aboutsummaryrefslogtreecommitdiff
path: root/arch/x86_64/pci
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/x86_64/pci
downloadlinux-stericsson-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/x86_64/pci')
-rw-r--r--arch/x86_64/pci/Makefile24
-rw-r--r--arch/x86_64/pci/Makefile-BUS22
-rw-r--r--arch/x86_64/pci/k8-bus.c78
-rw-r--r--arch/x86_64/pci/mmconfig.c104
4 files changed, 228 insertions, 0 deletions
diff --git a/arch/x86_64/pci/Makefile b/arch/x86_64/pci/Makefile
new file mode 100644
index 000000000000..37c92e841dec
--- /dev/null
+++ b/arch/x86_64/pci/Makefile
@@ -0,0 +1,24 @@
+#
+# Makefile for X86_64 specific PCI routines
+#
+# Reuse the i386 PCI subsystem
+#
+CFLAGS += -Iarch/i386/pci
+
+obj-y := i386.o
+obj-$(CONFIG_PCI_DIRECT)+= direct.o
+obj-y += fixup.o
+obj-$(CONFIG_ACPI_PCI) += acpi.o
+obj-y += legacy.o irq.o common.o
+# mmconfig has a 64bit special
+obj-$(CONFIG_PCI_MMCONFIG) += mmconfig.o
+
+obj-$(CONFIG_NUMA) += k8-bus.o
+
+direct-y += ../../i386/pci/direct.o
+acpi-y += ../../i386/pci/acpi.o
+legacy-y += ../../i386/pci/legacy.o
+irq-y += ../../i386/pci/irq.o
+common-y += ../../i386/pci/common.o
+fixup-y += ../../i386/pci/fixup.o
+i386-y += ../../i386/pci/i386.o
diff --git a/arch/x86_64/pci/Makefile-BUS b/arch/x86_64/pci/Makefile-BUS
new file mode 100644
index 000000000000..291985f0d2e4
--- /dev/null
+++ b/arch/x86_64/pci/Makefile-BUS
@@ -0,0 +1,22 @@
+#
+# Makefile for X86_64 specific PCI routines
+#
+# Reuse the i386 PCI subsystem
+#
+CFLAGS += -I arch/i386/pci
+
+obj-y := i386.o
+obj-$(CONFIG_PCI_DIRECT)+= direct.o
+obj-y += fixup.o
+obj-$(CONFIG_ACPI_PCI) += acpi.o
+obj-y += legacy.o irq.o common.o
+# mmconfig has a 64bit special
+obj-$(CONFIG_PCI_MMCONFIG) += mmconfig.o
+
+direct-y += ../../i386/pci/direct.o
+acpi-y += ../../i386/pci/acpi.o
+legacy-y += ../../i386/pci/legacy.o
+irq-y += ../../i386/pci/irq.o
+common-y += ../../i386/pci/common.o
+fixup-y += ../../i386/pci/fixup.o
+i386-y += ../../i386/pci/i386.o
diff --git a/arch/x86_64/pci/k8-bus.c b/arch/x86_64/pci/k8-bus.c
new file mode 100644
index 000000000000..62349c78db57
--- /dev/null
+++ b/arch/x86_64/pci/k8-bus.c
@@ -0,0 +1,78 @@
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <asm/mpspec.h>
+#include <linux/cpumask.h>
+
+/*
+ * 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, printed;
+ 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.
+ */
+ 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++)
+ pci_bus_to_cpumask[j] =
+ node_to_cpumask(NODE_ID(nid));
+ }
+ }
+ }
+
+ /* quick sanity check */
+ printed = 0;
+ for (i = 0; i < 256; i++) {
+ if (cpus_empty(pci_bus_to_cpumask[i])) {
+ pci_bus_to_cpumask[i] = CPU_MASK_ALL;
+ if (printed)
+ continue;
+ printk(KERN_ERR
+ "k8-bus.c: some busses have empty cpu mask\n");
+ printed = 1;
+ }
+ }
+
+ return 0;
+}
+
+fs_initcall(fill_mp_bus_to_cpumask);
diff --git a/arch/x86_64/pci/mmconfig.c b/arch/x86_64/pci/mmconfig.c
new file mode 100644
index 000000000000..b693c232fd07
--- /dev/null
+++ b/arch/x86_64/pci/mmconfig.c
@@ -0,0 +1,104 @@
+/*
+ * 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 <linux/pci.h>
+#include <linux/init.h>
+#include "pci.h"
+
+#define MMCONFIG_APER_SIZE (256*1024*1024)
+
+/* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
+u32 pci_mmcfg_base_addr;
+
+/* Static virtual mapping of the MMCONFIG aperture */
+char *pci_mmcfg_virt;
+
+static inline char *pci_dev_base(unsigned int bus, unsigned int devfn)
+{
+ return pci_mmcfg_virt + ((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 *addr = pci_dev_base(bus, devfn);
+
+ if (unlikely(!value || (bus > 255) || (devfn > 255) || (reg > 4095)))
+ return -EINVAL;
+
+ switch (len) {
+ case 1:
+ *value = readb(addr + reg);
+ break;
+ case 2:
+ *value = readw(addr + reg);
+ break;
+ case 4:
+ *value = 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 *addr = pci_dev_base(bus,devfn);
+
+ if (unlikely((bus > 255) || (devfn > 255) || (reg > 4095)))
+ return -EINVAL;
+
+ switch (len) {
+ case 1:
+ writeb(value, addr + reg);
+ break;
+ case 2:
+ writew(value, addr + reg);
+ break;
+ case 4:
+ writel(value, addr + reg);
+ break;
+ }
+
+ return 0;
+}
+
+static struct pci_raw_ops pci_mmcfg = {
+ .read = pci_mmcfg_read,
+ .write = pci_mmcfg_write,
+};
+
+static int __init pci_mmcfg_init(void)
+{
+ if ((pci_probe & PCI_PROBE_MMCONF) == 0)
+ return 0;
+ if (!pci_mmcfg_base_addr)
+ return 0;
+
+ /* Kludge for now. Don't use mmconfig on AMD systems because
+ those have some busses where mmconfig doesn't work,
+ and we don't parse ACPI MCFG well enough to handle that.
+ Remove when proper handling is added. */
+ if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD)
+ return 0;
+
+ /* RED-PEN i386 doesn't do _nocache right now */
+ pci_mmcfg_virt = ioremap_nocache(pci_mmcfg_base_addr, MMCONFIG_APER_SIZE);
+ if (!pci_mmcfg_virt) {
+ printk("PCI: Cannot map mmconfig aperture\n");
+ return 0;
+ }
+
+ printk(KERN_INFO "PCI: Using MMCONFIG at %x\n", pci_mmcfg_base_addr);
+ raw_pci_ops = &pci_mmcfg;
+ pci_probe = (pci_probe & ~PCI_PROBE_MASK) | PCI_PROBE_MMCONF;
+
+ return 0;
+}
+
+arch_initcall(pci_mmcfg_init);