pci.h

xen 3.2.2 源码

/* drivers/pci/bus.c */
int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
			struct resource *res, resource_size_t size,
			resource_size_t align, resource_size_t min,
			unsigned int type_mask,
			void (*alignf)(void *, struct resource *,
				resource_size_t, resource_size_t),
			void *alignf_data);
void pci_enable_bridges(struct pci_bus *bus);

/* Proper probing supporting hot-pluggable devices */
int __must_check __pci_register_driver(struct pci_driver *, struct module *);
static inline int __must_check pci_register_driver(struct pci_driver *driver)
{
	return __pci_register_driver(driver, THIS_MODULE);
}

void pci_unregister_driver(struct pci_driver *);
void pci_remove_behind_bridge(struct pci_dev *);
struct pci_driver *pci_dev_driver(const struct pci_dev *);
const struct pci_device_id *pci_match_device(struct pci_driver *drv, struct pci_dev *dev);
const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, struct pci_dev *dev);
int pci_scan_bridge(struct pci_bus *bus, struct pci_dev * dev, int max, int pass);

void pci_walk_bus(struct pci_bus *top, void (*cb)(struct pci_dev *, void *),
		  void *userdata);
int pci_cfg_space_size(struct pci_dev *dev);
unsigned char pci_bus_max_busnr(struct pci_bus* bus);

/* kmem_cache style wrapper around pci_alloc_consistent() */

#include <linux/dmapool.h>

#define	pci_pool dma_pool
#define pci_pool_create(name, pdev, size, align, allocation) \
		dma_pool_create(name, &pdev->dev, size, align, allocation)
#define	pci_pool_destroy(pool) dma_pool_destroy(pool)
#define	pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
#define	pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)

enum pci_dma_burst_strategy {
	PCI_DMA_BURST_INFINITY,	/* make bursts as large as possible,
				   strategy_parameter is N/A */
	PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter
				   byte boundaries */
	PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of
				   strategy_parameter byte boundaries */
};

#if defined(CONFIG_ISA) || defined(CONFIG_EISA)
extern struct pci_dev *isa_bridge;
#endif

struct msix_entry {
	u16 	vector;	/* kernel uses to write allocated vector */
	u16	entry;	/* driver uses to specify entry, OS writes */
};


#ifndef CONFIG_PCI_MSI
static inline void pci_scan_msi_device(struct pci_dev *dev) {}
static inline int pci_enable_msi(struct pci_dev *dev) {return -1;}
static inline void pci_disable_msi(struct pci_dev *dev) {}
static inline int pci_enable_msix(struct pci_dev* dev,
	struct msix_entry *entries, int nvec) {return -1;}
static inline void pci_disable_msix(struct pci_dev *dev) {}
static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev) {}
#else
extern void pci_scan_msi_device(struct pci_dev *dev);
extern int pci_enable_msi(struct pci_dev *dev);
extern void pci_disable_msi(struct pci_dev *dev);
extern int pci_enable_msix(struct pci_dev* dev,
	struct msix_entry *entries, int nvec);
extern void pci_disable_msix(struct pci_dev *dev);
extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
#endif

#ifdef CONFIG_HT_IRQ
/* The functions a driver should call */
int  ht_create_irq(struct pci_dev *dev, int idx);
void ht_destroy_irq(unsigned int irq);
#endif /* CONFIG_HT_IRQ */

extern void pci_block_user_cfg_access(struct pci_dev *dev);
extern void pci_unblock_user_cfg_access(struct pci_dev *dev);

/*
 * PCI domain support.  Sometimes called PCI segment (eg by ACPI),
 * a PCI domain is defined to be a set of PCI busses which share
 * configuration space.
 */
#ifndef CONFIG_PCI_DOMAINS
static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
static inline int pci_proc_domain(struct pci_bus *bus)
{
	return 0;
}
#endif

#else /* CONFIG_PCI is not enabled */

/*
 *  If the system does not have PCI, clearly these return errors.  Define
 *  these as simple inline functions to avoid hair in drivers.
 */

#define _PCI_NOP(o,s,t) \
	static inline int pci_##o##_config_##s (struct pci_dev *dev, int where, t val) \
		{ return PCIBIOS_FUNC_NOT_SUPPORTED; }
#define _PCI_NOP_ALL(o,x)	_PCI_NOP(o,byte,u8 x) \
				_PCI_NOP(o,word,u16 x) \
				_PCI_NOP(o,dword,u32 x)
_PCI_NOP_ALL(read, *)
_PCI_NOP_ALL(write,)

static inline struct pci_dev *pci_find_device(unsigned int vendor, unsigned int device, const struct pci_dev *from)
{ return NULL; }

static inline struct pci_dev *pci_find_slot(unsigned int bus, unsigned int devfn)
{ return NULL; }

static inline struct pci_dev *pci_get_device(unsigned int vendor,
				unsigned int device, struct pci_dev *from)
{ return NULL; }

static inline struct pci_dev *pci_get_device_reverse(unsigned int vendor,
				unsigned int device, struct pci_dev *from)
{ return NULL; }

static inline struct pci_dev *pci_get_subsys (unsigned int vendor, unsigned int device,
unsigned int ss_vendor, unsigned int ss_device, struct pci_dev *from)
{ return NULL; }

static inline struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from)
{ return NULL; }

