1 /* 2 * Copyright (C) 2012 Red Hat, Inc. All rights reserved. 3 * Author: Alex Williamson <alex.williamson@redhat.com> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * Derived from original vfio: 10 * Copyright 2010 Cisco Systems, Inc. All rights reserved. 11 * Author: Tom Lyon, pugs@cisco.com 12 */ 13 14 #include <linux/mutex.h> 15 #include <linux/pci.h> 16 17 #ifndef VFIO_PCI_PRIVATE_H 18 #define VFIO_PCI_PRIVATE_H 19 20 #define VFIO_PCI_OFFSET_SHIFT 40 21 22 #define VFIO_PCI_OFFSET_TO_INDEX(off) (off >> VFIO_PCI_OFFSET_SHIFT) 23 #define VFIO_PCI_INDEX_TO_OFFSET(index) ((u64)(index) << VFIO_PCI_OFFSET_SHIFT) 24 #define VFIO_PCI_OFFSET_MASK (((u64)(1) << VFIO_PCI_OFFSET_SHIFT) - 1) 25 26 struct vfio_pci_irq_ctx { 27 struct eventfd_ctx *trigger; 28 struct virqfd *unmask; 29 struct virqfd *mask; 30 char *name; 31 bool masked; 32 }; 33 34 struct vfio_pci_device { 35 struct pci_dev *pdev; 36 void __iomem *barmap[PCI_STD_RESOURCE_END + 1]; 37 u8 *pci_config_map; 38 u8 *vconfig; 39 struct perm_bits *msi_perm; 40 spinlock_t irqlock; 41 struct mutex igate; 42 struct msix_entry *msix; 43 struct vfio_pci_irq_ctx *ctx; 44 int num_ctx; 45 int irq_type; 46 u8 msi_qmax; 47 u8 msix_bar; 48 u16 msix_size; 49 u32 msix_offset; 50 u32 rbar[7]; 51 bool pci_2_3; 52 bool virq_disabled; 53 bool reset_works; 54 bool extended_caps; 55 bool bardirty; 56 bool has_vga; 57 bool needs_reset; 58 struct pci_saved_state *pci_saved_state; 59 int refcnt; 60 struct eventfd_ctx *err_trigger; 61 }; 62 63 #define is_intx(vdev) (vdev->irq_type == VFIO_PCI_INTX_IRQ_INDEX) 64 #define is_msi(vdev) (vdev->irq_type == VFIO_PCI_MSI_IRQ_INDEX) 65 #define is_msix(vdev) (vdev->irq_type == VFIO_PCI_MSIX_IRQ_INDEX) 66 #define is_irq_none(vdev) (!(is_intx(vdev) || is_msi(vdev) || is_msix(vdev))) 67 #define irq_is(vdev, type) (vdev->irq_type == type) 68 69 extern void vfio_pci_intx_mask(struct vfio_pci_device *vdev); 70 extern void vfio_pci_intx_unmask(struct vfio_pci_device *vdev); 71 72 extern int vfio_pci_set_irqs_ioctl(struct vfio_pci_device *vdev, 73 uint32_t flags, unsigned index, 74 unsigned start, unsigned count, void *data); 75 76 extern ssize_t vfio_pci_config_rw(struct vfio_pci_device *vdev, 77 char __user *buf, size_t count, 78 loff_t *ppos, bool iswrite); 79 80 extern ssize_t vfio_pci_bar_rw(struct vfio_pci_device *vdev, char __user *buf, 81 size_t count, loff_t *ppos, bool iswrite); 82 83 extern ssize_t vfio_pci_vga_rw(struct vfio_pci_device *vdev, char __user *buf, 84 size_t count, loff_t *ppos, bool iswrite); 85 86 extern int vfio_pci_init_perm_bits(void); 87 extern void vfio_pci_uninit_perm_bits(void); 88 89 extern int vfio_pci_virqfd_init(void); 90 extern void vfio_pci_virqfd_exit(void); 91 92 extern int vfio_config_init(struct vfio_pci_device *vdev); 93 extern void vfio_config_free(struct vfio_pci_device *vdev); 94 #endif /* VFIO_PCI_PRIVATE_H */ 95