9 files changed, 1138 insertions, 1575 deletions

diff --git a/drivers/pci/hotplug/Kconfig b/drivers/pci/hotplug/Kconfig
index 1a4d4ca2a4d..9c4a39ee89b 100644
--- a/drivers/pci/hotplug/Kconfig
+++ b/drivers/pci/hotplug/Kconfig
@@ -187,9 +187,10 @@ config HOTPLUG_PCI_RPA_DLPAR
 
 config HOTPLUG_PCI_SGI
 	tristate "SGI PCI Hotplug Support"
-	depends on HOTPLUG_PCI && IA64_SGI_SN2
+	depends on HOTPLUG_PCI && (IA64_SGI_SN2 || IA64_GENERIC)
 	help
-	  Say Y here if you have an SGI IA64 Altix system.
+	  Say Y here if you want to use the SGI Altix Hotplug
+	  Driver for PCI devices.
 
 	  When in doubt, say N.
 
diff --git a/drivers/pci/hotplug/Makefile b/drivers/pci/hotplug/Makefile
index 93c120ddbd3..31a307004b9 100644
--- a/drivers/pci/hotplug/Makefile
+++ b/drivers/pci/hotplug/Makefile
@@ -14,6 +14,7 @@ obj-$(CONFIG_HOTPLUG_PCI_PCIE)		+= pciehp.o
 obj-$(CONFIG_HOTPLUG_PCI_SHPC)		+= shpchp.o
 obj-$(CONFIG_HOTPLUG_PCI_RPA)		+= rpaphp.o
 obj-$(CONFIG_HOTPLUG_PCI_RPA_DLPAR)	+= rpadlpar_io.o
+obj-$(CONFIG_HOTPLUG_PCI_SGI)		+= sgi_hotplug.o
 
 pci_hotplug-objs	:=	pci_hotplug_core.o
 
@@ -36,9 +37,7 @@ ibmphp-objs		:=	ibmphp_core.o	\
 				ibmphp_hpc.o
 
 acpiphp-objs		:=	acpiphp_core.o	\
-				acpiphp_glue.o	\
-				acpiphp_pci.o	\
-				acpiphp_res.o
+				acpiphp_glue.o
 
 rpaphp-objs		:=	rpaphp_core.o	\
 				rpaphp_pci.o	\
diff --git a/drivers/pci/hotplug/acpiphp.h b/drivers/pci/hotplug/acpiphp.h
index d9499874c8a..293603e1b7c 100644
--- a/drivers/pci/hotplug/acpiphp.h
+++ b/drivers/pci/hotplug/acpiphp.h
@@ -7,6 +7,8 @@
  * Copyright (C) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com)
  * Copyright (C) 2002,2003 Takayoshi Kochi (t-kochi@bq.jp.nec.com)
  * Copyright (C) 2002,2003 NEC Corporation
+ * Copyright (C) 2003-2005 Matthew Wilcox (matthew.wilcox@hp.com)
+ * Copyright (C) 2003-2005 Hewlett Packard
  *
  * All rights reserved.
  *
@@ -52,7 +54,6 @@
 
 struct acpiphp_bridge;
 struct acpiphp_slot;
-struct pci_resource;
 
 /*
  * struct slot - slot information for each *physical* slot
@@ -65,15 +66,6 @@ struct slot {
 	struct acpiphp_slot	*acpi_slot;
 };
 
-/*
- * struct pci_resource - describes pci resource (mem, pfmem, io, bus)
- */
-struct pci_resource {
-	struct pci_resource * next;
-	u64 base;
-	u32 length;
-};
-
 /**
  * struct hpp_param - ACPI 2.0 _HPP Hot Plug Parameters
  * @cache_line_size in DWORD
@@ -101,10 +93,6 @@ struct acpiphp_bridge {
 	int type;
 	int nr_slots;
 
-	u8 seg;
-	u8 bus;
-	u8 sub;
-
 	u32 flags;
 
 	/* This bus (host bridge) or Secondary bus (PCI-to-PCI bridge) */
@@ -117,12 +105,6 @@ struct acpiphp_bridge {
 	struct hpp_param hpp;
 
 	spinlock_t res_lock;
-
-	/* available resources on this bus */
-	struct pci_resource *mem_head;
-	struct pci_resource *p_mem_head;
-	struct pci_resource *io_head;
-	struct pci_resource *bus_head;
 };
 
 
@@ -163,12 +145,6 @@ struct acpiphp_func {
 
 	u8		function;	/* pci function# */
 	u32		flags;		/* see below */
-
-	/* resources used for this function */
-	struct pci_resource *mem_head;
-	struct pci_resource *p_mem_head;
-	struct pci_resource *io_head;
-	struct pci_resource *bus_head;
 };
 
 /**
@@ -243,25 +219,6 @@ extern u8 acpiphp_get_latch_status (struct acpiphp_slot *slot);
 extern u8 acpiphp_get_adapter_status (struct acpiphp_slot *slot);
 extern u32 acpiphp_get_address (struct acpiphp_slot *slot);
 
