blob: 20e9f64e67a6cba164aba9ee81b9653ddc207141 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
Roland Dreier2a1d9b72005-08-10 23:03:10 -07003 * Copyright (c) 2005 Intel Corporation. All rights reserved.
4 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
5 * Copyright (c) 2005 Voltaire, Inc. All rights reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 *
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
12 *
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
16 *
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
20 *
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
25 *
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * SOFTWARE.
34 *
35 * $Id: cache.c 1349 2004-12-16 21:09:43Z roland $
36 */
37
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include <linux/module.h>
39#include <linux/errno.h>
40#include <linux/slab.h>
Tim Schmielau4e57b682005-10-30 15:03:48 -080041#include <linux/sched.h> /* INIT_WORK, schedule_work(), flush_scheduled_work() */
Linus Torvalds1da177e2005-04-16 15:20:36 -070042
Roland Dreiera4d61e82005-08-25 13:40:04 -070043#include <rdma/ib_cache.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
45#include "core_priv.h"
46
47struct ib_pkey_cache {
48 int table_len;
49 u16 table[0];
50};
51
52struct ib_gid_cache {
53 int table_len;
54 union ib_gid table[0];
55};
56
57struct ib_update_work {
58 struct work_struct work;
59 struct ib_device *device;
60 u8 port_num;
61};
62
63static inline int start_port(struct ib_device *device)
64{
Tom Tucker07ebafb2006-08-03 16:02:42 -050065 return (device->node_type == RDMA_NODE_IB_SWITCH) ? 0 : 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070066}
67
68static inline int end_port(struct ib_device *device)
69{
Tom Tucker07ebafb2006-08-03 16:02:42 -050070 return (device->node_type == RDMA_NODE_IB_SWITCH) ?
71 0 : device->phys_port_cnt;
Linus Torvalds1da177e2005-04-16 15:20:36 -070072}
73
74int ib_get_cached_gid(struct ib_device *device,
75 u8 port_num,
76 int index,
77 union ib_gid *gid)
78{
79 struct ib_gid_cache *cache;
80 unsigned long flags;
81 int ret = 0;
82
83 if (port_num < start_port(device) || port_num > end_port(device))
84 return -EINVAL;
85
86 read_lock_irqsave(&device->cache.lock, flags);
87
88 cache = device->cache.gid_cache[port_num - start_port(device)];
89
90 if (index < 0 || index >= cache->table_len)
91 ret = -EINVAL;
92 else
93 *gid = cache->table[index];
94
95 read_unlock_irqrestore(&device->cache.lock, flags);
96
97 return ret;
98}
99EXPORT_SYMBOL(ib_get_cached_gid);
100
101int ib_find_cached_gid(struct ib_device *device,
102 union ib_gid *gid,
103 u8 *port_num,
104 u16 *index)
105{
106 struct ib_gid_cache *cache;
107 unsigned long flags;
108 int p, i;
109 int ret = -ENOENT;
110
111 *port_num = -1;
112 if (index)
113 *index = -1;
114
115 read_lock_irqsave(&device->cache.lock, flags);
116
117 for (p = 0; p <= end_port(device) - start_port(device); ++p) {
118 cache = device->cache.gid_cache[p];
119 for (i = 0; i < cache->table_len; ++i) {
120 if (!memcmp(gid, &cache->table[i], sizeof *gid)) {
121 *port_num = p + start_port(device);
122 if (index)
123 *index = i;
124 ret = 0;
125 goto found;
126 }
127 }
128 }
129found:
130 read_unlock_irqrestore(&device->cache.lock, flags);
131
132 return ret;
133}
134EXPORT_SYMBOL(ib_find_cached_gid);
135
136int ib_get_cached_pkey(struct ib_device *device,
137 u8 port_num,
138 int index,
139 u16 *pkey)
140{
141 struct ib_pkey_cache *cache;
142 unsigned long flags;
143 int ret = 0;
144
145 if (port_num < start_port(device) || port_num > end_port(device))
146 return -EINVAL;
147
148 read_lock_irqsave(&device->cache.lock, flags);
149
