Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 1 | #include <sys/epoll.h> |
| 2 | #include <sys/eventfd.h> |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 3 | #include <sys/poll.h> |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 4 | |
| 5 | #include <algorithm> |
| 6 | #include <atomic> |
| 7 | #include <thread> |
| 8 | |
Fan Xu | 74df490 | 2018-09-20 16:40:51 -0700 | [diff] [blame] | 9 | #include <log/log.h> |
Fan Xu | 74df490 | 2018-09-20 16:40:51 -0700 | [diff] [blame] | 10 | #include <private/dvr/buffer_channel.h> |
Tianyu | 0c6b7ff | 2018-10-03 11:30:04 -0700 | [diff] [blame] | 11 | #include <private/dvr/bufferhub_rpc.h> |
Fan Xu | 74df490 | 2018-09-20 16:40:51 -0700 | [diff] [blame] | 12 | #include <private/dvr/consumer_channel.h> |
| 13 | #include <private/dvr/producer_channel.h> |
| 14 | #include <sync/sync.h> |
| 15 | #include <utils/Trace.h> |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 16 | |
| 17 | using android::pdx::BorrowedHandle; |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 18 | using android::pdx::ErrorStatus; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 19 | using android::pdx::Message; |
| 20 | using android::pdx::RemoteChannelHandle; |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 21 | using android::pdx::Status; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 22 | using android::pdx::rpc::BufferWrapper; |
| 23 | using android::pdx::rpc::DispatchRemoteMethod; |
| 24 | using android::pdx::rpc::WrapBuffer; |
| 25 | |
| 26 | namespace android { |
| 27 | namespace dvr { |
| 28 | |
Jiwen 'Steve' Cai | 0728fa9 | 2018-04-24 19:03:14 -0700 | [diff] [blame] | 29 | ProducerChannel::ProducerChannel(BufferHubService* service, int buffer_id, |
| 30 | int channel_id, IonBuffer buffer, |
| 31 | IonBuffer metadata_buffer, |
| 32 | size_t user_metadata_size, int* error) |
| 33 | : BufferHubChannel(service, buffer_id, channel_id, kProducerType), |
| 34 | buffer_(std::move(buffer)), |
| 35 | metadata_buffer_(std::move(metadata_buffer)), |
| 36 | user_metadata_size_(user_metadata_size), |
| 37 | metadata_buf_size_(BufferHubDefs::kMetadataHeaderSize + |
| 38 | user_metadata_size) { |
| 39 | if (!buffer_.IsValid()) { |
| 40 | ALOGE("ProducerChannel::ProducerChannel: Invalid buffer."); |
| 41 | *error = -EINVAL; |
| 42 | return; |
| 43 | } |
| 44 | if (!metadata_buffer_.IsValid()) { |
| 45 | ALOGE("ProducerChannel::ProducerChannel: Invalid metadata buffer."); |
| 46 | *error = -EINVAL; |
| 47 | return; |
| 48 | } |
| 49 | |
| 50 | *error = InitializeBuffer(); |
| 51 | } |
| 52 | |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 53 | ProducerChannel::ProducerChannel(BufferHubService* service, int channel_id, |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 54 | uint32_t width, uint32_t height, |
Hendrik Wagenaar | 108e84f | 2017-05-07 22:19:17 -0700 | [diff] [blame] | 55 | uint32_t layer_count, uint32_t format, |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 56 | uint64_t usage, size_t user_metadata_size, |
Hendrik Wagenaar | 108e84f | 2017-05-07 22:19:17 -0700 | [diff] [blame] | 57 | int* error) |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 58 | : BufferHubChannel(service, channel_id, channel_id, kProducerType), |
| 59 | pending_consumers_(0), |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 60 | producer_owns_(true), |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 61 | user_metadata_size_(user_metadata_size), |
| 62 | metadata_buf_size_(BufferHubDefs::kMetadataHeaderSize + |
| 63 | user_metadata_size) { |
| 64 | if (int ret = buffer_.Alloc(width, height, layer_count, format, usage)) { |
Hendrik Wagenaar | 4d3590f | 2017-05-06 22:36:04 -0700 | [diff] [blame] | 65 | ALOGE("ProducerChannel::ProducerChannel: Failed to allocate buffer: %s", |
| 66 | strerror(-ret)); |
| 67 | *error = ret; |
| 68 | return; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 69 | } |
| 70 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 71 | if (int ret = metadata_buffer_.Alloc(metadata_buf_size_, /*height=*/1, |
| 72 | /*layer_count=*/1, |
| 73 | BufferHubDefs::kMetadataFormat, |
| 74 | BufferHubDefs::kMetadataUsage)) { |
| 75 | ALOGE("ProducerChannel::ProducerChannel: Failed to allocate metadata: %s", |
| 76 | strerror(-ret)); |
| 77 | *error = ret; |
| 78 | return; |
| 79 | } |
| 80 | |
Jiwen 'Steve' Cai | 0728fa9 | 2018-04-24 19:03:14 -0700 | [diff] [blame] | 81 | *error = InitializeBuffer(); |
| 82 | } |
| 83 | |
| 84 | int ProducerChannel::InitializeBuffer() { |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 85 | void* metadata_ptr = nullptr; |
| 86 | if (int ret = metadata_buffer_.Lock(BufferHubDefs::kMetadataUsage, /*x=*/0, |
| 87 | /*y=*/0, metadata_buf_size_, |
| 88 | /*height=*/1, &metadata_ptr)) { |
| 89 | ALOGE("ProducerChannel::ProducerChannel: Failed to lock metadata."); |
Jiwen 'Steve' Cai | 0728fa9 | 2018-04-24 19:03:14 -0700 | [diff] [blame] | 90 | return ret; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 91 | } |
| 92 | metadata_header_ = |
| 93 | reinterpret_cast<BufferHubDefs::MetadataHeader*>(metadata_ptr); |
| 94 | |
| 95 | // Using placement new here to reuse shared memory instead of new allocation |
| 96 | // and also initialize the value to zero. |
| 97 | buffer_state_ = |
| 98 | new (&metadata_header_->buffer_state) std::atomic<uint64_t>(0); |
Tianyu | 0c6b7ff | 2018-10-03 11:30:04 -0700 | [diff] [blame] | 99 | fence_state_ = new (&metadata_header_->fence_state) std::atomic<uint64_t>(0); |
