From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- drivers/iommu/io-pgtable.c | 78 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) create mode 100644 drivers/iommu/io-pgtable.c (limited to 'drivers/iommu/io-pgtable.c') diff --git a/drivers/iommu/io-pgtable.c b/drivers/iommu/io-pgtable.c new file mode 100644 index 000000000..b843fcd36 --- /dev/null +++ b/drivers/iommu/io-pgtable.c @@ -0,0 +1,78 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Generic page table allocator for IOMMUs. + * + * Copyright (C) 2014 ARM Limited + * + * Author: Will Deacon + */ + +#include +#include +#include +#include + +static const struct io_pgtable_init_fns * +io_pgtable_init_table[IO_PGTABLE_NUM_FMTS] = { +#ifdef CONFIG_IOMMU_IO_PGTABLE_LPAE + [ARM_32_LPAE_S1] = &io_pgtable_arm_32_lpae_s1_init_fns, + [ARM_32_LPAE_S2] = &io_pgtable_arm_32_lpae_s2_init_fns, + [ARM_64_LPAE_S1] = &io_pgtable_arm_64_lpae_s1_init_fns, + [ARM_64_LPAE_S2] = &io_pgtable_arm_64_lpae_s2_init_fns, + [ARM_MALI_LPAE] = &io_pgtable_arm_mali_lpae_init_fns, +#endif +#ifdef CONFIG_IOMMU_IO_PGTABLE_DART + [APPLE_DART] = &io_pgtable_apple_dart_init_fns, + [APPLE_DART2] = &io_pgtable_apple_dart_init_fns, +#endif +#ifdef CONFIG_IOMMU_IO_PGTABLE_ARMV7S + [ARM_V7S] = &io_pgtable_arm_v7s_init_fns, +#endif +#ifdef CONFIG_AMD_IOMMU + [AMD_IOMMU_V1] = &io_pgtable_amd_iommu_v1_init_fns, + [AMD_IOMMU_V2] = &io_pgtable_amd_iommu_v2_init_fns, +#endif +}; + +struct io_pgtable_ops *alloc_io_pgtable_ops(enum io_pgtable_fmt fmt, + struct io_pgtable_cfg *cfg, + void *cookie) +{ + struct io_pgtable *iop; + const struct io_pgtable_init_fns *fns; + + if (fmt >= IO_PGTABLE_NUM_FMTS) + return NULL; + + fns = io_pgtable_init_table[fmt]; + if (!fns) + return NULL; + + iop = fns->alloc(cfg, cookie); + if (!iop) + return NULL; + + iop->fmt = fmt; + iop->cookie = cookie; + iop->cfg = *cfg; + + return &iop->ops; +} +EXPORT_SYMBOL_GPL(alloc_io_pgtable_ops); + +/* + * It is the IOMMU driver's responsibility to ensure that the page table + * is no longer accessible to the walker by this point. + */ +void free_io_pgtable_ops(struct io_pgtable_ops *ops) +{ + struct io_pgtable *iop; + + if (!ops) + return; + + iop = io_pgtable_ops_to_pgtable(ops); + io_pgtable_tlb_flush_all(iop); + io_pgtable_init_table[iop->fmt]->free(iop); +} +EXPORT_SYMBOL_GPL(free_io_pgtable_ops); -- cgit v1.2.3