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b9c5d6a6 OD |
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 | #include <rdma/ib_mad.h> | |
34 | #include <rdma/ib_smi.h> | |
35 | #include <rdma/ib_cache.h> | |
36 | #include <rdma/ib_sa.h> | |
37 | ||
38 | #include <linux/mlx4/cmd.h> | |
39 | #include <linux/rbtree.h> | |
40 | #include <linux/delay.h> | |
41 | ||
42 | #include "mlx4_ib.h" | |
43 | ||
44 | #define MAX_VFS 80 | |
45 | #define MAX_PEND_REQS_PER_FUNC 4 | |
46 | #define MAD_TIMEOUT_MS 2000 | |
47 | ||
48 | #define mcg_warn(fmt, arg...) pr_warn("MCG WARNING: " fmt, ##arg) | |
49 | #define mcg_error(fmt, arg...) pr_err(fmt, ##arg) | |
50 | #define mcg_warn_group(group, format, arg...) \ | |
51 | pr_warn("%s-%d: %16s (port %d): WARNING: " format, __func__, __LINE__,\ | |
52 | (group)->name, group->demux->port, ## arg) | |
53 | ||
54 | #define mcg_error_group(group, format, arg...) \ | |
55 | pr_err(" %16s: " format, (group)->name, ## arg) | |
56 | ||
57 | ||
58 | static union ib_gid mgid0; | |
59 | ||
60 | static struct workqueue_struct *clean_wq; | |
61 | ||
62 | enum mcast_state { | |
63 | MCAST_NOT_MEMBER = 0, | |
64 | MCAST_MEMBER, | |
65 | }; | |
66 | ||
67 | enum mcast_group_state { | |
68 | MCAST_IDLE, | |
69 | MCAST_JOIN_SENT, | |
70 | MCAST_LEAVE_SENT, | |
71 | MCAST_RESP_READY | |
72 | }; | |
73 | ||
74 | struct mcast_member { | |
75 | enum mcast_state state; | |
76 | uint8_t join_state; | |
77 | int num_pend_reqs; | |
78 | struct list_head pending; | |
79 | }; | |
80 | ||
81 | struct ib_sa_mcmember_data { | |
82 | union ib_gid mgid; | |
83 | union ib_gid port_gid; | |
84 | __be32 qkey; | |
85 | __be16 mlid; | |
86 | u8 mtusel_mtu; | |
87 | u8 tclass; | |
88 | __be16 pkey; | |
89 | u8 ratesel_rate; | |
90 | u8 lifetmsel_lifetm; | |
91 | __be32 sl_flowlabel_hoplimit; | |
92 | u8 scope_join_state; | |
93 | u8 proxy_join; | |
94 | u8 reserved[2]; | |
95 | }; | |
96 | ||
97 | struct mcast_group { | |
98 | struct ib_sa_mcmember_data rec; | |
99 | struct rb_node node; | |
100 | struct list_head mgid0_list; | |
101 | struct mlx4_ib_demux_ctx *demux; | |
102 | struct mcast_member func[MAX_VFS]; | |
103 | struct mutex lock; | |
104 | struct work_struct work; | |
105 | struct list_head pending_list; | |
106 | int members[3]; | |
107 | enum mcast_group_state state; | |
108 | enum mcast_group_state prev_state; | |
109 | struct ib_sa_mad response_sa_mad; | |
110 | __be64 last_req_tid; | |
111 | ||
112 | char name[33]; /* MGID string */ | |
c1e7e466 | 113 | struct device_attribute dentry; |
b9c5d6a6 OD |
114 | |
115 | /* refcount is the reference count for the following: | |
116 | 1. Each queued request | |
117 | 2. Each invocation of the worker thread | |
118 | 3. Membership of the port at the SA | |
119 | */ | |
120 | atomic_t refcount; | |
121 | ||
122 | /* delayed work to clean pending SM request */ | |
123 | struct delayed_work timeout_work; | |
124 | struct list_head cleanup_list; | |
125 | }; | |
126 | ||
127 | struct mcast_req { | |
128 | int func; | |
129 | struct ib_sa_mad sa_mad; | |
130 | struct list_head group_list; | |
131 | struct list_head func_list; | |
132 | struct mcast_group *group; | |
133 | int clean; | |
134 | }; | |
135 | ||
136 | ||
137 | #define safe_atomic_dec(ref) \ | |
138 | do {\ | |
139 | if (atomic_dec_and_test(ref)) \ | |
140 | mcg_warn_group(group, "did not expect to reach zero\n"); \ | |
141 | } while (0) | |
142 | ||
143 | static const char *get_state_string(enum mcast_group_state state) | |
144 | { | |
145 | switch (state) { | |
146 | case MCAST_IDLE: | |
147 | return "MCAST_IDLE"; | |
148 | case MCAST_JOIN_SENT: | |
149 | return "MCAST_JOIN_SENT"; | |
150 | case MCAST_LEAVE_SENT: | |
151 | return "MCAST_LEAVE_SENT"; | |
152 | case MCAST_RESP_READY: | |
153 | return "MCAST_RESP_READY"; | |
154 | } | |
155 | return "Invalid State"; | |
156 | } | |
157 | ||
158 | static struct mcast_group *mcast_find(struct mlx4_ib_demux_ctx *ctx, | |
159 | union ib_gid *mgid) | |
160 | { | |
161 | struct rb_node *node = ctx->mcg_table.rb_node; | |
162 | struct mcast_group *group; | |
163 | int ret; | |
164 | ||
165 | while (node) { | |
166 | group = rb_entry(node, struct mcast_group, node); | |
167 | ret = memcmp(mgid->raw, group->rec.mgid.raw, sizeof *mgid); | |
168 | if (!ret) | |
169 | return group; | |
170 | ||
171 | if (ret < 0) | |
172 | node = node->rb_left; | |
173 | else | |
174 | node = node->rb_right; | |
175 | } | |
176 | return NULL; | |
177 | } | |
178 | ||
179 | static struct mcast_group *mcast_insert(struct mlx4_ib_demux_ctx *ctx, | |
180 | struct mcast_group *group) | |
181 | { | |
182 | struct rb_node **link = &ctx->mcg_table.rb_node; | |
183 | struct rb_node *parent = NULL; | |
184 | struct mcast_group *cur_group; | |
185 | int ret; | |
186 | ||
187 | while (*link) { | |
188 | parent = *link; | |
189 | cur_group = rb_entry(parent, struct mcast_group, node); | |
190 | ||
191 | ret = memcmp(group->rec.mgid.raw, cur_group->rec.mgid.raw, | |
192 | sizeof group->rec.mgid); | |
193 | if (ret < 0) | |
194 | link = &(*link)->rb_left; | |
195 | else if (ret > 0) | |
196 | link = &(*link)->rb_right; | |
197 | else | |
198 | return cur_group; | |
199 | } | |
200 | rb_link_node(&group->node, parent, link); | |
201 | rb_insert_color(&group->node, &ctx->mcg_table); | |
202 | return NULL; | |
203 | } | |
204 | ||
205 | static int send_mad_to_wire(struct mlx4_ib_demux_ctx *ctx, struct ib_mad *mad) | |
206 | { | |
207 | struct mlx4_ib_dev *dev = ctx->dev; | |
208 | struct ib_ah_attr ah_attr; | |
209 | ||
210 | spin_lock(&dev->sm_lock); | |
211 | if (!dev->sm_ah[ctx->port - 1]) { | |
