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powerpc/powernv/ioda2: Introduce pnv_pci_ioda2_set_window

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This is a part of moving DMA window programming to an iommu_ops
callback. pnv_pci_ioda2_set_window() takes an iommu_table_group as
a first parameter (not pnv_ioda_pe) as it is going to be used as
a callback for VFIO DDW code.

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>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Alexey Kardashevskiy 2015-06-05 16:35:18 +10:00 committed by Michael Ellerman
parent aca6913f55
commit 43cb60ab7f
1 changed files with 38 additions and 9 deletions
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47
arch/powerpc/platforms/powernv/pci-ioda.c
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@ -1970,6 +1970,43 @@ static void pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb,
}
}
static long pnv_pci_ioda2_set_window(struct iommu_table_group *table_group,
int num, struct iommu_table *tbl)
{
struct pnv_ioda_pe *pe = container_of(table_group, struct pnv_ioda_pe,
table_group);
struct pnv_phb *phb = pe->phb;
int64_t rc;
const __u64 start_addr = tbl->it_offset << tbl->it_page_shift;
const __u64 win_size = tbl->it_size << tbl->it_page_shift;
pe_info(pe, "Setting up window %llx..%llx pg=%x\n",
start_addr, start_addr + win_size - 1,
IOMMU_PAGE_SIZE(tbl));
/*
* 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(tbl->it_base),
tbl->it_size << 3,
IOMMU_PAGE_SIZE(tbl));
if (rc) {
pe_err(pe, "Failed to configure TCE table, err %ld\n", rc);
return rc;
}
pnv_pci_link_table_and_group(phb->hose->node, num,
tbl, &pe->table_group);
pnv_pci_ioda2_tce_invalidate_entire(pe);
return 0;
}
static void pnv_pci_ioda2_set_bypass(struct pnv_ioda_pe *pe, bool enable)
{
uint16_t window_id = (pe->pe_number << 1 ) + 1;
@ -2125,21 +2162,13 @@ static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb,
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(tbl->it_base),
tbl->it_size << 3, 1ULL << tbl->it_page_shift);
rc = pnv_pci_ioda2_set_window(&pe->table_group, 0, tbl);
if (rc) {
pe_err(pe, "Failed to configure 32-bit TCE table,"
" err %ld\n", rc);
goto fail;
}
pnv_pci_ioda2_tce_invalidate_entire(pe);
/* OPAL variant of PHB3 invalidated TCEs */
if (phb->ioda.tce_inval_reg)
tbl->it_type |= (TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE);