This patchset adds support for the following enhanced atomic operations: - Masked atomic compare and swap - Masked atomic fetch and add
These operations enable using a smaller amount of memory when using multiple locks by using portions of a 64 bit value in an atomic operation. - Add new IB_WR_ATOMIC_MASKED_CMP_AND_SWP and IB_WR_ATOMIC_MASKED_FETCH_AND_ADD send opcodes that can be used to mark a "masked atomic compare and swap" and "masked atomic fetch and add" work request correspondingly. - Add IB_DEVICE_MASKED_ATOMIC capability bit. - Add mask fields to atomic struct of ib_send_wr - Add new opcodes to ib_wc_opcode Signed-off-by: Vladimir Sokolovsky <[email protected]> --- include/rdma/ib_verbs.h | 9 ++++++++- 1 files changed, 8 insertions(+), 1 deletions(-) diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 09509ed..e2adeef 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -105,6 +105,7 @@ enum ib_device_cap_flags { IB_DEVICE_UD_TSO = (1<<19), IB_DEVICE_MEM_MGT_EXTENSIONS = (1<<21), IB_DEVICE_BLOCK_MULTICAST_LOOPBACK = (1<<22), + IB_DEVICE_MASKED_ATOMIC = (1<<23), }; enum ib_atomic_cap { @@ -472,7 +473,9 @@ enum ib_wc_opcode { * receive by testing (opcode & IB_WC_RECV). */ IB_WC_RECV = 1 << 7, - IB_WC_RECV_RDMA_WITH_IMM + IB_WC_RECV_RDMA_WITH_IMM, + IB_WC_MASKED_COMP_SWAP, + IB_WC_MASKED_FETCH_ADD }; enum ib_wc_flags { @@ -689,6 +692,8 @@ enum ib_wr_opcode { IB_WR_RDMA_READ_WITH_INV, IB_WR_LOCAL_INV, IB_WR_FAST_REG_MR, + IB_WR_ATOMIC_MASKED_CMP_AND_SWP, + IB_WR_ATOMIC_MASKED_FETCH_AND_ADD, }; enum ib_send_flags { @@ -732,6 +737,8 @@ struct ib_send_wr { u64 compare_add; u64 swap; u32 rkey; + u64 compare_add_mask; + u64 swap_mask; } atomic; struct { struct ib_ah *ah; -- 1.5.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
