include/acpi/acpi_bus.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  *  acpi_bus.h - ACPI Bus Driver ($Revision: 22 $)
   4  *
   5  *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
   6  *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
   7  */
   8
   9 #ifndef __ACPI_BUS_H__
  10 #define __ACPI_BUS_H__
  11
  12 #include <linux/completion.h>
  13 #include <linux/container_of.h>
  14 #include <linux/device.h>
  15 #include <linux/kobject.h>
  16 #include <linux/mutex.h>
  17 #include <linux/property.h>
  18 #include <linux/types.h>
  19
  20 struct acpi_handle_list {
  21         u32 count;
  22         acpi_handle *handles;
  23 };
  24
  25 /* acpi_utils.h */
  26 acpi_status
  27 acpi_extract_package(union acpi_object *package,
  28                      struct acpi_buffer *format, struct acpi_buffer *buffer);
  29 acpi_status
  30 acpi_evaluate_integer(acpi_handle handle,
  31                       acpi_string pathname,
  32                       struct acpi_object_list *arguments, unsigned long long *data);
  33 bool acpi_evaluate_reference(acpi_handle handle, acpi_string pathname,
  34                              struct acpi_object_list *arguments,
  35                              struct acpi_handle_list *list);
  36 bool acpi_handle_list_equal(struct acpi_handle_list *list1,
  37                             struct acpi_handle_list *list2);
  38 void acpi_handle_list_replace(struct acpi_handle_list *dst,
  39                               struct acpi_handle_list *src);
  40 void acpi_handle_list_free(struct acpi_handle_list *list);
  41 bool acpi_device_dep(acpi_handle target, acpi_handle match);
  42 acpi_status
  43 acpi_evaluate_ost(acpi_handle handle, u32 source_event, u32 status_code,
  44                   struct acpi_buffer *status_buf);
  45
  46 acpi_status
  47 acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld);
  48
  49 bool acpi_has_method(acpi_handle handle, char *name);
  50 acpi_status acpi_execute_simple_method(acpi_handle handle, char *method,
  51                                        u64 arg);
  52 acpi_status acpi_evaluate_ej0(acpi_handle handle);
  53 acpi_status acpi_evaluate_lck(acpi_handle handle, int lock);
  54 acpi_status acpi_evaluate_reg(acpi_handle handle, u8 space_id, u32 function);
  55 bool acpi_ata_match(acpi_handle handle);
  56 bool acpi_bay_match(acpi_handle handle);
  57 bool acpi_dock_match(acpi_handle handle);
  58
  59 bool acpi_check_dsm(acpi_handle handle, const guid_t *guid, u64 rev, u64 funcs);
  60 union acpi_object *acpi_evaluate_dsm(acpi_handle handle, const guid_t *guid,
  61                         u64 rev, u64 func, union acpi_object *argv4);
  62 #ifdef CONFIG_ACPI
  63 static inline union acpi_object *
  64 acpi_evaluate_dsm_typed(acpi_handle handle, const guid_t *guid, u64 rev,
  65                         u64 func, union acpi_object *argv4,
  66                         acpi_object_type type)
  67 {
  68         union acpi_object *obj;
  69
  70         obj = acpi_evaluate_dsm(handle, guid, rev, func, argv4);
  71         if (obj && obj->type != type) {
  72                 ACPI_FREE(obj);
  73                 obj = NULL;
  74         }
  75
  76         return obj;
  77 }
  78 #endif
  79
  80 #define ACPI_INIT_DSM_ARGV4(cnt, eles)                  \
  81         {                                               \
  82           .package.type = ACPI_TYPE_PACKAGE,            \
  83           .package.count = (cnt),                       \
  84           .package.elements = (eles)                    \
  85         }
  86
  87 bool acpi_dev_found(const char *hid);
  88 bool acpi_dev_present(const char *hid, const char *uid, s64 hrv);
  89 bool acpi_reduced_hardware(void);
  90
  91 #ifdef CONFIG_ACPI
  92
  93 struct proc_dir_entry;
  94
  95 #define ACPI_BUS_FILE_ROOT      "acpi"
  96 extern struct proc_dir_entry *acpi_root_dir;
  97
  98 enum acpi_bus_device_type {
  99         ACPI_BUS_TYPE_DEVICE = 0,
 100         ACPI_BUS_TYPE_POWER,
 101         ACPI_BUS_TYPE_PROCESSOR,
 102         ACPI_BUS_TYPE_THERMAL,
 103         ACPI_BUS_TYPE_POWER_BUTTON,
 104         ACPI_BUS_TYPE_SLEEP_BUTTON,
 105         ACPI_BUS_TYPE_ECDT_EC,
 106         ACPI_BUS_DEVICE_TYPE_COUNT
 107 };
 108
 109 struct acpi_driver;
 110 struct acpi_device;
 111
 112 /*
 113  * ACPI Scan Handler
 114  * -----------------
 115  */
 116
 117 struct acpi_hotplug_profile {
 118         struct kobject kobj;
 119         int (*scan_dependent)(struct acpi_device *adev);
 120         void (*notify_online)(struct acpi_device *adev);
 121         bool enabled:1;
 122         bool demand_offline:1;
 123 };
 124
 125 static inline struct acpi_hotplug_profile *to_acpi_hotplug_profile(
 126                                                 struct kobject *kobj)
 127 {
 128         return container_of(kobj, struct acpi_hotplug_profile, kobj);
 129 }
 130
 131 struct acpi_scan_handler {