212 | /* port is not yet Active, sm_ah not ready */ | |
213 | spin_unlock(&dev->sm_lock); | |
214 | return -EAGAIN; | |
215 | } | |
216 | mlx4_ib_query_ah(dev->sm_ah[ctx->port - 1], &ah_attr); | |
217 | spin_unlock(&dev->sm_lock); | |
5ea8bbfc JM |
218 | return mlx4_ib_send_to_wire(dev, mlx4_master_func_num(dev->dev), |
219 | ctx->port, IB_QPT_GSI, 0, 1, IB_QP1_QKEY, | |
220 | &ah_attr, NULL, mad); | |
b9c5d6a6 OD |
221 | } |
222 | ||
223 | static int send_mad_to_slave(int slave, struct mlx4_ib_demux_ctx *ctx, | |
224 | struct ib_mad *mad) | |
225 | { | |
226 | struct mlx4_ib_dev *dev = ctx->dev; | |
227 | struct ib_mad_agent *agent = dev->send_agent[ctx->port - 1][1]; | |
228 | struct ib_wc wc; | |
229 | struct ib_ah_attr ah_attr; | |
230 | ||
231 | /* Our agent might not yet be registered when mads start to arrive */ | |
232 | if (!agent) | |
233 | return -EAGAIN; | |
234 | ||
235 | ib_query_ah(dev->sm_ah[ctx->port - 1], &ah_attr); | |
236 | ||
2c75d2cc JM |
237 | if (ib_find_cached_pkey(&dev->ib_dev, ctx->port, IB_DEFAULT_PKEY_FULL, &wc.pkey_index)) |
238 | return -EINVAL; | |
b9c5d6a6 OD |
239 | wc.sl = 0; |
240 | wc.dlid_path_bits = 0; | |
241 | wc.port_num = ctx->port; | |
242 | wc.slid = ah_attr.dlid; /* opensm lid */ | |
243 | wc.src_qp = 1; | |
244 | return mlx4_ib_send_to_slave(dev, slave, ctx->port, IB_QPT_GSI, &wc, NULL, mad); | |
245 | } | |
246 | ||
247 | static int send_join_to_wire(struct mcast_group *group, struct ib_sa_mad *sa_mad) | |
248 | { | |
249 | struct ib_sa_mad mad; | |
250 | struct ib_sa_mcmember_data *sa_mad_data = (struct ib_sa_mcmember_data *)&mad.data; | |
251 | int ret; | |
252 | ||
253 | /* we rely on a mad request as arrived from a VF */ | |
254 | memcpy(&mad, sa_mad, sizeof mad); | |
255 | ||
256 | /* fix port GID to be the real one (slave 0) */ | |
257 | sa_mad_data->port_gid.global.interface_id = group->demux->guid_cache[0]; | |
258 | ||
259 | /* assign our own TID */ | |
260 | mad.mad_hdr.tid = mlx4_ib_get_new_demux_tid(group->demux); | |
261 | group->last_req_tid = mad.mad_hdr.tid; /* keep it for later validation */ | |
262 | ||
263 | ret = send_mad_to_wire(group->demux, (struct ib_mad *)&mad); | |
264 | /* set timeout handler */ | |
265 | if (!ret) { | |
266 | /* calls mlx4_ib_mcg_timeout_handler */ | |
267 | queue_delayed_work(group->demux->mcg_wq, &group->timeout_work, | |
268 | msecs_to_jiffies(MAD_TIMEOUT_MS)); | |
269 | } | |
270 | ||
271 | return ret; | |
272 | } | |
273 | ||
274 | static int send_leave_to_wire(struct mcast_group *group, u8 join_state) | |
275 | { | |
276 | struct ib_sa_mad mad; | |
277 | struct ib_sa_mcmember_data *sa_data = (struct ib_sa_mcmember_data *)&mad.data; | |
278 | int ret; | |
279 | ||
280 | memset(&mad, 0, sizeof mad); | |
281 | mad.mad_hdr.base_version = 1; | |
282 | mad.mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM; | |
283 | mad.mad_hdr.class_version = 2; | |
284 | mad.mad_hdr.method = IB_SA_METHOD_DELETE; | |
285 | mad.mad_hdr.status = cpu_to_be16(0); | |
286 | mad.mad_hdr.class_specific = cpu_to_be16(0); | |
287 | mad.mad_hdr.tid = mlx4_ib_get_new_demux_tid(group->demux); | |
288 | group->last_req_tid = mad.mad_hdr.tid; /* keep it for later validation */ | |
289 | mad.mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC); | |
290 | mad.mad_hdr.attr_mod = cpu_to_be32(0); | |
291 | mad.sa_hdr.sm_key = 0x0; | |
292 | mad.sa_hdr.attr_offset = cpu_to_be16(7); | |
293 | mad.sa_hdr.comp_mask = IB_SA_MCMEMBER_REC_MGID | | |
294 | IB_SA_MCMEMBER_REC_PORT_GID | IB_SA_MCMEMBER_REC_JOIN_STATE; | |
295 | ||
296 | *sa_data = group->rec; | |
297 | sa_data->scope_join_state = join_state; | |
298 | ||
299 | ret = send_mad_to_wire(group->demux, (struct ib_mad *)&mad); | |
300 | if (ret) | |
301 | group->state = MCAST_IDLE; | |
302 | ||
303 | /* set timeout handler */ | |
304 | if (!ret) { | |
305 | /* calls mlx4_ib_mcg_timeout_handler */ | |
306 | queue_delayed_work(group->demux->mcg_wq, &group->timeout_work, | |
307 | msecs_to_jiffies(MAD_TIMEOUT_MS)); | |
308 | } | |
309 | ||
310 | return ret; | |
311 | } | |
312 | ||
313 | static int send_reply_to_slave(int slave, struct mcast_group *group, | |
314 | struct ib_sa_mad *req_sa_mad, u16 status) | |
315 | { | |
316 | struct ib_sa_mad mad; | |
317 | struct ib_sa_mcmember_data *sa_data = (struct ib_sa_mcmember_data *)&mad.data; | |
318 | struct ib_sa_mcmember_data *req_sa_data = (struct ib_sa_mcmember_data *)&req_sa_mad->data; | |
319 | int ret; | |
320 | ||
321 | memset(&mad, 0, sizeof mad); | |
322 | mad.mad_hdr.base_version = 1; | |
323 | mad.mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM; | |
324 | mad.mad_hdr.class_version = 2; | |
325 | mad.mad_hdr.method = IB_MGMT_METHOD_GET_RESP; | |
326 | mad.mad_hdr.status = cpu_to_be16(status); | |
327 | mad.mad_hdr.class_specific = cpu_to_be16(0); | |
328 | mad.mad_hdr.tid = req_sa_mad->mad_hdr.tid; | |
329 | *(u8 *)&mad.mad_hdr.tid = 0; /* resetting tid to 0 */ | |
330 | mad.mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC); | |
331 | mad.mad_hdr.attr_mod = cpu_to_be32(0); | |
332 | mad.sa_hdr.sm_key = req_sa_mad->sa_hdr.sm_key; | |
333 | mad.sa_hdr.attr_offset = cpu_to_be16(7); | |
334 | mad.sa_hdr.comp_mask = 0; /* ignored on responses, see IBTA spec */ | |
335 | ||
336 | *sa_data = group->rec; | |
337 | ||
338 | /* reconstruct VF's requested join_state and port_gid */ | |
339 | sa_data->scope_join_state &= 0xf0; | |
340 | sa_data->scope_join_state |= (group->func[slave].join_state & 0x0f); | |
341 | memcpy(&sa_data->port_gid, &req_sa_data->port_gid, sizeof req_sa_data->port_gid); | |
342 | ||
343 | ret = send_mad_to_slave(slave, group->demux, (struct ib_mad *)&mad); | |
