freebsd-skq/sys/ofed
jhb 61b7ea7a3d Currently the Linux character device mmap handling only supports mmap
operations that map a single page that has an associated vm_page_t.
This does not permit mapping larger regions (such as a PCI memory
BAR) and it does not permit mapping addresses beyond the top of RAM
(such as a 64-bit BAR located above the top of RAM).

Instead of using a single OBJT_DEVICE object and passing the physaddr via
the offset as a hack, create a new sglist and OBJT_SG object for each
mmap request. The requested memory attribute is applied to the object
thus affecting all pages mapped by the request.

Reviewed by:	hselasky, np
MFC after:	1 week
Sponsored by:	Chelsio
Differential Revision:	https://reviews.freebsd.org/D3386
2015-09-03 18:27:39 +00:00
..
drivers Reinstate unify_tcp_port_space and associated code that was lost during 2015-08-12 22:09:58 +00:00
include Currently the Linux character device mmap handling only supports mmap 2015-09-03 18:27:39 +00:00