From: "Chengci.Xu" <chengci.xu@mediatek.com>
Prepare for MT8188. In MT8188, the register which enables IOMMU for
INFRA masters are in the secure world for security concerns, therefore we
add a SMC command for INFRA masters to enable IOMMU in ATF.
Signed-off-by: Chengci.Xu <chengci.xu@mediatek.com>
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
drivers/iommu/mtk_iommu.c | 32 ++++++++++++++++++++++----------
include/soc/mediatek/smi.h | 1 +
2 files changed, 23 insertions(+), 10 deletions(-)
@@ -3,6 +3,7 @@
* Copyright (c) 2015-2016 MediaTek Inc.
* Author: Yong Wu <yong.wu@mediatek.com>
*/
+#include <linux/arm-smccc.h>
#include <linux/bitfield.h>
#include <linux/bug.h>
#include <linux/clk.h>
@@ -27,6 +28,7 @@
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/soc/mediatek/infracfg.h>
+#include <linux/soc/mediatek/mtk_sip_svc.h>
#include <asm/barrier.h>
#include <soc/mediatek/smi.h>
@@ -143,6 +145,7 @@
#define PGTABLE_PA_35_EN BIT(17)
#define TF_PORT_TO_ADDR_MT8173 BIT(18)
#define INT_ID_PORT_WIDTH_6 BIT(19)
+#define CFG_IFA_MASTER_IN_ATF BIT(20)
#define MTK_IOMMU_HAS_FLAG_MASK(pdata, _x, mask) \
((((pdata)->flags) & (mask)) == (_x))
@@ -580,6 +583,7 @@ static int mtk_iommu_config(struct mtk_iommu_data *data, struct device *dev,
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
const struct mtk_iommu_iova_region *region;
unsigned long portid_msk = 0;
+ struct arm_smccc_res res;
int i, ret = 0;
for (i = 0; i < fwspec->num_ids; ++i) {
@@ -605,17 +609,24 @@ static int mtk_iommu_config(struct mtk_iommu_data *data, struct device *dev,
else
larb_mmu->mmu &= ~portid_msk;
} else if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_INFRA)) {
- /* PCI dev has only one output id, enable the next writing bit for PCIe */
- if (dev_is_pci(dev)) {
- if (fwspec->num_ids != 1) {
- dev_err(dev, "PCI dev can only have one port.\n");
- return -ENODEV;
+ if (MTK_IOMMU_HAS_FLAG(data->plat_data, CFG_IFA_MASTER_IN_ATF)) {
+ arm_smccc_smc(MTK_SIP_KERNEL_IOMMU_CONTROL,
+ IOMMU_ATF_CMD_CONFIG_INFRA_IOMMU,
+ portid_msk, enable, 0, 0, 0, 0, &res);
+ ret = res.a0;
+ } else {
+ /* PCI dev has only one output id, enable the next writing bit for PCIe */
+ if (dev_is_pci(dev)) {
+ if (fwspec->num_ids != 1) {
+ dev_err(dev, "PCI dev can only have one port.\n");
+ return -ENODEV;
+ }
+ portid_msk |= BIT(portid + 1);
}
- portid_msk |= BIT(portid + 1);
- }
- ret = regmap_update_bits(data->pericfg, PERICFG_IOMMU_1,
- (u32)portid_msk, enable ? (u32)portid_msk : 0);
+ ret = regmap_update_bits(data->pericfg, PERICFG_IOMMU_1,
+ (u32)portid_msk, enable ? (u32)portid_msk : 0);
+ }
if (ret)
dev_err(dev, "%s iommu(%s) inframaster 0x%lx fail(%d).\n",
enable ? "enable" : "disable",
@@ -1321,7 +1332,8 @@ static int mtk_iommu_probe(struct platform_device *pdev)
dev_err_probe(dev, ret, "mm dts parse fail\n");
goto out_runtime_disable;
}
- } else if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_INFRA)) {
+ } else if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_INFRA) &&
+ !MTK_IOMMU_HAS_FLAG(data->plat_data, CFG_IFA_MASTER_IN_ATF)) {
p = data->plat_data->pericfg_comp_str;
data->pericfg = syscon_regmap_lookup_by_compatible(p);
if (IS_ERR(data->pericfg)) {
@@ -13,6 +13,7 @@
enum iommu_atf_cmd {
IOMMU_ATF_CMD_CONFIG_SMI_LARB, /* For mm master to en/disable iommu */
+ IOMMU_ATF_CMD_CONFIG_INFRA_IOMMU, /* For infra master to enable iommu */
IOMMU_ATF_CMD_MAX,
};