/* * pci.h * * PCI defines and function prototypes * Copyright 1994, Drew Eckhardt * Copyright 1997--1999 Martin Mares * * For more information, please consult the following manuals (look at * http://www.pcisig.com/ for how to get them): * * PCI BIOS Specification * PCI Local Bus Specification * PCI to PCI Bridge Specification * PCI System Design Guide */ #ifndef LINUX_PCI_H #define LINUX_PCI_H #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * The PCI interface treats multi-function devices as independent * devices. The slot/function address of each device is encoded * in a single byte as follows: * * 7:3 = slot * 2:0 = function * * PCI_DEVFN(), PCI_SLOT(), and PCI_FUNC() are defined in uapi/linux/pci.h. * In the interest of not exposing interfaces to user-space unnecessarily, * the following kernel-only defines are being added here. */ #define PCI_DEVID(bus, devfn) ((((u16)bus) << 8) | devfn) /* return bus from PCI devid = ((u16)bus_number) << 8) | devfn */ #define PCI_BUS_NUM(x) (((x) >> 8) & 0xff) /* pci_slot represents a physical slot */ struct pci_slot { struct pci_bus *bus; /* The bus this slot is on */ struct list_head list; /* node in list of slots on this bus */ struct hotplug_slot *hotplug; /* Hotplug info (migrate over time) */ unsigned char number; /* PCI_SLOT(pci_dev->devfn) */ struct kobject kobj; }; static inline const char *pci_slot_name(const struct pci_slot *slot) { return kobject_name(&slot->kobj); } /* File state for mmap()s on /proc/bus/pci/X/Y */ enum pci_mmap_state { pci_mmap_io, pci_mmap_mem }; /* This defines the direction arg to the DMA mapping routines. */ #define PCI_DMA_BIDIRECTIONAL 0 #define PCI_DMA_TODEVICE 1 #define PCI_DMA_FROMDEVICE 2 #define PCI_DMA_NONE 3 /* * For PCI devices, the region numbers are assigned this way: */ enum { /* #0-5: standard PCI resources */ PCI_STD_RESOURCES, PCI_STD_RESOURCE_END = 5, /* #6: expansion ROM resource */ PCI_ROM_RESOURCE, /* device specific resources */ #ifdef CONFIG_PCI_IOV PCI_IOV_RESOURCES, PCI_IOV_RESOURCE_END = PCI_IOV_RESOURCES + PCI_SRIOV_NUM_BARS - 1, #endif /* resources assigned to buses behind the bridge */ #define PCI_BRIDGE_RESOURCE_NUM 4 PCI_BRIDGE_RESOURCES, PCI_BRIDGE_RESOURCE_END = PCI_BRIDGE_RESOURCES + PCI_BRIDGE_RESOURCE_NUM - 1, /* total resources associated with a PCI device */ PCI_NUM_RESOURCES, /* preserve this for compatibility */ DEVICE_COUNT_RESOURCE = PCI_NUM_RESOURCES, }; typedef int __bitwise pci_power_t; #define PCI_D0 ((pci_power_t __force) 0) #define PCI_D1 ((pci_power_t __force) 1) #define PCI_D2 ((pci_power_t __force) 2) #define PCI_D3hot ((pci_power_t __force) 3) #define PCI_D3cold ((pci_power_t __force) 4) #define PCI_UNKNOWN ((pci_power_t __force) 5) #define PCI_POWER_ERROR ((pci_power_t __force) -1) /* Remember to update this when the list above changes! */ extern const char *pci_power_names[]; static inline const char *pci_power_name(pci_power_t state) { return pci_power_names[1 + (int) state]; } #define PCI_PM_D2_DELAY 200 #define PCI_PM_D3_WAIT 10 #define PCI_PM_D3COLD_WAIT 100 #define PCI_PM_BUS_WAIT 50 /** The pci_channel state describes connectivity between the CPU and * the pci device. If some PCI bus between here and the pci device * has crashed or locked up, this info is reflected here. */ typedef unsigned int __bitwise pci_channel_state_t; enum pci_channel_state { /* I/O channel is in normal state */ pci_channel_io_normal = (__force pci_channel_state_t) 1, /* I/O to channel is blocked */ pci_channel_io_frozen = (__force pci_channel_state_t) 2, /* PCI card is dead */ pci_channel_io_perm_failure = (__force pci_channel_state_t) 3, }; typedef unsigned int __bitwise pcie_reset_state_t; enum pcie_reset_state { /* Reset is NOT asserted (Use to deassert reset) */ pcie_deassert_reset = (__force pcie_reset_state_t) 1, /* Use #PERST to reset PCIe device */ pcie_warm_reset = (__force pcie_reset_state_t) 2, /* Use PCIe Hot Reset to reset device */ pcie_hot_reset = (__force pcie_reset_state_t) 3 }; typedef unsigned short __bitwise pci_dev_flags_t; enum pci_dev_flags { /* INTX_DISABLE in PCI_COMMAND register disables MSI * generation too. */ PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG = (__force pci_dev_flags_t) 1, /* Device configuration is irrevocably lost if disabled into D3 */ PCI_DEV_FLAGS_NO_D3 = (__force pci_dev_flags_t) 2, /* Provide indication device is assigned by a Virtual Machine Manager */ PCI_DEV_FLAGS_ASSIGNED = (__force pci_dev_flags_t) 4, }; enum pci_irq_reroute_variant { INTEL_IRQ_REROUTE_VARIANT = 1, MAX_IRQ_REROUTE_VARIANTS = 3 }; typedef unsigned short __bitwise pci_bus_flags_t; enum pci_bus_flags { PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1, PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2, }; /* These values come from the PCI Express Spec */ enum pcie_link_width { PCIE_LNK_WIDTH_RESRV = 0x00, PCIE_LNK_X1 = 0x01, PCIE_LNK_X2 = 0x02, PCIE_LNK_X4 = 0x04, PCIE_LNK_X8 = 0x08, PCIE_LNK_X12 = 0x0C, PCIE_LNK_X16 = 0x10, PCIE_LNK_X32 = 0x20, PCIE_LNK_WIDTH_UNKNOWN = 0xFF, }; /* Based on the PCI Hotplug Spec, but some values are made up by us */ enum pci_bus_speed { PCI_SPEED_33MHz = 0x00, PCI_SPEED_66MHz = 0x01, PCI_SPEED_66MHz_PCIX = 0x02, PCI_SPEED_100MHz_PCIX = 0x03, PCI_SPEED_133MHz_PCIX = 0x04, PCI_SPEED_66MHz_PCIX_ECC = 0x05, PCI_SPEED_100MHz_PCIX_ECC = 0x06, PCI_SPEED_133MHz_PCIX_ECC = 0x07, PCI_SPEED_66MHz_PCIX_266 = 0x09, PCI_SPEED_100MHz_PCIX_266 = 0x0a, PCI_SPEED_133MHz_PCIX_266 = 0x0b, AGP_UNKNOWN = 0x0c, AGP_1X = 0x0d, AGP_2X = 0x0e, AGP_4X = 0x0f, AGP_8X = 0x10, PCI_SPEED_66MHz_PCIX_533 = 0x11, PCI_SPEED_100MHz_PCIX_533 = 0x12, PCI_SPEED_133MHz_PCIX_533 = 0x13, PCIE_SPEED_2_5GT = 0x14, PCIE_SPEED_5_0GT = 0x15, PCIE_SPEED_8_0GT = 0x16, PCI_SPEED_UNKNOWN = 0xff, }; struct pci_cap_saved_data { char cap_nr; unsigned int size; u32 data[0]; }; struct pci_cap_saved_state { struct hlist_node next; struct pci_cap_saved_data cap; }; struct pcie_link_state; struct pci_vpd; struct pci_sriov; struct pci_ats; /* * The pci_dev structure is used to describe PCI devices. */ struct pci_dev { struct list_head bus_list; /* node in per-bus list */ struct pci_bus *bus; /* bus this device is on */ struct pci_bus *subordinate; /* bus this device bridges to */ void *sysdata; /* hook for sys-specific extension */ struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */ struct pci_slot *slot; /* Physical slot this device is in */ unsigned int devfn; /* encoded device & function index */ unsigned short vendor; unsigned short device; unsigned short subsystem_vendor; unsigned short subsystem_device; unsigned int class; /* 3 bytes: (base,sub,prog-if) */ u8 revision; /* PCI revision, low byte of class word */ u8 hdr_type; /* PCI header type (`multi' flag masked out) */ u8 pcie_cap; /* PCIe capability offset */ u8 msi_cap; /* MSI capability offset */ u8 msix_cap; /* MSI-X capability offset */ u8 pcie_mpss:3; /* PCIe Max Payload Size Supported */ u8 rom_base_reg; /* which config register controls the ROM */ u8 pin; /* which interrupt pin this device uses */ u16 pcie_flags_reg; /* cached PCIe Capabilities Register */ struct pci_driver *driver; /* which driver has allocated this device */ u64 dma_mask; /* Mask of the bits of bus address this device implements. Normally this is 0xffffffff. You only need to change this if your device has broken DMA or supports 64-bit transfers. */ struct device_dma_parameters dma_parms; pci_power_t