87799 Commits

Author SHA1 Message Date
Linus Torvalds
40031da445 ACPI and power management updates for 3.12-rc1
1) ACPI-based PCI hotplug (ACPIPHP) subsystem rework and introduction
     of Intel Thunderbolt support on systems that use ACPI for signalling
     Thunderbolt hotplug events.  This also should make ACPIPHP work in
     some cases in which it was known to have problems.  From
     Rafael J Wysocki, Mika Westerberg and Kirill A Shutemov.
 
  2) ACPI core code cleanups and dock station support cleanups from
     Jiang Liu and Rafael J Wysocki.
 
  3) Fixes for locking problems related to ACPI device hotplug from
     Rafael J Wysocki.
 
  4) ACPICA update to version 20130725 includig fixes, cleanups, support
     for more than 256 GPEs per GPE block and a change to make the ACPI
     PM Timer optional (we've seen systems without the PM Timer in the
     field already).  One of the fixes, related to the DeRefOf operator,
     is necessary to prevent some Windows 8 oriented AML from causing
     problems to happen.  From Bob Moore, Lv Zheng, and Jung-uk Kim.
 
  5) Removal of the old and long deprecated /proc/acpi/event interface
     and related driver changes from Thomas Renninger.
 
  6) ACPI and Xen changes to make the reduced hardware sleep work with
     the latter from Ben Guthro.
 
  7) ACPI video driver cleanups and a blacklist of systems that should
     not tell the BIOS that they are compatible with Windows 8 (or ACPI
     backlight and possibly other things will not work on them).  From
     Felipe Contreras.
 
  8) Assorted ACPI fixes and cleanups from Aaron Lu, Hanjun Guo,
     Kuppuswamy Sathyanarayanan, Lan Tianyu, Sachin Kamat, Tang Chen,
     Toshi Kani, and Wei Yongjun.
 
  9) cpufreq ondemand governor target frequency selection change to
     reduce oscillations between min and max frequencies (essentially,
     it causes the governor to choose target frequencies proportional
     to load) from Stratos Karafotis.
 
 10) cpufreq fixes allowing sysfs attributes file permissions to be
     preserved over suspend/resume cycles Srivatsa S Bhat.
 
 11) Removal of Device Tree parsing for CPU device nodes from multiple
     cpufreq drivers that required some changes related to
     of_get_cpu_node() to be made in a few architectures and in the
     driver core.  From Sudeep KarkadaNagesha.
 
 12) cpufreq core fixes and cleanups related to mutual exclusion and
     driver module references from Viresh Kumar, Lukasz Majewski and
     Rafael J Wysocki.
 
 13) Assorted cpufreq fixes and cleanups from Amit Daniel Kachhap,
     Bartlomiej Zolnierkiewicz, Hanjun Guo, Jingoo Han, Joseph Lo,
     Julia Lawall, Li Zhong, Mark Brown, Sascha Hauer, Stephen Boyd,
     Stratos Karafotis, and Viresh Kumar.
 
 14) Fixes to prevent race conditions in coupled cpuidle from happening
     from Colin Cross.
 
 15) cpuidle core fixes and cleanups from Daniel Lezcano and
     Tuukka Tikkanen.
 
 16) Assorted cpuidle fixes and cleanups from Daniel Lezcano,
     Geert Uytterhoeven, Jingoo Han, Julia Lawall, Linus Walleij,
     and Sahara.
 
 17) System sleep tracing changes from Todd E Brandt and Shuah Khan.
 
 18) PNP subsystem conversion to using struct dev_pm_ops for power
     management from Shuah Khan.
 
 /
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Merge tag 'pm+acpi-3.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI and power management updates from Rafael Wysocki:

 1) ACPI-based PCI hotplug (ACPIPHP) subsystem rework and introduction
    of Intel Thunderbolt support on systems that use ACPI for signalling
    Thunderbolt hotplug events.  This also should make ACPIPHP work in
    some cases in which it was known to have problems.  From
    Rafael J Wysocki, Mika Westerberg and Kirill A Shutemov.

 2) ACPI core code cleanups and dock station support cleanups from
    Jiang Liu and Rafael J Wysocki.

 3) Fixes for locking problems related to ACPI device hotplug from
    Rafael J Wysocki.

