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/resource_ext.h>
33 #include <uapi/linux/pci.h>
35 #include <linux/pci_ids.h>
38 * The PCI interface treats multi-function devices as independent
39 * devices. The slot/function address of each device is encoded
40 * in a single byte as follows:
45 * PCI_DEVFN(), PCI_SLOT(), and PCI_FUNC() are defined in uapi/linux/pci.h.
46 * In the interest of not exposing interfaces to user-space unnecessarily,
47 * the following kernel-only defines are being added here.
49 #define PCI_DEVID(bus, devfn) ((((u16)(bus)) << 8) | (devfn))
50 /* return bus from PCI devid = ((u16)bus_number) << 8) | devfn */
51 #define PCI_BUS_NUM(x) (((x) >> 8) & 0xff)
53 /* pci_slot represents a physical slot */
55 struct pci_bus *bus; /* The bus this slot is on */
56 struct list_head list; /* node in list of slots on this bus */
57 struct hotplug_slot *hotplug; /* Hotplug info (migrate over time) */
58 unsigned char number; /* PCI_SLOT(pci_dev->devfn) */
62 static inline const char *pci_slot_name(const struct pci_slot *slot)
64 return kobject_name(&slot->kobj);
67 /* File state for mmap()s on /proc/bus/pci/X/Y */
73 /* This defines the direction arg to the DMA mapping routines. */
74 #define PCI_DMA_BIDIRECTIONAL 0
75 #define PCI_DMA_TODEVICE 1
76 #define PCI_DMA_FROMDEVICE 2
77 #define PCI_DMA_NONE 3
80 * For PCI devices, the region numbers are assigned this way:
83 /* #0-5: standard PCI resources */
85 PCI_STD_RESOURCE_END = 5,
87 /* #6: expansion ROM resource */
90 /* device specific resources */
93 PCI_IOV_RESOURCE_END = PCI_IOV_RESOURCES + PCI_SRIOV_NUM_BARS - 1,
96 /* resources assigned to buses behind the bridge */
97 #define PCI_BRIDGE_RESOURCE_NUM 4
100 PCI_BRIDGE_RESOURCE_END = PCI_BRIDGE_RESOURCES +
101 PCI_BRIDGE_RESOURCE_NUM - 1,
103 /* total resources associated with a PCI device */
106 /* preserve this for compatibility */
107 DEVICE_COUNT_RESOURCE = PCI_NUM_RESOURCES,
110 typedef int __bitwise pci_power_t;
112 #define PCI_D0 ((pci_power_t __force) 0)
113 #define PCI_D1 ((pci_power_t __force) 1)
114 #define PCI_D2 ((pci_power_t __force) 2)
115 #define PCI_D3hot ((pci_power_t __force) 3)
116 #define PCI_D3cold ((pci_power_t __force) 4)
117 #define PCI_UNKNOWN ((pci_power_t __force) 5)
118 #define PCI_POWER_ERROR ((pci_power_t __force) -1)
120 /* Remember to update this when the list above changes! */
121 extern const char *pci_power_names[];
123 static inline const char *pci_power_name(pci_power_t state)
125 return pci_power_names[1 + (int) state];
128 #define PCI_PM_D2_DELAY 200
129 #define PCI_PM_D3_WAIT 10
130 #define PCI_PM_D3COLD_WAIT 100
131 #define PCI_PM_BUS_WAIT 50
133 /** The pci_channel state describes connectivity between the CPU and
134 * the pci device. If some PCI bus between here and the pci device
135 * has crashed or locked up, this info is reflected here.
137 typedef unsigned int __bitwise pci_channel_state_t;
139 enum pci_channel_state {
140 /* I/O channel is in normal state */
141 pci_channel_io_normal = (__force pci_channel_state_t) 1,
143 /* I/O to channel is blocked */
144 pci_channel_io_frozen = (__force pci_channel_state_t) 2,
146 /* PCI card is dead */
147 pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
150 typedef unsigned int __bitwise pcie_reset_state_t;
152 enum pcie_reset_state {
153 /* Reset is NOT asserted (Use to deassert reset) */
154 pcie_deassert_reset = (__force pcie_reset_state_t) 1,
156 /* Use #PERST to reset PCIe device */
157 pcie_warm_reset = (__force pcie_reset_state_t) 2,
159 /* Use PCIe Hot Reset to reset device */
160 pcie_hot_reset = (__force pcie_reset_state_t) 3
163 typedef unsigned short __bitwise pci_dev_flags_t;
165 /* INTX_DISABLE in PCI_COMMAND register disables MSI
168 PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG = (__force pci_dev_flags_t) (1 << 0),
169 /* Device configuration is irrevocably lost if disabled into D3 */
170 PCI_DEV_FLAGS_NO_D3 = (__force pci_dev_flags_t) (1 << 1),
171 /* Provide indication device is assigned by a Virtual Machine Manager */
172 PCI_DEV_FLAGS_ASSIGNED = (__force pci_dev_flags_t) (1 << 2),
173 /* Flag for quirk use to store if quirk-specific ACS is enabled */
174 PCI_DEV_FLAGS_ACS_ENABLED_QUIRK = (__force pci_dev_flags_t) (1 << 3),
175 /* Flag to indicate the device uses dma_alias_devfn */
176 PCI_DEV_FLAGS_DMA_ALIAS_DEVFN = (__force pci_dev_flags_t) (1 << 4),
177 /* Use a PCIe-to-PCI bridge alias even if !pci_is_pcie */
178 PCI_DEV_FLAG_PCIE_BRIDGE_ALIAS = (__force pci_dev_flags_t) (1 << 5),
179 /* Do not use bus resets for device */
180 PCI_DEV_FLAGS_NO_BUS_RESET = (__force pci_dev_flags_t) (1 << 6),
181 /* Do not use PM reset even if device advertises NoSoftRst- */
182 PCI_DEV_FLAGS_NO_PM_RESET = (__force pci_dev_flags_t) (1 << 7),
185 enum pci_irq_reroute_variant {
186 INTEL_IRQ_REROUTE_VARIANT = 1,
187 MAX_IRQ_REROUTE_VARIANTS = 3
190 typedef unsigned short __bitwise pci_bus_flags_t;
192 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
193 PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2,
196 /* These values come from the PCI Express Spec */
197 enum pcie_link_width {
198 PCIE_LNK_WIDTH_RESRV = 0x00,
206 PCIE_LNK_WIDTH_UNKNOWN = 0xFF,
209 /* Based on the PCI Hotplug Spec, but some values are made up by us */
211 PCI_SPEED_33MHz = 0x00,
212 PCI_SPEED_66MHz = 0x01,
213 PCI_SPEED_66MHz_PCIX = 0x02,
214 PCI_SPEED_100MHz_PCIX = 0x03,
215 PCI_SPEED_133MHz_PCIX = 0x04,
216 PCI_SPEED_66MHz_PCIX_ECC = 0x05,
217 PCI_SPEED_100MHz_PCIX_ECC = 0x06,
218 PCI_SPEED_133MHz_PCIX_ECC = 0x07,
219 PCI_SPEED_66MHz_PCIX_266 = 0x09,
220 PCI_SPEED_100MHz_PCIX_266 = 0x0a,
221 PCI_SPEED_133MHz_PCIX_266 = 0x0b,
227 PCI_SPEED_66MHz_PCIX_533 = 0x11,
228 PCI_SPEED_100MHz_PCIX_533 = 0x12,
229 PCI_SPEED_133MHz_PCIX_533 = 0x13,
230 PCIE_SPEED_2_5GT = 0x14,
231 PCIE_SPEED_5_0GT = 0x15,
232 PCIE_SPEED_8_0GT = 0x16,
233 PCI_SPEED_UNKNOWN = 0xff,
236 struct pci_cap_saved_data {
243 struct pci_cap_saved_state {
244 struct hlist_node next;
245 struct pci_cap_saved_data cap;
248 struct pcie_link_state;
254 * The pci_dev structure is used to describe PCI devices.
