| /* |
| * 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 <core/os.h> |
| #include <core/event.h> |
| |
| static void |
| nouveau_event_put_locked(struct nouveau_event *event, int index, |
| struct nouveau_eventh *handler) |
| { |
| if (!--event->index[index].refs) { |
| if (event->disable) |
| 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++) { |
| if (event->enable) |
| 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; |
| } |