1 /* SPDX-License-Identifier: GPL-2.0 */
5 * PCI defines and function prototypes
6 * Copyright 1994, Drew Eckhardt
7 * Copyright 1997--1999 Martin Mares <mj@ucw.cz>
9 * PCI Express ASPM defines and function prototypes
10 * Copyright (c) 2007 Intel Corp.
11 * Zhang Yanmin (yanmin.zhang@intel.com)
12 * Shaohua Li (shaohua.li@intel.com)
14 * For more information, please consult the following manuals (look at
15 * http://www.pcisig.com/ for how to get them):
17 * PCI BIOS Specification
18 * PCI Local Bus Specification
19 * PCI to PCI Bridge Specification
20 * PCI Express Specification
21 * PCI System Design Guide
27 #include <linux/mod_devicetable.h>
29 #include <linux/types.h>
30 #include <linux/init.h>
31 #include <linux/ioport.h>
32 #include <linux/list.h>
33 #include <linux/compiler.h>
34 #include <linux/errno.h>
35 #include <linux/kobject.h>
36 #include <linux/atomic.h>
37 #include <linux/device.h>
38 #include <linux/interrupt.h>
40 #include <linux/resource_ext.h>
41 #include <uapi/linux/pci.h>
43 #include <linux/pci_ids.h>
45 #define PCI_STATUS_ERROR_BITS (PCI_STATUS_DETECTED_PARITY | \
46 PCI_STATUS_SIG_SYSTEM_ERROR | \
47 PCI_STATUS_REC_MASTER_ABORT | \
48 PCI_STATUS_REC_TARGET_ABORT | \
49 PCI_STATUS_SIG_TARGET_ABORT | \
53 * The PCI interface treats multi-function devices as independent
54 * devices. The slot/function address of each device is encoded
55 * in a single byte as follows:
60 * PCI_DEVFN(), PCI_SLOT(), and PCI_FUNC() are defined in uapi/linux/pci.h.
61 * In the interest of not exposing interfaces to user-space unnecessarily,
62 * the following kernel-only defines are being added here.
64 #define PCI_DEVID(bus, devfn) ((((u16)(bus)) << 8) | (devfn))
65 /* return bus from PCI devid = ((u16)bus_number) << 8) | devfn */
66 #define PCI_BUS_NUM(x) (((x) >> 8) & 0xff)
68 /* pci_slot represents a physical slot */
70 struct pci_bus *bus; /* Bus this slot is on */
71 struct list_head list; /* Node in list of slots */
72 struct hotplug_slot *hotplug; /* Hotplug info (move here) */
73 unsigned char number; /* PCI_SLOT(pci_dev->devfn) */
77 static inline const char *pci_slot_name(const struct pci_slot *slot)
79 return kobject_name(&slot->kobj);
82 /* File state for mmap()s on /proc/bus/pci/X/Y */
88 /* For PCI devices, the region numbers are assigned this way: */
90 /* #0-5: standard PCI resources */
92 PCI_STD_RESOURCE_END = PCI_STD_RESOURCES + PCI_STD_NUM_BARS - 1,
94 /* #6: expansion ROM resource */
97 /* Device-specific resources */
100 PCI_IOV_RESOURCE_END = PCI_IOV_RESOURCES + PCI_SRIOV_NUM_BARS - 1,
103 /* PCI-to-PCI (P2P) bridge windows */
104 #define PCI_BRIDGE_IO_WINDOW (PCI_BRIDGE_RESOURCES + 0)
105 #define PCI_BRIDGE_MEM_WINDOW (PCI_BRIDGE_RESOURCES + 1)
106 #define PCI_BRIDGE_PREF_MEM_WINDOW (PCI_BRIDGE_RESOURCES + 2)
108 /* CardBus bridge windows */
109 #define PCI_CB_BRIDGE_IO_0_WINDOW (PCI_BRIDGE_RESOURCES + 0)
110 #define PCI_CB_BRIDGE_IO_1_WINDOW (PCI_BRIDGE_RESOURCES + 1)
111 #define PCI_CB_BRIDGE_MEM_0_WINDOW (PCI_BRIDGE_RESOURCES + 2)
112 #define PCI_CB_BRIDGE_MEM_1_WINDOW (PCI_BRIDGE_RESOURCES + 3)
114 /* Total number of bridge resources for P2P and CardBus */
115 #define PCI_BRIDGE_RESOURCE_NUM 4
117 /* Resources assigned to buses behind the bridge */
118 PCI_BRIDGE_RESOURCES,
119 PCI_BRIDGE_RESOURCE_END = PCI_BRIDGE_RESOURCES +
120 PCI_BRIDGE_RESOURCE_NUM - 1,
122 /* Total resources associated with a PCI device */
125 /* Preserve this for compatibility */
126 DEVICE_COUNT_RESOURCE = PCI_NUM_RESOURCES,
130 * enum pci_interrupt_pin - PCI INTx interrupt values
131 * @PCI_INTERRUPT_UNKNOWN: Unknown or unassigned interrupt
132 * @PCI_INTERRUPT_INTA: PCI INTA pin
133 * @PCI_INTERRUPT_INTB: PCI INTB pin
134 * @PCI_INTERRUPT_INTC: PCI INTC pin
135 * @PCI_INTERRUPT_INTD: PCI INTD pin
137 * Corresponds to values for legacy PCI INTx interrupts, as can be found in the
138 * PCI_INTERRUPT_PIN register.
140 enum pci_interrupt_pin {
141 PCI_INTERRUPT_UNKNOWN,
148 /* The number of legacy PCI INTx interrupts */
149 #define PCI_NUM_INTX 4
152 * pci_power_t values must match the bits in the Capabilities PME_Support
153 * and Control/Status PowerState fields in the Power Management capability.
155 typedef int __bitwise pci_power_t;
157 #define PCI_D0 ((pci_power_t __force) 0)
158 #define PCI_D1 ((pci_power_t __force) 1)
159 #define PCI_D2 ((pci_power_t __force) 2)
160 #define PCI_D3hot ((pci_power_t __force) 3)
161 #define PCI_D3cold ((pci_power_t __force) 4)
162 #define PCI_UNKNOWN ((pci_power_t __force) 5)
163 #define PCI_POWER_ERROR ((pci_power_t __force) -1)
165 /* Remember to update this when the list above changes! */
166 extern const char *pci_power_names[];
168 static inline const char *pci_power_name(pci_power_t state)
170 return pci_power_names[1 + (__force int) state];
174 * typedef pci_channel_state_t
176 * The pci_channel state describes connectivity between the CPU and
177 * the PCI device. If some PCI bus between here and the PCI device
178 * has crashed or locked up, this info is reflected here.
180 typedef unsigned int __bitwise pci_channel_state_t;
183 /* I/O channel is in normal state */
184 pci_channel_io_normal = (__force pci_channel_state_t) 1,
186 /* I/O to channel is blocked */
187 pci_channel_io_frozen = (__force pci_channel_state_t) 2,
189 /* PCI card is dead */
190 pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
193 typedef unsigned int __bitwise pcie_reset_state_t;
195 enum pcie_reset_state {
196 /* Reset is NOT asserted (Use to deassert reset) */
197 pcie_deassert_reset = (__force pcie_reset_state_t) 1,
199 /* Use #PERST to reset PCIe device */
200 pcie_warm_reset = (__force pcie_reset_state_t) 2,
202 /* Use PCIe Hot Reset to reset device */
203 pcie_hot_reset = (__force pcie_reset_state_t) 3
206 typedef unsigned short __bitwise pci_dev_flags_t;
208 /* INTX_DISABLE in PCI_COMMAND register disables MSI too */
209 PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG = (__force pci_dev_flags_t) (1 << 0),
210 /* Device configuration is irrevocably lost if disabled into D3 */
211 PCI_DEV_FLAGS_NO_D3 = (__force pci_dev_flags_t) (1 << 1),
212 /* Provide indication device is assigned by a Virtual Machine Manager */
213 PCI_DEV_FLAGS_ASSIGNED = (__force pci_dev_flags_t) (1 << 2),
214 /* Flag for quirk use to store if quirk-specific ACS is enabled */
215 PCI_DEV_FLAGS_ACS_ENABLED_QUIRK = (__force pci_dev_flags_t) (1 << 3),
216 /* Use a PCIe-to-PCI bridge alias even if !pci_is_pcie */
217 PCI_DEV_FLAG_PCIE_BRIDGE_ALIAS = (__force pci_dev_flags_t) (1 << 5),
218 /* Do not use bus resets for device */
219 PCI_DEV_FLAGS_NO_BUS_RESET = (__force pci_dev_flags_t) (1 << 6),
220 /* Do not use PM reset even if device advertises NoSoftRst- */
221 PCI_DEV_FLAGS_NO_PM_RESET = (__force pci_dev_flags_t) (1 << 7),
222 /* Get VPD from function 0 VPD */
223 PCI_DEV_FLAGS_VPD_REF_F0 = (__force pci_dev_flags_t) (1 << 8),
224 /* A non-root bridge where translation occurs, stop alias search here */
225 PCI_DEV_FLAGS_BRIDGE_XLATE_ROOT = (__force pci_dev_flags_t) (1 << 9),
226 /* Do not use FLR even if device advertises PCI_AF_CAP */
227 PCI_DEV_FLAGS_NO_FLR_RESET = (__force pci_dev_flags_t) (1 << 10),
228 /* Don't use Relaxed Ordering for TLPs directed at this device */
229 PCI_DEV_FLAGS_NO_RELAXED_ORDERING = (__force pci_dev_flags_t) (1 << 11),
232 enum pci_irq_reroute_variant {
233 INTEL_IRQ_REROUTE_VARIANT = 1,
234 MAX_IRQ_REROUTE_VARIANTS = 3
237 typedef unsigned short __bitwise pci_bus_flags_t;
239 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
240 PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2,
241 PCI_BUS_FLAGS_NO_AERSID = (__force pci_bus_flags_t) 4,
242 PCI_BUS_FLAGS_NO_EXTCFG = (__force pci_bus_flags_t) 8,
245 /* Values from Link Status register, PCIe r3.1, sec 7.8.8 */
246 enum pcie_link_width {
247 PCIE_LNK_WIDTH_RESRV = 0x00,
255 PCIE_LNK_WIDTH_UNKNOWN = 0xff,
258 /* See matching string table in pci_speed_string() */
260 PCI_SPEED_33MHz = 0x00,
261 PCI_SPEED_66MHz = 0x01,
262 PCI_SPEED_66MHz_PCIX = 0x02,
263 PCI_SPEED_100MHz_PCIX = 0x03,
264 PCI_SPEED_133MHz_PCIX = 0x04,
265 PCI_SPEED_66MHz_PCIX_ECC = 0x05,
266 PCI_SPEED_100MHz_PCIX_ECC = 0x06,
267 PCI_SPEED_133MHz_PCIX_ECC = 0x07,
268 PCI_SPEED_66MHz_PCIX_266 = 0x09,
269 PCI_SPEED_100MHz_PCIX_266 = 0x0a,
270 PCI_SPEED_133MHz_PCIX_266 = 0x0b,
276 PCI_SPEED_66MHz_PCIX_533 = 0x11,
277 PCI_SPEED_100MHz_PCIX_533 = 0x12,
278 PCI_SPEED_133MHz_PCIX_533 = 0x13,
279 PCIE_SPEED_2_5GT = 0x14,
280 PCIE_SPEED_5_0GT = 0x15,
281 PCIE_SPEED_8_0GT = 0x16,
282 PCIE_SPEED_16_0GT = 0x17,
283 PCIE_SPEED_32_0GT = 0x18,
284 PCIE_SPEED_64_0GT = 0x19,
285 PCI_SPEED_UNKNOWN = 0xff,
288 enum pci_bus_speed pcie_get_speed_cap(struct pci_dev *dev);
289 enum pcie_link_width pcie_get_width_cap(struct pci_dev *dev);
291 struct pci_cap_saved_data {
298 struct pci_cap_saved_state {
299 struct hlist_node next;
300 struct pci_cap_saved_data cap;
304 struct pcie_link_state;
310 /* The pci_dev structure describes PCI devices */
312 struct list_head bus_list; /* Node in per-bus list */
313 struct pci_bus *bus; /* Bus this device is on */
314 struct pci_bus *subordinate; /* Bus this device bridges to */
316 void *sysdata; /* Hook for sys-specific extension */
317 struct proc_dir_entry *procent; /* Device entry in /proc/bus/pci */
318 struct pci_slot *slot; /* Physical slot this device is in */
320 unsigned int devfn; /* Encoded device & function index */
321 unsigned short vendor;
322 unsigned short device;
323 unsigned short subsystem_vendor;
324 unsigned short subsystem_device;
325 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
326 u8 revision; /* PCI revision, low byte of class word */
327 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
328 #ifdef CONFIG_PCIEAER
329 u16 aer_cap; /* AER capability offset */
330 struct aer_stats *aer_stats; /* AER stats for this device */
332 #ifdef CONFIG_PCIEPORTBUS
333 struct rcec_ea *rcec_ea; /* RCEC cached endpoint association */
