Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1275 insertions, 0 deletions

diff --git a/drivers/pci/hotplug/ibmphp_ebda.c b/drivers/pci/hotplug/ibmphp_ebda.c
new file mode 100644
index 00000000000..aea1187c73a
--- /dev/null
+++ b/drivers/pci/hotplug/ibmphp_ebda.c
@@ -0,0 +1,1275 @@
+/*
+ * IBM Hot Plug Controller Driver
+ *
+ * Written By: Tong Yu, IBM Corporation
+ *
+ * Copyright (C) 2001,2003 Greg Kroah-Hartman (greg@kroah.com)
+ * Copyright (C) 2001-2003 IBM Corp.
+ *
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT.  See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Send feedback to <gregkh@us.ibm.com>
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <linux/list.h>
+#include <linux/init.h>
+#include "ibmphp.h"
+
+/*
+ * POST builds data blocks(in this data block definition, a char-1
+ * byte, short(or word)-2 byte, long(dword)-4 byte) in the Extended
+ * BIOS Data Area which describe the configuration of the hot-plug
+ * controllers and resources used by the PCI Hot-Plug devices.
+ *
+ * This file walks EBDA, maps data block from physical addr,
+ * reconstruct linked lists about all system resource(MEM, PFM, IO)
+ * already assigned by POST, as well as linked lists about hot plug
+ * controllers (ctlr#, slot#, bus&slot features...)
+ */
+
+/* Global lists */
+LIST_HEAD (ibmphp_ebda_pci_rsrc_head);
+LIST_HEAD (ibmphp_slot_head);
+
+/* Local variables */
+static struct ebda_hpc_list *hpc_list_ptr;
+static struct ebda_rsrc_list *rsrc_list_ptr;
+static struct rio_table_hdr *rio_table_ptr = NULL;
+static LIST_HEAD (ebda_hpc_head);
+static LIST_HEAD (bus_info_head);
+static LIST_HEAD (rio_vg_head);
+static LIST_HEAD (rio_lo_head);
+static LIST_HEAD (opt_vg_head);
+static LIST_HEAD (opt_lo_head);
+static void __iomem *io_mem;
+
+/* Local functions */
+static int ebda_rsrc_controller (void);
+static int ebda_rsrc_rsrc (void);
+static int ebda_rio_table (void);
+
+static struct ebda_hpc_list * __init alloc_ebda_hpc_list (void)
+{
+	struct ebda_hpc_list *list;
+
+	list = kmalloc (sizeof (struct ebda_hpc_list), GFP_KERNEL);
+	if (!list)
+		return NULL;
+	memset (list, 0, sizeof (*list));
+	return list;
+}
+
+static struct controller *alloc_ebda_hpc (u32 slot_count, u32 bus_count)
+{
+	struct controller *controller;
+	struct ebda_hpc_slot *slots;
+	struct ebda_hpc_bus *buses;
+
+	controller = kmalloc (sizeof (struct controller), GFP_KERNEL);
+	if (!controller)
+		goto error;
+	memset (controller, 0, sizeof (*controller));
+
+	slots = kmalloc (sizeof (struct ebda_hpc_slot) * slot_count, GFP_KERNEL);
+	if (!slots)
+		goto error_contr;
+	memset (slots, 0, sizeof (*slots) * slot_count);
+	controller->slots = slots;
+
+	buses = kmalloc (sizeof (struct ebda_hpc_bus) * bus_count, GFP_KERNEL);
+	if (!buses)
+		goto error_slots;
+	memset (buses, 0, sizeof (*buses) * bus_count);
+	controller->buses = buses;
+
+	return controller;
+error_slots:
+	kfree(controller->slots);
+error_contr:
+	kfree(controller);
+error:
+	return NULL;
+}
+
+static void free_ebda_hpc (struct controller *controller)
+{
+	kfree (controller->slots);
+	kfree (controller->buses);
+	kfree (controller);
+}
+
+static struct ebda_rsrc_list * __init alloc_ebda_rsrc_list (void)
+{
+	struct ebda_rsrc_list *list;
+
+	list = kmalloc (sizeof (struct ebda_rsrc_list), GFP_KERNEL);
+	if (!list)
+		return NULL;
+	memset (list, 0, sizeof (*list));
+	return list;
+}
+
+static struct ebda_pci_rsrc *alloc_ebda_pci_rsrc (void)
+{
+	struct ebda_pci_rsrc *resource;
+
+	resource = kmalloc (sizeof (struct ebda_pci_rsrc), GFP_KERNEL);
+	if (!resource)
+		return NULL;
+	memset (resource, 0, sizeof (*resource));
+	return resource;
+}
+
+static void __init print_bus_info (void)
+{
+	struct bus_info *ptr;
+	struct list_head *ptr1;
+	
+	list_for_each (ptr1, &bus_info_head) {
+		ptr = list_entry (ptr1, struct bus_info, bus_info_list);
+		debug ("%s - slot_min = %x\n", __FUNCTION__, ptr->slot_min);
+		debug ("%s - slot_max = %x\n", __FUNCTION__, ptr->slot_max);
+		debug ("%s - slot_count = %x\n", __FUNCTION__, ptr->slot_count);
+		debug ("%s - bus# = %x\n", __FUNCTION__, ptr->busno);
+		debug ("%s - current_speed = %x\n", __FUNCTION__, ptr->current_speed);
+		debug ("%s - controller_id = %x\n", __FUNCTION__, ptr->controller_id);
+		
+		debug ("%s - slots_at_33_conv = %x\n", __FUNCTION__, ptr->slots_at_33_conv);
+		debug ("%s - slots_at_66_conv = %x\n", __FUNCTION__, ptr->slots_at_66_conv);
+		debug ("%s - slots_at_66_pcix = %x\n", __FUNCTION__, ptr->slots_at_66_pcix);
+		debug ("%s - slots_at_100_pcix = %x\n", __FUNCTION__, ptr->slots_at_100_pcix);
+		debug ("%s - slots_at_133_pcix = %x\n", __FUNCTION__, ptr->slots_at_133_pcix);
+
+	}
+}
+
+static void print_lo_info (void)
+{
+	struct rio_detail *ptr;
+	struct list_head *ptr1;
+	debug ("print_lo_info ----\n");	
+	list_for_each (ptr1, &rio_lo_head) {
