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225c7b1f RD |
1 | /* |
2 | * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved. | |
51a379d0 | 3 | * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved. |
225c7b1f RD |
4 | * |
5 | * This software is available to you under a choice of one of two | |
6 | * licenses. You may choose to be licensed under the terms of the GNU | |
7 | * General Public License (GPL) Version 2, available from the file | |
8 | * COPYING in the main directory of this source tree, or the | |
9 | * OpenIB.org BSD license below: | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or | |
12 | * without modification, are permitted provided that the following | |
13 | * conditions are met: | |
14 | * | |
15 | * - Redistributions of source code must retain the above | |
16 | * copyright notice, this list of conditions and the following | |
17 | * disclaimer. | |
18 | * | |
19 | * - Redistributions in binary form must reproduce the above | |
20 | * copyright notice, this list of conditions and the following | |
21 | * disclaimer in the documentation and/or other materials | |
22 | * provided with the distribution. | |
23 | * | |
24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
31 | * SOFTWARE. | |
32 | */ | |
33 | ||
225c7b1f | 34 | #include <linux/string.h> |
0345584e | 35 | #include <linux/etherdevice.h> |
225c7b1f RD |
36 | |
37 | #include <linux/mlx4/cmd.h> | |
38 | ||
39 | #include "mlx4.h" | |
40 | ||
521e575b RL |
41 | #define MGM_QPN_MASK 0x00FFFFFF |
42 | #define MGM_BLCK_LB_BIT 30 | |
43 | ||
225c7b1f RD |
44 | static const u8 zero_gid[16]; /* automatically initialized to 0 */ |
45 | ||
0345584e YP |
46 | static int mlx4_READ_ENTRY(struct mlx4_dev *dev, int index, |
47 | struct mlx4_cmd_mailbox *mailbox) | |
225c7b1f RD |
48 | { |
49 | return mlx4_cmd_box(dev, 0, mailbox->dma, index, 0, MLX4_CMD_READ_MCG, | |
50 | MLX4_CMD_TIME_CLASS_A); | |
51 | } | |
52 | ||
0345584e YP |
53 | static int mlx4_WRITE_ENTRY(struct mlx4_dev *dev, int index, |
54 | struct mlx4_cmd_mailbox *mailbox) | |
225c7b1f RD |
55 | { |
56 | return mlx4_cmd(dev, mailbox->dma, index, 0, MLX4_CMD_WRITE_MCG, | |
57 | MLX4_CMD_TIME_CLASS_A); | |
58 | } | |
59 | ||
b12d93d6 YP |
60 | static int mlx4_WRITE_PROMISC(struct mlx4_dev *dev, u8 vep_num, u8 port, u8 steer, |
61 | struct mlx4_cmd_mailbox *mailbox) | |
62 | { | |
63 | u32 in_mod; | |
64 | ||
65 | in_mod = (u32) vep_num << 24 | (u32) port << 16 | steer << 1; | |
66 | return mlx4_cmd(dev, mailbox->dma, in_mod, 0x1, | |
67 | MLX4_CMD_WRITE_MCG, MLX4_CMD_TIME_CLASS_A); | |
68 | } | |
69 | ||
0345584e YP |
70 | static int mlx4_GID_HASH(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox, |
71 | u16 *hash, u8 op_mod) | |
225c7b1f RD |
72 | { |
73 | u64 imm; | |
74 | int err; | |
75 | ||
0345584e YP |
76 | err = mlx4_cmd_imm(dev, mailbox->dma, &imm, 0, op_mod, |
77 | MLX4_CMD_MGID_HASH, MLX4_CMD_TIME_CLASS_A); | |
225c7b1f RD |
78 | |
79 | if (!err) | |
80 | *hash = imm; | |
81 | ||
82 | return err; | |
83 | } | |
84 | ||
b12d93d6 YP |
85 | static struct mlx4_promisc_qp *get_promisc_qp(struct mlx4_dev *dev, u8 pf_num, |
86 | enum mlx4_steer_type steer, | |
87 | u32 qpn) | |
88 | { | |
89 | struct mlx4_steer *s_steer = &mlx4_priv(dev)->steer[pf_num]; | |
90 | struct mlx4_promisc_qp *pqp; | |
91 | ||
92 | list_for_each_entry(pqp, &s_steer->promisc_qps[steer], list) { | |
93 | if (pqp->qpn == qpn) | |
94 | return pqp; | |
95 | } | |
96 | /* not found */ | |
97 | return NULL; | |
98 | } | |
99 | ||
100 | /* | |
101 | * Add new entry to steering data structure. | |
102 | * All promisc QPs should be added as well | |
103 | */ | |
104 | static int new_steering_entry(struct mlx4_dev *dev, u8 vep_num, u8 port, | |
105 | enum mlx4_steer_type steer, | |
106 | unsigned int index, u32 qpn) | |
107 | { | |
108 | struct mlx4_steer *s_steer; | |
109 | struct mlx4_cmd_mailbox *mailbox; | |
110 | struct mlx4_mgm *mgm; | |
111 | u32 members_count; | |
112 | struct mlx4_steer_index *new_entry; | |
113 | struct mlx4_promisc_qp *pqp; | |
a14b289d | 114 | struct mlx4_promisc_qp *dqp = NULL; |
