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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / drivers / infiniband / hw / mlx4 / alias_GUID.c
blob155b4dfc0ae837392d0db8d2d07a9b551634d777
1 /*
2 * Copyright (c) 2012 Mellanox Technologies. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32 /***********************************************************/
33 /*This file support the handling of the Alias GUID feature. */
34 /***********************************************************/
35 #include <rdma/ib_mad.h>
36 #include <rdma/ib_smi.h>
37 #include <rdma/ib_cache.h>
38 #include <rdma/ib_sa.h>
39 #include <rdma/ib_pack.h>
40 #include <linux/mlx4/cmd.h>
41 #include <linux/module.h>
42 #include <linux/init.h>
43 #include <linux/errno.h>
44 #include <rdma/ib_user_verbs.h>
45 #include <linux/delay.h>
46 #include "mlx4_ib.h"
47
48 /*
49 The driver keeps the current state of all guids, as they are in the HW.
50 Whenever we receive an smp mad GUIDInfo record, the data will be cached.
51 */
52
53 struct mlx4_alias_guid_work_context {
54 u8 port;
55 struct mlx4_ib_dev *dev ;
56 struct ib_sa_query *sa_query;
57 struct completion done;
58 int query_id;
59 struct list_head list;
60 int block_num;
61 ib_sa_comp_mask guid_indexes;
62 u8 method;
63 };
64
65 struct mlx4_next_alias_guid_work {
66 u8 port;
67 u8 block_num;
68 u8 method;
69 struct mlx4_sriov_alias_guid_info_rec_det rec_det;
70 };
71
72 static int get_low_record_time_index(struct mlx4_ib_dev *dev, u8 port,
73 int *resched_delay_sec);
74
75 void mlx4_ib_update_cache_on_guid_change(struct mlx4_ib_dev *dev, int block_num,
76 u8 port_num, u8 *p_data)
77 {
78 int i;
79 u64 guid_indexes;
80 int slave_id;
81 int port_index = port_num - 1;
82
83 if (!mlx4_is_master(dev->dev))
84 return;
85
86 guid_indexes = be64_to_cpu((__force __be64) dev->sriov.alias_guid.
87 ports_guid[port_num - 1].
88 all_rec_per_port[block_num].guid_indexes);
89 pr_debug("port: %d, guid_indexes: 0x%llx\n", port_num, guid_indexes);
90
91 for (i = 0; i < NUM_ALIAS_GUID_IN_REC; i++) {
92 /* The location of the specific index starts from bit number 4
93 * until bit num 11 */
94 if (test_bit(i + 4, (unsigned long *)&guid_indexes)) {
95 slave_id = (block_num * NUM_ALIAS_GUID_IN_REC) + i ;
96 if (slave_id >= dev->dev->num_slaves) {
97 pr_debug("The last slave: %d\n", slave_id);
98 return;
99 }
100
101 /* cache the guid: */
102 memcpy(&dev->sriov.demux[port_index].guid_cache[slave_id],
103 &p_data[i * GUID_REC_SIZE],
104 GUID_REC_SIZE);
105 } else
106 pr_debug("Guid number: %d in block: %d"
107 " was not updated\n", i, block_num);
108 }
109 }
110
111 static __be64 get_cached_alias_guid(struct mlx4_ib_dev *dev, int port, int index)
112 {
113 if (index >= NUM_ALIAS_GUID_PER_PORT) {
114 pr_err("%s: ERROR: asked for index:%d\n", __func__, index);
115 return (__force __be64) -1;
116 }
117 return *(__be64 *)&dev->sriov.demux[port - 1].guid_cache[index];
118 }
119
120
121 ib_sa_comp_mask mlx4_ib_get_aguid_comp_mask_from_ix(int index)
122 {
123 return IB_SA_COMP_MASK(4 + index);
124 }
125
126 void mlx4_ib_slave_alias_guid_event(struct mlx4_ib_dev *dev, int slave,
127 int port, int slave_init)
128 {
129 __be64 curr_guid, required_guid;
130 int record_num = slave / 8;
131 int index = slave % 8;
132 int port_index = port - 1;
133 unsigned long flags;
134 int do_work = 0;
135
136 spin_lock_irqsave(&dev->sriov.alias_guid.ag_work_lock, flags);
137 if (dev->sriov.alias_guid.ports_guid[port_index].state_flags &
138 GUID_STATE_NEED_PORT_INIT)
139 goto unlock;
140 if (!slave_init) {
141 curr_guid = *(__be64 *)&dev->sriov.
142 alias_guid.ports_guid[port_index].
143 all_rec_per_port[record_num].
144 all_recs[GUID_REC_SIZE * index];
145 if (curr_guid == cpu_to_be64(MLX4_GUID_FOR_DELETE_VAL) ||
146 !curr_guid)
147 goto unlock;
148 required_guid = cpu_to_be64(MLX4_GUID_FOR_DELETE_VAL);
149 } else {
150 required_guid = mlx4_get_admin_guid(dev->dev, slave, port);
151 if (required_guid == cpu_to_be64(MLX4_GUID_FOR_DELETE_VAL))
152 goto unlock;
153 }
154 *(__be64 *)&dev->sriov.alias_guid.ports_guid[port_index].
