drivers/pci/hotplug/pciehprm_nonacpi.c - kernel/msm-4.19 - Gitiles

 /*
  * PCIEHPRM NONACPI: PHP Resource Manager for Non-ACPI/Legacy platform
  *
  * Copyright (C) 1995,2001 Compaq Computer Corporation
  * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
  * Copyright (C) 2001 IBM Corp.
  * Copyright (C) 2003-2004 Intel Corporation
  *
  * All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or (at
  * your option) any later version.
  *
  * This program is distributed in the hope that it will be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  * NON INFRINGEMENT.  See the GNU General Public License for more
  * details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  *
  * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com>
  *
  */

 #include <linux/config.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/sched.h>
 #include <linux/pci.h>
 #include <linux/init.h>
 #include <linux/slab.h>

 #include <asm/uaccess.h>
 #ifdef CONFIG_IA64
 #include <asm/iosapic.h>
 #endif

 #include "pciehp.h"
 #include "pciehprm.h"
 #include "pciehprm_nonacpi.h"


 void pciehprm_cleanup(void)
 {
 	return;
 }

 int pciehprm_print_pirt(void)
 {
 	return 0;
 }

 int pciehprm_get_physical_slot_number(struct controller *ctrl, u32 *sun, u8 busnum, u8 devnum)
 {

 	*sun = (u8) (ctrl->first_slot);
 	return 0;
 }


 static void print_pci_resource ( struct pci_resource	*aprh)
 {
 	struct pci_resource	*res;

 	for (res = aprh; res; res = res->next)
 		dbg("        base= 0x%x length= 0x%x\n", res->base, res->length);
 }


 static void phprm_dump_func_res( struct pci_func *fun)
 {
 	struct pci_func *func = fun;

 	if (func->bus_head) {
 		dbg(":    BUS Resources:\n");
 		print_pci_resource (func->bus_head);
 	}
 	if (func->io_head) {
 		dbg(":    IO Resources:\n");
 		print_pci_resource (func->io_head);
 	}
 	if (func->mem_head) {
 		dbg(":    MEM Resources:\n");
 		print_pci_resource (func->mem_head);
 	}
 	if (func->p_mem_head) {
 		dbg(":    PMEM Resources:\n");
 		print_pci_resource (func->p_mem_head);
 	}
 }

 static int phprm_get_used_resources (
 	struct controller *ctrl,
 	struct pci_func *func
 	)
 {
 	return pciehp_save_used_resources (ctrl, func, !DISABLE_CARD);
 }

 static int phprm_delete_resource(
 	struct pci_resource **aprh,
 	ulong base,
 	ulong size)
 {
 	struct pci_resource *res;
 	struct pci_resource *prevnode;
 	struct pci_resource *split_node;
 	ulong tbase;

 	pciehp_resource_sort_and_combine(aprh);

 	for (res = *aprh; res; res = res->next) {
 		if (res->base > base)
 			continue;

 		if ((res->base + res->length) < (base + size))
 			continue;

 		if (res->base < base) {
 			tbase = base;

 			if ((res->length - (tbase - res->base)) < size)
 				continue;

 			split_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
 			if (!split_node)
 				return -ENOMEM;

 			split_node->base = res->base;
 			split_node->length = tbase - res->base;
 			res->base = tbase;
 			res->length -= split_node->length;

 			split_node->next = res->next;
 			res->next = split_node;
 		}

 		if (res->length >= size) {
 			split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
 			if (!split_node)
 				return -ENOMEM;

 			split_node->base = res->base + size;
 			split_node->length = res->length - size;
 			res->length = size;

 			split_node->next = res->next;
 			res->next = split_node;
 		}

 		if (*aprh == res) {
 			*aprh = res->next;
 		} else {
 			prevnode = *aprh;
 			while (prevnode->next != res)
 				prevnode = prevnode->next;

 			prevnode->next = res->next;
 		}
 		res->next = NULL;
 		kfree(res);
 		break;
 	}

 	return 0;
 }


 static int phprm_delete_resources(
 	struct pci_resource **aprh,
 	struct pci_resource *this
 	)
 {
 	struct pci_resource *res;

 	for (res = this; res; res = res->next)
 		phprm_delete_resource(aprh, res->base, res->length);

 	return 0;
 }


 static int configure_existing_function(
 	struct controller *ctrl,
 	struct pci_func *func
 	)
 {
 	int rc;

