Merge branch 'for-joerg/mtk' into for-joerg/arm-smmu/updates

Merge in Mediatek support from Yong Wu which introduces significant
changes to the TLB invalidation and Arm short-descriptor code in the
io-pgtable layer.

* for-joerg/mtk: (40 commits)
  MAINTAINERS: Add entry for MediaTek IOMMU
  iommu/mediatek: Add mt8192 support
  iommu/mediatek: Remove unnecessary check in attach_device
  iommu/mediatek: Support master use iova over 32bit
  iommu/mediatek: Add iova reserved function
  iommu/mediatek: Support for multi domains
  iommu/mediatek: Add get_domain_id from dev->dma_range_map
  iommu/mediatek: Add iova_region structure
  iommu/mediatek: Move geometry.aperture updating into domain_finalise
  iommu/mediatek: Move domain_finalise into attach_device
  iommu/mediatek: Adjust the structure
  iommu/mediatek: Support report iova 34bit translation fault in ISR
  iommu/mediatek: Support up to 34bit iova in tlb flush
  iommu/mediatek: Add power-domain operation
  iommu/mediatek: Add pm runtime callback
  iommu/mediatek: Add device link for smi-common and m4u
  iommu/mediatek: Add error handle for mtk_iommu_probe
  iommu/mediatek: Move hw_init into attach_device
  iommu/mediatek: Update oas for v7s
  iommu/mediatek: Add a flag for iova 34bits case
  ...

7 files changed, 379 insertions, 149 deletions

diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index baebaac34a83..8594b4a83043 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -2306,7 +2306,7 @@ static void arm_smmu_iotlb_sync(struct iommu_domain *domain,
 	struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
 
 	arm_smmu_tlb_inv_range_domain(gather->start,
-				      gather->end - gather->start,
+				      gather->end - gather->start + 1,
 				      gather->pgsize, true, smmu_domain);
 }
 
diff --git a/drivers/iommu/io-pgtable-arm-v7s.c b/drivers/iommu/io-pgtable-arm-v7s.c
index 1d92ac948db7..d4004bcf333a 100644
--- a/drivers/iommu/io-pgtable-arm-v7s.c
+++ b/drivers/iommu/io-pgtable-arm-v7s.c
@@ -44,26 +44,25 @@
 
 /*
  * We have 32 bits total; 12 bits resolved at level 1, 8 bits at level 2,
- * and 12 bits in a page. With some carefully-chosen coefficients we can
- * hide the ugly inconsistencies behind these macros and at least let the
- * rest of the code pretend to be somewhat sane.
+ * and 12 bits in a page.
+ * MediaTek extend 2 bits to reach 34bits, 14 bits at lvl1 and 8 bits at lvl2.
  */
 #define ARM_V7S_ADDR_BITS		32
-#define _ARM_V7S_LVL_BITS(lvl)		(16 - (lvl) * 4)
-#define ARM_V7S_LVL_SHIFT(lvl)		(ARM_V7S_ADDR_BITS - (4 + 8 * (lvl)))
+#define _ARM_V7S_LVL_BITS(lvl, cfg)	((lvl) == 1 ? ((cfg)->ias - 20) : 8)
+#define ARM_V7S_LVL_SHIFT(lvl)		((lvl) == 1 ? 20 : 12)
 #define ARM_V7S_TABLE_SHIFT		10
 
-#define ARM_V7S_PTES_PER_LVL(lvl)	(1 << _ARM_V7S_LVL_BITS(lvl))
-#define ARM_V7S_TABLE_SIZE(lvl)						\
-	(ARM_V7S_PTES_PER_LVL(lvl) * sizeof(arm_v7s_iopte))
+#define ARM_V7S_PTES_PER_LVL(lvl, cfg)	(1 << _ARM_V7S_LVL_BITS(lvl, cfg))
+#define ARM_V7S_TABLE_SIZE(lvl, cfg)						\
+	(ARM_V7S_PTES_PER_LVL(lvl, cfg) * sizeof(arm_v7s_iopte))
 
 #define ARM_V7S_BLOCK_SIZE(lvl)		(1UL << ARM_V7S_LVL_SHIFT(lvl))
 #define ARM_V7S_LVL_MASK(lvl)		((u32)(~0U << ARM_V7S_LVL_SHIFT(lvl)))
 #define ARM_V7S_TABLE_MASK		((u32)(~0U << ARM_V7S_TABLE_SHIFT))
-#define _ARM_V7S_IDX_MASK(lvl)		(ARM_V7S_PTES_PER_LVL(lvl) - 1)
-#define ARM_V7S_LVL_IDX(addr, lvl)	({				\
+#define _ARM_V7S_IDX_MASK(lvl, cfg)	(ARM_V7S_PTES_PER_LVL(lvl, cfg) - 1)
+#define ARM_V7S_LVL_IDX(addr, lvl, cfg)	({				\
 	int _l = lvl;							\
-	((u32)(addr) >> ARM_V7S_LVL_SHIFT(_l)) & _ARM_V7S_IDX_MASK(_l); \
+	((addr) >> ARM_V7S_LVL_SHIFT(_l)) & _ARM_V7S_IDX_MASK(_l, cfg); \
 })
 
 /*
@@ -112,9 +111,10 @@
 #define ARM_V7S_TEX_MASK		0x7
 #define ARM_V7S_ATTR_TEX(val)		(((val) & ARM_V7S_TEX_MASK) << ARM_V7S_TEX_SHIFT)
 
-/* MediaTek extend the two bits for PA 32bit/33bit */
+/* MediaTek extend the bits below for PA 32bit/33bit/34bit */
 #define ARM_V7S_ATTR_MTK_PA_BIT32	BIT(9)
 #define ARM_V7S_ATTR_MTK_PA_BIT33	BIT(4)
+#define ARM_V7S_ATTR_MTK_PA_BIT34	BIT(5)
 
 /* *well, except for TEX on level 2 large pages, of course :( */
 #define ARM_V7S_CONT_PAGE_TEX_SHIFT	6
@@ -194,6 +194,8 @@ static arm_v7s_iopte paddr_to_iopte(phys_addr_t paddr, int lvl,
 		pte |= ARM_V7S_ATTR_MTK_PA_BIT32;
 	if (paddr & BIT_ULL(33))
 		pte |= ARM_V7S_ATTR_MTK_PA_BIT33;
+	if (paddr & BIT_ULL(34))
+		pte |= ARM_V7S_ATTR_MTK_PA_BIT34;
 	return pte;
 }
 
@@ -218,6 +220,8 @@ static phys_addr_t iopte_to_paddr(arm_v7s_iopte pte, int lvl,
 		paddr |= BIT_ULL(32);
 	if (pte & ARM_V7S_ATTR_MTK_PA_BIT33)
 		paddr |= BIT_ULL(33);
+	if (pte & ARM_V7S_ATTR_MTK_PA_BIT34)
+		paddr |= BIT_ULL(34);
 	return paddr;
 }
 
