tjh.dev
Linux kernel mirror (for testing)
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linux
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
14irqreturn_t amd_iommu_int_thread(int irq, void *data);
15irqreturn_t amd_iommu_int_thread_evtlog(int irq, void *data);
16irqreturn_t amd_iommu_int_thread_pprlog(int irq, void *data);
17irqreturn_t amd_iommu_int_thread_galog(int irq, void *data);
18irqreturn_t amd_iommu_int_handler(int irq, void *data);
19void amd_iommu_apply_erratum_63(struct amd_iommu *iommu, u16 devid);
20void amd_iommu_restart_log(struct amd_iommu *iommu, const char *evt_type,
21 u8 cntrl_intr, u8 cntrl_log,
22 u32 status_run_mask, u32 status_overflow_mask);
23void amd_iommu_restart_event_logging(struct amd_iommu *iommu);
24void amd_iommu_restart_ga_log(struct amd_iommu *iommu);
25void amd_iommu_restart_ppr_log(struct amd_iommu *iommu);
26void amd_iommu_set_rlookup_table(struct amd_iommu *iommu, u16 devid);
27void iommu_feature_enable(struct amd_iommu *iommu, u8 bit);
28void *__init iommu_alloc_4k_pages(struct amd_iommu *iommu,
29 gfp_t gfp, size_t size);
30
31#ifdef CONFIG_AMD_IOMMU_DEBUGFS
32void amd_iommu_debugfs_setup(struct amd_iommu *iommu);
33#else
34static inline void amd_iommu_debugfs_setup(struct amd_iommu *iommu) {}
35#endif
36
37/* Needed for interrupt remapping */
38int amd_iommu_prepare(void);
39int amd_iommu_enable(void);
40void amd_iommu_disable(void);
41int amd_iommu_reenable(int mode);
42int amd_iommu_enable_faulting(unsigned int cpu);
43extern int amd_iommu_guest_ir;
44extern enum io_pgtable_fmt amd_iommu_pgtable;
45extern int amd_iommu_gpt_level;
46extern unsigned long amd_iommu_pgsize_bitmap;
47
48/* Protection domain ops */
49void amd_iommu_init_identity_domain(void);
50struct protection_domain *protection_domain_alloc(unsigned int type, int nid);
51void protection_domain_free(struct protection_domain *domain);
52struct iommu_domain *amd_iommu_domain_alloc_sva(struct device *dev,
53 struct mm_struct *mm);
54void amd_iommu_domain_free(struct iommu_domain *dom);
55int iommu_sva_set_dev_pasid(struct iommu_domain *domain,
56 struct device *dev, ioasid_t pasid,
57 struct iommu_domain *old);
58void amd_iommu_remove_dev_pasid(struct device *dev, ioasid_t pasid,
59 struct iommu_domain *domain);
60
61/* SVA/PASID */
62bool amd_iommu_pasid_supported(void);
63
64/* IOPF */
65int amd_iommu_iopf_init(struct amd_iommu *iommu);
66void amd_iommu_iopf_uninit(struct amd_iommu *iommu);
67void amd_iommu_page_response(struct device *dev, struct iopf_fault *evt,
68 struct iommu_page_response *resp);
69int amd_iommu_iopf_add_device(struct amd_iommu *iommu,
70 struct iommu_dev_data *dev_data);
71void amd_iommu_iopf_remove_device(struct amd_iommu *iommu,
72 struct iommu_dev_data *dev_data);
73
74/* GCR3 setup */
75int amd_iommu_set_gcr3(struct iommu_dev_data *dev_data,
76 ioasid_t pasid, unsigned long gcr3);
77int amd_iommu_clear_gcr3(struct iommu_dev_data *dev_data, ioasid_t pasid);
78
79/* PPR */
80int __init amd_iommu_alloc_ppr_log(struct amd_iommu *iommu);
81void __init amd_iommu_free_ppr_log(struct amd_iommu *iommu);
82void amd_iommu_enable_ppr_log(struct amd_iommu *iommu);
83void amd_iommu_poll_ppr_log(struct amd_iommu *iommu);
84int amd_iommu_complete_ppr(struct device *dev, u32 pasid, int status, int tag);
85
86/*
87 * This function flushes all internal caches of
88 * the IOMMU used by this driver.