-/* acpiphp_pci.c */
-extern struct pci_dev *acpiphp_allocate_pcidev (struct pci_bus *pbus, int dev, int fn);
-extern int acpiphp_configure_slot (struct acpiphp_slot *slot);
-extern int acpiphp_configure_function (struct acpiphp_func *func);
-extern void acpiphp_unconfigure_function (struct acpiphp_func *func);
-extern int acpiphp_detect_pci_resource (struct acpiphp_bridge *bridge);
-extern int acpiphp_init_func_resource (struct acpiphp_func *func);
-
-/* acpiphp_res.c */
-extern struct pci_resource *acpiphp_get_io_resource (struct pci_resource **head, u32 size);
-extern struct pci_resource *acpiphp_get_resource (struct pci_resource **head, u32 size);
-extern struct pci_resource *acpiphp_get_resource_with_base (struct pci_resource **head, u64 base, u32 size);
-extern int acpiphp_resource_sort_and_combine (struct pci_resource **head);
-extern struct pci_resource *acpiphp_make_resource (u64 base, u32 length);
-extern void acpiphp_move_resource (struct pci_resource **from, struct pci_resource **to);
-extern void acpiphp_free_resource (struct pci_resource **res);
-extern void acpiphp_dump_resource (struct acpiphp_bridge *bridge); /* debug */
-extern void acpiphp_dump_func_resource (struct acpiphp_func *func); /* debug */
-
 /* variables */
 extern int acpiphp_debug;
 
diff --git a/drivers/pci/hotplug/acpiphp_core.c b/drivers/pci/hotplug/acpiphp_core.c
index 4539e61a3dc..60c4c38047a 100644
--- a/drivers/pci/hotplug/acpiphp_core.c
+++ b/drivers/pci/hotplug/acpiphp_core.c
@@ -7,6 +7,8 @@
  * Copyright (C) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com)
  * Copyright (C) 2002,2003 Takayoshi Kochi (t-kochi@bq.jp.nec.com)
  * Copyright (C) 2002,2003 NEC Corporation
+ * Copyright (C) 2003-2005 Matthew Wilcox (matthew.wilcox@hp.com)
+ * Copyright (C) 2003-2005 Hewlett Packard
  *
  * All rights reserved.
  *
@@ -53,8 +55,8 @@ int acpiphp_debug;
 static int num_slots;
 static struct acpiphp_attention_info *attention_info;
 
-#define DRIVER_VERSION	"0.4"
-#define DRIVER_AUTHOR	"Greg Kroah-Hartman <gregkh@us.ibm.com>, Takayoshi Kochi <t-kochi@bq.jp.nec.com>"
+#define DRIVER_VERSION	"0.5"
+#define DRIVER_AUTHOR	"Greg Kroah-Hartman <gregkh@us.ibm.com>, Takayoshi Kochi <t-kochi@bq.jp.nec.com>, Matthew Wilcox <willy@hp.com>"
 #define DRIVER_DESC	"ACPI Hot Plug PCI Controller Driver"
 
 MODULE_AUTHOR(DRIVER_AUTHOR);
@@ -281,8 +283,7 @@ static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
 /**
  * get_address - get pci address of a slot
  * @hotplug_slot: slot to get status
- * @busdev: pointer to struct pci_busdev (seg, bus, dev)
- *
+ * @value: pointer to struct pci_busdev (seg, bus, dev)
  */
 static int get_address(struct hotplug_slot *hotplug_slot, u32 *value)
 {
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index e7f41294f81..424e7de181a 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -4,6 +4,10 @@
  * Copyright (C) 2002,2003 Takayoshi Kochi (t-kochi@bq.jp.nec.com)
  * Copyright (C) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com)
  * Copyright (C) 2002,2003 NEC Corporation
+ * Copyright (C) 2003-2005 Matthew Wilcox (matthew.wilcox@hp.com)
+ * Copyright (C) 2003-2005 Hewlett Packard
+ * Copyright (C) 2005 Rajesh Shah (rajesh.shah@intel.com)
+ * Copyright (C) 2005 Intel Corporation
  *
  * All rights reserved.
  *
@@ -26,6 +30,16 @@
  *
  */
 
+/*
+ * Lifetime rules for pci_dev:
+ *  - The one in acpiphp_func has its refcount elevated by pci_get_slot()
+ *    when the driver is loaded or when an insertion event occurs.  It loses
+ *    a refcount when its ejected or the driver unloads.
+ *  - The one in acpiphp_bridge has its refcount elevated by pci_get_slot()
+ *    when the bridge is scanned and it loses a refcount when the bridge
+ *    is removed.
+ */
+
 #include <linux/init.h>
 #include <linux/module.h>
 
@@ -178,21 +192,18 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
 
 		bridge->nr_slots++;
 
-		dbg("found ACPI PCI Hotplug slot at PCI %02x:%02x Slot:%d\n",
-		    slot->bridge->bus, slot->device, slot->sun);
+		dbg("found ACPI PCI Hotplug slot %d at PCI %04x:%02x:%02x\n",
+				slot->sun, pci_domain_nr(bridge->pci_bus),
+				bridge->pci_bus->number, slot->device);
 	}
 
 	newfunc->slot = slot;
 	list_add_tail(&newfunc->sibling, &slot->funcs);
 
