/*
   * 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.
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or (at
   * your option) any later version.
   *
   * This program is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
   * NON INFRINGEMENT.  See the GNU General Public License for more
   * details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   *

   * Send feedback to <kristen.c.accardi@intel.com>

   *
   */
  #ifndef _PCI_HOTPLUG_H
  #define _PCI_HOTPLUG_H

  /* These values come from the PCI Express Spec */
  enum pcie_link_width {
  	PCIE_LNK_WIDTH_RESRV	= 0x00,
  	PCIE_LNK_X1		= 0x01,
  	PCIE_LNK_X2		= 0x02,
  	PCIE_LNK_X4		= 0x04,
  	PCIE_LNK_X8		= 0x08,
  	PCIE_LNK_X12		= 0x0C,
  	PCIE_LNK_X16		= 0x10,
  	PCIE_LNK_X32		= 0x20,
  	PCIE_LNK_WIDTH_UNKNOWN  = 0xFF,
  };

  /**
   * struct hotplug_slot_ops -the callbacks that the hotplug pci core can use
   * @owner: The module owner of this structure

   * @mod_name: The module name (KBUILD_MODNAME) of this structure

   * @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.
   * 	If this field is NULL, the value passed in the struct hotplug_slot_info
   * 	will be used when this value is requested by a user.
   * @get_attention_status: Called to get the current attention status of a slot.
   *	If this field is NULL, the value passed in the struct hotplug_slot_info
   *	will be used when this value is requested by a user.
   * @get_latch_status: Called to get the current latch status of a slot.
   *	If this field is NULL, the value passed in the struct hotplug_slot_info
   *	will be used when this value is requested by a user.
   * @get_adapter_status: Called to get see if an adapter is present in the slot or not.
   *	If this field is NULL, the value passed in the struct hotplug_slot_info
   *	will be used when this value is requested by a user.

   *
   * 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 {
  	struct module *owner;

  	const char *mod_name;

  	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);

  };
  
  /**
   * struct hotplug_slot_info - used to notify the hotplug pci core of the state of the slot

   * @power_status: if power is enabled or not (1/0)

   * @attention_status: if the attention light is enabled or not (1/0)
   * @latch_status: if the latch (if any) is open or closed (1/0)

   * @adapter_status: if there is a pci board present in the slot or not (1/0)

   *
   * Used to notify the hotplug pci core of the status of a specific slot.
   */
  struct hotplug_slot_info {
  	u8	power_status;
  	u8	attention_status;
  	u8	latch_status;
  	u8	adapter_status;

  };
  
  /**
   * 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

   * @info: pointer to the &struct hotplug_slot_info for the initial values for

   * this slot.
   * @release: called during pci_hp_deregister to free memory allocated in a
   * hotplug_slot structure.
   * @private: used by the hotplug pci controller driver to store whatever it
   * needs.
   */
  struct hotplug_slot {

  	struct hotplug_slot_ops		*ops;
  	struct hotplug_slot_info	*info;
  	void (*release) (struct hotplug_slot *slot);
  	void				*private;
  
  	/* Variables below this are for use only by the hotplug pci core. */
  	struct list_head		slot_list;

  	struct pci_slot			*pci_slot;

  };
  #define to_hotplug_slot(n) container_of(n, struct hotplug_slot, kobj)

  static inline const char *hotplug_slot_name(const struct hotplug_slot *slot)
  {
  	return pci_slot_name(slot->pci_slot);
  }

  extern int __pci_hp_register(struct hotplug_slot *slot, struct pci_bus *pbus,
  			     int nr, const char *name,
  			     struct module *owner, const char *mod_name);

  extern int pci_hp_deregister(struct hotplug_slot *slot);

  extern int __must_check pci_hp_change_slot_info	(struct hotplug_slot *slot,
  						 struct hotplug_slot_info *info);

  static inline int pci_hp_register(struct hotplug_slot *slot,
  				  struct pci_bus *pbus,
  				  int devnr, const char *name)
  {
  	return __pci_hp_register(slot, pbus, devnr, name,
  				 THIS_MODULE, KBUILD_MODNAME);
  }

  /* PCI Setting Record (Type 0) */
  struct hpp_type0 {
  	u32 revision;
  	u8  cache_line_size;
  	u8  latency_timer;
  	u8  enable_serr;
  	u8  enable_perr;
  };
  
  /* PCI-X Setting Record (Type 1) */
  struct hpp_type1 {
  	u32 revision;
  	u8  max_mem_read;
  	u8  avg_max_split;
  	u16 tot_max_split;
  };
  
  /* PCI Express Setting Record (Type 2) */
  struct hpp_type2 {
  	u32 revision;
  	u32 unc_err_mask_and;
  	u32 unc_err_mask_or;
  	u32 unc_err_sever_and;
  	u32 unc_err_sever_or;
  	u32 cor_err_mask_and;
  	u32 cor_err_mask_or;
  	u32 adv_err_cap_and;
  	u32 adv_err_cap_or;
  	u16 pci_exp_devctl_and;
  	u16 pci_exp_devctl_or;
  	u16 pci_exp_lnkctl_and;
  	u16 pci_exp_lnkctl_or;
  	u32 sec_unc_err_sever_and;
  	u32 sec_unc_err_sever_or;
  	u32 sec_unc_err_mask_and;
  	u32 sec_unc_err_mask_or;
  };

  struct hotplug_params {

  	struct hpp_type0 *t0;		/* Type0: NULL if not available */
  	struct hpp_type1 *t1;		/* Type1: NULL if not available */
  	struct hpp_type2 *t2;		/* Type2: NULL if not available */
  	struct hpp_type0 type0_data;
  	struct hpp_type1 type1_data;
  	struct hpp_type2 type2_data;

  };
  
  #ifdef CONFIG_ACPI
  #include <acpi/acpi.h>
  #include <acpi/acpi_bus.h>

  int pci_get_hp_params(struct pci_dev *dev, struct hotplug_params *hpp);

  int acpi_get_hp_hw_control_from_firmware(struct pci_dev *dev, u32 flags);

  int acpi_pci_check_ejectable(struct pci_bus *pbus, acpi_handle handle);

  int acpi_pci_detect_ejectable(acpi_handle handle);

  #else
  static inline int pci_get_hp_params(struct pci_dev *dev,
  				    struct hotplug_params *hpp)
  {
  	return -ENODEV;
  }

  #endif

  
  void pci_configure_slot(struct pci_dev *dev);

  #endif