+		ptr = list_entry (ptr1, struct rio_detail, rio_detail_list);
+		debug ("%s - rio_node_id = %x\n", __FUNCTION__, ptr->rio_node_id);
+		debug ("%s - rio_type = %x\n", __FUNCTION__, ptr->rio_type);
+		debug ("%s - owner_id = %x\n", __FUNCTION__, ptr->owner_id);
+		debug ("%s - first_slot_num = %x\n", __FUNCTION__, ptr->first_slot_num);
+		debug ("%s - wpindex = %x\n", __FUNCTION__, ptr->wpindex);
+		debug ("%s - chassis_num = %x\n", __FUNCTION__, ptr->chassis_num);
+
+	}
+}
+
+static void print_vg_info (void)
+{
+	struct rio_detail *ptr;
+	struct list_head *ptr1;
+	debug ("%s ---\n", __FUNCTION__);
+	list_for_each (ptr1, &rio_vg_head) {
+		ptr = list_entry (ptr1, struct rio_detail, rio_detail_list);
+		debug ("%s - rio_node_id = %x\n", __FUNCTION__, ptr->rio_node_id);
+		debug ("%s - rio_type = %x\n", __FUNCTION__, ptr->rio_type);
+		debug ("%s - owner_id = %x\n", __FUNCTION__, ptr->owner_id);
+		debug ("%s - first_slot_num = %x\n", __FUNCTION__, ptr->first_slot_num);
+		debug ("%s - wpindex = %x\n", __FUNCTION__, ptr->wpindex);
+		debug ("%s - chassis_num = %x\n", __FUNCTION__, ptr->chassis_num);
+
+	}
+}
+
+static void __init print_ebda_pci_rsrc (void)
+{
+	struct ebda_pci_rsrc *ptr;
+	struct list_head *ptr1;
+
+	list_for_each (ptr1, &ibmphp_ebda_pci_rsrc_head) {
+		ptr = list_entry (ptr1, struct ebda_pci_rsrc, ebda_pci_rsrc_list);
+		debug ("%s - rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n", 
+			__FUNCTION__, ptr->rsrc_type ,ptr->bus_num, ptr->dev_fun,ptr->start_addr, ptr->end_addr);
+	}
+}
+
+static void __init print_ibm_slot (void)
+{
+	struct slot *ptr;
+	struct list_head *ptr1;
+
+	list_for_each (ptr1, &ibmphp_slot_head) {
+		ptr = list_entry (ptr1, struct slot, ibm_slot_list);
+		debug ("%s - slot_number: %x\n", __FUNCTION__, ptr->number); 
+	}
+}
+
+static void __init print_opt_vg (void)
+{
+	struct opt_rio *ptr;
+	struct list_head *ptr1;
+	debug ("%s ---\n", __FUNCTION__);
+	list_for_each (ptr1, &opt_vg_head) {
+		ptr = list_entry (ptr1, struct opt_rio, opt_rio_list);
+		debug ("%s - rio_type %x\n", __FUNCTION__, ptr->rio_type); 
+		debug ("%s - chassis_num: %x\n", __FUNCTION__, ptr->chassis_num); 
+		debug ("%s - first_slot_num: %x\n", __FUNCTION__, ptr->first_slot_num); 
+		debug ("%s - middle_num: %x\n", __FUNCTION__, ptr->middle_num); 
+	}
+}
+
+static void __init print_ebda_hpc (void)
+{
+	struct controller *hpc_ptr;
+	struct list_head *ptr1;
+	u16 index;
+
+	list_for_each (ptr1, &ebda_hpc_head) {
+
+		hpc_ptr = list_entry (ptr1, struct controller, ebda_hpc_list); 
+
+		for (index = 0; index < hpc_ptr->slot_count; index++) {
+			debug ("%s - physical slot#: %x\n", __FUNCTION__, hpc_ptr->slots[index].slot_num);
+			debug ("%s - pci bus# of the slot: %x\n", __FUNCTION__, hpc_ptr->slots[index].slot_bus_num);
+			debug ("%s - index into ctlr addr: %x\n", __FUNCTION__, hpc_ptr->slots[index].ctl_index);
+			debug ("%s - cap of the slot: %x\n", __FUNCTION__, hpc_ptr->slots[index].slot_cap);
+		}
+
+		for (index = 0; index < hpc_ptr->bus_count; index++) {
+			debug ("%s - bus# of each bus controlled by this ctlr: %x\n", __FUNCTION__, hpc_ptr->buses[index].bus_num);
+		}
+
+		debug ("%s - type of hpc: %x\n", __FUNCTION__, hpc_ptr->ctlr_type);
+		switch (hpc_ptr->ctlr_type) {
+		case 1:
+			debug ("%s - bus: %x\n", __FUNCTION__, hpc_ptr->u.pci_ctlr.bus);
+			debug ("%s - dev_fun: %x\n", __FUNCTION__, hpc_ptr->u.pci_ctlr.dev_fun);
+			debug ("%s - irq: %x\n", __FUNCTION__, hpc_ptr->irq);
+			break;
+
+		case 0:
+			debug ("%s - io_start: %x\n", __FUNCTION__, hpc_ptr->u.isa_ctlr.io_start);
+			debug ("%s - io_end: %x\n", __FUNCTION__, hpc_ptr->u.isa_ctlr.io_end);
+			debug ("%s - irq: %x\n", __FUNCTION__, hpc_ptr->irq);
+			break;
+
+		case 2:
+		case 4:
+			debug ("%s - wpegbbar: %lx\n", __FUNCTION__, hpc_ptr->u.wpeg_ctlr.wpegbbar);
+			debug ("%s - i2c_addr: %x\n", __FUNCTION__, hpc_ptr->u.wpeg_ctlr.i2c_addr);
+			debug ("%s - irq: %x\n", __FUNCTION__, hpc_ptr->irq);
+			break;
+		}
+	}
+}
+
+int __init ibmphp_access_ebda (void)
+{
+	u8 format, num_ctlrs, rio_complete, hs_complete;
+	u16 ebda_seg, num_entries, next_offset, offset, blk_id, sub_addr, re, rc_id, re_id, base;
+	int rc = 0;
+
+
+	rio_complete = 0;
+	hs_complete = 0;
+
+	io_mem = ioremap ((0x40 << 4) + 0x0e, 2);
+	if (!io_mem )
+		return -ENOMEM;
+	ebda_seg = readw (io_mem);
+	iounmap (io_mem);
+	debug ("returned ebda segment: %x\n", ebda_seg);
+	
+	io_mem = ioremap (ebda_seg<<4, 65000);
+	if (!io_mem )
+		return -ENOMEM;
+	next_offset = 0x180;
+
+	for (;;) {
+		offset = next_offset;
+		next_offset = readw (io_mem + offset);	/* offset of next blk */
+
+		offset += 2;
+		if (next_offset == 0)	/* 0 indicate it's last blk */
+			break;
+		blk_id = readw (io_mem + offset);	/* this blk id */
+
+		offset += 2;
+		/* check if it is hot swap block or rio block */
+		if (blk_id != 0x4853 && blk_id != 0x4752)
+			continue;
+		/* found hs table */
+		if (blk_id == 0x4853) {
+			debug ("now enter hot swap block---\n");
+			debug ("hot blk id: %x\n", blk_id);
+			format = readb (io_mem + offset);
+
+			offset += 1;
+			if (format != 4)
+				goto error_nodev;
+			debug ("hot blk format: %x\n", format);
+			/* hot swap sub blk */
+			base = offset;
+
+			sub_addr = base;
+			re = readw (io_mem + sub_addr);	/* next sub blk */
+
+			sub_addr += 2;
+			rc_id = readw (io_mem + sub_addr); 	/* sub blk id */
+
+			sub_addr += 2;
+			if (rc_id != 0x5243)
+				goto error_nodev;
+			/* rc sub blk signature  */
+			num_ctlrs = readb (io_mem + sub_addr);
+
+			sub_addr += 1;
+			hpc_list_ptr = alloc_ebda_hpc_list ();
+			if (!hpc_list_ptr) {
+				rc = -ENOMEM;
+				goto out;
+			}
+			hpc_list_ptr->format = format;
+			hpc_list_ptr->num_ctlrs = num_ctlrs;
+			hpc_list_ptr->phys_addr = sub_addr;	/*  offset of RSRC_CONTROLLER blk */
+			debug ("info about hpc descriptor---\n");
+			debug ("hot blk format: %x\n", format);
+			debug ("num of controller: %x\n", num_ctlrs);
+			debug ("offset of hpc data structure enteries: %x\n ", sub_addr);
+
+			sub_addr = base + re;	/* re sub blk */
+			/* FIXME: rc is never used/checked */
+			rc = readw (io_mem + sub_addr);	/* next sub blk */
+
+			sub_addr += 2;
+			re_id = readw (io_mem + sub_addr);	/* sub blk id */
+
+			sub_addr += 2;
+			if (re_id != 0x5245)
+				goto error_nodev;
+
+			/* signature of re */
+			num_entries = readw (io_mem + sub_addr);
+
+			sub_addr += 2;	/* offset of RSRC_ENTRIES blk */
+			rsrc_list_ptr = alloc_ebda_rsrc_list ();
+			if (!rsrc_list_ptr ) {
+				rc = -ENOMEM;
+				goto out;
+			}
+			rsrc_list_ptr->format = format;
+			rsrc_list_ptr->num_entries = num_entries;
+			rsrc_list_ptr->phys_addr = sub_addr;
+
+			debug ("info about rsrc descriptor---\n");
+			debug ("format: %x\n", format);
+			debug ("num of rsrc: %x\n", num_entries);
+			debug ("offset of rsrc data structure enteries: %x\n ", sub_addr);
+
+			hs_complete = 1;
+		} else {
+		/* found rio table, blk_id == 0x4752 */
+			debug ("now enter io table ---\n");
+			debug ("rio blk id: %x\n", blk_id);
+
+			rio_table_ptr = kmalloc (sizeof (struct rio_table_hdr), GFP_KERNEL);
+			if (!rio_table_ptr)
+				return -ENOMEM; 
+			memset (rio_table_ptr, 0, sizeof (struct rio_table_hdr) );
+			rio_table_ptr->ver_num = readb (io_mem + offset);
+			rio_table_ptr->scal_count = readb (io_mem + offset + 1);
+			rio_table_ptr->riodev_count = readb (io_mem + offset + 2);
+			rio_table_ptr->offset = offset +3 ;
+			
+			debug("info about rio table hdr ---\n");
+			debug("ver_num: %x\nscal_count: %x\nriodev_count: %x\noffset of rio table: %x\n ",
+				rio_table_ptr->ver_num, rio_table_ptr->scal_count,
+				rio_table_ptr->riodev_count, rio_table_ptr->offset);
+
+			rio_complete = 1;
+		}
+	}
+
+	if (!hs_complete && !rio_complete)
+		goto error_nodev;
+
+	if (rio_table_ptr) {
+		if (rio_complete && rio_table_ptr->ver_num == 3) {
+			rc = ebda_rio_table ();
+			if (rc)
+				goto out;
+		}
+	}
+	rc = ebda_rsrc_controller ();
+	if (rc)
+		goto out;
+
+	rc = ebda_rsrc_rsrc ();
+	goto out;
+error_nodev:
+	rc = -ENODEV;
+out:
+	iounmap (io_mem);
+	return rc;
+}
+
+/*
+ * map info of scalability details and rio details from physical address
+ */
+static int __init ebda_rio_table (void)
+{
+	u16 offset;
+	u8 i;
+	struct rio_detail *rio_detail_ptr;
+
+	offset = rio_table_ptr->offset;
+	offset += 12 * rio_table_ptr->scal_count;
+
+	// we do concern about rio details
+	for (i = 0; i < rio_table_ptr->riodev_count; i++) {
+		rio_detail_ptr = kmalloc (sizeof (struct rio_detail), GFP_KERNEL);
+		if (!rio_detail_ptr)
+			return -ENOMEM;
+		memset (rio_detail_ptr, 0, sizeof (struct rio_detail));
+		rio_detail_ptr->rio_node_id = readb (io_mem + offset);
+		rio_detail_ptr->bbar = readl (io_mem + offset + 1);
+		rio_detail_ptr->rio_type = readb (io_mem + offset + 5);
+		rio_detail_ptr->owner_id = readb (io_mem + offset + 6);
+		rio_detail_ptr->port0_node_connect = readb (io_mem + offset + 7);
+		rio_detail_ptr->port0_port_connect = readb (io_mem + offset + 8);
+		rio_detail_ptr->port1_node_connect = readb (io_mem + offset + 9);
+		rio_detail_ptr->port1_port_connect = readb (io_mem + offset + 10);
+		rio_detail_ptr->first_slot_num = readb (io_mem + offset + 11);
+		rio_detail_ptr->status = readb (io_mem + offset + 12);
+		rio_detail_ptr->wpindex = readb (io_mem + offset + 13);
+		rio_detail_ptr->chassis_num = readb (io_mem + offset + 14);
+//		debug ("rio_node_id: %x\nbbar: %x\nrio_type: %x\nowner_id: %x\nport0_node: %x\nport0_port: %x\nport1_node: %x\nport1_port: %x\nfirst_slot_num: %x\nstatus: %x\n", rio_detail_ptr->rio_node_id, rio_detail_ptr->bbar, rio_detail_ptr->rio_type, rio_detail_ptr->owner_id, rio_detail_ptr->port0_node_connect, rio_detail_ptr->port0_port_connect, rio_detail_ptr->port1_node_connect, rio_detail_ptr->port1_port_connect, rio_detail_ptr->first_slot_num, rio_detail_ptr->status);
