drivers/gpu/drm/nouveau/core/subdev/bar/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 <core/object.h>
  26
  27 #include <subdev/fb.h>
  28 #include <subdev/vm.h>
  29
  30 #include "priv.h"
  31
  32 struct nouveau_barobj {
  33         struct nouveau_object base;
  34         struct nouveau_vma vma;
  35         void __iomem *iomem;
  36 };
  37
  38 static int
  39 nouveau_barobj_ctor(struct nouveau_object *parent,
  40                     struct nouveau_object *engine,
  41                     struct nouveau_oclass *oclass, void *mem, u32 size,
  42                     struct nouveau_object **pobject)
  43 {
  44         struct nouveau_bar *bar = (void *)engine;
  45         struct nouveau_barobj *barobj;
  46         int ret;
  47
  48         ret = nouveau_object_create(parent, engine, oclass, 0, &barobj);
  49         *pobject = nv_object(barobj);
  50         if (ret)
  51                 return ret;
  52
  53         ret = bar->kmap(bar, mem, NV_MEM_ACCESS_RW, &barobj->vma);
  54         if (ret)
  55                 return ret;
  56
  57         barobj->iomem = bar->iomem + (u32)barobj->vma.offset;
  58         return 0;
  59 }
  60
  61 static void
  62 nouveau_barobj_dtor(struct nouveau_object *object)
  63 {
  64         struct nouveau_bar *bar = (void *)object->engine;
  65         struct nouveau_barobj *barobj = (void *)object;
  66         if (barobj->vma.node)
  67                 bar->unmap(bar, &barobj->vma);
  68         nouveau_object_destroy(&barobj->base);
  69 }
  70
  71 static u32
  72 nouveau_barobj_rd32(struct nouveau_object *object, u64 addr)
  73 {
  74         struct nouveau_barobj *barobj = (void *)object;
  75         return ioread32_native(barobj->iomem + addr);
  76 }
  77
  78 static void
  79 nouveau_barobj_wr32(struct nouveau_object *object, u64 addr, u32 data)
  80 {
  81         struct nouveau_barobj *barobj = (void *)object;
  82         iowrite32_native(data, barobj->iomem + addr);
  83 }
  84
  85 static struct nouveau_oclass
  86 nouveau_barobj_oclass = {
  87         .ofuncs = &(struct nouveau_ofuncs) {
  88                 .ctor = nouveau_barobj_ctor,
  89                 .dtor = nouveau_barobj_dtor,
  90                 .init = nouveau_object_init,
  91                 .fini = nouveau_object_fini,
  92                 .rd32 = nouveau_barobj_rd32,
  93                 .wr32 = nouveau_barobj_wr32,
  94         },
  95 };
  96
  97 int
  98 nouveau_bar_alloc(struct nouveau_bar *bar, struct nouveau_object *parent,
  99                   struct nouveau_mem *mem, struct nouveau_object **pobject)
 100 {
 101         struct nouveau_object *engine = nv_object(bar);
 102         return nouveau_object_ctor(parent, engine, &nouveau_barobj_oclass,
 103                                    mem, 0, pobject);
 104 }
 105
 106 int
 107 nouveau_bar_create_(struct nouveau_object *parent,
 108                     struct nouveau_object *engine,
 109                     struct nouveau_oclass *oclass, int length, void **pobject)
 110 {
 111         struct nouveau_device *device = nv_device(parent);
 112         struct nouveau_bar *bar;
 113         int ret;
 114
 115         ret = nouveau_subdev_create_(parent, engine, oclass, 0, "BARCTL",
 116                                      "bar", length, pobject);
 117         bar = *pobject;
 118         if (ret)
 119                 return ret;
 120
 121         bar->iomem = ioremap(nv_device_resource_start(device, 3),
 122                              nv_device_resource_len(device, 3));
 123         return 0;
 124 }
 125
 126 void
 127 nouveau_bar_destroy(struct nouveau_bar *bar)
 128 {
 129         if (bar->iomem)
 130                 iounmap(bar->iomem);
 131         nouveau_subdev_destroy(&bar->base);
 132 }
 133
 134 void
 135 _nouveau_bar_dtor(struct nouveau_object *object)
 136 {
 137         struct nouveau_bar *bar = (void *)object;
 138         nouveau_bar_destroy(bar);
 139 }