 	/* associate corresponding pci_dev */
-	newfunc->pci_dev = pci_find_slot(bridge->bus,
+	newfunc->pci_dev = pci_get_slot(bridge->pci_bus,
 					 PCI_DEVFN(device, function));
 	if (newfunc->pci_dev) {
-		if (acpiphp_init_func_resource(newfunc) < 0) {
-			kfree(newfunc);
-			return AE_ERROR;
-		}
 		slot->flags |= (SLOT_ENABLED | SLOT_POWEREDON);
 	}
 
@@ -227,62 +238,6 @@ static int detect_ejectable_slots(acpi_handle *bridge_handle)
 }
 
 
-/* decode ACPI _CRS data and convert into our internal resource list
- * TBD: _TRA, etc.
- */
-static acpi_status
-decode_acpi_resource(struct acpi_resource *resource, void *context)
-{
-	struct acpiphp_bridge *bridge = (struct acpiphp_bridge *) context;
-	struct acpi_resource_address64 address;
-	struct pci_resource *res;
-
-	if (resource->id != ACPI_RSTYPE_ADDRESS16 &&
-	    resource->id != ACPI_RSTYPE_ADDRESS32 &&
-	    resource->id != ACPI_RSTYPE_ADDRESS64)
-		return AE_OK;
-
-	acpi_resource_to_address64(resource, &address);
-
-	if (address.producer_consumer == ACPI_PRODUCER && address.address_length > 0) {
-		dbg("resource type: %d: 0x%llx - 0x%llx\n", address.resource_type,
-		    (unsigned long long)address.min_address_range,
-		    (unsigned long long)address.max_address_range);
-		res = acpiphp_make_resource(address.min_address_range,
-				    address.address_length);
-		if (!res) {
-			err("out of memory\n");
-			return AE_OK;
-		}
-
-		switch (address.resource_type) {
-		case ACPI_MEMORY_RANGE:
-			if (address.attribute.memory.cache_attribute == ACPI_PREFETCHABLE_MEMORY) {
-				res->next = bridge->p_mem_head;
-				bridge->p_mem_head = res;
-			} else {
-				res->next = bridge->mem_head;
-				bridge->mem_head = res;
-			}
-			break;
-		case ACPI_IO_RANGE:
-			res->next = bridge->io_head;
-			bridge->io_head = res;
-			break;
-		case ACPI_BUS_NUMBER_RANGE:
-			res->next = bridge->bus_head;
-			bridge->bus_head = res;
-			break;
-		default:
-			/* invalid type */
-			kfree(res);
-			break;
-		}
-	}
-
-	return AE_OK;
-}
-
 /* decode ACPI 2.0 _HPP hot plug parameters */
 static void decode_hpp(struct acpiphp_bridge *bridge)
 {
@@ -346,34 +301,29 @@ static void init_bridge_misc(struct acpiphp_bridge *bridge)
 	/* decode ACPI 2.0 _HPP (hot plug parameters) */
 	decode_hpp(bridge);
 
-	/* subtract all resources already allocated */
-	acpiphp_detect_pci_resource(bridge);
-
 	/* register all slot objects under this bridge */
 	status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge->handle, (u32)1,
 				     register_slot, bridge, NULL);
 
 	/* install notify handler */
-	status = acpi_install_notify_handler(bridge->handle,
+	if (bridge->type != BRIDGE_TYPE_HOST) {
+		status = acpi_install_notify_handler(bridge->handle,
 					     ACPI_SYSTEM_NOTIFY,
 					     handle_hotplug_event_bridge,
 					     bridge);
 
-	if (ACPI_FAILURE(status)) {
-		err("failed to register interrupt notify handler\n");
+		if (ACPI_FAILURE(status)) {
+			err("failed to register interrupt notify handler\n");
+		}
 	}
 
 	list_add(&bridge->list, &bridge_list);
-
-	dbg("Bridge resource:\n");
-	acpiphp_dump_resource(bridge);
 }
 
 
 /* allocate and initialize host bridge data structure */
-static void add_host_bridge(acpi_handle *handle, int seg, int bus)
+static void add_host_bridge(acpi_handle *handle, struct pci_bus *pci_bus)
 {
-	acpi_status status;
 	struct acpiphp_bridge *bridge;
 
 	bridge = kmalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL);
@@ -384,52 +334,19 @@ static void add_host_bridge(acpi_handle *handle, int seg, int bus)
 
 	bridge->type = BRIDGE_TYPE_HOST;
 	bridge->handle = handle;
-	bridge->seg = seg;
-	bridge->bus = bus;
 
-	bridge->pci_bus = pci_find_bus(seg, bus);
+	bridge->pci_bus = pci_bus;
 
 	spin_lock_init(&bridge->res_lock);
 
-	/* to be overridden when we decode _CRS	*/
-	bridge->sub = bridge->bus;
-
-	/* decode resources */
-
-	status = acpi_walk_resources(handle, METHOD_NAME__CRS,
-		decode_acpi_resource, bridge);
-
-	if (ACPI_FAILURE(status)) {
-		err("failed to decode bridge resources\n");
-		kfree(bridge);
-		return;
-	}
-
-	acpiphp_resource_sort_and_combine(&bridge->io_head);
-	acpiphp_resource_sort_and_combine(&bridge->mem_head);
-	acpiphp_resource_sort_and_combine(&bridge->p_mem_head);
-	acpiphp_resource_sort_and_combine(&bridge->bus_head);
-
-	dbg("ACPI _CRS resource:\n");
-	acpiphp_dump_resource(bridge);
-
-	if (bridge->bus_head) {
-		bridge->bus = bridge->bus_head->base;
-		bridge->sub = bridge->bus_head->base + bridge->bus_head->length - 1;
-	}
-
 	init_bridge_misc(bridge);
 }
 
 
 /* allocate and initialize PCI-to-PCI bridge data structure */
-static void add_p2p_bridge(acpi_handle *handle, int seg, int bus, int dev, int fn)
+static void add_p2p_bridge(acpi_handle *handle, struct pci_dev *pci_dev)
 {
 	struct acpiphp_bridge *bridge;
-	u8 tmp8;
-	u16 tmp16;
-	u64 base64, limit64;
-	u32 base, limit, base32u, limit32u;
 
 	bridge = kmalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL);
 	if (bridge == NULL) {
@@ -441,133 +358,22 @@ static void add_p2p_bridge(acpi_handle *handle, int seg, int bus, int dev, int f
 
 	bridge->type = BRIDGE_TYPE_P2P;
 	bridge->handle = handle;
-	bridge->seg = seg;
-
-	bridge->pci_dev = pci_find_slot(bus, PCI_DEVFN(dev, fn));
-	if (!bridge->pci_dev) {
-		err("Can't get pci_dev\n");
-		kfree(bridge);
-		return;
-	}
 
-	bridge->pci_bus = bridge->pci_dev->subordinate;
+	bridge->pci_dev = pci_dev_get(pci_dev);
+	bridge->pci_bus = pci_dev->subordinate;
 	if (!bridge->pci_bus) {
 		err("This is not a PCI-to-PCI bridge!\n");
-		kfree(bridge);
-		return;
+		goto err;
 	}
 
 	spin_lock_init(&bridge->res_lock);
 
-	bridge->bus = bridge->pci_bus->number;
-	bridge->sub = bridge->pci_bus->subordinate;
-
-	/*
-	 * decode resources under this P2P bridge
-	 */
-
-	/* I/O resources */
-	pci_read_config_byte(bridge->pci_dev, PCI_IO_BASE, &tmp8);
-	base = tmp8;
-	pci_read_config_byte(bridge->pci_dev, PCI_IO_LIMIT, &tmp8);
-	limit = tmp8;
-
-	switch (base & PCI_IO_RANGE_TYPE_MASK) {
-	case PCI_IO_RANGE_TYPE_16:
-		base = (base << 8) & 0xf000;
-		limit = ((limit << 8) & 0xf000) + 0xfff;
-		bridge->io_head = acpiphp_make_resource((u64)base, limit - base + 1);
-		if (!bridge->io_head) {
-			err("out of memory\n");
-			kfree(bridge);
-			return;
-		}
-		dbg("16bit I/O range: %04x-%04x\n",
-		    (u32)bridge->io_head->base,
-		    (u32)(bridge->io_head->base + bridge->io_head->length - 1));
-		break;
-	case PCI_IO_RANGE_TYPE_32:
-		pci_read_config_word(bridge->pci_dev, PCI_IO_BASE_UPPER16, &tmp16);
-		base = ((u32)tmp16 << 16) | ((base << 8) & 0xf000);
-		pci_read_config_word(bridge->pci_dev, PCI_IO_LIMIT_UPPER16, &tmp16);
-		limit = (((u32)tmp16 << 16) | ((limit << 8) & 0xf000)) + 0xfff;
-		bridge->io_head = acpiphp_make_resource((u64)base, limit - base + 1);
-		if (!bridge->io_head) {
-			err("out of memory\n");
-			kfree(bridge);
-			return;
-		}
-		dbg("32bit I/O range: %08x-%08x\n",
-		    (u32)bridge->io_head->base,
-		    (u32)(bridge->io_head->base + bridge->io_head->length - 1));
-		break;
-	case 0x0f:
-		dbg("I/O space unsupported\n");
-		break;
-	default:
-		warn("Unknown I/O range type\n");
-	}
-
-	/* Memory resources (mandatory for P2P bridge) */
-	pci_read_config_word(bridge->pci_dev, PCI_MEMORY_BASE, &tmp16);
-	base = (tmp16 & 0xfff0) << 16;
-	pci_read_config_word(bridge->pci_dev, PCI_MEMORY_LIMIT, &tmp16);
-	limit = ((tmp16 & 0xfff0) << 16) | 0xfffff;
-	bridge->mem_head = acpiphp_make_resource((u64)base, limit - base + 1);
-	if (!bridge->mem_head) {
-		err("out of memory\n");
-		kfree(bridge);
-		return;
-	}
-	dbg("32bit Memory range: %08x-%08x\n",
-	    (u32)bridge->mem_head->base,
-	    (u32)(bridge->mem_head->base + bridge->mem_head->length-1));
-
-	/* Prefetchable Memory resources (optional) */
-	pci_read_config_word(bridge->pci_dev, PCI_PREF_MEMORY_BASE, &tmp16);
-	base = tmp16;
-	pci_read_config_word(bridge->pci_dev, PCI_PREF_MEMORY_LIMIT, &tmp16);
-	limit = tmp16;
-
-	switch (base & PCI_MEMORY_RANGE_TYPE_MASK) {
-	case PCI_PREF_RANGE_TYPE_32:
-		base = (base & 0xfff0) << 16;
-		limit = ((limit & 0xfff0) << 16) | 0xfffff;
-		bridge->p_mem_head = acpiphp_make_resource((u64)base, limit - base + 1);
-		if (!bridge->p_mem_head) {
-			err("out of memory\n");
-			kfree(bridge);
-			return;
-		}
-		dbg("32bit Prefetchable memory range: %08x-%08x\n",
-		    (u32)bridge->p_mem_head->base,
-		    (u32)(bridge->p_mem_head->base + bridge->p_mem_head->length - 1));
-		break;
-	case PCI_PREF_RANGE_TYPE_64:
-		pci_read_config_dword(bridge->pci_dev, PCI_PREF_BASE_UPPER32, &base32u);
-		pci_read_config_dword(bridge->pci_dev, PCI_PREF_LIMIT_UPPER32, &limit32u);
-		base64 = ((u64)base32u << 32) | ((base & 0xfff0) << 16);
-		limit64 = (((u64)limit32u << 32) | ((limit & 0xfff0) << 16)) + 0xfffff;
-
-		bridge->p_mem_head = acpiphp_make_resource(base64, limit64 - base64 + 1);
-		if (!bridge->p_mem_head) {
-			err("out of memory\n");
-			kfree(bridge);
-			return;
-		}
-		dbg("64bit Prefetchable memory range: %08x%08x-%08x%08x\n",
-		    (u32)(bridge->p_mem_head->base >> 32),
-		    (u32)(bridge->p_mem_head->base & 0xffffffff),
-		    (u32)((bridge->p_mem_head->base + bridge->p_mem_head->length - 1) >> 32),
-		    (u32)((bridge->p_mem_head->base + bridge->p_mem_head->length - 1) & 0xffffffff));
-		break;
-	case 0x0f:
-		break;
-	default:
-		warn("Unknown prefetchale memory type\n");
-	}
-
 	init_bridge_misc(bridge);
+	return;
+ err:
+	pci_dev_put(pci_dev);
+	kfree(bridge);
+	return;
 }
 
