Commit | Line | Data |
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1b69be5e GS |
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/uaccess.h> | |
13 | #include <linux/vfio.h> | |
14 | #include <asm/eeh.h> | |
15 | ||
16 | /* We might build address mapping here for "fast" path later */ | |
17 | int vfio_spapr_pci_eeh_open(struct pci_dev *pdev) | |
18 | { | |
19 | return eeh_dev_open(pdev); | |
20 | } | |
21 | ||
22 | void vfio_spapr_pci_eeh_release(struct pci_dev *pdev) | |
23 | { | |
24 | eeh_dev_release(pdev); | |
25 | } | |
26 | ||
27 | long vfio_spapr_iommu_eeh_ioctl(struct iommu_group *group, | |
28 | unsigned int cmd, unsigned long arg) | |
29 | { | |
30 | struct eeh_pe *pe; | |
31 | struct vfio_eeh_pe_op op; | |
32 | unsigned long minsz; | |
33 | long ret = -EINVAL; | |
34 | ||
35 | switch (cmd) { | |
36 | case VFIO_CHECK_EXTENSION: | |
37 | if (arg == VFIO_EEH) | |
38 | ret = eeh_enabled() ? 1 : 0; | |
39 | else | |
40 | ret = 0; | |
41 | break; | |
42 | case VFIO_EEH_PE_OP: | |
43 | pe = eeh_iommu_group_to_pe(group); | |
44 | if (!pe) | |
45 | return -ENODEV; | |
46 | ||
47 | minsz = offsetofend(struct vfio_eeh_pe_op, op); | |
48 | if (copy_from_user(&op, (void __user *)arg, minsz)) | |
49 | return -EFAULT; | |
50 | if (op.argsz < minsz || op.flags) | |
51 | return -EINVAL; | |
52 | ||
53 | switch (op.op) { | |
54 | case VFIO_EEH_PE_DISABLE: | |
55 | ret = eeh_pe_set_option(pe, EEH_OPT_DISABLE); | |
56 | break; | |
57 | case VFIO_EEH_PE_ENABLE: | |
58 | ret = eeh_pe_set_option(pe, EEH_OPT_ENABLE); | |
59 | break; | |
60 | case VFIO_EEH_PE_UNFREEZE_IO: | |
61 | ret = eeh_pe_set_option(pe, EEH_OPT_THAW_MMIO); | |
62 | break; | |
63 | case VFIO_EEH_PE_UNFREEZE_DMA: | |
64 | ret = eeh_pe_set_option(pe, EEH_OPT_THAW_DMA); | |
65 | break; | |
66 | case VFIO_EEH_PE_GET_STATE: | |
67 | ret = eeh_pe_get_state(pe); | |
68 | break; | |
69 | case VFIO_EEH_PE_RESET_DEACTIVATE: | |
70 | ret = eeh_pe_reset(pe, EEH_RESET_DEACTIVATE); | |
71 | break; | |
72 | case VFIO_EEH_PE_RESET_HOT: | |
73 | ret = eeh_pe_reset(pe, EEH_RESET_HOT); | |
74 | break; | |
75 | case VFIO_EEH_PE_RESET_FUNDAMENTAL: | |
76 | ret = eeh_pe_reset(pe, EEH_RESET_FUNDAMENTAL); | |
77 | break; | |
78 | case VFIO_EEH_PE_CONFIGURE: | |
79 | ret = eeh_pe_configure(pe); | |
80 | break; | |
81 | default: | |
82 | ret = -EINVAL; | |
83 | } | |
84 | } | |
85 | ||
86 | return ret; | |
87 | } |