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Rev | Author | Line No. | Line |
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1301 | jermar | 1 | /* |
2 | * The PCI Library -- ID to Name Translation |
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3 | * |
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4 | * Copyright (c) 1997--2005 Martin Mares <mj@ucw.cz> |
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5 | * |
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6 | * Modified and ported to HelenOS by Jakub Jermar. |
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7 | * |
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8 | * Can be freely distributed and used under the terms of the GNU GPL. |
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9 | */ |
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10 | |||
11 | #include <stdio.h> |
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12 | #include <stdlib.h> |
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13 | #include <stdarg.h> |
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14 | #include <string.h> |
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15 | #include <errno.h> |
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16 | |||
17 | #include "internal.h" |
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18 | #include "pci_ids.h" |
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19 | |||
20 | struct id_entry { |
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1302 | jermar | 21 | struct id_entry *next; |
22 | u32 id12, id34; |
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23 | byte cat; |
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24 | byte name[1]; |
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1301 | jermar | 25 | }; |
26 | |||
27 | enum id_entry_type { |
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1302 | jermar | 28 | ID_UNKNOWN, |
29 | ID_VENDOR, |
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30 | ID_DEVICE, |
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31 | ID_SUBSYSTEM, |
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32 | ID_GEN_SUBSYSTEM, |
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33 | ID_CLASS, |
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34 | ID_SUBCLASS, |
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35 | ID_PROGIF |
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1301 | jermar | 36 | }; |
37 | |||
38 | struct id_bucket { |
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1302 | jermar | 39 | struct id_bucket *next; |
40 | unsigned int full; |
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1301 | jermar | 41 | }; |
42 | |||
43 | #define MAX_LINE 1024 |
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44 | #define BUCKET_SIZE 8192 |
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45 | #define HASH_SIZE 4099 |
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46 | |||
47 | #ifdef __GNUC__ |
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48 | #define BUCKET_ALIGNMENT __alignof__(struct id_bucket) |
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49 | #else |
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50 | union id_align { |
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1302 | jermar | 51 | struct id_bucket *next; |
52 | unsigned int full; |
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1301 | jermar | 53 | }; |
54 | #define BUCKET_ALIGNMENT sizeof(union id_align) |
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55 | #endif |
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56 | #define BUCKET_ALIGN(n) ((n)+BUCKET_ALIGNMENT-(n)%BUCKET_ALIGNMENT) |
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57 | |||
58 | static void *id_alloc(struct pci_access *a, unsigned int size) |
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59 | { |
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1302 | jermar | 60 | struct id_bucket *buck = a->current_id_bucket; |
61 | unsigned int pos; |
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62 | if (!buck || buck->full + size > BUCKET_SIZE) { |
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63 | buck = pci_malloc(a, BUCKET_SIZE); |
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64 | buck->next = a->current_id_bucket; |
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65 | a->current_id_bucket = buck; |
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66 | buck->full = BUCKET_ALIGN(sizeof(struct id_bucket)); |
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67 | } |
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68 | pos = buck->full; |
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69 | buck->full = BUCKET_ALIGN(buck->full + size); |
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70 | return (byte *) buck + pos; |
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1301 | jermar | 71 | } |
72 | |||
73 | static inline u32 id_pair(unsigned int x, unsigned int y) |
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74 | { |
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1302 | jermar | 75 | return ((x << 16) | y); |
1301 | jermar | 76 | } |
77 | |||
78 | static inline unsigned int id_hash(int cat, u32 id12, u32 id34) |
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79 | { |
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1302 | jermar | 80 | unsigned int h; |
1301 | jermar | 81 | |
1302 | jermar | 82 | h = id12 ^ (id34 << 3) ^ (cat << 5); |
83 | return h % HASH_SIZE; |
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1301 | jermar | 84 | } |
85 | |||
1302 | jermar | 86 | static struct id_entry *id_lookup(struct pci_access *a, int cat, int id1, |
87 | int id2, int id3, int id4) |
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1301 | jermar | 88 | { |
1302 | jermar | 89 | struct id_entry *n; |
90 | u32 id12 = id_pair(id1, id2); |
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91 | u32 id34 = id_pair(id3, id4); |
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1301 | jermar | 92 | |
1302 | jermar | 93 | n = a->id_hash[id_hash(cat, id12, id34)]; |
94 | while (n && (n->id12 != id12 || n->id34 != id34 || n->cat != cat)) |
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95 | n = n->next; |
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96 | return n; |
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1301 | jermar | 97 | } |
98 | |||
1302 | jermar | 99 | static int id_insert(struct pci_access *a, int cat, int id1, int id2, |
100 | int id3, int id4, byte * text) |
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1301 | jermar | 101 | { |
1302 | jermar | 102 | u32 id12 = id_pair(id1, id2); |
103 | u32 id34 = id_pair(id3, id4); |
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104 | unsigned int h = id_hash(cat, id12, id34); |
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105 | struct id_entry *n = a->id_hash[h]; |
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106 | int len = strlen((char *) text); |
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1301 | jermar | 107 | |
1302 | jermar | 108 | while (n && (n->id12 != id12 || n->id34 != id34 || n->cat != cat)) |
109 | n = n->next; |
