LXR linux/drivers/infiniband/hw/hfi1/aspm.h

   1/*
   2 * Copyright(c) 2015-2017 Intel Corporation.
   3 *
   4 * This file is provided under a dual BSD/GPLv2 license.  When using or
   5 * redistributing this file, you may do so under either license.
   6 *
   7 * GPL LICENSE SUMMARY
   8 *
   9 * This program is free software; you can redistribute it and/or modify
  10 * it under the terms of version 2 of the GNU General Public License as
  11 * published by the Free Software Foundation.
  12 *
  13 * This program is distributed in the hope that it will be useful, but
  14 * WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 * General Public License for more details.
  17 *
  18 * BSD LICENSE
  19 *
  20 * Redistribution and use in source and binary forms, with or without
  21 * modification, are permitted provided that the following conditions
  22 * are met:
  23 *
  24 *  - Redistributions of source code must retain the above copyright
  25 *    notice, this list of conditions and the following disclaimer.
  26 *  - Redistributions in binary form must reproduce the above copyright
  27 *    notice, this list of conditions and the following disclaimer in
  28 *    the documentation and/or other materials provided with the
  29 *    distribution.
  30 *  - Neither the name of Intel Corporation nor the names of its
  31 *    contributors may be used to endorse or promote products derived
  32 *    from this software without specific prior written permission.
  33 *
  34 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  35 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  36 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  37 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  38 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  39 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  40 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  41 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  42 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  43 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  44 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  45 *
  46 */
  47#ifndef _ASPM_H
  48#define _ASPM_H
  49
  50#include "hfi.h"
  51
  52extern uint aspm_mode;
  53
  54enum aspm_mode {
  55        ASPM_MODE_DISABLED = 0, /* ASPM always disabled, performance mode */
  56        ASPM_MODE_ENABLED = 1,  /* ASPM always enabled, power saving mode */
  57        ASPM_MODE_DYNAMIC = 2,  /* ASPM enabled/disabled dynamically */
  58};
  59
  60void aspm_init(struct hfi1_devdata *dd);
  61void aspm_exit(struct hfi1_devdata *dd);
  62void aspm_hw_disable_l1(struct hfi1_devdata *dd);
  63void __aspm_ctx_disable(struct hfi1_ctxtdata *rcd);
  64void aspm_disable_all(struct hfi1_devdata *dd);
  65void aspm_enable_all(struct hfi1_devdata *dd);
  66
  67static inline void aspm_ctx_disable(struct hfi1_ctxtdata *rcd)
  68{
  69        /* Quickest exit for minimum impact */
  70        if (likely(!rcd->aspm_intr_supported))
  71                return;
  72
  73        __aspm_ctx_disable(rcd);
  74}
  75
  76#endif /* _ASPM_H */
  77