257 struct list_head bus_list; /* node in per-bus list */
258 struct pci_bus *bus; /* bus this device is on */
259 struct pci_bus *subordinate; /* bus this device bridges to */
261 void *sysdata; /* hook for sys-specific extension */
262 struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */
263 struct pci_slot *slot; /* Physical slot this device is in */
265 unsigned int devfn; /* encoded device & function index */
266 unsigned short vendor;
267 unsigned short device;
268 unsigned short subsystem_vendor;
269 unsigned short subsystem_device;
270 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
271 u8 revision; /* PCI revision, low byte of class word */
272 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
273 u8 pcie_cap; /* PCIe capability offset */
274 u8 msi_cap; /* MSI capability offset */
275 u8 msix_cap; /* MSI-X capability offset */
276 u8 pcie_mpss:3; /* PCIe Max Payload Size Supported */
277 u8 rom_base_reg; /* which config register controls the ROM */
278 u8 pin; /* which interrupt pin this device uses */
279 u16 pcie_flags_reg; /* cached PCIe Capabilities Register */
280 u8 dma_alias_devfn;/* devfn of DMA alias, if any */
282 struct pci_driver *driver; /* which driver has allocated this device */
283 u64 dma_mask; /* Mask of the bits of bus address this
284 device implements. Normally this is
285 0xffffffff. You only need to change
286 this if your device has broken DMA
287 or supports 64-bit transfers. */
289 struct device_dma_parameters dma_parms;
291 pci_power_t current_state; /* Current operating state. In ACPI-speak,
292 this is D0-D3, D0 being fully functional,
294 u8 pm_cap; /* PM capability offset */
295 unsigned int pme_support:5; /* Bitmask of states from which PME#
297 unsigned int pme_interrupt:1;
298 unsigned int pme_poll:1; /* Poll device's PME status bit */
299 unsigned int d1_support:1; /* Low power state D1 is supported */
300 unsigned int d2_support:1; /* Low power state D2 is supported */
301 unsigned int no_d1d2:1; /* D1 and D2 are forbidden */
302 unsigned int no_d3cold:1; /* D3cold is forbidden */
303 unsigned int d3cold_allowed:1; /* D3cold is allowed by user */
304 unsigned int mmio_always_on:1; /* disallow turning off io/mem
305 decoding during bar sizing */
306 unsigned int wakeup_prepared:1;
307 unsigned int runtime_d3cold:1; /* whether go through runtime
308 D3cold, not set for devices
309 powered on/off by the
310 corresponding bridge */
311 unsigned int ignore_hotplug:1; /* Ignore hotplug events */
312 unsigned int d3_delay; /* D3->D0 transition time in ms */
313 unsigned int d3cold_delay; /* D3cold->D0 transition time in ms */
315 #ifdef CONFIG_PCIEASPM
316 struct pcie_link_state *link_state; /* ASPM link state */
319 pci_channel_state_t error_state; /* current connectivity state */
320 struct device dev; /* Generic device interface */
322 int cfg_size; /* Size of configuration space */
325 * Instead of touching interrupt line and base address registers
326 * directly, use the values stored here. They might be different!
329 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
331 bool match_driver; /* Skip attaching driver */
332 /* These fields are used by common fixups */
333 unsigned int transparent:1; /* Subtractive decode PCI bridge */
334 unsigned int multifunction:1;/* Part of multi-function device */
335 /* keep track of device state */
336 unsigned int is_added:1;
337 unsigned int is_busmaster:1; /* device is busmaster */
338 unsigned int no_msi:1; /* device may not use msi */
339 unsigned int no_64bit_msi:1; /* device may only use 32-bit MSIs */
340 unsigned int block_cfg_access:1; /* config space access is blocked */
341 unsigned int broken_parity_status:1; /* Device generates false positive parity */
342 unsigned int irq_reroute_variant:2; /* device needs IRQ rerouting variant */
343 unsigned int msi_enabled:1;
344 unsigned int msix_enabled:1;
345 unsigned int ari_enabled:1; /* ARI forwarding */
346 unsigned int is_managed:1;
347 unsigned int needs_freset:1; /* Dev requires fundamental reset */
348 unsigned int state_saved:1;
349 unsigned int is_physfn:1;
350 unsigned int is_virtfn:1;
351 unsigned int reset_fn:1;
352 unsigned int is_hotplug_bridge:1;
353 unsigned int __aer_firmware_first_valid:1;
354 unsigned int __aer_firmware_first:1;
355 unsigned int broken_intx_masking:1;
356 unsigned int io_window_1k:1; /* Intel P2P bridge 1K I/O windows */
357 unsigned int irq_managed:1;
358 pci_dev_flags_t dev_flags;
359 atomic_t enable_cnt; /* pci_enable_device has been called */
361 u32 saved_config_space[16]; /* config space saved at suspend time */
362 struct hlist_head saved_cap_space;
363 struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
364 int rom_attr_enabled; /* has display of the rom attribute been enabled? */
365 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
366 struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
367 #ifdef CONFIG_PCI_MSI
368 struct list_head msi_list;
369 const struct attribute_group **msi_irq_groups;
372 #ifdef CONFIG_PCI_ATS
374 struct pci_sriov *sriov; /* SR-IOV capability related */
375 struct pci_dev *physfn; /* the PF this VF is associated with */
377 struct pci_ats *ats; /* Address Translation Service */
379 phys_addr_t rom; /* Physical address of ROM if it's not from the BAR */
380 size_t romlen; /* Length of ROM if it's not from the BAR */
381 char *driver_override; /* Driver name to force a match */
384 static inline struct pci_dev *pci_physfn(struct pci_dev *dev)
386 #ifdef CONFIG_PCI_IOV
393 struct pci_dev *pci_alloc_dev(struct pci_bus *bus);
395 #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
396 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
398 static inline int pci_channel_offline(struct pci_dev *pdev)
400 return (pdev->error_state != pci_channel_io_normal);
403 struct pci_host_bridge {
405 struct pci_bus *bus; /* root bus */
406 struct list_head windows; /* resource_entry */
407 void (*release_fn)(struct pci_host_bridge *);
411 #define to_pci_host_bridge(n) container_of(n, struct pci_host_bridge, dev)
412 void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
413 void (*release_fn)(struct pci_host_bridge *),
416 int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge);
419 * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond
420 * to P2P or CardBus bridge windows) go in a table. Additional ones (for
421 * buses below host bridges or subtractive decode bridges) go in the list.
422 * Use pci_bus_for_each_resource() to iterate through all the resources.
426 * PCI_SUBTRACTIVE_DECODE means the bridge forwards the window implicitly
427 * and there's no way to program the bridge with the details of the window.
428 * This does not apply to ACPI _CRS windows, even with the _DEC subtractive-
429 * decode bit set, because they are explicit and can be programmed with _SRS.
431 #define PCI_SUBTRACTIVE_DECODE 0x1
433 struct pci_bus_resource {
434 struct list_head list;
435 struct resource *res;
439 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
442 struct list_head node; /* node in list of buses */
443 struct pci_bus *parent; /* parent bus this bridge is on */
444 struct list_head children; /* list of child buses */
445 struct list_head devices; /* list of devices on this bus */
446 struct pci_dev *self; /* bridge device as seen by parent */
447 struct list_head slots; /* list of slots on this bus */
448 struct resource *resource[PCI_BRIDGE_RESOURCE_NUM];
449 struct list_head resources; /* address space routed to this bus */
450 struct resource busn_res; /* bus numbers routed to this bus */
452 struct pci_ops *ops; /* configuration access functions */
453 struct msi_controller *msi; /* MSI controller */
454 void *sysdata; /* hook for sys-specific extension */
455 struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
457 unsigned char number; /* bus number */
458 unsigned char primary; /* number of primary bridge */
459 unsigned char max_bus_speed; /* enum pci_bus_speed */
460 unsigned char cur_bus_speed; /* enum pci_bus_speed */
461 #ifdef CONFIG_PCI_DOMAINS_GENERIC
467 unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */
468 pci_bus_flags_t bus_flags; /* inherited by child buses */
469 struct device *bridge;
471 struct bin_attribute *legacy_io; /* legacy I/O for this bus */
472 struct bin_attribute *legacy_mem; /* legacy mem */
473 unsigned int is_added:1;
476 #define to_pci_bus(n) container_of(n, struct pci_bus, dev)
479 * Returns true if the PCI bus is root (behind host-PCI bridge),
482 * Some code assumes that "bus->self == NULL" means that bus is a root bus.
483 * This is incorrect because "virtual" buses added for SR-IOV (via
484 * virtfn_add_bus()) have "bus->self == NULL" but are not root buses.
