Jason M. Bills | 778ac17 | 2020-12-04 16:37:11 -0800 | [diff] [blame] | 1 | /* |
| 2 | // Copyright (c) 2021 Intel 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 | #pragma once |
| 17 | #include <boost/asio/posix/stream_descriptor.hpp> |
| 18 | #include <boost/asio/steady_timer.hpp> |
| 19 | #include <error_monitors/base_monitor.hpp> |
| 20 | #include <gpiod.hpp> |
| 21 | #include <host_error_monitor.hpp> |
| 22 | #include <sdbusplus/asio/object_server.hpp> |
| 23 | |
| 24 | #include <iostream> |
| 25 | |
| 26 | namespace host_error_monitor::base_gpio_poll_monitor |
| 27 | { |
| 28 | static constexpr bool debug = false; |
| 29 | |
| 30 | enum class AssertValue |
| 31 | { |
| 32 | lowAssert = 0, |
| 33 | highAssert = 1, |
| 34 | }; |
| 35 | |
| 36 | class BaseGPIOPollMonitor : public host_error_monitor::base_monitor::BaseMonitor |
| 37 | { |
| 38 | AssertValue assertValue; |
| 39 | size_t pollingTimeMs; |
| 40 | size_t timeoutMs; |
| 41 | |
| 42 | boost::asio::steady_timer pollingTimer; |
| 43 | std::chrono::steady_clock::time_point timeoutTime; |
| 44 | |
| 45 | gpiod::line line; |
| 46 | boost::asio::posix::stream_descriptor event; |
| 47 | |
| 48 | virtual void logEvent() |
| 49 | {} |
| 50 | |
| 51 | bool requestEvents() |
| 52 | { |
| 53 | line = gpiod::find_line(signalName); |
| 54 | if (!line) |
| 55 | { |
| 56 | std::cerr << "Failed to find the " << signalName << " line\n"; |
| 57 | return false; |
| 58 | } |
| 59 | |
| 60 | try |
| 61 | { |
| 62 | line.request( |
| 63 | {"host-error-monitor", gpiod::line_request::EVENT_BOTH_EDGES}); |
| 64 | } |
| 65 | catch (std::exception&) |
| 66 | { |
| 67 | std::cerr << "Failed to request events for " << signalName << "\n"; |
| 68 | return false; |
| 69 | } |
| 70 | |
| 71 | int lineFd = line.event_get_fd(); |
| 72 | if (lineFd < 0) |
| 73 | { |
| 74 | std::cerr << "Failed to get " << signalName << " fd\n"; |
| 75 | return false; |
| 76 | } |
| 77 | |
| 78 | event.assign(lineFd); |
| 79 | |
| 80 | return true; |
| 81 | } |
| 82 | |
| 83 | bool asserted() |
| 84 | { |
| 85 | if constexpr (debug) |
| 86 | { |
| 87 | std::cerr << "Checking " << signalName << " state\n"; |
| 88 | } |
| 89 | |
| 90 | if (hostIsOff()) |
| 91 | { |
| 92 | if constexpr (debug) |
| 93 | { |
| 94 | std::cerr << "Host is off\n"; |
| 95 | } |
| 96 | return false; |
| 97 | } |
| 98 | |
| 99 | return (line.get_value() == static_cast<int>(assertValue)); |
| 100 | } |
| 101 | |
| 102 | public: |
| 103 | virtual void assertHandler() |
| 104 | { |
| 105 | std::cerr << signalName << " asserted for " << std::to_string(timeoutMs) |
| 106 | << " ms\n"; |
| 107 | logEvent(); |
| 108 | } |
| 109 | |
| 110 | virtual void deassertHandler() |
| 111 | {} |
| 112 | |
| 113 | private: |
| 114 | void flushEvents() |
| 115 | { |
| 116 | if constexpr (debug) |
| 117 | { |
| 118 | std::cerr << "Flushing " << signalName << " events\n"; |
| 119 | } |
| 120 | |
| 121 | while (true) |
| 122 | { |
| 123 | try |
| 124 | { |
| 125 | line.event_read(); |
| 126 | } |
| 127 | catch (std::system_error) |
| 128 | { |
| 129 | break; |
| 130 | } |
| 131 | } |
| 132 | } |
| 133 | |
| 134 | void waitForEvent() |
| 135 | { |
| 136 | if constexpr (debug) |
| 137 | { |
| 138 | std::cerr << "Wait for " << signalName << "\n"; |
| 139 | } |
| 140 | |
