/*
+ * IOMMU API for MTK architected m4u v1 implementations
+ *
* Copyright (c) 2015-2016 MediaTek Inc.
* Author: Honghui Zhang <honghui.zhang@mediatek.com>
*
#include <linux/spinlock.h>
#include <asm/barrier.h>
#include <asm/dma-iommu.h>
-#include <linux/module.h>
+#include <linux/init.h>
#include <dt-bindings/memory/mt2701-larb-port.h>
#include <soc/mediatek/smi.h>
#include "mtk_iommu.h"
{
struct mtk_smi_larb_iommu *larb_mmu;
unsigned int larbid, portid;
- struct iommu_fwspec *fwspec = dev->iommu_fwspec;
+ struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
int i;
for (i = 0; i < fwspec->num_ids; ++i) {
struct device *dev)
{
struct mtk_iommu_domain *dom = to_mtk_domain(domain);
- struct mtk_iommu_data *data = dev->iommu_fwspec->iommu_priv;
+ struct mtk_iommu_data *data = dev_iommu_fwspec_get(dev)->iommu_priv;
int ret;
if (!data)
static void mtk_iommu_detach_device(struct iommu_domain *domain,
struct device *dev)
{
- struct mtk_iommu_data *data = dev->iommu_fwspec->iommu_priv;
+ struct mtk_iommu_data *data = dev_iommu_fwspec_get(dev)->iommu_priv;
if (!data)
return;
return pa;
}
-static struct iommu_ops mtk_iommu_ops;
+static const struct iommu_ops mtk_iommu_ops;
/*
* MTK generation one iommu HW only support one iommu domain, and all the client
static int mtk_iommu_create_mapping(struct device *dev,
struct of_phandle_args *args)
{
+ struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct mtk_iommu_data *data;
struct platform_device *m4updev;
struct dma_iommu_mapping *mtk_mapping;
return -EINVAL;
}
- if (!dev->iommu_fwspec) {
+ if (!fwspec) {
ret = iommu_fwspec_init(dev, &args->np->fwnode, &mtk_iommu_ops);
if (ret)
return ret;
- } else if (dev->iommu_fwspec->ops != &mtk_iommu_ops) {
+ fwspec = dev_iommu_fwspec_get(dev);
+ } else if (dev_iommu_fwspec_get(dev)->ops != &mtk_iommu_ops) {
return -EINVAL;
}
- if (!dev->iommu_fwspec->iommu_priv) {
+ if (!fwspec->iommu_priv) {
/* Get the m4u device */
m4updev = of_find_device_by_node(args->np);
if (WARN_ON(!m4updev))
return -EINVAL;
- dev->iommu_fwspec->iommu_priv = platform_get_drvdata(m4updev);
+ fwspec->iommu_priv = platform_get_drvdata(m4updev);
}
ret = iommu_fwspec_add_ids(dev, args->args, 1);
if (ret)
return ret;
- data = dev->iommu_fwspec->iommu_priv;
+ data = fwspec->iommu_priv;
m4udev = data->dev;
mtk_mapping = m4udev->archdata.iommu;
if (!mtk_mapping) {
static int mtk_iommu_add_device(struct device *dev)
{
+ struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct dma_iommu_mapping *mtk_mapping;
struct of_phandle_args iommu_spec;
struct of_phandle_iterator it;
of_node_put(iommu_spec.np);
}
- if (!dev->iommu_fwspec || dev->iommu_fwspec->ops != &mtk_iommu_ops)
+ if (!fwspec || fwspec->ops != &mtk_iommu_ops)
return -ENODEV; /* Not a iommu client device */
/*
if (err)
return err;
- data = dev->iommu_fwspec->iommu_priv;
+ data = fwspec->iommu_priv;
mtk_mapping = data->dev->archdata.iommu;
err = arm_iommu_attach_device(dev, mtk_mapping);
if (err) {
static void mtk_iommu_remove_device(struct device *dev)
{
+ struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct mtk_iommu_data *data;
- if (!dev->iommu_fwspec || dev->iommu_fwspec->ops != &mtk_iommu_ops)
+ if (!fwspec || fwspec->ops != &mtk_iommu_ops)
return;
- data = dev->iommu_fwspec->iommu_priv;
+ data = fwspec->iommu_priv;
iommu_device_unlink(&data->iommu, dev);
iommu_group_remove_device(dev);
return 0;
}
-static struct iommu_ops mtk_iommu_ops = {
+static const struct iommu_ops mtk_iommu_ops = {
.domain_alloc = mtk_iommu_domain_alloc,
.domain_free = mtk_iommu_domain_free,
.attach_dev = mtk_iommu_attach_device,
{
return platform_driver_register(&mtk_iommu_driver);
}
-
-static void __exit m4u_exit(void)
-{
- return platform_driver_unregister(&mtk_iommu_driver);
-}
-
subsys_initcall(m4u_init);
-module_exit(m4u_exit);
-
-MODULE_DESCRIPTION("IOMMU API for MTK architected m4u v1 implementations");
-MODULE_AUTHOR("Honghui Zhang <honghui.zhang@mediatek.com>");
-MODULE_LICENSE("GPL v2");