[linux-2.6-block.git] / arch / x86 / pci / pci.h

/*
 *	Low-Level PCI Access for i386 machines.
 *
 *	(c) 1999 Martin Mares <mj@ucw.cz>
 */

#undef DEBUG

#ifdef DEBUG
#define DBG(x...) printk(x)
#else
#define DBG(x...)
#endif

#define PCI_PROBE_BIOS		0x0001
#define PCI_PROBE_CONF1		0x0002
#define PCI_PROBE_CONF2		0x0004
#define PCI_PROBE_MMCONF	0x0008
#define PCI_PROBE_MASK		0x000f
#define PCI_PROBE_NOEARLY	0x0010

#define PCI_NO_CHECKS		0x0400
#define PCI_USE_PIRQ_MASK	0x0800
#define PCI_ASSIGN_ROMS		0x1000
#define PCI_BIOS_IRQ_SCAN	0x2000
#define PCI_ASSIGN_ALL_BUSSES	0x4000
#define PCI_CAN_SKIP_ISA_ALIGN	0x8000
#define PCI_USE__CRS		0x10000
#define PCI_CHECK_ENABLE_AMD_MMCONF	0x20000
#define PCI_HAS_IO_ECS		0x40000
#define PCI_NOASSIGN_ROMS	0x80000

extern unsigned int pci_probe;
extern unsigned long pirq_table_addr;

enum pci_bf_sort_state {
	pci_bf_sort_default,
	pci_force_nobf,
	pci_force_bf,
	pci_dmi_bf,
};

/* pci-i386.c */

extern unsigned int pcibios_max_latency;

void pcibios_resource_survey(void);

/* pci-pc.c */

extern int pcibios_last_bus;
extern struct pci_bus *pci_root_bus;
extern struct pci_ops pci_root_ops;

/* pci-irq.c */

struct irq_info {
	u8 bus, devfn;			/* Bus, device and function */
	struct {
		u8 link;		/* IRQ line ID, chipset dependent, 0=not routed */
		u16 bitmap;		/* Available IRQs */
	} __attribute__((packed)) irq[4];
	u8 slot;			/* Slot number, 0=onboard */
	u8 rfu;
} __attribute__((packed));

struct irq_routing_table {
	u32 signature;			/* PIRQ_SIGNATURE should be here */
	u16 version;			/* PIRQ_VERSION */
	u16 size;			/* Table size in bytes */
	u8 rtr_bus, rtr_devfn;		/* Where the interrupt router lies */
	u16 exclusive_irqs;		/* IRQs devoted exclusively to PCI usage */
	u16 rtr_vendor, rtr_device;	/* Vendor and device ID of interrupt router */
	u32 miniport_data;		/* Crap */
	u8 rfu[11];
	u8 checksum;			/* Modulo 256 checksum must give zero */
	struct irq_info slots[0];
} __attribute__((packed));

extern unsigned int pcibios_irq_mask;

extern int pcibios_scanned;
extern spinlock_t pci_config_lock;

extern int (*pcibios_enable_irq)(struct pci_dev *dev);
extern void (*pcibios_disable_irq)(struct pci_dev *dev);

struct pci_raw_ops {
	int (*read)(unsigned int domain, unsigned int bus, unsigned int devfn,
						int reg, int len, u32 *val);
	int (*write)(unsigned int domain, unsigned int bus, unsigned int devfn,
						int reg, int len, u32 val);
};

extern struct pci_raw_ops *raw_pci_ops;
extern struct pci_raw_ops *raw_pci_ext_ops;

extern struct pci_raw_ops pci_direct_conf1;
extern bool port_cf9_safe;

/* arch_initcall level */
extern int pci_direct_probe(void);
extern void pci_direct_init(int type);
extern void pci_pcbios_init(void);
extern int pci_olpc_init(void);
extern void __init dmi_check_pciprobe(void);
extern void __init dmi_check_skip_isa_align(void);

/* some common used subsys_initcalls */
extern int __init pci_acpi_init(void);
extern int __init pcibios_irq_init(void);
extern int __init pci_visws_init(void);
extern int __init pci_numaq_init(void);
extern int __init pcibios_init(void);

/* pci-mmconfig.c */

extern int __init pci_mmcfg_arch_init(void);
extern void __init pci_mmcfg_arch_free(void);

