static void __iomem * __devinit mcfg_ioremap(struct pci_mmcfg_region *cfg)
{
void __iomem *addr;
u64 start, size;
int num_buses;
start = cfg->address + PCI_MMCFG_BUS_OFFSET(cfg->start_bus);
num_buses = cfg->end_bus - cfg->start_bus + 1;
size = PCI_MMCFG_BUS_OFFSET(num_buses);
addr = ioremap_nocache(start, size);
if (addr)
addr -= PCI_MMCFG_BUS_OFFSET(cfg->start_bus);
return addr;
}
void pci_mmcfg_arch_unmap(struct pci_mmcfg_region *cfg)
{
if (cfg && cfg->virt) {
iounmap(cfg->virt + PCI_MMCFG_BUS_OFFSET(cfg->start_bus));
cfg->virt = NULL;
}
}
static char __iomem *pci_dev_base(unsigned int seg, unsigned int bus, unsigned int devfn)
{
struct pci_mmcfg_region *cfg = pci_mmconfig_lookup(seg, bus);
if (cfg && cfg->virt)
return cfg->virt + (PCI_MMCFG_BUS_OFFSET(bus) | (devfn << 12));
return NULL;
}
/*
* This is always called under pci_config_lock
*/
static void pci_exp_set_dev_base(unsigned int base, int bus, int devfn)
{
u32 dev_base = base | PCI_MMCFG_BUS_OFFSET(bus) | (devfn << 12);
int cpu = smp_processor_id();
if (dev_base != mmcfg_last_accessed_device ||
cpu != mmcfg_last_accessed_cpu) {
mmcfg_last_accessed_device = dev_base;
mmcfg_last_accessed_cpu = cpu;
set_fixmap_nocache(FIX_PCIE_MCFG, dev_base);
}
}
void __iomem *
pci_mcfg_dev_base(struct pci_bus *bus, unsigned int devfn, int offset)
{
struct pci_mmcfg_region *cfg;
cfg = pci_mmconfig_lookup(pci_domain_nr(bus), bus->number);
if (cfg && cfg->virt)
return cfg->virt +
(PCI_MMCFG_BUS_OFFSET(bus->number) | (devfn << 12)) +
offset;
return NULL;
}