Compaq TRU64 AA-RNG2A-TE - Manual (Page 8)

12.15 Resetting the Device (SIOCIFRESET ioctl Command) .. . .. . .. . 12–11
12.16 Setting Device Characteristics (SIOCIFSETCHAR ioctl
Command) .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. .
12–11
12.17 Releasing the Simple Lock and Resetting the IPL . . . .. . .. . .. . .. . 12–13
13 Implementing the Interrupt Section
13.1 Implementing the el_intr Routine . . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. . 13–1
13.1.1 Setting the IPL and Obtaining the Simple Lock .. . .. . .. . .. . 13–2
13.1.2 Rearming the Next Timeout . .. . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. . 13–2
13.1.3 Reading the Interrupt Status . . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. . 13–3
13.1.4 Processing Completed Receive and Transmit Operations . 13–3
13.1.5 Acknowledging the Interrupt . . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. . 13–4
13.1.6 Transmitting Pending Frames . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. . 13–4
13.1.7 Releasing the Simple Lock and Resetting the IPL . .. . .. . .. . 13–4
13.1.8 Indicating That the Interrupt Was Serviced . .. . . .. . .. . .. . .. . 13–5
13.2 Implementing the el_rint Routine . . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. . 13–5
13.2.1 Counting the Receive Interrupt and Reading the Receive
Status . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. .
13–5
13.2.2 Pulling the Packets from the FIFO Buffer .. . .. . . .. . .. . .. . .. . 13–6
13.2.3 Examining the First Part of the Packet .. . .. . .. . . .. . .. . .. . .. . 13–7
13.2.4 Copying the Received Packet into the mbuf . .. . . .. . .. . .. . .. . 13–8
13.2.5 Discarding a Packet .. . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. . 13–9
13.3 Implementing the el_tint Routine . . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. . 13–10
13.3.1 Counting the Transmit Interrupt . .. . . .. . .. . .. . .. . . .. . .. . .. . .. . 13–10
13.3.2 Reading the Transmit Status and Counting All Significant
Events . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. .
13–10
13.3.3 Managing Excessive Data Collisions . .. . .. . .. . .. . . .. . .. . .. . .. . 13–11
13.3.4 Writing to the Status Register to Obtain the Next Value . . 13–11
13.3.5 Queuing Other Transmits .. . .. . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. . 13–12
13.4 Implementing the el_error Routine .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. . 13–12
14 Network Device Driver Configuration
Index
Figures
1–1 Sections of a Network Device Driver . . .. . . .. . .. . .. . .. . . .. . .. . .. . .. . 1–2
2–1 Window 0 Configuration Registers . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. . 2–5
2–2 Window 3 Configuration Registers . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. . 2–8
2–3 Window 1 Operational Registers .. . .. . .. . . .. . .. . .. . .. . . .. . .. . .. . .. . 2–9
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