Home Home > GIT Browse
summaryrefslogtreecommitdiff
blob: 2e855afa0212fc312dfa2b9a412d47ffa0c656f0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
/*
 * PCI HotPlug Core Functions
 *
 * Copyright (C) 1995,2001 Compaq Computer Corporation
 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
 * Copyright (C) 2001 IBM Corp.
 *
 * 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 <kristen.c.accardi@intel.com>
 *
 */
#ifndef _PCI_HOTPLUG_H
#define _PCI_HOTPLUG_H

/**
 * struct hotplug_slot_ops -the callbacks that the hotplug pci core can use
 * @owner: The module owner of this structure
 * @mod_name: The module name (KBUILD_MODNAME) of this structure
 * @enable_slot: Called when the user wants to enable a specific pci slot
 * @disable_slot: Called when the user wants to disable a specific pci slot
 * @set_attention_status: Called to set the specific slot's attention LED to
 * the specified value
 * @hardware_test: Called to run a specified hardware test on the specified
 * slot.
 * @get_power_status: Called to get the current power status of a slot.
 *	If this field is NULL, the value passed in the struct hotplug_slot_info
 *	will be used when this value is requested by a user.
 * @get_attention_status: Called to get the current attention status of a slot.
 *	If this field is NULL, the value passed in the struct hotplug_slot_info
 *	will be used when this value is requested by a user.
 * @get_latch_status: Called to get the current latch status of a slot.
 *	If this field is NULL, the value passed in the struct hotplug_slot_info
 *	will be used when this value is requested by a user.
 * @get_adapter_status: Called to get see if an adapter is present in the slot or not.
 *	If this field is NULL, the value passed in the struct hotplug_slot_info
 *	will be used when this value is requested by a user.
 * @reset_slot: Optional interface to allow override of a bus reset for the
 *	slot for cases where a secondary bus reset can result in spurious
 *	hotplug events or where a slot can be reset independent of the bus.
 *
 * The table of function pointers that is passed to the hotplug pci core by a
 * hotplug pci driver.  These functions are called by the hotplug pci core when
 * the user wants to do something to a specific slot (query it for information,
 * set an LED, enable / disable power, etc.)
 */
struct hotplug_slot_ops {
	struct module *owner;
	const char *mod_name;
	int (*enable_slot)		(struct hotplug_slot *slot);
	int (*disable_slot)		(struct hotplug_slot *slot);
	int (*set_attention_status)	(struct hotplug_slot *slot, u8 value);
	int (*hardware_test)		(struct hotplug_slot *slot, u32 value);
	int (*get_power_status)		(struct hotplug_slot *slot, u8 *value);
	int (*get_attention_status)	(struct hotplug_slot *slot, u8 *value);
	int (*get_latch_status)		(struct hotplug_slot *slot, u8 *value);
	int (*get_adapter_status)	(struct hotplug_slot *slot, u8 *value);
	int (*reset_slot)		(struct hotplug_slot *slot, int probe);
};

/**
 * struct hotplug_slot_info - used to notify the hotplug pci core of the state of the slot
 * @power_status: if power is enabled or not (1/0)
 * @attention_status: if the attention light is enabled or not (1/0)
 * @latch_status: if the latch (if any) is open or closed (1/0)
 * @adapter_status: if there is a pci board present in the slot or not (1/0)
 *
 * Used to notify the hotplug pci core of the status of a specific slot.
 */
struct hotplug_slot_info {
	u8	power_status;
	u8	attention_status;
	u8	latch_status;
	u8	adapter_status;
};

/**
 * struct hotplug_slot - used to register a physical slot with the hotplug pci core
 * @ops: pointer to the &struct hotplug_slot_ops to be used for this slot
 * @info: pointer to the &struct hotplug_slot_info for the initial values for
 * this slot.
 * @release: called during pci_hp_deregister to free memory allocated in a
 * hotplug_slot structure.
 * @private: used by the hotplug pci controller driver to store whatever it
 * needs.
 */
struct hotplug_slot {
	struct hotplug_slot_ops		*ops;
	struct hotplug_slot_info	*info;
	void (*release) (struct hotplug_slot *slot);
	void				*private;

	/* Variables below this are for use only by the hotplug pci core. */
	struct list_head		slot_list;
	struct pci_slot			*pci_slot;
};

static inline const char *hotplug_slot_name(const struct hotplug_slot *slot)
{
	return pci_slot_name(slot->pci_slot);
}

int __pci_hp_register(struct hotplug_slot *slot, struct pci_bus *pbus, int nr,
		      const char *name, struct module *owner,
		      const char *mod_name);
int pci_hp_deregister(struct hotplug_slot *slot);
int __must_check pci_hp_change_slot_info(struct hotplug_slot *slot,
					 struct hotplug_slot_info *info);

/* use a define to avoid include chaining to get THIS_MODULE & friends */
#define pci_hp_register(slot, pbus, devnr, name) \
	__pci_hp_register(slot, pbus, devnr, name, THIS_MODULE, KBUILD_MODNAME)

/* PCI Setting Record (Type 0) */
struct hpp_type0 {
	u32 revision;
	u8  cache_line_size;
	u8  latency_timer;
	u8  enable_serr;
	u8  enable_perr;
};

/* PCI-X Setting Record (Type 1) */
struct hpp_type1 {
	u32 revision;
	u8  max_mem_read;
	u8  avg_max_split;
	u16 tot_max_split;
};

/* PCI Express Setting Record (Type 2) */
struct hpp_type2 {
	u32 revision;
	u32 unc_err_mask_and;
	u32 unc_err_mask_or;
	u32 unc_err_sever_and;
	u32 unc_err_sever_or;
	u32 cor_err_mask_and;
	u32 cor_err_mask_or;
	u32 adv_err_cap_and;
	u32 adv_err_cap_or;
	u16 pci_exp_devctl_and;
	u16 pci_exp_devctl_or;
	u16 pci_exp_lnkctl_and;
	u16 pci_exp_lnkctl_or;
	u32 sec_unc_err_sever_and;
	u32 sec_unc_err_sever_or;
	u32 sec_unc_err_mask_and;
	u32 sec_unc_err_mask_or;
};

struct hotplug_params {
	struct hpp_type0 *t0;		/* Type0: NULL if not available */
	struct hpp_type1 *t1;		/* Type1: NULL if not available */
	struct hpp_type2 *t2;		/* Type2: NULL if not available */
	struct hpp_type0 type0_data;
	struct hpp_type1 type1_data;
	struct hpp_type2 type2_data;
};

#ifdef CONFIG_ACPI
#include <linux/acpi.h>
int pci_get_hp_params(struct pci_dev *dev, struct hotplug_params *hpp);
bool pciehp_is_native(struct pci_dev *pdev);
int acpi_get_hp_hw_control_from_firmware(struct pci_dev *dev, u32 flags);
int acpi_pci_check_ejectable(struct pci_bus *pbus, acpi_handle handle);
int acpi_pci_detect_ejectable(acpi_handle handle);
#else
static inline int pci_get_hp_params(struct pci_dev *dev,
				    struct hotplug_params *hpp)
{
	return -ENODEV;
}
static inline bool pciehp_is_native(struct pci_dev *pdev) { return true; }
#endif
#endif