LXR linux/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
  26u32
  27gf108_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
  44static const struct nvkm_ram_func
  45gf108_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
  56int
  57gf108_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
  58{
  59        return gf100_ram_new_(&gf108_ram, fb, pram);
  60}
  61