Commit | Line | Data |
---|---|---|
75471687 TB |
1 | /* |
2 | * Tegra host1x Syncpoints | |
3 | * | |
d4b57818 | 4 | * Copyright (c) 2010-2015, NVIDIA Corporation. |
75471687 TB |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms and conditions of the GNU General Public License, | |
8 | * version 2, as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope it will be useful, but WITHOUT | |
11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
13 | * more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/device.h> | |
21 | #include <linux/slab.h> | |
22 | ||
23 | #include <trace/events/host1x.h> | |
24 | ||
25 | #include "syncpt.h" | |
26 | #include "dev.h" | |
7ede0b0b | 27 | #include "intr.h" |
6236451d | 28 | #include "debug.h" |
7ede0b0b TB |
29 | |
30 | #define SYNCPT_CHECK_PERIOD (2 * HZ) | |
31 | #define MAX_STUCK_CHECK_COUNT 15 | |
75471687 | 32 | |
f5a954fe AM |
33 | static struct host1x_syncpt_base * |
34 | host1x_syncpt_base_request(struct host1x *host) | |
35 | { | |
36 | struct host1x_syncpt_base *bases = host->bases; | |
37 | unsigned int i; | |
38 | ||
39 | for (i = 0; i < host->info->nb_bases; i++) | |
40 | if (!bases[i].requested) | |
41 | break; | |
42 | ||
43 | if (i >= host->info->nb_bases) | |
44 | return NULL; | |
45 | ||
46 | bases[i].requested = true; | |
47 | return &bases[i]; | |
48 | } | |
49 | ||
50 | static void host1x_syncpt_base_free(struct host1x_syncpt_base *base) | |
51 | { | |
52 | if (base) | |
53 | base->requested = false; | |
54 | } | |
55 | ||
8736fe81 | 56 | static struct host1x_syncpt *host1x_syncpt_alloc(struct host1x *host, |
617dd7cc | 57 | struct host1x_client *client, |
8736fe81 | 58 | unsigned long flags) |
75471687 | 59 | { |
75471687 | 60 | struct host1x_syncpt *sp = host->syncpt; |
d4ad3ad9 | 61 | unsigned int i; |
75471687 TB |
62 | char *name; |
63 | ||
d4b57818 AM |
64 | mutex_lock(&host->syncpt_mutex); |
65 | ||
75471687 TB |
66 | for (i = 0; i < host->info->nb_pts && sp->name; i++, sp++) |
67 | ; | |
edeabfcb AM |
68 | |
69 | if (i >= host->info->nb_pts) | |
d4b57818 | 70 | goto unlock; |
75471687 | 71 | |
f5a954fe AM |
72 | if (flags & HOST1X_SYNCPT_HAS_BASE) { |
73 | sp->base = host1x_syncpt_base_request(host); | |
74 | if (!sp->base) | |
d4b57818 | 75 | goto unlock; |
f5a954fe AM |
76 | } |
77 | ||
5c0d8d38 | 78 | name = kasprintf(GFP_KERNEL, "%02u-%s", sp->id, |
617dd7cc | 79 | client ? dev_name(client->dev) : NULL); |
75471687 | 80 | if (!name) |
d4b57818 | 81 | goto free_base; |
75471687 | 82 | |
617dd7cc | 83 | sp->client = client; |
75471687 | 84 | sp->name = name; |
8736fe81 AM |
85 | |
86 | if (flags & HOST1X_SYNCPT_CLIENT_MANAGED) | |
87 | sp->client_managed = true; | |
88 | else | |
89 | sp->client_managed = false; | |
75471687 | 90 | |
d4b57818 | 91 | mutex_unlock(&host->syncpt_mutex); |
75471687 | 92 | return sp; |
d4b57818 AM |
93 | |
94 | free_base: | |
95 | host1x_syncpt_base_free(sp->base); | |
96 | sp->base = NULL; | |
97 | unlock: | |
98 | mutex_unlock(&host->syncpt_mutex); | |
99 | return NULL; | |
75471687 TB |
100 | } |
101 | ||
466749f1 TR |
102 | /** |
103 | * host1x_syncpt_id() - retrieve syncpoint ID | |
104 | * @sp: host1x syncpoint | |
105 | * | |
106 | * Given a pointer to a struct host1x_syncpt, retrieves its ID. This ID is | |
107 | * often used as a value to program into registers that control how hardware | |
