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45051539 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
c6da992e | 2 | /* |
5d0d7156 | 3 | * Copyright (C) 2007-2010 Advanced Micro Devices, Inc. |
c6da992e JR |
4 | * Author: Joerg Roedel <joerg.roedel@amd.com> |
5 | * Leo Duran <leo.duran@amd.com> | |
c6da992e JR |
6 | */ |
7 | ||
1965aae3 PA |
8 | #ifndef _ASM_X86_AMD_IOMMU_H |
9 | #define _ASM_X86_AMD_IOMMU_H | |
c6da992e | 10 | |
ed96f228 | 11 | #include <linux/types.h> |
c6da992e | 12 | |
b9fc6b56 SS |
13 | /* |
14 | * This is mainly used to communicate information back-and-forth | |
15 | * between SVM and IOMMU for setting up and tearing down posted | |
16 | * interrupt | |
17 | */ | |
18 | struct amd_iommu_pi_data { | |
19 | u32 ga_tag; | |
20 | u32 prev_ga_tag; | |
21 | u64 base; | |
22 | bool is_guest_mode; | |
23 | struct vcpu_data *vcpu_data; | |
24 | void *ir_data; | |
25 | }; | |
26 | ||
c6da992e | 27 | #ifdef CONFIG_AMD_IOMMU |
6a9401a7 | 28 | |
2d5503b6 | 29 | struct task_struct; |
ed96f228 JR |
30 | struct pci_dev; |
31 | ||
480125ba | 32 | extern int amd_iommu_detect(void); |
8704a1ba | 33 | extern int amd_iommu_init_hardware(void); |
6a113ddc JR |
34 | |
35 | /** | |
36 | * amd_iommu_enable_device_erratum() - Enable erratum workaround for device | |
37 | * in the IOMMUv2 driver | |
38 | * @pdev: The PCI device the workaround is necessary for | |
39 | * @erratum: The erratum workaround to enable | |
40 | * | |
ed96f228 | 41 | * The function needs to be called before amd_iommu_init_device(). |
6a113ddc JR |
42 | * Possible values for the erratum number are for now: |
43 | * - AMD_PRI_DEV_ERRATUM_ENABLE_RESET - Reset PRI capability when PRI | |
44 | * is enabled | |
45 | * - AMD_PRI_DEV_ERRATUM_LIMIT_REQ_ONE - Limit number of outstanding PRI | |
46 | * requests to one | |
47 | */ | |
48 | #define AMD_PRI_DEV_ERRATUM_ENABLE_RESET 0 | |
49 | #define AMD_PRI_DEV_ERRATUM_LIMIT_REQ_ONE 1 | |
50 | ||
51 | extern void amd_iommu_enable_device_erratum(struct pci_dev *pdev, u32 erratum); | |
52 | ||
ed96f228 JR |
53 | /** |
54 | * amd_iommu_init_device() - Init device for use with IOMMUv2 driver | |
55 | * @pdev: The PCI device to initialize | |
56 | * @pasids: Number of PASIDs to support for this device | |
57 | * | |
58 | * This function does all setup for the device pdev so that it can be | |
59 | * used with IOMMUv2. | |
60 | * Returns 0 on success or negative value on error. | |
61 | */ | |
62 | extern int amd_iommu_init_device(struct pci_dev *pdev, int pasids); | |
63 | ||
64 | /** | |
65 | * amd_iommu_free_device() - Free all IOMMUv2 related device resources | |
66 | * and disable IOMMUv2 usage for this device | |
67 | * @pdev: The PCI device to disable IOMMUv2 usage for' | |
68 | */ | |
69 | extern void amd_iommu_free_device(struct pci_dev *pdev); | |
70 | ||
2d5503b6 JR |
71 | /** |
72 | * amd_iommu_bind_pasid() - Bind a given task to a PASID on a device | |
73 | * @pdev: The PCI device to bind the task to | |
74 | * @pasid: The PASID on the device the task should be bound to | |
75 | * @task: the task to bind | |
76 | * | |
77 | * The function returns 0 on success or a negative value on error. | |
78 | */ | |
79 | extern int amd_iommu_bind_pasid(struct pci_dev *pdev, int pasid, | |
80 | struct task_struct *task); | |
81 | ||
82 | /** | |
83 | * amd_iommu_unbind_pasid() - Unbind a PASID from its task on | |
84 | * a device | |
85 | * @pdev: The device of the PASID | |
86 | * @pasid: The PASID to unbind | |
87 | * | |
88 | * When this function returns the device is no longer using the PASID | |
89 | * and the PASID is no longer bound to its task. | |
90 | */ | |
91 | extern void amd_iommu_unbind_pasid(struct pci_dev *pdev, int pasid); | |
92 | ||
175d6146 JR |
93 | /** |
94 | * amd_iommu_set_invalid_ppr_cb() - Register a call-back for failed | |
95 | * PRI requests | |
96 | * @pdev: The PCI device the call-back should be registered for | |
97 | * @cb: The call-back function | |
98 | * | |
99 | * The IOMMUv2 driver invokes this call-back when it is unable to | |
100 | * successfully handle a PRI request. The device driver can then decide | |
