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Message-ID: <551977E0.5030001@profitbricks.com>
Date: Mon, 30 Mar 2015 18:20:48 +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 07/11] IB/Verbs: Use management helper has_mcast()
and, cap_mcast() for mcast-check
On 03/30/2015 06:11 PM, Doug Ledford wrote:
> On Fri, 2015-03-27 at 16:46 +0100, Michael Wang wrote:
>> Introduce helper has_mcast() and cap_mcast() to help us check if an
>> IB device or it's port support Multicast.
> This probably needs reworded or rethought. In truth, *all* rdma devices
> are multicast capable. *BUT*, IB/OPA devices require multicast
> registration done the IB way (including for sendonly multicast sends),
> while Ethernet devices do multicast the Ethernet way. These tests are
> really just for IB specific multicast registration and deregistration.
> Call it has_mcast() and cap_mcast() is incorrect.
Thanks for the explanation :-)
Jason also mentioned we should use cap_ib_XX() instead, I'll use
that name then we can distinguish the management between
Eth and IB/OPA.
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 | 2 +-
>> drivers/infiniband/core/multicast.c | 8 ++++----
>> include/rdma/ib_verbs.h | 28 ++++++++++++++++++++++++++++
>> 3 files changed, 33 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
>> index 276fb76..cbbc85b 100644
>> --- a/drivers/infiniband/core/cma.c
>> +++ b/drivers/infiniband/core/cma.c
>> @@ -3398,7 +3398,7 @@ void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
>> ib_detach_mcast(id->qp,
>> &mc->multicast.ib->rec.mgid,
>> be16_to_cpu(mc->multicast.ib->rec.mlid));
>> - if (rdma_transport_is_ib(id_priv->cma_dev->device)) {
>> + if (has_mcast(id_priv->cma_dev->device)) {
>> switch (rdma_port_get_link_layer(id->device, id->port_num)) {
>> case IB_LINK_LAYER_INFINIBAND:
>> ib_sa_free_multicast(mc->multicast.ib);
>> diff --git a/drivers/infiniband/core/multicast.c b/drivers/infiniband/core/multicast.c
>> index 17573ff..ffeaf27 100644
>> --- a/drivers/infiniband/core/multicast.c
>> +++ b/drivers/infiniband/core/multicast.c
>> @@ -780,7 +780,7 @@ static void mcast_event_handler(struct ib_event_handler *handler,
>> int index;
>>
>> dev = container_of(handler, struct mcast_device, event_handler);
>> - if (!rdma_port_ll_is_ib(dev->device, event->element.port_num))
>> + if (!cap_mcast(dev->device, event->element.port_num))
>> return;
>>
>> index = event->element.port_num - dev->start_port;
>> @@ -807,7 +807,7 @@ static void mcast_add_one(struct ib_device *device)
>> int i;
>> int count = 0;
>>
>> - if (!rdma_transport_is_ib(device))
>> + if (!has_mcast(device))
>> return;
>>
>> dev = kmalloc(sizeof *dev + device->phys_port_cnt * sizeof *port,
>> @@ -823,7 +823,7 @@ static void mcast_add_one(struct ib_device *device)
>> }
>>
>> for (i = 0; i <= dev->end_port - dev->start_port; i++) {
>> - if (!rdma_port_ll_is_ib(device, dev->start_port + i))
>> + if (!cap_mcast(device, dev->start_port + i))
>> continue;
>> port = &dev->port[i];
>> port->dev = dev;
>> @@ -861,7 +861,7 @@ static void mcast_remove_one(struct ib_device *device)
>> flush_workqueue(mcast_wq);
>>
>> for (i = 0; i <= dev->end_port - dev->start_port; i++) {
>> - if (rdma_port_ll_is_ib(device, dev->start_port + i)) {
>> + if (cap_mcast(device, dev->start_port + i)) {
>> port = &dev->port[i];
>> deref_port(port);
>> wait_for_completion(&port->comp);
>> diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
>> index fa8ffa3..e796104 100644
>> --- a/include/rdma/ib_verbs.h
>> +++ b/include/rdma/ib_verbs.h
>> @@ -1823,6 +1823,19 @@ static inline int has_sa(struct ib_device *device)
>> }
>>
>> /**
>> + * has_mcast - Check if a device support Multicast.
>> + *
>> + * @device: Device to be checked
>> + *
>> + * Return 0 when a device has none port to support
>> + * Multicast.
>> + */
>> +static inline int has_mcast(struct ib_device *device)
>> +{
>> + return rdma_transport_is_ib(device);
>> +}
>> +
>> +/**
>> * cap_smi - Check if the port of device has the capability
>> * Subnet Management Interface.
>> *
>> @@ -1852,6 +1865,21 @@ static inline int cap_sa(struct ib_device *device, u8 port_num)
>> return rdma_port_ll_is_ib(device, port_num);
>> }
>>
>> +/**
>> + * cap_mcast - Check if the port of device has the capability
>> + * Multicast.
>> + *
>> + * @device: Device to be checked
>> + * @port_num: Port number of the device
>> + *
>> + * Return 0 when port of the device don't support
>> + * Multicast.
>> + */
>> +static inline int cap_mcast(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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