108 | * blocks interact with syncpoints. | |
109 | */ | |
75471687 TB |
110 | u32 host1x_syncpt_id(struct host1x_syncpt *sp) |
111 | { | |
112 | return sp->id; | |
113 | } | |
fae798a1 | 114 | EXPORT_SYMBOL(host1x_syncpt_id); |
75471687 | 115 | |
466749f1 TR |
116 | /** |
117 | * host1x_syncpt_incr_max() - update the value sent to hardware | |
118 | * @sp: host1x syncpoint | |
119 | * @incrs: number of increments | |
75471687 TB |
120 | */ |
121 | u32 host1x_syncpt_incr_max(struct host1x_syncpt *sp, u32 incrs) | |
122 | { | |
123 | return (u32)atomic_add_return(incrs, &sp->max_val); | |
124 | } | |
64400c37 | 125 | EXPORT_SYMBOL(host1x_syncpt_incr_max); |
75471687 TB |
126 | |
127 | /* | |
128 | * Write cached syncpoint and waitbase values to hardware. | |
129 | */ | |
130 | void host1x_syncpt_restore(struct host1x *host) | |
131 | { | |
132 | struct host1x_syncpt *sp_base = host->syncpt; | |
14c95fc8 | 133 | unsigned int i; |
75471687 TB |
134 | |
135 | for (i = 0; i < host1x_syncpt_nb_pts(host); i++) | |
136 | host1x_hw_syncpt_restore(host, sp_base + i); | |
0b8070d1 | 137 | |
75471687 TB |
138 | for (i = 0; i < host1x_syncpt_nb_bases(host); i++) |
139 | host1x_hw_syncpt_restore_wait_base(host, sp_base + i); | |
0b8070d1 | 140 | |
75471687 TB |
141 | wmb(); |
142 | } | |
143 | ||
144 | /* | |
145 | * Update the cached syncpoint and waitbase values by reading them | |
146 | * from the registers. | |
147 | */ | |
148 | void host1x_syncpt_save(struct host1x *host) | |
149 | { | |
150 | struct host1x_syncpt *sp_base = host->syncpt; | |
14c95fc8 | 151 | unsigned int i; |
75471687 TB |
152 | |
153 | for (i = 0; i < host1x_syncpt_nb_pts(host); i++) { | |
154 | if (host1x_syncpt_client_managed(sp_base + i)) | |
155 | host1x_hw_syncpt_load(host, sp_base + i); | |
156 | else | |
157 | WARN_ON(!host1x_syncpt_idle(sp_base + i)); | |
158 | } | |
159 | ||
160 | for (i = 0; i < host1x_syncpt_nb_bases(host); i++) | |
161 | host1x_hw_syncpt_load_wait_base(host, sp_base + i); | |
162 | } | |
163 | ||
164 | /* | |
165 | * Updates the cached syncpoint value by reading a new value from the hardware | |
166 | * register | |
167 | */ | |
168 | u32 host1x_syncpt_load(struct host1x_syncpt *sp) | |
169 | { | |
170 | u32 val; | |
6df633d0 | 171 | |
75471687 TB |
172 | val = host1x_hw_syncpt_load(sp->host, sp); |
173 | trace_host1x_syncpt_load_min(sp->id, val); | |
174 | ||
175 | return val; | |
176 | } | |
177 | ||
178 | /* | |
179 | * Get the current syncpoint base | |
180 | */ | |
181 | u32 host1x_syncpt_load_wait_base(struct host1x_syncpt *sp) | |
182 | { | |
75471687 | 183 | host1x_hw_syncpt_load_wait_base(sp->host, sp); |
4b92e294 TR |
184 | |
185 | return sp->base_val; | |
75471687 TB |
186 | } |
187 | ||
466749f1 TR |
188 | /** |
189 | * host1x_syncpt_incr() - increment syncpoint value from CPU, updating cache | |
190 | * @sp: host1x syncpoint | |
75471687 | 191 | */ |
ebae30b1 | 192 | int host1x_syncpt_incr(struct host1x_syncpt *sp) |
75471687 | 193 | { |
ebae30b1 | 194 | return host1x_hw_syncpt_cpu_incr(sp->host, sp); |
75471687 | 195 | } |
fae798a1 | 196 | EXPORT_SYMBOL(host1x_syncpt_incr); |
75471687 | 197 | |
7ede0b0b TB |
198 | /* |
199 | * Updated sync point form hardware, and returns true if syncpoint is expired, | |
200 | * false if we may need to wait | |
201 | */ | |