 	/* see how much resources the func has used. */
 	rc = phprm_get_used_resources (ctrl, func);

 	if (!rc) {
 		/* subtract the resources used by the func from ctrl resources */
 		rc  = phprm_delete_resources (&ctrl->bus_head, func->bus_head);
 		rc |= phprm_delete_resources (&ctrl->io_head, func->io_head);
 		rc |= phprm_delete_resources (&ctrl->mem_head, func->mem_head);
 		rc |= phprm_delete_resources (&ctrl->p_mem_head, func->p_mem_head);
 		if (rc)
 			warn("aCEF: cannot del used resources\n");
 	} else
 		err("aCEF: cannot get used resources\n");

 	return rc;
 }

 static int pciehprm_delete_resource(
 	struct pci_resource **aprh,
 	ulong base,
 	ulong size)
 {
 	struct pci_resource *res;
 	struct pci_resource *prevnode;
 	struct pci_resource *split_node;
 	ulong tbase;

 	pciehp_resource_sort_and_combine(aprh);

 	for (res = *aprh; res; res = res->next) {
 		if (res->base > base)
 			continue;

 		if ((res->base + res->length) < (base + size))
 			continue;

 		if (res->base < base) {
 			tbase = base;

 			if ((res->length - (tbase - res->base)) < size)
 				continue;

 			split_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
 			if (!split_node)
 				return -ENOMEM;

 			split_node->base = res->base;
 			split_node->length = tbase - res->base;
 			res->base = tbase;
 			res->length -= split_node->length;

 			split_node->next = res->next;
 			res->next = split_node;
 		}

 		if (res->length >= size) {
 			split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
 			if (!split_node)
 				return -ENOMEM;

 			split_node->base = res->base + size;
 			split_node->length = res->length - size;
 			res->length = size;

 			split_node->next = res->next;
 			res->next = split_node;
 		}

 		if (*aprh == res) {
 			*aprh = res->next;
 		} else {
 			prevnode = *aprh;
 			while (prevnode->next != res)
 				prevnode = prevnode->next;

 			prevnode->next = res->next;
 		}
 		res->next = NULL;
 		kfree(res);
 		break;
 	}

 	return 0;
 }

 static int bind_pci_resources_to_slots ( struct controller *ctrl)
 {
 	struct pci_func *func, new_func;
 	int busn = ctrl->slot_bus;
 	int devn, funn;
 	u32	vid;

 	for (devn = 0; devn < 32; devn++) {
 		for (funn = 0; funn < 8; funn++) {
 			/*
 			if (devn == ctrl->device && funn == ctrl->function)
 				continue;
 			*/
 			/* find out if this entry is for an occupied slot */
 			vid = 0xFFFFFFFF;

 			pci_bus_read_config_dword(ctrl->pci_dev->subordinate, PCI_DEVFN(devn, funn), PCI_VENDOR_ID, &vid);

 			if (vid != 0xFFFFFFFF) {
 				dbg("%s: vid = %x bus %x dev %x fun %x\n", __FUNCTION__,
 				vid, busn, devn, funn);
 				func = pciehp_slot_find(busn, devn, funn);
 				dbg("%s: func = %p\n", __FUNCTION__,func);
 				if (!func) {
 					memset(&new_func, 0, sizeof(struct pci_func));
 					new_func.bus = busn;
 					new_func.device = devn;
 					new_func.function = funn;
 					new_func.is_a_board = 1;
 					configure_existing_function(ctrl, &new_func);
 					phprm_dump_func_res(&new_func);
 				} else {
 					configure_existing_function(ctrl, func);
 					phprm_dump_func_res(func);
 				}
 				dbg("aCCF:existing PCI 0x%x Func ResourceDump\n", ctrl->bus);
 			}
 		}
 	}

 	return 0;
 }

 static void phprm_dump_ctrl_res( struct controller *ctlr)
 {
 	struct controller *ctrl = ctlr;

 	if (ctrl->bus_head) {
 		dbg(":    BUS Resources:\n");
 		print_pci_resource (ctrl->bus_head);
 	}
 	if (ctrl->io_head) {
 		dbg(":    IO Resources:\n");
 		print_pci_resource (ctrl->io_head);
 	}
 	if (ctrl->mem_head) {
 		dbg(":    MEM Resources:\n");
 		print_pci_resource (ctrl->mem_head);
 	}
 	if (ctrl->p_mem_head) {
 		dbg(":    PMEM Resources:\n");
 		print_pci_resource (ctrl->p_mem_head);
 	}
 }

