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), |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 59 | user_metadata_size_(user_metadata_size), |
| 60 | metadata_buf_size_(BufferHubDefs::kMetadataHeaderSize + |
| 61 | user_metadata_size) { |
| 62 | if (int ret = buffer_.Alloc(width, height, layer_count, format, usage)) { |
Hendrik Wagenaar | 4d3590f | 2017-05-06 22:36:04 -0700 | [diff] [blame] | 63 | ALOGE("ProducerChannel::ProducerChannel: Failed to allocate buffer: %s", |
| 64 | strerror(-ret)); |
| 65 | *error = ret; |
| 66 | return; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 67 | } |
| 68 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 69 | if (int ret = metadata_buffer_.Alloc(metadata_buf_size_, /*height=*/1, |
| 70 | /*layer_count=*/1, |
| 71 | BufferHubDefs::kMetadataFormat, |
| 72 | BufferHubDefs::kMetadataUsage)) { |
| 73 | ALOGE("ProducerChannel::ProducerChannel: Failed to allocate metadata: %s", |
| 74 | strerror(-ret)); |
| 75 | *error = ret; |
| 76 | return; |
| 77 | } |
| 78 | |
Jiwen 'Steve' Cai | 0728fa9 | 2018-04-24 19:03:14 -0700 | [diff] [blame] | 79 | *error = InitializeBuffer(); |
| 80 | } |
| 81 | |
| 82 | int ProducerChannel::InitializeBuffer() { |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 83 | void* metadata_ptr = nullptr; |
| 84 | if (int ret = metadata_buffer_.Lock(BufferHubDefs::kMetadataUsage, /*x=*/0, |
| 85 | /*y=*/0, metadata_buf_size_, |
| 86 | /*height=*/1, &metadata_ptr)) { |
| 87 | ALOGE("ProducerChannel::ProducerChannel: Failed to lock metadata."); |
Jiwen 'Steve' Cai | 0728fa9 | 2018-04-24 19:03:14 -0700 | [diff] [blame] | 88 | return ret; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 89 | } |
| 90 | metadata_header_ = |
| 91 | reinterpret_cast<BufferHubDefs::MetadataHeader*>(metadata_ptr); |
| 92 | |
| 93 | // Using placement new here to reuse shared memory instead of new allocation |
| 94 | // and also initialize the value to zero. |
| 95 | buffer_state_ = |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 96 | new (&metadata_header_->buffer_state) std::atomic<uint32_t>(0); |
| 97 | fence_state_ = new (&metadata_header_->fence_state) std::atomic<uint32_t>(0); |
Tianyu | 6705349 | 2018-10-04 14:00:22 -0700 | [diff] [blame] | 98 | active_clients_bit_mask_ = |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 99 | new (&metadata_header_->active_clients_bit_mask) std::atomic<uint32_t>(0); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 100 | |
Tianyu Jiang | 63dd7c3 | 2018-10-30 18:35:06 -0700 | [diff] [blame] | 101 | // Producer channel is never created after consumer channel, and one buffer |
| 102 | // only have one fixed producer for now. Thus, it is correct to assume |
| 103 | // producer state bit is kFirstClientBitMask for now. |
| 104 | active_clients_bit_mask_->store(BufferHubDefs::kFirstClientBitMask, |
| 105 | std::memory_order_release); |
| 106 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 107 | acquire_fence_fd_.Reset(epoll_create1(EPOLL_CLOEXEC)); |
| 108 | release_fence_fd_.Reset(epoll_create1(EPOLL_CLOEXEC)); |
| 109 | if (!acquire_fence_fd_ || !release_fence_fd_) { |
| 110 | ALOGE("ProducerChannel::ProducerChannel: Failed to create shared fences."); |
Jiwen 'Steve' Cai | 0728fa9 | 2018-04-24 19:03:14 -0700 | [diff] [blame] | 111 | return -EIO; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 112 | } |
| 113 | |
| 114 | dummy_fence_fd_.Reset(eventfd(0, EFD_CLOEXEC | EFD_NONBLOCK)); |
| 115 | if (!dummy_fence_fd_) { |
| 116 | ALOGE("ProducerChannel::ProducerChannel: Failed to create dummy fences."); |
Jiwen 'Steve' Cai | 0728fa9 | 2018-04-24 19:03:14 -0700 | [diff] [blame] | 117 | return EIO; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 118 | } |
| 119 | |
| 120 | epoll_event event; |
| 121 | event.events = 0; |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 122 | event.data.u32 = 0U; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 123 | if (epoll_ctl(release_fence_fd_.Get(), EPOLL_CTL_ADD, dummy_fence_fd_.Get(), |
| 124 | &event) < 0) { |
| 125 | ALOGE( |
| 126 | "ProducerChannel::ProducerChannel: Failed to modify the shared " |
| 127 | "release fence to include the dummy fence: %s", |
| 128 | strerror(errno)); |
Jiwen 'Steve' Cai | 0728fa9 | 2018-04-24 19:03:14 -0700 | [diff] [blame] | 129 | return -EIO; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 130 | } |
| 131 | |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 132 | // Success. |
Jiwen 'Steve' Cai | 0728fa9 | 2018-04-24 19:03:14 -0700 | [diff] [blame] | 133 | return 0; |
| 134 | } |
| 135 | |
| 136 | std::unique_ptr<ProducerChannel> ProducerChannel::Create( |
| 137 | BufferHubService* service, int buffer_id, int channel_id, IonBuffer buffer, |
| 138 | IonBuffer metadata_buffer, size_t user_metadata_size) { |
| 139 | int error = 0; |
| 140 | std::unique_ptr<ProducerChannel> producer(new ProducerChannel( |
| 141 | service, buffer_id, channel_id, std::move(buffer), |
| 142 | std::move(metadata_buffer), user_metadata_size, &error)); |
| 143 | |
| 144 | if (error < 0) |
