root/drivers/gpu/drm/nouveau/nvkm/subdev/bios/vmap.c

DEFINITIONS

1. nvbios_vmap_table
2. nvbios_vmap_parse
3. nvbios_vmap_entry
4. nvbios_vmap_entry_parse

   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 
  28 u32
  29 nvbios_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 
  56 u32
  57 nvbios_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 
  80 u32
  81 nvbios_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 
  92 u32
  93 nvbios_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 }