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_STOP_NEIGH_GC	  = 11,
95 	IPOIB_NEIGH_TBL_FLUSH	  = 12,
96 	IPOIB_FLAG_DEV_ADDR_SET	  = 13,
97 	IPOIB_FLAG_DEV_ADDR_CTRL  = 14,
98 	IPOIB_FLAG_GOING_DOWN	  = 15,
99 
100 	IPOIB_MAX_BACKOFF_SECONDS = 16,
101 
102 	IPOIB_MCAST_FLAG_FOUND	  = 0,	/* used in set_multicast_list */
103 	IPOIB_MCAST_FLAG_SENDONLY = 1,
104 	/*
105 	 * For IPOIB_MCAST_FLAG_BUSY
106 	 * When set, in flight join and mcast->mc is unreliable
107 	 * When clear and mcast->mc IS_ERR_OR_NULL, need to restart or
108 	 *   haven't started yet
109 	 * When clear and mcast->mc is valid pointer, join was successful
110 	 */
111 	IPOIB_MCAST_FLAG_BUSY	  = 2,
112 	IPOIB_MCAST_FLAG_ATTACHED = 3,
113 
114 	MAX_SEND_CQE		  = 16,
115 	IPOIB_CM_COPYBREAK	  = 256,
116 
117 	IPOIB_NON_CHILD		  = 0,
118 	IPOIB_LEGACY_CHILD	  = 1,
119 	IPOIB_RTNL_CHILD	  = 2,
120 };
121 
122 #define	IPOIB_OP_RECV   (1ul << 31)
123 #ifdef CONFIG_INFINIBAND_IPOIB_CM
124 #define	IPOIB_OP_CM     (1ul << 30)
125 #else
126 #define	IPOIB_OP_CM     (0)
127 #endif
128 
129 #define IPOIB_QPN_MASK ((__force u32) cpu_to_be32(0xFFFFFF))
130 
131 /* structs */
132 
133 struct ipoib_header {
134 	__be16	proto;
135 	u16	reserved;
136 };
137 
138 struct ipoib_pseudo_header {
139 	u8	hwaddr[INFINIBAND_ALEN];
140 };
141 
142 static inline void skb_add_pseudo_hdr(struct sk_buff *skb)
143 {
144 	char *data = skb_push(skb, IPOIB_PSEUDO_LEN);
145 
146 	/*
147 	 * only the ipoib header is present now, make room for a dummy
148 	 * pseudo header and set skb field accordingly
149 	 */
150 	memset(data, 0, IPOIB_PSEUDO_LEN);
151 	skb_reset_mac_header(skb);
152 	skb_pull(skb, IPOIB_HARD_LEN);
153 }
154 
155 static inline struct ipoib_dev_priv *ipoib_priv(const struct net_device *dev)
156 {
157 	struct rdma_netdev *rn = netdev_priv(dev);
158 
159 	return rn->clnt_priv;
160 }
161 
162 /* Used for all multicast joins (broadcast, IPv4 mcast and IPv6 mcast) */
163 struct ipoib_mcast {
164 	struct ib_sa_mcmember_rec mcmember;
165 	struct ib_sa_multicast	 *mc;
166 	struct ipoib_ah		 *ah;
167 
168 	struct rb_node    rb_node;
169 	struct list_head  list;
170 
171 	unsigned long created;
172 	unsigned long backoff;
173 	unsigned long delay_until;
174 
175 	unsigned long flags;
176 	unsigned char logcount;
177 
178 	struct list_head  neigh_list;
179 
180 	struct sk_buff_head pkt_queue;
181 
182 	struct net_device *dev;
183 	struct completion done;
184 };
185 
186 struct ipoib_rx_buf {
187 	struct sk_buff *skb;
188 	u64		mapping[IPOIB_UD_RX_SG];
189 };
190 
191 struct ipoib_tx_buf {
192 	struct sk_buff *skb;
193 	u64		mapping[MAX_SKB_FRAGS + 1];
194 };
195 
196 struct ipoib_cm_tx_buf {
197 	struct sk_buff *skb;
198 	u64		mapping;
199 };
200 
201 struct ib_cm_id;
202 
203 struct ipoib_cm_data {
204 	__be32 qpn; /* High byte MUST be ignored on receive */
205 	__be32 mtu;
206 };
207 
208 /*
209  * Quoting 10.3.1 Queue Pair and EE Context States:
210  *
211  * Note, for QPs that are associated with an SRQ, the Consumer should take the
212  * QP through the Error State before invoking a Destroy QP or a Modify QP to the
