Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2911 insertions, 0 deletions

diff --git a/drivers/pci/hotplug/cpqphp_ctrl.c b/drivers/pci/hotplug/cpqphp_ctrl.c
new file mode 100644
index 0000000000..e429ecddc8
--- /dev/null
+++ b/drivers/pci/hotplug/cpqphp_ctrl.c
@@ -0,0 +1,2911 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Compaq Hot Plug Controller Driver
+ *
+ * Copyright (C) 1995,2001 Compaq Computer Corporation
+ * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
+ * Copyright (C) 2001 IBM Corp.
+ *
+ * All rights reserved.
+ *
+ * Send feedback to <greg@kroah.com>
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/wait.h>
+#include <linux/pci.h>
+#include <linux/pci_hotplug.h>
+#include <linux/kthread.h>
+#include "cpqphp.h"
+
+static u32 configure_new_device(struct controller *ctrl, struct pci_func *func,
+			u8 behind_bridge, struct resource_lists *resources);
+static int configure_new_function(struct controller *ctrl, struct pci_func *func,
+			u8 behind_bridge, struct resource_lists *resources);
+static void interrupt_event_handler(struct controller *ctrl);
+
+
+static struct task_struct *cpqhp_event_thread;
+static struct timer_list *pushbutton_pending;	/* = NULL */
+
+/* delay is in jiffies to wait for */
+static void long_delay(int delay)
+{
+	/*
+	 * XXX(hch): if someone is bored please convert all callers
+	 * to call msleep_interruptible directly.  They really want
+	 * to specify timeouts in natural units and spend a lot of
+	 * effort converting them to jiffies..
+	 */
+	msleep_interruptible(jiffies_to_msecs(delay));
+}
+
+
+/* FIXME: The following line needs to be somewhere else... */
+#define WRONG_BUS_FREQUENCY 0x07
+static u8 handle_switch_change(u8 change, struct controller *ctrl)
+{
+	int hp_slot;
+	u8 rc = 0;
+	u16 temp_word;
+	struct pci_func *func;
+	struct event_info *taskInfo;
+
+	if (!change)
+		return 0;
+
+	/* Switch Change */
+	dbg("cpqsbd:  Switch interrupt received.\n");
+
+	for (hp_slot = 0; hp_slot < 6; hp_slot++) {
+		if (change & (0x1L << hp_slot)) {
+			/*
+			 * this one changed.
+			 */
+			func = cpqhp_slot_find(ctrl->bus,
+				(hp_slot + ctrl->slot_device_offset), 0);
+
+			/* this is the structure that tells the worker thread
+			 * what to do
+			 */
+			taskInfo = &(ctrl->event_queue[ctrl->next_event]);
+			ctrl->next_event = (ctrl->next_event + 1) % 10;
+			taskInfo->hp_slot = hp_slot;
+
+			rc++;
+
+			temp_word = ctrl->ctrl_int_comp >> 16;
+			func->presence_save = (temp_word >> hp_slot) & 0x01;
+			func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02;
+
+			if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) {
+				/*
+				 * Switch opened
+				 */
+
+				func->switch_save = 0;
+
+				taskInfo->event_type = INT_SWITCH_OPEN;
+			} else {
+				/*
+				 * Switch closed
+				 */
+
+				func->switch_save = 0x10;
+
+				taskInfo->event_type = INT_SWITCH_CLOSE;
+			}
+		}
+	}
+
+	return rc;
+}
+
+/**
+ * cpqhp_find_slot - find the struct slot of given device
+ * @ctrl: scan lots of this controller
+ * @device: the device id to find
+ */
+static struct slot *cpqhp_find_slot(struct controller *ctrl, u8 device)
+{
+	struct slot *slot = ctrl->slot;
+
+	while (slot && (slot->device != device))
+		slot = slot->next;
+
+	return slot;
+}
+
+
+static u8 handle_presence_change(u16 change, struct controller *ctrl)
+{
+	int hp_slot;
+	u8 rc = 0;
+	u8 temp_byte;
+	u16 temp_word;
+	struct pci_func *func;
+	struct event_info *taskInfo;
+	struct slot *p_slot;
+
+	if (!change)
+		return 0;
+
+	/*
+	 * Presence Change
+	 */
+	dbg("cpqsbd:  Presence/Notify input change.\n");
+	dbg("         Changed bits are 0x%4.4x\n", change);
+
+	for (hp_slot = 0; hp_slot < 6; hp_slot++) {
+		if (change & (0x0101 << hp_slot)) {
+			/*
+			 * this one changed.
+			 */
+			func = cpqhp_slot_find(ctrl->bus,
+				(hp_slot + ctrl->slot_device_offset), 0);
+
+			taskInfo = &(ctrl->event_queue[ctrl->next_event]);
+			ctrl->next_event = (ctrl->next_event + 1) % 10;
+			taskInfo->hp_slot = hp_slot;
+
+			rc++;
+
+			p_slot = cpqhp_find_slot(ctrl, hp_slot + (readb(ctrl->hpc_reg + SLOT_MASK) >> 4));
+			if (!p_slot)
+				return 0;
+
+			/* If the switch closed, must be a button
+			 * If not in button mode, nevermind
+			 */
+			if (func->switch_save && (ctrl->push_button == 1)) {
+				temp_word = ctrl->ctrl_int_comp >> 16;
+				temp_byte = (temp_word >> hp_slot) & 0x01;
+				temp_byte |= (temp_word >> (hp_slot + 7)) & 0x02;
+
+				if (temp_byte != func->presence_save) {
+					/*
+					 * button Pressed (doesn't do anything)
+					 */
+					dbg("hp_slot %d button pressed\n", hp_slot);
+					taskInfo->event_type = INT_BUTTON_PRESS;
+				} else {
+					/*
+					 * button Released - TAKE ACTION!!!!
+					 */
+					dbg("hp_slot %d button released\n", hp_slot);
+					taskInfo->event_type = INT_BUTTON_RELEASE;
+
+					/* Cancel if we are still blinking */
+					if ((p_slot->state == BLINKINGON_STATE)
+					    || (p_slot->state == BLINKINGOFF_STATE)) {
+						taskInfo->event_type = INT_BUTTON_CANCEL;
+						dbg("hp_slot %d button cancel\n", hp_slot);
+					} else if ((p_slot->state == POWERON_STATE)
+						   || (p_slot->state == POWEROFF_STATE)) {
+						/* info(msg_button_ignore, p_slot->number); */
+						taskInfo->event_type = INT_BUTTON_IGNORE;
+						dbg("hp_slot %d button ignore\n", hp_slot);
+					}
+				}
+			} else {
+				/* Switch is open, assume a presence change
+				 * Save the presence state
+				 */
+				temp_word = ctrl->ctrl_int_comp >> 16;
+				func->presence_save = (temp_word >> hp_slot) & 0x01;
+				func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02;
+
+				if ((!(ctrl->ctrl_int_comp & (0x010000 << hp_slot))) ||
+				    (!(ctrl->ctrl_int_comp & (0x01000000 << hp_slot)))) {
+					/* Present */
+					taskInfo->event_type = INT_PRESENCE_ON;
+				} else {
+					/* Not Present */
+					taskInfo->event_type = INT_PRESENCE_OFF;
+				}
+			}
+		}
+	}
+
+	return rc;
+}
+
+
+static u8 handle_power_fault(u8 change, struct controller *ctrl)
+{
+	int hp_slot;
+	u8 rc = 0;
+	struct pci_func *func;
+	struct event_info *taskInfo;
+
+	if (!change)
+		return 0;
+
+	/*
+	 * power fault
+	 */
+
+	info("power fault interrupt\n");
+
+	for (hp_slot = 0; hp_slot < 6; hp_slot++) {
+		if (change & (0x01 << hp_slot)) {
+			/*
+			 * this one changed.
+			 */
+			func = cpqhp_slot_find(ctrl->bus,
+				(hp_slot + ctrl->slot_device_offset), 0);
+
+			taskInfo = &(ctrl->event_queue[ctrl->next_event]);
+			ctrl->next_event = (ctrl->next_event + 1) % 10;
+			taskInfo->hp_slot = hp_slot;
+
+			rc++;
+
+			if (ctrl->ctrl_int_comp & (0x00000100 << hp_slot)) {
+				/*
+				 * power fault Cleared
+				 */
+				func->status = 0x00;
+
+				taskInfo->event_type = INT_POWER_FAULT_CLEAR;
+			} else {
+				/*
+				 * power fault
+				 */
+				taskInfo->event_type = INT_POWER_FAULT;
+
+				if (ctrl->rev < 4) {
+					amber_LED_on(ctrl, hp_slot);
+					green_LED_off(ctrl, hp_slot);
+					set_SOGO(ctrl);
+
+					/* this is a fatal condition, we want
+					 * to crash the machine to protect from
+					 * data corruption. simulated_NMI
+					 * shouldn't ever return */
+					/* FIXME
+					simulated_NMI(hp_slot, ctrl); */
+
+					/* The following code causes a software
+					 * crash just in case simulated_NMI did
+					 * return */
+					/*FIXME
+					panic(msg_power_fault); */
+				} else {
+					/* set power fault status for this board */
+					func->status = 0xFF;
+					info("power fault bit %x set\n", hp_slot);
+				}
+			}
+		}
+	}
+
+	return rc;
+}
+
+
+/**
+ * sort_by_size - sort nodes on the list by their length, smallest first.
+ * @head: list to sort
+ */
+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;
+}
+
+
+/**
+ * sort_by_max_size - sort nodes on the list by their length, largest first.
+ * @head: list to sort
+ */
+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;
+}
+
+
+/**
+ * do_pre_bridge_resource_split - find node of resources that are unused
+ * @head: new list head
+ * @orig_head: original list head
+ * @alignment: max node size (?)
+ */
+static struct pci_resource *do_pre_bridge_resource_split(struct pci_resource **head,
+				struct pci_resource **orig_head, u32 alignment)
+{
+	struct pci_resource *prevnode = NULL;
+	struct pci_resource *node;
+	struct pci_resource *split_node;
+	u32 rc;
+	u32 temp_dword;
+	dbg("do_pre_bridge_resource_split\n");
+
+	if (!(*head) || !(*orig_head))
+		return NULL;
+
+	rc = cpqhp_resource_sort_and_combine(head);
+
+	if (rc)
+		return NULL;
+
+	if ((*head)->base != (*orig_head)->base)
+		return NULL;
+
+	if ((*head)->length == (*orig_head)->length)
+		return NULL;
+
+
+	/* If we got here, there the bridge requires some of the resource, but
+	 * we may be able to split some off of the front
+	 */
+
+	node = *head;
+
+	if (node->length & (alignment - 1)) {
+		/* this one isn't an aligned length, so we'll make a new entry
+		 * and split it up.
