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/*
* 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;
}
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