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);
292 struct pcie_link_state;
298 /* The pci_dev structure describes PCI devices */
300 struct list_head bus_list; /* Node in per-bus list */
301 struct pci_bus *bus; /* Bus this device is on */
302 struct pci_bus *subordinate; /* Bus this device bridges to */
304 void *sysdata; /* Hook for sys-specific extension */
305 struct proc_dir_entry *procent; /* Device entry in /proc/bus/pci */
306 struct pci_slot *slot; /* Physical slot this device is in */
308 unsigned int devfn; /* Encoded device & function index */
309 unsigned short vendor;
310 unsigned short device;
311 unsigned short subsystem_vendor;
312 unsigned short subsystem_device;
313 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
314 u8 revision; /* PCI revision, low byte of class word */
315 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
316 #ifdef CONFIG_PCIEAER
317 u16 aer_cap; /* AER capability offset */
318 struct aer_stats *aer_stats; /* AER stats for this device */
320 #ifdef CONFIG_PCIEPORTBUS
321 struct rcec_ea *rcec_ea; /* RCEC cached endpoint association */
322 struct pci_dev *rcec; /* Associated RCEC device */
324 u8 pcie_cap; /* PCIe capability offset */
325 u8 msi_cap; /* MSI capability offset */
326 u8 msix_cap; /* MSI-X capability offset */
327 u8 pcie_mpss:3; /* PCIe Max Payload Size Supported */
328 u8 rom_base_reg; /* Config register controlling ROM */
329 u8 pin; /* Interrupt pin this device uses */
330 u16 pcie_flags_reg; /* Cached PCIe Capabilities Register */
331 unsigned long *dma_alias_mask;/* Mask of enabled devfn aliases */
333 struct pci_driver *driver; /* Driver bound to this device */
334 u64 dma_mask; /* Mask of the bits of bus address this
335 device implements. Normally this is
336 0xffffffff. You only need to change
337 this if your device has broken DMA
338 or supports 64-bit transfers. */
340 struct device_dma_parameters dma_parms;
342 pci_power_t current_state; /* Current operating state. In ACPI,
343 this is D0-D3, D0 being fully
344 functional, and D3 being off. */
345 unsigned int imm_ready:1; /* Supports Immediate Readiness */
346 u8 pm_cap; /* PM capability offset */
347 unsigned int pme_support:5; /* Bitmask of states from which PME#
349 unsigned int pme_poll:1; /* Poll device's PME status bit */
350 unsigned int d1_support:1; /* Low power state D1 is supported */
351 unsigned int d2_support:1; /* Low power state D2 is supported */
352 unsigned int no_d1d2:1; /* D1 and D2 are forbidden */
353 unsigned int no_d3cold:1; /* D3cold is forbidden */
354 unsigned int bridge_d3:1; /* Allow D3 for bridge */
355 unsigned int d3cold_allowed:1; /* D3cold is allowed by user */
356 unsigned int mmio_always_on:1; /* Disallow turning off io/mem
357 decoding during BAR sizing */
358 unsigned int wakeup_prepared:1;
359 unsigned int runtime_d3cold:1; /* Whether go through runtime
360 D3cold, not set for devices
361 powered on/off by the
362 corresponding bridge */
363 unsigned int skip_bus_pm:1; /* Internal: Skip bus-level PM */
364 unsigned int ignore_hotplug:1; /* Ignore hotplug events */
365 unsigned int hotplug_user_indicators:1; /* SlotCtl indicators
366 controlled exclusively by
368 unsigned int clear_retrain_link:1; /* Need to clear Retrain Link
370 unsigned int d3hot_delay; /* D3hot->D0 transition time in ms */
371 unsigned int d3cold_delay; /* D3cold->D0 transition time in ms */
373 #ifdef CONFIG_PCIEASPM
374 struct pcie_link_state *link_state; /* ASPM link state */
375 unsigned int ltr_path:1; /* Latency Tolerance Reporting
376 supported from root to here */
377 u16 l1ss; /* L1SS Capability pointer */
379 unsigned int eetlp_prefix_path:1; /* End-to-End TLP Prefix */
381 pci_channel_state_t error_state; /* Current connectivity state */
382 struct device dev; /* Generic device interface */
384 int cfg_size; /* Size of config space */
387 * Instead of touching interrupt line and base address registers
388 * directly, use the values stored here. They might be different!
391 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
393 bool match_driver; /* Skip attaching driver */
395 unsigned int transparent:1; /* Subtractive decode bridge */
396 unsigned int io_window:1; /* Bridge has I/O window */
397 unsigned int pref_window:1; /* Bridge has pref mem window */
398 unsigned int pref_64_window:1; /* Pref mem window is 64-bit */
399 unsigned int multifunction:1; /* Multi-function device */
401 unsigned int is_busmaster:1; /* Is busmaster */
402 unsigned int no_msi:1; /* May not use MSI */
403 unsigned int no_64bit_msi:1; /* May only use 32-bit MSIs */
404 unsigned int block_cfg_access:1; /* Config space access blocked */
405 unsigned int broken_parity_status:1; /* Generates false positive parity */
406 unsigned int irq_reroute_variant:2; /* Needs IRQ rerouting variant */
407 unsigned int msi_enabled:1;
408 unsigned int msix_enabled:1;
409 unsigned int ari_enabled:1; /* ARI forwarding */
410 unsigned int ats_enabled:1; /* Address Translation Svc */
411 unsigned int pasid_enabled:1; /* Process Address Space ID */
412 unsigned int pri_enabled:1; /* Page Request Interface */
413 unsigned int is_managed:1;
414 unsigned int needs_freset:1; /* Requires fundamental reset */
415 unsigned int state_saved:1;
416 unsigned int is_physfn:1;
417 unsigned int is_virtfn:1;
418 unsigned int reset_fn:1;
419 unsigned int is_hotplug_bridge:1;
420 unsigned int shpc_managed:1; /* SHPC owned by shpchp */
421 unsigned int is_thunderbolt:1; /* Thunderbolt controller */
423 * Devices marked being untrusted are the ones that can potentially
424 * execute DMA attacks and similar. They are typically connected
425 * through external ports such as Thunderbolt but not limited to
426 * that. When an IOMMU is enabled they should be getting full
427 * mappings to make sure they cannot access arbitrary memory.
429 unsigned int untrusted:1;
431 * Info from the platform, e.g., ACPI or device tree, may mark a
432 * device as "external-facing". An external-facing device is
433 * itself internal but devices downstream from it are external.
435 unsigned int external_facing:1;
436 unsigned int broken_intx_masking:1; /* INTx masking can't be used */
437 unsigned int io_window_1k:1; /* Intel bridge 1K I/O windows */
438 unsigned int irq_managed:1;
439 unsigned int non_compliant_bars:1; /* Broken BARs; ignore them */
440 unsigned int is_probed:1; /* Device probing in progress */
441 unsigned int link_active_reporting:1;/* Device capable of reporting link active */
442 unsigned int no_vf_scan:1; /* Don't scan for VFs after IOV enablement */
443 unsigned int no_command_memory:1; /* No PCI_COMMAND_MEMORY */
444 pci_dev_flags_t dev_flags;
445 atomic_t enable_cnt; /* pci_enable_device has been called */
447 u32 saved_config_space[16]; /* Config space saved at suspend time */
448 struct hlist_head saved_cap_space;
449 int rom_attr_enabled; /* Display of ROM attribute enabled? */
450 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
451 struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
453 #ifdef CONFIG_HOTPLUG_PCI_PCIE
454 unsigned int broken_cmd_compl:1; /* No compl for some cmds */
456 #ifdef CONFIG_PCIE_PTM
457 unsigned int ptm_root:1;
458 unsigned int ptm_enabled:1;
461 #ifdef CONFIG_PCI_MSI
462 const struct attribute_group **msi_irq_groups;
465 #ifdef CONFIG_PCIE_DPC
467 unsigned int dpc_rp_extensions:1;
470 #ifdef CONFIG_PCI_ATS
472 struct pci_sriov *sriov; /* PF: SR-IOV info */
473 struct pci_dev *physfn; /* VF: related PF */
475 u16 ats_cap; /* ATS Capability offset */
476 u8 ats_stu; /* ATS Smallest Translation Unit */
478 #ifdef CONFIG_PCI_PRI
479 u16 pri_cap; /* PRI Capability offset */
480 u32 pri_reqs_alloc; /* Number of PRI requests allocated */
481 unsigned int pasid_required:1; /* PRG Response PASID Required */
483 #ifdef CONFIG_PCI_PASID
484 u16 pasid_cap; /* PASID Capability offset */
487 #ifdef CONFIG_PCI_P2PDMA
488 struct pci_p2pdma __rcu *p2pdma;
490 u16 acs_cap; /* ACS Capability offset */
491 phys_addr_t rom; /* Physical address if not from BAR */
492 size_t romlen; /* Length if not from BAR */
493 char *driver_override; /* Driver name to force a match */
495 unsigned long priv_flags; /* Private flags for the PCI driver */
498 static inline struct pci_dev *pci_physfn(struct pci_dev *dev)
500 #ifdef CONFIG_PCI_IOV
507 struct pci_dev *pci_alloc_dev(struct pci_bus *bus);
509 #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
510 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
512 static inline int pci_channel_offline(struct pci_dev *pdev)
514 return (pdev->error_state != pci_channel_io_normal);
517 struct pci_host_bridge {
519 struct pci_bus *bus; /* Root bus */
521 struct pci_ops *child_ops;
524 struct list_head windows; /* resource_entry */
525 struct list_head dma_ranges; /* dma ranges resource list */
526 u8 (*swizzle_irq)(struct pci_dev *, u8 *); /* Platform IRQ swizzler */
527 int (*map_irq)(const struct pci_dev *, u8, u8);
528 void (*release_fn)(struct pci_host_bridge *);
530 unsigned int ignore_reset_delay:1; /* For entire hierarchy */
531 unsigned int no_ext_tags:1; /* No Extended Tags */
532 unsigned int native_aer:1; /* OS may use PCIe AER */
533 unsigned int native_pcie_hotplug:1; /* OS may use PCIe hotplug */
534 unsigned int native_shpc_hotplug:1; /* OS may use SHPC hotplug */
535 unsigned int native_pme:1; /* OS may use PCIe PME */
536 unsigned int native_ltr:1; /* OS may use PCIe LTR */
537 unsigned int native_dpc:1; /* OS may use PCIe DPC */
538 unsigned int preserve_config:1; /* Preserve FW resource setup */
539 unsigned int size_windows:1; /* Enable root bus sizing */
540 unsigned int msi_domain:1; /* Bridge wants MSI domain */
542 /* Resource alignment requirements */
543 resource_size_t (*align_resource)(struct pci_dev *dev,
544 const struct resource *res,
545 resource_size_t start,
546 resource_size_t size,
547 resource_size_t align);
548 unsigned long private[] ____cacheline_aligned;
551 #define to_pci_host_bridge(n) container_of(n, struct pci_host_bridge, dev)
553 static inline void *pci_host_bridge_priv(struct pci_host_bridge *bridge)
555 return (void *)bridge->private;
558 static inline struct pci_host_bridge *pci_host_bridge_from_priv(void *priv)
560 return container_of(priv, struct pci_host_bridge, private);
563 struct pci_host_bridge *pci_alloc_host_bridge(size_t priv);
564 struct pci_host_bridge *devm_pci_alloc_host_bridge(struct device *dev,
566 void pci_free_host_bridge(struct pci_host_bridge *bridge);
567 struct pci_host_bridge *pci_find_host_bridge(struct pci_bus *bus);
569 void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
570 void (*release_fn)(struct pci_host_bridge *),
573 int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge);
576 * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond
577 * to P2P or CardBus bridge windows) go in a table. Additional ones (for
578 * buses below host bridges or subtractive decode bridges) go in the list.
