GitHub/LineageOS/android_kernel_motorola_exynos9610.git
10 years agodrm/i915: Virtualize the ringbuffer signal func
Ben Widawsky [Tue, 29 Apr 2014 21:52:29 +0000 (14:52 -0700)]
drm/i915: Virtualize the ringbuffer signal func

This abstraction again is in preparation for gen8. Gen8 will bring new
semantics for doing this operation.

While here, make the writes of MI_NOOPs explicit for non-existent rings.
This should have been implicit before.

NOTE: This is going to be removed in a few patches.

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>
10 years agodrm/i915: Move semaphore specific ring members to struct
Ben Widawsky [Tue, 29 Apr 2014 21:52:28 +0000 (14:52 -0700)]
drm/i915: Move semaphore specific ring members to struct

This will be helpful in abstracting some of the code in preparation for
gen8 semaphores.

v2: Move mbox stuff to a separate struct

v3: Rebased over VCS2 work

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> (v1)
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: vlv: init only needed state during early power well enabling
Imre Deak [Fri, 25 Apr 2014 10:19:05 +0000 (13:19 +0300)]
drm/i915: vlv: init only needed state during early power well enabling

During the initial power well enabling on the driver init/resume path
we can avoid initialzing part of the HW/SW state that will be
initialized anyway by the subsequent init/resume code. For some steps
like HPD initialization this redundancy is not only an overhead but an
actual problem, since they can't be run this early in the overall init
sequence.

Add a flag marking the init phase and skip reinitialzing state that is
not strictly necessary based on that.

This is also needed by the upcoming HPD init restructuring by Thierry
and Daniel.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: Avoid NULL ctx->obj dereference in debugfs/i915_context_info
Chris Wilson [Wed, 30 Apr 2014 07:30:00 +0000 (08:30 +0100)]
drm/i915: Avoid NULL ctx->obj dereference in debugfs/i915_context_info

In commit 691e6415c891b8b2b082a120b896b443531c4d45
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Wed Apr 9 09:07:36 2014 +0100

    drm/i915: Always use kref tracking for all contexts.

we populated fake contexts on all platforms. These were identical to the
full hardware context tracking structs, except for the ctx->obj used to
store the hardware state. However, there remained one place where we
assumed that if a context existed, it would have an object associated
with it.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=77717
Testcase: igt/drv_suspend/debugfs-reader
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: Add intel_get_crtc_scanline()
Ville Syrjälä [Tue, 29 Apr 2014 10:35:45 +0000 (13:35 +0300)]
drm/i915: Add intel_get_crtc_scanline()

Add a new function intel_get_crtc_scanline() that returns the current
scanline counter for the crtc.

v2: Rebase after vblank timestamp changes.
    Use intel_ prefix instead of i915_ as is more customary for
    display related functions.
    Include DRM_SCANOUTPOS_INVBL in the return value even w/o
    adjustments, for a bit of extra consistency.
v3: Change the implementation to be based on DSL on all gens,
    since that's enough for the needs of atomic updates, and
    it will avoid complicating the scanout position calculations
    for the vblank timestamps
v4: Don't break scanline wraparound for interlaced modes

Reviewed-by: Sourab Gupta <sourabgupta@gmail.com>
Reviewed-by: Akash Goel <akash.goels@gmail.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: Fix scanout position for real
Ville Syrjälä [Tue, 29 Apr 2014 10:35:44 +0000 (13:35 +0300)]
drm/i915: Fix scanout position for real

Seems I've been a bit dense with regards to the start of vblank
vs. the scanline counter / pixel counter.

After staring at the pixel counter on gen4 I came to the conclusion
that the start of vblank interrupt and scanline counter increment
happen at the same time. The scanline counter increment is documented
to occur at start of hsync, which means that the start of vblank
interrupt must also trigger there. Looking at the pixel counter value
when the scanline wraps from vtotal-1 to 0 confirms that, as the pixel
counter at that point reads hsync_start. This also clarifies why we see
need the +1 adjustment to the scaline counter. The counter actually
starts counting from vtotal-1 on the first active line.

I also confirmed that the frame start interrupt happens ~1 line after
the start of vblank, but the frame start occurs at hblank_start instead.
We only use the frame start interrupt on gen2 where the start of vblank
interrupt isn't available. The only important thing to note here is that
frame start occurs after vblank start, so we don't have to play any
additional tricks to fix up the scanline counter.

The other thing to note is the fact that the pixel counter on gen3-4
starts counting from the start of horizontal active on the first active
line. That means that when we get the start of vblank interrupt, the
pixel counter reads (htotal*(vblank_start-1)+hsync_start). Since we
consider vblank to start at (htotal*vblank_start) we need to add a
constant (htotal-hsync_start) offset to the pixel counter, or else we
risk misdetecting whether we're in vblank or not.

I talked a bit with Art Runyan about these topics, and he confirmed my
findings. And that the same rules should hold for platforms which don't
have the pixel counter. That's good since without the pixel counter it's
rather difficult to verify the timings to this accuracy.

So the conclusion is that we can throw away all the ISR tricks I added,
and just increment the scanline counter by one always.

Reviewed-by: Sourab Gupta <sourabgupta@gmail.com>
Reviewed-by: Akash Goel <akash.goels@gmail.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915/bdw: Disable idle DOP clock gating
Ben Widawsky [Fri, 18 Apr 2014 21:04:29 +0000 (18:04 -0300)]
drm/i915/bdw: Disable idle DOP clock gating

It seems we need this at least for the current platforms we have, but
probably not later. In any event, it should cause too much harm as we do
the same thing on several other platforms.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Reviewed-by: Brad Volkin <bradley.d.volkin@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915/bdw: enable eDRAM.
Ben Widawsky [Fri, 18 Apr 2014 21:04:28 +0000 (18:04 -0300)]
drm/i915/bdw: enable eDRAM.

The same register exists for querying and programming eDRAM AKA eLLC. So
we can simply use it. For now, use all the same defaults as we had
for Haswell, since like Haswell, I have no further details.

I do not actually have a part with eDRAM, so I cannot test this.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Reviewed-by: Brad Volkin <bradley.d.volkin@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915/bdw: Add WT caching ability
Ben Widawsky [Fri, 18 Apr 2014 21:04:27 +0000 (18:04 -0300)]
drm/i915/bdw: Add WT caching ability

I don't have any insight on what parts can do what. The docs do seem to
suggest WT caching works in at least the same manner as it does on
Haswell.

The addr = 0  is to shut up GCC:
drivers/gpu/drm/i915/i915_gem_gtt.c:80:7: warning: 'addr' may be used
uninitialized in this function [-Wmaybe-uninitialized]

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Reviewed-by: Brad Volkin <bradley.d.volkin@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: bdw: fix RC6 enabled status reporting and disable runtime PM
Imre Deak [Mon, 28 Apr 2014 09:03:59 +0000 (12:03 +0300)]
drm/i915: bdw: fix RC6 enabled status reporting and disable runtime PM

On BDW we don't enable RC6 at the moment, but this isn't reflected in
the (sanitized) i915.enable_rc6 option. So make enable_rc6 report
correctly that RC6 is disabled, which will also effectively disable RPM
on BDW (since RPM depends on RC6).

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=77565

Signed-off-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: Fix assert_plane warning during FDI link train
Ville Syrjälä [Fri, 25 Apr 2014 19:12:07 +0000 (22:12 +0300)]
drm/i915: Fix assert_plane warning during FDI link train

assert_plane_enabled() is now triggering during FDI link train because
we no longer enable planes that early.

This problem got introduced in:
 commit a5c4d7bc187bd13bc11ac06bb4ea3a0d4001aa4d
 Author: Ville Syrjälä <ville.syrjala@linux.intel.com>
 Date:   Fri Mar 7 18:32:13 2014 +0200

    drm/i915: Disable/enable planes as the first/last thing during modeset on ILK+

Just drop the assert since we shouldn't need planes for link training.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
[danvet: Squash in fixup for now unused plane local variable, reported
by 0-day tester.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agoRevert "drm/i915: fix build warning on 32-bit (v2)"
Jan Moskyto Matejka [Mon, 28 Apr 2014 13:03:23 +0000 (15:03 +0200)]
Revert "drm/i915: fix build warning on 32-bit (v2)"

This reverts commit 60f2b4af1258c05e6b037af866be81abc24438f7.

The same warning has been fixed in e5081a538a565284fec5f30a937d98e460d5e780 and
these two commits got merged in 74e99a84de2d0980320612db8015ba606af42114 which
caused another warning. Simply, the reverted commit casted the pointer
difference to unsigned long and the other commit changed the output type from
long to ptrdiff_t.

The other commit fixes the original warning the better way so I'm reverting
this commit now.

Signed-off-by: Jan Moskyto Matejka <mq@suse.cz>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: Fix deadlock during driver init on ILK
Ville Syrjälä [Fri, 25 Apr 2014 19:11:51 +0000 (22:11 +0300)]
drm/i915: Fix deadlock during driver init on ILK

We have a struct_mutex deadlock during driver init on ILK

[   54.320273] =============================================
[   54.320371] [ INFO: possible recursive locking detected ]
[   54.320471] 3.15.0-rc2-flip_race+ #2 Not tainted
[   54.320567] ---------------------------------------------
[   54.320665] modprobe/2178 is trying to acquire lock:
[   54.320762]  (&dev->struct_mutex){+.+.+.}, at: [<ffffffffa0568b05>] intel_enable_gt_powersave+0xa5/0x9d0 [i915]
[   54.321111]
[   54.321111] but task is already holding lock:
[   54.321250]  (&dev->struct_mutex){+.+.+.}, at: [<ffffffffa05b4c2e>] intel_modeset_init_hw+0x3e/0x60 [i915]
[   54.321583]
[   54.321583] other info that might help us debug this:
[   54.321724]  Possible unsafe locking scenario:
[   54.321724]
[   54.321863]        CPU0
[   54.321954]        ----
[   54.322046]   lock(&dev->struct_mutex);
[   54.322221]   lock(&dev->struct_mutex);
[   54.322397]
[   54.322397]  *** DEADLOCK ***
[   54.322397]
[   54.322638]  May be due to missing lock nesting notation
[   54.322638]
[   54.322781] 4 locks held by modprobe/2178:
[   54.322875]  #0:  (&dev->mutex){......}, at: [<ffffffff813592eb>] __driver_attach+0x5b/0xb0
[   54.323230]  #1:  (&dev->mutex){......}, at: [<ffffffff813592f9>] __driver_attach+0x69/0xb0
[   54.323582]  #2:  (drm_global_mutex){+.+.+.}, at: [<ffffffffa04e1e0d>] drm_dev_register+0x2d/0x120 [drm]
[   54.323945]  #3:  (&dev->struct_mutex){+.+.+.}, at: [<ffffffffa05b4c2e>] intel_modeset_init_hw+0x3e/0x60 [i915]

This regression got introduced in:
 commit 586d5270b60dc1f35cc3ca982d403765bad77965
 Author: Imre Deak <imre.deak@intel.com>
 Date:   Mon Apr 14 20:24:28 2014 +0300

    drm/i915: move getting struct_mutex lower in the callstack during GPU reset

Fix the problem by not taking struct_mutex around intel_enable_gt_powersave()
in intel_modeset_init_hw() since intel_enable_gt_powersave() now grabs the
mutex itself.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: remove extraneous VGA power domain put calls
Imre Deak [Fri, 25 Apr 2014 14:28:00 +0000 (17:28 +0300)]
drm/i915: remove extraneous VGA power domain put calls

In recent dmesg logs reported for unrelated issues I noticed some power
domain WARNs caused by the following.

The workaround

commit ce352550327b394f3072a07c9cd9d27af9276f15
Author: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date:   Fri Sep 20 10:14:23 2013 +0300

    drm/i915: Fix unclaimed register access due to delayed VGA memory disable

and following fixup of it

commit a14853206517b0c8102accbc77401805a0dbdb9e
Author: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date:   Mon Sep 16 17:38:34 2013 +0300

    drm/i915: Move power well init earlier during driver load

was partially reverted by

commit 7f16e5c1416070dc590dd333a2d677700046a4ab
Merge: 9d1cb91 5e01dc7
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Mon Nov 4 16:28:47 2013 +0100

    Merge tag 'v3.12' into drm-intel-next

but kept the power domain put calls on the error path.

I think for now we can keep things as-is (not reintroduce the w/a) and just fix
the error path, since
- nobody complained seeing this issue
- according to Ville someone is reworking the VGA arbitration scheme at the
  moment and when that's ready we have to rethink this part anyway

So fix this by just removing the put calls from the error path as well.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: Integrate cmd parser kerneldoc
Daniel Vetter [Fri, 25 Apr 2014 14:59:00 +0000 (16:59 +0200)]
drm/i915: Integrate cmd parser kerneldoc

Ville noticed that we have this nice kerneldoc but it's not integrated
anywhere. Fix this asap!

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Brad Volkin <bradley.d.volkin@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: Do not call retire_requests from wait_for_rendering
Chris Wilson [Mon, 17 Mar 2014 12:21:55 +0000 (12:21 +0000)]
drm/i915: Do not call retire_requests from wait_for_rendering

A common issue we have is that retiring requests causes recursion
through GTT manipulation or page table manipulation which we can only
handle at very specific points. However, to maintain internal
consistency (enforced through our sanity checks on write_domain at
various points in the GEM object lifecycle) we do need to retire the
object prior to marking it with a new write_domain, and also clear the
write_domain for the implicit flush following a batch.

Note that this then allows the unbound objects to still be on the active
lists, and so care must be taken when removing objects from unbound lists
(similar to the caveats we face processing the bound lists).

v2: Fix i915_gem_shrink_all() to handle updated object lifetime rules,
by refactoring it to call into __i915_gem_shrink().

v3: Missed an object-retire prior to changing cache domains in
i915_gem_object_set_cache_leve()

v4: Rebase

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Tested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Brad Volkin <bradley.d.volkin@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agolib: Export interval_tree
Chris Wilson [Mon, 17 Mar 2014 12:21:54 +0000 (12:21 +0000)]
lib: Export interval_tree

lib/interval_tree.c provides a simple interface for an interval-tree
(an augmented red-black tree) but is only built when testing the generic
macros for building interval-trees. For drivers with modest needs,
export the simple interval-tree library as is.

v2: Lots of help from Michel Lespinasse to only compile the code
    as required:
    - make INTERVAL_TREE a config option
    - make INTERVAL_TREE_TEST select the library functions
      and sanitize the filenames & Makefile
    - prepare interval_tree for being built as a module if required

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Michel Lespinasse <walken@google.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Michel Lespinasse <walken@google.com>
[Acked for inclusion via drm/i915 by Andrew Morton.]
[danvet: switch to _GPL as per the mailing list discussion.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: vlv: increase timeout when forcing on the GFX clock
Imre Deak [Mon, 14 Apr 2014 17:24:43 +0000 (20:24 +0300)]
drm/i915: vlv: increase timeout when forcing on the GFX clock

I've seen latencies up to 15msec, so increase the timeout to 20msec.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: vlv: factor out vlv_force_gfx_clock and check for pending force-off
Imre Deak [Fri, 18 Apr 2014 13:35:02 +0000 (16:35 +0300)]
drm/i915: vlv: factor out vlv_force_gfx_clock and check for pending force-off

This will be needed by the VLV runtime PM helpers too, so factor it out.

Also add a safety check for the case where the previous force-off is
still pending, since I'm not sure if Punit can handle a new setting
while the previous one hasn't settled yet.

v2:
- unchanged
v3:
- add a note to the commit message about the safety check (Ville)

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: vlv: setup RPS min/max frequencies once during init time
Imre Deak [Mon, 14 Apr 2014 17:24:41 +0000 (20:24 +0300)]
drm/i915: vlv: setup RPS min/max frequencies once during init time

When enabling runtime PM on VLV, GT power save enabling becomes relatively
frequent, so optimize it a bit.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: reinit GT power save during resume
Imre Deak [Tue, 22 Apr 2014 17:21:07 +0000 (20:21 +0300)]
drm/i915: reinit GT power save during resume

During runtime suspend there can be a last pending rps.work, so make
sure it's canceled. Note that in the runtime suspend callback we can't
get any RPS interrupts since it's called only after the GPU goes idle
and we set the minimum RPS frequency. The next possibility for an RPS
interrupt is only after getting an RPM ref (for example because of a new
GPU command) and calling the RPM resume callback.

v2:
- patch introduced in v2 of the patchset
v3:
- Change the order of canceling the rps.work and disabling interrupts to
  avoid the race between interrupt disabling and the the rps.work. Race
  spotted by Ville.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: make runtime PM swizzling/ring_freq init platform independent
Imre Deak [Mon, 14 Apr 2014 17:24:39 +0000 (20:24 +0300)]
drm/i915: make runtime PM swizzling/ring_freq init platform independent

We need to re-init sizzling on all platforms so move it to the
platform independent runtime resume callback. The ring frequency reinit
is also needed everywhere except on VLV, but gen6_update_ring_freq()
will be a noop on VLV, so we can move this function too to platform
independent code.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: factor out gen6_update_ring_freq
Imre Deak [Fri, 18 Apr 2014 13:16:23 +0000 (16:16 +0300)]
drm/i915: factor out gen6_update_ring_freq

This is needed by the next patch moving the call out from platform
specific RPM callbacks to platform independent code.

No functional change.

v2:
- patch introduce in v2 of the patchset
v3:
- simplify platform check condition (Ville)

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: make runtime PM interrupt enable/disable platform independent
Imre Deak [Mon, 14 Apr 2014 17:24:37 +0000 (20:24 +0300)]
drm/i915: make runtime PM interrupt enable/disable platform independent

We need to disable the interrupts for all platforms, so make the helpers
for this platform independent and call them from them platform
independent runtime suspend/resume callbacks.

On HSW/BDW this will move interrupt disabling/re-enabling at the
beginning/end of runtime suspend/resume respectively, but I don't see
any reason why this would cause a problem there. In any case this seems
to be the correct thing to do even on those platforms.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: disable runtime PM if RC6 is disabled
Imre Deak [Mon, 14 Apr 2014 17:24:36 +0000 (20:24 +0300)]
drm/i915: disable runtime PM if RC6 is disabled

On VLV we depend on RC6 to save the GT render and media HW context
before going to the D3 state via RPM, so as a preparation for the
VLV RPM support (added in an upcoming patch) disable RPM if RC6 is
disabled.

There is probably a similar dependency on other platforms too, so for
safety require RC6 for those too. For these platforms (SNB, HSW, BDW)
this is then a possible fix.

v2:
- require RC6 for all RPM platforms, not just for VLV (Paulo, Daniel)

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: sanitize enable_rc6 option
Imre Deak [Fri, 18 Apr 2014 13:01:02 +0000 (16:01 +0300)]
drm/i915: sanitize enable_rc6 option

Atm, an invalid enable_rc6 module option will be silently ignored, so
emit an info message about it. Doing an early sanitization we can also
reuse intel_enable_rc6() in a follow-up patch to see if RC6 is actually
enabled. Currently the caller would have to filter a non-zero return
value based on the platform we are running on. For example on VLV with
i915.enable_rc6 set to 2, RC6 won't be enabled but atm
intel_enable_rc6() would still return 2 in this case.

v2:
- simplify the platform check condition (Ville)

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: fix unbalanced GT powersave enable / disable calls
Imre Deak [Mon, 14 Apr 2014 17:24:34 +0000 (20:24 +0300)]
drm/i915: fix unbalanced GT powersave enable / disable calls

Atm, we call intel_gt_powersave_enable() for GEN6 and GEN7 but disable
it for everything starting from GEN6. This is a problem in case of BDW.
Since I don't have a BDW to test if RC6 works properly, just keep it
disabled for now and fix only the disable function.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: vlv: check port power domain instead of only D0 for eDP VDD on
Imre Deak [Mon, 14 Apr 2014 17:24:33 +0000 (20:24 +0300)]
drm/i915: vlv: check port power domain instead of only D0 for eDP VDD on

Some platforms need additional power domains to be on in addition to the
device D0 state to access the panel registers.

Suggested by Daniel.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=76987
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: add missing error capturing of the PIPESTAT reg
Imre Deak [Fri, 18 Apr 2014 12:55:04 +0000 (15:55 +0300)]
drm/i915: add missing error capturing of the PIPESTAT reg

While checking the error capture path I noticed that we lacked the
power domain-on check for PIPESTAT so fix this by moving that to where
the rest of pipe registers are captured.

The move also revealed that we actually don't include this register in
the error report, so fix that too.

v2:
- patch introduced in v2 of the patchset
v3:
- add back !HAS_PCH_SPLIT check (Ville)
[ Ignore my previous comment about the gen<=5 || vlv check, I realized
  that it's the same as !HAS_PCH_SPLIT. ]

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: gen2: move error capture of IER to its correct place
Imre Deak [Mon, 14 Apr 2014 17:24:31 +0000 (20:24 +0300)]
drm/i915: gen2: move error capture of IER to its correct place

While checking the error capture path I noticed that this register is
read twice for GEN2, so fix this and also move the read where it's done
for other platforms.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: get a runtime PM ref for the deferred GPU reset work
Imre Deak [Tue, 22 Apr 2014 22:09:04 +0000 (01:09 +0300)]
drm/i915: get a runtime PM ref for the deferred GPU reset work

Atm we can end up in the GPU reset deferred work in D3 state if the last
runtime PM reference is dropped between detecting a hang/scheduling the
work and executing the work. At least one such case I could trigger is
the simulated reset via the i915_wedged debugfs entry. Fix this by
getting an RPM reference around accessing the HW in the reset work.

v2:
- Instead of getting/putting the RPM reference in the reset work itself,
  get it already before scheduling the work. By this we also prevent
  going to D3 before the work gets to run, in addition to making sure
  that we run the work itself in D0. (Ville, Daniel)
v3:
- fix inverted logic fail when putting the RPM ref on behalf of a
  cancelled GPU reset work (Ville)
v4:
- Taking the RPM ref in the interrupt handler isn't really needed b/c
  it's already guaranteed that we hold an RPM ref until the end of the
  reset work in all cases we care about. So take the ref in the reset
  work (for cases like i915_wedged_set). (Daniel)

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: Validate VBT header before trusting it
Chris Wilson [Fri, 18 Apr 2014 21:04:22 +0000 (18:04 -0300)]
drm/i915: Validate VBT header before trusting it

Be we read and chase pointers from the VBT, it is prudent to make sure
that those accesses are wholly contained within the MMIO region, or else
we may cause a kernel panic during boot.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Reviewed-by: Shobhit Kumar <shobhit.kumar@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: Validate BDB section before reading
Chris Wilson [Fri, 18 Apr 2014 21:04:23 +0000 (18:04 -0300)]
drm/i915: Validate BDB section before reading

Make sure that the whole BDB section is within the MMIO region prior to
accessing it contents. That we don't read outside of the secion is left
up to the individual section parsers.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Reviewed-by: Shobhit Kumar <shobhit.kumar@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: get a runtime PM ref for the deferred GT powersave enabling
Imre Deak [Mon, 14 Apr 2014 17:24:29 +0000 (20:24 +0300)]
drm/i915: get a runtime PM ref for the deferred GT powersave enabling

At least on VLV but probably on other platforms too we depend on RC6
being enabled for RPM, so disable RPM until the delayed RC6 enabling
completes.

v2:
- explain the reason for the _noresume version of RPM get (Daniel)
- use the simpler 'if (schedule_work()) rpm_get();' instead of
  'if (!cancel_work_sync()) rpm_get(); schedule_work();'

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: move getting struct_mutex lower in the callstack during GPU reset
Imre Deak [Mon, 14 Apr 2014 17:24:28 +0000 (20:24 +0300)]
drm/i915: move getting struct_mutex lower in the callstack during GPU reset

Getting struct_mutex around the whole intel_enable_gt_powersave()
function is not necessary, since it's only needed for the ILK path
therein.

This will make intel_enable_gt_powersave() useable on the RPM resume
path for >=GEN6 (added in an upcoming patch to reset the RPS state
during RPM resume), where we can't (and need not) get this mutex.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: get a runtime PM ref for debugfs entries where needed
Imre Deak [Mon, 14 Apr 2014 17:24:27 +0000 (20:24 +0300)]
drm/i915: get a runtime PM ref for debugfs entries where needed

These debugfs entries access registers that need the D0 power state so
get an RPM ref for them.

v2:
- for all these entries we only need D0 state, so get only an RPM ref,
  not a power domain ref (Daniel, Paulo)
- the dpio entry is not an issue any more as it got removed (Ville)
- restore commit message from v1 (Paulo)

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: remove the i915_dpio debugfs entry
Imre Deak [Mon, 14 Apr 2014 17:24:26 +0000 (20:24 +0300)]
drm/i915: remove the i915_dpio debugfs entry

There are igt tools that can read/write the DPIO registers, so having a
debugfs entry for only some of those registers is somewhat arbitrary /
redundant. Remove it.

v2:
- instead of fixing the entry by taking a power domain reference around
  the register accesses, remove the entry (Ville)

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: fix the RC6 status debug print
Imre Deak [Mon, 14 Apr 2014 17:24:25 +0000 (20:24 +0300)]
drm/i915: fix the RC6 status debug print

The parsing was incorrect for ILK and VLV.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: vlv: add RC6 residency counters
Imre Deak [Mon, 14 Apr 2014 17:24:24 +0000 (20:24 +0300)]
drm/i915: vlv: add RC6 residency counters

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: vlv: clear master interrupt flag when disabling interrupts
Imre Deak [Mon, 14 Apr 2014 17:24:23 +0000 (20:24 +0300)]
drm/i915: vlv: clear master interrupt flag when disabling interrupts

Not clearing this flag causes spurious interrupts at least in D3 state,
so before enabling RPM we need to fix this. We were already setting this
flag when enabling interrupts, only clearing it was missing.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: vlv: clean up GTLC wake control/status register macros
Imre Deak [Mon, 14 Apr 2014 17:24:22 +0000 (20:24 +0300)]
drm/i915: vlv: clean up GTLC wake control/status register macros

These will be needed by the upcoming VLV RPM helpers.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: Use the coarse ping-pong mechanism based on drm fd to dispatch the BSD...
Zhao Yakui [Thu, 17 Apr 2014 02:37:40 +0000 (10:37 +0800)]
drm/i915: Use the coarse ping-pong mechanism based on drm fd to dispatch the BSD command on BDW GT3

The BDW GT3 has two independent BSD rings, which can be used to process the
video commands. To be simpler, it is transparent to user-space driver/middle.
Instead the kernel driver will decide which ring is to dispatch the BSD video
command.

