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 || 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 *subdev)
  41 {
  42         nv_trace(subdev, "resetting...\n");
  43         nv_ofuncs(subdev)->fini(subdev, false);
  44         nv_debug(subdev, "reset\n");
  45 }
  46
  47 int
  48 nvkm_subdev_init(struct nvkm_subdev *subdev)
  49 {
  50         int ret = nvkm_object_init(&subdev->object);
  51         if (ret)
  52                 return ret;
  53
  54         nvkm_subdev_reset(&subdev->object);
  55         return 0;
  56 }
  57
  58 int
  59 _nvkm_subdev_init(struct nvkm_object *object)
  60 {
  61         return nvkm_subdev_init(nv_subdev(object));
  62 }
  63
  64 int
  65 nvkm_subdev_fini(struct nvkm_subdev *subdev, bool suspend)
  66 {
  67         if (subdev->unit) {
  68                 nv_mask(subdev, 0x000200, subdev->unit, 0x00000000);
  69                 nv_mask(subdev, 0x000200, subdev->unit, subdev->unit);
  70         }
  71
  72         return nvkm_object_fini(&subdev->object, suspend);
  73 }
  74
  75 int
  76 _nvkm_subdev_fini(struct nvkm_object *object, bool suspend)
  77 {
  78         return nvkm_subdev_fini(nv_subdev(object), suspend);
  79 }
  80
  81 void
  82 nvkm_subdev_destroy(struct nvkm_subdev *subdev)
  83 {
  84         int subidx = nv_hclass(subdev) & 0xff;
  85         nv_device(subdev)->subdev[subidx] = NULL;
  86         nvkm_object_destroy(&subdev->object);
  87 }
  88
  89 void
  90 _nvkm_subdev_dtor(struct nvkm_object *object)
  91 {
  92         nvkm_subdev_destroy(nv_subdev(object));
  93 }
  94
  95 int
  96 nvkm_subdev_create_(struct nvkm_object *parent, struct nvkm_object *engine,
  97                     struct nvkm_oclass *oclass, u32 pclass,
  98                     const char *subname, const char *sysname,
  99                     int size, void **pobject)
 100 {
 101         struct nvkm_subdev *subdev;
 102         int ret;
 103
 104         ret = nvkm_object_create_(parent, engine, oclass, pclass |
 105                                   NV_SUBDEV_CLASS, size, pobject);
 106         subdev = *pobject;
 107         if (ret)
 108                 return ret;
 109
 110         __mutex_init(&subdev->mutex, subname, &oclass->lock_class_key);
 111         subdev->name = subname;
 112
 113         if (parent) {
 114                 struct nvkm_device *device = nv_device(parent);
 115                 subdev->debug = nvkm_dbgopt(device->dbgopt, subname);
 116                 subdev->mmio  = nv_subdev(device)->mmio;
 117         }
 118
 119         return 0;
 120 }