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->type = NVKM_SUBDEV_NR; 32 info->inst = -1; 33 info->index = NVKM_SUBDEV_NR; 34 info->addr = 0; 35 info->fault = -1; 36 info->engine = -1; 37 info->runlist = -1; 38 info->reset = -1; 39 info->intr = -1; 40 list_add_tail(&info->head, &top->device); 41 } 42 return info; 43 } 44 45 u32 46 nvkm_top_addr(struct nvkm_device *device, enum nvkm_devidx index) 47 { 48 struct nvkm_top *top = device->top; 49 struct nvkm_top_device *info; 50 51 if (top) { 52 list_for_each_entry(info, &top->device, head) { 53 if (info->index == index) 54 return info->addr; 55 } 56 } 57 58 return 0; 59 } 60 61 u32 62 nvkm_top_reset(struct nvkm_device *device, enum nvkm_subdev_type type, int inst) 63 { 64 struct nvkm_top *top = device->top; 65 struct nvkm_top_device *info; 66 67 if (top) { 68 list_for_each_entry(info, &top->device, head) { 69 if (info->type == type && info->inst == inst && info->reset >= 0) 70 return BIT(info->reset); 71 } 72 } 73 74 return 0; 75 } 76 77 u32 78 nvkm_top_intr_mask(struct nvkm_device *device, enum nvkm_devidx devidx) 79 { 80 struct nvkm_top *top = device->top; 81 struct nvkm_top_device *info; 82 83 if (top) { 84 list_for_each_entry(info, &top->device, head) { 85 if (info->index == devidx && info->intr >= 0) 86 return BIT(info->intr); 87 } 88 } 89 90 return 0; 91 } 92 93 u32 94 nvkm_top_intr(struct nvkm_device *device, u32 intr, u64 *psubdevs) 95 { 96 struct nvkm_top *top = device->top; 97 struct nvkm_top_device *info; 98 u64 subdevs = 0; 99 u32 handled = 0; 100 101 if (top) { 102 list_for_each_entry(info, &top->device, head) { 103 if (info->index != NVKM_SUBDEV_NR && info->intr >= 0) { 104 if (intr & BIT(info->intr)) { 105 subdevs |= BIT_ULL(info->index); 106 handled |= BIT(info->intr); 107 } 108 } 109 } 110 } 111 112 *psubdevs = subdevs; 113 return intr & ~handled; 114 } 115 116 int 117 nvkm_top_fault_id(struct nvkm_device *device, enum nvkm_devidx devidx) 118 { 119 struct nvkm_top *top = device->top; 120 struct nvkm_top_device *info; 121 122 list_for_each_entry(info, &top->device, head) { 123 if (info->index == devidx && info->fault >= 0) 124 return info->fault; 125 } 126 127 return -ENOENT; 128 } 129 130 enum nvkm_devidx 131 nvkm_top_fault(struct nvkm_device *device, int fault) 132 { 133 struct nvkm_top *top = device->top; 134 struct nvkm_top_device *info; 135 136 list_for_each_entry(info, &top->device, head) { 137 if (info->fault == fault) 138 return info->index; 139 } 140 141 return NVKM_SUBDEV_NR; 142 } 143 144 enum nvkm_devidx 145 nvkm_top_engine(struct nvkm_device *device, int index, int *runl, int *engn) 146 { 147 struct nvkm_top *top = device->top; 148 struct nvkm_top_device *info; 149 int n = 0; 150 151 list_for_each_entry(info, &top->device, head) { 152 if (info->engine >= 0 && info->runlist >= 0 && n++ == index) { 153 *runl = info->runlist; 154 *engn = info->engine; 155 return info->index; 156 } 157 } 158 159 return -ENODEV; 160 } 161 162 static int 163 nvkm_top_oneinit(struct nvkm_subdev *subdev) 164 { 165 struct nvkm_top *top = nvkm_top(subdev); 166 return top->func->oneinit(top); 167 } 168 169 static void * 170 nvkm_top_dtor(struct nvkm_subdev *subdev) 171 { 172 struct nvkm_top *top = nvkm_top(subdev); 173 struct nvkm_top_device *info, *temp; 174 175 list_for_each_entry_safe(info, temp, &top->device, head) { 176 list_del(&info->head); 177 kfree(info); 178 } 179 180 return top; 181 } 182 183 static const struct nvkm_subdev_func 184 nvkm_top = { 185 .dtor = nvkm_top_dtor, 186 .oneinit = nvkm_top_oneinit, 187 }; 188 189 int 190 nvkm_top_new_(const struct nvkm_top_func *func, struct nvkm_device *device, 191 int index, struct nvkm_top **ptop) 192 { 193 struct nvkm_top *top; 194 if (!(top = *ptop = kzalloc(sizeof(*top), GFP_KERNEL))) 195 return -ENOMEM; 196 nvkm_subdev_ctor(&nvkm_top, device, index, &top->subdev); 197 top->func = func; 198 INIT_LIST_HEAD(&top->device); 199 return 0; 200 } 201