1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Copyright (C) 2009-2010 Advanced Micro Devices, Inc.
4 * Author: Joerg Roedel <jroedel@suse.de>
5 */
6
7 #ifndef AMD_IOMMU_H
8 #define AMD_IOMMU_H
9
10 #include <linux/iommu.h>
11
12 #include "amd_iommu_types.h"
13
14 extern int amd_iommu_get_num_iommus(void);
15 extern int amd_iommu_init_dma_ops(void);
16 extern int amd_iommu_init_passthrough(void);
17 extern irqreturn_t amd_iommu_int_thread(int irq, void *data);
18 extern irqreturn_t amd_iommu_int_handler(int irq, void *data);
19 extern void amd_iommu_apply_erratum_63(u16 devid);
20 extern void amd_iommu_restart_event_logging(struct amd_iommu *iommu);
21 extern void amd_iommu_reset_cmd_buffer(struct amd_iommu *iommu);
22 extern int amd_iommu_init_devices(void);
23 extern void amd_iommu_uninit_devices(void);
24 extern void amd_iommu_init_notifier(void);
25 extern int amd_iommu_init_api(void);
26
27 #ifdef CONFIG_AMD_IOMMU_DEBUGFS
28 void amd_iommu_debugfs_setup(struct amd_iommu *iommu);
29 #else
amd_iommu_debugfs_setup(struct amd_iommu * iommu)30 static inline void amd_iommu_debugfs_setup(struct amd_iommu *iommu) {}
31 #endif
32
33 /* Needed for interrupt remapping */
34 extern int amd_iommu_prepare(void);
35 extern int amd_iommu_enable(void);
36 extern void amd_iommu_disable(void);
37 extern int amd_iommu_reenable(int);
38 extern int amd_iommu_enable_faulting(void);
39 extern int amd_iommu_guest_ir;
40
41 /* IOMMUv2 specific functions */
42 struct iommu_domain;
43
44 extern bool amd_iommu_v2_supported(void);
45 extern struct amd_iommu *get_amd_iommu(unsigned int idx);
46 extern u8 amd_iommu_pc_get_max_banks(unsigned int idx);
47 extern bool amd_iommu_pc_supported(void);
48 extern u8 amd_iommu_pc_get_max_counters(unsigned int idx);
49 extern int amd_iommu_pc_get_reg(struct amd_iommu *iommu, u8 bank, u8 cntr,
50 u8 fxn, u64 *value);
51 extern int amd_iommu_pc_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr,
52 u8 fxn, u64 *value);
53
54 extern int amd_iommu_register_ppr_notifier(struct notifier_block *nb);
55 extern int amd_iommu_unregister_ppr_notifier(struct notifier_block *nb);
56 extern void amd_iommu_domain_direct_map(struct iommu_domain *dom);
57 extern int amd_iommu_domain_enable_v2(struct iommu_domain *dom, int pasids);
58 extern int amd_iommu_flush_page(struct iommu_domain *dom, u32 pasid,
59 u64 address);
60 extern int amd_iommu_flush_tlb(struct iommu_domain *dom, u32 pasid);
61 extern int amd_iommu_domain_set_gcr3(struct iommu_domain *dom, u32 pasid,
62 unsigned long cr3);
63 extern int amd_iommu_domain_clear_gcr3(struct iommu_domain *dom, u32 pasid);
64 extern struct iommu_domain *amd_iommu_get_v2_domain(struct pci_dev *pdev);
65
66 #ifdef CONFIG_IRQ_REMAP
67 extern int amd_iommu_create_irq_domain(struct amd_iommu *iommu);
68 #else
amd_iommu_create_irq_domain(struct amd_iommu * iommu)69 static inline int amd_iommu_create_irq_domain(struct amd_iommu *iommu)
70 {
71 return 0;
72 }
73 #endif
74
75 #define PPR_SUCCESS 0x0
76 #define PPR_INVALID 0x1
77 #define PPR_FAILURE 0xf
78
79 extern int amd_iommu_complete_ppr(struct pci_dev *pdev, u32 pasid,
80 int status, int tag);
81
is_rd890_iommu(struct pci_dev * pdev)82 static inline bool is_rd890_iommu(struct pci_dev *pdev)
83 {
84 return (pdev->vendor == PCI_VENDOR_ID_ATI) &&
85 (pdev->device == PCI_DEVICE_ID_RD890_IOMMU);
86 }
87
iommu_feature(struct amd_iommu * iommu,u64 mask)88 static inline bool iommu_feature(struct amd_iommu *iommu, u64 mask)
89 {
90 return !!(iommu->features & mask);
91 }
92
iommu_virt_to_phys(void * vaddr)93 static inline u64 iommu_virt_to_phys(void *vaddr)
94 {
95 return (u64)__sme_set(virt_to_phys(vaddr));
96 }
97
iommu_phys_to_virt(unsigned long paddr)98 static inline void *iommu_phys_to_virt(unsigned long paddr)
99 {
100 return phys_to_virt(__sme_clr(paddr));
101 }
102
103 extern bool translation_pre_enabled(struct amd_iommu *iommu);
104 extern bool amd_iommu_is_attach_deferred(struct iommu_domain *domain,
105 struct device *dev);
106 extern int __init add_special_device(u8 type, u8 id, u16 *devid,
107 bool cmd_line);
108
109 #ifdef CONFIG_DMI
110 void amd_iommu_apply_ivrs_quirks(void);
111 #else
amd_iommu_apply_ivrs_quirks(void)112 static inline void amd_iommu_apply_ivrs_quirks(void) { }
113 #endif
114
115 #endif
116