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> |
Tianyu | 0c6b7ff | 2018-10-03 11:30:04 -0700 | [diff] [blame] | 10 | #include <private/dvr/bufferhub_rpc.h> |
Fan Xu | 74df490 | 2018-09-20 16:40:51 -0700 | [diff] [blame] | 11 | #include <private/dvr/consumer_channel.h> |
| 12 | #include <private/dvr/producer_channel.h> |
| 13 | #include <sync/sync.h> |
| 14 | #include <utils/Trace.h> |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 15 | |
| 16 | using android::pdx::BorrowedHandle; |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 17 | using android::pdx::ErrorStatus; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 18 | using android::pdx::Message; |
| 19 | using android::pdx::RemoteChannelHandle; |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 20 | using android::pdx::Status; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 21 | using android::pdx::rpc::BufferWrapper; |
| 22 | using android::pdx::rpc::DispatchRemoteMethod; |
| 23 | using android::pdx::rpc::WrapBuffer; |
| 24 | |
| 25 | namespace android { |
| 26 | namespace dvr { |
| 27 | |
Jiwen 'Steve' Cai | 0728fa9 | 2018-04-24 19:03:14 -0700 | [diff] [blame] | 28 | ProducerChannel::ProducerChannel(BufferHubService* service, int buffer_id, |
| 29 | int channel_id, IonBuffer buffer, |
| 30 | IonBuffer metadata_buffer, |
| 31 | size_t user_metadata_size, int* error) |
| 32 | : BufferHubChannel(service, buffer_id, channel_id, kProducerType), |
| 33 | buffer_(std::move(buffer)), |
| 34 | metadata_buffer_(std::move(metadata_buffer)), |
| 35 | user_metadata_size_(user_metadata_size), |
| 36 | metadata_buf_size_(BufferHubDefs::kMetadataHeaderSize + |
| 37 | user_metadata_size) { |
| 38 | if (!buffer_.IsValid()) { |
| 39 | ALOGE("ProducerChannel::ProducerChannel: Invalid buffer."); |
| 40 | *error = -EINVAL; |
| 41 | return; |
| 42 | } |
| 43 | if (!metadata_buffer_.IsValid()) { |
| 44 | ALOGE("ProducerChannel::ProducerChannel: Invalid metadata buffer."); |
| 45 | *error = -EINVAL; |
| 46 | return; |
| 47 | } |
| 48 | |
| 49 | *error = InitializeBuffer(); |
| 50 | } |
| 51 | |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 52 | ProducerChannel::ProducerChannel(BufferHubService* service, int channel_id, |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 53 | uint32_t width, uint32_t height, |
Hendrik Wagenaar | 108e84f | 2017-05-07 22:19:17 -0700 | [diff] [blame] | 54 | uint32_t layer_count, uint32_t format, |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 55 | uint64_t usage, size_t user_metadata_size, |
Hendrik Wagenaar | 108e84f | 2017-05-07 22:19:17 -0700 | [diff] [blame] | 56 | int* error) |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 57 | : BufferHubChannel(service, channel_id, channel_id, kProducerType), |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 58 | user_metadata_size_(user_metadata_size), |
| 59 | metadata_buf_size_(BufferHubDefs::kMetadataHeaderSize + |
| 60 | user_metadata_size) { |
| 61 | if (int ret = buffer_.Alloc(width, height, layer_count, format, usage)) { |
Hendrik Wagenaar | 4d3590f | 2017-05-06 22:36:04 -0700 | [diff] [blame] | 62 | ALOGE("ProducerChannel::ProducerChannel: Failed to allocate buffer: %s", |
| 63 | strerror(-ret)); |
| 64 | *error = ret; |
| 65 | return; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 66 | } |
| 67 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 68 | if (int ret = metadata_buffer_.Alloc(metadata_buf_size_, /*height=*/1, |
| 69 | /*layer_count=*/1, |
| 70 | BufferHubDefs::kMetadataFormat, |
| 71 | BufferHubDefs::kMetadataUsage)) { |
| 72 | ALOGE("ProducerChannel::ProducerChannel: Failed to allocate metadata: %s", |
| 73 | strerror(-ret)); |
| 74 | *error = ret; |
| 75 | return; |
| 76 | } |
| 77 | |
Jiwen 'Steve' Cai | 0728fa9 | 2018-04-24 19:03:14 -0700 | [diff] [blame] | 78 | *error = InitializeBuffer(); |
| 79 | } |
| 80 | |
| 81 | int ProducerChannel::InitializeBuffer() { |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 82 | void* metadata_ptr = nullptr; |
| 83 | if (int ret = metadata_buffer_.Lock(BufferHubDefs::kMetadataUsage, /*x=*/0, |
| 84 | /*y=*/0, metadata_buf_size_, |
| 85 | /*height=*/1, &metadata_ptr)) { |
| 86 | ALOGE("ProducerChannel::ProducerChannel: Failed to lock metadata."); |
Jiwen 'Steve' Cai | 0728fa9 | 2018-04-24 19:03:14 -0700 | [diff] [blame] | 87 | return ret; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 88 | } |
| 89 | metadata_header_ = |
| 90 | reinterpret_cast<BufferHubDefs::MetadataHeader*>(metadata_ptr); |
| 91 | |
| 92 | // Using placement new here to reuse shared memory instead of new allocation |
| 93 | // and also initialize the value to zero. |
| 94 | buffer_state_ = |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 95 | new (&metadata_header_->buffer_state) std::atomic<uint32_t>(0); |
| 96 | fence_state_ = new (&metadata_header_->fence_state) std::atomic<uint32_t>(0); |
Tianyu | 6705349 | 2018-10-04 14:00:22 -0700 | [diff] [blame] | 97 | active_clients_bit_mask_ = |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 98 | new (&metadata_header_->active_clients_bit_mask) std::atomic<uint32_t>(0); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 99 | |
Tianyu Jiang | 63dd7c3 | 2018-10-30 18:35:06 -0700 | [diff] [blame] | 100 | // Producer channel is never created after consumer channel, and one buffer |
| 101 | // only have one fixed producer for now. Thus, it is correct to assume |
| 102 | // producer state bit is kFirstClientBitMask for now. |
| 103 | active_clients_bit_mask_->store(BufferHubDefs::kFirstClientBitMask, |
| 104 | std::memory_order_release); |
