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1// SPDX-License-Identifier: (GPL-2.0 or MIT)
2/*
3 * DSA driver for:
4 * Hirschmann Hellcreek TSN switch.
5 *
6 * Copyright (C) 2019-2021 Linutronix GmbH
7 * Author Kurt Kanzenbach <kurt@linutronix.de>
8 */
9
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/device.h>
13#include <linux/of.h>
14#include <linux/of_device.h>
15#include <linux/of_mdio.h>
16#include <linux/platform_device.h>
17#include <linux/bitops.h>
18#include <linux/if_bridge.h>
19#include <linux/if_vlan.h>
20#include <linux/etherdevice.h>
21#include <linux/random.h>
22#include <linux/iopoll.h>
23#include <linux/mutex.h>
24#include <linux/delay.h>
25#include <net/dsa.h>
26
27#include "hellcreek.h"
28#include "hellcreek_ptp.h"
29#include "hellcreek_hwtstamp.h"
30
31static const struct hellcreek_counter hellcreek_counter[] = {
32 { 0x00, "RxFiltered", },
33 { 0x01, "RxOctets1k", },
34 { 0x02, "RxVTAG", },
35 { 0x03, "RxL2BAD", },
36 { 0x04, "RxOverloadDrop", },
37 { 0x05, "RxUC", },
38 { 0x06, "RxMC", },
39 { 0x07, "RxBC", },
40 { 0x08, "RxRS<64", },
41 { 0x09, "RxRS64", },
42 { 0x0a, "RxRS65_127", },
43 { 0x0b, "RxRS128_255", },
44 { 0x0c, "RxRS256_511", },
45 { 0x0d, "RxRS512_1023", },
46 { 0x0e, "RxRS1024_1518", },
47 { 0x0f, "RxRS>1518", },
48 { 0x10, "TxTailDropQueue0", },
49 { 0x11, "TxTailDropQueue1", },
50 { 0x12, "TxTailDropQueue2", },
51 { 0x13, "TxTailDropQueue3", },
52 { 0x14, "TxTailDropQueue4", },
53 { 0x15, "TxTailDropQueue5", },
54 { 0x16, "TxTailDropQueue6", },
55 { 0x17, "TxTailDropQueue7", },
56 { 0x18, "RxTrafficClass0", },
57 { 0x19, "RxTrafficClass1", },
58 { 0x1a, "RxTrafficClass2", },
59 { 0x1b, "RxTrafficClass3", },
60 { 0x1c, "RxTrafficClass4", },
61 { 0x1d, "RxTrafficClass5", },
62 { 0x1e, "RxTrafficClass6", },
63 { 0x1f, "RxTrafficClass7", },
64 { 0x21, "TxOctets1k", },
65 { 0x22, "TxVTAG", },
66 { 0x23, "TxL2BAD", },
67 { 0x25, "TxUC", },
68 { 0x26, "TxMC", },
69 { 0x27, "TxBC", },
70 { 0x28, "TxTS<64", },
71 { 0x29, "TxTS64", },
72 { 0x2a, "TxTS65_127", },
73 { 0x2b, "TxTS128_255", },
74 { 0x2c, "TxTS256_511", },
75 { 0x2d, "TxTS512_1023", },
76 { 0x2e, "TxTS1024_1518", },
77 { 0x2f, "TxTS>1518", },
78 { 0x30, "TxTrafficClassOverrun0", },
79 { 0x31, "TxTrafficClassOverrun1", },
80 { 0x32, "TxTrafficClassOverrun2", },
81 { 0x33, "TxTrafficClassOverrun3", },
82 { 0x34, "TxTrafficClassOverrun4", },
83 { 0x35, "TxTrafficClassOverrun5", },
84 { 0x36, "TxTrafficClassOverrun6", },
85 { 0x37, "TxTrafficClassOverrun7", },
86 { 0x38, "TxTrafficClass0", },
87 { 0x39, "TxTrafficClass1", },
88 { 0x3a, "TxTrafficClass2", },
89 { 0x3b, "TxTrafficClass3", },
90 { 0x3c, "TxTrafficClass4", },
91 { 0x3d, "TxTrafficClass5", },
92 { 0x3e, "TxTrafficClass6", },
93 { 0x3f, "TxTrafficClass7", },
94};
95
96static u16 hellcreek_read(struct hellcreek *hellcreek, unsigned int offset)
97{
98 return readw(hellcreek->base + offset);
99}
100
101static u16 hellcreek_read_ctrl(struct hellcreek *hellcreek)
102{
103 return readw(hellcreek->base + HR_CTRL_C);
104}
105
106static u16 hellcreek_read_stat(struct hellcreek *hellcreek)
107{
108 return readw(hellcreek->base + HR_SWSTAT);
109}
110
111static void hellcreek_write(struct hellcreek *hellcreek, u16 data,
112 unsigned int offset)
113{
114 writew(data, hellcreek->base + offset);
115}
116
117static void hellcreek_select_port(struct hellcreek *hellcreek, int port)
118{
119 u16 val = port << HR_PSEL_PTWSEL_SHIFT;
120
121 hellcreek_write(hellcreek, val, HR_PSEL);
122}
123
124static void hellcreek_select_prio(struct hellcreek *hellcreek, int prio)
125{
126 u16 val = prio << HR_PSEL_PRTCWSEL_SHIFT;
127
128 hellcreek_write(hellcreek, val, HR_PSEL);
129}
130
131static void hellcreek_select_port_prio(struct hellcreek *hellcreek, int port,
132 int prio)
133{
134 u16 val = port << HR_PSEL_PTWSEL_SHIFT;
135
136 val |= prio << HR_PSEL_PRTCWSEL_SHIFT;
137
138 hellcreek_write(hellcreek, val, HR_PSEL);
139}
140
141static void hellcreek_select_counter(struct hellcreek *hellcreek, int counter)
142{
143 u16 val = counter << HR_CSEL_SHIFT;
144
145 hellcreek_write(hellcreek, val, HR_CSEL);
146
147 /* Data sheet states to wait at least 20 internal clock cycles */
148 ndelay(200);
149}
150
151static void hellcreek_select_vlan(struct hellcreek *hellcreek, int vid,
152 bool pvid)
153{
154 u16 val = 0;
155
156 /* Set pvid bit first */
157 if (pvid)
158 val |= HR_VIDCFG_PVID;
159 hellcreek_write(hellcreek, val, HR_VIDCFG);
160
161 /* Set vlan */
162 val |= vid << HR_VIDCFG_VID_SHIFT;
163 hellcreek_write(hellcreek, val, HR_VIDCFG);
164}
165
166static void hellcreek_select_tgd(struct hellcreek *hellcreek, int port)
167{
168 u16 val = port << TR_TGDSEL_TDGSEL_SHIFT;
169
170 hellcreek_write(hellcreek, val, TR_TGDSEL);
171}
172
173static int hellcreek_wait_until_ready(struct hellcreek *hellcreek)
174{
175 u16 val;
176
177 /* Wait up to 1ms, although 3 us should be enough */
178 return readx_poll_timeout(hellcreek_read_ctrl, hellcreek,
179 val, val & HR_CTRL_C_READY,
180 3, 1000);
181}
182
183static int hellcreek_wait_until_transitioned(struct hellcreek *hellcreek)
184{
185 u16 val;
186
187 return readx_poll_timeout_atomic(hellcreek_read_ctrl, hellcreek,
188 val, !(val & HR_CTRL_C_TRANSITION),
189 1, 1000);
190}
191
192static int hellcreek_wait_fdb_ready(struct hellcreek *hellcreek)
193{
194 u16 val;
195
196 return readx_poll_timeout_atomic(hellcreek_read_stat, hellcreek,
197 val, !(val & HR_SWSTAT_BUSY),
198 1, 1000);
199}
200
201static int hellcreek_detect(struct hellcreek *hellcreek)
202{
203 u16 id, rel_low, rel_high, date_low, date_high, tgd_ver;
204 u8 tgd_maj, tgd_min;
205 u32 rel, date;
206
207 id = hellcreek_read(hellcreek, HR_MODID_C);
208 rel_low = hellcreek_read(hellcreek, HR_REL_L_C);
209 rel_high = hellcreek_read(hellcreek, HR_REL_H_C);
210 date_low = hellcreek_read(hellcreek, HR_BLD_L_C);
211 date_high = hellcreek_read(hellcreek, HR_BLD_H_C);
212 tgd_ver = hellcreek_read(hellcreek, TR_TGDVER);
213
214 if (id != hellcreek->pdata->module_id)
215 return -ENODEV;
216
217 rel = rel_low | (rel_high << 16);
218 date = date_low | (date_high << 16);
219 tgd_maj = (tgd_ver & TR_TGDVER_REV_MAJ_MASK) >> TR_TGDVER_REV_MAJ_SHIFT;
220 tgd_min = (tgd_ver & TR_TGDVER_REV_MIN_MASK) >> TR_TGDVER_REV_MIN_SHIFT;
221
222 dev_info(hellcreek->dev, "Module ID=%02x Release=%04x Date=%04x TGD Version=%02x.%02x\n",
223 id, rel, date, tgd_maj, tgd_min);
224
225 return 0;
226}
227
228static void hellcreek_feature_detect(struct hellcreek *hellcreek)
229{
230 u16 features;
231
232 features = hellcreek_read(hellcreek, HR_FEABITS0);
233
234 /* Only detect the size of the FDB table. The size and current
235 * utilization can be queried via devlink.
236 */
237 hellcreek->fdb_entries = ((features & HR_FEABITS0_FDBBINS_MASK) >>
238 HR_FEABITS0_FDBBINS_SHIFT) * 32;
239}
240
241static enum dsa_tag_protocol hellcreek_get_tag_protocol(struct dsa_switch *ds,
242 int port,
243 enum dsa_tag_protocol mp)
244{
245 return DSA_TAG_PROTO_HELLCREEK;
246}
247
248static int hellcreek_port_enable(struct dsa_switch *ds, int port,
249 struct phy_device *phy)
250{
251 struct hellcreek *hellcreek = ds->priv;
252 struct hellcreek_port *hellcreek_port;
253 u16 val;
254
255 hellcreek_port = &hellcreek->ports[port];
256
257 dev_dbg(hellcreek->dev, "Enable port %d\n", port);
258
259 mutex_lock(&hellcreek->reg_lock);
260
261 hellcreek_select_port(hellcreek, port);
262 val = hellcreek_port->ptcfg;
263 val |= HR_PTCFG_ADMIN_EN;
264 hellcreek_write(hellcreek, val, HR_PTCFG);
265 hellcreek_port->ptcfg = val;
266
267 mutex_unlock(&hellcreek->reg_lock);
268
269 return 0;
270}
271
272static void hellcreek_port_disable(struct dsa_switch *ds, int port)
273{
274 struct hellcreek *hellcreek = ds->priv;
275 struct hellcreek_port *hellcreek_port;
276 u16 val;
277
278 hellcreek_port = &hellcreek->ports[port];
279
280 dev_dbg(hellcreek->dev, "Disable port %d\n", port);
281
282 mutex_lock(&hellcreek->reg_lock);
283
284 hellcreek_select_port(hellcreek, port);
285 val = hellcreek_port->ptcfg;
286 val &= ~HR_PTCFG_ADMIN_EN;
287 hellcreek_write(hellcreek, val, HR_PTCFG);
288 hellcreek_port->ptcfg = val;
289
290 mutex_unlock(&hellcreek->reg_lock);
291}
292
293static void hellcreek_get_strings(struct dsa_switch *ds, int port,
294 u32 stringset, uint8_t *data)
295{
296 int i;
297
298 for (i = 0; i < ARRAY_SIZE(hellcreek_counter); ++i) {
299 const struct hellcreek_counter *counter = &hellcreek_counter[i];
300
301 strscpy(data + i * ETH_GSTRING_LEN,
302 counter->name, ETH_GSTRING_LEN);
303 }
304}
305
306static int hellcreek_get_sset_count(struct dsa_switch *ds, int port, int sset)
307{
308 if (sset != ETH_SS_STATS)
309 return 0;
310
311 return ARRAY_SIZE(hellcreek_counter);
312}
313
314static void hellcreek_get_ethtool_stats(struct dsa_switch *ds, int port,
315 uint64_t *data)
316{
317 struct hellcreek *hellcreek = ds->priv;
318 struct hellcreek_port *hellcreek_port;
319 int i;
320
321 hellcreek_port = &hellcreek->ports[port];
322
323 for (i = 0; i < ARRAY_SIZE(hellcreek_counter); ++i) {
324 const struct hellcreek_counter *counter = &hellcreek_counter[i];
325 u8 offset = counter->offset + port * 64;
326 u16 high, low;
327 u64 value;
328
329 mutex_lock(&hellcreek->reg_lock);
330
331 hellcreek_select_counter(hellcreek, offset);
332
333 /* The registers are locked internally by selecting the
334 * counter. So low and high can be read without reading high
335 * again.
336 */
337 high = hellcreek_read(hellcreek, HR_CRDH);
338 low = hellcreek_read(hellcreek, HR_CRDL);
339 value = ((u64)high << 16) | low;
340
341 hellcreek_port->counter_values[i] += value;
342 data[i] = hellcreek_port->counter_values[i];
343
344 mutex_unlock(&hellcreek->reg_lock);
345 }
346}
347
348static u16 hellcreek_private_vid(int port)
349{
350 return VLAN_N_VID - port + 1;
351}
352
353static int hellcreek_vlan_prepare(struct dsa_switch *ds, int port,
354 const struct switchdev_obj_port_vlan *vlan,
355 struct netlink_ext_ack *extack)
356{
357 struct hellcreek *hellcreek = ds->priv;
358 int i;
359
360 dev_dbg(hellcreek->dev, "VLAN prepare for port %d\n", port);
361
362 /* Restriction: Make sure that nobody uses the "private" VLANs. These
363 * VLANs are internally used by the driver to ensure port
364 * separation. Thus, they cannot be used by someone else.
365 */
366 for (i = 0; i < hellcreek->pdata->num_ports; ++i) {
367 const u16 restricted_vid = hellcreek_private_vid(i);
368
369 if (!dsa_is_user_port(ds, i))
370 continue;
371
372 if (vlan->vid == restricted_vid) {
373 NL_SET_ERR_MSG_MOD(extack, "VID restricted by driver");
374 return -EBUSY;
375 }
376 }
377
378 return 0;
379}
380
381static void hellcreek_select_vlan_params(struct hellcreek *hellcreek, int port,
382 int *shift, int *mask)
383{
384 switch (port) {
385 case 0:
386 *shift = HR_VIDMBRCFG_P0MBR_SHIFT;
387 *mask = HR_VIDMBRCFG_P0MBR_MASK;
388 break;
389 case 1:
390 *shift = HR_VIDMBRCFG_P1MBR_SHIFT;
391 *mask = HR_VIDMBRCFG_P1MBR_MASK;
392 break;
393 case 2:
394 *shift = HR_VIDMBRCFG_P2MBR_SHIFT;
395 *mask = HR_VIDMBRCFG_P2MBR_MASK;
396 break;
397 case 3:
398 *shift = HR_VIDMBRCFG_P3MBR_SHIFT;
399 *mask = HR_VIDMBRCFG_P3MBR_MASK;
400 break;
401 default:
402 *shift = *mask = 0;
403 dev_err(hellcreek->dev, "Unknown port %d selected!\n", port);
404 }
405}
406
407static void hellcreek_apply_vlan(struct hellcreek *hellcreek, int port, u16 vid,
408 bool pvid, bool untagged)
409{
410 int shift, mask;
411 u16 val;
412
413 dev_dbg(hellcreek->dev, "Apply VLAN: port=%d vid=%u pvid=%d untagged=%d",
414 port, vid, pvid, untagged);
415
416 mutex_lock(&hellcreek->reg_lock);
417
418 hellcreek_select_port(hellcreek, port);
419 hellcreek_select_vlan(hellcreek, vid, pvid);
420
421 /* Setup port vlan membership */
422 hellcreek_select_vlan_params(hellcreek, port, &shift, &mask);
423 val = hellcreek->vidmbrcfg[vid];
424 val &= ~mask;
425 if (untagged)
426 val |= HELLCREEK_VLAN_UNTAGGED_MEMBER << shift;
427 else
428 val |= HELLCREEK_VLAN_TAGGED_MEMBER << shift;
429
430 hellcreek_write(hellcreek, val, HR_VIDMBRCFG);
431 hellcreek->vidmbrcfg[vid] = val;
432
433 mutex_unlock(&hellcreek->reg_lock);
434}
435
436static void hellcreek_unapply_vlan(struct hellcreek *hellcreek, int port,
437 u16 vid)
438{
439 int shift, mask;
440 u16 val;
441
442 dev_dbg(hellcreek->dev, "Unapply VLAN: port=%d vid=%u\n", port, vid);
443
444 mutex_lock(&hellcreek->reg_lock);
445
446 hellcreek_select_vlan(hellcreek, vid, false);
447
448 /* Setup port vlan membership */
449 hellcreek_select_vlan_params(hellcreek, port, &shift, &mask);
450 val = hellcreek->vidmbrcfg[vid];
451 val &= ~mask;
452 val |= HELLCREEK_VLAN_NO_MEMBER << shift;
453
454 hellcreek_write(hellcreek, val, HR_VIDMBRCFG);
455 hellcreek->vidmbrcfg[vid] = val;
456
457 mutex_unlock(&hellcreek->reg_lock);
458}
459
460static int hellcreek_vlan_add(struct dsa_switch *ds, int port,
461 const struct switchdev_obj_port_vlan *vlan,
462 struct netlink_ext_ack *extack)
463{
464 bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
465 bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;
466 struct hellcreek *hellcreek = ds->priv;
467 int err;
468
469 err = hellcreek_vlan_prepare(ds, port, vlan, extack);
470 if (err)
471 return err;
472
473 dev_dbg(hellcreek->dev, "Add VLAN %d on port %d, %s, %s\n",
474 vlan->vid, port, untagged ? "untagged" : "tagged",
475 pvid ? "PVID" : "no PVID");
476
477 hellcreek_apply_vlan(hellcreek, port, vlan->vid, pvid, untagged);
478
479 return 0;
480}
481
482static int hellcreek_vlan_del(struct dsa_switch *ds, int port,
483 const struct switchdev_obj_port_vlan *vlan)
484{
485 struct hellcreek *hellcreek = ds->priv;
486
487 dev_dbg(hellcreek->dev, "Remove VLAN %d on port %d\n", vlan->vid, port);
488
489 hellcreek_unapply_vlan(hellcreek, port, vlan->vid);
490
491 return 0;
492}
493
494static void hellcreek_port_stp_state_set(struct dsa_switch *ds, int port,
495 u8 state)
496{
497 struct hellcreek *hellcreek = ds->priv;
498 struct hellcreek_port *hellcreek_port;
499 const char *new_state;
500 u16 val;
501
502 mutex_lock(&hellcreek->reg_lock);
503
504 hellcreek_port = &hellcreek->ports[port];
505 val = hellcreek_port->ptcfg;
506
507 switch (state) {
508 case BR_STATE_DISABLED:
509 new_state = "DISABLED";
510 val |= HR_PTCFG_BLOCKED;
511 val &= ~HR_PTCFG_LEARNING_EN;
512 break;
513 case BR_STATE_BLOCKING:
514 new_state = "BLOCKING";
515 val |= HR_PTCFG_BLOCKED;
516 val &= ~HR_PTCFG_LEARNING_EN;
517 break;
518 case BR_STATE_LISTENING:
519 new_state = "LISTENING";
520 val |= HR_PTCFG_BLOCKED;
521 val &= ~HR_PTCFG_LEARNING_EN;
522 break;
523 case BR_STATE_LEARNING:
524 new_state = "LEARNING";
525 val |= HR_PTCFG_BLOCKED;
526 val |= HR_PTCFG_LEARNING_EN;
527 break;
528 case BR_STATE_FORWARDING:
529 new_state = "FORWARDING";
