Commit | Line | Data |
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2025cf9e | 1 | // SPDX-License-Identifier: GPL-2.0-only |
983de5f9 TR |
2 | /* |
3 | * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved. | |
983de5f9 TR |
4 | */ |
5 | ||
6 | #include <linux/clk/tegra.h> | |
7 | #include <linux/genalloc.h> | |
8 | #include <linux/mailbox_client.h> | |
9 | #include <linux/of.h> | |
10 | #include <linux/of_address.h> | |
11 | #include <linux/of_device.h> | |
12 | #include <linux/platform_device.h> | |
00cba11f | 13 | #include <linux/pm.h> |
983de5f9 | 14 | #include <linux/semaphore.h> |
e6017571 | 15 | #include <linux/sched/clock.h> |
983de5f9 TR |
16 | |
17 | #include <soc/tegra/bpmp.h> | |
18 | #include <soc/tegra/bpmp-abi.h> | |
19 | #include <soc/tegra/ivc.h> | |
20 | ||
cdfa358b TA |
21 | #include "bpmp-private.h" |
22 | ||
983de5f9 TR |
23 | #define MSG_ACK BIT(0) |
24 | #define MSG_RING BIT(1) | |
2b86c11b | 25 | #define TAG_SZ 32 |
983de5f9 TR |
26 | |
27 | static inline struct tegra_bpmp * | |
28 | mbox_client_to_bpmp(struct mbox_client *client) | |
29 | { | |
30 | return container_of(client, struct tegra_bpmp, mbox.client); | |
31 | } | |
32 | ||
cdfa358b TA |
33 | static inline const struct tegra_bpmp_ops * |
34 | channel_to_ops(struct tegra_bpmp_channel *channel) | |
35 | { | |
36 | struct tegra_bpmp *bpmp = channel->bpmp; | |
37 | ||
38 | return bpmp->soc->ops; | |
39 | } | |
40 | ||
983de5f9 TR |
41 | struct tegra_bpmp *tegra_bpmp_get(struct device *dev) |
42 | { | |
43 | struct platform_device *pdev; | |
44 | struct tegra_bpmp *bpmp; | |
45 | struct device_node *np; | |
46 | ||
47 | np = of_parse_phandle(dev->of_node, "nvidia,bpmp", 0); | |
48 | if (!np) | |
49 | return ERR_PTR(-ENOENT); | |
50 | ||
51 | pdev = of_find_device_by_node(np); | |
52 | if (!pdev) { | |
53 | bpmp = ERR_PTR(-ENODEV); | |
54 | goto put; | |
55 | } | |
56 | ||
57 | bpmp = platform_get_drvdata(pdev); | |
58 | if (!bpmp) { | |
59 | bpmp = ERR_PTR(-EPROBE_DEFER); | |
60 | put_device(&pdev->dev); | |
61 | goto put; | |
62 | } | |
63 | ||
64 | put: | |
65 | of_node_put(np); | |
66 | return bpmp; | |
67 | } | |
68 | EXPORT_SYMBOL_GPL(tegra_bpmp_get); | |
69 | ||
70 | void tegra_bpmp_put(struct tegra_bpmp *bpmp) | |
71 | { | |
72 | if (bpmp) | |
73 | put_device(bpmp->dev); | |
74 | } | |
75 | EXPORT_SYMBOL_GPL(tegra_bpmp_put); | |
76 | ||
983de5f9 TR |
77 | static int |
78 | tegra_bpmp_channel_get_thread_index(struct tegra_bpmp_channel *channel) | |
79 | { | |
80 | struct tegra_bpmp *bpmp = channel->bpmp; | |
1abb081e | 81 | unsigned int count; |
983de5f9 TR |
82 | int index; |
83 | ||
983de5f9 TR |
84 | count = bpmp->soc->channels.thread.count; |
85 | ||
1abb081e MP |
86 | index = channel - channel->bpmp->threaded_channels; |
87 | if (index < 0 || index >= count) | |
983de5f9 TR |
88 | return -EINVAL; |
89 | ||
1abb081e | 90 | return index; |
983de5f9 TR |
91 | } |
92 | ||
93 | static bool tegra_bpmp_message_valid(const struct tegra_bpmp_message *msg) | |
94 | { | |
95 | return (msg->tx.size <= MSG_DATA_MIN_SZ) && | |
96 | (msg->rx.size <= MSG_DATA_MIN_SZ) && | |
97 | (msg->tx.size == 0 || msg->tx.data) && | |
98 | (msg->rx.size == 0 || msg->rx.data); | |
99 | } | |
100 | ||
165ce6e0 | 101 | static bool tegra_bpmp_is_response_ready(struct tegra_bpmp_channel *channel) |
983de5f9 | 102 | { |
cdfa358b | 103 | const struct tegra_bpmp_ops *ops = channel_to_ops(channel); |
983de5f9 | 104 | |
cdfa358b | 105 | return ops->is_response_ready(channel); |
983de5f9 TR |
106 | } |
107 | ||
165ce6e0 TA |
108 | static bool tegra_bpmp_is_request_ready(struct tegra_bpmp_channel *channel) |
109 | { | |
cdfa358b TA |
