[mirror_ubuntu-bionic-kernel.git] / drivers / pci / hotplug / 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/pci_hotplug.h>
#include <linux/delay.h>
#include <linux/sched.h>		/* signal_pending() */
#include <linux/pcieport_if.h>
#include <linux/mutex.h>

#define MY_NAME	"pciehp"

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

/*#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)

#define SLOT_NAME_SIZE 10
struct slot {
	u8 bus;
	u8 device;
	u32 number;
	u8 state;
	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;
	char name[SLOT_NAME_SIZE];
};

struct event_info {
	u32 event_type;
	u8 hp_slot;
};

typedef u8(*php_intr_callback_t) (u8 hp_slot, void *instance_id);

struct php_ctlr_state_s {
	struct php_ctlr_state_s *pnext;
	struct pci_dev *pci_dev;
	unsigned int irq;
	unsigned long flags;				/* spinlock's */
	u32 slot_device_offset;
	u32 num_slots;
    	struct timer_list	int_poll_timer;		/* Added for poll event */
	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;
	void 			*callback_instance_id;
	struct ctrl_reg 	*creg;				/* Ptr to controller register space */
};

#define MAX_EVENTS		10
struct controller {
	struct controller *next;
	struct mutex crit_sect;		/* critical section mutex */
	struct mutex ctrl_lock;		/* controller lock */
	struct php_ctlr_state_s *hpc_ctlr_handle; /* HPC controller handle */
	int num_slots;			/* Number of slots on ctlr */
	int slot_num_inc;		/* 1 or -1 */
	struct pci_dev *pci_dev;
	struct pci_bus *pci_bus;
	struct list_head slot_list;
	struct event_info event_queue[MAX_EVENTS];
	struct slot *slot;
	struct hpc_ops *hpc_ops;
	wait_queue_head_t queue;	/* sleep & wake process */
	u8 next_event;
	u8 bus;
	u8 device;
	u8 function;
	u8 slot_device_offset;
	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;
};

#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_button_on		"PCI slot #%s - powering on due to button press.\n"
#define msg_button_off		"PCI slot #%s - powering off due to button press.\n"
#define msg_button_cancel	"PCI slot #%s - action canceled due to button press.\n"
#define msg_button_ignore	"PCI slot #%s - button press ignored.  (action in progress...)\n"

/* controller functions */
extern int	pciehp_event_start_thread	(void);
extern void	pciehp_event_stop_thread	(void);
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); */

/* pci functions */
extern int	pciehp_configure_device		(struct slot *p_slot);
extern int	pciehp_unconfigure_device	(struct slot *p_slot);


/* Global variables */
extern struct controller *pciehp_ctrl_list;

/* Inline functions */

static inline struct slot *pciehp_find_slot(struct controller *ctrl, u8 device)
{
	struct slot *slot;

	list_for_each_entry(slot, &ctrl->slot_list, slot_list) {
		if (slot->device == device)
			return slot;
	}

	err("%s: slot (device=0x%x) not found\n", __FUNCTION__, device);
	return NULL;
}

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

	DECLARE_WAITQUEUE(wait, current);

	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;

	return retval;
}

enum php_ctlr_type {
	PCI,
	ISA,
	ACPI
};

int pcie_init(struct controller *ctrl, struct pcie_device *dev);

/* 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);
};


#ifdef CONFIG_ACPI
#include <acpi/acpi.h>
#include <acpi/acpi_bus.h>
#include <acpi/actypes.h>
#include <linux/pci-acpi.h>