 4) ACPICA update to version 20130725 includig fixes, cleanups, support
    for more than 256 GPEs per GPE block and a change to make the ACPI
    PM Timer optional (we've seen systems without the PM Timer in the
    field already).  One of the fixes, related to the DeRefOf operator,
    is necessary to prevent some Windows 8 oriented AML from causing
    problems to happen.  From Bob Moore, Lv Zheng, and Jung-uk Kim.

 5) Removal of the old and long deprecated /proc/acpi/event interface
    and related driver changes from Thomas Renninger.

 6) ACPI and Xen changes to make the reduced hardware sleep work with
    the latter from Ben Guthro.

 7) ACPI video driver cleanups and a blacklist of systems that should
    not tell the BIOS that they are compatible with Windows 8 (or ACPI
    backlight and possibly other things will not work on them).  From
    Felipe Contreras.

 8) Assorted ACPI fixes and cleanups from Aaron Lu, Hanjun Guo,
    Kuppuswamy Sathyanarayanan, Lan Tianyu, Sachin Kamat, Tang Chen,
    Toshi Kani, and Wei Yongjun.

 9) cpufreq ondemand governor target frequency selection change to
    reduce oscillations between min and max frequencies (essentially,
    it causes the governor to choose target frequencies proportional
    to load) from Stratos Karafotis.

10) cpufreq fixes allowing sysfs attributes file permissions to be
    preserved over suspend/resume cycles Srivatsa S Bhat.

11) Removal of Device Tree parsing for CPU device nodes from multiple
    cpufreq drivers that required some changes related to
    of_get_cpu_node() to be made in a few architectures and in the
    driver core.  From Sudeep KarkadaNagesha.

12) cpufreq core fixes and cleanups related to mutual exclusion and
    driver module references from Viresh Kumar, Lukasz Majewski and
    Rafael J Wysocki.

13) Assorted cpufreq fixes and cleanups from Amit Daniel Kachhap,
    Bartlomiej Zolnierkiewicz, Hanjun Guo, Jingoo Han, Joseph Lo,
    Julia Lawall, Li Zhong, Mark Brown, Sascha Hauer, Stephen Boyd,
    Stratos Karafotis, and Viresh Kumar.

14) Fixes to prevent race conditions in coupled cpuidle from happening
    from Colin Cross.

15) cpuidle core fixes and cleanups from Daniel Lezcano and
    Tuukka Tikkanen.

16) Assorted cpuidle fixes and cleanups from Daniel Lezcano,
    Geert Uytterhoeven, Jingoo Han, Julia Lawall, Linus Walleij,
    and Sahara.

17) System sleep tracing changes from Todd E Brandt and Shuah Khan.

18) PNP subsystem conversion to using struct dev_pm_ops for power
    management from Shuah Khan.

* tag 'pm+acpi-3.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (217 commits)
  cpufreq: Don't use smp_processor_id() in preemptible context
  cpuidle: coupled: fix race condition between pokes and safe state
  cpuidle: coupled: abort idle if pokes are pending
  cpuidle: coupled: disable interrupts after entering safe state
  ACPI / hotplug: Remove containers synchronously
  driver core / ACPI: Avoid device hot remove locking issues
  cpufreq: governor: Fix typos in comments
  cpufreq: governors: Remove duplicate check of target freq in supported range
  cpufreq: Fix timer/workqueue corruption due to double queueing
  ACPI / EC: Add ASUSTEK L4R to quirk list in order to validate ECDT
  ACPI / thermal: Add check of "_TZD" availability and evaluating result
  cpufreq: imx6q: Fix clock enable balance
  ACPI: blacklist win8 OSI for buggy laptops
  cpufreq: tegra: fix the wrong clock name
  cpuidle: Change struct menu_device field types
  cpuidle: Add a comment warning about possible overflow
  cpuidle: Fix variable domains in get_typical_interval()
  cpuidle: Fix menu_device->intervals type
  cpuidle: CodingStyle: Break up multiple assignments on single line
  cpuidle: Check called function parameter in get_typical_interval()
  ...
2013-09-03 15:59:39 -07:00
Ganesan Ramalingam
1cf0e1be81 MIPS: Netlogic: Built-in DTB for XLP2xx SoC boards
Add a default built-in device tree for XLP2xx SoC. The new file
xlp_fvp.dts has updated entries for I2C and memory.

