[PATCH v4 0/4] MT8188 SMI SUPPORT

[PATCH v4 0/4] MT8188 SMI SUPPORT

[Chengci.Xu]

This patchset adds MT8188 SMI support.

MT8188, similar to mt8195, there are two SMI-common HW, one is for
VDO(video output), the other is for VPP(video processing pipe). They
connect with different SMI-larbs, then some setting(bus_sel) is
different.

The connection between SMI and MM IOMMU could be something like this:

  IOMMU(VDO)           IOMMU(VPP)
     |                    |
SMI_COMMON_VDO       SMI_COMMON_VPP
----------------     ----------------
  |     |   ...       |     |    ...
larb0 larb2 ...     larb1 larb3  ...

Another change is that the register about enable/disable iommu is in
security world. We add some SMC command to set it. And we add a return
value for configure port function because SMC call may fail.

changes since v4:
  - base on tag: next-20220728.
  - new patch[2/4] to add return value for all config port function.
  - rename enum IOMMU_ATF_CMD to a lower case: iommu_atf_cmd.
  - rename MTK_SMI_FLAG_SEC_REG to MTK_SMI_FLAG_CFG_PORT_SEC_CTL.
  - rename IOMMU_ATF_CMD_COUNT to IOMMU_ATF_CMD_MAX.
  - add some comment for why still need write SMI_LARB_NONSEC_CON.
  - return an error(-EINVAL) when enable iommu failed by SMC call.
  - put enum iommu_atf_cmd inside the macro CONFIG_MTK_SMI.

changes since v3:
  - base on tag: next-20220726.
  - No code change just remove the change-id in patch [2/3].

changes since v2:
  - base on tag: next-20220722.
  - Move some included header to the source file that use them.

changes since v1:
  - base on tag: next-20220720.
  - adds MT8188 SMI support.

Chengci.Xu (4):
  dt-bindings: memory: mediatek: Add mt8188 smi binding
  memory: mtk-smi: Add return value for configure port function
  memory: mtk-smi: Add enable IOMMU SMC command for MM master
  memory: mtk-smi: mt8188: Add SMI Support

 .../mediatek,smi-common.yaml                  |   4 +-
 .../memory-controllers/mediatek,smi-larb.yaml |   3 +
 drivers/memory/mtk-smi.c                      | 108 +++++++++++++++++-
 include/linux/soc/mediatek/mtk_sip_svc.h      |   3 +
 include/soc/mediatek/smi.h                    |   5 +
 5 files changed, 116 insertions(+), 7 deletions(-)

-- 
2.25.1


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[PATCH v4 1/4] dt-bindings: memory: mediatek: Add mt8188 smi binding

[Chengci.Xu]

Add mt8188 smi supporting in the bindings.

In mt8188, there are two smi-common HW, one is for vdo(video output),
the other is for vpp(video processing pipe). They connect with different
smi-larbs, then some setting(bus_sel) is different. Differentiate them
with the compatible string.

Something like this:

   IOMMU(VDO)          IOMMU(VPP)
       |                   |
SMI_COMMON_VDO       SMI_COMMON_VPP
----------------     ----------------
   |     |   ...       |     |    ...
 larb0 larb2 ...     larb1 larb3  ...

Signed-off-by: Chengci.Xu <chengci.xu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Yong Wu <yong.wu@mediatek.com>
---
 .../bindings/memory-controllers/mediatek,smi-common.yaml      | 4 +++-
 .../bindings/memory-controllers/mediatek,smi-larb.yaml        | 3 +++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml
index 71bc5cefb49c..70bba66c7551 100644
--- a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml
+++ b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml
@@ -16,7 +16,7 @@ description: |
   MediaTek SMI have two generations of HW architecture, here is the list
   which generation the SoCs use:
   generation 1: mt2701 and mt7623.
-  generation 2: mt2712, mt6779, mt8167, mt8173, mt8183, mt8186, mt8192 and mt8195.
+  generation 2: mt2712, mt6779, mt8167, mt8173, mt8183, mt8186, mt8188, mt8192 and mt8195.
 
   There's slight differences between the two SMI, for generation 2, the
   register which control the iommu port is at each larb's register base. But
@@ -37,6 +37,8 @@ properties:
           - mediatek,mt8173-smi-common
           - mediatek,mt8183-smi-common
           - mediatek,mt8186-smi-common
+          - mediatek,mt8188-smi-common-vdo
+          - mediatek,mt8188-smi-common-vpp
           - mediatek,mt8192-smi-common
           - mediatek,mt8195-smi-common-vdo
           - mediatek,mt8195-smi-common-vpp
diff --git a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.yaml b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.yaml
index 59dcd163668f..5f4ac3609887 100644
--- a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.yaml
+++ b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.yaml
@@ -25,6 +25,7 @@ properties:
           - mediatek,mt8173-smi-larb
           - mediatek,mt8183-smi-larb
           - mediatek,mt8186-smi-larb
+          - mediatek,mt8188-smi-larb
           - mediatek,mt8192-smi-larb
           - mediatek,mt8195-smi-larb
 
@@ -78,6 +79,7 @@ allOf:
           enum:
             - mediatek,mt8183-smi-larb
             - mediatek,mt8186-smi-larb
+            - mediatek,mt8188-smi-larb
             - mediatek,mt8195-smi-larb
 
     then:
@@ -111,6 +113,7 @@ allOf:
               - mediatek,mt2712-smi-larb
               - mediatek,mt6779-smi-larb
               - mediatek,mt8186-smi-larb
+              - mediatek,mt8188-smi-larb
               - mediatek,mt8192-smi-larb
               - mediatek,mt8195-smi-larb
 
-- 
2.25.1


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[PATCH v4 2/4] memory: mtk-smi: Add return value for configure port function

[Chengci.Xu]

In MT8188, the register to enable/disable IOMMU can only be configured
in secure world by SMC call. We should add a return value for configure
port function for preparation because SMC call may return an error result.

