1 /* 2 * Copyright 2013-2014 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 #include <core/event.h> 23 #include <core/notify.h> 24 25 void 26 nvkm_event_put(struct nvkm_event *event, u32 types, int index) 27 { 28 assert_spin_locked(&event->refs_lock); 29 while (types) { 30 int type = __ffs(types); types &= ~(1 << type); 31 if (--event->refs[index * event->types_nr + type] == 0) { 32 if (event->func->fini) 33 event->func->fini(event, 1 << type, index); 34 } 35 } 36 } 37 38 void 39 nvkm_event_get(struct nvkm_event *event, u32 types, int index) 40 { 41 assert_spin_locked(&event->refs_lock); 42 while (types) { 43 int type = __ffs(types); types &= ~(1 << type); 44 if (++event->refs[index * event->types_nr + type] == 1) { 45 if (event->func->init) 46 event->func->init(event, 1 << type, index); 47 } 48 } 49 } 50 51 void 52 nvkm_event_send(struct nvkm_event *event, u32 types, int index, 53 void *data, u32 size) 54 { 55 struct nvkm_notify *notify; 56 unsigned long flags; 57 58 if (!event->refs || WARN_ON(index >= event->index_nr)) 59 return; 60 61 spin_lock_irqsave(&event->list_lock, flags); 62 list_for_each_entry(notify, &event->list, head) { 63 if (notify->index == index && (notify->types & types)) { 64 if (event->func->send) { 65 event->func->send(data, size, notify); 66 continue; 67 } 68 nvkm_notify_send(notify, data, size); 69 } 70 } 71 spin_unlock_irqrestore(&event->list_lock, flags); 72 } 73 74 void 75 nvkm_event_fini(struct nvkm_event *event) 76 { 77 if (event->refs) { 78 kfree(event->refs); 79 event->refs = NULL; 80 } 81 } 82 83 int 84 nvkm_event_init(const struct nvkm_event_func *func, int types_nr, int index_nr, 85 struct nvkm_event *event) 86 { 87 event->refs = kzalloc(array3_size(index_nr, types_nr, 88 sizeof(*event->refs)), 89 GFP_KERNEL); 90 if (!event->refs) 91 return -ENOMEM; 92 93 event->func = func; 94 event->types_nr = types_nr; 95 event->index_nr = index_nr; 96 spin_lock_init(&event->refs_lock); 97 spin_lock_init(&event->list_lock); 98 INIT_LIST_HEAD(&event->list); 99 return 0; 100 } 101