RE: getting data from a pci driver

["Rajat Jain" <Rajat.Jain@xxxxxxxxxxxx>]

Hi,

> I have a doubt regarding the PCI driver. After probing the pci device
> we can get data from the device through write or inb function. How
> does the application get data from the driver? Do we implement read
> and write functions? If so how to actually implement. I went through
> two or three driver codes but none implemented the read and write
> functions. Any pointers to a driver code which implements this will be
> helpful.
> 

PCI is just an interface that is used by devices to connect to the system. So typically you do not write a "PCI driver", but you write a driver for an ethernet card that connects to a PCI slot. So the driver would pci_register_driver() to attach to PCI subsystem, and upon finding an appropriate device, would do register_netdev() ... and what ever. And yes, you can export data to userland by sysfs / procfs etc..

Thanks,

Rajat

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