As every BSD ring is powerful, it is enough to dispatch the BSD video command
based on the drm fd. In such case it can play back video stream while encoding
another video stream. The coarse ping-pong mechanism is used to determine
which BSD ring is used to dispatch the BSD video command.

V1->V2: Follow Daniel's comment and use the simple ping-pong mechanism.
This is only to add the support of dual BSD rings on BDW GT3 machine.
The further optimization will be considered in another patch set.

V2->V3: Follow Daniel's comment to use the struct_mutext instead of
atomic_t during determining which ring can be used to dispatch Video command.

Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915:Add the VCS2 switch in Intel_ring_setup_status_page
Zhao Yakui [Thu, 17 Apr 2014 02:37:39 +0000 (10:37 +0800)]
drm/i915:Add the VCS2 switch in Intel_ring_setup_status_page

The Gen7 doesn't have the second BSD ring. But it will complain the switch check
warning message during compilation. So just add it to remove the
switch check warning.

V1->V2: Follow Daniel's comment to update the comment

Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915:Handle the irq interrupt for the second BSD ring
Zhao Yakui [Thu, 17 Apr 2014 02:37:38 +0000 (10:37 +0800)]
drm/i915:Handle the irq interrupt for the second BSD ring

Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915:Initialize the second BSD ring on BDW GT3 machine
Zhao Yakui [Thu, 17 Apr 2014 02:37:37 +0000 (10:37 +0800)]
drm/i915:Initialize the second BSD ring on BDW GT3 machine

Based on the hardware spec, the BDW GT3 machine has two independent
BSD ring that can be used to dispatch the video commands.
So just initialize it.

V3->V4: Follow Imre's comment to do some minor updates. For example:
more comments are added to describe the semaphore between ring.

Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
[danvet: Fix up checkpatch error.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: Update the restrict check to filter out wrong Ring ID passed by user-space
Zhao Yakui [Thu, 17 Apr 2014 02:37:36 +0000 (10:37 +0800)]
drm/i915: Update the restrict check to filter out wrong Ring ID passed by user-space

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: Split the BDW device definition to prepare for dual BSD rings on BDW GT3
Zhao Yakui [Thu, 17 Apr 2014 02:37:35 +0000 (10:37 +0800)]
drm/i915: Split the BDW device definition to prepare for dual BSD rings on BDW GT3

Based on the hardware spec, the BDW GT3 has the different configuration
with the BDW GT1/GT2. So split the BDW device info definition.
This is to do the preparation for adding the Dual BSD rings on BDW GT3 machine.

V1->V2: Follow Daniel's comment to pay attention to the stolen check for BDW
in kernel/early-quirks.c

Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: Catch dirt in unused execbuffer fields
Daniel Vetter [Thu, 24 Apr 2014 06:09:11 +0000 (08:09 +0200)]
drm/i915: Catch dirt in unused execbuffer fields

We need to make sure that userspace keeps on following the contract,
otherwise we won't be able to use the reserved fields at all.

v2: Add DRM_DEBUG (Chris)

Testcase: igt/gem_exec_params/*-dirt
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: Catch abuse of I915_EXEC_CONSTANTS_*
Daniel Vetter [Thu, 24 Apr 2014 06:09:10 +0000 (08:09 +0200)]
drm/i915: Catch abuse of I915_EXEC_CONSTANTS_*

A bit tricky since 0 is also a valid constant ...

v2: Add DRM_DEBUG (Chris)

Testcase: igt/gem_exec_params/rel-constants-*
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: Catch abuse of I915_EXEC_GEN7_SOL_RESET
Daniel Vetter [Thu, 24 Apr 2014 06:09:09 +0000 (08:09 +0200)]
drm/i915: Catch abuse of I915_EXEC_GEN7_SOL_RESET

Currently we catch it, but silently succeed. Our userspace is
better than this.

v2: Add DRM_DEBUG (Chris)

Testcase: igt/gem_exec_params/sol-reset-*
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: Include a little more information about why ring init fails
Chris Wilson [Wed, 9 Apr 2014 08:19:44 +0000 (09:19 +0100)]
drm/i915: Include a little more information about why ring init fails

If we include the expected values for the failing ring register checks,
it makes it marginally easier to see which is the culprit.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Oscar Mateo <oscar.mateo@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: Mark device as wedged if we fail to resume
Chris Wilson [Wed, 9 Apr 2014 08:19:43 +0000 (09:19 +0100)]
drm/i915: Mark device as wedged if we fail to resume

During module load, if we fail to initialise the rings, we abort the
load reporting EIO. However during resume, even though we report EIO as
we fail to reinitialize the ringbuffers, the resume continues and the
device is restored - albeit in a non-functional state. As we cannot
execute any commands on the GPU, it is effectively wedged, mark it so.

As we now preserve the ringbuffers across resume, this should prevent
UXA from falling into the trap of repeatedly sending invalid
batchbuffers and dropping all further rendering into /dev/null.

Reported-and-tested-by: Jiri Kosina <jkosina@suse.cz>
References: https://bugs.freedesktop.org/show_bug.cgi?id=76554
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Oscar Mateo <oscar.mateo@intel.com>
[danvet: Drop unused error, spotted by Oscar.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: Allow the module to load even if we fail to setup rings
Chris Wilson [Wed, 9 Apr 2014 08:19:42 +0000 (09:19 +0100)]
drm/i915: Allow the module to load even if we fail to setup rings

Even without enabling the ringbuffers to allow command execution, we can
still control the display engines to enable modesetting. So make the
ringbuffer initialization failure soft, and mark the GPU as wedged
instead.

v2: Only treat an EIO from ring initialisation as a soft failure, and
abort module load for any other failure, such as allocation failures.

v3: Add an *ERROR* prior to declaring the GPU wedged so that it stands
out like a sore thumb in the logs

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Oscar Mateo <oscar.mateo@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: Preserve ring buffers objects across resume
Chris Wilson [Wed, 9 Apr 2014 08:19:41 +0000 (09:19 +0100)]
drm/i915: Preserve ring buffers objects across resume

Tearing down the ring buffers across resume is overkill, risks
unnecessary failure and increases fragmentation.

After failure, since the device is still active we may end up trying to
write into the dangling iomapping and trigger an oops.

v2: stop_ringbuffers() was meant to call stop(ring) not
cleanup(ring) during resume!

Reported-by: Jae-hyeon Park <jhyeon@gmail.com>
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=72351
References: https://bugs.freedesktop.org/show_bug.cgi?id=76554
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Oscar Mateo <oscar.mateo@intel.com>
[danvet: s/ring->obj == NULL/!intel_ring_initialized(ring)/ as
suggested by Oscar.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: Replace hardcoded cacheline size with macro
Chris Wilson [Wed, 9 Apr 2014 08:19:40 +0000 (09:19 +0100)]
drm/i915: Replace hardcoded cacheline size with macro

For readibility and guess at the meaning behind the constants.

v2: Claim only the meagerest connections with reality.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Oscar Mateo <oscar.mateo@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agodrm/i915: remove unexplained vblank wait in the DP off code
Jesse Barnes [Fri, 11 Apr 2014 21:25:41 +0000 (14:25 -0700)]
drm/i915: remove unexplained vblank wait in the DP off code

I don't think this is necessary; at least it doesn't appear to be on my
BYT.  Dropping it speeds up our shutdown code a little, in some cases
resulting in faster init times.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
10 years agoMerge branch 'drm-init-cleanup' of git://people.freedesktop.org/~danvet/drm into...
Dave Airlie [Wed, 30 Apr 2014 23:32:21 +0000 (09:32 +1000)]
Merge branch 'drm-init-cleanup' of git://people.freedesktop.org/~danvet/drm into drm-next

Next pull request, this time more of the drm de-midlayering work. The big
thing is that his patch series here removes everything from drm_bus except
the set_busid callback. Thierry has a few more patches on top of this to
make that one optional to.

