diff options
| author | Robin Murphy <robin.murphy@arm.com> | 2016-09-12 17:13:46 +0100 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2016-09-16 09:34:17 +0100 |
| commit | 08d4ca2a672bab34e6640ffa946844d09d4f6f60 (patch) | |
| tree | dbeaa2195fa98cfeb47a72d4449a28f550a06b95 /drivers/iommu | |
| parent | 8f78515425daead9d69e061cc4d8da8299ed0e88 (diff) | |
iommu/arm-smmu: Support non-PCI devices with SMMUv3
With the device <-> stream ID relationship suitably abstracted and
of_xlate() hooked up, the PCI dependency now looks, and is, entirely
arbitrary. Any bus using the of_dma_configure() mechanism will work,
so extend support to the platform and AMBA buses which do just that.
Acked-by: Will Deacon <will.deacon@arm.com>
Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/iommu/arm-smmu-v3.c | 37 |
2 files changed, 32 insertions, 7 deletions
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index d432ca828472..8ee54d71c7eb 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -309,7 +309,7 @@ config ARM_SMMU config ARM_SMMU_V3 bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support" - depends on ARM64 && PCI + depends on ARM64 select IOMMU_API select IOMMU_IO_PGTABLE_LPAE select GENERIC_MSI_IRQ_DOMAIN diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c index 15ba80db6465..52860bcf80f2 100644 --- a/drivers/iommu/arm-smmu-v3.c +++ b/drivers/iommu/arm-smmu-v3.c @@ -35,6 +35,8 @@ #include <linux/pci.h> #include <linux/platform_device.h> +#include <linux/amba/bus.h> + #include "io-pgtable.h" /* MMIO registers */ @@ -1805,6 +1807,23 @@ static void arm_smmu_remove_device(struct device *dev) iommu_fwspec_free(dev); } +static struct iommu_group *arm_smmu_device_group(struct device *dev) +{ + struct iommu_group *group; + + /* + * We don't support devices sharing stream IDs other than PCI RID + * aliases, since the necessary ID-to-device lookup becomes rather + * impractical given a potential sparse 32-bit stream ID space. + */ + if (dev_is_pci(dev)) + group = pci_device_group(dev); + else + group = generic_device_group(dev); + + return group; +} + static int arm_smmu_domain_get_attr(struct iommu_domain *domain, enum iommu_attr attr, void *data) { @@ -1851,10 +1870,6 @@ out_unlock: static int arm_smmu_of_xlate(struct device *dev, struct of_phandle_args *args) { - /* We only support PCI, for now */ - if (!dev_is_pci(dev)) - return -ENODEV; - return iommu_fwspec_add_ids(dev, args->args, 1); } @@ -1869,7 +1884,7 @@ static struct iommu_ops arm_smmu_ops = { .iova_to_phys = arm_smmu_iova_to_phys, .add_device = arm_smmu_add_device, .remove_device = arm_smmu_remove_device, - .device_group = pci_device_group, + .device_group = arm_smmu_device_group, .domain_get_attr = arm_smmu_domain_get_attr, .domain_set_attr = arm_smmu_domain_set_attr, .of_xlate = arm_smmu_of_xlate, @@ -2613,8 +2628,18 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev) /* And we're up. Go go go! */ of_iommu_set_ops(dev->of_node, &arm_smmu_ops); +#ifdef CONFIG_PCI pci_request_acs(); - return bus_set_iommu(&pci_bus_type, &arm_smmu_ops); + ret = bus_set_iommu(&pci_bus_type, &arm_smmu_ops); + if (ret) + return ret; +#endif +#ifdef CONFIG_ARM_AMBA + ret = bus_set_iommu(&amba_bustype, &arm_smmu_ops); + if (ret) + return ret; +#endif + return bus_set_iommu(&platform_bus_type, &arm_smmu_ops); } static int arm_smmu_device_remove(struct platform_device *pdev) |