drivers/pci/pci.h

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