patch-2.4.20 linux-2.4.20/drivers/hotplug/acpiphp_glue.c

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diff -urN linux-2.4.19/drivers/hotplug/acpiphp_glue.c linux-2.4.20/drivers/hotplug/acpiphp_glue.c
@@ -0,0 +1,1514 @@
+/*
+ * ACPI PCI HotPlug glue functions to ACPI CA subsystem
+ *
+ * Copyright (c) 2002 Takayoshi Kochi (t-kouchi@cq.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-kouchi@cq.jp.nec.com>
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/smp_lock.h>
+#include <linux/init.h>
+#include <asm/semaphore.h>
+
+#include "pci_hotplug.h"
+#include "acpiphp.h"
+
+static LIST_HEAD(bridge_list);
+
+static int debug = 1;			/* XXX set 0 after debug */
+#define MY_NAME "acpiphp_glue"
+
+static void handle_hotplug_event_bridge (acpi_handle, u32, void *);
+static void handle_hotplug_event_func (acpi_handle, u32, void *);
+static struct pci_ops *default_ops;
+
+/*
+ * initialization & terminatation routines
+ */
+
+/**
+ * is_ejectable - determine if a slot is ejectable
+ * @handle: handle to acpi namespace
+ *
+ * Ejectable slot should satisfy at least these conditions:
+ *
+ *  1. has _ADR method
+ *  2. has _EJ0 method
+ *
+ * optionally
+ *
+ *  1. has _STA method
+ *  2. has _PS0 method
+ *  3. has _PS3 method
+ *  4. ..
+ *
+ */
+static int is_ejectable (acpi_handle handle)
+{
+	acpi_status status;
+	acpi_handle tmp;
+
+	status = acpi_get_handle(handle, "_ADR", &tmp);
+	if (ACPI_FAILURE(status)) {
+		return 0;
+	}
+
+	status = acpi_get_handle(handle, "_EJ0", &tmp);
+	if (ACPI_FAILURE(status)) {
+		return 0;
+	}
+
+	return 1;
+}
+
+
+/* callback routine to check the existence of ejectable slots */
+static acpi_status
+is_ejectable_slot (acpi_handle handle, u32 lvl,	void *context, void **rv)
+{
+	acpi_status status;
+	acpi_handle tmp;
+	int *count = (int *)context;
+
+	if (is_ejectable(handle)) {
+		(*count)++;
+		/* only one ejectable slot is enough */
+		return AE_CTRL_TERMINATE;
+	} else {
+		return AE_OK;
+	}
+}
+
+
+/* callback routine to register each ACPI PCI slot object */
+static acpi_status
+register_slot (acpi_handle handle, u32 lvl, void *context, void **rv)
+{
+	struct acpiphp_bridge *bridge = (struct acpiphp_bridge *)context;
+	struct acpiphp_slot *slot;
+	struct acpiphp_func *newfunc;
+	acpi_handle tmp;
+	acpi_status status = AE_OK;
+	unsigned long adr, sun;
+	int device, function;
+	static int num_slots = 0;	/* XXX if we support I/O node hotplug... */
+
+	status = acpi_evaluate_integer(handle, "_ADR", NULL, &adr);
+
+	if (ACPI_FAILURE(status))
+		return AE_OK;
+
+	status = acpi_get_handle(handle, "_EJ0", &tmp);
+
+	if (ACPI_FAILURE(status))
+		return AE_OK;
+
+	device = (adr >> 16) & 0xffff;
+	function = adr & 0xffff;
+
+	newfunc = kmalloc(sizeof(struct acpiphp_func), GFP_KERNEL);
+	if (!newfunc)
+		return AE_NO_MEMORY;
+	memset(newfunc, 0, sizeof(struct acpiphp_func));
+
+	INIT_LIST_HEAD(&newfunc->sibling);
+	newfunc->handle = handle;
+	newfunc->function = function;
+	newfunc->flags = FUNC_HAS_EJ0;
+
+	if (ACPI_SUCCESS(acpi_get_handle(handle, "_STA", &tmp)))
+		newfunc->flags |= FUNC_HAS_STA;
+
+	if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS0", &tmp)))
+		newfunc->flags |= FUNC_HAS_PS0;
+
+	if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS3", &tmp)))
+		newfunc->flags |= FUNC_HAS_PS3;
+
+	status = acpi_evaluate_integer(handle, "_SUN", NULL, &sun);
+	if (ACPI_FAILURE(status))
+		sun = -1;
+
+	/* search for objects that share the same slot */
+	for (slot = bridge->slots; slot; slot = slot->next)
+		if (slot->device == device) {
+			if (slot->sun != sun)
+				warn("sibling found, but _SUN doesn't match!");
+			break;
+		}
+
+	if (!slot) {
+		slot = kmalloc(sizeof(struct acpiphp_slot), GFP_KERNEL);
+		if (!slot) {
+			kfree(newfunc);
+			return AE_NO_MEMORY;
+		}
+
+		memset(slot, 0, sizeof(struct acpiphp_slot));
+		slot->bridge = bridge;
+		slot->id = num_slots++;
+		slot->device = device;
+		slot->sun = sun;
+		INIT_LIST_HEAD(&slot->funcs);
+		init_MUTEX(&slot->crit_sect);
+
+		slot->next = bridge->slots;
+		bridge->slots = slot;
+
+		bridge->nr_slots++;
+
+		dbg("found ACPI PCI Hotplug slot at PCI %02x:%02x Slot:%d",
