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authorMagnus Damm <damm+renesas@opensource.se>2017-10-16 21:30:50 +0900
committerAlex Williamson <alex.williamson@redhat.com>2017-11-06 10:29:39 -0700
commit58b8e8bf409236cdea379b8a3ab5d7b85a003d22 (patch)
treea3e29b043783b6e0acf0d1bf0cc618def1d91322 /drivers/iommu
parentc295f504fb5a38abbb4094e687ee333a75613a0c (diff)
downloadlinux-58b8e8bf409236cdea379b8a3ab5d7b85a003d22.tar.bz2
iommu/ipmmu-vmsa: Hook up r8a7795 DT matching code
Tie in r8a7795 features and update the IOMMU_OF_DECLARE compat string to include the updated compat string. Signed-off-by: Magnus Damm <damm+renesas@opensource.se> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/ipmmu-vmsa.c29
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");