drivers/pci/hotplug/pciehp.h - linux - Git at Google

 /*
  * PCI Express 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.
  * 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>
  *
  */
 #ifndef _PCIEHP_H
 #define _PCIEHP_H

 #include <linux/types.h>
 #include <linux/pci.h>
 #include <linux/delay.h>
 #include <asm/semaphore.h>
 #include <asm/io.h>
 #include <linux/pcieport_if.h>
 #include "pci_hotplug.h"

 #define MY_NAME	"pciehp"

 extern int pciehp_poll_mode;
 extern int pciehp_poll_time;
 extern int pciehp_debug;

 /*#define dbg(format, arg...) do { if (pciehp_debug) printk(KERN_DEBUG "%s: " format, MY_NAME , ## arg); } while (0)*/
 #define dbg(format, arg...) do { if (pciehp_debug) printk("%s: " format, MY_NAME , ## arg); } while (0)
 #define err(format, arg...) printk(KERN_ERR "%s: " format, MY_NAME , ## arg)
 #define info(format, arg...) printk(KERN_INFO "%s: " format, MY_NAME , ## arg)
 #define warn(format, arg...) printk(KERN_WARNING "%s: " format, MY_NAME , ## arg)

 struct pci_func {
 	struct pci_func *next;
 	u8 bus;
 	u8 device;
 	u8 function;
 	u8 is_a_board;
 	u16 status;
 	u8 configured;
 	u8 switch_save;
 	u8 presence_save;
 	u32 base_length[0x06];
 	u8 base_type[0x06];
 	u16 reserved2;
 	u32 config_space[0x20];
 	struct pci_resource *mem_head;
 	struct pci_resource *p_mem_head;
 	struct pci_resource *io_head;
 	struct pci_resource *bus_head;
 	struct pci_dev* pci_dev;
 };

 struct slot {
 	struct slot *next;
 	u8 bus;
 	u8 device;
 	u32 number;
 	u8 is_a_board;
 	u8 configured;
 	u8 state;
 	u8 switch_save;
 	u8 presence_save;
 	u32 capabilities;
 	u16 reserved2;
 	struct timer_list task_event;
 	u8 hp_slot;
 	struct controller *ctrl;
 	struct hpc_ops *hpc_ops;
 	struct hotplug_slot *hotplug_slot;
 	struct list_head	slot_list;
 };

 struct pci_resource {
 	struct pci_resource * next;
 	u32 base;
 	u32 length;
 };

 struct event_info {
 	u32 event_type;
 	u8 hp_slot;
 };

 struct controller {
 	struct controller *next;
 	struct semaphore crit_sect;	/* critical section semaphore */
 	void *hpc_ctlr_handle;		/* HPC controller handle */
 	int num_slots;			/* Number of slots on ctlr */
 	int slot_num_inc;		/* 1 or -1 */
 	struct pci_resource *mem_head;
 	struct pci_resource *p_mem_head;
 	struct pci_resource *io_head;
 	struct pci_resource *bus_head;
 	struct pci_dev *pci_dev;
 	struct pci_bus *pci_bus;
 	struct event_info event_queue[10];
 	struct slot *slot;
 	struct hpc_ops *hpc_ops;
 	wait_queue_head_t queue;	/* sleep & wake process */
 	u8 next_event;
 	u8 seg;
 	u8 bus;
 	u8 device;
 	u8 function;
 	u8 rev;
 	u8 slot_device_offset;
 	u8 add_support;
 	enum pci_bus_speed speed;
 	u32 first_slot;		/* First physical slot number */  /* PCIE only has 1 slot */
 	u8 slot_bus;		/* Bus where the slots handled by this controller sit */
 	u8 ctrlcap;
 	u16 vendor_id;
 	u8 cap_base;
 };

 struct irq_mapping {
 	u8 barber_pole;
 	u8 valid_INT;
 	u8 interrupt[4];
 };

 struct resource_lists {
 	struct pci_resource *mem_head;
 	struct pci_resource *p_mem_head;
 	struct pci_resource *io_head;
 	struct pci_resource *bus_head;
 	struct irq_mapping *irqs;
 };

 #define INT_BUTTON_IGNORE		0
 #define INT_PRESENCE_ON			1
 #define INT_PRESENCE_OFF		2
 #define INT_SWITCH_CLOSE		3
 #define INT_SWITCH_OPEN			4
 #define INT_POWER_FAULT			5
 #define INT_POWER_FAULT_CLEAR		6
 #define INT_BUTTON_PRESS		7
 #define INT_BUTTON_RELEASE		8
 #define INT_BUTTON_CANCEL		9

