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
nvbios_vmap_table(struct nvkm_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len)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
nvbios_vmap_parse(struct nvkm_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len,struct nvbios_vmap * info)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
nvbios_vmap_entry(struct nvkm_bios * bios,int idx,u8 * ver,u8 * len)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
nvbios_vmap_entry_parse(struct nvkm_bios * bios,int idx,u8 * ver,u8 * len,struct nvbios_vmap_entry * info)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 }
122