irq_remapping.h 2.9 KB
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/*
 * Copyright (C) 2012 Advanced Micro Devices, Inc.
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Joerg Roedel 已提交
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 * Author: Joerg Roedel <jroedel@suse.de>
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 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 * This header file contains stuff that is shared between different interrupt
 * remapping drivers but with no need to be visible outside of the IOMMU layer.
 */

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#ifndef __IRQ_REMAPPING_H
#define __IRQ_REMAPPING_H
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#ifdef CONFIG_IRQ_REMAP

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struct IO_APIC_route_entry;
struct io_apic_irq_attr;
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struct irq_data;
struct cpumask;
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struct pci_dev;
struct msi_msg;
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struct irq_domain;
struct irq_alloc_info;
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extern int irq_remap_broken;
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extern int disable_sourceid_checking;
extern int no_x2apic_optout;
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extern int irq_remapping_enabled;
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struct irq_remap_ops {
	/* Initializes hardware and makes it ready for remapping interrupts */
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	int  (*prepare)(void);
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	/* Enables the remapping hardware */
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	int  (*enable)(void);
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	/* Disables the remapping hardware */
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	void (*disable)(void);
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	/* Reenables the remapping hardware */
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	int  (*reenable)(int);
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	/* Enable fault handling */
	int  (*enable_faulting)(void);
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	/* IO-APIC setup routine */
	int (*setup_ioapic_entry)(int irq, struct IO_APIC_route_entry *,
				  unsigned int, int,
				  struct io_apic_irq_attr *);
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	/* Set the CPU affinity of a remapped interrupt */
	int (*set_affinity)(struct irq_data *data, const struct cpumask *mask,
			    bool force);
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	/* Free an IRQ */
	int (*free_irq)(int);
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	/* Create MSI msg to use for interrupt remapping */
	void (*compose_msi_msg)(struct pci_dev *,
				unsigned int, unsigned int,
				struct msi_msg *, u8);

	/* Allocate remapping resources for MSI */
	int (*msi_alloc_irq)(struct pci_dev *, int, int);

	/* Setup the remapped MSI irq */
	int (*msi_setup_irq)(struct pci_dev *, unsigned int, int, int);

	/* Setup interrupt remapping for an HPET MSI */
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	int (*alloc_hpet_msi)(unsigned int, unsigned int);
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	/* Get the irqdomain associated the IOMMU device */
	struct irq_domain *(*get_ir_irq_domain)(struct irq_alloc_info *);

	/* Get the MSI irqdomain associated with the IOMMU device */
	struct irq_domain *(*get_irq_domain)(struct irq_alloc_info *);
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};

extern struct irq_remap_ops intel_irq_remap_ops;
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extern struct irq_remap_ops amd_iommu_irq_ops;
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extern void ir_ack_apic_edge(struct irq_data *data);

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#else  /* CONFIG_IRQ_REMAP */

#define irq_remapping_enabled 0
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#define irq_remap_broken      0
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#endif /* CONFIG_IRQ_REMAP */

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#endif /* __IRQ_REMAPPING_H */