 /*
  * phprm_find_available_resources
  *
  *  Finds available memory, IO, and IRQ resources for programming
  *  devices which may be added to the system
  *  this function is for hot plug ADD!
  *
  * returns 0 if success
  */
 int pciehprm_find_available_resources(struct controller *ctrl)
 {
 	struct pci_func func;
 	u32 rc;

 	memset(&func, 0, sizeof(struct pci_func));

 	func.bus = ctrl->bus;
 	func.device = ctrl->device;
 	func.function = ctrl->function;
 	func.is_a_board = 1;

 	/* Get resources for this PCI bridge */
 	rc = pciehp_save_used_resources (ctrl, &func, !DISABLE_CARD);
 	dbg("%s: pciehp_save_used_resources rc = %d\n", __FUNCTION__, rc);

 	if (func.mem_head)
 		func.mem_head->next = ctrl->mem_head;
 	ctrl->mem_head = func.mem_head;

 	if (func.p_mem_head)
 		func.p_mem_head->next = ctrl->p_mem_head;
 	ctrl->p_mem_head = func.p_mem_head;

 	if (func.io_head)
 		func.io_head->next = ctrl->io_head;
 	ctrl->io_head = func.io_head;

 	if(func.bus_head)
 		func.bus_head->next = ctrl->bus_head;
 	ctrl->bus_head = func.bus_head;

 	if (ctrl->bus_head)
 		pciehprm_delete_resource(&ctrl->bus_head, ctrl->pci_dev->subordinate->number, 1);

 	dbg("%s:pre-Bind PCI 0x%x Ctrl Resource Dump\n", __FUNCTION__, ctrl->bus);
 	phprm_dump_ctrl_res(ctrl);

 	dbg("%s: before bind_pci_resources_to slots\n", __FUNCTION__);

 	bind_pci_resources_to_slots (ctrl);

 	dbg("%s:post-Bind PCI 0x%x Ctrl Resource Dump\n", __FUNCTION__, ctrl->bus);
 	phprm_dump_ctrl_res(ctrl);

 	return (rc);
 }

 int pciehprm_set_hpp(
 	struct controller *ctrl,
 	struct pci_func *func,
 	u8	card_type)
 {
 	u32 rc;
 	u8 temp_byte;
 	struct pci_bus lpci_bus, *pci_bus;
 	unsigned int	devfn;
 	memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus));
 	pci_bus = &lpci_bus;
 	pci_bus->number = func->bus;
 	devfn = PCI_DEVFN(func->device, func->function);

 	temp_byte = 0x40;	/* hard coded value for LT */
 	if (card_type == PCI_HEADER_TYPE_BRIDGE) {
 		/* set subordinate Latency Timer */
 		rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SEC_LATENCY_TIMER, temp_byte);

 		if (rc) {
 			dbg("%s: set secondary LT error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__,
 				func->bus, func->device, func->function);
 			return rc;
 		}
 	}

 	/* set base Latency Timer */
 	rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_LATENCY_TIMER, temp_byte);

 	if (rc) {
 		dbg("%s: set LT error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__, func->bus, func->device, func->function);
 		return rc;
 	}

 	/* set Cache Line size */
 	temp_byte = 0x08;	/* hard coded value for CLS */

 	rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_CACHE_LINE_SIZE, temp_byte);

 	if (rc) {
 		dbg("%s: set CLS error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__, func->bus, func->device, func->function);
 	}

 	/* set enable_perr */
 	/* set enable_serr */

 	return rc;
 }

 void pciehprm_enable_card(
 	struct controller *ctrl,
 	struct pci_func *func,
 	u8 card_type)
 {
 	u16 command, bcommand;
 	struct pci_bus lpci_bus, *pci_bus;
 	unsigned int devfn;
 	int rc;

 	memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus));
 	pci_bus = &lpci_bus;
 	pci_bus->number = func->bus;
 	devfn = PCI_DEVFN(func->device, func->function);

 	rc = pci_bus_read_config_word(pci_bus, devfn, PCI_COMMAND, &command);

 	command |= PCI_COMMAND_PARITY | PCI_COMMAND_SERR
 		| PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE
 		| PCI_COMMAND_IO | PCI_COMMAND_MEMORY;

 	rc = pci_bus_write_config_word(pci_bus, devfn, PCI_COMMAND, command);

 	if (card_type == PCI_HEADER_TYPE_BRIDGE) {

 		rc = pci_bus_read_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, &bcommand);

 		bcommand |= 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, bcommand);
 	}
 }

