[PATCH] Convert acpiphp to use generic resource code

From: Matthew Wilcox <matthew_at_wil.cx>
Date: 2005-01-20 05:51:20
This patch converts acpiphp to use the generic PCI resource assignment
code.  It's quite large, but most of it is deleting the acpiphp_pci and
acpiphp_res files.  It's tested on an hp Integrity rx8620 (which won't
work without this patch).  Testers with other hardware welcomed.

If you're testing on ia64, you'll probably need two other patches as well:

http://marc.theaimsgroup.com/?l=linux-ia64&m=110614534704894&w=2

and this one (already sent to Greg):

----
ia64 calls pci_claim_resource() from pcibios_fixup_bus(), which is
__devinit, so pci_claim_resource() needs to be __devinit too.

Signed-off-by: Matthew Wilcox <matthew@wil.cx>

Index: hotplug-2.6/drivers/pci/setup-res.c
===================================================================
RCS file: /var/cvs/linux-2.6/drivers/pci/setup-res.c,v
retrieving revision 1.9
diff -u -p -r1.9 setup-res.c
--- hotplug-2.6/drivers/pci/setup-res.c	29 Nov 2004 19:56:16 -0000	1.9
+++ hotplug-2.6/drivers/pci/setup-res.c	19 Jan 2005 14:41:34 -0000
@@ -90,7 +90,7 @@ pci_update_resource(struct pci_dev *dev,
 		new & ~PCI_REGION_FLAG_MASK));
 }
 
-int __init
+int __devinit
 pci_claim_resource(struct pci_dev *dev, int resource)
 {
 	struct resource *res = &dev->resource[resource];
----

Signed-off-by: Matthew Wilcox <matthew@wil.cx>

 Makefile       |    4 
 acpiphp.h      |   47 ---
 acpiphp_core.c |    9 
 acpiphp_glue.c |  455 ++++++++++---------------------------
 acpiphp_pci.c  |  449 ------------------------------------
 acpiphp_res.c  |  700 ---------------------------------------------------------
 6 files changed, 134 insertions(+), 1530 deletions(-)

Index: drivers/pci/hotplug/Makefile
===================================================================
RCS file: /var/cvs/linux-2.6/drivers/pci/hotplug/Makefile,v
retrieving revision 1.6
diff -u -p -r1.6 Makefile
--- drivers/pci/hotplug/Makefile	4 Dec 2004 07:02:43 -0000	1.6
+++ drivers/pci/hotplug/Makefile	19 Jan 2005 18:33:31 -0000
@@ -36,9 +36,7 @@ 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	\
Index: drivers/pci/hotplug/acpiphp.h
===================================================================
RCS file: /var/cvs/linux-2.6/drivers/pci/hotplug/acpiphp.h,v
retrieving revision 1.6
diff -u -p -r1.6 acpiphp.h
--- drivers/pci/hotplug/acpiphp.h	13 Sep 2004 15:23:21 -0000	1.6
+++ drivers/pci/hotplug/acpiphp.h	19 Jan 2005 18:33:31 -0000
@@ -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;
 };
 
 /**
@@ -242,25 +218,6 @@ extern u8 acpiphp_get_attention_status (
 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;
Index: drivers/pci/hotplug/acpiphp_core.c
===================================================================
RCS file: /var/cvs/linux-2.6/drivers/pci/hotplug/acpiphp_core.c,v
retrieving revision 1.6
diff -u -p -r1.6 acpiphp_core.c
--- drivers/pci/hotplug/acpiphp_core.c	13 Sep 2004 15:23:21 -0000	1.6
+++ drivers/pci/hotplug/acpiphp_core.c	19 Jan 2005 18:33:31 -0000
@@ -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 hot
 /**
  * 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)
 {
Index: drivers/pci/hotplug/acpiphp_glue.c
===================================================================
RCS file: /var/cvs/linux-2.6/drivers/pci/hotplug/acpiphp_glue.c,v
retrieving revision 1.12
diff -u -p -r1.12 acpiphp_glue.c
--- drivers/pci/hotplug/acpiphp_glue.c	29 Nov 2004 19:56:16 -0000	1.12
+++ drivers/pci/hotplug/acpiphp_glue.c	19 Jan 2005 18:33:31 -0000
@@ -4,6 +4,8 @@
  * 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
  *
  * All rights reserved.
  *
@@ -26,6 +28,16 @@
  *
  */
 
+/*
+ * 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 +190,18 @@ register_slot(acpi_handle handle, u32 lv
 
 		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 +236,6 @@ static int detect_ejectable_slots(acpi_h
 }
 
 
-/* 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)
 {
@@ -346,9 +299,6 @@ static void init_bridge_misc(struct acpi
 	/* 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);
@@ -364,16 +314,12 @@ static void init_bridge_misc(struct acpi
 	}
 
 	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 +330,19 @@ static void add_host_bridge(acpi_handle 
 
 	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 +354,22 @@ static void add_p2p_bridge(acpi_handle *
 
 	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 +379,10 @@ find_p2p_bridge(acpi_handle handle, u32 
 {
 	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 +397,19 @@ find_p2p_bridge(acpi_handle handle, u32 
 	device = (tmp >> 16) & 0xffff;
 	function = tmp & 0xffff;
 
-	dev = pci_find_slot(bus, PCI_DEVFN(device, function));
-
-	if (!dev)
-		return AE_OK;
+	dev = pci_get_slot(pci_bus, PCI_DEVFN(device, function));
 
