mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-16 20:07:31 +07:00
325ef1857f
This was used by the ide, scsi and networking code in the past to determine if they should bounce payloads. Now that the dma mapping always have to support dma to all physical memory (thanks to swiotlb for non-iommu systems) there is no need to this crude hack any more. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Palmer Dabbelt <palmer@sifive.com> (for riscv) Reviewed-by: Jens Axboe <axboe@kernel.dk>
162 lines
3.5 KiB
C
162 lines
3.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_X86_PCI_H
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#define _ASM_X86_PCI_H
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#include <linux/mm.h> /* for struct page */
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/scatterlist.h>
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#include <asm/io.h>
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#include <asm/pat.h>
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#include <asm/x86_init.h>
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#ifdef __KERNEL__
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struct pci_sysdata {
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int domain; /* PCI domain */
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int node; /* NUMA node */
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#ifdef CONFIG_ACPI
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struct acpi_device *companion; /* ACPI companion device */
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#endif
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#ifdef CONFIG_X86_64
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void *iommu; /* IOMMU private data */
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#endif
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#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
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void *fwnode; /* IRQ domain for MSI assignment */
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#endif
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#if IS_ENABLED(CONFIG_VMD)
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bool vmd_domain; /* True if in Intel VMD domain */
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#endif
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};
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extern int pci_routeirq;
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extern int noioapicquirk;
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extern int noioapicreroute;
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#ifdef CONFIG_PCI
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#ifdef CONFIG_PCI_DOMAINS
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static inline int pci_domain_nr(struct pci_bus *bus)
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{
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struct pci_sysdata *sd = bus->sysdata;
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return sd->domain;
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}
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static inline int pci_proc_domain(struct pci_bus *bus)
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{
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return pci_domain_nr(bus);
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}
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#endif
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#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
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static inline void *_pci_root_bus_fwnode(struct pci_bus *bus)
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{
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struct pci_sysdata *sd = bus->sysdata;
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return sd->fwnode;
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}
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#define pci_root_bus_fwnode _pci_root_bus_fwnode
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#endif
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static inline bool is_vmd(struct pci_bus *bus)
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{
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#if IS_ENABLED(CONFIG_VMD)
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struct pci_sysdata *sd = bus->sysdata;
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return sd->vmd_domain;
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#else
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return false;
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#endif
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}
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/* Can be used to override the logic in pci_scan_bus for skipping
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already-configured bus numbers - to be used for buggy BIOSes
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or architectures with incomplete PCI setup by the loader */
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extern unsigned int pcibios_assign_all_busses(void);
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extern int pci_legacy_init(void);
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#else
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static inline int pcibios_assign_all_busses(void) { return 0; }
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#endif
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extern unsigned long pci_mem_start;
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#define PCIBIOS_MIN_IO 0x1000
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#define PCIBIOS_MIN_MEM (pci_mem_start)
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#define PCIBIOS_MIN_CARDBUS_IO 0x4000
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extern int pcibios_enabled;
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void pcibios_scan_root(int bus);
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struct irq_routing_table *pcibios_get_irq_routing_table(void);
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int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);
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#define HAVE_PCI_MMAP
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#define arch_can_pci_mmap_wc() pat_enabled()
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#define ARCH_GENERIC_PCI_MMAP_RESOURCE
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#ifdef CONFIG_PCI
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extern void early_quirks(void);
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#else
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static inline void early_quirks(void) { }
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#endif
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extern void pci_iommu_alloc(void);
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#ifdef CONFIG_PCI_MSI
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/* implemented in arch/x86/kernel/apic/io_apic. */
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struct msi_desc;
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int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
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void native_teardown_msi_irq(unsigned int irq);
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void native_restore_msi_irqs(struct pci_dev *dev);
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#else
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#define native_setup_msi_irqs NULL
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#define native_teardown_msi_irq NULL
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#endif
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#endif /* __KERNEL__ */
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#ifdef CONFIG_X86_64
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#include <asm/pci_64.h>
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#endif
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/* generic pci stuff */
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#include <asm-generic/pci.h>
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#ifdef CONFIG_NUMA
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/* Returns the node based on pci bus */
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static inline int __pcibus_to_node(const struct pci_bus *bus)
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{
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const struct pci_sysdata *sd = bus->sysdata;
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return sd->node;
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}
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static inline const struct cpumask *
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cpumask_of_pcibus(const struct pci_bus *bus)
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{
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int node;
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node = __pcibus_to_node(bus);
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return (node == -1) ? cpu_online_mask :
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cpumask_of_node(node);
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}
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#endif
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struct pci_setup_rom {
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struct setup_data data;
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uint16_t vendor;
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uint16_t devid;
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uint64_t pcilen;
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unsigned long segment;
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unsigned long bus;
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unsigned long device;
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unsigned long function;
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uint8_t romdata[0];
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};
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#endif /* _ASM_X86_PCI_H */
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