diff --git a/drivers/infiniband/hw/mlx5/cmd.c b/drivers/infiniband/hw/mlx5/cmd.c
index be95ac5..f0e9c76 100644
--- a/drivers/infiniband/hw/mlx5/cmd.c
+++ b/drivers/infiniband/hw/mlx5/cmd.c
@@ -82,10 +82,10 @@ int mlx5_cmd_modify_cong_params(struct mlx5_core_dev *dev,
 	return mlx5_cmd_exec(dev, in, in_size, out, sizeof(out));
 }
 
-int mlx5_cmd_alloc_memic(struct mlx5_memic *memic, phys_addr_t *addr,
-			  u64 length, u32 alignment)
+int mlx5_cmd_alloc_memic(struct mlx5_dm *dm, phys_addr_t *addr,
+			 u64 length, u32 alignment)
 {
-	struct mlx5_core_dev *dev = memic->dev;
+	struct mlx5_core_dev *dev = dm->dev;
 	u64 num_memic_hw_pages = MLX5_CAP_DEV_MEM(dev, memic_bar_size)
 					>> PAGE_SHIFT;
 	u64 hw_start_addr = MLX5_CAP64_DEV_MEM(dev, memic_bar_start_addr);
@@ -115,17 +115,17 @@ int mlx5_cmd_alloc_memic(struct mlx5_memic *memic, phys_addr_t *addr,
 		 mlx5_alignment);
 
 	while (page_idx < num_memic_hw_pages) {
-		spin_lock(&memic->memic_lock);
-		page_idx = bitmap_find_next_zero_area(memic->memic_alloc_pages,
+		spin_lock(&dm->lock);
+		page_idx = bitmap_find_next_zero_area(dm->memic_alloc_pages,
 						      num_memic_hw_pages,
 						      page_idx,
 						      num_pages, 0);
 
 		if (page_idx < num_memic_hw_pages)
-			bitmap_set(memic->memic_alloc_pages,
+			bitmap_set(dm->memic_alloc_pages,
 				   page_idx, num_pages);
 
-		spin_unlock(&memic->memic_lock);
+		spin_unlock(&dm->lock);
 
 		if (page_idx >= num_memic_hw_pages)
 			break;
@@ -135,10 +135,10 @@ int mlx5_cmd_alloc_memic(struct mlx5_memic *memic, phys_addr_t *addr,
 
 		ret = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
 		if (ret) {
-			spin_lock(&memic->memic_lock);
-			bitmap_clear(memic->memic_alloc_pages,
+			spin_lock(&dm->lock);
+			bitmap_clear(dm->memic_alloc_pages,
 				     page_idx, num_pages);
-			spin_unlock(&memic->memic_lock);
+			spin_unlock(&dm->lock);
 
 			if (ret == -EAGAIN) {
 				page_idx++;
@@ -157,9 +157,9 @@ int mlx5_cmd_alloc_memic(struct mlx5_memic *memic, phys_addr_t *addr,
 	return -ENOMEM;
 }
 
-int mlx5_cmd_dealloc_memic(struct mlx5_memic *memic, u64 addr, u64 length)
+int mlx5_cmd_dealloc_memic(struct mlx5_dm *dm, u64 addr, u64 length)
 {
-	struct mlx5_core_dev *dev = memic->dev;
+	struct mlx5_core_dev *dev = dm->dev;
 	u64 hw_start_addr = MLX5_CAP64_DEV_MEM(dev, memic_bar_start_addr);
 	u32 num_pages = DIV_ROUND_UP(length, PAGE_SIZE);
 	u32 out[MLX5_ST_SZ_DW(dealloc_memic_out)] = {0};
@@ -177,10 +177,10 @@ int mlx5_cmd_dealloc_memic(struct mlx5_memic *memic, u64 addr, u64 length)
 	err =  mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
 
 	if (!err) {
-		spin_lock(&memic->memic_lock);
-		bitmap_clear(memic->memic_alloc_pages,
+		spin_lock(&dm->lock);
+		bitmap_clear(dm->memic_alloc_pages,
 			     start_page_idx, num_pages);
-		spin_unlock(&memic->memic_lock);
+		spin_unlock(&dm->lock);
 	}
 
 	return err;
diff --git a/drivers/infiniband/hw/mlx5/cmd.h b/drivers/infiniband/hw/mlx5/cmd.h
index 923a7b9..80a644b 100644
--- a/drivers/infiniband/hw/mlx5/cmd.h
+++ b/drivers/infiniband/hw/mlx5/cmd.h
@@ -44,9 +44,9 @@ int mlx5_cmd_query_cong_params(struct mlx5_core_dev *dev, int cong_point,
 int mlx5_cmd_query_ext_ppcnt_counters(struct mlx5_core_dev *dev, void *out);
 int mlx5_cmd_modify_cong_params(struct mlx5_core_dev *mdev,
 				void *in, int in_size);
-int mlx5_cmd_alloc_memic(struct mlx5_memic *memic, phys_addr_t *addr,
+int mlx5_cmd_alloc_memic(struct mlx5_dm *dm, phys_addr_t *addr,
 			 u64 length, u32 alignment);
-int mlx5_cmd_dealloc_memic(struct mlx5_memic *memic, u64 addr, u64 length);
+int mlx5_cmd_dealloc_memic(struct mlx5_dm *dm, u64 addr, u64 length);
 void mlx5_cmd_dealloc_pd(struct mlx5_core_dev *dev, u32 pdn, u16 uid);
 void mlx5_cmd_destroy_tir(struct mlx5_core_dev *dev, u32 tirn, u16 uid);
 void mlx5_cmd_destroy_tis(struct mlx5_core_dev *dev, u32 tisn, u16 uid);
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index 5ac24bc..97f32a03 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -2264,58 +2264,90 @@ static int mlx5_ib_mmap(struct ib_ucontext *ibcontext, struct vm_area_struct *vm
 	return 0;
 }
 
-struct ib_dm *mlx5_ib_alloc_dm(struct ib_device *ibdev,
-			       struct ib_ucontext *context,
-			       struct ib_dm_alloc_attr *attr,
-			       struct uverbs_attr_bundle *attrs)
+static int handle_alloc_dm_memic(struct ib_ucontext *ctx,
+				 struct mlx5_ib_dm *dm,
+				 struct ib_dm_alloc_attr *attr,
+				 struct uverbs_attr_bundle *attrs)
 {
-	u64 act_size = roundup(attr->length, MLX5_MEMIC_BASE_SIZE);
-	struct mlx5_memic *memic = &to_mdev(ibdev)->memic;
-	phys_addr_t memic_addr;
-	struct mlx5_ib_dm *dm;
+	struct mlx5_dm *dm_db = &to_mdev(ctx->device)->dm;
 	u64 start_offset;
 	u32 page_idx;
 	int err;
 
-	dm = kzalloc(sizeof(*dm), GFP_KERNEL);
-	if (!dm)
-		return ERR_PTR(-ENOMEM);
+	dm->size = roundup(attr->length, MLX5_MEMIC_BASE_SIZE);
 
-	mlx5_ib_dbg(to_mdev(ibdev), "alloc_memic req: user_length=0x%llx act_length=0x%llx log_alignment=%d\n",
-		    attr->length, act_size, attr->alignment);
-
-	err = mlx5_cmd_alloc_memic(memic, &memic_addr,
-				   act_size, attr->alignment);
+	err = mlx5_cmd_alloc_memic(dm_db, &dm->dev_addr,
+				   dm->size, attr->alignment);
 	if (err)
-		goto err_free;
+		return err;
 
-	start_offset = memic_addr & ~PAGE_MASK;
-	page_idx = (memic_addr - memic->dev->bar_addr -
-		    MLX5_CAP64_DEV_MEM(memic->dev, memic_bar_start_addr)) >>
+	page_idx = (dm->dev_addr - pci_resource_start(dm_db->dev->pdev, 0) -
+		    MLX5_CAP64_DEV_MEM(dm_db->dev, memic_bar_start_addr)) >>
 		    PAGE_SHIFT;
 
 	err = uverbs_copy_to(attrs,
-			     MLX5_IB_ATTR_ALLOC_DM_RESP_START_OFFSET,
-			     &start_offset, sizeof(start_offset));
-	if (err)
-		goto err_dealloc;
-
-	err = uverbs_copy_to(attrs,
 			     MLX5_IB_ATTR_ALLOC_DM_RESP_PAGE_INDEX,
 			     &page_idx, sizeof(page_idx));
 	if (err)
 		goto err_dealloc;
 
-	bitmap_set(to_mucontext(context)->dm_pages, page_idx,
-		   DIV_ROUND_UP(act_size, PAGE_SIZE));
+	start_offset = dm->dev_addr & ~PAGE_MASK;
+	err = uverbs_copy_to(attrs,
+			     MLX5_IB_ATTR_ALLOC_DM_RESP_START_OFFSET,
+			     &start_offset, sizeof(start_offset));
+	if (err)
+		goto err_dealloc;
 
