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 #ifndef CONFIG_DMI
  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_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_pm_init(struct pci_dev *dev);
  74 extern void platform_pci_wakeup_init(struct pci_dev *dev);
  75 extern void pci_allocate_cap_save_buffers(struct pci_dev *dev);
  76
  77 static inline void pci_wakeup_event(struct pci_dev *dev)
  78 {
  79         /* Wait 100 ms before the system can be put into a sleep state. */
  80         pm_wakeup_event(&dev->dev, 100);
  81 }
  82
  83 static inline bool pci_is_bridge(struct pci_dev *pci_dev)
  84 {
  85         return !!(pci_dev->subordinate);
  86 }
  87
  88 extern int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val);
  89 extern int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val);
  90 extern int pci_user_read_config_dword(struct pci_dev *dev, int where, u32 *val);
  91 extern int pci_user_write_config_byte(struct pci_dev *dev, int where, u8 val);
  92 extern int pci_user_write_config_word(struct pci_dev *dev, int where, u16 val);
  93 extern int pci_user_write_config_dword(struct pci_dev *dev, int where, u32 val);
  94
  95 struct pci_vpd_ops {
  96         ssize_t (*read)(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
  97         ssize_t (*write)(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
  98         void (*release)(struct pci_dev *dev);
  99 };
 100
 101 struct pci_vpd {
 102         unsigned int len;
 103         const struct pci_vpd_ops *ops;
 104         struct bin_attribute *attr; /* descriptor for sysfs VPD entry */
 105 };
 106
 107 extern int pci_vpd_pci22_init(struct pci_dev *dev);
 108 static inline void pci_vpd_release(struct pci_dev *dev)
 109 {
 110         if (dev->vpd)
 111                 dev->vpd->ops->release(dev);
 112 }
 113
 114 /* PCI /proc functions */
 115 #ifdef CONFIG_PROC_FS
 116 extern int pci_proc_attach_device(struct pci_dev *dev);
 117 extern int pci_proc_detach_device(struct pci_dev *dev);
 118 extern int pci_proc_detach_bus(struct pci_bus *bus);
 119 #else
 120 static inline int pci_proc_attach_device(struct pci_dev *dev) { return 0; }
 121 static inline int pci_proc_detach_device(struct pci_dev *dev) { return 0; }
 122 static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; }
 123 #endif
 124
 125 /* Functions for PCI Hotplug drivers to use */
 126 extern unsigned int pci_do_scan_bus(struct pci_bus *bus);
 127
 128 #ifdef HAVE_PCI_LEGACY
 129 extern void pci_create_legacy_files(struct pci_bus *bus);
 130 extern void pci_remove_legacy_files(struct pci_bus *bus);
 131 #else
 132 static inline void pci_create_legacy_files(struct pci_bus *bus) { return; }
 133 static inline void pci_remove_legacy_files(struct pci_bus *bus) { return; }
 134 #endif
 135
 136 /* Lock for read/write access to pci device and bus lists */
 137 extern struct rw_semaphore pci_bus_sem;
 138
 139 extern unsigned int pci_pm_d3_delay;
 140
 141 #ifdef CONFIG_PCI_MSI
 142 void pci_no_msi(void);
 143 extern void pci_msi_init_pci_dev(struct pci_dev *dev);
 144 #else
 145 static inline void pci_no_msi(void) { }
 146 static inline void pci_msi_init_pci_dev(struct pci_dev *dev) { }
 147 #endif
 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 dev_attr_cpuaffinity;
 160 extern struct device_attribute dev_attr_cpulistaffinity;
 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 struct pci_dev *pci_find_upstream_pcie_bridge(struct pci_dev *pdev);
 189
 190 /* PCI slot sysfs helper code */
 191 #define to_pci_slot(s) container_of(s, struct pci_slot, kobj)
 192
 193 extern struct kset *pci_slots_kset;
 194
 195 struct pci_slot_attribute {
 196         struct attribute attr;
 197         ssize_t (*show)(struct pci_slot *, char *);
 198         ssize_t (*store)(struct pci_slot *, const char *, size_t);
 199 };
 200 #define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr)
 201
 202 enum pci_bar_type {
 203         pci_bar_unknown,        /* Standard PCI BAR probe */
 204         pci_bar_io,             /* An io port BAR */
 205         pci_bar_mem32,          /* A 32-bit memory BAR */
 206         pci_bar_mem64,          /* A 64-bit memory BAR */
 207 };
 208
 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 #ifdef CONFIG_PCI_QUIRKS
 228 extern int pci_is_reassigndev(struct pci_dev *dev);
 229 resource_size_t pci_specified_resource_alignment(struct pci_dev *dev);
 230 extern void pci_disable_bridge_window(struct pci_dev *dev);
