Commit | Line | Data |
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9952f691 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
75471687 TB |
2 | /* |
3 | * Tegra host1x Syncpoints | |
4 | * | |
d4b57818 | 5 | * Copyright (c) 2010-2015, NVIDIA Corporation. |
75471687 TB |
6 | */ |
7 | ||
8 | #include <linux/module.h> | |
9 | #include <linux/device.h> | |
10 | #include <linux/slab.h> | |
11 | ||
12 | #include <trace/events/host1x.h> | |
13 | ||
14 | #include "syncpt.h" | |
15 | #include "dev.h" | |
7ede0b0b | 16 | #include "intr.h" |
6236451d | 17 | #include "debug.h" |
7ede0b0b TB |
18 | |
19 | #define SYNCPT_CHECK_PERIOD (2 * HZ) | |
20 | #define MAX_STUCK_CHECK_COUNT 15 | |
75471687 | 21 | |
f5a954fe AM |
22 | static struct host1x_syncpt_base * |
23 | host1x_syncpt_base_request(struct host1x *host) | |
24 | { | |
25 | struct host1x_syncpt_base *bases = host->bases; | |
26 | unsigned int i; | |
27 | ||
28 | for (i = 0; i < host->info->nb_bases; i++) | |
29 | if (!bases[i].requested) | |
30 | break; | |
31 | ||
32 | if (i >= host->info->nb_bases) | |
33 | return NULL; | |
34 | ||
35 | bases[i].requested = true; | |
36 | return &bases[i]; | |
37 | } | |
38 | ||
39 | static void host1x_syncpt_base_free(struct host1x_syncpt_base *base) | |
40 | { | |
41 | if (base) | |
42 | base->requested = false; | |
43 | } | |
44 | ||
8736fe81 | 45 | static struct host1x_syncpt *host1x_syncpt_alloc(struct host1x *host, |
617dd7cc | 46 | struct host1x_client *client, |
8736fe81 | 47 | unsigned long flags) |
75471687 | 48 | { |
75471687 | 49 | struct host1x_syncpt *sp = host->syncpt; |
d4ad3ad9 | 50 | unsigned int i; |
75471687 TB |
51 | char *name; |
52 | ||
d4b57818 AM |
53 | mutex_lock(&host->syncpt_mutex); |
54 | ||
75471687 TB |
55 | for (i = 0; i < host->info->nb_pts && sp->name; i++, sp++) |
56 | ; | |
edeabfcb AM |
57 | |
58 | if (i >= host->info->nb_pts) | |
d4b57818 | 59 | goto unlock; |
75471687 | 60 | |
f5a954fe AM |
61 | if (flags & HOST1X_SYNCPT_HAS_BASE) { |
62 | sp->base = host1x_syncpt_base_request(host); | |
63 | if (!sp->base) | |
d4b57818 | 64 | goto unlock; |
f5a954fe AM |
65 | } |
66 | ||
5c0d8d38 | 67 | name = kasprintf(GFP_KERNEL, "%02u-%s", sp->id, |
617dd7cc | 68 | client ? dev_name(client->dev) : NULL); |
75471687 | 69 | if (!name) |
d4b57818 | 70 | goto free_base; |
75471687 | 71 | |
617dd7cc | 72 | sp->client = client; |
75471687 | 73 | sp->name = name; |
8736fe81 AM |
74 | |
75 | if (flags & HOST1X_SYNCPT_CLIENT_MANAGED) | |
76 | sp->client_managed = true; | |
77 | else | |
78 | sp->client_managed = false; | |
75471687 | 79 | |
d4b57818 | 80 | mutex_unlock(&host->syncpt_mutex); |
75471687 | 81 | return sp; |
d4b57818 AM |
82 | |
83 | free_base: | |
84 | host1x_syncpt_base_free(sp->base); | |
85 | sp->base = NULL; | |
86 | unlock: | |
87 | mutex_unlock(&host->syncpt_mutex); | |
88 | return NULL; | |
75471687 TB |
89 | } |
90 | ||
466749f1 TR |
91 | /** |
92 | * host1x_syncpt_id() - retrieve syncpoint ID | |
93 | * @sp: host1x syncpoint | |
94 | * | |
95 | * Given a pointer to a struct host1x_syncpt, retrieves its ID. This ID is | |
96 | * often used as a value to program into registers that control how hardware | |
97 | * blocks interact with syncpoints. | |
98 | */ | |
75471687 TB |
99 | u32 host1x_syncpt_id(struct host1x_syncpt *sp) |