334 struct pci_dev *rcec; /* Associated RCEC device */
336 u8 pcie_cap; /* PCIe capability offset */
337 u8 msi_cap; /* MSI capability offset */
338 u8 msix_cap; /* MSI-X capability offset */
339 u8 pcie_mpss:3; /* PCIe Max Payload Size Supported */
340 u8 rom_base_reg; /* Config register controlling ROM */
341 u8 pin; /* Interrupt pin this device uses */
342 u16 pcie_flags_reg; /* Cached PCIe Capabilities Register */
343 unsigned long *dma_alias_mask;/* Mask of enabled devfn aliases */
345 struct pci_driver *driver; /* Driver bound to this device */
346 u64 dma_mask; /* Mask of the bits of bus address this
347 device implements. Normally this is
348 0xffffffff. You only need to change
349 this if your device has broken DMA
350 or supports 64-bit transfers. */
352 struct device_dma_parameters dma_parms;
354 pci_power_t current_state; /* Current operating state. In ACPI,
355 this is D0-D3, D0 being fully
356 functional, and D3 being off. */
357 unsigned int imm_ready:1; /* Supports Immediate Readiness */
358 u8 pm_cap; /* PM capability offset */
359 unsigned int pme_support:5; /* Bitmask of states from which PME#
361 unsigned int pme_poll:1; /* Poll device's PME status bit */
362 unsigned int d1_support:1; /* Low power state D1 is supported */
363 unsigned int d2_support:1; /* Low power state D2 is supported */
364 unsigned int no_d1d2:1; /* D1 and D2 are forbidden */
365 unsigned int no_d3cold:1; /* D3cold is forbidden */
366 unsigned int bridge_d3:1; /* Allow D3 for bridge */
367 unsigned int d3cold_allowed:1; /* D3cold is allowed by user */
368 unsigned int mmio_always_on:1; /* Disallow turning off io/mem
369 decoding during BAR sizing */
370 unsigned int wakeup_prepared:1;
371 unsigned int runtime_d3cold:1; /* Whether go through runtime
372 D3cold, not set for devices
373 powered on/off by the
374 corresponding bridge */
375 unsigned int skip_bus_pm:1; /* Internal: Skip bus-level PM */
376 unsigned int ignore_hotplug:1; /* Ignore hotplug events */
377 unsigned int hotplug_user_indicators:1; /* SlotCtl indicators
378 controlled exclusively by
380 unsigned int clear_retrain_link:1; /* Need to clear Retrain Link
382 unsigned int d3hot_delay; /* D3hot->D0 transition time in ms */
383 unsigned int d3cold_delay; /* D3cold->D0 transition time in ms */
385 #ifdef CONFIG_PCIEASPM
386 struct pcie_link_state *link_state; /* ASPM link state */
387 unsigned int ltr_path:1; /* Latency Tolerance Reporting
388 supported from root to here */
389 u16 l1ss; /* L1SS Capability pointer */
391 unsigned int eetlp_prefix_path:1; /* End-to-End TLP Prefix */
393 pci_channel_state_t error_state; /* Current connectivity state */
394 struct device dev; /* Generic device interface */
396 int cfg_size; /* Size of config space */
399 * Instead of touching interrupt line and base address registers
400 * directly, use the values stored here. They might be different!
403 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
405 bool match_driver; /* Skip attaching driver */
407 unsigned int transparent:1; /* Subtractive decode bridge */
408 unsigned int io_window:1; /* Bridge has I/O window */
409 unsigned int pref_window:1; /* Bridge has pref mem window */
410 unsigned int pref_64_window:1; /* Pref mem window is 64-bit */
411 unsigned int multifunction:1; /* Multi-function device */
413 unsigned int is_busmaster:1; /* Is busmaster */
414 unsigned int no_msi:1; /* May not use MSI */
415 unsigned int no_64bit_msi:1; /* May only use 32-bit MSIs */
416 unsigned int block_cfg_access:1; /* Config space access blocked */
417 unsigned int broken_parity_status:1; /* Generates false positive parity */
418 unsigned int irq_reroute_variant:2; /* Needs IRQ rerouting variant */
419 unsigned int msi_enabled:1;
420 unsigned int msix_enabled:1;
421 unsigned int ari_enabled:1; /* ARI forwarding */
422 unsigned int ats_enabled:1; /* Address Translation Svc */
423 unsigned int pasid_enabled:1; /* Process Address Space ID */
424 unsigned int pri_enabled:1; /* Page Request Interface */
425 unsigned int is_managed:1;
426 unsigned int needs_freset:1; /* Requires fundamental reset */
427 unsigned int state_saved:1;
428 unsigned int is_physfn:1;
429 unsigned int is_virtfn:1;
430 unsigned int reset_fn:1;
431 unsigned int is_hotplug_bridge:1;
432 unsigned int shpc_managed:1; /* SHPC owned by shpchp */
433 unsigned int is_thunderbolt:1; /* Thunderbolt controller */
435 * Devices marked being untrusted are the ones that can potentially
436 * execute DMA attacks and similar. They are typically connected
437 * through external ports such as Thunderbolt but not limited to
438 * that. When an IOMMU is enabled they should be getting full
439 * mappings to make sure they cannot access arbitrary memory.
441 unsigned int untrusted:1;
443 * Info from the platform, e.g., ACPI or device tree, may mark a
444 * device as "external-facing". An external-facing device is
445 * itself internal but devices downstream from it are external.
447 unsigned int external_facing:1;
448 unsigned int broken_intx_masking:1; /* INTx masking can't be used */
449 unsigned int io_window_1k:1; /* Intel bridge 1K I/O windows */
450 unsigned int irq_managed:1;
451 unsigned int non_compliant_bars:1; /* Broken BARs; ignore them */
452 unsigned int is_probed:1; /* Device probing in progress */
453 unsigned int link_active_reporting:1;/* Device capable of reporting link active */
454 unsigned int no_vf_scan:1; /* Don't scan for VFs after IOV enablement */
455 unsigned int no_command_memory:1; /* No PCI_COMMAND_MEMORY */
456 pci_dev_flags_t dev_flags;
457 atomic_t enable_cnt; /* pci_enable_device has been called */
459 u32 saved_config_space[16]; /* Config space saved at suspend time */
460 struct hlist_head saved_cap_space;
461 struct bin_attribute *rom_attr; /* Attribute descriptor for sysfs ROM entry */
462 int rom_attr_enabled; /* Display of ROM attribute enabled? */
463 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
464 struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
466 #ifdef CONFIG_HOTPLUG_PCI_PCIE
467 unsigned int broken_cmd_compl:1; /* No compl for some cmds */
469 #ifdef CONFIG_PCIE_PTM
470 unsigned int ptm_root:1;
471 unsigned int ptm_enabled:1;
474 #ifdef CONFIG_PCI_MSI
475 const struct attribute_group **msi_irq_groups;
478 #ifdef CONFIG_PCIE_DPC
480 unsigned int dpc_rp_extensions:1;
483 #ifdef CONFIG_PCI_ATS
485 struct pci_sriov *sriov; /* PF: SR-IOV info */
486 struct pci_dev *physfn; /* VF: related PF */
488 u16 ats_cap; /* ATS Capability offset */
489 u8 ats_stu; /* ATS Smallest Translation Unit */
491 #ifdef CONFIG_PCI_PRI
492 u16 pri_cap; /* PRI Capability offset */
493 u32 pri_reqs_alloc; /* Number of PRI requests allocated */
494 unsigned int pasid_required:1; /* PRG Response PASID Required */
496 #ifdef CONFIG_PCI_PASID
497 u16 pasid_cap; /* PASID Capability offset */
500 #ifdef CONFIG_PCI_P2PDMA
501 struct pci_p2pdma *p2pdma;
503 u16 acs_cap; /* ACS Capability offset */
504 phys_addr_t rom; /* Physical address if not from BAR */
505 size_t romlen; /* Length if not from BAR */
506 char *driver_override; /* Driver name to force a match */
508 unsigned long priv_flags; /* Private flags for the PCI driver */
511 static inline struct pci_dev *pci_physfn(struct pci_dev *dev)
513 #ifdef CONFIG_PCI_IOV
520 struct pci_dev *pci_alloc_dev(struct pci_bus *bus);
522 #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
523 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
525 static inline int pci_channel_offline(struct pci_dev *pdev)
527 return (pdev->error_state != pci_channel_io_normal);
530 struct pci_host_bridge {
532 struct pci_bus *bus; /* Root bus */
534 struct pci_ops *child_ops;
537 struct list_head windows; /* resource_entry */
538 struct list_head dma_ranges; /* dma ranges resource list */
539 u8 (*swizzle_irq)(struct pci_dev *, u8 *); /* Platform IRQ swizzler */
540 int (*map_irq)(const struct pci_dev *, u8, u8);
541 void (*release_fn)(struct pci_host_bridge *);
543 struct msi_controller *msi;
544 unsigned int ignore_reset_delay:1; /* For entire hierarchy */
545 unsigned int no_ext_tags:1; /* No Extended Tags */
546 unsigned int native_aer:1; /* OS may use PCIe AER */
547 unsigned int native_pcie_hotplug:1; /* OS may use PCIe hotplug */
548 unsigned int native_shpc_hotplug:1; /* OS may use SHPC hotplug */
549 unsigned int native_pme:1; /* OS may use PCIe PME */
550 unsigned int native_ltr:1; /* OS may use PCIe LTR */
551 unsigned int native_dpc:1; /* OS may use PCIe DPC */
552 unsigned int preserve_config:1; /* Preserve FW resource setup */
553 unsigned int size_windows:1; /* Enable root bus sizing */
555 /* Resource alignment requirements */
556 resource_size_t (*align_resource)(struct pci_dev *dev,
557 const struct resource *res,
558 resource_size_t start,
559 resource_size_t size,
560 resource_size_t align);
561 unsigned long private[] ____cacheline_aligned;
564 #define to_pci_host_bridge(n) container_of(n, struct pci_host_bridge, dev)
566 static inline void *pci_host_bridge_priv(struct pci_host_bridge *bridge)
568 return (void *)bridge->private;
571 static inline struct pci_host_bridge *pci_host_bridge_from_priv(void *priv)
573 return container_of(priv, struct pci_host_bridge, private);
576 struct pci_host_bridge *pci_alloc_host_bridge(size_t priv);
577 struct pci_host_bridge *devm_pci_alloc_host_bridge(struct device *dev,
579 void pci_free_host_bridge(struct pci_host_bridge *bridge);
580 struct pci_host_bridge *pci_find_host_bridge(struct pci_bus *bus);
582 void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
583 void (*release_fn)(struct pci_host_bridge *),
586 int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge);
589 * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond
590 * to P2P or CardBus bridge windows) go in a table. Additional ones (for
591 * buses below host bridges or subtractive decode bridges) go in the list.