 231 #endif
 232
 233 /* Single Root I/O Virtualization */
 234 struct pci_sriov {
 235         int pos;                /* capability position */
 236         int nres;               /* number of resources */
 237         u32 cap;                /* SR-IOV Capabilities */
 238         u16 ctrl;               /* SR-IOV Control */
 239         u16 total;              /* total VFs associated with the PF */
 240         u16 initial;            /* initial VFs associated with the PF */
 241         u16 nr_virtfn;          /* number of VFs available */
 242         u16 offset;             /* first VF Routing ID offset */
 243         u16 stride;             /* following VF stride */
 244         u32 pgsz;               /* page size for BAR alignment */
 245         u8 link;                /* Function Dependency Link */
 246         struct pci_dev *dev;    /* lowest numbered PF */
 247         struct pci_dev *self;   /* this PF */
 248         struct mutex lock;      /* lock for VF bus */
 249         struct work_struct mtask; /* VF Migration task */
 250         u8 __iomem *mstate;     /* VF Migration State Array */
 251 };
 252
 253 /* Address Translation Service */
 254 struct pci_ats {
 255         int pos;        /* capability position */
 256         int stu;        /* Smallest Translation Unit */
 257         int qdep;       /* Invalidate Queue Depth */
 258         int ref_cnt;    /* Physical Function reference count */
 259         unsigned int is_enabled:1;      /* Enable bit is set */
 260 };
 261
 262 #ifdef CONFIG_PCI_IOV
 263 extern int pci_iov_init(struct pci_dev *dev);
 264 extern void pci_iov_release(struct pci_dev *dev);
 265 extern int pci_iov_resource_bar(struct pci_dev *dev, int resno,
 266                                 enum pci_bar_type *type);
 267 extern resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev,
 268                                                     int resno);
 269 extern void pci_restore_iov_state(struct pci_dev *dev);
 270 extern int pci_iov_bus_range(struct pci_bus *bus);
 271
 272 extern int pci_enable_ats(struct pci_dev *dev, int ps);
 273 extern void pci_disable_ats(struct pci_dev *dev);
 274 extern int pci_ats_queue_depth(struct pci_dev *dev);
 275 /**
 276  * pci_ats_enabled - query the ATS status
 277  * @dev: the PCI device
 278  *
 279  * Returns 1 if ATS capability is enabled, or 0 if not.
 280  */
 281 static inline int pci_ats_enabled(struct pci_dev *dev)
 282 {
 283         return dev->ats && dev->ats->is_enabled;
 284 }
 285 #else
 286 static inline int pci_iov_init(struct pci_dev *dev)
 287 {
 288         return -ENODEV;
 289 }
 290 static inline void pci_iov_release(struct pci_dev *dev)
 291
 292 {
 293 }
 294 static inline int pci_iov_resource_bar(struct pci_dev *dev, int resno,
 295                                        enum pci_bar_type *type)
 296 {
 297         return 0;
 298 }
 299 static inline void pci_restore_iov_state(struct pci_dev *dev)
 300 {
 301 }
 302 static inline int pci_iov_bus_range(struct pci_bus *bus)
 303 {
 304         return 0;
 305 }
 306
 307 static inline int pci_enable_ats(struct pci_dev *dev, int ps)
 308 {
 309         return -ENODEV;
 310 }
 311 static inline void pci_disable_ats(struct pci_dev *dev)
 312 {
 313 }
 314 static inline int pci_ats_queue_depth(struct pci_dev *dev)
 315 {
 316         return -ENODEV;
 317 }
 318 static inline int pci_ats_enabled(struct pci_dev *dev)
 319 {
 320         return 0;
 321 }
 322 #endif /* CONFIG_PCI_IOV */
 323
 324 static inline resource_size_t pci_resource_alignment(struct pci_dev *dev,
 325                                          struct resource *res)
 326 {
 327 #ifdef CONFIG_PCI_IOV
 328         int resno = res - dev->resource;
 329
 330         if (resno >= PCI_IOV_RESOURCES && resno <= PCI_IOV_RESOURCE_END)
 331                 return pci_sriov_resource_alignment(dev, resno);
 332 #endif
 333         return resource_alignment(res);
 334 }
 335
 336 extern void pci_enable_acs(struct pci_dev *dev);
 337
 338 struct pci_dev_reset_methods {
 339         u16 vendor;
 340         u16 device;
 341         int (*reset)(struct pci_dev *dev, int probe);
 342 };
 343
 344 #ifdef CONFIG_PCI_QUIRKS
 345 extern int pci_dev_specific_reset(struct pci_dev *dev, int probe);
 346 #else
 347 static inline int pci_dev_specific_reset(struct pci_dev *dev, int probe)
 348 {
 349         return -ENOTTY;
 350 }
 351 #endif
 352
 353 #endif /* DRIVERS_PCI_H */