+		    slot->bridge->bus, slot->device, slot->sun);
+	}
+
+	newfunc->slot = slot;
+	list_add_tail(&newfunc->sibling, &slot->funcs);
+
+	/* associate corresponding pci_dev */
+	newfunc->pci_dev = pci_find_slot(bridge->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);
+	}
+
+	/* install notify handler */
+	status = acpi_install_notify_handler(handle,
+					     ACPI_SYSTEM_NOTIFY,
+					     handle_hotplug_event_func,
+					     newfunc);
+
+	if (ACPI_FAILURE(status)) {
+		err("failed to register interrupt notify handler");
+		return status;
+	}
+
+	return AE_OK;
+}
+
+
+/* see if it's worth looking at this bridge */
+static int detect_ejectable_slots (acpi_handle *bridge_handle)
+{
+	acpi_status status;
+	int count;
+
+	count = 0;
+
+	/* only check slots defined directly below bridge object */
+	status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge_handle, (u32)1,
+				     is_ejectable_slot, (void *)&count, NULL);
+
+	return count;
+}
+
+
+/* decode ACPI _CRS data and convert into our internal resource list
+ * TBD: _TRA, etc.
+ */
+static void
+decode_acpi_resource (acpi_resource *resource, struct acpiphp_bridge *bridge)
+{
+	acpi_resource_address16 *address16_data;
+	acpi_resource_address32 *address32_data;
+	acpi_resource_address64 *address64_data;
+	struct pci_resource *res;
+
+	u32 resource_type, producer_consumer, address_length;
+	u64 min_address_range, max_address_range;
+	u16 cache_attribute = 0;
+
+	int done = 0, found;
+
+	/* shut up gcc */
+	resource_type = producer_consumer = address_length = 0;
+	min_address_range = max_address_range = 0;
+
+	while (!done) {
+		found = 0;
+
+		switch (resource->id) {
+		case ACPI_RSTYPE_ADDRESS16:
+			address16_data = (acpi_resource_address16 *)&resource->data;
+			resource_type = address16_data->resource_type;
+			producer_consumer = address16_data->producer_consumer;
+			min_address_range = address16_data->min_address_range;
+			max_address_range = address16_data->max_address_range;
+			address_length = address16_data->address_length;
+			if (resource_type == ACPI_MEMORY_RANGE)
+				cache_attribute = address16_data->attribute.memory.cache_attribute;
+			found = 1;
+			break;
+
+		case ACPI_RSTYPE_ADDRESS32:
+			address32_data = (acpi_resource_address32 *)&resource->data;
+			resource_type = address32_data->resource_type;
+			producer_consumer = address32_data->producer_consumer;
+			min_address_range = address32_data->min_address_range;
+			max_address_range = address32_data->max_address_range;
+			address_length = address32_data->address_length;
+			if (resource_type == ACPI_MEMORY_RANGE)
+				cache_attribute = address32_data->attribute.memory.cache_attribute;
+			found = 1;
+			break;
+
+		case ACPI_RSTYPE_ADDRESS64:
+			address64_data = (acpi_resource_address64 *)&resource->data;
+			resource_type = address64_data->resource_type;
+			producer_consumer = address64_data->producer_consumer;
+			min_address_range = address64_data->min_address_range;
+			max_address_range = address64_data->max_address_range;
+			address_length = address64_data->address_length;
+			if (resource_type == ACPI_MEMORY_RANGE)
+				cache_attribute = address64_data->attribute.memory.cache_attribute;
+			found = 1;
+			break;
+
+		case ACPI_RSTYPE_END_TAG:
+			done = 1;
+			break;
+
+		default:
+			/* ignore */
+			break;
+		}
+
+		resource = (acpi_resource *)((char*)resource + resource->length);
+
+		if (found && producer_consumer == ACPI_PRODUCER && address_length > 0) {
+			switch (resource_type) {
+			case ACPI_MEMORY_RANGE:
+				if (cache_attribute == ACPI_PREFETCHABLE_MEMORY) {
+					dbg("resource type: prefetchable memory 0x%x - 0x%x", (u32)min_address_range, (u32)max_address_range);
+					res = acpiphp_make_resource(min_address_range,
+							    address_length);
+					if (!res) {
+						err("out of memory");
+						return;
+					}
+					res->next = bridge->p_mem_head;
+					bridge->p_mem_head = res;
+				} else {
+					dbg("resource type: memory 0x%x - 0x%x", (u32)min_address_range, (u32)max_address_range);
+					res = acpiphp_make_resource(min_address_range,
+							    address_length);
+					if (!res) {
+						err("out of memory");
