From: Yonatan Nachum Date: Sun, 19 Feb 2023 08:13:28 +0000 (+0000) Subject: RDMA/efa: Add data polling capability feature bit X-Git-Tag: v6.6.7~2942^2~61 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6dddd93938b3651cfeba7158ac179b4e6d3c1553;p=platform%2Fkernel%2Flinux-starfive.git 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 Reviewed-by: Yossi Leybovich Signed-off-by: Yonatan Nachum Signed-off-by: Michael Margolin Acked-by: Gal Pressman Signed-off-by: Jason Gunthorpe --- diff --git a/drivers/infiniband/hw/efa/efa_admin_cmds_defs.h b/drivers/infiniband/hw/efa/efa_admin_cmds_defs.h index d4b9226..3db791e 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 3145464..c20136e 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 @@ -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; diff --git a/include/uapi/rdma/efa-abi.h b/include/uapi/rdma/efa-abi.h index 163ac79..74406b4 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 {