linux-stable.git/include/rdma/ib_verbs.h, branch linux-4.2.y

IB: Add rdma_cap_ib_switch helper and use where appropriate

2015-07-14T17:20:08+00:00

Persuant to Liran's comments on node_type on linux-rdma
mailing list:

In an effort to reform the RDMA core and ULPs to minimize use of
node_type in struct ib_device, an additional bit is added to
struct ib_device for is_switch (IB switch). This is needed
to be initialized by any IB switch device driver. This is a
NEW requirement on such device drivers which are all
"out of tree".

In addition, an ib_switch helper was added to ib_verbs.h
based on the is_switch device bit rather than node_type
(although those should be consistent).

The RDMA core (MAD, SMI, agent, sa_query, multicast, sysfs)
as well as (IPoIB and SRP) ULPs are updated where
appropriate to use this new helper. In some cases,
the helper is now used under the covers of using
rdma_[start end]_port rather than the open coding
previously used.

Reviewed-by: Sean Hefty 
Reviewed-By: Jason Gunthorpe 
Reviewed-by: Ira Weiny 
Tested-by: Ira Weiny 
Signed-off-by: Hal Rosenstock 
Signed-off-by: Doug Ledford

IB/core: Add OPA MAD core capability flag

2015-06-12T18:49:17+00:00

Add OPA MAD support flags to the core capability immutable flags.  In addition
add the rdma_cap_opa_mad helper function for core functions to use to detect
OPA MAD support.

OPA MADs share a common header with IBTA MADs but with some differences for
increased performance.

Sharing a common header with IBTA MADs allows us to share most of the MAD
processing code when dealing with OPA MADs in addition to supporting some IBTA
MADs on OPA devices.

OPA MADs differ in the following ways:

	1) MADs are variable size up to 2K
	   IBTA defined MADs remain fixed at 256 bytes
	2) OPA SMPs must carry valid PKeys
	3) OPA SMP packets are a different format

The MAD stack will use this new functionality to determine if OPA MAD
processing should occur on individual device ports.

Signed-off-by: Ira Weiny 
Signed-off-by: Doug Ledford

IB/mad: Add support for additional MAD info to/from drivers

2015-06-12T18:49:17+00:00

In order to support alternate sized MADs (and variable sized MADs on OPA
devices) add in/out MAD size parameters to the process_mad core call.

In addition, add an out_mad_pkey_index to communicate the pkey index the driver
wishes the MAD stack to use when sending OPA MAD responses.

The out MAD size and the out MAD PKey index are required by the MAD
stack to generate responses on OPA devices.

Furthermore, the in and out MAD parameters are made generic by specifying them
as ib_mad_hdr rather than ib_mad.

Drivers are modified as needed and are protected by BUG_ON flags if the MAD
sizes passed to them is incorrect.

Signed-off-by: Ira Weiny 
Signed-off-by: Doug Ledford

IB/core: Add ability for drivers to report an alternate MAD size.

2015-06-12T18:49:17+00:00

Add max MAD size to the device immutable data set and have all drivers that
support MADs report the current IB MAD size (IB_MGMT_MAD_SIZE) to the core.

Verify MAD size data in both the MAD core and when reading the immutable data.

OPA drivers will report alternate MAD sizes in subsequent patches.

Signed-off-by: Ira Weiny 
Signed-off-by: Doug Ledford

IB/core: Pass hardware specific data in query_device

2015-06-12T18:49:10+00:00

Vendors should be able to pass vendor specific data to/from
user-space via query_device uverb. In order to do this,
we need to pass the vendors' specific udata.

Signed-off-by: Matan Barak 
Signed-off-by: Or Gerlitz 
Signed-off-by: Doug Ledford

IB/core: Add timestamp_mask and hca_core_clock to query_device

2015-06-12T18:49:10+00:00

In order to expose timestamp we need to expose two new attributes in
query_device to be used for CQ completion time-stamping:

timestamp_mask - how many bits are valid in the timestamp, where timestamp
values could be 64bits the most.

hca_core_clock - timestamp is given in HW cycles, the frequency in KHZ units
of the HCA, necessary in order to convert cycles to seconds.

This is added both to ib_query_device and its respective uverbs counterpart.

Signed-off-by: Matan Barak 
Signed-off-by: Or Gerlitz 
Signed-off-by: Doug Ledford

IB/core: Add CQ creation time-stamping flag

2015-06-12T18:49:10+00:00

Add CQ creation flag which dictates that the created CQ will report
completion time-stamp value in the WC.

Signed-off-by: Matan Barak 
Signed-off-by: Or Gerlitz 
Signed-off-by: Doug Ledford

IB/core: Change ib_create_cq to use struct ib_cq_init_attr

2015-06-12T18:49:10+00:00

Currently, ib_create_cq uses cqe and comp_vecotr instead
of the extendible ib_cq_init_attr struct.

Earlier patches already changed the vendors to work with
ib_cq_init_attr. This patch changes the consumers too.

Signed-off-by: Matan Barak 
Signed-off-by: Or Gerlitz 
Signed-off-by: Doug Ledford

IB/core: Change provider's API of create_cq to be extendible

2015-06-12T18:49:10+00:00

Add a new ib_cq_init_attr structure which contains the
previous cqe (minimum number of CQ entries) and comp_vector
(completion vector) in addition to a new flags field.
All vendors' create_cq callbacks are changed in order
to work with the new API.

This commit does not change any functionality.

Signed-off-by: Matan Barak 
Signed-off-by: Or Gerlitz 
Reviewed-By: Devesh Sharma  to patch #2
Signed-off-by: Doug Ledford

IB/core: Don't advertise SA in RoCE port capabilities

2015-06-11T03:54:33+00:00

The Subnet Administrator (SA) is not a component of the RoCE spec.
Therefore, it should not be a capability of a RoCE port.

Signed-off-by: Moni Shoua 
Signed-off-by: Doug Ledford