4 * PCI defines and function prototypes
5 * Copyright 1994, Drew Eckhardt
6 * Copyright 1997--1999 Martin Mares <mj@ucw.cz>
8 * For more information, please consult the following manuals (look at
9 * http://www.pcisig.com/ for how to get them):
11 * PCI BIOS Specification
12 * PCI Local Bus Specification
13 * PCI to PCI Bridge Specification
14 * PCI System Design Guide
20 #include <linux/mod_devicetable.h>
22 #include <linux/types.h>
23 #include <linux/init.h>
24 #include <linux/ioport.h>
25 #include <linux/list.h>
26 #include <linux/compiler.h>
27 #include <linux/errno.h>
28 #include <linux/kobject.h>
29 #include <linux/atomic.h>
30 #include <linux/device.h>
32 #include <linux/irqreturn.h>
33 #include <uapi/linux/pci.h>
35 /* Include the ID list */
36 #include <linux/pci_ids.h>
38 /* pci_slot represents a physical slot */
40 struct pci_bus *bus; /* The bus this slot is on */
41 struct list_head list; /* node in list of slots on this bus */
42 struct hotplug_slot *hotplug; /* Hotplug info (migrate over time) */
43 unsigned char number; /* PCI_SLOT(pci_dev->devfn) */
47 static inline const char *pci_slot_name(const struct pci_slot *slot)
49 return kobject_name(&slot->kobj);
52 /* File state for mmap()s on /proc/bus/pci/X/Y */
58 /* This defines the direction arg to the DMA mapping routines. */
59 #define PCI_DMA_BIDIRECTIONAL 0
60 #define PCI_DMA_TODEVICE 1
61 #define PCI_DMA_FROMDEVICE 2
62 #define PCI_DMA_NONE 3
65 * For PCI devices, the region numbers are assigned this way:
68 /* #0-5: standard PCI resources */
70 PCI_STD_RESOURCE_END = 5,
72 /* #6: expansion ROM resource */
75 /* device specific resources */
78 PCI_IOV_RESOURCE_END = PCI_IOV_RESOURCES + PCI_SRIOV_NUM_BARS - 1,
81 /* resources assigned to buses behind the bridge */
82 #define PCI_BRIDGE_RESOURCE_NUM 4
85 PCI_BRIDGE_RESOURCE_END = PCI_BRIDGE_RESOURCES +
86 PCI_BRIDGE_RESOURCE_NUM - 1,
88 /* total resources associated with a PCI device */
91 /* preserve this for compatibility */
92 DEVICE_COUNT_RESOURCE = PCI_NUM_RESOURCES,
95 typedef int __bitwise pci_power_t;
97 #define PCI_D0 ((pci_power_t __force) 0)
98 #define PCI_D1 ((pci_power_t __force) 1)
99 #define PCI_D2 ((pci_power_t __force) 2)
100 #define PCI_D3hot ((pci_power_t __force) 3)
101 #define PCI_D3cold ((pci_power_t __force) 4)
102 #define PCI_UNKNOWN ((pci_power_t __force) 5)
103 #define PCI_POWER_ERROR ((pci_power_t __force) -1)
105 /* Remember to update this when the list above changes! */
106 extern const char *pci_power_names[];
108 static inline const char *pci_power_name(pci_power_t state)
110 return pci_power_names[1 + (int) state];
113 #define PCI_PM_D2_DELAY 200
114 #define PCI_PM_D3_WAIT 10
115 #define PCI_PM_D3COLD_WAIT 100
116 #define PCI_PM_BUS_WAIT 50
118 /** The pci_channel state describes connectivity between the CPU and
119 * the pci device. If some PCI bus between here and the pci device
120 * has crashed or locked up, this info is reflected here.
122 typedef unsigned int __bitwise pci_channel_state_t;
124 enum pci_channel_state {
125 /* I/O channel is in normal state */
126 pci_channel_io_normal = (__force pci_channel_state_t) 1,
128 /* I/O to channel is blocked */
129 pci_channel_io_frozen = (__force pci_channel_state_t) 2,
131 /* PCI card is dead */
132 pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
135 typedef unsigned int __bitwise pcie_reset_state_t;
137 enum pcie_reset_state {
138 /* Reset is NOT asserted (Use to deassert reset) */
139 pcie_deassert_reset = (__force pcie_reset_state_t) 1,
141 /* Use #PERST to reset PCI-E device */
142 pcie_warm_reset = (__force pcie_reset_state_t) 2,
144 /* Use PCI-E Hot Reset to reset device */
145 pcie_hot_reset = (__force pcie_reset_state_t) 3
148 typedef unsigned short __bitwise pci_dev_flags_t;
150 /* INTX_DISABLE in PCI_COMMAND register disables MSI
153 PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG = (__force pci_dev_flags_t) 1,
154 /* Device configuration is irrevocably lost if disabled into D3 */
155 PCI_DEV_FLAGS_NO_D3 = (__force pci_dev_flags_t) 2,
156 /* Provide indication device is assigned by a Virtual Machine Manager */
157 PCI_DEV_FLAGS_ASSIGNED = (__force pci_dev_flags_t) 4,
160 enum pci_irq_reroute_variant {
161 INTEL_IRQ_REROUTE_VARIANT = 1,
162 MAX_IRQ_REROUTE_VARIANTS = 3
165 typedef unsigned short __bitwise pci_bus_flags_t;
167 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
168 PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2,
171 /* Based on the PCI Hotplug Spec, but some values are made up by us */
173 PCI_SPEED_33MHz = 0x00,
174 PCI_SPEED_66MHz = 0x01,
175 PCI_SPEED_66MHz_PCIX = 0x02,
176 PCI_SPEED_100MHz_PCIX = 0x03,
177 PCI_SPEED_133MHz_PCIX = 0x04,
178 PCI_SPEED_66MHz_PCIX_ECC = 0x05,
179 PCI_SPEED_100MHz_PCIX_ECC = 0x06,
180 PCI_SPEED_133MHz_PCIX_ECC = 0x07,
181 PCI_SPEED_66MHz_PCIX_266 = 0x09,
182 PCI_SPEED_100MHz_PCIX_266 = 0x0a,
183 PCI_SPEED_133MHz_PCIX_266 = 0x0b,
189 PCI_SPEED_66MHz_PCIX_533 = 0x11,
190 PCI_SPEED_100MHz_PCIX_533 = 0x12,
191 PCI_SPEED_133MHz_PCIX_533 = 0x13,
192 PCIE_SPEED_2_5GT = 0x14,
193 PCIE_SPEED_5_0GT = 0x15,
194 PCIE_SPEED_8_0GT = 0x16,
195 PCI_SPEED_UNKNOWN = 0xff,
198 struct pci_cap_saved_data {
204 struct pci_cap_saved_state {
205 struct hlist_node next;
206 struct pci_cap_saved_data cap;
209 struct pcie_link_state;
215 * The pci_dev structure is used to describe PCI devices.