current_state; /* Current operating state. In ACPI-speak, this is D0-D3, D0 being fully functional, and D3 being off. */ u8 pm_cap; /* PM capability offset */ unsigned int pme_support:5; /* Bitmask of states from which PME# can be generated */ unsigned int pme_interrupt:1; unsigned int pme_poll:1; /* Poll device's PME status bit */ unsigned int d1_support:1; /* Low power state D1 is supported */ unsigned int d2_support:1; /* Low power state D2 is supported */ unsigned int no_d1d2:1; /* D1 and D2 are forbidden */ unsigned int no_d3cold:1; /* D3cold is forbidden */ unsigned int d3cold_allowed:1; /* D3cold is allowed by user */ unsigned int mmio_always_on:1; /* disallow turning off io/mem decoding during bar sizing */ unsigned int wakeup_prepared:1; unsigned int runtime_d3cold:1; /* whether go through runtime D3cold, not set for devices powered on/off by the corresponding bridge */ unsigned int d3_delay; /* D3->D0 transition time in ms */ unsigned int d3cold_delay; /* D3cold->D0 transition time in ms */ #ifdef CONFIG_PCIEASPM struct pcie_link_state *link_state; /* ASPM link state */ #endif pci_channel_state_t error_state; /* current connectivity state */ struct device dev; /* Generic device interface */ int cfg_size; /* Size of configuration space */ /* * Instead of touching interrupt line and base address registers * directly, use the values stored here. They might be different! */ unsigned int irq; struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */ bool match_driver; /* Skip attaching driver */ /* These fields are used by common fixups */ unsigned int transparent:1; /* Subtractive decode PCI bridge */ unsigned int multifunction:1;/* Part of multi-function device */ /* keep track of device state */ unsigned int is_added:1; unsigned int is_busmaster:1; /* device is busmaster */ unsigned int no_msi:1; /* device may not use msi */ unsigned int block_cfg_access:1; /* config space access is blocked */ unsigned int broken_parity_status:1; /* Device generates false positive parity */ unsigned int irq_reroute_variant:2; /* device needs IRQ rerouting variant */ unsigned int msi_enabled:1; unsigned int msix_enabled:1; unsigned int ari_enabled:1; /* ARI forwarding */ unsigned int is_managed:1; unsigned int needs_freset:1; /* Dev requires fundamental reset */ unsigned int state_saved:1; unsigned int is_physfn:1; unsigned int is_virtfn:1; unsigned int reset_fn:1; unsigned int is_hotplug_bridge:1; unsigned int __aer_firmware_first_valid:1; unsigned int __aer_firmware_first:1; unsigned int broken_intx_masking:1; unsigned int io_window_1k:1; /* Intel P2P bridge 1K I/O windows */ pci_dev_flags_t dev_flags; atomic_t enable_cnt; /* pci_enable_device has been called */ u32 saved_config_space[16]; /* config space saved at suspend time */ struct hlist_head saved_cap_space; struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */ int rom_attr_enabled; /* has display of the rom attribute been enabled? */ struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */ struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */ #ifdef CONFIG_PCI_MSI struct list_head msi_list; struct kset *msi_kset; #endif struct pci_vpd *vpd; #ifdef CONFIG_PCI_ATS union { struct pci_sriov *sriov; /* SR-IOV capability related */ struct pci_dev *physfn; /* the PF this VF is associated with */ }; struct pci_ats *ats; /* Address Translation Service */ #endif phys_addr_t rom; /* Physical address of ROM if it's not from the BAR */ size_t romlen; /* Length of ROM if it's not from the BAR */ }; static inline struct pci_dev *pci_physfn(struct pci_dev *dev) { #ifdef CONFIG_PCI_IOV if (dev->is_virtfn) dev = dev->physfn; #endif return dev; } struct pci_dev *pci_alloc_dev(struct pci_bus *bus); #define to_pci_dev(n) container_of(n, struct pci_dev, dev) #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL) static inline int pci_channel_offline(struct pci_dev *pdev) { return (pdev->error_state != pci_channel_io_normal); } extern struct resource busn_resource; struct pci_host_bridge_window { struct list_head list; struct resource *res; /* host bridge aperture (CPU address) */ resource_size_t offset; /* bus address + offset = CPU address */ }; struct pci_host_bridge { struct device dev; struct pci_bus *bus; /* root bus */ struct list_head windows; /* pci_host_bridge_windows */ void (*release_fn)(struct pci_host_bridge *); void *release_data; }; #define to_pci_host_bridge(n) container_of(n, struct pci_host_bridge, dev) void pci_set_host_bridge_release(struct pci_host_bridge *bridge, void (*release_fn)(struct pci_host_bridge *), void *release_data); int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge); /* * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond * to P2P or CardBus bridge windows) go in a table. Additional ones (for * buses below host bridges or subtractive decode bridges) go in the list. * Use pci_bus_for_each_resource() to iterate through all the resources. */ /* * PCI_SUBTRACTIVE_DECODE means the bridge forwards the window implicitly * and there's no way to program the bridge with the details of the window. * This does not apply to ACPI _CRS windows, even with the _DEC subtractive- * decode bit set, because they are explicit and can be programmed with _SRS. */ #define PCI_SUBTRACTIVE_DECODE 0x1 struct pci_bus_resource { struct list_head list; struct resource *res; unsigned int flags; }; #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */ struct pci_bus { struct list_head node; /* node in list of buses */ struct pci_bus *parent; /* parent bus this bridge is on */ struct list_head children; /* list of child buses */ struct list_head devices; /* list of devices on this bus */ struct pci_dev *self; /* bridge device as seen by parent */ struct list_head slots; /* list of slots on this bus */ struct resource *resource[PCI_BRIDGE_RESOURCE_NUM]; struct list_head resources; /* address space routed to this bus */ struct resource busn_res; /* bus numbers routed to this bus */ struct pci_ops *ops; /* configuration access functions */ struct msi_chip *msi; /* MSI controller */ void *sysdata; /* hook for sys-specific extension */ struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */ unsigned char number; /* bus number */ unsigned char primary; /* number of primary bridge */ unsigned char max_bus_speed; /* enum pci_bus_speed */ unsigned char cur_bus_speed; /* enum pci_bus_speed */ char name[48]; unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */ pci_bus_flags_t bus_flags; /* inherited by child buses */ struct device *bridge; struct device dev; struct bin_attribute *legacy_io; /* legacy I/O for this bus */ struct bin_attribute *legacy_mem; /* legacy mem */ unsigned int is_added:1; }; #define pci_bus_b(n) list_entry(n, struct pci_bus, node) #define to_pci_bus(n) container_of(n, struct pci_bus, dev) /* * Returns true if the PCI bus is root (behind host-PCI bridge), * false otherwise * * Some code assumes that "bus->self == NULL" means that bus is a root bus. * This is incorrect because "virtual" buses added for SR-IOV (via * virtfn_add_bus()) have "bus->self == NULL" but are not root buses. */ static inline bool pci_is_root_bus(struct pci_bus *pbus) { return !