Signed-off-by: Chengci.Xu <chengci.xu@mediatek.com>
---
 drivers/memory/mtk-smi.c | 20 +++++++++++++-------
 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
index d7cb7ead2ac7..08c1668d47bf 100644
--- a/drivers/memory/mtk-smi.c
+++ b/drivers/memory/mtk-smi.c
@@ -127,7 +127,7 @@ struct mtk_smi_common_plat {
 
 struct mtk_smi_larb_gen {
 	int port_in_larb[MTK_LARB_NR_MAX + 1];
-	void (*config_port)(struct device *dev);
+	int				(*config_port)(struct device *dev);
 	unsigned int			larb_direct_to_common_mask;
 	unsigned int			flags_general;
 	const u8			(*ostd)[SMI_LARB_PORT_NR_MAX];
@@ -185,7 +185,7 @@ static const struct component_ops mtk_smi_larb_component_ops = {
 	.unbind = mtk_smi_larb_unbind,
 };
 
-static void mtk_smi_larb_config_port_gen1(struct device *dev)
+static int mtk_smi_larb_config_port_gen1(struct device *dev)
 {
 	struct mtk_smi_larb *larb = dev_get_drvdata(dev);
 	const struct mtk_smi_larb_gen *larb_gen = larb->larb_gen;
@@ -214,23 +214,26 @@ static void mtk_smi_larb_config_port_gen1(struct device *dev)
 			common->smi_ao_base
 			+ REG_SMI_SECUR_CON_ADDR(m4u_port_id));
 	}
+	return 0;
 }
 
-static void mtk_smi_larb_config_port_mt8167(struct device *dev)
+static int mtk_smi_larb_config_port_mt8167(struct device *dev)
 {
 	struct mtk_smi_larb *larb = dev_get_drvdata(dev);
 
 	writel(*larb->mmu, larb->base + MT8167_SMI_LARB_MMU_EN);
+	return 0;
 }
 
-static void mtk_smi_larb_config_port_mt8173(struct device *dev)
+static int mtk_smi_larb_config_port_mt8173(struct device *dev)
 {
 	struct mtk_smi_larb *larb = dev_get_drvdata(dev);
 
 	writel(*larb->mmu, larb->base + MT8173_SMI_LARB_MMU_EN);
+	return 0;
 }
 
-static void mtk_smi_larb_config_port_gen2_general(struct device *dev)
+static int mtk_smi_larb_config_port_gen2_general(struct device *dev)
 {
 	struct mtk_smi_larb *larb = dev_get_drvdata(dev);
 	u32 reg, flags_general = larb->larb_gen->flags_general;
@@ -238,7 +241,7 @@ static void mtk_smi_larb_config_port_gen2_general(struct device *dev)
 	int i;
 
 	if (BIT(larb->larbid) & larb->larb_gen->larb_direct_to_common_mask)
-		return;
+		return 0;
 
 	if (MTK_SMI_CAPS(flags_general, MTK_SMI_FLAG_THRT_UPDATE)) {
 		reg = readl_relaxed(larb->base + SMI_LARB_CMD_THRT_CON);
@@ -259,6 +262,7 @@ static void mtk_smi_larb_config_port_gen2_general(struct device *dev)
 		reg |= BANK_SEL(larb->bank[i]);
 		writel(reg, larb->base + SMI_LARB_NONSEC_CON(i));
 	}
+	return 0;
 }
 
 static const u8 mtk_smi_larb_mt8195_ostd[][SMI_LARB_PORT_NR_MAX] = {
@@ -511,7 +515,9 @@ static int __maybe_unused mtk_smi_larb_resume(struct device *dev)
 		mtk_smi_larb_sleep_ctrl_disable(larb);
 
 	/* Configure the basic setting for this larb */
-	larb_gen->config_port(dev);
+	ret = larb_gen->config_port(dev);
+	if (ret)
+		return ret;
 
 	return 0;
 }
-- 
2.25.1


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[PATCH v4 3/4] memory: mtk-smi: Add enable IOMMU SMC command for MM master

[Chengci.Xu]

For concerns about security, the register to enable/disable IOMMU of
SMI LARB should only be configured in secure world. Thus, we add some
SMC command for multimedia master to enable/disable MM IOMMU in ATF by
setting the register of SMI LARB. This function is prepared for MT8188.

