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_uevent(struct device *dev, struct kobj_uevent_env *env);
  12 extern int pci_create_sysfs_dev_files(struct pci_dev *pdev);
  13 extern void pci_remove_sysfs_dev_files(struct pci_dev *pdev);
  14 #if !defined(CONFIG_DMI) && !defined(CONFIG_ACPI)
  15 static inline void pci_create_firmware_label_files(struct pci_dev *pdev)
  16 { return; }
  17 static inline void pci_remove_firmware_label_files(struct pci_dev *pdev)
  18 { return; }
  19 #else
  20 extern void pci_create_firmware_label_files(struct pci_dev *pdev);
  21 extern void pci_remove_firmware_label_files(struct pci_dev *pdev);
  22 #endif
  23 extern void pci_cleanup_rom(struct pci_dev *dev);
  24 #ifdef HAVE_PCI_MMAP
  25 enum 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 };
  29 extern 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
  33 int 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  */
  59 struct 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
  68 extern int pci_set_platform_pm(struct pci_platform_pm_ops *ops);
  69 extern void pci_update_current_state(struct pci_dev *dev, pci_power_t state);
  70 extern void pci_power_up(struct pci_dev *dev);
  71 extern void pci_disable_enabled_device(struct pci_dev *dev);
  72 extern int pci_finish_runtime_suspend(struct pci_dev *dev);
  73 extern int __pci_pme_wakeup(struct pci_dev *dev, void *ign);
  74 extern void pci_wakeup_bus(struct pci_bus *bus);
  75 extern void pci_pm_init(struct pci_dev *dev);
  76 extern void platform_pci_wakeup_init(struct pci_dev *dev);
  77 extern void pci_allocate_cap_save_buffers(struct pci_dev *dev);
  78 void pci_free_cap_save_buffers(struct pci_dev *dev);
  79
  80 static 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
  86 static inline bool pci_is_bridge(struct pci_dev *pci_dev)
  87 {
  88         return !!(pci_dev->subordinate);
  89 }
  90
  91 struct 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
  97 struct 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
 103 extern int pci_vpd_pci22_init(struct pci_dev *dev);
 104 static 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
 112 extern int pci_proc_attach_device(struct pci_dev *dev);
 113 extern int pci_proc_detach_device(struct pci_dev *dev);
 114 extern int pci_proc_detach_bus(struct pci_bus *bus);
 115 #else
 116 static inline int pci_proc_attach_device(struct pci_dev *dev) { return 0; }
 117 static inline int pci_proc_detach_device(struct pci_dev *dev) { return 0; }
 118 static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; }
 119 #endif
 120
 121 /* Functions for PCI Hotplug drivers to use */
 122 int pci_hp_add_bridge(struct pci_dev *dev);
 123
 124 #ifdef HAVE_PCI_LEGACY
 125 extern void pci_create_legacy_files(struct pci_bus *bus);
 126 extern void pci_remove_legacy_files(struct pci_bus *bus);
 127 #else
 128 static inline void pci_create_legacy_files(struct pci_bus *bus) { return; }
 129 static 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 */
 133 extern struct rw_semaphore pci_bus_sem;
 134
 135 extern raw_spinlock_t pci_lock;
 136
 137 extern unsigned int pci_pm_d3_delay;
 138
 139 #ifdef CONFIG_PCI_MSI
 140 void pci_no_msi(void);
 141 extern void pci_msi_init_pci_dev(struct pci_dev *dev);
 142 #else
 143 static inline void pci_no_msi(void) { }
 144 static inline void pci_msi_init_pci_dev(struct pci_dev *dev) { }
 145 #endif
 146
 147 void pci_realloc_get_opt(char *);
 148
 149 static 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 }
 158 extern struct device_attribute pci_dev_attrs[];
 159 extern struct device_attribute pcibus_dev_attrs[];
 160 extern struct device_type pci_dev_type;
 161 #ifdef CONFIG_HOTPLUG
 162 extern struct bus_attribute pci_bus_attrs[];
 163 #else
 164 #define pci_bus_attrs   NULL
 165 #endif
 166
 167
 168 /**
 169  * pci_match_one_device - Tell if a PCI device structure has a matching
 170  *                        PCI device id structure
 171  * @id: single PCI device id structure to match
 172  * @dev: the PCI device structure to match against
 173  *
 174  * Returns the matching pci_device_id structure or %NULL if there is no match.
