GitHub/moto-9609/android_kernel_motorola_exynos9610.git
11 years agodrm/i915/bdw: Change dp aux timeout to 600us on DDIA
Ben Widawsky [Tue, 5 Nov 2013 07:11:32 +0000 (23:11 -0800)]
drm/i915/bdw: Change dp aux timeout to 600us on DDIA

Cc: Art Runyan <arthur.j.runyan@intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Enable trickle feed on Broadwell
Ville Syrjälä [Sun, 3 Nov 2013 11:47:27 +0000 (13:47 +0200)]
drm/i915/bdw: Enable trickle feed on Broadwell

Like on HSW, trickle feed should always be enabled on BDW.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: WaSingleSubspanDispatchOnAALinesAndPoints
Ben Widawsky [Sun, 3 Nov 2013 04:08:00 +0000 (21:08 -0700)]
drm/i915/bdw: WaSingleSubspanDispatchOnAALinesAndPoints

Implement WaSingleSubspanDispatchOnAALinesAndPoints

BDW-A workaround.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: conservative SBE VUE cache mode
Ben Widawsky [Sun, 3 Nov 2013 04:07:59 +0000 (21:07 -0700)]
drm/i915/bdw: conservative SBE VUE cache mode

Hold vertex data in cache until last reference

BDW-A workaround

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Limit SDE poly depth FIFO to 2
Ben Widawsky [Sun, 3 Nov 2013 04:07:58 +0000 (21:07 -0700)]
drm/i915/bdw: Limit SDE poly depth FIFO to 2

BDW-A workaround

BDW Bug #1899155

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Sampler power bypass disable
Ben Widawsky [Sun, 3 Nov 2013 04:07:57 +0000 (21:07 -0700)]
drm/i915/bdw: Sampler power bypass disable

BDW-A workaround.

BDW Bug #1899812

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agoddrm/i915/bdw: Disable centroid pixel perf optimization
Ben Widawsky [Tue, 5 Nov 2013 06:52:39 +0000 (22:52 -0800)]
ddrm/i915/bdw: Disable centroid pixel perf optimization

BDW-A workaround

BDW Bug #1899532

v2: WARN on when not using preliminary HW support

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Jesse Barnes <jbarnes@virtuosugeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: BWGTLB clock gate disable
Ben Widawsky [Sun, 3 Nov 2013 04:07:55 +0000 (21:07 -0700)]
drm/i915/bdw: BWGTLB clock gate disable

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Jesse Barnes <jbarnes@virtuosugeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Implement edp PSR workarounds
Ben Widawsky [Sun, 3 Nov 2013 04:07:54 +0000 (21:07 -0700)]
drm/i915/bdw: Implement edp PSR workarounds

This implements a workaround for PSR dealing with some vblank issue.

WaPsrDPAMaskVBlankInSRD && WaPsrDPRSUnmaskVBlankInSRD

v2: forgot to git add bogus whitespace fix

v3: Update with workaround names.
Use for_each_pipe() and CHICKEN_PIPESL_1(pipe) macro (Ville)

Cc: Art Runyan <arthur.j.runyan@intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Jesse Barnes <jbarnes@virtuosugeek.org>
[danvet: Kill redundant IS_BDW check and remove the copious amount of
uneeded lines added.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Disable semaphores
Ben Widawsky [Tue, 5 Nov 2013 03:45:44 +0000 (19:45 -0800)]
drm/i915/bdw: Disable semaphores

We've done insufficient testing on them thus far, so keep them disabled
until we do test.

v2: Use WARN when not enabling preliminary HW support as this should
only be disabled for that case.

v3: Rip out the now useless (and really noisy) DRM_INFO output.

Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Jesse Barnes <jbarnes@virtuosugeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Create a separate BDW rps enable
Ben Widawsky [Sun, 3 Nov 2013 04:07:52 +0000 (21:07 -0700)]
drm/i915/bdw: Create a separate BDW rps enable

This is mostly what we have for HSW with the exceptions of:
no writes:
  GEN6_RC1_WAKE_RATE_LIMIT
  GEN6_RC6pp_WAKE_RATE_LIMIT
  GEN6_RC1e_THRESHOLD
  GEN6_RC6p_THRESHOLD
  GEN6_RC6pp_THRESHOLD

GEN6_RP_DOWN_TIMEOUT - use 1s instead of 1.28s

Don't try to overclock, or program ring/IA frequency tables since we
don't quite have sufficient docs yet.

NOTE: These values do not reflect the changes made recently by Chris.
Since we have no evidence yet what the proper way to tweak for this
platform is, I think it is good to go, and can be optimized by Chris, or
whomever, later.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
[danvet: Drop spurious hunk and drop TODO - having per-platform rps
register frobbing code is in my opinion preferred, now that all the
infrastructure functions are extracted.]
Reviewed-by: Jesse Barnes <jbarnes@virtuosugeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Broadwell has a max port clock of 300Mhz on HDMI
Damien Lespiau [Sun, 3 Nov 2013 04:07:51 +0000 (21:07 -0700)]
drm/i915/bdw: Broadwell has a max port clock of 300Mhz on HDMI

Just like HSW.

This means we can scan out a mode with a 300Mhz pixel clock with a depth
of 24 bits, but only a 200Mhz one with a 36bits depth.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Don't wait for c0 threads on forcewake
Ben Widawsky [Sun, 3 Nov 2013 04:07:50 +0000 (21:07 -0700)]
drm/i915/bdw: Don't wait for c0 threads on forcewake

It's no longer a required workaround on BDW.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
[danvet: Move compile fix from a later patch to this one.]
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Use HSW formula for ring freq scaling
Ben Widawsky [Sun, 3 Nov 2013 04:07:49 +0000 (21:07 -0700)]
drm/i915/bdw: Use HSW formula for ring freq scaling

The current formula we use for HSW is not what is in current docs.
However, changing to the HSW formula on my HSW does not improve power
usage, and decreases performance by about 5% in limited xonotic testing.

For gen8, until we know otherwise, or run experiments, let's use
the HSW formula - which should be the same used in the Windows driver
(and thus help make an apples-applies comparison) on gen8.

v2: Use >= 8 instead of > 7 to be consistent with all other gen
checks.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net> (v1)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Support eDP PSR
Ben Widawsky [Tue, 5 Nov 2013 06:45:05 +0000 (22:45 -0800)]
drm/i915/bdw: Support eDP PSR

Broadwell PSR support is a superset of Haswell. With this simple
register base calculation, everything that worked on HSW for eDP PSR
should work on BDW.

Note that Broadwell provides additional PSR support. This is not
addressed at this time.

v2: Make the HAS_PSR include BDW

v3: Use the correct offset (I had incorrectly used one from my faulty
brain) (Art!)

v4: It helps if you git add

v5: Be explicit about not setting min link entry time for BDW. This
should be no functional change over v4 (Jani)

Reviewed-by: Art Runyan <arthur.j.runyan@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Use The GT mailbox for IPS enable/disable
Ben Widawsky [Sun, 3 Nov 2013 04:07:47 +0000 (21:07 -0700)]
drm/i915/bdw: Use The GT mailbox for IPS enable/disable

v2: Squash in fixup from Ben to synchronize the GT mailbox commands.

CC: Art Runyan <arthur.j.runyan@intel.com>
Reviewed-by: Art Runyan <arthur.j.runyan@intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Add Broadwell display FIFO limits
Ville Syrjälä [Sun, 3 Nov 2013 04:07:46 +0000 (21:07 -0700)]
drm/i915/bdw: Add Broadwell display FIFO limits

Broadwell has bigger display FIFOs than Haswell. Otherwise the
two are very similar.

v2: Fix FBC WM_LP shift for BDW

v3: Rebase on top of the big Haswell wm rework.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> (v2)
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: check DPD on port D when setting the DDI buffers
Paulo Zanoni [Sun, 3 Nov 2013 04:07:45 +0000 (21:07 -0700)]
drm/i915/bdw: check DPD on port D when setting the DDI buffers

Use the eDP values on platforms where port D is eDP. This doesn't
affect Haswell since it uses the same DDI buffer values for eDP and
DP.

