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1301 jermar 1
/*
2
 *  The PCI Library -- ID to Name Translation
3
 *
4
 *  Copyright (c) 1997--2005 Martin Mares <mj@ucw.cz>
5
 *
1324 jermar 6
 *  May 8, 2006 - Modified and ported to HelenOS by Jakub Jermar.
1301 jermar 7
 *
8
 *  Can be freely distributed and used under the terms of the GNU GPL.
9
 */
10
 
11
#include <stdio.h>
12
#include <stdlib.h>
13
#include <stdarg.h>
14
#include <string.h>
15
#include <errno.h>
16
 
17
#include "internal.h"
18
#include "pci_ids.h"
19
 
20
struct id_entry {
1302 jermar 21
    struct id_entry *next;
22
    u32 id12, id34;
23
    byte cat;
24
    byte name[1];
1301 jermar 25
};
26
 
27
enum id_entry_type {
1302 jermar 28
    ID_UNKNOWN,
29
    ID_VENDOR,
30
    ID_DEVICE,
31
    ID_SUBSYSTEM,
32
    ID_GEN_SUBSYSTEM,
33
    ID_CLASS,
34
    ID_SUBCLASS,
35
    ID_PROGIF
1301 jermar 36
};
37
 
38
struct id_bucket {
1302 jermar 39
    struct id_bucket *next;
40
    unsigned int full;
1301 jermar 41
};
42
 
43
#define MAX_LINE 1024
44
#define BUCKET_SIZE 8192
45
#define HASH_SIZE 4099
46
 
47
#ifdef __GNUC__
48
#define BUCKET_ALIGNMENT __alignof__(struct id_bucket)
49
#else
50
union id_align {
1302 jermar 51
    struct id_bucket *next;
52
    unsigned int full;
1301 jermar 53
};
54
#define BUCKET_ALIGNMENT sizeof(union id_align)
55
#endif
56
#define BUCKET_ALIGN(n) ((n)+BUCKET_ALIGNMENT-(n)%BUCKET_ALIGNMENT)
57
 
58
static void *id_alloc(struct pci_access *a, unsigned int size)
59
{
1302 jermar 60
    struct id_bucket *buck = a->current_id_bucket;
61
    unsigned int pos;
62
    if (!buck || buck->full + size > BUCKET_SIZE) {
63
        buck = pci_malloc(a, BUCKET_SIZE);
64
        buck->next = a->current_id_bucket;
65
        a->current_id_bucket = buck;
66
        buck->full = BUCKET_ALIGN(sizeof(struct id_bucket));
67
    }
68
    pos = buck->full;
69
    buck->full = BUCKET_ALIGN(buck->full + size);
70
    return (byte *) buck + pos;
1301 jermar 71
}
72
 
73
static inline u32 id_pair(unsigned int x, unsigned int y)
74
{
1302 jermar 75
    return ((x << 16) | y);
1301 jermar 76
}
77
 
78
static inline unsigned int id_hash(int cat, u32 id12, u32 id34)
79
{
1302 jermar 80
    unsigned int h;
1301 jermar 81
 
1302 jermar 82
    h = id12 ^ (id34 << 3) ^ (cat << 5);
83
    return h % HASH_SIZE;
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)
1301 jermar 88
{
1302 jermar 89
    struct id_entry *n;
90
    u32 id12 = id_pair(id1, id2);
91
    u32 id34 = id_pair(id3, id4);
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))
95
        n = n->next;
96
    return n;
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)
1301 jermar 101
{
1302 jermar 102
    u32 id12 = id_pair(id1, id2);
103
    u32 id34 = id_pair(id3, id4);
104
    unsigned int h = id_hash(cat, id12, id34);
105
    struct id_entry *n = a->id_hash[h];
106
    int len = strlen((char *) text);
1301 jermar 107
 