 175  */
 176 static inline const struct pci_device_id *
 177 pci_match_one_device(const struct pci_device_id *id, const struct pci_dev *dev)
 178 {
 179         if ((id->vendor == PCI_ANY_ID || id->vendor == dev->vendor) &&
 180             (id->device == PCI_ANY_ID || id->device == dev->device) &&
 181             (id->subvendor == PCI_ANY_ID || id->subvendor == dev->subsystem_vendor) &&
 182             (id->subdevice == PCI_ANY_ID || id->subdevice == dev->subsystem_device) &&
 183             !((id->class ^ dev->class) & id->class_mask))
 184                 return id;
 185         return NULL;
 186 }
 187
 188 /* PCI slot sysfs helper code */
 189 #define to_pci_slot(s) container_of(s, struct pci_slot, kobj)
 190
 191 extern struct kset *pci_slots_kset;
 192
 193 struct pci_slot_attribute {
 194         struct attribute attr;
 195         ssize_t (*show)(struct pci_slot *, char *);
 196         ssize_t (*store)(struct pci_slot *, const char *, size_t);
 197 };
 198 #define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr)
 199
 200 enum pci_bar_type {
 201         pci_bar_unknown,        /* Standard PCI BAR probe */
 202         pci_bar_io,             /* An io port BAR */
 203         pci_bar_mem32,          /* A 32-bit memory BAR */
 204         pci_bar_mem64,          /* A 64-bit memory BAR */
 205 };
 206
 207 bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl,
 208                                 int crs_timeout);
 209 extern int pci_setup_device(struct pci_dev *dev);
 210 extern int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
 211                                 struct resource *res, unsigned int reg);
 212 extern int pci_resource_bar(struct pci_dev *dev, int resno,
 213                             enum pci_bar_type *type);
 214 extern int pci_bus_add_child(struct pci_bus *bus);
 215 extern void pci_enable_ari(struct pci_dev *dev);
 216 /**
 217  * pci_ari_enabled - query ARI forwarding status
 218  * @bus: the PCI bus
 219  *
 220  * Returns 1 if ARI forwarding is enabled, or 0 if not enabled;
 221  */
 222 static inline int pci_ari_enabled(struct pci_bus *bus)
 223 {
 224         return bus->self && bus->self->ari_enabled;
 225 }
 226
 227 void pci_reassigndev_resource_alignment(struct pci_dev *dev);
 228 extern void pci_disable_bridge_window(struct pci_dev *dev);
 229
 230 /* Single Root I/O Virtualization */
 231 struct pci_sriov {
 232         int pos;                /* capability position */
 233         int nres;               /* number of resources */
 234         u32 cap;                /* SR-IOV Capabilities */
 235         u16 ctrl;               /* SR-IOV Control */
 236         u16 total_VFs;          /* total VFs associated with the PF */
 237         u16 initial_VFs;        /* initial VFs associated with the PF */
 238         u16 num_VFs;            /* number of VFs available */
 239         u16 offset;             /* first VF Routing ID offset */
 240         u16 stride;             /* following VF stride */
 241         u32 pgsz;               /* page size for BAR alignment */
 242         u8 link;                /* Function Dependency Link */
 243         u16 driver_max_VFs;     /* max num VFs driver supports */
 244         struct pci_dev *dev;    /* lowest numbered PF */
 245         struct pci_dev *self;   /* this PF */
 246         struct mutex lock;      /* lock for VF bus */
 247         struct work_struct mtask; /* VF Migration task */
 248         u8 __iomem *mstate;     /* VF Migration State Array */
 249 };
 250
 251 #ifdef CONFIG_PCI_ATS
 252 extern void pci_restore_ats_state(struct pci_dev *dev);
 253 #else
 254 static inline void pci_restore_ats_state(struct pci_dev *dev)
 255 {
 256 }
 257 #endif /* CONFIG_PCI_ATS */
 258
 259 #ifdef CONFIG_PCI_IOV
 260 extern int pci_iov_init(struct pci_dev *dev);
 261 extern void pci_iov_release(struct pci_dev *dev);
 262 extern int pci_iov_resource_bar(struct pci_dev *dev, int resno,
 263                                 enum pci_bar_type *type);
 264 extern resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev,
 265                                                     int resno);
 266 extern void pci_restore_iov_state(struct pci_dev *dev);
 267 extern int pci_iov_bus_range(struct pci_bus *bus);
 268
 269 #else
 270 static inline int pci_iov_init(struct pci_dev *dev)
 271 {
 272         return -ENODEV;
 273 }
 274 static inline void pci_iov_release(struct pci_dev *dev)
 275
 276 {
 277 }
 278 static inline int pci_iov_resource_bar(struct pci_dev *dev, int resno,
 279                                        enum pci_bar_type *type)
 280 {
 281         return 0;
 282 }
 283 static inline void pci_restore_iov_state(struct pci_dev *dev)
 284 {
 285 }
 286 static inline int pci_iov_bus_range(struct pci_bus *bus)
 287 {
 288         return 0;
 289 }
 290
 291 #endif /* CONFIG_PCI_IOV */
 292
 293 extern unsigned long pci_cardbus_resource_alignment(struct resource *);
 294
 295 static inline resource_size_t pci_resource_alignment(struct pci_dev *dev,
 296                                          struct resource *res)
 297 {
 298 #ifdef CONFIG_PCI_IOV
 299         int resno = res - dev->resource;
 300
 301         if (resno >= PCI_IOV_RESOURCES && resno <= PCI_IOV_RESOURCE_END)
 302                 return pci_sriov_resource_alignment(dev, resno);
 303 #endif
 304         if (dev->class >> 8  == PCI_CLASS_BRIDGE_CARDBUS)
 305                 return pci_cardbus_resource_alignment(res);
 306         return resource_alignment(res);
 307 }
 308
 309 extern void pci_enable_acs(struct pci_dev *dev);
 310
 311 struct pci_dev_reset_methods {
 312         u16 vendor;
 313         u16 device;
 314         int (*reset)(struct pci_dev *dev, int probe);
 315 };
 316
 317 #ifdef CONFIG_PCI_QUIRKS
 318 extern int pci_dev_specific_reset(struct pci_dev *dev, int probe);
 319 #else
 320 static inline int pci_dev_specific_reset(struct pci_dev *dev, int probe)
 321 {
 322         return -ENOTTY;
 323 }
 324 #endif
 325
 326 #endif /* DRIVERS_PCI_H */