forked from Minki/linux
x86: seperate mmconf for fam10h out from setup_64.c
Separate mmconf for fam10h out from setup_64.c Signed-off-by: Yinghai Lu <yinghai.lu@sun.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Yinghai Lu
Ingo Molnar
parent
d4c4d09415
commit
d39398a333
@ -99,4 +99,6 @@ ifeq ($(CONFIG_X86_64),y)
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obj-$(CONFIG_GART_IOMMU) += pci-gart_64.o aperture_64.o
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obj-$(CONFIG_CALGARY_IOMMU) += pci-calgary_64.o tce_64.o
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obj-$(CONFIG_SWIOTLB) += pci-swiotlb_64.o
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obj-$(CONFIG_PCI_MMCONFIG) += mmconf-fam10h_64.o
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endif
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215
arch/x86/kernel/mmconf-fam10h_64.c
Normal file
215
arch/x86/kernel/mmconf-fam10h_64.c
Normal file
@ -0,0 +1,215 @@
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/*
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* AMD Family 10h mmconfig enablement
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*/
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#include <linux/types.h>
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#include <linux/mm.h>
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#include <linux/string.h>
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#include <linux/pci.h>
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#include <asm/pci-direct.h>
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#include <linux/sort.h>
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#include <asm/io.h>
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#include <asm/msr.h>
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#include <asm/acpi.h>
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struct pci_hostbridge_probe {
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u32 bus;
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u32 slot;
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u32 vendor;
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u32 device;
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};
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static u64 __cpuinitdata fam10h_pci_mmconf_base;
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static int __cpuinitdata fam10h_pci_mmconf_base_status;
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static struct pci_hostbridge_probe pci_probes[] __cpuinitdata = {
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{ 0, 0x18, PCI_VENDOR_ID_AMD, 0x1200 },
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{ 0xff, 0, PCI_VENDOR_ID_AMD, 0x1200 },
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};
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struct range {
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u64 start;
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u64 end;
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};
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static int __cpuinit cmp_range(const void *x1, const void *x2)
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{
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const struct range *r1 = x1;
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const struct range *r2 = x2;
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int start1, start2;
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start1 = r1->start >> 32;
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start2 = r2->start >> 32;
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return start1 - start2;
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}
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/*[47:0] */
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/* need to avoid (0xfd<<32) and (0xfe<<32), ht used space */
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#define FAM10H_PCI_MMCONF_BASE (0xfcULL<<32)
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#define BASE_VALID(b) ((b != (0xfdULL << 32)) && (b != (0xfeULL << 32)))
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static void __cpuinit get_fam10h_pci_mmconf_base(void)
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{
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int i;
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unsigned bus;
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unsigned slot;
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int found;
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u64 val;
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u32 address;
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u64 tom2;
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u64 base = FAM10H_PCI_MMCONF_BASE;
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int hi_mmio_num;
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struct range range[8];
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/* only try to get setting from BSP */
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/* -1 or 1 */
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if (fam10h_pci_mmconf_base_status)
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return;
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if (!early_pci_allowed())
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goto fail;
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found = 0;
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for (i = 0; i < ARRAY_SIZE(pci_probes); i++) {
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u32 id;
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u16 device;
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u16 vendor;
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bus = pci_probes[i].bus;
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slot = pci_probes[i].slot;
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id = read_pci_config(bus, slot, 0, PCI_VENDOR_ID);
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vendor = id & 0xffff;
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device = (id>>16) & 0xffff;
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if (pci_probes[i].vendor == vendor &&
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pci_probes[i].device == device) {
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found = 1;
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break;
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}
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}
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if (!found)
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goto fail;
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/* SYS_CFG */
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address = MSR_K8_SYSCFG;
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rdmsrl(address, val);
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/* TOP_MEM2 is not enabled? */
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if (!(val & (1<<21))) {
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tom2 = 0;
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} else {
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/* TOP_MEM2 */
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address = MSR_K8_TOP_MEM2;
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rdmsrl(address, val);
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tom2 = val & (0xffffULL<<32);
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}
