cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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smi.h (3349B)

      1/*
      2 * Copyright (c) 2004 Mellanox Technologies Ltd.  All rights reserved.
      3 * Copyright (c) 2004 Infinicon Corporation.  All rights reserved.
      4 * Copyright (c) 2004 Intel Corporation.  All rights reserved.
      5 * Copyright (c) 2004 Topspin Corporation.  All rights reserved.
      6 * Copyright (c) 2004-2007 Voltaire Corporation.  All rights reserved.
      7 *
      8 * This software is available to you under a choice of one of two
      9 * licenses.  You may choose to be licensed under the terms of the GNU
     10 * General Public License (GPL) Version 2, available from the file
     11 * COPYING in the main directory of this source tree, or the
     12 * OpenIB.org BSD license below:
     13 *
     14 *     Redistribution and use in source and binary forms, with or
     15 *     without modification, are permitted provided that the following
     16 *     conditions are met:
     17 *
     18 *      - Redistributions of source code must retain the above
     19 *        copyright notice, this list of conditions and the following
     20 *        disclaimer.
     21 *
     22 *      - Redistributions in binary form must reproduce the above
     23 *        copyright notice, this list of conditions and the following
     24 *        disclaimer in the documentation and/or other materials
     25 *        provided with the distribution.
     26 *
     27 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     28 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     29 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     30 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
     31 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
     32 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
     33 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     34 * SOFTWARE.
     35 *
     36 */
     37
     38#ifndef __SMI_H_
     39#define __SMI_H_
     40
     41#include <rdma/ib_smi.h>
     42
     43enum smi_action {
     44	IB_SMI_DISCARD,
     45	IB_SMI_HANDLE
     46};
     47
     48enum smi_forward_action {
     49	IB_SMI_LOCAL,	/* SMP should be completed up the stack */
     50	IB_SMI_SEND,	/* received DR SMP should be forwarded to the send queue */
     51	IB_SMI_FORWARD	/* SMP should be forwarded (for switches only) */
     52};
     53
     54enum smi_action smi_handle_dr_smp_recv(struct ib_smp *smp, bool is_switch,
     55				       u32 port_num, int phys_port_cnt);
     56int smi_get_fwd_port(struct ib_smp *smp);
     57extern enum smi_forward_action smi_check_forward_dr_smp(struct ib_smp *smp);
     58extern enum smi_action smi_handle_dr_smp_send(struct ib_smp *smp,
     59					      bool is_switch, u32 port_num);
     60
     61/*
     62 * Return IB_SMI_HANDLE if the SMP should be handled by the local SMA/SM
     63 * via process_mad
     64 */
     65static inline enum smi_action smi_check_local_smp(struct ib_smp *smp,
     66						  struct ib_device *device)
     67{
     68	/* C14-9:3 -- We're at the end of the DR segment of path */
     69	/* C14-9:4 -- Hop Pointer = Hop Count + 1 -> give to SMA/SM */
     70	return ((device->ops.process_mad &&
     71		!ib_get_smp_direction(smp) &&
     72		(smp->hop_ptr == smp->hop_cnt + 1)) ?
     73		IB_SMI_HANDLE : IB_SMI_DISCARD);
     74}
     75
     76/*
     77 * Return IB_SMI_HANDLE if the SMP should be handled by the local SMA/SM
     78 * via process_mad
     79 */
     80static inline enum smi_action smi_check_local_returning_smp(struct ib_smp *smp,
     81						   struct ib_device *device)
     82{
     83	/* C14-13:3 -- We're at the end of the DR segment of path */
     84	/* C14-13:4 -- Hop Pointer == 0 -> give to SM */
     85	return ((device->ops.process_mad &&
     86		ib_get_smp_direction(smp) &&
     87		!smp->hop_ptr) ? IB_SMI_HANDLE : IB_SMI_DISCARD);
     88}
     89
     90#endif	/* __SMI_H_ */