530 val &= ~HR_PTCFG_BLOCKED;
531 val |= HR_PTCFG_LEARNING_EN;
532 break;
533 default:
534 new_state = "UNKNOWN";
535 }
536
537 hellcreek_select_port(hellcreek, port);
538 hellcreek_write(hellcreek, val, HR_PTCFG);
539 hellcreek_port->ptcfg = val;
540
541 mutex_unlock(&hellcreek->reg_lock);
542
543 dev_dbg(hellcreek->dev, "Configured STP state for port %d: %s\n",
544 port, new_state);
545}
546
547static void hellcreek_setup_ingressflt(struct hellcreek *hellcreek, int port,
548 bool enable)
549{
550 struct hellcreek_port *hellcreek_port = &hellcreek->ports[port];
551 u16 ptcfg;
552
553 mutex_lock(&hellcreek->reg_lock);
554
555 ptcfg = hellcreek_port->ptcfg;
556
557 if (enable)
558 ptcfg |= HR_PTCFG_INGRESSFLT;
559 else
560 ptcfg &= ~HR_PTCFG_INGRESSFLT;
561
562 hellcreek_select_port(hellcreek, port);
563 hellcreek_write(hellcreek, ptcfg, HR_PTCFG);
564 hellcreek_port->ptcfg = ptcfg;
565
566 mutex_unlock(&hellcreek->reg_lock);
567}
568
569static void hellcreek_setup_vlan_awareness(struct hellcreek *hellcreek,
570 bool enable)
571{
572 u16 swcfg;
573
574 mutex_lock(&hellcreek->reg_lock);
575
576 swcfg = hellcreek->swcfg;
577
578 if (enable)
579 swcfg |= HR_SWCFG_VLAN_UNAWARE;
580 else
581 swcfg &= ~HR_SWCFG_VLAN_UNAWARE;
582
583 hellcreek_write(hellcreek, swcfg, HR_SWCFG);
584
585 mutex_unlock(&hellcreek->reg_lock);
586}
587
588/* Default setup for DSA: VLAN <X>: CPU and Port <X> egress untagged. */
589static void hellcreek_setup_vlan_membership(struct dsa_switch *ds, int port,
590 bool enabled)
591{
592 const u16 vid = hellcreek_private_vid(port);
593 int upstream = dsa_upstream_port(ds, port);
594 struct hellcreek *hellcreek = ds->priv;
595
596 /* Apply vid to port as egress untagged and port vlan id */
597 if (enabled)
598 hellcreek_apply_vlan(hellcreek, port, vid, true, true);
599 else
600 hellcreek_unapply_vlan(hellcreek, port, vid);
601
602 /* Apply vid to cpu port as well */
603 if (enabled)
604 hellcreek_apply_vlan(hellcreek, upstream, vid, false, true);
605 else
606 hellcreek_unapply_vlan(hellcreek, upstream, vid);
607}
608
609static void hellcreek_port_set_ucast_flood(struct hellcreek *hellcreek,
610 int port, bool enable)
611{
612 struct hellcreek_port *hellcreek_port;
613 u16 val;
614
615 hellcreek_port = &hellcreek->ports[port];
616
617 dev_dbg(hellcreek->dev, "%s unicast flooding on port %d\n",
618 enable ? "Enable" : "Disable", port);
619
620 mutex_lock(&hellcreek->reg_lock);
621
622 hellcreek_select_port(hellcreek, port);
623 val = hellcreek_port->ptcfg;
624 if (enable)
625 val &= ~HR_PTCFG_UUC_FLT;
626 else
627 val |= HR_PTCFG_UUC_FLT;
628 hellcreek_write(hellcreek, val, HR_PTCFG);
629 hellcreek_port->ptcfg = val;
630
631 mutex_unlock(&hellcreek->reg_lock);
632}
633
634static void hellcreek_port_set_mcast_flood(struct hellcreek *hellcreek,
635 int port, bool enable)
636{
637 struct hellcreek_port *hellcreek_port;
638 u16 val;
639
640 hellcreek_port = &hellcreek->ports[port];
641
642 dev_dbg(hellcreek->dev, "%s multicast flooding on port %d\n",
643 enable ? "Enable" : "Disable", port);
644
645 mutex_lock(&hellcreek->reg_lock);
646
647 hellcreek_select_port(hellcreek, port);
648 val = hellcreek_port->ptcfg;
649 if (enable)
650 val &= ~HR_PTCFG_UMC_FLT;
651 else
652 val |= HR_PTCFG_UMC_FLT;
653 hellcreek_write(hellcreek, val, HR_PTCFG);
654 hellcreek_port->ptcfg = val;
655
656 mutex_unlock(&hellcreek->reg_lock);
657}
658
659static int hellcreek_pre_bridge_flags(struct dsa_switch *ds, int port,
660 struct switchdev_brport_flags flags,
661 struct netlink_ext_ack *extack)
662{
663 if (flags.mask & ~(BR_FLOOD | BR_MCAST_FLOOD))
664 return -EINVAL;
665
666 return 0;
667}
668
669static int hellcreek_bridge_flags(struct dsa_switch *ds, int port,
670 struct switchdev_brport_flags flags,
671 struct netlink_ext_ack *extack)
672{
673 struct hellcreek *hellcreek = ds->priv;
674
675 if (flags.mask & BR_FLOOD)
676 hellcreek_port_set_ucast_flood(hellcreek, port,
677 !!(flags.val & BR_FLOOD));
678
679 if (flags.mask & BR_MCAST_FLOOD)
680 hellcreek_port_set_mcast_flood(hellcreek, port,
681 !!(flags.val & BR_MCAST_FLOOD));
682
683 return 0;
684}
685
686static int hellcreek_port_bridge_join(struct dsa_switch *ds, int port,
687 struct dsa_bridge bridge,
688 bool *tx_fwd_offload,
689 struct netlink_ext_ack *extack)
690{
691 struct hellcreek *hellcreek = ds->priv;
692
693 dev_dbg(hellcreek->dev, "Port %d joins a bridge\n", port);
694
695 /* When joining a vlan_filtering bridge, keep the switch VLAN aware */
696 if (!ds->vlan_filtering)
697 hellcreek_setup_vlan_awareness(hellcreek, false);
698
699 /* Drop private vlans */
700 hellcreek_setup_vlan_membership(ds, port, false);
701
702 return 0;
703}
704
705static void hellcreek_port_bridge_leave(struct dsa_switch *ds, int port,
706 struct dsa_bridge bridge)
707{
708 struct hellcreek *hellcreek = ds->priv;
709
710 dev_dbg(hellcreek->dev, "Port %d leaves a bridge\n", port);
711
712 /* Enable VLAN awareness */
713 hellcreek_setup_vlan_awareness(hellcreek, true);
714
715 /* Enable private vlans */
716 hellcreek_setup_vlan_membership(ds, port, true);
717}
718
719static int __hellcreek_fdb_add(struct hellcreek *hellcreek,
720 const struct hellcreek_fdb_entry *entry)
721{
722 u16 meta = 0;
723
724 dev_dbg(hellcreek->dev, "Add static FDB entry: MAC=%pM, MASK=0x%02x, "
725 "OBT=%d, PASS_BLOCKED=%d, REPRIO_EN=%d, PRIO=%d\n", entry->mac,
726 entry->portmask, entry->is_obt, entry->pass_blocked,
727 entry->reprio_en, entry->reprio_tc);
728
729 /* Add mac address */
730 hellcreek_write(hellcreek, entry->mac[1] | (entry->mac[0] << 8), HR_FDBWDH);
731 hellcreek_write(hellcreek, entry->mac[3] | (entry->mac[2] << 8), HR_FDBWDM);
732 hellcreek_write(hellcreek, entry->mac[5] | (entry->mac[4] << 8), HR_FDBWDL);
733
734 /* Meta data */
735 meta |= entry->portmask << HR_FDBWRM0_PORTMASK_SHIFT;
736 if (entry->is_obt)
737 meta |= HR_FDBWRM0_OBT;
738 if (entry->pass_blocked)
739 meta |= HR_FDBWRM0_PASS_BLOCKED;
740 if (entry->reprio_en) {
741 meta |= HR_FDBWRM0_REPRIO_EN;
742 meta |= entry->reprio_tc << HR_FDBWRM0_REPRIO_TC_SHIFT;
743 }
744 hellcreek_write(hellcreek, meta, HR_FDBWRM0);
745
746 /* Commit */
747 hellcreek_write(hellcreek, 0x00, HR_FDBWRCMD);
748
749 /* Wait until done */
750 return hellcreek_wait_fdb_ready(hellcreek);
751}
752
753static int __hellcreek_fdb_del(struct hellcreek *hellcreek,
754 const struct hellcreek_fdb_entry *entry)
755{
756 dev_dbg(hellcreek->dev, "Delete FDB entry: MAC=%pM!\n", entry->mac);
757
758 /* Delete by matching idx */
759 hellcreek_write(hellcreek, entry->idx | HR_FDBWRCMD_FDBDEL, HR_FDBWRCMD);
760
761 /* Wait until done */
762 return hellcreek_wait_fdb_ready(hellcreek);
763}
764
765static void hellcreek_populate_fdb_entry(struct hellcreek *hellcreek,
766 struct hellcreek_fdb_entry *entry,
767 size_t idx)
768{
769 unsigned char addr[ETH_ALEN];
770 u16 meta, mac;
771
772 /* Read values */
773 meta = hellcreek_read(hellcreek, HR_FDBMDRD);
774 mac = hellcreek_read(hellcreek, HR_FDBRDL);
775 addr[5] = mac & 0xff;
776 addr[4] = (mac & 0xff00) >> 8;
777 mac = hellcreek_read(hellcreek, HR_FDBRDM);
778 addr[3] = mac & 0xff;
779 addr[2] = (mac & 0xff00) >> 8;
780 mac = hellcreek_read(hellcreek, HR_FDBRDH);
781 addr[1] = mac & 0xff;
782 addr[0] = (mac & 0xff00) >> 8;
783
784 /* Populate @entry */
785 memcpy(entry->mac, addr, sizeof(addr));
786 entry->idx = idx;
787 entry->portmask = (meta & HR_FDBMDRD_PORTMASK_MASK) >>
788 HR_FDBMDRD_PORTMASK_SHIFT;
789 entry->age = (meta & HR_FDBMDRD_AGE_MASK) >>
790 HR_FDBMDRD_AGE_SHIFT;
791 entry->is_obt = !!(meta & HR_FDBMDRD_OBT);
792 entry->pass_blocked = !!(meta & HR_FDBMDRD_PASS_BLOCKED);
793 entry->is_static = !!(meta & HR_FDBMDRD_STATIC);
794 entry->reprio_tc = (meta & HR_FDBMDRD_REPRIO_TC_MASK) >>
795 HR_FDBMDRD_REPRIO_TC_SHIFT;
796 entry->reprio_en = !!(meta & HR_FDBMDRD_REPRIO_EN);
797}
798
799/* Retrieve the index of a FDB entry by mac address. Currently we search through
800 * the complete table in hardware. If that's too slow, we might have to cache
801 * the complete FDB table in software.