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110 | if (n) |
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111 | return 1; |
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112 | n = id_alloc(a, sizeof(struct id_entry) + len); |
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113 | n->id12 = id12; |
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114 | n->id34 = id34; |
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115 | n->cat = cat; |
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116 | memcpy(n->name, text, len + 1); |
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117 | n->next = a->id_hash[h]; |
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118 | a->id_hash[h] = n; |
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119 | return 0; |
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1301 | jermar | 120 | } |
121 | |||
1302 | jermar | 122 | static int id_hex(byte * p, int cnt) |
1301 | jermar | 123 | { |
1302 | jermar | 124 | int x = 0; |
125 | while (cnt--) { |
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126 | x <<= 4; |
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127 | if (*p >= '0' && *p <= '9') |
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128 | x += (*p - '0'); |
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129 | else if (*p >= 'a' && *p <= 'f') |
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130 | x += (*p - 'a' + 10); |
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131 | else if (*p >= 'A' && *p <= 'F') |
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132 | x += (*p - 'A' + 10); |
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133 | else |
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134 | return -1; |
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135 | p++; |
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136 | } |
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137 | return x; |
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1301 | jermar | 138 | } |
139 | |||
140 | static inline int id_white_p(int c) |
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141 | { |
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1302 | jermar | 142 | return (c == ' ') || (c == '\t'); |
1301 | jermar | 143 | } |
144 | |||
145 | static const char *id_parse_list(struct pci_access *a, int *lino) |
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146 | { |
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1302 | jermar | 147 | byte *line; |
148 | byte *p; |
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149 | int id1 = 0, id2 = 0, id3 = 0, id4 = 0; |
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150 | int cat = -1; |
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151 | int nest; |
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152 | static const char parse_error[] = "Parse error"; |
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153 | int i; |
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1301 | jermar | 154 | |
1302 | jermar | 155 | *lino = 0; |
156 | for (i = 0; i < sizeof(pci_ids) / sizeof(char *); i++) { |
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157 | line = (byte *) pci_ids[i]; |
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158 | (*lino)++; |
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159 | p = line; |
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160 | while (*p) |
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161 | p++; |
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162 | if (p > line && (p[-1] == ' ' || p[-1] == '\t')) |
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163 | *--p = 0; |
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1301 | jermar | 164 | |
1302 | jermar | 165 | p = line; |
166 | while (id_white_p(*p)) |
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167 | p++; |
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168 | if (!*p || *p == '#') |
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169 | continue; |
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1301 | jermar | 170 | |
1302 | jermar | 171 | p = line; |
172 | while (*p == '\t') |
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173 | p++; |
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174 | nest = p - line; |
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1301 | jermar | 175 | |
1302 | jermar | 176 | if (!nest) { /* Top-level entries */ |
177 | if (p[0] == 'C' && p[1] == ' ') { /* Class block */ |
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178 | if ((id1 = id_hex(p + 2, 2)) < 0 |
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179 | || !id_white_p(p[4])) |
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180 | return parse_error; |
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181 | cat = ID_CLASS; |
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182 | p += 5; |
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183 | } else if (p[0] == 'S' && p[1] == ' ') { /* Generic subsystem block */ |
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184 | if ((id1 = id_hex(p + 2, 4)) < 0 || p[6]) |
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185 | return parse_error; |
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186 | if (!id_lookup(a, ID_VENDOR, id1, 0, 0, 0)) |
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187 | return "Vendor does not exist"; |
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188 | cat = ID_GEN_SUBSYSTEM; |
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189 | continue; |
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190 | } else if (p[0] >= 'A' && p[0] <= 'Z' && p[1] == ' ') { /* Unrecognized block (RFU) */ |
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191 | cat = ID_UNKNOWN; |
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192 | continue; |
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193 | } else { /* Vendor ID */ |
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194 | |||
195 | if ((id1 = id_hex(p, 4)) < 0 |
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196 | || !id_white_p(p[4])) |
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197 | return parse_error; |
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198 | cat = ID_VENDOR; |
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199 | p += 5; |
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200 | } |
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201 | id2 = id3 = id4 = 0; |
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202 | } else if (cat == ID_UNKNOWN) /* Nested entries in RFU blocks are skipped */ |
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203 | continue; |
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204 | else if (nest == 1) /* Nesting level 1 */ |
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205 | switch (cat) { |
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206 | case ID_VENDOR: |
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207 | case ID_DEVICE: |
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208 | case ID_SUBSYSTEM: |
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209 | if ((id2 = id_hex(p, 4)) < 0 |
