Compaq Tru64 UNIX Installation Manual page 8

12.15 Resetting the Device (SIOCIFRESET ioctl Command) .. . .. . .. .
12.16 Setting Device Characteristics (SIOCIFSETCHAR ioctl
Command) .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. .
12.17 Releasing the Simple Lock and Resetting the IPL . . . .. . .. . .. . .. .
13 Implementing the Interrupt Section
13.1 Implementing the el_intr Routine . . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. .
13.1.1 Setting the IPL and Obtaining the Simple Lock .. . .. . .. . .. .
13.1.2 Rearming the Next Timeout . .. . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. .
13.1.3 Reading the Interrupt Status . . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. .
13.1.4 Processing Completed Receive and Transmit Operations .
13.1.5 Acknowledging the Interrupt . . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. .
13.1.6 Transmitting Pending Frames . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. .
13.1.7 Releasing the Simple Lock and Resetting the IPL . .. . .. . .. .
13.1.8 Indicating That the Interrupt Was Serviced . .. . . .. . .. . .. . .. .
13.2 Implementing the el_rint Routine . . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. .
13.2.1 Counting the Receive Interrupt and Reading the Receive
Status . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. .
13.2.2 Pulling the Packets from the FIFO Buffer .. . .. . . .. . .. . .. . .. .
13.2.3 Examining the First Part of the Packet .. . .. . .. . . .. . .. . .. . .. .
13.2.4 Copying the Received Packet into the mbuf . .. . . .. . .. . .. . .. .
13.2.5
Discarding a Packet .. . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. .
13.3
Implementing the el_tint Routine . . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. .
13.3.1 Counting the Transmit Interrupt . .. . . .. . .. . .. . .. . . .. . .. . .. . .. .
13.3.2 Reading the Transmit Status and Counting All Significant
Events . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. .
13.3.3 Managing Excessive Data Collisions . .. . .. . .. . .. . . .. . .. . .. . .. .
13.3.4 Writing to the Status Register to Obtain the Next Value . .
13.3.5 Queuing Other Transmits .. . .. . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. .
13.4
Implementing the el_error Routine .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. .
14 Network Device Driver Configuration
Index
Figures
1-1
Sections of a Network Device Driver . . .. . . .. . .. . .. . .. . . .. . .. . .. . .. .
2-1 Window 0 Configuration Registers . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. .
2-2 Window 3 Configuration Registers . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. .
2-3 Window 1 Operational Registers .. . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. .
viii Contents
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