 132         struct list_head list_node;
 133         const struct acpi_device_id *ids;
 134         bool (*match)(const char *idstr, const struct acpi_device_id **matchid);
 135         int (*attach)(struct acpi_device *dev, const struct acpi_device_id *id);
 136         void (*detach)(struct acpi_device *dev);
 137         void (*post_eject)(struct acpi_device *dev);
 138         void (*bind)(struct device *phys_dev);
 139         void (*unbind)(struct device *phys_dev);
 140         struct acpi_hotplug_profile hotplug;
 141 };
 142
 143 /*
 144  * ACPI Hotplug Context
 145  * --------------------
 146  */
 147
 148 typedef int (*acpi_hp_notify) (struct acpi_device *, u32);
 149 typedef void (*acpi_hp_uevent) (struct acpi_device *, u32);
 150 typedef void (*acpi_hp_fixup) (struct acpi_device *);
 151
 152 struct acpi_hotplug_context {
 153         struct acpi_device *self;
 154         acpi_hp_notify notify;
 155         acpi_hp_uevent uevent;
 156         acpi_hp_fixup fixup;
 157 };
 158
 159 /*
 160  * ACPI Driver
 161  * -----------
 162  */
 163
 164 typedef int (*acpi_op_add) (struct acpi_device * device);
 165 typedef void (*acpi_op_remove) (struct acpi_device *device);
 166 typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event);
 167
 168 struct acpi_device_ops {
 169         acpi_op_add add;
 170         acpi_op_remove remove;
 171         acpi_op_notify notify;
 172 };
 173
 174 #define ACPI_DRIVER_ALL_NOTIFY_EVENTS   0x1     /* system AND device events */
 175
 176 struct acpi_driver {
 177         char name[80];
 178         char class[80];
 179         const struct acpi_device_id *ids; /* Supported Hardware IDs */
 180         unsigned int flags;
 181         struct acpi_device_ops ops;
 182         struct device_driver drv;
 183 };
 184
 185 /*
 186  * ACPI Device
 187  * -----------
 188  */
 189
 190 /* Status (_STA) */
 191
 192 struct acpi_device_status {
 193         u32 present:1;
 194         u32 enabled:1;
 195         u32 show_in_ui:1;
 196         u32 functional:1;
 197         u32 battery_present:1;
 198         u32 reserved:27;
 199 };
 200
 201 /* Flags */
 202
 203 struct acpi_device_flags {
 204         u32 dynamic_status:1;
 205         u32 removable:1;
 206         u32 ejectable:1;
 207         u32 power_manageable:1;
 208         u32 match_driver:1;
 209         u32 initialized:1;
 210         u32 visited:1;
 211         u32 hotplug_notify:1;
 212         u32 is_dock_station:1;
 213         u32 of_compatible_ok:1;
 214         u32 coherent_dma:1;
 215         u32 cca_seen:1;
 216         u32 enumeration_by_parent:1;
 217         u32 honor_deps:1;
 218         u32 reserved:18;
 219 };
 220
 221 /* File System */
 222
 223 struct acpi_device_dir {
 224         struct proc_dir_entry *entry;
 225 };
 226
 227 #define acpi_device_dir(d)      ((d)->dir.entry)
 228
 229 /* Plug and Play */
 230
 231 #define MAX_ACPI_DEVICE_NAME_LEN        40
 232 #define MAX_ACPI_CLASS_NAME_LEN         20
 233 typedef char acpi_bus_id[8];
 234 typedef u64 acpi_bus_address;
 235 typedef char acpi_device_name[MAX_ACPI_DEVICE_NAME_LEN];
 236 typedef char acpi_device_class[MAX_ACPI_CLASS_NAME_LEN];
 237
 238 struct acpi_hardware_id {
 239         struct list_head list;
 240         const char *id;
 241 };
 242
 243 struct acpi_pnp_type {
 244         u32 hardware_id:1;
 245         u32 bus_address:1;
 246         u32 platform_id:1;
 247         u32 backlight:1;
 248         u32 reserved:28;
 249 };
 250
 251 struct acpi_device_pnp {
 252         acpi_bus_id bus_id;             /* Object name */
 253         int instance_no;                /* Instance number of this object */
 254         struct acpi_pnp_type type;      /* ID type */
 255         acpi_bus_address bus_address;   /* _ADR */
 256         char *unique_id;                /* _UID */
 257         struct list_head ids;           /* _HID and _CIDs */
 258         acpi_device_name device_name;   /* Driver-determined */
 259         acpi_device_class device_class; /*        "          */
 260 };
 261
 262 #define acpi_device_bid(d)      ((d)->pnp.bus_id)
 263 #define acpi_device_adr(d)      ((d)->pnp.bus_address)
 264 const char *acpi_device_hid(struct acpi_device *device);
 265 #define acpi_device_uid(d)      ((d)->pnp.unique_id)
 266 #define acpi_device_name(d)     ((d)->pnp.device_name)
 267 #define acpi_device_class(d)    ((d)->pnp.device_class)
 268
 269 /* Power Management */
 270
 271 struct acpi_device_power_flags {
 272         u32 explicit_get:1;     /* _PSC present? */
 273         u32 power_resources:1;  /* Power resources */
 274         u32 inrush_current:1;   /* Serialize Dx->D0 */
 275         u32 power_removed:1;    /* Optimize Dx->D0 */
 276         u32 ignore_parent:1;    /* Power is independent of parent power state */
 277         u32 dsw_present:1;      /* _DSW present? */
 278         u32 reserved:26;
 279 };
 280
