| Message ID | 20211004141151.132231-4-andr2000@gmail.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | PCI devices passthrough on Arm, part 2 | expand |
Hi Oleksandr, > On 4 Oct 2021, at 3:11 pm, Oleksandr Andrushchenko <andr2000@gmail.com> wrote: > > From: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> > > Get host bridge node given a PCI device attached to it. > > This helper will be re-used for adding PCI devices by the subsequent > patches. > > Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> > Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com> > Reviewed-by: Stefano Stabellini <sstabellini@kernel.org> Reviewed-by: Rahul Singh <rahul.singh@arm.com> Tested-by: Rahul Singh <rahul.singh@arm.com> Regards, Rahul > --- > Since v2: > - !! dropped Stefano's r-b because of the changes > - s/PRI_pci/%pp after rebase onto Arm series > --- > xen/arch/arm/pci/pci-host-common.c | 16 ++++++++++++++++ > xen/include/asm-arm/pci.h | 1 + > 2 files changed, 17 insertions(+) > > diff --git a/xen/arch/arm/pci/pci-host-common.c b/xen/arch/arm/pci/pci-host-common.c > index 593beeb48ce4..592c01aae5bb 100644 > --- a/xen/arch/arm/pci/pci-host-common.c > +++ b/xen/arch/arm/pci/pci-host-common.c > @@ -276,6 +276,22 @@ int pci_get_host_bridge_segment(const struct dt_device_node *node, > return -EINVAL; > } > > +/* > + * Get host bridge node given a device attached to it. > + */ > +struct dt_device_node *pci_find_host_bridge_node(struct device *dev) > +{ > + struct pci_host_bridge *bridge; > + struct pci_dev *pdev = dev_to_pci(dev); > + > + bridge = pci_find_host_bridge(pdev->seg, pdev->bus); > + if ( unlikely(!bridge) ) > + { > + printk(XENLOG_ERR "Unable to find PCI bridge for %pp\n", &pdev->sbdf); > + return NULL; > + } > + return bridge->dt_node; > +} > /* > * Local variables: > * mode: C > diff --git a/xen/include/asm-arm/pci.h b/xen/include/asm-arm/pci.h > index 603a1fc072d1..e6d4000e2ac8 100644 > --- a/xen/include/asm-arm/pci.h > +++ b/xen/include/asm-arm/pci.h > @@ -99,6 +99,7 @@ void __iomem *pci_ecam_map_bus(struct pci_host_bridge *bridge, > struct pci_host_bridge *pci_find_host_bridge(uint16_t segment, uint8_t bus); > int pci_get_host_bridge_segment(const struct dt_device_node *node, > uint16_t *segment); > +struct dt_device_node *pci_find_host_bridge_node(struct device *dev); > > static always_inline bool is_pci_passthrough_enabled(void) > { > -- > 2.25.1 > >
diff --git a/xen/arch/arm/pci/pci-host-common.c b/xen/arch/arm/pci/pci-host-common.c index 593beeb48ce4..592c01aae5bb 100644 --- a/xen/arch/arm/pci/pci-host-common.c +++ b/xen/arch/arm/pci/pci-host-common.c @@ -276,6 +276,22 @@ int pci_get_host_bridge_segment(const struct dt_device_node *node, return -EINVAL; } +/* + * Get host bridge node given a device attached to it. + */ +struct dt_device_node *pci_find_host_bridge_node(struct device *dev) +{ + struct pci_host_bridge *bridge; + struct pci_dev *pdev = dev_to_pci(dev); + + bridge = pci_find_host_bridge(pdev->seg, pdev->bus); + if ( unlikely(!bridge) ) + { + printk(XENLOG_ERR "Unable to find PCI bridge for %pp\n", &pdev->sbdf); + return NULL; + } + return bridge->dt_node; +} /* * Local variables: * mode: C diff --git a/xen/include/asm-arm/pci.h b/xen/include/asm-arm/pci.h index 603a1fc072d1..e6d4000e2ac8 100644 --- a/xen/include/asm-arm/pci.h +++ b/xen/include/asm-arm/pci.h @@ -99,6 +99,7 @@ void __iomem *pci_ecam_map_bus(struct pci_host_bridge *bridge, struct pci_host_bridge *pci_find_host_bridge(uint16_t segment, uint8_t bus); int pci_get_host_bridge_segment(const struct dt_device_node *node, uint16_t *segment); +struct dt_device_node *pci_find_host_bridge_node(struct device *dev); static always_inline bool is_pci_passthrough_enabled(void) {