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usr
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src
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linux-headers-6.8.0-83-generic
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arch
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x86
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include
/
asm
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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/errno.h> #include <linux/init.h> #include <linux/ioport.h> #include <linux/spinlock.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 #define PCI_USE_E820 0x800000 #define PCI_NO_E820 0x1000000 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 pci_dev; 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[]; } __attribute__((packed)); struct irt_routing_table { u32 signature; /* IRT_SIGNATURE should be here */ u8 size; /* Number of entries provided */ u8 used; /* Number of entries actually used */ u16 exclusive_irqs; /* IRQs devoted exclusively to PCI usage */ struct irq_info slots[]; } __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 */ #ifdef CONFIG_PCI_DIRECT extern int pci_direct_probe(void); extern void pci_direct_init(int type); #else static inline int pci_direct_probe(void) { return -1; } static inline void pci_direct_init(int type) { } #endif #ifdef CONFIG_PCI_BIOS extern void pci_pcbios_init(void); #else static inline void pci_pcbios_init(void) { } #endif extern void __init dmi_check_pciprobe(void); extern void __init dmi_check_skip_isa_align(void); /* some common used subsys_initcalls */ #ifdef CONFIG_PCI extern int __init pci_acpi_init(void); #else static inline int __init pci_acpi_init(void) { return -EINVAL; } #endif 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 pci_mmcfg_region *__init pci_mmconfig_add(int segment, int start, int end, u64 addr); 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 #if defined(CONFIG_PCI) && defined(CONFIG_ACPI) extern bool pci_use_e820; #else #define pci_use_e820 false #endif
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