#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>
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 */
.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 */
},
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");