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_mdio.h> |
15 | #include <linux/platform_device.h> |
16 | #include <linux/bitops.h> |
17 | #include <linux/if_bridge.h> |
18 | #include <linux/if_vlan.h> |
19 | #include <linux/etherdevice.h> |
20 | #include <linux/random.h> |
21 | #include <linux/iopoll.h> |
22 | #include <linux/mutex.h> |
23 | #include <linux/delay.h> |
24 | #include <net/dsa.h> |
25 | |
26 | #include "hellcreek.h" |
27 | #include "hellcreek_ptp.h" |
28 | #include "hellcreek_hwtstamp.h" |
29 | |
30 | static const struct hellcreek_counter hellcreek_counter[] = { |
31 | { 0x00, "RxFiltered" , }, |
32 | { 0x01, "RxOctets1k" , }, |
33 | { 0x02, "RxVTAG" , }, |
34 | { 0x03, "RxL2BAD" , }, |
35 | { 0x04, "RxOverloadDrop" , }, |
36 | { 0x05, "RxUC" , }, |
37 | { 0x06, "RxMC" , }, |
38 | { 0x07, "RxBC" , }, |
39 | { 0x08, "RxRS<64" , }, |
40 | { 0x09, "RxRS64" , }, |
41 | { 0x0a, "RxRS65_127" , }, |
42 | { 0x0b, "RxRS128_255" , }, |
43 | { 0x0c, "RxRS256_511" , }, |
44 | { 0x0d, "RxRS512_1023" , }, |
45 | { 0x0e, "RxRS1024_1518" , }, |
46 | { 0x0f, "RxRS>1518" , }, |
47 | { 0x10, "TxTailDropQueue0" , }, |
48 | { 0x11, "TxTailDropQueue1" , }, |
49 | { 0x12, "TxTailDropQueue2" , }, |
50 | { 0x13, "TxTailDropQueue3" , }, |
51 | { 0x14, "TxTailDropQueue4" , }, |
52 | { 0x15, "TxTailDropQueue5" , }, |
53 | { 0x16, "TxTailDropQueue6" , }, |
54 | { 0x17, "TxTailDropQueue7" , }, |
55 | { 0x18, "RxTrafficClass0" , }, |
56 | { 0x19, "RxTrafficClass1" , }, |
57 | { 0x1a, "RxTrafficClass2" , }, |
58 | { 0x1b, "RxTrafficClass3" , }, |
59 | { 0x1c, "RxTrafficClass4" , }, |
60 | { 0x1d, "RxTrafficClass5" , }, |
61 | { 0x1e, "RxTrafficClass6" , }, |
62 | { 0x1f, "RxTrafficClass7" , }, |
63 | { 0x21, "TxOctets1k" , }, |
64 | { 0x22, "TxVTAG" , }, |
65 | { 0x23, "TxL2BAD" , }, |
66 | { 0x25, "TxUC" , }, |
67 | { 0x26, "TxMC" , }, |
68 | { 0x27, "TxBC" , }, |
69 | { 0x28, "TxTS<64" , }, |
70 | { 0x29, "TxTS64" , }, |
71 | { 0x2a, "TxTS65_127" , }, |
72 | { 0x2b, "TxTS128_255" , }, |
73 | { 0x2c, "TxTS256_511" , }, |
74 | { 0x2d, "TxTS512_1023" , }, |
75 | { 0x2e, "TxTS1024_1518" , }, |
76 | { 0x2f, "TxTS>1518" , }, |
77 | { 0x30, "TxTrafficClassOverrun0" , }, |
78 | { 0x31, "TxTrafficClassOverrun1" , }, |
79 | { 0x32, "TxTrafficClassOverrun2" , }, |
80 | { 0x33, "TxTrafficClassOverrun3" , }, |
81 | { 0x34, "TxTrafficClassOverrun4" , }, |
82 | { 0x35, "TxTrafficClassOverrun5" , }, |
83 | { 0x36, "TxTrafficClassOverrun6" , }, |
84 | { 0x37, "TxTrafficClassOverrun7" , }, |
85 | { 0x38, "TxTrafficClass0" , }, |
86 | { 0x39, "TxTrafficClass1" , }, |
87 | { 0x3a, "TxTrafficClass2" , }, |
88 | { 0x3b, "TxTrafficClass3" , }, |
89 | { 0x3c, "TxTrafficClass4" , }, |
90 | { 0x3d, "TxTrafficClass5" , }, |
91 | { 0x3e, "TxTrafficClass6" , }, |
92 | { 0x3f, "TxTrafficClass7" , }, |
93 | }; |
94 | |
95 | static u16 hellcreek_read(struct hellcreek *hellcreek, unsigned int offset) |
96 | { |
97 | return readw(addr: hellcreek->base + offset); |
98 | } |
99 | |
100 | static u16 hellcreek_read_ctrl(struct hellcreek *hellcreek) |
101 | { |
102 | return readw(addr: hellcreek->base + HR_CTRL_C); |
103 | } |
104 | |
105 | static u16 hellcreek_read_stat(struct hellcreek *hellcreek) |
106 | { |
107 | return readw(addr: hellcreek->base + HR_SWSTAT); |
108 | } |
109 | |
110 | static void hellcreek_write(struct hellcreek *hellcreek, u16 data, |
111 | unsigned int offset) |
112 | { |
113 | writew(val: data, addr: hellcreek->base + offset); |
114 | } |
115 | |
116 | static void hellcreek_select_port(struct hellcreek *hellcreek, int port) |
117 | { |
118 | u16 val = port << HR_PSEL_PTWSEL_SHIFT; |
119 | |
120 | hellcreek_write(hellcreek, data: val, HR_PSEL); |
121 | } |
122 | |
123 | static void hellcreek_select_prio(struct hellcreek *hellcreek, int prio) |
124 | { |
125 | u16 val = prio << HR_PSEL_PRTCWSEL_SHIFT; |
126 | |
127 | hellcreek_write(hellcreek, data: val, HR_PSEL); |
128 | } |
129 | |
130 | static void hellcreek_select_port_prio(struct hellcreek *hellcreek, int port, |
131 | int prio) |
132 | { |
133 | u16 val = port << HR_PSEL_PTWSEL_SHIFT; |
134 | |
135 | val |= prio << HR_PSEL_PRTCWSEL_SHIFT; |
136 | |
137 | hellcreek_write(hellcreek, data: val, HR_PSEL); |
138 | } |
139 | |
140 | static void hellcreek_select_counter(struct hellcreek *hellcreek, int counter) |
141 | { |
142 | u16 val = counter << HR_CSEL_SHIFT; |
143 | |
144 | hellcreek_write(hellcreek, data: val, HR_CSEL); |
145 | |
146 | /* Data sheet states to wait at least 20 internal clock cycles */ |
147 | ndelay(200); |
148 | } |
149 | |
150 | static void hellcreek_select_vlan(struct hellcreek *hellcreek, int vid, |
151 | bool pvid) |
152 | { |
153 | u16 val = 0; |
154 | |
155 | /* Set pvid bit first */ |
156 | if (pvid) |
157 | val |= HR_VIDCFG_PVID; |
158 | hellcreek_write(hellcreek, data: val, HR_VIDCFG); |
159 | |
160 | /* Set vlan */ |
161 | val |= vid << HR_VIDCFG_VID_SHIFT; |
162 | hellcreek_write(hellcreek, data: val, HR_VIDCFG); |
163 | } |
164 | |
165 | static void hellcreek_select_tgd(struct hellcreek *hellcreek, int port) |
166 | { |
167 | u16 val = port << TR_TGDSEL_TDGSEL_SHIFT; |
168 | |
169 | hellcreek_write(hellcreek, data: val, TR_TGDSEL); |
170 | } |
171 | |
172 | static int hellcreek_wait_until_ready(struct hellcreek *hellcreek) |
173 | { |
174 | u16 val; |
175 | |
176 | /* Wait up to 1ms, although 3 us should be enough */ |
177 | return readx_poll_timeout(hellcreek_read_ctrl, hellcreek, |
178 | val, val & HR_CTRL_C_READY, |
179 | 3, 1000); |
180 | } |
181 | |
182 | static int hellcreek_wait_until_transitioned(struct hellcreek *hellcreek) |
183 | { |
184 | u16 val; |
185 | |
186 | return readx_poll_timeout_atomic(hellcreek_read_ctrl, hellcreek, |
187 | val, !(val & HR_CTRL_C_TRANSITION), |
188 | 1, 1000); |
189 | } |
190 | |
191 | static int hellcreek_wait_fdb_ready(struct hellcreek *hellcreek) |
192 | { |
193 | u16 val; |
194 | |
195 | return readx_poll_timeout_atomic(hellcreek_read_stat, hellcreek, |
196 | val, !(val & HR_SWSTAT_BUSY), |
197 | 1, 1000); |
198 | } |
199 | |
200 | static int hellcreek_detect(struct hellcreek *hellcreek) |
201 | { |
202 | u16 id, rel_low, rel_high, date_low, date_high, tgd_ver; |
203 | u8 tgd_maj, tgd_min; |
204 | u32 rel, date; |
205 | |
206 | id = hellcreek_read(hellcreek, HR_MODID_C); |
207 | rel_low = hellcreek_read(hellcreek, HR_REL_L_C); |
208 | rel_high = hellcreek_read(hellcreek, HR_REL_H_C); |
209 | date_low = hellcreek_read(hellcreek, HR_BLD_L_C); |
210 | date_high = hellcreek_read(hellcreek, HR_BLD_H_C); |
211 | tgd_ver = hellcreek_read(hellcreek, TR_TGDVER); |
212 | |
213 | if (id != hellcreek->pdata->module_id) |
214 | return -ENODEV; |
215 | |
216 | rel = rel_low | (rel_high << 16); |
217 | date = date_low | (date_high << 16); |
218 | tgd_maj = (tgd_ver & TR_TGDVER_REV_MAJ_MASK) >> TR_TGDVER_REV_MAJ_SHIFT; |
219 | tgd_min = (tgd_ver & TR_TGDVER_REV_MIN_MASK) >> TR_TGDVER_REV_MIN_SHIFT; |
220 | |
221 | dev_info(hellcreek->dev, "Module ID=%02x Release=%04x Date=%04x TGD Version=%02x.%02x\n" , |
222 | id, rel, date, tgd_maj, tgd_min); |
223 | |
224 | return 0; |
225 | } |
226 | |
227 | static void hellcreek_feature_detect(struct hellcreek *hellcreek) |
228 | { |
229 | u16 features; |
230 | |
231 | features = hellcreek_read(hellcreek, HR_FEABITS0); |
232 | |
233 | /* Only detect the size of the FDB table. The size and current |
234 | * utilization can be queried via devlink. |
235 | */ |
236 | hellcreek->fdb_entries = ((features & HR_FEABITS0_FDBBINS_MASK) >> |
237 | HR_FEABITS0_FDBBINS_SHIFT) * 32; |
238 | } |
239 | |
240 | static enum dsa_tag_protocol hellcreek_get_tag_protocol(struct dsa_switch *ds, |
241 | int port, |
242 | enum dsa_tag_protocol mp) |
243 | { |
244 | return DSA_TAG_PROTO_HELLCREEK; |
245 | } |
246 | |
247 | static int hellcreek_port_enable(struct dsa_switch *ds, int port, |
248 | struct phy_device *phy) |
249 | { |
250 | struct hellcreek *hellcreek = ds->priv; |
251 | struct hellcreek_port *hellcreek_port; |
252 | u16 val; |
253 | |
254 | hellcreek_port = &hellcreek->ports[port]; |
255 | |
256 | dev_dbg(hellcreek->dev, "Enable port %d\n" , port); |
257 | |
258 | mutex_lock(&hellcreek->reg_lock); |
259 | |
260 | hellcreek_select_port(hellcreek, port); |
261 | val = hellcreek_port->ptcfg; |
262 | val |= HR_PTCFG_ADMIN_EN; |
263 | hellcreek_write(hellcreek, data: val, HR_PTCFG); |
264 | hellcreek_port->ptcfg = val; |
265 | |
266 | mutex_unlock(lock: &hellcreek->reg_lock); |
267 | |
268 | return 0; |
269 | } |
270 | |
271 | static void hellcreek_port_disable(struct dsa_switch *ds, int port) |
272 | { |
273 | struct hellcreek *hellcreek = ds->priv; |
274 | struct hellcreek_port *hellcreek_port; |
275 | u16 val; |
276 | |
277 | hellcreek_port = &hellcreek->ports[port]; |
278 | |
279 | dev_dbg(hellcreek->dev, "Disable port %d\n" , port); |