579 * Use pci_bus_for_each_resource() to iterate through all the resources.
583 * PCI_SUBTRACTIVE_DECODE means the bridge forwards the window implicitly
584 * and there's no way to program the bridge with the details of the window.
585 * This does not apply to ACPI _CRS windows, even with the _DEC subtractive-
586 * decode bit set, because they are explicit and can be programmed with _SRS.
588 #define PCI_SUBTRACTIVE_DECODE 0x1
590 struct pci_bus_resource {
591 struct list_head list;
592 struct resource *res;
596 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
599 struct list_head node; /* Node in list of buses */
600 struct pci_bus *parent; /* Parent bus this bridge is on */
601 struct list_head children; /* List of child buses */
602 struct list_head devices; /* List of devices on this bus */
603 struct pci_dev *self; /* Bridge device as seen by parent */
604 struct list_head slots; /* List of slots on this bus;
605 protected by pci_slot_mutex */
606 struct resource *resource[PCI_BRIDGE_RESOURCE_NUM];
607 struct list_head resources; /* Address space routed to this bus */
608 struct resource busn_res; /* Bus numbers routed to this bus */
610 struct pci_ops *ops; /* Configuration access functions */
611 void *sysdata; /* Hook for sys-specific extension */
612 struct proc_dir_entry *procdir; /* Directory entry in /proc/bus/pci */
614 unsigned char number; /* Bus number */
615 unsigned char primary; /* Number of primary bridge */
616 unsigned char max_bus_speed; /* enum pci_bus_speed */
617 unsigned char cur_bus_speed; /* enum pci_bus_speed */
618 #ifdef CONFIG_PCI_DOMAINS_GENERIC
624 unsigned short bridge_ctl; /* Manage NO_ISA/FBB/et al behaviors */
625 pci_bus_flags_t bus_flags; /* Inherited by child buses */
626 struct device *bridge;
628 struct bin_attribute *legacy_io; /* Legacy I/O for this bus */
629 struct bin_attribute *legacy_mem; /* Legacy mem */
630 unsigned int is_added:1;
633 #define to_pci_bus(n) container_of(n, struct pci_bus, dev)
635 static inline u16 pci_dev_id(struct pci_dev *dev)
637 return PCI_DEVID(dev->bus->number, dev->devfn);
641 * Returns true if the PCI bus is root (behind host-PCI bridge),
644 * Some code assumes that "bus->self == NULL" means that bus is a root bus.
645 * This is incorrect because "virtual" buses added for SR-IOV (via
646 * virtfn_add_bus()) have "bus->self == NULL" but are not root buses.
648 static inline bool pci_is_root_bus(struct pci_bus *pbus)
650 return !(pbus->parent);
654 * pci_is_bridge - check if the PCI device is a bridge
657 * Return true if the PCI device is bridge whether it has subordinate
660 static inline bool pci_is_bridge(struct pci_dev *dev)
662 return dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
663 dev->hdr_type == PCI_HEADER_TYPE_CARDBUS;
666 #define for_each_pci_bridge(dev, bus) \
667 list_for_each_entry(dev, &bus->devices, bus_list) \
668 if (!pci_is_bridge(dev)) {} else
670 static inline struct pci_dev *pci_upstream_bridge(struct pci_dev *dev)
672 dev = pci_physfn(dev);
673 if (pci_is_root_bus(dev->bus))
676 return dev->bus->self;
679 #ifdef CONFIG_PCI_MSI
680 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev)
682 return pci_dev->msi_enabled || pci_dev->msix_enabled;
685 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false; }
688 /* Error values that may be returned by PCI functions */
689 #define PCIBIOS_SUCCESSFUL 0x00
690 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
691 #define PCIBIOS_BAD_VENDOR_ID 0x83
692 #define PCIBIOS_DEVICE_NOT_FOUND 0x86
693 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87
694 #define PCIBIOS_SET_FAILED 0x88
695 #define PCIBIOS_BUFFER_TOO_SMALL 0x89
697 /* Translate above to generic errno for passing back through non-PCI code */
698 static inline int pcibios_err_to_errno(int err)
700 if (err <= PCIBIOS_SUCCESSFUL)
701 return err; /* Assume already errno */
704 case PCIBIOS_FUNC_NOT_SUPPORTED:
706 case PCIBIOS_BAD_VENDOR_ID:
708 case PCIBIOS_DEVICE_NOT_FOUND:
710 case PCIBIOS_BAD_REGISTER_NUMBER:
712 case PCIBIOS_SET_FAILED:
714 case PCIBIOS_BUFFER_TOO_SMALL:
721 /* Low-level architecture-dependent routines */
724 int (*add_bus)(struct pci_bus *bus);
725 void (*remove_bus)(struct pci_bus *bus);
726 void __iomem *(*map_bus)(struct pci_bus *bus, unsigned int devfn, int where);
727 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
728 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
732 * ACPI needs to be able to access PCI config space before we've done a
733 * PCI bus scan and created pci_bus structures.
735 int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn,
736 int reg, int len, u32 *val);
737 int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,
738 int reg, int len, u32 val);
740 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
741 typedef u64 pci_bus_addr_t;
743 typedef u32 pci_bus_addr_t;
746 struct pci_bus_region {
747 pci_bus_addr_t start;
752 spinlock_t lock; /* Protects list, index */
753 struct list_head list; /* For IDs added at runtime */
758 * PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
759 * a set of callbacks in struct pci_error_handlers, that device driver
760 * will be notified of PCI bus errors, and will be driven to recovery
761 * when an error occurs.
764 typedef unsigned int __bitwise pci_ers_result_t;
766 enum pci_ers_result {
767 /* No result/none/not supported in device driver */
768 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
770 /* Device driver can recover without slot reset */
771 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
773 /* Device driver wants slot to be reset */
774 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
776 /* Device has completely failed, is unrecoverable */
777 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
779 /* Device driver is fully recovered and operational */
780 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
782 /* No AER capabilities registered for the driver */
783 PCI_ERS_RESULT_NO_AER_DRIVER = (__force pci_ers_result_t) 6,
786 /* PCI bus error event callbacks */
787 struct pci_error_handlers {
788 /* PCI bus error detected on this device */
789 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
790 pci_channel_state_t error);
792 /* MMIO has been re-enabled, but not DMA */
793 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
795 /* PCI slot has been reset */
796 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
798 /* PCI function reset prepare or completed */
799 void (*reset_prepare)(struct pci_dev *dev);
800 void (*reset_done)(struct pci_dev *dev);
802 /* Device driver may resume normal operations */
803 void (*resume)(struct pci_dev *dev);
810 * struct pci_driver - PCI driver structure
811 * @node: List of driver structures.
812 * @name: Driver name.
813 * @id_table: Pointer to table of device IDs the driver is
814 * interested in. Most drivers should export this
815 * table using MODULE_DEVICE_TABLE(pci,...).
816 * @probe: This probing function gets called (during execution
817 * of pci_register_driver() for already existing
818 * devices or later if a new device gets inserted) for
819 * all PCI devices which match the ID table and are not
820 * "owned" by the other drivers yet. This function gets
821 * passed a "struct pci_dev \*" for each device whose
822 * entry in the ID table matches the device. The probe
823 * function returns zero when the driver chooses to
824 * take "ownership" of the device or an error code
825 * (negative number) otherwise.
826 * The probe function always gets called from process
827 * context, so it can sleep.
828 * @remove: The remove() function gets called whenever a device
829 * being handled by this driver is removed (either during
830 * deregistration of the driver or when it's manually
831 * pulled out of a hot-pluggable slot).
832 * The remove function always gets called from process
833 * context, so it can sleep.
834 * @suspend: Put device into low power state.
835 * @resume: Wake device from low power state.
836 * (Please see Documentation/power/pci.rst for descriptions
837 * of PCI Power Management and the related functions.)
838 * @shutdown: Hook into reboot_notifier_list (kernel/sys.c).
839 * Intended to stop any idling DMA operations.
840 * Useful for enabling wake-on-lan (NIC) or changing
841 * the power state of a device before reboot.
842 * e.g. drivers/net/e100.c.
843 * @sriov_configure: Optional driver callback to allow configuration of
844 * number of VFs to enable via sysfs "sriov_numvfs" file.
845 * @sriov_set_msix_vec_count: PF Driver callback to change number of MSI-X
846 * vectors on a VF. Triggered via sysfs "sriov_vf_msix_count".
847 * This will change MSI-X Table Size in the VF Message Control
849 * @sriov_get_vf_total_msix: PF driver callback to get the total number of
850 * MSI-X vectors available for distribution to the VFs.
851 * @err_handler: See Documentation/PCI/pci-error-recovery.rst
852 * @groups: Sysfs attribute groups.
853 * @dev_groups: Attributes attached to the device that will be
854 * created once it is bound to the driver.
855 * @driver: Driver model structure.
856 * @dynids: List of dynamically added device IDs.
