linux.git/arch/powerpc/sysdev/mpic.c, branch v3.10

powerpc/mpic: Fix irq distribution problem when MPIC_SINGLE_DEST_CPU

2013-05-31T22:29:24+00:00

For the mpic with a flag MPIC_SINGLE_DEST_CPU, only one bit should be
set in interrupt destination registers.

The code is applicable to 64-bit platforms as well as 32-bit.

Signed-off-by: Zhao Chenhui 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Fix irq_set_affinity() return values

2013-05-14T06:00:18+00:00

Signed-off-by: Alexander Gordeev 
Signed-off-by: Benjamin Herrenschmidt

irqdomain: Allow quiet failure mode

2013-05-06T01:37:43+00:00

Some interrupt controllers refuse to map interrupts marked as
"protected" by firwmare. Since we try to map everyting in the
device-tree on some platforms, we end up with a lot of nasty
WARN's in the boot log for what is a normal situation on those
machines.

This defines a specific return code (-EPERM) from the host map()
callback which cause irqdomain to fail silently.

MPIC is updated to return this when hitting a protected source
printing only a single line message for diagnostic purposes.

Signed-off-by: Benjamin Herrenschmidt

powerpc/mpic: allow coreint to be determined by MPIC version

2013-02-15T20:13:22+00:00

This will be used by the qemu-e500 platform, as the MPIC version (and
thus whether we have coreint) depends on how QEMU is configured.

Signed-off-by: Scott Wood 
Signed-off-by: Kumar Gala

powerpc/mpic: Make distribute_irqs obey MPIC_SINGLE_DEST_CPU

2013-01-29T00:35:04+00:00

Previously we were setting an illegal configuration on mpc85xx
MPICs if CONFIG_IRQ_ALL_CPUS is enabled (which for some reason it is
in mpc85xx_smp_defconfig).

Signed-off-by: Scott Wood 
Signed-off-by: Benjamin Herrenschmidt

POWERPC: drivers: remove __dev* attributes.

2013-01-03T23:57:04+00:00

CONFIG_HOTPLUG is going away as an option.  As a result, the __dev*
markings need to be removed.

This change removes the use of __devinit, __devexit_p, __devinitdata,
__devinitconst, and __devexit from these drivers.

Based on patches originally written by Bill Pemberton, but redone by me
in order to handle some of the coding style issues better, by hand.

Cc: Bill Pemberton 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Signed-off-by: Greg Kroah-Hartman

powerpc/mpic: FSL MPIC error interrupt support.

2012-09-12T19:57:10+00:00

All SOC device error interrupts are muxed and delivered to the core
as a single MPIC error interrupt. Currently all the device drivers
requiring access to device errors have to register for the MPIC error
interrupt as a shared interrupt.

With this patch we add interrupt demuxing capability in the mpic driver,
allowing device drivers to register for their individual error interrupts.
This is achieved by handling error interrupts in a cascaded fashion.

MPIC error interrupt is handled by the "error_int_handler", which
subsequently demuxes it using the EISR and delivers it to the respective
drivers.

The error interrupt capability is dependent on the MPIC EIMR register,
which was introduced in FSL MPIC version 4.1 (P4080 rev2). So, error
interrupt demuxing capability is dependent on the MPIC version and can
be used for versions >= 4.1.

Signed-off-by: Varun Sethi 
Signed-off-by: Bogdan Hamciuc 
Signed-off-by: Kumar Gala

powerpc/mpic: finish supporting timer group B on Freescale chips

2012-09-12T19:57:07+00:00

Previously, these interrupts would be mapped, but the offset calculation
was broken, and only the first group was initialized.

Signed-off-by: Varun Sethi 
Signed-off-by: Scott Wood 
Signed-off-by: Kumar Gala

powerpc/mpic: Create a revmap with enough entries for IPIs and timers

2012-07-23T04:20:42+00:00

The current mpic code creates a linear revmap just big enough for all
the sources, which happens to miss the IPIs and timers on some machines.

This will in turn break when the irqdomain code loses the fallback of
doing a linear search when the revmap fails (and really slows down IPIs
otherwise).

This happens for example on the U4 based Apple machines such as the
dual core PowerMac G5s.

Signed-off-by: Benjamin Herrenschmidt

powerpc/mpic: Use the MPIC_LARGE_VECTORS flag for FSL MPIC.

2012-07-10T12:07:22+00:00

We should use the MPIC_LARG_VECTORS flag while intializing the MPIC.
This prevents us from eating in to hardware vector number space (MSIs)
while setting up internal sources.

Signed-off-by: Varun Sethi 
Signed-off-by: Kumar Gala