202 | static bool syncpt_load_min_is_expired(struct host1x_syncpt *sp, u32 thresh) | |
203 | { | |
204 | host1x_hw_syncpt_load(sp->host, sp); | |
0b8070d1 | 205 | |
7ede0b0b TB |
206 | return host1x_syncpt_is_expired(sp, thresh); |
207 | } | |
208 | ||
466749f1 TR |
209 | /** |
210 | * host1x_syncpt_wait() - wait for a syncpoint to reach a given value | |
211 | * @sp: host1x syncpoint | |
212 | * @thresh: threshold | |
213 | * @timeout: maximum time to wait for the syncpoint to reach the given value | |
214 | * @value: return location for the syncpoint value | |
7ede0b0b TB |
215 | */ |
216 | int host1x_syncpt_wait(struct host1x_syncpt *sp, u32 thresh, long timeout, | |
0b8070d1 | 217 | u32 *value) |
7ede0b0b TB |
218 | { |
219 | DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq); | |
220 | void *ref; | |
221 | struct host1x_waitlist *waiter; | |
222 | int err = 0, check_count = 0; | |
223 | u32 val; | |
224 | ||
225 | if (value) | |
226 | *value = 0; | |
227 | ||
228 | /* first check cache */ | |
229 | if (host1x_syncpt_is_expired(sp, thresh)) { | |
230 | if (value) | |
231 | *value = host1x_syncpt_load(sp); | |
0b8070d1 | 232 | |
7ede0b0b TB |
233 | return 0; |
234 | } | |
235 | ||
236 | /* try to read from register */ | |
237 | val = host1x_hw_syncpt_load(sp->host, sp); | |
238 | if (host1x_syncpt_is_expired(sp, thresh)) { | |
239 | if (value) | |
240 | *value = val; | |
0b8070d1 | 241 | |
7ede0b0b TB |
242 | goto done; |
243 | } | |
244 | ||
245 | if (!timeout) { | |
246 | err = -EAGAIN; | |
247 | goto done; | |
248 | } | |
249 | ||
250 | /* allocate a waiter */ | |
251 | waiter = kzalloc(sizeof(*waiter), GFP_KERNEL); | |
252 | if (!waiter) { | |
253 | err = -ENOMEM; | |
254 | goto done; | |
255 | } | |
256 | ||
257 | /* schedule a wakeup when the syncpoint value is reached */ | |
258 | err = host1x_intr_add_action(sp->host, sp->id, thresh, | |
259 | HOST1X_INTR_ACTION_WAKEUP_INTERRUPTIBLE, | |
260 | &wq, waiter, &ref); | |
261 | if (err) | |
262 | goto done; | |
263 | ||
264 | err = -EAGAIN; | |
265 | /* Caller-specified timeout may be impractically low */ | |
266 | if (timeout < 0) | |
267 | timeout = LONG_MAX; | |
268 | ||
269 | /* wait for the syncpoint, or timeout, or signal */ | |
270 | while (timeout) { | |
271 | long check = min_t(long, SYNCPT_CHECK_PERIOD, timeout); | |
0b8070d1 TR |
272 | int remain; |
273 | ||
274 | remain = wait_event_interruptible_timeout(wq, | |
7ede0b0b TB |
275 | syncpt_load_min_is_expired(sp, thresh), |
276 | check); | |
277 | if (remain > 0 || host1x_syncpt_is_expired(sp, thresh)) { | |
278 | if (value) | |
279 | *value = host1x_syncpt_load(sp); | |
0b8070d1 | 280 | |
7ede0b0b | 281 | err = 0; |
0b8070d1 | 282 | |
7ede0b0b TB |
283 | break; |
284 | } | |
0b8070d1 | 285 | |
7ede0b0b TB |
286 | if (remain < 0) { |
287 | err = remain; | |
288 | break; | |
289 | } | |
0b8070d1 | 290 | |
7ede0b0b | 291 | timeout -= check; |
0b8070d1 | 292 | |
7ede0b0b TB |
293 | if (timeout && check_count <= MAX_STUCK_CHECK_COUNT) { |
294 | dev_warn(sp->host->dev, | |
5c0d8d38 | 295 | "%s: syncpoint id %u (%s) stuck waiting %d, timeout=%ld\n", |
7ede0b0b TB |
296 | current->comm, sp->id, sp->name, |
297 | thresh, timeout); | |
6236451d TB |
298 | |
299 | host1x_debug_dump_syncpts(sp->host); | |
0b8070d1 | 300 | |
6236451d TB |
301 | if (check_count == MAX_STUCK_CHECK_COUNT) |
