mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-30 08:46:43 +07:00
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
/*
|
|
* ACPI PCI Hot Plug Controller Driver
|
|
*
|
|
* Copyright (C) 1995,2001 Compaq Computer Corporation
|
|
* Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
|
|
* Copyright (C) 2001 IBM Corp.
|
|
* Copyright (C) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com)
|
|
* Copyright (C) 2002,2003 Takayoshi Kochi (t-kochi@bq.jp.nec.com)
|
|
* Copyright (C) 2002,2003 NEC Corporation
|
|
* Copyright (C) 2003-2005 Matthew Wilcox (matthew.wilcox@hp.com)
|
|
* Copyright (C) 2003-2005 Hewlett Packard
|
|
*
|
|
* 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 <gregkh@us.ibm.com>,
|
|
* <t-kochi@bq.jp.nec.com>
|
|
*
|
|
*/
|
|
|
|
#ifndef _ACPIPHP_H
|
|
#define _ACPIPHP_H
|
|
|
|
#include <linux/acpi.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/pci_hotplug.h>
|
|
|
|
struct acpiphp_context;
|
|
struct acpiphp_bridge;
|
|
struct acpiphp_slot;
|
|
|
|
/*
|
|
* struct slot - slot information for each *physical* slot
|
|
*/
|
|
struct slot {
|
|
struct hotplug_slot *hotplug_slot;
|
|
struct acpiphp_slot *acpi_slot;
|
|
struct hotplug_slot_info info;
|
|
unsigned int sun; /* ACPI _SUN (Slot User Number) value */
|
|
};
|
|
|
|
static inline const char *slot_name(struct slot *slot)
|
|
{
|
|
return hotplug_slot_name(slot->hotplug_slot);
|
|
}
|
|
|
|
/*
|
|
* struct acpiphp_bridge - PCI bridge information
|
|
*
|
|
* for each bridge device in ACPI namespace
|
|
*/
|
|
struct acpiphp_bridge {
|
|
struct list_head list;
|
|
struct list_head slots;
|
|
struct kref ref;
|
|
|
|
struct acpiphp_context *context;
|
|
|
|
int nr_slots;
|
|
|
|
/* This bus (host bridge) or Secondary bus (PCI-to-PCI bridge) */
|
|
struct pci_bus *pci_bus;
|
|
|
|
/* PCI-to-PCI bridge device */
|
|
struct pci_dev *pci_dev;
|
|
|
|
bool is_going_away;
|
|
};
|
|
|
|
|
|
/*
|
|
* struct acpiphp_slot - PCI slot information
|
|
*
|
|
* PCI slot information for each *physical* PCI slot
|
|
*/
|
|
struct acpiphp_slot {
|
|
struct list_head node;
|
|
struct pci_bus *bus;
|
|
struct list_head funcs; /* one slot may have different
|
|
objects (i.e. for each function) */
|
|
struct slot *slot;
|
|
|
|
u8 device; /* pci device# */
|
|
u32 flags; /* see below */
|
|
};
|
|
|
|
|
|
/*
|
|
* struct acpiphp_func - PCI function information
|
|
*
|
|
* PCI function information for each object in ACPI namespace
|
|
* typically 8 objects per slot (i.e. for each PCI function)
|
|
*/
|
|
struct acpiphp_func {
|
|
struct acpiphp_bridge *parent;
|
|
struct acpiphp_slot *slot;
|
|
|
|
struct list_head sibling;
|
|
|
|
u8 function; /* pci function# */
|
|
u32 flags; /* see below */
|
|
};
|
|
|
|
struct acpiphp_context {
|
|
struct acpi_hotplug_context hp;
|
|
struct acpiphp_func func;
|
|
struct acpiphp_bridge *bridge;
|
|
unsigned int refcount;
|
|
};
|
|
|
|
static inline struct acpiphp_context *to_acpiphp_context(struct acpi_hotplug_context *hp)
|
|
{
|
|
return container_of(hp, struct acpiphp_context, hp);
|
|
}
|
|
|
|
static inline struct acpiphp_context *func_to_context(struct acpiphp_func *func)
|
|
{
|
|
return container_of(func, struct acpiphp_context, func);
|
|
}
|
|
|
|
static inline struct acpi_device *func_to_acpi_device(struct acpiphp_func *func)
|
|
{
|
|
return func_to_context(func)->hp.self;
|
|
}
|
|
|
|
static inline acpi_handle func_to_handle(struct acpiphp_func *func)
|
|
{
|
|
return func_to_acpi_device(func)->handle;
|
|
}
|
|
|
|
struct acpiphp_root_context {
|
|
struct acpi_hotplug_context hp;
|
|
struct acpiphp_bridge *root_bridge;
|
|
};
|
|
|
|
static inline struct acpiphp_root_context *to_acpiphp_root_context(struct acpi_hotplug_context *hp)
|
|
{
|
|
return container_of(hp, struct acpiphp_root_context, hp);
|
|
}
|
|
|
|
/*
|
|
* struct acpiphp_attention_info - device specific attention registration
|
|
*
|
|
* ACPI has no generic method of setting/getting attention status
|
|
* this allows for device specific driver registration
|
|
*/
|
|
struct acpiphp_attention_info
|
|
{
|
|
int (*set_attn)(struct hotplug_slot *slot, u8 status);
|
|
int (*get_attn)(struct hotplug_slot *slot, u8 *status);
|
|
struct module *owner;
|
|
};
|
|
|
|
/* ACPI _STA method value (ignore bit 4; battery present) */
|
|
#define ACPI_STA_ALL (0x0000000f)
|
|
|
|
/* slot flags */
|
|
|
|
#define SLOT_ENABLED (0x00000001)
|
|
#define SLOT_IS_GOING_AWAY (0x00000002)
|
|
|
|
/* function flags */
|
|
|
|
#define FUNC_HAS_STA (0x00000001)
|
|
#define FUNC_HAS_EJ0 (0x00000002)
|
|
|
|
/* function prototypes */
|
|
|
|
/* acpiphp_core.c */
|
|
int acpiphp_register_attention(struct acpiphp_attention_info*info);
|
|
int acpiphp_unregister_attention(struct acpiphp_attention_info *info);
|
|
int acpiphp_register_hotplug_slot(struct acpiphp_slot *slot, unsigned int sun);
|
|
void acpiphp_unregister_hotplug_slot(struct acpiphp_slot *slot);
|
|
|
|
/* acpiphp_glue.c */
|
|
typedef int (*acpiphp_callback)(struct acpiphp_slot *slot, void *data);
|
|
|
|
int acpiphp_enable_slot(struct acpiphp_slot *slot);
|
|
int acpiphp_disable_slot(struct acpiphp_slot *slot);
|
|
u8 acpiphp_get_power_status(struct acpiphp_slot *slot);
|
|
u8 acpiphp_get_attention_status(struct acpiphp_slot *slot);
|
|
u8 acpiphp_get_latch_status(struct acpiphp_slot *slot);
|
|
u8 acpiphp_get_adapter_status(struct acpiphp_slot *slot);
|
|
|
|
/* variables */
|
|
extern bool acpiphp_disabled;
|
|
|
|
#endif /* _ACPIPHP_H */
|