From: Derek Hower Date: Sat, 18 Jul 2009 22:03:51 +0000 (-0500) Subject: ruby: fixed dma sequencer bug X-Git-Tag: Calvin_Submission~216 X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=4b7ea4cb510465bc82c6679407d5a125cfddd18c;p=gem5.git ruby: fixed dma sequencer bug The DMASequencer was still using a parameter from the old RubyConfig, causing an offset error when the requested data wasn't block aligned. This changeset also includes a fix to MI_example for a similar bug. --- diff --git a/src/mem/protocol/MI_example-dir.sm b/src/mem/protocol/MI_example-dir.sm index a275e4b8d..fa8903d47 100644 --- a/src/mem/protocol/MI_example-dir.sm +++ b/src/mem/protocol/MI_example-dir.sm @@ -129,9 +129,9 @@ machine(Directory, "Directory protocol") : LATENCY_TO_MEM_CTRL_LATENCY LATENCY_D if (dmaRequestQueue_in.isReady()) { peek(dmaRequestQueue_in, DMARequestMsg) { if (in_msg.Type == DMARequestType:READ) { - trigger(Event:DMA_READ, in_msg.PhysicalAddress); + trigger(Event:DMA_READ, in_msg.LineAddress); } else if (in_msg.Type == DMARequestType:WRITE) { - trigger(Event:DMA_WRITE, in_msg.PhysicalAddress); + trigger(Event:DMA_WRITE, in_msg.LineAddress); } else { error("Invalid message"); } @@ -267,6 +267,7 @@ machine(Directory, "Directory protocol") : LATENCY_TO_MEM_CTRL_LATENCY LATENCY_D peek(memQueue_in, MemoryMsg) { enqueue(dmaResponseNetwork_out, DMAResponseMsg, latency="MEMORY_LATENCY") { out_msg.PhysicalAddress := address; + out_msg.LineAddress := address; out_msg.Type := DMAResponseType:DATA; out_msg.DataBlk := in_msg.DataBlk; // we send the entire data block and rely on the dma controller to split it up if need be out_msg.Destination.add(map_Address_to_DMA(address)); @@ -281,6 +282,7 @@ machine(Directory, "Directory protocol") : LATENCY_TO_MEM_CTRL_LATENCY LATENCY_D peek(requestQueue_in, RequestMsg) { enqueue(dmaResponseNetwork_out, DMAResponseMsg, latency="MEMORY_LATENCY") { out_msg.PhysicalAddress := address; + out_msg.LineAddress := address; out_msg.Type := DMAResponseType:DATA; out_msg.DataBlk := in_msg.DataBlk; // we send the entire data block and rely on the dma controller to split it up if need be out_msg.Destination.add(map_Address_to_DMA(address)); @@ -292,6 +294,7 @@ machine(Directory, "Directory protocol") : LATENCY_TO_MEM_CTRL_LATENCY LATENCY_D action(da_sendDMAAck, "da", desc="Send Ack to DMA controller") { enqueue(dmaResponseNetwork_out, DMAResponseMsg, latency="MEMORY_LATENCY") { out_msg.PhysicalAddress := address; + out_msg.LineAddress := address; out_msg.Type := DMAResponseType:ACK; out_msg.Destination.add(map_Address_to_DMA(address)); out_msg.MessageSize := MessageSizeType:Writeback_Control; @@ -355,12 +358,6 @@ machine(Directory, "Directory protocol") : LATENCY_TO_MEM_CTRL_LATENCY LATENCY_D } } - action(dw_writeDMAData, "dw", desc="DMA Write data to memory") { - peek(dmaRequestQueue_in, DMARequestMsg) { - directory[in_msg.PhysicalAddress].DataBlk.copyPartial(in_msg.DataBlk, in_msg.Offset, in_msg.Len); - } - } - action(dwt_writeDMADataFromTBE, "dwt", desc="DMA Write data to memory from TBE") { directory[address].DataBlk.copyPartial(TBEs[address].DataBlk, TBEs[address].Offset, TBEs[address].Len); } diff --git a/src/mem/protocol/MI_example-dma.sm b/src/mem/protocol/MI_example-dma.sm index 1f929cf9b..d5de18552 100644 --- a/src/mem/protocol/MI_example-dma.sm +++ b/src/mem/protocol/MI_example-dma.sm @@ -39,9 +39,9 @@ machine(DMA, "DMA Controller") { if (dmaRequestQueue_in.isReady()) { peek(dmaRequestQueue_in, DMARequestMsg) { if (in_msg.Type == DMARequestType:READ ) { - trigger(Event:ReadRequest, in_msg.PhysicalAddress); + trigger(Event:ReadRequest, in_msg.LineAddress); } else if (in_msg.Type == DMARequestType:WRITE) { - trigger(Event:WriteRequest, in_msg.PhysicalAddress); + trigger(Event:WriteRequest, in_msg.LineAddress); } else { error("Invalid request type"); } @@ -53,9 +53,9 @@ machine(DMA, "DMA Controller") { if (dmaResponseQueue_in.isReady()) { peek( dmaResponseQueue_in, DMAResponseMsg) { if (in_msg.Type == DMAResponseType:ACK) { - trigger(Event:Ack, in_msg.PhysicalAddress); + trigger(Event:Ack, in_msg.LineAddress); } else if (in_msg.Type == DMAResponseType:DATA) { - trigger(Event:Data, in_msg.PhysicalAddress); + trigger(Event:Data, in_msg.LineAddress); } else { error("Invalid response type"); } @@ -67,6 +67,7 @@ machine(DMA, "DMA Controller") { peek(dmaRequestQueue_in, DMARequestMsg) { enqueue(reqToDirectory_out, DMARequestMsg) { out_msg.PhysicalAddress := address; + out_msg.LineAddress := in_msg.LineAddress; out_msg.Type := DMARequestType:READ; out_msg.DataBlk := in_msg.DataBlk; out_msg.Len := in_msg.Len; @@ -80,6 +81,7 @@ machine(DMA, "DMA Controller") { peek(dmaRequestQueue_in, DMARequestMsg) { enqueue(reqToDirectory_out, DMARequestMsg) { out_msg.PhysicalAddress := address; + out_msg.LineAddress := in_msg.LineAddress; out_msg.Type := DMARequestType:WRITE; out_msg.DataBlk := in_msg.DataBlk; out_msg.Len := in_msg.Len; diff --git a/src/mem/protocol/MI_example-msg.sm b/src/mem/protocol/MI_example-msg.sm index 56c2e2e01..8c0afed2e 100644 --- a/src/mem/protocol/MI_example-msg.sm +++ b/src/mem/protocol/MI_example-msg.sm @@ -104,6 +104,7 @@ enumeration(DMAResponseType, desc="...", default="DMAResponseType_NULL") { structure(DMARequestMsg, desc="...", interface="NetworkMessage") { DMARequestType Type, desc="Request type (read/write)"; Address PhysicalAddress, desc="Physical address for this request"; + Address LineAddress, desc="Line address for this request"; NetDest Destination, desc="Destination"; DataBlock DataBlk, desc="DataBlk attached to this request"; int Offset, desc="The offset into the datablock"; @@ -114,6 +115,7 @@ structure(DMARequestMsg, desc="...", interface="NetworkMessage") { structure(DMAResponseMsg, desc="...", interface="NetworkMessage") { DMAResponseType Type, desc="Response type (DATA/ACK)"; Address PhysicalAddress, desc="Physical address for this request"; + Address LineAddress, desc="Line address for this request"; NetDest Destination, desc="Destination"; DataBlock DataBlk, desc="DataBlk attached to this request"; MessageSizeType MessageSize, desc="size category of the message"; diff --git a/src/mem/ruby/config/MI_example-homogeneous.rb b/src/mem/ruby/config/MI_example-homogeneous.rb index 7dffb3957..d43e384e5 100644 --- a/src/mem/ruby/config/MI_example-homogeneous.rb +++ b/src/mem/ruby/config/MI_example-homogeneous.rb @@ -10,10 +10,10 @@ require "cfg.rb" # default values -num_cores = 16 +num_cores = 2 L1_CACHE_SIZE_KB = 32 L1_CACHE_ASSOC = 8 -L1_CACHE_LATENCY = 2 +L1_CACHE_LATENCY = 1 num_memories = 2 memory_size_mb = 1024 NUM_DMA = 1 diff --git a/src/mem/ruby/system/DMASequencer.cc b/src/mem/ruby/system/DMASequencer.cc index 4aa092113..5da7ea51e 100644 --- a/src/mem/ruby/system/DMASequencer.cc +++ b/src/mem/ruby/system/DMASequencer.cc @@ -29,6 +29,7 @@ void DMASequencer::init(const vector & argv) m_mandatory_q_ptr = m_controller->getMandatoryQueue(); m_is_busy = false; + m_data_block_mask = ~ (~0 << RubySystem::getBlockSizeBits()); } int64_t DMASequencer::makeRequest(const