Reviewed-by: Art Runyan <arthur.j.runyan@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: BDW also has only 2 FDI lanes
Paulo Zanoni [Sun, 3 Nov 2013 04:07:44 +0000 (21:07 -0700)]
drm/i915/bdw: BDW also has only 2 FDI lanes

So treat it like Haswell.

Reviewed-by: Art Runyan <arthur.j.runyan@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: add support for BDW DP voltage swings and pre-emphasis
Paulo Zanoni [Sun, 3 Nov 2013 04:07:43 +0000 (21:07 -0700)]
drm/i915/bdw: add support for BDW DP voltage swings and pre-emphasis

They're not the same as the Haswell ones.

Reviewed-by: Art Runyan <arthur.j.runyan@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Todd Previte <tprevite@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: add BDW DDI buf translations for eDP
Paulo Zanoni [Sun, 3 Nov 2013 04:07:42 +0000 (21:07 -0700)]
drm/i915/bdw: add BDW DDI buf translations for eDP

Broadwell has different DDI buffer translations for eDP and DP, so add
support for the missing eDP and keep Haswell the same.

A future patch addresses the suggestion from Art to check for eDP on
port D and use the eDP values there, too.

v2: Make checkpatch happy.

Reviewed-by: Art Runyan <arthur.j.runyan@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> (v1)
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Add BDW DDI buffer translation values
Art Runyan [Sun, 3 Nov 2013 04:07:41 +0000 (21:07 -0700)]
drm/i915/bdw: Add BDW DDI buffer translation values

Many of the DDI buffer translation values have changed for BDW.
Add new translation tables and selection between HSW and BDW.

v2: s/BUG/WARN/ to avoid breaking future GENs.

v3: Rebase on top of the hdmi translation table changes.

v4: Fix up the multiline comment while at it.

Signed-off-by: Art Runyan <arthur.j.runyan@intel.com> (v2)
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Implement WaSwitchSolVfFArbitrationPriority
Ben Widawsky [Sun, 3 Nov 2013 04:07:40 +0000 (21:07 -0700)]
drm/i915/bdw: Implement WaSwitchSolVfFArbitrationPriority

GEN8 also needs this workaround.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
[danvet: Add a generic comment that we need to recheck all these w/a.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Use pipe CSC on Broadwell
Ville Syrjälä [Sun, 3 Nov 2013 04:07:39 +0000 (21:07 -0700)]
drm/i915/bdw: Use pipe CSC on Broadwell

Route cursor and sprite data through the pipe CSC unit on BDW.
Primary plane data is already sent through the pipe CSC.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: get the correct LCPLL frequency on Broadwell
Paulo Zanoni [Sun, 3 Nov 2013 04:07:36 +0000 (21:07 -0700)]
drm/i915/bdw: get the correct LCPLL frequency on Broadwell

v2: Rebased onto Paulo's MHz->kHz change.

v3: Rebased on top of the Haswell pc8+ adjustements.

v4: Use the exact 337.5MHz clock, should have been done as part of v2.

Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> (v1)
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Broadwell has PIPEMISC
Paulo Zanoni [Sun, 3 Nov 2013 04:07:38 +0000 (21:07 -0700)]
drm/i915/bdw: Broadwell has PIPEMISC

And it inherits some bits from the previous TRANS_CONF (aka PIPE_CONF
on previous gens).

v2: Rebase on to of the pipe config bpp handling rework.

v3: Rebased on top of the pipe_config->dither refactoring.

v4: Drop the read-modify-write cycle for PIPEMISC, similarly to how we
now also build up PIPECONF completely ourselves - keeping around
random stuff set by the BIOS just isn't a good idea. I've checked BDW
BSpec and we already set all relevant bits.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> (v1)
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: on Broadwell, the panel fitter is on the pipe
Paulo Zanoni [Sun, 3 Nov 2013 04:07:37 +0000 (21:07 -0700)]
drm/i915/bdw: on Broadwell, the panel fitter is on the pipe

So you can use the panel fitter while the power well is disabled and
you also don't need to set the "pipe" bit.

v2: Rebased on top of Jesse's pfit refactor, which moved pfit state
into the pipe_config.

v3: Rebase on top of the latest Haswell/panel fitter rework, which
neatly resolves a FIXME we have in this patch here:

v4: Rebase on top of the new power domain framework.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> (v1)
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: pretend we have LPT LP on Broadwell
Paulo Zanoni [Sun, 3 Nov 2013 04:07:35 +0000 (21:07 -0700)]
drm/i915/bdw: pretend we have LPT LP on Broadwell

The platforms we currently have all have LPT LP on them. As such, we
have no way to identify the new WPT PCH that will ship with Broadwell.

NOTE: For all purposes relevant to the driver that this point, LPT and
WPT are equivalent. Therefore there should be no need to actually change
this for some time.

v2: Don't assign dev_priv->num_pch_pll any more.

v3: Rebase on top of the PCH detection changes for virtualized
enviroments.

v4: Wrote commit message

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> (v1)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> (v3)
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Broadwell also has the "power down well"
Paulo Zanoni [Sun, 3 Nov 2013 04:07:34 +0000 (21:07 -0700)]
drm/i915/bdw: Broadwell also has the "power down well"

Just like Haswell, but with the small twist that the panel fitter for pipe A is
now also in the always-on power well.

v2: Use the new HAS_POWER_WELL macro.

v3: Rebase on top of intel_using_power_well patches.

v4: This time actually update the PFIT check correctly so that the
pipe A pfit is in the always-on domain.

v5: Rebase on top of the VGA power domain addition.

v6: Rebase on top of the new power domain infrastructure. Also pimp the commit
message a bit while at it.

v7: Use IS_BROADWELL instead of IS_GEN8 (Ville).

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> (v1)
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: add Broadwell sprite/plane/cursor checks
Paulo Zanoni [Sun, 3 Nov 2013 04:07:33 +0000 (21:07 -0700)]
drm/i915/bdw: add Broadwell sprite/plane/cursor checks

Just make Broadwell follow the same code paths as Haswell here,
instead of running code for the even-older platforms.

v2: Shuffle around Ben's vma prep work.

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> (v1)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Broadwell has 3 pipes
Damien Lespiau [Sun, 3 Nov 2013 04:07:32 +0000 (21:07 -0700)]
drm/i915/bdw: Broadwell has 3 pipes

v2: Rebase (Paulo Zanoni)

v3: Rebase on top of num_pipes having moved to intel_device_info.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com> (v1)
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> (v2)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: add IS_BROADWELL macro
Paulo Zanoni [Sun, 3 Nov 2013 04:07:31 +0000 (21:07 -0700)]
drm/i915/bdw: add IS_BROADWELL macro

For now it's just equivalent to IS_GEN8, but in the future we might
want to change that (e.g., on Gen 7 we have IS_VALLEYVIEW,
IS_IVYBRIDGE and IS_HASWELL).

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: BSD init for gen8 also
Ben Widawsky [Sun, 3 Nov 2013 04:07:28 +0000 (21:07 -0700)]
drm/i915/bdw: BSD init for gen8 also

This was an oversight and should have been in a previous series
somewhere.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: ppgtt info in debugfs
Ben Widawsky [Sun, 3 Nov 2013 04:07:30 +0000 (21:07 -0700)]
drm/i915/bdw: ppgtt info in debugfs

It's not so much that the information is terribly useful, but rather
that the gen6/7 information is completely useless.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Don't muck with gtt_size on Gen8 when PPGTT setup fails
Ville Syrjälä [Sun, 3 Nov 2013 04:07:29 +0000 (21:07 -0700)]
drm/i915/bdw: Don't muck with gtt_size on Gen8 when PPGTT setup fails

v2: Resolve rebase conflicts and switch to gen < 8 color for GenX
checking.

v3: Rebase on top of the address space refactoring.

Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> (v1)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Render ring flushing
Ben Widawsky [Sun, 3 Nov 2013 04:07:27 +0000 (21:07 -0700)]
drm/i915/bdw: Render ring flushing

PIPE_CONTROL added the high address dword. I'm not sure how the
simulator let me get away with this. I've explicitly left out all the
workarounds from Gen7 because in the minimal digging that I did, most
don't seem necessary, and the simulator doesn't complain without them

Note that BLT and BSD ring commands had already been updated previously.
Just render/pipe_control should have been broken.

v2: Squash in a fixup from Ville to follow the recent IVB PIPE_CONTROL
updates: "BDW uses the IVB PIPE_CONTROL style for specifying GTT vs.
PPGTT for the PIPE_CONTROL QW/DW write."

v3: Rebase on top of Chris' cleanup to have an explicit ring->scratch
buffer object instead of an opaque ring->private where everyone stores
the same stuff inside.

Reported-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net> (for the fixup)
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net> (v1)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: unleash PPGTT
Ben Widawsky [Sun, 3 Nov 2013 04:07:26 +0000 (21:07 -0700)]
drm/i915/bdw: unleash PPGTT

v2: Squash in fix from Ben: Set PPGTT batches as necessary

This fixes the regression in the last couple of days when we enabled
PPGTT.

v3: Squash in fixup to still use GTT for secure batches from Ville:

BDW doesn't have a separate secure vs. non-secure bit in
MI_BATCH_BUFFER_START. So for secure batches we have to simply
leave the PPGTT bit unset. Fortunately older generations (except
HSW) had similar limitations so execbuffer already creates a GTT
mapping for all secure batches.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Implement PPGTT enable
Ben Widawsky [Tue, 5 Nov 2013 06:29:36 +0000 (22:29 -0800)]
drm/i915/bdw: Implement PPGTT enable

Legacy PPGTT on GEN8 requires programming 4 PDP registers per ring.
Since all rings are using the same address space with the current code
the logic is simply to program all the tables we've setup for the PPGTT.

v2: Turn on PPGTT in GFX_MODE

v3: v2 was the wrong patch

v4: Resolve conflicts due to patch series reordering.

v5: Squash in fixup from Ben: Use LRI to write PDPs

The docs (and simulator seems to back up) suggest that we can only
program legacy PPGTT PDPs with LRI commands.

v6: Rebase around context differences conflicts.

v7: Use #defines for per ring PDPs. (Damien)

v8: Don't use typede'f private_t.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net> (up to v3 and v7)
Reviewed-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Implement PPGTT insert
Ben Widawsky [Sun, 3 Nov 2013 04:07:24 +0000 (21:07 -0700)]
drm/i915/bdw: Implement PPGTT insert

GEN8 insertion is very similar to GEN6.

v2: Rebase on top of Imre's for_each_sg_page helpers.

v3: Fixup my conversion (spotted by Ville).

v4: Rebase on top of the address space refactoring.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net> (v1)
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Implement PPGTT clear range
Ben Widawsky [Sun, 3 Nov 2013 04:07:23 +0000 (21:07 -0700)]
drm/i915/bdw: Implement PPGTT clear range

GEN8 PPGTT range clearing is very similar to GEN6 if we assume that our
PDEs are all valid, which they should be.

v2: Rebase on top of the address space refactoring.

v3: Rebase on top of the bool use_scratch addition to the clear_range interface.

Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net> (v1)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Initialize the PDEs
Ben Widawsky [Tue, 5 Nov 2013 05:20:14 +0000 (21:20 -0800)]
drm/i915/bdw: Initialize the PDEs

The upcoming clear and insert routines will expect that PDEs all point
to valid Page Directories. Doing that lazily doesn't really buy us
anything.

The page allocation is done regardless earlier in init so it shouldn't
hurt set the PDEs.

v2: Squash in patches to implement fixed PDE write function:

- If I had done this in the first place, the bug that's going to be
  fixed in an upcoming patch would have been much easier to find.

- Use WB for PDEs.

  The PAT bit is used for page size. 2ME PDEs aren't even supported in
  BDW, so this was completely invalid. The solution is to make our
  PDEs WB+LLC instead of the pervious WB+eLLC. As far as I can guess,
  this change won't matter for performance.

  Thanks to Ville for the quick correction when discussing on IRC.

v3: Return the pde type for pde encoding (Damien)

Reviewed-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: PPGTT init & cleanup
Ben Widawsky [Tue, 5 Nov 2013 04:47:32 +0000 (20:47 -0800)]
drm/i915/bdw: PPGTT init & cleanup

Aside from the potential size increase of the PPGTT, the primary
difference from previous hardware is the Page Directories are no longer
carved out of the Global GTT.

Note that the PDE allocation is done as a 8MB contiguous allocation,
this needs to be eventually fixed (since driver reloading will be a
pain otherwise). Also, this will be a no-go for real PPGTT support.

v2: Move vtable initialization

v3: Resolve conflicts due to patch series reordering.

v4: Rebase on top of the address space refactoring of the PPGTT
support. Drop Imre's r-b tag for v2, too outdated by now.

v5: Free the correct amount of memory, "get_order takes size not a page
count." (Imre)

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Support BDW caching
Ben Widawsky [Tue, 5 Nov 2013 03:56:49 +0000 (19:56 -0800)]
drm/i915/bdw: Support BDW caching

BDW caching works differently than the previous generations. Instead of
having bits in the PTE which directly control how the page is cached,
the 3 PTE bits PWT PCD and PAT provide an index into a PAT defined by
register 0x40e0. This style of caching is functionally equivalent to how
it works on HSW and before.

v2: Tiny bikeshed as discussed on internal irc.

v3: Squash in patch from Ville to mirror the x86 PAT setup more like
in arch/x86/mm/pat.c. Primarily, the 0th index will be WB, and not
uncached.

v4: Comment for reason to not use a 64b write on the PPAT.

v5: Add a FIXME comment that the caching bits in the PAT registers
might be wrong due to doc confusion.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net> (v1)
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Add GTT functions
Ben Widawsky [Sun, 3 Nov 2013 04:07:18 +0000 (21:07 -0700)]
drm/i915/bdw: Add GTT functions

With the PTE clarifications, the bind and clear functions can now be
added for gen8.

v2: Use for_each_sg_pages in gen8_ggtt_insert_entries.

v3: Drop dev argument to pte encode functions, upstream lost it. Also
rebase on top of the scratch page movement.

v4: Rebase on top of the new address space vfuncs.

v5: Add the bool use_scratch argument to clear_range and the bool valid argument
to the PTE encode function to follow upstream changes.

v6: Add a FIXME(BDW) about the size mismatch of the readback check
that Jon Bloomfield spotted.

v7: Squash in fixup patch from Ben for the posting read to match the
64bit ptes and so shut up the WARN.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net> (v1)
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Create gen8_gtt_pte_t
Ben Widawsky [Sun, 3 Nov 2013 04:07:17 +0000 (21:07 -0700)]
drm/i915/bdw: Create gen8_gtt_pte_t

With gen6 PTE type in place, pave the way for the new gen8 type.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Make gen8_gmch_probe
Ben Widawsky [Tue, 5 Nov 2013 03:32:22 +0000 (19:32 -0800)]
drm/i915/bdw: Make gen8_gmch_probe

Probing gen8 is similar to gen6. To make the code cleaner and more
maintainable however we can use the probe functions to split it out.

v2: Rebased on top of update gtt probe infrastructure.

v3: Rebased on top of Kenneth' Graunke's ->pte_encode refactoring.

