1 /* 2 * Copyright 2016 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 * Authors: Ben Skeggs <bskeggs@redhat.com> 23 */ 24 #include "priv.h" 25 26 struct nvkm_top_device * 27 nvkm_top_device_new(struct nvkm_top *top) 28 { 29 struct nvkm_top_device *info = kmalloc(sizeof(*info), GFP_KERNEL); 30 if (info) { 31 info->index = NVKM_SUBDEV_NR; 32 info->addr = 0; 33 info->fault = -1; 34 info->engine = -1; 35 info->runlist = -1; 36 info->reset = -1; 37 info->intr = -1; 38 list_add_tail(&info->head, &top->device); 39 } 40 return info; 41 } 42 43 u32 44 nvkm_top_reset(struct nvkm_top *top, enum nvkm_devidx index) 45 { 46 struct nvkm_top_device *info; 47 48 if (top) { 49 list_for_each_entry(info, &top->device, head) { 50 if (info->index == index && info->reset >= 0) 51 return BIT(info->reset); 52 } 53 } 54 55 return 0; 56 } 57 58 u32 59 nvkm_top_intr(struct nvkm_top *top, u32 intr, u64 *psubdevs) 60 { 61 struct nvkm_top_device *info; 62 u64 subdevs = 0; 63 u32 handled = 0; 64 65 if (top) { 66 list_for_each_entry(info, &top->device, head) { 67 if (info->index != NVKM_SUBDEV_NR && info->intr >= 0) { 68 if (intr & BIT(info->intr)) { 69 subdevs |= BIT_ULL(info->index); 70 handled |= BIT(info->intr); 71 } 72 } 73 } 74 } 75 76 *psubdevs = subdevs; 77 return intr & ~handled; 78 } 79 80 enum nvkm_devidx 81 nvkm_top_fault(struct nvkm_top *top, int fault) 82 { 83 struct nvkm_top_device *info; 84 85 list_for_each_entry(info, &top->device, head) { 86 if (info->fault == fault) 87 return info->index; 88 } 89 90 return NVKM_SUBDEV_NR; 91 } 92 93 enum nvkm_devidx 94 nvkm_top_engine(struct nvkm_top *top, int index, int *runl, int *engn) 95 { 96 struct nvkm_top_device *info; 97 int n = 0; 98 99 list_for_each_entry(info, &top->device, head) { 100 if (info->engine >= 0 && info->runlist >= 0 && n++ == index) { 101 *runl = info->runlist; 102 *engn = info->engine; 103 return info->index; 104 } 105 } 106 107 return -ENODEV; 108 } 109 110 static int 111 nvkm_top_oneinit(struct nvkm_subdev *subdev) 112 { 113 struct nvkm_top *top = nvkm_top(subdev); 114 return top->func->oneinit(top); 115 } 116 117 static void * 118 nvkm_top_dtor(struct nvkm_subdev *subdev) 119 { 120 struct nvkm_top *top = nvkm_top(subdev); 121 struct nvkm_top_device *info, *temp; 122 123 list_for_each_entry_safe(info, temp, &top->device, head) { 124 list_del(&info->head); 125 kfree(info); 126 } 127 128 return top; 129 } 130 131 static const struct nvkm_subdev_func 132 nvkm_top = { 133 .dtor = nvkm_top_dtor, 134 .oneinit = nvkm_top_oneinit, 135 }; 136 137 int 138 nvkm_top_new_(const struct nvkm_top_func *func, struct nvkm_device *device, 139 int index, struct nvkm_top **ptop) 140 { 141 struct nvkm_top *top; 142 if (!(top = *ptop = kzalloc(sizeof(*top), GFP_KERNEL))) 143 return -ENOMEM; 144 nvkm_subdev_ctor(&nvkm_top, device, index, &top->subdev); 145 top->func = func; 146 INIT_LIST_HEAD(&top->device); 147 return 0; 148 } 149