1caab277bSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
2fdb1d7beSWill Deacon /*
3fdb1d7beSWill Deacon * Generic page table allocator for IOMMUs.
4fdb1d7beSWill Deacon *
5fdb1d7beSWill Deacon * Copyright (C) 2014 ARM Limited
6fdb1d7beSWill Deacon *
7fdb1d7beSWill Deacon * Author: Will Deacon <will.deacon@arm.com>
8fdb1d7beSWill Deacon */
9fdb1d7beSWill Deacon
10fdb1d7beSWill Deacon #include <linux/bug.h>
11b77cf11fSRob Herring #include <linux/io-pgtable.h>
12fdb1d7beSWill Deacon #include <linux/kernel.h>
13fdb1d7beSWill Deacon #include <linux/types.h>
14fdb1d7beSWill Deacon
15fdb1d7beSWill Deacon static const struct io_pgtable_init_fns *
1654c6d242SCosmin-Gabriel Samoila io_pgtable_init_table[IO_PGTABLE_NUM_FMTS] = {
17e1d3c0fdSWill Deacon #ifdef CONFIG_IOMMU_IO_PGTABLE_LPAE
18e1d3c0fdSWill Deacon [ARM_32_LPAE_S1] = &io_pgtable_arm_32_lpae_s1_init_fns,
19e1d3c0fdSWill Deacon [ARM_32_LPAE_S2] = &io_pgtable_arm_32_lpae_s2_init_fns,
20e1d3c0fdSWill Deacon [ARM_64_LPAE_S1] = &io_pgtable_arm_64_lpae_s1_init_fns,
21e1d3c0fdSWill Deacon [ARM_64_LPAE_S2] = &io_pgtable_arm_64_lpae_s2_init_fns,
22d08d42deSRob Herring [ARM_MALI_LPAE] = &io_pgtable_arm_mali_lpae_init_fns,
23745ef109SJanne Grunau #endif
24745ef109SJanne Grunau #ifdef CONFIG_IOMMU_IO_PGTABLE_DART
25892384cdSSven Peter [APPLE_DART] = &io_pgtable_apple_dart_init_fns,
26*dc09fe1cSSven Peter [APPLE_DART2] = &io_pgtable_apple_dart_init_fns,
27e1d3c0fdSWill Deacon #endif
28e5fc9753SRobin Murphy #ifdef CONFIG_IOMMU_IO_PGTABLE_ARMV7S
29e5fc9753SRobin Murphy [ARM_V7S] = &io_pgtable_arm_v7s_init_fns,
30e5fc9753SRobin Murphy #endif
31c9b258c6SSuravee Suthikulpanit #ifdef CONFIG_AMD_IOMMU
32c9b258c6SSuravee Suthikulpanit [AMD_IOMMU_V1] = &io_pgtable_amd_iommu_v1_init_fns,
33c9b258c6SSuravee Suthikulpanit [AMD_IOMMU_V2] = &io_pgtable_amd_iommu_v2_init_fns,
34fdb1d7beSWill Deacon #endif
35fdb1d7beSWill Deacon };
36fdb1d7beSWill Deacon
alloc_io_pgtable_ops(enum io_pgtable_fmt fmt,struct io_pgtable_cfg * cfg,void * cookie)37fdb1d7beSWill Deacon struct io_pgtable_ops *alloc_io_pgtable_ops(enum io_pgtable_fmt fmt,
38fdb1d7beSWill Deacon struct io_pgtable_cfg *cfg,
39fdb1d7beSWill Deacon void *cookie)
40fdb1d7beSWill Deacon {
41fdb1d7beSWill Deacon struct io_pgtable *iop;
42fdb1d7beSWill Deacon const struct io_pgtable_init_fns *fns;
43fdb1d7beSWill Deacon
44fdb1d7beSWill Deacon if (fmt >= IO_PGTABLE_NUM_FMTS)
45fdb1d7beSWill Deacon return NULL;
46fdb1d7beSWill Deacon
47fdb1d7beSWill Deacon fns = io_pgtable_init_table[fmt];
48fdb1d7beSWill Deacon if (!fns)
49fdb1d7beSWill Deacon return NULL;
50fdb1d7beSWill Deacon
51fdb1d7beSWill Deacon iop = fns->alloc(cfg, cookie);
52fdb1d7beSWill Deacon if (!iop)
53fdb1d7beSWill Deacon return NULL;
54fdb1d7beSWill Deacon
55fdb1d7beSWill Deacon iop->fmt = fmt;
56fdb1d7beSWill Deacon iop->cookie = cookie;
57fdb1d7beSWill Deacon iop->cfg = *cfg;
58fdb1d7beSWill Deacon
59fdb1d7beSWill Deacon return &iop->ops;
60b77cf11fSRob Herring }
61fdb1d7beSWill Deacon EXPORT_SYMBOL_GPL(alloc_io_pgtable_ops);
62fdb1d7beSWill Deacon
63fdb1d7beSWill Deacon /*
64fdb1d7beSWill Deacon * It is the IOMMU driver's responsibility to ensure that the page table
65fdb1d7beSWill Deacon * is no longer accessible to the walker by this point.
66fdb1d7beSWill Deacon */
free_io_pgtable_ops(struct io_pgtable_ops * ops)67fdb1d7beSWill Deacon void free_io_pgtable_ops(struct io_pgtable_ops *ops)
68fdb1d7beSWill Deacon {
69fdb1d7beSWill Deacon struct io_pgtable *iop;
70fdb1d7beSWill Deacon
71fdb1d7beSWill Deacon if (!ops)
72fdb1d7beSWill Deacon return;
73fb485eb1SRobin Murphy
74507e4c9dSRobin Murphy iop = io_pgtable_ops_to_pgtable(ops);
75fdb1d7beSWill Deacon io_pgtable_tlb_flush_all(iop);
76fdb1d7beSWill Deacon io_pgtable_init_table[iop->fmt]->free(iop);
77b77cf11fSRob Herring }
78 EXPORT_SYMBOL_GPL(free_io_pgtable_ops);
79