/*
 * AMD Fam10h CPUs are buggy, and cannot access MMIO config space
 * on their northbrige except through the * %eax register. As such, you MUST
 * NOT use normal IOMEM accesses, you need to only use the magic mmio-config
 * accessor functions.
 * In fact just use pci_config_*, nothing else please.
 */
static inline unsigned char mmio_config_readb(void __iomem *pos)
{
	u8 val;
	asm volatile("movb (%1),%%al" : "=a" (val) : "r" (pos));
	return val;
}

static inline unsigned short mmio_config_readw(void __iomem *pos)
{
	u16 val;
	asm volatile("movw (%1),%%ax" : "=a" (val) : "r" (pos));
	return val;
}

static inline unsigned int mmio_config_readl(void __iomem *pos)
{
	u32 val;
	asm volatile("movl (%1),%%eax" : "=a" (val) : "r" (pos));
	return val;
}

static inline void mmio_config_writeb(void __iomem *pos, u8 val)
{
	asm volatile("movb %%al,(%1)" :: "a" (val), "r" (pos) : "memory");
}

static inline void mmio_config_writew(void __iomem *pos, u16 val)
{
	asm volatile("movw %%ax,(%1)" :: "a" (val), "r" (pos) : "memory");
}

static inline void mmio_config_writel(void __iomem *pos, u32 val)
{
	asm volatile("movl %%eax,(%1)" :: "a" (val), "r" (pos) : "memory");
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Low-Level PCI Access for i386 machines.
	3	*
	4	* (c) 1999 Martin Mares <mj@ucw.cz>
	5	*/
	6
	7	#undef DEBUG
	8
	9	#ifdef DEBUG
	10	#define DBG(x...) printk(x)
	11	#else
	12	#define DBG(x...)
	13	#endif
	14
	15	#define PCI_PROBE_BIOS 0x0001
	16	#define PCI_PROBE_CONF1 0x0002
	17	#define PCI_PROBE_CONF2 0x0004
	18	#define PCI_PROBE_MMCONF 0x0008
79e453d4	19	#define PCI_PROBE_MASK 0x000f
0637a70a	20	#define PCI_PROBE_NOEARLY 0x0010
1da177e4	21
1da177e4 LT	22	#define PCI_NO_CHECKS 0x0400
	23	#define PCI_USE_PIRQ_MASK 0x0800
	24	#define PCI_ASSIGN_ROMS 0x1000
	25	#define PCI_BIOS_IRQ_SCAN 0x2000
	26	#define PCI_ASSIGN_ALL_BUSSES 0x4000
036fff4c	27	#define PCI_CAN_SKIP_ISA_ALIGN 0x8000
62f420f8	28	#define PCI_USE__CRS 0x10000
5f0b2976	29	#define PCI_CHECK_ENABLE_AMD_MMCONF 0x20000
3a27dd1c	30	#define PCI_HAS_IO_ECS 0x40000
dc7c65db	31	#define PCI_NOASSIGN_ROMS 0x80000
1da177e4 LT	32
1da177e4 LT	33	extern unsigned int pci_probe;
120bb424	34	extern unsigned long pirq_table_addr;
1da177e4	35
6b4b78fe MD	36	enum pci_bf_sort_state {
	37	pci_bf_sort_default,
	38	pci_force_nobf,
	39	pci_force_bf,
	40	pci_dmi_bf,
	41	};
	42
1da177e4 LT	43	/* pci-i386.c */
	44
	45	extern unsigned int pcibios_max_latency;
	46
	47	void pcibios_resource_survey(void);
1da177e4 LT	48
	49	/* pci-pc.c */
	50
	51	extern int pcibios_last_bus;
	52	extern struct pci_bus *pci_root_bus;
	53	extern struct pci_ops pci_root_ops;
	54
	55	/* pci-irq.c */
	56
	57	struct irq_info {
	58	u8 bus, devfn; /* Bus, device and function */
	59	struct {
	60	u8 link; /* IRQ line ID, chipset dependent, 0=not routed */
	61	u16 bitmap; /* Available IRQs */
	62	} __attribute__((packed)) irq[4];
	63	u8 slot; /* Slot number, 0=onboard */
	64	u8 rfu;
	65	} __attribute__((packed));
	66
	67	struct irq_routing_table {
	68	u32 signature; /* PIRQ_SIGNATURE should be here */
	69	u16 version; /* PIRQ_VERSION */
	70	u16 size; /* Table size in bytes */
	71	u8 rtr_bus, rtr_devfn; /* Where the interrupt router lies */