155 all_rec_per_port[record_num].
156 all_recs[GUID_REC_SIZE * index] = required_guid;
157 dev->sriov.alias_guid.ports_guid[port_index].
158 all_rec_per_port[record_num].guid_indexes
159 |= mlx4_ib_get_aguid_comp_mask_from_ix(index);
160 dev->sriov.alias_guid.ports_guid[port_index].
161 all_rec_per_port[record_num].status
162 = MLX4_GUID_INFO_STATUS_IDLE;
163 /* set to run immediately */
164 dev->sriov.alias_guid.ports_guid[port_index].
165 all_rec_per_port[record_num].time_to_run = 0;
166 dev->sriov.alias_guid.ports_guid[port_index].
167 all_rec_per_port[record_num].
168 guids_retry_schedule[index] = 0;
169 do_work = 1;
170 unlock:
171 spin_unlock_irqrestore(&dev->sriov.alias_guid.ag_work_lock, flags);
172
173 if (do_work)
174 mlx4_ib_init_alias_guid_work(dev, port_index);
175 }
176
177 /*
178 * Whenever new GUID is set/unset (guid table change) create event and
179 * notify the relevant slave (master also should be notified).
180 * If the GUID value is not as we have in the cache the slave will not be
181 * updated; in this case it waits for the smp_snoop or the port management
182 * event to call the function and to update the slave.
183 * block_number - the index of the block (16 blocks available)
184 * port_number - 1 or 2
185 */
186 void mlx4_ib_notify_slaves_on_guid_change(struct mlx4_ib_dev *dev,
187 int block_num, u8 port_num,
188 u8 *p_data)
189 {
190 int i;
191 u64 guid_indexes;
192 int slave_id, slave_port;
193 enum slave_port_state new_state;
194 enum slave_port_state prev_state;
195 __be64 tmp_cur_ag, form_cache_ag;
196 enum slave_port_gen_event gen_event;
197 struct mlx4_sriov_alias_guid_info_rec_det *rec;
198 unsigned long flags;
199 __be64 required_value;
200
201 if (!mlx4_is_master(dev->dev))
202 return;
203
204 rec = &dev->sriov.alias_guid.ports_guid[port_num - 1].
205 all_rec_per_port[block_num];
206 guid_indexes = be64_to_cpu((__force __be64) dev->sriov.alias_guid.
207 ports_guid[port_num - 1].
208 all_rec_per_port[block_num].guid_indexes);
209 pr_debug("port: %d, guid_indexes: 0x%llx\n", port_num, guid_indexes);
210
211 /*calculate the slaves and notify them*/
212 for (i = 0; i < NUM_ALIAS_GUID_IN_REC; i++) {
213 /* the location of the specific index runs from bits 4..11 */
214 if (!(test_bit(i + 4, (unsigned long *)&guid_indexes)))
215 continue;
216
217 slave_id = (block_num * NUM_ALIAS_GUID_IN_REC) + i ;
218 if (slave_id >= dev->dev->persist->num_vfs + 1)
219 return;
220
221 slave_port = mlx4_phys_to_slave_port(dev->dev, slave_id, port_num);
222 if (slave_port < 0) /* this port isn't available for the VF */
223 continue;
224
225 tmp_cur_ag = *(__be64 *)&p_data[i * GUID_REC_SIZE];
226 form_cache_ag = get_cached_alias_guid(dev, port_num,
227 (NUM_ALIAS_GUID_IN_REC * block_num) + i);
228 /*
229 * Check if guid is not the same as in the cache,
230 * If it is different, wait for the snoop_smp or the port mgmt
231 * change event to update the slave on its port state change
232 */
233 if (tmp_cur_ag != form_cache_ag)
234 continue;
235
236 spin_lock_irqsave(&dev->sriov.alias_guid.ag_work_lock, flags);
237 required_value = *(__be64 *)&rec->all_recs[i * GUID_REC_SIZE];
238
239 if (required_value == cpu_to_be64(MLX4_GUID_FOR_DELETE_VAL))
240 required_value = 0;
241
242 if (tmp_cur_ag == required_value) {
243 rec->guid_indexes = rec->guid_indexes &
244 ~mlx4_ib_get_aguid_comp_mask_from_ix(i);
245 } else {
246 /* may notify port down if value is 0 */
247 if (tmp_cur_ag != MLX4_NOT_SET_GUID) {
248 spin_unlock_irqrestore(&dev->sriov.
