[mirror_ubuntu-jammy-kernel.git] / arch / x86 / include / asm / pci_x86.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 *	Low-Level PCI Access for i386 machines.
 *
 *	(c) 1999 Martin Mares <mj@ucw.cz>
 */

#include <linux/ioport.h>

#undef DEBUG

#ifdef DEBUG
#define DBG(fmt, ...) printk(fmt, ##__VA_ARGS__)
#else
#define DBG(fmt, ...)				\
do {						\
	if (0)					\
		printk(fmt, ##__VA_ARGS__);	\
} while (0)
#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
#define PCI_ROOT_NO_CRS		0x100000
#define PCI_NOASSIGN_BARS	0x200000
#define PCI_BIG_ROOT_WINDOW	0x400000

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 */

void pcibios_resource_survey(void);
void pcibios_set_cache_line_size(void);

/* pci-pc.c */

extern int pcibios_last_bus;
extern struct pci_ops pci_root_ops;

void pcibios_scan_specific_bus(int busn);

/* 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 0 */
	struct irq_info slots[0];
} __attribute__((packed));

extern unsigned int pcibios_irq_mask;

extern raw_spinlock_t pci_config_lock;

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

extern bool mp_should_keep_irq(struct device *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 const struct pci_raw_ops *raw_pci_ops;
extern const struct pci_raw_ops *raw_pci_ext_ops;

extern const struct pci_raw_ops pci_mmcfg;
extern const 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 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 void __init pcibios_irq_init(void);
extern int __init pcibios_init(void);
extern int pci_legacy_init(void);
extern void pcibios_fixup_irqs(void);

/* pci-mmconfig.c */

/* "PCI MMCONFIG %04x [bus %02x-%02x]" */
#define PCI_MMCFG_RESOURCE_NAME_LEN (22 + 4 + 2 + 2)

struct pci_mmcfg_region {
	struct list_head list;
	struct resource res;
	u64 address;
	char __iomem *virt;
	u16 segment;
	u8 start_bus;
	u8 end_bus;
	char name[PCI_MMCFG_RESOURCE_NAME_LEN];
};

extern int __init pci_mmcfg_arch_init(void);
extern void __init pci_mmcfg_arch_free(void);
extern int pci_mmcfg_arch_map(struct pci_mmcfg_region *cfg);
extern void pci_mmcfg_arch_unmap(struct pci_mmcfg_region *cfg);
extern int pci_mmconfig_insert(struct device *dev, u16 seg, u8 start, u8 end,
			       phys_addr_t addr);
extern int pci_mmconfig_delete(u16 seg, u8 start, u8 end);
extern struct pci_mmcfg_region *pci_mmconfig_lookup(int segment, int bus);

extern struct list_head pci_mmcfg_list;

#define PCI_MMCFG_BUS_OFFSET(bus)      ((bus) << 20)

/*
 * On AMD Fam10h CPUs, all PCI MMIO configuration space accesses must use
 * %eax.  No other source or target registers may be used.  The following
 * mmio_config_* accessors enforce this.  See "BIOS and Kernel Developer's
 * Guide (BKDG) For AMD Family 10h Processors", rev. 3.48, sec 2.11.1,
 * "MMIO Configuration Coding Requirements".
 */
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");
}