| 105 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 106 | acquire_fence_fd_.Reset(epoll_create1(EPOLL_CLOEXEC)); |
| 107 | release_fence_fd_.Reset(epoll_create1(EPOLL_CLOEXEC)); |
| 108 | if (!acquire_fence_fd_ || !release_fence_fd_) { |
| 109 | ALOGE("ProducerChannel::ProducerChannel: Failed to create shared fences."); |
Jiwen 'Steve' Cai | 0728fa9 | 2018-04-24 19:03:14 -0700 | [diff] [blame] | 110 | return -EIO; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 111 | } |
| 112 | |
| 113 | dummy_fence_fd_.Reset(eventfd(0, EFD_CLOEXEC | EFD_NONBLOCK)); |
| 114 | if (!dummy_fence_fd_) { |
| 115 | ALOGE("ProducerChannel::ProducerChannel: Failed to create dummy fences."); |
Jiwen 'Steve' Cai | 0728fa9 | 2018-04-24 19:03:14 -0700 | [diff] [blame] | 116 | return EIO; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 117 | } |
| 118 | |
| 119 | epoll_event event; |
| 120 | event.events = 0; |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 121 | event.data.u32 = 0U; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 122 | if (epoll_ctl(release_fence_fd_.Get(), EPOLL_CTL_ADD, dummy_fence_fd_.Get(), |
| 123 | &event) < 0) { |
| 124 | ALOGE( |
| 125 | "ProducerChannel::ProducerChannel: Failed to modify the shared " |
| 126 | "release fence to include the dummy fence: %s", |
| 127 | strerror(errno)); |
Jiwen 'Steve' Cai | 0728fa9 | 2018-04-24 19:03:14 -0700 | [diff] [blame] | 128 | return -EIO; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 129 | } |
| 130 | |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 131 | // Success. |
Jiwen 'Steve' Cai | 0728fa9 | 2018-04-24 19:03:14 -0700 | [diff] [blame] | 132 | return 0; |
| 133 | } |
| 134 | |
| 135 | std::unique_ptr<ProducerChannel> ProducerChannel::Create( |
| 136 | BufferHubService* service, int buffer_id, int channel_id, IonBuffer buffer, |
| 137 | IonBuffer metadata_buffer, size_t user_metadata_size) { |
| 138 | int error = 0; |
| 139 | std::unique_ptr<ProducerChannel> producer(new ProducerChannel( |
| 140 | service, buffer_id, channel_id, std::move(buffer), |
| 141 | std::move(metadata_buffer), user_metadata_size, &error)); |
| 142 | |
| 143 | if (error < 0) |
| 144 | return nullptr; |
| 145 | else |
| 146 | return producer; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 147 | } |
| 148 | |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 149 | Status<std::shared_ptr<ProducerChannel>> ProducerChannel::Create( |
| 150 | BufferHubService* service, int channel_id, uint32_t width, uint32_t height, |
Hendrik Wagenaar | 108e84f | 2017-05-07 22:19:17 -0700 | [diff] [blame] | 151 | uint32_t layer_count, uint32_t format, uint64_t usage, |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 152 | size_t user_metadata_size) { |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 153 | int error; |
Jiwen 'Steve' Cai | 0057fdd | 2017-05-02 11:21:18 -0700 | [diff] [blame] | 154 | std::shared_ptr<ProducerChannel> producer( |
Hendrik Wagenaar | 108e84f | 2017-05-07 22:19:17 -0700 | [diff] [blame] | 155 | new ProducerChannel(service, channel_id, width, height, layer_count, |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 156 | format, usage, user_metadata_size, &error)); |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 157 | if (error < 0) |
| 158 | return ErrorStatus(-error); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 159 | else |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 160 | return {std::move(producer)}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 161 | } |
| 162 | |
| 163 | ProducerChannel::~ProducerChannel() { |
Corey Tabaka | 3079cb7 | 2017-01-19 15:07:26 -0800 | [diff] [blame] | 164 | ALOGD_IF(TRACE, |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 165 | "ProducerChannel::~ProducerChannel: channel_id=%d buffer_id=%d " |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 166 | "state=%" PRIx32 ".", |
Tianyu Jiang | e2cdec9 | 2018-10-30 17:40:58 -0700 | [diff] [blame] | 167 | channel_id(), buffer_id(), |
| 168 | buffer_state_->load(std::memory_order_acquire)); |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 169 | for (auto consumer : consumer_channels_) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 170 | consumer->OnProducerClosed(); |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 171 | } |
| 172 | Hangup(); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 173 | } |
| 174 | |
| 175 | BufferHubChannel::BufferInfo ProducerChannel::GetBufferInfo() const { |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 176 | // Derive the mask of signaled buffers in this producer / consumer set. |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 177 | uint32_t signaled_mask = signaled() ? BufferHubDefs::kFirstClientBitMask : 0; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 178 | for (const ConsumerChannel* consumer : consumer_channels_) { |
Tianyu Jiang | 83a991f | 2018-10-30 16:59:29 -0700 | [diff] [blame] | 179 | signaled_mask |= consumer->signaled() ? consumer->client_state_mask() : 0; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 180 | } |
| 181 | |
Hendrik Wagenaar | 4d3590f | 2017-05-06 22:36:04 -0700 | [diff] [blame] | 182 | return BufferInfo(buffer_id(), consumer_channels_.size(), buffer_.width(), |
Hendrik Wagenaar | 108e84f | 2017-05-07 22:19:17 -0700 | [diff] [blame] | 183 | buffer_.height(), buffer_.layer_count(), buffer_.format(), |
Tianyu Jiang | 0cdd2a0 | 2018-11-15 10:20:45 -0800 | [diff] [blame] | 184 | buffer_.usage(), |
Tianyu Jiang | e2cdec9 | 2018-10-30 17:40:58 -0700 | [diff] [blame] | 185 | buffer_state_->load(std::memory_order_acquire), |
