/* SPDX-License-Identifier: GPL-2.0-only */ #ifndef DEVICE_H #define DEVICE_H #include #include #include #include #include #include #include #include struct fw_config; struct device; struct pci_operations; struct i2c_bus_operations; struct smbus_bus_operations; struct pnp_mode_ops; struct spi_bus_operations; struct usb_bus_operations; struct gpio_operations; struct mdio_bus_operations; /* Chip operations */ struct chip_operations { void (*enable_dev)(struct device *dev); void (*init)(void *chip_info); void (*final)(void *chip_info); unsigned int initialized : 1; unsigned int finalized : 1; const char *name; }; struct bus; struct acpi_rsdp; struct device_operations { void (*read_resources)(struct device *dev); void (*set_resources)(struct device *dev); void (*enable_resources)(struct device *dev); void (*init)(struct device *dev); void (*final)(struct device *dev); void (*scan_bus)(struct device *bus); void (*enable)(struct device *dev); void (*vga_disable)(struct device *dev); void (*reset_bus)(struct bus *bus); int (*get_smbios_data)(struct device *dev, int *handle, unsigned long *current); void (*get_smbios_strings)(struct device *dev, struct smbios_type11 *t); unsigned long (*write_acpi_tables)(const struct device *dev, unsigned long start, struct acpi_rsdp *rsdp); void (*acpi_fill_ssdt)(const struct device *dev); const char *(*acpi_name)(const struct device *dev); /* Returns the optional _HID (Hardware ID) */ const char *(*acpi_hid)(const struct device *dev); const struct pci_operations *ops_pci; const struct i2c_bus_operations *ops_i2c_bus; const struct spi_bus_operations *ops_spi_bus; const struct smbus_bus_operations *ops_smbus_bus; const struct pnp_mode_ops *ops_pnp_mode; const struct gpio_operations *ops_gpio; const struct mdio_bus_operations *ops_mdio; }; /** * Standard device operations function pointers shims. */ static inline void noop_read_resources(struct device *dev) {} static inline void noop_set_resources(struct device *dev) {} struct bus { DEVTREE_CONST struct device *dev; /* This bridge device */ DEVTREE_CONST struct device *children; /* devices behind this bridge */ unsigned int bridge_ctrl; /* Bridge control register */ uint16_t bridge_cmd; /* Bridge command register */ uint16_t secondary; /* secondary bus number */ uint16_t subordinate; /* subordinate bus number */ uint16_t max_subordinate; /* max subordinate bus number */ uint8_t segment_group; /* PCI segment group */ unsigned int reset_needed : 1; unsigned int no_vga16 : 1; /* No support for 16-bit VGA decoding */ }; /* * There is one device structure for each slot-number/function-number * combination: */ struct device { DEVTREE_CONST struct bus *upstream; DEVTREE_CONST struct bus *downstream; DEVTREE_CONST struct device *sibling; /* next device on this bus */ DEVTREE_CONST struct device *next; /* chain of all devices */ struct device_path path; unsigned int vendor; unsigned int device; u16 subsystem_vendor; u16 subsystem_device; unsigned int class; /* 3 bytes: (base, sub, prog-if) */ unsigned int hdr_type; /* PCI header type */ unsigned int enabled : 1; /* set if we should enable the device */ unsigned int initialized : 1; /* 1 if we have initialized the device */ unsigned int on_mainboard : 1; unsigned int disable_pcie_aspm : 1; /* set if we should hide from UI */ unsigned int hidden : 1; /* set if this device is used even in minimum PCI cases */ unsigned int mandatory : 1; unsigned int hotplug_port : 1; u8 command; uint16_t hotplug_buses; /* Number of hotplug buses to allocate */ /* Base registers for this device. I/O, MEM and Expansion ROM */ DEVTREE_CONST struct resource *resource_list; #if !DEVTREE_EARLY struct device_operations *ops; struct chip_operations *chip_ops; const char *name; #if CONFIG(GENERATE_SMBIOS_TABLES) u8 smbios_slot_type; u8 smbios_slot_data_width; u8 smbios_slot_length; const char *smbios_slot_designation; #if