302 | host1x_debug_dump(sp->host); | |
0b8070d1 | 303 | |
7ede0b0b TB |
304 | check_count++; |
305 | } | |
306 | } | |
0b8070d1 | 307 | |
7ede0b0b TB |
308 | host1x_intr_put_ref(sp->host, sp->id, ref); |
309 | ||
310 | done: | |
311 | return err; | |
312 | } | |
313 | EXPORT_SYMBOL(host1x_syncpt_wait); | |
314 | ||
315 | /* | |
316 | * Returns true if syncpoint is expired, false if we may need to wait | |
317 | */ | |
318 | bool host1x_syncpt_is_expired(struct host1x_syncpt *sp, u32 thresh) | |
319 | { | |
320 | u32 current_val; | |
321 | u32 future_val; | |
6df633d0 | 322 | |
7ede0b0b | 323 | smp_rmb(); |
0b8070d1 | 324 | |
7ede0b0b TB |
325 | current_val = (u32)atomic_read(&sp->min_val); |
326 | future_val = (u32)atomic_read(&sp->max_val); | |
327 | ||
328 | /* Note the use of unsigned arithmetic here (mod 1<<32). | |
329 | * | |
330 | * c = current_val = min_val = the current value of the syncpoint. | |
331 | * t = thresh = the value we are checking | |
332 | * f = future_val = max_val = the value c will reach when all | |
333 | * outstanding increments have completed. | |
334 | * | |
335 | * Note that c always chases f until it reaches f. | |
336 | * | |
337 | * Dtf = (f - t) | |
338 | * Dtc = (c - t) | |
339 | * | |
340 | * Consider all cases: | |
341 | * | |
342 | * A) .....c..t..f..... Dtf < Dtc need to wait | |
343 | * B) .....c.....f..t.. Dtf > Dtc expired | |
344 | * C) ..t..c.....f..... Dtf > Dtc expired (Dct very large) | |
345 | * | |
346 | * Any case where f==c: always expired (for any t). Dtf == Dcf | |
347 | * Any case where t==c: always expired (for any f). Dtf >= Dtc (because Dtc==0) | |
348 | * Any case where t==f!=c: always wait. Dtf < Dtc (because Dtf==0, | |
349 | * Dtc!=0) | |
350 | * | |
351 | * Other cases: | |
352 | * | |
353 | * A) .....t..f..c..... Dtf < Dtc need to wait | |
354 | * A) .....f..c..t..... Dtf < Dtc need to wait | |
355 | * A) .....f..t..c..... Dtf > Dtc expired | |
356 | * | |
357 | * So: | |
358 | * Dtf >= Dtc implies EXPIRED (return true) | |
359 | * Dtf < Dtc implies WAIT (return false) | |
360 | * | |
361 | * Note: If t is expired then we *cannot* wait on it. We would wait | |
362 | * forever (hang the system). | |
363 | * | |
364 | * Note: do NOT get clever and remove the -thresh from both sides. It | |
365 | * is NOT the same. | |
366 | * | |
367 | * If future valueis zero, we have a client managed sync point. In that | |
368 | * case we do a direct comparison. | |
369 | */ | |
370 | if (!host1x_syncpt_client_managed(sp)) | |
371 | return future_val - thresh >= current_val - thresh; | |
372 | else | |
373 | return (s32)(current_val - thresh) >= 0; | |
374 | } | |
375 | ||
75471687 TB |
376 | int host1x_syncpt_init(struct host1x *host) |
377 | { | |
f5a954fe | 378 | struct host1x_syncpt_base *bases; |
75471687 | 379 | struct host1x_syncpt *syncpt; |
14c95fc8 | 380 | unsigned int i; |
75471687 | 381 | |
b47a0491 | 382 | syncpt = devm_kcalloc(host->dev, host->info->nb_pts, sizeof(*syncpt), |
f5a954fe | 383 | GFP_KERNEL); |
75471687 TB |
384 | if (!syncpt) |
385 | return -ENOMEM; | |
386 | ||
b47a0491 | 387 | bases = devm_kcalloc(host->dev, host->info->nb_bases, sizeof(*bases), |
f5a954fe AM |
388 | GFP_KERNEL); |
389 | if (!bases) | |
390 | return -ENOMEM; | |
391 | ||
392 | for (i = 0; i < host->info->nb_pts; i++) { | |
75471687 TB |
393 | syncpt[i].id = i; |
394 | syncpt[i].host = host; | |
c3f52220 MP |
395 | |
396 | /* | |
397 | * Unassign syncpt from channels for purposes of Tegra186 | |
398 | * syncpoint protection. This prevents any channel from | |
399 | * accessing it until it is reassigned. | |
400 | */ | |
401 | host1x_hw_syncpt_assign_to_channel(host, &syncpt[i], NULL); | |
75471687 TB |
402 | } |
403 | ||
f5a954fe AM |
404 | for (i = 0; i < host->info->nb_bases; i++) |
405 | bases[i].id = i; | |
406 | ||
d4b57818 | 407 | mutex_init(&host->syncpt_mutex); |
75471687 | 408 | host->syncpt = syncpt; |
f5a954fe | 409 | host->bases = bases; |
75471687 TB |
410 | |
411 | host1x_syncpt_restore(host); | |
c3f52220 | 412 | host1x_hw_syncpt_enable_protection(host); |
75471687 | 413 | |
6579324a | 414 | /* Allocate sync point to use for clearing waits for expired fences */ |
8736fe81 | 415 | host->nop_sp = host1x_syncpt_alloc(host, NULL, 0); |
6579324a TB |
416 | if (!host->nop_sp) |
417 | return -ENOMEM; | |
418 | ||
75471687 TB |
419 | return 0; |
420 | } | |
421 | ||
466749f1 TR |
422 | /** |
423 | * host1x_syncpt_request() - request a syncpoint | |
617dd7cc | 424 | * @client: client requesting the syncpoint |
466749f1 TR |
425 | * @flags: flags |
426 | * | |
427 | * host1x client drivers can use this function to allocate a syncpoint for | |
428 | * subsequent use. A syncpoint returned by this function will be reserved for | |
429 | * use by the client exclusively. When no longer using a syncpoint, a host1x | |
430 | * client driver needs to release it using host1x_syncpt_free(). | |
431 | */ | |
617dd7cc | 432 | struct host1x_syncpt *host1x_syncpt_request(struct host1x_client *client, |
8736fe81 | 433 | unsigned long flags) |
75471687 | 434 | { |
617dd7cc | 435 | struct host1x *host = dev_get_drvdata(client->parent->parent); |
0b8070d1 | 436 | |
617dd7cc | 437 | return host1x_syncpt_alloc(host, client, flags); |
75471687 | 438 | } |
fae798a1 | 439 | EXPORT_SYMBOL(host1x_syncpt_request); |
75471687 | 440 | |
466749f1 TR |
441 | /** |
442 | * host1x_syncpt_free() - free a requested syncpoint | |
443 | * @sp: host1x syncpoint | |
444 | * | |
445 | * Release a syncpoint previously allocated using host1x_syncpt_request(). A | |
446 | * host1x client driver should call this when the syncpoint is no longer in | |
447 | * use. Note that client drivers must ensure that the syncpoint doesn't remain | |
448 | * under the control of hardware after calling this function, otherwise two | |
449 | * clients may end up trying to access the same syncpoint concurrently. | |
450 | */ | |
75471687 TB |
451 | void host1x_syncpt_free(struct host1x_syncpt *sp) |
452 | { | |
453 | if (!sp) | |
454 | return; | |
455 | ||
d4b57818 AM |
456 | mutex_lock(&sp->host->syncpt_mutex); |
457 | ||
f5a954fe | 458 | host1x_syncpt_base_free(sp->base); |
75471687 | 459 | kfree(sp->name); |
f5a954fe | 460 | sp->base = NULL; |
617dd7cc | 461 | sp->client = NULL; |
75471687 | 462 | sp->name = NULL; |
ece66891 | 463 | sp->client_managed = false; |
d4b57818 AM |
464 | |
465 | mutex_unlock(&sp->host->syncpt_mutex); | |
75471687 | 466 | } |
fae798a1 | 467 | EXPORT_SYMBOL(host1x_syncpt_free); |
75471687 TB |
468 | |
469 | void host1x_syncpt_deinit(struct host1x *host) | |
470 | { | |
75471687 | 471 | struct host1x_syncpt *sp = host->syncpt; |
14c95fc8 TR |