Signed-off-by: Ganesan Ramalingam <ganesanr@broadcom.com>
Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5705/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-09-03 23:22:20 +02:00
Ganesan Ramalingam
9eac3591e7 MIPS: Netlogic: Add support for USB on XLP2xx
Add USB intialization code to handle the new XLP2XX USB 3.0 block.
This adds xlp/usb-init-xlp2.c to initialize the XLP2XX USB glue-logic
for XHCI and EHCI. Interrupt and IO offset code in xlp-hal/iomap.h
and xlp/nlm_hal.c is also updated for the new USB block.

Signed-off-by: Ganesan Ramalingam <ganesanr@broadcom.com>
Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5744/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-09-03 23:22:20 +02:00
Ganesan Ramalingam
e5be1fd007 MIPS: Netlogic: XLP2xx update for I2C controller
XLP2xx has a new I2C controller which has 4 buses connected to
it. Update the IO offset and IRQ mapping code to reflect this.

Signed-off-by: Ganesan Ramalingam <ganesanr@broadcom.com>
Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5707/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-09-03 23:22:20 +02:00
Jayachandran C
c49e42aba8 MIPS: Netlogic: Core wakeup changes for XLP2XX
On XLP2xx, wakeup code does not need to enable clock on the core.
Update xlp/wakeup.c to handle this.

Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5703/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-09-03 23:22:19 +02:00
Ganesan Ramalingam
57ceb4b020 MIPS: Netlogic: XLP2XX CPU and PIC frequency
Add code to calculate the CPU and PIC frequency for XLP2XX SoCs.

Since the PIC frequency on XLP2XX can be configured, add a new macro
pic_timer_freq() to be used in netlogic/common/time.c.

Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Cc: linux-mips@linux-mips.org
Cc: Ganesan Ramalingam <ganesanr@broadcom.com>
Patchwork: http://patchwork.linux-mips.org/patch/5701/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-09-03 23:22:19 +02:00
Jayachandran C
5b6ff35d33 MIPS: Netlogic: Call xlp_mmu_init on all threads
The config7/config4 register has to be written on all the threads.
This does not cause any problems in XLP, but is needed for XLPII

Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5700/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-09-03 23:22:19 +02:00
Jayachandran C
4ca86a2ff3 MIPS: Netlogic: Add support for XLP2XX
XLP2XX is first in the series of 28nm XLPII processors.

The changes are to:
* Add processor ID for XLP2XX to asm/cpu.h and kernel/cpu-probe.c.
* Add a cpu_is_xlpii() function to check for XLPII processors.
* Update xlp_mmu_init() to use config4 to enable extended TLB.

Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5698/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-09-03 23:22:19 +02:00
Jayachandran C
13314a91f0 MIPS: Netlogic: Fix DT flash size parameter
The flash chipselects can span 32MB, fix this in the built-in device
tree.

Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5704/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-09-03 23:22:18 +02:00
Jayachandran C
4f848ba5a0 MIPS: Netlogic: Remove memory section from built-in DT
Do not pass a memory section in the built-in DTB, and let the
boot code use the values from the DRAM BARs.

Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5699/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-09-03 23:22:18 +02:00
Jayachandran C
a2ba6cd6e6 MIPS: Netlogic: Read memory from DRAM BARs
Read the memory from the Bridge DRAM BARs, if it is not passed in
from the device tree. This will allow us to remove memory configuration
from built in device trees.

Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5743/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-09-03 23:22:18 +02:00
Gabor Juhos
2c4f1ac562 MIPS: ath79: Switch to the clkdev framework
The ath79 code uses static clock devices and
provides its own clk_{get,put} implementations.

Change the code to use dynamically allocated
clock devices and register the clocks within
the clkdev framework.

Additionally, remove the local clk_{get,put}
implementation. The clkdev framework has a
common implementation of those.

Also move the call of ath79_clock_init() from
plat_mem_init() to plat_time_init(). Otherwise
it would not be possible to use memory allocation
functions from ath79clock_init() becasuse the
memory subsystem is not yet initialized when
plat_mem_init() runs.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5780/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-09-03 23:22:18 +02:00
Gabor Juhos
6612a6885b MIPS: ath79: Use local variables for clock rates
Use local variables for ref, cpu, ddr and ahb
rates in SoC specific clock init functions.