| 145 | return nullptr; |
| 146 | else |
| 147 | return producer; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 148 | } |
| 149 | |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 150 | Status<std::shared_ptr<ProducerChannel>> ProducerChannel::Create( |
| 151 | BufferHubService* service, int channel_id, uint32_t width, uint32_t height, |
Hendrik Wagenaar | 108e84f | 2017-05-07 22:19:17 -0700 | [diff] [blame] | 152 | uint32_t layer_count, uint32_t format, uint64_t usage, |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 153 | size_t user_metadata_size) { |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 154 | int error; |
Jiwen 'Steve' Cai | 0057fdd | 2017-05-02 11:21:18 -0700 | [diff] [blame] | 155 | std::shared_ptr<ProducerChannel> producer( |
Hendrik Wagenaar | 108e84f | 2017-05-07 22:19:17 -0700 | [diff] [blame] | 156 | new ProducerChannel(service, channel_id, width, height, layer_count, |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 157 | format, usage, user_metadata_size, &error)); |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 158 | if (error < 0) |
| 159 | return ErrorStatus(-error); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 160 | else |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 161 | return {std::move(producer)}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 162 | } |
| 163 | |
| 164 | ProducerChannel::~ProducerChannel() { |
Corey Tabaka | 3079cb7 | 2017-01-19 15:07:26 -0800 | [diff] [blame] | 165 | ALOGD_IF(TRACE, |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 166 | "ProducerChannel::~ProducerChannel: channel_id=%d buffer_id=%d " |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 167 | "state=%" PRIx32 ".", |
Tianyu Jiang | e2cdec9 | 2018-10-30 17:40:58 -0700 | [diff] [blame] | 168 | channel_id(), buffer_id(), |
| 169 | buffer_state_->load(std::memory_order_acquire)); |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 170 | for (auto consumer : consumer_channels_) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 171 | consumer->OnProducerClosed(); |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 172 | } |
| 173 | Hangup(); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 174 | } |
| 175 | |
| 176 | BufferHubChannel::BufferInfo ProducerChannel::GetBufferInfo() const { |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 177 | // Derive the mask of signaled buffers in this producer / consumer set. |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 178 | uint32_t signaled_mask = signaled() ? BufferHubDefs::kFirstClientBitMask : 0; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 179 | for (const ConsumerChannel* consumer : consumer_channels_) { |
Tianyu Jiang | 83a991f | 2018-10-30 16:59:29 -0700 | [diff] [blame] | 180 | signaled_mask |= consumer->signaled() ? consumer->client_state_mask() : 0; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 181 | } |
| 182 | |
Hendrik Wagenaar | 4d3590f | 2017-05-06 22:36:04 -0700 | [diff] [blame] | 183 | return BufferInfo(buffer_id(), consumer_channels_.size(), buffer_.width(), |
Hendrik Wagenaar | 108e84f | 2017-05-07 22:19:17 -0700 | [diff] [blame] | 184 | buffer_.height(), buffer_.layer_count(), buffer_.format(), |
Tianyu Jiang | 0cdd2a0 | 2018-11-15 10:20:45 -0800 | [diff] [blame] | 185 | buffer_.usage(), |
Tianyu Jiang | e2cdec9 | 2018-10-30 17:40:58 -0700 | [diff] [blame] | 186 | buffer_state_->load(std::memory_order_acquire), |
Jiwen 'Steve' Cai | 2f26033 | 2018-02-15 18:39:47 -0800 | [diff] [blame] | 187 | signaled_mask, metadata_header_->queue_index); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 188 | } |
| 189 | |
| 190 | void ProducerChannel::HandleImpulse(Message& message) { |
| 191 | ATRACE_NAME("ProducerChannel::HandleImpulse"); |
| 192 | switch (message.GetOp()) { |
| 193 | case BufferHubRPC::ProducerGain::Opcode: |
| 194 | OnProducerGain(message); |
| 195 | break; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 196 | case BufferHubRPC::ProducerPost::Opcode: |
| 197 | OnProducerPost(message, {}); |
| 198 | break; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 199 | } |
| 200 | } |
| 201 | |
| 202 | bool ProducerChannel::HandleMessage(Message& message) { |
| 203 | ATRACE_NAME("ProducerChannel::HandleMessage"); |
| 204 | switch (message.GetOp()) { |
| 205 | case BufferHubRPC::GetBuffer::Opcode: |
| 206 | DispatchRemoteMethod<BufferHubRPC::GetBuffer>( |
| 207 | *this, &ProducerChannel::OnGetBuffer, message); |
| 208 | return true; |
| 209 | |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 210 | case BufferHubRPC::NewConsumer::Opcode: |
| 211 | DispatchRemoteMethod<BufferHubRPC::NewConsumer>( |
| 212 | *this, &ProducerChannel::OnNewConsumer, message); |
| 213 | return true; |
| 214 | |
| 215 | case BufferHubRPC::ProducerPost::Opcode: |
| 216 | DispatchRemoteMethod<BufferHubRPC::ProducerPost>( |
| 217 | *this, &ProducerChannel::OnProducerPost, message); |
| 218 | return true; |
| 219 | |
| 220 | case BufferHubRPC::ProducerGain::Opcode: |
| 221 | DispatchRemoteMethod<BufferHubRPC::ProducerGain>( |
