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Date: Mon, 30 Mar 2015 18:42:03 +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 06/11] IB/Verbs: Use management helper has_sa() and
cap_sa(), for sa-check
On 03/30/2015 06:16 PM, Doug Ledford wrote:
> On Fri, 2015-03-27 at 16:46 +0100, Michael Wang wrote:
>> Introduce helper has_sa() and cap_sa() to help us check if an IB device
>> or it's port support Subnet Administrator.
> There's no functional reason to have both rdma_transport_is_ib and
> rdma_port_ll_is_ib, just use one. Then there is also no reason for both
> has_sa and cap_sa. Just use one.
The has_sa() will be eliminated :-)
rdma_transport_is_ib and rdma_port_ll_is_ib is actually just rough helper
to save some code, we can get rid of them when we no longer need them, but
currently device driver still using them a lot, I'm not sure if the new
mechanism could take cover all these cases...
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/sa_query.c | 12 ++++++------
>> include/rdma/ib_verbs.h | 28 ++++++++++++++++++++++++++++
>> 2 files changed, 34 insertions(+), 6 deletions(-)
>>
>> diff --git a/drivers/infiniband/core/sa_query.c b/drivers/infiniband/core/sa_query.c
>> index d95d25f..89c27da 100644
>> --- a/drivers/infiniband/core/sa_query.c
>> +++ b/drivers/infiniband/core/sa_query.c
>> @@ -450,7 +450,7 @@ static void ib_sa_event(struct ib_event_handler *handler, struct ib_event *event
>> struct ib_sa_port *port =
>> &sa_dev->port[event->element.port_num - sa_dev->start_port];
>>
>> - if (!rdma_port_ll_is_ib(handler->device, port->port_num))
>> + if (!cap_sa(handler->device, port->port_num))
>> return;
>>
>> spin_lock_irqsave(&port->ah_lock, flags);
>> @@ -1154,7 +1154,7 @@ static void ib_sa_add_one(struct ib_device *device)
>> struct ib_sa_device *sa_dev;
>> int s, e, i;
>>
>> - if (!rdma_transport_is_ib(device))
>> + if (!has_sa(device))
>> return;
>>
>> if (device->node_type == RDMA_NODE_IB_SWITCH)
>> @@ -1175,7 +1175,7 @@ static void ib_sa_add_one(struct ib_device *device)
>>
>> for (i = 0; i <= e - s; ++i) {
>> spin_lock_init(&sa_dev->port[i].ah_lock);
>> - if (!rdma_port_ll_is_ib(device, i + 1))
>> + if (!cap_sa(device, i + 1))
>> continue;
>>
>> sa_dev->port[i].sm_ah = NULL;
>> @@ -1205,14 +1205,14 @@ static void ib_sa_add_one(struct ib_device *device)
>> goto err;
>>
>> for (i = 0; i <= e - s; ++i)
>> - if (rdma_port_ll_is_ib(device, i + 1))
>> + if (cap_sa(device, i + 1))
>> update_sm_ah(&sa_dev->port[i].update_task);
>>
>> return;
>>
>> err:
>> while (--i >= 0)
>> - if (rdma_port_ll_is_ib(device, i + 1))
>> + if (cap_sa(device, i + 1))
>> ib_unregister_mad_agent(sa_dev->port[i].agent);
>>
>> kfree(sa_dev);
>> @@ -1233,7 +1233,7 @@ static void ib_sa_remove_one(struct ib_device *device)
>> flush_workqueue(ib_wq);
>>
>> for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
>> - if (rdma_port_ll_is_ib(device, i + 1)) {
>> + if (cap_sa(device, i + 1)) {
>> ib_unregister_mad_agent(sa_dev->port[i].agent);
>> if (sa_dev->port[i].sm_ah)
>> kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
>> diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
>> index c0a63f8..fa8ffa3 100644
>> --- a/include/rdma/ib_verbs.h
>> +++ b/include/rdma/ib_verbs.h
>> @@ -1810,6 +1810,19 @@ static inline int has_cm(struct ib_device *device)
>> }
>>
>> /**
>> + * has_sa - Check if a device support Subnet Administrator.
>> + *
>> + * @device: Device to be checked
>> + *
>> + * Return 0 when a device has none port to support
>> + * Subnet Administrator.
>> + */
>> +static inline int has_sa(struct ib_device *device)
>> +{
>> + return rdma_transport_is_ib(device);
>> +}
>> +
>> +/**
>> * cap_smi - Check if the port of device has the capability
>> * Subnet Management Interface.
>> *
>> @@ -1824,6 +1837,21 @@ static inline int cap_smi(struct ib_device *device, u8 port_num)
>> return rdma_port_ll_is_ib(device, port_num);
>> }
>>
>> +/**
>> + * cap_sa - Check if the port of device has the capability
>> + * Subnet Administrator.
>> + *
>> + * @device: Device to be checked
>> + * @port_num: Port number of the device
>> + *
>> + * Return 0 when port of the device don't support
>> + * Subnet Administrator.
>> + */
>> +static inline int cap_sa(struct ib_device *device, u8 port_num)
>> +{
>> + return rdma_port_ll_is_ib(device, port_num);
>> +}
>> +
>> int ib_query_gid(struct ib_device *device,
>> u8 port_num, int index, union ib_gid *gid);
>>
>
--
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