12 years agoV4L/DVB (5747): Tea5761: remove duplicated "#include <media/tuner.h>"
Michael Krufky [Wed, 6 Jun 2007 18:28:10 +0000]
V4L/DVB (5747): Tea5761: remove duplicated "#include <media/tuner.h>"

The line, "#include <media/tuner.h>" appears twice.
This patch removes the second occurance.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5745): Dvb: use '+=' instead of '=' for EXTRA_CFLAGS
Trent Piepho [Mon, 4 Jun 2007 23:18:51 +0000]
V4L/DVB (5745): Dvb: use '+=' instead of '=' for EXTRA_CFLAGS

The Makefiles in the dvb directory tree used '=' when defining EXTRA_CFLAGS
rather than '+=', which is far more common in the rest of the kernel source.
  =  14 times (9 of which this patch removes)
 :=  25 times
 += 123 times
This change also has certain advantages for the out of kernel v4l-dvb build
system.

Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5743): Tuner: clean up kfree() after release
Michael Krufky [Mon, 4 Jun 2007 19:00:45 +0000]
V4L/DVB (5743): Tuner: clean up kfree() after release

Although it is safe to kfree(NULL), We only need to kfree(priv)
if the release callback is undefined.  As it stands now, there
is some redundancy in the operation of releasing the priv data
structures. This patch will call kfree(priv) and set priv to NULL,
if the release callback isnt defined.  Otherwise, let the release
callback handle this itself.
Thanks to Mauro Carvalho Chehab for suggesting this.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5742): Tuner: define release callback for mt20xx, tda9887 and tda8290
Michael Krufky [Mon, 4 Jun 2007 18:20:11 +0000]
V4L/DVB (5742): Tuner: define release callback for mt20xx, tda9887 and tda8290

Define tuner release callbacks for mt20xx, tda9887 and tda8290, so that
these drivers can release their own private structures themselves.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5741): Tuner: add release callback
Michael Krufky [Mon, 4 Jun 2007 17:40:27 +0000]
V4L/DVB (5741): Tuner: add release callback

Individual tuner drivers are now allocating memory themselves for
their own private data structures.  This changeset adds a release
callback to the tuner operations, so that newer drivers that may
require more complex data structures may release this private data
themselves.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5740): Git-dvb: fix the tea5761 tuner support
Adrian Bunk [Tue, 5 Jun 2007 08:22:00 +0000]
V4L/DVB (5740): Git-dvb: fix the tea5761 tuner support

Due to a typo the tea5761 tuner support was dead code.
This patch also fixes a bug in the no longer dead code:
A void function can't return anything.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5739): Replace C code with calls to ARRAY_SIZE macro.
Robert P. J. Day [Tue, 5 Jun 2007 08:20:56 +0000]
V4L/DVB (5739): Replace C code with calls to ARRAY_SIZE macro.

Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5734): Cx88: kill dev->fw_size
Michael Krufky [Wed, 30 May 2007 16:29:32 +0000]
V4L/DVB (5734): Cx88: kill dev->fw_size

Now that cx88-blackbird is only accepting the official firmware image,
we no longer have any need to store the size of the firmware inside the
cx88 data structure.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5733): Blackbird should accept only new cx2341x encoding firmwares
Hans Verkuil [Wed, 30 May 2007 12:39:46 +0000]
V4L/DVB (5733): Blackbird should accept only new cx2341x encoding firmwares

Remove temporary support for older 256 kB firmwares.
ivtv, pvrusb2 and blackbird can now all handle the newer larger firmwares,
so support for the older (buggier) firmware can be removed.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5729): Remove support for 256 Kb firmware files.
Hans Verkuil [Tue, 29 May 2007 10:18:55 +0000]
V4L/DVB (5729): Remove support for 256 Kb firmware files.

For backwards compatibility firmware files of 256 Kb were allowed: all
drivers have now been updated to support the newer larger firmwares so
remove this compatibility code and only support the newer firmware.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5727): Remove VIVI_SCATTER
Mauro Carvalho Chehab [Tue, 29 May 2007 10:14:59 +0000]
V4L/DVB (5727): Remove VIVI_SCATTER

vivi scatter method were used as a proof of concept. It can be
safelly removed from mainstream, since the current method is
faster and better than the previous solution.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5724): Saa7134-tvaudio: kthread conversion
Christoph Hellwig [Fri, 1 Jun 2007 23:15:26 +0000]
V4L/DVB (5724): Saa7134-tvaudio: kthread conversion

Acked-by: Hermann Pitton <hermann-pitton@arcor.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5719): Tuner: Move device-specific private data out of tuner struct
Michael Krufky [Wed, 30 May 2007 01:54:06 +0000]
V4L/DVB (5719): Tuner: Move device-specific private data out of tuner struct

Create private data struct for device specific private data.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5718): Mt20xx: whitespace cleanup
Michael Krufky [Tue, 29 May 2007 18:36:37 +0000]
V4L/DVB (5718): Mt20xx: whitespace cleanup

replace leading spaces with tabs

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5705): Removed unnecessary .hardware from video_device struct.
Douglas Schilling Landgraf [Sun, 27 May 2007 17:05:01 +0000]
V4L/DVB (5705): Removed unnecessary .hardware from video_device struct.

From: Douglas Schilling Landgraf <dougsland@gmail.com>

Signed-off-by: Douglas Schilling Landgraf <dougsland@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5704): Remove worthless references to obsolete MODULE_PARM macro.
Robert P. J. Day [Mon, 28 May 2007 19:21:40 +0000]
V4L/DVB (5704): Remove worthless references to obsolete MODULE_PARM macro.

Remove the long-dead references to the obsolete MODULE_PARM macro.
Given that the first one of those is actually misspelled as
"MODULE_PARAM", it's clear that they can't have been doing any good.
Acked-by: Thierry Merle <thierry.merle@free.fr>

Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5698): Input: drivers/media - switch to using input_dev->dev.parent
Dmitry Torokhov [Mon, 16 Jul 2007 12:28:15 +0000]
V4L/DVB (5698): Input: drivers/media - switch to using input_dev->dev.parent

In preparation for struct class_device -> struct device input
core conversion switch to using input_dev->dev.parent when
specifying device position in sysfs tree.

Signed-off-by: Dmitry Torokhov <dtor at mail.ru>
Acked-by: Thierry Merle <thierry.merle@free.fr>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5701): Documentation/dvb/bt8xx.txt update
Uwe Bugla [Sat, 26 May 2007 10:56:29 +0000]
V4L/DVB (5701): Documentation/dvb/bt8xx.txt update

This patch synchronizes the Documentation for bt8xx-based cards to the
actual state of kernel 2.6.22-rc1.

