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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
10 * Copyright (C) 2003-2005 Matthew Wilcox (matthew.wilcox@hp.com)
11 * Copyright (C) 2003-2005 Hewlett Packard
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>
39#include <linux/mutex.h>
40#include <linux/pci_hotplug.h>
41
42struct acpiphp_context;
43struct acpiphp_bridge;
44struct acpiphp_slot;
45
46/*
47 * struct slot - slot information for each *physical* slot
48 */
49struct slot {
50 struct hotplug_slot *hotplug_slot;
51 struct acpiphp_slot *acpi_slot;
52 struct hotplug_slot_info info;
53 unsigned int sun; /* ACPI _SUN (Slot User Number) value */
54};
55
56static inline const char *slot_name(struct slot *slot)
57{
58 return hotplug_slot_name(slot->hotplug_slot);
59}
60
61/*
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;
68 struct list_head slots;
69 struct kref ref;
70
71 struct acpiphp_context *context;
72
73 int nr_slots;
74
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;
80
81 bool is_going_away;
82};
83
84
85/*
86 * struct acpiphp_slot - PCI slot information
87 *
88 * PCI slot information for each *physical* PCI slot
89 */
90struct acpiphp_slot {
91 struct list_head node;
92 struct pci_bus *bus;
93 struct list_head funcs; /* one slot may have different
94 objects (i.e. for each function) */
95 struct slot *slot;
96 struct mutex crit_sect;
97
98 u8 device; /* pci device# */
99 u32 flags; /* see below */
100};
101
102
103/*
104 * struct acpiphp_func - PCI function information
105 *
106 * PCI function information for each object in ACPI namespace
107 * typically 8 objects per slot (i.e. for each PCI function)
108 */
109struct acpiphp_func {
110 struct acpiphp_bridge *parent;
111 struct acpiphp_slot *slot;
112
113 struct list_head sibling;
114
115 u8 function; /* pci function# */
116 u32 flags; /* see below */
117};
118
119struct acpiphp_context {
120 acpi_handle handle;
121 struct acpiphp_func func;
122 struct acpiphp_bridge *bridge;
123 unsigned int refcount;
124};
125
126static inline struct acpiphp_context *func_to_context(struct acpiphp_func *func)
127{
128 return container_of(func, struct acpiphp_context, func);
129}
130
131static inline acpi_handle func_to_handle(struct acpiphp_func *func)
132{
133 return func_to_context(func)->handle;
134}
135
136/*
137 * struct acpiphp_attention_info - device specific attention registration
138 *
139 * ACPI has no generic method of setting/getting attention status
140 * this allows for device specific driver registration
141 */
142struct acpiphp_attention_info
143{
144 int (*set_attn)(struct hotplug_slot *slot, u8 status);
145 int (*get_attn)(struct hotplug_slot *slot, u8 *status);
146 struct module *owner;
147};
148
149/* ACPI _STA method value (ignore bit 4; battery present) */
150#define ACPI_STA_ALL (0x0000000f)
151
152/* slot flags */
153
154#define SLOT_ENABLED (0x00000001)
155#define SLOT_IS_GOING_AWAY (0x00000002)
156
157/* function flags */
158
159#define FUNC_HAS_STA (0x00000001)
160#define FUNC_HAS_EJ0 (0x00000002)
161#define FUNC_HAS_DCK (0x00000004)
162
163/* function prototypes */
164
165/* acpiphp_core.c */
166int acpiphp_register_attention(struct acpiphp_attention_info*info);
167int acpiphp_unregister_attention(struct acpiphp_attention_info *info);
168int acpiphp_register_hotplug_slot(struct acpiphp_slot *slot, unsigned int sun);
169void acpiphp_unregister_hotplug_slot(struct acpiphp_slot *slot);
170
171/* acpiphp_glue.c */
172typedef int (*acpiphp_callback)(struct acpiphp_slot *slot, void *data);
173
174int acpiphp_enable_slot(struct acpiphp_slot *slot);
175int acpiphp_disable_slot(struct acpiphp_slot *slot);
176u8 acpiphp_get_power_status(struct acpiphp_slot *slot);
177u8 acpiphp_get_attention_status(struct acpiphp_slot *slot);
178u8 acpiphp_get_latch_status(struct acpiphp_slot *slot);
179u8 acpiphp_get_adapter_status(struct acpiphp_slot *slot);
180
181/* variables */
182extern bool acpiphp_disabled;
183
184#endif /* _ACPIPHP_H */