In Ethernet PCI device driver if the driver allows applications to map user-space buffer to Driver virtual memory and allow the user to call MMAP on device driver file after opening it. Then how do implement MMAP in the PCI ETHERNET Network device driver?
I have already looked in the dev_pci struct. There are some members that are named as they have something to do with MMAP but I could not pinpoint how to make a device driver implement MMAP.
In the book Linux Device Driver, the author did not specifically relate Memory Mapping in device driver with PCI device driver or Network device driver.
Any help on how to enable my PCI/Network/Ethernet device driver to handle MMAP calls from user space and mapping the user is given buffer into the driver's virtual memory I am looking for especially how to register XX___mmap(...) implementation function in the device driver with PCI and network device driver. I have dev_pci and net_dev device drivers in a device driver.
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