 #define STATIC_STATE			0
 #define BLINKINGON_STATE		1
 #define BLINKINGOFF_STATE		2
 #define POWERON_STATE			3
 #define POWEROFF_STATE			4

 #define PCI_TO_PCI_BRIDGE_CLASS		0x00060400

 /* Error messages */
 #define INTERLOCK_OPEN			0x00000002
 #define ADD_NOT_SUPPORTED		0x00000003
 #define CARD_FUNCTIONING		0x00000005
 #define ADAPTER_NOT_SAME		0x00000006
 #define NO_ADAPTER_PRESENT		0x00000009
 #define NOT_ENOUGH_RESOURCES		0x0000000B
 #define DEVICE_TYPE_NOT_SUPPORTED	0x0000000C
 #define WRONG_BUS_FREQUENCY		0x0000000D
 #define POWER_FAILURE			0x0000000E

 #define REMOVE_NOT_SUPPORTED		0x00000003

 #define DISABLE_CARD			1

 /* Field definitions in Slot Capabilities Register */
 #define ATTN_BUTTN_PRSN	0x00000001
 #define	PWR_CTRL_PRSN	0x00000002
 #define MRL_SENS_PRSN	0x00000004
 #define ATTN_LED_PRSN	0x00000008
 #define PWR_LED_PRSN	0x00000010
 #define HP_SUPR_RM_SUP	0x00000020

 #define ATTN_BUTTN(cap)		(cap & ATTN_BUTTN_PRSN)
 #define POWER_CTRL(cap)		(cap & PWR_CTRL_PRSN)
 #define MRL_SENS(cap)		(cap & MRL_SENS_PRSN)
 #define ATTN_LED(cap)		(cap & ATTN_LED_PRSN)
 #define PWR_LED(cap)		(cap & PWR_LED_PRSN)
 #define HP_SUPR_RM(cap)		(cap & HP_SUPR_RM_SUP)

 /*
  * error Messages
  */
 #define msg_initialization_err	"Initialization failure, error=%d\n"
 #define msg_HPC_rev_error	"Unsupported revision of the PCI hot plug controller found.\n"
 #define msg_HPC_non_pcie	"The PCI hot plug controller is not supported by this driver.\n"
 #define msg_HPC_not_supported	"This system is not supported by this version of pciephd module. Upgrade to a newer version of pciehpd\n"
 #define msg_unable_to_save	"Unable to store PCI hot plug add resource information. This system must be rebooted before adding any PCI devices.\n"
 #define msg_button_on		"PCI slot #%d - powering on due to button press.\n"
 #define msg_button_off		"PCI slot #%d - powering off due to button press.\n"
 #define msg_button_cancel	"PCI slot #%d - action canceled due to button press.\n"
 #define msg_button_ignore	"PCI slot #%d - button press ignored.  (action in progress...)\n"

 /* controller functions */
 extern int	pciehprm_find_available_resources	(struct controller *ctrl);
 extern int	pciehp_event_start_thread	(void);
 extern void	pciehp_event_stop_thread	(void);
 extern struct 	pci_func *pciehp_slot_create	(unsigned char busnumber);
 extern struct 	pci_func *pciehp_slot_find	(unsigned char bus, unsigned char device, unsigned char index);
 extern int	pciehp_enable_slot		(struct slot *slot);
 extern int	pciehp_disable_slot		(struct slot *slot);

 extern u8	pciehp_handle_attention_button	(u8 hp_slot, void *inst_id);
 extern u8	pciehp_handle_switch_change	(u8 hp_slot, void *inst_id);
 extern u8	pciehp_handle_presence_change	(u8 hp_slot, void *inst_id);
 extern u8	pciehp_handle_power_fault	(u8 hp_slot, void *inst_id);
 /* extern void	long_delay (int delay); */

 /* resource functions */
 extern int	pciehp_resource_sort_and_combine	(struct pci_resource **head);