+		 */
+		split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
+
+		if (!split_node)
+			return NULL;
+
+		temp_dword = (node->length | (alignment-1)) + 1 - alignment;
+
+		split_node->base = node->base;
+		split_node->length = temp_dword;
+
+		node->length -= temp_dword;
+		node->base += split_node->length;
+
+		/* Put it in the list */
+		*head = split_node;
+		split_node->next = node;
+	}
+
+	if (node->length < alignment)
+		return NULL;
+
+	/* Now unlink it */
+	if (*head == node) {
+		*head = node->next;
+	} else {
+		prevnode = *head;
+		while (prevnode->next != node)
+			prevnode = prevnode->next;
+
+		prevnode->next = node->next;
+	}
+	node->next = NULL;
+
+	return node;
+}
+
+
+/**
+ * do_bridge_resource_split - find one node of resources that aren't in use
+ * @head: list head
+ * @alignment: max node size (?)
+ */
+static struct pci_resource *do_bridge_resource_split(struct pci_resource **head, u32 alignment)
+{
+	struct pci_resource *prevnode = NULL;
+	struct pci_resource *node;
+	u32 rc;
+	u32 temp_dword;
+
+	rc = cpqhp_resource_sort_and_combine(head);
+
+	if (rc)
+		return NULL;
+
+	node = *head;
+
+	while (node->next) {
+		prevnode = node;
+		node = node->next;
+		kfree(prevnode);
+	}
+
+	if (node->length < alignment)
+		goto error;
+
+	if (node->base & (alignment - 1)) {
+		/* Short circuit if adjusted size is too small */
+		temp_dword = (node->base | (alignment-1)) + 1;
+		if ((node->length - (temp_dword - node->base)) < alignment)
+			goto error;
+
+		node->length -= (temp_dword - node->base);
+		node->base = temp_dword;
+	}
+
+	if (node->length & (alignment - 1))
+		/* There's stuff in use after this node */
+		goto error;
+
+	return node;
+error:
+	kfree(node);
+	return NULL;
+}
+
+
+/**
+ * get_io_resource - find first node of given size not in ISA aliasing window.
+ * @head: list to search
+ * @size: size of node to find, must be a power of two.
+ *
+ * Description: 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.
+ */
+static struct pci_resource *get_io_resource(struct pci_resource **head, u32 size)
+{
+	struct pci_resource *prevnode;
+	struct pci_resource *node;
+	struct pci_resource *split_node;
+	u32 temp_dword;
+
+	if (!(*head))
+		return NULL;
+
+	if (cpqhp_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_dword = (node->base | (size-1)) + 1;
+
+			/* Short circuit if adjusted size is too small */
+			if ((node->length - (temp_dword - node->base)) < size)
+				continue;
+
+			split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
+
+			if (!split_node)
+				return NULL;
+
+			split_node->base = node->base;
+			split_node->length = temp_dword - node->base;
+			node->base = temp_dword;
+			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 = kmalloc(sizeof(*split_node), GFP_KERNEL);
+
+			if (!split_node)
+				return NULL;
+
+			split_node->base = node->base + size;
+			split_node->length = node->length - size;
+			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)
+			continue;
+
+		/* If we got here, then it is the right size
+		 * Now take it out of the list and break
+		 */
+		if (*head == node) {
+			*head = node->next;
+		} else {
+			prevnode = *head;
+			while (prevnode->next != node)
+				prevnode = prevnode->next;
+
+			prevnode->next = node->next;
+		}
+		node->next = NULL;
+		break;
+	}
+
+	return node;
+}
+
+
+/**
+ * get_max_resource - get largest node which has at least the given size.
+ * @head: the list to search the node in
+ * @size: the minimum size of the node to find
+ *
+ * Description: 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 *get_max_resource(struct pci_resource **head, u32 size)
+{
+	struct pci_resource *max;
+	struct pci_resource *temp;
+	struct pci_resource *split_node;
+	u32 temp_dword;
+
+	if (cpqhp_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_dword = (max->base | (size-1)) + 1;
+
+			/* Short circuit if adjusted size is too small */
+			if ((max->length - (temp_dword - max->base)) < size)
+				continue;
+
+			split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
+
+			if (!split_node)
+				return NULL;
+
+			split_node->base = max->base;
+			split_node->length = temp_dword - max->base;
+			max->base = temp_dword;
+			max->length -= split_node->length;
+
+			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
+			 */
+			split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
+
+			if (!split_node)
+				return NULL;
+			temp_dword = ((max->base + max->length) & ~(size - 1));
+			split_node->base = temp_dword;
+			split_node->length = max->length + max->base
+					     - split_node->base;
+			max->length -= split_node->length;
+
+			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 = *head;
+		if (temp == max) {
+			*head = max->next;
+		} else {
+			while (temp && temp->next != max)
+				temp = temp->next;
+
+			if (temp)
+				temp->next = max->next;
+		}
+
+		max->next = NULL;
+		break;
+	}
+
+	return max;
+}
+
+
+/**
+ * get_resource - find resource of given size and split up larger ones.
+ * @head: the list to search for resources
+ * @size: the size limit to use
+ *
+ * Description: 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.
+ */
+static struct pci_resource *get_resource(struct pci_resource **head, u32 size)
+{
+	struct pci_resource *prevnode;
+	struct pci_resource *node;
+	struct pci_resource *split_node;
+	u32 temp_dword;
+
+	if (cpqhp_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",
+		    __func__, size, node, node->base, node->length);
+		if (node->length < size)
+			continue;
+
+		if (node->base & (size - 1)) {
+			dbg("%s: not aligned\n", __func__);
+			/* this one isn't base aligned properly
+			 * so we'll make a new entry and split it up
+			 */
+			temp_dword = (node->base | (size-1)) + 1;
+
+			/* Short circuit if adjusted size is too small */
+			if ((node->length - (temp_dword - node->base)) < size)
+				continue;
+
+			split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
+
+			if (!split_node)
+				return NULL;
+
+			split_node->base = node->base;
+			split_node->length = temp_dword - node->base;
+			node->base = temp_dword;
+			node->length -= split_node->length;
+
+			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", __func__);
+			/* this one is longer than we need
+			 * so we'll make a new entry and split it up
+			 */
+			split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
+
+			if (!split_node)
+				return NULL;
+
+			split_node->base = node->base + size;
+			split_node->length = node->length - size;
+			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", __func__);
+		/* 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;
+		break;
+	}
+	return node;
+}
+
+
+/**
+ * cpqhp_resource_sort_and_combine - sort nodes by base addresses and clean up
+ * @head: the list to sort and clean up
+ *
+ * Description: 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 cpqhp_resource_sort_and_combine(struct pci_resource **head)
+{
+	struct pci_resource *node1;
+	struct pci_resource *node2;
+	int out_of_order = 1;
+
+	dbg("%s: head = %p, *head = %p\n", __func__, head, *head);
+
+	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", (*head)->base);
+	dbg("*head->next->base = 0x%x\n", (*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;
+}
+
+
+irqreturn_t cpqhp_ctrl_intr(int IRQ, void *data)
+{
+	struct controller *ctrl = data;
+	u8 schedule_flag = 0;
+	u8 reset;
+	u16 misc;
+	u32 Diff;
+
+
+	misc = readw(ctrl->hpc_reg + MISC);
+	/*
+	 * Check to see if it was our interrupt
+	 */
+	if (!(misc & 0x000C))
+		return IRQ_NONE;
+
+	if (misc & 0x0004) {
+		/*
+		 * Serial Output interrupt Pending
+		 */
+
+		/* Clear the interrupt */
+		misc |= 0x0004;
+		writew(misc, ctrl->hpc_reg + MISC);
+
+		/* Read to clear posted writes */
+		misc = readw(ctrl->hpc_reg + MISC);
+
+		dbg("%s - waking up\n", __func__);
+		wake_up_interruptible(&ctrl->queue);
+	}
+
+	if (misc & 0x0008) {
+		/* General-interrupt-input interrupt Pending */
+		Diff = readl(ctrl->hpc_reg + INT_INPUT_CLEAR) ^ ctrl->ctrl_int_comp;
+
+		ctrl->ctrl_int_comp = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
+
+		/* Clear the interrupt */
+		writel(Diff, ctrl->hpc_reg + INT_INPUT_CLEAR);
+
+		/* Read it back to clear any posted writes */
+		readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
+
+		if (!Diff)
+			/* Clear all interrupts */
+			writel(0xFFFFFFFF, ctrl->hpc_reg + INT_INPUT_CLEAR);
+
+		schedule_flag += handle_switch_change((u8)(Diff & 0xFFL), ctrl);
+		schedule_flag += handle_presence_change((u16)((Diff & 0xFFFF0000L) >> 16), ctrl);
+		schedule_flag += handle_power_fault((u8)((Diff & 0xFF00L) >> 8), ctrl);
+	}
+
+	reset = readb(ctrl->hpc_reg + RESET_FREQ_MODE);
+	if (reset & 0x40) {
+		/* Bus reset has completed */
+		reset &= 0xCF;
+		writeb(reset, ctrl->hpc_reg + RESET_FREQ_MODE);
+		reset = readb(ctrl->hpc_reg + RESET_FREQ_MODE);
+		wake_up_interruptible(&ctrl->queue);
+	}
+
+	if (schedule_flag) {
+		wake_up_process(cpqhp_event_thread);
+		dbg("Waking even thread");
+	}
+	return IRQ_HANDLED;
+}
+
+
+/**
+ * cpqhp_slot_create - Creates a node and adds it to the proper bus.
+ * @busnumber: bus where new node is to be located
+ *
+ * Returns pointer to the new node or %NULL if unsuccessful.
+ */
+struct pci_func *cpqhp_slot_create(u8 busnumber)
+{
+	struct pci_func *new_slot;
+	struct pci_func *next;
+
+	new_slot = kzalloc(sizeof(*new_slot), GFP_KERNEL);
+	if (new_slot == NULL)
+		return new_slot;
+
+	new_slot->next = NULL;
+	new_slot->configured = 1;
+
+	if (cpqhp_slot_list[busnumber] == NULL) {
+		cpqhp_slot_list[busnumber] = new_slot;
+	} else {
+		next = cpqhp_slot_list[busnumber];
+		while (next->next != NULL)
+			next = next->next;
+		next->next = new_slot;
+	}
+	return new_slot;
+}
+
+
+/**
+ * slot_remove - Removes a node from the linked list of slots.
+ * @old_slot: slot to remove
+ *
+ * Returns %0 if successful, !0 otherwise.
+ */
+static int slot_remove(struct pci_func *old_slot)
+{
+	struct pci_func *next;
+
+	if (old_slot == NULL)
+		return 1;
+
+	next = cpqhp_slot_list[old_slot->bus];
+	if (next == NULL)
+		return 1;
+
+	if (next == old_slot) {
+		cpqhp_slot_list[old_slot->bus] = old_slot->next;
+		cpqhp_destroy_board_resources(old_slot);
+		kfree(old_slot);
+		return 0;
+	}
+
+	while ((next->next != old_slot) && (next->next != NULL))
+		next = next->next;
+
+	if (next->next == old_slot) {
+		next->next = old_slot->next;
+		cpqhp_destroy_board_resources(old_slot);
+		kfree(old_slot);
+		return 0;
+	} else
+		return 2;
+}
+
+
+/**
+ * bridge_slot_remove - Removes a node from the linked list of slots.
