linux/drivers/pci/pci.h
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   1#ifndef DRIVERS_PCI_H
   2#define DRIVERS_PCI_H
   3
   4#include <linux/workqueue.h>
   5
   6#define PCI_CFG_SPACE_SIZE      256
   7#define PCI_CFG_SPACE_EXP_SIZE  4096
   8
   9/* Functions internal to the PCI core code */
  10
  11extern int pci_uevent(struct device *dev, struct kobj_uevent_env *env);
  12extern int pci_create_sysfs_dev_files(struct pci_dev *pdev);
  13extern void pci_remove_sysfs_dev_files(struct pci_dev *pdev);
  14#if !defined(CONFIG_DMI) && !defined(CONFIG_ACPI)
  15static inline void pci_create_firmware_label_files(struct pci_dev *pdev)
  16{ return; }
  17static inline void pci_remove_firmware_label_files(struct pci_dev *pdev)
  18{ return; }
  19#else
  20extern void pci_create_firmware_label_files(struct pci_dev *pdev);
  21extern void pci_remove_firmware_label_files(struct pci_dev *pdev);
  22#endif
  23extern void pci_cleanup_rom(struct pci_dev *dev);
  24#ifdef HAVE_PCI_MMAP
  25enum pci_mmap_api {
  26        PCI_MMAP_SYSFS, /* mmap on /sys/bus/pci/devices/<BDF>/resource<N> */
  27        PCI_MMAP_PROCFS /* mmap on /proc/bus/pci/<BDF> */
  28};
  29extern int pci_mmap_fits(struct pci_dev *pdev, int resno,
  30                         struct vm_area_struct *vmai,
  31                         enum pci_mmap_api mmap_api);
  32#endif
  33int pci_probe_reset_function(struct pci_dev *dev);
  34
  35/**
  36 * struct pci_platform_pm_ops - Firmware PM callbacks
  37 *
  38 * @is_manageable: returns 'true' if given device is power manageable by the
  39 *                 platform firmware
  40 *
  41 * @set_state: invokes the platform firmware to set the device's power state
  42 *
  43 * @choose_state: returns PCI power state of given device preferred by the
  44 *                platform; to be used during system-wide transitions from a
  45 *                sleeping state to the working state and vice versa
  46 *
  47 * @can_wakeup: returns 'true' if given device is capable of waking up the
  48 *              system from a sleeping state
  49 *
  50 * @sleep_wake: enables/disables the system wake up capability of given device
  51 *
  52 * @run_wake: enables/disables the platform to generate run-time wake-up events
  53 *              for given device (the device's wake-up capability has to be
  54 *              enabled by @sleep_wake for this feature to work)
  55 *
  56 * If given platform is generally capable of power managing PCI devices, all of
  57 * these callbacks are mandatory.
  58 */
  59struct pci_platform_pm_ops {
  60        bool (*is_manageable)(struct pci_dev *dev);
  61        int (*set_state)(struct pci_dev *dev, pci_power_t state);
  62        pci_power_t (*choose_state)(struct pci_dev *dev);
  63        bool (*can_wakeup)(struct pci_dev *dev);
  64        int (*sleep_wake)(struct pci_dev *dev, bool enable);
  65        int (*run_wake)(struct pci_dev *dev, bool enable);
  66};
  67
  68extern int pci_set_platform_pm(struct pci_platform_pm_ops *ops);
  69extern void pci_update_current_state(struct pci_dev *dev, pci_power_t state);
  70extern void pci_power_up(struct pci_dev *dev);
  71extern void pci_disable_enabled_device(struct pci_dev *dev);
  72extern int pci_finish_runtime_suspend(struct pci_dev *dev);
  73extern int __pci_pme_wakeup(struct pci_dev *dev, void *ign);
  74extern void pci_wakeup_bus(struct pci_bus *bus);
  75extern void pci_pm_init(struct pci_dev *dev);
  76extern void platform_pci_wakeup_init(struct pci_dev *dev);
  77extern void pci_allocate_cap_save_buffers(struct pci_dev *dev);
  78void pci_free_cap_save_buffers(struct pci_dev *dev);
  79
  80static inline void pci_wakeup_event(struct pci_dev *dev)
  81{
  82        /* Wait 100 ms before the system can be put into a sleep state. */
  83        pm_wakeup_event(&dev->dev, 100);
  84}
  85
  86static inline bool pci_is_bridge(struct pci_dev *pci_dev)
  87{
  88        return !!(pci_dev->subordinate);
  89}
  90
  91struct pci_vpd_ops {
  92        ssize_t (*read)(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
  93        ssize_t (*write)(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
  94        void (*release)(struct pci_dev *dev);
  95};
  96
  97struct pci_vpd {