#define pciehp_get_hp_hw_control_from_firmware(dev) \
	pciehp_acpi_get_hp_hw_control_from_firmware(dev)
static inline int pciehp_get_hp_params_from_firmware(struct pci_dev *dev,
			struct hotplug_params *hpp)
{
	if (ACPI_FAILURE(acpi_get_hp_params_from_firmware(dev->bus, hpp)))
		return -ENODEV;
	return 0;
}
#else
#define pciehp_get_hp_hw_control_from_firmware(dev) 	0
#define pciehp_get_hp_params_from_firmware(dev, hpp)    (-ENODEV)
#endif 				/* CONFIG_ACPI */
#endif				/* _PCIEHP_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* PCI Express Hot Plug Controller Driver
	3	*
	4	* Copyright (C) 1995,2001 Compaq Computer Corporation
	5	* Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
	6	* Copyright (C) 2001 IBM Corp.
	7	* Copyright (C) 2003-2004 Intel Corporation
	8	*
	9	* All rights reserved.
	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License as published by
	13	* the Free Software Foundation; either version 2 of the License, or (at
	14	* your option) any later version.
	15	*
	16	* This program is distributed in the hope that it will be useful, but
	17	* WITHOUT ANY WARRANTY; without even the implied warranty of
	18	* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
	19	* NON INFRINGEMENT. See the GNU General Public License for more
	20	* details.
	21	*
	22	* You should have received a copy of the GNU General Public License
	23	* along with this program; if not, write to the Free Software
	24	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	25	*
8cf4c195	26	* Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com>
1da177e4 LT	27	*
	28	*/
	29	#ifndef _PCIEHP_H
	30	#define _PCIEHP_H
	31
	32	#include <linux/types.h>
	33	#include <linux/pci.h>
7a54f25c	34	#include <linux/pci_hotplug.h>
1da177e4	35	#include <linux/delay.h>
de25968c	36	#include <linux/sched.h> /* signal_pending() */
1da177e4	37	#include <linux/pcieport_if.h>
6aa4cdd0	38	#include <linux/mutex.h>
1da177e4 LT	39
	40	#define MY_NAME "pciehp"
	41
	42	extern int pciehp_poll_mode;
	43	extern int pciehp_poll_time;
	44	extern int pciehp_debug;
a3a45ec8	45	extern int pciehp_force;
1da177e4 LT	46
	47	/#define dbg(format, arg...) do { if (pciehp_debug) printk(KERN_DEBUG "%s: " format, MY_NAME , ## arg); } while (0)/
	48	#define dbg(format, arg...) do { if (pciehp_debug) printk("%s: " format, MY_NAME , ## arg); } while (0)
	49	#define err(format, arg...) printk(KERN_ERR "%s: " format, MY_NAME , ## arg)
	50	#define info(format, arg...) printk(KERN_INFO "%s: " format, MY_NAME , ## arg)
	51	#define warn(format, arg...) printk(KERN_WARNING "%s: " format, MY_NAME , ## arg)
	52
a0b17257	53	#define SLOT_NAME_SIZE 10
1da177e4	54	struct slot {
1da177e4 LT	55	u8 bus;
	56	u8 device;
	57	u32 number;
1da177e4	58	u8 state;
1da177e4 LT	59	struct timer_list task_event;
	60	u8 hp_slot;
	61	struct controller *ctrl;
	62	struct hpc_ops *hpc_ops;
	63	struct hotplug_slot *hotplug_slot;
	64	struct list_head slot_list;
a0b17257	65	char name[SLOT_NAME_SIZE];
1da177e4 LT	66	};
1da177e4 LT	67
1da177e4 LT	68	struct event_info {
	69	u32 event_type;
	70	u8 hp_slot;
	71	};
	72
ed6cbcf2 RS	73	typedef u8(php_intr_callback_t) (u8 hp_slot, void instance_id);
	74
	75	struct php_ctlr_state_s {
	76	struct php_ctlr_state_s *pnext;
	77	struct pci_dev *pci_dev;
	78	unsigned int irq;
	79	unsigned long flags; /* spinlock's */
	80	u32 slot_device_offset;
	81	u32 num_slots;
	82	struct timer_list int_poll_timer; /* Added for poll event */
	83	php_intr_callback_t attention_button_callback;
	84	php_intr_callback_t switch_change_callback;
	85	php_intr_callback_t presence_change_callback;
	86	php_intr_callback_t power_fault_callback;
	87	void *callback_instance_id;
	88	struct ctrl_reg creg; / Ptr to controller register space */