+ * @bridge: bridge to remove
+ *
+ * Returns %0 if successful, !0 otherwise.
+ */
+static int bridge_slot_remove(struct pci_func *bridge)
+{
+	u8 subordinateBus, secondaryBus;
+	u8 tempBus;
+	struct pci_func *next;
+
+	secondaryBus = (bridge->config_space[0x06] >> 8) & 0xFF;
+	subordinateBus = (bridge->config_space[0x06] >> 16) & 0xFF;
+
+	for (tempBus = secondaryBus; tempBus <= subordinateBus; tempBus++) {
+		next = cpqhp_slot_list[tempBus];
+
+		while (!slot_remove(next))
+			next = cpqhp_slot_list[tempBus];
+	}
+
+	next = cpqhp_slot_list[bridge->bus];
+
+	if (next == NULL)
+		return 1;
+
+	if (next == bridge) {
+		cpqhp_slot_list[bridge->bus] = bridge->next;
+		goto out;
+	}
+
+	while ((next->next != bridge) && (next->next != NULL))
+		next = next->next;
+
+	if (next->next != bridge)
+		return 2;
+	next->next = bridge->next;
+out:
+	kfree(bridge);
+	return 0;
+}
+
+
+/**
+ * cpqhp_slot_find - Looks for a node by bus, and device, multiple functions accessed
+ * @bus: bus to find
+ * @device: device to find
+ * @index: is %0 for first function found, %1 for the second...
+ *
+ * Returns pointer to the node if successful, %NULL otherwise.
+ */
+struct pci_func *cpqhp_slot_find(u8 bus, u8 device, u8 index)
+{
+	int found = -1;
+	struct pci_func *func;
+
+	func = cpqhp_slot_list[bus];
+
+	if ((func == NULL) || ((func->device == device) && (index == 0)))
+		return func;
+
+	if (func->device == device)
+		found++;
+
+	while (func->next != NULL) {
+		func = func->next;
+
+		if (func->device == device)
+			found++;
+
+		if (found == index)
+			return func;
+	}
+
+	return NULL;
+}
+
+
+/* DJZ: I don't think is_bridge will work as is.
+ * FIXME */
+static int is_bridge(struct pci_func *func)
+{
+	/* Check the header type */
+	if (((func->config_space[0x03] >> 16) & 0xFF) == 0x01)
+		return 1;
+	else
+		return 0;
+}
+
+
+/**
+ * set_controller_speed - set the frequency and/or mode of a specific controller segment.
+ * @ctrl: controller to change frequency/mode for.
+ * @adapter_speed: the speed of the adapter we want to match.
+ * @hp_slot: the slot number where the adapter is installed.
+ *
+ * Returns %0 if we successfully change frequency and/or mode to match the
+ * adapter speed.
+ */
+static u8 set_controller_speed(struct controller *ctrl, u8 adapter_speed, u8 hp_slot)
+{
+	struct slot *slot;
+	struct pci_bus *bus = ctrl->pci_bus;
+	u8 reg;
+	u8 slot_power = readb(ctrl->hpc_reg + SLOT_POWER);
+	u16 reg16;
+	u32 leds = readl(ctrl->hpc_reg + LED_CONTROL);
+
+	if (bus->cur_bus_speed == adapter_speed)
+		return 0;
+
+	/* We don't allow freq/mode changes if we find another adapter running
+	 * in another slot on this controller
+	 */
+	for (slot = ctrl->slot; slot; slot = slot->next) {
+		if (slot->device == (hp_slot + ctrl->slot_device_offset))
+			continue;
+		if (get_presence_status(ctrl, slot) == 0)
+			continue;
+		/* If another adapter is running on the same segment but at a
+		 * lower speed/mode, we allow the new adapter to function at
+		 * this rate if supported
+		 */
+		if (bus->cur_bus_speed < adapter_speed)
+			return 0;
+
+		return 1;
+	}
+
+	/* If the controller doesn't support freq/mode changes and the
+	 * controller is running at a higher mode, we bail
+	 */
+	if ((bus->cur_bus_speed > adapter_speed) && (!ctrl->pcix_speed_capability))
+		return 1;
+
+	/* But we allow the adapter to run at a lower rate if possible */
+	if ((bus->cur_bus_speed < adapter_speed) && (!ctrl->pcix_speed_capability))
+		return 0;
+
+	/* We try to set the max speed supported by both the adapter and
+	 * controller
+	 */
+	if (bus->max_bus_speed < adapter_speed) {
+		if (bus->cur_bus_speed == bus->max_bus_speed)
+			return 0;
+		adapter_speed = bus->max_bus_speed;
+	}
+
+	writel(0x0L, ctrl->hpc_reg + LED_CONTROL);
+	writeb(0x00, ctrl->hpc_reg + SLOT_ENABLE);
+
+	set_SOGO(ctrl);
+	wait_for_ctrl_irq(ctrl);
+
+	if (adapter_speed != PCI_SPEED_133MHz_PCIX)
+		reg = 0xF5;
+	else
+		reg = 0xF4;
+	pci_write_config_byte(ctrl->pci_dev, 0x41, reg);
+
+	reg16 = readw(ctrl->hpc_reg + NEXT_CURR_FREQ);
+	reg16 &= ~0x000F;
+	switch (adapter_speed) {
+		case(PCI_SPEED_133MHz_PCIX):
+			reg = 0x75;
+			reg16 |= 0xB;
+			break;
+		case(PCI_SPEED_100MHz_PCIX):
+			reg = 0x74;
+			reg16 |= 0xA;
+			break;
+		case(PCI_SPEED_66MHz_PCIX):
+			reg = 0x73;
+			reg16 |= 0x9;
+			break;
+		case(PCI_SPEED_66MHz):
+			reg = 0x73;
+			reg16 |= 0x1;
+			break;
+		default: /* 33MHz PCI 2.2 */
+			reg = 0x71;
+			break;
+
+	}
+	reg16 |= 0xB << 12;
+	writew(reg16, ctrl->hpc_reg + NEXT_CURR_FREQ);
+
+	mdelay(5);
+
+	/* Re-enable interrupts */
+	writel(0, ctrl->hpc_reg + INT_MASK);
+
+	pci_write_config_byte(ctrl->pci_dev, 0x41, reg);
+
+	/* Restart state machine */
+	reg = ~0xF;
+	pci_read_config_byte(ctrl->pci_dev, 0x43, &reg);
+	pci_write_config_byte(ctrl->pci_dev, 0x43, reg);
+
+	/* Only if mode change...*/
+	if (((bus->cur_bus_speed == PCI_SPEED_66MHz) && (adapter_speed == PCI_SPEED_66MHz_PCIX)) ||
+		((bus->cur_bus_speed == PCI_SPEED_66MHz_PCIX) && (adapter_speed == PCI_SPEED_66MHz)))
+			set_SOGO(ctrl);
+
+	wait_for_ctrl_irq(ctrl);
+	mdelay(1100);
+
+	/* Restore LED/Slot state */
+	writel(leds, ctrl->hpc_reg + LED_CONTROL);
+	writeb(slot_power, ctrl->hpc_reg + SLOT_ENABLE);
+
+	set_SOGO(ctrl);
+	wait_for_ctrl_irq(ctrl);
+
+	bus->cur_bus_speed = adapter_speed;
+	slot = cpqhp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
+
+	info("Successfully changed frequency/mode for adapter in slot %d\n",
+			slot->number);
+	return 0;
+}
+
+/* the following routines constitute the bulk of the
+ * hotplug controller logic
+ */
+
+
+/**
+ * board_replaced - Called after a board has been replaced in the system.
+ * @func: PCI device/function information
+ * @ctrl: hotplug controller
+ *
+ * This is only used if we don't have resources for hot add.
+ * Turns power on for the board.
+ * Checks to see if board is the same.
+ * If board is same, reconfigures it.
+ * If board isn't same, turns it back off.
+ */
+static u32 board_replaced(struct pci_func *func, struct controller *ctrl)
+{
+	struct pci_bus *bus = ctrl->pci_bus;
+	u8 hp_slot;
+	u8 temp_byte;
+	u8 adapter_speed;
+	u32 rc = 0;
+
+	hp_slot = func->device - ctrl->slot_device_offset;
+
+	/*
+	 * The switch is open.
+	 */
+	if (readl(ctrl->hpc_reg + INT_INPUT_CLEAR) & (0x01L << hp_slot))
+		rc = INTERLOCK_OPEN;
+	/*
+	 * The board is already on
+	 */
+	else if (is_slot_enabled(ctrl, hp_slot))
+		rc = CARD_FUNCTIONING;
+	else {
+		mutex_lock(&ctrl->crit_sect);
+
+		/* turn on board without attaching to the bus */
+		enable_slot_power(ctrl, hp_slot);
+
+		set_SOGO(ctrl);
+
+		/* Wait for SOBS to be unset */
+		wait_for_ctrl_irq(ctrl);
+
+		/* Change bits in slot power register to force another shift out
+		 * NOTE: this is to work around the timer bug */
+		temp_byte = readb(ctrl->hpc_reg + SLOT_POWER);
+		writeb(0x00, ctrl->hpc_reg + SLOT_POWER);
+		writeb(temp_byte, ctrl->hpc_reg + SLOT_POWER);
+
+		set_SOGO(ctrl);
+
+		/* Wait for SOBS to be unset */
+		wait_for_ctrl_irq(ctrl);
+
+		adapter_speed = get_adapter_speed(ctrl, hp_slot);
+		if (bus->cur_bus_speed != adapter_speed)
+			if (set_controller_speed(ctrl, adapter_speed, hp_slot))
+				rc = WRONG_BUS_FREQUENCY;
+
+		/* turn off board without attaching to the bus */
+		disable_slot_power(ctrl, hp_slot);
+
+		set_SOGO(ctrl);
+
+		/* Wait for SOBS to be unset */
+		wait_for_ctrl_irq(ctrl);
+
+		mutex_unlock(&ctrl->crit_sect);
+
+		if (rc)
+			return rc;
+
+		mutex_lock(&ctrl->crit_sect);
+
+		slot_enable(ctrl, hp_slot);
+		green_LED_blink(ctrl, hp_slot);
+
+		amber_LED_off(ctrl, hp_slot);
+
+		set_SOGO(ctrl);
+
+		/* Wait for SOBS to be unset */
+		wait_for_ctrl_irq(ctrl);
+
+		mutex_unlock(&ctrl->crit_sect);
+
+		/* Wait for ~1 second because of hot plug spec */
+		long_delay(1*HZ);
+
+		/* Check for a power fault */
+		if (func->status == 0xFF) {
+			/* power fault occurred, but it was benign */
+			rc = POWER_FAILURE;
+			func->status = 0;
+		} else
+			rc = cpqhp_valid_replace(ctrl, func);
+
+		if (!rc) {
+			/* It must be the same board */
+
+			rc = cpqhp_configure_board(ctrl, func);
+
+			/* If configuration fails, turn it off
+			 * Get slot won't work for devices behind
+			 * bridges, but in this case it will always be
+			 * called for the "base" bus/dev/func of an
+			 * adapter.
