1. 22 2月, 2013 1 次提交
    • S
      IB/core: Add "type 2" memory windows support · 7083e42e
      Shani Michaeli 提交于
      This patch enhances the IB core support for Memory Windows (MWs).
      
      MWs allow an application to have better/flexible control over remote
      access to memory.
      
      Two types of MWs are supported, with the second type having two flavors:
      
          Type 1  - associated with PD only
          Type 2A - associated with QPN only
          Type 2B - associated with PD and QPN
      
      Applications can allocate a MW once, and then repeatedly bind the MW
      to different ranges in MRs that are associated to the same PD. Type 1
      windows are bound through a verb, while type 2 windows are bound by
      posting a work request.
      
      The 32-bit memory key is composed of a 24-bit index and an 8-bit
      key. The key is changed with each bind, thus allowing more control
      over the peer's use of the memory key.
      
      The changes introduced are the following:
      
      * add memory window type enum and a corresponding parameter to ib_alloc_mw.
      * type 2 memory window bind work request support.
      * create a struct that contains the common part of the bind verb struct
        ibv_mw_bind and the bind work request into a single struct.
      * add the ib_inc_rkey helper function to advance the tag part of an rkey.
      
      Consumer interface details:
      
      * new device capability flags IB_DEVICE_MEM_WINDOW_TYPE_2A and
        IB_DEVICE_MEM_WINDOW_TYPE_2B are added to indicate device support
        for these features.
      
        Devices can set either IB_DEVICE_MEM_WINDOW_TYPE_2A or
        IB_DEVICE_MEM_WINDOW_TYPE_2B if it supports type 2A or type 2B
        memory windows. It can set neither to indicate it doesn't support
        type 2 windows at all.
      
      * modify existing provides and consumers code to the new param of
        ib_alloc_mw and the ib_mw_bind_info structure
      Signed-off-by: NHaggai Eran <haggaie@mellanox.com>
      Signed-off-by: NShani Michaeli <shanim@mellanox.com>
      Signed-off-by: NOr Gerlitz <ogerlitz@mellanox.com>
      Signed-off-by: NRoland Dreier <roland@purestorage.com>
      7083e42e
  2. 21 3月, 2012 1 次提交
  3. 07 6月, 2011 1 次提交
  4. 26 5月, 2011 1 次提交
    • S
      RDMA/cma: Pass QP type into rdma_create_id() · b26f9b99
      Sean Hefty 提交于
      The RDMA CM currently infers the QP type from the port space selected
      by the user.  In the future (eg with RDMA_PS_IB or XRC), there may not
      be a 1-1 correspondence between port space and QP type.  For netlink
      export of RDMA CM state, we want to export the QP type to userspace,
      so it is cleaner to explicitly associate a QP type to an ID.
      
      Modify rdma_create_id() to allow the user to specify the QP type, and
      use it to make our selections of datagram versus connected mode.
      Signed-off-by: NSean Hefty <sean.hefty@intel.com>
      Signed-off-by: NRoland Dreier <roland@purestorage.com>
      b26f9b99
  5. 16 3月, 2011 1 次提交
  6. 12 3月, 2011 1 次提交
    • T
      RPCRDMA: Fix FRMR registration/invalidate handling. · 5c635e09
      Tom Tucker 提交于
      When the rpc_memreg_strategy is 5, FRMR are used to map RPC data.
      This mode uses an FRMR to map the RPC data, then invalidates
      (i.e. unregisers) the data in xprt_rdma_free. These FRMR are used
      across connections on the same mount, i.e. if the connection goes
      away on an idle timeout and reconnects later, the FRMR are not
      destroyed and recreated.
      
      This creates a problem for transport errors because the WR that
      invalidate an FRMR may be flushed (i.e. fail) leaving the
      FRMR valid. When the FRMR is later used to map an RPC it will fail,
      tearing down the transport and starting over. Over time, more and
      more of the FRMR pool end up in the wrong state resulting in
      seemingly random disconnects.
      
      This fix keeps track of the FRMR state explicitly by setting it's
      state based on the successful completion of a reg/inv WR. If the FRMR
      is ever used and found to be in the wrong state, an invalidate WR
      is prepended, re-syncing the FRMR state and avoiding the connection loss.
      Signed-off-by: NTom Tucker <tom@ogc.us>
      Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
      5c635e09
  7. 12 8月, 2010 2 次提交
  8. 30 3月, 2010 1 次提交
    • T
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking... · 5a0e3ad6
      Tejun Heo 提交于
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
      
      percpu.h is included by sched.h and module.h and thus ends up being
      included when building most .c files.  percpu.h includes slab.h which
      in turn includes gfp.h making everything defined by the two files
      universally available and complicating inclusion dependencies.
      
      percpu.h -> slab.h dependency is about to be removed.  Prepare for
      this change by updating users of gfp and slab facilities include those
      headers directly instead of assuming availability.  As this conversion
      needs to touch large number of source files, the following script is
      used as the basis of conversion.
      
        http://userweb.kernel.org/~tj/misc/slabh-sweep.py
      
      The script does the followings.
      