592 * Use pci_bus_for_each_resource() to iterate through all the resources.
596 * PCI_SUBTRACTIVE_DECODE means the bridge forwards the window implicitly
597 * and there's no way to program the bridge with the details of the window.
598 * This does not apply to ACPI _CRS windows, even with the _DEC subtractive-
599 * decode bit set, because they are explicit and can be programmed with _SRS.
601 #define PCI_SUBTRACTIVE_DECODE 0x1
603 struct pci_bus_resource {
604 struct list_head list;
605 struct resource *res;
609 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
612 struct list_head node; /* Node in list of buses */
613 struct pci_bus *parent; /* Parent bus this bridge is on */
614 struct list_head children; /* List of child buses */
615 struct list_head devices; /* List of devices on this bus */
616 struct pci_dev *self; /* Bridge device as seen by parent */
617 struct list_head slots; /* List of slots on this bus;
618 protected by pci_slot_mutex */
619 struct resource *resource[PCI_BRIDGE_RESOURCE_NUM];
620 struct list_head resources; /* Address space routed to this bus */
621 struct resource busn_res; /* Bus numbers routed to this bus */
623 struct pci_ops *ops; /* Configuration access functions */
624 struct msi_controller *msi; /* MSI controller */
625 void *sysdata; /* Hook for sys-specific extension */
626 struct proc_dir_entry *procdir; /* Directory entry in /proc/bus/pci */
628 unsigned char number; /* Bus number */
629 unsigned char primary; /* Number of primary bridge */
630 unsigned char max_bus_speed; /* enum pci_bus_speed */
631 unsigned char cur_bus_speed; /* enum pci_bus_speed */
632 #ifdef CONFIG_PCI_DOMAINS_GENERIC
638 unsigned short bridge_ctl; /* Manage NO_ISA/FBB/et al behaviors */
639 pci_bus_flags_t bus_flags; /* Inherited by child buses */
640 struct device *bridge;
642 struct bin_attribute *legacy_io; /* Legacy I/O for this bus */
643 struct bin_attribute *legacy_mem; /* Legacy mem */
644 unsigned int is_added:1;
647 #define to_pci_bus(n) container_of(n, struct pci_bus, dev)
649 static inline u16 pci_dev_id(struct pci_dev *dev)
651 return PCI_DEVID(dev->bus->number, dev->devfn);
655 * Returns true if the PCI bus is root (behind host-PCI bridge),
658 * Some code assumes that "bus->self == NULL" means that bus is a root bus.
659 * This is incorrect because "virtual" buses added for SR-IOV (via
660 * virtfn_add_bus()) have "bus->self == NULL" but are not root buses.
662 static inline bool pci_is_root_bus(struct pci_bus *pbus)
664 return !(pbus->parent);
668 * pci_is_bridge - check if the PCI device is a bridge
671 * Return true if the PCI device is bridge whether it has subordinate
674 static inline bool pci_is_bridge(struct pci_dev *dev)
676 return dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
677 dev->hdr_type == PCI_HEADER_TYPE_CARDBUS;
680 #define for_each_pci_bridge(dev, bus) \
681 list_for_each_entry(dev, &bus->devices, bus_list) \
682 if (!pci_is_bridge(dev)) {} else
684 static inline struct pci_dev *pci_upstream_bridge(struct pci_dev *dev)
686 dev = pci_physfn(dev);
687 if (pci_is_root_bus(dev->bus))
690 return dev->bus->self;
693 #ifdef CONFIG_PCI_MSI
694 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev)
696 return pci_dev->msi_enabled || pci_dev->msix_enabled;
699 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false; }
702 /* Error values that may be returned by PCI functions */
703 #define PCIBIOS_SUCCESSFUL 0x00
704 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
705 #define PCIBIOS_BAD_VENDOR_ID 0x83
706 #define PCIBIOS_DEVICE_NOT_FOUND 0x86
707 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87
708 #define PCIBIOS_SET_FAILED 0x88
709 #define PCIBIOS_BUFFER_TOO_SMALL 0x89
711 /* Translate above to generic errno for passing back through non-PCI code */
712 static inline int pcibios_err_to_errno(int err)
714 if (err <= PCIBIOS_SUCCESSFUL)
715 return err; /* Assume already errno */
718 case PCIBIOS_FUNC_NOT_SUPPORTED:
720 case PCIBIOS_BAD_VENDOR_ID:
722 case PCIBIOS_DEVICE_NOT_FOUND:
724 case PCIBIOS_BAD_REGISTER_NUMBER:
726 case PCIBIOS_SET_FAILED:
728 case PCIBIOS_BUFFER_TOO_SMALL:
735 /* Low-level architecture-dependent routines */
738 int (*add_bus)(struct pci_bus *bus);
739 void (*remove_bus)(struct pci_bus *bus);
740 void __iomem *(*map_bus)(struct pci_bus *bus, unsigned int devfn, int where);
741 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
742 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
746 * ACPI needs to be able to access PCI config space before we've done a
747 * PCI bus scan and created pci_bus structures.
749 int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn,
750 int reg, int len, u32 *val);
751 int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,
752 int reg, int len, u32 val);
754 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
755 typedef u64 pci_bus_addr_t;
757 typedef u32 pci_bus_addr_t;
760 struct pci_bus_region {
761 pci_bus_addr_t start;
766 spinlock_t lock; /* Protects list, index */
767 struct list_head list; /* For IDs added at runtime */
772 * PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
773 * a set of callbacks in struct pci_error_handlers, that device driver
774 * will be notified of PCI bus errors, and will be driven to recovery
775 * when an error occurs.
778 typedef unsigned int __bitwise pci_ers_result_t;
780 enum pci_ers_result {
781 /* No result/none/not supported in device driver */
782 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
784 /* Device driver can recover without slot reset */
785 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
787 /* Device driver wants slot to be reset */
788 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
790 /* Device has completely failed, is unrecoverable */
791 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
793 /* Device driver is fully recovered and operational */
794 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
796 /* No AER capabilities registered for the driver */
797 PCI_ERS_RESULT_NO_AER_DRIVER = (__force pci_ers_result_t) 6,
800 /* PCI bus error event callbacks */
801 struct pci_error_handlers {
802 /* PCI bus error detected on this device */
803 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
804 pci_channel_state_t error);
806 /* MMIO has been re-enabled, but not DMA */
807 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
809 /* PCI slot has been reset */
810 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
812 /* PCI function reset prepare or completed */
813 void (*reset_prepare)(struct pci_dev *dev);
814 void (*reset_done)(struct pci_dev *dev);
816 /* Device driver may resume normal operations */
817 void (*resume)(struct pci_dev *dev);
824 * struct pci_driver - PCI driver structure
825 * @node: List of driver structures.
826 * @name: Driver name.
827 * @id_table: Pointer to table of device IDs the driver is
828 * interested in. Most drivers should export this
829 * table using MODULE_DEVICE_TABLE(pci,...).
830 * @probe: This probing function gets called (during execution
831 * of pci_register_driver() for already existing
832 * devices or later if a new device gets inserted) for
833 * all PCI devices which match the ID table and are not
834 * "owned" by the other drivers yet. This function gets
835 * passed a "struct pci_dev \*" for each device whose
836 * entry in the ID table matches the device. The probe
837 * function returns zero when the driver chooses to
838 * take "ownership" of the device or an error code
839 * (negative number) otherwise.
840 * The probe function always gets called from process
841 * context, so it can sleep.
842 * @remove: The remove() function gets called whenever a device
843 * being handled by this driver is removed (either during
844 * deregistration of the driver or when it's manually
845 * pulled out of a hot-pluggable slot).
846 * The remove function always gets called from process
847 * context, so it can sleep.
848 * @suspend: Put device into low power state.
849 * @resume: Wake device from low power state.
850 * (Please see Documentation/power/pci.rst for descriptions
851 * of PCI Power Management and the related functions.)
852 * @shutdown: Hook into reboot_notifier_list (kernel/sys.c).
853 * Intended to stop any idling DMA operations.
854 * Useful for enabling wake-on-lan (NIC) or changing
855 * the power state of a device before reboot.
856 * e.g. drivers/net/e100.c.
857 * @sriov_configure: Optional driver callback to allow configuration of
858 * number of VFs to enable via sysfs "sriov_numvfs" file.
859 * @err_handler: See Documentation/PCI/pci-error-recovery.rst
860 * @groups: Sysfs attribute groups.
861 * @driver: Driver model structure.
862 * @dynids: List of dynamically added device IDs.
865 struct list_head node;
867 const struct pci_device_id *id_table; /* Must be non-NULL for probe to be called */
868 int (*probe)(struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
869 void (*remove)(struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
870 int (*suspend)(struct pci_dev *dev, pm_message_t state); /* Device suspended */
871 int (*resume)(struct pci_dev *dev); /* Device woken up */
872 void (*shutdown)(struct pci_dev *dev);
873 int (*sriov_configure)(struct pci_dev *dev, int num_vfs); /* On PF */
874 const struct pci_error_handlers *err_handler;
875 const struct attribute_group **groups;
876 struct device_driver driver;
877 struct pci_dynids dynids;
880 #define to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
883 * PCI_DEVICE - macro used to describe a specific PCI device
884 * @vend: the 16 bit PCI Vendor ID
885 * @dev: the 16 bit PCI Device ID
887 * This macro is used to create a struct pci_device_id that matches a
888 * specific device. The subvendor and subdevice fields will be set to
891 #define PCI_DEVICE(vend,dev) \
892 .vendor = (vend), .device = (dev), \
893 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
896 * PCI_DEVICE_SUB - macro used to describe a specific PCI device with subsystem
897 * @vend: the 16 bit PCI Vendor ID
898 * @dev: the 16 bit PCI Device ID
899 * @subvend: the 16 bit PCI Subvendor ID
900 * @subdev: the 16 bit PCI Subdevice ID
902 * This macro is used to create a struct pci_device_id that matches a
903 * specific device with subsystem information.
905 #define PCI_DEVICE_SUB(vend, dev, subvend, subdev) \
906 .vendor = (vend), .device = (dev), \
907 .subvendor = (subvend), .subdevice = (subdev)
910 * PCI_DEVICE_CLASS - macro used to describe a specific PCI device class
911 * @dev_class: the class, subclass, prog-if triple for this device
912 * @dev_class_mask: the class mask for this device
914 * This macro is used to create a struct pci_device_id that matches a
915 * specific PCI class. The vendor, device, subvendor, and subdevice
916 * fields will be set to PCI_ANY_ID.
