# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1252309305 -3600
# Node ID 2c2cdaffc3f94ab9b910be9e7c09c6e1d629a3ea
# Parent 9dc39a86a3966483dfafcded2d9fdb979dab22bd
x86-64/mmcfg: add explicit support for nVidia MCP55
This is a simple port from Linux 2.6.31-rc8.
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>
---
xen/arch/x86/x86_64/mmconfig-shared.c | 89 ++++++++++++++++++++++++++++++++++
xen/arch/x86/x86_64/mmconfig.h | 2
2 files changed, 91 insertions(+)
diff -r 9dc39a86a396 -r 2c2cdaffc3f9 xen/arch/x86/x86_64/mmconfig-shared.c
--- a/xen/arch/x86/x86_64/mmconfig-shared.c Mon Sep 07 08:41:00 2009 +0100
+++ b/xen/arch/x86/x86_64/mmconfig-shared.c Mon Sep 07 08:41:45 2009 +0100
@@ -158,6 +158,93 @@ static const char __init *pci_mmcfg_amd_
return "AMD Family 10h NB";
}
+static const char __init *pci_mmcfg_nvidia_mcp55(void)
+{
+ static bool_t __initdata mcp55_checked;
+ int bus, i;
+
+ static const u32 extcfg_regnum = 0x90;
+ static const u32 extcfg_enable_mask = 1<<31;
+ static const u32 extcfg_start_mask = 0xff<<16;
+ static const int extcfg_start_shift = 16;
+ static const u32 extcfg_size_mask = 0x3<<28;
+ static const int extcfg_size_shift = 28;
+ static const int extcfg_sizebus[] = {0xff, 0x7f, 0x3f, 0x1f};
+ static const u32 extcfg_base_mask[] = {0x7ff8, 0x7ffc, 0x7ffe, 0x7fff};
+ static const int extcfg_base_lshift = 25;
+
+ /* check if amd fam10h already took over */
+ if (!acpi_disabled || pci_mmcfg_config_num || mcp55_checked)
+ return NULL;
+
+ mcp55_checked = 1;
+ for (i = bus = 0; bus < 256; bus++) {
+ u32 l, extcfg;
+ u16 vendor, device;
+
+ l = pci_conf_read32(bus, 0, 0, 0);
+ vendor = l & 0xffff;
+ device = (l >> 16) & 0xffff;
+
+ if (PCI_VENDOR_ID_NVIDIA != vendor || 0x0369 != device)
+ continue;
+
+ extcfg = pci_conf_read32(bus, 0, 0, extcfg_regnum);
+
+ if (extcfg & extcfg_enable_mask)
+ i++;
+ }
+
+ if (!i)
+ return NULL;
+
+ pci_mmcfg_config_num = i;
+ pci_mmcfg_config = xmalloc_array(struct acpi_mcfg_allocation,
+ pci_mmcfg_config_num);
+
+ for (i = bus = 0; bus < 256; bus++) {
+ u64 base;
+ u32 l, extcfg;
+ u16 vendor, device;
+ int size_index;
+
+ l = pci_conf_read32(bus, 0, 0, 0);
+ vendor = l & 0xffff;
+ device = (l >> 16) & 0xffff;
+
+ if (PCI_VENDOR_ID_NVIDIA != vendor || 0x0369 != device)
+ continue;
+
+ extcfg = pci_conf_read32(bus, 0, 0, extcfg_regnum);
+
+ if (!(extcfg & extcfg_enable_mask))
+ continue;
+
+ if (i >= pci_mmcfg_config_num)
+ break;
+
+ size_index = (extcfg & extcfg_size_mask) >> extcfg_size_shift;
+ base = extcfg & extcfg_base_mask[size_index];
+ /* base could be > 4G */
+ pci_mmcfg_config[i].address = base << extcfg_base_lshift;
+ pci_mmcfg_config[i].pci_segment = 0;
+ pci_mmcfg_config[i].start_bus_number =
+ (extcfg & extcfg_start_mask) >> extcfg_start_shift;
+ pci_mmcfg_config[i].end_bus_number =
+ pci_mmcfg_config[i].start_bus_number + extcfg_sizebus[size_index];
+ i++;
+ }
+
+ if (bus == 256)
+ return "nVidia MCP55";
+
+ pci_mmcfg_config_num = 0;
+ xfree(pci_mmcfg_config);
+ pci_mmcfg_config = NULL;
+
+ return NULL;
+}
+
struct pci_mmcfg_hostbridge_probe {
u32 bus;
u32 devfn;
@@ -175,6 +262,8 @@ static struct pci_mmcfg_hostbridge_probe
0x1200, pci_mmcfg_amd_fam10h },
{ 0xff, PCI_DEVFN(0, 0), PCI_VENDOR_ID_AMD,
0x1200, pci_mmcfg_amd_fam10h },
+ { 0, PCI_DEVFN(0, 0), PCI_VENDOR_ID_NVIDIA,
+ 0x0369, pci_mmcfg_nvidia_mcp55 },
};
static int __init pci_mmcfg_check_hostbridge(void)
diff -r 9dc39a86a396 -r 2c2cdaffc3f9 xen/arch/x86/x86_64/mmconfig.h
--- a/xen/arch/x86/x86_64/mmconfig.h Mon Sep 07 08:41:00 2009 +0100
+++ b/xen/arch/x86/x86_64/mmconfig.h Mon Sep 07 08:41:45 2009 +0100
@@ -31,6 +31,8 @@
#define PCI_VENDOR_ID_AMD 0x1022
#define PCI_CHECK_ENABLE_AMD_MMCONF 0x20000
+
+#define PCI_VENDOR_ID_NVIDIA 0x10de
/*
* AMD Fam10h CPUs are buggy, and cannot access MMIO config space
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