Release 4.18 arch/x86/pci/legacy.c
/*
* legacy.c - traditional, old school PCI bus probing
*/
#include <linux/init.h>
#include <linux/export.h>
#include <linux/pci.h>
#include <asm/jailhouse_para.h>
#include <asm/pci_x86.h>
/*
* Discover remaining PCI buses in case there are peer host bridges.
* We use the number of last PCI bus provided by the PCI BIOS.
*/
static void pcibios_fixup_peer_bridges(void)
{
int n;
if (pcibios_last_bus <= 0 || pcibios_last_bus > 0xff)
return;
DBG("PCI: Peer bridge fixup\n");
for (n=0; n <= pcibios_last_bus; n++)
pcibios_scan_specific_bus(n);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick Mochel | 37 | 82.22% | 1 | 25.00% |
| Aristeu Sergio Rozanski Filho | 6 | 13.33% | 1 | 25.00% |
| Yinghai Lu | 1 | 2.22% | 1 | 25.00% |
| Andi Kleen | 1 | 2.22% | 1 | 25.00% |
| Total | 45 | 100.00% | 4 | 100.00% |
int __init pci_legacy_init(void)
{
if (!raw_pci_ops)
return 1;
pr_info("PCI: Probing PCI hardware\n");
pcibios_scan_root(0);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Aristeu Sergio Rozanski Filho | 27 | 93.10% | 1 | 50.00% |
| Thomas Gleixner | 2 | 6.90% | 1 | 50.00% |
| Total | 29 | 100.00% | 2 | 100.00% |
void pcibios_scan_specific_bus(int busn)
{
int stride = jailhouse_paravirt() ? 1 : 8;
int devfn;
u32 l;
if (pci_find_bus(0, busn))
return;
for (devfn = 0; devfn < 256; devfn += stride) {
if (!raw_pci_read(0, busn, devfn, PCI_VENDOR_ID, 2, &l) &&
l != 0x0000 && l != 0xffff) {
DBG("Found device at %02x:%02x [%04x]\n", busn, devfn, l);
pr_info("PCI: Discovered peer bus %02x\n", busn);
pcibios_scan_root(busn);
return;
}
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick Mochel | 61 | 59.22% | 1 | 12.50% |
| Aristeu Sergio Rozanski Filho | 16 | 15.53% | 1 | 12.50% |
| Matthew Wilcox | 13 | 12.62% | 3 | 37.50% |
| Jan Kiszka | 11 | 10.68% | 1 | 12.50% |
| Thomas Gleixner | 1 | 0.97% | 1 | 12.50% |
| Björn Helgaas | 1 | 0.97% | 1 | 12.50% |
| Total | 103 | 100.00% | 8 | 100.00% |
EXPORT_SYMBOL_GPL(pcibios_scan_specific_bus);
static int __init pci_subsys_init(void)
{
/*
* The init function returns an non zero value when
* pci_legacy_init should be invoked.
*/
if (x86_init.pci.init()) {
if (pci_legacy_init()) {
pr_info("PCI: System does not support PCI\n");
return -ENODEV;
}
}
pcibios_fixup_peer_bridges();
x86_init.pci.init_irq();
pcibios_init();
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Thomas Gleixner | 29 | 54.72% | 3 | 37.50% |
| Robert Richter | 20 | 37.74% | 3 | 37.50% |
| Yinghai Lu | 3 | 5.66% | 1 | 12.50% |
| Alexander Kuleshov | 1 | 1.89% | 1 | 12.50% |
| Total | 53 | 100.00% | 8 | 100.00% |
subsys_initcall(pci_subsys_init);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick Mochel | 109 | 42.41% | 1 | 4.76% |
| Aristeu Sergio Rozanski Filho | 49 | 19.07% | 1 | 4.76% |
| Thomas Gleixner | 32 | 12.45% | 3 | 14.29% |
| Robert Richter | 21 | 8.17% | 3 | 14.29% |
| Jan Kiszka | 14 | 5.45% | 1 | 4.76% |
| Matthew Wilcox | 13 | 5.06% | 3 | 14.29% |
| Mauro Carvalho Chehab | 5 | 1.95% | 1 | 4.76% |
| Yinghai Lu | 4 | 1.56% | 2 | 9.52% |
| Tom Rini | 3 | 1.17% | 1 | 4.76% |
| Paul Gortmaker | 3 | 1.17% | 1 | 4.76% |
| Jaswinder Singh Rajput | 1 | 0.39% | 1 | 4.76% |
| Alexander Kuleshov | 1 | 0.39% | 1 | 4.76% |
| Andi Kleen | 1 | 0.39% | 1 | 4.76% |
| Björn Helgaas | 1 | 0.39% | 1 | 4.76% |
| Total | 257 | 100.00% | 21 | 100.00% |
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