CONFIG(SMBIOS_TYPE41_PROVIDED_BY_DEVTREE) /* * These fields are intentionally guarded so that attempts to use * the corresponding devicetree syntax without selecting the Kconfig * option result in build-time errors. Smaller size is a side effect. */ bool smbios_instance_id_valid; u8 smbios_instance_id; const char *smbios_refdes; #endif #endif #endif DEVTREE_CONST void *chip_info; /* Zero-terminated array of fields and options to probe. */ DEVTREE_CONST struct fw_config *probe_list; }; /** * This is the root of the device tree. The device tree is defined in the * static.c file and is generated by the config tool at compile time. */ extern DEVTREE_CONST struct device dev_root; /* list of all devices */ extern DEVTREE_CONST struct device * DEVTREE_CONST all_devices; extern struct resource *free_resources; extern struct bus *free_links; /* Generic device interface functions */ struct device *alloc_dev(struct bus *parent, struct device_path *path); struct bus *alloc_bus(struct device *parent); void dev_initialize_chips(void); void dev_enumerate(void); void dev_configure(void); void dev_enable(void); void dev_initialize(void); void dev_finalize(void); void dev_finalize_chips(void); /* Function used to override device state */ void devfn_disable(const struct bus *bus, unsigned int devfn); /* Generic device helper functions */ int reset_bus(struct bus *bus); void scan_bridges(struct bus *bus); void assign_resources(struct bus *bus); const char *dev_name(const struct device *dev); const char *dev_path(const struct device *dev); u32 dev_path_encode(const struct device *dev); struct device *dev_get_pci_domain(struct device *dev); void dev_set_enabled(struct device *dev, int enable); void disable_children(struct bus *bus); bool dev_is_active_bridge(struct device *dev); bool is_dev_enabled(const struct device *const dev); bool is_devfn_enabled(unsigned int devfn); bool is_cpu(const struct device *cpu); bool is_enabled_cpu(const struct device *cpu); bool is_pci(const struct device *pci); bool is_enabled_pci(const struct device *pci); bool is_pci_dev_on_bus(const struct device *pci, unsigned int bus); /* Returns whether there is a hotplug port on the path to the given device. */ bool dev_path_hotplug(const struct device *); /* Option ROM helper functions */ void run_bios(struct device *dev, unsigned long addr); /* Helper functions */ DEVTREE_CONST struct device *find_dev_path( const struct bus *parent, const struct device_path *path); DEVTREE_CONST struct device *find_dev_nested_path( const struct bus *parent, const struct device_path nested_path[], size_t nested_path_length); struct device *alloc_find_dev(struct bus *parent, struct device_path *path); struct device *dev_find_device(u16 vendor, u16 device, struct device *from); struct device *dev_find_class(unsigned int class, struct device *from); DEVTREE_CONST struct device *dev_find_path( DEVTREE_CONST struct device *prev_match, enum device_path_type path_type); struct device *dev_find_lapic(unsigned int apic_id); int dev_count_cpu(void); struct device *add_cpu_device(struct bus *cpu_bus, unsigned int apic_id, int enabled); void mp_init_cpus(DEVTREE_CONST struct bus *cpu_bus); static inline void mp_cpu_bus_init(struct device *dev) { /* Make sure the cpu cluster has a downstream bus for LAPICs to be allocated. */ struct bus *bus = alloc_bus(dev); mp_init_cpus(bus); } /* Debug functions */ void print_resource_tree(const struct device *root, int debug_level, const char *msg); void show_devs_tree(const struct device *dev, int debug_level, int depth); void show_devs_subtree(struct device *root, int debug_level, const char *msg); void show_all_devs(int debug_level, const char *msg); void show_all_devs_tree(int debug_level, const char *msg); void show_one_resource(int debug_level, struct device *dev, struct resource *resource, const char *comment); void