iommu/mediatek: Add mt8183 IOMMU support

The M4U IP blocks in mt8183 is MediaTek's generation2 M4U which use
the ARM Short-descriptor like mt8173, and most of the HW registers
are the same.

Here list main differences between mt8183 and mt8173/mt2712:
1) mt8183 has only one M4U HW like mt8173 while mt2712 has two.
2) mt8183 don't have the "bclk" clock, it use the EMI clock instead.
3) mt8183 can support the dram over 4GB, but it doesn't call this "4GB
mode".
4) mt8183 pgtable base register(0x0) extend bit[1:0] which represent
the bit[33:32] in the physical address of the pgtable base, But the
standard ttbr0[1] means the S bit which is enabled defaultly, Hence,
we add a mask.
5) mt8183 HW has a GALS modules, SMI should enable "has_gals" support.
6) mt8183 need reset_axi like mt8173.
7) the larb-id in smi-common is remapped. M4U should add its larbid_remap.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: Evan Green <evgreen@chromium.org>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

drivers/memory/mtk-smi.c

@@ -277,6 +277,13 @@ static const struct mtk_smi_larb_gen mtk_smi_larb_mt2712 = {
 	.larb_direct_to_common_mask = BIT(8) | BIT(9),      /* bdpsys */
 };
 
+static const struct mtk_smi_larb_gen mtk_smi_larb_mt8183 = {
+	.has_gals                   = true,
+	.config_port                = mtk_smi_larb_config_port_gen2_general,
+	.larb_direct_to_common_mask = BIT(2) | BIT(3) | BIT(7),
+				      /* IPU0 | IPU1 | CCU */
+};
+
 static const struct of_device_id mtk_smi_larb_of_ids[] = {
 	{
 		.compatible = "mediatek,mt8173-smi-larb",
@@ -290,6 +297,10 @@ static const struct of_device_id mtk_smi_larb_of_ids[] = {
 		.compatible = "mediatek,mt2712-smi-larb",
 		.data = &mtk_smi_larb_mt2712
 	},
+	{
+		.compatible = "mediatek,mt8183-smi-larb",
+		.data = &mtk_smi_larb_mt8183
+	},
 	{}
 };
 
@@ -383,6 +394,11 @@ static const struct mtk_smi_common_plat mtk_smi_common_gen2 = {
 	.gen = MTK_SMI_GEN2,
 };
 
+static const struct mtk_smi_common_plat mtk_smi_common_mt8183 = {
+	.gen      = MTK_SMI_GEN2,
+	.has_gals = true,
+};
+
 static const struct of_device_id mtk_smi_common_of_ids[] = {
 	{
 		.compatible = "mediatek,mt8173-smi-common",
@@ -396,6 +412,10 @@ static const struct of_device_id mtk_smi_common_of_ids[] = {
 		.compatible = "mediatek,mt2712-smi-common",
 		.data = &mtk_smi_common_gen2,
 	},
+	{
+		.compatible = "mediatek,mt8183-smi-common",
+		.data = &mtk_smi_common_mt8183,
+	},
 	{}
 };