100 | { | |
101 | return sp->id; | |
102 | } | |
fae798a1 | 103 | EXPORT_SYMBOL(host1x_syncpt_id); |
75471687 | 104 | |
466749f1 TR |
105 | /** |
106 | * host1x_syncpt_incr_max() - update the value sent to hardware | |
107 | * @sp: host1x syncpoint | |
108 | * @incrs: number of increments | |
75471687 TB |
109 | */ |
110 | u32 host1x_syncpt_incr_max(struct host1x_syncpt *sp, u32 incrs) | |
111 | { | |
112 | return (u32)atomic_add_return(incrs, &sp->max_val); | |
113 | } | |
64400c37 | 114 | EXPORT_SYMBOL(host1x_syncpt_incr_max); |
75471687 TB |
115 | |
116 | /* | |
117 | * Write cached syncpoint and waitbase values to hardware. | |
118 | */ | |
119 | void host1x_syncpt_restore(struct host1x *host) | |
120 | { | |
121 | struct host1x_syncpt *sp_base = host->syncpt; | |
14c95fc8 | 122 | unsigned int i; |
75471687 TB |
123 | |
124 | for (i = 0; i < host1x_syncpt_nb_pts(host); i++) | |
125 | host1x_hw_syncpt_restore(host, sp_base + i); | |
0b8070d1 | 126 | |
75471687 TB |
127 | for (i = 0; i < host1x_syncpt_nb_bases(host); i++) |
128 | host1x_hw_syncpt_restore_wait_base(host, sp_base + i); | |
0b8070d1 | 129 | |
75471687 TB |
130 | wmb(); |
131 | } | |
132 | ||
133 | /* | |
134 | * Update the cached syncpoint and waitbase values by reading them | |
135 | * from the registers. | |
136 | */ | |
137 | void host1x_syncpt_save(struct host1x *host) | |
138 | { | |
139 | struct host1x_syncpt *sp_base = host->syncpt; | |
14c95fc8 | 140 | unsigned int i; |
75471687 TB |
141 | |
142 | for (i = 0; i < host1x_syncpt_nb_pts(host); i++) { | |
143 | if (host1x_syncpt_client_managed(sp_base + i)) | |
144 | host1x_hw_syncpt_load(host, sp_base + i); | |
145 | else | |
146 | WARN_ON(!host1x_syncpt_idle(sp_base + i)); | |
147 | } | |
148 | ||
149 | for (i = 0; i < host1x_syncpt_nb_bases(host); i++) | |
150 | host1x_hw_syncpt_load_wait_base(host, sp_base + i); | |
151 | } | |
152 | ||
153 | /* | |
154 | * Updates the cached syncpoint value by reading a new value from the hardware | |
155 | * register | |
156 | */ | |
157 | u32 host1x_syncpt_load(struct host1x_syncpt *sp) | |
158 | { | |
159 | u32 val; | |
6df633d0 | 160 | |
75471687 TB |
161 | val = host1x_hw_syncpt_load(sp->host, sp); |
162 | trace_host1x_syncpt_load_min(sp->id, val); | |
163 | ||
164 | return val; | |
165 | } | |
166 | ||
167 | /* | |
168 | * Get the current syncpoint base | |
169 | */ | |
170 | u32 host1x_syncpt_load_wait_base(struct host1x_syncpt *sp) | |
171 | { | |
75471687 | 172 | host1x_hw_syncpt_load_wait_base(sp->host, sp); |
4b92e294 TR |
173 | |
174 | return sp->base_val; | |
75471687 TB |
175 | } |
176 | ||
466749f1 TR |
177 | /** |
178 | * host1x_syncpt_incr() - increment syncpoint value from CPU, updating cache | |
179 | * @sp: host1x syncpoint | |
75471687 | 180 | */ |
ebae30b1 | 181 | int host1x_syncpt_incr(struct host1x_syncpt *sp) |
75471687 | 182 | { |
ebae30b1 | 183 | return host1x_hw_syncpt_cpu_incr(sp->host, sp); |
75471687 | 184 | } |
fae798a1 | 185 | EXPORT_SYMBOL(host1x_syncpt_incr); |
75471687 | 186 | |
7ede0b0b TB |
187 | /* |
188 | * Updated sync point form hardware, and returns true if syncpoint is expired, | |
189 | * false if we may need to wait | |
190 | */ | |
191 | static bool syncpt_load_min_is_expired(struct host1x_syncpt *sp, u32 thresh) | |
192 | { | |
193 | host1x_hw_syncpt_load(sp->host, sp); | |
