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Rev | Author | Line No. | Line |
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3263 | Serge | 1 | #include |
2 | #include |
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3260 | Serge | 3 | #include |
4 | #include |
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5 | #include "i915_drv.h" |
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6 | #include "intel_drv.h" |
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3480 | Serge | 7 | #include |
6084 | serge | 8 | #include |
9 | #include |
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3260 | Serge | 10 | |
11 | struct file *shmem_file_setup(const char *name, loff_t size, unsigned long flags) |
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12 | { |
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13 | struct file *filep; |
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14 | int count; |
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15 | |||
5354 | serge | 16 | filep = __builtin_malloc(sizeof(*filep)); |
3260 | Serge | 17 | |
18 | if(unlikely(filep == NULL)) |
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19 | return ERR_PTR(-ENOMEM); |
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20 | |||
21 | count = size / PAGE_SIZE; |
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22 | |||
23 | filep->pages = kzalloc(sizeof(struct page *) * count, 0); |
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24 | if(unlikely(filep->pages == NULL)) |
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25 | { |
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26 | kfree(filep); |
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27 | return ERR_PTR(-ENOMEM); |
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28 | }; |
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29 | |||
30 | filep->count = count; |
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31 | filep->allocated = 0; |
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32 | filep->vma = NULL; |
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33 | |||
3298 | Serge | 34 | // printf("%s file %p pages %p count %d\n", |
35 | // __FUNCTION__,filep, filep->pages, count); |
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3260 | Serge | 36 | |
37 | return filep; |
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38 | } |
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39 | |||
40 | struct page *shmem_read_mapping_page_gfp(struct file *filep, |
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41 | pgoff_t index, gfp_t gfp) |
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42 | { |
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43 | struct page *page; |
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44 | |||
45 | if(unlikely(index >= filep->count)) |
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46 | return ERR_PTR(-EINVAL); |
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47 | |||
48 | page = filep->pages[index]; |
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49 | |||
50 | if(unlikely(page == NULL)) |
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51 | { |
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52 | page = (struct page *)AllocPage(); |
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53 | |||
54 | if(unlikely(page == NULL)) |
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55 | return ERR_PTR(-ENOMEM); |
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56 | |||
57 | filep->pages[index] = page; |
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4246 | Serge | 58 | // printf("file %p index %d page %x\n", filep, index, page); |
59 | // delay(1); |
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60 | |||
3260 | Serge | 61 | }; |
62 | |||
63 | return page; |
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64 | }; |
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3263 | Serge | 65 | |
66 | unsigned long vm_mmap(struct file *file, unsigned long addr, |
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67 | unsigned long len, unsigned long prot, |
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68 | unsigned long flag, unsigned long offset) |
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69 | { |
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70 | char *mem, *ptr; |
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71 | int i; |
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72 | |||
73 | if (unlikely(offset + PAGE_ALIGN(len) < offset)) |
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74 | return -EINVAL; |
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75 | if (unlikely(offset & ~PAGE_MASK)) |
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76 | return -EINVAL; |
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77 | |||
78 | mem = UserAlloc(len); |
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79 | if(unlikely(mem == NULL)) |
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80 | return -ENOMEM; |
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81 | |||
82 | for(i = offset, ptr = mem; i < offset+len; i+= 4096, ptr+= 4096) |
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83 | { |
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84 | struct page *page; |
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85 | |||
86 | page = shmem_read_mapping_page_gfp(file, i/PAGE_SIZE,0); |
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87 | |||
88 | if (unlikely(IS_ERR(page))) |
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89 | goto err; |
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90 | |||
91 | MapPage(ptr, (addr_t)page, PG_SHARED|PG_UW); |
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92 | } |
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93 | |||
94 | return (unsigned long)mem; |