@@ -234,7 +238,7 @@ static void *__arm_v7s_alloc_table(int lvl, gfp_t gfp,
 	struct device *dev = cfg->iommu_dev;
 	phys_addr_t phys;
 	dma_addr_t dma;
-	size_t size = ARM_V7S_TABLE_SIZE(lvl);
+	size_t size = ARM_V7S_TABLE_SIZE(lvl, cfg);
 	void *table = NULL;
 
 	if (lvl == 1)
@@ -280,7 +284,7 @@ static void __arm_v7s_free_table(void *table, int lvl,
 {
 	struct io_pgtable_cfg *cfg = &data->iop.cfg;
 	struct device *dev = cfg->iommu_dev;
-	size_t size = ARM_V7S_TABLE_SIZE(lvl);
+	size_t size = ARM_V7S_TABLE_SIZE(lvl, cfg);
 
 	if (!cfg->coherent_walk)
 		dma_unmap_single(dev, __arm_v7s_dma_addr(table), size,
@@ -424,7 +428,7 @@ static int arm_v7s_init_pte(struct arm_v7s_io_pgtable *data,
 			arm_v7s_iopte *tblp;
 			size_t sz = ARM_V7S_BLOCK_SIZE(lvl);
 
-			tblp = ptep - ARM_V7S_LVL_IDX(iova, lvl);
+			tblp = ptep - ARM_V7S_LVL_IDX(iova, lvl, cfg);
 			if (WARN_ON(__arm_v7s_unmap(data, NULL, iova + i * sz,
 						    sz, lvl, tblp) != sz))
 				return -EINVAL;
@@ -477,7 +481,7 @@ static int __arm_v7s_map(struct arm_v7s_io_pgtable *data, unsigned long iova,
 	int num_entries = size >> ARM_V7S_LVL_SHIFT(lvl);
 
 	/* Find our entry at the current level */
-	ptep += ARM_V7S_LVL_IDX(iova, lvl);
+	ptep += ARM_V7S_LVL_IDX(iova, lvl, cfg);
 
 	/* If we can install a leaf entry at this level, then do so */
 	if (num_entries)
@@ -519,7 +523,6 @@ static int arm_v7s_map(struct io_pgtable_ops *ops, unsigned long iova,
 			phys_addr_t paddr, size_t size, int prot, gfp_t gfp)
 {
 	struct arm_v7s_io_pgtable *data = io_pgtable_ops_to_data(ops);
-	struct io_pgtable *iop = &data->iop;
 	int ret;
 
 	if (WARN_ON(iova >= (1ULL << data->iop.cfg.ias) ||
@@ -535,12 +538,7 @@ static int arm_v7s_map(struct io_pgtable_ops *ops, unsigned long iova,
 	 * Synchronise all PTE updates for the new mapping before there's
 	 * a chance for anything to kick off a table walk for the new iova.
 	 */
-	if (iop->cfg.quirks & IO_PGTABLE_QUIRK_TLBI_ON_MAP) {
-		io_pgtable_tlb_flush_walk(iop, iova, size,
-					  ARM_V7S_BLOCK_SIZE(2));
-	} else {
-		wmb();
-	}
+	wmb();
 
 	return ret;
 }
@@ -550,7 +548,7 @@ static void arm_v7s_free_pgtable(struct io_pgtable *iop)
 	struct arm_v7s_io_pgtable *data = io_pgtable_to_data(iop);
 	int i;
 
-	for (i = 0; i < ARM_V7S_PTES_PER_LVL(1); i++) {
+	for (i = 0; i < ARM_V7S_PTES_PER_LVL(1, &data->iop.cfg); i++) {
 		arm_v7s_iopte pte = data->pgd[i];
 
 		if (ARM_V7S_PTE_IS_TABLE(pte, 1))
@@ -602,9 +600,9 @@ static size_t arm_v7s_split_blk_unmap(struct arm_v7s_io_pgtable *data,
 	if (!tablep)
 		return 0; /* Bytes unmapped */
 
-	num_ptes = ARM_V7S_PTES_PER_LVL(2);
+	num_ptes = ARM_V7S_PTES_PER_LVL(2, cfg);
 	num_entries = size >> ARM_V7S_LVL_SHIFT(2);
-	unmap_idx = ARM_V7S_LVL_IDX(iova, 2);
+	unmap_idx = ARM_V7S_LVL_IDX(iova, 2, cfg);
 
 	pte = arm_v7s_prot_to_pte(arm_v7s_pte_to_prot(blk_pte, 1), 2, cfg);
 	if (num_entries > 1)
@@ -646,7 +644,7 @@ static size_t __arm_v7s_unmap(struct arm_v7s_io_pgtable *data,
 	if (WARN_ON(lvl > 2))
 		return 0;
 
-	idx = ARM_V7S_LVL_IDX(iova, lvl);
+	idx = ARM_V7S_LVL_IDX(iova, lvl, &iop->cfg);
 	ptep += idx;
 	do {
 		pte[i] = READ_ONCE(ptep[i]);
@@ -717,7 +715,7 @@ static size_t arm_v7s_unmap(struct io_pgtable_ops *ops, unsigned long iova,
 {
 	struct arm_v7s_io_pgtable *data = io_pgtable_ops_to_data(ops);
 
-	if (WARN_ON(upper_32_bits(iova)))
+	if (WARN_ON(iova >= (1ULL << data->iop.cfg.ias)))
 		return 0;
 
 	return __arm_v7s_unmap(data, gather, iova, size, 1, data->pgd);
@@ -732,7 +730,7 @@ static phys_addr_t arm_v7s_iova_to_phys(struct io_pgtable_ops *ops,
 	u32 mask;
 
 	do {
-		ptep += ARM_V7S_LVL_IDX(iova, ++lvl);
+		ptep += ARM_V7S_LVL_IDX(iova, ++lvl, &data->iop.cfg);
 		pte = READ_ONCE(*ptep);
 		ptep = iopte_deref(pte, lvl, data);
 	} while (ARM_V7S_PTE_IS_TABLE(pte, lvl));
@@ -751,15 +749,14 @@ static struct io_pgtable *arm_v7s_alloc_pgtable(struct io_pgtable_cfg *cfg,
 {
 	struct arm_v7s_io_pgtable *data;
 
-	if (cfg->ias > ARM_V7S_ADDR_BITS)
+	if (cfg->ias > (arm_v7s_is_mtk_enabled(cfg) ? 34 : ARM_V7S_ADDR_BITS))
 		return NULL;
 
-	if (cfg->oas > (arm_v7s_is_mtk_enabled(cfg) ? 34 : ARM_V7S_ADDR_BITS))
+	if (cfg->oas > (arm_v7s_is_mtk_enabled(cfg) ? 35 : ARM_V7S_ADDR_BITS))
 		return NULL;
 
 	if (cfg->quirks & ~(IO_PGTABLE_QUIRK_ARM_NS |
 			    IO_PGTABLE_QUIRK_NO_PERMS |
-			    IO_PGTABLE_QUIRK_TLBI_ON_MAP |
 			    IO_PGTABLE_QUIRK_ARM_MTK_EXT |
 			    IO_PGTABLE_QUIRK_NON_STRICT))
 		return NULL;
@@ -775,8 +772,8 @@ static struct io_pgtable *arm_v7s_alloc_pgtable(struct io_pgtable_cfg *cfg,
 
 	spin_lock_init(&data->split_lock);
 	data->l2_tables = kmem_cache_create("io-pgtable_armv7s_l2",
-					    ARM_V7S_TABLE_SIZE(2),
-					    ARM_V7S_TABLE_SIZE(2),
+					    ARM_V7S_TABLE_SIZE(2, cfg),
+					    ARM_V7S_TABLE_SIZE(2, cfg),
 					    ARM_V7S_TABLE_SLAB_FLAGS, NULL);
 	if (!data->l2_tables)
 		goto out_free_data;
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index ffeebda8d6de..3d099a31ddca 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -2426,9 +2426,6 @@ static int __iommu_map(struct iommu_domain *domain, unsigned long iova,
 		size -= pgsize;
 	}
 