802 */
803static int hellcreek_fdb_get(struct hellcreek *hellcreek,
804 const unsigned char *dest,
805 struct hellcreek_fdb_entry *entry)
806{
807 size_t i;
808
809 /* Set read pointer to zero: The read of HR_FDBMAX (read-only register)
810 * should reset the internal pointer. But, that doesn't work. The vendor
811 * suggested a subsequent write as workaround. Same for HR_FDBRDH below.
812 */
813 hellcreek_read(hellcreek, HR_FDBMAX);
814 hellcreek_write(hellcreek, 0x00, HR_FDBMAX);
815
816 /* We have to read the complete table, because the switch/driver might
817 * enter new entries anywhere.
818 */
819 for (i = 0; i < hellcreek->fdb_entries; ++i) {
820 struct hellcreek_fdb_entry tmp = { 0 };
821
822 /* Read entry */
823 hellcreek_populate_fdb_entry(hellcreek, &tmp, i);
824
825 /* Force next entry */
826 hellcreek_write(hellcreek, 0x00, HR_FDBRDH);
827
828 if (memcmp(tmp.mac, dest, ETH_ALEN))
829 continue;
830
831 /* Match found */
832 memcpy(entry, &tmp, sizeof(*entry));
833
834 return 0;
835 }
836
837 return -ENOENT;
838}
839
840static int hellcreek_fdb_add(struct dsa_switch *ds, int port,
841 const unsigned char *addr, u16 vid,
842 struct dsa_db db)
843{
844 struct hellcreek_fdb_entry entry = { 0 };
845 struct hellcreek *hellcreek = ds->priv;
846 int ret;
847
848 dev_dbg(hellcreek->dev, "Add FDB entry for MAC=%pM\n", addr);
849
850 mutex_lock(&hellcreek->reg_lock);
851
852 ret = hellcreek_fdb_get(hellcreek, addr, &entry);
853 if (ret) {
854 /* Not found */
855 memcpy(entry.mac, addr, sizeof(entry.mac));
856 entry.portmask = BIT(port);
857
858 ret = __hellcreek_fdb_add(hellcreek, &entry);
859 if (ret) {
860 dev_err(hellcreek->dev, "Failed to add FDB entry!\n");
861 goto out;
862 }
863 } else {
864 /* Found */
865 ret = __hellcreek_fdb_del(hellcreek, &entry);
866 if (ret) {
867 dev_err(hellcreek->dev, "Failed to delete FDB entry!\n");
868 goto out;
869 }
870
871 entry.portmask |= BIT(port);
872
873 ret = __hellcreek_fdb_add(hellcreek, &entry);
874 if (ret) {
875 dev_err(hellcreek->dev, "Failed to add FDB entry!\n");
876 goto out;
877 }
878 }
879
880out:
881 mutex_unlock(&hellcreek->reg_lock);
882
883 return ret;
884}
885
886static int hellcreek_fdb_del(struct dsa_switch *ds, int port,
887 const unsigned char *addr, u16 vid,
888 struct dsa_db db)
889{
890 struct hellcreek_fdb_entry entry = { 0 };
891 struct hellcreek *hellcreek = ds->priv;
892 int ret;
893
894 dev_dbg(hellcreek->dev, "Delete FDB entry for MAC=%pM\n", addr);
895
896 mutex_lock(&hellcreek->reg_lock);
897
898 ret = hellcreek_fdb_get(hellcreek, addr, &entry);
899 if (ret) {
900 /* Not found */
901 dev_err(hellcreek->dev, "FDB entry for deletion not found!\n");
902 } else {
903 /* Found */
904 ret = __hellcreek_fdb_del(hellcreek, &entry);
905 if (ret) {
906 dev_err(hellcreek->dev, "Failed to delete FDB entry!\n");
907 goto out;
908 }
909
910 entry.portmask &= ~BIT(port);
911
912 if (entry.portmask != 0x00) {
913 ret = __hellcreek_fdb_add(hellcreek, &entry);
914 if (ret) {
915 dev_err(hellcreek->dev, "Failed to add FDB entry!\n");
916 goto out;
917 }
918 }
919 }
920
921out:
922 mutex_unlock(&hellcreek->reg_lock);
923
924 return ret;
925}
926
927static int hellcreek_fdb_dump(struct dsa_switch *ds, int port,
928 dsa_fdb_dump_cb_t *cb, void *data)
929{
930 struct hellcreek *hellcreek = ds->priv;
931 u16 entries;
932 int ret = 0;
933 size_t i;
934
935 mutex_lock(&hellcreek->reg_lock);
936
937 /* Set read pointer to zero: The read of HR_FDBMAX (read-only register)
938 * should reset the internal pointer. But, that doesn't work. The vendor
939 * suggested a subsequent write as workaround. Same for HR_FDBRDH below.
940 */
941 entries = hellcreek_read(hellcreek, HR_FDBMAX);
942 hellcreek_write(hellcreek, 0x00, HR_FDBMAX);
943
944 dev_dbg(hellcreek->dev, "FDB dump for port %d, entries=%d!\n", port, entries);
945
946 /* Read table */
947 for (i = 0; i < hellcreek->fdb_entries; ++i) {
948 struct hellcreek_fdb_entry entry = { 0 };
949
950 /* Read entry */
951 hellcreek_populate_fdb_entry(hellcreek, &entry, i);
952
953 /* Force next entry */
954 hellcreek_write(hellcreek, 0x00, HR_FDBRDH);
955
956 /* Check valid */
957 if (is_zero_ether_addr(entry.mac))
958 continue;
959
960 /* Check port mask */
961 if (!(entry.portmask & BIT(port)))
962 continue;
963
964 ret = cb(entry.mac, 0, entry.is_static, data);
965 if (ret)
966 break;
967 }
968
969 mutex_unlock(&hellcreek->reg_lock);
970
971 return ret;
972}
973
974static int hellcreek_vlan_filtering(struct dsa_switch *ds, int port,
975 bool vlan_filtering,
976 struct netlink_ext_ack *extack)
977{
978 struct hellcreek *hellcreek = ds->priv;
979
980 dev_dbg(hellcreek->dev, "%s VLAN filtering on port %d\n",
981 vlan_filtering ? "Enable" : "Disable", port);
982
983 /* Configure port to drop packages with not known vids */
984 hellcreek_setup_ingressflt(hellcreek, port, vlan_filtering);
985
986 /* Enable VLAN awareness on the switch. This save due to
987 * ds->vlan_filtering_is_global.
988 */
989 hellcreek_setup_vlan_awareness(hellcreek, vlan_filtering);
990
991 return 0;
992}
993
994static int hellcreek_enable_ip_core(struct hellcreek *hellcreek)
995{
996 int ret;
997 u16 val;
998
999 mutex_lock(&hellcreek->reg_lock);
1000
1001 val = hellcreek_read(hellcreek, HR_CTRL_C);
1002 val |= HR_CTRL_C_ENABLE;
1003 hellcreek_write(hellcreek, val, HR_CTRL_C);
1004 ret = hellcreek_wait_until_transitioned(hellcreek);
1005
1006 mutex_unlock(&hellcreek->reg_lock);
1007
1008 return ret;
1009}
1010
1011static void hellcreek_setup_cpu_and_tunnel_port(struct hellcreek *hellcreek)
1012{
1013 struct hellcreek_port *tunnel_port = &hellcreek->ports[TUNNEL_PORT];
1014 struct hellcreek_port *cpu_port = &hellcreek->ports[CPU_PORT];
1015 u16 ptcfg = 0;
1016
1017 ptcfg |= HR_PTCFG_LEARNING_EN | HR_PTCFG_ADMIN_EN;
1018
1019 mutex_lock(&hellcreek->reg_lock);
1020
1021 hellcreek_select_port(hellcreek, CPU_PORT);
1022 hellcreek_write(hellcreek, ptcfg, HR_PTCFG);
1023
1024 hellcreek_select_port(hellcreek, TUNNEL_PORT);
1025 hellcreek_write(hellcreek, ptcfg, HR_PTCFG);
1026
1027 cpu_port->ptcfg = ptcfg;
1028 tunnel_port->ptcfg = ptcfg;
1029
1030 mutex_unlock(&hellcreek->reg_lock);
1031}
1032
1033static void hellcreek_setup_tc_identity_mapping(struct hellcreek *hellcreek)
1034{
1035 int i;
1036
1037 /* The switch has multiple egress queues per port. The queue is selected
1038 * via the PCP field in the VLAN header. The switch internally deals
1039 * with traffic classes instead of PCP values and this mapping is
1040 * configurable.
1041 *
1042 * The default mapping is (PCP - TC):
1043 * 7 - 7
1044 * 6 - 6
1045 * 5 - 5
1046 * 4 - 4
1047 * 3 - 3
1048 * 2 - 1
1049 * 1 - 0
1050 * 0 - 2
1051 *
1052 * The default should be an identity mapping.
