/[soft]/ldetect/trunk/pci.c
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Contents of /ldetect/trunk/pci.c

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Revision 1357 - (show annotations) (download)
Tue May 17 09:21:22 2011 UTC (10 years, 1 month ago) by dmorgan
File MIME type: text/plain
File size: 3259 byte(s)
Import  ldetect
1 #define _GNU_SOURCE
2 #include <stdio.h>
3 #include <stdarg.h>
4 #include <stdlib.h>
5 #include <string.h>
6 #include <pci/pci.h>
7 #include <sys/types.h>
8 #include <sys/stat.h>
9 #include <fcntl.h>
10 #include <unistd.h>
11 #include <dirent.h>
12 #include <pci/header.h>
13 #include "common.h"
14
15 /* /proc files're 256 bytes but we only need first 64 bytes*/
16 #define CONFIG_SPACE_SIZE 64
17
18 static char *proc_pci_path_default = "/proc/bus/pci/devices";
19 char* proc_pci_path = NULL;
20
21 static void __attribute__((noreturn)) error_and_die(char *msg, ...)
22 {
23 va_list args;
24
25 va_start(args, msg);
26 fprintf(stderr, "%s: ", "lspcidrake");
27 vfprintf(stderr, msg, args);
28 fputc('\n', stderr);
29 exit(1);
30 }
31
32 extern struct pciusb_entries pci_probe(void) {
33 u8 buf[CONFIG_SPACE_SIZE];
34 struct pciusb_entries r;
35
36 static struct pci_access *pacc;
37 struct pci_dev *dev;
38 char classbuf[128], vendorbuf[128], devbuf[128];
39
40 pacc = pci_alloc();
41
42 if (proc_pci_path) {
43 pci_set_param(pacc, "proc.path", proc_pci_path);
44 }
45
46
47 pci_init(pacc);
48 pacc->error = error_and_die;
49 pci_scan_bus(pacc);
50
51 r.nb = 0;
52 r.entries = malloc(sizeof(struct pciusb_entry) * MAX_DEVICES);
53
54 for (dev = pacc->devices; dev && r.nb < MAX_DEVICES; dev = dev->next, r.nb++) {
55
56 struct pciusb_entry *e = &r.entries[r.nb];
57 memset(buf, 0, CONFIG_SPACE_SIZE); // make sure not to retrieve values from previous devices
58 pci_setup_cache(dev, (u8*)buf, CONFIG_SPACE_SIZE);
59 pci_read_block(dev, 0, buf, CONFIG_SPACE_SIZE);
60 pci_fill_info(dev, PCI_FILL_IDENT | PCI_FILL_CLASS | PCI_FILL_CAPS);
61
62 pciusb_initialize(e);
63
64 asprintf(&e->text, "%s|%s",
65 pci_lookup_name(pacc, vendorbuf, sizeof(vendorbuf), PCI_LOOKUP_VENDOR, dev->vendor_id, dev->device_id),
66 pci_lookup_name(pacc, devbuf, sizeof(devbuf), PCI_LOOKUP_DEVICE, dev->vendor_id, dev->device_id)
67 );
68 pci_lookup_name(pacc, classbuf, sizeof(classbuf), PCI_LOOKUP_CLASS, dev->device_class),
69 e->class=strdup(classbuf);
70
71 e->vendor = dev->vendor_id;
72 e->device = dev->device_id;
73 e->pci_domain = dev->domain;
74 e->pci_bus = dev->bus;
75 e->pci_device = dev->dev;
76 e->pci_function = dev->func;
77
78 e->class_id = dev->device_class;
79 e->subvendor = pci_read_word(dev, PCI_SUBSYSTEM_VENDOR_ID);
80 e->subdevice = pci_read_word(dev, PCI_SUBSYSTEM_ID);
81 e->pci_revision = pci_read_byte(dev, PCI_REVISION_ID);
82
83 if ((e->subvendor == 0 && e->subdevice == 0) ||
84 (e->subvendor == e->vendor && e->subdevice == e->device)) {
85 e->subvendor = 0xffff;
86 e->subdevice = 0xffff;
87 }
88
89 if (pci_find_cap(dev,PCI_CAP_ID_EXP, PCI_CAP_NORMAL))
90 e->is_pciexpress = 1;
91
92 /* special case for realtek 8139 that has two drivers */
93 if (e->vendor == 0x10ec && e->device == 0x8139) {
94 if (e->pci_revision < 0x20)
95 e->module = strdup("8139too");
96 else
97 e->module = strdup("8139cp");
98 }
99
100 }
101
102 /* shrink to real size */
103 r.entries = realloc(r.entries, sizeof(struct pciusb_entry) * r.nb);
104
105 pci_cleanup(pacc);
106
107 if (pciusb_find_modules(&r, "pcitable", DO_NOT_LOAD, 1))
108 return r;
109
110 /* should not happen */
111 exit(1);
112 }

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