+						return;
+					}
+					res->next = bridge->mem_head;
+					bridge->mem_head = res;
+				}
+				break;
+			case ACPI_IO_RANGE:
+				dbg("resource type: io 0x%x - 0x%x", (u32)min_address_range, (u32)max_address_range);
+				res = acpiphp_make_resource(min_address_range,
+						    address_length);
+				if (!res) {
+					err("out of memory");
+					return;
+				}
+				res->next = bridge->io_head;
+				bridge->io_head = res;
+				break;
+			case ACPI_BUS_NUMBER_RANGE:
+				dbg("resource type: bus number %d - %d", (u32)min_address_range, (u32)max_address_range);
+				res = acpiphp_make_resource(min_address_range,
+						    address_length);
+				if (!res) {
+					err("out of memory");
+					return;
+				}
+				res->next = bridge->bus_head;
+				bridge->bus_head = res;
+				break;
+			default:
+				/* invalid type */
+				break;
+			}
+		}
+	}
+
+	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);
+#if 1
+	info("ACPI _CRS resource:");
+	acpiphp_dump_resource(bridge);
+#endif
+}
+
+
+/* find pci_bus structure associated to specific bus number */
+static struct pci_bus *find_pci_bus(const struct list_head *list, int bus)
+{
+	const struct list_head *l;
+
+	list_for_each(l, list) {
+		struct pci_bus *b = pci_bus_b(l);
+		if (b->number == bus)
+			return b;
+
+		if (!list_empty(&b->children)) {
+			/* XXX recursive call */
+			b = find_pci_bus(&b->children, bus);
+
+			if (b)
+				return b;
+		}
+	}
+
+	return 0;
+}
+
+
+/* decode ACPI 2.0 _HPP hot plug parameters */
+static void decode_hpp(struct acpiphp_bridge *bridge)
+{
+	acpi_status status;
+#if ACPI_CA_VERSION < 0x20020201
+	acpi_buffer buffer;
+#else
+	acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
+#endif
+	acpi_object *package;
+	int i;
+
+	/* default numbers */
+	bridge->hpp.cache_line_size = 0x10;
+	bridge->hpp.latency_timer = 0x40;
+	bridge->hpp.enable_SERR = 0;
+	bridge->hpp.enable_PERR = 0;
+
+#if ACPI_CA_VERSION < 0x20020201
+	buffer.length = 0;
+	buffer.pointer = NULL;
+
+	status = acpi_evaluate_object(bridge->handle, "_HPP", NULL, &buffer);
+
+	if (status == AE_BUFFER_OVERFLOW) {
+		buffer.pointer = kmalloc(buffer.length, GFP_KERNEL);
+		if (!buffer.pointer)
+			return;
+		status = acpi_evaluate_object(bridge->handle, "_HPP", NULL, &buffer);
+	}
+#else
+	status = acpi_evaluate_object(bridge->handle, "_HPP", NULL, &buffer);
+#endif
+
+	if (ACPI_FAILURE(status)) {
+		dbg("_HPP evaluation failed");
+		return;
+	}
+
+	package = (acpi_object *) buffer.pointer;
+
+	if (!package || package->type != ACPI_TYPE_PACKAGE ||
+	    package->package.count != 4 || !package->package.elements) {
+		err("invalid _HPP object; ignoring");
+		goto err_exit;
+	}
+
+	for (i = 0; i < 4; i++) {
+		if (package->package.elements[i].type != ACPI_TYPE_INTEGER) {
+			err("invalid _HPP parameter type; ignoring");
+			goto err_exit;
+		}
+	}
+
+	bridge->hpp.cache_line_size = package->package.elements[0].integer.value;
+	bridge->hpp.latency_timer = package->package.elements[1].integer.value;
+	bridge->hpp.enable_SERR = package->package.elements[2].integer.value;
+	bridge->hpp.enable_PERR = package->package.elements[3].integer.value;
+
+	dbg("_HPP parameter = (%02x, %02x, %02x, %02x)",
+	    bridge->hpp.cache_line_size,
+	    bridge->hpp.latency_timer,
+	    bridge->hpp.enable_SERR,
+	    bridge->hpp.enable_PERR);
+
+	bridge->flags |= BRIDGE_HAS_HPP;
+
+ err_exit:
+	kfree(buffer.pointer);
+}
+
+
+/* initialize miscellaneous stuff for both root and PCI-to-PCI bridge */
+static void init_bridge_misc (struct acpiphp_bridge *bridge)
+{
+	acpi_status status;
+
+	/* 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,
+					     ACPI_SYSTEM_NOTIFY,
+					     handle_hotplug_event_bridge,
+					     bridge);
+
+	if (ACPI_FAILURE(status)) {
+		err("failed to register interrupt notify handler");
+	}
+
+	list_add(&bridge->list, &bridge_list);
+
+#if 1
+	dbg("Bridge resource:");
+	acpiphp_dump_resource(bridge);
+#endif
+}
+
+
+/* allocate and initialize host bridge data structure */
+static void add_host_bridge (acpi_handle *handle, int seg, int bus)
+{
+	acpi_status status;
+#if ACPI_CA_VERSION < 0x20020201
+	acpi_buffer buffer;
