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 /* Functions internal to the PCI core code */ 8 9 extern int pci_uevent(struct device *dev, struct kobj_uevent_env *env); 10 extern int pci_create_sysfs_dev_files(struct pci_dev *pdev); 11 extern void pci_remove_sysfs_dev_files(struct pci_dev *pdev); 12 extern void pci_cleanup_rom(struct pci_dev *dev); 13 #ifdef HAVE_PCI_MMAP 14 extern int pci_mmap_fits(struct pci_dev *pdev, int resno, 15 struct vm_area_struct *vma); 16 #endif 17 18 /** 19 * struct pci_platform_pm_ops - Firmware PM callbacks 20 * 21 * @is_manageable: returns 'true' if given device is power manageable by the 22 * platform firmware 23 * 24 * @set_state: invokes the platform firmware to set the device's power state 25 * 26 * @choose_state: returns PCI power state of given device preferred by the 27 * platform; to be used during system-wide transitions from a 28 * sleeping state to the working state and vice versa 29 * 30 * @can_wakeup: returns 'true' if given device is capable of waking up the 31 * system from a sleeping state 32 * 33 * @sleep_wake: enables/disables the system wake up capability of given device 34 * 35 * If given platform is generally capable of power managing PCI devices, all of 36 * these callbacks are mandatory. 37 */ 38 struct pci_platform_pm_ops { 39 bool (*is_manageable)(struct pci_dev *dev); 40 int (*set_state)(struct pci_dev *dev, pci_power_t state); 41 pci_power_t (*choose_state)(struct pci_dev *dev); 42 bool (*can_wakeup)(struct pci_dev *dev); 43 int (*sleep_wake)(struct pci_dev *dev, bool enable); 44 }; 45 46 extern int pci_set_platform_pm(struct pci_platform_pm_ops *ops); 47 extern void pci_update_current_state(struct pci_dev *dev, pci_power_t state); 48 extern void pci_disable_enabled_device(struct pci_dev *dev); 49 extern void pci_pm_init(struct pci_dev *dev); 50 extern void platform_pci_wakeup_init(struct pci_dev *dev); 51 extern void pci_allocate_cap_save_buffers(struct pci_dev *dev); 52 extern int pci_restore_standard_config(struct pci_dev *dev); 53 54 static inline bool pci_is_bridge(struct pci_dev *pci_dev) 55 { 56 return !!(pci_dev->subordinate); 57 } 58 59 extern int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val); 60 extern int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val); 61 extern int pci_user_read_config_dword(struct pci_dev *dev, int where, u32 *val); 62 extern int pci_user_write_config_byte(struct pci_dev *dev, int where, u8 val); 63 extern int pci_user_write_config_word(struct pci_dev *dev, int where, u16 val); 64 extern int pci_user_write_config_dword(struct pci_dev *dev, int where, u32 val); 65 66 struct pci_vpd_ops { 67 ssize_t (*read)(struct pci_dev *dev, loff_t pos, size_t count, void *buf); 68 ssize_t (*write)(struct pci_dev *dev, loff_t pos, size_t count, const void *buf); 69 void (*release)(struct pci_dev *dev); 70 }; 71 72 struct pci_vpd { 73 unsigned int len; 74 const struct pci_vpd_ops *ops; 75 struct bin_attribute *attr; /* descriptor for sysfs VPD entry */ 76 }; 77 78 extern int pci_vpd_pci22_init(struct pci_dev *dev); 79 static inline void pci_vpd_release(struct pci_dev *dev) 80 { 81 if (dev->vpd) 82 dev->vpd->ops->release(dev); 83 } 84 85 /* PCI /proc functions */ 86 #ifdef CONFIG_PROC_FS 87 extern int pci_proc_attach_device(struct pci_dev *dev); 88 extern int pci_proc_detach_device(struct pci_dev *dev); 89 extern int pci_proc_detach_bus(struct pci_bus *bus); 90 #else 91 static inline int pci_proc_attach_device(struct pci_dev *dev) { return 0; } 92 static inline int pci_proc_detach_device(struct pci_dev *dev) { return 0; } 93 