1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
2 | /* |
3 | * Copyright (C) 2012 Red Hat, Inc. All rights reserved. |
4 | * Author: Alex Williamson <alex.williamson@redhat.com> |
5 | * |
6 | * Derived from original vfio: |
7 | * Copyright 2010 Cisco Systems, Inc. All rights reserved. |
8 | * Author: Tom Lyon, pugs@cisco.com |
9 | */ |
10 | |
11 | #include <linux/mutex.h> |
12 | #include <linux/pci.h> |
13 | #include <linux/vfio.h> |
14 | #include <linux/irqbypass.h> |
15 | #include <linux/types.h> |
16 | #include <linux/uuid.h> |
17 | #include <linux/notifier.h> |
18 | |
19 | #ifndef VFIO_PCI_CORE_H |
20 | #define VFIO_PCI_CORE_H |
21 | |
22 | #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) |
26 | |
27 | struct vfio_pci_core_device; |
28 | struct vfio_pci_region; |
29 | |
30 | struct vfio_pci_regops { |
31 | ssize_t (*rw)(struct vfio_pci_core_device *vdev, char __user *buf, |
32 | size_t count, loff_t *ppos, bool iswrite); |
33 | void (*release)(struct vfio_pci_core_device *vdev, |
34 | struct vfio_pci_region *region); |
35 | int (*mmap)(struct vfio_pci_core_device *vdev, |
36 | struct vfio_pci_region *region, |
37 | struct vm_area_struct *vma); |
38 | int (*add_capability)(struct vfio_pci_core_device *vdev, |
39 | struct vfio_pci_region *region, |
40 | struct vfio_info_cap *caps); |
41 | }; |
42 | |
43 | struct vfio_pci_region { |
44 | u32 type; |
45 | u32 subtype; |
46 | const struct vfio_pci_regops *ops; |
47 | void *data; |
48 | size_t size; |
49 | u32 flags; |
50 | }; |
51 | |
52 | struct vfio_pci_core_device { |
53 | struct vfio_device vdev; |
54 | struct pci_dev *pdev; |
55 | void __iomem *barmap[PCI_STD_NUM_BARS]; |
56 | bool bar_mmap_supported[PCI_STD_NUM_BARS]; |
57 | u8 *pci_config_map; |
58 | u8 *vconfig; |
59 | struct perm_bits *msi_perm; |
60 | spinlock_t irqlock; |
61 | struct mutex igate; |
62 | struct xarray ctx; |
63 | int irq_type; |
64 | int num_regions; |
65 | struct vfio_pci_region *region; |
66 | u8 msi_qmax; |
67 | u8 msix_bar; |
68 | u16 msix_size; |
69 | u32 msix_offset; |
70 | u32 rbar[7]; |
71 | bool has_dyn_msix:1; |
72 | bool pci_2_3:1; |
73 | bool virq_disabled:1; |
74 | bool reset_works:1; |
75 | bool extended_caps:1; |
76 | bool bardirty:1; |
77 | bool has_vga:1; |
78 | bool needs_reset:1; |
79 | bool nointx:1; |
80 | bool needs_pm_restore:1; |
81 | bool pm_intx_masked:1; |
82 | bool pm_runtime_engaged:1; |
83 | struct pci_saved_state *pci_saved_state; |
84 | struct pci_saved_state *pm_save; |
85 | int ioeventfds_nr; |
86 | struct eventfd_ctx *err_trigger; |
87 | struct eventfd_ctx *req_trigger; |
88 | struct eventfd_ctx *pm_wake_eventfd_ctx; |
89 | struct list_head dummy_resources_list; |
90 | struct mutex ioeventfds_lock; |
91 | struct list_head ioeventfds_list; |
92 | struct vfio_pci_vf_token *vf_token; |
93 | struct list_head sriov_pfs_item; |
94 | struct vfio_pci_core_device *sriov_pf_core_dev; |
95 | struct notifier_block nb; |
96 | struct mutex vma_lock; |
97 | struct list_head vma_list; |
98 | struct rw_semaphore memory_lock; |
99 | }; |
100 | |
101 | /* Will be exported for vfio pci drivers usage */ |