859 struct list_head node;
861 const struct pci_device_id *id_table; /* Must be non-NULL for probe to be called */
862 int (*probe)(struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
863 void (*remove)(struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
864 int (*suspend)(struct pci_dev *dev, pm_message_t state); /* Device suspended */
865 int (*resume)(struct pci_dev *dev); /* Device woken up */
866 void (*shutdown)(struct pci_dev *dev);
867 int (*sriov_configure)(struct pci_dev *dev, int num_vfs); /* On PF */
868 int (*sriov_set_msix_vec_count)(struct pci_dev *vf, int msix_vec_count); /* On PF */
869 u32 (*sriov_get_vf_total_msix)(struct pci_dev *pf);
870 const struct pci_error_handlers *err_handler;
871 const struct attribute_group **groups;
872 const struct attribute_group **dev_groups;
873 struct device_driver driver;
874 struct pci_dynids dynids;
877 #define to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
880 * PCI_DEVICE - macro used to describe a specific PCI device
881 * @vend: the 16 bit PCI Vendor ID
882 * @dev: the 16 bit PCI Device ID
884 * This macro is used to create a struct pci_device_id that matches a
885 * specific device. The subvendor and subdevice fields will be set to
888 #define PCI_DEVICE(vend,dev) \
889 .vendor = (vend), .device = (dev), \
890 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
893 * PCI_DEVICE_SUB - macro used to describe a specific PCI device with subsystem
894 * @vend: the 16 bit PCI Vendor ID
895 * @dev: the 16 bit PCI Device ID
896 * @subvend: the 16 bit PCI Subvendor ID
897 * @subdev: the 16 bit PCI Subdevice ID
899 * This macro is used to create a struct pci_device_id that matches a
900 * specific device with subsystem information.
902 #define PCI_DEVICE_SUB(vend, dev, subvend, subdev) \
903 .vendor = (vend), .device = (dev), \
904 .subvendor = (subvend), .subdevice = (subdev)
907 * PCI_DEVICE_CLASS - macro used to describe a specific PCI device class
908 * @dev_class: the class, subclass, prog-if triple for this device
909 * @dev_class_mask: the class mask for this device
911 * This macro is used to create a struct pci_device_id that matches a
912 * specific PCI class. The vendor, device, subvendor, and subdevice
913 * fields will be set to PCI_ANY_ID.
915 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
916 .class = (dev_class), .class_mask = (dev_class_mask), \
917 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
918 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
921 * PCI_VDEVICE - macro used to describe a specific PCI device in short form
922 * @vend: the vendor name
923 * @dev: the 16 bit PCI Device ID
925 * This macro is used to create a struct pci_device_id that matches a
926 * specific PCI device. The subvendor, and subdevice fields will be set
927 * to PCI_ANY_ID. The macro allows the next field to follow as the device
930 #define PCI_VDEVICE(vend, dev) \
931 .vendor = PCI_VENDOR_ID_##vend, .device = (dev), \
932 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0
935 * PCI_DEVICE_DATA - macro used to describe a specific PCI device in very short form
936 * @vend: the vendor name (without PCI_VENDOR_ID_ prefix)
937 * @dev: the device name (without PCI_DEVICE_ID_<vend>_ prefix)
938 * @data: the driver data to be filled
940 * This macro is used to create a struct pci_device_id that matches a
941 * specific PCI device. The subvendor, and subdevice fields will be set
944 #define PCI_DEVICE_DATA(vend, dev, data) \
945 .vendor = PCI_VENDOR_ID_##vend, .device = PCI_DEVICE_ID_##vend##_##dev, \
946 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0, \
947 .driver_data = (kernel_ulong_t)(data)
950 PCI_REASSIGN_ALL_RSRC = 0x00000001, /* Ignore firmware setup */
951 PCI_REASSIGN_ALL_BUS = 0x00000002, /* Reassign all bus numbers */
952 PCI_PROBE_ONLY = 0x00000004, /* Use existing setup */
953 PCI_CAN_SKIP_ISA_ALIGN = 0x00000008, /* Don't do ISA alignment */
954 PCI_ENABLE_PROC_DOMAINS = 0x00000010, /* Enable domains in /proc */
955 PCI_COMPAT_DOMAIN_0 = 0x00000020, /* ... except domain 0 */
956 PCI_SCAN_ALL_PCIE_DEVS = 0x00000040, /* Scan all, not just dev 0 */
959 #define PCI_IRQ_LEGACY (1 << 0) /* Allow legacy interrupts */
960 #define PCI_IRQ_MSI (1 << 1) /* Allow MSI interrupts */
961 #define PCI_IRQ_MSIX (1 << 2) /* Allow MSI-X interrupts */
962 #define PCI_IRQ_AFFINITY (1 << 3) /* Auto-assign affinity */
964 /* These external functions are only available when PCI support is enabled */
967 extern unsigned int pci_flags;
969 static inline void pci_set_flags(int flags) { pci_flags = flags; }
970 static inline void pci_add_flags(int flags) { pci_flags |= flags; }
971 static inline void pci_clear_flags(int flags) { pci_flags &= ~flags; }
972 static inline int pci_has_flag(int flag) { return pci_flags & flag; }
974 void pcie_bus_configure_settings(struct pci_bus *bus);
976 enum pcie_bus_config_types {
977 PCIE_BUS_TUNE_OFF, /* Don't touch MPS at all */
978 PCIE_BUS_DEFAULT, /* Ensure MPS matches upstream bridge */
979 PCIE_BUS_SAFE, /* Use largest MPS boot-time devices support */
980 PCIE_BUS_PERFORMANCE, /* Use MPS and MRRS for best performance */
981 PCIE_BUS_PEER2PEER, /* Set MPS = 128 for all devices */
984 extern enum pcie_bus_config_types pcie_bus_config;
986 extern struct bus_type pci_bus_type;
988 /* Do NOT directly access these two variables, unless you are arch-specific PCI
989 * code, or PCI core code. */
990 extern struct list_head pci_root_buses; /* List of all known PCI buses */
991 /* Some device drivers need know if PCI is initiated */
992 int no_pci_devices(void);
994 void pcibios_resource_survey_bus(struct pci_bus *bus);
995 void pcibios_bus_add_device(struct pci_dev *pdev);
996 void pcibios_add_bus(struct pci_bus *bus);
997 void pcibios_remove_bus(struct pci_bus *bus);
998 void pcibios_fixup_bus(struct pci_bus *);
999 int __must_check pcibios_enable_device(struct pci_dev *, int mask);
1000 /* Architecture-specific versions may override this (weak) */
1001 char *pcibios_setup(char *str);
1003 /* Used only when drivers/pci/setup.c is used */
1004 resource_size_t pcibios_align_resource(void *, const struct resource *,
1008 /* Weak but can be overridden by arch */
1009 void pci_fixup_cardbus(struct pci_bus *);
1011 /* Generic PCI functions used internally */
1013 void pcibios_resource_to_bus(struct pci_bus *bus, struct pci_bus_region *region,
1014 struct resource *res);
1015 void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res,
1016 struct pci_bus_region *region);
1017 void pcibios_scan_specific_bus(int busn);
1018 struct pci_bus *pci_find_bus(int domain, int busnr);
1019 void pci_bus_add_devices(const struct pci_bus *bus);
1020 struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata);
1021 struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
1022 struct pci_ops *ops, void *sysdata,
1023 struct list_head *resources);
1024 int pci_host_probe(struct pci_host_bridge *bridge);
1025 int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax);
1026 int pci_bus_update_busn_res_end(struct pci_bus *b, int busmax);
1027 void pci_bus_release_busn_res(struct pci_bus *b);
1028 struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
1029 struct pci_ops *ops, void *sysdata,
1030 struct list_head *resources);
1031 int pci_scan_root_bus_bridge(struct pci_host_bridge *bridge);
1032 struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
1034 struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
1036 struct hotplug_slot *hotplug);
1037 void pci_destroy_slot(struct pci_slot *slot);
1039 void pci_dev_assign_slot(struct pci_dev *dev);
1041 static inline void pci_dev_assign_slot(struct pci_dev *dev) { }
1043 int pci_scan_slot(struct pci_bus *bus, int devfn);
1044 struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
1045 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
1046 unsigned int pci_scan_child_bus(struct pci_bus *bus);
1047 void pci_bus_add_device(struct pci_dev *dev);
1048 void pci_read_bridge_bases(struct pci_bus *child);
1049 struct resource *pci_find_parent_resource(const struct pci_dev *dev,
1050 struct resource *res);
1051 u8 pci_swizzle_interrupt_pin(const struct pci_dev *dev, u8 pin);
1052 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
1053 u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp);
1054 struct pci_dev *pci_dev_get(struct pci_dev *dev);
1055 void pci_dev_put(struct pci_dev *dev);
1056 void pci_remove_bus(struct pci_bus *b);
1057 void pci_stop_and_remove_bus_device(struct pci_dev *dev);
1058 void pci_stop_and_remove_bus_device_locked(struct pci_dev *dev);
1059 void pci_stop_root_bus(struct pci_bus *bus);
1060 void pci_remove_root_bus(struct pci_bus *bus);
1061 void pci_setup_cardbus(struct pci_bus *bus);
1062 void pcibios_setup_bridge(struct pci_bus *bus, unsigned long type);
1063 void pci_sort_breadthfirst(void);
1064 #define dev_is_pci(d) ((d)->bus == &pci_bus_type)
1065 #define dev_is_pf(d) ((dev_is_pci(d) ? to_pci_dev(d)->is_physfn : false))
1067 /* Generic PCI functions exported to card drivers */
1069 u8 pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
1070 u8 pci_find_capability(struct pci_dev *dev, int cap);
1071 u8 pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
1072 u8 pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
1073 u8 pci_find_next_ht_capability(struct pci_dev *dev, u8 pos, int ht_cap);
1074 u16 pci_find_ext_capability(struct pci_dev *dev, int cap);
1075 u16 pci_find_next_ext_capability(struct pci_dev *dev, u16 pos, int cap);
1076 struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
1077 u16 pci_find_vsec_capability(struct pci_dev *dev, u16 vendor, int cap);
1079 u64 pci_get_dsn(struct pci_dev *dev);
1081 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
1082 struct pci_dev *from);
1083 struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
1084 unsigned int ss_vendor, unsigned int ss_device,
1085 struct pci_dev *from);
1086 struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
1087 struct pci_dev *pci_get_domain_bus_and_slot(int domain, unsigned int bus,
1088 unsigned int devfn);
1089 struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
1090 int pci_dev_present(const struct pci_device_id *ids);
1092 int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn,
1093 int where, u8 *val);
1094 int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn,
1095 int where, u16 *val);
1096 int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn,
