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caab277b1d
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not see http www gnu org licenses extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 503 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Enrico Weigelt <info@metux.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190602204653.811534538@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
71 lines
1.6 KiB
C
71 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Generic page table allocator for IOMMUs.
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*
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* Copyright (C) 2014 ARM Limited
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*
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* Author: Will Deacon <will.deacon@arm.com>
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*/
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#include <linux/bug.h>
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#include <linux/io-pgtable.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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static const struct io_pgtable_init_fns *
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io_pgtable_init_table[IO_PGTABLE_NUM_FMTS] = {
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#ifdef CONFIG_IOMMU_IO_PGTABLE_LPAE
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[ARM_32_LPAE_S1] = &io_pgtable_arm_32_lpae_s1_init_fns,
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[ARM_32_LPAE_S2] = &io_pgtable_arm_32_lpae_s2_init_fns,
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[ARM_64_LPAE_S1] = &io_pgtable_arm_64_lpae_s1_init_fns,
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[ARM_64_LPAE_S2] = &io_pgtable_arm_64_lpae_s2_init_fns,
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[ARM_MALI_LPAE] = &io_pgtable_arm_mali_lpae_init_fns,
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#endif
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#ifdef CONFIG_IOMMU_IO_PGTABLE_ARMV7S
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[ARM_V7S] = &io_pgtable_arm_v7s_init_fns,
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#endif
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};
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struct io_pgtable_ops *alloc_io_pgtable_ops(enum io_pgtable_fmt fmt,
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struct io_pgtable_cfg *cfg,
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void *cookie)
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{
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struct io_pgtable *iop;
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const struct io_pgtable_init_fns *fns;
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if (fmt >= IO_PGTABLE_NUM_FMTS)
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return NULL;
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fns = io_pgtable_init_table[fmt];
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if (!fns)
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return NULL;
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iop = fns->alloc(cfg, cookie);
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if (!iop)
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return NULL;
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iop->fmt = fmt;
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iop->cookie = cookie;
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iop->cfg = *cfg;
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return &iop->ops;
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}
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EXPORT_SYMBOL_GPL(alloc_io_pgtable_ops);
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/*
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* It is the IOMMU driver's responsibility to ensure that the page table
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* is no longer accessible to the walker by this point.
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*/
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void free_io_pgtable_ops(struct io_pgtable_ops *ops)
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{
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struct io_pgtable *iop;
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if (!ops)
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return;
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iop = container_of(ops, struct io_pgtable, ops);
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io_pgtable_tlb_flush_all(iop);
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io_pgtable_init_table[iop->fmt]->free(iop);
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}
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EXPORT_SYMBOL_GPL(free_io_pgtable_ops);
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