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_top *top, enum nvkm_devidx index)
  45 {
  46         struct nvkm_top_device *info;
  47
  48         if (top) {
  49                 list_for_each_entry(info, &top->device, head) {
  50                         if (info->index == index && info->reset >= 0)
  51                                 return BIT(info->reset);
  52                 }
  53         }
  54
  55         return 0;
  56 }
  57
  58 u32
  59 nvkm_top_intr(struct nvkm_top *top, u32 intr, u64 *psubdevs)
  60 {
  61         struct nvkm_top_device *info;
  62         u64 subdevs = 0;
  63         u32 handled = 0;
  64
  65         if (top) {
  66                 list_for_each_entry(info, &top->device, head) {
  67                         if (info->index != NVKM_SUBDEV_NR && info->intr >= 0) {
  68                                 if (intr & BIT(info->intr)) {
  69                                         subdevs |= BIT_ULL(info->index);
  70                                         handled |= BIT(info->intr);
  71                                 }
  72                         }
  73                 }
  74         }
  75
  76         *psubdevs = subdevs;
  77         return intr & ~handled;
  78 }
  79
  80 enum nvkm_devidx
  81 nvkm_top_fault(struct nvkm_top *top, int fault)
  82 {
  83         struct nvkm_top_device *info;
  84
  85         list_for_each_entry(info, &top->device, head) {
  86                 if (info->fault == fault)
  87                         return info->index;
  88         }
  89
  90         return NVKM_SUBDEV_NR;
  91 }
  92
  93 enum nvkm_devidx
  94 nvkm_top_engine(struct nvkm_top *top, int index, int *runl, int *engn)
  95 {
  96         struct nvkm_top_device *info;
  97         int n = 0;
  98
  99         list_for_each_entry(info, &top->device, head) {
 100                 if (info->engine >= 0 && info->runlist >= 0 && n++ == index) {
 101                         *runl = info->runlist;
 102                         *engn = info->engine;
 103                         return info->index;
 104                 }
 105         }
 106
 107         return -ENODEV;
 108 }
 109
 110 static int
 111 nvkm_top_oneinit(struct nvkm_subdev *subdev)
 112 {
 113         struct nvkm_top *top = nvkm_top(subdev);
 114         return top->func->oneinit(top);
 115 }
 116
 117 static void *
 118 nvkm_top_dtor(struct nvkm_subdev *subdev)
 119 {
 120         struct nvkm_top *top = nvkm_top(subdev);
 121         struct nvkm_top_device *info, *temp;
 122
 123         list_for_each_entry_safe(info, temp, &top->device, head) {
 124                 list_del(&info->head);
 125                 kfree(info);
 126         }
 127
 128         return top;
 129 }
 130
 131 static const struct nvkm_subdev_func
 132 nvkm_top = {
 133         .dtor = nvkm_top_dtor,
 134         .oneinit = nvkm_top_oneinit,
 135 };
 136
 137 int
 138 nvkm_top_new_(const struct nvkm_top_func *func, struct nvkm_device *device,
 139               int index, struct nvkm_top **ptop)
 140 {
 141         struct nvkm_top *top;
 142         if (!(top = *ptop = kzalloc(sizeof(*top), GFP_KERNEL)))
 143                 return -ENOMEM;
 144         nvkm_subdev_ctor(&nvkm_top, device, index, &top->subdev);
 145         top->func = func;
 146         INIT_LIST_HEAD(&top->device);
 147         return 0;
 148 }