-	if (ops->iotlb_sync_map)
-		ops->iotlb_sync_map(domain);
-
 	/* unroll mapping in case something went wrong */
 	if (ret)
 		iommu_unmap(domain, orig_iova, orig_size - size);
@@ -2438,18 +2435,31 @@ static int __iommu_map(struct iommu_domain *domain, unsigned long iova,
 	return ret;
 }
 
+static int _iommu_map(struct iommu_domain *domain, unsigned long iova,
+		      phys_addr_t paddr, size_t size, int prot, gfp_t gfp)
+{
+	const struct iommu_ops *ops = domain->ops;
+	int ret;
+
+	ret = __iommu_map(domain, iova, paddr, size, prot, GFP_KERNEL);
+	if (ret == 0 && ops->iotlb_sync_map)
+		ops->iotlb_sync_map(domain, iova, size);
+
+	return ret;
+}
+
 int iommu_map(struct iommu_domain *domain, unsigned long iova,
 	      phys_addr_t paddr, size_t size, int prot)
 {
 	might_sleep();
-	return __iommu_map(domain, iova, paddr, size, prot, GFP_KERNEL);
+	return _iommu_map(domain, iova, paddr, size, prot, GFP_KERNEL);
 }
 EXPORT_SYMBOL_GPL(iommu_map);
 
 int iommu_map_atomic(struct iommu_domain *domain, unsigned long iova,
 	      phys_addr_t paddr, size_t size, int prot)
 {
-	return __iommu_map(domain, iova, paddr, size, prot, GFP_ATOMIC);
+	return _iommu_map(domain, iova, paddr, size, prot, GFP_ATOMIC);
 }
 EXPORT_SYMBOL_GPL(iommu_map_atomic);
 
@@ -2533,6 +2543,7 @@ static size_t __iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
 			     struct scatterlist *sg, unsigned int nents, int prot,
 			     gfp_t gfp)
 {
+	const struct iommu_ops *ops = domain->ops;
 	size_t len = 0, mapped = 0;
 	phys_addr_t start;
 	unsigned int i = 0;
@@ -2563,6 +2574,8 @@ static size_t __iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
 			sg = sg_next(sg);
 	}
 
+	if (ops->iotlb_sync_map)
+		ops->iotlb_sync_map(domain, iova, mapped);
 	return mapped;
 
 out_err:
diff --git a/drivers/iommu/msm_iommu.c b/drivers/iommu/msm_iommu.c
index 040e85f70861..f0ba6a09b434 100644
--- a/drivers/iommu/msm_iommu.c
+++ b/drivers/iommu/msm_iommu.c
@@ -343,7 +343,6 @@ static int msm_iommu_domain_config(struct msm_priv *priv)
 	spin_lock_init(&priv->pgtlock);
 
 	priv->cfg = (struct io_pgtable_cfg) {
-		.quirks = IO_PGTABLE_QUIRK_TLBI_ON_MAP,
 		.pgsize_bitmap = msm_iommu_ops.pgsize_bitmap,
 		.ias = 32,
 		.oas = 32,
@@ -490,6 +489,14 @@ static int msm_iommu_map(struct iommu_domain *domain, unsigned long iova,
 	return ret;
 }
 
+static void msm_iommu_sync_map(struct iommu_domain *domain, unsigned long iova,
+			       size_t size)
+{
+	struct msm_priv *priv = to_msm_priv(domain);
+
+	__flush_iotlb_range(iova, size, SZ_4K, false, priv);
+}
+
 static size_t msm_iommu_unmap(struct iommu_domain *domain, unsigned long iova,
 			      size_t len, struct iommu_iotlb_gather *gather)
 {
@@ -680,6 +687,7 @@ static struct iommu_ops msm_iommu_ops = {
 	 * kick starting the other master.
 	 */
 	.iotlb_sync = NULL,
+	.iotlb_sync_map = msm_iommu_sync_map,
 	.iova_to_phys = msm_iommu_iova_to_phys,
 	.probe_device = msm_iommu_probe_device,
 	.release_device = msm_iommu_release_device,
diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 8e56cec532e7..0ad14a7604b1 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -3,10 +3,12 @@
  * Copyright (c) 2015-2016 MediaTek Inc.
  * Author: Yong Wu <yong.wu@mediatek.com>
  */
+#include <linux/bitfield.h>
 #include <linux/bug.h>
 #include <linux/clk.h>
 #include <linux/component.h>
 #include <linux/device.h>
+#include <linux/dma-direct.h>
 #include <linux/dma-iommu.h>
 #include <linux/err.h>
 #include <linux/interrupt.h>
@@ -20,6 +22,7 @@
 #include <linux/of_irq.h>
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
 #include <linux/regmap.h>
 #include <linux/slab.h>
 #include <linux/spinlock.h>
@@ -88,6 +91,9 @@
 #define F_REG_MMU1_FAULT_MASK			GENMASK(13, 7)
 
 #define REG_MMU0_FAULT_VA			0x13c
+#define F_MMU_INVAL_VA_31_12_MASK		GENMASK(31, 12)
+#define F_MMU_INVAL_VA_34_32_MASK		GENMASK(11, 9)
+#define F_MMU_INVAL_PA_34_32_MASK		GENMASK(8, 6)
 #define F_MMU_FAULT_VA_WRITE_BIT		BIT(1)
 #define F_MMU_FAULT_VA_LAYER_BIT		BIT(0)
 
@@ -103,13 +109,6 @@
 
 #define MTK_PROTECT_PA_ALIGN			256
 
-/*
- * Get the local arbiter ID and the portid within the larb arbiter
- * from mtk_m4u_id which is defined by MTK_M4U_ID.
- */
-#define MTK_M4U_TO_LARB(id)		(((id) >> 5) & 0xf)
-#define MTK_M4U_TO_PORT(id)		((id) & 0x1f)
-
 #define HAS_4GB_MODE			BIT(0)
 /* HW will use the EMI clock if there isn't the "bclk". */
 #define HAS_BCLK			BIT(1)
@@ -119,6 +118,7 @@
 #define HAS_SUB_COMM			BIT(5)
 #define WR_THROT_EN			BIT(6)
 #define HAS_LEGACY_IVRP_PADDR		BIT(7)
+#define IOVA_34_EN			BIT(8)
 
 #define MTK_IOMMU_HAS_FLAG(pdata, _x) \
 		((((pdata)->flags) & (_x)) == (_x))
@@ -127,11 +127,19 @@ struct mtk_iommu_domain {
 	struct io_pgtable_cfg		cfg;
 	struct io_pgtable_ops		*iop;
 
+	struct mtk_iommu_data		*data;
 	struct iommu_domain		domain;
 };
 
 static const struct iommu_ops mtk_iommu_ops;
 