1097 int where, u32 *val);
1098 int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
1100 int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn,
1101 int where, u16 val);
1102 int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,
1103 int where, u32 val);
1105 int pci_generic_config_read(struct pci_bus *bus, unsigned int devfn,
1106 int where, int size, u32 *val);
1107 int pci_generic_config_write(struct pci_bus *bus, unsigned int devfn,
1108 int where, int size, u32 val);
1109 int pci_generic_config_read32(struct pci_bus *bus, unsigned int devfn,
1110 int where, int size, u32 *val);
1111 int pci_generic_config_write32(struct pci_bus *bus, unsigned int devfn,
1112 int where, int size, u32 val);
1114 struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops);
1116 int pci_read_config_byte(const struct pci_dev *dev, int where, u8 *val);
1117 int pci_read_config_word(const struct pci_dev *dev, int where, u16 *val);
1118 int pci_read_config_dword(const struct pci_dev *dev, int where, u32 *val);
1119 int pci_write_config_byte(const struct pci_dev *dev, int where, u8 val);
1120 int pci_write_config_word(const struct pci_dev *dev, int where, u16 val);
1121 int pci_write_config_dword(const struct pci_dev *dev, int where, u32 val);
1123 int pcie_capability_read_word(struct pci_dev *dev, int pos, u16 *val);
1124 int pcie_capability_read_dword(struct pci_dev *dev, int pos, u32 *val);
1125 int pcie_capability_write_word(struct pci_dev *dev, int pos, u16 val);
1126 int pcie_capability_write_dword(struct pci_dev *dev, int pos, u32 val);
1127 int pcie_capability_clear_and_set_word(struct pci_dev *dev, int pos,
1128 u16 clear, u16 set);
1129 int pcie_capability_clear_and_set_dword(struct pci_dev *dev, int pos,
1130 u32 clear, u32 set);
1132 static inline int pcie_capability_set_word(struct pci_dev *dev, int pos,
1135 return pcie_capability_clear_and_set_word(dev, pos, 0, set);
1138 static inline int pcie_capability_set_dword(struct pci_dev *dev, int pos,
1141 return pcie_capability_clear_and_set_dword(dev, pos, 0, set);
1144 static inline int pcie_capability_clear_word(struct pci_dev *dev, int pos,
1147 return pcie_capability_clear_and_set_word(dev, pos, clear, 0);
1150 static inline int pcie_capability_clear_dword(struct pci_dev *dev, int pos,
1153 return pcie_capability_clear_and_set_dword(dev, pos, clear, 0);
1156 /* User-space driven config access */
1157 int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val);
1158 int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val);
1159 int pci_user_read_config_dword(struct pci_dev *dev, int where, u32 *val);
1160 int pci_user_write_config_byte(struct pci_dev *dev, int where, u8 val);
1161 int pci_user_write_config_word(struct pci_dev *dev, int where, u16 val);
1162 int pci_user_write_config_dword(struct pci_dev *dev, int where, u32 val);
1164 int __must_check pci_enable_device(struct pci_dev *dev);
1165 int __must_check pci_enable_device_io(struct pci_dev *dev);
1166 int __must_check pci_enable_device_mem(struct pci_dev *dev);
1167 int __must_check pci_reenable_device(struct pci_dev *);
1168 int __must_check pcim_enable_device(struct pci_dev *pdev);
1169 void pcim_pin_device(struct pci_dev *pdev);
1171 static inline bool pci_intx_mask_supported(struct pci_dev *pdev)
1174 * INTx masking is supported if PCI_COMMAND_INTX_DISABLE is
1175 * writable and no quirk has marked the feature broken.
1177 return !pdev->broken_intx_masking;
1180 static inline int pci_is_enabled(struct pci_dev *pdev)
1182 return (atomic_read(&pdev->enable_cnt) > 0);
1185 static inline int pci_is_managed(struct pci_dev *pdev)
1187 return pdev->is_managed;
1190 void pci_disable_device(struct pci_dev *dev);
1192 extern unsigned int pcibios_max_latency;
1193 void pci_set_master(struct pci_dev *dev);
1194 void pci_clear_master(struct pci_dev *dev);
1196 int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
1197 int pci_set_cacheline_size(struct pci_dev *dev);
1198 int __must_check pci_set_mwi(struct pci_dev *dev);
1199 int __must_check pcim_set_mwi(struct pci_dev *dev);
1200 int pci_try_set_mwi(struct pci_dev *dev);
1201 void pci_clear_mwi(struct pci_dev *dev);
1202 void pci_disable_parity(struct pci_dev *dev);
1203 void pci_intx(struct pci_dev *dev, int enable);
1204 bool pci_check_and_mask_intx(struct pci_dev *dev);
1205 bool pci_check_and_unmask_intx(struct pci_dev *dev);
1206 int pci_wait_for_pending(struct pci_dev *dev, int pos, u16 mask);
1207 int pci_wait_for_pending_transaction(struct pci_dev *dev);
1208 int pcix_get_max_mmrbc(struct pci_dev *dev);
1209 int pcix_get_mmrbc(struct pci_dev *dev);
1210 int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
1211 int pcie_get_readrq(struct pci_dev *dev);
1212 int pcie_set_readrq(struct pci_dev *dev, int rq);
1213 int pcie_get_mps(struct pci_dev *dev);
1214 int pcie_set_mps(struct pci_dev *dev, int mps);
1215 u32 pcie_bandwidth_available(struct pci_dev *dev, struct pci_dev **limiting_dev,
1216 enum pci_bus_speed *speed,
1217 enum pcie_link_width *width);
1218 void pcie_print_link_status(struct pci_dev *dev);
1219 bool pcie_has_flr(struct pci_dev *dev);
1220 int pcie_flr(struct pci_dev *dev);
1221 int __pci_reset_function_locked(struct pci_dev *dev);
1222 int pci_reset_function(struct pci_dev *dev);
1223 int pci_reset_function_locked(struct pci_dev *dev);
1224 int pci_try_reset_function(struct pci_dev *dev);
1225 int pci_probe_reset_slot(struct pci_slot *slot);
1226 int pci_probe_reset_bus(struct pci_bus *bus);
1227 int pci_reset_bus(struct pci_dev *dev);
1228 void pci_reset_secondary_bus(struct pci_dev *dev);
1229 void pcibios_reset_secondary_bus(struct pci_dev *dev);
1230 void pci_update_resource(struct pci_dev *dev, int resno);
1231 int __must_check pci_assign_resource(struct pci_dev *dev, int i);
1232 int __must_check pci_reassign_resource(struct pci_dev *dev, int i, resource_size_t add_size, resource_size_t align);
1233 void pci_release_resource(struct pci_dev *dev, int resno);
1234 static inline int pci_rebar_bytes_to_size(u64 bytes)
1236 bytes = roundup_pow_of_two(bytes);
1238 /* Return BAR size as defined in the resizable BAR specification */
1239 return max(ilog2(bytes), 20) - 20;
1242 u32 pci_rebar_get_possible_sizes(struct pci_dev *pdev, int bar);
1243 int __must_check pci_resize_resource(struct pci_dev *dev, int i, int size);
1244 int pci_select_bars(struct pci_dev *dev, unsigned long flags);
1245 bool pci_device_is_present(struct pci_dev *pdev);
1246 void pci_ignore_hotplug(struct pci_dev *dev);
1247 struct pci_dev *pci_real_dma_dev(struct pci_dev *dev);
1248 int pci_status_get_and_clear_errors(struct pci_dev *pdev);
1250 int __printf(6, 7) pci_request_irq(struct pci_dev *dev, unsigned int nr,
1251 irq_handler_t handler, irq_handler_t thread_fn, void *dev_id,
1252 const char *fmt, ...);
1253 void pci_free_irq(struct pci_dev *dev, unsigned int nr, void *dev_id);
1255 /* ROM control related routines */
1256 int pci_enable_rom(struct pci_dev *pdev);
1257 void pci_disable_rom(struct pci_dev *pdev);
1258 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
1259 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
1261 /* Power management related routines */
1262 int pci_save_state(struct pci_dev *dev);
1263 void pci_restore_state(struct pci_dev *dev);
1264 struct pci_saved_state *pci_store_saved_state(struct pci_dev *dev);
1265 int pci_load_saved_state(struct pci_dev *dev,
1266 struct pci_saved_state *state);
1267 int pci_load_and_free_saved_state(struct pci_dev *dev,
1268 struct pci_saved_state **state);
1269 int pci_platform_power_transition(struct pci_dev *dev, pci_power_t state);
1270 int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
1271 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
1272 bool pci_pme_capable(struct pci_dev *dev, pci_power_t state);
1273 void pci_pme_active(struct pci_dev *dev, bool enable);
1274 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable);
1275 int pci_wake_from_d3(struct pci_dev *dev, bool enable);
1276 int pci_prepare_to_sleep(struct pci_dev *dev);
1277 int pci_back_from_sleep(struct pci_dev *dev);
1278 bool pci_dev_run_wake(struct pci_dev *dev);
1279 void pci_d3cold_enable(struct pci_dev *dev);
1280 void pci_d3cold_disable(struct pci_dev *dev);
1281 bool pcie_relaxed_ordering_enabled(struct pci_dev *dev);
1282 void pci_resume_bus(struct pci_bus *bus);
1283 void pci_bus_set_current_state(struct pci_bus *bus, pci_power_t state);
1285 /* For use by arch with custom probe code */
1286 void set_pcie_port_type(struct pci_dev *pdev);
1287 void set_pcie_hotplug_bridge(struct pci_dev *pdev);
1289 /* Functions for PCI Hotplug drivers to use */
1290 unsigned int pci_rescan_bus_bridge_resize(struct pci_dev *bridge);
1291 unsigned int pci_rescan_bus(struct pci_bus *bus);
1292 void pci_lock_rescan_remove(void);
1293 void pci_unlock_rescan_remove(void);
1295 /* Vital Product Data routines */
1296 ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
1297 ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
1299 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
1300 resource_size_t pcibios_retrieve_fw_addr(struct pci_dev *dev, int idx);
1301 void pci_bus_assign_resources(const struct pci_bus *bus);
1302 void pci_bus_claim_resources(struct pci_bus *bus);
1303 void pci_bus_size_bridges(struct pci_bus *bus);
1304 int pci_claim_resource(struct pci_dev *, int);
1305 int pci_claim_bridge_resource(struct pci_dev *bridge, int i);
1306 void pci_assign_unassigned_resources(void);
1307 void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge);
1308 void pci_assign_unassigned_bus_resources(struct pci_bus *bus);
1309 void pci_assign_unassigned_root_bus_resources(struct pci_bus *bus);
1310 int pci_reassign_bridge_resources(struct pci_dev *bridge, unsigned long type);
1311 void pdev_enable_device(struct pci_dev *);
1312 int pci_enable_resources(struct pci_dev *, int mask);
1313 void pci_assign_irq(struct pci_dev *dev);
1314 struct resource *pci_find_resource(struct pci_dev *dev, struct resource *res);
1315 #define HAVE_PCI_REQ_REGIONS 2
1316 int __must_check pci_request_regions(struct pci_dev *, const char *);
1317 int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *);
1318 void pci_release_regions(struct pci_dev *);
1319 int __must_check pci_request_region(struct pci_dev *, int, const char *);
1320 void pci_release_region(struct pci_dev *, int);
1321 int pci_request_selected_regions(struct pci_dev *, int, const char *);