280 | |
281 | mutex_lock(&hellcreek->reg_lock); |
282 | |
283 | hellcreek_select_port(hellcreek, port); |
284 | val = hellcreek_port->ptcfg; |
285 | val &= ~HR_PTCFG_ADMIN_EN; |
286 | hellcreek_write(hellcreek, data: val, HR_PTCFG); |
287 | hellcreek_port->ptcfg = val; |
288 | |
289 | mutex_unlock(lock: &hellcreek->reg_lock); |
290 | } |
291 | |
292 | static void hellcreek_get_strings(struct dsa_switch *ds, int port, |
293 | u32 stringset, uint8_t *data) |
294 | { |
295 | int i; |
296 | |
297 | for (i = 0; i < ARRAY_SIZE(hellcreek_counter); ++i) { |
298 | const struct hellcreek_counter *counter = &hellcreek_counter[i]; |
299 | |
300 | strscpy(data + i * ETH_GSTRING_LEN, |
301 | counter->name, ETH_GSTRING_LEN); |
302 | } |
303 | } |
304 | |
305 | static int hellcreek_get_sset_count(struct dsa_switch *ds, int port, int sset) |
306 | { |
307 | if (sset != ETH_SS_STATS) |
308 | return 0; |
309 | |
310 | return ARRAY_SIZE(hellcreek_counter); |
311 | } |
312 | |
313 | static void hellcreek_get_ethtool_stats(struct dsa_switch *ds, int port, |
314 | uint64_t *data) |
315 | { |
316 | struct hellcreek *hellcreek = ds->priv; |
317 | struct hellcreek_port *hellcreek_port; |
318 | int i; |
319 | |
320 | hellcreek_port = &hellcreek->ports[port]; |
321 | |
322 | for (i = 0; i < ARRAY_SIZE(hellcreek_counter); ++i) { |
323 | const struct hellcreek_counter *counter = &hellcreek_counter[i]; |
324 | u8 offset = counter->offset + port * 64; |
325 | u16 high, low; |
326 | u64 value; |
327 | |
328 | mutex_lock(&hellcreek->reg_lock); |
329 | |
330 | hellcreek_select_counter(hellcreek, counter: offset); |
331 | |
332 | /* The registers are locked internally by selecting the |
333 | * counter. So low and high can be read without reading high |
334 | * again. |
335 | */ |
336 | high = hellcreek_read(hellcreek, HR_CRDH); |
337 | low = hellcreek_read(hellcreek, HR_CRDL); |
338 | value = ((u64)high << 16) | low; |
339 | |
340 | hellcreek_port->counter_values[i] += value; |
341 | data[i] = hellcreek_port->counter_values[i]; |
342 | |
343 | mutex_unlock(lock: &hellcreek->reg_lock); |
344 | } |
345 | } |
346 | |
347 | static u16 hellcreek_private_vid(int port) |
348 | { |
349 | return VLAN_N_VID - port + 1; |
350 | } |
351 | |
352 | static int hellcreek_vlan_prepare(struct dsa_switch *ds, int port, |
353 | const struct switchdev_obj_port_vlan *vlan, |
354 | struct netlink_ext_ack *extack) |
355 | { |
356 | struct hellcreek *hellcreek = ds->priv; |
357 | int i; |
358 | |
359 | dev_dbg(hellcreek->dev, "VLAN prepare for port %d\n" , port); |
360 | |
361 | /* Restriction: Make sure that nobody uses the "private" VLANs. These |
362 | * VLANs are internally used by the driver to ensure port |
363 | * separation. Thus, they cannot be used by someone else. |
364 | */ |
365 | for (i = 0; i < hellcreek->pdata->num_ports; ++i) { |
366 | const u16 restricted_vid = hellcreek_private_vid(port: i); |
367 | |
368 | if (!dsa_is_user_port(ds, p: i)) |
369 | continue; |
370 | |
371 | if (vlan->vid == restricted_vid) { |
372 | NL_SET_ERR_MSG_MOD(extack, "VID restricted by driver" ); |
373 | return -EBUSY; |
374 | } |
375 | } |
376 | |
377 | return 0; |
378 | } |
379 | |
380 | static void hellcreek_select_vlan_params(struct hellcreek *hellcreek, int port, |
381 | int *shift, int *mask) |
382 | { |
383 | switch (port) { |
384 | case 0: |
385 | *shift = HR_VIDMBRCFG_P0MBR_SHIFT; |
386 | *mask = HR_VIDMBRCFG_P0MBR_MASK; |
387 | break; |
388 | case 1: |
389 | *shift = HR_VIDMBRCFG_P1MBR_SHIFT; |
390 | *mask = HR_VIDMBRCFG_P1MBR_MASK; |
391 | break; |
392 | case 2: |
393 | *shift = HR_VIDMBRCFG_P2MBR_SHIFT; |
394 | *mask = HR_VIDMBRCFG_P2MBR_MASK; |
395 | break; |
396 | case 3: |
397 | *shift = HR_VIDMBRCFG_P3MBR_SHIFT; |
398 | *mask = HR_VIDMBRCFG_P3MBR_MASK; |
399 | break; |
400 | default: |
401 | *shift = *mask = 0; |
402 | dev_err(hellcreek->dev, "Unknown port %d selected!\n" , port); |
403 | } |
404 | } |
405 | |
406 | static void hellcreek_apply_vlan(struct hellcreek *hellcreek, int port, u16 vid, |
407 | bool pvid, bool untagged) |
408 | { |
409 | int shift, mask; |
410 | u16 val; |
411 | |
412 | dev_dbg(hellcreek->dev, "Apply VLAN: port=%d vid=%u pvid=%d untagged=%d" , |
413 | port, vid, pvid, untagged); |
414 | |
415 | mutex_lock(&hellcreek->reg_lock); |
416 | |
417 | hellcreek_select_port(hellcreek, port); |
418 | hellcreek_select_vlan(hellcreek, vid, pvid); |
419 | |
420 | /* Setup port vlan membership */ |
421 | hellcreek_select_vlan_params(hellcreek, port, shift: &shift, mask: &mask); |
422 | val = hellcreek->vidmbrcfg[vid]; |
423 | val &= ~mask; |
424 | if (untagged) |
425 | val |= HELLCREEK_VLAN_UNTAGGED_MEMBER << shift; |
426 | else |
427 | val |= HELLCREEK_VLAN_TAGGED_MEMBER << shift; |
428 | |
429 | hellcreek_write(hellcreek, data: val, HR_VIDMBRCFG); |
430 | hellcreek->vidmbrcfg[vid] = val; |
431 | |
432 | mutex_unlock(lock: &hellcreek->reg_lock); |
433 | } |
434 | |
435 | static void hellcreek_unapply_vlan(struct hellcreek *hellcreek, int port, |
436 | u16 vid) |
437 | { |
438 | int shift, mask; |
439 | u16 val; |
440 | |
441 | dev_dbg(hellcreek->dev, "Unapply VLAN: port=%d vid=%u\n" , port, vid); |
442 | |
443 | mutex_lock(&hellcreek->reg_lock); |
444 | |
445 | hellcreek_select_vlan(hellcreek, vid, pvid: false); |
446 | |
447 | /* Setup port vlan membership */ |
448 | hellcreek_select_vlan_params(hellcreek, port, shift: &shift, mask: &mask); |
449 | val = hellcreek->vidmbrcfg[vid]; |
450 | val &= ~mask; |
451 | val |= HELLCREEK_VLAN_NO_MEMBER << shift; |
452 | |
453 | hellcreek_write(hellcreek, data: val, HR_VIDMBRCFG); |
454 | hellcreek->vidmbrcfg[vid] = val; |
455 | |
456 | mutex_unlock(lock: &hellcreek->reg_lock); |
457 | } |
458 | |
459 | static int hellcreek_vlan_add(struct dsa_switch *ds, int port, |
460 | const struct switchdev_obj_port_vlan *vlan, |
461 | struct netlink_ext_ack *extack) |
462 | { |
463 | bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED; |
464 | bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID; |
465 | struct hellcreek *hellcreek = ds->priv; |
466 | int err; |
467 | |
468 | err = hellcreek_vlan_prepare(ds, port, vlan, extack); |
469 | if (err) |
470 | return err; |
471 | |
472 | dev_dbg(hellcreek->dev, "Add VLAN %d on port %d, %s, %s\n" , |
473 | vlan->vid, port, untagged ? "untagged" : "tagged" , |
474 | pvid ? "PVID" : "no PVID" ); |
475 | |
476 | hellcreek_apply_vlan(hellcreek, port, vid: vlan->vid, pvid, untagged); |
477 | |
478 | return 0; |
479 | } |
480 | |
481 | static int hellcreek_vlan_del(struct dsa_switch *ds, int port, |
482 | const struct switchdev_obj_port_vlan *vlan) |
483 | { |
484 | struct hellcreek *hellcreek = ds->priv; |
485 | |
486 | dev_dbg(hellcreek->dev, "Remove VLAN %d on port %d\n" , vlan->vid, port); |
487 | |
488 | hellcreek_unapply_vlan(hellcreek, port, vid: vlan->vid); |
489 | |
490 | return 0; |
491 | } |
492 | |
493 | static void hellcreek_port_stp_state_set(struct dsa_switch *ds, int port, |
494 | u8 state) |
495 | { |
496 | struct hellcreek *hellcreek = ds->priv; |
497 | struct hellcreek_port *hellcreek_port; |
498 | const char *new_state; |
499 | u16 val; |
500 | |
501 | mutex_lock(&hellcreek->reg_lock); |
502 | |
503 | hellcreek_port = &hellcreek->ports[port]; |
504 | val = hellcreek_port->ptcfg; |
505 | |
506 | switch (state) { |
507 | case BR_STATE_DISABLED: |
508 | new_state = "DISABLED" ; |
509 | val |= HR_PTCFG_BLOCKED; |
510 | val &= ~HR_PTCFG_LEARNING_EN; |
511 | break; |
512 | case BR_STATE_BLOCKING: |
513 | new_state = "BLOCKING" ; |
514 | val |= HR_PTCFG_BLOCKED; |
515 | val &= ~HR_PTCFG_LEARNING_EN; |
516 | break; |
517 | case BR_STATE_LISTENING: |
518 | new_state = "LISTENING" ; |
519 | val |= HR_PTCFG_BLOCKED; |
520 | val &= ~HR_PTCFG_LEARNING_EN; |
521 | break; |
522 | case BR_STATE_LEARNING: |
523 | new_state = "LEARNING" ; |
524 | val |= HR_PTCFG_BLOCKED; |
525 | val |= HR_PTCFG_LEARNING_EN; |
526 | break; |
527 | case BR_STATE_FORWARDING: |
528 | new_state = "FORWARDING" ; |
529 | val &= ~HR_PTCFG_BLOCKED; |
530 | val |= HR_PTCFG_LEARNING_EN; |
531 | break; |
532 | default: |
533 | new_state = "UNKNOWN" ; |
534 | } |
535 | |
536 | hellcreek_select_port(hellcreek, port); |
537 | hellcreek_write(hellcreek, data: val, HR_PTCFG); |
538 | hellcreek_port->ptcfg = val; |
539 | |
540 | mutex_unlock(lock: &hellcreek->reg_lock); |
541 | |
542 | dev_dbg(hellcreek->dev, "Configured STP state for port %d: %s\n" , |
543 | port, new_state); |
544 | } |
545 | |
546 | static void hellcreek_setup_ingressflt(struct hellcreek *hellcreek, int port, |
547 | bool enable) |
548 | { |
549 | struct hellcreek_port *hellcreek_port = &hellcreek->ports[port]; |
550 | u16 ptcfg; |
551 | |
552 | mutex_lock(&hellcreek->reg_lock); |
553 | |
554 | ptcfg = hellcreek_port->ptcfg; |
555 | |
