1 /**
2 * Copyright © 2017 IBM Corporation
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 #include "config.h"
17
18 #include "pgood_monitor.hpp"
19
20 #include "elog-errors.hpp"
21 #include "utility.hpp"
22
23 #include <org/open_power/Witherspoon/Fault/error.hpp>
24 #include <phosphor-logging/log.hpp>
25
26 namespace witherspoon
27 {
28 namespace power
29 {
30
31 constexpr auto POWER_OBJ_PATH = "/org/openbmc/control/power0";
32 constexpr auto POWER_INTERFACE = "org.openbmc.control.Power";
33
34 using namespace phosphor::logging;
35 using namespace sdbusplus::org::open_power::Witherspoon::Fault::Error;
36
pgoodPending()37 bool PGOODMonitor::pgoodPending()
38 {
39 bool pending = false;
40 int32_t state = 0;
41 int32_t pgood = 0;
42
43 auto service = util::getService(POWER_OBJ_PATH, POWER_INTERFACE, bus);
44
45 util::getProperty<int32_t>(POWER_INTERFACE, "pgood", POWER_OBJ_PATH,
46 service, bus, pgood);
47
48 // When state = 1, system was switched on
49 util::getProperty<int32_t>(POWER_INTERFACE, "state", POWER_OBJ_PATH,
50 service, bus, state);
51
52 // On but no PGOOD
53 if (state && !pgood)
54 {
55 pending = true;
56 }
57
58 return pending;
59 }
60
analyze()61 void PGOODMonitor::analyze()
62 {
63 // Timer callback.
64 // The timer expired before it was stopped.
65 // If PGOOD is still pending (it should be),
66 // then there is a real failure.
67
68 if (pgoodPending())
69 {
70 #ifdef UCD90160_DEVICE_ACCESS
71 device->onFailure();
72 #endif
73 report<PowerOnFailure>();
74 }
75
76 // The pgood-wait service (with a longer timeout)
77 // will handle powering off the system.
78 timer.get_event().exit(EXIT_SUCCESS);
79 }
80
propertyChanged()81 void PGOODMonitor::propertyChanged()
82 {
83 // Multiple properties could have changed here.
84 // Keep things simple and just recheck the important ones.
85 if (!pgoodPending())
86 {
87 // PGOOD is on, or system is off, so we are done.
88 timer.get_event().exit(EXIT_SUCCESS);
89 }
90 }
91
startListening()92 void PGOODMonitor::startListening()
93 {
94 match = std::make_unique<sdbusplus::bus::match_t>(
95 bus,
96 sdbusplus::bus::match::rules::propertiesChanged(POWER_OBJ_PATH,
97 POWER_INTERFACE),
98 [this](auto&) { this->propertyChanged(); });
99 }
100
run()101 int PGOODMonitor::run()
102 {
103 try
104 {
105 startListening();
106
107 // If PGOOD came up before we got here, we're done.
108 // Otherwise if PGOOD doesn't get asserted before
109 // the timer expires, it's a failure.
110 if (!pgoodPending())
111 {
112 return EXIT_SUCCESS;
113 }
114
115 return timer.get_event().loop();
116 }
117 catch (std::exception& e)
118 {
119 log<level::ERR>(e.what());
120 log<level::ERR>("Unexpected failure prevented PGOOD checking");
121 }
122
123 // Letting the service fail won't help anything, so don't do it.
124 return EXIT_SUCCESS;
125 }
126
127 } // namespace power
128 } // namespace witherspoon
129