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24#include "priv.h"
25
26#include <subdev/bios.h>
27#include <subdev/bios/bmp.h>
28#include <subdev/bios/bit.h>
29#include <subdev/bios/image.h>
30
31static bool
32nvbios_addr(struct nvkm_bios *bios, u32 *addr, u8 size)
33{
34 u32 p = *addr;
35
36 if (*addr > bios->image0_size && bios->imaged_addr) {
37 *addr -= bios->image0_size;
38 *addr += bios->imaged_addr;
39 }
40
41 if (unlikely(*addr + size >= bios->size)) {
42 nvkm_error(&bios->subdev, "OOB %d %08x %08x\n", size, p, *addr);
43 return false;
44 }
45
46 return true;
47}
48
49u8
50nvbios_rd08(struct nvkm_bios *bios, u32 addr)
51{
52 if (likely(nvbios_addr(bios, &addr, 1)))
53 return bios->data[addr];
54 return 0x00;
55}
56
57u16
58nvbios_rd16(struct nvkm_bios *bios, u32 addr)
59{
60 if (likely(nvbios_addr(bios, &addr, 2)))
61 return get_unaligned_le16(&bios->data[addr]);
62 return 0x0000;
63}
64
65u32
66nvbios_rd32(struct nvkm_bios *bios, u32 addr)
67{
68 if (likely(nvbios_addr(bios, &addr, 4)))
69 return get_unaligned_le32(&bios->data[addr]);
70 return 0x00000000;
71}
72
73u8
74nvbios_checksum(const u8 *data, int size)
75{
76 u8 sum = 0;
77 while (size--)
78 sum += *data++;
79 return sum;
80}
81
82u16
83nvbios_findstr(const u8 *data, int size, const char *str, int len)
84{
85 int i, j;
86
87 for (i = 0; i <= (size - len); i++) {
88 for (j = 0; j < len; j++)
89 if ((char)data[i + j] != str[j])
90 break;
91 if (j == len)
92 return i;
93 }
94
95 return 0;
96}
97
98int
99nvbios_memcmp(struct nvkm_bios *bios, u32 addr, const char *str, u32 len)
100{
101 unsigned char c1, c2;
102
103 while (len--) {
104 c1 = nvbios_rd08(bios, addr++);
105 c2 = *(str++);
106 if (c1 != c2)
107 return c1 - c2;
108 }
109 return 0;
110}
111
112int
113nvbios_extend(struct nvkm_bios *bios, u32 length)
114{
115 if (bios->size < length) {
116 u8 *prev = bios->data;
117 if (!(bios->data = kmalloc(length, GFP_KERNEL))) {
118 bios->data = prev;
119 return -ENOMEM;
120 }
121 memcpy(bios->data, prev, bios->size);
122 bios->size = length;
123 kfree(prev);
124 return 1;
125 }
126 return 0;
127}
128
129static void *
130nvkm_bios_dtor(struct nvkm_subdev *subdev)
131{
132 struct nvkm_bios *bios = nvkm_bios(subdev);
133 kfree(bios->data);
134 return bios;
135}
136
137static const struct nvkm_subdev_func
138nvkm_bios = {
139 .dtor = nvkm_bios_dtor,
140};
141
142int
143nvkm_bios_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
144 struct nvkm_bios **pbios)
145{
146 struct nvkm_bios *bios;
147 struct nvbios_image image;
148 struct bit_entry bit_i;
149 int ret, idx = 0;
150
151 if (!(bios = *pbios = kzalloc(sizeof(*bios), GFP_KERNEL)))
152 return -ENOMEM;
153 nvkm_subdev_ctor(&nvkm_bios, device, type, inst, &bios->subdev);
154
155 ret = nvbios_shadow(bios);
156 if (ret)
157 return ret;
158
159
160
161
162 if (nvbios_image(bios, idx++, &image)) {
163 bios->image0_size = image.size;
164 while (nvbios_image(bios, idx++, &image)) {
165 if (image.type == 0xe0) {
166 bios->imaged_addr = image.base;
167 break;
168 }
169 }
170 }
171
172
173 bios->bmp_offset = nvbios_findstr(bios->data, bios->size,
174 "\xff\x7f""NV\0", 5);
175 if (bios->bmp_offset) {
176 nvkm_debug(&bios->subdev, "BMP version %x.%x\n",
177 bmp_version(bios) >> 8,
178 bmp_version(bios) & 0xff);
179 }
180
181 bios->bit_offset = nvbios_findstr(bios->data, bios->size,
182 "\xff\xb8""BIT", 5);
183 if (bios->bit_offset)
184 nvkm_debug(&bios->subdev, "BIT signature found\n");
185
186
187 if (!bit_entry(bios, 'i', &bit_i) && bit_i.length >= 4) {
188 bios->version.major = nvbios_rd08(bios, bit_i.offset + 3);
189 bios->version.chip = nvbios_rd08(bios, bit_i.offset + 2);
190 bios->version.minor = nvbios_rd08(bios, bit_i.offset + 1);
191 bios->version.micro = nvbios_rd08(bios, bit_i.offset + 0);
192 bios->version.patch = nvbios_rd08(bios, bit_i.offset + 4);
193 } else
194 if (bmp_version(bios)) {
195 bios->version.major = nvbios_rd08(bios, bios->bmp_offset + 13);
196 bios->version.chip = nvbios_rd08(bios, bios->bmp_offset + 12);
197 bios->version.minor = nvbios_rd08(bios, bios->bmp_offset + 11);
198 bios->version.micro = nvbios_rd08(bios, bios->bmp_offset + 10);
199 }
200
201 nvkm_info(&bios->subdev, "version %02x.%02x.%02x.%02x.%02x\n",
202 bios->version.major, bios->version.chip,
203 bios->version.minor, bios->version.micro, bios->version.patch);
204 return 0;
205}
206