| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef DRIVERS_PCI_H |
| #define DRIVERS_PCI_H |
| |
| #include <linux/pci.h> |
| |
| /* Number of possible devfns: 0.0 to 1f.7 inclusive */ |
| #define MAX_NR_DEVFNS 256 |
| |
| #define PCI_FIND_CAP_TTL 48 |
| |
| #define PCI_VSEC_ID_INTEL_TBT 0x1234 /* Thunderbolt */ |
| |
| #define PCIE_LINK_RETRAIN_TIMEOUT_MS 1000 |
| |
| /* Power stable to PERST# inactive from PCIe card Electromechanical Spec */ |
| #define PCIE_T_PVPERL_MS 100 |
| |
| /* |
| * PCIe r6.0, sec 5.3.3.2.1 <PME Synchronization> |
| * Recommends 1ms to 10ms timeout to check L2 ready. |
| */ |
| #define PCIE_PME_TO_L2_TIMEOUT_US 10000 |
| |
| extern const unsigned char pcie_link_speed[]; |
| extern bool pci_early_dump; |
| |
| bool pcie_cap_has_lnkctl(const struct pci_dev *dev); |
| bool pcie_cap_has_lnkctl2(const struct pci_dev *dev); |
| bool pcie_cap_has_rtctl(const struct pci_dev *dev); |
| |
| /* Functions internal to the PCI core code */ |
| |
| #ifdef CONFIG_DMI |
| extern const struct attribute_group pci_dev_smbios_attr_group; |
| #endif |
| |
| enum pci_mmap_api { |
| PCI_MMAP_SYSFS, /* mmap on /sys/bus/pci/devices/<BDF>/resource<N> */ |
| PCI_MMAP_PROCFS /* mmap on /proc/bus/pci/<BDF> */ |
| }; |
| int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vmai, |
| enum pci_mmap_api mmap_api); |
| |
| bool pci_reset_supported(struct pci_dev *dev); |
| void pci_init_reset_methods(struct pci_dev *dev); |
| int pci_bridge_secondary_bus_reset(struct pci_dev *dev); |
| int pci_bus_error_reset(struct pci_dev *dev); |
| |
| struct pci_cap_saved_data { |
| u16 cap_nr; |
| bool cap_extended; |
| unsigned int size; |
| u32 data[]; |
| }; |
| |
| struct pci_cap_saved_state { |
| struct hlist_node next; |
| struct pci_cap_saved_data cap; |
| }; |
| |
| void pci_allocate_cap_save_buffers(struct pci_dev *dev); |
| void pci_free_cap_save_buffers(struct pci_dev *dev); |
| int pci_add_cap_save_buffer(struct pci_dev *dev, char cap, unsigned int size); |
| int pci_add_ext_cap_save_buffer(struct pci_dev *dev, |
| u16 cap, unsigned int size); |
| struct pci_cap_saved_state *pci_find_saved_cap(struct pci_dev *dev, char cap); |
| struct pci_cap_saved_state *pci_find_saved_ext_cap(struct pci_dev *dev, |
| u16 cap); |
| |
| #define PCI_PM_D2_DELAY 200 /* usec; see PCIe r4.0, sec 5.9.1 */ |
| #define PCI_PM_D3HOT_WAIT 10 /* msec */ |
| #define PCI_PM_D3COLD_WAIT 100 /* msec */ |
| |
| void pci_update_current_state(struct pci_dev *dev, pci_power_t state); |
| void pci_refresh_power_state(struct pci_dev *dev); |
| int pci_power_up(struct pci_dev *dev); |
| void pci_disable_enabled_device(struct pci_dev *dev); |
| int pci_finish_runtime_suspend(struct pci_dev *dev); |
| void pcie_clear_device_status(struct pci_dev *dev); |
| void pcie_clear_root_pme_status(struct pci_dev *dev); |
| bool pci_check_pme_status(struct pci_dev *dev); |
| void pci_pme_wakeup_bus(struct pci_bus *bus); |
| int __pci_pme_wakeup(struct pci_dev *dev, void *ign); |
| void pci_pme_restore(struct pci_dev *dev); |
| bool pci_dev_need_resume(struct pci_dev *dev); |
| void pci_dev_adjust_pme(struct pci_dev *dev); |
| void pci_dev_complete_resume(struct pci_dev *pci_dev); |
| void pci_config_pm_runtime_get(struct pci_dev *dev); |
| void pci_config_pm_runtime_put(struct pci_dev *dev); |
| void pci_pm_init(struct pci_dev *dev); |
| void pci_ea_init(struct pci_dev *dev); |
| void pci_msi_init(struct pci_dev *dev); |
| void pci_msix_init(struct pci_dev *dev); |
| bool pci_bridge_d3_possible(struct pci_dev *dev); |
| void pci_bridge_d3_update(struct pci_dev *dev); |
| int pci_bridge_wait_for_secondary_bus(struct pci_dev *dev, char *reset_type); |
| |
| static inline void pci_wakeup_event(struct pci_dev *dev) |
| { |
| /* Wait 100 ms before the system can be put into a sleep state. */ |
| pm_wakeup_event(&dev->dev, 100); |
| } |
| |
| static inline bool pci_has_subordinate(struct pci_dev *pci_dev) |
| { |
| return !!(pci_dev->subordinate); |
