forked from Minki/linux
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>
92 lines
2.1 KiB
C
92 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2013 Red Hat
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* Author: Rob Clark <robdclark@gmail.com>
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*/
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#include "msm_drv.h"
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#include "msm_mmu.h"
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struct msm_iommu {
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struct msm_mmu base;
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struct iommu_domain *domain;
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};
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#define to_msm_iommu(x) container_of(x, struct msm_iommu, base)
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static int msm_fault_handler(struct iommu_domain *domain, struct device *dev,
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unsigned long iova, int flags, void *arg)
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{
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struct msm_iommu *iommu = arg;
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if (iommu->base.handler)
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return iommu->base.handler(iommu->base.arg, iova, flags);
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pr_warn_ratelimited("*** fault: iova=%08lx, flags=%d\n", iova, flags);
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return 0;
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}
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static int msm_iommu_attach(struct msm_mmu *mmu, const char * const *names,
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int cnt)
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{
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struct msm_iommu *iommu = to_msm_iommu(mmu);
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return iommu_attach_device(iommu->domain, mmu->dev);
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}
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static void msm_iommu_detach(struct msm_mmu *mmu, const char * const *names,
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int cnt)
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{
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struct msm_iommu *iommu = to_msm_iommu(mmu);
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iommu_detach_device(iommu->domain, mmu->dev);
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}
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static int msm_iommu_map(struct msm_mmu *mmu, uint64_t iova,
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struct sg_table *sgt, unsigned len, int prot)
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{
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struct msm_iommu *iommu = to_msm_iommu(mmu);
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size_t ret;
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ret = iommu_map_sg(iommu->domain, iova, sgt->sgl, sgt->nents, prot);
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WARN_ON(!ret);
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return (ret == len) ? 0 : -EINVAL;
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}
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static int msm_iommu_unmap(struct msm_mmu *mmu, uint64_t iova, unsigned len)
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{
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struct msm_iommu *iommu = to_msm_iommu(mmu);
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iommu_unmap(iommu->domain, iova, len);
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return 0;
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}
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static void msm_iommu_destroy(struct msm_mmu *mmu)
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{
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struct msm_iommu *iommu = to_msm_iommu(mmu);
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iommu_domain_free(iommu->domain);
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kfree(iommu);
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}
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static const struct msm_mmu_funcs funcs = {
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.attach = msm_iommu_attach,
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.detach = msm_iommu_detach,
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.map = msm_iommu_map,
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.unmap = msm_iommu_unmap,
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.destroy = msm_iommu_destroy,
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};
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struct msm_mmu *msm_iommu_new(struct device *dev, struct iommu_domain *domain)
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{
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struct msm_iommu *iommu;
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iommu = kzalloc(sizeof(*iommu), GFP_KERNEL);
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if (!iommu)
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return ERR_PTR(-ENOMEM);
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iommu->domain = domain;
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msm_mmu_init(&iommu->base, dev, &funcs);
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iommu_set_fault_handler(domain, msm_fault_handler, iommu);
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return &iommu->base;
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}
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