drivers/pci/pci.h

   1 #ifndef DRIVERS_PCI_H
   2 #define DRIVERS_PCI_H
   3
   4 #define PCI_CFG_SPACE_SIZE      256
   5 #define PCI_CFG_SPACE_EXP_SIZE  4096
   6
   7 extern const unsigned char pcie_link_speed[];
   8
   9 bool pcie_cap_has_lnkctl(const struct pci_dev *dev);
  10
  11 /* Functions internal to the PCI core code */
  12
  13 int pci_create_sysfs_dev_files(struct pci_dev *pdev);
  14 void pci_remove_sysfs_dev_files(struct pci_dev *pdev);
  15 #if !defined(CONFIG_DMI) && !defined(CONFIG_ACPI)
  16 static inline void pci_create_firmware_label_files(struct pci_dev *pdev)
  17 { return; }
  18 static inline void pci_remove_firmware_label_files(struct pci_dev *pdev)
  19 { return; }
  20 #else
  21 void pci_create_firmware_label_files(struct pci_dev *pdev);
  22 void pci_remove_firmware_label_files(struct pci_dev *pdev);
  23 #endif
  24 void pci_cleanup_rom(struct pci_dev *dev);
  25 #ifdef HAVE_PCI_MMAP
  26 enum pci_mmap_api {
  27         PCI_MMAP_SYSFS, /* mmap on /sys/bus/pci/devices/<BDF>/resource<N> */
  28         PCI_MMAP_PROCFS /* mmap on /proc/bus/pci/<BDF> */
  29 };
  30 int pci_mmap_fits(struct pci_dev *pdev, int resno, 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  * @sleep_wake: enables/disables the system wake up capability of given device
  48  *
  49  * @run_wake: enables/disables the platform to generate run-time wake-up events
  50  *              for given device (the device's wake-up capability has to be
  51  *              enabled by @sleep_wake for this feature to work)
  52  *
  53  * If given platform is generally capable of power managing PCI devices, all of
  54  * these callbacks are mandatory.
  55  */
  56 struct pci_platform_pm_ops {
  57         bool (*is_manageable)(struct pci_dev *dev);
  58         int (*set_state)(struct pci_dev *dev, pci_power_t state);
  59         pci_power_t (*choose_state)(struct pci_dev *dev);
  60         int (*sleep_wake)(struct pci_dev *dev, bool enable);
  61         int (*run_wake)(struct pci_dev *dev, bool enable);
  62 };
  63
  64 int pci_set_platform_pm(struct pci_platform_pm_ops *ops);
  65 void pci_update_current_state(struct pci_dev *dev, pci_power_t state);
  66 void pci_power_up(struct pci_dev *dev);
  67 void pci_disable_enabled_device(struct pci_dev *dev);
  68 int pci_finish_runtime_suspend(struct pci_dev *dev);
  69 int __pci_pme_wakeup(struct pci_dev *dev, void *ign);
  70 void pci_config_pm_runtime_get(struct pci_dev *dev);
  71 void pci_config_pm_runtime_put(struct pci_dev *dev);
  72 void pci_pm_init(struct pci_dev *dev);
  73 void pci_allocate_cap_save_buffers(struct pci_dev *dev);
  74 void pci_free_cap_save_buffers(struct pci_dev *dev);
  75
  76 static 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
  82 static inline bool pci_has_subordinate(struct pci_dev *pci_dev)
  83 {
  84         return !!(pci_dev->subordinate);
  85 }
  86
  87 struct 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
  93 struct 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
  99 int pci_vpd_pci22_init(struct pci_dev *dev);
 100 static 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
 108 int pci_proc_attach_device(struct pci_dev *dev);
 109 int pci_proc_detach_device(struct pci_dev *dev);
 110 int pci_proc_detach_bus(struct pci_bus *bus);
 111 #else
 112 static inline int pci_proc_attach_device(struct pci_dev *dev) { return 0; }
 113 static inline int pci_proc_detach_device(struct pci_dev *dev) { return 0; }
 114 static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; }
 115 #endif
 116
 117 /* Functions for PCI Hotplug drivers to use */
 118 int pci_hp_add_bridge(struct pci_dev *dev);
 119
 120 #ifdef HAVE_PCI_LEGACY
 121 void pci_create_legacy_files(struct pci_bus *bus);
 122 void pci_remove_legacy_files(struct pci_bus *bus);
 123 #else
 124 static inline void pci_create_legacy_files(struct pci_bus *bus) { return; }
 125 static 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 */
 129 extern struct rw_semaphore pci_bus_sem;
 130
 131 extern raw_spinlock_t pci_lock;
 132
 133 extern unsigned int pci_pm_d3_delay;
 134
 135 #ifdef CONFIG_PCI_MSI
 136 void pci_no_msi(void);
 137 void pci_msi_init_pci_dev(struct pci_dev *dev);
 138 #else
 139 static inline void pci_no_msi(void) { }
 140 static inline void pci_msi_init_pci_dev(struct pci_dev *dev) { }
 141 #endif
 142
 143 void pci_realloc_get_opt(char *);
 144
 145 static 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 }
 154 extern const struct attribute_group *pci_dev_groups[];
 155 extern const struct attribute_group *pcibus_groups[];
 156 extern struct device_type pci_dev_type;
 157 extern const struct attribute_group *pci_bus_groups[];
 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  */
 168 static inline const struct pci_device_id *
 169 pci_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
 183 extern struct kset *pci_slots_kset;
 184
 185 struct 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
 192 enum 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
 199 bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl,
 200                                 int crs_timeout);
 201 int pci_setup_device(struct pci_dev *dev);
 202 int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
 203                     struct resource *res, unsigned int reg);
 204 int pci_resource_bar(struct pci_dev *dev, int resno, enum pci_bar_type *type);
 205 void pci_configure_ari(struct pci_dev *dev);
 206 void __pci_bus_size_bridges(struct pci_bus *bus,
 207                         struct list_head *realloc_head);
 208 void __pci_bus_assign_resources(const struct pci_bus *bus,
 209                                 struct list_head *realloc_head,
 210                                 struct list_head *fail_head);
 211 bool pci_bus_clip_resource(struct pci_dev *dev, int idx);
 212
 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 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 };
 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 resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno);
 259 void pci_restore_iov_state(struct pci_dev *dev);
 260 int pci_iov_bus_range(struct pci_bus *bus);
 261
 262 #else
 263 static inline int pci_iov_init(struct pci_dev *dev)
 264 {
 265         return -ENODEV;
 266 }
 267 static inline void pci_iov_release(struct pci_dev *dev)
 268
 269 {
 270 }
 271 static inline int pci_iov_resource_bar(struct pci_dev *dev, int resno)
 272 {
 273         return 0;
 274 }
 275 static inline void pci_restore_iov_state(struct pci_dev *dev)
 276 {
 277 }
 278 static inline int pci_iov_bus_range(struct pci_bus *bus)
 279 {
 280         return 0;
 281 }
 282
 283 #endif /* CONFIG_PCI_IOV */
 284
 285 unsigned long pci_cardbus_resource_alignment(struct resource *);
 286
 287 static 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
 301 void pci_enable_acs(struct pci_dev *dev);
 302
 303 struct 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
 310 int pci_dev_specific_reset(struct pci_dev *dev, int probe);
 311 #else
 312 static 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 */