Now that PC8 is part of runtime PM, the check is useless.
Signed-off-by: NPaulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: NImre Deak <imre.deak@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Just because I have a SNB machine and I can easily test it.
Signed-off-by: NPaulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Now that we don't keep the hotplug interrupts enabled anymore, we can
kill the regsave struct and just cal the normal IRQ preinstall,
postinstall and uninstall functions. This makes it easier to add
runtime PM support to non-HSW platforms.

The only downside is in case we get a request to update interrupts
while they are disabled, won't be able to update the regsave struct.
But this should never happen anyway, so we're not losing too much.

v2: - Rebase.
v3: - Rebase.
v4: - Rebase.
Signed-off-by: NPaulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: NImre Deak <imre.deak@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

This patch reads the DRRS support and Mode type from VBT fields.
The read information will be stored in VBT struct during BIOS
parsing. The above functionality is needed for decision making
whether DRRS feature is supported in i915 driver for eDP panels.
This information helps us decide if seamless DRRS can be done
at runtime to support certain power saving features. This patch
was tested by setting necessary bit in VBT struct and merging
the new VBT with system BIOS so that we can read the value.

v2: Incorporated review comments from Chris Wilson
Removed "intel_" as a prefix for DRRS specific declarations.

v3: Incorporated Jani's review comments
Removed function which deducts drrs mode from panel_type. Modified some
print statements. Made changes to use DRRS_NOT_SUPPORTED as 0 instead of -1.

v4: Incorporated Jani's review comments.
Modifications around setting vbt drrs_type.
Signed-off-by: NPradeep Bhat <pradeep.bhat@intel.com>
Signed-off-by: NVandana Kannan <vandana.kannan@intel.com>
Acked-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
[danvet: Drop the misleading/redundant comment about the added drrs
field in the vbt struct as discussed with Jani on irc.]
Reviewed-by: NJani Nikula <jani.nikula@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

There are no longer users of drm_i915_private_t. Drop the typedef. Good
riddance.
Signed-off-by: NJani Nikula <jani.nikula@intel.com>
Acked-by: NChris Wilson <chris@chris-wislon.co.uk>
[danvet: Add the hunk in i915_cmd_parser.c here which had to be
relocated to the how this was merged.]
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

These defines are only used in intel_uncore.c.
Signed-off-by: NDamien Lespiau <damien.lespiau@intel.com>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

That function isn't used outside this file anymore.
Signed-off-by: NDamien Lespiau <damien.lespiau@intel.com>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Instead of reading out the CD clock rate from the HW at each modeset, do
this only during driver init and resume and use the cached value during
modeset. This moves things towards a state where the sw and hw side
setup is separated. It's also needed for VLV RPM, where we don't put
device into D0 state until modeset_global_resources is called and thus
can't access any display/gfx registers.
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NAntti Koskipää <antti.koskipaa@linux.intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

So userspace can query the kernel for command parser support.

v2: Add i915_cmd_parser_get_version(), history log, and kerneldoc

OTC-Tracker: AXIA-4631
Change-Id: I58af650db9f6753c2dcac9c54ab432fd31db302f
Signed-off-by: NBrad Volkin <bradley.d.volkin@intel.com>
Reviewed-by: NJani Nikula <jani.nikula@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Various commands that access memory have a bit to determine whether
the graphics address specified in the command should use the GGTT or
PPGTT for translation. These checks ensure that the bit indicates
PPGTT translation.

Most of these checks use the existing bit-checking infrastructure.
The PIPE_CONTROL and MI_FLUSH_DW commands, however, are multi-function
commands. The GGTT/PPGTT bit is only relevant for certain uses of the
command. As such, this change also extends the bit-checking code to
include a "condition" mask and offset. If the condition mask is non-zero
then the parser only performs the bit check when the bits specified by
the condition mask/offset are also non-zero.

