Commit Graph

53962 Commits

Author SHA1 Message Date
Paulo Zanoni
374a868a72 drm: add drm_mode_cea_vic
This function returns the VIC of the mode. This value can be used when
creating AVI InfoFrames.

Cc: Thierry Reding <thierry.reding@avionic-design.de>
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=50371
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Thierry Reding <thierry.reding@avionic-design.de>
Acked-by: Dave Airlie <airlied@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-11-29 11:42:37 +01:00
Maarten Lankhorst
654aa79259 drm/ttm: alter cpu_writers to return -EBUSY in ttm_execbuf_util reservations
This is similar to other platforms that don't allow command submission
to buffers locked on the cpu.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-11-20 16:17:35 +10:00
Thomas Hellstrom
cdad05216c drm/ttm, drm/vmwgfx: Use RCU locking for object lookups v3
The mostly used lookup+get put+potential_destroy path of TTM objects
is converted to use RCU locks. This will substantially decrease the amount
of locked bus cycles during normal operation.
Since we use kfree_rcu to free the objects, no rcu synchronization is needed
at module unload time.

v2: Don't touch include/linux/kref.h
v3: Adapt to kref_get_unless_zero return value change

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-11-20 16:15:05 +10:00
Thomas Hellstrom
4b20db3de8 kref: Implement kref_get_unless_zero v3
This function is intended to simplify locking around refcounting for
objects that can be looked up from a lookup structure, and which are
removed from that lookup structure in the object destructor.
Operations on such objects require at least a read lock around
lookup + kref_get, and a write lock around kref_put + remove from lookup
structure. Furthermore, RCU implementations become extremely tricky.
With a lookup followed by a kref_get_unless_zero *with return value check*
locking in the kref_put path can be deferred to the actual removal from
the lookup structure and RCU lookups become trivial.

v2: Formatting fixes.
v3: Invert the return value.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-11-20 16:15:02 +10:00
Maarten Lankhorst
dedfdffd44 drm/ttm: remove sync_arg from driver functions
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Reviewed-By: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-11-20 16:10:10 +10:00
Maarten Lankhorst
b03640b1de drm/ttm: remove sync_obj_arg from ttm_bo_move_accel_cleanup
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Reviewed-By: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-11-20 16:10:02 +10:00
Maarten Lankhorst
5fb4ef0e36 drm/ttm: remove sync_obj_arg member
vmwgfx was its only user and always sets it to the same..

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Reviewed-By: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-11-20 16:09:55 +10:00
Marcin Slusarz
91926741ec drm/ttm: remove ttm_mem_global->queue
It's unused.

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-11-20 16:06:22 +10:00
Marcin Slusarz
830e2837f5 drm/ttm: remove ttm_bo_device->nice_mode
It's unused.

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-11-20 16:06:21 +10:00
Marcin Slusarz
0b91c4a1cd drm/ttm: remove ttm_buffer_object->buffer_start
All drivers set it to 0 and nothing uses it.

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-11-20 16:06:19 +10:00
Imre Deak
c61eef726a drm: add support for monotonic vblank timestamps
Jumps in the vblank and page flip event timestamps cause trouble for
clients, so we should avoid them. The timestamp we get currently with
gettimeofday can jump, so use instead monotonic timestamps.

For backward compatibility use a module flag to revert back to using
gettimeofday timestamps. Add also a DRM_CAP_TIMESTAMP_MONOTONIC flag
that is simply a read only version of the module flag, so that clients
can query this without depending on sysfs.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-11-20 16:06:16 +10:00
Daniel Vetter
905bc9ff65 drm: don't start the poll engine in probe_single_connector
Actually there's a reason this stuff is there, and it's called

commit e58f637bb9
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Fri Aug 20 09:13:36 2010 +0100

    drm/kms: Add a module parameter to disable polling

The idea has been that users can enable/disable polling at runtime. So
the quick hack has been to just re-enable the output polling if xrandr
asks for the latest state of the connectors.

The problem with that hack is that when we force connectors to another
state than what would be detected, we nicely ping-pong:
- Userspace calls probe, gets the forced state, but polling starts
  again.
- Polling notices that the state is actually different, wakes up
  userspace.
- Repeat.

As that commit already explains, the right fix would be to make the
locking more fine-grained, so that hotplug detection on one output
does not interfere with cursor updates on another crtc.

But that is way too much work. So let's just safe this gross hack by
caching the last-seen state of drm_kms_helper_poll for that driver,
and only fire up the poll engine again if it changed from off to on.

v2: Fixup the edge detection of drm_kms_helper_poll.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=49907
Tested-by: Tvrtko Ursulin <tvrtko.ursulin@onelan.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-11-20 15:51:17 +10:00
Daniel Vetter
69787f7da6 drm: run the hpd irq event code directly
All drivers already have a work item to run the hpd code, so we don't
need to launch a new one in the helper code. Dave Airlie mentioned
that the cancel+re-queue might paper over DP related hpd ping-pongs,
hence why this is split out.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-11-20 15:50:57 +10:00
Daniel Vetter
816da85a09 drm: handle HPD and polled connectors separately
Instead of reusing the polling code for hpd handling, split them up.
This has a few consequences:
- Don't touch HPD capable connectors in the poll loop.
- Only touch HPD capable connectors in drm_helper_hpd_irq_event.
- We could run the HPD handling directly (because all callers already
  use their own work item), but for easier bisect that happens in it's
  own patch.

