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root/include/linux/pci_hotplug.h

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

extern int pci_hp_register(struct hotplug_slot *, struct pci_bus *, int nr);
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);

/* 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_get_hp_params_from_firmware(struct pci_bus *bus,
                                struct hotplug_params *hpp);
int acpi_get_hp_hw_control_from_firmware(struct pci_dev *dev, u32 flags);
int acpi_root_bridge(acpi_handle handle);
#endif
#endif


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