b12d93d6 YP |
115 | u32 prot; |
116 | int err; | |
117 | u8 pf_num; | |
118 | ||
119 | pf_num = (dev->caps.num_ports == 1) ? vep_num : (vep_num << 1) | (port - 1); | |
120 | s_steer = &mlx4_priv(dev)->steer[pf_num]; | |
121 | new_entry = kzalloc(sizeof *new_entry, GFP_KERNEL); | |
122 | if (!new_entry) | |
123 | return -ENOMEM; | |
124 | ||
125 | INIT_LIST_HEAD(&new_entry->duplicates); | |
126 | new_entry->index = index; | |
127 | list_add_tail(&new_entry->list, &s_steer->steer_entries[steer]); | |
128 | ||
129 | /* If the given qpn is also a promisc qp, | |
130 | * it should be inserted to duplicates list | |
131 | */ | |
132 | pqp = get_promisc_qp(dev, pf_num, steer, qpn); | |
133 | if (pqp) { | |
134 | dqp = kmalloc(sizeof *dqp, GFP_KERNEL); | |
135 | if (!dqp) { | |
136 | err = -ENOMEM; | |
137 | goto out_alloc; | |
138 | } | |
139 | dqp->qpn = qpn; | |
140 | list_add_tail(&dqp->list, &new_entry->duplicates); | |
141 | } | |
142 | ||
143 | /* if no promisc qps for this vep, we are done */ | |
144 | if (list_empty(&s_steer->promisc_qps[steer])) | |
145 | return 0; | |
146 | ||
147 | /* now need to add all the promisc qps to the new | |
148 | * steering entry, as they should also receive the packets | |
149 | * destined to this address */ | |
150 | mailbox = mlx4_alloc_cmd_mailbox(dev); | |
151 | if (IS_ERR(mailbox)) { | |
152 | err = -ENOMEM; | |
153 | goto out_alloc; | |
154 | } | |
155 | mgm = mailbox->buf; | |
156 | ||
157 | err = mlx4_READ_ENTRY(dev, index, mailbox); | |
158 | if (err) | |
159 | goto out_mailbox; | |
160 | ||
161 | members_count = be32_to_cpu(mgm->members_count) & 0xffffff; | |
162 | prot = be32_to_cpu(mgm->members_count) >> 30; | |
163 | list_for_each_entry(pqp, &s_steer->promisc_qps[steer], list) { | |
164 | /* don't add already existing qpn */ | |
165 | if (pqp->qpn == qpn) | |
166 | continue; | |
167 | if (members_count == MLX4_QP_PER_MGM) { | |
168 | /* out of space */ | |
169 | err = -ENOMEM; | |
170 | goto out_mailbox; | |
171 | } | |
172 | ||
173 | /* add the qpn */ | |
174 | mgm->qp[members_count++] = cpu_to_be32(pqp->qpn & MGM_QPN_MASK); | |
175 | } | |
176 | /* update the qps count and update the entry with all the promisc qps*/ | |
177 | mgm->members_count = cpu_to_be32(members_count | (prot << 30)); | |
178 | err = mlx4_WRITE_ENTRY(dev, index, mailbox); | |
179 | ||
180 | out_mailbox: | |
181 | mlx4_free_cmd_mailbox(dev, mailbox); | |
182 | if (!err) | |
183 | return 0; | |
184 | out_alloc: | |
185 | if (dqp) { | |
186 | list_del(&dqp->list); | |
a14b289d | 187 | kfree(dqp); |
b12d93d6 YP |
188 | } |
189 | list_del(&new_entry->list); | |
190 | kfree(new_entry); | |
191 | return err; | |
192 | } | |
193 | ||
194 | /* update the data structures with existing steering entry */ | |
195 | static int existing_steering_entry(struct mlx4_dev *dev, u8 vep_num, u8 port, | |
196 | enum mlx4_steer_type steer, | |
197 | unsigned int index, u32 qpn) | |
198 | { | |
199 | struct mlx4_steer *s_steer; | |
200 | struct mlx4_steer_index *tmp_entry, *entry = NULL; | |
201 | struct mlx4_promisc_qp *pqp; | |
202 | struct mlx4_promisc_qp *dqp; | |
203 | u8 pf_num; | |
204 | ||
205 | pf_num = (dev->caps.num_ports == 1) ? vep_num : (vep_num << 1) | (port - 1); | |
206 | s_steer = &mlx4_priv(dev)->steer[pf_num]; | |
207 | ||
208 | pqp = get_promisc_qp(dev, pf_num, steer, qpn); | |
209 | if (!pqp) | |
210 | return 0; /* nothing to do */ | |
211 | ||
212 | list_for_each_entry(tmp_entry, &s_steer->steer_entries[steer], list) { | |
213 | if (tmp_entry->index == index) { | |
214 | entry = tmp_entry; | |
215 | break; | |
216 | } | |
217 | } | |
218 | if (unlikely(!entry)) { | |
219 | mlx4_warn(dev, "Steering entry at index %x is not registered\n", index); | |
220 | return -EINVAL; | |
221 | } | |
222 | ||
223 | /* the given qpn is listed as a promisc qpn | |
224 | * we need to add it as a duplicate to this entry | |
25985edc | 225 | * for future references */ |
b12d93d6 YP |
226 | list_for_each_entry(dqp, &entry->duplicates, list) { |
227 | if (qpn == dqp->qpn) | |
