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1/*
2 * Copyright (c) 2007 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 <linux/errno.h>
34#include <linux/if_ether.h>
35
36#include <linux/mlx4/cmd.h>
37
38#include "mlx4.h"
39
40#define MLX4_MAC_VALID (1ull << 63)
41#define MLX4_MAC_MASK 0xffffffffffffULL
42
43#define MLX4_VLAN_VALID (1u << 31)
44#define MLX4_VLAN_MASK 0xfff
45
46void mlx4_init_mac_table(struct mlx4_dev *dev, struct mlx4_mac_table *table)
47{
48 int i;
49
50 mutex_init(&table->mutex);
51 for (i = 0; i < MLX4_MAX_MAC_NUM; i++) {
52 table->entries[i] = 0;
53 table->refs[i] = 0;
54 }
55 table->max = 1 << dev->caps.log_num_macs;
56 table->total = 0;
57}
58
59void mlx4_init_vlan_table(struct mlx4_dev *dev, struct mlx4_vlan_table *table)
60{
61 int i;
62
63 mutex_init(&table->mutex);
64 for (i = 0; i < MLX4_MAX_VLAN_NUM; i++) {
65 table->entries[i] = 0;
66 table->refs[i] = 0;
67 }
68 table->max = 1 << dev->caps.log_num_vlans;
69 table->total = 0;
70}
71
72static int mlx4_set_port_mac_table(struct mlx4_dev *dev, u8 port,
73 __be64 *entries)
74{
75 struct mlx4_cmd_mailbox *mailbox;
76 u32 in_mod;
77 int err;
78
79 mailbox = mlx4_alloc_cmd_mailbox(dev);
80 if (IS_ERR(mailbox))
81 return PTR_ERR(mailbox);
82
83 memcpy(mailbox->buf, entries, MLX4_MAC_TABLE_SIZE);
84
85 in_mod = MLX4_SET_PORT_MAC_TABLE << 8 | port;
86 err = mlx4_cmd(dev, mailbox->dma, in_mod, 1, MLX4_CMD_SET_PORT,
87 MLX4_CMD_TIME_CLASS_B);
88
89 mlx4_free_cmd_mailbox(dev, mailbox);
90 return err;
91}
92
93static int mlx4_uc_steer_add(struct mlx4_dev *dev, u8 port,
94 u64 mac, int *qpn, u8 reserve)
95{
96 struct mlx4_qp qp;
97 u8 gid[16] = {0};
98 int err;
99
100 if (reserve) {
101 err = mlx4_qp_reserve_range(dev, 1, 1, qpn);
102 if (err) {
103 mlx4_err(dev, "Failed to reserve qp for mac registration\n");
104 return err;
105 }
106 }
107 qp.qpn = *qpn;
108
109 mac &= 0xffffffffffffULL;
110 mac = cpu_to_be64(mac << 16);
111 memcpy(&gid[10], &mac, ETH_ALEN);
112 gid[5] = port;
113 gid[7] = MLX4_UC_STEER << 1;
114
115 err = mlx4_qp_attach_common(dev, &qp, gid, 0,
116 MLX4_PROT_ETH, MLX4_UC_STEER);
117 if (err && reserve)
118 mlx4_qp_release_range(dev, *qpn, 1);
119
120 return err;
121}
122
123static void mlx4_uc_steer_release(struct mlx4_dev *dev, u8 port,
124 u64 mac, int qpn, u8 free)
125{
126 struct mlx4_qp qp;
127 u8 gid[16] = {0};
128
129 qp.qpn = qpn;
130 mac &= 0xffffffffffffULL;
131 mac = cpu_to_be64(mac << 16);
132 memcpy(&gid[10], &mac, ETH_ALEN);
133 gid[5] = port;
134 gid[7] = MLX4_UC_STEER << 1;
135
136 mlx4_qp_detach_common(dev, &qp, gid, MLX4_PROT_ETH, MLX4_UC_STEER);
137 if (free)
138 mlx4_qp_release_range(dev, qpn, 1);
139}
140
141int mlx4_register_mac(struct mlx4_dev *dev, u8 port, u64 mac, int *qpn, u8 wrap)
142{
143 struct mlx4_port_info *info = &mlx4_priv(dev)->port[port];
144 struct mlx4_mac_table *table = &info->mac_table;
145 struct mlx4_mac_entry *entry;
146 int i, err = 0;
147 int free = -1;
148
149 if (dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_UC_STEER) {