102 | int vfio_pci_core_register_dev_region(struct vfio_pci_core_device *vdev, |
103 | unsigned int type, unsigned int subtype, |
104 | const struct vfio_pci_regops *ops, |
105 | size_t size, u32 flags, void *data); |
106 | void vfio_pci_core_set_params(bool nointxmask, bool is_disable_vga, |
107 | bool is_disable_idle_d3); |
108 | void vfio_pci_core_close_device(struct vfio_device *core_vdev); |
109 | int vfio_pci_core_init_dev(struct vfio_device *core_vdev); |
110 | void vfio_pci_core_release_dev(struct vfio_device *core_vdev); |
111 | int vfio_pci_core_register_device(struct vfio_pci_core_device *vdev); |
112 | void vfio_pci_core_unregister_device(struct vfio_pci_core_device *vdev); |
113 | extern const struct pci_error_handlers vfio_pci_core_err_handlers; |
114 | int vfio_pci_core_sriov_configure(struct vfio_pci_core_device *vdev, |
115 | int nr_virtfn); |
116 | long vfio_pci_core_ioctl(struct vfio_device *core_vdev, unsigned int cmd, |
117 | unsigned long arg); |
118 | int vfio_pci_core_ioctl_feature(struct vfio_device *device, u32 flags, |
119 | void __user *arg, size_t argsz); |
120 | ssize_t vfio_pci_core_read(struct vfio_device *core_vdev, char __user *buf, |
121 | size_t count, loff_t *ppos); |
122 | ssize_t vfio_pci_core_write(struct vfio_device *core_vdev, const char __user *buf, |
123 | size_t count, loff_t *ppos); |
124 | int vfio_pci_core_mmap(struct vfio_device *core_vdev, struct vm_area_struct *vma); |
125 | void vfio_pci_core_request(struct vfio_device *core_vdev, unsigned int count); |
126 | int vfio_pci_core_match(struct vfio_device *core_vdev, char *buf); |
127 | int vfio_pci_core_enable(struct vfio_pci_core_device *vdev); |
128 | void vfio_pci_core_disable(struct vfio_pci_core_device *vdev); |
129 | void vfio_pci_core_finish_enable(struct vfio_pci_core_device *vdev); |
130 | int vfio_pci_core_setup_barmap(struct vfio_pci_core_device *vdev, int bar); |
131 | pci_ers_result_t vfio_pci_core_aer_err_detected(struct pci_dev *pdev, |
132 | pci_channel_state_t state); |
133 | ssize_t vfio_pci_core_do_io_rw(struct vfio_pci_core_device *vdev, bool test_mem, |
134 | void __iomem *io, char __user *buf, |
135 | loff_t off, size_t count, size_t x_start, |
136 | size_t x_end, bool iswrite); |
137 | bool vfio_pci_core_range_intersect_range(loff_t buf_start, size_t buf_cnt, |
138 | loff_t reg_start, size_t reg_cnt, |
139 | loff_t *buf_offset, |
140 | size_t *intersect_count, |
141 | size_t *register_offset); |
142 | #define VFIO_IOWRITE_DECLATION(size) \ |
143 | int vfio_pci_core_iowrite##size(struct vfio_pci_core_device *vdev, \ |
144 | bool test_mem, u##size val, void __iomem *io); |
145 | |
146 | VFIO_IOWRITE_DECLATION(8) |
147 | VFIO_IOWRITE_DECLATION(16) |
148 | VFIO_IOWRITE_DECLATION(32) |
149 | #ifdef iowrite64 |
150 | VFIO_IOWRITE_DECLATION(64) |
151 | #endif |
152 | |
153 | #define VFIO_IOREAD_DECLATION(size) \ |
154 | int vfio_pci_core_ioread##size(struct vfio_pci_core_device *vdev, \ |
155 | bool test_mem, u##size *val, void __iomem *io); |
156 | |
157 | VFIO_IOREAD_DECLATION(8) |
158 | VFIO_IOREAD_DECLATION(16) |
159 | VFIO_IOREAD_DECLATION(32) |
160 | |
161 | #endif /* VFIO_PCI_CORE_H */ |
162 | |