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Subject[PATCH] x86_64: Seperate mmconf for fam10h out from setup_64.c
Seperate mmconf for fam10h out from setup_64.c

Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>

diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index 199f8b5..4f2b9ed 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -101,4 +101,6 @@ ifeq ($(CONFIG_X86_64),y)
obj-$(CONFIG_GART_IOMMU) += pci-gart_64.o aperture_64.o
obj-$(CONFIG_CALGARY_IOMMU) += pci-calgary_64.o tce_64.o
obj-$(CONFIG_SWIOTLB) += pci-swiotlb_64.o
+
+ obj-$(CONFIG_PCI_MMCONFIG) += mmconf-fam10h_64.o
endif
diff --git a/arch/x86/kernel/mmconf-fam10h_64.c b/arch/x86/kernel/mmconf-fam10h_64.c
new file mode 100644
index 0000000..3789792
--- /dev/null
+++ b/arch/x86/kernel/mmconf-fam10h_64.c
@@ -0,0 +1,215 @@
+/*
+ * AMD Family 10h mmconfig enablement
+ */
+
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/pci.h>
+#include <asm/pci-direct.h>
+#include <linux/sort.h>
+#include <asm/io.h>
+#include <asm/msr.h>
+#include <asm/acpi.h>
+
+struct pci_hostbridge_probe {
+ u32 bus;
+ u32 slot;
+ u32 vendor;
+ u32 device;
+};
+
+static u64 __cpuinitdata fam10h_pci_mmconf_base;
+static int __cpuinitdata fam10h_pci_mmconf_base_status;
+
+static struct pci_hostbridge_probe pci_probes[] __cpuinitdata = {
+ { 0, 0x18, PCI_VENDOR_ID_AMD, 0x1200 },
+ { 0xff, 0, PCI_VENDOR_ID_AMD, 0x1200 },
+};
+
+struct range {
+ u64 start;
+ u64 end;
+};
+
+static int __cpuinit cmp_range(const void *x1, const void *x2)
+{
+ const struct range *r1 = x1;
+ const struct range *r2 = x2;
+ int start1, start2;
+
+ start1 = r1->start >> 32;
+ start2 = r2->start >> 32;
+
+ return start1 - start2;
+}
+
+/*[47:0] */
+/* need to avoid (0xfd<<32) and (0xfe<<32), ht used space */
+#define FAM10H_PCI_MMCONF_BASE (0xfcULL<<32)
+#define BASE_VALID(b) ((b != (0xfdULL << 32)) && (b != (0xfeULL << 32)))
+static void __cpuinit get_fam10h_pci_mmconf_base(void)
+{
+ int i;
+ unsigned bus;
+ unsigned slot;
+ int found;
+
+ u64 val;
+ u32 address;
+ u64 tom2;
+ u64 base = FAM10H_PCI_MMCONF_BASE;
+
+ int hi_mmio_num;
+ struct range range[8];
+
+ /* only try to get setting from BSP */
+ /* -1 or 1 */
+ if (fam10h_pci_mmconf_base_status)
+ return;
+
+ if (!early_pci_allowed())
+ goto fail;
+
+ found = 0;
+ for (i = 0; i < ARRAY_SIZE(pci_probes); i++) {
+ u32 id;
+ u16 device;
+ u16 vendor;
+
+ bus = pci_probes[i].bus;
+ slot = pci_probes[i].slot;
+ id = read_pci_config(bus, slot, 0, PCI_VENDOR_ID);
+
+ vendor = id & 0xffff;
+ device = (id>>16) & 0xffff;
+ if (pci_probes[i].vendor == vendor &&
+ pci_probes[i].device == device) {
+ found = 1;
+ break;
+ }
+ }
+
+ if (!found)
+ goto fail;
+
+ /* SYS_CFG */
+ address = MSR_K8_SYSCFG;
+ rdmsrl(address, val);
+
+ /* TOP_MEM2 is not enabled? */
+ if (!(val & (1<<21))) {
+ tom2 = 0;
+ } else {
+ /* TOP_MEM2 */
+ address = MSR_K8_TOP_MEM2;
+ rdmsrl(address, val);
+ tom2 = val & (0xffffULL<<32);