218 struct list_head bus_list; /* node in per-bus list */
219 struct pci_bus *bus; /* bus this device is on */
220 struct pci_bus *subordinate; /* bus this device bridges to */
222 void *sysdata; /* hook for sys-specific extension */
223 struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */
224 struct pci_slot *slot; /* Physical slot this device is in */
226 unsigned int devfn; /* encoded device & function index */
227 unsigned short vendor;
228 unsigned short device;
229 unsigned short subsystem_vendor;
230 unsigned short subsystem_device;
231 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
232 u8 revision; /* PCI revision, low byte of class word */
233 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
234 u8 pcie_cap; /* PCI-E capability offset */
235 u8 pcie_mpss:3; /* PCI-E Max Payload Size Supported */
236 u8 rom_base_reg; /* which config register controls the ROM */
237 u8 pin; /* which interrupt pin this device uses */
238 u16 pcie_flags_reg; /* cached PCI-E Capabilities Register */
240 struct pci_driver *driver; /* which driver has allocated this device */
241 u64 dma_mask; /* Mask of the bits of bus address this
242 device implements. Normally this is
243 0xffffffff. You only need to change
244 this if your device has broken DMA
245 or supports 64-bit transfers. */
247 struct device_dma_parameters dma_parms;
249 pci_power_t current_state; /* Current operating state. In ACPI-speak,
250 this is D0-D3, D0 being fully functional,
252 int pm_cap; /* PM capability offset in the
253 configuration space */
254 unsigned int pme_support:5; /* Bitmask of states from which PME#
256 unsigned int pme_interrupt:1;
257 unsigned int pme_poll:1; /* Poll device's PME status bit */
258 unsigned int d1_support:1; /* Low power state D1 is supported */
259 unsigned int d2_support:1; /* Low power state D2 is supported */
260 unsigned int no_d1d2:1; /* D1 and D2 are forbidden */
261 unsigned int no_d3cold:1; /* D3cold is forbidden */
262 unsigned int d3cold_allowed:1; /* D3cold is allowed by user */
263 unsigned int mmio_always_on:1; /* disallow turning off io/mem
264 decoding during bar sizing */
265 unsigned int wakeup_prepared:1;
266 unsigned int runtime_d3cold:1; /* whether go through runtime
267 D3cold, not set for devices
268 powered on/off by the
269 corresponding bridge */
270 unsigned int d3_delay; /* D3->D0 transition time in ms */
271 unsigned int d3cold_delay; /* D3cold->D0 transition time in ms */
273 #ifdef CONFIG_PCIEASPM
274 struct pcie_link_state *link_state; /* ASPM link state. */
277 pci_channel_state_t error_state; /* current connectivity state */
278 struct device dev; /* Generic device interface */
280 int cfg_size; /* Size of configuration space */
283 * Instead of touching interrupt line and base address registers
284 * directly, use the values stored here. They might be different!
287 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
289 bool match_driver; /* Skip attaching driver */
290 /* These fields are used by common fixups */
291 unsigned int transparent:1; /* Transparent PCI bridge */
292 unsigned int multifunction:1;/* Part of multi-function device */
293 /* keep track of device state */
294 unsigned int is_added:1;
295 unsigned int is_busmaster:1; /* device is busmaster */
296 unsigned int no_msi:1; /* device may not use msi */
297 unsigned int block_cfg_access:1; /* config space access is blocked */
298 unsigned int broken_parity_status:1; /* Device generates false positive parity */
299 unsigned int irq_reroute_variant:2; /* device needs IRQ rerouting variant */
300 unsigned int msi_enabled:1;
301 unsigned int msix_enabled:1;
302 unsigned int ari_enabled:1; /* ARI forwarding */
303 unsigned int is_managed:1;
304 unsigned int is_pcie:1; /* Obsolete. Will be removed.
305 Use pci_is_pcie() instead */
306 unsigned int needs_freset:1; /* Dev requires fundamental reset */
307 unsigned int state_saved:1;
308 unsigned int is_physfn:1;
309 unsigned int is_virtfn:1;
310 unsigned int reset_fn:1;
311 unsigned int is_hotplug_bridge:1;
312 unsigned int __aer_firmware_first_valid:1;
313 unsigned int __aer_firmware_first:1;
314 unsigned int broken_intx_masking:1;
315 unsigned int io_window_1k:1; /* Intel P2P bridge 1K I/O windows */
316 pci_dev_flags_t dev_flags;
317 atomic_t enable_cnt; /* pci_enable_device has been called */
319 u32 saved_config_space[16]; /* config space saved at suspend time */
320 struct hlist_head saved_cap_space;
321 struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
322 int rom_attr_enabled; /* has display of the rom attribute been enabled? */
323 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
324 struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
325 #ifdef CONFIG_PCI_MSI
326 struct list_head msi_list;
327 struct kset *msi_kset;
330 #ifdef CONFIG_PCI_ATS
332 struct pci_sriov *sriov; /* SR-IOV capability related */
333 struct pci_dev *physfn; /* the PF this VF is associated with */
335 struct pci_ats *ats; /* Address Translation Service */
337 phys_addr_t rom; /* Physical address of ROM if it's not from the BAR */
338 size_t romlen; /* Length of ROM if it's not from the BAR */
341 static inline struct pci_dev *pci_physfn(struct pci_dev *dev)
343 #ifdef CONFIG_PCI_IOV
351 extern struct pci_dev *alloc_pci_dev(void);
353 #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
354 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
356 static inline int pci_channel_offline(struct pci_dev *pdev)
358 return (pdev->error_state != pci_channel_io_normal);
361 extern struct resource busn_resource;
363 struct pci_host_bridge_window {
364 struct list_head list;
365 struct resource *res; /* host bridge aperture (CPU address) */
366 resource_size_t offset; /* bus address + offset = CPU address */
369 struct pci_host_bridge {
371 struct pci_bus *bus; /* root bus */
372 struct list_head windows; /* pci_host_bridge_windows */
373 void (*release_fn)(struct pci_host_bridge *);
377 #define to_pci_host_bridge(n) container_of(n, struct pci_host_bridge, dev)
378 void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
379 void (*release_fn)(struct pci_host_bridge *),
382 int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge);
385 * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond
386 * to P2P or CardBus bridge windows) go in a table. Additional ones (for
387 * buses below host bridges or subtractive decode bridges) go in the list.
388 * Use pci_bus_for_each_resource() to iterate through all the resources.
392 * PCI_SUBTRACTIVE_DECODE means the bridge forwards the window implicitly
393 * and there's no way to program the bridge with the details of the window.
394 * This does not apply to ACPI _CRS windows, even with the _DEC subtractive-
395 * decode bit set, because they are explicit and can be programmed with _SRS.
397 #define PCI_SUBTRACTIVE_DECODE 0x1
399 struct pci_bus_resource {
400 struct list_head list;
401 struct resource *res;
405 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
408 struct list_head node; /* node in list of buses */
409 struct pci_bus *parent; /* parent bus this bridge is on */
410 struct list_head children; /* list of child buses */
411 struct list_head devices; /* list of devices on this bus */
412 struct pci_dev *self; /* bridge device as seen by parent */
413 struct list_head slots; /* list of slots on this bus */
414 struct resource *resource[PCI_BRIDGE_RESOURCE_NUM];
415 struct list_head resources; /* address space routed to this bus */
416 struct resource busn_res; /* bus numbers routed to this bus */
418 struct pci_ops *ops; /* configuration access functions */
419 void *sysdata; /* hook for sys-specific extension */
420 struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
422 unsigned char number; /* bus number */
423 unsigned char primary; /* number of primary bridge */
424 unsigned char max_bus_speed; /* enum pci_bus_speed */
425 unsigned char cur_bus_speed; /* enum pci_bus_speed */
429 unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */
430 pci_bus_flags_t bus_flags; /* Inherited by child busses */
431 struct device *bridge;
433 struct bin_attribute *legacy_io; /* legacy I/O for this bus */
434 struct bin_attribute *legacy_mem; /* legacy mem */
435 unsigned int is_added:1;
438 #define pci_bus_b(n) list_entry(n, struct pci_bus, node)
439 #define to_pci_bus(n) container_of(n, struct pci_bus, dev)
442 * Returns true if the pci bus is root (behind host-pci bridge),
445 static inline bool pci_is_root_bus(struct pci_bus *pbus)
447 return !(pbus->parent);
450 #ifdef CONFIG_PCI_MSI
451 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev)
453 return pci_dev->msi_enabled || pci_dev->msix_enabled;
456 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false; }
460 * Error values that may be returned by PCI functions.