| } |
| |
| static inline bool pci_power_manageable(struct pci_dev *pci_dev) |
| { |
| /* |
| * Currently we allow normal PCI devices and PCI bridges transition |
| * into D3 if their bridge_d3 is set. |
| */ |
| return !pci_has_subordinate(pci_dev) || pci_dev->bridge_d3; |
| } |
| |
| static inline bool pcie_downstream_port(const struct pci_dev *dev) |
| { |
| int type = pci_pcie_type(dev); |
| |
| return type == PCI_EXP_TYPE_ROOT_PORT || |
| type == PCI_EXP_TYPE_DOWNSTREAM || |
| type == PCI_EXP_TYPE_PCIE_BRIDGE; |
| } |
| |
| void pci_vpd_init(struct pci_dev *dev); |
| void pci_vpd_release(struct pci_dev *dev); |
| extern const struct attribute_group pci_dev_vpd_attr_group; |
| |
| /* PCI Virtual Channel */ |
| int pci_save_vc_state(struct pci_dev *dev); |
| void pci_restore_vc_state(struct pci_dev *dev); |
| void pci_allocate_vc_save_buffers(struct pci_dev *dev); |
| |
| /* PCI /proc functions */ |
| #ifdef CONFIG_PROC_FS |
| int pci_proc_attach_device(struct pci_dev *dev); |
| int pci_proc_detach_device(struct pci_dev *dev); |
| int pci_proc_detach_bus(struct pci_bus *bus); |
| #else |
| static inline int pci_proc_attach_device(struct pci_dev *dev) { return 0; } |
| static inline int pci_proc_detach_device(struct pci_dev *dev) { return 0; } |
| static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; } |
| #endif |
| |
| /* Functions for PCI Hotplug drivers to use */ |
| int pci_hp_add_bridge(struct pci_dev *dev); |
| |
| #if defined(CONFIG_SYSFS) && defined(HAVE_PCI_LEGACY) |
| void pci_create_legacy_files(struct pci_bus *bus); |
| void pci_remove_legacy_files(struct pci_bus *bus); |
| #else |
| static inline void pci_create_legacy_files(struct pci_bus *bus) { } |
| static inline void pci_remove_legacy_files(struct pci_bus *bus) { } |
| #endif |
| |
| /* Lock for read/write access to pci device and bus lists */ |
| extern struct rw_semaphore pci_bus_sem; |
| extern struct mutex pci_slot_mutex; |
| |
| extern raw_spinlock_t pci_lock; |
| |
| extern unsigned int pci_pm_d3hot_delay; |
| |
| #ifdef CONFIG_PCI_MSI |
| void pci_no_msi(void); |
| #else |
| static inline void pci_no_msi(void) { } |
| #endif |
| |
| void pci_realloc_get_opt(char *); |
| |
| static inline int pci_no_d1d2(struct pci_dev *dev) |
| { |
| unsigned int parent_dstates = 0; |
| |
| if (dev->bus->self) |
| parent_dstates = dev->bus->self->no_d1d2; |
| return (dev->no_d1d2 || parent_dstates); |
| |
| } |
| |
| #ifdef CONFIG_SYSFS |
| int pci_create_sysfs_dev_files(struct pci_dev *pdev); |
| void pci_remove_sysfs_dev_files(struct pci_dev *pdev); |
| extern const struct attribute_group *pci_dev_groups[]; |
| extern const struct attribute_group *pci_dev_attr_groups[]; |
| extern const struct attribute_group *pcibus_groups[]; |
| extern const struct attribute_group *pci_bus_groups[]; |
| #else |
| static inline int pci_create_sysfs_dev_files(struct pci_dev *pdev) { return 0; } |
| static inline void pci_remove_sysfs_dev_files(struct pci_dev *pdev) { } |
| #define pci_dev_groups NULL |
| #define pci_dev_attr_groups NULL |
| #define pcibus_groups NULL |
| #define pci_bus_groups NULL |
| #endif |
| |
| extern unsigned long pci_hotplug_io_size; |
| extern unsigned long pci_hotplug_mmio_size; |
| extern unsigned long pci_hotplug_mmio_pref_size; |
| extern unsigned long pci_hotplug_bus_size; |
| |
| /** |
| * pci_match_one_device - Tell if a PCI device structure has a matching |
| * PCI device id structure |
| * @id: single PCI device id structure to match |
| * @dev: the PCI device structure to match against |
| * |
| * Returns the matching pci_device_id structure or %NULL if there is no match. |
| */ |
| static inline const struct pci_device_id * |
| pci_match_one_device(const struct pci_device_id *id, const struct pci_dev *dev) |
| { |
| if ((id->vendor == PCI_ANY_ID || id->vendor == dev->vendor) && |
| (id->device == PCI_ANY_ID || id->device == dev->device) && |
| (id->subvendor == PCI_ANY_ID || id->subvendor == dev->subsystem_vendor) && |