150 err = mlx4_uc_steer_add(dev, port, mac, qpn, 1);
151 if (!err) {
152 entry = kmalloc(sizeof *entry, GFP_KERNEL);
153 if (!entry) {
154 mlx4_uc_steer_release(dev, port, mac, *qpn, 1);
155 return -ENOMEM;
156 }
157 entry->mac = mac;
158 err = radix_tree_insert(&info->mac_tree, *qpn, entry);
159 if (err) {
160 mlx4_uc_steer_release(dev, port, mac, *qpn, 1);
161 return err;
162 }
163 } else
164 return err;
165 }
166 mlx4_dbg(dev, "Registering MAC: 0x%llx\n", (unsigned long long) mac);
167 mutex_lock(&table->mutex);
168 for (i = 0; i < MLX4_MAX_MAC_NUM - 1; i++) {
169 if (free < 0 && !table->refs[i]) {
170 free = i;
171 continue;
172 }
173
174 if (mac == (MLX4_MAC_MASK & be64_to_cpu(table->entries[i]))) {
175 /* MAC already registered, increase references count */
176 ++table->refs[i];
177 goto out;
178 }
179 }
180
181 if (free < 0) {
182 err = -ENOMEM;
183 goto out;
184 }
185
186 mlx4_dbg(dev, "Free MAC index is %d\n", free);
187
188 if (table->total == table->max) {
189 /* No free mac entries */
190 err = -ENOSPC;
191 goto out;
192 }
193
194 /* Register new MAC */
195 table->refs[free] = 1;
196 table->entries[free] = cpu_to_be64(mac | MLX4_MAC_VALID);
197
198 err = mlx4_set_port_mac_table(dev, port, table->entries);
199 if (unlikely(err)) {
200 mlx4_err(dev, "Failed adding MAC: 0x%llx\n", (unsigned long long) mac);
201 table->refs[free] = 0;
202 table->entries[free] = 0;
203 goto out;
204 }
205
206 if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_UC_STEER))
207 *qpn = info->base_qpn + free;
208 ++table->total;
209out:
210 mutex_unlock(&table->mutex);
211 return err;
212}
213EXPORT_SYMBOL_GPL(mlx4_register_mac);
214
215static int validate_index(struct mlx4_dev *dev,
216 struct mlx4_mac_table *table, int index)
217{
218 int err = 0;
219
220 if (index < 0 || index >= table->max || !table->entries[index]) {
221 mlx4_warn(dev, "No valid Mac entry for the given index\n");
222 err = -EINVAL;
223 }
224 return err;
225}
226
227static int find_index(struct mlx4_dev *dev,
228 struct mlx4_mac_table *table, u64 mac)
229{
230 int i;
231 for (i = 0; i < MLX4_MAX_MAC_NUM; i++) {
232 if (mac == (MLX4_MAC_MASK & be64_to_cpu(table->entries[i])))
233 return i;
234 }
235 /* Mac not found */
236 return -EINVAL;
237}
238
239void mlx4_unregister_mac(struct mlx4_dev *dev, u8 port, int qpn)
240{
241 struct mlx4_port_info *info = &mlx4_priv(dev)->port[port];
242 struct mlx4_mac_table *table = &info->mac_table;
243 int index = qpn - info->base_qpn;
244 struct mlx4_mac_entry *entry;
245
246 if (dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_UC_STEER) {
247 entry = radix_tree_lookup(&info->mac_tree, qpn);
248 if (entry) {
249 mlx4_uc_steer_release(dev, port, entry->mac, qpn, 1);
250 radix_tree_delete(&info->mac_tree, qpn);
251 index = find_index(dev, table, entry->mac);
252 kfree(entry);
253 }
254 }
255
256 mutex_lock(&table->mutex);
257
258 if (validate_index(dev, table, index))
259 goto out;
260
261 /* Check whether this address has reference count */
262 if (!(--table->refs[index])) {