462 #define PCIBIOS_SUCCESSFUL 0x00
463 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
464 #define PCIBIOS_BAD_VENDOR_ID 0x83
465 #define PCIBIOS_DEVICE_NOT_FOUND 0x86
466 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87
467 #define PCIBIOS_SET_FAILED 0x88
468 #define PCIBIOS_BUFFER_TOO_SMALL 0x89
471 * Translate above to generic errno for passing back through non-pci.
473 static inline int pcibios_err_to_errno(int err)
475 if (err <= PCIBIOS_SUCCESSFUL)
476 return err; /* Assume already errno */
479 case PCIBIOS_FUNC_NOT_SUPPORTED:
481 case PCIBIOS_BAD_VENDOR_ID:
483 case PCIBIOS_DEVICE_NOT_FOUND:
485 case PCIBIOS_BAD_REGISTER_NUMBER:
487 case PCIBIOS_SET_FAILED:
489 case PCIBIOS_BUFFER_TOO_SMALL:
496 /* Low-level architecture-dependent routines */
499 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
500 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
504 * ACPI needs to be able to access PCI config space before we've done a
505 * PCI bus scan and created pci_bus structures.
507 extern int raw_pci_read(unsigned int domain, unsigned int bus,
508 unsigned int devfn, int reg, int len, u32 *val);
509 extern int raw_pci_write(unsigned int domain, unsigned int bus,
510 unsigned int devfn, int reg, int len, u32 val);
512 struct pci_bus_region {
513 resource_size_t start;
518 spinlock_t lock; /* protects list, index */
519 struct list_head list; /* for IDs added at runtime */
522 /* ---------------------------------------------------------------- */
523 /** PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
524 * a set of callbacks in struct pci_error_handlers, then that device driver
525 * will be notified of PCI bus errors, and will be driven to recovery
526 * when an error occurs.
529 typedef unsigned int __bitwise pci_ers_result_t;
531 enum pci_ers_result {
532 /* no result/none/not supported in device driver */
533 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
535 /* Device driver can recover without slot reset */
536 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
538 /* Device driver wants slot to be reset. */
539 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
541 /* Device has completely failed, is unrecoverable */
542 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
544 /* Device driver is fully recovered and operational */
545 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
547 /* No AER capabilities registered for the driver */
548 PCI_ERS_RESULT_NO_AER_DRIVER = (__force pci_ers_result_t) 6,
551 /* PCI bus error event callbacks */
552 struct pci_error_handlers {
553 /* PCI bus error detected on this device */
554 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
555 enum pci_channel_state error);
557 /* MMIO has been re-enabled, but not DMA */
558 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
560 /* PCI Express link has been reset */
561 pci_ers_result_t (*link_reset)(struct pci_dev *dev);
563 /* PCI slot has been reset */
564 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
566 /* Device driver may resume normal operations */
567 void (*resume)(struct pci_dev *dev);
570 /* ---------------------------------------------------------------- */
574 struct list_head node;
576 const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */
577 int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
578 void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
579 int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */
580 int (*suspend_late) (struct pci_dev *dev, pm_message_t state);
581 int (*resume_early) (struct pci_dev *dev);
582 int (*resume) (struct pci_dev *dev); /* Device woken up */
583 void (*shutdown) (struct pci_dev *dev);
584 int (*sriov_configure) (struct pci_dev *dev, int num_vfs); /* PF pdev */
585 const struct pci_error_handlers *err_handler;
586 struct device_driver driver;
587 struct pci_dynids dynids;
590 #define to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
593 * DEFINE_PCI_DEVICE_TABLE - macro used to describe a pci device table
594 * @_table: device table name
596 * This macro is used to create a struct pci_device_id array (a device table)
597 * in a generic manner.
599 #define DEFINE_PCI_DEVICE_TABLE(_table) \
600 const struct pci_device_id _table[]
603 * PCI_DEVICE - macro used to describe a specific pci device
604 * @vend: the 16 bit PCI Vendor ID
605 * @dev: the 16 bit PCI Device ID
607 * This macro is used to create a struct pci_device_id that matches a
608 * specific device. The subvendor and subdevice fields will be set to
611 #define PCI_DEVICE(vend,dev) \
612 .vendor = (vend), .device = (dev), \
613 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
616 * PCI_DEVICE_SUB - macro used to describe a specific pci device with subsystem
617 * @vend: the 16 bit PCI Vendor ID
618 * @dev: the 16 bit PCI Device ID
619 * @subvend: the 16 bit PCI Subvendor ID
620 * @subdev: the 16 bit PCI Subdevice ID
622 * This macro is used to create a struct pci_device_id that matches a
623 * specific device with subsystem information.
625 #define PCI_DEVICE_SUB(vend, dev, subvend, subdev) \
626 .vendor = (vend), .device = (dev), \
627 .subvendor = (subvend), .subdevice = (subdev)
630 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
631 * @dev_class: the class, subclass, prog-if triple for this device
632 * @dev_class_mask: the class mask for this device
634 * This macro is used to create a struct pci_device_id that matches a
635 * specific PCI class. The vendor, device, subvendor, and subdevice
636 * fields will be set to PCI_ANY_ID.
638 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
639 .class = (dev_class), .class_mask = (dev_class_mask), \
640 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
641 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
644 * PCI_VDEVICE - macro used to describe a specific pci device in short form
645 * @vendor: the vendor name
646 * @device: the 16 bit PCI Device ID
648 * This macro is used to create a struct pci_device_id that matches a
649 * specific PCI device. The subvendor, and subdevice fields will be set
650 * to PCI_ANY_ID. The macro allows the next field to follow as the device
654 #define PCI_VDEVICE(vendor, device) \
655 PCI_VENDOR_ID_##vendor, (device), \
656 PCI_ANY_ID, PCI_ANY_ID, 0, 0
658 /* these external functions are only available when PCI support is enabled */
661 extern void pcie_bus_configure_settings(struct pci_bus *bus, u8 smpss);
663 enum pcie_bus_config_types {
666 PCIE_BUS_PERFORMANCE,
670 extern enum pcie_bus_config_types pcie_bus_config;
672 extern struct bus_type pci_bus_type;
674 /* Do NOT directly access these two variables, unless you are arch specific pci
675 * code, or pci core code. */
676 extern struct list_head pci_root_buses; /* list of all known PCI buses */
677 /* Some device drivers need know if pci is initiated */
678 extern int no_pci_devices(void);
680 void pcibios_resource_survey_bus(struct pci_bus *bus);
681 void pcibios_fixup_bus(struct pci_bus *);
682 int __must_check pcibios_enable_device(struct pci_dev *, int mask);
683 /* Architecture specific versions may override this (weak) */
684 char *pcibios_setup(char *str);
686 /* Used only when drivers/pci/setup.c is used */
687 resource_size_t pcibios_align_resource(void *, const struct resource *,
690 void pcibios_update_irq(struct pci_dev *, int irq);
692 /* Weak but can be overriden by arch */
693 void pci_fixup_cardbus(struct pci_bus *);
695 /* Generic PCI functions used internally */
697 void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
698 struct resource *res);
699 void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
700 struct pci_bus_region *region);
701 void pcibios_scan_specific_bus(int busn);
702 extern struct pci_bus *pci_find_bus(int domain, int busnr);
703 void pci_bus_add_devices(const struct pci_bus *bus);
704 struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus,
705 struct pci_ops *ops, void *sysdata);
706 struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata);
707 struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
708 struct pci_ops *ops, void *sysdata,
709 struct list_head *resources);
710 int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax);
711 int pci_bus_update_busn_res_end(struct pci_bus *b, int busmax);
712 void pci_bus_release_busn_res(struct pci_bus *b);
713 struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
714 struct pci_ops *ops, void *sysdata,
715 struct list_head *resources);
716 struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
718 void pcie_update_link_speed(struct pci_bus *bus, u16 link_status);
719 struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
721 struct hotplug_slot *hotplug);
722 void pci_destroy_slot(struct pci_slot *slot);
723 void pci_renumber_slot(struct pci_slot *slot, int slot_nr);
724 int pci_scan_slot(struct pci_bus *bus, int devfn);
725 struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
726 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
727 unsigned int pci_scan_child_bus(struct pci_bus *bus);
728 int __must_check pci_bus_add_device(struct pci_dev *dev);
729 void pci_read_bridge_bases(struct pci_bus *child);
730 struct resource *pci_find_parent_resource(const struct pci_dev *dev,
731 struct resource *res);
732 u8 pci_swizzle_interrupt_pin(const struct pci_dev *dev, u8 pin);
733 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
734 u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp);
735 extern struct pci_dev *pci_dev_get(struct pci_dev *dev);
736 extern void pci_dev_put(struct pci_dev *dev);
737 extern void pci_remove_bus(struct pci_bus *b);
738 extern void pci_stop_and_remove_bus_device(struct pci_dev *dev);
739 void pci_stop_root_bus(struct pci_bus *bus);
740 void pci_remove_root_bus(struct pci_bus *bus);
741 void pci_setup_cardbus(struct pci_bus *bus);
742 extern void pci_sort_breadthfirst(void);
743 #define dev_is_pci(d) ((d)->bus == &pci_bus_type)
744 #define dev_is_pf(d) ((dev_is_pci(d) ? to_pci_dev(d)->is_physfn : false))
745 #define dev_num_vf(d) ((dev_is_pci(d) ? pci_num_vf(to_pci_dev(d)) : 0))
747 /* Generic PCI functions exported to card drivers */
749 enum pci_lost_interrupt_reason {
750 PCI_LOST_IRQ_NO_INFORMATION = 0,
751 PCI_LOST_IRQ_DISABLE_MSI,
752 PCI_LOST_IRQ_DISABLE_MSIX,
753 PCI_LOST_IRQ_DISABLE_ACPI,
755 enum pci_lost_interrupt_reason pci_lost_interrupt(struct pci_dev *dev);
756 int pci_find_capability(struct pci_dev *dev, int cap);
757 int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
758 int pci_find_ext_capability(struct pci_dev *dev, int cap);
759 int pci_find_next_ext_capability(struct pci_dev *dev, int pos, int cap);
760 int pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
761 int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap);
762 struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
764 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
765 struct pci_dev *from);
766 struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
767 unsigned int ss_vendor, unsigned int ss_device,
768 struct pci_dev *from);
769 struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
770 struct pci_dev *pci_get_domain_bus_and_slot(int domain, unsigned int bus,
772 static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
775 return pci_get_domain_bus_and_slot(0, bus, devfn);
777 struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
778 int pci_dev_present(const struct pci_device_id *ids);
780 int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn,
782 int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn,
783 int where, u16 *val);
784 int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn,
785 int where, u32 *val);
786 int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
788 int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn,
790 int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,
792 struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops);
794 static inline int pci_read_config_byte(const struct pci_dev *dev, int where, u8 *val)
796 return pci_bus_read_config_byte(dev->bus, dev->devfn, where, val);
798 static inline int pci_read_config_word(const struct pci_dev *dev, int where, u16 *val)
800 return pci_bus_read_config_word(dev->bus, dev->devfn, where, val);
802 static inline int pci_read_config_dword(const struct pci_dev *dev, int where,
805 return pci_bus_read_config_dword(dev->bus, dev->devfn, where, val);
807 static inline int pci_write_config_byte(const struct pci_dev *dev, int where, u8 val)
809 return pci_bus_write_config_byte(dev->bus, dev->devfn, where, val);
811 static inline int pci_write_config_word(const struct pci_dev *dev, int where, u16 val)
813 return pci_bus_write_config_word(dev->bus, dev->devfn, where, val);
815 static inline int pci_write_config_dword(const struct pci_dev *dev, int where,
818 return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val);
821 int pcie_capability_read_word(struct pci_dev *dev, int pos, u16 *val);
822 int pcie_capability_read_dword(struct pci_dev *dev, int pos, u32 *val);
823 int pcie_capability_write_word(struct pci_dev *dev, int pos, u16 val);
824 int pcie_capability_write_dword(struct pci_dev *dev, int pos, u32 val);
825 int pcie_capability_clear_and_set_word(struct pci_dev *dev, int pos,
827 int pcie_capability_clear_and_set_dword(struct pci_dev *dev, int pos,
830 static inline int pcie_capability_set_word(struct pci_dev *dev, int pos,
833 return pcie_capability_clear_and_set_word(dev, pos, 0, set);
836 static inline int pcie_capability_set_dword(struct pci_dev *dev, int pos,
839 return pcie_capability_clear_and_set_dword(dev, pos, 0, set);
842 static inline int pcie_capability_clear_word(struct pci_dev *dev, int pos,
845 return pcie_capability_clear_and_set_word(dev, pos, clear, 0);
848 static inline int pcie_capability_clear_dword(struct pci_dev *dev, int pos,
851 return pcie_capability_clear_and_set_dword(dev, pos, clear, 0);
854 /* user-space driven config access */
855 int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val);
856 int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val);
857 int pci_user_read_config_dword(struct pci_dev *dev, int where, u32 *val);
858 int pci_user_write_config_byte(struct pci_dev *dev, int where, u8 val);
859 int pci_user_write_config_word(struct pci_dev *dev, int where, u16 val);
860 int pci_user_write_config_dword(struct pci_dev *dev, int where, u32 val);
862 int __must_check pci_enable_device(struct pci_dev *dev);
863 int __must_check pci_enable_device_io(struct pci_dev *dev);
864 int __must_check pci_enable_device_mem(struct pci_dev *dev);
865 int __must_check pci_reenable_device(struct pci_dev *);
866 int __must_check pcim_enable_device(struct pci_dev *pdev);
867 void pcim_pin_device(struct pci_dev *pdev);
869 static inline int pci_is_enabled(struct pci_dev *pdev)
871 return (atomic_read(&pdev->enable_cnt) > 0);
874 static inline int pci_is_managed(struct pci_dev *pdev)
876 return pdev->is_managed;
879 void pci_disable_device(struct pci_dev *dev);
881 extern unsigned int pcibios_max_latency;
882 void pci_set_master(struct pci_dev *dev);
883 void pci_clear_master(struct pci_dev *dev);
885 int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
886 int pci_set_cacheline_size(struct pci_dev *dev);
887 #define HAVE_PCI_SET_MWI
888 int __must_check pci_set_mwi(struct pci_dev *dev);
889 int pci_try_set_mwi(struct pci_dev *dev);
890 void pci_clear_mwi(struct pci_dev *dev);
891 void pci_intx(struct pci_dev *dev, int enable);
892 bool pci_intx_mask_supported(struct pci_dev *dev);
893 bool pci_check_and_mask_intx(struct pci_dev *dev);
894 bool pci_check_and_unmask_intx(struct pci_dev *dev);
895 void pci_msi_off(struct pci_dev *dev);
896 int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size);
897 int pci_set_dma_seg_boundary(struct pci_dev *dev, unsigned long mask);
898 int pcix_get_max_mmrbc(struct pci_dev *dev);
899 int pcix_get_mmrbc(struct pci_dev *dev);
900 int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
901 int pcie_get_readrq(struct pci_dev *dev);
902 int pcie_set_readrq(struct pci_dev *dev, int rq);
903 int pcie_get_mps(struct pci_dev *dev);
904 int pcie_set_mps(struct pci_dev *dev, int mps);
905 int __pci_reset_function(struct pci_dev *dev);
906 int __pci_reset_function_locked(struct pci_dev *dev);