918 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
919 .class = (dev_class), .class_mask = (dev_class_mask), \
920 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
921 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
924 * PCI_VDEVICE - macro used to describe a specific PCI device in short form
925 * @vend: the vendor name
926 * @dev: the 16 bit PCI Device ID
928 * This macro is used to create a struct pci_device_id that matches a
929 * specific PCI device. The subvendor, and subdevice fields will be set
930 * to PCI_ANY_ID. The macro allows the next field to follow as the device
933 #define PCI_VDEVICE(vend, dev) \
934 .vendor = PCI_VENDOR_ID_##vend, .device = (dev), \
935 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0
938 * PCI_DEVICE_DATA - macro used to describe a specific PCI device in very short form
939 * @vend: the vendor name (without PCI_VENDOR_ID_ prefix)
940 * @dev: the device name (without PCI_DEVICE_ID_<vend>_ prefix)
941 * @data: the driver data to be filled
943 * This macro is used to create a struct pci_device_id that matches a
944 * specific PCI device. The subvendor, and subdevice fields will be set
947 #define PCI_DEVICE_DATA(vend, dev, data) \
948 .vendor = PCI_VENDOR_ID_##vend, .device = PCI_DEVICE_ID_##vend##_##dev, \
949 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0, \
950 .driver_data = (kernel_ulong_t)(data)
953 PCI_REASSIGN_ALL_RSRC = 0x00000001, /* Ignore firmware setup */
954 PCI_REASSIGN_ALL_BUS = 0x00000002, /* Reassign all bus numbers */
955 PCI_PROBE_ONLY = 0x00000004, /* Use existing setup */
956 PCI_CAN_SKIP_ISA_ALIGN = 0x00000008, /* Don't do ISA alignment */
957 PCI_ENABLE_PROC_DOMAINS = 0x00000010, /* Enable domains in /proc */
958 PCI_COMPAT_DOMAIN_0 = 0x00000020, /* ... except domain 0 */
959 PCI_SCAN_ALL_PCIE_DEVS = 0x00000040, /* Scan all, not just dev 0 */
962 #define PCI_IRQ_LEGACY (1 << 0) /* Allow legacy interrupts */
963 #define PCI_IRQ_MSI (1 << 1) /* Allow MSI interrupts */
964 #define PCI_IRQ_MSIX (1 << 2) /* Allow MSI-X interrupts */
965 #define PCI_IRQ_AFFINITY (1 << 3) /* Auto-assign affinity */
967 /* These external functions are only available when PCI support is enabled */
970 extern unsigned int pci_flags;
972 static inline void pci_set_flags(int flags) { pci_flags = flags; }
973 static inline void pci_add_flags(int flags) { pci_flags |= flags; }
974 static inline void pci_clear_flags(int flags) { pci_flags &= ~flags; }
975 static inline int pci_has_flag(int flag) { return pci_flags & flag; }
977 void pcie_bus_configure_settings(struct pci_bus *bus);
979 enum pcie_bus_config_types {
980 PCIE_BUS_TUNE_OFF, /* Don't touch MPS at all */
981 PCIE_BUS_DEFAULT, /* Ensure MPS matches upstream bridge */
982 PCIE_BUS_SAFE, /* Use largest MPS boot-time devices support */
983 PCIE_BUS_PERFORMANCE, /* Use MPS and MRRS for best performance */
984 PCIE_BUS_PEER2PEER, /* Set MPS = 128 for all devices */
987 extern enum pcie_bus_config_types pcie_bus_config;
989 extern struct bus_type pci_bus_type;
991 /* Do NOT directly access these two variables, unless you are arch-specific PCI
992 * code, or PCI core code. */
993 extern struct list_head pci_root_buses; /* List of all known PCI buses */
994 /* Some device drivers need know if PCI is initiated */
995 int no_pci_devices(void);
997 void pcibios_resource_survey_bus(struct pci_bus *bus);
998 void pcibios_bus_add_device(struct pci_dev *pdev);
999 void pcibios_add_bus(struct pci_bus *bus);
1000 void pcibios_remove_bus(struct pci_bus *bus);
1001 void pcibios_fixup_bus(struct pci_bus *);
1002 int __must_check pcibios_enable_device(struct pci_dev *, int mask);
1003 /* Architecture-specific versions may override this (weak) */
1004 char *pcibios_setup(char *str);
1006 /* Used only when drivers/pci/setup.c is used */
1007 resource_size_t pcibios_align_resource(void *, const struct resource *,
1011 /* Weak but can be overridden by arch */
1012 void pci_fixup_cardbus(struct pci_bus *);
1014 /* Generic PCI functions used internally */
1016 void pcibios_resource_to_bus(struct pci_bus *bus, struct pci_bus_region *region,
1017 struct resource *res);
1018 void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res,
1019 struct pci_bus_region *region);
1020 void pcibios_scan_specific_bus(int busn);
1021 struct pci_bus *pci_find_bus(int domain, int busnr);
1022 void pci_bus_add_devices(const struct pci_bus *bus);
1023 struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata);
1024 struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
1025 struct pci_ops *ops, void *sysdata,
1026 struct list_head *resources);
1027 int pci_host_probe(struct pci_host_bridge *bridge);
1028 int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax);
1029 int pci_bus_update_busn_res_end(struct pci_bus *b, int busmax);
1030 void pci_bus_release_busn_res(struct pci_bus *b);
1031 struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
1032 struct pci_ops *ops, void *sysdata,
1033 struct list_head *resources);
1034 int pci_scan_root_bus_bridge(struct pci_host_bridge *bridge);
1035 struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
1037 struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
1039 struct hotplug_slot *hotplug);
1040 void pci_destroy_slot(struct pci_slot *slot);
1042 void pci_dev_assign_slot(struct pci_dev *dev);
1044 static inline void pci_dev_assign_slot(struct pci_dev *dev) { }
1046 int pci_scan_slot(struct pci_bus *bus, int devfn);
1047 struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
1048 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
1049 unsigned int pci_scan_child_bus(struct pci_bus *bus);
1050 void pci_bus_add_device(struct pci_dev *dev);
1051 void pci_read_bridge_bases(struct pci_bus *child);
1052 struct resource *pci_find_parent_resource(const struct pci_dev *dev,
1053 struct resource *res);
1054 u8 pci_swizzle_interrupt_pin(const struct pci_dev *dev, u8 pin);
1055 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
1056 u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp);
1057 struct pci_dev *pci_dev_get(struct pci_dev *dev);
1058 void pci_dev_put(struct pci_dev *dev);
1059 void pci_remove_bus(struct pci_bus *b);
1060 void pci_stop_and_remove_bus_device(struct pci_dev *dev);
1061 void pci_stop_and_remove_bus_device_locked(struct pci_dev *dev);
1062 void pci_stop_root_bus(struct pci_bus *bus);
1063 void pci_remove_root_bus(struct pci_bus *bus);
1064 void pci_setup_cardbus(struct pci_bus *bus);
1065 void pcibios_setup_bridge(struct pci_bus *bus, unsigned long type);
1066 void pci_sort_breadthfirst(void);
1067 #define dev_is_pci(d) ((d)->bus == &pci_bus_type)
1068 #define dev_is_pf(d) ((dev_is_pci(d) ? to_pci_dev(d)->is_physfn : false))
1070 /* Generic PCI functions exported to card drivers */
1072 u8 pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
1073 u8 pci_find_capability(struct pci_dev *dev, int cap);
1074 u8 pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
1075 u8 pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
1076 u8 pci_find_next_ht_capability(struct pci_dev *dev, u8 pos, int ht_cap);
1077 u16 pci_find_ext_capability(struct pci_dev *dev, int cap);
1078 u16 pci_find_next_ext_capability(struct pci_dev *dev, u16 pos, int cap);
1079 struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
1080 u16 pci_find_vsec_capability(struct pci_dev *dev, u16 vendor, int cap);
1082 u64 pci_get_dsn(struct pci_dev *dev);
1084 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
1085 struct pci_dev *from);
1086 struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
1087 unsigned int ss_vendor, unsigned int ss_device,
1088 struct pci_dev *from);
1089 struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
1090 struct pci_dev *pci_get_domain_bus_and_slot(int domain, unsigned int bus,
1091 unsigned int devfn);
1092 struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
1093 int pci_dev_present(const struct pci_device_id *ids);
1095 int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn,
1096 int where, u8 *val);
1097 int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn,
1098 int where, u16 *val);
1099 int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn,
1100 int where, u32 *val);
1101 int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
1103 int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn,
1104 int where, u16 val);
1105 int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,
1106 int where, u32 val);
1108 int pci_generic_config_read(struct pci_bus *bus, unsigned int devfn,
1109 int where, int size, u32 *val);
1110 int pci_generic_config_write(struct pci_bus *bus, unsigned int devfn,
1111 int where, int size, u32 val);
1112 int pci_generic_config_read32(struct pci_bus *bus, unsigned int devfn,
1113 int where, int size, u32 *val);
1114 int pci_generic_config_write32(struct pci_bus *bus, unsigned int devfn,
1115 int where, int size, u32 val);
1117 struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops);
1119 int pci_read_config_byte(const struct pci_dev *dev, int where, u8 *val);
1120 int pci_read_config_word(const struct pci_dev *dev, int where, u16 *val);
1121 int pci_read_config_dword(const struct pci_dev *dev, int where, u32 *val);
1122 int pci_write_config_byte(const struct pci_dev *dev, int where, u8 val);
1123 int pci_write_config_word(const struct pci_dev *dev, int where, u16 val);
1124 int pci_write_config_dword(const struct pci_dev *dev, int where, u32 val);
1126 int pcie_capability_read_word(struct pci_dev *dev, int pos, u16 *val);
1127 int pcie_capability_read_dword(struct pci_dev *dev, int pos, u32 *val);
1128 int pcie_capability_write_word(struct pci_dev *dev, int pos, u16 val);
1129 int pcie_capability_write_dword(struct pci_dev *dev, int pos, u32 val);
1130 int pcie_capability_clear_and_set_word(struct pci_dev *dev, int pos,
1131 u16 clear, u16 set);
1132 int pcie_capability_clear_and_set_dword(struct pci_dev *dev, int pos,
1133 u32 clear, u32 set);
1135 static inline int pcie_capability_set_word(struct pci_dev *dev, int pos,
1138 return pcie_capability_clear_and_set_word(dev, pos, 0, set);
1141 static inline int pcie_capability_set_dword(struct pci_dev *dev, int pos,
1144 return pcie_capability_clear_and_set_dword(dev, pos, 0, set);
1147 static inline int pcie_capability_clear_word(struct pci_dev *dev, int pos,
1150 return pcie_capability_clear_and_set_word(dev, pos, clear, 0);
1153 static inline int pcie_capability_clear_dword(struct pci_dev *dev, int pos,
1156 return pcie_capability_clear_and_set_dword(dev, pos, clear, 0);
1159 /* User-space driven config access */
1160 int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val);
1161 int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val);
1162 int pci_user_read_config_dword(struct pci_dev *dev, int where, u32 *val);
1163 int pci_user_write_config_byte(struct pci_dev *dev, int where, u8 val);
1164 int pci_user_write_config_word(struct pci_dev *dev, int where, u16 val);
1165 int pci_user_write_config_dword(struct pci_dev *dev, int where, u32 val);
1167 int __must_check pci_enable_device(struct pci_dev *dev);
1168 int __must_check pci_enable_device_io(struct pci_dev *dev);
1169 int __must_check pci_enable_device_mem(struct pci_dev *dev);
1170 int __must_check pci_reenable_device(struct pci_dev *);
1171 int __must_check pcim_enable_device(struct pci_dev *pdev);
1172 void pcim_pin_device(struct pci_dev *pdev);
1174 static inline bool pci_intx_mask_supported(struct pci_dev *pdev)
1177 * INTx masking is supported if PCI_COMMAND_INTX_DISABLE is
1178 * writable and no quirk has marked the feature broken.
