drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramnv20.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
  26 static int
  27 nv20_ram_create(struct nvkm_object *parent, struct nvkm_object *engine,
  28                 struct nvkm_oclass *oclass, void *data, u32 size,
  29                 struct nvkm_object **pobject)
  30 {
  31         struct nvkm_fb *pfb = nvkm_fb(parent);
  32         struct nvkm_ram *ram;
  33         u32 pbus1218 = nv_rd32(pfb, 0x001218);
  34         int ret;
  35
  36         ret = nvkm_ram_create(parent, engine, oclass, &ram);
  37         *pobject = nv_object(ram);
  38         if (ret)
  39                 return ret;
  40
  41         switch (pbus1218 & 0x00000300) {
  42         case 0x00000000: ram->type = NV_MEM_TYPE_SDRAM; break;
  43         case 0x00000100: ram->type = NV_MEM_TYPE_DDR1; break;
  44         case 0x00000200: ram->type = NV_MEM_TYPE_GDDR3; break;
  45         case 0x00000300: ram->type = NV_MEM_TYPE_GDDR2; break;
  46         }
  47         ram->size  = (nv_rd32(pfb, 0x10020c) & 0xff000000);
  48         ram->parts = (nv_rd32(pfb, 0x100200) & 0x00000003) + 1;
  49         ram->tags  = nv_rd32(pfb, 0x100320);
  50         return 0;
  51 }
  52
  53 struct nvkm_oclass
  54 nv20_ram_oclass = {
  55         .handle = 0,
  56         .ofuncs = &(struct nvkm_ofuncs) {
  57                 .ctor = nv20_ram_create,
  58                 .dtor = _nvkm_ram_dtor,
  59                 .init = _nvkm_ram_init,
  60                 .fini = _nvkm_ram_fini,
  61         }
  62 };