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/*
* numa.c - Low-level PCI access for NUMA-Q machines
*/
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/nodemask.h>
#include <mach_apic.h>
#include <asm/mpspec.h>
#include "pci.h"
#define XQUAD_PORTIO_BASE 0xfe400000
#define XQUAD_PORTIO_QUAD 0x40000 /* 256k per quad. */
#define BUS2QUAD(global) (mp_bus_id_to_node[global])
#define BUS2LOCAL(global) (mp_bus_id_to_local[global])
#define QUADLOCAL2BUS(quad,local) (quad_local_to_mp_bus_id[quad][local])
/* Where the IO area was mapped on multiquad, always 0 otherwise */
void *xquad_portio;
EXPORT_SYMBOL(xquad_portio);
#define XQUAD_PORT_ADDR(port, quad) (xquad_portio + (XQUAD_PORTIO_QUAD*quad) + port)
#define PCI_CONF1_MQ_ADDRESS(bus, devfn, reg) \
(0x80000000 | (BUS2LOCAL(bus) << 16) | (devfn << 8) | (reg & ~3))
static void write_cf8(unsigned bus, unsigned devfn, unsigned reg)
{
unsigned val = PCI_CONF1_MQ_ADDRESS(bus, devfn, reg);
if (xquad_portio)
writel(val, XQUAD_PORT_ADDR(0xcf8, BUS2QUAD(bus)));
else
outl(val, 0xCF8);
}
static int pci_conf1_mq_read(unsigned int seg, unsigned int bus,
unsigned int devfn, int reg, int len, u32 *value)
{
unsigned long flags;
void *adr __iomem = XQUAD_PORT_ADDR(0xcfc, BUS2QUAD(bus));
if (!value || (bus >= MAX_MP_BUSSES) || (devfn > 255) || (reg > 255))
return -EINVAL;
spin_lock_irqsave(&pci_config_lock, flags);
write_cf8(bus, devfn, reg);
switch (len) {
case 1:
if (xquad_portio)
*value = readb(adr + (reg & 3));
else
*value = inb(0xCFC + (reg & 3));
break;
case 2:
if (xquad_portio)
*value = readw(adr + (reg & 2));
else
*value = inw(0xCFC + (reg & 2));
break;
case 4:
if (xquad_portio)
*value = readl(adr);
else
*value = inl(0xCFC);
break;
}
spin_unlock_irqrestore(&pci_config_lock, flags);
return 0;
}
static int pci_conf1_mq_write(unsigned int seg, unsigned int bus,
unsigned int devfn, int reg, int len, u32 value)
{
unsigned long flags;
void *adr __iomem = XQUAD_PORT_ADDR(0xcfc, BUS2QUAD(bus));
if ((bus >= MAX_MP_BUSSES) || (devfn > 255) || (reg > 255))
return -EINVAL;
spin_lock_irqsave(&pci_config_lock, flags);
write_cf8(bus, devfn, reg);
switch (len) {
case 1:
if (xquad_portio)
writeb(value, adr + (reg & 3));
else
outb((u8)value, 0xCFC + (reg & 3));
break;
case 2:
if (xquad_portio)
writew(value, adr + (reg & 2));
else
outw((u16)value, 0xCFC + (reg & 2));
break;
case 4:
if (xquad_portio)
writel(value, adr + reg);
else
outl((u32)value, 0xCFC);
break;
}
spin_unlock_irqrestore(&pci_config_lock, flags);
return 0;
}
#undef PCI_CONF1_MQ_ADDRESS
static struct pci_raw_ops pci_direct_conf1_mq = {
.read = pci_conf1_mq_read,
.write = pci_conf1_mq_write
};
static void __devinit pci_fixup_i450nx(struct pci_dev *d)
{
/*
* i450NX -- Find and scan all secondary buses on all PXB's.
*/
int pxb, reg;
u8 busno, suba, subb;
int quad = BUS2QUAD(d->bus->number);
printk("PCI: Searching for i450NX host bridges on %s\n", pci_name(d));
reg = 0xd0;
for(pxb=0; pxb<2; pxb++) {
pci_read_config_byte(d, reg++, &busno);
pci_read_config_byte(d, reg++, &suba);
pci_read_config_byte(d, reg++, &subb);
DBG("i450NX PXB %d: %02x/%02x/%02x\n", pxb, busno, suba, subb);
if (busno) {
/* Bus A */
pci_scan_bus_with_sysdata(QUADLOCAL2BUS(quad, busno));
}
if (suba < subb) {
/* Bus B */
pci_scan_bus_with_sysdata(QUADLOCAL2BUS(quad, suba+1));
}
}
pcibios_last_bus = -1;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82451NX, pci_fixup_i450nx);
static int __init pci_numa_init(void)
{
int quad;
if (!found_numaq)
return 0;
raw_pci_ops = &pci_direct_conf1_mq;
if (pcibios_scanned++)
return 0;
pci_root_bus = pcibios_scan_root(0);
if (pci_root_bus)
pci_bus_add_devices(pci_root_bus);
if (num_online_nodes() > 1)
for_each_online_node(quad) {
if (quad == 0)
continue;
printk("Scanning PCI bus %d for quad %d\n",
QUADLOCAL2BUS(quad,0), quad);
pci_scan_bus_with_sysdata(QUADLOCAL2BUS(quad, 0));
}
return 0;
}
subsys_initcall(pci_numa_init);
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