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/*
* Copyright 2021 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.
*/
#define nvkm_uevent(p) container_of((p), struct nvkm_uevent, object)
#include <core/event.h>
#include <core/client.h>
#include <nvif/if000e.h>
struct nvkm_uevent {
struct nvkm_object object;
struct nvkm_object *parent;
nvkm_uevent_func func;
bool wait;
struct nvkm_event_ntfy ntfy;
atomic_t allowed;
};
static int
nvkm_uevent_mthd_block(struct nvkm_uevent *uevent, union nvif_event_block_args *args, u32 argc)
{
if (argc != sizeof(args->vn))
return -ENOSYS;
nvkm_event_ntfy_block(&uevent->ntfy);
atomic_set(&uevent->allowed, 0);
return 0;
}
static int
nvkm_uevent_mthd_allow(struct nvkm_uevent *uevent, union nvif_event_allow_args *args, u32 argc)
{
if (argc != sizeof(args->vn))
return -ENOSYS;
nvkm_event_ntfy_allow(&uevent->ntfy);
atomic_set(&uevent->allowed, 1);
return 0;
}
static int
nvkm_uevent_mthd(struct nvkm_object *object, u32 mthd, void *argv, u32 argc)
{
struct nvkm_uevent *uevent = nvkm_uevent(object);
switch (mthd) {
case NVIF_EVENT_V0_ALLOW: return nvkm_uevent_mthd_allow(uevent, argv, argc);
case NVIF_EVENT_V0_BLOCK: return nvkm_uevent_mthd_block(uevent, argv, argc);
default:
break;
}
return -EINVAL;
}
static int
nvkm_uevent_fini(struct nvkm_object *object, bool suspend)
{
struct nvkm_uevent *uevent = nvkm_uevent(object);
nvkm_event_ntfy_block(&uevent->ntfy);
return 0;
}
static int
nvkm_uevent_init(struct nvkm_object *object)
{
struct nvkm_uevent *uevent = nvkm_uevent(object);
if (atomic_read(&uevent->allowed))
nvkm_event_ntfy_allow(&uevent->ntfy);
return 0;
}
static void *
nvkm_uevent_dtor(struct nvkm_object *object)
{
struct nvkm_uevent *uevent = nvkm_uevent(object);
nvkm_event_ntfy_del(&uevent->ntfy);
return uevent;
}
static const struct nvkm_object_func
nvkm_uevent = {
.dtor = nvkm_uevent_dtor,
.init = nvkm_uevent_init,
.fini = nvkm_uevent_fini,
.mthd = nvkm_uevent_mthd,
};
static int
nvkm_uevent_ntfy(struct nvkm_event_ntfy *ntfy, u32 bits)
{
struct nvkm_uevent *uevent = container_of(ntfy, typeof(*uevent), ntfy);
struct nvkm_client *client = uevent->object.client;
if (uevent->func)
return uevent->func(uevent->parent, uevent->object.token, bits);
return client->event(uevent->object.token, NULL, 0);
}
int
nvkm_uevent_add(struct nvkm_uevent *uevent, struct nvkm_event *event, int id, u32 bits,
nvkm_uevent_func func)
{
if (WARN_ON(uevent->func))
return -EBUSY;
nvkm_event_ntfy_add(event, id, bits, uevent->wait, nvkm_uevent_ntfy, &uevent->ntfy);
uevent->func = func;
return 0;
}
int
nvkm_uevent_new(const struct nvkm_oclass *oclass, void *argv, u32 argc,
struct nvkm_object **pobject)
{
struct nvkm_object *parent = oclass->parent;
struct nvkm_uevent *uevent;
union nvif_event_args *args = argv;
if (argc < sizeof(args->v0) || args->v0.version != 0)
return -ENOSYS;
if (!(uevent = kzalloc(sizeof(*uevent), GFP_KERNEL)))
return -ENOMEM;
*pobject = &uevent->object;
nvkm_object_ctor(&nvkm_uevent, oclass, &uevent->object);
uevent->parent = parent;
uevent->func = NULL;
uevent->wait = args->v0.wait;
uevent->ntfy.event = NULL;
return parent->func->uevent(parent, &args->v0.data, argc - sizeof(args->v0), uevent);
}
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