228 | return 0; /* qp is already duplicated */ | |
229 | } | |
230 | ||
231 | /* add the qp as a duplicate on this index */ | |
232 | dqp = kmalloc(sizeof *dqp, GFP_KERNEL); | |
233 | if (!dqp) | |
234 | return -ENOMEM; | |
235 | dqp->qpn = qpn; | |
236 | list_add_tail(&dqp->list, &entry->duplicates); | |
237 | ||
238 | return 0; | |
239 | } | |
240 | ||
241 | /* Check whether a qpn is a duplicate on steering entry | |
242 | * If so, it should not be removed from mgm */ | |
243 | static bool check_duplicate_entry(struct mlx4_dev *dev, u8 vep_num, u8 port, | |
244 | enum mlx4_steer_type steer, | |
245 | unsigned int index, u32 qpn) | |
246 | { | |
247 | struct mlx4_steer *s_steer; | |
248 | struct mlx4_steer_index *tmp_entry, *entry = NULL; | |
249 | struct mlx4_promisc_qp *dqp, *tmp_dqp; | |
250 | u8 pf_num; | |
251 | ||
252 | pf_num = (dev->caps.num_ports == 1) ? vep_num : (vep_num << 1) | (port - 1); | |
253 | s_steer = &mlx4_priv(dev)->steer[pf_num]; | |
254 | ||
255 | /* if qp is not promisc, it cannot be duplicated */ | |
256 | if (!get_promisc_qp(dev, pf_num, steer, qpn)) | |
257 | return false; | |
258 | ||
259 | /* The qp is promisc qp so it is a duplicate on this index | |
260 | * Find the index entry, and remove the duplicate */ | |
261 | list_for_each_entry(tmp_entry, &s_steer->steer_entries[steer], list) { | |
262 | if (tmp_entry->index == index) { | |
263 | entry = tmp_entry; | |
264 | break; | |
265 | } | |
266 | } | |
267 | if (unlikely(!entry)) { | |
268 | mlx4_warn(dev, "Steering entry for index %x is not registered\n", index); | |
269 | return false; | |
270 | } | |
271 | list_for_each_entry_safe(dqp, tmp_dqp, &entry->duplicates, list) { | |
272 | if (dqp->qpn == qpn) { | |
273 | list_del(&dqp->list); | |
274 | kfree(dqp); | |
275 | } | |
276 | } | |
277 | return true; | |
278 | } | |
279 | ||
280 | /* I a steering entry contains only promisc QPs, it can be removed. */ | |
281 | static bool can_remove_steering_entry(struct mlx4_dev *dev, u8 vep_num, u8 port, | |
282 | enum mlx4_steer_type steer, | |
283 | unsigned int index, u32 tqpn) | |
284 | { | |
285 | struct mlx4_steer *s_steer; | |
286 | struct mlx4_cmd_mailbox *mailbox; | |
287 | struct mlx4_mgm *mgm; | |
288 | struct mlx4_steer_index *entry = NULL, *tmp_entry; | |
289 | u32 qpn; | |
290 | u32 members_count; | |
291 | bool ret = false; | |
292 | int i; | |
293 | u8 pf_num; | |
294 | ||
295 | pf_num = (dev->caps.num_ports == 1) ? vep_num : (vep_num << 1) | (port - 1); | |
296 | s_steer = &mlx4_priv(dev)->steer[pf_num]; | |
297 | ||
298 | mailbox = mlx4_alloc_cmd_mailbox(dev); | |
299 | if (IS_ERR(mailbox)) | |
300 | return false; | |
301 | mgm = mailbox->buf; | |
302 | ||
303 | if (mlx4_READ_ENTRY(dev, index, mailbox)) | |
304 | goto out; | |
305 | members_count = be32_to_cpu(mgm->members_count) & 0xffffff; | |
306 | for (i = 0; i < members_count; i++) { | |
307 | qpn = be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK; | |
308 | if (!get_promisc_qp(dev, pf_num, steer, qpn) && qpn != tqpn) { | |
309 | /* the qp is not promisc, the entry can't be removed */ | |
310 | goto out; | |
311 | } | |
312 | } | |
313 | /* All the qps currently registered for this entry are promiscuous, | |
314 | * Checking for duplicates */ | |
315 | ret = true; | |
316 | list_for_each_entry_safe(entry, tmp_entry, &s_steer->steer_entries[steer], list) { | |
317 | if (entry->index == index) { | |
318 | if (list_empty(&entry->duplicates)) { | |
319 | list_del(&entry->list); | |
320 | kfree(entry); | |
321 | } else { | |
322 | /* This entry contains duplicates so it shouldn't be removed */ | |
323 | ret = false; | |
324 | goto out; | |
325 | } | |
326 | } | |
327 | } | |
328 | ||
329 | out: | |
330 | mlx4_free_cmd_mailbox(dev, mailbox); | |
331 | return ret; | |
332 | } | |
333 | ||
334 | static int add_promisc_qp(struct mlx4_dev *dev, u8 vep_num, u8 port, | |
335 | enum mlx4_steer_type steer, u32 qpn) | |
336 | { | |
337 | struct mlx4_steer *s_steer; | |
338 | struct mlx4_cmd_mailbox *mailbox; | |
339 | struct mlx4_mgm *mgm; | |
340 | struct mlx4_steer_index *entry; | |
