Il 31/08/22 14:55, Chengci.Xu ha scritto:
The register which can enable IOMMU for INFRA master should be setted
in secure world for security concerns. Therefore, we add a SMC command
for INFRA master to enable/disable INFRA IOMMU in ATF. This function is
prepared for MT8188.
Signed-off-by: Chengci.Xu <chengci.xu@xxxxxxxxxxxx>
---
drivers/iommu/mtk_iommu.c | 34 ++++++++++++++++++++++++++--------
include/soc/mediatek/smi.h | 1 +
2 files changed, 27 insertions(+), 8 deletions(-)
diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 7e363b1f24df..6fe780783ec8 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -3,6 +3,7 @@
* Copyright (c) 2015-2016 MediaTek Inc.
* Author: Yong Wu <yong.wu@xxxxxxxxxxxx>
*/
+#include <linux/arm-smccc.h>
#include <linux/bitfield.h>
#include <linux/bug.h>
#include <linux/clk.h>
@@ -28,6 +29,7 @@
#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>
@@ -138,6 +140,7 @@
#define PM_CLK_AO BIT(15)
#define IFA_IOMMU_PCIE_SUPPORT BIT(16)
#define PGTABLE_PA_35_EN BIT(17)
+#define CFG_IFA_MASTER_IN_ATF BIT(18)
#define MTK_IOMMU_HAS_FLAG_MASK(pdata, _x, mask) \
((((pdata)->flags) & (mask)) == (_x))
@@ -554,14 +557,29 @@ static int mtk_iommu_config(struct mtk_iommu_data *data, struct device *dev,
else
larb_mmu->mmu &= ~MTK_SMI_MMU_EN(portid);
} else if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_INFRA)) {
- peri_mmuen_msk = BIT(portid);
- /* PCI dev has only one output id, enable the next writing bit for PCIe */
- if (dev_is_pci(dev))
- peri_mmuen_msk |= BIT(portid + 1);
-
- peri_mmuen = enable ? peri_mmuen_msk : 0;
- ret = regmap_update_bits(data->pericfg, PERICFG_IOMMU_1,
- peri_mmuen_msk, peri_mmuen);
+ if (MTK_IOMMU_HAS_FLAG(data->plat_data, CFG_IFA_MASTER_IN_ATF)) {
+ struct arm_smccc_res res;
+
+ portid = MTK_M4U_TO_PORT(fwspec->ids[i]);
This assignment is redundant, as portid is initialized to the same value
just a few lines before. Please drop it.
Everything else looks good.
Regards,
Angelo
+ arm_smccc_smc(MTK_SIP_KERNEL_IOMMU_CONTROL,
+ IOMMU_ATF_CMD_CONFIG_INFRA_IOMMU,
+ portid, enable, 0, 0, 0, 0, &res);
+ ret = (int)res.a0;