+			 */
+
+			mutex_lock(&ctrl->crit_sect);
+
+			amber_LED_on(ctrl, hp_slot);
+			green_LED_off(ctrl, hp_slot);
+			slot_disable(ctrl, hp_slot);
+
+			set_SOGO(ctrl);
+
+			/* Wait for SOBS to be unset */
+			wait_for_ctrl_irq(ctrl);
+
+			mutex_unlock(&ctrl->crit_sect);
+
+			if (rc)
+				return rc;
+			else
+				return 1;
+
+		} else {
+			/* Something is wrong
+
+			 * Get slot won't work for devices behind bridges, but
+			 * in this case it will always be called for the "base"
+			 * bus/dev/func of an adapter.
+			 */
+
+			mutex_lock(&ctrl->crit_sect);
+
+			amber_LED_on(ctrl, hp_slot);
+			green_LED_off(ctrl, hp_slot);
+			slot_disable(ctrl, hp_slot);
+
+			set_SOGO(ctrl);
+
+			/* Wait for SOBS to be unset */
+			wait_for_ctrl_irq(ctrl);
+
+			mutex_unlock(&ctrl->crit_sect);
+		}
+
+	}
+	return rc;
+
+}
+
+
+/**
+ * board_added - Called after a board has been added to the system.
+ * @func: PCI device/function info
+ * @ctrl: hotplug controller
+ *
+ * Turns power on for the board.
+ * Configures board.
+ */
+static u32 board_added(struct pci_func *func, struct controller *ctrl)
+{
+	u8 hp_slot;
+	u8 temp_byte;
+	u8 adapter_speed;
+	int index;
+	u32 temp_register = 0xFFFFFFFF;
+	u32 rc = 0;
+	struct pci_func *new_slot = NULL;
+	struct pci_bus *bus = ctrl->pci_bus;
+	struct resource_lists res_lists;
+
+	hp_slot = func->device - ctrl->slot_device_offset;
+	dbg("%s: func->device, slot_offset, hp_slot = %d, %d ,%d\n",
+	    __func__, func->device, ctrl->slot_device_offset, hp_slot);
+
+	mutex_lock(&ctrl->crit_sect);
+
+	/* turn on board without attaching to the bus */
+	enable_slot_power(ctrl, hp_slot);
+
+	set_SOGO(ctrl);
+
+	/* Wait for SOBS to be unset */
+	wait_for_ctrl_irq(ctrl);
+
+	/* Change bits in slot power register to force another shift out
+	 * NOTE: this is to work around the timer bug
+	 */
+	temp_byte = readb(ctrl->hpc_reg + SLOT_POWER);
+	writeb(0x00, ctrl->hpc_reg + SLOT_POWER);
+	writeb(temp_byte, ctrl->hpc_reg + SLOT_POWER);
+
+	set_SOGO(ctrl);
+
+	/* Wait for SOBS to be unset */
+	wait_for_ctrl_irq(ctrl);
+
+	adapter_speed = get_adapter_speed(ctrl, hp_slot);
+	if (bus->cur_bus_speed != adapter_speed)
+		if (set_controller_speed(ctrl, adapter_speed, hp_slot))
+			rc = WRONG_BUS_FREQUENCY;
+
+	/* turn off board without attaching to the bus */
+	disable_slot_power(ctrl, hp_slot);
+
+	set_SOGO(ctrl);
+
+	/* Wait for SOBS to be unset */
+	wait_for_ctrl_irq(ctrl);
+
+	mutex_unlock(&ctrl->crit_sect);
+
+	if (rc)
+		return rc;
+
+	cpqhp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
+
+	/* turn on board and blink green LED */
+
+	dbg("%s: before down\n", __func__);
+	mutex_lock(&ctrl->crit_sect);
+	dbg("%s: after down\n", __func__);
+
+	dbg("%s: before slot_enable\n", __func__);
+	slot_enable(ctrl, hp_slot);
+
+	dbg("%s: before green_LED_blink\n", __func__);
+	green_LED_blink(ctrl, hp_slot);
+
+	dbg("%s: before amber_LED_blink\n", __func__);
+	amber_LED_off(ctrl, hp_slot);
+
+	dbg("%s: before set_SOGO\n", __func__);
+	set_SOGO(ctrl);
+
+	/* Wait for SOBS to be unset */
+	dbg("%s: before wait_for_ctrl_irq\n", __func__);
+	wait_for_ctrl_irq(ctrl);
+	dbg("%s: after wait_for_ctrl_irq\n", __func__);
+
+	dbg("%s: before up\n", __func__);
+	mutex_unlock(&ctrl->crit_sect);
+	dbg("%s: after up\n", __func__);
+
+	/* Wait for ~1 second because of hot plug spec */
+	dbg("%s: before long_delay\n", __func__);
+	long_delay(1*HZ);
+	dbg("%s: after long_delay\n", __func__);
+
+	dbg("%s: func status = %x\n", __func__, func->status);
+	/* Check for a power fault */
+	if (func->status == 0xFF) {
+		/* power fault occurred, but it was benign */
+		temp_register = 0xFFFFFFFF;
+		dbg("%s: temp register set to %x by power fault\n", __func__, temp_register);
+		rc = POWER_FAILURE;
+		func->status = 0;
+	} else {
+		/* Get vendor/device ID u32 */
+		ctrl->pci_bus->number = func->bus;
+		rc = pci_bus_read_config_dword(ctrl->pci_bus, PCI_DEVFN(func->device, func->function), PCI_VENDOR_ID, &temp_register);
+		dbg("%s: pci_read_config_dword returns %d\n", __func__, rc);
+		dbg("%s: temp_register is %x\n", __func__, temp_register);
+
+		if (rc != 0) {
+			/* Something's wrong here */
+			temp_register = 0xFFFFFFFF;
+			dbg("%s: temp register set to %x by error\n", __func__, temp_register);
+		}
+		/* Preset return code.  It will be changed later if things go okay. */
+		rc = NO_ADAPTER_PRESENT;
+	}
+
+	/* All F's is an empty slot or an invalid board */
+	if (temp_register != 0xFFFFFFFF) {
+		res_lists.io_head = ctrl->io_head;
+		res_lists.mem_head = ctrl->mem_head;
+		res_lists.p_mem_head = ctrl->p_mem_head;
+		res_lists.bus_head = ctrl->bus_head;
+		res_lists.irqs = NULL;
+
+		rc = configure_new_device(ctrl, func, 0, &res_lists);
+
+		dbg("%s: back from configure_new_device\n", __func__);
+		ctrl->io_head = res_lists.io_head;
+		ctrl->mem_head = res_lists.mem_head;
+		ctrl->p_mem_head = res_lists.p_mem_head;
+		ctrl->bus_head = res_lists.bus_head;
+
+		cpqhp_resource_sort_and_combine(&(ctrl->mem_head));
+		cpqhp_resource_sort_and_combine(&(ctrl->p_mem_head));
+		cpqhp_resource_sort_and_combine(&(ctrl->io_head));
+		cpqhp_resource_sort_and_combine(&(ctrl->bus_head));
+
+		if (rc) {
+			mutex_lock(&ctrl->crit_sect);
+
+			amber_LED_on(ctrl, hp_slot);
+			green_LED_off(ctrl, hp_slot);
+			slot_disable(ctrl, hp_slot);
+
+			set_SOGO(ctrl);
+
+			/* Wait for SOBS to be unset */
+			wait_for_ctrl_irq(ctrl);
+
+			mutex_unlock(&ctrl->crit_sect);
+			return rc;
+		} else {
+			cpqhp_save_slot_config(ctrl, func);
+		}
+
+
+		func->status = 0;
+		func->switch_save = 0x10;
+		func->is_a_board = 0x01;
+
+		/* next, we will instantiate the linux pci_dev structures (with
+		 * appropriate driver notification, if already present) */
+		dbg("%s: configure linux pci_dev structure\n", __func__);
+		index = 0;
+		do {
+			new_slot = cpqhp_slot_find(ctrl->bus, func->device, index++);
+			if (new_slot && !new_slot->pci_dev)
+				cpqhp_configure_device(ctrl, new_slot);
+		} while (new_slot);
+
+		mutex_lock(&ctrl->crit_sect);
+
+		green_LED_on(ctrl, hp_slot);
+
+		set_SOGO(ctrl);
+
+		/* Wait for SOBS to be unset */
+		wait_for_ctrl_irq(ctrl);
+
+		mutex_unlock(&ctrl->crit_sect);
+	} else {
+		mutex_lock(&ctrl->crit_sect);
+
+		amber_LED_on(ctrl, hp_slot);
+		green_LED_off(ctrl, hp_slot);
+		slot_disable(ctrl, hp_slot);
+
+		set_SOGO(ctrl);
+
+		/* Wait for SOBS to be unset */
+		wait_for_ctrl_irq(ctrl);
+
+		mutex_unlock(&ctrl->crit_sect);
+
+		return rc;
+	}
+	return 0;
+}
+
+
+/**
+ * remove_board - Turns off slot and LEDs
+ * @func: PCI device/function info
+ * @replace_flag: whether replacing or adding a new device
+ * @ctrl: target controller
+ */
+static u32 remove_board(struct pci_func *func, u32 replace_flag, struct controller *ctrl)
+{
+	int index;
+	u8 skip = 0;
+	u8 device;
+	u8 hp_slot;
+	u8 temp_byte;
+	struct resource_lists res_lists;
+	struct pci_func *temp_func;
+
+	if (cpqhp_unconfigure_device(func))
+		return 1;
+
+	device = func->device;
+
+	hp_slot = func->device - ctrl->slot_device_offset;
+	dbg("In %s, hp_slot = %d\n", __func__, hp_slot);
+
+	/* When we get here, it is safe to change base address registers.