341 | struct mlx4_promisc_qp *pqp; | |
342 | struct mlx4_promisc_qp *dqp; | |
343 | u32 members_count; | |
344 | u32 prot; | |
345 | int i; | |
346 | bool found; | |
347 | int last_index; | |
348 | int err; | |
349 | u8 pf_num; | |
350 | struct mlx4_priv *priv = mlx4_priv(dev); | |
351 | pf_num = (dev->caps.num_ports == 1) ? vep_num : (vep_num << 1) | (port - 1); | |
352 | s_steer = &mlx4_priv(dev)->steer[pf_num]; | |
353 | ||
354 | mutex_lock(&priv->mcg_table.mutex); | |
355 | ||
356 | if (get_promisc_qp(dev, pf_num, steer, qpn)) { | |
357 | err = 0; /* Noting to do, already exists */ | |
358 | goto out_mutex; | |
359 | } | |
360 | ||
361 | pqp = kmalloc(sizeof *pqp, GFP_KERNEL); | |
362 | if (!pqp) { | |
363 | err = -ENOMEM; | |
364 | goto out_mutex; | |
365 | } | |
366 | pqp->qpn = qpn; | |
367 | ||
368 | mailbox = mlx4_alloc_cmd_mailbox(dev); | |
369 | if (IS_ERR(mailbox)) { | |
370 | err = -ENOMEM; | |
371 | goto out_alloc; | |
372 | } | |
373 | mgm = mailbox->buf; | |
374 | ||
375 | /* the promisc qp needs to be added for each one of the steering | |
376 | * entries, if it already exists, needs to be added as a duplicate | |
377 | * for this entry */ | |
378 | list_for_each_entry(entry, &s_steer->steer_entries[steer], list) { | |
379 | err = mlx4_READ_ENTRY(dev, entry->index, mailbox); | |
380 | if (err) | |
381 | goto out_mailbox; | |
382 | ||
383 | members_count = be32_to_cpu(mgm->members_count) & 0xffffff; | |
384 | prot = be32_to_cpu(mgm->members_count) >> 30; | |
385 | found = false; | |
386 | for (i = 0; i < members_count; i++) { | |
387 | if ((be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK) == qpn) { | |
388 | /* Entry already exists, add to duplicates */ | |
389 | dqp = kmalloc(sizeof *dqp, GFP_KERNEL); | |
390 | if (!dqp) | |
391 | goto out_mailbox; | |
392 | dqp->qpn = qpn; | |
393 | list_add_tail(&dqp->list, &entry->duplicates); | |
394 | found = true; | |
395 | } | |
396 | } | |
397 | if (!found) { | |
398 | /* Need to add the qpn to mgm */ | |
399 | if (members_count == MLX4_QP_PER_MGM) { | |
400 | /* entry is full */ | |
401 | err = -ENOMEM; | |
402 | goto out_mailbox; | |
403 | } | |
404 | mgm->qp[members_count++] = cpu_to_be32(qpn & MGM_QPN_MASK); | |
405 | mgm->members_count = cpu_to_be32(members_count | (prot << 30)); | |
406 | err = mlx4_WRITE_ENTRY(dev, entry->index, mailbox); | |
407 | if (err) | |
408 | goto out_mailbox; | |
409 | } | |
410 | last_index = entry->index; | |
411 | } | |
412 | ||
413 | /* add the new qpn to list of promisc qps */ | |
414 | list_add_tail(&pqp->list, &s_steer->promisc_qps[steer]); | |
415 | /* now need to add all the promisc qps to default entry */ | |
416 | memset(mgm, 0, sizeof *mgm); | |
417 | members_count = 0; | |
418 | list_for_each_entry(dqp, &s_steer->promisc_qps[steer], list) | |
419 | mgm->qp[members_count++] = cpu_to_be32(dqp->qpn & MGM_QPN_MASK); | |
420 | mgm->members_count = cpu_to_be32(members_count | MLX4_PROT_ETH << 30); | |
421 | ||
422 | err = mlx4_WRITE_PROMISC(dev, vep_num, port, steer, mailbox); | |
423 | if (err) | |
424 | goto out_list; | |
425 | ||
426 | mlx4_free_cmd_mailbox(dev, mailbox); | |
427 | mutex_unlock(&priv->mcg_table.mutex); | |
428 | return 0; | |
429 | ||
430 | out_list: | |
431 | list_del(&pqp->list); | |
432 | out_mailbox: | |
433 | mlx4_free_cmd_mailbox(dev, mailbox); | |
434 | out_alloc: | |
435 | kfree(pqp); | |
436 | out_mutex: | |
437 | mutex_unlock(&priv->mcg_table.mutex); | |
438 | return err; | |
439 | } | |
440 | ||
441 | static int remove_promisc_qp(struct mlx4_dev *dev, u8 vep_num, u8 port, | |
442 | enum mlx4_steer_type steer, u32 qpn) | |
443 | { | |
444 | struct mlx4_priv *priv = mlx4_priv(dev); | |
445 | struct mlx4_steer *s_steer; | |
446 | struct mlx4_cmd_mailbox *mailbox; | |
447 | struct mlx4_mgm *mgm; | |
448 | struct mlx4_steer_index *entry; | |
449 | struct mlx4_promisc_qp *pqp; | |
450 | struct mlx4_promisc_qp *dqp; | |
451 | u32 members_count; | |
452 | bool found; | |
453 | bool back_to_list = false; | |
454 | int loc, i; | |
455 | int err; | |
456 | u8 pf_num; | |
457 | ||
