4 files changed, 202 insertions, 6 deletions

diff --git a/arch/x86/pci/Makefile b/arch/x86/pci/Makefile
index 3af5a1e79c9c..ee0af58ca5bd 100644
--- a/arch/x86/pci/Makefile
+++ b/arch/x86/pci/Makefile
@@ -16,6 +16,7 @@ obj-$(CONFIG_STA2X11)           += sta2x11-fixup.o
 obj-$(CONFIG_X86_VISWS)         += visws.o
 
 obj-$(CONFIG_X86_NUMAQ)         += numaq_32.o
+obj-$(CONFIG_X86_NUMACHIP)      += numachip.o
 
 obj-$(CONFIG_X86_INTEL_MID)     += mrst.o
 
diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
index 192397c98606..0c01261fe5a8 100644
--- a/arch/x86/pci/acpi.c
+++ b/arch/x86/pci/acpi.c
@@ -12,6 +12,7 @@ struct pci_root_info {
         char name[16];
         unsigned int res_num;
         struct resource *res;
+        resource_size_t *res_offset;
         struct pci_sysdata sd;
 #ifdef  CONFIG_PCI_MMCONFIG
         bool mcfg_added;
@@ -22,6 +23,7 @@ struct pci_root_info {
 };
 
 static bool pci_use_crs = true;
+static bool pci_ignore_seg = false;
 
 static int __init set_use_crs(const struct dmi_system_id *id)
 {
@@ -35,7 +37,14 @@ static int __init set_nouse_crs(const struct dmi_system_id *id)
         return 0;
 }
 
-static const struct dmi_system_id pci_use_crs_table[] __initconst = {
+static int __init set_ignore_seg(const struct dmi_system_id *id)
+{
+        printk(KERN_INFO "PCI: %s detected: ignoring ACPI _SEG\n", id->ident);
+        pci_ignore_seg = true;
+        return 0;
+}
+
+static const struct dmi_system_id pci_crs_quirks[] __initconst = {
         /* http://bugzilla.kernel.org/show_bug.cgi?id=14183 */
         {
                 .callback = set_use_crs,
@@ -98,6 +107,16 @@ static const struct dmi_system_id pci_use_crs_table[] __initconst = {
                         DMI_MATCH(DMI_BIOS_VERSION, "6JET85WW (1.43 )"),
                 },
         },
+
+        /* https://bugzilla.kernel.org/show_bug.cgi?id=15362 */
+        {
+                .callback = set_ignore_seg,
+                .ident = "HP xw9300",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "HP xw9300 Workstation"),
+                },
+        },
         {}
 };
 
@@ -108,7 +127,7 @@ void __init pci_acpi_crs_quirks(void)
         if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year < 2008)
                 pci_use_crs = false;
 
-        dmi_check_system(pci_use_crs_table);
+        dmi_check_system(pci_crs_quirks);
 
         /*
          * If the user specifies "pci=use_crs" or "pci=nocrs" explicitly, that
@@ -305,6 +324,7 @@ setup_resource(struct acpi_resource *acpi_res, void *data)
         res->flags = flags;
         res->start = start;
         res->end = end;
+        info->res_offset[info->res_num] = addr.translation_offset;
 
         if (!pci_use_crs) {
                 dev_printk(KERN_DEBUG, &info->bridge->dev,
@@ -374,7 +394,8 @@ static void add_resources(struct pci_root_info *info,
                                  "ignoring host bridge window %pR (conflicts with %s %pR)\n",
                                  res, conflict->name, conflict);
                 else
-                        pci_add_resource(resources, res);
+                        pci_add_resource_offset(resources, res,
+                                        info->res_offset[i]);
         }
 }
 
@@ -382,6 +403,8 @@ static void free_pci_root_info_res(struct pci_root_info *info)
 {
         kfree(info->res);
         info->res = NULL;
+        kfree(info->res_offset);
+        info->res_offset = NULL;
         info->res_num = 0;
 }
 
@@ -432,10 +455,20 @@ probe_pci_root_info(struct pci_root_info *info, struct acpi_device *device,
                 return;
 
         size = sizeof(*info->res) * info->res_num;
-        info->res_num = 0;
         info->res = kzalloc(size, GFP_KERNEL);
-        if (!info->res)
+        if (!info->res) {
+                info->res_num = 0;
+                return;
+        }
+
+        size = sizeof(*info->res_offset) * info->res_num;
+        info->res_num = 0;
+        info->res_offset = kzalloc(size, GFP_KERNEL);
+        if (!info->res_offset) {
+                kfree(info->res);
+                info->res = NULL;
                 return;
+        }
 
         acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
                                 info);
@@ -455,6 +488,9 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root)
         int pxm;
 #endif
 
