forked from luck/tmp_suning_uos_patched
437eb7bf7b
We're about to add runtime PM of hotplug ports, but we need to restrict it to ports that are handled natively by the OS: If they're handled by the firmware (which is the case for Thunderbolt on non-Macs), things would break if the OS put the ports into D3hot behind the firmware's back. To determine if a hotplug port is handled natively, one has to walk up from the port to the root bridge and check the cached _OSC Control Field for the value of the "PCI Express Native Hot Plug control" bit. There's already a function to do that, device_is_managed_by_native_pciehp(), but it's private to drivers/pci/hotplug/acpiphp_glue.c and only compiled in if CONFIG_HOTPLUG_PCI_ACPI is enabled. Make it public and move it to drivers/pci/pci-acpi.c, so that it is available in the more general CONFIG_ACPI case. The function contains a check if the device in question is a hotplug port and returns false if it's not. The caller we're going to add doesn't need this as it only calls the function if it actually *is* a hotplug port. Move the check out of the function into the single existing caller. Rename it to pciehp_is_native() and add some kerneldoc and polish. No functional change intended. Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Lukas Wunner <lukas@wunner.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
192 lines
6.9 KiB
C
192 lines
6.9 KiB
C
/*
|
|
* 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
|
|
|
|
/**
|
|
* 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.
|
|
* @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 {
|
|
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);
|
|
int (*reset_slot) (struct hotplug_slot *slot, int probe);
|
|
};
|
|
|
|
/**
|
|
* 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;
|
|
};
|
|
|
|
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_deregister(struct hotplug_slot *slot);
|
|
int __must_check pci_hp_change_slot_info(struct hotplug_slot *slot,
|
|
struct hotplug_slot_info *info);
|
|
|
|
/* 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)
|
|
|
|
/* 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 <linux/acpi.h>
|
|
int pci_get_hp_params(struct pci_dev *dev, struct hotplug_params *hpp);
|
|
bool pciehp_is_native(struct pci_dev *pdev);
|
|
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;
|
|
}
|
|
static inline bool pciehp_is_native(struct pci_dev *pdev) { return true; }
|
|
#endif
|
|
#endif
|