LXR linux/drivers/gpu/drm/nouveau/core/subdev/mc/base.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
  25#include <subdev/mc.h>
  26
  27void
  28nouveau_mc_intr(struct nouveau_subdev *subdev)
  29{
  30        struct nouveau_mc *pmc = nouveau_mc(subdev);
  31        const struct nouveau_mc_intr *map = pmc->intr_map;
  32        struct nouveau_subdev *unit;
  33        u32 stat, intr;
  34
  35        intr = stat = nv_rd32(pmc, 0x000100);
  36        while (stat && map->stat) {
  37                if (stat & map->stat) {
  38                        unit = nouveau_subdev(subdev, map->unit);
  39                        if (unit && unit->intr)
  40                                unit->intr(unit);
  41                        intr &= ~map->stat;
  42                }
  43                map++;
  44        }
  45
  46        if (intr) {
  47                nv_error(pmc, "unknown intr 0x%08x\n", stat);
  48        }
  49}
  50