0,0 → 1,456 |
/* |
* The PCI Library -- ID to Name Translation |
* |
* Copyright (c) 1997--2005 Martin Mares <mj@ucw.cz> |
* |
* May 8, 2006 - Modified and ported to HelenOS by Jakub Jermar. |
* |
* Can be freely distributed and used under the terms of the GNU GPL. |
*/ |
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#include <stdio.h> |
#include <stdlib.h> |
#include <stdarg.h> |
#include <string.h> |
#include <errno.h> |
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#include "internal.h" |
#include "pci_ids.h" |
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struct id_entry { |
struct id_entry *next; |
u32 id12, id34; |
byte cat; |
byte name[1]; |
}; |
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enum id_entry_type { |
ID_UNKNOWN, |
ID_VENDOR, |
ID_DEVICE, |
ID_SUBSYSTEM, |
ID_GEN_SUBSYSTEM, |
ID_CLASS, |
ID_SUBCLASS, |
ID_PROGIF |
}; |
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struct id_bucket { |
struct id_bucket *next; |
unsigned int full; |
}; |
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#define MAX_LINE 1024 |
#define BUCKET_SIZE 8192 |
#define HASH_SIZE 4099 |
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#ifdef __GNUC__ |
#define BUCKET_ALIGNMENT __alignof__(struct id_bucket) |
#else |
union id_align { |
struct id_bucket *next; |
unsigned int full; |
}; |
#define BUCKET_ALIGNMENT sizeof(union id_align) |
#endif |
#define BUCKET_ALIGN(n) ((n)+BUCKET_ALIGNMENT-(n)%BUCKET_ALIGNMENT) |
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static void *id_alloc(struct pci_access *a, unsigned int size) |
{ |
struct id_bucket *buck = a->current_id_bucket; |
unsigned int pos; |
if (!buck || buck->full + size > BUCKET_SIZE) { |
buck = pci_malloc(a, BUCKET_SIZE); |
buck->next = a->current_id_bucket; |
a->current_id_bucket = buck; |
buck->full = BUCKET_ALIGN(sizeof(struct id_bucket)); |
} |
pos = buck->full; |
buck->full = BUCKET_ALIGN(buck->full + size); |
return (byte *) buck + pos; |
} |
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static inline u32 id_pair(unsigned int x, unsigned int y) |
{ |
return ((x << 16) | y); |
} |
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static inline unsigned int id_hash(int cat, u32 id12, u32 id34) |
{ |
unsigned int h; |
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h = id12 ^ (id34 << 3) ^ (cat << 5); |
return h % HASH_SIZE; |
} |
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static struct id_entry *id_lookup(struct pci_access *a, int cat, int id1, |
int id2, int id3, int id4) |
{ |
struct id_entry *n; |
u32 id12 = id_pair(id1, id2); |
u32 id34 = id_pair(id3, id4); |
|
n = a->id_hash[id_hash(cat, id12, id34)]; |
while (n && (n->id12 != id12 || n->id34 != id34 || n->cat != cat)) |
n = n->next; |
return n; |
} |
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static int id_insert(struct pci_access *a, int cat, int id1, int id2, |
int id3, int id4, byte * text) |
{ |
u32 id12 = id_pair(id1, id2); |
u32 id34 = id_pair(id3, id4); |
unsigned int h = id_hash(cat, id12, id34); |
struct id_entry *n = a->id_hash[h]; |
int len = strlen((char *) text); |
|
while (n && (n->id12 != id12 || n->id34 != id34 || n->cat != cat)) |