| 222 | *this, &ProducerChannel::OnProducerGain, message); |
| 223 | return true; |
| 224 | |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 225 | default: |
| 226 | return false; |
| 227 | } |
| 228 | } |
| 229 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 230 | BufferDescription<BorrowedHandle> ProducerChannel::GetBuffer( |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 231 | uint32_t client_state_mask) { |
Jiwen 'Steve' Cai | 57ae3ee | 2018-05-03 17:51:52 -0700 | [diff] [blame] | 232 | return {buffer_, |
| 233 | metadata_buffer_, |
| 234 | buffer_id(), |
| 235 | channel_id(), |
Tianyu Jiang | 7e204b7 | 2018-10-26 15:39:18 -0700 | [diff] [blame] | 236 | client_state_mask, |
Jiwen 'Steve' Cai | 57ae3ee | 2018-05-03 17:51:52 -0700 | [diff] [blame] | 237 | acquire_fence_fd_.Borrow(), |
| 238 | release_fence_fd_.Borrow()}; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 239 | } |
| 240 | |
| 241 | Status<BufferDescription<BorrowedHandle>> ProducerChannel::OnGetBuffer( |
Corey Tabaka | d53870c | 2017-07-06 18:04:27 -0700 | [diff] [blame] | 242 | Message& /*message*/) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 243 | ATRACE_NAME("ProducerChannel::OnGetBuffer"); |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 244 | ALOGD_IF(TRACE, "ProducerChannel::OnGetBuffer: buffer=%d, state=%" PRIx32 ".", |
Tianyu Jiang | e2cdec9 | 2018-10-30 17:40:58 -0700 | [diff] [blame] | 245 | buffer_id(), buffer_state_->load(std::memory_order_acquire)); |
Tianyu Jiang | 63dd7c3 | 2018-10-30 18:35:06 -0700 | [diff] [blame] | 246 | return {GetBuffer(BufferHubDefs::kFirstClientBitMask)}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 247 | } |
| 248 | |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 249 | Status<uint32_t> ProducerChannel::CreateConsumerStateMask() { |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 250 | // Try find the next consumer state bit which has not been claimed by any |
| 251 | // consumer yet. |
Tianyu | 6705349 | 2018-10-04 14:00:22 -0700 | [diff] [blame] | 252 | // memory_order_acquire is chosen here because all writes in other threads |
| 253 | // that release active_clients_bit_mask_ need to be visible here. |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 254 | uint32_t current_active_clients_bit_mask = |
Tianyu | 6705349 | 2018-10-04 14:00:22 -0700 | [diff] [blame] | 255 | active_clients_bit_mask_->load(std::memory_order_acquire); |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 256 | uint32_t consumer_state_mask = |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 257 | BufferHubDefs::FindNextAvailableClientStateMask( |
| 258 | current_active_clients_bit_mask | orphaned_consumer_bit_mask_); |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 259 | if (consumer_state_mask == 0U) { |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 260 | ALOGE("%s: reached the maximum mumber of consumers per producer: 63.", |
| 261 | __FUNCTION__); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 262 | return ErrorStatus(E2BIG); |
| 263 | } |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 264 | uint32_t updated_active_clients_bit_mask = |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 265 | current_active_clients_bit_mask | consumer_state_mask; |
Tianyu | 6705349 | 2018-10-04 14:00:22 -0700 | [diff] [blame] | 266 | // Set the updated value only if the current value stays the same as what was |
| 267 | // read before. If the comparison succeeds, update the value without |
| 268 | // reordering anything before or after this read-modify-write in the current |
| 269 | // thread, and the modification will be visible in other threads that acquire |
| 270 | // active_clients_bit_mask_. If the comparison fails, load the result of |
| 271 | // all writes from all threads to updated_active_clients_bit_mask. |
Tianyu Jiang | 50f7ad1 | 2018-11-08 11:13:35 -0800 | [diff] [blame] | 272 | // Keep on finding the next available slient state mask until succeed or out |
| 273 | // of memory. |
| 274 | while (!active_clients_bit_mask_->compare_exchange_weak( |
| 275 | current_active_clients_bit_mask, updated_active_clients_bit_mask, |
| 276 | std::memory_order_acq_rel, std::memory_order_acquire)) { |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 277 | ALOGE("%s: Current active clients bit mask is changed to %" PRIx32 |
| 278 | ", which was expected to be %" PRIx32 |
Tianyu Jiang | 50f7ad1 | 2018-11-08 11:13:35 -0800 | [diff] [blame] | 279 | ". Trying to generate a new client state mask to resolve race " |
| 280 | "condition.", |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 281 | __FUNCTION__, updated_active_clients_bit_mask, |
| 282 | current_active_clients_bit_mask); |
| 283 | consumer_state_mask = BufferHubDefs::FindNextAvailableClientStateMask( |
Tianyu Jiang | 50f7ad1 | 2018-11-08 11:13:35 -0800 | [diff] [blame] | 284 | current_active_clients_bit_mask | orphaned_consumer_bit_mask_); |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 285 | if (consumer_state_mask == 0U) { |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 286 | ALOGE("%s: reached the maximum mumber of consumers per producer: %d.", |
| 287 | __FUNCTION__, (BufferHubDefs::kMaxNumberOfClients - 1)); |
Tianyu Jiang | 50f7ad1 | 2018-11-08 11:13:35 -0800 | [diff] [blame] | 288 | return ErrorStatus(E2BIG); |
| 289 | } |
| 290 | updated_active_clients_bit_mask = |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 291 | current_active_clients_bit_mask | consumer_state_mask; |
Tianyu | 6705349 | 2018-10-04 14:00:22 -0700 | [diff] [blame] | 292 | } |
| 293 | |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 294 | return {consumer_state_mask}; |
Tianyu Jiang | 50f7ad1 | 2018-11-08 11:13:35 -0800 | [diff] [blame] | 295 | } |
| 296 | |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 297 | void ProducerChannel::RemoveConsumerClientMask(uint32_t consumer_state_mask) { |
Tianyu Jiang | 50f7ad1 | 2018-11-08 11:13:35 -0800 | [diff] [blame] | 298 | // Clear up the buffer state and fence state in case there is already |
| 299 | // something there due to possible race condition between producer post and |
| 300 | // consumer failed to create channel. |
| 301 | buffer_state_->fetch_and(~consumer_state_mask, std::memory_order_release); |
| 302 | fence_state_->fetch_and(~consumer_state_mask, std::memory_order_release); |
| 303 | |
| 304 | // Restore the consumer state bit and make it visible in other threads that |
| 305 | // acquire the active_clients_bit_mask_. |
| 306 | active_clients_bit_mask_->fetch_and(~consumer_state_mask, |
| 307 | std::memory_order_release); |
| 308 | } |
| 309 | |
| 310 | Status<RemoteChannelHandle> ProducerChannel::CreateConsumer( |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 311 | Message& message, uint32_t consumer_state_mask) { |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 312 | ATRACE_NAME(__FUNCTION__); |
Jiwen 'Steve' Cai | 617ba80 | 2018-12-20 14:22:55 -0800 | [diff] [blame] | 313 | ALOGD("%s: buffer_id=%d", __FUNCTION__, buffer_id()); |
Tianyu Jiang | 50f7ad1 | 2018-11-08 11:13:35 -0800 | [diff] [blame] | 314 | |
| 315 | int channel_id; |
| 316 | auto status = message.PushChannel(0, nullptr, &channel_id); |
| 317 | if (!status) { |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 318 | ALOGE("%s: Failed to push consumer channel: %s", __FUNCTION__, |
| 319 | status.GetErrorMessage().c_str()); |
Tianyu Jiang | 50f7ad1 | 2018-11-08 11:13:35 -0800 | [diff] [blame] | 320 | RemoveConsumerClientMask(consumer_state_mask); |
| 321 | return ErrorStatus(ENOMEM); |
| 322 | } |
| 323 | |
| 324 | auto consumer = std::make_shared<ConsumerChannel>( |
| 325 | service(), buffer_id(), channel_id, consumer_state_mask, |
| 326 | shared_from_this()); |
Alex Vakulenko | f0a7bd0 | 2017-03-31 18:06:19 -0700 | [diff] [blame] | 327 | const auto channel_status = service()->SetChannel(channel_id, consumer); |
| 328 | if (!channel_status) { |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 329 | ALOGE("%s: failed to set new consumer channel: %s.", __FUNCTION__, |
| 330 | channel_status.GetErrorMessage().c_str()); |
Tianyu Jiang | 50f7ad1 | 2018-11-08 11:13:35 -0800 | [diff] [blame] | 331 | RemoveConsumerClientMask(consumer_state_mask); |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 332 | return ErrorStatus(ENOMEM); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 333 | } |
| 334 | |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 335 | uint32_t current_buffer_state = |
Tianyu Jiang | ca9201a | 2018-11-06 12:40:33 -0800 | [diff] [blame] | 336 | buffer_state_->load(std::memory_order_acquire); |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 337 | if (BufferHubDefs::IsBufferReleased(current_buffer_state) || |
| 338 | BufferHubDefs::AnyClientGained(current_buffer_state)) { |
| 339 | return {status.take()}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 340 | } |
| 341 | |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 342 | // Signal the new consumer when adding it to a posted producer. |
| 343 | bool update_buffer_state = true; |
| 344 | if (!BufferHubDefs::IsClientPosted(current_buffer_state, |
| 345 | consumer_state_mask)) { |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 346 | uint32_t updated_buffer_state = |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 347 | current_buffer_state ^ |
| 348 | (consumer_state_mask & BufferHubDefs::kHighBitsMask); |
| 349 | while (!buffer_state_->compare_exchange_weak( |
| 350 | current_buffer_state, updated_buffer_state, std::memory_order_acq_rel, |
| 351 | std::memory_order_acquire)) { |
| 352 | ALOGI( |
| 353 | "%s: Failed to post to the new consumer. " |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 354 | "Current buffer state was changed to %" PRIx32 |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 355 | " when trying to acquire the buffer and modify the buffer state to " |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 356 | "%" PRIx32 |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 357 | ". About to try again if the buffer is still not gained nor fully " |
| 358 | "released.", |
