drivers/gpu/drm/nouveau/nvkm/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 #include "priv.h"
  25
  26 #include <core/device.h>
  27 #include <subdev/fb.h>
  28 #include <subdev/mmu.h>
  29
  30 struct nvkm_barobj {
  31         struct nvkm_object base;
  32         struct nvkm_vma vma;
  33         void __iomem *iomem;
  34 };
  35
  36 static int
  37 nvkm_barobj_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
  38                  struct nvkm_oclass *oclass, void *data, u32 size,
  39                  struct nvkm_object **pobject)
  40 {
  41         struct nvkm_device *device = nv_device(parent);
  42         struct nvkm_bar *bar = nvkm_bar(device);
  43         struct nvkm_mem *mem = data;
  44         struct nvkm_barobj *barobj;
  45         int ret;
  46
  47         ret = nvkm_object_create(parent, engine, oclass, 0, &barobj);
  48         *pobject = nv_object(barobj);
  49         if (ret)
  50                 return ret;
  51
  52         ret = bar->kmap(bar, mem, NV_MEM_ACCESS_RW, &barobj->vma);
  53         if (ret)
  54                 return ret;
  55
  56         barobj->iomem = ioremap(nv_device_resource_start(device, 3) +
  57                                 (u32)barobj->vma.offset, mem->size << 12);
  58         if (!barobj->iomem) {
  59                 nv_warn(bar, "PRAMIN ioremap failed\n");
  60                 return -ENOMEM;
  61         }
  62
  63         return 0;
  64 }
  65
  66 static void
  67 nvkm_barobj_dtor(struct nvkm_object *object)
  68 {
  69         struct nvkm_bar *bar = nvkm_bar(object);
  70         struct nvkm_barobj *barobj = (void *)object;
  71         if (barobj->vma.node) {
  72                 if (barobj->iomem)
  73                         iounmap(barobj->iomem);
  74                 bar->unmap(bar, &barobj->vma);
  75         }
  76         nvkm_object_destroy(&barobj->base);
  77 }
  78
  79 static u32
  80 nvkm_barobj_rd32(struct nvkm_object *object, u64 addr)
  81 {
  82         struct nvkm_barobj *barobj = (void *)object;
  83         return ioread32_native(barobj->iomem + addr);
  84 }
  85
  86 static void
  87 nvkm_barobj_wr32(struct nvkm_object *object, u64 addr, u32 data)
  88 {
  89         struct nvkm_barobj *barobj = (void *)object;
  90         iowrite32_native(data, barobj->iomem + addr);
  91 }
  92
  93 static struct nvkm_oclass
  94 nvkm_barobj_oclass = {
  95         .ofuncs = &(struct nvkm_ofuncs) {
  96                 .ctor = nvkm_barobj_ctor,
  97                 .dtor = nvkm_barobj_dtor,
  98                 .init = nvkm_object_init,
  99                 .fini = nvkm_object_fini,
 100                 .rd32 = nvkm_barobj_rd32,
 101                 .wr32 = nvkm_barobj_wr32,
 102         },
 103 };
 104
 105 int
 106 nvkm_bar_alloc(struct nvkm_bar *bar, struct nvkm_object *parent,
 107                struct nvkm_mem *mem, struct nvkm_object **pobject)
 108 {
 109         struct nvkm_object *gpuobj;
 110         int ret = nvkm_object_ctor(parent, &parent->engine->subdev.object,
 111                                    &nvkm_barobj_oclass, mem, 0, &gpuobj);
 112         if (ret == 0)
 113                 *pobject = gpuobj;
 114         return ret;
 115 }
 116
 117 int
 118 nvkm_bar_create_(struct nvkm_object *parent, struct nvkm_object *engine,
 119                  struct nvkm_oclass *oclass, int length, void **pobject)
 120 {
 121         struct nvkm_bar *bar;
 122         int ret;
 123
 124         ret = nvkm_subdev_create_(parent, engine, oclass, 0, "BARCTL",
 125                                   "bar", length, pobject);
 126         bar = *pobject;
 127         if (ret)
 128                 return ret;
 129
 130         return 0;
 131 }
 132
 133 void
 134 nvkm_bar_destroy(struct nvkm_bar *bar)
 135 {
 136         nvkm_subdev_destroy(&bar->base);
 137 }
 138
 139 void
 140 _nvkm_bar_dtor(struct nvkm_object *object)
 141 {
 142         struct nvkm_bar *bar = (void *)object;
 143         nvkm_bar_destroy(bar);
 144 }