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Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm...
[deliverable/linux.git] / drivers / net / ethernet / ti / cpsw_ale.c
1 /*
2 * Texas Instruments 3-Port Ethernet Switch Address Lookup Engine
3 *
4 * Copyright (C) 2012 Texas Instruments
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation version 2.
9 *
10 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
11 * kind, whether express or implied; without even the implied warranty
12 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 */
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17 #include <linux/platform_device.h>
18 #include <linux/seq_file.h>
19 #include <linux/slab.h>
20 #include <linux/err.h>
21 #include <linux/io.h>
22 #include <linux/stat.h>
23 #include <linux/sysfs.h>
24 #include <linux/etherdevice.h>
25
26 #include "cpsw_ale.h"
27
28 #define BITMASK(bits) (BIT(bits) - 1)
29
30 #define ALE_VERSION_MAJOR(rev) ((rev >> 8) & 0xff)
31 #define ALE_VERSION_MINOR(rev) (rev & 0xff)
32
33 /* ALE Registers */
34 #define ALE_IDVER 0x00
35 #define ALE_CONTROL 0x08
36 #define ALE_PRESCALE 0x10
37 #define ALE_UNKNOWNVLAN 0x18
38 #define ALE_TABLE_CONTROL 0x20
39 #define ALE_TABLE 0x34
40 #define ALE_PORTCTL 0x40
41
42 #define ALE_TABLE_WRITE BIT(31)
43
44 #define ALE_TYPE_FREE 0
45 #define ALE_TYPE_ADDR 1
46 #define ALE_TYPE_VLAN 2
47 #define ALE_TYPE_VLAN_ADDR 3
48
49 #define ALE_UCAST_PERSISTANT 0
50 #define ALE_UCAST_UNTOUCHED 1
51 #define ALE_UCAST_OUI 2
52 #define ALE_UCAST_TOUCHED 3
53
54 static inline int cpsw_ale_get_field(u32 *ale_entry, u32 start, u32 bits)
55 {
56 int idx;
57
58 idx = start / 32;
59 start -= idx * 32;
60 idx = 2 - idx; /* flip */
61 return (ale_entry[idx] >> start) & BITMASK(bits);
62 }
63
64 static inline void cpsw_ale_set_field(u32 *ale_entry, u32 start, u32 bits,
65 u32 value)
66 {
67 int idx;
68
69 value &= BITMASK(bits);
70 idx = start / 32;
71 start -= idx * 32;
72 idx = 2 - idx; /* flip */
73 ale_entry[idx] &= ~(BITMASK(bits) << start);
74 ale_entry[idx] |= (value << start);
75 }
76
77 #define DEFINE_ALE_FIELD(name, start, bits) \
78 static inline int cpsw_ale_get_##name(u32 *ale_entry) \
79 { \
80 return cpsw_ale_get_field(ale_entry, start, bits); \
81 } \
82 static inline void cpsw_ale_set_##name(u32 *ale_entry, u32 value) \
83 { \
84 cpsw_ale_set_field(ale_entry, start, bits, value); \
85 }
86
87 DEFINE_ALE_FIELD(entry_type, 60, 2)
88 DEFINE_ALE_FIELD(vlan_id, 48, 12)
89 DEFINE_ALE_FIELD(mcast_state, 62, 2)
90 DEFINE_ALE_FIELD(port_mask, 66, 3)
91 DEFINE_ALE_FIELD(super, 65, 1)
92 DEFINE_ALE_FIELD(ucast_type, 62, 2)
93 DEFINE_ALE_FIELD(port_num, 66, 2)
94 DEFINE_ALE_FIELD(blocked, 65, 1)
95 DEFINE_ALE_FIELD(secure, 64, 1)
96 DEFINE_ALE_FIELD(vlan_untag_force, 24, 3)
97 DEFINE_ALE_FIELD(vlan_reg_mcast, 16, 3)
98 DEFINE_ALE_FIELD(vlan_unreg_mcast, 8, 3)
99 DEFINE_ALE_FIELD(vlan_member_list, 0, 3)
100 DEFINE_ALE_FIELD(mcast, 40, 1)
101