Signed-off-by: Uwe Bugla <uwe.bugla@gmx.de>
Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5696): M920x: add missing error handling to prevent syslog spamming
Aapo Tahkola [Tue, 8 May 2007 21:33:52 +0000]
V4L/DVB (5696): M920x: add missing error handling to prevent syslog spamming

Signed-off-by: Aapo Tahkola <aet@rasterburn.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5695): M920x: enable second adapter on LifeView TV Walker Twin
Aapo Tahkola [Tue, 8 May 2007 21:23:38 +0000]
V4L/DVB (5695): M920x: enable second adapter on LifeView TV Walker Twin

Enable second adapter on LifeView TV Walker Twin DVB-T USB2.0

Signed-off-by: Aapo Tahkola <aet@rasterburn.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5694): M920x: fix for Dposh devices
Aapo Tahkola [Tue, 8 May 2007 21:21:47 +0000]
V4L/DVB (5694): M920x: fix for Dposh devices

Make sure devices manufactured by Dposh are not affected by previous hw
pid filtering changes

Doing so might crash it.

Signed-off-by: Aapo Tahkola <aet@rasterburn.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5693): M920x: second endpoint also needs to be changed to alt setting
Aapo Tahkola [Tue, 8 May 2007 15:56:54 +0000]
V4L/DVB (5693): M920x: second endpoint also needs to be changed to alt setting

Spotted by Jeremy Nysen.

Signed-off-by: Aapo Tahkola <aet@rasterburn.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5692): M920x: attempt to fix hw pid filters on second endpoint
Aapo Tahkola [Tue, 8 May 2007 15:03:55 +0000]
V4L/DVB (5692): M920x: attempt to fix hw pid filters on second endpoint

Signed-off-by: Aapo Tahkola <aet@rasterburn.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoMerge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6
Linus Torvalds [Wed, 18 Jul 2007 17:23:37 +0000]
Merge branch 'master' of /linux/kernel/git/davem/sparc-2.6

* 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6:
  [SPARC64]: Set vio->desc_buf to NULL after freeing.
  [SPARC]: Mark sparc and sparc64 as not having virt_to_bus
  [SPARC64]: Fix reset handling in VNET driver.
  [SPARC64]: Handle reset events in vio_link_state_change().
  [SPARC64]: Handle LDC resets properly in domain-services driver.
  [SPARC64]: Massively simplify VIO device layer and support hot add/remove.
  [SPARC64]: Simplify VNET probing.
  [SPARC64]: Simplify VDC device probing.
  [SPARC64]: Add basic infrastructure for MD add/remove notification.

12 years agoV4L/DVB (5685): Cx88: add support for ADS Tech Instant Video PCI
Daniel Gimpelevich [Thu, 17 May 2007 21:10:17 +0000]
V4L/DVB (5685): Cx88: add support for ADS Tech Instant Video PCI

Signed-off-by: Daniel Gimpelevich <daniel@gimpelevich.san-francisco.ca.us>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5684): V4L: ir-kbd-i2c - switch to using msecs_to_jiffies()
Dmitry Torokhov [Mon, 21 May 2007 14:51:11 +0000]
V4L/DVB (5684): V4L: ir-kbd-i2c - switch to using msecs_to_jiffies()

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5683): V4L: cx88 - switch to using msecs_to_jiffies()
Dmitry Torokhov [Mon, 21 May 2007 14:48:11 +0000]
V4L/DVB (5683): V4L: cx88 - switch to using msecs_to_jiffies()

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5682): SAA7134 - switch to use msecs_to_jiffies()
Dmitry Torokhov [Mon, 21 May 2007 14:41:02 +0000]
V4L/DVB (5682): SAA7134 - switch to use msecs_to_jiffies()

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5681): Correct aliases for STD/L and STD/Lc
Mauro Carvalho Chehab [Mon, 21 May 2007 14:39:21 +0000]
V4L/DVB (5681): Correct aliases for STD/L and STD/Lc

Some macros were using very weird names, like PAL/L (this std doesn't
exist). Fixing it.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5678): Zr364xx: fix return values
Akinobu Mita [Sun, 20 May 2007 12:12:10 +0000]
V4L/DVB (5678): Zr364xx: fix return values

This patch fixes several return value related problems in zr364xx.

- return -ENOMEM instead of -ENODEV on out of memory

- zr364xx checks video_register_device() error only when
  its return value is -1. But video_register_device() doesn't
  always return -1 on error.

- If usb_register() returns error, module_init() wrongly returns 1:
retval = usb_register(&zr364xx_driver) < 0;
...
return retval;

  And it allows the module to be loaded. Because sys_init_module() doesn't
  see positive return value as error.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Antoine Jacquet <royale@zerezo.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5674): Models 30012-30039 are for a low profile PVR250, not PVR150.
Hans Verkuil [Fri, 18 May 2007 19:18:17 +0000]
V4L/DVB (5674): Models 30012-30039 are for a low profile PVR250, not PVR150.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5671): Autodetect new PVR150 low profile cards.
Hans Verkuil [Thu, 17 May 2007 09:52:32 +0000]
V4L/DVB (5671): Autodetect new PVR150 low profile cards.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5669): Budget-av: Add support for EasyWatch DVB-S (0x1894:0x001b)
Oliver Endriss [Mon, 14 May 2007 02:25:57 +0000]
V4L/DVB (5669): Budget-av: Add support for EasyWatch DVB-S (0x1894:0x001b)

Add support for Satelco EasyWatch PCI DVB-S card (subsystem 0x1894:0x001b).

Signed-off-by: Oliver Endriss <o.endriss@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5637): Cx88: kill core->pll_desc and core->pll_addr
Michael Krufky [Tue, 8 May 2007 21:23:40 +0000]
V4L/DVB (5637): Cx88: kill core->pll_desc and core->pll_addr

Now that dvb-pll is being used properly in all cx88-dvb instances,
the cx88 driver no longer needs to store pll_desc nor pll_addr.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5636): Integrate all users of the fmd1216 tuner with dvb-pll
Trent Piepho [Tue, 8 May 2007 21:05:16 +0000]
V4L/DVB (5636): Integrate all users of the fmd1216 tuner with dvb-pll

Enhance the dvb-pll definition of the fmd1216 tuner by adding an init sequence
and a sleep sequence.