458 | pf_num = (dev->caps.num_ports == 1) ? vep_num : (vep_num << 1) | (port - 1); | |
459 | s_steer = &mlx4_priv(dev)->steer[pf_num]; | |
460 | mutex_lock(&priv->mcg_table.mutex); | |
461 | ||
462 | pqp = get_promisc_qp(dev, pf_num, steer, qpn); | |
463 | if (unlikely(!pqp)) { | |
464 | mlx4_warn(dev, "QP %x is not promiscuous QP\n", qpn); | |
465 | /* nothing to do */ | |
466 | err = 0; | |
467 | goto out_mutex; | |
468 | } | |
469 | ||
470 | /*remove from list of promisc qps */ | |
471 | list_del(&pqp->list); | |
b12d93d6 YP |
472 | |
473 | /* set the default entry not to include the removed one */ | |
474 | mailbox = mlx4_alloc_cmd_mailbox(dev); | |
475 | if (IS_ERR(mailbox)) { | |
476 | err = -ENOMEM; | |
477 | back_to_list = true; | |
478 | goto out_list; | |
479 | } | |
480 | mgm = mailbox->buf; | |
481 | members_count = 0; | |
482 | list_for_each_entry(dqp, &s_steer->promisc_qps[steer], list) | |
483 | mgm->qp[members_count++] = cpu_to_be32(dqp->qpn & MGM_QPN_MASK); | |
484 | mgm->members_count = cpu_to_be32(members_count | MLX4_PROT_ETH << 30); | |
485 | ||
486 | err = mlx4_WRITE_PROMISC(dev, vep_num, port, steer, mailbox); | |
487 | if (err) | |
488 | goto out_mailbox; | |
489 | ||
490 | /* remove the qp from all the steering entries*/ | |
491 | list_for_each_entry(entry, &s_steer->steer_entries[steer], list) { | |
492 | found = false; | |
493 | list_for_each_entry(dqp, &entry->duplicates, list) { | |
494 | if (dqp->qpn == qpn) { | |
495 | found = true; | |
496 | break; | |
497 | } | |
498 | } | |
499 | if (found) { | |
500 | /* a duplicate, no need to change the mgm, | |
501 | * only update the duplicates list */ | |
502 | list_del(&dqp->list); | |
503 | kfree(dqp); | |
504 | } else { | |
505 | err = mlx4_READ_ENTRY(dev, entry->index, mailbox); | |
506 | if (err) | |
507 | goto out_mailbox; | |
508 | members_count = be32_to_cpu(mgm->members_count) & 0xffffff; | |
509 | for (loc = -1, i = 0; i < members_count; ++i) | |
510 | if ((be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK) == qpn) | |
511 | loc = i; | |
512 | ||
513 | mgm->members_count = cpu_to_be32(--members_count | | |
514 | (MLX4_PROT_ETH << 30)); | |
515 | mgm->qp[loc] = mgm->qp[i - 1]; | |
516 | mgm->qp[i - 1] = 0; | |
517 | ||
518 | err = mlx4_WRITE_ENTRY(dev, entry->index, mailbox); | |
519 | if (err) | |
520 | goto out_mailbox; | |
521 | } | |
522 | ||
523 | } | |
524 | ||
525 | out_mailbox: | |
526 | mlx4_free_cmd_mailbox(dev, mailbox); | |
527 | out_list: | |
528 | if (back_to_list) | |
529 | list_add_tail(&pqp->list, &s_steer->promisc_qps[steer]); | |
53020092 YP |
530 | else |
531 | kfree(pqp); | |
b12d93d6 YP |
532 | out_mutex: |
533 | mutex_unlock(&priv->mcg_table.mutex); | |
534 | return err; | |
535 | } | |
536 | ||
225c7b1f RD |
537 | /* |
538 | * Caller must hold MCG table semaphore. gid and mgm parameters must | |
539 | * be properly aligned for command interface. | |
540 | * | |
541 | * Returns 0 unless a firmware command error occurs. | |
542 | * | |
543 | * If GID is found in MGM or MGM is empty, *index = *hash, *prev = -1 | |
544 | * and *mgm holds MGM entry. | |
545 | * | |
546 | * if GID is found in AMGM, *index = index in AMGM, *prev = index of | |
547 | * previous entry in hash chain and *mgm holds AMGM entry. | |
548 | * | |
549 | * If no AMGM exists for given gid, *index = -1, *prev = index of last | |
550 | * entry in hash chain and *mgm holds end of hash chain. | |
551 | */ | |
0345584e YP |
552 | static int find_entry(struct mlx4_dev *dev, u8 port, |
553 | u8 *gid, enum mlx4_protocol prot, | |
554 | enum mlx4_steer_type steer, | |
555 | struct mlx4_cmd_mailbox *mgm_mailbox, | |
556 | u16 *hash, int *prev, int *index) | |
225c7b1f RD |
557 | { |
558 | struct mlx4_cmd_mailbox *mailbox; | |
559 | struct mlx4_mgm *mgm = mgm_mailbox->buf; | |
560 | u8 *mgid; | |
561 | int err; | |
0345584e | 562 | u8 op_mod = (prot == MLX4_PROT_ETH) ? !!(dev->caps.vep_mc_steering) : 0; |
225c7b1f RD |
563 | |
564 | mailbox = mlx4_alloc_cmd_mailbox(dev); | |
565 | if (IS_ERR(mailbox)) | |
566 | return -ENOMEM; | |
567 | mgid = mailbox->buf; | |