 281 struct acpi_device_power_state {
 282         struct list_head resources;     /* Power resources referenced */
 283         struct {
 284                 u8 valid:1;
 285                 u8 explicit_set:1;      /* _PSx present? */
 286                 u8 reserved:6;
 287         } flags;
 288         int power;              /* % Power (compared to D0) */
 289         int latency;            /* Dx->D0 time (microseconds) */
 290 };
 291
 292 struct acpi_device_power {
 293         int state;              /* Current state */
 294         struct acpi_device_power_flags flags;
 295         struct acpi_device_power_state states[ACPI_D_STATE_COUNT];      /* Power states (D0-D3Cold) */
 296         u8 state_for_enumeration; /* Deepest power state for enumeration */
 297 };
 298
 299 struct acpi_dep_data {
 300         struct list_head node;
 301         acpi_handle supplier;
 302         acpi_handle consumer;
 303         bool honor_dep;
 304         bool met;
 305         bool free_when_met;
 306 };
 307
 308 /* Performance Management */
 309
 310 struct acpi_device_perf_flags {
 311         u8 reserved:8;
 312 };
 313
 314 struct acpi_device_perf_state {
 315         struct {
 316                 u8 valid:1;
 317                 u8 reserved:7;
 318         } flags;
 319         u8 power;               /* % Power (compared to P0) */
 320         u8 performance;         /* % Performance (    "   ) */
 321         int latency;            /* Px->P0 time (microseconds) */
 322 };
 323
 324 struct acpi_device_perf {
 325         int state;
 326         struct acpi_device_perf_flags flags;
 327         int state_count;
 328         struct acpi_device_perf_state *states;
 329 };
 330
 331 /* Wakeup Management */
 332 struct acpi_device_wakeup_flags {
 333         u8 valid:1;             /* Can successfully enable wakeup? */
 334         u8 notifier_present:1;  /* Wake-up notify handler has been installed */
 335 };
 336
 337 struct acpi_device_wakeup_context {
 338         void (*func)(struct acpi_device_wakeup_context *context);
 339         struct device *dev;
 340 };
 341
 342 struct acpi_device_wakeup {
 343         acpi_handle gpe_device;
 344         u64 gpe_number;
 345         u64 sleep_state;
 346         struct list_head resources;
 347         struct acpi_device_wakeup_flags flags;
 348         struct acpi_device_wakeup_context context;
 349         struct wakeup_source *ws;
 350         int prepare_count;
 351         int enable_count;
 352 };
 353
 354 struct acpi_device_physical_node {
 355         struct list_head node;
 356         struct device *dev;
 357         unsigned int node_id;
 358         bool put_online:1;
 359 };
 360
 361 struct acpi_device_properties {
 362         struct list_head list;
 363         const guid_t *guid;
 364         union acpi_object *properties;
 365         void **bufs;
 366 };
 367
 368 /* ACPI Device Specific Data (_DSD) */
 369 struct acpi_device_data {
 370         const union acpi_object *pointer;
 371         struct list_head properties;
 372         const union acpi_object *of_compatible;
 373         struct list_head subnodes;
 374 };
 375
 376 struct acpi_gpio_mapping;
 377
 378 #define ACPI_DEVICE_SWNODE_ROOT                 0
 379
 380 /*
 381  * The maximum expected number of CSI-2 data lanes.
 382  *
 383  * This number is not expected to ever have to be equal to or greater than the
 384  * number of bits in an unsigned long variable, but if it needs to be increased
 385  * above that limit, code will need to be adjusted accordingly.
 386  */
 387 #define ACPI_DEVICE_CSI2_DATA_LANES             8
 388
 389 #define ACPI_DEVICE_SWNODE_PORT_NAME_LENGTH     8
 390
 391 enum acpi_device_swnode_dev_props {
 392         ACPI_DEVICE_SWNODE_DEV_ROTATION,
 393         ACPI_DEVICE_SWNODE_DEV_CLOCK_FREQUENCY,
 394         ACPI_DEVICE_SWNODE_DEV_LED_MAX_MICROAMP,
 395         ACPI_DEVICE_SWNODE_DEV_FLASH_MAX_MICROAMP,
 396         ACPI_DEVICE_SWNODE_DEV_FLASH_MAX_TIMEOUT_US,
 397         ACPI_DEVICE_SWNODE_DEV_NUM_OF,
 398         ACPI_DEVICE_SWNODE_DEV_NUM_ENTRIES
 399 };
 400
 401 enum acpi_device_swnode_port_props {
 402         ACPI_DEVICE_SWNODE_PORT_REG,
 403         ACPI_DEVICE_SWNODE_PORT_NUM_OF,
 404         ACPI_DEVICE_SWNODE_PORT_NUM_ENTRIES
 405 };
 406
 407 enum acpi_device_swnode_ep_props {
 408         ACPI_DEVICE_SWNODE_EP_REMOTE_EP,
 409         ACPI_DEVICE_SWNODE_EP_BUS_TYPE,
 410         ACPI_DEVICE_SWNODE_EP_REG,
 411         ACPI_DEVICE_SWNODE_EP_CLOCK_LANES,
 412         ACPI_DEVICE_SWNODE_EP_DATA_LANES,
 413         ACPI_DEVICE_SWNODE_EP_LANE_POLARITIES,
 414         /* TX only */
 415         ACPI_DEVICE_SWNODE_EP_LINK_FREQUENCIES,
 416         ACPI_DEVICE_SWNODE_EP_NUM_OF,
 417         ACPI_DEVICE_SWNODE_EP_NUM_ENTRIES
 418 };
 419
 420 /*
 421  * Each device has a root software node plus two times as many nodes as the
 422  * number of CSI-2 ports.