213  * Reset State.  The Consumer may invoke the Destroy QP without first performing
214  * a Modify QP to the Error State and waiting for the Affiliated Asynchronous
215  * Last WQE Reached Event. However, if the Consumer does not wait for the
216  * Affiliated Asynchronous Last WQE Reached Event, then WQE and Data Segment
217  * leakage may occur. Therefore, it is good programming practice to tear down a
218  * QP that is associated with an SRQ by using the following process:
219  *
220  * - Put the QP in the Error State
221  * - Wait for the Affiliated Asynchronous Last WQE Reached Event;
222  * - either:
223  *       drain the CQ by invoking the Poll CQ verb and either wait for CQ
224  *       to be empty or the number of Poll CQ operations has exceeded
225  *       CQ capacity size;
226  * - or
227  *       post another WR that completes on the same CQ and wait for this
228  *       WR to return as a WC;
229  * - and then invoke a Destroy QP or Reset QP.
230  *
231  * We use the second option and wait for a completion on the
232  * same CQ before destroying QPs attached to our SRQ.
233  */
234 
235 enum ipoib_cm_state {
236 	IPOIB_CM_RX_LIVE,
237 	IPOIB_CM_RX_ERROR, /* Ignored by stale task */
238 	IPOIB_CM_RX_FLUSH  /* Last WQE Reached event observed */
239 };
240 
241 struct ipoib_cm_rx {
242 	struct ib_cm_id	       *id;
243 	struct ib_qp	       *qp;
244 	struct ipoib_cm_rx_buf *rx_ring;
245 	struct list_head	list;
246 	struct net_device      *dev;
247 	unsigned long		jiffies;
248 	enum ipoib_cm_state	state;
249 	int			recv_count;
250 };
251 
252 struct ipoib_cm_tx {
253 	struct ib_cm_id	    *id;
254 	struct ib_qp	    *qp;
255 	struct list_head     list;
256 	struct net_device   *dev;
257 	struct ipoib_neigh  *neigh;
258 	struct ipoib_path   *path;
259 	struct ipoib_tx_buf *tx_ring;
260 	unsigned	     tx_head;
261 	unsigned	     tx_tail;
262 	unsigned long	     flags;
263 	u32		     mtu;
264 	unsigned             max_send_sge;
265 };
266 
267 struct ipoib_cm_rx_buf {
268 	struct sk_buff *skb;
269 	u64 mapping[IPOIB_CM_RX_SG];
270 };
271 
272 struct ipoib_cm_dev_priv {
273 	struct ib_srq	       *srq;
274 	struct ipoib_cm_rx_buf *srq_ring;
275 	struct ib_cm_id	       *id;
276 	struct list_head	passive_ids;   /* state: LIVE */
277 	struct list_head	rx_error_list; /* state: ERROR */
278 	struct list_head	rx_flush_list; /* state: FLUSH, drain not started */
279 	struct list_head	rx_drain_list; /* state: FLUSH, drain started */
280 	struct list_head	rx_reap_list;  /* state: FLUSH, drain done */
281 	struct work_struct      start_task;
282 	struct work_struct      reap_task;
283 	struct work_struct      skb_task;
284 	struct work_struct      rx_reap_task;
285 	struct delayed_work     stale_task;
286 	struct sk_buff_head     skb_queue;
287 	struct list_head	start_list;
288 	struct list_head	reap_list;
289 	struct ib_wc		ibwc[IPOIB_NUM_WC];
290 	struct ib_sge		rx_sge[IPOIB_CM_RX_SG];
291 	struct ib_recv_wr       rx_wr;
292 	int			nonsrq_conn_qp;
293 	int			max_cm_mtu;
294 	int			num_frags;
295 };
296 
297 struct ipoib_ethtool_st {
298 	u16     coalesce_usecs;
299 	u16     max_coalesced_frames;
300 };
301 