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95 | err: |
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96 | UserFree(mem); |
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97 | return -ENOMEM; |
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98 | }; |
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99 | |||
3290 | Serge | 100 | void shmem_file_delete(struct file *filep) |
101 | { |
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3298 | Serge | 102 | // printf("%s file %p pages %p count %d\n", |
103 | // __FUNCTION__, filep, filep->pages, filep->count); |
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3263 | Serge | 104 | |
3290 | Serge | 105 | if(filep->pages) |
106 | kfree(filep->pages); |
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107 | } |
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3480 | Serge | 108 | |
109 | |||
110 | |||
111 | static void *check_bytes8(const u8 *start, u8 value, unsigned int bytes) |
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112 | { |
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113 | while (bytes) { |
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114 | if (*start != value) |
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115 | return (void *)start; |
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116 | start++; |
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117 | bytes--; |
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118 | } |
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119 | return NULL; |
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120 | } |
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121 | |||
122 | /** |
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123 | * memchr_inv - Find an unmatching character in an area of memory. |
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124 | * @start: The memory area |
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125 | * @c: Find a character other than c |
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126 | * @bytes: The size of the area. |
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127 | * |
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128 | * returns the address of the first character other than @c, or %NULL |
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129 | * if the whole buffer contains just @c. |
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130 | */ |
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131 | void *memchr_inv(const void *start, int c, size_t bytes) |
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132 | { |
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133 | u8 value = c; |
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134 | u64 value64; |
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135 | unsigned int words, prefix; |
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136 | |||
137 | if (bytes <= 16) |
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138 | return check_bytes8(start, value, bytes); |
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139 | |||
140 | value64 = value; |
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141 | #if defined(ARCH_HAS_FAST_MULTIPLIER) && BITS_PER_LONG == 64 |
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142 | value64 *= 0x0101010101010101; |
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143 | #elif defined(ARCH_HAS_FAST_MULTIPLIER) |
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144 | value64 *= 0x01010101; |
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145 | value64 |= value64 << 32; |
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146 | #else |
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147 | value64 |= value64 << 8; |
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148 | value64 |= value64 << 16; |
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149 | value64 |= value64 << 32; |
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150 | #endif |
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151 | |||
152 | prefix = (unsigned long)start % 8; |
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153 | if (prefix) { |
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154 | u8 *r; |
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155 | |||
156 | prefix = 8 - prefix; |
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157 | r = check_bytes8(start, value, prefix); |
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158 | if (r) |
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159 | return r; |
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160 | start += prefix; |
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161 | bytes -= prefix; |
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162 | } |
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163 | |||
164 | words = bytes / 8; |
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165 | |||
166 | while (words) { |
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167 | if (*(u64 *)start != value64) |
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168 | return check_bytes8(start, value, 8); |
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169 | start += 8; |
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170 | words--; |
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171 | } |
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172 | |||
173 | return check_bytes8(start, value, bytes % 8); |
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174 | } |
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175 | |||
176 | |||
177 | |||
178 | int dma_map_sg(struct device *dev, struct scatterlist *sglist, |
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179 | int nelems, int dir) |
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180 | { |