-	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 +421,7 @@ 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 +451,22 @@ 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);
@@ -672,10 +474,59 @@ 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 remove_bridge(acpi_handle handle)
 {
-	/* No-op for now .. */
+	struct list_head *list, *tmp;
+	struct acpiphp_bridge *bridge;
+	struct acpiphp_slot *slot;
+	acpi_status status;
+
+	bridge = acpiphp_handle_to_bridge(handle);
+	if (!bridge) {
+		err("Could not find bridge for handle %p\n", handle);
+		return;
+	}
+
+	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);
 }
 
 
@@ -782,70 +633,56 @@ static int power_off_slot(struct acpiphp
  */
 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 +703,12 @@ static int disable_device(struct acpiphp
 
 	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);
@@ -1116,46 +956,6 @@ int __init acpiphp_glue_init(void)
  */
 void __exit acpiphp_glue_exit(void)
 {
-	struct list_head *l1, *l2, *n1, *n2;
-	struct acpiphp_bridge *bridge;
-	struct acpiphp_slot *slot, *next;
-	struct acpiphp_func *func;
-	acpi_status status;
-
-	list_for_each_safe (l1, n1, &bridge_list) {
-		bridge = (struct acpiphp_bridge *)l1;
-		slot = bridge->slots;
-		while (slot) {
-			next = slot->next;
-			list_for_each_safe (l2, n2, &slot->funcs) {
-				func = list_entry(l2, struct acpiphp_func, sibling);
-				acpiphp_free_resource(&func->io_head);
-				acpiphp_free_resource(&func->mem_head);
-				acpiphp_free_resource(&func->p_mem_head);
-				acpiphp_free_resource(&func->bus_head);
-				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");
-				kfree(func);
-			}
-			kfree(slot);
-			slot = next;
-		}
-		status = acpi_remove_notify_handler(bridge->handle, ACPI_SYSTEM_NOTIFY,
-						    handle_hotplug_event_bridge);
-		if (ACPI_FAILURE(status))
-			err("failed to remove notify handler\n");
-
-		acpiphp_free_resource(&bridge->io_head);
-		acpiphp_free_resource(&bridge->mem_head);
-		acpiphp_free_resource(&bridge->p_mem_head);
-		acpiphp_free_resource(&bridge->bus_head);
-
-		kfree(bridge);
-	}
-
 	acpi_pci_unregister_driver(&acpi_pci_hp_driver);
 }
 
@@ -1173,11 +973,14 @@ int __init acpiphp_get_num_slots(void)
 
 	list_for_each (node, &bridge_list) {
 		bridge = (struct acpiphp_bridge *)node;
-		dbg("Bus%d %dslot(s)\n", bridge->bus, bridge->nr_slots);
+		dbg("Bus %04x:%02x has %d slot%s\n",
+				pci_domain_nr(bridge->pci_bus),
+				bridge->pci_bus->number, bridge->nr_slots,
+				bridge->nr_slots == 1 ? "" : "s");
 		num_slots += bridge->nr_slots;
 	}
 
-	dbg("Total %dslots\n", num_slots);
+	dbg("Total %d slots\n", num_slots);
 	return num_slots;
 }
 
@@ -1274,13 +1077,6 @@ int acpiphp_disable_slot(struct acpiphp_
 	if (retval)
 		goto err_exit;
 
-	acpiphp_resource_sort_and_combine(&slot->bridge->io_head);
-	acpiphp_resource_sort_and_combine(&slot->bridge->mem_head);
-	acpiphp_resource_sort_and_combine(&slot->bridge->p_mem_head);
-	acpiphp_resource_sort_and_combine(&slot->bridge->bus_head);
-	dbg("Available resources:\n");
-	acpiphp_dump_resource(slot->bridge);
-
  err_exit:
 	up(&slot->crit_sect);
 	return retval;
@@ -1335,9 +1131,10 @@ u8 acpiphp_get_adapter_status(struct acp
 u32 acpiphp_get_address(struct acpiphp_slot *slot)
 {
 	u32 address;
+	struct pci_bus *pci_bus = slot->bridge->pci_bus;
 
-	address = ((slot->bridge->seg) << 16) |
-		  ((slot->bridge->bus) << 8) |
+	address = (pci_domain_nr(pci_bus) << 16) |
+		  (pci_bus->number << 8) |
 		  slot->device;
 