Jiwen 'Steve' Cai | 2f26033 | 2018-02-15 18:39:47 -0800 | [diff] [blame] | 186 | signaled_mask, metadata_header_->queue_index); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 187 | } |
| 188 | |
| 189 | void ProducerChannel::HandleImpulse(Message& message) { |
| 190 | ATRACE_NAME("ProducerChannel::HandleImpulse"); |
| 191 | switch (message.GetOp()) { |
| 192 | case BufferHubRPC::ProducerGain::Opcode: |
| 193 | OnProducerGain(message); |
| 194 | break; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 195 | case BufferHubRPC::ProducerPost::Opcode: |
| 196 | OnProducerPost(message, {}); |
| 197 | break; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 198 | } |
| 199 | } |
| 200 | |
| 201 | bool ProducerChannel::HandleMessage(Message& message) { |
| 202 | ATRACE_NAME("ProducerChannel::HandleMessage"); |
| 203 | switch (message.GetOp()) { |
| 204 | case BufferHubRPC::GetBuffer::Opcode: |
| 205 | DispatchRemoteMethod<BufferHubRPC::GetBuffer>( |
| 206 | *this, &ProducerChannel::OnGetBuffer, message); |
| 207 | return true; |
| 208 | |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 209 | case BufferHubRPC::NewConsumer::Opcode: |
| 210 | DispatchRemoteMethod<BufferHubRPC::NewConsumer>( |
| 211 | *this, &ProducerChannel::OnNewConsumer, message); |
| 212 | return true; |
| 213 | |
| 214 | case BufferHubRPC::ProducerPost::Opcode: |
| 215 | DispatchRemoteMethod<BufferHubRPC::ProducerPost>( |
| 216 | *this, &ProducerChannel::OnProducerPost, message); |
| 217 | return true; |
| 218 | |
| 219 | case BufferHubRPC::ProducerGain::Opcode: |
| 220 | DispatchRemoteMethod<BufferHubRPC::ProducerGain>( |
| 221 | *this, &ProducerChannel::OnProducerGain, message); |
| 222 | return true; |
| 223 | |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 224 | default: |
| 225 | return false; |
| 226 | } |
| 227 | } |
| 228 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 229 | BufferDescription<BorrowedHandle> ProducerChannel::GetBuffer( |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 230 | uint32_t client_state_mask) { |
Jiwen 'Steve' Cai | 57ae3ee | 2018-05-03 17:51:52 -0700 | [diff] [blame] | 231 | return {buffer_, |
| 232 | metadata_buffer_, |
| 233 | buffer_id(), |
| 234 | channel_id(), |
Tianyu Jiang | 7e204b7 | 2018-10-26 15:39:18 -0700 | [diff] [blame] | 235 | client_state_mask, |
Jiwen 'Steve' Cai | 57ae3ee | 2018-05-03 17:51:52 -0700 | [diff] [blame] | 236 | acquire_fence_fd_.Borrow(), |
| 237 | release_fence_fd_.Borrow()}; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 238 | } |
| 239 | |
| 240 | Status<BufferDescription<BorrowedHandle>> ProducerChannel::OnGetBuffer( |
Corey Tabaka | d53870c | 2017-07-06 18:04:27 -0700 | [diff] [blame] | 241 | Message& /*message*/) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 242 | ATRACE_NAME("ProducerChannel::OnGetBuffer"); |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 243 | ALOGD_IF(TRACE, "ProducerChannel::OnGetBuffer: buffer=%d, state=%" PRIx32 ".", |
Tianyu Jiang | e2cdec9 | 2018-10-30 17:40:58 -0700 | [diff] [blame] | 244 | buffer_id(), buffer_state_->load(std::memory_order_acquire)); |
Tianyu Jiang | 63dd7c3 | 2018-10-30 18:35:06 -0700 | [diff] [blame] | 245 | return {GetBuffer(BufferHubDefs::kFirstClientBitMask)}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 246 | } |
| 247 | |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 248 | Status<uint32_t> ProducerChannel::CreateConsumerStateMask() { |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 249 | // Try find the next consumer state bit which has not been claimed by any |
| 250 | // consumer yet. |
Tianyu | 6705349 | 2018-10-04 14:00:22 -0700 | [diff] [blame] | 251 | // memory_order_acquire is chosen here because all writes in other threads |
| 252 | // that release active_clients_bit_mask_ need to be visible here. |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 253 | uint32_t current_active_clients_bit_mask = |
Tianyu | 6705349 | 2018-10-04 14:00:22 -0700 | [diff] [blame] | 254 | active_clients_bit_mask_->load(std::memory_order_acquire); |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 255 | uint32_t consumer_state_mask = |
Tianyu Jiang | 727ede4 | 2019-02-01 11:44:51 -0800 | [diff] [blame^] | 256 | BufferHubDefs::findNextAvailableClientStateMask( |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 257 | current_active_clients_bit_mask | orphaned_consumer_bit_mask_); |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 258 | if (consumer_state_mask == 0U) { |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 259 | ALOGE("%s: reached the maximum mumber of consumers per producer: 63.", |
| 260 | __FUNCTION__); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 261 | return ErrorStatus(E2BIG); |
| 262 | } |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 263 | uint32_t updated_active_clients_bit_mask = |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 264 | current_active_clients_bit_mask | consumer_state_mask; |
Tianyu | 6705349 | 2018-10-04 14:00:22 -0700 | [diff] [blame] | 265 | // Set the updated value only if the current value stays the same as what was |
| 266 | // read before. If the comparison succeeds, update the value without |
| 267 | // reordering anything before or after this read-modify-write in the current |
| 268 | // thread, and the modification will be visible in other threads that acquire |
| 269 | // active_clients_bit_mask_. If the comparison fails, load the result of |
| 270 | // all writes from all threads to updated_active_clients_bit_mask. |
Tianyu Jiang | 50f7ad1 | 2018-11-08 11:13:35 -0800 | [diff] [blame] | 271 | // Keep on finding the next available slient state mask until succeed or out |