1302 jermar 108
    while (n && (n->id12 != id12 || n->id34 != id34 || n->cat != cat))
109
        n = n->next;
110
    if (n)
111
        return 1;
112
    n = id_alloc(a, sizeof(struct id_entry) + len);
113
    n->id12 = id12;
114
    n->id34 = id34;
115
    n->cat = cat;
116
    memcpy(n->name, text, len + 1);
117
    n->next = a->id_hash[h];
118
    a->id_hash[h] = n;
119
    return 0;
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--) {
126
        x <<= 4;
127
        if (*p >= '0' && *p <= '9')
128
            x += (*p - '0');
129
        else if (*p >= 'a' && *p <= 'f')
130
            x += (*p - 'a' + 10);
131
        else if (*p >= 'A' && *p <= 'F')
132
            x += (*p - 'A' + 10);
133
        else
134
            return -1;
135
        p++;
136
    }
137
    return x;
1301 jermar 138
}
139
 
140
static inline int id_white_p(int c)
141
{
1302 jermar 142
    return (c == ' ') || (c == '\t');
1301 jermar 143
}
144
 
145
static const char *id_parse_list(struct pci_access *a, int *lino)
146
{
1302 jermar 147
    byte *line;
148
    byte *p;
149
    int id1 = 0, id2 = 0, id3 = 0, id4 = 0;
150
    int cat = -1;
151
    int nest;
152
    static const char parse_error[] = "Parse error";
153
    int i;
1301 jermar 154
 
1302 jermar 155
    *lino = 0;
156
    for (i = 0; i < sizeof(pci_ids) / sizeof(char *); i++) {
157
        line = (byte *) pci_ids[i];
158
        (*lino)++;
159
        p = line;
160
        while (*p)
161
            p++;
162
        if (p > line && (p[-1] == ' ' || p[-1] == '\t'))
163
            *--p = 0;
1301 jermar 164
 
1302 jermar 165
        p = line;
166
        while (id_white_p(*p))
167
            p++;
168
        if (!*p || *p == '#')
169
            continue;
1301 jermar 170
 
1302 jermar 171
        p = line;
172
        while (*p == '\t')
173
            p++;
174
        nest = p - line;
1301 jermar 175
 
1302 jermar 176
        if (!nest) {    /* Top-level entries */
177
            if (p[0] == 'C' && p[1] == ' ') {   /* Class block */
1324 jermar 178
                if ((id1 = id_hex(p + 2, 2)) < 0 || !id_white_p(p[4]))
1302 jermar 179
                    return parse_error;
180
                cat = ID_CLASS;
181
                p += 5;
182
            } else if (p[0] == 'S' && p[1] == ' ') {    /* Generic subsystem block */
183
                if ((id1 = id_hex(p + 2, 4)) < 0 || p[6])
184
                    return parse_error;
185
                if (!id_lookup(a, ID_VENDOR, id1, 0, 0, 0))
186
                    return "Vendor does not exist";
187
                cat = ID_GEN_SUBSYSTEM;
188
                continue;
189
            } else if (p[0] >= 'A' && p[0] <= 'Z' && p[1] == ' ') { /* Unrecognized block (RFU) */
190
                cat = ID_UNKNOWN;
191
                continue;
192
            } else {    /* Vendor ID */
193
 