+		//create linked list of chassis
+		if (rio_detail_ptr->rio_type == 4 || rio_detail_ptr->rio_type == 5) 
+			list_add (&rio_detail_ptr->rio_detail_list, &rio_vg_head);
+		//create linked list of expansion box				
+		else if (rio_detail_ptr->rio_type == 6 || rio_detail_ptr->rio_type == 7) 
+			list_add (&rio_detail_ptr->rio_detail_list, &rio_lo_head);
+		else 
+			// not in my concern
+			kfree (rio_detail_ptr);
+		offset += 15;
+	}
+	print_lo_info ();
+	print_vg_info ();
+	return 0;
+}
+
+/*
+ * reorganizing linked list of chassis	 
+ */
+static struct opt_rio *search_opt_vg (u8 chassis_num)
+{
+	struct opt_rio *ptr;
+	struct list_head *ptr1;
+	list_for_each (ptr1, &opt_vg_head) {
+		ptr = list_entry (ptr1, struct opt_rio, opt_rio_list);
+		if (ptr->chassis_num == chassis_num)
+			return ptr;
+	}		
+	return NULL;
+}
+
+static int __init combine_wpg_for_chassis (void)
+{
+	struct opt_rio *opt_rio_ptr = NULL;
+	struct rio_detail *rio_detail_ptr = NULL;
+	struct list_head *list_head_ptr = NULL;
+	
+	list_for_each (list_head_ptr, &rio_vg_head) {
+		rio_detail_ptr = list_entry (list_head_ptr, struct rio_detail, rio_detail_list);
+		opt_rio_ptr = search_opt_vg (rio_detail_ptr->chassis_num);
+		if (!opt_rio_ptr) {
+			opt_rio_ptr = (struct opt_rio *) kmalloc (sizeof (struct opt_rio), GFP_KERNEL);
+			if (!opt_rio_ptr)
+				return -ENOMEM;
+			memset (opt_rio_ptr, 0, sizeof (struct opt_rio));
+			opt_rio_ptr->rio_type = rio_detail_ptr->rio_type;
+			opt_rio_ptr->chassis_num = rio_detail_ptr->chassis_num;
+			opt_rio_ptr->first_slot_num = rio_detail_ptr->first_slot_num;
+			opt_rio_ptr->middle_num = rio_detail_ptr->first_slot_num;
+			list_add (&opt_rio_ptr->opt_rio_list, &opt_vg_head);
+		} else {	
+			opt_rio_ptr->first_slot_num = min (opt_rio_ptr->first_slot_num, rio_detail_ptr->first_slot_num);
+			opt_rio_ptr->middle_num = max (opt_rio_ptr->middle_num, rio_detail_ptr->first_slot_num);
+		}	
+	}
+	print_opt_vg ();
+	return 0;	
+}	
+
+/*
+ * reorgnizing linked list of expansion box	 
+ */
+static struct opt_rio_lo *search_opt_lo (u8 chassis_num)
+{
+	struct opt_rio_lo *ptr;
+	struct list_head *ptr1;
+	list_for_each (ptr1, &opt_lo_head) {
+		ptr = list_entry (ptr1, struct opt_rio_lo, opt_rio_lo_list);
+		if (ptr->chassis_num == chassis_num)
+			return ptr;
+	}		
+	return NULL;
+}
+
+static int combine_wpg_for_expansion (void)
+{
+	struct opt_rio_lo *opt_rio_lo_ptr = NULL;
+	struct rio_detail *rio_detail_ptr = NULL;
+	struct list_head *list_head_ptr = NULL;
+	
+	list_for_each (list_head_ptr, &rio_lo_head) {
+		rio_detail_ptr = list_entry (list_head_ptr, struct rio_detail, rio_detail_list);
+		opt_rio_lo_ptr = search_opt_lo (rio_detail_ptr->chassis_num);
+		if (!opt_rio_lo_ptr) {
+			opt_rio_lo_ptr = (struct opt_rio_lo *) kmalloc (sizeof (struct opt_rio_lo), GFP_KERNEL);
+			if (!opt_rio_lo_ptr)
+				return -ENOMEM;
+			memset (opt_rio_lo_ptr, 0, sizeof (struct opt_rio_lo));
+			opt_rio_lo_ptr->rio_type = rio_detail_ptr->rio_type;
+			opt_rio_lo_ptr->chassis_num = rio_detail_ptr->chassis_num;
+			opt_rio_lo_ptr->first_slot_num = rio_detail_ptr->first_slot_num;
+			opt_rio_lo_ptr->middle_num = rio_detail_ptr->first_slot_num;
+			opt_rio_lo_ptr->pack_count = 1;
+			
+			list_add (&opt_rio_lo_ptr->opt_rio_lo_list, &opt_lo_head);
+		} else {	
+			opt_rio_lo_ptr->first_slot_num = min (opt_rio_lo_ptr->first_slot_num, rio_detail_ptr->first_slot_num);
+			opt_rio_lo_ptr->middle_num = max (opt_rio_lo_ptr->middle_num, rio_detail_ptr->first_slot_num);
+			opt_rio_lo_ptr->pack_count = 2;
+		}	
+	}
+	return 0;	
+}
+	
+
+/* Since we don't know the max slot number per each chassis, hence go
+ * through the list of all chassis to find out the range
+ * Arguments: slot_num, 1st slot number of the chassis we think we are on, 
+ * var (0 = chassis, 1 = expansion box) 
+ */
+static int first_slot_num (u8 slot_num, u8 first_slot, u8 var)
+{
+	struct opt_rio *opt_vg_ptr = NULL;
+	struct opt_rio_lo *opt_lo_ptr = NULL;
+	struct list_head *ptr = NULL;
+	int rc = 0;
+
+	if (!var) {
+		list_for_each (ptr, &opt_vg_head) {
+			opt_vg_ptr = list_entry (ptr, struct opt_rio, opt_rio_list);
+			if ((first_slot < opt_vg_ptr->first_slot_num) && (slot_num >= opt_vg_ptr->first_slot_num)) { 
+				rc = -ENODEV;
+				break;
+			}
+		}
+	} else {
+		list_for_each (ptr, &opt_lo_head) {
+			opt_lo_ptr = list_entry (ptr, struct opt_rio_lo, opt_rio_lo_list);
+			if ((first_slot < opt_lo_ptr->first_slot_num) && (slot_num >= opt_lo_ptr->first_slot_num)) {
+				rc = -ENODEV;
+				break;
+			}
+		}
+	}
+	return rc;
+}
+
+static struct opt_rio_lo * find_rxe_num (u8 slot_num)
+{
+	struct opt_rio_lo *opt_lo_ptr;
+	struct list_head *ptr;