102 /* The MAC address field in the ALE entry cannot be macroized as above */
103 static inline void cpsw_ale_get_addr(u32 *ale_entry, u8 *addr)
104 {
105 int i;
106
107 for (i = 0; i < 6; i++)
108 addr[i] = cpsw_ale_get_field(ale_entry, 40 - 8*i, 8);
109 }
110
111 static inline void cpsw_ale_set_addr(u32 *ale_entry, u8 *addr)
112 {
113 int i;
114
115 for (i = 0; i < 6; i++)
116 cpsw_ale_set_field(ale_entry, 40 - 8*i, 8, addr[i]);
117 }
118
119 static int cpsw_ale_read(struct cpsw_ale *ale, int idx, u32 *ale_entry)
120 {
121 int i;
122
123 WARN_ON(idx > ale->params.ale_entries);
124
125 __raw_writel(idx, ale->params.ale_regs + ALE_TABLE_CONTROL);
126
127 for (i = 0; i < ALE_ENTRY_WORDS; i++)
128 ale_entry[i] = __raw_readl(ale->params.ale_regs +
129 ALE_TABLE + 4 * i);
130
131 return idx;
132 }
133
134 static int cpsw_ale_write(struct cpsw_ale *ale, int idx, u32 *ale_entry)
135 {
136 int i;
137
138 WARN_ON(idx > ale->params.ale_entries);
139
140 for (i = 0; i < ALE_ENTRY_WORDS; i++)
141 __raw_writel(ale_entry[i], ale->params.ale_regs +
142 ALE_TABLE + 4 * i);
143
144 __raw_writel(idx | ALE_TABLE_WRITE, ale->params.ale_regs +
145 ALE_TABLE_CONTROL);
146
147 return idx;
148 }
149
150 static int cpsw_ale_match_addr(struct cpsw_ale *ale, u8 *addr, u16 vid)
151 {
152 u32 ale_entry[ALE_ENTRY_WORDS];
153 int type, idx;
154
155 for (idx = 0; idx < ale->params.ale_entries; idx++) {
156 u8 entry_addr[6];
157
158 cpsw_ale_read(ale, idx, ale_entry);
159 type = cpsw_ale_get_entry_type(ale_entry);
160 if (type != ALE_TYPE_ADDR && type != ALE_TYPE_VLAN_ADDR)
161 continue;
162 if (cpsw_ale_get_vlan_id(ale_entry) != vid)
163 continue;
164 cpsw_ale_get_addr(ale_entry, entry_addr);
165 if (ether_addr_equal(entry_addr, addr))
166 return idx;
167 }
168 return -ENOENT;
169 }
170
171 static int cpsw_ale_match_vlan(struct cpsw_ale *ale, u16 vid)
172 {
173 u32 ale_entry[ALE_ENTRY_WORDS];
174 int type, idx;
175
176 for (idx = 0; idx < ale->params.ale_entries; idx++) {
177 cpsw_ale_read(ale, idx, ale_entry);
178 type = cpsw_ale_get_entry_type(ale_entry);
179 if (type != ALE_TYPE_VLAN)
180 continue;
181 if (cpsw_ale_get_vlan_id(ale_entry) == vid)
182 return idx;
183 }
184 return -ENOENT;
185 }
186
187 static int cpsw_ale_match_free(struct cpsw_ale *ale)
188 {
189 u32 ale_entry[ALE_ENTRY_WORDS];
190 int type, idx;
191
192 for (idx = 0; idx < ale->params.ale_entries; idx++) {
193 cpsw_ale_read(ale, idx, ale_entry);
194 type = cpsw_ale_get_entry_type(ale_entry);
195 if (type == ALE_TYPE_FREE)
196 return idx;
197 }
198 return -ENOENT;
199 }
200
201 static int cpsw_ale_find_ageable(struct cpsw_ale *ale)
202 {
203 u32 ale_entry[ALE_ENTRY_WORDS];
204 int type, idx;
205
206 for (idx = 0; idx < ale->params.ale_entries; idx++) {
207 cpsw_ale_read(ale, idx, ale_entry);
208 type = cpsw_ale_get_entry_type(ale_entry);
209 if (type != ALE_TYPE_ADDR && type != ALE_TYPE_VLAN_ADDR)
210 continue;
211 if (cpsw_ale_get_mcast(ale_entry))
212 continue;