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181 | struct scatterlist *s; |
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182 | int i; |
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183 | |||
184 | for_each_sg(sglist, s, nelems, i) { |
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185 | s->dma_address = (dma_addr_t)sg_phys(s); |
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186 | #ifdef CONFIG_NEED_SG_DMA_LENGTH |
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187 | s->dma_length = s->length; |
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188 | #endif |
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189 | } |
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190 | |||
191 | return nelems; |
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192 | } |
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193 | |||
194 | |||
195 | |||
196 | #define _U 0x01 /* upper */ |
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197 | #define _L 0x02 /* lower */ |
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198 | #define _D 0x04 /* digit */ |
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199 | #define _C 0x08 /* cntrl */ |
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200 | #define _P 0x10 /* punct */ |
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201 | #define _S 0x20 /* white space (space/lf/tab) */ |
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202 | #define _X 0x40 /* hex digit */ |
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203 | #define _SP 0x80 /* hard space (0x20) */ |
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204 | |||
205 | extern const unsigned char _ctype[]; |
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206 | |||
207 | #define __ismask(x) (_ctype[(int)(unsigned char)(x)]) |
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208 | |||
209 | #define isalnum(c) ((__ismask(c)&(_U|_L|_D)) != 0) |
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210 | #define isalpha(c) ((__ismask(c)&(_U|_L)) != 0) |
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211 | #define iscntrl(c) ((__ismask(c)&(_C)) != 0) |
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212 | #define isdigit(c) ((__ismask(c)&(_D)) != 0) |
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213 | #define isgraph(c) ((__ismask(c)&(_P|_U|_L|_D)) != 0) |
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214 | #define islower(c) ((__ismask(c)&(_L)) != 0) |
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215 | #define isprint(c) ((__ismask(c)&(_P|_U|_L|_D|_SP)) != 0) |
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216 | #define ispunct(c) ((__ismask(c)&(_P)) != 0) |
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217 | /* Note: isspace() must return false for %NUL-terminator */ |
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218 | #define isspace(c) ((__ismask(c)&(_S)) != 0) |
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219 | #define isupper(c) ((__ismask(c)&(_U)) != 0) |
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220 | #define isxdigit(c) ((__ismask(c)&(_D|_X)) != 0) |
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221 | |||
222 | #define isascii(c) (((unsigned char)(c))<=0x7f) |
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223 | #define toascii(c) (((unsigned char)(c))&0x7f) |
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224 | |||
225 | static inline unsigned char __tolower(unsigned char c) |
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226 | { |
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227 | if (isupper(c)) |
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228 | c -= 'A'-'a'; |
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229 | return c; |
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230 | } |
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231 | |||
232 | static inline unsigned char __toupper(unsigned char c) |
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233 | { |
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234 | if (islower(c)) |
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235 | c -= 'a'-'A'; |
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236 | return c; |
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237 | } |
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238 | |||
239 | #define tolower(c) __tolower(c) |
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240 | #define toupper(c) __toupper(c) |
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241 | |||
242 | /* |
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243 | * Fast implementation of tolower() for internal usage. Do not use in your |
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244 | * code. |
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245 | */ |
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246 | static inline char _tolower(const char c) |
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247 | { |
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248 | return c | 0x20; |
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249 | } |
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250 | |||
251 | |||
252 | //const char hex_asc[] = "0123456789abcdef"; |
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253 | |||
254 | /** |
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255 | * hex_to_bin - convert a hex digit to its real value |
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256 | * @ch: ascii character represents hex digit |
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257 | * |
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258 | * hex_to_bin() converts one hex digit to its actual value or -1 in case of bad |
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259 | * input. |
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260 | */ |