#define pci_dev_present(ids)	(0)
#define pci_dev_put(dev)	do { } while (0)

static inline void pci_set_master(struct pci_dev *dev) { }
static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; }
static inline void pci_disable_device(struct pci_dev *dev) { }
static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask) { return -EIO; }
static inline int pci_assign_resource(struct pci_dev *dev, int i) { return -EBUSY;}
static inline int __pci_register_driver(struct pci_driver *drv, struct module *owner) { return 0;}
static inline int pci_register_driver(struct pci_driver *drv) { return 0;}
static inline void pci_unregister_driver(struct pci_driver *drv) { }
static inline int pci_find_capability (struct pci_dev *dev, int cap) {return 0; }
static inline int pci_find_next_capability (struct pci_dev *dev, u8 post, int cap) { return 0; }
static inline int pci_find_ext_capability (struct pci_dev *dev, int cap) {return 0; }
static inline const struct pci_device_id *pci_match_device(const struct pci_device_id *ids, const struct pci_dev *dev) { return NULL; }

/* Power management related routines */
static inline int pci_save_state(struct pci_dev *dev) { return 0; }
static inline int pci_restore_state(struct pci_dev *dev) { return 0; }
static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state) { return 0; }
static inline pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state) { return PCI_D0; }
static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable) { return 0; }

#define	isa_bridge	((struct pci_dev *)NULL)

#define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)

static inline void pci_block_user_cfg_access(struct pci_dev *dev) { }
static inline void pci_unblock_user_cfg_access(struct pci_dev *dev) { }

#endif /* CONFIG_PCI */

/* Include architecture-dependent settings and functions */

#include <asm/pci.h>

/* these helpers provide future and backwards compatibility
 * for accessing popular PCI BAR info */
#define pci_resource_start(dev,bar)   ((dev)->resource[(bar)].start)
#define pci_resource_end(dev,bar)     ((dev)->resource[(bar)].end)
#define pci_resource_flags(dev,bar)   ((dev)->resource[(bar)].flags)
#define pci_resource_len(dev,bar) \
	((pci_resource_start((dev),(bar)) == 0 &&	\
	  pci_resource_end((dev),(bar)) ==		\
	  pci_resource_start((dev),(bar))) ? 0 :	\
	  						\
	 (pci_resource_end((dev),(bar)) -		\
	  pci_resource_start((dev),(bar)) + 1))

/* Similar to the helpers above, these manipulate per-pci_dev
 * driver-specific data.  They are really just a wrapper around
 * the generic device structure functions of these calls.
 */
static inline void *pci_get_drvdata (struct pci_dev *pdev)
{
	return dev_get_drvdata(&pdev->dev);
}

static inline void pci_set_drvdata (struct pci_dev *pdev, void *data)
{
	dev_set_drvdata(&pdev->dev, data);
}

/* If you want to know what to call your pci_dev, ask this function.
 * Again, it's a wrapper around the generic device.
 */
static inline char *pci_name(struct pci_dev *pdev)
{
	return pdev->dev.bus_id;
}


/* Some archs don't want to expose struct resource to userland as-is
 * in sysfs and /proc
 */
#ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER
static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
                const struct resource *rsrc, resource_size_t *start,
		resource_size_t *end)
{
	*start = rsrc->start;
	*end = rsrc->end;
}
#endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */


/*
 *  The world is not perfect and supplies us with broken PCI devices.
 *  For at least a part of these bugs we need a work-around, so both
 *  generic (drivers/pci/quirks.c) and per-architecture code can define
 *  fixup hooks to be called for particular buggy devices.
 */

struct pci_fixup {
	u16 vendor, device;	/* You can use PCI_ANY_ID here of course */
	void (*hook)(struct pci_dev *dev);
};

enum pci_fixup_pass {
	pci_fixup_early,	/* Before probing BARs */
	pci_fixup_header,	/* After reading configuration header */
	pci_fixup_final,	/* Final phase of device fixups */
	pci_fixup_enable,	/* pci_enable_device() time */
};

/* Anonymous variables would be nice... */
#define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, hook)	\
	static const struct pci_fixup __pci_fixup_##name __attribute_used__ \
	__attribute__((__section__(#section))) = { vendor, device, hook };
#define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook)			\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early,			\
			vendor##device##hook, vendor, device, hook)
#define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook)			\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header,			\
			vendor##device##hook, vendor, device, hook)
#define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook)			\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final,			\
			vendor##device##hook, vendor, device, hook)
#define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook)			\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable,			\
			vendor##device##hook, vendor, device, hook)


void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);

extern int pci_pci_problems;
#define PCIPCI_FAIL		1	/* No PCI PCI DMA */
#define PCIPCI_TRITON		2
#define PCIPCI_NATOMA		4
#define PCIPCI_VIAETBF		8
#define PCIPCI_VSFX		16
#define PCIPCI_ALIMAGIK		32	/* Need low latency setting */
#define PCIAGP_FAIL		64	/* No PCI to AGP DMA */

#endif /* __KERNEL__ */
#endif /* LINUX_PCI_H */