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 int pci_create_sysfs_dev_files(struct pci_dev *pdev);
  12 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 void pci_create_firmware_label_files(struct pci_dev *pdev);
  20 void pci_remove_firmware_label_files(struct pci_dev *pdev);
  21 #endif
  22 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 int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vmai,
  29                   enum pci_mmap_api mmap_api);
  30 #endif
  31 int 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  */
  54 struct 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
  62 int pci_set_platform_pm(struct pci_platform_pm_ops *ops);
  63 void pci_update_current_state(struct pci_dev *dev, pci_power_t state);
  64 void pci_power_up(struct pci_dev *dev);
  65 void pci_disable_enabled_device(struct pci_dev *dev);
  66 int pci_finish_runtime_suspend(struct pci_dev *dev);
  67 int __pci_pme_wakeup(struct pci_dev *dev, void *ign);
  68 void pci_wakeup_bus(struct pci_bus *bus);
  69 void pci_config_pm_runtime_get(struct pci_dev *dev);
  70 void pci_config_pm_runtime_put(struct pci_dev *dev);
  71 void pci_pm_init(struct pci_dev *dev);
  72 void pci_allocate_cap_save_buffers(struct pci_dev *dev);
  73 void pci_free_cap_save_buffers(struct pci_dev *dev);
  74
  75 static 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
  81 static inline bool pci_is_bridge(struct pci_dev *pci_dev)
  82 {
  83         return !!(pci_dev->subordinate);
  84 }
  85
  86 struct 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
  92 struct 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
  98 int pci_vpd_pci22_init(struct pci_dev *dev);
  99 static 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
 107 int pci_proc_attach_device(struct pci_dev *dev);
 108 int pci_proc_detach_device(struct pci_dev *dev);
 109 int pci_proc_detach_bus(struct pci_bus *bus);
 110 #else
 111 static inline int pci_proc_attach_device(struct pci_dev *dev) { return 0; }
 112 static inline int pci_proc_detach_device(struct pci_dev *dev) { return 0; }
 113 static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; }
 114 #endif
 115
 116 /* Functions for PCI Hotplug drivers to use */
 117 int pci_hp_add_bridge(struct pci_dev *dev);
 118
 119 #ifdef HAVE_PCI_LEGACY
 120 void pci_create_legacy_files(struct pci_bus *bus);
 121 void pci_remove_legacy_files(struct pci_bus *bus);
 122 #else
 123 static inline void pci_create_legacy_files(struct pci_bus *bus) { return; }
 124 static 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 */
 128 extern struct rw_semaphore pci_bus_sem;
 129
 130 extern raw_spinlock_t pci_lock;
 131
 132 extern unsigned int pci_pm_d3_delay;
 133
 134 #ifdef CONFIG_PCI_MSI
 135 void pci_no_msi(void);
 136 void pci_msi_init_pci_dev(struct pci_dev *dev);
 137 #else
 138 static inline void pci_no_msi(void) { }
 139 static inline void pci_msi_init_pci_dev(struct pci_dev *dev) { }
 140 #endif
 141
 142 void pci_realloc_get_opt(char *);
 143
 144 static 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 }
 153 extern struct device_attribute pci_dev_attrs[];
 154 extern struct device_attribute pcibus_dev_attrs[];
 155 extern struct device_type pci_dev_type;
 156 extern 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  */
 167 static inline const struct pci_device_id *
 168 pci_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
 182 extern struct kset *pci_slots_kset;
 183
 184 struct 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
 191 enum 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
 198 bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl,
 199                                 int crs_timeout);
 200 int pci_setup_device(struct pci_dev *dev);
 201 int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
 202                     struct resource *res, unsigned int reg);
 203 int pci_resource_bar(struct pci_dev *dev, int resno, enum pci_bar_type *type);
 204 void pci_configure_ari(struct pci_dev *dev);
 205 void __ref __pci_bus_size_bridges(struct pci_bus *bus,
 206                         struct list_head *realloc_head);
 207 void __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  */
 217 static inline int pci_ari_enabled(struct pci_bus *bus)
 218 {
 219         return bus->self && bus->self->ari_enabled;
 220 }
 221
 222 void pci_reassigndev_resource_alignment(struct pci_dev *dev);
 223 void pci_disable_bridge_window(struct pci_dev *dev);
 224
 225 /* Single Root I/O Virtualization */
 226 struct 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
 247 void pci_restore_ats_state(struct pci_dev *dev);
 248 #else
 249 static inline void pci_restore_ats_state(struct pci_dev *dev)
 250 {
 251 }
 252 #endif /* CONFIG_PCI_ATS */
 253
 254 #ifdef CONFIG_PCI_IOV
 255 int pci_iov_init(struct pci_dev *dev);
 256 void pci_iov_release(struct pci_dev *dev);
 257 int pci_iov_resource_bar(struct pci_dev *dev, int resno,
 258                          enum pci_bar_type *type);
 259 resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno);
 260 void pci_restore_iov_state(struct pci_dev *dev);
 261 int pci_iov_bus_range(struct pci_bus *bus);
 262
 263 #else
 264 static inline int pci_iov_init(struct pci_dev *dev)
 265 {
 266         return -ENODEV;
 267 }
 268 static inline void pci_iov_release(struct pci_dev *dev)
 269
 270 {
 271 }
 272 static inline int pci_iov_resource_bar(struct pci_dev *dev, int resno,
 273                                        enum pci_bar_type *type)
 274 {
 275         return 0;
 276 }
 277 static inline void pci_restore_iov_state(struct pci_dev *dev)
 278 {
 279 }
 280 static inline int pci_iov_bus_range(struct pci_bus *bus)
 281 {
 282         return 0;
 283 }
 284
 285 #endif /* CONFIG_PCI_IOV */
 286
 287 unsigned long pci_cardbus_resource_alignment(struct resource *);
 288
 289 static 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
 303 void pci_enable_acs(struct pci_dev *dev);
 304
 305 struct 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
 312 int pci_dev_specific_reset(struct pci_dev *dev, int probe);
 313 #else
 314 static 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 */