LXR linux/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
  26static void
  27nvkm_bus_intr(struct nvkm_subdev *subdev)
  28{
  29        struct nvkm_bus *bus = nvkm_bus(subdev);
  30        bus->func->intr(bus);
  31}
  32
  33static int
  34nvkm_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
  41static void *
  42nvkm_bus_dtor(struct nvkm_subdev *subdev)
  43{
  44        return nvkm_bus(subdev);
  45}
  46
  47static const struct nvkm_subdev_func
  48nvkm_bus = {
  49        .dtor = nvkm_bus_dtor,
  50        .init = nvkm_bus_init,
  51        .intr = nvkm_bus_intr,
  52};
  53
  54int
  55nvkm_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}
  65