From fbed9d2be292504e04caa2057e3a9477a1e1d040 Mon Sep 17 00:00:00 2001 From: Weihang Li Date: Sat, 19 Sep 2020 18:03:21 +0800 Subject: [PATCH] RDMA/hns: Fix configuration of ack_req_freq in QPC The hardware will add AckReq flag in BTH header according to the value of ack_req_freq to request ACK from responder for the packets with this flag. It should be greater than or equal to lp_pktn_ini instead of using a fixed value. Fixes: 7b9bd73ed13d ("RDMA/hns: Fix wrong assignment of lp_pktn_ini in QPC") Link: https://lore.kernel.org/r/1600509802-44382-8-git-send-email-liweihang@huawei.com Signed-off-by: Weihang Li Signed-off-by: Jason Gunthorpe --- drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c index f36e1a729e89..652ddfffa214 100644 --- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c @@ -3745,9 +3745,6 @@ static void modify_qp_reset_to_init(struct ib_qp *ibqp, V2_QPC_BYTE_76_SRQ_EN_S, 1); } - roce_set_field(context->byte_172_sq_psn, V2_QPC_BYTE_172_ACK_REQ_FREQ_M, - V2_QPC_BYTE_172_ACK_REQ_FREQ_S, 4); - roce_set_bit(context->byte_172_sq_psn, V2_QPC_BYTE_172_FRE_S, 1); hr_qp->access_flags = attr->qp_access_flags; @@ -4058,6 +4055,7 @@ static int modify_qp_init_to_rtr(struct ib_qp *ibqp, dma_addr_t trrl_ba; dma_addr_t irrl_ba; enum ib_mtu mtu; + u8 lp_pktn_ini; u8 port_num; u64 *mtts; u8 *dmac; @@ -4165,13 +4163,21 @@ static int modify_qp_init_to_rtr(struct ib_qp *ibqp, } #define MAX_LP_MSG_LEN 65536 - /* MTU*(2^LP_PKTN_INI) shouldn't be bigger than 64kb */ + /* MTU * (2 ^ LP_PKTN_INI) shouldn't be bigger than 64KB */ + lp_pktn_ini = ilog2(MAX_LP_MSG_LEN / ib_mtu_enum_to_int(mtu)); + roce_set_field(context->byte_56_dqpn_err, V2_QPC_BYTE_56_LP_PKTN_INI_M, - V2_QPC_BYTE_56_LP_PKTN_INI_S, - ilog2(MAX_LP_MSG_LEN / ib_mtu_enum_to_int(mtu))); + V2_QPC_BYTE_56_LP_PKTN_INI_S, lp_pktn_ini); roce_set_field(qpc_mask->byte_56_dqpn_err, V2_QPC_BYTE_56_LP_PKTN_INI_M, V2_QPC_BYTE_56_LP_PKTN_INI_S, 0); + /* ACK_REQ_FREQ should be larger than or equal to LP_PKTN_INI */ + roce_set_field(context->byte_172_sq_psn, V2_QPC_BYTE_172_ACK_REQ_FREQ_M, + V2_QPC_BYTE_172_ACK_REQ_FREQ_S, lp_pktn_ini); + roce_set_field(qpc_mask->byte_172_sq_psn, + V2_QPC_BYTE_172_ACK_REQ_FREQ_M, + V2_QPC_BYTE_172_ACK_REQ_FREQ_S, 0); + roce_set_bit(qpc_mask->byte_108_rx_reqepsn, V2_QPC_BYTE_108_RX_REQ_PSN_ERR_S, 0); roce_set_field(qpc_mask->byte_96_rx_reqmsn, V2_QPC_BYTE_96_RX_REQ_MSN_M, -- 2.11.0