LXR linux/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramgp100.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
  26#include <subdev/bios.h>
  27#include <subdev/bios/init.h>
  28#include <subdev/bios/rammap.h>
  29
  30static int
  31gp100_ram_init(struct nvkm_ram *ram)
  32{
  33        struct nvkm_subdev *subdev = &ram->fb->subdev;
  34        struct nvkm_device *device = subdev->device;
  35        struct nvkm_bios *bios = device->bios;
  36        u8  ver, hdr, cnt, len, snr, ssz;
  37        u32 data;
  38        int i;
  39
  40        /* run a bunch of tables from rammap table.  there's actually
  41         * individual pointers for each rammap entry too, but, nvidia
  42         * seem to just run the last two entries' scripts early on in
  43         * their init, and never again.. we'll just run 'em all once
  44         * for now.
  45         *
  46         * i strongly suspect that each script is for a separate mode
  47         * (likely selected by 0x9a065c's lower bits?), and the
  48         * binary driver skips the one that's already been setup by
  49         * the init tables.
  50         */
  51        data = nvbios_rammapTe(bios, &ver, &hdr, &cnt, &len, &snr, &ssz);
  52        if (!data || hdr < 0x15)
  53                return -EINVAL;
  54
  55        cnt  = nvbios_rd08(bios, data + 0x14); /* guess at count */
  56        data = nvbios_rd32(bios, data + 0x10); /* guess u32... */
  57        if (cnt) {
  58                u32 save = nvkm_rd32(device, 0x9a065c) & 0x000000f0;
  59                for (i = 0; i < cnt; i++, data += 4) {
  60                        if (i != save >> 4) {
  61                                nvkm_mask(device, 0x9a065c, 0x000000f0, i << 4);
  62                                nvbios_init(subdev, nvbios_rd32(bios, data));
  63                        }
  64                }
  65                nvkm_mask(device, 0x9a065c, 0x000000f0, save);
  66        }
  67
  68        nvkm_mask(device, 0x9a0584, 0x11000000, 0x00000000);
  69        nvkm_wr32(device, 0x10ecc0, 0xffffffff);
  70        nvkm_mask(device, 0x9a0160, 0x00000010, 0x00000010);
  71        return 0;
  72}
  73
  74static u32
  75gp100_ram_probe_fbpa(struct nvkm_device *device, int fbpa)
  76{
  77        return nvkm_rd32(device, 0x90020c + (fbpa * 0x4000));
  78}
  79
  80static const struct nvkm_ram_func
  81gp100_ram = {
  82        .upper = 0x1000000000,
  83        .probe_fbp = gm107_ram_probe_fbp,
  84        .probe_fbp_amount = gm200_ram_probe_fbp_amount,
  85        .probe_fbpa_amount = gp100_ram_probe_fbpa,
  86        .init = gp100_ram_init,
  87};
  88
  89int
  90gp100_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
  91{
  92        struct nvkm_ram *ram;
  93
  94        if (!(ram = *pram = kzalloc(sizeof(*ram), GFP_KERNEL)))
  95                return -ENOMEM;
  96
  97        return gf100_ram_ctor(&gp100_ram, fb, ram);
  98
  99}
 100