+#else
+	acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
+#endif
+	struct acpiphp_bridge *bridge;
+
+	bridge = kmalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL);
+	if (bridge == NULL)
+		return;
+
+	memset(bridge, 0, sizeof(struct acpiphp_bridge));
+
+	bridge->type = BRIDGE_TYPE_HOST;
+	bridge->handle = handle;
+	bridge->seg = seg;
+	bridge->bus = bus;
+
+	bridge->pci_bus = find_pci_bus(&pci_root_buses, bus);
+	bridge->pci_ops = bridge->pci_bus->ops;
+
+	bridge->res_lock = SPIN_LOCK_UNLOCKED;
+
+	/* to be overridden when we decode _CRS	*/
+	bridge->sub = bridge->bus;
+
+	/* decode resources */
+
+#if ACPI_CA_VERSION < 0x20020201
+	buffer.length = 0;
+	buffer.pointer = NULL;
+
+	status = acpi_get_current_resources(handle, &buffer);
+
+	if (status == AE_BUFFER_OVERFLOW) {
+		buffer.pointer = kmalloc(buffer.length, GFP_KERNEL);
+		if (!buffer.pointer)
+			return;
+		status = acpi_get_current_resources(handle, &buffer);
+	}
+#else
+	status = acpi_get_current_resources(handle, &buffer);
+#endif
+
+	if (ACPI_FAILURE(status)) {
+		err("failed to decode bridge resources");
+		kfree(bridge);
+		return;
+	}
+
+	decode_acpi_resource(buffer.pointer, bridge);
+	kfree(buffer.pointer);
+
+	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)
+{
+	acpi_status status;
+	struct acpiphp_bridge *bridge;
+	u8 tmp8;
+	u16 tmp16;
+	u32 tmp;
+	u64 base64, limit64;
+	u32 base, limit, base32u, limit32u;
+
+	bridge = kmalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL);
+	if (bridge == NULL) {
+		err("out of memory");
+		return;
+	}
+
+	memset(bridge, 0, sizeof(struct acpiphp_bridge));
+
+	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");
+		kfree(bridge);
+		return;
+	}
+
+	bridge->pci_bus = bridge->pci_dev->subordinate;
+	if (!bridge->pci_bus) {
+		err("This is not a PCI-to-PCI bridge!");
+		kfree(bridge);
+		return;
+	}
+	bridge->pci_ops = bridge->pci_bus->ops;
+
+	bridge->res_lock = SPIN_LOCK_UNLOCKED;
+
+	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");
+			return;
+		}
+		dbg("16bit I/O range: %04x-%04x",
+		    (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");
+			return;
+		}
+		dbg("32bit I/O range: %08x-%08x",
+		    (u32)bridge->io_head->base,
+		    (u32)(bridge->io_head->base + bridge->io_head->length - 1));
+		break;
+	case 0x0f:
+		dbg("I/O space unsupported");
+		break;
+	default:
+		warn("Unknown I/O range type");
+	}
+
+	/* 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");
+		return;
+	}
+	dbg("32bit Memory range: %08x-%08x",
+	    (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");
+			return;
+		}
+		dbg("32bit Prefetchable memory range: %08x-%08x",
+		    (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");
+			return;
+		}
+		dbg("64bit Prefetchable memory range: %08x%08x-%08x%08x",
+		    (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");
+	}
+
+	init_bridge_misc(bridge);
+}
+
+
+/* callback routine to find P2P bridges */
+static acpi_status
+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;
+	struct pci_dev *dev;
+	u32 val;
+
+	/* get PCI address */
+	seg = (*segbus >> 8) & 0xff;
+	bus = *segbus & 0xff;
+
+	status = acpi_get_handle(handle, "_ADR", &dummy_handle);
+	if (ACPI_FAILURE(status))
+		return AE_OK;		/* continue */
+
+	status = acpi_evaluate_integer(handle, "_ADR", NULL, &tmp);
+	if (ACPI_FAILURE(status)) {
+		dbg("%s: _ADR evaluation failure", __FUNCTION__);
+		return AE_OK;
+	}
+
+	device = (tmp >> 16) & 0xffff;
+	function = tmp & 0xffff;
+
+	dev = pci_find_slot(bus, PCI_DEVFN(device, function));
+
+	if (!dev)
+		return AE_OK;
+
+	if (!dev->subordinate)
+		return AE_OK;
+
+	/* check if this bridge has ejectable slots */
+	if (detect_ejectable_slots(handle) > 0) {
+		dbg("found PCI-to-PCI bridge at PCI %02x:%02x.%d", bus, device, function);
+		add_p2p_bridge(handle, seg, bus, device, function);
+	}
+
+	return AE_OK;
+}
+
+
+/* find hot-pluggable slots, and then find P2P bridge */
+static int add_bridges (acpi_handle *handle)
+{
+	acpi_status status;
+	unsigned long tmp;
+	int seg, bus;
+	acpi_handle dummy_handle;
+	int sta = -1;
+
+	/* if the bridge doesn't have _STA, we assume it is always there */