0b8070d1 | 194 | |
7ede0b0b TB |
195 | return host1x_syncpt_is_expired(sp, thresh); |
196 | } | |
197 | ||
466749f1 TR |
198 | /** |
199 | * host1x_syncpt_wait() - wait for a syncpoint to reach a given value | |
200 | * @sp: host1x syncpoint | |
201 | * @thresh: threshold | |
202 | * @timeout: maximum time to wait for the syncpoint to reach the given value | |
203 | * @value: return location for the syncpoint value | |
7ede0b0b TB |
204 | */ |
205 | int host1x_syncpt_wait(struct host1x_syncpt *sp, u32 thresh, long timeout, | |
0b8070d1 | 206 | u32 *value) |
7ede0b0b TB |
207 | { |
208 | DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq); | |
209 | void *ref; | |
210 | struct host1x_waitlist *waiter; | |
211 | int err = 0, check_count = 0; | |
212 | u32 val; | |
213 | ||
214 | if (value) | |
215 | *value = 0; | |
216 | ||
217 | /* first check cache */ | |
218 | if (host1x_syncpt_is_expired(sp, thresh)) { | |
219 | if (value) | |
220 | *value = host1x_syncpt_load(sp); | |
0b8070d1 | 221 | |
7ede0b0b TB |
222 | return 0; |
223 | } | |
224 | ||
225 | /* try to read from register */ | |
226 | val = host1x_hw_syncpt_load(sp->host, sp); | |
227 | if (host1x_syncpt_is_expired(sp, thresh)) { | |
228 | if (value) | |
229 | *value = val; | |
0b8070d1 | 230 | |
7ede0b0b TB |
231 | goto done; |
232 | } | |
233 | ||
234 | if (!timeout) { | |
235 | err = -EAGAIN; | |
236 | goto done; | |
237 | } | |
238 | ||
239 | /* allocate a waiter */ | |
240 | waiter = kzalloc(sizeof(*waiter), GFP_KERNEL); | |
241 | if (!waiter) { | |
242 | err = -ENOMEM; | |
243 | goto done; | |
244 | } | |
245 | ||
246 | /* schedule a wakeup when the syncpoint value is reached */ | |
ac330f45 | 247 | err = host1x_intr_add_action(sp->host, sp, thresh, |
7ede0b0b TB |
248 | HOST1X_INTR_ACTION_WAKEUP_INTERRUPTIBLE, |
249 | &wq, waiter, &ref); | |
250 | if (err) | |
251 | goto done; | |
252 | ||
253 | err = -EAGAIN; | |
254 | /* Caller-specified timeout may be impractically low */ | |
255 | if (timeout < 0) | |
256 | timeout = LONG_MAX; | |
257 | ||
258 | /* wait for the syncpoint, or timeout, or signal */ | |
259 | while (timeout) { | |
260 | long check = min_t(long, SYNCPT_CHECK_PERIOD, timeout); | |
0b8070d1 TR |
261 | int remain; |
262 | ||
263 | remain = wait_event_interruptible_timeout(wq, | |
7ede0b0b TB |
264 | syncpt_load_min_is_expired(sp, thresh), |
265 | check); | |
266 | if (remain > 0 || host1x_syncpt_is_expired(sp, thresh)) { | |
267 | if (value) | |
268 | *value = host1x_syncpt_load(sp); | |
0b8070d1 | 269 | |
7ede0b0b | 270 | err = 0; |
0b8070d1 | 271 | |
7ede0b0b TB |
272 | break; |
273 | } | |
0b8070d1 | 274 | |
7ede0b0b TB |
275 | if (remain < 0) { |
276 | err = remain; | |
277 | break; | |
278 | } | |
0b8070d1 | 279 | |
7ede0b0b | 280 | timeout -= check; |
0b8070d1 | 281 | |
7ede0b0b TB |
282 | if (timeout && check_count <= MAX_STUCK_CHECK_COUNT) { |
283 | dev_warn(sp->host->dev, | |
5c0d8d38 | 284 | "%s: syncpoint id %u (%s) stuck waiting %d, timeout=%ld\n", |
7ede0b0b TB |
285 | current->comm, sp->id, sp->name, |
286 | thresh, timeout); | |
6236451d TB |
287 | |
288 | host1x_debug_dump_syncpts(sp->host); | |
0b8070d1 | 289 | |
6236451d TB |
290 | if (check_count == MAX_STUCK_CHECK_COUNT) |
291 | host1x_debug_dump(sp->host); | |
0b8070d1 | 292 | |
7ede0b0b TB |