Signed-off-by: Chengci.Xu <chengci.xu@mediatek.com>
---
 drivers/memory/mtk-smi.c                 | 19 +++++++++++++++++++
 include/linux/soc/mediatek/mtk_sip_svc.h |  3 +++
 include/soc/mediatek/smi.h               |  5 +++++
 3 files changed, 27 insertions(+)

diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
index 08c1668d47bf..28e1123f9d76 100644
--- a/drivers/memory/mtk-smi.c
+++ b/drivers/memory/mtk-smi.c
@@ -3,6 +3,7 @@
  * Copyright (c) 2015-2016 MediaTek Inc.
  * Author: Yong Wu <yong.wu@mediatek.com>
  */
+#include <linux/arm-smccc.h>
 #include <linux/clk.h>
 #include <linux/component.h>
 #include <linux/device.h>
@@ -14,6 +15,7 @@
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
+#include <linux/soc/mediatek/mtk_sip_svc.h>
 #include <soc/mediatek/smi.h>
 #include <dt-bindings/memory/mt2701-larb-port.h>
 #include <dt-bindings/memory/mtk-memory-port.h>
@@ -89,6 +91,7 @@
 #define MTK_SMI_FLAG_THRT_UPDATE	BIT(0)
 #define MTK_SMI_FLAG_SW_FLAG		BIT(1)
 #define MTK_SMI_FLAG_SLEEP_CTL		BIT(2)
+#define MTK_SMI_FLAG_CFG_PORT_SEC_CTL	BIT(3)
 #define MTK_SMI_CAPS(flags, _x)		(!!((flags) & (_x)))
 
 struct mtk_smi_reg_pair {
@@ -238,6 +241,7 @@ static int mtk_smi_larb_config_port_gen2_general(struct device *dev)
 	struct mtk_smi_larb *larb = dev_get_drvdata(dev);
 	u32 reg, flags_general = larb->larb_gen->flags_general;
 	const u8 *larbostd = larb->larb_gen->ostd ? larb->larb_gen->ostd[larb->larbid] : NULL;
+	struct arm_smccc_res res;
 	int i;
 
 	if (BIT(larb->larbid) & larb->larb_gen->larb_direct_to_common_mask)
@@ -262,6 +266,21 @@ static int mtk_smi_larb_config_port_gen2_general(struct device *dev)
 		reg |= BANK_SEL(larb->bank[i]);
 		writel(reg, larb->base + SMI_LARB_NONSEC_CON(i));
 	}
+
+	/*
+	 * We still need to write above NONSEC_CON register for bank selection
+	 * even if enabling IOMMU is failed by SMC call. Otherwise, all master
+	 * will be configured to bank 0 with a state of IOMMU enable due to the
+	 * HW default value of register.
+	 */
+	if (MTK_SMI_CAPS(flags_general, MTK_SMI_FLAG_CFG_PORT_SEC_CTL)) {
+		arm_smccc_smc(MTK_SIP_KERNEL_IOMMU_CONTROL, IOMMU_ATF_CMD_CONFIG_SMI_LARB,
+			      larb->larbid, (u32)(*larb->mmu), 0, 0, 0, 0, &res);
+		if (res.a0 != 0) {
+			dev_err(dev, "Enable iommu fail, ret %ld\n", res.a0);
+			return -EINVAL;
+		}
+	}
 	return 0;
 }
 
diff --git a/include/linux/soc/mediatek/mtk_sip_svc.h b/include/linux/soc/mediatek/mtk_sip_svc.h
index 082398e0cfb1..0761128b4354 100644
--- a/include/linux/soc/mediatek/mtk_sip_svc.h
+++ b/include/linux/soc/mediatek/mtk_sip_svc.h
@@ -22,4 +22,7 @@
 	ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, MTK_SIP_SMC_CONVENTION, \
 			   ARM_SMCCC_OWNER_SIP, fn_id)
 
+/* IOMMU related SMC call */
+#define MTK_SIP_KERNEL_IOMMU_CONTROL	MTK_SIP_SMC_CMD(0x514)
+
 #endif
diff --git a/include/soc/mediatek/smi.h b/include/soc/mediatek/smi.h
index 11f7d6b59642..dfd8efca5e60 100644
--- a/include/soc/mediatek/smi.h
+++ b/include/soc/mediatek/smi.h
@@ -11,6 +11,11 @@
 
 #if IS_ENABLED(CONFIG_MTK_SMI)
 
+enum iommu_atf_cmd {
+	IOMMU_ATF_CMD_CONFIG_SMI_LARB,		/* For mm master to en/disable iommu */
+	IOMMU_ATF_CMD_MAX,
+};
+
 #define MTK_SMI_MMU_EN(port)	BIT(port)
 
 struct mtk_smi_larb_iommu {
-- 
2.25.1


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[PATCH v4 4/4] memory: mtk-smi: mt8188: Add SMI Support

[Chengci.Xu]

Add mt8188 smi common & larb support

Signed-off-by: Chengci.Xu <chengci.xu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 drivers/memory/mtk-smi.c | 71 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)

diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
index 28e1123f9d76..e7d9769a122a 100644
--- a/drivers/memory/mtk-smi.c
+++ b/drivers/memory/mtk-smi.c
@@ -284,6 +284,55 @@ static int mtk_smi_larb_config_port_gen2_general(struct device *dev)
 	return 0;
 }
 
