Merge branch 'pci/resource' into next

* pci/resource:
  PCI: Allocate 64-bit BARs above 4G when possible
  PCI: Enforce bus address limits in resource allocation
  PCI: Split out bridge window override of minimum allocation address
  agp/ati: Use PCI_COMMAND instead of hard-coded 4
  agp/intel: Use CPU physical address, not bus address, for ioremap()
  agp/intel: Use pci_bus_address() to get GTTADR bus address
  agp/intel: Use pci_bus_address() to get MMADR bus address
  agp/intel: Support 64-bit GMADR
  agp/intel: Rename gtt_bus_addr to gtt_phys_addr
  drm/i915: Rename gtt_bus_addr to gtt_phys_addr
  agp: Use pci_resource_start() to get CPU physical address for BAR
  agp: Support 64-bit APBASE
  PCI: Add pci_bus_address() to get bus address of a BAR
  PCI: Convert pcibios_resource_to_bus() to take a pci_bus, not a pci_dev
  PCI: Change pci_bus_region addresses to dma_addr_t

33 files changed, 244 insertions, 195 deletions

diff --git a/arch/alpha/kernel/pci-sysfs.c b/arch/alpha/kernel/pci-sysfs.c
index 2b183b0d3207..99e8d4796c96 100644
--- a/arch/alpha/kernel/pci-sysfs.c
+++ b/arch/alpha/kernel/pci-sysfs.c
@@ -83,7 +83,7 @@ static int pci_mmap_resource(struct kobject *kobj,
 	if (iomem_is_exclusive(res->start))
 		return -EINVAL;
 
-	pcibios_resource_to_bus(pdev, &bar, res);
+	pcibios_resource_to_bus(pdev->bus, &bar, res);
 	vma->vm_pgoff += bar.start >> (PAGE_SHIFT - (sparse ? 5 : 0));
 	mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io;
 
@@ -139,7 +139,7 @@ static int sparse_mem_mmap_fits(struct pci_dev *pdev, int num)
 	long dense_offset;
 	unsigned long sparse_size;
 
-	pcibios_resource_to_bus(pdev, &bar, &pdev->resource[num]);
+	pcibios_resource_to_bus(pdev->bus, &bar, &pdev->resource[num]);
 
 	/* All core logic chips have 4G sparse address space, except
 	   CIA which has 16G (see xxx_SPARSE_MEM and xxx_DENSE_MEM
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index a1e3e40ca3fd..d9476c1fc959 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -835,7 +835,7 @@ static void pcibios_fixup_resources(struct pci_dev *dev)
 		 * at 0 as unset as well, except if PCI_PROBE_ONLY is also set
 		 * since in that case, we don't want to re-assign anything
 		 */
-		pcibios_resource_to_bus(dev, &reg, res);
+		pcibios_resource_to_bus(dev->bus, &reg, res);
 		if (pci_has_flag(PCI_REASSIGN_ALL_RSRC) ||
 		    (reg.start == 0 && !pci_has_flag(PCI_PROBE_ONLY))) {
 			/* Only print message if not re-assigning */
@@ -886,7 +886,7 @@ static int pcibios_uninitialized_bridge_resource(struct pci_bus *bus,
 
 	/* Job is a bit different between memory and IO */
 	if (res->flags & IORESOURCE_MEM) {
-		pcibios_resource_to_bus(dev, &region, res);
+		pcibios_resource_to_bus(dev->bus, &region, res);
 
 		/* If the BAR is non-0 then it's probably been initialized */
 		if (region.start != 0)
diff --git a/arch/powerpc/kernel/pci_of_scan.c b/arch/powerpc/kernel/pci_of_scan.c
index ac0b034f9ae0..83c26d829991 100644
--- a/arch/powerpc/kernel/pci_of_scan.c
+++ b/arch/powerpc/kernel/pci_of_scan.c
@@ -111,7 +111,7 @@ static void of_pci_parse_addrs(struct device_node *node, struct pci_dev *dev)
 		res->name = pci_name(dev);
 		region.start = base;
 		region.end = base + size - 1;
-		pcibios_bus_to_resource(dev, res, &region);
+		pcibios_bus_to_resource(dev->bus, res, &region);
 	}
 }
 
@@ -280,7 +280,7 @@ void of_scan_pci_bridge(struct pci_dev *dev)
 		res->flags = flags;
 		region.start = of_read_number(&ranges[1], 2);
 		region.end = region.start + size - 1;
-		pcibios_bus_to_resource(dev, res, &region);
+		pcibios_bus_to_resource(dev->bus, res, &region);
 	}
 	sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus),
 		bus->number);
diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c
index cb021453de2a..7de8d1f590b7 100644
--- a/arch/sparc/kernel/pci.c
+++ b/arch/sparc/kernel/pci.c
@@ -392,7 +392,7 @@ static void apb_fake_ranges(struct pci_dev *dev,
 	res->flags = IORESOURCE_IO;
 	region.start = (first << 21);
 	region.end = (last << 21) + ((1 << 21) - 1);
-	pcibios_bus_to_resource(dev, res, &region);
+	pcibios_bus_to_resource(dev->bus, res, &region);
 
 	pci_read_config_byte(dev, APB_MEM_ADDRESS_MAP, &map);
 	apb_calc_first_last(map, &first, &last);
@@ -400,7 +400,7 @@ static void apb_fake_ranges(struct pci_dev *dev,
 	res->flags = IORESOURCE_MEM;
 	region.start = (first << 29);
 	region.end = (last << 29) + ((1 << 29) - 1);
-	pcibios_bus_to_resource(dev, res, &region);
+	pcibios_bus_to_resource(dev->bus, res, &region);
 }
 
 static void pci_of_scan_bus(struct pci_pbm_info *pbm,
@@ -491,7 +491,7 @@ static void of_scan_pci_bridge(struct pci_pbm_info *pbm,
 		res->flags = flags;
 		region.start = GET_64BIT(ranges, 1);
 		region.end = region.start + size - 1;
-		pcibios_bus_to_resource(dev, res, &region);
+		pcibios_bus_to_resource(dev->bus, res, &region);
 	}
 after_ranges:
 	sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus),
diff --git a/arch/x86/include/asm/pci.h b/arch/x86/include/asm/pci.h
index 0de52c5bf9a2..1ac6114c9ea5 100644
--- a/arch/x86/include/asm/pci.h
+++ b/arch/x86/include/asm/pci.h
@@ -125,7 +125,6 @@ int setup_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc,
 
 /* generic pci stuff */
 #include <asm-generic/pci.h>
-#define PCIBIOS_MAX_MEM_32 0xffffffff
 
 #ifdef CONFIG_NUMA
 /* Returns the node based on pci bus */
diff --git a/drivers/char/agp/agp.h b/drivers/char/agp/agp.h
index 923f99df4f1c..b709749c8639 100644
--- a/drivers/char/agp/agp.h
+++ b/drivers/char/agp/agp.h
@@ -239,6 +239,7 @@ long compat_agp_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
 
 /* Chipset independent registers (from AGP Spec) */
 #define AGP_APBASE	0x10
+#define AGP_APERTURE_BAR	0
 