| 272 | // of memory. |
| 273 | while (!active_clients_bit_mask_->compare_exchange_weak( |
| 274 | current_active_clients_bit_mask, updated_active_clients_bit_mask, |
| 275 | std::memory_order_acq_rel, std::memory_order_acquire)) { |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 276 | ALOGE("%s: Current active clients bit mask is changed to %" PRIx32 |
| 277 | ", which was expected to be %" PRIx32 |
Tianyu Jiang | 50f7ad1 | 2018-11-08 11:13:35 -0800 | [diff] [blame] | 278 | ". Trying to generate a new client state mask to resolve race " |
| 279 | "condition.", |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 280 | __FUNCTION__, updated_active_clients_bit_mask, |
| 281 | current_active_clients_bit_mask); |
Tianyu Jiang | 727ede4 | 2019-02-01 11:44:51 -0800 | [diff] [blame^] | 282 | consumer_state_mask = BufferHubDefs::findNextAvailableClientStateMask( |
Tianyu Jiang | 50f7ad1 | 2018-11-08 11:13:35 -0800 | [diff] [blame] | 283 | current_active_clients_bit_mask | orphaned_consumer_bit_mask_); |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 284 | if (consumer_state_mask == 0U) { |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 285 | ALOGE("%s: reached the maximum mumber of consumers per producer: %d.", |
| 286 | __FUNCTION__, (BufferHubDefs::kMaxNumberOfClients - 1)); |
Tianyu Jiang | 50f7ad1 | 2018-11-08 11:13:35 -0800 | [diff] [blame] | 287 | return ErrorStatus(E2BIG); |
| 288 | } |
| 289 | updated_active_clients_bit_mask = |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 290 | current_active_clients_bit_mask | consumer_state_mask; |
Tianyu | 6705349 | 2018-10-04 14:00:22 -0700 | [diff] [blame] | 291 | } |
| 292 | |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 293 | return {consumer_state_mask}; |
Tianyu Jiang | 50f7ad1 | 2018-11-08 11:13:35 -0800 | [diff] [blame] | 294 | } |
| 295 | |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 296 | void ProducerChannel::RemoveConsumerClientMask(uint32_t consumer_state_mask) { |
Tianyu Jiang | 50f7ad1 | 2018-11-08 11:13:35 -0800 | [diff] [blame] | 297 | // Clear up the buffer state and fence state in case there is already |
| 298 | // something there due to possible race condition between producer post and |
| 299 | // consumer failed to create channel. |
| 300 | buffer_state_->fetch_and(~consumer_state_mask, std::memory_order_release); |
| 301 | fence_state_->fetch_and(~consumer_state_mask, std::memory_order_release); |
| 302 | |
| 303 | // Restore the consumer state bit and make it visible in other threads that |
| 304 | // acquire the active_clients_bit_mask_. |
| 305 | active_clients_bit_mask_->fetch_and(~consumer_state_mask, |
| 306 | std::memory_order_release); |
| 307 | } |
| 308 | |
| 309 | Status<RemoteChannelHandle> ProducerChannel::CreateConsumer( |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 310 | Message& message, uint32_t consumer_state_mask) { |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 311 | ATRACE_NAME(__FUNCTION__); |
Jiwen 'Steve' Cai | 617ba80 | 2018-12-20 14:22:55 -0800 | [diff] [blame] | 312 | ALOGD("%s: buffer_id=%d", __FUNCTION__, buffer_id()); |
Tianyu Jiang | 50f7ad1 | 2018-11-08 11:13:35 -0800 | [diff] [blame] | 313 | |
| 314 | int channel_id; |
| 315 | auto status = message.PushChannel(0, nullptr, &channel_id); |
| 316 | if (!status) { |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 317 | ALOGE("%s: Failed to push consumer channel: %s", __FUNCTION__, |
| 318 | status.GetErrorMessage().c_str()); |
Tianyu Jiang | 50f7ad1 | 2018-11-08 11:13:35 -0800 | [diff] [blame] | 319 | RemoveConsumerClientMask(consumer_state_mask); |
| 320 | return ErrorStatus(ENOMEM); |
| 321 | } |
| 322 | |
| 323 | auto consumer = std::make_shared<ConsumerChannel>( |
| 324 | service(), buffer_id(), channel_id, consumer_state_mask, |
| 325 | shared_from_this()); |
Alex Vakulenko | f0a7bd0 | 2017-03-31 18:06:19 -0700 | [diff] [blame] | 326 | const auto channel_status = service()->SetChannel(channel_id, consumer); |
| 327 | if (!channel_status) { |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 328 | ALOGE("%s: failed to set new consumer channel: %s.", __FUNCTION__, |
| 329 | channel_status.GetErrorMessage().c_str()); |
Tianyu Jiang | 50f7ad1 | 2018-11-08 11:13:35 -0800 | [diff] [blame] | 330 | RemoveConsumerClientMask(consumer_state_mask); |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 331 | return ErrorStatus(ENOMEM); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 332 | } |
| 333 | |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 334 | uint32_t current_buffer_state = |
Tianyu Jiang | ca9201a | 2018-11-06 12:40:33 -0800 | [diff] [blame] | 335 | buffer_state_->load(std::memory_order_acquire); |
Tianyu Jiang | a8df5f3 | 2019-01-14 18:42:12 -0800 | [diff] [blame] | 336 | // Return the consumer channel handle without signal when adding the new |
| 337 | // consumer to a buffer that is available to producer (a.k.a a fully-released |
| 338 | // buffer) or a gained buffer. |
| 339 | if (current_buffer_state == 0U || |
Tianyu Jiang | 727ede4 | 2019-02-01 11:44:51 -0800 | [diff] [blame^] | 340 | BufferHubDefs::isAnyClientGained(current_buffer_state)) { |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 341 | return {status.take()}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 342 | } |
| 343 | |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 344 | // Signal the new consumer when adding it to a posted producer. |
| 345 | bool update_buffer_state = true; |