 /* pci functions */
 extern int	pciehp_set_irq			(u8 bus_num, u8 dev_num, u8 int_pin, u8 irq_num);
 /*extern int	pciehp_get_bus_dev		(struct controller *ctrl, u8 *bus_num, u8 *dev_num, struct slot *slot);*/
 extern int	pciehp_save_config	 	(struct controller *ctrl, int busnumber, int num_ctlr_slots, int first_device_num);
 extern int	pciehp_save_used_resources	(struct controller *ctrl, struct pci_func * func, int flag);
 extern int	pciehp_save_slot_config		(struct controller *ctrl, struct pci_func * new_slot);
 extern void	pciehp_destroy_board_resources	(struct pci_func * func);
 extern int	pciehp_return_board_resources	(struct pci_func * func, struct resource_lists * resources);
 extern void	pciehp_destroy_resource_list	(struct resource_lists * resources);
 extern int	pciehp_configure_device		(struct controller* ctrl, struct pci_func* func);
 extern int	pciehp_unconfigure_device	(struct pci_func* func);


 /* Global variables */
 extern struct controller *pciehp_ctrl_list;
 extern struct pci_func *pciehp_slot_list[256];

 /* Inline functions */

 static inline struct slot *pciehp_find_slot(struct controller *ctrl, u8 device)
 {
 	struct slot *p_slot, *tmp_slot = NULL;

 	p_slot = ctrl->slot;

 	dbg("p_slot = %p\n", p_slot);

 	while (p_slot && (p_slot->device != device)) {
 		tmp_slot = p_slot;
 		p_slot = p_slot->next;
 		dbg("In while loop, p_slot = %p\n", p_slot);
 	}
 	if (p_slot == NULL) {
 		err("ERROR: pciehp_find_slot device=0x%x\n", device);
 		p_slot = tmp_slot;
 	}

 	return p_slot;
 }

 static inline int wait_for_ctrl_irq(struct controller *ctrl)
 {
 	int retval = 0;

 	DECLARE_WAITQUEUE(wait, current);

 	dbg("%s : start\n", __FUNCTION__);
 	add_wait_queue(&ctrl->queue, &wait);
 	if (!pciehp_poll_mode)
 		/* Sleep for up to 1 second */
 		msleep_interruptible(1000);
 	else
 		msleep_interruptible(2500);

 	remove_wait_queue(&ctrl->queue, &wait);
 	if (signal_pending(current))
 		retval =  -EINTR;

 	dbg("%s : end\n", __FUNCTION__);
 	return retval;
 }

 /* Puts node back in the resource list pointed to by head */
 static inline void return_resource(struct pci_resource **head, struct pci_resource *node)
 {
 	if (!node || !head)
 		return;
 	node->next = *head;
 	*head = node;
 }

 #define SLOT_NAME_SIZE 10

 static inline void make_slot_name(char *buffer, int buffer_size, struct slot *slot)
 {
 	snprintf(buffer, buffer_size, "%d", slot->number);
 }

 enum php_ctlr_type {
 	PCI,
 	ISA,
 	ACPI
 };

 typedef u8(*php_intr_callback_t) (unsigned int change_id, void *instance_id);

 int pcie_init(struct controller *ctrl, struct pcie_device *dev,
 		php_intr_callback_t attention_button_callback,
 		php_intr_callback_t switch_change_callback,
 		php_intr_callback_t presence_change_callback,
 		php_intr_callback_t power_fault_callback);


 /* This has no meaning for PCI Express, as there is only 1 slot per port */
 int pcie_get_ctlr_slot_config(struct controller *ctrl,
 		int *num_ctlr_slots,
 		int *first_device_num,
 		int *physical_slot_num,
 		u8 *ctrlcap);

 struct hpc_ops {
 	int	(*power_on_slot)	(struct slot *slot);
 	int	(*power_off_slot)	(struct slot *slot);
 	int	(*get_power_status)	(struct slot *slot, u8 *status);
 	int	(*get_attention_status)	(struct slot *slot, u8 *status);
 	int	(*set_attention_status)	(struct slot *slot, u8 status);
 	int	(*get_latch_status)	(struct slot *slot, u8 *status);
 	int	(*get_adapter_status)	(struct slot *slot, u8 *status);

 	int	(*get_max_bus_speed)	(struct slot *slot, enum pci_bus_speed *speed);
 	int	(*get_cur_bus_speed)	(struct slot *slot, enum pci_bus_speed *speed);

 	int	(*get_max_lnk_width)	(struct slot *slot, enum pcie_link_width *value);
 	int	(*get_cur_lnk_width)	(struct slot *slot, enum pcie_link_width *value);

 	int	(*query_power_fault)	(struct slot *slot);
 	void	(*green_led_on)		(struct slot *slot);
 	void	(*green_led_off)	(struct slot *slot);
 	void	(*green_led_blink)	(struct slot *slot);
 	void	(*release_ctlr)		(struct controller *ctrl);
 	int	(*check_lnk_status)	(struct controller *ctrl);
 };