| (id->subdevice == PCI_ANY_ID || id->subdevice == dev->subsystem_device) && |
| !((id->class ^ dev->class) & id->class_mask)) |
| return id; |
| return NULL; |
| } |
| |
| /* PCI slot sysfs helper code */ |
| #define to_pci_slot(s) container_of(s, struct pci_slot, kobj) |
| |
| extern struct kset *pci_slots_kset; |
| |
| struct pci_slot_attribute { |
| struct attribute attr; |
| ssize_t (*show)(struct pci_slot *, char *); |
| ssize_t (*store)(struct pci_slot *, const char *, size_t); |
| }; |
| #define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr) |
| |
| enum pci_bar_type { |
| pci_bar_unknown, /* Standard PCI BAR probe */ |
| pci_bar_io, /* An I/O port BAR */ |
| pci_bar_mem32, /* A 32-bit memory BAR */ |
| pci_bar_mem64, /* A 64-bit memory BAR */ |
| }; |
| |
| struct device *pci_get_host_bridge_device(struct pci_dev *dev); |
| void pci_put_host_bridge_device(struct device *dev); |
| |
| int pci_configure_extended_tags(struct pci_dev *dev, void *ign); |
| bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl, |
| int crs_timeout); |
| bool pci_bus_generic_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl, |
| int crs_timeout); |
| int pci_idt_bus_quirk(struct pci_bus *bus, int devfn, u32 *pl, int crs_timeout); |
| |
| int pci_setup_device(struct pci_dev *dev); |
| int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type, |
| struct resource *res, unsigned int reg); |
| void pci_configure_ari(struct pci_dev *dev); |
| void __pci_bus_size_bridges(struct pci_bus *bus, |
| struct list_head *realloc_head); |
| void __pci_bus_assign_resources(const struct pci_bus *bus, |
| struct list_head *realloc_head, |
| struct list_head *fail_head); |
| bool pci_bus_clip_resource(struct pci_dev *dev, int idx); |
| |
| const char *pci_resource_name(struct pci_dev *dev, unsigned int i); |
| |
| void pci_reassigndev_resource_alignment(struct pci_dev *dev); |
| void pci_disable_bridge_window(struct pci_dev *dev); |
| struct pci_bus *pci_bus_get(struct pci_bus *bus); |
| void pci_bus_put(struct pci_bus *bus); |
| |
| /* PCIe link information from Link Capabilities 2 */ |
| #define PCIE_LNKCAP2_SLS2SPEED(lnkcap2) \ |
| ((lnkcap2) & PCI_EXP_LNKCAP2_SLS_64_0GB ? PCIE_SPEED_64_0GT : \ |
| (lnkcap2) & PCI_EXP_LNKCAP2_SLS_32_0GB ? PCIE_SPEED_32_0GT : \ |
| (lnkcap2) & PCI_EXP_LNKCAP2_SLS_16_0GB ? PCIE_SPEED_16_0GT : \ |
| (lnkcap2) & PCI_EXP_LNKCAP2_SLS_8_0GB ? PCIE_SPEED_8_0GT : \ |
| (lnkcap2) & PCI_EXP_LNKCAP2_SLS_5_0GB ? PCIE_SPEED_5_0GT : \ |
| (lnkcap2) & PCI_EXP_LNKCAP2_SLS_2_5GB ? PCIE_SPEED_2_5GT : \ |
| PCI_SPEED_UNKNOWN) |
| |
| /* PCIe speed to Mb/s reduced by encoding overhead */ |
| #define PCIE_SPEED2MBS_ENC(speed) \ |
| ((speed) == PCIE_SPEED_64_0GT ? 64000*1/1 : \ |
| (speed) == PCIE_SPEED_32_0GT ? 32000*128/130 : \ |
| (speed) == PCIE_SPEED_16_0GT ? 16000*128/130 : \ |
| (speed) == PCIE_SPEED_8_0GT ? 8000*128/130 : \ |
| (speed) == PCIE_SPEED_5_0GT ? 5000*8/10 : \ |
| (speed) == PCIE_SPEED_2_5GT ? 2500*8/10 : \ |
| 0) |
| |
| const char *pci_speed_string(enum pci_bus_speed speed); |
| enum pci_bus_speed pcie_get_speed_cap(struct pci_dev *dev); |
| enum pcie_link_width pcie_get_width_cap(struct pci_dev *dev); |
| void __pcie_print_link_status(struct pci_dev *dev, bool verbose); |
| void pcie_report_downtraining(struct pci_dev *dev); |
| void pcie_update_link_speed(struct pci_bus *bus, u16 link_status); |
| |
| /* Single Root I/O Virtualization */ |
| struct pci_sriov { |
| int pos; /* Capability position */ |
| int nres; /* Number of resources */ |
| u32 cap; /* SR-IOV Capabilities */ |
| u16 ctrl; /* SR-IOV Control */ |
| u16 total_VFs; /* Total VFs associated with the PF */ |
| u16 initial_VFs; /* Initial VFs associated with the PF */ |
| u16 num_VFs; /* Number of VFs available */ |
| u16 offset; /* First VF Routing ID offset */ |
| u16 stride; /* Following VF stride */ |
| u16 vf_device; /* VF device ID */ |
| u32 pgsz; /* Page size for BAR alignment */ |
| u8 link; /* Function Dependency Link */ |
| u8 max_VF_buses; /* Max buses consumed by VFs */ |
| u16 driver_max_VFs; /* Max num VFs driver supports */ |
| struct pci_dev *dev; /* Lowest numbered PF */ |
| struct pci_dev *self; /* This PF */ |
| u32 class; /* VF device */ |
| u8 hdr_type; /* VF header type */ |
| u16 subsystem_vendor; /* VF subsystem vendor */ |
| u16 subsystem_device; /* VF subsystem device */ |
| resource_size_t barsz[PCI_SRIOV_NUM_BARS]; /* VF BAR size */ |
| bool drivers_autoprobe; /* Auto probing of VFs by driver */ |
| }; |
| |
| #ifdef CONFIG_PCI_DOE |
| void pci_doe_init(struct pci_dev *pdev); |
| void pci_doe_destroy(struct pci_dev *pdev); |
| void pci_doe_disconnected(struct pci_dev *pdev); |
| #else |
| static inline void pci_doe_init(struct pci_dev *pdev) { } |
| static inline void pci_doe_destroy(struct pci_dev *pdev) { } |
| static inline void pci_doe_disconnected(struct pci_dev *pdev) { } |
| #endif |
| |
| /** |
| * pci_dev_set_io_state - Set the new error state if possible. |
| * |
| * @dev: PCI device to set new error_state |
| * @new: the state we want dev to be in |
| * |
| * If the device is experiencing perm_failure, it has to remain in that state. |
| * Any other transition is allowed. |
| * |
| * Returns true if state has been changed to the requested state. |
| */ |
| static inline bool pci_dev_set_io_state(struct pci_dev *dev, |
| pci_channel_state_t new) |
| { |
| pci_channel_state_t old; |
| |
| switch (new) { |
| case pci_channel_io_perm_failure: |
| xchg(&dev->error_state, pci_channel_io_perm_failure); |
| return true; |
| case pci_channel_io_frozen: |
| old = cmpxchg(&dev->error_state, pci_channel_io_normal, |
| pci_channel_io_frozen); |
| return old != pci_channel_io_perm_failure; |
| case pci_channel_io_normal: |
| old = cmpxchg(&dev->error_state, pci_channel_io_frozen, |
| pci_channel_io_normal); |
| return old != pci_channel_io_perm_failure; |
| default: |
| return false; |
| } |
| } |
| |
| static inline int pci_dev_set_disconnected(struct pci_dev *dev, void *unused) |
| { |
| pci_dev_set_io_state(dev, pci_channel_io_perm_failure); |
| pci_doe_disconnected(dev); |
| |
| return 0; |
| } |
| |
| /* pci_dev priv_flags */ |
| #define PCI_DEV_ADDED 0 |
| #define PCI_DPC_RECOVERED 1 |
| #define PCI_DPC_RECOVERING 2 |
| |
| static inline void pci_dev_assign_added(struct pci_dev *dev, bool added) |
| { |
| assign_bit(PCI_DEV_ADDED, &dev->priv_flags, added); |
| } |
| |
| static inline bool pci_dev_is_added(const struct pci_dev *dev) |
| { |
| return test_bit(PCI_DEV_ADDED, &dev->priv_flags); |
| } |
| |
| #ifdef CONFIG_PCIEAER |
| #include <linux/aer.h> |
| |
| #define AER_MAX_MULTI_ERR_DEVICES 5 /* Not likely to have more */ |
| |
| struct aer_err_info { |
| struct pci_dev *dev[AER_MAX_MULTI_ERR_DEVICES]; |
| int error_dev_num; |
| |
| unsigned int id:16; |
| |
| unsigned int severity:2; /* 0:NONFATAL | 1:FATAL | 2:COR */ |
| unsigned int __pad1:5; |
| unsigned int multi_error_valid:1; |
| |
| unsigned int first_error:5; |
| unsigned int __pad2:2; |
| unsigned int tlp_header_valid:1; |
| |
| unsigned int status; /* COR/UNCOR Error Status */ |
| unsigned int mask; /* COR/UNCOR Error Mask */ |
| struct pcie_tlp_log tlp; /* TLP Header */ |
| }; |
| |
| int aer_get_device_error_info(struct pci_dev *dev, struct aer_err_info *info); |
| void aer_print_error(struct pci_dev *dev, struct aer_err_info *info); |
| #endif /* CONFIG_PCIEAER */ |
| |
| #ifdef CONFIG_PCIEPORTBUS |
| /* Cached RCEC Endpoint Association */ |
| struct rcec_ea { |
| u8 nextbusn; |
| u8 lastbusn; |
| u32 bitmap; |
| }; |
| #endif |
| |
| #ifdef CONFIG_PCIE_DPC |
| void pci_save_dpc_state(struct pci_dev *dev); |
| void pci_restore_dpc_state(struct pci_dev *dev); |
| void pci_dpc_init(struct pci_dev *pdev); |
| void dpc_process_error(struct pci_dev *pdev); |
| pci_ers_result_t dpc_reset_link(struct pci_dev *pdev); |
| bool pci_dpc_recovered(struct pci_dev *pdev); |
| #else |
| static inline void pci_save_dpc_state(struct pci_dev *dev) { } |
