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 "ram.h"
  25 #include "regsnv04.h"
  26
  27 const struct nvkm_ram_func
  28 nv04_ram_func = {
  29 };
  30
  31 int
  32 nv04_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
  33 {
  34         struct nvkm_device *device = fb->subdev.device;
  35         u32 boot0 = nvkm_rd32(device, NV04_PFB_BOOT_0);
  36         u64 size;
  37         enum nvkm_ram_type type;
  38
  39         if (boot0 & 0x00000100) {
  40                 size  = ((boot0 >> 12) & 0xf) * 2 + 2;
  41                 size *= 1024 * 1024;
  42         } else {
  43                 switch (boot0 & NV04_PFB_BOOT_0_RAM_AMOUNT) {
  44                 case NV04_PFB_BOOT_0_RAM_AMOUNT_32MB:
  45                         size = 32 * 1024 * 1024;
  46                         break;
  47                 case NV04_PFB_BOOT_0_RAM_AMOUNT_16MB:
  48                         size = 16 * 1024 * 1024;
  49                         break;
  50                 case NV04_PFB_BOOT_0_RAM_AMOUNT_8MB:
  51                         size = 8 * 1024 * 1024;
  52                         break;
  53                 case NV04_PFB_BOOT_0_RAM_AMOUNT_4MB:
  54                         size = 4 * 1024 * 1024;
  55                         break;
  56                 }
  57         }
  58
  59         if ((boot0 & 0x00000038) <= 0x10)
  60                 type = NVKM_RAM_TYPE_SGRAM;
  61         else
  62                 type = NVKM_RAM_TYPE_SDRAM;
  63
  64         return nvkm_ram_new_(&nv04_ram_func, fb, type, size, pram);
  65 }