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_reset(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 && info->reset >= 0)
  52                                 return BIT(info->reset);
  53                 }
  54         }
  55
  56         return 0;
  57 }
  58
  59 u32
  60 nvkm_top_intr_mask(struct nvkm_device *device, enum nvkm_devidx devidx)
  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 == devidx && info->intr >= 0)
  68                                 return BIT(info->intr);
  69                 }
  70         }
  71
  72         return 0;
  73 }
  74
  75 u32
  76 nvkm_top_intr(struct nvkm_device *device, u32 intr, u64 *psubdevs)
  77 {
  78         struct nvkm_top *top = device->top;
  79         struct nvkm_top_device *info;
  80         u64 subdevs = 0;
  81         u32 handled = 0;
  82
  83         if (top) {
  84                 list_for_each_entry(info, &top->device, head) {
  85                         if (info->index != NVKM_SUBDEV_NR && info->intr >= 0) {
  86                                 if (intr & BIT(info->intr)) {
  87                                         subdevs |= BIT_ULL(info->index);
  88                                         handled |= BIT(info->intr);
  89                                 }
  90                         }
  91                 }
  92         }
  93
  94         *psubdevs = subdevs;
  95         return intr & ~handled;
  96 }
  97
  98 enum nvkm_devidx
  99 nvkm_top_fault(struct nvkm_device *device, int fault)
 100 {
 101         struct nvkm_top *top = device->top;
 102         struct nvkm_top_device *info;
 103
 104         list_for_each_entry(info, &top->device, head) {
 105                 if (info->fault == fault)
 106                         return info->index;
 107         }
 108
 109         return NVKM_SUBDEV_NR;
 110 }
 111
 112 enum nvkm_devidx
 113 nvkm_top_engine(struct nvkm_device *device, int index, int *runl, int *engn)
 114 {
 115         struct nvkm_top *top = device->top;
 116         struct nvkm_top_device *info;
 117         int n = 0;
 118
 119         list_for_each_entry(info, &top->device, head) {
 120                 if (info->engine >= 0 && info->runlist >= 0 && n++ == index) {
 121                         *runl = info->runlist;
 122                         *engn = info->engine;
 123                         return info->index;
 124                 }
 125         }
 126
 127         return -ENODEV;
 128 }
 129
 130 static int
 131 nvkm_top_oneinit(struct nvkm_subdev *subdev)
 132 {
 133         struct nvkm_top *top = nvkm_top(subdev);
 134         return top->func->oneinit(top);
 135 }
 136
 137 static void *
 138 nvkm_top_dtor(struct nvkm_subdev *subdev)
 139 {
 140         struct nvkm_top *top = nvkm_top(subdev);
 141         struct nvkm_top_device *info, *temp;
 142
 143         list_for_each_entry_safe(info, temp, &top->device, head) {
 144                 list_del(&info->head);
 145                 kfree(info);
 146         }
 147
 148         return top;
 149 }
 150
 151 static const struct nvkm_subdev_func
 152 nvkm_top = {
 153         .dtor = nvkm_top_dtor,
 154         .oneinit = nvkm_top_oneinit,
 155 };
 156
 157 int
 158 nvkm_top_new_(const struct nvkm_top_func *func, struct nvkm_device *device,
 159               int index, struct nvkm_top **ptop)
 160 {
 161         struct nvkm_top *top;
 162         if (!(top = *ptop = kzalloc(sizeof(*top), GFP_KERNEL)))
 163                 return -ENOMEM;
 164         nvkm_subdev_ctor(&nvkm_top, device, index, &top->subdev);
 165         top->func = func;
 166         INIT_LIST_HEAD(&top->device);
 167         return 0;
 168 }