110 | const struct tegra_bpmp_ops *ops = channel_to_ops(channel); |
111 | ||
112 | return ops->is_request_ready(channel); | |
165ce6e0 TA |
113 | } |
114 | ||
115 | static int tegra_bpmp_wait_response(struct tegra_bpmp_channel *channel) | |
983de5f9 TR |
116 | { |
117 | unsigned long timeout = channel->bpmp->soc->channels.cpu_tx.timeout; | |
118 | ktime_t end; | |
119 | ||
120 | end = ktime_add_us(ktime_get(), timeout); | |
121 | ||
122 | do { | |
165ce6e0 | 123 | if (tegra_bpmp_is_response_ready(channel)) |
983de5f9 TR |
124 | return 0; |
125 | } while (ktime_before(ktime_get(), end)); | |
126 | ||
127 | return -ETIMEDOUT; | |
128 | } | |
129 | ||
165ce6e0 TA |
130 | static int tegra_bpmp_ack_response(struct tegra_bpmp_channel *channel) |
131 | { | |
cdfa358b TA |
132 | const struct tegra_bpmp_ops *ops = channel_to_ops(channel); |
133 | ||
134 | return ops->ack_response(channel); | |
165ce6e0 TA |
135 | } |
136 | ||
137 | static int tegra_bpmp_ack_request(struct tegra_bpmp_channel *channel) | |
138 | { | |
cdfa358b TA |
139 | const struct tegra_bpmp_ops *ops = channel_to_ops(channel); |
140 | ||
141 | return ops->ack_request(channel); | |
165ce6e0 TA |
142 | } |
143 | ||
144 | static bool | |
145 | tegra_bpmp_is_request_channel_free(struct tegra_bpmp_channel *channel) | |
983de5f9 | 146 | { |
cdfa358b | 147 | const struct tegra_bpmp_ops *ops = channel_to_ops(channel); |
983de5f9 | 148 | |
cdfa358b | 149 | return ops->is_request_channel_free(channel); |
983de5f9 TR |
150 | } |
151 | ||
165ce6e0 TA |
152 | static bool |
153 | tegra_bpmp_is_response_channel_free(struct tegra_bpmp_channel *channel) | |
154 | { | |
cdfa358b TA |
155 | const struct tegra_bpmp_ops *ops = channel_to_ops(channel); |
156 | ||
157 | return ops->is_response_channel_free(channel); | |
165ce6e0 TA |
158 | } |
159 | ||
160 | static int | |
161 | tegra_bpmp_wait_request_channel_free(struct tegra_bpmp_channel *channel) | |
983de5f9 TR |
162 | { |
163 | unsigned long timeout = channel->bpmp->soc->channels.cpu_tx.timeout; | |
164 | ktime_t start, now; | |
165 | ||
166 | start = ns_to_ktime(local_clock()); | |
167 | ||
168 | do { | |
165ce6e0 | 169 | if (tegra_bpmp_is_request_channel_free(channel)) |
983de5f9 TR |
170 | return 0; |
171 | ||
172 | now = ns_to_ktime(local_clock()); | |
173 | } while (ktime_us_delta(now, start) < timeout); | |
174 | ||
175 | return -ETIMEDOUT; | |
176 | } | |
177 | ||
165ce6e0 TA |
178 | static int tegra_bpmp_post_request(struct tegra_bpmp_channel *channel) |
179 | { | |
cdfa358b TA |
180 | const struct tegra_bpmp_ops *ops = channel_to_ops(channel); |
181 | ||
182 | return ops->post_request(channel); | |
165ce6e0 TA |
183 | } |
184 | ||
185 | static int tegra_bpmp_post_response(struct tegra_bpmp_channel *channel) | |
186 | { | |
cdfa358b TA |
187 | const struct tegra_bpmp_ops *ops = channel_to_ops(channel); |
188 | ||
189 | return ops->post_response(channel); | |
165ce6e0 TA |
190 | } |
191 | ||
192 | static int tegra_bpmp_ring_doorbell(struct tegra_bpmp *bpmp) | |
193 | { | |
cdfa358b | 194 | return bpmp->soc->ops->ring_doorbell(bpmp); |
165ce6e0 TA |
195 | } |
196 | ||
983de5f9 | 197 | static ssize_t __tegra_bpmp_channel_read(struct tegra_bpmp_channel *channel, |
370d010f | 198 | void *data, size_t size, int *ret) |
983de5f9 | 199 | { |
370d010f TA |
200 | int err; |
201 | ||
983de5f9 TR |
202 | if (data && size > 0) |
203 | memcpy(data, channel->ib->data, size); | |
204 | ||
165ce6e0 | 205 | err = tegra_bpmp_ack_response(channel); |
370d010f TA |
206 | if (err < 0) |
207 | return err; | |
208 | ||
209 | *ret = channel->ib->code; | |
210 | ||
211 | return 0; | |
983de5f9 TR |
212 | } |
213 | ||