556 | if (enable) |
557 | ptcfg |= HR_PTCFG_INGRESSFLT; |
558 | else |
559 | ptcfg &= ~HR_PTCFG_INGRESSFLT; |
560 | |
561 | hellcreek_select_port(hellcreek, port); |
562 | hellcreek_write(hellcreek, data: ptcfg, HR_PTCFG); |
563 | hellcreek_port->ptcfg = ptcfg; |
564 | |
565 | mutex_unlock(lock: &hellcreek->reg_lock); |
566 | } |
567 | |
568 | static void hellcreek_setup_vlan_awareness(struct hellcreek *hellcreek, |
569 | bool enable) |
570 | { |
571 | u16 swcfg; |
572 | |
573 | mutex_lock(&hellcreek->reg_lock); |
574 | |
575 | swcfg = hellcreek->swcfg; |
576 | |
577 | if (enable) |
578 | swcfg |= HR_SWCFG_VLAN_UNAWARE; |
579 | else |
580 | swcfg &= ~HR_SWCFG_VLAN_UNAWARE; |
581 | |
582 | hellcreek_write(hellcreek, data: swcfg, HR_SWCFG); |
583 | |
584 | mutex_unlock(lock: &hellcreek->reg_lock); |
585 | } |
586 | |
587 | /* Default setup for DSA: VLAN <X>: CPU and Port <X> egress untagged. */ |
588 | static void hellcreek_setup_vlan_membership(struct dsa_switch *ds, int port, |
589 | bool enabled) |
590 | { |
591 | const u16 vid = hellcreek_private_vid(port); |
592 | int upstream = dsa_upstream_port(ds, port); |
593 | struct hellcreek *hellcreek = ds->priv; |
594 | |
595 | /* Apply vid to port as egress untagged and port vlan id */ |
596 | if (enabled) |
597 | hellcreek_apply_vlan(hellcreek, port, vid, pvid: true, untagged: true); |
598 | else |
599 | hellcreek_unapply_vlan(hellcreek, port, vid); |
600 | |
601 | /* Apply vid to cpu port as well */ |
602 | if (enabled) |
603 | hellcreek_apply_vlan(hellcreek, port: upstream, vid, pvid: false, untagged: true); |
604 | else |
605 | hellcreek_unapply_vlan(hellcreek, port: upstream, vid); |
606 | } |
607 | |
608 | static void hellcreek_port_set_ucast_flood(struct hellcreek *hellcreek, |
609 | int port, bool enable) |
610 | { |
611 | struct hellcreek_port *hellcreek_port; |
612 | u16 val; |
613 | |
614 | hellcreek_port = &hellcreek->ports[port]; |
615 | |
616 | dev_dbg(hellcreek->dev, "%s unicast flooding on port %d\n" , |
617 | enable ? "Enable" : "Disable" , port); |
618 | |
619 | mutex_lock(&hellcreek->reg_lock); |
620 | |
621 | hellcreek_select_port(hellcreek, port); |
622 | val = hellcreek_port->ptcfg; |
623 | if (enable) |
624 | val &= ~HR_PTCFG_UUC_FLT; |
625 | else |
626 | val |= HR_PTCFG_UUC_FLT; |
627 | hellcreek_write(hellcreek, data: val, HR_PTCFG); |
628 | hellcreek_port->ptcfg = val; |
629 | |
630 | mutex_unlock(lock: &hellcreek->reg_lock); |
631 | } |
632 | |
633 | static void hellcreek_port_set_mcast_flood(struct hellcreek *hellcreek, |
634 | int port, bool enable) |
635 | { |
636 | struct hellcreek_port *hellcreek_port; |
637 | u16 val; |
638 | |
639 | hellcreek_port = &hellcreek->ports[port]; |
640 | |
641 | dev_dbg(hellcreek->dev, "%s multicast flooding on port %d\n" , |
642 | enable ? "Enable" : "Disable" , port); |
643 | |
644 | mutex_lock(&hellcreek->reg_lock); |
645 | |
646 | hellcreek_select_port(hellcreek, port); |
647 | val = hellcreek_port->ptcfg; |
648 | if (enable) |
649 | val &= ~HR_PTCFG_UMC_FLT; |
650 | else |
651 | val |= HR_PTCFG_UMC_FLT; |
652 | hellcreek_write(hellcreek, data: val, HR_PTCFG); |
653 | hellcreek_port->ptcfg = val; |
654 | |
655 | mutex_unlock(lock: &hellcreek->reg_lock); |
656 | } |
657 | |
658 | static int hellcreek_pre_bridge_flags(struct dsa_switch *ds, int port, |
659 | struct switchdev_brport_flags flags, |
660 | struct netlink_ext_ack *extack) |
661 | { |
662 | if (flags.mask & ~(BR_FLOOD | BR_MCAST_FLOOD)) |
663 | return -EINVAL; |
664 | |
665 | return 0; |
666 | } |
667 | |
668 | static int hellcreek_bridge_flags(struct dsa_switch *ds, int port, |
669 | struct switchdev_brport_flags flags, |
670 | struct netlink_ext_ack *extack) |
671 | { |
672 | struct hellcreek *hellcreek = ds->priv; |
673 | |
674 | if (flags.mask & BR_FLOOD) |
675 | hellcreek_port_set_ucast_flood(hellcreek, port, |
676 | enable: !!(flags.val & BR_FLOOD)); |
677 | |
678 | if (flags.mask & BR_MCAST_FLOOD) |
679 | hellcreek_port_set_mcast_flood(hellcreek, port, |
680 | enable: !!(flags.val & BR_MCAST_FLOOD)); |
681 | |
682 | return 0; |
683 | } |
684 | |
685 | static int hellcreek_port_bridge_join(struct dsa_switch *ds, int port, |
686 | struct dsa_bridge bridge, |
687 | bool *tx_fwd_offload, |
688 | struct netlink_ext_ack *extack) |
689 | { |
690 | struct hellcreek *hellcreek = ds->priv; |
691 | |
692 | dev_dbg(hellcreek->dev, "Port %d joins a bridge\n" , port); |
693 | |
694 | /* When joining a vlan_filtering bridge, keep the switch VLAN aware */ |
695 | if (!ds->vlan_filtering) |
696 | hellcreek_setup_vlan_awareness(hellcreek, enable: false); |
697 | |
698 | /* Drop private vlans */ |
699 | hellcreek_setup_vlan_membership(ds, port, enabled: false); |
700 | |
701 | return 0; |
702 | } |
703 | |
704 | static void hellcreek_port_bridge_leave(struct dsa_switch *ds, int port, |
705 | struct dsa_bridge bridge) |
706 | { |
707 | struct hellcreek *hellcreek = ds->priv; |
708 | |
709 | dev_dbg(hellcreek->dev, "Port %d leaves a bridge\n" , port); |
710 | |
711 | /* Enable VLAN awareness */ |
712 | hellcreek_setup_vlan_awareness(hellcreek, enable: true); |
713 | |
714 | /* Enable private vlans */ |
715 | hellcreek_setup_vlan_membership(ds, port, enabled: true); |
716 | } |
717 | |
718 | static int __hellcreek_fdb_add(struct hellcreek *hellcreek, |
719 | const struct hellcreek_fdb_entry *entry) |
720 | { |
721 | u16 meta = 0; |
722 | |
723 | dev_dbg(hellcreek->dev, "Add static FDB entry: MAC=%pM, MASK=0x%02x, " |
724 | "OBT=%d, PASS_BLOCKED=%d, REPRIO_EN=%d, PRIO=%d\n" , entry->mac, |
725 | entry->portmask, entry->is_obt, entry->pass_blocked, |
726 | entry->reprio_en, entry->reprio_tc); |
727 | |
728 | /* Add mac address */ |
729 | hellcreek_write(hellcreek, data: entry->mac[1] | (entry->mac[0] << 8), HR_FDBWDH); |
730 | hellcreek_write(hellcreek, data: entry->mac[3] | (entry->mac[2] << 8), HR_FDBWDM); |
731 | hellcreek_write(hellcreek, data: entry->mac[5] | (entry->mac[4] << 8), HR_FDBWDL); |
732 | |
733 | /* Meta data */ |
734 | meta |= entry->portmask << HR_FDBWRM0_PORTMASK_SHIFT; |
735 | if (entry->is_obt) |
736 | meta |= HR_FDBWRM0_OBT; |
737 | if (entry->pass_blocked) |
738 | meta |= HR_FDBWRM0_PASS_BLOCKED; |
739 | if (entry->reprio_en) { |
740 | meta |= HR_FDBWRM0_REPRIO_EN; |
741 | meta |= entry->reprio_tc << HR_FDBWRM0_REPRIO_TC_SHIFT; |
742 | } |
743 | hellcreek_write(hellcreek, data: meta, HR_FDBWRM0); |
744 | |
745 | /* Commit */ |
746 | hellcreek_write(hellcreek, data: 0x00, HR_FDBWRCMD); |
747 | |
748 | /* Wait until done */ |
749 | return hellcreek_wait_fdb_ready(hellcreek); |
750 | } |
751 | |
752 | static int __hellcreek_fdb_del(struct hellcreek *hellcreek, |
753 | const struct hellcreek_fdb_entry *entry) |
754 | { |
755 | dev_dbg(hellcreek->dev, "Delete FDB entry: MAC=%pM!\n" , entry->mac); |
756 | |
757 | /* Delete by matching idx */ |
758 | hellcreek_write(hellcreek, data: entry->idx | HR_FDBWRCMD_FDBDEL, HR_FDBWRCMD); |
759 | |
760 | /* Wait until done */ |
761 | return hellcreek_wait_fdb_ready(hellcreek); |
762 | } |
763 | |
764 | static void hellcreek_populate_fdb_entry(struct hellcreek *hellcreek, |
765 | struct hellcreek_fdb_entry *entry, |
766 | size_t idx) |
767 | { |
768 | unsigned char addr[ETH_ALEN]; |
769 | u16 meta, mac; |
770 | |
771 | /* Read values */ |
772 | meta = hellcreek_read(hellcreek, HR_FDBMDRD); |
773 | mac = hellcreek_read(hellcreek, HR_FDBRDL); |
774 | addr[5] = mac & 0xff; |
775 | addr[4] = (mac & 0xff00) >> 8; |
776 | mac = hellcreek_read(hellcreek, HR_FDBRDM); |
777 | addr[3] = mac & 0xff; |
778 | addr[2] = (mac & 0xff00) >> 8; |
779 | mac = hellcreek_read(hellcreek, HR_FDBRDH); |
780 | addr[1] = mac & 0xff; |
781 | addr[0] = (mac & 0xff00) >> 8; |
782 | |
783 | /* Populate @entry */ |
784 | memcpy(entry->mac, addr, sizeof(addr)); |
785 | entry->idx = idx; |
786 | entry->portmask = (meta & HR_FDBMDRD_PORTMASK_MASK) >> |
787 | HR_FDBMDRD_PORTMASK_SHIFT; |
788 | entry->age = (meta & HR_FDBMDRD_AGE_MASK) >> |
789 | HR_FDBMDRD_AGE_SHIFT; |
790 | entry->is_obt = !!(meta & HR_FDBMDRD_OBT); |
791 | entry->pass_blocked = !!(meta & HR_FDBMDRD_PASS_BLOCKED); |
792 | entry->is_static = !!(meta & HR_FDBMDRD_STATIC); |
793 | entry->reprio_tc = (meta & HR_FDBMDRD_REPRIO_TC_MASK) >> |
794 | HR_FDBMDRD_REPRIO_TC_SHIFT; |
795 | entry->reprio_en = !!(meta & HR_FDBMDRD_REPRIO_EN); |
796 | } |
797 | |
798 | /* Retrieve the index of a FDB entry by mac address. Currently we search through |
799 | * the complete table in hardware. If that's too slow, we might have to cache |
800 | * the complete FDB table in software. |
801 | */ |
802 | static int hellcreek_fdb_get(struct hellcreek *hellcreek, |
803 | const unsigned char *dest, |
804 | struct hellcreek_fdb_entry *entry) |
805 | { |
806 | size_t i; |
807 | |
808 | /* Set read pointer to zero: The read of HR_FDBMAX (read-only register) |
809 | * should reset the internal pointer. But, that doesn't work. The vendor |
810 | * suggested a subsequent write as workaround. Same for HR_FDBRDH below. |
811 | */ |
812 | hellcreek_read(hellcreek, HR_FDBMAX); |
813 | hellcreek_write(hellcreek, data: 0x00, HR_FDBMAX); |
814 | |
815 | /* We have to read the complete table, because the switch/driver might |
816 | * enter new entries anywhere. |
817 | */ |
818 | for (i = 0; i < hellcreek->fdb_entries; ++i) { |
819 | struct hellcreek_fdb_entry tmp = { 0 }; |
820 | |
821 | /* Read entry */ |
822 | hellcreek_populate_fdb_entry(hellcreek, entry: &tmp, idx: i); |
823 | |
824 | /* Force next entry */ |
825 | hellcreek_write(hellcreek, data: 0x00, HR_FDBRDH); |
826 | |
827 | if (memcmp(p: tmp.mac, q: dest, ETH_ALEN)) |
828 | continue; |
829 | |
830 | /* Match found */ |
831 | memcpy(entry, &tmp, sizeof(*entry)); |
832 | |
833 | return 0; |
834 | } |
835 | |
836 | return -ENOENT; |
837 | } |
838 | |
839 | static int hellcreek_fdb_add(struct dsa_switch *ds, int port, |
840 | const unsigned char *addr, u16 vid, |
841 | struct dsa_db db) |
842 | { |
843 | struct hellcreek_fdb_entry entry = { 0 }; |
844 | struct hellcreek *hellcreek = ds->priv; |
845 | int ret; |
846 | |
847 | dev_dbg(hellcreek->dev, "Add FDB entry for MAC=%pM\n" , addr); |
848 | |
849 | mutex_lock(&hellcreek->reg_lock); |
850 | |
851 | ret = hellcreek_fdb_get(hellcreek, dest: addr, entry: &entry); |
852 | if (ret) { |
853 | /* Not found */ |
854 | memcpy(entry.mac, addr, sizeof(entry.mac)); |
855 | entry.portmask = BIT(port); |
856 | |
857 | ret = __hellcreek_fdb_add(hellcreek, entry: &entry); |
858 | if (ret) { |
859 | dev_err(hellcreek->dev, "Failed to add FDB entry!\n" ); |
860 | goto out; |
861 | } |
862 | } else { |
863 | /* Found */ |
864 | ret = __hellcreek_fdb_del(hellcreek, entry: &entry); |
865 | if (ret) { |
866 | dev_err(hellcreek->dev, "Failed to delete FDB entry!\n" ); |
867 | goto out; |
868 | } |
869 | |
870 | entry.portmask |= BIT(port); |
871 | |
872 | ret = __hellcreek_fdb_add(hellcreek, entry: &entry); |
873 | if (ret) { |
874 | dev_err(hellcreek->dev, "Failed to add FDB entry!\n" ); |
875 | goto out; |
876 | } |
877 | } |
878 | |
879 | out: |
880 | mutex_unlock(lock: &hellcreek->reg_lock); |
881 | |
882 | return ret; |
883 | } |
884 | |
885 | static int hellcreek_fdb_del(struct dsa_switch *ds, int port, |
886 | const unsigned char *addr, u16 vid, |
887 | struct dsa_db db) |
888 | { |
889 | struct hellcreek_fdb_entry entry = { 0 }; |
890 | struct hellcreek *hellcreek = ds->priv; |
891 | int ret; |
892 | |
893 | dev_dbg(hellcreek->dev, "Delete FDB entry for MAC=%pM\n" , addr); |
894 | |
895 | mutex_lock(&hellcreek->reg_lock); |
896 | |
897 | ret = hellcreek_fdb_get(hellcreek, dest: addr, entry: &entry); |
898 | if (ret) { |
899 | /* Not found */ |
900 | dev_err(hellcreek->dev, "FDB entry for deletion not found!\n" ); |
901 | } else { |
902 | /* Found */ |
903 | ret = __hellcreek_fdb_del(hellcreek, entry: &entry); |
904 | if (ret) { |
905 | dev_err(hellcreek->dev, "Failed to delete FDB entry!\n" ); |
906 | goto out; |
907 | } |
908 | |
909 | entry.portmask &= ~BIT(port); |
910 | |
911 | if (entry.portmask != 0x00) { |
912 | ret = __hellcreek_fdb_add(hellcreek, entry: &entry); |
913 | if (ret) { |
914 | dev_err(hellcreek->dev, "Failed to add FDB entry!\n" ); |
915 | goto out; |
916 | } |
917 | } |
918 | } |
919 | |
920 | out: |
921 | mutex_unlock(lock: &hellcreek->reg_lock); |
922 | |
923 | return ret; |
924 | } |
925 | |
926 | static int hellcreek_fdb_dump(struct dsa_switch *ds, int port, |
927 | dsa_fdb_dump_cb_t *cb, void *data) |
928 | { |
929 | struct hellcreek *hellcreek = ds->priv; |
930 | u16 entries; |
931 | int ret = 0; |
932 | size_t i; |
933 | |
934 | mutex_lock(&hellcreek->reg_lock); |
935 | |
936 | /* Set read pointer to zero: The read of HR_FDBMAX (read-only register) |
937 | * should reset the internal pointer. But, that doesn't work. The vendor |
938 | * suggested a subsequent write as workaround. Same for HR_FDBRDH below. |
939 | */ |
940 | entries = hellcreek_read(hellcreek, HR_FDBMAX); |
941 | hellcreek_write(hellcreek, data: 0x00, HR_FDBMAX); |
942 | |
943 | dev_dbg(hellcreek->dev, "FDB dump for port %d, entries=%d!\n" , port, entries); |
944 | |
945 | /* Read table */ |
946 | for (i = 0; i < hellcreek->fdb_entries; ++i) { |
947 | struct hellcreek_fdb_entry entry = { 0 }; |
948 | |
949 | /* Read entry */ |
950 | hellcreek_populate_fdb_entry(hellcreek, entry: &entry, idx: i); |
951 | |
952 | /* Force next entry */ |
953 | hellcreek_write(hellcreek, data: 0x00, HR_FDBRDH); |
954 | |
955 | /* Check valid */ |
956 | if (is_zero_ether_addr(addr: entry.mac)) |
957 | continue; |
958 | |
959 | /* Check port mask */ |
960 | if (!(entry.portmask & BIT(port))) |
961 | continue; |
962 | |
963 | ret = cb(entry.mac, 0, entry.is_static, data); |
964 | if (ret) |
965 | break; |
966 | } |
967 | |
968 | mutex_unlock(lock: &hellcreek->reg_lock); |
969 | |
970 | return ret; |
971 | } |
972 | |
973 | static int hellcreek_vlan_filtering(struct dsa_switch *ds, int port, |
974 | bool vlan_filtering, |
975 | struct netlink_ext_ack *extack) |
976 | { |
977 | struct hellcreek *hellcreek = ds->priv; |
978 | |
979 | dev_dbg(hellcreek->dev, "%s VLAN filtering on port %d\n" , |
980 | vlan_filtering ? "Enable" : "Disable" , port); |
981 | |
982 | /* Configure port to drop packages with not known vids */ |
983 | hellcreek_setup_ingressflt(hellcreek, port, enable: vlan_filtering); |
984 | |
985 | /* Enable VLAN awareness on the switch. This save due to |
986 | * ds->vlan_filtering_is_global. |
987 | */ |
988 | hellcreek_setup_vlan_awareness(hellcreek, enable: vlan_filtering); |
989 | |
990 | return 0; |
991 | } |
992 | |
993 | static int hellcreek_enable_ip_core(struct hellcreek *hellcreek) |
994 | { |
995 | int ret; |
996 | u16 val; |
997 | |
998 | mutex_lock(&hellcreek->reg_lock); |
999 | |
1000 | val = hellcreek_read(hellcreek, HR_CTRL_C); |
1001 | val |= HR_CTRL_C_ENABLE; |
1002 | hellcreek_write(hellcreek, data: val, HR_CTRL_C); |
1003 | ret = hellcreek_wait_until_transitioned(hellcreek); |
1004 | |
1005 | mutex_unlock(lock: &hellcreek->reg_lock); |
1006 | |
1007 | return ret; |
1008 | } |
1009 | |
1010 | static void hellcreek_setup_cpu_and_tunnel_port(struct hellcreek *hellcreek) |
1011 | { |
1012 | struct hellcreek_port *tunnel_port = &hellcreek->ports[TUNNEL_PORT]; |
1013 | struct hellcreek_port *cpu_port = &hellcreek->ports[CPU_PORT]; |
1014 | u16 ptcfg = 0; |
1015 | |
1016 | ptcfg |= HR_PTCFG_LEARNING_EN | HR_PTCFG_ADMIN_EN; |
1017 | |
1018 | mutex_lock(&hellcreek->reg_lock); |
1019 | |
1020 | hellcreek_select_port(hellcreek, CPU_PORT); |
1021 | hellcreek_write(hellcreek, data: ptcfg, HR_PTCFG); |
1022 | |
1023 | hellcreek_select_port(hellcreek, TUNNEL_PORT); |
1024 | hellcreek_write(hellcreek, data: ptcfg, HR_PTCFG); |
1025 | |
1026 | cpu_port->ptcfg = ptcfg; |
1027 | tunnel_port->ptcfg = ptcfg; |
1028 | |
1029 | mutex_unlock(lock: &hellcreek->reg_lock); |
1030 | } |
1031 | |
1032 | static void hellcreek_setup_tc_identity_mapping(struct hellcreek *hellcreek) |
1033 | { |
1034 | int i; |
1035 | |
1036 | /* The switch has multiple egress queues per port. The queue is selected |
1037 | * via the PCP field in the VLAN header. The switch internally deals |
1038 | * with traffic classes instead of PCP values and this mapping is |
1039 | * configurable. |
1040 | * |
1041 | * The default mapping is (PCP - TC): |
1042 | * 7 - 7 |
1043 | * 6 - 6 |
1044 | * 5 - 5 |
1045 | * 4 - 4 |
1046 | * 3 - 3 |
1047 | * 2 - 1 |
1048 | * 1 - 0 |
1049 | * 0 - 2 |
1050 | * |
1051 | * The default should be an identity mapping. |
1052 | */ |
1053 | |
1054 | for (i = 0; i < 8; ++i) { |
1055 | mutex_lock(&hellcreek->reg_lock); |
1056 | |
1057 | hellcreek_select_prio(hellcreek, prio: i); |
1058 | hellcreek_write(hellcreek, |
1059 | data: i << HR_PRTCCFG_PCP_TC_MAP_SHIFT, |
1060 | HR_PRTCCFG); |
1061 | |
1062 | mutex_unlock(lock: &hellcreek->reg_lock); |
1063 | } |
1064 | } |
1065 | |
1066 | static int hellcreek_setup_fdb(struct hellcreek *hellcreek) |
1067 | { |
1068 | static struct hellcreek_fdb_entry l2_ptp = { |
1069 | /* MAC: 01-1B-19-00-00-00 */ |
1070 | .mac = { 0x01, 0x1b, 0x19, 0x00, 0x00, 0x00 }, |
1071 | .portmask = 0x03, /* Management ports */ |
1072 | .age = 0, |
1073 | .is_obt = 0, |
1074 | .pass_blocked = 0, |
1075 | .is_static = 1, |
1076 | .reprio_tc = 6, /* TC: 6 as per IEEE 802.1AS */ |
1077 | .reprio_en = 1, |
1078 | }; |
1079 | static struct hellcreek_fdb_entry udp4_ptp = { |
1080 | /* MAC: 01-00-5E-00-01-81 */ |
1081 | .mac = { 0x01, 0x00, 0x5e, 0x00, 0x01, 0x81 }, |
1082 | .portmask = 0x03, /* Management ports */ |
1083 | .age = 0, |
1084 | .is_obt = 0, |
1085 | .pass_blocked = 0, |
