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iommu: Move iommu fault data to linux/iommu.h

The iommu fault data is currently defined in uapi/linux/iommu.h, but is only used inside the iommu subsystem. Move it to linux/iommu.h, where it will be more accessible to kernel drivers. With this done, uapi/linux/iommu.h becomes empty and can be removed from the tree.

Lu Baolu committed 2 years ago

Commit 00a9bc61 parent 84e6f563 files · +151 −163Browse files

Showing the changes to include/uapi (1 of 3 files). Show all

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include/uapi/linux/iommu.h+0−161
@@ -1,161 +0,0 @@
1−/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2−/*
3− * IOMMU user API definitions
4− */
5−
6−#ifndef _UAPI_IOMMU_H
7−#define _UAPI_IOMMU_H
8−
9−#include <linux/types.h>
10−
11−#define IOMMU_FAULT_PERM_READ (1 << 0) /* read */
12−#define IOMMU_FAULT_PERM_WRITE (1 << 1) /* write */
13−#define IOMMU_FAULT_PERM_EXEC (1 << 2) /* exec */
14−#define IOMMU_FAULT_PERM_PRIV (1 << 3) /* privileged */
15−
16−/* Generic fault types, can be expanded IRQ remapping fault */
17−enum iommu_fault_type {
18− IOMMU_FAULT_DMA_UNRECOV = 1, /* unrecoverable fault */
19− IOMMU_FAULT_PAGE_REQ, /* page request fault */
20−};
21−
22−enum iommu_fault_reason {
23− IOMMU_FAULT_REASON_UNKNOWN = 0,
24−
25− /* Could not access the PASID table (fetch caused external abort) */
26− IOMMU_FAULT_REASON_PASID_FETCH,
27−
28− /* PASID entry is invalid or has configuration errors */
29− IOMMU_FAULT_REASON_BAD_PASID_ENTRY,
30−
31− /*
32− * PASID is out of range (e.g. exceeds the maximum PASID
33− * supported by the IOMMU) or disabled.
34− */
35− IOMMU_FAULT_REASON_PASID_INVALID,
36−
37− /*
38− * An external abort occurred fetching (or updating) a translation
39− * table descriptor
40− */
41− IOMMU_FAULT_REASON_WALK_EABT,
42−
43− /*
44− * Could not access the page table entry (Bad address),
45− * actual translation fault
46− */
47− IOMMU_FAULT_REASON_PTE_FETCH,
48−
49− /* Protection flag check failed */
50− IOMMU_FAULT_REASON_PERMISSION,
51−
52− /* access flag check failed */
53− IOMMU_FAULT_REASON_ACCESS,
54−
55− /* Output address of a translation stage caused Address Size fault */
56− IOMMU_FAULT_REASON_OOR_ADDRESS,
57−};
58−
59−/**
60− * struct iommu_fault_unrecoverable - Unrecoverable fault data
61− * @reason: reason of the fault, from &enum iommu_fault_reason
62− * @flags: parameters of this fault (IOMMU_FAULT_UNRECOV_* values)
63− * @pasid: Process Address Space ID
64− * @perm: requested permission access using by the incoming transaction
65− * (IOMMU_FAULT_PERM_* values)
66− * @addr: offending page address
67− * @fetch_addr: address that caused a fetch abort, if any
68− */
69−struct iommu_fault_unrecoverable {
70− __u32 reason;
71−#define IOMMU_FAULT_UNRECOV_PASID_VALID (1 << 0)
72−#define IOMMU_FAULT_UNRECOV_ADDR_VALID (1 << 1)
73−#define IOMMU_FAULT_UNRECOV_FETCH_ADDR_VALID (1 << 2)
74− __u32 flags;
75− __u32 pasid;
76− __u32 perm;
77− __u64 addr;
78− __u64 fetch_addr;
79−};
80−
81−/**
82− * struct iommu_fault_page_request - Page Request data
83− * @flags: encodes whether the corresponding fields are valid and whether this
84− * is the last page in group (IOMMU_FAULT_PAGE_REQUEST_* values).
85− * When IOMMU_FAULT_PAGE_RESPONSE_NEEDS_PASID is set, the page response
86− * must have the same PASID value as the page request. When it is clear,
87− * the page response should not have a PASID.
88− * @pasid: Process Address Space ID
89− * @grpid: Page Request Group Index
90− * @perm: requested page permissions (IOMMU_FAULT_PERM_* values)
91− * @addr: page address
92− * @private_data: device-specific private information
93− */
94−struct iommu_fault_page_request {
95−#define IOMMU_FAULT_PAGE_REQUEST_PASID_VALID (1 << 0)
96−#define IOMMU_FAULT_PAGE_REQUEST_LAST_PAGE (1 << 1)
97−#define IOMMU_FAULT_PAGE_REQUEST_PRIV_DATA (1 << 2)
98−#define IOMMU_FAULT_PAGE_RESPONSE_NEEDS_PASID (1 << 3)
99− __u32 flags;
100− __u32 pasid;
101− __u32 grpid;
102− __u32 perm;
103− __u64 addr;
104− __u64 private_data[2];
105−};
106−
107−/**
108− * struct iommu_fault - Generic fault data
109− * @type: fault type from &enum iommu_fault_type
110− * @padding: reserved for future use (should be zero)
111− * @event: fault event, when @type is %IOMMU_FAULT_DMA_UNRECOV
112− * @prm: Page Request message, when @type is %IOMMU_FAULT_PAGE_REQ
113− * @padding2: sets the fault size to allow for future extensions
114− */
115−struct iommu_fault {
116− __u32 type;
117− __u32 padding;
118− union {
119− struct iommu_fault_unrecoverable event;
120− struct iommu_fault_page_request prm;
121− __u8 padding2[56];
122− };
123−};
124−
125−/**
126− * enum iommu_page_response_code - Return status of fault handlers
127− * @IOMMU_PAGE_RESP_SUCCESS: Fault has been handled and the page tables
128− * populated, retry the access. This is "Success" in PCI PRI.
129− * @IOMMU_PAGE_RESP_FAILURE: General error. Drop all subsequent faults from
130− * this device if possible. This is "Response Failure" in PCI PRI.
131− * @IOMMU_PAGE_RESP_INVALID: Could not handle this fault, don't retry the
132− * access. This is "Invalid Request" in PCI PRI.
133− */
134−enum iommu_page_response_code {
135− IOMMU_PAGE_RESP_SUCCESS = 0,
136− IOMMU_PAGE_RESP_INVALID,
137− IOMMU_PAGE_RESP_FAILURE,
138−};
139−
140−/**
141− * struct iommu_page_response - Generic page response information
142− * @argsz: User filled size of this data
143− * @version: API version of this structure
144− * @flags: encodes whether the corresponding fields are valid
145− * (IOMMU_FAULT_PAGE_RESPONSE_* values)
146− * @pasid: Process Address Space ID
147− * @grpid: Page Request Group Index
148− * @code: response code from &enum iommu_page_response_code
149− */
150−struct iommu_page_response {
151− __u32 argsz;
152−#define IOMMU_PAGE_RESP_VERSION_1 1
153− __u32 version;
154−#define IOMMU_PAGE_RESP_PASID_VALID (1 << 0)
155− __u32 flags;
156− __u32 pasid;
157− __u32 grpid;
158− __u32 code;
159−};
160−
161−#endif /* _UAPI_IOMMU_H */

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