302 struct ipoib_neigh_table;
303 
304 struct ipoib_neigh_hash {
305 	struct ipoib_neigh_table       *ntbl;
306 	struct ipoib_neigh __rcu      **buckets;
307 	struct rcu_head			rcu;
308 	u32				mask;
309 	u32				size;
310 };
311 
312 struct ipoib_neigh_table {
313 	struct ipoib_neigh_hash __rcu  *htbl;
314 	atomic_t			entries;
315 	struct completion		flushed;
316 	struct completion		deleted;
317 };
318 
319 struct ipoib_qp_state_validate {
320 	struct work_struct work;
321 	struct ipoib_dev_priv   *priv;
322 };
323 
324 /*
325  * Device private locking: network stack tx_lock protects members used
326  * in TX fast path, lock protects everything else.  lock nests inside
327  * of tx_lock (ie tx_lock must be acquired first if needed).
328  */
329 struct ipoib_dev_priv {
330 	spinlock_t lock;
331 
332 	struct net_device *dev;
333 
334 	struct napi_struct napi;
335 
336 	unsigned long flags;
337 
338 	struct rw_semaphore vlan_rwsem;
339 
340 	struct rb_root  path_tree;
341 	struct list_head path_list;
342 
343 	struct ipoib_neigh_table ntbl;
344 
345 	struct ipoib_mcast *broadcast;
346 	struct list_head multicast_list;
347 	struct rb_root multicast_tree;
348 
349 	struct workqueue_struct *wq;
350 	struct delayed_work mcast_task;
351 	struct work_struct carrier_on_task;
352 	struct work_struct flush_light;
353 	struct work_struct flush_normal;
354 	struct work_struct flush_heavy;
355 	struct work_struct restart_task;
356 	struct delayed_work ah_reap_task;
357 	struct delayed_work neigh_reap_task;
358 	struct ib_device *ca;
359 	u8		  port;
360 	u16		  pkey;
361 	u16		  pkey_index;
362 	struct ib_pd	 *pd;
363 	struct ib_cq	 *recv_cq;
364 	struct ib_cq	 *send_cq;
365 	struct ib_qp	 *qp;
366 	u32		  qkey;
367 
368 	union ib_gid local_gid;
369 	u16	     local_lid;
370 
371 	unsigned int admin_mtu;
372 	unsigned int mcast_mtu;
373 	unsigned int max_ib_mtu;
374 
375 	struct ipoib_rx_buf *rx_ring;
376 
377 	struct ipoib_tx_buf *tx_ring;
378 	unsigned	     tx_head;
379 	unsigned	     tx_tail;
380 	struct ib_sge	     tx_sge[MAX_SKB_FRAGS + 1];
381 	struct ib_ud_wr      tx_wr;
382 	unsigned	     tx_outstanding;
383 	struct ib_wc	     send_wc[MAX_SEND_CQE];
384 
385 	struct ib_recv_wr    rx_wr;
386 	struct ib_sge	     rx_sge[IPOIB_UD_RX_SG];
387 
388 	struct ib_wc ibwc[IPOIB_NUM_WC];
389 
390 	struct list_head dead_ahs;
391 
392 	struct ib_event_handler event_handler;
393 
394 	struct net_device *parent;
395 	struct list_head child_intfs;
396 	struct list_head list;
397 	int    child_type;
398 
399 #ifdef CONFIG_INFINIBAND_IPOIB_CM
400 	struct ipoib_cm_dev_priv cm;
401 #endif
402 
403 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
404 	struct list_head fs_list;
405 	struct dentry *mcg_dentry;
406 	struct dentry *path_dentry;
407 #endif
408 	u64	hca_caps;
409 	struct ipoib_ethtool_st ethtool;
410 	struct timer_list poll_timer;
411 	unsigned 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	   last_send;
422 };
423 
424 struct ipoib_path {
425 	struct net_device    *dev;
426 	struct sa_path_rec pathrec;
427 	struct ipoib_ah      *ah;
428 	struct sk_buff_head   queue;
429 
430 	struct list_head      neigh_list;