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261 | int hex_to_bin(char ch) |
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262 | { |
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263 | if ((ch >= '0') && (ch <= '9')) |
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264 | return ch - '0'; |
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265 | ch = tolower(ch); |
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266 | if ((ch >= 'a') && (ch <= 'f')) |
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267 | return ch - 'a' + 10; |
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268 | return -1; |
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269 | } |
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270 | EXPORT_SYMBOL(hex_to_bin); |
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271 | |||
272 | /** |
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273 | * hex2bin - convert an ascii hexadecimal string to its binary representation |
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274 | * @dst: binary result |
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275 | * @src: ascii hexadecimal string |
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276 | * @count: result length |
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277 | * |
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278 | * Return 0 on success, -1 in case of bad input. |
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279 | */ |
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280 | int hex2bin(u8 *dst, const char *src, size_t count) |
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281 | { |
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282 | while (count--) { |
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283 | int hi = hex_to_bin(*src++); |
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284 | int lo = hex_to_bin(*src++); |
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285 | |||
286 | if ((hi < 0) || (lo < 0)) |
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287 | return -1; |
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288 | |||
289 | *dst++ = (hi << 4) | lo; |
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290 | } |
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291 | return 0; |
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292 | } |
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293 | EXPORT_SYMBOL(hex2bin); |
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294 | |||
295 | /** |
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296 | * hex_dump_to_buffer - convert a blob of data to "hex ASCII" in memory |
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297 | * @buf: data blob to dump |
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298 | * @len: number of bytes in the @buf |
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299 | * @rowsize: number of bytes to print per line; must be 16 or 32 |
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300 | * @groupsize: number of bytes to print at a time (1, 2, 4, 8; default = 1) |
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301 | * @linebuf: where to put the converted data |
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302 | * @linebuflen: total size of @linebuf, including space for terminating NUL |
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303 | * @ascii: include ASCII after the hex output |
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304 | * |
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305 | * hex_dump_to_buffer() works on one "line" of output at a time, i.e., |
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306 | * 16 or 32 bytes of input data converted to hex + ASCII output. |
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307 | * |
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308 | * Given a buffer of u8 data, hex_dump_to_buffer() converts the input data |
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309 | * to a hex + ASCII dump at the supplied memory location. |
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310 | * The converted output is always NUL-terminated. |
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311 | * |
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312 | * E.g.: |
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313 | * hex_dump_to_buffer(frame->data, frame->len, 16, 1, |
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314 | * linebuf, sizeof(linebuf), true); |
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315 | * |
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316 | * example output buffer: |
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317 | * 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f @ABCDEFGHIJKLMNO |
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318 | */ |
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6084 | serge | 319 | int hex_dump_to_buffer(const void *buf, size_t len, int rowsize, int groupsize, |
320 | char *linebuf, size_t linebuflen, bool ascii) |
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3480 | Serge | 321 | { |
322 | const u8 *ptr = buf; |
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6084 | serge | 323 | int ngroups; |
3480 | Serge | 324 | u8 ch; |
325 | int j, lx = 0; |
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326 | int ascii_column; |
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6084 | serge | 327 | int ret; |
3480 | Serge | 328 | |
329 | if (rowsize != 16 && rowsize != 32) |
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330 | rowsize = 16; |
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331 | |||
332 | if (len > rowsize) /* limit to one line at a time */ |
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333 | len = rowsize; |
