diff options
Diffstat (limited to 'drivers/vfio/pci/vfio_pci_private.h')
| -rw-r--r-- | drivers/vfio/pci/vfio_pci_private.h | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/drivers/vfio/pci/vfio_pci_private.h b/drivers/vfio/pci/vfio_pci_private.h new file mode 100644 index 00000000000..611827cba8c --- /dev/null +++ b/drivers/vfio/pci/vfio_pci_private.h @@ -0,0 +1,91 @@ +/* + * 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 */ |