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Diffstat (limited to 'kernel/include/linux/pci.h')
| -rw-r--r-- | kernel/include/linux/pci.h | 1910 |
1 files changed, 1910 insertions, 0 deletions
diff --git a/kernel/include/linux/pci.h b/kernel/include/linux/pci.h new file mode 100644 index 000000000..3ef3a5206 --- /dev/null +++ b/kernel/include/linux/pci.h @@ -0,0 +1,1910 @@ +/* + * pci.h + * + * PCI defines and function prototypes + * Copyright 1994, Drew Eckhardt + * Copyright 1997--1999 Martin Mares <mj@ucw.cz> + * + * 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 <linux/mod_devicetable.h> + +#include <linux/types.h> +#include <linux/init.h> +#include <linux/ioport.h> +#include <linux/list.h> +#include <linux/compiler.h> +#include <linux/errno.h> +#include <linux/kobject.h> +#include <linux/atomic.h> +#include <linux/device.h> +#include <linux/io.h> +#include <linux/resource_ext.h> +#include <uapi/linux/pci.h> + +#include <linux/pci_ids.h> + +/* + * 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 << 0), + /* Device configuration is irrevocably lost if disabled into D3 */ + PCI_DEV_FLAGS_NO_D3 = (__force pci_dev_flags_t) (1 << 1), + /* Provide indication device is assigned by a Virtual Machine Manager */ + PCI_DEV_FLAGS_ASSIGNED = (__force pci_dev_flags_t) (1 << 2), + /* Flag for quirk use to store if quirk-specific ACS is enabled */ + PCI_DEV_FLAGS_ACS_ENABLED_QUIRK = (__force pci_dev_flags_t) (1 << 3), + /* Flag to indicate the device uses dma_alias_devfn */ + PCI_DEV_FLAGS_DMA_ALIAS_DEVFN = (__force pci_dev_flags_t) (1 << 4), + /* Use a PCIe-to-PCI bridge alias even if !pci_is_pcie */ + PCI_DEV_FLAG_PCIE_BRIDGE_ALIAS = (__force pci_dev_flags_t) (1 << 5), + /* Do not use bus resets for device */ + PCI_DEV_FLAGS_NO_BUS_RESET = (__force pci_dev_flags_t) (1 << 6), + /* Do not use PM reset even if device advertises NoSoftRst- */ + PCI_DEV_FLAGS_NO_PM_RESET = (__force pci_dev_flags_t) (1 << 7), +}; + +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 { + u16 cap_nr; + bool cap_extended; + 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 */ + u8 dma_alias_devfn;/* devfn of DMA alias, if any */ + + 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 ignore_hotplug:1; /* Ignore hotplug events */ + 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 no_64bit_msi:1; /* device may only use 32-bit MSIs */ + 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 */ + unsigned int irq_managed:1; + 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; + const struct attribute_group **msi_irq_groups; +#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 */ + char *driver_override; /* Driver name to force a match */ +}; + +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); +} + +struct pci_host_bridge { + struct device dev; + struct pci_bus *bus; /* root bus */ + struct list_head windows; /* resource_entry */ + void (*release_fn)(struct pci_host_bridge *); + void *release_data; + unsigned int ignore_reset_delay:1; /* for entire hierarchy */ +}; + +#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_controller *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 */ +#ifdef CONFIG_PCI_DOMAINS_GENERIC + int domain_nr; +#endif + + 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 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); +} + +/** + * pci_is_bridge - check if the PCI device is a bridge + * @dev: PCI device + * + * Return true if the PCI device is bridge whether it has subordinate + * or not. + */ +static inline bool pci_is_bridge(struct pci_dev *dev) +{ + return dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || + dev->hdr_type == PCI_HEADER_TYPE_CARDBUS; +} + +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; +} + +struct device *pci_get_host_bridge_device(struct pci_dev *dev); +void pci_put_host_bridge_device(struct device *dev); + +#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 -ENOTTY; + 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 -ERANGE; +} + +/* Low-level architecture-dependent routines */ + +struct pci_ops { + void __iomem *(*map_bus)(struct pci_bus *bus, unsigned int devfn, int where); + 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); + +#ifdef CONFIG_PCI_BUS_ADDR_T_64BIT +typedef u64 pci_bus_addr_t; +#else +typedef u32 pci_bus_addr_t; +#endif + +struct pci_bus_region { + pci_bus_addr_t start; + pci_bus_addr_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); + + /* PCI function reset prepare or completed */ + void (*reset_notify)(struct pci_dev *dev, bool prepare); + + /* 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 deprecated and should not be used in new code. + */ +#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 + * @vend: the vendor name + * @dev: 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(vend, dev) \ + .vendor = PCI_VENDOR_ID_##vend, .device = (dev), \ + .subvendor = PCI_ANY_ID, .subdevice = 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_bus *bus, struct pci_bus_region *region, + struct resource *res); +void pcibios_bus_to_resource(struct pci_bus *bus, 