+	status = acpi_get_handle(handle, "_STA", &dummy_handle);
+	if (ACPI_SUCCESS(status)) {
+		status = acpi_evaluate_integer(handle, "_STA", NULL, &tmp);
+		if (ACPI_FAILURE(status)) {
+			dbg("%s: _STA evaluation failure", __FUNCTION__);
+			return 0;
+		}
+		if ((tmp & ACPI_STA_FUNCTIONING) == 0)
+			/* don't register this object */
+			return 0;
+	}
+
+	/* get PCI segment number */
+	status = acpi_evaluate_integer(handle, "_SEG", NULL, &tmp);
+
+	seg = ACPI_SUCCESS(status) ? tmp : 0;
+
+	/* get PCI bus number */
+	status = acpi_evaluate_integer(handle, "_BBN", NULL, &tmp);
+
+	if (ACPI_SUCCESS(status)) {
+		bus = tmp;
+	} else {
+		warn("can't get bus number, assuming 0");
+		bus = 0;
+	}
+
+	/* check if this bridge has ejectable slots */
+	if (detect_ejectable_slots(handle) > 0) {
+		dbg("found PCI host-bus bridge with hot-pluggable slots");
+		add_host_bridge(handle, seg, 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);
+
+	if (ACPI_FAILURE(status))
+		warn("find_p2p_bridge faied (error code = 0x%x)",status);
+
+	return 0;
+}
+
+
+/* callback routine to enumerate all the bridges in ACPI namespace */
+static acpi_status
+find_host_bridge (acpi_handle handle, u32 lvl, void *context, void **rv)
+{
+	acpi_status status;
+	acpi_device_info info;
+	char objname[5];
+	acpi_buffer buffer = { sizeof(objname), objname };
+
+	status = acpi_get_object_info(handle, &info);
+	if (ACPI_FAILURE(status)) {
+		dbg("%s: failed to get bridge information", __FUNCTION__);
+		return AE_OK;		/* continue */
+	}
+
+	info.hardware_id[sizeof(info.hardware_id)-1] = '\0';
+
+	/* TBD check _CID also */
+	if (strcmp(info.hardware_id, ACPI_PCI_HOST_HID) == 0) {
+
+		acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer);
+		dbg("checking PCI-hotplug capable bridges under [%s]", objname);
+		add_bridges(handle);
+	}
+	return AE_OK;
+}
+
+
+static int power_on_slot (struct acpiphp_slot *slot)
+{
+	acpi_status status;
+	struct acpiphp_func *func;
+	struct list_head *l;
+	int retval = 0;
+
+	/* is this already enabled? */
+	if (slot->flags & SLOT_POWEREDON)
+		goto err_exit;
+
+	list_for_each(l, &slot->funcs) {
+		func = list_entry(l, struct acpiphp_func, sibling);
+
+		if (func->flags & FUNC_HAS_PS0) {
+			dbg("%s: executing _PS0 on %02x:%02x.%d", __FUNCTION__,
+			    slot->bridge->bus, slot->device, func->function);
+			status = acpi_evaluate_object(func->handle, "_PS0", NULL, NULL);
+			if (ACPI_FAILURE(status)) {
+				warn("%s: _PS0 failed", __FUNCTION__);
+				retval = -1;
+				goto err_exit;
+			}
+		}
+	}
+
+	/* TBD: evaluate _STA to check if the slot is enabled */
+
+	slot->flags |= SLOT_POWEREDON;
+
+ err_exit:
+	return retval;
+}
+
+
+static int power_off_slot (struct acpiphp_slot *slot)
+{
+	acpi_status status;
+	struct acpiphp_func *func;
+	struct list_head *l;
+	acpi_object_list arg_list;
+	acpi_object arg;
+
+	int retval = 0;
+
+	/* is this already enabled? */
+	if ((slot->flags & SLOT_POWEREDON) == 0)
+		goto err_exit;
+
+	list_for_each(l, &slot->funcs) {
+		func = list_entry(l, struct acpiphp_func, sibling);
+
+		if (func->flags & FUNC_HAS_PS3) {
+			dbg("%s: executing _PS3 on %02x:%02x.%d", __FUNCTION__,
+			    slot->bridge->bus, slot->device, func->function);
+			status = acpi_evaluate_object(func->handle, "_PS3", NULL, NULL);
+			if (ACPI_FAILURE(status)) {
+				warn("%s: _PS3 failed", __FUNCTION__);
+				retval = -1;
+				goto err_exit;
+			}
+		}
+	}
+
+	list_for_each(l, &slot->funcs) {
+		func = list_entry(l, struct acpiphp_func, sibling);
+
+		if (func->flags & FUNC_HAS_EJ0) {
+			dbg("%s: executing _EJ0 on %02x:%02x.%d", __FUNCTION__,
+			    slot->bridge->bus, slot->device, func->function);
+
+			/* _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", __FUNCTION__);
+				retval = -1;
+				goto err_exit;
+			}
+		}
+	}
+
+	/* TBD: evaluate _STA to check if the slot is disabled */
+
+	slot->flags &= (~SLOT_POWEREDON);
+
+ err_exit:
+	return retval;
+}
+
+
+/**
+ * enable_device - enable, configure a slot
+ * @slot: slot to be enabled
+ *
+ * This function should be called per *physical slot*,
+ * not per each slot object in ACPI namespace.