213 type = cpsw_ale_get_ucast_type(ale_entry);
214 if (type != ALE_UCAST_PERSISTANT &&
215 type != ALE_UCAST_OUI)
216 return idx;
217 }
218 return -ENOENT;
219 }
220
221 static void cpsw_ale_flush_mcast(struct cpsw_ale *ale, u32 *ale_entry,
222 int port_mask)
223 {
224 int mask;
225
226 mask = cpsw_ale_get_port_mask(ale_entry);
227 if ((mask & port_mask) == 0)
228 return; /* ports dont intersect, not interested */
229 mask &= ~port_mask;
230
231 /* free if only remaining port is host port */
232 if (mask)
233 cpsw_ale_set_port_mask(ale_entry, mask);
234 else
235 cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_FREE);
236 }
237
238 int cpsw_ale_flush_multicast(struct cpsw_ale *ale, int port_mask, int vid)
239 {
240 u32 ale_entry[ALE_ENTRY_WORDS];
241 int ret, idx;
242
243 for (idx = 0; idx < ale->params.ale_entries; idx++) {
244 cpsw_ale_read(ale, idx, ale_entry);
245 ret = cpsw_ale_get_entry_type(ale_entry);
246 if (ret != ALE_TYPE_ADDR && ret != ALE_TYPE_VLAN_ADDR)
247 continue;
248
249 /* if vid passed is -1 then remove all multicast entry from
250 * the table irrespective of vlan id, if a valid vlan id is
251 * passed then remove only multicast added to that vlan id.
252 * if vlan id doesn't match then move on to next entry.
253 */
254 if (vid != -1 && cpsw_ale_get_vlan_id(ale_entry) != vid)
255 continue;
256
257 if (cpsw_ale_get_mcast(ale_entry)) {
258 u8 addr[6];
259
260 cpsw_ale_get_addr(ale_entry, addr);
261 if (!is_broadcast_ether_addr(addr))
262 cpsw_ale_flush_mcast(ale, ale_entry, port_mask);
263 }
264
265 cpsw_ale_write(ale, idx, ale_entry);
266 }
267 return 0;
268 }
269 EXPORT_SYMBOL_GPL(cpsw_ale_flush_multicast);
270
271 static inline void cpsw_ale_set_vlan_entry_type(u32 *ale_entry,
272 int flags, u16 vid)
273 {
274 if (flags & ALE_VLAN) {
275 cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_VLAN_ADDR);
276 cpsw_ale_set_vlan_id(ale_entry, vid);
277 } else {
278 cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_ADDR);
279 }
280 }
281
282 int cpsw_ale_add_ucast(struct cpsw_ale *ale, u8 *addr, int port,
283 int flags, u16 vid)
284 {
285 u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
286 int idx;
287
288 cpsw_ale_set_vlan_entry_type(ale_entry, flags, vid);
289
290 cpsw_ale_set_addr(ale_entry, addr);
291 cpsw_ale_set_ucast_type(ale_entry, ALE_UCAST_PERSISTANT);
292 cpsw_ale_set_secure(ale_entry, (flags & ALE_SECURE) ? 1 : 0);
293 cpsw_ale_set_blocked(ale_entry, (flags & ALE_BLOCKED) ? 1 : 0);
294 cpsw_ale_set_port_num(ale_entry, port);
295
296 idx = cpsw_ale_match_addr(ale, addr, (flags & ALE_VLAN) ? vid : 0);
297 if (idx < 0)
298 idx = cpsw_ale_match_free(ale);
299 if (idx < 0)
300 idx = cpsw_ale_find_ageable(ale);
301 if (idx < 0)
302 return -ENOMEM;
303
304 cpsw_ale_write(ale, idx, ale_entry);
305 return 0;
306 }
307 EXPORT_SYMBOL_GPL(cpsw_ale_add_ucast);
308
309 int cpsw_ale_del_ucast(struct cpsw_ale *ale, u8 *addr, int port,
310 int flags, u16 vid)
311 {
312 u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
313 int idx;
314
315 idx = cpsw_ale_match_addr(ale, addr, (flags & ALE_VLAN) ? vid : 0);
316 if (idx < 0)
317 return -ENOENT;
318
319 cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_FREE);
320 cpsw_ale_write(ale, idx, ale_entry);
321 return 0;
322 }
323 EXPORT_SYMBOL_GPL(cpsw_ale_del_ucast);
324
325 int cpsw_ale_add_mcast(struct cpsw_ale *ale, u8 *addr, int port_mask,
326 int flags, u16 vid, int mcast_state)
327 {
328 u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
329 int idx, mask;
330
331 idx = cpsw_ale_match_addr(ale, addr, (flags & ALE_VLAN) ? vid : 0);
332 if (idx >= 0)
333 cpsw_ale_read(ale, idx, ale_entry);
334
335 cpsw_ale_set_vlan_entry_type(ale_entry, flags, vid);
336
337 cpsw_ale_set_addr(ale_entry, addr);
338 cpsw_ale_set_super(ale_entry, (flags & ALE_BLOCKED) ? 1 : 0);
339 cpsw_ale_set_mcast_state(ale_entry, mcast_state);
340
341 mask = cpsw_ale_get_port_mask(ale_entry);
342 port_mask |= mask;
343 cpsw_ale_set_port_mask(ale_entry, port_mask);
344
345 if (idx < 0)
346 idx = cpsw_ale_match_free(ale);
347 if (idx < 0)
348 idx = cpsw_ale_find_ageable(ale);
349 if (idx < 0)
350 return -ENOMEM;
351
352 cpsw_ale_write(ale, idx, ale_entry);
353 return 0;
354 }
355 EXPORT_SYMBOL_GPL(cpsw_ale_add_mcast);
356
357 int cpsw_ale_del_mcast(struct cpsw_ale *ale, u8 *addr, int port_mask,
358 int flags, u16 vid)
359 {
360 u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
361 int idx;
362
363 idx = cpsw_ale_match_addr(ale, addr, (flags & ALE_VLAN) ? vid : 0);
364 if (idx < 0)
365 return -EINVAL;
366
367 cpsw_ale_read(ale, idx, ale_entry);
368
369 if (port_mask)
370 cpsw_ale_set_port_mask(ale_entry, port_mask);
371 else
372 cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_FREE);
373
374 cpsw_ale_write(ale, idx, ale_entry);
375 return 0;
376 }
377 EXPORT_SYMBOL_GPL(cpsw_ale_del_mcast);
378
379 int cpsw_ale_add_vlan(struct cpsw_ale *ale, u16 vid, int port, int untag,
380 int reg_mcast, int unreg_mcast)
381 {
382 u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
383 int idx;
384
385 idx = cpsw_ale_match_vlan(ale, vid);
386 if (idx >= 0)
387 cpsw_ale_read(ale, idx, ale_entry);
388
389 cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_VLAN);
390 cpsw_ale_set_vlan_id(ale_entry, vid);
391
392 cpsw_ale_set_vlan_untag_force(ale_entry, untag);
393 cpsw_ale_set_vlan_reg_mcast(ale_entry, reg_mcast);
394 cpsw_ale_set_vlan_unreg_mcast(ale_entry, unreg_mcast);
395 cpsw_ale_set_vlan_member_list(ale_entry, port);
396
397 if (idx < 0)
398 idx = cpsw_ale_match_free(ale);
399 if (idx < 0)
400 idx = cpsw_ale_find_ageable(ale);
401 if (idx < 0)
402 return -ENOMEM;
403
404 cpsw_ale_write(ale, idx, ale_entry);
405 return 0;
406 }
407 EXPORT_SYMBOL_GPL(cpsw_ale_add_vlan);
408
409 int cpsw_ale_del_vlan(struct cpsw_ale *ale, u16 vid, int port_mask)
410 {
411 u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
412 int idx;
413
414 idx = cpsw_ale_match_vlan(ale, vid);
415 if (idx < 0)