NOTE: At this point in the series PPGTT must be enabled for the parser
to work correctly. If it's not enabled, userspace will not be setting
the PPGTT bits the way the parser requires. VLV is the only platform
where this is a problem, so at this point, we disable parsing for VLV.

v2: whitespace and trailing commas fixes, rebased

OTC-Tracker: AXIA-4631
Change-Id: I3f4c76b6734f1956ec47e698230f97d0998ff92b
Signed-off-by: NBrad Volkin <bradley.d.volkin@intel.com>
Reviewed-by: NJani Nikula <jani.nikula@intel.com>
[danvet: Drop the unecessary cast Jani spotted.]
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

This file contains all necessary defines, prototypes and typesdefs for
manipulating GEN graphics address translation (this does not include the
legacy AGP driver)

Reiterating the comment in the header,
"Please try to maintain the following order within this file unless it
makes sense to do otherwise. From top to bottom:
1. typedefs
2. #defines, and macros
3. structure definitions
4. function prototypes

Within each section, please try to order by generation in ascending
order, from top to bottom (ie. GEN6 on the top, GEN8 on the bottom)."

I've made some minor cleanups, and fixed a couple of typos while here -
but there should be no functional changes.

The purpose of the patch is to reduce clutter in our main header file,
making room for new growth, and make documentation of our interfaces
easier by splitting things out.

With a little more work, like making i915_gtt a pointer, we could
potentially completely isolate this header from i915_drv.h. At the
moment however, I don't think it's worth the effort.

Personally, I would have liked to put the PTE encoding functions in this
file too, but I didn't want to rock the boat too much.

A similar patch has been in use on my machine for some time. This exact
patch though has only been compile tested.
Signed-off-by: NBen Widawsky <ben@bwidawsk.net>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Remove the rest of the references to drm_i915_private_t. No functional
changes.
Signed-off-by: NJani Nikula <jani.nikula@intel.com>
[danvet: Drop hunk in i915_cmd_parser.c]
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

This reverts commit 27544369.

Conflicts:
	drivers/gpu/drm/i915/i915_irq.c

The partial application of interrupt masking without regard to other
pathways for adjusting the RPS frequency results in completely disabling
the PM interrupts. This leads to excessive power consumption as the GPU
is kept at max clocks (until the failsafe mechanism fires of explicitly
downclocking the GPU when all requests are idle). Or equally as bad for
the UX, the GPU is kept at minimum clocks and prevented from upclocking
in response to a requirement for more power.

Testcase: pm_rps/blocking
Cc: Deepak S <deepak.s@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: NDeepak S <deepak.s@linux.intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

As Broadwell has an increased virtual address size, it requires more
than 32 bits to store offsets into its address space. This includes the
debug registers to track the current HEAD of the individual rings, which
may be anywhere within the per-process address spaces. In order to find
the full location, we need to read the high bits from a second register.
We then also need to expand our storage to keep track of the larger
address.

v2: Carefully read the two registers to catch wraparound between
    the reads.
v3: Use a WARN_ON rather than loop indefinitely on an unstable
    register read.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Cc: Ben Widawsky <benjamin.widawsky@intel.com>
Cc: Timo Aaltonen <tjaalton@ubuntu.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Reviewed-by: NBen Widawsky <ben@bwidawsk.net>
[danvet: Drop spurious hunk which conflicted.]
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

When we use different rps events for different platforms or due to wa,
we might end up needing this logic in a lot of places. Instead of
this let's use a variable in dev_priv to track the enabled PM
interrupts.

v2: Initialize pm_rps_events in intel_irq_init() (Ville).
Signed-off-by: NDeepak S <deepak.s@linux.intel.com>
Reviewed-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
[danvet: Frob the commit message a bit since the English was a bit too
garbled ;-) ]
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

It is important that the user is fully aware that the seemingly atomic
read/write of a 64-bit value from MMIO space, may in fact be 2 separate
operations of 32-bits. This can lead to hilarity, such as

commit d18b9619
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Wed Jul 10 13:36:23 2013 +0100

    drm/i915: Fix incoherence with fence updates on Sandybridge+
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

The idea of printing objects used by each process is to judge how each
process is using them. This means that we need to evaluate whether the
object is bound for that particular process, rather than just whether it
is bound into the global GTT.

v2: Restore the non-full-ppgtt path for simplicity as we may not even
    create vma with older hardware.

v3: Tweak handling of global entries and default context entries.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Cc: Ben Widawsky <benjamin.widawsky@intel.com>
Reviewed-by: NBen Widawsky <ben@bwidawsk.net>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

The names of the struct members for RPS are stupid. Every time I need to
do anything in this code I have to spend a significant amount of time to
remember what it all means. By renaming the variables (and adding the
comments) I hope to clear up the situation. Indeed doing this make some
upcoming patches more readable.