249 alias_guid.ag_work_lock, flags);
250 continue;
251 }
252 }
253 spin_unlock_irqrestore(&dev->sriov.alias_guid.ag_work_lock,
254 flags);
255 mlx4_gen_guid_change_eqe(dev->dev, slave_id, port_num);
256 /*2 cases: Valid GUID, and Invalid Guid*/
257
258 if (tmp_cur_ag != MLX4_NOT_SET_GUID) { /*valid GUID*/
259 prev_state = mlx4_get_slave_port_state(dev->dev, slave_id, port_num);
260 new_state = set_and_calc_slave_port_state(dev->dev, slave_id, port_num,
261 MLX4_PORT_STATE_IB_PORT_STATE_EVENT_GID_VALID,
262 &gen_event);
263 pr_debug("slave: %d, port: %d prev_port_state: %d,"
264 " new_port_state: %d, gen_event: %d\n",
265 slave_id, port_num, prev_state, new_state, gen_event);
266 if (gen_event == SLAVE_PORT_GEN_EVENT_UP) {
267 pr_debug("sending PORT_UP event to slave: %d, port: %d\n",
268 slave_id, port_num);
269 mlx4_gen_port_state_change_eqe(dev->dev, slave_id,
270 port_num, MLX4_PORT_CHANGE_SUBTYPE_ACTIVE);
271 }
272 } else { /* request to invalidate GUID */
273 set_and_calc_slave_port_state(dev->dev, slave_id, port_num,
274 MLX4_PORT_STATE_IB_EVENT_GID_INVALID,
275 &gen_event);
276 if (gen_event == SLAVE_PORT_GEN_EVENT_DOWN) {
277 pr_debug("sending PORT DOWN event to slave: %d, port: %d\n",
278 slave_id, port_num);
279 mlx4_gen_port_state_change_eqe(dev->dev,
280 slave_id,
281 port_num,
282 MLX4_PORT_CHANGE_SUBTYPE_DOWN);
283 }
284 }
285 }
286 }
287
288 static void aliasguid_query_handler(int status,
289 struct ib_sa_guidinfo_rec *guid_rec,
290 void *context)
291 {
292 struct mlx4_ib_dev *dev;
293 struct mlx4_alias_guid_work_context *cb_ctx = context;
294 u8 port_index ;
295 int i;
296 struct mlx4_sriov_alias_guid_info_rec_det *rec;
297 unsigned long flags, flags1;
298 ib_sa_comp_mask declined_guid_indexes = 0;
299 ib_sa_comp_mask applied_guid_indexes = 0;
300 unsigned int resched_delay_sec = 0;
301
302 if (!context)
303 return;
304
305 dev = cb_ctx->dev;
306 port_index = cb_ctx->port - 1;
307 rec = &dev->sriov.alias_guid.ports_guid[port_index].
308 all_rec_per_port[cb_ctx->block_num];
309
310 if (status) {
311 pr_debug("(port: %d) failed: status = %d\n",
312 cb_ctx->port, status);
313 rec->time_to_run = ktime_get_boot_ns() + 1 * NSEC_PER_SEC;
314 goto out;
315 }
316
317 if (guid_rec->block_num != cb_ctx->block_num) {
318 pr_err("block num mismatch: %d != %d\n",
319 cb_ctx->block_num, guid_rec->block_num);
320 goto out;
321 }
322
323 pr_debug("lid/port: %d/%d, block_num: %d\n",
324 be16_to_cpu(guid_rec->lid), cb_ctx->port,
325 guid_rec->block_num);
326
327 rec = &dev->sriov.alias_guid.ports_guid[port_index].
328 all_rec_per_port[guid_rec->block_num];
329
330 spin_lock_irqsave(&dev->sriov.alias_guid.ag_work_lock, flags);
331 for (i = 0 ; i < NUM_ALIAS_GUID_IN_REC; i++) {
332 __be64 sm_response, required_val;
333
334 if (!(cb_ctx->guid_indexes &
335 mlx4_ib_get_aguid_comp_mask_from_ix(i)))
336 continue;
337 sm_response = *(__be64 *)&guid_rec->guid_info_list
338 [i * GUID_REC_SIZE];
339 required_val = *(__be64 *)&rec->all_recs[i * GUID_REC_SIZE];
340 if (cb_ctx->method == MLX4_GUID_INFO_RECORD_DELETE) {
341 if (required_val ==
342 cpu_to_be64(MLX4_GUID_FOR_DELETE_VAL))
343 goto next_entry;
344
345 /* A new value was set till we got the response */
346 pr_debug("need to set new value %llx, record num %d, block_num:%d\n",
347 be64_to_cpu(required_val),
348 i, guid_rec->block_num);
349 goto entry_declined;
350 }
351
352 /* check if the SM didn't assign one of the records.
353 * if it didn't, re-ask for.
