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>
70 lines
2.6 KiB
C
70 lines
2.6 KiB
C
/*
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* Copyright (c) 2004 Mellanox Technologies Ltd. All rights reserved.
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* Copyright (c) 2004 Infinicon Corporation. All rights reserved.
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* Copyright (c) 2004 Intel Corporation. All rights reserved.
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* Copyright (c) 2004 Topspin Corporation. All rights reserved.
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* Copyright (c) 2004 Voltaire Corporation. 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: smi.h 1389 2004-12-27 22:56:47Z roland $
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*/
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#ifndef __SMI_H_
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#define __SMI_H_
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#include <rdma/ib_smi.h>
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int smi_handle_dr_smp_recv(struct ib_smp *smp,
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u8 node_type,
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int port_num,
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int phys_port_cnt);
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extern int smi_check_forward_dr_smp(struct ib_smp *smp);
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extern int smi_handle_dr_smp_send(struct ib_smp *smp,
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u8 node_type,
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int port_num);
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extern int smi_check_local_dr_smp(struct ib_smp *smp,
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struct ib_device *device,
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int port_num);
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/*
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* Return 1 if the SMP should be handled by the local SMA/SM via process_mad
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*/
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static inline int smi_check_local_smp(struct ib_mad_agent *mad_agent,
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struct ib_smp *smp)
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{
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/* C14-9:3 -- We're at the end of the DR segment of path */
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/* C14-9:4 -- Hop Pointer = Hop Count + 1 -> give to SMA/SM */
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return ((mad_agent->device->process_mad &&
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!ib_get_smp_direction(smp) &&
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(smp->hop_ptr == smp->hop_cnt + 1)));
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}
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#endif /* __SMI_H_ */
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