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include/linux/pci_hotplug.h
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/* 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, int 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
* @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 list_head slot_list;
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 pciehp_is_native(bridge) || shpchp_is_native(bridge);
}
#endif
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