(pbus->parent); } static inline struct pci_dev *pci_upstream_bridge(struct pci_dev *dev) { dev = pci_physfn(dev); if (pci_is_root_bus(dev->bus)) return NULL; return dev->bus->self; } #ifdef CONFIG_PCI_MSI static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return pci_dev->msi_enabled || pci_dev->msix_enabled; } #else static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false; } #endif /* * Error values that may be returned by PCI functions. */ #define PCIBIOS_SUCCESSFUL 0x00 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81 #define PCIBIOS_BAD_VENDOR_ID 0x83 #define PCIBIOS_DEVICE_NOT_FOUND 0x86 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87 #define PCIBIOS_SET_FAILED 0x88 #define PCIBIOS_BUFFER_TOO_SMALL 0x89 /* * Translate above to generic errno for passing back through non-PCI code. */ static inline int pcibios_err_to_errno(int err) { if (err <= PCIBIOS_SUCCESSFUL) return err; /* Assume already errno */ switch (err) { case PCIBIOS_FUNC_NOT_SUPPORTED: return -ENOENT; case PCIBIOS_BAD_VENDOR_ID: return -EINVAL; case PCIBIOS_DEVICE_NOT_FOUND: return -ENODEV; case PCIBIOS_BAD_REGISTER_NUMBER: return -EFAULT; case PCIBIOS_SET_FAILED: return -EIO; case PCIBIOS_BUFFER_TOO_SMALL: return -ENOSPC; } return -ENOTTY; } /* Low-level architecture-dependent routines */ struct pci_ops { int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val); int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val); }; /* * ACPI needs to be able to access PCI config space before we've done a * PCI bus scan and created pci_bus structures. */ int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn, int reg, int len, u32 *val); int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn, int reg, int len, u32 val); struct pci_bus_region { resource_size_t start; resource_size_t end; }; struct pci_dynids { spinlock_t lock; /* protects list, index */ struct list_head list; /* for IDs added at runtime */ }; /* * PCI Error Recovery System (PCI-ERS). If a PCI device driver provides * a set of callbacks in struct pci_error_handlers, that device driver * will be notified of PCI bus errors, and will be driven to recovery * when an error occurs. */ typedef unsigned int __bitwise pci_ers_result_t; enum pci_ers_result { /* no result/none/not supported in device driver */ PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1, /* Device driver can recover without slot reset */ PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2, /* Device driver wants slot to be reset. */ PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3, /* Device has completely failed, is unrecoverable */ PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4, /* Device driver is fully recovered and operational */ PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5, /* No AER capabilities registered for the driver */ PCI_ERS_RESULT_NO_AER_DRIVER = (__force pci_ers_result_t) 6, }; /* PCI bus error event callbacks */ struct pci_error_handlers { /* PCI bus error detected on this device */ pci_ers_result_t (*error_detected)(struct pci_dev *dev, enum pci_channel_state error); /* MMIO has been re-enabled, but not DMA */ pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev); /* PCI Express link has been reset */ pci_ers_result_t (*link_reset)(struct pci_dev *dev); /* PCI slot has been reset */ pci_ers_result_t (*slot_reset)(struct pci_dev *dev); /* Device driver may resume normal operations */ void (*resume)(struct pci_dev *dev); }; struct module; struct pci_driver { struct list_head node; const char *name; const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */ int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */ void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */ int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */ int (*suspend_late) (struct pci_dev *dev, pm_message_t state); int (*resume_early) (struct pci_dev *dev); int (*resume) (struct pci_dev *dev); /* Device woken up */ void (*shutdown) (struct pci_dev *dev); int (*sriov_configure) (struct pci_dev *dev, int num_vfs); /* PF pdev */ const struct pci_error_handlers *err_handler; struct device_driver driver; struct pci_dynids dynids; }; #define to_pci_driver(drv) container_of(drv, struct pci_driver, driver) /** * DEFINE_PCI_DEVICE_TABLE - macro used to describe a pci device table * @_table: device table name * * This macro is used to create a struct pci_device_id array (a device table) * in a generic manner. */ #define DEFINE_PCI_DEVICE_TABLE(_table) \ const struct pci_device_id _table[] /** * PCI_DEVICE - macro used to describe a specific pci device * @vend: the 16 bit PCI Vendor ID * @dev: the 16 bit PCI Device ID * * This macro is used to create a struct pci_device_id that matches a * specific device. The subvendor and subdevice fields will be set to * PCI_ANY_ID. */ #define PCI_DEVICE(vend,dev) \ .vendor = (vend), .device = (dev), \ .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID /** * PCI_DEVICE_SUB - macro used to describe a specific pci device with subsystem * @vend: the 16 bit PCI Vendor ID * @dev: the 16 bit PCI Device ID * @subvend: the 16 bit PCI Subvendor ID * @subdev: the 16 bit PCI Subdevice ID * * This macro is used to create a struct pci_device_id that matches a * specific device with subsystem information. */ #define PCI_DEVICE_SUB(vend, dev, subvend, subdev) \ .vendor = (vend), .device = (dev), \ .subvendor = (subvend), .subdevice = (subdev) /** * PCI_DEVICE_CLASS - macro used to describe a specific pci device class * @dev_class: the class, subclass, prog-if triple for this device * @dev_class_mask: the class mask for this device * * This macro is used to create a struct pci_device_id that matches a * specific PCI class. The vendor, device, subvendor, and subdevice * fields will be set to PCI_ANY_ID. */ #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \ .class = (dev_class), .class_mask = (dev_class_mask), \ .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \ .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID /** * PCI_VDEVICE - macro used to describe a specific pci device in short form * @vendor: the vendor name * @device: the 16 bit PCI Device ID * * This macro is used to create a struct pci_device_id that matches a * specific PCI device. The subvendor, and subdevice fields will be set * to PCI_ANY_ID. The macro allows the next field to follow as the device * private data. */ #define PCI_VDEVICE(vendor, device) \ PCI_VENDOR_ID_##vendor, (device), \ PCI_ANY_ID, PCI_ANY_ID, 0, 0 /* these external functions are only available when PCI support is enabled */ #ifdef CONFIG_PCI void pcie_bus_configure_settings(struct pci_bus *bus); enum pcie_bus_config_types { PCIE_BUS_TUNE_OFF, PCIE_BUS_SAFE, PCIE_BUS_PERFORMANCE, PCIE_BUS_PEER2PEER, }; extern enum pcie_bus_config_types pcie_bus_config; extern struct bus_type pci_bus_type; /* Do NOT directly access these two variables, unless you are arch-specific PCI * code, or PCI core code. */ extern struct list_head pci_root_buses; /* list of all known PCI buses */ /* Some device drivers need know if PCI is initiated */ int no_pci_devices(void); void pcibios_resource_survey_bus(struct pci_bus *bus); void pcibios_add_bus(struct pci_bus *bus); void pcibios_remove_bus(struct pci_bus *bus); void pcibios_fixup_bus(struct pci_bus *); int __must_check pcibios_enable_device(struct pci_dev *, int mask); /* Architecture-specific versions may override this (weak) */ char *pcibios_setup(char *str); /* Used only when drivers/pci/setup.c is used */ resource_size_t pcibios_align_resource(void *, const struct resource *, resource_size_t, resource_size_t); void pcibios_update_irq(struct pci_dev *, int irq); /* Weak but can be overriden by arch */ void pci_fixup_cardbus(struct pci_bus *); /* Generic PCI functions used internally */ void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region, struct resource *res); void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res, struct pci_bus_region *region); void pcibios_scan_specific_bus(int busn); struct pci_bus *pci_find_bus(int domain, int busnr); void pci_bus_add_devices(const struct pci_bus *bus); struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus, struct pci_ops *ops, void *sysdata); struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata); struct pci_bus *pci_create_root_bus(struct device *parent, int bus, struct pci_ops *ops, void *sysdata, struct list_head *resources); int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax); int pci_bus_update_busn_res_end(struct pci_bus *b, int busmax); void pci_bus_release_busn_res(struct pci_bus *b); struct pci_bus *pci_scan_root_bus(struct device *parent, int bus, struct pci_ops *ops, void *sysdata, struct list_head *resources); struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev, int busnr); void pcie_update_link_speed(struct pci_bus *bus, u16 link_status); struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr, const char *name, struct hotplug_slot *hotplug); void pci_destroy_slot(struct pci_slot *slot); int pci_scan_slot(struct pci_bus *bus, int devfn); struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn); void pci_device_add(struct pci_dev *dev, struct pci_bus *bus); unsigned int pci_scan_child_bus(struct pci_bus *bus); int __must_check pci_bus_add_device(struct pci_dev *dev); void pci_read_bridge_bases(struct pci_bus *child); struct resource *pci_find_parent_resource(const struct pci_dev *dev, struct resource *res); u8 pci_swizzle_interrupt_pin(const struct pci_dev *dev, u8 pin); int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge); u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp); struct pci_dev *pci_dev_get(struct pci_dev *dev); void pci_dev_put(struct pci_dev *dev); void pci_remove_bus(struct pci_bus *b); void pci_stop_and_remove_bus_device(struct pci_dev *dev); void pci_stop_root_bus(struct pci_bus *bus); void pci_remove_root_bus(struct pci_bus *bus); void pci_setup_cardbus(struct pci_bus *bus); void pci_sort_breadthfirst(void); #define dev_is_pci(d) ((d)->bus == &pci_bus_type) #define dev_is_pf(d) ((dev_is_pci(d) ? to_pci_dev(d)->is_physfn : false)) #define dev_num_vf(d) ((dev_is_pci(d) ? pci_num_vf(to_pci_dev(d)) : 0)) /* Generic PCI functions exported to card drivers */ enum pci_lost_interrupt_reason { PCI_LOST_IRQ_NO_INFORMATION = 0, PCI_LOST_IRQ_DISABLE_MSI, PCI_LOST_IRQ_DISABLE_MSIX, PCI_LOST_IRQ_DISABLE_ACPI, }; enum pci_lost_interrupt_reason pci_lost_interrupt(struct pci_dev *dev); int pci_find_capability(struct pci_dev *dev, int cap); int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap); int pci_find_ext_capability(struct pci_dev *dev, int cap); int pci_find_next_ext_capability(struct pci_dev *dev, int pos, int cap); int pci_find_ht_capability(struct pci_dev *dev, int ht_cap); int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap); struct pci_bus *pci_find_next_bus(const struct pci_bus *from); struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device, struct pci_dev *from); struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device, unsigned int ss_vendor, unsigned int ss_device, struct pci_dev *from); struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn); struct pci_dev *pci_get_domain_bus_and_slot(int domain, unsigned int bus, unsigned int devfn); static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus, unsigned int devfn) { return pci_get_domain_bus_and_slot(0, bus, devfn); } struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from); int pci_dev_present(const struct pci_device_id *ids); int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn, int where, u8 *val); int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn, int where, u16 *val); int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn, int where, u32 *val); int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn, int where, u8 val); int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn, int where, u16 val); int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn, int where, u32 val); struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops); static inline int pci_read_config_byte(const struct pci_dev *dev, int where, u8 *val) { return pci_bus_read_config_byte(dev->bus, dev->devfn, where, val); } static inline int pci_read_config_word(const struct pci_dev *dev, int where, u16 *val) { return pci_bus_read_config_word(dev->bus, dev->devfn, where, val); } static inline int pci_read_config_dword(const struct pci_dev *dev, int where, u32 *val) { return pci_bus_read_config_dword(dev->bus, dev->devfn, where, val); } static inline int pci_write_config_byte(const struct pci_dev *dev, int where, u8 val) { return pci_bus_write_config_byte(dev->bus, dev->devfn, where, val); } static inline int pci_write_config_word(const struct pci_dev *dev, int where, u16 val) { return pci_bus_write_config_word(dev->bus, dev->devfn, where, val); } static inline int pci_write_config_dword(const struct pci_dev *dev, int where, u32 val) { return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val); } int pcie_capability_read_word(struct pci_dev *dev, int pos, u16 *val); int pcie_capability_read_dword(struct pci_dev *dev, int pos, u32 *val); int pcie_capability_write_word(struct pci_dev *dev, int pos, u16 val); int pcie_capability_write_dword(struct pci_dev *dev, int pos, u32 val); int pcie_capability_clear_and_set_word(struct pci_dev *dev, int pos, u16 clear, u16 set); int pcie_capability_clear_and_set_dword(struct pci_dev *dev, int pos, u32 clear, u32 set); static inline int pcie_capability_set_word(struct pci_dev *dev, int pos, u16 set) { return pcie_capability_clear_and_set_word(dev, pos, 0, set); } static inline int pcie_capability_set_dword(struct pci_dev *dev, int pos, u32 set) { return pcie_capability_clear_and_set_dword(dev, pos, 0, set); } static inline int pcie_capability_clear_word(struct pci_dev *dev, int pos, u16 clear) { return pcie_capability_clear_and_set_word(dev, pos, clear, 0); } static inline int pcie_capability_clear_dword(struct pci_dev *dev, int pos, u32 clear) { return pcie_capability_clear_and_set_dword(dev, pos, clear, 0); } /* user-space driven config access */ int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val); int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val); int pci_user_read_config_dword(struct pci_dev *dev, int where, u32 *val); int pci_user_write_config_byte(struct pci_dev *dev, int where, u8 val); int pci_user_write_config_word(struct pci_dev *dev, int where, u16 val); int pci_user_write_config_dword(struct pci_dev *dev, int where, u32 val); int __must_check pci_enable_device(struct pci_dev *dev); int __must_check pci_enable_device_io(struct pci_dev *dev); int __must_check pci_enable_device_mem(struct pci_dev *dev); int __must_check pci_reenable_device(struct pci_dev *); int __must_check pcim_enable_device(struct pci_dev *pdev); void pcim_pin_device(struct pci_dev *pdev); static inline int pci_is_enabled(struct pci_dev *pdev) { return (atomic_read(&pdev->enable_cnt) > 0); } static inline int pci_is_managed(struct pci_dev *pdev) { return