89 */
90void amd_iommu_flush_all_caches(struct amd_iommu *iommu);
91void amd_iommu_update_and_flush_device_table(struct protection_domain *domain);
92void amd_iommu_domain_update(struct protection_domain *domain);
93void amd_iommu_domain_flush_pages(struct protection_domain *domain,
94 u64 address, size_t size);
95void amd_iommu_dev_flush_pasid_pages(struct iommu_dev_data *dev_data,
96 ioasid_t pasid, u64 address, size_t size);
97
98#ifdef CONFIG_IRQ_REMAP
99int amd_iommu_create_irq_domain(struct amd_iommu *iommu);
100#else
101static inline int amd_iommu_create_irq_domain(struct amd_iommu *iommu)
102{
103 return 0;
104}
105#endif
106
107static inline bool is_rd890_iommu(struct pci_dev *pdev)
108{
109 return (pdev->vendor == PCI_VENDOR_ID_ATI) &&
110 (pdev->device == PCI_DEVICE_ID_RD890_IOMMU);
111}
112
113static inline bool check_feature(u64 mask)
114{
115 return (amd_iommu_efr & mask);
116}
117
118static inline bool check_feature2(u64 mask)
119{
120 return (amd_iommu_efr2 & mask);
121}
122
123static inline bool amd_iommu_v2_pgtbl_supported(void)
124{
125 return (check_feature(FEATURE_GIOSUP) && check_feature(FEATURE_GT));
126}
127
128static inline bool amd_iommu_gt_ppr_supported(void)
129{
130 return (amd_iommu_v2_pgtbl_supported() &&
131 check_feature(FEATURE_PPR) &&
132 check_feature(FEATURE_EPHSUP));
133}
134
135static inline u64 iommu_virt_to_phys(void *vaddr)
136{
137 return (u64)__sme_set(virt_to_phys(vaddr));
138}
139
140static inline void *iommu_phys_to_virt(unsigned long paddr)
141{
142 return phys_to_virt(__sme_clr(paddr));
143}
144
145static inline int get_pci_sbdf_id(struct pci_dev *pdev)
146{
147 int seg = pci_domain_nr(pdev->bus);
148 u16 devid = pci_dev_id(pdev);
149
150 return PCI_SEG_DEVID_TO_SBDF(seg, devid);
151}
152
153/*
154 * This must be called after device probe completes. During probe
155 * use rlookup_amd_iommu() get the iommu.
156 */
157static inline struct amd_iommu *get_amd_iommu_from_dev(struct device *dev)
158{
159 return iommu_get_iommu_dev(dev, struct amd_iommu, iommu);
160}
161
162/* This must be called after device probe completes. */
163static inline struct amd_iommu *get_amd_iommu_from_dev_data(struct iommu_dev_data *dev_data)
164{
165 return iommu_get_iommu_dev(dev_data->dev, struct amd_iommu, iommu);
166}
167
168static inline struct protection_domain *to_pdomain(struct iommu_domain *dom)
169{
170 return container_of(dom, struct protection_domain, domain);
171}
172
173bool translation_pre_enabled(struct amd_iommu *iommu);
174int __init add_special_device(u8 type, u8 id, u32 *devid, bool cmd_line);
175
176#ifdef CONFIG_DMI
177void amd_iommu_apply_ivrs_quirks(void);
178#else
179static inline void amd_iommu_apply_ivrs_quirks(void) { }
180#endif
181
182void amd_iommu_domain_set_pgtable(struct protection_domain *domain,
183 u64 *root, int mode);
184struct dev_table_entry *get_dev_table(struct amd_iommu *iommu);
185
186#endif