With that we can ditch all the non-pci drm_bus implementations, which
Thierry has already done for the fake tegra host1x drm_bus.

Reviewed by Thierry, Laurent and David and now also survived some testing
on my intel boxes to make sure the irq fumble is fixed correctly ;-) The
last minute rebase was just to add the r-b tags from Thierry for the 2
patches I've redone.

* 'drm-init-cleanup' of git://people.freedesktop.org/~danvet/drm:
  drm/<drivers>: don't set driver->dev_priv_size to 0
  drm: Remove dev->kdriver
  drm: remove drm_bus->get_name
  drm: rip out dev->devname
  drm: inline drm_pci_set_unique
  drm: remove bus->get_irq implementations
  drm: pass the irq explicitly to drm_irq_install
  drm/irq: Look up the pci irq directly in the drm_control ioctl
  drm/irq: track the irq installed in drm_irq_install in dev->irq
  drm: rename dev->count_lock to dev->buf_lock
  drm: Rip out totally bogus vga_switcheroo->can_switch locking
  drm: kill drm_bus->bus_type
  drm: remove drm_dev_to_irq from drivers
  drm/irq: remove cargo-culted locking from irq_install/uninstall
  drm/irq: drm_control is a legacy ioctl, so pci devices only
  drm/pci: fold in irq_by_busid support
  drm/irq: simplify irq checks in drm_wait_vblank

10 years agoMerge branch 'drm-coverity-fixes' of git://people.freedesktop.org/~danvet/drm into...
Dave Airlie [Wed, 30 Apr 2014 23:31:33 +0000 (09:31 +1000)]
Merge branch 'drm-coverity-fixes' of git://people.freedesktop.org/~danvet/drm into drm-next

bunch of coverity fixes all minor.

* 'drm-coverity-fixes' of git://people.freedesktop.org/~danvet/drm:
  drm: Fix error handling in drm_master_create
  drm/i2c/tda998x: Fix signed overflow issue
  drm/bochs: Remove unecessary NULL check in gem_free
  drm/bochs: Remove unnecessary NULL check in bo_unref
  drm/udl: Initialize ret in udl_driver_load
  drm/via: Remove unecessary NULL check
  drm/ast: Remove unecessary NULL check in gem_free
  drm/ast: Remove unnecessary NULL check in bo_unref
  drm/cirrus: Remove unecessary NULL check in gem_free
  drm/cirrus: Remove unnecessary NULL check in bo_unref
  drm/mgag200: Remove unecessary NULL check in gem_free
  drm/mgag200: Remove unecessary NULL check in bo_unref

10 years agodrm: qxl: Remove unused device pointer
Christian Engelmayer [Sat, 8 Feb 2014 19:02:21 +0000 (20:02 +0100)]
drm: qxl: Remove unused device pointer

Remove occurrences of unused struct qxl_device pointer in functions
qxl_ttm_fault() and qxl_init_mem_type().

Detected by Coverity: CID 1019128, CID 1019129.

Signed-off-by: Christian Engelmayer <cengelma@gmx.at>
Signed-off-by: Dave Airlie <airlied@redhat.com>
10 years agodrm: try harder to avoid regression when merging mode bits
Dave Airlie [Wed, 30 Apr 2014 23:26:53 +0000 (09:26 +1000)]
drm: try harder to avoid regression when merging mode bits

For QXL hw we really want the bits to be replaced as we change
the preferred mode on the fly, and the same goes for virgl when
I get to it, however the original fix for this seems to have caused
a wierd regression on Intel G33 that in a stunning display of failure
at opposition to his normal self, Daniel failed to diagnose.

So we are left doing this, ugly ugly ugly ugly, Daniel you fixed
that G33 yet?, ugly, ugly.

Tested-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
10 years agoMerge tag 'drm-intel-next-2014-04-16' of git://anongit.freedesktop.org/drm-intel...
Dave Airlie [Wed, 30 Apr 2014 23:11:37 +0000 (09:11 +1000)]
Merge tag 'drm-intel-next-2014-04-16' of git://anongit.freedesktop.org/drm-intel into drm-next

drm-intel-next-2014-04-16:
- vlv infoframe fixes from Jesse
- dsi/mipi fixes from Shobhit
- gen8 pageflip fixes for LRI/SRM from Damien
- cmd parser fixes from Brad Volkin
- some prep patches for CHV, DRRS, ...
- and tons of little things all over
drm-intel-next-2014-04-04:
- cmd parser for gen7 but only in enforcing and not yet granting mode - the
  batch copying stuff is still missing. Also performance is a bit ... rough
  (Brad Volkin + OACONTROL fix from Ken).
- deprecate UMS harder (i.e. CONFIG_BROKEN)
- interrupt rework from Paulo Zanoni
- runtime PM support for bdw and snb, again from Paulo
- a pile of refactorings from various people all over the place to prep for new
  stuff (irq reworks, power domain polish, ...)

drm-intel-next-2014-04-04:
- cmd parser for gen7 but only in enforcing and not yet granting mode - the
  batch copying stuff is still missing. Also performance is a bit ... rough
  (Brad Volkin + OACONTROL fix from Ken).
- deprecate UMS harder (i.e. CONFIG_BROKEN)
- interrupt rework from Paulo Zanoni
- runtime PM support for bdw and snb, again from Paulo
- a pile of refactorings from various people all over the place to prep for new
  stuff (irq reworks, power domain polish, ...)

Conflicts:
drivers/gpu/drm/i915/i915_gem_context.c

10 years agoARC: !PREEMPT: Ensure Return to kernel mode is IRQ safe
Vineet Gupta [Wed, 30 Apr 2014 09:56:45 +0000 (15:26 +0530)]
ARC: !PREEMPT: Ensure Return to kernel mode is IRQ safe

There was a very small race window where resume to kernel mode from a
Exception Path (or pure kernel mode which is true for most of ARC
exceptions anyways), was not disabling interrupts in restore_regs,
clobbering the exception regs

Anton found the culprit call flow (after many sleepless nights)

| 1. we got a Trap from user land
| 2. started to service it.
| 3. While doing some stuff on user-land memory (I think it is padzero()),
|     we got a DataTlbMiss
| 4. On return from it we are taking "resume_kernel_mode" path
| 5. NEED_RESHED is not set, so we go to "return from exception" path in
|     restore regs.
| 6. there seems to be IRQ happening

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: <stable@vger.kernel.org> #3.10, 3.12, 3.13, 3.14
Cc: Anton Kolesov <Anton.Kolesov@synopsys.com>
Cc: Francois Bedard <Francois.Bedard@synopsys.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agoMerge tag 'sound-3.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai...
Linus Torvalds [Wed, 30 Apr 2014 15:15:59 +0000 (08:15 -0700)]
Merge tag 'sound-3.15-rc4' of git://git./linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "A few collections of small eggs that have been gathered during the
  Easter holidays.  Mostly small ASoC fixes, with a HD-audio quirk and a
  workaround for Nvidia controller"

* tag 'sound-3.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda - Suppress CORBRP clear on Nvidia controller chips
  ALSA: hda - add headset mic detect quirk for a Dell laptop
  ASoC: jz4740: Remove Makefile entry for removed file
  ASoC: Intel: Fix audio crash due to negative address offset
  ASoC: dapm: Fix widget double free with auto-disable DAPM kcontrol
  ASoC: Intel: Fix incorrect sizeof() in sst_hsw_stream_get_volume()
  ASoC: Intel: some incorrect sizeof() usages
  ASoC: cs42l73: Convert to use devm_gpio_request_one
  ASoC: cs42l52: Convert to use devm_gpio_request_one
  ASoC: tlv320aic31xx: document that the regulators are mandatory
  ASoC: fsl_spdif: Fix wrong OFFSET of STC_SYSCLK_DIV
  ASoC: alc5623: Fix regmap endianness
  ASoC: tlv320aic3x: fix shared reset pin for DT
  ASoC: rsnd: fix clock prepare/unprepare

10 years agoMerge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Wed, 30 Apr 2014 00:51:26 +0000 (17:51 -0700)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
 "Smattering of fixes, i915, exynos, tegra, msm, vmwgfx.