      * Scan files for gfp and slab usages and update includes such that
        only the necessary includes are there.  ie. if only gfp is used,
        gfp.h, if slab is used, slab.h.
      
      * When the script inserts a new include, it looks at the include
        blocks and try to put the new include such that its order conforms
        to its surrounding.  It's put in the include block which contains
        core kernel includes, in the same order that the rest are ordered -
        alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
        doesn't seem to be any matching order.
      
      * If the script can't find a place to put a new include (mostly
        because the file doesn't have fitting include block), it prints out
        an error message indicating which .h file needs to be added to the
        file.
      
      The conversion was done in the following steps.
      
      1. The initial automatic conversion of all .c files updated slightly
         over 4000 files, deleting around 700 includes and adding ~480 gfp.h
         and ~3000 slab.h inclusions.  The script emitted errors for ~400
         files.
      
      2. Each error was manually checked.  Some didn't need the inclusion,
         some needed manual addition while adding it to implementation .h or
         embedding .c file was more appropriate for others.  This step added
         inclusions to around 150 files.
      
      3. The script was run again and the output was compared to the edits
         from #2 to make sure no file was left behind.
      
      4. Several build tests were done and a couple of problems were fixed.
         e.g. lib/decompress_*.c used malloc/free() wrappers around slab
         APIs requiring slab.h to be added manually.
      
      5. The script was run on all .h files but without automatically
         editing them as sprinkling gfp.h and slab.h inclusions around .h
         files could easily lead to inclusion dependency hell.  Most gfp.h
         inclusion directives were ignored as stuff from gfp.h was usually
         wildly available and often used in preprocessor macros.  Each
         slab.h inclusion directive was examined and added manually as
         necessary.
      
      6. percpu.h was updated not to include slab.h.
      
      7. Build test were done on the following configurations and failures
         were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
         distributed build env didn't work with gcov compiles) and a few
         more options had to be turned off depending on archs to make things
         build (like ipr on powerpc/64 which failed due to missing writeq).
      
         * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
         * powerpc and powerpc64 SMP allmodconfig
         * sparc and sparc64 SMP allmodconfig
         * ia64 SMP allmodconfig
         * s390 SMP allmodconfig
         * alpha SMP allmodconfig
         * um on x86_64 SMP allmodconfig
      
      8. percpu.h modifications were reverted so that it could be applied as
         a separate patch and serve as bisection point.
      
      Given the fact that I had only a couple of failures from tests on step
      6, I'm fairly confident about the coverage of this conversion patch.
      If there is a breakage, it's likely to be something in one of the arch
      headers which should be easily discoverable easily on most builds of
      the specific arch.
      Signed-off-by: NTejun Heo <tj@kernel.org>
      Guess-its-ok-by: NChristoph Lameter <cl@linux-foundation.org>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
      5a0e3ad6
  9. 30 11月, 2009 1 次提交
  10. 27 5月, 2009 1 次提交
  11. 26 11月, 2008 1 次提交
  12. 31 10月, 2008 1 次提交
  13. 11 10月, 2008 9 次提交
  14. 17 4月, 2008 1 次提交
    • R
      IB/core: Add support for "send with invalidate" work requests · 0f39cf3d
      Roland Dreier 提交于
      Add a new IB_WR_SEND_WITH_INV send opcode that can be used to mark a
      "send with invalidate" work request as defined in the iWARP verbs and
      the InfiniBand base memory management extensions.  Also put "imm_data"
      and a new "invalidate_rkey" member in a new "ex" union in struct
      ib_send_wr. The invalidate_rkey member can be used to pass in an
      R_Key/STag to be invalidated.  Add this new union to struct
      ib_uverbs_send_wr.  Add code to copy the invalidate_rkey field in
      ib_uverbs_post_send().
      
      Fix up low-level drivers to deal with the change to struct ib_send_wr,
      and just remove the imm_data initialization from net/sunrpc/xprtrdma/,
      since that code never does any send with immediate operations.
      
      Also, move the existing IB_DEVICE_SEND_W_INV flag to a new bit, since
      the iWARP drivers currently in the tree set the bit.  The amso1100
      driver at least will silently fail to honor the IB_SEND_INVALIDATE bit
      if passed in as part of userspace send requests (since it does not
      implement kernel bypass work request queueing).  Remove the flag from
      all existing drivers that set it until we know which ones are OK.
      
      The values chosen for the new flag is not consecutive to avoid clashing
      with flags defined in the XRC patches, which are not merged yet but
      which are already in use and are likely to be merged soon.
      
      This resurrects a patch sent long ago by Mikkel Hagen <mhagen@iol.unh.edu>.
      Signed-off-by: NRoland Dreier <rolandd@cisco.com>
      0f39cf3d
  15. 30 1月, 2008 1 次提交
  16. 17 10月, 2007 1 次提交
  17. 10 10月, 2007 2 次提交