+ *
+ */
+static int enable_device (struct acpiphp_slot *slot)
+{
+	acpi_status status;
+	u8 bus;
+	struct pci_dev dev0, *dev;
+	struct pci_bus *child;
+	struct list_head *l;
+	struct acpiphp_func *func;
+	int retval = 0;
+
+	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));
+	if (dev) {
+		/* This case shouldn't happen */
+		err("pci_dev structure already exists.");
+		retval = -1;
+		goto err_exit;
+	}
+
+	/* allocate resources to device */
+	retval = acpiphp_configure_slot(slot);
+	if (retval)
+		goto err_exit;
+
+	memset(&dev0, 0, sizeof (struct pci_dev));
+
+	dev0.bus = slot->bridge->pci_bus;
+	dev0.devfn = PCI_DEVFN(slot->device, 0);
+	dev0.sysdata = dev0.bus->sysdata;
+
+	/* returned `dev' is the *first function* only! */
+	dev = pci_scan_slot (&dev0);
+
+	if (!dev) {
+		err("No new device found");
+		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);
+	}
+
+	/* 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->function));
+		if (!func->pci_dev)
+			continue;
+
+		/* configure device */
+		retval = acpiphp_configure_function(func);
+		if (retval)
+			goto err_exit;
+	}
+
+	slot->flags |= SLOT_ENABLED;
+
+#if 1
+	dbg("Available resources:");
+	acpiphp_dump_resource(slot->bridge);
+#endif
+
+ err_exit:
+	return retval;
+}
+
+
+/**
+ * disable_device - disable a slot
+ */
+static int disable_device (struct acpiphp_slot *slot)
+{
+	int retval = 0;
+	struct acpiphp_func *func;
+	struct list_head *l;
+	acpi_status status;
+
+	/* is this slot already disabled? */
+	if (!(slot->flags & SLOT_ENABLED))
+		goto err_exit;
+
+	list_for_each(l, &slot->funcs) {
+		func = list_entry(l, struct acpiphp_func, sibling);
+
+		if (func->pci_dev) {
+			if (acpiphp_unconfigure_function(func) == 0) {
+				func->pci_dev = NULL;
+			} else {
+				err("failed to unconfigure device");
+				retval = -1;
+				goto err_exit;
+			}
+		}
+	}
+
+	slot->flags &= (~SLOT_ENABLED);
+
+ err_exit:
+	return retval;
+}
+
+
+/**
+ * get_slot_status - get ACPI slot status
+ *
+ * if a slot has _STA for each function and if any one of them
+ * returned non-zero status, return it
+ *
+ * if a slot doesn't have _STA and if any one of its functions'
+ * configuration space is configured, return 0x0f as a _STA
+ *
+ * otherwise return 0
+ */
+static unsigned int get_slot_status (struct acpiphp_slot *slot)
+{
+	acpi_status status;
+	unsigned long sta = 0;
+	int fn;
+	u32 dvid;
+	struct list_head *l;
+	struct acpiphp_func *func;
+
+	list_for_each(l, &slot->funcs) {
+		func = list_entry(l, struct acpiphp_func, sibling);
+
+		if (func->flags & FUNC_HAS_STA) {
+			status = acpi_evaluate_integer(func->handle, "_STA", NULL, &sta);
+			if (ACPI_SUCCESS(status) && sta)
+				break;
+		} else {
+			pci_read_config_dword_nodev(default_ops,
+						    slot->bridge->bus,
+						    slot->device,
+						    func->function,
+						    PCI_VENDOR_ID, &dvid);
+			if (dvid != 0xffffffff) {
+				sta = ACPI_STA_ALL;
+				break;
+			}
+		}
+	}
+
+	return (unsigned int)sta;
+}
+
+
+/*
+ * ACPI event handlers
+ */
+
+/**
+ * handle_hotplug_event_bridge - handle ACPI event on bridges
+ *
+ * @handle: Notify()'ed acpi_handle 
+ * @type: Notify code
+ * @context: pointer to acpiphp_bridge structure
+ *
+ * handles ACPI event notification on {host,p2p} bridges
+ *
+ */
+static void handle_hotplug_event_bridge (acpi_handle handle, u32 type, void *context)
+{
+	struct acpiphp_bridge *bridge;
+	char objname[64];
+	acpi_buffer buffer = { sizeof(objname), objname };
+
+	bridge = (struct acpiphp_bridge *)context;
+
+	acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
+
+	switch (type) {
+	case ACPI_NOTIFY_BUS_CHECK:
+		/* bus re-enumerate */
+		dbg("%s: Bus check notify on %s", __FUNCTION__, objname);
+		acpiphp_check_bridge(bridge);
+		break;
+
+	case ACPI_NOTIFY_DEVICE_CHECK:
+		/* device check */