 #define AGPSTAT		0x4
 #define AGPCMD		0x8
diff --git a/drivers/char/agp/ali-agp.c b/drivers/char/agp/ali-agp.c
index 443cd6751ca2..19db03667650 100644
--- a/drivers/char/agp/ali-agp.c
+++ b/drivers/char/agp/ali-agp.c
@@ -85,8 +85,8 @@ static int ali_configure(void)
 	pci_write_config_dword(agp_bridge->dev, ALI_TLBCTRL, ((temp & 0xffffff00) | 0x00000010));
 
 	/* address to map to */
-	pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
-	agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
+	agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
+						    AGP_APERTURE_BAR);
 
 #if 0
 	if (agp_bridge->type == ALI_M1541) {
diff --git a/drivers/char/agp/amd-k7-agp.c b/drivers/char/agp/amd-k7-agp.c
index 779f0ab845a9..3661a51e93e2 100644
--- a/drivers/char/agp/amd-k7-agp.c
+++ b/drivers/char/agp/amd-k7-agp.c
@@ -11,7 +11,7 @@
 #include <linux/slab.h>
 #include "agp.h"
 
-#define AMD_MMBASE	0x14
+#define AMD_MMBASE_BAR	1
 #define AMD_APSIZE	0xac
 #define AMD_MODECNTL	0xb0
 #define AMD_MODECNTL2	0xb2
@@ -126,7 +126,6 @@ static int amd_create_gatt_table(struct agp_bridge_data *bridge)
 	unsigned long __iomem *cur_gatt;
 	unsigned long addr;
 	int retval;
-	u32 temp;
 	int i;
 
 	value = A_SIZE_LVL2(agp_bridge->current_size);
@@ -149,8 +148,7 @@ static int amd_create_gatt_table(struct agp_bridge_data *bridge)
 	 * used to program the agp master not the cpu
 	 */
 
-	pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
-	addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
+	addr = pci_bus_address(agp_bridge->dev, AGP_APERTURE_BAR);
 	agp_bridge->gart_bus_addr = addr;
 
 	/* Calculate the agp offset */
@@ -207,6 +205,7 @@ static int amd_irongate_fetch_size(void)
 static int amd_irongate_configure(void)
 {
 	struct aper_size_info_lvl2 *current_size;
+	phys_addr_t reg;
 	u32 temp;
 	u16 enable_reg;
 
@@ -214,9 +213,8 @@ static int amd_irongate_configure(void)
 
 	if (!amd_irongate_private.registers) {
 		/* Get the memory mapped registers */
-		pci_read_config_dword(agp_bridge->dev, AMD_MMBASE, &temp);
-		temp = (temp & PCI_BASE_ADDRESS_MEM_MASK);
-		amd_irongate_private.registers = (volatile u8 __iomem *) ioremap(temp, 4096);
+		reg = pci_resource_start(agp_bridge->dev, AMD_MMBASE_BAR);
+		amd_irongate_private.registers = (volatile u8 __iomem *) ioremap(reg, 4096);
 		if (!amd_irongate_private.registers)
 			return -ENOMEM;
 	}
diff --git a/drivers/char/agp/amd64-agp.c b/drivers/char/agp/amd64-agp.c
index d79d692d05b8..95326ac610f6 100644
--- a/drivers/char/agp/amd64-agp.c
+++ b/drivers/char/agp/amd64-agp.c
@@ -269,7 +269,6 @@ static int agp_aperture_valid(u64 aper, u32 size)
  */
 static 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;
@@ -295,9 +294,7 @@ static int fix_northbridge(struct pci_dev *nb, struct pci_dev *agp, u16 cap)
 		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);
+	aper = pci_bus_address(agp, AGP_APERTURE_BAR);
 
 	/*
 	 * On some sick chips APSIZE is 0. This means it wants 4G
diff --git a/drivers/char/agp/ati-agp.c b/drivers/char/agp/ati-agp.c
index 03c1dc1ab552..18a7a6baa304 100644
--- a/drivers/char/agp/ati-agp.c
+++ b/drivers/char/agp/ati-agp.c
@@ -12,7 +12,7 @@
 #include <asm/agp.h>
 #include "agp.h"
 
-#define ATI_GART_MMBASE_ADDR	0x14
+#define ATI_GART_MMBASE_BAR	1
 #define ATI_RS100_APSIZE	0xac
 #define ATI_RS100_IG_AGPMODE	0xb0
 #define ATI_RS300_APSIZE	0xf8
@@ -196,12 +196,12 @@ static void ati_cleanup(void)
 
 static int ati_configure(void)
 {
+	phys_addr_t reg;
 	u32 temp;
 
 	/* Get the memory mapped registers */
-	pci_read_config_dword(agp_bridge->dev, ATI_GART_MMBASE_ADDR, &temp);
-	temp = (temp & 0xfffff000);
-	ati_generic_private.registers = (volatile u8 __iomem *) ioremap(temp, 4096);
+	reg = pci_resource_start(agp_bridge->dev, ATI_GART_MMBASE_BAR);
+	ati_generic_private.registers = (volatile u8 __iomem *) ioremap(reg, 4096);
 
 	if (!ati_generic_private.registers)
 		return -ENOMEM;
@@ -211,18 +211,18 @@ static int ati_configure(void)
 	else
 		pci_write_config_dword(agp_bridge->dev, ATI_RS300_IG_AGPMODE, 0x20000);
 
-	/* address to map too */
+	/* address to map to */
 	/*
-	pci_read_config_dword(agp_bridge.dev, AGP_APBASE, &temp);
-	agp_bridge.gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
+	agp_bridge.gart_bus_addr = pci_bus_address(agp_bridge.dev,
+						   AGP_APERTURE_BAR);
 	printk(KERN_INFO PFX "IGP320 gart_bus_addr: %x\n", agp_bridge.gart_bus_addr);
 	*/
 	writel(0x60000, ati_generic_private.registers+ATI_GART_FEATURE_ID);
 	readl(ati_generic_private.registers+ATI_GART_FEATURE_ID);	/* PCI Posting.*/
 
 	/* SIGNALED_SYSTEM_ERROR @ NB_STATUS */
-	pci_read_config_dword(agp_bridge->dev, 4, &temp);
-	pci_write_config_dword(agp_bridge->dev, 4, temp | (1<<14));
+	pci_read_config_dword(agp_bridge->dev, PCI_COMMAND, &temp);
+	pci_write_config_dword(agp_bridge->dev, PCI_COMMAND, temp | (1<<14));
 
 	/* Write out the address of the gatt table */
 	writel(agp_bridge->gatt_bus_addr, ati_generic_private.registers+ATI_GART_BASE);
@@ -385,8 +385,7 @@ static int ati_create_gatt_table(struct agp_bridge_data *bridge)
 	 * This is a bus address even on the alpha, b/c its
 	 * used to program the agp master not the cpu
 	 */
-	pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
-	addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
+	addr = pci_bus_address(agp_bridge->dev, AGP_APERTURE_BAR);
 	agp_bridge->gart_bus_addr = addr;
 
 	/* Calculate the agp offset */
diff --git a/drivers/char/agp/efficeon-agp.c b/drivers/char/agp/efficeon-agp.c
index 6974d5032053..533cb6d229b8 100644
--- a/drivers/char/agp/efficeon-agp.c
+++ b/drivers/char/agp/efficeon-agp.c
@@ -128,7 +128,6 @@ static void efficeon_cleanup(void)
 
 static int efficeon_configure(void)
 {
-	u32 temp;
 	u16 temp2;
 	struct aper_size_info_lvl2 *current_size;
 
