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32 results

page_alloc.c

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  • pci.h 6.66 KiB
    #ifndef DRIVERS_PCI_H
    #define DRIVERS_PCI_H
    
    #define PCI_CFG_SPACE_SIZE	256
    #define PCI_CFG_SPACE_EXP_SIZE	4096
    
    /* Functions internal to the PCI core code */
    
    extern int pci_uevent(struct device *dev, struct kobj_uevent_env *env);
    extern int pci_create_sysfs_dev_files(struct pci_dev *pdev);
    extern void pci_remove_sysfs_dev_files(struct pci_dev *pdev);
    extern void pci_cleanup_rom(struct pci_dev *dev);
    #ifdef HAVE_PCI_MMAP
    extern int pci_mmap_fits(struct pci_dev *pdev, int resno,
    			 struct vm_area_struct *vma);
    #endif
    
    /**
     * struct pci_platform_pm_ops - Firmware PM callbacks
     *
     * @is_manageable: returns 'true' if given device is power manageable by the
     *                 platform firmware
     *
     * @set_state: invokes the platform firmware to set the device's power state
     *
     * @choose_state: returns PCI power state of given device preferred by the
     *                platform; to be used during system-wide transitions from a
     *                sleeping state to the working state and vice versa
     *
     * @can_wakeup: returns 'true' if given device is capable of waking up the
     *              system from a sleeping state
     *
     * @sleep_wake: enables/disables the system wake up capability of given device
     *
     * If given platform is generally capable of power managing PCI devices, all of
     * these callbacks are mandatory.
     */
    struct pci_platform_pm_ops {
    	bool (*is_manageable)(struct pci_dev *dev);
    	int (*set_state)(struct pci_dev *dev, pci_power_t state);
    	pci_power_t (*choose_state)(struct pci_dev *dev);
    	bool (*can_wakeup)(struct pci_dev *dev);
    	int (*sleep_wake)(struct pci_dev *dev, bool enable);
    };
    
    extern int pci_set_platform_pm(struct pci_platform_pm_ops *ops);
    extern void pci_update_current_state(struct pci_dev *dev, pci_power_t state);
    extern void pci_disable_enabled_device(struct pci_dev *dev);
    extern void pci_pm_init(struct pci_dev *dev);
    extern void platform_pci_wakeup_init(struct pci_dev *dev);
    extern void pci_allocate_cap_save_buffers(struct pci_dev *dev);
    
    static inline bool pci_is_bridge(struct pci_dev *pci_dev)
    {
    	return !!(pci_dev->subordinate);
    }
    
    extern int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val);
    extern int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val);
    extern int pci_user_read_config_dword(struct pci_dev *dev, int where, u32 *val);
    extern int pci_user_write_config_byte(struct pci_dev *dev, int where, u8 val);
    extern int pci_user_write_config_word(struct pci_dev *dev, int where, u16 val);
    extern int pci_user_write_config_dword(struct pci_dev *dev, int where, u32 val);
    
    struct pci_vpd_ops {
    	ssize_t (*read)(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
    	ssize_t (*write)(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
    	void (*release)(struct pci_dev *dev);
    };
    
    struct pci_vpd {
    	unsigned int len;
    	const struct pci_vpd_ops *ops;
    	struct bin_attribute *attr; /* descriptor for sysfs VPD entry */
    };
    
    extern int pci_vpd_pci22_init(struct pci_dev *dev);
    static inline void pci_vpd_release(struct pci_dev *dev)
    {
    	if (dev->vpd)
    		dev->vpd->ops->release(dev);
    }
    
    /* PCI /proc functions */
    #ifdef CONFIG_PROC_FS
    extern int pci_proc_attach_device(struct pci_dev *dev);
    extern int pci_proc_detach_device(struct pci_dev *dev);
    extern int pci_proc_detach_bus(struct pci_bus *bus);
    #else
    static inline int pci_proc_attach_device(struct pci_dev *dev) { return 0; }
    static inline int pci_proc_detach_device(struct pci_dev *dev) { return 0; }
    static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; }
    #endif
    