| static inline void pci_restore_dpc_state(struct pci_dev *dev) { } |
| static inline void pci_dpc_init(struct pci_dev *pdev) { } |
| static inline bool pci_dpc_recovered(struct pci_dev *pdev) { return false; } |
| #endif |
| |
| #ifdef CONFIG_PCIEPORTBUS |
| void pci_rcec_init(struct pci_dev *dev); |
| void pci_rcec_exit(struct pci_dev *dev); |
| void pcie_link_rcec(struct pci_dev *rcec); |
| void pcie_walk_rcec(struct pci_dev *rcec, |
| int (*cb)(struct pci_dev *, void *), |
| void *userdata); |
| #else |
| static inline void pci_rcec_init(struct pci_dev *dev) { } |
| static inline void pci_rcec_exit(struct pci_dev *dev) { } |
| static inline void pcie_link_rcec(struct pci_dev *rcec) { } |
| static inline void pcie_walk_rcec(struct pci_dev *rcec, |
| int (*cb)(struct pci_dev *, void *), |
| void *userdata) { } |
| #endif |
| |
| #ifdef CONFIG_PCI_ATS |
| /* Address Translation Service */ |
| void pci_ats_init(struct pci_dev *dev); |
| void pci_restore_ats_state(struct pci_dev *dev); |
| #else |
| static inline void pci_ats_init(struct pci_dev *d) { } |
| static inline void pci_restore_ats_state(struct pci_dev *dev) { } |
| #endif /* CONFIG_PCI_ATS */ |
| |
| #ifdef CONFIG_PCI_PRI |
| void pci_pri_init(struct pci_dev *dev); |
| void pci_restore_pri_state(struct pci_dev *pdev); |
| #else |
| static inline void pci_pri_init(struct pci_dev *dev) { } |
| static inline void pci_restore_pri_state(struct pci_dev *pdev) { } |
| #endif |
| |
| #ifdef CONFIG_PCI_PASID |
| void pci_pasid_init(struct pci_dev *dev); |
| void pci_restore_pasid_state(struct pci_dev *pdev); |
| #else |
| static inline void pci_pasid_init(struct pci_dev *dev) { } |
| static inline void pci_restore_pasid_state(struct pci_dev *pdev) { } |
| #endif |
| |
| #ifdef CONFIG_PCI_IOV |
| int pci_iov_init(struct pci_dev *dev); |
| void pci_iov_release(struct pci_dev *dev); |
| void pci_iov_remove(struct pci_dev *dev); |
| void pci_iov_update_resource(struct pci_dev *dev, int resno); |
| resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno); |
| void pci_restore_iov_state(struct pci_dev *dev); |
| int pci_iov_bus_range(struct pci_bus *bus); |
| extern const struct attribute_group sriov_pf_dev_attr_group; |
| extern const struct attribute_group sriov_vf_dev_attr_group; |
| #else |
| static inline int pci_iov_init(struct pci_dev *dev) |
| { |
| return -ENODEV; |
| } |
| static inline void pci_iov_release(struct pci_dev *dev) { } |
| static inline void pci_iov_remove(struct pci_dev *dev) { } |
| static inline void pci_restore_iov_state(struct pci_dev *dev) { } |
| static inline int pci_iov_bus_range(struct pci_bus *bus) |
| { |
| return 0; |
| } |
| |
| #endif /* CONFIG_PCI_IOV */ |
| |
| #ifdef CONFIG_PCIE_PTM |
| void pci_ptm_init(struct pci_dev *dev); |
| void pci_save_ptm_state(struct pci_dev *dev); |
| void pci_restore_ptm_state(struct pci_dev *dev); |
| void pci_suspend_ptm(struct pci_dev *dev); |
| void pci_resume_ptm(struct pci_dev *dev); |
| #else |
| static inline void pci_ptm_init(struct pci_dev *dev) { } |
| static inline void pci_save_ptm_state(struct pci_dev *dev) { } |
| static inline void pci_restore_ptm_state(struct pci_dev *dev) { } |
| static inline void pci_suspend_ptm(struct pci_dev *dev) { } |
| static inline void pci_resume_ptm(struct pci_dev *dev) { } |
| #endif |
| |
| unsigned long pci_cardbus_resource_alignment(struct resource *); |
| |
| static inline resource_size_t pci_resource_alignment(struct pci_dev *dev, |
| struct resource *res) |
| { |
| #ifdef CONFIG_PCI_IOV |
| int resno = res - dev->resource; |
| |
| if (resno >= PCI_IOV_RESOURCES && resno <= PCI_IOV_RESOURCE_END) |
| return pci_sriov_resource_alignment(dev, resno); |
| #endif |
| if (dev->class >> 8 == PCI_CLASS_BRIDGE_CARDBUS) |
| return pci_cardbus_resource_alignment(res); |
| return resource_alignment(res); |
| } |
| |
| void pci_acs_init(struct pci_dev *dev); |
| #ifdef CONFIG_PCI_QUIRKS |