293 | check_count++; |
294 | } | |
295 | } | |
0b8070d1 | 296 | |
7ede0b0b TB |
297 | host1x_intr_put_ref(sp->host, sp->id, ref); |
298 | ||
299 | done: | |
300 | return err; | |
301 | } | |
302 | EXPORT_SYMBOL(host1x_syncpt_wait); | |
303 | ||
304 | /* | |
305 | * Returns true if syncpoint is expired, false if we may need to wait | |
306 | */ | |
307 | bool host1x_syncpt_is_expired(struct host1x_syncpt *sp, u32 thresh) | |
308 | { | |
309 | u32 current_val; | |
310 | u32 future_val; | |
6df633d0 | 311 | |
7ede0b0b | 312 | smp_rmb(); |
0b8070d1 | 313 | |
7ede0b0b TB |
314 | current_val = (u32)atomic_read(&sp->min_val); |
315 | future_val = (u32)atomic_read(&sp->max_val); | |
316 | ||
317 | /* Note the use of unsigned arithmetic here (mod 1<<32). | |
318 | * | |
319 | * c = current_val = min_val = the current value of the syncpoint. | |
320 | * t = thresh = the value we are checking | |
321 | * f = future_val = max_val = the value c will reach when all | |
322 | * outstanding increments have completed. | |
323 | * | |
324 | * Note that c always chases f until it reaches f. | |
325 | * | |
326 | * Dtf = (f - t) | |
327 | * Dtc = (c - t) | |
328 | * | |
329 | * Consider all cases: | |
330 | * | |
331 | * A) .....c..t..f..... Dtf < Dtc need to wait | |
332 | * B) .....c.....f..t.. Dtf > Dtc expired | |
333 | * C) ..t..c.....f..... Dtf > Dtc expired (Dct very large) | |
334 | * | |
335 | * Any case where f==c: always expired (for any t). Dtf == Dcf | |
336 | * Any case where t==c: always expired (for any f). Dtf >= Dtc (because Dtc==0) | |
337 | * Any case where t==f!=c: always wait. Dtf < Dtc (because Dtf==0, | |
338 | * Dtc!=0) | |
339 | * | |
340 | * Other cases: | |
341 | * | |
342 | * A) .....t..f..c..... Dtf < Dtc need to wait | |
343 | * A) .....f..c..t..... Dtf < Dtc need to wait | |
344 | * A) .....f..t..c..... Dtf > Dtc expired | |
345 | * | |
346 | * So: | |
347 | * Dtf >= Dtc implies EXPIRED (return true) | |
348 | * Dtf < Dtc implies WAIT (return false) | |
349 | * | |
350 | * Note: If t is expired then we *cannot* wait on it. We would wait | |
351 | * forever (hang the system). | |
352 | * | |
353 | * Note: do NOT get clever and remove the -thresh from both sides. It | |
354 | * is NOT the same. | |
355 | * | |
356 | * If future valueis zero, we have a client managed sync point. In that | |
357 | * case we do a direct comparison. | |
358 | */ | |
359 | if (!host1x_syncpt_client_managed(sp)) | |
360 | return future_val - thresh >= current_val - thresh; | |
361 | else | |
362 | return (s32)(current_val - thresh) >= 0; | |
363 | } | |
364 | ||
75471687 TB |
365 | int host1x_syncpt_init(struct host1x *host) |
366 | { | |
f5a954fe | 367 | struct host1x_syncpt_base *bases; |
75471687 | 368 | struct host1x_syncpt *syncpt; |
14c95fc8 | 369 | unsigned int i; |
75471687 | 370 | |
b47a0491 | 371 | syncpt = devm_kcalloc(host->dev, host->info->nb_pts, sizeof(*syncpt), |
f5a954fe | 372 | GFP_KERNEL); |
75471687 TB |
373 | if (!syncpt) |
374 | return -ENOMEM; | |
375 | ||
b47a0491 | 376 | bases = devm_kcalloc(host->dev, host->info->nb_bases, sizeof(*bases), |
f5a954fe AM |
377 | GFP_KERNEL); |
378 | if (!bases) | |
379 | return -ENOMEM; | |
380 | ||
381 | for (i = 0; i < host->info->nb_pts; i++) { | |
75471687 TB |
382 | syncpt[i].id = i; |
383 | syncpt[i].host = host; | |