214 | static ssize_t tegra_bpmp_channel_read(struct tegra_bpmp_channel *channel, | |
370d010f | 215 | void *data, size_t size, int *ret) |
983de5f9 TR |
216 | { |
217 | struct tegra_bpmp *bpmp = channel->bpmp; | |
218 | unsigned long flags; | |
219 | ssize_t err; | |
220 | int index; | |
221 | ||
222 | index = tegra_bpmp_channel_get_thread_index(channel); | |
cd307124 DC |
223 | if (index < 0) { |
224 | err = index; | |
225 | goto unlock; | |
226 | } | |
983de5f9 TR |
227 | |
228 | spin_lock_irqsave(&bpmp->lock, flags); | |
370d010f | 229 | err = __tegra_bpmp_channel_read(channel, data, size, ret); |
983de5f9 TR |
230 | clear_bit(index, bpmp->threaded.allocated); |
231 | spin_unlock_irqrestore(&bpmp->lock, flags); | |
232 | ||
cd307124 | 233 | unlock: |
983de5f9 TR |
234 | up(&bpmp->threaded.lock); |
235 | ||
236 | return err; | |
237 | } | |
238 | ||
239 | static ssize_t __tegra_bpmp_channel_write(struct tegra_bpmp_channel *channel, | |
240 | unsigned int mrq, unsigned long flags, | |
241 | const void *data, size_t size) | |
242 | { | |
243 | channel->ob->code = mrq; | |
244 | channel->ob->flags = flags; | |
245 | ||
246 | if (data && size > 0) | |
247 | memcpy(channel->ob->data, data, size); | |
248 | ||
165ce6e0 | 249 | return tegra_bpmp_post_request(channel); |
983de5f9 TR |
250 | } |
251 | ||
252 | static struct tegra_bpmp_channel * | |
253 | tegra_bpmp_write_threaded(struct tegra_bpmp *bpmp, unsigned int mrq, | |
254 | const void *data, size_t size) | |
255 | { | |
256 | unsigned long timeout = bpmp->soc->channels.thread.timeout; | |
257 | unsigned int count = bpmp->soc->channels.thread.count; | |
258 | struct tegra_bpmp_channel *channel; | |
259 | unsigned long flags; | |
260 | unsigned int index; | |
261 | int err; | |
262 | ||
263 | err = down_timeout(&bpmp->threaded.lock, usecs_to_jiffies(timeout)); | |
264 | if (err < 0) | |
265 | return ERR_PTR(err); | |
266 | ||
267 | spin_lock_irqsave(&bpmp->lock, flags); | |
268 | ||
269 | index = find_first_zero_bit(bpmp->threaded.allocated, count); | |
270 | if (index == count) { | |
cd307124 | 271 | err = -EBUSY; |
983de5f9 TR |
272 | goto unlock; |
273 | } | |
274 | ||
1abb081e | 275 | channel = &bpmp->threaded_channels[index]; |
983de5f9 | 276 | |
165ce6e0 | 277 | if (!tegra_bpmp_is_request_channel_free(channel)) { |
cd307124 | 278 | err = -EBUSY; |
983de5f9 TR |
279 | goto unlock; |
280 | } | |
281 | ||
282 | set_bit(index, bpmp->threaded.allocated); | |
283 | ||
284 | err = __tegra_bpmp_channel_write(channel, mrq, MSG_ACK | MSG_RING, | |
285 | data, size); | |
cd307124 DC |
286 | if (err < 0) |
287 | goto clear_allocated; | |
983de5f9 TR |
288 | |
289 | set_bit(index, bpmp->threaded.busy); | |
290 | ||
983de5f9 TR |
291 | spin_unlock_irqrestore(&bpmp->lock, flags); |
292 | return channel; | |
cd307124 DC |
293 | |
294 | clear_allocated: | |
295 | clear_bit(index, bpmp->threaded.allocated); | |
296 | unlock: | |
297 | spin_unlock_irqrestore(&bpmp->lock, flags); | |
298 | up(&bpmp->threaded.lock); | |
299 | ||
300 | return ERR_PTR(err); | |
983de5f9 TR |
301 | } |
302 | ||
303 | static ssize_t tegra_bpmp_channel_write(struct tegra_bpmp_channel *channel, | |
304 | unsigned int mrq, unsigned long flags, | |
305 | const void *data, size_t size) | |
306 | { | |
307 | int err; | |
308 | ||
165ce6e0 | 309 | err = tegra_bpmp_wait_request_channel_free(channel); |
983de5f9 TR |
310 | if (err < 0) |
311 | return err; | |
312 | ||
313 | return __tegra_bpmp_channel_write(channel, mrq, flags, data, size); | |
314 | } | |
315 | ||
316 | int tegra_bpmp_transfer_atomic(struct tegra_bpmp *bpmp, | |
317 | struct tegra_bpmp_message *msg) | |
318 | { | |
319 | struct tegra_bpmp_channel *channel; | |