1322 int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *);
1323 void pci_release_selected_regions(struct pci_dev *, int);
1325 /* drivers/pci/bus.c */
1326 void pci_add_resource(struct list_head *resources, struct resource *res);
1327 void pci_add_resource_offset(struct list_head *resources, struct resource *res,
1328 resource_size_t offset);
1329 void pci_free_resource_list(struct list_head *resources);
1330 void pci_bus_add_resource(struct pci_bus *bus, struct resource *res,
1331 unsigned int flags);
1332 struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n);
1333 void pci_bus_remove_resources(struct pci_bus *bus);
1334 int devm_request_pci_bus_resources(struct device *dev,
1335 struct list_head *resources);
1337 /* Temporary until new and working PCI SBR API in place */
1338 int pci_bridge_secondary_bus_reset(struct pci_dev *dev);
1340 #define pci_bus_for_each_resource(bus, res, i) \
1342 (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \
1345 int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
1346 struct resource *res, resource_size_t size,
1347 resource_size_t align, resource_size_t min,
1348 unsigned long type_mask,
1349 resource_size_t (*alignf)(void *,
1350 const struct resource *,
1356 int pci_register_io_range(struct fwnode_handle *fwnode, phys_addr_t addr,
1357 resource_size_t size);
1358 unsigned long pci_address_to_pio(phys_addr_t addr);
1359 phys_addr_t pci_pio_to_address(unsigned long pio);
1360 int pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr);
1361 int devm_pci_remap_iospace(struct device *dev, const struct resource *res,
1362 phys_addr_t phys_addr);
1363 void pci_unmap_iospace(struct resource *res);
1364 void __iomem *devm_pci_remap_cfgspace(struct device *dev,
1365 resource_size_t offset,
1366 resource_size_t size);
1367 void __iomem *devm_pci_remap_cfg_resource(struct device *dev,
1368 struct resource *res);
1370 static inline pci_bus_addr_t pci_bus_address(struct pci_dev *pdev, int bar)
1372 struct pci_bus_region region;
1374 pcibios_resource_to_bus(pdev->bus, ®ion, &pdev->resource[bar]);
1375 return region.start;
1378 /* Proper probing supporting hot-pluggable devices */
1379 int __must_check __pci_register_driver(struct pci_driver *, struct module *,
1380 const char *mod_name);
1382 /* pci_register_driver() must be a macro so KBUILD_MODNAME can be expanded */
1383 #define pci_register_driver(driver) \
1384 __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
1386 void pci_unregister_driver(struct pci_driver *dev);
1389 * module_pci_driver() - Helper macro for registering a PCI driver
1390 * @__pci_driver: pci_driver struct
1392 * Helper macro for PCI drivers which do not do anything special in module
1393 * init/exit. This eliminates a lot of boilerplate. Each module may only
1394 * use this macro once, and calling it replaces module_init() and module_exit()
1396 #define module_pci_driver(__pci_driver) \
1397 module_driver(__pci_driver, pci_register_driver, pci_unregister_driver)
1400 * builtin_pci_driver() - Helper macro for registering a PCI driver
1401 * @__pci_driver: pci_driver struct
1403 * Helper macro for PCI drivers which do not do anything special in their
1404 * init code. This eliminates a lot of boilerplate. Each driver may only
1405 * use this macro once, and calling it replaces device_initcall(...)
1407 #define builtin_pci_driver(__pci_driver) \
1408 builtin_driver(__pci_driver, pci_register_driver)
1410 struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
1411 int pci_add_dynid(struct pci_driver *drv,
1412 unsigned int vendor, unsigned int device,
1413 unsigned int subvendor, unsigned int subdevice,
1414 unsigned int class, unsigned int class_mask,
1415 unsigned long driver_data);
1416 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
1417 struct pci_dev *dev);
1418 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
1421 void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
1423 int pci_cfg_space_size(struct pci_dev *dev);
1424 unsigned char pci_bus_max_busnr(struct pci_bus *bus);
1425 void pci_setup_bridge(struct pci_bus *bus);
1426 resource_size_t pcibios_window_alignment(struct pci_bus *bus,
1427 unsigned long type);
1429 #define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0)
1430 #define PCI_VGA_STATE_CHANGE_DECODES (1 << 1)
1432 int pci_set_vga_state(struct pci_dev *pdev, bool decode,
1433 unsigned int command_bits, u32 flags);
1436 * Virtual interrupts allow for more interrupts to be allocated
1437 * than the device has interrupts for. These are not programmed
1438 * into the device's MSI-X table and must be handled by some
1439 * other driver means.
1441 #define PCI_IRQ_VIRTUAL (1 << 4)
1443 #define PCI_IRQ_ALL_TYPES \
1444 (PCI_IRQ_LEGACY | PCI_IRQ_MSI | PCI_IRQ_MSIX)
1446 /* kmem_cache style wrapper around pci_alloc_consistent() */
1448 #include <linux/dmapool.h>
1450 #define pci_pool dma_pool
1451 #define pci_pool_create(name, pdev, size, align, allocation) \
1452 dma_pool_create(name, &pdev->dev, size, align, allocation)
1453 #define pci_pool_destroy(pool) dma_pool_destroy(pool)
1454 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
1455 #define pci_pool_zalloc(pool, flags, handle) \
1456 dma_pool_zalloc(pool, flags, handle)
1457 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
1460 u32 vector; /* Kernel uses to write allocated vector */
1461 u16 entry; /* Driver uses to specify entry, OS writes */
1464 #ifdef CONFIG_PCI_MSI
1465 int pci_msi_vec_count(struct pci_dev *dev);
1466 void pci_disable_msi(struct pci_dev *dev);
1467 int pci_msix_vec_count(struct pci_dev *dev);
1468 void pci_disable_msix(struct pci_dev *dev);
1469 void pci_restore_msi_state(struct pci_dev *dev);
1470 int pci_msi_enabled(void);
1471 int pci_enable_msi(struct pci_dev *dev);
1472 int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries,
1473 int minvec, int maxvec);
1474 static inline int pci_enable_msix_exact(struct pci_dev *dev,
1475 struct msix_entry *entries, int nvec)
1477 int rc = pci_enable_msix_range(dev, entries, nvec, nvec);
1482 int pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
1483 unsigned int max_vecs, unsigned int flags,
1484 struct irq_affinity *affd);
1486 void pci_free_irq_vectors(struct pci_dev *dev);
1487 int pci_irq_vector(struct pci_dev *dev, unsigned int nr);
1488 const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev, int vec);
1491 static inline int pci_msi_vec_count(struct pci_dev *dev) { return -ENOSYS; }
1492 static inline void pci_disable_msi(struct pci_dev *dev) { }
1493 static inline int pci_msix_vec_count(struct pci_dev *dev) { return -ENOSYS; }
1494 static inline void pci_disable_msix(struct pci_dev *dev) { }
1495 static inline void pci_restore_msi_state(struct pci_dev *dev) { }
1496 static inline int pci_msi_enabled(void) { return 0; }
1497 static inline int pci_enable_msi(struct pci_dev *dev)
1499 static inline int pci_enable_msix_range(struct pci_dev *dev,
1500 struct msix_entry *entries, int minvec, int maxvec)
1502 static inline int pci_enable_msix_exact(struct pci_dev *dev,
1503 struct msix_entry *entries, int nvec)
1507 pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
1508 unsigned int max_vecs, unsigned int flags,
1509 struct irq_affinity *aff_desc)
1511 if ((flags & PCI_IRQ_LEGACY) && min_vecs == 1 && dev->irq)
1516 static inline void pci_free_irq_vectors(struct pci_dev *dev)
1520 static inline int pci_irq_vector(struct pci_dev *dev, unsigned int nr)
1522 if (WARN_ON_ONCE(nr > 0))
1526 static inline const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev,
1529 return cpu_possible_mask;
1534 * pci_irqd_intx_xlate() - Translate PCI INTx value to an IRQ domain hwirq
1535 * @d: the INTx IRQ domain
1536 * @node: the DT node for the device whose interrupt we're translating
1537 * @intspec: the interrupt specifier data from the DT
1538 * @intsize: the number of entries in @intspec
1539 * @out_hwirq: pointer at which to write the hwirq number
1540 * @out_type: pointer at which to write the interrupt type
1542 * Translate a PCI INTx interrupt number from device tree in the range 1-4, as
1543 * stored in the standard PCI_INTERRUPT_PIN register, to a value in the range
1544 * 0-3 suitable for use in a 4 entry IRQ domain. That is, subtract one from the
1545 * INTx value to obtain the hwirq number.
1547 * Returns 0 on success, or -EINVAL if the interrupt specifier is out of range.
1549 static inline int pci_irqd_intx_xlate(struct irq_domain *d,
1550 struct device_node *node,
1552 unsigned int intsize,
1553 unsigned long *out_hwirq,
1554 unsigned int *out_type)
1556 const u32 intx = intspec[0];
1558 if (intx < PCI_INTERRUPT_INTA || intx > PCI_INTERRUPT_INTD)
1561 *out_hwirq = intx - PCI_INTERRUPT_INTA;
1565 #ifdef CONFIG_PCIEPORTBUS
1566 extern bool pcie_ports_disabled;
1567 extern bool pcie_ports_native;
1569 #define pcie_ports_disabled true
1570 #define pcie_ports_native false
1573 #define PCIE_LINK_STATE_L0S BIT(0)
1574 #define PCIE_LINK_STATE_L1 BIT(1)
1575 #define PCIE_LINK_STATE_CLKPM BIT(2)
1576 #define PCIE_LINK_STATE_L1_1 BIT(3)
1577 #define PCIE_LINK_STATE_L1_2 BIT(4)
1578 #define PCIE_LINK_STATE_L1_1_PCIPM BIT(5)
1579 #define PCIE_LINK_STATE_L1_2_PCIPM BIT(6)
1581 #ifdef CONFIG_PCIEASPM
1582 int pci_disable_link_state(struct pci_dev *pdev, int state);
1583 int pci_disable_link_state_locked(struct pci_dev *pdev, int state);
1584 void pcie_no_aspm(void);
1585 bool pcie_aspm_support_enabled(void);
1586 bool pcie_aspm_enabled(struct pci_dev *pdev);
1588 static inline int pci_disable_link_state(struct pci_dev *pdev, int state)
1590 static inline int pci_disable_link_state_locked(struct pci_dev *pdev, int state)
1592 static inline void pcie_no_aspm(void) { }
1593 static inline bool pcie_aspm_support_enabled(void) { return false; }
1594 static inline bool pcie_aspm_enabled(struct pci_dev *pdev) { return false; }
1597 #ifdef CONFIG_PCIEAER
1598 bool pci_aer_available(void);
1600 static inline bool pci_aer_available(void) { return false; }
1603 bool pci_ats_disabled(void);
1605 void pci_cfg_access_lock(struct pci_dev *dev);
1606 bool pci_cfg_access_trylock(struct pci_dev *dev);
1607 void pci_cfg_access_unlock(struct pci_dev *dev);
1609 int pci_dev_trylock(struct pci_dev *dev);
1610 void pci_dev_unlock(struct pci_dev *dev);
1613 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
1614 * a PCI domain is defined to be a set of PCI buses which share
1615 * configuration space.