+static int mtk_iommu_hw_init(const struct mtk_iommu_data *data);
+
+#define MTK_IOMMU_TLB_ADDR(iova) ({					\
+	dma_addr_t _addr = iova;					\
+	((lower_32_bits(_addr) & GENMASK(31, 12)) | upper_32_bits(_addr));\
+})
+
 /*
  * In M4U 4GB mode, the physical address is remapped as below:
  *
@@ -160,6 +168,25 @@ static LIST_HEAD(m4ulist);	/* List all the M4U HWs */
 
 #define for_each_m4u(data)	list_for_each_entry(data, &m4ulist, list)
 
+struct mtk_iommu_iova_region {
+	dma_addr_t		iova_base;
+	unsigned long long	size;
+};
+
+static const struct mtk_iommu_iova_region single_domain[] = {
+	{.iova_base = 0,		.size = SZ_4G},
+};
+
+static const struct mtk_iommu_iova_region mt8192_multi_dom[] = {
+	{ .iova_base = 0x0,		.size = SZ_4G},		/* disp: 0 ~ 4G */
+	#if IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT)
+	{ .iova_base = SZ_4G,		.size = SZ_4G},		/* vdec: 4G ~ 8G */
+	{ .iova_base = SZ_4G * 2,	.size = SZ_4G},		/* CAM/MDP: 8G ~ 12G */
+	{ .iova_base = 0x240000000ULL,	.size = 0x4000000},	/* CCU0 */
+	{ .iova_base = 0x244000000ULL,	.size = 0x4000000},	/* CCU1 */
+	#endif
+};
+
 /*
  * There may be 1 or 2 M4U HWs, But we always expect they are in the same domain
  * for the performance.
@@ -182,33 +209,43 @@ static struct mtk_iommu_domain *to_mtk_domain(struct iommu_domain *dom)
 	return container_of(dom, struct mtk_iommu_domain, domain);
 }
 
-static void mtk_iommu_tlb_flush_all(void *cookie)
+static void mtk_iommu_tlb_flush_all(struct mtk_iommu_data *data)
 {
-	struct mtk_iommu_data *data = cookie;
-
 	for_each_m4u(data) {
+		if (pm_runtime_get_if_in_use(data->dev) <= 0)
+			continue;
+
 		writel_relaxed(F_INVLD_EN1 | F_INVLD_EN0,
 			       data->base + data->plat_data->inv_sel_reg);
 		writel_relaxed(F_ALL_INVLD, data->base + REG_MMU_INVALIDATE);
 		wmb(); /* Make sure the tlb flush all done */
+
+		pm_runtime_put(data->dev);
 	}
 }
 
 static void mtk_iommu_tlb_flush_range_sync(unsigned long iova, size_t size,
-					   size_t granule, void *cookie)
+					   size_t granule,
+					   struct mtk_iommu_data *data)
 {
-	struct mtk_iommu_data *data = cookie;
+	bool has_pm = !!data->dev->pm_domain;
 	unsigned long flags;
 	int ret;
 	u32 tmp;
 
 	for_each_m4u(data) {
+		if (has_pm) {
+			if (pm_runtime_get_if_in_use(data->dev) <= 0)
+				continue;
+		}
+
 		spin_lock_irqsave(&data->tlb_lock, flags);
 		writel_relaxed(F_INVLD_EN1 | F_INVLD_EN0,
 			       data->base + data->plat_data->inv_sel_reg);
 
-		writel_relaxed(iova, data->base + REG_MMU_INVLD_START_A);
-		writel_relaxed(iova + size - 1,
+		writel_relaxed(MTK_IOMMU_TLB_ADDR(iova),
+			       data->base + REG_MMU_INVLD_START_A);
+		writel_relaxed(MTK_IOMMU_TLB_ADDR(iova + size - 1),
 			       data->base + REG_MMU_INVLD_END_A);
 		writel_relaxed(F_MMU_INV_RANGE,
 			       data->base + REG_MMU_INVALIDATE);
@@ -219,36 +256,24 @@ static void mtk_iommu_tlb_flush_range_sync(unsigned long iova, size_t size,
 		if (ret) {
 			dev_warn(data->dev,
 				 "Partial TLB flush timed out, falling back to full flush\n");
-			mtk_iommu_tlb_flush_all(cookie);
+			mtk_iommu_tlb_flush_all(data);
 		}
 		/* Clear the CPE status */
 		writel_relaxed(0, data->base + REG_MMU_CPE_DONE);
 		spin_unlock_irqrestore(&data->tlb_lock, flags);
-	}
-}
-
-static void mtk_iommu_tlb_flush_page_nosync(struct iommu_iotlb_gather *gather,
-					    unsigned long iova, size_t granule,
-					    void *cookie)
-{
-	struct mtk_iommu_data *data = cookie;
-	struct iommu_domain *domain = &data->m4u_dom->domain;
 
-	iommu_iotlb_gather_add_page(domain, gather, iova, granule);
+		if (has_pm)
+			pm_runtime_put(data->dev);
+	}
 }
 
-static const struct iommu_flush_ops mtk_iommu_flush_ops = {
-	.tlb_flush_all = mtk_iommu_tlb_flush_all,
-	.tlb_flush_walk = mtk_iommu_tlb_flush_range_sync,
-	.tlb_add_page = mtk_iommu_tlb_flush_page_nosync,
-};
-
 static irqreturn_t mtk_iommu_isr(int irq, void *dev_id)
 {
 	struct mtk_iommu_data *data = dev_id;
 	struct mtk_iommu_domain *dom = data->m4u_dom;
-	u32 int_state, regval, fault_iova, fault_pa;
 	unsigned int fault_larb, fault_port, sub_comm = 0;
+	u32 int_state, regval, va34_32, pa34_32;
+	u64 fault_iova, fault_pa;
 	bool layer, write;
 
