#ifndef DRIVERS_PCI_H #define DRIVERS_PCI_H #include #define PCI_CFG_SPACE_SIZE 256 #define PCI_CFG_SPACE_EXP_SIZE 4096 /* Functions internal to the PCI core code */ extern int pci_uevent(struct device *dev, struct kobj_uevent_env *env); extern int pci_create_sysfs_dev_files(struct pci_dev *pdev); extern void pci_remove_sysfs_dev_files(struct pci_dev *pdev); #if !defined(CONFIG_DMI) && !defined(CONFIG_ACPI) static inline void pci_create_firmware_label_files(struct pci_dev *pdev) { return; } static inline void pci_remove_firmware_label_files(struct pci_dev *pdev) { return; } #else extern void pci_create_firmware_label_files(struct pci_dev *pdev); extern void pci_remove_firmware_label_files(struct pci_dev *pdev); #endif extern void pci_cleanup_rom(struct pci_dev *dev); #ifdef HAVE_PCI_MMAP enum pci_mmap_api { PCI_MMAP_SYSFS, /* mmap on /sys/bus/pci/devices//resource */ PCI_MMAP_PROCFS /* mmap on /proc/bus/pci/ */ }; extern int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vmai, enum pci_mmap_api mmap_api); #endif int pci_probe_reset_function(struct pci_dev *dev); /** * struct pci_platform_pm_ops - Firmware PM callbacks * * @is_manageable: returns 'true' if given device is power manageable by the * platform firmware * * @set_state: invokes the platform firmware to set the device's power state * * @choose_state: returns PCI power state of given device preferred by the * platform; to be used during system-wide transitions from a * sleeping state to the working state and vice versa * * @can_wakeup: returns 'true' if given device is capable of waking up the * system from a sleeping state * * @sleep_wake: enables/disables the system wake up capability of given device * * @run_wake: enables/disables the platform to generate run-time wake-up events * for given device (the device's wake-up capability has to be * enabled by @sleep_wake for this feature to work) * * If given platform is generally capable of power managing PCI devices, all of * these callbacks are mandatory. */ struct pci_platform_pm_ops { bool (*is_manageable)(struct pci_dev *dev); int (*set_state)(struct pci_dev *dev, pci_power_t state); pci_power_t (*choose_state)(struct pci_dev *dev); bool (*can_wakeup)(struct pci_dev *dev); int (*sleep_wake)(struct pci_dev *dev, bool enable); int (*run_wake)(struct pci_dev *dev, bool enable); }; extern int pci_set_platform_pm(struct pci_platform_pm_ops *ops); extern void pci_update_current_state(struct pci_dev *dev, pci_power_t state); extern void pci_disable_enabled_device(struct pci_dev *dev); extern int pci_finish_runtime_suspend(struct pci_dev *dev); extern int __pci_pme_wakeup(struct pci_dev *dev, void *ign); extern void pci_pm_init(struct pci_dev *dev); extern void platform_pci_wakeup_init(struct pci_dev *dev); extern void pci_allocate_cap_save_buffers(struct pci_dev *dev); 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_is_bridge(struct pci_dev *pci_dev) { return !!(pci_dev->subordinate); } extern int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val); extern int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val); extern int pci_user_read_config_dword(struct pci_dev *dev, int where, u32 *val); extern int pci_user_write_config_byte(struct pci_dev *dev, int where, u8 val); extern int pci_user_write_config_word(struct pci_dev *dev, int where, u16 val); extern int pci_user_write_config_dword(struct pci_dev *dev, int where, u32 val); struct pci_vpd_ops { ssize_t (*read)(struct pci_dev *dev, loff_t pos, size_t count, void *buf); ssize_t (*write)(struct pci_dev *dev, loff_t pos, size_t count, const void *buf); void (*release)(struct pci_dev *dev); }; struct pci_vpd { unsigned int len; const struct pci_vpd_ops *ops; struct bin_attribute *attr; /* descriptor for sysfs VPD entry */ }; extern int pci_vpd_pci22_init(struct pci_dev *dev); static inline void pci_vpd_release(struct pci_dev *dev) { if (dev->vpd) dev->vpd->ops->release(dev); } /* PCI /proc functions */ #ifdef CONFIG_PROC_FS extern int pci_proc_attach_device(struct pci_dev *dev); extern int pci_proc_detach_device(struct pci_dev *dev); extern 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 */ extern unsigned int pci_do_scan_bus(struct pci_bus *bus); #ifdef HAVE_PCI_LEGACY extern void pci_create_legacy_files(struct pci_bus *bus); extern void pci_remove_legacy_files(struct pci_bus *bus); #else static inline void pci_create_legacy_files(struct pci_bus *bus) { return; } static inline void pci_remove_legacy_files(struct