Tianyu | 6705349 | 2018-10-04 14:00:22 -0700 | [diff] [blame] | 100 | active_clients_bit_mask_ = |
| 101 | new (&metadata_header_->active_clients_bit_mask) std::atomic<uint64_t>(0); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 102 | |
Tianyu Jiang | 63dd7c3 | 2018-10-30 18:35:06 -0700 | [diff] [blame] | 103 | // Producer channel is never created after consumer channel, and one buffer |
| 104 | // only have one fixed producer for now. Thus, it is correct to assume |
| 105 | // producer state bit is kFirstClientBitMask for now. |
| 106 | active_clients_bit_mask_->store(BufferHubDefs::kFirstClientBitMask, |
| 107 | std::memory_order_release); |
| 108 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 109 | acquire_fence_fd_.Reset(epoll_create1(EPOLL_CLOEXEC)); |
| 110 | release_fence_fd_.Reset(epoll_create1(EPOLL_CLOEXEC)); |
| 111 | if (!acquire_fence_fd_ || !release_fence_fd_) { |
| 112 | ALOGE("ProducerChannel::ProducerChannel: Failed to create shared fences."); |
Jiwen 'Steve' Cai | 0728fa9 | 2018-04-24 19:03:14 -0700 | [diff] [blame] | 113 | return -EIO; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 114 | } |
| 115 | |
| 116 | dummy_fence_fd_.Reset(eventfd(0, EFD_CLOEXEC | EFD_NONBLOCK)); |
| 117 | if (!dummy_fence_fd_) { |
| 118 | ALOGE("ProducerChannel::ProducerChannel: Failed to create dummy fences."); |
Jiwen 'Steve' Cai | 0728fa9 | 2018-04-24 19:03:14 -0700 | [diff] [blame] | 119 | return EIO; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 120 | } |
| 121 | |
| 122 | epoll_event event; |
| 123 | event.events = 0; |
| 124 | event.data.u64 = 0ULL; |
| 125 | if (epoll_ctl(release_fence_fd_.Get(), EPOLL_CTL_ADD, dummy_fence_fd_.Get(), |
| 126 | &event) < 0) { |
| 127 | ALOGE( |
| 128 | "ProducerChannel::ProducerChannel: Failed to modify the shared " |
| 129 | "release fence to include the dummy fence: %s", |
| 130 | strerror(errno)); |
Jiwen 'Steve' Cai | 0728fa9 | 2018-04-24 19:03:14 -0700 | [diff] [blame] | 131 | return -EIO; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 132 | } |
| 133 | |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 134 | // Success. |
Jiwen 'Steve' Cai | 0728fa9 | 2018-04-24 19:03:14 -0700 | [diff] [blame] | 135 | return 0; |
| 136 | } |
| 137 | |
| 138 | std::unique_ptr<ProducerChannel> ProducerChannel::Create( |
| 139 | BufferHubService* service, int buffer_id, int channel_id, IonBuffer buffer, |
| 140 | IonBuffer metadata_buffer, size_t user_metadata_size) { |
| 141 | int error = 0; |
| 142 | std::unique_ptr<ProducerChannel> producer(new ProducerChannel( |
| 143 | service, buffer_id, channel_id, std::move(buffer), |
| 144 | std::move(metadata_buffer), user_metadata_size, &error)); |
| 145 | |
| 146 | if (error < 0) |
| 147 | return nullptr; |
| 148 | else |
| 149 | return producer; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 150 | } |
| 151 | |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 152 | Status<std::shared_ptr<ProducerChannel>> ProducerChannel::Create( |
| 153 | BufferHubService* service, int channel_id, uint32_t width, uint32_t height, |
Hendrik Wagenaar | 108e84f | 2017-05-07 22:19:17 -0700 | [diff] [blame] | 154 | uint32_t layer_count, uint32_t format, uint64_t usage, |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 155 | size_t user_metadata_size) { |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 156 | int error; |
Jiwen 'Steve' Cai | 0057fdd | 2017-05-02 11:21:18 -0700 | [diff] [blame] | 157 | std::shared_ptr<ProducerChannel> producer( |
Hendrik Wagenaar | 108e84f | 2017-05-07 22:19:17 -0700 | [diff] [blame] | 158 | new ProducerChannel(service, channel_id, width, height, layer_count, |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 159 | format, usage, user_metadata_size, &error)); |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 160 | if (error < 0) |
| 161 | return ErrorStatus(-error); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 162 | else |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 163 | return {std::move(producer)}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 164 | } |
| 165 | |
| 166 | ProducerChannel::~ProducerChannel() { |
Corey Tabaka | 3079cb7 | 2017-01-19 15:07:26 -0800 | [diff] [blame] | 167 | ALOGD_IF(TRACE, |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 168 | "ProducerChannel::~ProducerChannel: channel_id=%d buffer_id=%d " |
| 169 | "state=%" PRIx64 ".", |
Tianyu Jiang | e2cdec9 | 2018-10-30 17:40:58 -0700 | [diff] [blame] | 170 | channel_id(), buffer_id(), |
| 171 | buffer_state_->load(std::memory_order_acquire)); |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 172 | for (auto consumer : consumer_channels_) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 173 | consumer->OnProducerClosed(); |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 174 | } |
| 175 | Hangup(); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 176 | } |
| 177 | |
| 178 | BufferHubChannel::BufferInfo ProducerChannel::GetBufferInfo() const { |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 179 | // Derive the mask of signaled buffers in this producer / consumer set. |
Tianyu Jiang | 63dd7c3 | 2018-10-30 18:35:06 -0700 | [diff] [blame] | 180 | uint64_t signaled_mask = signaled() ? BufferHubDefs::kFirstClientBitMask : 0; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 181 | for (const ConsumerChannel* consumer : consumer_channels_) { |
