diff --git a/drivers/s390/net/ism.h b/drivers/s390/net/ism.h
index 38fe90c2597d1..70c5bbda0feaa 100644
--- a/drivers/s390/net/ism.h
+++ b/drivers/s390/net/ism.h
@@ -5,6 +5,7 @@
 #include <linux/spinlock.h>
 #include <linux/types.h>
 #include <linux/pci.h>
+#include <linux/ism.h>
 #include <net/smc.h>
 #include <asm/pci_insn.h>
 
@@ -15,7 +16,6 @@
  */
 #define ISM_DMB_WORD_OFFSET	1
 #define ISM_DMB_BIT_OFFSET	(ISM_DMB_WORD_OFFSET * 32)
-#define ISM_NR_DMBS		1920
 #define ISM_IDENT_MASK		0x00FFFF
 
 #define ISM_REG_SBA	0x1
@@ -177,7 +177,7 @@ struct ism_eq_header {
 
 struct ism_eq {
 	struct ism_eq_header header;
-	struct smcd_event entry[15];
+	struct ism_event entry[15];
 };
 
 struct ism_sba {
@@ -189,21 +189,6 @@ struct ism_sba {
 	u16 dmbe_mask[ISM_NR_DMBS];
 };
 
-struct ism_dev {
-	spinlock_t lock;
-	struct pci_dev *pdev;
-	struct smcd_dev *smcd;
-
-	struct ism_sba *sba;
-	dma_addr_t sba_dma_addr;
-	DECLARE_BITMAP(sba_bitmap, ISM_NR_DMBS);
-
-	struct ism_eq *ieq;
-	dma_addr_t ieq_dma_addr;
-
-	int ieq_idx;
-};
-
 #define ISM_CREATE_REQ(dmb, idx, sf, offset)		\
 	((dmb) | (idx) << 24 | (sf) << 23 | (offset))
 
diff --git a/drivers/s390/net/ism_drv.c b/drivers/s390/net/ism_drv.c
index dfd401d9e3623..eb7e134860878 100644
--- a/drivers/s390/net/ism_drv.c
+++ b/drivers/s390/net/ism_drv.c
@@ -15,9 +15,6 @@
 #include <linux/err.h>
 #include <linux/ctype.h>
 #include <linux/processor.h>
-#include <net/smc.h>
-
-#include <asm/debug.h>
 
 #include "ism.h"
 
@@ -34,6 +31,84 @@ static const struct pci_device_id ism_device_table[] = {
 MODULE_DEVICE_TABLE(pci, ism_device_table);
 
 static debug_info_t *ism_debug_info;
+static const struct smcd_ops ism_ops;
+
+#define NO_CLIENT		0xff		/* must be >= MAX_CLIENTS */
+static struct ism_client *clients[MAX_CLIENTS];	/* use an array rather than */
+						/* a list for fast mapping  */
+static u8 max_client;
+static DEFINE_SPINLOCK(clients_lock);
+struct ism_dev_list {
+	struct list_head list;
+	struct mutex mutex; /* protects ism device list */
+};
+
+static struct ism_dev_list ism_dev_list = {
+	.list = LIST_HEAD_INIT(ism_dev_list.list),
+	.mutex = __MUTEX_INITIALIZER(ism_dev_list.mutex),
+};
+
+int ism_register_client(struct ism_client *client)
+{
+	struct ism_dev *ism;
+	unsigned long flags;
+	int i, rc = -ENOSPC;
+
+	mutex_lock(&ism_dev_list.mutex);
+	spin_lock_irqsave(&clients_lock, flags);
+	for (i = 0; i < MAX_CLIENTS; ++i) {
+		if (!clients[i]) {
+			clients[i] = client;
+			client->id = i;
+			if (i == max_client)
+				max_client++;
+			rc = 0;
+			break;
+		}
+	}
+	spin_unlock_irqrestore(&clients_lock, flags);
+	if (i < MAX_CLIENTS) {
+		/* initialize with all devices that we got so far */
+		list_for_each_entry(ism, &ism_dev_list.list, list) {
+			ism->priv[i] = NULL;
+			client->add(ism);
+		}
+	}
+	mutex_unlock(&ism_dev_list.mutex);
+
+	return rc;
+}
+EXPORT_SYMBOL_GPL(ism_register_client);
+
+int ism_unregister_client(struct ism_client *client)
+{
+	struct ism_dev *ism;
+	unsigned long flags;
+	int rc = 0;
+
+	mutex_lock(&ism_dev_list.mutex);
+	spin_lock_irqsave(&clients_lock, flags);
+	clients[client->id] = NULL;
+	if (client->id + 1 == max_client)
+		max_client--;
+	spin_unlock_irqrestore(&clients_lock, flags);
+	list_for_each_entry(ism, &ism_dev_list.list, list) {
+		for (int i = 0; i < ISM_NR_DMBS; ++i) {
+			if (ism->sba_client_arr[i] == client->id) {
+				pr_err("%s: attempt to unregister client '%s'"
+				       "with registered dmb(s)\n", __func__,
+				       client->name);
+				rc = -EBUSY;
+				goto out;
+			}
+		}
+	}
+out:
+	mutex_unlock(&ism_dev_list.mutex);
+
+	return rc;
+}
+EXPORT_SYMBOL_GPL(ism_unregister_client);
 
 static int ism_cmd(struct ism_dev *ism, void *cmd)
 {
@@ -193,15 +268,14 @@ static int ism_read_local_gid(struct ism_dev *ism)
 	if (ret)
 		goto out;
 
-	ism->smcd->local_gid = cmd.response.gid;
+	ism->local_gid = cmd.response.gid;
 out:
 	return ret;
 }
 
-static int ism_query_rgid(struct smcd_dev *smcd, u64 rgid, u32 vid_valid,
+static int ism_query_rgid(struct ism_dev *ism, u64 rgid, u32 vid_valid,
 			  u32 vid)
 {
-	struct ism_dev *ism = smcd->priv;
 	union ism_query_rgid cmd;
 
 	memset(&cmd, 0, sizeof(cmd));
@@ -215,14 +289,14 @@ static int ism_query_rgid(struct smcd_dev *smcd, u64 rgid, u32 vid_valid,
 	return ism_cmd(ism, &cmd);
 }
 
-static void ism_free_dmb(struct ism_dev *ism, struct smcd_dmb *dmb)
+static void ism_free_dmb(struct ism_dev *ism, struct ism_dmb *dmb)
 {
 	clear_bit(dmb->sba_idx, ism->sba_bitmap);
 	dma_free_coherent(&ism->pdev->dev, dmb->dmb_len,
 			  dmb->cpu_addr, dmb->dma_addr);
 }
 
-static int ism_alloc_dmb(struct ism_dev *ism, struct smcd_dmb *dmb)
+static int ism_alloc_dmb(struct ism_dev *ism, struct ism_dmb *dmb)
 {
 	unsigned long bit;
 
@@ -251,9 +325,9 @@ static int ism_alloc_dmb(struct ism_dev *ism, struct smcd_dmb *dmb)
 	return dmb->cpu_addr ? 0 : -ENOMEM;
 }
 
-static int ism_register_dmb(struct smcd_dev *smcd, struct smcd_dmb *dmb)
+int ism_register_dmb(struct ism_dev *ism, struct ism_dmb *dmb,
+		     struct ism_client *client)
 {
-	struct ism_dev *ism = smcd->priv;
 	union ism_reg_dmb cmd;
 	int ret;
 
