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powerpc/powernv/pci: Fallback to OPAL for TCE invalidations

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If we don't find registers for the PHB or don't know the model
specific invalidation method, use OPAL calls instead.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Benjamin Herrenschmidt 2016-07-08 16:37:15 +10:00 committed by Michael Ellerman
parent fd141d1a99
commit f0228c4130
1 changed files with 29 additions and 4 deletions
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33
arch/powerpc/platforms/powernv/pci-ioda.c
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@ -1861,6 +1861,17 @@ static void pnv_pci_phb3_tce_invalidate(struct pnv_ioda_pe *pe, bool rm,
}
}
static inline void pnv_pci_ioda2_tce_invalidate_pe(struct pnv_ioda_pe *pe)
{
struct pnv_phb *phb = pe->phb;
if (phb->model == PNV_PHB_MODEL_PHB3 && phb->regs)
pnv_pci_phb3_tce_invalidate_pe(pe);
else
opal_pci_tce_kill(phb->opal_id, OPAL_PCI_TCE_KILL_PE,
pe->pe_number, 0, 0, 0);
}
static void pnv_pci_ioda2_tce_invalidate(struct iommu_table *tbl,
unsigned long index, unsigned long npages, bool rm)
{
@ -1869,17 +1880,31 @@ static void pnv_pci_ioda2_tce_invalidate(struct iommu_table *tbl,
list_for_each_entry_rcu(tgl, &tbl->it_group_list, next) {
struct pnv_ioda_pe *pe = container_of(tgl->table_group,
struct pnv_ioda_pe, table_group);
if (pe->phb->type == PNV_PHB_NPU) {
struct pnv_phb *phb = pe->phb;
unsigned int shift = tbl->it_page_shift;
if (phb->type == PNV_PHB_NPU) {
/*
* The NVLink hardware does not support TCE kill
* per TCE entry so we have to invalidate
* the entire cache for it.
*/
pnv_pci_phb3_tce_invalidate_entire(pe->phb, rm);
pnv_pci_phb3_tce_invalidate_entire(phb, rm);
continue;
}
pnv_pci_phb3_tce_invalidate(pe, rm, tbl->it_page_shift,
index, npages);
if (phb->model == PNV_PHB_MODEL_PHB3 && phb->regs)
pnv_pci_phb3_tce_invalidate(pe, rm, shift,
index, npages);
else if (rm)
opal_rm_pci_tce_kill(phb->opal_id,
OPAL_PCI_TCE_KILL_PAGES,
pe->pe_number, 1u << shift,
index << shift, npages);
else
opal_pci_tce_kill(phb->opal_id,
OPAL_PCI_TCE_KILL_PAGES,
pe->pe_number, 1u << shift,
index << shift, npages);
}
}