 423  */
 424 #define ACPI_DEVICE_SWNODE_PORT(port)   (2 * (port) + 1)
 425 #define ACPI_DEVICE_SWNODE_EP(endpoint) \
 426                 (ACPI_DEVICE_SWNODE_PORT(endpoint) + 1)
 427
 428 /**
 429  * struct acpi_device_software_node_port - MIPI DisCo for Imaging CSI-2 port
 430  * @port_name: Port name.
 431  * @data_lanes: "data-lanes" property values.
 432  * @lane_polarities: "lane-polarities" property values.
 433  * @link_frequencies: "link_frequencies" property values.
 434  * @port_nr: Port number.
 435  * @crs_crs2_local: _CRS CSI2 record present (i.e. this is a transmitter one).
 436  * @port_props: Port properties.
 437  * @ep_props: Endpoint properties.
 438  * @remote_ep: Reference to the remote endpoint.
 439  */
 440 struct acpi_device_software_node_port {
 441         char port_name[ACPI_DEVICE_SWNODE_PORT_NAME_LENGTH + 1];
 442         u32 data_lanes[ACPI_DEVICE_CSI2_DATA_LANES];
 443         u32 lane_polarities[ACPI_DEVICE_CSI2_DATA_LANES + 1 /* clock lane */];
 444         u64 link_frequencies[ACPI_DEVICE_CSI2_DATA_LANES];
 445         unsigned int port_nr;
 446         bool crs_csi2_local;
 447
 448         struct property_entry port_props[ACPI_DEVICE_SWNODE_PORT_NUM_ENTRIES];
 449         struct property_entry ep_props[ACPI_DEVICE_SWNODE_EP_NUM_ENTRIES];
 450
 451         struct software_node_ref_args remote_ep[1];
 452 };
 453
 454 /**
 455  * struct acpi_device_software_nodes - Software nodes for an ACPI device
 456  * @dev_props: Device properties.
 457  * @nodes: Software nodes for root as well as ports and endpoints.
 458  * @nodeprts: Array of software node pointers, for (un)registering them.
 459  * @ports: Information related to each port and endpoint within a port.
 460  * @num_ports: The number of ports.
 461  */
 462 struct acpi_device_software_nodes {
 463         struct property_entry dev_props[ACPI_DEVICE_SWNODE_DEV_NUM_ENTRIES];
 464         struct software_node *nodes;
 465         const struct software_node **nodeptrs;
 466         struct acpi_device_software_node_port *ports;
 467         unsigned int num_ports;
 468 };
 469
 470 /* Device */
 471 struct acpi_device {
 472         u32 pld_crc;
 473         int device_type;
 474         acpi_handle handle;             /* no handle for fixed hardware */
 475         struct fwnode_handle fwnode;
 476         struct list_head wakeup_list;
 477         struct list_head del_list;
 478         struct acpi_device_status status;
 479         struct acpi_device_flags flags;
 480         struct acpi_device_pnp pnp;
 481         struct acpi_device_power power;
 482         struct acpi_device_wakeup wakeup;
 483         struct acpi_device_perf performance;
 484         struct acpi_device_dir dir;
 485         struct acpi_device_data data;
 486         struct acpi_scan_handler *handler;
 487         struct acpi_hotplug_context *hp;
 488         struct acpi_device_software_nodes *swnodes;
 489         const struct acpi_gpio_mapping *driver_gpios;
 490         void *driver_data;
 491         struct device dev;
 492         unsigned int physical_node_count;
 493         unsigned int dep_unmet;
 494         struct list_head physical_node_list;
 495         struct mutex physical_node_lock;
 496         void (*remove)(struct acpi_device *);
 497 };
 498
 499 /* Non-device subnode */
 500 struct acpi_data_node {
 501         struct list_head sibling;
 502         const char *name;
 503         acpi_handle handle;
 504         struct fwnode_handle fwnode;
 505         struct fwnode_handle *parent;
 506         struct acpi_device_data data;
 507         struct kobject kobj;
 508         struct completion kobj_done;
 509 };
 510
 511 extern const struct fwnode_operations acpi_device_fwnode_ops;
 512 extern const struct fwnode_operations acpi_data_fwnode_ops;
 513 extern const struct fwnode_operations acpi_static_fwnode_ops;
 514
 515 bool is_acpi_device_node(const struct fwnode_handle *fwnode);
 516 bool is_acpi_data_node(const struct fwnode_handle *fwnode);
 517
 518 static inline bool is_acpi_node(const struct fwnode_handle *fwnode)
 519 {
 520         return (is_acpi_device_node(fwnode) || is_acpi_data_node(fwnode));
 521 }
 522
 523 #define to_acpi_device_node(__fwnode)                                   \
 524         ({                                                              \
 525                 typeof(__fwnode) __to_acpi_device_node_fwnode = __fwnode; \
 526                                                                         \
 527                 is_acpi_device_node(__to_acpi_device_node_fwnode) ?     \
 528                         container_of(__to_acpi_device_node_fwnode,      \
 529                                      struct acpi_device, fwnode) :      \
 530                         NULL;                                           \
 531         })
 532
 533 #define to_acpi_data_node(__fwnode)                                     \
 534         ({                                                              \
 535                 typeof(__fwnode) __to_acpi_data_node_fwnode = __fwnode; \
 536                                                                         \
 537                 is_acpi_data_node(__to_acpi_data_node_fwnode) ?         \
 538                         container_of(__to_acpi_data_node_fwnode,        \
 539                                      struct acpi_data_node, fwnode) :   \
 540                         NULL;                                           \
 541         })
 542
 543 static inline bool is_acpi_static_node(const struct fwnode_handle *fwnode)
 544 {
 545         return !IS_ERR_OR_NULL(fwnode) &&
 546                 fwnode->ops == &acpi_static_fwnode_ops;
 547 }
 548
 549 static inline bool acpi_data_node_match(const struct fwnode_handle *fwnode,
 550                                         const char *name)
 551 {
 552         return is_acpi_data_node(fwnode) ?