344 | return ret; | |
345 | } | |
346 | ||
347 | static int check_selector(ib_sa_comp_mask comp_mask, | |
348 | ib_sa_comp_mask selector_mask, | |
349 | ib_sa_comp_mask value_mask, | |
350 | u8 src_value, u8 dst_value) | |
351 | { | |
352 | int err; | |
353 | u8 selector = dst_value >> 6; | |
354 | dst_value &= 0x3f; | |
355 | src_value &= 0x3f; | |
356 | ||
357 | if (!(comp_mask & selector_mask) || !(comp_mask & value_mask)) | |
358 | return 0; | |
359 | ||
360 | switch (selector) { | |
361 | case IB_SA_GT: | |
362 | err = (src_value <= dst_value); | |
363 | break; | |
364 | case IB_SA_LT: | |
365 | err = (src_value >= dst_value); | |
366 | break; | |
367 | case IB_SA_EQ: | |
368 | err = (src_value != dst_value); | |
369 | break; | |
370 | default: | |
371 | err = 0; | |
372 | break; | |
373 | } | |
374 | ||
375 | return err; | |
376 | } | |
377 | ||
378 | static u16 cmp_rec(struct ib_sa_mcmember_data *src, | |
379 | struct ib_sa_mcmember_data *dst, ib_sa_comp_mask comp_mask) | |
380 | { | |
381 | /* src is group record, dst is request record */ | |
382 | /* MGID must already match */ | |
383 | /* Port_GID we always replace to our Port_GID, so it is a match */ | |
384 | ||
385 | #define MAD_STATUS_REQ_INVALID 0x0200 | |
386 | if (comp_mask & IB_SA_MCMEMBER_REC_QKEY && src->qkey != dst->qkey) | |
387 | return MAD_STATUS_REQ_INVALID; | |
388 | if (comp_mask & IB_SA_MCMEMBER_REC_MLID && src->mlid != dst->mlid) | |
389 | return MAD_STATUS_REQ_INVALID; | |
390 | if (check_selector(comp_mask, IB_SA_MCMEMBER_REC_MTU_SELECTOR, | |
391 | IB_SA_MCMEMBER_REC_MTU, | |
392 | src->mtusel_mtu, dst->mtusel_mtu)) | |
393 | return MAD_STATUS_REQ_INVALID; | |
394 | if (comp_mask & IB_SA_MCMEMBER_REC_TRAFFIC_CLASS && | |
395 | src->tclass != dst->tclass) | |
396 | return MAD_STATUS_REQ_INVALID; | |
397 | if (comp_mask & IB_SA_MCMEMBER_REC_PKEY && src->pkey != dst->pkey) | |
398 | return MAD_STATUS_REQ_INVALID; | |
399 | if (check_selector(comp_mask, IB_SA_MCMEMBER_REC_RATE_SELECTOR, | |
400 | IB_SA_MCMEMBER_REC_RATE, | |
401 | src->ratesel_rate, dst->ratesel_rate)) | |
402 | return MAD_STATUS_REQ_INVALID; | |
403 | if (check_selector(comp_mask, | |
404 | IB_SA_MCMEMBER_REC_PACKET_LIFE_TIME_SELECTOR, | |
405 | IB_SA_MCMEMBER_REC_PACKET_LIFE_TIME, | |
406 | src->lifetmsel_lifetm, dst->lifetmsel_lifetm)) | |
407 | return MAD_STATUS_REQ_INVALID; | |
408 | if (comp_mask & IB_SA_MCMEMBER_REC_SL && | |
409 | (be32_to_cpu(src->sl_flowlabel_hoplimit) & 0xf0000000) != | |
410 | (be32_to_cpu(dst->sl_flowlabel_hoplimit) & 0xf0000000)) | |
411 | return MAD_STATUS_REQ_INVALID; | |
412 | if (comp_mask & IB_SA_MCMEMBER_REC_FLOW_LABEL && | |
413 | (be32_to_cpu(src->sl_flowlabel_hoplimit) & 0x0fffff00) != | |
414 | (be32_to_cpu(dst->sl_flowlabel_hoplimit) & 0x0fffff00)) | |
415 | return MAD_STATUS_REQ_INVALID; | |
416 | if (comp_mask & IB_SA_MCMEMBER_REC_HOP_LIMIT && | |
417 | (be32_to_cpu(src->sl_flowlabel_hoplimit) & 0x000000ff) != | |
418 | (be32_to_cpu(dst->sl_flowlabel_hoplimit) & 0x000000ff)) | |
419 | return MAD_STATUS_REQ_INVALID; | |
420 | if (comp_mask & IB_SA_MCMEMBER_REC_SCOPE && | |
421 | (src->scope_join_state & 0xf0) != | |
422 | (dst->scope_join_state & 0xf0)) | |
423 | return MAD_STATUS_REQ_INVALID; | |
424 | ||
425 | /* join_state checked separately, proxy_join ignored */ | |
426 | ||
427 | return 0; | |
428 | } | |
429 | ||
430 | /* release group, return 1 if this was last release and group is destroyed | |
431 | * timout work is canceled sync */ | |
432 | static int release_group(struct mcast_group *group, int from_timeout_handler) | |
433 | { | |
434 | struct mlx4_ib_demux_ctx *ctx = group->demux; | |
435 | int nzgroup; | |
436 | ||
437 | mutex_lock(&ctx->mcg_table_lock); | |
438 | mutex_lock(&group->lock); | |
439 | if (atomic_dec_and_test(&group->refcount)) { | |
440 | if (!from_timeout_handler) { | |
441 | if (group->state != MCAST_IDLE && | |
442 | !cancel_delayed_work(&group->timeout_work)) { | |
443 | atomic_inc(&group->refcount); | |
444 | mutex_unlock(&group->lock); | |
445 | mutex_unlock(&ctx->mcg_table_lock); | |
446 | return 0; | |
447 | } | |
448 | } | |
449 | ||
450 | nzgroup = memcmp(&group->rec.mgid, &mgid0, sizeof mgid0); | |
c1e7e466 JM |
451 | if (nzgroup) |
452 | del_sysfs_port_mcg_attr(ctx->dev, ctx->port, &group->dentry.attr); | |
b9c5d6a6 OD |
453 | if (!list_empty(&group->pending_list)) |
454 | mcg_warn_group(group, "releasing a group with non empty pending list\n"); | |
455 | if (nzgroup) | |
456 | rb_erase(&group->node, &ctx->mcg_table); | |
457 | list_del_init(&group->mgid0_list); | |
458 | mutex_unlock(&group->lock); | |
459 | mutex_unlock(&ctx->mcg_table_lock); | |
460 | kfree(group); | |
461 | return 1; | |
462 | } else { | |
463 | mutex_unlock(&group->lock); | |
464 | mutex_unlock(&ctx->mcg_table_lock); | |
465 | } | |
466 | return 0; | |
467 | } | |
468 | ||
469 | static void adjust_membership(struct mcast_group *group, u8 join_state, int inc) | |
470 | { | |
471 | int i; | |
472 | ||
473 | for (i = 0; i < 3; i++, join_state >>= 1) | |
474 | if (join_state & 0x1) | |
475 | group->members[i] += inc; | |
476 | } | |
477 | ||
478 | static u8 get_leave_state(struct mcast_group *group) | |
479 | { | |
480 | u8 leave_state = 0; | |
481 | int i; | |
482 | ||
483 | for (i = 0; i < 3; i++) | |
484 | if (!group->members[i]) | |
485 | leave_state |= (1 << i); | |
486 | ||
487 | return leave_state & (group->rec.scope_join_state & 7); | |
488 | } | |
489 | ||
490 | static int join_group(struct mcast_group *group, int slave, u8 join_mask) | |
491 | { | |
492 | int ret = 0; | |
493 | u8 join_state; | |
494 | ||
