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
  30 static int
  31 gp100_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
  74 static u32
  75 gp100_ram_probe_fbpa(struct nvkm_device *device, int fbpa)
  76 {
  77         return nvkm_rd32(device, 0x90020c + (fbpa * 0x4000));
  78 }
  79
  80 static const struct nvkm_ram_func
  81 gp100_ram = {
  82         .upper = 0x1000000000ULL,
  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
  89 int
  90 gp100_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 }