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
14extern int amd_iommu_get_num_iommus(void);
15extern int amd_iommu_init_dma_ops(void);
16extern int amd_iommu_init_passthrough(void);
17extern irqreturn_t amd_iommu_int_thread(int irq, void *data);
18extern irqreturn_t amd_iommu_int_handler(int irq, void *data);
19extern void amd_iommu_apply_erratum_63(u16 devid);
20extern void amd_iommu_restart_event_logging(struct amd_iommu *iommu);
21extern void amd_iommu_reset_cmd_buffer(struct amd_iommu *iommu);
22extern int amd_iommu_init_devices(void);
23extern void amd_iommu_uninit_devices(void);
24extern void amd_iommu_init_notifier(void);
25extern int amd_iommu_init_api(void);
26
27#ifdef CONFIG_AMD_IOMMU_DEBUGFS
28void amd_iommu_debugfs_setup(struct amd_iommu *iommu);
29#else
30static inline void amd_iommu_debugfs_setup(struct amd_iommu *iommu) {}
31#endif
32
33/* Needed for interrupt remapping */
34extern int amd_iommu_prepare(void);
35extern int amd_iommu_enable(void);
36extern void amd_iommu_disable(void);
37extern int amd_iommu_reenable(int);
38extern int amd_iommu_enable_faulting(void);
39extern int amd_iommu_guest_ir;
40
41/* IOMMUv2 specific functions */
42struct iommu_domain;
43
44extern bool amd_iommu_v2_supported(void);
45extern struct amd_iommu *get_amd_iommu(unsigned int idx);
46extern u8 amd_iommu_pc_get_max_banks(unsigned int idx);
47extern bool amd_iommu_pc_supported(void);
48extern u8 amd_iommu_pc_get_max_counters(unsigned int idx);
49extern int amd_iommu_pc_get_reg(struct amd_iommu *iommu, u8 bank, u8 cntr,
50				u8 fxn, u64 *value);
51extern int amd_iommu_pc_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr,
52				u8 fxn, u64 *value);
53
54extern int amd_iommu_register_ppr_notifier(struct notifier_block *nb);
55extern int amd_iommu_unregister_ppr_notifier(struct notifier_block *nb);
56extern void amd_iommu_domain_direct_map(struct iommu_domain *dom);
57extern int amd_iommu_domain_enable_v2(struct iommu_domain *dom, int pasids);
58extern int amd_iommu_flush_page(struct iommu_domain *dom, u32 pasid,
59				u64 address);
60extern int amd_iommu_flush_tlb(struct iommu_domain *dom, u32 pasid);
61extern int amd_iommu_domain_set_gcr3(struct iommu_domain *dom, u32 pasid,
62				     unsigned long cr3);
63extern int amd_iommu_domain_clear_gcr3(struct iommu_domain *dom, u32 pasid);
64extern struct iommu_domain *amd_iommu_get_v2_domain(struct pci_dev *pdev);
65
66#ifdef CONFIG_IRQ_REMAP
67extern int amd_iommu_create_irq_domain(struct amd_iommu *iommu);
68#else
69static 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
79extern int amd_iommu_complete_ppr(struct pci_dev *pdev, u32 pasid,
80				  int status, int tag);
81
82static 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
88static inline bool iommu_feature(struct amd_iommu *iommu, u64 mask)
89{
90	return !!(iommu->features & mask);
91}
92
93static inline u64 iommu_virt_to_phys(void *vaddr)
94{
95	return (u64)__sme_set(virt_to_phys(vaddr));
96}
97
98static inline void *iommu_phys_to_virt(unsigned long paddr)
99{
100	return phys_to_virt(__sme_clr(paddr));
101}
102
103extern bool translation_pre_enabled(struct amd_iommu *iommu);
104extern bool amd_iommu_is_attach_deferred(struct iommu_domain *domain,
105					 struct device *dev);
106extern int __init add_special_device(u8 type, u8 id, u16 *devid,
107				     bool cmd_line);
108
109#ifdef CONFIG_DMI
110void amd_iommu_apply_ivrs_quirks(void);
111#else
112static inline void amd_iommu_apply_ivrs_quirks(void) { }
113#endif
114
115#endif
116