@@ -141,8 +140,8 @@ static int efficeon_configure(void)
 			      current_size->size_value);
 
 	/* address to map to */
-	pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
-	agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
+	agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
+						    AGP_APERTURE_BAR);
 
 	/* agpctrl */
 	pci_write_config_dword(agp_bridge->dev, INTEL_AGPCTRL, 0x2280);
diff --git a/drivers/char/agp/generic.c b/drivers/char/agp/generic.c
index a0df182f6f7d..f39437addb58 100644
--- a/drivers/char/agp/generic.c
+++ b/drivers/char/agp/generic.c
@@ -1396,8 +1396,8 @@ int agp3_generic_configure(void)
 
 	current_size = A_SIZE_16(agp_bridge->current_size);
 
-	pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
-	agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
+	agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
+						    AGP_APERTURE_BAR);
 
 	/* set aperture size */
 	pci_write_config_word(agp_bridge->dev, agp_bridge->capndx+AGPAPSIZE, current_size->size_value);
diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c
index a426ee1f57a6..a7c276585a9f 100644
--- a/drivers/char/agp/intel-agp.c
+++ b/drivers/char/agp/intel-agp.c
@@ -118,7 +118,6 @@ static void intel_8xx_cleanup(void)
 
 static int intel_configure(void)
 {
-	u32 temp;
 	u16 temp2;
 	struct aper_size_info_16 *current_size;
 
@@ -128,8 +127,8 @@ static int intel_configure(void)
 	pci_write_config_word(agp_bridge->dev, INTEL_APSIZE, current_size->size_value);
 
 	/* address to map to */
-	pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
-	agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
+	agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
+						    AGP_APERTURE_BAR);
 
 	/* attbase - aperture base */
 	pci_write_config_dword(agp_bridge->dev, INTEL_ATTBASE, agp_bridge->gatt_bus_addr);
@@ -148,7 +147,7 @@ static int intel_configure(void)
 
 static int intel_815_configure(void)
 {
-	u32 temp, addr;
+	u32 addr;
 	u8 temp2;
 	struct aper_size_info_8 *current_size;
 
@@ -167,8 +166,8 @@ static int intel_815_configure(void)
 			current_size->size_value);
 
 	/* address to map to */
-	pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
-	agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
+	agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
+						    AGP_APERTURE_BAR);
 
 	pci_read_config_dword(agp_bridge->dev, INTEL_ATTBASE, &addr);
 	addr &= INTEL_815_ATTBASE_MASK;
@@ -208,7 +207,6 @@ static void intel_820_cleanup(void)
 
 static int intel_820_configure(void)
 {
-	u32 temp;
 	u8 temp2;
 	struct aper_size_info_8 *current_size;
 
@@ -218,8 +216,8 @@ static int intel_820_configure(void)
 	pci_write_config_byte(agp_bridge->dev, INTEL_APSIZE, current_size->size_value);
 
 	/* address to map to */
-	pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
-	agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
+	agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
+						    AGP_APERTURE_BAR);
 
 	/* attbase - aperture base */
 	pci_write_config_dword(agp_bridge->dev, INTEL_ATTBASE, agp_bridge->gatt_bus_addr);
@@ -239,7 +237,6 @@ static int intel_820_configure(void)
 
 static int intel_840_configure(void)
 {
-	u32 temp;
 	u16 temp2;
 	struct aper_size_info_8 *current_size;
 
@@ -249,8 +246,8 @@ static int intel_840_configure(void)
 	pci_write_config_byte(agp_bridge->dev, INTEL_APSIZE, current_size->size_value);
 
 	/* address to map to */
-	pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
-	agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
+	agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
+						    AGP_APERTURE_BAR);
 
 	/* attbase - aperture base */
 	pci_write_config_dword(agp_bridge->dev, INTEL_ATTBASE, agp_bridge->gatt_bus_addr);
@@ -268,7 +265,6 @@ static int intel_840_configure(void)
 
 static int intel_845_configure(void)
 {
-	u32 temp;
 	u8 temp2;
 	struct aper_size_info_8 *current_size;
 
@@ -282,9 +278,9 @@ static int intel_845_configure(void)
 				       agp_bridge->apbase_config);
 	} else {
 		/* address to map to */
-		pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
-		agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
-		agp_bridge->apbase_config = temp;
+		agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
+							    AGP_APERTURE_BAR);
+		agp_bridge->apbase_config = agp_bridge->gart_bus_addr;
 	}
 
 	/* attbase - aperture base */
@@ -303,7 +299,6 @@ static int intel_845_configure(void)
 
 static int intel_850_configure(void)
 {
-	u32 temp;
 	u16 temp2;
 	struct aper_size_info_8 *current_size;
 
@@ -313,8 +308,8 @@ static int intel_850_configure(void)
 	pci_write_config_byte(agp_bridge->dev, INTEL_APSIZE, current_size->size_value);
 
 	/* address to map to */
-	pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
-	agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
+	agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
+						    AGP_APERTURE_BAR);
 
 	/* attbase - aperture base */
 	pci_write_config_dword(agp_bridge->dev, INTEL_ATTBASE, agp_bridge->gatt_bus_addr);
@@ -332,7 +327,6 @@ static int intel_850_configure(void)
 
 static int intel_860_configure(void)
 {
-	u32 temp;
 	u16 temp2;
 	struct aper_size_info_8 *current_size;
 
@@ -342,8 +336,8 @@ static int intel_860_configure(void)
 	pci_write_config_byte(agp_bridge->dev, INTEL_APSIZE, current_size->size_value);
 
 	/* address to map to */
-	pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
-	agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
+	agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
+						    AGP_APERTURE_BAR);
 
 	/* attbase - aperture base */
 	pci_write_config_dword(agp_bridge->dev, INTEL_ATTBASE, agp_bridge->gatt_bus_addr);
@@ -361,7 +355,6 @@ static int intel_860_configure(void)
 
 static int intel_830mp_configure(void)
 {
-	u32 temp;
 	u16 temp2;
 	struct aper_size_info_8 *current_size;
 
@@ -371,8 +364,8 @@ static int intel_830mp_configure(void)
 	pci_write_config_byte(agp_bridge->dev, INTEL_APSIZE, current_size->size_value);
 
 	/* address to map to */
-	pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
-	agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
+	agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
+						    AGP_APERTURE_BAR);
 
 	/* attbase - aperture base */
 	pci_write_config_dword(agp_bridge->dev, INTEL_ATTBASE, agp_bridge->gatt_bus_addr);
@@ -390,7 +383,6 @@ static int intel_830mp_configure(void)
 
 static int intel_7505_configure(void)
 {
-	u32 temp;
 	u16 temp2;
 	struct aper_size_info_8 *current_size;
 
@@ -400,8 +392,8 @@ static int intel_7505_configure(void)
 	pci_write_config_byte(agp_bridge->dev, INTEL_APSIZE, current_size->size_value);
 
 	/* address to map to */
-	pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
-	agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
+	agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
+						    AGP_APERTURE_BAR);
 
 	/* attbase - aperture base */
 	pci_write_config_dword(agp_bridge->dev, INTEL_ATTBASE, agp_bridge->gatt_bus_addr);
diff --git a/drivers/char/agp/intel-agp.h b/drivers/char/agp/intel-agp.h
index 1042c1b90376..fda073dcd967 100644
--- a/drivers/char/agp/intel-agp.h
+++ b/drivers/char/agp/intel-agp.h
@@ -55,8 +55,8 @@
 #define INTEL_I860_ERRSTS	0xc8
 