486 static inline bool pci_is_root_bus(struct pci_bus *pbus)
488 return !(pbus->parent);
492 * pci_is_bridge - check if the PCI device is a bridge
495 * Return true if the PCI device is bridge whether it has subordinate
498 static inline bool pci_is_bridge(struct pci_dev *dev)
500 return dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
501 dev->hdr_type == PCI_HEADER_TYPE_CARDBUS;
504 static inline struct pci_dev *pci_upstream_bridge(struct pci_dev *dev)
506 dev = pci_physfn(dev);
507 if (pci_is_root_bus(dev->bus))
510 return dev->bus->self;
513 #ifdef CONFIG_PCI_MSI
514 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev)
516 return pci_dev->msi_enabled || pci_dev->msix_enabled;
519 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false; }
523 * Error values that may be returned by PCI functions.
525 #define PCIBIOS_SUCCESSFUL 0x00
526 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
527 #define PCIBIOS_BAD_VENDOR_ID 0x83
528 #define PCIBIOS_DEVICE_NOT_FOUND 0x86
529 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87
530 #define PCIBIOS_SET_FAILED 0x88
531 #define PCIBIOS_BUFFER_TOO_SMALL 0x89
534 * Translate above to generic errno for passing back through non-PCI code.
536 static inline int pcibios_err_to_errno(int err)
538 if (err <= PCIBIOS_SUCCESSFUL)
539 return err; /* Assume already errno */
542 case PCIBIOS_FUNC_NOT_SUPPORTED:
544 case PCIBIOS_BAD_VENDOR_ID:
546 case PCIBIOS_DEVICE_NOT_FOUND:
548 case PCIBIOS_BAD_REGISTER_NUMBER:
550 case PCIBIOS_SET_FAILED:
552 case PCIBIOS_BUFFER_TOO_SMALL:
559 /* Low-level architecture-dependent routines */
562 void __iomem *(*map_bus)(struct pci_bus *bus, unsigned int devfn, int where);
563 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
564 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
568 * ACPI needs to be able to access PCI config space before we've done a
569 * PCI bus scan and created pci_bus structures.
571 int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn,
572 int reg, int len, u32 *val);
573 int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,
574 int reg, int len, u32 val);
576 struct pci_bus_region {
582 spinlock_t lock; /* protects list, index */
583 struct list_head list; /* for IDs added at runtime */
588 * PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
589 * a set of callbacks in struct pci_error_handlers, that device driver
590 * will be notified of PCI bus errors, and will be driven to recovery
591 * when an error occurs.
594 typedef unsigned int __bitwise pci_ers_result_t;
596 enum pci_ers_result {
597 /* no result/none/not supported in device driver */
598 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
600 /* Device driver can recover without slot reset */
601 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
603 /* Device driver wants slot to be reset. */
604 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
606 /* Device has completely failed, is unrecoverable */
607 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
609 /* Device driver is fully recovered and operational */
610 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
612 /* No AER capabilities registered for the driver */
613 PCI_ERS_RESULT_NO_AER_DRIVER = (__force pci_ers_result_t) 6,
616 /* PCI bus error event callbacks */
617 struct pci_error_handlers {
618 /* PCI bus error detected on this device */
619 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
620 enum pci_channel_state error);
622 /* MMIO has been re-enabled, but not DMA */
623 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
625 /* PCI Express link has been reset */
626 pci_ers_result_t (*link_reset)(struct pci_dev *dev);
628 /* PCI slot has been reset */
629 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
631 /* PCI function reset prepare or completed */
632 void (*reset_notify)(struct pci_dev *dev, bool prepare);
634 /* Device driver may resume normal operations */
635 void (*resume)(struct pci_dev *dev);
641 struct list_head node;
643 const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */
644 int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
645 void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
646 int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */
647 int (*suspend_late) (struct pci_dev *dev, pm_message_t state);
648 int (*resume_early) (struct pci_dev *dev);
649 int (*resume) (struct pci_dev *dev); /* Device woken up */
650 void (*shutdown) (struct pci_dev *dev);
651 int (*sriov_configure) (struct pci_dev *dev, int num_vfs); /* PF pdev */
652 const struct pci_error_handlers *err_handler;
653 struct device_driver driver;
654 struct pci_dynids dynids;
657 #define to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
660 * DEFINE_PCI_DEVICE_TABLE - macro used to describe a pci device table
661 * @_table: device table name
663 * This macro is deprecated and should not be used in new code.
665 #define DEFINE_PCI_DEVICE_TABLE(_table) \
666 const struct pci_device_id _table[]
669 * PCI_DEVICE - macro used to describe a specific pci device
670 * @vend: the 16 bit PCI Vendor ID
671 * @dev: the 16 bit PCI Device ID
673 * This macro is used to create a struct pci_device_id that matches a
674 * specific device. The subvendor and subdevice fields will be set to
677 #define PCI_DEVICE(vend,dev) \
678 .vendor = (vend), .device = (dev), \
679 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
682 * PCI_DEVICE_SUB - macro used to describe a specific pci device with subsystem
683 * @vend: the 16 bit PCI Vendor ID
684 * @dev: the 16 bit PCI Device ID
685 * @subvend: the 16 bit PCI Subvendor ID
686 * @subdev: the 16 bit PCI Subdevice ID
688 * This macro is used to create a struct pci_device_id that matches a
689 * specific device with subsystem information.
691 #define PCI_DEVICE_SUB(vend, dev, subvend, subdev) \
692 .vendor = (vend), .device = (dev), \
693 .subvendor = (subvend), .subdevice = (subdev)
696 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
697 * @dev_class: the class, subclass, prog-if triple for this device
698 * @dev_class_mask: the class mask for this device
700 * This macro is used to create a struct pci_device_id that matches a
701 * specific PCI class. The vendor, device, subvendor, and subdevice
702 * fields will be set to PCI_ANY_ID.
704 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
705 .class = (dev_class), .class_mask = (dev_class_mask), \
706 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
707 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
710 * PCI_VDEVICE - macro used to describe a specific pci device in short form
711 * @vend: the vendor name
712 * @dev: the 16 bit PCI Device ID
714 * This macro is used to create a struct pci_device_id that matches a
715 * specific PCI device. The subvendor, and subdevice fields will be set
716 * to PCI_ANY_ID. The macro allows the next field to follow as the device
720 #define PCI_VDEVICE(vend, dev) \
721 .vendor = PCI_VENDOR_ID_##vend, .device = (dev), \
722 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0
724 /* these external functions are only available when PCI support is enabled */
727 void pcie_bus_configure_settings(struct pci_bus *bus);
729 enum pcie_bus_config_types {
732 PCIE_BUS_PERFORMANCE,
736 extern enum pcie_bus_config_types pcie_bus_config;
738 extern struct bus_type pci_bus_type;
740 /* Do NOT directly access these two variables, unless you are arch-specific PCI
741 * code, or PCI core code. */
742 extern struct list_head pci_root_buses; /* list of all known PCI buses */
743 /* Some device drivers need know if PCI is initiated */
744 int no_pci_devices(void);
746 void pcibios_resource_survey_bus(struct pci_bus *bus);
747 void pcibios_add_bus(struct pci_bus *bus);
748 void pcibios_remove_bus(struct pci_bus *bus);
749 void pcibios_fixup_bus(struct pci_bus *);
750 int __must_check pcibios_enable_device(struct pci_dev *, int mask);
751 /* Architecture-specific versions may override this (weak) */
752 char *pcibios_setup(char *str);
754 /* Used only when drivers/pci/setup.c is used */
755 resource_size_t pcibios_align_resource(void *, const struct resource *,
758 void pcibios_update_irq(struct pci_dev *, int irq);
760 /* Weak but can be overriden by arch */
761 void pci_fixup_cardbus(struct pci_bus *);
763 /* Generic PCI functions used internally */
765 void pcibios_resource_to_bus(struct pci_bus *bus, struct pci_bus_region *region,
766 struct resource *res);
767 void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res,
768 struct pci_bus_region *region);
769 void pcibios_scan_specific_bus(int busn);
770 struct pci_bus *pci_find_bus(int domain, int busnr);
771 void pci_bus_add_devices(const struct pci_bus *bus);
772 struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus,
773 struct pci_ops *ops, void *sysdata);
774 struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata);
775 struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
776 struct pci_ops *ops, void *sysdata,
777 struct list_head *resources);