Tianyu Jiang | 83a991f | 2018-10-30 16:59:29 -0700 | [diff] [blame] | 182 | signaled_mask |= consumer->signaled() ? consumer->client_state_mask() : 0; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 183 | } |
| 184 | |
Hendrik Wagenaar | 4d3590f | 2017-05-06 22:36:04 -0700 | [diff] [blame] | 185 | return BufferInfo(buffer_id(), consumer_channels_.size(), buffer_.width(), |
Hendrik Wagenaar | 108e84f | 2017-05-07 22:19:17 -0700 | [diff] [blame] | 186 | buffer_.height(), buffer_.layer_count(), buffer_.format(), |
Tianyu Jiang | e2cdec9 | 2018-10-30 17:40:58 -0700 | [diff] [blame] | 187 | buffer_.usage(), pending_consumers_, |
| 188 | buffer_state_->load(std::memory_order_acquire), |
Jiwen 'Steve' Cai | 2f26033 | 2018-02-15 18:39:47 -0800 | [diff] [blame] | 189 | signaled_mask, metadata_header_->queue_index); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | void ProducerChannel::HandleImpulse(Message& message) { |
| 193 | ATRACE_NAME("ProducerChannel::HandleImpulse"); |
| 194 | switch (message.GetOp()) { |
| 195 | case BufferHubRPC::ProducerGain::Opcode: |
| 196 | OnProducerGain(message); |
| 197 | break; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 198 | case BufferHubRPC::ProducerPost::Opcode: |
| 199 | OnProducerPost(message, {}); |
| 200 | break; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 201 | } |
| 202 | } |
| 203 | |
| 204 | bool ProducerChannel::HandleMessage(Message& message) { |
| 205 | ATRACE_NAME("ProducerChannel::HandleMessage"); |
| 206 | switch (message.GetOp()) { |
| 207 | case BufferHubRPC::GetBuffer::Opcode: |
| 208 | DispatchRemoteMethod<BufferHubRPC::GetBuffer>( |
| 209 | *this, &ProducerChannel::OnGetBuffer, message); |
| 210 | return true; |
| 211 | |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 212 | case BufferHubRPC::NewConsumer::Opcode: |
| 213 | DispatchRemoteMethod<BufferHubRPC::NewConsumer>( |
| 214 | *this, &ProducerChannel::OnNewConsumer, message); |
| 215 | return true; |
| 216 | |
| 217 | case BufferHubRPC::ProducerPost::Opcode: |
| 218 | DispatchRemoteMethod<BufferHubRPC::ProducerPost>( |
| 219 | *this, &ProducerChannel::OnProducerPost, message); |
| 220 | return true; |
| 221 | |
| 222 | case BufferHubRPC::ProducerGain::Opcode: |
| 223 | DispatchRemoteMethod<BufferHubRPC::ProducerGain>( |
| 224 | *this, &ProducerChannel::OnProducerGain, message); |
| 225 | return true; |
| 226 | |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 227 | default: |
| 228 | return false; |
| 229 | } |
| 230 | } |
| 231 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 232 | BufferDescription<BorrowedHandle> ProducerChannel::GetBuffer( |
Tianyu Jiang | 7e204b7 | 2018-10-26 15:39:18 -0700 | [diff] [blame] | 233 | uint64_t client_state_mask) { |
Jiwen 'Steve' Cai | 57ae3ee | 2018-05-03 17:51:52 -0700 | [diff] [blame] | 234 | return {buffer_, |
| 235 | metadata_buffer_, |
| 236 | buffer_id(), |
| 237 | channel_id(), |
Tianyu Jiang | 7e204b7 | 2018-10-26 15:39:18 -0700 | [diff] [blame] | 238 | client_state_mask, |
Jiwen 'Steve' Cai | 57ae3ee | 2018-05-03 17:51:52 -0700 | [diff] [blame] | 239 | acquire_fence_fd_.Borrow(), |
| 240 | release_fence_fd_.Borrow()}; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 241 | } |
| 242 | |
| 243 | Status<BufferDescription<BorrowedHandle>> ProducerChannel::OnGetBuffer( |
Corey Tabaka | d53870c | 2017-07-06 18:04:27 -0700 | [diff] [blame] | 244 | Message& /*message*/) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 245 | ATRACE_NAME("ProducerChannel::OnGetBuffer"); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 246 | ALOGD_IF(TRACE, "ProducerChannel::OnGetBuffer: buffer=%d, state=%" PRIx64 ".", |
Tianyu Jiang | e2cdec9 | 2018-10-30 17:40:58 -0700 | [diff] [blame] | 247 | buffer_id(), buffer_state_->load(std::memory_order_acquire)); |
Tianyu Jiang | 63dd7c3 | 2018-10-30 18:35:06 -0700 | [diff] [blame] | 248 | return {GetBuffer(BufferHubDefs::kFirstClientBitMask)}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 249 | } |
| 250 | |
Tianyu Jiang | 50f7ad1 | 2018-11-08 11:13:35 -0800 | [diff] [blame] | 251 | Status<uint64_t> ProducerChannel::CreateConsumerStateMask() { |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 252 | // Try find the next consumer state bit which has not been claimed by any |
| 253 | // consumer yet. |
Tianyu | 6705349 | 2018-10-04 14:00:22 -0700 | [diff] [blame] | 254 | // memory_order_acquire is chosen here because all writes in other threads |
| 255 | // that release active_clients_bit_mask_ need to be visible here. |
| 256 | uint64_t current_active_clients_bit_mask = |
| 257 | active_clients_bit_mask_->load(std::memory_order_acquire); |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 258 | uint64_t consumer_state_mask = |
| 259 | BufferHubDefs::FindNextAvailableClientStateMask( |
| 260 | current_active_clients_bit_mask | orphaned_consumer_bit_mask_); |
| 261 | if (consumer_state_mask == 0ULL) { |
| 262 | ALOGE("%s: reached the maximum mumber of consumers per producer: 63.", |
| 263 | __FUNCTION__); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 264 | return ErrorStatus(E2BIG); |
| 265 | } |
Tianyu | 6705349 | 2018-10-04 14:00:22 -0700 | [diff] [blame] | 266 | uint64_t updated_active_clients_bit_mask = |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 267 | current_active_clients_bit_mask | consumer_state_mask; |
Tianyu | 6705349 | 2018-10-04 14:00:22 -0700 | [diff] [blame] | 268 | // Set the updated value only if the current value stays the same as what was |
| 269 | // read before. If the comparison succeeds, update the value without |