-	dm->dev_addr = memic_addr;
+	bitmap_set(to_mucontext(ctx)->dm_pages, page_idx,
+		   DIV_ROUND_UP(dm->size, PAGE_SIZE));
+
+	return 0;
+
+err_dealloc:
+	mlx5_cmd_dealloc_memic(dm_db, dm->dev_addr, dm->size);
+
+	return err;
+}
+
+struct ib_dm *mlx5_ib_alloc_dm(struct ib_device *ibdev,
+			       struct ib_ucontext *context,
+			       struct ib_dm_alloc_attr *attr,
+			       struct uverbs_attr_bundle *attrs)
+{
+	struct mlx5_ib_dm *dm;
+	enum mlx5_ib_uapi_dm_type type;
+	int err;
+
+	err = uverbs_get_const_default(&type, attrs,
+				       MLX5_IB_ATTR_ALLOC_DM_REQ_TYPE,
+				       MLX5_IB_UAPI_DM_TYPE_MEMIC);
+	if (err)
+		return ERR_PTR(err);
+
+	mlx5_ib_dbg(to_mdev(ibdev), "alloc_dm req: dm_type=%d user_length=0x%llx log_alignment=%d\n",
+		    type, attr->length, attr->alignment);
+
+	dm = kzalloc(sizeof(*dm), GFP_KERNEL);
+	if (!dm)
+		return ERR_PTR(-ENOMEM);
+
+	dm->type = type;
+
+	switch (type) {
+	case MLX5_IB_UAPI_DM_TYPE_MEMIC:
+		err = handle_alloc_dm_memic(context, dm,
+					    attr,
+					    attrs);
+		break;
+	default:
+		err = -EOPNOTSUPP;
+	}
+
+	if (err)
+		goto err_free;
 
 	return &dm->ibdm;
 
-err_dealloc:
-	mlx5_cmd_dealloc_memic(memic, memic_addr,
-			       act_size);
 err_free:
 	kfree(dm);
 	return ERR_PTR(err);
@@ -2323,25 +2355,31 @@ struct ib_dm *mlx5_ib_alloc_dm(struct ib_device *ibdev,
 
 int mlx5_ib_dealloc_dm(struct ib_dm *ibdm, struct uverbs_attr_bundle *attrs)
 {
-	struct mlx5_memic *memic = &to_mdev(ibdm->device)->memic;
+	struct mlx5_dm *dm_db = &to_mdev(ibdm->device)->dm;
 	struct mlx5_ib_dm *dm = to_mdm(ibdm);
-	u64 act_size = roundup(dm->ibdm.length, MLX5_MEMIC_BASE_SIZE);
 	u32 page_idx;
 	int ret;
 
-	ret = mlx5_cmd_dealloc_memic(memic, dm->dev_addr, act_size);
-	if (ret)
-		return ret;
+	switch (dm->type) {
+	case MLX5_IB_UAPI_DM_TYPE_MEMIC:
+		ret = mlx5_cmd_dealloc_memic(dm_db, dm->dev_addr, dm->size);
+		if (ret)
+			return ret;
 
-	page_idx = (dm->dev_addr - memic->dev->bar_addr -
-		    MLX5_CAP64_DEV_MEM(memic->dev, memic_bar_start_addr)) >>
-		    PAGE_SHIFT;
-	bitmap_clear(rdma_udata_to_drv_context(
-			&attrs->driver_udata,
-			struct mlx5_ib_ucontext,
-			ibucontext)->dm_pages,
-		     page_idx,
-		     DIV_ROUND_UP(act_size, PAGE_SIZE));
+		page_idx = (dm->dev_addr -
+			    pci_resource_start(dm_db->dev->pdev, 0) -
+			    MLX5_CAP64_DEV_MEM(dm_db->dev,
+					       memic_bar_start_addr)) >>
+			   PAGE_SHIFT;
+		bitmap_clear(rdma_udata_to_drv_context(&attrs->driver_udata,
+						       struct mlx5_ib_ucontext,
+						       ibucontext)
+				     ->dm_pages,
+			     page_idx, DIV_ROUND_UP(dm->size, PAGE_SIZE));
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
 
 	kfree(dm);
 
@@ -5768,7 +5806,10 @@ ADD_UVERBS_ATTRIBUTES_SIMPLE(
 			    UA_MANDATORY),
 	UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_ALLOC_DM_RESP_PAGE_INDEX,
 			    UVERBS_ATTR_TYPE(u16),
-			    UA_MANDATORY));
+			    UA_OPTIONAL),
+	UVERBS_ATTR_CONST_IN(MLX5_IB_ATTR_ALLOC_DM_REQ_TYPE,
+			     enum mlx5_ib_uapi_dm_type,
+			     UA_OPTIONAL));
 
