IPoIB: Fix kernel unaligned access on ia64
[linux-block.git] / drivers / infiniband / ulp / ipoib / ipoib.h
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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,
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68 IPOIB_MAX_QUEUE_SIZE = 8192,
69 IPOIB_MIN_QUEUE_SIZE = 2,
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70
71 IPOIB_NUM_WC = 4,
72
73 IPOIB_MAX_PATH_REC_QUEUE = 3,
74 IPOIB_MAX_MCAST_QUEUE = 3,
75
76 IPOIB_FLAG_OPER_UP = 0,
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77 IPOIB_FLAG_INITIALIZED = 1,
78 IPOIB_FLAG_ADMIN_UP = 2,
79 IPOIB_PKEY_ASSIGNED = 3,
80 IPOIB_PKEY_STOP = 4,
81 IPOIB_FLAG_SUBINTERFACE = 5,
82 IPOIB_MCAST_RUN = 6,
83 IPOIB_STOP_REAPER = 7,
84 IPOIB_MCAST_STARTED = 8,
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85
86 IPOIB_MAX_BACKOFF_SECONDS = 16,
87
88 IPOIB_MCAST_FLAG_FOUND = 0, /* used in set_multicast_list */
89 IPOIB_MCAST_FLAG_SENDONLY = 1,
90 IPOIB_MCAST_FLAG_BUSY = 2, /* joining or already joined */
91 IPOIB_MCAST_FLAG_ATTACHED = 3,
92};
93
94/* structs */
95
96struct ipoib_header {
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97 __be16 proto;
98 u16 reserved;
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99};
100
101struct ipoib_pseudoheader {
102 u8 hwaddr[INFINIBAND_ALEN];
103};
104
105struct ipoib_mcast;
106
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107struct ipoib_rx_buf {
108 struct sk_buff *skb;
109 dma_addr_t mapping;
110};
111
112struct ipoib_tx_buf {
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113 struct sk_buff *skb;
114 DECLARE_PCI_UNMAP_ADDR(mapping)
115};
116
117/*
118 * Device private locking: tx_lock protects members used in TX fast
119 * path (and we use LLTX so upper layers don't do extra locking).
120 * lock protects everything else. lock nests inside of tx_lock (ie
121 * tx_lock must be acquired first if needed).
122 */
123struct ipoib_dev_priv {
124 spinlock_t lock;
125
126 struct net_device *dev;
127
128 unsigned long flags;
129
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130 struct mutex mcast_mutex;
131 struct mutex vlan_mutex;
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132
133 struct rb_root path_tree;
134 struct list_head path_list;
135
136 struct ipoib_mcast *broadcast;
137 struct list_head multicast_list;
138 struct rb_root multicast_tree;
139
140 struct work_struct pkey_task;
141 struct work_struct mcast_task;
142 struct work_struct flush_task;
143 struct work_struct restart_task;
144 struct work_struct ah_reap_task;
145
146 struct ib_device *ca;
147 u8 port;
148 u16 pkey;
149 struct ib_pd *pd;
150 struct ib_mr *mr;
151 struct ib_cq *cq;
152 struct ib_qp *qp;
153 u32 qkey;
154
155 union ib_gid local_gid;
156 u16 local_lid;
157 u8 local_rate;
158
159 unsigned int admin_mtu;
160 unsigned int mcast_mtu;
161
1993d683 162 struct ipoib_rx_buf *rx_ring;
1da177e4 163
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164 spinlock_t tx_lock;
165 struct ipoib_tx_buf *tx_ring;
166 unsigned tx_head;
167 unsigned tx_tail;
168 struct ib_sge tx_sge;
169 struct ib_send_wr tx_wr;
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170
171 struct ib_wc ibwc[IPOIB_NUM_WC];
172
173 struct list_head dead_ahs;
174
175 struct ib_event_handler event_handler;
176
177 struct net_device_stats stats;
178
179 struct net_device *parent;
180 struct list_head child_intfs;
181 struct list_head list;
182
183#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
184 struct list_head fs_list;
185 struct dentry *mcg_dentry;
1732b0ef 186 struct dentry *path_dentry;
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187#endif
188};
189
190struct ipoib_ah {
191 struct net_device *dev;
192 struct ib_ah *ah;
193 struct list_head list;
194 struct kref ref;
195 unsigned last_send;
196};
197
198struct ipoib_path {
199 struct net_device *dev;
200 struct ib_sa_path_rec pathrec;
201 struct ipoib_ah *ah;
202 struct sk_buff_head queue;
203
204 struct list_head neigh_list;
205
206 int query_id;
207 struct ib_sa_query *query;
208 struct completion done;
209
210 struct rb_node rb_node;
211 struct list_head list;
212};
213
214struct ipoib_neigh {
215 struct ipoib_ah *ah;
216 struct sk_buff_head queue;
217
218 struct neighbour *neighbour;
219
220 struct list_head list;
221};
222
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223/*
224 * We stash a pointer to our private neighbour information after our
225 * hardware address in neigh->ha. The ALIGN() expression here makes
226 * sure that this pointer is stored aligned so that an unaligned
227 * load is not needed to dereference it.