 	/* Read error info from registers */
@@ -264,6 +289,14 @@ static irqreturn_t mtk_iommu_isr(int irq, void *dev_id)
 	}
 	layer = fault_iova & F_MMU_FAULT_VA_LAYER_BIT;
 	write = fault_iova & F_MMU_FAULT_VA_WRITE_BIT;
+	if (MTK_IOMMU_HAS_FLAG(data->plat_data, IOVA_34_EN)) {
+		va34_32 = FIELD_GET(F_MMU_INVAL_VA_34_32_MASK, fault_iova);
+		pa34_32 = FIELD_GET(F_MMU_INVAL_PA_34_32_MASK, fault_iova);
+		fault_iova = fault_iova & F_MMU_INVAL_VA_31_12_MASK;
+		fault_iova |= (u64)va34_32 << 32;
+		fault_pa |= (u64)pa34_32 << 32;
+	}
+
 	fault_port = F_MMU_INT_ID_PORT_ID(regval);
 	if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_SUB_COMM)) {
 		fault_larb = F_MMU_INT_ID_COMM_ID(regval);
@@ -277,7 +310,7 @@ static irqreturn_t mtk_iommu_isr(int irq, void *dev_id)
 			       write ? IOMMU_FAULT_WRITE : IOMMU_FAULT_READ)) {
 		dev_err_ratelimited(
 			data->dev,
-			"fault type=0x%x iova=0x%x pa=0x%x larb=%d port=%d layer=%d %s\n",
+			"fault type=0x%x iova=0x%llx pa=0x%llx larb=%d port=%d layer=%d %s\n",
 			int_state, fault_iova, fault_pa, fault_larb, fault_port,
 			layer, write ? "write" : "read");
 	}
@@ -292,21 +325,57 @@ static irqreturn_t mtk_iommu_isr(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-static void mtk_iommu_config(struct mtk_iommu_data *data,
-			     struct device *dev, bool enable)
+static int mtk_iommu_get_domain_id(struct device *dev,
+				   const struct mtk_iommu_plat_data *plat_data)
+{
+	const struct mtk_iommu_iova_region *rgn = plat_data->iova_region;
+	const struct bus_dma_region *dma_rgn = dev->dma_range_map;
+	int i, candidate = -1;
+	dma_addr_t dma_end;
+
+	if (!dma_rgn || plat_data->iova_region_nr == 1)
+		return 0;
+
+	dma_end = dma_rgn->dma_start + dma_rgn->size - 1;
+	for (i = 0; i < plat_data->iova_region_nr; i++, rgn++) {
+		/* Best fit. */
+		if (dma_rgn->dma_start == rgn->iova_base &&
+		    dma_end == rgn->iova_base + rgn->size - 1)
+			return i;
+		/* ok if it is inside this region. */
+		if (dma_rgn->dma_start >= rgn->iova_base &&
+		    dma_end < rgn->iova_base + rgn->size)
+			candidate = i;
+	}
+
+	if (candidate >= 0)
+		return candidate;
+	dev_err(dev, "Can NOT find the iommu domain id(%pad 0x%llx).\n",
+		&dma_rgn->dma_start, dma_rgn->size);
+	return -EINVAL;
+}
+
+static void mtk_iommu_config(struct mtk_iommu_data *data, struct device *dev,
+			     bool enable, unsigned int domid)
 {
 	struct mtk_smi_larb_iommu    *larb_mmu;
 	unsigned int                 larbid, portid;
 	struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
+	const struct mtk_iommu_iova_region *region;
 	int i;
 
 	for (i = 0; i < fwspec->num_ids; ++i) {
 		larbid = MTK_M4U_TO_LARB(fwspec->ids[i]);
 		portid = MTK_M4U_TO_PORT(fwspec->ids[i]);
+
 		larb_mmu = &data->larb_imu[larbid];
 
-		dev_dbg(dev, "%s iommu port: %d\n",
-			enable ? "enable" : "disable", portid);
+		region = data->plat_data->iova_region + domid;
+		larb_mmu->bank[portid] = upper_32_bits(region->iova_base);
+
+		dev_dbg(dev, "%s iommu for larb(%s) port %d dom %d bank %d.\n",
+			enable ? "enable" : "disable", dev_name(larb_mmu->dev),
+			portid, domid, larb_mmu->bank[portid]);
 
 		if (enable)
 			larb_mmu->mmu |= MTK_SMI_MMU_EN(portid);
@@ -315,22 +384,34 @@ static void mtk_iommu_config(struct mtk_iommu_data *data,
 	}
 }
 
-static int mtk_iommu_domain_finalise(struct mtk_iommu_domain *dom)
+static int mtk_iommu_domain_finalise(struct mtk_iommu_domain *dom,
+				     struct mtk_iommu_data *data,
+				     unsigned int domid)
 {
-	struct mtk_iommu_data *data = mtk_iommu_get_m4u_data();
+	const struct mtk_iommu_iova_region *region;
+
+	/* Use the exist domain as there is only one pgtable here. */
+	if (data->m4u_dom) {
+		dom->iop = data->m4u_dom->iop;
+		dom->cfg = data->m4u_dom->cfg;
+		dom->domain.pgsize_bitmap = data->m4u_dom->cfg.pgsize_bitmap;
+		goto update_iova_region;
+	}
 
 	dom->cfg = (struct io_pgtable_cfg) {
 		.quirks = IO_PGTABLE_QUIRK_ARM_NS |
 			IO_PGTABLE_QUIRK_NO_PERMS |
-			IO_PGTABLE_QUIRK_TLBI_ON_MAP |
 			IO_PGTABLE_QUIRK_ARM_MTK_EXT,
 		.pgsize_bitmap = mtk_iommu_ops.pgsize_bitmap,
-		.ias = 32,
-		.oas = 34,
-		.tlb = &mtk_iommu_flush_ops,
+		.ias = MTK_IOMMU_HAS_FLAG(data->plat_data, IOVA_34_EN) ? 34 : 32,
 		.iommu_dev = data->dev,
 	};
 
+	if (MTK_IOMMU_HAS_FLAG(data->plat_data, HAS_4GB_MODE))
+		dom->cfg.oas = data->enable_4GB ? 33 : 32;
+	else
+		dom->cfg.oas = 35;
+
 	dom->iop = alloc_io_pgtable_ops(ARM_V7S, &dom->cfg, data);
 	if (!dom->iop) {
 		dev_err(data->dev, "Failed to alloc io pgtable\n");
@@ -339,6 +420,13 @@ static int mtk_iommu_domain_finalise(struct mtk_iommu_domain *dom)
 
 	/* Update our support page sizes bitmap */
 	dom->domain.pgsize_bitmap = dom->cfg.pgsize_bitmap;
+
+update_iova_region:
+	/* Update the iova region for this domain */
+	region = data->plat_data->iova_region + domid;
+	dom->domain.geometry.aperture_start = region->iova_base;
+	dom->domain.geometry.aperture_end = region->iova_base + region->size - 1;
+	dom->domain.geometry.force_aperture = true;
 	return 0;
 }
 
@@ -353,30 +441,16 @@ static struct iommu_domain *mtk_iommu_domain_alloc(unsigned type)
 	if (!dom)
 		return NULL;
 
-	if (iommu_get_dma_cookie(&dom->domain))
-		goto  free_dom;
-
-	if (mtk_iommu_domain_finalise(dom))
-		goto  put_dma_cookie;
-
-	dom->domain.geometry.aperture_start = 0;
-	dom->domain.geometry.aperture_end = DMA_BIT_MASK(32);
-	dom->domain.geometry.force_aperture = true;
+	if (iommu_get_dma_cookie(&dom->domain)) {
+		kfree(dom);
+		return NULL;
+	}
 
 	return &dom->domain;
-
-put_dma_cookie:
-	iommu_put_dma_cookie(&dom->domain);
-free_dom:
-	kfree(dom);
-	return NULL;
 }
 
 static void mtk_iommu_domain_free(struct iommu_domain *domain)
 {
-	struct mtk_iommu_domain *dom = to_mtk_domain(domain);
-
-	free_io_pgtable_ops(dom->iop);
 	iommu_put_dma_cookie(domain);
 	kfree(to_mtk_domain(domain));
 }
@@ -386,18 +460,37 @@ static int mtk_iommu_attach_device(struct iommu_domain *domain,
 {
 	struct mtk_iommu_data *data = dev_iommu_priv_get(dev);
 	struct mtk_iommu_domain *dom = to_mtk_domain(domain);
+	struct device *m4udev = data->dev;
+	int ret, domid;
 
-	if (!data)
-		return -ENODEV;
+	domid = mtk_iommu_get_domain_id(dev, data->plat_data);
+	if (domid < 0)
+		return domid;
+
+	if (!dom->data) {
+		if (mtk_iommu_domain_finalise(dom, data, domid))
+			return -ENODEV;
+		dom->data = data;
+	}
+
+	if (!data->m4u_dom) { /* Initialize the M4U HW */
+		ret = pm_runtime_resume_and_get(m4udev);
+		if (ret < 0)
+			return ret;
 
