drivers/gpu/drm/nouveau/nvkm/core/subdev.c

   1 /*
   2  * Copyright 2012 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
  23  */
  24 #include <core/subdev.h>
  25 #include <core/device.h>
  26 #include <core/option.h>
  27
  28 struct nvkm_subdev *
  29 nvkm_subdev(void *obj, int idx)
  30 {
  31         struct nvkm_object *object = nv_object(obj);
  32         while (object && !nv_iclass(object, NV_SUBDEV_CLASS))
  33                 object = object->parent;
  34         if (object == NULL || !object->parent || nv_subidx(nv_subdev(object)) != idx)
  35                 object = nv_device(obj)->subdev[idx];
  36         return object ? nv_subdev(object) : NULL;
  37 }
  38
  39 void
  40 nvkm_subdev_reset(struct nvkm_object *obj)
  41 {
  42         struct nvkm_subdev *subdev = container_of(obj, typeof(*subdev), object);
  43         nvkm_trace(subdev, "resetting...\n");
  44         nv_ofuncs(subdev)->fini(&subdev->object, false);
  45         nvkm_trace(subdev, "reset\n");
  46 }
  47
  48 int
  49 nvkm_subdev_init(struct nvkm_subdev *subdev)
  50 {
  51         int ret = nvkm_object_init(&subdev->object);
  52         if (ret)
  53                 return ret;
  54
  55         nvkm_subdev_reset(&subdev->object);
  56         return 0;
  57 }
  58
  59 int
  60 _nvkm_subdev_init(struct nvkm_object *object)
  61 {
  62         return nvkm_subdev_init(nv_subdev(object));
  63 }
  64
  65 int
  66 nvkm_subdev_fini(struct nvkm_subdev *subdev, bool suspend)
  67 {
  68         struct nvkm_device *device = subdev->device;
  69
  70         if (subdev->unit) {
  71                 nvkm_mask(device, 0x000200, subdev->unit, 0x00000000);
  72                 nvkm_mask(device, 0x000200, subdev->unit, subdev->unit);
  73         }
  74
  75         return nvkm_object_fini(&subdev->object, suspend);
  76 }
  77
  78 int
  79 _nvkm_subdev_fini(struct nvkm_object *object, bool suspend)
  80 {
  81         return nvkm_subdev_fini(nv_subdev(object), suspend);
  82 }
  83
  84 void
  85 nvkm_subdev_destroy(struct nvkm_subdev *subdev)
  86 {
  87         int subidx = nv_hclass(subdev) & 0xff;
  88         nv_device(subdev)->subdev[subidx] = NULL;
  89         nvkm_object_destroy(&subdev->object);
  90 }
  91
  92 void
  93 _nvkm_subdev_dtor(struct nvkm_object *object)
  94 {
  95         nvkm_subdev_destroy(nv_subdev(object));
  96 }
  97
  98 int
  99 nvkm_subdev_create_(struct nvkm_object *parent, struct nvkm_object *engine,
 100                     struct nvkm_oclass *oclass, u32 pclass,
 101                     const char *subname, const char *sysname,
 102                     int size, void **pobject)
 103 {
 104         struct nvkm_subdev *subdev;
 105         int ret;
 106
 107         ret = nvkm_object_create_(parent, engine, oclass, pclass |
 108                                   NV_SUBDEV_CLASS, size, pobject);
 109         subdev = *pobject;
 110         if (ret)
 111                 return ret;
 112
 113         __mutex_init(&subdev->mutex, subname, &oclass->lock_class_key);
 114         subdev->name = subname;
 115         subdev->sname = sysname;
 116
 117         if (parent) {
 118                 struct nvkm_device *device = nv_device(parent);
 119                 subdev->debug = nvkm_dbgopt(device->dbgopt, subname);
 120                 subdev->device = device;
 121         } else {
 122                 subdev->device = nv_device(subdev);
 123         }
 124
 125         return 0;
 126 }