568 | ||
569 | memcpy(mgid, gid, 16); | |
570 | ||
0345584e | 571 | err = mlx4_GID_HASH(dev, mailbox, hash, op_mod); |
225c7b1f RD |
572 | mlx4_free_cmd_mailbox(dev, mailbox); |
573 | if (err) | |
574 | return err; | |
575 | ||
576 | if (0) | |
5b095d98 | 577 | mlx4_dbg(dev, "Hash for %pI6 is %04x\n", gid, *hash); |
225c7b1f RD |
578 | |
579 | *index = *hash; | |
580 | *prev = -1; | |
581 | ||
582 | do { | |
0345584e | 583 | err = mlx4_READ_ENTRY(dev, *index, mgm_mailbox); |
225c7b1f RD |
584 | if (err) |
585 | return err; | |
586 | ||
0345584e | 587 | if (!(be32_to_cpu(mgm->members_count) & 0xffffff)) { |
225c7b1f RD |
588 | if (*index != *hash) { |
589 | mlx4_err(dev, "Found zero MGID in AMGM.\n"); | |
590 | err = -EINVAL; | |
591 | } | |
592 | return err; | |
593 | } | |
594 | ||
da995a8a | 595 | if (!memcmp(mgm->gid, gid, 16) && |
0345584e | 596 | be32_to_cpu(mgm->members_count) >> 30 == prot) |
225c7b1f RD |
597 | return err; |
598 | ||
599 | *prev = *index; | |
600 | *index = be32_to_cpu(mgm->next_gid_index) >> 6; | |
601 | } while (*index); | |
602 | ||
603 | *index = -1; | |
604 | return err; | |
605 | } | |
606 | ||
0345584e YP |
607 | int mlx4_qp_attach_common(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16], |
608 | int block_mcast_loopback, enum mlx4_protocol prot, | |
609 | enum mlx4_steer_type steer) | |
225c7b1f RD |
610 | { |
611 | struct mlx4_priv *priv = mlx4_priv(dev); | |
612 | struct mlx4_cmd_mailbox *mailbox; | |
613 | struct mlx4_mgm *mgm; | |
614 | u32 members_count; | |
615 | u16 hash; | |
616 | int index, prev; | |
617 | int link = 0; | |
618 | int i; | |
619 | int err; | |
0345584e | 620 | u8 port = gid[5]; |
b12d93d6 | 621 | u8 new_entry = 0; |
225c7b1f RD |
622 | |
623 | mailbox = mlx4_alloc_cmd_mailbox(dev); | |
624 | if (IS_ERR(mailbox)) | |
625 | return PTR_ERR(mailbox); | |
626 | mgm = mailbox->buf; | |
627 | ||
628 | mutex_lock(&priv->mcg_table.mutex); | |
0345584e YP |
629 | err = find_entry(dev, port, gid, prot, steer, |
630 | mailbox, &hash, &prev, &index); | |
225c7b1f RD |
631 | if (err) |
632 | goto out; | |
633 | ||
634 | if (index != -1) { | |
b12d93d6 YP |
635 | if (!(be32_to_cpu(mgm->members_count) & 0xffffff)) { |
636 | new_entry = 1; | |
225c7b1f | 637 | memcpy(mgm->gid, gid, 16); |
b12d93d6 | 638 | } |
225c7b1f RD |
639 | } else { |
640 | link = 1; | |
641 | ||
642 | index = mlx4_bitmap_alloc(&priv->mcg_table.bitmap); | |
643 | if (index == -1) { | |
644 | mlx4_err(dev, "No AMGM entries left\n"); | |
645 | err = -ENOMEM; | |
646 | goto out; | |
647 | } | |
648 | index += dev->caps.num_mgms; | |
649 | ||
225c7b1f RD |
650 | memset(mgm, 0, sizeof *mgm); |
651 | memcpy(mgm->gid, gid, 16); | |
652 | } | |
653 | ||
da995a8a | 654 | members_count = be32_to_cpu(mgm->members_count) & 0xffffff; |
225c7b1f RD |
655 | if (members_count == MLX4_QP_PER_MGM) { |
656 | mlx4_err(dev, "MGM at index %x is full.\n", index); | |
657 | err = -ENOMEM; | |
658 | goto out; | |
659 | } | |
660 | ||
661 | for (i = 0; i < members_count; ++i) | |
521e575b | 662 | if ((be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK) == qp->qpn) { |
225c7b1f RD |
663 | mlx4_dbg(dev, "QP %06x already a member of MGM\n", qp->qpn); |
664 | err = 0; | |
665 | goto out; | |
666 | } | |
667 | ||
521e575b RL |
668 | if (block_mcast_loopback) |
669 | mgm->qp[members_count++] = cpu_to_be32((qp->qpn & MGM_QPN_MASK) | | |
e6a17622 | 670 | (1U << MGM_BLCK_LB_BIT)); |
521e575b RL |
671 | else |
672 | mgm->qp[members_count++] = cpu_to_be32(qp->qpn & MGM_QPN_MASK); | |
673 | ||
0345584e | 674 | mgm->members_count = cpu_to_be32(members_count | (u32) prot << 30); |
225c7b1f | 675 | |
0345584e | 676 | err = mlx4_WRITE_ENTRY(dev, index, mailbox); |
225c7b1f RD |
677 | if (err) |
678 | goto out; | |
679 | ||
680 | if (!link) | |
681 | goto out; | |
682 | ||
0345584e | 683 | err = mlx4_READ_ENTRY(dev, prev, mailbox); |
225c7b1f RD |
684 | if (err) |
685 | goto out; | |
686 | ||
687 | mgm->next_gid_index = cpu_to_be32(index << 6); | |
688 | ||
0345584e | 689 | err = mlx4_WRITE_ENTRY(dev, prev, mailbox); |
