diff options
| -rw-r--r-- | drivers/infiniband/hw/efa/efa_admin_cmds_defs.h | 11 | ||||
| -rw-r--r-- | drivers/infiniband/hw/efa/efa_com_cmd.c | 1 | ||||
| -rw-r--r-- | drivers/infiniband/hw/efa/efa_com_cmd.h | 1 | ||||
| -rw-r--r-- | drivers/infiniband/hw/efa/efa_verbs.c | 1 | ||||
| -rw-r--r-- | include/uapi/rdma/efa-abi.h | 4 |
5 files changed, 17 insertions, 1 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, diff --git a/include/uapi/rdma/efa-abi.h b/include/uapi/rdma/efa-abi.h index 53b6e2036a9b..10781763da37 100644 --- a/include/uapi/rdma/efa-abi.h +++ b/include/uapi/rdma/efa-abi.h @@ -1,6 +1,6 @@ /* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) */ /* - * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All rights reserved. + * Copyright 2018-2020 Amazon.com, Inc. or its affiliates. All rights reserved. */ #ifndef EFA_ABI_USER_H @@ -31,6 +31,8 @@ struct efa_ibv_alloc_ucontext_resp { __u16 sub_cqs_per_cq; __u16 inline_buf_size; __u32 max_llq_size; /* bytes */ + __u16 max_tx_batch; /* units of 64 bytes */ + __u8 reserved_90[6]; }; struct efa_ibv_alloc_pd_resp { |