Linux-2.6.12-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!

1 files changed, 761 insertions, 0 deletions

diff --git a/drivers/char/agp/amd64-agp.c b/drivers/char/agp/amd64-agp.c
new file mode 100644
index 000000000000..905f0629c44f
--- /dev/null
+++ b/drivers/char/agp/amd64-agp.c
@@ -0,0 +1,761 @@
+/*
+ * Copyright 2001-2003 SuSE Labs.
+ * Distributed under the GNU public license, v2.
+ *
+ * This is a GART driver for the AMD Opteron/Athlon64 on-CPU northbridge.
+ * It also includes support for the AMD 8151 AGP bridge,
+ * although it doesn't actually do much, as all the real
+ * work is done in the northbridge(s).
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/agp_backend.h>
+#include "agp.h"
+
+/* Will need to be increased if AMD64 ever goes >8-way. */
+#define MAX_HAMMER_GARTS   8
+
+/* PTE bits. */
+#define GPTE_VALID	1
+#define GPTE_COHERENT	2
+
+/* Aperture control register bits. */
+#define GARTEN		(1<<0)
+#define DISGARTCPU	(1<<4)
+#define DISGARTIO	(1<<5)
+
+/* GART cache control register bits. */
+#define INVGART		(1<<0)
+#define GARTPTEERR	(1<<1)
+
+/* K8 On-cpu GART registers */
+#define AMD64_GARTAPERTURECTL	0x90
+#define AMD64_GARTAPERTUREBASE	0x94
+#define AMD64_GARTTABLEBASE	0x98
+#define AMD64_GARTCACHECTL	0x9c
+#define AMD64_GARTEN		(1<<0)
+
+/* NVIDIA K8 registers */
+#define NVIDIA_X86_64_0_APBASE		0x10
+#define NVIDIA_X86_64_1_APBASE1		0x50
+#define NVIDIA_X86_64_1_APLIMIT1	0x54
+#define NVIDIA_X86_64_1_APSIZE		0xa8
+#define NVIDIA_X86_64_1_APBASE2		0xd8
+#define NVIDIA_X86_64_1_APLIMIT2	0xdc
+
+/* ULi K8 registers */
+#define ULI_X86_64_BASE_ADDR		0x10
+#define ULI_X86_64_HTT_FEA_REG		0x50
+#define ULI_X86_64_ENU_SCR_REG		0x54
+
+static int nr_garts;
+static struct pci_dev * hammers[MAX_HAMMER_GARTS];
+
+static struct resource *aperture_resource;
+static int __initdata agp_try_unsupported;
+
+static int gart_iterator;
+#define for_each_nb() for(gart_iterator=0;gart_iterator<nr_garts;gart_iterator++)
+
+static void flush_amd64_tlb(struct pci_dev *dev)
+{
+	u32 tmp;
+
+	pci_read_config_dword (dev, AMD64_GARTCACHECTL, &tmp);
+	tmp |= INVGART;
+	pci_write_config_dword (dev, AMD64_GARTCACHECTL, tmp);
+}
+
+static void amd64_tlbflush(struct agp_memory *temp)
+{
+	for_each_nb()
+		flush_amd64_tlb(hammers[gart_iterator]);
+}
+
+static int amd64_insert_memory(struct agp_memory *mem, off_t pg_start, int type)
+{
+	int i, j, num_entries;
+	long long tmp;
+	u32 pte;
+
+	num_entries = agp_num_entries();
+
+	if (type != 0 || mem->type != 0)
+		return -EINVAL;
+
+	/* Make sure we can fit the range in the gatt table. */
+	/* FIXME: could wrap */
+	if (((unsigned long)pg_start + mem->page_count) > num_entries)
+		return -EINVAL;
+
+	j = pg_start;
+
+	/* gatt table should be empty. */
+	while (j < (pg_start + mem->page_count)) {
+		if (!PGE_EMPTY(agp_bridge, readl(agp_bridge->gatt_table+j)))
+			return -EBUSY;
+		j++;
+	}
+
+	if (mem->is_flushed == FALSE) {
+		global_cache_flush();
+		mem->is_flushed = TRUE;
+	}
+
+	for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
+		tmp = agp_bridge->driver->mask_memory(agp_bridge,
+			mem->memory[i], mem->type);
+
+		BUG_ON(tmp & 0xffffff0000000ffcULL);
+		pte = (tmp & 0x000000ff00000000ULL) >> 28;
+		pte |=(tmp & 0x00000000fffff000ULL);
+		pte |= GPTE_VALID | GPTE_COHERENT;
+
+		writel(pte, agp_bridge->gatt_table+j);
+		readl(agp_bridge->gatt_table+j);	/* PCI Posting. */
+	}
+	amd64_tlbflush(mem);
+	return 0;
+}
+
+/*
+ * This hack alters the order element according
+ * to the size of a long. It sucks. I totally disown this, even
+ * though it does appear to work for the most part.
