CVS commit: [riastradh-drm2] src/sys/external/bsd/drm2

["Taylor R Campbell" <riastradh%netbsd.org@localhost>]

Module Name:    src
Committed By:   riastradh
Date:           Wed Jan 22 14:58:47 UTC 2014

Modified Files:
        src/sys/external/bsd/drm2/dist/uapi/drm [riastradh-drm2]: drm.h
        src/sys/external/bsd/drm2/drm [riastradh-drm2]: drm_drv.c drm_vm.c

Log Message:
Implement mmap on a drm device by a new kludgey ioctl.

There is currently no way to set up a custom choice of uvm object and
uvm pager ops for mmap: struct fileops has no fo_mmap, and device
nodes get to say only what paddr each offset maps to, not what uvm
object to use.  For now, to avoid kernel changes outside the drm2
tree, we'll use a non-standard drm ioctl that calls uvm_map.  This
requires source patches to userland programs, but for the most part
they can simply be converted from calling mmap to drmMap, which will
be adapted to use the ioctl.

This is not necessarily a permanent solution.


To generate a diff of this commit:
cvs rdiff -u -r1.1.1.1.2.3 -r1.1.1.1.2.4 \
    src/sys/external/bsd/drm2/dist/uapi/drm/drm.h
cvs rdiff -u -r1.1.2.31 -r1.1.2.32 src/sys/external/bsd/drm2/drm/drm_drv.c
cvs rdiff -u -r1.1.2.2 -r1.1.2.3 src/sys/external/bsd/drm2/drm/drm_vm.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.