  98        unsigned int len;
  99        const struct pci_vpd_ops *ops;
 100        struct bin_attribute *attr; /* descriptor for sysfs VPD entry */
 101};
 102
 103extern int pci_vpd_pci22_init(struct pci_dev *dev);
 104static inline void pci_vpd_release(struct pci_dev *dev)
 105{
 106        if (dev->vpd)
 107                dev->vpd->ops->release(dev);
 108}
 109
 110/* PCI /proc functions */
 111#ifdef CONFIG_PROC_FS
 112extern int pci_proc_attach_device(struct pci_dev *dev);
 113extern int pci_proc_detach_device(struct pci_dev *dev);
 114extern int pci_proc_detach_bus(struct pci_bus *bus);
 115#else
 116static inline int pci_proc_attach_device(struct pci_dev *dev) { return 0; }
 117static inline int pci_proc_detach_device(struct pci_dev *dev) { return 0; }
 118static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; }
 119#endif
 120
 121/* Functions for PCI Hotplug drivers to use */
 122int pci_hp_add_bridge(struct pci_dev *dev);
 123
 124#ifdef HAVE_PCI_LEGACY
 125extern void pci_create_legacy_files(struct pci_bus *bus);
 126extern void pci_remove_legacy_files(struct pci_bus *bus);
 127#else
 128static inline void pci_create_legacy_files(struct pci_bus *bus) { return; }
 129static inline void pci_remove_legacy_files(struct pci_bus *bus) { return; }
 130#endif
 131
 132/* Lock for read/write access to pci device and bus lists */
 133extern struct rw_semaphore pci_bus_sem;
 134
 135extern raw_spinlock_t pci_lock;
 136
 137extern unsigned int pci_pm_d3_delay;
 138
 139#ifdef CONFIG_PCI_MSI
 140void pci_no_msi(void);
 141extern void pci_msi_init_pci_dev(struct pci_dev *dev);
 142#else
 143static inline void pci_no_msi(void) { }
 144static inline void pci_msi_init_pci_dev(struct pci_dev *dev) { }
 145#endif
 146
 147void pci_realloc_get_opt(char *);
 148
 149static inline int pci_no_d1d2(struct pci_dev *dev)
 150{
 151        unsigned int parent_dstates = 0;
 152
 153        if (dev->bus->self)
 154                parent_dstates = dev->bus->self->no_d1d2;
 155        return (dev->no_d1d2 || parent_dstates);
 156
 157}
 158extern struct device_attribute pci_dev_attrs[];
 159extern struct device_attribute pcibus_dev_attrs[];
 160#ifdef CONFIG_HOTPLUG
 161extern struct bus_attribute pci_bus_attrs[];
 162#else
 163#define pci_bus_attrs   NULL
 164#endif
 165
 166
 167/**
 168 * pci_match_one_device - Tell if a PCI device structure has a matching
 169 *                        PCI device id structure
 170 * @id: single PCI device id structure to match
 171 * @dev: the PCI device structure to match against
 172 *
 173 * Returns the matching pci_device_id structure or %NULL if there is no match.
 174 */
 175static inline const struct pci_device_id *
 176pci_match_one_device(const struct pci_device_id *id, const struct pci_dev *dev)
 177{
 178        if ((id->vendor == PCI_ANY_ID || id->vendor == dev->vendor) &&
 179            (id->device == PCI_ANY_ID || id->device == dev->device) &&
 180            (id->subvendor == PCI_ANY_ID || id->subvendor == dev->subsystem_vendor) &&
 181            (id->subdevice == PCI_ANY_ID || id->subdevice == dev->subsystem_device) &&
 182            !((id->class ^ dev->class) & id->class_mask))
 183                return id;
 184        return NULL;
 185}
 186
 187/* PCI slot sysfs helper code */
 188#define to_pci_slot(s) container_of(s, struct pci_slot, kobj)
 189
 190extern struct kset *pci_slots_kset;
 191
 192struct pci_slot_attribute {
 193        struct attribute attr;
 194        ssize_t (*show)(struct pci_slot *, char *);
 195        ssize_t (*store)(struct pci_slot *, const char *, size_t);
 196};
 197#define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr)
 198
 199enum pci_bar_type {
 200        pci_bar_unknown,        /* Standard PCI BAR probe */
 201        pci_bar_io,             /* An io port BAR */
 202        pci_bar_mem32,          /* A 32-bit memory BAR */
 203        pci_bar_mem64,          /* A 64-bit memory BAR */
 204};
 205
 206bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl,
 207                                int crs_timeout);
 208extern int pci_setup_device(struct pci_dev *dev);
 209extern int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
 210                                struct resource *res, unsigned int reg);