907 int pci_reset_function(struct pci_dev *dev);
908 void pci_update_resource(struct pci_dev *dev, int resno);
909 int __must_check pci_assign_resource(struct pci_dev *dev, int i);
910 int __must_check pci_reassign_resource(struct pci_dev *dev, int i, resource_size_t add_size, resource_size_t align);
911 int pci_select_bars(struct pci_dev *dev, unsigned long flags);
913 /* ROM control related routines */
914 int pci_enable_rom(struct pci_dev *pdev);
915 void pci_disable_rom(struct pci_dev *pdev);
916 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
917 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
918 size_t pci_get_rom_size(struct pci_dev *pdev, void __iomem *rom, size_t size);
920 /* Power management related routines */
921 int pci_save_state(struct pci_dev *dev);
922 void pci_restore_state(struct pci_dev *dev);
923 struct pci_saved_state *pci_store_saved_state(struct pci_dev *dev);
924 int pci_load_saved_state(struct pci_dev *dev, struct pci_saved_state *state);
925 int pci_load_and_free_saved_state(struct pci_dev *dev,
926 struct pci_saved_state **state);
927 int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state);
928 int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
929 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
930 bool pci_pme_capable(struct pci_dev *dev, pci_power_t state);
931 void pci_pme_active(struct pci_dev *dev, bool enable);
932 int __pci_enable_wake(struct pci_dev *dev, pci_power_t state,
933 bool runtime, bool enable);
934 int pci_wake_from_d3(struct pci_dev *dev, bool enable);
935 pci_power_t pci_target_state(struct pci_dev *dev);
936 int pci_prepare_to_sleep(struct pci_dev *dev);
937 int pci_back_from_sleep(struct pci_dev *dev);
938 bool pci_dev_run_wake(struct pci_dev *dev);
939 bool pci_check_pme_status(struct pci_dev *dev);
940 void pci_pme_wakeup_bus(struct pci_bus *bus);
942 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
945 return __pci_enable_wake(dev, state, false, enable);
948 #define PCI_EXP_IDO_REQUEST (1<<0)
949 #define PCI_EXP_IDO_COMPLETION (1<<1)
950 void pci_enable_ido(struct pci_dev *dev, unsigned long type);
951 void pci_disable_ido(struct pci_dev *dev, unsigned long type);
953 enum pci_obff_signal_type {
954 PCI_EXP_OBFF_SIGNAL_L0 = 0,
955 PCI_EXP_OBFF_SIGNAL_ALWAYS = 1,
957 int pci_enable_obff(struct pci_dev *dev, enum pci_obff_signal_type);
958 void pci_disable_obff(struct pci_dev *dev);
960 int pci_enable_ltr(struct pci_dev *dev);
961 void pci_disable_ltr(struct pci_dev *dev);
962 int pci_set_ltr(struct pci_dev *dev, int snoop_lat_ns, int nosnoop_lat_ns);
964 /* For use by arch with custom probe code */
965 void set_pcie_port_type(struct pci_dev *pdev);
966 void set_pcie_hotplug_bridge(struct pci_dev *pdev);
968 /* Functions for PCI Hotplug drivers to use */
969 int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
970 unsigned int pci_rescan_bus_bridge_resize(struct pci_dev *bridge);
971 unsigned int pci_rescan_bus(struct pci_bus *bus);
973 /* Vital product data routines */
974 ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
975 ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
976 int pci_vpd_truncate(struct pci_dev *dev, size_t size);
978 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
979 resource_size_t pcibios_retrieve_fw_addr(struct pci_dev *dev, int idx);
980 void pci_bus_assign_resources(const struct pci_bus *bus);
981 void pci_bus_size_bridges(struct pci_bus *bus);
982 int pci_claim_resource(struct pci_dev *, int);
983 void pci_assign_unassigned_resources(void);
984 void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge);
985 void pci_assign_unassigned_bus_resources(struct pci_bus *bus);
986 void pdev_enable_device(struct pci_dev *);
987 int pci_enable_resources(struct pci_dev *, int mask);
988 void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
989 int (*)(const struct pci_dev *, u8, u8));
990 #define HAVE_PCI_REQ_REGIONS 2
991 int __must_check pci_request_regions(struct pci_dev *, const char *);
992 int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *);
993 void pci_release_regions(struct pci_dev *);
994 int __must_check pci_request_region(struct pci_dev *, int, const char *);
995 int __must_check pci_request_region_exclusive(struct pci_dev *, int, const char *);
996 void pci_release_region(struct pci_dev *, int);
997 int pci_request_selected_regions(struct pci_dev *, int, const char *);
998 int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *);
999 void pci_release_selected_regions(struct pci_dev *, int);
1001 /* drivers/pci/bus.c */
1002 void pci_add_resource(struct list_head *resources, struct resource *res);
1003 void pci_add_resource_offset(struct list_head *resources, struct resource *res,
1004 resource_size_t offset);
1005 void pci_free_resource_list(struct list_head *resources);
1006 void pci_bus_add_resource(struct pci_bus *bus, struct resource *res, unsigned int flags);
1007 struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n);
1008 void pci_bus_remove_resources(struct pci_bus *bus);
1010 #define pci_bus_for_each_resource(bus, res, i) \
1012 (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \
1015 int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
1016 struct resource *res, resource_size_t size,
1017 resource_size_t align, resource_size_t min,
1018 unsigned int type_mask,
1019 resource_size_t (*alignf)(void *,
1020 const struct resource *,
1024 void pci_enable_bridges(struct pci_bus *bus);
1026 /* Proper probing supporting hot-pluggable devices */
1027 int __must_check __pci_register_driver(struct pci_driver *, struct module *,
1028 const char *mod_name);
1031 * pci_register_driver must be a macro so that KBUILD_MODNAME can be expanded
1033 #define pci_register_driver(driver) \
1034 __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
1036 void pci_unregister_driver(struct pci_driver *dev);
1039 * module_pci_driver() - Helper macro for registering a PCI driver
1040 * @__pci_driver: pci_driver struct
1042 * Helper macro for PCI drivers which do not do anything special in module
1043 * init/exit. This eliminates a lot of boilerplate. Each module may only
1044 * use this macro once, and calling it replaces module_init() and module_exit()
1046 #define module_pci_driver(__pci_driver) \
1047 module_driver(__pci_driver, pci_register_driver, \
1048 pci_unregister_driver)
1050 struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
1051 int pci_add_dynid(struct pci_driver *drv,
1052 unsigned int vendor, unsigned int device,
1053 unsigned int subvendor, unsigned int subdevice,
1054 unsigned int class, unsigned int class_mask,
1055 unsigned long driver_data);
1056 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
1057 struct pci_dev *dev);
1058 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
1061 void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
1063 int pci_cfg_space_size_ext(struct pci_dev *dev);
1064 int pci_cfg_space_size(struct pci_dev *dev);
1065 unsigned char pci_bus_max_busnr(struct pci_bus *bus);
1066 void pci_setup_bridge(struct pci_bus *bus);
1067 resource_size_t pcibios_window_alignment(struct pci_bus *bus,
1068 unsigned long type);
1070 #define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0)
1071 #define PCI_VGA_STATE_CHANGE_DECODES (1 << 1)
1073 int pci_set_vga_state(struct pci_dev *pdev, bool decode,
1074 unsigned int command_bits, u32 flags);
1075 /* kmem_cache style wrapper around pci_alloc_consistent() */
1077 #include <linux/pci-dma.h>
1078 #include <linux/dmapool.h>
1080 #define pci_pool dma_pool
1081 #define pci_pool_create(name, pdev, size, align, allocation) \
1082 dma_pool_create(name, &pdev->dev, size, align, allocation)
1083 #define pci_pool_destroy(pool) dma_pool_destroy(pool)
1084 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
1085 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
1087 enum pci_dma_burst_strategy {
1088 PCI_DMA_BURST_INFINITY, /* make bursts as large as possible,
1089 strategy_parameter is N/A */
1090 PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter
1092 PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of
1093 strategy_parameter byte boundaries */
