Adaptec 1737100 Programmer Manual - Page 173

RxDescQueue1CtrlValue.RxQ1BufferLength = AIC6915_SIZE_OF_RX_BUFFERS

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Page 173 highlights

Sample Driver // assign the base address of the completion queue (high 24 bits) RxCompletionQueue1CtrlValue.RxCompletionQ1BaseAddress = NdisGetPhysicalAddressLow(RxCompletionQ) >> 8; // Write the value to the AIC-6915 AIC6915_WRITE_REG(Adapter->RegisterBaseVa->RxCompletionQueue1Ctrl, RxCompletionQueue1CtrlValue); // Single completion queue - use default value for RxCompletionQueue2Ctrl // Initialize Tx and Rx Completion Queue consumer and producer indices to zero AIC6915_WRITE_REG(Adapter->RegisterBaseVa->CompletionQueue1ConsumerIndex, 0); AIC6915_WRITE_REG(Adapter->RegisterBaseVa->CompletionQueue1ProducerIndex, 0); // Use default value for RxCompletionQ2Ptrs // Use default value for RxDmaCtrl // Initialize RxDescQueue1Ctrl // set the threshold based on a registry entry // NOTE: The following threshold need not be set for polling model. // It's important only in producer-consumer model. RxDescQueue1CtrlValue.RxQ1MinDescThreshold = Adapter->RxQ1MinDescThreshold; // do not allow software to write consumer index RxDescQueue1CtrlValue.RxQ1ConsumerWe = 0; // no spacing between descriptors RxDescQueue1CtrlValue.RxDescSpacing = 0; // use 32-bit addressing RxDescQueue1CtrlValue.Rx64bitDescQAddr = 0; // use a 4 byte descriptor RxDescQueue1CtrlValue.Rx64bitBufferAddress = 0; // use a variable size queue RxDescQueue1CtrlValue.RxVariableSizeQueues = 1; // use 2K receive buffer descriptors. This entry must be selected even if // variable size queues are used. In this case, this size is the maximum size // of the variable-size queue. RxDescQueue1CtrlValue.RxDescQ1Entries = 1; // use polling model RxDescQueue1CtrlValue.RxPrefetchDescriptors = 1; // set the size of each receive buffer RxDescQueue1CtrlValue.RxQ1BufferLength = AIC6915_SIZE_OF_RX_BUFFERS; // Write the value to AIC-6915 AIC6915_WRITE_REG(Adapter->RegisterBaseVa->RxDescQueue1Ctrl, RxDescQueue1CtrlValue.reg); // Single buffer queue - use default value for RxDescQueue2Ctrl // Set up the Receive Buffer Descriptor Queue 8-13

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8-13
Sample Driver
// assign the base address of the completion queue (high 24 bits)
RxCompletionQueue1CtrlValue.RxCompletionQ1BaseAddress =
NdisGetPhysicalAddressLow(RxCompletionQ) >> 8;
// Write the value to the AIC-6915
AIC6915_WRITE_REG(Adapter->RegisterBaseVa->RxCompletionQueue1Ctrl,
RxCompletionQueue1CtrlValue);
// Single completion queue - use default value for RxCompletionQueue2Ctrl
// Initialize Tx and Rx Completion Queue consumer and producer indices to zero
AIC6915_WRITE_REG(Adapter->RegisterBaseVa->CompletionQueue1ConsumerIndex,
0);
AIC6915_WRITE_REG(Adapter->RegisterBaseVa->CompletionQueue1ProducerIndex, 0);
// Use default value for RxCompletionQ2Ptrs
// Use default value for RxDmaCtrl
// Initialize RxDescQueue1Ctrl
// set the threshold based on a registry entry
// NOTE: The following threshold need not be set for polling model.
// It's important only in producer-consumer model.
RxDescQueue1CtrlValue.RxQ1MinDescThreshold = Adapter->RxQ1MinDescThreshold;
// do not allow software to write consumer index
RxDescQueue1CtrlValue.RxQ1ConsumerWe = 0;
// no spacing between descriptors
RxDescQueue1CtrlValue.RxDescSpacing = 0;
// use 32-bit addressing
RxDescQueue1CtrlValue.Rx64bitDescQAddr = 0;
// use a 4 byte descriptor
RxDescQueue1CtrlValue.Rx64bitBufferAddress = 0;
// use a variable size queue
RxDescQueue1CtrlValue.RxVariableSizeQueues = 1;
// use 2K receive buffer descriptors.
This entry must be selected even if
// variable size queues are used.
In this case, this size is the maximum size
// of the variable-size queue.
RxDescQueue1CtrlValue.RxDescQ1Entries = 1;
// use polling model
RxDescQueue1CtrlValue.RxPrefetchDescriptors = 1;
// set the size of each receive buffer
RxDescQueue1CtrlValue.RxQ1BufferLength = AIC6915_SIZE_OF_RX_BUFFERS;
// Write the value to AIC-6915
AIC6915_WRITE_REG(Adapter->RegisterBaseVa->RxDescQueue1Ctrl,
RxDescQueue1CtrlValue.reg);
// Single buffer queue - use default value for RxDescQueue2Ctrl
// Set up the Receive Buffer Descriptor Queue