 	return address;
Index: drivers/pci/hotplug/acpiphp_pci.c
===================================================================
RCS file: drivers/pci/hotplug/acpiphp_pci.c
diff -N drivers/pci/hotplug/acpiphp_pci.c
--- drivers/pci/hotplug/acpiphp_pci.c	28 Apr 2004 19:12:37 -0000	1.6
+++ /dev/null	1 Jan 1970 00:00:00 -0000
@@ -1,449 +0,0 @@
-/*
- * ACPI PCI HotPlug PCI configuration space management
- *
- * Copyright (C) 1995,2001 Compaq Computer Corporation
- * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
- * Copyright (C) 2001,2002 IBM Corp.
- * Copyright (C) 2002 Takayoshi Kochi (t-kochi@bq.jp.nec.com)
- * Copyright (C) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com)
- * Copyright (C) 2002 NEC Corporation
- *
- * All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or (at
- * your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- * NON INFRINGEMENT.  See the GNU General Public License for more
- * details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * Send feedback to <t-kochi@bq.jp.nec.com>
- *
- */
-
-#include <linux/init.h>
-#include <linux/module.h>
-
-#include <linux/kernel.h>
-#include <linux/pci.h>
-#include <linux/acpi.h>
-#include "../pci.h"
-#include "pci_hotplug.h"
-#include "acpiphp.h"
-
-#define MY_NAME "acpiphp_pci"
-
-
-/* allocate mem/pmem/io resource to a new function */
-static int init_config_space (struct acpiphp_func *func)
-{
-	u32 bar, len;
-	u32 address[] = {
-		PCI_BASE_ADDRESS_0,
-		PCI_BASE_ADDRESS_1,
-		PCI_BASE_ADDRESS_2,
-		PCI_BASE_ADDRESS_3,
-		PCI_BASE_ADDRESS_4,
-		PCI_BASE_ADDRESS_5,
-		0
-	};
-	int count;
-	struct acpiphp_bridge *bridge;
-	struct pci_resource *res;
-	struct pci_bus *pbus;
-	int bus, device, function;
-	unsigned int devfn;
-	u16 tmp;
-
-	bridge = func->slot->bridge;
-	pbus = bridge->pci_bus;
-	bus = bridge->bus;
-	device = func->slot->device;
-	function = func->function;
-	devfn = PCI_DEVFN(device, function);
-
-	for (count = 0; address[count]; count++) {	/* for 6 BARs */
-		pci_bus_write_config_dword(pbus, devfn,
-					   address[count], 0xFFFFFFFF);
-		pci_bus_read_config_dword(pbus, devfn, address[count], &bar);
-
-		if (!bar)	/* This BAR is not implemented */
-			continue;
-
-		dbg("Device %02x.%02x BAR %d wants %x\n", device, function, count, bar);
-
-		if (bar & PCI_BASE_ADDRESS_SPACE_IO) {
-			/* This is IO */
-
-			len = bar & (PCI_BASE_ADDRESS_IO_MASK & 0xFFFF);
-			len = len & ~(len - 1);
-
-			dbg("len in IO %x, BAR %d\n", len, count);
-
-			spin_lock(&bridge->res_lock);
-			res = acpiphp_get_io_resource(&bridge->io_head, len);
-			spin_unlock(&bridge->res_lock);
-
-			if (!res) {
-				err("cannot allocate requested io for %02x:%02x.%d len %x\n",
-				    bus, device, function, len);
-				return -1;
-			}
-			pci_bus_write_config_dword(pbus, devfn,
-						   address[count],
-						   (u32)res->base);
-			res->next = func->io_head;
-			func->io_head = res;
-
-		} else {
-			/* This is Memory */
-			if (bar & PCI_BASE_ADDRESS_MEM_PREFETCH) {
-				/* pfmem */
-
-				len = bar & 0xFFFFFFF0;
-				len = ~len + 1;
-
-				dbg("len in PFMEM %x, BAR %d\n", len, count);
-
-				spin_lock(&bridge->res_lock);
-				res = acpiphp_get_resource(&bridge->p_mem_head, len);
-				spin_unlock(&bridge->res_lock);
-
-				if (!res) {
-					err("cannot allocate requested pfmem for %02x:%02x.%d len %x\n",
-					    bus, device, function, len);
-					return -1;
-				}
-
-				pci_bus_write_config_dword(pbus, devfn,
-							   address[count],
-							   (u32)res->base);
-
-				if (bar & PCI_BASE_ADDRESS_MEM_TYPE_64) {	/* takes up another dword */
-					dbg("inside the pfmem 64 case, count %d\n", count);
-					count += 1;
-					pci_bus_write_config_dword(pbus, devfn,
-								   address[count],
-								   (u32)(res->base >> 32));
-				}
-
-				res->next = func->p_mem_head;
-				func->p_mem_head = res;
-
-			} else {
-				/* regular memory */
-
-				len = bar & 0xFFFFFFF0;
-				len = ~len + 1;
-
-				dbg("len in MEM %x, BAR %d\n", len, count);
-
-				spin_lock(&bridge->res_lock);
-				res = acpiphp_get_resource(&bridge->mem_head, len);
-				spin_unlock(&bridge->res_lock);
-
-				if (!res) {
-					err("cannot allocate requested pfmem for %02x:%02x.%d len %x\n",
-					    bus, device, function, len);
-					return -1;
-				}
-
-				pci_bus_write_config_dword(pbus, devfn,
-							   address[count],
-							   (u32)res->base);
-
-				if (bar & PCI_BASE_ADDRESS_MEM_TYPE_64) {
-					/* takes up another dword */
-					dbg("inside mem 64 case, reg. mem, count %d\n", count);
-					count += 1;
-					pci_bus_write_config_dword(pbus, devfn,
-								   address[count],
-								   (u32)(res->base >> 32));
-				}
-
-				res->next = func->mem_head;
-				func->mem_head = res;
-
-			}
-		}
-	}
-
-	/* disable expansion rom */
-	pci_bus_write_config_dword(pbus, devfn, PCI_ROM_ADDRESS, 0x00000000);
-
-	/* set PCI parameters from _HPP */