1097 u32 vector; /* kernel uses to write allocated vector */
1098 u16 entry; /* driver uses to specify entry, OS writes */
1102 #ifndef CONFIG_PCI_MSI
1103 static inline int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec)
1109 pci_enable_msi_block_auto(struct pci_dev *dev, unsigned int *maxvec)
1114 static inline void pci_msi_shutdown(struct pci_dev *dev)
1116 static inline void pci_disable_msi(struct pci_dev *dev)
1119 static inline int pci_msix_table_size(struct pci_dev *dev)
1123 static inline int pci_enable_msix(struct pci_dev *dev,
1124 struct msix_entry *entries, int nvec)
1129 static inline void pci_msix_shutdown(struct pci_dev *dev)
1131 static inline void pci_disable_msix(struct pci_dev *dev)
1134 static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev)
1137 static inline void pci_restore_msi_state(struct pci_dev *dev)
1139 static inline int pci_msi_enabled(void)
1144 extern int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec);
1145 extern int pci_enable_msi_block_auto(struct pci_dev *dev, unsigned int *maxvec);
1146 extern void pci_msi_shutdown(struct pci_dev *dev);
1147 extern void pci_disable_msi(struct pci_dev *dev);
1148 extern int pci_msix_table_size(struct pci_dev *dev);
1149 extern int pci_enable_msix(struct pci_dev *dev,
1150 struct msix_entry *entries, int nvec);
1151 extern void pci_msix_shutdown(struct pci_dev *dev);
1152 extern void pci_disable_msix(struct pci_dev *dev);
1153 extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
1154 extern void pci_restore_msi_state(struct pci_dev *dev);
1155 extern int pci_msi_enabled(void);
1158 #ifdef CONFIG_PCIEPORTBUS
1159 extern bool pcie_ports_disabled;
1160 extern bool pcie_ports_auto;
1162 #define pcie_ports_disabled true
1163 #define pcie_ports_auto false
1166 #ifndef CONFIG_PCIEASPM
1167 static inline int pcie_aspm_enabled(void) { return 0; }
1168 static inline bool pcie_aspm_support_enabled(void) { return false; }
1170 extern int pcie_aspm_enabled(void);
1171 extern bool pcie_aspm_support_enabled(void);
1174 #ifdef CONFIG_PCIEAER
1175 void pci_no_aer(void);
1176 bool pci_aer_available(void);
1178 static inline void pci_no_aer(void) { }
1179 static inline bool pci_aer_available(void) { return false; }
1182 #ifndef CONFIG_PCIE_ECRC
1183 static inline void pcie_set_ecrc_checking(struct pci_dev *dev)
1187 static inline void pcie_ecrc_get_policy(char *str) {};
1189 extern void pcie_set_ecrc_checking(struct pci_dev *dev);
1190 extern void pcie_ecrc_get_policy(char *str);
1193 #define pci_enable_msi(pdev) pci_enable_msi_block(pdev, 1)
1195 #ifdef CONFIG_HT_IRQ
1196 /* The functions a driver should call */
1197 int ht_create_irq(struct pci_dev *dev, int idx);
1198 void ht_destroy_irq(unsigned int irq);
1199 #endif /* CONFIG_HT_IRQ */
1201 extern void pci_cfg_access_lock(struct pci_dev *dev);
1202 extern bool pci_cfg_access_trylock(struct pci_dev *dev);
1203 extern void pci_cfg_access_unlock(struct pci_dev *dev);
1206 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
1207 * a PCI domain is defined to be a set of PCI busses which share
1208 * configuration space.
1210 #ifdef CONFIG_PCI_DOMAINS
1211 extern int pci_domains_supported;
1213 enum { pci_domains_supported = 0 };
1214 static inline int pci_domain_nr(struct pci_bus *bus)
1219 static inline int pci_proc_domain(struct pci_bus *bus)
1223 #endif /* CONFIG_PCI_DOMAINS */
1225 /* some architectures require additional setup to direct VGA traffic */
1226 typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode,
1227 unsigned int command_bits, u32 flags);
1228 extern void pci_register_set_vga_state(arch_set_vga_state_t func);
1230 #else /* CONFIG_PCI is not enabled */
1233 * If the system does not have PCI, clearly these return errors. Define
1234 * these as simple inline functions to avoid hair in drivers.
1237 #define _PCI_NOP(o, s, t) \
1238 static inline int pci_##o##_config_##s(struct pci_dev *dev, \
1240 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
1242 #define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
1243 _PCI_NOP(o, word, u16 x) \
1244 _PCI_NOP(o, dword, u32 x)
1245 _PCI_NOP_ALL(read, *)
1246 _PCI_NOP_ALL(write,)
1248 static inline struct pci_dev *pci_get_device(unsigned int vendor,
1249 unsigned int device,
1250 struct pci_dev *from)
1255 static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
1256 unsigned int device,
1257 unsigned int ss_vendor,
1258 unsigned int ss_device,
1259 struct pci_dev *from)
1264 static inline struct pci_dev *pci_get_class(unsigned int class,
1265 struct pci_dev *from)
1270 #define pci_dev_present(ids) (0)
1271 #define no_pci_devices() (1)
1272 #define pci_dev_put(dev) do { } while (0)
1274 static inline void pci_set_master(struct pci_dev *dev)
1277 static inline int pci_enable_device(struct pci_dev *dev)
1282 static inline void pci_disable_device(struct pci_dev *dev)
1285 static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask)
1290 static inline int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
1295 static inline int pci_set_dma_max_seg_size(struct pci_dev *dev,
1301 static inline int pci_set_dma_seg_boundary(struct pci_dev *dev,
1307 static inline int pci_assign_resource(struct pci_dev *dev, int i)
1312 static inline int __pci_register_driver(struct pci_driver *drv,
1313 struct module *owner)
1318 static inline int pci_register_driver(struct pci_driver *drv)
1323 static inline void pci_unregister_driver(struct pci_driver *drv)
1326 static inline int pci_find_capability(struct pci_dev *dev, int cap)
1331 static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
1337 static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
1342 /* Power management related routines */
1343 static inline int pci_save_state(struct pci_dev *dev)
1348 static inline void pci_restore_state(struct pci_dev *dev)
1351 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
1356 static inline int pci_wake_from_d3(struct pci_dev *dev, bool enable)
1361 static inline pci_power_t pci_choose_state(struct pci_dev *dev,
1367 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
1373 static inline void pci_enable_ido(struct pci_dev *dev, unsigned long type)
1377 static inline void pci_disable_ido(struct pci_dev *dev, unsigned long type)
1381 static inline int pci_enable_obff(struct pci_dev *dev, unsigned long type)
1386 static inline void pci_disable_obff(struct pci_dev *dev)
1390 static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
1395 static inline void pci_release_regions(struct pci_dev *dev)
1398 #define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)
1400 static inline void pci_block_cfg_access(struct pci_dev *dev)
1403 static inline int pci_block_cfg_access_in_atomic(struct pci_dev *dev)
1406 static inline void pci_unblock_cfg_access(struct pci_dev *dev)
1409 static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
1412 static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
1416 static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
1420 static inline int pci_domain_nr(struct pci_bus *bus)
1423 static inline struct pci_dev *pci_dev_get(struct pci_dev *dev)
1426 #define dev_is_pci(d) (false)
1427 #define dev_is_pf(d) (false)
1428 #define dev_num_vf(d) (0)
1429 #endif /* CONFIG_PCI */
1431 /* Include architecture-dependent settings and functions */
1433 #include <asm/pci.h>
1435 #ifndef PCIBIOS_MAX_MEM_32
1436 #define PCIBIOS_MAX_MEM_32 (-1)
1439 /* these helpers provide future and backwards compatibility
1440 * for accessing popular PCI BAR info */
1441 #define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
1442 #define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end)
1443 #define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags)
1444 #define pci_resource_len(dev,bar) \
1445 ((pci_resource_start((dev), (bar)) == 0 && \
1446 pci_resource_end((dev), (bar)) == \
1447 pci_resource_start((dev), (bar))) ? 0 : \
1449 (pci_resource_end((dev), (bar)) - \
1450 pci_resource_start((dev), (bar)) + 1))
1452 /* Similar to the helpers above, these manipulate per-pci_dev
1453 * driver-specific data. They are really just a wrapper around
1454 * the generic device structure functions of these calls.