 553                 (!strcmp(to_acpi_data_node(fwnode)->name, name)) : false;
 554 }
 555
 556 static inline struct fwnode_handle *acpi_fwnode_handle(struct acpi_device *adev)
 557 {
 558         return &adev->fwnode;
 559 }
 560
 561 static inline void *acpi_driver_data(struct acpi_device *d)
 562 {
 563         return d->driver_data;
 564 }
 565
 566 #define to_acpi_device(d)       container_of(d, struct acpi_device, dev)
 567 #define to_acpi_driver(d)       container_of_const(d, struct acpi_driver, drv)
 568
 569 static inline struct acpi_device *acpi_dev_parent(struct acpi_device *adev)
 570 {
 571         if (adev->dev.parent)
 572                 return to_acpi_device(adev->dev.parent);
 573
 574         return NULL;
 575 }
 576
 577 static inline void acpi_set_device_status(struct acpi_device *adev, u32 sta)
 578 {
 579         *((u32 *)&adev->status) = sta;
 580 }
 581
 582 static inline void acpi_set_hp_context(struct acpi_device *adev,
 583                                        struct acpi_hotplug_context *hp)
 584 {
 585         hp->self = adev;
 586         adev->hp = hp;
 587 }
 588
 589 void acpi_initialize_hp_context(struct acpi_device *adev,
 590                                 struct acpi_hotplug_context *hp,
 591                                 acpi_hp_notify notify, acpi_hp_uevent uevent);
 592
 593 /* acpi_device.dev.bus == &acpi_bus_type */
 594 extern const struct bus_type acpi_bus_type;
 595
 596 int acpi_bus_for_each_dev(int (*fn)(struct device *, void *), void *data);
 597 int acpi_dev_for_each_child(struct acpi_device *adev,
 598                             int (*fn)(struct acpi_device *, void *), void *data);
 599 int acpi_dev_for_each_child_reverse(struct acpi_device *adev,
 600                                     int (*fn)(struct acpi_device *, void *),
 601                                     void *data);
 602
 603 /*
 604  * Events
 605  * ------
 606  */
 607
 608 struct acpi_bus_event {
 609         struct list_head node;
 610         acpi_device_class device_class;
 611         acpi_bus_id bus_id;
 612         u32 type;
 613         u32 data;
 614 };
 615
 616 extern struct kobject *acpi_kobj;
 617 extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
 618 void acpi_bus_private_data_handler(acpi_handle, void *);
 619 int acpi_bus_get_private_data(acpi_handle, void **);
 620 int acpi_bus_attach_private_data(acpi_handle, void *);
 621 void acpi_bus_detach_private_data(acpi_handle);
 622 int acpi_dev_install_notify_handler(struct acpi_device *adev,
 623                                     u32 handler_type,
 624                                     acpi_notify_handler handler, void *context);
 625 void acpi_dev_remove_notify_handler(struct acpi_device *adev,
 626                                     u32 handler_type,
 627                                     acpi_notify_handler handler);
 628 extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
 629 extern int register_acpi_notifier(struct notifier_block *);
 630 extern int unregister_acpi_notifier(struct notifier_block *);
 631
 632 /*
 633  * External Functions
 634  */
 635
 636 acpi_status acpi_bus_get_status_handle(acpi_handle handle,
 637                                        unsigned long long *sta);
 638 int acpi_bus_get_status(struct acpi_device *device);
 639
 640 int acpi_bus_set_power(acpi_handle handle, int state);
 641 const char *acpi_power_state_string(int state);
 642 int acpi_device_set_power(struct acpi_device *device, int state);
 643 int acpi_bus_init_power(struct acpi_device *device);
 644 int acpi_device_fix_up_power(struct acpi_device *device);
 645 void acpi_device_fix_up_power_extended(struct acpi_device *adev);
 646 void acpi_device_fix_up_power_children(struct acpi_device *adev);
 647 int acpi_bus_update_power(acpi_handle handle, int *state_p);
 648 int acpi_device_update_power(struct acpi_device *device, int *state_p);
 649 bool acpi_bus_power_manageable(acpi_handle handle);
 650 void acpi_dev_power_up_children_with_adr(struct acpi_device *adev);
 651 u8 acpi_dev_power_state_for_wake(struct acpi_device *adev);
 652 int acpi_device_power_add_dependent(struct acpi_device *adev,
 653                                     struct device *dev);
 654 void acpi_device_power_remove_dependent(struct acpi_device *adev,
 655                                         struct device *dev);
 656
 657 #ifdef CONFIG_PM
 658 bool acpi_bus_can_wakeup(acpi_handle handle);
 659 #else
 660 static inline bool acpi_bus_can_wakeup(acpi_handle handle) { return false; }
 661 #endif
 662
 663 void acpi_scan_lock_acquire(void);
 664 void acpi_scan_lock_release(void);
 665 void acpi_lock_hp_context(void);
 666 void acpi_unlock_hp_context(void);
