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/*

 * 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 Hotplug Spec */

enum pci_bus_speed {

        PCI_SPEED_33MHz                 = 0x00,

        PCI_SPEED_66MHz                 = 0x01,

        PCI_SPEED_66MHz_PCIX            = 0x02,

        PCI_SPEED_100MHz_PCIX           = 0x03,

        PCI_SPEED_133MHz_PCIX           = 0x04,

        PCI_SPEED_66MHz_PCIX_ECC        = 0x05,

        PCI_SPEED_100MHz_PCIX_ECC       = 0x06,

        PCI_SPEED_133MHz_PCIX_ECC       = 0x07,

        PCI_SPEED_66MHz_PCIX_266        = 0x09,

        PCI_SPEED_100MHz_PCIX_266       = 0x0a,

        PCI_SPEED_133MHz_PCIX_266       = 0x0b,

        PCI_SPEED_66MHz_PCIX_533        = 0x11,

        PCI_SPEED_100MHz_PCIX_533       = 0x12,

        PCI_SPEED_133MHz_PCIX_533       = 0x13,

        PCI_SPEED_UNKNOWN               = 0xff,

};

/* 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,

};

enum pcie_link_speed {

        PCIE_2PT5GB             = 0x14,

        PCIE_LNK_SPEED_UNKNOWN  = 0xFF,

};

struct hotplug_slot;

struct hotplug_slot_attribute {

        struct attribute attr;

        ssize_t (*show)(struct hotplug_slot *, char *);

        ssize_t (*store)(struct hotplug_slot *, const char *, size_t);

};

#define to_hotplug_attr(n) container_of(n, struct hotplug_slot_attribute, attr);

/**

 * struct hotplug_slot_ops -the callbacks that the hotplug pci core can use

 * @owner: The module owner 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.

 * @get_address: Called to get pci address 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_max_bus_speed: Called to get the max bus speed for 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_cur_bus_speed: Called to get the current bus speed for 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.

 *

 * 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;

        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 (*get_address)              (struct hotplug_slot *slot, u32 *value);

        int (*get_max_bus_speed)        (struct hotplug_slot *slot, enum pci_bus_speed *value);

        int (*get_cur_bus_speed)        (struct hotplug_slot *slot, enum pci_bus_speed *value);

};

/**

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

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

 * @address: (domain << 16 | bus << 8 | dev)

 *

 * 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;

        u32     address;

        enum pci_bus_speed      max_bus_speed;

        enum pci_bus_speed      cur_bus_speed;

};

/**

 * struct hotplug_slot - used to register a physical slot with the hotplug pci core

 * @name: the name of the slot being registered.  This string must

 * be unique amoung slots registered on this system.

 * @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 {

        char                            *name;

        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 kobject                  kobj;

};

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

extern int pci_hp_register              (struct hotplug_slot *slot);

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);

extern struct kset pci_hotplug_slots_subsys;

/* 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>

#include <acpi/actypes.h>

extern acpi_status acpi_run_oshp(acpi_handle handle);

extern acpi_status acpi_get_hp_params_from_firmware(struct pci_bus *bus,

                                struct hotplug_params *hpp);

int acpi_root_bridge(acpi_handle handle);

#endif

#endif