354 */
355 if (sm_response == MLX4_NOT_SET_GUID) {
356 if (rec->guids_retry_schedule[i] == 0)
357 mlx4_ib_warn(&dev->ib_dev,
358 "%s:Record num %d in block_num: %d was declined by SM\n",
359 __func__, i,
360 guid_rec->block_num);
361 goto entry_declined;
362 } else {
363 /* properly assigned record. */
364 /* We save the GUID we just got from the SM in the
365 * admin_guid in order to be persistent, and in the
366 * request from the sm the process will ask for the same GUID */
367 if (required_val &&
368 sm_response != required_val) {
369 /* Warn only on first retry */
370 if (rec->guids_retry_schedule[i] == 0)
371 mlx4_ib_warn(&dev->ib_dev, "%s: Failed to set"
372 " admin guid after SysAdmin "
373 "configuration. "
374 "Record num %d in block_num:%d "
375 "was declined by SM, "
376 "new val(0x%llx) was kept, SM returned (0x%llx)\n",
377 __func__, i,
378 guid_rec->block_num,
379 be64_to_cpu(required_val),
380 be64_to_cpu(sm_response));
381 goto entry_declined;
382 } else {
383 *(__be64 *)&rec->all_recs[i * GUID_REC_SIZE] =
384 sm_response;
385 if (required_val == 0)
386 mlx4_set_admin_guid(dev->dev,
387 sm_response,
388 (guid_rec->block_num
389 * NUM_ALIAS_GUID_IN_REC) + i,
390 cb_ctx->port);
391 goto next_entry;
392 }
393 }
394 entry_declined:
395 declined_guid_indexes |= mlx4_ib_get_aguid_comp_mask_from_ix(i);
396 rec->guids_retry_schedule[i] =
397 (rec->guids_retry_schedule[i] == 0) ? 1 :
398 min((unsigned int)60,
399 rec->guids_retry_schedule[i] * 2);
400 /* using the minimum value among all entries in that record */
401 resched_delay_sec = (resched_delay_sec == 0) ?
402 rec->guids_retry_schedule[i] :
403 min(resched_delay_sec,
404 rec->guids_retry_schedule[i]);
405 continue;
406
407 next_entry:
408 rec->guids_retry_schedule[i] = 0;
409 }
410
411 applied_guid_indexes = cb_ctx->guid_indexes & ~declined_guid_indexes;
412 if (declined_guid_indexes ||
413 rec->guid_indexes & ~(applied_guid_indexes)) {
414 pr_debug("record=%d wasn't fully set, guid_indexes=0x%llx applied_indexes=0x%llx, declined_indexes=0x%llx\n",
415 guid_rec->block_num,
416 be64_to_cpu((__force __be64)rec->guid_indexes),
417 be64_to_cpu((__force __be64)applied_guid_indexes),
418 be64_to_cpu((__force __be64)declined_guid_indexes));
419 rec->time_to_run = ktime_get_boot_ns() +
420 resched_delay_sec * NSEC_PER_SEC;
421 } else {
422 rec->status = MLX4_GUID_INFO_STATUS_SET;
423 }
424 spin_unlock_irqrestore(&dev->sriov.alias_guid.ag_work_lock, flags);
425 /*
426 The func is call here to close the cases when the
427 sm doesn't send smp, so in the sa response the driver
428 notifies the slave.
429 */
430 mlx4_ib_notify_slaves_on_guid_change(dev, guid_rec->block_num,
431 cb_ctx->port,
432 guid_rec->guid_info_list);
433 out:
434 spin_lock_irqsave(&dev->sriov.going_down_lock, flags);
435 spin_lock_irqsave(&dev->sriov.alias_guid.ag_work_lock, flags1);
436 if (!dev->sriov.is_going_down) {
437 get_low_record_time_index(dev, port_index, &resched_delay_sec);
438 queue_delayed_work(dev->sriov.alias_guid.ports_guid[port_index].wq,
439 &dev->sriov.alias_guid.ports_guid[port_index].
440 alias_guid_work,
441 msecs_to_jiffies(resched_delay_sec * 1000));
442 }
443 if (cb_ctx->sa_query) {
444 list_del(&cb_ctx->list);
445 kfree(cb_ctx);
446 } else
447 complete(&cb_ctx->done);
448 spin_unlock_irqrestore(&dev->sriov.alias_guid.ag_work_lock, flags1);
449 spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags);
450 }
451
452 static void invalidate_guid_record(struct mlx4_ib_dev *dev, u8 port, int index)
453 {
454 int i;
455 u64 cur_admin_val;
456 ib_sa_comp_mask comp_mask = 0;
457
458 dev->sriov.alias_guid.ports_guid[port - 1].all_rec_per_port[index].status
459 = MLX4_GUID_INFO_STATUS_SET;
460
461 /* calculate the comp_mask for that record.*/
462 for (i = 0; i < NUM_ALIAS_GUID_IN_REC; i++) {
463 cur_admin_val =
464 *(u64 *)&dev->sriov.alias_guid.ports_guid[port - 1].
465 all_rec_per_port[index].all_recs[GUID_REC_SIZE * i];
466 /*
467 check the admin value: if it's for delete (~00LL) or
468 it is the first guid of the first record (hw guid) or
469 the records is not in ownership of the sysadmin and the sm doesn't
470 need to assign GUIDs, then don't put it up for assignment.