-	/* Update the pgtable base address register of the M4U HW */
-	if (!data->m4u_dom) {
+		ret = mtk_iommu_hw_init(data);
+		if (ret) {
+			pm_runtime_put(m4udev);
+			return ret;
+		}
 		data->m4u_dom = dom;
 		writel(dom->cfg.arm_v7s_cfg.ttbr & MMU_PT_ADDR_MASK,
 		       data->base + REG_MMU_PT_BASE_ADDR);
+
+		pm_runtime_put(m4udev);
 	}
 
-	mtk_iommu_config(data, dev, true);
+	mtk_iommu_config(data, dev, true, domid);
 	return 0;
 }
 
@@ -406,20 +499,16 @@ static void mtk_iommu_detach_device(struct iommu_domain *domain,
 {
 	struct mtk_iommu_data *data = dev_iommu_priv_get(dev);
 
-	if (!data)
-		return;
-
-	mtk_iommu_config(data, dev, false);
+	mtk_iommu_config(data, dev, false, 0);
 }
 
 static int mtk_iommu_map(struct iommu_domain *domain, unsigned long iova,
 			 phys_addr_t paddr, size_t size, int prot, gfp_t gfp)
 {
 	struct mtk_iommu_domain *dom = to_mtk_domain(domain);
-	struct mtk_iommu_data *data = mtk_iommu_get_m4u_data();
 
 	/* The "4GB mode" M4U physically can not use the lower remap of Dram. */
-	if (data->enable_4GB)
+	if (dom->data->enable_4GB)
 		paddr |= BIT_ULL(32);
 
 	/* Synchronize with the tlb_lock */
@@ -431,37 +520,48 @@ static size_t mtk_iommu_unmap(struct iommu_domain *domain,
 			      struct iommu_iotlb_gather *gather)
 {
 	struct mtk_iommu_domain *dom = to_mtk_domain(domain);
+	unsigned long end = iova + size - 1;
 
+	if (gather->start > iova)
+		gather->start = iova;
+	if (gather->end < end)
+		gather->end = end;
 	return dom->iop->unmap(dom->iop, iova, size, gather);
 }
 
 static void mtk_iommu_flush_iotlb_all(struct iommu_domain *domain)
 {
-	mtk_iommu_tlb_flush_all(mtk_iommu_get_m4u_data());
+	struct mtk_iommu_domain *dom = to_mtk_domain(domain);
+
+	mtk_iommu_tlb_flush_all(dom->data);
 }
 
 static void mtk_iommu_iotlb_sync(struct iommu_domain *domain,
 				 struct iommu_iotlb_gather *gather)
 {
-	struct mtk_iommu_data *data = mtk_iommu_get_m4u_data();
-	size_t length = gather->end - gather->start;
-
-	if (gather->start == ULONG_MAX)
-		return;
+	struct mtk_iommu_domain *dom = to_mtk_domain(domain);
+	size_t length = gather->end - gather->start + 1;
 
 	mtk_iommu_tlb_flush_range_sync(gather->start, length, gather->pgsize,
-				       data);
+				       dom->data);
+}
+
+static void mtk_iommu_sync_map(struct iommu_domain *domain, unsigned long iova,
+			       size_t size)
+{
+	struct mtk_iommu_domain *dom = to_mtk_domain(domain);
+
+	mtk_iommu_tlb_flush_range_sync(iova, size, size, dom->data);
 }
 
 static phys_addr_t mtk_iommu_iova_to_phys(struct iommu_domain *domain,
 					  dma_addr_t iova)
 {
 	struct mtk_iommu_domain *dom = to_mtk_domain(domain);
-	struct mtk_iommu_data *data = mtk_iommu_get_m4u_data();
 	phys_addr_t pa;
 
 	pa = dom->iop->iova_to_phys(dom->iop, iova);
-	if (data->enable_4GB && pa >= MTK_IOMMU_4GB_MODE_REMAP_BASE)
+	if (dom->data->enable_4GB && pa >= MTK_IOMMU_4GB_MODE_REMAP_BASE)
 		pa &= ~BIT_ULL(32);
 
 	return pa;
@@ -493,19 +593,25 @@ static void mtk_iommu_release_device(struct device *dev)
 static struct iommu_group *mtk_iommu_device_group(struct device *dev)
 {
 	struct mtk_iommu_data *data = mtk_iommu_get_m4u_data();
+	struct iommu_group *group;
+	int domid;
 
 	if (!data)
 		return ERR_PTR(-ENODEV);
 
-	/* All the client devices are in the same m4u iommu-group */
-	if (!data->m4u_group) {
-		data->m4u_group = iommu_group_alloc();
-		if (IS_ERR(data->m4u_group))
-			dev_err(dev, "Failed to allocate M4U IOMMU group\n");
+	domid = mtk_iommu_get_domain_id(dev, data->plat_data);
+	if (domid < 0)
+		return ERR_PTR(domid);
+
+	group = data->m4u_group[domid];
+	if (!group) {
+		group = iommu_group_alloc();
+		if (!IS_ERR(group))
+			data->m4u_group[domid] = group;
 	} else {
-		iommu_group_ref_get(data->m4u_group);
+		iommu_group_ref_get(group);
 	}
-	return data->m4u_group;
+	return group;
 }
 
 static int mtk_iommu_of_xlate(struct device *dev, struct of_phandle_args *args)
@@ -530,6 +636,35 @@ static int mtk_iommu_of_xlate(struct device *dev, struct of_phandle_args *args)
 	return iommu_fwspec_add_ids(dev, args->args, 1);
 }
 
+static void mtk_iommu_get_resv_regions(struct device *dev,
+				       struct list_head *head)
+{
+	struct mtk_iommu_data *data = dev_iommu_priv_get(dev);
+	unsigned int domid = mtk_iommu_get_domain_id(dev, data->plat_data), i;
+	const struct mtk_iommu_iova_region *resv, *curdom;
+	struct iommu_resv_region *region;
+	int prot = IOMMU_WRITE | IOMMU_READ;
+
+	if (domid < 0)
+		return;
+	curdom = data->plat_data->iova_region + domid;
+	for (i = 0; i < data->plat_data->iova_region_nr; i++) {
+		resv = data->plat_data->iova_region + i;
+
+		/* Only reserve when the region is inside the current domain */
+		if (resv->iova_base <= curdom->iova_base ||
+		    resv->iova_base + resv->size >= curdom->iova_base + curdom->size)
+			continue;
+
+		region = iommu_alloc_resv_region(resv->iova_base, resv->size,
+						 prot, IOMMU_RESV_RESERVED);
+		if (!region)
+			return;
+
+		list_add_tail(&region->list, head);
+	}
+}
+
 static const struct iommu_ops mtk_iommu_ops = {
 	.domain_alloc	= mtk_iommu_domain_alloc,
 	.domain_free	= mtk_iommu_domain_free,
@@ -539,11 +674,14 @@ static const struct iommu_ops mtk_iommu_ops = {
 	.unmap		= mtk_iommu_unmap,
 	.flush_iotlb_all = mtk_iommu_flush_iotlb_all,
 	.iotlb_sync	= mtk_iommu_iotlb_sync,
+	.iotlb_sync_map	= mtk_iommu_sync_map,
 	.iova_to_phys	= mtk_iommu_iova_to_phys,
 	.probe_device	= mtk_iommu_probe_device,
 	.release_device	= mtk_iommu_release_device,
 	.device_group	= mtk_iommu_device_group,
 	.of_xlate	= mtk_iommu_of_xlate,
+	.get_resv_regions = mtk_iommu_get_resv_regions,
+	.put_resv_regions = generic_iommu_put_resv_regions,
 	.pgsize_bitmap	= SZ_4K | SZ_64K | SZ_1M | SZ_16M,
 };
 