 ADD_UVERBS_ATTRIBUTES_SIMPLE(
 	mlx5_ib_flow_action,
@@ -5916,8 +5957,8 @@ static int mlx5_ib_stage_init_init(struct mlx5_ib_dev *dev)
 	INIT_LIST_HEAD(&dev->qp_list);
 	spin_lock_init(&dev->reset_flow_resource_lock);
 
-	spin_lock_init(&dev->memic.memic_lock);
-	dev->memic.dev = mdev;
+	spin_lock_init(&dev->dm.lock);
+	dev->dm.dev = mdev;
 
 	if (IS_ENABLED(CONFIG_INFINIBAND_ON_DEMAND_PAGING)) {
 		err = init_srcu_struct(&dev->mr_srcu);
diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h
index 55b8bdb..714c360 100644
--- a/drivers/infiniband/hw/mlx5/mlx5_ib.h
+++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h
@@ -48,6 +48,7 @@
 #include <rdma/mlx5-abi.h>
 #include <rdma/uverbs_ioctl.h>
 #include <rdma/mlx5_user_ioctl_cmds.h>
+#include <rdma/mlx5_user_ioctl_verbs.h>
 
 #include "srq.h"
 
@@ -554,15 +555,17 @@ enum mlx5_ib_mtt_access_flags {
 struct mlx5_ib_dm {
 	struct ib_dm		ibdm;
 	phys_addr_t		dev_addr;
+	u32			type;
+	size_t			size;
 };
 
 #define MLX5_IB_MTT_PRESENT (MLX5_IB_MTT_READ | MLX5_IB_MTT_WRITE)
 
-#define MLX5_IB_DM_ALLOWED_ACCESS (IB_ACCESS_LOCAL_WRITE   |\
-				   IB_ACCESS_REMOTE_WRITE  |\
-				   IB_ACCESS_REMOTE_READ   |\
-				   IB_ACCESS_REMOTE_ATOMIC |\
-				   IB_ZERO_BASED)
+#define MLX5_IB_DM_MEMIC_ALLOWED_ACCESS (IB_ACCESS_LOCAL_WRITE   |\
+					 IB_ACCESS_REMOTE_WRITE  |\
+					 IB_ACCESS_REMOTE_READ   |\
+					 IB_ACCESS_REMOTE_ATOMIC |\
+					 IB_ZERO_BASED)
 
 struct mlx5_ib_mr {
 	struct ib_mr		ibmr;
@@ -843,9 +846,13 @@ struct mlx5_ib_flow_action {
 	};
 };
 
-struct mlx5_memic {
+struct mlx5_dm {
 	struct mlx5_core_dev *dev;
-	spinlock_t		memic_lock;
+	/* This lock is used to protect the access to the shared
+	 * allocation map when concurrent requests by different
+	 * processes are handled.
+	 */
+	spinlock_t lock;
 	DECLARE_BITMAP(memic_alloc_pages, MLX5_MAX_MEMIC_PAGES);
 };
 
@@ -949,7 +956,7 @@ struct mlx5_ib_dev {
 	u8			umr_fence;
 	struct list_head	ib_dev_list;
 	u64			sys_image_guid;
-	struct mlx5_memic	memic;
+	struct mlx5_dm		dm;
 	u16			devx_whitelist_uid;
 	struct mlx5_srq_table   srq_table;
 	struct mlx5_async_ctx   async_ctx;
diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c
index 4381cdd..ba35d68 100644
--- a/drivers/infiniband/hw/mlx5/mr.c
+++ b/drivers/infiniband/hw/mlx5/mr.c
@@ -1159,8 +1159,8 @@ static void set_mr_fields(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr,
 	mr->access_flags = access_flags;
 }
 
-static struct ib_mr *mlx5_ib_get_memic_mr(struct ib_pd *pd, u64 memic_addr,
-					  u64 length, int acc)
+static struct ib_mr *mlx5_ib_get_dm_mr(struct ib_pd *pd, u64 start_addr,
+				       u64 length, int acc, int mode)
 {
 	struct mlx5_ib_dev *dev = to_mdev(pd->device);
 	int inlen = MLX5_ST_SZ_BYTES(create_mkey_in);
@@ -1182,9 +1182,8 @@ static struct ib_mr *mlx5_ib_get_memic_mr(struct ib_pd *pd, u64 memic_addr,
 
 	mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry);
 