+	 * We will attempt to save the base address register lengths */
+	if (replace_flag || !ctrl->add_support)
+		cpqhp_save_base_addr_length(ctrl, func);
+	else if (!func->bus_head && !func->mem_head &&
+		 !func->p_mem_head && !func->io_head) {
+		/* Here we check to see if we've saved any of the board's
+		 * resources already.  If so, we'll skip the attempt to
+		 * determine what's being used. */
+		index = 0;
+		temp_func = cpqhp_slot_find(func->bus, func->device, index++);
+		while (temp_func) {
+			if (temp_func->bus_head || temp_func->mem_head
+			    || temp_func->p_mem_head || temp_func->io_head) {
+				skip = 1;
+				break;
+			}
+			temp_func = cpqhp_slot_find(temp_func->bus, temp_func->device, index++);
+		}
+
+		if (!skip)
+			cpqhp_save_used_resources(ctrl, func);
+	}
+	/* Change status to shutdown */
+	if (func->is_a_board)
+		func->status = 0x01;
+	func->configured = 0;
+
+	mutex_lock(&ctrl->crit_sect);
+
+	green_LED_off(ctrl, hp_slot);
+	slot_disable(ctrl, hp_slot);
+
+	set_SOGO(ctrl);
+
+	/* turn off SERR for slot */
+	temp_byte = readb(ctrl->hpc_reg + SLOT_SERR);
+	temp_byte &= ~(0x01 << hp_slot);
+	writeb(temp_byte, ctrl->hpc_reg + SLOT_SERR);
+
+	/* Wait for SOBS to be unset */
+	wait_for_ctrl_irq(ctrl);
+
+	mutex_unlock(&ctrl->crit_sect);
+
+	if (!replace_flag && ctrl->add_support) {
+		while (func) {
+			res_lists.io_head = ctrl->io_head;
+			res_lists.mem_head = ctrl->mem_head;
+			res_lists.p_mem_head = ctrl->p_mem_head;
+			res_lists.bus_head = ctrl->bus_head;
+
+			cpqhp_return_board_resources(func, &res_lists);
+
+			ctrl->io_head = res_lists.io_head;
+			ctrl->mem_head = res_lists.mem_head;
+			ctrl->p_mem_head = res_lists.p_mem_head;
+			ctrl->bus_head = res_lists.bus_head;
+
+			cpqhp_resource_sort_and_combine(&(ctrl->mem_head));
+			cpqhp_resource_sort_and_combine(&(ctrl->p_mem_head));
+			cpqhp_resource_sort_and_combine(&(ctrl->io_head));
+			cpqhp_resource_sort_and_combine(&(ctrl->bus_head));
+
+			if (is_bridge(func)) {
+				bridge_slot_remove(func);
+			} else
+				slot_remove(func);
+
+			func = cpqhp_slot_find(ctrl->bus, device, 0);
+		}
+
+		/* Setup slot structure with entry for empty slot */
+		func = cpqhp_slot_create(ctrl->bus);
+
+		if (func == NULL)
+			return 1;
+
+		func->bus = ctrl->bus;
+		func->device = device;
+		func->function = 0;
+		func->configured = 0;
+		func->switch_save = 0x10;
+		func->is_a_board = 0;
+		func->p_task_event = NULL;
+	}
+
+	return 0;
+}
+
+static void pushbutton_helper_thread(struct timer_list *t)
+{
+	pushbutton_pending = t;
+
+	wake_up_process(cpqhp_event_thread);
+}
+
+
+/* this is the main worker thread */
+static int event_thread(void *data)
+{
+	struct controller *ctrl;
+
+	while (1) {
+		dbg("!!!!event_thread sleeping\n");
+		set_current_state(TASK_INTERRUPTIBLE);
+		schedule();
+
+		if (kthread_should_stop())
+			break;
+		/* Do stuff here */
+		if (pushbutton_pending)
+			cpqhp_pushbutton_thread(pushbutton_pending);
+		else
+			for (ctrl = cpqhp_ctrl_list; ctrl; ctrl = ctrl->next)
+				interrupt_event_handler(ctrl);
+	}
+	dbg("event_thread signals exit\n");
+	return 0;
+}
+
+int cpqhp_event_start_thread(void)
+{
+	cpqhp_event_thread = kthread_run(event_thread, NULL, "phpd_event");
+	if (IS_ERR(cpqhp_event_thread)) {
+		err("Can't start up our event thread\n");
+		return PTR_ERR(cpqhp_event_thread);
+	}
+
+	return 0;
+}
+
+
+void cpqhp_event_stop_thread(void)
+{
+	kthread_stop(cpqhp_event_thread);
+}
+
+
+static void interrupt_event_handler(struct controller *ctrl)
+{
+	int loop;
+	int change = 1;
+	struct pci_func *func;
+	u8 hp_slot;
+	struct slot *p_slot;
+
+	while (change) {
+		change = 0;
+
+		for (loop = 0; loop < 10; loop++) {
+			/* dbg("loop %d\n", loop); */
+			if (ctrl->event_queue[loop].event_type != 0) {
+				hp_slot = ctrl->event_queue[loop].hp_slot;
+
+				func = cpqhp_slot_find(ctrl->bus, (hp_slot + ctrl->slot_device_offset), 0);
+				if (!func)
+					return;
+
+				p_slot = cpqhp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
+				if (!p_slot)
+					return;
+
+				dbg("hp_slot %d, func %p, p_slot %p\n",
+				    hp_slot, func, p_slot);
+
+				if (ctrl->event_queue[loop].event_type == INT_BUTTON_PRESS) {
+					dbg("button pressed\n");
+				} else if (ctrl->event_queue[loop].event_type ==
+					   INT_BUTTON_CANCEL) {
+					dbg("button cancel\n");
+					del_timer(&p_slot->task_event);
+
+					mutex_lock(&ctrl->crit_sect);
+
+					if (p_slot->state == BLINKINGOFF_STATE) {
+						/* slot is on */
+						dbg("turn on green LED\n");
+						green_LED_on(ctrl, hp_slot);
+					} else if (p_slot->state == BLINKINGON_STATE) {
+						/* slot is off */
+						dbg("turn off green LED\n");
+						green_LED_off(ctrl, hp_slot);
+					}
+
+					info(msg_button_cancel, p_slot->number);
+
+					p_slot->state = STATIC_STATE;
+
+					amber_LED_off(ctrl, hp_slot);
+
+					set_SOGO(ctrl);
+
+					/* Wait for SOBS to be unset */
+					wait_for_ctrl_irq(ctrl);
+
+					mutex_unlock(&ctrl->crit_sect);
+				}
+				/*** button Released (No action on press...) */
+				else if (ctrl->event_queue[loop].event_type == INT_BUTTON_RELEASE) {
+					dbg("button release\n");
+
+					if (is_slot_enabled(ctrl, hp_slot)) {
+						dbg("slot is on\n");
+						p_slot->state = BLINKINGOFF_STATE;
+						info(msg_button_off, p_slot->number);
+					} else {
+						dbg("slot is off\n");
+						p_slot->state = BLINKINGON_STATE;
+						info(msg_button_on, p_slot->number);
+					}
+					mutex_lock(&ctrl->crit_sect);
+
+					dbg("blink green LED and turn off amber\n");
+
+					amber_LED_off(ctrl, hp_slot);
+					green_LED_blink(ctrl, hp_slot);
+
+					set_SOGO(ctrl);
+
+					/* Wait for SOBS to be unset */
+					wait_for_ctrl_irq(ctrl);
+
+					mutex_unlock(&ctrl->crit_sect);
+					timer_setup(&p_slot->task_event,
+						    pushbutton_helper_thread,
+						    0);
+					p_slot->hp_slot = hp_slot;
+					p_slot->ctrl = ctrl;
+/*					p_slot->physical_slot = physical_slot; */
+					p_slot->task_event.expires = jiffies + 5 * HZ;   /* 5 second delay */
+
+					dbg("add_timer p_slot = %p\n", p_slot);
+					add_timer(&p_slot->task_event);
+				}
+				/***********POWER FAULT */
+				else if (ctrl->event_queue[loop].event_type == INT_POWER_FAULT) {
+					dbg("power fault\n");
+				}
+
+				ctrl->event_queue[loop].event_type = 0;
+
+				change = 1;
+			}
+		}		/* End of FOR loop */
+	}
+}
+
+
+/**
+ * cpqhp_pushbutton_thread - handle pushbutton events
+ * @t: pointer to struct timer_list which holds all timer-related callbacks
+ *
+ * Scheduled procedure to handle blocking stuff for the pushbuttons.
+ * Handles all pending events and exits.
+ */
+void cpqhp_pushbutton_thread(struct timer_list *t)
+{
+	u8 hp_slot;
+	struct pci_func *func;
+	struct slot *p_slot = from_timer(p_slot, t, task_event);
+	struct controller *ctrl = (struct controller *) p_slot->ctrl;
+
+	pushbutton_pending = NULL;
+	hp_slot = p_slot->hp_slot;
+
+	if (is_slot_enabled(ctrl, hp_slot)) {
+		p_slot->state = POWEROFF_STATE;
+		/* power Down board */
+		func = cpqhp_slot_find(p_slot->bus, p_slot->device, 0);
+		dbg("In power_down_board, func = %p, ctrl = %p\n", func, ctrl);
+		if (!func) {
+			dbg("Error! func NULL in %s\n", __func__);
+			return;
+		}
+
+		if (cpqhp_process_SS(ctrl, func) != 0) {
+			amber_LED_on(ctrl, hp_slot);
+			green_LED_on(ctrl, hp_slot);
+
+			set_SOGO(ctrl);
+
+			/* Wait for SOBS to be unset */
+			wait_for_ctrl_irq(ctrl);
+		}
+
+		p_slot->state = STATIC_STATE;
+	} else {
+		p_slot->state = POWERON_STATE;
+		/* slot is off */
+
+		func = cpqhp_slot_find(p_slot->bus, p_slot->device, 0);
+		dbg("In add_board, func = %p, ctrl = %p\n", func, ctrl);
+		if (!func) {
+			dbg("Error! func NULL in %s\n", __func__);
+			return;
+		}
+
+		if (ctrl != NULL) {
+			if (cpqhp_process_SI(ctrl, func) != 0) {
+				amber_LED_on(ctrl, hp_slot);
+				green_LED_off(ctrl, hp_slot);
+
+				set_SOGO(ctrl);
+
+				/* Wait for SOBS to be unset */
+				wait_for_ctrl_irq(ctrl);
+			}
+		}
+
+		p_slot->state = STATIC_STATE;
+	}
+}
+
+
+int cpqhp_process_SI(struct controller *ctrl, struct pci_func *func)
+{
+	u8 device, hp_slot;
+	u16 temp_word;
+	u32 tempdword;
+	int rc;
+	struct slot *p_slot;
+
+	tempdword = 0;
+
+	device = func->device;
+	hp_slot = device - ctrl->slot_device_offset;
+	p_slot = cpqhp_find_slot(ctrl, device);
+
+	/* Check to see if the interlock is closed */
+	tempdword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
+
+	if (tempdword & (0x01 << hp_slot))
+		return 1;
+
+	if (func->is_a_board) {
+		rc = board_replaced(func, ctrl);
+	} else {
+		/* add board */
+		slot_remove(func);
+
+		func = cpqhp_slot_create(ctrl->bus);
+		if (func == NULL)
+			return 1;
+
+		func->bus = ctrl->bus;
+		func->device = device;
+		func->function = 0;
+		func->configured = 0;
+		func->is_a_board = 1;
+
+		/* We have to save the presence info for these slots */
+		temp_word = ctrl->ctrl_int_comp >> 16;
+		func->presence_save = (temp_word >> hp_slot) & 0x01;
+		func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02;
+
+		if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) {
+			func->switch_save = 0;
+		} else {
+			func->switch_save = 0x10;
+		}
+
+		rc = board_added(func, ctrl);
+		if (rc) {
+			if (is_bridge(func)) {
+				bridge_slot_remove(func);
+			} else
+				slot_remove(func);
+
+			/* Setup slot structure with entry for empty slot */
+			func = cpqhp_slot_create(ctrl->bus);
+
+			if (func == NULL)
+				return 1;
+
+			func->bus = ctrl->bus;
+			func->device = device;
+			func->function = 0;
+			func->configured = 0;
+			func->is_a_board = 0;
+
+			/* We have to save the presence info for these slots */
+			temp_word = ctrl->ctrl_int_comp >> 16;
+			func->presence_save = (temp_word >> hp_slot) & 0x01;
+			func->presence_save |=
+			(temp_word >> (hp_slot + 7)) & 0x02;
+
+			if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) {
+				func->switch_save = 0;
+			} else {
+				func->switch_save = 0x10;
+			}
+		}
+	}
+
+	if (rc)
+		dbg("%s: rc = %d\n", __func__, rc);
+
+	return rc;
+}
+
+
+int cpqhp_process_SS(struct controller *ctrl, struct pci_func *func)
+{
+	u8 device, class_code, header_type, BCR;
+	u8 index = 0;
+	u8 replace_flag;
+	u32 rc = 0;
+	unsigned int devfn;
+	struct slot *p_slot;
+	struct pci_bus *pci_bus = ctrl->pci_bus;
+
+	device = func->device;
+	func = cpqhp_slot_find(ctrl->bus, device, index++);
+	p_slot = cpqhp_find_slot(ctrl, device);
+
+	/* Make sure there are no video controllers here */
+	while (func && !rc) {
+		pci_bus->number = func->bus;
+		devfn = PCI_DEVFN(func->device, func->function);
+
+		/* Check the Class Code */
+		rc = pci_bus_read_config_byte(pci_bus, devfn, 0x0B, &class_code);
+		if (rc)
+			return rc;
+
+		if (class_code == PCI_BASE_CLASS_DISPLAY) {
+			/* Display/Video adapter (not supported) */
+			rc = REMOVE_NOT_SUPPORTED;
+		} else {
+			/* See if it's a bridge */
+			rc = pci_bus_read_config_byte(pci_bus, devfn, PCI_HEADER_TYPE, &header_type);
+			if (rc)
+				return rc;
+
+			/* If it's a bridge, check the VGA Enable bit */
+			if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
+				rc = pci_bus_read_config_byte(pci_bus, devfn, PCI_BRIDGE_CONTROL, &BCR);
+				if (rc)
+					return rc;
+
+				/* If the VGA Enable bit is set, remove isn't
+				 * supported */
+				if (BCR & PCI_BRIDGE_CTL_VGA)
+					rc = REMOVE_NOT_SUPPORTED;
+			}
+		}
+
+		func = cpqhp_slot_find(ctrl->bus, device, index++);
+	}
+
+	func = cpqhp_slot_find(ctrl->bus, device, 0);
+	if ((func != NULL) && !rc) {
+		/* FIXME: Replace flag should be passed into process_SS */
+		replace_flag = !(ctrl->add_support);
+		rc = remove_board(func, replace_flag, ctrl);
+	} else if (!rc) {
+		rc = 1;
+	}
+
+	return rc;
+}
+
+/**
+ * switch_leds - switch the leds, go from one site to the other.