+
+	list_for_each (ptr, &opt_lo_head) {
+		opt_lo_ptr = list_entry (ptr, struct opt_rio_lo, opt_rio_lo_list);
+		//check to see if this slot_num belongs to expansion box
+		if ((slot_num >= opt_lo_ptr->first_slot_num) && (!first_slot_num (slot_num, opt_lo_ptr->first_slot_num, 1))) 
+			return opt_lo_ptr;
+	}
+	return NULL;
+}
+
+static struct opt_rio * find_chassis_num (u8 slot_num)
+{
+	struct opt_rio *opt_vg_ptr;
+	struct list_head *ptr;
+
+	list_for_each (ptr, &opt_vg_head) {
+		opt_vg_ptr = list_entry (ptr, struct opt_rio, opt_rio_list);
+		//check to see if this slot_num belongs to chassis 
+		if ((slot_num >= opt_vg_ptr->first_slot_num) && (!first_slot_num (slot_num, opt_vg_ptr->first_slot_num, 0))) 
+			return opt_vg_ptr;
+	}
+	return NULL;
+}
+
+/* This routine will find out how many slots are in the chassis, so that
+ * the slot numbers for rxe100 would start from 1, and not from 7, or 6 etc
+ */
+static u8 calculate_first_slot (u8 slot_num)
+{
+	u8 first_slot = 1;
+	struct list_head * list;
+	struct slot * slot_cur;
+	
+	list_for_each (list, &ibmphp_slot_head) {
+		slot_cur = list_entry (list, struct slot, ibm_slot_list);
+		if (slot_cur->ctrl) {
+			if ((slot_cur->ctrl->ctlr_type != 4) && (slot_cur->ctrl->ending_slot_num > first_slot) && (slot_num > slot_cur->ctrl->ending_slot_num)) 
+				first_slot = slot_cur->ctrl->ending_slot_num;
+		}
+	}			
+	return first_slot + 1;
+
+}
+static char *create_file_name (struct slot * slot_cur)
+{
+	struct opt_rio *opt_vg_ptr = NULL;
+	struct opt_rio_lo *opt_lo_ptr = NULL;
+	static char str[30];
+	int which = 0; /* rxe = 1, chassis = 0 */
+	u8 number = 1; /* either chassis or rxe # */
+	u8 first_slot = 1;
+	u8 slot_num;
+	u8 flag = 0;
+
+	if (!slot_cur) {
+		err ("Structure passed is empty\n");
+		return NULL;
+	}
+	
+	slot_num = slot_cur->number;
+
+	memset (str, 0, sizeof(str));
+	
+	if (rio_table_ptr) {
+		if (rio_table_ptr->ver_num == 3) {
+			opt_vg_ptr = find_chassis_num (slot_num);
+			opt_lo_ptr = find_rxe_num (slot_num);
+		}
+	}
+	if (opt_vg_ptr) {
+		if (opt_lo_ptr) {
+			if ((slot_num - opt_vg_ptr->first_slot_num) > (slot_num - opt_lo_ptr->first_slot_num)) {
+				number = opt_lo_ptr->chassis_num;
+				first_slot = opt_lo_ptr->first_slot_num;
+				which = 1; /* it is RXE */
+			} else {
+				first_slot = opt_vg_ptr->first_slot_num;
+				number = opt_vg_ptr->chassis_num;
+				which = 0;
+			}
+		} else {
+			first_slot = opt_vg_ptr->first_slot_num;
+			number = opt_vg_ptr->chassis_num;
+			which = 0;
+		}
+		++flag;
+	} else if (opt_lo_ptr) {
+		number = opt_lo_ptr->chassis_num;
+		first_slot = opt_lo_ptr->first_slot_num;
+		which = 1;
+		++flag;
+	} else if (rio_table_ptr) {
+		if (rio_table_ptr->ver_num == 3) {
+			/* if both NULL and we DO have correct RIO table in BIOS */
+			return NULL;
+		}
+	} 
+	if (!flag) {
+		if (slot_cur->ctrl->ctlr_type == 4) {
+			first_slot = calculate_first_slot (slot_num);
+			which = 1;
+		} else {
+			which = 0;
+		}
+	}
+
+	sprintf(str, "%s%dslot%d",
+		which == 0 ? "chassis" : "rxe",
+		number, slot_num - first_slot + 1);
+	return str;
+}
+
+static int fillslotinfo(struct hotplug_slot *hotplug_slot)
+{
+	struct slot *slot;
+	int rc = 0;
+
+	if (!hotplug_slot || !hotplug_slot->private)
+		return -EINVAL;
+
+	slot = hotplug_slot->private;
+	rc = ibmphp_hpc_readslot(slot, READ_ALLSTAT, NULL);
+	if (rc)
+		return rc;
+
+	// power - enabled:1  not:0
+	hotplug_slot->info->power_status = SLOT_POWER(slot->status);
+
+	// attention - off:0, on:1, blinking:2
+	hotplug_slot->info->attention_status = SLOT_ATTN(slot->status, slot->ext_status);
+
+	// latch - open:1 closed:0
+	hotplug_slot->info->latch_status = SLOT_LATCH(slot->status);
+
+	// pci board - present:1 not:0
+	if (SLOT_PRESENT (slot->status))
+		hotplug_slot->info->adapter_status = 1;
+	else
+		hotplug_slot->info->adapter_status = 0;
+/*
+	if (slot->bus_on->supported_bus_mode
+		&& (slot->bus_on->supported_speed == BUS_SPEED_66))
+		hotplug_slot->info->max_bus_speed_status = BUS_SPEED_66PCIX;
+	else
+		hotplug_slot->info->max_bus_speed_status = slot->bus_on->supported_speed;
+*/
+
+	return rc;
+}
+
+static void release_slot(struct hotplug_slot *hotplug_slot)
+{
+	struct slot *slot;
+
+	if (!hotplug_slot || !hotplug_slot->private)
+		return;
+
+	slot = hotplug_slot->private;
+	kfree(slot->hotplug_slot->info);
+	kfree(slot->hotplug_slot->name);
+	kfree(slot->hotplug_slot);
+	slot->ctrl = NULL;
+	slot->bus_on = NULL;
+
+	/* we don't want to actually remove the resources, since free_resources will do just that */
+	ibmphp_unconfigure_card(&slot, -1);
+
+	kfree (slot);
+}
+
+static struct pci_driver ibmphp_driver;
+
+/*
+ * map info (ctlr-id, slot count, slot#.. bus count, bus#, ctlr type...) of
+ * each hpc from physical address to a list of hot plug controllers based on
+ * hpc descriptors.
