4 files changed, 14 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/efa/efa_admin_cmds_defs.h b/drivers/infiniband/hw/efa/efa_admin_cmds_defs.h
index bef2bd291054..03e7388af06e 100644
--- a/drivers/infiniband/hw/efa/efa_admin_cmds_defs.h
+++ b/drivers/infiniband/hw/efa/efa_admin_cmds_defs.h
@@ -632,6 +632,17 @@ struct efa_admin_feature_queue_attr_desc {
 
 	/* Maximum number of SGEs for a single RDMA read WQE */
 	u16 max_wr_rdma_sges;
+
+	/*
+	 * Maximum number of bytes that can be written to SQ between two
+	 * consecutive doorbells (in units of 64B). Driver must ensure that only
+	 * complete WQEs are written to queue before issuing a doorbell.
+	 * Examples: max_tx_batch=16 and WQE size = 64B, means up to 16 WQEs can
+	 * be written to SQ between two consecutive doorbells. max_tx_batch=11
+	 * and WQE size = 128B, means up to 5 WQEs can be written to SQ between
+	 * two consecutive doorbells. Zero means unlimited.
+	 */
+	u16 max_tx_batch;
 };
 
 struct efa_admin_feature_aenq_desc {
diff --git a/drivers/infiniband/hw/efa/efa_com_cmd.c b/drivers/infiniband/hw/efa/efa_com_cmd.c
index fabd8df2e78f..53cfde5c43d8 100644
--- a/drivers/infiniband/hw/efa/efa_com_cmd.c
+++ b/drivers/infiniband/hw/efa/efa_com_cmd.c
@@ -480,6 +480,7 @@ int efa_com_get_device_attr(struct efa_com_dev *edev,
 	result->max_llq_size = resp.u.queue_attr.max_llq_size;
 	result->sub_cqs_per_cq = resp.u.queue_attr.sub_cqs_per_cq;
 	result->max_wr_rdma_sge = resp.u.queue_attr.max_wr_rdma_sges;
+	result->max_tx_batch = resp.u.queue_attr.max_tx_batch;
 
 	err = efa_com_get_feature(edev, &resp, EFA_ADMIN_NETWORK_ATTR);
 	if (err) {
diff --git a/drivers/infiniband/hw/efa/efa_com_cmd.h b/drivers/infiniband/hw/efa/efa_com_cmd.h
index 41ce4a476ee6..8df2a26d57d4 100644
--- a/drivers/infiniband/hw/efa/efa_com_cmd.h
+++ b/drivers/infiniband/hw/efa/efa_com_cmd.h
@@ -127,6 +127,7 @@ struct efa_com_get_device_attr_result {
 	u16 max_sq_sge;
 	u16 max_rq_sge;
 	u16 max_wr_rdma_sge;
+	u16 max_tx_batch;
 	u8 db_bar;
 };
 
diff --git a/drivers/infiniband/hw/efa/efa_verbs.c b/drivers/infiniband/hw/efa/efa_verbs.c
index 08313f7c73bc..f49d14cebe4a 100644
--- a/drivers/infiniband/hw/efa/efa_verbs.c
+++ b/drivers/infiniband/hw/efa/efa_verbs.c
@@ -1525,6 +1525,7 @@ int efa_alloc_ucontext(struct ib_ucontext *ibucontext, struct ib_udata *udata)
 	resp.sub_cqs_per_cq = dev->dev_attr.sub_cqs_per_cq;
 	resp.inline_buf_size = dev->dev_attr.inline_buf_size;
 	resp.max_llq_size = dev->dev_attr.max_llq_size;
+	resp.max_tx_batch = dev->dev_attr.max_tx_batch;
 
 	if (udata && udata->outlen) {
 		err = ib_copy_to_udata(udata, &resp,