1053 */
1054
1055 for (i = 0; i < 8; ++i) {
1056 mutex_lock(&hellcreek->reg_lock);
1057
1058 hellcreek_select_prio(hellcreek, i);
1059 hellcreek_write(hellcreek,
1060 i << HR_PRTCCFG_PCP_TC_MAP_SHIFT,
1061 HR_PRTCCFG);
1062
1063 mutex_unlock(&hellcreek->reg_lock);
1064 }
1065}
1066
1067static int hellcreek_setup_fdb(struct hellcreek *hellcreek)
1068{
1069 static struct hellcreek_fdb_entry l2_ptp = {
1070 /* MAC: 01-1B-19-00-00-00 */
1071 .mac = { 0x01, 0x1b, 0x19, 0x00, 0x00, 0x00 },
1072 .portmask = 0x03, /* Management ports */
1073 .age = 0,
1074 .is_obt = 0,
1075 .pass_blocked = 0,
1076 .is_static = 1,
1077 .reprio_tc = 6, /* TC: 6 as per IEEE 802.1AS */
1078 .reprio_en = 1,
1079 };
1080 static struct hellcreek_fdb_entry udp4_ptp = {
1081 /* MAC: 01-00-5E-00-01-81 */
1082 .mac = { 0x01, 0x00, 0x5e, 0x00, 0x01, 0x81 },
1083 .portmask = 0x03, /* Management ports */
1084 .age = 0,
1085 .is_obt = 0,
1086 .pass_blocked = 0,
1087 .is_static = 1,
1088 .reprio_tc = 6,
1089 .reprio_en = 1,
1090 };
1091 static struct hellcreek_fdb_entry udp6_ptp = {
1092 /* MAC: 33-33-00-00-01-81 */
1093 .mac = { 0x33, 0x33, 0x00, 0x00, 0x01, 0x81 },
1094 .portmask = 0x03, /* Management ports */
1095 .age = 0,
1096 .is_obt = 0,
1097 .pass_blocked = 0,
1098 .is_static = 1,
1099 .reprio_tc = 6,
1100 .reprio_en = 1,
1101 };
1102 static struct hellcreek_fdb_entry l2_p2p = {
1103 /* MAC: 01-80-C2-00-00-0E */
1104 .mac = { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x0e },
1105 .portmask = 0x03, /* Management ports */
1106 .age = 0,
1107 .is_obt = 0,
1108 .pass_blocked = 1,
1109 .is_static = 1,
1110 .reprio_tc = 6, /* TC: 6 as per IEEE 802.1AS */
1111 .reprio_en = 1,
1112 };
1113 static struct hellcreek_fdb_entry udp4_p2p = {
1114 /* MAC: 01-00-5E-00-00-6B */
1115 .mac = { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x6b },
1116 .portmask = 0x03, /* Management ports */
1117 .age = 0,
1118 .is_obt = 0,
1119 .pass_blocked = 1,
1120 .is_static = 1,
1121 .reprio_tc = 6,
1122 .reprio_en = 1,
1123 };
1124 static struct hellcreek_fdb_entry udp6_p2p = {
1125 /* MAC: 33-33-00-00-00-6B */
1126 .mac = { 0x33, 0x33, 0x00, 0x00, 0x00, 0x6b },
1127 .portmask = 0x03, /* Management ports */
1128 .age = 0,
1129 .is_obt = 0,
1130 .pass_blocked = 1,
1131 .is_static = 1,
1132 .reprio_tc = 6,
1133 .reprio_en = 1,
1134 };
1135 static struct hellcreek_fdb_entry stp = {
1136 /* MAC: 01-80-C2-00-00-00 */
1137 .mac = { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x00 },
1138 .portmask = 0x03, /* Management ports */
1139 .age = 0,
1140 .is_obt = 0,
1141 .pass_blocked = 1,
1142 .is_static = 1,
1143 .reprio_tc = 6,
1144 .reprio_en = 1,
1145 };
1146 int ret;
1147
1148 mutex_lock(&hellcreek->reg_lock);
1149 ret = __hellcreek_fdb_add(hellcreek, &l2_ptp);
1150 if (ret)
1151 goto out;
1152 ret = __hellcreek_fdb_add(hellcreek, &udp4_ptp);
1153 if (ret)
1154 goto out;
1155 ret = __hellcreek_fdb_add(hellcreek, &udp6_ptp);
1156 if (ret)
1157 goto out;
1158 ret = __hellcreek_fdb_add(hellcreek, &l2_p2p);
1159 if (ret)
1160 goto out;
1161 ret = __hellcreek_fdb_add(hellcreek, &udp4_p2p);
1162 if (ret)
1163 goto out;
1164 ret = __hellcreek_fdb_add(hellcreek, &udp6_p2p);
1165 if (ret)
1166 goto out;
1167 ret = __hellcreek_fdb_add(hellcreek, &stp);
1168out:
1169 mutex_unlock(&hellcreek->reg_lock);
1170
1171 return ret;
1172}
1173
1174static int hellcreek_devlink_info_get(struct dsa_switch *ds,
1175 struct devlink_info_req *req,
1176 struct netlink_ext_ack *extack)
1177{
1178 struct hellcreek *hellcreek = ds->priv;
1179
1180 return devlink_info_version_fixed_put(req,
1181 DEVLINK_INFO_VERSION_GENERIC_ASIC_ID,
1182 hellcreek->pdata->name);
1183}
1184
1185static u64 hellcreek_devlink_vlan_table_get(void *priv)
1186{
1187 struct hellcreek *hellcreek = priv;
1188 u64 count = 0;
1189 int i;
1190
1191 mutex_lock(&hellcreek->reg_lock);
1192 for (i = 0; i < VLAN_N_VID; ++i)
1193 if (hellcreek->vidmbrcfg[i])
1194 count++;
1195 mutex_unlock(&hellcreek->reg_lock);
1196
1197 return count;
1198}
1199
1200static u64 hellcreek_devlink_fdb_table_get(void *priv)
1201{
1202 struct hellcreek *hellcreek = priv;
1203 u64 count = 0;
1204
1205 /* Reading this register has side effects. Synchronize against the other
1206 * FDB operations.
1207 */
1208 mutex_lock(&hellcreek->reg_lock);
1209 count = hellcreek_read(hellcreek, HR_FDBMAX);
1210 mutex_unlock(&hellcreek->reg_lock);
1211
1212 return count;
1213}
1214
1215static int hellcreek_setup_devlink_resources(struct dsa_switch *ds)
1216{
1217 struct devlink_resource_size_params size_vlan_params;
1218 struct devlink_resource_size_params size_fdb_params;
1219 struct hellcreek *hellcreek = ds->priv;
1220 int err;
1221
1222 devlink_resource_size_params_init(&size_vlan_params, VLAN_N_VID,
1223 VLAN_N_VID,
1224 1, DEVLINK_RESOURCE_UNIT_ENTRY);
1225
1226 devlink_resource_size_params_init(&size_fdb_params,
1227 hellcreek->fdb_entries,
1228 hellcreek->fdb_entries,
1229 1, DEVLINK_RESOURCE_UNIT_ENTRY);
1230
1231 err = dsa_devlink_resource_register(ds, "VLAN", VLAN_N_VID,
1232 HELLCREEK_DEVLINK_PARAM_ID_VLAN_TABLE,
1233 DEVLINK_RESOURCE_ID_PARENT_TOP,
1234 &size_vlan_params);
1235 if (err)
1236 goto out;
1237
1238 err = dsa_devlink_resource_register(ds, "FDB", hellcreek->fdb_entries,
1239 HELLCREEK_DEVLINK_PARAM_ID_FDB_TABLE,
1240 DEVLINK_RESOURCE_ID_PARENT_TOP,
1241 &size_fdb_params);
1242 if (err)
1243 goto out;
1244
1245 dsa_devlink_resource_occ_get_register(ds,
1246 HELLCREEK_DEVLINK_PARAM_ID_VLAN_TABLE,
1247 hellcreek_devlink_vlan_table_get,
1248 hellcreek);
1249
1250 dsa_devlink_resource_occ_get_register(ds,
1251 HELLCREEK_DEVLINK_PARAM_ID_FDB_TABLE,
1252 hellcreek_devlink_fdb_table_get,
1253 hellcreek);
1254
1255 return 0;
1256
1257out:
1258 dsa_devlink_resources_unregister(ds);
1259
1260 return err;
1261}
1262
1263static int hellcreek_devlink_region_vlan_snapshot(struct devlink *dl,
1264 const struct devlink_region_ops *ops,
1265 struct netlink_ext_ack *extack,
1266 u8 **data)
1267{
1268 struct hellcreek_devlink_vlan_entry *table, *entry;
1269 struct dsa_switch *ds = dsa_devlink_to_ds(dl);
1270 struct hellcreek *hellcreek = ds->priv;
1271 int i;
1272
1273 table = kcalloc(VLAN_N_VID, sizeof(*entry), GFP_KERNEL);
1274 if (!table)
1275 return -ENOMEM;
1276
1277 entry = table;
1278
1279 mutex_lock(&hellcreek->reg_lock);
1280 for (i = 0; i < VLAN_N_VID; ++i, ++entry) {
1281 entry->member = hellcreek->vidmbrcfg[i];
1282 entry->vid = i;
1283 }
1284 mutex_unlock(&hellcreek->reg_lock);
1285
1286 *data = (u8 *)table;
1287
1288 return 0;
1289}
1290
1291static int hellcreek_devlink_region_fdb_snapshot(struct devlink *dl,
1292 const struct devlink_region_ops *ops,
1293 struct netlink_ext_ack *extack,
1294 u8 **data)
1295{
1296 struct dsa_switch *ds = dsa_devlink_to_ds(dl);
1297 struct hellcreek_fdb_entry *table, *entry;
1298 struct hellcreek *hellcreek = ds->priv;
1299 size_t i;
1300
1301 table = kcalloc(hellcreek->fdb_entries, sizeof(*entry), GFP_KERNEL);
1302 if (!table)
1303 return -ENOMEM;
1304
1305 entry = table;
1306
1307 mutex_lock(&hellcreek->reg_lock);
1308
1309 /* Start table read */
1310 hellcreek_read(hellcreek, HR_FDBMAX);
1311 hellcreek_write(hellcreek, 0x00, HR_FDBMAX);
1312
1313 for (i = 0; i < hellcreek->fdb_entries; ++i, ++entry) {
1314 /* Read current entry */
1315 hellcreek_populate_fdb_entry(hellcreek, entry, i);
1316
1317 /* Advance read pointer */
1318 hellcreek_write(hellcreek, 0x00, HR_FDBRDH);
1319 }
1320
1321 mutex_unlock(&hellcreek->reg_lock);
1322
1323 *data = (u8 *)table;
1324
1325 return 0;
1326}
1327
1328static struct devlink_region_ops hellcreek_region_vlan_ops = {
1329 .name = "vlan",
1330 .snapshot = hellcreek_devlink_region_vlan_snapshot,
1331 .destructor = kfree,
1332};
1333
1334static struct devlink_region_ops hellcreek_region_fdb_ops = {
1335 .name = "fdb",
1336 .snapshot = hellcreek_devlink_region_fdb_snapshot,
1337 .destructor = kfree,
1338};
1339
1340static int hellcreek_setup_devlink_regions(struct dsa_switch *ds)
1341{
1342 struct hellcreek *hellcreek = ds->priv;
1343 struct devlink_region_ops *ops;
1344 struct devlink_region *region;
1345 u64 size;
1346 int ret;
1347
1348 /* VLAN table */
1349 size = VLAN_N_VID * sizeof(struct hellcreek_devlink_vlan_entry);
1350 ops = &hellcreek_region_vlan_ops;
1351
1352 region = dsa_devlink_region_create(ds, ops, 1, size);
1353 if (IS_ERR(region))
1354 return PTR_ERR(region);
1355
1356 hellcreek->vlan_region = region;
1357
1358 /* FDB table */
1359 size = hellcreek->fdb_entries * sizeof(struct hellcreek_fdb_entry);
1360 ops = &hellcreek_region_fdb_ops;
1361
1362 region = dsa_devlink_region_create(ds, ops, 1, size);
1363 if (IS_ERR(region)) {
1364 ret = PTR_ERR(region);
1365 goto err_fdb;
1366 }
1367
1368 hellcreek->fdb_region = region;
1369
1370 return 0;
1371
1372err_fdb:
1373 dsa_devlink_region_destroy(hellcreek->vlan_region);
1374
1375 return ret;
1376}
1377
1378static void hellcreek_teardown_devlink_regions(struct dsa_switch *ds)
1379{
1380 struct hellcreek *hellcreek = ds->priv;
1381
1382 dsa_devlink_region_destroy(hellcreek->fdb_region);
1383 dsa_devlink_region_destroy(hellcreek->vlan_region);
1384}
1385
1386static int hellcreek_setup(struct dsa_switch *ds)
1387{
1388 struct hellcreek *hellcreek = ds->priv;
1389 u16 swcfg = 0;
1390 int ret, i;
1391
1392 dev_dbg(hellcreek->dev, "Set up the switch\n");
1393
1394 /* Let's go */
1395 ret = hellcreek_enable_ip_core(hellcreek);
1396 if (ret) {
1397 dev_err(hellcreek->dev, "Failed to enable IP core!\n");
1398 return ret;
1399 }
1400
1401 /* Enable CPU/Tunnel ports */
1402 hellcreek_setup_cpu_and_tunnel_port(hellcreek);
1403
1404 /* Switch config: Keep defaults, enable FDB aging and learning and tag
1405 * each frame from/to cpu port for DSA tagging. Also enable the length
1406 * aware shaping mode. This eliminates the need for Qbv guard bands.
1407 */
1408 swcfg |= HR_SWCFG_FDBAGE_EN |
1409 HR_SWCFG_FDBLRN_EN |
1410 HR_SWCFG_ALWAYS_OBT |
1411 (HR_SWCFG_LAS_ON << HR_SWCFG_LAS_MODE_SHIFT);
1412 hellcreek->swcfg = swcfg;
1413 hellcreek_write(hellcreek, swcfg, HR_SWCFG);
1414
1415 /* Initial vlan membership to reflect port separation */
1416 for (i = 0; i < ds->num_ports; ++i) {
1417 if (!dsa_is_user_port(ds, i))
1418 continue;
1419
1420 hellcreek_setup_vlan_membership(ds, i, true);
1421 }
1422
1423 /* Configure PCP <-> TC mapping */
1424 hellcreek_setup_tc_identity_mapping(hellcreek);
1425
1426 /* The VLAN awareness is a global switch setting. Therefore, mixed vlan
1427 * filtering setups are not supported.
1428 */
1429 ds->vlan_filtering_is_global = true;
1430 ds->needs_standalone_vlan_filtering = true;
1431
1432 /* Intercept _all_ PTP multicast traffic */
1433 ret = hellcreek_setup_fdb(hellcreek);
1434 if (ret) {
1435 dev_err(hellcreek->dev,
1436 "Failed to insert static PTP FDB entries\n");
1437 return ret;
1438 }
1439
1440 /* Register devlink resources with DSA */
1441 ret = hellcreek_setup_devlink_resources(ds);
1442 if (ret) {
1443 dev_err(hellcreek->dev,
1444 "Failed to setup devlink resources!\n");
1445 return ret;
1446 }
1447
1448 ret = hellcreek_setup_devlink_regions(ds);
1449 if (ret) {
1450 dev_err(hellcreek->dev,
1451 "Failed to setup devlink regions!\n");
1452 goto err_regions;
1453 }
1454
1455 return 0;
1456
1457err_regions:
1458 dsa_devlink_resources_unregister(ds);
1459
1460 return ret;
1461}
1462
1463static void hellcreek_teardown(struct dsa_switch *ds)
1464{
1465 hellcreek_teardown_devlink_regions(ds);
1466 dsa_devlink_resources_unregister(ds);
1467}
1468
1469static void hellcreek_phylink_get_caps(struct dsa_switch *ds, int port,
1470 struct phylink_config *config)
1471{
1472 struct hellcreek *hellcreek = ds->priv;
1473
1474 __set_bit(PHY_INTERFACE_MODE_MII, config->supported_interfaces);
1475 __set_bit(PHY_INTERFACE_MODE_RGMII, config->supported_interfaces);
1476
1477 /* Include GMII - the hardware does not support this interface
1478 * mode, but it's the default interface mode for phylib, so we
1479 * need it for compatibility with existing DT.
1480 */
1481 __set_bit(PHY_INTERFACE_MODE_GMII, config->supported_interfaces);
1482
1483 /* The MAC settings are a hardware configuration option and cannot be
1484 * changed at run time or by strapping. Therefore the attached PHYs
1485 * should be programmed to only advertise settings which are supported
1486 * by the hardware.
1487 */
1488 if (hellcreek->pdata->is_100_mbits)
1489 config->mac_capabilities = MAC_100FD;
1490 else
1491 config->mac_capabilities = MAC_1000FD;
1492}
1493
1494static int
1495hellcreek_port_prechangeupper(struct dsa_switch *ds, int port,
1496 struct netdev_notifier_changeupper_info *info)
1497{
1498 struct hellcreek *hellcreek = ds->priv;
1499 bool used = true;
1500 int ret = -EBUSY;
1501 u16 vid;
1502 int i;
1503
1504 dev_dbg(hellcreek->dev, "Pre change upper for port %d\n", port);
1505
1506 /*
1507 * Deny VLAN devices on top of lan ports with the same VLAN ids, because
1508 * it breaks the port separation due to the private VLANs. Example:
1509 *
1510 * lan0.100 *and* lan1.100 cannot be used in parallel. However, lan0.99
1511 * and lan1.100 works.
1512 */
1513
1514 if (!is_vlan_dev(info->upper_dev))
1515 return 0;
1516
1517 vid = vlan_dev_vlan_id(info->upper_dev);
1518
1519 /* For all ports, check bitmaps */
1520 mutex_lock(&hellcreek->vlan_lock);
1521 for (i = 0; i < hellcreek->pdata->num_ports; ++i) {
1522 if (!dsa_is_user_port(ds, i))
1523 continue;
1524
1525 if (port == i)
1526 continue;
1527
1528 used = used && test_bit(vid, hellcreek->ports[i].vlan_dev_bitmap);
1529 }
1530
1531 if (used)
1532 goto out;
1533
1534 /* Update bitmap */
1535 set_bit(vid, hellcreek->ports[port].vlan_dev_bitmap);
1536
1537 ret = 0;
1538
1539out:
1540 mutex_unlock(&hellcreek->vlan_lock);
1541
1542 return ret;
1543}
1544
1545static void hellcreek_setup_maxsdu(struct hellcreek *hellcreek, int port,
1546 const struct tc_taprio_qopt_offload *schedule)
1547{
1548 int tc;
1549
1550 for (tc = 0; tc < 8; ++tc) {
1551 u32 max_sdu = schedule->max_sdu[tc] + VLAN_ETH_HLEN - ETH_FCS_LEN;
1552 u16 val;
1553
1554 if (!schedule->max_sdu[tc])
1555 continue;
1556
1557 dev_dbg(hellcreek->dev, "Configure max-sdu %u for tc %d on port %d\n",
1558 max_sdu, tc, port);
1559
1560 hellcreek_select_port_prio(hellcreek, port, tc);
1561
1562 val = (max_sdu & HR_PTPRTCCFG_MAXSDU_MASK) << HR_PTPRTCCFG_MAXSDU_SHIFT;
1563
1564 hellcreek_write(hellcreek, val, HR_PTPRTCCFG);
1565 }
1566}
1567
1568static void hellcreek_reset_maxsdu(struct hellcreek *hellcreek, int port)
1569{
1570 int tc;
1571
1572 for (tc = 0; tc < 8; ++tc) {
1573 u16 val;
1574
1575 hellcreek_select_port_prio(hellcreek, port, tc);
1576
1577 val = (HELLCREEK_DEFAULT_MAX_SDU & HR_PTPRTCCFG_MAXSDU_MASK)
1578 << HR_PTPRTCCFG_MAXSDU_SHIFT;
1579
1580 hellcreek_write(hellcreek, val, HR_PTPRTCCFG);
1581 }
1582}
1583
1584static void hellcreek_setup_gcl(struct hellcreek *hellcreek, int port,
1585 const struct tc_taprio_qopt_offload *schedule)
1586{
1587 const struct tc_taprio_sched_entry *cur, *initial, *next;
1588 size_t i;
1589
1590 cur = initial = &schedule->entries[0];
1591 next = cur + 1;
1592
1593 for (i = 1; i <= schedule->num_entries; ++i) {
1594 u16 data;
1595 u8 gates;
1596
1597 if (i == schedule->num_entries)
1598 gates = initial->gate_mask ^
1599 cur->gate_mask;
1600 else
1601 gates = next->gate_mask ^
1602 cur->gate_mask;
1603
1604 data = gates;
1605
1606 if (i == schedule->num_entries)
1607 data |= TR_GCLDAT_GCLWRLAST;
1608
1609 /* Gates states */
1610 hellcreek_write(hellcreek, data, TR_GCLDAT);
1611
1612 /* Time interval */
1613 hellcreek_write(hellcreek,
1614 cur->interval & 0x0000ffff,
1615 TR_GCLTIL);
1616 hellcreek_write(hellcreek,
1617 (cur->interval & 0xffff0000) >> 16,
1618 TR_GCLTIH);
1619
1620 /* Commit entry */
1621 data = ((i - 1) << TR_GCLCMD_GCLWRADR_SHIFT) |
1622 (initial->gate_mask <<
1623 TR_GCLCMD_INIT_GATE_STATES_SHIFT);
1624 hellcreek_write(hellcreek, data, TR_GCLCMD);
1625
1626 cur++;
1627 next++;
1628 }
1629}
1630
1631static void hellcreek_set_cycle_time(struct hellcreek *hellcreek,
1632 const struct tc_taprio_qopt_offload *schedule)
1633{
1634 u32 cycle_time = schedule->cycle_time;
1635
1636 hellcreek_write(hellcreek, cycle_time & 0x0000ffff, TR_CTWRL);
1637 hellcreek_write(hellcreek, (cycle_time & 0xffff0000) >> 16, TR_CTWRH);
1638}
1639
1640static void hellcreek_switch_schedule(struct hellcreek *hellcreek,
1641 ktime_t start_time)
1642{
1643 struct timespec64 ts = ktime_to_timespec64(start_time);
1644
1645 /* Start schedule at this point of time */
1646 hellcreek_write(hellcreek, ts.tv_nsec & 0x0000ffff, TR_ESTWRL);
1647 hellcreek_write(hellcreek, (ts.tv_nsec & 0xffff0000) >> 16, TR_ESTWRH);
1648
1649 /* Arm timer, set seconds and switch schedule */
1650 hellcreek_write(hellcreek, TR_ESTCMD_ESTARM | TR_ESTCMD_ESTSWCFG |
1651 ((ts.tv_sec & TR_ESTCMD_ESTSEC_MASK) <<
1652 TR_ESTCMD_ESTSEC_SHIFT), TR_ESTCMD);
1653}
1654
1655static bool hellcreek_schedule_startable(struct hellcreek *hellcreek, int port)
1656{
1657 struct hellcreek_port *hellcreek_port = &hellcreek->ports[port];
1658 s64 base_time_ns, current_ns;
1659
1660 /* The switch allows a schedule to be started only eight seconds within
1661 * the future. Therefore, check the current PTP time if the schedule is
1662 * startable or not.