 
@@ -577,14 +383,10 @@ find_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv)
 {
 	acpi_status status;
 	acpi_handle dummy_handle;
-	unsigned long *segbus = context;
 	unsigned long tmp;
-	int seg, bus, device, function;
+	int device, function;
 	struct pci_dev *dev;
-
-	/* get PCI address */
-	seg = (*segbus >> 8) & 0xff;
-	bus = *segbus & 0xff;
+	struct pci_bus *pci_bus = context;
 
 	status = acpi_get_handle(handle, "_ADR", &dummy_handle);
 	if (ACPI_FAILURE(status))
@@ -599,20 +401,19 @@ find_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv)
 	device = (tmp >> 16) & 0xffff;
 	function = tmp & 0xffff;
 
-	dev = pci_find_slot(bus, PCI_DEVFN(device, function));
+	dev = pci_get_slot(pci_bus, PCI_DEVFN(device, function));
 
-	if (!dev)
-		return AE_OK;
-
-	if (!dev->subordinate)
-		return AE_OK;
+	if (!dev || !dev->subordinate)
+		goto out;
 
 	/* check if this bridge has ejectable slots */
 	if (detect_ejectable_slots(handle) > 0) {
 		dbg("found PCI-to-PCI bridge at PCI %s\n", pci_name(dev));
-		add_p2p_bridge(handle, seg, bus, device, function);
+		add_p2p_bridge(handle, dev);
 	}
 
+ out:
+	pci_dev_put(dev);
 	return AE_OK;
 }
 
@@ -624,6 +425,7 @@ static int add_bridge(acpi_handle handle)
 	unsigned long tmp;
 	int seg, bus;
 	acpi_handle dummy_handle;
+	struct pci_bus *pci_bus;
 
 	/* if the bridge doesn't have _STA, we assume it is always there */
 	status = acpi_get_handle(handle, "_STA", &dummy_handle);
@@ -653,18 +455,22 @@ static int add_bridge(acpi_handle handle)
 		bus = 0;
 	}
 
+	pci_bus = pci_find_bus(seg, bus);
+	if (!pci_bus) {
+		err("Can't find bus %04x:%02x\n", seg, bus);
+		return 0;
+	}
+
 	/* check if this bridge has ejectable slots */
 	if (detect_ejectable_slots(handle) > 0) {
 		dbg("found PCI host-bus bridge with hot-pluggable slots\n");
-		add_host_bridge(handle, seg, bus);
+		add_host_bridge(handle, pci_bus);
 		return 0;
 	}
 
-	tmp = seg << 8 | bus;
-
 	/* search P2P bridges under this host bridge */
 	status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1,
-				     find_p2p_bridge, &tmp, NULL);
+				     find_p2p_bridge, pci_bus, NULL);
 
 	if (ACPI_FAILURE(status))
 		warn("find_p2p_bridge faied (error code = 0x%x)\n",status);
@@ -672,12 +478,205 @@ static int add_bridge(acpi_handle handle)
 	return 0;
 }
 
