README

This is a simple tool to access a PCIe device's MMIO register in Linux user space.


DIFFERENT TO "uio_reg"
I wrote a similar tool named "uio_reg" (https://github.com/Dong-Wang/uio_reg) which only support igb_uio driver.
"mmio-reg" can support all PCIe device's kernel driver, I list them in Table 1.

Table 1 supported kernel driver
+----------+---------------------------+-----------------+---------+------+
|          | native driver (e.g.ixgbe) | uio_pci_generic | igb_uio | vfio |
+----------+---------------------------+-----------------+---------+------+
| uio_reg  |            NO             |        NO       |   YES   |  no  |
+----------+---------------------------+-----------------+---------+------+
| mmio-reg |            YES            |        YES      |   YES   |  YES |
+----------+---------------------------+-----------------+---------+------+