/* * 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(array3_size(index_nr, types_nr, sizeof(*event->refs)), 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; }