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6084 | serge | 334 | if (!is_power_of_2(groupsize) || groupsize > 8) |
335 | groupsize = 1; |
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3480 | Serge | 336 | if ((len % groupsize) != 0) /* no mixed size output */ |
337 | groupsize = 1; |
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338 | |||
6084 | serge | 339 | ngroups = len / groupsize; |
340 | ascii_column = rowsize * 2 + rowsize / groupsize + 1; |
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341 | |||
342 | if (!linebuflen) |
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343 | goto overflow1; |
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344 | |||
345 | if (!len) |
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346 | goto nil; |
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347 | |||
348 | if (groupsize == 8) { |
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3480 | Serge | 349 | const u64 *ptr8 = buf; |
350 | |||
6084 | serge | 351 | for (j = 0; j < ngroups; j++) { |
352 | ret = snprintf(linebuf + lx, linebuflen - lx, |
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353 | "%s%16.16llx", j ? " " : "", |
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354 | (unsigned long long)*(ptr8 + j)); |
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355 | if (ret >= linebuflen - lx) |
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356 | goto overflow1; |
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357 | lx += ret; |
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358 | } |
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359 | } else if (groupsize == 4) { |
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3480 | Serge | 360 | const u32 *ptr4 = buf; |
361 | |||
6084 | serge | 362 | for (j = 0; j < ngroups; j++) { |
363 | ret = snprintf(linebuf + lx, linebuflen - lx, |
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364 | "%s%8.8x", j ? " " : "", |
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365 | *(ptr4 + j)); |
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366 | if (ret >= linebuflen - lx) |
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367 | goto overflow1; |
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368 | lx += ret; |
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369 | } |
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370 | } else if (groupsize == 2) { |
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3480 | Serge | 371 | const u16 *ptr2 = buf; |
372 | |||
6084 | serge | 373 | for (j = 0; j < ngroups; j++) { |
374 | ret = snprintf(linebuf + lx, linebuflen - lx, |
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375 | "%s%4.4x", j ? " " : "", |
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376 | *(ptr2 + j)); |
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377 | if (ret >= linebuflen - lx) |
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378 | goto overflow1; |
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379 | lx += ret; |
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380 | } |
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381 | } else { |
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382 | for (j = 0; j < len; j++) { |
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383 | if (linebuflen < lx + 3) |
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384 | goto overflow2; |
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3480 | Serge | 385 | ch = ptr[j]; |
386 | linebuf[lx++] = hex_asc_hi(ch); |
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387 | linebuf[lx++] = hex_asc_lo(ch); |
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388 | linebuf[lx++] = ' '; |
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389 | } |
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390 | if (j) |
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391 | lx--; |
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392 | } |
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393 | if (!ascii) |
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394 | goto nil; |
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395 | |||
6084 | serge | 396 | while (lx < ascii_column) { |
397 | if (linebuflen < lx + 2) |
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398 | goto overflow2; |
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3480 | Serge | 399 | linebuf[lx++] = ' '; |
6084 | serge | 400 | } |
401 | for (j = 0; j < len; j++) { |
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402 | if (linebuflen < lx + 2) |
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403 | goto overflow2; |
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3480 | Serge | 404 | ch = ptr[j]; |
405 | linebuf[lx++] = (isascii(ch) && isprint(ch)) ? ch : '.'; |
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406 | } |
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407 | nil: |
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6084 | serge | 408 | linebuf[lx] = '\0'; |
409 | return lx; |
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410 | overflow2: |
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3480 | Serge | 411 | linebuf[lx++] = '\0'; |
6084 | serge | 412 | overflow1: |
413 | return ascii ? ascii_column + len : (groupsize * 2 + 1) * ngroups - 1; |
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3480 | Serge | 414 | } |
415 | /** |
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416 | * print_hex_dump - print a text hex dump to syslog for a binary blob of data |
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417 | * @level: kernel log level (e.g. KERN_DEBUG) |
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418 | * @prefix_str: string to prefix each line with; |
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419 | * caller supplies trailing spaces for alignment if desired |