-	pci_bus_write_config_byte(pbus, devfn, PCI_CACHE_LINE_SIZE,
-				  bridge->hpp.cache_line_size);
-	pci_bus_write_config_byte(pbus, devfn, PCI_LATENCY_TIMER,
-				  bridge->hpp.latency_timer);
-
-	pci_bus_read_config_word(pbus, devfn, PCI_COMMAND, &tmp);
-	if (bridge->hpp.enable_SERR)
-		tmp |= PCI_COMMAND_SERR;
-	if (bridge->hpp.enable_PERR)
-		tmp |= PCI_COMMAND_PARITY;
-	pci_bus_write_config_word(pbus, devfn, PCI_COMMAND, tmp);
-
-	return 0;
-}
-
-/* detect_used_resource - subtract resource under dev from bridge */
-static int detect_used_resource (struct acpiphp_bridge *bridge, struct pci_dev *dev)
-{
-	int count;
-
-	dbg("Device %s\n", pci_name(dev));
-
-	for (count = 0; count < DEVICE_COUNT_RESOURCE; count++) {
-		struct pci_resource *res;
-		struct pci_resource **head;
-		unsigned long base = dev->resource[count].start;
-		unsigned long len = dev->resource[count].end - base + 1;
-		unsigned long flags = dev->resource[count].flags;
-
-		if (!flags)
-			continue;
-
-		dbg("BAR[%d] 0x%lx - 0x%lx (0x%lx)\n", count, base,
-				base + len - 1, flags);
-
-		if (flags & IORESOURCE_IO) {
-			head = &bridge->io_head;
-		} else if (flags & IORESOURCE_PREFETCH) {
-			head = &bridge->p_mem_head;
-		} else {
-			head = &bridge->mem_head;
-		}
-
-		spin_lock(&bridge->res_lock);
-		res = acpiphp_get_resource_with_base(head, base, len);
-		spin_unlock(&bridge->res_lock);
-		if (res)
-			kfree(res);
-	}
-
-	return 0;
-}
-
-
-/**
- * acpiphp_detect_pci_resource - detect resources under bridge
- * @bridge: detect all resources already used under this bridge
- *
- * collect all resources already allocated for all devices under a bridge.
- */
-int acpiphp_detect_pci_resource (struct acpiphp_bridge *bridge)
-{
-	struct list_head *l;
-	struct pci_dev *dev;
-
-	list_for_each (l, &bridge->pci_bus->devices) {
-		dev = pci_dev_b(l);
-		detect_used_resource(bridge, dev);
-	}
-
-	return 0;
-}
-
-
-/**
- * acpiphp_init_slot_resource - gather resource usage information of a slot
- * @slot: ACPI slot object to be checked, should have valid pci_dev member
- *
- * TBD: PCI-to-PCI bridge case
- *      use pci_dev->resource[]
- */
-int acpiphp_init_func_resource (struct acpiphp_func *func)
-{
-	u64 base;
-	u32 bar, len;
-	u32 address[] = {
-		PCI_BASE_ADDRESS_0,
-		PCI_BASE_ADDRESS_1,
-		PCI_BASE_ADDRESS_2,
-		PCI_BASE_ADDRESS_3,
-		PCI_BASE_ADDRESS_4,
-		PCI_BASE_ADDRESS_5,
-		0
-	};
-	int count;
-	struct pci_resource *res;
-	struct pci_dev *dev;
-
-	dev = func->pci_dev;
-	dbg("Hot-pluggable device %s\n", pci_name(dev));
-
-	for (count = 0; address[count]; count++) {	/* for 6 BARs */
-		pci_read_config_dword(dev, address[count], &bar);
-
-		if (!bar)	/* This BAR is not implemented */
-			continue;
-
-		pci_write_config_dword(dev, address[count], 0xFFFFFFFF);
-		pci_read_config_dword(dev, address[count], &len);
-
-		if (len & PCI_BASE_ADDRESS_SPACE_IO) {
-			/* This is IO */
-			base = bar & 0xFFFFFFFC;
-			len = len & (PCI_BASE_ADDRESS_IO_MASK & 0xFFFF);
-			len = len & ~(len - 1);
-
-			dbg("BAR[%d] %08x - %08x (IO)\n", count, (u32)base, (u32)base + len - 1);
-
-			res = acpiphp_make_resource(base, len);
-			if (!res)
-				goto no_memory;
-
-			res->next = func->io_head;
-			func->io_head = res;
-
-		} else {
-			/* This is Memory */
-			base = bar & 0xFFFFFFF0;
-			if (len & PCI_BASE_ADDRESS_MEM_PREFETCH) {
-				/* pfmem */
-
-				len &= 0xFFFFFFF0;
-				len = ~len + 1;
-
-				if (len & PCI_BASE_ADDRESS_MEM_TYPE_64) {	/* takes up another dword */
-					dbg("prefetch mem 64\n");
-					count += 1;
-				}
-				dbg("BAR[%d] %08x - %08x (PMEM)\n", count, (u32)base, (u32)base + len - 1);
-				res = acpiphp_make_resource(base, len);
-				if (!res)
-					goto no_memory;
-
-				res->next = func->p_mem_head;
-				func->p_mem_head = res;
-
-			} else {
-				/* regular memory */
-
-				len &= 0xFFFFFFF0;
-				len = ~len + 1;
-
-				if (len & PCI_BASE_ADDRESS_MEM_TYPE_64) {
-					/* takes up another dword */
-					dbg("mem 64\n");
-					count += 1;
-				}
-				dbg("BAR[%d] %08x - %08x (MEM)\n", count, (u32)base, (u32)base + len - 1);
-				res = acpiphp_make_resource(base, len);
-				if (!res)
-					goto no_memory;
-
-				res->next = func->mem_head;
-				func->mem_head = res;
-
-			}
-		}
-
-		pci_write_config_dword(dev, address[count], bar);
-	}
-#if 1
-	acpiphp_dump_func_resource(func);
-#endif
-
-	return 0;
-
- no_memory:
-	err("out of memory\n");
-	acpiphp_free_resource(&func->io_head);
-	acpiphp_free_resource(&func->mem_head);
-	acpiphp_free_resource(&func->p_mem_head);
-
-	return -1;
-}
-
-
-/**
- * acpiphp_configure_slot - allocate PCI resources
- * @slot: slot to be configured
- *
- * initializes a PCI functions on a device inserted
- * into the slot
- *
- */
-int acpiphp_configure_slot (struct acpiphp_slot *slot)
-{
-	struct acpiphp_func *func;
-	struct list_head *l;
-	u8 hdr;
-	u32 dvid;