778 int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax);
779 int pci_bus_update_busn_res_end(struct pci_bus *b, int busmax);
780 void pci_bus_release_busn_res(struct pci_bus *b);
781 struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
782 struct pci_ops *ops, void *sysdata,
783 struct list_head *resources);
784 struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
786 void pcie_update_link_speed(struct pci_bus *bus, u16 link_status);
787 struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
789 struct hotplug_slot *hotplug);
790 void pci_destroy_slot(struct pci_slot *slot);
791 int pci_scan_slot(struct pci_bus *bus, int devfn);
792 struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
793 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
794 unsigned int pci_scan_child_bus(struct pci_bus *bus);
795 void pci_bus_add_device(struct pci_dev *dev);
796 void pci_read_bridge_bases(struct pci_bus *child);
797 struct resource *pci_find_parent_resource(const struct pci_dev *dev,
798 struct resource *res);
799 u8 pci_swizzle_interrupt_pin(const struct pci_dev *dev, u8 pin);
800 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
801 u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp);
802 struct pci_dev *pci_dev_get(struct pci_dev *dev);
803 void pci_dev_put(struct pci_dev *dev);
804 void pci_remove_bus(struct pci_bus *b);
805 void pci_stop_and_remove_bus_device(struct pci_dev *dev);
806 void pci_stop_and_remove_bus_device_locked(struct pci_dev *dev);
807 void pci_stop_root_bus(struct pci_bus *bus);
808 void pci_remove_root_bus(struct pci_bus *bus);
809 void pci_setup_cardbus(struct pci_bus *bus);
810 void pci_sort_breadthfirst(void);
811 #define dev_is_pci(d) ((d)->bus == &pci_bus_type)
812 #define dev_is_pf(d) ((dev_is_pci(d) ? to_pci_dev(d)->is_physfn : false))
813 #define dev_num_vf(d) ((dev_is_pci(d) ? pci_num_vf(to_pci_dev(d)) : 0))
815 /* Generic PCI functions exported to card drivers */
817 enum pci_lost_interrupt_reason {
818 PCI_LOST_IRQ_NO_INFORMATION = 0,
819 PCI_LOST_IRQ_DISABLE_MSI,
820 PCI_LOST_IRQ_DISABLE_MSIX,
821 PCI_LOST_IRQ_DISABLE_ACPI,
823 enum pci_lost_interrupt_reason pci_lost_interrupt(struct pci_dev *dev);
824 int pci_find_capability(struct pci_dev *dev, int cap);
825 int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
826 int pci_find_ext_capability(struct pci_dev *dev, int cap);
827 int pci_find_next_ext_capability(struct pci_dev *dev, int pos, int cap);
828 int pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
829 int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap);
830 struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
832 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
833 struct pci_dev *from);
834 struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
835 unsigned int ss_vendor, unsigned int ss_device,
836 struct pci_dev *from);
837 struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
838 struct pci_dev *pci_get_domain_bus_and_slot(int domain, unsigned int bus,
840 static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
843 return pci_get_domain_bus_and_slot(0, bus, devfn);
845 struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
846 int pci_dev_present(const struct pci_device_id *ids);
848 int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn,
850 int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn,
851 int where, u16 *val);
852 int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn,
853 int where, u32 *val);
854 int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
856 int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn,
858 int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,
861 int pci_generic_config_read(struct pci_bus *bus, unsigned int devfn,
862 int where, int size, u32 *val);
863 int pci_generic_config_write(struct pci_bus *bus, unsigned int devfn,
864 int where, int size, u32 val);
865 int pci_generic_config_read32(struct pci_bus *bus, unsigned int devfn,
866 int where, int size, u32 *val);
867 int pci_generic_config_write32(struct pci_bus *bus, unsigned int devfn,
868 int where, int size, u32 val);
870 struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops);
872 static inline int pci_read_config_byte(const struct pci_dev *dev, int where, u8 *val)
874 return pci_bus_read_config_byte(dev->bus, dev->devfn, where, val);
876 static inline int pci_read_config_word(const struct pci_dev *dev, int where, u16 *val)
878 return pci_bus_read_config_word(dev->bus, dev->devfn, where, val);
880 static inline int pci_read_config_dword(const struct pci_dev *dev, int where,
883 return pci_bus_read_config_dword(dev->bus, dev->devfn, where, val);
885 static inline int pci_write_config_byte(const struct pci_dev *dev, int where, u8 val)
887 return pci_bus_write_config_byte(dev->bus, dev->devfn, where, val);
889 static inline int pci_write_config_word(const struct pci_dev *dev, int where, u16 val)
891 return pci_bus_write_config_word(dev->bus, dev->devfn, where, val);
893 static inline int pci_write_config_dword(const struct pci_dev *dev, int where,
896 return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val);
899 int pcie_capability_read_word(struct pci_dev *dev, int pos, u16 *val);
900 int pcie_capability_read_dword(struct pci_dev *dev, int pos, u32 *val);
901 int pcie_capability_write_word(struct pci_dev *dev, int pos, u16 val);
902 int pcie_capability_write_dword(struct pci_dev *dev, int pos, u32 val);
903 int pcie_capability_clear_and_set_word(struct pci_dev *dev, int pos,
905 int pcie_capability_clear_and_set_dword(struct pci_dev *dev, int pos,
908 static inline int pcie_capability_set_word(struct pci_dev *dev, int pos,
911 return pcie_capability_clear_and_set_word(dev, pos, 0, set);
914 static inline int pcie_capability_set_dword(struct pci_dev *dev, int pos,
917 return pcie_capability_clear_and_set_dword(dev, pos, 0, set);
920 static inline int pcie_capability_clear_word(struct pci_dev *dev, int pos,
923 return pcie_capability_clear_and_set_word(dev, pos, clear, 0);
926 static inline int pcie_capability_clear_dword(struct pci_dev *dev, int pos,
929 return pcie_capability_clear_and_set_dword(dev, pos, clear, 0);
932 /* user-space driven config access */
933 int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val);
934 int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val);
935 int pci_user_read_config_dword(struct pci_dev *dev, int where, u32 *val);
936 int pci_user_write_config_byte(struct pci_dev *dev, int where, u8 val);
937 int pci_user_write_config_word(struct pci_dev *dev, int where, u16 val);
938 int pci_user_write_config_dword(struct pci_dev *dev, int where, u32 val);
940 int __must_check pci_enable_device(struct pci_dev *dev);
941 int __must_check pci_enable_device_io(struct pci_dev *dev);
942 int __must_check pci_enable_device_mem(struct pci_dev *dev);
943 int __must_check pci_reenable_device(struct pci_dev *);
944 int __must_check pcim_enable_device(struct pci_dev *pdev);
945 void pcim_pin_device(struct pci_dev *pdev);
947 static inline int pci_is_enabled(struct pci_dev *pdev)
949 return (atomic_read(&pdev->enable_cnt) > 0);
952 static inline int pci_is_managed(struct pci_dev *pdev)
954 return pdev->is_managed;
957 void pci_disable_device(struct pci_dev *dev);
959 extern unsigned int pcibios_max_latency;
960 void pci_set_master(struct pci_dev *dev);
961 void pci_clear_master(struct pci_dev *dev);
963 int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
964 int pci_set_cacheline_size(struct pci_dev *dev);
965 #define HAVE_PCI_SET_MWI
966 int __must_check pci_set_mwi(struct pci_dev *dev);
967 int pci_try_set_mwi(struct pci_dev *dev);
968 void pci_clear_mwi(struct pci_dev *dev);
969 void pci_intx(struct pci_dev *dev, int enable);
970 bool pci_intx_mask_supported(struct pci_dev *dev);
971 bool pci_check_and_mask_intx(struct pci_dev *dev);
972 bool pci_check_and_unmask_intx(struct pci_dev *dev);
973 void pci_msi_off(struct pci_dev *dev);
974 int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size);
975 int pci_set_dma_seg_boundary(struct pci_dev *dev, unsigned long mask);
976 int pci_wait_for_pending(struct pci_dev *dev, int pos, u16 mask);
977 int pci_wait_for_pending_transaction(struct pci_dev *dev);
978 int pcix_get_max_mmrbc(struct pci_dev *dev);
979 int pcix_get_mmrbc(struct pci_dev *dev);
980 int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
981 int pcie_get_readrq(struct pci_dev *dev);
982 int pcie_set_readrq(struct pci_dev *dev, int rq);
983 int pcie_get_mps(struct pci_dev *dev);
984 int pcie_set_mps(struct pci_dev *dev, int mps);
985 int pcie_get_minimum_link(struct pci_dev *dev, enum pci_bus_speed *speed,
986 enum pcie_link_width *width);
987 int __pci_reset_function(struct pci_dev *dev);
988 int __pci_reset_function_locked(struct pci_dev *dev);
989 int pci_reset_function(struct pci_dev *dev);
990 int pci_try_reset_function(struct pci_dev *dev);
991 int pci_probe_reset_slot(struct pci_slot *slot);
992 int pci_reset_slot(struct pci_slot *slot);
