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->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_subdev_type type, int inst)
  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->type == type && info->inst == inst && info->intr >= 0)
  86                                 return BIT(info->intr);
  87                 }
  88         }
  89
  90         return 0;
  91 }
  92
  93 int
  94 nvkm_top_fault_id(struct nvkm_device *device, enum nvkm_devidx devidx)
  95 {
  96         struct nvkm_top *top = device->top;
  97         struct nvkm_top_device *info;
  98
  99         list_for_each_entry(info, &top->device, head) {
 100                 if (info->index == devidx && info->fault >= 0)
 101                         return info->fault;
 102         }
 103
 104         return -ENOENT;
 105 }
 106
 107 enum nvkm_devidx
 108 nvkm_top_fault(struct nvkm_device *device, int fault)
 109 {
 110         struct nvkm_top *top = device->top;
 111         struct nvkm_top_device *info;
 112
 113         list_for_each_entry(info, &top->device, head) {
 114                 if (info->fault == fault)
 115                         return info->index;
 116         }
 117
 118         return NVKM_SUBDEV_NR;
 119 }
 120
 121 enum nvkm_devidx
 122 nvkm_top_engine(struct nvkm_device *device, int index, int *runl, int *engn)
 123 {
 124         struct nvkm_top *top = device->top;
 125         struct nvkm_top_device *info;
 126         int n = 0;
 127
 128         list_for_each_entry(info, &top->device, head) {
 129                 if (info->engine >= 0 && info->runlist >= 0 && n++ == index) {
 130                         *runl = info->runlist;
 131                         *engn = info->engine;
 132                         return info->index;
 133                 }
 134         }
 135
 136         return -ENODEV;
 137 }
 138
 139 static int
 140 nvkm_top_oneinit(struct nvkm_subdev *subdev)
 141 {
 142         struct nvkm_top *top = nvkm_top(subdev);
 143         return top->func->oneinit(top);
 144 }
 145
 146 static void *
 147 nvkm_top_dtor(struct nvkm_subdev *subdev)
 148 {
 149         struct nvkm_top *top = nvkm_top(subdev);
 150         struct nvkm_top_device *info, *temp;
 151
 152         list_for_each_entry_safe(info, temp, &top->device, head) {
 153                 list_del(&info->head);
 154                 kfree(info);
 155         }
 156
 157         return top;
 158 }
 159
 160 static const struct nvkm_subdev_func
 161 nvkm_top = {
 162         .dtor = nvkm_top_dtor,
 163         .oneinit = nvkm_top_oneinit,
 164 };
 165
 166 int
 167 nvkm_top_new_(const struct nvkm_top_func *func, struct nvkm_device *device,
 168               enum nvkm_subdev_type type, int inst, struct nvkm_top **ptop)
 169 {
 170         struct nvkm_top *top;
 171         if (!(top = *ptop = kzalloc(sizeof(*top), GFP_KERNEL)))
 172                 return -ENOMEM;
 173         nvkm_subdev_ctor(&nvkm_top, device, type, inst, &top->subdev);
 174         top->func = func;
 175         INIT_LIST_HEAD(&top->device);
 176         return 0;
 177 }