| Message ID | 20230120-uml-pci-of-v1-1-134fb66643d8@axis.com (mailing list archive) |
|---|---|
| State | Handled Elsewhere |
| Headers | show |
| Series | um: virt-pci: implement pcibios_get_phb_of_node() | expand |
On Fri, 2023-01-20 at 09:02 +0100, Vincent Whitchurch wrote: > Implement pcibios_get_phb_of_node() as x86 does in order to allow PCI > busses to be associated with devicetree nodes. > > Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com> > --- > arch/um/drivers/virt-pci.c | 19 +++++++++++++++++++ > 1 file changed, 19 insertions(+) > > diff --git a/arch/um/drivers/virt-pci.c b/arch/um/drivers/virt-pci.c > index 3ac220dafec4..6884e1be38e4 100644 > --- a/arch/um/drivers/virt-pci.c > +++ b/arch/um/drivers/virt-pci.c > @@ -533,6 +533,25 @@ static void um_pci_irq_vq_cb(struct virtqueue *vq) > } > } > > +/* Copied from arch/x86/kernel/devicetree.c */ > +struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus) Hah. I was going to ask how that works without any ifdef or anything, but then I found the __weak version :-) Acked-by: Johannes Berg <johannes@sipsolutions.net> Or maybe I should finally put on my tentative ARCH=um maintainer hat and start taking patches :) johannes
diff --git a/arch/um/drivers/virt-pci.c b/arch/um/drivers/virt-pci.c index 3ac220dafec4..6884e1be38e4 100644 --- a/arch/um/drivers/virt-pci.c +++ b/arch/um/drivers/virt-pci.c @@ -533,6 +533,25 @@ static void um_pci_irq_vq_cb(struct virtqueue *vq) } } +/* Copied from arch/x86/kernel/devicetree.c */ +struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus) +{ + struct device_node *np; + + for_each_node_by_type(np, "pci") { + const void *prop; + unsigned int bus_min; + + prop = of_get_property(np, "bus-range", NULL); + if (!prop) + continue; + bus_min = be32_to_cpup(prop); + if (bus->number == bus_min) + return np; + } + return NULL; +} + static int um_pci_init_vqs(struct um_pci_device *dev) { struct virtqueue *vqs[2];
Implement pcibios_get_phb_of_node() as x86 does in order to allow PCI busses to be associated with devicetree nodes. Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com> --- arch/um/drivers/virt-pci.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) --- base-commit: 1b929c02afd37871d5afb9d498426f83432e71c2 change-id: 20230120-uml-pci-of-f21d5ba4b245 Best regards,