c3f52220 MP |
384 | |
385 | /* | |
386 | * Unassign syncpt from channels for purposes of Tegra186 | |
387 | * syncpoint protection. This prevents any channel from | |
388 | * accessing it until it is reassigned. | |
389 | */ | |
390 | host1x_hw_syncpt_assign_to_channel(host, &syncpt[i], NULL); | |
75471687 TB |
391 | } |
392 | ||
f5a954fe AM |
393 | for (i = 0; i < host->info->nb_bases; i++) |
394 | bases[i].id = i; | |
395 | ||
d4b57818 | 396 | mutex_init(&host->syncpt_mutex); |
75471687 | 397 | host->syncpt = syncpt; |
f5a954fe | 398 | host->bases = bases; |
75471687 TB |
399 | |
400 | host1x_syncpt_restore(host); | |
c3f52220 | 401 | host1x_hw_syncpt_enable_protection(host); |
75471687 | 402 | |
6579324a | 403 | /* Allocate sync point to use for clearing waits for expired fences */ |
8736fe81 | 404 | host->nop_sp = host1x_syncpt_alloc(host, NULL, 0); |
6579324a TB |
405 | if (!host->nop_sp) |
406 | return -ENOMEM; | |
407 | ||
75471687 TB |
408 | return 0; |
409 | } | |
410 | ||
466749f1 TR |
411 | /** |
412 | * host1x_syncpt_request() - request a syncpoint | |
617dd7cc | 413 | * @client: client requesting the syncpoint |
466749f1 TR |
414 | * @flags: flags |
415 | * | |
416 | * host1x client drivers can use this function to allocate a syncpoint for | |
417 | * subsequent use. A syncpoint returned by this function will be reserved for | |
418 | * use by the client exclusively. When no longer using a syncpoint, a host1x | |
419 | * client driver needs to release it using host1x_syncpt_free(). | |
420 | */ | |
617dd7cc | 421 | struct host1x_syncpt *host1x_syncpt_request(struct host1x_client *client, |
8736fe81 | 422 | unsigned long flags) |
75471687 | 423 | { |
617dd7cc | 424 | struct host1x *host = dev_get_drvdata(client->parent->parent); |
0b8070d1 | 425 | |
617dd7cc | 426 | return host1x_syncpt_alloc(host, client, flags); |
75471687 | 427 | } |
fae798a1 | 428 | EXPORT_SYMBOL(host1x_syncpt_request); |
75471687 | 429 | |
466749f1 TR |
430 | /** |
431 | * host1x_syncpt_free() - free a requested syncpoint | |
432 | * @sp: host1x syncpoint | |
433 | * | |
434 | * Release a syncpoint previously allocated using host1x_syncpt_request(). A | |
435 | * host1x client driver should call this when the syncpoint is no longer in | |
436 | * use. Note that client drivers must ensure that the syncpoint doesn't remain | |
437 | * under the control of hardware after calling this function, otherwise two | |
438 | * clients may end up trying to access the same syncpoint concurrently. | |
439 | */ | |
75471687 TB |
440 | void host1x_syncpt_free(struct host1x_syncpt *sp) |
441 | { | |
442 | if (!sp) | |
443 | return; | |
444 | ||
d4b57818 AM |
445 | mutex_lock(&sp->host->syncpt_mutex); |
446 | ||
f5a954fe | 447 | host1x_syncpt_base_free(sp->base); |
75471687 | 448 | kfree(sp->name); |
f5a954fe | 449 | sp->base = NULL; |
617dd7cc | 450 | sp->client = NULL; |
75471687 | 451 | sp->name = NULL; |
ece66891 | 452 | sp->client_managed = false; |
d4b57818 AM |
453 | |
454 | mutex_unlock(&sp->host->syncpt_mutex); | |
75471687 | 455 | } |
fae798a1 | 456 | EXPORT_SYMBOL(host1x_syncpt_free); |
75471687 TB |
457 | |
458 | void host1x_syncpt_deinit(struct host1x *host) | |
459 | { | |
75471687 | 460 | struct host1x_syncpt *sp = host->syncpt; |
14c95fc8 TR |
461 | unsigned int i; |
