linux/drivers/infiniband/core/smi.h
Hal Rosenstock 1bae4dbf95 IB/mad: Enhance SMI for switch support
Extend the SMI with switch (intermediate hop) support. Care has been
taken to ensure that the CA (and router) code paths are changed as
little as possible.

Signed-off-by: Suresh Shelvapille <suri@baymicrosystems.com>
Signed-off-by: Hal Rosenstock <halr@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-09 16:17:32 -07:00

75 lines
2.8 KiB
C

/*
* Copyright (c) 2004 Mellanox Technologies Ltd. All rights reserved.
* Copyright (c) 2004 Infinicon Corporation. All rights reserved.
* Copyright (c) 2004 Intel Corporation. All rights reserved.
* Copyright (c) 2004 Topspin Corporation. All rights reserved.
* Copyright (c) 2004-2007 Voltaire Corporation. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#ifndef __SMI_H_
#define __SMI_H_
#include <rdma/ib_smi.h>
enum smi_action {
IB_SMI_DISCARD,
IB_SMI_HANDLE
};
enum smi_forward_action {
IB_SMI_LOCAL, /* SMP should be completed up the stack */
IB_SMI_SEND, /* received DR SMP should be forwarded to the send queue */
IB_SMI_FORWARD /* SMP should be forwarded (for switches only) */
};
enum smi_action smi_handle_dr_smp_recv(struct ib_smp *smp, u8 node_type,
int port_num, int phys_port_cnt);
int smi_get_fwd_port(struct ib_smp *smp);
extern enum smi_forward_action smi_check_forward_dr_smp(struct ib_smp *smp);
extern enum smi_action smi_handle_dr_smp_send(struct ib_smp *smp,
u8 node_type, int port_num);
/*
* Return 1 if the SMP should be handled by the local SMA/SM via process_mad
*/
static inline enum smi_action smi_check_local_smp(struct ib_smp *smp,
struct ib_device *device)
{
/* C14-9:3 -- We're at the end of the DR segment of path */
/* C14-9:4 -- Hop Pointer = Hop Count + 1 -> give to SMA/SM */
return ((device->process_mad &&
!ib_get_smp_direction(smp) &&
(smp->hop_ptr == smp->hop_cnt + 1)) ?
IB_SMI_HANDLE : IB_SMI_DISCARD);
}
#endif /* __SMI_H_ */