Write the Driver Transmit Task 3. We use Netboot tool to load our development from a server to the target via an ethernet network. In this chapter will see the initialization phase, how the controller uses the host memory and the 2 threads launched at the initialization time. Learn about the network device 3. By reading or writing these registers, a driver can obtain information about the type of the board, the interrupt it uses, the mapping of the chip specific registers, … On Intel target, the chip specific registers can be accessed via 2 methods: Network Driver Makefile 3.
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Increasing the size of the heap 4. Write the Driver Interrupt Handler 3. We have used this dfc mechanism, with 4Kb page. This board includes an Ethernet controller based on a DEC chip. We have chosen to use 7 receive buffers and 1 transmit buffer to optimize memory allocation due to cache and paging problem that will be explained in the section Encountered Problems.
Digital Dec 10 100 Fast Ethernet PCI Network Cards 21143 PC 21140 AE PD
Then the driver waits for incoming frame to give to the protocol stack or outcoming frame to send on the physical link. First draft of this document Planned releases: Once this operation performed, the driver is able to extract the information it needs to configure the board internal registers, like the interrupt line, the base address,… The board internal registers will not be detailled here. But concerning the port of the DEC driver into Netboot, 2140 are faced with a problem: Understand the network scheduling conventions 3.
To achieve it, we have chosen a Motorola MCP board. Netboot DEC driver 7. Write the Driver Transmit Task 3. Accton EN All three media types supported.
Software and Drivers for the Intel® PRO/ Adapter
Including the required managers 4. Write the Driver Attach Function 3. Because the DEC chip uses the host memory to store the incoming frame and because the DEC configuration registers are mapped into the PCI address space, we must ensure that the data read or written by the host processor are the ones written or read by the DEC device in the host memory and not old data stored in the cache memory. The difference between a receive and a transmit buffer descriptor is located in the status and control bits fields.
Network device configuration 4. Each time an Ethernet frame is put in the transmit queue, an event is sent to the transmit thread, which empty the queue by sending each outcoming frame.
Because we use only one transmit buffer, we are sure that the frame is well-sent before sending the next. Network Task Structure and Data Flow 3.
On Intel, the memory region cache management is available only if the paging unit is enabled.
Testing the Driver 5. Then the driver connects an interrupt handler to the interrupt line driven by the Ethernet controller the only interrupt which will be treated is the receive interrupt and launches 2 threads: Once the attach function executed, the driver initializes the DEC chip. This DEC chip uses the host memory to store the incoming Ethernet frames and the descriptor of these frames. Application Programming Interface 4. We have used it to configure the board.
Software and Drivers for the Intel® PRO/100 Adapter
This thread is event driven. We have 7 receive buffers and 1 transmit buffer, and for each, 1 descriptor: Adding a Default Route 4.
Network Driver Makefile 3. Write the Driver Receive Task 3. It means that we will have to re-write some mechanisms of this driver. By reading or writing these registers, a driver can obtain information about the type of the board, the interrupt it uses, the mapping of the chip specific registers, … On Intel target, the chip specific registers can be accessed via 2 methods: