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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 /drivers/infiniband/hw/efa | |
| 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 'drivers/infiniband/hw/efa')
| -rw-r--r-- | drivers/infiniband/hw/efa/efa_admin_cmds_defs.h | 7 | ||||
| -rw-r--r-- | drivers/infiniband/hw/efa/efa_verbs.c | 5 |
2 files changed, 9 insertions, 3 deletions
diff --git a/drivers/infiniband/hw/efa/efa_admin_cmds_defs.h b/drivers/infiniband/hw/efa/efa_admin_cmds_defs.h index d4b9226088bd..3db791e6c030 100644 --- a/drivers/infiniband/hw/efa/efa_admin_cmds_defs.h +++ b/drivers/infiniband/hw/efa/efa_admin_cmds_defs.h @@ -1,6 +1,6 @@ /* SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause */ /* - * Copyright 2018-2021 Amazon.com, Inc. or its affiliates. All rights reserved. + * Copyright 2018-2023 Amazon.com, Inc. or its affiliates. All rights reserved. */ #ifndef _EFA_ADMIN_CMDS_H_ @@ -618,7 +618,9 @@ struct efa_admin_feature_device_attr_desc { * TX queues * 1 : rnr_retry - If set, RNR retry is supported on * modify QP command - * 31:2 : reserved - MBZ + * 2 : data_polling_128 - If set, 128 bytes data + * polling is supported + * 31:3 : reserved - MBZ */ u32 device_caps; @@ -991,6 +993,7 @@ struct efa_admin_host_info { /* feature_device_attr_desc */ #define EFA_ADMIN_FEATURE_DEVICE_ATTR_DESC_RDMA_READ_MASK BIT(0) #define EFA_ADMIN_FEATURE_DEVICE_ATTR_DESC_RNR_RETRY_MASK BIT(1) +#define EFA_ADMIN_FEATURE_DEVICE_ATTR_DESC_DATA_POLLING_128_MASK BIT(2) /* create_eq_cmd */ #define EFA_ADMIN_CREATE_EQ_CMD_ENTRY_SIZE_WORDS_MASK GENMASK(4, 0) diff --git a/drivers/infiniband/hw/efa/efa_verbs.c b/drivers/infiniband/hw/efa/efa_verbs.c index 31454643f8c5..c20136e9d3d1 100644 --- a/drivers/infiniband/hw/efa/efa_verbs.c +++ b/drivers/infiniband/hw/efa/efa_verbs.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB /* - * Copyright 2018-2022 Amazon.com, Inc. or its affiliates. All rights reserved. + * Copyright 2018-2023 Amazon.com, Inc. or its affiliates. All rights reserved. */ #include <linux/dma-buf.h> @@ -250,6 +250,9 @@ int efa_query_device(struct ib_device *ibdev, if (EFA_DEV_CAP(dev, RNR_RETRY)) resp.device_caps |= EFA_QUERY_DEVICE_CAPS_RNR_RETRY; + if (EFA_DEV_CAP(dev, DATA_POLLING_128)) + resp.device_caps |= EFA_QUERY_DEVICE_CAPS_DATA_POLLING_128; + if (dev->neqs) resp.device_caps |= EFA_QUERY_DEVICE_CAPS_CQ_NOTIFICATIONS; |