| int pci_dev_specific_acs_enabled(struct pci_dev *dev, u16 acs_flags); |
| int pci_dev_specific_enable_acs(struct pci_dev *dev); |
| int pci_dev_specific_disable_acs_redir(struct pci_dev *dev); |
| bool pcie_failed_link_retrain(struct pci_dev *dev); |
| #else |
| static inline int pci_dev_specific_acs_enabled(struct pci_dev *dev, |
| u16 acs_flags) |
| { |
| return -ENOTTY; |
| } |
| static inline int pci_dev_specific_enable_acs(struct pci_dev *dev) |
| { |
| return -ENOTTY; |
| } |
| static inline int pci_dev_specific_disable_acs_redir(struct pci_dev *dev) |
| { |
| return -ENOTTY; |
| } |
| static inline bool pcie_failed_link_retrain(struct pci_dev *dev) |
| { |
| return false; |
| } |
| #endif |
| |
| /* PCI error reporting and recovery */ |
| pci_ers_result_t pcie_do_recovery(struct pci_dev *dev, |
| pci_channel_state_t state, |
| pci_ers_result_t (*reset_subordinates)(struct pci_dev *pdev)); |
| |
| bool pcie_wait_for_link(struct pci_dev *pdev, bool active); |
| int pcie_retrain_link(struct pci_dev *pdev, bool use_lt); |
| |
| /* ASPM-related functionality we need even without CONFIG_PCIEASPM */ |
| void pci_save_ltr_state(struct pci_dev *dev); |
| void pci_restore_ltr_state(struct pci_dev *dev); |
| void pci_configure_aspm_l1ss(struct pci_dev *dev); |
| void pci_save_aspm_l1ss_state(struct pci_dev *dev); |
| void pci_restore_aspm_l1ss_state(struct pci_dev *dev); |
| |
| #ifdef CONFIG_PCIEASPM |
| void pcie_aspm_init_link_state(struct pci_dev *pdev); |
| void pcie_aspm_exit_link_state(struct pci_dev *pdev); |
| void pcie_aspm_pm_state_change(struct pci_dev *pdev, bool locked); |
| void pcie_aspm_powersave_config_link(struct pci_dev *pdev); |
| void pci_configure_ltr(struct pci_dev *pdev); |
| void pci_bridge_reconfigure_ltr(struct pci_dev *pdev); |
| #else |
| static inline void pcie_aspm_init_link_state(struct pci_dev *pdev) { } |
| static inline void pcie_aspm_exit_link_state(struct pci_dev *pdev) { } |
| static inline void pcie_aspm_pm_state_change(struct pci_dev *pdev, bool locked) { } |
| static inline void pcie_aspm_powersave_config_link(struct pci_dev *pdev) { } |
| static inline void pci_configure_ltr(struct pci_dev *pdev) { } |
| static inline void pci_bridge_reconfigure_ltr(struct pci_dev *pdev) { } |
| #endif |
| |
| #ifdef CONFIG_PCIE_ECRC |
| void pcie_set_ecrc_checking(struct pci_dev *dev); |
| void pcie_ecrc_get_policy(char *str); |
| #else |
| static inline void pcie_set_ecrc_checking(struct pci_dev *dev) { } |
| static inline void pcie_ecrc_get_policy(char *str) { } |
| #endif |
| |
| struct pci_dev_reset_methods { |
| u16 vendor; |
| u16 device; |
| int (*reset)(struct pci_dev *dev, bool probe); |
| }; |
| |
| struct pci_reset_fn_method { |
| int (*reset_fn)(struct pci_dev *pdev, bool probe); |
| char *name; |
| }; |
| |
| #ifdef CONFIG_PCI_QUIRKS |
| int pci_dev_specific_reset(struct pci_dev *dev, bool probe); |
| #else |
| static inline int pci_dev_specific_reset(struct pci_dev *dev, bool probe) |
| { |
| return -ENOTTY; |
| } |
| #endif |
| |
| #if defined(CONFIG_PCI_QUIRKS) && defined(CONFIG_ARM64) |
| int acpi_get_rc_resources(struct device *dev, const char *hid, u16 segment, |
| struct resource *res); |
| #else |
| static inline int acpi_get_rc_resources(struct device *dev, const char *hid, |
| u16 segment, struct resource *res) |
| { |
| return -ENODEV; |
| } |
| #endif |
| |
| int pci_rebar_get_current_size(struct pci_dev *pdev, int bar); |
| int pci_rebar_set_size(struct pci_dev *pdev, int bar, int size); |
| static inline u64 pci_rebar_size_to_bytes(int size) |
| { |
| return 1ULL << (size + 20); |
| } |
| |
| struct device_node; |
| |
| #ifdef CONFIG_OF |
| int of_pci_parse_bus_range(struct device_node *node, struct resource *res); |
| int of_get_pci_domain_nr(struct device_node *node); |
| int of_pci_get_max_link_speed(struct device_node *node); |
| u32 of_pci_get_slot_power_limit(struct device_node *node, |
| u8 *slot_power_limit_value, |
| u8 *slot_power_limit_scale); |
