linux-kernel - [for-next PATCH v5 02/11] RDMA: Extend RDMA user ABI to support flush

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Date:   Tue, 27 Sep 2022 13:53:28 +0800
From:   Li Zhijian <lizhijian@...itsu.com>
To:     Bob Pearson <rpearsonhpe@...il.com>,
        Leon Romanovsky <leon@...nel.org>,
        Jason Gunthorpe <jgg@...pe.ca>, linux-rdma@...r.kernel.org
Cc:     Zhu Yanjun <zyjzyj2000@...il.com>, yangx.jy@...itsu.com,
        y-goto@...itsu.com, mbloch@...dia.com, liangwenpeng@...wei.com,
        tom@...pey.com, tomasz.gromadzki@...el.com,
        dan.j.williams@...el.com, linux-kernel@...r.kernel.org,
        Li Zhijian <lizhijian@...itsu.com>
Subject: [for-next PATCH v5 02/11] RDMA: Extend RDMA user ABI to support flush

This commit extends the RDMA user ABI to support the flush
operation defined in IBA A19.4.1. These changes are
backwards compatible with the existing RDMA user ABI.

Signed-off-by: Li Zhijian <lizhijian@...itsu.com>
---
V5: new names and new patch split scheme, suggested by Bob
---
 include/uapi/rdma/ib_user_ioctl_verbs.h |  2 ++
 include/uapi/rdma/ib_user_verbs.h       | 16 ++++++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/include/uapi/rdma/ib_user_ioctl_verbs.h b/include/uapi/rdma/ib_user_ioctl_verbs.h
index 7dd56210226f..07b105e22f6f 100644
--- a/include/uapi/rdma/ib_user_ioctl_verbs.h
+++ b/include/uapi/rdma/ib_user_ioctl_verbs.h
@@ -57,6 +57,8 @@ enum ib_uverbs_access_flags {
 	IB_UVERBS_ACCESS_ZERO_BASED = 1 << 5,
 	IB_UVERBS_ACCESS_ON_DEMAND = 1 << 6,
 	IB_UVERBS_ACCESS_HUGETLB = 1 << 7,
+	IB_UVERBS_ACCESS_FLUSH_GLOBAL = 1 << 8,
+	IB_UVERBS_ACCESS_FLUSH_PERSISTENT = 1 << 9,
 
 	IB_UVERBS_ACCESS_RELAXED_ORDERING = IB_UVERBS_ACCESS_OPTIONAL_FIRST,
 	IB_UVERBS_ACCESS_OPTIONAL_RANGE =
diff --git a/include/uapi/rdma/ib_user_verbs.h b/include/uapi/rdma/ib_user_verbs.h
index 43672cb1fd57..2d5f32d9d0d9 100644
--- a/include/uapi/rdma/ib_user_verbs.h
+++ b/include/uapi/rdma/ib_user_verbs.h
@@ -105,6 +105,18 @@ enum {
 	IB_USER_VERBS_EX_CMD_MODIFY_CQ
 };
 
+/* see IBA A19.4.1.1 Placement Types */
+enum ib_placement_type {
+	IB_FLUSH_GLOBAL = 1U << 0,
+	IB_FLUSH_PERSISTENT = 1U << 1,
+};
+
+/* see IBA A19.4.1.2 Selectivity Level */
+enum ib_selectivity_level {
+	IB_FLUSH_RANGE = 0,
+	IB_FLUSH_MR,
+};
+
 /*
  * Make sure that all structs defined in this file remain laid out so
  * that they pack the same way on 32-bit and 64-bit architectures (to
@@ -466,6 +478,7 @@ enum ib_uverbs_wc_opcode {
 	IB_UVERBS_WC_BIND_MW = 5,
 	IB_UVERBS_WC_LOCAL_INV = 6,
 	IB_UVERBS_WC_TSO = 7,
+	IB_UVERBS_WC_FLUSH = 8,
 };
 
 struct ib_uverbs_wc {
@@ -784,6 +797,7 @@ enum ib_uverbs_wr_opcode {
 	IB_UVERBS_WR_RDMA_READ_WITH_INV = 11,
 	IB_UVERBS_WR_MASKED_ATOMIC_CMP_AND_SWP = 12,
 	IB_UVERBS_WR_MASKED_ATOMIC_FETCH_AND_ADD = 13,
+	IB_UVERBS_WR_FLUSH = 14,
 	/* Review enum ib_wr_opcode before modifying this */
 };
 
@@ -1331,6 +1345,8 @@ enum ib_uverbs_device_cap_flags {
 	/* Deprecated. Please use IB_UVERBS_RAW_PACKET_CAP_SCATTER_FCS. */
 	IB_UVERBS_DEVICE_RAW_SCATTER_FCS = 1ULL << 34,
 	IB_UVERBS_DEVICE_PCI_WRITE_END_PADDING = 1ULL << 36,
+	IB_UVERBS_DEVICE_FLUSH_GLOBAL = 1ULL << 38,
+	IB_UVERBS_DEVICE_FLUSH_PERSISTENT = 1ULL << 39,
 };
 
 enum ib_uverbs_raw_packet_caps {
-- 
2.31.1