  A bit of framebuffer reference counting fallout fixes, i915 GM45
  regression fix, DVI regression fix, vmware info leak between processes
  fix"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/exynos: use %pad for dma_addr_t
  drm/exynos: dsi: use IS_ERR() to check devm_ioremap_resource() results
  MAINTAINERS: update maintainer entry for Exynos DP driver
  drm/exynos: balance framebuffer refcount
  drm/i915: Move all ring resets before setting the HWS page
  drm/i915: Don't WARN nor handle unexpected hpd interrupts on gmch platforms
  drm/msm/mdp4: cure for the cursor blues (v2)
  drm/msm: default to XR24 rather than AR24
  drm/msm: fix memory leak
  drm/tegra: restrict plane loops to legacy planes
  drm/i915: Allow full PPGTT with param override
  drm/i915: Discard BIOS framebuffers too small to accommodate chosen mode
  drm/vmwgfx: Make sure user-space can't DMA across buffer object boundaries v2
  drm/i915: get power domain in case the BIOS enabled eDP VDD
  drm/i915: Don't check gmch state on inherited configs
  drm/i915: Allow user modes to exceed DVI 165MHz limit

10 years agodrm/exynos: use %pad for dma_addr_t
Jingoo Han [Tue, 22 Apr 2014 05:45:32 +0000 (14:45 +0900)]
drm/exynos: use %pad for dma_addr_t

Use %pad for dma_addr_t, because a dma_addr_t type can vary
based on build options. So, it prevents possible build warnings
in printks.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
10 years agodrm/exynos: dsi: use IS_ERR() to check devm_ioremap_resource() results
Jingoo Han [Thu, 17 Apr 2014 10:08:40 +0000 (19:08 +0900)]
drm/exynos: dsi: use IS_ERR() to check devm_ioremap_resource() results

devm_ioremap_resource() returns an error pointer, not NULL. Thus,
the result should be checked with IS_ERR().

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
10 years agoMAINTAINERS: update maintainer entry for Exynos DP driver
Jingoo Han [Thu, 10 Apr 2014 11:24:03 +0000 (20:24 +0900)]
MAINTAINERS: update maintainer entry for Exynos DP driver

Recently, Exynos DP driver was moved from drivers/video/exynos/
directory to drivers/gpu/drm/exynos/ directory. So, I update
and add maintainer entry for Exynos DP driver.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
10 years agodrm/exynos: balance framebuffer refcount
Andrzej Hajda [Tue, 15 Apr 2014 13:33:01 +0000 (15:33 +0200)]
drm/exynos: balance framebuffer refcount

exynos_drm_crtc_mode_set assigns primary framebuffer to plane without
taking reference. Then during framebuffer removal it is dereferenced twice,
causing oops. The patch fixes it.

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
10 years agoMerge branch 'vmwgfx-fixes-3.15' of git://people.freedesktop.org/~thomash/linux into...
Dave Airlie [Tue, 29 Apr 2014 23:43:43 +0000 (09:43 +1000)]
Merge branch 'vmwgfx-fixes-3.15' of git://people.freedesktop.org/~thomash/linux into drm-next

single security fix, cc'd stable.

* 'vmwgfx-fixes-3.15' of git://people.freedesktop.org/~thomash/linux:
  drm/vmwgfx: Make sure user-space can't DMA across buffer object boundaries v2

10 years agoALSA: hda - Suppress CORBRP clear on Nvidia controller chips
Takashi Iwai [Tue, 29 Apr 2014 16:38:21 +0000 (18:38 +0200)]
ALSA: hda - Suppress CORBRP clear on Nvidia controller chips

The recent commit (ca460f86521) changed the CORB RP reset procedure to
follow the specification with a couple of sanity checks.
Unfortunately, Nvidia controller chips seem not following this way,
and spew the warning messages like:
  snd_hda_intel 0000:00:10.1: CORB reset timeout#1, CORBRP = 0

This patch adds the workaround for such chips.  It just skips the new
reset procedure for the known broken chips.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
10 years agoMerge tag 'trace-fixes-v3.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Mon, 28 Apr 2014 23:57:51 +0000 (16:57 -0700)]
Merge tag 'trace-fixes-v3.15-rc2' of git://git./linux/kernel/git/rostedt/linux-trace

Pull ftrace bugfix from Steven Rostedt:
 "Takao Indoh reported that he was able to cause a ftrace bug while
  loading a module and enabling function tracing at the same time.

  He uncovered a race where the module when loaded will convert the
  calls to mcount into nops, and expects the module's text to be RW.
  But when function tracing is enabled, it will convert all kernel text
  (core and module) from RO to RW to convert the nops to calls to ftrace
  to record the function.  After the convertion, it will convert all the
  text back from RW to RO.

  The issue is, it will also convert the module's text that is loading.
  If it converts it to RO before ftrace does its conversion, it will
  cause ftrace to fail and require a reboot to fix it again.

  This patch moves the ftrace module update that converts calls to
  mcount into nops to be done when the module state is still
  MODULE_STATE_UNFORMED.  This will ignore the module when the text is
  being converted from RW back to RO"

* tag 'trace-fixes-v3.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  ftrace/module: Hardcode ftrace_module_init() call into load_module()

10 years agoMerge tag 'dt-for-linus' of git://git.secretlab.ca/git/linux
Linus Torvalds [Mon, 28 Apr 2014 22:19:06 +0000 (15:19 -0700)]
Merge tag 'dt-for-linus' of git://git.secretlab.ca/git/linux

Pull devicetree bug fixes from Grant Likely:
 "These are some important bug fixes that need to get into v3.15.

  This branch contains a pair of important bug fixes for the DT code:

   - Fix some incorrect binding property names before they enter common
     usage

   - Fix bug where some platform devices will be unable to get their
     interrupt number when they depend on an interrupt controller that
     is not available at device creation time.  This is a problem
     causing mainline to fail on a number of ARM platforms"

* tag 'dt-for-linus' of git://git.secretlab.ca/git/linux:
  of/irq: do irq resolution in platform_get_irq
  of: selftest: add deferred probe interrupt test
  dt: Fix binding typos in clock-names and interrupt-names

10 years agoMerge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
Linus Torvalds [Mon, 28 Apr 2014 21:58:15 +0000 (14:58 -0700)]
Merge branch 'merge' of git://git./linux/kernel/git/benh/powerpc

Pull powerpc fixes from Ben Herrenschmidt:
 "Here is a bunch of post-merge window fixes that have been accumulating
  in patchwork while I was on vacation or buried under other stuff last
  week.

  We have the now usual batch of LE fixes from Anton (sadly some new
  stuff that went into this merge window had endian issues, we'll try to
  make sure we do better next time)

  Some fixes and cleanups to the new 24x7 performance monitoring stuff
  (mostly typos and cleaning up printk's)

  A series of fixes for an issue with our runlatch bit, which wasn't set
  properly for offlined threads/cores and under KVM, causing potentially
  some counters to misbehave along with possible power management
  issues.

  A fix for kexec nasty race where the new kernel wouldn't "see" the
  secondary processors having reached back into firmware in time.

  And finally a few other misc (and pretty simple) bug fixes"

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (33 commits)
  powerpc/4xx: Fix section mismatch in ppc4xx_pci.c
  ppc/kvm: Clear the runlatch bit of a vcpu before napping
  ppc/kvm: Set the runlatch bit of a CPU just before starting guest
  ppc/powernv: Set the runlatch bits correctly for offline cpus
  powerpc/pseries: Protect remove_memory() with device hotplug lock
  powerpc: Fix error return in rtas_flash module init
  powerpc: Bump BOOT_COMMAND_LINE_SIZE to 2048
  powerpc: Bump COMMAND_LINE_SIZE to 2048
  powerpc: Rename duplicate COMMAND_LINE_SIZE define
  powerpc/perf/hv-24x7: Catalog version number is be64, not be32
  powerpc/perf/hv-24x7: Remove [static 4096], sparse chokes on it
  powerpc/perf/hv-24x7: Use (unsigned long) not (u32) values when calling plpar_hcall_norets()
  powerpc/perf/hv-gpci: Make device attr static
  powerpc/perf/hv_gpci: Probe failures use pr_debug(), and padding reduced
  powerpc/perf/hv_24x7: Probe errors changed to pr_debug(), padding fixed
  powerpc/mm: Fix tlbie to add AVAL fields for 64K pages
  powerpc/powernv: Fix little endian issues in OPAL dump code
  powerpc/powernv: Create OPAL sglist helper functions and fix endian issues
  powerpc/powernv: Fix little endian issues in OPAL error log code
  powerpc/powernv: Fix little endian issues with opal_do_notifier calls
  ...

10 years agomm: don't pointlessly use BUG_ON() for sanity check
Linus Torvalds [Mon, 28 Apr 2014 21:24:09 +0000 (14:24 -0700)]
mm: don't pointlessly use BUG_ON() for sanity check

BUG_ON() is a big hammer, and should be used _only_ if there is some
major corruption that you cannot possibly recover from, making it
imperative that the current process (and possibly the whole machine) be
terminated with extreme prejudice.