+        if (pci_ignore_seg)
+                domain = 0;
+
         if (domain && !pci_domains_supported) {
                 printk(KERN_WARNING "pci_bus %04x:%02x: "
                        "ignored (multiple domains not supported)\n",
diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c
index 720e973fc34a..1b1dda90a945 100644
--- a/arch/x86/pci/common.c
+++ b/arch/x86/pci/common.c
@@ -17,6 +17,7 @@
 #include <asm/io.h>
 #include <asm/smp.h>
 #include <asm/pci_x86.h>
+#include <asm/setup.h>
 
 unsigned int pci_probe = PCI_PROBE_BIOS | PCI_PROBE_CONF1 | PCI_PROBE_CONF2 |
                                 PCI_PROBE_MMCONF;
@@ -608,6 +609,35 @@ unsigned int pcibios_assign_all_busses(void)
         return (pci_probe & PCI_ASSIGN_ALL_BUSSES) ? 1 : 0;
 }
 
+int pcibios_add_device(struct pci_dev *dev)
+{
+        struct setup_data *data;
+        struct pci_setup_rom *rom;
+        u64 pa_data;
+
+        pa_data = boot_params.hdr.setup_data;
+        while (pa_data) {
+                data = phys_to_virt(pa_data);
+
+                if (data->type == SETUP_PCI) {
+                        rom = (struct pci_setup_rom *)data;
+
+                        if ((pci_domain_nr(dev->bus) == rom->segment) &&
+                            (dev->bus->number == rom->bus) &&
+                            (PCI_SLOT(dev->devfn) == rom->device) &&
+                            (PCI_FUNC(dev->devfn) == rom->function) &&
+                            (dev->vendor == rom->vendor) &&
+                            (dev->device == rom->devid)) {
+                                dev->rom = pa_data +
+                                      offsetof(struct pci_setup_rom, romdata);
+                                dev->romlen = rom->pcilen;
+                        }
+                }
+                pa_data = data->next;
+        }
+        return 0;
+}
+
 int pcibios_enable_device(struct pci_dev *dev, int mask)
 {
         int err;
@@ -626,7 +656,7 @@ void pcibios_disable_device (struct pci_dev *dev)
                 pcibios_disable_irq(dev);
 }
 
-int pci_ext_cfg_avail(struct pci_dev *dev)
+int pci_ext_cfg_avail(void)
 {
         if (raw_pci_ext_ops)
                 return 1;
diff --git a/arch/x86/pci/numachip.c b/arch/x86/pci/numachip.c
new file mode 100644
index 000000000000..7307d9d12d15
--- /dev/null
+++ b/arch/x86/pci/numachip.c
@@ -0,0 +1,129 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Numascale NumaConnect-specific PCI code
+ *
+ * Copyright (C) 2012 Numascale AS. All rights reserved.
+ *
+ * Send feedback to <support@numascale.com>
+ *
+ * PCI accessor functions derived from mmconfig_64.c
+ *
+ */
+
+#include <linux/pci.h>
+#include <asm/pci_x86.h>
+
+static u8 limit __read_mostly;
+
+static inline char __iomem *pci_dev_base(unsigned int seg, unsigned int bus, unsigned int devfn)
+{
+        struct pci_mmcfg_region *cfg = pci_mmconfig_lookup(seg, bus);
+
+        if (cfg && cfg->virt)
+                return cfg->virt + (PCI_MMCFG_BUS_OFFSET(bus) | (devfn << 12));
+        return NULL;
+}
+
+static int pci_mmcfg_read_numachip(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))) {
+err:            *value = -1;
+                return -EINVAL;
+        }
+
+        /* Ensure AMD Northbridges don't decode reads to other devices */
+        if (unlikely(bus == 0 && devfn >= limit)) {
+                *value = -1;
+                return 0;
+        }
+
+        rcu_read_lock();
+        addr = pci_dev_base(seg, bus, devfn);
+        if (!addr) {
+                rcu_read_unlock();
+                goto err;
+        }
+
+        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;
+        }
+        rcu_read_unlock();
+
+        return 0;
+}
+
+static int pci_mmcfg_write_numachip(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;
+
+        /* Ensure AMD Northbridges don't decode writes to other devices */
+        if (unlikely(bus == 0 && devfn >= limit))
+                return 0;
+
+        rcu_read_lock();
+        addr = pci_dev_base(seg, bus, devfn);
+        if (!addr) {
+                rcu_read_unlock();
+                return -EINVAL;
+        }
+
+        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;
+        }
+        rcu_read_unlock();
+
+        return 0;
+}
+
+const struct pci_raw_ops pci_mmcfg_numachip = {
+        .read = pci_mmcfg_read_numachip,
+        .write = pci_mmcfg_write_numachip,
+};
+
+int __init pci_numachip_init(void)
+{
+        int ret = 0;
+        u32 val;
+
+        /* For remote I/O, restrict bus 0 access to the actual number of AMD
+           Northbridges, which starts at device number 0x18 */
+        ret = raw_pci_read(0, 0, PCI_DEVFN(0x18, 0), 0x60, sizeof(val), &val);
+        if (ret)
+                goto out;
+
+        /* HyperTransport fabric size in bits 6:4 */
+        limit = PCI_DEVFN(0x18 + ((val >> 4) & 7) + 1, 0);
+
+        /* Use NumaChip PCI accessors for non-extended and extended access */
+        raw_pci_ops = raw_pci_ext_ops = &pci_mmcfg_numachip;
+out:
+        return ret;
+}