pdev->is_managed; } void pci_disable_device(struct pci_dev *dev); extern unsigned int pcibios_max_latency; void pci_set_master(struct pci_dev *dev); void pci_clear_master(struct pci_dev *dev); int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state); int pci_set_cacheline_size(struct pci_dev *dev); #define HAVE_PCI_SET_MWI int __must_check pci_set_mwi(struct pci_dev *dev); int pci_try_set_mwi(struct pci_dev *dev); void pci_clear_mwi(struct pci_dev *dev); void pci_intx(struct pci_dev *dev, int enable); bool pci_intx_mask_supported(struct pci_dev *dev); bool pci_check_and_mask_intx(struct pci_dev *dev); bool pci_check_and_unmask_intx(struct pci_dev *dev); void pci_msi_off(struct pci_dev *dev); int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size); int pci_set_dma_seg_boundary(struct pci_dev *dev, unsigned long mask); int pci_wait_for_pending_transaction(struct pci_dev *dev); int pcix_get_max_mmrbc(struct pci_dev *dev); int pcix_get_mmrbc(struct pci_dev *dev); int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc); int pcie_get_readrq(struct pci_dev *dev); int pcie_set_readrq(struct pci_dev *dev, int rq); int pcie_get_mps(struct pci_dev *dev); int pcie_set_mps(struct pci_dev *dev, int mps); int pcie_get_minimum_link(struct pci_dev *dev, enum pci_bus_speed *speed, enum pcie_link_width *width); int __pci_reset_function(struct pci_dev *dev); int __pci_reset_function_locked(struct pci_dev *dev); int pci_reset_function(struct pci_dev *dev); int pci_probe_reset_slot(struct pci_slot *slot); int pci_reset_slot(struct pci_slot *slot); int pci_probe_reset_bus(struct pci_bus *bus); int pci_reset_bus(struct pci_bus *bus); void pci_reset_bridge_secondary_bus(struct pci_dev *dev); void pci_update_resource(struct pci_dev *dev, int resno); int __must_check pci_assign_resource(struct pci_dev *dev, int i); int __must_check pci_reassign_resource(struct pci_dev *dev, int i, resource_size_t add_size, resource_size_t align); int pci_select_bars(struct pci_dev *dev, unsigned long flags); /* ROM control related routines */ int pci_enable_rom(struct pci_dev *pdev); void pci_disable_rom(struct pci_dev *pdev); void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size); void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom); size_t pci_get_rom_size(struct pci_dev *pdev, void __iomem *rom, size_t size); void __iomem __must_check *pci_platform_rom(struct pci_dev *pdev, size_t *size); /* Power management related routines */ int pci_save_state(struct pci_dev *dev); void pci_restore_state(struct pci_dev *dev); struct pci_saved_state *pci_store_saved_state(struct pci_dev *dev); int pci_load_saved_state(struct pci_dev *dev, struct pci_saved_state *state); int pci_load_and_free_saved_state(struct pci_dev *dev, struct pci_saved_state **state); int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state); int pci_set_power_state(struct pci_dev *dev, pci_power_t state); pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state); bool pci_pme_capable(struct pci_dev *dev, pci_power_t state); void pci_pme_active(struct pci_dev *dev, bool enable); int __pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool runtime, bool enable); int pci_wake_from_d3(struct pci_dev *dev, bool enable); pci_power_t pci_target_state(struct pci_dev *dev); int pci_prepare_to_sleep(struct pci_dev *dev); int pci_back_from_sleep(struct pci_dev *dev); bool pci_dev_run_wake(struct pci_dev *dev); bool pci_check_pme_status(struct pci_dev *dev); void pci_pme_wakeup_bus(struct pci_bus *bus); static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable) { return __pci_enable_wake(dev, state, false, enable); } /* For use by arch with custom probe code */ void set_pcie_port_type(struct pci_dev *pdev); void set_pcie_hotplug_bridge(struct pci_dev *pdev); /* Functions for PCI Hotplug drivers to use */ int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap); unsigned int pci_rescan_bus_bridge_resize(struct pci_dev *bridge); unsigned int pci_rescan_bus(struct pci_bus *bus); /* Vital product data routines */ ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf); ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf); /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */ resource_size_t pcibios_retrieve_fw_addr(struct pci_dev *dev, int idx); void pci_bus_assign_resources(const struct pci_bus *bus); void pci_bus_size_bridges(struct pci_bus *bus); int pci_claim_resource(struct pci_dev *, int); void pci_assign_unassigned_resources(void); void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge); void pci_assign_unassigned_bus_resources(struct pci_bus *bus); void pci_assign_unassigned_root_bus_resources(struct pci_bus *bus); void pdev_enable_device(struct pci_dev *); int pci_enable_resources(struct pci_dev *, int mask); void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *), int (*)(const struct pci_dev *, u8, u8)); #define HAVE_PCI_REQ_REGIONS 2 int __must_check pci_request_regions(struct pci_dev *, const char *); int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *); void pci_release_regions(struct pci_dev *); int __must_check pci_request_region(struct pci_dev *, int, const char *); int __must_check pci_request_region_exclusive(struct pci_dev *, int, const char *); void pci_release_region(struct pci_dev *, int); int pci_request_selected_regions(struct pci_dev *, int, const char *); int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *); void pci_release_selected_regions(struct pci_dev *, int); /* drivers/pci/bus.c */ struct pci_bus *pci_bus_get(struct pci_bus *bus); void pci_bus_put(struct pci_bus *bus); void pci_add_resource(struct list_head *resources, struct resource *res); void pci_add_resource_offset(struct list_head *resources, struct resource *res, resource_size_t offset); void pci_free_resource_list(struct list_head *resources); void pci_bus_add_resource(struct pci_bus *bus, struct resource *res, unsigned int flags); struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n); void pci_bus_remove_resources(struct pci_bus *bus); #define pci_bus_for_each_resource(bus, res, i) \ for (i = 0; \ (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \ i++) int __must_check pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res, resource_size_t size, resource_size_t align, resource_size_t min, unsigned int type_mask, resource_size_t (*alignf)(void *, const struct resource *, resource_size_t, resource_size_t), void *alignf_data); /* Proper probing supporting hot-pluggable devices */ int __must_check __pci_register_driver(struct pci_driver *, struct module *, const char *mod_name); /* * pci_register_driver must be a macro so that KBUILD_MODNAME can be expanded */ #define pci_register_driver(driver) \ __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME) void pci_unregister_driver(struct pci_driver *dev); /** * module_pci_driver() - Helper macro for registering a PCI driver * @__pci_driver: pci_driver struct * * Helper macro for PCI drivers which do not do anything special in module * init/exit. This eliminates a lot of boilerplate. Each module may only * use this macro once, and calling it replaces module_init() and module_exit() */ #define module_pci_driver(__pci_driver) \ module_driver(__pci_driver, pci_register_driver, \ pci_unregister_driver) struct pci_driver *pci_dev_driver(const struct pci_dev *dev); int pci_add_dynid(struct pci_driver *drv, unsigned int vendor, unsigned int