495 | /* remove bits that slave is already member of, and adjust */ | |
496 | join_state = join_mask & (~group->func[slave].join_state); | |
497 | adjust_membership(group, join_state, 1); | |
498 | group->func[slave].join_state |= join_state; | |
499 | if (group->func[slave].state != MCAST_MEMBER && join_state) { | |
500 | group->func[slave].state = MCAST_MEMBER; | |
501 | ret = 1; | |
502 | } | |
503 | return ret; | |
504 | } | |
505 | ||
506 | static int leave_group(struct mcast_group *group, int slave, u8 leave_state) | |
507 | { | |
508 | int ret = 0; | |
509 | ||
510 | adjust_membership(group, leave_state, -1); | |
511 | group->func[slave].join_state &= ~leave_state; | |
512 | if (!group->func[slave].join_state) { | |
513 | group->func[slave].state = MCAST_NOT_MEMBER; | |
514 | ret = 1; | |
515 | } | |
516 | return ret; | |
517 | } | |
518 | ||
519 | static int check_leave(struct mcast_group *group, int slave, u8 leave_mask) | |
520 | { | |
521 | if (group->func[slave].state != MCAST_MEMBER) | |
522 | return MAD_STATUS_REQ_INVALID; | |
523 | ||
524 | /* make sure we're not deleting unset bits */ | |
525 | if (~group->func[slave].join_state & leave_mask) | |
526 | return MAD_STATUS_REQ_INVALID; | |
527 | ||
528 | if (!leave_mask) | |
529 | return MAD_STATUS_REQ_INVALID; | |
530 | ||
531 | return 0; | |
532 | } | |
533 | ||
534 | static void mlx4_ib_mcg_timeout_handler(struct work_struct *work) | |
535 | { | |
536 | struct delayed_work *delay = to_delayed_work(work); | |
537 | struct mcast_group *group; | |
538 | struct mcast_req *req = NULL; | |
539 | ||
540 | group = container_of(delay, typeof(*group), timeout_work); | |
541 | ||
542 | mutex_lock(&group->lock); | |
543 | if (group->state == MCAST_JOIN_SENT) { | |
544 | if (!list_empty(&group->pending_list)) { | |
545 | req = list_first_entry(&group->pending_list, struct mcast_req, group_list); | |
546 | list_del(&req->group_list); | |
547 | list_del(&req->func_list); | |
548 | --group->func[req->func].num_pend_reqs; | |
549 | mutex_unlock(&group->lock); | |
550 | kfree(req); | |
551 | if (memcmp(&group->rec.mgid, &mgid0, sizeof mgid0)) { | |
552 | if (release_group(group, 1)) | |
553 | return; | |
554 | } else { | |
555 | kfree(group); | |
556 | return; | |
557 | } | |
558 | mutex_lock(&group->lock); | |
559 | } else | |
560 | mcg_warn_group(group, "DRIVER BUG\n"); | |
561 | } else if (group->state == MCAST_LEAVE_SENT) { | |
562 | if (group->rec.scope_join_state & 7) | |
563 | group->rec.scope_join_state &= 0xf8; | |
564 | group->state = MCAST_IDLE; | |
565 | mutex_unlock(&group->lock); | |
566 | if (release_group(group, 1)) | |
567 | return; | |
568 | mutex_lock(&group->lock); | |
569 | } else | |
570 | mcg_warn_group(group, "invalid state %s\n", get_state_string(group->state)); | |
571 | group->state = MCAST_IDLE; | |
572 | atomic_inc(&group->refcount); | |
573 | if (!queue_work(group->demux->mcg_wq, &group->work)) | |
574 | safe_atomic_dec(&group->refcount); | |
575 | ||
576 | mutex_unlock(&group->lock); | |
577 | } | |
578 | ||
579 | static int handle_leave_req(struct mcast_group *group, u8 leave_mask, | |
580 | struct mcast_req *req) | |
581 | { | |
582 | u16 status; | |
583 | ||
584 | if (req->clean) | |
585 | leave_mask = group->func[req->func].join_state; | |
586 | ||
587 | status = check_leave(group, req->func, leave_mask); | |
588 | if (!status) | |
589 | leave_group(group, req->func, leave_mask); | |
590 | ||
591 | if (!req->clean) | |
592 | send_reply_to_slave(req->func, group, &req->sa_mad, status); | |
593 | --group->func[req->func].num_pend_reqs; | |
594 | list_del(&req->group_list); | |
595 | list_del(&req->func_list); | |
596 | kfree(req); | |
597 | return 1; | |
598 | } | |
599 | ||
600 | static int handle_join_req(struct mcast_group *group, u8 join_mask, | |
601 | struct mcast_req *req) | |
602 | { | |
603 | u8 group_join_state = group->rec.scope_join_state & 7; | |
604 | int ref = 0; | |
605 | u16 status; | |
606 | struct ib_sa_mcmember_data *sa_data = (struct ib_sa_mcmember_data *)req->sa_mad.data; | |
607 | ||
608 | if (join_mask == (group_join_state & join_mask)) { | |
609 | /* port's membership need not change */ | |
610 | status = cmp_rec(&group->rec, sa_data, req->sa_mad.sa_hdr.comp_mask); | |
611 | if (!status) | |
612 | join_group(group, req->func, join_mask); | |
613 | ||
614 | --group->func[req->func].num_pend_reqs; | |
615 | send_reply_to_slave(req->func, group, &req->sa_mad, status); | |
616 | list_del(&req->group_list); | |
617 | list_del(&req->func_list); | |
618 | kfree(req); | |
619 | ++ref; | |
620 | } else { | |
621 | /* port's membership needs to be updated */ | |
622 | group->prev_state = group->state; | |
623 | if (send_join_to_wire(group, &req->sa_mad)) { | |
624 | --group->func[req->func].num_pend_reqs; | |
625 | list_del(&req->group_list); | |
626 | list_del(&req->func_list); | |
627 | kfree(req); | |
628 | ref = 1; | |
629 | group->state = group->prev_state; | |
630 | } else | |
631 | group->state = MCAST_JOIN_SENT; | |
632 | } | |
633 | ||
634 | return ref; | |
635 | } | |
636 | ||
637 | static void mlx4_ib_mcg_work_handler(struct work_struct *work) | |
638 | { | |
639 | struct mcast_group *group; | |
640 | struct mcast_req *req = NULL; | |
641 | struct ib_sa_mcmember_data *sa_data; | |
642 | u8 req_join_state; | |
643 | int rc = 1; /* release_count - this is for the scheduled work */ | |
644 | u16 status; | |
645 | u8 method; | |
646 | ||
647 | group = container_of(work, typeof(*group), work); | |
648 | ||
649 | mutex_lock(&group->lock); | |
650 | ||
651 | /* First, let's see if a response from SM is waiting regarding this group. | |