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210 | || !id_white_p(p[4])) |
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211 | return parse_error; |
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212 | p += 5; |
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213 | cat = ID_DEVICE; |
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214 | id3 = id4 = 0; |
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215 | break; |
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216 | case ID_GEN_SUBSYSTEM: |
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217 | if ((id2 = id_hex(p, 4)) < 0 |
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218 | || !id_white_p(p[4])) |
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219 | return parse_error; |
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220 | p += 5; |
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221 | id3 = id4 = 0; |
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222 | break; |
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223 | case ID_CLASS: |
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224 | case ID_SUBCLASS: |
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225 | case ID_PROGIF: |
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226 | if ((id2 = id_hex(p, 2)) < 0 |
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227 | || !id_white_p(p[2])) |
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228 | return parse_error; |
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229 | p += 3; |
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230 | cat = ID_SUBCLASS; |
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231 | id3 = id4 = 0; |
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232 | break; |
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233 | default: |
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234 | return parse_error; |
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235 | } else if (nest == 2) /* Nesting level 2 */ |
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236 | switch (cat) { |
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237 | case ID_DEVICE: |
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238 | case ID_SUBSYSTEM: |
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239 | if ((id3 = id_hex(p, 4)) < 0 |
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240 | || !id_white_p(p[4]) |
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241 | || (id4 = id_hex(p + 5, 4)) < 0 |
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242 | || !id_white_p(p[9])) |
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243 | return parse_error; |
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244 | p += 10; |
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245 | cat = ID_SUBSYSTEM; |
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246 | break; |
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247 | case ID_CLASS: |
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248 | case ID_SUBCLASS: |
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249 | case ID_PROGIF: |
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250 | if ((id3 = id_hex(p, 2)) < 0 |
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251 | || !id_white_p(p[2])) |
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252 | return parse_error; |
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253 | p += 3; |
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254 | cat = ID_PROGIF; |
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255 | id4 = 0; |
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256 | break; |
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257 | default: |
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258 | return parse_error; |
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259 | } else /* Nesting level 3 or more */ |
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260 | return parse_error; |
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261 | while (id_white_p(*p)) |
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262 | p++; |
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263 | if (!*p) |
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264 | return parse_error; |
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265 | if (id_insert(a, cat, id1, id2, id3, id4, p)) |
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266 | return "Duplicate entry"; |
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1301 | jermar | 267 | } |
1302 | jermar | 268 | return NULL; |
1301 | jermar | 269 | } |
270 | |||
1302 | jermar | 271 | int pci_load_name_list(struct pci_access *a) |
1301 | jermar | 272 | { |
1302 | jermar | 273 | int lino; |
274 | const char *err; |
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1301 | jermar | 275 | |
1302 | jermar | 276 | pci_free_name_list(a); |
277 | a->id_hash = pci_malloc(a, sizeof(struct id_entry *) * HASH_SIZE); |
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278 | bzero(a->id_hash, sizeof(struct id_entry *) * HASH_SIZE); |
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279 | err = id_parse_list(a, &lino); |
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280 | if (err) |
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281 | a->error("%s at %s, element %d\n", err, "pci_ids.h", lino); |
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282 | return 1; |
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1301 | jermar | 283 | } |
284 | |||
1302 | jermar | 285 | void pci_free_name_list(struct pci_access *a) |
1301 | jermar | 286 | { |
1302 | jermar | 287 | pci_mfree(a->id_hash); |
288 | a->id_hash = NULL; |
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289 | while (a->current_id_bucket) { |
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290 | struct id_bucket *buck = a->current_id_bucket; |
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291 | a->current_id_bucket = buck->next; |
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292 | pci_mfree(buck); |
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293 | } |
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1301 | jermar | 294 | } |
295 | |||
1302 | jermar | 296 | static struct id_entry *id_lookup_subsys(struct pci_access *a, int iv, |
297 | int id, int isv, int isd) |
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1301 | jermar | 298 | { |
1302 | jermar | 299 | struct id_entry *d = NULL; |
300 | if (iv > 0 && id > 0) /* Per-device lookup */ |
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301 | d = id_lookup(a, ID_SUBSYSTEM, iv, id, isv, isd); |
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302 | if (!d) /* Generic lookup */ |
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303 | d = id_lookup(a, ID_GEN_SUBSYSTEM, isv, isd, 0, 0); |
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304 | if (!d && iv == isv && id == isd) /* Check for subsystem == device */ |
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305 | d = id_lookup(a, ID_DEVICE, iv, id, 0, 0); |
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306 | return d; |
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1301 | jermar | 307 | } |
