On Fri, Apr 10, 2015 at 04:31:00PM +1000, Alexey Kardashevskiy wrote: > This moves iommu_table creation to the beginning. This is a mechanical > patch. > > Signed-off-by: Alexey Kardashevskiy <a...@ozlabs.ru> > --- > arch/powerpc/platforms/powernv/pci-ioda.c | 34 > ++++++++++++++++--------------- > 1 file changed, 18 insertions(+), 16 deletions(-) > > diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c > b/arch/powerpc/platforms/powernv/pci-ioda.c > index 4d80502..a1e0df9 100644 > --- a/arch/powerpc/platforms/powernv/pci-ioda.c > +++ b/arch/powerpc/platforms/powernv/pci-ioda.c > @@ -1437,27 +1437,33 @@ static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb > *phb, > addr = page_address(tce_mem); > memset(addr, 0, tce_table_size); > > + /* Setup iommu */ > + pe->table_group.tables[0].it_group = &pe->table_group; > + > + /* Setup linux iommu table */ > + tbl = &pe->table_group.tables[0]; > + pnv_pci_setup_iommu_table(tbl, addr, tce_table_size, 0, > + IOMMU_PAGE_SHIFT_4K); > + > + tbl->it_ops = &pnv_ioda2_iommu_ops; > + iommu_init_table(tbl, phb->hose->node); > +#ifdef CONFIG_IOMMU_API > + pe->table_group.ops = &pnv_pci_ioda2_ops; > +#endif > + > /* > * Map TCE table through TVT. The TVE index is the PE number > * shifted by 1 bit for 32-bits DMA space. > */ > rc = opal_pci_map_pe_dma_window(phb->opal_id, pe->pe_number, > - pe->pe_number << 1, 1, __pa(addr), > - tce_table_size, 0x1000); > + pe->pe_number << 1, 1, __pa(tbl->it_base), > + tbl->it_size << 3, 1ULL << tbl->it_page_shift);
This looks like a real change, not just mechanical code movement.
> if (rc) {
> pe_err(pe, "Failed to configure 32-bit TCE table,"
> " err %ld\n", rc);
> goto fail;
> }
>
> - /* Setup iommu */
> - pe->table_group.tables[0].it_group = &pe->table_group;
> -
> - /* Setup linux iommu table */
> - tbl = &pe->table_group.tables[0];
> - pnv_pci_setup_iommu_table(tbl, addr, tce_table_size, 0,
> - IOMMU_PAGE_SHIFT_4K);
> -
> /* OPAL variant of PHB3 invalidated TCEs */
> swinvp = of_get_property(phb->hose->dn, "ibm,opal-tce-kill", NULL);
> if (swinvp) {
> @@ -1471,16 +1477,12 @@ static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb
> *phb,
> 8);
> tbl->it_type |= (TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE);
> }
> - tbl->it_ops = &pnv_ioda2_iommu_ops;
> - iommu_init_table(tbl, phb->hose->node);
> -#ifdef CONFIG_IOMMU_API
> - pe->table_group.ops = &pnv_pci_ioda2_ops;
> -#endif
> iommu_register_group(&pe->table_group, phb->hose->global_number,
> pe->pe_number);
>
> if (pe->pdev)
> - set_iommu_table_base_and_group(&pe->pdev->dev, tbl);
> + set_iommu_table_base_and_group(&pe->pdev->dev,
> + &pe->table_group.tables[0]);
And it's not obvious why this change happens either.
> else
> pnv_ioda_setup_bus_dma(pe, pe->pbus, true);
>
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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