416 return -ENOENT;
417
418 cpsw_ale_read(ale, idx, ale_entry);
419
420 if (port_mask)
421 cpsw_ale_set_vlan_member_list(ale_entry, port_mask);
422 else
423 cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_FREE);
424
425 cpsw_ale_write(ale, idx, ale_entry);
426 return 0;
427 }
428 EXPORT_SYMBOL_GPL(cpsw_ale_del_vlan);
429
430 void cpsw_ale_set_allmulti(struct cpsw_ale *ale, int allmulti)
431 {
432 u32 ale_entry[ALE_ENTRY_WORDS];
433 int type, idx;
434 int unreg_mcast = 0;
435
436 /* Only bother doing the work if the setting is actually changing */
437 if (ale->allmulti == allmulti)
438 return;
439
440 /* Remember the new setting to check against next time */
441 ale->allmulti = allmulti;
442
443 for (idx = 0; idx < ale->params.ale_entries; idx++) {
444 cpsw_ale_read(ale, idx, ale_entry);
445 type = cpsw_ale_get_entry_type(ale_entry);
446 if (type != ALE_TYPE_VLAN)
447 continue;
448
449 unreg_mcast = cpsw_ale_get_vlan_unreg_mcast(ale_entry);
450 if (allmulti)
451 unreg_mcast |= 1;
452 else
453 unreg_mcast &= ~1;
454 cpsw_ale_set_vlan_unreg_mcast(ale_entry, unreg_mcast);
455 cpsw_ale_write(ale, idx, ale_entry);
456 }
457 }
458 EXPORT_SYMBOL_GPL(cpsw_ale_set_allmulti);
459
460 struct ale_control_info {
461 const char *name;
462 int offset, port_offset;
463 int shift, port_shift;
464 int bits;
465 };
466
467 static const struct ale_control_info ale_controls[ALE_NUM_CONTROLS] = {
468 [ALE_ENABLE] = {
469 .name = "enable",
470 .offset = ALE_CONTROL,
471 .port_offset = 0,
472 .shift = 31,
473 .port_shift = 0,
474 .bits = 1,
475 },
476 [ALE_CLEAR] = {
477 .name = "clear",
478 .offset = ALE_CONTROL,
479 .port_offset = 0,
480 .shift = 30,
481 .port_shift = 0,
482 .bits = 1,
483 },
484 [ALE_AGEOUT] = {
485 .name = "ageout",
486 .offset = ALE_CONTROL,
487 .port_offset = 0,
488 .shift = 29,
489 .port_shift = 0,
490 .bits = 1,
491 },
492 [ALE_P0_UNI_FLOOD] = {
493 .name = "port0_unicast_flood",
494 .offset = ALE_CONTROL,
495 .port_offset = 0,
496 .shift = 8,
497 .port_shift = 0,
498 .bits = 1,
499 },
500 [ALE_VLAN_NOLEARN] = {
501 .name = "vlan_nolearn",
502 .offset = ALE_CONTROL,
503 .port_offset = 0,
504 .shift = 7,
505 .port_shift = 0,
506 .bits = 1,
507 },
508 [ALE_NO_PORT_VLAN] = {
509 .name = "no_port_vlan",
510 .offset = ALE_CONTROL,
511 .port_offset = 0,
512 .shift = 6,
513 .port_shift = 0,
514 .bits = 1,
515 },
516 [ALE_OUI_DENY] = {
517 .name = "oui_deny",
518 .offset = ALE_CONTROL,
519 .port_offset = 0,
520 .shift = 5,
521 .port_shift = 0,
522 .bits = 1,
523 },
524 [ALE_BYPASS] = {
525 .name = "bypass",
526 .offset = ALE_CONTROL,
527 .port_offset = 0,
528 .shift = 4,
529 .port_shift = 0,
530 .bits = 1,
531 },
532 [ALE_RATE_LIMIT_TX] = {
533 .name = "rate_limit_tx",
534 .offset = ALE_CONTROL,
535 .port_offset = 0,
536 .shift = 3,
537 .port_shift = 0,
538 .bits = 1,
539 },
540 [ALE_VLAN_AWARE] = {
541 .name = "vlan_aware",
542 .offset = ALE_CONTROL,
543 .port_offset = 0,
544 .shift = 2,
545 .port_shift = 0,
