PCI eXpress Driver

PCI eXpress driver for Altera Cyclone V GT board

CAEN els d.o.o.

Author

Jan Marjanovic

Date

March 2013

Version

0.7

Change log

• version 0.7:
  • implemented multiple buffers, mutiple DMAs
• version 0.6:
  • implemented mailbox communication
• version 0.5:
  • implemented cyclic buffer
• version 0.4:
  • added ioctl function
• version 0.3:
  • added interrupts

Main driver file

BEST_PCIe.c

Header file

BEST_PCIe.h (also for user space programs)

Description

- PCI eXpress device driver for Altera Cyclone V GT board.
- Tested on kernel 3.13

Build

make

Insert: (insert_module.sh)

• Insert module in kernel
• Find major number
• Create node in /dev
• Change permission on node

Remove: (remove_module.sh)

• Remove node
• Remove module from kernel

Usage

1. Open file

   fd = open("/dev/best0", O_RDWR);

2. Read status using ioctl to determine which is the last buffer valid.

   ioctl(fd, IOCTL_READ_STATUS, &data);

3. Set buffer to read from using ioctl command.

   ioctl(fd, IOCTL_WRITE_BUF_NR, data.last_buff_valid);

4. Read from buffer

   read(fd, buf, data.buff_len );

5. Close

   close(fd);