#include <linux/pci.h>
#include <linux/init.h>
#include <linux/acpi.h>
-#include <linux/dmi.h>
#include <asm/e820.h>
#include "pci.h"
/* The base address of the last MMCONFIG device accessed */
static u32 mmcfg_last_accessed_device;
+static int mmcfg_last_accessed_cpu;
static DECLARE_BITMAP(fallback_slots, MAX_CHECK_BUS*32);
return 0;
}
-static inline void pci_exp_set_dev_base(unsigned int base, int bus, int devfn)
+/*
+ * 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 | (bus << 20) | (devfn << 12);
- if (dev_base != mmcfg_last_accessed_device) {
+ 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);
}
}
}
}
-static int disable_mcfg(struct dmi_system_id *d)
-{
- printk("PCI: %s detected. Disabling MCFG.\n", d->ident);
- pci_probe &= ~PCI_PROBE_MMCONF;
- return 0;
-}
-
-static struct dmi_system_id __initdata dmi_bad_mcfg[] = {
- /* Has broken MCFG table that makes the system hang when used */
- {
- .callback = disable_mcfg,
- .ident = "Intel D3C5105 SDV",
- .matches = {
- DMI_MATCH(DMI_BIOS_VENDOR, "Intel"),
- DMI_MATCH(DMI_BOARD_NAME, "D26928"),
- },
- },
- {}
-};
-
-void __init pci_mmcfg_init(void)
+void __init pci_mmcfg_init(int type)
{
- dmi_check_system(dmi_bad_mcfg);
-
- if ((pci_probe & (PCI_PROBE_MMCONF_FORCE|PCI_PROBE_MMCONF)) == 0)
+ if ((pci_probe & PCI_PROBE_MMCONF) == 0)
return;
- acpi_table_parse(ACPI_MCFG, acpi_parse_mcfg);
+ acpi_table_parse("MCFG", acpi_parse_mcfg);
if ((pci_mmcfg_config_num == 0) ||
(pci_mmcfg_config == NULL) ||
(pci_mmcfg_config[0].base_address == 0))
return;
+ /* Only do this check when type 1 works. If it doesn't work
+ assume we run on a Mac and always use MCFG */
+ if (type == 1 && !e820_all_mapped(pci_mmcfg_config[0].base_address,
+ pci_mmcfg_config[0].base_address + MMCONFIG_APER_MIN,
+ E820_RESERVED)) {
+ printk(KERN_ERR "PCI: BIOS Bug: MCFG area at %x is not E820-reserved\n",
+ pci_mmcfg_config[0].base_address);
+ printk(KERN_ERR "PCI: Not using MMCONFIG.\n");
+ return;
+ }
+
printk(KERN_INFO "PCI: Using MMCONFIG\n");
raw_pci_ops = &pci_mmcfg;
pci_probe = (pci_probe & ~PCI_PROBE_MASK) | PCI_PROBE_MMCONF;