forked from Minki/linux
34816ad98e
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>
61 lines
2.1 KiB
C
61 lines
2.1 KiB
C
/*
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* Copyright (c) 2005 Intel Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* $Id: mad_rmpp.h 1921 2005-02-25 22:58:44Z sean.hefty $
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*/
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#ifndef __MAD_RMPP_H__
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#define __MAD_RMPP_H__
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enum {
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IB_RMPP_RESULT_PROCESSED,
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IB_RMPP_RESULT_CONSUMED,
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IB_RMPP_RESULT_INTERNAL,
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IB_RMPP_RESULT_UNHANDLED
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};
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int ib_send_rmpp_mad(struct ib_mad_send_wr_private *mad_send_wr);
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struct ib_mad_recv_wc *
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ib_process_rmpp_recv_wc(struct ib_mad_agent_private *agent,
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struct ib_mad_recv_wc *mad_recv_wc);
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int ib_process_rmpp_send_wc(struct ib_mad_send_wr_private *mad_send_wr,
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struct ib_mad_send_wc *mad_send_wc);
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void ib_rmpp_send_handler(struct ib_mad_send_wc *mad_send_wc);
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void ib_cancel_rmpp_recvs(struct ib_mad_agent_private *agent);
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int ib_retry_rmpp(struct ib_mad_send_wr_private *mad_send_wr);
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#endif /* __MAD_RMPP_H__ */
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