462 | ||
75471687 TB |
463 | for (i = 0; i < host->info->nb_pts; i++, sp++) |
464 | kfree(sp->name); | |
465 | } | |
466 | ||
466749f1 TR |
467 | /** |
468 | * host1x_syncpt_read_max() - read maximum syncpoint value | |
469 | * @sp: host1x syncpoint | |
470 | * | |
471 | * The maximum syncpoint value indicates how many operations there are in | |
472 | * queue, either in channel or in a software thread. | |
6df633d0 | 473 | */ |
35d747a8 TR |
474 | u32 host1x_syncpt_read_max(struct host1x_syncpt *sp) |
475 | { | |
476 | smp_rmb(); | |
0b8070d1 | 477 | |
35d747a8 TR |
478 | return (u32)atomic_read(&sp->max_val); |
479 | } | |
fae798a1 | 480 | EXPORT_SYMBOL(host1x_syncpt_read_max); |
35d747a8 | 481 | |
466749f1 TR |
482 | /** |
483 | * host1x_syncpt_read_min() - read minimum syncpoint value | |
484 | * @sp: host1x syncpoint | |
485 | * | |
486 | * The minimum syncpoint value is a shadow of the current sync point value in | |
487 | * hardware. | |
35d747a8 TR |
488 | */ |
489 | u32 host1x_syncpt_read_min(struct host1x_syncpt *sp) | |
490 | { | |
491 | smp_rmb(); | |
0b8070d1 | 492 | |
35d747a8 TR |
493 | return (u32)atomic_read(&sp->min_val); |
494 | } | |
fae798a1 | 495 | EXPORT_SYMBOL(host1x_syncpt_read_min); |
35d747a8 | 496 | |
466749f1 TR |
497 | /** |
498 | * host1x_syncpt_read() - read the current syncpoint value | |
499 | * @sp: host1x syncpoint | |
500 | */ | |
b4a20144 TR |
501 | u32 host1x_syncpt_read(struct host1x_syncpt *sp) |
502 | { | |
503 | return host1x_syncpt_load(sp); | |
504 | } | |
505 | EXPORT_SYMBOL(host1x_syncpt_read); | |
506 | ||
14c95fc8 | 507 | unsigned int host1x_syncpt_nb_pts(struct host1x *host) |
75471687 TB |
508 | { |
509 | return host->info->nb_pts; | |
510 | } | |
511 | ||
14c95fc8 | 512 | unsigned int host1x_syncpt_nb_bases(struct host1x *host) |
75471687 TB |
513 | { |
514 | return host->info->nb_bases; | |
515 | } | |
516 | ||
14c95fc8 | 517 | unsigned int host1x_syncpt_nb_mlocks(struct host1x *host) |
75471687 TB |
518 | { |
519 | return host->info->nb_mlocks; | |
520 | } | |
521 | ||
466749f1 TR |
522 | /** |
523 | * host1x_syncpt_get() - obtain a syncpoint by ID | |
524 | * @host: host1x controller | |
525 | * @id: syncpoint ID | |
526 | */ | |
5c0d8d38 | 527 | struct host1x_syncpt *host1x_syncpt_get(struct host1x *host, unsigned int id) |
75471687 | 528 | { |
8cadb01d | 529 | if (id >= host->info->nb_pts) |
75471687 | 530 | return NULL; |
0b8070d1 | 531 | |
75471687 TB |
532 | return host->syncpt + id; |
533 | } | |
fae798a1 | 534 | EXPORT_SYMBOL(host1x_syncpt_get); |
f5a954fe | 535 | |
466749f1 TR |
536 | /** |
537 | * host1x_syncpt_get_base() - obtain the wait base associated with a syncpoint | |
538 | * @sp: host1x syncpoint | |
539 | */ | |
f5a954fe AM |
540 | struct host1x_syncpt_base *host1x_syncpt_get_base(struct host1x_syncpt *sp) |
541 | { | |
542 | return sp ? sp->base : NULL; | |
543 | } | |
fae798a1 | 544 | EXPORT_SYMBOL(host1x_syncpt_get_base); |
f5a954fe | 545 | |
466749f1 TR |
546 | /** |
547 | * host1x_syncpt_base_id() - retrieve the ID of a syncpoint wait base | |
548 | * @base: host1x syncpoint wait base | |
549 | */ | |
f5a954fe AM |
550 | u32 host1x_syncpt_base_id(struct host1x_syncpt_base *base) |
551 | { | |
552 | return base->id; | |
553 | } | |
fae798a1 | 554 | EXPORT_SYMBOL(host1x_syncpt_base_id); |