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 extern const unsigned char pcix_bus_speed[];
  10 extern const unsigned char pcie_link_speed[];
  11
  12 /* Functions internal to the PCI core code */
  13
  14 int pci_create_sysfs_dev_files(struct pci_dev *pdev);
  15 void pci_remove_sysfs_dev_files(struct pci_dev *pdev);
  16 #if !defined(CONFIG_DMI) && !defined(CONFIG_ACPI)
  17 static inline void pci_create_firmware_label_files(struct pci_dev *pdev)
  18 { return; }
  19 static inline void pci_remove_firmware_label_files(struct pci_dev *pdev)
  20 { return; }
  21 #else
  22 void pci_create_firmware_label_files(struct pci_dev *pdev);
  23 void pci_remove_firmware_label_files(struct pci_dev *pdev);
  24 #endif
  25 void pci_cleanup_rom(struct pci_dev *dev);
  26 #ifdef HAVE_PCI_MMAP
  27 enum pci_mmap_api {
  28         PCI_MMAP_SYSFS, /* mmap on /sys/bus/pci/devices/<BDF>/resource<N> */
  29         PCI_MMAP_PROCFS /* mmap on /proc/bus/pci/<BDF> */
  30 };
  31 int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vmai,
  32                   enum pci_mmap_api mmap_api);
  33 #endif
  34 int pci_probe_reset_function(struct pci_dev *dev);
  35
  36 /**
  37  * struct pci_platform_pm_ops - Firmware PM callbacks
  38  *
  39  * @is_manageable: returns 'true' if given device is power manageable by the
  40  *                 platform firmware
  41  *
  42  * @set_state: invokes the platform firmware to set the device's power state
  43  *
  44  * @choose_state: returns PCI power state of given device preferred by the
  45  *                platform; to be used during system-wide transitions from a
  46  *                sleeping state to the working state and vice versa
  47  *
  48  * @sleep_wake: enables/disables the system wake up capability of given device
  49  *
  50  * @run_wake: enables/disables the platform to generate run-time wake-up events
  51  *              for given device (the device's wake-up capability has to be
  52  *              enabled by @sleep_wake for this feature to work)
  53  *
  54  * If given platform is generally capable of power managing PCI devices, all of
  55  * these callbacks are mandatory.
  56  */
  57 struct pci_platform_pm_ops {
  58         bool (*is_manageable)(struct pci_dev *dev);
  59         int (*set_state)(struct pci_dev *dev, pci_power_t state);
  60         pci_power_t (*choose_state)(struct pci_dev *dev);
  61         int (*sleep_wake)(struct pci_dev *dev, bool enable);
  62         int (*run_wake)(struct pci_dev *dev, bool enable);
  63 };
  64
  65 int pci_set_platform_pm(struct pci_platform_pm_ops *ops);
  66 void pci_update_current_state(struct pci_dev *dev, pci_power_t state);
  67 void pci_power_up(struct pci_dev *dev);
  68 void pci_disable_enabled_device(struct pci_dev *dev);
  69 int pci_finish_runtime_suspend(struct pci_dev *dev);
  70 int __pci_pme_wakeup(struct pci_dev *dev, void *ign);
  71 void pci_wakeup_bus(struct pci_bus *bus);
  72 void pci_config_pm_runtime_get(struct pci_dev *dev);
  73 void pci_config_pm_runtime_put(struct pci_dev *dev);
  74 void pci_pm_init(struct pci_dev *dev);
  75 void pci_allocate_cap_save_buffers(struct pci_dev *dev);
  76 void pci_free_cap_save_buffers(struct pci_dev *dev);