+ */
+static struct aper_size_info_32 amd64_aperture_sizes[7] =
+{
+	{32,   8192,   3+(sizeof(long)/8), 0 },
+	{64,   16384,  4+(sizeof(long)/8), 1<<1 },
+	{128,  32768,  5+(sizeof(long)/8), 1<<2 },
+	{256,  65536,  6+(sizeof(long)/8), 1<<1 | 1<<2 },
+	{512,  131072, 7+(sizeof(long)/8), 1<<3 },
+	{1024, 262144, 8+(sizeof(long)/8), 1<<1 | 1<<3},
+	{2048, 524288, 9+(sizeof(long)/8), 1<<2 | 1<<3}
+};
+
+
+/*
+ * Get the current Aperture size from the x86-64.
+ * Note, that there may be multiple x86-64's, but we just return
+ * the value from the first one we find. The set_size functions
+ * keep the rest coherent anyway. Or at least should do.
+ */
+static int amd64_fetch_size(void)
+{
+	struct pci_dev *dev;
+	int i;
+	u32 temp;
+	struct aper_size_info_32 *values;
+
+	dev = hammers[0];
+	if (dev==NULL)
+		return 0;
+
+	pci_read_config_dword(dev, AMD64_GARTAPERTURECTL, &temp);
+	temp = (temp & 0xe);
+	values = A_SIZE_32(amd64_aperture_sizes);
+
+	for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
+		if (temp == values[i].size_value) {
+			agp_bridge->previous_size =
+			    agp_bridge->current_size = (void *) (values + i);
+
+			agp_bridge->aperture_size_idx = i;
+			return values[i].size;
+		}
+	}
+	return 0;
+}
+
+/*
+ * In a multiprocessor x86-64 system, this function gets
+ * called once for each CPU.
+ */
+static u64 amd64_configure (struct pci_dev *hammer, u64 gatt_table)
+{
+	u64 aperturebase;
+	u32 tmp;
+	u64 addr, aper_base;
+
+	/* Address to map to */
+	pci_read_config_dword (hammer, AMD64_GARTAPERTUREBASE, &tmp);
+	aperturebase = tmp << 25;
+	aper_base = (aperturebase & PCI_BASE_ADDRESS_MEM_MASK);
+
+	/* address of the mappings table */
+	addr = (u64) gatt_table;
+	addr >>= 12;
+	tmp = (u32) addr<<4;
+	tmp &= ~0xf;
+	pci_write_config_dword (hammer, AMD64_GARTTABLEBASE, tmp);
+
+	/* Enable GART translation for this hammer. */
+	pci_read_config_dword(hammer, AMD64_GARTAPERTURECTL, &tmp);
+	tmp |= GARTEN;
+	tmp &= ~(DISGARTCPU | DISGARTIO);
+	pci_write_config_dword(hammer, AMD64_GARTAPERTURECTL, tmp);
+
+	/* keep CPU's coherent. */
+	flush_amd64_tlb (hammer);
+
+	return aper_base;
+}
+
+
+static struct aper_size_info_32 amd_8151_sizes[7] =
+{
+	{2048, 524288, 9, 0x00000000 },	/* 0 0 0 0 0 0 */
+	{1024, 262144, 8, 0x00000400 },	/* 1 0 0 0 0 0 */
+	{512,  131072, 7, 0x00000600 },	/* 1 1 0 0 0 0 */
+	{256,  65536,  6, 0x00000700 },	/* 1 1 1 0 0 0 */
+	{128,  32768,  5, 0x00000720 },	/* 1 1 1 1 0 0 */
+	{64,   16384,  4, 0x00000730 },	/* 1 1 1 1 1 0 */
+	{32,   8192,   3, 0x00000738 } 	/* 1 1 1 1 1 1 */
+};
+
+static int amd_8151_configure(void)
+{
+	unsigned long gatt_bus = virt_to_phys(agp_bridge->gatt_table_real);
+
+	/* Configure AGP regs in each x86-64 host bridge. */
+	for_each_nb() {
