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iommu/ipmmu-vmsa: Unify ipmmu_ops

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The remaining difference between the ARM-specific and iommu-dma ops is
in the {add,remove}_device implementations, but even those have some
overlap and duplication. By stubbing out the few arm_iommu_*() calls,
we can get rid of the rest of the inline #ifdeffery to both simplify the
code and improve build coverage.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Robin Murphy 2017-10-13 19:23:42 +01:00 committed by Alex Williamson
parent e4efe4a9a2
commit 49c875f030
1 changed files with 19 additions and 50 deletions
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69
drivers/iommu/ipmmu-vmsa.c
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@ -27,6 +27,11 @@
#if defined(CONFIG_ARM) && !defined(CONFIG_IOMMU_DMA)
#include <asm/dma-iommu.h>
#include <asm/pgalloc.h>
#else
#define arm_iommu_create_mapping(...) NULL
#define arm_iommu_attach_device(...) -ENODEV
#define arm_iommu_release_mapping(...) do {} while (0)
#define arm_iommu_detach_device(...) do {} while (0)
#endif
#include "io-pgtable.h"
@ -678,26 +683,17 @@ static int ipmmu_of_xlate(struct device *dev,
return ipmmu_init_platform_device(dev, spec);
}
#if defined(CONFIG_ARM) && !defined(CONFIG_IOMMU_DMA)
static int ipmmu_add_device(struct device *dev)
static int ipmmu_init_arm_mapping(struct device *dev)
{
struct ipmmu_vmsa_device *mmu = to_ipmmu(dev);
struct iommu_group *group;
int ret;
/*
* Only let through devices that have been verified in xlate()
*/
if (!mmu)
return -ENODEV;
/* Create a device group and add the device to it. */
group = iommu_group_alloc();
if (IS_ERR(group)) {
dev_err(dev, "Failed to allocate IOMMU group\n");
ret = PTR_ERR(group);
goto error;
return PTR_ERR(group);
}
ret = iommu_group_add_device(group, dev);
@ -705,8 +701,7 @@ static int ipmmu_add_device(struct device *dev)
if (ret < 0) {
dev_err(dev, "Failed to add device to IPMMU group\n");
group = NULL;
goto error;
return ret;
}
/*
@ -742,41 +737,14 @@ static int ipmmu_add_device(struct device *dev)
return 0;
error:
if (mmu)
iommu_group_remove_device(dev);
if (mmu->mapping)
arm_iommu_release_mapping(mmu->mapping);
if (!IS_ERR_OR_NULL(group))
iommu_group_remove_device(dev);
return ret;
}
static void ipmmu_remove_device(struct device *dev)
{
arm_iommu_detach_device(dev);
iommu_group_remove_device(dev);
}
static const struct iommu_ops ipmmu_ops = {
.domain_alloc = ipmmu_domain_alloc,
.domain_free = ipmmu_domain_free,
.attach_dev = ipmmu_attach_device,
.detach_dev = ipmmu_detach_device,
.map = ipmmu_map,
.unmap = ipmmu_unmap,
.map_sg = default_iommu_map_sg,
.iova_to_phys = ipmmu_iova_to_phys,
.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 */
#ifdef CONFIG_IOMMU_DMA
static int ipmmu_add_device_dma(struct device *dev)
static int ipmmu_add_device(struct device *dev)
{
struct iommu_group *group;
@ -786,15 +754,20 @@ static int ipmmu_add_device_dma(struct device *dev)
if (!to_ipmmu(dev))
return -ENODEV;
if (IS_ENABLED(CONFIG_ARM) && !IS_ENABLED(CONFIG_IOMMU_DMA))
return ipmmu_init_arm_mapping(dev);
group = iommu_group_get_for_dev(dev);
if (IS_ERR(group))
return PTR_ERR(group);
iommu_group_put(group);
return 0;
}
static void ipmmu_remove_device_dma(struct device *dev)
static void ipmmu_remove_device(struct device *dev)
{
arm_iommu_detach_device(dev);
iommu_group_remove_device(dev);
}
@ -824,15 +797,13 @@ static const struct iommu_ops ipmmu_ops = {
.iotlb_sync = ipmmu_iotlb_sync,
.map_sg = default_iommu_map_sg,
.iova_to_phys = ipmmu_iova_to_phys,
.add_device = ipmmu_add_device_dma,
.remove_device = ipmmu_remove_device_dma,
.add_device = ipmmu_add_device,
.remove_device = ipmmu_remove_device,
.device_group = ipmmu_find_group,
.pgsize_bitmap = SZ_1G | SZ_2M | SZ_4K,
.of_xlate = ipmmu_of_xlate,
};
#endif /* CONFIG_IOMMU_DMA */
/* -----------------------------------------------------------------------------
* Probe/remove and init
*/
@ -929,9 +900,7 @@ static int ipmmu_remove(struct platform_device *pdev)
iommu_device_sysfs_remove(&mmu->iommu);
iommu_device_unregister(&mmu->iommu);
#if defined(CONFIG_ARM) && !defined(CONFIG_IOMMU_DMA)
arm_iommu_release_mapping(mmu->mapping);
#endif
ipmmu_device_reset(mmu);