1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
/*
* Copyright 2012 Red Hat Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: Ben Skeggs
*/
#include "priv.h"
#include <subdev/bios.h>
#include <subdev/bios/bmp.h>
#include <subdev/bios/bit.h>
#include <subdev/bios/image.h>
static bool
nvbios_addr(struct nvkm_bios *bios, u32 *addr, u8 size)
{
u32 p = *addr;
if (*addr >= bios->image0_size && bios->imaged_addr) {
*addr -= bios->image0_size;
*addr += bios->imaged_addr;
}
if (unlikely(*addr + size > bios->size)) {
nvkm_error(&bios->subdev, "OOB %d %08x %08x\n", size, p, *addr);
return false;
}
return true;
}
u8
nvbios_rd08(struct nvkm_bios *bios, u32 addr)
{
if (likely(nvbios_addr(bios, &addr, 1)))
return bios->data[addr];
return 0x00;
}
u16
nvbios_rd16(struct nvkm_bios *bios, u32 addr)
{
if (likely(nvbios_addr(bios, &addr, 2)))
return get_unaligned_le16(&bios->data[addr]);
return 0x0000;
}
u32
nvbios_rd32(struct nvkm_bios *bios, u32 addr)
{
if (likely(nvbios_addr(bios, &addr, 4)))
return get_unaligned_le32(&bios->data[addr]);
return 0x00000000;
}
u8
nvbios_checksum(const u8 *data, int size)
{
u8 sum = 0;
while (size--)
sum += *data++;
return sum;
}
u16
nvbios_findstr(const u8 *data, int size, const char *str, int len)
{
int i, j;
for (i = 0; i <= (size - len); i++) {
for (j = 0; j < len; j++)
if ((char)data[i + j] != str[j])
break;
if (j == len)
return i;
}
return 0;
}
int
nvbios_memcmp(struct nvkm_bios *bios, u32 addr, const char *str, u32 len)
{
unsigned char c1, c2;
while (len--) {
c1 = nvbios_rd08(bios, addr++);
c2 = *(str++);
if (c1 != c2)
return c1 - c2;
}
return 0;
}
int
nvbios_extend(struct nvkm_bios *bios, u32 length)
{
if (bios->size < length) {
u8 *prev = bios->data;
if (!(bios->data = kmalloc(length, GFP_KERNEL))) {
bios->data = prev;
return -ENOMEM;
}
memcpy(bios->data, prev, bios->size);
bios->size = length;
kfree(prev);
return 1;
}
return 0;
}
static void *
nvkm_bios_dtor(struct nvkm_subdev *subdev)
{
struct nvkm_bios *bios = nvkm_bios(subdev);
kfree(bios->data);
return bios;
}
static const struct nvkm_subdev_func
nvkm_bios = {
.dtor = nvkm_bios_dtor,
};
int
nvkm_bios_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
struct nvkm_bios **pbios)
{
struct nvkm_bios *bios;
struct nvbios_image image;
struct bit_entry bit_i;
int ret, idx = 0;
if (!(bios = *pbios = kzalloc(sizeof(*bios), GFP_KERNEL)))
return -ENOMEM;
nvkm_subdev_ctor(&nvkm_bios, device, type, inst, &bios->subdev);
ret = nvbios_shadow(bios);
if (ret)
return ret;
/* Some tables have weird pointers that need adjustment before
* they're dereferenced. I'm not entirely sure why...
*/
if (nvbios_image(bios, idx++, &image)) {
bios->image0_size = image.size;
while (nvbios_image(bios, idx++, &image)) {
if (image.type == 0xe0) {
bios->imaged_addr = image.base;
break;
}
}
}
/* detect type of vbios we're dealing with */
bios->bmp_offset = nvbios_findstr(bios->data, bios->size,
"\xff\x7f""NV\0", 5);
if (bios->bmp_offset) {
nvkm_debug(&bios->subdev, "BMP version %x.%x\n",
bmp_version(bios) >> 8,
bmp_version(bios) & 0xff);
}
bios->bit_offset = nvbios_findstr(bios->data, bios->size,
"\xff\xb8""BIT", 5);
if (bios->bit_offset)
nvkm_debug(&bios->subdev, "BIT signature found\n");
/* determine the vbios version number */
if (!bit_entry(bios, 'i', &bit_i) && bit_i.length >= 4) {
bios->version.major = nvbios_rd08(bios, bit_i.offset + 3);
bios->version.chip = nvbios_rd08(bios, bit_i.offset + 2);
bios->version.minor = nvbios_rd08(bios, bit_i.offset + 1);
bios->version.micro = nvbios_rd08(bios, bit_i.offset + 0);
bios->version.patch = nvbios_rd08(bios, bit_i.offset + 4);
} else
if (bmp_version(bios)) {
bios->version.major = nvbios_rd08(bios, bios->bmp_offset + 13);
bios->version.chip = nvbios_rd08(bios, bios->bmp_offset + 12);
bios->version.minor = nvbios_rd08(bios, bios->bmp_offset + 11);
bios->version.micro = nvbios_rd08(bios, bios->bmp_offset + 10);
}
nvkm_info(&bios->subdev, "version %02x.%02x.%02x.%02x.%02x\n",
bios->version.major, bios->version.chip,
bios->version.minor, bios->version.micro, bios->version.patch);
return 0;
}
|
