netdev - Re: [RFC PATCH 02/11] IB/Verbs: Use management helper tech

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Date:	Mon, 30 Mar 2015 18:23:16 +0200
From:	Michael Wang <yun.wang@...fitbricks.com>
To:	Doug Ledford <dledford@...hat.com>
CC:	Roland Dreier <roland@...nel.org>,
	Sean Hefty <sean.hefty@...el.com>,
	Hal Rosenstock <hal.rosenstock@...il.com>,
	Ira Weiny <ira.weiny@...el.com>, linux-rdma@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-nfs@...r.kernel.org,
	netdev@...r.kernel.org, "J. Bruce Fields" <bfields@...ldses.org>,
	Trond Myklebust <trond.myklebust@...marydata.com>,
	"David S. Miller" <davem@...emloft.net>,
	Or Gerlitz <ogerlitz@...lanox.com>,
	Moni Shoua <monis@...lanox.com>,
	PJ Waskiewicz <pj.waskiewicz@...idfire.com>,
	Tatyana Nikolova <Tatyana.E.Nikolova@...el.com>,
	Yan Burman <yanb@...lanox.com>,
	Jack Morgenstein <jackm@....mellanox.co.il>,
	Bart Van Assche <bvanassche@....org>,
	Yann Droneaud <ydroneaud@...eya.com>,
	Colin Ian King <colin.king@...onical.com>,
	Majd Dibbiny <majd@...lanox.com>,
	Jiri Kosina <jkosina@...e.cz>,
	Matan Barak <matanb@...lanox.com>,
	Alex Estrin <alex.estrin@...el.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Erez Shitrit <erezsh@...lanox.com>,
	Sagi Grimberg <sagig@...lanox.com>,
	Haggai Eran <haggaie@...lanox.com>,
	Shachar Raindel <raindel@...lanox.com>,
	Mike Marciniszyn <mike.marciniszyn@...el.com>,
	Steve Wise <swise@...ngridcomputing.com>,
	Tom Tucker <tom@....us>, Chuck Lever <chuck.lever@...cle.com>
Subject: Re: [RFC PATCH 02/11] IB/Verbs: Use management helper tech_iboe()
 for iboe-check

On 03/30/2015 06:17 PM, Doug Ledford wrote:
> On Fri, 2015-03-27 at 16:42 +0100, Michael Wang wrote:
>> Introduce helper tech_iboe() to help us check if the port of an IB
>> device is using RoCE/IBoE technology.
> Just use rdma_transport_is_roce() instead.
Sounds good :-) will be in next version.

Regards,
Michael Wang

>
>> Cc: Jason Gunthorpe <jgunthorpe@...idianresearch.com>
>> Cc: Doug Ledford <dledford@...hat.com>
>> Cc: Ira Weiny <ira.weiny@...el.com>
>> Cc: Sean Hefty <sean.hefty@...el.com>
>> Signed-off-by: Michael Wang <yun.wang@...fitbricks.com>
>> ---
>>  drivers/infiniband/core/cma.c |  6 ++----
>>  include/rdma/ib_verbs.h       | 16 ++++++++++++++++
>>  2 files changed, 18 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
>> index 668e955..280cfe3 100644
>> --- a/drivers/infiniband/core/cma.c
>> +++ b/drivers/infiniband/core/cma.c
>> @@ -375,8 +375,7 @@ static int cma_acquire_dev(struct rdma_id_private *id_priv,
>>                       listen_id_priv->id.port_num) == dev_ll) {
>>          cma_dev = listen_id_priv->cma_dev;
>>          port = listen_id_priv->id.port_num;
>> -        if (rdma_transport_is_ib(cma_dev->device) &&
>> -            rdma_port_ll_is_eth(cma_dev->device, port))
>> +        if (tech_iboe(cma_dev->device, port))
>>              ret = ib_find_cached_gid(cma_dev->device, &iboe_gid,
>>                           &found_port, NULL);
>>          else
>> @@ -395,8 +394,7 @@ static int cma_acquire_dev(struct rdma_id_private *id_priv,
>>                  listen_id_priv->id.port_num == port)
>>                  continue;
>>              if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) {
>> -                if (rdma_transport_is_ib(cma_dev->device) &&
>> -                    rdma_port_ll_is_eth(cma_dev->device, port))
>> +                if (tech_iboe(cma_dev->device, port))
>>                      ret = ib_find_cached_gid(cma_dev->device, &iboe_gid, &found_port, NULL);
>>                  else
>>                      ret = ib_find_cached_gid(cma_dev->device, &gid, &found_port, NULL);
>> diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
>> index 2bf9094..ca6d6bc 100644
>> --- a/include/rdma/ib_verbs.h
>> +++ b/include/rdma/ib_verbs.h
>> @@ -1767,6 +1767,22 @@ static inline int rdma_port_ll_is_eth(struct ib_device *device, u8 port_num)
>>              == IB_LINK_LAYER_ETHERNET;
>>  }
>>  
>> +/**
>> + * tech_iboe - Check if the port of device using technology
>> + * RoCE/IBoE.
>> + *
>> + * @device: Device to be checked
>> + * @port_num: Port number of the device
>> + *
>> + * Return 0 when port of the device is not using technology
>> + * RoCE/IBoE.
>> + */
>> +static inline int tech_iboe(struct ib_device *device, u8 port_num)
>> +{
>> +    return rdma_transport_is_ib(device) &&
>> +            rdma_port_ll_is_eth(device, port_num);
>> +}
>> +
>>  int ib_query_gid(struct ib_device *device,
>>           u8 port_num, int index, union ib_gid *gid);
>>  
>

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