+ }
+
+ if (base <= tom2)
+ base = tom2 + (1ULL<<32);
+
+ /*
+ * need to check if the range is in the high mmio range that is
+ * above 4G
+ */
+ hi_mmio_num = 0;
+ for (i = 0; i < 8; i++) {
+ u32 reg;
+ u64 start;
+ u64 end;
+ reg = read_pci_config(bus, slot, 1, 0x80 + (i << 3));
+ if (!(reg & 3))
+ continue;
+
+ start = (((u64)reg) << 8) & (0xffULL << 32); /* 39:16 on 31:8*/
+ reg = read_pci_config(bus, slot, 1, 0x84 + (i << 3));
+ end = (((u64)reg) << 8) & (0xffULL << 32); /* 39:16 on 31:8*/
+
+ if (!end)
+ continue;
+
+ range[hi_mmio_num].start = start;
+ range[hi_mmio_num].end = end;
+ hi_mmio_num++;
+ }
+
+ if (!hi_mmio_num)
+ goto out;
+
+ /* sort the range */
+ sort(range, hi_mmio_num, sizeof(struct range), cmp_range, NULL);
+
+ if (range[hi_mmio_num - 1].end < base)
+ goto out;
+ if (range[0].start > base)
+ goto out;
+
+ /* need to find one window */
+ base = range[0].start - (1ULL << 32);
+ if ((base > tom2) && BASE_VALID(base))
+ goto out;
+ base = range[hi_mmio_num - 1].end + (1ULL << 32);
+ if ((base > tom2) && BASE_VALID(base))
+ goto out;
+ /* need to find window between ranges */
+ if (hi_mmio_num > 1)
+ for (i = 0; i < hi_mmio_num - 1; i++) {
+ if (range[i + 1].start > (range[i].end + (1ULL << 32))) {
+ base = range[i].end + (1ULL << 32);
+ if ((base > tom2) && BASE_VALID(base))
+ goto out;
+ }
+ }
+
+fail:
+ fam10h_pci_mmconf_base_status = -1;
+ return;
+out:
+ fam10h_pci_mmconf_base = base;
+ fam10h_pci_mmconf_base_status = 1;
+}
+
+void __cpuinit fam10h_check_enable_mmcfg(void)
+{
+ u64 val;
+ u32 address;
+
+ address = MSR_FAM10H_MMIO_CONF_BASE;
+ rdmsrl(address, val);
+
+ /* try to make sure that AP's setting is identical to BSP setting */
+ if (val & FAM10H_MMIO_CONF_ENABLE) {
+ unsigned busnbits;
+ busnbits = (val >> FAM10H_MMIO_CONF_BUSRANGE_SHIFT) &
+ FAM10H_MMIO_CONF_BUSRANGE_MASK;
+
+ /* only trust the one handle 256 buses, if acpi=off */
+ if (!acpi_pci_disabled || busnbits >= 8) {
+ u64 base;
+ base = val & (0xffffULL << 32);
+ if (fam10h_pci_mmconf_base_status <= 0) {
+ fam10h_pci_mmconf_base = base;
+ fam10h_pci_mmconf_base_status = 1;
+ return;
+ } else if (fam10h_pci_mmconf_base == base)
+ return;
+ }
+ }
+
+ /*
+ * if it is not enabled, try to enable it and assume only one segment
+ * with 256 buses
+ */
+ get_fam10h_pci_mmconf_base();
+ if (fam10h_pci_mmconf_base_status <= 0)
+ return;
+
+ printk(KERN_INFO "Enable MMCONFIG on AMD Family 10h\n");
+ val &= ~((FAM10H_MMIO_CONF_BASE_MASK<<FAM10H_MMIO_CONF_BASE_SHIFT) |
+ (FAM10H_MMIO_CONF_BUSRANGE_MASK<<FAM10H_MMIO_CONF_BUSRANGE_SHIFT));
+ val |= fam10h_pci_mmconf_base | (8 << FAM10H_MMIO_CONF_BUSRANGE_SHIFT) |
+ FAM10H_MMIO_CONF_ENABLE;
+ wrmsrl(address, val);
+}
diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c
index d327155..d71463e 100644
--- a/arch/x86/kernel/setup_64.c
+++ b/arch/x86/kernel/setup_64.c
@@ -548,212 +548,6 @@ static int __cpuinit nearby_node(int apicid)
}
#endif