The init sequence sets the AGC control register to 0xa0, selecting the fast
time constant and 112 dBuV take-over point.  This the recommended value for
DVB-T operation.

The sleep sequence sets bit P4 (which is believed to turn the analog
demodulator on), turns off the tuning voltage, and sets the AGC control
register to 0x60 (external AGC voltage, the recommended value for analog
operation).

The existing dvb-pll users in the cx88 driver, listed below, will gain these
init and sleep sequences.

CX88_BOARD_HAUPPAUGE_HVR1100    Hauppauge WinTV-HVR1100 DVB-T/Hybrid
CX88_BOARD_HAUPPAUGE_HVR1100LP  Hauppauge WinTV-HVR1100 DVB-T/Hybrid (Low Profi
CX88_BOARD_WINFAST_DTV2000H     WinFast DTV2000 H
CX88_BOARD_HAUPPAUGE_HVR3000    Hauppauge WinTV-HVR3000 TriMode Analog/DVB-S/DV
CX88_BOARD_HAUPPAUGE_HVR1300    Hauppauge WinTV-HVR1300 DVB-T/Hybrid MPEG Encod

This non-dvb-pll user in the cx88 driver should only gain the sleep sequence,
as it already had an equivalent init sequence.  The non-dvb-pll code for this
user is removed.

X88_BOARD_DNTV_LIVE_DVB_T_PRO   digitalnow DNTV Live! DVB-T Pro

In these saa7134 driver, these non-dvb-pll users are converted to use dvb-pll:

SAA7134_BOARD_MD7134                    Medion 7134
SAA7134_BOARD_ASUS_EUROPA2_HYBRID       Asus Europa2 OEM

The saa7134 functions philips_fmd1216_tuner_init(),
philips_fmd1216_tuner_sleep(), and philips_fmd1216_tuner_set_params() are
deleted and the dvb-pll versions are used.

This should result in equivalent sleep, init, and tuning sequences being sent
to the tuner.

For the cxusb driver, only one board is effected:

USB_PID_MEDION_MD95700           Medion MD95700

This board used dvb_usb_tuner_init_i2c() and dvb_usb_tuner_set_params_i2c()
for init and tuning, respectively.  These functions are effectively the same
as the dvb-pll versions.  They call a tuner pass control function defined at
the dvb-usb level, but this does not matter, as this card does not have a
tuner pass control function (only the dib3000mb does).  This board will gain
the sleep sequence, while init and tuning should be unchanged.

Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5628): Add support for A-LINK DTU dvb-t adapter
Aapo Tahkola [Tue, 8 May 2007 20:36:40 +0000]
V4L/DVB (5628): Add support for A-LINK DTU dvb-t adapter

Support for A-LINK DTU(m) is not included in this patch.

Signed-off-by: Aapo Tahkola <aet@rasterburn.org>
Acked-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5626): Marked af9005 driver as experimental and fix dependencies
Luca Olivetti [Mon, 7 May 2007 19:57:57 +0000]
V4L/DVB (5626): Marked af9005 driver as experimental and fix dependencies

Marked af9005 driver as experimental and add dependency for qt1010;
Added a dependency on qt1010 in Kconfig;
Corrected the experimental gain  reduction of the mt2060 in case of
strong signal (though it is code included in #ifdef 0).

Signed-off-by: Luca Olivetti <luca@ventoso.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5625): Add support for the AF9005 demodulator from Afatech
Luca Olivetti [Mon, 7 May 2007 18:19:32 +0000]
V4L/DVB (5625): Add support for the AF9005 demodulator from Afatech

Signed-off-by: Luca Olivetti <luca@ventoso.org>
Signed-off-by: Manu Abraham <abraham.manu@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5652): Dibusb-mb: use dvb_attach for dib3000mb_attach
Michael Krufky [Wed, 9 May 2007 17:52:52 +0000]
V4L/DVB (5652): Dibusb-mb: use dvb_attach for dib3000mb_attach

convert calls to dib3000mb_attach to use dvb_attach

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5651): Dibusb-mb: convert pll handling to properly use dvb-pll
Michael Krufky [Wed, 9 May 2007 18:58:17 +0000]
V4L/DVB (5651): Dibusb-mb: convert pll handling to properly use dvb-pll

moved tda665x pll_init into dvb_pll_desc dvb_pll_tda665x.initdata
convert handling of tda665x and tua6010xs to properly use dvb-pll

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5650): Umt-010: trivial whitespace cleanup
Michael Krufky [Wed, 9 May 2007 16:34:54 +0000]
V4L/DVB (5650): Umt-010: trivial whitespace cleanup

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5649): Umt-010: convert tua6034 handling to properly use dvb-pll
Michael Krufky [Wed, 9 May 2007 16:33:21 +0000]
V4L/DVB (5649): Umt-010: convert tua6034 handling to properly use dvb-pll

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5648): Dvb/frontends: remove unnecessary #include's of "dvb-pll.h"
Michael Krufky [Wed, 9 May 2007 14:49:24 +0000]
V4L/DVB (5648): Dvb/frontends: remove unnecessary #include's of "dvb-pll.h"

These sources do not need to #include "dvb-pll.h"

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5647): Saa7134: enable ir-remote for 10moons TM300
Tony Wan [Fri, 11 May 2007 14:33:50 +0000]
V4L/DVB (5647): Saa7134: enable ir-remote for 10moons TM300

Using Encore's key codes, we needn't add any additional key table.

Signed-off-by: Tony Wan <wankai@sjtu.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5646): V4l: saa7134: add support for 10moons TM300 card
Tony Wan [Thu, 10 May 2007 15:16:47 +0000]
V4L/DVB (5646): V4l: saa7134: add support for 10moons TM300 card

Support the 10moons TM300 TV card (so called TV Master 3), which is a
10moons saa7130 based board.  Here not include features for the
IR-remote.
It has been tested using TVTIME.  The card was auto-detected and all the
input sources worked correct with sound.

Signed-off-by: Tony Wan <wankai@sjtu.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5644): Usbvision: video_ioctl2 conversion
Thierry MERLE [Tue, 8 May 2007 20:22:29 +0000]
V4L/DVB (5644): Usbvision: video_ioctl2 conversion

The ioctl entry point, a big switch/case, is splitted in little
functions.

These functions are set as callbacks for the video_ioctl2 video4linux
facility.

This improves the driver memory consumption and enables the v4l1
compatibility as a side effect.