-	int retval = 0;
-	int is_multi = 0;
-
-	pci_bus_read_config_byte(slot->bridge->pci_bus,
-				 PCI_DEVFN(slot->device, 0),
-				 PCI_HEADER_TYPE, &hdr);
-
-	if (hdr & 0x80)
-		is_multi = 1;
-
-	list_for_each (l, &slot->funcs) {
-		func = list_entry(l, struct acpiphp_func, sibling);
-		if (is_multi || func->function == 0) {
-			pci_bus_read_config_dword(slot->bridge->pci_bus,
-						  PCI_DEVFN(slot->device,
-							    func->function),
-						  PCI_VENDOR_ID, &dvid);
-			if (dvid != 0xffffffff) {
-				retval = init_config_space(func);
-				if (retval)
-					break;
-			}
-		}
-	}
-
-	return retval;
-}
-
-/**
- * acpiphp_configure_function - configure PCI function
- * @func: function to be configured
- *
- * initializes a PCI functions on a device inserted
- * into the slot
- *
- */
-int acpiphp_configure_function (struct acpiphp_func *func)
-{
-	/* all handled by the pci core now */
-	return 0;
-}
-
-/**
- * acpiphp_unconfigure_function - unconfigure PCI function
- * @func: function to be unconfigured
- *
- */
-void acpiphp_unconfigure_function (struct acpiphp_func *func)
-{
-	struct acpiphp_bridge *bridge;
-
-	/* if pci_dev is NULL, ignore it */
-	if (!func->pci_dev)
-		return;
-
-	pci_remove_bus_device(func->pci_dev);
-
-	/* free all resources */
-	bridge = func->slot->bridge;
-
-	spin_lock(&bridge->res_lock);
-	acpiphp_move_resource(&func->io_head, &bridge->io_head);
-	acpiphp_move_resource(&func->mem_head, &bridge->mem_head);
-	acpiphp_move_resource(&func->p_mem_head, &bridge->p_mem_head);
-	acpiphp_move_resource(&func->bus_head, &bridge->bus_head);
-	spin_unlock(&bridge->res_lock);
-}
Index: drivers/pci/hotplug/acpiphp_res.c
===================================================================
RCS file: drivers/pci/hotplug/acpiphp_res.c
diff -N drivers/pci/hotplug/acpiphp_res.c
--- drivers/pci/hotplug/acpiphp_res.c	23 May 2004 23:52:23 -0000	1.5
+++ /dev/null	1 Jan 1970 00:00:00 -0000
@@ -1,700 +0,0 @@
-/*
- * ACPI PCI HotPlug Utility functions
- *
- * Copyright (C) 1995,2001 Compaq Computer Corporation
- * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
- * Copyright (C) 2001 IBM Corp.
- * Copyright (C) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com)
- * Copyright (C) 2002 Takayoshi Kochi (t-kochi@bq.jp.nec.com)
- * Copyright (C) 2002 NEC Corporation
- *
- * All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or (at
- * your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- * NON INFRINGEMENT.  See the GNU General Public License for more
- * details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * Send feedback to <gregkh@us.ibm.com>, <t-kochi@bq.jp.nec.com>
- *
- */
-
-#include <linux/init.h>
-#include <linux/module.h>
-
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/proc_fs.h>
-#include <linux/sysctl.h>
-#include <linux/pci.h>
-#include <linux/smp.h>
-#include <linux/smp_lock.h>
-
-#include <linux/string.h>
-#include <linux/mm.h>
-#include <linux/errno.h>
-#include <linux/ioport.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/timer.h>
-
-#include <linux/ioctl.h>
-#include <linux/fcntl.h>
-
-#include <linux/list.h>
-
-#include "pci_hotplug.h"
-#include "acpiphp.h"
-
-#define MY_NAME "acpiphp_res"
-
-
-/*
- * sort_by_size - sort nodes by their length, smallest first
- */
-static int sort_by_size(struct pci_resource **head)
-{
-	struct pci_resource *current_res;
-	struct pci_resource *next_res;
-	int out_of_order = 1;
-
-	if (!(*head))
-		return 1;
-
-	if (!((*head)->next))
-		return 0;
-
-	while (out_of_order) {
-		out_of_order = 0;
-
-		/* Special case for swapping list head */
-		if (((*head)->next) &&
-		    ((*head)->length > (*head)->next->length)) {
-			out_of_order++;
-			current_res = *head;
-			*head = (*head)->next;
-			current_res->next = (*head)->next;
-			(*head)->next = current_res;
-		}
-
-		current_res = *head;
-
-		while (current_res->next && current_res->next->next) {
-			if (current_res->next->length > current_res->next->next->length) {
-				out_of_order++;
-				next_res = current_res->next;
-				current_res->next = current_res->next->next;
-				current_res = current_res->next;
-				next_res->next = current_res->next;
-				current_res->next = next_res;
-			} else
-				current_res = current_res->next;
-		}
-	}  /* End of out_of_order loop */
-
-	return 0;
-}
-
-#if 0
-/*
- * sort_by_max_size - sort nodes by their length, largest first
- */
-static int sort_by_max_size(struct pci_resource **head)
-{
-	struct pci_resource *current_res;
-	struct pci_resource *next_res;
-	int out_of_order = 1;
-
-	if (!(*head))
-		return 1;
-
-	if (!((*head)->next))
-		return 0;
-
-	while (out_of_order) {
-		out_of_order = 0;
-
-		/* Special case for swapping list head */
-		if (((*head)->next) &&
-		    ((*head)->length < (*head)->next->length)) {
-			out_of_order++;
-			current_res = *head;
-			*head = (*head)->next;