471 */
472 if (MLX4_GUID_FOR_DELETE_VAL == cur_admin_val ||
473 (!index && !i))
474 continue;
475 comp_mask |= mlx4_ib_get_aguid_comp_mask_from_ix(i);
476 }
477 dev->sriov.alias_guid.ports_guid[port - 1].
478 all_rec_per_port[index].guid_indexes |= comp_mask;
479 if (dev->sriov.alias_guid.ports_guid[port - 1].
480 all_rec_per_port[index].guid_indexes)
481 dev->sriov.alias_guid.ports_guid[port - 1].
482 all_rec_per_port[index].status = MLX4_GUID_INFO_STATUS_IDLE;
483
484 }
485
486 static int set_guid_rec(struct ib_device *ibdev,
487 struct mlx4_next_alias_guid_work *rec)
488 {
489 int err;
490 struct mlx4_ib_dev *dev = to_mdev(ibdev);
491 struct ib_sa_guidinfo_rec guid_info_rec;
492 ib_sa_comp_mask comp_mask;
493 struct ib_port_attr attr;
494 struct mlx4_alias_guid_work_context *callback_context;
495 unsigned long resched_delay, flags, flags1;
496 u8 port = rec->port + 1;
497 int index = rec->block_num;
498 struct mlx4_sriov_alias_guid_info_rec_det *rec_det = &rec->rec_det;
499 struct list_head *head =
500 &dev->sriov.alias_guid.ports_guid[port - 1].cb_list;
501
502 memset(&attr, 0, sizeof(attr));
503 err = __mlx4_ib_query_port(ibdev, port, &attr, 1);
504 if (err) {
505 pr_debug("mlx4_ib_query_port failed (err: %d), port: %d\n",
506 err, port);
507 return err;
508 }
509 /*check the port was configured by the sm, otherwise no need to send */
510 if (attr.state != IB_PORT_ACTIVE) {
511 pr_debug("port %d not active...rescheduling\n", port);
512 resched_delay = 5 * HZ;
513 err = -EAGAIN;
514 goto new_schedule;
515 }
516
517 callback_context = kmalloc(sizeof *callback_context, GFP_KERNEL);
518 if (!callback_context) {
519 err = -ENOMEM;
520 resched_delay = HZ * 5;
521 goto new_schedule;
522 }
523 callback_context->port = port;
524 callback_context->dev = dev;
525 callback_context->block_num = index;
526 callback_context->guid_indexes = rec_det->guid_indexes;
527 callback_context->method = rec->method;
528
529 memset(&guid_info_rec, 0, sizeof (struct ib_sa_guidinfo_rec));
530
531 guid_info_rec.lid = ib_lid_be16(attr.lid);
532 guid_info_rec.block_num = index;
533
534 memcpy(guid_info_rec.guid_info_list, rec_det->all_recs,
535 GUID_REC_SIZE * NUM_ALIAS_GUID_IN_REC);
536 comp_mask = IB_SA_GUIDINFO_REC_LID | IB_SA_GUIDINFO_REC_BLOCK_NUM |
537 rec_det->guid_indexes;
538
539 init_completion(&callback_context->done);
540 spin_lock_irqsave(&dev->sriov.alias_guid.ag_work_lock, flags1);
541 list_add_tail(&callback_context->list, head);
542 spin_unlock_irqrestore(&dev->sriov.alias_guid.ag_work_lock, flags1);
543
544 callback_context->query_id =
545 ib_sa_guid_info_rec_query(dev->sriov.alias_guid.sa_client,
546 ibdev, port, &guid_info_rec,
547 comp_mask, rec->method, 1000,
548 GFP_KERNEL, aliasguid_query_handler,
549 callback_context,
550 &callback_context->sa_query);
551 if (callback_context->query_id < 0) {
552 pr_debug("ib_sa_guid_info_rec_query failed, query_id: "
553 "%d. will reschedule to the next 1 sec.\n",
554 callback_context->query_id);
555 spin_lock_irqsave(&dev->sriov.alias_guid.ag_work_lock, flags1);
556 list_del(&callback_context->list);
557 kfree(callback_context);
558 spin_unlock_irqrestore(&dev->sriov.alias_guid.ag_work_lock, flags1);
559 resched_delay = 1 * HZ;
560 err = -EAGAIN;
561 goto new_schedule;
562 }
563 err = 0;
564 goto out;
565
566 new_schedule:
567 spin_lock_irqsave(&dev->sriov.going_down_lock, flags);
568 spin_lock_irqsave(&dev->sriov.alias_guid.ag_work_lock, flags1);
569 invalidate_guid_record(dev, port, index);
570 if (!dev->sriov.is_going_down) {
571 queue_delayed_work(dev->sriov.alias_guid.ports_guid[port - 1].wq,
572 &dev->sriov.alias_guid.ports_guid[port - 1].alias_guid_work,
573 resched_delay);
574 }
575 spin_unlock_irqrestore(&dev->sriov.alias_guid.ag_work_lock, flags1);
576 spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags);
577
578 out:
579 return err;
580 }
581
582 static void mlx4_ib_guid_port_init(struct mlx4_ib_dev *dev, int port)
583 {
584 int j, k, entry;
585 __be64 guid;
586
587 /*Check if the SM doesn't need to assign the GUIDs*/
588 for (j = 0; j < NUM_ALIAS_GUID_REC_IN_PORT; j++) {
589 for (k = 0; k < NUM_ALIAS_GUID_IN_REC; k++) {
590 entry = j * NUM_ALIAS_GUID_IN_REC + k;
591 /* no request for the 0 entry (hw guid) */
592 if (!entry || entry > dev->dev->persist->num_vfs ||
593 !mlx4_is_slave_active(dev->dev, entry))
594 continue;
595 guid = mlx4_get_admin_guid(dev->dev, entry, port);
596 *(__be64 *)&dev->sriov.alias_guid.ports_guid[port - 1].
