linux-toradex.git/include/rdma/ib_sa.h, branch v4.4.95

RDMA/core: Fix incorrect structure packing for booleans

2017-03-12T05:37:29+00:00

commit 55efcfcd7776165b294f8b5cd6e05ca00ec89b7c upstream.

The RDMA core uses ib_pack() to convert from unpacked CPU structs
to on-the-wire bitpacked structs.

This process requires that 1 bit fields are declared as u8 in the
unpacked struct, otherwise the packing process does not read the
value properly and the packed result is wired to 0. Several
places wrongly used int.

Crucially this means the kernel has never, set reversible
correctly in the path record request. It has always asked for
irreversible paths even if the ULP requests otherwise.

When the kernel is used with a SM that supports this feature, it
completely breaks communication management if reversible paths are
not properly requested.

The only reason this ever worked is because opensm ignores the
reversible bit.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Jason Gunthorpe 
Signed-off-by: Doug Ledford 
Signed-off-by: Greg Kroah-Hartman

IB/core: Remove smac and vlan id from path record

2015-10-22T03:48:18+00:00

The GID cache accompanies every GID with attributes.
The GID attributes link the GID with its netdevice, which could be
resolved to smac and vlan id easily. Since we've added the netdevice
(ifindex and net) to the path record, storing the L2 attributes is
duplicated data and hence these attributes are removed.

Signed-off-by: Matan Barak 
Reviewed-By: Devesh Sharma 
Signed-off-by: Doug Ledford

IB/core: Add netdev to path record

2015-10-22T03:48:17+00:00

In order to find the sgid_index, one could just query the IB cache
with the correct GID and netdevice. Therefore, instead of storing
the L2 attributes directly in the path, we only store the
ifindex and net and use them later to get the sgid_index.
The vlan_id and smac L2 attributes are removed in a later patch.

Signed-off-by: Matan Barak 
Reviewed-By: Devesh Sharma 
Signed-off-by: Doug Ledford

IB/core: Ethernet L2 attributes in verbs/cm structures

2014-01-14T22:20:54+00:00

This patch add the support for Ethernet L2 attributes in the
verbs/cm/cma structures.

When dealing with L2 Ethernet, we should use smac, dmac, vlan ID and priority
in a similar manner that the IB L2 (and the L4 PKEY) attributes are used.

Thus, those attributes were added to the following structures:

* ib_ah_attr - added dmac
* ib_qp_attr - added smac and vlan_id, (sl remains vlan priority)
* ib_wc - added smac, vlan_id
* ib_sa_path_rec - added smac, dmac, vlan_id
* cm_av - added smac and vlan_id

For the path record structure, extra care was taken to avoid the new
fields when packing it into wire format, so we don't break the IB CM
and SA wire protocol.

On the active side, the CM fills. its internal structures from the
path provided by the ULP.  We add there taking the ETH L2 attributes
and placing them into the CM Address Handle (struct cm_av).

On the passive side, the CM fills its internal structures from the WC
associated with the REQ message.  We add there taking the ETH L2
attributes from the WC.

When the HW driver provides the required ETH L2 attributes in the WC,
they set the IB_WC_WITH_SMAC and IB_WC_WITH_VLAN flags. The IB core
code checks for the presence of these flags, and in their absence does
address resolution from the ib_init_ah_from_wc() helper function.

ib_modify_qp_is_ok is also updated to consider the link layer. Some
parameters are mandatory for Ethernet link layer, while they are
irrelevant for IB.  Vendor drivers are modified to support the new
function signature.

Signed-off-by: Matan Barak 
Signed-off-by: Or Gerlitz 
Signed-off-by: Roland Dreier

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/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

atomic: use

2011-07-26T23:49:47+00:00

This allows us to move duplicated code in 
(atomic_inc_not_zero() for now) to 

Signed-off-by: Arun Sharma 
Reviewed-by: Eric Dumazet 
Cc: Ingo Molnar 
Cc: David Miller 
Cc: Eric Dumazet 
Acked-by: Mike Frysinger 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

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

RDMA: Improve include file coding style

2008-07-15T06:48:44+00:00

Remove subversion $Id lines and improve readability by fixing other
coding style problems pointed out by checkpatch.pl.

Signed-off-by: Dotan Barak 
Signed-off-by: Roland Dreier

IB/sa: Add new QoS fields to path record

2007-10-10T02:59:12+00:00

The QoS annex defines new fields for path records.  Add them to the
ib_sa for consumers that want to use them.

Signed-off-by: Sean Hefty 
Reviewed-by: Or Gerlitz 
Signed-off-by: Roland Dreier