drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramgf108.c

   1 /*
   2  * Copyright 2017 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 <bskeggs@redhat.com>
  23  */
  24 #include "ram.h"
  25
  26 u32
  27 gf108_ram_probe_fbp_amount(const struct nvkm_ram_func *func, u32 fbpao,
  28                            struct nvkm_device *device, int fbp, int *pltcs)
  29 {
  30         u32 fbpt  = nvkm_rd32(device, 0x022438);
  31         u32 fbpat = nvkm_rd32(device, 0x02243c);
  32         u32 fbpas = fbpat / fbpt;
  33         u32 fbpa  = fbp * fbpas;
  34         u32 size  = 0;
  35         while (fbpas--) {
  36                 if (!(fbpao & BIT(fbpa)))
  37                         size += func->probe_fbpa_amount(device, fbpa);
  38                 fbpa++;
  39         }
  40         *pltcs = 1;
  41         return size;
  42 }
  43
  44 static const struct nvkm_ram_func
  45 gf108_ram = {
  46         .upper = 0x0200000000ULL,
  47         .probe_fbp = gf100_ram_probe_fbp,
  48         .probe_fbp_amount = gf108_ram_probe_fbp_amount,
  49         .probe_fbpa_amount = gf100_ram_probe_fbpa_amount,
  50         .init = gf100_ram_init,
  51         .calc = gf100_ram_calc,
  52         .prog = gf100_ram_prog,
  53         .tidy = gf100_ram_tidy,
  54 };
  55
  56 int
  57 gf108_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
  58 {
  59         return gf100_ram_new_(&gf108_ram, fb, pram);
  60 }