 /* Intel i810 registers */
-#define I810_GMADDR		0x10
-#define I810_MMADDR		0x14
+#define I810_GMADR_BAR		0
+#define I810_MMADR_BAR		1
 #define I810_PTE_BASE		0x10000
 #define I810_PTE_MAIN_UNCACHED	0x00000000
 #define I810_PTE_LOCAL		0x00000002
@@ -113,9 +113,9 @@
 #define INTEL_I850_ERRSTS	0xc8
 
 /* intel 915G registers */
-#define I915_GMADDR	0x18
-#define I915_MMADDR	0x10
-#define I915_PTEADDR	0x1C
+#define I915_GMADR_BAR	2
+#define I915_MMADR_BAR	0
+#define I915_PTE_BAR	3
 #define I915_GMCH_GMS_STOLEN_48M	(0x6 << 4)
 #define I915_GMCH_GMS_STOLEN_64M	(0x7 << 4)
 #define G33_GMCH_GMS_STOLEN_128M	(0x8 << 4)
diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c
index b8e2014cb9cb..ad5da1ffcbe9 100644
--- a/drivers/char/agp/intel-gtt.c
+++ b/drivers/char/agp/intel-gtt.c
@@ -64,7 +64,7 @@ static struct _intel_private {
 	struct pci_dev *pcidev;	/* device one */
 	struct pci_dev *bridge_dev;
 	u8 __iomem *registers;
-	phys_addr_t gtt_bus_addr;
+	phys_addr_t gtt_phys_addr;
 	u32 PGETBL_save;
 	u32 __iomem *gtt;		/* I915G */
 	bool clear_fake_agp; /* on first access via agp, fill with scratch */
@@ -172,7 +172,7 @@ static void i8xx_destroy_pages(struct page *page)
 #define I810_GTT_ORDER 4
 static int i810_setup(void)
 {
-	u32 reg_addr;
+	phys_addr_t reg_addr;
 	char *gtt_table;
 
 	/* i81x does not preallocate the gtt. It's always 64kb in size. */
@@ -181,8 +181,7 @@ static int i810_setup(void)
 		return -ENOMEM;
 	intel_private.i81x_gtt_table = gtt_table;
 
-	pci_read_config_dword(intel_private.pcidev, I810_MMADDR, &reg_addr);
-	reg_addr &= 0xfff80000;
+	reg_addr = pci_resource_start(intel_private.pcidev, I810_MMADR_BAR);
 
 	intel_private.registers = ioremap(reg_addr, KB(64));
 	if (!intel_private.registers)
@@ -191,7 +190,7 @@ static int i810_setup(void)
 	writel(virt_to_phys(gtt_table) | I810_PGETBL_ENABLED,
 	       intel_private.registers+I810_PGETBL_CTL);
 
-	intel_private.gtt_bus_addr = reg_addr + I810_PTE_BASE;
+	intel_private.gtt_phys_addr = reg_addr + I810_PTE_BASE;
 
 	if ((readl(intel_private.registers+I810_DRAM_CTL)
 		& I810_DRAM_ROW_0) == I810_DRAM_ROW_0_SDRAM) {
@@ -608,9 +607,8 @@ static bool intel_gtt_can_wc(void)
 
 static int intel_gtt_init(void)
 {
-	u32 gma_addr;
 	u32 gtt_map_size;
-	int ret;
+	int ret, bar;
 
 	ret = intel_private.driver->setup();
 	if (ret != 0)
@@ -636,10 +634,10 @@ static int intel_gtt_init(void)
 
 	intel_private.gtt = NULL;
 	if (intel_gtt_can_wc())
-		intel_private.gtt = ioremap_wc(intel_private.gtt_bus_addr,
+		intel_private.gtt = ioremap_wc(intel_private.gtt_phys_addr,
 					       gtt_map_size);
 	if (intel_private.gtt == NULL)
-		intel_private.gtt = ioremap(intel_private.gtt_bus_addr,
+		intel_private.gtt = ioremap(intel_private.gtt_phys_addr,
 					    gtt_map_size);
 	if (intel_private.gtt == NULL) {
 		intel_private.driver->cleanup();
@@ -660,14 +658,11 @@ static int intel_gtt_init(void)
 	}
 
 	if (INTEL_GTT_GEN <= 2)
-		pci_read_config_dword(intel_private.pcidev, I810_GMADDR,
-				      &gma_addr);
+		bar = I810_GMADR_BAR;
 	else
-		pci_read_config_dword(intel_private.pcidev, I915_GMADDR,
-				      &gma_addr);
-
-	intel_private.gma_bus_addr = (gma_addr & PCI_BASE_ADDRESS_MEM_MASK);
+		bar = I915_GMADR_BAR;
 
+	intel_private.gma_bus_addr = pci_bus_address(intel_private.pcidev, bar);
 	return 0;
 }
 
@@ -787,16 +782,15 @@ EXPORT_SYMBOL(intel_enable_gtt);
 
 static int i830_setup(void)
 {
-	u32 reg_addr;
+	phys_addr_t reg_addr;
 
-	pci_read_config_dword(intel_private.pcidev, I810_MMADDR, &reg_addr);
-	reg_addr &= 0xfff80000;
+	reg_addr = pci_resource_start(intel_private.pcidev, I810_MMADR_BAR);
 
 	intel_private.registers = ioremap(reg_addr, KB(64));
 	if (!intel_private.registers)
 		return -ENOMEM;
 
-	intel_private.gtt_bus_addr = reg_addr + I810_PTE_BASE;
+	intel_private.gtt_phys_addr = reg_addr + I810_PTE_BASE;
 
 	return 0;
 }
@@ -1108,12 +1102,10 @@ static void i965_write_entry(dma_addr_t addr,
 
 static int i9xx_setup(void)
 {
-	u32 reg_addr, gtt_addr;
+	phys_addr_t reg_addr;
 	int size = KB(512);
 
-	pci_read_config_dword(intel_private.pcidev, I915_MMADDR, &reg_addr);
-
-	reg_addr &= 0xfff80000;
+	reg_addr = pci_resource_start(intel_private.pcidev, I915_MMADR_BAR);
 
 	intel_private.registers = ioremap(reg_addr, size);
 	if (!intel_private.registers)
@@ -1121,15 +1113,14 @@ static int i9xx_setup(void)
 
 	switch (INTEL_GTT_GEN) {
 	case 3:
-		pci_read_config_dword(intel_private.pcidev,
-				      I915_PTEADDR, &gtt_addr);
-		intel_private.gtt_bus_addr = gtt_addr;
+		intel_private.gtt_phys_addr =
+			pci_resource_start(intel_private.pcidev, I915_PTE_BAR);
 		break;
 	case 5:
-		intel_private.gtt_bus_addr = reg_addr + MB(2);
+		intel_private.gtt_phys_addr = reg_addr + MB(2);
 		break;
 	default:
-		intel_private.gtt_bus_addr = reg_addr + KB(512);
+		intel_private.gtt_phys_addr = reg_addr + KB(512);
 		break;
 	}
 
diff --git a/drivers/char/agp/nvidia-agp.c b/drivers/char/agp/nvidia-agp.c
index be42a2312dc9..a1861b75eb31 100644
--- a/drivers/char/agp/nvidia-agp.c
+++ b/drivers/char/agp/nvidia-agp.c
@@ -106,6 +106,7 @@ static int nvidia_configure(void)
 {
 	int i, rc, num_dirs;
 	u32 apbase, aplimit;
+	phys_addr_t apbase_phys;
 	struct aper_size_info_8 *current_size;
 	u32 temp;
 
@@ -115,9 +116,8 @@ static int nvidia_configure(void)
 	pci_write_config_byte(agp_bridge->dev, NVIDIA_0_APSIZE,
 		current_size->size_value);
 
-    /* address to map to */
-	pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &apbase);
-	apbase &= PCI_BASE_ADDRESS_MEM_MASK;
+	/* address to map to */
+	apbase = pci_bus_address(agp_bridge->dev, AGP_APERTURE_BAR);
 	agp_bridge->gart_bus_addr = apbase;
 	aplimit = apbase + (current_size->size * 1024 * 1024) - 1;
 	pci_write_config_dword(nvidia_private.dev_2, NVIDIA_2_APBASE, apbase);
@@ -153,8 +153,9 @@ static int nvidia_configure(void)
 	pci_write_config_dword(agp_bridge->dev, NVIDIA_0_APSIZE, temp | 0x100);
 
 	/* map aperture */
+	apbase_phys = pci_resource_start(agp_bridge->dev, AGP_APERTURE_BAR);
 	nvidia_private.aperture =
-		(volatile u32 __iomem *) ioremap(apbase, 33 * PAGE_SIZE);
+		(volatile u32 __iomem *) ioremap(apbase_phys, 33 * PAGE_SIZE);
 
 	if (!nvidia_private.aperture)
 		return -ENOMEM;
diff --git a/drivers/char/agp/sis-agp.c b/drivers/char/agp/sis-agp.c
index 79c838c434bc..2c74038da459 100644
--- a/drivers/char/agp/sis-agp.c
+++ b/drivers/char/agp/sis-agp.c
@@ -50,13 +50,12 @@ static void sis_tlbflush(struct agp_memory *mem)
 
 static int sis_configure(void)
 {
-	u32 temp;
 	struct aper_size_info_8 *current_size;
 
 	current_size = A_SIZE_8(agp_bridge->current_size);
 	pci_write_config_byte(agp_bridge->dev, SIS_TLBCNTRL, 0x05);
-	pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
-	agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
+	agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
+						    AGP_APERTURE_BAR);
 	pci_write_config_dword(agp_bridge->dev, SIS_ATTBASE,
 			       agp_bridge->gatt_bus_addr);
 	pci_write_config_byte(agp_bridge->dev, SIS_APSIZE,
diff --git a/drivers/char/agp/via-agp.c b/drivers/char/agp/via-agp.c
index 74d3aa3773bf..228f20cddc05 100644
--- a/drivers/char/agp/via-agp.c
+++ b/drivers/char/agp/via-agp.c
@@ -43,16 +43,15 @@ static int via_fetch_size(void)
 
 static int via_configure(void)
 {
-	u32 temp;
 	struct aper_size_info_8 *current_size;
 
 	current_size = A_SIZE_8(agp_bridge->current_size);
 	/* aperture size */
 	pci_write_config_byte(agp_bridge->dev, VIA_APSIZE,
 			      current_size->size_value);
-	/* address to map too */
-	pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
-	agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
+	/* address to map to */
+	agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
+						    AGP_APERTURE_BAR);
 
 	/* GART control register */
 	pci_write_config_dword(agp_bridge->dev, VIA_GARTCTRL, 0x0000000f);
@@ -132,9 +131,9 @@ static int via_configure_agp3(void)
 
 	current_size = A_SIZE_16(agp_bridge->current_size);
 
-	/* address to map too */
-	pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
-	agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
+	/* address to map to */
+	agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
+						    AGP_APERTURE_BAR);
 
 	/* attbase - aperture GATT base */
 	pci_write_config_dword(agp_bridge->dev, VIA_AGP3_ATTBASE,
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 3620a1b0a73c..15604b3dda3e 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -1260,14 +1260,14 @@ static int ggtt_probe_common(struct drm_device *dev,
 			     size_t gtt_size)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	phys_addr_t gtt_bus_addr;
+	phys_addr_t gtt_phys_addr;
 	int ret;
 
 	/* For Modern GENs the PTEs and register space are split in the BAR */
-	gtt_bus_addr = pci_resource_start(dev->pdev, 0) +
+	gtt_phys_addr = pci_resource_start(dev->pdev, 0) +
 		(pci_resource_len(dev->pdev, 0) / 2);
 
-	dev_priv->gtt.gsm = ioremap_wc(gtt_bus_addr, gtt_size);
+	dev_priv->gtt.gsm = ioremap_wc(gtt_phys_addr, gtt_size);
 	if (!dev_priv->gtt.gsm) {
 		DRM_ERROR("Failed to map the gtt page table\n");
 		return -ENOMEM;
diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
index a037d81f21ed..00660cc502c5 100644
--- a/drivers/pci/bus.c
+++ b/drivers/pci/bus.c
@@ -98,41 +98,54 @@ void pci_bus_remove_resources(struct pci_bus *bus)
 	}
 }
 
-/**
- * pci_bus_alloc_resource - allocate a resource from a parent bus
- * @bus: PCI bus
- * @res: resource to allocate
- * @size: size of resource to allocate
- * @align: alignment of resource to allocate
- * @min: minimum /proc/iomem address to allocate
- * @type_mask: IORESOURCE_* type flags
- * @alignf: resource alignment function
- * @alignf_data: data argument for resource alignment function
- *
- * Given the PCI bus a device resides on, the size, minimum address,
- * alignment and type, try to find an acceptable resource allocation
- * for a specific device resource.
+static struct pci_bus_region pci_32_bit = {0, 0xffffffffULL};
+#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
+static struct pci_bus_region pci_64_bit = {0,
+				(dma_addr_t) 0xffffffffffffffffULL};
+static struct pci_bus_region pci_high = {(dma_addr_t) 0x100000000ULL,
+				(dma_addr_t) 0xffffffffffffffffULL};
+#endif
+
+/*
+ * @res contains CPU addresses.  Clip it so the corresponding bus addresses
+ * on @bus are entirely within @region.  This is used to control the bus
+ * addresses of resources we allocate, e.g., we may need a resource that
+ * can be mapped by a 32-bit BAR.
  */
-int
-pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res,
+static void pci_clip_resource_to_region(struct pci_bus *bus,
+					struct resource *res,
+					struct pci_bus_region *region)
+{
+	struct pci_bus_region r;
+
+	pcibios_resource_to_bus(bus, &r, res);
+	if (r.start < region->start)
+		r.start = region->start;
+	if (r.end > region->end)
+		r.end = region->end;
+
+	if (r.end < r.start)
+		res->end = res->start - 1;
+	else
+		pcibios_bus_to_resource(bus, res, &r);
+}
+
+static int pci_bus_alloc_from_region(struct pci_bus *bus, struct resource *res,
 		resource_size_t size, resource_size_t align,
 		resource_size_t min, unsigned int type_mask,
 		resource_size_t (*alignf)(void *,
 					  const struct resource *,
 					  resource_size_t,
 					  resource_size_t),
-		void *alignf_data)
+		void *alignf_data,
+		struct pci_bus_region *region)
 {
-	int i, ret = -ENOMEM;
-	struct resource *r;
-	resource_size_t max = -1;
+	int i, ret;
+	struct resource *r, avail;
+	resource_size_t max;
 
 	type_mask |= IORESOURCE_IO | IORESOURCE_MEM;
 