320 | int err; | |
321 | ||
322 | if (WARN_ON(!irqs_disabled())) | |
323 | return -EPERM; | |
324 | ||
325 | if (!tegra_bpmp_message_valid(msg)) | |
326 | return -EINVAL; | |
327 | ||
1abb081e MP |
328 | channel = bpmp->tx_channel; |
329 | ||
330 | spin_lock(&bpmp->atomic_tx_lock); | |
983de5f9 TR |
331 | |
332 | err = tegra_bpmp_channel_write(channel, msg->mrq, MSG_ACK, | |
333 | msg->tx.data, msg->tx.size); | |
1abb081e MP |
334 | if (err < 0) { |
335 | spin_unlock(&bpmp->atomic_tx_lock); | |
983de5f9 | 336 | return err; |
1abb081e MP |
337 | } |
338 | ||
339 | spin_unlock(&bpmp->atomic_tx_lock); | |
983de5f9 | 340 | |
165ce6e0 | 341 | err = tegra_bpmp_ring_doorbell(bpmp); |
983de5f9 TR |
342 | if (err < 0) |
343 | return err; | |
344 | ||
165ce6e0 | 345 | err = tegra_bpmp_wait_response(channel); |
983de5f9 TR |
346 | if (err < 0) |
347 | return err; | |
348 | ||
370d010f TA |
349 | return __tegra_bpmp_channel_read(channel, msg->rx.data, msg->rx.size, |
350 | &msg->rx.ret); | |
983de5f9 TR |
351 | } |
352 | EXPORT_SYMBOL_GPL(tegra_bpmp_transfer_atomic); | |
353 | ||
354 | int tegra_bpmp_transfer(struct tegra_bpmp *bpmp, | |
355 | struct tegra_bpmp_message *msg) | |
356 | { | |
357 | struct tegra_bpmp_channel *channel; | |
358 | unsigned long timeout; | |
359 | int err; | |
360 | ||
361 | if (WARN_ON(irqs_disabled())) | |
362 | return -EPERM; | |
363 | ||
364 | if (!tegra_bpmp_message_valid(msg)) | |
365 | return -EINVAL; | |
366 | ||
367 | channel = tegra_bpmp_write_threaded(bpmp, msg->mrq, msg->tx.data, | |
368 | msg->tx.size); | |
369 | if (IS_ERR(channel)) | |
370 | return PTR_ERR(channel); | |
371 | ||
165ce6e0 | 372 | err = tegra_bpmp_ring_doorbell(bpmp); |
983de5f9 TR |
373 | if (err < 0) |
374 | return err; | |
375 | ||
983de5f9 TR |
376 | timeout = usecs_to_jiffies(bpmp->soc->channels.thread.timeout); |
377 | ||
378 | err = wait_for_completion_timeout(&channel->completion, timeout); | |
379 | if (err == 0) | |
380 | return -ETIMEDOUT; | |
381 | ||
370d010f TA |
382 | return tegra_bpmp_channel_read(channel, msg->rx.data, msg->rx.size, |
383 | &msg->rx.ret); | |
983de5f9 TR |
384 | } |
385 | EXPORT_SYMBOL_GPL(tegra_bpmp_transfer); | |
386 | ||
387 | static struct tegra_bpmp_mrq *tegra_bpmp_find_mrq(struct tegra_bpmp *bpmp, | |
388 | unsigned int mrq) | |
389 | { | |
390 | struct tegra_bpmp_mrq *entry; | |
391 | ||
392 | list_for_each_entry(entry, &bpmp->mrqs, list) | |
393 | if (entry->mrq == mrq) | |
394 | return entry; | |
395 | ||
396 | return NULL; | |
397 | } | |
398 | ||
2e1e09ed MP |
399 | void tegra_bpmp_mrq_return(struct tegra_bpmp_channel *channel, int code, |
400 | const void *data, size_t size) | |
983de5f9 TR |
401 | { |
402 | unsigned long flags = channel->ib->flags; | |
403 | struct tegra_bpmp *bpmp = channel->bpmp; | |
983de5f9 TR |
404 | int err; |
405 | ||
406 | if (WARN_ON(size > MSG_DATA_MIN_SZ)) | |
407 | return; | |
408 | ||
165ce6e0 | 409 | err = tegra_bpmp_ack_request(channel); |
983de5f9 TR |
410 | if (WARN_ON(err < 0)) |
411 | return; | |
412 | ||
413 | if ((flags & MSG_ACK) == 0) | |
414 | return; | |
415 | ||
165ce6e0 | 416 | if (WARN_ON(!tegra_bpmp_is_response_channel_free(channel))) |
983de5f9 TR |
417 | return; |
418 | ||
165ce6e0 | 419 | channel->ob->code = code; |
983de5f9 TR |
420 | |
421 | if (data && size > 0) | |
165ce6e0 | 422 | memcpy(channel->ob->data, data, size); |
983de5f9 | 423 | |
165ce6e0 | 424 | err = tegra_bpmp_post_response(channel); |
983de5f9 TR |
425 | if (WARN_ON(err < 0)) |
426 | return; | |
427 | ||
428 | if (flags & MSG_RING) { | |
165ce6e0 | 429 | err = tegra_bpmp_ring_doorbell(bpmp); |
983de5f9 TR |
430 | if (WARN_ON(err < 0)) |
