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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_uoutp(p) container_of((p), struct nvkm_outp, object)
#include "outp.h"
#include "ior.h"
#include <nvif/if0012.h>
static int
nvkm_uoutp_mthd_load_detect(struct nvkm_outp *outp, void *argv, u32 argc)
{
union nvif_outp_load_detect_args *args = argv;
int ret;
if (argc != sizeof(args->v0) || args->v0.version != 0)
return -ENOSYS;
ret = nvkm_outp_acquire(outp, NVKM_OUTP_PRIV, false);
if (ret == 0) {
if (outp->ior->func->sense) {
ret = outp->ior->func->sense(outp->ior, args->v0.data);
args->v0.load = ret < 0 ? 0 : ret;
} else {
ret = -EINVAL;
}
nvkm_outp_release(outp, NVKM_OUTP_PRIV);
}
return ret;
}
static int
nvkm_uoutp_mthd_noacquire(struct nvkm_outp *outp, u32 mthd, void *argv, u32 argc)
{
switch (mthd) {
case NVIF_OUTP_V0_LOAD_DETECT: return nvkm_uoutp_mthd_load_detect(outp, argv, argc);
default:
break;
}
return 1;
}
static int
nvkm_uoutp_mthd(struct nvkm_object *object, u32 mthd, void *argv, u32 argc)
{
struct nvkm_outp *outp = nvkm_uoutp(object);
struct nvkm_disp *disp = outp->disp;
int ret;
mutex_lock(&disp->super.mutex);
ret = nvkm_uoutp_mthd_noacquire(outp, mthd, argv, argc);
if (ret <= 0)
goto done;
done:
mutex_unlock(&disp->super.mutex);
return ret;
}
static void *
nvkm_uoutp_dtor(struct nvkm_object *object)
{
struct nvkm_outp *outp = nvkm_uoutp(object);
struct nvkm_disp *disp = outp->disp;
spin_lock(&disp->client.lock);
outp->object.func = NULL;
spin_unlock(&disp->client.lock);
return NULL;
}
static const struct nvkm_object_func
nvkm_uoutp = {
.dtor = nvkm_uoutp_dtor,
.mthd = nvkm_uoutp_mthd,
};
int
nvkm_uoutp_new(const struct nvkm_oclass *oclass, void *argv, u32 argc, struct nvkm_object **pobject)
{
struct nvkm_disp *disp = nvkm_udisp(oclass->parent);
struct nvkm_outp *outt, *outp = NULL;
union nvif_outp_args *args = argv;
int ret;
if (argc != sizeof(args->v0) || args->v0.version != 0)
return -ENOSYS;
list_for_each_entry(outt, &disp->outps, head) {
if (outt->index == args->v0.id) {
outp = outt;
break;
}
}
if (!outp)
return -EINVAL;
ret = -EBUSY;
spin_lock(&disp->client.lock);
if (!outp->object.func) {
nvkm_object_ctor(&nvkm_uoutp, oclass, &outp->object);
*pobject = &outp->object;
ret = 0;
}
spin_unlock(&disp->client.lock);
return ret;
}
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