652 | * If so, we need to update the group's REC. If this is a bad response, we | |
653 | * may need to send a bad response to a VF waiting for it. If VF is waiting | |
654 | * and this is a good response, the VF will be answered later in this func. */ | |
655 | if (group->state == MCAST_RESP_READY) { | |
656 | /* cancels mlx4_ib_mcg_timeout_handler */ | |
657 | cancel_delayed_work(&group->timeout_work); | |
658 | status = be16_to_cpu(group->response_sa_mad.mad_hdr.status); | |
659 | method = group->response_sa_mad.mad_hdr.method; | |
660 | if (group->last_req_tid != group->response_sa_mad.mad_hdr.tid) { | |
661 | mcg_warn_group(group, "Got MAD response to existing MGID but wrong TID, dropping. Resp TID=%llx, group TID=%llx\n", | |
662 | be64_to_cpu(group->response_sa_mad.mad_hdr.tid), | |
663 | be64_to_cpu(group->last_req_tid)); | |
664 | group->state = group->prev_state; | |
665 | goto process_requests; | |
666 | } | |
667 | if (status) { | |
668 | if (!list_empty(&group->pending_list)) | |
669 | req = list_first_entry(&group->pending_list, | |
670 | struct mcast_req, group_list); | |
671 | if ((method == IB_MGMT_METHOD_GET_RESP)) { | |
672 | if (req) { | |
673 | send_reply_to_slave(req->func, group, &req->sa_mad, status); | |
674 | --group->func[req->func].num_pend_reqs; | |
675 | list_del(&req->group_list); | |
676 | list_del(&req->func_list); | |
677 | kfree(req); | |
678 | ++rc; | |
679 | } else | |
680 | mcg_warn_group(group, "no request for failed join\n"); | |
681 | } else if (method == IB_SA_METHOD_DELETE_RESP && group->demux->flushing) | |
682 | ++rc; | |
683 | } else { | |
684 | u8 resp_join_state; | |
685 | u8 cur_join_state; | |
686 | ||
687 | resp_join_state = ((struct ib_sa_mcmember_data *) | |
688 | group->response_sa_mad.data)->scope_join_state & 7; | |
689 | cur_join_state = group->rec.scope_join_state & 7; | |
690 | ||
691 | if (method == IB_MGMT_METHOD_GET_RESP) { | |
692 | /* successfull join */ | |
693 | if (!cur_join_state && resp_join_state) | |
694 | --rc; | |
695 | } else if (!resp_join_state) | |
696 | ++rc; | |
697 | memcpy(&group->rec, group->response_sa_mad.data, sizeof group->rec); | |
698 | } | |
699 | group->state = MCAST_IDLE; | |
700 | } | |
701 | ||
702 | process_requests: | |
703 | /* We should now go over pending join/leave requests, as long as we are idle. */ | |
704 | while (!list_empty(&group->pending_list) && group->state == MCAST_IDLE) { | |
705 | req = list_first_entry(&group->pending_list, struct mcast_req, | |
706 | group_list); | |
707 | sa_data = (struct ib_sa_mcmember_data *)req->sa_mad.data; | |
708 | req_join_state = sa_data->scope_join_state & 0x7; | |
709 | ||
710 | /* For a leave request, we will immediately answer the VF, and | |
711 | * update our internal counters. The actual leave will be sent | |
712 | * to SM later, if at all needed. We dequeue the request now. */ | |
713 | if (req->sa_mad.mad_hdr.method == IB_SA_METHOD_DELETE) | |
714 | rc += handle_leave_req(group, req_join_state, req); | |
715 | else | |
716 | rc += handle_join_req(group, req_join_state, req); | |
717 | } | |
718 | ||
719 | /* Handle leaves */ | |
720 | if (group->state == MCAST_IDLE) { | |
721 | req_join_state = get_leave_state(group); | |
722 | if (req_join_state) { | |
723 | group->rec.scope_join_state &= ~req_join_state; | |
724 | group->prev_state = group->state; | |
725 | if (send_leave_to_wire(group, req_join_state)) { | |
726 | group->state = group->prev_state; | |
727 | ++rc; | |
728 | } else | |
729 | group->state = MCAST_LEAVE_SENT; | |
730 | } | |
731 | } | |
732 | ||
733 | if (!list_empty(&group->pending_list) && group->state == MCAST_IDLE) | |
734 | goto process_requests; | |
735 | mutex_unlock(&group->lock); | |
736 | ||
737 | while (rc--) | |
738 | release_group(group, 0); | |
739 | } | |
740 | ||
741 | static struct mcast_group *search_relocate_mgid0_group(struct mlx4_ib_demux_ctx *ctx, | |
742 | __be64 tid, | |
743 | union ib_gid *new_mgid) | |
744 | { | |
745 | struct mcast_group *group = NULL, *cur_group; | |
746 | struct mcast_req *req; | |
747 | struct list_head *pos; | |
748 | struct list_head *n; | |
749 | ||
750 | mutex_lock(&ctx->mcg_table_lock); | |
751 | list_for_each_safe(pos, n, &ctx->mcg_mgid0_list) { | |
752 | group = list_entry(pos, struct mcast_group, mgid0_list); | |
753 | mutex_lock(&group->lock); | |
754 | if (group->last_req_tid == tid) { | |
755 | if (memcmp(new_mgid, &mgid0, sizeof mgid0)) { | |
756 | group->rec.mgid = *new_mgid; | |
757 | sprintf(group->name, "%016llx%016llx", | |
758 | be64_to_cpu(group->rec.mgid.global.subnet_prefix), | |
759 | be64_to_cpu(group->rec.mgid.global.interface_id)); | |
760 | list_del_init(&group->mgid0_list); | |
761 | cur_group = mcast_insert(ctx, group); | |
762 | if (cur_group) { | |
763 | /* A race between our code and SM. Silently cleaning the new one */ | |
764 | req = list_first_entry(&group->pending_list, | |
765 | struct mcast_req, group_list); | |
766 | --group->func[req->func].num_pend_reqs; | |
767 | list_del(&req->group_list); | |
768 | list_del(&req->func_list); | |
769 | kfree(req); | |
770 | mutex_unlock(&group->lock); | |
771 | mutex_unlock(&ctx->mcg_table_lock); | |
772 | release_group(group, 0); | |
773 | return NULL; | |
774 | } | |
775 | ||
776 | atomic_inc(&group->refcount); | |
c1e7e466 | 777 | add_sysfs_port_mcg_attr(ctx->dev, ctx->port, &group->dentry.attr); |
b9c5d6a6 OD |
778 | mutex_unlock(&group->lock); |
779 | mutex_unlock(&ctx->mcg_table_lock); | |
780 | return group; | |
781 | } else { | |
782 | struct mcast_req *tmp1, *tmp2; | |
783 | ||
784 | list_del(&group->mgid0_list); | |
785 | if (!list_empty(&group->pending_list) && group->state != MCAST_IDLE) | |