1180 return !pdev->broken_intx_masking;
1183 static inline int pci_is_enabled(struct pci_dev *pdev)
1185 return (atomic_read(&pdev->enable_cnt) > 0);
1188 static inline int pci_is_managed(struct pci_dev *pdev)
1190 return pdev->is_managed;
1193 void pci_disable_device(struct pci_dev *dev);
1195 extern unsigned int pcibios_max_latency;
1196 void pci_set_master(struct pci_dev *dev);
1197 void pci_clear_master(struct pci_dev *dev);
1199 int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
1200 int pci_set_cacheline_size(struct pci_dev *dev);
1201 int __must_check pci_set_mwi(struct pci_dev *dev);
1202 int __must_check pcim_set_mwi(struct pci_dev *dev);
1203 int pci_try_set_mwi(struct pci_dev *dev);
1204 void pci_clear_mwi(struct pci_dev *dev);
1205 void pci_intx(struct pci_dev *dev, int enable);
1206 bool pci_check_and_mask_intx(struct pci_dev *dev);
1207 bool pci_check_and_unmask_intx(struct pci_dev *dev);
1208 int pci_wait_for_pending(struct pci_dev *dev, int pos, u16 mask);
1209 int pci_wait_for_pending_transaction(struct pci_dev *dev);
1210 int pcix_get_max_mmrbc(struct pci_dev *dev);
1211 int pcix_get_mmrbc(struct pci_dev *dev);
1212 int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
1213 int pcie_get_readrq(struct pci_dev *dev);
1214 int pcie_set_readrq(struct pci_dev *dev, int rq);
1215 int pcie_get_mps(struct pci_dev *dev);
1216 int pcie_set_mps(struct pci_dev *dev, int mps);
1217 u32 pcie_bandwidth_available(struct pci_dev *dev, struct pci_dev **limiting_dev,
1218 enum pci_bus_speed *speed,
1219 enum pcie_link_width *width);
1220 void pcie_print_link_status(struct pci_dev *dev);
1221 bool pcie_has_flr(struct pci_dev *dev);
1222 int pcie_flr(struct pci_dev *dev);
1223 int __pci_reset_function_locked(struct pci_dev *dev);
1224 int pci_reset_function(struct pci_dev *dev);
1225 int pci_reset_function_locked(struct pci_dev *dev);
1226 int pci_try_reset_function(struct pci_dev *dev);
1227 int pci_probe_reset_slot(struct pci_slot *slot);
1228 int pci_probe_reset_bus(struct pci_bus *bus);
1229 int pci_reset_bus(struct pci_dev *dev);
1230 void pci_reset_secondary_bus(struct pci_dev *dev);
1231 void pcibios_reset_secondary_bus(struct pci_dev *dev);
1232 void pci_update_resource(struct pci_dev *dev, int resno);
1233 int __must_check pci_assign_resource(struct pci_dev *dev, int i);
1234 int __must_check pci_reassign_resource(struct pci_dev *dev, int i, resource_size_t add_size, resource_size_t align);
1235 void pci_release_resource(struct pci_dev *dev, int resno);
1236 static inline int pci_rebar_bytes_to_size(u64 bytes)
1238 bytes = roundup_pow_of_two(bytes);
1240 /* Return BAR size as defined in the resizable BAR specification */
1241 return max(ilog2(bytes), 20) - 20;
1244 u32 pci_rebar_get_possible_sizes(struct pci_dev *pdev, int bar);
1245 int __must_check pci_resize_resource(struct pci_dev *dev, int i, int size);
1246 int pci_select_bars(struct pci_dev *dev, unsigned long flags);
1247 bool pci_device_is_present(struct pci_dev *pdev);
1248 void pci_ignore_hotplug(struct pci_dev *dev);
1249 struct pci_dev *pci_real_dma_dev(struct pci_dev *dev);
1250 int pci_status_get_and_clear_errors(struct pci_dev *pdev);
1252 int __printf(6, 7) pci_request_irq(struct pci_dev *dev, unsigned int nr,
1253 irq_handler_t handler, irq_handler_t thread_fn, void *dev_id,
1254 const char *fmt, ...);
1255 void pci_free_irq(struct pci_dev *dev, unsigned int nr, void *dev_id);
1257 /* ROM control related routines */
1258 int pci_enable_rom(struct pci_dev *pdev);
1259 void pci_disable_rom(struct pci_dev *pdev);
1260 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
1261 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
1263 /* Power management related routines */
1264 int pci_save_state(struct pci_dev *dev);
1265 void pci_restore_state(struct pci_dev *dev);
1266 struct pci_saved_state *pci_store_saved_state(struct pci_dev *dev);
1267 int pci_load_saved_state(struct pci_dev *dev,
1268 struct pci_saved_state *state);
1269 int pci_load_and_free_saved_state(struct pci_dev *dev,
1270 struct pci_saved_state **state);
1271 struct pci_cap_saved_state *pci_find_saved_cap(struct pci_dev *dev, char cap);
1272 struct pci_cap_saved_state *pci_find_saved_ext_cap(struct pci_dev *dev,
1274 int pci_add_cap_save_buffer(struct pci_dev *dev, char cap, unsigned int size);
1275 int pci_add_ext_cap_save_buffer(struct pci_dev *dev,
1276 u16 cap, unsigned int size);
1277 int pci_platform_power_transition(struct pci_dev *dev, pci_power_t state);
1278 int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
1279 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
1280 bool pci_pme_capable(struct pci_dev *dev, pci_power_t state);
1281 void pci_pme_active(struct pci_dev *dev, bool enable);
1282 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable);
1283 int pci_wake_from_d3(struct pci_dev *dev, bool enable);
1284 int pci_prepare_to_sleep(struct pci_dev *dev);
1285 int pci_back_from_sleep(struct pci_dev *dev);
1286 bool pci_dev_run_wake(struct pci_dev *dev);
1287 void pci_d3cold_enable(struct pci_dev *dev);
1288 void pci_d3cold_disable(struct pci_dev *dev);
1289 bool pcie_relaxed_ordering_enabled(struct pci_dev *dev);
1290 void pci_resume_bus(struct pci_bus *bus);
1291 void pci_bus_set_current_state(struct pci_bus *bus, pci_power_t state);
1293 /* For use by arch with custom probe code */
1294 void set_pcie_port_type(struct pci_dev *pdev);
1295 void set_pcie_hotplug_bridge(struct pci_dev *pdev);
1297 /* Functions for PCI Hotplug drivers to use */
1298 unsigned int pci_rescan_bus_bridge_resize(struct pci_dev *bridge);
1299 unsigned int pci_rescan_bus(struct pci_bus *bus);
1300 void pci_lock_rescan_remove(void);
1301 void pci_unlock_rescan_remove(void);
1303 /* Vital Product Data routines */
1304 ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
1305 ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
1306 int pci_set_vpd_size(struct pci_dev *dev, size_t len);
1308 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
1309 resource_size_t pcibios_retrieve_fw_addr(struct pci_dev *dev, int idx);
1310 void pci_bus_assign_resources(const struct pci_bus *bus);
1311 void pci_bus_claim_resources(struct pci_bus *bus);
1312 void pci_bus_size_bridges(struct pci_bus *bus);
1313 int pci_claim_resource(struct pci_dev *, int);
1314 int pci_claim_bridge_resource(struct pci_dev *bridge, int i);
1315 void pci_assign_unassigned_resources(void);
1316 void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge);
1317 void pci_assign_unassigned_bus_resources(struct pci_bus *bus);
1318 void pci_assign_unassigned_root_bus_resources(struct pci_bus *bus);
1319 int pci_reassign_bridge_resources(struct pci_dev *bridge, unsigned long type);
1320 void pdev_enable_device(struct pci_dev *);
1321 int pci_enable_resources(struct pci_dev *, int mask);
1322 void pci_assign_irq(struct pci_dev *dev);
1323 struct resource *pci_find_resource(struct pci_dev *dev, struct resource *res);
1324 #define HAVE_PCI_REQ_REGIONS 2
1325 int __must_check pci_request_regions(struct pci_dev *, const char *);
1326 int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *);
1327 void pci_release_regions(struct pci_dev *);
1328 int __must_check pci_request_region(struct pci_dev *, int, const char *);
1329 void pci_release_region(struct pci_dev *, int);
1330 int pci_request_selected_regions(struct pci_dev *, int, const char *);
1331 int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *);
1332 void pci_release_selected_regions(struct pci_dev *, int);
1334 /* drivers/pci/bus.c */
1335 void pci_add_resource(struct list_head *resources, struct resource *res);
1336 void pci_add_resource_offset(struct list_head *resources, struct resource *res,
1337 resource_size_t offset);
1338 void pci_free_resource_list(struct list_head *resources);
1339 void pci_bus_add_resource(struct pci_bus *bus, struct resource *res,
1340 unsigned int flags);
1341 struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n);
1342 void pci_bus_remove_resources(struct pci_bus *bus);
1343 int devm_request_pci_bus_resources(struct device *dev,
1344 struct list_head *resources);
1346 /* Temporary until new and working PCI SBR API in place */
1347 int pci_bridge_secondary_bus_reset(struct pci_dev *dev);
1349 #define pci_bus_for_each_resource(bus, res, i) \
1351 (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \
1354 int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
1355 struct resource *res, resource_size_t size,
1356 resource_size_t align, resource_size_t min,
1357 unsigned long type_mask,
1358 resource_size_t (*alignf)(void *,
1359 const struct resource *,
1365 int pci_register_io_range(struct fwnode_handle *fwnode, phys_addr_t addr,
1366 resource_size_t size);
1367 unsigned long pci_address_to_pio(phys_addr_t addr);
1368 phys_addr_t pci_pio_to_address(unsigned long pio);
1369 int pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr);
1370 int devm_pci_remap_iospace(struct device *dev, const struct resource *res,
1371 phys_addr_t phys_addr);
1372 void pci_unmap_iospace(struct resource *res);
1373 void __iomem *devm_pci_remap_cfgspace(struct device *dev,
1374 resource_size_t offset,
1375 resource_size_t size);
1376 void __iomem *devm_pci_remap_cfg_resource(struct device *dev,
1377 struct resource *res);
1379 static inline pci_bus_addr_t pci_bus_address(struct pci_dev *pdev, int bar)
1381 struct pci_bus_region region;
1383 pcibios_resource_to_bus(pdev->bus, ®ion, &pdev->resource[bar]);
1384 return region.start;
1387 /* Proper probing supporting hot-pluggable devices */
1388 int __must_check __pci_register_driver(struct pci_driver *, struct module *,
1389 const char *mod_name);
1391 /* pci_register_driver() must be a macro so KBUILD_MODNAME can be expanded */
1392 #define pci_register_driver(driver) \
1393 __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
1395 void pci_unregister_driver(struct pci_driver *dev);
1398 * module_pci_driver() - Helper macro for registering a PCI driver
1399 * @__pci_driver: pci_driver struct
1401 * Helper macro for PCI drivers which do not do anything special in module
1402 * init/exit. This eliminates a lot of boilerplate. Each module may only
1403 * use this macro once, and calling it replaces module_init() and module_exit()
1405 #define module_pci_driver(__pci_driver) \
1406 module_driver(__pci_driver, pci_register_driver, pci_unregister_driver)
1409 * builtin_pci_driver() - Helper macro for registering a PCI driver
1410 * @__pci_driver: pci_driver struct
1412 * Helper macro for PCI drivers which do not do anything special in their
1413 * init code. This eliminates a lot of boilerplate. Each driver may only
1414 * use this macro once, and calling it replaces device_initcall(...)
1416 #define builtin_pci_driver(__pci_driver) \
1417 builtin_driver(__pci_driver, pci_register_driver)
1419 struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
1420 int pci_add_dynid(struct pci_driver *drv,
1421 unsigned int vendor, unsigned int device,
1422 unsigned int subvendor, unsigned int subdevice,
1423 unsigned int class, unsigned int class_mask,
1424 unsigned long driver_data);
1425 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
1426 struct pci_dev *dev);
1427 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
1430 void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
1432 int pci_cfg_space_size(struct pci_dev *dev);
1433 unsigned char pci_bus_max_busnr(struct pci_bus *bus);
1434 void pci_setup_bridge(struct pci_bus *bus);
1435 resource_size_t pcibios_window_alignment(struct pci_bus *bus,
1436 unsigned long type);
1438 #define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0)
1439 #define PCI_VGA_STATE_CHANGE_DECODES (1 << 1)
1441 int pci_set_vga_state(struct pci_dev *pdev, bool decode,
1442 unsigned int command_bits, u32 flags);
1445 * Virtual interrupts allow for more interrupts to be allocated
1446 * than the device has interrupts for. These are not programmed
1447 * into the device's MSI-X table and must be handled by some
1448 * other driver means.
