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c6da992e | 1 | /* |
5d0d7156 | 2 | * Copyright (C) 2007-2010 Advanced Micro Devices, Inc. |
c6da992e JR |
3 | * Author: Joerg Roedel <joerg.roedel@amd.com> |
4 | * Leo Duran <leo.duran@amd.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License version 2 as published | |
8 | * by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | */ | |
19 | ||
1965aae3 PA |
20 | #ifndef _ASM_X86_AMD_IOMMU_H |
21 | #define _ASM_X86_AMD_IOMMU_H | |
c6da992e | 22 | |
ed96f228 | 23 | #include <linux/types.h> |
c6da992e JR |
24 | |
25 | #ifdef CONFIG_AMD_IOMMU | |
6a9401a7 | 26 | |
2d5503b6 | 27 | struct task_struct; |
ed96f228 JR |
28 | struct pci_dev; |
29 | ||
480125ba | 30 | extern int amd_iommu_detect(void); |
8704a1ba | 31 | extern int amd_iommu_init_hardware(void); |
6a113ddc JR |
32 | |
33 | /** | |
34 | * amd_iommu_enable_device_erratum() - Enable erratum workaround for device | |
35 | * in the IOMMUv2 driver | |
36 | * @pdev: The PCI device the workaround is necessary for | |
37 | * @erratum: The erratum workaround to enable | |
38 | * | |
ed96f228 | 39 | * The function needs to be called before amd_iommu_init_device(). |
6a113ddc JR |
40 | * Possible values for the erratum number are for now: |
41 | * - AMD_PRI_DEV_ERRATUM_ENABLE_RESET - Reset PRI capability when PRI | |
42 | * is enabled | |
43 | * - AMD_PRI_DEV_ERRATUM_LIMIT_REQ_ONE - Limit number of outstanding PRI | |
44 | * requests to one | |
45 | */ | |
46 | #define AMD_PRI_DEV_ERRATUM_ENABLE_RESET 0 | |
47 | #define AMD_PRI_DEV_ERRATUM_LIMIT_REQ_ONE 1 | |
48 | ||
49 | extern void amd_iommu_enable_device_erratum(struct pci_dev *pdev, u32 erratum); | |
50 | ||
ed96f228 JR |
51 | /** |
52 | * amd_iommu_init_device() - Init device for use with IOMMUv2 driver | |
53 | * @pdev: The PCI device to initialize | |
54 | * @pasids: Number of PASIDs to support for this device | |
55 | * | |
56 | * This function does all setup for the device pdev so that it can be | |
57 | * used with IOMMUv2. | |
58 | * Returns 0 on success or negative value on error. | |
59 | */ | |
60 | extern int amd_iommu_init_device(struct pci_dev *pdev, int pasids); | |
61 | ||
62 | /** | |
63 | * amd_iommu_free_device() - Free all IOMMUv2 related device resources | |
64 | * and disable IOMMUv2 usage for this device | |
65 | * @pdev: The PCI device to disable IOMMUv2 usage for' | |
66 | */ | |
67 | extern void amd_iommu_free_device(struct pci_dev *pdev); | |
68 | ||
2d5503b6 JR |
69 | /** |
70 | * amd_iommu_bind_pasid() - Bind a given task to a PASID on a device | |
71 | * @pdev: The PCI device to bind the task to | |
72 | * @pasid: The PASID on the device the task should be bound to | |
73 | * @task: the task to bind | |
74 | * | |
75 | * The function returns 0 on success or a negative value on error. | |
76 | */ | |
77 | extern int amd_iommu_bind_pasid(struct pci_dev *pdev, int pasid, | |
78 | struct task_struct *task); | |
79 | ||
80 | /** | |
81 | * amd_iommu_unbind_pasid() - Unbind a PASID from its task on | |
82 | * a device | |
83 | * @pdev: The device of the PASID | |
84 | * @pasid: The PASID to unbind | |
85 | * | |
86 | * When this function returns the device is no longer using the PASID | |
87 | * and the PASID is no longer bound to its task. | |
88 | */ | |
89 | extern void amd_iommu_unbind_pasid(struct pci_dev *pdev, int pasid); | |
90 | ||
175d6146 JR |
91 | /** |
92 | * amd_iommu_set_invalid_ppr_cb() - Register a call-back for failed | |
93 | * PRI requests | |
94 | * @pdev: The PCI device the call-back should be registered for | |