V4: Resolve conflicts with Ben's latest ppgtt patches, also switch to
gen < 8 testing instead of gen <= 7.

v5: Resolve conflicts with address space vfunc changes in upstream.

v6: Use 39b DMA mask. At least, for this mode, it is the correct mask.
(Imre)

Cc: Imre Deak <imre.deak@intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Update relevant error state
Ben Widawsky [Sun, 3 Nov 2013 04:07:15 +0000 (21:07 -0700)]
drm/i915/bdw: Update relevant error state

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: debugfs updates
Ben Widawsky [Sun, 3 Nov 2013 04:07:14 +0000 (21:07 -0700)]
drm/i915/bdw: debugfs updates

All the gen8 debugfs stuff I wasn't too lazy to update. We'll need more
later, I am certain.

v2: Fix up the register name in the debugfs output as suggested by
Paulo.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net> (v1)
Reviewed-by: Paulo Zanoni <przanoni@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Update MI_FLUSH_DW
Ben Widawsky [Sun, 3 Nov 2013 04:07:13 +0000 (21:07 -0700)]
drm/i915/bdw: Update MI_FLUSH_DW

The code is more verbose than necessary for the reader's sake, hopefully
the compiler optimizes away the if.

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: dispatch updates (64b related)
Ben Widawsky [Sun, 3 Nov 2013 04:07:12 +0000 (21:07 -0700)]
drm/i915/bdw: dispatch updates (64b related)

The command to emit batch buffers has changed to address 48b addresses.
It seemed reasonable that we could still use the old instruction where
emitting 0 for length would do the right thing, but it seems to bother
the simulator when the code does that.

Now the second dword in the command has the upper 16b of the address of
the batchbuffer.

v2: Remove duplicated vfun assignment.

v3: Squash in VECS support changes from Zhao Yakui <yakui.zhao@intel.com>

v4: Make checkpatch happy.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net> (v2)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Support 64b relocations
Ben Widawsky [Sun, 3 Nov 2013 04:07:11 +0000 (21:07 -0700)]
drm/i915/bdw: Support 64b relocations

We don't actually return any to userspace yet, however we can pretend
like we do now so userspace will support it when it happens.

This is just to please Chris as the code itself isn't ready for > 64b
relocations.

v2: Rebase on top of the refactored relocate_entry_gtt|cpu functions.

v3: Squash in fixup from Rafal Barbalho for 64 byte relocs using cpu
relocs and those crossing a page boundary.

v4: Squash in a fixup for the fixup from Rafael.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net> (v1)
Signed-off-by: Barbalho, Rafael <rafael.barbalho@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Add interrupt info to debugfs
Ben Widawsky [Sun, 3 Nov 2013 04:07:10 +0000 (21:07 -0700)]
drm/i915/bdw: Add interrupt info to debugfs

v2: Add missed ring interrupt info

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Implement interrupt changes
Ben Widawsky [Sun, 3 Nov 2013 04:07:09 +0000 (21:07 -0700)]
drm/i915/bdw: Implement interrupt changes

The interrupt handling implementation remains the same as previous
generations with the 4 types of registers, status, identity, mask, and
enable. However the layout of where the bits go have changed entirely.
To address these changes, all of the interrupt vfuncs needed special
gen8 code.

The way it works is there is a top level status register now which
informs the interrupt service routine which unit caused the interrupt,
and therefore which interrupt registers to read to process the
interrupt. For display the division is quite logical, a set of interrupt
registers for each pipe, and in addition to those, a set each for "misc"
and port.

For GT the things get a bit hairy, as seen by the code. Each of the GT
units has it's own bits defined. They all look *very similar* and
resides in 16 bits of a GT register. As an example, RCS and BCS share
register 0. To compact the code a bit, at a slight expense to
complexity, this is exactly how the code works as well. 2 structures are
added to the ring buffer so that our ring buffer interrupt handling code
knows which ring shares the interrupt registers, and a shift value (ie.
the top or bottom 16 bits of the register).

The above allows us to kept the interrupt register caching scheme, the
per interrupt enables, and the code to mask and unmask interrupts
relatively clean (again at the cost of some more complexity).

Most of the GT units mentioned above are command streamers, and so the
symmetry should work quite well for even the yet to be implemented rings
which Broadwell adds.

v2: Fixes up a couple of bugs, and is more verbose about errors in the
Broadwell interrupt handler.

v3: fix DE_MISC IER offset

v4: Simplify interrupts:
I totally misread the docs the first time I implemented interrupts, and
so this should greatly simplify the mess. Unlike GEN6, we never touch
the regular mask registers in irq_get/put.

v5: Rebased on to of recent pch hotplug setup changes.

v6: Fixup on top of moving num_pipes to intel_info.

v7: Rebased on top of Egbert Eich's hpd irq handling rework. Also
wired up ibx_hpd_irq_setup for gen8.

v8: Rebase on top of Jani's asle handling rework.

v9: Rebase on top of Ben's VECS enabling for Haswell, where he
unfortunately went OCD on the gt irq #defines. Not that they're still
not yet fully consistent:
- Used the GT_RENDER_ #defines + bdw shifts.
- Dropped the shift from the L3_PARITY stuff, seemed clearer.
- s/irq_refcount/irq_refcount.gt/

v10: Squash in VECS enabling patches and the gen8_gt_irq_handler
refactoring from Zhao Yakui <yakui.zhao@intel.com>

v11: Rebase on top of the interrupt cleanups in upstream.

v12: Rebase on top of Ben's DPF changes in upstream.

v13: Drop bdw from the HAS_L3_DPF feature flag for now, it's unclear what
exactly needs to be done. Requested by Ben.

v14: Fix the patch.
- Drop the mask of reserved bits and assorted logic, it doesn't match
  the spec.
- Do the posting read inconditionally instead of commenting it out.
- Add a GEN8_MASTER_IRQ_CONTROL definition and use it.
- Fix up the GEN8_PIPE interrupt defines and give the GEN8_ prefixes -
  we actually will need to use them.
- Enclose macros in do {} while (0) (checkpatch).
- Clear DE_MISC interrupt bits only after having processed them.
- Fix whitespace fail (checkpatch).
- Fix overtly long lines where appropriate (checkpatch).
- Don't use typedef'ed private_t (maintainer-scripts).
- Align the function parameter list correctly.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net> (v4)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
bikeshed

11 years agodrm/i915/bdw: support GMS and GGMS changes
Ben Widawsky [Mon, 4 Nov 2013 00:53:55 +0000 (16:53 -0800)]
drm/i915/bdw: support GMS and GGMS changes

All the BARs have the ability to grow.

v2: Pulled out the simulator workaround to a separate patch.
Rebased.

v3: Rebase onto latest vlv patches from Jesse.

v4: Rebased on top of the early stolen quirk patch from Jesse.

v5: Use the new macro names.
s/INTEL_BDW_PCI_IDS_D/INTEL_BDW_D_IDS
s/INTEL_BDW_PCI_IDS_M/INTEL_BDW_M_IDS
It's Jesse's fault for not following the convention I originally set.

Cc: Ingo Molnar <mingo@kernel.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: display stuff
Ben Widawsky [Sun, 3 Nov 2013 04:07:07 +0000 (21:07 -0700)]
drm/i915/bdw: display stuff

Just enough to make the code not barf...

Init BDW display to look like HSW. For the simulator this should be
fine, but this will probably require more work.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
[danvet: Add a FIXME comment about RCS flips being untested on bdw.
Also add a note that hblank events are reserved on bdw+ in DERRMR.]
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Clock gating init
Ben Widawsky [Sun, 3 Nov 2013 04:07:06 +0000 (21:07 -0700)]
drm/i915/bdw: Clock gating init

Clock gating init is really a catch all function for registers we need
to write early in loading the driver.

