112 lines
4.4 KiB
C
112 lines
4.4 KiB
C
|
/* 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
|
||
|
|
* @slot_list: internal list used to track hotplug PCI slots
|
||
|
|
* @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 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
|