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iommu/mediatek: Convert M4Uv2 to iommu_fwspec 

Our per-device data consists of the M4U instance and firmware-provided
list of LARB IDs, which is a perfect fit for the generic iommu_fwspec
machinery. Use that directly as a simpler alternative to the custom
archdata code.

CC: Yong Wu <yong.wu@mediatek.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Tested-by: Yong Wu <yong.wu@mediatek.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Robin Murphy 2016-10-17 12:49:20 +01:00 committed by Joerg Roedel
parent bc33b0ca11
commit 58f0d1d536
1 changed files with 18 additions and 57 deletions
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75
drivers/iommu/mtk_iommu.c
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@ -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))
@ -379,33 +375,21 @@ 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))
@ -416,7 +400,6 @@ static struct iommu_group *mtk_iommu_device_group(struct device *dev)
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 +408,16 @@ 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 = {