+		agp_bridge->gart_bus_addr =
+				amd64_configure(hammers[gart_iterator],gatt_bus);
+	}
+	return 0;
+}
+
+
+static void amd64_cleanup(void)
+{
+	u32 tmp;
+
+	for_each_nb() {
+		/* disable gart translation */
+		pci_read_config_dword (hammers[gart_iterator], AMD64_GARTAPERTURECTL, &tmp);
+		tmp &= ~AMD64_GARTEN;
+		pci_write_config_dword (hammers[gart_iterator], AMD64_GARTAPERTURECTL, tmp);
+	}
+}
+
+
+struct agp_bridge_driver amd_8151_driver = {
+	.owner			= THIS_MODULE,
+	.aperture_sizes		= amd_8151_sizes,
+	.size_type		= U32_APER_SIZE,
+	.num_aperture_sizes	= 7,
+	.configure		= amd_8151_configure,
+	.fetch_size		= amd64_fetch_size,
+	.cleanup		= amd64_cleanup,
+	.tlb_flush		= amd64_tlbflush,
+	.mask_memory		= agp_generic_mask_memory,
+	.masks			= NULL,
+	.agp_enable		= agp_generic_enable,
+	.cache_flush		= global_cache_flush,
+	.create_gatt_table	= agp_generic_create_gatt_table,
+	.free_gatt_table	= agp_generic_free_gatt_table,
+	.insert_memory		= amd64_insert_memory,
+	.remove_memory		= agp_generic_remove_memory,
+	.alloc_by_type		= agp_generic_alloc_by_type,
+	.free_by_type		= agp_generic_free_by_type,
+	.agp_alloc_page		= agp_generic_alloc_page,
+	.agp_destroy_page	= agp_generic_destroy_page,
+};
+
+/* Some basic sanity checks for the aperture. */
+static int __devinit aperture_valid(u64 aper, u32 size)
+{
+	u32 pfn, c;
+	if (aper == 0) {
+		printk(KERN_ERR PFX "No aperture\n");
+		return 0;
+	}
+	if (size < 32*1024*1024) {
+		printk(KERN_ERR PFX "Aperture too small (%d MB)\n", size>>20);
+		return 0;
+	}
+	if (aper + size > 0xffffffff) {
+		printk(KERN_ERR PFX "Aperture out of bounds\n");
+		return 0;
+	}
+	pfn = aper >> PAGE_SHIFT;
+	for (c = 0; c < size/PAGE_SIZE; c++) {
+		if (!pfn_valid(pfn + c))
+			break;
+		if (!PageReserved(pfn_to_page(pfn + c))) {
+			printk(KERN_ERR PFX "Aperture pointing to RAM\n");
+			return 0;
+		}
+	}
+
+	/* Request the Aperture. This catches cases when someone else
+	   already put a mapping in there - happens with some very broken BIOS
+
+	   Maybe better to use pci_assign_resource/pci_enable_device instead
+	   trusting the bridges? */
+	if (!aperture_resource &&
+	    !(aperture_resource = request_mem_region(aper, size, "aperture"))) {
+		printk(KERN_ERR PFX "Aperture conflicts with PCI mapping.\n");
+		return 0;
+	}
+	return 1;
+}
+
+/*
+ * W*s centric BIOS sometimes only set up the aperture in the AGP
+ * bridge, not the northbridge. On AMD64 this is handled early
+ * in aperture.c, but when GART_IOMMU is not enabled or we run
+ * on a 32bit kernel this needs to be redone.
+ * Unfortunately it is impossible to fix the aperture here because it's too late
+ * to allocate that much memory. But at least error out cleanly instead of
+ * crashing.