1324 jermar 194
                if ((id1 = id_hex(p, 4)) < 0 || !id_white_p(p[4]))
1302 jermar 195
                    return parse_error;
196
                cat = ID_VENDOR;
197
                p += 5;
198
            }
199
            id2 = id3 = id4 = 0;
200
        } else if (cat == ID_UNKNOWN)   /* Nested entries in RFU blocks are skipped */
201
            continue;
202
        else if (nest == 1) /* Nesting level 1 */
203
            switch (cat) {
204
            case ID_VENDOR:
205
            case ID_DEVICE:
206
            case ID_SUBSYSTEM:
1324 jermar 207
                if ((id2 = id_hex(p, 4)) < 0 || !id_white_p(p[4]))
1302 jermar 208
                    return parse_error;
209
                p += 5;
210
                cat = ID_DEVICE;
211
                id3 = id4 = 0;
212
                break;
213
            case ID_GEN_SUBSYSTEM:
1324 jermar 214
                if ((id2 = id_hex(p, 4)) < 0 || !id_white_p(p[4]))
1302 jermar 215
                    return parse_error;
216
                p += 5;
217
                id3 = id4 = 0;
218
                break;
219
            case ID_CLASS:
220
            case ID_SUBCLASS:
221
            case ID_PROGIF:
1324 jermar 222
                if ((id2 = id_hex(p, 2)) < 0 || !id_white_p(p[2]))
1302 jermar 223
                    return parse_error;
224
                p += 3;
225
                cat = ID_SUBCLASS;
226
                id3 = id4 = 0;
227
                break;
228
            default:
229
                return parse_error;
230
        } else if (nest == 2)   /* Nesting level 2 */
231
            switch (cat) {
232
            case ID_DEVICE:
233
            case ID_SUBSYSTEM:
1324 jermar 234
                if ((id3 = id_hex(p, 4)) < 0 || !id_white_p(p[4])
235
                    || (id4 = id_hex(p + 5, 4)) < 0 || !id_white_p(p[9]))
1302 jermar 236
                    return parse_error;
237
                p += 10;
238
                cat = ID_SUBSYSTEM;
239
                break;
240
            case ID_CLASS:
241
            case ID_SUBCLASS:
242
            case ID_PROGIF:
1324 jermar 243
                if ((id3 = id_hex(p, 2)) < 0 || !id_white_p(p[2]))
1302 jermar 244
                    return parse_error;
245
                p += 3;
246
                cat = ID_PROGIF;
247
                id4 = 0;
248
                break;
249
            default:
250
                return parse_error;
251
        } else      /* Nesting level 3 or more */
252
            return parse_error;
253
        while (id_white_p(*p))
254
            p++;
255
        if (!*p)
256
            return parse_error;
257
        if (id_insert(a, cat, id1, id2, id3, id4, p))
258
            return "Duplicate entry";
1301 jermar 259
    }
1302 jermar 260
    return NULL;
1301 jermar 261
}
262
 
1302 jermar 263
int pci_load_name_list(struct pci_access *a)
1301 jermar 264
{
1302 jermar 265
    int lino;
266
    const char *err;
1301 jermar 267
 
1302 jermar 268
    pci_free_name_list(a);
269
    a->id_hash = pci_malloc(a, sizeof(struct id_entry *) * HASH_SIZE);
270
    bzero(a->id_hash, sizeof(struct id_entry *) * HASH_SIZE);
271
    err = id_parse_list(a, &lino);
272
    if (err)
273
        a->error("%s at %s, element %d\n", err, "pci_ids.h", lino);
274
    return 1;
1301 jermar 275
}
276
 
1302 jermar 277
void pci_free_name_list(struct pci_access *a)
1301 jermar 278
{
1302 jermar 279
    pci_mfree(a->id_hash);
280
    a->id_hash = NULL;
281
    while (a->current_id_bucket) {
282
        struct id_bucket *buck = a->current_id_bucket;
283
        a->current_id_bucket = buck->next;
284
        pci_mfree(buck);
285
    }
1301 jermar 286
}
287
 
1302 jermar 288
static struct id_entry *id_lookup_subsys(struct pci_access *a, int iv,
289
                     int id, int isv, int isd)
1301 jermar 290
{
1302 jermar 291
    struct id_entry *d = NULL;
292
    if (iv > 0 && id > 0)   /* Per-device lookup */
293
        d = id_lookup(a, ID_SUBSYSTEM, iv, id, isv, isd);
294
    if (!d)         /* Generic lookup */
295
        d = id_lookup(a, ID_GEN_SUBSYSTEM, isv, isd, 0, 0);
296
    if (!d && iv == isv && id == isd)   /* Check for subsystem == device */
297
        d = id_lookup(a, ID_DEVICE, iv, id, 0, 0);
298
    return d;
1301 jermar 299
}
300
 
