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
  27static irqreturn_t
  28nouveau_mc_intr(int irq, void *arg)
  29{
  30        struct nouveau_mc *pmc = arg;
  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(pmc, 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        return stat ? IRQ_HANDLED : IRQ_NONE;
  51}
  52
  53int
  54_nouveau_mc_fini(struct nouveau_object *object, bool suspend)
  55{
  56        struct nouveau_mc *pmc = (void *)object;
  57        nv_wr32(pmc, 0x000140, 0x00000000);
  58        return nouveau_subdev_fini(&pmc->base, suspend);
  59}
  60
  61int
  62_nouveau_mc_init(struct nouveau_object *object)
  63{
  64        struct nouveau_mc *pmc = (void *)object;
  65        int ret = nouveau_subdev_init(&pmc->base);
  66        if (ret)
  67                return ret;
  68        nv_wr32(pmc, 0x000140, 0x00000001);
  69        return 0;
  70}
  71
  72void
  73_nouveau_mc_dtor(struct nouveau_object *object)
  74{
  75        struct nouveau_device *device = nv_device(object);
  76        struct nouveau_mc *pmc = (void *)object;
  77        free_irq(device->pdev->irq, pmc);
  78        nouveau_subdev_destroy(&pmc->base);
  79}
  80
  81int
  82nouveau_mc_create_(struct nouveau_object *parent, struct nouveau_object *engine,
  83                   struct nouveau_oclass *oclass, int length, void **pobject)
  84{
  85        struct nouveau_device *device = nv_device(parent);
  86        struct nouveau_mc *pmc;
  87        int ret;
  88
  89        ret = nouveau_subdev_create_(parent, engine, oclass, 0, "PMC",
  90                                     "master", length, pobject);
  91        pmc = *pobject;
  92        if (ret)
  93                return ret;
  94
  95        ret = request_irq(device->pdev->irq, nouveau_mc_intr,
  96                          IRQF_SHARED, "nouveau", pmc);
  97        if (ret < 0)
  98                return ret;
  99
 100        return 0;
 101}
 102