1617 #ifdef CONFIG_PCI_DOMAINS
1618 extern int pci_domains_supported;
1620 enum { pci_domains_supported = 0 };
1621 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
1622 static inline int pci_proc_domain(struct pci_bus *bus) { return 0; }
1623 #endif /* CONFIG_PCI_DOMAINS */
1626 * Generic implementation for PCI domain support. If your
1627 * architecture does not need custom management of PCI
1628 * domains then this implementation will be used
1630 #ifdef CONFIG_PCI_DOMAINS_GENERIC
1631 static inline int pci_domain_nr(struct pci_bus *bus)
1633 return bus->domain_nr;
1636 int acpi_pci_bus_find_domain_nr(struct pci_bus *bus);
1638 static inline int acpi_pci_bus_find_domain_nr(struct pci_bus *bus)
1641 int pci_bus_find_domain_nr(struct pci_bus *bus, struct device *parent);
1644 /* Some architectures require additional setup to direct VGA traffic */
1645 typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode,
1646 unsigned int command_bits, u32 flags);
1647 void pci_register_set_vga_state(arch_set_vga_state_t func);
1650 pci_request_io_regions(struct pci_dev *pdev, const char *name)
1652 return pci_request_selected_regions(pdev,
1653 pci_select_bars(pdev, IORESOURCE_IO), name);
1657 pci_release_io_regions(struct pci_dev *pdev)
1659 return pci_release_selected_regions(pdev,
1660 pci_select_bars(pdev, IORESOURCE_IO));
1664 pci_request_mem_regions(struct pci_dev *pdev, const char *name)
1666 return pci_request_selected_regions(pdev,
1667 pci_select_bars(pdev, IORESOURCE_MEM), name);
1671 pci_release_mem_regions(struct pci_dev *pdev)
1673 return pci_release_selected_regions(pdev,
1674 pci_select_bars(pdev, IORESOURCE_MEM));
1677 #else /* CONFIG_PCI is not enabled */
1679 static inline void pci_set_flags(int flags) { }
1680 static inline void pci_add_flags(int flags) { }
1681 static inline void pci_clear_flags(int flags) { }
1682 static inline int pci_has_flag(int flag) { return 0; }
1685 * If the system does not have PCI, clearly these return errors. Define
1686 * these as simple inline functions to avoid hair in drivers.
1688 #define _PCI_NOP(o, s, t) \
1689 static inline int pci_##o##_config_##s(struct pci_dev *dev, \
1691 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
1693 #define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
1694 _PCI_NOP(o, word, u16 x) \
1695 _PCI_NOP(o, dword, u32 x)
1696 _PCI_NOP_ALL(read, *)
1697 _PCI_NOP_ALL(write,)
1699 static inline struct pci_dev *pci_get_device(unsigned int vendor,
1700 unsigned int device,
1701 struct pci_dev *from)
1704 static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
1705 unsigned int device,
1706 unsigned int ss_vendor,
1707 unsigned int ss_device,
1708 struct pci_dev *from)
1711 static inline struct pci_dev *pci_get_class(unsigned int class,
1712 struct pci_dev *from)
1715 #define pci_dev_present(ids) (0)
1716 #define no_pci_devices() (1)
1717 #define pci_dev_put(dev) do { } while (0)
1719 static inline void pci_set_master(struct pci_dev *dev) { }
1720 static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; }
1721 static inline void pci_disable_device(struct pci_dev *dev) { }
1722 static inline int pcim_enable_device(struct pci_dev *pdev) { return -EIO; }
1723 static inline int pci_assign_resource(struct pci_dev *dev, int i)
1725 static inline int __pci_register_driver(struct pci_driver *drv,
1726 struct module *owner)
1728 static inline int pci_register_driver(struct pci_driver *drv)
1730 static inline void pci_unregister_driver(struct pci_driver *drv) { }
1731 static inline u8 pci_find_capability(struct pci_dev *dev, int cap)
1733 static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
1736 static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
1739 static inline u64 pci_get_dsn(struct pci_dev *dev)
1742 /* Power management related routines */
1743 static inline int pci_save_state(struct pci_dev *dev) { return 0; }
1744 static inline void pci_restore_state(struct pci_dev *dev) { }
1745 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
1747 static inline int pci_wake_from_d3(struct pci_dev *dev, bool enable)
1749 static inline pci_power_t pci_choose_state(struct pci_dev *dev,
1752 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
1756 static inline struct resource *pci_find_resource(struct pci_dev *dev,
1757 struct resource *res)
1759 static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
1761 static inline void pci_release_regions(struct pci_dev *dev) { }
1763 static inline int pci_register_io_range(struct fwnode_handle *fwnode,
1764 phys_addr_t addr, resource_size_t size)
1767 static inline unsigned long pci_address_to_pio(phys_addr_t addr) { return -1; }
1769 static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
1771 static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
1774 static inline struct pci_dev *pci_get_domain_bus_and_slot(int domain,
1775 unsigned int bus, unsigned int devfn)
1778 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
1779 static inline struct pci_dev *pci_dev_get(struct pci_dev *dev) { return NULL; }
1781 #define dev_is_pci(d) (false)
1782 #define dev_is_pf(d) (false)
1783 static inline bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags)
1785 static inline int pci_irqd_intx_xlate(struct irq_domain *d,
1786 struct device_node *node,
1788 unsigned int intsize,
1789 unsigned long *out_hwirq,
1790 unsigned int *out_type)
1793 static inline const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
1794 struct pci_dev *dev)
1796 static inline bool pci_ats_disabled(void) { return true; }
1798 static inline int pci_irq_vector(struct pci_dev *dev, unsigned int nr)
1804 pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
1805 unsigned int max_vecs, unsigned int flags,
1806 struct irq_affinity *aff_desc)
1810 #endif /* CONFIG_PCI */
1813 pci_alloc_irq_vectors(struct pci_dev *dev, unsigned int min_vecs,
1814 unsigned int max_vecs, unsigned int flags)
1816 return pci_alloc_irq_vectors_affinity(dev, min_vecs, max_vecs, flags,
1820 /* Include architecture-dependent settings and functions */
1822 #include <asm/pci.h>
1824 /* These two functions provide almost identical functionality. Depending
1825 * on the architecture, one will be implemented as a wrapper around the
1826 * other (in drivers/pci/mmap.c).
1828 * pci_mmap_resource_range() maps a specific BAR, and vm->vm_pgoff
1829 * is expected to be an offset within that region.
1831 * pci_mmap_page_range() is the legacy architecture-specific interface,
1832 * which accepts a "user visible" resource address converted by
1833 * pci_resource_to_user(), as used in the legacy mmap() interface in
1836 int pci_mmap_resource_range(struct pci_dev *dev, int bar,
1837 struct vm_area_struct *vma,
1838 enum pci_mmap_state mmap_state, int write_combine);
1839 int pci_mmap_page_range(struct pci_dev *pdev, int bar,
1840 struct vm_area_struct *vma,
1841 enum pci_mmap_state mmap_state, int write_combine);
1843 #ifndef arch_can_pci_mmap_wc
1844 #define arch_can_pci_mmap_wc() 0
1847 #ifndef arch_can_pci_mmap_io
1848 #define arch_can_pci_mmap_io() 0
1849 #define pci_iobar_pfn(pdev, bar, vma) (-EINVAL)
1851 int pci_iobar_pfn(struct pci_dev *pdev, int bar, struct vm_area_struct *vma);
1854 #ifndef pci_root_bus_fwnode
1855 #define pci_root_bus_fwnode(bus) NULL
1859 * These helpers provide future and backwards compatibility
1860 * for accessing popular PCI BAR info
1862 #define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
1863 #define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end)
1864 #define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags)
1865 #define pci_resource_len(dev,bar) \
1866 ((pci_resource_start((dev), (bar)) == 0 && \
1867 pci_resource_end((dev), (bar)) == \
1868 pci_resource_start((dev), (bar))) ? 0 : \
1870 (pci_resource_end((dev), (bar)) - \
1871 pci_resource_start((dev), (bar)) + 1))
1874 * Similar to the helpers above, these manipulate per-pci_dev
1875 * driver-specific data. They are really just a wrapper around
1876 * the generic device structure functions of these calls.
1878 static inline void *pci_get_drvdata(struct pci_dev *pdev)
1880 return dev_get_drvdata(&pdev->dev);
1883 static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
1885 dev_set_drvdata(&pdev->dev, data);
1888 static inline const char *pci_name(const struct pci_dev *pdev)
1890 return dev_name(&pdev->dev);
1893 void pci_resource_to_user(const struct pci_dev *dev, int bar,
1894 const struct resource *rsrc,
1895 resource_size_t *start, resource_size_t *end);
1898 * The world is not perfect and supplies us with broken PCI devices.
1899 * For at least a part of these bugs we need a work-around, so both
1900 * generic (drivers/pci/quirks.c) and per-architecture code can define
1901 * fixup hooks to be called for particular buggy devices.
