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  *
  11  * All rights reserved.
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or (at
  16  * your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful, but
  19  * WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  21  * NON INFRINGEMENT.  See the GNU General Public License for more
  22  * details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27  *
  28  * Send feedback to <gregkh@us.ibm.com>,
  29  *                  <t-kochi@bq.jp.nec.com>
  30  *
  31  */
  32
  33 #ifndef _ACPIPHP_H
  34 #define _ACPIPHP_H
  35
  36 #include <linux/acpi.h>
  37 #include <linux/kobject.h>      /* for KOBJ_NAME_LEN */
  38 #include "pci_hotplug.h"
  39
  40 #define dbg(format, arg...)                                     \
  41         do {                                                    \
  42                 if (acpiphp_debug)                              \
  43                         printk(KERN_DEBUG "%s: " format,        \
  44                                 MY_NAME , ## arg);              \
  45         } while (0)
  46 #define err(format, arg...) printk(KERN_ERR "%s: " format, MY_NAME , ## arg)
  47 #define info(format, arg...) printk(KERN_INFO "%s: " format, MY_NAME , ## arg)
  48 #define warn(format, arg...) printk(KERN_WARNING "%s: " format, MY_NAME , ## arg)
  49
  50 #define SLOT_MAGIC      0x67267322
  51 /* name size which is used for entries in pcihpfs */
  52 #define SLOT_NAME_SIZE  KOBJ_NAME_LEN           /* {_SUN} */
  53
  54 struct acpiphp_bridge;
  55 struct acpiphp_slot;
  56 struct pci_resource;
  57
  58 /*
  59  * struct slot - slot information for each *physical* slot
  60  */
  61 struct slot {
  62         u32 magic;
  63         u8 number;
  64         struct hotplug_slot     *hotplug_slot;
  65         struct list_head        slot_list;
  66
  67         struct acpiphp_slot     *acpi_slot;
  68 };
  69
  70 /*
  71  * struct pci_resource - describes pci resource (mem, pfmem, io, bus)
  72  */
  73 struct pci_resource {
  74         struct pci_resource * next;
  75         u64 base;
  76         u32 length;
  77 };
  78
  79 /**
  80  * struct hpp_param - ACPI 2.0 _HPP Hot Plug Parameters
  81  * @cache_line_size in DWORD
  82  * @latency_timer in PCI clock
  83  * @enable_SERR 0 or 1
  84  * @enable_PERR 0 or 1
  85  */
  86 struct hpp_param {
  87         u8 cache_line_size;
  88         u8 latency_timer;
  89         u8 enable_SERR;
  90         u8 enable_PERR;
  91 };
  92
  93
  94 /**
  95  * struct acpiphp_bridge - PCI bridge information
  96  *
  97  * for each bridge device in ACPI namespace
  98  */
  99 struct acpiphp_bridge {
 100         struct list_head list;
 101         acpi_handle handle;
 102         struct acpiphp_slot *slots;
 103         int type;
 104         int nr_slots;
 105
 106         u8 seg;
 107         u8 bus;
 108         u8 sub;
 109
 110         u32 flags;
 111
 112         /* This bus (host bridge) or Secondary bus (PCI-to-PCI bridge) */
 113         struct pci_bus *pci_bus;
 114
 115         /* PCI-to-PCI bridge device */
 116         struct pci_dev *pci_dev;
 117
 118         /* ACPI 2.0 _HPP parameters */
 119         struct hpp_param hpp;
 120
 121         spinlock_t res_lock;
 122
 123         /* available resources on this bus */
 124         struct pci_resource *mem_head;
 125         struct pci_resource *p_mem_head;
 126         struct pci_resource *io_head;
 127         struct pci_resource *bus_head;
 128 };
 129
 130
 131 /**
 132  * struct acpiphp_slot - PCI slot information
 133  *
 134  * PCI slot information for each *physical* PCI slot
 135  */
 136 struct acpiphp_slot {
 137         struct acpiphp_slot *next;
 138         struct acpiphp_bridge *bridge;  /* parent */
 139         struct list_head funcs;         /* one slot may have different
 140                                            objects (i.e. for each function) */
 141         struct semaphore crit_sect;
 142
 143         u32             id;             /* slot id (serial #) for hotplug core */
 144         u8              device;         /* pci device# */
 145
 146         u32             sun;            /* ACPI _SUN (slot unique number) */
 147         u32             slotno;         /* slot number relative to bridge */
 148         u32             flags;          /* see below */
 149 };
 150
 151
 152 /**
 153  * struct acpiphp_func - PCI function information
 154  *
 155  * PCI function information for each object in ACPI namespace
 156  * typically 8 objects per slot (i.e. for each PCI function)
