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1/*
2 * ACPI PCI Hot Plug Controller Driver
3 *
4 * Copyright (C) 1995,2001 Compaq Computer Corporation
5 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
6 * Copyright (C) 2001 IBM Corp.
7 * Copyright (C) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com)
8 * Copyright (C) 2002,2003 Takayoshi Kochi (t-kochi@bq.jp.nec.com)
9 * Copyright (C) 2002,2003 NEC Corporation
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10 * Copyright (C) 2003-2005 Matthew Wilcox (matthew.wilcox@hp.com)
11 * Copyright (C) 2003-2005 Hewlett Packard
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12 *
13 * All rights reserved.
14 *
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or (at
18 * your option) any later version.
19 *
20 * This program is distributed in the hope that it will be useful, but
21 * WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
23 * NON INFRINGEMENT. See the GNU General Public License for more
24 * details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 *
30 * Send feedback to <gregkh@us.ibm.com>,
31 * <t-kochi@bq.jp.nec.com>
32 *
33 */
34
35#ifndef _ACPIPHP_H
36#define _ACPIPHP_H
37
38#include <linux/acpi.h>
6aa4cdd0 39#include <linux/mutex.h>
7a54f25c 40#include <linux/pci_hotplug.h>
1da177e4 41
cb7b8ced 42struct acpiphp_context;
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43struct acpiphp_bridge;
44struct acpiphp_slot;
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45
46/*
47 * struct slot - slot information for each *physical* slot
48 */
49struct slot {
1da177e4 50 struct hotplug_slot *hotplug_slot;
1da177e4 51 struct acpiphp_slot *acpi_slot;
ac9e9891 52 struct hotplug_slot_info info;
7342798d 53 unsigned int sun; /* ACPI _SUN (Slot User Number) value */
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54};
55
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56static inline const char *slot_name(struct slot *slot)
57{
58 return hotplug_slot_name(slot->hotplug_slot);
59}
60
26e6c66e 61/*
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62 * struct acpiphp_bridge - PCI bridge information
63 *
64 * for each bridge device in ACPI namespace
65 */
66struct acpiphp_bridge {
67 struct list_head list;
ad41dd9d 68 struct list_head slots;
3d54a316 69 struct kref ref;
551bcb75 70
cb7b8ced 71 struct acpiphp_context *context;
551bcb75 72
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73 int nr_slots;
74
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75 /* This bus (host bridge) or Secondary bus (PCI-to-PCI bridge) */
76 struct pci_bus *pci_bus;
77
78 /* PCI-to-PCI bridge device */
79 struct pci_dev *pci_dev;
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80
81 bool is_going_away;
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82};
83
84
26e6c66e 85/*
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86 * struct acpiphp_slot - PCI slot information
87 *
88 * PCI slot information for each *physical* PCI slot
89 */
90struct acpiphp_slot {
ad41dd9d 91 struct list_head node;
bda46dbb 92 struct pci_bus *bus;
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93 struct list_head funcs; /* one slot may have different
94 objects (i.e. for each function) */
e27da381 95 struct slot *slot;
1da177e4 96
1da177e4 97 u8 device; /* pci device# */
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98 u32 flags; /* see below */
99};
100
101
26e6c66e 102/*
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103 * struct acpiphp_func - PCI function information
104 *
105 * PCI function information for each object in ACPI namespace
106 * typically 8 objects per slot (i.e. for each PCI function)
107 */
108struct acpiphp_func {
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109 struct acpiphp_bridge *parent;
110 struct acpiphp_slot *slot;
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111
112 struct list_head sibling;
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113
114 u8 function; /* pci function# */
115 u32 flags; /* see below */
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116};
117
cb7b8ced 118struct acpiphp_context {
3c2cc7ff 119 struct acpi_hotplug_context hp;
bd4674df 120 struct acpiphp_func func;
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121 struct acpiphp_bridge *bridge;
122 unsigned int refcount;
123};
124
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125static inline struct acpiphp_context *to_acpiphp_context(struct acpi_hotplug_context *hp)
126{
127 return container_of(hp, struct acpiphp_context, hp);
128}
129
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130static inline struct acpiphp_context *func_to_context(struct acpiphp_func *func)
131{
132 return container_of(func, struct acpiphp_context, func);
133}
134
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135static inline struct acpi_device *func_to_acpi_device(struct acpiphp_func *func)
136{
3c2cc7ff 137 return func_to_context(func)->hp.self;
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138}
139
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140static inline acpi_handle func_to_handle(struct acpiphp_func *func)
141{
bbcbfc0e 142 return func_to_acpi_device(func)->handle;
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143}
144
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145struct acpiphp_root_context {
146 struct acpi_hotplug_context hp;
147 struct acpiphp_bridge *root_bridge;
148};
149
150static inline struct acpiphp_root_context *to_acpiphp_root_context(struct acpi_hotplug_context *hp)
151{
152 return container_of(hp, struct acpiphp_root_context, hp);
153}
154
26e6c66e 155/*
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156 * struct acpiphp_attention_info - device specific attention registration
157 *
158 * ACPI has no generic method of setting/getting attention status
159 * this allows for device specific driver registration
160 */
161struct acpiphp_attention_info
162{
163 int (*set_attn)(struct hotplug_slot *slot, u8 status);
164 int (*get_attn)(struct hotplug_slot *slot, u8 *status);
165 struct module *owner;
166};
167
1da177e4 168/* ACPI _STA method value (ignore bit 4; battery present) */
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169#define ACPI_STA_ALL (0x0000000f)
170
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171/* slot flags */
172
c38f82cf 173#define SLOT_ENABLED (0x00000001)
9217a984 174#define SLOT_IS_GOING_AWAY (0x00000002)
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175
176/* function flags */
177
178#define FUNC_HAS_STA (0x00000001)
179#define FUNC_HAS_EJ0 (0x00000002)
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180
181/* function prototypes */
182
183/* acpiphp_core.c */
ff3ce480 184int acpiphp_register_attention(struct acpiphp_attention_info *info);
f39d5b72 185int acpiphp_unregister_attention(struct acpiphp_attention_info *info);
7342798d 186int acpiphp_register_hotplug_slot(struct acpiphp_slot *slot, unsigned int sun);
f39d5b72 187void acpiphp_unregister_hotplug_slot(struct acpiphp_slot *slot);
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188
189/* acpiphp_glue.c */
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190typedef int (*acpiphp_callback)(struct acpiphp_slot *slot, void *data);
191
f39d5b72 192int acpiphp_enable_slot(struct acpiphp_slot *slot);
9217a984 193int acpiphp_disable_slot(struct acpiphp_slot *slot);
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194u8 acpiphp_get_power_status(struct acpiphp_slot *slot);
195u8 acpiphp_get_attention_status(struct acpiphp_slot *slot);
196u8 acpiphp_get_latch_status(struct acpiphp_slot *slot);
197u8 acpiphp_get_adapter_status(struct acpiphp_slot *slot);
1da177e4 198
1da177e4 199/* variables */
6037a803 200extern bool acpiphp_disabled;
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201
202#endif /* _ACPIPHP_H */