From f68c065491ceda1ad00f8dc493e274a79b8c2ba4 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 11 Oct 2007 11:17:12 +0200 Subject: x86_64: move pci Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar --- arch/x86/pci/Makefile | 2 +- arch/x86/pci/Makefile_64 | 17 +++++ arch/x86/pci/k8-bus_64.c | 83 ++++++++++++++++++++++++ arch/x86/pci/mmconfig_64.c | 157 +++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 258 insertions(+), 1 deletion(-) create mode 100644 arch/x86/pci/Makefile_64 create mode 100644 arch/x86/pci/k8-bus_64.c create mode 100644 arch/x86/pci/mmconfig_64.c (limited to 'arch/x86/pci') diff --git a/arch/x86/pci/Makefile b/arch/x86/pci/Makefile index b3e54c45d40..c5c8e485fc4 100644 --- a/arch/x86/pci/Makefile +++ b/arch/x86/pci/Makefile @@ -1,5 +1,5 @@ ifeq ($(CONFIG_X86_32),y) include ${srctree}/arch/x86/pci/Makefile_32 else -include ${srctree}/arch/x86_64/pci/Makefile_64 +include ${srctree}/arch/x86/pci/Makefile_64 endif diff --git a/arch/x86/pci/Makefile_64 b/arch/x86/pci/Makefile_64 new file mode 100644 index 00000000000..7d8c467bf14 --- /dev/null +++ b/arch/x86/pci/Makefile_64 @@ -0,0 +1,17 @@ +# +# Makefile for X86_64 specific PCI routines +# +# Reuse the i386 PCI subsystem +# +EXTRA_CFLAGS += -Iarch/x86/pci + +obj-y := i386.o +obj-$(CONFIG_PCI_DIRECT)+= direct.o +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_64.o direct.o mmconfig-shared.o + +obj-$(CONFIG_NUMA) += k8-bus_64.o + diff --git a/arch/x86/pci/k8-bus_64.c b/arch/x86/pci/k8-bus_64.c new file mode 100644 index 00000000000..9cc813e2970 --- /dev/null +++ b/arch/x86/pci/k8-bus_64.c @@ -0,0 +1,83 @@ +#include +#include +#include +#include + +/* + * This discovers the pcibus <-> node mapping on AMD K8. + * + * RED-PEN need to call this again on PCI hotplug + * RED-PEN empty cpus get reported wrong + */ + +#define NODE_ID_REGISTER 0x60 +#define NODE_ID(dword) (dword & 0x07) +#define LDT_BUS_NUMBER_REGISTER_0 0x94 +#define LDT_BUS_NUMBER_REGISTER_1 0xB4 +#define LDT_BUS_NUMBER_REGISTER_2 0xD4 +#define NR_LDT_BUS_NUMBER_REGISTERS 3 +#define SECONDARY_LDT_BUS_NUMBER(dword) ((dword >> 8) & 0xFF) +#define SUBORDINATE_LDT_BUS_NUMBER(dword) ((dword >> 16) & 0xFF) +#define PCI_DEVICE_ID_K8HTCONFIG 0x1100 + +/** + * fill_mp_bus_to_cpumask() + * fills the mp_bus_to_cpumask array based according to the LDT Bus Number + * Registers found in the K8 northbridge + */ +__init static int +fill_mp_bus_to_cpumask(void) +{ + struct pci_dev *nb_dev = NULL; + int i, j; + u32 ldtbus, nid; + static int lbnr[3] = { + LDT_BUS_NUMBER_REGISTER_0, + LDT_BUS_NUMBER_REGISTER_1, + LDT_BUS_NUMBER_REGISTER_2 + }; + + while ((nb_dev = pci_get_device(PCI_VENDOR_ID_AMD, + PCI_DEVICE_ID_K8HTCONFIG, nb_dev))) { + pci_read_config_dword(nb_dev, NODE_ID_REGISTER, &nid); + + for (i = 0; i < NR_LDT_BUS_NUMBER_REGISTERS; i++) { + pci_read_config_dword(nb_dev, lbnr[i], &ldtbus); + /* + * if there are no busses hanging off of the current + * ldt link then both the secondary and subordinate + * bus number fields are set to 0. + * + * RED-PEN + * This is slightly broken because it assumes + * HT node IDs == Linux node ids, which is not always + * true. However it is probably mostly true. + */ + if (!