I'm trying to create a driver that will memory map locations in a spi device to a kmalloc'd buffer by a driver. I was thinking that the driver should implement mmap that when mmap is called by a user process it returns a pointer to a kmalloc'd buffer in the driver. Whenever the user accesses that buffer using the pointer returned the driver will get notified and kick off a tasklet to send the page (or just the indivual memory location) that was written to by the user to the spi device connected. I don't know of a methodology to do the notification. I've looked at vm_operatons_struct but the functions only seem to get called on a page fault or protected access. Any help would be great. Also let me know if this is not even possible. Thanks in advance. Greg _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