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); +void 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_and_remove_bus_device_locked(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); + +int pci_generic_config_read(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 *val); +int pci_generic_config_write(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 val); +int pci_generic_config_read32(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 *val); +int pci_generic_config_write32(struct pci_bus *bus, unsigned int devfn, + int where, int size, 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(struct pci_dev *dev, int pos, u16 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_try_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_try_reset_slot(struct pci_slot *slot); +int pci_probe_reset_bus(struct pci_bus *bus); +int pci_reset_bus(struct pci_bus *bus); +int pci_try_reset_bus(struct pci_bus *bus); +void pci_reset_secondary_bus(struct pci_dev *dev); +void pcibios_reset_secondary_bus(struct pci_dev *dev); +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); +bool pci_device_is_present(struct pci_dev *pdev); +void pci_ignore_hotplug(struct pci_dev *dev); + +/* 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); +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); +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); +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); +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); +} + +/* 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); + +/* 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); +void pci_lock_rescan_remove(void); +void pci_unlock_rescan_remove(void); + +/* 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); +int pci_claim_bridge_resource(struct pci_dev *bridge, int i); +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 long type_mask, + resource_size_t (*alignf)(void *, + const struct resource *, + resource_size_t, + resource_size_t), + void *alignf_data); + + +int pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr); + +static inline pci_bus_addr_t pci_bus_address(struct pci_dev *pdev, int bar) +{ + struct pci_bus_region region; + + pcibios_resource_to_bus(pdev->bus, ®ion, &pdev->resource[bar]); + return region.start; +} + +/* 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(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); +resource_size_t pcibios_iov_resource_alignment(struct pci_dev *dev, int resno); + +#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 <linux/pci-dma.h> +#include <linux/dmapool.h> + +#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 */ +}; + + +#ifdef CONFIG_PCI_MSI +int pci_msi_vec_count(struct pci_dev *dev); +void pci_msi_shutdown(struct pci_dev *dev); +void pci_disable_msi(struct pci_dev *dev); +int pci_msix_vec_count(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 pci_restore_msi_state(struct pci_dev *dev); +int pci_msi_enabled(void); +int pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec); +static inline int pci_enable_msi_exact(struct pci_dev *dev, int nvec) +{ + int rc = pci_enable_msi_range(dev, nvec, nvec); + if (rc < 0) + return rc; + return 0; +} +int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries, + int minvec, int maxvec); +static inline int pci_enable_msix_exact(struct pci_dev *dev, + struct msix_entry *entries, int nvec) +{ + int rc = pci_enable_msix_range(dev, entries, nvec, nvec); + if (rc < 0) + return rc; + return 0; +} +#else +static inline int pci_msi_vec_count(struct pci_dev *dev) { return -ENOSYS; } +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_vec_count(struct pci_dev *dev) { return -ENOSYS; } +static inline int pci_enable_msix(struct pci_dev *dev, + struct msix_entry *entries, int nvec) +{ return -ENOSYS; } +static inline void pci_msix_shutdown(struct pci_dev *dev) { } +static inline void pci_disable_msix(struct pci_dev *dev) { } +static inline void pci_restore_msi_state(struct pci_dev *dev) { } +static inline int pci_msi_enabled(void) { return 0; } +static inline int pci_enable_msi_range(struct pci_dev *dev, int minvec, + int maxvec) +{ return -ENOSYS; } +static inline int pci_enable_msi_exact(struct pci_dev *dev, int nvec) +{ return -ENOSYS; } +static inline int pci_enable_msix_range(struct pci_dev *dev, + struct msix_entry *entries, int minvec, int maxvec) +{ return -ENOSYS; } +static inline int pci_enable_msix_exact(struct pci_dev *dev, + struct msix_entry *entries, int nvec) +{ return -ENOSYS; } +#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 + +#ifdef CONFIG_PCIEASPM +bool pcie_aspm_support_enabled(void); +#else +static inline bool pcie_aspm_support_enabled(void) { return false; } +#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 + +#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 + +#define pci_enable_msi(pdev) pci_enable_msi_exact(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; +int pci_get_new_domain_nr(void); +#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; } +static inline int pci_get_new_domain_nr(void) { return -ENOSYS; } +#endif /* CONFIG_PCI_DOMAINS */ + +/* + * Generic implementation for PCI domain support. If your + * architecture does not need custom management of PCI + * domains then this implementation will be used + */ +#ifdef CONFIG_PCI_DOMAINS_GENERIC +static inline int pci_domain_nr(struct pci_bus *bus) +{ + return bus->domain_nr; +} +void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent); +#else +static inline void pci_bus_assign_domain_nr(struct pci_bus *bus, + struct device *parent) +{ +} +#endif + +/* 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; } +static inline int pci_get_new_domain_nr(void) { return -ENOSYS; } + +#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 <asm/pci.h> + +/* 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() */ + pci_fixup_suspend_late, /* pci_device_suspend_late() */ +}; + +/* Anonymous variables would be nice... */ +#define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, class, \ + class_shift, hook) \ + static const struct pci_fixup __PASTE(__pci_fixup_##name,__LINE__) __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, \ + 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, \ + 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, \ + 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, \ + 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##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##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##hook, vendor, device, class, \ + class_shift, hook) +#define DECLARE_PCI_FIXUP_CLASS_SUSPEND_LATE(vendor, device, class, \ + class_shift, hook) \ + DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \ + suspend_late##hook, vendor, device, \ + class, class_shift, hook) + +#define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \ + DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \ + hook, vendor, device, PCI_ANY_ID, 0, hook) +#define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \ + DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \ + hook, vendor, device, PCI_ANY_ID, 0, hook) +#define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \ + DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \ + hook, vendor, device, PCI_ANY_ID, 0, hook) +#define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \ + DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \ + hook, vendor, device, PCI_ANY_ID, 0, hook) +#define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \ + DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \ + resume##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##hook, vendor, device, \ + PCI_ANY_ID, 0, hook) +#define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \ + DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \ + suspend##hook, vendor, device, \ + PCI_ANY_ID, 0, hook) +#define DECLARE_PCI_FIXUP_SUSPEND_LATE(vendor, device, hook) \ + DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \ + suspend_late##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); +int pci_dev_specific_acs_enabled(struct pci_dev *dev, u16 acs_flags); +void pci_dev_specific_enable_acs(struct pci_dev *dev); +#else +static inline void pci_fixup_device(enum pci_fixup_pass pass, + struct pci_dev *dev) { } +static inline int pci_dev_specific_acs_enabled(struct pci_dev *dev, + u16 acs_flags) +{ + return -ENOTTY; +} +static inline void pci_dev_specific_enable_acs(struct pci_dev *dev) { } +#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) */ +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); +void pcibios_penalize_isa_irq(int irq, int active); + +#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_iov_virtfn_bus(struct pci_dev *dev, int id); +int pci_iov_virtfn_devfn(struct pci_dev *dev, int id); + +int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn); +void pci_disable_sriov(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); +resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno); +#else +static inline int pci_iov_virtfn_bus(struct pci_dev *dev, int id) +{ + return -ENOSYS; +} +static inline int pci_iov_virtfn_devfn(struct pci_dev *dev, int id) +{ + return -ENOSYS; +} +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 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; } +static inline resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno) +{ 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) { } +static inline struct device_node * +pci_device_to_OF_node(const struct pci_dev *pdev) { return NULL; } +#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 + +int pci_for_each_dma_alias(struct pci_dev *pdev, + int (*fn)(struct pci_dev *pdev, + u16 alias, void *data), void *data); + +/* helper functions for operation of device flag */ +static inline void pci_set_dev_assigned(struct pci_dev *pdev) +{ + pdev->dev_flags |= PCI_DEV_FLAGS_ASSIGNED; +} +static inline void pci_clear_dev_assigned(struct pci_dev *pdev) +{ + pdev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED; +} +static inline bool pci_is_dev_assigned(struct pci_dev *pdev) +{ + return (pdev->dev_flags & PCI_DEV_FLAGS_ASSIGNED) == PCI_DEV_FLAGS_ASSIGNED; +} +#endif /* LINUX_PCI_H */ |