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
aspm_ctx_disable(struct hfi1_ctxtdata * rcd)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 */
77