1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Copyright (C) 2007-2010 Advanced Micro Devices, Inc.
4 * Author: Joerg Roedel <joerg.roedel@amd.com>
5 * Leo Duran <leo.duran@amd.com>
6 */
7
8 #ifndef _ASM_X86_AMD_IOMMU_H
9 #define _ASM_X86_AMD_IOMMU_H
10
11 #include <linux/types.h>
12
13 struct amd_iommu;
14
15 /*
16 * This is mainly used to communicate information back-and-forth
17 * between SVM and IOMMU for setting up and tearing down posted
18 * interrupt
19 */
20 struct amd_iommu_pi_data {
21 u32 ga_tag;
22 u32 prev_ga_tag;
23 u64 base;
24 bool is_guest_mode;
25 struct vcpu_data *vcpu_data;
26 void *ir_data;
27 };
28
29 #ifdef CONFIG_AMD_IOMMU
30
31 struct task_struct;
32 struct pci_dev;
33
34 extern int amd_iommu_detect(void);
35
36 #else /* CONFIG_AMD_IOMMU */
37
38 static inline int amd_iommu_detect(void) { return -ENODEV; }
39
40 #endif /* CONFIG_AMD_IOMMU */
41
42 #if defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP)
43
44 /* IOMMU AVIC Function */
45 extern int amd_iommu_register_ga_log_notifier(int (*notifier)(u32));
46
47 extern int
48 amd_iommu_update_ga(int cpu, bool is_run, void *data);
49
50 extern int amd_iommu_activate_guest_mode(void *data);
51 extern int amd_iommu_deactivate_guest_mode(void *data);
52
53 #else /* defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP) */
54
55 static inline int
56 amd_iommu_register_ga_log_notifier(int (*notifier)(u32))
57 {
58 return 0;
59 }
60
61 static inline int
62 amd_iommu_update_ga(int cpu, bool is_run, void *data)
63 {
64 return 0;
65 }
66
67 static inline int amd_iommu_activate_guest_mode(void *data)
68 {
69 return 0;
70 }
71
72 static inline int amd_iommu_deactivate_guest_mode(void *data)
73 {
74 return 0;
75 }
76 #endif /* defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP) */
77
78 int amd_iommu_get_num_iommus(void);
79 bool amd_iommu_pc_supported(void);
80 u8 amd_iommu_pc_get_max_banks(unsigned int idx);
81 u8 amd_iommu_pc_get_max_counters(unsigned int idx);
82 int amd_iommu_pc_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn,
83 u64 *value);
84 int amd_iommu_pc_get_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn,
85 u64 *value);
86 struct amd_iommu *get_amd_iommu(unsigned int idx);
87
88 #ifdef CONFIG_KVM_AMD_SEV
89 int amd_iommu_snp_disable(void);
90 #else
91 static inline int amd_iommu_snp_disable(void) { return 0; }
92 #endif
93
94 #endif /* _ASM_X86_AMD_IOMMU_H */
95
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