+static struct acpiphp_bridge *acpiphp_handle_to_bridge(acpi_handle handle)
+{
+	struct list_head *head;
+	list_for_each(head, &bridge_list) {
+		struct acpiphp_bridge *bridge = list_entry(head,
+						struct acpiphp_bridge, list);
+		if (bridge->handle == handle)
+			return bridge;
+	}
+
+	return NULL;
+}
+
+static void cleanup_bridge(struct acpiphp_bridge *bridge)
+{
+	struct list_head *list, *tmp;
+	struct acpiphp_slot *slot;
+	acpi_status status;
+	acpi_handle handle = bridge->handle;
+
+	status = acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
+					    handle_hotplug_event_bridge);
+	if (ACPI_FAILURE(status))
+		err("failed to remove notify handler\n");
+
+	slot = bridge->slots;
+	while (slot) {
+		struct acpiphp_slot *next = slot->next;
+		list_for_each_safe (list, tmp, &slot->funcs) {
+			struct acpiphp_func *func;
+			func = list_entry(list, struct acpiphp_func, sibling);
+			status = acpi_remove_notify_handler(func->handle,
+						ACPI_SYSTEM_NOTIFY,
+						handle_hotplug_event_func);
+			if (ACPI_FAILURE(status))
+				err("failed to remove notify handler\n");
+			pci_dev_put(func->pci_dev);
+			list_del(list);
+			kfree(func);
+		}
+		kfree(slot);
+		slot = next;
+	}
+
+	pci_dev_put(bridge->pci_dev);
+	list_del(&bridge->list);
+	kfree(bridge);
+}
+
+static acpi_status
+cleanup_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv)
+{
+	struct acpiphp_bridge *bridge;
+
+	if (!(bridge = acpiphp_handle_to_bridge(handle)))
+		return AE_OK;
+	cleanup_bridge(bridge);
+	return AE_OK;
+}
 
 static void remove_bridge(acpi_handle handle)
 {
-	/* No-op for now .. */
+	struct acpiphp_bridge *bridge;
+
+	bridge = acpiphp_handle_to_bridge(handle);
+	if (bridge) {
+		cleanup_bridge(bridge);
+	} else {
+		/* clean-up p2p bridges under this host bridge */
+		acpi_walk_namespace(ACPI_TYPE_DEVICE, handle,
+				(u32)1, cleanup_p2p_bridge, NULL, NULL);
+	}
+}
+
+static struct pci_dev * get_apic_pci_info(acpi_handle handle)
+{
+	struct acpi_pci_id id;
+	struct pci_bus *bus;
+	struct pci_dev *dev;
+
+	if (ACPI_FAILURE(acpi_get_pci_id(handle, &id)))
+		return NULL;
+
+	bus = pci_find_bus(id.segment, id.bus);
+	if (!bus)
+		return NULL;
+
+	dev = pci_get_slot(bus, PCI_DEVFN(id.device, id.function));
+	if (!dev)
+		return NULL;
+
+	if ((dev->class != PCI_CLASS_SYSTEM_PIC_IOAPIC) &&
+	    (dev->class != PCI_CLASS_SYSTEM_PIC_IOXAPIC))
+	{
+		pci_dev_put(dev);
+		return NULL;
+	}
+
+	return dev;
+}
+
+static int get_gsi_base(acpi_handle handle, u32 *gsi_base)
+{
+	acpi_status status;
+	int result = -1;
+	unsigned long gsb;
+	struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
+	union acpi_object *obj;
+	void *table;
+
+	status = acpi_evaluate_integer(handle, "_GSB", NULL, &gsb);
+	if (ACPI_SUCCESS(status)) {
+		*gsi_base = (u32)gsb;
+		return 0;
+	}
+
+	status = acpi_evaluate_object(handle, "_MAT", NULL, &buffer);
+	if (ACPI_FAILURE(status) || !buffer.length || !buffer.pointer)
+		return -1;
+
+	obj = buffer.pointer;
+	if (obj->type != ACPI_TYPE_BUFFER)
+		goto out;
+
+	table = obj->buffer.pointer;
+	switch (((acpi_table_entry_header *)table)->type) {
+	case ACPI_MADT_IOSAPIC:
+		*gsi_base = ((struct acpi_table_iosapic *)table)->global_irq_base;
+		result = 0;
+		break;
+	case ACPI_MADT_IOAPIC:
+		*gsi_base = ((struct acpi_table_ioapic *)table)->global_irq_base;
+		result = 0;
+		break;
+	default:
+		break;
+	}
+ out:
+	acpi_os_free(buffer.pointer);
+	return result;
+}
+
+static acpi_status
+ioapic_add(acpi_handle handle, u32 lvl, void *context, void **rv)
+{
+	acpi_status status;
+	unsigned long sta;
+	acpi_handle tmp;
+	struct pci_dev *pdev;
+	u32 gsi_base;
+	u64 phys_addr;
+
+	/* Evaluate _STA if present */
+	status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
+	if (ACPI_SUCCESS(status) && sta != ACPI_STA_ALL)
+		return AE_CTRL_DEPTH;
+
+	/* Scan only PCI bus scope */
+	status = acpi_get_handle(handle, "_HID", &tmp);
+	if (ACPI_SUCCESS(status))
+		return AE_CTRL_DEPTH;
+
+	if (get_gsi_base(handle, &gsi_base))
+		return AE_OK;
+
+	pdev = get_apic_pci_info(handle);
+	if (!pdev)
+		return AE_OK;
+
+	if (pci_enable_device(pdev)) {
+		pci_dev_put(pdev);
+		return AE_OK;
+	}
+
+	pci_set_master(pdev);
+
+	if (pci_request_region(pdev, 0, "I/O APIC(acpiphp)")) {
+		pci_disable_device(pdev);
+		pci_dev_put(pdev);
+		return AE_OK;
+	}
+
+	phys_addr = pci_resource_start(pdev, 0);
+	if (acpi_register_ioapic(handle, phys_addr, gsi_base)) {
+		pci_release_region(pdev, 0);
+		pci_disable_device(pdev);
+		pci_dev_put(pdev);
+		return AE_OK;
+	}
+
+	return AE_OK;
 }
 