The ultimate goal is that drivers grow some smarts about which
connectors have received a hotplug event and only call the detect code
of that connector. But that's a second step.

v2: s/hdp/hpd/, noticed by Adam Jackson. I can't type.

v3: Split out the work item removal as requested by Dave Airlie. This
results in a temporary mode_config.hpd_irq_work item to keep things
the same.

v4: In the hpd_irq_event handler don't bail out if other bits than HPD
are set. This is useful where e.g. hpd is unreliably, but mostly
works. Drivers can then set both HPD and POLL flags, and users get the
best of both worlds: Quick hotplug feedback if the hpd works, but
still reliable detection with the polling. The poll loop already works
the same, and doesn't bail if HPD is set.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-11-20 15:50:42 +10:00
Daniel Vetter
3d3683f04a drm: extract drm_kms_helper_hotplug_event
Useful if drivers want to be slightly more clever about hotplug
handling.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-11-20 15:50:32 +10:00
Rob Clark
c6eefa1750 drm: add drm_send_vblank_event() helper (v5)
A helper that drivers can use to send vblank event after a pageflip.
If the driver doesn't support proper vblank irq based time/seqn then
just pass -1 for the pipe # to get do_gettimestamp() behavior (since
there are a lot of drivers that don't use drm_vblank_count_and_time())

Also an internal send_vblank_event() helper for the various other code
paths within drm_irq that also need to send vblank events.

v1: original
v2: add back 'vblwait->reply.sequence = seq' which should not have
    been deleted
v3: add WARN_ON() in case lock is not held and comments
v4: use WARN_ON_SMP() instead to fix issue with !SMP && !DEBUG_SPINLOCK
    as pointed out by Marcin Slusarz
v5: update docbook

Signed-off-by: Rob Clark <rob@ti.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-11-20 15:47:21 +10:00
Stephane Marchesin
a4799037c3 drm: get cea video id code for a given display mode
This patch adds support for getting CEA Video ID Code for a given
display mode after matching with edid_cea_modes list. Its index in
the list added with one, gives the desired code.

This exported function will be used by hdmi drivers for composing
AVI info frame data.

Signed-off-by: Stephane Marchesin <marcheu@chromium.org>
Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-11-20 15:36:56 +10:00
Dave Airlie
9fabd4eede Merge branch 'for-airlied' of git://people.freedesktop.org/~danvet/drm-intel into drm-next
Daniel writes:
Highlights of this -next round:
- ivb fdi B/C fixes
- hsw sprite/plane offset fixes from Damien
- unified dp/hdmi encoder for hsw, finally external dp support on hsw
  (Paulo)
- kill-agp and some other prep work in the gtt code from Ben
- some fb handling fixes from Ville
- massive pile of patches to align hsw VGA with the spec and make it
  actually work (Paulo)
- pile of workarounds from Jesse, mostly for vlv, but also some other
  related platforms
- start of a dev_priv reorg, that thing grew out of bounds and chaotic
- small bits&pieces all over the place, down to better error handling for
  load-detect on gen2 (Chris, Jani, Mika, Zhenyu, ...)

On top of the previous pile (just copypasta):
- tons of hsw dp prep patches form Paulo
- round scheduled work items and timers to nearest second (Chris)
- some hw workarounds (Jesse&Damien)
- vlv dp support and related fixups (Vijay et al.)
- basic haswell dp support, not yet wired up for external ports (Paulo)
- edp support (Paulo)
- tons of refactorings to prepare for the above (Paulo)
- panel rework, unifiying code between lvds and edp panels (Jani)
- panel fitter scaling modes (Jani + Yuly Novikov)
- panel power improvements, should now work without the BIOS setting it up
- extracting some dp helpers from radeon/i915 and move them to
  drm_dp_helper.c
- randome pile of workarounds (Damien, Ben, ...)
- some cleanups for the register restore code for suspend/resume
- secure batchbuffer support, should enable tear-free blits on gen6+
  Chris)
- random smaller fixlets and cleanups.