Tianyu Jiang | 727ede4 | 2019-02-01 11:44:51 -0800 | [diff] [blame^] | 346 | if (!BufferHubDefs::isClientPosted(current_buffer_state, |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 347 | consumer_state_mask)) { |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 348 | uint32_t updated_buffer_state = |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 349 | current_buffer_state ^ |
| 350 | (consumer_state_mask & BufferHubDefs::kHighBitsMask); |
| 351 | while (!buffer_state_->compare_exchange_weak( |
| 352 | current_buffer_state, updated_buffer_state, std::memory_order_acq_rel, |
| 353 | std::memory_order_acquire)) { |
| 354 | ALOGI( |
| 355 | "%s: Failed to post to the new consumer. " |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 356 | "Current buffer state was changed to %" PRIx32 |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 357 | " when trying to acquire the buffer and modify the buffer state to " |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 358 | "%" PRIx32 |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 359 | ". About to try again if the buffer is still not gained nor fully " |
| 360 | "released.", |
| 361 | __FUNCTION__, current_buffer_state, updated_buffer_state); |
Tianyu Jiang | a8df5f3 | 2019-01-14 18:42:12 -0800 | [diff] [blame] | 362 | if (current_buffer_state == 0U || |
Tianyu Jiang | 727ede4 | 2019-02-01 11:44:51 -0800 | [diff] [blame^] | 363 | BufferHubDefs::isAnyClientGained(current_buffer_state)) { |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 364 | ALOGI("%s: buffer is gained or fully released, state=%" PRIx32 ".", |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 365 | __FUNCTION__, current_buffer_state); |
| 366 | update_buffer_state = false; |
| 367 | break; |
| 368 | } |
| 369 | updated_buffer_state = |
| 370 | current_buffer_state ^ |
| 371 | (consumer_state_mask & BufferHubDefs::kHighBitsMask); |
| 372 | } |
| 373 | } |
Tianyu Jiang | 727ede4 | 2019-02-01 11:44:51 -0800 | [diff] [blame^] | 374 | if (update_buffer_state || BufferHubDefs::isClientPosted( |
Tianyu Jiang | e60a4ad | 2019-01-04 14:37:23 -0800 | [diff] [blame] | 375 | buffer_state_->load(std::memory_order_acquire), |
| 376 | consumer_state_mask)) { |
Tianyu Jiang | 0cdd2a0 | 2018-11-15 10:20:45 -0800 | [diff] [blame] | 377 | consumer->OnProducerPosted(); |
| 378 | } |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 379 | |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 380 | return {status.take()}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 381 | } |
| 382 | |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 383 | Status<RemoteChannelHandle> ProducerChannel::OnNewConsumer(Message& message) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 384 | ATRACE_NAME("ProducerChannel::OnNewConsumer"); |
| 385 | ALOGD_IF(TRACE, "ProducerChannel::OnNewConsumer: buffer_id=%d", buffer_id()); |
Tianyu Jiang | 50f7ad1 | 2018-11-08 11:13:35 -0800 | [diff] [blame] | 386 | auto status = CreateConsumerStateMask(); |
| 387 | if (!status.ok()) { |
| 388 | return status.error_status(); |
| 389 | } |
| 390 | return CreateConsumer(message, /*consumer_state_mask=*/status.get()); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 391 | } |
| 392 | |
Tianyu | 0c6b7ff | 2018-10-03 11:30:04 -0700 | [diff] [blame] | 393 | Status<void> ProducerChannel::OnProducerPost(Message&, |
| 394 | LocalFence acquire_fence) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 395 | ATRACE_NAME("ProducerChannel::OnProducerPost"); |
Jiwen 'Steve' Cai | 617ba80 | 2018-12-20 14:22:55 -0800 | [diff] [blame] | 396 | ALOGD("ProducerChannel::OnProducerPost: buffer_id=%d, state=0x%x", |
| 397 | buffer_id(), buffer_state_->load(std::memory_order_acquire)); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 398 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 399 | epoll_event event; |
| 400 | event.events = 0; |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 401 | event.data.u32 = 0U; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 402 | int ret = epoll_ctl(release_fence_fd_.Get(), EPOLL_CTL_MOD, |
| 403 | dummy_fence_fd_.Get(), &event); |
| 404 | ALOGE_IF(ret < 0, |
Tianyu | 0c6b7ff | 2018-10-03 11:30:04 -0700 | [diff] [blame] | 405 | "ProducerChannel::OnProducerPost: Failed to modify the shared " |
| 406 | "release fence to include the dummy fence: %s", |
| 407 | strerror(errno)); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 408 | |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 409 | eventfd_t dummy_fence_count = 0U; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 410 | if (eventfd_read(dummy_fence_fd_.Get(), &dummy_fence_count) < 0) { |
| 411 | const int error = errno; |
| 412 | if (error != EAGAIN) { |
| 413 | ALOGE( |
| 414 | "ProducerChannel::ProducerChannel: Failed to read dummy fence, " |
| 415 | "error: %s", |
| 416 | strerror(error)); |
| 417 | return ErrorStatus(error); |
| 418 | } |
Corey Tabaka | 8a4e6a9 | 2017-04-20 13:42:02 -0700 | [diff] [blame] | 419 | } |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 420 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 421 | ALOGW_IF(dummy_fence_count > 0, |
| 422 | "ProducerChannel::ProducerChannel: %" PRIu64 |
| 423 | " dummy fence(s) was signaled during last release/gain cycle " |
| 424 | "buffer_id=%d.", |
| 425 | dummy_fence_count, buffer_id()); |
| 426 | |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 427 | post_fence_ = std::move(acquire_fence); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 428 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 429 | // Signal any interested consumers. If there are none, the buffer will stay |