993 int pci_try_reset_slot(struct pci_slot *slot);
994 int pci_probe_reset_bus(struct pci_bus *bus);
995 int pci_reset_bus(struct pci_bus *bus);
996 int pci_try_reset_bus(struct pci_bus *bus);
997 void pci_reset_secondary_bus(struct pci_dev *dev);
998 void pcibios_reset_secondary_bus(struct pci_dev *dev);
999 void pci_reset_bridge_secondary_bus(struct pci_dev *dev);
1000 void pci_update_resource(struct pci_dev *dev, int resno);
1001 int __must_check pci_assign_resource(struct pci_dev *dev, int i);
1002 int __must_check pci_reassign_resource(struct pci_dev *dev, int i, resource_size_t add_size, resource_size_t align);
1003 int pci_select_bars(struct pci_dev *dev, unsigned long flags);
1004 bool pci_device_is_present(struct pci_dev *pdev);
1006 /* ROM control related routines */
1007 int pci_enable_rom(struct pci_dev *pdev);
1008 void pci_disable_rom(struct pci_dev *pdev);
1009 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
1010 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
1011 size_t pci_get_rom_size(struct pci_dev *pdev, void __iomem *rom, size_t size);
1012 void __iomem __must_check *pci_platform_rom(struct pci_dev *pdev, size_t *size);
1014 /* Power management related routines */
1015 int pci_save_state(struct pci_dev *dev);
1016 void pci_restore_state(struct pci_dev *dev);
1017 struct pci_saved_state *pci_store_saved_state(struct pci_dev *dev);
1018 int pci_load_saved_state(struct pci_dev *dev,
1019 struct pci_saved_state *state);
1020 int pci_load_and_free_saved_state(struct pci_dev *dev,
1021 struct pci_saved_state **state);
1022 struct pci_cap_saved_state *pci_find_saved_cap(struct pci_dev *dev, char cap);
1023 struct pci_cap_saved_state *pci_find_saved_ext_cap(struct pci_dev *dev,
1025 int pci_add_cap_save_buffer(struct pci_dev *dev, char cap, unsigned int size);
1026 int pci_add_ext_cap_save_buffer(struct pci_dev *dev,
1027 u16 cap, unsigned int size);
1028 int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state);
1029 int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
1030 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
1031 bool pci_pme_capable(struct pci_dev *dev, pci_power_t state);
1032 void pci_pme_active(struct pci_dev *dev, bool enable);
1033 int __pci_enable_wake(struct pci_dev *dev, pci_power_t state,
1034 bool runtime, bool enable);
1035 int pci_wake_from_d3(struct pci_dev *dev, bool enable);
1036 int pci_prepare_to_sleep(struct pci_dev *dev);
1037 int pci_back_from_sleep(struct pci_dev *dev);
1038 bool pci_dev_run_wake(struct pci_dev *dev);
1039 bool pci_check_pme_status(struct pci_dev *dev);
1040 void pci_pme_wakeup_bus(struct pci_bus *bus);
1042 static inline void pci_ignore_hotplug(struct pci_dev *dev)
1044 dev->ignore_hotplug = 1;
1047 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
1050 return __pci_enable_wake(dev, state, false, enable);
1053 /* PCI Virtual Channel */
1054 int pci_save_vc_state(struct pci_dev *dev);
1055 void pci_restore_vc_state(struct pci_dev *dev);
1056 void pci_allocate_vc_save_buffers(struct pci_dev *dev);
1058 /* For use by arch with custom probe code */
1059 void set_pcie_port_type(struct pci_dev *pdev);
1060 void set_pcie_hotplug_bridge(struct pci_dev *pdev);
1062 /* Functions for PCI Hotplug drivers to use */
1063 int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
1064 unsigned int pci_rescan_bus_bridge_resize(struct pci_dev *bridge);
1065 unsigned int pci_rescan_bus(struct pci_bus *bus);
1066 void pci_lock_rescan_remove(void);
1067 void pci_unlock_rescan_remove(void);
1069 /* Vital product data routines */
1070 ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
1071 ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
1073 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
1074 resource_size_t pcibios_retrieve_fw_addr(struct pci_dev *dev, int idx);
1075 void pci_bus_assign_resources(const struct pci_bus *bus);
1076 void pci_bus_size_bridges(struct pci_bus *bus);
1077 int pci_claim_resource(struct pci_dev *, int);
1078 int pci_claim_bridge_resource(struct pci_dev *bridge, int i);
1079 void pci_assign_unassigned_resources(void);
1080 void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge);
1081 void pci_assign_unassigned_bus_resources(struct pci_bus *bus);
1082 void pci_assign_unassigned_root_bus_resources(struct pci_bus *bus);
1083 void pdev_enable_device(struct pci_dev *);
1084 int pci_enable_resources(struct pci_dev *, int mask);
1085 void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
1086 int (*)(const struct pci_dev *, u8, u8));
1087 #define HAVE_PCI_REQ_REGIONS 2
1088 int __must_check pci_request_regions(struct pci_dev *, const char *);
1089 int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *);
1090 void pci_release_regions(struct pci_dev *);
1091 int __must_check pci_request_region(struct pci_dev *, int, const char *);
1092 int __must_check pci_request_region_exclusive(struct pci_dev *, int, const char *);
1093 void pci_release_region(struct pci_dev *, int);
1094 int pci_request_selected_regions(struct pci_dev *, int, const char *);
1095 int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *);
1096 void pci_release_selected_regions(struct pci_dev *, int);
1098 /* drivers/pci/bus.c */
1099 struct pci_bus *pci_bus_get(struct pci_bus *bus);
1100 void pci_bus_put(struct pci_bus *bus);
1101 void pci_add_resource(struct list_head *resources, struct resource *res);
1102 void pci_add_resource_offset(struct list_head *resources, struct resource *res,
1103 resource_size_t offset);
1104 void pci_free_resource_list(struct list_head *resources);
1105 void pci_bus_add_resource(struct pci_bus *bus, struct resource *res, unsigned int flags);
1106 struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n);
1107 void pci_bus_remove_resources(struct pci_bus *bus);
1109 #define pci_bus_for_each_resource(bus, res, i) \
1111 (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \
1114 int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
1115 struct resource *res, resource_size_t size,
1116 resource_size_t align, resource_size_t min,
1117 unsigned long type_mask,
1118 resource_size_t (*alignf)(void *,
1119 const struct resource *,
1125 int pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr);
1127 static inline dma_addr_t pci_bus_address(struct pci_dev *pdev, int bar)
1129 struct pci_bus_region region;
1131 pcibios_resource_to_bus(pdev->bus, ®ion, &pdev->resource[bar]);
1132 return region.start;
1135 /* Proper probing supporting hot-pluggable devices */
1136 int __must_check __pci_register_driver(struct pci_driver *, struct module *,
1137 const char *mod_name);
1140 * pci_register_driver must be a macro so that KBUILD_MODNAME can be expanded
1142 #define pci_register_driver(driver) \
1143 __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
1145 void pci_unregister_driver(struct pci_driver *dev);
1148 * module_pci_driver() - Helper macro for registering a PCI driver
1149 * @__pci_driver: pci_driver struct
1151 * Helper macro for PCI drivers which do not do anything special in module
1152 * init/exit. This eliminates a lot of boilerplate. Each module may only
1153 * use this macro once, and calling it replaces module_init() and module_exit()
1155 #define module_pci_driver(__pci_driver) \
1156 module_driver(__pci_driver, pci_register_driver, \
1157 pci_unregister_driver)
1159 struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
1160 int pci_add_dynid(struct pci_driver *drv,
1161 unsigned int vendor, unsigned int device,
1162 unsigned int subvendor, unsigned int subdevice,
1163 unsigned int class, unsigned int class_mask,
1164 unsigned long driver_data);
1165 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
1166 struct pci_dev *dev);
1167 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
1170 void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
1172 int pci_cfg_space_size(struct pci_dev *dev);
1173 unsigned char pci_bus_max_busnr(struct pci_bus *bus);
1174 void pci_setup_bridge(struct pci_bus *bus);
1175 resource_size_t pcibios_window_alignment(struct pci_bus *bus,
1176 unsigned long type);
1178 #define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0)
1179 #define PCI_VGA_STATE_CHANGE_DECODES (1 << 1)
1181 int pci_set_vga_state(struct pci_dev *pdev, bool decode,
1182 unsigned int command_bits, u32 flags);
1183 /* kmem_cache style wrapper around pci_alloc_consistent() */
1185 #include <linux/pci-dma.h>
1186 #include <linux/dmapool.h>
1188 #define pci_pool dma_pool
1189 #define pci_pool_create(name, pdev, size, align, allocation) \
1190 dma_pool_create(name, &pdev->dev, size, align, allocation)
1191 #define pci_pool_destroy(pool) dma_pool_destroy(pool)
1192 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
1193 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
1195 enum pci_dma_burst_strategy {
1196 PCI_DMA_BURST_INFINITY, /* make bursts as large as possible,
1197 strategy_parameter is N/A */
1198 PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter
1200 PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of
1201 strategy_parameter byte boundaries */
1205 u32 vector; /* kernel uses to write allocated vector */
1206 u16 entry; /* driver uses to specify entry, OS writes */
1210 #ifdef CONFIG_PCI_MSI
1211 int pci_msi_vec_count(struct pci_dev *dev);
1212 void pci_msi_shutdown(struct pci_dev *dev);
1213 void pci_disable_msi(struct pci_dev *dev);
1214 int pci_msix_vec_count(struct pci_dev *dev);
1215 int pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries, int nvec);
1216 void pci_msix_shutdown(struct pci_dev *dev);
1217 void pci_disable_msix(struct pci_dev *dev);
1218 void pci_restore_msi_state(struct pci_dev *dev);
1219 int pci_msi_enabled(void);
1220 int pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec);
1221 static inline int pci_enable_msi_exact(struct pci_dev *dev, int nvec)
1223 int rc = pci_enable_msi_range(dev, nvec, nvec);
1228 int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries,
1229 int minvec, int maxvec);
1230 static inline int pci_enable_msix_exact(struct pci_dev *dev,
1231 struct msix_entry *entries, int nvec)
1233 int rc = pci_enable_msix_range(dev, entries, nvec, nvec);
1239 static inline int pci_msi_vec_count(struct pci_dev *dev) { return -ENOSYS; }
1240 static inline void pci_msi_shutdown(struct pci_dev *dev) { }
1241 static inline void pci_disable_msi(struct pci_dev *dev) { }
1242 static inline int pci_msix_vec_count(struct pci_dev *dev) { return -ENOSYS; }
1243 static inline int pci_enable_msix(struct pci_dev *dev,
1244 struct msix_entry *entries, int nvec)
1246 static inline void pci_msix_shutdown(struct pci_dev *dev) { }
1247 static inline void pci_disable_msix(struct pci_dev *dev) { }
1248 static inline void pci_restore_msi_state(struct pci_dev *dev) { }
1249 static inline int pci_msi_enabled(void) { return 0; }
1250 static inline int pci_enable_msi_range(struct pci_dev *dev, int minvec,
1253 static inline int pci_enable_msi_exact(struct pci_dev *dev, int nvec)
1255 static inline int pci_enable_msix_range(struct pci_dev *dev,
1256 struct msix_entry *entries, int minvec, int maxvec)
1258 static inline int pci_enable_msix_exact(struct pci_dev *dev,
1259 struct msix_entry *entries, int nvec)
1263 #ifdef CONFIG_PCIEPORTBUS
1264 extern bool pcie_ports_disabled;
1265 extern bool pcie_ports_auto;
1267 #define pcie_ports_disabled true
1268 #define pcie_ports_auto false
1271 #ifdef CONFIG_PCIEASPM
1272 bool pcie_aspm_support_enabled(void);
1274 static inline bool pcie_aspm_support_enabled(void) { return false; }
1277 #ifdef CONFIG_PCIEAER
1278 void pci_no_aer(void);
1279 bool pci_aer_available(void);
1281 static inline void pci_no_aer(void) { }
1282 static inline bool pci_aer_available(void) { return false; }
1285 #ifdef CONFIG_PCIE_ECRC
1286 void pcie_set_ecrc_checking(struct pci_dev *dev);
1287 void pcie_ecrc_get_policy(char *str);
1289 static inline void pcie_set_ecrc_checking(struct pci_dev *dev) { }
1290 static inline void pcie_ecrc_get_policy(char *str) { }
1293 #define pci_enable_msi(pdev) pci_enable_msi_exact(pdev, 1)
1295 #ifdef CONFIG_HT_IRQ
1296 /* The functions a driver should call */
1297 int ht_create_irq(struct pci_dev *dev, int idx);
1298 void ht_destroy_irq(unsigned int irq);
1299 #endif /* CONFIG_HT_IRQ */
1301 void pci_cfg_access_lock(struct pci_dev *dev);
1302 bool pci_cfg_access_trylock(struct pci_dev *dev);
1303 void pci_cfg_access_unlock(struct pci_dev *dev);
1306 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
1307 * a PCI domain is defined to be a set of PCI buses which share
1308 * configuration space.
1310 #ifdef CONFIG_PCI_DOMAINS
1311 extern int pci_domains_supported;
1312 int pci_get_new_domain_nr(void);
1314 enum { pci_domains_supported = 0 };
1315 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
1316 static inline int pci_proc_domain(struct pci_bus *bus) { return 0; }
1317 static inline int pci_get_new_domain_nr(void) { return -ENOSYS; }
1318 #endif /* CONFIG_PCI_DOMAINS */
1321 * Generic implementation for PCI domain support. If your
1322 * architecture does not need custom management of PCI
1323 * domains then this implementation will be used
1325 #ifdef CONFIG_PCI_DOMAINS_GENERIC
1326 static inline int pci_domain_nr(struct pci_bus *bus)
1328 return bus->domain_nr;
1330 void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent);
1332 static inline void pci_bus_assign_domain_nr(struct pci_bus *bus,
1333 struct device *parent)
1338 /* some architectures require additional setup to direct VGA traffic */
1339 typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode,
1340 unsigned int command_bits, u32 flags);
1341 void pci_register_set_vga_state(arch_set_vga_state_t func);
1343 #else /* CONFIG_PCI is not enabled */
1346 * If the system does not have PCI, clearly these return errors. Define
1347 * these as simple inline functions to avoid hair in drivers.
1350 #define _PCI_NOP(o, s, t) \
1351 static inline int pci_##o##_config_##s(struct pci_dev *dev, \
1353 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
1355 #define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
1356 _PCI_NOP(o, word, u16 x) \
1357 _PCI_NOP(o, dword, u32 x)
1358 _PCI_NOP_ALL(read, *)
1359 _PCI_NOP_ALL(write,)
1361 static inline struct pci_dev *pci_get_device(unsigned int vendor,
1362 unsigned int device,
1363 struct pci_dev *from)
1366 static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
1367 unsigned int device,
1368 unsigned int ss_vendor,
1369 unsigned int ss_device,
1370 struct pci_dev *from)
1373 static inline struct pci_dev *pci_get_class(unsigned int class,
1374 struct pci_dev *from)
1377 #define pci_dev_present(ids) (0)
1378 #define no_pci_devices() (1)
1379 #define pci_dev_put(dev) do { } while (0)
1381 static inline void pci_set_master(struct pci_dev *dev) { }
1382 static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; }
1383 static inline void pci_disable_device(struct pci_dev *dev) { }
1384 static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask)
1386 static inline int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
1388 static inline int pci_set_dma_max_seg_size(struct pci_dev *dev,
1391 static inline int pci_set_dma_seg_boundary(struct pci_dev *dev,
1394 static inline int pci_assign_resource(struct pci_dev *dev, int i)
1396 static inline int __pci_register_driver(struct pci_driver *drv,
1397 struct module *owner)
1399 static inline int pci_register_driver(struct pci_driver *drv)
1401 static inline void pci_unregister_driver(struct pci_driver *drv) { }
1402 static inline int pci_find_capability(struct pci_dev *dev, int cap)
1404 static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
1407 static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
1410 /* Power management related routines */
1411 static inline int pci_save_state(struct pci_dev *dev) { return 0; }
1412 static inline void pci_restore_state(struct pci_dev *dev) { }
1413 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
1415 static inline int pci_wake_from_d3(struct pci_dev *dev, bool enable)
1417 static inline pci_power_t pci_choose_state(struct pci_dev *dev,
1420 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
1424 static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
1426 static inline void pci_release_regions(struct pci_dev *dev) { }
1428 #define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)
1430 static inline void pci_block_cfg_access(struct pci_dev *dev) { }
1431 static inline int pci_block_cfg_access_in_atomic(struct pci_dev *dev)
1433 static inline void pci_unblock_cfg_access(struct pci_dev *dev) { }
1435 static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
1437 static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
1440 static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
1444 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
1445 static inline struct pci_dev *pci_dev_get(struct pci_dev *dev) { return NULL; }
1446 static inline int pci_get_new_domain_nr(void) { return -ENOSYS; }
1448 #define dev_is_pci(d) (false)
1449 #define dev_is_pf(d) (false)
1450 #define dev_num_vf(d) (0)
1451 #endif /* CONFIG_PCI */
1453 /* Include architecture-dependent settings and functions */
1455 #include <asm/pci.h>
1457 /* these helpers provide future and backwards compatibility
1458 * for accessing popular PCI BAR info */
1459 #define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
1460 #define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end)
1461 #define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags)
1462 #define pci_resource_len(dev,bar) \
1463 ((pci_resource_start((dev), (bar)) == 0 && \
1464 pci_resource_end((dev), (bar)) == \
1465 pci_resource_start((dev), (bar))) ? 0 : \
1467 (pci_resource_end((dev), (bar)) - \
1468 pci_resource_start((dev), (bar)) + 1))
1470 /* Similar to the helpers above, these manipulate per-pci_dev
1471 * driver-specific data. They are really just a wrapper around
1472 * the generic device structure functions of these calls.