-#ifdef CONFIG_PCI_MMCONFIG
-struct pci_hostbridge_probe {
- u32 bus;
- u32 slot;
- u32 vendor;
- u32 device;
-};
-
-static u64 __cpuinitdata fam10h_pci_mmconf_base;
-static int __cpuinitdata fam10h_pci_mmconf_base_status;
-
-static struct pci_hostbridge_probe pci_probes[] __cpuinitdata = {
- { 0, 0x18, PCI_VENDOR_ID_AMD, 0x1200 },
- { 0xff, 0, PCI_VENDOR_ID_AMD, 0x1200 },
-};
-
-struct range {
- u64 start;
- u64 end;
-};
-
-static int __cpuinit cmp_range(const void *x1, const void *x2)
-{
- const struct range *r1 = x1;
- const struct range *r2 = x2;
- int start1, start2;
-
- start1 = r1->start >> 32;
- start2 = r2->start >> 32;
-
- return start1 - start2;
-}
-
-/*[47:0] */
-/* need to avoid (0xfd<<32) and (0xfe<<32), ht used space */
-#define FAM10H_PCI_MMCONF_BASE (0xfcULL<<32)
-#define BASE_VALID(b) ((b != (0xfdULL << 32)) && (b != (0xfeULL << 32)))
-static void __cpuinit get_fam10h_pci_mmconf_base(void)
-{
- int i;
- unsigned bus;
- unsigned slot;
- int found;
-
- u64 val;
- u32 address;
- u64 tom2;
- u64 base = FAM10H_PCI_MMCONF_BASE;
-
- int hi_mmio_num;
- struct range range[8];
-
- /* only try to get setting from BSP */
- /* -1 or 1 */
- if (fam10h_pci_mmconf_base_status)
- return;
-
- if (!early_pci_allowed())
- goto fail;
-
- found = 0;
- for (i = 0; i < ARRAY_SIZE(pci_probes); i++) {
- u32 id;
- u16 device;
- u16 vendor;
-
- bus = pci_probes[i].bus;
- slot = pci_probes[i].slot;
- id = read_pci_config(bus, slot, 0, PCI_VENDOR_ID);
-
- vendor = id & 0xffff;
- device = (id>>16) & 0xffff;
- if (pci_probes[i].vendor == vendor &&
- pci_probes[i].device == device) {
- found = 1;
- break;
- }
- }
-
- if (!found)
- goto fail;
-
- /* SYS_CFG */
- address = MSR_K8_SYSCFG;
- rdmsrl(address, val);
-
- /* TOP_MEM2 is not enabled? */
- if (!(val & (1<<21))) {
- tom2 = 0;
- } else {
- /* TOP_MEM2 */
- address = MSR_K8_TOP_MEM2;
- rdmsrl(address, val);
- tom2 = val & (0xffffULL<<32);
- }
-
- if (base <= tom2)
- base = tom2 + (1ULL<<32);
-
- /*
- * need to check if the range is in the high mmio range that is
- * above 4G
- */
- hi_mmio_num = 0;
- for (i = 0; i < 8; i++) {
- u32 reg;
- u64 start;
- u64 end;
- reg = read_pci_config(bus, slot, 1, 0x80 + (i << 3));
- if (!(reg & 3))
- continue;
-
- start = (((u64)reg) << 8) & (0xffULL << 32); /* 39:16 on 31:8*/
- reg = read_pci_config(bus, slot, 1, 0x84 + (i << 3));
- end = (((u64)reg) << 8) & (0xffULL << 32); /* 39:16 on 31:8*/
-
- if (!end)
- continue;
-
- range[hi_mmio_num].start = start;
- range[hi_mmio_num].end = end;
- hi_mmio_num++;
- }
-
- if (!hi_mmio_num)
- goto out;
-
- /* sort the range */
- sort(range, hi_mmio_num, sizeof(struct range), cmp_range, NULL);
-
- if (range[hi_mmio_num - 1].end < base)
- goto out;
- if (range[0].start > base)