The trivial sanity check in the vmacache code is *not* such a fatal
error.  Recovering from it is absolutely trivial, and using BUG_ON()
just makes it harder to debug for no actual advantage.

To make matters worse, the placement of the BUG_ON() (only if the range
check matched) actually makes it harder to hit the sanity check to begin
with, so _if_ there is a bug (and we just got a report from Srivatsa
Bhat that this can indeed trigger), it is harder to debug not just
because the machine is possibly dead, but because we don't have better
coverage.

BUG_ON() must *die*.  Maybe we should add a checkpatch warning for it,
because it is simply just about the worst thing you can ever do if you
hit some "this cannot happen" situation.

Reported-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Davidlohr Bueso <davidlohr@hp.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agoftrace/module: Hardcode ftrace_module_init() call into load_module()
Steven Rostedt (Red Hat) [Thu, 24 Apr 2014 14:40:12 +0000 (10:40 -0400)]
ftrace/module: Hardcode ftrace_module_init() call into load_module()

A race exists between module loading and enabling of function tracer.

CPU 1 CPU 2
----- -----
  load_module()
   module->state = MODULE_STATE_COMING

register_ftrace_function()
 mutex_lock(&ftrace_lock);
 ftrace_startup()
  update_ftrace_function();
   ftrace_arch_code_modify_prepare()
    set_all_module_text_rw();
   <enables-ftrace>
    ftrace_arch_code_modify_post_process()
     set_all_module_text_ro();

[ here all module text is set to RO,
  including the module that is
  loading!! ]

   blocking_notifier_call_chain(MODULE_STATE_COMING);
    ftrace_init_module()

     [ tries to modify code, but it's RO, and fails!
       ftrace_bug() is called]

When this race happens, ftrace_bug() will produces a nasty warning and
all of the function tracing features will be disabled until reboot.

The simple solution is to treate module load the same way the core
kernel is treated at boot. To hardcode the ftrace function modification
of converting calls to mcount into nops. This is done in init/main.c
there's no reason it could not be done in load_module(). This gives
a better control of the changes and doesn't tie the state of the
module to its notifiers as much. Ftrace is special, it needs to be
treated as such.

The reason this would work, is that the ftrace_module_init() would be
called while the module is in MODULE_STATE_UNFORMED, which is ignored
by the set_all_module_text_ro() call.

Link: http://lkml.kernel.org/r/1395637826-3312-1-git-send-email-indou.takao@jp.fujitsu.com
Reported-by: Takao Indoh <indou.takao@jp.fujitsu.com>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: stable@vger.kernel.org # 2.6.38+
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
10 years agoALSA: hda - add headset mic detect quirk for a Dell laptop
Hui Wang [Mon, 28 Apr 2014 06:45:00 +0000 (14:45 +0800)]
ALSA: hda - add headset mic detect quirk for a Dell laptop

When we plug a 3-ring headset on the Dell machine (VID: 0x10ec0255,
SID: 0x10280674), the headset mic can't be detected, after apply this
patch, the headset mic can work well.

BugLink: https://bugs.launchpad.net/bugs/1297581
Cc: David Henningsson <david.henningsson@canonical.com>
Cc: stable@vger.kernel.org
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
10 years agoMerge tag 'asoc-v3.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie...
Takashi Iwai [Mon, 28 Apr 2014 10:00:36 +0000 (12:00 +0200)]
Merge tag 'asoc-v3.15-rc2' of git://git./linux/kernel/git/broonie/sound into for-linus

ASoC: Fixes for v3.15

A smattering of driver-specific fixes here, nothing generic.  The Cirrus
CODEC conversions to devm_ are leak fixes - the conversion adds missing
error handling code.

10 years agopowerpc/4xx: Fix section mismatch in ppc4xx_pci.c
Alistair Popple [Tue, 8 Apr 2014 04:20:19 +0000 (14:20 +1000)]
powerpc/4xx: Fix section mismatch in ppc4xx_pci.c

This patch fixes this section mismatch:

WARNING: vmlinux.o(.text+0x1efc4): Section mismatch in reference from
the function apm821xx_pciex_init_port_hw() to the function
.init.text:ppc4xx_pciex_wait_on_sdr.isra.9()

The function apm821xx_pciex_init_port_hw() references the function
__init ppc4xx_pciex_wait_on_sdr.isra.9().  This is often because
apm821xx_pciex_init_port_hw lacks a __init annotation or the
annotation of ppc4xx_pciex_wait_on_sdr.isra.9 is wrong.

apm821xx_pciex_init_port_hw is only referenced by a struct in
__initdata, so it should be safe to add __init to
apm821xx_pciex_init_port_hw.

Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
10 years agoppc/kvm: Clear the runlatch bit of a vcpu before napping
Preeti U Murthy [Fri, 11 Apr 2014 10:32:08 +0000 (16:02 +0530)]
ppc/kvm: Clear the runlatch bit of a vcpu before napping

When the guest cedes the vcpu or the vcpu has no guest to
run it naps. Clear the runlatch bit of the vcpu before
napping to indicate an idle cpu.

Signed-off-by: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Acked-by: Paul Mackerras <paulus@samba.org>
Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
10 years agoppc/kvm: Set the runlatch bit of a CPU just before starting guest
Preeti U Murthy [Fri, 11 Apr 2014 10:31:58 +0000 (16:01 +0530)]
ppc/kvm: Set the runlatch bit of a CPU just before starting guest

The secondary threads in the core are kept offline before launching guests
in kvm on powerpc: "371fefd6f2dc4666:KVM: PPC: Allow book3s_hv guests to use
SMT processor modes."

Hence their runlatch bits are cleared. When the secondary threads are called
in to start a guest, their runlatch bits need to be set to indicate that they
are busy. The primary thread has its runlatch bit set though, but there is no
harm in setting this bit once again. Hence set the runlatch bit for all
threads before they start guest.

Signed-off-by: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Acked-by: Paul Mackerras <paulus@samba.org>
Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
10 years agoppc/powernv: Set the runlatch bits correctly for offline cpus
Preeti U Murthy [Fri, 11 Apr 2014 10:31:48 +0000 (16:01 +0530)]
ppc/powernv: Set the runlatch bits correctly for offline cpus

Up until now we have been setting the runlatch bits for a busy CPU and
clearing it when a CPU enters idle state. The runlatch bit has thus
been consistent with the utilization of a CPU as long as the CPU is online.

However when a CPU is hotplugged out the runlatch bit is not cleared. It
needs to be cleared to indicate an unused CPU. Hence this patch has the
runlatch bit cleared for an offline CPU just before entering an idle state
and sets it immediately after it exits the idle state.

Signed-off-by: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Acked-by: Paul Mackerras <paulus@samba.org>
Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
10 years agopowerpc/pseries: Protect remove_memory() with device hotplug lock
Li Zhong [Thu, 10 Apr 2014 08:25:31 +0000 (16:25 +0800)]
powerpc/pseries: Protect remove_memory() with device hotplug lock

While testing memory hot-remove, I found following dead lock:

Process #1141 is drmgr, trying to remove some memory, i.e. memory499.
It holds the memory_hotplug_mutex, and blocks when trying to remove file
"online" under dir memory499, in kernfs_drain(), at
        wait_event(root->deactivate_waitq,
                   atomic_read(&kn->active) == KN_DEACTIVATED_BIAS);

Process #1120 is trying to online memory499 by
   echo 1 > memory499/online

In .kernfs_fop_write, it uses kernfs_get_active() to increase
&kn->active, thus blocking process #1141. While itself is blocked later
when trying to acquire memory_hotplug_mutex, which is held by process

The backtrace of both processes are shown below:

[<c000000001b18600>] 0xc000000001b18600
[<c000000000015044>] .__switch_to+0x144/0x200
[<c000000000263ca4>] .online_pages+0x74/0x7b0
[<c00000000055b40c>] .memory_subsys_online+0x9c/0x150
[<c00000000053cbe8>] .device_online+0xb8/0x120
[<c00000000053cd04>] .online_store+0xb4/0xc0
[<c000000000538ce4>] .dev_attr_store+0x64/0xa0
[<c00000000030f4ec>] .sysfs_kf_write+0x7c/0xb0
[<c00000000030e574>] .kernfs_fop_write+0x154/0x1e0
[<c000000000268450>] .vfs_write+0xe0/0x260
[<c000000000269144>] .SyS_write+0x64/0x110
[<c000000000009ffc>] syscall_exit+0x0/0x7c