-			current_res->next = (*head)->next;
-			(*head)->next = current_res;
-		}
-
-		current_res = *head;
-
-		while (current_res->next && current_res->next->next) {
-			if (current_res->next->length < current_res->next->next->length) {
-				out_of_order++;
-				next_res = current_res->next;
-				current_res->next = current_res->next->next;
-				current_res = current_res->next;
-				next_res->next = current_res->next;
-				current_res->next = next_res;
-			} else
-				current_res = current_res->next;
-		}
-	}  /* End of out_of_order loop */
-
-	return 0;
-}
-#endif
-
-/**
- * get_io_resource - get resource for I/O ports
- *
- * this function sorts the resource list by size and then
- * returns the first node of "size" length that is not in the
- * ISA aliasing window.  If it finds a node larger than "size"
- * it will split it up.
- *
- * size must be a power of two.
- *
- * difference from get_resource is handling of ISA aliasing space.
- *
- */
-struct pci_resource *acpiphp_get_io_resource (struct pci_resource **head, u32 size)
-{
-	struct pci_resource *prevnode;
-	struct pci_resource *node;
-	struct pci_resource *split_node;
-	u64 temp_qword;
-
-	if (!(*head))
-		return NULL;
-
-	if (acpiphp_resource_sort_and_combine(head))
-		return NULL;
-
-	if (sort_by_size(head))
-		return NULL;
-
-	for (node = *head; node; node = node->next) {
-		if (node->length < size)
-			continue;
-
-		if (node->base & (size - 1)) {
-			/* this one isn't base aligned properly
-			   so we'll make a new entry and split it up */
-			temp_qword = (node->base | (size-1)) + 1;
-
-			/* Short circuit if adjusted size is too small */
-			if ((node->length - (temp_qword - node->base)) < size)
-				continue;
-
-			split_node = acpiphp_make_resource(node->base, temp_qword - node->base);
-
-			if (!split_node)
-				return NULL;
-
-			node->base = temp_qword;
-			node->length -= split_node->length;
-
-			/* Put it in the list */
-			split_node->next = node->next;
-			node->next = split_node;
-		} /* End of non-aligned base */
-
-		/* Don't need to check if too small since we already did */
-		if (node->length > size) {
-			/* this one is longer than we need
-			   so we'll make a new entry and split it up */
-			split_node = acpiphp_make_resource(node->base + size, node->length - size);
-
-			if (!split_node)
-				return NULL;
-
-			node->length = size;
-
-			/* Put it in the list */
-			split_node->next = node->next;
-			node->next = split_node;
-		}  /* End of too big on top end */
-
-		/* For IO make sure it's not in the ISA aliasing space */
-		if ((node->base & 0x300L) && !(node->base & 0xfffff000))
-			continue;
-
-		/* If we got here, then it is the right size
-		   Now take it out of the list */
-		if (*head == node) {
-			*head = node->next;
-		} else {
-			prevnode = *head;
-			while (prevnode->next != node)
-				prevnode = prevnode->next;
-
-			prevnode->next = node->next;
-		}
-		node->next = NULL;
-		/* Stop looping */
-		break;
-	}
-
-	return node;
-}
-
-
-#if 0
-/**
- * get_max_resource - get the largest resource
- *
- * Gets the largest node that is at least "size" big from the
- * list pointed to by head.  It aligns the node on top and bottom
- * to "size" alignment before returning it.
- */
-static struct pci_resource *acpiphp_get_max_resource (struct pci_resource **head, u32 size)
-{
-	struct pci_resource *max;
-	struct pci_resource *temp;
-	struct pci_resource *split_node;
-	u64 temp_qword;
-
-	if (!(*head))
-		return NULL;
-
-	if (acpiphp_resource_sort_and_combine(head))
-		return NULL;
-
-	if (sort_by_max_size(head))
-		return NULL;
-
-	for (max = *head;max; max = max->next) {
-
-		/* If not big enough we could probably just bail,
-		   instead we'll continue to the next. */
-		if (max->length < size)
-			continue;
-
-		if (max->base & (size - 1)) {
-			/* this one isn't base aligned properly
-			   so we'll make a new entry and split it up */
-			temp_qword = (max->base | (size-1)) + 1;
-
-			/* Short circuit if adjusted size is too small */
-			if ((max->length - (temp_qword - max->base)) < size)
-				continue;
-
-			split_node = acpiphp_make_resource(max->base, temp_qword - max->base);
-
-			if (!split_node)
-				return NULL;
-
-			max->base = temp_qword;
-			max->length -= split_node->length;
-
-			/* Put it next in the list */
-			split_node->next = max->next;
-			max->next = split_node;
-		}
-
-		if ((max->base + max->length) & (size - 1)) {
-			/* this one isn't end aligned properly at the top
-			   so we'll make a new entry and split it up */
-			temp_qword = ((max->base + max->length) & ~(size - 1));
-
-			split_node = acpiphp_make_resource(temp_qword,
-							   max->length + max->base - temp_qword);
-
-			if (!split_node)
-				return NULL;
-
-			max->length -= split_node->length;
-
-			/* Put it in the list */
-			split_node->next = max->next;
-			max->next = split_node;
-		}
-
-		/* Make sure it didn't shrink too much when we aligned it */
-		if (max->length < size)
-			continue;
-
-		/* Now take it out of the list */
-		temp = (struct pci_resource*) *head;
-		if (temp == max) {
-			*head = max->next;
-		} else {
-			while (temp && temp->next != max) {
-				temp = temp->next;
-			}
-
-			temp->next = max->next;
-		}
-
-		max->next = NULL;
-		return max;
-	}
-
-	/* If we get here, we couldn't find one */
-	return NULL;
-}
-#endif
-
-/**
- * get_resource - get resource (mem, pfmem)
- *
- * this function sorts the resource list by size and then
- * returns the first node of "size" length.  If it finds a node
- * larger than "size" it will split it up.
- *
- * size must be a power of two.
- *
- */
-struct pci_resource *acpiphp_get_resource (struct pci_resource **head, u32 size)
-{
-	struct pci_resource *prevnode;
-	struct pci_resource *node;
-	struct pci_resource *split_node;
-	u64 temp_qword;
-
-	if (!(*head))
-		return NULL;
-
-	if (acpiphp_resource_sort_and_combine(head))
-		return NULL;
-
-	if (sort_by_size(head))
-		return NULL;
-
-	for (node = *head; node; node = node->next) {
-		dbg("%s: req_size =%x node=%p, base=%x, length=%x\n",
-		    __FUNCTION__, size, node, (u32)node->base, node->length);
-		if (node->length < size)
-			continue;
-
-		if (node->base & (size - 1)) {
-			dbg("%s: not aligned\n", __FUNCTION__);
-			/* this one isn't base aligned properly
-			   so we'll make a new entry and split it up */
-			temp_qword = (node->base | (size-1)) + 1;
-
-			/* Short circuit if adjusted size is too small */
-			if ((node->length - (temp_qword - node->base)) < size)
-				continue;
-
-			split_node = acpiphp_make_resource(node->base, temp_qword - node->base);
-
-			if (!split_node)
-				return NULL;
-
-			node->base = temp_qword;
-			node->length -= split_node->length;
-
-			/* Put it in the list */
-			split_node->next = node->next;
-			node->next = split_node;
-		} /* End of non-aligned base */
-
-		/* Don't need to check if too small since we already did */
-		if (node->length > size) {
-			dbg("%s: too big\n", __FUNCTION__);
-			/* this one is longer than we need
-			   so we'll make a new entry and split it up */
-			split_node = acpiphp_make_resource(node->base + size, node->length - size);
-
-			if (!split_node)
-				return NULL;
-
-			node->length = size;
-
-			/* Put it in the list */
-			split_node->next = node->next;
-			node->next = split_node;
-		}  /* End of too big on top end */
-
-		dbg("%s: got one!!!\n", __FUNCTION__);
-		/* If we got here, then it is the right size
-		   Now take it out of the list */
-		if (*head == node) {
-			*head = node->next;
-		} else {
-			prevnode = *head;
-			while (prevnode->next != node)
-				prevnode = prevnode->next;
-
-			prevnode->next = node->next;
-		}
-		node->next = NULL;
-		/* Stop looping */
-		break;
-	}
-	return node;
-}
-
-/**
- * get_resource_with_base - get resource with specific base address
- *
- * this function
- * returns the first node of "size" length located at specified base address.
- * If it finds a node larger than "size" it will split it up.
- *
- * size must be a power of two.
- *
- */
-struct pci_resource *acpiphp_get_resource_with_base (struct pci_resource **head, u64 base, u32 size)
-{
-	struct pci_resource *prevnode;
-	struct pci_resource *node;
-	struct pci_resource *split_node;
-	u64 temp_qword;
-
-	if (!(*head))
-		return NULL;
-
-	if (acpiphp_resource_sort_and_combine(head))
-		return NULL;
-
-	for (node = *head; node; node = node->next) {
-		dbg(": 1st req_base=%x req_size =%x node=%p, base=%x, length=%x\n",
-		    (u32)base, size, node, (u32)node->base, node->length);
-		if (node->base > base)
-			continue;
-
-		if ((node->base + node->length) < (base + size))
-			continue;
-
-		if (node->base < base) {
-			dbg(": split 1\n");
-			/* this one isn't base aligned properly
-			   so we'll make a new entry and split it up */
-			temp_qword = base;
-
-			/* Short circuit if adjusted size is too small */
-			if ((node->length - (temp_qword - node->base)) < size)
-				continue;
-
-			split_node = acpiphp_make_resource(node->base, temp_qword - node->base);
-
-			if (!split_node)
-				return NULL;
-
-			node->base = temp_qword;
-			node->length -= split_node->length;
-
-			/* Put it in the list */
-			split_node->next = node->next;
-			node->next = split_node;
-		}
-
-		dbg(": 2nd req_base=%x req_size =%x node=%p, base=%x, length=%x\n",
-		    (u32)base, size, node, (u32)node->base, node->length);
-
-		/* Don't need to check if too small since we already did */
-		if (node->length > size) {
-			dbg(": split 2\n");
-			/* this one is longer than we need
-			   so we'll make a new entry and split it up */
-			split_node = acpiphp_make_resource(node->base + size, node->length - size);
-
-			if (!split_node)
-				return NULL;
-
-			node->length = size;
-
