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iommu/msm: Make use of iommu_device_register interface 

Register the MSM IOMMUs to the iommu core and add sysfs
entries for that driver.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
hifive-unleashed-5.1
Joerg Roedel 2017-02-02 18:52:34 +01:00
parent 9648cbc962
commit 42df43b361
2 changed files with 76 additions and 0 deletions
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73
drivers/iommu/msm_iommu.c
View File

@ -371,6 +371,58 @@ static int msm_iommu_domain_config(struct msm_priv *priv)
return 0;
}
/* Must be called under msm_iommu_lock */
static struct msm_iommu_dev *find_iommu_for_dev(struct device *dev)
{
struct msm_iommu_dev *iommu, *ret = NULL;
struct msm_iommu_ctx_dev *master;
list_for_each_entry(iommu, &qcom_iommu_devices, dev_node) {
master = list_first_entry(&iommu->ctx_list,
struct msm_iommu_ctx_dev,
list);
if (master->of_node == dev->of_node) {
ret = iommu;
break;
}
}
return ret;
}
static int msm_iommu_add_device(struct device *dev)
{
struct msm_iommu_dev *iommu;
unsigned long flags;
int ret = 0;
spin_lock_irqsave(&msm_iommu_lock, flags);
iommu = find_iommu_for_dev(dev);
if (iommu)
iommu_device_link(&iommu->iommu, dev);
else
ret = -ENODEV;
spin_unlock_irqrestore(&msm_iommu_lock, flags);
return ret;
}
static void msm_iommu_remove_device(struct device *dev)
{
struct msm_iommu_dev *iommu;
unsigned long flags;
spin_lock_irqsave(&msm_iommu_lock, flags);
iommu = find_iommu_for_dev(dev);
if (iommu)
iommu_device_unlink(&iommu->iommu, dev);
spin_unlock_irqrestore(&msm_iommu_lock, flags);
}
static int msm_iommu_attach_dev(struct iommu_domain *domain, struct device *dev)
{
int ret = 0;
@ -646,6 +698,8 @@ static struct iommu_ops msm_iommu_ops = {
.unmap = msm_iommu_unmap,
.map_sg = default_iommu_map_sg,
.iova_to_phys = msm_iommu_iova_to_phys,
.add_device = msm_iommu_add_device,
.remove_device = msm_iommu_remove_device,
.pgsize_bitmap = MSM_IOMMU_PGSIZES,
.of_xlate = qcom_iommu_of_xlate,
};
@ -653,6 +707,7 @@ static struct iommu_ops msm_iommu_ops = {
static int msm_iommu_probe(struct platform_device *pdev)
{
struct resource *r;
resource_size_t ioaddr;
struct msm_iommu_dev *iommu;
int ret, par, val;
@ -696,6 +751,7 @@ static int msm_iommu_probe(struct platform_device *pdev)
ret = PTR_ERR(iommu->base);
goto fail;
}
ioaddr = r->start;
iommu->irq = platform_get_irq(pdev, 0);
if (iommu->irq < 0) {
@ -737,6 +793,23 @@ static int msm_iommu_probe(struct platform_device *pdev)
}
list_add(&iommu->dev_node, &qcom_iommu_devices);
ret = iommu_device_sysfs_add(&iommu->iommu, iommu->dev, NULL,
"msm-smmu.%pa", &ioaddr);
if (ret) {
pr_err("Could not add msm-smmu at %pa to sysfs\n", &ioaddr);
goto fail;
}
iommu_device_set_ops(&iommu->iommu, &msm_iommu_ops);
iommu_device_set_fwnode(&iommu->iommu, &pdev->dev.of_node->fwnode);
ret = iommu_device_register(&iommu->iommu);
if (ret) {
pr_err("Could not register msm-smmu at %pa\n", &ioaddr);
goto fail;
}
of_iommu_set_ops(pdev->dev.of_node, &msm_iommu_ops);
pr_info("device mapped at %p, irq %d with %d ctx banks\n",

3
drivers/iommu/msm_iommu.h
View File

@ -19,6 +19,7 @@
#define MSM_IOMMU_H
#include <linux/interrupt.h>
#include <linux/iommu.h>
#include <linux/clk.h>
/* Sharability attributes of MSM IOMMU mappings */
@ -68,6 +69,8 @@ struct msm_iommu_dev {
struct list_head dom_node;
struct list_head ctx_list;
DECLARE_BITMAP(context_map, IOMMU_MAX_CBS);
struct iommu_device iommu;
};
/**