From fb9aa6f1d4a1e11e66a680460b2c2b2b10b62f79 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 11 Oct 2007 11:16:36 +0200 Subject: i386: move pci Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar --- arch/x86/pci/numa.c | 135 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 135 insertions(+) create mode 100644 arch/x86/pci/numa.c (limited to 'arch/x86/pci/numa.c') diff --git a/arch/x86/pci/numa.c b/arch/x86/pci/numa.c new file mode 100644 index 00000000000..f5f165f69e0 --- /dev/null +++ b/arch/x86/pci/numa.c @@ -0,0 +1,135 @@ +/* + * numa.c - Low-level PCI access for NUMA-Q machines + */ + +#include +#include +#include +#include "pci.h" + +#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]) + +#define PCI_CONF1_MQ_ADDRESS(bus, devfn, reg) \ + (0x80000000 | (BUS2LOCAL(bus) << 16) | (devfn << 8) | (reg & ~3)) + +static int pci_conf1_mq_read(unsigned int seg, unsigned int bus, + unsigned int devfn, int reg, int len, u32 *value) +{ + unsigned long flags; + + if (!value || (bus >= MAX_MP_BUSSES) || (devfn > 255) || (reg > 255)) + return -EINVAL; + + spin_lock_irqsave(&pci_config_lock, flags); + + outl_quad(PCI_CONF1_MQ_ADDRESS(bus, devfn, reg), 0xCF8, BUS2QUAD(bus)); + + switch (len) { + case 1: + *value = inb_quad(0xCFC + (reg & 3), BUS2QUAD(bus)); + break; + case 2: + *value = inw_quad(0xCFC + (reg & 2), BUS2QUAD(bus)); + break; + case 4: + *value = inl_quad(0xCFC, BUS2QUAD(bus)); + 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; + + if ((bus >= MAX_MP_BUSSES) || (devfn > 255) || (reg > 255)) + return -EINVAL; + + spin_lock_irqsave(&pci_config_lock, flags); + + outl_quad(PCI_CONF1_MQ_ADDRESS(bus, devfn, reg), 0xCF8, BUS2QUAD(bus)); + + switch (len) { + case 1: + outb_quad((u8)value, 0xCFC + (reg & 3), BUS2QUAD(bus)); + break; + case 2: + outw_quad((u16)value, 0xCFC + (reg & 2), BUS2QUAD(bus)); + break; + case 4: + outl_quad((u32)value, 0xCFC, BUS2QUAD(bus)); + 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; + + 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); -- cgit v1.2.3