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
  26 u32
  27 gm200_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
  49 static const struct nvkm_ram_func
  50 gm200_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
  62 int
  63 gm200_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
  64 {
  65         return gk104_ram_new_(&gm200_ram, fb, pram);
  66 }