597 all_rec_per_port[j].all_recs
598 [GUID_REC_SIZE * k] = guid;
599 pr_debug("guid was set, entry=%d, val=0x%llx, port=%d\n",
600 entry,
601 be64_to_cpu(guid),
602 port);
603 }
604 }
605 }
606 void mlx4_ib_invalidate_all_guid_record(struct mlx4_ib_dev *dev, int port)
607 {
608 int i;
609 unsigned long flags, flags1;
610
611 pr_debug("port %d\n", port);
612
613 spin_lock_irqsave(&dev->sriov.going_down_lock, flags);
614 spin_lock_irqsave(&dev->sriov.alias_guid.ag_work_lock, flags1);
615
616 if (dev->sriov.alias_guid.ports_guid[port - 1].state_flags &
617 GUID_STATE_NEED_PORT_INIT) {
618 mlx4_ib_guid_port_init(dev, port);
619 dev->sriov.alias_guid.ports_guid[port - 1].state_flags &=
620 (~GUID_STATE_NEED_PORT_INIT);
621 }
622 for (i = 0; i < NUM_ALIAS_GUID_REC_IN_PORT; i++)
623 invalidate_guid_record(dev, port, i);
624
625 if (mlx4_is_master(dev->dev) && !dev->sriov.is_going_down) {
626 /*
627 make sure no work waits in the queue, if the work is already
628 queued(not on the timer) the cancel will fail. That is not a problem
629 because we just want the work started.
630 */
631 cancel_delayed_work(&dev->sriov.alias_guid.
632 ports_guid[port - 1].alias_guid_work);
633 queue_delayed_work(dev->sriov.alias_guid.ports_guid[port - 1].wq,
634 &dev->sriov.alias_guid.ports_guid[port - 1].alias_guid_work,
635 0);
636 }
637 spin_unlock_irqrestore(&dev->sriov.alias_guid.ag_work_lock, flags1);
638 spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags);
639 }
640
641 static void set_required_record(struct mlx4_ib_dev *dev, u8 port,
642 struct mlx4_next_alias_guid_work *next_rec,
643 int record_index)
644 {
645 int i;
646 int lowset_time_entry = -1;
647 int lowest_time = 0;
648 ib_sa_comp_mask delete_guid_indexes = 0;
649 ib_sa_comp_mask set_guid_indexes = 0;
650 struct mlx4_sriov_alias_guid_info_rec_det *rec =
651 &dev->sriov.alias_guid.ports_guid[port].
652 all_rec_per_port[record_index];
653
654 for (i = 0; i < NUM_ALIAS_GUID_IN_REC; i++) {
655 if (!(rec->guid_indexes &
656 mlx4_ib_get_aguid_comp_mask_from_ix(i)))
657 continue;
658
659 if (*(__be64 *)&rec->all_recs[i * GUID_REC_SIZE] ==
660 cpu_to_be64(MLX4_GUID_FOR_DELETE_VAL))
661 delete_guid_indexes |=
662 mlx4_ib_get_aguid_comp_mask_from_ix(i);
663 else
664 set_guid_indexes |=
665 mlx4_ib_get_aguid_comp_mask_from_ix(i);
666
667 if (lowset_time_entry == -1 || rec->guids_retry_schedule[i] <=
668 lowest_time) {
669 lowset_time_entry = i;
670 lowest_time = rec->guids_retry_schedule[i];
671 }
672 }
673
674 memcpy(&next_rec->rec_det, rec, sizeof(*rec));
675 next_rec->port = port;
676 next_rec->block_num = record_index;
677
678 if (*(__be64 *)&rec->all_recs[lowset_time_entry * GUID_REC_SIZE] ==
679 cpu_to_be64(MLX4_GUID_FOR_DELETE_VAL)) {
680 next_rec->rec_det.guid_indexes = delete_guid_indexes;
681 next_rec->method = MLX4_GUID_INFO_RECORD_DELETE;
682 } else {
683 next_rec->rec_det.guid_indexes = set_guid_indexes;
684 next_rec->method = MLX4_GUID_INFO_RECORD_SET;
685 }
686 }
687
688 /* return index of record that should be updated based on lowest
689 * rescheduled time
690 */
691 static int get_low_record_time_index(struct mlx4_ib_dev *dev, u8 port,
692 int *resched_delay_sec)
693 {
694 int record_index = -1;
695 u64 low_record_time = 0;
696 struct mlx4_sriov_alias_guid_info_rec_det rec;
697 int j;
698
699 for (j = 0; j < NUM_ALIAS_GUID_REC_IN_PORT; j++) {
700 rec = dev->sriov.alias_guid.ports_guid[port].
