LXR linux/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramgm200.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
  27gm200_ram_probe_fbp_amount(const struct nvkm_ram_func *func, u32 fbpao,
  28                           struct nvkm_device *device, int fbp, int *pltcs)
  29{
  30        u32 ltcs  = nvkm_rd32(device, 0x022450);
  31        u32 fbpas = nvkm_rd32(device, 0x022458);
  32        u32 fbpa  = fbp * fbpas;
  33        u32 size  = 0;
  34        if (!(nvkm_rd32(device, 0x021d38) & BIT(fbp))) {
  35                u32 ltco = nvkm_rd32(device, 0x021d70 + (fbp * 4));
  36                u32 ltcm = ~ltco & ((1 << ltcs) - 1);
  37
  38                while (fbpas--) {
  39                        if (!(fbpao & (1 << fbpa)))
  40                                size += func->probe_fbpa_amount(device, fbpa);
  41                        fbpa++;
  42                }
  43
  44                *pltcs = hweight32(ltcm);
  45        }
  46        return size;
  47}
  48
  49static const struct nvkm_ram_func
  50gm200_ram = {
  51        .upper = 0x1000000000ULL,
  52        .probe_fbp = gm107_ram_probe_fbp,
  53        .probe_fbp_amount = gm200_ram_probe_fbp_amount,
  54        .probe_fbpa_amount = gf100_ram_probe_fbpa_amount,
  55        .dtor = gk104_ram_dtor,
  56        .init = gk104_ram_init,
  57        .calc = gk104_ram_calc,
  58        .prog = gk104_ram_prog,
  59        .tidy = gk104_ram_tidy,
  60};
  61
  62int
  63gm200_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
  64{
  65        return gk104_ram_new_(&gm200_ram, fb, pram);
  66}
  67