linux/arch/x86/pci/numaq_32.c
Linus Torvalds 556f12f602 PCI changes for the v3.9 merge window:
Host bridge hotplug
     - Major overhaul of ACPI host bridge add/start (Rafael Wysocki, Yinghai Lu)
     - Major overhaul of PCI/ACPI binding (Rafael Wysocki, Yinghai Lu)
     - Split out ACPI host bridge and ACPI PCI device hotplug (Yinghai Lu)
     - Stop caching _PRT and make independent of bus numbers (Yinghai Lu)
 
   PCI device hotplug
     - Clean up cpqphp dead code (Sasha Levin)
     - Disable ARI unless device and upstream bridge support it (Yijing Wang)
     - Initialize all hot-added devices (not functions 0-7) (Yijing Wang)
 
   Power management
     - Don't touch ASPM if disabled (Joe Lawrence)
     - Fix ASPM link state management (Myron Stowe)
 
   Miscellaneous
     - Fix PCI_EXP_FLAGS accessor (Alex Williamson)
     - Disable Bus Master in pci_device_shutdown (Konstantin Khlebnikov)
     - Document hotplug resource and MPS parameters (Yijing Wang)
     - Add accessor for PCIe capabilities (Myron Stowe)
     - Drop pciehp suspend/resume messages (Paul Bolle)
     - Make pci_slot built-in only (not a module) (Jiang Liu)
     - Remove unused PCI/ACPI bind ops (Jiang Liu)
     - Removed used pci_root_bus (Bjorn Helgaas)
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Merge tag 'pci-v3.9-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI changes from Bjorn Helgaas:
 "Host bridge hotplug
    - Major overhaul of ACPI host bridge add/start (Rafael Wysocki, Yinghai Lu)
    - Major overhaul of PCI/ACPI binding (Rafael Wysocki, Yinghai Lu)
    - Split out ACPI host bridge and ACPI PCI device hotplug (Yinghai Lu)
    - Stop caching _PRT and make independent of bus numbers (Yinghai Lu)

  PCI device hotplug
    - Clean up cpqphp dead code (Sasha Levin)
    - Disable ARI unless device and upstream bridge support it (Yijing Wang)
    - Initialize all hot-added devices (not functions 0-7) (Yijing Wang)

  Power management
    - Don't touch ASPM if disabled (Joe Lawrence)
    - Fix ASPM link state management (Myron Stowe)

  Miscellaneous
    - Fix PCI_EXP_FLAGS accessor (Alex Williamson)
    - Disable Bus Master in pci_device_shutdown (Konstantin Khlebnikov)
    - Document hotplug resource and MPS parameters (Yijing Wang)
    - Add accessor for PCIe capabilities (Myron Stowe)
    - Drop pciehp suspend/resume messages (Paul Bolle)
    - Make pci_slot built-in only (not a module) (Jiang Liu)
    - Remove unused PCI/ACPI bind ops (Jiang Liu)
    - Removed used pci_root_bus (Bjorn Helgaas)"

* tag 'pci-v3.9-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (51 commits)
  PCI/ACPI: Don't cache _PRT, and don't associate them with bus numbers
  PCI: Fix PCI Express Capability accessors for PCI_EXP_FLAGS
  ACPI / PCI: Make pci_slot built-in only, not a module
  PCI/PM: Clear state_saved during suspend
  PCI: Use atomic_inc_return() rather than atomic_add_return()
  PCI: Catch attempts to disable already-disabled devices
  PCI: Disable Bus Master unconditionally in pci_device_shutdown()
  PCI: acpiphp: Remove dead code for PCI host bridge hotplug
  PCI: acpiphp: Create companion ACPI devices before creating PCI devices
  PCI: Remove unused "rc" in virtfn_add_bus()
  PCI: pciehp: Drop suspend/resume ENTRY messages
  PCI/ASPM: Don't touch ASPM if forcibly disabled
  PCI/ASPM: Deallocate upstream link state even if device is not PCIe
  PCI: Document MPS parameters pci=pcie_bus_safe, pci=pcie_bus_perf, etc
  PCI: Document hpiosize= and hpmemsize= resource reservation parameters
  PCI: Use PCI Express Capability accessor
  PCI: Introduce accessor to retrieve PCIe Capabilities Register
  PCI: Put pci_dev in device tree as early as possible
  PCI: Skip attaching driver in device_add()
  PCI: acpiphp: Keep driver loaded even if no slots found
  ...
2013-02-25 21:18:18 -08:00

166 lines
3.6 KiB
C

/*
* numaq_32.c - Low-level PCI access for NUMA-Q machines
*/
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/nodemask.h>
#include <asm/apic.h>
#include <asm/mpspec.h>
#include <asm/pci_x86.h>
#include <asm/numaq.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 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));
WARN_ON(seg);
if (!value || (bus >= MAX_MP_BUSSES) || (devfn > 255) || (reg > 255))
return -EINVAL;
raw_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;
}
raw_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));
WARN_ON(seg);
if ((bus >= MAX_MP_BUSSES) || (devfn > 255) || (reg > 255))
return -EINVAL;
raw_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;
}
raw_spin_unlock_irqrestore(&pci_config_lock, flags);
return 0;
}
#undef PCI_CONF1_MQ_ADDRESS
static const struct pci_raw_ops pci_direct_conf1_mq = {
.read = pci_conf1_mq_read,
.write = pci_conf1_mq_write
};
static void 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);
dev_info(&d->dev, "searching for i450NX host bridges\n");
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);
dev_dbg(&d->dev, "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);
int __init pci_numaq_init(void)
{
int quad;
raw_pci_ops = &pci_direct_conf1_mq;
pcibios_scan_root(0);
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;
}