308 | |||
1302 | jermar | 309 | char *pci_lookup_name(struct pci_access *a, char *buf, int size, int flags, |
310 | ...) |
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1301 | jermar | 311 | { |
1302 | jermar | 312 | va_list args; |
313 | int num, res, synth; |
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314 | struct id_entry *v, *d, *cls, *pif; |
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315 | int iv, id, isv, isd, icls, ipif; |
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1301 | jermar | 316 | |
1302 | jermar | 317 | va_start(args, flags); |
1301 | jermar | 318 | |
1302 | jermar | 319 | num = 0; |
320 | if ((flags & PCI_LOOKUP_NUMERIC) || a->numeric_ids) { |
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321 | flags &= ~PCI_LOOKUP_NUMERIC; |
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322 | num = 1; |
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323 | } else if (!a->id_hash) { |
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324 | if (!pci_load_name_list(a)) |
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325 | num = a->numeric_ids = 1; |
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326 | } |
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1301 | jermar | 327 | |
1302 | jermar | 328 | if (flags & PCI_LOOKUP_NO_NUMBERS) { |
329 | flags &= ~PCI_LOOKUP_NO_NUMBERS; |
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330 | synth = 0; |
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331 | if (num) |
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332 | return NULL; |
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333 | } else |
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334 | synth = 1; |
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1301 | jermar | 335 | |
1302 | jermar | 336 | switch (flags) { |
337 | case PCI_LOOKUP_VENDOR: |
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338 | iv = va_arg(args, int); |
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339 | if (num) |
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340 | res = snprintf(buf, size, "%04x", iv); |
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341 | else if (v = id_lookup(a, ID_VENDOR, iv, 0, 0, 0)) |
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342 | return (char *) v->name; |
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343 | else |
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344 | res = |
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345 | snprintf(buf, size, "Unknown vendor %04x", iv); |
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346 | break; |
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347 | case PCI_LOOKUP_DEVICE: |
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348 | iv = va_arg(args, int); |
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349 | id = va_arg(args, int); |
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350 | if (num) |
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351 | res = snprintf(buf, size, "%04x", id); |
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352 | else if (d = id_lookup(a, ID_DEVICE, iv, id, 0, 0)) |
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353 | return (char *) d->name; |
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354 | else if (synth) |
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355 | res = |
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356 | snprintf(buf, size, "Unknown device %04x", id); |
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357 | else |
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358 | return NULL; |
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359 | break; |
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360 | case PCI_LOOKUP_VENDOR | PCI_LOOKUP_DEVICE: |
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361 | iv = va_arg(args, int); |
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362 | id = va_arg(args, int); |
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363 | if (num) |
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364 | res = snprintf(buf, size, "%04x:%04x", iv, id); |
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365 | else { |
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366 | v = id_lookup(a, ID_VENDOR, iv, 0, 0, 0); |
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367 | d = id_lookup(a, ID_DEVICE, iv, id, 0, 0); |
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368 | if (v && d) |
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369 | res = |
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370 | snprintf(buf, size, "%s %s", v->name, |
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371 | d->name); |
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372 | else if (!synth) |
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373 | return NULL; |
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374 | else if (!v) |
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375 | res = |
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376 | snprintf(buf, size, |
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377 | "Unknown device %04x:%04x", |
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378 | iv, id); |
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379 | else /* !d */ |
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380 | res = |
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381 | snprintf(buf, size, |
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382 | "%s Unknown device %04x", |
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383 | v->name, id); |
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384 | } |
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385 | break; |
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386 | case PCI_LOOKUP_SUBSYSTEM | PCI_LOOKUP_VENDOR: |
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387 | isv = va_arg(args, int); |
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388 | if (num) |
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389 | res = snprintf(buf, size, "%04x", isv); |
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390 | else if (v = id_lookup(a, ID_VENDOR, isv, 0, 0, 0)) |
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391 | return (char *) v->name; |
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392 | else if (synth) |
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393 | res = |
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394 | snprintf(buf, size, "Unknown vendor %04x", |
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395 | isv); |
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396 | else |
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397 | return NULL; |
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398 | break; |
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399 | case PCI_LOOKUP_SUBSYSTEM | PCI_LOOKUP_DEVICE: |
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400 | iv = va_arg(args, int); |
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401 | id = va_arg(args, int); |
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402 | isv = va_arg(args, int); |