 static int legacy_pciehprm_init_pci(void)
 {
 	return 0;
 }

 int pciehprm_init(enum php_ctlr_type ctrl_type)
 {
 	int retval;

 	switch (ctrl_type) {
 	case PCI:
 		retval = legacy_pciehprm_init_pci();
 		break;
 	default:
 		retval = -ENODEV;
 		break;
 	}

 	return retval;
 }
	/*
	* PCIEHPRM NONACPI: PHP Resource Manager for Non-ACPI/Legacy platform
	*
	* Copyright (C) 1995,2001 Compaq Computer Corporation
	* Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
	* Copyright (C) 2001 IBM Corp.
	* Copyright (C) 2003-2004 Intel Corporation
	*
	* All rights reserved.
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or (at
	* your option) any later version.
	*
	* This program is distributed in the hope that it will be useful, but
	* WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
	* NON INFRINGEMENT. See the GNU General Public License for more
	* details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	*
	* Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com>
	*
	*/

	#include <linux/config.h>
	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/types.h>
	#include <linux/sched.h>
	#include <linux/pci.h>
	#include <linux/init.h>
	#include <linux/slab.h>

	#include <asm/uaccess.h>
	#ifdef CONFIG_IA64
	#include <asm/iosapic.h>
	#endif

	#include "pciehp.h"
	#include "pciehprm.h"
	#include "pciehprm_nonacpi.h"


	void pciehprm_cleanup(void)
	{
	return;
	}

	int pciehprm_print_pirt(void)
	{
	return 0;
	}

	int pciehprm_get_physical_slot_number(struct controller ctrl, u32 sun, u8 busnum, u8 devnum)
	{

	*sun = (u8) (ctrl->first_slot);
	return 0;
	}


	static void print_pci_resource ( struct pci_resource *aprh)
	{
	struct pci_resource *res;

	for (res = aprh; res; res = res->next)
	dbg(" base= 0x%x length= 0x%x\n", res->base, res->length);
	}


	static void phprm_dump_func_res( struct pci_func *fun)
	{
	struct pci_func *func = fun;

	if (func->bus_head) {
	dbg(": BUS Resources:\n");
	print_pci_resource (func->bus_head);
	}
	if (func->io_head) {
	dbg(": IO Resources:\n");
	print_pci_resource (func->io_head);
	}
	if (func->mem_head) {
	dbg(": MEM Resources:\n");
	print_pci_resource (func->mem_head);
	}
	if (func->p_mem_head) {
	dbg(": PMEM Resources:\n");
	print_pci_resource (func->p_mem_head);
	}
	}

	static int phprm_get_used_resources (
	struct controller *ctrl,
	struct pci_func *func
	)
	{
	return pciehp_save_used_resources (ctrl, func, !DISABLE_CARD);
	}

	static int phprm_delete_resource(
	struct pci_resource **aprh,
	ulong base,
	ulong size)
	{
	struct pci_resource *res;
	struct pci_resource *prevnode;
	struct pci_resource *split_node;
	ulong tbase;

	pciehp_resource_sort_and_combine(aprh);

	for (res = *aprh; res; res = res->next) {
	if (res->base > base)
	continue;

	if ((res->base + res->length) < (base + size))
	continue;

	if (res->base < base) {
	tbase = base;

	if ((res->length - (tbase - res->base)) < size)
	continue;

	split_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
	if (!split_node)
	return -ENOMEM;

	split_node->base = res->base;
	split_node->length = tbase - res->base;
	res->base = tbase;
	res->length -= split_node->length;

	split_node->next = res->next;
	res->next = split_node;
	}

	if (res->length >= size) {
	split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
	if (!split_node)
	return -ENOMEM;

	split_node->base = res->base + size;
	split_node->length = res->length - size;
	res->length = size;

	split_node->next = res->next;
	res->next = split_node;
	}

	if (*aprh == res) {
	*aprh = res->next;
	} else {
	prevnode = *aprh;
	while (prevnode->next != res)
	prevnode = prevnode->next;

	prevnode->next = res->next;
	}
	res->next = NULL;
	kfree(res);
	break;
	}

	return 0;
	}


	static int phprm_delete_resources(
	struct pci_resource **aprh,
	struct pci_resource *this
	)
	{
	struct pci_resource *res;

	for (res = this; res; res = res->next)
	phprm_delete_resource(aprh, res->base, res->length);

	return 0;
	}


	static int configure_existing_function(
	struct controller *ctrl,
	struct pci_func *func
	)
	{
	int rc;

