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path: root/drivers/iommu/mtk_iommu.c
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Diffstat (limited to 'drivers/iommu/mtk_iommu.c')
-rw-r--r--drivers/iommu/mtk_iommu.c85
1 files changed, 25 insertions, 60 deletions
diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index b12c12d74c33..1479c76ece9e 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -195,14 +195,14 @@ static irqreturn_t mtk_iommu_isr(int irq, void *dev_id)
static void mtk_iommu_config(struct mtk_iommu_data *data,
struct device *dev, bool enable)
{
- struct mtk_iommu_client_priv *head, *cur, *next;
struct mtk_smi_larb_iommu *larb_mmu;
unsigned int larbid, portid;
+ struct iommu_fwspec *fwspec = dev->iommu_fwspec;
+ int i;
- head = dev->archdata.iommu;
- list_for_each_entry_safe(cur, next, &head->client, client) {
- larbid = MTK_M4U_TO_LARB(cur->mtk_m4u_id);
- portid = MTK_M4U_TO_PORT(cur->mtk_m4u_id);
+ for (i = 0; i < fwspec->num_ids; ++i) {
+ larbid = MTK_M4U_TO_LARB(fwspec->ids[i]);
+ portid = MTK_M4U_TO_PORT(fwspec->ids[i]);
larb_mmu = &data->smi_imu.larb_imu[larbid];
dev_dbg(dev, "%s iommu port: %d\n",
@@ -282,14 +282,12 @@ static int mtk_iommu_attach_device(struct iommu_domain *domain,
struct device *dev)
{
struct mtk_iommu_domain *dom = to_mtk_domain(domain);
- struct mtk_iommu_client_priv *priv = dev->archdata.iommu;
- struct mtk_iommu_data *data;
+ struct mtk_iommu_data *data = dev->iommu_fwspec->iommu_priv;
int ret;
- if (!priv)
+ if (!data)
return -ENODEV;
- data = dev_get_drvdata(priv->m4udev);
if (!data->m4u_dom) {
data->m4u_dom = dom;
ret = mtk_iommu_domain_finalise(data);
@@ -310,13 +308,11 @@ static int mtk_iommu_attach_device(struct iommu_domain *domain,
static void mtk_iommu_detach_device(struct iommu_domain *domain,
struct device *dev)
{
- struct mtk_iommu_client_priv *priv = dev->archdata.iommu;
- struct mtk_iommu_data *data;
+ struct mtk_iommu_data *data = dev->iommu_fwspec->iommu_priv;
- if (!priv)
+ if (!data)
return;
- data = dev_get_drvdata(priv->m4udev);
mtk_iommu_config(data, dev, false);
}
@@ -366,8 +362,8 @@ static int mtk_iommu_add_device(struct device *dev)
{
struct iommu_group *group;
- if (!dev->archdata.iommu) /* Not a iommu client device */
- return -ENODEV;
+ if (!dev->iommu_fwspec || dev->iommu_fwspec->ops != &mtk_iommu_ops)
+ return -ENODEV; /* Not a iommu client device */
group = iommu_group_get_for_dev(dev);
if (IS_ERR(group))
@@ -379,44 +375,33 @@ static int mtk_iommu_add_device(struct device *dev)
static void mtk_iommu_remove_device(struct device *dev)
{
- struct mtk_iommu_client_priv *head, *cur, *next;
-
- head = dev->archdata.iommu;
- if (!head)
+ if (!dev->iommu_fwspec || dev->iommu_fwspec->ops != &mtk_iommu_ops)
return;
- list_for_each_entry_safe(cur, next, &head->client, client) {
- list_del(&cur->client);
- kfree(cur);
- }
- kfree(head);
- dev->archdata.iommu = NULL;
-
iommu_group_remove_device(dev);
+ iommu_fwspec_free(dev);
}
static struct iommu_group *mtk_iommu_device_group(struct device *dev)
{
- struct mtk_iommu_data *data;
- struct mtk_iommu_client_priv *priv;
+ struct mtk_iommu_data *data = dev->iommu_fwspec->iommu_priv;
- priv = dev->archdata.iommu;
- if (!priv)
+ if (!data)
return ERR_PTR(-ENODEV);
/* All the client devices are in the same m4u iommu-group */
- data = dev_get_drvdata(priv->m4udev);
if (!data->m4u_group) {
data->m4u_group = iommu_group_alloc();
if (IS_ERR(data->m4u_group))
dev_err(dev, "Failed to allocate M4U IOMMU group\n");
+ } else {
+ iommu_group_ref_get(data->m4u_group);
}
return data->m4u_group;
}
static int mtk_iommu_of_xlate(struct device *dev, struct of_phandle_args *args)
{
- struct mtk_iommu_client_priv *head, *priv, *next;
struct platform_device *m4updev;
if (args->args_count != 1) {
@@ -425,38 +410,16 @@ static int mtk_iommu_of_xlate(struct device *dev, struct of_phandle_args *args)
return -EINVAL;
}
- if (!dev->archdata.iommu) {
+ if (!dev->iommu_fwspec->iommu_priv) {
/* Get the m4u device */
m4updev = of_find_device_by_node(args->np);
if (WARN_ON(!m4updev))
return -EINVAL;
- head = kzalloc(sizeof(*head), GFP_KERNEL);
- if (!head)
- return -ENOMEM;
-
- dev->archdata.iommu = head;
- INIT_LIST_HEAD(&head->client);
- head->m4udev = &m4updev->dev;
- } else {
- head = dev->archdata.iommu;
+ dev->iommu_fwspec->iommu_priv = platform_get_drvdata(m4updev);
}
- priv = kzalloc(sizeof(*priv), GFP_KERNEL);
- if (!priv)
- goto err_free_mem;
-
- priv->mtk_m4u_id = args->args[0];
- list_add_tail(&priv->client, &head->client);
-
- return 0;
-
-err_free_mem:
- list_for_each_entry_safe(priv, next, &head->client, client)
- kfree(priv);
- kfree(head);
- dev->archdata.iommu = NULL;
- return -ENOMEM;
+ return iommu_fwspec_add_ids(dev, args->args, 1);
}
static struct iommu_ops mtk_iommu_ops = {
@@ -583,17 +546,19 @@ static int mtk_iommu_probe(struct platform_device *pdev)
continue;
plarbdev = of_find_device_by_node(larbnode);
- of_node_put(larbnode);
if (!plarbdev) {
plarbdev = of_platform_device_create(
larbnode, NULL,
platform_bus_type.dev_root);
- if (!plarbdev)
+ if (!plarbdev) {
+ of_node_put(larbnode);
return -EPROBE_DEFER;
+ }
}
data->smi_imu.larb_imu[i].dev = &plarbdev->dev;
- component_match_add(dev, &match, compare_of, larbnode);
+ component_match_add_release(dev, &match, release_of,
+ compare_of, larbnode);
}
platform_set_drvdata(pdev, data);