drivers/gpu/drm/nouveau/nvkm/subdev/top/base.c

   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 }