The patch has no functional changes, it is
an interim change in preparation of the next
patch.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5781/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-09-03 23:22:18 +02:00
Gabor Juhos
59a8c10b25 MIPS: ath79: Use ath79_get_sys_clk_rate to get basic clock rates
Instead of accessing the rate field of the static
clock devices directly, use the recently introduced
helper function to get the rate of the basic clocks.

The static ath79_{ahb,cpu,ddr,ref}_clk variables
will be removed by a subsequent patch. The actual
change is in preparation of that.

Also move the clock frequency printing code into
the plat_time_init function. We are getting the
cpu clock rate there already so we can save an
extra call of the helper.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5782/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-09-03 23:22:17 +02:00
Gabor Juhos
2310780244 MIPS: ath79: Use a helper function to get system clock rates
The ath79 platform uses similar code to get the
rate of various clocks during init. Separate the
similar code into a new helper function and use
that to avoid code duplication.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5778/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-09-03 23:22:17 +02:00
Gabor Juhos
837f036c8a MIPS: ath79: Use local ref clock rate in ar934x_get_pll_freq
The reference clock rate is passed in the first
argument of the function. Use that instead of the
rate of the global ath79_ref_clk variable.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5779/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-09-03 23:22:17 +02:00
Felix Fietkau
a1191927ac MIPS: ath79: Fix ar933x watchdog clock
The watchdog device on the AR933x is connected to
the AHB clock, however the current code uses the
reference clock. Due to the wrong rate, the watchdog
driver can't calculate correct register values for
a given timeout value and the watchdog unexpectedly
restarts the system.

The code uses the wrong value since the initial
commit 04225e1d227c8e68d685936ecf42ac175fec0e54
(MIPS: ath79: add AR933X specific clock init)

The patch fixes the code to use the correct clock
rate to avoid the problem.

Cc: stable@vger.kernel.org
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Cc: linux-mips@linux-mips.org
Cc: stable@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/5777/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-09-03 23:22:16 +02:00
Gabor Juhos
70c3c4cd2d MIPS: ath79: Don't hardwire cpu_has_dsp{2} to 0
The ath79 code supports various SoCs which are using either a 24Kc
or a 74Kc core. The 74Kc core has DSP support, so don't hardwire
the values to zero.

Commit 00dc5ce2a653a332190aa29b2e1f3bceaa7d5b8d (MIPS: ath79: don't
hardcode the unavailability of the DSP ASE) has fixed this already,
but that change got reverted by 475032564ed96c94c085e3e7a90e07d150a7cec9
(MIPS: Hardwire detection of DSP ASE Rev 2 for systems, as required.)

Reported-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5750/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-09-03 23:22:16 +02:00
John Crispin
9d9a49ab32 MIPS: Lantiq: Add defconfig for xway SoC
This add a default config for the Lantiq XWAY SoC.

Signed-off-by: John Crispin <blogic@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5796/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-09-03 23:22:16 +02:00
Thomas Langer
df8b5bed1b MIPS: Lantiq: Falcon: fix asc clock definition
The clocks of the serial ports were not setup properly.

Signed-off-by: Thomas Langer <thomas.langer@lantiq.com>
Acked-by: John Crispin <blogic@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5659/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-09-03 23:22:16 +02:00
Thomas Langer
362b34faef MIPS: Lantiq: Falcon: add cpu-feature-override.h
Add cpu-feature-override.h for the GPON SoC

Signed-off-by: Thomas Langer <thomas.langer@lantiq.com>
Acked-by: John Crispin <blogic@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5658/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-09-03 23:22:16 +02:00
John Crispin
45d3f186cf MIPS: Lantiq: Adds minimal dcdc driver
This driver so far only reads the core voltage.

Signed-off-by: John Crispin <blogic@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5677/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-09-03 23:22:15 +02:00
Chris Metcalf
b40f451d56 tile PCI RC: make default consistent DMA mask 32-bit
This change sets the PCI devices' initial DMA capabilities
conservatively and promotes them at the request of the driver,
as opposed to assuming advanced DMA capabilities. The old design
runs the risk of breaking drivers that assume default capabilities.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2013-09-03 14:53:37 -04:00
Wang Sheng-Hui
6d715790ef tile: add null check for kzalloc in tile/kernel/setup.c
Should check the return value of kzalloc first to avoid the null pointer.
Then can dereference the non-null pointer to access the fields of struct
resource.