1456 static inline void *pci_get_drvdata(struct pci_dev *pdev)
1458 return dev_get_drvdata(&pdev->dev);
1461 static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
1463 dev_set_drvdata(&pdev->dev, data);
1466 /* If you want to know what to call your pci_dev, ask this function.
1467 * Again, it's a wrapper around the generic device.
1469 static inline const char *pci_name(const struct pci_dev *pdev)
1471 return dev_name(&pdev->dev);
1475 /* Some archs don't want to expose struct resource to userland as-is
1476 * in sysfs and /proc
1478 #ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER
1479 static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
1480 const struct resource *rsrc, resource_size_t *start,
1481 resource_size_t *end)
1483 *start = rsrc->start;
1486 #endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
1490 * The world is not perfect and supplies us with broken PCI devices.
1491 * For at least a part of these bugs we need a work-around, so both
1492 * generic (drivers/pci/quirks.c) and per-architecture code can define
1493 * fixup hooks to be called for particular buggy devices.
1497 u16 vendor; /* You can use PCI_ANY_ID here of course */
1498 u16 device; /* You can use PCI_ANY_ID here of course */
1499 u32 class; /* You can use PCI_ANY_ID here too */
1500 unsigned int class_shift; /* should be 0, 8, 16 */
1501 void (*hook)(struct pci_dev *dev);
1504 enum pci_fixup_pass {
1505 pci_fixup_early, /* Before probing BARs */
1506 pci_fixup_header, /* After reading configuration header */
1507 pci_fixup_final, /* Final phase of device fixups */
1508 pci_fixup_enable, /* pci_enable_device() time */
1509 pci_fixup_resume, /* pci_device_resume() */
1510 pci_fixup_suspend, /* pci_device_suspend */
1511 pci_fixup_resume_early, /* pci_device_resume_early() */
1514 /* Anonymous variables would be nice... */
1515 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, class, \
1516 class_shift, hook) \
1517 static const struct pci_fixup __pci_fixup_##name __used \
1518 __attribute__((__section__(#section), aligned((sizeof(void *))))) \
1519 = { vendor, device, class, class_shift, hook };
1521 #define DECLARE_PCI_FIXUP_CLASS_EARLY(vendor, device, class, \
1522 class_shift, hook) \
1523 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1524 vendor##device##hook, vendor, device, class, class_shift, hook)
1525 #define DECLARE_PCI_FIXUP_CLASS_HEADER(vendor, device, class, \
1526 class_shift, hook) \
1527 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1528 vendor##device##hook, vendor, device, class, class_shift, hook)
1529 #define DECLARE_PCI_FIXUP_CLASS_FINAL(vendor, device, class, \
1530 class_shift, hook) \
1531 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1532 vendor##device##hook, vendor, device, class, class_shift, hook)
1533 #define DECLARE_PCI_FIXUP_CLASS_ENABLE(vendor, device, class, \
1534 class_shift, hook) \
1535 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1536 vendor##device##hook, vendor, device, class, class_shift, hook)
1537 #define DECLARE_PCI_FIXUP_CLASS_RESUME(vendor, device, class, \
1538 class_shift, hook) \
1539 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1540 resume##vendor##device##hook, vendor, device, class, \
1542 #define DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(vendor, device, class, \
1543 class_shift, hook) \
1544 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
1545 resume_early##vendor##device##hook, vendor, device, \
1546 class, class_shift, hook)
1547 #define DECLARE_PCI_FIXUP_CLASS_SUSPEND(vendor, device, class, \
1548 class_shift, hook) \
1549 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
1550 suspend##vendor##device##hook, vendor, device, class, \
1553 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
1554 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1555 vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook)
1556 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
1557 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1558 vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook)
1559 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
1560 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1561 vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook)
1562 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
1563 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1564 vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook)
1565 #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
1566 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1567 resume##vendor##device##hook, vendor, device, \
1568 PCI_ANY_ID, 0, hook)
1569 #define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \
1570 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
1571 resume_early##vendor##device##hook, vendor, device, \
1572 PCI_ANY_ID, 0, hook)
1573 #define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \
1574 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
1575 suspend##vendor##device##hook, vendor, device, \
1576 PCI_ANY_ID, 0, hook)
1578 #ifdef CONFIG_PCI_QUIRKS
1579 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
1580 struct pci_dev *pci_get_dma_source(struct pci_dev *dev);
1581 int pci_dev_specific_acs_enabled(struct pci_dev *dev, u16 acs_flags);
1583 static inline void pci_fixup_device(enum pci_fixup_pass pass,
1584 struct pci_dev *dev) {}
1585 static inline struct pci_dev *pci_get_dma_source(struct pci_dev *dev)
1587 return pci_dev_get(dev);
1589 static inline int pci_dev_specific_acs_enabled(struct pci_dev *dev,
1596 void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
1597 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
1598 void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
1599 int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name);
1600 int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
1602 void pcim_iounmap_regions(struct pci_dev *pdev, int mask);
1604 extern int pci_pci_problems;
1605 #define PCIPCI_FAIL 1 /* No PCI PCI DMA */
1606 #define PCIPCI_TRITON 2
1607 #define PCIPCI_NATOMA 4
1608 #define PCIPCI_VIAETBF 8
1609 #define PCIPCI_VSFX 16
1610 #define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
1611 #define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
1613 extern unsigned long pci_cardbus_io_size;
1614 extern unsigned long pci_cardbus_mem_size;
1615 extern u8 pci_dfl_cache_line_size;
1616 extern u8 pci_cache_line_size;
1618 extern unsigned long pci_hotplug_io_size;
1619 extern unsigned long pci_hotplug_mem_size;
1621 /* Architecture specific versions may override these (weak) */
1622 int pcibios_add_platform_entries(struct pci_dev *dev);
1623 void pcibios_disable_device(struct pci_dev *dev);
1624 void pcibios_set_master(struct pci_dev *dev);
1625 int pcibios_set_pcie_reset_state(struct pci_dev *dev,
1626 enum pcie_reset_state state);
1627 int pcibios_add_device(struct pci_dev *dev);
1629 #ifdef CONFIG_PCI_MMCONFIG
1630 extern void __init pci_mmcfg_early_init(void);
1631 extern void __init pci_mmcfg_late_init(void);
1633 static inline void pci_mmcfg_early_init(void) { }
1634 static inline void pci_mmcfg_late_init(void) { }
1637 int pci_ext_cfg_avail(void);
1639 void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
1641 #ifdef CONFIG_PCI_IOV
1642 extern int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
1643 extern void pci_disable_sriov(struct pci_dev *dev);
1644 extern irqreturn_t pci_sriov_migration(struct pci_dev *dev);
1645 extern int pci_num_vf(struct pci_dev *dev);
1646 extern int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs);
1647 extern int pci_sriov_get_totalvfs(struct pci_dev *dev);
1649 static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
1653 static inline void pci_disable_sriov(struct pci_dev *dev)
1656 static inline irqreturn_t pci_sriov_migration(struct pci_dev *dev)
1660 static inline int pci_num_vf(struct pci_dev *dev)
1664 static inline int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs)
1668 static inline int pci_sriov_get_totalvfs(struct pci_dev *dev)
1674 #if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE)
1675 extern void pci_hp_create_module_link(struct pci_slot *pci_slot);
1676 extern void pci_hp_remove_module_link(struct pci_slot *pci_slot);
1680 * pci_pcie_cap - get the saved PCIe capability offset
1683 * PCIe capability offset is calculated at PCI device initialization
1684 * time and saved in the data structure. This function returns saved
1685 * PCIe capability offset. Using this instead of pci_find_capability()
1686 * reduces unnecessary search in the PCI configuration space. If you
1687 * need to calculate PCIe capability offset from raw device for some
1688 * reasons, please use pci_find_capability() instead.