101 | * which PRI response the device should see. Possible return values for | |
102 | * the call-back are: | |
103 | * | |
104 | * - AMD_IOMMU_INV_PRI_RSP_SUCCESS - Send SUCCESS back to the device | |
105 | * - AMD_IOMMU_INV_PRI_RSP_INVALID - Send INVALID back to the device | |
106 | * - AMD_IOMMU_INV_PRI_RSP_FAIL - Send Failure back to the device, | |
107 | * the device is required to disable | |
108 | * PRI when it receives this response | |
109 | * | |
110 | * The function returns 0 on success or negative value on error. | |
111 | */ | |
112 | #define AMD_IOMMU_INV_PRI_RSP_SUCCESS 0 | |
113 | #define AMD_IOMMU_INV_PRI_RSP_INVALID 1 | |
114 | #define AMD_IOMMU_INV_PRI_RSP_FAIL 2 | |
115 | ||
116 | typedef int (*amd_iommu_invalid_ppr_cb)(struct pci_dev *pdev, | |
117 | int pasid, | |
118 | unsigned long address, | |
119 | u16); | |
120 | ||
121 | extern int amd_iommu_set_invalid_ppr_cb(struct pci_dev *pdev, | |
122 | amd_iommu_invalid_ppr_cb cb); | |
123 | ||
51499aa9 AS |
124 | #define PPR_FAULT_EXEC (1 << 1) |
125 | #define PPR_FAULT_READ (1 << 2) | |
126 | #define PPR_FAULT_WRITE (1 << 5) | |
127 | #define PPR_FAULT_USER (1 << 6) | |
128 | #define PPR_FAULT_RSVD (1 << 7) | |
129 | #define PPR_FAULT_GN (1 << 8) | |
130 | ||
52efdb89 JR |
131 | /** |
132 | * amd_iommu_device_info() - Get information about IOMMUv2 support of a | |
133 | * PCI device | |
134 | * @pdev: PCI device to query information from | |
135 | * @info: A pointer to an amd_iommu_device_info structure which will contain | |
136 | * the information about the PCI device | |
137 | * | |
138 | * Returns 0 on success, negative value on error | |
139 | */ | |
140 | ||
141 | #define AMD_IOMMU_DEVICE_FLAG_ATS_SUP 0x1 /* ATS feature supported */ | |
142 | #define AMD_IOMMU_DEVICE_FLAG_PRI_SUP 0x2 /* PRI feature supported */ | |
143 | #define AMD_IOMMU_DEVICE_FLAG_PASID_SUP 0x4 /* PASID context supported */ | |
144 | #define AMD_IOMMU_DEVICE_FLAG_EXEC_SUP 0x8 /* Device may request execution | |
145 | on memory pages */ | |
146 | #define AMD_IOMMU_DEVICE_FLAG_PRIV_SUP 0x10 /* Device may request | |
147 | super-user privileges */ | |
148 | ||
149 | struct amd_iommu_device_info { | |
150 | int max_pasids; | |
151 | u32 flags; | |
152 | }; | |
153 | ||
154 | extern int amd_iommu_device_info(struct pci_dev *pdev, | |
155 | struct amd_iommu_device_info *info); | |
156 | ||
bc21662f JR |
157 | /** |
158 | * amd_iommu_set_invalidate_ctx_cb() - Register a call-back for invalidating | |
159 | * a pasid context. This call-back is | |
160 | * invoked when the IOMMUv2 driver needs to | |
161 | * invalidate a PASID context, for example | |
162 | * because the task that is bound to that | |
163 | * context is about to exit. | |
164 | * | |
165 | * @pdev: The PCI device the call-back should be registered for | |
166 | * @cb: The call-back function | |
167 | */ | |
168 | ||
169 | typedef void (*amd_iommu_invalidate_ctx)(struct pci_dev *pdev, int pasid); | |
170 | ||
171 | extern int amd_iommu_set_invalidate_ctx_cb(struct pci_dev *pdev, | |
172 | amd_iommu_invalidate_ctx cb); | |
bd6fcefc | 173 | #else /* CONFIG_AMD_IOMMU */ |
6a9401a7 | 174 | |
480125ba | 175 | static inline int amd_iommu_detect(void) { return -ENODEV; } |
6a9401a7 | 176 | |
bd6fcefc SS |
177 | #endif /* CONFIG_AMD_IOMMU */ |
178 | ||
179 | #if defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP) | |
180 | ||
181 | /* IOMMU AVIC Function */ | |
182 | extern int amd_iommu_register_ga_log_notifier(int (*notifier)(u32)); | |
183 | ||
8dbea3fd SS |
184 | extern int |
185 | amd_iommu_update_ga(int cpu, bool is_run, void *data); | |
186 | ||
bd6fcefc SS |
187 | #else /* defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP) */ |
188 | ||
189 | static inline int | |
190 | amd_iommu_register_ga_log_notifier(int (*notifier)(u32)) | |
191 | { | |
192 | return 0; | |
193 | } | |
194 | ||
8dbea3fd SS |
195 | static inline int |
196 | amd_iommu_update_ga(int cpu, bool is_run, void *data) | |
197 | { | |
198 | return 0; | |
199 | } | |
200 | ||
bd6fcefc | 201 | #endif /* defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP) */ |
c6da992e | 202 | |
1965aae3 | 203 | #endif /* _ASM_X86_AMD_IOMMU_H */ |