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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 | /* * 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); } |