+ */
+static __devinit int fix_northbridge(struct pci_dev *nb, struct pci_dev *agp,
+								 u16 cap)
+{
+	u32 aper_low, aper_hi;
+	u64 aper, nb_aper;
+	int order = 0;
+	u32 nb_order, nb_base;
+	u16 apsize;
+
+	pci_read_config_dword(nb, 0x90, &nb_order);
+	nb_order = (nb_order >> 1) & 7;
+	pci_read_config_dword(nb, 0x94, &nb_base);
+	nb_aper = nb_base << 25;
+	if (aperture_valid(nb_aper, (32*1024*1024)<<nb_order)) {
+		return 0;
+	}
+
+	/* Northbridge seems to contain crap. Try the AGP bridge. */
+
+	pci_read_config_word(agp, cap+0x14, &apsize);
+	if (apsize == 0xffff)
+		return -1;
+
+	apsize &= 0xfff;
+	/* Some BIOS use weird encodings not in the AGPv3 table. */
+	if (apsize & 0xff)
+		apsize |= 0xf00;
+	order = 7 - hweight16(apsize);
+
+	pci_read_config_dword(agp, 0x10, &aper_low);
+	pci_read_config_dword(agp, 0x14, &aper_hi);
+	aper = (aper_low & ~((1<<22)-1)) | ((u64)aper_hi << 32);
+	printk(KERN_INFO PFX "Aperture from AGP @ %Lx size %u MB\n", aper, 32 << order);
+	if (order < 0 || !aperture_valid(aper, (32*1024*1024)<<order))
+		return -1;
+
+	pci_write_config_dword(nb, 0x90, order << 1);
+	pci_write_config_dword(nb, 0x94, aper >> 25);
+
+	return 0;
+}
+
+static __devinit int cache_nbs (struct pci_dev *pdev, u32 cap_ptr)
+{
+	struct pci_dev *loop_dev = NULL;
+	int i = 0;
+
+	/* cache pci_devs of northbridges. */
+	while ((loop_dev = pci_get_device(PCI_VENDOR_ID_AMD, 0x1103, loop_dev))
+			!= NULL) {
+		if (i == MAX_HAMMER_GARTS) {
+			printk(KERN_ERR PFX "Too many northbridges for AGP\n");
+			return -1;
+		}
+		if (fix_northbridge(loop_dev, pdev, cap_ptr) < 0) {
+			printk(KERN_ERR PFX "No usable aperture found.\n");
+#ifdef __x86_64__
+			/* should port this to i386 */
+			printk(KERN_ERR PFX "Consider rebooting with iommu=memaper=2 to get a good aperture.\n");
+#endif
+			return -1;
+		}
+		hammers[i++] = loop_dev;
+	}
+		nr_garts = i;
+	return i == 0 ? -1 : 0;
+}
+
+/* Handle AMD 8151 quirks */
+static void __devinit amd8151_init(struct pci_dev *pdev, struct agp_bridge_data *bridge)
+{
+	char *revstring;
+	u8 rev_id;
+
+	pci_read_config_byte(pdev, PCI_REVISION_ID, &rev_id);
+	switch (rev_id) {
+	case 0x01: revstring="A0"; break;
+	case 0x02: revstring="A1"; break;
+	case 0x11: revstring="B0"; break;
+	case 0x12: revstring="B1"; break;
+	case 0x13: revstring="B2"; break;
+	case 0x14: revstring="B3"; break;
+	default:   revstring="??"; break;
+	}
+
+	printk (KERN_INFO PFX "Detected AMD 8151 AGP Bridge rev %s\n", revstring);
+
+	/*
+	 * Work around errata.
+	 * Chips before B2 stepping incorrectly reporting v3.5
+	 */
+	if (rev_id < 0x13) {
+		printk (KERN_INFO PFX "Correcting AGP revision (reports 3.5, is really 3.0)\n");
+		bridge->major_version = 3;
+		bridge->minor_version = 0;
+	}
+}
+
+
+static struct aper_size_info_32 uli_sizes[7] =
+{
+	{256, 65536, 6, 10},
+	{128, 32768, 5, 9},
+	{64, 16384, 4, 8},
+	{32, 8192, 3, 7},
+	{16, 4096, 2, 6},
+	{8, 2048, 1, 4},
+	{4, 1024, 0, 3}
+};
+static int __devinit uli_agp_init(struct pci_dev *pdev)