| 359 | __FUNCTION__, current_buffer_state, updated_buffer_state); |
| 360 | if (BufferHubDefs::IsBufferReleased(current_buffer_state) || |
| 361 | BufferHubDefs::AnyClientGained(current_buffer_state)) { |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 362 | ALOGI("%s: buffer is gained or fully released, state=%" PRIx32 ".", |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 363 | __FUNCTION__, current_buffer_state); |
| 364 | update_buffer_state = false; |
| 365 | break; |
| 366 | } |
| 367 | updated_buffer_state = |
| 368 | current_buffer_state ^ |
| 369 | (consumer_state_mask & BufferHubDefs::kHighBitsMask); |
| 370 | } |
| 371 | } |
Tianyu Jiang | e60a4ad | 2019-01-04 14:37:23 -0800 | [diff] [blame^] | 372 | if (update_buffer_state || BufferHubDefs::IsClientPosted( |
| 373 | buffer_state_->load(std::memory_order_acquire), |
| 374 | consumer_state_mask)) { |
Tianyu Jiang | 0cdd2a0 | 2018-11-15 10:20:45 -0800 | [diff] [blame] | 375 | consumer->OnProducerPosted(); |
| 376 | } |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 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"); |
Jiwen 'Steve' Cai | 617ba80 | 2018-12-20 14:22:55 -0800 | [diff] [blame] | 394 | ALOGD("ProducerChannel::OnProducerPost: buffer_id=%d, state=0x%x", |
| 395 | buffer_id(), buffer_state_->load(std::memory_order_acquire)); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 396 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 397 | epoll_event event; |
| 398 | event.events = 0; |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 399 | event.data.u32 = 0U; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 400 | int ret = epoll_ctl(release_fence_fd_.Get(), EPOLL_CTL_MOD, |
| 401 | dummy_fence_fd_.Get(), &event); |
| 402 | ALOGE_IF(ret < 0, |
Tianyu | 0c6b7ff | 2018-10-03 11:30:04 -0700 | [diff] [blame] | 403 | "ProducerChannel::OnProducerPost: Failed to modify the shared " |
| 404 | "release fence to include the dummy fence: %s", |
| 405 | strerror(errno)); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 406 | |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 407 | eventfd_t dummy_fence_count = 0U; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 408 | if (eventfd_read(dummy_fence_fd_.Get(), &dummy_fence_count) < 0) { |
| 409 | const int error = errno; |
| 410 | if (error != EAGAIN) { |
| 411 | ALOGE( |
| 412 | "ProducerChannel::ProducerChannel: Failed to read dummy fence, " |
| 413 | "error: %s", |
| 414 | strerror(error)); |
| 415 | return ErrorStatus(error); |
| 416 | } |
Corey Tabaka | 8a4e6a9 | 2017-04-20 13:42:02 -0700 | [diff] [blame] | 417 | } |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 418 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 419 | ALOGW_IF(dummy_fence_count > 0, |
| 420 | "ProducerChannel::ProducerChannel: %" PRIu64 |
| 421 | " dummy fence(s) was signaled during last release/gain cycle " |
| 422 | "buffer_id=%d.", |
| 423 | dummy_fence_count, buffer_id()); |
| 424 | |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 425 | post_fence_ = std::move(acquire_fence); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 426 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 427 | // Signal any interested consumers. If there are none, the buffer will stay |
| 428 | // in posted state until a consumer comes online. This behavior guarantees |
| 429 | // that no frame is silently dropped. |
Tianyu Jiang | ae9668c | 2018-12-07 15:14:47 -0800 | [diff] [blame] | 430 | for (auto& consumer : consumer_channels_) { |
Tianyu Jiang | 0cdd2a0 | 2018-11-15 10:20:45 -0800 | [diff] [blame] | 431 | consumer->OnProducerPosted(); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 432 | } |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 433 | |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 434 | return {}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 435 | } |
| 436 | |
Corey Tabaka | d53870c | 2017-07-06 18:04:27 -0700 | [diff] [blame] | 437 | Status<LocalFence> ProducerChannel::OnProducerGain(Message& /*message*/) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 438 | ATRACE_NAME("ProducerChannel::OnGain"); |
Jiwen 'Steve' Cai | 617ba80 | 2018-12-20 14:22:55 -0800 | [diff] [blame] | 439 | ALOGW("ProducerChannel::OnGain: buffer_id=%d", buffer_id()); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 440 | |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 441 | ClearAvailable(); |
Alex Vakulenko | 052f3ae | 2017-03-31 09:10:43 -0700 | [diff] [blame] | 442 | post_fence_.close(); |
Tianyu Jiang | ae9668c | 2018-12-07 15:14:47 -0800 | [diff] [blame] | 443 | for (auto& consumer : consumer_channels_) { |
| 444 | consumer->OnProducerGained(); |
| 445 | } |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 446 | return {std::move(returned_fence_)}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 447 | } |
| 448 | |
Fan Xu | b0eec51 | 2018-10-30 11:33:15 -0700 | [diff] [blame] | 449 | // TODO(b/112338294) Keep here for reference. Remove it after new logic is |
| 450 | // written. |
