summaryrefslogtreecommitdiffstats
path: root/drivers/iommu/ipmmu-vmsa.c
diff options
context:
space:
mode:
authorYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>2018-11-28 09:23:36 +0000
committerJoerg Roedel <jroedel@suse.de>2018-12-03 14:23:53 +0100
commitb7ee92c6ff0e023a473b2500d771f6bf504fcc1a (patch)
tree82c810d8070e5b4fea8d850ca702041a97cc3d92 /drivers/iommu/ipmmu-vmsa.c
parent31fc9763f9d752b75711156ef6a066f6ea264be5 (diff)
downloadlinux-b7ee92c6ff0e023a473b2500d771f6bf504fcc1a.tar.bz2
iommu/ipmmu-vmsa: Modify ipmmu_slave_whitelist() to check SoC revisions
Some R-Car Gen3 SoCs has hardware restrictions on the IPMMU. So, to check whether this R-Car Gen3 SoC can use the IPMMU correctly, this patch modifies the ipmmu_slave_whitelist(). Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/ipmmu-vmsa.c')
-rw-r--r--drivers/iommu/ipmmu-vmsa.c34
1 files changed, 26 insertions, 8 deletions
diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c
index aa0de59f3679..46906a763d69 100644
--- a/drivers/iommu/ipmmu-vmsa.c
+++ b/drivers/iommu/ipmmu-vmsa.c
@@ -751,12 +751,6 @@ 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_rcar_gen3[] = {
{ .soc_id = "r8a774a1", },
{ .soc_id = "r8a7795", },
@@ -768,11 +762,35 @@ static const struct soc_device_attribute soc_rcar_gen3[] = {
{ /* sentinel */ }
};
+static const struct soc_device_attribute soc_rcar_gen3_whitelist[] = {
+ { .soc_id = "r8a7795", .revision = "ES3.*" },
+ { .soc_id = "r8a77965", },
+ { .soc_id = "r8a77990", },
+ { .soc_id = "r8a77995", },
+ { /* sentinel */ }
+};
+
+static bool ipmmu_slave_whitelist(struct device *dev)
+{
+ /*
+ * For R-Car Gen3 use a white list to opt-in slave devices.
+ * For Other SoCs, this returns true anyway.
+ */
+ if (!soc_device_match(soc_rcar_gen3))
+ return true;
+
+ /* Check whether this R-Car Gen3 can use the IPMMU correctly or not */
+ if (!soc_device_match(soc_rcar_gen3_whitelist))
+ return false;
+
+ /* By default, do not allow use of IPMMU */
+ return false;
+}
+
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_rcar_gen3) && !ipmmu_slave_whitelist(dev))
+ if (!ipmmu_slave_whitelist(dev))
return -ENODEV;
iommu_fwspec_add_ids(dev, spec->args, 1);