431 
432 	int		      query_id;
433 	struct ib_sa_query   *query;
434 	struct completion     done;
435 
436 	struct rb_node	      rb_node;
437 	struct list_head      list;
438 	int  		      valid;
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_poll(struct napi_struct *napi, int budget);
478 void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr);
479 void ipoib_send_comp_handler(struct ib_cq *cq, void *dev_ptr);
480 
481 struct ipoib_ah *ipoib_create_ah(struct net_device *dev,
482 				 struct ib_pd *pd, struct rdma_ah_attr *attr);
483 void ipoib_free_ah(struct kref *kref);
484 static inline void ipoib_put_ah(struct ipoib_ah *ah)
485 {
486 	kref_put(&ah->ref, ipoib_free_ah);
487 }
488 int ipoib_open(struct net_device *dev);
489 int ipoib_add_pkey_attr(struct net_device *dev);
490 int ipoib_add_umcast_attr(struct net_device *dev);
491 
492 int ipoib_send(struct net_device *dev, struct sk_buff *skb,
493 	       struct ib_ah *address, u32 dqpn);
494 void ipoib_reap_ah(struct work_struct *work);
495 
496 struct ipoib_path *__path_find(struct net_device *dev, void *gid);
497 void ipoib_mark_paths_invalid(struct net_device *dev);
498 void ipoib_flush_paths(struct net_device *dev);
499 struct ipoib_dev_priv *ipoib_intf_alloc(struct ib_device *hca, u8 port,
500 					const char *format);
501 void ipoib_ib_tx_timer_func(unsigned long ctx);
502 void ipoib_ib_dev_flush_light(struct work_struct *work);
503 void ipoib_ib_dev_flush_normal(struct work_struct *work);
504 void ipoib_ib_dev_flush_heavy(struct work_struct *work);
505 void ipoib_pkey_event(struct work_struct *work);
506 void ipoib_ib_dev_cleanup(struct net_device *dev);
507 
508 int ipoib_ib_dev_open_default(struct net_device *dev);
509 int ipoib_ib_dev_open(struct net_device *dev);
510 int ipoib_ib_dev_stop(struct net_device *dev);
511 void ipoib_ib_dev_up(struct net_device *dev);
512 void ipoib_ib_dev_down(struct net_device *dev);
513 int ipoib_ib_dev_stop_default(struct net_device *dev);
514 void ipoib_pkey_dev_check_presence(struct net_device *dev);
515 
516 int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port);
517 void ipoib_dev_cleanup(struct net_device *dev);
518 
519 void ipoib_mcast_join_task(struct work_struct *work);
520 void ipoib_mcast_carrier_on_task(struct work_struct *work);
521 void ipoib_mcast_send(struct net_device *dev, u8 *daddr, struct sk_buff *skb);
522 
523 void ipoib_mcast_restart_task(struct work_struct *work);
524 void ipoib_mcast_start_thread(struct net_device *dev);
525 int ipoib_mcast_stop_thread(struct net_device *dev);
526 
527 void ipoib_mcast_dev_down(struct net_device *dev);
528 void ipoib_mcast_dev_flush(struct net_device *dev);
529 
530 int ipoib_dma_map_tx(struct ib_device *ca, struct ipoib_tx_buf *tx_req);
531 void ipoib_dma_unmap_tx(struct ipoib_dev_priv *priv,
532 			struct ipoib_tx_buf *tx_req);
533 
534 static inline void ipoib_build_sge(struct ipoib_dev_priv *priv,
535 				   struct ipoib_tx_buf *tx_req)
536 {
537 	int i, off;
538 	struct sk_buff *skb = tx_req->skb;
539 	skb_frag_t *frags = skb_shinfo(skb)->frags;
540 	int nr_frags = skb_shinfo(skb)->nr_frags;
