13buses/pci

   1 %PCI
   2 %Thadeu Cascardo
   3
   4 # PCI Basics
   5
   6 * Addressing: bus, device and function
   7 * Configuration space
   8 * "Firmware" (BIOS, PROM, etc) sets up the devices
   9
  10 # Files and Tools
  11
  12 * /sys/bus/pci/
  13         - devices/*/
  14                 * vendor
  15                 * device
  16                 * class
  17                 * config
  18 * /proc/bus/pci/
  19 * /proc/bus/pci/devices
  20 * lspci
  21
  22 # Configuration space
  23
  24 * 64 standardized bytes
  25 * Identifiers
  26 * Base Addresses
  27 * IRQs
  28 * Little-endian
  29
  30 # PCI IDs
  31
  32 * struct pci\\_device\\_id
  33         - vendor
  34         - device
  35         - subvendor
  36         - subdevice
  37         - class
  38         - class\\_mask
  39         - driver\\_data
  40 * PCI\\_ANY\\_ID
  41 * PCI\\_DEVICE
  42 * PCI\\_DEVICE\\_CLASS
  43 * DEFINE\\_PCI\\_DEVICE\\_TABLE
  44
  45 # PCI Drivers
  46
  47 * struct pci\\_driver
  48         - name
  49         - id\\_table
  50         - probe
  51         - remove
  52 * pci\\_register\\_driver
  53 * pci\\_unregister\\_driver
  54
  55 # PCI Device
  56
  57 * struct pci\\_dev
  58 * pci\\_enable\\_device
  59 * pci\\_disable\\_device
  60 * pci\\_set\\_drvdata
  61
  62 # Accessing the configuration space
  63
  64 * pci\\_read\\_config\\_byte(dev, where, *val)
  65 * pci\\_read\\_config\\_word(dev, where, *val)
  66 * pci\\_read\\_config\\_dword(dev, where, *val)
  67 * pci\\_write\\_config\\_byte(dev, where, val)
  68 * pci\\_write\\_config\\_word(dev, where, val)
  69 * pci\\_write\\_config\\_dword(dev, where, val)
  70
  71 # PCI Resources
  72
  73 * pci\\_resource\\_start(dev, bar)
  74 * pci\\_resource\\_end(dev, bar)
  75 * pci\\_resource\\_len(dev, bar)
  76 * pci\\_resource\\_flags(dev, bar)
  77         - IORESOURCE\\_IO
  78         - IORESOURCE\\_MEM
  79
  80 # Using PCI devices
  81
  82 * pci\\_request\\_regions
  83 * pci\\_release\\_regions
  84 * pci\\_iomap
  85 * pci\\_ioremap\\_bar
  86 * struct pci\\_dev
  87         - irq