diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/iommu/ipmmu-vmsa.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c index 65ad6910cb70..8dce3a9de9d8 100644 --- a/drivers/iommu/ipmmu-vmsa.c +++ b/drivers/iommu/ipmmu-vmsa.c @@ -25,6 +25,7 @@ #include <linux/platform_device.h> #include <linux/sizes.h> #include <linux/slab.h> +#include <linux/sys_soc.h> #if defined(CONFIG_ARM) && !defined(CONFIG_IOMMU_DMA) #include <asm/dma-iommu.h> @@ -749,9 +750,24 @@ static int ipmmu_init_platform_device(struct device *dev, return 0; } +static bool ipmmu_slave_whitelist(struct device *dev) +{ + /* By default, do not allow use of IPMMU */ + return false; +} + +static const struct soc_device_attribute soc_r8a7795[] = { + { .soc_id = "r8a7795", }, + { /* sentinel */ } +}; + static int ipmmu_of_xlate(struct device *dev, struct of_phandle_args *spec) { + /* For R-Car Gen3 use a white list to opt-in slave devices */ + if (soc_device_match(soc_r8a7795) && !ipmmu_slave_whitelist(dev)) + return -ENODEV; + iommu_fwspec_add_ids(dev, spec->args, 1); /* Initialize once - xlate() will call multiple times */ @@ -903,11 +919,22 @@ static const struct ipmmu_features ipmmu_features_default = { .twobit_imttbcr_sl0 = false, }; +static const struct ipmmu_features ipmmu_features_r8a7795 = { + .use_ns_alias_offset = false, + .has_cache_leaf_nodes = true, + .number_of_contexts = 8, + .setup_imbuscr = false, + .twobit_imttbcr_sl0 = true, +}; + static const struct of_device_id ipmmu_of_ids[] = { { .compatible = "renesas,ipmmu-vmsa", .data = &ipmmu_features_default, }, { + .compatible = "renesas,ipmmu-r8a7795", + .data = &ipmmu_features_r8a7795, + }, { /* Terminator */ }, }; @@ -1090,6 +1117,8 @@ static int __init ipmmu_vmsa_iommu_of_setup(struct device_node *np) IOMMU_OF_DECLARE(ipmmu_vmsa_iommu_of, "renesas,ipmmu-vmsa", ipmmu_vmsa_iommu_of_setup); +IOMMU_OF_DECLARE(ipmmu_r8a7795_iommu_of, "renesas,ipmmu-r8a7795", + ipmmu_vmsa_iommu_of_setup); #endif MODULE_DESCRIPTION("IOMMU API for Renesas VMSA-compatible IPMMU"); |