n = n->next; |
if (n) |
return 1; |
n = id_alloc(a, sizeof(struct id_entry) + len); |
n->id12 = id12; |
n->id34 = id34; |
n->cat = cat; |
memcpy(n->name, text, len + 1); |
n->next = a->id_hash[h]; |
a->id_hash[h] = n; |
return 0; |
} |
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static int id_hex(byte * p, int cnt) |
{ |
int x = 0; |
while (cnt--) { |
x <<= 4; |
if (*p >= '0' && *p <= '9') |
x += (*p - '0'); |
else if (*p >= 'a' && *p <= 'f') |
x += (*p - 'a' + 10); |
else if (*p >= 'A' && *p <= 'F') |
x += (*p - 'A' + 10); |
else |
return -1; |
p++; |
} |
return x; |
} |
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static inline int id_white_p(int c) |
{ |
return (c == ' ') || (c == '\t'); |
} |
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static const char *id_parse_list(struct pci_access *a, int *lino) |
{ |
byte *line; |
byte *p; |
int id1 = 0, id2 = 0, id3 = 0, id4 = 0; |
int cat = -1; |
int nest; |
static const char parse_error[] = "Parse error"; |
int i; |
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*lino = 0; |
for (i = 0; i < sizeof(pci_ids) / sizeof(char *); i++) { |
line = (byte *) pci_ids[i]; |
(*lino)++; |
p = line; |
while (*p) |
p++; |
if (p > line && (p[-1] == ' ' || p[-1] == '\t')) |
*--p = 0; |
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p = line; |
while (id_white_p(*p)) |
p++; |
if (!*p || *p == '#') |
continue; |
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p = line; |
while (*p == '\t') |
p++; |
nest = p - line; |
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if (!nest) { /* Top-level entries */ |
if (p[0] == 'C' && p[1] == ' ') { /* Class block */ |
if ((id1 = id_hex(p + 2, 2)) < 0 || !id_white_p(p[4])) |
return parse_error; |
cat = ID_CLASS; |
p += 5; |
} else if (p[0] == 'S' && p[1] == ' ') { /* Generic subsystem block */ |
if ((id1 = id_hex(p + 2, 4)) < 0 || p[6]) |
return parse_error; |
if (!id_lookup(a, ID_VENDOR, id1, 0, 0, 0)) |
return "Vendor does not exist"; |
cat = ID_GEN_SUBSYSTEM; |
continue; |
} else if (p[0] >= 'A' && p[0] <= 'Z' && p[1] == ' ') { /* Unrecognized block (RFU) */ |
cat = ID_UNKNOWN; |
continue; |
} else { /* Vendor ID */ |
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if ((id1 = id_hex(p, 4)) < 0 || !id_white_p(p[4])) |
return parse_error; |
cat = ID_VENDOR; |
p += 5; |
} |
id2 = id3 = id4 = 0; |
} else if (cat == ID_UNKNOWN) /* Nested entries in RFU blocks are skipped */ |
continue; |
else if (nest == 1) /* Nesting level 1 */ |
switch (cat) { |
case ID_VENDOR: |
case ID_DEVICE: |
case ID_SUBSYSTEM: |
if ((id2 = id_hex(p, 4)) < 0 || !id_white_p(p[4])) |
return parse_error; |
p += 5; |
cat = ID_DEVICE; |
id3 = id4 = 0; |
break; |
case ID_GEN_SUBSYSTEM: |
if ((id2 = id_hex(p, 4)) < 0 || !id_white_p(p[4])) |
return parse_error; |
p += 5; |
id3 = id4 = 0; |
break; |
case ID_CLASS: |
case ID_SUBCLASS: |
case ID_PROGIF: |
if ((id2 = id_hex(p, 2)) < 0 || !id_white_p(p[2])) |
return parse_error; |
p += 3; |
cat = ID_SUBCLASS; |
id3 = id4 = 0; |
break; |
default: |
return parse_error; |
} else if (nest == 2) /* Nesting level 2 */ |
switch (cat) { |
case ID_DEVICE: |
case ID_SUBSYSTEM: |
