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TOMOYO Linux Cross Reference
Linux/include/linux/pci_hotplug.h

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  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  *
 25  * Send feedback to <kristen.c.accardi@intel.com>
 26  *
 27  */
 28 #ifndef _PCI_HOTPLUG_H
 29 #define _PCI_HOTPLUG_H
 30 
 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 
 44 /**
 45  * struct hotplug_slot_ops -the callbacks that the hotplug pci core can use
 46  * @owner: The module owner of this structure
 47  * @mod_name: The module name (KBUILD_MODNAME) of this structure
 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.
 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;
 74         const char *mod_name;
 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);
 83 };
 84 
 85 /**
 86  * struct hotplug_slot_info - used to notify the hotplug pci core of the state of the slot
 87  * @power_status: if power is enabled or not (1/0)
 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)
 90  * @adapter_status: if there is a pci board present in the slot or not (1/0)
 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;
 99 };
100 
101 /**
102  * struct hotplug_slot - used to register a physical slot with the hotplug pci core
103  * @ops: pointer to the &struct hotplug_slot_ops to be used for this slot
104  * @info: pointer to the &struct hotplug_slot_info for the initial values for
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 {
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;
119         struct pci_slot                 *pci_slot;
120 };
121 #define to_hotplug_slot(n) container_of(n, struct hotplug_slot, kobj)
122 
123 static inline const char *hotplug_slot_name(const struct hotplug_slot *slot)
124 {
125         return pci_slot_name(slot->pci_slot);
126 }
127 
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);
134 
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)
138 
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 
177 struct hotplug_params {
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;
184 };
185 
186 #ifdef CONFIG_ACPI
187 #include <acpi/acpi.h>
188 #include <acpi/acpi_bus.h>
189 int pci_get_hp_params(struct pci_dev *dev, struct hotplug_params *hpp);
190 int acpi_get_hp_hw_control_from_firmware(struct pci_dev *dev, u32 flags);
191 int acpi_pci_check_ejectable(struct pci_bus *pbus, acpi_handle handle);
192 int acpi_pci_detect_ejectable(acpi_handle handle);
193 #else
194 static inline int pci_get_hp_params(struct pci_dev *dev,
195                                     struct hotplug_params *hpp)
196 {
197         return -ENODEV;
198 }
199 #endif
200 
201 void pci_configure_slot(struct pci_dev *dev);
202 #endif
203 
204 

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