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 #include <core/option.h>
  27
  28 static irqreturn_t
  29 nouveau_mc_intr(int irq, void *arg)
  30 {
  31         struct nouveau_mc *pmc = arg;
  32         const struct nouveau_mc_intr *map = pmc->intr_map;
  33         struct nouveau_subdev *unit;
  34         u32 stat, intr;
  35
  36         intr = stat = nv_rd32(pmc, 0x000100);
  37         if (intr == 0xffffffff)
  38                 return IRQ_NONE;
  39         while (stat && map->stat) {
  40                 if (stat & map->stat) {
  41                         unit = nouveau_subdev(pmc, map->unit);
  42                         if (unit && unit->intr)
  43                                 unit->intr(unit);
  44                         intr &= ~map->stat;
  45                 }
  46                 map++;
  47         }
  48
  49         if (pmc->use_msi)
  50                 nv_wr08(pmc, 0x088068, 0xff);
  51
  52         if (intr) {
  53                 nv_error(pmc, "unknown intr 0x%08x\n", stat);
  54         }
  55
  56         return stat ? IRQ_HANDLED : IRQ_NONE;
  57 }
  58
  59 int
  60 _nouveau_mc_fini(struct nouveau_object *object, bool suspend)
  61 {
  62         struct nouveau_mc *pmc = (void *)object;
  63         nv_wr32(pmc, 0x000140, 0x00000000);
  64         return nouveau_subdev_fini(&pmc->base, suspend);
  65 }
  66
  67 int
  68 _nouveau_mc_init(struct nouveau_object *object)
  69 {
  70         struct nouveau_mc *pmc = (void *)object;
  71         int ret = nouveau_subdev_init(&pmc->base);
  72         if (ret)
  73                 return ret;
  74         nv_wr32(pmc, 0x000140, 0x00000001);
  75         return 0;
  76 }
  77
  78 void
  79 _nouveau_mc_dtor(struct nouveau_object *object)
  80 {
  81         struct nouveau_device *device = nv_device(object);
  82         struct nouveau_mc *pmc = (void *)object;
  83         free_irq(device->pdev->irq, pmc);
  84         if (pmc->use_msi)
  85                 pci_disable_msi(device->pdev);
  86         nouveau_subdev_destroy(&pmc->base);
  87 }
  88
  89 int
  90 nouveau_mc_create_(struct nouveau_object *parent, struct nouveau_object *engine,
  91                    struct nouveau_oclass *oclass,
  92                    const struct nouveau_mc_intr *intr_map,
  93                    int length, void **pobject)
  94 {
  95         struct nouveau_device *device = nv_device(parent);
  96         struct nouveau_mc *pmc;
  97         int ret;
  98
  99         ret = nouveau_subdev_create_(parent, engine, oclass, 0, "PMC",
 100                                      "master", length, pobject);
 101         pmc = *pobject;
 102         if (ret)
 103                 return ret;
 104
 105         pmc->intr_map = intr_map;
 106
 107         switch (device->pdev->device & 0x0ff0) {
 108         case 0x00f0: /* BR02? */
 109         case 0x02e0: /* BR02? */
 110                 pmc->use_msi = false;
 111                 break;
 112         default:
 113                 pmc->use_msi = nouveau_boolopt(device->cfgopt, "NvMSI", true);
 114                 if (pmc->use_msi) {
 115                         pmc->use_msi = pci_enable_msi(device->pdev) == 0;
 116                         if (pmc->use_msi) {
 117                                 nv_info(pmc, "MSI interrupts enabled\n");
 118                                 nv_wr08(pmc, 0x088068, 0xff);
 119                         }
 120                 }
 121                 break;
 122         }
 123
 124         ret = request_irq(device->pdev->irq, nouveau_mc_intr,
 125                           IRQF_SHARED, "nouveau", pmc);
 126         if (ret < 0)
 127                 return ret;
 128
 129         return 0;
 130 }