472 | unsigned int i; |
473 | ||
75471687 TB |
474 | for (i = 0; i < host->info->nb_pts; i++, sp++) |
475 | kfree(sp->name); | |
476 | } | |
477 | ||
466749f1 TR |
478 | /** |
479 | * host1x_syncpt_read_max() - read maximum syncpoint value | |
480 | * @sp: host1x syncpoint | |
481 | * | |
482 | * The maximum syncpoint value indicates how many operations there are in | |
483 | * queue, either in channel or in a software thread. | |
6df633d0 | 484 | */ |
35d747a8 TR |
485 | u32 host1x_syncpt_read_max(struct host1x_syncpt *sp) |
486 | { | |
487 | smp_rmb(); | |
0b8070d1 | 488 | |
35d747a8 TR |
489 | return (u32)atomic_read(&sp->max_val); |
490 | } | |
fae798a1 | 491 | EXPORT_SYMBOL(host1x_syncpt_read_max); |
35d747a8 | 492 | |
466749f1 TR |
493 | /** |
494 | * host1x_syncpt_read_min() - read minimum syncpoint value | |
495 | * @sp: host1x syncpoint | |
496 | * | |
497 | * The minimum syncpoint value is a shadow of the current sync point value in | |
498 | * hardware. | |
35d747a8 TR |
499 | */ |
500 | u32 host1x_syncpt_read_min(struct host1x_syncpt *sp) | |
501 | { | |
502 | smp_rmb(); | |
0b8070d1 | 503 | |
35d747a8 TR |
504 | return (u32)atomic_read(&sp->min_val); |
505 | } | |
fae798a1 | 506 | EXPORT_SYMBOL(host1x_syncpt_read_min); |
35d747a8 | 507 | |
466749f1 TR |
508 | /** |
509 | * host1x_syncpt_read() - read the current syncpoint value | |
510 | * @sp: host1x syncpoint | |
511 | */ | |
b4a20144 TR |
512 | u32 host1x_syncpt_read(struct host1x_syncpt *sp) |
513 | { | |
514 | return host1x_syncpt_load(sp); | |
515 | } | |
516 | EXPORT_SYMBOL(host1x_syncpt_read); | |
517 | ||
14c95fc8 | 518 | unsigned int host1x_syncpt_nb_pts(struct host1x *host) |
75471687 TB |
519 | { |
520 | return host->info->nb_pts; | |
521 | } | |
522 | ||
14c95fc8 | 523 | unsigned int host1x_syncpt_nb_bases(struct host1x *host) |
75471687 TB |
524 | { |
525 | return host->info->nb_bases; | |
526 | } | |
527 | ||
14c95fc8 | 528 | unsigned int host1x_syncpt_nb_mlocks(struct host1x *host) |
75471687 TB |
529 | { |
530 | return host->info->nb_mlocks; | |
531 | } | |
532 | ||
466749f1 TR |
533 | /** |
534 | * host1x_syncpt_get() - obtain a syncpoint by ID | |
535 | * @host: host1x controller | |
536 | * @id: syncpoint ID | |
537 | */ | |
5c0d8d38 | 538 | struct host1x_syncpt *host1x_syncpt_get(struct host1x *host, unsigned int id) |
75471687 | 539 | { |
8cadb01d | 540 | if (id >= host->info->nb_pts) |
75471687 | 541 | return NULL; |
0b8070d1 | 542 | |
75471687 TB |
543 | return host->syncpt + id; |
544 | } | |
fae798a1 | 545 | EXPORT_SYMBOL(host1x_syncpt_get); |
f5a954fe | 546 | |
466749f1 TR |
547 | /** |
548 | * host1x_syncpt_get_base() - obtain the wait base associated with a syncpoint | |
549 | * @sp: host1x syncpoint | |
550 | */ | |
f5a954fe AM |
551 | struct host1x_syncpt_base *host1x_syncpt_get_base(struct host1x_syncpt *sp) |
552 | { | |
553 | return sp ? sp->base : NULL; | |
554 | } | |
fae798a1 | 555 | EXPORT_SYMBOL(host1x_syncpt_get_base); |
f5a954fe | 556 | |
466749f1 TR |
557 | /** |
558 | * host1x_syncpt_base_id() - retrieve the ID of a syncpoint wait base | |
559 | * @base: host1x syncpoint wait base | |
560 | */ | |
f5a954fe AM |
561 | u32 host1x_syncpt_base_id(struct host1x_syncpt_base *base) |
562 | { | |
563 | return base->id; | |
564 | } | |
fae798a1 | 565 | EXPORT_SYMBOL(host1x_syncpt_base_id); |