Signed-off-by: Thierry MERLE <thierry.merle@free.fr>
Acked-by: Dwaine P. Garden <dwainegarden@rogers.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5643): Usbvision: make common video and radio ioctls
Thierry MERLE [Wed, 2 May 2007 21:43:55 +0000]
V4L/DVB (5643): Usbvision: make common video and radio ioctls

Radio and video ioctls are the same,
delete the usbvision_do_radio_ioctl function
add the special cases for radio in usbvision_v4l2_do_ioctl

Signed-off-by: Thierry MERLE <thierry.merle@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5642): add comment that VO_MODE is also being set.
David Warman [Mon, 30 Apr 2007 17:17:04 +0000]
V4L/DVB (5642): add comment that VO_MODE is also being set.

usbvision_set_video_format: add comment that VO_MODE is also being set.

Signed-off-by: David Warman <dwarman@davidwarman.net>
Signed-off-by: Thierry MERLE <thierry.merle@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5641): change VideoNorm to NTSC for Belkin USB Videobus II
David Warman [Mon, 30 Apr 2007 17:12:19 +0000]
V4L/DVB (5641): change VideoNorm to NTSC for Belkin USB Videobus II

Signed-off-by: David Warman <dwarman@davidwarman.net>
Signed-off-by: Thierry MERLE <thierry.merle@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5635): Budget-av: convert philips sd1878 / tda8261 to use dvb-pll
Michael Krufky [Mon, 7 May 2007 04:48:56 +0000]
V4L/DVB (5635): Budget-av: convert philips sd1878 / tda8261 to use dvb-pll

removed philips_sd1878_tda8261_tuner_set_params, using dvb_pll_attach, instead.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5634): Saa7134-dvb: convert philips td1316 handling to use dvb-pll
Michael Krufky [Mon, 7 May 2007 04:34:36 +0000]
V4L/DVB (5634): Saa7134-dvb: convert philips td1316 handling to use dvb-pll

removed mt352_aver777_tuner_calc_regs, using dvb_pll_attach, instead.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5633): Tuv1236d: move rf input switching code into dvb-pll
Michael Krufky [Sat, 5 May 2007 15:15:57 +0000]
V4L/DVB (5633): Tuv1236d: move rf input switching code into dvb-pll

This patch removes duplicate code from cx88-dvb and saa7134-dvb that handles
rf input switching for the TUV1236d tuner.

The functionality is added to dvb-pll, where all the other code that
handles the TUV1236d is kept.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5632): Dvb-pll: pass dvb_frontend_parameters to generic set() function
Michael Krufky [Sat, 5 May 2007 15:05:39 +0000]
V4L/DVB (5632): Dvb-pll: pass dvb_frontend_parameters to generic set() function

Rename dvb_pll_desc.setbw() to set(), and accept struct dvb_frontend_parameters
instead of passing both freq and bandwidth, so that this may be used as a
generic function.

In order to do this, dvb_pll_configure must also be altered in the same manner,
to take struct dvb_frontend_parameters instead of freq and bandwidth.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5631): Dvb-core: Add level fixes to printk()s, plus spelling/grammer
Simon Arlott [Mon, 7 May 2007 00:06:32 +0000]
V4L/DVB (5631): Dvb-core: Add level fixes to printk()s, plus spelling/grammer

All the printks had missing level prefixes so I've fixed these too.
Also fixed some grammer errors.

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5629): Cx88: VP3054 support can't be a module when cx88 is compiled in
Trent Piepho [Sat, 5 May 2007 23:11:32 +0000]
V4L/DVB (5629): Cx88: VP3054 support can't be a module when cx88 is compiled in

If cx88 support is compiled into the kernel while vp3054 is left as a module,
the kernel will fail to link.  Adjust the existing "#if" code in cx88 so
that it won't consider vp3054 to be supported in this case.

It might make sense to move vp3054 selection into the "customisation" menu
instead of a cx88 sub-option (though this is a cx88 feature, there is no extra
chip involved).

It might also make sense to use dvb_attach() to load vp3054 support.

Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoV4L/DVB (5563a): Add experimental support for tea5761 tuner
Mauro Carvalho Chehab [Sun, 8 Apr 2007 04:09:11 +0000]
V4L/DVB (5563a): Add experimental support for tea5761 tuner

This driver were made based on tea5761 specs.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

12 years agoMerge branch 'xen-upstream' of ssh://master.kernel.org/pub/scm/linux/kernel/git/jerem...
Linus Torvalds [Wed, 18 Jul 2007 17:18:39 +0000]
Merge branch 'xen-upstream' of ssh:///linux/kernel/git/jeremy/xen

* 'xen-upstream' of ssh://master.kernel.org/pub/scm/linux/kernel/git/jeremy/xen: (44 commits)
  xen: disable all non-virtual drivers
  xen: use iret directly when possible
  xen: suppress abs symbol warnings for unused reloc pointers
  xen: Attempt to patch inline versions of common operations
  xen: Place vcpu_info structure into per-cpu memory
  xen: handle external requests for shutdown, reboot and sysrq
  xen: machine operations
  xen: add virtual network device driver
  xen: add virtual block device driver.
  xen: add the Xenbus sysfs and virtual device hotplug driver
  xen: Add grant table support
  xen: use the hvc console infrastructure for Xen console
  xen: hack to prevent bad segment register reload
  xen: lazy-mmu operations
  xen: Add support for preemption
  xen: SMP guest support
  xen: Implement sched_clock
  xen: Account for stolen time
  xen: ignore RW mapping of RO pages in pagetable_init
  xen: Complete pagetable pinning
  ...

12 years agoRevert "[POWERPC] Do firmware feature fixups after features are initialised"
Tony Breeds [Wed, 18 Jul 2007 06:17:48 +0000]
Revert "[POWERPC] Do firmware feature fixups after features are initialised"

This reverts commit 5a26f6bbb767d7ad23311a1e81cfdd2bebefb855.

The original patch causes boot failures when built with ppc64_defconfig.  The
quickest fix is to revert it while alterates are investigated.

Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoFix compile failure in arch/powerpc/kernel/pci-common.c
Tony Breeds [Wed, 18 Jul 2007 01:03:55 +0000]
Fix compile failure in arch/powerpc/kernel/pci-common.c

This fixes the fallout from the recent powerpc merge (commit
489de30259e667d7bc47da9da44a0270b050cd97):

CC arch/powerpc/kernel/pci-common.o
  arch/powerpc/kernel/pci-common.c:160: error: conflicting types for 'pcibios_add_platform_entries'
  include/linux/pci.h:889: error: previous declaration of 'pcibios_add_platform_entries' was here

Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
Tested-by: Bret Towe <magnade@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 years agoxen: disable all non-virtual drivers
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:07 +0000]
xen: disable all non-virtual drivers

A domU Xen environment has no non-virtual drivers, so make sure
they're all disabled at once.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>

12 years agoxen: use iret directly when possible
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:07 +0000]
xen: use iret directly when possible

Most of the time we can simply use the iret instruction to exit the
kernel, rather than having to use the iret hypercall - the only
exception is if we're returning into vm86 mode, or from delivering an
NMI (which we don't support yet).

When running native, iret has the behaviour of testing for a pending
interrupt atomically with re-enabling interrupts.  Unfortunately
there's no way to do this with Xen, so there's a window in which we
could get a recursive exception after enabling events but before
actually returning to userspace.

This causes a problem: if the nested interrupt causes one of the
task's TIF_WORK_MASK flags to be set, they will not be checked again
before returning to userspace.  This means that pending work may be
left pending indefinitely, until the process enters and leaves the
kernel again.  The net effect is that a pending signal or reschedule
event could be delayed for an unbounded amount of time.

To deal with this, the xen event upcall handler checks to see if the
EIP is within the critical section of the iret code, after events
are (potentially) enabled up to the iret itself.  If its within this
range, it calls the iret critical section fixup, which adjusts the
stack to deal with any unrestored registers, and then shifts the
stack frame up to replace the previous invocation.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>

12 years agoxen: suppress abs symbol warnings for unused reloc pointers
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:07 +0000]
xen: suppress abs symbol warnings for unused reloc pointers

arch/i386/xen/xen-asm.S defines some small pieces of code which are
used to implement a few paravirt_ops.  They're designed so they can be
used either in-place, or be inline patched into their callsites if
there's enough space.

Some of those operations need to make calls out (specifically, if you
re-enable events [interrupts], and there's a pending event at that
time).  These calls need the call instruction to be relocated if the
code is patched inline.  In this case xen_foo_reloc is a
section-relative symbol which points to xen_foo's required relocation.

Other operations have no need of a relocation, and so their
corresponding xen_bar_reloc is absolute 0.  These are the cases which
are triggering the warning.

This patch adds those symbols to the list of safe abs symbols.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Adrian Bunk <bunk@stusta.de>

12 years agoxen: Attempt to patch inline versions of common operations
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:07 +0000]
xen: Attempt to patch inline versions of common operations

This patchs adds the mechanism to allow us to patch inline versions of
common operations.

The implementations of the direct-access versions save_fl, restore_fl,
irq_enable and irq_disable are now in assembler, and the same code is
used for both out of line and inline uses.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Chris Wright <chrisw@sous-sol.org>
Cc: Keir Fraser <keir@xensource.com>

12 years agoxen: Place vcpu_info structure into per-cpu memory
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:07 +0000]
xen: Place vcpu_info structure into per-cpu memory

An experimental patch for Xen allows guests to place their vcpu_info
structs anywhere.  We try to use this to place the vcpu_info into the
PDA, which allows direct access.

If this works, then switch to using direct access operations for
irq_enable, disable, save_fl and restore_fl.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Chris Wright <chrisw@sous-sol.org>
Cc: Keir Fraser <keir@xensource.com>

12 years agoxen: handle external requests for shutdown, reboot and sysrq
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:07 +0000]
xen: handle external requests for shutdown, reboot and sysrq

The guest domain can be asked to shutdown or reboot itself, or have a
sysrq key injected, via xenbus.  This patch adds a watcher for those
events, and does the appropriate action.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Chris Wright <chrisw@sous-sol.org>

12 years agoxen: machine operations
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:07 +0000]
xen: machine operations

Make the appropriate hypercalls to halt and reboot the virtual machine.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Acked-by: Chris Wright <chrisw@sous-sol.org>

12 years agoxen: add virtual network device driver
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:06 +0000]
xen: add virtual network device driver

The network device frontend driver allows the kernel to access network
devices exported exported by a virtual machine containing a physical
network device driver.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Acked-by: Jeff Garzik <jeff@garzik.org>
Cc: Ian Pratt <ian.pratt@xensource.com>
Cc: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
Cc: Stephen Hemminger <shemminger@linux-foundation.org>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Keir Fraser <Keir.Fraser@cl.cam.ac.uk>
Cc: netdev@vger.kernel.org

12 years agoxen: add virtual block device driver.
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:06 +0000]
xen: add virtual block device driver.

The block device frontend driver allows the kernel to access block
devices exported exported by a virtual machine containing a physical
block device driver.

Signed-off-by: Ian Pratt <ian.pratt@xensource.com>
Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: Greg KH <greg@kroah.com>
Cc: Jens Axboe <axboe@kernel.dk>

12 years agoxen: add the Xenbus sysfs and virtual device hotplug driver
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:06 +0000]
xen: add the Xenbus sysfs and virtual device hotplug driver

This communicates with the machine control software via a registry
residing in a controlling virtual machine. This allows dynamic
creation, destruction and modification of virtual device
configurations (network devices, block devices and CPUS, to name some
examples).

[ Greg, would you mind giving this a review?  Thanks -J ]

Signed-off-by: Ian Pratt <ian.pratt@xensource.com>
Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Cc: Greg KH <greg@kroah.com>

12 years agoxen: Add grant table support
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:06 +0000]
xen: Add grant table support

Add Xen 'grant table' driver which allows granting of access to
selected local memory pages by other virtual machines and,
symmetrically, the mapping of remote memory pages which other virtual
machines have granted access to.

This driver is a prerequisite for many of the Xen virtual device
drivers, which grant the 'device driver domain' restricted and
temporary access to only those memory pages that are currently
involved in I/O operations.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Ian Pratt <ian.pratt@xensource.com>
Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>

12 years agoxen: use the hvc console infrastructure for Xen console
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:06 +0000]
xen: use the hvc console infrastructure for Xen console

Implement a Xen back-end for hvc console.

* * *
Add early printk support via hvc console, enable using
"earlyprintk=xen" on the kernel command line.

From: Gerd Hoffmann <kraxel@suse.de>
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Olof Johansson <olof@lixom.net>

12 years agoxen: hack to prevent bad segment register reload
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:06 +0000]
xen: hack to prevent bad segment register reload

The hypervisor saves and restores the segment registers as part of the
state is saves while context switching.  If, during a context switch,
the next process doesn't use the TLS segments, it invalidates the GDT
entry, causing the segment register reload to fault.  This fault
effectively doubles the cost of a context switch.