(SECONDARY_LDT_BUS_NUMBER(ldtbus) == 0 + && SUBORDINATE_LDT_BUS_NUMBER(ldtbus) == 0)) { + for (j = SECONDARY_LDT_BUS_NUMBER(ldtbus); + j <= SUBORDINATE_LDT_BUS_NUMBER(ldtbus); + j++) { + struct pci_bus *bus; + struct pci_sysdata *sd; + + long node = NODE_ID(nid); + /* Algorithm a bit dumb, but + it shouldn't matter here */ + bus = pci_find_bus(0, j); + if (!bus) + continue; + if (!node_online(node)) + node = 0; + + sd = bus->sysdata; + sd->node = node; + } + } + } + } + + return 0; +} + +fs_initcall(fill_mp_bus_to_cpumask); diff --git a/arch/x86/pci/mmconfig_64.c b/arch/x86/pci/mmconfig_64.c new file mode 100644 index 00000000000..4095e4d66a1 --- /dev/null +++ b/arch/x86/pci/mmconfig_64.c @@ -0,0 +1,157 @@ +/* + * mmconfig.c - Low-level direct PCI config space access via MMCONFIG + * + * This is an 64bit optimized version that always keeps the full mmconfig + * space mapped. This allows lockless config space operation. + */ + +#include +#include +#include +#include +#include + +#include "pci.h" + +/* Static virtual mapping of the MMCONFIG aperture */ +struct mmcfg_virt { + struct acpi_mcfg_allocation *cfg; + char __iomem *virt; +}; +static struct mmcfg_virt *pci_mmcfg_virt; + +static char __iomem *get_virt(unsigned int seg, unsigned bus) +{ + struct acpi_mcfg_allocation *cfg; + int cfg_num; + + for (cfg_num = 0; cfg_num < pci_mmcfg_config_num; cfg_num++) { + cfg = pci_mmcfg_virt[cfg_num].cfg; + if (cfg->pci_segment == seg && + (cfg->start_bus_number <= bus) && + (cfg->end_bus_number >= bus)) + return pci_mmcfg_virt[cfg_num].virt; + } + + /* Fall back to type 0 */ + return NULL; +} + +static char __iomem *pci_dev_base(unsigned int seg, unsigned int bus, unsigned int devfn) +{ + char __iomem *addr; + 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) + return NULL; + return addr + ((bus << 20) | (devfn << 12)); +} + +static int pci_mmcfg_read(unsigned int seg, unsigned int bus, + unsigned int devfn, int reg, int len, u32 *value) +{ + char __iomem *addr; + + /* Why do we have this when nobody checks it. How about a BUG()!? -AK */ + if (unlikely((bus > 255) || (devfn > 255) || (reg > 4095))) { + *value = -1; + return -EINVAL; + } + + addr = pci_dev_base(seg, bus, devfn); + if (!addr) + return pci_conf1_read(seg,bus,devfn,reg,len,value); + + switch (len) { + case 1: + *value = mmio_config_readb(addr + reg); + break; + case 2: + *value = mmio_config_readw(addr + reg); + break; + case 4: + *value = mmio_config_readl(addr + reg); + break; + } + + return 0; +} + +static int pci_mmcfg_write(unsigned int seg, unsigned int bus, + unsigned int devfn, int reg, int len, u32 value) +{ + char __iomem *addr; + + /* Why do we have this when nobody checks it. How about a BUG()!? -AK */ + if (unlikely((bus > 255) || (devfn > 255) || (reg > 4095))) + return -EINVAL; + + addr = pci_dev_base(seg, bus, devfn); + if (!addr) + return pci_conf1_write(seg,bus,devfn,reg,len,value); + + switch (len) { + case 1: + mmio_config_writeb(addr + reg, value); + break; + case 2: + mmio_config_writew(addr + reg, value); + break; + case 4: + mmio_config_writel(addr + reg, value); + break; + } + + return 0; +} + +static struct pci_raw_ops pci_mmcfg = { + .read = pci_mmcfg_read, + .write = pci_mmcfg_write, +}; + +static void __iomem * __init mcfg_ioremap(struct acpi_mcfg_allocation *cfg) +{ + void __iomem *addr; + u32 size; + + size = (cfg->end_bus_number + 1) << 20; + addr = ioremap_nocache(cfg->address, size); + if (addr) { + printk(KERN_INFO "PCI: Using MMCONFIG at %Lx - %Lx\n", + cfg->address, cfg->address + size - 1); + } + return addr; +} + +int __init pci_mmcfg_arch_reachable(unsigned int seg, unsigned int bus, + unsigned int devfn) +{ + return pci_dev_base(seg, bus, devfn) != NULL; +} + +int __init pci_mmcfg_arch_init(void) +{ + int i; + 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 0; + } + + for (i = 0; i < pci_mmcfg_config_num; ++i) { + pci_mmcfg_virt[i].cfg = &pci_mmcfg_config[i]; + pci_mmcfg_virt[i].virt = mcfg_ioremap(&pci_mmcfg_config[i]); + if (!pci_mmcfg_virt[i].virt) { + printk(KERN_ERR "PCI: Cannot map mmconfig aperture for " + "segment %d\n", + pci_mmcfg_config[i].pci_segment); + return 0; + } + } + raw_pci_ops = &pci_mmcfg; + return 1; +} -- cgit v1.2.3