* 'for-airlied' of git://people.freedesktop.org/~danvet/drm-intel: (231 commits)
  drm/i915: Restore physical HWS_PGA after resume
  drm/i915: Report amount of usable graphics memory in MiB
  drm/i915/i2c: Track users of GMBUS force-bit
  drm/i915: Allocate the proper size for contexts.
  drm/i915: Update load-detect failure paths for modeset-rework
  drm/i915: Clear unused fields of mode for framebuffer creation
  drm/i915: Always calculate 8xx WM values based on a 32-bpp framebuffer
  drm/i915: Fix sparse warnings in from AGP kill code
  drm/i915: Missed lock change with rps lock
  drm/i915: Move the remaining gtt code
  drm/i915: flush system agent TLBs on SNB
  drm/i915: Kill off now unused gen6+ AGP code
  drm/i915: Calculate correct stolen size for GEN7+
  drm/i915: Stop using AGP layer for GEN6+
  drm/i915: drop the double-OP_STOREDW usage in blt_ring_flush
  drm/i915: don't rewrite the GTT on resume v4
  drm/i915: protect RPS/RC6 related accesses (including PCU) with a new mutex
  drm/i915: put ring frequency and turbo setup into a work queue v5
  drm/i915: don't block resume on fb console resume v2
  drm/i915: extract l3_parity substruct from dev_priv
  ...
2012-11-20 09:22:35 +10:00
Ben Widawsky
009946f89b drm/i915: Kill off now unused gen6+ AGP code
v2: Accidently removed an ILK case in i9xx_setup (Nicely found by Chris)

CC: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by [v1] : Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-11-11 23:51:43 +01:00
Ben Widawsky
e76e9aebcd drm/i915: Stop using AGP layer for GEN6+
As a quick hack we make the old intel_gtt structure mutable so we can
fool a bunch of the existing code which depends on elements in that data
structure. We can/should try to remove this in a subsequent patch.

This should preserve the old gtt init behavior which upon writing these
patches seems incorrect. The next patch will fix these things.

The one exception is VLV which doesn't have the preserved flush control
write behavior. Since we want to do that for all GEN6+ stuff, we'll
handle that in a later patch. Mainstream VLV support doesn't actually
exist yet anyway.

v2: Update the comment to remove the "voodoo"
Check that the last pte written matches what we readback

v3: actually kill cache_level_to_agp_type since most of the flags will
disappear in an upcoming patch

v4: v3 was actually not what we wanted (Daniel)
Make the ggtt bind assertions better and stricter (Chris)
Fix some uncaught errors at gtt init (Chris)
Some other random stuff that Chris wanted

v5: check for i==0 in gen6_ggtt_bind_object to shut up gcc (Ben)

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by [v4]: Chris Wilson <chris@chris-wilson.co.uk>
[danvet: Make the cache_level -> agp_flags conversion for pre-gen6 a
tad more robust by mapping everything != CACHE_NONE to the cached agp
flag - we have a 1:1 uncached mapping, but different modes of
cacheable (at least on later generations). Suggested by Chris Wilson.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-11-11 23:51:42 +01:00
Daniel Vetter
cfc1a06206 drm: add helper to sort panels to the head of the connector list
Userspace seems to like this, see

commit cb0953d734
Author: Adam Jackson <ajax@redhat.com>
Date:   Fri Jul 16 14:46:29 2010 -0400

    drm/i915: Initialize LVDS and eDP outputs before anything else

    This makes them sort to the front in X, which makes them likely to be
    the primary outputs if you haven't specified a preference in your DE,
    which is likely to be what you want.

    Signed-off-by: Adam Jackson <ajax@redhat.com>
    Signed-off-by: Eric Anholt <eric@anholt.net>

Sorting the connector list after the fact is much easier than trying
to be clever with the init sequence.

Acked-by: Dave Airlie <airlied@gmail.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-11-11 23:51:28 +01:00
Maarten Lankhorst
a9dbfff1cb drm/ttm: add ttm_bo_is_reserved
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-11-07 10:44:38 +10:00
Ville Syrjälä
0b3904ab2a drm: Constify some function arguments
None of drm_mode_debug_printmodeline(), drm_mode_equal(), drm_mode_width()
or drm_mode_height() change the mode passed in, so make the arguments
const.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-11-07 10:09:16 +10:00
Linus Torvalds
0f89a5733a Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:
 "First post-Sandy pull request"

 1) Fix antenna gain handling and initialization of chan->max_reg_power
    in wireless, from Felix Fietkau.

 2) Fix nexthop handling in H.232 conntrack helper, from Julian
    Anastasov.

 3) Only process 80211 mesh config header in certain kinds of frames,
    from Javier Cardona.

 4) 80211 management frame header length needs to be validated, from
    Johannes Berg.

 5) Don't access free'd SKBs in ath9k driver, from Felix Fietkay.

 6) Test for permanent state correctly in VXLAN driver, from Stephen
    Hemminger.

 7) BNX2X bug fixes from Yaniv Rosner and Dmitry Kravkov.

 8) Fix off by one errors in bonding, from Nikolay ALeksandrov.

 9) Fix divide by zero in TCP-Illinois congestion control.  From Jesper
    Dangaard Brouer.

10) TCP metrics code says "Yo dawg, I heard you like sizeof, so I did a
    sizeof of a sizeof, so you can size your size" Fix from Julian
    Anastasov.

11) Several drivers do mdiobus_free without first doing an
    mdiobus_unregister leading to stray pointer references.  Fix from
    Peter Senna Tschudin.

12) Fix OOPS in l2tp_eth_create() error path, it's another danling
    pointer kinda situation.  Fix from Tom Parkin.

13) Hardware driven by the vmxnet driver can't handle larger than 16K
    fragments, so split them up when necessary.  From Eric Dumazet.

