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| author |   Oliver O'Halloran <oohall@gmail.com> | 2020-04-17 17:35:05 +1000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2020-05-28 23:24:38 +1000 |
| commit | a8d7d5fc2e1672924a391aa37ef8c02d1ec84a4e (patch) | |
| tree | a25a4773ee37656e4eef8c66d1b0ceec607c81d7 /arch/powerpc/platforms/powernv/pci-ioda.c | |
| parent | powerpc/powernv/pci: Add an explaination for PNV_IODA_PE_BUS_ALL (diff) | |
| download | linux-dev-a8d7d5fc2e1672924a391aa37ef8c02d1ec84a4e.tar.xz linux-dev-a8d7d5fc2e1672924a391aa37ef8c02d1ec84a4e.zip | |
powerpc/powernv/pci: Add helper to find ioda_pe from BDFN
For each PHB we maintain a reverse-map that can be used to find the
PE that a BDFN is currently mapped to. Add a helper for doing this
lookup so we can check if a PE has been configured without looking
at pdn->pe_number.
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200417073508.30356-2-oohall@gmail.com
Diffstat (limited to 'arch/powerpc/platforms/powernv/pci-ioda.c')
| -rw-r--r-- | arch/powerpc/platforms/powernv/pci-ioda.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index 9902f2bea0ec..88d9bdc46373 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -660,6 +660,16 @@ static int pnv_ioda_get_pe_state(struct pnv_phb *phb, int pe_no) return state; } +struct pnv_ioda_pe *pnv_pci_bdfn_to_pe(struct pnv_phb *phb, u16 bdfn) +{ + int pe_number = phb->ioda.pe_rmap[bdfn]; + + if (pe_number == IODA_INVALID_PE) + return NULL; + + return &phb->ioda.pe_array[pe_number]; +} + struct pnv_ioda_pe *pnv_ioda_get_pe(struct pci_dev *dev) { struct pci_controller *hose = pci_bus_to_host(dev->bus); |