546 .bits = 1,
547 },
548 [ALE_AUTH_ENABLE] = {
549 .name = "auth_enable",
550 .offset = ALE_CONTROL,
551 .port_offset = 0,
552 .shift = 1,
553 .port_shift = 0,
554 .bits = 1,
555 },
556 [ALE_RATE_LIMIT] = {
557 .name = "rate_limit",
558 .offset = ALE_CONTROL,
559 .port_offset = 0,
560 .shift = 0,
561 .port_shift = 0,
562 .bits = 1,
563 },
564 [ALE_PORT_STATE] = {
565 .name = "port_state",
566 .offset = ALE_PORTCTL,
567 .port_offset = 4,
568 .shift = 0,
569 .port_shift = 0,
570 .bits = 2,
571 },
572 [ALE_PORT_DROP_UNTAGGED] = {
573 .name = "drop_untagged",
574 .offset = ALE_PORTCTL,
575 .port_offset = 4,
576 .shift = 2,
577 .port_shift = 0,
578 .bits = 1,
579 },
580 [ALE_PORT_DROP_UNKNOWN_VLAN] = {
581 .name = "drop_unknown",
582 .offset = ALE_PORTCTL,
583 .port_offset = 4,
584 .shift = 3,
585 .port_shift = 0,
586 .bits = 1,
587 },
588 [ALE_PORT_NOLEARN] = {
589 .name = "nolearn",
590 .offset = ALE_PORTCTL,
591 .port_offset = 4,
592 .shift = 4,
593 .port_shift = 0,
594 .bits = 1,
595 },
596 [ALE_PORT_NO_SA_UPDATE] = {
597 .name = "no_source_update",
598 .offset = ALE_PORTCTL,
599 .port_offset = 4,
600 .shift = 5,
601 .port_shift = 0,
602 .bits = 1,
603 },
604 [ALE_PORT_MCAST_LIMIT] = {
605 .name = "mcast_limit",
606 .offset = ALE_PORTCTL,
607 .port_offset = 4,
608 .shift = 16,
609 .port_shift = 0,
610 .bits = 8,
611 },
612 [ALE_PORT_BCAST_LIMIT] = {
613 .name = "bcast_limit",
614 .offset = ALE_PORTCTL,
615 .port_offset = 4,
616 .shift = 24,
617 .port_shift = 0,
618 .bits = 8,
619 },
620 [ALE_PORT_UNKNOWN_VLAN_MEMBER] = {
621 .name = "unknown_vlan_member",
622 .offset = ALE_UNKNOWNVLAN,
623 .port_offset = 0,
624 .shift = 0,
625 .port_shift = 0,
626 .bits = 6,
627 },
628 [ALE_PORT_UNKNOWN_MCAST_FLOOD] = {
629 .name = "unknown_mcast_flood",
630 .offset = ALE_UNKNOWNVLAN,
631 .port_offset = 0,
632 .shift = 8,
633 .port_shift = 0,
634 .bits = 6,
635 },
636 [ALE_PORT_UNKNOWN_REG_MCAST_FLOOD] = {
637 .name = "unknown_reg_flood",
638 .offset = ALE_UNKNOWNVLAN,
639 .port_offset = 0,
640 .shift = 16,
641 .port_shift = 0,
642 .bits = 6,
643 },
644 [ALE_PORT_UNTAGGED_EGRESS] = {
645 .name = "untagged_egress",
646 .offset = ALE_UNKNOWNVLAN,
647 .port_offset = 0,
648 .shift = 24,
649 .port_shift = 0,
650 .bits = 6,
651 },
652 };
653
654 int cpsw_ale_control_set(struct cpsw_ale *ale, int port, int control,
655 int value)
656 {
657 const struct ale_control_info *info;
658 int offset, shift;
659 u32 tmp, mask;
660
661 if (control < 0 || control >= ARRAY_SIZE(ale_controls))
662 return -EINVAL;
663
664 info = &ale_controls[control];
665 if (info->port_offset == 0 && info->port_shift == 0)
666 port = 0; /* global, port is a dont care */
667
668 if (port < 0 || port > ale->params.ale_ports)
669 return -EINVAL;
670
671 mask = BITMASK(info->bits);
672 if (value & ~mask)
673 return -EINVAL;
674
675 offset = info->offset + (port * info->port_offset);
676 shift = info->shift + (port * info->port_shift);
677