+{
+	u32 httfea,baseaddr,enuscr;
+	struct pci_dev *dev1;
+	int i;
+	unsigned size = amd64_fetch_size();
+	printk(KERN_INFO "Setting up ULi AGP. \n");
+	dev1 = pci_find_slot ((unsigned int)pdev->bus->number,PCI_DEVFN(0,0));
+	if (dev1 == NULL) {
+		printk(KERN_INFO PFX "Detected a ULi chipset, "
+			"but could not fine the secondary device.\n");
+		return -ENODEV;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(uli_sizes); i++)
+		if (uli_sizes[i].size == size)
+			break;
+
+	if (i == ARRAY_SIZE(uli_sizes)) {
+		printk(KERN_INFO PFX "No ULi size found for %d\n", size);
+		return -ENODEV;
+	}
+
+	/* shadow x86-64 registers into ULi registers */
+	pci_read_config_dword (hammers[0], AMD64_GARTAPERTUREBASE, &httfea);
+
+	/* if x86-64 aperture base is beyond 4G, exit here */
+	if ((httfea & 0x7fff) >> (32 - 25))
+		return -ENODEV;
+
+	httfea = (httfea& 0x7fff) << 25;
+
+	pci_read_config_dword(pdev, ULI_X86_64_BASE_ADDR, &baseaddr);
+	baseaddr&= ~PCI_BASE_ADDRESS_MEM_MASK;
+	baseaddr|= httfea;
+	pci_write_config_dword(pdev, ULI_X86_64_BASE_ADDR, baseaddr);
+
+	enuscr= httfea+ (size * 1024 * 1024) - 1;
+	pci_write_config_dword(dev1, ULI_X86_64_HTT_FEA_REG, httfea);
+	pci_write_config_dword(dev1, ULI_X86_64_ENU_SCR_REG, enuscr);
+	return 0;
+}
+
+
+static struct aper_size_info_32 nforce3_sizes[5] =
+{
+	{512,  131072, 7, 0x00000000 },
+	{256,  65536,  6, 0x00000008 },
+	{128,  32768,  5, 0x0000000C },
+	{64,   16384,  4, 0x0000000E },
+	{32,   8192,   3, 0x0000000F }
+};
+
+/* Handle shadow device of the Nvidia NForce3 */
+/* CHECK-ME original 2.4 version set up some IORRs. Check if that is needed. */
+static int __devinit nforce3_agp_init(struct pci_dev *pdev)
+{
+	u32 tmp, apbase, apbar, aplimit;
+	struct pci_dev *dev1;
+	int i;
+	unsigned size = amd64_fetch_size();
+
+	printk(KERN_INFO PFX "Setting up Nforce3 AGP.\n");
+
+	dev1 = pci_find_slot((unsigned int)pdev->bus->number, PCI_DEVFN(11, 0));
+	if (dev1 == NULL) {
+		printk(KERN_INFO PFX "agpgart: Detected an NVIDIA "
+			"nForce3 chipset, but could not find "
+			"the secondary device.\n");
+		return -ENODEV;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(nforce3_sizes); i++)
+		if (nforce3_sizes[i].size == size)
+			break;
+
+	if (i == ARRAY_SIZE(nforce3_sizes)) {
+		printk(KERN_INFO PFX "No NForce3 size found for %d\n", size);
+		return -ENODEV;
+	}
+
+	pci_read_config_dword(dev1, NVIDIA_X86_64_1_APSIZE, &tmp);
+	tmp &= ~(0xf);
+	tmp |= nforce3_sizes[i].size_value;
+	pci_write_config_dword(dev1, NVIDIA_X86_64_1_APSIZE, tmp);
+
+	/* shadow x86-64 registers into NVIDIA registers */
+	pci_read_config_dword (hammers[0], AMD64_GARTAPERTUREBASE, &apbase);
+
+	/* if x86-64 aperture base is beyond 4G, exit here */
+	if ( (apbase & 0x7fff) >> (32 - 25) )
+		 return -ENODEV;
+
+	apbase = (apbase & 0x7fff) << 25;
+
+	pci_read_config_dword(pdev, NVIDIA_X86_64_0_APBASE, &apbar);
+	apbar &= ~PCI_BASE_ADDRESS_MEM_MASK;
+	apbar |= apbase;