Signed-off-by: Wang Sheng-Hui <shhuiw@gmail.com>
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2013-09-03 14:53:34 -04:00
Chris Metcalf
ce61cdc270 tile: make __write_once a synonym for __read_mostly
This was really only useful for TILE64 when we mapped the
kernel data with small pages. Now we use a huge page and we
really don't want to map different parts of the kernel
data in different ways.

We retain the __write_once name in case we want to bring
it back to life at some point in the future.

Note that this change uncovered a latent bug where the
"smp_topology" variable happened to always be aligned mod 8
so we could store two "int" values at once, but when we
eliminated __write_once it ended up only aligned mod 4.
Fix with an explicit annotation.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2013-09-03 14:53:32 -04:00
Chris Metcalf
d7c9661115 tile: remove support for TILE64
This chip is no longer being actively developed for (it was superceded
by the TILEPro64 in 2008), and in any case the existing compiler and
toolchain in the community do not support it.  It's unlikely that the
kernel works with TILE64 at this point as the configuration has not been
tested in years.  The support is also awkward as it requires maintaining
a significant number of ifdefs.  So, just remove it altogether.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2013-09-03 14:53:29 -04:00
Akinobu Mita
d6a0aa314c tile: use asm-generic/bitops/builtin-*.h
The definisions of __ffs(), __fls(), and ffs() for tile are almost same
as asm-generic/bitops-*.h.  The only difference is that it is defined
as __always_inline or inline.  So this switches to use those headers.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> [moved #includes to end]
2013-09-03 14:53:27 -04:00
Chris Metcalf
f6f380dff6 tile: eliminate no-op "noatomichash" boot argument
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2013-09-03 14:53:24 -04:00
Chris Metcalf
a0099303cd tile: use standard tile_bundle_bits type in traps.c
We were rolling our own bundle_bits, which is unnecessary.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2013-09-03 14:53:22 -04:00
Chris Metcalf
43b7f2fb58 tile: simplify code referencing hypervisor API addresses
There's no need to make up new ways of computing the addresses
of the Tilera hypervisor APIs; just use the standard method
of relying on the symbols to provide the addresses.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2013-09-03 14:53:20 -04:00
Chris Metcalf
850a45209d tile: change <asm/system.h> to <asm/switch_to.h> in comments
Also fix mentions of it in #error statements.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2013-09-03 14:53:17 -04:00
Chris Metcalf
7b770a6a0a tile: mark pcibios_init() as __init
It was bombed away because it was previously marked as __devinit,
but it should be an __init function.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2013-09-03 14:53:15 -04:00
Chris Metcalf
9a55fed473 tile: check for correct compiler earlier in asm-offsets.c
If we wait until after including a bunch of other files, we
will have generated so much warning spew that it's hard to
notice the error about using the wrong compiler.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2013-09-03 14:53:09 -04:00
Chris Metcalf
729b25a464 tile: use standard 'generic-y' model for <asm/hw_irq.h>
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2013-09-03 14:52:25 -04:00
Chris Metcalf
4c63de8df0 tile: use asm-generic version of <asm/local64.h>
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2013-09-03 14:52:22 -04:00
Chris Metcalf
5e7705df28 tile PCI RC: add comment about "PCI hole" problem
Explain the rationale of not overlapping the 64-bit DMA window
with the PA range.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2013-09-03 14:52:20 -04:00
Chris Metcalf
bdb8205455 tile: remove DEBUG_EXTRA_FLAGS kernel config option
It isn't used any more by us now that the generic kernel build
offers DEBUG_INFO_REDUCED, so just get rid of it.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2013-09-03 14:52:17 -04:00
Chris Metcalf
640710a33b tile: add virt_to_kpte() API and clean up and document behavior
We use virt_to_pte(NULL, va) a lot, which isn't very obvious.
I added virt_to_kpte(va) as a more obvious wrapper function,
that also validates the va as being a kernel adddress.