431 | return; | |
983de5f9 TR |
432 | } |
433 | } | |
2e1e09ed | 434 | EXPORT_SYMBOL_GPL(tegra_bpmp_mrq_return); |
983de5f9 TR |
435 | |
436 | static void tegra_bpmp_handle_mrq(struct tegra_bpmp *bpmp, | |
437 | unsigned int mrq, | |
438 | struct tegra_bpmp_channel *channel) | |
439 | { | |
440 | struct tegra_bpmp_mrq *entry; | |
441 | u32 zero = 0; | |
442 | ||
443 | spin_lock(&bpmp->lock); | |
444 | ||
445 | entry = tegra_bpmp_find_mrq(bpmp, mrq); | |
446 | if (!entry) { | |
447 | spin_unlock(&bpmp->lock); | |
448 | tegra_bpmp_mrq_return(channel, -EINVAL, &zero, sizeof(zero)); | |
449 | return; | |
450 | } | |
451 | ||
452 | entry->handler(mrq, channel, entry->data); | |
453 | ||
454 | spin_unlock(&bpmp->lock); | |
455 | } | |
456 | ||
457 | int tegra_bpmp_request_mrq(struct tegra_bpmp *bpmp, unsigned int mrq, | |
458 | tegra_bpmp_mrq_handler_t handler, void *data) | |
459 | { | |
460 | struct tegra_bpmp_mrq *entry; | |
461 | unsigned long flags; | |
462 | ||
463 | if (!handler) | |
464 | return -EINVAL; | |
465 | ||
466 | entry = devm_kzalloc(bpmp->dev, sizeof(*entry), GFP_KERNEL); | |
467 | if (!entry) | |
468 | return -ENOMEM; | |
469 | ||
470 | spin_lock_irqsave(&bpmp->lock, flags); | |
471 | ||
472 | entry->mrq = mrq; | |
473 | entry->handler = handler; | |
474 | entry->data = data; | |
475 | list_add(&entry->list, &bpmp->mrqs); | |
476 | ||
477 | spin_unlock_irqrestore(&bpmp->lock, flags); | |
478 | ||
479 | return 0; | |
480 | } | |
481 | EXPORT_SYMBOL_GPL(tegra_bpmp_request_mrq); | |
482 | ||
483 | void tegra_bpmp_free_mrq(struct tegra_bpmp *bpmp, unsigned int mrq, void *data) | |
484 | { | |
485 | struct tegra_bpmp_mrq *entry; | |
486 | unsigned long flags; | |
487 | ||
488 | spin_lock_irqsave(&bpmp->lock, flags); | |
489 | ||
490 | entry = tegra_bpmp_find_mrq(bpmp, mrq); | |
491 | if (!entry) | |
492 | goto unlock; | |
493 | ||
494 | list_del(&entry->list); | |
495 | devm_kfree(bpmp->dev, entry); | |
496 | ||
497 | unlock: | |
498 | spin_unlock_irqrestore(&bpmp->lock, flags); | |
499 | } | |
500 | EXPORT_SYMBOL_GPL(tegra_bpmp_free_mrq); | |
501 | ||
d78b5bde TA |
502 | bool tegra_bpmp_mrq_is_supported(struct tegra_bpmp *bpmp, unsigned int mrq) |
503 | { | |
504 | struct mrq_query_abi_request req = { .mrq = cpu_to_le32(mrq) }; | |
505 | struct mrq_query_abi_response resp; | |
506 | struct tegra_bpmp_message msg = { | |
507 | .mrq = MRQ_QUERY_ABI, | |
508 | .tx = { | |
509 | .data = &req, | |
510 | .size = sizeof(req), | |
511 | }, | |
512 | .rx = { | |
513 | .data = &resp, | |
514 | .size = sizeof(resp), | |
515 | }, | |
516 | }; | |
517 | int ret; | |
518 | ||
519 | ret = tegra_bpmp_transfer(bpmp, &msg); | |
520 | if (ret || msg.rx.ret) | |
521 | return false; | |
522 | ||
523 | return resp.status == 0; | |
524 | } | |
525 | EXPORT_SYMBOL_GPL(tegra_bpmp_mrq_is_supported); | |
526 | ||
983de5f9 TR |
527 | static void tegra_bpmp_mrq_handle_ping(unsigned int mrq, |
528 | struct tegra_bpmp_channel *channel, | |
529 | void *data) | |
530 | { | |
531 | struct mrq_ping_request *request; | |
532 | struct mrq_ping_response response; | |
533 | ||
534 | request = (struct mrq_ping_request *)channel->ib->data; | |
535 | ||
536 | memset(&response, 0, sizeof(response)); | |
537 | response.reply = request->challenge << 1; | |
538 | ||
539 | tegra_bpmp_mrq_return(channel, 0, &response, sizeof(response)); | |
540 | } | |
541 | ||
542 | static int tegra_bpmp_ping(struct tegra_bpmp *bpmp) | |
543 | { | |
544 | struct mrq_ping_response response; | |
545 | struct mrq_ping_request request; | |
546 | struct tegra_bpmp_message msg; | |
547 | unsigned long flags; | |
548 | ktime_t start, end; | |
549 | int err; | |