if ((id3 = id_hex(p, 4)) < 0 || !id_white_p(p[4]) |
|| (id4 = id_hex(p + 5, 4)) < 0 || !id_white_p(p[9])) |
return parse_error; |
p += 10; |
cat = ID_SUBSYSTEM; |
break; |
case ID_CLASS: |
case ID_SUBCLASS: |
case ID_PROGIF: |
if ((id3 = id_hex(p, 2)) < 0 || !id_white_p(p[2])) |
return parse_error; |
p += 3; |
cat = ID_PROGIF; |
id4 = 0; |
break; |
default: |
return parse_error; |
} else /* Nesting level 3 or more */ |
return parse_error; |
while (id_white_p(*p)) |
p++; |
if (!*p) |
return parse_error; |
if (id_insert(a, cat, id1, id2, id3, id4, p)) |
return "Duplicate entry"; |
} |
return NULL; |
} |
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int pci_load_name_list(struct pci_access *a) |
{ |
int lino; |
const char *err; |
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pci_free_name_list(a); |
a->id_hash = pci_malloc(a, sizeof(struct id_entry *) * HASH_SIZE); |
bzero(a->id_hash, sizeof(struct id_entry *) * HASH_SIZE); |
err = id_parse_list(a, &lino); |
if (err) |
a->error("%s at %s, element %d\n", err, "pci_ids.h", lino); |
return 1; |
} |
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void pci_free_name_list(struct pci_access *a) |
{ |
pci_mfree(a->id_hash); |
a->id_hash = NULL; |
while (a->current_id_bucket) { |
struct id_bucket *buck = a->current_id_bucket; |
a->current_id_bucket = buck->next; |
pci_mfree(buck); |
} |
} |
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static struct id_entry *id_lookup_subsys(struct pci_access *a, int iv, |
int id, int isv, int isd) |
{ |
struct id_entry *d = NULL; |
if (iv > 0 && id > 0) /* Per-device lookup */ |
d = id_lookup(a, ID_SUBSYSTEM, iv, id, isv, isd); |
if (!d) /* Generic lookup */ |
d = id_lookup(a, ID_GEN_SUBSYSTEM, isv, isd, 0, 0); |
if (!d && iv == isv && id == isd) /* Check for subsystem == device */ |
d = id_lookup(a, ID_DEVICE, iv, id, 0, 0); |
return d; |
} |
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char *pci_lookup_name(struct pci_access *a, char *buf, int size, int flags, |
...) |
{ |
va_list args; |
int num, res, synth; |
struct id_entry *v, *d, *cls, *pif; |
int iv, id, isv, isd, icls, ipif; |
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va_start(args, flags); |
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num = 0; |
if ((flags & PCI_LOOKUP_NUMERIC) || a->numeric_ids) { |
flags &= ~PCI_LOOKUP_NUMERIC; |
num = 1; |
} else if (!a->id_hash) { |
if (!pci_load_name_list(a)) |
num = a->numeric_ids = 1; |
} |
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if (flags & PCI_LOOKUP_NO_NUMBERS) { |
flags &= ~PCI_LOOKUP_NO_NUMBERS; |
synth = 0; |
if (num) |
return NULL; |
} else |
synth = 1; |
|
switch (flags) { |
case PCI_LOOKUP_VENDOR: |
iv = va_arg(args, int); |
if (num) |
res = snprintf(buf, size, "%04x", iv); |
else if (v = id_lookup(a, ID_VENDOR, iv, 0, 0, 0)) |
return (char *) v->name; |
else |
res = snprintf(buf, size, "Unknown vendor %04x", iv); |
break; |
case PCI_LOOKUP_DEVICE: |
iv = va_arg(args, int); |
id = va_arg(args, int); |
if (num) |
res = snprintf(buf, size, "%04x", id); |
else if (d = id_lookup(a, ID_DEVICE, iv, id, 0, 0)) |
return (char *) d->name; |
else if (synth) |
res = snprintf(buf, size, "Unknown device %04x", id); |