1450 #define PCI_IRQ_VIRTUAL (1 << 4)
1452 #define PCI_IRQ_ALL_TYPES \
1453 (PCI_IRQ_LEGACY | PCI_IRQ_MSI | PCI_IRQ_MSIX)
1455 /* kmem_cache style wrapper around pci_alloc_consistent() */
1457 #include <linux/dmapool.h>
1459 #define pci_pool dma_pool
1460 #define pci_pool_create(name, pdev, size, align, allocation) \
1461 dma_pool_create(name, &pdev->dev, size, align, allocation)
1462 #define pci_pool_destroy(pool) dma_pool_destroy(pool)
1463 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
1464 #define pci_pool_zalloc(pool, flags, handle) \
1465 dma_pool_zalloc(pool, flags, handle)
1466 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
1469 u32 vector; /* Kernel uses to write allocated vector */
1470 u16 entry; /* Driver uses to specify entry, OS writes */
1473 #ifdef CONFIG_PCI_MSI
1474 int pci_msi_vec_count(struct pci_dev *dev);
1475 void pci_disable_msi(struct pci_dev *dev);
1476 int pci_msix_vec_count(struct pci_dev *dev);
1477 void pci_disable_msix(struct pci_dev *dev);
1478 void pci_restore_msi_state(struct pci_dev *dev);
1479 int pci_msi_enabled(void);
1480 int pci_enable_msi(struct pci_dev *dev);
1481 int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries,
1482 int minvec, int maxvec);
1483 static inline int pci_enable_msix_exact(struct pci_dev *dev,
1484 struct msix_entry *entries, int nvec)
1486 int rc = pci_enable_msix_range(dev, entries, nvec, nvec);
1491 int pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
1492 unsigned int max_vecs, unsigned int flags,
1493 struct irq_affinity *affd);
1495 void pci_free_irq_vectors(struct pci_dev *dev);
1496 int pci_irq_vector(struct pci_dev *dev, unsigned int nr);
1497 const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev, int vec);
1500 static inline int pci_msi_vec_count(struct pci_dev *dev) { return -ENOSYS; }
1501 static inline void pci_disable_msi(struct pci_dev *dev) { }
1502 static inline int pci_msix_vec_count(struct pci_dev *dev) { return -ENOSYS; }
1503 static inline void pci_disable_msix(struct pci_dev *dev) { }
1504 static inline void pci_restore_msi_state(struct pci_dev *dev) { }
1505 static inline int pci_msi_enabled(void) { return 0; }
1506 static inline int pci_enable_msi(struct pci_dev *dev)
1508 static inline int pci_enable_msix_range(struct pci_dev *dev,
1509 struct msix_entry *entries, int minvec, int maxvec)
1511 static inline int pci_enable_msix_exact(struct pci_dev *dev,
1512 struct msix_entry *entries, int nvec)
1516 pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
1517 unsigned int max_vecs, unsigned int flags,
1518 struct irq_affinity *aff_desc)
1520 if ((flags & PCI_IRQ_LEGACY) && min_vecs == 1 && dev->irq)
1525 static inline void pci_free_irq_vectors(struct pci_dev *dev)
1529 static inline int pci_irq_vector(struct pci_dev *dev, unsigned int nr)
1531 if (WARN_ON_ONCE(nr > 0))
1535 static inline const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev,
1538 return cpu_possible_mask;
1543 * pci_irqd_intx_xlate() - Translate PCI INTx value to an IRQ domain hwirq
1544 * @d: the INTx IRQ domain
1545 * @node: the DT node for the device whose interrupt we're translating
1546 * @intspec: the interrupt specifier data from the DT
1547 * @intsize: the number of entries in @intspec
1548 * @out_hwirq: pointer at which to write the hwirq number
1549 * @out_type: pointer at which to write the interrupt type
1551 * Translate a PCI INTx interrupt number from device tree in the range 1-4, as
1552 * stored in the standard PCI_INTERRUPT_PIN register, to a value in the range
1553 * 0-3 suitable for use in a 4 entry IRQ domain. That is, subtract one from the
1554 * INTx value to obtain the hwirq number.
1556 * Returns 0 on success, or -EINVAL if the interrupt specifier is out of range.
1558 static inline int pci_irqd_intx_xlate(struct irq_domain *d,
1559 struct device_node *node,
1561 unsigned int intsize,
1562 unsigned long *out_hwirq,
1563 unsigned int *out_type)
1565 const u32 intx = intspec[0];
1567 if (intx < PCI_INTERRUPT_INTA || intx > PCI_INTERRUPT_INTD)
1570 *out_hwirq = intx - PCI_INTERRUPT_INTA;
1574 #ifdef CONFIG_PCIEPORTBUS
1575 extern bool pcie_ports_disabled;
1576 extern bool pcie_ports_native;
1578 #define pcie_ports_disabled true
1579 #define pcie_ports_native false
1582 #define PCIE_LINK_STATE_L0S BIT(0)
1583 #define PCIE_LINK_STATE_L1 BIT(1)
1584 #define PCIE_LINK_STATE_CLKPM BIT(2)
1585 #define PCIE_LINK_STATE_L1_1 BIT(3)
1586 #define PCIE_LINK_STATE_L1_2 BIT(4)
1587 #define PCIE_LINK_STATE_L1_1_PCIPM BIT(5)
1588 #define PCIE_LINK_STATE_L1_2_PCIPM BIT(6)
1590 #ifdef CONFIG_PCIEASPM
1591 int pci_disable_link_state(struct pci_dev *pdev, int state);
1592 int pci_disable_link_state_locked(struct pci_dev *pdev, int state);
1593 void pcie_no_aspm(void);
1594 bool pcie_aspm_support_enabled(void);
1595 bool pcie_aspm_enabled(struct pci_dev *pdev);
1597 static inline int pci_disable_link_state(struct pci_dev *pdev, int state)
1599 static inline int pci_disable_link_state_locked(struct pci_dev *pdev, int state)
1601 static inline void pcie_no_aspm(void) { }
1602 static inline bool pcie_aspm_support_enabled(void) { return false; }
1603 static inline bool pcie_aspm_enabled(struct pci_dev *pdev) { return false; }
1606 #ifdef CONFIG_PCIEAER
1607 bool pci_aer_available(void);
1609 static inline bool pci_aer_available(void) { return false; }
1612 bool pci_ats_disabled(void);
1614 void pci_cfg_access_lock(struct pci_dev *dev);
1615 bool pci_cfg_access_trylock(struct pci_dev *dev);
1616 void pci_cfg_access_unlock(struct pci_dev *dev);
1619 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
1620 * a PCI domain is defined to be a set of PCI buses which share
1621 * configuration space.
1623 #ifdef CONFIG_PCI_DOMAINS
1624 extern int pci_domains_supported;
1626 enum { pci_domains_supported = 0 };
1627 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
1628 static inline int pci_proc_domain(struct pci_bus *bus) { return 0; }
1629 #endif /* CONFIG_PCI_DOMAINS */
1632 * Generic implementation for PCI domain support. If your
1633 * architecture does not need custom management of PCI
1634 * domains then this implementation will be used
1636 #ifdef CONFIG_PCI_DOMAINS_GENERIC
1637 static inline int pci_domain_nr(struct pci_bus *bus)
1639 return bus->domain_nr;
1642 int acpi_pci_bus_find_domain_nr(struct pci_bus *bus);
1644 static inline int acpi_pci_bus_find_domain_nr(struct pci_bus *bus)
1647 int pci_bus_find_domain_nr(struct pci_bus *bus, struct device *parent);
1650 /* Some architectures require additional setup to direct VGA traffic */
1651 typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode,
1652 unsigned int command_bits, u32 flags);
1653 void pci_register_set_vga_state(arch_set_vga_state_t func);
1656 pci_request_io_regions(struct pci_dev *pdev, const char *name)
1658 return pci_request_selected_regions(pdev,
1659 pci_select_bars(pdev, IORESOURCE_IO), name);
1663 pci_release_io_regions(struct pci_dev *pdev)
1665 return pci_release_selected_regions(pdev,
1666 pci_select_bars(pdev, IORESOURCE_IO));
1670 pci_request_mem_regions(struct pci_dev *pdev, const char *name)
1672 return pci_request_selected_regions(pdev,
1673 pci_select_bars(pdev, IORESOURCE_MEM), name);
1677 pci_release_mem_regions(struct pci_dev *pdev)
1679 return pci_release_selected_regions(pdev,
1680 pci_select_bars(pdev, IORESOURCE_MEM));
1683 #else /* CONFIG_PCI is not enabled */
1685 static inline void pci_set_flags(int flags) { }
1686 static inline void pci_add_flags(int flags) { }
1687 static inline void pci_clear_flags(int flags) { }
1688 static inline int pci_has_flag(int flag) { return 0; }
1691 * If the system does not have PCI, clearly these return errors. Define
1692 * these as simple inline functions to avoid hair in drivers.
1694 #define _PCI_NOP(o, s, t) \
1695 static inline int pci_##o##_config_##s(struct pci_dev *dev, \
1697 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
1699 #define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
1700 _PCI_NOP(o, word, u16 x) \
1701 _PCI_NOP(o, dword, u32 x)
1702 _PCI_NOP_ALL(read, *)
1703 _PCI_NOP_ALL(write,)
1705 static inline struct pci_dev *pci_get_device(unsigned int vendor,
1706 unsigned int device,
1707 struct pci_dev *from)
1710 static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
1711 unsigned int device,
1712 unsigned int ss_vendor,
1713 unsigned int ss_device,
1714 struct pci_dev *from)
1717 static inline struct pci_dev *pci_get_class(unsigned int class,
1718 struct pci_dev *from)
1721 #define pci_dev_present(ids) (0)
1722 #define no_pci_devices() (1)
1723 #define pci_dev_put(dev) do { } while (0)
1725 static inline void pci_set_master(struct pci_dev *dev) { }
1726 static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; }
1727 static inline void pci_disable_device(struct pci_dev *dev) { }
1728 static inline int pcim_enable_device(struct pci_dev *pdev) { return -EIO; }
1729 static inline int pci_assign_resource(struct pci_dev *dev, int i)
1731 static inline int __pci_register_driver(struct pci_driver *drv,
1732 struct module *owner)
1734 static inline int pci_register_driver(struct pci_driver *drv)
1736 static inline void pci_unregister_driver(struct pci_driver *drv) { }
1737 static inline u8 pci_find_capability(struct pci_dev *dev, int cap)
1739 static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
1742 static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
1745 static inline u64 pci_get_dsn(struct pci_dev *dev)
1748 /* Power management related routines */
1749 static inline int pci_save_state(struct pci_dev *dev) { return 0; }
1750 static inline void pci_restore_state(struct pci_dev *dev) { }
1751 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
1753 static inline int pci_wake_from_d3(struct pci_dev *dev, bool enable)
1755 static inline pci_power_t pci_choose_state(struct pci_dev *dev,
1758 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
1762 static inline struct resource *pci_find_resource(struct pci_dev *dev,
1763 struct resource *res)
1765 static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
1767 static inline void pci_release_regions(struct pci_dev *dev) { }
1769 static inline unsigned long pci_address_to_pio(phys_addr_t addr) { return -1; }
1771 static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
1773 static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
1776 static inline struct pci_dev *pci_get_domain_bus_and_slot(int domain,
1777 unsigned int bus, unsigned int devfn)
1780 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
1781 static inline struct pci_dev *pci_dev_get(struct pci_dev *dev) { return NULL; }
1783 #define dev_is_pci(d) (false)
1784 #define dev_is_pf(d) (false)
1785 static inline bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags)
1787 static inline int pci_irqd_intx_xlate(struct irq_domain *d,
1788 struct device_node *node,
1790 unsigned int intsize,
1791 unsigned long *out_hwirq,
1792 unsigned int *out_type)
1795 static inline const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
1796 struct pci_dev *dev)
1798 static inline bool pci_ats_disabled(void) { return true; }
1800 static inline int pci_irq_vector(struct pci_dev *dev, unsigned int nr)
1806 pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
1807 unsigned int max_vecs, unsigned int flags,
1808 struct irq_affinity *aff_desc)
1812 #endif /* CONFIG_PCI */
1815 pci_alloc_irq_vectors(struct pci_dev *dev, unsigned int min_vecs,
1816 unsigned int max_vecs, unsigned int flags)
1818 return pci_alloc_irq_vectors_affinity(dev, min_vecs, max_vecs, flags,
1822 /* Include architecture-dependent settings and functions */
1824 #include <asm/pci.h>
1826 /* These two functions provide almost identical functionality. Depending
1827 * on the architecture, one will be implemented as a wrapper around the
1828 * other (in drivers/pci/mmap.c).
