pci_hotplug.h (4458B)
1/* SPDX-License-Identifier: GPL-2.0+ */ 2/* 3 * PCI HotPlug Core Functions 4 * 5 * Copyright (C) 1995,2001 Compaq Computer Corporation 6 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com) 7 * Copyright (C) 2001 IBM Corp. 8 * 9 * All rights reserved. 10 * 11 * Send feedback to <kristen.c.accardi@intel.com> 12 * 13 */ 14#ifndef _PCI_HOTPLUG_H 15#define _PCI_HOTPLUG_H 16 17/** 18 * struct hotplug_slot_ops -the callbacks that the hotplug pci core can use 19 * @enable_slot: Called when the user wants to enable a specific pci slot 20 * @disable_slot: Called when the user wants to disable a specific pci slot 21 * @set_attention_status: Called to set the specific slot's attention LED to 22 * the specified value 23 * @hardware_test: Called to run a specified hardware test on the specified 24 * slot. 25 * @get_power_status: Called to get the current power status of a slot. 26 * @get_attention_status: Called to get the current attention status of a slot. 27 * @get_latch_status: Called to get the current latch status of a slot. 28 * @get_adapter_status: Called to get see if an adapter is present in the slot or not. 29 * @reset_slot: Optional interface to allow override of a bus reset for the 30 * slot for cases where a secondary bus reset can result in spurious 31 * hotplug events or where a slot can be reset independent of the bus. 32 * 33 * The table of function pointers that is passed to the hotplug pci core by a 34 * hotplug pci driver. These functions are called by the hotplug pci core when 35 * the user wants to do something to a specific slot (query it for information, 36 * set an LED, enable / disable power, etc.) 37 */ 38struct hotplug_slot_ops { 39 int (*enable_slot) (struct hotplug_slot *slot); 40 int (*disable_slot) (struct hotplug_slot *slot); 41 int (*set_attention_status) (struct hotplug_slot *slot, u8 value); 42 int (*hardware_test) (struct hotplug_slot *slot, u32 value); 43 int (*get_power_status) (struct hotplug_slot *slot, u8 *value); 44 int (*get_attention_status) (struct hotplug_slot *slot, u8 *value); 45 int (*get_latch_status) (struct hotplug_slot *slot, u8 *value); 46 int (*get_adapter_status) (struct hotplug_slot *slot, u8 *value); 47 int (*reset_slot) (struct hotplug_slot *slot, bool probe); 48}; 49 50/** 51 * struct hotplug_slot - used to register a physical slot with the hotplug pci core 52 * @ops: pointer to the &struct hotplug_slot_ops to be used for this slot 53 * @slot_list: internal list used to track hotplug PCI slots 54 * @pci_slot: represents a physical slot 55 * @owner: The module owner of this structure 56 * @mod_name: The module name (KBUILD_MODNAME) of this structure 57 */ 58struct hotplug_slot { 59 const struct hotplug_slot_ops *ops; 60 61 /* Variables below this are for use only by the hotplug pci core. */ 62 struct list_head slot_list; 63 struct pci_slot *pci_slot; 64 struct module *owner; 65 const char *mod_name; 66}; 67 68static inline const char *hotplug_slot_name(const struct hotplug_slot *slot) 69{ 70 return pci_slot_name(slot->pci_slot); 71} 72 73int __pci_hp_register(struct hotplug_slot *slot, struct pci_bus *pbus, int nr, 74 const char *name, struct module *owner, 75 const char *mod_name); 76int __pci_hp_initialize(struct hotplug_slot *slot, struct pci_bus *bus, int nr, 77 const char *name, struct module *owner, 78 const char *mod_name); 79int pci_hp_add(struct hotplug_slot *slot); 80 81void pci_hp_del(struct hotplug_slot *slot); 82void pci_hp_destroy(struct hotplug_slot *slot); 83void pci_hp_deregister(struct hotplug_slot *slot); 84 85/* use a define to avoid include chaining to get THIS_MODULE & friends */ 86#define pci_hp_register(slot, pbus, devnr, name) \ 87 __pci_hp_register(slot, pbus, devnr, name, THIS_MODULE, KBUILD_MODNAME) 88#define pci_hp_initialize(slot, bus, nr, name) \ 89 __pci_hp_initialize(slot, bus, nr, name, THIS_MODULE, KBUILD_MODNAME) 90 91#ifdef CONFIG_ACPI 92#include <linux/acpi.h> 93bool pciehp_is_native(struct pci_dev *bridge); 94int acpi_get_hp_hw_control_from_firmware(struct pci_dev *bridge); 95bool shpchp_is_native(struct pci_dev *bridge); 96int acpi_pci_check_ejectable(struct pci_bus *pbus, acpi_handle handle); 97int acpi_pci_detect_ejectable(acpi_handle handle); 98#else 99static inline int acpi_get_hp_hw_control_from_firmware(struct pci_dev *bridge) 100{ 101 return 0; 102} 103static inline bool pciehp_is_native(struct pci_dev *bridge) { return true; } 104static inline bool shpchp_is_native(struct pci_dev *bridge) { return true; } 105#endif 106 107static inline bool hotplug_is_native(struct pci_dev *bridge) 108{ 109 return pciehp_is_native(bridge) || shpchp_is_native(bridge); 110} 111#endif