+ * @ctrl: controller to use
+ * @num_of_slots: number of slots to use
+ * @work_LED: LED control value
+ * @direction: 1 to start from the left side, 0 to start right.
+ */
+static void switch_leds(struct controller *ctrl, const int num_of_slots,
+			u32 *work_LED, const int direction)
+{
+	int loop;
+
+	for (loop = 0; loop < num_of_slots; loop++) {
+		if (direction)
+			*work_LED = *work_LED >> 1;
+		else
+			*work_LED = *work_LED << 1;
+		writel(*work_LED, ctrl->hpc_reg + LED_CONTROL);
+
+		set_SOGO(ctrl);
+
+		/* Wait for SOGO interrupt */
+		wait_for_ctrl_irq(ctrl);
+
+		/* Get ready for next iteration */
+		long_delay((2*HZ)/10);
+	}
+}
+
+/**
+ * cpqhp_hardware_test - runs hardware tests
+ * @ctrl: target controller
+ * @test_num: the number written to the "test" file in sysfs.
+ *
+ * For hot plug ctrl folks to play with.
+ */
+int cpqhp_hardware_test(struct controller *ctrl, int test_num)
+{
+	u32 save_LED;
+	u32 work_LED;
+	int loop;
+	int num_of_slots;
+
+	num_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0f;
+
+	switch (test_num) {
+	case 1:
+		/* Do stuff here! */
+
+		/* Do that funky LED thing */
+		/* so we can restore them later */
+		save_LED = readl(ctrl->hpc_reg + LED_CONTROL);
+		work_LED = 0x01010101;
+		switch_leds(ctrl, num_of_slots, &work_LED, 0);
+		switch_leds(ctrl, num_of_slots, &work_LED, 1);
+		switch_leds(ctrl, num_of_slots, &work_LED, 0);
+		switch_leds(ctrl, num_of_slots, &work_LED, 1);
+
+		work_LED = 0x01010000;
+		writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
+		switch_leds(ctrl, num_of_slots, &work_LED, 0);
+		switch_leds(ctrl, num_of_slots, &work_LED, 1);
+		work_LED = 0x00000101;
+		writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
+		switch_leds(ctrl, num_of_slots, &work_LED, 0);
+		switch_leds(ctrl, num_of_slots, &work_LED, 1);
+
+		work_LED = 0x01010000;
+		writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
+		for (loop = 0; loop < num_of_slots; loop++) {
+			set_SOGO(ctrl);
+
+			/* Wait for SOGO interrupt */
+			wait_for_ctrl_irq(ctrl);
+
+			/* Get ready for next iteration */
+			long_delay((3*HZ)/10);
+			work_LED = work_LED >> 16;
+			writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
+
+			set_SOGO(ctrl);
+
+			/* Wait for SOGO interrupt */
+			wait_for_ctrl_irq(ctrl);
+
+			/* Get ready for next iteration */
+			long_delay((3*HZ)/10);
+			work_LED = work_LED << 16;
+			writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
+			work_LED = work_LED << 1;
+			writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
+		}
+
+		/* put it back the way it was */
+		writel(save_LED, ctrl->hpc_reg + LED_CONTROL);
+
+		set_SOGO(ctrl);
+
+		/* Wait for SOBS to be unset */
+		wait_for_ctrl_irq(ctrl);
+		break;
+	case 2:
+		/* Do other stuff here! */
+		break;
+	case 3:
+		/* and more... */
+		break;
+	}
+	return 0;
+}
+
+
+/**
+ * configure_new_device - Configures the PCI header information of one board.
+ * @ctrl: pointer to controller structure
+ * @func: pointer to function structure
+ * @behind_bridge: 1 if this is a recursive call, 0 if not
+ * @resources: pointer to set of resource lists
+ *
+ * Returns 0 if success.
+ */
+static u32 configure_new_device(struct controller  *ctrl, struct pci_func  *func,
+				 u8 behind_bridge, struct resource_lists  *resources)
+{
+	u8 temp_byte, function, max_functions, stop_it;
+	int rc;
+	u32 ID;
+	struct pci_func *new_slot;
+	int index;
+
+	new_slot = func;
+
+	dbg("%s\n", __func__);
+	/* Check for Multi-function device */
+	ctrl->pci_bus->number = func->bus;
+	rc = pci_bus_read_config_byte(ctrl->pci_bus, PCI_DEVFN(func->device, func->function), 0x0E, &temp_byte);
+	if (rc) {
+		dbg("%s: rc = %d\n", __func__, rc);
+		return rc;
+	}
+
+	if (temp_byte & 0x80)	/* Multi-function device */
+		max_functions = 8;
+	else
+		max_functions = 1;
+
+	function = 0;
+
+	do {
+		rc = configure_new_function(ctrl, new_slot, behind_bridge, resources);
+
+		if (rc) {
+			dbg("configure_new_function failed %d\n", rc);
+			index = 0;
+
+			while (new_slot) {
+				new_slot = cpqhp_slot_find(new_slot->bus, new_slot->device, index++);
+
+				if (new_slot)
+					cpqhp_return_board_resources(new_slot, resources);
+			}
+
+			return rc;
+		}
+
+		function++;
+
+		stop_it = 0;
+
+		/* The following loop skips to the next present function
+		 * and creates a board structure */
+
+		while ((function < max_functions) && (!stop_it)) {
+			pci_bus_read_config_dword(ctrl->pci_bus, PCI_DEVFN(func->device, function), 0x00, &ID);
+
+			if (PCI_POSSIBLE_ERROR(ID)) {
+				function++;
+			} else {
+				/* Setup slot structure. */
+				new_slot = cpqhp_slot_create(func->bus);
+
+				if (new_slot == NULL)
+					return 1;
+
+				new_slot->bus = func->bus;
+				new_slot->device = func->device;
+				new_slot->function = function;
+				new_slot->is_a_board = 1;
+				new_slot->status = 0;
+
+				stop_it++;
+			}
+		}
+
+	} while (function < max_functions);
+	dbg("returning from configure_new_device\n");
+
+	return 0;
+}
+
+
+/*
+ * Configuration logic that involves the hotplug data structures and
+ * their bookkeeping
+ */
+
+
+/**
+ * configure_new_function - Configures the PCI header information of one device
+ * @ctrl: pointer to controller structure
+ * @func: pointer to function structure
+ * @behind_bridge: 1 if this is a recursive call, 0 if not
+ * @resources: pointer to set of resource lists
+ *
+ * Calls itself recursively for bridged devices.
+ * Returns 0 if success.