1474 static inline void *pci_get_drvdata(struct pci_dev *pdev)
1476 return dev_get_drvdata(&pdev->dev);
1479 static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
1481 dev_set_drvdata(&pdev->dev, data);
1484 /* If you want to know what to call your pci_dev, ask this function.
1485 * Again, it's a wrapper around the generic device.
1487 static inline const char *pci_name(const struct pci_dev *pdev)
1489 return dev_name(&pdev->dev);
1493 /* Some archs don't want to expose struct resource to userland as-is
1494 * in sysfs and /proc
1496 #ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER
1497 static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
1498 const struct resource *rsrc, resource_size_t *start,
1499 resource_size_t *end)
1501 *start = rsrc->start;
1504 #endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
1508 * The world is not perfect and supplies us with broken PCI devices.
1509 * For at least a part of these bugs we need a work-around, so both
1510 * generic (drivers/pci/quirks.c) and per-architecture code can define
1511 * fixup hooks to be called for particular buggy devices.
1515 u16 vendor; /* You can use PCI_ANY_ID here of course */
1516 u16 device; /* You can use PCI_ANY_ID here of course */
1517 u32 class; /* You can use PCI_ANY_ID here too */
1518 unsigned int class_shift; /* should be 0, 8, 16 */
1519 void (*hook)(struct pci_dev *dev);
1522 enum pci_fixup_pass {
1523 pci_fixup_early, /* Before probing BARs */
1524 pci_fixup_header, /* After reading configuration header */
1525 pci_fixup_final, /* Final phase of device fixups */
1526 pci_fixup_enable, /* pci_enable_device() time */
1527 pci_fixup_resume, /* pci_device_resume() */
1528 pci_fixup_suspend, /* pci_device_suspend() */
1529 pci_fixup_resume_early, /* pci_device_resume_early() */
1530 pci_fixup_suspend_late, /* pci_device_suspend_late() */
1533 /* Anonymous variables would be nice... */
1534 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, class, \
1535 class_shift, hook) \
1536 static const struct pci_fixup __PASTE(__pci_fixup_##name,__LINE__) __used \
1537 __attribute__((__section__(#section), aligned((sizeof(void *))))) \
1538 = { vendor, device, class, class_shift, hook };
1540 #define DECLARE_PCI_FIXUP_CLASS_EARLY(vendor, device, class, \
1541 class_shift, hook) \
1542 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1543 hook, vendor, device, class, class_shift, hook)
1544 #define DECLARE_PCI_FIXUP_CLASS_HEADER(vendor, device, class, \
1545 class_shift, hook) \
1546 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1547 hook, vendor, device, class, class_shift, hook)
1548 #define DECLARE_PCI_FIXUP_CLASS_FINAL(vendor, device, class, \
1549 class_shift, hook) \
1550 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1551 hook, vendor, device, class, class_shift, hook)
1552 #define DECLARE_PCI_FIXUP_CLASS_ENABLE(vendor, device, class, \
1553 class_shift, hook) \
1554 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1555 hook, vendor, device, class, class_shift, hook)
1556 #define DECLARE_PCI_FIXUP_CLASS_RESUME(vendor, device, class, \
1557 class_shift, hook) \
1558 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1559 resume##hook, vendor, device, class, \
1561 #define DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(vendor, device, class, \
1562 class_shift, hook) \
1563 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
1564 resume_early##hook, vendor, device, \
1565 class, class_shift, hook)
1566 #define DECLARE_PCI_FIXUP_CLASS_SUSPEND(vendor, device, class, \
1567 class_shift, hook) \
1568 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
1569 suspend##hook, vendor, device, class, \
1571 #define DECLARE_PCI_FIXUP_CLASS_SUSPEND_LATE(vendor, device, class, \
1572 class_shift, hook) \
1573 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \
1574 suspend_late##hook, vendor, device, \
1575 class, class_shift, hook)
1577 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
1578 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1579 hook, vendor, device, PCI_ANY_ID, 0, hook)
1580 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
1581 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1582 hook, vendor, device, PCI_ANY_ID, 0, hook)
1583 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
1584 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1585 hook, vendor, device, PCI_ANY_ID, 0, hook)
1586 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
1587 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1588 hook, vendor, device, PCI_ANY_ID, 0, hook)
1589 #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
1590 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1591 resume##hook, vendor, device, \
1592 PCI_ANY_ID, 0, hook)
1593 #define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \
1594 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
1595 resume_early##hook, vendor, device, \
1596 PCI_ANY_ID, 0, hook)
1597 #define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \
1598 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
1599 suspend##hook, vendor, device, \
1600 PCI_ANY_ID, 0, hook)
1601 #define DECLARE_PCI_FIXUP_SUSPEND_LATE(vendor, device, hook) \
1602 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \
1603 suspend_late##hook, vendor, device, \
1604 PCI_ANY_ID, 0, hook)
1606 #ifdef CONFIG_PCI_QUIRKS
1607 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
1608 int pci_dev_specific_acs_enabled(struct pci_dev *dev, u16 acs_flags);
1609 void pci_dev_specific_enable_acs(struct pci_dev *dev);
1611 static inline void pci_fixup_device(enum pci_fixup_pass pass,
1612 struct pci_dev *dev) { }
1613 static inline int pci_dev_specific_acs_enabled(struct pci_dev *dev,
1618 static inline void pci_dev_specific_enable_acs(struct pci_dev *dev) { }
1621 void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
1622 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
1623 void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
1624 int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name);
1625 int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
1627 void pcim_iounmap_regions(struct pci_dev *pdev, int mask);
1629 extern int pci_pci_problems;
1630 #define PCIPCI_FAIL 1 /* No PCI PCI DMA */
1631 #define PCIPCI_TRITON 2
1632 #define PCIPCI_NATOMA 4
1633 #define PCIPCI_VIAETBF 8
1634 #define PCIPCI_VSFX 16
1635 #define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
1636 #define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
1638 extern unsigned long pci_cardbus_io_size;
1639 extern unsigned long pci_cardbus_mem_size;
1640 extern u8 pci_dfl_cache_line_size;
1641 extern u8 pci_cache_line_size;
1643 extern unsigned long pci_hotplug_io_size;
1644 extern unsigned long pci_hotplug_mem_size;
1646 /* Architecture-specific versions may override these (weak) */
1647 void pcibios_disable_device(struct pci_dev *dev);
1648 void pcibios_set_master(struct pci_dev *dev);
1649 int pcibios_set_pcie_reset_state(struct pci_dev *dev,
1650 enum pcie_reset_state state);
1651 int pcibios_add_device(struct pci_dev *dev);
1652 void pcibios_release_device(struct pci_dev *dev);
1653 void pcibios_penalize_isa_irq(int irq, int active);
1655 #ifdef CONFIG_HIBERNATE_CALLBACKS
1656 extern struct dev_pm_ops pcibios_pm_ops;
1659 #ifdef CONFIG_PCI_MMCONFIG
1660 void __init pci_mmcfg_early_init(void);
1661 void __init pci_mmcfg_late_init(void);
1663 static inline void pci_mmcfg_early_init(void) { }
1664 static inline void pci_mmcfg_late_init(void) { }
1667 int pci_ext_cfg_avail(void);
1669 void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
1671 #ifdef CONFIG_PCI_IOV
1672 int pci_iov_virtfn_bus(struct pci_dev *dev, int id);
1673 int pci_iov_virtfn_devfn(struct pci_dev *dev, int id);
1675 int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
1676 void pci_disable_sriov(struct pci_dev *dev);
1677 int pci_num_vf(struct pci_dev *dev);
1678 int pci_vfs_assigned(struct pci_dev *dev);
1679 int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs);
1680 int pci_sriov_get_totalvfs(struct pci_dev *dev);
1681 resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno);
1683 static inline int pci_iov_virtfn_bus(struct pci_dev *dev, int id)
1687 static inline int pci_iov_virtfn_devfn(struct pci_dev *dev, int id)
1691 static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
1693 static inline void pci_disable_sriov(struct pci_dev *dev) { }
1694 static inline int pci_num_vf(struct pci_dev *dev) { return 0; }
1695 static inline int pci_vfs_assigned(struct pci_dev *dev)
1697 static inline int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs)
1699 static inline int pci_sriov_get_totalvfs(struct pci_dev *dev)
1701 static inline resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno)
1705 #if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE)
1706 void pci_hp_create_module_link(struct pci_slot *pci_slot);
1707 void pci_hp_remove_module_link(struct pci_slot *pci_slot);
1711 * pci_pcie_cap - get the saved PCIe capability offset
1714 * PCIe capability offset is calculated at PCI device initialization
1715 * time and saved in the data structure. This function returns saved
1716 * PCIe capability offset. Using this instead of pci_find_capability()
1717 * reduces unnecessary search in the PCI configuration space. If you
1718 * need to calculate PCIe capability offset from raw device for some
1719 * reasons, please use pci_find_capability() instead.
