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iommu/ipmmu-vmsa: Consistent ->of_xlate() handling 

The 32-bit ARM code gets updated to make use of ->of_xlate() and the
code is shared between 64-bit and 32-bit ARM. The of_device_is_available()
check gets dropped since it is included in of_iommu_xlate().

Suggested-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Magnus Damm <damm+renesas@opensource.se>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Magnus Damm 2017-07-17 22:05:20 +09:00 committed by Joerg Roedel
parent 01da21e562
commit 49558da030
1 changed files with 17 additions and 34 deletions
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51
drivers/iommu/ipmmu-vmsa.c
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@ -734,6 +734,16 @@ error:
return ret;
}
static int ipmmu_of_xlate(struct device *dev,
struct of_phandle_args *spec)
{
/* Initialize once - xlate() will call multiple times */
if (to_priv(dev))
return 0;
return ipmmu_init_platform_device(dev);
}
#if defined(CONFIG_ARM) && !defined(CONFIG_IOMMU_DMA)
static struct iommu_domain *ipmmu_domain_alloc(unsigned type)
@ -750,11 +760,11 @@ static int ipmmu_add_device(struct device *dev)
struct iommu_group *group;
int ret;
if (to_priv(dev)) {
dev_warn(dev, "IOMMU driver already assigned to device %s\n",
dev_name(dev));
return -EINVAL;
}
/*
* Only let through devices that have been verified in xlate()
*/
if (!to_priv(dev))
return -ENODEV;
/* Create a device group and add the device to it. */
group = iommu_group_alloc();
@ -773,10 +783,6 @@ static int ipmmu_add_device(struct device *dev)
goto error;
}
ret = ipmmu_init_platform_device(dev);
if (ret < 0)
goto error;
/*
* Create the ARM mapping, used by the ARM DMA mapping core to allocate
* VAs. This will allocate a corresponding IOMMU domain.
@ -817,24 +823,13 @@ error:
if (!IS_ERR_OR_NULL(group))
iommu_group_remove_device(dev);
kfree(to_priv(dev)->utlbs);
kfree(to_priv(dev));
set_priv(dev, NULL);
return ret;
}
static void ipmmu_remove_device(struct device *dev)
{
struct ipmmu_vmsa_iommu_priv *priv = to_priv(dev);
arm_iommu_detach_device(dev);
iommu_group_remove_device(dev);
kfree(priv->utlbs);
kfree(priv);
set_priv(dev, NULL);
}
static const struct iommu_ops ipmmu_ops = {
@ -849,6 +844,7 @@ static const struct iommu_ops ipmmu_ops = {
.add_device = ipmmu_add_device,
.remove_device = ipmmu_remove_device,
.pgsize_bitmap = SZ_1G | SZ_2M | SZ_4K,
.of_xlate = ipmmu_of_xlate,
};
#endif /* !CONFIG_ARM && CONFIG_IOMMU_DMA */
@ -958,19 +954,6 @@ static struct iommu_group *ipmmu_find_group_dma(struct device *dev)
return group;
}
static int ipmmu_of_xlate_dma(struct device *dev,
struct of_phandle_args *spec)
{
/* If the IPMMU device is disabled in DT then return error
* to make sure the of_iommu code does not install ops
* even though the iommu device is disabled
*/
if (!of_device_is_available(spec->np))
return -ENODEV;
return ipmmu_init_platform_device(dev);
}
static const struct iommu_ops ipmmu_ops = {
.domain_alloc = ipmmu_domain_alloc_dma,
.domain_free = ipmmu_domain_free_dma,
@ -984,7 +967,7 @@ static const struct iommu_ops ipmmu_ops = {
.remove_device = ipmmu_remove_device_dma,
.device_group = ipmmu_find_group_dma,
.pgsize_bitmap = SZ_1G | SZ_2M | SZ_4K,
.of_xlate = ipmmu_of_xlate_dma,
.of_xlate = ipmmu_of_xlate,
};
#endif /* CONFIG_IOMMU_DMA */