+static int acpiphp_configure_ioapics(acpi_handle handle)
+{
+	acpi_walk_namespace(ACPI_TYPE_DEVICE, handle,
+			    ACPI_UINT32_MAX, ioapic_add, NULL, NULL);
+	return 0;
+}
 
 static int power_on_slot(struct acpiphp_slot *slot)
 {
@@ -719,8 +718,6 @@ static int power_off_slot(struct acpiphp_slot *slot)
 	acpi_status status;
 	struct acpiphp_func *func;
 	struct list_head *l;
-	struct acpi_object_list arg_list;
-	union acpi_object arg;
 
 	int retval = 0;
 
@@ -731,7 +728,7 @@ static int power_off_slot(struct acpiphp_slot *slot)
 	list_for_each (l, &slot->funcs) {
 		func = list_entry(l, struct acpiphp_func, sibling);
 
-		if (func->pci_dev && (func->flags & FUNC_HAS_PS3)) {
+		if (func->flags & FUNC_HAS_PS3) {
 			status = acpi_evaluate_object(func->handle, "_PS3", NULL, NULL);
 			if (ACPI_FAILURE(status)) {
 				warn("%s: _PS3 failed\n", __FUNCTION__);
@@ -742,27 +739,6 @@ static int power_off_slot(struct acpiphp_slot *slot)
 		}
 	}
 
-	list_for_each (l, &slot->funcs) {
-		func = list_entry(l, struct acpiphp_func, sibling);
-
-		/* We don't want to call _EJ0 on non-existing functions. */
-		if (func->pci_dev && (func->flags & FUNC_HAS_EJ0)) {
-			/* _EJ0 method take one argument */
-			arg_list.count = 1;
-			arg_list.pointer = &arg;
-			arg.type = ACPI_TYPE_INTEGER;
-			arg.integer.value = 1;
-
-			status = acpi_evaluate_object(func->handle, "_EJ0", &arg_list, NULL);
-			if (ACPI_FAILURE(status)) {
-				warn("%s: _EJ0 failed\n", __FUNCTION__);
-				retval = -1;
-				goto err_exit;
-			} else
-				break;
-		}
-	}
-
 	/* TBD: evaluate _STA to check if the slot is disabled */
 
 	slot->flags &= (~SLOT_POWEREDON);
@@ -782,70 +758,56 @@ static int power_off_slot(struct acpiphp_slot *slot)
  */
 static int enable_device(struct acpiphp_slot *slot)
 {
-	u8 bus;
 	struct pci_dev *dev;
-	struct pci_bus *child;
+	struct pci_bus *bus = slot->bridge->pci_bus;
 	struct list_head *l;
 	struct acpiphp_func *func;
 	int retval = 0;
-	int num;
+	int num, max, pass;
 
 	if (slot->flags & SLOT_ENABLED)
 		goto err_exit;
 
 	/* sanity check: dev should be NULL when hot-plugged in */
-	dev = pci_find_slot(slot->bridge->bus, PCI_DEVFN(slot->device, 0));
+	dev = pci_get_slot(bus, PCI_DEVFN(slot->device, 0));
 	if (dev) {
 		/* This case shouldn't happen */
 		err("pci_dev structure already exists.\n");
+		pci_dev_put(dev);
 		retval = -1;
 		goto err_exit;
 	}
 
-	/* allocate resources to device */
-	retval = acpiphp_configure_slot(slot);
-	if (retval)
-		goto err_exit;
-
-	/* returned `dev' is the *first function* only! */
-	num = pci_scan_slot(slot->bridge->pci_bus, PCI_DEVFN(slot->device, 0));
-	if (num)
-		pci_bus_add_devices(slot->bridge->pci_bus);
-	dev = pci_find_slot(slot->bridge->bus, PCI_DEVFN(slot->device, 0));
-
-	if (!dev) {
+	num = pci_scan_slot(bus, PCI_DEVFN(slot->device, 0));
+	if (num == 0) {
 		err("No new device found\n");
 		retval = -1;
 		goto err_exit;
 	}
 
-	if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
-		pci_read_config_byte(dev, PCI_SECONDARY_BUS, &bus);
-		child = (struct pci_bus*) pci_add_new_bus(dev->bus, dev, bus);
-		pci_do_scan_bus(child);
+	max = bus->secondary;
+	for (pass = 0; pass < 2; pass++) {
+		list_for_each_entry(dev, &bus->devices, bus_list) {
+			if (PCI_SLOT(dev->devfn) != slot->device)
+				continue;
+			if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
+			    dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
+				max = pci_scan_bridge(bus, dev, max, pass);
+		}
 	}
 
