1 /* $NetBSD: nouveau_nvkm_subdev_bios_vmap.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $ */
2
3 /*
4 * Copyright 2012 Nouveau Community
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Martin Peres
25 */
26 #include <sys/cdefs.h>
27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_bios_vmap.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $");
28
29 #include <subdev/bios.h>
30 #include <subdev/bios/bit.h>
31 #include <subdev/bios/vmap.h>
32
33 u32
nvbios_vmap_table(struct nvkm_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len)34 nvbios_vmap_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
35 {
36 struct bit_entry bit_P;
37 u32 vmap = 0;
38
39 if (!bit_entry(bios, 'P', &bit_P)) {
40 if (bit_P.version == 2) {
41 vmap = nvbios_rd32(bios, bit_P.offset + 0x20);
42 if (vmap) {
43 *ver = nvbios_rd08(bios, vmap + 0);
44 switch (*ver) {
45 case 0x10:
46 case 0x20:
47 *hdr = nvbios_rd08(bios, vmap + 1);
48 *cnt = nvbios_rd08(bios, vmap + 3);
49 *len = nvbios_rd08(bios, vmap + 2);
50 return vmap;
51 default:
52 break;
53 }
54 }
55 }
56 }
57
58 return 0;
59 }
60
61 u32
nvbios_vmap_parse(struct nvkm_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len,struct nvbios_vmap * info)62 nvbios_vmap_parse(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
63 struct nvbios_vmap *info)
64 {
65 u32 vmap = nvbios_vmap_table(bios, ver, hdr, cnt, len);
66 memset(info, 0x00, sizeof(*info));
67 switch (!!vmap * *ver) {
68 case 0x10:
69 info->max0 = 0xff;
70 info->max1 = 0xff;
71 info->max2 = 0xff;
72 break;
73 case 0x20:
74 info->max0 = nvbios_rd08(bios, vmap + 0x7);
75 info->max1 = nvbios_rd08(bios, vmap + 0x8);
76 if (*len >= 0xc)
77 info->max2 = nvbios_rd08(bios, vmap + 0xc);
78 else
79 info->max2 = 0xff;
80 break;
81 }
82 return vmap;
83 }
84
85 u32
nvbios_vmap_entry(struct nvkm_bios * bios,int idx,u8 * ver,u8 * len)86 nvbios_vmap_entry(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len)
87 {
88 u8 hdr, cnt;
89 u32 vmap = nvbios_vmap_table(bios, ver, &hdr, &cnt, len);
90 if (vmap && idx < cnt) {
91 vmap = vmap + hdr + (idx * *len);
92 return vmap;
93 }
94 return 0;
95 }
96
97 u32
nvbios_vmap_entry_parse(struct nvkm_bios * bios,int idx,u8 * ver,u8 * len,struct nvbios_vmap_entry * info)98 nvbios_vmap_entry_parse(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len,
99 struct nvbios_vmap_entry *info)
100 {
101 u32 vmap = nvbios_vmap_entry(bios, idx, ver, len);
102 memset(info, 0x00, sizeof(*info));
103 switch (!!vmap * *ver) {
104 case 0x10:
105 info->link = 0xff;
106 info->min = nvbios_rd32(bios, vmap + 0x00);
107 info->max = nvbios_rd32(bios, vmap + 0x04);
108 info->arg[0] = nvbios_rd32(bios, vmap + 0x08);
109 info->arg[1] = nvbios_rd32(bios, vmap + 0x0c);
110 info->arg[2] = nvbios_rd32(bios, vmap + 0x10);
111 break;
112 case 0x20:
113 info->mode = nvbios_rd08(bios, vmap + 0x00);
114 info->link = nvbios_rd08(bios, vmap + 0x01);
115 info->min = nvbios_rd32(bios, vmap + 0x02);
116 info->max = nvbios_rd32(bios, vmap + 0x06);
117 info->arg[0] = nvbios_rd32(bios, vmap + 0x0a);
118 info->arg[1] = nvbios_rd32(bios, vmap + 0x0e);
119 info->arg[2] = nvbios_rd32(bios, vmap + 0x12);
120 info->arg[3] = nvbios_rd32(bios, vmap + 0x16);
121 info->arg[4] = nvbios_rd32(bios, vmap + 0x1a);
122 info->arg[5] = nvbios_rd32(bios, vmap + 0x1e);
123 break;
124 }
125 return vmap;
126 }
127