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if (base <= tom2)
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base = tom2 + (1ULL<<32);
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/*
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* need to check if the range is in the high mmio range that is
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* above 4G
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*/
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hi_mmio_num = 0;
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for (i = 0; i < 8; i++) {
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u32 reg;
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u64 start;
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u64 end;
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reg = read_pci_config(bus, slot, 1, 0x80 + (i << 3));
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if (!(reg & 3))
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continue;
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start = (((u64)reg) << 8) & (0xffULL << 32); /* 39:16 on 31:8*/
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reg = read_pci_config(bus, slot, 1, 0x84 + (i << 3));
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end = (((u64)reg) << 8) & (0xffULL << 32); /* 39:16 on 31:8*/
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if (!end)
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continue;
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range[hi_mmio_num].start = start;
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range[hi_mmio_num].end = end;
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hi_mmio_num++;
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}
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if (!hi_mmio_num)
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goto out;
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/* sort the range */
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sort(range, hi_mmio_num, sizeof(struct range), cmp_range, NULL);
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if (range[hi_mmio_num - 1].end < base)
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goto out;
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if (range[0].start > base)
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goto out;
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/* need to find one window */
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base = range[0].start - (1ULL << 32);
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if ((base > tom2) && BASE_VALID(base))
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goto out;
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base = range[hi_mmio_num - 1].end + (1ULL << 32);
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if ((base > tom2) && BASE_VALID(base))
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goto out;
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/* need to find window between ranges */
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if (hi_mmio_num > 1)
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for (i = 0; i < hi_mmio_num - 1; i++) {
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if (range[i + 1].start > (range[i].end + (1ULL << 32))) {
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base = range[i].end + (1ULL << 32);
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if ((base > tom2) && BASE_VALID(base))
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goto out;
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}
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}
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fail:
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fam10h_pci_mmconf_base_status = -1;
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return;
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out:
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fam10h_pci_mmconf_base = base;
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fam10h_pci_mmconf_base_status = 1;
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}
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void __cpuinit fam10h_check_enable_mmcfg(void)
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{
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u64 val;
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u32 address;
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address = MSR_FAM10H_MMIO_CONF_BASE;
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rdmsrl(address, val);
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/* try to make sure that AP's setting is identical to BSP setting */
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if (val & FAM10H_MMIO_CONF_ENABLE) {
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unsigned busnbits;
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busnbits = (val >> FAM10H_MMIO_CONF_BUSRANGE_SHIFT) &
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FAM10H_MMIO_CONF_BUSRANGE_MASK;
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/* only trust the one handle 256 buses, if acpi=off */
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if (!acpi_pci_disabled || busnbits >= 8) {
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u64 base;
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base = val & (0xffffULL << 32);
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if (fam10h_pci_mmconf_base_status <= 0) {
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fam10h_pci_mmconf_base = base;
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fam10h_pci_mmconf_base_status = 1;
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return;
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} else if (fam10h_pci_mmconf_base == base)
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return;
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}
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}
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/*
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* if it is not enabled, try to enable it and assume only one segment
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* with 256 buses
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*/
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get_fam10h_pci_mmconf_base();
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if (fam10h_pci_mmconf_base_status <= 0)
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return;
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printk(KERN_INFO "Enable MMCONFIG on AMD Family 10h\n");
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val &= ~((FAM10H_MMIO_CONF_BASE_MASK<<FAM10H_MMIO_CONF_BASE_SHIFT) |
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(FAM10H_MMIO_CONF_BUSRANGE_MASK<<FAM10H_MMIO_CONF_BUSRANGE_SHIFT));
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val |= fam10h_pci_mmconf_base | (8 << FAM10H_MMIO_CONF_BUSRANGE_SHIFT) |
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FAM10H_MMIO_CONF_ENABLE;
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wrmsrl(address, val);
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}
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@ -579,212 +579,6 @@ static int __cpuinit nearby_node(int apicid)
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}
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#endif
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#ifdef CONFIG_PCI_MMCONFIG