14) Handle zero length data length in tcp_send_rcvq() properly.  Fix
    from Pavel Emelyanov.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (38 commits)
  tcp-repair: Handle zero-length data put in rcv queue
  vmxnet3: must split too big fragments
  l2tp: fix oops in l2tp_eth_create() error path
  cxgb4: Fix unable to get UP event from the LLD
  drivers/net/phy/mdio-bitbang.c: Call mdiobus_unregister before mdiobus_free
  drivers/net/ethernet/nxp/lpc_eth.c: Call mdiobus_unregister before mdiobus_free
  bnx2x: fix HW initialization using fw 7.8.x
  tcp: Fix double sizeof in new tcp_metrics code
  net: fix divide by zero in tcp algorithm illinois
  net: sctp: Fix typo in net/sctp
  bonding: fix second off-by-one error
  bonding: fix off-by-one error
  bnx2x: Disable FCoE for 57840 since not yet supported by FW
  bnx2x: Fix no link on 577xx 10G-baseT
  bnx2x: Fix unrecognized SFP+ module after driver is loaded
  bnx2x: Fix potential incorrect link speed provision
  bnx2x: Restore global registers back to default.
  bnx2x: Fix link down in 57712 following LFA
  bnx2x: Fix 57810 1G-KR link against certain switches.
  ixgbe: PTP get_ts_info missing software support
  ...
2012-11-02 20:48:41 -07:00
Linus Torvalds
66b6a0c979 Bug-fixes:
* Use appropriate macros instead of hand-rolling our own (ARM).
  * Fixes if FB/KBD closed unexpectedly.
  * Fix memory leak in /dev/gntdev ioctl calls.
  * Fix overflow check in xenbus_file_write.
  * Document cleanup.
  * Performance optimization when migrating guests.
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Merge tag 'stable/for-linus-3.7-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen

Pull Xen bugfixes from Konrad Rzeszutek Wilk:
 - Use appropriate macros instead of hand-rolling our own (ARM).
 - Fixes if FB/KBD closed unexpectedly.
 - Fix memory leak in /dev/gntdev ioctl calls.
 - Fix overflow check in xenbus_file_write.
 - Document cleanup.
 - Performance optimization when migrating guests.

* tag 'stable/for-linus-3.7-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen/mmu: Use Xen specific TLB flush instead of the generic one.
  xen/arm: use the __HVC macro
  xen/xenbus: fix overflow check in xenbus_file_write()
  xen-kbdfront: handle backend CLOSED without CLOSING
  xen-fbfront: handle backend CLOSED without CLOSING
  xen/gntdev: don't leak memory from IOCTL_GNTDEV_MAP_GRANT_REF
  x86: remove obsolete comment from asm/xen/hypervisor.h
2012-11-02 13:26:11 -07:00
Sasha Levin
d9b482c8ba hashtable: introduce a small and naive hashtable
This hashtable implementation is using hlist buckets to provide a simple
hashtable to prevent it from getting reimplemented all over the kernel.

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
[ Merging this now, so that subsystems can start applying Sasha's
  patches that use this   - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-11-02 12:44:51 -07:00
Linus Torvalds
8c23f406c6 Merge git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM fix from Marcelo Tosatti.

* git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: x86: fix vcpu->mmio_fragments overflow
2012-11-01 08:27:02 -07:00
Linus Torvalds
33046957cd Sound fixes for 3.7-rc4
This contains unexpectedly many changes in a wide range due to the
 fixes for races at disconnection of USB audio devices.  In the end,
 we end up covering fairly core parts of sound subsystem.
 
 Other than that, just a few usual small fixes.
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Merge tag 'sound-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "This contains unexpectedly many changes in a wide range due to the
  fixes for races at disconnection of USB audio devices.  In the end, we
  end up covering fairly core parts of sound subsystem.

  Other than that, just a few usual small fixes."

* tag 'sound-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: ice1724: Fix rate setup after resume
  ALSA: Avoid endless sleep after disconnect
  ALSA: Add a reference counter to card instance
  ALSA: usb-audio: Fix races at disconnection in mixer_quirks.c
  ALSA: usb-audio: Use rwsem for disconnect protection
  ALSA: usb-audio: Fix races at disconnection
  ALSA: PCM: Fix some races at disconnection
  ASoC: omap-dmic: Correct functional clock name
  ASoC: zoom2: Fix compile error by including correct header files
  ALSA: hda - Fix mute-LED setup for HP dv5 laptop
2012-10-31 15:38:32 -07:00
Xiao Guangrong
87da7e66a4 KVM: x86: fix vcpu->mmio_fragments overflow
After commit b3356bf0db (KVM: emulator: optimize "rep ins" handling),
the pieces of io data can be collected and write them to the guest memory
or MMIO together

Unfortunately, kvm splits the mmio access into 8 bytes and store them to
vcpu->mmio_fragments. If the guest uses "rep ins" to move large data, it
will cause vcpu->mmio_fragments overflow

The bug can be exposed by isapc (-M isapc):

