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powerpc/powernv: Fix invalid IOMMU table

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Ben found the root cause. Commit 37f02195be
("powerpc/pci: fix PCI-e devices rescan issue on powerpc platform")
overwrites the IOMMU table of PCI device while enabling PCI device.
The patch intends to fix the IOMMU table after that point.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Gavin Shan 2013-04-25 19:21:02 +00:00 committed by Benjamin Herrenschmidt
parent 373f565741
commit 959c9bdd58
1 changed files with 12 additions and 21 deletions
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33
arch/powerpc/platforms/powernv/pci-ioda.c
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@ -434,20 +434,21 @@ static void pnv_pci_ioda_setup_PEs(void)
}
}
static void pnv_pci_ioda_dma_dev_setup(struct pnv_phb *phb, struct pci_dev *dev)
static void pnv_pci_ioda_dma_dev_setup(struct pnv_phb *phb, struct pci_dev *pdev)
{
/* We delay DMA setup after we have assigned all PE# */
}
struct pci_dn *pdn = pnv_ioda_get_pdn(pdev);
struct pnv_ioda_pe *pe;
static void pnv_ioda_setup_bus_dma(struct pnv_ioda_pe *pe, struct pci_bus *bus)
{
struct pci_dev *dev;
/*
* The function can be called while the PE#
* hasn't been assigned. Do nothing for the
* case.
*/
if (!pdn || pdn->pe_number == IODA_INVALID_PE)
return;
list_for_each_entry(dev, &bus->devices, bus_list) {
set_iommu_table_base(&dev->dev, &pe->tce32_table);
if (dev->subordinate)
pnv_ioda_setup_bus_dma(pe, dev->subordinate);
}
pe = &phb->ioda.pe_array[pdn->pe_number];
set_iommu_table_base(&pdev->dev, &pe->tce32_table);
}
static void pnv_pci_ioda1_tce_invalidate(struct iommu_table *tbl,
@ -605,11 +606,6 @@ static void pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb,
}
iommu_init_table(tbl, phb->hose->node);
if (pe->pdev)
set_iommu_table_base(&pe->pdev->dev, tbl);
else
pnv_ioda_setup_bus_dma(pe, pe->pbus);
return;
fail:
/* XXX Failure: Try to fallback to 64-bit only ? */
@ -681,11 +677,6 @@ static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb,
}
iommu_init_table(tbl, phb->hose->node);
if (pe->pdev)
set_iommu_table_base(&pe->pdev->dev, tbl);
else
pnv_ioda_setup_bus_dma(pe, pe->pbus);
return;
fail:
if (pe->tce32_seg >= 0)