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