-			/* Put it in the list */
-			split_node->next = node->next;
-			node->next = split_node;
-		}  /* End of too big on top end */
-
-		dbg(": got one!!!\n");
-		/* If we got here, then it is the right size
-		   Now take it out of the list */
-		if (*head == node) {
-			*head = node->next;
-		} else {
-			prevnode = *head;
-			while (prevnode->next != node)
-				prevnode = prevnode->next;
-
-			prevnode->next = node->next;
-		}
-		node->next = NULL;
-		/* Stop looping */
-		break;
-	}
-	return node;
-}
-
-
-/**
- * acpiphp_resource_sort_and_combine
- *
- * Sorts all of the nodes in the list in ascending order by
- * their base addresses.  Also does garbage collection by
- * combining adjacent nodes.
- *
- * returns 0 if success
- */
-int acpiphp_resource_sort_and_combine (struct pci_resource **head)
-{
-	struct pci_resource *node1;
-	struct pci_resource *node2;
-	int out_of_order = 1;
-
-	if (!(*head))
-		return 1;
-
-	dbg("*head->next = %p\n",(*head)->next);
-
-	if (!(*head)->next)
-		return 0;	/* only one item on the list, already sorted! */
-
-	dbg("*head->base = 0x%x\n",(u32)(*head)->base);
-	dbg("*head->next->base = 0x%x\n", (u32)(*head)->next->base);
-	while (out_of_order) {
-		out_of_order = 0;
-
-		/* Special case for swapping list head */
-		if (((*head)->next) &&
-		    ((*head)->base > (*head)->next->base)) {
-			node1 = *head;
-			(*head) = (*head)->next;
-			node1->next = (*head)->next;
-			(*head)->next = node1;
-			out_of_order++;
-		}
-
-		node1 = (*head);
-
-		while (node1->next && node1->next->next) {
-			if (node1->next->base > node1->next->next->base) {
-				out_of_order++;
-				node2 = node1->next;
-				node1->next = node1->next->next;
-				node1 = node1->next;
-				node2->next = node1->next;
-				node1->next = node2;
-			} else
-				node1 = node1->next;
-		}
-	}  /* End of out_of_order loop */
-
-	node1 = *head;
-
-	while (node1 && node1->next) {
-		if ((node1->base + node1->length) == node1->next->base) {
-			/* Combine */
-			dbg("8..\n");
-			node1->length += node1->next->length;
-			node2 = node1->next;
-			node1->next = node1->next->next;
-			kfree(node2);
-		} else
-			node1 = node1->next;
-	}
-
-	return 0;
-}
-
-
-/**
- * acpiphp_make_resource - make resource structure
- * @base: base address of a resource
- * @length: length of a resource
- */
-struct pci_resource *acpiphp_make_resource (u64 base, u32 length)
-{
-	struct pci_resource *res;
-
-	res = kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
-	if (res) {
-		memset(res, 0, sizeof(struct pci_resource));
-		res->base = base;
-		res->length = length;
-	}
-
-	return res;
-}
-
-
-/**
- * acpiphp_move_resource - move linked resources from one to another
- * @from: head of linked resource list
- * @to: head of linked resource list
- */
-void acpiphp_move_resource (struct pci_resource **from, struct pci_resource **to)
-{
-	struct pci_resource *tmp;
-
-	while (*from) {
-		tmp = (*from)->next;
-		(*from)->next = *to;
-		*to = *from;
-		*from = tmp;
-	}
-
-	/* *from = NULL is guaranteed */
-}
-
-
-/**
- * acpiphp_free_resource - free all linked resources
- * @res: head of linked resource list
- */
-void acpiphp_free_resource (struct pci_resource **res)
-{
-	struct pci_resource *tmp;
-
-	while (*res) {
-		tmp = (*res)->next;
-		kfree(*res);
-		*res = tmp;
-	}
-
-	/* *res = NULL is guaranteed */
-}
-
-
-/* debug support functions;  will go away sometime :) */
-static void dump_resource(struct pci_resource *head)
-{
-	struct pci_resource *p;
-	int cnt;
-
-	p = head;
-	cnt = 0;
-
-	while (p) {
-		dbg("[%02d] %08x - %08x\n",
-		    cnt++, (u32)p->base, (u32)p->base + p->length - 1);
-		p = p->next;
-	}
-}
-
-void acpiphp_dump_resource(struct acpiphp_bridge *bridge)
-{
-	dbg("I/O resource:\n");
-	dump_resource(bridge->io_head);
-	dbg("MEM resource:\n");
-	dump_resource(bridge->mem_head);
-	dbg("PMEM resource:\n");
-	dump_resource(bridge->p_mem_head);
-	dbg("BUS resource:\n");
-	dump_resource(bridge->bus_head);
-}
-
-void acpiphp_dump_func_resource(struct acpiphp_func *func)
-{
-	dbg("I/O resource:\n");
-	dump_resource(func->io_head);
-	dbg("MEM resource:\n");
-	dump_resource(func->mem_head);
-	dbg("PMEM resource:\n");
-	dump_resource(func->p_mem_head);
-	dbg("BUS resource:\n");
-	dump_resource(func->bus_head);
-}
-- 
"Next the statesmen will invent cheap lies, putting the blame upon 
the nation that is attacked, and every man will be glad of those
conscience-soothing falsities, and will diligently study them, and refuse
to examine any refutations of them; and thus he will by and by convince 
himself that the war is just, and will thank God for the better sleep 
he enjoys after this process of grotesque self-deception." -- Mark Twain
-
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Received on Wed Jan 19 13:59:26 2005

This archive was generated by hypermail 2.1.8 : 2005-08-02 09:20:34 EST