	89	};
	90
	91	#define MAX_EVENTS 10
1da177e4 LT	92	struct controller {
1da177e4 LT	93	struct controller *next;
6aa4cdd0	94	struct mutex crit_sect; /* critical section mutex */
dd5619cb	95	struct mutex ctrl_lock; /* controller lock */
ed6cbcf2	96	struct php_ctlr_state_s hpc_ctlr_handle; / HPC controller handle */
1da177e4 LT	97	int num_slots; /* Number of slots on ctlr */
1da177e4 LT	98	int slot_num_inc; /* 1 or -1 */
1da177e4 LT	99	struct pci_dev *pci_dev;
1da177e4 LT	100	struct pci_bus *pci_bus;
2410fa4e	101	struct list_head slot_list;
ed6cbcf2	102	struct event_info event_queue[MAX_EVENTS];
1da177e4 LT	103	struct slot *slot;
	104	struct hpc_ops *hpc_ops;
	105	wait_queue_head_t queue; /* sleep & wake process */
	106	u8 next_event;
1da177e4 LT	107	u8 bus;
	108	u8 device;
	109	u8 function;
1da177e4	110	u8 slot_device_offset;
1da177e4 LT	111	u32 first_slot; /* First physical slot number / / PCIE only has 1 slot */
	112	u8 slot_bus; /* Bus where the slots handled by this controller sit */
	113	u8 ctrlcap;
	114	u16 vendor_id;
8b245e45	115	u8 cap_base;
1da177e4 LT	116	};
1da177e4 LT	117
1da177e4 LT	118	#define INT_BUTTON_IGNORE 0
	119	#define INT_PRESENCE_ON 1
	120	#define INT_PRESENCE_OFF 2
	121	#define INT_SWITCH_CLOSE 3
	122	#define INT_SWITCH_OPEN 4
	123	#define INT_POWER_FAULT 5
	124	#define INT_POWER_FAULT_CLEAR 6
	125	#define INT_BUTTON_PRESS 7
	126	#define INT_BUTTON_RELEASE 8
	127	#define INT_BUTTON_CANCEL 9
	128
	129	#define STATIC_STATE 0
	130	#define BLINKINGON_STATE 1
	131	#define BLINKINGOFF_STATE 2
	132	#define POWERON_STATE 3
	133	#define POWEROFF_STATE 4
	134
	135	#define PCI_TO_PCI_BRIDGE_CLASS 0x00060400
	136
	137	/* Error messages */
	138	#define INTERLOCK_OPEN 0x00000002
	139	#define ADD_NOT_SUPPORTED 0x00000003
	140	#define CARD_FUNCTIONING 0x00000005
	141	#define ADAPTER_NOT_SAME 0x00000006
	142	#define NO_ADAPTER_PRESENT 0x00000009
	143	#define NOT_ENOUGH_RESOURCES 0x0000000B
	144	#define DEVICE_TYPE_NOT_SUPPORTED 0x0000000C
	145	#define WRONG_BUS_FREQUENCY 0x0000000D
	146	#define POWER_FAILURE 0x0000000E
	147
	148	#define REMOVE_NOT_SUPPORTED 0x00000003
	149
	150	#define DISABLE_CARD 1
	151
	152	/* Field definitions in Slot Capabilities Register */
	153	#define ATTN_BUTTN_PRSN 0x00000001
	154	#define PWR_CTRL_PRSN 0x00000002
	155	#define MRL_SENS_PRSN 0x00000004
	156	#define ATTN_LED_PRSN 0x00000008
	157	#define PWR_LED_PRSN 0x00000010
	158	#define HP_SUPR_RM_SUP 0x00000020
	159
	160	#define ATTN_BUTTN(cap) (cap & ATTN_BUTTN_PRSN)
	161	#define POWER_CTRL(cap) (cap & PWR_CTRL_PRSN)
	162	#define MRL_SENS(cap) (cap & MRL_SENS_PRSN)
	163	#define ATTN_LED(cap) (cap & ATTN_LED_PRSN)
	164	#define PWR_LED(cap) (cap & PWR_LED_PRSN)
	165	#define HP_SUPR_RM(cap) (cap & HP_SUPR_RM_SUP)
	166
	167	/*
	168	* error Messages
	169	*/
	170	#define msg_initialization_err "Initialization failure, error=%d\n"
49ed2b49 KK	171	#define msg_button_on "PCI slot #%s - powering on due to button press.\n"
	172	#define msg_button_off "PCI slot #%s - powering off due to button press.\n"
	173	#define msg_button_cancel "PCI slot #%s - action canceled due to button press.\n"
	174	#define msg_button_ignore "PCI slot #%s - button press ignored. (action in progress...)\n"
1da177e4 LT	175
1da177e4 LT	176	/* controller functions */
1da177e4 LT	177	extern int pciehp_event_start_thread (void);
1da177e4 LT	178	extern void pciehp_event_stop_thread (void);
1da177e4 LT	179	extern int pciehp_enable_slot (struct slot *slot);
	180	extern int pciehp_disable_slot (struct slot *slot);
	181
	182	extern u8 pciehp_handle_attention_button (u8 hp_slot, void *inst_id);
	183	extern u8 pciehp_handle_switch_change (u8 hp_slot, void *inst_id);
