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ab7e5e34a9
Platform simply wants to run some code when the device is first opened/last closed. Use the core framework and locking for this. Aside from removing a bit of code this narrows the locking scope from a global lock. Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Yishai Hadas <yishaih@nvidia.com> Link: https://lore.kernel.org/r/7-v4-9ea22c5e6afb+1adf-vfio_reflck_jgg@nvidia.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
118 lines
3.2 KiB
C
118 lines
3.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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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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#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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#include <linux/vfio.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_device vdev;
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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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struct mutex igate;
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const char *compat;
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const char *acpihid;
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struct module *reset_module;
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struct device *device;
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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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int (*of_reset)(struct vfio_platform_device *vdev);
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bool reset_required;
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};
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typedef int (*vfio_platform_reset_fn_t)(struct vfio_platform_device *vdev);
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struct vfio_platform_reset_node {
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struct list_head link;
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char *compat;
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struct module *owner;
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vfio_platform_reset_fn_t of_reset;
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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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void vfio_platform_remove_common(struct vfio_platform_device *vdev);
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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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extern void __vfio_platform_register_reset(struct vfio_platform_reset_node *n);
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extern void vfio_platform_unregister_reset(const char *compat,
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vfio_platform_reset_fn_t fn);
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#define vfio_platform_register_reset(__compat, __reset) \
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static struct vfio_platform_reset_node __reset ## _node = { \
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.owner = THIS_MODULE, \
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.compat = __compat, \
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.of_reset = __reset, \
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}; \
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__vfio_platform_register_reset(&__reset ## _node)
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#define module_vfio_reset_handler(compat, reset) \
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MODULE_ALIAS("vfio-reset:" compat); \
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static int __init reset ## _module_init(void) \
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{ \
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vfio_platform_register_reset(compat, reset); \
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return 0; \
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}; \
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static void __exit reset ## _module_exit(void) \
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{ \
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vfio_platform_unregister_reset(compat, reset); \
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}; \
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module_init(reset ## _module_init); \
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module_exit(reset ## _module_exit)
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#endif /* VFIO_PLATFORM_PRIVATE_H */
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