From: Weihang Li <liweihang@huawei.com>
Date: Thu, 30 Apr 2020 18:31:30 +0800
Subject: RDMA/hns: Adjust lp_pktn_ini dynamically
Patch-mainline: v5.8-rc1
Git-commit: b713128de7a17c7173f869323f8a5f0593e52538
References: jsc#SLE-14777

lp_pktn_ini means the number of loopback slice packets for long messages,
it should depend on MTU(fixed to 4096B currently) and max size of SQ
inline.

Link: https://lore.kernel.org/r/1588242691-12913-3-git-send-email-liweihang@huawei.com
Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/infiniband/hw/hns/hns_roce_hw_v2.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -3977,7 +3977,8 @@ static int modify_qp_init_to_rtr(struct
 
 	/* mtu*(2^LP_PKTN_INI) should not bigger than 1 message length 64kb */
 	roce_set_field(context->byte_56_dqpn_err, V2_QPC_BYTE_56_LP_PKTN_INI_M,
-		       V2_QPC_BYTE_56_LP_PKTN_INI_S, 0);
+		       V2_QPC_BYTE_56_LP_PKTN_INI_S,
+		       ilog2(hr_dev->caps.max_sq_inline / IB_MTU_4096));
 	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);