| 451 | /* Status<RemoteChannelHandle> ProducerChannel::OnProducerDetach( |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 452 | Message& message) { |
| 453 | ATRACE_NAME("ProducerChannel::OnProducerDetach"); |
| 454 | ALOGD_IF(TRACE, "ProducerChannel::OnProducerDetach: buffer_id=%d", |
| 455 | buffer_id()); |
| 456 | |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 457 | uint32_t buffer_state = buffer_state_->load(std::memory_order_acquire); |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 458 | if (!BufferHubDefs::IsClientGained( |
| 459 | buffer_state, BufferHubDefs::kFirstClientStateMask)) { |
Jiwen 'Steve' Cai | 1c73024 | 2018-12-31 18:40:02 -0800 | [diff] [blame] | 460 | // Can only detach a ProducerBuffer when it's in gained state. |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 461 | ALOGW( |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 462 | "ProducerChannel::OnProducerDetach: The buffer (id=%d, state=%" |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 463 | PRIx32 |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 464 | ") is not in gained state.", |
| 465 | buffer_id(), buffer_state); |
| 466 | return {}; |
| 467 | } |
| 468 | |
| 469 | int channel_id; |
| 470 | auto status = message.PushChannel(0, nullptr, &channel_id); |
| 471 | if (!status) { |
| 472 | ALOGE( |
| 473 | "ProducerChannel::OnProducerDetach: Failed to push detached buffer " |
| 474 | "channel: %s", |
| 475 | status.GetErrorMessage().c_str()); |
| 476 | return ErrorStatus(ENOMEM); |
| 477 | } |
| 478 | |
| 479 | // Make sure we unlock the buffer. |
| 480 | if (int ret = metadata_buffer_.Unlock()) { |
| 481 | ALOGE("ProducerChannel::OnProducerDetach: Failed to unlock metadata."); |
| 482 | return ErrorStatus(-ret); |
| 483 | }; |
| 484 | |
Jiwen 'Steve' Cai | 9004b8c | 2018-10-03 18:52:23 -0700 | [diff] [blame] | 485 | std::unique_ptr<BufferChannel> channel = |
| 486 | BufferChannel::Create(service(), buffer_id(), channel_id, |
| 487 | std::move(buffer_), user_metadata_size_); |
Jiwen 'Steve' Cai | a8049a2 | 2018-03-28 15:14:02 -0700 | [diff] [blame] | 488 | if (!channel) { |
| 489 | ALOGE("ProducerChannel::OnProducerDetach: Invalid buffer."); |
| 490 | return ErrorStatus(EINVAL); |
| 491 | } |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 492 | |
Jiwen 'Steve' Cai | a8049a2 | 2018-03-28 15:14:02 -0700 | [diff] [blame] | 493 | const auto channel_status = |
| 494 | service()->SetChannel(channel_id, std::move(channel)); |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 495 | if (!channel_status) { |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 496 | // Technically, this should never fail, as we just pushed the channel. |
| 497 | // 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] | 498 | LOG_FATAL( |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 499 | "ProducerChannel::OnProducerDetach: Failed to set new detached " |
| 500 | "buffer channel: %s.", channel_status.GetErrorMessage().c_str()); |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 501 | } |
| 502 | |
| 503 | return status; |
Fan Xu | b0eec51 | 2018-10-30 11:33:15 -0700 | [diff] [blame] | 504 | } */ |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 505 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 506 | Status<LocalFence> ProducerChannel::OnConsumerAcquire(Message& /*message*/) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 507 | ATRACE_NAME("ProducerChannel::OnConsumerAcquire"); |
| 508 | ALOGD_IF(TRACE, "ProducerChannel::OnConsumerAcquire: buffer_id=%d", |
| 509 | buffer_id()); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 510 | |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 511 | // Return a borrowed fd to avoid unnecessary duplication of the underlying |
| 512 | // fd. Serialization just needs to read the handle. |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 513 | return {std::move(post_fence_)}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 514 | } |
| 515 | |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 516 | Status<void> ProducerChannel::OnConsumerRelease(Message&, |
| 517 | LocalFence release_fence) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 518 | ATRACE_NAME("ProducerChannel::OnConsumerRelease"); |
| 519 | ALOGD_IF(TRACE, "ProducerChannel::OnConsumerRelease: buffer_id=%d", |
| 520 | buffer_id()); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 521 | |
| 522 | // Attempt to merge the fences if necessary. |
| 523 | if (release_fence) { |
| 524 | if (returned_fence_) { |
Corey Tabaka | 3079cb7 | 2017-01-19 15:07:26 -0800 | [diff] [blame] | 525 | LocalFence merged_fence(sync_merge("bufferhub_merged", |
| 526 | returned_fence_.get_fd(), |
| 527 | release_fence.get_fd())); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 528 | const int error = errno; |
| 529 | if (!merged_fence) { |
| 530 | ALOGE("ProducerChannel::OnConsumerRelease: Failed to merge fences: %s", |
| 531 | strerror(error)); |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 532 | return ErrorStatus(error); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 533 | } |
