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
  52 extern uint aspm_mode;
  53
  54 enum 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
  60 void aspm_init(struct hfi1_devdata *dd);
  61 void aspm_exit(struct hfi1_devdata *dd);
  62 void aspm_hw_disable_l1(struct hfi1_devdata *dd);
  63 void __aspm_ctx_disable(struct hfi1_ctxtdata *rcd);
  64 void aspm_disable_all(struct hfi1_devdata *dd);
  65 void aspm_enable_all(struct hfi1_devdata *dd);
  66
  67 static 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 */