+ */
+static int configure_new_function(struct controller *ctrl, struct pci_func *func,
+				   u8 behind_bridge,
+				   struct resource_lists *resources)
+{
+	int cloop;
+	u8 IRQ = 0;
+	u8 temp_byte;
+	u8 device;
+	u8 class_code;
+	u16 command;
+	u16 temp_word;
+	u32 temp_dword;
+	u32 rc;
+	u32 temp_register;
+	u32 base;
+	u32 ID;
+	unsigned int devfn;
+	struct pci_resource *mem_node;
+	struct pci_resource *p_mem_node;
+	struct pci_resource *io_node;
+	struct pci_resource *bus_node;
+	struct pci_resource *hold_mem_node;
+	struct pci_resource *hold_p_mem_node;
+	struct pci_resource *hold_IO_node;
+	struct pci_resource *hold_bus_node;
+	struct irq_mapping irqs;
+	struct pci_func *new_slot;
+	struct pci_bus *pci_bus;
+	struct resource_lists temp_resources;
+
+	pci_bus = ctrl->pci_bus;
+	pci_bus->number = func->bus;
+	devfn = PCI_DEVFN(func->device, func->function);
+
+	/* Check for Bridge */
+	rc = pci_bus_read_config_byte(pci_bus, devfn, PCI_HEADER_TYPE, &temp_byte);
+	if (rc)
+		return rc;
+
+	if ((temp_byte & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
+		/* set Primary bus */
+		dbg("set Primary bus = %d\n", func->bus);
+		rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_PRIMARY_BUS, func->bus);
+		if (rc)
+			return rc;
+
+		/* find range of buses to use */
+		dbg("find ranges of buses to use\n");
+		bus_node = get_max_resource(&(resources->bus_head), 1);
+
+		/* If we don't have any buses to allocate, we can't continue */
+		if (!bus_node)
+			return -ENOMEM;
+
+		/* set Secondary bus */
+		temp_byte = bus_node->base;
+		dbg("set Secondary bus = %d\n", bus_node->base);
+		rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SECONDARY_BUS, temp_byte);
+		if (rc)
+			return rc;
+
+		/* set subordinate bus */
+		temp_byte = bus_node->base + bus_node->length - 1;
+		dbg("set subordinate bus = %d\n", bus_node->base + bus_node->length - 1);
+		rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SUBORDINATE_BUS, temp_byte);
+		if (rc)
+			return rc;
+
+		/* set subordinate Latency Timer and base Latency Timer */
+		temp_byte = 0x40;
+		rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SEC_LATENCY_TIMER, temp_byte);
+		if (rc)
+			return rc;
+		rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_LATENCY_TIMER, temp_byte);
+		if (rc)
+			return rc;
+
+		/* set Cache Line size */
+		temp_byte = 0x08;
+		rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_CACHE_LINE_SIZE, temp_byte);
+		if (rc)
+			return rc;
+
+		/* Setup the IO, memory, and prefetchable windows */
+		io_node = get_max_resource(&(resources->io_head), 0x1000);
+		if (!io_node)
+			return -ENOMEM;
+		mem_node = get_max_resource(&(resources->mem_head), 0x100000);
+		if (!mem_node)
+			return -ENOMEM;
+		p_mem_node = get_max_resource(&(resources->p_mem_head), 0x100000);
+		if (!p_mem_node)
+			return -ENOMEM;
+		dbg("Setup the IO, memory, and prefetchable windows\n");
+		dbg("io_node\n");
+		dbg("(base, len, next) (%x, %x, %p)\n", io_node->base,
+					io_node->length, io_node->next);
+		dbg("mem_node\n");
+		dbg("(base, len, next) (%x, %x, %p)\n", mem_node->base,
+					mem_node->length, mem_node->next);
+		dbg("p_mem_node\n");
+		dbg("(base, len, next) (%x, %x, %p)\n", p_mem_node->base,
+					p_mem_node->length, p_mem_node->next);
+
+		/* set up the IRQ info */
+		if (!resources->irqs) {
+			irqs.barber_pole = 0;
+			irqs.interrupt[0] = 0;
+			irqs.interrupt[1] = 0;
+			irqs.interrupt[2] = 0;
+			irqs.interrupt[3] = 0;
+			irqs.valid_INT = 0;
+		} else {
+			irqs.barber_pole = resources->irqs->barber_pole;
+			irqs.interrupt[0] = resources->irqs->interrupt[0];
+			irqs.interrupt[1] = resources->irqs->interrupt[1];
+			irqs.interrupt[2] = resources->irqs->interrupt[2];
+			irqs.interrupt[3] = resources->irqs->interrupt[3];
+			irqs.valid_INT = resources->irqs->valid_INT;
+		}
+
+		/* set up resource lists that are now aligned on top and bottom
+		 * for anything behind the bridge. */
+		temp_resources.bus_head = bus_node;
+		temp_resources.io_head = io_node;
+		temp_resources.mem_head = mem_node;
+		temp_resources.p_mem_head = p_mem_node;
+		temp_resources.irqs = &irqs;
+
+		/* Make copies of the nodes we are going to pass down so that
+		 * if there is a problem,we can just use these to free resources
+		 */
+		hold_bus_node = kmalloc(sizeof(*hold_bus_node), GFP_KERNEL);
+		hold_IO_node = kmalloc(sizeof(*hold_IO_node), GFP_KERNEL);
+		hold_mem_node = kmalloc(sizeof(*hold_mem_node), GFP_KERNEL);
+		hold_p_mem_node = kmalloc(sizeof(*hold_p_mem_node), GFP_KERNEL);
+
+		if (!hold_bus_node || !hold_IO_node || !hold_mem_node || !hold_p_mem_node) {
+			kfree(hold_bus_node);
+			kfree(hold_IO_node);
+			kfree(hold_mem_node);
+			kfree(hold_p_mem_node);
+
+			return 1;
+		}
+
+		memcpy(hold_bus_node, bus_node, sizeof(struct pci_resource));
+
+		bus_node->base += 1;
+		bus_node->length -= 1;
+		bus_node->next = NULL;
+
+		/* If we have IO resources copy them and fill in the bridge's
+		 * IO range registers */
+		memcpy(hold_IO_node, io_node, sizeof(struct pci_resource));
+		io_node->next = NULL;
+
+		/* set IO base and Limit registers */
+		temp_byte = io_node->base >> 8;
+		rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_IO_BASE, temp_byte);
+
+		temp_byte = (io_node->base + io_node->length - 1) >> 8;
+		rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_IO_LIMIT, temp_byte);
+
+		/* Copy the memory resources and fill in the bridge's memory
+		 * range registers.
+		 */
+		memcpy(hold_mem_node, mem_node, sizeof(struct pci_resource));
+		mem_node->next = NULL;
+
+		/* set Mem base and Limit registers */
+		temp_word = mem_node->base >> 16;
+		rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_BASE, temp_word);
+
+		temp_word = (mem_node->base + mem_node->length - 1) >> 16;
+		rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word);
+
+		memcpy(hold_p_mem_node, p_mem_node, sizeof(struct pci_resource));
+		p_mem_node->next = NULL;
+
+		/* set Pre Mem base and Limit registers */
+		temp_word = p_mem_node->base >> 16;
+		rc = pci_bus_write_config_word(pci_bus, devfn, PCI_PREF_MEMORY_BASE, temp_word);
+
+		temp_word = (p_mem_node->base + p_mem_node->length - 1) >> 16;
+		rc = pci_bus_write_config_word(pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word);
+
+		/* Adjust this to compensate for extra adjustment in first loop
+		 */
+		irqs.barber_pole--;
+
+		rc = 0;
+
+		/* Here we actually find the devices and configure them */
+		for (device = 0; (device <= 0x1F) && !rc; device++) {
+			irqs.barber_pole = (irqs.barber_pole + 1) & 0x03;
+
+			ID = 0xFFFFFFFF;
+			pci_bus->number = hold_bus_node->base;
+			pci_bus_read_config_dword(pci_bus, PCI_DEVFN(device, 0), 0x00, &ID);
+			pci_bus->number = func->bus;
+
+			if (!PCI_POSSIBLE_ERROR(ID)) {	  /*  device present */
+				/* Setup slot structure. */
+				new_slot = cpqhp_slot_create(hold_bus_node->base);
+
+				if (new_slot == NULL) {
+					rc = -ENOMEM;
+					continue;
+				}
+
+				new_slot->bus = hold_bus_node->base;
+				new_slot->device = device;
+				new_slot->function = 0;
+				new_slot->is_a_board = 1;
+				new_slot->status = 0;
+
+				rc = configure_new_device(ctrl, new_slot, 1, &temp_resources);
+				dbg("configure_new_device rc=0x%x\n", rc);
+			}	/* End of IF (device in slot?) */
+		}		/* End of FOR loop */
+
+		if (rc)
+			goto free_and_out;
+		/* save the interrupt routing information */
+		if (resources->irqs) {
+			resources->irqs->interrupt[0] = irqs.interrupt[0];
+			resources->irqs->interrupt[1] = irqs.interrupt[1];
+			resources->irqs->interrupt[2] = irqs.interrupt[2];
+			resources->irqs->interrupt[3] = irqs.interrupt[3];
+			resources->irqs->valid_INT = irqs.valid_INT;
+		} else if (!behind_bridge) {
+			/* We need to hook up the interrupts here */
+			for (cloop = 0; cloop < 4; cloop++) {
+				if (irqs.valid_INT & (0x01 << cloop)) {
+					rc = cpqhp_set_irq(func->bus, func->device,
+							   cloop + 1, irqs.interrupt[cloop]);
+					if (rc)
+						goto free_and_out;
+				}
+			}	/* end of for loop */
+		}
+		/* Return unused bus resources
+		 * First use the temporary node to store information for
+		 * the board */
+		if (bus_node && temp_resources.bus_head) {
+			hold_bus_node->length = bus_node->base - hold_bus_node->base;
+
+			hold_bus_node->next = func->bus_head;
+			func->bus_head = hold_bus_node;
+
+			temp_byte = temp_resources.bus_head->base - 1;
+
+			/* set subordinate bus */
+			rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SUBORDINATE_BUS, temp_byte);
+
+			if (temp_resources.bus_head->length == 0) {
+				kfree(temp_resources.bus_head);
+				temp_resources.bus_head = NULL;
+			} else {
+				return_resource(&(resources->bus_head), temp_resources.bus_head);
+			}
+		}
+
+		/* If we have IO space available and there is some left,
+		 * return the unused portion */
+		if (hold_IO_node && temp_resources.io_head) {
+			io_node = do_pre_bridge_resource_split(&(temp_resources.io_head),
+							       &hold_IO_node, 0x1000);
+
+			/* Check if we were able to split something off */
+			if (io_node) {
+				hold_IO_node->base = io_node->base + io_node->length;
+
+				temp_byte = (hold_IO_node->base) >> 8;
+				rc = pci_bus_write_config_word(pci_bus, devfn, PCI_IO_BASE, temp_byte);
+
+				return_resource(&(resources->io_head), io_node);
+			}
+
+			io_node = do_bridge_resource_split(&(temp_resources.io_head), 0x1000);
+
+			/* Check if we were able to split something off */
+			if (io_node) {
+				/* First use the temporary node to store
+				 * information for the board */
+				hold_IO_node->length = io_node->base - hold_IO_node->base;
+
+				/* If we used any, add it to the board's list */
+				if (hold_IO_node->length) {
+					hold_IO_node->next = func->io_head;
+					func->io_head = hold_IO_node;
+
+					temp_byte = (io_node->base - 1) >> 8;
+					rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_IO_LIMIT, temp_byte);
+
+					return_resource(&(resources->io_head), io_node);
+				} else {
+					/* it doesn't need any IO */
+					temp_word = 0x0000;
+					rc = pci_bus_write_config_word(pci_bus, devfn, PCI_IO_LIMIT, temp_word);
+
+					return_resource(&(resources->io_head), io_node);
+					kfree(hold_IO_node);
+				}
+			} else {
+				/* it used most of the range */