Atm just the bare metal stuff we need, more will surely come.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: HW context support
Ben Widawsky [Sun, 3 Nov 2013 04:07:05 +0000 (21:07 -0700)]
drm/i915/bdw: HW context support

BDW context sizes varies a bit.

v2: Squash in fixup for the hw context size from Ben.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net> (v1)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Swizzling support
Ben Widawsky [Sun, 3 Nov 2013 04:07:04 +0000 (21:07 -0700)]
drm/i915/bdw: Swizzling support

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Fences on gen8 look just like gen7
Ben Widawsky [Sun, 3 Nov 2013 04:07:03 +0000 (21:07 -0700)]
drm/i915/bdw: Fences on gen8 look just like gen7

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Add device IDs
Ben Widawsky [Mon, 4 Nov 2013 00:47:33 +0000 (16:47 -0800)]
drm/i915/bdw: Add device IDs

v2: Squash in "drm/i915/bdw: Add BDW to the HAS_DDI check" as
suggested by Damien.

v3: Squash in VEBOX enabling from  Zhao Yakui <yakui.zhao@intel.com>

v4: Rebase on top of Jesse's patch to extract all pci ids to
include/drm/i915_pciids.h.

v4: Replace Halo by its marketing moniker Iris. Requested by Ben.

v5: Switch from info->has*ring to info->ring_mask.

v6: Add 0x16X2 variant (which is newer than this patch)
Rename to use new naming scheme (Chris)
Remove Simulator PCI ids. These snuck in during rebase (Chris)

v7: Fix poor sed job from v6
Make the desktop variants use the desktop macro (Rebase error). Notice
that this makes no functional difference - it's just confusing.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Disable PPGTT for now
Daniel Vetter [Sun, 3 Nov 2013 04:07:01 +0000 (21:07 -0700)]
drm/i915/bdw: Disable PPGTT for now

This will be changed once the gen8 code is fully implemented.

v2: Use ENOSYS instead of ENXIO as suggested by Chris.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Initialize BDW forcewake vfuncs
Ben Widawsky [Fri, 8 Nov 2013 00:24:31 +0000 (16:24 -0800)]
drm/i915/bdw: Initialize BDW forcewake vfuncs

Somehow this got missed or dropped during development. The simulator
does not use forcewake, so it's entirely possible it never worked
correctly. After the mmio rework, this will end up in an OOPs, and the
system will not boot.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
[danvet: Use IS_GEN8 instead of IS_BROADWELL.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: Handle forcewake for writes on gen8
Ben Widawsky [Sun, 3 Nov 2013 04:07:00 +0000 (21:07 -0700)]
drm/i915/bdw: Handle forcewake for writes on gen8

GEN8 removes the GT FIFO which we've all come to know and love. Instead
it offers a wider range of optimized registers which always keep a
shadowed copy, and are fed to the GPU when it wakes.

How this is implemented in hardware is still somewhat of a mystery. As
far as I can tell, the basic design is as follows:

If the register is not optimized, you must use the old forcewake
mechanism to bring the GT out of sleep. [1]

If register is in the optimized list the write will signal that the
GT should begin to come out of whatever sleep state it is in.

While the GT is coming out of sleep, the requested write will be stored
in an intermediate shadow register.

Do to the fact that the implementation details are not clear, I see
several risks:
1. Order is not preserved as it is with GT FIFO. If we issue multiple
writes to optimized registers, where order matters, we may need to
serialize it with forcewake.
2. The optimized registers have only 1 shadowed slot, meaning if we
issue multiple writes to the same register, and those values need to
reach the GPU in order, forcewake will be required.

[1] We could implement a SW queue the way the GT FIFO used to work if
desired.

NOTE: Compile tested only until we get real silicon.

v2:
- Use a default case to make future platforms also work.
- Get rid of IS_BROADWELL since that's not yet defined, but we want to
  MMIO as soon as possible.

v3: Apply suggestions from Mika's review:
- s/optimized/shadowed/
- invert the logic of the helper so that it does what it says (the
  code itself was correct, just confusing to read).

v4:
- Squash in lost break.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net> (v1)
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915/bdw: IS_GEN8 definition
Ben Widawsky [Sun, 3 Nov 2013 04:06:59 +0000 (21:06 -0700)]
drm/i915/bdw: IS_GEN8 definition

No PCI ids yet, so nothing should happen.

Rebase-Note: This one needs replacement ;-)

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agoMerge tag 'v3.12' into drm-intel-next
Daniel Vetter [Mon, 4 Nov 2013 15:28:47 +0000 (16:28 +0100)]
Merge tag 'v3.12' into drm-intel-next

I want to merge in the new Broadwell support as a late hw enabling
pull request. But since the internal branch was based upon our
drm-intel-nightly integration branch I need to resolve all the
oustanding conflicts in drm/i915 with a backmerge to make the 60+
patches apply properly.

We'll propably have some fun because Linus will come up with a
slightly different merge solution.

Conflicts:
drivers/gpu/drm/i915/i915_dma.c
drivers/gpu/drm/i915/i915_drv.c
drivers/gpu/drm/i915/intel_crt.c
drivers/gpu/drm/i915/intel_ddi.c
drivers/gpu/drm/i915/intel_display.c
drivers/gpu/drm/i915/intel_dp.c
drivers/gpu/drm/i915/intel_drv.h

All rather simple adjacent lines changed or partial backports from
-next to -fixes, with the exception of the thaw code in i915_dma.c.
That one needed a bit of shuffling to restore the intent.

Oh and the massive header file reordering in intel_drv.h is a bit
trouble. But not much.

v2: Also don't forget the fixup for the silent conflict that results
in compile fail ...

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agoLinux 3.12
Linus Torvalds [Sun, 3 Nov 2013 23:41:51 +0000 (15:41 -0800)]
Linux 3.12

11 years agoMerge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Linus Torvalds [Sun, 3 Nov 2013 19:36:41 +0000 (11:36 -0800)]
Merge branch 'upstream' of git://git.linux-mips.org/ralf/upstream-linus

Pull MIPS fixes from Ralf Baechle:
 "Three fixes across arch/mips with the most complex one being the GIC
  interrupt fix - at nine lines still not monster.  I'm confident this
  are the final MIPS patches even if there should go for an rc8"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
  MIPS: ralink: fix return value check in rt_timer_probe()
  MIPS: malta: Fix GIC interrupt offsets
  MIPS: Perf: Fix 74K cache map

11 years agoipc, msg: forbid negative values for "msg{max,mnb,mni}"
Mathias Krause [Sun, 3 Nov 2013 11:36:28 +0000 (12:36 +0100)]
ipc, msg: forbid negative values for "msg{max,mnb,mni}"

Negative message lengths make no sense -- so don't do negative queue
lenghts or identifier counts. Prevent them from getting negative.

Also change the underlying data types to be unsigned to avoid hairy
surprises with sign extensions in cases where those variables get
evaluated in unsigned expressions with bigger data types, e.g size_t.

In case a user still wants to have "unlimited" sizes she could just use
INT_MAX instead.

Signed-off-by: Mathias Krause <minipli@googlemail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoMerge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty...
Linus Torvalds [Sat, 2 Nov 2013 17:27:29 +0000 (10:27 -0700)]
Merge tag 'fixes-for-linus' of git://git./linux/kernel/git/rusty/linux

Pull ARM kallsyms fix from Rusty Russell:
 "Last minute perf unbreakage for ARM modules; spent a day in
  linux-next"

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux:
  scripts/kallsyms: filter symbols not in kernel address space

11 years agoARC: Incorrect mm reference used in vmalloc fault handler
Vineet Gupta [Sat, 2 Nov 2013 12:17:49 +0000 (17:47 +0530)]
ARC: Incorrect mm reference used in vmalloc fault handler

A vmalloc fault needs to sync up PGD/PTE entry from init_mm to current
task's "active_mm".  ARC vmalloc fault handler however was using mm.

A vmalloc fault for non user task context (actually pre-userland, from
init thread's open for /dev/console) caused the handler to deref NULL mm
(for mm->pgd)

The reasons it worked so far is amazing:

1. By default (!SMP), vmalloc fault handler uses a cached value of PGD.
   In SMP that MMU register is repurposed hence need for mm pointer deref.

