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IPoIB: Wait for join to finish before freeing mcast struct
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1/*
2 * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
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3 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
4 * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
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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 * $Id: ipoib.h 1358 2004-12-17 22:00:11Z roland $
35 */
36
37#ifndef _IPOIB_H
38#define _IPOIB_H
39
40#include <linux/list.h>
41#include <linux/skbuff.h>
42#include <linux/netdevice.h>
43#include <linux/workqueue.h>
44#include <linux/pci.h>
45#include <linux/config.h>
46#include <linux/kref.h>
47#include <linux/if_infiniband.h>
95ed644f 48#include <linux/mutex.h>
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49
50#include <net/neighbour.h>
51
52#include <asm/atomic.h>
1da177e4 53
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54#include <rdma/ib_verbs.h>
55#include <rdma/ib_pack.h>
56#include <rdma/ib_sa.h>
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57
58/* constants */
59
60enum {
61 IPOIB_PACKET_SIZE = 2048,
62 IPOIB_BUF_SIZE = IPOIB_PACKET_SIZE + IB_GRH_BYTES,
63
64 IPOIB_ENCAP_LEN = 4,
65
66 IPOIB_RX_RING_SIZE = 128,
67 IPOIB_TX_RING_SIZE = 64,
68
69 IPOIB_NUM_WC = 4,
70
71 IPOIB_MAX_PATH_REC_QUEUE = 3,
72 IPOIB_MAX_MCAST_QUEUE = 3,
73
74 IPOIB_FLAG_OPER_UP = 0,
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75 IPOIB_FLAG_INITIALIZED = 1,
76 IPOIB_FLAG_ADMIN_UP = 2,
77 IPOIB_PKEY_ASSIGNED = 3,
78 IPOIB_PKEY_STOP = 4,
79 IPOIB_FLAG_SUBINTERFACE = 5,
80 IPOIB_MCAST_RUN = 6,
81 IPOIB_STOP_REAPER = 7,
82 IPOIB_MCAST_STARTED = 8,
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83
84 IPOIB_MAX_BACKOFF_SECONDS = 16,
85
86 IPOIB_MCAST_FLAG_FOUND = 0, /* used in set_multicast_list */
87 IPOIB_MCAST_FLAG_SENDONLY = 1,
88 IPOIB_MCAST_FLAG_BUSY = 2, /* joining or already joined */
89 IPOIB_MCAST_FLAG_ATTACHED = 3,
90};
91
92/* structs */
93
94struct ipoib_header {
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95 __be16 proto;
96 u16 reserved;
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97};
98
99struct ipoib_pseudoheader {
100 u8 hwaddr[INFINIBAND_ALEN];
101};
102
103struct ipoib_mcast;
104
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105struct ipoib_rx_buf {
106 struct sk_buff *skb;
107 dma_addr_t mapping;
108};
109
110struct ipoib_tx_buf {
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111 struct sk_buff *skb;
112 DECLARE_PCI_UNMAP_ADDR(mapping)
113};
114
115/*
116 * Device private locking: tx_lock protects members used in TX fast
117 * path (and we use LLTX so upper layers don't do extra locking).
118 * lock protects everything else. lock nests inside of tx_lock (ie
119 * tx_lock must be acquired first if needed).
