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linux-next/drivers/pci/hotplug/acpiphp.h
Rafael J. Wysocki bbd34fcdd1 ACPI / hotplug / PCI: Register all devices under the given bridge 
Rework register_slot() to create a struct acpiphp_func object for
every function it is called for and to create acpiphp slots for all
of them.  Although acpiphp_register_hotplug_slot() is only called for
the slots whose functions are identified as "ejectable", so that user
space can manipulate them, the ACPIPHP notify handler,
handle_hotplug_event(), is now installed for all of the registered
functions (that aren't dock stations) and hotplug events may be
handled for all of them.

As a result, essentially, all PCI bridges represented by objects in
the ACPI namespace are now going to be "hotplug" bridges and that may
affect resources allocation in general, although it shouldn't lead to
problems.

This allows the code to be simplified substantially and addresses
the problem where bus check or device check notifications for some
PCI bridges or devices are not handled, because those devices are
not recognized as "ejectable" or there appear to be no "ejectable"
devices under those bridges.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2013-07-23 04:00:22 +02:00

201 lines
5.4 KiB
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/*
* 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>
#define dbg(format, arg...) \
do { \
if (acpiphp_debug) \
printk(KERN_DEBUG "%s: " format, \
MY_NAME , ## arg); \
} while (0)
#define err(format, arg...) printk(KERN_ERR "%s: " format, MY_NAME , ## arg)
#define info(format, arg...) printk(KERN_INFO "%s: " format, MY_NAME , ## arg)
#define warn(format, arg...) printk(KERN_WARNING "%s: " format, MY_NAME , ## arg)
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;
};
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;
acpi_handle handle;
struct acpiphp_context *context;
int nr_slots;
u32 flags;
/* 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;
};
/*
* struct acpiphp_slot - PCI slot information
*
* PCI slot information for each *physical* PCI slot
*/
struct acpiphp_slot {
struct list_head node;
struct acpiphp_bridge *bridge; /* parent */
struct list_head funcs; /* one slot may have different
objects (i.e. for each function) */
struct slot *slot;
struct mutex crit_sect;
u8 device; /* pci device# */
unsigned long long sun; /* ACPI _SUN (slot unique number) */
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_context *context;
struct acpiphp_slot *slot; /* parent */
struct list_head sibling;
acpi_handle handle;
u8 function; /* pci function# */
u32 flags; /* see below */
};
struct acpiphp_context {
acpi_handle handle;
struct acpiphp_func *func;
struct acpiphp_bridge *bridge;
unsigned int refcount;
};
/*
* 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;
};
/* PCI bus bridge HID */
#define ACPI_PCI_HOST_HID "PNP0A03"
/* ACPI _STA method value (ignore bit 4; battery present) */
#define ACPI_STA_ALL (0x0000000f)
/* bridge flags */
#define BRIDGE_HAS_EJ0 (0x00000001)
/* slot flags */
#define SLOT_POWEREDON (0x00000001)
#define SLOT_ENABLED (0x00000002)
#define SLOT_MULTIFUNCTION (0x00000004)
/* function flags */
#define FUNC_HAS_STA (0x00000001)
#define FUNC_HAS_EJ0 (0x00000002)
#define FUNC_HAS_PS0 (0x00000010)
#define FUNC_HAS_PS1 (0x00000020)
#define FUNC_HAS_PS2 (0x00000040)
#define FUNC_HAS_PS3 (0x00000080)
#define FUNC_HAS_DCK (0x00000100)
/* 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);
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);
int acpiphp_eject_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_debug;
extern bool acpiphp_disabled;
#endif /* _ACPIPHP_H */
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