1905 u16 vendor; /* Or PCI_ANY_ID */
1906 u16 device; /* Or PCI_ANY_ID */
1907 u32 class; /* Or PCI_ANY_ID */
1908 unsigned int class_shift; /* should be 0, 8, 16 */
1909 #ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
1912 void (*hook)(struct pci_dev *dev);
1916 enum pci_fixup_pass {
1917 pci_fixup_early, /* Before probing BARs */
1918 pci_fixup_header, /* After reading configuration header */
1919 pci_fixup_final, /* Final phase of device fixups */
1920 pci_fixup_enable, /* pci_enable_device() time */
1921 pci_fixup_resume, /* pci_device_resume() */
1922 pci_fixup_suspend, /* pci_device_suspend() */
1923 pci_fixup_resume_early, /* pci_device_resume_early() */
1924 pci_fixup_suspend_late, /* pci_device_suspend_late() */
1927 #ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
1928 #define ___DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1929 class_shift, hook) \
1930 __ADDRESSABLE(hook) \
1931 asm(".section " #sec ", \"a\" \n" \
1933 ".short " #vendor ", " #device " \n" \
1934 ".long " #class ", " #class_shift " \n" \
1935 ".long " #hook " - . \n" \
1939 * Clang's LTO may rename static functions in C, but has no way to
1940 * handle such renamings when referenced from inline asm. To work
1941 * around this, create global C stubs for these cases.
1943 #ifdef CONFIG_LTO_CLANG
1944 #define __DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1945 class_shift, hook, stub) \
1946 void __cficanonical stub(struct pci_dev *dev); \
1947 void __cficanonical stub(struct pci_dev *dev) \
1951 ___DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1954 #define __DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1955 class_shift, hook, stub) \
1956 ___DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1960 #define DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1961 class_shift, hook) \
1962 __DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1963 class_shift, hook, __UNIQUE_ID(hook))
1965 /* Anonymous variables would be nice... */
1966 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, class, \
1967 class_shift, hook) \
1968 static const struct pci_fixup __PASTE(__pci_fixup_##name,__LINE__) __used \
1969 __attribute__((__section__(#section), aligned((sizeof(void *))))) \
1970 = { vendor, device, class, class_shift, hook };
1973 #define DECLARE_PCI_FIXUP_CLASS_EARLY(vendor, device, class, \
1974 class_shift, hook) \
1975 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1976 hook, vendor, device, class, class_shift, hook)
1977 #define DECLARE_PCI_FIXUP_CLASS_HEADER(vendor, device, class, \
1978 class_shift, hook) \
1979 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1980 hook, vendor, device, class, class_shift, hook)
1981 #define DECLARE_PCI_FIXUP_CLASS_FINAL(vendor, device, class, \
1982 class_shift, hook) \
1983 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1984 hook, vendor, device, class, class_shift, hook)
1985 #define DECLARE_PCI_FIXUP_CLASS_ENABLE(vendor, device, class, \
1986 class_shift, hook) \
1987 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1988 hook, vendor, device, class, class_shift, hook)
1989 #define DECLARE_PCI_FIXUP_CLASS_RESUME(vendor, device, class, \
1990 class_shift, hook) \
1991 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1992 resume##hook, vendor, device, class, class_shift, hook)
1993 #define DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(vendor, device, class, \
1994 class_shift, hook) \
1995 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
1996 resume_early##hook, vendor, device, class, class_shift, hook)
1997 #define DECLARE_PCI_FIXUP_CLASS_SUSPEND(vendor, device, class, \
1998 class_shift, hook) \
1999 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
2000 suspend##hook, vendor, device, class, class_shift, hook)
2001 #define DECLARE_PCI_FIXUP_CLASS_SUSPEND_LATE(vendor, device, class, \
2002 class_shift, hook) \
2003 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \
2004 suspend_late##hook, vendor, device, class, class_shift, hook)
2006 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
2007 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
2008 hook, vendor, device, PCI_ANY_ID, 0, hook)
2009 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
2010 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
2011 hook, vendor, device, PCI_ANY_ID, 0, hook)
2012 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
2013 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
2014 hook, vendor, device, PCI_ANY_ID, 0, hook)
2015 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
2016 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
2017 hook, vendor, device, PCI_ANY_ID, 0, hook)
2018 #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
2019 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
2020 resume##hook, vendor, device, PCI_ANY_ID, 0, hook)
2021 #define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \
2022 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
2023 resume_early##hook, vendor, device, PCI_ANY_ID, 0, hook)
2024 #define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \
2025 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
2026 suspend##hook, vendor, device, PCI_ANY_ID, 0, hook)
2027 #define DECLARE_PCI_FIXUP_SUSPEND_LATE(vendor, device, hook) \
2028 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \
2029 suspend_late##hook, vendor, device, PCI_ANY_ID, 0, hook)
2031 #ifdef CONFIG_PCI_QUIRKS
2032 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
2034 static inline void pci_fixup_device(enum pci_fixup_pass pass,
2035 struct pci_dev *dev) { }
2038 void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
2039 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
2040 void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
2041 int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name);
2042 int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
2044 void pcim_iounmap_regions(struct pci_dev *pdev, int mask);
2046 extern int pci_pci_problems;
2047 #define PCIPCI_FAIL 1 /* No PCI PCI DMA */
2048 #define PCIPCI_TRITON 2
2049 #define PCIPCI_NATOMA 4
2050 #define PCIPCI_VIAETBF 8
2051 #define PCIPCI_VSFX 16
2052 #define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
2053 #define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
2055 extern unsigned long pci_cardbus_io_size;
2056 extern unsigned long pci_cardbus_mem_size;
2057 extern u8 pci_dfl_cache_line_size;
2058 extern u8 pci_cache_line_size;
2060 /* Architecture-specific versions may override these (weak) */
2061 void pcibios_disable_device(struct pci_dev *dev);
2062 void pcibios_set_master(struct pci_dev *dev);
2063 int pcibios_set_pcie_reset_state(struct pci_dev *dev,
2064 enum pcie_reset_state state);
2065 int pcibios_add_device(struct pci_dev *dev);
2066 void pcibios_release_device(struct pci_dev *dev);
2068 void pcibios_penalize_isa_irq(int irq, int active);
2070 static inline void pcibios_penalize_isa_irq(int irq, int active) {}
2072 int pcibios_alloc_irq(struct pci_dev *dev);
2073 void pcibios_free_irq(struct pci_dev *dev);
2074 resource_size_t pcibios_default_alignment(void);
2076 #if defined(CONFIG_PCI_MMCONFIG) || defined(CONFIG_ACPI_MCFG)
2077 void __init pci_mmcfg_early_init(void);
2078 void __init pci_mmcfg_late_init(void);
2080 static inline void pci_mmcfg_early_init(void) { }
2081 static inline void pci_mmcfg_late_init(void) { }
2084 int pci_ext_cfg_avail(void);
2086 void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
2087 void __iomem *pci_ioremap_wc_bar(struct pci_dev *pdev, int bar);
2089 #ifdef CONFIG_PCI_IOV
2090 int pci_iov_virtfn_bus(struct pci_dev *dev, int id);
2091 int pci_iov_virtfn_devfn(struct pci_dev *dev, int id);
2093 int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
2094 void pci_disable_sriov(struct pci_dev *dev);
2096 int pci_iov_sysfs_link(struct pci_dev *dev, struct pci_dev *virtfn, int id);
2097 int pci_iov_add_virtfn(struct pci_dev *dev, int id);
2098 void pci_iov_remove_virtfn(struct pci_dev *dev, int id);
2099 int pci_num_vf(struct pci_dev *dev);
2100 int pci_vfs_assigned(struct pci_dev *dev);
2101 int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs);
2102 int pci_sriov_get_totalvfs(struct pci_dev *dev);
2103 int pci_sriov_configure_simple(struct pci_dev *dev, int nr_virtfn);
2104 resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno);
2105 void pci_vf_drivers_autoprobe(struct pci_dev *dev, bool probe);
2107 /* Arch may override these (weak) */
2108 int pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs);
2109 int pcibios_sriov_disable(struct pci_dev *pdev);
2110 resource_size_t pcibios_iov_resource_alignment(struct pci_dev *dev, int resno);
2112 static inline int pci_iov_virtfn_bus(struct pci_dev *dev, int id)
2116 static inline int pci_iov_virtfn_devfn(struct pci_dev *dev, int id)
2120 static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
2123 static inline int pci_iov_sysfs_link(struct pci_dev *dev,
2124 struct pci_dev *virtfn, int id)
2128 static inline int pci_iov_add_virtfn(struct pci_dev *dev, int id)
2132 static inline void pci_iov_remove_virtfn(struct pci_dev *dev,
2134 static inline void pci_disable_sriov(struct pci_dev *dev) { }
2135 static inline int pci_num_vf(struct pci_dev *dev) { return 0; }
2136 static inline int pci_vfs_assigned(struct pci_dev *dev)
2138 static inline int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs)
2140 static inline int pci_sriov_get_totalvfs(struct pci_dev *dev)
2142 #define pci_sriov_configure_simple NULL
2143 static inline resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno)
2145 static inline void pci_vf_drivers_autoprobe(struct pci_dev *dev, bool probe) { }
2148 #if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE)
2149 void pci_hp_create_module_link(struct pci_slot *pci_slot);
2150 void pci_hp_remove_module_link(struct pci_slot *pci_slot);
2154 * pci_pcie_cap - get the saved PCIe capability offset
2157 * PCIe capability offset is calculated at PCI device initialization
2158 * time and saved in the data structure. This function returns saved
2159 * PCIe capability offset. Using this instead of pci_find_capability()
2160 * reduces unnecessary search in the PCI configuration space. If you
2161 * need to calculate PCIe capability offset from raw device for some
2162 * reasons, please use pci_find_capability() instead.
2164 static inline int pci_pcie_cap(struct pci_dev *dev)
2166 return dev->pcie_cap;
2170 * pci_is_pcie - check if the PCI device is PCI Express capable
2173 * Returns: true if the PCI device is PCI Express capable, false otherwise.
2175 static inline bool pci_is_pcie(struct pci_dev *dev)
2177 return pci_pcie_cap(dev);
2181 * pcie_caps_reg - get the PCIe Capabilities Register
2184 static inline u16 pcie_caps_reg(const struct pci_dev *dev)
2186 return dev->pcie_flags_reg;
2190 * pci_pcie_type - get the PCIe device/port type
2193 static inline int pci_pcie_type(const struct pci_dev *dev)
2195 return (pcie_caps_reg(dev) & PCI_EXP_FLAGS_TYPE) >> 4;
2199 * pcie_find_root_port - Get the PCIe root port device
2202 * Traverse up the parent chain and return the PCIe Root Port PCI Device
2203 * for a given PCI/PCIe Device.