And, I fixed the semantics of virt_to_pte() so that we handle
the pud and pmd the same way, and we now document the fact that
we handle the final pte level differently.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2013-09-03 14:52:13 -04:00
Chris Metcalf
49cf78ef7b tile: support FRAME_POINTER
Allow enabling frame pointer support; this makes it easier to hook
into the various kernel features that claim they require it without
having to add Kconfig conditionals everywhere (a la mips, ppc, s390,
and microblaze).  When enabled, it basically eliminates leaf functions
as such, and stops optimizing tail and sibling calls.  It adds around
3% to the size of the kernel when enabled.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2013-09-03 14:52:09 -04:00
Chris Metcalf
80f184108e tile: support reporting Tilera hypervisor statistics
Newer hypervisors have an API for reporting per-cpu statistics
information.  This change allows seeing that information via
/sys/devices/system/cpu/cpuN/hv_stats file for each core.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2013-09-03 14:51:36 -04:00
Chris Metcalf
8157107b13 tilegx: support KGDB
Enter kernel debugger at boot with:
  --hvd UART_1=1 --hvx kgdbwait --hvx kgdboc=ttyS1,115200
or at runtime with:
  echo ttyS1,115200 > /sys/module/kgdboc/parameters/kgdboc
  echo g > /proc/sysrq-trigger

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2013-09-03 14:51:26 -04:00
Chris Metcalf
6ec006ede5 tilegx: provide kernel support for the tilegx UART shim
The TILE-Gx chip includes an on-chip UART.  This change adds support
for using the UART from within the kernel.  The UART shim has more
functionality than is exposed here, but to keep the kernel code and
binary simpler, this is a subset of the full API designed to enable
a standard Linux tty serial driver only.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2013-09-03 14:50:36 -04:00
Chris Metcalf
acbde1db29 tile: parameterize VA and PA space more cleanly
The existing code relied on the hardware definition (<arch/chip.h>)
to specify how much VA and PA space was available.  It's convenient
to allow customizing this for some configurations, so provide symbols
MAX_PA_WIDTH and MAX_VA_WIDTH in <asm/page.h> that can be modified
if desired.

Additionally, move away from the MEM_XX_INTRPT nomenclature to
define the start of various regions within the VA space.  In fact
the cleaner symbol is, for example, MEM_SV_START, to indicate the
start of the area used for supervisor code; the actual address of the
interrupt vectors is not as important, and can be changed if desired.
As part of this change, convert from "intrpt1" nomenclature (which
built in the old privilege-level 1 model) to a simple "intrpt".

Also strip out some tilepro-specific code supporting modifying the
PL the kernel could run at, since we don't actually support using
different PLs in tilepro, only tilegx.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2013-09-03 14:47:34 -04:00
Chris Metcalf
051168df52 tile: don't assume user privilege is zero
Technically, user privilege is anything less than kernel
privilege.  We modify the existing user_mode() macro to have
this semantic (and use it in a couple of places it wasn't being
used before), and add an IS_KERNEL_EX1() macro to the assembly
code as well.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2013-09-03 14:45:52 -04:00
Linus Torvalds
2f01ea908b TTY/Serial driver patches for 3.12-rc1
Here's the big tty/serial driver pull request for 3.12-rc1.
 
 Lots of n_tty reworks to resolve some very long-standing issues, removing the
 3-4 different locks that were taken for every character.  This code has been
 beaten on for a long time in linux-next with no reported regressions.
 
 Other than that, a range of serial and tty driver updates and revisions.  Full
 details in the shortlog.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-3.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial driver patches from Greg KH:
 "Here's the big tty/serial driver pull request for 3.12-rc1.

  Lots of n_tty reworks to resolve some very long-standing issues,
  removing the 3-4 different locks that were taken for every character.
  This code has been beaten on for a long time in linux-next with no
  reported regressions.

  Other than that, a range of serial and tty driver updates and
  revisions.  Full details in the shortlog"

* tag 'tty-3.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (226 commits)
  hvc_xen: Remove unnecessary __GFP_ZERO from kzalloc
  serial: imx: initialize the local variable
  tty: ar933x_uart: add device tree support and binding documentation
  tty: ar933x_uart: allow to build the driver as a module
  ARM: dts: msm: Update uartdm compatible strings
  devicetree: serial: Document msm_serial bindings
  serial: unify serial bindings into a single dir
  serial: fsl-imx-uart: Cleanup duplicate device tree binding
  tty: ar933x_uart: use config_enabled() macro to clean up ifdefs
  tty: ar933x_uart: remove superfluous assignment of ar933x_uart_driver.nr
  tty: ar933x_uart: use the clk API to get the uart clock
  tty: serial: cpm_uart: Adding proper request of GPIO used by cpm_uart driver
  serial: sirf: fix the amount of serial ports
  serial: sirf: define macro for some magic numbers of USP
  serial: icom: move array overflow checks earlier
  TTY: amiserial, remove unnecessary platform_set_drvdata()
  serial: st-asc: remove unnecessary platform_set_drvdata()
  msm_serial: Send more than 1 character on the console w/ UARTDM
  msm_serial: Add support for non-GSBI UARTDM devices
  msm_serial: Switch clock consumer strings and simplify code
  ...
2013-09-03 11:38:36 -07:00
Linus Torvalds
751144271f staging tree merge for 3.12-rc1
Here's the bit staging tree pull request for 3.12-rc1.
 