+static const u8 mtk_smi_larb_mt8188_ostd[][SMI_LARB_PORT_NR_MAX] = {
+	[0] = {0x02, 0x18, 0x22, 0x22, 0x01, 0x02, 0x0a,},
+	[1] = {0x12, 0x02, 0x14, 0x14, 0x01, 0x18, 0x0a,},
+	[2] = {0x12, 0x12, 0x12, 0x12, 0x0a,},
+	[3] = {0x12, 0x12, 0x12, 0x12, 0x28, 0x28, 0x0a,},
+	[4] = {0x06, 0x01, 0x17, 0x06, 0x0a, 0x07, 0x07,},
+	[5] = {0x02, 0x01, 0x04, 0x02, 0x06, 0x01, 0x06, 0x0a,},
+	[6] = {0x06, 0x01, 0x06, 0x0a,},
+	[7] = {0x0c, 0x0c, 0x12,},
+	[8] = {0x0c, 0x01, 0x0a, 0x05, 0x02, 0x03, 0x01, 0x01, 0x14, 0x14,
+	       0x0a, 0x14, 0x1e, 0x01, 0x0c, 0x0a, 0x05, 0x02, 0x02, 0x05,
+	       0x03, 0x01, 0x1e, 0x01, 0x05,},
+	[9] = {0x1e, 0x01, 0x0a, 0x0a, 0x01, 0x01, 0x03, 0x1e, 0x1e, 0x10,
+	       0x07, 0x01, 0x0a, 0x06, 0x03, 0x03, 0x0e, 0x01, 0x04, 0x28,},
+	[10] = {0x03, 0x20, 0x01, 0x20, 0x01, 0x01, 0x14, 0x0a, 0x0a, 0x0c,
+		0x0a, 0x05, 0x02, 0x03, 0x02, 0x14, 0x0a, 0x0a, 0x14, 0x14,
+		0x14, 0x01, 0x01, 0x14, 0x1e, 0x01, 0x05, 0x03, 0x02, 0x28,},
+	[11] = {0x03, 0x20, 0x01, 0x20, 0x01, 0x01, 0x14, 0x0a, 0x0a, 0x0c,
+		0x0a, 0x05, 0x02, 0x03, 0x02, 0x14, 0x0a, 0x0a, 0x14, 0x14,
+		0x14, 0x01, 0x01, 0x14, 0x1e, 0x01, 0x05, 0x03, 0x02, 0x28,},
+	[12] = {0x03, 0x20, 0x01, 0x20, 0x01, 0x01, 0x14, 0x0a, 0x0a, 0x0c,
+		0x0a, 0x05, 0x02, 0x03, 0x02, 0x14, 0x0a, 0x0a, 0x14, 0x14,
+		0x14, 0x01, 0x01, 0x14, 0x1e, 0x01, 0x05, 0x03, 0x02, 0x28,},
+	[13] = {0x07, 0x02, 0x04, 0x02, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05,
+		0x07, 0x02, 0x04, 0x02, 0x05, 0x05,},
+	[14] = {0x02, 0x02, 0x0c, 0x0c, 0x0c, 0x0c, 0x01, 0x01, 0x02, 0x02,
+		0x02, 0x02, 0x0c, 0x0c, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
+		0x02, 0x02, 0x01, 0x01,},
+	[15] = {0x0c, 0x0c, 0x02, 0x02, 0x02, 0x02, 0x01, 0x01, 0x0c, 0x0c,
+		0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x01, 0x02,
+		0x0c, 0x01, 0x01,},
+	[16] = {0x28, 0x28, 0x03, 0x01, 0x01, 0x03, 0x14, 0x14, 0x0a, 0x0d,
+		0x03, 0x05, 0x0e, 0x01, 0x01, 0x05, 0x06, 0x0d, 0x01,},
+	[17] = {0x28, 0x02, 0x02, 0x12, 0x02, 0x12, 0x10, 0x02, 0x02, 0x0a,
+		0x12, 0x02, 0x02, 0x0a, 0x16, 0x02, 0x04,},
+	[18] = {0x28, 0x02, 0x02, 0x12, 0x02, 0x12, 0x10, 0x02, 0x02, 0x0a,
+		0x12, 0x02, 0x02, 0x0a, 0x16, 0x02, 0x04,},
+	[19] = {0x1a, 0x0e, 0x0a, 0x0a, 0x0c, 0x0e, 0x10,},
+	[20] = {0x1a, 0x0e, 0x0a, 0x0a, 0x0c, 0x0e, 0x10,},
+	[21] = {0x01, 0x04, 0x01, 0x01, 0x01, 0x01, 0x01, 0x04, 0x04, 0x01,
+		0x01, 0x01, 0x04, 0x0a, 0x06, 0x01, 0x01, 0x01, 0x0a, 0x06,
+		0x01, 0x01, 0x05, 0x03, 0x03, 0x04, 0x01,},
+	[22] = {0x28, 0x19, 0x0c, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x04,
+		0x01,},
+	[23] = {0x01, 0x01, 0x04, 0x01, 0x01, 0x01, 0x18, 0x01, 0x01,},
+	[24] = {0x12, 0x06, 0x12, 0x06,},
+	[25] = {0x01},
+};
+
 static const u8 mtk_smi_larb_mt8195_ostd[][SMI_LARB_PORT_NR_MAX] = {
 	[0] = {0x0a, 0xc, 0x22, 0x22, 0x01, 0x0a,}, /* larb0 */
 	[1] = {0x0a, 0xc, 0x22, 0x22, 0x01, 0x0a,}, /* larb1 */
@@ -370,6 +419,13 @@ static const struct mtk_smi_larb_gen mtk_smi_larb_mt8186 = {
 	.flags_general	            = MTK_SMI_FLAG_SLEEP_CTL,
 };
 