786 | cancel_delayed_work_sync(&group->timeout_work); | |
787 | ||
788 | list_for_each_entry_safe(tmp1, tmp2, &group->pending_list, group_list) { | |
789 | list_del(&tmp1->group_list); | |
790 | kfree(tmp1); | |
791 | } | |
792 | mutex_unlock(&group->lock); | |
793 | mutex_unlock(&ctx->mcg_table_lock); | |
794 | kfree(group); | |
795 | return NULL; | |
796 | } | |
797 | } | |
798 | mutex_unlock(&group->lock); | |
799 | } | |
800 | mutex_unlock(&ctx->mcg_table_lock); | |
801 | ||
802 | return NULL; | |
803 | } | |
804 | ||
c1e7e466 JM |
805 | static ssize_t sysfs_show_group(struct device *dev, |
806 | struct device_attribute *attr, char *buf); | |
807 | ||
b9c5d6a6 OD |
808 | static struct mcast_group *acquire_group(struct mlx4_ib_demux_ctx *ctx, |
809 | union ib_gid *mgid, int create, | |
810 | gfp_t gfp_mask) | |
811 | { | |
812 | struct mcast_group *group, *cur_group; | |
813 | int is_mgid0; | |
814 | int i; | |
815 | ||
816 | is_mgid0 = !memcmp(&mgid0, mgid, sizeof mgid0); | |
817 | if (!is_mgid0) { | |
818 | group = mcast_find(ctx, mgid); | |
819 | if (group) | |
820 | goto found; | |
821 | } | |
822 | ||
823 | if (!create) | |
824 | return ERR_PTR(-ENOENT); | |
825 | ||
826 | group = kzalloc(sizeof *group, gfp_mask); | |
827 | if (!group) | |
828 | return ERR_PTR(-ENOMEM); | |
829 | ||
830 | group->demux = ctx; | |
831 | group->rec.mgid = *mgid; | |
832 | INIT_LIST_HEAD(&group->pending_list); | |
833 | INIT_LIST_HEAD(&group->mgid0_list); | |
834 | for (i = 0; i < MAX_VFS; ++i) | |
835 | INIT_LIST_HEAD(&group->func[i].pending); | |
836 | INIT_WORK(&group->work, mlx4_ib_mcg_work_handler); | |
837 | INIT_DELAYED_WORK(&group->timeout_work, mlx4_ib_mcg_timeout_handler); | |
838 | mutex_init(&group->lock); | |
839 | sprintf(group->name, "%016llx%016llx", | |
840 | be64_to_cpu(group->rec.mgid.global.subnet_prefix), | |
841 | be64_to_cpu(group->rec.mgid.global.interface_id)); | |
c1e7e466 JM |
842 | sysfs_attr_init(&group->dentry.attr); |
843 | group->dentry.show = sysfs_show_group; | |
844 | group->dentry.store = NULL; | |
845 | group->dentry.attr.name = group->name; | |
846 | group->dentry.attr.mode = 0400; | |
b9c5d6a6 OD |
847 | group->state = MCAST_IDLE; |
848 | ||
849 | if (is_mgid0) { | |
850 | list_add(&group->mgid0_list, &ctx->mcg_mgid0_list); | |
851 | goto found; | |
852 | } | |
853 | ||
854 | cur_group = mcast_insert(ctx, group); | |
855 | if (cur_group) { | |
856 | mcg_warn("group just showed up %s - confused\n", cur_group->name); | |
857 | kfree(group); | |
858 | return ERR_PTR(-EINVAL); | |
859 | } | |
860 | ||
c1e7e466 JM |
861 | add_sysfs_port_mcg_attr(ctx->dev, ctx->port, &group->dentry.attr); |
862 | ||
b9c5d6a6 OD |
863 | found: |
864 | atomic_inc(&group->refcount); | |
865 | return group; | |
866 | } | |
867 | ||
868 | static void queue_req(struct mcast_req *req) | |
869 | { | |
870 | struct mcast_group *group = req->group; | |
871 | ||
872 | atomic_inc(&group->refcount); /* for the request */ | |
873 | atomic_inc(&group->refcount); /* for scheduling the work */ | |
874 | list_add_tail(&req->group_list, &group->pending_list); | |
875 | list_add_tail(&req->func_list, &group->func[req->func].pending); | |
876 | /* calls mlx4_ib_mcg_work_handler */ | |
877 | if (!queue_work(group->demux->mcg_wq, &group->work)) | |
878 | safe_atomic_dec(&group->refcount); | |
879 | } | |
880 | ||
881 | int mlx4_ib_mcg_demux_handler(struct ib_device *ibdev, int port, int slave, | |
882 | struct ib_sa_mad *mad) | |
883 | { | |
884 | struct mlx4_ib_dev *dev = to_mdev(ibdev); | |
885 | struct ib_sa_mcmember_data *rec = (struct ib_sa_mcmember_data *)mad->data; | |
886 | struct mlx4_ib_demux_ctx *ctx = &dev->sriov.demux[port - 1]; | |
887 | struct mcast_group *group; | |
888 | ||
889 | switch (mad->mad_hdr.method) { | |
890 | case IB_MGMT_METHOD_GET_RESP: | |
891 | case IB_SA_METHOD_DELETE_RESP: | |
892 | mutex_lock(&ctx->mcg_table_lock); | |
893 | group = acquire_group(ctx, &rec->mgid, 0, GFP_KERNEL); | |
894 | mutex_unlock(&ctx->mcg_table_lock); | |
895 | if (IS_ERR(group)) { | |
896 | if (mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP) { | |
897 | __be64 tid = mad->mad_hdr.tid; | |
898 | *(u8 *)(&tid) = (u8)slave; /* in group we kept the modified TID */ | |
899 | group = search_relocate_mgid0_group(ctx, tid, &rec->mgid); | |
900 | } else | |
901 | group = NULL; | |
902 | } | |
903 | ||
904 | if (!group) | |
905 | return 1; | |
906 | ||
907 | mutex_lock(&group->lock); | |
908 | group->response_sa_mad = *mad; | |
909 | group->prev_state = group->state; | |
910 | group->state = MCAST_RESP_READY; | |
911 | /* calls mlx4_ib_mcg_work_handler */ | |
912 | atomic_inc(&group->refcount); | |
913 | if (!queue_work(ctx->mcg_wq, &group->work)) | |
914 | safe_atomic_dec(&group->refcount); | |
915 | mutex_unlock(&group->lock); | |
916 | release_group(group, 0); | |
917 | return 1; /* consumed */ | |
918 | case IB_MGMT_METHOD_SET: | |
919 | case IB_SA_METHOD_GET_TABLE: | |
920 | case IB_SA_METHOD_GET_TABLE_RESP: | |
921 | case IB_SA_METHOD_DELETE: | |
922 | return 0; /* not consumed, pass-through to guest over tunnel */ | |
923 | default: | |
924 | mcg_warn("In demux, port %d: unexpected MCMember method: 0x%x, dropping\n", | |
925 | port, mad->mad_hdr.method); | |
926 | return 1; /* consumed */ | |
927 | } | |
928 | } | |
929 | ||
930 | int mlx4_ib_mcg_multiplex_handler(struct ib_device *ibdev, int port, | |
931 | int slave, struct ib_sa_mad *sa_mad) | |
932 | { | |
933 | struct mlx4_ib_dev *dev = to_mdev(ibdev); | |
934 | struct ib_sa_mcmember_data *rec = (struct ib_sa_mcmember_data *)sa_mad->data; | |
935 | struct mlx4_ib_demux_ctx *ctx = &dev->sriov.demux[port - 1]; | |
