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    Subject[PATCH 3/9] add frontend implementation for the IOMMU API
    Date
    Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
    ---
    drivers/base/iommu.c | 94 ++++++++++++++++++++++++++++++++++++++++++++++++++
    1 files changed, 94 insertions(+), 0 deletions(-)
    create mode 100644 drivers/base/iommu.c

    diff --git a/drivers/base/iommu.c b/drivers/base/iommu.c
    new file mode 100644
    index 0000000..7250b9c
    --- /dev/null
    +++ b/drivers/base/iommu.c
    @@ -0,0 +1,94 @@
    +/*
    + * Copyright (C) 2007-2008 Advanced Micro Devices, Inc.
    + * Author: Joerg Roedel <joerg.roedel@amd.com>
    + *
    + * 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, write to the Free Software
    + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
    + */
    +
    +#include <linux/bug.h>
    +#include <linux/types.h>
    +#include <linux/errno.h>
    +#include <linux/iommu.h>
    +
    +static struct iommu_ops *iommu_ops;
    +
    +void register_iommu(struct iommu_ops *ops)
    +{
    + if (iommu_ops)
    + BUG();
    +
    + iommu_ops = ops;
    +}
    +
    +bool iommu_found()
    +{
    + return iommu_ops != NULL;
    +}
    +EXPORT_SYMBOL_GPL(iommu_found);
    +
    +struct iommu_domain *iommu_domain_alloc(struct device *dev)
    +{
    + struct iommu_domain *domain;
    + int ret;
    +
    + domain = kmalloc(sizeof(*domain), GFP_KERNEL);
    + if (!domain)
    + return NULL;
    +
    + ret = iommu_ops->domain_init(domain, dev);
    + if (ret)
    + goto out_free;
    +
    + return domain;
    +
    +out_free:
    + kfree(domain);
    +
    + return NULL;
    +}
    +EXPORT_SYMBOL_GPL(iommu_domain_alloc);
    +
    +void iommu_domain_free(struct iommu_domain *domain)
    +{
    + iommu_ops->domain_destroy(domain);
    + kfree(domain);
    +}
    +EXPORT_SYMBOL_GPL(iommu_domain_free);
    +
    +int iommu_attach_device(struct iommu_domain *domain, struct device *dev)
    +{
    + return iommu_ops->attach_dev(domain, dev);
    +}
    +EXPORT_SYMBOL_GPL(iommu_attach_device);
    +
    +void iommu_detach_device(struct iommu_domain *domain, struct device *dev)
    +{
    + iommu_ops->detach_dev(domain, dev);
    +}
    +EXPORT_SYMBOL_GPL(iommu_detach_device);
    +
    +int iommu_map_address(struct iommu_domain *domain,
    + dma_addr_t iova, phys_addr_t paddr,
    + size_t size, int prot)
    +{
    + return iommu_ops->map(domain, iova, paddr, size, prot);
    +}
    +EXPORT_SYMBOL_GPL(iommu_map_address);
    +
    +phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain,
    + dma_addr_t iova)
    +{
    + return iommu_ops->iova_to_phys(domain, iova);
    +}
    +EXPORT_SYMBOL_GPL(iommu_iova_to_phys);
    --
    1.5.6.4



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