| 430 | // in posted state until a consumer comes online. This behavior guarantees |
| 431 | // that no frame is silently dropped. |
Tianyu Jiang | ae9668c | 2018-12-07 15:14:47 -0800 | [diff] [blame] | 432 | for (auto& consumer : consumer_channels_) { |
Tianyu Jiang | 0cdd2a0 | 2018-11-15 10:20:45 -0800 | [diff] [blame] | 433 | consumer->OnProducerPosted(); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 434 | } |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 435 | |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 436 | return {}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 437 | } |
| 438 | |
Corey Tabaka | d53870c | 2017-07-06 18:04:27 -0700 | [diff] [blame] | 439 | Status<LocalFence> ProducerChannel::OnProducerGain(Message& /*message*/) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 440 | ATRACE_NAME("ProducerChannel::OnGain"); |
Jiwen 'Steve' Cai | 617ba80 | 2018-12-20 14:22:55 -0800 | [diff] [blame] | 441 | ALOGW("ProducerChannel::OnGain: buffer_id=%d", buffer_id()); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 442 | |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 443 | ClearAvailable(); |
Alex Vakulenko | 052f3ae | 2017-03-31 09:10:43 -0700 | [diff] [blame] | 444 | post_fence_.close(); |
Tianyu Jiang | ae9668c | 2018-12-07 15:14:47 -0800 | [diff] [blame] | 445 | for (auto& consumer : consumer_channels_) { |
| 446 | consumer->OnProducerGained(); |
| 447 | } |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 448 | return {std::move(returned_fence_)}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 449 | } |
| 450 | |
Fan Xu | b0eec51 | 2018-10-30 11:33:15 -0700 | [diff] [blame] | 451 | // TODO(b/112338294) Keep here for reference. Remove it after new logic is |
| 452 | // written. |
| 453 | /* Status<RemoteChannelHandle> ProducerChannel::OnProducerDetach( |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 454 | Message& message) { |
| 455 | ATRACE_NAME("ProducerChannel::OnProducerDetach"); |
| 456 | ALOGD_IF(TRACE, "ProducerChannel::OnProducerDetach: buffer_id=%d", |
| 457 | buffer_id()); |
| 458 | |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 459 | uint32_t buffer_state = buffer_state_->load(std::memory_order_acquire); |
Tianyu Jiang | 727ede4 | 2019-02-01 11:44:51 -0800 | [diff] [blame^] | 460 | if (!BufferHubDefs::isClientGained( |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 461 | buffer_state, BufferHubDefs::kFirstClientStateMask)) { |
Jiwen 'Steve' Cai | 1c73024 | 2018-12-31 18:40:02 -0800 | [diff] [blame] | 462 | // Can only detach a ProducerBuffer when it's in gained state. |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 463 | ALOGW( |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 464 | "ProducerChannel::OnProducerDetach: The buffer (id=%d, state=%" |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 465 | PRIx32 |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 466 | ") is not in gained state.", |
| 467 | buffer_id(), buffer_state); |
| 468 | return {}; |
| 469 | } |
| 470 | |
| 471 | int channel_id; |
| 472 | auto status = message.PushChannel(0, nullptr, &channel_id); |
| 473 | if (!status) { |
| 474 | ALOGE( |
| 475 | "ProducerChannel::OnProducerDetach: Failed to push detached buffer " |
| 476 | "channel: %s", |
| 477 | status.GetErrorMessage().c_str()); |
| 478 | return ErrorStatus(ENOMEM); |
| 479 | } |
| 480 | |
| 481 | // Make sure we unlock the buffer. |
| 482 | if (int ret = metadata_buffer_.Unlock()) { |
| 483 | ALOGE("ProducerChannel::OnProducerDetach: Failed to unlock metadata."); |
| 484 | return ErrorStatus(-ret); |
| 485 | }; |
| 486 | |
Jiwen 'Steve' Cai | 9004b8c | 2018-10-03 18:52:23 -0700 | [diff] [blame] | 487 | std::unique_ptr<BufferChannel> channel = |
| 488 | BufferChannel::Create(service(), buffer_id(), channel_id, |
| 489 | std::move(buffer_), user_metadata_size_); |
Jiwen 'Steve' Cai | a8049a2 | 2018-03-28 15:14:02 -0700 | [diff] [blame] | 490 | if (!channel) { |
| 491 | ALOGE("ProducerChannel::OnProducerDetach: Invalid buffer."); |
| 492 | return ErrorStatus(EINVAL); |
| 493 | } |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 494 | |
Jiwen 'Steve' Cai | a8049a2 | 2018-03-28 15:14:02 -0700 | [diff] [blame] | 495 | const auto channel_status = |
| 496 | service()->SetChannel(channel_id, std::move(channel)); |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 497 | if (!channel_status) { |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 498 | // Technically, this should never fail, as we just pushed the channel. |
| 499 | // 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] | 500 | LOG_FATAL( |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 501 | "ProducerChannel::OnProducerDetach: Failed to set new detached " |
| 502 | "buffer channel: %s.", channel_status.GetErrorMessage().c_str()); |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 503 | } |
| 504 | |
| 505 | return status; |
Fan Xu | b0eec51 | 2018-10-30 11:33:15 -0700 | [diff] [blame] | 506 | } */ |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 507 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 508 | Status<LocalFence> ProducerChannel::OnConsumerAcquire(Message& /*message*/) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 509 | ATRACE_NAME("ProducerChannel::OnConsumerAcquire"); |
| 510 | ALOGD_IF(TRACE, "ProducerChannel::OnConsumerAcquire: buffer_id=%d", |
| 511 | buffer_id()); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 512 | |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 513 | // Return a borrowed fd to avoid unnecessary duplication of the underlying |
