From: Ben Widawsky <ben@bwidawsk.net>
Date: Fri, 6 Dec 2013 22:11:02 +0000 (-0800)
Subject: drm/i915: Track which ring a context ran on
X-Git-Tag: v3.15-rc1~51^2~62^2~80^2~39
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0009e46cd54324c4af20b0b52b89973b1b914167;p=pandora-kernel.git

drm/i915: Track which ring a context ran on

Previously we dropped the association of a context to a ring. It is
however very important to know which ring a context ran on (we could
have reused the other member, but I was nitpicky).

This is very important when we switch address spaces, which unlike
context objects, do change per ring.

As an example, if we have:

        RCS   BCS
ctx            A
ctx      A
ctx      B
ctx            B

Without tracking the last ring B ran on, we wouldn't know to switch the
address space on BCS in the last row.

As a result, we no longer need to track which ring a context "belongs"
to, as it never really made much sense anyway.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

Reading git-diff-tree failed