This patch is a band-aid workaround which clears the usermode %gs
after it has been saved for the previous process, but before it gets
reloaded for the next, and it avoids having the hypervisor attempt to
erroneously reload it.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>

12 years agoxen: lazy-mmu operations
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:06 +0000]
xen: lazy-mmu operations

This patch uses the lazy-mmu hooks to batch mmu operations where
possible.  This is primarily useful for batching operations applied to
active pagetables, which happens during mprotect, munmap, mremap and
the like (mmap does not do bulk pagetable operations, so it isn't
helped).

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Acked-by: Chris Wright <chrisw@sous-sol.org>

12 years agoxen: Add support for preemption
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:06 +0000]
xen: Add support for preemption

Add Xen support for preemption.  This is mostly a cleanup of existing
preempt_enable/disable calls, or just comments to explain the current
usage.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>

12 years agoxen: SMP guest support
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:06 +0000]
xen: SMP guest support

This is a fairly straightforward Xen implementation of smp_ops.

Xen has its own IPI mechanisms, and has no dependency on any
APIC-based IPI.  The smp_ops hooks and the flush_tlb_others pv_op
allow a Xen guest to avoid all APIC code in arch/i386 (the only apic
operation is a single apic_read for the apic version number).

One subtle point which needs to be addressed is unpinning pagetables
when another cpu may have a lazy tlb reference to the pagetable. Xen
will not allow an in-use pagetable to be unpinned, so we must find any
other cpus with a reference to the pagetable and get them to shoot
down their references.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Cc: Benjamin LaHaise <bcrl@kvack.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Andi Kleen <ak@suse.de>

12 years agoxen: Implement sched_clock
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:05 +0000]
xen: Implement sched_clock

Implement xen_sched_clock, which returns the number of ns the current
vcpu has been actually in an unstolen state (ie, running or blocked,
vs runnable-but-not-running, or offline) since boot.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Acked-by: Chris Wright <chrisw@sous-sol.org>
Cc: john stultz <johnstul@us.ibm.com>

12 years agoxen: Account for stolen time
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:05 +0000]
xen: Account for stolen time

This patch accounts for the time stolen from our VCPUs.  Stolen time is
time where a vcpu is runnable and could be running, but all available
physical CPUs are being used for something else.

This accounting gets run on each timer interrupt, just as a way to get
it run relatively often, and when interesting things are going on.
Stolen time is not really used by much in the kernel; it is reported
in /proc/stats, and that's about it.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Acked-by: Chris Wright <chrisw@sous-sol.org>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Rik van Riel <riel@redhat.com>

12 years agoxen: ignore RW mapping of RO pages in pagetable_init
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:05 +0000]
xen: ignore RW mapping of RO pages in pagetable_init

When setting up the initial pagetable, which includes mappings of all
low physical memory, ignore a mapping which tries to set the RW bit on
an RO pte.  An RO pte indicates a page which is part of the current
pagetable, and so it cannot be allowed to become RW.

Once xen_pagetable_setup_done is called, set_pte reverts to its normal
behaviour.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Acked-by: Chris Wright <chrisw@sous-sol.org>
Cc: ebiederm@xmission.com (Eric W. Biederman)

12 years agoxen: Complete pagetable pinning
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:05 +0000]
xen: Complete pagetable pinning

Xen requires all active pagetables to be marked read-only.  When the
base of the pagetable is loaded into %cr3, the hypervisor validates
the entire pagetable and only allows the load to proceed if it all
checks out.

This is pretty slow, so to mitigate this cost Xen has a notion of
pinned pagetables.  Pinned pagetables are pagetables which are
considered to be active even if no processor's cr3 is pointing to is.
This means that it must remain read-only and all updates are validated
by the hypervisor.  This makes context switches much cheaper, because
the hypervisor doesn't need to revalidate the pagetable each time.

This also adds a new paravirt hook which is called during setup once
the zones and memory allocator have been initialized.  When the
init_mm pagetable is first built, the struct page array does not yet
exist, and so there's nowhere to put he init_mm pagetable's PG_pinned
flags.  Once the zones are initialized and the struct page array
exists, we can set the PG_pinned flags for those pages.

This patch also adds the Xen support for pte pages allocated out of
highmem (highpte) by implementing xen_kmap_atomic_pte.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Cc: Zach Amsden <zach@vmware.com>

12 years agoxen: add pinned page flag
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:05 +0000]
xen: add pinned page flag

Add a new definition for PG_owner_priv_1 to define PG_pinned on Xen
pagetable pages.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>

12 years agoxen: configuration
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:05 +0000]
xen: configuration

Put config options for Xen after the core pieces are in place.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>

12 years agoxen: time implementation
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:05 +0000]
xen: time implementation

Xen maintains a base clock which measures nanoseconds since system
boot.  This is provided to guests via a shared page which contains a
base time in ns, a tsc timestamp at that point and tsc frequency
parameters.  Guests can compute the current time by reading the tsc
and using it to extrapolate the current time from the basetime.  The
hypervisor makes sure that the frequency parameters are updated
regularly, paricularly if the tsc changes rate or stops.

This is implemented as a clocksource, so the interface to the rest of
the kernel is a simple clocksource which simply returns the current
time directly in nanoseconds.

Xen also provides a simple timer mechanism, which allows a timeout to
be set in the future.  When that time arrives, a timer event is sent
to the guest.  There are two timer interfaces:
 - An old one which also delivers a stream of (unused) ticks at 100Hz,
   and on the same event, the actual timer events.  The 100Hz ticks
   cause a lot of spurious wakeups, but are basically harmless.
 - The new timer interface doesn't have the 100Hz ticks, and can also
   fail if the specified time is in the past.

This code presents the Xen timer as a clockevent driver, and uses the
new interface by preference.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>

12 years agoxen: event channels
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:05 +0000]
xen: event channels

Xen implements interrupts in terms of event channels.  Each guest
domain gets 1024 event channels which can be used for a variety of
purposes, such as Xen timer events, inter-domain events,
inter-processor events (IPI) or for real hardware IRQs.

Within the kernel, we map the event channels to IRQs, and implement
the whole interrupt handling using a Xen irq_chip.