150 cache = device->cache.pkey_cache[port_num - start_port(device)];
151
152 if (index < 0 || index >= cache->table_len)
153 ret = -EINVAL;
154 else
155 *pkey = cache->table[index];
156
157 read_unlock_irqrestore(&device->cache.lock, flags);
158
159 return ret;
160}
161EXPORT_SYMBOL(ib_get_cached_pkey);
162
163int ib_find_cached_pkey(struct ib_device *device,
164 u8 port_num,
165 u16 pkey,
166 u16 *index)
167{
168 struct ib_pkey_cache *cache;
169 unsigned long flags;
170 int i;
171 int ret = -ENOENT;
172
173 if (port_num < start_port(device) || port_num > end_port(device))
174 return -EINVAL;
175
176 read_lock_irqsave(&device->cache.lock, flags);
177
178 cache = device->cache.pkey_cache[port_num - start_port(device)];
179
180 *index = -1;
181
182 for (i = 0; i < cache->table_len; ++i)
183 if ((cache->table[i] & 0x7fff) == (pkey & 0x7fff)) {
184 *index = i;
185 ret = 0;
186 break;
187 }
188
189 read_unlock_irqrestore(&device->cache.lock, flags);
190
191 return ret;
192}
193EXPORT_SYMBOL(ib_find_cached_pkey);
194
Jack Morgenstein6fb9cdb2006-06-17 20:37:34 -0700195int ib_get_cached_lmc(struct ib_device *device,
196 u8 port_num,
197 u8 *lmc)
198{
199 unsigned long flags;
200 int ret = 0;
201
202 if (port_num < start_port(device) || port_num > end_port(device))
203 return -EINVAL;
204
205 read_lock_irqsave(&device->cache.lock, flags);
206 *lmc = device->cache.lmc_cache[port_num - start_port(device)];
207 read_unlock_irqrestore(&device->cache.lock, flags);
208
209 return ret;
210}
211EXPORT_SYMBOL(ib_get_cached_lmc);
212
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213static void ib_cache_update(struct ib_device *device,
214 u8 port)
215{
216 struct ib_port_attr *tprops = NULL;
217 struct ib_pkey_cache *pkey_cache = NULL, *old_pkey_cache;
218 struct ib_gid_cache *gid_cache = NULL, *old_gid_cache;
219 int i;
220 int ret;
221
222 tprops = kmalloc(sizeof *tprops, GFP_KERNEL);
223 if (!tprops)
224 return;
225
226 ret = ib_query_port(device, port, tprops);
227 if (ret) {
228 printk(KERN_WARNING "ib_query_port failed (%d) for %s\n",
229 ret, device->name);
230 goto err;
231 }
232
233 pkey_cache = kmalloc(sizeof *pkey_cache + tprops->pkey_tbl_len *
234 sizeof *pkey_cache->table, GFP_KERNEL);
235 if (!pkey_cache)
236 goto err;
237
238 pkey_cache->table_len = tprops->pkey_tbl_len;
239
240 gid_cache = kmalloc(sizeof *gid_cache + tprops->gid_tbl_len *
241 sizeof *gid_cache->table, GFP_KERNEL);
242 if (!gid_cache)
243 goto err;
244
245 gid_cache->table_len = tprops->gid_tbl_len;
246
247 for (i = 0; i < pkey_cache->table_len; ++i) {
248 ret = ib_query_pkey(device, port, i, pkey_cache->table + i);
249 if (ret) {
250 printk(KERN_WARNING "ib_query_pkey failed (%d) for %s (index %d)\n",
251 ret, device->name, i);
252 goto err;
253 }
254 }
255
256 for (i = 0; i < gid_cache->table_len; ++i) {
257 ret = ib_query_gid(device, port, i, gid_cache->table + i);
258 if (ret) {
259 printk(KERN_WARNING "ib_query_gid failed (%d) for %s (index %d)\n",
260 ret, device->name, i);
261 goto err;
262 }
263 }
264
265 write_lock_irq(&device->cache.lock);
266
267 old_pkey_cache = device->cache.pkey_cache[port - start_port(device)];
268 old_gid_cache = device->cache.gid_cache [port - start_port(device)];
269
270 device->cache.pkey_cache[port - start_port(device)] = pkey_cache;
271 device->cache.gid_cache [port - start_port(device)] = gid_cache;
272
Jack Morgenstein6fb9cdb2006-06-17 20:37:34 -0700273 device->cache.lmc_cache[port - start_port(device)] = tprops->lmc;
274
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 write_unlock_irq(&device->cache.lock);
276
277 kfree(old_pkey_cache);
278 kfree(old_gid_cache);