| 514 | // fd. Serialization just needs to read the handle. |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 515 | return {std::move(post_fence_)}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 516 | } |
| 517 | |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 518 | Status<void> ProducerChannel::OnConsumerRelease(Message&, |
| 519 | LocalFence release_fence) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 520 | ATRACE_NAME("ProducerChannel::OnConsumerRelease"); |
| 521 | ALOGD_IF(TRACE, "ProducerChannel::OnConsumerRelease: buffer_id=%d", |
| 522 | buffer_id()); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 523 | |
| 524 | // Attempt to merge the fences if necessary. |
| 525 | if (release_fence) { |
| 526 | if (returned_fence_) { |
Corey Tabaka | 3079cb7 | 2017-01-19 15:07:26 -0800 | [diff] [blame] | 527 | LocalFence merged_fence(sync_merge("bufferhub_merged", |
| 528 | returned_fence_.get_fd(), |
| 529 | release_fence.get_fd())); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 530 | const int error = errno; |
| 531 | if (!merged_fence) { |
| 532 | ALOGE("ProducerChannel::OnConsumerRelease: Failed to merge fences: %s", |
| 533 | strerror(error)); |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 534 | return ErrorStatus(error); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 535 | } |
| 536 | returned_fence_ = std::move(merged_fence); |
| 537 | } else { |
| 538 | returned_fence_ = std::move(release_fence); |
| 539 | } |
| 540 | } |
| 541 | |
Tianyu Jiang | a8df5f3 | 2019-01-14 18:42:12 -0800 | [diff] [blame] | 542 | if (IsBufferReleasedByAllActiveClientsExceptForOrphans()) { |
Tianyu Jiang | e60a4ad | 2019-01-04 14:37:23 -0800 | [diff] [blame] | 543 | buffer_state_->store(0U); |
Tianyu Jiang | 0cdd2a0 | 2018-11-15 10:20:45 -0800 | [diff] [blame] | 544 | SignalAvailable(); |
| 545 | if (orphaned_consumer_bit_mask_) { |
| 546 | ALOGW( |
| 547 | "%s: orphaned buffer detected during the this acquire/release cycle: " |
Jiwen 'Steve' Cai | 617ba80 | 2018-12-20 14:22:55 -0800 | [diff] [blame] | 548 | "id=%d orphaned=0x%" PRIx32 " queue_index=%" PRId64 ".", |
Tianyu Jiang | 0cdd2a0 | 2018-11-15 10:20:45 -0800 | [diff] [blame] | 549 | __FUNCTION__, buffer_id(), orphaned_consumer_bit_mask_, |
| 550 | metadata_header_->queue_index); |
| 551 | orphaned_consumer_bit_mask_ = 0; |
| 552 | } |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 553 | } |
| 554 | |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 555 | return {}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 556 | } |
| 557 | |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 558 | void ProducerChannel::OnConsumerOrphaned(const uint32_t& consumer_state_mask) { |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 559 | // Remember the ignored consumer so that newly added consumer won't be |
| 560 | // taking the same state mask as this orphaned consumer. |
| 561 | ALOGE_IF(orphaned_consumer_bit_mask_ & consumer_state_mask, |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 562 | "%s: Consumer (consumer_state_mask=%" PRIx32 |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 563 | ") is already orphaned.", |
| 564 | __FUNCTION__, consumer_state_mask); |
| 565 | orphaned_consumer_bit_mask_ |= consumer_state_mask; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 566 | |
Tianyu Jiang | a8df5f3 | 2019-01-14 18:42:12 -0800 | [diff] [blame] | 567 | if (IsBufferReleasedByAllActiveClientsExceptForOrphans()) { |
Tianyu Jiang | e60a4ad | 2019-01-04 14:37:23 -0800 | [diff] [blame] | 568 | buffer_state_->store(0U); |
Tianyu Jiang | 0cdd2a0 | 2018-11-15 10:20:45 -0800 | [diff] [blame] | 569 | SignalAvailable(); |
| 570 | } |
| 571 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 572 | // Atomically clear the fence state bit as an orphaned consumer will never |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 573 | // signal a release fence. |
| 574 | fence_state_->fetch_and(~consumer_state_mask, std::memory_order_release); |
| 575 | |
| 576 | // Atomically set the buffer state of this consumer to released state. |
| 577 | buffer_state_->fetch_and(~consumer_state_mask, std::memory_order_release); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 578 | |
| 579 | ALOGW( |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 580 | "%s: detected new orphaned consumer buffer_id=%d " |
Jiwen 'Steve' Cai | 617ba80 | 2018-12-20 14:22:55 -0800 | [diff] [blame] | 581 | "consumer_state_mask=%" PRIx32 " queue_index=%" PRId64 |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 582 | " buffer_state=%" PRIx32 " fence_state=%" PRIx32 ".", |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 583 | __FUNCTION__, buffer_id(), consumer_state_mask, |
| 584 | metadata_header_->queue_index, |
Tianyu Jiang | e2cdec9 | 2018-10-30 17:40:58 -0700 | [diff] [blame] | 585 | buffer_state_->load(std::memory_order_acquire), |
| 586 | fence_state_->load(std::memory_order_acquire)); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 587 | } |
| 588 | |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 589 | void ProducerChannel::AddConsumer(ConsumerChannel* channel) { |
| 590 | consumer_channels_.push_back(channel); |
| 591 | } |
| 592 | |
| 593 | void ProducerChannel::RemoveConsumer(ConsumerChannel* channel) { |
| 594 | consumer_channels_.erase( |
| 595 | std::find(consumer_channels_.begin(), consumer_channels_.end(), channel)); |
Tianyu | 6705349 | 2018-10-04 14:00:22 -0700 | [diff] [blame] | 596 | // Restore the consumer state bit and make it visible in other threads that |
