diff options
Diffstat (limited to 'kernel/drivers/gpu/drm/nouveau/nvkm/core/event.c')
-rw-r--r-- | kernel/drivers/gpu/drm/nouveau/nvkm/core/event.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/kernel/drivers/gpu/drm/nouveau/nvkm/core/event.c b/kernel/drivers/gpu/drm/nouveau/nvkm/core/event.c new file mode 100644 index 000000000..4e8d3fa04 --- /dev/null +++ b/kernel/drivers/gpu/drm/nouveau/nvkm/core/event.c @@ -0,0 +1,99 @@ +/* + * Copyright 2013-2014 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 <core/event.h> +#include <core/notify.h> + +void +nvkm_event_put(struct nvkm_event *event, u32 types, int index) +{ + assert_spin_locked(&event->refs_lock); + while (types) { + int type = __ffs(types); types &= ~(1 << type); + if (--event->refs[index * event->types_nr + type] == 0) { + if (event->func->fini) + event->func->fini(event, 1 << type, index); + } + } +} + +void +nvkm_event_get(struct nvkm_event *event, u32 types, int index) +{ + assert_spin_locked(&event->refs_lock); + while (types) { + int type = __ffs(types); types &= ~(1 << type); + if (++event->refs[index * event->types_nr + type] == 1) { + if (event->func->init) + event->func->init(event, 1 << type, index); + } + } +} + +void +nvkm_event_send(struct nvkm_event *event, u32 types, int index, + void *data, u32 size) +{ + struct nvkm_notify *notify; + unsigned long flags; + + if (!event->refs || WARN_ON(index >= event->index_nr)) + return; + + spin_lock_irqsave(&event->list_lock, flags); + list_for_each_entry(notify, &event->list, head) { + if (notify->index == index && (notify->types & types)) { + if (event->func->send) { + event->func->send(data, size, notify); + continue; + } + nvkm_notify_send(notify, data, size); + } + } + spin_unlock_irqrestore(&event->list_lock, flags); +} + +void +nvkm_event_fini(struct nvkm_event *event) +{ + if (event->refs) { + kfree(event->refs); + event->refs = NULL; + } +} + +int +nvkm_event_init(const struct nvkm_event_func *func, int types_nr, int index_nr, + struct nvkm_event *event) +{ + event->refs = kzalloc(sizeof(*event->refs) * index_nr * types_nr, + GFP_KERNEL); + if (!event->refs) + return -ENOMEM; + + event->func = func; + event->types_nr = types_nr; + event->index_nr = index_nr; + spin_lock_init(&event->refs_lock); + spin_lock_init(&event->list_lock); + INIT_LIST_HEAD(&event->list); + return 0; +} |