225c7b1f RD |
690 | if (err) |
691 | goto out; | |
692 | ||
693 | out: | |
b12d93d6 YP |
694 | if (prot == MLX4_PROT_ETH) { |
695 | /* manage the steering entry for promisc mode */ | |
696 | if (new_entry) | |
697 | new_steering_entry(dev, 0, port, steer, index, qp->qpn); | |
698 | else | |
699 | existing_steering_entry(dev, 0, port, steer, | |
700 | index, qp->qpn); | |
701 | } | |
225c7b1f RD |
702 | if (err && link && index != -1) { |
703 | if (index < dev->caps.num_mgms) | |
704 | mlx4_warn(dev, "Got AMGM index %d < %d", | |
705 | index, dev->caps.num_mgms); | |
706 | else | |
707 | mlx4_bitmap_free(&priv->mcg_table.bitmap, | |
708 | index - dev->caps.num_mgms); | |
709 | } | |
710 | mutex_unlock(&priv->mcg_table.mutex); | |
711 | ||
712 | mlx4_free_cmd_mailbox(dev, mailbox); | |
713 | return err; | |
714 | } | |
225c7b1f | 715 | |
0345584e YP |
716 | int mlx4_qp_detach_common(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16], |
717 | enum mlx4_protocol prot, enum mlx4_steer_type steer) | |
225c7b1f RD |
718 | { |
719 | struct mlx4_priv *priv = mlx4_priv(dev); | |
720 | struct mlx4_cmd_mailbox *mailbox; | |
721 | struct mlx4_mgm *mgm; | |
722 | u32 members_count; | |
723 | u16 hash; | |
724 | int prev, index; | |
725 | int i, loc; | |
726 | int err; | |
0345584e | 727 | u8 port = gid[5]; |
b12d93d6 | 728 | bool removed_entry = false; |
225c7b1f RD |
729 | |
730 | mailbox = mlx4_alloc_cmd_mailbox(dev); | |
731 | if (IS_ERR(mailbox)) | |
732 | return PTR_ERR(mailbox); | |
733 | mgm = mailbox->buf; | |
734 | ||
735 | mutex_lock(&priv->mcg_table.mutex); | |
736 | ||
0345584e YP |
737 | err = find_entry(dev, port, gid, prot, steer, |
738 | mailbox, &hash, &prev, &index); | |
225c7b1f RD |
739 | if (err) |
740 | goto out; | |
741 | ||
742 | if (index == -1) { | |
5b095d98 | 743 | mlx4_err(dev, "MGID %pI6 not found\n", gid); |
225c7b1f RD |
744 | err = -EINVAL; |
745 | goto out; | |
746 | } | |
747 | ||
b12d93d6 YP |
748 | /* if this pq is also a promisc qp, it shouldn't be removed */ |
749 | if (prot == MLX4_PROT_ETH && | |
750 | check_duplicate_entry(dev, 0, port, steer, index, qp->qpn)) | |
751 | goto out; | |
752 | ||
da995a8a | 753 | members_count = be32_to_cpu(mgm->members_count) & 0xffffff; |
225c7b1f | 754 | for (loc = -1, i = 0; i < members_count; ++i) |
521e575b | 755 | if ((be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK) == qp->qpn) |
225c7b1f RD |
756 | loc = i; |
757 | ||
758 | if (loc == -1) { | |
759 | mlx4_err(dev, "QP %06x not found in MGM\n", qp->qpn); | |
760 | err = -EINVAL; | |
761 | goto out; | |
762 | } | |
763 | ||
764 | ||
0345584e | 765 | mgm->members_count = cpu_to_be32(--members_count | (u32) prot << 30); |
225c7b1f RD |
766 | mgm->qp[loc] = mgm->qp[i - 1]; |
767 | mgm->qp[i - 1] = 0; | |
768 | ||
b12d93d6 YP |
769 | if (prot == MLX4_PROT_ETH) |
770 | removed_entry = can_remove_steering_entry(dev, 0, port, steer, index, qp->qpn); | |
771 | if (i != 1 && (prot != MLX4_PROT_ETH || !removed_entry)) { | |
0345584e | 772 | err = mlx4_WRITE_ENTRY(dev, index, mailbox); |
225c7b1f | 773 | goto out; |
4dc51b32 | 774 | } |
225c7b1f | 775 | |
b12d93d6 YP |
776 | /* We are going to delete the entry, members count should be 0 */ |
777 | mgm->members_count = cpu_to_be32((u32) prot << 30); | |
778 | ||
225c7b1f RD |
779 | if (prev == -1) { |
780 | /* Remove entry from MGM */ | |
781 | int amgm_index = be32_to_cpu(mgm->next_gid_index) >> 6; | |
782 | if (amgm_index) { | |
0345584e | 783 | err = mlx4_READ_ENTRY(dev, amgm_index, mailbox); |
225c7b1f RD |
784 | if (err) |
785 | goto out; | |
786 | } else | |
787 | memset(mgm->gid, 0, 16); | |
788 | ||
0345584e | 789 | err = mlx4_WRITE_ENTRY(dev, index, mailbox); |
225c7b1f RD |
790 | if (err) |
791 | goto out; | |
792 | ||
793 | if (amgm_index) { | |
794 | if (amgm_index < dev->caps.num_mgms) | |
795 | mlx4_warn(dev, "MGM entry %d had AMGM index %d < %d", | |
796 | index, amgm_index, dev->caps.num_mgms); | |
797 | else | |
798 | mlx4_bitmap_free(&priv->mcg_table.bitmap, | |
799 | amgm_index - dev->caps.num_mgms); | |
800 | } | |