 211extern int pci_resource_bar(struct pci_dev *dev, int resno,
 212                            enum pci_bar_type *type);
 213extern int pci_bus_add_child(struct pci_bus *bus);
 214extern void pci_enable_ari(struct pci_dev *dev);
 215/**
 216 * pci_ari_enabled - query ARI forwarding status
 217 * @bus: the PCI bus
 218 *
 219 * Returns 1 if ARI forwarding is enabled, or 0 if not enabled;
 220 */
 221static inline int pci_ari_enabled(struct pci_bus *bus)
 222{
 223        return bus->self && bus->self->ari_enabled;
 224}
 225
 226void pci_reassigndev_resource_alignment(struct pci_dev *dev);
 227extern void pci_disable_bridge_window(struct pci_dev *dev);
 228
 229/* Single Root I/O Virtualization */
 230struct pci_sriov {
 231        int pos;                /* capability position */
 232        int nres;               /* number of resources */
 233        u32 cap;                /* SR-IOV Capabilities */
 234        u16 ctrl;               /* SR-IOV Control */
 235        u16 total;              /* total VFs associated with the PF */
 236        u16 initial;            /* initial VFs associated with the PF */
 237        u16 nr_virtfn;          /* number of VFs available */
 238        u16 offset;             /* first VF Routing ID offset */
 239        u16 stride;             /* following VF stride */
 240        u32 pgsz;               /* page size for BAR alignment */
 241        u8 link;                /* Function Dependency Link */
 242        struct pci_dev *dev;    /* lowest numbered PF */
 243        struct pci_dev *self;   /* this PF */
 244        struct mutex lock;      /* lock for VF bus */
 245        struct work_struct mtask; /* VF Migration task */
 246        u8 __iomem *mstate;     /* VF Migration State Array */
 247};
 248
 249#ifdef CONFIG_PCI_ATS
 250extern void pci_restore_ats_state(struct pci_dev *dev);
 251#else
 252static inline void pci_restore_ats_state(struct pci_dev *dev)
 253{
 254}
 255#endif /* CONFIG_PCI_ATS */
 256
 257#ifdef CONFIG_PCI_IOV
 258extern int pci_iov_init(struct pci_dev *dev);
 259extern void pci_iov_release(struct pci_dev *dev);
 260extern int pci_iov_resource_bar(struct pci_dev *dev, int resno,
 261                                enum pci_bar_type *type);
 262extern resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev,
 263                                                    int resno);
 264extern void pci_restore_iov_state(struct pci_dev *dev);
 265extern int pci_iov_bus_range(struct pci_bus *bus);
 266
 267#else
 268static inline int pci_iov_init(struct pci_dev *dev)
 269{
 270        return -ENODEV;
 271}
 272static inline void pci_iov_release(struct pci_dev *dev)
 273
 274{
 275}
 276static inline int pci_iov_resource_bar(struct pci_dev *dev, int resno,
 277                                       enum pci_bar_type *type)
 278{
 279        return 0;
 280}
 281static inline void pci_restore_iov_state(struct pci_dev *dev)
 282{
 283}
 284static inline int pci_iov_bus_range(struct pci_bus *bus)
 285{
 286        return 0;
 287}
 288
 289#endif /* CONFIG_PCI_IOV */
 290
 291extern unsigned long pci_cardbus_resource_alignment(struct resource *);
 292
 293static inline resource_size_t pci_resource_alignment(struct pci_dev *dev,
 294                                         struct resource *res)
 295{
 296#ifdef CONFIG_PCI_IOV
 297        int resno = res - dev->resource;
 298
 299        if (resno >= PCI_IOV_RESOURCES && resno <= PCI_IOV_RESOURCE_END)
 300                return pci_sriov_resource_alignment(dev, resno);
 301#endif
 302        if (dev->class >> 8  == PCI_CLASS_BRIDGE_CARDBUS)
 303                return pci_cardbus_resource_alignment(res);
 304        return resource_alignment(res);
 305}
 306
 307extern void pci_enable_acs(struct pci_dev *dev);
 308
 309struct pci_dev_reset_methods {
 310        u16 vendor;
 311        u16 device;
 312        int (*reset)(struct pci_dev *dev, int probe);
 313};
 314
 315#ifdef CONFIG_PCI_QUIRKS
 316extern int pci_dev_specific_reset(struct pci_dev *dev, int probe);
 317#else
 318static inline int pci_dev_specific_reset(struct pci_dev *dev, int probe)
 319{
 320        return -ENOTTY;
 321}
 322#endif
 323
 324#endif /* DRIVERS_PCI_H */
 325
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