1086 | .is_static = 1, |
1087 | .reprio_tc = 6, |
1088 | .reprio_en = 1, |
1089 | }; |
1090 | static struct hellcreek_fdb_entry udp6_ptp = { |
1091 | /* MAC: 33-33-00-00-01-81 */ |
1092 | .mac = { 0x33, 0x33, 0x00, 0x00, 0x01, 0x81 }, |
1093 | .portmask = 0x03, /* Management ports */ |
1094 | .age = 0, |
1095 | .is_obt = 0, |
1096 | .pass_blocked = 0, |
1097 | .is_static = 1, |
1098 | .reprio_tc = 6, |
1099 | .reprio_en = 1, |
1100 | }; |
1101 | static struct hellcreek_fdb_entry l2_p2p = { |
1102 | /* MAC: 01-80-C2-00-00-0E */ |
1103 | .mac = { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x0e }, |
1104 | .portmask = 0x03, /* Management ports */ |
1105 | .age = 0, |
1106 | .is_obt = 0, |
1107 | .pass_blocked = 1, |
1108 | .is_static = 1, |
1109 | .reprio_tc = 6, /* TC: 6 as per IEEE 802.1AS */ |
1110 | .reprio_en = 1, |
1111 | }; |
1112 | static struct hellcreek_fdb_entry udp4_p2p = { |
1113 | /* MAC: 01-00-5E-00-00-6B */ |
1114 | .mac = { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x6b }, |
1115 | .portmask = 0x03, /* Management ports */ |
1116 | .age = 0, |
1117 | .is_obt = 0, |
1118 | .pass_blocked = 1, |
1119 | .is_static = 1, |
1120 | .reprio_tc = 6, |
1121 | .reprio_en = 1, |
1122 | }; |
1123 | static struct hellcreek_fdb_entry udp6_p2p = { |
1124 | /* MAC: 33-33-00-00-00-6B */ |
1125 | .mac = { 0x33, 0x33, 0x00, 0x00, 0x00, 0x6b }, |
1126 | .portmask = 0x03, /* Management ports */ |
1127 | .age = 0, |
1128 | .is_obt = 0, |
1129 | .pass_blocked = 1, |
1130 | .is_static = 1, |
1131 | .reprio_tc = 6, |
1132 | .reprio_en = 1, |
1133 | }; |
1134 | static struct hellcreek_fdb_entry stp = { |
1135 | /* MAC: 01-80-C2-00-00-00 */ |
1136 | .mac = { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x00 }, |
1137 | .portmask = 0x03, /* Management ports */ |
1138 | .age = 0, |
1139 | .is_obt = 0, |
1140 | .pass_blocked = 1, |
1141 | .is_static = 1, |
1142 | .reprio_tc = 6, |
1143 | .reprio_en = 1, |
1144 | }; |
1145 | int ret; |
1146 | |
1147 | mutex_lock(&hellcreek->reg_lock); |
1148 | ret = __hellcreek_fdb_add(hellcreek, entry: &l2_ptp); |
1149 | if (ret) |
1150 | goto out; |
1151 | ret = __hellcreek_fdb_add(hellcreek, entry: &udp4_ptp); |
1152 | if (ret) |
1153 | goto out; |
1154 | ret = __hellcreek_fdb_add(hellcreek, entry: &udp6_ptp); |
1155 | if (ret) |
1156 | goto out; |
1157 | ret = __hellcreek_fdb_add(hellcreek, entry: &l2_p2p); |
1158 | if (ret) |
1159 | goto out; |
1160 | ret = __hellcreek_fdb_add(hellcreek, entry: &udp4_p2p); |
1161 | if (ret) |
1162 | goto out; |
1163 | ret = __hellcreek_fdb_add(hellcreek, entry: &udp6_p2p); |
1164 | if (ret) |
1165 | goto out; |
1166 | ret = __hellcreek_fdb_add(hellcreek, entry: &stp); |
1167 | out: |
1168 | mutex_unlock(lock: &hellcreek->reg_lock); |
1169 | |
1170 | return ret; |
1171 | } |
1172 | |
1173 | static int hellcreek_devlink_info_get(struct dsa_switch *ds, |
1174 | struct devlink_info_req *req, |
1175 | struct netlink_ext_ack *extack) |
1176 | { |
1177 | struct hellcreek *hellcreek = ds->priv; |
1178 | |
1179 | return devlink_info_version_fixed_put(req, |
1180 | DEVLINK_INFO_VERSION_GENERIC_ASIC_ID, |
1181 | version_value: hellcreek->pdata->name); |
1182 | } |
1183 | |
1184 | static u64 hellcreek_devlink_vlan_table_get(void *priv) |
1185 | { |
1186 | struct hellcreek *hellcreek = priv; |
1187 | u64 count = 0; |
1188 | int i; |
1189 | |
1190 | mutex_lock(&hellcreek->reg_lock); |
1191 | for (i = 0; i < VLAN_N_VID; ++i) |
1192 | if (hellcreek->vidmbrcfg[i]) |
1193 | count++; |
1194 | mutex_unlock(lock: &hellcreek->reg_lock); |
1195 | |
1196 | return count; |
1197 | } |
1198 | |
1199 | static u64 hellcreek_devlink_fdb_table_get(void *priv) |
1200 | { |
1201 | struct hellcreek *hellcreek = priv; |
1202 | u64 count = 0; |
1203 | |
1204 | /* Reading this register has side effects. Synchronize against the other |
1205 | * FDB operations. |
1206 | */ |
1207 | mutex_lock(&hellcreek->reg_lock); |
1208 | count = hellcreek_read(hellcreek, HR_FDBMAX); |
1209 | mutex_unlock(lock: &hellcreek->reg_lock); |
1210 | |
1211 | return count; |
1212 | } |
1213 | |
1214 | static int hellcreek_setup_devlink_resources(struct dsa_switch *ds) |
1215 | { |
1216 | struct devlink_resource_size_params size_vlan_params; |
1217 | struct devlink_resource_size_params size_fdb_params; |
1218 | struct hellcreek *hellcreek = ds->priv; |
1219 | int err; |
1220 | |
1221 | devlink_resource_size_params_init(size_params: &size_vlan_params, VLAN_N_VID, |
1222 | VLAN_N_VID, |
1223 | size_granularity: 1, unit: DEVLINK_RESOURCE_UNIT_ENTRY); |
1224 | |
1225 | devlink_resource_size_params_init(size_params: &size_fdb_params, |
1226 | size_min: hellcreek->fdb_entries, |
1227 | size_max: hellcreek->fdb_entries, |
1228 | size_granularity: 1, unit: DEVLINK_RESOURCE_UNIT_ENTRY); |
1229 | |
1230 | err = dsa_devlink_resource_register(ds, resource_name: "VLAN" , VLAN_N_VID, |
1231 | resource_id: HELLCREEK_DEVLINK_PARAM_ID_VLAN_TABLE, |
1232 | DEVLINK_RESOURCE_ID_PARENT_TOP, |
1233 | size_params: &size_vlan_params); |
1234 | if (err) |
1235 | goto out; |
1236 | |
1237 | err = dsa_devlink_resource_register(ds, resource_name: "FDB" , resource_size: hellcreek->fdb_entries, |
1238 | resource_id: HELLCREEK_DEVLINK_PARAM_ID_FDB_TABLE, |
1239 | DEVLINK_RESOURCE_ID_PARENT_TOP, |
1240 | size_params: &size_fdb_params); |
1241 | if (err) |
1242 | goto out; |
1243 | |
1244 | dsa_devlink_resource_occ_get_register(ds, |
1245 | resource_id: HELLCREEK_DEVLINK_PARAM_ID_VLAN_TABLE, |
1246 | occ_get: hellcreek_devlink_vlan_table_get, |
1247 | occ_get_priv: hellcreek); |
1248 | |
1249 | dsa_devlink_resource_occ_get_register(ds, |
1250 | resource_id: HELLCREEK_DEVLINK_PARAM_ID_FDB_TABLE, |
1251 | occ_get: hellcreek_devlink_fdb_table_get, |
1252 | occ_get_priv: hellcreek); |
1253 | |
1254 | return 0; |
1255 | |
1256 | out: |
1257 | dsa_devlink_resources_unregister(ds); |
1258 | |
1259 | return err; |
1260 | } |
1261 | |
1262 | static int hellcreek_devlink_region_vlan_snapshot(struct devlink *dl, |
1263 | const struct devlink_region_ops *ops, |
1264 | struct netlink_ext_ack *extack, |
1265 | u8 **data) |
1266 | { |
1267 | struct hellcreek_devlink_vlan_entry *table, *entry; |
1268 | struct dsa_switch *ds = dsa_devlink_to_ds(dl); |
1269 | struct hellcreek *hellcreek = ds->priv; |
1270 | int i; |
1271 | |
1272 | table = kcalloc(VLAN_N_VID, size: sizeof(*entry), GFP_KERNEL); |
1273 | if (!table) |
1274 | return -ENOMEM; |
1275 | |
1276 | entry = table; |
1277 | |
1278 | mutex_lock(&hellcreek->reg_lock); |
1279 | for (i = 0; i < VLAN_N_VID; ++i, ++entry) { |
1280 | entry->member = hellcreek->vidmbrcfg[i]; |
1281 | entry->vid = i; |
1282 | } |
1283 | mutex_unlock(lock: &hellcreek->reg_lock); |
1284 | |
1285 | *data = (u8 *)table; |
1286 | |
1287 | return 0; |
1288 | } |
1289 | |
1290 | static int hellcreek_devlink_region_fdb_snapshot(struct devlink *dl, |
1291 | const struct devlink_region_ops *ops, |
1292 | struct netlink_ext_ack *extack, |
1293 | u8 **data) |
1294 | { |
1295 | struct dsa_switch *ds = dsa_devlink_to_ds(dl); |
1296 | struct hellcreek_fdb_entry *table, *entry; |
1297 | struct hellcreek *hellcreek = ds->priv; |
1298 | size_t i; |
1299 | |
1300 | table = kcalloc(n: hellcreek->fdb_entries, size: sizeof(*entry), GFP_KERNEL); |
1301 | if (!table) |
1302 | return -ENOMEM; |
1303 | |
1304 | entry = table; |
1305 | |
1306 | mutex_lock(&hellcreek->reg_lock); |
1307 | |
1308 | /* Start table read */ |
1309 | hellcreek_read(hellcreek, HR_FDBMAX); |
1310 | hellcreek_write(hellcreek, data: 0x00, HR_FDBMAX); |
1311 | |
1312 | for (i = 0; i < hellcreek->fdb_entries; ++i, ++entry) { |
1313 | /* Read current entry */ |
1314 | hellcreek_populate_fdb_entry(hellcreek, entry, idx: i); |
1315 | |
1316 | /* Advance read pointer */ |
1317 | hellcreek_write(hellcreek, data: 0x00, HR_FDBRDH); |
1318 | } |
1319 | |
1320 | mutex_unlock(lock: &hellcreek->reg_lock); |
1321 | |
1322 | *data = (u8 *)table; |
1323 | |
1324 | return 0; |
1325 | } |
1326 | |
1327 | static struct devlink_region_ops hellcreek_region_vlan_ops = { |
1328 | .name = "vlan" , |
1329 | .snapshot = hellcreek_devlink_region_vlan_snapshot, |
1330 | .destructor = kfree, |
1331 | }; |
1332 | |
1333 | static struct devlink_region_ops hellcreek_region_fdb_ops = { |
1334 | .name = "fdb" , |
1335 | .snapshot = hellcreek_devlink_region_fdb_snapshot, |
1336 | .destructor = kfree, |
1337 | }; |
1338 | |
1339 | static int hellcreek_setup_devlink_regions(struct dsa_switch *ds) |
1340 | { |
1341 | struct hellcreek *hellcreek = ds->priv; |
1342 | struct devlink_region_ops *ops; |
1343 | struct devlink_region *region; |
1344 | u64 size; |
1345 | int ret; |
1346 | |
1347 | /* VLAN table */ |
1348 | size = VLAN_N_VID * sizeof(struct hellcreek_devlink_vlan_entry); |
1349 | ops = &hellcreek_region_vlan_ops; |