+	pci_bus_assign_resources(bus);
+	pci_bus_add_devices(bus);
+
 	/* associate pci_dev to our representation */
 	list_for_each (l, &slot->funcs) {
 		func = list_entry(l, struct acpiphp_func, sibling);
-
-		func->pci_dev = pci_find_slot(slot->bridge->bus,
-					      PCI_DEVFN(slot->device,
+		func->pci_dev = pci_get_slot(bus, PCI_DEVFN(slot->device,
 							func->function));
-		if (!func->pci_dev)
-			continue;
-
-		/* configure device */
-		retval = acpiphp_configure_function(func);
-		if (retval)
-			goto err_exit;
 	}
 
 	slot->flags |= SLOT_ENABLED;
 
-	dbg("Available resources:\n");
-	acpiphp_dump_resource(slot->bridge);
-
  err_exit:
 	return retval;
 }
@@ -866,9 +828,12 @@ static int disable_device(struct acpiphp_slot *slot)
 
 	list_for_each (l, &slot->funcs) {
 		func = list_entry(l, struct acpiphp_func, sibling);
+		if (!func->pci_dev)
+			continue;
 
-		if (func->pci_dev)
-			acpiphp_unconfigure_function(func);
+		pci_remove_bus_device(func->pci_dev);
+		pci_dev_put(func->pci_dev);
+		func->pci_dev = NULL;
 	}
 
 	slot->flags &= (~SLOT_ENABLED);
@@ -920,6 +885,39 @@ static unsigned int get_slot_status(struct acpiphp_slot *slot)
 }
 
 /**
+ * acpiphp_eject_slot - physically eject the slot
+ */
+static int acpiphp_eject_slot(struct acpiphp_slot *slot)
+{
+	acpi_status status;
+	struct acpiphp_func *func;
+	struct list_head *l;
+	struct acpi_object_list arg_list;
+	union acpi_object arg;
+
+	list_for_each (l, &slot->funcs) {
+		func = list_entry(l, struct acpiphp_func, sibling);
+
+		/* We don't want to call _EJ0 on non-existing functions. */
+		if ((func->flags & FUNC_HAS_EJ0)) {
+			/* _EJ0 method take one argument */
+			arg_list.count = 1;
+			arg_list.pointer = &arg;
+			arg.type = ACPI_TYPE_INTEGER;
+			arg.integer.value = 1;
+
+			status = acpi_evaluate_object(func->handle, "_EJ0", &arg_list, NULL);
+			if (ACPI_FAILURE(status)) {
+				warn("%s: _EJ0 failed\n", __FUNCTION__);
+				return -1;
+			} else
+				break;
+		}
+	}
+	return 0;
+}
+
+/**
  * acpiphp_check_bridge - re-enumerate devices
  *
  * Iterate over all slots under this bridge and make sure that if a
@@ -942,6 +940,8 @@ static int acpiphp_check_bridge(struct acpiphp_bridge *bridge)
 			if (retval) {
 				err("Error occurred in disabling\n");
 				goto err_exit;
+			} else {
+				acpiphp_eject_slot(slot);
 			}
 			disabled++;
 		} else {
@@ -962,6 +962,144 @@ static int acpiphp_check_bridge(struct acpiphp_bridge *bridge)
 	return retval;
 }
 
+static void program_hpp(struct pci_dev *dev, struct acpiphp_bridge *bridge)
+{
+	u16 pci_cmd, pci_bctl;
+	struct pci_dev *cdev;
+
+	/* Program hpp values for this device */
+	if (!(dev->hdr_type == PCI_HEADER_TYPE_NORMAL ||
+			(dev->hdr_type == PCI_HEADER_TYPE_BRIDGE &&
+			(dev->class >> 8) == PCI_CLASS_BRIDGE_PCI)))
+		return;
+	pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE,
+			bridge->hpp.cache_line_size);
+	pci_write_config_byte(dev, PCI_LATENCY_TIMER,
+			bridge->hpp.latency_timer);
+	pci_read_config_word(dev, PCI_COMMAND, &pci_cmd);
+	if (bridge->hpp.enable_SERR)
+		pci_cmd |= PCI_COMMAND_SERR;
+	else
+		pci_cmd &= ~PCI_COMMAND_SERR;
+	if (bridge->hpp.enable_PERR)
+		pci_cmd |= PCI_COMMAND_PARITY;
+	else
+		pci_cmd &= ~PCI_COMMAND_PARITY;
+	pci_write_config_word(dev, PCI_COMMAND, pci_cmd);
+
+	/* Program bridge control value and child devices */
+	if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
+		pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER,
+				bridge->hpp.latency_timer);
+		pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &pci_bctl);
+		if (bridge->hpp.enable_SERR)
+			pci_bctl |= PCI_BRIDGE_CTL_SERR;
+		else
+			pci_bctl &= ~PCI_BRIDGE_CTL_SERR;
+		if (bridge->hpp.enable_PERR)
+			pci_bctl |= PCI_BRIDGE_CTL_PARITY;
+		else
+			pci_bctl &= ~PCI_BRIDGE_CTL_PARITY;
+		pci_write_config_word(dev, PCI_BRIDGE_CONTROL, pci_bctl);
+		if (dev->subordinate) {
+			list_for_each_entry(cdev, &dev->subordinate->devices,
+					bus_list)