95 | * @cb: The call-back function | |
96 | * | |
97 | * The IOMMUv2 driver invokes this call-back when it is unable to | |
98 | * successfully handle a PRI request. The device driver can then decide | |
99 | * which PRI response the device should see. Possible return values for | |
100 | * the call-back are: | |
101 | * | |
102 | * - AMD_IOMMU_INV_PRI_RSP_SUCCESS - Send SUCCESS back to the device | |
103 | * - AMD_IOMMU_INV_PRI_RSP_INVALID - Send INVALID back to the device | |
104 | * - AMD_IOMMU_INV_PRI_RSP_FAIL - Send Failure back to the device, | |
105 | * the device is required to disable | |
106 | * PRI when it receives this response | |
107 | * | |
108 | * The function returns 0 on success or negative value on error. | |
109 | */ | |
110 | #define AMD_IOMMU_INV_PRI_RSP_SUCCESS 0 | |
111 | #define AMD_IOMMU_INV_PRI_RSP_INVALID 1 | |
112 | #define AMD_IOMMU_INV_PRI_RSP_FAIL 2 | |
113 | ||
114 | typedef int (*amd_iommu_invalid_ppr_cb)(struct pci_dev *pdev, | |
115 | int pasid, | |
116 | unsigned long address, | |
117 | u16); | |
118 | ||
119 | extern int amd_iommu_set_invalid_ppr_cb(struct pci_dev *pdev, | |
120 | amd_iommu_invalid_ppr_cb cb); | |
121 | ||
51499aa9 AS |
122 | #define PPR_FAULT_EXEC (1 << 1) |
123 | #define PPR_FAULT_READ (1 << 2) | |
124 | #define PPR_FAULT_WRITE (1 << 5) | |
125 | #define PPR_FAULT_USER (1 << 6) | |
126 | #define PPR_FAULT_RSVD (1 << 7) | |
127 | #define PPR_FAULT_GN (1 << 8) | |
128 | ||
52efdb89 JR |
129 | /** |
130 | * amd_iommu_device_info() - Get information about IOMMUv2 support of a | |
131 | * PCI device | |
132 | * @pdev: PCI device to query information from | |
133 | * @info: A pointer to an amd_iommu_device_info structure which will contain | |
134 | * the information about the PCI device | |
135 | * | |
136 | * Returns 0 on success, negative value on error | |
137 | */ | |
138 | ||
139 | #define AMD_IOMMU_DEVICE_FLAG_ATS_SUP 0x1 /* ATS feature supported */ | |
140 | #define AMD_IOMMU_DEVICE_FLAG_PRI_SUP 0x2 /* PRI feature supported */ | |
141 | #define AMD_IOMMU_DEVICE_FLAG_PASID_SUP 0x4 /* PASID context supported */ | |
142 | #define AMD_IOMMU_DEVICE_FLAG_EXEC_SUP 0x8 /* Device may request execution | |
143 | on memory pages */ | |
144 | #define AMD_IOMMU_DEVICE_FLAG_PRIV_SUP 0x10 /* Device may request | |
145 | super-user privileges */ | |
146 | ||
147 | struct amd_iommu_device_info { | |
148 | int max_pasids; | |
149 | u32 flags; | |
150 | }; | |
151 | ||
152 | extern int amd_iommu_device_info(struct pci_dev *pdev, | |
153 | struct amd_iommu_device_info *info); | |
154 | ||
bc21662f JR |
155 | /** |
156 | * amd_iommu_set_invalidate_ctx_cb() - Register a call-back for invalidating | |
157 | * a pasid context. This call-back is | |
158 | * invoked when the IOMMUv2 driver needs to | |
159 | * invalidate a PASID context, for example | |
160 | * because the task that is bound to that | |
161 | * context is about to exit. | |
162 | * | |
163 | * @pdev: The PCI device the call-back should be registered for | |
164 | * @cb: The call-back function | |
165 | */ | |
166 | ||
167 | typedef void (*amd_iommu_invalidate_ctx)(struct pci_dev *pdev, int pasid); | |
168 | ||
169 | extern int amd_iommu_set_invalidate_ctx_cb(struct pci_dev *pdev, | |
170 | amd_iommu_invalidate_ctx cb); | |
171 | ||
c6da992e | 172 | #else |
6a9401a7 | 173 | |
480125ba | 174 | static inline int amd_iommu_detect(void) { return -ENODEV; } |
6a9401a7 | 175 | |
c6da992e JR |
176 | #endif |
177 | ||
1965aae3 | 178 | #endif /* _ASM_X86_AMD_IOMMU_H */ |