2. In pre-3.12 SMP kernel, the problem triggering vmalloc didn't exist in
   pre-userland code path - it was introduced with commit 20bafb3d23d108bc
   "n_tty: Move buffers into n_tty_data"

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Gilad Ben-Yossef <gilad@benyossef.com>
Cc: Noam Camus <noamc@ezchip.com>
Cc: stable@vger.kernel.org #3.10 and 3.11
Cc: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoscripts/kallsyms: filter symbols not in kernel address space
Ming Lei [Fri, 1 Nov 2013 22:41:33 +0000 (09:11 +1030)]
scripts/kallsyms: filter symbols not in kernel address space

This patch uses CONFIG_PAGE_OFFSET to filter symbols which
are not in kernel address space because these symbols are
generally for generating code purpose and can't be run at
kernel mode, so we needn't keep them in /proc/kallsyms.

For example, on ARM there are some symbols which may be
linked in relocatable code section, then perf can't parse
symbols any more from /proc/kallsyms, this patch fixes the
problem (introduced b9b32bf70f2fb710b07c94e13afbc729afe221da)

Cc: Russell King <linux@arm.linux.org.uk>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Michal Marek <mmarek@suse.cz>
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: stable@vger.kernel.org
11 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 1 Nov 2013 19:54:51 +0000 (12:54 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull perf fixes from Ingo Molnar:
 "Two fixes:

   - Fix 'NMI handler took too long to run' false positives

     [ Genuine NMI overhead speedups will come for v3.13, this commit
       only fixes a measurement bug ]

   - Fix perf ring-buffer missed barrier causing (rare) ring-buffer data
     corruption on ppc64"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86: Fix NMI measurements
  perf: Fix perf ring buffer memory ordering

11 years agoMerge tag 'usb-3.12-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Linus Torvalds [Fri, 1 Nov 2013 19:23:56 +0000 (12:23 -0700)]
Merge tag 'usb-3.12-rc8' of git://git./linux/kernel/git/gregkh/usb

Pull USB fixes from Greg KH:
 "Here is a set of patches that revert all of the changes done to the
  pl2303 USB serial driver in the 3.12-rc timeframe, as it turns out
  they break some devices that work just fine on 3.11.  As it's not a
  good idea to break working systems, drop them all and they will be
  reworked for future kernel versions such that there is no breakage.

  I've also included a MAINTAINERS update for the USB serial subsystem
  and a new device id for the ftdi_sio driver as well"

* tag 'usb-3.12-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  USB: serial: ftdi_sio: add id for Z3X Box device
  USB: Maintainers change for usb serial drivers
  Revert "USB: pl2303: restrict the divisor based baud rate encoding method to the "HX" chip type"
  Revert "usb: pl2303: fix+improve the divsor based baud rate encoding method"
  Revert "usb: pl2303: do not round to the next nearest standard baud rate for the divisor based baud rate encoding method"
  Revert "usb: pl2303: remove 500000 baud from the list of standard baud rates"
  Revert "usb: pl2303: move the two baud rate encoding methods to separate functions"
  Revert "usb: pl2303: increase the allowed baud rate range for the divisor based encoding method"
  Revert "usb: pl2303: also use the divisor based baud rate encoding method for baud rates < 115200 with HX chips"
  Revert "usb: pl2303: add two comments concerning the supported baud rates with HX chips"
  Revert "pl2303: simplify the else-if contruct for type_1 chips in pl2303_startup()"
  Revert "pl2303: improve the chip type information output on startup"
  Revert "pl2303: improve the chip type detection/distinction"
  Revert "USB: pl2303: distinguish between original and cloned HX chips"

11 years agoMerge tag 'sound-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Linus Torvalds [Fri, 1 Nov 2013 19:23:22 +0000 (12:23 -0700)]
Merge tag 'sound-3.12' of git://git./linux/kernel/git/tiwai/sound

Pull more sound fixes from Takashi Iwai:
 "The fixes for random bugs that have been reported lately in the game:
  a few fixes in ASoC dpam and wm_hubs bugs spotted by Coverity, a
  one-liner HD-audio fixup, and a fix for Oops with DPCM.

  They are not so critically urgent bugs, but all small and safe"

* tag 'sound-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: fix oops in snd_pcm_info() caused by ASoC DPCM
  ASoC: wm_hubs: Add missing break in hp_supply_event()
  ALSA: hda - Add a fixup for ASUS N76VZ
  ASoC: dapm: Return -ENOMEM in snd_soc_dapm_new_dai_widgets()
  ASoC: dapm: Fix source list debugfs outputs

11 years agoMerge tag 'clk-fixes-for-linus' of git://git.linaro.org/people/mturquette/linux
Linus Torvalds [Fri, 1 Nov 2013 19:22:47 +0000 (12:22 -0700)]
Merge tag 'clk-fixes-for-linus' of git://git.linaro.org/people/mturquette/linux

Pull clock subsystem fixes from Mike Turquette.

* tag 'clk-fixes-for-linus' of git://git.linaro.org/people/mturquette/linux:
  clk: fixup argument order when setting VCO parameters
  clk: socfpga: Fix incorrect sdmmc clock name
  clk: armada-370: fix tclk frequencies
  clk: nomadik: set all timers to use 2.4 MHz TIMCLK

11 years agomemcg: remove incorrect underflow check
Greg Thelen [Fri, 1 Nov 2013 19:16:59 +0000 (12:16 -0700)]
memcg: remove incorrect underflow check

When a memcg is deleted mem_cgroup_reparent_charges() moves charged
memory to the parent memcg.  As of v3.11-9444-g3ea67d0 "memcg: add per
cgroup writeback pages accounting" there's bad pointer read.  The goal
was to check for counter underflow.  The counter is a per cpu counter
and there are two problems with the code:

 (1) per cpu access function isn't used, instead a naked pointer is used
     which easily causes oops.
 (2) the check doesn't sum all cpus

Test:
  $ cd /sys/fs/cgroup/memory
  $ mkdir x
  $ echo 3 > /proc/sys/vm/drop_caches
  $ (echo $BASHPID >> x/tasks && exec cat) &
  [1] 7154
  $ grep ^mapped x/memory.stat
  mapped_file 53248
  $ echo 7154 > tasks
  $ rmdir x
  <OOPS>

The fix is to remove the check.  It's currently dangerous and isn't
worth fixing it to use something expensive, such as
percpu_counter_sum(), for each reparented page.  __this_cpu_read() isn't
enough to fix this because there's no guarantees of the current cpus
count.  The only guarantees is that the sum of all per-cpu counter is >=
nr_pages.

Fixes: 3ea67d06e467 ("memcg: add per cgroup writeback pages accounting")
Reported-and-tested-by: Flavio Leitner <fbl@redhat.com>
Signed-off-by: Greg Thelen <gthelen@google.com>
Reviewed-by: Sha Zhengju <handai.szj@taobao.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agodrm/i915: avoid unclaimed registers when capturing the error state
Paulo Zanoni [Fri, 1 Nov 2013 15:32:08 +0000 (13:32 -0200)]
drm/i915: avoid unclaimed registers when capturing the error state

Even though we only check for unclaimed registers while we're writing
registers, if we read a bad register we'll still trigger a CPU error
interrupt, and we'll print an "Unclaimed register" DRM_ERROR due to
that. To avoid this error, just avoid touching power domains that are
not enabled.

Use kzalloc so we're sure all the disabled domains will be zeroed on
the error state file. We already print the information that is enough
to discover if the power well is enabled on the error state file, so
this should not be a problem.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=69747
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: Enable DP port CRC for the "auto" source on g4x/vlv
Daniel Vetter [Fri, 1 Nov 2013 09:50:23 +0000 (10:50 +0100)]
drm/i915: Enable DP port CRC for the "auto" source on g4x/vlv

Now that DP port CRCs are stable, we can use it for generic CRC tests.
Yay, the auto CRC source should now work everywhere!

Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: scramble reset support for DP port CRC on vlv
Daniel Vetter [Fri, 1 Nov 2013 09:50:22 +0000 (10:50 +0100)]
drm/i915: scramble reset support for DP port CRC on vlv

They've moved the DC balance reset bit around. Again I don't think we
need it, but better safe than sorry and maybe HDMI port CRC will prove
useful for checking infoframes or hdmi audio.

v2: Apply the suggestions from Damien's review.

Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i915: scramble reset support for DP port CRC on g4x
Daniel Vetter [Fri, 1 Nov 2013 09:50:21 +0000 (10:50 +0100)]
drm/i915: scramble reset support for DP port CRC on g4x

We need to reset the DP scrambler on every vsync to get stable CRCs.
And since we can't use the normal pipe CRC on DP ports on g4x we
really need them to be able to test modesetting issues on (e)DP
outputs.

Note that the DC balance reset is for SDVO port CRCs so we don't
strictly need it. But better safe than sorry (and it's a nice template
in case we ever want to grab port CRCs for e.g. audio checking).

v2: Apply the suggestions from Damien's review.

Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agodrm/i916: add "auto" pipe CRC source
Daniel Vetter [Fri, 1 Nov 2013 09:50:20 +0000 (10:50 +0100)]
drm/i916: add "auto" pipe CRC source

On gmch platforms the normal pipe source CRC registers don't work for
DP and TV encoders. And on newer platforms the single pipe CRC has
been replaced by a set of CRC at different stages in the platform.

Now most of our userspace tests don't care one bit about the exact
CRC, they simply want something that reflects any changes on the
screen. Hence add a new auto target for platform agnostic tests to
use.

v2: Pass back the adjusted source so that it can be shown in debugfs.

v3: I seem to be unable to get a stable CRC for DP ports. So let's
just disable them for now when using the auto mode. Note that
testcases need to be restructured so that they can dynamically skip
connectors. They also first need to set up the desired mode
configuration, since otherwise the auto mode won't do the right thing.

v4: Don't leak the modeset mutex on error paths.

v5: Spelling fix for the i9xx auto_source function.

Cc: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
11 years agoUSB: serial: ftdi_sio: add id for Z3X Box device
Алексей Крамаренко [Fri, 1 Nov 2013 13:26:38 +0000 (17:26 +0400)]
USB: serial: ftdi_sio: add id for Z3X Box device

Custom VID/PID for Z3X Box device, popular tool for cellphone flashing.

Signed-off-by: Alexey E. Kramarenko <alexeyk13@yandex.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoUSB: Maintainers change for usb serial drivers
Greg KH [Wed, 30 Oct 2013 18:07:31 +0000 (11:07 -0700)]
USB: Maintainers change for usb serial drivers

Johan has been conned^Wgracious in accepting the maintainership of the
USB serial drivers, especially as he's been doing all of the real work
for the past few years.

At the same time, remove a bunch of old entries for USB serial drivers
that don't make sense anymore, given that the developers are no longer
around, and individual driver maintainerships for tiny things like this
is pretty pointless.

Acked-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoRevert "USB: pl2303: restrict the divisor based baud rate encoding method to the...
Greg Kroah-Hartman [Fri, 1 Nov 2013 16:19:56 +0000 (09:19 -0700)]
Revert "USB: pl2303: restrict the divisor based baud rate encoding method to the "HX" chip type"

This reverts commit b8bdad608213caffa081a97d2e937e5fe08c4046.

Revert all of the pl2303 changes that went into 3.12-rc1 and -rc2 as
they cause regressions on some versions of the chip.  This will all be
revisited for later kernel versions when we can figure out how to handle
this in a way that does not break working devices.

Reported-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Frank Schäfer <fschaefer.oss@googlemail.com>
Acked-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoRevert "usb: pl2303: fix+improve the divsor based baud rate encoding method"
Greg Kroah-Hartman [Fri, 1 Nov 2013 16:19:45 +0000 (09:19 -0700)]
Revert "usb: pl2303: fix+improve the divsor based baud rate encoding method"

This reverts commit 57ce61aad748ceaa08c859da04043ad7dae7c15e.

Revert all of the pl2303 changes that went into 3.12-rc1 and -rc2 as
they cause regressions on some versions of the chip.  This will all be
revisited for later kernel versions when we can figure out how to handle
this in a way that does not break working devices.

Reported-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Frank Schäfer <fschaefer.oss@googlemail.com>
Acked-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoRevert "usb: pl2303: do not round to the next nearest standard baud rate for the...
Greg Kroah-Hartman [Fri, 1 Nov 2013 16:19:34 +0000 (09:19 -0700)]
Revert "usb: pl2303: do not round to the next nearest standard baud rate for the divisor based baud rate encoding method"

This reverts commit 75417d9f99f89ab241de69d7db15af5842b488c4.

Revert all of the pl2303 changes that went into 3.12-rc1 and -rc2 as
they cause regressions on some versions of the chip.  This will all be
revisited for later kernel versions when we can figure out how to handle
this in a way that does not break working devices.

Reported-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Frank Schäfer <fschaefer.oss@googlemail.com>
Acked-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoRevert "usb: pl2303: remove 500000 baud from the list of standard baud rates"
Greg Kroah-Hartman [Fri, 1 Nov 2013 16:19:24 +0000 (09:19 -0700)]
Revert "usb: pl2303: remove 500000 baud from the list of standard baud rates"

This reverts commit b9208c721ce736125fe58d398319513a27850fd8.

Revert all of the pl2303 changes that went into 3.12-rc1 and -rc2 as
they cause regressions on some versions of the chip.  This will all be
revisited for later kernel versions when we can figure out how to handle
this in a way that does not break working devices.

Reported-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Frank Schäfer <fschaefer.oss@googlemail.com>
Acked-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoRevert "usb: pl2303: move the two baud rate encoding methods to separate functions"
Greg Kroah-Hartman [Fri, 1 Nov 2013 16:19:03 +0000 (09:19 -0700)]
Revert "usb: pl2303: move the two baud rate encoding methods to separate functions"

This reverts commit e917ba01d69ad705a4cd6a6c77538f55d84f5907.

Revert all of the pl2303 changes that went into 3.12-rc1 and -rc2 as
they cause regressions on some versions of the chip.  This will all be
revisited for later kernel versions when we can figure out how to handle
this in a way that does not break working devices.

Reported-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Frank Schäfer <fschaefer.oss@googlemail.com>
Acked-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoRevert "usb: pl2303: increase the allowed baud rate range for the divisor based encod...
Greg Kroah-Hartman [Fri, 1 Nov 2013 16:18:47 +0000 (09:18 -0700)]
Revert "usb: pl2303: increase the allowed baud rate range for the divisor based encoding method"

This reverts commit b5c16c6a031c52cc4b7dda6c3de46462fbc92eab.

Revert all of the pl2303 changes that went into 3.12-rc1 and -rc2 as
they cause regressions on some versions of the chip.  This will all be
revisited for later kernel versions when we can figure out how to handle
this in a way that does not break working devices.

Reported-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Frank Schäfer <fschaefer.oss@googlemail.com>
Acked-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoRevert "usb: pl2303: also use the divisor based baud rate encoding method for baud...
Greg Kroah-Hartman [Fri, 1 Nov 2013 16:18:38 +0000 (09:18 -0700)]
Revert "usb: pl2303: also use the divisor based baud rate encoding method for baud rates < 115200 with HX chips"

This reverts commit 61fa8d694b8547894b57ea0d99d0120a58f6ebf8.

Revert all of the pl2303 changes that went into 3.12-rc1 and -rc2 as
they cause regressions on some versions of the chip.  This will all be
revisited for later kernel versions when we can figure out how to handle
this in a way that does not break working devices.

