tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
82
83/*
84 * struct acpiphp_slot - PCI slot information
85 *
86 * PCI slot information for each *physical* PCI slot
87 */
88struct acpiphp_slot {
89 struct list_head node;
90 struct pci_bus *bus;
91 struct list_head funcs; /* one slot may have different
92 objects (i.e. for each function) */
93 struct slot *slot;
94 struct mutex crit_sect;
95
96 u8 device; /* pci device# */
97 u32 flags; /* see below */
98};
99
100
101/*
102 * struct acpiphp_func - PCI function information
103 *
104 * PCI function information for each object in ACPI namespace
105 * typically 8 objects per slot (i.e. for each PCI function)
106 */
107struct acpiphp_func {
108 struct acpiphp_bridge *parent;
109 struct acpiphp_slot *slot;
110
111 struct list_head sibling;
112
113 u8 function; /* pci function# */
114 u32 flags; /* see below */
115};
116
117struct acpiphp_context {
118 acpi_handle handle;
119 struct acpiphp_func func;
120 struct acpiphp_bridge *bridge;
121 unsigned int refcount;
122};
123
124static inline struct acpiphp_context *func_to_context(struct acpiphp_func *func)
125{
126 return container_of(func, struct acpiphp_context, func);
127}
128
129static inline acpi_handle func_to_handle(struct acpiphp_func *func)
130{
131 return func_to_context(func)->handle;
132}
133
134/*
135 * struct acpiphp_attention_info - device specific attention registration
136 *
137 * ACPI has no generic method of setting/getting attention status
138 * this allows for device specific driver registration
139 */
140struct acpiphp_attention_info
141{
142 int (*set_attn)(struct hotplug_slot *slot, u8 status);
143 int (*get_attn)(struct hotplug_slot *slot, u8 *status);
144 struct module *owner;
145};
146
147/* ACPI _STA method value (ignore bit 4; battery present) */
148#define ACPI_STA_ALL (0x0000000f)
149
150/* slot flags */
151
152#define SLOT_ENABLED (0x00000001)
153
154/* function flags */
155
156#define FUNC_HAS_STA (0x00000001)
157#define FUNC_HAS_EJ0 (0x00000002)
158#define FUNC_HAS_DCK (0x00000004)
159
160/* function prototypes */
161
162/* acpiphp_core.c */
163int acpiphp_register_attention(struct acpiphp_attention_info*info);
164int acpiphp_unregister_attention(struct acpiphp_attention_info *info);
165int acpiphp_register_hotplug_slot(struct acpiphp_slot *slot, unsigned int sun);
166void acpiphp_unregister_hotplug_slot(struct acpiphp_slot *slot);
167
168/* acpiphp_glue.c */
169typedef int (*acpiphp_callback)(struct acpiphp_slot *slot, void *data);
170
171int acpiphp_enable_slot(struct acpiphp_slot *slot);
172int acpiphp_disable_and_eject_slot(struct acpiphp_slot *slot);
173u8 acpiphp_get_power_status(struct acpiphp_slot *slot);
174u8 acpiphp_get_attention_status(struct acpiphp_slot *slot);
175u8 acpiphp_get_latch_status(struct acpiphp_slot *slot);
176u8 acpiphp_get_adapter_status(struct acpiphp_slot *slot);
177
178/* variables */
179extern bool acpiphp_disabled;
180
181#endif /* _ACPIPHP_H */