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420 | * @prefix_type: controls whether prefix of an offset, address, or none |
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421 | * is printed (%DUMP_PREFIX_OFFSET, %DUMP_PREFIX_ADDRESS, %DUMP_PREFIX_NONE) |
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422 | * @rowsize: number of bytes to print per line; must be 16 or 32 |
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423 | * @groupsize: number of bytes to print at a time (1, 2, 4, 8; default = 1) |
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424 | * @buf: data blob to dump |
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425 | * @len: number of bytes in the @buf |
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426 | * @ascii: include ASCII after the hex output |
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427 | * |
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428 | * Given a buffer of u8 data, print_hex_dump() prints a hex + ASCII dump |
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429 | * to the kernel log at the specified kernel log level, with an optional |
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430 | * leading prefix. |
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431 | * |
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432 | * print_hex_dump() works on one "line" of output at a time, i.e., |
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433 | * 16 or 32 bytes of input data converted to hex + ASCII output. |
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434 | * print_hex_dump() iterates over the entire input @buf, breaking it into |
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435 | * "line size" chunks to format and print. |
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436 | * |
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437 | * E.g.: |
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438 | * print_hex_dump(KERN_DEBUG, "raw data: ", DUMP_PREFIX_ADDRESS, |
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439 | * 16, 1, frame->data, frame->len, true); |
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440 | * |
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441 | * Example output using %DUMP_PREFIX_OFFSET and 1-byte mode: |
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442 | * 0009ab42: 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f @ABCDEFGHIJKLMNO |
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443 | * Example output using %DUMP_PREFIX_ADDRESS and 4-byte mode: |
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444 | * ffffffff88089af0: 73727170 77767574 7b7a7978 7f7e7d7c pqrstuvwxyz{|}~. |
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445 | */ |
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446 | void print_hex_dump(const char *level, const char *prefix_str, int prefix_type, |
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447 | int rowsize, int groupsize, |
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448 | const void *buf, size_t len, bool ascii) |
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449 | { |
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450 | const u8 *ptr = buf; |
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451 | int i, linelen, remaining = len; |
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452 | unsigned char linebuf[32 * 3 + 2 + 32 + 1]; |
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453 | |||
454 | if (rowsize != 16 && rowsize != 32) |
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455 | rowsize = 16; |
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456 | |||
457 | for (i = 0; i < len; i += rowsize) { |
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458 | linelen = min(remaining, rowsize); |
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459 | remaining -= rowsize; |
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460 | |||
461 | hex_dump_to_buffer(ptr + i, linelen, rowsize, groupsize, |
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462 | linebuf, sizeof(linebuf), ascii); |
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463 | |||
464 | switch (prefix_type) { |
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465 | case DUMP_PREFIX_ADDRESS: |
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466 | printk("%s%s%p: %s\n", |
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467 | level, prefix_str, ptr + i, linebuf); |
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468 | break; |
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469 | case DUMP_PREFIX_OFFSET: |
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470 | printk("%s%s%.8x: %s\n", level, prefix_str, i, linebuf); |
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471 | break; |
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472 | default: |
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473 | printk("%s%s%s\n", level, prefix_str, linebuf); |
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474 | break; |
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475 | } |
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476 | } |
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477 | } |
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478 | |||
479 | void print_hex_dump_bytes(const char *prefix_str, int prefix_type, |
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480 | const void *buf, size_t len) |
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481 | { |
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482 | print_hex_dump(KERN_DEBUG, prefix_str, prefix_type, 16, 1, |
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483 | buf, len, true); |
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484 | } |
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485 | |||