 Lots of staging driver updates, and fixes.  Lustre is finally enabled in
 the build, and lots of cleanup started happening in it.  There's a new
 wireless driver in here, and 2 new TTY drivers, which cause the overall
 lines added/removed to be quite large on the "added" side.
 
 The IIO driver updates are also coming through here, as they are tied to
 the staging iio drivers.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-3.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging tree merge from Greg KH:
 "Here's the bit staging tree pull request for 3.12-rc1.

  Lots of staging driver updates, and fixes.  Lustre is finally enabled
  in the build, and lots of cleanup started happening in it.  There's a
  new wireless driver in here, and 2 new TTY drivers, which cause the
  overall lines added/removed to be quite large on the "added" side.

  The IIO driver updates are also coming through here, as they are tied
  to the staging iio drivers"

* tag 'staging-3.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (942 commits)
  staging: dwc2: make dwc2_core_params documentation more complete
  staging: dwc2: validate the value for phy_utmi_width
  staging: dwc2: interpret all hwcfg and related register at init time
  staging: dwc2: properly mask the GRXFSIZ register
  staging: dwc2: remove redundant register reads
  staging: dwc2: re-use hptxfsiz variable
  staging: dwc2: simplify debug output in dwc_hc_init
  staging: dwc2: add missing shift
  staging: dwc2: simplify register shift expressions
  staging: dwc2: only read the snpsid register once
  staging: dwc2: unshift non-bool register value constants
  staging: dwc2: fix off-by-one in check for max_packet_count parameter
  staging: dwc2: remove specific fifo size constants
  Staging:BCM:DDRInit.c:Renaming __FUNCTION__
  staging: bcm: remove Version.h file.
  staging: rtl8188eu: off by one in rtw_set_802_11_add_wep()
  staging: r8188eu: copying one byte too much
  staging: rtl8188eu: || vs && typo
  staging: r8188eu: off by one bugs
  staging: crystalhd: Resolve sparse 'different base types' warnings.
  ...
2013-09-03 11:37:57 -07:00
Linus Torvalds
542a086ac7 Driver core patches for 3.12-rc1
Here's the big driver core pull request for 3.12-rc1.
 
 Lots of tiny changes here fixing up the way sysfs attributes are
 created, to try to make drivers simpler, and fix a whole class race
 conditions with creations of device attributes after the device was
 announced to userspace.
 
 All the various pieces are acked by the different subsystem maintainers.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-3.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core patches from Greg KH:
 "Here's the big driver core pull request for 3.12-rc1.

  Lots of tiny changes here fixing up the way sysfs attributes are
  created, to try to make drivers simpler, and fix a whole class race
  conditions with creations of device attributes after the device was
  announced to userspace.

  All the various pieces are acked by the different subsystem
  maintainers"

* tag 'driver-core-3.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (119 commits)
  firmware loader: fix pending_fw_head list corruption
  drivers/base/memory.c: introduce help macro to_memory_block
  dynamic debug: line queries failing due to uninitialized local variable
  sysfs: sysfs_create_groups returns a value.
  debugfs: provide debugfs_create_x64() when disabled
  rbd: convert bus code to use bus_groups
  firmware: dcdbas: use binary attribute groups
  sysfs: add sysfs_create/remove_groups for when SYSFS is not enabled
  driver core: add #include <linux/sysfs.h> to core files.
  HID: convert bus code to use dev_groups
  Input: serio: convert bus code to use drv_groups
  Input: gameport: convert bus code to use drv_groups
  driver core: firmware: use __ATTR_RW()
  driver core: core: use DEVICE_ATTR_RO
  driver core: bus: use DRIVER_ATTR_WO()
  driver core: create write-only attribute macros for devices and drivers
  sysfs: create __ATTR_WO()
  driver-core: platform: convert bus code to use dev_groups
  workqueue: convert bus code to use dev_groups
  MEI: convert bus code to use dev_groups
  ...
2013-09-03 11:37:15 -07:00
Linus Torvalds
b3b49114c8 USB patches for 3.12-rc1
Here's the big USB driver pull request for 3.12-rc1
 