+static const struct mtk_smi_larb_gen mtk_smi_larb_mt8188 = {
+	.config_port                = mtk_smi_larb_config_port_gen2_general,
+	.flags_general	            = MTK_SMI_FLAG_THRT_UPDATE | MTK_SMI_FLAG_SW_FLAG |
+				      MTK_SMI_FLAG_SLEEP_CTL | MTK_SMI_FLAG_CFG_PORT_SEC_CTL,
+	.ostd		            = mtk_smi_larb_mt8188_ostd,
+};
+
 static const struct mtk_smi_larb_gen mtk_smi_larb_mt8192 = {
 	.config_port                = mtk_smi_larb_config_port_gen2_general,
 };
@@ -390,6 +446,7 @@ static const struct of_device_id mtk_smi_larb_of_ids[] = {
 	{.compatible = "mediatek,mt8173-smi-larb", .data = &mtk_smi_larb_mt8173},
 	{.compatible = "mediatek,mt8183-smi-larb", .data = &mtk_smi_larb_mt8183},
 	{.compatible = "mediatek,mt8186-smi-larb", .data = &mtk_smi_larb_mt8186},
+	{.compatible = "mediatek,mt8188-smi-larb", .data = &mtk_smi_larb_mt8188},
 	{.compatible = "mediatek,mt8192-smi-larb", .data = &mtk_smi_larb_mt8192},
 	{.compatible = "mediatek,mt8195-smi-larb", .data = &mtk_smi_larb_mt8195},
 	{}
@@ -622,6 +679,18 @@ static const struct mtk_smi_common_plat mtk_smi_common_mt8186 = {
 	.bus_sel  = F_MMU1_LARB(1) | F_MMU1_LARB(4) | F_MMU1_LARB(7),
 };
 
+static const struct mtk_smi_common_plat mtk_smi_common_mt8188_vdo = {
+	.type     = MTK_SMI_GEN2,
+	.bus_sel  = F_MMU1_LARB(1) | F_MMU1_LARB(5) | F_MMU1_LARB(7),
+	.init     = mtk_smi_common_mt8195_init,
+};
+
+static const struct mtk_smi_common_plat mtk_smi_common_mt8188_vpp = {
+	.type     = MTK_SMI_GEN2,
+	.bus_sel  = F_MMU1_LARB(1) | F_MMU1_LARB(2) | F_MMU1_LARB(7),
+	.init     = mtk_smi_common_mt8195_init,
+};
+
 static const struct mtk_smi_common_plat mtk_smi_common_mt8192 = {
 	.type     = MTK_SMI_GEN2,
 	.has_gals = true,
@@ -658,6 +727,8 @@ static const struct of_device_id mtk_smi_common_of_ids[] = {
 	{.compatible = "mediatek,mt8173-smi-common", .data = &mtk_smi_common_gen2},
 	{.compatible = "mediatek,mt8183-smi-common", .data = &mtk_smi_common_mt8183},
 	{.compatible = "mediatek,mt8186-smi-common", .data = &mtk_smi_common_mt8186},
+	{.compatible = "mediatek,mt8188-smi-common-vdo", .data = &mtk_smi_common_mt8188_vdo},
+	{.compatible = "mediatek,mt8188-smi-common-vpp", .data = &mtk_smi_common_mt8188_vpp},
 	{.compatible = "mediatek,mt8192-smi-common", .data = &mtk_smi_common_mt8192},
 	{.compatible = "mediatek,mt8195-smi-common-vdo", .data = &mtk_smi_common_mt8195_vdo},
 	{.compatible = "mediatek,mt8195-smi-common-vpp", .data = &mtk_smi_common_mt8195_vpp},
-- 
2.25.1


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Re: [PATCH v4 3/4] memory: mtk-smi: Add enable IOMMU SMC command for MM master

[Yong Wu]

On Mon, 2022-08-01 at 10:18 +0800, Chengci.Xu wrote:
> For concerns about security, the register to enable/disable IOMMU of
> SMI LARB should only be configured in secure world. Thus, we add some
> SMC command for multimedia master to enable/disable MM IOMMU in ATF
> by
> setting the register of SMI LARB. This function is prepared for
> MT8188.
> 
> Signed-off-by: Chengci.Xu <chengci.xu@mediatek.com>
> ---
>  drivers/memory/mtk-smi.c                 | 19 +++++++++++++++++++
>  include/linux/soc/mediatek/mtk_sip_svc.h |  3 +++
>  include/soc/mediatek/smi.h               |  5 +++++
>  3 files changed, 27 insertions(+)
> 
> diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
> index 08c1668d47bf..28e1123f9d76 100644
> --- a/drivers/memory/mtk-smi.c
> +++ b/drivers/memory/mtk-smi.c
> @@ -3,6 +3,7 @@
>   * Copyright (c) 2015-2016 MediaTek Inc.
>   * Author: Yong Wu <yong.wu@mediatek.com>
>   */
> +#include <linux/arm-smccc.h>
>  #include <linux/clk.h>
>  #include <linux/component.h>
>  #include <linux/device.h>
> @@ -14,6 +15,7 @@
>  #include <linux/of_platform.h>
>  #include <linux/platform_device.h>
>  #include <linux/pm_runtime.h>
> +#include <linux/soc/mediatek/mtk_sip_svc.h>
>  #include <soc/mediatek/smi.h>
>  #include <dt-bindings/memory/mt2701-larb-port.h>
>  #include <dt-bindings/memory/mtk-memory-port.h>
> @@ -89,6 +91,7 @@
>  #define MTK_SMI_FLAG_THRT_UPDATE	BIT(0)
>  #define MTK_SMI_FLAG_SW_FLAG		BIT(1)
>  #define MTK_SMI_FLAG_SLEEP_CTL		BIT(2)
> +#define MTK_SMI_FLAG_CFG_PORT_SEC_CTL	BIT(3)
>  #define MTK_SMI_CAPS(flags, _x)		(!!((flags) & (_x)))
>  
>  struct mtk_smi_reg_pair {
> @@ -238,6 +241,7 @@ static int
> mtk_smi_larb_config_port_gen2_general(struct device *dev)
>  	struct mtk_smi_larb *larb = dev_get_drvdata(dev);
>  	u32 reg, flags_general = larb->larb_gen->flags_general;
>  	const u8 *larbostd = larb->larb_gen->ostd ? larb->larb_gen-
> >ostd[larb->larbid] : NULL;
> +	struct arm_smccc_res res;
>  	int i;
>  
>  	if (BIT(larb->larbid) & larb->larb_gen-
> >larb_direct_to_common_mask)
> @@ -262,6 +266,21 @@ static int
> mtk_smi_larb_config_port_gen2_general(struct device *dev)
>  		reg |= BANK_SEL(larb->bank[i]);
>  		writel(reg, larb->base + SMI_LARB_NONSEC_CON(i));
>  	}
> +
> +	/*
> +	 * We still need to write above NONSEC_CON register for bank
> selection
> +	 * even if enabling IOMMU is failed by SMC call. Otherwise, all
> master
> +	 * will be configured to bank 0 with a state of IOMMU enable
> due to the
> +	 * HW default value of register.