120 */
121struct ipoib_dev_priv {
122 spinlock_t lock;
123
124 struct net_device *dev;
125
126 unsigned long flags;
127
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128 struct mutex mcast_mutex;
129 struct mutex vlan_mutex;
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130
131 struct rb_root path_tree;
132 struct list_head path_list;
133
134 struct ipoib_mcast *broadcast;
135 struct list_head multicast_list;
136 struct rb_root multicast_tree;
137
138 struct work_struct pkey_task;
139 struct work_struct mcast_task;
140 struct work_struct flush_task;
141 struct work_struct restart_task;
142 struct work_struct ah_reap_task;
143
144 struct ib_device *ca;
145 u8 port;
146 u16 pkey;
147 struct ib_pd *pd;
148 struct ib_mr *mr;
149 struct ib_cq *cq;
150 struct ib_qp *qp;
151 u32 qkey;
152
153 union ib_gid local_gid;
154 u16 local_lid;
155 u8 local_rate;
156
157 unsigned int admin_mtu;
158 unsigned int mcast_mtu;
159
1993d683 160 struct ipoib_rx_buf *rx_ring;
1da177e4 161
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162 spinlock_t tx_lock;
163 struct ipoib_tx_buf *tx_ring;
164 unsigned tx_head;
165 unsigned tx_tail;
166 struct ib_sge tx_sge;
167 struct ib_send_wr tx_wr;
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168
169 struct ib_wc ibwc[IPOIB_NUM_WC];
170
171 struct list_head dead_ahs;
172
173 struct ib_event_handler event_handler;
174
175 struct net_device_stats stats;
176
177 struct net_device *parent;
178 struct list_head child_intfs;
179 struct list_head list;
180
181#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
182 struct list_head fs_list;
183 struct dentry *mcg_dentry;
1732b0ef 184 struct dentry *path_dentry;
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185#endif
186};
187
188struct ipoib_ah {
189 struct net_device *dev;
190 struct ib_ah *ah;
191 struct list_head list;
192 struct kref ref;
193 unsigned last_send;
194};
195
196struct ipoib_path {
197 struct net_device *dev;
198 struct ib_sa_path_rec pathrec;
199 struct ipoib_ah *ah;
200 struct sk_buff_head queue;
201
202 struct list_head neigh_list;
203
204 int query_id;
205 struct ib_sa_query *query;
206 struct completion done;
207
208 struct rb_node rb_node;
209 struct list_head list;
210};
211
212struct ipoib_neigh {
213 struct ipoib_ah *ah;
214 struct sk_buff_head queue;
215
216 struct neighbour *neighbour;
217
218 struct list_head list;
219};
220
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221/*
222 * We stash a pointer to our private neighbour information after our
223 * hardware address in neigh->ha. The ALIGN() expression here makes
224 * sure that this pointer is stored aligned so that an unaligned
225 * load is not needed to dereference it.
226 */
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227static inline struct ipoib_neigh **to_ipoib_neigh(struct neighbour *neigh)
228{
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229 return (void*) neigh + ALIGN(offsetof(struct neighbour, ha) +
230 INFINIBAND_ALEN, sizeof(void *));
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231}
232
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233struct ipoib_neigh *ipoib_neigh_alloc(struct neighbour *neigh);
234void ipoib_neigh_free(struct ipoib_neigh *neigh);
235
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236extern struct workqueue_struct *ipoib_workqueue;
237
238/* functions */
239
240void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr);
241
242struct ipoib_ah *ipoib_create_ah(struct net_device *dev,
243 struct ib_pd *pd, struct ib_ah_attr *attr);
244void ipoib_free_ah(struct kref *kref);
245static inline void ipoib_put_ah(struct ipoib_ah *ah)
246{
247 kref_put(&ah->ref, ipoib_free_ah);
248}
249
8ae5a8a2 250int ipoib_open(struct net_device *dev);
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251int ipoib_add_pkey_attr(struct net_device *dev);
252
253void ipoib_send(struct net_device *dev, struct sk_buff *skb,
254 struct ipoib_ah *address, u32 qpn);
255void ipoib_reap_ah(void *dev_ptr);
256
257void ipoib_flush_paths(struct net_device *dev);
258struct ipoib_dev_priv *ipoib_intf_alloc(const char *format);
259
260int ipoib_ib_dev_init(struct net_device *dev, struct ib_device *ca, int port);
261void ipoib_ib_dev_flush(void *dev);
262void ipoib_ib_dev_cleanup(struct net_device *dev);
263
264int ipoib_ib_dev_open(struct net_device *dev);
265int ipoib_ib_dev_up(struct net_device *dev);
0b3ea082 266int ipoib_ib_dev_down(struct net_device *dev, int flush);
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267int ipoib_ib_dev_stop(struct net_device *dev);
268
269int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port);
270void ipoib_dev_cleanup(struct net_device *dev);
