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#define _GNU_SOURCE
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <pci/pci.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <dirent.h>
#include <pci/header.h>
#include "common.h"
/* /proc files're 256 bytes but we only need first 64 bytes*/
#define CONFIG_SPACE_SIZE 64
static char *proc_pci_path_default = "/proc/bus/pci/devices";
char* proc_pci_path = NULL;
static void __attribute__((noreturn)) error_and_die(char *msg, ...)
{
va_list args;
va_start(args, msg);
fprintf(stderr, "%s: ", "lspcidrake");
vfprintf(stderr, msg, args);
fputc('\n', stderr);
exit(1);
}
static struct pci_access *pacc;
char* get_pci_description(int vendor_id, int device_id) {
char vendorbuf[128], devbuf[128];
char *buf = malloc(256);
if (!pacc) {
pacc = pci_alloc();
pci_init(pacc); /* Initialize the PCI library */
pacc->numeric_ids = 0;
pci_init(pacc);
}
asprintf(&buf, "%s|%s",
pci_lookup_name(pacc, vendorbuf, sizeof(vendorbuf), PCI_LOOKUP_VENDOR | PCI_LOOKUP_NO_NUMBERS, vendor_id, device_id),
pci_lookup_name(pacc, devbuf, sizeof(devbuf), PCI_LOOKUP_DEVICE, vendor_id, device_id)
);
//pci_cleanup(pacc); // only used by stage1's merge-pcitable.pl that doesn't care about leaking _one_ struct
return buf;
}
// fake two PCI controllers for xen
static detect_xen(struct pciusb_entries *r) {
struct stat sb;
if (stat("/sys/bus/xen", &sb) != 0)
return;
struct pciusb_entry *e = &r->entries[r->nb++];
pciusb_initialize(e);
asprintf(&e->text, "%s|%s", "XenSource, Inc.", "Block Frontend");
e->class_id = 0x0106; // STORAGE_SATA
e->vendor = 0x1a71; // XenSource
e->device = 0xfffa; // fake
e->subvendor = 0;
e->subdevice = 0;
e->class_id = 0x0106;
e->module = strdup("xen_blkfront");
e = &r->entries[r->nb++];
pciusb_initialize(e);
asprintf(&e->text, "%s|%s", "XenSource, Inc.", "Network Frontend");
e->class_id = 0x0200; // NETWORK_ETHERNET
e->vendor = 0x1a71; // XenSource
e->device = 0xfffa; // fake
e->subvendor = 0;
e->subdevice = 0;
e->class_id = 0x0200;
e->module = strdup("xen_netfront");
}
extern struct pciusb_entries pci_probe(void) {
u8 buf[CONFIG_SPACE_SIZE];
struct pciusb_entries r;
static struct pci_access *pacc;
struct pci_dev *dev;
char classbuf[128], vendorbuf[128], devbuf[128];
size_t allocated = MAX_DEVICES;
r.nb = 0;
if ((access(proc_pci_path_default, R_OK) != 0)
|| (proc_pci_path && (access(proc_pci_path_default, R_OK) != 0)))
return r;
pacc = pci_alloc();
if (proc_pci_path) {
pci_set_param(pacc, "proc.path", proc_pci_path);
}
pci_init(pacc);
pacc->error = error_and_die;
pci_scan_bus(pacc);
r.nb = 0;
r.entries = malloc(sizeof(struct pciusb_entry) * MAX_DEVICES);
detect_xen(&r);
for (dev = pacc->devices; dev; dev = dev->next, r.nb++) {
if (r.nb >= allocated) {
allocated = r.nb*2;
r.entries = realloc(r.entries, sizeof(struct pciusb_entry) * allocated);
}
struct pciusb_entry *e = &r.entries[r.nb];
memset(buf, 0, CONFIG_SPACE_SIZE); // make sure not to retrieve values from previous devices
pci_setup_cache(dev, (u8*)buf, CONFIG_SPACE_SIZE);
pci_read_block(dev, 0, buf, CONFIG_SPACE_SIZE);
pci_fill_info(dev, PCI_FILL_IDENT | PCI_FILL_CLASS | PCI_FILL_CAPS);
pciusb_initialize(e);
asprintf(&e->text, "%s|%s",
pci_lookup_name(pacc, vendorbuf, sizeof(vendorbuf), PCI_LOOKUP_VENDOR, dev->vendor_id, dev->device_id),
pci_lookup_name(pacc, devbuf, sizeof(devbuf), PCI_LOOKUP_DEVICE, dev->vendor_id, dev->device_id)
);
pci_lookup_name(pacc, classbuf, sizeof(classbuf), PCI_LOOKUP_CLASS, dev->device_class),
e->class=strdup(classbuf);
e->vendor = dev->vendor_id;
e->device = dev->device_id;
e->pci_domain = dev->domain;
e->pci_bus = dev->bus;
e->pci_device = dev->dev;
e->pci_function = dev->func;
e->class_id = dev->device_class;
e->subvendor = pci_read_word(dev, PCI_SUBSYSTEM_VENDOR_ID);
e->subdevice = pci_read_word(dev, PCI_SUBSYSTEM_ID);
e->pci_revision = pci_read_byte(dev, PCI_REVISION_ID);
if ((e->subvendor == 0 && e->subdevice == 0) ||
(e->subvendor == e->vendor && e->subdevice == e->device)) {
e->subvendor = 0xffff;
e->subdevice = 0xffff;
}
if (pci_find_cap(dev,PCI_CAP_ID_EXP, PCI_CAP_NORMAL))
e->is_pciexpress = 1;
/* special case for realtek 8139 that has two drivers */
if (e->vendor == 0x10ec && e->device == 0x8139) {
if (e->pci_revision < 0x20)
e->module = strdup("8139too");
else
e->module = strdup("8139cp");
}
}
/* shrink to real size */
r.entries = realloc(r.entries, sizeof(struct pciusb_entry) * r.nb);
pci_cleanup(pacc);
if (pciusb_find_modules(&r, "pcitable", DO_NOT_LOAD, 1))
return r;
/* should not happen */
exit(1);
}
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