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- /*
- * Copyright (C) 2012 Red Hat, Inc. All rights reserved.
- * Author: Alex Williamson <alex.williamson@redhat.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.
- *
- * Derived from original vfio:
- * Copyright 2010 Cisco Systems, Inc. All rights reserved.
- * Author: Tom Lyon, pugs@cisco.com
- */
- #include <linux/mutex.h>
- #include <linux/pci.h>
- #include <linux/irqbypass.h>
- #ifndef VFIO_PCI_PRIVATE_H
- #define VFIO_PCI_PRIVATE_H
- #define VFIO_PCI_OFFSET_SHIFT 40
- #define VFIO_PCI_OFFSET_TO_INDEX(off) (off >> VFIO_PCI_OFFSET_SHIFT)
- #define VFIO_PCI_INDEX_TO_OFFSET(index) ((u64)(index) << VFIO_PCI_OFFSET_SHIFT)
- #define VFIO_PCI_OFFSET_MASK (((u64)(1) << VFIO_PCI_OFFSET_SHIFT) - 1)
- struct vfio_pci_irq_ctx {
- struct eventfd_ctx *trigger;
- struct virqfd *unmask;
- struct virqfd *mask;
- char *name;
- bool masked;
- struct irq_bypass_producer producer;
- };
- struct vfio_pci_device {
- struct pci_dev *pdev;
- void __iomem *barmap[PCI_STD_RESOURCE_END + 1];
- u8 *pci_config_map;
- u8 *vconfig;
- struct perm_bits *msi_perm;
- spinlock_t irqlock;
- struct mutex igate;
- struct msix_entry *msix;
- struct vfio_pci_irq_ctx *ctx;
- int num_ctx;
- int irq_type;
- u8 msi_qmax;
- u8 msix_bar;
- u16 msix_size;
- u32 msix_offset;
- u32 rbar[7];
- bool pci_2_3;
- bool virq_disabled;
- bool reset_works;
- bool extended_caps;
- bool bardirty;
- bool has_vga;
- bool needs_reset;
- struct pci_saved_state *pci_saved_state;
- int refcnt;
- struct eventfd_ctx *err_trigger;
- struct eventfd_ctx *req_trigger;
- };
- #define is_intx(vdev) (vdev->irq_type == VFIO_PCI_INTX_IRQ_INDEX)
- #define is_msi(vdev) (vdev->irq_type == VFIO_PCI_MSI_IRQ_INDEX)
- #define is_msix(vdev) (vdev->irq_type == VFIO_PCI_MSIX_IRQ_INDEX)
- #define is_irq_none(vdev) (!(is_intx(vdev) || is_msi(vdev) || is_msix(vdev)))
- #define irq_is(vdev, type) (vdev->irq_type == type)
- extern void vfio_pci_intx_mask(struct vfio_pci_device *vdev);
- extern void vfio_pci_intx_unmask(struct vfio_pci_device *vdev);
- extern int vfio_pci_set_irqs_ioctl(struct vfio_pci_device *vdev,
- uint32_t flags, unsigned index,
- unsigned start, unsigned count, void *data);
- extern ssize_t vfio_pci_config_rw(struct vfio_pci_device *vdev,
- char __user *buf, size_t count,
- loff_t *ppos, bool iswrite);
- extern ssize_t vfio_pci_bar_rw(struct vfio_pci_device *vdev, char __user *buf,
- size_t count, loff_t *ppos, bool iswrite);
- extern ssize_t vfio_pci_vga_rw(struct vfio_pci_device *vdev, char __user *buf,
- size_t count, loff_t *ppos, bool iswrite);
- extern int vfio_pci_init_perm_bits(void);
- extern void vfio_pci_uninit_perm_bits(void);
- extern int vfio_config_init(struct vfio_pci_device *vdev);
- extern void vfio_config_free(struct vfio_pci_device *vdev);
- #endif /* VFIO_PCI_PRIVATE_H */
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