4104 | Serge | 486 | void *kmemdup(const void *src, size_t len, gfp_t gfp) |
487 | { |
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488 | void *p; |
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3480 | Serge | 489 | |
4104 | Serge | 490 | p = kmalloc(len, gfp); |
491 | if (p) |
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492 | memcpy(p, src, len); |
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493 | return p; |
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494 | } |
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495 | |||
496 | |||
5354 | serge | 497 | #define KMAP_MAX 256 |
5060 | serge | 498 | |
5354 | serge | 499 | static struct mutex kmap_mutex; |
500 | static struct page* kmap_table[KMAP_MAX]; |
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501 | static int kmap_av; |
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502 | static int kmap_first; |
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503 | static void* kmap_base; |
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504 | |||
505 | |||
506 | int kmap_init() |
||
507 | { |
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508 | kmap_base = AllocKernelSpace(KMAP_MAX*4096); |
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509 | if(kmap_base == NULL) |
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510 | return -1; |
||
511 | |||
512 | kmap_av = KMAP_MAX; |
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513 | MutexInit(&kmap_mutex); |
||
514 | return 0; |
||
515 | }; |
||
516 | |||
5060 | serge | 517 | void *kmap(struct page *page) |
518 | { |
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5354 | serge | 519 | void *vaddr = NULL; |
520 | int i; |
||
521 | |||
522 | do |
||
523 | { |
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524 | MutexLock(&kmap_mutex); |
||
525 | if(kmap_av != 0) |
||
526 | { |
||
527 | for(i = kmap_first; i < KMAP_MAX; i++) |
||
528 | { |
||
529 | if(kmap_table[i] == NULL) |
||
530 | { |
||
531 | kmap_av--; |
||
532 | kmap_first = i; |
||
533 | kmap_table[i] = page; |
||
534 | vaddr = kmap_base + (i<<12); |
||
535 | MapPage(vaddr,(addr_t)page,3); |
||
536 | break; |
||
537 | }; |
||
538 | }; |
||
539 | }; |
||
540 | MutexUnlock(&kmap_mutex); |
||
541 | }while(vaddr == NULL); |
||
542 | |||
543 | return vaddr; |
||
544 | }; |
||
545 | |||
546 | void *kmap_atomic(struct page *page) __attribute__ ((alias ("kmap"))); |
||
547 | |||
548 | void kunmap(struct page *page) |
||
549 | { |
||
5060 | serge | 550 | void *vaddr; |
5354 | serge | 551 | int i; |
5060 | serge | 552 | |
5354 | serge | 553 | MutexLock(&kmap_mutex); |
5060 | serge | 554 | |
5354 | serge | 555 | for(i = 0; i < KMAP_MAX; i++) |
556 | { |
||
557 | if(kmap_table[i] == page) |
||
558 | { |
||
559 | kmap_av++; |
||
560 | if(i < kmap_first) |
||
561 | kmap_first = i; |
||
562 | kmap_table[i] = NULL; |
||
563 | vaddr = kmap_base + (i<<12); |
||
564 | MapPage(vaddr,0,0); |
||
565 | break; |
||
566 | }; |
||
567 | }; |
||
568 | |||
569 | MutexUnlock(&kmap_mutex); |
||
570 | }; |
||
571 | |||
572 | void kunmap_atomic(void *vaddr) |
||
573 | { |
||
574 | int i; |
||
575 | |||
576 | MapPage(vaddr,0,0); |
||
577 | |||
578 | i = (vaddr - kmap_base) >> 12; |
||
579 | |||
580 | MutexLock(&kmap_mutex); |
||
581 | |||
582 | kmap_av++; |
||
583 | if(i < kmap_first) |
||
584 | kmap_first = i; |
||
585 | kmap_table[i] = NULL; |
||
586 | |||
587 | MutexUnlock(&kmap_mutex); |
||
5060 | serge | 588 | } |
589 | |||
5354 | serge | 590 | size_t strlcat(char *dest, const char *src, size_t count) |
5060 | serge | 591 | { |
5354 | serge | 592 | size_t dsize = strlen(dest); |
593 | size_t len = strlen(src); |
||
594 | size_t res = dsize + len; |
||
5060 | serge | 595 | |
5354 | serge | 596 | /* This would be a bug */ |
597 | BUG_ON(dsize >= count); |
||
5060 | serge | 598 | |
5354 | serge | 599 | dest += dsize; |
600 | count -= dsize; |
||
601 | if (len >= count) |
||
602 | len = count-1; |
||
603 | memcpy(dest, src, len); |
||
604 | dest[len] = 0; |
||
605 | return res; |
||
5060 | serge | 606 | } |
5354 | serge | 607 | EXPORT_SYMBOL(strlcat); |
5060 | serge | 608 | |
5354 | serge | 609 | void msleep(unsigned int msecs) |
610 | { |
||
611 | msecs /= 10; |
||
612 | if(!msecs) msecs = 1; |
||
613 | |||
614 | __asm__ __volatile__ ( |
||
615 | "call *__imp__Delay" |
||
616 | ::"b" (msecs)); |
||
617 | __asm__ __volatile__ ( |
||
618 | "":::"ebx"); |
||
619 | |||
620 | }; |
||
621 | |||
622 | |||
623 | /* simple loop based delay: */ |
||
624 | static void delay_loop(unsigned long loops) |
||
625 | { |
||
626 | asm volatile( |
||
627 | " test %0,%0 \n" |
||
628 | " jz 3f \n" |
||
629 | " jmp 1f \n" |
||
630 | |||
631 | ".align 16 \n" |
||
632 | "1: jmp 2f \n" |
||
633 | |||
634 | ".align 16 \n" |
||
635 | "2: dec %0 \n" |
||
636 | " jnz 2b \n" |
||
637 | "3: dec %0 \n" |
||
638 | |||
639 | : /* we don't need output */ |
||
640 | :"a" (loops) |
||
641 | ); |
||
642 | } |
||
643 | |||
644 | |||
645 | static void (*delay_fn)(unsigned long) = delay_loop; |
||
646 | |||
647 | void __delay(unsigned long loops) |
||
648 | { |
||
649 | delay_fn(loops); |
||
650 | } |
||
651 | |||
652 | |||
653 | inline void __const_udelay(unsigned long xloops) |
||
654 | { |
||
655 | int d0; |
||
656 | |||
657 | xloops *= 4; |
||
658 | asm("mull %%edx" |
||
659 | : "=d" (xloops), "=&a" (d0) |
||
660 | : "1" (xloops), "" |
||
661 | (loops_per_jiffy * (HZ/4))); |
||
662 | |||
663 | __delay(++xloops); |
||
664 | } |
||
665 | |||
666 | void __udelay(unsigned long usecs) |
||
667 | { |
||
668 | __const_udelay(usecs * 0x000010c7); /* 2**32 / 1000000 (rounded up) */ |
||
669 | } |
||
670 | |||
671 | unsigned int _sw_hweight32(unsigned int w) |
||
672 | { |
||
673 | #ifdef CONFIG_ARCH_HAS_FAST_MULTIPLIER |
||
674 | w -= (w >> 1) & 0x55555555; |
||
675 | w = (w & 0x33333333) + ((w >> 2) & 0x33333333); |
||