| int pci_set_of_node(struct pci_dev *dev); |
| void pci_release_of_node(struct pci_dev *dev); |
| void pci_set_bus_of_node(struct pci_bus *bus); |
| void pci_release_bus_of_node(struct pci_bus *bus); |
| |
| int devm_of_pci_bridge_init(struct device *dev, struct pci_host_bridge *bridge); |
| |
| #else |
| static inline int |
| of_pci_parse_bus_range(struct device_node *node, struct resource *res) |
| { |
| return -EINVAL; |
| } |
| |
| static inline int |
| of_get_pci_domain_nr(struct device_node *node) |
| { |
| return -1; |
| } |
| |
| static inline int |
| of_pci_get_max_link_speed(struct device_node *node) |
| { |
| return -EINVAL; |
| } |
| |
| static inline u32 |
| of_pci_get_slot_power_limit(struct device_node *node, |
| u8 *slot_power_limit_value, |
| u8 *slot_power_limit_scale) |
| { |
| if (slot_power_limit_value) |
| *slot_power_limit_value = 0; |
| if (slot_power_limit_scale) |
| *slot_power_limit_scale = 0; |
| return 0; |
| } |
| |
| static inline int pci_set_of_node(struct pci_dev *dev) { return 0; } |
| static inline void pci_release_of_node(struct pci_dev *dev) { } |
| static inline void pci_set_bus_of_node(struct pci_bus *bus) { } |
| static inline void pci_release_bus_of_node(struct pci_bus *bus) { } |
| |
| static inline int devm_of_pci_bridge_init(struct device *dev, struct pci_host_bridge *bridge) |
| { |
| return 0; |
| } |
| |
| #endif /* CONFIG_OF */ |
| |
| struct of_changeset; |
| |
| #ifdef CONFIG_PCI_DYNAMIC_OF_NODES |
| void of_pci_make_dev_node(struct pci_dev *pdev); |
| void of_pci_remove_node(struct pci_dev *pdev); |
| int of_pci_add_properties(struct pci_dev *pdev, struct of_changeset *ocs, |
| struct device_node *np); |
| #else |
| static inline void of_pci_make_dev_node(struct pci_dev *pdev) { } |
| static inline void of_pci_remove_node(struct pci_dev *pdev) { } |
| #endif |
| |
| #ifdef CONFIG_PCIEAER |
| void pci_no_aer(void); |
| void pci_aer_init(struct pci_dev *dev); |
| void pci_aer_exit(struct pci_dev *dev); |
| extern const struct attribute_group aer_stats_attr_group; |
| void pci_aer_clear_fatal_status(struct pci_dev *dev); |
| int pci_aer_clear_status(struct pci_dev *dev); |
| int pci_aer_raw_clear_status(struct pci_dev *dev); |
| void pci_save_aer_state(struct pci_dev *dev); |
| void pci_restore_aer_state(struct pci_dev *dev); |
| #else |
| static inline void pci_no_aer(void) { } |
| static inline void pci_aer_init(struct pci_dev *d) { } |
| static inline void pci_aer_exit(struct pci_dev *d) { } |
| static inline void pci_aer_clear_fatal_status(struct pci_dev *dev) { } |
| static inline int pci_aer_clear_status(struct pci_dev *dev) { return -EINVAL; } |
| static inline int pci_aer_raw_clear_status(struct pci_dev *dev) { return -EINVAL; } |
| static inline void pci_save_aer_state(struct pci_dev *dev) { } |
| static inline void pci_restore_aer_state(struct pci_dev *dev) { } |
| #endif |
| |
| #ifdef CONFIG_ACPI |
| int pci_acpi_program_hp_params(struct pci_dev *dev); |
| extern const struct attribute_group pci_dev_acpi_attr_group; |
| void pci_set_acpi_fwnode(struct pci_dev *dev); |
| int pci_dev_acpi_reset(struct pci_dev *dev, bool probe); |
| bool acpi_pci_power_manageable(struct pci_dev *dev); |
| bool acpi_pci_bridge_d3(struct pci_dev *dev); |
| int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state); |
| pci_power_t acpi_pci_get_power_state(struct pci_dev *dev); |
| void acpi_pci_refresh_power_state(struct pci_dev *dev); |
| int acpi_pci_wakeup(struct pci_dev *dev, bool enable); |
| bool acpi_pci_need_resume(struct pci_dev *dev); |
| pci_power_t acpi_pci_choose_state(struct pci_dev *pdev); |
| #else |
| static inline int pci_dev_acpi_reset(struct pci_dev *dev, bool probe) |
| { |
| return -ENOTTY; |
| } |
| static inline void pci_set_acpi_fwnode(struct pci_dev *dev) { } |
| static inline int pci_acpi_program_hp_params(struct pci_dev *dev) |
| { |
| return -ENODEV; |
| } |
| static inline bool acpi_pci_power_manageable(struct pci_dev *dev) |
| { |