pci_bus *bus) { return; } #endif /* Lock for read/write access to pci device and bus lists */ extern struct rw_semaphore pci_bus_sem; extern unsigned int pci_pm_d3_delay; #ifdef CONFIG_PCI_MSI void pci_no_msi(void); extern void pci_msi_init_pci_dev(struct pci_dev *dev); #else static inline void pci_no_msi(void) { } static inline void pci_msi_init_pci_dev(struct pci_dev *dev) { } #endif 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); } extern struct device_attribute pci_dev_attrs[]; extern struct device_attribute pcibus_dev_attrs[]; #ifdef CONFIG_HOTPLUG extern struct bus_attribute pci_bus_attrs[]; #else #define pci_bus_attrs NULL #endif /** * 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; } struct pci_dev *pci_find_upstream_pcie_bridge(struct pci_dev *pdev); /* 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 io port BAR */ pci_bar_mem32, /* A 32-bit memory BAR */ pci_bar_mem64, /* A 64-bit memory BAR */ }; extern int pci_setup_device(struct pci_dev *dev); extern int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type, struct resource *res, unsigned int reg); extern int pci_resource_bar(struct pci_dev *dev, int resno, enum pci_bar_type *type); extern int pci_bus_add_child(struct pci_bus *bus); extern void pci_enable_ari(struct pci_dev *dev); /** * pci_ari_enabled - query ARI forwarding status * @bus: the PCI bus * * Returns 1 if ARI forwarding is enabled, or 0 if not enabled; */ static inline int pci_ari_enabled(struct pci_bus *bus) { return bus->self && bus->self->ari_enabled; } #ifdef CONFIG_PCI_QUIRKS extern int pci_is_reassigndev(struct pci_dev *dev); resource_size_t pci_specified_resource_alignment(struct pci_dev *dev); extern void pci_disable_bridge_window(struct pci_dev *dev); #endif /* 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; /* total VFs associated with the PF */ u16 initial; /* initial VFs associated with the PF */ u16 nr_virtfn; /* number of VFs available */ u16 offset; /* first VF Routing ID offset */ u16 stride; /* following VF stride */ u32 pgsz; /* page size for BAR alignment */ u8 link; /* Function Dependency Link */ struct pci_dev *dev; /* lowest numbered PF */ struct pci_dev *self; /* this PF */ struct mutex lock; /* lock for VF bus */ struct work_struct mtask; /* VF Migration task */ u8 __iomem *mstate; /* VF Migration State Array */ }; /* Address Translation Service */ struct pci_ats { int pos; /* capability position */ int stu; /* Smallest Translation Unit */ int qdep; /* Invalidate Queue Depth */ int ref_cnt; /* Physical Function reference count */ unsigned int is_enabled:1; /* Enable bit is set */ }; #ifdef CONFIG_PCI_IOV extern int pci_iov_init(struct pci_dev *dev); extern void pci_iov_release(struct pci_dev *dev); extern int pci_iov_resource_bar(struct pci_dev *dev, int resno, enum pci_bar_type *type); extern resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno); extern void pci_restore_iov_state(struct pci_dev *dev); extern int pci_iov_bus_range(struct pci_bus *bus); extern int pci_enable_ats(struct pci_dev *dev, int ps); extern void pci_disable_ats(struct pci_dev *dev); extern int pci_ats_queue_depth(struct pci_dev *dev); /** * pci_ats_enabled - query the ATS status * @dev: the PCI device * * Returns 1 if ATS capability is enabled, or 0 if not. */ static inline int pci_ats_enabled(struct pci_dev *dev) { return dev->ats && dev->ats->is_enabled; } #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 int pci_iov_resource_bar(struct pci_dev *dev, int resno, enum pci_bar_type *type) { return 0; } static inline void pci_restore_iov_state(struct pci_dev *dev) { } static inline int pci_iov_bus_range(struct pci_bus *bus) { return 0; } static inline int pci_enable_ats(struct pci_dev *dev, int ps) { return -ENODEV; } static inline void pci_disable_ats(struct pci_dev *dev) { } static inline int pci_ats_queue_depth(struct pci_dev *dev) { return -ENODEV; } static inline int pci_ats_enabled(struct pci_dev *dev) { return 0; } #endif /* CONFIG_PCI_IOV */ 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 return resource_alignment(res); } extern void pci_enable_acs(struct pci_dev *dev); struct pci_dev_reset_methods { u16 vendor; u16 device; int (*reset)(struct pci_dev *dev, int probe); }; #ifdef CONFIG_PCI_QUIRKS extern int pci_dev_specific_reset(struct pci_dev *dev, int probe); #else static inline int pci_dev_specific_reset(struct pci_dev *dev, int probe) { return -ENOTTY; } #endif #endif /* DRIVERS_PCI_H */