 667 int acpi_scan_add_handler(struct acpi_scan_handler *handler);
 668 /*
 669  * use a macro to avoid include chaining to get THIS_MODULE
 670  */
 671 #define acpi_bus_register_driver(drv) \
 672         __acpi_bus_register_driver(drv, THIS_MODULE)
 673 int __acpi_bus_register_driver(struct acpi_driver *driver, struct module *owner);
 674 void acpi_bus_unregister_driver(struct acpi_driver *driver);
 675 int acpi_bus_scan(acpi_handle handle);
 676 void acpi_bus_trim(struct acpi_device *start);
 677 acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
 678 int acpi_match_device_ids(struct acpi_device *device,
 679                           const struct acpi_device_id *ids);
 680 void acpi_set_modalias(struct acpi_device *adev, const char *default_id,
 681                        char *modalias, size_t len);
 682
 683 static inline bool acpi_device_enumerated(struct acpi_device *adev)
 684 {
 685         return adev && adev->flags.initialized && adev->flags.visited;
 686 }
 687
 688 /**
 689  * module_acpi_driver(acpi_driver) - Helper macro for registering an ACPI driver
 690  * @__acpi_driver: acpi_driver struct
 691  *
 692  * Helper macro for ACPI drivers which do not do anything special in module
 693  * init/exit. This eliminates a lot of boilerplate. Each module may only
 694  * use this macro once, and calling it replaces module_init() and module_exit()
 695  */
 696 #define module_acpi_driver(__acpi_driver) \
 697         module_driver(__acpi_driver, acpi_bus_register_driver, \
 698                       acpi_bus_unregister_driver)
 699
 700 /*
 701  * Bind physical devices with ACPI devices
 702  */
 703 struct acpi_bus_type {
 704         struct list_head list;
 705         const char *name;
 706         bool (*match)(struct device *dev);
 707         struct acpi_device * (*find_companion)(struct device *);
 708         void (*setup)(struct device *);
 709 };
 710 int register_acpi_bus_type(struct acpi_bus_type *);
 711 int unregister_acpi_bus_type(struct acpi_bus_type *);
 712 int acpi_bind_one(struct device *dev, struct acpi_device *adev);
 713 int acpi_unbind_one(struct device *dev);
 714
 715 enum acpi_bridge_type {
 716         ACPI_BRIDGE_TYPE_PCIE = 1,
 717         ACPI_BRIDGE_TYPE_CXL,
 718 };
 719
 720 struct acpi_pci_root {
 721         struct acpi_device * device;
 722         struct pci_bus *bus;
 723         u16 segment;
 724         int bridge_type;
 725         struct resource secondary;      /* downstream bus range */
 726
 727         u32 osc_support_set;            /* _OSC state of support bits */
 728         u32 osc_control_set;            /* _OSC state of control bits */
 729         u32 osc_ext_support_set;        /* _OSC state of extended support bits */
 730         u32 osc_ext_control_set;        /* _OSC state of extended control bits */
 731         phys_addr_t mcfg_addr;
 732 };
 733
 734 /* helper */
 735
 736 struct iommu_ops;
 737
 738 bool acpi_dma_supported(const struct acpi_device *adev);
 739 enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev);
 740 int acpi_iommu_fwspec_init(struct device *dev, u32 id,
 741                            struct fwnode_handle *fwnode);
 742 int acpi_dma_get_range(struct device *dev, const struct bus_dma_region **map);
 743 int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr,
 744                            const u32 *input_id);
 745 static inline int acpi_dma_configure(struct device *dev,
 746                                      enum dev_dma_attr attr)
 747 {
 748         return acpi_dma_configure_id(dev, attr, NULL);
 749 }
 750 struct acpi_device *acpi_find_child_device(struct acpi_device *parent,
 751                                            u64 address, bool check_children);
 752 struct acpi_device *acpi_find_child_by_adr(struct acpi_device *adev,
 753                                            acpi_bus_address adr);
 754 int acpi_is_root_bridge(acpi_handle);
 755 struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle);
 756
 757 int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state);
 758 int acpi_disable_wakeup_device_power(struct acpi_device *dev);
 759
 760 #ifdef CONFIG_X86
 761 bool acpi_device_override_status(struct acpi_device *adev, unsigned long long *status);
 762 bool acpi_quirk_skip_acpi_ac_and_battery(void);
 763 int acpi_install_cmos_rtc_space_handler(acpi_handle handle);
 764 void acpi_remove_cmos_rtc_space_handler(acpi_handle handle);
 765 int acpi_quirk_skip_serdev_enumeration(struct device *controller_parent, bool *skip);
 766 #else
 767 static inline bool acpi_device_override_status(struct acpi_device *adev,
 768                                                unsigned long long *status)
 769 {
 770         return false;
 771 }