936 | struct mcast_group *group; | |
937 | struct mcast_req *req; | |
938 | int may_create = 0; | |
939 | ||
940 | if (ctx->flushing) | |
941 | return -EAGAIN; | |
942 | ||
943 | switch (sa_mad->mad_hdr.method) { | |
944 | case IB_MGMT_METHOD_SET: | |
945 | may_create = 1; | |
946 | case IB_SA_METHOD_DELETE: | |
947 | req = kzalloc(sizeof *req, GFP_KERNEL); | |
948 | if (!req) | |
949 | return -ENOMEM; | |
950 | ||
951 | req->func = slave; | |
952 | req->sa_mad = *sa_mad; | |
953 | ||
954 | mutex_lock(&ctx->mcg_table_lock); | |
955 | group = acquire_group(ctx, &rec->mgid, may_create, GFP_KERNEL); | |
956 | mutex_unlock(&ctx->mcg_table_lock); | |
957 | if (IS_ERR(group)) { | |
958 | kfree(req); | |
959 | return PTR_ERR(group); | |
960 | } | |
961 | mutex_lock(&group->lock); | |
962 | if (group->func[slave].num_pend_reqs > MAX_PEND_REQS_PER_FUNC) { | |
963 | mutex_unlock(&group->lock); | |
964 | mcg_warn_group(group, "Port %d, Func %d has too many pending requests (%d), dropping\n", | |
965 | port, slave, MAX_PEND_REQS_PER_FUNC); | |
966 | release_group(group, 0); | |
967 | kfree(req); | |
968 | return -ENOMEM; | |
969 | } | |
970 | ++group->func[slave].num_pend_reqs; | |
971 | req->group = group; | |
972 | queue_req(req); | |
973 | mutex_unlock(&group->lock); | |
974 | release_group(group, 0); | |
975 | return 1; /* consumed */ | |
976 | case IB_SA_METHOD_GET_TABLE: | |
977 | case IB_MGMT_METHOD_GET_RESP: | |
978 | case IB_SA_METHOD_GET_TABLE_RESP: | |
979 | case IB_SA_METHOD_DELETE_RESP: | |
980 | return 0; /* not consumed, pass-through */ | |
981 | default: | |
982 | mcg_warn("In multiplex, port %d, func %d: unexpected MCMember method: 0x%x, dropping\n", | |
983 | port, slave, sa_mad->mad_hdr.method); | |
984 | return 1; /* consumed */ | |
985 | } | |
986 | } | |
987 | ||
c1e7e466 JM |
988 | static ssize_t sysfs_show_group(struct device *dev, |
989 | struct device_attribute *attr, char *buf) | |
990 | { | |
991 | struct mcast_group *group = | |
992 | container_of(attr, struct mcast_group, dentry); | |
993 | struct mcast_req *req = NULL; | |
994 | char pending_str[40]; | |
995 | char state_str[40]; | |
996 | ssize_t len = 0; | |
997 | int f; | |
998 | ||
999 | if (group->state == MCAST_IDLE) | |
1000 | sprintf(state_str, "%s", get_state_string(group->state)); | |
1001 | else | |
1002 | sprintf(state_str, "%s(TID=0x%llx)", | |
1003 | get_state_string(group->state), | |
1004 | be64_to_cpu(group->last_req_tid)); | |
1005 | if (list_empty(&group->pending_list)) { | |
1006 | sprintf(pending_str, "No"); | |
1007 | } else { | |
1008 | req = list_first_entry(&group->pending_list, struct mcast_req, group_list); | |
1009 | sprintf(pending_str, "Yes(TID=0x%llx)", | |
1010 | be64_to_cpu(req->sa_mad.mad_hdr.tid)); | |
1011 | } | |
1012 | len += sprintf(buf + len, "%1d [%02d,%02d,%02d] %4d %4s %5s ", | |
1013 | group->rec.scope_join_state & 0xf, | |
1014 | group->members[2], group->members[1], group->members[0], | |
1015 | atomic_read(&group->refcount), | |
1016 | pending_str, | |
1017 | state_str); | |
1018 | for (f = 0; f < MAX_VFS; ++f) | |
1019 | if (group->func[f].state == MCAST_MEMBER) | |
1020 | len += sprintf(buf + len, "%d[%1x] ", | |
1021 | f, group->func[f].join_state); | |
1022 | ||
1023 | len += sprintf(buf + len, "\t\t(%4hx %4x %2x %2x %2x %2x %2x " | |
1024 | "%4x %4x %2x %2x)\n", | |
1025 | be16_to_cpu(group->rec.pkey), | |
1026 | be32_to_cpu(group->rec.qkey), | |
1027 | (group->rec.mtusel_mtu & 0xc0) >> 6, | |
1028 | group->rec.mtusel_mtu & 0x3f, | |
1029 | group->rec.tclass, | |
1030 | (group->rec.ratesel_rate & 0xc0) >> 6, | |
1031 | group->rec.ratesel_rate & 0x3f, | |
1032 | (be32_to_cpu(group->rec.sl_flowlabel_hoplimit) & 0xf0000000) >> 28, | |
1033 | (be32_to_cpu(group->rec.sl_flowlabel_hoplimit) & 0x0fffff00) >> 8, | |
1034 | be32_to_cpu(group->rec.sl_flowlabel_hoplimit) & 0x000000ff, | |
1035 | group->rec.proxy_join); | |
1036 | ||
1037 | return len; | |
1038 | } | |
1039 | ||
b9c5d6a6 OD |
1040 | int mlx4_ib_mcg_port_init(struct mlx4_ib_demux_ctx *ctx) |
1041 | { | |
1042 | char name[20]; | |
1043 | ||
1044 | atomic_set(&ctx->tid, 0); | |
1045 | sprintf(name, "mlx4_ib_mcg%d", ctx->port); | |
1046 | ctx->mcg_wq = create_singlethread_workqueue(name); | |
1047 | if (!ctx->mcg_wq) | |
1048 | return -ENOMEM; | |
1049 | ||
1050 | mutex_init(&ctx->mcg_table_lock); | |
1051 | ctx->mcg_table = RB_ROOT; | |
1052 | INIT_LIST_HEAD(&ctx->mcg_mgid0_list); | |
1053 | ctx->flushing = 0; | |
1054 | ||
1055 | return 0; | |
1056 | } | |
1057 | ||
1058 | static void force_clean_group(struct mcast_group *group) | |
1059 | { | |
1060 | struct mcast_req *req, *tmp | |
1061 | ; | |
1062 | list_for_each_entry_safe(req, tmp, &group->pending_list, group_list) { | |
1063 | list_del(&req->group_list); | |
1064 | kfree(req); | |
1065 | } | |
c1e7e466 | 1066 | del_sysfs_port_mcg_attr(group->demux->dev, group->demux->port, &group->dentry.attr); |
b9c5d6a6 OD |
1067 | rb_erase(&group->node, &group->demux->mcg_table); |
1068 | kfree(group); | |
1069 | } | |
1070 | ||
1071 | static void _mlx4_ib_mcg_port_cleanup(struct mlx4_ib_demux_ctx *ctx, int destroy_wq) | |
1072 | { | |
1073 | int i; | |
1074 | struct rb_node *p; | |
1075 | struct mcast_group *group; | |
1076 | unsigned long end; | |
1077 | int count; | |
1078 | ||
b9c5d6a6 OD |
1079 | for (i = 0; i < MAX_VFS; ++i) |
1080 | clean_vf_mcast(ctx, i); | |
1081 | ||
1082 | end = jiffies + msecs_to_jiffies(MAD_TIMEOUT_MS + 3000); | |
1083 | do { | |
1084 | count = 0; | |
1085 | mutex_lock(&ctx->mcg_table_lock); | |
1086 | for (p = rb_first(&ctx->mcg_table); p; p = rb_next(p)) | |