@@ -639,6 +777,9 @@ static int mtk_iommu_probe(struct platform_device *pdev)
 {
 	struct mtk_iommu_data   *data;
 	struct device           *dev = &pdev->dev;
+	struct device_node	*larbnode, *smicomm_node;
+	struct platform_device	*plarbdev;
+	struct device_link	*link;
 	struct resource         *res;
 	resource_size_t		ioaddr;
 	struct component_match  *match = NULL;
@@ -705,8 +846,6 @@ static int mtk_iommu_probe(struct platform_device *pdev)
 		return larb_nr;
 
 	for (i = 0; i < larb_nr; i++) {
-		struct device_node *larbnode;
-		struct platform_device *plarbdev;
 		u32 id;
 
 		larbnode = of_parse_phandle(dev->of_node, "mediatek,larbs", i);
@@ -733,31 +872,64 @@ static int mtk_iommu_probe(struct platform_device *pdev)
 					    compare_of, larbnode);
 	}
 
-	platform_set_drvdata(pdev, data);
+	/* Get smi-common dev from the last larb. */
+	smicomm_node = of_parse_phandle(larbnode, "mediatek,smi", 0);
+	if (!smicomm_node)
+		return -EINVAL;
 
-	ret = mtk_iommu_hw_init(data);
-	if (ret)
-		return ret;
+	plarbdev = of_find_device_by_node(smicomm_node);
+	of_node_put(smicomm_node);
+	data->smicomm_dev = &plarbdev->dev;
+
+	pm_runtime_enable(dev);
+
+	link = device_link_add(data->smicomm_dev, dev,
+			DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME);
+	if (!link) {
+		dev_err(dev, "Unable link %s.\n", dev_name(data->smicomm_dev));
+		goto out_runtime_disable;
+	}
+
+	platform_set_drvdata(pdev, data);
 
 	ret = iommu_device_sysfs_add(&data->iommu, dev, NULL,
 				     "mtk-iommu.%pa", &ioaddr);
 	if (ret)
-		return ret;
+		goto out_link_remove;
 
 	iommu_device_set_ops(&data->iommu, &mtk_iommu_ops);
 	iommu_device_set_fwnode(&data->iommu, &pdev->dev.of_node->fwnode);
 
 	ret = iommu_device_register(&data->iommu);
 	if (ret)
-		return ret;
+		goto out_sysfs_remove;
 
 	spin_lock_init(&data->tlb_lock);
 	list_add_tail(&data->list, &m4ulist);
 
-	if (!iommu_present(&platform_bus_type))
-		bus_set_iommu(&platform_bus_type, &mtk_iommu_ops);
+	if (!iommu_present(&platform_bus_type)) {
+		ret = bus_set_iommu(&platform_bus_type, &mtk_iommu_ops);
+		if (ret)
+			goto out_list_del;
+	}
 
-	return component_master_add_with_match(dev, &mtk_iommu_com_ops, match);
+	ret = component_master_add_with_match(dev, &mtk_iommu_com_ops, match);
+	if (ret)
+		goto out_bus_set_null;
+	return ret;
+
+out_bus_set_null:
+	bus_set_iommu(&platform_bus_type, NULL);
+out_list_del:
+	list_del(&data->list);
+	iommu_device_unregister(&data->iommu);
+out_sysfs_remove:
+	iommu_device_sysfs_remove(&data->iommu);
+out_link_remove:
+	device_link_remove(data->smicomm_dev, dev);
+out_runtime_disable:
+	pm_runtime_disable(dev);
+	return ret;
 }
 
 static int mtk_iommu_remove(struct platform_device *pdev)
@@ -771,12 +943,14 @@ static int mtk_iommu_remove(struct platform_device *pdev)
 		bus_set_iommu(&platform_bus_type, NULL);
 
 	clk_disable_unprepare(data->bclk);
+	device_link_remove(data->smicomm_dev, &pdev->dev);
+	pm_runtime_disable(&pdev->dev);
 	devm_free_irq(&pdev->dev, data->irq, data);
 	component_master_del(&pdev->dev, &mtk_iommu_com_ops);
 	return 0;
 }
 
-static int __maybe_unused mtk_iommu_suspend(struct device *dev)
+static int __maybe_unused mtk_iommu_runtime_suspend(struct device *dev)
 {
 	struct mtk_iommu_data *data = dev_get_drvdata(dev);
 	struct mtk_iommu_suspend_reg *reg = &data->reg;
@@ -794,7 +968,7 @@ static int __maybe_unused mtk_iommu_suspend(struct device *dev)
 	return 0;
 }
 
-static int __maybe_unused mtk_iommu_resume(struct device *dev)
+static int __maybe_unused mtk_iommu_runtime_resume(struct device *dev)
 {
 	struct mtk_iommu_data *data = dev_get_drvdata(dev);
 	struct mtk_iommu_suspend_reg *reg = &data->reg;
@@ -802,6 +976,9 @@ static int __maybe_unused mtk_iommu_resume(struct device *dev)
 	void __iomem *base = data->base;
 	int ret;
 
+	/* Avoid first resume to affect the default value of registers below. */
+	if (!m4u_dom)
+		return 0;
 	ret = clk_prepare_enable(data->bclk);
 	if (ret) {
 		dev_err(data->dev, "Failed to enable clk(%d) in resume\n", ret);
@@ -815,20 +992,22 @@ static int __maybe_unused mtk_iommu_resume(struct device *dev)
 	writel_relaxed(reg->int_main_control, base + REG_MMU_INT_MAIN_CONTROL);
 	writel_relaxed(reg->ivrp_paddr, base + REG_MMU_IVRP_PADDR);
 	writel_relaxed(reg->vld_pa_rng, base + REG_MMU_VLD_PA_RNG);
-	if (m4u_dom)
-		writel(m4u_dom->cfg.arm_v7s_cfg.ttbr & MMU_PT_ADDR_MASK,
-		       base + REG_MMU_PT_BASE_ADDR);
+	writel(m4u_dom->cfg.arm_v7s_cfg.ttbr & MMU_PT_ADDR_MASK, base + REG_MMU_PT_BASE_ADDR);
 	return 0;
 }
 
 static const struct dev_pm_ops mtk_iommu_pm_ops = {
-	SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(mtk_iommu_suspend, mtk_iommu_resume)
+	SET_RUNTIME_PM_OPS(mtk_iommu_runtime_suspend, mtk_iommu_runtime_resume, NULL)
+	SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+				     pm_runtime_force_resume)
 };
 
 static const struct mtk_iommu_plat_data mt2712_data = {
 	.m4u_plat     = M4U_MT2712,
 	.flags        = HAS_4GB_MODE | HAS_BCLK | HAS_VLD_PA_RNG,
 	.inv_sel_reg  = REG_MMU_INV_SEL_GEN1,
+	.iova_region  = single_domain,
+	.iova_region_nr = ARRAY_SIZE(single_domain),
 	.larbid_remap = {{0}, {1}, {2}, {3}, {4}, {5}, {6}, {7}},
 };
 