-	/* don't allocate too high if the pref mem doesn't support 64bit*/
-	if (!(res->flags & IORESOURCE_MEM_64))
-		max = PCIBIOS_MAX_MEM_32;
-
 	pci_bus_for_each_resource(bus, r, i) {
 		if (!r)
 			continue;
@@ -147,15 +160,74 @@ pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res,
 		    !(res->flags & IORESOURCE_PREFETCH))
 			continue;
 
+		avail = *r;
+		pci_clip_resource_to_region(bus, &avail, region);
+		if (!resource_size(&avail))
+			continue;
+
+		/*
+		 * "min" is typically PCIBIOS_MIN_IO or PCIBIOS_MIN_MEM to
+		 * protect badly documented motherboard resources, but if
+		 * this is an already-configured bridge window, its start
+		 * overrides "min".
+		 */
+		if (avail.start)
+			min = avail.start;
+
+		max = avail.end;
+
 		/* Ok, try it out.. */
-		ret = allocate_resource(r, res, size,
-					r->start ? : min,
-					max, align,
-					alignf, alignf_data);
+		ret = allocate_resource(r, res, size, min, max,
+					align, alignf, alignf_data);
 		if (ret == 0)
-			break;
+			return 0;
 	}
-	return ret;
+	return -ENOMEM;
+}
+
+/**
+ * pci_bus_alloc_resource - allocate a resource from a parent bus
+ * @bus: PCI bus
+ * @res: resource to allocate
+ * @size: size of resource to allocate
+ * @align: alignment of resource to allocate
+ * @min: minimum /proc/iomem address to allocate
+ * @type_mask: IORESOURCE_* type flags
+ * @alignf: resource alignment function
+ * @alignf_data: data argument for resource alignment function
+ *
+ * Given the PCI bus a device resides on, the size, minimum address,
+ * alignment and type, try to find an acceptable resource allocation
+ * for a specific device resource.
+ */
+int pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res,
+		resource_size_t size, resource_size_t align,
+		resource_size_t min, unsigned int type_mask,
+		resource_size_t (*alignf)(void *,
+					  const struct resource *,
+					  resource_size_t,
+					  resource_size_t),
+		void *alignf_data)
+{
+#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
+	int rc;
+
+	if (res->flags & IORESOURCE_MEM_64) {
+		rc = pci_bus_alloc_from_region(bus, res, size, align, min,
+					       type_mask, alignf, alignf_data,
+					       &pci_high);
+		if (rc == 0)
+			return 0;
+
+		return pci_bus_alloc_from_region(bus, res, size, align, min,
+						 type_mask, alignf, alignf_data,
+						 &pci_64_bit);
+	}
+#endif
+
+	return pci_bus_alloc_from_region(bus, res, size, align, min,
+					 type_mask, alignf, alignf_data,
+					 &pci_32_bit);
 }
 
 void __weak pcibios_resource_survey_bus(struct pci_bus *bus) { }
diff --git a/drivers/pci/host-bridge.c b/drivers/pci/host-bridge.c
index a68dc613a5be..06ace6248c61 100644
--- a/drivers/pci/host-bridge.c
+++ b/drivers/pci/host-bridge.c
@@ -9,22 +9,19 @@
 
 #include "pci.h"
 
-static struct pci_bus *find_pci_root_bus(struct pci_dev *dev)
+static struct pci_bus *find_pci_root_bus(struct pci_bus *bus)
 {
-	struct pci_bus *bus;
-
-	bus = dev->bus;
 	while (bus->parent)
 		bus = bus->parent;
 
 	return bus;
 }
 
-static struct pci_host_bridge *find_pci_host_bridge(struct pci_dev *dev)
+static struct pci_host_bridge *find_pci_host_bridge(struct pci_bus *bus)
 {
-	struct pci_bus *bus = find_pci_root_bus(dev);
+	struct pci_bus *root_bus = find_pci_root_bus(bus);
 
-	return to_pci_host_bridge(bus->bridge);
+	return to_pci_host_bridge(root_bus->bridge);
 }
 
 void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
@@ -40,10 +37,10 @@ static bool resource_contains(struct resource *res1, struct resource *res2)
 	return res1->start <= res2->start && res1->end >= res2->end;
 }
 
-void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
+void pcibios_resource_to_bus(struct pci_bus *bus, struct pci_bus_region *region,
 			     struct resource *res)
 {
-	struct pci_host_bridge *bridge = find_pci_host_bridge(dev);
+	struct pci_host_bridge *bridge = find_pci_host_bridge(bus);
 	struct pci_host_bridge_window *window;
 	resource_size_t offset = 0;
 
@@ -68,10 +65,10 @@ static bool region_contains(struct pci_bus_region *region1,
 	return region1->start <= region2->start && region1->end >= region2->end;
 }
 
-void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
+void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res,
 			     struct pci_bus_region *region)
 {
-	struct pci_host_bridge *bridge = find_pci_host_bridge(dev);
+	struct pci_host_bridge *bridge = find_pci_host_bridge(bus);
 	struct pci_host_bridge_window *window;
 	resource_size_t offset = 0;
 
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 12ec56c9a913..23cdfac0bdb3 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -269,8 +269,8 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
 		region.end = l + sz;
 	}
 
-	pcibios_bus_to_resource(dev, res, &region);
-	pcibios_resource_to_bus(dev, &inverted_region, res);
+	pcibios_bus_to_resource(dev->bus, res, &region);
+	pcibios_resource_to_bus(dev->bus, &inverted_region, res);
 