+	pci_write_config_dword(pdev, NVIDIA_X86_64_0_APBASE, apbar);
+
+	aplimit = apbase + (size * 1024 * 1024) - 1;
+	pci_write_config_dword(dev1, NVIDIA_X86_64_1_APBASE1, apbase);
+	pci_write_config_dword(dev1, NVIDIA_X86_64_1_APLIMIT1, aplimit);
+	pci_write_config_dword(dev1, NVIDIA_X86_64_1_APBASE2, apbase);
+	pci_write_config_dword(dev1, NVIDIA_X86_64_1_APLIMIT2, aplimit);
+
+	return 0;
+}
+
+static int __devinit agp_amd64_probe(struct pci_dev *pdev,
+				     const struct pci_device_id *ent)
+{
+	struct agp_bridge_data *bridge;
+	u8 cap_ptr;
+
+	cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
+	if (!cap_ptr)
+		return -ENODEV;
+
+	/* Could check for AGPv3 here */
+
+	bridge = agp_alloc_bridge();
+	if (!bridge)
+		return -ENOMEM;
+
+	if (pdev->vendor == PCI_VENDOR_ID_AMD &&
+	    pdev->device == PCI_DEVICE_ID_AMD_8151_0) {
+		amd8151_init(pdev, bridge);
+	} else {
+		printk(KERN_INFO PFX "Detected AGP bridge %x\n", pdev->devfn);
+	}
+
+	bridge->driver = &amd_8151_driver;
+	bridge->dev = pdev;
+	bridge->capndx = cap_ptr;
+
+	/* Fill in the mode register */
+	pci_read_config_dword(pdev, bridge->capndx+PCI_AGP_STATUS, &bridge->mode);
+
+	if (cache_nbs(pdev, cap_ptr) == -1) {
+		agp_put_bridge(bridge);
+		return -ENODEV;
+	}
+
+	if (pdev->vendor == PCI_VENDOR_ID_NVIDIA) {
+		int ret = nforce3_agp_init(pdev);
+		if (ret) {
+			agp_put_bridge(bridge);
+			return ret;
+		}
+	}
+
+	if (pdev->vendor == PCI_VENDOR_ID_AL) {
+		int ret = uli_agp_init(pdev);
+		if (ret) {
+			agp_put_bridge(bridge);
+			return ret;
+		}
+	}
+
+	pci_set_drvdata(pdev, bridge);
+	return agp_add_bridge(bridge);
+}
+
+static void __devexit agp_amd64_remove(struct pci_dev *pdev)
+{
+	struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
+
+	release_mem_region(virt_to_phys(bridge->gatt_table_real),
+			   amd64_aperture_sizes[bridge->aperture_size_idx].size);
+	agp_remove_bridge(bridge);
+	agp_put_bridge(bridge);
+}
+
+static struct pci_device_id agp_amd64_pci_table[] = {
+	{
+	.class		= (PCI_CLASS_BRIDGE_HOST << 8),
+	.class_mask	= ~0,
+	.vendor		= PCI_VENDOR_ID_AMD,
+	.device		= PCI_DEVICE_ID_AMD_8151_0,
+	.subvendor	= PCI_ANY_ID,
+	.subdevice	= PCI_ANY_ID,
+	},
+	/* ULi M1689 */
+	{
+	.class		= (PCI_CLASS_BRIDGE_HOST << 8),
+	.class_mask	= ~0,
+	.vendor		= PCI_VENDOR_ID_AL,
+	.device		= PCI_DEVICE_ID_AL_M1689,
+	.subvendor	= PCI_ANY_ID,
+	.subdevice	= PCI_ANY_ID,
+	},
+	/* VIA K8T800Pro */
+	{
+	.class		= (PCI_CLASS_BRIDGE_HOST << 8),
+	.class_mask	= ~0,
+	.vendor		= PCI_VENDOR_ID_VIA,
+	.device		= PCI_DEVICE_ID_VIA_K8T800PRO_0,
+	.subvendor	= PCI_ANY_ID,
+	.subdevice	= PCI_ANY_ID,
+	},
+	/* VIA K8T800 */
+	{
+	.class		= (PCI_CLASS_BRIDGE_HOST << 8),
+	.class_mask	= ~0,
+	.vendor		= PCI_VENDOR_ID_VIA,
+	.device		= PCI_DEVICE_ID_VIA_8385_0,
+	.subvendor	= PCI_ANY_ID,
+	.subdevice	= PCI_ANY_ID,
+	},
+	/* VIA K8M800 / K8N800 */
+	{
+	.class		= (PCI_CLASS_BRIDGE_HOST << 8),
+	.class_mask	= ~0,
+	.vendor		= PCI_VENDOR_ID_VIA,
+	.device		= PCI_DEVICE_ID_VIA_8380_0,