I don't understand this. Does bankX(X!=0) make sense if SMC fail? 

I guess the below segment should be before SMI_LARB_NONSEC_CON. It
means we shouldn't touch bank_sel while SMC fail.

Just add a comment like:
/* When mmu_en bits are in security world, the bank_sel still is in the
LARB_NONSEC_CON below. and the mmu_en of LARB_NONSEC_CON have no effect
in this case. */

> +	 */
> +	if (MTK_SMI_CAPS(flags_general, MTK_SMI_FLAG_CFG_PORT_SEC_CTL))
> {
> +		arm_smccc_smc(MTK_SIP_KERNEL_IOMMU_CONTROL,
> IOMMU_ATF_CMD_CONFIG_SMI_LARB,
> +			      larb->larbid, (u32)(*larb->mmu), 0, 0, 0,

The type of mmu is "u32", no need the "(u32)".

> 0, &res);
> +		if (res.a0 != 0) {
> +			dev_err(dev, "Enable iommu fail, ret %ld\n",
> res.a0);
> +			return -EINVAL;
> +		}
> +	}
>  	return 0;
>  }
>  
> diff --git a/include/linux/soc/mediatek/mtk_sip_svc.h
> b/include/linux/soc/mediatek/mtk_sip_svc.h
> index 082398e0cfb1..0761128b4354 100644
> --- a/include/linux/soc/mediatek/mtk_sip_svc.h
> +++ b/include/linux/soc/mediatek/mtk_sip_svc.h
> @@ -22,4 +22,7 @@
>  	ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, MTK_SIP_SMC_CONVENTION,
> \
>  			   ARM_SMCCC_OWNER_SIP, fn_id)
>  
> +/* IOMMU related SMC call */
> +#define MTK_SIP_KERNEL_IOMMU_CONTROL	MTK_SIP_SMC_CMD(0x514)
> +
>  #endif
> diff --git a/include/soc/mediatek/smi.h b/include/soc/mediatek/smi.h
> index 11f7d6b59642..dfd8efca5e60 100644
> --- a/include/soc/mediatek/smi.h
> +++ b/include/soc/mediatek/smi.h
> @@ -11,6 +11,11 @@
>  
>  #if IS_ENABLED(CONFIG_MTK_SMI)
>  
> +enum iommu_atf_cmd {
> +	IOMMU_ATF_CMD_CONFIG_SMI_LARB,		/* For mm master to
> en/disable iommu */
> +	IOMMU_ATF_CMD_MAX,
> +};
> +
>  #define MTK_SMI_MMU_EN(port)	BIT(port)
>  
>  struct mtk_smi_larb_iommu {


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Re: [PATCH v4 4/4] memory: mtk-smi: mt8188: Add SMI Support

[Yong Wu]

On Mon, 2022-08-01 at 10:18 +0800, Chengci.Xu wrote:
> Add mt8188 smi common & larb support
> 
> Signed-off-by: Chengci.Xu <chengci.xu@mediatek.com>
> Reviewed-by: AngeloGioacchino Del Regno <
> angelogioacchino.delregno@collabora.com>
> 

Reviewed-by: Yong Wu <yong.wu@mediatek.com>

I remembered I have given this.