@@ -278,13 +352,14 @@ static int ism_register_dmb(struct smcd_dev *smcd, struct smcd_dmb *dmb)
 		goto out;
 	}
 	dmb->dmb_tok = cmd.response.dmb_tok;
+	ism->sba_client_arr[dmb->sba_idx - ISM_DMB_BIT_OFFSET] = client->id;
 out:
 	return ret;
 }
+EXPORT_SYMBOL_GPL(ism_register_dmb);
 
-static int ism_unregister_dmb(struct smcd_dev *smcd, struct smcd_dmb *dmb)
+int ism_unregister_dmb(struct ism_dev *ism, struct ism_dmb *dmb)
 {
-	struct ism_dev *ism = smcd->priv;
 	union ism_unreg_dmb cmd;
 	int ret;
 
@@ -294,6 +369,8 @@ static int ism_unregister_dmb(struct smcd_dev *smcd, struct smcd_dmb *dmb)
 
 	cmd.request.dmb_tok = dmb->dmb_tok;
 
+	ism->sba_client_arr[dmb->sba_idx - ISM_DMB_BIT_OFFSET] = NO_CLIENT;
+
 	ret = ism_cmd(ism, &cmd);
 	if (ret && ret != ISM_ERROR)
 		goto out;
@@ -302,10 +379,10 @@ static int ism_unregister_dmb(struct smcd_dev *smcd, struct smcd_dmb *dmb)
 out:
 	return ret;
 }
+EXPORT_SYMBOL_GPL(ism_unregister_dmb);
 
-static int ism_add_vlan_id(struct smcd_dev *smcd, u64 vlan_id)
+static int ism_add_vlan_id(struct ism_dev *ism, u64 vlan_id)
 {
-	struct ism_dev *ism = smcd->priv;
 	union ism_set_vlan_id cmd;
 
 	memset(&cmd, 0, sizeof(cmd));
@@ -317,9 +394,8 @@ static int ism_add_vlan_id(struct smcd_dev *smcd, u64 vlan_id)
 	return ism_cmd(ism, &cmd);
 }
 
-static int ism_del_vlan_id(struct smcd_dev *smcd, u64 vlan_id)
+static int ism_del_vlan_id(struct ism_dev *ism, u64 vlan_id)
 {
-	struct ism_dev *ism = smcd->priv;
 	union ism_set_vlan_id cmd;
 
 	memset(&cmd, 0, sizeof(cmd));
@@ -331,20 +407,9 @@ static int ism_del_vlan_id(struct smcd_dev *smcd, u64 vlan_id)
 	return ism_cmd(ism, &cmd);
 }
 
-static int ism_set_vlan_required(struct smcd_dev *smcd)
-{
-	return ism_cmd_simple(smcd->priv, ISM_SET_VLAN);
-}
-
-static int ism_reset_vlan_required(struct smcd_dev *smcd)
-{
-	return ism_cmd_simple(smcd->priv, ISM_RESET_VLAN);
-}
-
-static int ism_signal_ieq(struct smcd_dev *smcd, u64 rgid, u32 trigger_irq,
+static int ism_signal_ieq(struct ism_dev *ism, u64 rgid, u32 trigger_irq,
 			  u32 event_code, u64 info)
 {
-	struct ism_dev *ism = smcd->priv;
 	union ism_sig_ieq cmd;
 
 	memset(&cmd, 0, sizeof(cmd));
@@ -365,10 +430,9 @@ static unsigned int max_bytes(unsigned int start, unsigned int len,
 	return min(boundary - (start & (boundary - 1)), len);
 }
 
-static int ism_move(struct smcd_dev *smcd, u64 dmb_tok, unsigned int idx,
-		    bool sf, unsigned int offset, void *data, unsigned int size)
+int ism_move(struct ism_dev *ism, u64 dmb_tok, unsigned int idx, bool sf,
+	     unsigned int offset, void *data, unsigned int size)
 {
-	struct ism_dev *ism = smcd->priv;
 	unsigned int bytes;
 	u64 dmb_req;
 	int ret;
@@ -389,6 +453,7 @@ static int ism_move(struct smcd_dev *smcd, u64 dmb_tok, unsigned int idx,
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(ism_move);
 
 static struct ism_systemeid SYSTEM_EID = {
 	.seid_string = "IBM-SYSZ-ISMSEID00000000",
@@ -410,15 +475,14 @@ static void ism_create_system_eid(void)
 	memcpy(&SYSTEM_EID.type, tmp, 4);
 }
 
-static u8 *ism_get_system_eid(void)
+u8 *ism_get_seid(void)
 {
 	return SYSTEM_EID.seid_string;
 }
+EXPORT_SYMBOL_GPL(ism_get_seid);
 
-static u16 ism_get_chid(struct smcd_dev *smcd)
+static u16 ism_get_chid(struct ism_dev *ism)
 {
-	struct ism_dev *ism = (struct ism_dev *)smcd->priv;
-
 	if (!ism || !ism->pdev)
 		return 0;
 
@@ -427,7 +491,8 @@ static u16 ism_get_chid(struct smcd_dev *smcd)
 
 static void ism_handle_event(struct ism_dev *ism)
 {
-	struct smcd_event *entry;
+	struct ism_event *entry;
+	int i;
 
 	while ((ism->ieq_idx + 1) != READ_ONCE(ism->ieq->header.idx)) {
 		if (++(ism->ieq_idx) == ARRAY_SIZE(ism->ieq->entry))
@@ -435,13 +500,18 @@ static void ism_handle_event(struct ism_dev *ism)
 
 		entry = &ism->ieq->entry[ism->ieq_idx];
 		debug_event(ism_debug_info, 2, entry, sizeof(*entry));
-		smcd_handle_event(ism->smcd, entry);
+		spin_lock(&clients_lock);
+		for (i = 0; i < max_client; ++i)
+			if (clients[i])
+				clients[i]->handle_event(ism, entry);
+		spin_unlock(&clients_lock);
 	}
 }
 
 static irqreturn_t ism_handle_irq(int irq, void *data)
 {
 	struct ism_dev *ism = data;
+	struct ism_client *clt;
 	unsigned long bit, end;
 	unsigned long *bv;
 	u16 dmbemask;
@@ -461,7 +531,8 @@ static irqreturn_t ism_handle_irq(int irq, void *data)
 		dmbemask = ism->sba->dmbe_mask[bit + ISM_DMB_BIT_OFFSET];
 		ism->sba->dmbe_mask[bit + ISM_DMB_BIT_OFFSET] = 0;
 		barrier();
-		smcd_handle_irq(ism->smcd, bit + ISM_DMB_BIT_OFFSET, dmbemask);
+		clt = clients[ism->sba_client_arr[bit]];
+		clt->handle_irq(ism, bit + ISM_DMB_BIT_OFFSET, dmbemask);
 	}
 
 	if (ism->sba->e) {
@@ -473,33 +544,40 @@ static irqreturn_t ism_handle_irq(int irq, void *data)
 	return IRQ_HANDLED;
 }
 
-static const struct smcd_ops ism_ops = {
-	.query_remote_gid = ism_query_rgid,
-	.register_dmb = ism_register_dmb,
-	.unregister_dmb = ism_unregister_dmb,
-	.add_vlan_id = ism_add_vlan_id,
-	.del_vlan_id = ism_del_vlan_id,
-	.set_vlan_required = ism_set_vlan_required,
-	.reset_vlan_required = ism_reset_vlan_required,
-	.signal_event = ism_signal_ieq,
-	.move_data = ism_move,
-	.get_system_eid = ism_get_system_eid,
-	.get_chid = ism_get_chid,
-};
+static u64 ism_get_local_gid(struct ism_dev *ism)
+{
+	return ism->local_gid;
+}
+
+static void ism_dev_add_work_func(struct work_struct *work)
+{
+	struct ism_client *client = container_of(work, struct ism_client,
+						 add_work);
+
+	client->add(client->tgt_ism);
+	atomic_dec(&client->tgt_ism->add_dev_cnt);
+	wake_up(&client->tgt_ism->waitq);
+}
 
 static int ism_dev_init(struct ism_dev *ism)
 {
 	struct pci_dev *pdev = ism->pdev;
-	int ret;
+	unsigned long flags;
+	int i, ret;
 