+	.subvendor	= PCI_ANY_ID,
+	.subdevice	= PCI_ANY_ID,
+	},
+	/* VIA K8T890 */
+	{
+	.class		= (PCI_CLASS_BRIDGE_HOST << 8),
+	.class_mask	= ~0,
+	.vendor		= PCI_VENDOR_ID_VIA,
+	.device		= PCI_DEVICE_ID_VIA_3238_0,
+	.subvendor	= PCI_ANY_ID,
+	.subdevice	= PCI_ANY_ID,
+	},
+	/* VIA K8T800/K8M800/K8N800 */
+	{
+	.class		= (PCI_CLASS_BRIDGE_HOST << 8),
+	.class_mask	= ~0,
+	.vendor		= PCI_VENDOR_ID_VIA,
+	.device		= PCI_DEVICE_ID_VIA_838X_1,
+	.subvendor	= PCI_ANY_ID,
+	.subdevice	= PCI_ANY_ID,
+	},
+	/* NForce3 */
+	{
+	.class		= (PCI_CLASS_BRIDGE_HOST << 8),
+	.class_mask	= ~0,
+	.vendor		= PCI_VENDOR_ID_NVIDIA,
+	.device		= PCI_DEVICE_ID_NVIDIA_NFORCE3,
+	.subvendor	= PCI_ANY_ID,
+	.subdevice	= PCI_ANY_ID,
+	},
+	{
+	.class		= (PCI_CLASS_BRIDGE_HOST << 8),
+	.class_mask	= ~0,
+	.vendor		= PCI_VENDOR_ID_NVIDIA,
+	.device		= PCI_DEVICE_ID_NVIDIA_NFORCE3S,
+	.subvendor	= PCI_ANY_ID,
+	.subdevice	= PCI_ANY_ID,
+	},
+	/* SIS 755 */
+	{
+	.class		= (PCI_CLASS_BRIDGE_HOST << 8),
+	.class_mask	= ~0,
+	.vendor		= PCI_VENDOR_ID_SI,
+	.device		= PCI_DEVICE_ID_SI_755,
+	.subvendor	= PCI_ANY_ID,
+	.subdevice	= PCI_ANY_ID,
+	},
+	{ }
+};
+
+MODULE_DEVICE_TABLE(pci, agp_amd64_pci_table);
+
+static struct pci_driver agp_amd64_pci_driver = {
+	.name		= "agpgart-amd64",
+	.id_table	= agp_amd64_pci_table,
+	.probe		= agp_amd64_probe,
+	.remove		= agp_amd64_remove,
+};
+
+
+/* Not static due to IOMMU code calling it early. */
+int __init agp_amd64_init(void)
+{
+	int err = 0;
+	static struct pci_device_id amd64nb[] = {
+		{ PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x1103) },
+		{ },
+	};
+
+	if (agp_off)
+		return -EINVAL;
+	if (pci_register_driver(&agp_amd64_pci_driver) > 0) {
+		struct pci_dev *dev;
+		if (!agp_try_unsupported && !agp_try_unsupported_boot) {
+			printk(KERN_INFO PFX "No supported AGP bridge found.\n");
+#ifdef MODULE
+			printk(KERN_INFO PFX "You can try agp_try_unsupported=1\n");
+#else
+			printk(KERN_INFO PFX "You can boot with agp=try_unsupported\n");
+#endif
+			return -ENODEV;
+		}
+
+		/* First check that we have at least one AMD64 NB */
+		if (!pci_dev_present(amd64nb))
+			return -ENODEV;
+
+		/* Look for any AGP bridge */
+		dev = NULL;
+		err = -ENODEV;
+		for_each_pci_dev(dev) {
+			if (!pci_find_capability(dev, PCI_CAP_ID_AGP))
+				continue;
+			/* Only one bridge supported right now */
+			if (agp_amd64_probe(dev, NULL) == 0) {
+				err = 0;
+				break;
+			}
+		}
+	}
+	return err;
+}
+
+static void __exit agp_amd64_cleanup(void)
+{
+	if (aperture_resource)
+		release_resource(aperture_resource);
+	pci_unregister_driver(&agp_amd64_pci_driver);
+}
+
+/* On AMD64 the PCI driver needs to initialize this driver early
+   for the IOMMU, so it has to be called via a backdoor. */
+#ifndef CONFIG_GART_IOMMU
+module_init(agp_amd64_init);
+module_exit(agp_amd64_cleanup);
+#endif
+
+MODULE_AUTHOR("Dave Jones <davej@codemonkey.org.uk>, Andi Kleen");
+module_param(agp_try_unsupported, bool, 0);
+MODULE_LICENSE("GPL");