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Re: [PATCH v4 2/4] memory: mtk-smi: Add return value for configure port function

[Yong Wu]

On Mon, 2022-08-01 at 10:18 +0800, Chengci.Xu wrote:
> In MT8188, the register to enable/disable IOMMU can only be
> configured
> in secure world by SMC call. We should add a return value for
> configure
> port function for preparation because SMC call may return an error
> result.
> 
> Signed-off-by: Chengci.Xu <chengci.xu@mediatek.com>
> ---
>  drivers/memory/mtk-smi.c | 20 +++++++++++++-------
>  1 file changed, 13 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
> index d7cb7ead2ac7..08c1668d47bf 100644
> --- a/drivers/memory/mtk-smi.c
> +++ b/drivers/memory/mtk-smi.c
> @@ -127,7 +127,7 @@ struct mtk_smi_common_plat {
>  
>  struct mtk_smi_larb_gen {
>  	int port_in_larb[MTK_LARB_NR_MAX + 1];
> -	void (*config_port)(struct device *dev);
> +	int				(*config_port)(struct device
> *dev);
>  	unsigned int			larb_direct_to_common_mask;
>  	unsigned int			flags_general;
>  	const u8			(*ostd)[SMI_LARB_PORT_NR_MAX];
> @@ -185,7 +185,7 @@ static const struct component_ops
> mtk_smi_larb_component_ops = {
>  	.unbind = mtk_smi_larb_unbind,
>  };
>  
> -static void mtk_smi_larb_config_port_gen1(struct device *dev)
> +static int mtk_smi_larb_config_port_gen1(struct device *dev)
>  {
>  	struct mtk_smi_larb *larb = dev_get_drvdata(dev);
>  	const struct mtk_smi_larb_gen *larb_gen = larb->larb_gen;
> @@ -214,23 +214,26 @@ static void
> mtk_smi_larb_config_port_gen1(struct device *dev)
>  			common->smi_ao_base
>  			+ REG_SMI_SECUR_CON_ADDR(m4u_port_id));
>  	}
> +	return 0;
>  }
>  
> -static void mtk_smi_larb_config_port_mt8167(struct device *dev)
> +static int mtk_smi_larb_config_port_mt8167(struct device *dev)
>  {
>  	struct mtk_smi_larb *larb = dev_get_drvdata(dev);
>  
>  	writel(*larb->mmu, larb->base + MT8167_SMI_LARB_MMU_EN);
> +	return 0;
>  }
>  
> -static void mtk_smi_larb_config_port_mt8173(struct device *dev)
> +static int mtk_smi_larb_config_port_mt8173(struct device *dev)
>  {
>  	struct mtk_smi_larb *larb = dev_get_drvdata(dev);
>  
>  	writel(*larb->mmu, larb->base + MT8173_SMI_LARB_MMU_EN);
> +	return 0;
>  }
>  
> -static void mtk_smi_larb_config_port_gen2_general(struct device
> *dev)
> +static int mtk_smi_larb_config_port_gen2_general(struct device *dev)
>  {
>  	struct mtk_smi_larb *larb = dev_get_drvdata(dev);
>  	u32 reg, flags_general = larb->larb_gen->flags_general;
> @@ -238,7 +241,7 @@ static void
> mtk_smi_larb_config_port_gen2_general(struct device *dev)
>  	int i;
>  
>  	if (BIT(larb->larbid) & larb->larb_gen-
> >larb_direct_to_common_mask)
> -		return;
> +		return 0;
>  
>  	if (MTK_SMI_CAPS(flags_general, MTK_SMI_FLAG_THRT_UPDATE)) {
>  		reg = readl_relaxed(larb->base +
> SMI_LARB_CMD_THRT_CON);
> @@ -259,6 +262,7 @@ static void
> mtk_smi_larb_config_port_gen2_general(struct device *dev)
>  		reg |= BANK_SEL(larb->bank[i]);
>  		writel(reg, larb->base + SMI_LARB_NONSEC_CON(i));
>  	}
> +	return 0;
>  }
>  
>  static const u8 mtk_smi_larb_mt8195_ostd[][SMI_LARB_PORT_NR_MAX] = {
> @@ -511,7 +515,9 @@ static int __maybe_unused
> mtk_smi_larb_resume(struct device *dev)
>  		mtk_smi_larb_sleep_ctrl_disable(larb);
>  
>  	/* Configure the basic setting for this larb */
> -	larb_gen->config_port(dev);
> +	ret = larb_gen->config_port(dev);
> +	if (ret)
> +		return ret;

return larb_gen->config_port(dev);

After this,

Reviewed-by: Yong Wu <yong.wu@mediatek.com>

>  
>  	return 0;
>  }


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Re: [PATCH v4 3/4] memory: mtk-smi: Add enable IOMMU SMC command for MM master

[Chengci.Xu]