 	ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_MSI);
 	if (ret <= 0)
 		goto out;
 
+	ism->sba_client_arr = kzalloc(ISM_NR_DMBS, GFP_KERNEL);
+	if (!ism->sba_client_arr)
+		goto free_vectors;
+	memset(ism->sba_client_arr, NO_CLIENT, ISM_NR_DMBS);
+
 	ret = request_irq(pci_irq_vector(pdev, 0), ism_handle_irq, 0,
 			  pci_name(pdev), ism);
 	if (ret)
-		goto free_vectors;
+		goto free_client_arr;
 
 	ret = register_sba(ism);
 	if (ret)
@@ -513,13 +591,31 @@ static int ism_dev_init(struct ism_dev *ism)
 	if (ret)
 		goto unreg_ieq;
 
-	if (!ism_add_vlan_id(ism->smcd, ISM_RESERVED_VLANID))
+	if (!ism_add_vlan_id(ism, ISM_RESERVED_VLANID))
 		/* hardware is V2 capable */
 		ism_create_system_eid();
 
-	ret = smcd_register_dev(ism->smcd);
-	if (ret)
-		goto unreg_ieq;
+	init_waitqueue_head(&ism->waitq);
+	atomic_set(&ism->free_clients_cnt, 0);
+	atomic_set(&ism->add_dev_cnt, 0);
+
+	wait_event(ism->waitq, !atomic_read(&ism->add_dev_cnt));
+	spin_lock_irqsave(&clients_lock, flags);
+	for (i = 0; i < max_client; ++i)
+		if (clients[i]) {
+			INIT_WORK(&clients[i]->add_work,
+				  ism_dev_add_work_func);
+			clients[i]->tgt_ism = ism;
+			atomic_inc(&ism->add_dev_cnt);
+			schedule_work(&clients[i]->add_work);
+		}
+	spin_unlock_irqrestore(&clients_lock, flags);
+
+	wait_event(ism->waitq, !atomic_read(&ism->add_dev_cnt));
+
+	mutex_lock(&ism_dev_list.mutex);
+	list_add(&ism->list, &ism_dev_list.list);
+	mutex_unlock(&ism_dev_list.mutex);
 
 	query_info(ism);
 	return 0;
@@ -530,6 +626,8 @@ static int ism_dev_init(struct ism_dev *ism)
 	unregister_sba(ism);
 free_irq:
 	free_irq(pci_irq_vector(pdev, 0), ism);
+free_client_arr:
+	kfree(ism->sba_client_arr);
 free_vectors:
 	pci_free_irq_vectors(pdev);
 out:
@@ -548,6 +646,12 @@ static int ism_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	spin_lock_init(&ism->lock);
 	dev_set_drvdata(&pdev->dev, ism);
 	ism->pdev = pdev;
+	ism->dev.parent = &pdev->dev;
+	device_initialize(&ism->dev);
+	dev_set_name(&ism->dev, dev_name(&pdev->dev));
+	ret = device_add(&ism->dev);
+	if (ret)
+		goto err_dev;
 
 	ret = pci_enable_device_mem(pdev);
 	if (ret)
@@ -565,55 +669,80 @@ static int ism_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	dma_set_max_seg_size(&pdev->dev, SZ_1M);
 	pci_set_master(pdev);
 
-	ism->smcd = smcd_alloc_dev(&pdev->dev, dev_name(&pdev->dev), &ism_ops,
-				   ISM_NR_DMBS);
-	if (!ism->smcd) {
-		ret = -ENOMEM;
-		goto err_resource;
-	}
-
-	ism->smcd->priv = ism;
 	ret = ism_dev_init(ism);
 	if (ret)
-		goto err_free;
+		goto err_resource;
 
 	return 0;
 
-err_free:
-	smcd_free_dev(ism->smcd);
 err_resource:
+	pci_clear_master(pdev);
 	pci_release_mem_regions(pdev);
 err_disable:
 	pci_disable_device(pdev);
 err:
-	kfree(ism);
+	device_del(&ism->dev);
+err_dev:
 	dev_set_drvdata(&pdev->dev, NULL);
+	kfree(ism);
+
 	return ret;
 }
 
+static void ism_dev_remove_work_func(struct work_struct *work)
+{
+	struct ism_client *client = container_of(work, struct ism_client,
+						 remove_work);
+
+	client->remove(client->tgt_ism);
+	atomic_dec(&client->tgt_ism->free_clients_cnt);
+	wake_up(&client->tgt_ism->waitq);
+}
+
+/* Callers must hold ism_dev_list.mutex */
 static void ism_dev_exit(struct ism_dev *ism)
 {
 	struct pci_dev *pdev = ism->pdev;
+	unsigned long flags;
+	int i;
+
+	wait_event(ism->waitq, !atomic_read(&ism->free_clients_cnt));
+	spin_lock_irqsave(&clients_lock, flags);
+	for (i = 0; i < max_client; ++i)
+		if (clients[i]) {
+			INIT_WORK(&clients[i]->remove_work,
+				  ism_dev_remove_work_func);
+			clients[i]->tgt_ism = ism;
+			atomic_inc(&ism->free_clients_cnt);
+			schedule_work(&clients[i]->remove_work);
+		}
+	spin_unlock_irqrestore(&clients_lock, flags);
+
+	wait_event(ism->waitq, !atomic_read(&ism->free_clients_cnt));
 
-	smcd_unregister_dev(ism->smcd);
 	if (SYSTEM_EID.serial_number[0] != '0' ||
 	    SYSTEM_EID.type[0] != '0')
-		ism_del_vlan_id(ism->smcd, ISM_RESERVED_VLANID);
+		ism_del_vlan_id(ism, ISM_RESERVED_VLANID);
 	unregister_ieq(ism);
 	unregister_sba(ism);
 	free_irq(pci_irq_vector(pdev, 0), ism);
+	kfree(ism->sba_client_arr);
 	pci_free_irq_vectors(pdev);
+	list_del_init(&ism->list);
 }
 
 static void ism_remove(struct pci_dev *pdev)
 {
 	struct ism_dev *ism = dev_get_drvdata(&pdev->dev);
 
+	mutex_lock(&ism_dev_list.mutex);
 	ism_dev_exit(ism);
+	mutex_unlock(&ism_dev_list.mutex);
 
-	smcd_free_dev(ism->smcd);
+	pci_clear_master(pdev);
 	pci_release_mem_regions(pdev);
 	pci_disable_device(pdev);
+	device_del(&ism->dev);
 	dev_set_drvdata(&pdev->dev, NULL);
 	kfree(ism);
 }
@@ -633,6 +762,8 @@ static int __init ism_init(void)
 	if (!ism_debug_info)
 		return -ENODEV;
 