@@ -836,6 +1015,8 @@ static const struct mtk_iommu_plat_data mt6779_data = {
 	.m4u_plat      = M4U_MT6779,
 	.flags         = HAS_SUB_COMM | OUT_ORDER_WR_EN | WR_THROT_EN,
 	.inv_sel_reg   = REG_MMU_INV_SEL_GEN2,
+	.iova_region   = single_domain,
+	.iova_region_nr = ARRAY_SIZE(single_domain),
 	.larbid_remap  = {{0}, {1}, {2}, {3}, {5}, {7, 8}, {10}, {9}},
 };
 
@@ -843,6 +1024,8 @@ static const struct mtk_iommu_plat_data mt8167_data = {
 	.m4u_plat     = M4U_MT8167,
 	.flags        = RESET_AXI | HAS_LEGACY_IVRP_PADDR,
 	.inv_sel_reg  = REG_MMU_INV_SEL_GEN1,
+	.iova_region  = single_domain,
+	.iova_region_nr = ARRAY_SIZE(single_domain),
 	.larbid_remap = {{0}, {1}, {2}}, /* Linear mapping. */
 };
 
@@ -851,6 +1034,8 @@ static const struct mtk_iommu_plat_data mt8173_data = {
 	.flags	      = HAS_4GB_MODE | HAS_BCLK | RESET_AXI |
 			HAS_LEGACY_IVRP_PADDR,
 	.inv_sel_reg  = REG_MMU_INV_SEL_GEN1,
+	.iova_region  = single_domain,
+	.iova_region_nr = ARRAY_SIZE(single_domain),
 	.larbid_remap = {{0}, {1}, {2}, {3}, {4}, {5}}, /* Linear mapping. */
 };
 
@@ -858,15 +1043,29 @@ static const struct mtk_iommu_plat_data mt8183_data = {
 	.m4u_plat     = M4U_MT8183,
 	.flags        = RESET_AXI,
 	.inv_sel_reg  = REG_MMU_INV_SEL_GEN1,
+	.iova_region  = single_domain,
+	.iova_region_nr = ARRAY_SIZE(single_domain),
 	.larbid_remap = {{0}, {4}, {5}, {6}, {7}, {2}, {3}, {1}},
 };
 
+static const struct mtk_iommu_plat_data mt8192_data = {
+	.m4u_plat       = M4U_MT8192,
+	.flags          = HAS_BCLK | HAS_SUB_COMM | OUT_ORDER_WR_EN |
+			  WR_THROT_EN | IOVA_34_EN,
+	.inv_sel_reg    = REG_MMU_INV_SEL_GEN2,
+	.iova_region    = mt8192_multi_dom,
+	.iova_region_nr = ARRAY_SIZE(mt8192_multi_dom),
+	.larbid_remap   = {{0}, {1}, {4, 5}, {7}, {2}, {9, 11, 19, 20},
+			   {0, 14, 16}, {0, 13, 18, 17}},
+};
+
 static const struct of_device_id mtk_iommu_of_ids[] = {
 	{ .compatible = "mediatek,mt2712-m4u", .data = &mt2712_data},
 	{ .compatible = "mediatek,mt6779-m4u", .data = &mt6779_data},
 	{ .compatible = "mediatek,mt8167-m4u", .data = &mt8167_data},
 	{ .compatible = "mediatek,mt8173-m4u", .data = &mt8173_data},
 	{ .compatible = "mediatek,mt8183-m4u", .data = &mt8183_data},
+	{ .compatible = "mediatek,mt8192-m4u", .data = &mt8192_data},
 	{}
 };
 
diff --git a/drivers/iommu/mtk_iommu.h b/drivers/iommu/mtk_iommu.h
index df32b3e3408b..f81fa8862ed0 100644
--- a/drivers/iommu/mtk_iommu.h
+++ b/drivers/iommu/mtk_iommu.h
@@ -17,10 +17,13 @@
 #include <linux/spinlock.h>
 #include <linux/dma-mapping.h>
 #include <soc/mediatek/smi.h>
+#include <dt-bindings/memory/mtk-memory-port.h>
 
 #define MTK_LARB_COM_MAX	8
 #define MTK_LARB_SUBCOM_MAX	4
 
+#define MTK_IOMMU_GROUP_MAX	8
+
 struct mtk_iommu_suspend_reg {
 	union {
 		u32			standard_axi_mode;/* v1 */
@@ -42,12 +45,18 @@ enum mtk_iommu_plat {
 	M4U_MT8167,
 	M4U_MT8173,
 	M4U_MT8183,
+	M4U_MT8192,
 };
 
+struct mtk_iommu_iova_region;
+
 struct mtk_iommu_plat_data {
 	enum mtk_iommu_plat m4u_plat;
 	u32                 flags;
 	u32                 inv_sel_reg;
+
+	unsigned int				iova_region_nr;
+	const struct mtk_iommu_iova_region	*iova_region;
 	unsigned char       larbid_remap[MTK_LARB_COM_MAX][MTK_LARB_SUBCOM_MAX];
 };
 
@@ -61,12 +70,13 @@ struct mtk_iommu_data {
 	phys_addr_t			protect_base; /* protect memory base */
 	struct mtk_iommu_suspend_reg	reg;
 	struct mtk_iommu_domain		*m4u_dom;
-	struct iommu_group		*m4u_group;
+	struct iommu_group		*m4u_group[MTK_IOMMU_GROUP_MAX];
 	bool                            enable_4GB;
 	spinlock_t			tlb_lock; /* lock for tlb range flush */
 
 	struct iommu_device		iommu;
 	const struct mtk_iommu_plat_data *plat_data;
+	struct device			*smicomm_dev;
 
 	struct dma_iommu_mapping	*mapping; /* For mtk_iommu_v1.c */
 
diff --git a/drivers/iommu/tegra-gart.c b/drivers/iommu/tegra-gart.c
index fac720273889..6f130e51f072 100644
--- a/drivers/iommu/tegra-gart.c
+++ b/drivers/iommu/tegra-gart.c
@@ -261,7 +261,8 @@ static int gart_iommu_of_xlate(struct device *dev,
 	return 0;
 }
 
-static void gart_iommu_sync_map(struct iommu_domain *domain)
+static void gart_iommu_sync_map(struct iommu_domain *domain, unsigned long iova,
+				size_t size)
 {
 	FLUSH_GART_REGS(gart_handle);
 }
@@ -269,7 +270,9 @@ static void gart_iommu_sync_map(struct iommu_domain *domain)
 static void gart_iommu_sync(struct iommu_domain *domain,
 			    struct iommu_iotlb_gather *gather)
 {
-	gart_iommu_sync_map(domain);
+	size_t length = gather->end - gather->start + 1;
+
+	gart_iommu_sync_map(domain, gather->start, length);
 }
 
 static const struct iommu_ops gart_iommu_ops = {