extern int ipoib_sendq_size;
806 extern int ipoib_recvq_size;
807 
808 extern struct ib_sa_client ipoib_sa_client;
809 
810 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
811 extern int ipoib_debug_level;
812 
813 #define ipoib_dbg(priv, format, arg...)			\
814 	do {						\
815 		if (ipoib_debug_level > 0)			\
816 			ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
817 	} while (0)
818 #define ipoib_dbg_mcast(priv, format, arg...)		\
819 	do {						\
820 		if (mcast_debug_level > 0)		\
821 			ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
822 	} while (0)
823 #else /* CONFIG_INFINIBAND_IPOIB_DEBUG */
824 #define ipoib_dbg(priv, format, arg...)			\
825 	do { (void) (priv); } while (0)
826 #define ipoib_dbg_mcast(priv, format, arg...)		\
827 	do { (void) (priv); } while (0)
828 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
829 
830 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA
831 #define ipoib_dbg_data(priv, format, arg...)		\
832 	do {						\
833 		if (data_debug_level > 0)		\
834 			ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
835 	} while (0)
836 #else /* CONFIG_INFINIBAND_IPOIB_DEBUG_DATA */
837 #define ipoib_dbg_data(priv, format, arg...)		\
838 	do { (void) (priv); } while (0)
839 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG_DATA */
840 
841 #define IPOIB_QPN(ha) (be32_to_cpup((__be32 *) ha) & 0xffffff)
842 
843 #endif /* _IPOIB_H */
844