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SubjectRe: [PATCH kernel v10 24/34] powerpc/powernv/ioda2: Rework iommu_table creation
On Tue, May 12, 2015 at 01:39:13AM +1000, Alexey Kardashevskiy wrote:
>This moves iommu_table creation to the beginning to make following changes
>easier to review. This starts using table parameters from the iommu_table
>struct.
>
>This should cause no behavioural change.
>
>Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
>Reviewed-by: David Gibson <david@gibson.dropbear.id.au>

Reviewed-by: Gavin Shan <gwshan@linux.vnet.ibm.com>

Thanks,
Gavin

>---
>Changes:
>v9:
>* updated commit log and did minor cleanup
>---
> arch/powerpc/platforms/powernv/pci-ioda.c | 24 ++++++++++++------------
> 1 file changed, 12 insertions(+), 12 deletions(-)
>
>diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
>index e3c784d..9b80b74 100644
>--- a/arch/powerpc/platforms/powernv/pci-ioda.c
>+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
>@@ -2074,13 +2074,23 @@ static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb,
> addr = page_address(tce_mem);
> memset(addr, 0, tce_table_size);
>
>+ /* Setup linux iommu table */
>+ 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);
> if (rc) {
> pe_err(pe, "Failed to configure 32-bit TCE table,"
> " err %ld\n", rc);
>@@ -2089,20 +2099,10 @@ static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb,
>
> pnv_pci_ioda2_tvt_invalidate(pe);
>
>- /* Setup linux iommu table */
>- pnv_pci_setup_iommu_table(tbl, addr, tce_table_size, 0,
>- IOMMU_PAGE_SHIFT_4K);
>-
> /* OPAL variant of PHB3 invalidated TCEs */
> if (pe->tce_inval_reg)
> 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
>-
> if (pe->flags & PNV_IODA_PE_DEV) {
> /*
> * Setting table base here only for carrying iommu_group
>--
>2.4.0.rc3.8.gfb3e7d5
>



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