701 all_rec_per_port[j];
702 if (rec.status == MLX4_GUID_INFO_STATUS_IDLE &&
703 rec.guid_indexes) {
704 if (record_index == -1 ||
705 rec.time_to_run < low_record_time) {
706 record_index = j;
707 low_record_time = rec.time_to_run;
708 }
709 }
710 }
711 if (resched_delay_sec) {
712 u64 curr_time = ktime_get_boot_ns();
713
714 *resched_delay_sec = (low_record_time < curr_time) ? 0 :
715 div_u64((low_record_time - curr_time), NSEC_PER_SEC);
716 }
717
718 return record_index;
719 }
720
721 /* The function returns the next record that was
722 * not configured (or failed to be configured) */
723 static int get_next_record_to_update(struct mlx4_ib_dev *dev, u8 port,
724 struct mlx4_next_alias_guid_work *rec)
725 {
726 unsigned long flags;
727 int record_index;
728 int ret = 0;
729
730 spin_lock_irqsave(&dev->sriov.alias_guid.ag_work_lock, flags);
731 record_index = get_low_record_time_index(dev, port, NULL);
732
733 if (record_index < 0) {
734 ret = -ENOENT;
735 goto out;
736 }
737
738 set_required_record(dev, port, rec, record_index);
739 out:
740 spin_unlock_irqrestore(&dev->sriov.alias_guid.ag_work_lock, flags);
741 return ret;
742 }
743
744 static void alias_guid_work(struct work_struct *work)
745 {
746 struct delayed_work *delay = to_delayed_work(work);
747 int ret = 0;
748 struct mlx4_next_alias_guid_work *rec;
749 struct mlx4_sriov_alias_guid_port_rec_det *sriov_alias_port =
750 container_of(delay, struct mlx4_sriov_alias_guid_port_rec_det,
751 alias_guid_work);
752 struct mlx4_sriov_alias_guid *sriov_alias_guid = sriov_alias_port->parent;
753 struct mlx4_ib_sriov *ib_sriov = container_of(sriov_alias_guid,
754 struct mlx4_ib_sriov,
755 alias_guid);
756 struct mlx4_ib_dev *dev = container_of(ib_sriov, struct mlx4_ib_dev, sriov);
757
758 rec = kzalloc(sizeof *rec, GFP_KERNEL);
759 if (!rec)
760 return;
761
762 pr_debug("starting [port: %d]...\n", sriov_alias_port->port + 1);
763 ret = get_next_record_to_update(dev, sriov_alias_port->port, rec);
764 if (ret) {
765 pr_debug("No more records to update.\n");
766 goto out;
767 }
768
769 set_guid_rec(&dev->ib_dev, rec);
770 out:
771 kfree(rec);
772 }
773
774
775 void mlx4_ib_init_alias_guid_work(struct mlx4_ib_dev *dev, int port)
776 {
777 unsigned long flags, flags1;
778
779 if (!mlx4_is_master(dev->dev))
780 return;
781 spin_lock_irqsave(&dev->sriov.going_down_lock, flags);
782 spin_lock_irqsave(&dev->sriov.alias_guid.ag_work_lock, flags1);
783 if (!dev->sriov.is_going_down) {
784 /* If there is pending one should cancel then run, otherwise
785 * won't run till previous one is ended as same work
786 * struct is used.
787 */
788 cancel_delayed_work(&dev->sriov.alias_guid.ports_guid[port].