1087 | ++count; | |
1088 | mutex_unlock(&ctx->mcg_table_lock); | |
1089 | if (!count) | |
1090 | break; | |
1091 | ||
1092 | msleep(1); | |
1093 | } while (time_after(end, jiffies)); | |
1094 | ||
1095 | flush_workqueue(ctx->mcg_wq); | |
1096 | if (destroy_wq) | |
1097 | destroy_workqueue(ctx->mcg_wq); | |
1098 | ||
1099 | mutex_lock(&ctx->mcg_table_lock); | |
1100 | while ((p = rb_first(&ctx->mcg_table)) != NULL) { | |
1101 | group = rb_entry(p, struct mcast_group, node); | |
1102 | if (atomic_read(&group->refcount)) | |
1103 | mcg_warn_group(group, "group refcount %d!!! (pointer %p)\n", atomic_read(&group->refcount), group); | |
1104 | ||
1105 | force_clean_group(group); | |
1106 | } | |
1107 | mutex_unlock(&ctx->mcg_table_lock); | |
b9c5d6a6 OD |
1108 | } |
1109 | ||
1110 | struct clean_work { | |
1111 | struct work_struct work; | |
1112 | struct mlx4_ib_demux_ctx *ctx; | |
1113 | int destroy_wq; | |
1114 | }; | |
1115 | ||
1116 | static void mcg_clean_task(struct work_struct *work) | |
1117 | { | |
1118 | struct clean_work *cw = container_of(work, struct clean_work, work); | |
1119 | ||
1120 | _mlx4_ib_mcg_port_cleanup(cw->ctx, cw->destroy_wq); | |
bef83ed9 | 1121 | cw->ctx->flushing = 0; |
b9c5d6a6 OD |
1122 | kfree(cw); |
1123 | } | |
1124 | ||
1125 | void mlx4_ib_mcg_port_cleanup(struct mlx4_ib_demux_ctx *ctx, int destroy_wq) | |
1126 | { | |
1127 | struct clean_work *work; | |
1128 | ||
bef83ed9 EC |
1129 | if (ctx->flushing) |
1130 | return; | |
1131 | ||
1132 | ctx->flushing = 1; | |
1133 | ||
b9c5d6a6 OD |
1134 | if (destroy_wq) { |
1135 | _mlx4_ib_mcg_port_cleanup(ctx, destroy_wq); | |
bef83ed9 | 1136 | ctx->flushing = 0; |
b9c5d6a6 OD |
1137 | return; |
1138 | } | |
1139 | ||
1140 | work = kmalloc(sizeof *work, GFP_KERNEL); | |
1141 | if (!work) { | |
bef83ed9 | 1142 | ctx->flushing = 0; |
b9c5d6a6 OD |
1143 | mcg_warn("failed allocating work for cleanup\n"); |
1144 | return; | |
1145 | } | |
1146 | ||
1147 | work->ctx = ctx; | |
1148 | work->destroy_wq = destroy_wq; | |
1149 | INIT_WORK(&work->work, mcg_clean_task); | |
1150 | queue_work(clean_wq, &work->work); | |
1151 | } | |
1152 | ||
1153 | static void build_leave_mad(struct mcast_req *req) | |
1154 | { | |
1155 | struct ib_sa_mad *mad = &req->sa_mad; | |
1156 | ||
1157 | mad->mad_hdr.method = IB_SA_METHOD_DELETE; | |
1158 | } | |
1159 | ||
1160 | ||
1161 | static void clear_pending_reqs(struct mcast_group *group, int vf) | |
1162 | { | |
1163 | struct mcast_req *req, *tmp, *group_first = NULL; | |
1164 | int clear; | |
1165 | int pend = 0; | |
1166 | ||
1167 | if (!list_empty(&group->pending_list)) | |
1168 | group_first = list_first_entry(&group->pending_list, struct mcast_req, group_list); | |
1169 | ||
1170 | list_for_each_entry_safe(req, tmp, &group->func[vf].pending, func_list) { | |
1171 | clear = 1; | |
1172 | if (group_first == req && | |
1173 | (group->state == MCAST_JOIN_SENT || | |
1174 | group->state == MCAST_LEAVE_SENT)) { | |
1175 | clear = cancel_delayed_work(&group->timeout_work); | |
1176 | pend = !clear; | |
1177 | group->state = MCAST_IDLE; | |
1178 | } | |
1179 | if (clear) { | |
1180 | --group->func[vf].num_pend_reqs; | |
1181 | list_del(&req->group_list); | |
1182 | list_del(&req->func_list); | |
1183 | kfree(req); | |
1184 | atomic_dec(&group->refcount); | |
1185 | } | |
1186 | } | |
1187 | ||
1188 | if (!pend && (!list_empty(&group->func[vf].pending) || group->func[vf].num_pend_reqs)) { | |
1189 | mcg_warn_group(group, "DRIVER BUG: list_empty %d, num_pend_reqs %d\n", | |
1190 | list_empty(&group->func[vf].pending), group->func[vf].num_pend_reqs); | |
1191 | } | |
1192 | } | |
1193 | ||
1194 | static int push_deleteing_req(struct mcast_group *group, int slave) | |
1195 | { | |
1196 | struct mcast_req *req; | |
1197 | struct mcast_req *pend_req; | |
1198 | ||
1199 | if (!group->func[slave].join_state) | |
1200 | return 0; | |
1201 | ||
1202 | req = kzalloc(sizeof *req, GFP_KERNEL); | |
1203 | if (!req) { | |
1204 | mcg_warn_group(group, "failed allocation - may leave stall groups\n"); | |
1205 | return -ENOMEM; | |
1206 | } | |
1207 | ||
1208 | if (!list_empty(&group->func[slave].pending)) { | |
1209 | pend_req = list_entry(group->func[slave].pending.prev, struct mcast_req, group_list); | |
1210 | if (pend_req->clean) { | |
1211 | kfree(req); | |
1212 | return 0; | |
1213 | } | |
1214 | } | |
1215 | ||
1216 | req->clean = 1; | |
1217 | req->func = slave; | |
1218 | req->group = group; | |
1219 | ++group->func[slave].num_pend_reqs; | |
1220 | build_leave_mad(req); | |
1221 | queue_req(req); | |
1222 | return 0; | |
1223 | } | |
1224 | ||
1225 | void clean_vf_mcast(struct mlx4_ib_demux_ctx *ctx, int slave) | |
1226 | { | |
1227 | struct mcast_group *group; | |
1228 | struct rb_node *p; | |
1229 | ||
1230 | mutex_lock(&ctx->mcg_table_lock); | |
1231 | for (p = rb_first(&ctx->mcg_table); p; p = rb_next(p)) { | |
1232 | group = rb_entry(p, struct mcast_group, node); | |
1233 | mutex_lock(&group->lock); | |
1234 | if (atomic_read(&group->refcount)) { | |
1235 | /* clear pending requests of this VF */ | |
1236 | clear_pending_reqs(group, slave); | |
1237 | push_deleteing_req(group, slave); | |
1238 | } | |
1239 | mutex_unlock(&group->lock); | |
1240 | } | |
1241 | mutex_unlock(&ctx->mcg_table_lock); | |
1242 | } | |
1243 | ||
1244 | ||
1245 | int mlx4_ib_mcg_init(void) | |
1246 | { | |
1247 | clean_wq = create_singlethread_workqueue("mlx4_ib_mcg"); | |
1248 | if (!clean_wq) | |
1249 | return -ENOMEM; | |
1250 | ||
1251 | return 0; | |
1252 | } | |
1253 | ||
1254 | void mlx4_ib_mcg_destroy(void) | |
1255 | { | |
1256 | destroy_workqueue(clean_wq); | |
1257 | } |