Commit Graph

8 Commits

Author SHA1 Message Date
Ira Weiny 8e4349d13f IB/mad: Add final OPA MAD processing
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 <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-06-12 14:49:18 -04:00
Ira Weiny c9082e51b6 IB/mad: Convert allocations from kmem_cache to kzalloc
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 <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-06-12 14:49:17 -04:00
Ira Weiny 73cdaaeed1 IB/core cleanup: Add const to args - agent_send_response
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 <ira.weiny@intel.com>
Reviewed-by: Hal Rosenstock <hal@mellanox.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-06-02 09:33:13 -04:00
Roland Dreier f3781d2e89 RDMA: Remove subversion $Id tags
They don't get updated by git and so they're worse than useless.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-07-14 23:48:44 -07:00
Hal Rosenstock 8fc394b197 IB/mad: agent_send_response() should be void
Nothing looks at the return value of agent_send_response(), so there's
no point in returning anything.

Signed-off-by: Hal Rosenstock <hal.rosenstock@gmail.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-08-03 10:45:17 -07:00
Al Viro 2d3c0b7bed [PATCH] missing include in infiniband
use of IS_ERR/PTR_ERR in infiniband/core/agent.c, without a portable
chain of includes pulling err.h (breaks on a bunch of platforms).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-10-29 10:35:07 -07:00
Sean Hefty 34816ad98e [IB] Fix MAD layer DMA mappings to avoid touching data buffer once mapped
The MAD layer was violating the DMA API by touching data buffers used
for sends after the DMA mapping was done.  This causes problems on
non-cache-coherent architectures, because the device doing DMA won't
see updates to the payload buffers that exist only in the CPU cache.

Fix this by having all MAD consumers use ib_create_send_mad() to
allocate their send buffers, and moving the DMA mapping into the MAD
layer so it can be done just before calling send (and after any
modifications of the send buffer by the MAD layer).

Tested on a non-cache-coherent PowerPC 440SPe system.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2005-10-25 10:51:39 -07:00
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00