Warning: That file was not part of the compilation database. It may have many parsing errors.

1/*
2 * EEH functionality support for VFIO devices. The feature is only
3 * available on sPAPR compatible platforms.
4 *
5 * Copyright Gavin Shan, IBM Corporation 2014.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12#include <linux/module.h>
13#include <linux/uaccess.h>
14#include <linux/vfio.h>
15#include <asm/eeh.h>
16
17#define DRIVER_VERSION "0.1"
18#define DRIVER_AUTHOR "Gavin Shan, IBM Corporation"
19#define DRIVER_DESC "VFIO IOMMU SPAPR EEH"
20
21/* We might build address mapping here for "fast" path later */
22void vfio_spapr_pci_eeh_open(struct pci_dev *pdev)
23{
24 eeh_dev_open(pdev);
25}
26EXPORT_SYMBOL_GPL(vfio_spapr_pci_eeh_open);
27
28void vfio_spapr_pci_eeh_release(struct pci_dev *pdev)
29{
30 eeh_dev_release(pdev);
31}
32EXPORT_SYMBOL_GPL(vfio_spapr_pci_eeh_release);
33
34long vfio_spapr_iommu_eeh_ioctl(struct iommu_group *group,
35 unsigned int cmd, unsigned long arg)
36{
37 struct eeh_pe *pe;
38 struct vfio_eeh_pe_op op;
39 unsigned long minsz;
40 long ret = -EINVAL;
41
42 switch (cmd) {
43 case VFIO_CHECK_EXTENSION:
44 if (arg == VFIO_EEH)
45 ret = eeh_enabled() ? 1 : 0;
46 else
47 ret = 0;
48 break;
49 case VFIO_EEH_PE_OP:
50 pe = eeh_iommu_group_to_pe(group);
51 if (!pe)
52 return -ENODEV;
53
54 minsz = offsetofend(struct vfio_eeh_pe_op, op);
55 if (copy_from_user(&op, (void __user *)arg, minsz))
56 return -EFAULT;
57 if (op.argsz < minsz || op.flags)
58 return -EINVAL;
59
60 switch (op.op) {
61 case VFIO_EEH_PE_DISABLE:
62 ret = eeh_pe_set_option(pe, EEH_OPT_DISABLE);
63 break;
64 case VFIO_EEH_PE_ENABLE:
65 ret = eeh_pe_set_option(pe, EEH_OPT_ENABLE);
66 break;
67 case VFIO_EEH_PE_UNFREEZE_IO:
68 ret = eeh_pe_set_option(pe, EEH_OPT_THAW_MMIO);
69 break;
70 case VFIO_EEH_PE_UNFREEZE_DMA:
71 ret = eeh_pe_set_option(pe, EEH_OPT_THAW_DMA);
72 break;
73 case VFIO_EEH_PE_GET_STATE:
74 ret = eeh_pe_get_state(pe);
75 break;
76 case VFIO_EEH_PE_RESET_DEACTIVATE:
77 ret = eeh_pe_reset(pe, EEH_RESET_DEACTIVATE, true);
78 break;
79 case VFIO_EEH_PE_RESET_HOT:
80 ret = eeh_pe_reset(pe, EEH_RESET_HOT, true);
81 break;
82 case VFIO_EEH_PE_RESET_FUNDAMENTAL:
83 ret = eeh_pe_reset(pe, EEH_RESET_FUNDAMENTAL, true);
84 break;
85 case VFIO_EEH_PE_CONFIGURE:
86 ret = eeh_pe_configure(pe);
87 break;
88 case VFIO_EEH_PE_INJECT_ERR:
89 minsz = offsetofend(struct vfio_eeh_pe_op, err.mask);
90 if (op.argsz < minsz)
91 return -EINVAL;
92 if (copy_from_user(&op, (void __user *)arg, minsz))
93 return -EFAULT;
94
95 ret = eeh_pe_inject_err(pe, op.err.type, op.err.func,
96 op.err.addr, op.err.mask);
97 break;
98 default:
99 ret = -EINVAL;
100 }
101 }
102
103 return ret;
104}
105EXPORT_SYMBOL_GPL(vfio_spapr_iommu_eeh_ioctl);
106
107MODULE_VERSION(DRIVER_VERSION);
108MODULE_LICENSE("GPL v2");
109MODULE_AUTHOR(DRIVER_AUTHOR);
110MODULE_DESCRIPTION(DRIVER_DESC);
111

Warning: That file was not part of the compilation database. It may have many parsing errors.