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1da177e4 LT |
1 | /* |
2 | * PCI HotPlug Core Functions | |
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 | * | |
8 | * All rights reserved. | |
9 | * | |
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. | |
14 | * | |
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 | |
19 | * details. | |
20 | * | |
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. | |
24 | * | |
fb5f4d7a | 25 | * Send feedback to <kristen.c.accardi@intel.com> |
1da177e4 LT |
26 | * |
27 | */ | |
28 | #ifndef _PCI_HOTPLUG_H | |
29 | #define _PCI_HOTPLUG_H | |
30 | ||
1da177e4 LT |
31 | /* These values come from the PCI Express Spec */ |
32 | enum pcie_link_width { | |
33 | PCIE_LNK_WIDTH_RESRV = 0x00, | |
34 | PCIE_LNK_X1 = 0x01, | |
35 | PCIE_LNK_X2 = 0x02, | |
36 | PCIE_LNK_X4 = 0x04, | |
37 | PCIE_LNK_X8 = 0x08, | |
38 | PCIE_LNK_X12 = 0x0C, | |
39 | PCIE_LNK_X16 = 0x10, | |
40 | PCIE_LNK_X32 = 0x20, | |
41 | PCIE_LNK_WIDTH_UNKNOWN = 0xFF, | |
42 | }; | |
43 | ||
1da177e4 LT |
44 | /** |
45 | * struct hotplug_slot_ops -the callbacks that the hotplug pci core can use | |
46 | * @owner: The module owner of this structure | |
c825bc94 | 47 | * @mod_name: The module name (KBUILD_MODNAME) of this structure |
1da177e4 LT |
48 | * @enable_slot: Called when the user wants to enable a specific pci slot |
49 | * @disable_slot: Called when the user wants to disable a specific pci slot | |
50 | * @set_attention_status: Called to set the specific slot's attention LED to | |
51 | * the specified value | |
52 | * @hardware_test: Called to run a specified hardware test on the specified | |
53 | * slot. | |
54 | * @get_power_status: Called to get the current power status of a slot. | |
55 | * If this field is NULL, the value passed in the struct hotplug_slot_info | |
56 | * will be used when this value is requested by a user. | |
57 | * @get_attention_status: Called to get the current attention status of a slot. | |
58 | * If this field is NULL, the value passed in the struct hotplug_slot_info | |
59 | * will be used when this value is requested by a user. | |
60 | * @get_latch_status: Called to get the current latch status of a slot. | |
61 | * If this field is NULL, the value passed in the struct hotplug_slot_info | |
62 | * will be used when this value is requested by a user. | |
63 | * @get_adapter_status: Called to get see if an adapter is present in the slot or not. | |
64 | * If this field is NULL, the value passed in the struct hotplug_slot_info | |
65 | * will be used when this value is requested by a user. | |
1da177e4 LT |
66 | * |
67 | * The table of function pointers that is passed to the hotplug pci core by a | |
68 | * hotplug pci driver. These functions are called by the hotplug pci core when | |
69 | * the user wants to do something to a specific slot (query it for information, | |
70 | * set an LED, enable / disable power, etc.) | |
71 | */ | |
72 | struct hotplug_slot_ops { | |
73 | struct module *owner; | |
c825bc94 | 74 | const char *mod_name; |
1da177e4 LT |
75 | int (*enable_slot) (struct hotplug_slot *slot); |
76 | int (*disable_slot) (struct hotplug_slot *slot); | |
77 | int (*set_attention_status) (struct hotplug_slot *slot, u8 value); | |
78 | int (*hardware_test) (struct hotplug_slot *slot, u32 value); | |
79 | int (*get_power_status) (struct hotplug_slot *slot, u8 *value); | |
80 | int (*get_attention_status) (struct hotplug_slot *slot, u8 *value); | |
81 | int (*get_latch_status) (struct hotplug_slot *slot, u8 *value); | |
82 | int (*get_adapter_status) (struct hotplug_slot *slot, u8 *value); | |
1da177e4 LT |
83 | }; |
84 | ||
85 | /** | |
86 | * struct hotplug_slot_info - used to notify the hotplug pci core of the state of the slot | |
3749c51a | 87 | * @power_status: if power is enabled or not (1/0) |
1da177e4 LT |
88 | * @attention_status: if the attention light is enabled or not (1/0) |
89 | * @latch_status: if the latch (if any) is open or closed (1/0) | |
3749c51a | 90 | * @adapter_status: if there is a pci board present in the slot or not (1/0) |
1da177e4 LT |
91 | * |
92 | * Used to notify the hotplug pci core of the status of a specific slot. | |
93 | */ | |
94 | struct hotplug_slot_info { | |
95 | u8 power_status; | |
