v4.19.13 snapshot.
diff --git a/net/smc/smc_ib.h b/net/smc/smc_ib.h
new file mode 100644
index 0000000..bac7fd6
--- /dev/null
+++ b/net/smc/smc_ib.h
@@ -0,0 +1,81 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Shared Memory Communications over RDMA (SMC-R) and RoCE
+ *
+ * Definitions for IB environment
+ *
+ * Copyright IBM Corp. 2016
+ *
+ * Author(s): Ursula Braun <Ursula Braun@linux.vnet.ibm.com>
+ */
+
+#ifndef _SMC_IB_H
+#define _SMC_IB_H
+
+#include <linux/interrupt.h>
+#include <linux/if_ether.h>
+#include <rdma/ib_verbs.h>
+#include <net/smc.h>
+
+#define SMC_MAX_PORTS 2 /* Max # of ports */
+#define SMC_GID_SIZE sizeof(union ib_gid)
+
+#define SMC_IB_MAX_SEND_SGE 2
+
+struct smc_ib_devices { /* list of smc ib devices definition */
+ struct list_head list;
+ spinlock_t lock; /* protects list of smc ib devices */
+};
+
+extern struct smc_ib_devices smc_ib_devices; /* list of smc ib devices */
+
+struct smc_ib_device { /* ib-device infos for smc */
+ struct list_head list;
+ struct ib_device *ibdev;
+ struct ib_port_attr pattr[SMC_MAX_PORTS]; /* ib dev. port attrs */
+ struct ib_event_handler event_handler; /* global ib_event handler */
+ struct ib_cq *roce_cq_send; /* send completion queue */
+ struct ib_cq *roce_cq_recv; /* recv completion queue */
+ struct tasklet_struct send_tasklet; /* called by send cq handler */
+ struct tasklet_struct recv_tasklet; /* called by recv cq handler */
+ char mac[SMC_MAX_PORTS][ETH_ALEN];
+ /* mac address per port*/
+ u8 pnetid[SMC_MAX_PORTS][SMC_MAX_PNETID_LEN];
+ /* pnetid per port */
+ u8 initialized : 1; /* ib dev CQ, evthdl done */
+ struct work_struct port_event_work;
+ unsigned long port_event_mask;
+};
+
+struct smc_buf_desc;
+struct smc_link;
+
+int smc_ib_register_client(void) __init;
+void smc_ib_unregister_client(void);
+bool smc_ib_port_active(struct smc_ib_device *smcibdev, u8 ibport);
+int smc_ib_buf_map_sg(struct smc_ib_device *smcibdev,
+ struct smc_buf_desc *buf_slot,
+ enum dma_data_direction data_direction);
+void smc_ib_buf_unmap_sg(struct smc_ib_device *smcibdev,
+ struct smc_buf_desc *buf_slot,
+ enum dma_data_direction data_direction);
+void smc_ib_dealloc_protection_domain(struct smc_link *lnk);
+int smc_ib_create_protection_domain(struct smc_link *lnk);
+void smc_ib_destroy_queue_pair(struct smc_link *lnk);
+int smc_ib_create_queue_pair(struct smc_link *lnk);
+int smc_ib_ready_link(struct smc_link *lnk);
+int smc_ib_modify_qp_rts(struct smc_link *lnk);
+int smc_ib_modify_qp_reset(struct smc_link *lnk);
+long smc_ib_setup_per_ibdev(struct smc_ib_device *smcibdev);
+int smc_ib_get_memory_region(struct ib_pd *pd, int access_flags,
+ struct smc_buf_desc *buf_slot);
+void smc_ib_put_memory_region(struct ib_mr *mr);
+void smc_ib_sync_sg_for_cpu(struct smc_ib_device *smcibdev,
+ struct smc_buf_desc *buf_slot,
+ enum dma_data_direction data_direction);
+void smc_ib_sync_sg_for_device(struct smc_ib_device *smcibdev,
+ struct smc_buf_desc *buf_slot,
+ enum dma_data_direction data_direction);
+int smc_ib_determine_gid(struct smc_ib_device *smcibdev, u8 ibport,
+ unsigned short vlan_id, u8 gid[], u8 *sgid_index);
+#endif