1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (C) 2012 Red Hat, Inc. All rights reserved.
6 * Derived from original vfio:
7 * Copyright 2010 Cisco Systems, Inc. All rights reserved.
11 #include <linux/mutex.h>
12 #include <linux/pci.h>
13 #include <linux/irqbypass.h>
14 #include <linux/types.h>
15 #include <linux/uuid.h>
16 #include <linux/notifier.h>
18 #ifndef VFIO_PCI_PRIVATE_H
19 #define VFIO_PCI_PRIVATE_H
21 #define VFIO_PCI_OFFSET_SHIFT 40
23 #define VFIO_PCI_OFFSET_TO_INDEX(off) (off >> VFIO_PCI_OFFSET_SHIFT)
24 #define VFIO_PCI_INDEX_TO_OFFSET(index) ((u64)(index) << VFIO_PCI_OFFSET_SHIFT)
25 #define VFIO_PCI_OFFSET_MASK (((u64)(1) << VFIO_PCI_OFFSET_SHIFT) - 1)
27 /* Special capability IDs predefined access */
28 #define PCI_CAP_ID_INVALID 0xFF /* default raw access */
29 #define PCI_CAP_ID_INVALID_VIRT 0xFE /* default virt access */
31 /* Cap maximum number of ioeventfds per device (arbitrary) */
32 #define VFIO_PCI_IOEVENTFD_MAX 1000
34 struct vfio_pci_ioeventfd {
35 struct list_head next;
36 struct virqfd *virqfd;
44 struct vfio_pci_irq_ctx {
45 struct eventfd_ctx *trigger;
46 struct virqfd *unmask;
50 struct irq_bypass_producer producer;
53 struct vfio_pci_device;
54 struct vfio_pci_region;
56 struct vfio_pci_regops {
57 size_t (*rw)(struct vfio_pci_device *vdev, char __user *buf,
58 size_t count, loff_t *ppos, bool iswrite);
59 void (*release)(struct vfio_pci_device *vdev,
60 struct vfio_pci_region *region);
61 int (*mmap)(struct vfio_pci_device *vdev,
62 struct vfio_pci_region *region,
63 struct vm_area_struct *vma);
64 int (*add_capability)(struct vfio_pci_device *vdev,
65 struct vfio_pci_region *region,
66 struct vfio_info_cap *caps);
69 struct vfio_pci_region {
72 const struct vfio_pci_regops *ops;
78 struct vfio_pci_dummy_resource {
79 struct resource resource;
81 struct list_head res_next;
84 struct vfio_pci_reflck {
89 struct vfio_pci_vf_token {
95 struct vfio_pci_mmap_vma {
96 struct vm_area_struct *vma;
97 struct list_head vma_next;
100 struct vfio_pci_device {
101 struct pci_dev *pdev;
102 void __iomem *barmap[PCI_STD_NUM_BARS];
103 bool bar_mmap_supported[PCI_STD_NUM_BARS];
106 struct perm_bits *msi_perm;
109 struct vfio_pci_irq_ctx *ctx;
113 struct vfio_pci_region *region;
127 bool needs_pm_restore;
128 struct pci_saved_state *pci_saved_state;
129 struct pci_saved_state *pm_save;
130 struct vfio_pci_reflck *reflck;
133 struct eventfd_ctx *err_trigger;
134 struct eventfd_ctx *req_trigger;
135 struct list_head dummy_resources_list;
136 struct mutex ioeventfds_lock;
137 struct list_head ioeventfds_list;
138 struct vfio_pci_vf_token *vf_token;
139 struct notifier_block nb;
140 struct mutex vma_lock;
141 struct list_head vma_list;
142 struct rw_semaphore memory_lock;
145 #define is_intx(vdev) (vdev->irq_type == VFIO_PCI_INTX_IRQ_INDEX)
146 #define is_msi(vdev) (vdev->irq_type == VFIO_PCI_MSI_IRQ_INDEX)
147 #define is_msix(vdev) (vdev->irq_type == VFIO_PCI_MSIX_IRQ_INDEX)
148 #define is_irq_none(vdev) (!(is_intx(vdev) || is_msi(vdev) || is_msix(vdev)))
149 #define irq_is(vdev, type) (vdev->irq_type == type)
151 extern void vfio_pci_intx_mask(struct vfio_pci_device *vdev);
152 extern void vfio_pci_intx_unmask(struct vfio_pci_device *vdev);
154 extern int vfio_pci_set_irqs_ioctl(struct vfio_pci_device *vdev,
155 uint32_t flags, unsigned index,
156 unsigned start, unsigned count, void *data);
158 extern ssize_t vfio_pci_config_rw(struct vfio_pci_device *vdev,
159 char __user *buf, size_t count,
160 loff_t *ppos, bool iswrite);
162 extern ssize_t vfio_pci_bar_rw(struct vfio_pci_device *vdev, char __user *buf,
163 size_t count, loff_t *ppos, bool iswrite);
165 extern ssize_t vfio_pci_vga_rw(struct vfio_pci_device *vdev, char __user *buf,
166 size_t count, loff_t *ppos, bool iswrite);
168 extern long vfio_pci_ioeventfd(struct vfio_pci_device *vdev, loff_t offset,
169 uint64_t data, int count, int fd);
171 extern int vfio_pci_init_perm_bits(void);
172 extern void vfio_pci_uninit_perm_bits(void);
174 extern int vfio_config_init(struct vfio_pci_device *vdev);
175 extern void vfio_config_free(struct vfio_pci_device *vdev);
177 extern int vfio_pci_register_dev_region(struct vfio_pci_device *vdev,
178 unsigned int type, unsigned int subtype,
179 const struct vfio_pci_regops *ops,
180 size_t size, u32 flags, void *data);
182 extern int vfio_pci_set_power_state(struct vfio_pci_device *vdev,
185 extern bool __vfio_pci_memory_enabled(struct vfio_pci_device *vdev);
186 extern void vfio_pci_zap_and_down_write_memory_lock(struct vfio_pci_device
188 extern u16 vfio_pci_memory_lock_and_enable(struct vfio_pci_device *vdev);
189 extern void vfio_pci_memory_unlock_and_restore(struct vfio_pci_device *vdev,
192 #ifdef CONFIG_VFIO_PCI_IGD
193 extern int vfio_pci_igd_init(struct vfio_pci_device *vdev);
195 static inline int vfio_pci_igd_init(struct vfio_pci_device *vdev)
200 #ifdef CONFIG_VFIO_PCI_NVLINK2
201 extern int vfio_pci_nvdia_v100_nvlink2_init(struct vfio_pci_device *vdev);
202 extern int vfio_pci_ibm_npu2_init(struct vfio_pci_device *vdev);
204 static inline int vfio_pci_nvdia_v100_nvlink2_init(struct vfio_pci_device *vdev)
209 static inline int vfio_pci_ibm_npu2_init(struct vfio_pci_device *vdev)
214 #endif /* VFIO_PCI_PRIVATE_H */