+	memset(clients, 0, sizeof(clients));
+	max_client = 0;
 	debug_register_view(ism_debug_info, &debug_hex_ascii_view);
 	ret = pci_register_driver(&ism_driver);
 	if (ret)
@@ -643,9 +774,110 @@ static int __init ism_init(void)
 
 static void __exit ism_exit(void)
 {
+	struct ism_dev *ism;
+
+	mutex_lock(&ism_dev_list.mutex);
+	list_for_each_entry(ism, &ism_dev_list.list, list) {
+		ism_dev_exit(ism);
+	}
+	mutex_unlock(&ism_dev_list.mutex);
+
 	pci_unregister_driver(&ism_driver);
 	debug_unregister(ism_debug_info);
 }
 
 module_init(ism_init);
 module_exit(ism_exit);
+
+/*************************** SMC-D Implementation *****************************/
+
+#if IS_ENABLED(CONFIG_SMC)
+static int smcd_query_rgid(struct smcd_dev *smcd, u64 rgid, u32 vid_valid,
+			   u32 vid)
+{
+	return ism_query_rgid(smcd->priv, rgid, vid_valid, vid);
+}
+
+static int smcd_register_dmb(struct smcd_dev *smcd, struct smcd_dmb *dmb,
+			     struct ism_client *client)
+{
+	return ism_register_dmb(smcd->priv, (struct ism_dmb *)dmb, client);
+}
+
+static int smcd_unregister_dmb(struct smcd_dev *smcd, struct smcd_dmb *dmb)
+{
+	return ism_unregister_dmb(smcd->priv, (struct ism_dmb *)dmb);
+}
+
+static int smcd_add_vlan_id(struct smcd_dev *smcd, u64 vlan_id)
+{
+	return ism_add_vlan_id(smcd->priv, vlan_id);
+}
+
+static int smcd_del_vlan_id(struct smcd_dev *smcd, u64 vlan_id)
+{
+	return ism_del_vlan_id(smcd->priv, vlan_id);
+}
+
+static int smcd_set_vlan_required(struct smcd_dev *smcd)
+{
+	return ism_cmd_simple(smcd->priv, ISM_SET_VLAN);
+}
+
+static int smcd_reset_vlan_required(struct smcd_dev *smcd)
+{
+	return ism_cmd_simple(smcd->priv, ISM_RESET_VLAN);
+}
+
+static int smcd_signal_ieq(struct smcd_dev *smcd, u64 rgid, u32 trigger_irq,
+			   u32 event_code, u64 info)
+{
+	return ism_signal_ieq(smcd->priv, rgid, trigger_irq, event_code, info);
+}
+
+static int smcd_move(struct smcd_dev *smcd, u64 dmb_tok, unsigned int idx,
+		     bool sf, unsigned int offset, void *data,
+		     unsigned int size)
+{
+	return ism_move(smcd->priv, dmb_tok, idx, sf, offset, data, size);
+}
+
+static u64 smcd_get_local_gid(struct smcd_dev *smcd)
+{
+	return ism_get_local_gid(smcd->priv);
+}
+
+static u16 smcd_get_chid(struct smcd_dev *smcd)
+{
+	return ism_get_chid(smcd->priv);
+}
+
+static inline struct device *smcd_get_dev(struct smcd_dev *dev)
+{
+	struct ism_dev *ism = dev->priv;
+
+	return &ism->dev;
+}
+
+static const struct smcd_ops ism_ops = {
+	.query_remote_gid = smcd_query_rgid,
+	.register_dmb = smcd_register_dmb,
+	.unregister_dmb = smcd_unregister_dmb,
+	.add_vlan_id = smcd_add_vlan_id,
+	.del_vlan_id = smcd_del_vlan_id,
+	.set_vlan_required = smcd_set_vlan_required,
+	.reset_vlan_required = smcd_reset_vlan_required,
+	.signal_event = smcd_signal_ieq,
+	.move_data = smcd_move,
+	.get_system_eid = ism_get_seid,
+	.get_local_gid = smcd_get_local_gid,
+	.get_chid = smcd_get_chid,
+	.get_dev = smcd_get_dev,
+};
+
+const struct smcd_ops *ism_get_smcd_ops(void)
+{
+	return &ism_ops;
+}
+EXPORT_SYMBOL_GPL(ism_get_smcd_ops);
+#endif
diff --git a/include/linux/ism.h b/include/linux/ism.h
new file mode 100644
index 0000000000000..ea2bcdae74012
--- /dev/null
+++ b/include/linux/ism.h
@@ -0,0 +1,98 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ *  Internal Shared Memory
+ *
+ *  Definitions for the ISM module
+ *
+ *  Copyright IBM Corp. 2022
+ */
+#ifndef _ISM_H
+#define _ISM_H
+
+#include <linux/workqueue.h>
+
+struct ism_dmb {
+	u64 dmb_tok;
+	u64 rgid;
+	u32 dmb_len;
+	u32 sba_idx;
+	u32 vlan_valid;
+	u32 vlan_id;
+	void *cpu_addr;
+	dma_addr_t dma_addr;
+};
+
+/* Unless we gain unexpected popularity, this limit should hold for a while */
+#define MAX_CLIENTS		8
+#define ISM_NR_DMBS		1920
+
+struct ism_dev {
+	spinlock_t lock; /* protects the ism device */
+	struct list_head list;
+	struct pci_dev *pdev;
+
+	struct ism_sba *sba;
+	dma_addr_t sba_dma_addr;
+	DECLARE_BITMAP(sba_bitmap, ISM_NR_DMBS);
+	u8 *sba_client_arr;	/* entries are indices into 'clients' array */
+	void *priv[MAX_CLIENTS];
+
+	struct ism_eq *ieq;
+	dma_addr_t ieq_dma_addr;
+
+	struct device dev;
+	u64 local_gid;
+	int ieq_idx;
+
+	atomic_t free_clients_cnt;
+	atomic_t add_dev_cnt;
+	wait_queue_head_t waitq;
+};
+
+struct ism_event {
+	u32 type;
+	u32 code;
+	u64 tok;
+	u64 time;
+	u64 info;
+};
+
+struct ism_client {
+	const char *name;
+	void (*add)(struct ism_dev *dev);
+	void (*remove)(struct ism_dev *dev);
+	void (*handle_event)(struct ism_dev *dev, struct ism_event *event);
+	/* Parameter dmbemask contains a bit vector with updated DMBEs, if sent
+	 * via ism_move_data(). Callback function must handle all active bits
+	 * indicated by dmbemask.
+	 */
+	void (*handle_irq)(struct ism_dev *dev, unsigned int bit, u16 dmbemask);
+	/* Private area - don't touch! */
+	struct work_struct remove_work;
+	struct work_struct add_work;
+	struct ism_dev *tgt_ism;
+	u8 id;
+};
+
+int ism_register_client(struct ism_client *client);
+int  ism_unregister_client(struct ism_client *client);
+static inline void *ism_get_priv(struct ism_dev *dev,
+				 struct ism_client *client) {
+	return dev->priv[client->id];
+}
+
+static inline void ism_set_priv(struct ism_dev *dev, struct ism_client *client,
+				void *priv) {
+	dev->priv[client->id] = priv;
+}
+
+int  ism_register_dmb(struct ism_dev *dev, struct ism_dmb *dmb,
+		      struct ism_client *client);
+int  ism_unregister_dmb(struct ism_dev *dev, struct ism_dmb *dmb);
+int  ism_move(struct ism_dev *dev, u64 dmb_tok, unsigned int idx, bool sf,
+	      unsigned int offset, void *data, unsigned int size);
+u8  *ism_get_seid(void);
+
+const struct smcd_ops *ism_get_smcd_ops(void);
+
+#endif	/* _ISM_H */
diff --git a/include/net/smc.h b/include/net/smc.h
index c926d3313e051..597cb93811827 100644
--- a/include/net/smc.h
+++ b/include/net/smc.h
@@ -15,6 +15,7 @@
 #include <linux/spinlock.h>
 #include <linux/types.h>
 #include <linux/wait.h>
+#include "linux/ism.h"
 
 struct sock;
 