Rather than setting NR_IRQ to 1024 under PARAVIRT in order to
accomodate Xen, we create a dynamic mapping between event channels and
IRQs.  Ideally, Linux will eventually move towards dynamically
allocating per-irq structures, and we can use a 1:1 mapping between
event channels and irqs.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Eric W. Biederman <ebiederm@xmission.com>

12 years agoxen: virtual mmu
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:04 +0000]
xen: virtual mmu

Xen pagetable handling, including the machinery to implement direct
pagetables.

Xen presents the real CPU's pagetables directly to guests, with no
added shadowing or other layer of abstraction.  Naturally this means
the hypervisor must maintain close control over what the guest can put
into the pagetable.

When the guest modifies the pte/pmd/pgd, it must convert its
domain-specific notion of a "physical" pfn into a global machine frame
number (mfn) before inserting the entry into the pagetable.  Xen will
check to make sure the domain is allowed to create a mapping of the
given mfn.

Xen also requires that all mappings the guest has of its own active
pagetable are read-only.  This is relatively easy to implement in
Linux because all pagetables share the same pte pages for kernel
mappings, so updating the pte in one pagetable will implicitly update
the mapping in all pagetables.

Normally a pagetable becomes active when you point to it with cr3 (or
the Xen equivalent), but when you do so, Xen must check the whole
pagetable for correctness, which is clearly a performance problem.

Xen solves this with pinning which keeps a pagetable effectively
active even if its currently unused, which means that all the normal
update rules are enforced.  This means that it need not revalidate the
pagetable when loading cr3.

This patch has a first-cut implementation of pinning, but it is more
fully implemented in a later patch.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>

12 years agoxen: Core Xen implementation
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:04 +0000]
xen: Core Xen implementation

This patch is a rollup of all the core pieces of the Xen
implementation, including:
 - booting and setup
 - pagetable setup
 - privileged instructions
 - segmentation
 - interrupt flags
 - upcalls
 - multicall batching

BOOTING AND SETUP

The vmlinux image is decorated with ELF notes which tell the Xen
domain builder what the kernel's requirements are; the domain builder
then constructs the address space accordingly and starts the kernel.

Xen has its own entrypoint for the kernel (contained in an ELF note).
The ELF notes are set up by xen-head.S, which is included into head.S.
In principle it could be linked separately, but it seems to provoke
lots of binutils bugs.

Because the domain builder starts the kernel in a fairly sane state
(32-bit protected mode, paging enabled, flat segments set up), there's
not a lot of setup needed before starting the kernel proper.  The main
steps are:
  1. Install the Xen paravirt_ops, which is simply a matter of a
     structure assignment.
  2. Set init_mm to use the Xen-supplied pagetables (analogous to the
     head.S generated pagetables in a native boot).
  3. Reserve address space for Xen, since it takes a chunk at the top
     of the address space for its own use.
  4. Call start_kernel()

PAGETABLE SETUP

Once we hit the main kernel boot sequence, it will end up calling back
via paravirt_ops to set up various pieces of Xen specific state.  One
of the critical things which requires a bit of extra care is the
construction of the initial init_mm pagetable.  Because Xen places
tight constraints on pagetables (an active pagetable must always be
valid, and must always be mapped read-only to the guest domain), we
need to be careful when constructing the new pagetable to keep these
constraints in mind.  It turns out that the easiest way to do this is
use the initial Xen-provided pagetable as a template, and then just
insert new mappings for memory where a mapping doesn't already exist.

This means that during pagetable setup, it uses a special version of
xen_set_pte which ignores any attempt to remap a read-only page as
read-write (since Xen will map its own initial pagetable as RO), but
lets other changes to the ptes happen, so that things like NX are set
properly.

PRIVILEGED INSTRUCTIONS AND SEGMENTATION

When the kernel runs under Xen, it runs in ring 1 rather than ring 0.
This means that it is more privileged than user-mode in ring 3, but it
still can't run privileged instructions directly.  Non-performance
critical instructions are dealt with by taking a privilege exception
and trapping into the hypervisor and emulating the instruction, but
more performance-critical instructions have their own specific
paravirt_ops.  In many cases we can avoid having to do any hypercalls
for these instructions, or the Xen implementation is quite different
from the normal native version.

The privileged instructions fall into the broad classes of:
  Segmentation: setting up the GDT and the GDT entries, LDT,
     TLS and so on.  Xen doesn't allow the GDT to be directly
     modified; all GDT updates are done via hypercalls where the new
     entries can be validated.  This is important because Xen uses
     segment limits to prevent the guest kernel from damaging the
     hypervisor itself.
  Traps and exceptions: Xen uses a special format for trap entrypoints,
     so when the kernel wants to set an IDT entry, it needs to be
     converted to the form Xen expects.  Xen sets int 0x80 up specially
     so that the trap goes straight from userspace into the guest kernel
     without going via the hypervisor.  sysenter isn't supported.
  Kernel stack: The esp0 entry is extracted from the tss and provided to
     Xen.
  TLB operations: the various TLB calls are mapped into corresponding
     Xen hypercalls.
  Control registers: all the control registers are privileged.  The most
     important is cr3, which points to the base of the current pagetable,
     and we handle it specially.

Another instruction we treat specially is CPUID, even though its not
privileged.  We want to control what CPU features are visible to the
rest of the kernel, and so CPUID ends up going into a paravirt_op.
Xen implements this mainly to disable the ACPI and APIC subsystems.

INTERRUPT FLAGS

Xen maintains its own separate flag for masking events, which is
contained within the per-cpu vcpu_info structure.  Because the guest
kernel runs in ring 1 and not 0, the IF flag in EFLAGS is completely
ignored (and must be, because even if a guest domain disables
interrupts for itself, it can't disable them overall).

(A note on terminology: "events" and interrupts are effectively
synonymous.  However, rather than using an "enable flag", Xen uses a
"mask flag", which blocks event delivery when it is non-zero.)

There are paravirt_ops for each of cli/sti/save_fl/restore_fl, which
are implemented to manage the Xen event mask state.  The only thing
worth noting is that when events are unmasked, we need to explicitly
see if there's a pending event and call into the hypervisor to make
sure it gets delivered.

UPCALLS

Xen needs a couple of upcall (or callback) functions to be implemented
by each guest.  One is the event upcalls, which is how events
(interrupts, effectively) are delivered to the guests.  The other is
the failsafe callback, which is used to report errors in either
reloading a segment register, or caused by iret.  These are
implemented in i386/kernel/entry.S so they can jump into the normal
iret_exc path when necessary.