1690 static inline int pci_pcie_cap(struct pci_dev *dev)
1692 return dev->pcie_cap;
1696 * pci_is_pcie - check if the PCI device is PCI Express capable
1699 * Retrun true if the PCI device is PCI Express capable, false otherwise.
1701 static inline bool pci_is_pcie(struct pci_dev *dev)
1703 return !!pci_pcie_cap(dev);
1707 * pcie_caps_reg - get the PCIe Capabilities Register
1710 static inline u16 pcie_caps_reg(const struct pci_dev *dev)
1712 return dev->pcie_flags_reg;
1716 * pci_pcie_type - get the PCIe device/port type
1719 static inline int pci_pcie_type(const struct pci_dev *dev)
1721 return (pcie_caps_reg(dev) & PCI_EXP_FLAGS_TYPE) >> 4;
1724 void pci_request_acs(void);
1725 bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags);
1726 bool pci_acs_path_enabled(struct pci_dev *start,
1727 struct pci_dev *end, u16 acs_flags);
1729 #define PCI_VPD_LRDT 0x80 /* Large Resource Data Type */
1730 #define PCI_VPD_LRDT_ID(x) (x | PCI_VPD_LRDT)
1732 /* Large Resource Data Type Tag Item Names */
1733 #define PCI_VPD_LTIN_ID_STRING 0x02 /* Identifier String */
1734 #define PCI_VPD_LTIN_RO_DATA 0x10 /* Read-Only Data */
1735 #define PCI_VPD_LTIN_RW_DATA 0x11 /* Read-Write Data */
1737 #define PCI_VPD_LRDT_ID_STRING PCI_VPD_LRDT_ID(PCI_VPD_LTIN_ID_STRING)
1738 #define PCI_VPD_LRDT_RO_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RO_DATA)
1739 #define PCI_VPD_LRDT_RW_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RW_DATA)
1741 /* Small Resource Data Type Tag Item Names */
1742 #define PCI_VPD_STIN_END 0x78 /* End */
1744 #define PCI_VPD_SRDT_END PCI_VPD_STIN_END
1746 #define PCI_VPD_SRDT_TIN_MASK 0x78
1747 #define PCI_VPD_SRDT_LEN_MASK 0x07
1749 #define PCI_VPD_LRDT_TAG_SIZE 3
1750 #define PCI_VPD_SRDT_TAG_SIZE 1
1752 #define PCI_VPD_INFO_FLD_HDR_SIZE 3
1754 #define PCI_VPD_RO_KEYWORD_PARTNO "PN"
1755 #define PCI_VPD_RO_KEYWORD_MFR_ID "MN"
1756 #define PCI_VPD_RO_KEYWORD_VENDOR0 "V0"
1757 #define PCI_VPD_RO_KEYWORD_CHKSUM "RV"
1760 * pci_vpd_lrdt_size - Extracts the Large Resource Data Type length
1761 * @lrdt: Pointer to the beginning of the Large Resource Data Type tag
1763 * Returns the extracted Large Resource Data Type length.
1765 static inline u16 pci_vpd_lrdt_size(const u8 *lrdt)
1767 return (u16)lrdt[1] + ((u16)lrdt[2] << 8);
1771 * pci_vpd_srdt_size - Extracts the Small Resource Data Type length
1772 * @lrdt: Pointer to the beginning of the Small Resource Data Type tag
1774 * Returns the extracted Small Resource Data Type length.
1776 static inline u8 pci_vpd_srdt_size(const u8 *srdt)
1778 return (*srdt) & PCI_VPD_SRDT_LEN_MASK;
1782 * pci_vpd_info_field_size - Extracts the information field length
1783 * @lrdt: Pointer to the beginning of an information field header
1785 * Returns the extracted information field length.
1787 static inline u8 pci_vpd_info_field_size(const u8 *info_field)
1789 return info_field[2];
1793 * pci_vpd_find_tag - Locates the Resource Data Type tag provided
1794 * @buf: Pointer to buffered vpd data
1795 * @off: The offset into the buffer at which to begin the search
1796 * @len: The length of the vpd buffer
1797 * @rdt: The Resource Data Type to search for
1799 * Returns the index where the Resource Data Type was found or
1800 * -ENOENT otherwise.
1802 int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt);
1805 * pci_vpd_find_info_keyword - Locates an information field keyword in the VPD
1806 * @buf: Pointer to buffered vpd data
1807 * @off: The offset into the buffer at which to begin the search
1808 * @len: The length of the buffer area, relative to off, in which to search
1809 * @kw: The keyword to search for
1811 * Returns the index where the information field keyword was found or
1812 * -ENOENT otherwise.
1814 int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off,
1815 unsigned int len, const char *kw);
1817 /* PCI <-> OF binding helpers */
1820 extern void pci_set_of_node(struct pci_dev *dev);
1821 extern void pci_release_of_node(struct pci_dev *dev);
1822 extern void pci_set_bus_of_node(struct pci_bus *bus);
1823 extern void pci_release_bus_of_node(struct pci_bus *bus);
1825 /* Arch may override this (weak) */
1826 extern struct device_node * __weak pcibios_get_phb_of_node(struct pci_bus *bus);
1828 static inline struct device_node *
1829 pci_device_to_OF_node(const struct pci_dev *pdev)
1831 return pdev ? pdev->dev.of_node : NULL;
1834 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
1836 return bus ? bus->dev.of_node : NULL;
1839 #else /* CONFIG_OF */
1840 static inline void pci_set_of_node(struct pci_dev *dev) { }
1841 static inline void pci_release_of_node(struct pci_dev *dev) { }
1842 static inline void pci_set_bus_of_node(struct pci_bus *bus) { }
1843 static inline void pci_release_bus_of_node(struct pci_bus *bus) { }
1844 #endif /* CONFIG_OF */
1847 static inline struct eeh_dev *pci_dev_to_eeh_dev(struct pci_dev *pdev)
1849 return pdev->dev.archdata.edev;
1854 * pci_find_upstream_pcie_bridge - find upstream PCIe-to-PCI bridge of a device
1855 * @pdev: the PCI device
1857 * if the device is PCIE, return NULL
1858 * if the device isn't connected to a PCIe bridge (that is its parent is a
1859 * legacy PCI bridge and the bridge is directly connected to bus 0), return its
1862 struct pci_dev *pci_find_upstream_pcie_bridge(struct pci_dev *pdev);
1864 #endif /* LINUX_PCI_H */