[23154.818733] general protection fault: 0000 [#1] SMP DEBUG_PAGEALLOC
[ ......]
[23154.858083] Call Trace:
[23154.859874]  [<ffffffffa04f0e17>] kvm_get_cr8+0x1d/0x28 [kvm]
[23154.861677]  [<ffffffffa04fa6d4>] kvm_arch_vcpu_ioctl_run+0xcda/0xe45 [kvm]
[23154.863604]  [<ffffffffa04f5a1a>] ? kvm_arch_vcpu_load+0x17b/0x180 [kvm]

Actually, we can use one mmio_fragment to store a large mmio access then
split it when we pass the mmio-exit-info to userspace. After that, we only
need two entries to store mmio info for the cross-mmio pages access

Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-10-31 20:36:30 -02:00
John W. Linville
0627291148 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless into for-davem 2012-10-31 13:10:01 -04:00
Konrad Rzeszutek Wilk
95a7d76897 xen/mmu: Use Xen specific TLB flush instead of the generic one.
As Mukesh explained it, the MMUEXT_TLB_FLUSH_ALL allows the
hypervisor to do a TLB flush on all active vCPUs. If instead
we were using the generic one (which ends up being xen_flush_tlb)
we end up making the MMUEXT_TLB_FLUSH_LOCAL hypercall. But
before we make that hypercall the kernel will IPI all of the
vCPUs (even those that were asleep from the hypervisor
perspective). The end result is that we needlessly wake them
up and do a TLB flush when we can just let the hypervisor
do it correctly.

This patch gives around 50% speed improvement when migrating
idle guest's from one host to another.

Oracle-bug: 14630170

CC: stable@vger.kernel.org
Tested-by:  Jingjie Jiang <jingjie.jiang@oracle.com>
Suggested-by:  Mukesh Rathor <mukesh.rathor@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2012-10-31 12:38:31 -04:00
Linus Torvalds
2df4f26167 Some fixes for md in 3.7
- one recently introduced crash for dm-raid10 with discard
  - one bug in new functionality that has been around for a few releases.
  - minor bug in md's 'faulty' personality
 
  and UAPI disintegration for md.
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Merge tag 'md-3.7-fixes' of git://neil.brown.name/md

Pull md fixes from NeilBrown:
 "Some fixes for md in 3.7
   - one recently introduced crash for dm-raid10 with discard
   - one bug in new functionality that has been around for a few
     releases.
   - minor bug in md's 'faulty' personality

  and UAPI disintegration for md."

* tag 'md-3.7-fixes' of git://neil.brown.name/md:
  MD RAID10: Fix oops when creating RAID10 arrays via dm-raid.c
  md/raid1: Fix assembling of arrays containing Replacements.
  md faulty: use disk_stack_limits()
  UAPI: (Scripted) Disintegrate include/linux/raid
2012-10-30 19:48:48 -07:00
Takashi Iwai
a0830dbd4e ALSA: Add a reference counter to card instance
For more strict protection for wild disconnections, a refcount is
introduced to the card instance, and let it up/down when an object is
referred via snd_lookup_*() in the open ops.

The free-after-last-close check is also changed to check this refcount
instead of the empty list, too.

Reported-by: Matthieu CASTET <matthieu.castet@parrot.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-10-30 11:07:10 +01:00
John W. Linville
efec22b468 Merge branch 'for-john' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211 2012-10-29 14:14:48 -04:00
Mikulas Patocka
1bf11c5353 percpu-rw-semaphores: use rcu_read_lock_sched
Use rcu_read_lock_sched / rcu_read_unlock_sched / synchronize_sched
instead of rcu_read_lock / rcu_read_unlock / synchronize_rcu.

This is an optimization. The RCU-protected region is very small, so
there will be no latency problems if we disable preempt in this region.

So we use rcu_read_lock_sched / rcu_read_unlock_sched that translates
to preempt_disable / preempt_disable. It is smaller (and supposedly
faster) than preemptible rcu_read_lock / rcu_read_unlock.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-10-28 10:59:36 -07:00
Mikulas Patocka
5c1eabe685 percpu-rw-semaphores: use light/heavy barriers
This patch introduces new barrier pair light_mb() and heavy_mb() for
percpu rw semaphores.

This patch fixes a bug in percpu-rw-semaphores where a barrier was
missing in percpu_up_write.

This patch improves performance on the read path of
percpu-rw-semaphores: on non-x86 cpus, there was a smp_mb() in
percpu_up_read. This patch changes it to a compiler barrier and removes
the "#if defined(X86) ..." condition.

From: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-10-28 10:59:36 -07:00
Linus Torvalds
e657e078d3 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:
 "This is what we usually expect at this stage of the game, lots of
  little things, mostly in drivers.  With the occasional 'oops didn't
  mean to do that' kind of regressions in the core code."

 1) Uninitialized data in __ip_vs_get_timeouts(), from Arnd Bergmann

 2) Reject invalid ACK sequences in Fast Open sockets, from Jerry Chu.

 3) Lost error code on return from _rtl_usb_receive(), from Christian
    Lamparter.

 4) Fix reset resume on USB rt2x00, from Stanislaw Gruszka.

 5) Release resources on error in pch_gbe driver, from Veaceslav Falico.

 6) Default hop limit not set correctly in ip6_template_metrics[], fix
    from Li RongQing.

 7) Gianfar PTP code requests wrong kind of resource during probe, fix
    from Wei Yang.

 8) Fix VHOST net driver on big-endian, from Michael S Tsirkin.

 9) Mallenox driver bug fixes from Jack Morgenstein, Or Gerlitz, Moni
    Shoua, Dotan Barak, and Uri Habusha.

10) usbnet leaks memory on TX path, fix from Hemant Kumar.

11) Use socket state test, rather than presence of FIN bit packet, to
    determine FIONREAD/SIOCINQ value.  Fix from Eric Dumazet.

12) Fix cxgb4 build failure, from Vipul Pandya.

13) Provide a SYN_DATA_ACKED state to complement SYN_FASTOPEN in socket
    info dumps.  From Yuchung Cheng.

14) Fix leak of security path in kfree_skb_partial().  Fix from Eric
    Dumazet.

15) Handle RX FIFO overflows more resiliently in pch_gbe driver, from
    Veaceslav Falico.

16) Fix MAINTAINERS file pattern for networking drivers, from Jean
    Delvare.

17) Add iPhone5 IDs to IPHETH driver, from Jay Purohit.

18) VLAN device type change restriction is too strict, and should not
    trigger for the automatically generated vlan0 device.  Fix from Jiri
    Pirko.

19) Make PMTU/redirect flushing work properly again in ipv4, from
    Steffen Klassert.

20) Fix memory corruptions by using kfree_rcu() in netlink_release().
    From Eric Dumazet.

21) More qmi_wwan device IDs, from Bjørn Mork.

22) Fix unintentional change of SNAT/DNAT hooks in generic NAT
    infrastructure, from Elison Niven.

23) Fix 3.6.x regression in xt_TEE netfilter module, from Eric Dumazet.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (57 commits)
  tilegx: fix some issues in the SW TSO support
  qmi_wwan/cdc_ether: move Novatel 551 and E362 to qmi_wwan
  net: usb: Fix memory leak on Tx data path
  net/mlx4_core: Unmap UAR also in the case of error flow
  net/mlx4_en: Don't use vlan tag value as an indication for vlan presence
  net/mlx4_en: Fix double-release-range in tx-rings
  bas_gigaset: fix pre_reset handling
  vhost: fix mergeable bufs on BE hosts
  gianfar_ptp: use iomem, not ioports resource tree in probe
  ipv6: Set default hoplimit as zero.
  NET_VENDOR_TI: make available for am33xx as well
  pch_gbe: fix error handling in pch_gbe_up()
  b43: Fix oops on unload when firmware not found
  mwifiex: clean up scan state on error
  mwifiex: return -EBUSY if specific scan request cannot be honored
  brcmfmac: fix potential NULL dereference
  Revert "ath9k_hw: Updated AR9003 tx gain table for 5GHz"
  ath9k_htc: Add PID/VID for a Ubiquiti WiFiStation
  rt2x00: usb: fix reset resume
  rtlwifi: pass rx setup error code to caller
  ...
2012-10-26 15:00:48 -07:00
Johannes Berg
9b395bc3be mac80211: verify that skb data is present
A number of places in the mesh code don't check that
the frame data is present and in the skb header when
trying to access. Add those checks and the necessary
pskb_may_pull() calls. This prevents accessing data
that doesn't actually exist.

To do this, export ieee80211_get_mesh_hdrlen() to be
able to use it in mac80211.

Cc: stable@vger.kernel.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-10-26 22:52:42 +02:00
Linus Torvalds
490916d6ba Staging driver fixes for 3.7-rc3
Here are some staging driver fixes for your 3.7-rc tree.
 
 Nothing major here, a number of iio driver fixups that were causing problems,
 some comedi driver bugfixes, and a bunch of tidspbridge warning squashing and
 other regressions fixed from the 3.6 release.
 
 All have been in the linux-next releases for a bit.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-3.7-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging driver fixes from Greg Kroah-Hartman:
 "Here are some staging driver fixes for your 3.7-rc tree.

  Nothing major here, a number of iio driver fixups that were causing
  problems, some comedi driver bugfixes, and a bunch of tidspbridge
  warning squashing and other regressions fixed from the 3.6 release.

  All have been in the linux-next releases for a bit.

  Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"

* tag 'staging-3.7-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (32 commits)
  staging: tidspbridge: delete unused mmu functions
  staging: tidspbridge: ioremap physical address of the stack segment in shm
  staging: tidspbridge: ioremap dsp sync addr
  staging: tidspbridge: change type to __iomem for per and core addresses
  staging: tidspbridge: drop const from custom mmu implementation
  staging: tidspbridge: request the right irq for mmu
  staging: ipack: add missing include (implicit declaration of function 'kfree')
  staging: ramster: depends on NET
  staging: omapdrm: fix allocation size for page addresses array
  staging: zram: Fix handling of incompressible pages
  Staging: android: binder: Allow using highmem for binder buffers
  Staging: android: binder: Fix memory leak on thread/process exit
  staging: comedi: ni_labpc: fix possible NULL deref during detach
  staging: comedi: das08: fix possible NULL deref during detach
  staging: comedi: amplc_pc263: fix possible NULL deref during detach
  staging: comedi: amplc_pc236: fix possible NULL deref during detach
  staging: comedi: amplc_pc236: fix invalid register access during detach
  staging: comedi: amplc_dio200: fix possible NULL deref during detach
  staging: comedi: 8255_pci: fix possible NULL deref during detach
  staging: comedi: ni_daq_700: fix dio subdevice regression
  ...
2012-10-26 10:25:31 -07:00
Linus Torvalds
299650cad6 Driver core fixes for 3.7-rc3
Here are a number of firmware core fixes for 3.7, and some other minor fixes.
 And some documentation updates thrown in for good measure.
 
 All have been in the linux-next tree for a while.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-3.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core fixes from Greg Kroah-Hartman:
 "Here are a number of firmware core fixes for 3.7, and some other minor
  fixes.  And some documentation updates thrown in for good measure.

  All have been in the linux-next tree for a while.

  Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"

* tag 'driver-core-3.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
  Documentation:Chinese translation of Documentation/arm64/memory.txt
  Documentation:Chinese translation of Documentation/arm64/booting.txt
  Documentation:Chinese translation of Documentation/IRQ.txt
  firmware loader: document kernel direct loading
  sysfs: sysfs_pathname/sysfs_add_one: Use strlcat() instead of strcat()
  dynamic_debug: Remove unnecessary __used
  firmware loader: sync firmware cache by async_synchronize_full_domain
  firmware loader: let direct loading back on 'firmware_buf'
  firmware loader: fix one reqeust_firmware race
  firmware loader: cancel uncache work before caching firmware
2012-10-26 10:24:51 -07:00
Linus Torvalds
f76ddd9807 Char/misc driver fixes for 3.7-rc3
Here are some driver fixes for 3.7.  They include extcon driver fixes, a
 hyper-v bugfix, and two other minor driver fixes.
 
 All of these have been in the linux-next releases for a while.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-3.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver fixes from Greg Kroah-Hartman:
 "Here are some driver fixes for 3.7.  They include extcon driver fixes,
  a hyper-v bugfix, and two other minor driver fixes.

  All of these have been in the linux-next releases for a while.

  Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"

* tag 'char-misc-3.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  sonypi: suspend/resume callbacks should be conditionally compiled on CONFIG_PM_SLEEP
  Drivers: hv: Cleanup error handling in vmbus_open()
  extcon : register for cable interest by cable name
  extcon: trivial: kfree missed from remove path
  extcon: driver model release call not needed
  extcon: MAX77693: Add platform data for MUIC device to initialize registers
  extcon: max77693: Use max77693_update_reg for rmw operations
  extcon: Fix kerneldoc for extcon_set_cable_state and extcon_set_cable_state_
  extcon: adc-jack: Add missing MODULE_LICENSE
  extcon: adc-jack: Fix checking return value of request_any_context_irq
  extcon: Fix return value in extcon_register_interest()
  extcon: unregister compat link on cleanup
  extcon: Unregister compat class at module unload to fix oops
  extcon: optimising the check_mutually_exclusive function
  extcon: standard cable names definition and declaration changed
  extcon-max8997: remove usage of ret in max8997_muic_handle_charger_type_detach
  extcon: Remove duplicate inclusion of extcon.h header file
2012-10-26 10:24:19 -07:00
Linus Torvalds
622f202a4c Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
 "This fixes a couple of nasty page table initialization bugs which were
  causing kdump regressions.  A clean rearchitecturing of the code is in
  the works - meanwhile these are reverts that restore the
  best-known-working state of the kernel.

  There's also EFI fixes and other small fixes."

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86, mm: Undo incorrect revert in arch/x86/mm/init.c
  x86: efi: Turn off efi_enabled after setup on mixed fw/kernel
  x86, mm: Find_early_table_space based on ranges that are actually being mapped
  x86, mm: Use memblock memory loop instead of e820_RAM
  x86, mm: Trim memory in memblock to be page aligned
  x86/irq/ioapic: Check for valid irq_cfg pointer in smp_irq_move_cleanup_interrupt
  x86/efi: Fix oops caused by incorrect set_memory_uc() usage
  x86-64: Fix page table accounting
  Revert "x86/mm: Fix the size calculation of mapping tables"
  MAINTAINERS: Add EFI git repository location
2012-10-26 09:35:46 -07:00
Linus Torvalds
6a2e52f844 Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
 "Most of the kernel diffstat relates to a group of Intel P6 and KNC
  (Xeon-Phi Knights Corner) PMU driver fixes, neither of which is in
  heavy use, so we took the fixes.

  The rest is diverse smallish fixes to the tooling and kernel side."

