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linux/arch/powerpc/sysdev
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Timur Tabi 895d603f94 powerpc/fsl_msi: add support for the fsl, msi property in PCI nodes 
On Freescale parts with multiple MSI controllers, the controllers are
combined into one "pool" of interrupts.  Whenever a device requests an MSI
interrupt, the next available interrupt from the pool is selected,
regardless of which MSI controller the interrupt is from.  This works
because each PCI bus has an ATMU to all of CCSR, so any PCI device can
access any MSI interrupt register.

The fsl,msi property is used to specify that a given PCI bus should only
use a specific MSI device.  This is necessary, for example, with the
Freescale hypervisor, because the MSI devices are assigned to specific
partitions.

Ideally, we'd like to be able to assign MSI devices to PCI busses within
the MSI or PCI layers.  However, there does not appear to be a mechanism
to do that.  Whenever the MSI layer wants to allocate an MSI interrupt to
a PCI device, it just calls arch_setup_msi_irqs().  It would be nice if we
could register an MSI device with a specific PCI bus.

So instead we remember the phandles of each MSI device, and we use that to
limit our search for an available interrupt.  Whenever we are asked to
allocate a new interrupt for a PCI device, we check the fsl,msi property
of the PCI bus for that device.  If it exists, then as we are looping over
all MSI devices, we skip the ones that don't have a matching phandle.

Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2011-11-24 02:01:41 -06:00
..
bestcomm powerpc: various straight conversions from module.h --> export.h 2011-10-31 19:30:44 -04:00
qe_lib powerpc/qe: Fixup QE_General4 errata 2011-11-24 01:28:42 -06:00
xics powerpc/irq: Remove IRQF_DISABLED 2011-11-08 14:51:46 +11:00
6xx-suspend.S
axonram.c block: remove support for bio remapping from ->make_request 2011-09-12 12:12:01 +02:00
cpm1.c treewide: Convert uses of struct resource to resource_size(ptr) 2011-06-10 14:55:36 +02:00
cpm2.c powerpc/fsl-cpm: Configure clock correctly for SCC 2010-04-19 23:13:03 -05:00
cpm2_pic.c powerpc/irq: Stop exporting irq_map 2011-05-04 15:02:15 +10:00
cpm2_pic.h powerpc/cpm2: Checkpatch cleanup 2010-03-04 10:43:58 -06:00
cpm_common.c Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux 2011-11-06 19:44:47 -08:00
dart.h
dart_iommu.c treewide: Convert uses of struct resource to resource_size(ptr) 2011-06-10 14:55:36 +02:00
dcr-low.S powerpc/4xx: Extended DCR support v2 2008-12-21 14:21:15 +11:00
dcr.c powerpc: add export.h to files making use of EXPORT_SYMBOL 2011-10-31 19:30:37 -04:00
ehv_pic.c arch/powerpc/sysdev/ehv_pic.c: add missing kfree 2011-11-24 02:01:24 -06:00
fsl_85xx_cache_ctlr.h powerpc/85xx: add cache-sram support 2010-10-14 00:54:38 -05:00
fsl_85xx_cache_sram.c powerpc: Remove ioremap_flags 2011-05-19 14:30:43 +10:00
fsl_85xx_l2ctlr.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2011-03-18 06:31:43 -07:00
fsl_gtm.c powerpc: add export.h to files making use of EXPORT_SYMBOL 2011-10-31 19:30:37 -04:00
fsl_lbc.c powerpc/85xx: Add lbc suspend support for PM 2011-11-24 02:01:40 -06:00
fsl_msi.c powerpc/fsl_msi: add support for the fsl, msi property in PCI nodes 2011-11-24 02:01:41 -06:00
fsl_msi.h powerpc/fsl_msi: add support for the fsl, msi property in PCI nodes 2011-11-24 02:01:41 -06:00
fsl_pci.c Merge branch 'next/cross-platform' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/linux-arm-soc 2011-07-26 17:12:10 -07:00
fsl_pci.h powerpc/fsl_pci: Add support for FSL PCIe controllers v2.x 2011-03-15 09:29:56 -05:00
fsl_pmc.c powerpc: add export.h to files making use of EXPORT_SYMBOL 2011-10-31 19:30:37 -04:00
fsl_rio.c fsl-rio: Add two ports and rapidio message units support 2011-11-24 02:01:34 -06:00
fsl_rio.h fsl-rio: Add two ports and rapidio message units support 2011-11-24 02:01:34 -06:00
fsl_rmu.c fsl-rio: Add two ports and rapidio message units support 2011-11-24 02:01:34 -06:00
fsl_soc.c powerpc: various straight conversions from module.h --> export.h 2011-10-31 19:30:44 -04:00
fsl_soc.h Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/fbdev-3.x into fbdev-next 2011-08-29 09:14:30 +00:00
grackle.c powerpc: rename ppc_pci_*_flags to pci_*_flags 2011-07-12 09:28:04 -05:00
i8259.c powerpc: Remove i8259 irq_host_ops->unmap 2011-05-19 15:31:41 +10:00
indirect_pci.c Fix common misspellings 2011-03-31 11:26:23 -03:00
ipic.c treewide: Convert uses of struct resource to resource_size(ptr) 2011-06-10 14:55:36 +02:00
ipic.h
Kconfig powerpc/4xx: Adding PCIe MSI support 2011-05-26 15:00:37 +10:00
Makefile fsl-rio: Split rio driver into two parts, RapidIO endpoint and message unit 2011-11-24 02:01:34 -06:00
micropatch.c powerpc/cpm1: Mark micropatch code/data static and __init 2010-07-11 11:04:06 -05:00
mmio_nvram.c treewide: Convert uses of struct resource to resource_size(ptr) 2011-06-10 14:55:36 +02:00
mpc5xxx_clocks.c powerpc: add export.h to files making use of EXPORT_SYMBOL 2011-10-31 19:30:37 -04:00
mpc8xx_pic.c powerpc: remove non-required uses of include <linux/module.h> 2011-10-31 19:30:44 -04:00
mpc8xx_pic.h
mpic.c powerpc/irq: Remove IRQF_DISABLED 2011-11-08 14:51:46 +11:00
mpic.h powerpc: mpic irq_data conversion. 2011-03-10 11:03:56 +11:00
mpic_msi.c powerpc: Fix MSI support on U4 bridge PCIe slot 2009-12-18 14:55:43 +11:00
mpic_pasemi_msi.c powerpc: Convert to new irq_* function names 2011-03-29 14:48:12 +02:00
mpic_u3msi.c powerpc: Convert to new irq_* function names 2011-03-29 14:48:12 +02:00
msi_bitmap.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
mv64x60.h
mv64x60_dev.c powerpc/mv64x60: Suspected typo in assignment 2011-03-02 16:50:05 +11:00
mv64x60_pci.c powerpc: Fix up implicit stat.h users 2011-10-31 19:30:39 -04:00
mv64x60_pic.c powerpc/irq: Stop exporting irq_map 2011-05-04 15:02:15 +10:00
mv64x60_udbg.c treewide: Convert uses of struct resource to resource_size(ptr) 2011-06-10 14:55:36 +02:00
of_rtc.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
pmi.c powerpc: Fix up modules that should be including module.h 2011-10-31 19:30:38 -04:00
ppc4xx_cpm.c powerpc/4xx: Add suspend and idle support 2010-11-29 10:05:06 -05:00
ppc4xx_gpio.c of/gpio: add default of_xlate function if device has a node pointer 2010-07-05 16:14:30 -06:00
ppc4xx_msi.c powerpc: include export.h for files using EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:30:38 -04:00
ppc4xx_pci.c powerpc/4xx/pci: Add __init annotations for *init_port_hw() functions. 2011-09-20 09:19:56 +10:00
ppc4xx_pci.h powerpc/4xx: enable and fix pcie gen1/gen2 on the 460sx 2011-08-11 13:51:18 -04:00
ppc4xx_soc.c powerpc/irq: Remove IRQF_DISABLED 2011-11-08 14:51:46 +11:00
rtc_cmos_setup.c powerpc: Fix up modules that should be including module.h 2011-10-31 19:30:38 -04:00
scom.c powerpc: add export.h to files making use of EXPORT_SYMBOL 2011-10-31 19:30:37 -04:00
simple_gpio.c powerpc: remove non-required uses of include <linux/module.h> 2011-10-31 19:30:44 -04:00
simple_gpio.h powerpc: Implement GPIO driver for simple memory-mapped banks 2008-12-30 11:13:45 -06:00
tsi108_dev.c powerpc: various straight conversions from module.h --> export.h 2011-10-31 19:30:44 -04:00
tsi108_pci.c powerpc: Convert to new irq_* function names 2011-03-29 14:48:12 +02:00
uic.c locking, powerpc: Annotate uic->lock as raw 2011-09-13 11:12:10 +02:00
xilinx_intc.c powerpc/irq: Stop exporting irq_map 2011-05-04 15:02:15 +10:00
xilinx_pci.c powerpc/virtex: Add support for Xilinx PCI host bridge 2009-06-06 10:14:22 -06:00