| 270 | // reordering anything before or after this read-modify-write in the current |
| 271 | // thread, and the modification will be visible in other threads that acquire |
| 272 | // active_clients_bit_mask_. If the comparison fails, load the result of |
| 273 | // all writes from all threads to updated_active_clients_bit_mask. |
Tianyu Jiang | 50f7ad1 | 2018-11-08 11:13:35 -0800 | [diff] [blame] | 274 | // Keep on finding the next available slient state mask until succeed or out |
| 275 | // of memory. |
| 276 | while (!active_clients_bit_mask_->compare_exchange_weak( |
| 277 | current_active_clients_bit_mask, updated_active_clients_bit_mask, |
| 278 | std::memory_order_acq_rel, std::memory_order_acquire)) { |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 279 | ALOGE("%s: Current active clients bit mask is changed to %" PRIx64 |
Tianyu Jiang | 50f7ad1 | 2018-11-08 11:13:35 -0800 | [diff] [blame] | 280 | ", which was expected to be %" PRIx64 |
| 281 | ". Trying to generate a new client state mask to resolve race " |
| 282 | "condition.", |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 283 | __FUNCTION__, updated_active_clients_bit_mask, |
| 284 | current_active_clients_bit_mask); |
| 285 | consumer_state_mask = BufferHubDefs::FindNextAvailableClientStateMask( |
Tianyu Jiang | 50f7ad1 | 2018-11-08 11:13:35 -0800 | [diff] [blame] | 286 | current_active_clients_bit_mask | orphaned_consumer_bit_mask_); |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 287 | if (consumer_state_mask == 0ULL) { |
| 288 | ALOGE("%s: reached the maximum mumber of consumers per producer: %d.", |
| 289 | __FUNCTION__, (BufferHubDefs::kMaxNumberOfClients - 1)); |
Tianyu Jiang | 50f7ad1 | 2018-11-08 11:13:35 -0800 | [diff] [blame] | 290 | return ErrorStatus(E2BIG); |
| 291 | } |
| 292 | updated_active_clients_bit_mask = |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 293 | current_active_clients_bit_mask | consumer_state_mask; |
Tianyu | 6705349 | 2018-10-04 14:00:22 -0700 | [diff] [blame] | 294 | } |
| 295 | |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 296 | return {consumer_state_mask}; |
Tianyu Jiang | 50f7ad1 | 2018-11-08 11:13:35 -0800 | [diff] [blame] | 297 | } |
| 298 | |
| 299 | void ProducerChannel::RemoveConsumerClientMask(uint64_t consumer_state_mask) { |
| 300 | // Clear up the buffer state and fence state in case there is already |
| 301 | // something there due to possible race condition between producer post and |
| 302 | // consumer failed to create channel. |
| 303 | buffer_state_->fetch_and(~consumer_state_mask, std::memory_order_release); |
| 304 | fence_state_->fetch_and(~consumer_state_mask, std::memory_order_release); |
| 305 | |
| 306 | // Restore the consumer state bit and make it visible in other threads that |
| 307 | // acquire the active_clients_bit_mask_. |
| 308 | active_clients_bit_mask_->fetch_and(~consumer_state_mask, |
| 309 | std::memory_order_release); |
| 310 | } |
| 311 | |
| 312 | Status<RemoteChannelHandle> ProducerChannel::CreateConsumer( |
| 313 | Message& message, uint64_t consumer_state_mask) { |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 314 | ATRACE_NAME(__FUNCTION__); |
| 315 | ALOGD_IF(TRACE, "%s: buffer_id=%d, producer_owns=%d", __FUNCTION__, |
Tianyu Jiang | 50f7ad1 | 2018-11-08 11:13:35 -0800 | [diff] [blame] | 316 | buffer_id(), producer_owns_); |
| 317 | |
| 318 | int channel_id; |
| 319 | auto status = message.PushChannel(0, nullptr, &channel_id); |
| 320 | if (!status) { |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 321 | ALOGE("%s: Failed to push consumer channel: %s", __FUNCTION__, |
| 322 | status.GetErrorMessage().c_str()); |
Tianyu Jiang | 50f7ad1 | 2018-11-08 11:13:35 -0800 | [diff] [blame] | 323 | RemoveConsumerClientMask(consumer_state_mask); |
| 324 | return ErrorStatus(ENOMEM); |
| 325 | } |
| 326 | |
| 327 | auto consumer = std::make_shared<ConsumerChannel>( |
| 328 | service(), buffer_id(), channel_id, consumer_state_mask, |
| 329 | shared_from_this()); |
Alex Vakulenko | f0a7bd0 | 2017-03-31 18:06:19 -0700 | [diff] [blame] | 330 | const auto channel_status = service()->SetChannel(channel_id, consumer); |
| 331 | if (!channel_status) { |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 332 | ALOGE("%s: failed to set new consumer channel: %s.", __FUNCTION__, |
| 333 | channel_status.GetErrorMessage().c_str()); |
Tianyu Jiang | 50f7ad1 | 2018-11-08 11:13:35 -0800 | [diff] [blame] | 334 | RemoveConsumerClientMask(consumer_state_mask); |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 335 | return ErrorStatus(ENOMEM); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 336 | } |
| 337 | |
Tianyu Jiang | ca9201a | 2018-11-06 12:40:33 -0800 | [diff] [blame] | 338 | uint64_t current_buffer_state = |
| 339 | buffer_state_->load(std::memory_order_acquire); |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 340 | if (BufferHubDefs::IsBufferReleased(current_buffer_state) || |
| 341 | BufferHubDefs::AnyClientGained(current_buffer_state)) { |
| 342 | return {status.take()}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 343 | } |
| 344 | |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 345 | // Signal the new consumer when adding it to a posted producer. |
| 346 | bool update_buffer_state = true; |
| 347 | if (!BufferHubDefs::IsClientPosted(current_buffer_state, |
| 348 | consumer_state_mask)) { |
| 349 | uint64_t updated_buffer_state = |
| 350 | current_buffer_state ^ |