676 | w = (w + (w >> 4)) & 0x0f0f0f0f; |
||
677 | return (w * 0x01010101) >> 24; |
||
678 | #else |
||
679 | unsigned int res = w - ((w >> 1) & 0x55555555); |
||
680 | res = (res & 0x33333333) + ((res >> 2) & 0x33333333); |
||
681 | res = (res + (res >> 4)) & 0x0F0F0F0F; |
||
682 | res = res + (res >> 8); |
||
683 | return (res + (res >> 16)) & 0x000000FF; |
||
684 | #endif |
||
685 | } |
||
686 | EXPORT_SYMBOL(_sw_hweight32); |
||
687 | |||
688 | |||
689 | void usleep_range(unsigned long min, unsigned long max) |
||
690 | { |
||
691 | udelay(max); |
||
692 | } |
||
693 | EXPORT_SYMBOL(usleep_range); |
||
694 | |||
695 | |||
696 | static unsigned long round_jiffies_common(unsigned long j, int cpu, |
||
697 | bool force_up) |
||
698 | { |
||
699 | int rem; |
||
700 | unsigned long original = j; |
||
701 | |||
702 | /* |
||
703 | * We don't want all cpus firing their timers at once hitting the |
||
704 | * same lock or cachelines, so we skew each extra cpu with an extra |
||
705 | * 3 jiffies. This 3 jiffies came originally from the mm/ code which |
||
706 | * already did this. |
||
707 | * The skew is done by adding 3*cpunr, then round, then subtract this |
||
708 | * extra offset again. |
||
709 | */ |
||
710 | j += cpu * 3; |
||
711 | |||
712 | rem = j % HZ; |
||
713 | |||
714 | /* |
||
715 | * If the target jiffie is just after a whole second (which can happen |
||
716 | * due to delays of the timer irq, long irq off times etc etc) then |
||
717 | * we should round down to the whole second, not up. Use 1/4th second |
||
718 | * as cutoff for this rounding as an extreme upper bound for this. |
||
719 | * But never round down if @force_up is set. |
||
720 | */ |
||
721 | if (rem < HZ/4 && !force_up) /* round down */ |
||
722 | j = j - rem; |
||
723 | else /* round up */ |
||
724 | j = j - rem + HZ; |
||
725 | |||
726 | /* now that we have rounded, subtract the extra skew again */ |
||
727 | j -= cpu * 3; |
||
728 | |||
729 | /* |
||
730 | * Make sure j is still in the future. Otherwise return the |
||
731 | * unmodified value. |
||
732 | */ |
||
733 | return time_is_after_jiffies(j) ? j : original; |
||
734 | } |
||
735 | |||
736 | |||
737 | unsigned long round_jiffies_up_relative(unsigned long j, int cpu) |
||
738 | { |
||
739 | unsigned long j0 = jiffies; |
||
740 | |||
741 | /* Use j0 because jiffies might change while we run */ |
||
742 | return round_jiffies_common(j + j0, 0, true) - j0; |
||
743 | } |
||
744 | EXPORT_SYMBOL_GPL(__round_jiffies_up_relative); |
||
745 | |||
746 | |||
747 | #include |
||
748 | |||
749 | struct rcu_ctrlblk { |
||
750 | struct rcu_head *rcucblist; /* List of pending callbacks (CBs). */ |
||
751 | struct rcu_head **donetail; /* ->next pointer of last "done" CB. */ |
||
752 | struct rcu_head **curtail; /* ->next pointer of last CB. */ |
||
753 | // RCU_TRACE(long qlen); /* Number of pending CBs. */ |
||
754 | // RCU_TRACE(unsigned long gp_start); /* Start time for stalls. */ |
||
755 | // RCU_TRACE(unsigned long ticks_this_gp); /* Statistic for stalls. */ |
||
756 | // RCU_TRACE(unsigned long jiffies_stall); /* Jiffies at next stall. */ |
||
757 | // RCU_TRACE(const char *name); /* Name of RCU type. */ |
||
758 | }; |
||
759 | |||
760 | /* Definition for rcupdate control block. */ |
||
761 | static struct rcu_ctrlblk rcu_sched_ctrlblk = { |
||
762 | .donetail = &rcu_sched_ctrlblk.rcucblist, |
||
763 | .curtail = &rcu_sched_ctrlblk.rcucblist, |
||
764 | // RCU_TRACE(.name = "rcu_sched") |
||
765 | }; |
||
766 | |||
767 | static void __call_rcu(struct rcu_head *head, |
||
768 | void (*func)(struct rcu_head *rcu), |
||
769 | struct rcu_ctrlblk *rcp) |
||
770 | { |
||
771 | unsigned long flags; |
||
772 | |||
773 | // debug_rcu_head_queue(head); |
||
774 | head->func = func; |
||
775 | head->next = NULL; |
||
776 | |||
777 | local_irq_save(flags); |
||
778 | *rcp->curtail = head; |
||
779 | rcp->curtail = &head->next; |
||
780 | // RCU_TRACE(rcp->qlen++); |
||
781 | local_irq_restore(flags); |
||
782 | } |
||
783 | |||
784 | /* |
||
785 | * Post an RCU callback to be invoked after the end of an RCU-sched grace |
||
786 | * period. But since we have but one CPU, that would be after any |
||
787 | * quiescent state. |
||
788 | */ |
||
789 | void call_rcu_sched(struct rcu_head *head, void (*func)(struct rcu_head *rcu)) |
||
790 | { |
||
791 | __call_rcu(head, func, &rcu_sched_ctrlblk); |
||
792 | } |
||
793 | |||
6084 | serge | 794 | int seq_puts(struct seq_file *m, const char *s) |
795 | { |
||
796 | return 0; |
||
797 | }; |
||
5354 | serge | 798 | |
6084 | serge | 799 | __printf(2, 3) int seq_printf(struct seq_file *m, const char *f, ...) |
800 | { |
||
801 | return 0; |
||
802 | } |
||
5354 | serge | 803 | |
6084 | serge | 804 | |
805 | signed long |
||
806 | fence_wait_timeout(struct fence *fence, bool intr, signed long timeout) |
||
807 | { |
||
808 | signed long ret; |
||
809 | |||
810 | if (WARN_ON(timeout < 0)) |
||
811 | return -EINVAL; |
||
812 | |||
813 | // trace_fence_wait_start(fence); |
||
814 | ret = fence->ops->wait(fence, intr, timeout); |
||
815 | // trace_fence_wait_end(fence); |
||
816 | return ret; |
||
817 | } |
||
818 | |||
819 | void fence_release(struct kref *kref) |
||
820 | { |
||
821 | struct fence *fence = |
||
822 | container_of(kref, struct fence, refcount); |
||
823 | |||
824 | // trace_fence_destroy(fence); |
||
825 | |||
826 | BUG_ON(!list_empty(&fence->cb_list)); |
||
827 | |||
828 | if (fence->ops->release) |
||
829 | fence->ops->release(fence); |
||
830 | else |
||
831 | fence_free(fence); |
||
832 | } |
||
833 | |||
834 | void fence_free(struct fence *fence) |
||
835 | { |
||
836 | kfree_rcu(fence, rcu); |
||
837 | } |
||
838 | EXPORT_SYMBOL(fence_free); |
||
839 | |||
840 | |||
841 | ktime_t ktime_get(void) |
||
842 | { |
||
843 | ktime_t t; |
||
844 | |||
845 | t.tv64 = GetClockNs(); |
||
846 | |||
847 | return t; |
||
848 | }>>>12); |
||
849 |