On Tue, 2022-08-09 at 13:58 +0800, Yong Wu wrote:
> On Mon, 2022-08-01 at 10:18 +0800, Chengci.Xu wrote:
> > For concerns about security, the register to enable/disable IOMMU
> > of
> > SMI LARB should only be configured in secure world. Thus, we add
> > some
> > SMC command for multimedia master to enable/disable MM IOMMU in ATF
> > by
> > setting the register of SMI LARB. This function is prepared for
> > MT8188.
> > 
> > Signed-off-by: Chengci.Xu <chengci.xu@mediatek.com>
> > ---
> >  drivers/memory/mtk-smi.c                 | 19 +++++++++++++++++++
> >  include/linux/soc/mediatek/mtk_sip_svc.h |  3 +++
> >  include/soc/mediatek/smi.h               |  5 +++++
> >  3 files changed, 27 insertions(+)
> > 
> > diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
> > index 08c1668d47bf..28e1123f9d76 100644
> > --- a/drivers/memory/mtk-smi.c
> > +++ b/drivers/memory/mtk-smi.c
> > @@ -3,6 +3,7 @@
> >   * Copyright (c) 2015-2016 MediaTek Inc.
> >   * Author: Yong Wu <yong.wu@mediatek.com>
> >   */
> > +#include <linux/arm-smccc.h>
> >  #include <linux/clk.h>
> >  #include <linux/component.h>
> >  #include <linux/device.h>
> > @@ -14,6 +15,7 @@
> >  #include <linux/of_platform.h>
> >  #include <linux/platform_device.h>
> >  #include <linux/pm_runtime.h>
> > +#include <linux/soc/mediatek/mtk_sip_svc.h>
> >  #include <soc/mediatek/smi.h>
> >  #include <dt-bindings/memory/mt2701-larb-port.h>
> >  #include <dt-bindings/memory/mtk-memory-port.h>
> > @@ -89,6 +91,7 @@
> >  #define MTK_SMI_FLAG_THRT_UPDATE	BIT(0)
> >  #define MTK_SMI_FLAG_SW_FLAG		BIT(1)
> >  #define MTK_SMI_FLAG_SLEEP_CTL		BIT(2)
> > +#define MTK_SMI_FLAG_CFG_PORT_SEC_CTL	BIT(3)
> >  #define MTK_SMI_CAPS(flags, _x)		(!!((flags) & (_x)))
> >  
> >  struct mtk_smi_reg_pair {
> > @@ -238,6 +241,7 @@ static int
> > mtk_smi_larb_config_port_gen2_general(struct device *dev)
> >  	struct mtk_smi_larb *larb = dev_get_drvdata(dev);
> >  	u32 reg, flags_general = larb->larb_gen->flags_general;
> >  	const u8 *larbostd = larb->larb_gen->ostd ? larb->larb_gen-
> > > ostd[larb->larbid] : NULL;
> > 
> > +	struct arm_smccc_res res;
> >  	int i;
> >  
> >  	if (BIT(larb->larbid) & larb->larb_gen-
> > > larb_direct_to_common_mask)
> > 
> > @@ -262,6 +266,21 @@ static int
> > mtk_smi_larb_config_port_gen2_general(struct device *dev)
> >  		reg |= BANK_SEL(larb->bank[i]);
> >  		writel(reg, larb->base + SMI_LARB_NONSEC_CON(i));
> >  	}
> > +
> > +	/*
> > +	 * We still need to write above NONSEC_CON register for bank
> > selection
> > +	 * even if enabling IOMMU is failed by SMC call. Otherwise, all
> > master
> > +	 * will be configured to bank 0 with a state of IOMMU enable
> > due to the
> > +	 * HW default value of register.
> 
> I don't understand this. Does bankX(X!=0) make sense if SMC fail? 
> 
> I guess the below segment should be before SMI_LARB_NONSEC_CON. It
> means we shouldn't touch bank_sel while SMC fail.

If SMC call failed, we do have no need to configure bank_sel. All we
can do is stop following step and report an error. So it is a good
choice to put the code about MTK_SMI_FLAG_CFG_PORT_SEC_CTL in front of
SMI_LARB_NONSEC_CON. I will do it in next version.

> 
> Just add a comment like:
> /* When mmu_en bits are in security world, the bank_sel still is in
> the
> LARB_NONSEC_CON below. and the mmu_en of LARB_NONSEC_CON have no
> effect
> in this case. */

OK, got it, thanks.

> 
> > +	 */
> > +	if (MTK_SMI_CAPS(flags_general, MTK_SMI_FLAG_CFG_PORT_SEC_CTL))
> > {
> > +		arm_smccc_smc(MTK_SIP_KERNEL_IOMMU_CONTROL,
> > IOMMU_ATF_CMD_CONFIG_SMI_LARB,
> > +			      larb->larbid, (u32)(*larb->mmu), 0, 0, 0,
> 
> The type of mmu is "u32", no need the "(u32)".
> 
> > 0, &res);
> > +		if (res.a0 != 0) {
> > +			dev_err(dev, "Enable iommu fail, ret %ld\n",
> > res.a0);
> > +			return -EINVAL;
> > +		}
> > +	}
> >  	return 0;
> >  }
> >  
> > diff --git a/include/linux/soc/mediatek/mtk_sip_svc.h
> > b/include/linux/soc/mediatek/mtk_sip_svc.h
> > index 082398e0cfb1..0761128b4354 100644
> > --- a/include/linux/soc/mediatek/mtk_sip_svc.h
> > +++ b/include/linux/soc/mediatek/mtk_sip_svc.h
> > @@ -22,4 +22,7 @@
> >  	ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, MTK_SIP_SMC_CONVENTION,
> > \
> >  			   ARM_SMCCC_OWNER_SIP, fn_id)
> >  
> > +/* IOMMU related SMC call */
> > +#define MTK_SIP_KERNEL_IOMMU_CONTROL	MTK_SIP_SMC_CMD(0x514)
> > +
> >  #endif
> > diff --git a/include/soc/mediatek/smi.h
> > b/include/soc/mediatek/smi.h
> > index 11f7d6b59642..dfd8efca5e60 100644
> > --- a/include/soc/mediatek/smi.h
> > +++ b/include/soc/mediatek/smi.h
> > @@ -11,6 +11,11 @@
> >  
> >  #if IS_ENABLED(CONFIG_MTK_SMI)
> >  
> > +enum iommu_atf_cmd {
> > +	IOMMU_ATF_CMD_CONFIG_SMI_LARB,		/* For mm master to
> > en/disable iommu */
> > +	IOMMU_ATF_CMD_MAX,
> > +};
> > +
> >  #define MTK_SMI_MMU_EN(port)	BIT(port)
> >  
> >  struct mtk_smi_larb_iommu {
> 
> 


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