	184	extern u8 pciehp_handle_presence_change (u8 hp_slot, void *inst_id);
	185	extern u8 pciehp_handle_power_fault (u8 hp_slot, void *inst_id);
	186	/* extern void long_delay (int delay); */
	187
1da177e4	188	/* pci functions */
ca22a5e4 RS	189	extern int pciehp_configure_device (struct slot *p_slot);
ca22a5e4 RS	190	extern int pciehp_unconfigure_device (struct slot *p_slot);
a8a2be94	191
1da177e4 LT	192
	193
	194	/* Global variables */
	195	extern struct controller *pciehp_ctrl_list;
1da177e4 LT	196
	197	/* Inline functions */
	198
	199	static inline struct slot pciehp_find_slot(struct controller ctrl, u8 device)
	200	{
2410fa4e	201	struct slot *slot;
1da177e4	202
2410fa4e KK	203	list_for_each_entry(slot, &ctrl->slot_list, slot_list) {
	204	if (slot->device == device)
	205	return slot;
1da177e4 LT	206	}
1da177e4 LT	207
2410fa4e KK	208	err("%s: slot (device=0x%x) not found\n", __FUNCTION__, device);
2410fa4e KK	209	return NULL;
1da177e4 LT	210	}
	211
	212	static inline int wait_for_ctrl_irq(struct controller *ctrl)
	213	{
	214	int retval = 0;
	215
	216	DECLARE_WAITQUEUE(wait, current);
	217
1da177e4 LT	218	add_wait_queue(&ctrl->queue, &wait);
	219	if (!pciehp_poll_mode)
	220	/* Sleep for up to 1 second */
	221	msleep_interruptible(1000);
	222	else
	223	msleep_interruptible(2500);
	224
	225	remove_wait_queue(&ctrl->queue, &wait);
	226	if (signal_pending(current))
	227	retval = -EINTR;
	228
1da177e4 LT	229	return retval;
	230	}
	231
1da177e4 LT	232	enum php_ctlr_type {
	233	PCI,
	234	ISA,
	235	ACPI
	236	};
	237
ed6cbcf2	238	int pcie_init(struct controller ctrl, struct pcie_device dev);
1da177e4 LT	239
	240	/* This has no meaning for PCI Express, as there is only 1 slot per port */
	241	int pcie_get_ctlr_slot_config(struct controller *ctrl,
	242	int *num_ctlr_slots,
	243	int *first_device_num,
	244	int *physical_slot_num,
	245	u8 *ctrlcap);
	246
	247	struct hpc_ops {
	248	int (power_on_slot) (struct slot slot);
	249	int (power_off_slot) (struct slot slot);
	250	int (get_power_status) (struct slot slot, u8 *status);
	251	int (get_attention_status) (struct slot slot, u8 *status);
	252	int (set_attention_status) (struct slot slot, u8 status);
	253	int (get_latch_status) (struct slot slot, u8 *status);
	254	int (get_adapter_status) (struct slot slot, u8 *status);
	255
	256	int (get_max_bus_speed) (struct slot slot, enum pci_bus_speed *speed);
	257	int (get_cur_bus_speed) (struct slot slot, enum pci_bus_speed *speed);
	258
	259	int (get_max_lnk_width) (struct slot slot, enum pcie_link_width *value);
	260	int (get_cur_lnk_width) (struct slot slot, enum pcie_link_width *value);
	261
	262	int (query_power_fault) (struct slot slot);
	263	void (green_led_on) (struct slot slot);
	264	void (green_led_off) (struct slot slot);
	265	void (green_led_blink) (struct slot slot);
	266	void (release_ctlr) (struct controller ctrl);
	267	int (check_lnk_status) (struct controller ctrl);
	268	};
	269
783c49fc KA	270
783c49fc KA	271	#ifdef CONFIG_ACPI
e50d1088 KCA	272	#include <acpi/acpi.h>
	273	#include <acpi/acpi_bus.h>
	274	#include <acpi/actypes.h>
	275	#include <linux/pci-acpi.h>
	276
783c49fc KA	277	#define pciehp_get_hp_hw_control_from_firmware(dev) \
	278	pciehp_acpi_get_hp_hw_control_from_firmware(dev)
	279	static inline int pciehp_get_hp_params_from_firmware(struct pci_dev *dev,
	280	struct hotplug_params *hpp)
	281	{
7430e34c	282	if (ACPI_FAILURE(acpi_get_hp_params_from_firmware(dev->bus, hpp)))
783c49fc KA	283	return -ENODEV;
	284	return 0;
	285	}
	286	#else
	287	#define pciehp_get_hp_hw_control_from_firmware(dev) 0
	288	#define pciehp_get_hp_params_from_firmware(dev, hpp) (-ENODEV)
	289	#endif /* CONFIG_ACPI */
1da177e4	290	#endif /* _PCIEHP_H */