subdev/bios/vmap.c

0001 /*
0002  * Copyright 2012 Nouveau Community
0003  *
0004  * Permission is hereby granted, free of charge, to any person obtaining a
0005  * copy of this software and associated documentation files (the "Software"),
0006  * to deal in the Software without restriction, including without limitation
0007  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
0008  * and/or sell copies of the Software, and to permit persons to whom the
0009  * Software is furnished to do so, subject to the following conditions:
0010  *
0011  * The above copyright notice and this permission notice shall be included in
0012  * all copies or substantial portions of the Software.
0013  *
0014  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0015  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0016  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
0017  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
0018  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
0019  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
0020  * OTHER DEALINGS IN THE SOFTWARE.
0021  *
0022  * Authors: Martin Peres
0023  */
0024 #include <subdev/bios.h>
0025 #include <subdev/bios/bit.h>
0026 #include <subdev/bios/vmap.h>
0027
0028 u32
0029 nvbios_vmap_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
0030 {
0031     struct bit_entry bit_P;
0032     u32 vmap = 0;
0033
0034     if (!bit_entry(bios, 'P', &bit_P)) {
0035         if (bit_P.version == 2) {
0036             vmap = nvbios_rd32(bios, bit_P.offset + 0x20);
0037             if (vmap) {
0038                 *ver = nvbios_rd08(bios, vmap + 0);
0039                 switch (*ver) {
0040                 case 0x10:
0041                 case 0x20:
0042                     *hdr = nvbios_rd08(bios, vmap + 1);
0043                     *cnt = nvbios_rd08(bios, vmap + 3);
0044                     *len = nvbios_rd08(bios, vmap + 2);
0045                     return vmap;
0046                 default:
0047                     break;
0048                 }
0049             }
0050         }
0051     }
0052
0053     return 0;
0054 }
0055
0056 u32
0057 nvbios_vmap_parse(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
0058           struct nvbios_vmap *info)
0059 {
0060     u32 vmap = nvbios_vmap_table(bios, ver, hdr, cnt, len);
0061     memset(info, 0x00, sizeof(*info));
0062     switch (!!vmap * *ver) {
0063     case 0x10:
0064         info->max0 = 0xff;
0065         info->max1 = 0xff;
0066         info->max2 = 0xff;
0067         break;
0068     case 0x20:
0069         info->max0 = nvbios_rd08(bios, vmap + 0x7);
0070         info->max1 = nvbios_rd08(bios, vmap + 0x8);
0071         if (*len >= 0xc)
0072             info->max2 = nvbios_rd08(bios, vmap + 0xc);
0073         else
0074             info->max2 = 0xff;
0075         break;
0076     }
0077     return vmap;
0078 }
0079
0080 u32
0081 nvbios_vmap_entry(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len)
0082 {
0083     u8  hdr, cnt;
0084     u32 vmap = nvbios_vmap_table(bios, ver, &hdr, &cnt, len);
0085     if (vmap && idx < cnt) {
0086         vmap = vmap + hdr + (idx * *len);
0087         return vmap;
0088     }
0089     return 0;
0090 }
0091
0092 u32
0093 nvbios_vmap_entry_parse(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len,
0094             struct nvbios_vmap_entry *info)
0095 {
0096     u32 vmap = nvbios_vmap_entry(bios, idx, ver, len);
0097     memset(info, 0x00, sizeof(*info));
0098     switch (!!vmap * *ver) {
0099     case 0x10:
0100         info->link   = 0xff;
0101         info->min    = nvbios_rd32(bios, vmap + 0x00);
0102         info->max    = nvbios_rd32(bios, vmap + 0x04);
0103         info->arg[0] = nvbios_rd32(bios, vmap + 0x08);
0104         info->arg[1] = nvbios_rd32(bios, vmap + 0x0c);
0105         info->arg[2] = nvbios_rd32(bios, vmap + 0x10);
0106         break;
0107     case 0x20:
0108         info->mode   = nvbios_rd08(bios, vmap + 0x00);
0109         info->link   = nvbios_rd08(bios, vmap + 0x01);
0110         info->min    = nvbios_rd32(bios, vmap + 0x02);
0111         info->max    = nvbios_rd32(bios, vmap + 0x06);
0112         info->arg[0] = nvbios_rd32(bios, vmap + 0x0a);
0113         info->arg[1] = nvbios_rd32(bios, vmap + 0x0e);
0114         info->arg[2] = nvbios_rd32(bios, vmap + 0x12);
0115         info->arg[3] = nvbios_rd32(bios, vmap + 0x16);
0116         info->arg[4] = nvbios_rd32(bios, vmap + 0x1a);
0117         info->arg[5] = nvbios_rd32(bios, vmap + 0x1e);
0118         break;
0119     }
0120     return vmap;
0121 }