@@ -48,20 +49,14 @@ struct smcd_dmb {
 
 #define ISM_ERROR	0xFFFF
 
-struct smcd_event {
-	u32 type;
-	u32 code;
-	u64 tok;
-	u64 time;
-	u64 info;
-};
-
 struct smcd_dev;
+struct ism_client;
 
 struct smcd_ops {
 	int (*query_remote_gid)(struct smcd_dev *dev, u64 rgid, u32 vid_valid,
 				u32 vid);
-	int (*register_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb);
+	int (*register_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb,
+			    struct ism_client *client);
 	int (*unregister_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb);
 	int (*add_vlan_id)(struct smcd_dev *dev, u64 vlan_id);
 	int (*del_vlan_id)(struct smcd_dev *dev, u64 vlan_id);
@@ -73,14 +68,14 @@ struct smcd_ops {
 			 bool sf, unsigned int offset, void *data,
 			 unsigned int size);
 	u8* (*get_system_eid)(void);
+	u64 (*get_local_gid)(struct smcd_dev *dev);
 	u16 (*get_chid)(struct smcd_dev *dev);
+	struct device* (*get_dev)(struct smcd_dev *dev);
 };
 
 struct smcd_dev {
 	const struct smcd_ops *ops;
-	struct device dev;
 	void *priv;
-	u64 local_gid;
 	struct list_head list;
 	spinlock_t lock;
 	struct smc_connection **conn;
@@ -95,11 +90,4 @@ struct smcd_dev {
 	u8 going_away : 1;
 };
 
-struct smcd_dev *smcd_alloc_dev(struct device *parent, const char *name,
-				const struct smcd_ops *ops, int max_dmbs);
-int smcd_register_dev(struct smcd_dev *smcd);
-void smcd_unregister_dev(struct smcd_dev *smcd);
-void smcd_free_dev(struct smcd_dev *smcd);
-void smcd_handle_event(struct smcd_dev *dev, struct smcd_event *event);
-void smcd_handle_irq(struct smcd_dev *dev, unsigned int bit, u16 dmbemask);
 #endif	/* _SMC_H */
diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index e12d4fa5aece6..036532cf39aa5 100644
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -3382,12 +3382,14 @@ static int __init smc_init(void)
 	if (rc)
 		goto out_pernet_subsys;
 
-	smc_ism_init();
+	rc = smc_ism_init();
+	if (rc)
+		goto out_pernet_subsys_stat;
 	smc_clc_init();
 
 	rc = smc_nl_init();
 	if (rc)
-		goto out_pernet_subsys_stat;
+		goto out_ism;
 
 	rc = smc_pnet_init();
 	if (rc)
@@ -3480,6 +3482,8 @@ static int __init smc_init(void)
 	smc_pnet_exit();
 out_nl:
 	smc_nl_exit();
+out_ism:
+	smc_ism_exit();
 out_pernet_subsys_stat:
 	unregister_pernet_subsys(&smc_net_stat_ops);
 out_pernet_subsys:
@@ -3495,6 +3499,7 @@ static void __exit smc_exit(void)
 	sock_unregister(PF_SMC);
 	smc_core_exit();
 	smc_ib_unregister_client();
+	smc_ism_exit();
 	destroy_workqueue(smc_close_wq);
 	destroy_workqueue(smc_tcp_ls_wq);
 	destroy_workqueue(smc_hs_wq);
diff --git a/net/smc/smc_clc.c b/net/smc/smc_clc.c
index dfb9797f7bc63..b9b8b07aa7023 100644
--- a/net/smc/smc_clc.c
+++ b/net/smc/smc_clc.c
@@ -813,6 +813,7 @@ int smc_clc_send_proposal(struct smc_sock *smc, struct smc_init_info *ini)
 	struct smc_clc_v2_extension *v2_ext;
 	struct smc_clc_msg_smcd *pclc_smcd;
 	struct smc_clc_msg_trail *trl;
+	struct smcd_dev *smcd;
 	int len, i, plen, rc;
 	int reason_code = 0;
 	struct kvec vec[8];
@@ -868,7 +869,9 @@ int smc_clc_send_proposal(struct smc_sock *smc, struct smc_init_info *ini)
 	if (smcd_indicated(ini->smc_type_v1)) {
 		/* add SMC-D specifics */
 		if (ini->ism_dev[0]) {
-			pclc_smcd->ism.gid = htonll(ini->ism_dev[0]->local_gid);
+			smcd = ini->ism_dev[0];
+			pclc_smcd->ism.gid =
+				htonll(smcd->ops->get_local_gid(smcd));
 			pclc_smcd->ism.chid =
 				htons(smc_ism_get_chid(ini->ism_dev[0]));
 		}
@@ -914,8 +917,9 @@ int smc_clc_send_proposal(struct smc_sock *smc, struct smc_init_info *ini)
 		plen += sizeof(*smcd_v2_ext);
 		if (ini->ism_offered_cnt) {
 			for (i = 1; i <= ini->ism_offered_cnt; i++) {
+				smcd = ini->ism_dev[i];
 				gidchids[i - 1].gid =
-					htonll(ini->ism_dev[i]->local_gid);
+					htonll(smcd->ops->get_local_gid(smcd));
 				gidchids[i - 1].chid =
 					htons(smc_ism_get_chid(ini->ism_dev[i]));
 			}
@@ -1000,7 +1004,8 @@ static int smc_clc_send_confirm_accept(struct smc_sock *smc,
 		memcpy(clc->hdr.eyecatcher, SMCD_EYECATCHER,
 		       sizeof(SMCD_EYECATCHER));
 		clc->hdr.typev1 = SMC_TYPE_D;
-		clc->d0.gid = conn->lgr->smcd->local_gid;
+		clc->d0.gid =
+			conn->lgr->smcd->ops->get_local_gid(conn->lgr->smcd);
 		clc->d0.token = conn->rmb_desc->token;
 		clc->d0.dmbe_size = conn->rmbe_size_short;
 		clc->d0.dmbe_idx = 0;
diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c
index c305d8dd23f80..7642b16c41d19 100644
--- a/net/smc/smc_core.c
+++ b/net/smc/smc_core.c
@@ -500,6 +500,7 @@ static int smc_nl_fill_smcd_lgr(struct smc_link_group *lgr,
 				struct netlink_callback *cb)
 {
 	char smc_pnet[SMC_MAX_PNETID_LEN + 1];
+	struct smcd_dev *smcd = lgr->smcd;
 	struct nlattr *attrs;
 	void *nlh;
 