I've avoided ILK because it's possible that the naming used for Ironlake
matches what is in the docs. I believe the ILK power docs were never
published, and I am too lazy to dig them up.

v2: leave rp0, and rp1 in the names. It is useful to have these limits
available at times. min_freq and max_freq (which may be equal to rp0, or
rp1 depending on the platform) represent the actual HW min and max.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NBen Widawsky <ben@bwidawsk.net>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

this leaves a temporarily awkward min_delay (the soft limit) with the
new min_freq (the hardware limit). It's fixed in the next patch.
Signed-off-by: NBen Widawsky <ben@bwidawsk.net>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Now that PC8 got much simpler, there are less things to document.
Also, runtime PM already has a nice documentation, so we don't need to
re-explain it on our driver.

v2: - Rebase.
    - Fix typo (Jesse).
Reviewed-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: NPaulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

The only remaining field of the struct was the lock, which was
useless.

v2: - Rebase.
Reviewed-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: NPaulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

When other platforms add runtime PM support they will also need to
disable interrupts, so move the variable to the runtime PM struct.

Also notice that the longer-term goal is to completely kill the
regsave struct, and I even have patches for that.

v2: - Rebase.
v3: - Rebase.
Reviewed-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: NPaulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

It was just being used on debugfs and on a WARN inside
hsw_set_power_well. But now that we PC8 is part of runtime PM and we
get/put runtime PM when we get/put any power domain, we shouldn't need
the WARN anymore.

v2: - Rebase.
v3: - Rebase.
Reviewed-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: NPaulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Since after the latest patches it's only being used to prevent
getting/putting the runtime PM refcount.
Reviewed-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: NPaulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

The requirements_met variable was used to track two things: enabled
CRTCs and the power well. After the latest chagnes, we get a runtime
PM reference whenever we get any of the power domains, and we get
power domains when we enable CRTCs or the power well, so we should
already be covered, not needing this specific tracking.

v2: - Rebase.
v3: - Rebase.
Signed-off-by: NPaulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: NImre Deak <imre.deak@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Currently, when our driver becomes idle for i915.pc8_timeout (default:
5s) we enable PC8, so we save some power, but not everything we can.
Then, while PC8 is enabled, if we stay idle for more
autosuspend_delay_ms (default: 10s) we'll enter runtime PM and put the
graphics device in D3 state, saving even more power. The two features
are separate things with increasing levels of power savings, but if we
disable PC8 we'll never get into D3.

While from the modularity point of view it would be nice to keep these
features as separate, we have reasons to merge them:
 - We are not aware of anybody wanting a "PC8 without D3" environment.
 - If we keep both features as separate, we'll have to to test both
   PC8 and PC8+D3 code paths. We're already having a major pain to
   make QA do automated testing of just one thing, testing both paths
   will cost even more.
 - Only Haswell+ supports PC8, so if we want to add runtime PM support
   to, for example, IVB, we'll have to copy some code from the PC8
   feature to runtime PM, so merging both features as a single thing
   will make it easier for enabling runtime PM on other platforms.

This patch only does the very basic steps required to have PC8 and
runtime PM merged on a single feature: the next patches will take care
of cleaning up everything.

v2: - Rebase.
v3: - Rebase.
    - Fully remove the deprecated i915 params since Daniel doesn't
      consider them as part of the ABI.
v4: - Rebase.
    - Fix typo in the commit message.
v5: - Rebase, again.
    - Add a huge comment explaining the different forcewake usage
      (Chris, Daniel).
    - Use open-coded forcewake functions (Daniel).
Signed-off-by: NPaulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: NImre Deak <imre.deak@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

The name 'update_plane' was used both for the primary plane functions in
intel_display.c and the sprite/overlay functions in intel_sprite.c.
Rename the primary plane functions to 'update_primary_plane' to avoid
confusion.

On a similar note, intel_display.c already had a function called
intel_disable_primary_plane() that programs the hardware to disable a
pipe's primary plane.  When we hook up primary planes through the DRM
plane interface, one of the natural handler names will be
intel_primary_plane_disable(), which is very similar.  To avoid
confusion, rename the existing intel_disable_primary_plane() to
intel_disable_primary_hw_plane() to make the two names a little more
distinct.

