| /* 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 |