1350 | |
1351 | region = dsa_devlink_region_create(ds, ops, region_max_snapshots: 1, region_size: size); |
1352 | if (IS_ERR(ptr: region)) |
1353 | return PTR_ERR(ptr: region); |
1354 | |
1355 | hellcreek->vlan_region = region; |
1356 | |
1357 | /* FDB table */ |
1358 | size = hellcreek->fdb_entries * sizeof(struct hellcreek_fdb_entry); |
1359 | ops = &hellcreek_region_fdb_ops; |
1360 | |
1361 | region = dsa_devlink_region_create(ds, ops, region_max_snapshots: 1, region_size: size); |
1362 | if (IS_ERR(ptr: region)) { |
1363 | ret = PTR_ERR(ptr: region); |
1364 | goto err_fdb; |
1365 | } |
1366 | |
1367 | hellcreek->fdb_region = region; |
1368 | |
1369 | return 0; |
1370 | |
1371 | err_fdb: |
1372 | dsa_devlink_region_destroy(region: hellcreek->vlan_region); |
1373 | |
1374 | return ret; |
1375 | } |
1376 | |
1377 | static void hellcreek_teardown_devlink_regions(struct dsa_switch *ds) |
1378 | { |
1379 | struct hellcreek *hellcreek = ds->priv; |
1380 | |
1381 | dsa_devlink_region_destroy(region: hellcreek->fdb_region); |
1382 | dsa_devlink_region_destroy(region: hellcreek->vlan_region); |
1383 | } |
1384 | |
1385 | static int hellcreek_setup(struct dsa_switch *ds) |
1386 | { |
1387 | struct hellcreek *hellcreek = ds->priv; |
1388 | u16 swcfg = 0; |
1389 | int ret, i; |
1390 | |
1391 | dev_dbg(hellcreek->dev, "Set up the switch\n" ); |
1392 | |
1393 | /* Let's go */ |
1394 | ret = hellcreek_enable_ip_core(hellcreek); |
1395 | if (ret) { |
1396 | dev_err(hellcreek->dev, "Failed to enable IP core!\n" ); |
1397 | return ret; |
1398 | } |
1399 | |
1400 | /* Enable CPU/Tunnel ports */ |
1401 | hellcreek_setup_cpu_and_tunnel_port(hellcreek); |
1402 | |
1403 | /* Switch config: Keep defaults, enable FDB aging and learning and tag |
1404 | * each frame from/to cpu port for DSA tagging. Also enable the length |
1405 | * aware shaping mode. This eliminates the need for Qbv guard bands. |
1406 | */ |
1407 | swcfg |= HR_SWCFG_FDBAGE_EN | |
1408 | HR_SWCFG_FDBLRN_EN | |
1409 | HR_SWCFG_ALWAYS_OBT | |
1410 | (HR_SWCFG_LAS_ON << HR_SWCFG_LAS_MODE_SHIFT); |
1411 | hellcreek->swcfg = swcfg; |
1412 | hellcreek_write(hellcreek, data: swcfg, HR_SWCFG); |
1413 | |
1414 | /* Initial vlan membership to reflect port separation */ |
1415 | for (i = 0; i < ds->num_ports; ++i) { |
1416 | if (!dsa_is_user_port(ds, p: i)) |
1417 | continue; |
1418 | |
1419 | hellcreek_setup_vlan_membership(ds, port: i, enabled: true); |
1420 | } |
1421 | |
1422 | /* Configure PCP <-> TC mapping */ |
1423 | hellcreek_setup_tc_identity_mapping(hellcreek); |
1424 | |
1425 | /* The VLAN awareness is a global switch setting. Therefore, mixed vlan |
1426 | * filtering setups are not supported. |
1427 | */ |
1428 | ds->vlan_filtering_is_global = true; |
1429 | ds->needs_standalone_vlan_filtering = true; |
1430 | |
1431 | /* Intercept _all_ PTP multicast traffic */ |
1432 | ret = hellcreek_setup_fdb(hellcreek); |
1433 | if (ret) { |
1434 | dev_err(hellcreek->dev, |
1435 | "Failed to insert static PTP FDB entries\n" ); |
1436 | return ret; |
1437 | } |
1438 | |
1439 | /* Register devlink resources with DSA */ |
1440 | ret = hellcreek_setup_devlink_resources(ds); |
1441 | if (ret) { |
1442 | dev_err(hellcreek->dev, |
1443 | "Failed to setup devlink resources!\n" ); |
1444 | return ret; |
1445 | } |
1446 | |
1447 | ret = hellcreek_setup_devlink_regions(ds); |
1448 | if (ret) { |
1449 | dev_err(hellcreek->dev, |
1450 | "Failed to setup devlink regions!\n" ); |
1451 | goto err_regions; |
1452 | } |
1453 | |
1454 | return 0; |
1455 | |
1456 | err_regions: |
1457 | dsa_devlink_resources_unregister(ds); |
1458 | |
1459 | return ret; |
1460 | } |
1461 | |
1462 | static void hellcreek_teardown(struct dsa_switch *ds) |
1463 | { |
1464 | hellcreek_teardown_devlink_regions(ds); |
1465 | dsa_devlink_resources_unregister(ds); |
1466 | } |
1467 | |
1468 | static void hellcreek_phylink_get_caps(struct dsa_switch *ds, int port, |
1469 | struct phylink_config *config) |
1470 | { |
1471 | struct hellcreek *hellcreek = ds->priv; |
1472 | |
1473 | __set_bit(PHY_INTERFACE_MODE_MII, config->supported_interfaces); |
1474 | __set_bit(PHY_INTERFACE_MODE_RGMII, config->supported_interfaces); |
1475 | |
1476 | /* Include GMII - the hardware does not support this interface |
1477 | * mode, but it's the default interface mode for phylib, so we |
1478 | * need it for compatibility with existing DT. |
1479 | */ |
1480 | __set_bit(PHY_INTERFACE_MODE_GMII, config->supported_interfaces); |
1481 | |
1482 | /* The MAC settings are a hardware configuration option and cannot be |
1483 | * changed at run time or by strapping. Therefore the attached PHYs |
1484 | * should be programmed to only advertise settings which are supported |
1485 | * by the hardware. |
1486 | */ |
1487 | if (hellcreek->pdata->is_100_mbits) |
1488 | config->mac_capabilities = MAC_100FD; |
1489 | else |
1490 | config->mac_capabilities = MAC_1000FD; |
1491 | } |
1492 | |
1493 | static int |
1494 | hellcreek_port_prechangeupper(struct dsa_switch *ds, int port, |
1495 | struct netdev_notifier_changeupper_info *info) |
1496 | { |
1497 | struct hellcreek *hellcreek = ds->priv; |
1498 | bool used = true; |
1499 | int ret = -EBUSY; |
1500 | u16 vid; |
1501 | int i; |
1502 | |
1503 | dev_dbg(hellcreek->dev, "Pre change upper for port %d\n" , port); |
1504 | |
1505 | /* |
1506 | * Deny VLAN devices on top of lan ports with the same VLAN ids, because |
1507 | * it breaks the port separation due to the private VLANs. Example: |
1508 | * |
1509 | * lan0.100 *and* lan1.100 cannot be used in parallel. However, lan0.99 |
1510 | * and lan1.100 works. |
1511 | */ |
1512 | |
1513 | if (!is_vlan_dev(dev: info->upper_dev)) |
1514 | return 0; |
1515 | |
1516 | vid = vlan_dev_vlan_id(dev: info->upper_dev); |
1517 | |
1518 | /* For all ports, check bitmaps */ |
1519 | mutex_lock(&hellcreek->vlan_lock); |
1520 | for (i = 0; i < hellcreek->pdata->num_ports; ++i) { |
1521 | if (!dsa_is_user_port(ds, p: i)) |
1522 | continue; |
1523 | |
1524 | if (port == i) |
1525 | continue; |
1526 | |
1527 | used = used && test_bit(vid, hellcreek->ports[i].vlan_dev_bitmap); |
1528 | } |
1529 | |
1530 | if (used) |
1531 | goto out; |
1532 | |
1533 | /* Update bitmap */ |
1534 | set_bit(nr: vid, addr: hellcreek->ports[port].vlan_dev_bitmap); |
1535 | |
1536 | ret = 0; |
1537 | |
1538 | out: |
1539 | mutex_unlock(lock: &hellcreek->vlan_lock); |
1540 | |
1541 | return ret; |
1542 | } |
1543 | |
1544 | static void hellcreek_setup_maxsdu(struct hellcreek *hellcreek, int port, |
1545 | const struct tc_taprio_qopt_offload *schedule) |
1546 | { |
1547 | int tc; |
1548 | |
1549 | for (tc = 0; tc < 8; ++tc) { |
1550 | u32 max_sdu = schedule->max_sdu[tc] + VLAN_ETH_HLEN - ETH_FCS_LEN; |
1551 | u16 val; |
1552 | |
1553 | if (!schedule->max_sdu[tc]) |
1554 | continue; |
1555 | |
1556 | dev_dbg(hellcreek->dev, "Configure max-sdu %u for tc %d on port %d\n" , |
1557 | max_sdu, tc, port); |
1558 | |
1559 | hellcreek_select_port_prio(hellcreek, port, prio: tc); |
1560 | |
1561 | val = (max_sdu & HR_PTPRTCCFG_MAXSDU_MASK) << HR_PTPRTCCFG_MAXSDU_SHIFT; |
1562 | |
1563 | hellcreek_write(hellcreek, data: val, HR_PTPRTCCFG); |
1564 | } |
1565 | } |
1566 | |
1567 | static void hellcreek_reset_maxsdu(struct hellcreek *hellcreek, int port) |
1568 | { |
1569 | int tc; |
1570 | |
1571 | for (tc = 0; tc < 8; ++tc) { |
1572 | u16 val; |
1573 | |
1574 | hellcreek_select_port_prio(hellcreek, port, prio: tc); |
1575 | |
1576 | val = (HELLCREEK_DEFAULT_MAX_SDU & HR_PTPRTCCFG_MAXSDU_MASK) |
1577 | << HR_PTPRTCCFG_MAXSDU_SHIFT; |
1578 | |
1579 | hellcreek_write(hellcreek, data: val, HR_PTPRTCCFG); |
1580 | } |
1581 | } |
1582 | |
1583 | static void hellcreek_setup_gcl(struct hellcreek *hellcreek, int port, |
1584 | const struct tc_taprio_qopt_offload *schedule) |
1585 | { |
1586 | const struct tc_taprio_sched_entry *cur, *initial, *next; |
1587 | size_t i; |
1588 | |
1589 | cur = initial = &schedule->entries[0]; |
1590 | next = cur + 1; |
1591 | |
1592 | for (i = 1; i <= schedule->num_entries; ++i) { |
1593 | u16 data; |
1594 | u8 gates; |
1595 | |
1596 | if (i == schedule->num_entries) |
1597 | gates = initial->gate_mask ^ |
1598 | cur->gate_mask; |
1599 | else |
1600 | gates = next->gate_mask ^ |
1601 | cur->gate_mask; |
1602 | |
1603 | data = gates; |
1604 | |
1605 | if (i == schedule->num_entries) |
1606 | data |= TR_GCLDAT_GCLWRLAST; |
1607 | |
1608 | /* Gates states */ |
1609 | hellcreek_write(hellcreek, data, TR_GCLDAT); |
1610 | |
1611 | /* Time interval */ |
1612 | hellcreek_write(hellcreek, |
1613 | data: cur->interval & 0x0000ffff, |
1614 | TR_GCLTIL); |
1615 | hellcreek_write(hellcreek, |
1616 | data: (cur->interval & 0xffff0000) >> 16, |
1617 | TR_GCLTIH); |
1618 | |
1619 | /* Commit entry */ |
