Commit a8d7d5fc authored by Oliver O'Halloran's avatar Oliver O'Halloran Committed by Michael Ellerman
Browse files

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: default avatarOliver O'Halloran <oohall@gmail.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200417073508.30356-2-oohall@gmail.com
parent 9d0879a2

arch/powerpc/platforms/powernv/pci-ioda.c

+10 −0
Original line number Diff line number Diff line
@@ -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);

arch/powerpc/platforms/powernv/pci.h

+1 −0
Original line number Diff line number Diff line
@@ -208,6 +208,7 @@ extern int pnv_eeh_phb_reset(struct pci_controller *hose, int option); 


extern int pnv_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type);

extern void pnv_teardown_msi_irqs(struct pci_dev *pdev);

extern struct pnv_ioda_pe *pnv_pci_bdfn_to_pe(struct pnv_phb *phb, u16 bdfn);

extern struct pnv_ioda_pe *pnv_ioda_get_pe(struct pci_dev *dev);

extern void pnv_set_msi_irq_chip(struct pnv_phb *phb, unsigned int virq);

extern unsigned long pnv_pci_ioda2_get_table_size(__u32 page_shift,