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882d18a702
After relatively recent changes in the ACPI-based PCI hotplug
(ACPIPHP) code, the acpiphp_check_host_bridge() executed for PCI
host bridges via acpi_pci_root_scan_dependent() doesn't do anything
useful, because those bridges do not have hotplug contexts. That
happens by mistake, so fix it by making acpiphp_enumerate_slots()
add hotplug contexts to PCI host bridges too and modify
acpiphp_remove_slots() to drop those contexts for host bridges
as appropriate.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=76901
Fixes: 2d8b1d566a (ACPI / hotplug / PCI: Get rid of check_sub_bridges())
Reported-and-tested-by: Gavin Guo <gavin.guo@canonical.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: 3.15+ <stable@vger.kernel.org> # 3.15+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
203 lines
5.3 KiB
C
203 lines
5.3 KiB
C
/*
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* ACPI PCI Hot Plug Controller Driver
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*
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* Copyright (C) 1995,2001 Compaq Computer Corporation
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* Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
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* Copyright (C) 2001 IBM Corp.
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* Copyright (C) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com)
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* Copyright (C) 2002,2003 Takayoshi Kochi (t-kochi@bq.jp.nec.com)
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* Copyright (C) 2002,2003 NEC Corporation
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* Copyright (C) 2003-2005 Matthew Wilcox (matthew.wilcox@hp.com)
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* Copyright (C) 2003-2005 Hewlett Packard
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Send feedback to <gregkh@us.ibm.com>,
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* <t-kochi@bq.jp.nec.com>
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*
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*/
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#ifndef _ACPIPHP_H
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#define _ACPIPHP_H
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#include <linux/acpi.h>
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#include <linux/mutex.h>
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#include <linux/pci_hotplug.h>
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struct acpiphp_context;
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struct acpiphp_bridge;
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struct acpiphp_slot;
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/*
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* struct slot - slot information for each *physical* slot
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*/
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struct slot {
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struct hotplug_slot *hotplug_slot;
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struct acpiphp_slot *acpi_slot;
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struct hotplug_slot_info info;
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unsigned int sun; /* ACPI _SUN (Slot User Number) value */
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};
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static inline const char *slot_name(struct slot *slot)
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{
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return hotplug_slot_name(slot->hotplug_slot);
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}
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/*
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* struct acpiphp_bridge - PCI bridge information
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*
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* for each bridge device in ACPI namespace
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*/
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struct acpiphp_bridge {
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struct list_head list;
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struct list_head slots;
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struct kref ref;
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struct acpiphp_context *context;
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int nr_slots;
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/* This bus (host bridge) or Secondary bus (PCI-to-PCI bridge) */
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struct pci_bus *pci_bus;
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/* PCI-to-PCI bridge device */
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struct pci_dev *pci_dev;
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bool is_going_away;
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};
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/*
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* struct acpiphp_slot - PCI slot information
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*
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* PCI slot information for each *physical* PCI slot
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*/
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struct acpiphp_slot {
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struct list_head node;
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struct pci_bus *bus;
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struct list_head funcs; /* one slot may have different
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objects (i.e. for each function) */
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struct slot *slot;
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u8 device; /* pci device# */
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u32 flags; /* see below */
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};
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/*
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* struct acpiphp_func - PCI function information
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*
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* PCI function information for each object in ACPI namespace
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* typically 8 objects per slot (i.e. for each PCI function)
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*/
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struct acpiphp_func {
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struct acpiphp_bridge *parent;
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struct acpiphp_slot *slot;
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struct list_head sibling;
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u8 function; /* pci function# */
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u32 flags; /* see below */
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};
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struct acpiphp_context {
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struct acpi_hotplug_context hp;
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struct acpiphp_func func;
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struct acpiphp_bridge *bridge;
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unsigned int refcount;
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};
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static inline struct acpiphp_context *to_acpiphp_context(struct acpi_hotplug_context *hp)
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{
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return container_of(hp, struct acpiphp_context, hp);
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}
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static inline struct acpiphp_context *func_to_context(struct acpiphp_func *func)
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{
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return container_of(func, struct acpiphp_context, func);
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}
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static inline struct acpi_device *func_to_acpi_device(struct acpiphp_func *func)
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{
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return func_to_context(func)->hp.self;
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}
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static inline acpi_handle func_to_handle(struct acpiphp_func *func)
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{
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return func_to_acpi_device(func)->handle;
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}
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struct acpiphp_root_context {
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struct acpi_hotplug_context hp;
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struct acpiphp_bridge *root_bridge;
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};
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static inline struct acpiphp_root_context *to_acpiphp_root_context(struct acpi_hotplug_context *hp)
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{
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return container_of(hp, struct acpiphp_root_context, hp);
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}
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/*
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* struct acpiphp_attention_info - device specific attention registration
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*
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* ACPI has no generic method of setting/getting attention status
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* this allows for device specific driver registration
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*/
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struct acpiphp_attention_info
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{
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int (*set_attn)(struct hotplug_slot *slot, u8 status);
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int (*get_attn)(struct hotplug_slot *slot, u8 *status);
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struct module *owner;
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};
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/* ACPI _STA method value (ignore bit 4; battery present) */
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#define ACPI_STA_ALL (0x0000000f)
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/* slot flags */
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#define SLOT_ENABLED (0x00000001)
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#define SLOT_IS_GOING_AWAY (0x00000002)
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/* function flags */
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#define FUNC_HAS_STA (0x00000001)
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#define FUNC_HAS_EJ0 (0x00000002)
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/* function prototypes */
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/* acpiphp_core.c */
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int acpiphp_register_attention(struct acpiphp_attention_info*info);
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int acpiphp_unregister_attention(struct acpiphp_attention_info *info);
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int acpiphp_register_hotplug_slot(struct acpiphp_slot *slot, unsigned int sun);
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void acpiphp_unregister_hotplug_slot(struct acpiphp_slot *slot);
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/* acpiphp_glue.c */
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typedef int (*acpiphp_callback)(struct acpiphp_slot *slot, void *data);
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int acpiphp_enable_slot(struct acpiphp_slot *slot);
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int acpiphp_disable_slot(struct acpiphp_slot *slot);
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u8 acpiphp_get_power_status(struct acpiphp_slot *slot);
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u8 acpiphp_get_attention_status(struct acpiphp_slot *slot);
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u8 acpiphp_get_latch_status(struct acpiphp_slot *slot);
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u8 acpiphp_get_adapter_status(struct acpiphp_slot *slot);
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/* variables */
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extern bool acpiphp_disabled;
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#endif /* _ACPIPHP_H */
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