| 534 | returned_fence_ = std::move(merged_fence); |
| 535 | } else { |
| 536 | returned_fence_ = std::move(release_fence); |
| 537 | } |
| 538 | } |
| 539 | |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 540 | uint32_t current_buffer_state = |
Tianyu Jiang | 0cdd2a0 | 2018-11-15 10:20:45 -0800 | [diff] [blame] | 541 | buffer_state_->load(std::memory_order_acquire); |
Tianyu Jiang | e60a4ad | 2019-01-04 14:37:23 -0800 | [diff] [blame^] | 542 | uint32_t current_active_clients_bit_mask = |
| 543 | active_clients_bit_mask_->load(std::memory_order_acquire); |
| 544 | // Signal producer if all current active consumers have released the buffer. |
Tianyu Jiang | ae9668c | 2018-12-07 15:14:47 -0800 | [diff] [blame] | 545 | if (BufferHubDefs::IsBufferReleased(current_buffer_state & |
Tianyu Jiang | e60a4ad | 2019-01-04 14:37:23 -0800 | [diff] [blame^] | 546 | ~orphaned_consumer_bit_mask_ & |
| 547 | current_active_clients_bit_mask)) { |
| 548 | buffer_state_->store(0U); |
Tianyu Jiang | 0cdd2a0 | 2018-11-15 10:20:45 -0800 | [diff] [blame] | 549 | SignalAvailable(); |
| 550 | if (orphaned_consumer_bit_mask_) { |
| 551 | ALOGW( |
| 552 | "%s: orphaned buffer detected during the this acquire/release cycle: " |
Jiwen 'Steve' Cai | 617ba80 | 2018-12-20 14:22:55 -0800 | [diff] [blame] | 553 | "id=%d orphaned=0x%" PRIx32 " queue_index=%" PRId64 ".", |
Tianyu Jiang | 0cdd2a0 | 2018-11-15 10:20:45 -0800 | [diff] [blame] | 554 | __FUNCTION__, buffer_id(), orphaned_consumer_bit_mask_, |
| 555 | metadata_header_->queue_index); |
| 556 | orphaned_consumer_bit_mask_ = 0; |
| 557 | } |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 558 | } |
| 559 | |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 560 | return {}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 561 | } |
| 562 | |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 563 | void ProducerChannel::OnConsumerOrphaned(const uint32_t& consumer_state_mask) { |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 564 | // Remember the ignored consumer so that newly added consumer won't be |
| 565 | // taking the same state mask as this orphaned consumer. |
| 566 | ALOGE_IF(orphaned_consumer_bit_mask_ & consumer_state_mask, |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 567 | "%s: Consumer (consumer_state_mask=%" PRIx32 |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 568 | ") is already orphaned.", |
| 569 | __FUNCTION__, consumer_state_mask); |
| 570 | orphaned_consumer_bit_mask_ |= consumer_state_mask; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 571 | |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 572 | uint32_t current_buffer_state = |
Tianyu Jiang | 0cdd2a0 | 2018-11-15 10:20:45 -0800 | [diff] [blame] | 573 | buffer_state_->load(std::memory_order_acquire); |
Tianyu Jiang | e60a4ad | 2019-01-04 14:37:23 -0800 | [diff] [blame^] | 574 | uint32_t current_active_clients_bit_mask = |
| 575 | active_clients_bit_mask_->load(std::memory_order_acquire); |
| 576 | // Signal producer if all current active consumers have released the buffer. |
Tianyu Jiang | ae9668c | 2018-12-07 15:14:47 -0800 | [diff] [blame] | 577 | if (BufferHubDefs::IsBufferReleased(current_buffer_state & |
Tianyu Jiang | e60a4ad | 2019-01-04 14:37:23 -0800 | [diff] [blame^] | 578 | ~orphaned_consumer_bit_mask_ & |
| 579 | current_active_clients_bit_mask)) { |
| 580 | buffer_state_->store(0U); |
Tianyu Jiang | 0cdd2a0 | 2018-11-15 10:20:45 -0800 | [diff] [blame] | 581 | SignalAvailable(); |
| 582 | } |
| 583 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 584 | // Atomically clear the fence state bit as an orphaned consumer will never |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 585 | // signal a release fence. |
| 586 | fence_state_->fetch_and(~consumer_state_mask, std::memory_order_release); |
| 587 | |
| 588 | // Atomically set the buffer state of this consumer to released state. |
| 589 | buffer_state_->fetch_and(~consumer_state_mask, std::memory_order_release); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 590 | |
| 591 | ALOGW( |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 592 | "%s: detected new orphaned consumer buffer_id=%d " |
Jiwen 'Steve' Cai | 617ba80 | 2018-12-20 14:22:55 -0800 | [diff] [blame] | 593 | "consumer_state_mask=%" PRIx32 " queue_index=%" PRId64 |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 594 | " buffer_state=%" PRIx32 " fence_state=%" PRIx32 ".", |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 595 | __FUNCTION__, buffer_id(), consumer_state_mask, |
| 596 | metadata_header_->queue_index, |
Tianyu Jiang | e2cdec9 | 2018-10-30 17:40:58 -0700 | [diff] [blame] | 597 | buffer_state_->load(std::memory_order_acquire), |
| 598 | fence_state_->load(std::memory_order_acquire)); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 599 | } |
| 600 | |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 601 | void ProducerChannel::AddConsumer(ConsumerChannel* channel) { |
| 602 | consumer_channels_.push_back(channel); |
| 603 | } |
| 604 | |
