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