tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: MIT
2/*
3 * Copyright © 2025 Intel Corporation
4 */
5
6#include <drm/intel/xe_sriov_vfio.h>
7#include <linux/cleanup.h>
8
9#include "xe_pci.h"
10#include "xe_pm.h"
11#include "xe_sriov_pf_control.h"
12#include "xe_sriov_pf_helpers.h"
13#include "xe_sriov_pf_migration.h"
14
15struct xe_device *xe_sriov_vfio_get_pf(struct pci_dev *pdev)
16{
17 return xe_pci_to_pf_device(pdev);
18}
19EXPORT_SYMBOL_FOR_MODULES(xe_sriov_vfio_get_pf, "xe-vfio-pci");
20
21bool xe_sriov_vfio_migration_supported(struct xe_device *xe)
22{
23 if (!IS_SRIOV_PF(xe))
24 return false;
25
26 return xe_sriov_pf_migration_supported(xe);
27}
28EXPORT_SYMBOL_FOR_MODULES(xe_sriov_vfio_migration_supported, "xe-vfio-pci");
29
30#define DEFINE_XE_SRIOV_VFIO_FUNCTION(_type, _func, _impl) \
31_type xe_sriov_vfio_##_func(struct xe_device *xe, unsigned int vfid) \
32{ \
33 if (!IS_SRIOV_PF(xe)) \
34 return -EPERM; \
35 if (vfid == PFID || vfid > xe_sriov_pf_num_vfs(xe)) \
36 return -EINVAL; \
37 \
38 guard(xe_pm_runtime_noresume)(xe); \
39 \
40 return xe_sriov_pf_##_impl(xe, vfid); \
41} \
42EXPORT_SYMBOL_FOR_MODULES(xe_sriov_vfio_##_func, "xe-vfio-pci")
43
44DEFINE_XE_SRIOV_VFIO_FUNCTION(int, wait_flr_done, control_wait_flr);
45DEFINE_XE_SRIOV_VFIO_FUNCTION(int, suspend_device, control_pause_vf);
46DEFINE_XE_SRIOV_VFIO_FUNCTION(int, resume_device, control_resume_vf);
47DEFINE_XE_SRIOV_VFIO_FUNCTION(int, stop_copy_enter, control_trigger_save_vf);
48DEFINE_XE_SRIOV_VFIO_FUNCTION(int, stop_copy_exit, control_finish_save_vf);
49DEFINE_XE_SRIOV_VFIO_FUNCTION(int, resume_data_enter, control_trigger_restore_vf);
50DEFINE_XE_SRIOV_VFIO_FUNCTION(int, resume_data_exit, control_finish_restore_vf);
51DEFINE_XE_SRIOV_VFIO_FUNCTION(int, error, control_stop_vf);
52DEFINE_XE_SRIOV_VFIO_FUNCTION(ssize_t, stop_copy_size, migration_size);
53
54ssize_t xe_sriov_vfio_data_read(struct xe_device *xe, unsigned int vfid,
55 char __user *buf, size_t len)
56{
57 if (!IS_SRIOV_PF(xe))
58 return -EPERM;
59 if (vfid == PFID || vfid > xe_sriov_pf_num_vfs(xe))
60 return -EINVAL;
61
62 guard(xe_pm_runtime_noresume)(xe);
63
64 return xe_sriov_pf_migration_read(xe, vfid, buf, len);
65}
66EXPORT_SYMBOL_FOR_MODULES(xe_sriov_vfio_data_read, "xe-vfio-pci");
67
68ssize_t xe_sriov_vfio_data_write(struct xe_device *xe, unsigned int vfid,
69 const char __user *buf, size_t len)
70{
71 if (!IS_SRIOV_PF(xe))
72 return -EPERM;
73 if (vfid == PFID || vfid > xe_sriov_pf_num_vfs(xe))
74 return -EINVAL;
75
76 guard(xe_pm_runtime_noresume)(xe);
77
78 return xe_sriov_pf_migration_write(xe, vfid, buf, len);
79}
80EXPORT_SYMBOL_FOR_MODULES(xe_sriov_vfio_data_write, "xe-vfio-pci");