2 * PCI HotPlug Core Functions
4 * Copyright (C) 1995,2001 Compaq Computer Corporation
5 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
6 * Copyright (C) 2001 IBM Corp.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or (at
13 * your option) any later version.
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
18 * NON INFRINGEMENT. See the GNU General Public License for more
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 * Send feedback to <greg@kroah.com>
28 #ifndef _PCI_HOTPLUG_H
29 #define _PCI_HOTPLUG_H
32 /* These values come from the PCI Hotplug Spec */
34 PCI_SPEED_33MHz = 0x00,
35 PCI_SPEED_66MHz = 0x01,
36 PCI_SPEED_66MHz_PCIX = 0x02,
37 PCI_SPEED_100MHz_PCIX = 0x03,
38 PCI_SPEED_133MHz_PCIX = 0x04,
39 PCI_SPEED_66MHz_PCIX_ECC = 0x05,
40 PCI_SPEED_100MHz_PCIX_ECC = 0x06,
41 PCI_SPEED_133MHz_PCIX_ECC = 0x07,
42 PCI_SPEED_66MHz_PCIX_266 = 0x09,
43 PCI_SPEED_100MHz_PCIX_266 = 0x0a,
44 PCI_SPEED_133MHz_PCIX_266 = 0x0b,
45 PCI_SPEED_66MHz_PCIX_533 = 0x11,
46 PCI_SPEED_100MHz_PCIX_533 = 0x12,
47 PCI_SPEED_133MHz_PCIX_533 = 0x13,
48 PCI_SPEED_UNKNOWN = 0xff,
51 /* These values come from the PCI Express Spec */
52 enum pcie_link_width {
53 PCIE_LNK_WIDTH_RESRV = 0x00,
61 PCIE_LNK_WIDTH_UNKNOWN = 0xFF,
64 enum pcie_link_speed {
66 PCIE_LNK_SPEED_UNKNOWN = 0xFF,
70 struct hotplug_slot_core;
73 * struct hotplug_slot_ops -the callbacks that the hotplug pci core can use
74 * @owner: The module owner of this structure
75 * @enable_slot: Called when the user wants to enable a specific pci slot
76 * @disable_slot: Called when the user wants to disable a specific pci slot
77 * @set_attention_status: Called to set the specific slot's attention LED to
79 * @hardware_test: Called to run a specified hardware test on the specified
81 * @get_power_status: Called to get the current power status of a slot.
82 * If this field is NULL, the value passed in the struct hotplug_slot_info
83 * will be used when this value is requested by a user.
84 * @get_attention_status: Called to get the current attention status of a slot.
85 * If this field is NULL, the value passed in the struct hotplug_slot_info
86 * will be used when this value is requested by a user.
87 * @get_latch_status: Called to get the current latch status of a slot.
88 * If this field is NULL, the value passed in the struct hotplug_slot_info
89 * will be used when this value is requested by a user.
90 * @get_adapter_status: Called to get see if an adapter is present in the slot or not.
91 * If this field is NULL, the value passed in the struct hotplug_slot_info
92 * will be used when this value is requested by a user.
93 * @get_address: Called to get pci address of a slot.
94 * If this field is NULL, the value passed in the struct hotplug_slot_info
95 * will be used when this value is requested by a user.
96 * @get_max_bus_speed: Called to get the max bus speed for a slot.
97 * If this field is NULL, the value passed in the struct hotplug_slot_info
98 * will be used when this value is requested by a user.
99 * @get_cur_bus_speed: Called to get the current bus speed for a slot.
100 * If this field is NULL, the value passed in the struct hotplug_slot_info
101 * will be used when this value is requested by a user.
103 * The table of function pointers that is passed to the hotplug pci core by a
104 * hotplug pci driver. These functions are called by the hotplug pci core when
105 * the user wants to do something to a specific slot (query it for information,
106 * set an LED, enable / disable power, etc.)
