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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/rcupdate.h>
16#include <linux/types.h>
17#include <linux/uuid.h>
18#include <linux/notifier.h>
19
20#ifndef VFIO_PCI_CORE_H
21#define VFIO_PCI_CORE_H
22
23#define VFIO_PCI_OFFSET_SHIFT 40
24#define VFIO_PCI_OFFSET_TO_INDEX(off) (off >> VFIO_PCI_OFFSET_SHIFT)
25#define VFIO_PCI_INDEX_TO_OFFSET(index) ((u64)(index) << VFIO_PCI_OFFSET_SHIFT)
26#define VFIO_PCI_OFFSET_MASK (((u64)(1) << VFIO_PCI_OFFSET_SHIFT) - 1)
27
28struct vfio_pci_core_device;
29struct vfio_pci_region;
30struct p2pdma_provider;
31struct dma_buf_phys_vec;
32struct dma_buf_attachment;
33
34struct vfio_pci_eventfd {
35 struct eventfd_ctx *ctx;
36 struct rcu_head rcu;
37};
38
39struct vfio_pci_regops {
40 ssize_t (*rw)(struct vfio_pci_core_device *vdev, char __user *buf,
41 size_t count, loff_t *ppos, bool iswrite);
42 void (*release)(struct vfio_pci_core_device *vdev,
43 struct vfio_pci_region *region);
44 int (*mmap)(struct vfio_pci_core_device *vdev,
45 struct vfio_pci_region *region,
46 struct vm_area_struct *vma);
47 int (*add_capability)(struct vfio_pci_core_device *vdev,
48 struct vfio_pci_region *region,
49 struct vfio_info_cap *caps);
50};
51
52struct vfio_pci_region {
53 u32 type;
54 u32 subtype;
55 const struct vfio_pci_regops *ops;
56 void *data;
57 size_t size;
58 u32 flags;
59};
60
61struct vfio_pci_device_ops {
62 int (*get_dmabuf_phys)(struct vfio_pci_core_device *vdev,
63 struct p2pdma_provider **provider,
64 unsigned int region_index,
65 struct dma_buf_phys_vec *phys_vec,
66 struct vfio_region_dma_range *dma_ranges,
67 size_t nr_ranges);
68};
69
70#if IS_ENABLED(CONFIG_VFIO_PCI_DMABUF)
71int vfio_pci_core_fill_phys_vec(struct dma_buf_phys_vec *phys_vec,
72 struct vfio_region_dma_range *dma_ranges,
73 size_t nr_ranges, phys_addr_t start,
74 phys_addr_t len);
75int vfio_pci_core_get_dmabuf_phys(struct vfio_pci_core_device *vdev,
76 struct p2pdma_provider **provider,
77 unsigned int region_index,
78 struct dma_buf_phys_vec *phys_vec,
79 struct vfio_region_dma_range *dma_ranges,
80 size_t nr_ranges);
81#else
82static inline int
83vfio_pci_core_fill_phys_vec(struct dma_buf_phys_vec *phys_vec,
84 struct vfio_region_dma_range *dma_ranges,
85 size_t nr_ranges, phys_addr_t start,
86 phys_addr_t len)
87{
88 return -EINVAL;
89}
90static inline int vfio_pci_core_get_dmabuf_phys(
91 struct vfio_pci_core_device *vdev, struct p2pdma_provider **provider,
92 unsigned int region_index, struct dma_buf_phys_vec *phys_vec,
93 struct vfio_region_dma_range *dma_ranges, size_t nr_ranges)
94{
95 return -EOPNOTSUPP;
96}
97#endif
98
99struct vfio_pci_core_device {
100 struct vfio_device vdev;
101 struct pci_dev *pdev;
102 const struct vfio_pci_device_ops *pci_ops;
103 void __iomem *barmap[PCI_STD_NUM_BARS];
104 bool bar_mmap_supported[PCI_STD_NUM_BARS];
105 u8 *pci_config_map;
106 u8 *vconfig;
107 struct perm_bits *msi_perm;
108 spinlock_t irqlock;
109 struct mutex igate;
110 struct xarray ctx;
111 int irq_type;
112 int num_regions;
113 struct vfio_pci_region *region;
114 u8 msi_qmax;
115 u8 msix_bar;
116 u16 msix_size;
117 u32 msix_offset;
118 u32 rbar[7];
119 bool has_dyn_msix:1;
120 bool pci_2_3:1;
121 bool virq_disabled:1;
122 bool reset_works:1;
123 bool extended_caps:1;
124 bool bardirty:1;
125 bool has_vga:1;
126 bool needs_reset:1;
127 bool nointx:1;
128 bool needs_pm_restore:1;
129 bool pm_intx_masked:1;
130 bool pm_runtime_engaged:1;
131 struct pci_saved_state *pci_saved_state;
132 struct pci_saved_state *pm_save;
133 int ioeventfds_nr;
134 struct vfio_pci_eventfd __rcu *err_trigger;
135 struct vfio_pci_eventfd __rcu *req_trigger;
136 struct eventfd_ctx *pm_wake_eventfd_ctx;
137 struct list_head dummy_resources_list;
138 struct mutex ioeventfds_lock;
139 struct list_head ioeventfds_list;
140 struct vfio_pci_vf_token *vf_token;
141 struct list_head sriov_pfs_item;
142 struct vfio_pci_core_device *sriov_pf_core_dev;
143 struct notifier_block nb;
144 struct rw_semaphore memory_lock;
145 struct list_head dmabufs;
146};
147
148enum vfio_pci_io_width {
149 VFIO_PCI_IO_WIDTH_1 = 1,
150 VFIO_PCI_IO_WIDTH_2 = 2,
151 VFIO_PCI_IO_WIDTH_4 = 4,
152 VFIO_PCI_IO_WIDTH_8 = 8,
153};
154
155/* Will be exported for vfio pci drivers usage */
156int vfio_pci_core_register_dev_region(struct vfio_pci_core_device *vdev,
157 unsigned int type, unsigned int subtype,
158 const struct vfio_pci_regops *ops,
159 size_t size, u32 flags, void *data);
160void vfio_pci_core_set_params(bool nointxmask, bool is_disable_vga,
161 bool is_disable_idle_d3);
162void vfio_pci_core_close_device(struct vfio_device *core_vdev);
163int vfio_pci_core_init_dev(struct vfio_device *core_vdev);
164void vfio_pci_core_release_dev(struct vfio_device *core_vdev);
165int vfio_pci_core_register_device(struct vfio_pci_core_device *vdev);
166void vfio_pci_core_unregister_device(struct vfio_pci_core_device *vdev);
167extern const struct pci_error_handlers vfio_pci_core_err_handlers;
168int vfio_pci_core_sriov_configure(struct vfio_pci_core_device *vdev,
169 int nr_virtfn);
170long vfio_pci_core_ioctl(struct vfio_device *core_vdev, unsigned int cmd,
171 unsigned long arg);
172int vfio_pci_core_ioctl_feature(struct vfio_device *device, u32 flags,
173 void __user *arg, size_t argsz);
174int vfio_pci_ioctl_get_region_info(struct vfio_device *core_vdev,
175 struct vfio_region_info *info,
176 struct vfio_info_cap *caps);
177ssize_t vfio_pci_core_read(struct vfio_device *core_vdev, char __user *buf,
178 size_t count, loff_t *ppos);
179ssize_t vfio_pci_core_write(struct vfio_device *core_vdev, const char __user *buf,
180 size_t count, loff_t *ppos);
181vm_fault_t vfio_pci_vmf_insert_pfn(struct vfio_pci_core_device *vdev,
182 struct vm_fault *vmf, unsigned long pfn,
183 unsigned int order);
184int vfio_pci_core_mmap(struct vfio_device *core_vdev, struct vm_area_struct *vma);
185void vfio_pci_core_request(struct vfio_device *core_vdev, unsigned int count);
186int vfio_pci_core_match(struct vfio_device *core_vdev, char *buf);
187int vfio_pci_core_match_token_uuid(struct vfio_device *core_vdev,
188 const uuid_t *uuid);
189int vfio_pci_core_enable(struct vfio_pci_core_device *vdev);
190void vfio_pci_core_disable(struct vfio_pci_core_device *vdev);
191void vfio_pci_core_finish_enable(struct vfio_pci_core_device *vdev);
192int vfio_pci_core_setup_barmap(struct vfio_pci_core_device *vdev, int bar);
193pci_ers_result_t vfio_pci_core_aer_err_detected(struct pci_dev *pdev,
194 pci_channel_state_t state);
195ssize_t vfio_pci_core_do_io_rw(struct vfio_pci_core_device *vdev, bool test_mem,
196 void __iomem *io, char __user *buf,
197 loff_t off, size_t count, size_t x_start,
198 size_t x_end, bool iswrite,
199 enum vfio_pci_io_width max_width);
200bool __vfio_pci_memory_enabled(struct vfio_pci_core_device *vdev);
201bool vfio_pci_core_range_intersect_range(loff_t buf_start, size_t buf_cnt,
202 loff_t reg_start, size_t reg_cnt,
203 loff_t *buf_offset,
204 size_t *intersect_count,
205 size_t *register_offset);
206#define VFIO_IOWRITE_DECLARATION(size) \
207int vfio_pci_core_iowrite##size(struct vfio_pci_core_device *vdev, \
208 bool test_mem, u##size val, void __iomem *io);
209
210VFIO_IOWRITE_DECLARATION(8)
211VFIO_IOWRITE_DECLARATION(16)
212VFIO_IOWRITE_DECLARATION(32)
213#ifdef iowrite64
214VFIO_IOWRITE_DECLARATION(64)
215#endif
216
217#define VFIO_IOREAD_DECLARATION(size) \
218int vfio_pci_core_ioread##size(struct vfio_pci_core_device *vdev, \
219 bool test_mem, u##size *val, void __iomem *io);
220
221VFIO_IOREAD_DECLARATION(8)
222VFIO_IOREAD_DECLARATION(16)
223VFIO_IOREAD_DECLARATION(32)
224#ifdef ioread64
225VFIO_IOREAD_DECLARATION(64)
226#endif
227
228static inline bool is_aligned_for_order(struct vm_area_struct *vma,
229 unsigned long addr,
230 unsigned long pfn,
231 unsigned int order)
232{
233 return !(order && (addr < vma->vm_start ||
234 addr + (PAGE_SIZE << order) > vma->vm_end ||
235 !IS_ALIGNED(pfn, 1 << order)));
236}
237
238int vfio_pci_dma_buf_iommufd_map(struct dma_buf_attachment *attachment,
239 struct dma_buf_phys_vec *phys);
240
241#endif /* VFIO_PCI_CORE_H */