279 kfree(tprops);
280 return;
281
282err:
283 kfree(pkey_cache);
284 kfree(gid_cache);
285 kfree(tprops);
286}
287
288static void ib_cache_task(void *work_ptr)
289{
290 struct ib_update_work *work = work_ptr;
291
292 ib_cache_update(work->device, work->port_num);
293 kfree(work);
294}
295
296static void ib_cache_event(struct ib_event_handler *handler,
297 struct ib_event *event)
298{
299 struct ib_update_work *work;
300
301 if (event->event == IB_EVENT_PORT_ERR ||
302 event->event == IB_EVENT_PORT_ACTIVE ||
303 event->event == IB_EVENT_LID_CHANGE ||
304 event->event == IB_EVENT_PKEY_CHANGE ||
Jack Morgensteinacaea9e2006-08-15 17:20:50 +0300305 event->event == IB_EVENT_SM_CHANGE ||
306 event->event == IB_EVENT_CLIENT_REREGISTER) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 work = kmalloc(sizeof *work, GFP_ATOMIC);
308 if (work) {
309 INIT_WORK(&work->work, ib_cache_task, work);
310 work->device = event->device;
311 work->port_num = event->element.port_num;
312 schedule_work(&work->work);
313 }
314 }
315}
316
317static void ib_cache_setup_one(struct ib_device *device)
318{
319 int p;
320
321 rwlock_init(&device->cache.lock);
322
323 device->cache.pkey_cache =
324 kmalloc(sizeof *device->cache.pkey_cache *
325 (end_port(device) - start_port(device) + 1), GFP_KERNEL);
326 device->cache.gid_cache =
Michael S. Tsirkince684df2006-04-10 13:17:43 -0700327 kmalloc(sizeof *device->cache.gid_cache *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 (end_port(device) - start_port(device) + 1), GFP_KERNEL);
329
Jack Morgenstein6fb9cdb2006-06-17 20:37:34 -0700330 device->cache.lmc_cache = kmalloc(sizeof *device->cache.lmc_cache *
331 (end_port(device) -
332 start_port(device) + 1),
333 GFP_KERNEL);
334
335 if (!device->cache.pkey_cache || !device->cache.gid_cache ||
336 !device->cache.lmc_cache) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337 printk(KERN_WARNING "Couldn't allocate cache "
338 "for %s\n", device->name);
339 goto err;
340 }
341
342 for (p = 0; p <= end_port(device) - start_port(device); ++p) {
343 device->cache.pkey_cache[p] = NULL;
344 device->cache.gid_cache [p] = NULL;
345 ib_cache_update(device, p + start_port(device));
346 }
347
348 INIT_IB_EVENT_HANDLER(&device->cache.event_handler,
349 device, ib_cache_event);
350 if (ib_register_event_handler(&device->cache.event_handler))
351 goto err_cache;
352
353 return;
354
355err_cache:
356 for (p = 0; p <= end_port(device) - start_port(device); ++p) {
357 kfree(device->cache.pkey_cache[p]);
358 kfree(device->cache.gid_cache[p]);
359 }
360
361err:
362 kfree(device->cache.pkey_cache);
363 kfree(device->cache.gid_cache);
Jack Morgenstein6fb9cdb2006-06-17 20:37:34 -0700364 kfree(device->cache.lmc_cache);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365}
366
367static void ib_cache_cleanup_one(struct ib_device *device)
368{
369 int p;
370
371 ib_unregister_event_handler(&device->cache.event_handler);
372 flush_scheduled_work();
373
374 for (p = 0; p <= end_port(device) - start_port(device); ++p) {
375 kfree(device->cache.pkey_cache[p]);
376 kfree(device->cache.gid_cache[p]);
377 }
378
379 kfree(device->cache.pkey_cache);
380 kfree(device->cache.gid_cache);
Jack Morgenstein6fb9cdb2006-06-17 20:37:34 -0700381 kfree(device->cache.lmc_cache);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382}
383
384static struct ib_client cache_client = {
385 .name = "cache",
386 .add = ib_cache_setup_one,
387 .remove = ib_cache_cleanup_one
388};
389
390int __init ib_cache_setup(void)
391{
392 return ib_register_client(&cache_client);
393}
394
395void __exit ib_cache_cleanup(void)
396{
397 ib_unregister_client(&cache_client);
398}