x86/pci: add pci=skip_isa_align command lines.

so we don't align the io port start address for pci cards.

also move out dmi check out acpi.c, because it has nothing to do with acpi.
it could spare some calling when we have several peer root buses.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 3ce193f8656514519d9d9f1db03f24a5722c3011..15d8216a93450209fe128d0eafd47057fb4c2d5c 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1518,6 +1518,8 @@ and is between 256 and 4096 characters. It is defined in the file
                                This is normally done in pci_enable_device(),
                                so this option is a temporary workaround
                                for broken drivers that don't call it.
+               skip_isa_align  [X86] do not align io start addr, so can
+                               handle more pci cards
                firmware        [ARM] Do not re-enumerate the bus but instead
                                just use the configuration from the
                                bootloader. This is currently used on

diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
index 1a9c0c6a1a1847f88c0024b06d18dfbd91d8cc22..d95de2f199cdaf45c3b44663dc32ed884de98b1d 100644 (file)
--- a/arch/x86/pci/acpi.c
+++ b/arch/x86/pci/acpi.c
@@ -6,45 +6,6 @@
 #include <asm/numa.h>
 #include "pci.h"
 
-static int __devinit can_skip_ioresource_align(const struct dmi_system_id *d)
-{
-       pci_probe |= PCI_CAN_SKIP_ISA_ALIGN;
-       printk(KERN_INFO "PCI: %s detected, can skip ISA alignment\n", d->ident);
-       return 0;
-}
-
-static struct dmi_system_id acpi_pciprobe_dmi_table[] __devinitdata = {
-/*
- * Systems where PCI IO resource ISA alignment can be skipped
- * when the ISA enable bit in the bridge control is not set
- */
-       {
-               .callback = can_skip_ioresource_align,
-               .ident = "IBM System x3800",
-               .matches = {
-                       DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
-                       DMI_MATCH(DMI_PRODUCT_NAME, "x3800"),
-               },
-       },
-       {
-               .callback = can_skip_ioresource_align,
-               .ident = "IBM System x3850",
-               .matches = {
-                       DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
-                       DMI_MATCH(DMI_PRODUCT_NAME, "x3850"),
-               },
-       },
-       {
-               .callback = can_skip_ioresource_align,
-               .ident = "IBM System x3950",
-               .matches = {
-                       DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
-                       DMI_MATCH(DMI_PRODUCT_NAME, "x3950"),
-               },
-       },
-       {}
-};
-
 struct pci_root_info {
        char *name;
        unsigned int res_num;
@@ -196,8 +157,6 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int do
        int pxm;
 #endif
 
-       dmi_check_system(acpi_pciprobe_dmi_table);
-
        if (domain && !pci_domains_supported) {
                printk(KERN_WARNING "PCI: Multiple domains not supported "
                       "(dom %d, bus %d)\n", domain, busnum);

diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c
index 88b5416cf009a331488c01a4f0e9dbe1023eaeb7..a6d27797ef4702b18b090eb179b852a3511ad493 100644 (file)
--- a/arch/x86/pci/common.c
+++ b/arch/x86/pci/common.c
@@ -90,6 +90,50 @@ static void __devinit pcibios_fixup_device_resources(struct pci_dev *dev)
                rom_r->start = rom_r->end = rom_r->flags = 0;
 }
 
+static int __devinit can_skip_ioresource_align(const struct dmi_system_id *d)
+{
+       pci_probe |= PCI_CAN_SKIP_ISA_ALIGN;
+       printk(KERN_INFO "PCI: %s detected, can skip ISA alignment\n", d->ident);
+       return 0;
+}
+
+static struct dmi_system_id can_skip_pciprobe_dmi_table[] __devinitdata = {
+/*
+ * Systems where PCI IO resource ISA alignment can be skipped
+ * when the ISA enable bit in the bridge control is not set
+ */
+       {
+               .callback = can_skip_ioresource_align,
+               .ident = "IBM System x3800",
+               .matches = {
+                       DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
+                       DMI_MATCH(DMI_PRODUCT_NAME, "x3800"),
+               },
+       },
+       {
+               .callback = can_skip_ioresource_align,
+               .ident = "IBM System x3850",
+               .matches = {
+                       DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
+                       DMI_MATCH(DMI_PRODUCT_NAME, "x3850"),
+               },
+       },
+       {
+               .callback = can_skip_ioresource_align,
+               .ident = "IBM System x3950",
+               .matches = {
+                       DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
+                       DMI_MATCH(DMI_PRODUCT_NAME, "x3950"),
+               },
+       },
+       {}
+};
+
+void __init dmi_check_skip_isa_align(void)
+{
+       dmi_check_system(can_skip_pciprobe_dmi_table);
+}
+
 /*
  *  Called after each bus is probed, but before its children
  *  are examined.
@@ -462,6 +506,9 @@ char * __devinit  pcibios_setup(char *str)
        } else if (!strcmp(str, "routeirq")) {
                pci_routeirq = 1;
                return NULL;
+       } else if (!strcmp(str, "skip_isa_align")) {
+               pci_probe |= PCI_CAN_SKIP_ISA_ALIGN;
+               return NULL;
        }
        return str;
 }

diff --git a/arch/x86/pci/init.c b/arch/x86/pci/init.c
index dd30c6076b5d74ff1be2929d7b8f84081c6a8250..b394b2a4b9129d80f6b1d3eff10b9ac346393b03 100644 (file)
--- a/arch/x86/pci/init.c
+++ b/arch/x86/pci/init.c
@@ -33,6 +33,8 @@ static __init int pci_access_init(void)
                printk(KERN_ERR
                "PCI: Fatal: No config space access function found\n");
 
+       dmi_check_skip_isa_align();
+
        return 0;
 }
 arch_initcall(pci_access_init);

diff --git a/arch/x86/pci/pci.h b/arch/x86/pci/pci.h
index c58805a92db5788e508482dd1579640c782750d0..10198202788137f845d7fb8ff202e93a07d3da80 100644 (file)
--- a/arch/x86/pci/pci.h
+++ b/arch/x86/pci/pci.h
@@ -38,6 +38,8 @@ enum pci_bf_sort_state {
        pci_dmi_bf,
 };
 
+extern void __init dmi_check_skip_isa_align(void);
+
 /* pci-i386.c */
 
 extern unsigned int pcibios_max_latency;