MULTICALL BATCHING

Xen provides a multicall mechanism, which allows multiple hypercalls
to be issued at once in order to mitigate the cost of trapping into
the hypervisor.  This is particularly useful for context switches,
since the 4-5 hypercalls they would normally need (reload cr3, update
TLS, maybe update LDT) can be reduced to one.  This patch implements a
generic batching mechanism for hypercalls, which gets used in many
places in the Xen code.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Cc: Ian Pratt <ian.pratt@xensource.com>
Cc: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
Cc: Adrian Bunk <bunk@stusta.de>

12 years agoxen: Add Xen interface header files
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:04 +0000]
xen: Add Xen interface header files

Add Xen interface header files. These are taken fairly directly from
the Xen tree, but somewhat rearranged to suit the kernel's conventions.

Define macros and inline functions for doing hypercalls into the
hypervisor.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Ian Pratt <ian.pratt@xensource.com>
Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>

12 years agoAdd nosegneg capability to the vsyscall page notes
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:04 +0000]
Add nosegneg capability to the vsyscall page notes

Add the "nosegneg" fake capabilty to the vsyscall page notes. This is
used by the runtime linker to select a glibc version which then
disables negative-offset accesses to the thread-local segment via
%gs. These accesses require emulation in Xen (because segments are
truncated to protect the hypervisor address space) and avoiding them
provides a measurable performance boost.

Signed-off-by: Ian Pratt <ian.pratt@xensource.com>
Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Acked-by: Zachary Amsden <zach@vmware.com>
Cc: Roland McGrath <roland@redhat.com>
Cc: Ulrich Drepper <drepper@redhat.com>

12 years agoAdd a sched_clock paravirt_op
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:04 +0000]
Add a sched_clock paravirt_op

The tsc-based get_scheduled_cycles interface is not a good match for
Xen's runstate accounting, which reports everything in nanoseconds.

This patch replaces this interface with a sched_clock interface, which
matches both Xen and VMI's requirements.

In order to do this, we:
   1. replace get_scheduled_cycles with sched_clock
   2. hoist cycles_2_ns into a common header
   3. update vmi accordingly

One thing to note: because sched_clock is implemented as a weak
function in kernel/sched.c, we must define a real function in order to
override this weak binding.  This means the usual paravirt_ops
technique of using an inline function won't work in this case.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Zachary Amsden <zach@vmware.com>
Cc: Dan Hecht <dhecht@vmware.com>
Cc: john stultz <johnstul@us.ibm.com>

12 years agoparavirt: helper to disable all IO space
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:04 +0000]
paravirt: helper to disable all IO space

In a virtual environment, device drivers such as legacy IDE will waste
quite a lot of time probing for their devices which will never appear.
This helper function allows a paravirt implementation to lay claim to
the whole iomem and ioport space, thereby disabling all device drivers
trying to claim IO resources.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>

12 years agoAllocate and free vmalloc areas
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:04 +0000]
Allocate and free vmalloc areas

Allocate/release a chunk of vmalloc address space:
 alloc_vm_area reserves a chunk of address space, and makes sure all
 the pagetables are constructed for that address range - but no pages.

 free_vm_area releases the address space range.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Ian Pratt <ian.pratt@xensource.com>
Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Cc: "Jan Beulich" <JBeulich@novell.com>
Cc: "Andi Kleen" <ak@muc.de>

12 years agoparavirt: export __supported_pte_mask
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:04 +0000]
paravirt: export __supported_pte_mask

__supported_pte_mask is needed when constructing pte values.  Xen
device drivers need to do this to make mappings of foreign pages (ie,
pages granted to us by other domains).

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>

12 years agoparavirt: make siblingmap functions visible
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:03 +0000]
paravirt: make siblingmap functions visible

Paravirt implementations need to set the sibling map on new cpus.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>

12 years agoparavirt: unstatic smp_store_cpu_info
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:03 +0000]
paravirt: unstatic smp_store_cpu_info

Paravirt implementations need to store cpu info when bringing up cpus.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>

12 years agoparavirt: unstatic leave_mm
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:03 +0000]
paravirt: unstatic leave_mm

Make globally leave_mm visible, specifically so that Xen can use it to
shoot-down lazy uses of cr3.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>

12 years agoparavirt: increase IRQ limit
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:03 +0000]
paravirt: increase IRQ limit

When running with CONFIG_PARAVIRT, we may want lots of IRQs even if
there's no IO APIC.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>

12 years agoparavirt: add a hook for once the allocator is ready
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:03 +0000]
paravirt: add a hook for once the allocator is ready

Add a hook so that the paravirt backend knows when the allocator is
ready.  This is useful for the obvious reason that the allocator is
available, but the other side-effect of having the bootmem allocator
available is that each page now has an associated "struct page".

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>

12 years agoparavirt: add an "mm" argument to alloc_pt
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:03 +0000]
paravirt: add an "mm" argument to alloc_pt

It's useful to know which mm is allocating a pagetable.  Xen uses this
to determine whether the pagetable being added to is pinned or not.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>

12 years agouse elfnote.h to generate vsyscall notes.
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:03 +0000]
use elfnote.h to generate vsyscall notes.

Use existing elfnote.h to generate vsyscall notes, rather than doing
it locally.  Changes elfnote.h a bit to suit, since this is the first
asm user, and it wasn't quite right.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Roland McGrath <roland@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.com>

12 years agousermodehelper: Tidy up waiting
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:03 +0000]
usermodehelper: Tidy up waiting

Rather than using a tri-state integer for the wait flag in
call_usermodehelper_exec, define a proper enum, and use that.  I've
preserved the integer values so that any callers I've missed should
still work OK.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Andi Kleen <ak@suse.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Joel Becker <joel.becker@oracle.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Cc: Srivatsa Vaddagiri <vatsa@in.ibm.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: David Howells <dhowells@redhat.com>

12 years agoAdd common orderly_poweroff()
Jeremy Fitzhardinge [Wed, 18 Jul 2007 01:37:02 +0000]
Add common orderly_poweroff()

Various pieces of code around the kernel want to be able to trigger an
orderly poweroff.  This pulls them together into a single
implementation.

By default the poweroff command is /sbin/poweroff, but it can be set
via sysctl: kernel/poweroff_cmd.  This is split at whitespace, so it
can include command-line arguments.

This patch replaces four other instances of invoking either "poweroff"
or "shutdown -h now": two sbus drivers, and acpi thermal
management.

sparc64 has its own "powerd"; still need to determine whether it should
be replaced by orderly_poweroff().

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Acked-by: Len Brown <lenb@kernel.org>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: David S. Miller <davem@davemloft.net>