| 351 | (consumer_state_mask & BufferHubDefs::kHighBitsMask); |
| 352 | while (!buffer_state_->compare_exchange_weak( |
| 353 | current_buffer_state, updated_buffer_state, std::memory_order_acq_rel, |
| 354 | std::memory_order_acquire)) { |
| 355 | ALOGI( |
| 356 | "%s: Failed to post to the new consumer. " |
| 357 | "Current buffer state was changed to %" PRIx64 |
| 358 | " when trying to acquire the buffer and modify the buffer state to " |
| 359 | "%" PRIx64 |
| 360 | ". About to try again if the buffer is still not gained nor fully " |
| 361 | "released.", |
| 362 | __FUNCTION__, current_buffer_state, updated_buffer_state); |
| 363 | if (BufferHubDefs::IsBufferReleased(current_buffer_state) || |
| 364 | BufferHubDefs::AnyClientGained(current_buffer_state)) { |
| 365 | ALOGI("%s: buffer is gained or fully released, state=%" PRIx64 ".", |
| 366 | __FUNCTION__, current_buffer_state); |
| 367 | update_buffer_state = false; |
| 368 | break; |
| 369 | } |
| 370 | updated_buffer_state = |
| 371 | current_buffer_state ^ |
| 372 | (consumer_state_mask & BufferHubDefs::kHighBitsMask); |
| 373 | } |
| 374 | } |
| 375 | if (update_buffer_state && consumer->OnProducerPosted()) |
| 376 | pending_consumers_++; |
| 377 | |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 378 | return {status.take()}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 379 | } |
| 380 | |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 381 | Status<RemoteChannelHandle> ProducerChannel::OnNewConsumer(Message& message) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 382 | ATRACE_NAME("ProducerChannel::OnNewConsumer"); |
| 383 | ALOGD_IF(TRACE, "ProducerChannel::OnNewConsumer: buffer_id=%d", buffer_id()); |
Tianyu Jiang | 50f7ad1 | 2018-11-08 11:13:35 -0800 | [diff] [blame] | 384 | auto status = CreateConsumerStateMask(); |
| 385 | if (!status.ok()) { |
| 386 | return status.error_status(); |
| 387 | } |
| 388 | return CreateConsumer(message, /*consumer_state_mask=*/status.get()); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 389 | } |
| 390 | |
Tianyu | 0c6b7ff | 2018-10-03 11:30:04 -0700 | [diff] [blame] | 391 | Status<void> ProducerChannel::OnProducerPost(Message&, |
| 392 | LocalFence acquire_fence) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 393 | ATRACE_NAME("ProducerChannel::OnProducerPost"); |
| 394 | ALOGD_IF(TRACE, "ProducerChannel::OnProducerPost: buffer_id=%d", buffer_id()); |
| 395 | if (!producer_owns_) { |
| 396 | ALOGE("ProducerChannel::OnProducerPost: Not in gained state!"); |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 397 | return ErrorStatus(EBUSY); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 398 | } |
| 399 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 400 | epoll_event event; |
| 401 | event.events = 0; |
| 402 | event.data.u64 = 0ULL; |
| 403 | int ret = epoll_ctl(release_fence_fd_.Get(), EPOLL_CTL_MOD, |
| 404 | dummy_fence_fd_.Get(), &event); |
| 405 | ALOGE_IF(ret < 0, |
Tianyu | 0c6b7ff | 2018-10-03 11:30:04 -0700 | [diff] [blame] | 406 | "ProducerChannel::OnProducerPost: Failed to modify the shared " |
| 407 | "release fence to include the dummy fence: %s", |
| 408 | strerror(errno)); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 409 | |
| 410 | eventfd_t dummy_fence_count = 0ULL; |
| 411 | if (eventfd_read(dummy_fence_fd_.Get(), &dummy_fence_count) < 0) { |
| 412 | const int error = errno; |
| 413 | if (error != EAGAIN) { |
| 414 | ALOGE( |
| 415 | "ProducerChannel::ProducerChannel: Failed to read dummy fence, " |
| 416 | "error: %s", |
| 417 | strerror(error)); |
| 418 | return ErrorStatus(error); |
| 419 | } |
Corey Tabaka | 8a4e6a9 | 2017-04-20 13:42:02 -0700 | [diff] [blame] | 420 | } |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 421 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 422 | ALOGW_IF(dummy_fence_count > 0, |
| 423 | "ProducerChannel::ProducerChannel: %" PRIu64 |
| 424 | " dummy fence(s) was signaled during last release/gain cycle " |
| 425 | "buffer_id=%d.", |
| 426 | dummy_fence_count, buffer_id()); |
| 427 | |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 428 | post_fence_ = std::move(acquire_fence); |
| 429 | producer_owns_ = false; |
| 430 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 431 | // Signal any interested consumers. If there are none, the buffer will stay |
| 432 | // in posted state until a consumer comes online. This behavior guarantees |
| 433 | // that no frame is silently dropped. |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 434 | pending_consumers_ = 0; |
| 435 | for (auto consumer : consumer_channels_) { |
| 436 | if (consumer->OnProducerPosted()) |
| 437 | pending_consumers_++; |
| 438 | } |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 439 | ALOGD_IF(TRACE, "ProducerChannel::OnProducerPost: %d pending consumers", |
| 440 | pending_consumers_); |
| 441 | |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 442 | return {}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 443 | } |
| 444 | |
Corey Tabaka | d53870c | 2017-07-06 18:04:27 -0700 | [diff] [blame] | 445 | Status<LocalFence> ProducerChannel::OnProducerGain(Message& /*message*/) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 446 | ATRACE_NAME("ProducerChannel::OnGain"); |
| 447 | ALOGD_IF(TRACE, "ProducerChannel::OnGain: buffer_id=%d", buffer_id()); |
| 448 | if (producer_owns_) { |
| 449 | ALOGE("ProducerChanneL::OnGain: Already in gained state: channel=%d", |
| 450 | channel_id()); |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 451 | // TODO(b/119331650): remove this if check if producer_owns_ is removed. |
| 452 | // return ErrorStatus(EALREADY); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 453 | } |
| 454 | |
| 455 | // There are still pending consumers, return busy. |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 456 | if (pending_consumers_ > 0) { |
| 457 | ALOGE( |
| 458 | "ProducerChannel::OnGain: Producer (id=%d) is gaining a buffer that " |
| 459 | "still has %d pending consumer(s).", |
| 460 | buffer_id(), pending_consumers_); |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 461 | // TODO(b/77153033): add gain_posted_buffer to the impulse args, and |
| 462 | // return busy if the function does not allow gaining posted buffer. |
| 463 | // TODO(b/119331650): remove this if check if pending_consumers_ is removed. |
| 464 | // return ErrorStatus(EBUSY); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 465 | } |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 466 | |
| 467 | ClearAvailable(); |
| 468 | producer_owns_ = true; |
Alex Vakulenko | 052f3ae | 2017-03-31 09:10:43 -0700 | [diff] [blame] | 469 | post_fence_.close(); |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 470 | return {std::move(returned_fence_)}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 471 | } |
| 472 | |
Fan Xu | b0eec51 | 2018-10-30 11:33:15 -0700 | [diff] [blame] | 473 | // TODO(b/112338294) Keep here for reference. Remove it after new logic is |
| 474 | // written. |
| 475 | /* Status<RemoteChannelHandle> ProducerChannel::OnProducerDetach( |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 476 | Message& message) { |
| 477 | ATRACE_NAME("ProducerChannel::OnProducerDetach"); |
| 478 | ALOGD_IF(TRACE, "ProducerChannel::OnProducerDetach: buffer_id=%d", |
| 479 | buffer_id()); |
| 480 | |
Tianyu Jiang | e2cdec9 | 2018-10-30 17:40:58 -0700 | [diff] [blame] | 481 | uint64_t buffer_state = buffer_state_->load(std::memory_order_acquire); |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 482 | if (!BufferHubDefs::IsClientGained( |
| 483 | buffer_state, BufferHubDefs::kFirstClientStateMask)) { |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 484 | // Can only detach a BufferProducer when it's in gained state. |
| 485 | ALOGW( |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 486 | "ProducerChannel::OnProducerDetach: The buffer (id=%d, state=%" |
| 487 | PRIx64 |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 488 | ") is not in gained state.", |
| 489 | buffer_id(), buffer_state); |
| 490 | return {}; |
| 491 | } |
| 492 | |
| 493 | int channel_id; |
| 494 | auto status = message.PushChannel(0, nullptr, &channel_id); |
| 495 | if (!status) { |
| 496 | ALOGE( |
| 497 | "ProducerChannel::OnProducerDetach: Failed to push detached buffer " |
| 498 | "channel: %s", |
| 499 | status.GetErrorMessage().c_str()); |
| 500 | return ErrorStatus(ENOMEM); |
| 501 | } |
| 502 | |
| 503 | // Make sure we unlock the buffer. |
| 504 | if (int ret = metadata_buffer_.Unlock()) { |
| 505 | ALOGE("ProducerChannel::OnProducerDetach: Failed to unlock metadata."); |
| 506 | return ErrorStatus(-ret); |
| 507 | }; |
| 508 | |
Jiwen 'Steve' Cai | 9004b8c | 2018-10-03 18:52:23 -0700 | [diff] [blame] | 509 | std::unique_ptr<BufferChannel> channel = |
| 510 | BufferChannel::Create(service(), buffer_id(), channel_id, |
| 511 | std::move(buffer_), user_metadata_size_); |
Jiwen 'Steve' Cai | a8049a2 | 2018-03-28 15:14:02 -0700 | [diff] [blame] | 512 | if (!channel) { |
| 513 | ALOGE("ProducerChannel::OnProducerDetach: Invalid buffer."); |
| 514 | return ErrorStatus(EINVAL); |
| 515 | } |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 516 | |
Jiwen 'Steve' Cai | a8049a2 | 2018-03-28 15:14:02 -0700 | [diff] [blame] | 517 | const auto channel_status = |
| 518 | service()->SetChannel(channel_id, std::move(channel)); |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 519 | if (!channel_status) { |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 520 | // Technically, this should never fail, as we just pushed the channel. |
| 521 | // Note that LOG_FATAL will be stripped out in non-debug build. |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 522 | LOG_FATAL( |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 523 | "ProducerChannel::OnProducerDetach: Failed to set new detached " |
| 524 | "buffer channel: %s.", channel_status.GetErrorMessage().c_str()); |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 525 | } |
| 526 | |
| 527 | return status; |
Fan Xu | b0eec51 | 2018-10-30 11:33:15 -0700 | [diff] [blame] | 528 | } */ |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 529 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 530 | Status<LocalFence> ProducerChannel::OnConsumerAcquire(Message& /*message*/) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 531 | ATRACE_NAME("ProducerChannel::OnConsumerAcquire"); |
| 532 | ALOGD_IF(TRACE, "ProducerChannel::OnConsumerAcquire: buffer_id=%d", |
| 533 | buffer_id()); |
| 534 | if (producer_owns_) { |
| 535 | ALOGE("ProducerChannel::OnConsumerAcquire: Not in posted state!"); |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 536 | return ErrorStatus(EBUSY); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 537 | } |
| 538 | |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 539 | // Return a borrowed fd to avoid unnecessary duplication of the underlying |