| 597 | // acquire the active_clients_bit_mask_. |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 598 | uint32_t consumer_state_mask = channel->client_state_mask(); |
| 599 | uint32_t current_active_clients_bit_mask = |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 600 | active_clients_bit_mask_->load(std::memory_order_acquire); |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 601 | uint32_t updated_active_clients_bit_mask = |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 602 | current_active_clients_bit_mask & (~consumer_state_mask); |
| 603 | while (!active_clients_bit_mask_->compare_exchange_weak( |
| 604 | current_active_clients_bit_mask, updated_active_clients_bit_mask, |
| 605 | std::memory_order_acq_rel, std::memory_order_acquire)) { |
| 606 | ALOGI( |
| 607 | "%s: Failed to remove consumer state mask. Current active clients bit " |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 608 | "mask is changed to %" PRIx32 |
| 609 | " when trying to acquire and modify it to %" PRIx32 |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 610 | ". About to try again.", |
| 611 | __FUNCTION__, current_active_clients_bit_mask, |
| 612 | updated_active_clients_bit_mask); |
| 613 | updated_active_clients_bit_mask = |
| 614 | current_active_clients_bit_mask & (~consumer_state_mask); |
| 615 | } |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 616 | |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 617 | const uint32_t current_buffer_state = |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 618 | buffer_state_->load(std::memory_order_acquire); |
Tianyu Jiang | 727ede4 | 2019-02-01 11:44:51 -0800 | [diff] [blame^] | 619 | if (BufferHubDefs::isClientPosted(current_buffer_state, |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 620 | consumer_state_mask) || |
Tianyu Jiang | 727ede4 | 2019-02-01 11:44:51 -0800 | [diff] [blame^] | 621 | BufferHubDefs::isClientAcquired(current_buffer_state, |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 622 | consumer_state_mask)) { |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 623 | // The consumer client is being destoryed without releasing. This could |
| 624 | // happen in corner cases when the consumer crashes. Here we mark it |
| 625 | // orphaned before remove it from producer. |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 626 | OnConsumerOrphaned(consumer_state_mask); |
| 627 | return; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 628 | } |
| 629 | |
Tianyu Jiang | 727ede4 | 2019-02-01 11:44:51 -0800 | [diff] [blame^] | 630 | if (BufferHubDefs::isClientReleased(current_buffer_state, |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 631 | consumer_state_mask) || |
Tianyu Jiang | 727ede4 | 2019-02-01 11:44:51 -0800 | [diff] [blame^] | 632 | BufferHubDefs::isAnyClientGained(current_buffer_state)) { |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 633 | // The consumer is being close while it is suppose to signal a release |
| 634 | // fence. Signal the dummy fence here. |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 635 | if (fence_state_->load(std::memory_order_acquire) & consumer_state_mask) { |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 636 | epoll_event event; |
| 637 | event.events = EPOLLIN; |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 638 | event.data.u32 = consumer_state_mask; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 639 | if (epoll_ctl(release_fence_fd_.Get(), EPOLL_CTL_MOD, |
| 640 | dummy_fence_fd_.Get(), &event) < 0) { |
| 641 | ALOGE( |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 642 | "%s: Failed to modify the shared release fence to include the " |
| 643 | "dummy fence: %s", |
| 644 | __FUNCTION__, strerror(errno)); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 645 | return; |
| 646 | } |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 647 | ALOGW("%s: signal dummy release fence buffer_id=%d", __FUNCTION__, |
| 648 | buffer_id()); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 649 | eventfd_write(dummy_fence_fd_.Get(), 1); |
| 650 | } |
| 651 | } |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 652 | } |
| 653 | |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 654 | // Returns true if the given parameters match the underlying buffer |
| 655 | // parameters. |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 656 | bool ProducerChannel::CheckParameters(uint32_t width, uint32_t height, |
Hendrik Wagenaar | 108e84f | 2017-05-07 22:19:17 -0700 | [diff] [blame] | 657 | uint32_t layer_count, uint32_t format, |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 658 | uint64_t usage, |
Tianyu Jiang | a8df5f3 | 2019-01-14 18:42:12 -0800 | [diff] [blame] | 659 | size_t user_metadata_size) const { |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 660 | return user_metadata_size == user_metadata_size_ && |
| 661 | buffer_.width() == width && buffer_.height() == height && |
| 662 | buffer_.layer_count() == layer_count && buffer_.format() == format && |
| 663 | buffer_.usage() == usage; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 664 | } |
| 665 | |
Tianyu Jiang | a8df5f3 | 2019-01-14 18:42:12 -0800 | [diff] [blame] | 666 | bool ProducerChannel::IsBufferReleasedByAllActiveClientsExceptForOrphans() |
| 667 | const { |
| 668 | return (buffer_state_->load(std::memory_order_acquire) & |
| 669 | ~orphaned_consumer_bit_mask_ & |
| 670 | active_clients_bit_mask_->load(std::memory_order_acquire)) == 0U; |
| 671 | } |
| 672 | |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 673 | } // namespace dvr |
| 674 | } // namespace android |