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struct pci_hostbridge_probe {
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u32 bus;
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u32 slot;
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u32 vendor;
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u32 device;
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};
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static u64 __cpuinitdata fam10h_pci_mmconf_base;
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static int __cpuinitdata fam10h_pci_mmconf_base_status;
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static struct pci_hostbridge_probe pci_probes[] __cpuinitdata = {
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{ 0, 0x18, PCI_VENDOR_ID_AMD, 0x1200 },
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{ 0xff, 0, PCI_VENDOR_ID_AMD, 0x1200 },
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};
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struct range {
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u64 start;
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u64 end;
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};
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static int __cpuinit cmp_range(const void *x1, const void *x2)
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{
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const struct range *r1 = x1;
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const struct range *r2 = x2;
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int start1, start2;
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start1 = r1->start >> 32;
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start2 = r2->start >> 32;
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return start1 - start2;
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}
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/*[47:0] */
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/* need to avoid (0xfd<<32) and (0xfe<<32), ht used space */
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#define FAM10H_PCI_MMCONF_BASE (0xfcULL<<32)
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#define BASE_VALID(b) ((b != (0xfdULL << 32)) && (b != (0xfeULL << 32)))
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static void __cpuinit get_fam10h_pci_mmconf_base(void)
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{
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int i;
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unsigned bus;
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unsigned slot;
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int found;
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u64 val;
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u32 address;
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u64 tom2;
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u64 base = FAM10H_PCI_MMCONF_BASE;
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int hi_mmio_num;
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struct range range[8];
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/* only try to get setting from BSP */
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/* -1 or 1 */
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if (fam10h_pci_mmconf_base_status)
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return;
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if (!early_pci_allowed())
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goto fail;
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found = 0;
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for (i = 0; i < ARRAY_SIZE(pci_probes); i++) {
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u32 id;
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u16 device;
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u16 vendor;
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bus = pci_probes[i].bus;
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slot = pci_probes[i].slot;
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id = read_pci_config(bus, slot, 0, PCI_VENDOR_ID);
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vendor = id & 0xffff;
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device = (id>>16) & 0xffff;
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if (pci_probes[i].vendor == vendor &&
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pci_probes[i].device == device) {
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found = 1;
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break;
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}
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}
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if (!found)
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goto fail;
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/* SYS_CFG */
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address = MSR_K8_SYSCFG;
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rdmsrl(address, val);
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/* TOP_MEM2 is not enabled? */
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if (!(val & (1<<21))) {
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tom2 = 0;
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} else {
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/* TOP_MEM2 */
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address = MSR_K8_TOP_MEM2;
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rdmsrl(address, val);
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tom2 = val & (0xffffULL<<32);
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}
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if (base <= tom2)
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base = tom2 + (1ULL<<32);
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/*
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* need to check if the range is in the high mmio range that is
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* above 4G
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*/
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hi_mmio_num = 0;
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for (i = 0; i < 8; i++) {
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u32 reg;
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u64 start;
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u64 end;
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reg = read_pci_config(bus, slot, 1, 0x80 + (i << 3));
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if (!(reg & 3))
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continue;
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start = (((u64)reg) << 8) & (0xffULL << 32); /* 39:16 on 31:8*/
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reg = read_pci_config(bus, slot, 1, 0x84 + (i << 3));
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end = (((u64)reg) << 8) & (0xffULL << 32); /* 39:16 on 31:8*/
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if (!end)
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continue;
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range[hi_mmio_num].start = start;
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range[hi_mmio_num].end = end;
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hi_mmio_num++;
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}
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if (!hi_mmio_num)
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goto out;