-	MLX5_SET(mkc, mkc, access_mode_1_0, MLX5_MKC_ACCESS_MODE_MEMIC & 0x3);
-	MLX5_SET(mkc, mkc, access_mode_4_2,
-		 (MLX5_MKC_ACCESS_MODE_MEMIC >> 2) & 0x7);
+	MLX5_SET(mkc, mkc, access_mode_1_0, mode & 0x3);
+	MLX5_SET(mkc, mkc, access_mode_4_2, (mode >> 2) & 0x7);
 	MLX5_SET(mkc, mkc, a, !!(acc & IB_ACCESS_REMOTE_ATOMIC));
 	MLX5_SET(mkc, mkc, rw, !!(acc & IB_ACCESS_REMOTE_WRITE));
 	MLX5_SET(mkc, mkc, rr, !!(acc & IB_ACCESS_REMOTE_READ));
@@ -1194,7 +1193,7 @@ static struct ib_mr *mlx5_ib_get_memic_mr(struct ib_pd *pd, u64 memic_addr,
 	MLX5_SET64(mkc, mkc, len, length);
 	MLX5_SET(mkc, mkc, pd, to_mpd(pd)->pdn);
 	MLX5_SET(mkc, mkc, qpn, 0xffffff);
-	MLX5_SET64(mkc, mkc, start_addr, memic_addr - dev->mdev->bar_addr);
+	MLX5_SET64(mkc, mkc, start_addr, start_addr);
 
 	err = mlx5_core_create_mkey(mdev, &mr->mmkey, in, inlen);
 	if (err)
@@ -1236,15 +1235,24 @@ struct ib_mr *mlx5_ib_reg_dm_mr(struct ib_pd *pd, struct ib_dm *dm,
 				struct uverbs_attr_bundle *attrs)
 {
 	struct mlx5_ib_dm *mdm = to_mdm(dm);
-	u64 memic_addr;
+	struct mlx5_core_dev *dev = to_mdev(dm->device)->mdev;
+	u64 start_addr = mdm->dev_addr + attr->offset;
+	int mode;
 
-	if (attr->access_flags & ~MLX5_IB_DM_ALLOWED_ACCESS)
+	switch (mdm->type) {
+	case MLX5_IB_UAPI_DM_TYPE_MEMIC:
+		if (attr->access_flags & ~MLX5_IB_DM_MEMIC_ALLOWED_ACCESS)
+			return ERR_PTR(-EINVAL);
+
+		mode = MLX5_MKC_ACCESS_MODE_MEMIC;
+		start_addr -= pci_resource_start(dev->pdev, 0);
+		break;
+	default:
 		return ERR_PTR(-EINVAL);
+	}
 
-	memic_addr = mdm->dev_addr + attr->offset;
-
-	return mlx5_ib_get_memic_mr(pd, memic_addr, attr->length,
-				    attr->access_flags);
+	return mlx5_ib_get_dm_mr(pd, start_addr, attr->length,
+				 attr->access_flags, mode);
 }
 
 struct ib_mr *mlx5_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
diff --git a/include/uapi/rdma/mlx5_user_ioctl_cmds.h b/include/uapi/rdma/mlx5_user_ioctl_cmds.h
index 0d8f564..d404c95 100644
--- a/include/uapi/rdma/mlx5_user_ioctl_cmds.h
+++ b/include/uapi/rdma/mlx5_user_ioctl_cmds.h
@@ -44,6 +44,7 @@ enum mlx5_ib_create_flow_action_attrs {
 enum mlx5_ib_alloc_dm_attrs {
 	MLX5_IB_ATTR_ALLOC_DM_RESP_START_OFFSET = (1U << UVERBS_ID_NS_SHIFT),
 	MLX5_IB_ATTR_ALLOC_DM_RESP_PAGE_INDEX,
+	MLX5_IB_ATTR_ALLOC_DM_REQ_TYPE,
 };
 
 enum mlx5_ib_devx_methods {
diff --git a/include/uapi/rdma/mlx5_user_ioctl_verbs.h b/include/uapi/rdma/mlx5_user_ioctl_verbs.h
index 0a126a6..c291fb2 100644
--- a/include/uapi/rdma/mlx5_user_ioctl_verbs.h
+++ b/include/uapi/rdma/mlx5_user_ioctl_verbs.h
@@ -57,5 +57,9 @@ struct mlx5_ib_uapi_devx_async_cmd_hdr {
 	__u8		out_data[];
 };
 
+enum mlx5_ib_uapi_dm_type {
+	MLX5_IB_UAPI_DM_TYPE_MEMIC,
+};
+
 #endif