Cc: Intel Graphics Development <intel-gfx@lists.freedesktop.org>
Signed-off-by: NMatt Roper <matthew.d.roper@intel.com>
[danvet: Fix up conflicts.]
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

When adding new gunk, _always_ think of a good place. Start/end
usually just means that this didn't happen, and on top of that results
in needless conflicts with other patches doing the same.

Introduced in

commit 62d5d69b
Author: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Date:   Tue Feb 25 17:11:28 2014 +0200

    drm/i915: Add suspend count to error state

Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Early at init time, we can try to read out the plane config structure
and try to preserve it if possible.

v2: alloc fb obj at init time after fetching plane config
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

The command parser scans batch buffers submitted via execbuffer ioctls before
the driver submits them to hardware. At a high level, it looks for several
things:

1) Commands which are explicitly defined as privileged or which should only be
   used by the kernel driver. The parser generally rejects such commands, with
   the provision that it may allow some from the drm master process.
2) Commands which access registers. To support correct/enhanced userspace
   functionality, particularly certain OpenGL extensions, the parser provides a
   whitelist of registers which userspace may safely access (for both normal and
   drm master processes).
3) Commands which access privileged memory (i.e. GGTT, HWS page, etc). The
   parser always rejects such commands.

See the overview comment in the source for more details.

This patch only implements the logic. Subsequent patches will build the tables
that drive the parser.

v2: Don't set the secure bit if the parser succeeds
Fail harder during init
Makefile cleanup
Kerneldoc cleanup
Clarify module param description
Convert ints to bools in a few places
Move client/subclient defs to i915_reg.h
Remove the bits_count field

OTC-Tracker: AXIA-4631
Change-Id: I50b98c71c6655893291c78a2d1b8954577b37a30
Signed-off-by: NBrad Volkin <bradley.d.volkin@intel.com>
Reviewed-by: NJani Nikula <jani.nikula@intel.com>
[danvet: Appease checkpatch.]
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

The command parser is going to need the same synchronization and
setup logic, so factor it out for reuse.

v2: Add a check that the object is backed by shmem
Signed-off-by: NBrad Volkin <bradley.d.volkin@intel.com>
Reviewed-by: NJani Nikula <jani.nikula@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Based on an early draft from Jesse.

Add support for powering on/off the dynamic power wells on VLV by
registering its display and dpio dynamic power wells with the power
domain framework.

For now power on all PHY TX lanes regardless of the actual lane
configuration. Later this can be optimized when the PHY side setup
enables only the required lanes. Atm, it enables all lanes in all
cases.

v2:
- undef function local COND macro after its last use (Ville)
- Take dev_priv->irq_lock around the whole sequence of
  intel_set_cpu_fifo_underrun_reporting_nolock() and
  valleyview_disable_display_irqs(). They are short and releasing
  the lock in between only makes proving correctness more difficult.
- sanitize local var names in vlv_power_well_enabled()
v3:
- rebase on latest -nightly
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NJesse Barnes <jbarnes@virtuousgeek.org>
[danvet: Resolve conflict due to my changes in the previous patch.
Also throw in an assert_spin_locked for safety. And finally appease
checkpatch.]
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

We'll need to disable/re-enable the display-side IRQs when turning
off/on the VLV display power well. Factor out the helper functions
for this. For now keep the display IRQs enabled by default, so the
functionality doesn't change. This will be changed to enable/disable
the IRQs on-demand when adding support for VLV power wells in an
upcoming patch.

v2:
- take the irq spin lock for the whole enable/disable sequence as
  these can be called with interrupts enabled
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Parts that poke port specific HW blocks like the encoder HW state
readout or connector hotplug detect code need a way to check whether
required power domains are on or enable/disable these. For this purpose
add a set of power domains that refer to the port HW blocks. Get the
proper port power domains during modeset.

For now when requesting the power domain for a DDI port get it for a 4
lane configuration. This can be optimized later to request only the 2
lane power domain, when proper support is added on the VLV PHY side for
this. Atm, the PHY setup code assumes a 4 lane config in all cases.
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Split the 'set' power well handler into an 'enable', 'disable' and
'sync_hw' handler. This maps more conveniently to higher level
operations, for example it allows us to push the hsw package c8 handling
into the corresponding hsw/bdw enable/disable handlers and the hsw BIOS
hand-over setting into the hsw/bdw sync_hw handler.

