| /* |
| * 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> |
| |
| #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 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; |
| struct pci_saved_state *pci_saved_state; |
| atomic_t refcnt; |
| }; |
| |
| #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_readwrite(struct vfio_pci_device *vdev, |
| char __user *buf, size_t count, |
| loff_t *ppos, bool iswrite); |
| extern ssize_t vfio_pci_mem_readwrite(struct vfio_pci_device *vdev, |
| char __user *buf, size_t count, |
| loff_t *ppos, bool iswrite); |
| extern ssize_t vfio_pci_io_readwrite(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_pci_virqfd_init(void); |
| extern void vfio_pci_virqfd_exit(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 */ |