550 | ||
551 | memset(&request, 0, sizeof(request)); | |
552 | request.challenge = 1; | |
553 | ||
554 | memset(&response, 0, sizeof(response)); | |
555 | ||
556 | memset(&msg, 0, sizeof(msg)); | |
557 | msg.mrq = MRQ_PING; | |
558 | msg.tx.data = &request; | |
559 | msg.tx.size = sizeof(request); | |
560 | msg.rx.data = &response; | |
561 | msg.rx.size = sizeof(response); | |
562 | ||
563 | local_irq_save(flags); | |
564 | start = ktime_get(); | |
565 | err = tegra_bpmp_transfer_atomic(bpmp, &msg); | |
566 | end = ktime_get(); | |
567 | local_irq_restore(flags); | |
568 | ||
569 | if (!err) | |
570 | dev_dbg(bpmp->dev, | |
571 | "ping ok: challenge: %u, response: %u, time: %lld\n", | |
572 | request.challenge, response.reply, | |
573 | ktime_to_us(ktime_sub(end, start))); | |
574 | ||
575 | return err; | |
576 | } | |
577 | ||
af51c25f TA |
578 | /* deprecated version of tag query */ |
579 | static int tegra_bpmp_get_firmware_tag_old(struct tegra_bpmp *bpmp, char *tag, | |
580 | size_t size) | |
983de5f9 TR |
581 | { |
582 | struct mrq_query_tag_request request; | |
583 | struct tegra_bpmp_message msg; | |
584 | unsigned long flags; | |
585 | dma_addr_t phys; | |
586 | void *virt; | |
587 | int err; | |
588 | ||
2b86c11b TA |
589 | if (size != TAG_SZ) |
590 | return -EINVAL; | |
591 | ||
592 | virt = dma_alloc_coherent(bpmp->dev, TAG_SZ, &phys, | |
983de5f9 TR |
593 | GFP_KERNEL | GFP_DMA32); |
594 | if (!virt) | |
595 | return -ENOMEM; | |
596 | ||
597 | memset(&request, 0, sizeof(request)); | |
598 | request.addr = phys; | |
599 | ||
600 | memset(&msg, 0, sizeof(msg)); | |
601 | msg.mrq = MRQ_QUERY_TAG; | |
602 | msg.tx.data = &request; | |
603 | msg.tx.size = sizeof(request); | |
604 | ||
605 | local_irq_save(flags); | |
606 | err = tegra_bpmp_transfer_atomic(bpmp, &msg); | |
607 | local_irq_restore(flags); | |
608 | ||
609 | if (err == 0) | |
2b86c11b | 610 | memcpy(tag, virt, TAG_SZ); |
983de5f9 | 611 | |
2b86c11b | 612 | dma_free_coherent(bpmp->dev, TAG_SZ, virt, phys); |
983de5f9 TR |
613 | |
614 | return err; | |
615 | } | |
616 | ||
af51c25f TA |
617 | static int tegra_bpmp_get_firmware_tag(struct tegra_bpmp *bpmp, char *tag, |
618 | size_t size) | |
619 | { | |
620 | if (tegra_bpmp_mrq_is_supported(bpmp, MRQ_QUERY_FW_TAG)) { | |
621 | struct mrq_query_fw_tag_response resp; | |
622 | struct tegra_bpmp_message msg = { | |
623 | .mrq = MRQ_QUERY_FW_TAG, | |
624 | .rx = { | |
625 | .data = &resp, | |
626 | .size = sizeof(resp), | |
627 | }, | |
628 | }; | |
629 | int err; | |
630 | ||
631 | if (size != sizeof(resp.tag)) | |
632 | return -EINVAL; | |
633 | ||
634 | err = tegra_bpmp_transfer(bpmp, &msg); | |
635 | ||
636 | if (err) | |
637 | return err; | |
638 | if (msg.rx.ret < 0) | |
639 | return -EINVAL; | |
640 | ||
641 | memcpy(tag, resp.tag, sizeof(resp.tag)); | |
642 | return 0; | |
643 | } | |
644 | ||
645 | return tegra_bpmp_get_firmware_tag_old(bpmp, tag, size); | |
646 | } | |
647 | ||
983de5f9 TR |
648 | static void tegra_bpmp_channel_signal(struct tegra_bpmp_channel *channel) |
649 | { | |
650 | unsigned long flags = channel->ob->flags; | |
651 | ||
652 | if ((flags & MSG_RING) == 0) | |
653 | return; | |
654 | ||
655 | complete(&channel->completion); | |
656 | } | |
657 | ||
cdfa358b | 658 | void tegra_bpmp_handle_rx(struct tegra_bpmp *bpmp) |
983de5f9 | 659 | { |
983de5f9 TR |
660 | struct tegra_bpmp_channel *channel; |
661 | unsigned int i, count; | |
662 | unsigned long *busy; | |
663 | ||
1abb081e | 664 | channel = bpmp->rx_channel; |
983de5f9 TR |
665 | count = bpmp->soc->channels.thread.count; |
666 | busy = bpmp->threaded.busy; | |
667 | ||
165ce6e0 | 668 | if (tegra_bpmp_is_request_ready(channel)) |