1302 jermar 301
char *pci_lookup_name(struct pci_access *a, char *buf, int size, int flags,
302
              ...)
1301 jermar 303
{
1302 jermar 304
    va_list args;
305
    int num, res, synth;
306
    struct id_entry *v, *d, *cls, *pif;
307
    int iv, id, isv, isd, icls, ipif;
1301 jermar 308
 
1302 jermar 309
    va_start(args, flags);
1301 jermar 310
 
1302 jermar 311
    num = 0;
312
    if ((flags & PCI_LOOKUP_NUMERIC) || a->numeric_ids) {
313
        flags &= ~PCI_LOOKUP_NUMERIC;
314
        num = 1;
315
    } else if (!a->id_hash) {
316
        if (!pci_load_name_list(a))
317
            num = a->numeric_ids = 1;
318
    }
1301 jermar 319
 
1302 jermar 320
    if (flags & PCI_LOOKUP_NO_NUMBERS) {
321
        flags &= ~PCI_LOOKUP_NO_NUMBERS;
322
        synth = 0;
323
        if (num)
324
            return NULL;
325
    } else
326
        synth = 1;
1301 jermar 327
 
1302 jermar 328
    switch (flags) {
329
    case PCI_LOOKUP_VENDOR:
330
        iv = va_arg(args, int);
331
        if (num)
332
            res = snprintf(buf, size, "%04x", iv);
333
        else if (v = id_lookup(a, ID_VENDOR, iv, 0, 0, 0))
334
            return (char *) v->name;
335
        else
1324 jermar 336
            res = snprintf(buf, size, "Unknown vendor %04x", iv);
1302 jermar 337
        break;
338
    case PCI_LOOKUP_DEVICE:
339
        iv = va_arg(args, int);
340
        id = va_arg(args, int);
341
        if (num)
342
            res = snprintf(buf, size, "%04x", id);
343
        else if (d = id_lookup(a, ID_DEVICE, iv, id, 0, 0))
344
            return (char *) d->name;
345
        else if (synth)
1324 jermar 346
            res = snprintf(buf, size, "Unknown device %04x", id);
1302 jermar 347
        else
348
            return NULL;
349
        break;
350
    case PCI_LOOKUP_VENDOR | PCI_LOOKUP_DEVICE:
351
        iv = va_arg(args, int);
352
        id = va_arg(args, int);
353
        if (num)
354
            res = snprintf(buf, size, "%04x:%04x", iv, id);
355
        else {
356
            v = id_lookup(a, ID_VENDOR, iv, 0, 0, 0);
357
            d = id_lookup(a, ID_DEVICE, iv, id, 0, 0);
358
            if (v && d)
1324 jermar 359
                res = snprintf(buf, size, "%s %s", v->name,
1302 jermar 360
                         d->name);
361
            else if (!synth)
362
                return NULL;
363
            else if (!v)
1324 jermar 364
                res = snprintf(buf, size, "Unknown device %04x:%04x", iv, id);
1302 jermar 365
            else    /* !d */
1324 jermar 366
                res = snprintf(buf, size, "%s Unknown device %04x", v->name, id);
1302 jermar 367
        }
368
        break;
369
    case PCI_LOOKUP_SUBSYSTEM | PCI_LOOKUP_VENDOR:
370
        isv = va_arg(args, int);
371
        if (num)
372
            res = snprintf(buf, size, "%04x", isv);
373
        else if (v = id_lookup(a, ID_VENDOR, isv, 0, 0, 0))
374
            return (char *) v->name;
375
        else if (synth)
1324 jermar 376
            res = snprintf(buf, size, "Unknown vendor %04x", isv);
1302 jermar 377
        else
378
            return NULL;
379
        break;
380
    case PCI_LOOKUP_SUBSYSTEM | PCI_LOOKUP_DEVICE:
381
        iv = va_arg(args, int);
382
        id = va_arg(args, int);
383
        isv = va_arg(args, int);