| 605 | void ProducerChannel::RemoveConsumer(ConsumerChannel* channel) { |
| 606 | consumer_channels_.erase( |
| 607 | std::find(consumer_channels_.begin(), consumer_channels_.end(), channel)); |
Tianyu | 6705349 | 2018-10-04 14:00:22 -0700 | [diff] [blame] | 608 | // Restore the consumer state bit and make it visible in other threads that |
| 609 | // acquire the active_clients_bit_mask_. |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 610 | uint32_t consumer_state_mask = channel->client_state_mask(); |
| 611 | uint32_t current_active_clients_bit_mask = |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 612 | active_clients_bit_mask_->load(std::memory_order_acquire); |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 613 | uint32_t updated_active_clients_bit_mask = |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 614 | current_active_clients_bit_mask & (~consumer_state_mask); |
| 615 | while (!active_clients_bit_mask_->compare_exchange_weak( |
| 616 | current_active_clients_bit_mask, updated_active_clients_bit_mask, |
| 617 | std::memory_order_acq_rel, std::memory_order_acquire)) { |
| 618 | ALOGI( |
| 619 | "%s: Failed to remove consumer state mask. Current active clients bit " |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 620 | "mask is changed to %" PRIx32 |
| 621 | " when trying to acquire and modify it to %" PRIx32 |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 622 | ". About to try again.", |
| 623 | __FUNCTION__, current_active_clients_bit_mask, |
| 624 | updated_active_clients_bit_mask); |
| 625 | updated_active_clients_bit_mask = |
| 626 | current_active_clients_bit_mask & (~consumer_state_mask); |
| 627 | } |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 628 | |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 629 | const uint32_t current_buffer_state = |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 630 | buffer_state_->load(std::memory_order_acquire); |
| 631 | if (BufferHubDefs::IsClientPosted(current_buffer_state, |
| 632 | consumer_state_mask) || |
| 633 | BufferHubDefs::IsClientAcquired(current_buffer_state, |
| 634 | consumer_state_mask)) { |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 635 | // The consumer client is being destoryed without releasing. This could |
| 636 | // happen in corner cases when the consumer crashes. Here we mark it |
| 637 | // orphaned before remove it from producer. |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 638 | OnConsumerOrphaned(consumer_state_mask); |
| 639 | return; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 640 | } |
| 641 | |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 642 | if (BufferHubDefs::IsClientReleased(current_buffer_state, |
| 643 | consumer_state_mask) || |
| 644 | BufferHubDefs::AnyClientGained(current_buffer_state)) { |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 645 | // The consumer is being close while it is suppose to signal a release |
| 646 | // fence. Signal the dummy fence here. |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 647 | if (fence_state_->load(std::memory_order_acquire) & consumer_state_mask) { |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 648 | epoll_event event; |
| 649 | event.events = EPOLLIN; |
Tianyu Jiang | a99f911 | 2018-12-13 18:23:07 -0800 | [diff] [blame] | 650 | event.data.u32 = consumer_state_mask; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 651 | if (epoll_ctl(release_fence_fd_.Get(), EPOLL_CTL_MOD, |
| 652 | dummy_fence_fd_.Get(), &event) < 0) { |
| 653 | ALOGE( |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 654 | "%s: Failed to modify the shared release fence to include the " |
| 655 | "dummy fence: %s", |
| 656 | __FUNCTION__, strerror(errno)); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 657 | return; |
| 658 | } |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 659 | ALOGW("%s: signal dummy release fence buffer_id=%d", __FUNCTION__, |
| 660 | buffer_id()); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 661 | eventfd_write(dummy_fence_fd_.Get(), 1); |
| 662 | } |
| 663 | } |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 664 | } |
| 665 | |
Tianyu | f669f6a | 2018-10-10 15:34:32 -0700 | [diff] [blame] | 666 | // Returns true if the given parameters match the underlying buffer |
| 667 | // parameters. |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 668 | bool ProducerChannel::CheckParameters(uint32_t width, uint32_t height, |
Hendrik Wagenaar | 108e84f | 2017-05-07 22:19:17 -0700 | [diff] [blame] | 669 | uint32_t layer_count, uint32_t format, |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 670 | uint64_t usage, |
| 671 | size_t user_metadata_size) { |
| 672 | return user_metadata_size == user_metadata_size_ && |
| 673 | buffer_.width() == width && buffer_.height() == height && |
| 674 | buffer_.layer_count() == layer_count && buffer_.format() == format && |
| 675 | buffer_.usage() == usage; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 676 | } |
| 677 | |
| 678 | } // namespace dvr |
| 679 | } // namespace android |