1 // SPDX-License-Identifier: GPL-2.0-only
5  * Copyright (c) 2010-2015, NVIDIA Corporation.
10 #include <linux/dma-fence.h>
24 host1x_syncpt_base_request(struct host1x *host)  in host1x_syncpt_base_request()  argument
26 	struct host1x_syncpt_base *bases = host->bases;  in host1x_syncpt_base_request()
29 	for (i = 0; i < host->info->nb_bases; i++)  in host1x_syncpt_base_request()
33 	if (i >= host->info->nb_bases)  in host1x_syncpt_base_request()
43 		base->requested = false;  in host1x_syncpt_base_free()
47  * host1x_syncpt_alloc() - allocate a syncpoint
48  * @host: host1x device data
58 struct host1x_syncpt *host1x_syncpt_alloc(struct host1x *host,  in host1x_syncpt_alloc()  argument
62 	struct host1x_syncpt *sp = host->syncpt;  in host1x_syncpt_alloc()
69 	mutex_lock(&host->syncpt_mutex);  in host1x_syncpt_alloc()
71 	for (i = 0; i < host->info->nb_pts && kref_read(&sp->ref); i++, sp++)  in host1x_syncpt_alloc()
74 	if (i >= host->info->nb_pts)  in host1x_syncpt_alloc()
78 		sp->base = host1x_syncpt_base_request(host);  in host1x_syncpt_alloc()
79 		if (!sp->base)  in host1x_syncpt_alloc()
83 	full_name = kasprintf(GFP_KERNEL, "%u-%s", sp->id, name);  in host1x_syncpt_alloc()
87 	sp->name = full_name;  in host1x_syncpt_alloc()
90 		sp->client_managed = true;  in host1x_syncpt_alloc()
92 		sp->client_managed = false;  in host1x_syncpt_alloc()
94 	kref_init(&sp->ref);  in host1x_syncpt_alloc()
96 	mutex_unlock(&host->syncpt_mutex);  in host1x_syncpt_alloc()
100 	host1x_syncpt_base_free(sp->base);  in host1x_syncpt_alloc()
101 	sp->base = NULL;  in host1x_syncpt_alloc()
103 	mutex_unlock(&host->syncpt_mutex);  in host1x_syncpt_alloc()
109  * host1x_syncpt_id() - retrieve syncpoint ID
112  * Given a pointer to a struct host1x_syncpt, retrieves its ID. This ID is
118 	return sp->id;  in host1x_syncpt_id()
123  * host1x_syncpt_incr_max() - update the value sent to hardware
129 	return (u32)atomic_add_return(incrs, &sp->max_val);  in host1x_syncpt_incr_max()
136 void host1x_syncpt_restore(struct host1x *host)  in host1x_syncpt_restore()  argument
138 	struct host1x_syncpt *sp_base = host->syncpt;  in host1x_syncpt_restore()
141 	for (i = 0; i < host1x_syncpt_nb_pts(host); i++) {  in host1x_syncpt_restore()
147 		host1x_hw_syncpt_assign_to_channel(host, sp_base + i, NULL);  in host1x_syncpt_restore()
148 		host1x_hw_syncpt_restore(host, sp_base + i);  in host1x_syncpt_restore()
151 	for (i = 0; i < host1x_syncpt_nb_bases(host); i++)  in host1x_syncpt_restore()
152 		host1x_hw_syncpt_restore_wait_base(host, sp_base + i);  in host1x_syncpt_restore()
154 	host1x_hw_syncpt_enable_protection(host);  in host1x_syncpt_restore()
163 void host1x_syncpt_save(struct host1x *host)  in host1x_syncpt_save()  argument
165 	struct host1x_syncpt *sp_base = host->syncpt;  in host1x_syncpt_save()
168 	for (i = 0; i < host1x_syncpt_nb_pts(host); i++) {  in host1x_syncpt_save()
170 			host1x_hw_syncpt_load(host, sp_base + i);  in host1x_syncpt_save()
175 	for (i = 0; i < host1x_syncpt_nb_bases(host); i++)  in host1x_syncpt_save()