271
272void ipoib_mcast_join_task(void *dev_ptr);
273void ipoib_mcast_send(struct net_device *dev, union ib_gid *mgid,
274 struct sk_buff *skb);
275
276void ipoib_mcast_restart_task(void *dev_ptr);
277int ipoib_mcast_start_thread(struct net_device *dev);
8d2cae06 278int ipoib_mcast_stop_thread(struct net_device *dev, int flush);
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279
280void ipoib_mcast_dev_down(struct net_device *dev);
281void ipoib_mcast_dev_flush(struct net_device *dev);
282
8ae5a8a2 283#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
1da177e4 284struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev);
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285int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter);
286void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter,
287 union ib_gid *gid,
288 unsigned long *created,
289 unsigned int *queuelen,
290 unsigned int *complete,
291 unsigned int *send_only);
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292
293struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev);
294int ipoib_path_iter_next(struct ipoib_path_iter *iter);
295void ipoib_path_iter_read(struct ipoib_path_iter *iter,
296 struct ipoib_path *path);
8ae5a8a2 297#endif
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298
299int ipoib_mcast_attach(struct net_device *dev, u16 mlid,
300 union ib_gid *mgid);
301int ipoib_mcast_detach(struct net_device *dev, u16 mlid,
302 union ib_gid *mgid);
303
5b6810e0 304int ipoib_init_qp(struct net_device *dev);
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305int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca);
306void ipoib_transport_dev_cleanup(struct net_device *dev);
307
308void ipoib_event(struct ib_event_handler *handler,
309 struct ib_event *record);
310
311int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey);
312int ipoib_vlan_delete(struct net_device *pdev, unsigned short pkey);
313
314void ipoib_pkey_poll(void *dev);
315int ipoib_pkey_dev_delay_open(struct net_device *dev);
316
317#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
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318void ipoib_create_debug_files(struct net_device *dev);
319void ipoib_delete_debug_files(struct net_device *dev);
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320int ipoib_register_debugfs(void);
321void ipoib_unregister_debugfs(void);
322#else
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323static inline void ipoib_create_debug_files(struct net_device *dev) { }
324static inline void ipoib_delete_debug_files(struct net_device *dev) { }
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325static inline int ipoib_register_debugfs(void) { return 0; }
326static inline void ipoib_unregister_debugfs(void) { }
327#endif
328
329
330#define ipoib_printk(level, priv, format, arg...) \
331 printk(level "%s: " format, ((struct ipoib_dev_priv *) priv)->dev->name , ## arg)
332#define ipoib_warn(priv, format, arg...) \
333 ipoib_printk(KERN_WARNING, priv, format , ## arg)
334
335
336#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
337extern int ipoib_debug_level;
338
339#define ipoib_dbg(priv, format, arg...) \
340 do { \
341 if (ipoib_debug_level > 0) \
342 ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
343 } while (0)
344#define ipoib_dbg_mcast(priv, format, arg...) \
345 do { \
346 if (mcast_debug_level > 0) \
347 ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
348 } while (0)
349#else /* CONFIG_INFINIBAND_IPOIB_DEBUG */
350#define ipoib_dbg(priv, format, arg...) \
351 do { (void) (priv); } while (0)
352#define ipoib_dbg_mcast(priv, format, arg...) \
353 do { (void) (priv); } while (0)
354#endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
355
356#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA
357#define ipoib_dbg_data(priv, format, arg...) \
358 do { \
359 if (data_debug_level > 0) \
360 ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
361 } while (0)
362#else /* CONFIG_INFINIBAND_IPOIB_DEBUG_DATA */
363#define ipoib_dbg_data(priv, format, arg...) \
364 do { (void) (priv); } while (0)
365#endif /* CONFIG_INFINIBAND_IPOIB_DEBUG_DATA */
366
367
368#define IPOIB_GID_FMT "%x:%x:%x:%x:%x:%x:%x:%x"
369
370#define IPOIB_GID_ARG(gid) be16_to_cpup((__be16 *) ((gid).raw + 0)), \
371 be16_to_cpup((__be16 *) ((gid).raw + 2)), \
372 be16_to_cpup((__be16 *) ((gid).raw + 4)), \
373 be16_to_cpup((__be16 *) ((gid).raw + 6)), \
374 be16_to_cpup((__be16 *) ((gid).raw + 8)), \
375 be16_to_cpup((__be16 *) ((gid).raw + 10)), \
376 be16_to_cpup((__be16 *) ((gid).raw + 12)), \
377 be16_to_cpup((__be16 *) ((gid).raw + 14))
378
379#endif /* _IPOIB_H */