drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramnv04.c

   1 /*
   2  * Copyright 2013 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 #include "regsnv04.h"
  26
  27 static int
  28 nv04_ram_create(struct nvkm_object *parent, struct nvkm_object *engine,
  29                 struct nvkm_oclass *oclass, void *data, u32 size,
  30                 struct nvkm_object **pobject)
  31 {
  32         struct nvkm_fb *pfb = nvkm_fb(parent);
  33         struct nvkm_ram *ram;
  34         u32 boot0 = nv_rd32(pfb, NV04_PFB_BOOT_0);
  35         int ret;
  36
  37         ret = nvkm_ram_create(parent, engine, oclass, &ram);
  38         *pobject = nv_object(ram);
  39         if (ret)
  40                 return ret;
  41
  42         if (boot0 & 0x00000100) {
  43                 ram->size  = ((boot0 >> 12) & 0xf) * 2 + 2;
  44                 ram->size *= 1024 * 1024;
  45         } else {
  46                 switch (boot0 & NV04_PFB_BOOT_0_RAM_AMOUNT) {
  47                 case NV04_PFB_BOOT_0_RAM_AMOUNT_32MB:
  48                         ram->size = 32 * 1024 * 1024;
  49                         break;
  50                 case NV04_PFB_BOOT_0_RAM_AMOUNT_16MB:
  51                         ram->size = 16 * 1024 * 1024;
  52                         break;
  53                 case NV04_PFB_BOOT_0_RAM_AMOUNT_8MB:
  54                         ram->size = 8 * 1024 * 1024;
  55                         break;
  56                 case NV04_PFB_BOOT_0_RAM_AMOUNT_4MB:
  57                         ram->size = 4 * 1024 * 1024;
  58                         break;
  59                 }
  60         }
  61
  62         if ((boot0 & 0x00000038) <= 0x10)
  63                 ram->type = NV_MEM_TYPE_SGRAM;
  64         else
  65                 ram->type = NV_MEM_TYPE_SDRAM;
  66
  67         return 0;
  68 }
  69
  70 struct nvkm_oclass
  71 nv04_ram_oclass = {
  72         .handle = 0,
  73         .ofuncs = &(struct nvkm_ofuncs) {
  74                 .ctor = nv04_ram_create,
  75                 .dtor = _nvkm_ram_dtor,
  76                 .init = _nvkm_ram_init,
  77                 .fini = _nvkm_ram_fini,
  78         }
  79 };