1663 */
1664
1665 /* Use the "cached" time. That should be alright, as it's updated quite
1666 * frequently in the PTP code.
1667 */
1668 mutex_lock(&hellcreek->ptp_lock);
1669 current_ns = hellcreek->seconds * NSEC_PER_SEC + hellcreek->last_ts;
1670 mutex_unlock(&hellcreek->ptp_lock);
1671
1672 /* Calculate difference to admin base time */
1673 base_time_ns = ktime_to_ns(hellcreek_port->current_schedule->base_time);
1674
1675 return base_time_ns - current_ns < (s64)4 * NSEC_PER_SEC;
1676}
1677
1678static void hellcreek_start_schedule(struct hellcreek *hellcreek, int port)
1679{
1680 struct hellcreek_port *hellcreek_port = &hellcreek->ports[port];
1681 ktime_t base_time, current_time;
1682 s64 current_ns;
1683 u32 cycle_time;
1684
1685 /* First select port */
1686 hellcreek_select_tgd(hellcreek, port);
1687
1688 /* Forward base time into the future if needed */
1689 mutex_lock(&hellcreek->ptp_lock);
1690 current_ns = hellcreek->seconds * NSEC_PER_SEC + hellcreek->last_ts;
1691 mutex_unlock(&hellcreek->ptp_lock);
1692
1693 current_time = ns_to_ktime(current_ns);
1694 base_time = hellcreek_port->current_schedule->base_time;
1695 cycle_time = hellcreek_port->current_schedule->cycle_time;
1696
1697 if (ktime_compare(current_time, base_time) > 0) {
1698 s64 n;
1699
1700 n = div64_s64(ktime_sub_ns(current_time, base_time),
1701 cycle_time);
1702 base_time = ktime_add_ns(base_time, (n + 1) * cycle_time);
1703 }
1704
1705 /* Set admin base time and switch schedule */
1706 hellcreek_switch_schedule(hellcreek, base_time);
1707
1708 taprio_offload_free(hellcreek_port->current_schedule);
1709 hellcreek_port->current_schedule = NULL;
1710
1711 dev_dbg(hellcreek->dev, "Armed EST timer for port %d\n",
1712 hellcreek_port->port);
1713}
1714
1715static void hellcreek_check_schedule(struct work_struct *work)
1716{
1717 struct delayed_work *dw = to_delayed_work(work);
1718 struct hellcreek_port *hellcreek_port;
1719 struct hellcreek *hellcreek;
1720 bool startable;
1721
1722 hellcreek_port = dw_to_hellcreek_port(dw);
1723 hellcreek = hellcreek_port->hellcreek;
1724
1725 mutex_lock(&hellcreek->reg_lock);
1726
1727 /* Check starting time */
1728 startable = hellcreek_schedule_startable(hellcreek,
1729 hellcreek_port->port);
1730 if (startable) {
1731 hellcreek_start_schedule(hellcreek, hellcreek_port->port);
1732 mutex_unlock(&hellcreek->reg_lock);
1733 return;
1734 }
1735
1736 mutex_unlock(&hellcreek->reg_lock);
1737
1738 /* Reschedule */
1739 schedule_delayed_work(&hellcreek_port->schedule_work,
1740 HELLCREEK_SCHEDULE_PERIOD);
1741}
1742
1743static int hellcreek_port_set_schedule(struct dsa_switch *ds, int port,
1744 struct tc_taprio_qopt_offload *taprio)
1745{
1746 struct hellcreek *hellcreek = ds->priv;
1747 struct hellcreek_port *hellcreek_port;
1748 bool startable;
1749 u16 ctrl;
1750
1751 hellcreek_port = &hellcreek->ports[port];
1752
1753 dev_dbg(hellcreek->dev, "Configure traffic schedule on port %d\n",
1754 port);
1755
1756 /* First cancel delayed work */
1757 cancel_delayed_work_sync(&hellcreek_port->schedule_work);
1758
1759 mutex_lock(&hellcreek->reg_lock);
1760
1761 if (hellcreek_port->current_schedule) {
1762 taprio_offload_free(hellcreek_port->current_schedule);
1763 hellcreek_port->current_schedule = NULL;
1764 }
1765 hellcreek_port->current_schedule = taprio_offload_get(taprio);
1766
1767 /* Configure max sdu */
1768 hellcreek_setup_maxsdu(hellcreek, port, hellcreek_port->current_schedule);
1769
1770 /* Select tdg */
1771 hellcreek_select_tgd(hellcreek, port);
1772
1773 /* Enable gating and keep defaults */
1774 ctrl = (0xff << TR_TGDCTRL_ADMINGATESTATES_SHIFT) | TR_TGDCTRL_GATE_EN;
1775 hellcreek_write(hellcreek, ctrl, TR_TGDCTRL);
1776
1777 /* Cancel pending schedule */
1778 hellcreek_write(hellcreek, 0x00, TR_ESTCMD);
1779
1780 /* Setup a new schedule */
1781 hellcreek_setup_gcl(hellcreek, port, hellcreek_port->current_schedule);
1782
1783 /* Configure cycle time */
1784 hellcreek_set_cycle_time(hellcreek, hellcreek_port->current_schedule);
1785
1786 /* Check starting time */
1787 startable = hellcreek_schedule_startable(hellcreek, port);
1788 if (startable) {
1789 hellcreek_start_schedule(hellcreek, port);
1790 mutex_unlock(&hellcreek->reg_lock);
1791 return 0;
1792 }
1793
1794 mutex_unlock(&hellcreek->reg_lock);
1795
1796 /* Schedule periodic schedule check */
1797 schedule_delayed_work(&hellcreek_port->schedule_work,
1798 HELLCREEK_SCHEDULE_PERIOD);
1799
1800 return 0;
1801}
1802
1803static int hellcreek_port_del_schedule(struct dsa_switch *ds, int port)
1804{
1805 struct hellcreek *hellcreek = ds->priv;
1806 struct hellcreek_port *hellcreek_port;
1807
1808 hellcreek_port = &hellcreek->ports[port];
1809
1810 dev_dbg(hellcreek->dev, "Remove traffic schedule on port %d\n", port);
1811
1812 /* First cancel delayed work */
1813 cancel_delayed_work_sync(&hellcreek_port->schedule_work);
1814
1815 mutex_lock(&hellcreek->reg_lock);
1816
1817 if (hellcreek_port->current_schedule) {
1818 taprio_offload_free(hellcreek_port->current_schedule);
1819 hellcreek_port->current_schedule = NULL;
1820 }
1821
1822 /* Reset max sdu */
1823 hellcreek_reset_maxsdu(hellcreek, port);
1824
1825 /* Select tgd */
1826 hellcreek_select_tgd(hellcreek, port);
1827
1828 /* Disable gating and return to regular switching flow */
1829 hellcreek_write(hellcreek, 0xff << TR_TGDCTRL_ADMINGATESTATES_SHIFT,
1830 TR_TGDCTRL);
1831
1832 mutex_unlock(&hellcreek->reg_lock);
1833
1834 return 0;
1835}
1836
1837static bool hellcreek_validate_schedule(struct hellcreek *hellcreek,
1838 struct tc_taprio_qopt_offload *schedule)
1839{
1840 size_t i;
1841
1842 /* Does this hellcreek version support Qbv in hardware? */
1843 if (!hellcreek->pdata->qbv_support)
1844 return false;
1845
1846 /* cycle time can only be 32bit */
1847 if (schedule->cycle_time > (u32)-1)
1848 return false;
1849
1850 /* cycle time extension is not supported */
1851 if (schedule->cycle_time_extension)
1852 return false;
1853
1854 /* Only set command is supported */
1855 for (i = 0; i < schedule->num_entries; ++i)
1856 if (schedule->entries[i].command != TC_TAPRIO_CMD_SET_GATES)
1857 return false;
1858
1859 return true;
1860}
1861
1862static int hellcreek_tc_query_caps(struct tc_query_caps_base *base)
1863{
1864 switch (base->type) {
1865 case TC_SETUP_QDISC_TAPRIO: {
1866 struct tc_taprio_caps *caps = base->caps;
1867
1868 caps->supports_queue_max_sdu = true;
1869
1870 return 0;
1871 }
1872 default:
1873 return -EOPNOTSUPP;
1874 }
1875}
1876
1877static int hellcreek_port_setup_tc(struct dsa_switch *ds, int port,
1878 enum tc_setup_type type, void *type_data)
1879{
1880 struct hellcreek *hellcreek = ds->priv;
1881
1882 switch (type) {
1883 case TC_QUERY_CAPS:
1884 return hellcreek_tc_query_caps(type_data);
1885 case TC_SETUP_QDISC_TAPRIO: {