#ifdef CONFIG_PCI
# ifdef CONFIG_ACPI
#  define x86_default_pci_init		pci_acpi_init
# else
#  define x86_default_pci_init		pci_legacy_init
# endif
# define x86_default_pci_init_irq	pcibios_irq_init
# define x86_default_pci_fixup_irqs	pcibios_fixup_irqs
#else
# define x86_default_pci_init		NULL
# define x86_default_pci_init_irq	NULL
# define x86_default_pci_fixup_irqs	NULL
#endif
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	/*
	3	* Low-Level PCI Access for i386 machines.
	4	*
	5	* (c) 1999 Martin Mares <mj@ucw.cz>
	6	*/
	7
5520b7e7 IM	8	#include <linux/ioport.h>
5520b7e7 IM	9
1da177e4 LT	10	#undef DEBUG
	11
	12	#ifdef DEBUG
c767a54b	13	#define DBG(fmt, ...) printk(fmt, ##__VA_ARGS__)
1da177e4	14	#else
c767a54b JP	15	#define DBG(fmt, ...) \
	16	do { \
	17	if (0) \
	18	printk(fmt, ##__VA_ARGS__); \
	19	} while (0)
1da177e4 LT	20	#endif
	21
	22	#define PCI_PROBE_BIOS 0x0001
	23	#define PCI_PROBE_CONF1 0x0002
	24	#define PCI_PROBE_CONF2 0x0004
	25	#define PCI_PROBE_MMCONF 0x0008
79e453d4	26	#define PCI_PROBE_MASK 0x000f
0637a70a	27	#define PCI_PROBE_NOEARLY 0x0010
1da177e4	28
1da177e4 LT	29	#define PCI_NO_CHECKS 0x0400
	30	#define PCI_USE_PIRQ_MASK 0x0800
	31	#define PCI_ASSIGN_ROMS 0x1000
	32	#define PCI_BIOS_IRQ_SCAN 0x2000
	33	#define PCI_ASSIGN_ALL_BUSSES 0x4000
036fff4c	34	#define PCI_CAN_SKIP_ISA_ALIGN 0x8000
236e946b	35	#define PCI_USE__CRS 0x10000
5f0b2976	36	#define PCI_CHECK_ENABLE_AMD_MMCONF 0x20000
3a27dd1c	37	#define PCI_HAS_IO_ECS 0x40000
dc7c65db	38	#define PCI_NOASSIGN_ROMS 0x80000
7bc5e3f2	39	#define PCI_ROOT_NO_CRS 0x100000
7bd1c365	40	#define PCI_NOASSIGN_BARS 0x200000
f32ab754	41	#define PCI_BIG_ROOT_WINDOW 0x400000
1da177e4 LT	42
1da177e4 LT	43	extern unsigned int pci_probe;
120bb424	44	extern unsigned long pirq_table_addr;
1da177e4	45
6b4b78fe MD	46	enum pci_bf_sort_state {
	47	pci_bf_sort_default,
	48	pci_force_nobf,
	49	pci_force_bf,
	50	pci_dmi_bf,
	51	};
	52
1da177e4 LT	53	/* pci-i386.c */
1da177e4 LT	54
1da177e4	55	void pcibios_resource_survey(void);
44de3395	56	void pcibios_set_cache_line_size(void);
1da177e4 LT	57
	58	/* pci-pc.c */
	59
	60	extern int pcibios_last_bus;
1da177e4 LT	61	extern struct pci_ops pci_root_ops;
1da177e4 LT	62
5707b24a AR	63	void pcibios_scan_specific_bus(int busn);
5707b24a AR	64
1da177e4 LT	65	/* pci-irq.c */
	66
	67	struct irq_info {
	68	u8 bus, devfn; /* Bus, device and function */
	69	struct {
82487711 JSR	70	u8 link; /* IRQ line ID, chipset dependent,
82487711 JSR	71	0 = not routed */
1da177e4 LT	72	u16 bitmap; /* Available IRQs */
	73	} __attribute__((packed)) irq[4];
	74	u8 slot; /* Slot number, 0=onboard */
	75	u8 rfu;
	76	} __attribute__((packed));
	77
	78	struct irq_routing_table {
	79	u32 signature; /* PIRQ_SIGNATURE should be here */
	80	u16 version; /* PIRQ_VERSION */
	81	u16 size; /* Table size in bytes */
	82	u8 rtr_bus, rtr_devfn; /* Where the interrupt router lies */
82487711 JSR	83	u16 exclusive_irqs; /* IRQs devoted exclusively to
	84	PCI usage */
	85	u16 rtr_vendor, rtr_device; /* Vendor and device ID of
	86	interrupt router */
1da177e4 LT	87	u32 miniport_data; /* Crap */
1da177e4 LT	88	u8 rfu[11];
82487711	89	u8 checksum; /* Modulo 256 checksum must give 0 */
1da177e4 LT	90	struct irq_info slots[0];
	91	} __attribute__((packed));
	92
	93	extern unsigned int pcibios_irq_mask;
	94
d19f61f0	95	extern raw_spinlock_t pci_config_lock;
1da177e4 LT	96
1da177e4 LT	97	extern int (pcibios_enable_irq)(struct pci_dev dev);
87bec66b	98	extern void (pcibios_disable_irq)(struct pci_dev dev);
928cf8c6	99
6c777e87 BH	100	extern bool mp_should_keep_irq(struct device *dev);
6c777e87 BH	101
b6ce068a MW	102	struct pci_raw_ops {
	103	int (*read)(unsigned int domain, unsigned int bus, unsigned int devfn,
	104	int reg, int len, u32 *val);
	105	int (*write)(unsigned int domain, unsigned int bus, unsigned int devfn,
	106	int reg, int len, u32 val);
	107	};
	108
72da0b07 JB	109	extern const struct pci_raw_ops *raw_pci_ops;
72da0b07 JB	110	extern const struct pci_raw_ops *raw_pci_ext_ops;