678 tmp = __raw_readl(ale->params.ale_regs + offset);
679 tmp = (tmp & ~(mask << shift)) | (value << shift);
680 __raw_writel(tmp, ale->params.ale_regs + offset);
681
682 return 0;
683 }
684 EXPORT_SYMBOL_GPL(cpsw_ale_control_set);
685
686 int cpsw_ale_control_get(struct cpsw_ale *ale, int port, int control)
687 {
688 const struct ale_control_info *info;
689 int offset, shift;
690 u32 tmp;
691
692 if (control < 0 || control >= ARRAY_SIZE(ale_controls))
693 return -EINVAL;
694
695 info = &ale_controls[control];
696 if (info->port_offset == 0 && info->port_shift == 0)
697 port = 0; /* global, port is a dont care */
698
699 if (port < 0 || port > ale->params.ale_ports)
700 return -EINVAL;
701
702 offset = info->offset + (port * info->port_offset);
703 shift = info->shift + (port * info->port_shift);
704
705 tmp = __raw_readl(ale->params.ale_regs + offset) >> shift;
706 return tmp & BITMASK(info->bits);
707 }
708 EXPORT_SYMBOL_GPL(cpsw_ale_control_get);
709
710 static void cpsw_ale_timer(unsigned long arg)
711 {
712 struct cpsw_ale *ale = (struct cpsw_ale *)arg;
713
714 cpsw_ale_control_set(ale, 0, ALE_AGEOUT, 1);
715
716 if (ale->ageout) {
717 ale->timer.expires = jiffies + ale->ageout;
718 add_timer(&ale->timer);
719 }
720 }
721
722 void cpsw_ale_start(struct cpsw_ale *ale)
723 {
724 u32 rev;
725
726 rev = __raw_readl(ale->params.ale_regs + ALE_IDVER);
727 dev_dbg(ale->params.dev, "initialized cpsw ale revision %d.%d\n",
728 ALE_VERSION_MAJOR(rev), ALE_VERSION_MINOR(rev));
729 cpsw_ale_control_set(ale, 0, ALE_ENABLE, 1);
730 cpsw_ale_control_set(ale, 0, ALE_CLEAR, 1);
731
732 init_timer(&ale->timer);
733 ale->timer.data = (unsigned long)ale;
734 ale->timer.function = cpsw_ale_timer;
735 if (ale->ageout) {
736 ale->timer.expires = jiffies + ale->ageout;
737 add_timer(&ale->timer);
738 }
739 }
740 EXPORT_SYMBOL_GPL(cpsw_ale_start);
741
742 void cpsw_ale_stop(struct cpsw_ale *ale)
743 {
744 del_timer_sync(&ale->timer);
745 }
746 EXPORT_SYMBOL_GPL(cpsw_ale_stop);
747
748 struct cpsw_ale *cpsw_ale_create(struct cpsw_ale_params *params)
749 {
750 struct cpsw_ale *ale;
751
752 ale = kzalloc(sizeof(*ale), GFP_KERNEL);
753 if (!ale)
754 return NULL;
755
756 ale->params = *params;
757 ale->ageout = ale->params.ale_ageout * HZ;
758
759 return ale;
760 }
761 EXPORT_SYMBOL_GPL(cpsw_ale_create);
762
763 int cpsw_ale_destroy(struct cpsw_ale *ale)
764 {
765 if (!ale)
766 return -EINVAL;
767 cpsw_ale_control_set(ale, 0, ALE_ENABLE, 0);
768 kfree(ale);
769 return 0;
770 }
771 EXPORT_SYMBOL_GPL(cpsw_ale_destroy);
772
773 void cpsw_ale_dump(struct cpsw_ale *ale, u32 *data)
774 {
775 int i;
776
777 for (i = 0; i < ale->params.ale_entries; i++) {
778 cpsw_ale_read(ale, i, data);
779 data += ALE_ENTRY_WORDS;
780 }
781 }
782 EXPORT_SYMBOL_GPL(cpsw_ale_dump);
783
784 MODULE_LICENSE("GPL v2");
785 MODULE_DESCRIPTION("TI CPSW ALE driver");
786 MODULE_AUTHOR("Texas Instruments");
Linux kernel - Deliverables
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