  77
  78 static inline void pci_wakeup_event(struct pci_dev *dev)
  79 {
  80         /* Wait 100 ms before the system can be put into a sleep state. */
  81         pm_wakeup_event(&dev->dev, 100);
  82 }
  83
  84 static inline bool pci_is_bridge(struct pci_dev *pci_dev)
  85 {
  86         return !!(pci_dev->subordinate);
  87 }
  88
  89 struct pci_vpd_ops {
  90         ssize_t (*read)(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
  91         ssize_t (*write)(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
  92         void (*release)(struct pci_dev *dev);
  93 };
  94
  95 struct pci_vpd {
  96         unsigned int len;
  97         const struct pci_vpd_ops *ops;
  98         struct bin_attribute *attr; /* descriptor for sysfs VPD entry */
  99 };
 100
 101 int pci_vpd_pci22_init(struct pci_dev *dev);
 102 static inline void pci_vpd_release(struct pci_dev *dev)
 103 {
 104         if (dev->vpd)
 105                 dev->vpd->ops->release(dev);
 106 }
 107
 108 /* PCI /proc functions */
 109 #ifdef CONFIG_PROC_FS
 110 int pci_proc_attach_device(struct pci_dev *dev);
 111 int pci_proc_detach_device(struct pci_dev *dev);
 112 int pci_proc_detach_bus(struct pci_bus *bus);
 113 #else
 114 static inline int pci_proc_attach_device(struct pci_dev *dev) { return 0; }
 115 static inline int pci_proc_detach_device(struct pci_dev *dev) { return 0; }
 116 static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; }
 117 #endif
 118
 119 /* Functions for PCI Hotplug drivers to use */
 120 int pci_hp_add_bridge(struct pci_dev *dev);
 121
 122 #ifdef HAVE_PCI_LEGACY
 123 void pci_create_legacy_files(struct pci_bus *bus);
 124 void pci_remove_legacy_files(struct pci_bus *bus);
 125 #else
 126 static inline void pci_create_legacy_files(struct pci_bus *bus) { return; }
 127 static inline void pci_remove_legacy_files(struct pci_bus *bus) { return; }
 128 #endif
 129
 130 /* Lock for read/write access to pci device and bus lists */
 131 extern struct rw_semaphore pci_bus_sem;
 132
 133 extern raw_spinlock_t pci_lock;
 134
 135 extern unsigned int pci_pm_d3_delay;
 136
 137 #ifdef CONFIG_PCI_MSI
 138 void pci_no_msi(void);
 139 void pci_msi_init_pci_dev(struct pci_dev *dev);
 140 #else
 141 static inline void pci_no_msi(void) { }
 142 static inline void pci_msi_init_pci_dev(struct pci_dev *dev) { }
 143 #endif
 144
 145 void pci_realloc_get_opt(char *);
 146
 147 static inline int pci_no_d1d2(struct pci_dev *dev)
 148 {
 149         unsigned int parent_dstates = 0;
 150
 151         if (dev->bus->self)
 152                 parent_dstates = dev->bus->self->no_d1d2;
 153         return (dev->no_d1d2 || parent_dstates);
 154
 155 }
 156 extern struct device_attribute pci_dev_attrs[];
 157 extern const struct attribute_group *pcibus_groups[];
 158 extern struct device_type pci_dev_type;
 159 extern struct bus_attribute pci_bus_attrs[];
 160
 161
 162 /**
 163  * pci_match_one_device - Tell if a PCI device structure has a matching
 164  *                        PCI device id structure
 165  * @id: single PCI device id structure to match
 166  * @dev: the PCI device structure to match against
 167  *
 168  * Returns the matching pci_device_id structure or %NULL if there is no match.
