drivers/pci/hotplug/acpiphp.h

   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/kobject.h>      /* for KOBJ_NAME_LEN */
  40 #include "pci_hotplug.h"
  41
  42 #define dbg(format, arg...)                                     \
  43         do {                                                    \
  44                 if (acpiphp_debug)                              \
  45                         printk(KERN_DEBUG "%s: " format,        \
  46                                 MY_NAME , ## arg);              \
  47         } while (0)
  48 #define err(format, arg...) printk(KERN_ERR "%s: " format, MY_NAME , ## arg)
  49 #define info(format, arg...) printk(KERN_INFO "%s: " format, MY_NAME , ## arg)
  50 #define warn(format, arg...) printk(KERN_WARNING "%s: " format, MY_NAME , ## arg)
  51
  52 /* name size which is used for entries in pcihpfs */
  53 #define SLOT_NAME_SIZE  KOBJ_NAME_LEN           /* {_SUN} */
  54
  55 struct acpiphp_bridge;
  56 struct acpiphp_slot;
  57
  58 /*
  59  * struct slot - slot information for each *physical* slot
  60  */
  61 struct slot {
  62         u8 number;
  63         struct hotplug_slot     *hotplug_slot;
  64         struct list_head        slot_list;
  65
  66         struct acpiphp_slot     *acpi_slot;
  67 };
  68
  69 /**
  70  * struct hpp_param - ACPI 2.0 _HPP Hot Plug Parameters
  71  * @cache_line_size in DWORD
  72  * @latency_timer in PCI clock
  73  * @enable_SERR 0 or 1
  74  * @enable_PERR 0 or 1
  75  */
  76 struct hpp_param {
  77         u8 cache_line_size;
  78         u8 latency_timer;
  79         u8 enable_SERR;
  80         u8 enable_PERR;
  81 };
  82
  83
  84 /**
  85  * struct acpiphp_bridge - PCI bridge information
  86  *
  87  * for each bridge device in ACPI namespace
  88  */
  89 struct acpiphp_bridge {
  90         struct list_head list;
  91         acpi_handle handle;
  92         struct acpiphp_slot *slots;
  93         int type;
  94         int nr_slots;
  95
  96         u32 flags;
  97
  98         /* This bus (host bridge) or Secondary bus (PCI-to-PCI bridge) */
  99         struct pci_bus *pci_bus;
 100
 101         /* PCI-to-PCI bridge device */
 102         struct pci_dev *pci_dev;
 103
 104         /* ACPI 2.0 _HPP parameters */
 105         struct hpp_param hpp;
 106
 107         spinlock_t res_lock;
 108 };
 109
 110
 111 /**
 112  * struct acpiphp_slot - PCI slot information
 113  *
 114  * PCI slot information for each *physical* PCI slot
 115  */
 116 struct acpiphp_slot {
 117         struct acpiphp_slot *next;
 118         struct acpiphp_bridge *bridge;  /* parent */
 119         struct list_head funcs;         /* one slot may have different
 120                                            objects (i.e. for each function) */
 121         struct semaphore crit_sect;
 122
 123         u32             id;             /* slot id (serial #) for hotplug core */
 124         u8              device;         /* pci device# */
 125
 126         u32             sun;            /* ACPI _SUN (slot unique number) */
 127         u32             slotno;         /* slot number relative to bridge */
 128         u32             flags;          /* see below */
 129 };
 130
 131
 132 /**
 133  * struct acpiphp_func - PCI function information
 134  *
 135  * PCI function information for each object in ACPI namespace
 136  * typically 8 objects per slot (i.e. for each PCI function)
 137  */
 138 struct acpiphp_func {
 139         struct acpiphp_slot *slot;      /* parent */
 140
 141         struct list_head sibling;
 142         struct pci_dev *pci_dev;
 143
 144         acpi_handle     handle;
 145
 146         u8              function;       /* pci function# */
 147         u32             flags;          /* see below */
 148 };
 149
 150 /**
 151  * struct acpiphp_attention_info - device specific attention registration
 152  *
 153  * ACPI has no generic method of setting/getting attention status
 154  * this allows for device specific driver registration
 155  */
 156 struct acpiphp_attention_info
 157 {
 158         int (*set_attn)(struct hotplug_slot *slot, u8 status);
 159         int (*get_attn)(struct hotplug_slot *slot, u8 *status);
 160         struct module *owner;
 161 };
 162
 163 /* PCI bus bridge HID */
 164 #define ACPI_PCI_HOST_HID               "PNP0A03"
 165
 166 /* PCI BRIDGE type */
 167 #define BRIDGE_TYPE_HOST                0
 168 #define BRIDGE_TYPE_P2P                 1
 169
 170 /* ACPI _STA method value (ignore bit 4; battery present) */
 171 #define ACPI_STA_PRESENT                (0x00000001)
 172 #define ACPI_STA_ENABLED                (0x00000002)
 173 #define ACPI_STA_SHOW_IN_UI             (0x00000004)
 174 #define ACPI_STA_FUNCTIONING            (0x00000008)
 175 #define ACPI_STA_ALL                    (0x0000000f)
 176
 177 /* bridge flags */
 178 #define BRIDGE_HAS_STA          (0x00000001)
 179 #define BRIDGE_HAS_EJ0          (0x00000002)
 180 #define BRIDGE_HAS_HPP          (0x00000004)
 181 #define BRIDGE_HAS_PS0          (0x00000010)
 182 #define BRIDGE_HAS_PS1          (0x00000020)
 183 #define BRIDGE_HAS_PS2          (0x00000040)
 184 #define BRIDGE_HAS_PS3          (0x00000080)
 185
 186 /* slot flags */
 187
 188 #define SLOT_POWEREDON          (0x00000001)
 189 #define SLOT_ENABLED            (0x00000002)
 190 #define SLOT_MULTIFUNCTION      (0x00000004)
 191
 192 /* function flags */
 193
 194 #define FUNC_HAS_STA            (0x00000001)
 195 #define FUNC_HAS_EJ0            (0x00000002)
 196 #define FUNC_HAS_PS0            (0x00000010)
 197 #define FUNC_HAS_PS1            (0x00000020)
 198 #define FUNC_HAS_PS2            (0x00000040)
 199 #define FUNC_HAS_PS3            (0x00000080)
 200
 201 /* function prototypes */
 202
 203 /* acpiphp_core.c */
 204 extern int acpiphp_register_attention(struct acpiphp_attention_info*info);
 205 extern int acpiphp_unregister_attention(struct acpiphp_attention_info *info);
 206
 207 /* acpiphp_glue.c */
 208 extern int acpiphp_glue_init (void);
 209 extern void acpiphp_glue_exit (void);
 210 extern int acpiphp_get_num_slots (void);
 211 extern struct acpiphp_slot *get_slot_from_id (int id);
 212 typedef int (*acpiphp_callback)(struct acpiphp_slot *slot, void *data);
 213
 214 extern int acpiphp_enable_slot (struct acpiphp_slot *slot);
 215 extern int acpiphp_disable_slot (struct acpiphp_slot *slot);
 216 extern u8 acpiphp_get_power_status (struct acpiphp_slot *slot);
 217 extern u8 acpiphp_get_attention_status (struct acpiphp_slot *slot);
 218 extern u8 acpiphp_get_latch_status (struct acpiphp_slot *slot);
 219 extern u8 acpiphp_get_adapter_status (struct acpiphp_slot *slot);
 220 extern u32 acpiphp_get_address (struct acpiphp_slot *slot);
 221
 222 /* variables */
 223 extern int acpiphp_debug;
 224
 225 #endif /* _ACPIPHP_H */