Reported-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Frank Schäfer <fschaefer.oss@googlemail.com>
Acked-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoRevert "usb: pl2303: add two comments concerning the supported baud rates with HX...
Greg Kroah-Hartman [Fri, 1 Nov 2013 16:18:25 +0000 (09:18 -0700)]
Revert "usb: pl2303: add two comments concerning the supported baud rates with HX chips"

This reverts commit c23bda365dfbf56aa4d6d4a97f83136c36050e01.

Revert all of the pl2303 changes that went into 3.12-rc1 and -rc2 as
they cause regressions on some versions of the chip.  This will all be
revisited for later kernel versions when we can figure out how to handle
this in a way that does not break working devices.

Reported-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Frank Schäfer <fschaefer.oss@googlemail.com>
Acked-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoRevert "pl2303: simplify the else-if contruct for type_1 chips in pl2303_startup()"
Greg Kroah-Hartman [Fri, 1 Nov 2013 16:18:10 +0000 (09:18 -0700)]
Revert "pl2303: simplify the else-if contruct for type_1 chips in pl2303_startup()"

This reverts commit 73b583af597542329e6adae44524da6f27afed62.

Revert all of the pl2303 changes that went into 3.12-rc1 and -rc2 as
they cause regressions on some versions of the chip.  This will all be
revisited for later kernel versions when we can figure out how to handle
this in a way that does not break working devices.

Reported-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Frank Schäfer <fschaefer.oss@googlemail.com>
Acked-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoRevert "pl2303: improve the chip type information output on startup"
Greg Kroah-Hartman [Fri, 1 Nov 2013 16:17:50 +0000 (09:17 -0700)]
Revert "pl2303: improve the chip type information output on startup"

This reverts commit a77a8c23e4db9fb1f776147eda0d85117359c700.

Revert all of the pl2303 changes that went into 3.12-rc1 and -rc2 as
they cause regressions on some versions of the chip.  This will all be
revisited for later kernel versions when we can figure out how to handle
this in a way that does not break working devices.

Reported-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Frank Schäfer <fschaefer.oss@googlemail.com>
Acked-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoRevert "pl2303: improve the chip type detection/distinction"
Greg Kroah-Hartman [Fri, 1 Nov 2013 16:16:09 +0000 (09:16 -0700)]
Revert "pl2303: improve the chip type detection/distinction"

This reverts commit 034d1527adebd302115c87ef343497a889638275.

Revert all of the pl2303 changes that went into 3.12-rc1 and -rc2 as
they cause regressions on some versions of the chip.  This will all be
revisited for later kernel versions when we can figure out how to handle
this in a way that does not break working devices.

Reported-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Frank Schäfer <fschaefer.oss@googlemail.com>
Acked-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoRevert "USB: pl2303: distinguish between original and cloned HX chips"
Greg Kroah-Hartman [Fri, 1 Nov 2013 16:12:52 +0000 (09:12 -0700)]
Revert "USB: pl2303: distinguish between original and cloned HX chips"

This reverts commit 7d26a78f62ff4fb08bc5ba740a8af4aa7ac67da4.

Revert all of the pl2303 changes that went into 3.12-rc1 and -rc2 as
they cause regressions on some versions of the chip.  This will all be
revisited for later kernel versions when we can figure out how to handle
this in a way that does not break working devices.

Reported-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Frank Schäfer <fschaefer.oss@googlemail.com>
Acked-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoMerge branch 'akpm' (fixes from Andrew Morton)
Linus Torvalds [Thu, 31 Oct 2013 23:58:23 +0000 (16:58 -0700)]
Merge branch 'akpm' (fixes from Andrew Morton)

Merge four more fixes from Andrew Morton.

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  lib/scatterlist.c: don't flush_kernel_dcache_page on slab page
  mm: memcg: fix test for child groups
  mm: memcg: lockdep annotation for memcg OOM lock
  mm: memcg: use proper memcg in limit bypass

11 years agolib/scatterlist.c: don't flush_kernel_dcache_page on slab page
Ming Lei [Thu, 31 Oct 2013 23:34:17 +0000 (16:34 -0700)]
lib/scatterlist.c: don't flush_kernel_dcache_page on slab page

Commit b1adaf65ba03 ("[SCSI] block: add sg buffer copy helper
functions") introduces two sg buffer copy helpers, and calls
flush_kernel_dcache_page() on pages in SG list after these pages are
written to.

Unfortunately, the commit may introduce a potential bug:

 - Before sending some SCSI commands, kmalloc() buffer may be passed to
   block layper, so flush_kernel_dcache_page() can see a slab page
   finally

 - According to cachetlb.txt, flush_kernel_dcache_page() is only called
   on "a user page", which surely can't be a slab page.

 - ARCH's implementation of flush_kernel_dcache_page() may use page
   mapping information to do optimization so page_mapping() will see the
   slab page, then VM_BUG_ON() is triggered.

Aaro Koskinen reported the bug on ARM/kirkwood when DEBUG_VM is enabled,
and this patch fixes the bug by adding test of '!PageSlab(miter->page)'
before calling flush_kernel_dcache_page().

Signed-off-by: Ming Lei <ming.lei@canonical.com>
Reported-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Tested-by: Simon Baatz <gmbnomis@gmail.com>
Cc: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Tejun Heo <tj@kernel.org>
Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: <stable@vger.kernel.org> [3.2+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agomm: memcg: fix test for child groups
Johannes Weiner [Thu, 31 Oct 2013 23:34:15 +0000 (16:34 -0700)]
mm: memcg: fix test for child groups

When memcg code needs to know whether any given memcg has children, it
uses the cgroup child iteration primitives and returns true/false
depending on whether the iteration loop is executed at least once or
not.

Because a cgroup's list of children is RCU protected, these primitives
require the RCU read-lock to be held, which is not the case for all
memcg callers.  This results in the following splat when e.g.  enabling
hierarchy mode:

  WARNING: CPU: 3 PID: 1 at kernel/cgroup.c:3043 css_next_child+0xa3/0x160()
  CPU: 3 PID: 1 Comm: systemd Not tainted 3.12.0-rc5-00117-g83f11a9-dirty #18
  Hardware name: LENOVO 3680B56/3680B56, BIOS 6QET69WW (1.39 ) 04/26/2012
  Call Trace:
    dump_stack+0x54/0x74
    warn_slowpath_common+0x78/0xa0
    warn_slowpath_null+0x1a/0x20
    css_next_child+0xa3/0x160
    mem_cgroup_hierarchy_write+0x5b/0xa0
    cgroup_file_write+0x108/0x2a0
    vfs_write+0xbd/0x1e0
    SyS_write+0x4c/0xa0
    system_call_fastpath+0x16/0x1b

In the memcg case, we only care about children when we are attempting to
modify inheritable attributes interactively.  Racing with deletion could
mean a spurious -EBUSY, no problem.  Racing with addition is handled
just fine as well through the memcg_create_mutex: if the child group is
not on the list after the mutex is acquired, it won't be initialized
from the parent's attributes until after the unlock.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agomm: memcg: lockdep annotation for memcg OOM lock
Johannes Weiner [Thu, 31 Oct 2013 23:34:14 +0000 (16:34 -0700)]
mm: memcg: lockdep annotation for memcg OOM lock

The memcg OOM lock is a mutex-type lock that is open-coded due to
memcg's special needs.  Add annotations for lockdep coverage.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agomm: memcg: use proper memcg in limit bypass
Johannes Weiner [Thu, 31 Oct 2013 23:34:13 +0000 (16:34 -0700)]
mm: memcg: use proper memcg in limit bypass

Commit 84235de394d9 ("fs: buffer: move allocation failure loop into the
allocator") allowed __GFP_NOFAIL allocations to bypass the limit if they
fail to reclaim enough memory for the charge.  But because the main test
case was on a 3.2-based system, the patch missed the fact that on newer
kernels the charge function needs to return root_mem_cgroup when
bypassing the limit, and not NULL.  This will corrupt whatever memory is
at NULL + percpu pointer offset.  Fix this quickly before problems are
reported.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>