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linux-next/drivers/iommu/irq_remapping.h
Yijing Wang 5fc24d8cb9 iommu/irq_remapping: Fix the regression of hpet irq remapping
Commit 71054d8841 ("x86, hpet: Introduce x86_msi_ops.setup_hpet_msi")
introduced x86_msi_ops.setup_hpet_msi to setup hpet MSI irq
when irq remapping enabled. This caused a regression of
hpet MSI irq remapping.

Original code flow before commit 71054d8841:
hpet_setup_msi_irq()
	arch_setup_hpet_msi()
		setup_hpet_msi_remapped()
			remap_ops->setup_hpet_msi()
				alloc_irte()
		msi_compose_msg()
		hpet_msi_write()
		...

Current code flow after commit 71054d8841:
hpet_setup_msi_irq()
	x86_msi.setup_hpet_msi()
		setup_hpet_msi_remapped()
			intel_setup_hpet_msi()
				alloc_irte()

Currently, we only call alloc_irte() for hpet MSI, but
do not composed and wrote its msg...

Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-09-25 19:11:47 +02:00

98 lines
2.7 KiB
C

/*
* Copyright (C) 2012 Advanced Micro Devices, Inc.
* Author: Joerg Roedel <joerg.roedel@amd.com>
*
* 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.
*/
#ifndef __IRQ_REMAPPING_H
#define __IRQ_REMAPPING_H
#ifdef CONFIG_IRQ_REMAP
struct IO_APIC_route_entry;
struct io_apic_irq_attr;
struct irq_data;
struct cpumask;
struct pci_dev;
struct msi_msg;
extern int disable_irq_remap;
extern int irq_remap_broken;
extern int disable_sourceid_checking;
extern int no_x2apic_optout;
extern int irq_remapping_enabled;
struct irq_remap_ops {
/* Check whether Interrupt Remapping is supported */
int (*supported)(void);
/* Initializes hardware and makes it ready for remapping interrupts */
int (*prepare)(void);
/* Enables the remapping hardware */
int (*enable)(void);
/* Disables the remapping hardware */
void (*disable)(void);
/* Reenables the remapping hardware */
int (*reenable)(int);
/* Enable fault handling */
int (*enable_faulting)(void);
/* IO-APIC setup routine */
int (*setup_ioapic_entry)(int irq, struct IO_APIC_route_entry *,
unsigned int, int,
struct io_apic_irq_attr *);
/* Set the CPU affinity of a remapped interrupt */
int (*set_affinity)(struct irq_data *data, const struct cpumask *mask,
bool force);
/* Free an IRQ */
int (*free_irq)(int);
/* 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 */
int (*alloc_hpet_msi)(unsigned int, unsigned int);
};
extern struct irq_remap_ops intel_irq_remap_ops;
extern struct irq_remap_ops amd_iommu_irq_ops;
#else /* CONFIG_IRQ_REMAP */
#define irq_remapping_enabled 0
#define disable_irq_remap 1
#define irq_remap_broken 0
#endif /* CONFIG_IRQ_REMAP */
#endif /* __IRQ_REMAPPING_H */