From: Alex Deucher <alexander.deucher@amd.com>
Date: Wed, 26 Jun 2013 21:37:11 +0000 (-0400)
Subject: drm/radeon/cik: Add support for compute queues (v4)
X-Git-Tag: v3.11-rc1~65^2~60^2~115
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=963e81f9e060113d3bec1aa95eac76a7d3810879;p=pandora-kernel.git

drm/radeon/cik: Add support for compute queues (v4)

On CIK, the compute rings work slightly differently than
on previous asics, however the basic concepts are the same.

The main differences:
- New MEC engines for compute queues
- Multiple queues per MEC:
  - CI/KB: 1 MEC, 4 pipes per MEC, 8 queues per pipe = 32 queues
  -    KV: 2 MEC, 4 pipes per MEC, 8 queues per pipe = 64 queues
- Queues can be allocated and scheduled by another queue
- New doorbell aperture allows you to assign space in the aperture
  for the wptr which allows for userspace access to queues

v2: add wptr shadow, fix eop setup
v3: fix comment
v4: switch to new callback method

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
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