/* SPDX-License-Identifier: GPL-2.0+ */
/*
* PCI HotPlug Core Functions
*
* Copyright ( C ) 1995 , 2001 Compaq Computer Corporation
* Copyright ( C ) 2001 Greg Kroah - Hartman ( greg @ kroah . com )
* Copyright ( C ) 2001 IBM Corp .
*
* All rights reserved .
*
* Send feedback to < kristen . c . accardi @ intel . com >
*
*/
#ifndef _PCI_HOTPLUG_H
#define _PCI_HOTPLUG_H
/**
* struct hotplug_slot_ops - the callbacks that the hotplug pci core can use
* @ enable_slot : Called when the user wants to enable a specific pci slot
* @ disable_slot : Called when the user wants to disable a specific pci slot
* @ set_attention_status : Called to set the specific slot ' s attention LED to
* the specified value
* @ hardware_test : Called to run a specified hardware test on the specified
* slot .
* @ get_power_status : Called to get the current power status of a slot .
* @ get_attention_status : Called to get the current attention status of a slot .
* @ get_latch_status : Called to get the current latch status of a slot .
* @ get_adapter_status : Called to get see if an adapter is present in the slot or not .
* @ reset_slot : Optional interface to allow override of a bus reset for the
* slot for cases where a secondary bus reset can result in spurious
* hotplug events or where a slot can be reset independent of the bus .
*
* The table of function pointers that is passed to the hotplug pci core by a
* hotplug pci driver . These functions are called by the hotplug pci core when
* the user wants to do something to a specific slot ( query it for information ,
* set an LED , enable / disable power , etc . )
*/
struct hotplug_slot_ops {
int (*enable_slot) (struct hotplug_slot *slot);
int (*disable_slot) (struct hotplug_slot *slot);
int (*set_attention_status) (struct hotplug_slot *slot, u8 value);
int (*hardware_test) (struct hotplug_slot *slot, u32 value);
int (*get_power_status) (struct hotplug_slot *slot, u8 *value);
int (*get_attention_status) (struct hotplug_slot *slot, u8 *value);
int (*get_latch_status) (struct hotplug_slot *slot, u8 *value);
int (*get_adapter_status) (struct hotplug_slot *slot, u8 *value);
int (*reset_slot) (struct hotplug_slot *slot, bool probe);
};
/**
* struct hotplug_slot - used to register a physical slot with the hotplug pci core
* @ ops : pointer to the & struct hotplug_slot_ops to be used for this slot
* @ pci_slot : represents a physical slot
* @ owner : The module owner of this structure
* @ mod_name : The module name ( KBUILD_MODNAME ) of this structure
*/
struct hotplug_slot {
const struct hotplug_slot_ops *ops;
/* Variables below this are for use only by the hotplug pci core. */
struct pci_slot *pci_slot;
struct module *owner;
const char *mod_name;
};
static inline const char *hotplug_slot_name(const struct hotplug_slot *slot)
{
return pci_slot_name(slot->pci_slot);
}
int __pci_hp_register(struct hotplug_slot *slot, struct pci_bus *pbus, int nr,
const char *name, struct module *owner,
const char *mod_name);
int __pci_hp_initialize(struct hotplug_slot *slot, struct pci_bus *bus, int nr,
const char *name, struct module *owner,
const char *mod_name);
int pci_hp_add(struct hotplug_slot *slot);
void pci_hp_del(struct hotplug_slot *slot);
void pci_hp_destroy(struct hotplug_slot *slot);
void pci_hp_deregister(struct hotplug_slot *slot);
/* use a define to avoid include chaining to get THIS_MODULE & friends */
#define pci_hp_register(slot, pbus, devnr, name) \
__pci_hp_register(slot, pbus, devnr, name, THIS_MODULE, KBUILD_MODNAME)
#define pci_hp_initialize(slot, bus, nr, name) \
__pci_hp_initialize(slot, bus, nr, name, THIS_MODULE, KBUILD_MODNAME)
#ifdef CONFIG_ACPI
#include <linux/acpi.h>
bool pciehp_is_native(struct pci_dev *bridge);
int acpi_get_hp_hw_control_from_firmware(struct pci_dev *bridge);
bool shpchp_is_native(struct pci_dev *bridge);
int acpi_pci_check_ejectable(struct pci_bus *pbus, acpi_handle handle);
int acpi_pci_detect_ejectable(acpi_handle handle);
#else
static inline int acpi_get_hp_hw_control_from_firmware(struct pci_dev *bridge)
{
return 0 ;
}
static inline bool pciehp_is_native(struct pci_dev *bridge) { return true ; }
static inline bool shpchp_is_native(struct pci_dev *bridge) { return true ; }
#endif
static inline bool hotplug_is_native(struct pci_dev *bridge)
{
return (bridge->is_pciehp && pciehp_is_native(bridge)) ||
shpchp_is_native(bridge);
}
#endif
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