 #endif				/* _PCIEHP_H */
	/*
	* PCI Express 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.
	* 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>
	*
	*/
	#ifndef _PCIEHP_H
	#define _PCIEHP_H

	#include <linux/types.h>
	#include <linux/pci.h>
	#include <linux/delay.h>
	#include <asm/semaphore.h>
	#include <asm/io.h>
	#include <linux/pcieport_if.h>
	#include "pci_hotplug.h"

	#define MY_NAME "pciehp"

	extern int pciehp_poll_mode;
	extern int pciehp_poll_time;
	extern int pciehp_debug;

	/#define dbg(format, arg...) do { if (pciehp_debug) printk(KERN_DEBUG "%s: " format, MY_NAME , ## arg); } while (0)/
	#define dbg(format, arg...) do { if (pciehp_debug) printk("%s: " format, MY_NAME , ## arg); } while (0)
	#define err(format, arg...) printk(KERN_ERR "%s: " format, MY_NAME , ## arg)
	#define info(format, arg...) printk(KERN_INFO "%s: " format, MY_NAME , ## arg)
	#define warn(format, arg...) printk(KERN_WARNING "%s: " format, MY_NAME , ## arg)

	struct pci_func {
	struct pci_func *next;
	u8 bus;
	u8 device;
	u8 function;
	u8 is_a_board;
	u16 status;
	u8 configured;
	u8 switch_save;
	u8 presence_save;
	u32 base_length[0x06];
	u8 base_type[0x06];
	u16 reserved2;
	u32 config_space[0x20];
	struct pci_resource *mem_head;
	struct pci_resource *p_mem_head;
	struct pci_resource *io_head;
	struct pci_resource *bus_head;
	struct pci_dev* pci_dev;
	};

	struct slot {
	struct slot *next;
	u8 bus;
	u8 device;
	u32 number;
	u8 is_a_board;
	u8 configured;
	u8 state;
	u8 switch_save;
	u8 presence_save;
	u32 capabilities;
	u16 reserved2;
	struct timer_list task_event;
	u8 hp_slot;
	struct controller *ctrl;
	struct hpc_ops *hpc_ops;
	struct hotplug_slot *hotplug_slot;
	struct list_head slot_list;
	};

	struct pci_resource {
	struct pci_resource * next;
	u32 base;
	u32 length;
	};

	struct event_info {
	u32 event_type;
	u8 hp_slot;
	};

	struct controller {
	struct controller *next;
	struct semaphore crit_sect; /* critical section semaphore */
	void hpc_ctlr_handle; / HPC controller handle */
	int num_slots; /* Number of slots on ctlr */
	int slot_num_inc; /* 1 or -1 */
	struct pci_resource *mem_head;
	struct pci_resource *p_mem_head;
	struct pci_resource *io_head;
	struct pci_resource *bus_head;
	struct pci_dev *pci_dev;
	struct pci_bus *pci_bus;
	struct event_info event_queue[10];
	struct slot *slot;
	struct hpc_ops *hpc_ops;
	wait_queue_head_t queue; /* sleep & wake process */
	u8 next_event;
	u8 seg;
	u8 bus;
	u8 device;
	u8 function;
	u8 rev;
	u8 slot_device_offset;
	u8 add_support;
	enum pci_bus_speed speed;
	u32 first_slot; /* First physical slot number / / PCIE only has 1 slot */
	u8 slot_bus; /* Bus where the slots handled by this controller sit */
	u8 ctrlcap;
	u16 vendor_id;
	u8 cap_base;
	};

	struct irq_mapping {
	u8 barber_pole;
	u8 valid_INT;
	u8 interrupt[4];
	};

	struct resource_lists {
	struct pci_resource *mem_head;
	struct pci_resource *p_mem_head;
	struct pci_resource *io_head;
	struct pci_resource *bus_head;
	struct irq_mapping *irqs;
	};