	/* see how much resources the func has used. */
	rc = phprm_get_used_resources (ctrl, func);

	if (!rc) {
	/* subtract the resources used by the func from ctrl resources */
	rc = phprm_delete_resources (&ctrl->bus_head, func->bus_head);
	rc \|= phprm_delete_resources (&ctrl->io_head, func->io_head);
	rc \|= phprm_delete_resources (&ctrl->mem_head, func->mem_head);
	rc \|= phprm_delete_resources (&ctrl->p_mem_head, func->p_mem_head);
	if (rc)
	warn("aCEF: cannot del used resources\n");
	} else
	err("aCEF: cannot get used resources\n");

	return rc;
	}

	static int pciehprm_delete_resource(
	struct pci_resource **aprh,
	ulong base,
	ulong size)
	{
	struct pci_resource *res;
	struct pci_resource *prevnode;
	struct pci_resource *split_node;
	ulong tbase;

	pciehp_resource_sort_and_combine(aprh);

	for (res = *aprh; res; res = res->next) {
	if (res->base > base)
	continue;

	if ((res->base + res->length) < (base + size))
	continue;

	if (res->base < base) {
	tbase = base;

	if ((res->length - (tbase - res->base)) < size)
	continue;

	split_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
	if (!split_node)
	return -ENOMEM;

	split_node->base = res->base;
	split_node->length = tbase - res->base;
	res->base = tbase;
	res->length -= split_node->length;

	split_node->next = res->next;
	res->next = split_node;
	}

	if (res->length >= size) {
	split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
	if (!split_node)
	return -ENOMEM;

	split_node->base = res->base + size;
	split_node->length = res->length - size;
	res->length = size;

	split_node->next = res->next;
	res->next = split_node;
	}

	if (*aprh == res) {
	*aprh = res->next;
	} else {
	prevnode = *aprh;
	while (prevnode->next != res)
	prevnode = prevnode->next;

	prevnode->next = res->next;
	}
	res->next = NULL;
	kfree(res);
	break;
	}

	return 0;
	}

	static int bind_pci_resources_to_slots ( struct controller *ctrl)
	{
	struct pci_func *func, new_func;
	int busn = ctrl->slot_bus;
	int devn, funn;
	u32 vid;

	for (devn = 0; devn < 32; devn++) {
	for (funn = 0; funn < 8; funn++) {
	/*
	if (devn == ctrl->device && funn == ctrl->function)
	continue;
	*/
	/* find out if this entry is for an occupied slot */
	vid = 0xFFFFFFFF;

	pci_bus_read_config_dword(ctrl->pci_dev->subordinate, PCI_DEVFN(devn, funn), PCI_VENDOR_ID, &vid);

	if (vid != 0xFFFFFFFF) {
	dbg("%s: vid = %x bus %x dev %x fun %x\n", __FUNCTION__,
	vid, busn, devn, funn);
	func = pciehp_slot_find(busn, devn, funn);
	dbg("%s: func = %p\n", __FUNCTION__,func);
	if (!func) {
	memset(&new_func, 0, sizeof(struct pci_func));
	new_func.bus = busn;
	new_func.device = devn;
	new_func.function = funn;
	new_func.is_a_board = 1;
	configure_existing_function(ctrl, &new_func);
	phprm_dump_func_res(&new_func);
	} else {
	configure_existing_function(ctrl, func);
	phprm_dump_func_res(func);
	}
	dbg("aCCF:existing PCI 0x%x Func ResourceDump\n", ctrl->bus);
	}
	}
	}

	return 0;
	}

	static void phprm_dump_ctrl_res( struct controller *ctlr)
	{
	struct controller *ctrl = ctlr;

	if (ctrl->bus_head) {
	dbg(": BUS Resources:\n");
	print_pci_resource (ctrl->bus_head);
	}
	if (ctrl->io_head) {
	dbg(": IO Resources:\n");
	print_pci_resource (ctrl->io_head);
	}
	if (ctrl->mem_head) {
	dbg(": MEM Resources:\n");
	print_pci_resource (ctrl->mem_head);
	}
	if (ctrl->p_mem_head) {
	dbg(": PMEM Resources:\n");
	print_pci_resource (ctrl->p_mem_head);
	}
	}

