diff options
| author | Oliver O'Halloran <oohall@gmail.com> | 2020-04-17 17:35:07 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-05-28 23:24:39 +1000 |
| commit | 718d249aeadff058f79c2e6b25212dd45bd711ae (patch) | |
| tree | c7d37f6ad45b91d9ceff1894bbb65dd77cb9d876 /arch | |
| parent | dc3d8f85bb571c3640ebba24b82a527cf2cb3f24 (diff) | |
| download | linux-718d249aeadff058f79c2e6b25212dd45bd711ae.tar.bz2 | |
powerpc/powernv/pci: Reserve the root bus PE during init
Doing it once during boot rather than doing it on the fly and drop the janky
populated logic.
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200417073508.30356-4-oohall@gmail.com
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/platforms/powernv/pci-ioda.c | 26 | ||||
| -rw-r--r-- | arch/powerpc/platforms/powernv/pci.h | 1 |
2 files changed, 9 insertions, 18 deletions
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index d9a870355e79..c4f981cd3cb0 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -1145,8 +1145,7 @@ static struct pnv_ioda_pe *pnv_ioda_setup_bus_PE(struct pci_bus *bus, bool all) } /* PE number for root bus should have been reserved */ - if (pci_is_root_bus(bus) && - phb->ioda.root_pe_idx != IODA_INVALID_PE) + if (pci_is_root_bus(bus)) pe = &phb->ioda.pe_array[phb->ioda.root_pe_idx]; /* Check if PE is determined by M64 */ @@ -3199,15 +3198,6 @@ static void pnv_pci_configure_bus(struct pci_bus *bus) dev_info(&bus->dev, "Configuring PE for bus\n"); - /* The PE for root bus should be realized before any one else */ - if (!phb->ioda.root_pe_populated) { - pe = pnv_ioda_setup_bus_PE(phb->hose->bus, false); - if (pe) { - phb->ioda.root_pe_idx = pe->pe_number; - phb->ioda.root_pe_populated = true; - } - } - /* Don't assign PE to PCI bus, which doesn't have subordinate devices */ if (list_empty(&bus->devices)) return; @@ -3490,11 +3480,10 @@ static void pnv_ioda_release_pe(struct pnv_ioda_pe *pe) * that it can be populated again in PCI hot add path. The PE * shouldn't be destroyed as it's the global reserved resource. */ - if (phb->ioda.root_pe_populated && - phb->ioda.root_pe_idx == pe->pe_number) - phb->ioda.root_pe_populated = false; - else - pnv_ioda_free_pe(pe); + if (phb->ioda.root_pe_idx == pe->pe_number) + return; + + pnv_ioda_free_pe(pe); } static void pnv_pci_release_device(struct pci_dev *pdev) @@ -3602,6 +3591,7 @@ static void __init pnv_pci_init_ioda_phb(struct device_node *np, struct pnv_phb *phb; unsigned long size, m64map_off, m32map_off, pemap_off; unsigned long iomap_off = 0, dma32map_off = 0; + struct pnv_ioda_pe *root_pe; struct resource r; const __be64 *prop64; const __be32 *prop32; @@ -3769,7 +3759,9 @@ static void __init pnv_pci_init_ioda_phb(struct device_node *np, phb->ioda.root_pe_idx = phb->ioda.reserved_pe_idx - 1; pnv_ioda_reserve_pe(phb, phb->ioda.root_pe_idx); } else { - phb->ioda.root_pe_idx = IODA_INVALID_PE; + /* otherwise just allocate one */ + root_pe = pnv_ioda_alloc_pe(phb); + phb->ioda.root_pe_idx = root_pe->pe_number; } INIT_LIST_HEAD(&phb->ioda.pe_list); diff --git a/arch/powerpc/platforms/powernv/pci.h b/arch/powerpc/platforms/powernv/pci.h index 83d40a06e938..51c254f2f3cb 100644 --- a/arch/powerpc/platforms/powernv/pci.h +++ b/arch/powerpc/platforms/powernv/pci.h @@ -136,7 +136,6 @@ struct pnv_phb { unsigned int total_pe_num; unsigned int reserved_pe_idx; unsigned int root_pe_idx; - bool root_pe_populated; /* 32-bit MMIO window */ unsigned int m32_size; |