+ */
+static int __init ebda_rsrc_controller (void)
+{
+	u16 addr, addr_slot, addr_bus;
+	u8 ctlr_id, temp, bus_index;
+	u16 ctlr, slot, bus;
+	u16 slot_num, bus_num, index;
+	struct hotplug_slot *hp_slot_ptr;
+	struct controller *hpc_ptr;
+	struct ebda_hpc_bus *bus_ptr;
+	struct ebda_hpc_slot *slot_ptr;
+	struct bus_info *bus_info_ptr1, *bus_info_ptr2;
+	int rc;
+	struct slot *tmp_slot;
+	struct list_head *list;
+
+	addr = hpc_list_ptr->phys_addr;
+	for (ctlr = 0; ctlr < hpc_list_ptr->num_ctlrs; ctlr++) {
+		bus_index = 1;
+		ctlr_id = readb (io_mem + addr);
+		addr += 1;
+		slot_num = readb (io_mem + addr);
+
+		addr += 1;
+		addr_slot = addr;	/* offset of slot structure */
+		addr += (slot_num * 4);
+
+		bus_num = readb (io_mem + addr);
+
+		addr += 1;
+		addr_bus = addr;	/* offset of bus */
+		addr += (bus_num * 9);	/* offset of ctlr_type */
+		temp = readb (io_mem + addr);
+
+		addr += 1;
+		/* init hpc structure */
+		hpc_ptr = alloc_ebda_hpc (slot_num, bus_num);
+		if (!hpc_ptr ) {
+			rc = -ENOMEM;
+			goto error_no_hpc;
+		}
+		hpc_ptr->ctlr_id = ctlr_id;
+		hpc_ptr->ctlr_relative_id = ctlr;
+		hpc_ptr->slot_count = slot_num;
+		hpc_ptr->bus_count = bus_num;
+		debug ("now enter ctlr data struture ---\n");
+		debug ("ctlr id: %x\n", ctlr_id);
+		debug ("ctlr_relative_id: %x\n", hpc_ptr->ctlr_relative_id);
+		debug ("count of slots controlled by this ctlr: %x\n", slot_num);
+		debug ("count of buses controlled by this ctlr: %x\n", bus_num);
+
+		/* init slot structure, fetch slot, bus, cap... */
+		slot_ptr = hpc_ptr->slots;
+		for (slot = 0; slot < slot_num; slot++) {
+			slot_ptr->slot_num = readb (io_mem + addr_slot);
+			slot_ptr->slot_bus_num = readb (io_mem + addr_slot + slot_num);
+			slot_ptr->ctl_index = readb (io_mem + addr_slot + 2*slot_num);
+			slot_ptr->slot_cap = readb (io_mem + addr_slot + 3*slot_num);
+
+			// create bus_info lined list --- if only one slot per bus: slot_min = slot_max 
+
+			bus_info_ptr2 = ibmphp_find_same_bus_num (slot_ptr->slot_bus_num);
+			if (!bus_info_ptr2) {
+				bus_info_ptr1 = (struct bus_info *) kmalloc (sizeof (struct bus_info), GFP_KERNEL);
+				if (!bus_info_ptr1) {
+					rc = -ENOMEM;
+					goto error_no_hp_slot;
+				}
+				memset (bus_info_ptr1, 0, sizeof (struct bus_info));
+				bus_info_ptr1->slot_min = slot_ptr->slot_num;
+				bus_info_ptr1->slot_max = slot_ptr->slot_num;
+				bus_info_ptr1->slot_count += 1;
+				bus_info_ptr1->busno = slot_ptr->slot_bus_num;
+				bus_info_ptr1->index = bus_index++;
+				bus_info_ptr1->current_speed = 0xff;
+				bus_info_ptr1->current_bus_mode = 0xff;
+				
+				bus_info_ptr1->controller_id = hpc_ptr->ctlr_id;
+				
+				list_add_tail (&bus_info_ptr1->bus_info_list, &bus_info_head);
+
+			} else {
+				bus_info_ptr2->slot_min = min (bus_info_ptr2->slot_min, slot_ptr->slot_num);
+				bus_info_ptr2->slot_max = max (bus_info_ptr2->slot_max, slot_ptr->slot_num);
+				bus_info_ptr2->slot_count += 1;
+
+			}
+
+			// end of creating the bus_info linked list
+
+			slot_ptr++;
+			addr_slot += 1;
+		}
+
+		/* init bus structure */
+		bus_ptr = hpc_ptr->buses;
+		for (bus = 0; bus < bus_num; bus++) {
+			bus_ptr->bus_num = readb (io_mem + addr_bus + bus);
+			bus_ptr->slots_at_33_conv = readb (io_mem + addr_bus + bus_num + 8 * bus);
+			bus_ptr->slots_at_66_conv = readb (io_mem + addr_bus + bus_num + 8 * bus + 1);
+
+			bus_ptr->slots_at_66_pcix = readb (io_mem + addr_bus + bus_num + 8 * bus + 2);
+
+			bus_ptr->slots_at_100_pcix = readb (io_mem + addr_bus + bus_num + 8 * bus + 3);
+
+			bus_ptr->slots_at_133_pcix = readb (io_mem + addr_bus + bus_num + 8 * bus + 4);
+
+			bus_info_ptr2 = ibmphp_find_same_bus_num (bus_ptr->bus_num);
+			if (bus_info_ptr2) {
+				bus_info_ptr2->slots_at_33_conv = bus_ptr->slots_at_33_conv;
+				bus_info_ptr2->slots_at_66_conv = bus_ptr->slots_at_66_conv;
+				bus_info_ptr2->slots_at_66_pcix = bus_ptr->slots_at_66_pcix;
+				bus_info_ptr2->slots_at_100_pcix = bus_ptr->slots_at_100_pcix;
+				bus_info_ptr2->slots_at_133_pcix = bus_ptr->slots_at_133_pcix; 
+			}
+			bus_ptr++;
+		}
+
+		hpc_ptr->ctlr_type = temp;
+
+		switch (hpc_ptr->ctlr_type) {
+			case 1:
+				hpc_ptr->u.pci_ctlr.bus = readb (io_mem + addr);
+				hpc_ptr->u.pci_ctlr.dev_fun = readb (io_mem + addr + 1);
+				hpc_ptr->irq = readb (io_mem + addr + 2);
+				addr += 3;
+				debug ("ctrl bus = %x, ctlr devfun = %x, irq = %x\n", 