@@ -515,8 +516,9 @@ static int smc_nl_fill_smcd_lgr(struct smc_link_group *lgr,
 
 	if (nla_put_u32(skb, SMC_NLA_LGR_D_ID, *((u32 *)&lgr->id)))
 		goto errattr;
-	if (nla_put_u64_64bit(skb, SMC_NLA_LGR_D_GID, lgr->smcd->local_gid,
-			      SMC_NLA_LGR_D_PAD))
+	if (nla_put_u64_64bit(skb, SMC_NLA_LGR_D_GID,
+			      smcd->ops->get_local_gid(smcd),
+				  SMC_NLA_LGR_D_PAD))
 		goto errattr;
 	if (nla_put_u64_64bit(skb, SMC_NLA_LGR_D_PEER_GID, lgr->peer_gid,
 			      SMC_NLA_LGR_D_PAD))
@@ -820,6 +822,7 @@ static int smc_lgr_create(struct smc_sock *smc, struct smc_init_info *ini)
 {
 	struct smc_link_group *lgr;
 	struct list_head *lgr_list;
+	struct smcd_dev *smcd;
 	struct smc_link *lnk;
 	spinlock_t *lgr_lock;
 	u8 link_idx;
@@ -866,7 +869,8 @@ static int smc_lgr_create(struct smc_sock *smc, struct smc_init_info *ini)
 	lgr->conns_all = RB_ROOT;
 	if (ini->is_smcd) {
 		/* SMC-D specific settings */
-		get_device(&ini->ism_dev[ini->ism_selected]->dev);
+		smcd = ini->ism_dev[ini->ism_selected];
+		get_device(smcd->ops->get_dev(smcd));
 		lgr->peer_gid = ini->ism_peer_gid[ini->ism_selected];
 		lgr->smcd = ini->ism_dev[ini->ism_selected];
 		lgr_list = &ini->ism_dev[ini->ism_selected]->lgr_list;
@@ -1385,7 +1389,7 @@ static void smc_lgr_free(struct smc_link_group *lgr)
 	destroy_workqueue(lgr->tx_wq);
 	if (lgr->is_smcd) {
 		smc_ism_put_vlan(lgr->smcd, lgr->vlan_id);
-		put_device(&lgr->smcd->dev);
+		put_device(lgr->smcd->ops->get_dev(lgr->smcd));
 	}
 	smc_lgr_put(lgr); /* theoretically last lgr_put */
 }
@@ -2595,6 +2599,7 @@ static int smc_core_reboot_event(struct notifier_block *this,
 {
 	smc_lgrs_shutdown();
 	smc_ib_unregister_client();
+	smc_ism_exit();
 	return 0;
 }
 
diff --git a/net/smc/smc_diag.c b/net/smc/smc_diag.c
index 80ea7d954eceb..7ff2152971a5b 100644
--- a/net/smc/smc_diag.c
+++ b/net/smc/smc_diag.c
@@ -167,12 +167,13 @@ static int __smc_diag_dump(struct sock *sk, struct sk_buff *skb,
 	    !list_empty(&smc->conn.lgr->list)) {
 		struct smc_connection *conn = &smc->conn;
 		struct smcd_diag_dmbinfo dinfo;
+		struct smcd_dev *smcd = conn->lgr->smcd;
 
 		memset(&dinfo, 0, sizeof(dinfo));
 
 		dinfo.linkid = *((u32 *)conn->lgr->id);
 		dinfo.peer_gid = conn->lgr->peer_gid;
-		dinfo.my_gid = conn->lgr->smcd->local_gid;
+		dinfo.my_gid = smcd->ops->get_local_gid(smcd);
 		dinfo.token = conn->rmb_desc->token;
 		dinfo.peer_token = conn->peer_token;
 
diff --git a/net/smc/smc_ism.c b/net/smc/smc_ism.c
index 911fe08bc54be..3b0b7710c6b0f 100644
--- a/net/smc/smc_ism.c
+++ b/net/smc/smc_ism.c
@@ -17,6 +17,7 @@
 #include "smc_ism.h"
 #include "smc_pnet.h"
 #include "smc_netlink.h"
+#include "linux/ism.h"
 
 struct smcd_dev_list smcd_dev_list = {
 	.list = LIST_HEAD_INIT(smcd_dev_list.list),
@@ -26,6 +27,22 @@ struct smcd_dev_list smcd_dev_list = {
 static bool smc_ism_v2_capable;
 static u8 smc_ism_v2_system_eid[SMC_MAX_EID_LEN];
 
+#if IS_ENABLED(CONFIG_ISM)
+static void smcd_register_dev(struct ism_dev *ism);
+static void smcd_unregister_dev(struct ism_dev *ism);
+static void smcd_handle_event(struct ism_dev *ism, struct ism_event *event);
+static void smcd_handle_irq(struct ism_dev *ism, unsigned int dmbno,
+			    u16 dmbemask);
+
+static struct ism_client smc_ism_client = {
+	.name = "SMC-D",
+	.add = smcd_register_dev,
+	.remove = smcd_unregister_dev,
+	.handle_event = smcd_handle_event,
+	.handle_irq = smcd_handle_irq,
+};
+#endif
+
 /* Test if an ISM communication is possible - same CPC */
 int smc_ism_cantalk(u64 peer_gid, unsigned short vlan_id, struct smcd_dev *smcd)
 {
@@ -183,6 +200,7 @@ int smc_ism_unregister_dmb(struct smcd_dev *smcd, struct smc_buf_desc *dmb_desc)
 int smc_ism_register_dmb(struct smc_link_group *lgr, int dmb_len,
 			 struct smc_buf_desc *dmb_desc)
 {
+#if IS_ENABLED(CONFIG_ISM)
 	struct smcd_dmb dmb;
 	int rc;
 
@@ -191,7 +209,7 @@ int smc_ism_register_dmb(struct smc_link_group *lgr, int dmb_len,
 	dmb.sba_idx = dmb_desc->sba_idx;
 	dmb.vlan_id = lgr->vlan_id;
 	dmb.rgid = lgr->peer_gid;
-	rc = lgr->smcd->ops->register_dmb(lgr->smcd, &dmb);
+	rc = lgr->smcd->ops->register_dmb(lgr->smcd, &dmb, &smc_ism_client);
 	if (!rc) {
 		dmb_desc->sba_idx = dmb.sba_idx;
 		dmb_desc->token = dmb.dmb_tok;
@@ -200,6 +218,9 @@ int smc_ism_register_dmb(struct smc_link_group *lgr, int dmb_len,
 		dmb_desc->len = dmb.dmb_len;
 	}
 	return rc;
+#else
+	return 0;
+#endif
 }
 
 static int smc_nl_handle_smcd_dev(struct smcd_dev *smcd,
@@ -210,9 +231,11 @@ static int smc_nl_handle_smcd_dev(struct smcd_dev *smcd,
 	struct smc_pci_dev smc_pci_dev;
 	struct nlattr *port_attrs;
 	struct nlattr *attrs;
+	struct ism_dev *ism;
 	int use_cnt = 0;
 	void *nlh;
 
+	ism = smcd->priv;
 	nlh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
 			  &smc_gen_nl_family, NLM_F_MULTI,
 			  SMC_NETLINK_GET_DEV_SMCD);
@@ -227,7 +250,7 @@ static int smc_nl_handle_smcd_dev(struct smcd_dev *smcd,
 	if (nla_put_u8(skb, SMC_NLA_DEV_IS_CRIT, use_cnt > 0))
 		goto errattr;
 	memset(&smc_pci_dev, 0, sizeof(smc_pci_dev));
-	smc_set_pci_values(to_pci_dev(smcd->dev.parent), &smc_pci_dev);
+	smc_set_pci_values(to_pci_dev(ism->dev.parent), &smc_pci_dev);
 	if (nla_put_u32(skb, SMC_NLA_DEV_PCI_FID, smc_pci_dev.pci_fid))
 		goto errattr;
 	if (nla_put_u16(skb, SMC_NLA_DEV_PCI_CHID, smc_pci_dev.pci_pchid))
@@ -293,10 +316,11 @@ int smcd_nl_get_device(struct sk_buff *skb, struct netlink_callback *cb)
 	return skb->len;
 }
 
+#if IS_ENABLED(CONFIG_ISM)
 struct smc_ism_event_work {
 	struct work_struct work;
 	struct smcd_dev *smcd;
-	struct smcd_event event;
+	struct ism_event event;
 };
 
 #define ISM_EVENT_REQUEST		0x0001
@@ -336,24 +360,6 @@ static void smcd_handle_sw_event(struct smc_ism_event_work *wrk)
 	}
 }
 