[<c000000001b18600>] 0xc000000001b18600
[<c000000000015044>] .__switch_to+0x144/0x200
[<c00000000030be14>] .__kernfs_remove+0x204/0x300
[<c00000000030d428>] .kernfs_remove_by_name_ns+0x68/0xf0
[<c00000000030fb38>] .sysfs_remove_file_ns+0x38/0x60
[<c000000000539354>] .device_remove_attrs+0x54/0xc0
[<c000000000539fd8>] .device_del+0x158/0x250
[<c00000000053a104>] .device_unregister+0x34/0xa0
[<c00000000055bc14>] .unregister_memory_section+0x164/0x170
[<c00000000024ee18>] .__remove_pages+0x108/0x4c0
[<c00000000004b590>] .arch_remove_memory+0x60/0xc0
[<c00000000026446c>] .remove_memory+0x8c/0xe0
[<c00000000007f9f4>] .pseries_remove_memblock+0xd4/0x160
[<c00000000007fcfc>] .pseries_memory_notifier+0x27c/0x290
[<c0000000008ae6cc>] .notifier_call_chain+0x8c/0x100
[<c0000000000d858c>] .__blocking_notifier_call_chain+0x6c/0xe0
[<c00000000071ddec>] .of_property_notify+0x7c/0xc0
[<c00000000071ed3c>] .of_update_property+0x3c/0x1b0
[<c0000000000756cc>] .ofdt_write+0x3dc/0x740
[<c0000000002f60fc>] .proc_reg_write+0xac/0x110
[<c000000000268450>] .vfs_write+0xe0/0x260
[<c000000000269144>] .SyS_write+0x64/0x110
[<c000000000009ffc>] syscall_exit+0x0/0x7c

This patch uses lock_device_hotplug() to protect remove_memory() called
in pseries_remove_memblock(), which is also stated before function
remove_memory():

 * NOTE: The caller must call lock_device_hotplug() to serialize hotplug
 * and online/offline operations before this call, as required by
 * try_offline_node().
 */
void __ref remove_memory(int nid, u64 start, u64 size)

With this lock held, the other process(#1120 above) trying to online the
memory block will retry the system call when calling
lock_device_hotplug_sysfs(), and finally find No such device error.

Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
10 years agopowerpc: Fix error return in rtas_flash module init
Anton Blanchard [Mon, 14 Apr 2014 11:23:32 +0000 (21:23 +1000)]
powerpc: Fix error return in rtas_flash module init

module_init should return 0 or a negative errno.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
10 years agopowerpc: Bump BOOT_COMMAND_LINE_SIZE to 2048
Anton Blanchard [Mon, 14 Apr 2014 11:55:25 +0000 (21:55 +1000)]
powerpc: Bump BOOT_COMMAND_LINE_SIZE to 2048

Bump the boot wrapper BOOT_COMMAND_LINE_SIZE to match the
kernel.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
10 years agopowerpc: Bump COMMAND_LINE_SIZE to 2048
Anton Blanchard [Mon, 14 Apr 2014 11:54:52 +0000 (21:54 +1000)]
powerpc: Bump COMMAND_LINE_SIZE to 2048

I've had a report that the current limit is too small for
an automated network based installer. Bump it.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
10 years agopowerpc: Rename duplicate COMMAND_LINE_SIZE define
Anton Blanchard [Mon, 14 Apr 2014 11:54:05 +0000 (21:54 +1000)]
powerpc: Rename duplicate COMMAND_LINE_SIZE define

We have two definitions of COMMAND_LINE_SIZE, one for the kernel
and one for the boot wrapper. I assume this is so the boot
wrapper can be self sufficient and not rely on kernel headers.

Having two defines with the same name is confusing, I just
updated the wrong one when trying to bump it.

Make the boot wrapper define unique by calling it
BOOT_COMMAND_LINE_SIZE.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
10 years agopowerpc/perf/hv-24x7: Catalog version number is be64, not be32
Cody P Schafer [Tue, 15 Apr 2014 17:10:55 +0000 (10:10 -0700)]
powerpc/perf/hv-24x7: Catalog version number is be64, not be32

The catalog version number was changed from a be32 (with proceeding
32bits of padding) to a be64, update the code to treat it as a be64

Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
10 years agopowerpc/perf/hv-24x7: Remove [static 4096], sparse chokes on it
Cody P Schafer [Tue, 15 Apr 2014 17:10:54 +0000 (10:10 -0700)]
powerpc/perf/hv-24x7: Remove [static 4096], sparse chokes on it

Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
10 years agopowerpc/perf/hv-24x7: Use (unsigned long) not (u32) values when calling plpar_hcall_n...
Cody P Schafer [Tue, 15 Apr 2014 17:10:53 +0000 (10:10 -0700)]
powerpc/perf/hv-24x7: Use (unsigned long) not (u32) values when calling plpar_hcall_norets()

Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
10 years agopowerpc/perf/hv-gpci: Make device attr static
Cody P Schafer [Tue, 15 Apr 2014 17:10:52 +0000 (10:10 -0700)]
powerpc/perf/hv-gpci: Make device attr static

Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
10 years agopowerpc/perf/hv_gpci: Probe failures use pr_debug(), and padding reduced
Cody P Schafer [Tue, 15 Apr 2014 17:10:51 +0000 (10:10 -0700)]
powerpc/perf/hv_gpci: Probe failures use pr_debug(), and padding reduced

fixup for "powerpc/perf: Add support for the hv gpci (get performance
counter info) interface".

Makes the "not enabled" message less awful (and hidden unless
debugging).

Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
10 years agopowerpc/perf/hv_24x7: Probe errors changed to pr_debug(), padding fixed
Cody P Schafer [Tue, 15 Apr 2014 17:10:50 +0000 (10:10 -0700)]
powerpc/perf/hv_24x7: Probe errors changed to pr_debug(), padding fixed

fixup for "powerpc/perf: Add support for the hv 24x7 interface"

Makes the "not enabled" message less awful (and hides it in most cases).

Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
10 years agopowerpc/mm: Fix tlbie to add AVAL fields for 64K pages
Aneesh Kumar K.V [Mon, 21 Apr 2014 05:07:36 +0000 (10:37 +0530)]
powerpc/mm: Fix tlbie to add AVAL fields for 64K pages

The if condition check was based on a draft ISA doc. Remove the same.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
10 years agopowerpc/powernv: Fix little endian issues in OPAL dump code
Anton Blanchard [Tue, 22 Apr 2014 05:01:27 +0000 (15:01 +1000)]
powerpc/powernv: Fix little endian issues in OPAL dump code

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
10 years agopowerpc/powernv: Create OPAL sglist helper functions and fix endian issues
Anton Blanchard [Tue, 22 Apr 2014 05:01:26 +0000 (15:01 +1000)]
powerpc/powernv: Create OPAL sglist helper functions and fix endian issues

We have two copies of code that creates an OPAL sg list. Consolidate
these into a common set of helpers and fix the endian issues.

The flash interface embedded a version number in the num_entries
field, whereas the dump interface did did not. Since versioning
wasn't added to the flash interface and it is impossible to add
this in a backwards compatible way, just remove it.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
10 years agopowerpc/powernv: Fix little endian issues in OPAL error log code
Anton Blanchard [Tue, 22 Apr 2014 05:01:25 +0000 (15:01 +1000)]
powerpc/powernv: Fix little endian issues in OPAL error log code

Fix little endian issues with the OPAL error log code.

Signed-off-by: Anton Blanchard <anton@samba.org>
Reviewed-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
10 years agopowerpc/powernv: Fix little endian issues with opal_do_notifier calls
Anton Blanchard [Tue, 22 Apr 2014 05:01:24 +0000 (15:01 +1000)]
powerpc/powernv: Fix little endian issues with opal_do_notifier calls

The bitmap in opal_poll_events and opal_handle_interrupt is
big endian, so we need to byteswap it on little endian builds.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
10 years agopowerpc/powernv: Remove some OPAL function declaration duplication
Anton Blanchard [Tue, 22 Apr 2014 05:01:23 +0000 (15:01 +1000)]
powerpc/powernv: Remove some OPAL function declaration duplication

We had some duplication of the internal OPAL functions.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
10 years agopowerpc/powernv: Use uint64_t instead of size_t in OPAL APIs
Anton Blanchard [Tue, 22 Apr 2014 05:01:22 +0000 (15:01 +1000)]
powerpc/powernv: Use uint64_t instead of size_t in OPAL APIs

Using size_t in our APIs is asking for trouble, especially
when some OPAL calls use size_t pointers.

Signed-off-by: Anton Blanchard <anton@samba.org>
Reviewed-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
10 years agopowerpc/powernv: Release the refcount for pci_dev
Wei Yang [Wed, 23 Apr 2014 02:26:33 +0000 (10:26 +0800)]
powerpc/powernv: Release the refcount for pci_dev

On PowerNV platform, we are holding an unnecessary refcount on a pci_dev, which
leads to the pci_dev is not destroyed when hotplugging a pci device.

This patch release the unnecessary refcount.

Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>