1620 | data = ((i - 1) << TR_GCLCMD_GCLWRADR_SHIFT) | |
1621 | (initial->gate_mask << |
1622 | TR_GCLCMD_INIT_GATE_STATES_SHIFT); |
1623 | hellcreek_write(hellcreek, data, TR_GCLCMD); |
1624 | |
1625 | cur++; |
1626 | next++; |
1627 | } |
1628 | } |
1629 | |
1630 | static void hellcreek_set_cycle_time(struct hellcreek *hellcreek, |
1631 | const struct tc_taprio_qopt_offload *schedule) |
1632 | { |
1633 | u32 cycle_time = schedule->cycle_time; |
1634 | |
1635 | hellcreek_write(hellcreek, data: cycle_time & 0x0000ffff, TR_CTWRL); |
1636 | hellcreek_write(hellcreek, data: (cycle_time & 0xffff0000) >> 16, TR_CTWRH); |
1637 | } |
1638 | |
1639 | static void hellcreek_switch_schedule(struct hellcreek *hellcreek, |
1640 | ktime_t start_time) |
1641 | { |
1642 | struct timespec64 ts = ktime_to_timespec64(start_time); |
1643 | |
1644 | /* Start schedule at this point of time */ |
1645 | hellcreek_write(hellcreek, data: ts.tv_nsec & 0x0000ffff, TR_ESTWRL); |
1646 | hellcreek_write(hellcreek, data: (ts.tv_nsec & 0xffff0000) >> 16, TR_ESTWRH); |
1647 | |
1648 | /* Arm timer, set seconds and switch schedule */ |
1649 | hellcreek_write(hellcreek, TR_ESTCMD_ESTARM | TR_ESTCMD_ESTSWCFG | |
1650 | ((ts.tv_sec & TR_ESTCMD_ESTSEC_MASK) << |
1651 | TR_ESTCMD_ESTSEC_SHIFT), TR_ESTCMD); |
1652 | } |
1653 | |
1654 | static bool hellcreek_schedule_startable(struct hellcreek *hellcreek, int port) |
1655 | { |
1656 | struct hellcreek_port *hellcreek_port = &hellcreek->ports[port]; |
1657 | s64 base_time_ns, current_ns; |
1658 | |
1659 | /* The switch allows a schedule to be started only eight seconds within |
1660 | * the future. Therefore, check the current PTP time if the schedule is |
1661 | * startable or not. |
1662 | */ |
1663 | |
1664 | /* Use the "cached" time. That should be alright, as it's updated quite |
1665 | * frequently in the PTP code. |
1666 | */ |
1667 | mutex_lock(&hellcreek->ptp_lock); |
1668 | current_ns = hellcreek->seconds * NSEC_PER_SEC + hellcreek->last_ts; |
1669 | mutex_unlock(lock: &hellcreek->ptp_lock); |
1670 | |
1671 | /* Calculate difference to admin base time */ |
1672 | base_time_ns = ktime_to_ns(kt: hellcreek_port->current_schedule->base_time); |
1673 | |
1674 | return base_time_ns - current_ns < (s64)4 * NSEC_PER_SEC; |
1675 | } |
1676 | |
1677 | static void hellcreek_start_schedule(struct hellcreek *hellcreek, int port) |
1678 | { |
1679 | struct hellcreek_port *hellcreek_port = &hellcreek->ports[port]; |
1680 | ktime_t base_time, current_time; |
1681 | s64 current_ns; |
1682 | u32 cycle_time; |
1683 | |
1684 | /* First select port */ |
1685 | hellcreek_select_tgd(hellcreek, port); |
1686 | |
1687 | /* Forward base time into the future if needed */ |
1688 | mutex_lock(&hellcreek->ptp_lock); |
1689 | current_ns = hellcreek->seconds * NSEC_PER_SEC + hellcreek->last_ts; |
1690 | mutex_unlock(lock: &hellcreek->ptp_lock); |
1691 | |
1692 | current_time = ns_to_ktime(ns: current_ns); |
1693 | base_time = hellcreek_port->current_schedule->base_time; |
1694 | cycle_time = hellcreek_port->current_schedule->cycle_time; |
1695 | |
1696 | if (ktime_compare(cmp1: current_time, cmp2: base_time) > 0) { |
1697 | s64 n; |
1698 | |
1699 | n = div64_s64(ktime_sub_ns(current_time, base_time), |
1700 | divisor: cycle_time); |
1701 | base_time = ktime_add_ns(base_time, (n + 1) * cycle_time); |
1702 | } |
1703 | |
1704 | /* Set admin base time and switch schedule */ |
1705 | hellcreek_switch_schedule(hellcreek, start_time: base_time); |
1706 | |
1707 | taprio_offload_free(offload: hellcreek_port->current_schedule); |
1708 | hellcreek_port->current_schedule = NULL; |
1709 | |
1710 | dev_dbg(hellcreek->dev, "Armed EST timer for port %d\n" , |
1711 | hellcreek_port->port); |
1712 | } |
1713 | |
1714 | static void hellcreek_check_schedule(struct work_struct *work) |
1715 | { |
1716 | struct delayed_work *dw = to_delayed_work(work); |
1717 | struct hellcreek_port *hellcreek_port; |
1718 | struct hellcreek *hellcreek; |
1719 | bool startable; |
1720 | |
1721 | hellcreek_port = dw_to_hellcreek_port(dw); |
1722 | hellcreek = hellcreek_port->hellcreek; |
1723 | |
1724 | mutex_lock(&hellcreek->reg_lock); |
1725 | |
1726 | /* Check starting time */ |
1727 | startable = hellcreek_schedule_startable(hellcreek, |
1728 | port: hellcreek_port->port); |
1729 | if (startable) { |
1730 | hellcreek_start_schedule(hellcreek, port: hellcreek_port->port); |
1731 | mutex_unlock(lock: &hellcreek->reg_lock); |
1732 | return; |
1733 | } |
1734 | |
1735 | mutex_unlock(lock: &hellcreek->reg_lock); |
1736 | |
1737 | /* Reschedule */ |
1738 | schedule_delayed_work(dwork: &hellcreek_port->schedule_work, |
1739 | HELLCREEK_SCHEDULE_PERIOD); |
1740 | } |
1741 | |
1742 | static int hellcreek_port_set_schedule(struct dsa_switch *ds, int port, |
1743 | struct tc_taprio_qopt_offload *taprio) |
1744 | { |
1745 | struct hellcreek *hellcreek = ds->priv; |
1746 | struct hellcreek_port *hellcreek_port; |
1747 | bool startable; |
1748 | u16 ctrl; |
1749 | |
1750 | hellcreek_port = &hellcreek->ports[port]; |
1751 | |
1752 | dev_dbg(hellcreek->dev, "Configure traffic schedule on port %d\n" , |
1753 | port); |
1754 | |
1755 | /* First cancel delayed work */ |
1756 | cancel_delayed_work_sync(dwork: &hellcreek_port->schedule_work); |
1757 | |
1758 | mutex_lock(&hellcreek->reg_lock); |
1759 | |
1760 | if (hellcreek_port->current_schedule) { |
1761 | taprio_offload_free(offload: hellcreek_port->current_schedule); |
1762 | hellcreek_port->current_schedule = NULL; |
1763 | } |
1764 | hellcreek_port->current_schedule = taprio_offload_get(offload: taprio); |
1765 | |
1766 | /* Configure max sdu */ |
1767 | hellcreek_setup_maxsdu(hellcreek, port, schedule: hellcreek_port->current_schedule); |
1768 | |
1769 | /* Select tdg */ |
1770 | hellcreek_select_tgd(hellcreek, port); |
1771 | |
1772 | /* Enable gating and keep defaults */ |
1773 | ctrl = (0xff << TR_TGDCTRL_ADMINGATESTATES_SHIFT) | TR_TGDCTRL_GATE_EN; |
1774 | hellcreek_write(hellcreek, data: ctrl, TR_TGDCTRL); |
1775 | |
1776 | /* Cancel pending schedule */ |
1777 | hellcreek_write(hellcreek, data: 0x00, TR_ESTCMD); |
1778 | |
1779 | /* Setup a new schedule */ |
1780 | hellcreek_setup_gcl(hellcreek, port, schedule: hellcreek_port->current_schedule); |
1781 | |
1782 | /* Configure cycle time */ |
1783 | hellcreek_set_cycle_time(hellcreek, schedule: hellcreek_port->current_schedule); |
1784 | |
1785 | /* Check starting time */ |
1786 | startable = hellcreek_schedule_startable(hellcreek, port); |
1787 | if (startable) { |
1788 | hellcreek_start_schedule(hellcreek, port); |
1789 | mutex_unlock(lock: &hellcreek->reg_lock); |
1790 | return 0; |
1791 | } |
1792 | |
1793 | mutex_unlock(lock: &hellcreek->reg_lock); |
1794 | |
1795 | /* Schedule periodic schedule check */ |
1796 | schedule_delayed_work(dwork: &hellcreek_port->schedule_work, |
1797 | HELLCREEK_SCHEDULE_PERIOD); |
1798 | |
1799 | return 0; |
1800 | } |
1801 | |
1802 | static int hellcreek_port_del_schedule(struct dsa_switch *ds, int port) |
1803 | { |
1804 | struct hellcreek *hellcreek = ds->priv; |
1805 | struct hellcreek_port *hellcreek_port; |
1806 | |
1807 | hellcreek_port = &hellcreek->ports[port]; |
1808 | |
1809 | dev_dbg(hellcreek->dev, "Remove traffic schedule on port %d\n" , port); |
1810 | |
1811 | /* First cancel delayed work */ |
1812 | cancel_delayed_work_sync(dwork: &hellcreek_port->schedule_work); |
1813 | |
1814 | mutex_lock(&hellcreek->reg_lock); |
1815 | |
1816 | if (hellcreek_port->current_schedule) { |
1817 | taprio_offload_free(offload: hellcreek_port->current_schedule); |
1818 | hellcreek_port->current_schedule = NULL; |
1819 | } |
1820 | |
1821 | /* Reset max sdu */ |
1822 | hellcreek_reset_maxsdu(hellcreek, port); |
1823 | |
1824 | /* Select tgd */ |
1825 | hellcreek_select_tgd(hellcreek, port); |
1826 | |
1827 | /* Disable gating and return to regular switching flow */ |
1828 | hellcreek_write(hellcreek, data: 0xff << TR_TGDCTRL_ADMINGATESTATES_SHIFT, |
1829 | TR_TGDCTRL); |
1830 | |
1831 | mutex_unlock(lock: &hellcreek->reg_lock); |
1832 | |
1833 | return 0; |
1834 | } |
1835 | |
1836 | static bool hellcreek_validate_schedule(struct hellcreek *hellcreek, |
1837 | struct tc_taprio_qopt_offload *schedule) |
1838 | { |
1839 | size_t i; |
1840 | |
1841 | /* Does this hellcreek version support Qbv in hardware? */ |
1842 | if (!hellcreek->pdata->qbv_support) |
1843 | return false; |
1844 | |
1845 | /* cycle time can only be 32bit */ |
1846 | if (schedule->cycle_time > (u32)-1) |
1847 | return false; |
1848 | |
1849 | /* cycle time extension is not supported */ |
1850 | if (schedule->cycle_time_extension) |
1851 | return false; |
1852 | |
1853 | /* Only set command is supported */ |
1854 | for (i = 0; i < schedule->num_entries; ++i) |
1855 | if (schedule->entries[i].command != TC_TAPRIO_CMD_SET_GATES) |
