drivers/gpu/drm/nouveau/nvif/device.c

   1 /*
   2  * Copyright 2014 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
  25 #include <nvif/device.h>
  26
  27 void
  28 nvif_device_fini(struct nvif_device *device)
  29 {
  30         nvif_object_fini(&device->base);
  31 }
  32
  33 int
  34 nvif_device_init(struct nvif_object *parent, void (*dtor)(struct nvif_device *),
  35                  u32 handle, u32 oclass, void *data, u32 size,
  36                  struct nvif_device *device)
  37 {
  38         int ret = nvif_object_init(parent, (void *)dtor, handle, oclass,
  39                                    data, size, &device->base);
  40         if (ret == 0) {
  41                 device->object = &device->base;
  42                 device->info.version = 0;
  43                 ret = nvif_object_mthd(&device->base, NV_DEVICE_V0_INFO,
  44                                        &device->info, sizeof(device->info));
  45         }
  46         return ret;
  47 }
  48
  49 static void
  50 nvif_device_del(struct nvif_device *device)
  51 {
  52         nvif_device_fini(device);
  53         kfree(device);
  54 }
  55
  56 int
  57 nvif_device_new(struct nvif_object *parent, u32 handle, u32 oclass,
  58                 void *data, u32 size, struct nvif_device **pdevice)
  59 {
  60         struct nvif_device *device = kzalloc(sizeof(*device), GFP_KERNEL);
  61         if (device) {
  62                 int ret = nvif_device_init(parent, nvif_device_del, handle,
  63                                            oclass, data, size, device);
  64                 if (ret) {
  65                         kfree(device);
  66                         device = NULL;
  67                 }
  68                 *pdevice = device;
  69                 return ret;
  70         }
  71         return -ENOMEM;
  72 }
  73
  74 void
  75 nvif_device_ref(struct nvif_device *device, struct nvif_device **pdevice)
  76 {
  77         nvif_object_ref(&device->base, (struct nvif_object **)pdevice);
  78 }