- goto out;
-
- /* need to find one window */
- base = range[0].start - (1ULL << 32);
- if ((base > tom2) && BASE_VALID(base))
- goto out;
- base = range[hi_mmio_num - 1].end + (1ULL << 32);
- if ((base > tom2) && BASE_VALID(base))
- goto out;
- /* need to find window between ranges */
- if (hi_mmio_num > 1)
- for (i = 0; i < hi_mmio_num - 1; i++) {
- if (range[i + 1].start > (range[i].end + (1ULL << 32))) {
- base = range[i].end + (1ULL << 32);
- if ((base > tom2) && BASE_VALID(base))
- goto out;
- }
- }
-
-fail:
- fam10h_pci_mmconf_base_status = -1;
- return;
-out:
- fam10h_pci_mmconf_base = base;
- fam10h_pci_mmconf_base_status = 1;
-}
-#endif
-
-static void __cpuinit fam10h_check_enable_mmcfg(struct cpuinfo_x86 *c)
-{
-#ifdef CONFIG_PCI_MMCONFIG
- u64 val;
- u32 address;
-
- address = MSR_FAM10H_MMIO_CONF_BASE;
- rdmsrl(address, val);
-
- /* try to make sure that AP's setting is identical to BSP setting */
- if (val & FAM10H_MMIO_CONF_ENABLE) {
- unsigned busnbits;
- busnbits = (val >> FAM10H_MMIO_CONF_BUSRANGE_SHIFT) &
- FAM10H_MMIO_CONF_BUSRANGE_MASK;
-
- /* only trust the one handle 256 buses, if acpi=off */
- if (!acpi_pci_disabled || busnbits >= 8) {
- u64 base;
- base = val & (0xffffULL << 32);
- if (fam10h_pci_mmconf_base_status <= 0) {
- fam10h_pci_mmconf_base = base;
- fam10h_pci_mmconf_base_status = 1;
- return;
- } else if (fam10h_pci_mmconf_base == base)
- return;
- }
- }
-
- /*
- * if it is not enabled, try to enable it and assume only one segment
- * with 256 buses
- */
- get_fam10h_pci_mmconf_base();
- if (fam10h_pci_mmconf_base_status <= 0)
- return;
-
- printk(KERN_INFO "Enable MMCONFIG on AMD Family 10h\n");
- val &= ~((FAM10H_MMIO_CONF_BASE_MASK<<FAM10H_MMIO_CONF_BASE_SHIFT) |
- (FAM10H_MMIO_CONF_BUSRANGE_MASK<<FAM10H_MMIO_CONF_BUSRANGE_SHIFT));
- val |= fam10h_pci_mmconf_base | (8 << FAM10H_MMIO_CONF_BUSRANGE_SHIFT) |
- FAM10H_MMIO_CONF_ENABLE;
- wrmsrl(address, val);
-#endif
-}
-
/*
* On a AMD dual core setup the lower bits of the APIC id distingush the cores.
* Assumes number of cores is a power of two.
@@ -872,6 +666,14 @@ static void __cpuinit early_init_amd(struct cpuinfo_x86 *c)
set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
}

+#ifdef CONFIG_PCI_MMCONFIG
+extern void __cpuinit fam10h_check_enable_mmcfg(void);
+#else
+void __cpuinit fam10h_check_enable_mmcfg(void)
+{
+}
+#endif
+
static void __cpuinit init_amd(struct cpuinfo_x86 *c)
{
unsigned level;
@@ -938,7 +740,7 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
set_cpu_cap(c, X86_FEATURE_MFENCE_RDTSC);

if (c->x86 == 0x10)
- fam10h_check_enable_mmcfg(c);
+ fam10h_check_enable_mmcfg();

if (amd_apic_timer_broken())
disable_apic_timer = 1;

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