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(struct nvkm_device *device, u32 intr, u64 *psubdevs)
  61 {
  62         struct nvkm_top *top = device->top;
  63         struct nvkm_top_device *info;
  64         u64 subdevs = 0;
  65         u32 handled = 0;
  66
  67         if (top) {
  68                 list_for_each_entry(info, &top->device, head) {
  69                         if (info->index != NVKM_SUBDEV_NR && info->intr >= 0) {
  70                                 if (intr & BIT(info->intr)) {
  71                                         subdevs |= BIT_ULL(info->index);
  72                                         handled |= BIT(info->intr);
  73                                 }
  74                         }
  75                 }
  76         }
  77
  78         *psubdevs = subdevs;
  79         return intr & ~handled;
  80 }
  81
  82 enum nvkm_devidx
  83 nvkm_top_fault(struct nvkm_device *device, int fault)
  84 {
  85         struct nvkm_top *top = device->top;
  86         struct nvkm_top_device *info;
  87
  88         list_for_each_entry(info, &top->device, head) {
  89                 if (info->fault == fault)
  90                         return info->index;
  91         }
  92
  93         return NVKM_SUBDEV_NR;
  94 }
  95
  96 enum nvkm_devidx
  97 nvkm_top_engine(struct nvkm_device *device, int index, int *runl, int *engn)
  98 {
  99         struct nvkm_top *top = device->top;
 100         struct nvkm_top_device *info;
 101         int n = 0;
 102
 103         list_for_each_entry(info, &top->device, head) {
 104                 if (info->engine >= 0 && info->runlist >= 0 && n++ == index) {
 105                         *runl = info->runlist;
 106                         *engn = info->engine;
 107                         return info->index;
 108                 }
 109         }
 110
 111         return -ENODEV;
 112 }
 113
 114 static int
 115 nvkm_top_oneinit(struct nvkm_subdev *subdev)
 116 {
 117         struct nvkm_top *top = nvkm_top(subdev);
 118         return top->func->oneinit(top);
 119 }
 120
 121 static void *
 122 nvkm_top_dtor(struct nvkm_subdev *subdev)
 123 {
 124         struct nvkm_top *top = nvkm_top(subdev);
 125         struct nvkm_top_device *info, *temp;
 126
 127         list_for_each_entry_safe(info, temp, &top->device, head) {
 128                 list_del(&info->head);
 129                 kfree(info);
 130         }
 131
 132         return top;
 133 }
 134
 135 static const struct nvkm_subdev_func
 136 nvkm_top = {
 137         .dtor = nvkm_top_dtor,
 138         .oneinit = nvkm_top_oneinit,
 139 };
 140
 141 int
 142 nvkm_top_new_(const struct nvkm_top_func *func, struct nvkm_device *device,
 143               int index, struct nvkm_top **ptop)
 144 {
 145         struct nvkm_top *top;
 146         if (!(top = *ptop = kzalloc(sizeof(*top), GFP_KERNEL)))
 147                 return -ENOMEM;
 148         nvkm_subdev_ctor(&nvkm_top, device, index, &top->subdev);
 149         top->func = func;
 150         INIT_LIST_HEAD(&top->device);
 151         return 0;
 152 }