	#define INT_BUTTON_IGNORE 0
	#define INT_PRESENCE_ON 1
	#define INT_PRESENCE_OFF 2
	#define INT_SWITCH_CLOSE 3
	#define INT_SWITCH_OPEN 4
	#define INT_POWER_FAULT 5
	#define INT_POWER_FAULT_CLEAR 6
	#define INT_BUTTON_PRESS 7
	#define INT_BUTTON_RELEASE 8
	#define INT_BUTTON_CANCEL 9

	#define STATIC_STATE 0
	#define BLINKINGON_STATE 1
	#define BLINKINGOFF_STATE 2
	#define POWERON_STATE 3
	#define POWEROFF_STATE 4

	#define PCI_TO_PCI_BRIDGE_CLASS 0x00060400

	/* Error messages */
	#define INTERLOCK_OPEN 0x00000002
	#define ADD_NOT_SUPPORTED 0x00000003
	#define CARD_FUNCTIONING 0x00000005
	#define ADAPTER_NOT_SAME 0x00000006
	#define NO_ADAPTER_PRESENT 0x00000009
	#define NOT_ENOUGH_RESOURCES 0x0000000B
	#define DEVICE_TYPE_NOT_SUPPORTED 0x0000000C
	#define WRONG_BUS_FREQUENCY 0x0000000D
	#define POWER_FAILURE 0x0000000E

	#define REMOVE_NOT_SUPPORTED 0x00000003

	#define DISABLE_CARD 1

	/* Field definitions in Slot Capabilities Register */
	#define ATTN_BUTTN_PRSN 0x00000001
	#define PWR_CTRL_PRSN 0x00000002
	#define MRL_SENS_PRSN 0x00000004
	#define ATTN_LED_PRSN 0x00000008
	#define PWR_LED_PRSN 0x00000010
	#define HP_SUPR_RM_SUP 0x00000020

	#define ATTN_BUTTN(cap) (cap & ATTN_BUTTN_PRSN)
	#define POWER_CTRL(cap) (cap & PWR_CTRL_PRSN)
	#define MRL_SENS(cap) (cap & MRL_SENS_PRSN)
	#define ATTN_LED(cap) (cap & ATTN_LED_PRSN)
	#define PWR_LED(cap) (cap & PWR_LED_PRSN)
	#define HP_SUPR_RM(cap) (cap & HP_SUPR_RM_SUP)

	/*
	* error Messages
	*/
	#define msg_initialization_err "Initialization failure, error=%d\n"
	#define msg_HPC_rev_error "Unsupported revision of the PCI hot plug controller found.\n"
	#define msg_HPC_non_pcie "The PCI hot plug controller is not supported by this driver.\n"
	#define msg_HPC_not_supported "This system is not supported by this version of pciephd module. Upgrade to a newer version of pciehpd\n"
	#define msg_unable_to_save "Unable to store PCI hot plug add resource information. This system must be rebooted before adding any PCI devices.\n"
	#define msg_button_on "PCI slot #%d - powering on due to button press.\n"
	#define msg_button_off "PCI slot #%d - powering off due to button press.\n"
	#define msg_button_cancel "PCI slot #%d - action canceled due to button press.\n"
	#define msg_button_ignore "PCI slot #%d - button press ignored. (action in progress...)\n"

	/* controller functions */
	extern int pciehprm_find_available_resources (struct controller *ctrl);
	extern int pciehp_event_start_thread (void);
	extern void pciehp_event_stop_thread (void);
	extern struct pci_func *pciehp_slot_create (unsigned char busnumber);
	extern struct pci_func *pciehp_slot_find (unsigned char bus, unsigned char device, unsigned char index);
	extern int pciehp_enable_slot (struct slot *slot);
	extern int pciehp_disable_slot (struct slot *slot);

	extern u8 pciehp_handle_attention_button (u8 hp_slot, void *inst_id);
	extern u8 pciehp_handle_switch_change (u8 hp_slot, void *inst_id);
	extern u8 pciehp_handle_presence_change (u8 hp_slot, void *inst_id);
	extern u8 pciehp_handle_power_fault (u8 hp_slot, void *inst_id);
	/* extern void long_delay (int delay); */

	/* resource functions */
	extern int pciehp_resource_sort_and_combine (struct pci_resource **head);

