[for-next PATCH 01/10] RDMA: Extend RDMA user ABI to support flush

[Li Zhijian]

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

Reviewed-by: Zhu Yanjun <zyjzyj2000@xxxxxxxxx>
Signed-off-by: Li Zhijian <lizhijian@xxxxxxxxxxx>
---
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       | 17 +++++++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/include/uapi/rdma/ib_user_ioctl_verbs.h b/include/uapi/rdma/ib_user_ioctl_verbs.h
index e0c25537fd2e..d7c5aaa32744 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 237814815544..e16650f0c85d 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,
 	IB_UVERBS_WC_ATOMIC_WRITE = 9,
 };
 
@@ -785,6 +798,7 @@ 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,
 	IB_UVERBS_WR_ATOMIC_WRITE = 15,
 	/* Review enum ib_wr_opcode before modifying this */
 };
@@ -1333,6 +1347,9 @@ 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,
+	/* Flush placement types */
+	IB_UVERBS_DEVICE_FLUSH_GLOBAL = 1ULL << 38,
+	IB_UVERBS_DEVICE_FLUSH_PERSISTENT = 1ULL << 39,
 	/* Atomic write attributes */
 	IB_UVERBS_DEVICE_ATOMIC_WRITE = 1ULL << 40,
 };
-- 
2.31.1