 772 static inline bool acpi_quirk_skip_acpi_ac_and_battery(void)
 773 {
 774         return false;
 775 }
 776 static inline int acpi_install_cmos_rtc_space_handler(acpi_handle handle)
 777 {
 778         return 1;
 779 }
 780 static inline void acpi_remove_cmos_rtc_space_handler(acpi_handle handle)
 781 {
 782 }
 783 static inline int
 784 acpi_quirk_skip_serdev_enumeration(struct device *controller_parent, bool *skip)
 785 {
 786         *skip = false;
 787         return 0;
 788 }
 789 #endif
 790
 791 #if IS_ENABLED(CONFIG_X86_ANDROID_TABLETS)
 792 bool acpi_quirk_skip_i2c_client_enumeration(struct acpi_device *adev);
 793 bool acpi_quirk_skip_gpio_event_handlers(void);
 794 #else
 795 static inline bool acpi_quirk_skip_i2c_client_enumeration(struct acpi_device *adev)
 796 {
 797         return false;
 798 }
 799 static inline bool acpi_quirk_skip_gpio_event_handlers(void)
 800 {
 801         return false;
 802 }
 803 #endif
 804
 805 #ifdef CONFIG_PM
 806 void acpi_pm_wakeup_event(struct device *dev);
 807 acpi_status acpi_add_pm_notifier(struct acpi_device *adev, struct device *dev,
 808                         void (*func)(struct acpi_device_wakeup_context *context));
 809 acpi_status acpi_remove_pm_notifier(struct acpi_device *adev);
 810 bool acpi_pm_device_can_wakeup(struct device *dev);
 811 int acpi_pm_device_sleep_state(struct device *, int *, int);
 812 int acpi_pm_set_device_wakeup(struct device *dev, bool enable);
 813 #else
 814 static inline void acpi_pm_wakeup_event(struct device *dev)
 815 {
 816 }
 817 static inline acpi_status acpi_add_pm_notifier(struct acpi_device *adev,
 818                                                struct device *dev,
 819                                                void (*func)(struct acpi_device_wakeup_context *context))
 820 {
 821         return AE_SUPPORT;
 822 }
 823 static inline acpi_status acpi_remove_pm_notifier(struct acpi_device *adev)
 824 {
 825         return AE_SUPPORT;
 826 }
 827 static inline bool acpi_pm_device_can_wakeup(struct device *dev)
 828 {
 829         return false;
 830 }
 831 static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m)
 832 {
 833         if (p)
 834                 *p = ACPI_STATE_D0;
 835
 836         return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3_COLD) ?
 837                 m : ACPI_STATE_D0;
 838 }
 839 static inline int acpi_pm_set_device_wakeup(struct device *dev, bool enable)
 840 {
 841         return -ENODEV;
 842 }
 843 #endif
 844
 845 #ifdef CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT
 846 bool acpi_sleep_state_supported(u8 sleep_state);
 847 #else
 848 static inline bool acpi_sleep_state_supported(u8 sleep_state) { return false; }
 849 #endif
 850
 851 #ifdef CONFIG_ACPI_SLEEP
 852 u32 acpi_target_system_state(void);
 853 #else
 854 static inline u32 acpi_target_system_state(void) { return ACPI_STATE_S0; }
 855 #endif
 856
 857 static inline bool acpi_device_power_manageable(struct acpi_device *adev)
 858 {
 859         return adev->flags.power_manageable;
 860 }
 861
 862 static inline bool acpi_device_can_wakeup(struct acpi_device *adev)
 863 {
 864         return adev->wakeup.flags.valid;
 865 }
 866
 867 static inline bool acpi_device_can_poweroff(struct acpi_device *adev)
 868 {
 869         return adev->power.states[ACPI_STATE_D3_COLD].flags.valid ||
 870                 ((acpi_gbl_FADT.header.revision < 6) &&
 871                 adev->power.states[ACPI_STATE_D3_HOT].flags.explicit_set);
 872 }
 873
 874 int acpi_dev_uid_to_integer(struct acpi_device *adev, u64 *integer);
 875
 876 static inline bool acpi_dev_hid_match(struct acpi_device *adev, const char *hid2)
 877 {
 878         const char *hid1 = acpi_device_hid(adev);
 879
 880         return hid1 && hid2 && !strcmp(hid1, hid2);
 881 }
 882
 883 static inline bool acpi_str_uid_match(struct acpi_device *adev, const char *uid2)
 884 {
 885         const char *uid1 = acpi_device_uid(adev);
 886
 887         return uid1 && uid2 && !strcmp(uid1, uid2);
 888 }
 889
 890 static inline bool acpi_int_uid_match(struct acpi_device *adev, u64 uid2)
 891 {
 892         u64 uid1;
 893
 894         return !acpi_dev_uid_to_integer(adev, &uid1) && uid1 == uid2;
 895 }
 896
 897 #define TYPE_ENTRY(type, x)                     \
 898         const type: x,                          \
 899         type: x
 900
 901 #define ACPI_STR_TYPES(match)                   \
 902         TYPE_ENTRY(unsigned char *, match),     \
 903         TYPE_ENTRY(signed char *, match),               \
 904         TYPE_ENTRY(char *, match),              \
 905         TYPE_ENTRY(void *, match)
 906
 907 /**
 908  * acpi_dev_uid_match - Match device by supplied UID
 909  * @adev: ACPI device to match.