No functional change.
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NJesse Barnes <jbarnes@virtuousgeek.org>
[danvet: Appease checkpatch's whitespace complaints.]
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

These macros are used only locally, so move them to the .c file.

No functional change.

v2:
- add init power domain to always-on power wells in the following
  - separate - patch (Paulo)
Signed-off-by: NImre Deak <imre.deak@intel.com>
Reviewed-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

There are too many oustanding issues:

- Fence handling in the current code is broken. There's a patch series
  from me, but it's blocked on and extended review (which includes
  writing the testcases).

- IOMMU mapping handling is broken, we need to properly refcount it -
  currently it gets destroyed when the first vma is unbound, so way
  too early.

- There's a pending reset issue on snb. Since Mika's reset work and
  full ppgtt have been pulled in in separate branches and ended up
  intermittingly breaking each another it's unclear who's the exact
  culprit here.

- We still have persistent evidince of crazy recursion bugs through
  vma_unbind and ppgtt_relase, e.g.

  https://bugs.freedesktop.org/show_bug.cgi?id=73383

  This issue (and a few others meanwhile resolved) have blocked our
  performance measuring/tuning group since 3 months.

- Secure batch dispatching is broken. This is blocking Brad Volkin's
  command checker work since 3 months.

All these issues are confirmed to only happen when full ppgtt is
enabled, falling back to aliasing ppgtt resolves them. But even
aliasing ppgtt itself still has a regression:

- We currently unconditionally bind objects into the aliasing ppgtt,
  which means all priviledged objects like ringbuffers are visible to
  unpriviledged access again. On top of that this also breaks the
  command checker for aliasing ppgtt, since it can't hide the
  validated batch any more.

Furthermore topic/full-ppgtt has never been reviewed:

- Lifetime rules around vma unbinding/release are unclear, resulting
  into this awesome hack called ppgtt_release. Which seems to take the
  blame for most of the recursion fallout.

- Context/ring init works different on gpu reset than anywhere else.
  Such differeneces have in the past always lead to really hard to
  track down bugs.

- Aliasing ppgtt is treated in a bunch of places as a real address
  space, but it isn't - the real address space is always the global
  gtt in that case. This results in a bit a mess between contexts and
  ppgtt object, further complication the context/ppgtt/vma lifetime
  rules.

- We don't have any docs describing the overall concepts introduced
  with full ppgtt. A short, concise overview describing vmas and some
  of the strange bits around them (like the unbound vmas used by
  execbuf, or the new binding rules) really is needed.

Note that a lot of the post topic/full-ppgtt merge fallout has already
been addressed, this entire list here of 10 issues really only contains
the still outstanding issues.

Finally the 3.15 merge window is approaching and I think we need to
use the remaining time to ensure that our fallback option of using
aliasing ppgtt is in solid shape. Hence I think it's time to throw the
switch. While at it demote the helper from static inline status
because really.

Cc: Ben Widawsky <ben@bwidawsk.net>
Cc: Dave Airlie <airlied@gmail.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

That macro was only ever used to convert ring->private into a gem object
(hence the forceful cast). ring->private doesn't even exist anymore as
it was transmogrified by Chris in:

  commit 0d1aacac
  Author: Chris Wilson <chris@chris-wilson.co.uk>
  Date:   Mon Aug 26 20:58:11 2013 +0100

      drm/i915: Embed the ring->private within the struct intel_ring_buffer
Signed-off-by: NDamien Lespiau <damien.lespiau@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Its last usage outside of i915_gem.c was removed in:

  commit 1f70999f
  Author: Chris Wilson <chris@chris-wilson.co.uk>
  Date:   Mon Jan 27 22:43:07 2014 +0000

     drm/i915: Prevent recursion by retiring requests when the ring is full
Signed-off-by: NDamien Lespiau <damien.lespiau@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

In the future, we need to be able to specify per-pipe number of
planes/sprites. Let's start today!
Signed-off-by: NDamien Lespiau <damien.lespiau@intel.com>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>