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authorAlexey Kardashevskiy <aik@ozlabs.ru>2015-06-18 11:41:36 +1000
committerMichael Ellerman <mpe@ellerman.id.au>2015-06-19 17:10:29 +1000
commit5c89a87d13d168eacb8110810544a98ce0f4319d (patch)
tree97db57398da3773c5998aebd0605e31c0cc5cca5 /arch/powerpc
parente148315852855f8f06b8bb4601c8cade34af8df3 (diff)
powerpc/powernv: Fix wrong IOMMU table in pnv_ioda_setup_bus_dma()
When pnv_pci_ioda_fixup() is called during PHB fixup time, each PE in the sorted list of PEs (phb::pe_dma_list) is iterated to setup the PE's DMA32 space by pnv_ioda_setup_bus_dma() if the PE's DMA32 weight is bigger than zero. The function also assigns all the subordinate PCI devices of the PE's primary bus with the PE's DMA32 IOMMU table. It causes the PCI devicess in the child PEs, which don't have DMA weight, receives wrong IOMMU table and then IOMMU group. The patch fixes above issue by more check on the PE's coverage and don't assign IOMMU table to those PCI devices, which belong to the child PEs. The problem was found on Firestone platform initially. Suggested-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/platforms/powernv/pci-ioda.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index 8424f5cdf0b1..5738d315248b 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -1661,7 +1661,7 @@ static void pnv_ioda_setup_bus_dma(struct pnv_ioda_pe *pe,
set_iommu_table_base(&dev->dev, pe->table_group.tables[0]);
iommu_add_device(&dev->dev);
- if (dev->subordinate)
+ if ((pe->flags & PNV_IODA_PE_BUS_ALL) && dev->subordinate)
pnv_ioda_setup_bus_dma(pe, dev->subordinate);
}
}