130 lines
3.3 KiB
C
130 lines
3.3 KiB
C
/*
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* Copyright 2021 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#define nvkm_uoutp(p) container_of((p), struct nvkm_outp, object)
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#include "outp.h"
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#include "ior.h"
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#include <nvif/if0012.h>
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static int
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nvkm_uoutp_mthd_load_detect(struct nvkm_outp *outp, void *argv, u32 argc)
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{
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union nvif_outp_load_detect_args *args = argv;
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int ret;
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if (argc != sizeof(args->v0) || args->v0.version != 0)
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return -ENOSYS;
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ret = nvkm_outp_acquire(outp, NVKM_OUTP_PRIV, false);
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if (ret == 0) {
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if (outp->ior->func->sense) {
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ret = outp->ior->func->sense(outp->ior, args->v0.data);
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args->v0.load = ret < 0 ? 0 : ret;
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} else {
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ret = -EINVAL;
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}
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nvkm_outp_release(outp, NVKM_OUTP_PRIV);
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}
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return ret;
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}
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static int
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nvkm_uoutp_mthd_noacquire(struct nvkm_outp *outp, u32 mthd, void *argv, u32 argc)
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{
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switch (mthd) {
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case NVIF_OUTP_V0_LOAD_DETECT: return nvkm_uoutp_mthd_load_detect(outp, argv, argc);
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default:
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break;
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}
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return 1;
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}
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static int
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nvkm_uoutp_mthd(struct nvkm_object *object, u32 mthd, void *argv, u32 argc)
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{
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struct nvkm_outp *outp = nvkm_uoutp(object);
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struct nvkm_disp *disp = outp->disp;
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int ret;
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mutex_lock(&disp->super.mutex);
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ret = nvkm_uoutp_mthd_noacquire(outp, mthd, argv, argc);
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if (ret <= 0)
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goto done;
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done:
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mutex_unlock(&disp->super.mutex);
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return ret;
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}
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static void *
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nvkm_uoutp_dtor(struct nvkm_object *object)
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{
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struct nvkm_outp *outp = nvkm_uoutp(object);
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struct nvkm_disp *disp = outp->disp;
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spin_lock(&disp->client.lock);
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outp->object.func = NULL;
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spin_unlock(&disp->client.lock);
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return NULL;
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}
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static const struct nvkm_object_func
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nvkm_uoutp = {
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.dtor = nvkm_uoutp_dtor,
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.mthd = nvkm_uoutp_mthd,
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};
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int
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nvkm_uoutp_new(const struct nvkm_oclass *oclass, void *argv, u32 argc, struct nvkm_object **pobject)
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{
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struct nvkm_disp *disp = nvkm_udisp(oclass->parent);
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struct nvkm_outp *outt, *outp = NULL;
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union nvif_outp_args *args = argv;
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int ret;
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if (argc != sizeof(args->v0) || args->v0.version != 0)
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return -ENOSYS;
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list_for_each_entry(outt, &disp->outps, head) {
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if (outt->index == args->v0.id) {
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outp = outt;
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break;
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}
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}
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if (!outp)
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return -EINVAL;
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ret = -EBUSY;
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spin_lock(&disp->client.lock);
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if (!outp->object.func) {
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nvkm_object_ctor(&nvkm_uoutp, oclass, &outp->object);
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*pobject = &outp->object;
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ret = 0;
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}
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spin_unlock(&disp->client.lock);
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return ret;
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}
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