384
        isd = va_arg(args, int);
385
        if (num)
386
            res = snprintf(buf, size, "%04x", isd);
387
        else if (d = id_lookup_subsys(a, iv, id, isv, isd))
388
            return (char *) d->name;
389
        else if (synth)
1324 jermar 390
            res = snprintf(buf, size, "Unknown device %04x", isd);
1302 jermar 391
        else
392
            return NULL;
393
        break;
394
    case PCI_LOOKUP_VENDOR | PCI_LOOKUP_DEVICE | PCI_LOOKUP_SUBSYSTEM:
395
        iv = va_arg(args, int);
396
        id = va_arg(args, int);
397
        isv = va_arg(args, int);
398
        isd = va_arg(args, int);
399
        if (num)
400
            res = snprintf(buf, size, "%04x:%04x", isv, isd);
401
        else {
402
            v = id_lookup(a, ID_VENDOR, isv, 0, 0, 0);
403
            d = id_lookup_subsys(a, iv, id, isv, isd);
404
            if (v && d)
1324 jermar 405
                res = snprintf(buf, size, "%s %s", v->name, d->name);
1302 jermar 406
            else if (!synth)
407
                return NULL;
408
            else if (!v)
1324 jermar 409
                res = snprintf(buf, size, "Unknown device %04x:%04x", isv, isd);
1302 jermar 410
            else    /* !d */
1324 jermar 411
                res = snprintf(buf, size, "%s Unknown device %04x", v->name, isd);
1302 jermar 412
        }
413
        break;
414
    case PCI_LOOKUP_CLASS:
415
        icls = va_arg(args, int);
416
        if (num)
417
            res = snprintf(buf, size, "%04x", icls);
1324 jermar 418
        else if (cls = id_lookup(a, ID_SUBCLASS, icls >> 8, icls & 0xff, 0, 0))
1302 jermar 419
            return (char *) cls->name;
420
        else if (cls = id_lookup(a, ID_CLASS, icls, 0, 0, 0))
1324 jermar 421
            res = snprintf(buf, size, "%s [%04x]", cls->name, icls);
1302 jermar 422
        else if (synth)
423
            res = snprintf(buf, size, "Class %04x", icls);
424
        else
425
            return NULL;
426
        break;
427
    case PCI_LOOKUP_PROGIF:
428
        icls = va_arg(args, int);
429
        ipif = va_arg(args, int);
430
        if (num)
431
            res = snprintf(buf, size, "%02x", ipif);
1324 jermar 432
        else if (pif = id_lookup(a, ID_PROGIF, icls >> 8, icls & 0xff, ipif, 0))
1302 jermar 433
            return (char *) pif->name;
434
        else if (icls == 0x0101 && !(ipif & 0x70)) {
435
            /* IDE controllers have complex prog-if semantics */
436
            res = snprintf(buf, size, "%s%s%s%s%s",
437
                       (ipif & 0x80) ? "Master " : "",
438
                       (ipif & 0x08) ? "SecP " : "",
439
                       (ipif & 0x04) ? "SecO " : "",
440
                       (ipif & 0x02) ? "PriP " : "",
441
                       (ipif & 0x01) ? "PriO " : "");
442
            if (res > 0 && res < size)
443
                buf[--res] = 0;
444
        } else if (synth)
445
            res = snprintf(buf, size, "ProgIf %02x", ipif);
446
        else
447
            return NULL;
448
        break;
449
    default:
450
        return "<pci_lookup_name: invalid request>";
1301 jermar 451
    }
1302 jermar 452
    if (res < 0 || res >= size)
453
        return "<pci_lookup_name: buffer too small>";
454
    else
455
        return buf;
1301 jermar 456
}