801 | } else { | |
802 | /* Remove entry from AMGM */ | |
803 | int cur_next_index = be32_to_cpu(mgm->next_gid_index) >> 6; | |
0345584e | 804 | err = mlx4_READ_ENTRY(dev, prev, mailbox); |
225c7b1f RD |
805 | if (err) |
806 | goto out; | |
807 | ||
808 | mgm->next_gid_index = cpu_to_be32(cur_next_index << 6); | |
809 | ||
0345584e | 810 | err = mlx4_WRITE_ENTRY(dev, prev, mailbox); |
225c7b1f RD |
811 | if (err) |
812 | goto out; | |
813 | ||
814 | if (index < dev->caps.num_mgms) | |
815 | mlx4_warn(dev, "entry %d had next AMGM index %d < %d", | |
816 | prev, index, dev->caps.num_mgms); | |
817 | else | |
818 | mlx4_bitmap_free(&priv->mcg_table.bitmap, | |
819 | index - dev->caps.num_mgms); | |
820 | } | |
821 | ||
822 | out: | |
823 | mutex_unlock(&priv->mcg_table.mutex); | |
824 | ||
825 | mlx4_free_cmd_mailbox(dev, mailbox); | |
826 | return err; | |
827 | } | |
0345584e YP |
828 | |
829 | ||
830 | int mlx4_multicast_attach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16], | |
831 | int block_mcast_loopback, enum mlx4_protocol prot) | |
832 | { | |
833 | enum mlx4_steer_type steer; | |
834 | ||
835 | steer = (is_valid_ether_addr(&gid[10])) ? MLX4_UC_STEER : MLX4_MC_STEER; | |
836 | ||
837 | if (prot == MLX4_PROT_ETH && !dev->caps.vep_mc_steering) | |
838 | return 0; | |
839 | ||
840 | if (prot == MLX4_PROT_ETH) | |
841 | gid[7] |= (steer << 1); | |
842 | ||
843 | return mlx4_qp_attach_common(dev, qp, gid, | |
844 | block_mcast_loopback, prot, | |
845 | steer); | |
846 | } | |
847 | EXPORT_SYMBOL_GPL(mlx4_multicast_attach); | |
848 | ||
849 | int mlx4_multicast_detach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16], | |
850 | enum mlx4_protocol prot) | |
851 | { | |
852 | enum mlx4_steer_type steer; | |
853 | ||
854 | steer = (is_valid_ether_addr(&gid[10])) ? MLX4_UC_STEER : MLX4_MC_STEER; | |
855 | ||
856 | if (prot == MLX4_PROT_ETH && !dev->caps.vep_mc_steering) | |
857 | return 0; | |
858 | ||
859 | if (prot == MLX4_PROT_ETH) { | |
860 | gid[7] |= (steer << 1); | |
861 | } | |
862 | ||
863 | return mlx4_qp_detach_common(dev, qp, gid, prot, steer); | |
864 | } | |
225c7b1f RD |
865 | EXPORT_SYMBOL_GPL(mlx4_multicast_detach); |
866 | ||
b12d93d6 YP |
867 | |
868 | int mlx4_multicast_promisc_add(struct mlx4_dev *dev, u32 qpn, u8 port) | |
869 | { | |
870 | if (!dev->caps.vep_mc_steering) | |
871 | return 0; | |
872 | ||
873 | ||
874 | return add_promisc_qp(dev, 0, port, MLX4_MC_STEER, qpn); | |
875 | } | |
876 | EXPORT_SYMBOL_GPL(mlx4_multicast_promisc_add); | |
877 | ||
878 | int mlx4_multicast_promisc_remove(struct mlx4_dev *dev, u32 qpn, u8 port) | |
879 | { | |
880 | if (!dev->caps.vep_mc_steering) | |
881 | return 0; | |
882 | ||
883 | ||
884 | return remove_promisc_qp(dev, 0, port, MLX4_MC_STEER, qpn); | |
885 | } | |
886 | EXPORT_SYMBOL_GPL(mlx4_multicast_promisc_remove); | |
887 | ||
888 | int mlx4_unicast_promisc_add(struct mlx4_dev *dev, u32 qpn, u8 port) | |
889 | { | |
890 | if (!dev->caps.vep_mc_steering) | |
891 | return 0; | |
892 | ||
893 | ||
894 | return add_promisc_qp(dev, 0, port, MLX4_UC_STEER, qpn); | |
895 | } | |
896 | EXPORT_SYMBOL_GPL(mlx4_unicast_promisc_add); | |
897 | ||
898 | int mlx4_unicast_promisc_remove(struct mlx4_dev *dev, u32 qpn, u8 port) | |
899 | { | |
900 | if (!dev->caps.vep_mc_steering) | |
901 | return 0; | |
902 | ||
903 | return remove_promisc_qp(dev, 0, port, MLX4_UC_STEER, qpn); | |
904 | } | |
905 | EXPORT_SYMBOL_GPL(mlx4_unicast_promisc_remove); | |
906 | ||
3d73c288 | 907 | int mlx4_init_mcg_table(struct mlx4_dev *dev) |
225c7b1f RD |
908 | { |
909 | struct mlx4_priv *priv = mlx4_priv(dev); | |
910 | int err; | |
911 | ||
93fc9e1b YP |
912 | err = mlx4_bitmap_init(&priv->mcg_table.bitmap, dev->caps.num_amgms, |
913 | dev->caps.num_amgms - 1, 0, 0); | |
225c7b1f RD |
914 | if (err) |
915 | return err; | |
916 | ||
917 | mutex_init(&priv->mcg_table.mutex); | |
918 | ||
919 | return 0; | |
920 | } | |
921 | ||
922 | void mlx4_cleanup_mcg_table(struct mlx4_dev *dev) | |
923 | { | |
924 | mlx4_bitmap_cleanup(&mlx4_priv(dev)->mcg_table.bitmap); | |
925 | } |