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403 | isd = va_arg(args, int); |
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404 | if (num) |
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405 | res = snprintf(buf, size, "%04x", isd); |
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406 | else if (d = id_lookup_subsys(a, iv, id, isv, isd)) |
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407 | return (char *) d->name; |
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408 | else if (synth) |
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409 | res = |
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410 | snprintf(buf, size, "Unknown device %04x", |
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411 | isd); |
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412 | else |
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413 | return NULL; |
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414 | break; |
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415 | case PCI_LOOKUP_VENDOR | PCI_LOOKUP_DEVICE | PCI_LOOKUP_SUBSYSTEM: |
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416 | iv = va_arg(args, int); |
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417 | id = va_arg(args, int); |
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418 | isv = va_arg(args, int); |
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419 | isd = va_arg(args, int); |
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420 | if (num) |
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421 | res = snprintf(buf, size, "%04x:%04x", isv, isd); |
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422 | else { |
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423 | v = id_lookup(a, ID_VENDOR, isv, 0, 0, 0); |
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424 | d = id_lookup_subsys(a, iv, id, isv, isd); |
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425 | if (v && d) |
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426 | res = |
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427 | snprintf(buf, size, "%s %s", v->name, |
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428 | d->name); |
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429 | else if (!synth) |
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430 | return NULL; |
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431 | else if (!v) |
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432 | res = |
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433 | snprintf(buf, size, |
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434 | "Unknown device %04x:%04x", |
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435 | isv, isd); |
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436 | else /* !d */ |
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437 | res = |
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438 | snprintf(buf, size, |
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439 | "%s Unknown device %04x", |
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440 | v->name, isd); |
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441 | } |
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442 | break; |
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443 | case PCI_LOOKUP_CLASS: |
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444 | icls = va_arg(args, int); |
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445 | if (num) |
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446 | res = snprintf(buf, size, "%04x", icls); |
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447 | else if (cls = |
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448 | id_lookup(a, ID_SUBCLASS, icls >> 8, icls & 0xff, |
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449 | 0, 0)) |
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450 | return (char *) cls->name; |
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451 | else if (cls = id_lookup(a, ID_CLASS, icls, 0, 0, 0)) |
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452 | res = |
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453 | snprintf(buf, size, "%s [%04x]", cls->name, |
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454 | icls); |
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455 | else if (synth) |
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456 | res = snprintf(buf, size, "Class %04x", icls); |
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457 | else |
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458 | return NULL; |
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459 | break; |
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460 | case PCI_LOOKUP_PROGIF: |
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461 | icls = va_arg(args, int); |
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462 | ipif = va_arg(args, int); |
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463 | if (num) |
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464 | res = snprintf(buf, size, "%02x", ipif); |
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465 | else if (pif = |
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466 | id_lookup(a, ID_PROGIF, icls >> 8, icls & 0xff, |
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467 | ipif, 0)) |
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468 | return (char *) pif->name; |
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469 | else if (icls == 0x0101 && !(ipif & 0x70)) { |
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470 | /* IDE controllers have complex prog-if semantics */ |
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471 | res = snprintf(buf, size, "%s%s%s%s%s", |
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472 | (ipif & 0x80) ? "Master " : "", |
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473 | (ipif & 0x08) ? "SecP " : "", |
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474 | (ipif & 0x04) ? "SecO " : "", |
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475 | (ipif & 0x02) ? "PriP " : "", |
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476 | (ipif & 0x01) ? "PriO " : ""); |
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477 | if (res > 0 && res < size) |
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478 | buf[--res] = 0; |
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479 | } else if (synth) |
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480 | res = snprintf(buf, size, "ProgIf %02x", ipif); |
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481 | else |
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482 | return NULL; |
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483 | break; |
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484 | default: |
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485 | return "<pci_lookup_name: invalid request>"; |
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1301 | jermar | 486 | } |
1302 | jermar | 487 | if (res < 0 || res >= size) |
488 | return "<pci_lookup_name: buffer too small>"; |
||
489 | else |
||
490 | return buf; |
||
1301 | jermar | 491 | } |