-int smc_ism_signal_shutdown(struct smc_link_group *lgr)
-{
-	int rc;
-	union smcd_sw_event_info ev_info;
-
-	if (lgr->peer_shutdown)
-		return 0;
-
-	memcpy(ev_info.uid, lgr->id, SMC_LGR_ID_SIZE);
-	ev_info.vlan_id = lgr->vlan_id;
-	ev_info.code = ISM_EVENT_REQUEST;
-	rc = lgr->smcd->ops->signal_event(lgr->smcd, lgr->peer_gid,
-					  ISM_EVENT_REQUEST_IR,
-					  ISM_EVENT_CODE_SHUTDOWN,
-					  ev_info.info);
-	return rc;
-}
-
 /* worker for SMC-D events */
 static void smc_ism_event_work(struct work_struct *work)
 {
@@ -373,44 +379,25 @@ static void smc_ism_event_work(struct work_struct *work)
 	kfree(wrk);
 }
 
-static void smcd_release(struct device *dev)
-{
-	struct smcd_dev *smcd = container_of(dev, struct smcd_dev, dev);
-
-	kfree(smcd->conn);
-	kfree(smcd);
-}
-
-struct smcd_dev *smcd_alloc_dev(struct device *parent, const char *name,
-				const struct smcd_ops *ops, int max_dmbs)
+static struct smcd_dev *smcd_alloc_dev(struct device *parent, const char *name,
+				       const struct smcd_ops *ops, int max_dmbs)
 {
 	struct smcd_dev *smcd;
 
-	smcd = kzalloc(sizeof(*smcd), GFP_KERNEL);
+	smcd = devm_kzalloc(parent, sizeof(*smcd), GFP_KERNEL);
 	if (!smcd)
 		return NULL;
-	smcd->conn = kcalloc(max_dmbs, sizeof(struct smc_connection *),
-			     GFP_KERNEL);
-	if (!smcd->conn) {
-		kfree(smcd);
+	smcd->conn = devm_kcalloc(parent, max_dmbs,
+				  sizeof(struct smc_connection *), GFP_KERNEL);
+	if (!smcd->conn)
 		return NULL;
-	}
 
 	smcd->event_wq = alloc_ordered_workqueue("ism_evt_wq-%s)",
 						 WQ_MEM_RECLAIM, name);
-	if (!smcd->event_wq) {
-		kfree(smcd->conn);
-		kfree(smcd);
+	if (!smcd->event_wq)
 		return NULL;
-	}
 
-	smcd->dev.parent = parent;
-	smcd->dev.release = smcd_release;
-	device_initialize(&smcd->dev);
-	dev_set_name(&smcd->dev, name);
 	smcd->ops = ops;
-	if (smc_pnetid_by_dev_port(parent, 0, smcd->pnetid))
-		smc_pnetid_by_table_smcd(smcd);
 
 	spin_lock_init(&smcd->lock);
 	spin_lock_init(&smcd->lgr_lock);
@@ -419,11 +406,23 @@ struct smcd_dev *smcd_alloc_dev(struct device *parent, const char *name,
 	init_waitqueue_head(&smcd->lgrs_deleted);
 	return smcd;
 }
-EXPORT_SYMBOL_GPL(smcd_alloc_dev);
 
-int smcd_register_dev(struct smcd_dev *smcd)
+static void smcd_register_dev(struct ism_dev *ism)
 {
-	int rc;
+	const struct smcd_ops *ops = ism_get_smcd_ops();
+	struct smcd_dev *smcd;
+
+	if (!ops)
+		return;
+
+	smcd = smcd_alloc_dev(&ism->pdev->dev, dev_name(&ism->pdev->dev), ops,
+			      ISM_NR_DMBS);
+	if (!smcd)
+		return;
+	smcd->priv = ism;
+	ism_set_priv(ism, &smc_ism_client, smcd);
+	if (smc_pnetid_by_dev_port(&ism->pdev->dev, 0, smcd->pnetid))
+		smc_pnetid_by_table_smcd(smcd);
 
 	mutex_lock(&smcd_dev_list.mutex);
 	if (list_empty(&smcd_dev_list.list)) {
@@ -444,43 +443,28 @@ int smcd_register_dev(struct smcd_dev *smcd)
 	mutex_unlock(&smcd_dev_list.mutex);
 
 	pr_warn_ratelimited("smc: adding smcd device %s with pnetid %.16s%s\n",
-			    dev_name(&smcd->dev), smcd->pnetid,
+			    dev_name(&ism->dev), smcd->pnetid,
 			    smcd->pnetid_by_user ? " (user defined)" : "");
 
-	rc = device_add(&smcd->dev);
-	if (rc) {
-		mutex_lock(&smcd_dev_list.mutex);
-		list_del(&smcd->list);
-		mutex_unlock(&smcd_dev_list.mutex);
-	}
-
-	return rc;
+	return;
 }
-EXPORT_SYMBOL_GPL(smcd_register_dev);
 
-void smcd_unregister_dev(struct smcd_dev *smcd)
+static void smcd_unregister_dev(struct ism_dev *ism)
 {
+	struct smcd_dev *smcd = ism_get_priv(ism, &smc_ism_client);
+
 	pr_warn_ratelimited("smc: removing smcd device %s\n",
-			    dev_name(&smcd->dev));
+			    dev_name(&ism->dev));
+	smcd->going_away = 1;
+	smc_smcd_terminate_all(smcd);
 	mutex_lock(&smcd_dev_list.mutex);
 	list_del_init(&smcd->list);
 	mutex_unlock(&smcd_dev_list.mutex);
-	smcd->going_away = 1;
-	smc_smcd_terminate_all(smcd);
 	destroy_workqueue(smcd->event_wq);
-
-	device_del(&smcd->dev);
-}
-EXPORT_SYMBOL_GPL(smcd_unregister_dev);
-
-void smcd_free_dev(struct smcd_dev *smcd)
-{
-	put_device(&smcd->dev);
 }
-EXPORT_SYMBOL_GPL(smcd_free_dev);
 
 /* SMCD Device event handler. Called from ISM device interrupt handler.
- * Parameters are smcd device pointer,
+ * Parameters are ism device pointer,
  * - event->type (0 --> DMB, 1 --> GID),
  * - event->code (event code),
  * - event->tok (either DMB token when event type 0, or GID when event type 1)
@@ -490,8 +474,9 @@ EXPORT_SYMBOL_GPL(smcd_free_dev);
  * Context:
  * - Function called in IRQ context from ISM device driver event handler.
  */
-void smcd_handle_event(struct smcd_dev *smcd, struct smcd_event *event)
+static void smcd_handle_event(struct ism_dev *ism, struct ism_event *event)
 {
+	struct smcd_dev *smcd = ism_get_priv(ism, &smc_ism_client);
 	struct smc_ism_event_work *wrk;
 
 	if (smcd->going_away)
@@ -505,17 +490,18 @@ void smcd_handle_event(struct smcd_dev *smcd, struct smcd_event *event)
 	wrk->event = *event;
 	queue_work(smcd->event_wq, &wrk->work);
 }
-EXPORT_SYMBOL_GPL(smcd_handle_event);
 
 /* SMCD Device interrupt handler. Called from ISM device interrupt handler.
- * Parameters are smcd device pointer, DMB number, and the DMBE bitmask.
+ * Parameters are the ism device pointer, DMB number, and the DMBE bitmask.
  * Find the connection and schedule the tasklet for this connection.
  *
  * Context:
  * - Function called in IRQ context from ISM device driver IRQ handler.
  */
-void smcd_handle_irq(struct smcd_dev *smcd, unsigned int dmbno, u16 dmbemask)
+static void smcd_handle_irq(struct ism_dev *ism, unsigned int dmbno,
+			    u16 dmbemask)
 {
+	struct smcd_dev *smcd = ism_get_priv(ism, &smc_ism_client);
 	struct smc_connection *conn = NULL;
 	unsigned long flags;
 
