bc4fba7712
Each time a device is released, mark whether a local reset was successful or whether a bus/slot reset is needed. If a reset is needed and all of the affected devices are bound to vfio-pci and unused, allow the reset. This is most useful when the userspace driver is killed and releases all the devices in an unclean state, such as when a QEMU VM quits. Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
94 lines
2.8 KiB
C
94 lines
2.8 KiB
C
/*
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* Copyright (C) 2012 Red Hat, Inc. All rights reserved.
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* Author: Alex Williamson <alex.williamson@redhat.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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* Derived from original vfio:
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* Copyright 2010 Cisco Systems, Inc. All rights reserved.
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* Author: Tom Lyon, pugs@cisco.com
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*/
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#include <linux/mutex.h>
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#include <linux/pci.h>
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#ifndef VFIO_PCI_PRIVATE_H
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#define VFIO_PCI_PRIVATE_H
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#define VFIO_PCI_OFFSET_SHIFT 40
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#define VFIO_PCI_OFFSET_TO_INDEX(off) (off >> VFIO_PCI_OFFSET_SHIFT)
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#define VFIO_PCI_INDEX_TO_OFFSET(index) ((u64)(index) << VFIO_PCI_OFFSET_SHIFT)
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#define VFIO_PCI_OFFSET_MASK (((u64)(1) << VFIO_PCI_OFFSET_SHIFT) - 1)
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struct vfio_pci_irq_ctx {
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struct eventfd_ctx *trigger;
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struct virqfd *unmask;
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struct virqfd *mask;
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char *name;
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bool masked;
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};
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struct vfio_pci_device {
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struct pci_dev *pdev;
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void __iomem *barmap[PCI_STD_RESOURCE_END + 1];
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u8 *pci_config_map;
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u8 *vconfig;
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struct perm_bits *msi_perm;
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spinlock_t irqlock;
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struct mutex igate;
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struct msix_entry *msix;
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struct vfio_pci_irq_ctx *ctx;
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int num_ctx;
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int irq_type;
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u8 msi_qmax;
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u8 msix_bar;
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u16 msix_size;
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u32 msix_offset;
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u32 rbar[7];
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bool pci_2_3;
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bool virq_disabled;
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bool reset_works;
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bool extended_caps;
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bool bardirty;
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bool has_vga;
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bool needs_reset;
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struct pci_saved_state *pci_saved_state;
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int refcnt;
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struct eventfd_ctx *err_trigger;
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};
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#define is_intx(vdev) (vdev->irq_type == VFIO_PCI_INTX_IRQ_INDEX)
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#define is_msi(vdev) (vdev->irq_type == VFIO_PCI_MSI_IRQ_INDEX)
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#define is_msix(vdev) (vdev->irq_type == VFIO_PCI_MSIX_IRQ_INDEX)
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#define is_irq_none(vdev) (!(is_intx(vdev) || is_msi(vdev) || is_msix(vdev)))
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#define irq_is(vdev, type) (vdev->irq_type == type)
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extern void vfio_pci_intx_mask(struct vfio_pci_device *vdev);
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extern void vfio_pci_intx_unmask(struct vfio_pci_device *vdev);
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extern int vfio_pci_set_irqs_ioctl(struct vfio_pci_device *vdev,
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uint32_t flags, unsigned index,
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unsigned start, unsigned count, void *data);
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extern ssize_t vfio_pci_config_rw(struct vfio_pci_device *vdev,
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char __user *buf, size_t count,
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loff_t *ppos, bool iswrite);
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extern ssize_t vfio_pci_bar_rw(struct vfio_pci_device *vdev, char __user *buf,
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size_t count, loff_t *ppos, bool iswrite);
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extern ssize_t vfio_pci_vga_rw(struct vfio_pci_device *vdev, char __user *buf,
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size_t count, loff_t *ppos, bool iswrite);
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extern int vfio_pci_init_perm_bits(void);
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extern void vfio_pci_uninit_perm_bits(void);
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extern int vfio_pci_virqfd_init(void);
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extern void vfio_pci_virqfd_exit(void);
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extern int vfio_config_init(struct vfio_pci_device *vdev);
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extern void vfio_config_free(struct vfio_pci_device *vdev);
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#endif /* VFIO_PCI_PRIVATE_H */
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