541 	u64 *mapping = tx_req->mapping;
542 
543 	if (skb_headlen(skb)) {
544 		priv->tx_sge[0].addr         = mapping[0];
545 		priv->tx_sge[0].length       = skb_headlen(skb);
546 		off = 1;
547 	} else
548 		off = 0;
549 
550 	for (i = 0; i < nr_frags; ++i) {
551 		priv->tx_sge[i + off].addr = mapping[i + off];
552 		priv->tx_sge[i + off].length = skb_frag_size(&frags[i]);
553 	}
554 	priv->tx_wr.wr.num_sge	     = nr_frags + off;
555 }
556 
557 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
558 struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev);
559 int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter);
560 void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter,
561 				  union ib_gid *gid,
562 				  unsigned long *created,
563 				  unsigned int *queuelen,
564 				  unsigned int *complete,
565 				  unsigned int *send_only);
566 
567 struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev);
568 int ipoib_path_iter_next(struct ipoib_path_iter *iter);
569 void ipoib_path_iter_read(struct ipoib_path_iter *iter,
570 			  struct ipoib_path *path);
571 #endif
572 
573 int ipoib_mcast_attach(struct net_device *dev, struct ib_device *hca,
574 		       union ib_gid *mgid, u16 mlid, int set_qkey, u32 qkey);
575 int ipoib_mcast_detach(struct net_device *dev, struct ib_device *hca,
576 		       union ib_gid *mgid, u16 mlid);
577 void ipoib_mcast_remove_list(struct list_head *remove_list);
578 void ipoib_check_and_add_mcast_sendonly(struct ipoib_dev_priv *priv, u8 *mgid,
579 				struct list_head *remove_list);
580 
581 int ipoib_init_qp(struct net_device *dev);
582 int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca);
583 void ipoib_transport_dev_cleanup(struct net_device *dev);
584 
585 void ipoib_event(struct ib_event_handler *handler,
586 		 struct ib_event *record);
587 
588 int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey);
589 int ipoib_vlan_delete(struct net_device *pdev, unsigned short pkey);
590 
591 int __ipoib_vlan_add(struct ipoib_dev_priv *ppriv, struct ipoib_dev_priv *priv,
592 		     u16 pkey, int child_type);
593 
594 int  __init ipoib_netlink_init(void);
595 void __exit ipoib_netlink_fini(void);
596 
597 void ipoib_set_umcast(struct net_device *ndev, int umcast_val);
598 int  ipoib_set_mode(struct net_device *dev, const char *buf);
599 
600 void ipoib_setup_common(struct net_device *dev);
601 
602 void ipoib_pkey_open(struct ipoib_dev_priv *priv);
603 void ipoib_drain_cq(struct net_device *dev);
604 
605 void ipoib_set_ethtool_ops(struct net_device *dev);
606 void ipoib_set_dev_features(struct ipoib_dev_priv *priv, struct ib_device *hca);
607 
608 #define IPOIB_FLAGS_RC		0x80
609 #define IPOIB_FLAGS_UC		0x40
610 
611 /* We don't support UC connections at the moment */
612 #define IPOIB_CM_SUPPORTED(ha)   (ha[0] & (IPOIB_FLAGS_RC))
613 
614 #ifdef CONFIG_INFINIBAND_IPOIB_CM
615 
616 extern int ipoib_max_conn_qp;
617 
618 static inline int ipoib_cm_admin_enabled(struct net_device *dev)
619 {
620 	struct ipoib_dev_priv *priv = ipoib_priv(dev);
621 	return IPOIB_CM_SUPPORTED(dev->dev_addr) &&
622 		test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