@@ -525,10 +511,44 @@ void smcd_handle_irq(struct smcd_dev *smcd, unsigned int dmbno, u16 dmbemask)
 		tasklet_schedule(&conn->rx_tsklet);
 	spin_unlock_irqrestore(&smcd->lock, flags);
 }
-EXPORT_SYMBOL_GPL(smcd_handle_irq);
+#endif
+
+int smc_ism_signal_shutdown(struct smc_link_group *lgr)
+{
+	int rc = 0;
+#if IS_ENABLED(CONFIG_ISM)
+	union smcd_sw_event_info ev_info;
+
+	if (lgr->peer_shutdown)
+		return 0;
+
+	memcpy(ev_info.uid, lgr->id, SMC_LGR_ID_SIZE);
+	ev_info.vlan_id = lgr->vlan_id;
+	ev_info.code = ISM_EVENT_REQUEST;
+	rc = lgr->smcd->ops->signal_event(lgr->smcd, lgr->peer_gid,
+					  ISM_EVENT_REQUEST_IR,
+					  ISM_EVENT_CODE_SHUTDOWN,
+					  ev_info.info);
+#endif
+	return rc;
+}
 
-void __init smc_ism_init(void)
+int smc_ism_init(void)
 {
+	int rc = 0;
+
+#if IS_ENABLED(CONFIG_ISM)
 	smc_ism_v2_capable = false;
 	memset(smc_ism_v2_system_eid, 0, SMC_MAX_EID_LEN);
+
+	rc = ism_register_client(&smc_ism_client);
+#endif
+	return rc;
+}
+
+void smc_ism_exit(void)
+{
+#if IS_ENABLED(CONFIG_ISM)
+	ism_unregister_client(&smc_ism_client);
+#endif
 }
diff --git a/net/smc/smc_ism.h b/net/smc/smc_ism.h
index d6b2db604fe8f..832b2f42d79f3 100644
--- a/net/smc/smc_ism.h
+++ b/net/smc/smc_ism.h
@@ -42,7 +42,8 @@ int smc_ism_signal_shutdown(struct smc_link_group *lgr);
 void smc_ism_get_system_eid(u8 **eid);
 u16 smc_ism_get_chid(struct smcd_dev *dev);
 bool smc_ism_is_v2_capable(void);
-void smc_ism_init(void);
+int smc_ism_init(void);
+void smc_ism_exit(void);
 int smcd_nl_get_device(struct sk_buff *skb, struct netlink_callback *cb);
 
 static inline int smc_ism_write(struct smcd_dev *smcd, u64 dmb_tok,
diff --git a/net/smc/smc_pnet.c b/net/smc/smc_pnet.c
index 25fb2fd186e22..11775401df689 100644
--- a/net/smc/smc_pnet.c
+++ b/net/smc/smc_pnet.c
@@ -103,7 +103,7 @@ static int smc_pnet_remove_by_pnetid(struct net *net, char *pnet_name)
 	struct smc_pnetentry *pnetelem, *tmp_pe;
 	struct smc_pnettable *pnettable;
 	struct smc_ib_device *ibdev;
-	struct smcd_dev *smcd_dev;
+	struct smcd_dev *smcd;
 	struct smc_net *sn;
 	int rc = -ENOENT;
 	int ibport;
@@ -162,16 +162,17 @@ static int smc_pnet_remove_by_pnetid(struct net *net, char *pnet_name)
 	mutex_unlock(&smc_ib_devices.mutex);
 	/* remove smcd devices */
 	mutex_lock(&smcd_dev_list.mutex);
-	list_for_each_entry(smcd_dev, &smcd_dev_list.list, list) {
-		if (smcd_dev->pnetid_by_user &&
+	list_for_each_entry(smcd, &smcd_dev_list.list, list) {
+		if (smcd->pnetid_by_user &&
 		    (!pnet_name ||
-		     smc_pnet_match(pnet_name, smcd_dev->pnetid))) {
+		     smc_pnet_match(pnet_name, smcd->pnetid))) {
 			pr_warn_ratelimited("smc: smcd device %s "
 					    "erased user defined pnetid "
-					    "%.16s\n", dev_name(&smcd_dev->dev),
-					    smcd_dev->pnetid);
-			memset(smcd_dev->pnetid, 0, SMC_MAX_PNETID_LEN);
-			smcd_dev->pnetid_by_user = false;
+					    "%.16s\n",
+					    dev_name(smcd->ops->get_dev(smcd)),
+					    smcd->pnetid);
+			memset(smcd->pnetid, 0, SMC_MAX_PNETID_LEN);
+			smcd->pnetid_by_user = false;
 			rc = 0;
 		}
 	}
@@ -331,8 +332,8 @@ static struct smcd_dev *smc_pnet_find_smcd(char *smcd_name)
 
 	mutex_lock(&smcd_dev_list.mutex);
 	list_for_each_entry(smcd_dev, &smcd_dev_list.list, list) {
-		if (!strncmp(dev_name(&smcd_dev->dev), smcd_name,
-			     IB_DEVICE_NAME_MAX - 1))
+		if (!strncmp(dev_name(smcd_dev->ops->get_dev(smcd_dev)),
+			     smcd_name, IB_DEVICE_NAME_MAX - 1))
 			goto out;
 	}
 	smcd_dev = NULL;
@@ -411,7 +412,8 @@ static int smc_pnet_add_ib(struct smc_pnettable *pnettable, char *ib_name,
 	struct smc_ib_device *ib_dev;
 	bool smcddev_applied = true;
 	bool ibdev_applied = true;
-	struct smcd_dev *smcd_dev;
+	struct smcd_dev *smcd;
+	struct device *dev;
 	bool new_ibdev;
 
 	/* try to apply the pnetid to active devices */
@@ -425,14 +427,16 @@ static int smc_pnet_add_ib(struct smc_pnettable *pnettable, char *ib_name,
 					    ib_port,
 					    ib_dev->pnetid[ib_port - 1]);
 	}
-	smcd_dev = smc_pnet_find_smcd(ib_name);
-	if (smcd_dev) {
-		smcddev_applied = smc_pnet_apply_smcd(smcd_dev, pnet_name);
-		if (smcddev_applied)
+	smcd = smc_pnet_find_smcd(ib_name);
+	if (smcd) {
+		smcddev_applied = smc_pnet_apply_smcd(smcd, pnet_name);
+		if (smcddev_applied) {
+			dev = smcd->ops->get_dev(smcd);
 			pr_warn_ratelimited("smc: smcd device %s "
 					    "applied user defined pnetid "
-					    "%.16s\n", dev_name(&smcd_dev->dev),
-					    smcd_dev->pnetid);
+					    "%.16s\n", dev_name(dev),
+					    smcd->pnetid);
+		}
 	}
 	/* Apply fails when a device has a hardware-defined pnetid set, do not
 	 * add a pnet table entry in that case.
@@ -1181,7 +1185,7 @@ int smc_pnetid_by_table_ib(struct smc_ib_device *smcibdev, u8 ib_port)
  */
 int smc_pnetid_by_table_smcd(struct smcd_dev *smcddev)
 {
-	const char *ib_name = dev_name(&smcddev->dev);
+	const char *ib_name = dev_name(smcddev->ops->get_dev(smcddev));
 	struct smc_pnettable *pnettable;
 	struct smc_pnetentry *tmp_pe;
 	struct smc_net *sn;