983de5f9 TR |
669 | tegra_bpmp_handle_mrq(bpmp, channel->ib->code, channel); |
670 | ||
671 | spin_lock(&bpmp->lock); | |
672 | ||
673 | for_each_set_bit(i, busy, count) { | |
674 | struct tegra_bpmp_channel *channel; | |
675 | ||
1abb081e | 676 | channel = &bpmp->threaded_channels[i]; |
983de5f9 | 677 | |
165ce6e0 | 678 | if (tegra_bpmp_is_response_ready(channel)) { |
983de5f9 TR |
679 | tegra_bpmp_channel_signal(channel); |
680 | clear_bit(i, busy); | |
681 | } | |
682 | } | |
683 | ||
684 | spin_unlock(&bpmp->lock); | |
685 | } | |
686 | ||
983de5f9 TR |
687 | static int tegra_bpmp_probe(struct platform_device *pdev) |
688 | { | |
983de5f9 | 689 | struct tegra_bpmp *bpmp; |
2b86c11b | 690 | char tag[TAG_SZ]; |
983de5f9 TR |
691 | size_t size; |
692 | int err; | |
693 | ||
694 | bpmp = devm_kzalloc(&pdev->dev, sizeof(*bpmp), GFP_KERNEL); | |
695 | if (!bpmp) | |
696 | return -ENOMEM; | |
697 | ||
698 | bpmp->soc = of_device_get_match_data(&pdev->dev); | |
699 | bpmp->dev = &pdev->dev; | |
700 | ||
983de5f9 TR |
701 | INIT_LIST_HEAD(&bpmp->mrqs); |
702 | spin_lock_init(&bpmp->lock); | |
703 | ||
704 | bpmp->threaded.count = bpmp->soc->channels.thread.count; | |
705 | sema_init(&bpmp->threaded.lock, bpmp->threaded.count); | |
706 | ||
707 | size = BITS_TO_LONGS(bpmp->threaded.count) * sizeof(long); | |
708 | ||
709 | bpmp->threaded.allocated = devm_kzalloc(&pdev->dev, size, GFP_KERNEL); | |
cdfa358b TA |
710 | if (!bpmp->threaded.allocated) |
711 | return -ENOMEM; | |
983de5f9 TR |
712 | |
713 | bpmp->threaded.busy = devm_kzalloc(&pdev->dev, size, GFP_KERNEL); | |
cdfa358b TA |
714 | if (!bpmp->threaded.busy) |
715 | return -ENOMEM; | |
983de5f9 | 716 | |
1abb081e MP |
717 | spin_lock_init(&bpmp->atomic_tx_lock); |
718 | bpmp->tx_channel = devm_kzalloc(&pdev->dev, sizeof(*bpmp->tx_channel), | |
719 | GFP_KERNEL); | |
cdfa358b TA |
720 | if (!bpmp->tx_channel) |
721 | return -ENOMEM; | |
983de5f9 | 722 | |
1abb081e MP |
723 | bpmp->rx_channel = devm_kzalloc(&pdev->dev, sizeof(*bpmp->rx_channel), |
724 | GFP_KERNEL); | |
cdfa358b TA |
725 | if (!bpmp->rx_channel) |
726 | return -ENOMEM; | |
983de5f9 | 727 | |
1abb081e MP |
728 | bpmp->threaded_channels = devm_kcalloc(&pdev->dev, bpmp->threaded.count, |
729 | sizeof(*bpmp->threaded_channels), | |
730 | GFP_KERNEL); | |
cdfa358b TA |
731 | if (!bpmp->threaded_channels) |
732 | return -ENOMEM; | |
1abb081e | 733 | |
cdfa358b | 734 | err = bpmp->soc->ops->init(bpmp); |
1abb081e | 735 | if (err < 0) |
cdfa358b | 736 | return err; |
983de5f9 TR |
737 | |
738 | err = tegra_bpmp_request_mrq(bpmp, MRQ_PING, | |
739 | tegra_bpmp_mrq_handle_ping, bpmp); | |
740 | if (err < 0) | |
cdfa358b | 741 | goto deinit; |
983de5f9 TR |
742 | |
743 | err = tegra_bpmp_ping(bpmp); | |
744 | if (err < 0) { | |
745 | dev_err(&pdev->dev, "failed to ping BPMP: %d\n", err); | |
746 | goto free_mrq; | |
747 | } | |
748 | ||
2b86c11b | 749 | err = tegra_bpmp_get_firmware_tag(bpmp, tag, sizeof(tag)); |
983de5f9 TR |
750 | if (err < 0) { |
751 | dev_err(&pdev->dev, "failed to get firmware tag: %d\n", err); | |
752 | goto free_mrq; | |
753 | } | |
754 | ||
2b86c11b | 755 | dev_info(&pdev->dev, "firmware: %.*s\n", (int)sizeof(tag), tag); |
983de5f9 | 756 | |
122954ed TA |
757 | platform_set_drvdata(pdev, bpmp); |
758 | ||
983de5f9 TR |
759 | err = of_platform_default_populate(pdev->dev.of_node, NULL, &pdev->dev); |
760 | if (err < 0) | |
761 | goto free_mrq; | |
762 | ||
139251fc TA |
763 | if (of_find_property(pdev->dev.of_node, "#clock-cells", NULL)) { |
764 | err = tegra_bpmp_init_clocks(bpmp); | |
765 | if (err < 0) | |
766 | goto free_mrq; | |
767 | } | |