96 | u8 attention_status; | |
97 | u8 latch_status; | |
98 | u8 adapter_status; | |
1da177e4 LT |
99 | }; |
100 | ||
101 | /** | |
102 | * struct hotplug_slot - used to register a physical slot with the hotplug pci core | |
1da177e4 | 103 | * @ops: pointer to the &struct hotplug_slot_ops to be used for this slot |
eaae4b3a | 104 | * @info: pointer to the &struct hotplug_slot_info for the initial values for |
1da177e4 LT |
105 | * this slot. |
106 | * @release: called during pci_hp_deregister to free memory allocated in a | |
107 | * hotplug_slot structure. | |
108 | * @private: used by the hotplug pci controller driver to store whatever it | |
109 | * needs. | |
110 | */ | |
111 | struct hotplug_slot { | |
1da177e4 LT |
112 | struct hotplug_slot_ops *ops; |
113 | struct hotplug_slot_info *info; | |
114 | void (*release) (struct hotplug_slot *slot); | |
115 | void *private; | |
116 | ||
117 | /* Variables below this are for use only by the hotplug pci core. */ | |
118 | struct list_head slot_list; | |
f46753c5 | 119 | struct pci_slot *pci_slot; |
1da177e4 LT |
120 | }; |
121 | #define to_hotplug_slot(n) container_of(n, struct hotplug_slot, kobj) | |
122 | ||
0ad772ec AC |
123 | static inline const char *hotplug_slot_name(const struct hotplug_slot *slot) |
124 | { | |
125 | return pci_slot_name(slot->pci_slot); | |
126 | } | |
127 | ||
f39d5b72 BH |
128 | int __pci_hp_register(struct hotplug_slot *slot, struct pci_bus *pbus, int nr, |
129 | const char *name, struct module *owner, | |
130 | const char *mod_name); | |
131 | int pci_hp_deregister(struct hotplug_slot *slot); | |
132 | int __must_check pci_hp_change_slot_info(struct hotplug_slot *slot, | |
133 | struct hotplug_slot_info *info); | |
1da177e4 | 134 | |
eb5589a8 PG |
135 | /* use a define to avoid include chaining to get THIS_MODULE & friends */ |
136 | #define pci_hp_register(slot, pbus, devnr, name) \ | |
137 | __pci_hp_register(slot, pbus, devnr, name, THIS_MODULE, KBUILD_MODNAME) | |
c825bc94 | 138 | |
e22b7350 KK |
139 | /* PCI Setting Record (Type 0) */ |
140 | struct hpp_type0 { | |
141 | u32 revision; | |
142 | u8 cache_line_size; | |
143 | u8 latency_timer; | |
144 | u8 enable_serr; | |
145 | u8 enable_perr; | |
146 | }; | |
147 | ||
148 | /* PCI-X Setting Record (Type 1) */ | |
149 | struct hpp_type1 { | |
150 | u32 revision; | |
151 | u8 max_mem_read; | |
152 | u8 avg_max_split; | |
153 | u16 tot_max_split; | |
154 | }; | |
155 | ||
156 | /* PCI Express Setting Record (Type 2) */ | |
157 | struct hpp_type2 { | |
158 | u32 revision; | |
159 | u32 unc_err_mask_and; | |
160 | u32 unc_err_mask_or; | |
161 | u32 unc_err_sever_and; | |
162 | u32 unc_err_sever_or; | |
163 | u32 cor_err_mask_and; | |
164 | u32 cor_err_mask_or; | |
165 | u32 adv_err_cap_and; | |
166 | u32 adv_err_cap_or; | |
167 | u16 pci_exp_devctl_and; | |
168 | u16 pci_exp_devctl_or; | |
169 | u16 pci_exp_lnkctl_and; | |
170 | u16 pci_exp_lnkctl_or; | |
171 | u32 sec_unc_err_sever_and; | |
172 | u32 sec_unc_err_sever_or; | |
173 | u32 sec_unc_err_mask_and; | |
174 | u32 sec_unc_err_mask_or; | |
175 | }; | |
176 | ||
783c49fc | 177 | struct hotplug_params { |
e22b7350 KK |
178 | struct hpp_type0 *t0; /* Type0: NULL if not available */ |
179 | struct hpp_type1 *t1; /* Type1: NULL if not available */ | |
180 | struct hpp_type2 *t2; /* Type2: NULL if not available */ | |
181 | struct hpp_type0 type0_data; | |
182 | struct hpp_type1 type1_data; | |
183 | struct hpp_type2 type2_data; | |
783c49fc KA |
184 | }; |
185 | ||
186 | #ifdef CONFIG_ACPI | |
187 | #include <acpi/acpi.h> | |
188 | #include <acpi/acpi_bus.h> | |
e81995bb | 189 | int pci_get_hp_params(struct pci_dev *dev, struct hotplug_params *hpp); |
ac9c052d | 190 | int acpi_get_hp_hw_control_from_firmware(struct pci_dev *dev, u32 flags); |
e8c331e9 | 191 | int acpi_pci_check_ejectable(struct pci_bus *pbus, acpi_handle handle); |
7f538669 | 192 | int acpi_pci_detect_ejectable(acpi_handle handle); |
8838400d BH |
193 | #else |
194 | static inline int pci_get_hp_params(struct pci_dev *dev, | |
195 | struct hotplug_params *hpp) | |
196 | { | |
197 | return -ENODEV; | |
198 | } | |
783c49fc | 199 | #endif |
8838400d BH |
200 | |
201 | void pci_configure_slot(struct pci_dev *dev); | |
1da177e4 LT |
202 | #endif |
203 |