2205 static inline struct pci_dev *pcie_find_root_port(struct pci_dev *dev)
2208 if (pci_is_pcie(dev) &&
2209 pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT)
2211 dev = pci_upstream_bridge(dev);
2217 void pci_request_acs(void);
2218 bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags);
2219 bool pci_acs_path_enabled(struct pci_dev *start,
2220 struct pci_dev *end, u16 acs_flags);
2221 int pci_enable_atomic_ops_to_root(struct pci_dev *dev, u32 cap_mask);
2223 #define PCI_VPD_LRDT 0x80 /* Large Resource Data Type */
2224 #define PCI_VPD_LRDT_ID(x) ((x) | PCI_VPD_LRDT)
2226 /* Large Resource Data Type Tag Item Names */
2227 #define PCI_VPD_LTIN_ID_STRING 0x02 /* Identifier String */
2228 #define PCI_VPD_LTIN_RO_DATA 0x10 /* Read-Only Data */
2229 #define PCI_VPD_LTIN_RW_DATA 0x11 /* Read-Write Data */
2231 #define PCI_VPD_LRDT_ID_STRING PCI_VPD_LRDT_ID(PCI_VPD_LTIN_ID_STRING)
2232 #define PCI_VPD_LRDT_RO_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RO_DATA)
2233 #define PCI_VPD_LRDT_RW_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RW_DATA)
2235 /* Small Resource Data Type Tag Item Names */
2236 #define PCI_VPD_STIN_END 0x0f /* End */
2238 #define PCI_VPD_SRDT_END (PCI_VPD_STIN_END << 3)
2240 #define PCI_VPD_SRDT_TIN_MASK 0x78
2241 #define PCI_VPD_SRDT_LEN_MASK 0x07
2242 #define PCI_VPD_LRDT_TIN_MASK 0x7f
2244 #define PCI_VPD_LRDT_TAG_SIZE 3
2245 #define PCI_VPD_SRDT_TAG_SIZE 1
2247 #define PCI_VPD_INFO_FLD_HDR_SIZE 3
2249 #define PCI_VPD_RO_KEYWORD_PARTNO "PN"
2250 #define PCI_VPD_RO_KEYWORD_SERIALNO "SN"
2251 #define PCI_VPD_RO_KEYWORD_MFR_ID "MN"
2252 #define PCI_VPD_RO_KEYWORD_VENDOR0 "V0"
2253 #define PCI_VPD_RO_KEYWORD_CHKSUM "RV"
2256 * pci_vpd_lrdt_size - Extracts the Large Resource Data Type length
2257 * @lrdt: Pointer to the beginning of the Large Resource Data Type tag
2259 * Returns the extracted Large Resource Data Type length.
2261 static inline u16 pci_vpd_lrdt_size(const u8 *lrdt)
2263 return (u16)lrdt[1] + ((u16)lrdt[2] << 8);
2267 * pci_vpd_lrdt_tag - Extracts the Large Resource Data Type Tag Item
2268 * @lrdt: Pointer to the beginning of the Large Resource Data Type tag
2270 * Returns the extracted Large Resource Data Type Tag item.
2272 static inline u16 pci_vpd_lrdt_tag(const u8 *lrdt)
2274 return (u16)(lrdt[0] & PCI_VPD_LRDT_TIN_MASK);
2278 * pci_vpd_srdt_size - Extracts the Small Resource Data Type length
2279 * @srdt: Pointer to the beginning of the Small Resource Data Type tag
2281 * Returns the extracted Small Resource Data Type length.
2283 static inline u8 pci_vpd_srdt_size(const u8 *srdt)
2285 return (*srdt) & PCI_VPD_SRDT_LEN_MASK;
2289 * pci_vpd_srdt_tag - Extracts the Small Resource Data Type Tag Item
2290 * @srdt: Pointer to the beginning of the Small Resource Data Type tag
2292 * Returns the extracted Small Resource Data Type Tag Item.
2294 static inline u8 pci_vpd_srdt_tag(const u8 *srdt)
2296 return ((*srdt) & PCI_VPD_SRDT_TIN_MASK) >> 3;
2300 * pci_vpd_info_field_size - Extracts the information field length
2301 * @info_field: Pointer to the beginning of an information field header
2303 * Returns the extracted information field length.
2305 static inline u8 pci_vpd_info_field_size(const u8 *info_field)
2307 return info_field[2];
2311 * pci_vpd_find_tag - Locates the Resource Data Type tag provided
2312 * @buf: Pointer to buffered vpd data
2313 * @len: The length of the vpd buffer
2314 * @rdt: The Resource Data Type to search for
2316 * Returns the index where the Resource Data Type was found or
2317 * -ENOENT otherwise.
2319 int pci_vpd_find_tag(const u8 *buf, unsigned int len, u8 rdt);
2322 * pci_vpd_find_info_keyword - Locates an information field keyword in the VPD
2323 * @buf: Pointer to buffered vpd data
2324 * @off: The offset into the buffer at which to begin the search
2325 * @len: The length of the buffer area, relative to off, in which to search
2326 * @kw: The keyword to search for
2328 * Returns the index where the information field keyword was found or
2329 * -ENOENT otherwise.
2331 int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off,
2332 unsigned int len, const char *kw);
2334 /* PCI <-> OF binding helpers */
2338 struct irq_domain *pci_host_bridge_of_msi_domain(struct pci_bus *bus);
2339 bool pci_host_of_has_msi_map(struct device *dev);
2341 /* Arch may override this (weak) */
2342 struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus);
2344 #else /* CONFIG_OF */
2345 static inline struct irq_domain *
2346 pci_host_bridge_of_msi_domain(struct pci_bus *bus) { return NULL; }
2347 static inline bool pci_host_of_has_msi_map(struct device *dev) { return false; }
2348 #endif /* CONFIG_OF */
2350 static inline struct device_node *
2351 pci_device_to_OF_node(const struct pci_dev *pdev)
2353 return pdev ? pdev->dev.of_node : NULL;
2356 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
2358 return bus ? bus->dev.of_node : NULL;
2362 struct irq_domain *pci_host_bridge_acpi_msi_domain(struct pci_bus *bus);
2365 pci_msi_register_fwnode_provider(struct fwnode_handle *(*fn)(struct device *));
2366 bool pci_pr3_present(struct pci_dev *pdev);
2368 static inline struct irq_domain *
2369 pci_host_bridge_acpi_msi_domain(struct pci_bus *bus) { return NULL; }
2370 static inline bool pci_pr3_present(struct pci_dev *pdev) { return false; }
2374 static inline struct eeh_dev *pci_dev_to_eeh_dev(struct pci_dev *pdev)
2376 return pdev->dev.archdata.edev;
2380 void pci_add_dma_alias(struct pci_dev *dev, u8 devfn_from, unsigned nr_devfns);
2381 bool pci_devs_are_dma_aliases(struct pci_dev *dev1, struct pci_dev *dev2);
2382 int pci_for_each_dma_alias(struct pci_dev *pdev,
2383 int (*fn)(struct pci_dev *pdev,
2384 u16 alias, void *data), void *data);
2386 /* Helper functions for operation of device flag */
2387 static inline void pci_set_dev_assigned(struct pci_dev *pdev)
2389 pdev->dev_flags |= PCI_DEV_FLAGS_ASSIGNED;
2391 static inline void pci_clear_dev_assigned(struct pci_dev *pdev)
2393 pdev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED;
2395 static inline bool pci_is_dev_assigned(struct pci_dev *pdev)
2397 return (pdev->dev_flags & PCI_DEV_FLAGS_ASSIGNED) == PCI_DEV_FLAGS_ASSIGNED;
2401 * pci_ari_enabled - query ARI forwarding status
2404 * Returns true if ARI forwarding is enabled.
2406 static inline bool pci_ari_enabled(struct pci_bus *bus)
2408 return bus->self && bus->self->ari_enabled;
2412 * pci_is_thunderbolt_attached - whether device is on a Thunderbolt daisy chain
2413 * @pdev: PCI device to check
2415 * Walk upwards from @pdev and check for each encountered bridge if it's part
2416 * of a Thunderbolt controller. Reaching the host bridge means @pdev is not
2417 * Thunderbolt-attached. (But rather soldered to the mainboard usually.)
2419 static inline bool pci_is_thunderbolt_attached(struct pci_dev *pdev)
2421 struct pci_dev *parent = pdev;
2423 if (pdev->is_thunderbolt)
2426 while ((parent = pci_upstream_bridge(parent)))
2427 if (parent->is_thunderbolt)
2433 #if defined(CONFIG_PCIEPORTBUS) || defined(CONFIG_EEH)
2434 void pci_uevent_ers(struct pci_dev *pdev, enum pci_ers_result err_type);
2437 /* Provide the legacy pci_dma_* API */
2438 #include <linux/pci-dma-compat.h>
2440 #define pci_printk(level, pdev, fmt, arg...) \
2441 dev_printk(level, &(pdev)->dev, fmt, ##arg)
2443 #define pci_emerg(pdev, fmt, arg...) dev_emerg(&(pdev)->dev, fmt, ##arg)
2444 #define pci_alert(pdev, fmt, arg...) dev_alert(&(pdev)->dev, fmt, ##arg)
2445 #define pci_crit(pdev, fmt, arg...) dev_crit(&(pdev)->dev, fmt, ##arg)
2446 #define pci_err(pdev, fmt, arg...) dev_err(&(pdev)->dev, fmt, ##arg)
2447 #define pci_warn(pdev, fmt, arg...) dev_warn(&(pdev)->dev, fmt, ##arg)
2448 #define pci_notice(pdev, fmt, arg...) dev_notice(&(pdev)->dev, fmt, ##arg)
2449 #define pci_info(pdev, fmt, arg...) dev_info(&(pdev)->dev, fmt, ##arg)
2450 #define pci_dbg(pdev, fmt, arg...) dev_dbg(&(pdev)->dev, fmt, ##arg)
2452 #define pci_notice_ratelimited(pdev, fmt, arg...) \
2453 dev_notice_ratelimited(&(pdev)->dev, fmt, ##arg)
2455 #define pci_info_ratelimited(pdev, fmt, arg...) \
2456 dev_info_ratelimited(&(pdev)->dev, fmt, ##arg)
2458 #define pci_WARN(pdev, condition, fmt, arg...) \
2459 WARN(condition, "%s %s: " fmt, \
2460 dev_driver_string(&(pdev)->dev), pci_name(pdev), ##arg)
2462 #define pci_WARN_ONCE(pdev, condition, fmt, arg...) \
2463 WARN_ONCE(condition, "%s %s: " fmt, \
2464 dev_driver_string(&(pdev)->dev), pci_name(pdev), ##arg)
2466 #endif /* LINUX_PCI_H */