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a7fa7c77cf
With this patch the VFIO user will be able to set an eventfd that can be used in order to mask and unmask IRQs of platform devices. Signed-off-by: Antonios Motakis <a.motakis@virtualopensystems.com> Signed-off-by: Baptiste Reynal <b.reynal@virtualopensystems.com> Reviewed-by: Eric Auger <eric.auger@linaro.org> Tested-by: Eric Auger <eric.auger@linaro.org> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
85 lines
2.4 KiB
C
85 lines
2.4 KiB
C
/*
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* Copyright (C) 2013 - Virtual Open Systems
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* Author: Antonios Motakis <a.motakis@virtualopensystems.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, version 2, as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef VFIO_PLATFORM_PRIVATE_H
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#define VFIO_PLATFORM_PRIVATE_H
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#include <linux/types.h>
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#include <linux/interrupt.h>
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#define VFIO_PLATFORM_OFFSET_SHIFT 40
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#define VFIO_PLATFORM_OFFSET_MASK (((u64)(1) << VFIO_PLATFORM_OFFSET_SHIFT) - 1)
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#define VFIO_PLATFORM_OFFSET_TO_INDEX(off) \
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(off >> VFIO_PLATFORM_OFFSET_SHIFT)
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#define VFIO_PLATFORM_INDEX_TO_OFFSET(index) \
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((u64)(index) << VFIO_PLATFORM_OFFSET_SHIFT)
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struct vfio_platform_irq {
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u32 flags;
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u32 count;
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int hwirq;
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char *name;
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struct eventfd_ctx *trigger;
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bool masked;
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spinlock_t lock;
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struct virqfd *unmask;
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struct virqfd *mask;
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};
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struct vfio_platform_region {
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u64 addr;
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resource_size_t size;
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u32 flags;
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u32 type;
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#define VFIO_PLATFORM_REGION_TYPE_MMIO 1
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#define VFIO_PLATFORM_REGION_TYPE_PIO 2
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void __iomem *ioaddr;
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};
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struct vfio_platform_device {
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struct vfio_platform_region *regions;
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u32 num_regions;
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struct vfio_platform_irq *irqs;
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u32 num_irqs;
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int refcnt;
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struct mutex igate;
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/*
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* These fields should be filled by the bus specific binder
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*/
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void *opaque;
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const char *name;
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uint32_t flags;
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/* callbacks to discover device resources */
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struct resource*
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(*get_resource)(struct vfio_platform_device *vdev, int i);
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int (*get_irq)(struct vfio_platform_device *vdev, int i);
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};
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extern int vfio_platform_probe_common(struct vfio_platform_device *vdev,
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struct device *dev);
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extern struct vfio_platform_device *vfio_platform_remove_common
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(struct device *dev);
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extern int vfio_platform_irq_init(struct vfio_platform_device *vdev);
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extern void vfio_platform_irq_cleanup(struct vfio_platform_device *vdev);
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extern int vfio_platform_set_irqs_ioctl(struct vfio_platform_device *vdev,
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uint32_t flags, unsigned index,
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unsigned start, unsigned count,
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void *data);
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#endif /* VFIO_PLATFORM_PRIVATE_H */
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