b6ce068a	111
c0fa4078	112	extern const struct pci_raw_ops pci_mmcfg;
72da0b07	113	extern const struct pci_raw_ops pci_direct_conf1;
14d7ca5c	114	extern bool port_cf9_safe;
928cf8c6	115
8dd779b1	116	/* arch_initcall level */
5e544d61 AK	117	extern int pci_direct_probe(void);
5e544d61 AK	118	extern void pci_direct_init(int type);
92c05fc1	119	extern void pci_pcbios_init(void);
8dd779b1 RR	120	extern void __init dmi_check_pciprobe(void);
	121	extern void __init dmi_check_skip_isa_align(void);
	122
	123	/* some common used subsys_initcalls */
	124	extern int __init pci_acpi_init(void);
ab3b3793	125	extern void __init pcibios_irq_init(void);
8dd779b1	126	extern int __init pcibios_init(void);
b72d0db9	127	extern int pci_legacy_init(void);
9325a28c	128	extern void pcibios_fixup_irqs(void);
5e544d61	129
b7867394 OG	130	/* pci-mmconfig.c */
b7867394 OG	131
56ddf4d3 BH	132	/* "PCI MMCONFIG %04x [bus %02x-%02x]" */
	133	#define PCI_MMCFG_RESOURCE_NAME_LEN (22 + 4 + 2 + 2)
	134
d215a9c8	135	struct pci_mmcfg_region {
ff097ddd	136	struct list_head list;
56ddf4d3	137	struct resource res;
d215a9c8	138	u64 address;
3f0f5503	139	char __iomem *virt;
d7e6b66f BH	140	u16 segment;
	141	u8 start_bus;
	142	u8 end_bus;
56ddf4d3	143	char name[PCI_MMCFG_RESOURCE_NAME_LEN];
d215a9c8 BH	144	};
d215a9c8 BH	145
429d512e	146	extern int __init pci_mmcfg_arch_init(void);
0b64ad71	147	extern void __init pci_mmcfg_arch_free(void);
a18e3690	148	extern int pci_mmcfg_arch_map(struct pci_mmcfg_region *cfg);
9cf0105d	149	extern void pci_mmcfg_arch_unmap(struct pci_mmcfg_region *cfg);
a18e3690 GKH	150	extern int pci_mmconfig_insert(struct device *dev, u16 seg, u8 start, u8 end,
a18e3690 GKH	151	phys_addr_t addr);
9c95111b	152	extern int pci_mmconfig_delete(u16 seg, u8 start, u8 end);
f6e1d8cc	153	extern struct pci_mmcfg_region *pci_mmconfig_lookup(int segment, int bus);
3320ad99	154
ff097ddd	155	extern struct list_head pci_mmcfg_list;
c4bf2f37	156
df5eb1d6 BH	157	#define PCI_MMCFG_BUS_OFFSET(bus) ((bus) << 20)
df5eb1d6 BH	158
3320ad99	159	/*
21461775 TN	160	* On AMD Fam10h CPUs, all PCI MMIO configuration space accesses must use
	161	* %eax. No other source or target registers may be used. The following
	162	* mmio_config_* accessors enforce this. See "BIOS and Kernel Developer's
	163	* Guide (BKDG) For AMD Family 10h Processors", rev. 3.48, sec 2.11.1,
	164	* "MMIO Configuration Coding Requirements".
3320ad99	165	*/
	166	static inline unsigned char mmio_config_readb(void __iomem *pos)
	167	{
	168	u8 val;
	169	asm volatile("movb (%1),%%al" : "=a" (val) : "r" (pos));
	170	return val;
	171	}
	172
	173	static inline unsigned short mmio_config_readw(void __iomem *pos)
	174	{
	175	u16 val;
	176	asm volatile("movw (%1),%%ax" : "=a" (val) : "r" (pos));
	177	return val;
	178	}
	179
	180	static inline unsigned int mmio_config_readl(void __iomem *pos)
	181	{
	182	u32 val;
	183	asm volatile("movl (%1),%%eax" : "=a" (val) : "r" (pos));
	184	return val;
	185	}
	186
	187	static inline void mmio_config_writeb(void __iomem *pos, u8 val)
	188	{
82487711	189	asm volatile("movb %%al,(%1)" : : "a" (val), "r" (pos) : "memory");
3320ad99	190	}
	191
	192	static inline void mmio_config_writew(void __iomem *pos, u16 val)
	193	{
82487711	194	asm volatile("movw %%ax,(%1)" : : "a" (val), "r" (pos) : "memory");
3320ad99	195	}
	196
	197	static inline void mmio_config_writel(void __iomem *pos, u32 val)
	198	{
82487711	199	asm volatile("movl %%eax,(%1)" : : "a" (val), "r" (pos) : "memory");
3320ad99	200	}
b72d0db9 TG	201
	202	#ifdef CONFIG_PCI
	203	# ifdef CONFIG_ACPI
	204	# define x86_default_pci_init pci_acpi_init
	205	# else
	206	# define x86_default_pci_init pci_legacy_init
	207	# endif
ab3b3793	208	# define x86_default_pci_init_irq pcibios_irq_init
9325a28c	209	# define x86_default_pci_fixup_irqs pcibios_fixup_irqs
b72d0db9 TG	210	#else
b72d0db9 TG	211	# define x86_default_pci_init NULL
ab3b3793	212	# define x86_default_pci_init_irq NULL
9325a28c	213	# define x86_default_pci_fixup_irqs NULL
b72d0db9	214	#endif