else |
return NULL; |
break; |
case PCI_LOOKUP_VENDOR | PCI_LOOKUP_DEVICE: |
iv = va_arg(args, int); |
id = va_arg(args, int); |
if (num) |
res = snprintf(buf, size, "%04x:%04x", iv, id); |
else { |
v = id_lookup(a, ID_VENDOR, iv, 0, 0, 0); |
d = id_lookup(a, ID_DEVICE, iv, id, 0, 0); |
if (v && d) |
res = snprintf(buf, size, "%s %s", v->name, |
d->name); |
else if (!synth) |
return NULL; |
else if (!v) |
res = snprintf(buf, size, "Unknown device %04x:%04x", iv, id); |
else /* !d */ |
res = snprintf(buf, size, "%s Unknown device %04x", v->name, id); |
} |
break; |
case PCI_LOOKUP_SUBSYSTEM | PCI_LOOKUP_VENDOR: |
isv = va_arg(args, int); |
if (num) |
res = snprintf(buf, size, "%04x", isv); |
else if (v = id_lookup(a, ID_VENDOR, isv, 0, 0, 0)) |
return (char *) v->name; |
else if (synth) |
res = snprintf(buf, size, "Unknown vendor %04x", isv); |
else |
return NULL; |
break; |
case PCI_LOOKUP_SUBSYSTEM | PCI_LOOKUP_DEVICE: |
iv = va_arg(args, int); |
id = va_arg(args, int); |
isv = va_arg(args, int); |
isd = va_arg(args, int); |
if (num) |
res = snprintf(buf, size, "%04x", isd); |
else if (d = id_lookup_subsys(a, iv, id, isv, isd)) |
return (char *) d->name; |
else if (synth) |
res = snprintf(buf, size, "Unknown device %04x", isd); |
else |
return NULL; |
break; |
case PCI_LOOKUP_VENDOR | PCI_LOOKUP_DEVICE | PCI_LOOKUP_SUBSYSTEM: |
iv = va_arg(args, int); |
id = va_arg(args, int); |
isv = va_arg(args, int); |
isd = va_arg(args, int); |
if (num) |
res = snprintf(buf, size, "%04x:%04x", isv, isd); |
else { |
v = id_lookup(a, ID_VENDOR, isv, 0, 0, 0); |
d = id_lookup_subsys(a, iv, id, isv, isd); |
if (v && d) |
res = snprintf(buf, size, "%s %s", v->name, d->name); |
else if (!synth) |
return NULL; |
else if (!v) |
res = snprintf(buf, size, "Unknown device %04x:%04x", isv, isd); |
else /* !d */ |
res = snprintf(buf, size, "%s Unknown device %04x", v->name, isd); |
} |
break; |
case PCI_LOOKUP_CLASS: |
icls = va_arg(args, int); |
if (num) |
res = snprintf(buf, size, "%04x", icls); |
else if (cls = id_lookup(a, ID_SUBCLASS, icls >> 8, icls & 0xff, 0, 0)) |
return (char *) cls->name; |
else if (cls = id_lookup(a, ID_CLASS, icls, 0, 0, 0)) |
res = snprintf(buf, size, "%s [%04x]", cls->name, icls); |
else if (synth) |
res = snprintf(buf, size, "Class %04x", icls); |
else |
return NULL; |
break; |
case PCI_LOOKUP_PROGIF: |
icls = va_arg(args, int); |
ipif = va_arg(args, int); |
if (num) |
res = snprintf(buf, size, "%02x", ipif); |
else if (pif = id_lookup(a, ID_PROGIF, icls >> 8, icls & 0xff, ipif, 0)) |
return (char *) pif->name; |
else if (icls == 0x0101 && !(ipif & 0x70)) { |
/* IDE controllers have complex prog-if semantics */ |
res = snprintf(buf, size, "%s%s%s%s%s", |
(ipif & 0x80) ? "Master " : "", |
(ipif & 0x08) ? "SecP " : "", |
(ipif & 0x04) ? "SecO " : "", |
(ipif & 0x02) ? "PriP " : "", |
(ipif & 0x01) ? "PriO " : ""); |
if (res > 0 && res < size) |
buf[--res] = 0; |
} else if (synth) |
res = snprintf(buf, size, "ProgIf %02x", ipif); |
else |
return NULL; |
break; |
default: |
return "<pci_lookup_name: invalid request>"; |
} |
if (res < 0 || res >= size) |
return "<pci_lookup_name: buffer too small>"; |
else |
return buf; |
} |