1/* 2 * Copyright 2021 Red Hat Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * 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 OR 20 * 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 int 39nvkm_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 int 50nvkm_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 int 61nvkm_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 int 76nvkm_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 int 85nvkm_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_func 105nvkm_uevent = { 106 .dtor = nvkm_uevent_dtor, 107 .init = nvkm_uevent_init, 108 .fini = nvkm_uevent_fini, 109 .mthd = nvkm_uevent_mthd, 110}; 111 112static int 113nvkm_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.token, bits); 120 121 return client->event(uevent->object.token, NULL, 0); 122} 123 124int 125nvkm_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 136int 137nvkm_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