powerpc/powernv/ioda2: Use new helpers to do proper cleanup on PE release

The existing code programmed TVT#0 with some address and then
immediately released that memory.

This makes use of pnv_pci_ioda2_unset_window() and
pnv_pci_ioda2_set_bypass() which do correct resource release and
TVT update.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index ee3e643..510bb9c 100644 (file)
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -1288,34 +1288,21 @@ m64_failed:
        return -EBUSY;
 }
 
+static long pnv_pci_ioda2_unset_window(struct iommu_table_group *table_group,
+               int num);
+static void pnv_pci_ioda2_set_bypass(struct pnv_ioda_pe *pe, bool enable);
+
 static void pnv_pci_ioda2_release_dma_pe(struct pci_dev *dev, struct pnv_ioda_pe *pe)
 {
-       struct pci_bus        *bus;
-       struct pci_controller *hose;
-       struct pnv_phb        *phb;
        struct iommu_table    *tbl;
-       unsigned long         addr;
        int64_t               rc;
 
-       bus = dev->bus;
-       hose = pci_bus_to_host(bus);
-       phb = hose->private_data;
        tbl = pe->table_group.tables[0];
-       addr = tbl->it_base;
-
-       opal_pci_map_pe_dma_window(phb->opal_id, pe->pe_number,
-                                  pe->pe_number << 1, 1, __pa(addr),
-                                  0, 0x1000);
-
-       rc = opal_pci_map_pe_dma_window_real(pe->phb->opal_id,
-                                       pe->pe_number,
-                                       (pe->pe_number << 1) + 1,
-                                       pe->tce_bypass_base,
-                                       0);
+       rc = pnv_pci_ioda2_unset_window(&pe->table_group, 0);
        if (rc)
                pe_warn(pe, "OPAL error %ld release DMA window\n", rc);
 
-       pnv_pci_unlink_table_and_group(tbl, &pe->table_group);
+       pnv_pci_ioda2_set_bypass(pe, false);
        if (pe->table_group.group) {
                iommu_group_put(pe->table_group.group);
                BUG_ON(pe->table_group.group);