 Lots of USB driver fixes and updates.  Nothing major, just the normal
 xhci, gadget, and other driver changes.  Full details in the shortlog.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-3.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB patches from Greg KH:
 "Here's the big USB driver pull request for 3.12-rc1

  Lots of USB driver fixes and updates.  Nothing major, just the normal
  xhci, gadget, and other driver changes.  Full details in the shortlog"

* tag 'usb-3.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (352 commits)
  usbcore: fix incorrect type in assignment in descriptors_changed()
  usbcore: compare and release one bos descriptor in usb_reset_and_verify_device()
  ehci: remove debugging statement with ehci statistics in ehci_stop()
  ehci: remove duplicate debug_async_open() prototype in ehci-dbg.c
  ehci: enable debugging code when CONFIG_DYNAMIC_DEBUG is set
  ehci: remove ehci_vdbg() verbose debugging statements
  Documentation sysfs-bus-usb: Document which files are used by libusb
  Documentation sysfs-bus-usb: Document the speed file used by libusb
  Documentation sysfs-bus-usb: Move files with known users to stable
  USB: fix build error when CONFIG_PM_SLEEP isn't enabled
  usb: r8a66597-hcd: use platform_{get,set}_drvdata()
  usb: phy-tegra-usb: use platform_{get,set}_drvdata()
  usb: acm gadget: Null termintate strings table
  dma: cppi41: off by one in desc_to_chan()
  xhci: Fix warning introduced by disabling runtime PM.
  dev-core: fix build break when DEBUG is enabled
  USB: OHCI: Allow runtime PM without system sleep
  usb: ohci-at91: remove unnecessary dev_set_drvdata()
  usb: renesas_usbhs: use platform_{get,set}_drvdata()
  usb: fotg210-udc: use platform_{get,set}_drvdata()
  ...
2013-09-03 11:35:32 -07:00
Chris Metcalf
309272f99f tile: clean up relocate_kernel_64 debug code
We remove some debug code in relocate_kernel_64.S that made raw
calls to the hv_console_putc Tilera hypervisor API, since everything
should funnel through the early_hv_write() API.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2013-09-03 14:13:31 -04:00
Linus Torvalds
1ccfd5eaf8 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull first batch of s390 updates from Martin Schwidefsky:
 "The most interesting change is that Martin converted s390 to generic
  hardirqs.  Which means that all current architectures have been
  converted and that CONFIG_GENERIC_HARDIRQS can be removed.  Martin
  prepared a patch for that already (see genirq branch), but the best
  time to merge that is probably at the end of the merge window / begin
  of -rc1.

  Another patch converts s390 to software referenced bits instead of
  relying on the reference bit in the storage key.  Therefore s390
  doesn't use storage keys anymore, except for kvm.

  Besides that we have improvements, cleanups and fixes in PCI, DASD and
  all over the place."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (32 commits)
  s390/pci: use virtual memory for iommu bitmap
  s390/cio: fix unlocked access of global bitmap
  s390/pci: update function handle after resume from hibernate
  s390/pci: try harder to modify a function
  s390/pci: split lpf
  s390/hibernate: add early resume function
  s390/pci: add recover sysfs knob
  s390/pci: use claim_resource
  s390/pci/hotplug: convert to be builtin only
  s390/mm: implement software referenced bits
  s390/dasd: fix statistics for recovered requests
  s390/tx: allow program interruption filtering in user space
  s390/pgtable: fix mprotect for single-threaded KVM guests
  s390/time: return with irqs disabled from psw_idle
  s390/kprobes: add support for compare and branch instructions
  s390/switch_to: fix save_access_regs() / restore_access_regs()
  s390/bitops: fix inline assembly constraints
  s390/dasd: enable raw_track_access reads without direct I/O
  s390/mm: introduce ptep_flush_lazy helper
  s390/time: clock comparator revalidation
  ...
2013-09-03 10:46:26 -07:00