static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; } 94 #endif 95 96 /* Functions for PCI Hotplug drivers to use */ 97 extern unsigned int pci_do_scan_bus(struct pci_bus *bus); 98 99 #ifdef HAVE_PCI_LEGACY 100 extern void pci_create_legacy_files(struct pci_bus *bus); 101 extern void pci_remove_legacy_files(struct pci_bus *bus); 102 #else 103 static inline void pci_create_legacy_files(struct pci_bus *bus) { return; } 104 static inline void pci_remove_legacy_files(struct pci_bus *bus) { return; } 105 #endif 106 107 /* Lock for read/write access to pci device and bus lists */ 108 extern struct rw_semaphore pci_bus_sem; 109 110 extern unsigned int pci_pm_d3_delay; 111 112 #ifdef CONFIG_PCI_MSI 113 void pci_no_msi(void); 114 extern void pci_msi_init_pci_dev(struct pci_dev *dev); 115 #else 116 static inline void pci_no_msi(void) { } 117 static inline void pci_msi_init_pci_dev(struct pci_dev *dev) { } 118 #endif 119 120 #ifdef CONFIG_PCIEAER 121 void pci_no_aer(void); 122 #else 123 static inline void pci_no_aer(void) { } 124 #endif 125 126 static inline int pci_no_d1d2(struct pci_dev *dev) 127 { 128 unsigned int parent_dstates = 0; 129 130 if (dev->bus->self) 131 parent_dstates = dev->bus->self->no_d1d2; 132 return (dev->no_d1d2 || parent_dstates); 133 134 } 135 extern int pcie_mch_quirk; 136 extern struct device_attribute pci_dev_attrs[]; 137 extern struct device_attribute dev_attr_cpuaffinity; 138 extern struct device_attribute dev_attr_cpulistaffinity; 139 140 /** 141 * pci_match_one_device - Tell if a PCI device structure has a matching 142 * PCI device id structure 143 * @id: single PCI device id structure to match 144 * @dev: the PCI device structure to match against 145 * 146 * Returns the matching pci_device_id structure or %NULL if there is no match. 147 */ 148 static inline const struct pci_device_id * 149 pci_match_one_device(const struct pci_device_id *id, const struct pci_dev *dev) 150 { 151 if ((id->vendor == PCI_ANY_ID || id->vendor == dev->vendor) && 152 (id->device == PCI_ANY_ID || id->device == dev->device) && 153 (id->subvendor == PCI_ANY_ID || id->subvendor == dev->subsystem_vendor) && 154 (id->subdevice == PCI_ANY_ID || id->subdevice == dev->subsystem_device) && 155 !((id->class ^ dev->class) & id->class_mask)) 156 return id; 157 return NULL; 158 } 159 160 struct pci_dev *pci_find_upstream_pcie_bridge(struct pci_dev *pdev); 161 162 /* PCI slot sysfs helper code */ 163 #define to_pci_slot(s) container_of(s, struct pci_slot, kobj) 164 165 extern struct kset *pci_slots_kset; 166 167 struct pci_slot_attribute { 168 struct attribute attr; 169 ssize_t (*show)(struct pci_slot *, char *); 170 ssize_t (*store)(struct pci_slot *, const char *, size_t); 171 }; 172 #define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr) 173 174 enum pci_bar_type { 175 pci_bar_unknown, /* Standard PCI BAR probe */ 176 pci_bar_io, /* An io port BAR */ 177 pci_bar_mem32, /* A 32-bit memory BAR */ 178 pci_bar_mem64, /* A 64-bit memory BAR */ 179 }; 180 181 extern int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type, 182 struct resource *res, unsigned int reg); 183 extern int pci_resource_bar(struct pci_dev *dev, int resno, 184 enum pci_bar_type *type); 185 extern int pci_bus_add_child(struct pci_bus *bus); 186 extern void pci_enable_ari(struct pci_dev *dev); 187 /** 188 * pci_ari_enabled - query ARI forwarding status 189 * @bus: the PCI bus 190 * 191 * Returns 1 if ARI forwarding is enabled, or 0 if not enabled; 192 */ 193 static inline int pci_ari_enabled(struct pci_bus *bus) 194 { 195 return bus->self && bus->self->ari_enabled; 196 } 197 198 #endif /* DRIVERS_PCI_H */ 199