linux.git/arch/powerpc/sysdev/mpic.c, branch v2.6.23

[POWERPC] MPIC protected sources

2007-07-22T11:30:59+00:00

Some HW platforms, such as the new cell blades, requires some MPIC sources
to be left alone by the operating system. This implements support for
a "protected-sources" property in the mpic controller node containing a list
of source numbers to be protected against operating system interference.

For those interested in the gory details, the MPIC on the southbridge of
those blades has some of the processor outputs routed to the cell, and
at least one routed as a GPIO to the service processor. It will be used
in the GA product for routing some of the southbridge error interrupts
to the service processor which implements some of the RAS stuff, such
as checkstopping when fatal errors occurs before they can propagate.

Signed-off-by: Benjamin Herrenschmidt 
Acked-by: Arnd Bergmann 
Signed-off-by: Paul Mackerras

[POWERPC] Remove warning in mpic.c

2007-05-17T11:11:14+00:00

arch/powerpc/sysdev/mpic.c: In function 'mpic_request_ipis':
arch/powerpc/sysdev/mpic.c:1445: warning: ignoring return value of 'request_irq', declared with attribute warn_unused_result

Signed-off-by: Olof Johansson 
Signed-off-by: Paul Mackerras

[POWERPC] MPIC U3/U4 MSI backend

2007-05-08T03:46:48+00:00

MPIC U3/U4 MSI backend. Based on code from Segher, heavily hacked by me.
This only deals with MSI on U3/U4 MPICs, aka. CPC 9x5.

If we find a U3/U4 then we enable this backend, ie. take over the ppc_md
MSI hooks. We might need more elaborate logic in future to decide which
backend is enabled.

We need our own irq_chip so that we can do MSI masking/unmasking on
the device itself. We also need to mask explicitly on shutdown to make
sure we don't get bitten by lazy-disable semantics.

Signed-off-by: Michael Ellerman 
Signed-off-by: Paul Mackerras

[POWERPC] MPIC MSI allocator

2007-05-08T03:43:48+00:00

To support MSI on MPIC we need a way to reserve and allocate hardware irq
numbers, this patch implements an allocator for that purpose.

New firmware platforms must define a "msi-available-ranges" property on their
MPIC node for MSI to work. For U3/U4 we do a best-guess setup.

Signed-off-by: Michael Ellerman 
Signed-off-by: Paul Mackerras

[POWERPC] Enable MSI mappings for MPIC

2007-05-08T03:42:27+00:00

On some Apple machines the HT MSI mappings are not enabled by firmware, so
we need to do it by hand.

We can't use the pci routines as this code runs too early.

Signed-off-by: Michael Ellerman 
Signed-off-by: Paul Mackerras

[POWERPC] MPIC sys_device & suspend/resume

2007-05-07T10:31:13+00:00

This adds mpic to the system devices and implements suspend
and resume for them.  This is necessary to get interrupts for
modules back to where they were before a suspend to disk.

Signed-off-by: Johannes Berg 
Acked-by: Benjamin Herrenschmidt 
Signed-off-by: Paul Mackerras

[POWERPC] Fix spurious vectors on weird MPIC

2007-05-02T10:04:30+00:00

The weird TSI 10x MPIC needs an EOI after getting a spurious vector.  This
patch uses the existing MPIC_SPV_EOI flag to fix this issue.

Signed-off-by: Josh Boyer 
Signed-off-by: Paul Mackerras

[POWERPC] Rename MPIC_BROKEN_U3 to MPIC_U3_HT_IRQS

2007-04-24T12:06:58+00:00

Rename MPIC_BROKEN_U3 to something a little more descriptive. Its
effect is to enable support for HT irqs behind the PCI-X/HT bridge on
U3/U4 (aka. CPC9x5) parts.

Signed-off-by: Michael Ellerman 
Signed-off-by: Paul Mackerras

[POWERPC] Rename get_property to of_get_property: arch/powerpc

2007-04-12T17:55:19+00:00

Signed-off-by: Stephen Rothwell 
Acked-by: Benjamin Herrenschmidt 
Signed-off-by: Paul Mackerras

[POWERPC] mpic: set IPIs to be per-CPU

2007-02-16T03:00:19+00:00

This patch changes the MPIC IPIs to be per-CPU to avoid getting a
warning ("Cannot set affinity for irq 251") when taking a CPU
offline via sysfs or during suspend.

Signed-off-by: Johannes Berg 
Signed-off-by: Paul Mackerras