+				hold_IO_node->next = func->io_head;
+				func->io_head = hold_IO_node;
+			}
+		} else if (hold_IO_node) {
+			/* it used the whole range */
+			hold_IO_node->next = func->io_head;
+			func->io_head = hold_IO_node;
+		}
+		/* If we have memory space available and there is some left,
+		 * return the unused portion */
+		if (hold_mem_node && temp_resources.mem_head) {
+			mem_node = do_pre_bridge_resource_split(&(temp_resources.  mem_head),
+								&hold_mem_node, 0x100000);
+
+			/* Check if we were able to split something off */
+			if (mem_node) {
+				hold_mem_node->base = mem_node->base + mem_node->length;
+
+				temp_word = (hold_mem_node->base) >> 16;
+				rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_BASE, temp_word);
+
+				return_resource(&(resources->mem_head), mem_node);
+			}
+
+			mem_node = do_bridge_resource_split(&(temp_resources.mem_head), 0x100000);
+
+			/* Check if we were able to split something off */
+			if (mem_node) {
+				/* First use the temporary node to store
+				 * information for the board */
+				hold_mem_node->length = mem_node->base - hold_mem_node->base;
+
+				if (hold_mem_node->length) {
+					hold_mem_node->next = func->mem_head;
+					func->mem_head = hold_mem_node;
+
+					/* configure end address */
+					temp_word = (mem_node->base - 1) >> 16;
+					rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word);
+
+					/* Return unused resources to the pool */
+					return_resource(&(resources->mem_head), mem_node);
+				} else {
+					/* it doesn't need any Mem */
+					temp_word = 0x0000;
+					rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word);
+
+					return_resource(&(resources->mem_head), mem_node);
+					kfree(hold_mem_node);
+				}
+			} else {
+				/* it used most of the range */
+				hold_mem_node->next = func->mem_head;
+				func->mem_head = hold_mem_node;
+			}
+		} else if (hold_mem_node) {
+			/* it used the whole range */
+			hold_mem_node->next = func->mem_head;
+			func->mem_head = hold_mem_node;
+		}
+		/* If we have prefetchable memory space available and there
+		 * is some left at the end, return the unused portion */
+		if (temp_resources.p_mem_head) {
+			p_mem_node = do_pre_bridge_resource_split(&(temp_resources.p_mem_head),
+								  &hold_p_mem_node, 0x100000);
+
+			/* Check if we were able to split something off */
+			if (p_mem_node) {
+				hold_p_mem_node->base = p_mem_node->base + p_mem_node->length;
+
+				temp_word = (hold_p_mem_node->base) >> 16;
+				rc = pci_bus_write_config_word(pci_bus, devfn, PCI_PREF_MEMORY_BASE, temp_word);
+
+				return_resource(&(resources->p_mem_head), p_mem_node);
+			}
+
+			p_mem_node = do_bridge_resource_split(&(temp_resources.p_mem_head), 0x100000);
+
+			/* Check if we were able to split something off */
+			if (p_mem_node) {
+				/* First use the temporary node to store
+				 * information for the board */
+				hold_p_mem_node->length = p_mem_node->base - hold_p_mem_node->base;
+
+				/* If we used any, add it to the board's list */
+				if (hold_p_mem_node->length) {
+					hold_p_mem_node->next = func->p_mem_head;
+					func->p_mem_head = hold_p_mem_node;
+
+					temp_word = (p_mem_node->base - 1) >> 16;
+					rc = pci_bus_write_config_word(pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word);
+
+					return_resource(&(resources->p_mem_head), p_mem_node);
+				} else {
+					/* it doesn't need any PMem */
+					temp_word = 0x0000;
+					rc = pci_bus_write_config_word(pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word);
+
+					return_resource(&(resources->p_mem_head), p_mem_node);
+					kfree(hold_p_mem_node);
+				}
+			} else {
+				/* it used the most of the range */
+				hold_p_mem_node->next = func->p_mem_head;
+				func->p_mem_head = hold_p_mem_node;
+			}
+		} else if (hold_p_mem_node) {
+			/* it used the whole range */
+			hold_p_mem_node->next = func->p_mem_head;
+			func->p_mem_head = hold_p_mem_node;
+		}
+		/* We should be configuring an IRQ and the bridge's base address
+		 * registers if it needs them.  Although we have never seen such
+		 * a device */
+
+		/* enable card */
+		command = 0x0157;	/* = PCI_COMMAND_IO |
+					 *   PCI_COMMAND_MEMORY |
+					 *   PCI_COMMAND_MASTER |
+					 *   PCI_COMMAND_INVALIDATE |
+					 *   PCI_COMMAND_PARITY |
+					 *   PCI_COMMAND_SERR */
+		rc = pci_bus_write_config_word(pci_bus, devfn, PCI_COMMAND, command);
+
+		/* set Bridge Control Register */
+		command = 0x07;		/* = PCI_BRIDGE_CTL_PARITY |
+					 *   PCI_BRIDGE_CTL_SERR |
+					 *   PCI_BRIDGE_CTL_NO_ISA */
+		rc = pci_bus_write_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, command);
+	} else if ((temp_byte & 0x7F) == PCI_HEADER_TYPE_NORMAL) {
+		/* Standard device */
+		rc = pci_bus_read_config_byte(pci_bus, devfn, 0x0B, &class_code);
+
+		if (class_code == PCI_BASE_CLASS_DISPLAY) {
+			/* Display (video) adapter (not supported) */
+			return DEVICE_TYPE_NOT_SUPPORTED;
+		}
+		/* Figure out IO and memory needs */
+		for (cloop = 0x10; cloop <= 0x24; cloop += 4) {
+			temp_register = 0xFFFFFFFF;
+
+			dbg("CND: bus=%d, devfn=%d, offset=%d\n", pci_bus->number, devfn, cloop);
+			rc = pci_bus_write_config_dword(pci_bus, devfn, cloop, temp_register);
+
+			rc = pci_bus_read_config_dword(pci_bus, devfn, cloop, &temp_register);
+			dbg("CND: base = 0x%x\n", temp_register);
+
+			if (temp_register) {	  /* If this register is implemented */
+				if ((temp_register & 0x03L) == 0x01) {
+					/* Map IO */
+
+					/* set base = amount of IO space */
+					base = temp_register & 0xFFFFFFFC;
+					base = ~base + 1;
+
+					dbg("CND:      length = 0x%x\n", base);
+					io_node = get_io_resource(&(resources->io_head), base);
+					if (!io_node)
+						return -ENOMEM;
+					dbg("Got io_node start = %8.8x, length = %8.8x next (%p)\n",
+					    io_node->base, io_node->length, io_node->next);
+					dbg("func (%p) io_head (%p)\n", func, func->io_head);
+
+					/* allocate the resource to the board */
+					base = io_node->base;
+					io_node->next = func->io_head;
+					func->io_head = io_node;
+				} else if ((temp_register & 0x0BL) == 0x08) {
+					/* Map prefetchable memory */
+					base = temp_register & 0xFFFFFFF0;
+					base = ~base + 1;
+
+					dbg("CND:      length = 0x%x\n", base);
+					p_mem_node = get_resource(&(resources->p_mem_head), base);
+
+					/* allocate the resource to the board */
+					if (p_mem_node) {
+						base = p_mem_node->base;
+
+						p_mem_node->next = func->p_mem_head;
+						func->p_mem_head = p_mem_node;
+					} else
+						return -ENOMEM;
+				} else if ((temp_register & 0x0BL) == 0x00) {
+					/* Map memory */
+					base = temp_register & 0xFFFFFFF0;
+					base = ~base + 1;
+
+					dbg("CND:      length = 0x%x\n", base);
+					mem_node = get_resource(&(resources->mem_head), base);
+
+					/* allocate the resource to the board */
+					if (mem_node) {
+						base = mem_node->base;
+
+						mem_node->next = func->mem_head;
+						func->mem_head = mem_node;
+					} else
+						return -ENOMEM;
+				} else {
+					/* Reserved bits or requesting space below 1M */
+					return NOT_ENOUGH_RESOURCES;
+				}
+
+				rc = pci_bus_write_config_dword(pci_bus, devfn, cloop, base);
+
+				/* Check for 64-bit base */
+				if ((temp_register & 0x07L) == 0x04) {
+					cloop += 4;
+
+					/* Upper 32 bits of address always zero
+					 * on today's systems */
+					/* FIXME this is probably not true on
+					 * Alpha and ia64??? */
+					base = 0;
+					rc = pci_bus_write_config_dword(pci_bus, devfn, cloop, base);
+				}
+			}
+		}		/* End of base register loop */
+		if (cpqhp_legacy_mode) {
+			/* Figure out which interrupt pin this function uses */
+			rc = pci_bus_read_config_byte(pci_bus, devfn,
+				PCI_INTERRUPT_PIN, &temp_byte);
+
+			/* If this function needs an interrupt and we are behind
+			 * a bridge and the pin is tied to something that's
+			 * already mapped, set this one the same */
+			if (temp_byte && resources->irqs &&
+			    (resources->irqs->valid_INT &
+			     (0x01 << ((temp_byte + resources->irqs->barber_pole - 1) & 0x03)))) {
+				/* We have to share with something already set up */
+				IRQ = resources->irqs->interrupt[(temp_byte +
+					resources->irqs->barber_pole - 1) & 0x03];
+			} else {
+				/* Program IRQ based on card type */
+				rc = pci_bus_read_config_byte(pci_bus, devfn, 0x0B, &class_code);
+
+				if (class_code == PCI_BASE_CLASS_STORAGE)
+					IRQ = cpqhp_disk_irq;
+				else
+					IRQ = cpqhp_nic_irq;
+			}
+
+			/* IRQ Line */
+			rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_INTERRUPT_LINE, IRQ);
+		}
+
+		if (!behind_bridge) {
+			rc = cpqhp_set_irq(func->bus, func->device, temp_byte, IRQ);
+			if (rc)
+				return 1;
+		} else {
+			/* TBD - this code may also belong in the other clause
+			 * of this If statement */
+			resources->irqs->interrupt[(temp_byte + resources->irqs->barber_pole - 1) & 0x03] = IRQ;
+			resources->irqs->valid_INT |= 0x01 << (temp_byte + resources->irqs->barber_pole - 1) & 0x03;
+		}
+
+		/* Latency Timer */
+		temp_byte = 0x40;
+		rc = pci_bus_write_config_byte(pci_bus, devfn,
+					PCI_LATENCY_TIMER, temp_byte);
+
+		/* Cache Line size */
+		temp_byte = 0x08;
+		rc = pci_bus_write_config_byte(pci_bus, devfn,
+					PCI_CACHE_LINE_SIZE, temp_byte);
+
+		/* disable ROM base Address */
+		temp_dword = 0x00L;
+		rc = pci_bus_write_config_word(pci_bus, devfn,
+					PCI_ROM_ADDRESS, temp_dword);
+
+		/* enable card */
+		temp_word = 0x0157;	/* = PCI_COMMAND_IO |
+					 *   PCI_COMMAND_MEMORY |
+					 *   PCI_COMMAND_MASTER |
+					 *   PCI_COMMAND_INVALIDATE |
+					 *   PCI_COMMAND_PARITY |
+					 *   PCI_COMMAND_SERR */
+		rc = pci_bus_write_config_word(pci_bus, devfn,
+					PCI_COMMAND, temp_word);
+	} else {		/* End of Not-A-Bridge else */
+		/* It's some strange type of PCI adapter (Cardbus?) */
+		return DEVICE_TYPE_NOT_SUPPORTED;
+	}
+
+	func->configured = 1;
+
+	return 0;
+free_and_out:
+	cpqhp_destroy_resource_list(&temp_resources);
+
+	return_resource(&(resources->bus_head), hold_bus_node);
+	return_resource(&(resources->io_head), hold_IO_node);
+	return_resource(&(resources->mem_head), hold_mem_node);
+	return_resource(&(resources->p_mem_head), hold_p_mem_node);
+	return rc;
+}