RDMA/efa: Add support for node guid

Propagate the unique, per device, ID in the device attributes to the
standard node_guid value in IB device.

Link: https://patch.msgid.link/r/20240822171143.2800-1-mrgolin@amazon.comReviewed-by: Yonatan Nachum <ynachum@amazon.com>
Signed-off-by: Yehuda Yitschak <yehuday@amazon.com>
Signed-off-by: Michael Margolin <mrgolin@amazon.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/hw/efa/efa_admin_cmds_defs.h

@@ -674,6 +674,9 @@ struct efa_admin_feature_device_attr_desc {
 
 	/* Max RDMA transfer size in bytes */
 	u32 max_rdma_size;
+
+	/* Unique global ID for an EFA device */
+	u64 guid;
 };
 
 struct efa_admin_feature_queue_attr_desc {

drivers/infiniband/hw/efa/efa_com_cmd.c

@@ -465,6 +465,7 @@ int efa_com_get_device_attr(struct efa_com_dev *edev,
 	result->db_bar = resp.u.device_attr.db_bar;
 	result->max_rdma_size = resp.u.device_attr.max_rdma_size;
 	result->device_caps = resp.u.device_attr.device_caps;
+	result->guid = resp.u.device_attr.guid;
 
 	if (result->admin_api_version < 1) {
 		ibdev_err_ratelimited(

drivers/infiniband/hw/efa/efa_com_cmd.h

@@ -112,6 +112,7 @@ struct efa_com_get_device_attr_result {
 	u8 addr[EFA_GID_SIZE];
 	u64 page_size_cap;
 	u64 max_mr_pages;
+	u64 guid;
 	u32 mtu;
 	u32 fw_version;
 	u32 admin_api_version;

drivers/infiniband/hw/efa/efa_main.c

@@ -441,6 +441,7 @@ static int efa_ib_device_add(struct efa_dev *dev)
 	efa_set_host_info(dev);
 
 	dev->ibdev.node_type = RDMA_NODE_UNSPECIFIED;
+	dev->ibdev.node_guid = dev->dev_attr.guid;
 	dev->ibdev.phys_port_cnt = 1;
 	dev->ibdev.num_comp_vectors = dev->neqs ?: 1;
 	dev->ibdev.dev.parent = &pdev->dev;