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[J-linux.git] / include / linux / vfio_pci_core.h
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright (C) 2012 Red Hat, Inc.  All rights reserved.
4  *     Author: Alex Williamson <[email protected]>
5  *
6  * Derived from original vfio:
7  * Copyright 2010 Cisco Systems, Inc.  All rights reserved.
8  * Author: Tom Lyon, [email protected]
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 rw_semaphore     memory_lock;
97 };
98
99 /* Will be exported for vfio pci drivers usage */
100 int vfio_pci_core_register_dev_region(struct vfio_pci_core_device *vdev,
101                                       unsigned int type, unsigned int subtype,
102                                       const struct vfio_pci_regops *ops,
103                                       size_t size, u32 flags, void *data);
104 void vfio_pci_core_set_params(bool nointxmask, bool is_disable_vga,
105                               bool is_disable_idle_d3);
106 void vfio_pci_core_close_device(struct vfio_device *core_vdev);
107 int vfio_pci_core_init_dev(struct vfio_device *core_vdev);
108 void vfio_pci_core_release_dev(struct vfio_device *core_vdev);
109 int vfio_pci_core_register_device(struct vfio_pci_core_device *vdev);
110 void vfio_pci_core_unregister_device(struct vfio_pci_core_device *vdev);
111 extern const struct pci_error_handlers vfio_pci_core_err_handlers;
112 int vfio_pci_core_sriov_configure(struct vfio_pci_core_device *vdev,
113                                   int nr_virtfn);
114 long vfio_pci_core_ioctl(struct vfio_device *core_vdev, unsigned int cmd,
115                 unsigned long arg);
116 int vfio_pci_core_ioctl_feature(struct vfio_device *device, u32 flags,
117                                 void __user *arg, size_t argsz);
118 ssize_t vfio_pci_core_read(struct vfio_device *core_vdev, char __user *buf,
119                 size_t count, loff_t *ppos);
120 ssize_t vfio_pci_core_write(struct vfio_device *core_vdev, const char __user *buf,
121                 size_t count, loff_t *ppos);
122 int vfio_pci_core_mmap(struct vfio_device *core_vdev, struct vm_area_struct *vma);
123 void vfio_pci_core_request(struct vfio_device *core_vdev, unsigned int count);
124 int vfio_pci_core_match(struct vfio_device *core_vdev, char *buf);
125 int vfio_pci_core_enable(struct vfio_pci_core_device *vdev);
126 void vfio_pci_core_disable(struct vfio_pci_core_device *vdev);
127 void vfio_pci_core_finish_enable(struct vfio_pci_core_device *vdev);
128 int vfio_pci_core_setup_barmap(struct vfio_pci_core_device *vdev, int bar);
129 pci_ers_result_t vfio_pci_core_aer_err_detected(struct pci_dev *pdev,
130                                                 pci_channel_state_t state);
131 ssize_t vfio_pci_core_do_io_rw(struct vfio_pci_core_device *vdev, bool test_mem,
132                                void __iomem *io, char __user *buf,
133                                loff_t off, size_t count, size_t x_start,
134                                size_t x_end, bool iswrite);
135 bool vfio_pci_core_range_intersect_range(loff_t buf_start, size_t buf_cnt,
136                                          loff_t reg_start, size_t reg_cnt,
137                                          loff_t *buf_offset,
138                                          size_t *intersect_count,
139                                          size_t *register_offset);
140 #define VFIO_IOWRITE_DECLARATION(size) \
141 int vfio_pci_core_iowrite##size(struct vfio_pci_core_device *vdev,      \
142                         bool test_mem, u##size val, void __iomem *io);
143
144 VFIO_IOWRITE_DECLARATION(8)
145 VFIO_IOWRITE_DECLARATION(16)
146 VFIO_IOWRITE_DECLARATION(32)
147 #ifdef iowrite64
148 VFIO_IOWRITE_DECLARATION(64)
149 #endif
150
151 #define VFIO_IOREAD_DECLARATION(size) \
152 int vfio_pci_core_ioread##size(struct vfio_pci_core_device *vdev,       \
153                         bool test_mem, u##size *val, void __iomem *io);
154
155 VFIO_IOREAD_DECLARATION(8)
156 VFIO_IOREAD_DECLARATION(16)
157 VFIO_IOREAD_DECLARATION(32)
158 #ifdef ioread64
159 VFIO_IOREAD_DECLARATION(64)
160 #endif
161
162 #endif /* VFIO_PCI_CORE_H */
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