Hi, I'm working on some diagrams in an attempt to help me understand how the ide device driver works. Below is a general outline that shows how I plan to organize this diagram. I would be grateful for any advice or comments.
Level 1 1) driver initialization 2) error handling 3) read operation 4) write operation 5) shutdown 6) memory management 7) event handling Level 2 "Expanding initialization" 1) allocate memory and establish data structures 2) establish state information and populate data elements 3) determine base port i/o address 4) irq setup 5) dma setup 6) register with VFS: establish device major number and register file_operations struct. 7) initialize event handling Level 3 "Error handling" 1) resource availability 2) device errors that involve: reading, writing, timing 3) runtime resourse errors 4) explicit error codes 5) overrun and under timing Level 4 "Read" 1) recieve event 2) transfer argument to working space 3) allocate buffers "I think the buffer allocation is done by the buffer cache" 4) device control 5) suspend/wait processing 6) wakeup/housekeeping 7) receive data 8) kernel passes data to associated process Level 5 "Disk driver initiates read throught disk drive controller" 1) check status 2) setup dma channel 3) associate device with buffer channel 4) load device control register: dma channel, cmd, logical link 5) sync action I'm hoping that someone will be able to look at this and provide me with some feedback. I' trying to work on a school project that involves adaptive block rearrangment. The problem is that I've never had any experience with systems programming. I think the construction of such a diagram "except this one needs to be correct" would be extremely helpful. As I go through ide.c, I can associate each routine with one of the above specified categories. Thanks, Scott Gray :) -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word "unsubscribe" to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] .