1830 * pci_mmap_resource_range() maps a specific BAR, and vm->vm_pgoff
1831 * is expected to be an offset within that region.
1833 * pci_mmap_page_range() is the legacy architecture-specific interface,
1834 * which accepts a "user visible" resource address converted by
1835 * pci_resource_to_user(), as used in the legacy mmap() interface in
1838 int pci_mmap_resource_range(struct pci_dev *dev, int bar,
1839 struct vm_area_struct *vma,
1840 enum pci_mmap_state mmap_state, int write_combine);
1841 int pci_mmap_page_range(struct pci_dev *pdev, int bar,
1842 struct vm_area_struct *vma,
1843 enum pci_mmap_state mmap_state, int write_combine);
1845 #ifndef arch_can_pci_mmap_wc
1846 #define arch_can_pci_mmap_wc() 0
1849 #ifndef arch_can_pci_mmap_io
1850 #define arch_can_pci_mmap_io() 0
1851 #define pci_iobar_pfn(pdev, bar, vma) (-EINVAL)
1853 int pci_iobar_pfn(struct pci_dev *pdev, int bar, struct vm_area_struct *vma);
1856 #ifndef pci_root_bus_fwnode
1857 #define pci_root_bus_fwnode(bus) NULL
1861 * These helpers provide future and backwards compatibility
1862 * for accessing popular PCI BAR info
1864 #define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
1865 #define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end)
1866 #define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags)
1867 #define pci_resource_len(dev,bar) \
1868 ((pci_resource_start((dev), (bar)) == 0 && \
1869 pci_resource_end((dev), (bar)) == \
1870 pci_resource_start((dev), (bar))) ? 0 : \
1872 (pci_resource_end((dev), (bar)) - \
1873 pci_resource_start((dev), (bar)) + 1))
1876 * Similar to the helpers above, these manipulate per-pci_dev
1877 * driver-specific data. They are really just a wrapper around
1878 * the generic device structure functions of these calls.
1880 static inline void *pci_get_drvdata(struct pci_dev *pdev)
1882 return dev_get_drvdata(&pdev->dev);
1885 static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
1887 dev_set_drvdata(&pdev->dev, data);
1890 static inline const char *pci_name(const struct pci_dev *pdev)
1892 return dev_name(&pdev->dev);
1895 void pci_resource_to_user(const struct pci_dev *dev, int bar,
1896 const struct resource *rsrc,
1897 resource_size_t *start, resource_size_t *end);
1900 * The world is not perfect and supplies us with broken PCI devices.
1901 * For at least a part of these bugs we need a work-around, so both
1902 * generic (drivers/pci/quirks.c) and per-architecture code can define
1903 * fixup hooks to be called for particular buggy devices.
1907 u16 vendor; /* Or PCI_ANY_ID */
1908 u16 device; /* Or PCI_ANY_ID */
1909 u32 class; /* Or PCI_ANY_ID */
1910 unsigned int class_shift; /* should be 0, 8, 16 */
1911 #ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
1914 void (*hook)(struct pci_dev *dev);
1918 enum pci_fixup_pass {
1919 pci_fixup_early, /* Before probing BARs */
1920 pci_fixup_header, /* After reading configuration header */
1921 pci_fixup_final, /* Final phase of device fixups */
1922 pci_fixup_enable, /* pci_enable_device() time */
1923 pci_fixup_resume, /* pci_device_resume() */
1924 pci_fixup_suspend, /* pci_device_suspend() */
1925 pci_fixup_resume_early, /* pci_device_resume_early() */
1926 pci_fixup_suspend_late, /* pci_device_suspend_late() */
1929 #ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
1930 #define ___DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1931 class_shift, hook) \
1932 __ADDRESSABLE(hook) \
1933 asm(".section " #sec ", \"a\" \n" \
1935 ".short " #vendor ", " #device " \n" \
1936 ".long " #class ", " #class_shift " \n" \
1937 ".long " #hook " - . \n" \
1941 * Clang's LTO may rename static functions in C, but has no way to
1942 * handle such renamings when referenced from inline asm. To work
1943 * around this, create global C stubs for these cases.
1945 #ifdef CONFIG_LTO_CLANG
1946 #define __DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1947 class_shift, hook, stub) \
1948 void stub(struct pci_dev *dev); \
1949 void stub(struct pci_dev *dev) \
1953 ___DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1956 #define __DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1957 class_shift, hook, stub) \
1958 ___DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1962 #define DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1963 class_shift, hook) \
1964 __DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1965 class_shift, hook, __UNIQUE_ID(hook))
1967 /* Anonymous variables would be nice... */
1968 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, class, \
1969 class_shift, hook) \
1970 static const struct pci_fixup __PASTE(__pci_fixup_##name,__LINE__) __used \
1971 __attribute__((__section__(#section), aligned((sizeof(void *))))) \
1972 = { vendor, device, class, class_shift, hook };
1975 #define DECLARE_PCI_FIXUP_CLASS_EARLY(vendor, device, class, \
1976 class_shift, hook) \
1977 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1978 hook, vendor, device, class, class_shift, hook)
1979 #define DECLARE_PCI_FIXUP_CLASS_HEADER(vendor, device, class, \
1980 class_shift, hook) \
1981 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1982 hook, vendor, device, class, class_shift, hook)
1983 #define DECLARE_PCI_FIXUP_CLASS_FINAL(vendor, device, class, \
1984 class_shift, hook) \
1985 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1986 hook, vendor, device, class, class_shift, hook)
1987 #define DECLARE_PCI_FIXUP_CLASS_ENABLE(vendor, device, class, \
1988 class_shift, hook) \
1989 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1990 hook, vendor, device, class, class_shift, hook)
1991 #define DECLARE_PCI_FIXUP_CLASS_RESUME(vendor, device, class, \
1992 class_shift, hook) \
1993 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1994 resume##hook, vendor, device, class, class_shift, hook)
1995 #define DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(vendor, device, class, \
1996 class_shift, hook) \
1997 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
1998 resume_early##hook, vendor, device, class, class_shift, hook)
1999 #define DECLARE_PCI_FIXUP_CLASS_SUSPEND(vendor, device, class, \
2000 class_shift, hook) \
2001 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
2002 suspend##hook, vendor, device, class, class_shift, hook)
2003 #define DECLARE_PCI_FIXUP_CLASS_SUSPEND_LATE(vendor, device, class, \
2004 class_shift, hook) \
2005 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \
2006 suspend_late##hook, vendor, device, class, class_shift, hook)
2008 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
2009 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
2010 hook, vendor, device, PCI_ANY_ID, 0, hook)
2011 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
2012 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
2013 hook, vendor, device, PCI_ANY_ID, 0, hook)
2014 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
2015 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
2016 hook, vendor, device, PCI_ANY_ID, 0, hook)
2017 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
2018 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
2019 hook, vendor, device, PCI_ANY_ID, 0, hook)
2020 #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
2021 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
2022 resume##hook, vendor, device, PCI_ANY_ID, 0, hook)
2023 #define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \
2024 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
2025 resume_early##hook, vendor, device, PCI_ANY_ID, 0, hook)
2026 #define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \
2027 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
2028 suspend##hook, vendor, device, PCI_ANY_ID, 0, hook)
2029 #define DECLARE_PCI_FIXUP_SUSPEND_LATE(vendor, device, hook) \
2030 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \
2031 suspend_late##hook, vendor, device, PCI_ANY_ID, 0, hook)
2033 #ifdef CONFIG_PCI_QUIRKS
2034 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
2036 static inline void pci_fixup_device(enum pci_fixup_pass pass,
2037 struct pci_dev *dev) { }
2040 void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
2041 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
2042 void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
2043 int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name);
2044 int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
2046 void pcim_iounmap_regions(struct pci_dev *pdev, int mask);
2048 extern int pci_pci_problems;
2049 #define PCIPCI_FAIL 1 /* No PCI PCI DMA */
2050 #define PCIPCI_TRITON 2
2051 #define PCIPCI_NATOMA 4
2052 #define PCIPCI_VIAETBF 8
2053 #define PCIPCI_VSFX 16
2054 #define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
2055 #define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
2057 extern unsigned long pci_cardbus_io_size;
2058 extern unsigned long pci_cardbus_mem_size;
2059 extern u8 pci_dfl_cache_line_size;
2060 extern u8 pci_cache_line_size;
2062 /* Architecture-specific versions may override these (weak) */
2063 void pcibios_disable_device(struct pci_dev *dev);
2064 void pcibios_set_master(struct pci_dev *dev);
2065 int pcibios_set_pcie_reset_state(struct pci_dev *dev,
2066 enum pcie_reset_state state);
2067 int pcibios_add_device(struct pci_dev *dev);
2068 void pcibios_release_device(struct pci_dev *dev);
2070 void pcibios_penalize_isa_irq(int irq, int active);
2072 static inline void pcibios_penalize_isa_irq(int irq, int active) {}
2074 int pcibios_alloc_irq(struct pci_dev *dev);
2075 void pcibios_free_irq(struct pci_dev *dev);
2076 resource_size_t pcibios_default_alignment(void);
2078 #if defined(CONFIG_PCI_MMCONFIG) || defined(CONFIG_ACPI_MCFG)
2079 void __init pci_mmcfg_early_init(void);
2080 void __init pci_mmcfg_late_init(void);
2082 static inline void pci_mmcfg_early_init(void) { }
2083 static inline void pci_mmcfg_late_init(void) { }
2086 int pci_ext_cfg_avail(void);
2088 void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
2089 void __iomem *pci_ioremap_wc_bar(struct pci_dev *pdev, int bar);
2091 #ifdef CONFIG_PCI_IOV
2092 int pci_iov_virtfn_bus(struct pci_dev *dev, int id);
2093 int pci_iov_virtfn_devfn(struct pci_dev *dev, int id);
2095 int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
2096 void pci_disable_sriov(struct pci_dev *dev);
2098 int pci_iov_sysfs_link(struct pci_dev *dev, struct pci_dev *virtfn, int id);
2099 int pci_iov_add_virtfn(struct pci_dev *dev, int id);
2100 void pci_iov_remove_virtfn(struct pci_dev *dev, int id);
2101 int pci_num_vf(struct pci_dev *dev);
2102 int pci_vfs_assigned(struct pci_dev *dev);
2103 int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs);
2104 int pci_sriov_get_totalvfs(struct pci_dev *dev);
2105 int pci_sriov_configure_simple(struct pci_dev *dev, int nr_virtfn);
2106 resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno);
2107 void pci_vf_drivers_autoprobe(struct pci_dev *dev, bool probe);
2109 /* Arch may override these (weak) */
2110 int pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs);
2111 int pcibios_sriov_disable(struct pci_dev *pdev);
2112 resource_size_t pcibios_iov_resource_alignment(struct pci_dev *dev, int resno);
2114 static inline int pci_iov_virtfn_bus(struct pci_dev *dev, int id)
2118 static inline int pci_iov_virtfn_devfn(struct pci_dev *dev, int id)
2122 static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
2125 static inline int pci_iov_sysfs_link(struct pci_dev *dev,
2126 struct pci_dev *virtfn, int id)
2130 static inline int pci_iov_add_virtfn(struct pci_dev *dev, int id)
2134 static inline void pci_iov_remove_virtfn(struct pci_dev *dev,
2136 static inline void pci_disable_sriov(struct pci_dev *dev) { }
2137 static inline int pci_num_vf(struct pci_dev *dev) { return 0; }
2138 static inline int pci_vfs_assigned(struct pci_dev *dev)
2140 static inline int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs)
2142 static inline int pci_sriov_get_totalvfs(struct pci_dev *dev)
2144 #define pci_sriov_configure_simple NULL
2145 static inline resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno)
2147 static inline void pci_vf_drivers_autoprobe(struct pci_dev *dev, bool probe) { }
2150 #if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE)
2151 void pci_hp_create_module_link(struct pci_slot *pci_slot);
2152 void pci_hp_remove_module_link(struct pci_slot *pci_slot);
2156 * pci_pcie_cap - get the saved PCIe capability offset
2159 * PCIe capability offset is calculated at PCI device initialization
2160 * time and saved in the data structure. This function returns saved
2161 * PCIe capability offset. Using this instead of pci_find_capability()
2162 * reduces unnecessary search in the PCI configuration space. If you
2163 * need to calculate PCIe capability offset from raw device for some
2164 * reasons, please use pci_find_capability() instead.
2166 static inline int pci_pcie_cap(struct pci_dev *dev)
2168 return dev->pcie_cap;
2172 * pci_is_pcie - check if the PCI device is PCI Express capable
2175 * Returns: true if the PCI device is PCI Express capable, false otherwise.
2177 static inline bool pci_is_pcie(struct pci_dev *dev)
2179 return pci_pcie_cap(dev);
2183 * pcie_caps_reg - get the PCIe Capabilities Register
2186 static inline u16 pcie_caps_reg(const struct pci_dev *dev)
2188 return dev->pcie_flags_reg;
2192 * pci_pcie_type - get the PCIe device/port type
2195 static inline int pci_pcie_type(const struct pci_dev *dev)
2197 return (pcie_caps_reg(dev) & PCI_EXP_FLAGS_TYPE) >> 4;
2201 * pcie_find_root_port - Get the PCIe root port device
2204 * Traverse up the parent chain and return the PCIe Root Port PCI Device
2205 * for a given PCI/PCIe Device.
2207 static inline struct pci_dev *pcie_find_root_port(struct pci_dev *dev)
2210 if (pci_is_pcie(dev) &&
2211 pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT)
2213 dev = pci_upstream_bridge(dev);
2219 void pci_request_acs(void);
2220 bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags);
2221 bool pci_acs_path_enabled(struct pci_dev *start,
2222 struct pci_dev *end, u16 acs_flags);
2223 int pci_enable_atomic_ops_to_root(struct pci_dev *dev, u32 cap_mask);
2225 #define PCI_VPD_LRDT 0x80 /* Large Resource Data Type */
2226 #define PCI_VPD_LRDT_ID(x) ((x) | PCI_VPD_LRDT)
2228 /* Large Resource Data Type Tag Item Names */
2229 #define PCI_VPD_LTIN_ID_STRING 0x02 /* Identifier String */
2230 #define PCI_VPD_LTIN_RO_DATA 0x10 /* Read-Only Data */
2231 #define PCI_VPD_LTIN_RW_DATA 0x11 /* Read-Write Data */
2233 #define PCI_VPD_LRDT_ID_STRING PCI_VPD_LRDT_ID(PCI_VPD_LTIN_ID_STRING)
2234 #define PCI_VPD_LRDT_RO_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RO_DATA)
2235 #define PCI_VPD_LRDT_RW_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RW_DATA)
2237 /* Small Resource Data Type Tag Item Names */
2238 #define PCI_VPD_STIN_END 0x0f /* End */
2240 #define PCI_VPD_SRDT_END (PCI_VPD_STIN_END << 3)
2242 #define PCI_VPD_SRDT_TIN_MASK 0x78
2243 #define PCI_VPD_SRDT_LEN_MASK 0x07
2244 #define PCI_VPD_LRDT_TIN_MASK 0x7f
2246 #define PCI_VPD_LRDT_TAG_SIZE 3
2247 #define PCI_VPD_SRDT_TAG_SIZE 1
2249 #define PCI_VPD_INFO_FLD_HDR_SIZE 3
2251 #define PCI_VPD_RO_KEYWORD_PARTNO "PN"
2252 #define PCI_VPD_RO_KEYWORD_SERIALNO "SN"
2253 #define PCI_VPD_RO_KEYWORD_MFR_ID "MN"
2254 #define PCI_VPD_RO_KEYWORD_VENDOR0 "V0"
2255 #define PCI_VPD_RO_KEYWORD_CHKSUM "RV"
2258 * pci_vpd_lrdt_size - Extracts the Large Resource Data Type length
2259 * @lrdt: Pointer to the beginning of the Large Resource Data Type tag
2261 * Returns the extracted Large Resource Data Type length.
2263 static inline u16 pci_vpd_lrdt_size(const u8 *lrdt)
2265 return (u16)lrdt[1] + ((u16)lrdt[2] << 8);
2269 * pci_vpd_lrdt_tag - Extracts the Large Resource Data Type Tag Item
2270 * @lrdt: Pointer to the beginning of the Large Resource Data Type tag
2272 * Returns the extracted Large Resource Data Type Tag item.
2274 static inline u16 pci_vpd_lrdt_tag(const u8 *lrdt)
2276 return (u16)(lrdt[0] & PCI_VPD_LRDT_TIN_MASK);
2280 * pci_vpd_srdt_size - Extracts the Small Resource Data Type length
2281 * @srdt: Pointer to the beginning of the Small Resource Data Type tag
2283 * Returns the extracted Small Resource Data Type length.
2285 static inline u8 pci_vpd_srdt_size(const u8 *srdt)
2287 return (*srdt) & PCI_VPD_SRDT_LEN_MASK;
2291 * pci_vpd_srdt_tag - Extracts the Small Resource Data Type Tag Item
2292 * @srdt: Pointer to the beginning of the Small Resource Data Type tag
2294 * Returns the extracted Small Resource Data Type Tag Item.
2296 static inline u8 pci_vpd_srdt_tag(const u8 *srdt)
2298 return ((*srdt) & PCI_VPD_SRDT_TIN_MASK) >> 3;
2302 * pci_vpd_info_field_size - Extracts the information field length
2303 * @info_field: Pointer to the beginning of an information field header
2305 * Returns the extracted information field length.
2307 static inline u8 pci_vpd_info_field_size(const u8 *info_field)
2309 return info_field[2];
2313 * pci_vpd_find_tag - Locates the Resource Data Type tag provided
2314 * @buf: Pointer to buffered vpd data
2315 * @off: The offset into the buffer at which to begin the search
2316 * @len: The length of the vpd buffer
2317 * @rdt: The Resource Data Type to search for
2319 * Returns the index where the Resource Data Type was found or
2320 * -ENOENT otherwise.
2322 int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt);
2325 * pci_vpd_find_info_keyword - Locates an information field keyword in the VPD
2326 * @buf: Pointer to buffered vpd data
2327 * @off: The offset into the buffer at which to begin the search
2328 * @len: The length of the buffer area, relative to off, in which to search
2329 * @kw: The keyword to search for
2331 * Returns the index where the information field keyword was found or
2332 * -ENOENT otherwise.
2334 int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off,
2335 unsigned int len, const char *kw);
2337 /* PCI <-> OF binding helpers */
2341 struct irq_domain *pci_host_bridge_of_msi_domain(struct pci_bus *bus);
2343 /* Arch may override this (weak) */
2344 struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus);
2346 #else /* CONFIG_OF */
2347 static inline struct irq_domain *
2348 pci_host_bridge_of_msi_domain(struct pci_bus *bus) { return NULL; }
2349 #endif /* CONFIG_OF */
2351 static inline struct device_node *
2352 pci_device_to_OF_node(const struct pci_dev *pdev)
2354 return pdev ? pdev->dev.of_node : NULL;
2357 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
2359 return bus ? bus->dev.of_node : NULL;
2363 struct irq_domain *pci_host_bridge_acpi_msi_domain(struct pci_bus *bus);
2366 pci_msi_register_fwnode_provider(struct fwnode_handle *(*fn)(struct device *));
2367 bool pci_pr3_present(struct pci_dev *pdev);
2369 static inline struct irq_domain *
2370 pci_host_bridge_acpi_msi_domain(struct pci_bus *bus) { return NULL; }
2371 static inline bool pci_pr3_present(struct pci_dev *pdev) { return false; }
2375 static inline struct eeh_dev *pci_dev_to_eeh_dev(struct pci_dev *pdev)
2377 return pdev->dev.archdata.edev;
2381 void pci_add_dma_alias(struct pci_dev *dev, u8 devfn_from, unsigned nr_devfns);
2382 bool pci_devs_are_dma_aliases(struct pci_dev *dev1, struct pci_dev *dev2);
2383 int pci_for_each_dma_alias(struct pci_dev *pdev,
2384 int (*fn)(struct pci_dev *pdev,
2385 u16 alias, void *data), void *data);
2387 /* Helper functions for operation of device flag */
2388 static inline void pci_set_dev_assigned(struct pci_dev *pdev)
2390 pdev->dev_flags |= PCI_DEV_FLAGS_ASSIGNED;
2392 static inline void pci_clear_dev_assigned(struct pci_dev *pdev)
2394 pdev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED;
2396 static inline bool pci_is_dev_assigned(struct pci_dev *pdev)
2398 return (pdev->dev_flags & PCI_DEV_FLAGS_ASSIGNED) == PCI_DEV_FLAGS_ASSIGNED;
2402 * pci_ari_enabled - query ARI forwarding status
2405 * Returns true if ARI forwarding is enabled.
2407 static inline bool pci_ari_enabled(struct pci_bus *bus)
2409 return bus->self && bus->self->ari_enabled;
2413 * pci_is_thunderbolt_attached - whether device is on a Thunderbolt daisy chain
2414 * @pdev: PCI device to check
2416 * Walk upwards from @pdev and check for each encountered bridge if it's part
2417 * of a Thunderbolt controller. Reaching the host bridge means @pdev is not
2418 * Thunderbolt-attached. (But rather soldered to the mainboard usually.)
2420 static inline bool pci_is_thunderbolt_attached(struct pci_dev *pdev)
2422 struct pci_dev *parent = pdev;
2424 if (pdev->is_thunderbolt)
2427 while ((parent = pci_upstream_bridge(parent)))
2428 if (parent->is_thunderbolt)
2434 #if defined(CONFIG_PCIEPORTBUS) || defined(CONFIG_EEH)
2435 void pci_uevent_ers(struct pci_dev *pdev, enum pci_ers_result err_type);
2438 /* Provide the legacy pci_dma_* API */
2439 #include <linux/pci-dma-compat.h>
2441 #define pci_printk(level, pdev, fmt, arg...) \
2442 dev_printk(level, &(pdev)->dev, fmt, ##arg)
2444 #define pci_emerg(pdev, fmt, arg...) dev_emerg(&(pdev)->dev, fmt, ##arg)
2445 #define pci_alert(pdev, fmt, arg...) dev_alert(&(pdev)->dev, fmt, ##arg)
2446 #define pci_crit(pdev, fmt, arg...) dev_crit(&(pdev)->dev, fmt, ##arg)
2447 #define pci_err(pdev, fmt, arg...) dev_err(&(pdev)->dev, fmt, ##arg)
2448 #define pci_warn(pdev, fmt, arg...) dev_warn(&(pdev)->dev, fmt, ##arg)
2449 #define pci_notice(pdev, fmt, arg...) dev_notice(&(pdev)->dev, fmt, ##arg)
2450 #define pci_info(pdev, fmt, arg...) dev_info(&(pdev)->dev, fmt, ##arg)
2451 #define pci_dbg(pdev, fmt, arg...) dev_dbg(&(pdev)->dev, fmt, ##arg)
2453 #define pci_notice_ratelimited(pdev, fmt, arg...) \
2454 dev_notice_ratelimited(&(pdev)->dev, fmt, ##arg)
2456 #define pci_info_ratelimited(pdev, fmt, arg...) \
2457 dev_info_ratelimited(&(pdev)->dev, fmt, ##arg)
2459 #define pci_WARN(pdev, condition, fmt, arg...) \
2460 WARN(condition, "%s %s: " fmt, \
2461 dev_driver_string(&(pdev)->dev), pci_name(pdev), ##arg)
2463 #define pci_WARN_ONCE(pdev, condition, fmt, arg...) \
2464 WARN_ONCE(condition, "%s %s: " fmt, \
2465 dev_driver_string(&(pdev)->dev), pci_name(pdev), ##arg)
2467 #endif /* LINUX_PCI_H */