263 table->entries[index] = 0;
264 mlx4_set_port_mac_table(dev, port, table->entries);
265 --table->total;
266 }
267out:
268 mutex_unlock(&table->mutex);
269}
270EXPORT_SYMBOL_GPL(mlx4_unregister_mac);
271
272int mlx4_replace_mac(struct mlx4_dev *dev, u8 port, int qpn, u64 new_mac, u8 wrap)
273{
274 struct mlx4_port_info *info = &mlx4_priv(dev)->port[port];
275 struct mlx4_mac_table *table = &info->mac_table;
276 int index = qpn - info->base_qpn;
277 struct mlx4_mac_entry *entry;
278 int err;
279
280 if (dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_UC_STEER) {
281 entry = radix_tree_lookup(&info->mac_tree, qpn);
282 if (!entry)
283 return -EINVAL;
284 index = find_index(dev, table, entry->mac);
285 mlx4_uc_steer_release(dev, port, entry->mac, qpn, 0);
286 entry->mac = new_mac;
287 err = mlx4_uc_steer_add(dev, port, entry->mac, &qpn, 0);
288 if (err || index < 0)
289 return err;
290 }
291
292 mutex_lock(&table->mutex);
293
294 err = validate_index(dev, table, index);
295 if (err)
296 goto out;
297
298 table->entries[index] = cpu_to_be64(new_mac | MLX4_MAC_VALID);
299
300 err = mlx4_set_port_mac_table(dev, port, table->entries);
301 if (unlikely(err)) {
302 mlx4_err(dev, "Failed adding MAC: 0x%llx\n", (unsigned long long) new_mac);
303 table->entries[index] = 0;
304 }
305out:
306 mutex_unlock(&table->mutex);
307 return err;
308}
309EXPORT_SYMBOL_GPL(mlx4_replace_mac);
310static int mlx4_set_port_vlan_table(struct mlx4_dev *dev, u8 port,
311 __be32 *entries)
312{
313 struct mlx4_cmd_mailbox *mailbox;
314 u32 in_mod;
315 int err;
316
317 mailbox = mlx4_alloc_cmd_mailbox(dev);
318 if (IS_ERR(mailbox))
319 return PTR_ERR(mailbox);
320
321 memcpy(mailbox->buf, entries, MLX4_VLAN_TABLE_SIZE);
322 in_mod = MLX4_SET_PORT_VLAN_TABLE << 8 | port;
323 err = mlx4_cmd(dev, mailbox->dma, in_mod, 1, MLX4_CMD_SET_PORT,
324 MLX4_CMD_TIME_CLASS_B);
325
326 mlx4_free_cmd_mailbox(dev, mailbox);
327
328 return err;
329}
330
331int mlx4_find_cached_vlan(struct mlx4_dev *dev, u8 port, u16 vid, int *idx)
332{
333 struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;
334 int i;
335
336 for (i = 0; i < MLX4_MAX_VLAN_NUM; ++i) {
337 if (table->refs[i] &&
338 (vid == (MLX4_VLAN_MASK &
339 be32_to_cpu(table->entries[i])))) {
340 /* VLAN already registered, increase reference count */
341 *idx = i;
342 return 0;
343 }
344 }
345
346 return -ENOENT;
347}
348EXPORT_SYMBOL_GPL(mlx4_find_cached_vlan);
349
350int mlx4_register_vlan(struct mlx4_dev *dev, u8 port, u16 vlan, int *index)
351{
352 struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;
353 int i, err = 0;
354 int free = -1;
355
356 mutex_lock(&table->mutex);
357 for (i = MLX4_VLAN_REGULAR; i < MLX4_MAX_VLAN_NUM; i++) {
358 if (free < 0 && (table->refs[i] == 0)) {
359 free = i;
360 continue;
361 }
362
363 if (table->refs[i] &&
364 (vlan == (MLX4_VLAN_MASK &
365 be32_to_cpu(table->entries[i])))) {
366 /* Vlan already registered, increase references count */
367 *index = i;
368 ++table->refs[i];
369 goto out;
370 }
371 }
372
