LXR linux/drivers/gpu/drm/nouveau/nvkm/subdev/bios/vmap.c

   1/*
   2 * Copyright 2012 Nouveau Community
   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: Martin Peres
  23 */
  24#include <subdev/bios.h>
  25#include <subdev/bios/bit.h>
  26#include <subdev/bios/vmap.h>
  27
  28u32
  29nvbios_vmap_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
  30{
  31        struct bit_entry bit_P;
  32        u32 vmap = 0;
  33
  34        if (!bit_entry(bios, 'P', &bit_P)) {
  35                if (bit_P.version == 2) {
  36                        vmap = nvbios_rd32(bios, bit_P.offset + 0x20);
  37                        if (vmap) {
  38                                *ver = nvbios_rd08(bios, vmap + 0);
  39                                switch (*ver) {
  40                                case 0x10:
  41                                case 0x20:
  42                                        *hdr = nvbios_rd08(bios, vmap + 1);
  43                                        *cnt = nvbios_rd08(bios, vmap + 3);
  44                                        *len = nvbios_rd08(bios, vmap + 2);
  45                                        return vmap;
  46                                default:
  47                                        break;
  48                                }
  49                        }
  50                }
  51        }
  52
  53        return 0;
  54}
  55
  56u32
  57nvbios_vmap_parse(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
  58                  struct nvbios_vmap *info)
  59{
  60        u32 vmap = nvbios_vmap_table(bios, ver, hdr, cnt, len);
  61        memset(info, 0x00, sizeof(*info));
  62        switch (!!vmap * *ver) {
  63        case 0x10:
  64                info->max0 = 0xff;
  65                info->max1 = 0xff;
  66                info->max2 = 0xff;
  67                break;
  68        case 0x20:
  69                info->max0 = nvbios_rd08(bios, vmap + 0x7);
  70                info->max1 = nvbios_rd08(bios, vmap + 0x8);
  71                if (*len >= 0xc)
  72                        info->max2 = nvbios_rd08(bios, vmap + 0xc);
  73                else
  74                        info->max2 = 0xff;
  75                break;
  76        }
  77        return vmap;
  78}
  79
  80u32
  81nvbios_vmap_entry(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len)
  82{
  83        u8  hdr, cnt;
  84        u32 vmap = nvbios_vmap_table(bios, ver, &hdr, &cnt, len);
  85        if (vmap && idx < cnt) {
  86                vmap = vmap + hdr + (idx * *len);
  87                return vmap;
  88        }
  89        return 0;
  90}
  91
  92u32
  93nvbios_vmap_entry_parse(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len,
  94                        struct nvbios_vmap_entry *info)
  95{
  96        u32 vmap = nvbios_vmap_entry(bios, idx, ver, len);
  97        memset(info, 0x00, sizeof(*info));
  98        switch (!!vmap * *ver) {
  99        case 0x10:
 100                info->link   = 0xff;
 101                info->min    = nvbios_rd32(bios, vmap + 0x00);
 102                info->max    = nvbios_rd32(bios, vmap + 0x04);
 103                info->arg[0] = nvbios_rd32(bios, vmap + 0x08);
 104                info->arg[1] = nvbios_rd32(bios, vmap + 0x0c);
 105                info->arg[2] = nvbios_rd32(bios, vmap + 0x10);
 106                break;
 107        case 0x20:
 108                info->mode   = nvbios_rd08(bios, vmap + 0x00);
 109                info->link   = nvbios_rd08(bios, vmap + 0x01);
 110                info->min    = nvbios_rd32(bios, vmap + 0x02);
 111                info->max    = nvbios_rd32(bios, vmap + 0x06);
 112                info->arg[0] = nvbios_rd32(bios, vmap + 0x0a);
 113                info->arg[1] = nvbios_rd32(bios, vmap + 0x0e);
 114                info->arg[2] = nvbios_rd32(bios, vmap + 0x12);
 115                info->arg[3] = nvbios_rd32(bios, vmap + 0x16);
 116                info->arg[4] = nvbios_rd32(bios, vmap + 0x1a);
 117                info->arg[5] = nvbios_rd32(bios, vmap + 0x1e);
 118                break;
 119        }
 120        return vmap;
 121}
 122