176 		host1x_hw_syncpt_load_wait_base(host, sp_base + i);  in host1x_syncpt_save()
187 	val = host1x_hw_syncpt_load(sp->host, sp);  in host1x_syncpt_load()
188 	trace_host1x_syncpt_load_min(sp->id, val);  in host1x_syncpt_load()
198 	host1x_hw_syncpt_load_wait_base(sp->host, sp);  in host1x_syncpt_load_wait_base()
200 	return sp->base_val;  in host1x_syncpt_load_wait_base()
204  * host1x_syncpt_incr() - increment syncpoint value from CPU, updating cache
209 	return host1x_hw_syncpt_cpu_incr(sp->host, sp);  in host1x_syncpt_incr()
214  * host1x_syncpt_wait() - wait for a syncpoint to reach a given value
226 	host1x_hw_syncpt_load(sp->host, sp);  in host1x_syncpt_wait()
237 		return -EAGAIN;  in host1x_syncpt_wait()
256 	host1x_hw_syncpt_load(sp->host, sp);  in host1x_syncpt_wait()
258 		return -EAGAIN;  in host1x_syncpt_wait()
275 	current_val = (u32)atomic_read(&sp->min_val);  in host1x_syncpt_is_expired()
277 	return ((current_val - thresh) & 0x80000000U) == 0U;  in host1x_syncpt_is_expired()
280 int host1x_syncpt_init(struct host1x *host)  in host1x_syncpt_init()  argument
286 	syncpt = devm_kcalloc(host->dev, host->info->nb_pts, sizeof(*syncpt),  in host1x_syncpt_init()
289 		return -ENOMEM;  in host1x_syncpt_init()
291 	bases = devm_kcalloc(host->dev, host->info->nb_bases, sizeof(*bases),  in host1x_syncpt_init()
294 		return -ENOMEM;  in host1x_syncpt_init()
296 	for (i = 0; i < host->info->nb_pts; i++) {  in host1x_syncpt_init()
297 		syncpt[i].id = i;  in host1x_syncpt_init()
298 		syncpt[i].host = host;  in host1x_syncpt_init()
301 	for (i = 0; i < host->info->nb_bases; i++)  in host1x_syncpt_init()
302 		bases[i].id = i;  in host1x_syncpt_init()
304 	mutex_init(&host->syncpt_mutex);  in host1x_syncpt_init()
305 	host->syncpt = syncpt;  in host1x_syncpt_init()
306 	host->bases = bases;  in host1x_syncpt_init()
309 	host->nop_sp = host1x_syncpt_alloc(host, 0, "reserved-nop");  in host1x_syncpt_init()
310 	if (!host->nop_sp)  in host1x_syncpt_init()
311 		return -ENOMEM;  in host1x_syncpt_init()
313 	if (host->info->reserve_vblank_syncpts) {  in host1x_syncpt_init()
314 		kref_init(&host->syncpt[26].ref);  in host1x_syncpt_init()
315 		kref_init(&host->syncpt[27].ref);  in host1x_syncpt_init()
322  * host1x_syncpt_request() - request a syncpoint
334 	struct host1x *host = dev_get_drvdata(client->host->parent);  in host1x_syncpt_request()  local
336 	return host1x_syncpt_alloc(host, flags, dev_name(client->dev));  in host1x_syncpt_request()
344 	atomic_set(&sp->max_val, host1x_syncpt_read(sp));  in syncpt_release()
346 	sp->locked = false;  in syncpt_release()
348 	mutex_lock(&sp->host->syncpt_mutex);  in syncpt_release()
350 	host1x_syncpt_base_free(sp->base);  in syncpt_release()
351 	kfree(sp->name);  in syncpt_release()
352 	sp->base = NULL;  in syncpt_release()
353 	sp->name = NULL;  in syncpt_release()
354 	sp->client_managed = false;  in syncpt_release()
356 	mutex_unlock(&sp->host->syncpt_mutex);  in syncpt_release()
360  * host1x_syncpt_put() - free a requested syncpoint
372 	kref_put(&sp->ref, syncpt_release);  in host1x_syncpt_put()
376 void host1x_syncpt_deinit(struct host1x *host)  in host1x_syncpt_deinit()  argument
378 	struct host1x_syncpt *sp = host->syncpt;  in host1x_syncpt_deinit()
381 	for (i = 0; i < host->info->nb_pts; i++, sp++)  in host1x_syncpt_deinit()
382 		kfree(sp->name);  in host1x_syncpt_deinit()
386  * host1x_syncpt_read_max() - read maximum syncpoint value
396 	return (u32)atomic_read(&sp->max_val);  in host1x_syncpt_read_max()
401  * host1x_syncpt_read_min() - read minimum syncpoint value
411 	return (u32)atomic_read(&sp->min_val);  in host1x_syncpt_read_min()
416  * host1x_syncpt_read() - read the current syncpoint value
425 unsigned int host1x_syncpt_nb_pts(struct host1x *host)  in host1x_syncpt_nb_pts()  argument
427 	return host->info->nb_pts;  in host1x_syncpt_nb_pts()
430 unsigned int host1x_syncpt_nb_bases(struct host1x *host)  in host1x_syncpt_nb_bases()  argument
432 	return host->info->nb_bases;  in host1x_syncpt_nb_bases()
435 unsigned int host1x_syncpt_nb_mlocks(struct host1x *host)  in host1x_syncpt_nb_mlocks()  argument
437 	return host->info->nb_mlocks;  in host1x_syncpt_nb_mlocks()
441  * host1x_syncpt_get_by_id() - obtain a syncpoint by ID
442  * @host: host1x controller
443  * @id: syncpoint ID
445 struct host1x_syncpt *host1x_syncpt_get_by_id(struct host1x *host,  in host1x_syncpt_get_by_id()  argument
446 					      unsigned int id)  in host1x_syncpt_get_by_id()  argument
448 	if (id >= host->info->nb_pts)  in host1x_syncpt_get_by_id()
451 	if (kref_get_unless_zero(&host->syncpt[id].ref))  in host1x_syncpt_get_by_id()
452 		return &host->syncpt[id];  in host1x_syncpt_get_by_id()
459  * host1x_syncpt_get_by_id_noref() - obtain a syncpoint by ID but don't
461  * @host: host1x controller
462  * @id: syncpoint ID
464 struct host1x_syncpt *host1x_syncpt_get_by_id_noref(struct host1x *host,  in host1x_syncpt_get_by_id_noref()  argument
465 						    unsigned int id)  in host1x_syncpt_get_by_id_noref()  argument
467 	if (id >= host->info->nb_pts)  in host1x_syncpt_get_by_id_noref()
470 	return &host->syncpt[id];  in host1x_syncpt_get_by_id_noref()
475  * host1x_syncpt_get() - increment syncpoint refcount
480 	kref_get(&sp->ref);  in host1x_syncpt_get()
487  * host1x_syncpt_get_base() - obtain the wait base associated with a syncpoint
492 	return sp ? sp->base : NULL;  in host1x_syncpt_get_base()
497  * host1x_syncpt_base_id() - retrieve the ID of a syncpoint wait base
502 	return base->id;  in host1x_syncpt_base_id()
511  * host1x_syncpt_release_vblank_reservation() - Make VBLANK syncpoint
515  * @syncpt_id: syncpoint ID to make available
525 	struct host1x *host = dev_get_drvdata(client->host->parent);  in host1x_syncpt_release_vblank_reservation()  local
527 	if (!host->info->reserve_vblank_syncpts)  in host1x_syncpt_release_vblank_reservation()
530 	kref_put(&host->syncpt[syncpt_id].ref, do_nothing);  in host1x_syncpt_release_vblank_reservation()