drivers/gpu/drm/nouveau/nvkm/subdev/bus/base.c

   1 /*
   2  * Copyright 2015 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 static void
  27 nvkm_bus_intr(struct nvkm_subdev *subdev)
  28 {
  29         struct nvkm_bus *bus = nvkm_bus(subdev);
  30         bus->func->intr(bus);
  31 }
  32
  33 static int
  34 nvkm_bus_init(struct nvkm_subdev *subdev)
  35 {
  36         struct nvkm_bus *bus = nvkm_bus(subdev);
  37         bus->func->init(bus);
  38         return 0;
  39 }
  40
  41 static void *
  42 nvkm_bus_dtor(struct nvkm_subdev *subdev)
  43 {
  44         return nvkm_bus(subdev);
  45 }
  46
  47 static const struct nvkm_subdev_func
  48 nvkm_bus = {
  49         .dtor = nvkm_bus_dtor,
  50         .init = nvkm_bus_init,
  51         .intr = nvkm_bus_intr,
  52 };
  53
  54 int
  55 nvkm_bus_new_(const struct nvkm_bus_func *func, struct nvkm_device *device,
  56               int index, struct nvkm_bus **pbus)
  57 {
  58         struct nvkm_bus *bus;
  59         if (!(bus = *pbus = kzalloc(sizeof(*bus), GFP_KERNEL)))
  60                 return -ENOMEM;
  61         nvkm_subdev_ctor(&nvkm_bus, device, index, &bus->subdev);
  62         bus->func = func;
  63         return 0;
  64 }