Commit 51fa0253 authored by Ben Skeggs's avatar Ben Skeggs

drm/nouveau/core: basic event interface between core and drm

Signed-off-by: default avatarBen Skeggs <bskeggs@redhat.com>
parent 32256c87
......@@ -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
......
/*
* 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)
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;
}
#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
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