 910  * @uid2: Unique ID of the device.
 911  *
 912  * Matches UID in @adev with given @uid2.
 913  *
 914  * Returns: %true if matches, %false otherwise.
 915  */
 916 #define acpi_dev_uid_match(adev, uid2)                                  \
 917         _Generic(uid2,                                                  \
 918                  /* Treat @uid2 as a string for acpi string types */    \
 919                  ACPI_STR_TYPES(acpi_str_uid_match),                    \
 920                  /* Treat as an integer otherwise */                    \
 921                  default: acpi_int_uid_match)(adev, uid2)
 922
 923 /**
 924  * acpi_dev_hid_uid_match - Match device by supplied HID and UID
 925  * @adev: ACPI device to match.
 926  * @hid2: Hardware ID of the device.
 927  * @uid2: Unique ID of the device, pass NULL to not check _UID.
 928  *
 929  * Matches HID and UID in @adev with given @hid2 and @uid2. Absence of @uid2
 930  * will be treated as a match. If user wants to validate @uid2, it should be
 931  * done before calling this function.
 932  *
 933  * Returns: %true if matches or @uid2 is NULL, %false otherwise.
 934  */
 935 #define acpi_dev_hid_uid_match(adev, hid2, uid2)                        \
 936         (acpi_dev_hid_match(adev, hid2) &&                              \
 937                 /* Distinguish integer 0 from NULL @uid2 */             \
 938                 (_Generic(uid2, ACPI_STR_TYPES(!(uid2)), default: 0) || \
 939                 acpi_dev_uid_match(adev, uid2)))
 940
 941 void acpi_dev_clear_dependencies(struct acpi_device *supplier);
 942 bool acpi_dev_ready_for_enumeration(const struct acpi_device *device);
 943 struct acpi_device *acpi_dev_get_next_consumer_dev(struct acpi_device *supplier,
 944                                                    struct acpi_device *start);
 945
 946 /**
 947  * for_each_acpi_consumer_dev - iterate over the consumer ACPI devices for a
 948  *                              given supplier
 949  * @supplier: Pointer to the supplier's ACPI device
 950  * @consumer: Pointer to &struct acpi_device to hold the consumer, initially NULL
 951  */
 952 #define for_each_acpi_consumer_dev(supplier, consumer)                  \
 953         for (consumer = acpi_dev_get_next_consumer_dev(supplier, NULL); \
 954              consumer;                                                  \
 955              consumer = acpi_dev_get_next_consumer_dev(supplier, consumer))
 956
 957 struct acpi_device *
 958 acpi_dev_get_next_match_dev(struct acpi_device *adev, const char *hid, const char *uid, s64 hrv);
 959 struct acpi_device *
 960 acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv);
 961
 962 /**
 963  * for_each_acpi_dev_match - iterate over ACPI devices that matching the criteria
 964  * @adev: pointer to the matching ACPI device, NULL at the end of the loop
 965  * @hid: Hardware ID of the device.
 966  * @uid: Unique ID of the device, pass NULL to not check _UID
 967  * @hrv: Hardware Revision of the device, pass -1 to not check _HRV
 968  *
 969  * The caller is responsible for invoking acpi_dev_put() on the returned device.
 970  */
 971 #define for_each_acpi_dev_match(adev, hid, uid, hrv)                    \
 972         for (adev = acpi_dev_get_first_match_dev(hid, uid, hrv);        \
 973              adev;                                                      \
 974              adev = acpi_dev_get_next_match_dev(adev, hid, uid, hrv))
 975
 976 static inline struct acpi_device *acpi_dev_get(struct acpi_device *adev)
 977 {
 978         return adev ? to_acpi_device(get_device(&adev->dev)) : NULL;
 979 }
 980
 981 static inline void acpi_dev_put(struct acpi_device *adev)
 982 {
 983         if (adev)
 984                 put_device(&adev->dev);
 985 }
 986
 987 struct acpi_device *acpi_fetch_acpi_dev(acpi_handle handle);
 988 struct acpi_device *acpi_get_acpi_dev(acpi_handle handle);
 989
 990 static inline void acpi_put_acpi_dev(struct acpi_device *adev)
 991 {
 992         acpi_dev_put(adev);
 993 }
 994
 995 int acpi_wait_for_acpi_ipmi(void);
 996
 997 int acpi_scan_add_dep(acpi_handle handle, struct acpi_handle_list *dep_devices);
 998 u32 arch_acpi_add_auto_dep(acpi_handle handle);
 999 #else   /* CONFIG_ACPI */
1000
1001 static inline int register_acpi_bus_type(void *bus) { return 0; }
1002 static inline int unregister_acpi_bus_type(void *bus) { return 0; }
1003
1004 static inline int acpi_wait_for_acpi_ipmi(void) { return 0; }
1005
1006 #endif                          /* CONFIG_ACPI */
1007
1008 #endif /*__ACPI_BUS_H__*/