623 }
624 
625 static inline int ipoib_cm_enabled(struct net_device *dev, u8 *hwaddr)
626 {
627 	struct ipoib_dev_priv *priv = ipoib_priv(dev);
628 	return IPOIB_CM_SUPPORTED(hwaddr) &&
629 		test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
630 }
631 
632 static inline int ipoib_cm_up(struct ipoib_neigh *neigh)
633 
634 {
635 	return test_bit(IPOIB_FLAG_OPER_UP, &neigh->cm->flags);
636 }
637 
638 static inline struct ipoib_cm_tx *ipoib_cm_get(struct ipoib_neigh *neigh)
639 {
640 	return neigh->cm;
641 }
642 
643 static inline void ipoib_cm_set(struct ipoib_neigh *neigh, struct ipoib_cm_tx *tx)
644 {
645 	neigh->cm = tx;
646 }
647 
648 static inline int ipoib_cm_has_srq(struct net_device *dev)
649 {
650 	struct ipoib_dev_priv *priv = ipoib_priv(dev);
651 	return !!priv->cm.srq;
652 }
653 
654 static inline unsigned int ipoib_cm_max_mtu(struct net_device *dev)
655 {
656 	struct ipoib_dev_priv *priv = ipoib_priv(dev);
657 	return priv->cm.max_cm_mtu;
658 }
659 
660 void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_tx *tx);
661 int ipoib_cm_dev_open(struct net_device *dev);
662 void ipoib_cm_dev_stop(struct net_device *dev);
663 int ipoib_cm_dev_init(struct net_device *dev);
664 int ipoib_cm_add_mode_attr(struct net_device *dev);
665 void ipoib_cm_dev_cleanup(struct net_device *dev);
666 struct ipoib_cm_tx *ipoib_cm_create_tx(struct net_device *dev, struct ipoib_path *path,
667 				    struct ipoib_neigh *neigh);
668 void ipoib_cm_destroy_tx(struct ipoib_cm_tx *tx);
669 void ipoib_cm_skb_too_long(struct net_device *dev, struct sk_buff *skb,
670 			   unsigned int mtu);
671 void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc);
672 void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc);
673 #else
674 
675 struct ipoib_cm_tx;
676 
677 #define ipoib_max_conn_qp 0
678 
679 static inline int ipoib_cm_admin_enabled(struct net_device *dev)
680 {
681 	return 0;
682 }
683 static inline int ipoib_cm_enabled(struct net_device *dev, u8 *hwaddr)
684 
685 {
686 	return 0;
687 }
688 
689 static inline int ipoib_cm_up(struct ipoib_neigh *neigh)
690 
691 {
692 	return 0;
693 }
694 
695 static inline struct ipoib_cm_tx *ipoib_cm_get(struct ipoib_neigh *neigh)
696 {
697 	return NULL;
698 }
699 
700 static inline void ipoib_cm_set(struct ipoib_neigh *neigh, struct ipoib_cm_tx *tx)
701 {
702 }
703 
704 static inline int ipoib_cm_has_srq(struct net_device *dev)
705 {
706 	return 0;
707 }
708 
709 static inline unsigned int ipoib_cm_max_mtu(struct net_device *dev)
710 {
711 	return 0;
712 }
713 
714 static inline
715 void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_tx *tx)
716 {
717 	return;
718 }
719 
720 static inline
721 int ipoib_cm_dev_open(struct net_device *dev)
722 {
723 	return 0;
724 }
725 
726 static inline
727 void ipoib_cm_dev_stop(struct net_device *dev)
728 {
729 	return;
730 }
731 
732 static inline
733 int ipoib_cm_dev_init(struct net_device *dev)
734 {
735 	return -ENOSYS;
736 }
737 
738 static inline
739 void ipoib_cm_dev_cleanup(struct net_device *dev)
740 {
741 	return;
742 }
743 
744 static inline