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86: Remove unused variable in nhmex_rbox_alter_er()
  perf/x86: Enable overflow on Intel KNC with a custom knc_pmu_handle_irq()
  perf/x86: Remove cpuc->enable check on Intl KNC event enable/disable
  perf/x86: Make Intel KNC use full 40-bit width of counters
  perf/x86/uncore: Handle pci_read_config_dword() errors
  perf/x86: Remove P6 cpuc->enabled check
  perf/x86: Update/fix generic events on P6 PMU
  perf/x86: Fix P6 FP_ASSIST event constraint
  perf, cpu hotplug: Use cached value of smp_processor_id()
  perf, cpu hotplug: Run CPU_STARTING notifiers with irqs disabled
  x86/perf: Fix virtualization sanity check
  perf test: Fix exclude_guest parse events tests
  perf tools: do not flush maps on COMM for perf report
  perf help: Fix --help for builtins
  perf trace: Check if sample raw_data field is set
  perf trace: Validate syscall id before growing syscall table
2012-10-26 09:35:00 -07:00
Linus Torvalds
b394209ce5 Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Pull drm radeon fixes from Dave Airlie:
 "Just radeon fixes in this one:
   - some new PCI IDs
   - ATPX regression fix
   - async VM regression fixes
   - some module options fixes"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/radeon: fix ATPX regression in acpi rework
  drm/radeon: fix ATPX function documentation
  drm/radeon: move the retry to gem_object_create
  drm/radeon: move size limits to gem_object_create.
  drm/radeon: use vzalloc for gart pages
  drm/radeon: fix and simplify pot argument checks v3
  drm/radeon: fix header size estimation in VM code
  drm/radeon: remove set_page check from VM code
  drm/radeon: fix si_set_page v2
  drm/radeon: fix cayman_vm_set_page v2
  drm/radeon: fix PFP sync in vm_flush
  drm/radeon: add error output if VM CS fails on cayman
  drm/radeon: give each backlight a unique id
  drm/radeon: fix sparse warning
  drm/radeon: add some new SI PCI ids
2012-10-25 19:26:54 -07:00
Will Deacon
29fc7c5a4f rbtree: include linux/compiler.h for definition of __always_inline
rb_erase_augmented() is a static function annotated with
__always_inline.  This causes a compile failure when attempting to use
the rbtree implementation as a library (e.g.  kvm tool):

  rbtree_augmented.h:125:24: error: expected `=', `,', `;', `asm' or `__attribute__' before `void'

Include linux/compiler.h in rbtree_augmented.h so that the __always_inline
macro is resolved correctly.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Cc: Pekka Enberg <penberg@kernel.org>
Reviewed-by: Michel Lespinasse <walken@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-10-25 14:37:52 -07:00
Linus Torvalds
4864ccbb5a spi: Fixes for v3.7
A bunch of fixes here, mostly minor except for the pl022 which has just
 been a bit of a shambles all round, the recent runtime PM changes have
 as far as I can tell never worked so they're just getting thrown out.
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Merge tag 'spi-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc

Pull spi fixes from Mark Brown:
 "A bunch of fixes here, mostly minor except for the pl022 which has
  just been a bit of a shambles all round, the recent runtime PM changes
  have as far as I can tell never worked so they're just getting thrown
  out."

* tag 'spi-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc:
  spi/pl022: Revert recent runtime PM changes
  spi: tsc2005: delete soon-obsolete e-mail address
  spi: spi-rspi: fix build error for the latest shdma driver
2012-10-24 18:00:17 -07:00
Joe Perches
c0d2af6378 dynamic_debug: Remove unnecessary __used
The __used attribute prevents gcc from eliminating
unnecessary, otherwise optimized away, metadata for
debugging logging messages.

Remove the __used attribute.

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Jason Baron <jbaron@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-10-24 15:57:14 -07:00
Yinghai Lu
6ede1fd3cb x86, mm: Trim memory in memblock to be page aligned
We will not map partial pages, so need to make sure memblock
allocation will not allocate those bytes out.

Also we will use for_each_mem_pfn_range() to loop to map memory
range to keep them consistent.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/CAE9FiQVZirvaBMFYRfXMmWEcHbKSicQEHz4VAwUv0xFCk51ZNw@mail.gmail.com
Acked-by: Jacob Shin <jacob.shin@amd.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: <stable@vger.kernel.org>
2012-10-24 11:52:21 -07:00
Srivatsa S. Bhat
c13d38e4a1 perf, cpu hotplug: Use cached value of smp_processor_id()
The perf_cpu_notifier() macro invokes smp_processor_id()
multiple times. Optimize it by using a local variable.

Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: peterz@infradead.org
Cc: acme@ghostprotocols.net
Link: http://lkml.kernel.org/r/20121016075817.3572.76733.stgit@srivatsabhat.in.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2012-10-24 10:01:59 +02:00
Srivatsa S. Bhat
6760bca9fd perf, cpu hotplug: Run CPU_STARTING notifiers with irqs disabled
The CPU_STARTING notifiers are supposed to be run with irqs
disabled. But the perf_cpu_notifier() macro invokes them without
doing that. Fix it.

Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: peterz@infradead.org
Cc: acme@ghostprotocols.net
Link: http://lkml.kernel.org/r/20121016075809.3572.47848.stgit@srivatsabhat.in.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2012-10-24 10:01:58 +02:00