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author | Oliver O'Halloran <oohall@gmail.com> | 2020-11-03 15:35:07 +1100 |
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committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-02-09 00:01:05 +1100 |
commit | fbbefb320214db14c3e740fce98e2c95c9d0669b (patch) | |
tree | 37aaba6730d849c822c918a45f1a60ac2c6c738f /arch/powerpc/platforms/powermac/pci.c | |
parent | powerpc/pci: Add ppc_md.discover_phbs() (diff) | |
download | linux-dev-fbbefb320214db14c3e740fce98e2c95c9d0669b.tar.xz linux-dev-fbbefb320214db14c3e740fce98e2c95c9d0669b.zip |
powerpc/pci: Move PHB discovery for PCI_DN using platforms
Make powernv, pseries, powermac and maple use ppc_mc.discover_phbs.
These platforms need to be done together because they all depend on
pci_dn's being created from the DT. The pci_dn contains a pointer to
the relevant pci_controller so they need to be created after the
pci_controller structures are available, but before PCI devices are
scanned. Currently this ordering is provided by initcalls and the
sequence is:
1. PHBs are discovered (setup_arch) (early boot, pre-initcalls)
2. pci_dn are created from the unflattended DT (core initcall)
3. PHBs are scanned pcibios_init() (subsys initcall)
The new ppc_md.discover_phbs() function is also a core_initcall so we
can't guarantee ordering between the creation of pci_controllers and
the creation of pci_dn's which require a pci_controller. We could use
the postcore, or core_sync initcall levels, but it's cleaner to just
move the pci_dn setup into the per-PHB inits which occur inside of
.discover_phb() for these platforms. This brings the boot-time path in
line with the PHB hotplug path that is used for pseries DLPAR
operations too.
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
[mpe: Squash powermac & maple in to avoid breakage those platforms,
convert memblock allocs to use kmalloc to avoid warnings]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201103043523.916109-2-oohall@gmail.com
Diffstat (limited to 'arch/powerpc/platforms/powermac/pci.c')
-rw-r--r-- | arch/powerpc/platforms/powermac/pci.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/powermac/pci.c b/arch/powerpc/platforms/powermac/pci.c index e35eaa9cf938..e9abe0f2e7f0 100644 --- a/arch/powerpc/platforms/powermac/pci.c +++ b/arch/powerpc/platforms/powermac/pci.c @@ -850,6 +850,10 @@ static int __init pmac_add_bridge(struct device_node *dev) /* Fixup "bus-range" OF property */ fixup_bus_range(dev); + /* create pci_dn's for DT nodes under this PHB */ + if (IS_ENABLED(CONFIG_PPC64)) + pci_devs_phb_init_dynamic(hose); + return 0; } |