745 struct ipoib_cm_tx *ipoib_cm_create_tx(struct net_device *dev, struct ipoib_path *path,
746 				    struct ipoib_neigh *neigh)
747 {
748 	return NULL;
749 }
750 
751 static inline
752 void ipoib_cm_destroy_tx(struct ipoib_cm_tx *tx)
753 {
754 	return;
755 }
756 
757 static inline
758 int ipoib_cm_add_mode_attr(struct net_device *dev)
759 {
760 	return 0;
761 }
762 
763 static inline void ipoib_cm_skb_too_long(struct net_device *dev, struct sk_buff *skb,
764 					 unsigned int mtu)
765 {
766 	dev_kfree_skb_any(skb);
767 }
768 
769 static inline void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc)
770 {
771 }
772 
773 static inline void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
774 {
775 }
776 #endif
777 
778 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
779 void ipoib_create_debug_files(struct net_device *dev);
780 void ipoib_delete_debug_files(struct net_device *dev);
781 int ipoib_register_debugfs(void);
782 void ipoib_unregister_debugfs(void);
783 #else
784 static inline void ipoib_create_debug_files(struct net_device *dev) { }
785 static inline void ipoib_delete_debug_files(struct net_device *dev) { }
786 static inline int ipoib_register_debugfs(void) { return 0; }
787 static inline void ipoib_unregister_debugfs(void) { }
788 #endif
789 
790 #define ipoib_printk(level, priv, format, arg...)	\
791 	printk(level "%s: " format, ((struct ipoib_dev_priv *) priv)->dev->name , ## arg)
792 #define ipoib_warn(priv, format, arg...)		\
793 do {							\
794 	static DEFINE_RATELIMIT_STATE(_rs,		\
795 		10 * HZ /*10 seconds */,		\
796 		100);		\
797 	if (__ratelimit(&_rs))				\
798 		ipoib_printk(KERN_WARNING, priv, format , ## arg);\
799 } while (0)
800 
801 extern int ipoib_sendq_size;
802 extern int ipoib_recvq_size;
803 
804 extern struct ib_sa_client ipoib_sa_client;
805 
806 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
807 extern int ipoib_debug_level;
808 
809 #define ipoib_dbg(priv, format, arg...)			\
810 	do {						\
811 		if (ipoib_debug_level > 0)			\
812 			ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
813 	} while (0)
814 #define ipoib_dbg_mcast(priv, format, arg...)		\
815 	do {						\
816 		if (mcast_debug_level > 0)		\
817 			ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
818 	} while (0)
819 #else /* CONFIG_INFINIBAND_IPOIB_DEBUG */
820 #define ipoib_dbg(priv, format, arg...)			\
821 	do { (void) (priv); } while (0)
822 #define ipoib_dbg_mcast(priv, format, arg...)		\
823 	do { (void) (priv); } while (0)
824 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
825 
826 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA
827 #define ipoib_dbg_data(priv, format, arg...)		\
828 	do {						\
829 		if (data_debug_level > 0)		\
830 			ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
831 	} while (0)
832 #else /* CONFIG_INFINIBAND_IPOIB_DEBUG_DATA */
833 #define ipoib_dbg_data(priv, format, arg...)		\
834 	do { (void) (priv); } while (0)
835 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG_DATA */
836 
837 #define IPOIB_QPN(ha) (be32_to_cpup((__be32 *) ha) & 0xffffff)
838 
839 extern const char ipoib_driver_version[];
840 
841 #endif /* _IPOIB_H */
842