 169  */
 170 static inline const struct pci_device_id *
 171 pci_match_one_device(const struct pci_device_id *id, const struct pci_dev *dev)
 172 {
 173         if ((id->vendor == PCI_ANY_ID || id->vendor == dev->vendor) &&
 174             (id->device == PCI_ANY_ID || id->device == dev->device) &&
 175             (id->subvendor == PCI_ANY_ID || id->subvendor == dev->subsystem_vendor) &&
 176             (id->subdevice == PCI_ANY_ID || id->subdevice == dev->subsystem_device) &&
 177             !((id->class ^ dev->class) & id->class_mask))
 178                 return id;
 179         return NULL;
 180 }
 181
 182 /* PCI slot sysfs helper code */
 183 #define to_pci_slot(s) container_of(s, struct pci_slot, kobj)
 184
 185 extern struct kset *pci_slots_kset;
 186
 187 struct pci_slot_attribute {
 188         struct attribute attr;
 189         ssize_t (*show)(struct pci_slot *, char *);
 190         ssize_t (*store)(struct pci_slot *, const char *, size_t);
 191 };
 192 #define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr)
 193
 194 enum pci_bar_type {
 195         pci_bar_unknown,        /* Standard PCI BAR probe */
 196         pci_bar_io,             /* An io port BAR */
 197         pci_bar_mem32,          /* A 32-bit memory BAR */
 198         pci_bar_mem64,          /* A 64-bit memory BAR */
 199 };
 200
 201 bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl,
 202                                 int crs_timeout);
 203 int pci_setup_device(struct pci_dev *dev);
 204 int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
 205                     struct resource *res, unsigned int reg);
 206 int pci_resource_bar(struct pci_dev *dev, int resno, enum pci_bar_type *type);
 207 void pci_configure_ari(struct pci_dev *dev);
 208 void __ref __pci_bus_size_bridges(struct pci_bus *bus,
 209                         struct list_head *realloc_head);
 210 void __ref __pci_bus_assign_resources(const struct pci_bus *bus,
 211                                       struct list_head *realloc_head,
 212                                       struct list_head *fail_head);
 213
 214 /**
 215  * pci_ari_enabled - query ARI forwarding status
 216  * @bus: the PCI bus
 217  *
 218  * Returns 1 if ARI forwarding is enabled, or 0 if not enabled;
 219  */
 220 static inline int pci_ari_enabled(struct pci_bus *bus)
 221 {
 222         return bus->self && bus->self->ari_enabled;
 223 }
 224
 225 void pci_reassigndev_resource_alignment(struct pci_dev *dev);
 226 void pci_disable_bridge_window(struct pci_dev *dev);
 227
 228 /* Single Root I/O Virtualization */
 229 struct pci_sriov {
 230         int pos;                /* capability position */
 231         int nres;               /* number of resources */
 232         u32 cap;                /* SR-IOV Capabilities */
 233         u16 ctrl;               /* SR-IOV Control */
 234         u16 total_VFs;          /* total VFs associated with the PF */
 235         u16 initial_VFs;        /* initial VFs associated with the PF */
 236         u16 num_VFs;            /* number of VFs available */
 237         u16 offset;             /* first VF Routing ID offset */
 238         u16 stride;             /* following VF stride */
 239         u32 pgsz;               /* page size for BAR alignment */
 240         u8 link;                /* Function Dependency Link */
 241         u16 driver_max_VFs;     /* max num VFs driver supports */
 242         struct pci_dev *dev;    /* lowest numbered PF */
 243         struct pci_dev *self;   /* this PF */
 244         struct mutex lock;      /* lock for VF bus */
 245         struct work_struct mtask; /* VF Migration task */
 246         u8 __iomem *mstate;     /* VF Migration State Array */
 247 };
 248
 249 #ifdef CONFIG_PCI_ATS
 250 void pci_restore_ats_state(struct pci_dev *dev);
 251 #else
 252 static inline void pci_restore_ats_state(struct pci_dev *dev)
 253 {
 254 }
 255 #endif /* CONFIG_PCI_ATS */
 256
 257 #ifdef CONFIG_PCI_IOV
 258 int pci_iov_init(struct pci_dev *dev);
 259 void pci_iov_release(struct pci_dev *dev);
 260 int pci_iov_resource_bar(struct pci_dev *dev, int resno,
 261                          enum pci_bar_type *type);
 262 resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno);
 263 void pci_restore_iov_state(struct pci_dev *dev);
 264 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 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 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 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 */