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_addr(struct nvkm_device *device, enum nvkm_devidx index) 45 { 46 struct nvkm_top *top = device->top; 47 struct nvkm_top_device *info; 48 49 if (top) { 50 list_for_each_entry(info, &top->device, head) { 51 if (info->index == index) 52 return info->addr; 53 } 54 } 55 56 return 0; 57 } 58 59 u32 60 nvkm_top_reset(struct nvkm_device *device, enum nvkm_devidx index) 61 { 62 struct nvkm_top *top = device->top; 63 struct nvkm_top_device *info; 64 65 if (top) { 66 list_for_each_entry(info, &top->device, head) { 67 if (info->index == index && info->reset >= 0) 68 return BIT(info->reset); 69 } 70 } 71 72 return 0; 73 } 74 75 u32 76 nvkm_top_intr_mask(struct nvkm_device *device, enum nvkm_devidx devidx) 77 { 78 struct nvkm_top *top = device->top; 79 struct nvkm_top_device *info; 80 81 if (top) { 82 list_for_each_entry(info, &top->device, head) { 83 if (info->index == devidx && info->intr >= 0) 84 return BIT(info->intr); 85 } 86 } 87 88 return 0; 89 } 90 91 u32 92 nvkm_top_intr(struct nvkm_device *device, u32 intr, u64 *psubdevs) 93 { 94 struct nvkm_top *top = device->top; 95 struct nvkm_top_device *info; 96 u64 subdevs = 0; 97 u32 handled = 0; 98 99 if (top) { 100 list_for_each_entry(info, &top->device, head) { 101 if (info->index != NVKM_SUBDEV_NR && info->intr >= 0) { 102 if (intr & BIT(info->intr)) { 103 subdevs |= BIT_ULL(info->index); 104 handled |= BIT(info->intr); 105 } 106 } 107 } 108 } 109 110 *psubdevs = subdevs; 111 return intr & ~handled; 112 } 113 114 int 115 nvkm_top_fault_id(struct nvkm_device *device, enum nvkm_devidx devidx) 116 { 117 struct nvkm_top *top = device->top; 118 struct nvkm_top_device *info; 119 120 list_for_each_entry(info, &top->device, head) { 121 if (info->index == devidx && info->fault >= 0) 122 return info->fault; 123 } 124 125 return -ENOENT; 126 } 127 128 enum nvkm_devidx 129 nvkm_top_fault(struct nvkm_device *device, int fault) 130 { 131 struct nvkm_top *top = device->top; 132 struct nvkm_top_device *info; 133 134 list_for_each_entry(info, &top->device, head) { 135 if (info->fault == fault) 136 return info->index; 137 } 138 139 return NVKM_SUBDEV_NR; 140 } 141 142 enum nvkm_devidx 143 nvkm_top_engine(struct nvkm_device *device, int index, int *runl, int *engn) 144 { 145 struct nvkm_top *top = device->top; 146 struct nvkm_top_device *info; 147 int n = 0; 148 149 list_for_each_entry(info, &top->device, head) { 150 if (info->engine >= 0 && info->runlist >= 0 && n++ == index) { 151 *runl = info->runlist; 152 *engn = info->engine; 153 return info->index; 154 } 155 } 156 157 return -ENODEV; 158 } 159 160 static int 161 nvkm_top_oneinit(struct nvkm_subdev *subdev) 162 { 163 struct nvkm_top *top = nvkm_top(subdev); 164 return top->func->oneinit(top); 165 } 166 167 static void * 168 nvkm_top_dtor(struct nvkm_subdev *subdev) 169 { 170 struct nvkm_top *top = nvkm_top(subdev); 171 struct nvkm_top_device *info, *temp; 172 173 list_for_each_entry_safe(info, temp, &top->device, head) { 174 list_del(&info->head); 175 kfree(info); 176 } 177 178 return top; 179 } 180 181 static const struct nvkm_subdev_func 182 nvkm_top = { 183 .dtor = nvkm_top_dtor, 184 .oneinit = nvkm_top_oneinit, 185 }; 186 187 int 188 nvkm_top_new_(const struct nvkm_top_func *func, struct nvkm_device *device, 189 int index, struct nvkm_top **ptop) 190 { 191 struct nvkm_top *top; 192 if (!(top = *ptop = kzalloc(sizeof(*top), GFP_KERNEL))) 193 return -ENOMEM; 194 nvkm_subdev_ctor(&nvkm_top, device, index, &top->subdev); 195 top->func = func; 196 INIT_LIST_HEAD(&top->device); 197 return 0; 198 } 199