1721 static inline int pci_pcie_cap(struct pci_dev *dev)
1723 return dev->pcie_cap;
1727 * pci_is_pcie - check if the PCI device is PCI Express capable
1730 * Returns: true if the PCI device is PCI Express capable, false otherwise.
1732 static inline bool pci_is_pcie(struct pci_dev *dev)
1734 return pci_pcie_cap(dev);
1738 * pcie_caps_reg - get the PCIe Capabilities Register
1741 static inline u16 pcie_caps_reg(const struct pci_dev *dev)
1743 return dev->pcie_flags_reg;
1747 * pci_pcie_type - get the PCIe device/port type
1750 static inline int pci_pcie_type(const struct pci_dev *dev)
1752 return (pcie_caps_reg(dev) & PCI_EXP_FLAGS_TYPE) >> 4;
1755 void pci_request_acs(void);
1756 bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags);
1757 bool pci_acs_path_enabled(struct pci_dev *start,
1758 struct pci_dev *end, u16 acs_flags);
1760 #define PCI_VPD_LRDT 0x80 /* Large Resource Data Type */
1761 #define PCI_VPD_LRDT_ID(x) ((x) | PCI_VPD_LRDT)
1763 /* Large Resource Data Type Tag Item Names */
1764 #define PCI_VPD_LTIN_ID_STRING 0x02 /* Identifier String */
1765 #define PCI_VPD_LTIN_RO_DATA 0x10 /* Read-Only Data */
1766 #define PCI_VPD_LTIN_RW_DATA 0x11 /* Read-Write Data */
1768 #define PCI_VPD_LRDT_ID_STRING PCI_VPD_LRDT_ID(PCI_VPD_LTIN_ID_STRING)
1769 #define PCI_VPD_LRDT_RO_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RO_DATA)
1770 #define PCI_VPD_LRDT_RW_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RW_DATA)
1772 /* Small Resource Data Type Tag Item Names */
1773 #define PCI_VPD_STIN_END 0x78 /* End */
1775 #define PCI_VPD_SRDT_END PCI_VPD_STIN_END
1777 #define PCI_VPD_SRDT_TIN_MASK 0x78
1778 #define PCI_VPD_SRDT_LEN_MASK 0x07
1780 #define PCI_VPD_LRDT_TAG_SIZE 3
1781 #define PCI_VPD_SRDT_TAG_SIZE 1
1783 #define PCI_VPD_INFO_FLD_HDR_SIZE 3
1785 #define PCI_VPD_RO_KEYWORD_PARTNO "PN"
1786 #define PCI_VPD_RO_KEYWORD_MFR_ID "MN"
1787 #define PCI_VPD_RO_KEYWORD_VENDOR0 "V0"
1788 #define PCI_VPD_RO_KEYWORD_CHKSUM "RV"
1791 * pci_vpd_lrdt_size - Extracts the Large Resource Data Type length
1792 * @lrdt: Pointer to the beginning of the Large Resource Data Type tag
1794 * Returns the extracted Large Resource Data Type length.
1796 static inline u16 pci_vpd_lrdt_size(const u8 *lrdt)
1798 return (u16)lrdt[1] + ((u16)lrdt[2] << 8);
1802 * pci_vpd_srdt_size - Extracts the Small Resource Data Type length
1803 * @lrdt: Pointer to the beginning of the Small Resource Data Type tag
1805 * Returns the extracted Small Resource Data Type length.
1807 static inline u8 pci_vpd_srdt_size(const u8 *srdt)
1809 return (*srdt) & PCI_VPD_SRDT_LEN_MASK;
1813 * pci_vpd_info_field_size - Extracts the information field length
1814 * @lrdt: Pointer to the beginning of an information field header
1816 * Returns the extracted information field length.
1818 static inline u8 pci_vpd_info_field_size(const u8 *info_field)
1820 return info_field[2];
1824 * pci_vpd_find_tag - Locates the Resource Data Type tag provided
1825 * @buf: Pointer to buffered vpd data
1826 * @off: The offset into the buffer at which to begin the search
1827 * @len: The length of the vpd buffer
1828 * @rdt: The Resource Data Type to search for
1830 * Returns the index where the Resource Data Type was found or
1831 * -ENOENT otherwise.
1833 int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt);
1836 * pci_vpd_find_info_keyword - Locates an information field keyword in the VPD
1837 * @buf: Pointer to buffered vpd data
1838 * @off: The offset into the buffer at which to begin the search
1839 * @len: The length of the buffer area, relative to off, in which to search
1840 * @kw: The keyword to search for
1842 * Returns the index where the information field keyword was found or
1843 * -ENOENT otherwise.
1845 int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off,
1846 unsigned int len, const char *kw);
1848 /* PCI <-> OF binding helpers */
1851 void pci_set_of_node(struct pci_dev *dev);
1852 void pci_release_of_node(struct pci_dev *dev);
1853 void pci_set_bus_of_node(struct pci_bus *bus);
1854 void pci_release_bus_of_node(struct pci_bus *bus);
1856 /* Arch may override this (weak) */
1857 struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus);
1859 static inline struct device_node *
1860 pci_device_to_OF_node(const struct pci_dev *pdev)
1862 return pdev ? pdev->dev.of_node : NULL;
1865 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
1867 return bus ? bus->dev.of_node : NULL;
1870 #else /* CONFIG_OF */
1871 static inline void pci_set_of_node(struct pci_dev *dev) { }
1872 static inline void pci_release_of_node(struct pci_dev *dev) { }
1873 static inline void pci_set_bus_of_node(struct pci_bus *bus) { }
1874 static inline void pci_release_bus_of_node(struct pci_bus *bus) { }
1875 static inline struct device_node *
1876 pci_device_to_OF_node(const struct pci_dev *pdev) { return NULL; }
1877 #endif /* CONFIG_OF */
1880 static inline struct eeh_dev *pci_dev_to_eeh_dev(struct pci_dev *pdev)
1882 return pdev->dev.archdata.edev;
1886 int pci_for_each_dma_alias(struct pci_dev *pdev,
1887 int (*fn)(struct pci_dev *pdev,
1888 u16 alias, void *data), void *data);
1890 /* helper functions for operation of device flag */
1891 static inline void pci_set_dev_assigned(struct pci_dev *pdev)
1893 pdev->dev_flags |= PCI_DEV_FLAGS_ASSIGNED;
1895 static inline void pci_clear_dev_assigned(struct pci_dev *pdev)
1897 pdev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED;
1899 static inline bool pci_is_dev_assigned(struct pci_dev *pdev)
1901 return (pdev->dev_flags & PCI_DEV_FLAGS_ASSIGNED) == PCI_DEV_FLAGS_ASSIGNED;
1903 #endif /* LINUX_PCI_H */