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
backward compatible with the existing RDMA user ABI.

Link: https://lore.kernel.org/r/20221206130201.30986-2-lizhijian@fujitsu.com
Reviewed-by: Zhu Yanjun <zyjzyj2000@gmail.com>
Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

diff --git a/include/uapi/rdma/ib_user_ioctl_verbs.h b/include/uapi/rdma/ib_user_ioctl_verbs.h
index e0c25537fd2e93a30e537f13c91f3ed58ea0778f..d7c5aaa3274453f2dac87d8ad4c32ba9a0f5b346 100644 (file)
--- 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 2378148155442ee3d3a0f715dd3788011e3a8999..e16650f0c85dd6223222afc027e9107067b500fc 100644 (file)
--- 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,
 };