| 141 | event.async_wait( |
| 142 | boost::asio::posix::stream_descriptor::wait_read, |
| 143 | [this](const boost::system::error_code ec) { |
| 144 | if (ec) |
| 145 | { |
| 146 | // operation_aborted is expected if wait is canceled. |
| 147 | if (ec != boost::asio::error::operation_aborted) |
| 148 | { |
| 149 | std::cerr << signalName |
| 150 | << " wait error: " << ec.message() << "\n"; |
| 151 | } |
| 152 | return; |
| 153 | } |
| 154 | |
| 155 | if constexpr (debug) |
| 156 | { |
| 157 | std::cerr << signalName << " event ready\n"; |
| 158 | } |
| 159 | |
| 160 | startPolling(); |
| 161 | }); |
| 162 | } |
| 163 | |
| 164 | public: |
| 165 | virtual void startPolling() |
| 166 | { |
| 167 | timeoutTime = std::chrono::steady_clock::now() + |
| 168 | std::chrono::duration<int, std::milli>(timeoutMs); |
| 169 | poll(); |
| 170 | } |
| 171 | |
| 172 | private: |
| 173 | void poll() |
| 174 | { |
| 175 | if constexpr (debug) |
| 176 | { |
| 177 | std::cerr << "Polling " << signalName << "\n"; |
| 178 | } |
| 179 | |
| 180 | flushEvents(); |
| 181 | |
| 182 | if (!asserted()) |
| 183 | { |
| 184 | if constexpr (debug) |
| 185 | { |
| 186 | std::cerr << signalName << " not asserted\n"; |
| 187 | } |
| 188 | |
| 189 | deassertHandler(); |
| 190 | waitForEvent(); |
| 191 | return; |
| 192 | } |
| 193 | if constexpr (debug) |
| 194 | { |
| 195 | std::cerr << signalName << " asserted\n"; |
| 196 | } |
| 197 | |
| 198 | if (std::chrono::steady_clock::now() > timeoutTime) |
| 199 | { |
| 200 | assertHandler(); |
| 201 | waitForEvent(); |
| 202 | return; |
| 203 | } |
| 204 | |
| 205 | pollingTimer.expires_after(std::chrono::milliseconds(pollingTimeMs)); |
| 206 | pollingTimer.async_wait([this](const boost::system::error_code ec) { |
| 207 | if (ec) |
| 208 | { |
| 209 | // operation_aborted is expected if timer is canceled before |
| 210 | // completion. |
| 211 | if (ec != boost::asio::error::operation_aborted) |
| 212 | { |
| 213 | std::cerr << signalName |
| 214 | << " polling async_wait failed: " << ec.message() |
| 215 | << "\n"; |
| 216 | } |
| 217 | return; |
| 218 | } |
| 219 | poll(); |
| 220 | }); |
| 221 | } |
| 222 | |
| 223 | public: |
Ed Tanous | ee00ccc | 2023-03-01 10:37:43 -0800 | [diff] [blame^] | 224 | BaseGPIOPollMonitor(boost::asio::io_context& io, |
Jason M. Bills | 778ac17 | 2020-12-04 16:37:11 -0800 | [diff] [blame] | 225 | std::shared_ptr<sdbusplus::asio::connection> conn, |
| 226 | const std::string& signalName, AssertValue assertValue, |
| 227 | size_t pollingTimeMs, size_t timeoutMs) : |
| 228 | BaseMonitor(io, conn, signalName), |
| 229 | pollingTimer(io), event(io), assertValue(assertValue), |
| 230 | pollingTimeMs(pollingTimeMs), timeoutMs(timeoutMs) |
| 231 | { |
| 232 | if (!requestEvents()) |
| 233 | { |
| 234 | return; |
| 235 | } |
| 236 | event.non_blocking(true); |
| 237 | valid = true; |
| 238 | } |
| 239 | |
| 240 | void hostOn() override |
| 241 | { |
| 242 | event.cancel(); |
| 243 | startPolling(); |
| 244 | } |
| 245 | |
| 246 | size_t getTimeoutMs() |
| 247 | { |
| 248 | return timeoutMs; |
| 249 | } |
| 250 | |
| 251 | void setTimeoutMs(size_t newTimeoutMs) |
| 252 | { |
| 253 | timeoutMs = newTimeoutMs; |
| 254 | } |
| 255 | }; |
| 256 | } // namespace host_error_monitor::base_gpio_poll_monitor |