1856 | return false; |
1857 | |
1858 | return true; |
1859 | } |
1860 | |
1861 | static int hellcreek_tc_query_caps(struct tc_query_caps_base *base) |
1862 | { |
1863 | switch (base->type) { |
1864 | case TC_SETUP_QDISC_TAPRIO: { |
1865 | struct tc_taprio_caps *caps = base->caps; |
1866 | |
1867 | caps->supports_queue_max_sdu = true; |
1868 | |
1869 | return 0; |
1870 | } |
1871 | default: |
1872 | return -EOPNOTSUPP; |
1873 | } |
1874 | } |
1875 | |
1876 | static int hellcreek_port_setup_tc(struct dsa_switch *ds, int port, |
1877 | enum tc_setup_type type, void *type_data) |
1878 | { |
1879 | struct hellcreek *hellcreek = ds->priv; |
1880 | |
1881 | switch (type) { |
1882 | case TC_QUERY_CAPS: |
1883 | return hellcreek_tc_query_caps(base: type_data); |
1884 | case TC_SETUP_QDISC_TAPRIO: { |
1885 | struct tc_taprio_qopt_offload *taprio = type_data; |
1886 | |
1887 | switch (taprio->cmd) { |
1888 | case TAPRIO_CMD_REPLACE: |
1889 | if (!hellcreek_validate_schedule(hellcreek, schedule: taprio)) |
1890 | return -EOPNOTSUPP; |
1891 | |
1892 | return hellcreek_port_set_schedule(ds, port, taprio); |
1893 | case TAPRIO_CMD_DESTROY: |
1894 | return hellcreek_port_del_schedule(ds, port); |
1895 | default: |
1896 | return -EOPNOTSUPP; |
1897 | } |
1898 | } |
1899 | default: |
1900 | return -EOPNOTSUPP; |
1901 | } |
1902 | } |
1903 | |
1904 | static const struct dsa_switch_ops hellcreek_ds_ops = { |
1905 | .devlink_info_get = hellcreek_devlink_info_get, |
1906 | .get_ethtool_stats = hellcreek_get_ethtool_stats, |
1907 | .get_sset_count = hellcreek_get_sset_count, |
1908 | .get_strings = hellcreek_get_strings, |
1909 | .get_tag_protocol = hellcreek_get_tag_protocol, |
1910 | .get_ts_info = hellcreek_get_ts_info, |
1911 | .phylink_get_caps = hellcreek_phylink_get_caps, |
1912 | .port_bridge_flags = hellcreek_bridge_flags, |
1913 | .port_bridge_join = hellcreek_port_bridge_join, |
1914 | .port_bridge_leave = hellcreek_port_bridge_leave, |
1915 | .port_disable = hellcreek_port_disable, |
1916 | .port_enable = hellcreek_port_enable, |
1917 | .port_fdb_add = hellcreek_fdb_add, |
1918 | .port_fdb_del = hellcreek_fdb_del, |
1919 | .port_fdb_dump = hellcreek_fdb_dump, |
1920 | .port_hwtstamp_set = hellcreek_port_hwtstamp_set, |
1921 | .port_hwtstamp_get = hellcreek_port_hwtstamp_get, |
1922 | .port_pre_bridge_flags = hellcreek_pre_bridge_flags, |
1923 | .port_prechangeupper = hellcreek_port_prechangeupper, |
1924 | .port_rxtstamp = hellcreek_port_rxtstamp, |
1925 | .port_setup_tc = hellcreek_port_setup_tc, |
1926 | .port_stp_state_set = hellcreek_port_stp_state_set, |
1927 | .port_txtstamp = hellcreek_port_txtstamp, |
1928 | .port_vlan_add = hellcreek_vlan_add, |
1929 | .port_vlan_del = hellcreek_vlan_del, |
1930 | .port_vlan_filtering = hellcreek_vlan_filtering, |
1931 | .setup = hellcreek_setup, |
1932 | .teardown = hellcreek_teardown, |
1933 | }; |
1934 | |
1935 | static int hellcreek_probe(struct platform_device *pdev) |
1936 | { |
1937 | struct device *dev = &pdev->dev; |
1938 | struct hellcreek *hellcreek; |
1939 | struct resource *res; |
1940 | int ret, i; |
1941 | |
1942 | hellcreek = devm_kzalloc(dev, size: sizeof(*hellcreek), GFP_KERNEL); |
1943 | if (!hellcreek) |
1944 | return -ENOMEM; |
1945 | |
1946 | hellcreek->vidmbrcfg = devm_kcalloc(dev, VLAN_N_VID, |
1947 | size: sizeof(*hellcreek->vidmbrcfg), |
1948 | GFP_KERNEL); |
1949 | if (!hellcreek->vidmbrcfg) |
1950 | return -ENOMEM; |
1951 | |
1952 | hellcreek->pdata = of_device_get_match_data(dev); |
1953 | |
1954 | hellcreek->ports = devm_kcalloc(dev, n: hellcreek->pdata->num_ports, |
1955 | size: sizeof(*hellcreek->ports), |
1956 | GFP_KERNEL); |
1957 | if (!hellcreek->ports) |
1958 | return -ENOMEM; |
1959 | |
1960 | for (i = 0; i < hellcreek->pdata->num_ports; ++i) { |
1961 | struct hellcreek_port *port = &hellcreek->ports[i]; |
1962 | |
1963 | port->counter_values = |
1964 | devm_kcalloc(dev, |
1965 | ARRAY_SIZE(hellcreek_counter), |
1966 | size: sizeof(*port->counter_values), |
1967 | GFP_KERNEL); |
1968 | if (!port->counter_values) |
1969 | return -ENOMEM; |
1970 | |
1971 | port->vlan_dev_bitmap = devm_bitmap_zalloc(dev, VLAN_N_VID, |
1972 | GFP_KERNEL); |
1973 | if (!port->vlan_dev_bitmap) |
1974 | return -ENOMEM; |
1975 | |
1976 | port->hellcreek = hellcreek; |
1977 | port->port = i; |
1978 | |
1979 | INIT_DELAYED_WORK(&port->schedule_work, |
1980 | hellcreek_check_schedule); |
1981 | } |
1982 | |
1983 | mutex_init(&hellcreek->reg_lock); |
1984 | mutex_init(&hellcreek->vlan_lock); |
1985 | mutex_init(&hellcreek->ptp_lock); |
1986 | |
1987 | hellcreek->dev = dev; |
1988 | |
1989 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "tsn" ); |
1990 | if (!res) { |
1991 | dev_err(dev, "No memory region provided!\n" ); |
1992 | return -ENODEV; |
1993 | } |
1994 | |
1995 | hellcreek->base = devm_ioremap_resource(dev, res); |
1996 | if (IS_ERR(ptr: hellcreek->base)) |
1997 | return PTR_ERR(ptr: hellcreek->base); |
1998 | |
1999 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ptp" ); |
2000 | if (!res) { |
2001 | dev_err(dev, "No PTP memory region provided!\n" ); |
2002 | return -ENODEV; |
2003 | } |
2004 | |
2005 | hellcreek->ptp_base = devm_ioremap_resource(dev, res); |
2006 | if (IS_ERR(ptr: hellcreek->ptp_base)) |
2007 | return PTR_ERR(ptr: hellcreek->ptp_base); |
2008 | |
2009 | ret = hellcreek_detect(hellcreek); |
2010 | if (ret) { |
2011 | dev_err(dev, "No (known) chip found!\n" ); |
2012 | return ret; |
2013 | } |
2014 | |
2015 | ret = hellcreek_wait_until_ready(hellcreek); |
2016 | if (ret) { |
2017 | dev_err(dev, "Switch didn't become ready!\n" ); |
2018 | return ret; |
2019 | } |
2020 | |
2021 | hellcreek_feature_detect(hellcreek); |
2022 | |
2023 | hellcreek->ds = devm_kzalloc(dev, size: sizeof(*hellcreek->ds), GFP_KERNEL); |
2024 | if (!hellcreek->ds) |
2025 | return -ENOMEM; |
2026 | |
2027 | hellcreek->ds->dev = dev; |
2028 | hellcreek->ds->priv = hellcreek; |
2029 | hellcreek->ds->ops = &hellcreek_ds_ops; |
2030 | hellcreek->ds->num_ports = hellcreek->pdata->num_ports; |
2031 | hellcreek->ds->num_tx_queues = HELLCREEK_NUM_EGRESS_QUEUES; |
2032 | |
2033 | ret = dsa_register_switch(ds: hellcreek->ds); |
2034 | if (ret) { |
2035 | dev_err_probe(dev, err: ret, fmt: "Unable to register switch\n" ); |
2036 | return ret; |
2037 | } |
2038 | |
2039 | ret = hellcreek_ptp_setup(hellcreek); |
2040 | if (ret) { |
2041 | dev_err(dev, "Failed to setup PTP!\n" ); |
2042 | goto err_ptp_setup; |
2043 | } |
2044 | |
2045 | ret = hellcreek_hwtstamp_setup(chip: hellcreek); |
2046 | if (ret) { |
2047 | dev_err(dev, "Failed to setup hardware timestamping!\n" ); |
2048 | goto err_tstamp_setup; |
2049 | } |
2050 | |
2051 | platform_set_drvdata(pdev, data: hellcreek); |
2052 | |
2053 | return 0; |
2054 | |
2055 | err_tstamp_setup: |
2056 | hellcreek_ptp_free(hellcreek); |
2057 | err_ptp_setup: |
2058 | dsa_unregister_switch(ds: hellcreek->ds); |
2059 | |
2060 | return ret; |
2061 | } |
2062 | |
2063 | static void hellcreek_remove(struct platform_device *pdev) |
2064 | { |
2065 | struct hellcreek *hellcreek = platform_get_drvdata(pdev); |
2066 | |
2067 | if (!hellcreek) |
2068 | return; |
2069 | |
2070 | hellcreek_hwtstamp_free(chip: hellcreek); |
2071 | hellcreek_ptp_free(hellcreek); |
2072 | dsa_unregister_switch(ds: hellcreek->ds); |
2073 | } |
2074 | |
2075 | static void hellcreek_shutdown(struct platform_device *pdev) |
2076 | { |
2077 | struct hellcreek *hellcreek = platform_get_drvdata(pdev); |
2078 | |
2079 | if (!hellcreek) |
2080 | return; |
2081 | |
2082 | dsa_switch_shutdown(ds: hellcreek->ds); |
2083 | |
2084 | platform_set_drvdata(pdev, NULL); |
2085 | } |
2086 | |
2087 | static const struct hellcreek_platform_data de1soc_r1_pdata = { |
2088 | .name = "r4c30" , |
2089 | .num_ports = 4, |
2090 | .is_100_mbits = 1, |
2091 | .qbv_support = 1, |
2092 | .qbv_on_cpu_port = 1, |
2093 | .qbu_support = 0, |
2094 | .module_id = 0x4c30, |
2095 | }; |
2096 | |
2097 | static const struct of_device_id hellcreek_of_match[] = { |
2098 | { |
2099 | .compatible = "hirschmann,hellcreek-de1soc-r1" , |
2100 | .data = &de1soc_r1_pdata, |
2101 | }, |
2102 | { /* sentinel */ }, |
2103 | }; |
2104 | MODULE_DEVICE_TABLE(of, hellcreek_of_match); |
2105 | |
2106 | static struct platform_driver hellcreek_driver = { |
2107 | .probe = hellcreek_probe, |
2108 | .remove_new = hellcreek_remove, |
2109 | .shutdown = hellcreek_shutdown, |
2110 | .driver = { |
2111 | .name = "hellcreek" , |
2112 | .of_match_table = hellcreek_of_match, |
2113 | }, |
2114 | }; |
2115 | module_platform_driver(hellcreek_driver); |
2116 | |
2117 | MODULE_AUTHOR("Kurt Kanzenbach <kurt@linutronix.de>" ); |
2118 | MODULE_DESCRIPTION("Hirschmann Hellcreek driver" ); |
2119 | MODULE_LICENSE("Dual MIT/GPL" ); |
2120 | |