 	/*
 	 * If "A" is a BAR value (a bus address), "bus_to_resource(A)" is
@@ -364,7 +364,7 @@ static void pci_read_bridge_io(struct pci_bus *child)
 		res->flags = (io_base_lo & PCI_IO_RANGE_TYPE_MASK) | IORESOURCE_IO;
 		region.start = base;
 		region.end = limit + io_granularity - 1;
-		pcibios_bus_to_resource(dev, res, &region);
+		pcibios_bus_to_resource(dev->bus, res, &region);
 		dev_printk(KERN_DEBUG, &dev->dev, "  bridge window %pR\n", res);
 	}
 }
@@ -386,7 +386,7 @@ static void pci_read_bridge_mmio(struct pci_bus *child)
 		res->flags = (mem_base_lo & PCI_MEMORY_RANGE_TYPE_MASK) | IORESOURCE_MEM;
 		region.start = base;
 		region.end = limit + 0xfffff;
-		pcibios_bus_to_resource(dev, res, &region);
+		pcibios_bus_to_resource(dev->bus, res, &region);
 		dev_printk(KERN_DEBUG, &dev->dev, "  bridge window %pR\n", res);
 	}
 }
@@ -436,7 +436,7 @@ static void pci_read_bridge_mmio_pref(struct pci_bus *child)
 			res->flags |= IORESOURCE_MEM_64;
 		region.start = base;
 		region.end = limit + 0xfffff;
-		pcibios_bus_to_resource(dev, res, &region);
+		pcibios_bus_to_resource(dev->bus, res, &region);
 		dev_printk(KERN_DEBUG, &dev->dev, "  bridge window %pR\n", res);
 	}
 }
@@ -1084,24 +1084,24 @@ int pci_setup_device(struct pci_dev *dev)
 				region.end = 0x1F7;
 				res = &dev->resource[0];
 				res->flags = LEGACY_IO_RESOURCE;
-				pcibios_bus_to_resource(dev, res, &region);
+				pcibios_bus_to_resource(dev->bus, res, &region);
 				region.start = 0x3F6;
 				region.end = 0x3F6;
 				res = &dev->resource[1];
 				res->flags = LEGACY_IO_RESOURCE;
-				pcibios_bus_to_resource(dev, res, &region);
+				pcibios_bus_to_resource(dev->bus, res, &region);
 			}
 			if ((progif & 4) == 0) {
 				region.start = 0x170;
 				region.end = 0x177;
 				res = &dev->resource[2];
 				res->flags = LEGACY_IO_RESOURCE;
-				pcibios_bus_to_resource(dev, res, &region);
+				pcibios_bus_to_resource(dev->bus, res, &region);
 				region.start = 0x376;
 				region.end = 0x376;
 				res = &dev->resource[3];
 				res->flags = LEGACY_IO_RESOURCE;
-				pcibios_bus_to_resource(dev, res, &region);
+				pcibios_bus_to_resource(dev->bus, res, &region);
 			}
 		}
 		break;
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index b3b1b9aa8863..4ad6bf6c107b 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -343,7 +343,7 @@ static void quirk_io_region(struct pci_dev *dev, int port,
 	/* Convert from PCI bus to resource space */
 	bus_region.start = region;
 	bus_region.end = region + size - 1;
-	pcibios_bus_to_resource(dev, res, &bus_region);
+	pcibios_bus_to_resource(dev->bus, res, &bus_region);
 
 	if (!pci_claim_resource(dev, nr))
 		dev_info(&dev->dev, "quirk: %pR claimed by %s\n", res, name);
diff --git a/drivers/pci/rom.c b/drivers/pci/rom.c
index c5d0a08a8747..5d595724e5f4 100644
--- a/drivers/pci/rom.c
+++ b/drivers/pci/rom.c
@@ -31,7 +31,7 @@ int pci_enable_rom(struct pci_dev *pdev)
 	if (!res->flags)
 		return -1;
 
-	pcibios_resource_to_bus(pdev, &region, res);
+	pcibios_resource_to_bus(pdev->bus, &region, res);
 	pci_read_config_dword(pdev, pdev->rom_base_reg, &rom_addr);
 	rom_addr &= ~PCI_ROM_ADDRESS_MASK;
 	rom_addr |= region.start | PCI_ROM_ADDRESS_ENABLE;
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 2e344a5581ae..138bdd6393be 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -475,7 +475,7 @@ void pci_setup_cardbus(struct pci_bus *bus)
 		 &bus->busn_res);
 
 	res = bus->resource[0];
-	pcibios_resource_to_bus(bridge, &region, res);
+	pcibios_resource_to_bus(bridge->bus, &region, res);
 	if (res->flags & IORESOURCE_IO) {
 		/*
 		 * The IO resource is allocated a range twice as large as it
@@ -489,7 +489,7 @@ void pci_setup_cardbus(struct pci_bus *bus)
 	}
 
 	res = bus->resource[1];
-	pcibios_resource_to_bus(bridge, &region, res);
+	pcibios_resource_to_bus(bridge->bus, &region, res);
 	if (res->flags & IORESOURCE_IO) {
 		dev_info(&bridge->dev, "  bridge window %pR\n", res);
 		pci_write_config_dword(bridge, PCI_CB_IO_BASE_1,
@@ -499,7 +499,7 @@ void pci_setup_cardbus(struct pci_bus *bus)
 	}
 
 	res = bus->resource[2];
-	pcibios_resource_to_bus(bridge, &region, res);
+	pcibios_resource_to_bus(bridge->bus, &region, res);
 	if (res->flags & IORESOURCE_MEM) {
 		dev_info(&bridge->dev, "  bridge window %pR\n", res);
 		pci_write_config_dword(bridge, PCI_CB_MEMORY_BASE_0,
@@ -509,7 +509,7 @@ void pci_setup_cardbus(struct pci_bus *bus)
 	}
 
 	res = bus->resource[3];
-	pcibios_resource_to_bus(bridge, &region, res);
+	pcibios_resource_to_bus(bridge->bus, &region, res);
 	if (res->flags & IORESOURCE_MEM) {
 		dev_info(&bridge->dev, "  bridge window %pR\n", res);
 		pci_write_config_dword(bridge, PCI_CB_MEMORY_BASE_1,
@@ -547,7 +547,7 @@ static void pci_setup_bridge_io(struct pci_bus *bus)
 
 	/* Set up the top and bottom of the PCI I/O segment for this bus. */
 	res = bus->resource[0];
-	pcibios_resource_to_bus(bridge, &region, res);
+	pcibios_resource_to_bus(bridge->bus, &region, res);
 	if (res->flags & IORESOURCE_IO) {
 		pci_read_config_word(bridge, PCI_IO_BASE, &l);
 		io_base_lo = (region.start >> 8) & io_mask;
@@ -578,7 +578,7 @@ static void pci_setup_bridge_mmio(struct pci_bus *bus)
 
 	/* Set up the top and bottom of the PCI Memory segment for this bus. */
 	res = bus->resource[1];
-	pcibios_resource_to_bus(bridge, &region, res);
+	pcibios_resource_to_bus(bridge->bus, &region, res);
 	if (res->flags & IORESOURCE_MEM) {
 		l = (region.start >> 16) & 0xfff0;
 		l |= region.end & 0xfff00000;
@@ -604,7 +604,7 @@ static void pci_setup_bridge_mmio_pref(struct pci_bus *bus)
 	/* Set up PREF base/limit. */
 	bu = lu = 0;
 	res = bus->resource[2];
-	pcibios_resource_to_bus(bridge, &region, res);
+	pcibios_resource_to_bus(bridge->bus, &region, res);
 	if (res->flags & IORESOURCE_PREFETCH) {
 		l = (region.start >> 16) & 0xfff0;
 		l |= region.end & 0xfff00000;
@@ -1424,7 +1424,7 @@ static int iov_resources_unassigned(struct pci_dev *dev, void *data)
 		if (!r->flags)
 			continue;
 
-		pcibios_resource_to_bus(dev, &region, r);
+		pcibios_resource_to_bus(dev->bus, &region, r);
 		if (!region.start) {
 			*unassigned = true;
 			return 1; /* return early from pci_walk_bus() */
diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c
index 83c4d3bc47ab..5c060b152ce6 100644
--- a/drivers/pci/setup-res.c
+++ b/drivers/pci/setup-res.c
@@ -52,7 +52,7 @@ void pci_update_resource(struct pci_dev *dev, int resno)
 	if (res->flags & IORESOURCE_PCI_FIXED)
 		return;
 