1886 struct tc_taprio_qopt_offload *taprio = type_data;
1887
1888 if (!hellcreek_validate_schedule(hellcreek, taprio))
1889 return -EOPNOTSUPP;
1890
1891 if (taprio->enable)
1892 return hellcreek_port_set_schedule(ds, port, taprio);
1893
1894 return hellcreek_port_del_schedule(ds, port);
1895 }
1896 default:
1897 return -EOPNOTSUPP;
1898 }
1899}
1900
1901static const struct dsa_switch_ops hellcreek_ds_ops = {
1902 .devlink_info_get = hellcreek_devlink_info_get,
1903 .get_ethtool_stats = hellcreek_get_ethtool_stats,
1904 .get_sset_count = hellcreek_get_sset_count,
1905 .get_strings = hellcreek_get_strings,
1906 .get_tag_protocol = hellcreek_get_tag_protocol,
1907 .get_ts_info = hellcreek_get_ts_info,
1908 .phylink_get_caps = hellcreek_phylink_get_caps,
1909 .port_bridge_flags = hellcreek_bridge_flags,
1910 .port_bridge_join = hellcreek_port_bridge_join,
1911 .port_bridge_leave = hellcreek_port_bridge_leave,
1912 .port_disable = hellcreek_port_disable,
1913 .port_enable = hellcreek_port_enable,
1914 .port_fdb_add = hellcreek_fdb_add,
1915 .port_fdb_del = hellcreek_fdb_del,
1916 .port_fdb_dump = hellcreek_fdb_dump,
1917 .port_hwtstamp_set = hellcreek_port_hwtstamp_set,
1918 .port_hwtstamp_get = hellcreek_port_hwtstamp_get,
1919 .port_pre_bridge_flags = hellcreek_pre_bridge_flags,
1920 .port_prechangeupper = hellcreek_port_prechangeupper,
1921 .port_rxtstamp = hellcreek_port_rxtstamp,
1922 .port_setup_tc = hellcreek_port_setup_tc,
1923 .port_stp_state_set = hellcreek_port_stp_state_set,
1924 .port_txtstamp = hellcreek_port_txtstamp,
1925 .port_vlan_add = hellcreek_vlan_add,
1926 .port_vlan_del = hellcreek_vlan_del,
1927 .port_vlan_filtering = hellcreek_vlan_filtering,
1928 .setup = hellcreek_setup,
1929 .teardown = hellcreek_teardown,
1930};
1931
1932static int hellcreek_probe(struct platform_device *pdev)
1933{
1934 struct device *dev = &pdev->dev;
1935 struct hellcreek *hellcreek;
1936 struct resource *res;
1937 int ret, i;
1938
1939 hellcreek = devm_kzalloc(dev, sizeof(*hellcreek), GFP_KERNEL);
1940 if (!hellcreek)
1941 return -ENOMEM;
1942
1943 hellcreek->vidmbrcfg = devm_kcalloc(dev, VLAN_N_VID,
1944 sizeof(*hellcreek->vidmbrcfg),
1945 GFP_KERNEL);
1946 if (!hellcreek->vidmbrcfg)
1947 return -ENOMEM;
1948
1949 hellcreek->pdata = of_device_get_match_data(dev);
1950
1951 hellcreek->ports = devm_kcalloc(dev, hellcreek->pdata->num_ports,
1952 sizeof(*hellcreek->ports),
1953 GFP_KERNEL);
1954 if (!hellcreek->ports)
1955 return -ENOMEM;
1956
1957 for (i = 0; i < hellcreek->pdata->num_ports; ++i) {
1958 struct hellcreek_port *port = &hellcreek->ports[i];
1959
1960 port->counter_values =
1961 devm_kcalloc(dev,
1962 ARRAY_SIZE(hellcreek_counter),
1963 sizeof(*port->counter_values),
1964 GFP_KERNEL);
1965 if (!port->counter_values)
1966 return -ENOMEM;
1967
1968 port->vlan_dev_bitmap = devm_bitmap_zalloc(dev, VLAN_N_VID,
1969 GFP_KERNEL);
1970 if (!port->vlan_dev_bitmap)
1971 return -ENOMEM;
1972
1973 port->hellcreek = hellcreek;
1974 port->port = i;
1975
1976 INIT_DELAYED_WORK(&port->schedule_work,
1977 hellcreek_check_schedule);
1978 }
1979
1980 mutex_init(&hellcreek->reg_lock);
1981 mutex_init(&hellcreek->vlan_lock);
1982 mutex_init(&hellcreek->ptp_lock);
1983
1984 hellcreek->dev = dev;
1985
1986 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "tsn");
1987 if (!res) {
1988 dev_err(dev, "No memory region provided!\n");
1989 return -ENODEV;
1990 }
1991
1992 hellcreek->base = devm_ioremap_resource(dev, res);
1993 if (IS_ERR(hellcreek->base))
1994 return PTR_ERR(hellcreek->base);
1995
1996 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ptp");
1997 if (!res) {
1998 dev_err(dev, "No PTP memory region provided!\n");
1999 return -ENODEV;
2000 }
2001
2002 hellcreek->ptp_base = devm_ioremap_resource(dev, res);
2003 if (IS_ERR(hellcreek->ptp_base))
2004 return PTR_ERR(hellcreek->ptp_base);
2005
2006 ret = hellcreek_detect(hellcreek);
2007 if (ret) {
2008 dev_err(dev, "No (known) chip found!\n");
2009 return ret;
2010 }
2011
2012 ret = hellcreek_wait_until_ready(hellcreek);
2013 if (ret) {
2014 dev_err(dev, "Switch didn't become ready!\n");
2015 return ret;
2016 }
2017
2018 hellcreek_feature_detect(hellcreek);
2019
2020 hellcreek->ds = devm_kzalloc(dev, sizeof(*hellcreek->ds), GFP_KERNEL);
2021 if (!hellcreek->ds)
2022 return -ENOMEM;
2023
2024 hellcreek->ds->dev = dev;
2025 hellcreek->ds->priv = hellcreek;
2026 hellcreek->ds->ops = &hellcreek_ds_ops;
2027 hellcreek->ds->num_ports = hellcreek->pdata->num_ports;
2028 hellcreek->ds->num_tx_queues = HELLCREEK_NUM_EGRESS_QUEUES;
2029
2030 ret = dsa_register_switch(hellcreek->ds);
2031 if (ret) {
2032 dev_err_probe(dev, ret, "Unable to register switch\n");
2033 return ret;
2034 }
2035
2036 ret = hellcreek_ptp_setup(hellcreek);
2037 if (ret) {
2038 dev_err(dev, "Failed to setup PTP!\n");
2039 goto err_ptp_setup;
2040 }
2041
2042 ret = hellcreek_hwtstamp_setup(hellcreek);
2043 if (ret) {
2044 dev_err(dev, "Failed to setup hardware timestamping!\n");
2045 goto err_tstamp_setup;
2046 }
2047
2048 platform_set_drvdata(pdev, hellcreek);
2049
2050 return 0;
2051
2052err_tstamp_setup:
2053 hellcreek_ptp_free(hellcreek);
2054err_ptp_setup:
2055 dsa_unregister_switch(hellcreek->ds);
2056
2057 return ret;
2058}
2059
2060static int hellcreek_remove(struct platform_device *pdev)
2061{
2062 struct hellcreek *hellcreek = platform_get_drvdata(pdev);
2063
2064 if (!hellcreek)
2065 return 0;
2066
2067 hellcreek_hwtstamp_free(hellcreek);
2068 hellcreek_ptp_free(hellcreek);
2069 dsa_unregister_switch(hellcreek->ds);
2070
2071 return 0;
2072}
2073
2074static void hellcreek_shutdown(struct platform_device *pdev)
2075{
2076 struct hellcreek *hellcreek = platform_get_drvdata(pdev);
2077
2078 if (!hellcreek)
2079 return;
2080
2081 dsa_switch_shutdown(hellcreek->ds);
2082
2083 platform_set_drvdata(pdev, NULL);
2084}
2085
2086static const struct hellcreek_platform_data de1soc_r1_pdata = {
2087 .name = "r4c30",
2088 .num_ports = 4,
2089 .is_100_mbits = 1,
2090 .qbv_support = 1,
2091 .qbv_on_cpu_port = 1,
2092 .qbu_support = 0,
2093 .module_id = 0x4c30,
2094};
2095
2096static const struct of_device_id hellcreek_of_match[] = {
2097 {
2098 .compatible = "hirschmann,hellcreek-de1soc-r1",
2099 .data = &de1soc_r1_pdata,
2100 },
2101 { /* sentinel */ },
2102};
2103MODULE_DEVICE_TABLE(of, hellcreek_of_match);
2104
2105static struct platform_driver hellcreek_driver = {
2106 .probe = hellcreek_probe,
2107 .remove = hellcreek_remove,
2108 .shutdown = hellcreek_shutdown,
2109 .driver = {
2110 .name = "hellcreek",
2111 .of_match_table = hellcreek_of_match,
2112 },
2113};
2114module_platform_driver(hellcreek_driver);
2115
2116MODULE_AUTHOR("Kurt Kanzenbach <kurt@linutronix.de>");
2117MODULE_DESCRIPTION("Hirschmann Hellcreek driver");
2118MODULE_LICENSE("Dual MIT/GPL");