	72	u16 exclusive_irqs; /* IRQs devoted exclusively to PCI usage */
	73	u16 rtr_vendor, rtr_device; /* Vendor and device ID of interrupt router */
	74	u32 miniport_data; /* Crap */
	75	u8 rfu[11];
	76	u8 checksum; /* Modulo 256 checksum must give zero */
	77	struct irq_info slots[0];
	78	} __attribute__((packed));
	79
	80	extern unsigned int pcibios_irq_mask;
	81
	82	extern int pcibios_scanned;
	83	extern spinlock_t pci_config_lock;
	84
	85	extern int (pcibios_enable_irq)(struct pci_dev dev);
87bec66b	86	extern void (pcibios_disable_irq)(struct pci_dev dev);
928cf8c6	87
b6ce068a MW	88	struct pci_raw_ops {
	89	int (*read)(unsigned int domain, unsigned int bus, unsigned int devfn,
	90	int reg, int len, u32 *val);
	91	int (*write)(unsigned int domain, unsigned int bus, unsigned int devfn,
	92	int reg, int len, u32 val);
	93	};
	94
	95	extern struct pci_raw_ops *raw_pci_ops;
	96	extern struct pci_raw_ops *raw_pci_ext_ops;
	97
	98	extern struct pci_raw_ops pci_direct_conf1;
14d7ca5c	99	extern bool port_cf9_safe;
928cf8c6	100
8dd779b1	101	/* arch_initcall level */
5e544d61 AK	102	extern int pci_direct_probe(void);
5e544d61 AK	103	extern void pci_direct_init(int type);
92c05fc1	104	extern void pci_pcbios_init(void);
2bdd1b03	105	extern int pci_olpc_init(void);
8dd779b1 RR	106	extern void __init dmi_check_pciprobe(void);
	107	extern void __init dmi_check_skip_isa_align(void);
	108
	109	/* some common used subsys_initcalls */
	110	extern int __init pci_acpi_init(void);
	111	extern int __init pcibios_irq_init(void);
3cabf37f	112	extern int __init pci_visws_init(void);
e27cf3a2	113	extern int __init pci_numaq_init(void);
8dd779b1	114	extern int __init pcibios_init(void);
5e544d61	115
b7867394 OG	116	/* pci-mmconfig.c */
b7867394 OG	117
429d512e	118	extern int __init pci_mmcfg_arch_init(void);
0b64ad71	119	extern void __init pci_mmcfg_arch_free(void);
3320ad99	120
	121	/*
	122	* AMD Fam10h CPUs are buggy, and cannot access MMIO config space
	123	* on their northbrige except through the * %eax register. As such, you MUST
	124	* NOT use normal IOMEM accesses, you need to only use the magic mmio-config
	125	* accessor functions.
	126	* In fact just use pci_config_*, nothing else please.
	127	*/
	128	static inline unsigned char mmio_config_readb(void __iomem *pos)
	129	{
	130	u8 val;
	131	asm volatile("movb (%1),%%al" : "=a" (val) : "r" (pos));
	132	return val;
	133	}
	134
	135	static inline unsigned short mmio_config_readw(void __iomem *pos)
	136	{
	137	u16 val;
	138	asm volatile("movw (%1),%%ax" : "=a" (val) : "r" (pos));
	139	return val;
	140	}
	141
	142	static inline unsigned int mmio_config_readl(void __iomem *pos)
	143	{
	144	u32 val;
	145	asm volatile("movl (%1),%%eax" : "=a" (val) : "r" (pos));
	146	return val;
	147	}
	148
	149	static inline void mmio_config_writeb(void __iomem *pos, u8 val)
	150	{
	151	asm volatile("movb %%al,(%1)" :: "a" (val), "r" (pos) : "memory");
	152	}
	153
	154	static inline void mmio_config_writew(void __iomem *pos, u16 val)
	155	{
	156	asm volatile("movw %%ax,(%1)" :: "a" (val), "r" (pos) : "memory");
	157	}
	158
	159	static inline void mmio_config_writel(void __iomem *pos, u32 val)
	160	{
	161	asm volatile("movl %%eax,(%1)" :: "a" (val), "r" (pos) : "memory");
	162	}