show_all_devs_resources(int debug_level, const char *msg); /* Debug macros */ #if CONFIG(DEBUG_FUNC) #define DEV_FUNC_ENTER(dev) \ printk(BIOS_SPEW, "%s:%s:%d: ENTER (dev: %s)\n", \ __FILE__, __func__, __LINE__, dev_path(dev)) #define DEV_FUNC_EXIT(dev) \ printk(BIOS_SPEW, "%s:%s:%d: EXIT (dev: %s)\n", __FILE__, \ __func__, __LINE__, dev_path(dev)) #else /* DEBUG_FUNC */ #define DEV_FUNC_ENTER(dev) #define DEV_FUNC_EXIT(dev) #endif /* DEBUG_FUNC */ extern struct device_operations default_dev_ops_root; void pci_domain_read_resources(struct device *dev); void pci_domain_set_resources(struct device *dev); void pci_host_bridge_scan_bus(struct device *dev); void mmconf_resource(struct device *dev, unsigned long index); /* These are temporary resource constructors to get us through the migration away from open-coding all the IORESOURCE_FLAGS. */ const struct resource *fixed_resource_range_idx(struct device *dev, unsigned long index, uint64_t base, uint64_t size, unsigned long flags); static inline const struct resource *fixed_mem_range_flags(struct device *dev, unsigned long index, uint64_t base, uint64_t size, unsigned long flags) { return fixed_resource_range_idx(dev, index, base, size, IORESOURCE_MEM | flags); } static inline const struct resource *fixed_mem_from_to_flags(struct device *dev, unsigned long index, uint64_t base, uint64_t end, unsigned long flags) { if (end <= base) return NULL; return fixed_mem_range_flags(dev, index, base, end - base, flags); } static inline const struct resource *ram_range(struct device *dev, unsigned long index, uint64_t base, uint64_t size) { return fixed_mem_range_flags(dev, index, base, size, IORESOURCE_CACHEABLE | IORESOURCE_STORED); } static inline const struct resource *ram_from_to(struct device *dev, unsigned long index, uint64_t base, uint64_t end) { if (end <= base) return NULL; return ram_range(dev, index, base, end - base); } static inline const struct resource *reserved_ram_range(struct device *dev, unsigned long index, uint64_t base, uint64_t size) { return fixed_mem_range_flags(dev, index, base, size, IORESOURCE_CACHEABLE | IORESOURCE_RESERVE | IORESOURCE_STORED); } static inline const struct resource *reserved_ram_from_to(struct device *dev, unsigned long index, uint64_t base, uint64_t end) { if (end <= base) return NULL; return reserved_ram_range(dev, index, base, end - base); } static inline const struct resource *mmio_range(struct device *dev, unsigned long index, uint64_t base, uint64_t size) { return fixed_mem_range_flags(dev, index, base, size, IORESOURCE_RESERVE | IORESOURCE_STORED); } static inline const struct resource *mmio_from_to(struct device *dev, unsigned long index, uint64_t base, uint64_t end) { if (end <= base) return NULL; return mmio_range(dev, index, base, end - base); } const struct resource *lower_ram_end(struct device *dev, unsigned long index, uint64_t end); const struct resource *upper_ram_end(struct device *dev, unsigned long index, uint64_t end); #define bad_ram_range(...) reserved_ram_range(__VA_ARGS__) #define uma_range(...) mmio_range(__VA_ARGS__) #define uma_from_to(...) mmio_from_to(__VA_ARGS__) static inline const struct resource *fixed_io_range_flags(struct device *dev, unsigned long index, uint16_t base, uint16_t size, unsigned long flags) { return fixed_resource_range_idx(dev, index, base, size, IORESOURCE_IO | flags); } static inline const struct resource *fixed_io_from_to_flags(struct device *dev, unsigned long index, uint16_t base, uint16_t end, unsigned long flags) { if (end <= base) return NULL; return fixed_io_range_flags(dev, index, base, end - base, flags); } static inline const struct resource *fixed_io_range_reserved(struct device *dev, unsigned long index, uint16_t base, uint16_t size) { return fixed_io_range_flags(dev, index, base, size, IORESOURCE_RESERVE); } /* Compatibility code */ static inline void