Adding support to the extended version of poll_cq verb to read completion timestamp. Reading timestamp isn't supported with reading IBV_WC_EX_WITH_SL and IBV_WC_EX_WITH_SLID.
Signed-off-by: Matan Barak <[email protected]> --- src/cq.c | 10 ++++++++++ src/mlx4.h | 25 ++++++++++++++++++++----- src/verbs.c | 3 ++- 3 files changed, 32 insertions(+), 6 deletions(-) diff --git a/src/cq.c b/src/cq.c index c86e824..7f40f12 100644 --- a/src/cq.c +++ b/src/cq.c @@ -399,6 +399,16 @@ static inline int _mlx4_poll_one_ex(struct mlx4_cq *cq, if (err != CQ_CONTINUE) return err; + if (wc_flags & IBV_WC_EX_WITH_COMPLETION_TIMESTAMP) { + uint16_t timestamp_0_15 = cqe->timestamp_0_7 | + cqe->timestamp_8_15 << 8; + + wc_flags_out |= IBV_WC_EX_WITH_COMPLETION_TIMESTAMP; + *wc_buffer.b64++ = (((uint64_t)ntohl(cqe->timestamp_16_47) + + !timestamp_0_15) << 16) | + (uint64_t)timestamp_0_15; + } + if (is_send) { switch (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) { case MLX4_OPCODE_RDMA_WRITE_IMM: diff --git a/src/mlx4.h b/src/mlx4.h index e22f879..2465298 100644 --- a/src/mlx4.h +++ b/src/mlx4.h @@ -312,14 +312,29 @@ struct mlx4_cqe { uint32_t vlan_my_qpn; uint32_t immed_rss_invalid; uint32_t g_mlpath_rqpn; - uint8_t sl_vid; - uint8_t reserved1; - uint16_t rlid; - uint32_t status; + union { + struct { + union { + struct { + uint8_t sl_vid; + uint8_t reserved1; + uint16_t rlid; + }; + uint32_t timestamp_16_47; + }; + uint32_t status; + }; + struct { + uint16_t reserved2; + uint8_t smac[6]; + }; + }; uint32_t byte_cnt; uint16_t wqe_index; uint16_t checksum; - uint8_t reserved3[3]; + uint8_t reserved3; + uint8_t timestamp_8_15; + uint8_t timestamp_0_7; uint8_t owner_sr_opcode; }; diff --git a/src/verbs.c b/src/verbs.c index 0dcdc87..a8d6bd7 100644 --- a/src/verbs.c +++ b/src/verbs.c @@ -286,7 +286,8 @@ enum { }; enum { - CREATE_CQ_SUPPORTED_WC_FLAGS = IBV_WC_STANDARD_FLAGS + CREATE_CQ_SUPPORTED_WC_FLAGS = IBV_WC_STANDARD_FLAGS | + IBV_WC_EX_WITH_COMPLETION_TIMESTAMP }; static struct ibv_cq *create_cq(struct ibv_context *context, -- 2.1.0 -- 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