+		dbg("%s: Device check notify on %s", __FUNCTION__, objname);
+		acpiphp_check_bridge(bridge);
+		break;
+
+	case ACPI_NOTIFY_DEVICE_WAKE:
+		/* wake event */
+		dbg("%s: Device wake notify on %s", __FUNCTION__, objname);
+		break;
+
+	case ACPI_NOTIFY_EJECT_REQUEST:
+		/* request device eject */
+		dbg("%s: Device eject notify on %s", __FUNCTION__, objname);
+		break;
+
+	default:
+		warn("notify_handler: unknown event type 0x%x for %s", type, objname);
+		break;
+	}
+}
+
+
+/**
+ * handle_hotplug_event_func - handle ACPI event on functions (i.e. slots)
+ *
+ * @handle: Notify()'ed acpi_handle 
+ * @type: Notify code
+ * @context: pointer to acpiphp_func structure
+ *
+ * handles ACPI event notification on slots
+ *
+ */
+static void handle_hotplug_event_func (acpi_handle handle, u32 type, void *context)
+{
+	struct acpiphp_func *func;
+	char objname[64];
+	acpi_buffer buffer = { sizeof(objname), objname };
+
+	acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
+
+	func = (struct acpiphp_func *)context;
+
+	switch (type) {
+	case ACPI_NOTIFY_BUS_CHECK:
+		/* bus re-enumerate */
+		dbg("%s: Bus check notify on %s", __FUNCTION__, objname);
+		acpiphp_enable_slot(func->slot);
+		break;
+
+	case ACPI_NOTIFY_DEVICE_CHECK:
+		/* device check : re-enumerate from parent bus */
+		dbg("%s: Device check notify on %s", __FUNCTION__, objname);
+		acpiphp_check_bridge(func->slot->bridge);
+		break;
+
+	case ACPI_NOTIFY_DEVICE_WAKE:
+		/* wake event */
+		dbg("%s: Device wake notify on %s", __FUNCTION__, objname);
+		break;
+
+	case ACPI_NOTIFY_EJECT_REQUEST:
+		/* request device eject */
+		dbg("%s: Device eject notify on %s", __FUNCTION__, objname);
+		acpiphp_disable_slot(func->slot);
+		break;
+
+	default:
+		warn("notify_handler: unknown event type 0x%x for %s", type, objname);
+		break;
+	}
+}
+
+
+/**
+ * acpiphp_glue_init - initializes all PCI hotplug - ACPI glue data structures
+ *
+ */
+int acpiphp_glue_init (void)
+{
+	acpi_status status;
+
+	if (list_empty(&pci_root_buses))
+		return -1;
+
+	/* set default pci_ops for configuration space operation */
+	default_ops = pci_bus_b(pci_root_buses.next)->ops;
+	if (!default_ops)
+		return -1;
+
+	status = acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
+				     ACPI_UINT32_MAX, find_host_bridge,
+				     NULL, NULL);
+
+	if (ACPI_FAILURE(status)) {
+		err("%s: acpi_walk_namespace() failed", __FUNCTION__);
+		return -1;
+	}
+
+	return 0;
+}
+
+
+/**
+ * acpiphp_glue_exit - terminates all PCI hotplug - ACPI glue data structures
+ *
+ * This function frees all data allocated in acpiphp_glue_init()
+ */
+void acpiphp_glue_exit (void)
+{
+	struct list_head *node, *shead, *l, *n;
+	struct acpiphp_bridge *bridge;
+	struct acpiphp_slot *slot, *next;
+	struct acpiphp_func *func;
+	acpi_status status;
+
+	list_for_each(node, &bridge_list) {
+		bridge = (struct acpiphp_bridge *)node;
+		slot = bridge->slots;
+		while (slot) {
+			next = slot->next;
+			list_for_each_safe(l, n, &slot->funcs) {
+				func = list_entry(l, 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");
+				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");
+
+		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);
+	}
+}
+
+
+/**
+ * acpiphp_get_num_slots - count number of slots in a system
+ */
+int acpiphp_get_num_slots (void)
+{
+	struct list_head *node;
+	struct acpiphp_bridge *bridge;
+	int num_slots;
+
+	num_slots = 0;
+
+	list_for_each(node, &bridge_list) {
+		bridge = (struct acpiphp_bridge *)node;
+		dbg("Bus%d %dslot(s)", bridge->bus, bridge->nr_slots);
+		num_slots += bridge->nr_slots;
+	}
+
+	dbg("Total %dslots", num_slots);
+	return num_slots;
+}
+
+
+/**
+ * acpiphp_for_each_slot - call function for each slot
+ * @fn: callback function
+ * @data: context to be passed to callback function
+ *
+ */