	/* pci functions */
	extern int pciehp_set_irq (u8 bus_num, u8 dev_num, u8 int_pin, u8 irq_num);
	/extern int pciehp_get_bus_dev (struct controller ctrl, u8 bus_num, u8 dev_num, struct slot slot);/
	extern int pciehp_save_config (struct controller *ctrl, int busnumber, int num_ctlr_slots, int first_device_num);
	extern int pciehp_save_used_resources (struct controller ctrl, struct pci_func func, int flag);
	extern int pciehp_save_slot_config (struct controller ctrl, struct pci_func new_slot);
	extern void pciehp_destroy_board_resources (struct pci_func * func);
	extern int pciehp_return_board_resources (struct pci_func * func, struct resource_lists * resources);
	extern void pciehp_destroy_resource_list (struct resource_lists * resources);
	extern int pciehp_configure_device (struct controller* ctrl, struct pci_func* func);
	extern int pciehp_unconfigure_device (struct pci_func* func);


	/* Global variables */
	extern struct controller *pciehp_ctrl_list;
	extern struct pci_func *pciehp_slot_list[256];

	/* Inline functions */

	static inline struct slot pciehp_find_slot(struct controller ctrl, u8 device)
	{
	struct slot p_slot, tmp_slot = NULL;

	p_slot = ctrl->slot;

	dbg("p_slot = %p\n", p_slot);

	while (p_slot && (p_slot->device != device)) {
	tmp_slot = p_slot;
	p_slot = p_slot->next;
	dbg("In while loop, p_slot = %p\n", p_slot);
	}
	if (p_slot == NULL) {
	err("ERROR: pciehp_find_slot device=0x%x\n", device);
	p_slot = tmp_slot;
	}

	return p_slot;
	}

	static inline int wait_for_ctrl_irq(struct controller *ctrl)
	{
	int retval = 0;

	DECLARE_WAITQUEUE(wait, current);

	dbg("%s : start\n", __FUNCTION__);
	add_wait_queue(&ctrl->queue, &wait);
	if (!pciehp_poll_mode)
	/* Sleep for up to 1 second */
	msleep_interruptible(1000);
	else
	msleep_interruptible(2500);

	remove_wait_queue(&ctrl->queue, &wait);
	if (signal_pending(current))
	retval = -EINTR;

	dbg("%s : end\n", __FUNCTION__);
	return retval;
	}

	/* Puts node back in the resource list pointed to by head */
	static inline void return_resource(struct pci_resource *head, struct pci_resource node)
	{
	if (!node \|\| !head)
	return;
	node->next = *head;
	*head = node;
	}

	#define SLOT_NAME_SIZE 10

	static inline void make_slot_name(char buffer, int buffer_size, struct slot slot)
	{
	snprintf(buffer, buffer_size, "%d", slot->number);
	}

	enum php_ctlr_type {
	PCI,
	ISA,
	ACPI
	};

	typedef u8(php_intr_callback_t) (unsigned int change_id, void instance_id);

	int pcie_init(struct controller ctrl, struct pcie_device dev,
	php_intr_callback_t attention_button_callback,
	php_intr_callback_t switch_change_callback,
	php_intr_callback_t presence_change_callback,
	php_intr_callback_t power_fault_callback);


	/* This has no meaning for PCI Express, as there is only 1 slot per port */
	int pcie_get_ctlr_slot_config(struct controller *ctrl,
	int *num_ctlr_slots,
	int *first_device_num,
	int *physical_slot_num,
	u8 *ctrlcap);

	struct hpc_ops {
	int (power_on_slot) (struct slot slot);
	int (power_off_slot) (struct slot slot);
	int (get_power_status) (struct slot slot, u8 *status);
	int (get_attention_status) (struct slot slot, u8 *status);
	int (set_attention_status) (struct slot slot, u8 status);
	int (get_latch_status) (struct slot slot, u8 *status);
	int (get_adapter_status) (struct slot slot, u8 *status);

	int (get_max_bus_speed) (struct slot slot, enum pci_bus_speed *speed);
	int (get_cur_bus_speed) (struct slot slot, enum pci_bus_speed *speed);

	int (get_max_lnk_width) (struct slot slot, enum pcie_link_width *value);
	int (get_cur_lnk_width) (struct slot slot, enum pcie_link_width *value);

	int (query_power_fault) (struct slot slot);
	void (green_led_on) (struct slot slot);
	void (green_led_off) (struct slot slot);
	void (green_led_blink) (struct slot slot);
	void (release_ctlr) (struct controller ctrl);
	int (check_lnk_status) (struct controller ctrl);
	};

	#endif /* _PCIEHP_H */