789 alias_guid_work);
790 queue_delayed_work(dev->sriov.alias_guid.ports_guid[port].wq,
791 &dev->sriov.alias_guid.ports_guid[port].alias_guid_work, 0);
792 }
793 spin_unlock_irqrestore(&dev->sriov.alias_guid.ag_work_lock, flags1);
794 spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags);
795 }
796
797 void mlx4_ib_destroy_alias_guid_service(struct mlx4_ib_dev *dev)
798 {
799 int i;
800 struct mlx4_ib_sriov *sriov = &dev->sriov;
801 struct mlx4_alias_guid_work_context *cb_ctx;
802 struct mlx4_sriov_alias_guid_port_rec_det *det;
803 struct ib_sa_query *sa_query;
804 unsigned long flags;
805
806 for (i = 0 ; i < dev->num_ports; i++) {
807 cancel_delayed_work(&dev->sriov.alias_guid.ports_guid[i].alias_guid_work);
808 det = &sriov->alias_guid.ports_guid[i];
809 spin_lock_irqsave(&sriov->alias_guid.ag_work_lock, flags);
810 while (!list_empty(&det->cb_list)) {
811 cb_ctx = list_entry(det->cb_list.next,
812 struct mlx4_alias_guid_work_context,
813 list);
814 sa_query = cb_ctx->sa_query;
815 cb_ctx->sa_query = NULL;
816 list_del(&cb_ctx->list);
817 spin_unlock_irqrestore(&sriov->alias_guid.ag_work_lock, flags);
818 ib_sa_cancel_query(cb_ctx->query_id, sa_query);
819 wait_for_completion(&cb_ctx->done);
820 kfree(cb_ctx);
821 spin_lock_irqsave(&sriov->alias_guid.ag_work_lock, flags);
822 }
823 spin_unlock_irqrestore(&sriov->alias_guid.ag_work_lock, flags);
824 }
825 for (i = 0 ; i < dev->num_ports; i++) {
826 flush_workqueue(dev->sriov.alias_guid.ports_guid[i].wq);
827 destroy_workqueue(dev->sriov.alias_guid.ports_guid[i].wq);
828 }
829 ib_sa_unregister_client(dev->sriov.alias_guid.sa_client);
830 kfree(dev->sriov.alias_guid.sa_client);
831 }
832
833 int mlx4_ib_init_alias_guid_service(struct mlx4_ib_dev *dev)
834 {
835 char alias_wq_name[15];
836 int ret = 0;
837 int i, j;
838 union ib_gid gid;
839
840 if (!mlx4_is_master(dev->dev))
841 return 0;
842 dev->sriov.alias_guid.sa_client =
843 kzalloc(sizeof *dev->sriov.alias_guid.sa_client, GFP_KERNEL);
844 if (!dev->sriov.alias_guid.sa_client)
845 return -ENOMEM;
846
847 ib_sa_register_client(dev->sriov.alias_guid.sa_client);
848
849 spin_lock_init(&dev->sriov.alias_guid.ag_work_lock);
850
851 for (i = 1; i <= dev->num_ports; ++i) {
852 if (dev->ib_dev.query_gid(&dev->ib_dev , i, 0, &gid)) {
853 ret = -EFAULT;
854 goto err_unregister;
855 }
856 }
857
858 for (i = 0 ; i < dev->num_ports; i++) {
859 memset(&dev->sriov.alias_guid.ports_guid[i], 0,
860 sizeof (struct mlx4_sriov_alias_guid_port_rec_det));
861 dev->sriov.alias_guid.ports_guid[i].state_flags |=
862 GUID_STATE_NEED_PORT_INIT;
863 for (j = 0; j < NUM_ALIAS_GUID_REC_IN_PORT; j++) {
864 /* mark each val as it was deleted */
865 memset(dev->sriov.alias_guid.ports_guid[i].
866 all_rec_per_port[j].all_recs, 0xFF,
867 sizeof(dev->sriov.alias_guid.ports_guid[i].
868 all_rec_per_port[j].all_recs));
869 }
870 INIT_LIST_HEAD(&dev->sriov.alias_guid.ports_guid[i].cb_list);
871 /*prepare the records, set them to be allocated by sm*/
872 if (mlx4_ib_sm_guid_assign)
873 for (j = 1; j < NUM_ALIAS_GUID_PER_PORT; j++)
874 mlx4_set_admin_guid(dev->dev, 0, j, i + 1);
875 for (j = 0 ; j < NUM_ALIAS_GUID_REC_IN_PORT; j++)
876 invalidate_guid_record(dev, i + 1, j);
877
878 dev->sriov.alias_guid.ports_guid[i].parent = &dev->sriov.alias_guid;
879 dev->sriov.alias_guid.ports_guid[i].port = i;
880
881 snprintf(alias_wq_name, sizeof alias_wq_name, "alias_guid%d", i);
882 dev->sriov.alias_guid.ports_guid[i].wq =
883 alloc_ordered_workqueue(alias_wq_name, WQ_MEM_RECLAIM);
884 if (!dev->sriov.alias_guid.ports_guid[i].wq) {
885 ret = -ENOMEM;
886 goto err_thread;
887 }
888 INIT_DELAYED_WORK(&dev->sriov.alias_guid.ports_guid[i].alias_guid_work,
889 alias_guid_work);
890 }
891 return 0;
892
893 err_thread:
894 for (--i; i >= 0; i--) {
895 destroy_workqueue(dev->sriov.alias_guid.ports_guid[i].wq);
896 dev->sriov.alias_guid.ports_guid[i].wq = NULL;
897 }
898
899 err_unregister:
900 ib_sa_unregister_client(dev->sriov.alias_guid.sa_client);
901 kfree(dev->sriov.alias_guid.sa_client);
902 dev->sriov.alias_guid.sa_client = NULL;
903 pr_err("init_alias_guid_service: Failed. (ret:%d)\n", ret);
904 return ret;
905 }
CRIS linux kernel tree