From: Leon Romanovsky <leon@kernel.org>
To: "Wei Hu (Xavier)" <xavier.huwei@huawei.com>
Cc: Lijun Ou <oulijun@huawei.com>,
dledford@redhat.com, sean.hefty@intel.com,
hal.rosenstock@gmail.com, davem@davemloft.net,
jeffrey.t.kirsher@intel.com, jiri@mellanox.com,
ogerlitz@mellanox.com, linux-rdma@vger.kernel.org,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
gongyangming@huawei.com, xiaokun@huawei.com,
tangchaofei@huawei.com, haifeng.wei@huawei.com,
yisen.zhuang@huawei.com, yankejian@huawei.com,
charles.chenxin@huawei.com, linuxarm@huawei.com
Subject: Re: [PATCH v10 08/22] IB/hns: Add icm support
Date: Tue, 21 Jun 2016 14:55:54 +0300 [thread overview]
Message-ID: <20160621115554.GB9762@leon.nu> (raw)
In-Reply-To: <5768C493.6000300@huawei.com>
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On Tue, Jun 21, 2016 at 12:37:39PM +0800, Wei Hu (Xavier) wrote:
>
>
> On 2016/6/20 21:04, Leon Romanovsky wrote:
> >On Mon, Jun 20, 2016 at 05:48:15PM +0800, Wei Hu (Xavier) wrote:
> >>
> >>On 2016/6/20 17:27, Leon Romanovsky wrote:
> >>>On Mon, Jun 20, 2016 at 03:49:24PM +0800, Wei Hu (Xavier) wrote:
> >>>>On 2016/6/20 14:06, Leon Romanovsky wrote:
> >>>>>On Mon, Jun 20, 2016 at 12:37:40PM +0800, Wei Hu (Xavier) wrote:
> >>>>>>On 2016/6/17 17:58, Leon Romanovsky wrote:
> >>>>>>>On Thu, Jun 16, 2016 at 10:35:16PM +0800, Lijun Ou wrote:
> >>>>>>>>This patch mainly added icm support for RoCE. It initializes icm
> >>>>>>>>which managers the relative memory blocks for RoCE. The data
> >>>>>>>>structures of RoCE will be located in it. For example, CQ table,
> >>>>>>>>QP table and MTPT table so on.
> >>>>>>>>
> >>>>>>>>Signed-off-by: Wei Hu <xavier.huwei@huawei.com>
> >>>>>>>>Signed-off-by: Nenglong Zhao <zhaonenglong@hisilicon.com>
> >>>>>>>>Signed-off-by: Lijun Ou <oulijun@huawei.com>
> >>>>>>>>---
> >>>>>>><...>
> >>>>>>>
> >>>>>>>>+
> >>>>>Another question which you didn't answer [1].
> >>>>>
> >>>>>"I wonder if you have the same needs for ICM as it is in mlx4 device.
> >>>>>Do you have firmware?"
> >>>>>
> >>>>>[1] http://marc.info/?l=linux-rdma&m=146545553104913&w=2
> >>>>Hi, Leon
> >>>> Now we haven't firmware.
> >>>> But hardware still need memory for QPC\CQC\MTPT\mtt etc.
> >>>ICM stands for InfiniHost (Interconnect) Context Memory is a specific
> >>>memory place to share between host <-> FW and host <-> HW if HW is
> >>>aware of specific structures.
> >>>
> >>>I assume that in your case, it is enough to allocate memory region and
> >>>supply it to HW. Am I right?
> >>For Our hardware,
> >>1. ICM has a memory management method, It's very good for QPC\CQC\MTPT\mtt
> >>etc. we need it.
> >You need special HW to leverage its. AFAIK it is Mellanox specific.
> For our hardware, we use ICM to memory management, the memory shared with
> host and HW.
> QPC\CQC\MTPT\mtt has specific memory requirement.
> QPC\CQC\MTPT need continuous memory. we use ICM to management the block of
> memory. It's very good!
I wasn't convinced why do you need to copy whole ICM logic which is
specific to Mellanox. Your requirements can be implemented by standard CMA
and/or DMA.
> >>2. The meomry for QPC\CQC\MTPT\mtt only used for RoCE hardware and driver,
> >>we don't want use MR.
> >I didn't mean Infiniband MR, but memory region returned from standard
> >allocation functions (kmalloc, ...).
> >
> >>3. Now we haven't firmware, maybe we need it next version.
> >You are always invited to add support once it will be needed, no need to
> >add it in advance.