373 if (free < 0) {
374 err = -ENOMEM;
375 goto out;
376 }
377
378 if (table->total == table->max) {
379 /* No free vlan entries */
380 err = -ENOSPC;
381 goto out;
382 }
383
384 /* Register new MAC */
385 table->refs[free] = 1;
386 table->entries[free] = cpu_to_be32(vlan | MLX4_VLAN_VALID);
387
388 err = mlx4_set_port_vlan_table(dev, port, table->entries);
389 if (unlikely(err)) {
390 mlx4_warn(dev, "Failed adding vlan: %u\n", vlan);
391 table->refs[free] = 0;
392 table->entries[free] = 0;
393 goto out;
394 }
395
396 *index = free;
397 ++table->total;
398out:
399 mutex_unlock(&table->mutex);
400 return err;
401}
402EXPORT_SYMBOL_GPL(mlx4_register_vlan);
403
404void mlx4_unregister_vlan(struct mlx4_dev *dev, u8 port, int index)
405{
406 struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;
407
408 if (index < MLX4_VLAN_REGULAR) {
409 mlx4_warn(dev, "Trying to free special vlan index %d\n", index);
410 return;
411 }
412
413 mutex_lock(&table->mutex);
414 if (!table->refs[index]) {
415 mlx4_warn(dev, "No vlan entry for index %d\n", index);
416 goto out;
417 }
418 if (--table->refs[index]) {
419 mlx4_dbg(dev, "Have more references for index %d,"
420 "no need to modify vlan table\n", index);
421 goto out;
422 }
423 table->entries[index] = 0;
424 mlx4_set_port_vlan_table(dev, port, table->entries);
425 --table->total;
426out:
427 mutex_unlock(&table->mutex);
428}
429EXPORT_SYMBOL_GPL(mlx4_unregister_vlan);
430
431int mlx4_get_port_ib_caps(struct mlx4_dev *dev, u8 port, __be32 *caps)
432{
433 struct mlx4_cmd_mailbox *inmailbox, *outmailbox;
434 u8 *inbuf, *outbuf;
435 int err;
436
437 inmailbox = mlx4_alloc_cmd_mailbox(dev);
438 if (IS_ERR(inmailbox))
439 return PTR_ERR(inmailbox);
440
441 outmailbox = mlx4_alloc_cmd_mailbox(dev);
442 if (IS_ERR(outmailbox)) {
443 mlx4_free_cmd_mailbox(dev, inmailbox);
444 return PTR_ERR(outmailbox);
445 }
446
447 inbuf = inmailbox->buf;
448 outbuf = outmailbox->buf;
449 memset(inbuf, 0, 256);
450 memset(outbuf, 0, 256);
451 inbuf[0] = 1;
452 inbuf[1] = 1;
453 inbuf[2] = 1;
454 inbuf[3] = 1;
455 *(__be16 *) (&inbuf[16]) = cpu_to_be16(0x0015);
456 *(__be32 *) (&inbuf[20]) = cpu_to_be32(port);
457
458 err = mlx4_cmd_box(dev, inmailbox->dma, outmailbox->dma, port, 3,
459 MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C);
460 if (!err)
461 *caps = *(__be32 *) (outbuf + 84);
462 mlx4_free_cmd_mailbox(dev, inmailbox);
463 mlx4_free_cmd_mailbox(dev, outmailbox);
464 return err;
465}
466
467int mlx4_SET_PORT(struct mlx4_dev *dev, u8 port)
468{
469 struct mlx4_cmd_mailbox *mailbox;
470 int err;
471
472 if (dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH)
473 return 0;
474
475 mailbox = mlx4_alloc_cmd_mailbox(dev);
476 if (IS_ERR(mailbox))
477 return PTR_ERR(mailbox);
478
479 memset(mailbox->buf, 0, 256);
480
481 ((__be32 *) mailbox->buf)[1] = dev->caps.ib_port_def_cap[port];
482 err = mlx4_cmd(dev, mailbox->dma, port, 0, MLX4_CMD_SET_PORT,
483 MLX4_CMD_TIME_CLASS_B);
484
485 mlx4_free_cmd_mailbox(dev, mailbox);
486 return err;
487}