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2c681e6b37
Now that interrupt remapping sets the irqdomain pointer when a PCI device is added it's possible to store the default irq domain in the device struct in pcibios_add_device(). If the bus to which a device is connected has an irq domain associated then this domain is used otherwise the default domain (PCI/MSI native or XEN PCI/MSI) is used. Using the bus domain ensures that special MSI bus domains like VMD work. This makes XEN and the non-remapped native case work solely based on the irq domain pointer in struct device for PCI/MSI and allows to remove the arch fallback and make most of the x86_msi ops private to XEN in the next steps. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20200826112333.900423047@linutronix.de
63 lines
1.8 KiB
C
63 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_IRQDOMAIN_H
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#define _ASM_IRQDOMAIN_H
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#include <linux/irqdomain.h>
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#include <asm/hw_irq.h>
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#ifdef CONFIG_X86_LOCAL_APIC
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enum {
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/* Allocate contiguous CPU vectors */
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X86_IRQ_ALLOC_CONTIGUOUS_VECTORS = 0x1,
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X86_IRQ_ALLOC_LEGACY = 0x2,
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};
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extern struct irq_domain *x86_vector_domain;
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extern void init_irq_alloc_info(struct irq_alloc_info *info,
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const struct cpumask *mask);
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extern void copy_irq_alloc_info(struct irq_alloc_info *dst,
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struct irq_alloc_info *src);
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#endif /* CONFIG_X86_LOCAL_APIC */
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#ifdef CONFIG_X86_IO_APIC
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struct device_node;
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struct irq_data;
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enum ioapic_domain_type {
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IOAPIC_DOMAIN_INVALID,
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IOAPIC_DOMAIN_LEGACY,
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IOAPIC_DOMAIN_STRICT,
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IOAPIC_DOMAIN_DYNAMIC,
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};
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struct ioapic_domain_cfg {
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enum ioapic_domain_type type;
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const struct irq_domain_ops *ops;
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struct device_node *dev;
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};
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extern const struct irq_domain_ops mp_ioapic_irqdomain_ops;
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extern int mp_irqdomain_alloc(struct irq_domain *domain, unsigned int virq,
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unsigned int nr_irqs, void *arg);
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extern void mp_irqdomain_free(struct irq_domain *domain, unsigned int virq,
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unsigned int nr_irqs);
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extern int mp_irqdomain_activate(struct irq_domain *domain,
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struct irq_data *irq_data, bool reserve);
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extern void mp_irqdomain_deactivate(struct irq_domain *domain,
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struct irq_data *irq_data);
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extern int mp_irqdomain_ioapic_idx(struct irq_domain *domain);
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#endif /* CONFIG_X86_IO_APIC */
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#ifdef CONFIG_PCI_MSI
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void x86_create_pci_msi_domain(void);
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struct irq_domain *native_create_pci_msi_domain(void);
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extern struct irq_domain *x86_pci_msi_default_domain;
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#else
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static inline void x86_create_pci_msi_domain(void) { }
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#define native_create_pci_msi_domain NULL
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#define x86_pci_msi_default_domain NULL
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#endif
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#endif
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