PCI memory alloc..!

[M. Warner Losh]

In message: <BAY22-F21n8P5o7P6um0003a4ff at hotmail.com>
            "Auge Mike" <tobe_better at hotmail.com> writes:
: While I was trying to track to find out how a device alloc a new memory 
: resource, I have been little confused on finding out how the new PCI device 
: can deal with a case when the activation calls pmap_mapdev????
: 
: What I need to understand that what will happen if pmap_mapdev allocated a 
: new space that dose not match what is expected by the device and determined 
: by r_start and r_end ??

The pci bus deals with allocating and mapping the memory.  Getting the
bus handle and bus tags will let you access it via the bus_space
routines or the bus_dma routines.  pmap_mamdev is done under the
covers and you'll not need to worry about such things.

Warner