983de5f9 | 768 | |
139251fc TA |
769 | if (of_find_property(pdev->dev.of_node, "#reset-cells", NULL)) { |
770 | err = tegra_bpmp_init_resets(bpmp); | |
771 | if (err < 0) | |
772 | goto free_mrq; | |
773 | } | |
983de5f9 | 774 | |
139251fc TA |
775 | if (of_find_property(pdev->dev.of_node, "#power-domain-cells", NULL)) { |
776 | err = tegra_bpmp_init_powergates(bpmp); | |
777 | if (err < 0) | |
778 | goto free_mrq; | |
779 | } | |
e7149a7a | 780 | |
f2381f65 TA |
781 | err = tegra_bpmp_init_debugfs(bpmp); |
782 | if (err < 0) | |
783 | dev_err(&pdev->dev, "debugfs initialization failed: %d\n", err); | |
784 | ||
983de5f9 TR |
785 | return 0; |
786 | ||
787 | free_mrq: | |
788 | tegra_bpmp_free_mrq(bpmp, MRQ_PING, bpmp); | |
cdfa358b TA |
789 | deinit: |
790 | if (bpmp->soc->ops->deinit) | |
791 | bpmp->soc->ops->deinit(bpmp); | |
1abb081e | 792 | |
983de5f9 TR |
793 | return err; |
794 | } | |
795 | ||
00cba11f TR |
796 | static int __maybe_unused tegra_bpmp_resume(struct device *dev) |
797 | { | |
798 | struct tegra_bpmp *bpmp = dev_get_drvdata(dev); | |
00cba11f | 799 | |
cdfa358b TA |
800 | if (bpmp->soc->ops->resume) |
801 | return bpmp->soc->ops->resume(bpmp); | |
802 | else | |
803 | return 0; | |
00cba11f TR |
804 | } |
805 | ||
806 | static SIMPLE_DEV_PM_OPS(tegra_bpmp_pm_ops, NULL, tegra_bpmp_resume); | |
807 | ||
fe45ab55 TR |
808 | #if IS_ENABLED(CONFIG_ARCH_TEGRA_186_SOC) || \ |
809 | IS_ENABLED(CONFIG_ARCH_TEGRA_194_SOC) | |
983de5f9 TR |
810 | static const struct tegra_bpmp_soc tegra186_soc = { |
811 | .channels = { | |
812 | .cpu_tx = { | |
1abb081e | 813 | .offset = 3, |
983de5f9 TR |
814 | .timeout = 60 * USEC_PER_SEC, |
815 | }, | |
816 | .thread = { | |
1abb081e MP |
817 | .offset = 0, |
818 | .count = 3, | |
983de5f9 TR |
819 | .timeout = 600 * USEC_PER_SEC, |
820 | }, | |
821 | .cpu_rx = { | |
822 | .offset = 13, | |
983de5f9 TR |
823 | .timeout = 0, |
824 | }, | |
825 | }, | |
cdfa358b | 826 | .ops = &tegra186_bpmp_ops, |
983de5f9 TR |
827 | .num_resets = 193, |
828 | }; | |
79d031fc | 829 | #endif |
983de5f9 | 830 | |
79d031fc | 831 | #if IS_ENABLED(CONFIG_ARCH_TEGRA_210_SOC) |
139251fc TA |
832 | static const struct tegra_bpmp_soc tegra210_soc = { |
833 | .channels = { | |
834 | .cpu_tx = { | |
835 | .offset = 0, | |
836 | .count = 1, | |
837 | .timeout = 60 * USEC_PER_SEC, | |
838 | }, | |
839 | .thread = { | |
840 | .offset = 4, | |
841 | .count = 1, | |
842 | .timeout = 600 * USEC_PER_SEC, | |
843 | }, | |
844 | .cpu_rx = { | |
845 | .offset = 8, | |
846 | .count = 1, | |
847 | .timeout = 0, | |
848 | }, | |
849 | }, | |
850 | .ops = &tegra210_bpmp_ops, | |
851 | }; | |
79d031fc | 852 | #endif |
139251fc | 853 | |
983de5f9 | 854 | static const struct of_device_id tegra_bpmp_match[] = { |
fe45ab55 TR |
855 | #if IS_ENABLED(CONFIG_ARCH_TEGRA_186_SOC) || \ |
856 | IS_ENABLED(CONFIG_ARCH_TEGRA_194_SOC) | |
983de5f9 | 857 | { .compatible = "nvidia,tegra186-bpmp", .data = &tegra186_soc }, |
79d031fc TR |
858 | #endif |
859 | #if IS_ENABLED(CONFIG_ARCH_TEGRA_210_SOC) | |
139251fc | 860 | { .compatible = "nvidia,tegra210-bpmp", .data = &tegra210_soc }, |
79d031fc | 861 | #endif |
983de5f9 TR |
862 | { } |
863 | }; | |
864 | ||
865 | static struct platform_driver tegra_bpmp_driver = { | |
866 | .driver = { | |
867 | .name = "tegra-bpmp", | |
868 | .of_match_table = tegra_bpmp_match, | |
00cba11f | 869 | .pm = &tegra_bpmp_pm_ops, |
983de5f9 TR |
870 | }, |
871 | .probe = tegra_bpmp_probe, | |
872 | }; | |
873 | ||
874 | static int __init tegra_bpmp_init(void) | |
875 | { | |
876 | return platform_driver_register(&tegra_bpmp_driver); | |
877 | } | |
878 | core_initcall(tegra_bpmp_init); |