diff options
| author |   Alistair Popple <alistair@popple.id.au> | 2014-03-06 14:52:28 +1100 |
|---|---|---|
| committer |   Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-05-01 08:26:30 +1000 |
| commit | e2c37d908336dc27c8b405f063c2a163124947fa (patch) | |
| tree | 2a5582122d13305abcd4558ed6810329369ea211 /arch/powerpc/sysdev/ppc4xx_pci.c | |
| parent | IBM Akebono: Add the Akebono platform (diff) | |
| download | linux-dev-e2c37d908336dc27c8b405f063c2a163124947fa.tar.xz linux-dev-e2c37d908336dc27c8b405f063c2a163124947fa.zip | |
powerpc: Added PCI MSI support using the HSTA module
The PPC476GTR SoC supports message signalled interrupts (MSI) by writing
to special addresses within the High Speed Transfer Assist (HSTA) module.
This patch adds support for PCI MSI with a new system device. The DMA
window is also updated to allow access to the entire 42-bit address range
to allow PCI devices write access to the HSTA module.
Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/sysdev/ppc4xx_pci.c')
| -rw-r--r-- | arch/powerpc/sysdev/ppc4xx_pci.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/powerpc/sysdev/ppc4xx_pci.c b/arch/powerpc/sysdev/ppc4xx_pci.c index 5a4f61ee6b33..df6e2fc4ff92 100644 --- a/arch/powerpc/sysdev/ppc4xx_pci.c +++ b/arch/powerpc/sysdev/ppc4xx_pci.c @@ -176,8 +176,12 @@ static int __init ppc4xx_parse_dma_ranges(struct pci_controller *hose, return -ENXIO; } - /* Check that we are fully contained within 32 bits space */ - if (res->end > 0xffffffff) { + /* Check that we are fully contained within 32 bits space if we are not + * running on a 460sx or 476fpe which have 64 bit bus addresses. + */ + if (res->end > 0xffffffff && + !(of_device_is_compatible(hose->dn, "ibm,plb-pciex-460sx") + || of_device_is_compatible(hose->dn, "ibm,plb-pciex-476fpe"))) { printk(KERN_ERR "%s: dma-ranges outside of 32 bits space\n", hose->dn->full_name); return -ENXIO; |