    /* Functions for PCI Hotplug drivers to use */
    extern unsigned int pci_do_scan_bus(struct pci_bus *bus);
    
    #ifdef HAVE_PCI_LEGACY
    extern void pci_create_legacy_files(struct pci_bus *bus);
    extern void pci_remove_legacy_files(struct pci_bus *bus);
    #else
    static inline void pci_create_legacy_files(struct pci_bus *bus) { return; }
    static inline void pci_remove_legacy_files(struct pci_bus *bus) { return; }
    #endif
    
    /* Lock for read/write access to pci device and bus lists */
    extern struct rw_semaphore pci_bus_sem;
    
    extern unsigned int pci_pm_d3_delay;
    
    #ifdef CONFIG_PCI_MSI
    void pci_no_msi(void);
    extern void pci_msi_init_pci_dev(struct pci_dev *dev);
    #else
    static inline void pci_no_msi(void) { }
    static inline void pci_msi_init_pci_dev(struct pci_dev *dev) { }
    #endif
    
    #ifdef CONFIG_PCIEAER
    void pci_no_aer(void);
    #else
    static inline void pci_no_aer(void) { }
    #endif
    
    static inline int pci_no_d1d2(struct pci_dev *dev)
    {
    	unsigned int parent_dstates = 0;
    
    	if (dev->bus->self)
    		parent_dstates = dev->bus->self->no_d1d2;
    	return (dev->no_d1d2 || parent_dstates);
    
    }
    extern int pcie_mch_quirk;
    extern struct device_attribute pci_dev_attrs[];
    extern struct device_attribute dev_attr_cpuaffinity;
    extern struct device_attribute dev_attr_cpulistaffinity;
    
    /**
     * pci_match_one_device - Tell if a PCI device structure has a matching
     *                        PCI device id structure
     * @id: single PCI device id structure to match
     * @dev: the PCI device structure to match against
     *
     * Returns the matching pci_device_id structure or %NULL if there is no match.
     */
    static inline const struct pci_device_id *
    pci_match_one_device(const struct pci_device_id *id, const struct pci_dev *dev)
    {
    	if ((id->vendor == PCI_ANY_ID || id->vendor == dev->vendor) &&
    	    (id->device == PCI_ANY_ID || id->device == dev->device) &&
    	    (id->subvendor == PCI_ANY_ID || id->subvendor == dev->subsystem_vendor) &&
    	    (id->subdevice == PCI_ANY_ID || id->subdevice == dev->subsystem_device) &&
    	    !((id->class ^ dev->class) & id->class_mask))
    		return id;
    	return NULL;
    }
    
    struct pci_dev *pci_find_upstream_pcie_bridge(struct pci_dev *pdev);
    
    /* PCI slot sysfs helper code */
    #define to_pci_slot(s) container_of(s, struct pci_slot, kobj)
    
    extern struct kset *pci_slots_kset;
    
    struct pci_slot_attribute {
    	struct attribute attr;
    	ssize_t (*show)(struct pci_slot *, char *);
    	ssize_t (*store)(struct pci_slot *, const char *, size_t);
    };
    #define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr)
    
    enum pci_bar_type {
    	pci_bar_unknown,	/* Standard PCI BAR probe */
    	pci_bar_io,		/* An io port BAR */
    	pci_bar_mem32,		/* A 32-bit memory BAR */
    	pci_bar_mem64,		/* A 64-bit memory BAR */
    };
    
    extern int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
    				struct resource *res, unsigned int reg);
    extern int pci_resource_bar(struct pci_dev *dev, int resno,
    			    enum pci_bar_type *type);
    extern int pci_bus_add_child(struct pci_bus *bus);
    extern void pci_enable_ari(struct pci_dev *dev);
    /**
     * pci_ari_enabled - query ARI forwarding status
     * @bus: the PCI bus
     *
     * Returns 1 if ARI forwarding is enabled, or 0 if not enabled;
     */
    static inline int pci_ari_enabled(struct pci_bus *bus)
    {
    	return bus->self && bus->self->ari_enabled;
    }
    
    #endif /* DRIVERS_PCI_H */