| 540 | // fd. Serialization just needs to read the handle. |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 541 | return {std::move(post_fence_)}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 542 | } |
| 543 | |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 544 | Status<void> ProducerChannel::OnConsumerRelease(Message&, |
| 545 | LocalFence release_fence) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 546 | ATRACE_NAME("ProducerChannel::OnConsumerRelease"); |
| 547 | ALOGD_IF(TRACE, "ProducerChannel::OnConsumerRelease: buffer_id=%d", |
| 548 | buffer_id()); |
| 549 | if (producer_owns_) { |
| 550 | ALOGE("ProducerChannel::OnConsumerRelease: Not in acquired state!"); |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 551 | return ErrorStatus(EBUSY); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 552 | } |
| 553 | |
| 554 | // Attempt to merge the fences if necessary. |
| 555 | if (release_fence) { |
| 556 | if (returned_fence_) { |
Corey Tabaka | 3079cb7 | 2017-01-19 15:07:26 -0800 | [diff] [blame] | 557 | LocalFence merged_fence(sync_merge("bufferhub_merged", |
| 558 | returned_fence_.get_fd(), |
| 559 | release_fence.get_fd())); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 560 | const int error = errno; |
| 561 | if (!merged_fence) { |
| 562 | ALOGE("ProducerChannel::OnConsumerRelease: Failed to merge fences: %s", |
| 563 | strerror(error)); |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 564 | return ErrorStatus(error); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 565 | } |
| 566 | returned_fence_ = std::move(merged_fence); |
| 567 | } else { |
| 568 | returned_fence_ = std::move(release_fence); |
| 569 | } |
| 570 | } |
| 571 | |
Tianyu | 0c6b7ff | 2018-10-03 11:30:04 -0700 | [diff] [blame] | 572 | DecrementPendingConsumers(); |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 573 | if (pending_consumers_ == 0 && orphaned_consumer_bit_mask_) { |
| 574 | ALOGW( |
| 575 | "%s: orphaned buffer detected during the this acquire/release cycle: " |
| 576 | "id=%d orphaned=0x%" PRIx64 " queue_index=%" PRIx64 ".", |
| 577 | __FUNCTION__, buffer_id(), orphaned_consumer_bit_mask_, |
| 578 | metadata_header_->queue_index); |
| 579 | orphaned_consumer_bit_mask_ = 0; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 580 | } |
| 581 | |
Tianyu Jiang | e2cdec9 | 2018-10-30 17:40:58 -0700 | [diff] [blame] | 582 | ALOGE_IF( |
| 583 | pending_consumers_ && BufferHubDefs::IsBufferReleased( |
| 584 | buffer_state_->load(std::memory_order_acquire)), |
| 585 | "ProducerChannel::OnConsumerRelease: buffer state inconsistent: " |
| 586 | "pending_consumers=%d, buffer buffer is in releaed state.", |
| 587 | pending_consumers_); |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 588 | return {}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 589 | } |
| 590 | |
Tianyu | 0c6b7ff | 2018-10-03 11:30:04 -0700 | [diff] [blame] | 591 | void ProducerChannel::DecrementPendingConsumers() { |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 592 | if (pending_consumers_ == 0) { |
Tianyu | 0c6b7ff | 2018-10-03 11:30:04 -0700 | [diff] [blame] | 593 | ALOGE("ProducerChannel::DecrementPendingConsumers: no pending consumer."); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 594 | return; |
| 595 | } |
| 596 | |
| 597 | --pending_consumers_; |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 598 | ALOGD_IF(TRACE, "%s: buffer_id=%d %d consumers left", __FUNCTION__, |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 599 | buffer_id(), pending_consumers_); |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 600 | |
| 601 | if (pending_consumers_ == 0) { |
| 602 | ALOGD_IF(TRACE, |
| 603 | "%s: releasing last consumer: buffer_id=%d state=%" PRIx64 ".", |
| 604 | __FUNCTION__, buffer_id(), |
| 605 | buffer_state_->load(std::memory_order_acquire)); |
| 606 | SignalAvailable(); |
| 607 | } |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 608 | } |
| 609 | |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 610 | void ProducerChannel::OnConsumerOrphaned(const uint64_t& consumer_state_mask) { |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 611 | // Ignore the orphaned consumer. |
Tianyu | 0c6b7ff | 2018-10-03 11:30:04 -0700 | [diff] [blame] | 612 | DecrementPendingConsumers(); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 613 | |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 614 | // Remember the ignored consumer so that newly added consumer won't be |
| 615 | // taking the same state mask as this orphaned consumer. |
| 616 | ALOGE_IF(orphaned_consumer_bit_mask_ & consumer_state_mask, |
| 617 | "%s: Consumer (consumer_state_mask=%" PRIx64 |
| 618 | ") is already orphaned.", |
| 619 | __FUNCTION__, consumer_state_mask); |
| 620 | orphaned_consumer_bit_mask_ |= consumer_state_mask; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 621 | |
| 622 | // Atomically clear the fence state bit as an orphaned consumer will never |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 623 | // signal a release fence. |
| 624 | fence_state_->fetch_and(~consumer_state_mask, std::memory_order_release); |
| 625 | |
| 626 | // Atomically set the buffer state of this consumer to released state. |
| 627 | buffer_state_->fetch_and(~consumer_state_mask, std::memory_order_release); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 628 | |
| 629 | ALOGW( |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 630 | "%s: detected new orphaned consumer buffer_id=%d " |
| 631 | "consumer_state_mask=%" PRIx64 " queue_index=%" PRIx64 |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 632 | " buffer_state=%" PRIx64 " fence_state=%" PRIx64 ".", |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 633 | __FUNCTION__, buffer_id(), consumer_state_mask, |
| 634 | metadata_header_->queue_index, |
Tianyu Jiang | e2cdec9 | 2018-10-30 17:40:58 -0700 | [diff] [blame] | 635 | buffer_state_->load(std::memory_order_acquire), |
| 636 | fence_state_->load(std::memory_order_acquire)); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 637 | } |
| 638 | |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 639 | void ProducerChannel::AddConsumer(ConsumerChannel* channel) { |
| 640 | consumer_channels_.push_back(channel); |
| 641 | } |
| 642 | |
| 643 | void ProducerChannel::RemoveConsumer(ConsumerChannel* channel) { |
| 644 | consumer_channels_.erase( |
| 645 | std::find(consumer_channels_.begin(), consumer_channels_.end(), channel)); |
Tianyu | 6705349 | 2018-10-04 14:00:22 -0700 | [diff] [blame] | 646 | // Restore the consumer state bit and make it visible in other threads that |
| 647 | // acquire the active_clients_bit_mask_. |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 648 | uint64_t consumer_state_mask = channel->client_state_mask(); |
| 649 | uint64_t current_active_clients_bit_mask = |
| 650 | active_clients_bit_mask_->load(std::memory_order_acquire); |
| 651 | uint64_t updated_active_clients_bit_mask = |
| 652 | current_active_clients_bit_mask & (~consumer_state_mask); |
| 653 | while (!active_clients_bit_mask_->compare_exchange_weak( |
| 654 | current_active_clients_bit_mask, updated_active_clients_bit_mask, |
| 655 | std::memory_order_acq_rel, std::memory_order_acquire)) { |
| 656 | ALOGI( |
| 657 | "%s: Failed to remove consumer state mask. Current active clients bit " |
| 658 | "mask is changed to %" PRIu64 |
| 659 | " when trying to acquire and modify it to %" PRIu64 |
| 660 | ". About to try again.", |
| 661 | __FUNCTION__, current_active_clients_bit_mask, |
| 662 | updated_active_clients_bit_mask); |
| 663 | updated_active_clients_bit_mask = |
| 664 | current_active_clients_bit_mask & (~consumer_state_mask); |
| 665 | } |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 666 | |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 667 | const uint64_t current_buffer_state = |
| 668 | buffer_state_->load(std::memory_order_acquire); |
| 669 | if (BufferHubDefs::IsClientPosted(current_buffer_state, |
| 670 | consumer_state_mask) || |
| 671 | BufferHubDefs::IsClientAcquired(current_buffer_state, |
| 672 | consumer_state_mask)) { |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 673 | // The consumer client is being destoryed without releasing. This could |
| 674 | // happen in corner cases when the consumer crashes. Here we mark it |
| 675 | // orphaned before remove it from producer. |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 676 | OnConsumerOrphaned(consumer_state_mask); |
| 677 | return; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 678 | } |
| 679 | |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 680 | if (BufferHubDefs::IsClientReleased(current_buffer_state, |
| 681 | consumer_state_mask) || |
| 682 | BufferHubDefs::AnyClientGained(current_buffer_state)) { |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 683 | // The consumer is being close while it is suppose to signal a release |
| 684 | // fence. Signal the dummy fence here. |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 685 | if (fence_state_->load(std::memory_order_acquire) & consumer_state_mask) { |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 686 | epoll_event event; |
| 687 | event.events = EPOLLIN; |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 688 | event.data.u64 = consumer_state_mask; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 689 | if (epoll_ctl(release_fence_fd_.Get(), EPOLL_CTL_MOD, |
| 690 | dummy_fence_fd_.Get(), &event) < 0) { |
| 691 | ALOGE( |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 692 | "%s: Failed to modify the shared release fence to include the " |
| 693 | "dummy fence: %s", |
| 694 | __FUNCTION__, strerror(errno)); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 695 | return; |
| 696 | } |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 697 | ALOGW("%s: signal dummy release fence buffer_id=%d", __FUNCTION__, |
| 698 | buffer_id()); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 699 | eventfd_write(dummy_fence_fd_.Get(), 1); |
| 700 | } |
| 701 | } |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 702 | } |
| 703 | |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame^] | 704 | // Returns true if the given parameters match the underlying buffer |
| 705 | // parameters. |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 706 | bool ProducerChannel::CheckParameters(uint32_t width, uint32_t height, |
Hendrik Wagenaar | 108e84f | 2017-05-07 22:19:17 -0700 | [diff] [blame] | 707 | uint32_t layer_count, uint32_t format, |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 708 | uint64_t usage, |
| 709 | size_t user_metadata_size) { |
| 710 | return user_metadata_size == user_metadata_size_ && |
| 711 | buffer_.width() == width && buffer_.height() == height && |
| 712 | buffer_.layer_count() == layer_count && buffer_.format() == format && |
| 713 | buffer_.usage() == usage; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 714 | } |
| 715 | |
| 716 | } // namespace dvr |
| 717 | } // namespace android |