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1/*2 * Copyright 2021 Red Hat Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR20 * OTHER DEALINGS IN THE SOFTWARE.21 */22#define nvkm_uevent(p) container_of((p), struct nvkm_uevent, object)23#include <core/event.h>24#include <core/client.h>25 26#include <nvif/if000e.h>27 28struct nvkm_uevent {29 struct nvkm_object object;30 struct nvkm_object *parent;31 nvkm_uevent_func func;32 bool wait;33 34 struct nvkm_event_ntfy ntfy;35 atomic_t allowed;36};37 38static int39nvkm_uevent_mthd_block(struct nvkm_uevent *uevent, union nvif_event_block_args *args, u32 argc)40{41 if (argc != sizeof(args->vn))42 return -ENOSYS;43 44 nvkm_event_ntfy_block(&uevent->ntfy);45 atomic_set(&uevent->allowed, 0);46 return 0;47}48 49static int50nvkm_uevent_mthd_allow(struct nvkm_uevent *uevent, union nvif_event_allow_args *args, u32 argc)51{52 if (argc != sizeof(args->vn))53 return -ENOSYS;54 55 nvkm_event_ntfy_allow(&uevent->ntfy);56 atomic_set(&uevent->allowed, 1);57 return 0;58}59 60static int61nvkm_uevent_mthd(struct nvkm_object *object, u32 mthd, void *argv, u32 argc)62{63 struct nvkm_uevent *uevent = nvkm_uevent(object);64 65 switch (mthd) {66 case NVIF_EVENT_V0_ALLOW: return nvkm_uevent_mthd_allow(uevent, argv, argc);67 case NVIF_EVENT_V0_BLOCK: return nvkm_uevent_mthd_block(uevent, argv, argc);68 default:69 break;70 }71 72 return -EINVAL;73}74 75static int76nvkm_uevent_fini(struct nvkm_object *object, bool suspend)77{78 struct nvkm_uevent *uevent = nvkm_uevent(object);79 80 nvkm_event_ntfy_block(&uevent->ntfy);81 return 0;82}83 84static int85nvkm_uevent_init(struct nvkm_object *object)86{87 struct nvkm_uevent *uevent = nvkm_uevent(object);88 89 if (atomic_read(&uevent->allowed))90 nvkm_event_ntfy_allow(&uevent->ntfy);91 92 return 0;93}94 95static void *96nvkm_uevent_dtor(struct nvkm_object *object)97{98 struct nvkm_uevent *uevent = nvkm_uevent(object);99 100 nvkm_event_ntfy_del(&uevent->ntfy);101 return uevent;102}103 104static const struct nvkm_object_func105nvkm_uevent = {106 .dtor = nvkm_uevent_dtor,107 .init = nvkm_uevent_init,108 .fini = nvkm_uevent_fini,109 .mthd = nvkm_uevent_mthd,110};111 112static int113nvkm_uevent_ntfy(struct nvkm_event_ntfy *ntfy, u32 bits)114{115 struct nvkm_uevent *uevent = container_of(ntfy, typeof(*uevent), ntfy);116 struct nvkm_client *client = uevent->object.client;117 118 if (uevent->func)119 return uevent->func(uevent->parent, uevent->object.object, bits);120 121 return client->event(uevent->object.object, NULL, 0);122}123 124int125nvkm_uevent_add(struct nvkm_uevent *uevent, struct nvkm_event *event, int id, u32 bits,126 nvkm_uevent_func func)127{128 if (WARN_ON(uevent->func))129 return -EBUSY;130 131 nvkm_event_ntfy_add(event, id, bits, uevent->wait, nvkm_uevent_ntfy, &uevent->ntfy);132 uevent->func = func;133 return 0;134}135 136int137nvkm_uevent_new(const struct nvkm_oclass *oclass, void *argv, u32 argc,138 struct nvkm_object **pobject)139{140 struct nvkm_object *parent = oclass->parent;141 struct nvkm_uevent *uevent;142 union nvif_event_args *args = argv;143 144 if (argc < sizeof(args->v0) || args->v0.version != 0)145 return -ENOSYS;146 147 if (!(uevent = kzalloc(sizeof(*uevent), GFP_KERNEL)))148 return -ENOMEM;149 *pobject = &uevent->object;150 151 nvkm_object_ctor(&nvkm_uevent, oclass, &uevent->object);152 uevent->parent = parent;153 uevent->func = NULL;154 uevent->wait = args->v0.wait;155 uevent->ntfy.event = NULL;156 return parent->func->uevent(parent, &args->v0.data, argc - sizeof(args->v0), uevent);157}158