RubyRequest & request) @@ -50,7 +51,7 @@ int64_t DMASequencer::makeRequest(const RubyRequest & request) assert(0); } - assert(!m_is_busy); + assert(!m_is_busy); // only support one outstanding DMA request m_is_busy = true; active_request.start_paddr = paddr; @@ -63,14 +64,15 @@ int64_t DMASequencer::makeRequest(const RubyRequest & request) DMARequestMsg msg; msg.getPhysicalAddress() = Address(paddr); + msg.getLineAddress() = line_address(msg.getPhysicalAddress()); msg.getType() = write ? DMARequestType_WRITE : DMARequestType_READ; - msg.getOffset() = paddr & RubyConfig::dataBlockMask(); - msg.getLen() = (msg.getOffset() + len) < RubySystem::getBlockSizeBytes() ? - (msg.getOffset() + len) : + msg.getOffset() = paddr & m_data_block_mask; + msg.getLen() = (msg.getOffset() + len) <= RubySystem::getBlockSizeBytes() ? + len : RubySystem::getBlockSizeBytes() - msg.getOffset(); if (write) { msg.getType() = DMARequestType_WRITE; - msg.getDataBlk().setData(data, 0, msg.getLen()); + msg.getDataBlk().setData(data, msg.getOffset(), msg.getLen()); } else { msg.getType() = DMARequestType_READ; } @@ -91,15 +93,20 @@ void DMASequencer::issueNext() } DMARequestMsg msg; - msg.getPhysicalAddress() = Address(active_request.start_paddr + active_request.bytes_completed); - assert((msg.getPhysicalAddress().getAddress() & RubyConfig::dataBlockMask()) == 0); + msg.getPhysicalAddress() = Address(active_request.start_paddr + + active_request.bytes_completed); + assert((msg.getPhysicalAddress().getAddress() & m_data_block_mask) == 0); + msg.getLineAddress() = line_address(msg.getPhysicalAddress()); msg.getOffset() = 0; - msg.getType() = active_request.write ? DMARequestType_WRITE : DMARequestType_READ; - msg.getLen() = active_request.len - active_request.bytes_completed < RubySystem::getBlockSizeBytes() ? - active_request.len - active_request.bytes_completed : - RubySystem::getBlockSizeBytes(); + msg.getType() = (active_request.write ? DMARequestType_WRITE : + DMARequestType_READ); + msg.getLen() = (active_request.len - + active_request.bytes_completed < RubySystem::getBlockSizeBytes() ? + active_request.len - active_request.bytes_completed : + RubySystem::getBlockSizeBytes()); if (active_request.write) { - msg.getDataBlk().setData(&active_request.data[active_request.bytes_completed], 0, msg.getLen()); + msg.getDataBlk().setData(&active_request.data[active_request.bytes_completed], + 0, msg.getLen()); msg.getType() = DMARequestType_WRITE; } else { msg.getType() = DMARequestType_READ; @@ -114,8 +121,10 @@ void DMASequencer::dataCallback(const DataBlock & dblk) int len = active_request.bytes_issued - active_request.bytes_completed; int offset = 0; if (active_request.bytes_completed == 0) - offset = active_request.start_paddr & RubyConfig::dataBlockMask(); - memcpy(&active_request.data[active_request.bytes_completed], dblk.getData(offset, len), len); + offset = active_request.start_paddr & m_data_block_mask; + assert( active_request.write == false ); + memcpy(&active_request.data[active_request.bytes_completed], + dblk.getData(offset, len), len); issueNext(); } diff --git a/src/mem/ruby/system/DMASequencer.hh b/src/mem/ruby/system/DMASequencer.hh index 2665549e3..1f60b95ec 100644 --- a/src/mem/ruby/system/DMASequencer.hh +++ b/src/mem/ruby/system/DMASequencer.hh @@ -41,6 +41,7 @@ private: int m_version; AbstractController* m_controller; bool m_is_busy; + uint64_t m_data_block_mask; DMARequest active_request; int num_active_requests; MessageBuffer* m_mandatory_q_ptr;