device, unsigned int subvendor, unsigned int subdevice, unsigned int class, unsigned int class_mask, unsigned long driver_data); const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, struct pci_dev *dev); int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max, int pass); void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *), void *userdata); int pci_cfg_space_size_ext(struct pci_dev *dev); int pci_cfg_space_size(struct pci_dev *dev); unsigned char pci_bus_max_busnr(struct pci_bus *bus); void pci_setup_bridge(struct pci_bus *bus); resource_size_t pcibios_window_alignment(struct pci_bus *bus, unsigned long type); #define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0) #define PCI_VGA_STATE_CHANGE_DECODES (1 << 1) int pci_set_vga_state(struct pci_dev *pdev, bool decode, unsigned int command_bits, u32 flags); /* kmem_cache style wrapper around pci_alloc_consistent() */ #include #include #define pci_pool dma_pool #define pci_pool_create(name, pdev, size, align, allocation) \ dma_pool_create(name, &pdev->dev, size, align, allocation) #define pci_pool_destroy(pool) dma_pool_destroy(pool) #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle) #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr) enum pci_dma_burst_strategy { PCI_DMA_BURST_INFINITY, /* make bursts as large as possible, strategy_parameter is N/A */ PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter byte boundaries */ PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of strategy_parameter byte boundaries */ }; struct msix_entry { u32 vector; /* kernel uses to write allocated vector */ u16 entry; /* driver uses to specify entry, OS writes */ }; #ifndef CONFIG_PCI_MSI static inline int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec) { return -1; } static inline int pci_enable_msi_block_auto(struct pci_dev *dev, unsigned int *maxvec) { return -1; } static inline void pci_msi_shutdown(struct pci_dev *dev) { } static inline void pci_disable_msi(struct pci_dev *dev) { } static inline int pci_msix_table_size(struct pci_dev *dev) { return 0; } static inline int pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries, int nvec) { return -1; } static inline void pci_msix_shutdown(struct pci_dev *dev) { } static inline void pci_disable_msix(struct pci_dev *dev) { } static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev) { } static inline void pci_restore_msi_state(struct pci_dev *dev) { } static inline int pci_msi_enabled(void) { return 0; } #else int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec); int pci_enable_msi_block_auto(struct pci_dev *dev, unsigned int *maxvec); void pci_msi_shutdown(struct pci_dev *dev); void pci_disable_msi(struct pci_dev *dev); int pci_msix_table_size(struct pci_dev *dev); int pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries, int nvec); void pci_msix_shutdown(struct pci_dev *dev); void pci_disable_msix(struct pci_dev *dev); void msi_remove_pci_irq_vectors(struct pci_dev *dev); void pci_restore_msi_state(struct pci_dev *dev); int pci_msi_enabled(void); #endif #ifdef CONFIG_PCIEPORTBUS extern bool pcie_ports_disabled; extern bool pcie_ports_auto; #else #define pcie_ports_disabled true #define pcie_ports_auto false #endif #ifndef CONFIG_PCIEASPM static inline bool pcie_aspm_support_enabled(void) { return false; } #else bool pcie_aspm_support_enabled(void); #endif #ifdef CONFIG_PCIEAER void pci_no_aer(void); bool pci_aer_available(void); #else static inline void pci_no_aer(void) { } static inline bool pci_aer_available(void) { return false; } #endif #ifndef CONFIG_PCIE_ECRC static inline void pcie_set_ecrc_checking(struct pci_dev *dev) { return; } static inline void pcie_ecrc_get_policy(char *str) {}; #else void pcie_set_ecrc_checking(struct pci_dev *dev); void pcie_ecrc_get_policy(char *str); #endif #define pci_enable_msi(pdev) pci_enable_msi_block(pdev, 1) #ifdef CONFIG_HT_IRQ /* The functions a driver should call */ int ht_create_irq(struct pci_dev *dev, int idx); void ht_destroy_irq(unsigned int irq); #endif /* CONFIG_HT_IRQ */ void pci_cfg_access_lock(struct pci_dev *dev); bool pci_cfg_access_trylock(struct pci_dev *dev); void pci_cfg_access_unlock(struct pci_dev *dev); /* * PCI domain support. Sometimes called PCI segment (eg by ACPI), * a PCI domain is defined to be a set of PCI buses which share * configuration space. */ #ifdef CONFIG_PCI_DOMAINS extern int pci_domains_supported; #else enum { pci_domains_supported = 0 }; static inline int pci_domain_nr(struct pci_bus *bus) { return 0; } static inline int pci_proc_domain(struct pci_bus *bus) { return 0; } #endif /* CONFIG_PCI_DOMAINS */ /* some architectures require additional setup to direct VGA traffic */ typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode, unsigned int command_bits, u32 flags); void pci_register_set_vga_state(arch_set_vga_state_t func); #else /* CONFIG_PCI is not enabled */ /* * If the system does not have PCI, clearly these return errors. Define * these as simple inline functions to avoid hair in drivers. */ #define _PCI_NOP(o, s, t) \ static inline int pci_##o##_config_##s(struct pci_dev *dev, \ int where, t val) \ { return PCIBIOS_FUNC_NOT_SUPPORTED; } #define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \ _PCI_NOP(o, word, u16 x) \ _PCI_NOP(o, dword, u32 x) _PCI_NOP_ALL(read, *) _PCI_NOP_ALL(write,) static inline struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device, struct pci_dev *from) { return NULL; } static inline struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device, unsigned int ss_vendor, unsigned int ss_device, struct pci_dev *from) { return NULL; } static inline struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from) { return NULL; } #define pci_dev_present(ids) (0) #define no_pci_devices() (1) #define pci_dev_put(dev) do { } while (0) static inline void pci_set_master(struct pci_dev *dev) { } static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; } static inline void pci_disable_device(struct pci_dev *dev) { } static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask) { return -EIO; } static inline int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask) { return -EIO; } static inline int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size) { return -EIO; } static inline int pci_set_dma_seg_boundary(struct pci_dev *dev, unsigned long mask) { return -EIO; } static inline int pci_assign_resource(struct pci_dev *dev, int i) { return -EBUSY; } static inline int __pci_register_driver(struct pci_driver *drv, struct module *owner) { return 0; } static inline int pci_register_driver(struct pci_driver *drv) { return 0; } static inline void pci_unregister_driver(struct pci_driver *drv) { } static inline int pci_find_capability(struct pci_dev *dev, int cap) { return 0; } static inline int pci_find_next_capability(struct pci_dev *dev, u8 post, int cap) { return 0; } static inline int pci_find_ext_capability(struct pci_dev *dev, int cap) { return 0; } /* Power management related routines */ static inline int pci_save_state(struct pci_dev *dev) { return 0; } static inline void pci_restore_state(struct pci_dev *dev) { } static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state) { return 0; } static inline int pci_wake_from_d3(struct pci_dev *dev, bool enable) { return 0; } static inline pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state) { return