linux-toradex.git/drivers/infiniband/core/sa_query.c, branch v3.11

IB/sa: Export function to pack a path record into wire format

2013-06-21T06:35:39+00:00

Allow converting from struct ib_sa_path_rec to the IB defined SA path
record wire format.  This will be used to report path data from the
rdma cm into user space.

Signed-off-by: Sean Hefty 
Signed-off-by: Roland Dreier

IB/core: convert to idr_alloc()

2013-02-28T03:10:16+00:00

Convert to the much saner new idr interface.

v2: Mike triggered WARN_ON() in idr_preload() because send_mad(),
    which may be used from non-process context, was calling
    idr_preload() unconditionally.  Preload iff @gfp_mask has
    __GFP_WAIT.

Signed-off-by: Tejun Heo 
Reviewed-by: Sean Hefty 
Reported-by: "Marciniszyn, Mike" 
Cc: Roland Dreier 
Cc: Sean Hefty 
Cc: Hal Rosenstock 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

IB/sa: Add GuidInfoRecord query support

2012-07-09T01:05:06+00:00

This query is needed for SRIOV alias GUID support.

The query is implemented per the IB Spec definition
in section 15.2.5.18 (GuidInfoRecord).

Signed-off-by: Erez Shitrit 
Signed-off-by: Jack Morgenstein 
Signed-off-by: Or Gerlitz 
Signed-off-by: Roland Dreier

RDMA: Update missed conversion of flush_scheduled_work()

2011-01-29T00:39:08+00:00

Commit f06267104dd9 ("RDMA: Update workqueue usage") introduced ib_wq
and removed the use of flush_scheduled_work(); however, during the merge
process one chunk was lost in ib_sa_remove_one().  Fix it.

Signed-off-by: Tejun Heo 
Signed-off-by: Roland Dreier

RDMA: Update workqueue usage

2011-01-17T05:16:31+00:00

* ib_wq is added, which is used as the common workqueue for infiniband
  instead of the system workqueue.  All system workqueue usages
  including flush_scheduled_work() callers are converted to use and
  flush ib_wq.

* cancel_delayed_work() + flush_scheduled_work() converted to
  cancel_delayed_work_sync().

* qib_wq is removed and ib_wq is used instead.

This is to prepare for deprecation of flush_scheduled_work().

Signed-off-by: Tejun Heo 
Signed-off-by: Roland Dreier

RDMA/cm: Add RDMA CM support for IBoE devices

2010-10-13T22:46:43+00:00

Add support for IBoE device binding and IP --> GID resolution.  Path
resolving and multicast joining are implemented within cma.c by
filling in the responses and running callbacks in the CMA work queue.

IP --> GID resolution always yields IPv6 link local addresses; remote
GIDs are derived from the destination MAC address of the remote port.
Multicast GIDs are always mapped to multicast MACs as is done in IPv6.
(IPv4 multicast is enabled by translating IPv4 multicast addresses to
IPv6 multicast as described in
.)

Some helper functions are added to ib_addr.h.

Signed-off-by: Eli Cohen 
Signed-off-by: Roland Dreier

IB/mad: IBoE supports only QP1 (no QP0)

2010-10-13T16:38:11+00:00

Since IBoE is using Ethernet as its link layer, there is no central
management entity so there is need for QP0.  QP1 is still needed since
it handles communications between CM agents.  This patch will skip QP0
and create only QP1 for IBoE ports.

Signed-off-by: Eli Cohen 
Signed-off-by: Roland Dreier

RDMA/ucma: Add option to manually set IB path

2009-11-16T17:30:33+00:00

Export rdma_set_ib_paths to user space to allow applications to
manually set the IB path used for connections.  This allows
alternative ways for a user space application or library to obtain
path record information, including retrieving path information
from cached data, avoiding direct interaction with the IB SA.
The IB SA is a single, centralized entity that can limit scaling
on large clusters running MPI applications.

Future changes to the rdma cm can expand on this framework to
support the full range of features allowed by the IB CM, such as
separate forward and reverse paths and APM.

Signed-off-by: Sean Hefty 
Reviewed-By: Jason Gunthorpe 
Signed-off-by: Roland Dreier

IB: Use DEFINE_SPINLOCK() for static spinlocks

2009-09-06T03:24:23+00:00

Rather than just defining static spinlock_t variables and then
initializing them later in init functions, simply define them with
DEFINE_SPINLOCK() and remove the calls to spin_lock_init().  This cleans
up the source a tad and also shrinks the compiled code; eg on x86-64:

add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-40 (-40)
function                                     old     new   delta
ib_uverbs_init                               336     326     -10
ib_mad_init_module                           147     137     -10
ib_sa_init                                   123     103     -20

Signed-off-by: Roland Dreier

IB/sa_query: Fix AH leak due to update_sm_ah() race

2009-03-03T22:30:01+00:00

Our testing uncovered a race condition in ib_sa_event():

	spin_lock_irqsave(&port->ah_lock, flags);
	if (port->sm_ah)
		kref_put(&port->sm_ah->ref, free_sm_ah);
	port->sm_ah = NULL;
	spin_unlock_irqrestore(&port->ah_lock, flags);

	schedule_work(&sa_dev->port[event->element.port_num -
				    sa_dev->start_port].update_task);

If two events occur back-to-back (e.g., client-reregister and LID
change), both may pass the spinlock-protected code above before the
scheduled work updates the port->sm_ah handle.  Then if the scheduled
work ends up running twice, the second operation will then find a
non-NULL port->sm_ah, and will simply overwrite it in update_sm_ah --
resulting in an AH leak.

Signed-off-by: Jack Morgenstein 
Signed-off-by: Roland Dreier