	/*
	* phprm_find_available_resources
	*
	* Finds available memory, IO, and IRQ resources for programming
	* devices which may be added to the system
	* this function is for hot plug ADD!
	*
	* returns 0 if success
	*/
	int pciehprm_find_available_resources(struct controller *ctrl)
	{
	struct pci_func func;
	u32 rc;

	memset(&func, 0, sizeof(struct pci_func));

	func.bus = ctrl->bus;
	func.device = ctrl->device;
	func.function = ctrl->function;
	func.is_a_board = 1;

	/* Get resources for this PCI bridge */
	rc = pciehp_save_used_resources (ctrl, &func, !DISABLE_CARD);
	dbg("%s: pciehp_save_used_resources rc = %d\n", __FUNCTION__, rc);

	if (func.mem_head)
	func.mem_head->next = ctrl->mem_head;
	ctrl->mem_head = func.mem_head;

	if (func.p_mem_head)
	func.p_mem_head->next = ctrl->p_mem_head;
	ctrl->p_mem_head = func.p_mem_head;

	if (func.io_head)
	func.io_head->next = ctrl->io_head;
	ctrl->io_head = func.io_head;

	if(func.bus_head)
	func.bus_head->next = ctrl->bus_head;
	ctrl->bus_head = func.bus_head;

	if (ctrl->bus_head)
	pciehprm_delete_resource(&ctrl->bus_head, ctrl->pci_dev->subordinate->number, 1);

	dbg("%s:pre-Bind PCI 0x%x Ctrl Resource Dump\n", __FUNCTION__, ctrl->bus);
	phprm_dump_ctrl_res(ctrl);

	dbg("%s: before bind_pci_resources_to slots\n", __FUNCTION__);

	bind_pci_resources_to_slots (ctrl);

	dbg("%s:post-Bind PCI 0x%x Ctrl Resource Dump\n", __FUNCTION__, ctrl->bus);
	phprm_dump_ctrl_res(ctrl);

	return (rc);
	}

	int pciehprm_set_hpp(
	struct controller *ctrl,
	struct pci_func *func,
	u8 card_type)
	{
	u32 rc;
	u8 temp_byte;
	struct pci_bus lpci_bus, *pci_bus;
	unsigned int devfn;
	memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus));
	pci_bus = &lpci_bus;
	pci_bus->number = func->bus;
	devfn = PCI_DEVFN(func->device, func->function);

	temp_byte = 0x40; /* hard coded value for LT */
	if (card_type == PCI_HEADER_TYPE_BRIDGE) {
	/* set subordinate Latency Timer */
	rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SEC_LATENCY_TIMER, temp_byte);

	if (rc) {
	dbg("%s: set secondary LT error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__,
	func->bus, func->device, func->function);
	return rc;
	}
	}

	/* set base Latency Timer */
	rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_LATENCY_TIMER, temp_byte);

	if (rc) {
	dbg("%s: set LT error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__, func->bus, func->device, func->function);
	return rc;
	}

	/* set Cache Line size */
	temp_byte = 0x08; /* hard coded value for CLS */

	rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_CACHE_LINE_SIZE, temp_byte);

	if (rc) {
	dbg("%s: set CLS error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__, func->bus, func->device, func->function);
	}

	/* set enable_perr */
	/* set enable_serr */

	return rc;
	}

	void pciehprm_enable_card(
	struct controller *ctrl,
	struct pci_func *func,
	u8 card_type)
	{
	u16 command, bcommand;
	struct pci_bus lpci_bus, *pci_bus;
	unsigned int devfn;
	int rc;

	memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus));
	pci_bus = &lpci_bus;
	pci_bus->number = func->bus;
	devfn = PCI_DEVFN(func->device, func->function);

	rc = pci_bus_read_config_word(pci_bus, devfn, PCI_COMMAND, &command);

	command \|= PCI_COMMAND_PARITY \| PCI_COMMAND_SERR
	\| PCI_COMMAND_MASTER \| PCI_COMMAND_INVALIDATE
	\| PCI_COMMAND_IO \| PCI_COMMAND_MEMORY;

	rc = pci_bus_write_config_word(pci_bus, devfn, PCI_COMMAND, command);

	if (card_type == PCI_HEADER_TYPE_BRIDGE) {

	rc = pci_bus_read_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, &bcommand);

	bcommand \|= 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, bcommand);
	}
	}

	static int legacy_pciehprm_init_pci(void)
	{
	return 0;
	}

	int pciehprm_init(enum php_ctlr_type ctrl_type)
	{
	int retval;

	switch (ctrl_type) {
	case PCI:
	retval = legacy_pciehprm_init_pci();
	break;
	default:
	retval = -ENODEV;
	break;
	}

	return retval;
	}