 157  */
 158 struct acpiphp_func {
 159         struct acpiphp_slot *slot;      /* parent */
 160
 161         struct list_head sibling;
 162         struct pci_dev *pci_dev;
 163
 164         acpi_handle     handle;
 165
 166         u8              function;       /* pci function# */
 167         u32             flags;          /* see below */
 168
 169         /* resources used for this function */
 170         struct pci_resource *mem_head;
 171         struct pci_resource *p_mem_head;
 172         struct pci_resource *io_head;
 173         struct pci_resource *bus_head;
 174 };
 175
 176
 177 /* PCI bus bridge HID */
 178 #define ACPI_PCI_HOST_HID               "PNP0A03"
 179
 180 /* PCI BRIDGE type */
 181 #define BRIDGE_TYPE_HOST                0
 182 #define BRIDGE_TYPE_P2P                 1
 183
 184 /* ACPI _STA method value (ignore bit 4; battery present) */
 185 #define ACPI_STA_PRESENT                (0x00000001)
 186 #define ACPI_STA_ENABLED                (0x00000002)
 187 #define ACPI_STA_SHOW_IN_UI             (0x00000004)
 188 #define ACPI_STA_FUNCTIONING            (0x00000008)
 189 #define ACPI_STA_ALL                    (0x0000000f)
 190
 191 /* bridge flags */
 192 #define BRIDGE_HAS_STA          (0x00000001)
 193 #define BRIDGE_HAS_EJ0          (0x00000002)
 194 #define BRIDGE_HAS_HPP          (0x00000004)
 195 #define BRIDGE_HAS_PS0          (0x00000010)
 196 #define BRIDGE_HAS_PS1          (0x00000020)
 197 #define BRIDGE_HAS_PS2          (0x00000040)
 198 #define BRIDGE_HAS_PS3          (0x00000080)
 199
 200 /* slot flags */
 201
 202 #define SLOT_POWEREDON          (0x00000001)
 203 #define SLOT_ENABLED            (0x00000002)
 204 #define SLOT_MULTIFUNCTION      (x000000004)
 205
 206 /* function flags */
 207
 208 #define FUNC_HAS_STA            (0x00000001)
 209 #define FUNC_HAS_EJ0            (0x00000002)
 210 #define FUNC_HAS_PS0            (0x00000010)
 211 #define FUNC_HAS_PS1            (0x00000020)
 212 #define FUNC_HAS_PS2            (0x00000040)
 213 #define FUNC_HAS_PS3            (0x00000080)
 214
 215 #define FUNC_EXISTS             (0x10000000) /* to make sure we call _EJ0 only for existing funcs */
 216
 217 /* function prototypes */
 218
 219 /* acpiphp_glue.c */
 220 extern int acpiphp_glue_init (void);
 221 extern void acpiphp_glue_exit (void);
 222 extern int acpiphp_get_num_slots (void);
 223 extern struct acpiphp_slot *get_slot_from_id (int id);
 224 typedef int (*acpiphp_callback)(struct acpiphp_slot *slot, void *data);
 225 extern int acpiphp_for_each_slot (acpiphp_callback fn, void *data);
 226
 227 extern int acpiphp_check_bridge (struct acpiphp_bridge *bridge);
 228 extern int acpiphp_enable_slot (struct acpiphp_slot *slot);
 229 extern int acpiphp_disable_slot (struct acpiphp_slot *slot);
 230 extern u8 acpiphp_get_power_status (struct acpiphp_slot *slot);
 231 extern u8 acpiphp_get_attention_status (struct acpiphp_slot *slot);
 232 extern u8 acpiphp_get_latch_status (struct acpiphp_slot *slot);
 233 extern u8 acpiphp_get_adapter_status (struct acpiphp_slot *slot);
 234
 235 /* acpiphp_pci.c */
 236 extern struct pci_dev *acpiphp_allocate_pcidev (struct pci_bus *pbus, int dev, int fn);
 237 extern int acpiphp_configure_slot (struct acpiphp_slot *slot);
 238 extern int acpiphp_configure_function (struct acpiphp_func *func);
 239 extern int acpiphp_unconfigure_function (struct acpiphp_func *func);
 240 extern int acpiphp_detect_pci_resource (struct acpiphp_bridge *bridge);
 241 extern int acpiphp_init_func_resource (struct acpiphp_func *func);
 242
 243 /* acpiphp_res.c */
 244 extern struct pci_resource *acpiphp_get_io_resource (struct pci_resource **head, u32 size);
 245 extern struct pci_resource *acpiphp_get_max_resource (struct pci_resource **head, u32 size);
 246 extern struct pci_resource *acpiphp_get_resource (struct pci_resource **head, u32 size);
 247 extern struct pci_resource *acpiphp_get_resource_with_base (struct pci_resource **head, u64 base, u32 size);
 248 extern int acpiphp_resource_sort_and_combine (struct pci_resource **head);
 249 extern struct pci_resource *acpiphp_make_resource (u64 base, u32 length);
 250 extern void acpiphp_move_resource (struct pci_resource **from, struct pci_resource **to);
 251 extern void acpiphp_free_resource (struct pci_resource **res);
 252 extern void acpiphp_dump_resource (struct acpiphp_bridge *bridge); /* debug */
 253 extern void acpiphp_dump_func_resource (struct acpiphp_func *func); /* debug */
 254
 255 /* variables */
 256 extern int acpiphp_debug;
 257
 258 #endif /* _ACPIPHP_H */