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arm64: Hook up IOMMU dma_ops 

With iommu_dma_ops in place, hook them up to the configuration code, so
IOMMU-fronted devices will get them automatically.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Robin Murphy 2015-10-01 20:14:00 +01:00 committed by Joerg Roedel
parent 13b8629f65
commit 876945dbf6
3 changed files with 30 additions and 8 deletions
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1
arch/arm64/Kconfig
View File

@ -75,6 +75,7 @@ config ARM64
select HAVE_PERF_USER_STACK_DUMP
select HAVE_RCU_TABLE_FREE
select HAVE_SYSCALL_TRACEPOINTS
select IOMMU_DMA if IOMMU_SUPPORT
select IRQ_DOMAIN
select IRQ_FORCED_THREADING
select MODULES_USE_ELF_RELA

15
arch/arm64/include/asm/dma-mapping.h
View File

@ -54,16 +54,15 @@ static inline struct dma_map_ops *get_dma_ops(struct device *dev)
return __generic_dma_ops(dev);
}
static inline void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
struct iommu_ops *iommu, bool coherent)
{
if (!acpi_disabled && !dev->archdata.dma_ops)
dev->archdata.dma_ops = dma_ops;
dev->archdata.dma_coherent = coherent;
}
void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
struct iommu_ops *iommu, bool coherent);
#define arch_setup_dma_ops arch_setup_dma_ops
#ifdef CONFIG_IOMMU_DMA
void arch_teardown_dma_ops(struct device *dev);
#define arch_teardown_dma_ops arch_teardown_dma_ops
#endif
/* do not use this function in a driver */
static inline bool is_device_dma_coherent(struct device *dev)
{

22
arch/arm64/mm/dma-mapping.c
View File

@ -960,6 +960,19 @@ static void __iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
}
}
void arch_teardown_dma_ops(struct device *dev)
{
struct iommu_domain *domain = iommu_get_domain_for_dev(dev);
if (domain) {
iommu_detach_device(domain, dev);
if (domain->type & __IOMMU_DOMAIN_FAKE_DEFAULT)
iommu_domain_free(domain);
}
dev->archdata.dma_ops = NULL;
}
#else
static void __iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
@ -968,3 +981,12 @@ static void __iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
#endif /* CONFIG_IOMMU_DMA */
void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
struct iommu_ops *iommu, bool coherent)
{
if (!acpi_disabled && !dev->archdata.dma_ops)
dev->archdata.dma_ops = dma_ops;
dev->archdata.dma_coherent = coherent;
__iommu_setup_dma_ops(dev, dma_base, size, iommu);
}