+					hpc_ptr->u.pci_ctlr.bus,
+					hpc_ptr->u.pci_ctlr.dev_fun, hpc_ptr->irq);
+				break;
+
+			case 0:
+				hpc_ptr->u.isa_ctlr.io_start = readw (io_mem + addr);
+				hpc_ptr->u.isa_ctlr.io_end = readw (io_mem + addr + 2);
+				if (!request_region (hpc_ptr->u.isa_ctlr.io_start,
+						     (hpc_ptr->u.isa_ctlr.io_end - hpc_ptr->u.isa_ctlr.io_start + 1),
+						     "ibmphp")) {
+					rc = -ENODEV;
+					goto error_no_hp_slot;
+				}
+				hpc_ptr->irq = readb (io_mem + addr + 4);
+				addr += 5;
+				break;
+
+			case 2:
+			case 4:
+				hpc_ptr->u.wpeg_ctlr.wpegbbar = readl (io_mem + addr);
+				hpc_ptr->u.wpeg_ctlr.i2c_addr = readb (io_mem + addr + 4);
+				hpc_ptr->irq = readb (io_mem + addr + 5);
+				addr += 6;
+				break;
+			default:
+				rc = -ENODEV;
+				goto error_no_hp_slot;
+		}
+
+		//reorganize chassis' linked list
+		combine_wpg_for_chassis ();
+		combine_wpg_for_expansion ();
+		hpc_ptr->revision = 0xff;
+		hpc_ptr->options = 0xff;
+		hpc_ptr->starting_slot_num = hpc_ptr->slots[0].slot_num;
+		hpc_ptr->ending_slot_num = hpc_ptr->slots[slot_num-1].slot_num;
+
+		// register slots with hpc core as well as create linked list of ibm slot
+		for (index = 0; index < hpc_ptr->slot_count; index++) {
+
+			hp_slot_ptr = kmalloc(sizeof(*hp_slot_ptr), GFP_KERNEL);
+			if (!hp_slot_ptr) {
+				rc = -ENOMEM;
+				goto error_no_hp_slot;
+			}
+			memset(hp_slot_ptr, 0, sizeof(*hp_slot_ptr));
+
+			hp_slot_ptr->info = kmalloc (sizeof(struct hotplug_slot_info), GFP_KERNEL);
+			if (!hp_slot_ptr->info) {
+				rc = -ENOMEM;
+				goto error_no_hp_info;
+			}
+			memset(hp_slot_ptr->info, 0, sizeof(struct hotplug_slot_info));
+
+			hp_slot_ptr->name = kmalloc(30, GFP_KERNEL);
+			if (!hp_slot_ptr->name) {
+				rc = -ENOMEM;
+				goto error_no_hp_name;
+			}
+
+			tmp_slot = kmalloc(sizeof(*tmp_slot), GFP_KERNEL);
+			if (!tmp_slot) {
+				rc = -ENOMEM;
+				goto error_no_slot;
+			}
+			memset(tmp_slot, 0, sizeof(*tmp_slot));
+
+			tmp_slot->flag = TRUE;
+
+			tmp_slot->capabilities = hpc_ptr->slots[index].slot_cap;
+			if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_133_MAX) == EBDA_SLOT_133_MAX)
+				tmp_slot->supported_speed =  3;
+			else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_100_MAX) == EBDA_SLOT_100_MAX)
+				tmp_slot->supported_speed =  2;
+			else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_66_MAX) == EBDA_SLOT_66_MAX)
+				tmp_slot->supported_speed =  1;
+				
+			if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_PCIX_CAP) == EBDA_SLOT_PCIX_CAP)
+				tmp_slot->supported_bus_mode = 1;
+			else
+				tmp_slot->supported_bus_mode = 0;
+
+
+			tmp_slot->bus = hpc_ptr->slots[index].slot_bus_num;
+
+			bus_info_ptr1 = ibmphp_find_same_bus_num (hpc_ptr->slots[index].slot_bus_num);
+			if (!bus_info_ptr1) {
+				rc = -ENODEV;
+				goto error;
+			}
+			tmp_slot->bus_on = bus_info_ptr1;
+			bus_info_ptr1 = NULL;
+			tmp_slot->ctrl = hpc_ptr;
+
+			tmp_slot->ctlr_index = hpc_ptr->slots[index].ctl_index;
+			tmp_slot->number = hpc_ptr->slots[index].slot_num;
+			tmp_slot->hotplug_slot = hp_slot_ptr;
+
+			hp_slot_ptr->private = tmp_slot;
+			hp_slot_ptr->release = release_slot;
+
+			rc = fillslotinfo(hp_slot_ptr);
+			if (rc)
+				goto error;
+
+			rc = ibmphp_init_devno ((struct slot **) &hp_slot_ptr->private);
+			if (rc)
+				goto error;
+			hp_slot_ptr->ops = &ibmphp_hotplug_slot_ops;
+
+			// end of registering ibm slot with hotplug core
+
+			list_add (& ((struct slot *)(hp_slot_ptr->private))->ibm_slot_list, &ibmphp_slot_head);
+		}
+
+		print_bus_info ();
+		list_add (&hpc_ptr->ebda_hpc_list, &ebda_hpc_head );
+
+	}			/* each hpc  */
+
+	list_for_each (list, &ibmphp_slot_head) {
+		tmp_slot = list_entry (list, struct slot, ibm_slot_list);
+
+		snprintf (tmp_slot->hotplug_slot->name, 30, "%s", create_file_name (tmp_slot));
+		pci_hp_register (tmp_slot->hotplug_slot);
+	}
+
+	print_ebda_hpc ();
+	print_ibm_slot ();
+	return 0;
+
+error:
+	kfree (hp_slot_ptr->private);
+error_no_slot:
+	kfree (hp_slot_ptr->name);
+error_no_hp_name:
+	kfree (hp_slot_ptr->info);
+error_no_hp_info:
+	kfree (hp_slot_ptr);
+error_no_hp_slot:
+	free_ebda_hpc (hpc_ptr);
+error_no_hpc:
+	iounmap (io_mem);
+	return rc;
+}
+
+/* 
+ * map info (bus, devfun, start addr, end addr..) of i/o, memory,
+ * pfm from the physical addr to a list of resource.