> >
> >Thanks
>
>
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next prev parent reply other threads:[~2016-06-21 11:56 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-16 14:35 [PATCH v10 00/22] Add HiSilicon RoCE driver Lijun Ou
2016-06-16 14:35 ` [PATCH v10 01/22] net: hns: Add reset function support for " Lijun Ou
2016-06-24 11:49 ` Leon Romanovsky
2016-06-27 6:41 ` oulijun
2016-06-16 14:35 ` [PATCH v10 02/22] devicetree: bindings: IB: Add binding document for HiSilicon RoCE Lijun Ou
2016-06-16 14:35 ` [PATCH v10 03/22] IB/hns: Add initial main frame driver and get cfg info Lijun Ou
2016-06-24 11:48 ` Leon Romanovsky
[not found] ` <576E5D0B.7010003@huawei.com>
2016-06-27 7:00 ` Leon Romanovsky
2016-06-27 7:29 ` Wei Hu (Xavier)
2016-06-16 14:35 ` [PATCH v10 04/22] IB/hns: Add RoCE engine reset function Lijun Ou
2016-06-24 14:59 ` Leon Romanovsky
[not found] ` <576E5C21.5030904@huawei.com>
2016-06-27 8:01 ` Leon Romanovsky
2016-06-27 8:31 ` oulijun
2016-06-28 6:31 ` Wei Hu (Xavier)
2016-06-28 8:09 ` Leon Romanovsky
2016-06-16 14:35 ` [PATCH v10 05/22] IB/hns: Add initial profile resource Lijun Ou
2016-06-24 15:10 ` Leon Romanovsky
2016-06-28 6:56 ` oulijun
2016-06-16 14:35 ` [PATCH v10 06/22] IB/hns: Add initial cmd operation Lijun Ou
2016-06-20 13:33 ` Leon Romanovsky
2016-06-21 10:50 ` Wei Hu (Xavier)
2016-06-21 11:28 ` Leon Romanovsky
2016-06-21 13:01 ` Wei Hu (Xavier)
2016-06-22 4:54 ` Leon Romanovsky
2016-06-22 6:50 ` Wei Hu (Xavier)
2016-06-16 14:35 ` [PATCH v10 07/22] IB/hns: Add event queue support Lijun Ou
2016-06-24 15:46 ` Leon Romanovsky
2016-06-24 15:56 ` Doug Ledford
2016-06-29 8:53 ` oulijun
2016-06-29 10:41 ` Leon Romanovsky
2016-06-16 14:35 ` [PATCH v10 08/22] IB/hns: Add icm support Lijun Ou
2016-06-17 9:58 ` Leon Romanovsky
[not found] ` <57677314.70909@huawei.com>
2016-06-20 6:06 ` Leon Romanovsky
2016-06-20 7:49 ` Wei Hu (Xavier)
2016-06-20 9:27 ` Leon Romanovsky
2016-06-20 9:48 ` Wei Hu (Xavier)
2016-06-20 13:04 ` Leon Romanovsky
2016-06-21 4:37 ` Wei Hu (Xavier)
2016-06-21 11:55 ` Leon Romanovsky [this message]
2016-06-22 3:53 ` Wei Hu (Xavier)
2016-06-16 14:35 ` [PATCH v10 09/22] IB/hns: Add hca support Lijun Ou
2016-06-24 15:50 ` Leon Romanovsky
2016-06-16 14:35 ` [PATCH v10 10/22] IB/hns: Add process flow to init RoCE engine Lijun Ou
2016-06-16 14:35 ` [PATCH v10 11/22] IB/hns: Add IB device registration Lijun Ou
2016-06-16 14:35 ` [PATCH v10 12/22] IB/hns: Set mtu and gid support Lijun Ou
2016-06-16 14:35 ` [PATCH v10 13/22] IB/hns: Add interface of the protocol stack registration Lijun Ou
2016-06-16 14:35 ` [PATCH v10 14/22] IB/hns: Add operations support for IB device and port Lijun Ou
2016-06-16 14:35 ` [PATCH v10 15/22] IB/hns: Add PD operations support Lijun Ou
2016-06-16 14:35 ` [PATCH v10 16/22] IB/hns: Add ah " Lijun Ou
2016-06-16 14:35 ` [PATCH v10 17/22] IB/hns: Add QP " Lijun Ou
2016-06-16 14:35 ` [PATCH v10 18/22] IB/hns: Add CQ " Lijun Ou
2016-06-16 14:35 ` [PATCH v10 19/22] IB/hns: Add memory region " Lijun Ou
2016-06-16 14:35 ` [PATCH v10 20/22] IB/hns: Add operation for getting immutable port Lijun Ou
2016-06-16 14:35 ` [PATCH v10 21/22] IB/hns: Kconfig and Makefile for RoCE module Lijun Ou
2016-06-16 14:35 ` [PATCH v10 22/22] MAINTAINERS: Add maintainers for HiSilicon RoCE driver Lijun Ou
2016-06-24 15:55 ` [PATCH v10 00/22] Add " Leon Romanovsky
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