-	pcibios_resource_to_bus(dev, &region, res);
+	pcibios_resource_to_bus(dev->bus, &region, res);
 
 	new = region.start | (res->flags & PCI_REGION_FLAG_MASK);
 	if (res->flags & IORESOURCE_IO)
diff --git a/drivers/pcmcia/i82092.c b/drivers/pcmcia/i82092.c
index 519c4d6003a6..7d47456429a1 100644
--- a/drivers/pcmcia/i82092.c
+++ b/drivers/pcmcia/i82092.c
@@ -608,7 +608,7 @@ static int i82092aa_set_mem_map(struct pcmcia_socket *socket, struct pccard_mem_
 	
 	enter("i82092aa_set_mem_map");
 
-	pcibios_resource_to_bus(sock_info->dev, &region, mem->res);
+	pcibios_resource_to_bus(sock_info->dev->bus, &region, mem->res);
 	
 	map = mem->map;
 	if (map > 4) {
diff --git a/drivers/pcmcia/yenta_socket.c b/drivers/pcmcia/yenta_socket.c
index dc18a3a5e010..8485761e76af 100644
--- a/drivers/pcmcia/yenta_socket.c
+++ b/drivers/pcmcia/yenta_socket.c
@@ -445,7 +445,7 @@ static int yenta_set_mem_map(struct pcmcia_socket *sock, struct pccard_mem_map *
 	unsigned int start, stop, card_start;
 	unsigned short word;
 
-	pcibios_resource_to_bus(socket->dev, &region, mem->res);
+	pcibios_resource_to_bus(socket->dev->bus, &region, mem->res);
 
 	map = mem->map;
 	start = region.start;
@@ -709,7 +709,7 @@ static int yenta_allocate_res(struct yenta_socket *socket, int nr, unsigned type
 	region.start = config_readl(socket, addr_start) & mask;
 	region.end = config_readl(socket, addr_end) | ~mask;
 	if (region.start && region.end > region.start && !override_bios) {
-		pcibios_bus_to_resource(dev, res, &region);
+		pcibios_bus_to_resource(dev->bus, res, &region);
 		if (pci_claim_resource(dev, PCI_BRIDGE_RESOURCES + nr) == 0)
 			return 0;
 		dev_printk(KERN_INFO, &dev->dev,
@@ -1033,7 +1033,7 @@ static void yenta_config_init(struct yenta_socket *socket)
 	struct pci_dev *dev = socket->dev;
 	struct pci_bus_region region;
 
-	pcibios_resource_to_bus(socket->dev, &region, &dev->resource[0]);
+	pcibios_resource_to_bus(socket->dev->bus, &region, &dev->resource[0]);
 
 	config_writel(socket, CB_LEGACY_MODE_BASE, 0);
 	config_writel(socket, PCI_BASE_ADDRESS_0, region.start);
diff --git a/drivers/scsi/sym53c8xx_2/sym_glue.c b/drivers/scsi/sym53c8xx_2/sym_glue.c
index bac55f7f69f9..6d3ee1ab6362 100644
--- a/drivers/scsi/sym53c8xx_2/sym_glue.c
+++ b/drivers/scsi/sym53c8xx_2/sym_glue.c
@@ -1531,7 +1531,7 @@ static int sym_iomap_device(struct sym_device *device)
 	struct pci_bus_region bus_addr;
 	int i = 2;
 
-	pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[1]);
+	pcibios_resource_to_bus(pdev->bus, &bus_addr, &pdev->resource[1]);
 	device->mmio_base = bus_addr.start;
 
 	if (device->chip.features & FE_RAM) {
@@ -1541,7 +1541,8 @@ static int sym_iomap_device(struct sym_device *device)
 		 */
 		if (!pdev->resource[i].flags)
 			i++;
-		pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[i]);
+		pcibios_resource_to_bus(pdev->bus, &bus_addr,
+					&pdev->resource[i]);
 		device->ram_base = bus_addr.start;
 	}
 
diff --git a/drivers/video/arkfb.c b/drivers/video/arkfb.c
index a6b29bd4a12a..adc4ea2cc5a0 100644
--- a/drivers/video/arkfb.c
+++ b/drivers/video/arkfb.c
@@ -1014,7 +1014,7 @@ static int ark_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 
 	vga_res.flags = IORESOURCE_IO;
 
-	pcibios_bus_to_resource(dev, &vga_res, &bus_reg);
+	pcibios_bus_to_resource(dev->bus, &vga_res, &bus_reg);
 
 	par->state.vgabase = (void __iomem *) vga_res.start;
 
diff --git a/drivers/video/s3fb.c b/drivers/video/s3fb.c
index 968b2997175a..9a3f8f1c6aab 100644
--- a/drivers/video/s3fb.c
+++ b/drivers/video/s3fb.c
@@ -1180,7 +1180,7 @@ static int s3_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 
 	vga_res.flags = IORESOURCE_IO;
 
-	pcibios_bus_to_resource(dev, &vga_res, &bus_reg);
+	pcibios_bus_to_resource(dev->bus, &vga_res, &bus_reg);
 
 	par->state.vgabase = (void __iomem *) vga_res.start;
 
diff --git a/drivers/video/vt8623fb.c b/drivers/video/vt8623fb.c
index 8bc6e0958a09..5c7cbc6c6236 100644
--- a/drivers/video/vt8623fb.c
+++ b/drivers/video/vt8623fb.c
@@ -729,7 +729,7 @@ static int vt8623_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 
 	vga_res.flags = IORESOURCE_IO;
 
-	pcibios_bus_to_resource(dev, &vga_res, &bus_reg);
+	pcibios_bus_to_resource(dev->bus, &vga_res, &bus_reg);
 
 	par->state.vgabase = (void __iomem *) vga_res.start;
 
diff --git a/include/linux/pci.h b/include/linux/pci.h
index b89069839020..f7d1dcc002fa 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -552,8 +552,8 @@ int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,
 		  int reg, int len, u32 val);
 
 struct pci_bus_region {
-	resource_size_t start;
-	resource_size_t end;
+	dma_addr_t start;
+	dma_addr_t end;
 };
 
 struct pci_dynids {
@@ -737,9 +737,9 @@ void pci_fixup_cardbus(struct pci_bus *);
 
 /* Generic PCI functions used internally */
 
-void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
+void pcibios_resource_to_bus(struct pci_bus *bus, struct pci_bus_region *region,
 			     struct resource *res);
-void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
+void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res,
 			     struct pci_bus_region *region);
 void pcibios_scan_specific_bus(int busn);
 struct pci_bus *pci_find_bus(int domain, int busnr);
@@ -1089,6 +1089,14 @@ int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
 						  resource_size_t),
 			void *alignf_data);
 
+static inline dma_addr_t pci_bus_address(struct pci_dev *pdev, int bar)
+{
+	struct pci_bus_region region;
+
+	pcibios_resource_to_bus(pdev->bus, &region, &pdev->resource[bar]);
+	return region.start;
+}
+
 /* Proper probing supporting hot-pluggable devices */
 int __must_check __pci_register_driver(struct pci_driver *, struct module *,
 				       const char *mod_name);
@@ -1510,10 +1518,6 @@ static inline struct pci_dev *pci_dev_get(struct pci_dev *dev)
 
 #include <asm/pci.h>
 
-#ifndef PCIBIOS_MAX_MEM_32
-#define PCIBIOS_MAX_MEM_32 (-1)
-#endif
-
 /* these helpers provide future and backwards compatibility
  * for accessing popular PCI BAR info */
 #define pci_resource_start(dev, bar)	((dev)->resource[(bar)].start)