+ */
+static int __init ebda_rsrc_rsrc (void)
+{
+	u16 addr;
+	short rsrc;
+	u8 type, rsrc_type;
+	struct ebda_pci_rsrc *rsrc_ptr;
+
+	addr = rsrc_list_ptr->phys_addr;
+	debug ("now entering rsrc land\n");
+	debug ("offset of rsrc: %x\n", rsrc_list_ptr->phys_addr);
+
+	for (rsrc = 0; rsrc < rsrc_list_ptr->num_entries; rsrc++) {
+		type = readb (io_mem + addr);
+
+		addr += 1;
+		rsrc_type = type & EBDA_RSRC_TYPE_MASK;
+
+		if (rsrc_type == EBDA_IO_RSRC_TYPE) {
+			rsrc_ptr = alloc_ebda_pci_rsrc ();
+			if (!rsrc_ptr) {
+				iounmap (io_mem);
+				return -ENOMEM;
+			}
+			rsrc_ptr->rsrc_type = type;
+
+			rsrc_ptr->bus_num = readb (io_mem + addr);
+			rsrc_ptr->dev_fun = readb (io_mem + addr + 1);
+			rsrc_ptr->start_addr = readw (io_mem + addr + 2);
+			rsrc_ptr->end_addr = readw (io_mem + addr + 4);
+			addr += 6;
+
+			debug ("rsrc from io type ----\n");
+			debug ("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",
+				rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr);
+
+			list_add (&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head);
+		}
+
+		if (rsrc_type == EBDA_MEM_RSRC_TYPE || rsrc_type == EBDA_PFM_RSRC_TYPE) {
+			rsrc_ptr = alloc_ebda_pci_rsrc ();
+			if (!rsrc_ptr ) {
+				iounmap (io_mem);
+				return -ENOMEM;
+			}
+			rsrc_ptr->rsrc_type = type;
+
+			rsrc_ptr->bus_num = readb (io_mem + addr);
+			rsrc_ptr->dev_fun = readb (io_mem + addr + 1);
+			rsrc_ptr->start_addr = readl (io_mem + addr + 2);
+			rsrc_ptr->end_addr = readl (io_mem + addr + 6);
+			addr += 10;
+
+			debug ("rsrc from mem or pfm ---\n");
+			debug ("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n", 
+				rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr);
+
+			list_add (&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head);
+		}
+	}
+	kfree (rsrc_list_ptr);
+	rsrc_list_ptr = NULL;
+	print_ebda_pci_rsrc ();
+	return 0;
+}
+
+u16 ibmphp_get_total_controllers (void)
+{
+	return hpc_list_ptr->num_ctlrs;
+}
+
+struct slot *ibmphp_get_slot_from_physical_num (u8 physical_num)
+{
+	struct slot *slot;
+	struct list_head *list;
+
+	list_for_each (list, &ibmphp_slot_head) {
+		slot = list_entry (list, struct slot, ibm_slot_list);
+		if (slot->number == physical_num)
+			return slot;
+	}
+	return NULL;
+}
+
+/* To find:
+ *	- the smallest slot number
+ *	- the largest slot number
+ *	- the total number of the slots based on each bus
+ *	  (if only one slot per bus slot_min = slot_max )
+ */
+struct bus_info *ibmphp_find_same_bus_num (u32 num)
+{
+	struct bus_info *ptr;
+	struct list_head  *ptr1;
+
+	list_for_each (ptr1, &bus_info_head) {
+		ptr = list_entry (ptr1, struct bus_info, bus_info_list); 
+		if (ptr->busno == num) 
+			 return ptr;
+	}
+	return NULL;
+}
+
+/*  Finding relative bus number, in order to map corresponding
+ *  bus register
+ */
+int ibmphp_get_bus_index (u8 num)
+{
+	struct bus_info *ptr;
+	struct list_head  *ptr1;
+
+	list_for_each (ptr1, &bus_info_head) {
+		ptr = list_entry (ptr1, struct bus_info, bus_info_list);
+		if (ptr->busno == num)  
+			return ptr->index;
+	}
+	return -ENODEV;
+}
+
+void ibmphp_free_bus_info_queue (void)
+{
+	struct bus_info *bus_info;
+	struct list_head *list;
+	struct list_head *next;
+
+	list_for_each_safe (list, next, &bus_info_head ) {
+		bus_info = list_entry (list, struct bus_info, bus_info_list);
+		kfree (bus_info);
+	}
+}
+
+void ibmphp_free_ebda_hpc_queue (void)
+{
+	struct controller *controller = NULL;
+	struct list_head *list;
+	struct list_head *next;
+	int pci_flag = 0;
+
+	list_for_each_safe (list, next, &ebda_hpc_head) {
+		controller = list_entry (list, struct controller, ebda_hpc_list);
+		if (controller->ctlr_type == 0)
+			release_region (controller->u.isa_ctlr.io_start, (controller->u.isa_ctlr.io_end - controller->u.isa_ctlr.io_start + 1));
+		else if ((controller->ctlr_type == 1) && (!pci_flag)) {
+			++pci_flag;
+			pci_unregister_driver (&ibmphp_driver);
+		}
+		free_ebda_hpc (controller);
+	}
+}
+
+void ibmphp_free_ebda_pci_rsrc_queue (void)
+{
+	struct ebda_pci_rsrc *resource;
+	struct list_head *list;
+	struct list_head *next;
+
+	list_for_each_safe (list, next, &ibmphp_ebda_pci_rsrc_head) {
+		resource = list_entry (list, struct ebda_pci_rsrc, ebda_pci_rsrc_list);
+		kfree (resource);
+		resource = NULL;
+	}
+}
+
+static struct pci_device_id id_table[] = {
+	{
+		.vendor		= PCI_VENDOR_ID_IBM,
+		.device		= HPC_DEVICE_ID,
+		.subvendor	= PCI_VENDOR_ID_IBM,
+		.subdevice	= HPC_SUBSYSTEM_ID,
+		.class		= ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00),
+	}, {}
+};		
+
+MODULE_DEVICE_TABLE(pci, id_table);
+
+static int ibmphp_probe (struct pci_dev *, const struct pci_device_id *);
+static struct pci_driver ibmphp_driver = {
+	.name		= "ibmphp",
+	.id_table	= id_table,
+	.probe		= ibmphp_probe,
+};
+
+int ibmphp_register_pci (void)
+{
+	struct controller *ctrl;
+	struct list_head *tmp;
+	int rc = 0;
+
+	list_for_each (tmp, &ebda_hpc_head) {
+		ctrl = list_entry (tmp, struct controller, ebda_hpc_list);
+		if (ctrl->ctlr_type == 1) {
+			rc = pci_register_driver(&ibmphp_driver);
+			break;
+		}
+	}
+	return rc;
+}
+static int ibmphp_probe (struct pci_dev * dev, const struct pci_device_id *ids)
+{
+	struct controller *ctrl;
+	struct list_head *tmp;
+
+	debug ("inside ibmphp_probe\n");
+	
+	list_for_each (tmp, &ebda_hpc_head) {
+		ctrl = list_entry (tmp, struct controller, ebda_hpc_list);
+		if (ctrl->ctlr_type == 1) {
+			if ((dev->devfn == ctrl->u.pci_ctlr.dev_fun) && (dev->bus->number == ctrl->u.pci_ctlr.bus)) {
+				ctrl->ctrl_dev = dev;
+				debug ("found device!!!\n");
+				debug ("dev->device = %x, dev->subsystem_device = %x\n", dev->device, dev->subsystem_device);
+				return 0;
+			}
+		}
+	}
+	return -ENODEV;
+}
+