| return false; |
| } |
| static inline bool acpi_pci_bridge_d3(struct pci_dev *dev) |
| { |
| return false; |
| } |
| static inline int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state) |
| { |
| return -ENODEV; |
| } |
| static inline pci_power_t acpi_pci_get_power_state(struct pci_dev *dev) |
| { |
| return PCI_UNKNOWN; |
| } |
| static inline void acpi_pci_refresh_power_state(struct pci_dev *dev) { } |
| static inline int acpi_pci_wakeup(struct pci_dev *dev, bool enable) |
| { |
| return -ENODEV; |
| } |
| static inline bool acpi_pci_need_resume(struct pci_dev *dev) |
| { |
| return false; |
| } |
| static inline pci_power_t acpi_pci_choose_state(struct pci_dev *pdev) |
| { |
| return PCI_POWER_ERROR; |
| } |
| #endif |
| |
| #ifdef CONFIG_PCIEASPM |
| extern const struct attribute_group aspm_ctrl_attr_group; |
| #endif |
| |
| extern const struct attribute_group pci_dev_reset_method_attr_group; |
| |
| #ifdef CONFIG_X86_INTEL_MID |
| bool pci_use_mid_pm(void); |
| int mid_pci_set_power_state(struct pci_dev *pdev, pci_power_t state); |
| pci_power_t mid_pci_get_power_state(struct pci_dev *pdev); |
| #else |
| static inline bool pci_use_mid_pm(void) |
| { |
| return false; |
| } |
| static inline int mid_pci_set_power_state(struct pci_dev *pdev, pci_power_t state) |
| { |
| return -ENODEV; |
| } |
| static inline pci_power_t mid_pci_get_power_state(struct pci_dev *pdev) |
| { |
| return PCI_UNKNOWN; |
| } |
| #endif |
| |
| /* |
| * Managed PCI resources. This manages device on/off, INTx/MSI/MSI-X |
| * on/off and BAR regions. pci_dev itself records MSI/MSI-X status, so |
| * there's no need to track it separately. pci_devres is initialized |
| * when a device is enabled using managed PCI device enable interface. |
| * |
| * TODO: Struct pci_devres and find_pci_dr() only need to be here because |
| * they're used in pci.c. Port or move these functions to devres.c and |
| * then remove them from here. |
| */ |
| struct pci_devres { |
| unsigned int enabled:1; |
| unsigned int pinned:1; |
| unsigned int orig_intx:1; |
| unsigned int restore_intx:1; |
| unsigned int mwi:1; |
| u32 region_mask; |
| }; |
| |
| struct pci_devres *find_pci_dr(struct pci_dev *pdev); |
| |
| /* |
| * Config Address for PCI Configuration Mechanism #1 |
| * |
| * See PCI Local Bus Specification, Revision 3.0, |
| * Section 3.2.2.3.2, Figure 3-2, p. 50. |
| */ |
| |
| #define PCI_CONF1_BUS_SHIFT 16 /* Bus number */ |
| #define PCI_CONF1_DEV_SHIFT 11 /* Device number */ |
| #define PCI_CONF1_FUNC_SHIFT 8 /* Function number */ |
| |
| #define PCI_CONF1_BUS_MASK 0xff |
| #define PCI_CONF1_DEV_MASK 0x1f |
| #define PCI_CONF1_FUNC_MASK 0x7 |
| #define PCI_CONF1_REG_MASK 0xfc /* Limit aligned offset to a maximum of 256B */ |
| |
| #define PCI_CONF1_ENABLE BIT(31) |
| #define PCI_CONF1_BUS(x) (((x) & PCI_CONF1_BUS_MASK) << PCI_CONF1_BUS_SHIFT) |
| #define PCI_CONF1_DEV(x) (((x) & PCI_CONF1_DEV_MASK) << PCI_CONF1_DEV_SHIFT) |
| #define PCI_CONF1_FUNC(x) (((x) & PCI_CONF1_FUNC_MASK) << PCI_CONF1_FUNC_SHIFT) |
| #define PCI_CONF1_REG(x) ((x) & PCI_CONF1_REG_MASK) |
| |
| #define PCI_CONF1_ADDRESS(bus, dev, func, reg) \ |
| (PCI_CONF1_ENABLE | \ |
| PCI_CONF1_BUS(bus) | \ |
| PCI_CONF1_DEV(dev) | \ |
| PCI_CONF1_FUNC(func) | \ |
| PCI_CONF1_REG(reg)) |
| |
| /* |
| * Extension of PCI Config Address for accessing extended PCIe registers |
| * |
| * No standardized specification, but used on lot of non-ECAM-compliant ARM SoCs |
| * or on AMD Barcelona and new CPUs. Reserved bits [27:24] of PCI Config Address |
| * are used for specifying additional 4 high bits of PCI Express register. |
| */ |
| |
| #define PCI_CONF1_EXT_REG_SHIFT 16 |
| #define PCI_CONF1_EXT_REG_MASK 0xf00 |
| #define PCI_CONF1_EXT_REG(x) (((x) & PCI_CONF1_EXT_REG_MASK) << PCI_CONF1_EXT_REG_SHIFT) |
| |
| #define PCI_CONF1_EXT_ADDRESS(bus, dev, func, reg) \ |
| (PCI_CONF1_ADDRESS(bus, dev, func, reg) | \ |
| PCI_CONF1_EXT_REG(reg)) |
| |
| #endif /* DRIVERS_PCI_H */ |