PCI_D0; } static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable) { return 0; } static inline int pci_request_regions(struct pci_dev *dev, const char *res_name) { return -EIO; } static inline void pci_release_regions(struct pci_dev *dev) { } #define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0) static inline void pci_block_cfg_access(struct pci_dev *dev) { } static inline int pci_block_cfg_access_in_atomic(struct pci_dev *dev) { return 0; } static inline void pci_unblock_cfg_access(struct pci_dev *dev) { } static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from) { return NULL; } static inline struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn) { return NULL; } static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus, unsigned int devfn) { return NULL; } static inline int pci_domain_nr(struct pci_bus *bus) { return 0; } static inline struct pci_dev *pci_dev_get(struct pci_dev *dev) { return NULL; } #define dev_is_pci(d) (false) #define dev_is_pf(d) (false) #define dev_num_vf(d) (0) #endif /* CONFIG_PCI */ /* Include architecture-dependent settings and functions */ #include #ifndef PCIBIOS_MAX_MEM_32 #define PCIBIOS_MAX_MEM_32 (-1) #endif /* these helpers provide future and backwards compatibility * for accessing popular PCI BAR info */ #define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start) #define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end) #define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags) #define pci_resource_len(dev,bar) \ ((pci_resource_start((dev), (bar)) == 0 && \ pci_resource_end((dev), (bar)) == \ pci_resource_start((dev), (bar))) ? 0 : \ \ (pci_resource_end((dev), (bar)) - \ pci_resource_start((dev), (bar)) + 1)) /* Similar to the helpers above, these manipulate per-pci_dev * driver-specific data. They are really just a wrapper around * the generic device structure functions of these calls. */ static inline void *pci_get_drvdata(struct pci_dev *pdev) { return dev_get_drvdata(&pdev->dev); } static inline void pci_set_drvdata(struct pci_dev *pdev, void *data) { dev_set_drvdata(&pdev->dev, data); } /* If you want to know what to call your pci_dev, ask this function. * Again, it's a wrapper around the generic device. */ static inline const char *pci_name(const struct pci_dev *pdev) { return dev_name(&pdev->dev); } /* Some archs don't want to expose struct resource to userland as-is * in sysfs and /proc */ #ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER static inline void pci_resource_to_user(const struct pci_dev *dev, int bar, const struct resource *rsrc, resource_size_t *start, resource_size_t *end) { *start = rsrc->start; *end = rsrc->end; } #endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */ /* * The world is not perfect and supplies us with broken PCI devices. * For at least a part of these bugs we need a work-around, so both * generic (drivers/pci/quirks.c) and per-architecture code can define * fixup hooks to be called for particular buggy devices. */ struct pci_fixup { u16 vendor; /* You can use PCI_ANY_ID here of course */ u16 device; /* You can use PCI_ANY_ID here of course */ u32 class; /* You can use PCI_ANY_ID here too */ unsigned int class_shift; /* should be 0, 8, 16 */ void (*hook)(struct pci_dev *dev); }; enum pci_fixup_pass { pci_fixup_early, /* Before probing BARs */ pci_fixup_header, /* After reading configuration header */ pci_fixup_final, /* Final phase of device fixups */ pci_fixup_enable, /* pci_enable_device() time */ pci_fixup_resume, /* pci_device_resume() */ pci_fixup_suspend, /* pci_device_suspend */ pci_fixup_resume_early, /* pci_device_resume_early() */ }; /* Anonymous variables would be nice... */ #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, class, \ class_shift, hook) \ static const struct pci_fixup __pci_fixup_##name __used \ __attribute__((__section__(#section), aligned((sizeof(void *))))) \ = { vendor, device, class, class_shift, hook }; #define DECLARE_PCI_FIXUP_CLASS_EARLY(vendor, device, class, \ class_shift, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \ vendor##device##hook, vendor, device, class, class_shift, hook) #define DECLARE_PCI_FIXUP_CLASS_HEADER(vendor, device, class, \ class_shift, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \ vendor##device##hook, vendor, device, class, class_shift, hook) #define DECLARE_PCI_FIXUP_CLASS_FINAL(vendor, device, class, \ class_shift, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \ vendor##device##hook, vendor, device, class, class_shift, hook) #define DECLARE_PCI_FIXUP_CLASS_ENABLE(vendor, device, class, \ class_shift, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \ vendor##device##hook, vendor, device, class, class_shift, hook) #define DECLARE_PCI_FIXUP_CLASS_RESUME(vendor, device, class, \ class_shift, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \ resume##vendor##device##hook, vendor, device, class, \ class_shift, hook) #define DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(vendor, device, class, \ class_shift, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \ resume_early##vendor##device##hook, vendor, device, \ class, class_shift, hook) #define DECLARE_PCI_FIXUP_CLASS_SUSPEND(vendor, device, class, \ class_shift, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \ suspend##vendor##device##hook, vendor, device, class, \ class_shift, hook) #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \ vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook) #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \ vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook) #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \ vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook) #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \ vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook) #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \ resume##vendor##device##hook, vendor, device, \ PCI_ANY_ID, 0, hook) #define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \ resume_early##vendor##device##hook, vendor, device, \ PCI_ANY_ID, 0, hook) #define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \ DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \ suspend##vendor##device##hook, vendor, device, \ PCI_ANY_ID, 0, hook) #ifdef CONFIG_PCI_QUIRKS void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev); struct pci_dev *pci_get_dma_source(struct pci_dev *dev); int pci_dev_specific_acs_enabled(struct pci_dev *dev, u16 acs_flags); #else static inline void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev) {} static inline struct pci_dev *pci_get_dma_source(struct pci_dev *dev) { return pci_dev_get(dev); } static inline int pci_dev_specific_acs_enabled(struct pci_dev *dev, u16 acs_flags) { return -ENOTTY; } #endif void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen); void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr); void __iomem * const *pcim_iomap_table(struct pci_dev *pdev); int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name); int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask, const char *name); void pcim_iounmap_regions(struct pci_dev *pdev, int mask); extern int pci_pci_problems; #define PCIPCI_FAIL 1 /* No PCI PCI DMA */ #define PCIPCI_TRITON 2 #define PCIPCI_NATOMA 4 #define PCIPCI_VIAETBF 8 #define PCIPCI_VSFX 16 #define PCIPCI_ALIMAGIK 32 /* Need low latency setting */ #define PCIAGP_FAIL 64 /* No PCI to AGP DMA */ extern unsigned long pci_cardbus_io_size; extern unsigned long pci_cardbus_mem_size; extern u8 pci_dfl_cache_line_size; extern u8 pci_cache_line_size; extern unsigned long pci_hotplug_io_size; extern unsigned long pci_hotplug_mem_size; /* Architecture-specific versions may override these (weak) */ int pcibios_add_platform_entries(struct pci_dev *dev); void pcibios_disable_device(struct pci_dev *dev); void pcibios_set_master(struct pci_dev *dev); int pcibios_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state); int pcibios_add_device(struct pci_dev *dev); void pcibios_release_device(struct pci_dev *dev); #ifdef CONFIG_HIBERNATE_CALLBACKS extern struct dev_pm_ops pcibios_pm_ops; #endif #ifdef CONFIG_PCI_MMCONFIG void __init pci_mmcfg_early_init(void); void __init pci_mmcfg_late_init(void); #else static inline void pci_mmcfg_early_init(void) { } static inline void pci_mmcfg_late_init(void) { } #endif int pci_ext_cfg_avail(void); void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar); #ifdef CONFIG_PCI_IOV int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn); void pci_disable_sriov(struct pci_dev *dev); irqreturn_t pci_sriov_migration(struct pci_dev *dev); int pci_num_vf(struct pci_dev *dev); int pci_vfs_assigned(struct pci_dev *dev); int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs); int pci_sriov_get_totalvfs(struct pci_dev *dev); #else static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn) { return -ENODEV; } static inline void pci_disable_sriov(struct pci_dev *dev) { } static inline irqreturn_t pci_sriov_migration(struct pci_dev *dev) { return IRQ_NONE; } static inline int pci_num_vf(struct pci_dev *dev) { return 0; } static inline int pci_vfs_assigned(struct pci_dev *dev) { return 0; } static inline int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs) { return 0; } static inline int pci_sriov_get_totalvfs(struct pci_dev *dev) { return 0; } #endif #if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE) void pci_hp_create_module_link(struct pci_slot *pci_slot); void pci_hp_remove_module_link(struct pci_slot *pci_slot); #endif /** * pci_pcie_cap - get the saved PCIe capability offset * @dev: PCI device * * PCIe capability offset is calculated at PCI device initialization * time and saved in the data structure. This function returns saved * PCIe capability offset. Using this instead of pci_find_capability() * reduces unnecessary search in the PCI configuration space. If you * need to calculate PCIe capability offset from raw device for some * reasons, please use pci_find_capability() instead. */ static inline int pci_pcie_cap(struct pci_dev *dev) { return dev->pcie_cap; } /** * pci_is_pcie - check if the PCI device is PCI Express capable * @dev: PCI device * * Returns: true if the PCI device is PCI Express capable, false otherwise. */ static inline bool pci_is_pcie(struct pci_dev *dev) { return pci_pcie_cap(dev); } /** * pcie_caps_reg - get the PCIe Capabilities Register * @dev: PCI device */ static inline u16 pcie_caps_reg(const struct pci_dev *dev) { return dev->pcie_flags_reg; } /** * pci_pcie_type - get the PCIe device/port type * @dev: PCI device */ static inline int pci_pcie_type(const struct pci_dev *dev) { return (pcie_caps_reg(dev) & PCI_EXP_FLAGS_TYPE) >> 4; } void pci_request_acs(void); bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags); bool pci_acs_path_enabled(struct pci_dev *start, struct pci_dev *end, u16 acs_flags); #define PCI_VPD_LRDT 0x80 /* Large Resource Data Type */ #define PCI_VPD_LRDT_ID(x) (x | PCI_VPD_LRDT) /* Large Resource Data Type Tag Item Names */ #define PCI_VPD_LTIN_ID_STRING 0x02 /* Identifier String */ #define PCI_VPD_LTIN_RO_DATA 0x10 /* Read-Only Data */ #define PCI_VPD_LTIN_RW_DATA 0x11 /* Read-Write Data */ #define PCI_VPD_LRDT_ID_STRING PCI_VPD_LRDT_ID(PCI_VPD_LTIN_ID_STRING) #define PCI_VPD_LRDT_RO_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RO_DATA) #define PCI_VPD_LRDT_RW_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RW_DATA) /* Small Resource Data Type Tag Item Names */ #define PCI_VPD_STIN_END 0x78 /* End */ #define PCI_VPD_SRDT_END PCI_VPD_STIN_END #define PCI_VPD_SRDT_TIN_MASK 0x78 #define PCI_VPD_SRDT_LEN_MASK 0x07 #define PCI_VPD_LRDT_TAG_SIZE 3 #define PCI_VPD_SRDT_TAG_SIZE 1 #define PCI_VPD_INFO_FLD_HDR_SIZE 3 #define PCI_VPD_RO_KEYWORD_PARTNO "PN" #define PCI_VPD_RO_KEYWORD_MFR_ID "MN" #define PCI_VPD_RO_KEYWORD_VENDOR0 "V0" #define PCI_VPD_RO_KEYWORD_CHKSUM "RV" /** * pci_vpd_lrdt_size - Extracts the Large Resource Data Type length * @lrdt: Pointer to the beginning of the Large Resource Data Type tag * * Returns the extracted Large Resource Data Type length. */ static inline u16 pci_vpd_lrdt_size(const u8 *lrdt) { return (u16)lrdt[1] + ((u16)lrdt[2] << 8); } /** * pci_vpd_srdt_size - Extracts the Small Resource Data Type length * @lrdt: Pointer to the beginning of the Small Resource Data Type tag * * Returns the extracted Small Resource Data Type length. */ static inline u8 pci_vpd_srdt_size(const u8 *srdt) { return (*srdt) & PCI_VPD_SRDT_LEN_MASK; } /** * pci_vpd_info_field_size - Extracts the information field length * @lrdt: Pointer to the beginning of an information field header * * Returns the extracted information field length. */ static inline u8 pci_vpd_info_field_size(const u8 *info_field) { return info_field[2]; } /** * pci_vpd_find_tag - Locates the Resource Data Type tag provided * @buf: Pointer to buffered vpd data * @off: The offset into the buffer at which to begin the search * @len: The length of the vpd buffer * @rdt: The Resource Data Type to search for * * Returns the index where the Resource Data Type was found or * -ENOENT otherwise. */ int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt); /** * pci_vpd_find_info_keyword - Locates an information field keyword in the VPD * @buf: Pointer to buffered vpd data * @off: The offset into the buffer at which to begin the search * @len: The length of the buffer area, relative to off, in which to search * @kw: The keyword to search for * * Returns the index where the information field keyword was found or * -ENOENT otherwise. */ int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off, unsigned int len, const char *kw); /* PCI <-> OF binding helpers */ #ifdef CONFIG_OF struct device_node; void 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); /* Arch may override this (weak) */ struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus); static inline struct device_node * pci_device_to_OF_node(const struct pci_dev *pdev) { return pdev ? pdev->dev.of_node : NULL; } static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus) { return bus ? bus->dev.of_node : NULL; } #else /* CONFIG_OF */ static inline void pci_set_of_node(struct pci_dev *dev) { } 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) { } #endif /* CONFIG_OF */ #ifdef CONFIG_EEH static inline struct eeh_dev *pci_dev_to_eeh_dev(struct pci_dev *pdev) { return pdev->dev.archdata.edev; } #endif /** * pci_find_upstream_pcie_bridge - find upstream PCIe-to-PCI bridge of a device * @pdev: the PCI device * * if the device is PCIE, return NULL * if the device isn't connected to a PCIe bridge (that is its parent is a * legacy PCI bridge and the bridge is directly connected to bus 0), return its * parent */ struct pci_dev *pci_find_upstream_pcie_bridge(struct pci_dev *pdev); #endif /* LINUX_PCI_H */