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/* sort the range */
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sort(range, hi_mmio_num, sizeof(struct range), cmp_range, NULL);
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if (range[hi_mmio_num - 1].end < base)
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goto out;
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if (range[0].start > base)
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goto out;
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/* need to find one window */
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base = range[0].start - (1ULL << 32);
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if ((base > tom2) && BASE_VALID(base))
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goto out;
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base = range[hi_mmio_num - 1].end + (1ULL << 32);
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if ((base > tom2) && BASE_VALID(base))
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goto out;
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/* need to find window between ranges */
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if (hi_mmio_num > 1)
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for (i = 0; i < hi_mmio_num - 1; i++) {
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if (range[i + 1].start > (range[i].end + (1ULL << 32))) {
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base = range[i].end + (1ULL << 32);
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if ((base > tom2) && BASE_VALID(base))
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goto out;
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}
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}
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fail:
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fam10h_pci_mmconf_base_status = -1;
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return;
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out:
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fam10h_pci_mmconf_base = base;
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fam10h_pci_mmconf_base_status = 1;
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}
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#endif
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static void __cpuinit fam10h_check_enable_mmcfg(struct cpuinfo_x86 *c)
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{
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#ifdef CONFIG_PCI_MMCONFIG
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u64 val;
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u32 address;
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address = MSR_FAM10H_MMIO_CONF_BASE;
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rdmsrl(address, val);
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/* try to make sure that AP's setting is identical to BSP setting */
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if (val & FAM10H_MMIO_CONF_ENABLE) {
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unsigned busnbits;
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busnbits = (val >> FAM10H_MMIO_CONF_BUSRANGE_SHIFT) &
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FAM10H_MMIO_CONF_BUSRANGE_MASK;
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/* only trust the one handle 256 buses, if acpi=off */
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if (!acpi_pci_disabled || busnbits >= 8) {
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u64 base;
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base = val & (0xffffULL << 32);
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if (fam10h_pci_mmconf_base_status <= 0) {
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fam10h_pci_mmconf_base = base;
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fam10h_pci_mmconf_base_status = 1;
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return;
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} else if (fam10h_pci_mmconf_base == base)
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return;
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}
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}
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/*
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* if it is not enabled, try to enable it and assume only one segment
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* with 256 buses
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*/
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get_fam10h_pci_mmconf_base();
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if (fam10h_pci_mmconf_base_status <= 0)
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return;
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printk(KERN_INFO "Enable MMCONFIG on AMD Family 10h\n");
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val &= ~((FAM10H_MMIO_CONF_BASE_MASK<<FAM10H_MMIO_CONF_BASE_SHIFT) |
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(FAM10H_MMIO_CONF_BUSRANGE_MASK<<FAM10H_MMIO_CONF_BUSRANGE_SHIFT));
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val |= fam10h_pci_mmconf_base | (8 << FAM10H_MMIO_CONF_BUSRANGE_SHIFT) |
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FAM10H_MMIO_CONF_ENABLE;
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wrmsrl(address, val);
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#endif
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}
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/*
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* On a AMD dual core setup the lower bits of the APIC id distingush the cores.
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* Assumes number of cores is a power of two.
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@ -903,6 +697,14 @@ static void __cpuinit early_init_amd(struct cpuinfo_x86 *c)
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set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
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}
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#ifdef CONFIG_PCI_MMCONFIG
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extern void __cpuinit fam10h_check_enable_mmcfg(void);
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#else
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void __cpuinit fam10h_check_enable_mmcfg(void)
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{
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}
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#endif
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static void __cpuinit init_amd(struct cpuinfo_x86 *c)
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{
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unsigned level;
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@ -969,7 +771,7 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
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set_cpu_cap(c, X86_FEATURE_MFENCE_RDTSC);
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if (c->x86 == 0x10)
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fam10h_check_enable_mmcfg(c);
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fam10h_check_enable_mmcfg();
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if (amd_apic_timer_broken())
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disable_apic_timer = 1;
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