diff options
Diffstat (limited to 'arch/x86/include/asm/pci.h')
| -rw-r--r-- | arch/x86/include/asm/pci.h | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/arch/x86/include/asm/pci.h b/arch/x86/include/asm/pci.h new file mode 100644 index 000000000..662963681 --- /dev/null +++ b/arch/x86/include/asm/pci.h @@ -0,0 +1,161 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_X86_PCI_H +#define _ASM_X86_PCI_H + +#include <linux/mm.h> /* for struct page */ +#include <linux/types.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/scatterlist.h> +#include <asm/io.h> +#include <asm/pat.h> +#include <asm/x86_init.h> + +#ifdef __KERNEL__ + +struct pci_sysdata { + int domain; /* PCI domain */ + int node; /* NUMA node */ +#ifdef CONFIG_ACPI + struct acpi_device *companion; /* ACPI companion device */ +#endif +#ifdef CONFIG_X86_64 + void *iommu; /* IOMMU private data */ +#endif +#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN + void *fwnode; /* IRQ domain for MSI assignment */ +#endif +#if IS_ENABLED(CONFIG_VMD) + bool vmd_domain; /* True if in Intel VMD domain */ +#endif +}; + +extern int pci_routeirq; +extern int noioapicquirk; +extern int noioapicreroute; + +#ifdef CONFIG_PCI + +#ifdef CONFIG_PCI_DOMAINS +static inline int pci_domain_nr(struct pci_bus *bus) +{ + struct pci_sysdata *sd = bus->sysdata; + + return sd->domain; +} + +static inline int pci_proc_domain(struct pci_bus *bus) +{ + return pci_domain_nr(bus); +} +#endif + +#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN +static inline void *_pci_root_bus_fwnode(struct pci_bus *bus) +{ + struct pci_sysdata *sd = bus->sysdata; + + return sd->fwnode; +} + +#define pci_root_bus_fwnode _pci_root_bus_fwnode +#endif + +static inline bool is_vmd(struct pci_bus *bus) +{ +#if IS_ENABLED(CONFIG_VMD) + struct pci_sysdata *sd = bus->sysdata; + + return sd->vmd_domain; +#else + return false; +#endif +} + +/* Can be used to override the logic in pci_scan_bus for skipping + already-configured bus numbers - to be used for buggy BIOSes + or architectures with incomplete PCI setup by the loader */ + +extern unsigned int pcibios_assign_all_busses(void); +extern int pci_legacy_init(void); +#else +static inline int pcibios_assign_all_busses(void) { return 0; } +#endif + +extern unsigned long pci_mem_start; +#define PCIBIOS_MIN_IO 0x1000 +#define PCIBIOS_MIN_MEM (pci_mem_start) + +#define PCIBIOS_MIN_CARDBUS_IO 0x4000 + +extern int pcibios_enabled; +void pcibios_scan_root(int bus); + +struct irq_routing_table *pcibios_get_irq_routing_table(void); +int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq); + + +#define HAVE_PCI_MMAP +#define arch_can_pci_mmap_wc() pat_enabled() +#define ARCH_GENERIC_PCI_MMAP_RESOURCE + +#ifdef CONFIG_PCI +extern void early_quirks(void); +#else +static inline void early_quirks(void) { } +#endif + +extern void pci_iommu_alloc(void); + +#ifdef CONFIG_PCI_MSI +/* implemented in arch/x86/kernel/apic/io_apic. */ +struct msi_desc; +int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type); +void native_teardown_msi_irq(unsigned int irq); +void native_restore_msi_irqs(struct pci_dev *dev); +#else +#define native_setup_msi_irqs NULL +#define native_teardown_msi_irq NULL +#endif +#endif /* __KERNEL__ */ + +#ifdef CONFIG_X86_64 +#include <asm/pci_64.h> +#endif + +/* generic pci stuff */ +#include <asm-generic/pci.h> + +#ifdef CONFIG_NUMA +/* Returns the node based on pci bus */ +static inline int __pcibus_to_node(const struct pci_bus *bus) +{ + const struct pci_sysdata *sd = bus->sysdata; + + return sd->node; +} + +static inline const struct cpumask * +cpumask_of_pcibus(const struct pci_bus *bus) +{ + int node; + + node = __pcibus_to_node(bus); + return (node == -1) ? cpu_online_mask : + cpumask_of_node(node); +} +#endif + +struct pci_setup_rom { + struct setup_data data; + uint16_t vendor; + uint16_t devid; + uint64_t pcilen; + unsigned long segment; + unsigned long bus; + unsigned long device; + unsigned long function; + uint8_t romdata[0]; +}; + +#endif /* _ASM_X86_PCI_H */ |