tree ed457db4cfb202015866a131ad4e742503728fad
parent 35e4b7af21d77933abda3d41d1672589eb6c960c
author Dave Airlie <airlied@redhat.com> 1253688987 +1000
committer Dave Airlie <airlied@linux.ie> 1253848098 +1000

drm/radeon/kms: don't require up to 64k allocations. (v2)

This avoids needing to do a kmalloc > PAGE_SIZE for the main
indirect buffer chunk, it adds an accessor for all reads from
the chunk and caches a single page at a time for subsequent
reads.

changes since v1:
Use a two page pool which should be the most common case
a single packet spanning > PAGE_SIZE will be hit, but I'm
having trouble seeing anywhere we currently generate anything like that.
hopefully proper short page copying at end
added parser_error flag to set deep errors instead of having to test
every ib value fetch.
fixed bug in patch that went to list.

Signed-off-by: Dave Airlie <airlied@redhat.com>