228 */
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229static inline struct ipoib_neigh **to_ipoib_neigh(struct neighbour *neigh)
230{
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231 return (void*) neigh + ALIGN(offsetof(struct neighbour, ha) +
232 INFINIBAND_ALEN, sizeof(void *));
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233}
234
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235struct ipoib_neigh *ipoib_neigh_alloc(struct neighbour *neigh);
236void ipoib_neigh_free(struct ipoib_neigh *neigh);
237
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238extern struct workqueue_struct *ipoib_workqueue;
239
240/* functions */
241
242void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr);
243
244struct ipoib_ah *ipoib_create_ah(struct net_device *dev,
245 struct ib_pd *pd, struct ib_ah_attr *attr);
246void ipoib_free_ah(struct kref *kref);
247static inline void ipoib_put_ah(struct ipoib_ah *ah)
248{
249 kref_put(&ah->ref, ipoib_free_ah);
250}
251
8ae5a8a2 252int ipoib_open(struct net_device *dev);
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253int ipoib_add_pkey_attr(struct net_device *dev);
254
255void ipoib_send(struct net_device *dev, struct sk_buff *skb,
256 struct ipoib_ah *address, u32 qpn);
257void ipoib_reap_ah(void *dev_ptr);
258
259void ipoib_flush_paths(struct net_device *dev);
260struct ipoib_dev_priv *ipoib_intf_alloc(const char *format);
261
262int ipoib_ib_dev_init(struct net_device *dev, struct ib_device *ca, int port);
263void ipoib_ib_dev_flush(void *dev);
264void ipoib_ib_dev_cleanup(struct net_device *dev);
265
266int ipoib_ib_dev_open(struct net_device *dev);
267int ipoib_ib_dev_up(struct net_device *dev);
0b3ea082 268int ipoib_ib_dev_down(struct net_device *dev, int flush);
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269int ipoib_ib_dev_stop(struct net_device *dev);
270
271int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port);
272void ipoib_dev_cleanup(struct net_device *dev);
273
274void ipoib_mcast_join_task(void *dev_ptr);
37c22a77 275void ipoib_mcast_send(struct net_device *dev, void *mgid, struct sk_buff *skb);
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276
277void ipoib_mcast_restart_task(void *dev_ptr);
278int ipoib_mcast_start_thread(struct net_device *dev);
8d2cae06 279int ipoib_mcast_stop_thread(struct net_device *dev, int flush);
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280
281void ipoib_mcast_dev_down(struct net_device *dev);
282void ipoib_mcast_dev_flush(struct net_device *dev);
283
8ae5a8a2 284#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
1da177e4 285struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev);
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286int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter);
287void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter,
288 union ib_gid *gid,
289 unsigned long *created,
290 unsigned int *queuelen,
291 unsigned int *complete,
292 unsigned int *send_only);
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293
294struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev);
295int ipoib_path_iter_next(struct ipoib_path_iter *iter);
296void ipoib_path_iter_read(struct ipoib_path_iter *iter,
297 struct ipoib_path *path);
8ae5a8a2 298#endif
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299
300int ipoib_mcast_attach(struct net_device *dev, u16 mlid,
301 union ib_gid *mgid);
302int ipoib_mcast_detach(struct net_device *dev, u16 mlid,
303 union ib_gid *mgid);
304
5b6810e0 305int ipoib_init_qp(struct net_device *dev);
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306int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca);
307void ipoib_transport_dev_cleanup(struct net_device *dev);
308
309void ipoib_event(struct ib_event_handler *handler,
310 struct ib_event *record);
311
312int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey);
313int ipoib_vlan_delete(struct net_device *pdev, unsigned short pkey);
314
315void ipoib_pkey_poll(void *dev);
316int ipoib_pkey_dev_delay_open(struct net_device *dev);
317
318#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
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319void ipoib_create_debug_files(struct net_device *dev);
320void ipoib_delete_debug_files(struct net_device *dev);
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321int ipoib_register_debugfs(void);
322void ipoib_unregister_debugfs(void);
323#else
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324static inline void ipoib_create_debug_files(struct net_device *dev) { }
325static inline void ipoib_delete_debug_files(struct net_device *dev) { }
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326static inline int ipoib_register_debugfs(void) { return 0; }
327static inline void ipoib_unregister_debugfs(void) { }
328#endif
329
330
331#define ipoib_printk(level, priv, format, arg...) \
332 printk(level "%s: " format, ((struct ipoib_dev_priv *) priv)->dev->name , ## arg)
333#define ipoib_warn(priv, format, arg...) \
334 ipoib_printk(KERN_WARNING, priv, format , ## arg)
335
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336extern int ipoib_sendq_size;
337extern int ipoib_recvq_size;
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338
339#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
340extern int ipoib_debug_level;
341
342#define ipoib_dbg(priv, format, arg...) \
343 do { \
344 if (ipoib_debug_level > 0) \
345 ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
346 } while (0)
347#define ipoib_dbg_mcast(priv, format, arg...) \
348 do { \
349 if (mcast_debug_level > 0) \
350 ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
351 } while (0)
352#else /* CONFIG_INFINIBAND_IPOIB_DEBUG */
353#define ipoib_dbg(priv, format, arg...) \
354 do { (void) (priv); } while (0)
355#define ipoib_dbg_mcast(priv, format, arg...) \
356 do { (void) (priv); } while (0)
357#endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
358
359#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA
360#define ipoib_dbg_data(priv, format, arg...) \
361 do { \
362 if (data_debug_level > 0) \
363 ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
364 } while (0)
365#else /* CONFIG_INFINIBAND_IPOIB_DEBUG_DATA */
366#define ipoib_dbg_data(priv, format, arg...) \
367 do { (void) (priv); } while (0)
368#endif /* CONFIG_INFINIBAND_IPOIB_DEBUG_DATA */
369
370
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371#define IPOIB_GID_FMT "%2.2x%2.2x:%2.2x%2.2x:%2.2x%2.2x:%2.2x%2.2x:" \
372 "%2.2x%2.2x:%2.2x%2.2x:%2.2x%2.2x:%2.2x%2.2x"
373
374#define IPOIB_GID_RAW_ARG(gid) ((u8 *)(gid))[0], \
375 ((u8 *)(gid))[1], \
376 ((u8 *)(gid))[2], \
377 ((u8 *)(gid))[3], \
378 ((u8 *)(gid))[4], \
379 ((u8 *)(gid))[5], \
380 ((u8 *)(gid))[6], \
381 ((u8 *)(gid))[7], \
382 ((u8 *)(gid))[8], \
383 ((u8 *)(gid))[9], \
384 ((u8 *)(gid))[10],\
385 ((u8 *)(gid))[11],\
386 ((u8 *)(gid))[12],\
387 ((u8 *)(gid))[13],\
388 ((u8 *)(gid))[14],\
389 ((u8 *)(gid))[15]
390
391#define IPOIB_GID_ARG(gid) IPOIB_GID_RAW_ARG((gid).raw)
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392
393#endif /* _IPOIB_H */