linux-kernel - Re: [PATCH for-next] RDMA/hns: Support DSCP

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Date: Mon, 1 Apr 2024 21:25:39 +0800
From: Junxian Huang <huangjunxian6@...ilicon.com>
To: Leon Romanovsky <leon@...nel.org>
CC: <jgg@...pe.ca>, <linux-rdma@...r.kernel.org>, <linuxarm@...wei.com>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH for-next] RDMA/hns: Support DSCP



On 2024/4/1 19:48, Leon Romanovsky wrote:
> On Fri, Mar 15, 2024 at 05:35:51PM +0800, Junxian Huang wrote:
>> Add support for DSCP configuration. For DSCP, get dscp-prio mapping
>> via hns3 nic driver api .get_dscp_prio() and fill the SL (in WQE for
>> UD or in QPC for RC) with the priority value. The prio-tc mapping is
>> configured to HW by hns3 nic driver. HW will select a corresponding
>> TC according to SL and the prio-tc mapping.
>>
>> Signed-off-by: Junxian Huang <huangjunxian6@...ilicon.com>
>> ---
>>  drivers/infiniband/hw/hns/hns_roce_ah.c     | 32 +++++---
>>  drivers/infiniband/hw/hns/hns_roce_device.h |  6 ++
>>  drivers/infiniband/hw/hns/hns_roce_hw_v2.c  | 86 ++++++++++++++++-----
>>  drivers/infiniband/hw/hns/hns_roce_qp.c     | 13 ++++
>>  include/uapi/rdma/hns-abi.h                 |  9 ++-
>>  5 files changed, 117 insertions(+), 29 deletions(-)
> 
> 1. What is TC mode?

TC mode indicates whether the HW is configured as DSCP mode or VLAN priority
mode currently.

> 2. Did you post rdma-core PR?

Not yet. I was meant to wait until this patch is applied. Should I post it
right now?

Junxian

> 
> Thanks