| