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| author | Yonatan Nachum <ynachum@amazon.com> | 2023-02-19 08:13:28 +0000 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2023-03-22 14:41:58 -0300 |
| commit | 6dddd93938b3651cfeba7158ac179b4e6d3c1553 (patch) | |
| tree | 55c55a3880f15fbf743a23f92e3796a9c67c720e /include | |
| parent | 901d9d62416baec3979fd9d768249b8a9e8e56ee (diff) | |
| download | linux-6dddd93938b3651cfeba7158ac179b4e6d3c1553.tar.gz linux-6dddd93938b3651cfeba7158ac179b4e6d3c1553.tar.bz2 linux-6dddd93938b3651cfeba7158ac179b4e6d3c1553.zip | |
RDMA/efa: Add data polling capability feature bit
Add feature bit to existing device caps field. EFA supports data polling
of 128 bytes blocks.
The flag indicates that the NIC guarentees that a 128 byte aligned block
is written in order, ie that observing the last 8 bits of the block mean
the prior 127 bytes are also written.
It is useful for "last data polling" acceleration techniques.
Link: https://lore.kernel.org/r/20230219081328.10419-1-mrgolin@amazon.com
Reviewed-by: Yehuda Yitschak <yehuday@amazon.com>
Reviewed-by: Yossi Leybovich <sleybo@amazon.com>
Signed-off-by: Yonatan Nachum <ynachum@amazon.com>
Signed-off-by: Michael Margolin <mrgolin@amazon.com>
Acked-by: Gal Pressman <gal.pressman@linux.dev>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/rdma/efa-abi.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/uapi/rdma/efa-abi.h b/include/uapi/rdma/efa-abi.h index 163ac79556d6..74406b4817ce 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 2018-2022 Amazon.com, Inc. or its affiliates. All rights reserved. + * Copyright 2018-2023 Amazon.com, Inc. or its affiliates. All rights reserved. */ #ifndef EFA_ABI_USER_H @@ -120,6 +120,7 @@ enum { EFA_QUERY_DEVICE_CAPS_RNR_RETRY = 1 << 1, EFA_QUERY_DEVICE_CAPS_CQ_NOTIFICATIONS = 1 << 2, EFA_QUERY_DEVICE_CAPS_CQ_WITH_SGID = 1 << 3, + EFA_QUERY_DEVICE_CAPS_DATA_POLLING_128 = 1 << 4, }; struct efa_ibv_ex_query_device_resp { |