+int acpiphp_for_each_slot(acpiphp_callback fn, void *data)
+{
+	struct list_head *node;
+	struct acpiphp_bridge *bridge;
+	struct acpiphp_slot *slot;
+	int retval = 0;
+
+	list_for_each(node, &bridge_list) {
+		bridge = (struct acpiphp_bridge *)node;
+		for (slot = bridge->slots; slot; slot = slot->next) {
+			retval = fn(slot, data);
+			if (!retval)
+				goto err_exit;
+		}
+	}
+
+ err_exit:
+	return retval;
+}
+
+
+/* search matching slot from id  */
+struct acpiphp_slot *get_slot_from_id (int id)
+{
+	struct list_head *node;
+	struct acpiphp_bridge *bridge;
+	struct acpiphp_slot *slot;
+
+	list_for_each(node, &bridge_list) {
+		bridge = (struct acpiphp_bridge *)node;
+		for (slot = bridge->slots; slot; slot = slot->next)
+			if (slot->id == id)
+				return slot;
+	}
+
+	/* should never happen! */
+	err("%s: no object for id %d",__FUNCTION__, id);
+	return 0;
+}
+
+
+/**
+ * acpiphp_enable_slot - power on slot
+ */
+int acpiphp_enable_slot (struct acpiphp_slot *slot)
+{
+	int retval;
+	int online = 0;
+
+	down(&slot->crit_sect);
+
+	/* wake up all functions */
+	retval = power_on_slot(slot);
+	if (retval)
+		goto err_exit;
+
+	if (get_slot_status(slot) == ACPI_STA_ALL)
+		/* configure all functions */
+		retval = enable_device(slot);
+
+ err_exit:
+	up(&slot->crit_sect);
+	return retval;
+}
+
+
+/**
+ * acpiphp_disable_slot - power off slot
+ */
+int acpiphp_disable_slot (struct acpiphp_slot *slot)
+{
+	struct list_head *l;
+	struct acpiphp_func *func;
+	int retval = 0;
+
+	down(&slot->crit_sect);
+
+	/* unconfigure all functions */
+	retval = disable_device(slot);
+	if (retval)
+		goto err_exit;
+
+	/* power off all functions */
+	retval = power_off_slot(slot);
+	if (retval)
+		goto err_exit;
+
+#if 1
+	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:");
+	acpiphp_dump_resource(slot->bridge);
+#endif
+
+ err_exit:
+	up(&slot->crit_sect);
+	return retval;
+}
+
+
+/**
+ * acpiphp_check_bridge - re-enumerate devices
+ */
+int acpiphp_check_bridge (struct acpiphp_bridge *bridge)
+{
+	struct acpiphp_slot *slot;
+	unsigned int sta;
+	int retval = 0;
+	int enabled, disabled;
+
+	enabled = disabled = 0;
+
+	for (slot = bridge->slots; slot; slot = slot->next) {
+		sta = get_slot_status(slot);
+		if (slot->flags & SLOT_ENABLED) {
+			/* if enabled but not present, disable */
+			if (sta != ACPI_STA_ALL) {
+				retval = acpiphp_disable_slot(slot);
+				if (retval) {
+					err("Error occured in enabling");
+					up(&slot->crit_sect);
+					goto err_exit;
+				}
+				enabled++;
+			}
+		} else {
+			/* if disabled but present, enable */
+			if (sta == ACPI_STA_ALL) {
+				retval = acpiphp_enable_slot(slot);
+				if (retval) {
+					err("Error occured in enabling");
+					up(&slot->crit_sect);
+					goto err_exit;
+				}
+				disabled++;
+			}
+		}
+	}
+
+	dbg("%s: %d enabled, %d disabled", __FUNCTION__, enabled, disabled);
+
+ err_exit:
+	return retval;
+}
+
+
+/*
+ * slot enabled:  1
+ * slot disabled: 0
+ */
+u8 acpiphp_get_power_status (struct acpiphp_slot *slot)
+{
+	unsigned int sta;
+
+	sta = get_slot_status(slot);
+
+	return (sta & ACPI_STA_ENABLED) ? 1 : 0;
+}
+
+
+/*
+ * attention LED ON: 1
+ *              OFF: 0
+ *
+ * TBD
+ * no direct attention led status information via ACPI
+ *
+ */
+u8 acpiphp_get_attention_status (struct acpiphp_slot *slot)
+{
+	return 0;
+}
+
+
+/*
+ * latch closed:  1
+ * latch   open:  0
+ */
+u8 acpiphp_get_latch_status (struct acpiphp_slot *slot)
+{
+	unsigned int sta;
+
+	sta = get_slot_status(slot);
+
+	return (sta & ACPI_STA_SHOW_IN_UI) ? 1 : 0;
+}
+
+
+/*
+ * adapter presence : 1
+ *          absence : 0
+ */
+u8 acpiphp_get_adapter_status (struct acpiphp_slot *slot)
+{
+	unsigned int sta;
+
+	sta = get_slot_status(slot);
+
+	return (sta == 0) ? 0 : 1;
+}
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)