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authorOlivier Galibert <galibert@pobox.com>2007-02-13 13:26:20 +0100
committerAndi Kleen <andi@basil.nowhere.org>2007-02-13 13:26:20 +0100
commitb78673944b22b662b270c8bba5c198f19e4ee4e1 (patch)
tree3cbbe3808335fc297fb3daf01dcbf26d4243a2db /arch/x86_64/pci
parent2e188938ab2358034801938c2329b016ca135823 (diff)
[PATCH] mmconfig: Share parts of mmconfig code between i386 and x86-64
i386 and x86-64 pci mmconfig code have a lot in common. So share what's shareable between the two. Signed-off-by: Olivier Galibert <galibert@pobox.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org>
Diffstat (limited to 'arch/x86_64/pci')
-rw-r--r--arch/x86_64/pci/Makefile3
-rw-r--r--arch/x86_64/pci/mmconfig.c76
2 files changed, 14 insertions, 65 deletions
diff --git a/arch/x86_64/pci/Makefile b/arch/x86_64/pci/Makefile
index 149aba05a5b8..c9eddc8859c0 100644
--- a/arch/x86_64/pci/Makefile
+++ b/arch/x86_64/pci/Makefile
@@ -11,7 +11,7 @@ obj-y += fixup.o init.o
obj-$(CONFIG_ACPI) += acpi.o
obj-y += legacy.o irq.o common.o early.o
# mmconfig has a 64bit special
-obj-$(CONFIG_PCI_MMCONFIG) += mmconfig.o direct.o
+obj-$(CONFIG_PCI_MMCONFIG) += mmconfig.o direct.o mmconfig-shared.o
obj-$(CONFIG_NUMA) += k8-bus.o
@@ -24,3 +24,4 @@ fixup-y += ../../i386/pci/fixup.o
i386-y += ../../i386/pci/i386.o
init-y += ../../i386/pci/init.o
early-y += ../../i386/pci/early.o
+mmconfig-shared-y += ../../i386/pci/mmconfig-shared.o
diff --git a/arch/x86_64/pci/mmconfig.c b/arch/x86_64/pci/mmconfig.c
index faabb6e87f12..0847735bb31e 100644
--- a/arch/x86_64/pci/mmconfig.c
+++ b/arch/x86_64/pci/mmconfig.c
@@ -19,9 +19,7 @@
/* Verify the first 16 busses. We assume that systems with more busses
get MCFG right. */
-#define MAX_CHECK_BUS 16
-
-static DECLARE_BITMAP(fallback_slots, 32*MAX_CHECK_BUS);
+#define PCI_MMCFG_MAX_CHECK_BUS 16
/* Static virtual mapping of the MMCONFIG aperture */
struct mmcfg_virt {
@@ -63,8 +61,8 @@ static char __iomem *get_virt(unsigned int seg, unsigned bus)
static char __iomem *pci_dev_base(unsigned int seg, unsigned int bus, unsigned int devfn)
{
char __iomem *addr;
- if (seg == 0 && bus < MAX_CHECK_BUS &&
- test_bit(32*bus + PCI_SLOT(devfn), fallback_slots))
+ if (seg == 0 && bus < PCI_MMCFG_MAX_CHECK_BUS &&
+ test_bit(32*bus + PCI_SLOT(devfn), pci_mmcfg_fallback_slots))
return NULL;
addr = get_virt(seg, bus);
if (!addr)
@@ -135,63 +133,16 @@ static struct pci_raw_ops pci_mmcfg = {
.write = pci_mmcfg_write,
};
-/* K8 systems have some devices (typically in the builtin northbridge)
- that are only accessible using type1
- Normally this can be expressed in the MCFG by not listing them
- and assigning suitable _SEGs, but this isn't implemented in some BIOS.
- Instead try to discover all devices on bus 0 that are unreachable using MM
- and fallback for them. */
-static __init void unreachable_devices(void)
-{
- int i, k;
- /* Use the max bus number from ACPI here? */
- for (k = 0; k < MAX_CHECK_BUS; k++) {
- for (i = 0; i < 32; i++) {
- u32 val1;
- char __iomem *addr;
-
- pci_conf1_read(0, k, PCI_DEVFN(i,0), 0, 4, &val1);
- if (val1 == 0xffffffff)
- continue;
- addr = pci_dev_base(0, k, PCI_DEVFN(i, 0));
- if (addr == NULL|| readl(addr) != val1) {
- set_bit(i + 32*k, fallback_slots);
- printk(KERN_NOTICE "PCI: No mmconfig possible"
- " on device %02x:%02x\n", k, i);
- }
- }
- }
-}
-
-void __init pci_mmcfg_init(int type)
+int __init pci_mmcfg_arch_init(void)
{
int i;
-
- if ((pci_probe & PCI_PROBE_MMCONF) == 0)
- return;
-
- acpi_table_parse(ACPI_SIG_MCFG, acpi_parse_mcfg);
- if ((pci_mmcfg_config_num == 0) ||
- (pci_mmcfg_config == NULL) ||
- (pci_mmcfg_config[0].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].address,
- pci_mmcfg_config[0].address + MMCONFIG_APER_MIN,
- E820_RESERVED)) {
- printk(KERN_ERR "PCI: BIOS Bug: MCFG area at %lx is not E820-reserved\n",
- (unsigned long)pci_mmcfg_config[0].address);
- printk(KERN_ERR "PCI: Not using MMCONFIG.\n");
- return;
- }
-
- pci_mmcfg_virt = kmalloc(sizeof(*pci_mmcfg_virt) * pci_mmcfg_config_num, GFP_KERNEL);
+ pci_mmcfg_virt = kmalloc(sizeof(*pci_mmcfg_virt) *
+ pci_mmcfg_config_num, GFP_KERNEL);
if (pci_mmcfg_virt == NULL) {
printk(KERN_ERR "PCI: Can not allocate memory for mmconfig structures\n");
- return;
+ return 0;
}
+
for (i = 0; i < pci_mmcfg_config_num; ++i) {
pci_mmcfg_virt[i].cfg = &pci_mmcfg_config[i];
pci_mmcfg_virt[i].virt = ioremap_nocache(pci_mmcfg_config[i].address,
@@ -200,14 +151,11 @@ void __init pci_mmcfg_init(int type)
printk(KERN_ERR "PCI: Cannot map mmconfig aperture for "
"segment %d\n",
pci_mmcfg_config[i].pci_segment);
- return;
+ return 0;
}
- printk(KERN_INFO "PCI: Using MMCONFIG at %lx\n",
- (unsigned long)pci_mmcfg_config[i].address);
+ printk(KERN_INFO "PCI: Using MMCONFIG at %Lx\n",
+ pci_mmcfg_config[i].address);
}
-
- unreachable_devices();
-
raw_pci_ops = &pci_mmcfg;
- pci_probe = (pci_probe & ~PCI_PROBE_MASK) | PCI_PROBE_MMCONF;
+ return 1;
}