From: Ben Skeggs Date: Wed, 30 Jan 2013 14:38:22 +0000 (+1000) Subject: drm/nouveau/core: basic event interface between core and drm X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=51fa0253fbc5cdf26b85f620bf1a1034e2eda868;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git drm/nouveau/core: basic event interface between core and drm Signed-off-by: Ben Skeggs --- diff --git a/drivers/gpu/drm/nouveau/Makefile b/drivers/gpu/drm/nouveau/Makefile index 6985740afa1..6d4cb8aec4d 100644 --- a/drivers/gpu/drm/nouveau/Makefile +++ b/drivers/gpu/drm/nouveau/Makefile @@ -11,6 +11,7 @@ nouveau-y := core/core/client.o nouveau-y += core/core/engctx.o nouveau-y += core/core/engine.o nouveau-y += core/core/enum.o +nouveau-y += core/core/event.o nouveau-y += core/core/falcon.o nouveau-y += core/core/gpuobj.o nouveau-y += core/core/handle.o diff --git a/drivers/gpu/drm/nouveau/core/core/event.c b/drivers/gpu/drm/nouveau/core/core/event.c new file mode 100644 index 00000000000..6d01e0f0fc8 --- /dev/null +++ b/drivers/gpu/drm/nouveau/core/core/event.c @@ -0,0 +1,106 @@ +/* + * Copyright 2013 Red Hat Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + */ + +#include +#include + +static void +nouveau_event_put_locked(struct nouveau_event *event, int index, + struct nouveau_eventh *handler) +{ + if (!--event->index[index].refs) + event->disable(event, index); + list_del(&handler->head); +} + +void +nouveau_event_put(struct nouveau_event *event, int index, + struct nouveau_eventh *handler) +{ + unsigned long flags; + + spin_lock_irqsave(&event->lock, flags); + if (index < event->index_nr) + nouveau_event_put_locked(event, index, handler); + spin_unlock_irqrestore(&event->lock, flags); +} + +void +nouveau_event_get(struct nouveau_event *event, int index, + struct nouveau_eventh *handler) +{ + unsigned long flags; + + spin_lock_irqsave(&event->lock, flags); + if (index < event->index_nr) { + list_add(&handler->head, &event->index[index].list); + if (!event->index[index].refs++) + event->enable(event, index); + } + spin_unlock_irqrestore(&event->lock, flags); +} + +void +nouveau_event_trigger(struct nouveau_event *event, int index) +{ + struct nouveau_eventh *handler, *temp; + unsigned long flags; + + if (index >= event->index_nr) + return; + + spin_lock_irqsave(&event->lock, flags); + list_for_each_entry_safe(handler, temp, &event->index[index].list, head) { + if (handler->func(handler, index) == NVKM_EVENT_DROP) { + nouveau_event_put_locked(event, index, handler); + } + } + spin_unlock_irqrestore(&event->lock, flags); +} + +void +nouveau_event_destroy(struct nouveau_event **pevent) +{ + struct nouveau_event *event = *pevent; + if (event) { + kfree(event); + *pevent = NULL; + } +} + +int +nouveau_event_create(int index_nr, struct nouveau_event **pevent) +{ + struct nouveau_event *event; + int i; + + event = *pevent = kzalloc(sizeof(*event) + index_nr * + sizeof(event->index[0]), GFP_KERNEL); + if (!event) + return -ENOMEM; + + spin_lock_init(&event->lock); + for (i = 0; i < index_nr; i++) + INIT_LIST_HEAD(&event->index[i].list); + event->index_nr = index_nr; + return 0; +} diff --git a/drivers/gpu/drm/nouveau/core/include/core/event.h b/drivers/gpu/drm/nouveau/core/include/core/event.h new file mode 100644 index 00000000000..9e094408f14 --- /dev/null +++ b/drivers/gpu/drm/nouveau/core/include/core/event.h @@ -0,0 +1,36 @@ +#ifndef __NVKM_EVENT_H__ +#define __NVKM_EVENT_H__ + +/* return codes from event handlers */ +#define NVKM_EVENT_DROP 0 +#define NVKM_EVENT_KEEP 1 + +struct nouveau_eventh { + struct list_head head; + int (*func)(struct nouveau_eventh *, int index); +}; + +struct nouveau_event { + spinlock_t lock; + + void *priv; + void (*enable)(struct nouveau_event *, int index); + void (*disable)(struct nouveau_event *, int index); + + int index_nr; + struct { + struct list_head list; + int refs; + } index[]; +}; + +int nouveau_event_create(int index_nr, struct nouveau_event **); +void nouveau_event_destroy(struct nouveau_event **); +void nouveau_event_trigger(struct nouveau_event *, int index); + +void nouveau_event_get(struct nouveau_event *, int index, + struct nouveau_eventh *); +void nouveau_event_put(struct nouveau_event *, int index, + struct nouveau_eventh *); + +#endif