fixed_mem_resource_kb(struct device *dev, unsigned long index, unsigned long basek, unsigned long sizek, unsigned long flags) { fixed_mem_range_flags(dev, index, ((uint64_t)basek) << 10, ((uint64_t)sizek) << 10, IORESOURCE_STORED | flags); } /* It is the caller's responsibility to adjust regions such that ram_resource_kb() * and mmio_resource_kb() do not overlap. */ #define ram_resource_kb(dev, idx, basek, sizek) \ fixed_mem_resource_kb(dev, idx, basek, sizek, IORESOURCE_CACHEABLE) #define reserved_ram_resource_kb(dev, idx, basek, sizek) \ fixed_mem_resource_kb(dev, idx, basek, sizek, IORESOURCE_CACHEABLE \ | IORESOURCE_RESERVE) #define bad_ram_resource_kb(dev, idx, basek, sizek) \ reserved_ram_resource_kb((dev), (idx), (basek), (sizek)) #define uma_resource_kb(dev, idx, basek, sizek) \ fixed_mem_resource_kb(dev, idx, basek, sizek, IORESOURCE_RESERVE) #define mmio_resource_kb(dev, idx, basek, sizek) \ fixed_mem_resource_kb(dev, idx, basek, sizek, IORESOURCE_RESERVE) void tolm_test(void *gp, struct device *dev, struct resource *new); u32 find_pci_tolm(struct bus *bus); DEVTREE_CONST struct device *dev_find_next_pci_device( DEVTREE_CONST struct device *previous_dev); DEVTREE_CONST struct device *dev_find_slot_on_smbus(unsigned int bus, unsigned int addr); DEVTREE_CONST struct device *dev_find_slot_pnp(u16 port, u16 device); DEVTREE_CONST struct device *dev_bus_each_child(const struct bus *parent, DEVTREE_CONST struct device *prev_child); DEVTREE_CONST struct device *pcidev_path_behind(const struct bus *parent, pci_devfn_t devfn); DEVTREE_CONST struct device *pcidev_path_on_root(pci_devfn_t devfn); DEVTREE_CONST struct device *pcidev_path_on_bus(unsigned int bus, pci_devfn_t devfn); DEVTREE_CONST struct device *pcidev_on_root(uint8_t dev, uint8_t fn); DEVTREE_CONST struct bus *pci_root_bus(void); /* Find PCI device with given D#:F# sitting behind the given PCI-to-PCI bridge device. */ DEVTREE_CONST struct device *pcidev_path_behind_pci2pci_bridge( const struct device *bridge, pci_devfn_t devfn); /* To be deprecated, avoid using. * * Note that this function can return the incorrect device prior * to PCI enumeration because the secondary field of the bus object * is 0. The failing scenario is determined by the order of the * devices in all_devices singly-linked list as well as the time * when this function is called (secondary reflecting topology). */ DEVTREE_CONST struct device *pcidev_path_on_root_debug(pci_devfn_t devfn, const char *func); /* Robust discovery of chip_info. */ void devtree_bug(const char *func, pci_devfn_t devfn); void __noreturn devtree_die(void); /* * Dies if `dev` or `dev->chip_info` are NULL. Returns `dev->chip_info` otherwise. * * Only use if missing `chip_info` is fatal and we can't boot. If it's * not fatal, please handle the NULL case gracefully. */ static inline DEVTREE_CONST void *config_of(const struct device *dev) { if (dev && dev->chip_info) return dev->chip_info; devtree_die(); } /* * Returns pointer to config structure of root device (B:D:F = 0:00:0) defined by * sconfig in static.{h/c}. */ #define config_of_soc() __pci_0_00_0_config static inline bool is_root_device(const struct device *dev) { if (!dev || !dev->upstream) return false; return (dev->path.type == DEVICE_PATH_ROOT) || (dev->upstream->dev == dev); } void enable_static_device(struct device *dev); void enable_static_devices(struct device *bus); void scan_smbus(struct device *bus); void scan_generic_bus(struct device *bus); void scan_static_bus(struct device *bus); /* Macro to generate `struct device *` name that points to a device with the given alias. */ #define DEV_PTR(_alias) _dev_##_alias##_ptr /* Macro to generate weak `struct device *` definition that points to a device with the given alias. */ #define WEAK_DEV_PTR(_alias) \ __weak DEVTREE_CONST struct device *const DEV_PTR(_alias) #endif /* DEVICE_H */