108 struct hotplug_slot_ops {
109 struct module *owner;
110 int (*enable_slot) (struct hotplug_slot *slot);
111 int (*disable_slot) (struct hotplug_slot *slot);
112 int (*set_attention_status) (struct hotplug_slot *slot, u8 value);
113 int (*hardware_test) (struct hotplug_slot *slot, u32 value);
114 int (*get_power_status) (struct hotplug_slot *slot, u8 *value);
115 int (*get_attention_status) (struct hotplug_slot *slot, u8 *value);
116 int (*get_latch_status) (struct hotplug_slot *slot, u8 *value);
117 int (*get_adapter_status) (struct hotplug_slot *slot, u8 *value);
118 int (*get_address) (struct hotplug_slot *slot, u32 *value);
119 int (*get_max_bus_speed) (struct hotplug_slot *slot, enum pci_bus_speed *value);
120 int (*get_cur_bus_speed) (struct hotplug_slot *slot, enum pci_bus_speed *value);
124 * struct hotplug_slot_info - used to notify the hotplug pci core of the state of the slot
125 * @power: if power is enabled or not (1/0)
126 * @attention_status: if the attention light is enabled or not (1/0)
127 * @latch_status: if the latch (if any) is open or closed (1/0)
128 * @adapter_present: if there is a pci board present in the slot or not (1/0)
129 * @address: (domain << 16 | bus << 8 | dev)
131 * Used to notify the hotplug pci core of the status of a specific slot.
133 struct hotplug_slot_info {
139 enum pci_bus_speed max_bus_speed;
140 enum pci_bus_speed cur_bus_speed;
144 * struct hotplug_slot - used to register a physical slot with the hotplug pci core
145 * @name: the name of the slot being registered. This string must
146 * be unique amoung slots registered on this system.
147 * @ops: pointer to the &struct hotplug_slot_ops to be used for this slot
148 * @info: pointer to the &struct hotplug_slot_info for the inital values for
150 * @private: used by the hotplug pci controller driver to store whatever it
153 struct hotplug_slot {
155 struct hotplug_slot_ops *ops;
156 struct hotplug_slot_info *info;
159 /* Variables below this are for use only by the hotplug pci core. */
160 struct list_head slot_list;
161 struct hotplug_slot_core *core_priv;
164 extern int pci_hp_register (struct hotplug_slot *slot);
165 extern int pci_hp_deregister (struct hotplug_slot *slot);
166 extern int pci_hp_change_slot_info (const char *name,
167 struct hotplug_slot_info *info);
169 struct pci_dev_wrapped {
174 struct pci_bus_wrapped {
180 int (* pre_visit_pci_bus) (struct pci_bus_wrapped *,
181 struct pci_dev_wrapped *);
182 int (* post_visit_pci_bus) (struct pci_bus_wrapped *,
183 struct pci_dev_wrapped *);
185 int (* pre_visit_pci_dev) (struct pci_dev_wrapped *,
186 struct pci_bus_wrapped *);
187 int (* visit_pci_dev) (struct pci_dev_wrapped *,
188 struct pci_bus_wrapped *);
189 int (* post_visit_pci_dev) (struct pci_dev_wrapped *,
190 struct pci_bus_wrapped *);
193 extern int pci_visit_dev (struct pci_visit *fn,
194 struct pci_dev_wrapped *wrapped_dev,
195 struct pci_bus_wrapped *wrapped_parent);
197 int pci_bus_read_config_byte (struct pci_bus *bus, unsigned int devfn, int where, u8 *val);
198 int pci_bus_read_config_word (struct pci_bus *bus, unsigned int devfn, int where, u16 *val);
199 int pci_bus_read_config_dword (struct pci_bus *bus, unsigned int devfn, int where, u32 *val);
200 int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn, int where, u8 val);
201 int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn, int where, u16 val);
202 int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn, int where, u32 val);
205 * Compatibility functions. Don't use these, use the
206 * pci_bus_*() functions above.
209 extern int pci_read_config_byte_nodev (struct pci_ops *ops, u8 bus, u8 device,
210 u8 function, int where, u8 *val);
211 extern int pci_read_config_word_nodev (struct pci_ops *ops, u8 bus, u8 device,
212 u8 function, int where, u16 *val);
213 extern int pci_read_config_dword_nodev (struct pci_ops *ops, u8 bus, u8 device,
214 u8 function, int where, u32 *val);
216 extern int pci_write_config_byte_nodev (struct pci_ops *ops, u8 bus, u8 device,
217 u8 function, int where, u8 val);
218 extern int pci_write_config_word_nodev (struct pci_ops *ops, u8 bus, u8 device,
219 u8 function, int where, u16 val);
220 extern int pci_write_config_dword_nodev (struct pci_ops *ops, u8 bus, u8 device,
221 u8 function, int where, u32 val);