linux-toradex.git/drivers/infiniband/core/agent.c, branch v4.3.3

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/mad: Add final OPA MAD processing

2015-06-12T18:49:18+00:00

For devices which support OPA MADs

   1) Use previously defined SMP support functions.

   2) Pass correct base version to ib_create_send_mad when processing OPA MADs.

   3) Process out_mad_key_index returned by agents for a response.  This is
      necessary because OPA SMP packets must carry a valid pkey.

   4) Carry the correct segment size (OPA vs IBTA) of RMPP messages within
      ib_mad_recv_wc.

   5) Handle variable length OPA MADs by:

        * Adjusting the 'fake' WC for locally routed SMP's to represent the
          proper incoming byte_len
        * out_mad_size is used from the local HCA agents
                1) when sending agent responses on the wire
                2) when passing responses through the local_completions
		   function

	NOTE: wc.byte_len includes the GRH length and therefore is different
	      from the in_mad_size specified to the local HCA agents.
	      out_mad_size should _not_ include the GRH length as it is added

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

IB/mad: Convert allocations from kmem_cache to kzalloc

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

This patch implements allocating alternate receive MAD buffers within the MAD
stack.  Support for OPA to send/recv variable sized MADs is implemented later.

    1) Convert MAD allocations from kmem_cache to kzalloc

       kzalloc is more flexible to support devices with different sized MADs
       and research and testing showed that the current use of kmem_cache does
       not provide performance benefits over kzalloc.

    2) Change struct ib_mad_private to use a flex array for the mad data
    3) Allocate ib_mad_private based on the size specified by devices in
       rdma_max_mad_size.
    4) Carry the allocated size in ib_mad_private to be used when processing
       ib_mad_private objects.
    5) Alter DMA mappings based on the mad_size of ib_mad_private.
    6) Replace the use of sizeof and static defines as appropriate
    7) Add appropriate casts for the MAD data when calling processing
       functions.

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

IB/mad: Support alternate Base Versions when creating MADs

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

In preparation to support the new OPA MAD Base version, add a base version
parameter to ib_create_send_mad and set it to IB_MGMT_BASE_VERSION for current
users.

Definition of the new base version and it's processing will occur in later
patches.

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

IB/core cleanup: Add const to args - agent_send_response

2015-06-02T13:33:13+00:00

In order to support constant callers of agent_send_response we add const
specifiers to the its pointer arguments.

Adjust the call tree accordingly.

Signed-off-by: Ira Weiny 
Reviewed-by: Hal Rosenstock 
Reviewed-by: Jason Gunthorpe 
Signed-off-by: Doug Ledford

IB/Verbs: Use management helper rdma_cap_ib_smi()

2015-05-18T17:35:05+00:00

Introduce helper rdma_cap_ib_smi() to help us check if the port of an
IB device support Infiniband Subnet Management Interface.

Signed-off-by: Michael Wang 
Reviewed-by: Ira Weiny 
Tested-by: Ira Weiny 
Reviewed-by: Sean Hefty 
Reviewed-by: Jason Gunthorpe 
Tested-by: Doug Ledford 
Signed-off-by: Doug Ledford

IB/Verbs: Reform IB-core mad/agent/user_mad

2015-05-18T17:35:04+00:00

Use raw management helpers to reform IB-core mad/agent/user_mad.

Signed-off-by: Michael Wang 
Reviewed-by: Ira Weiny 
Tested-by: Ira Weiny 
Reviewed-by: Sean Hefty 
Reviewed-by: Jason Gunthorpe 
Tested-by: Doug Ledford 
Signed-off-by: Doug Ledford

IB/mad: add new ioctl to ABI to support new registration options

2014-08-11T03:36:00+00:00

Registrations options are specified through flags.  Definitions of flags will
be in subsequent patches.

Signed-off-by: Ira Weiny 
Signed-off-by: Roland Dreier

IB/mad: Update module to [pr|dev]_* style print messages

2014-08-11T03:35:39+00:00

Use dev_* style print when struct device is available.

Also combine previously line broken user-visible strings as per
Documentation/CodingStyle:

"However, never break user-visible strings such as printk messages,
because that breaks the ability to grep for them."

Signed-off-by: Ira Weiny 

[ Remove PFX so the patch actually builds.  - Roland ]

Signed-off-by: Roland Dreier

IB/mad: Improve an error message so error code is included

2011-03-18T16:42:20+00:00

Signed-off-by: Michael Heinz 
Signed-off-by: Roland Dreier