From: Oliver O'Halloran Date: Fri, 17 Apr 2020 07:35:05 +0000 (+1000) Subject: powerpc/powernv/pci: Add helper to find ioda_pe from BDFN X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=a8d7d5fc2e1672924a391aa37ef8c02d1ec84a4e;p=linux.git 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 Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200417073508.30356-2-oohall@gmail.com --- diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index 9902f2bea0ec5..88d9bdc46373b 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); diff --git a/arch/powerpc/platforms/powernv/pci.h b/arch/powerpc/platforms/powernv/pci.h index fc05f9b5caed1..83d40a06e938a 100644 --- a/arch/powerpc/platforms/powernv/pci.h +++ b/arch/powerpc/platforms/powernv/pci.h @@ -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,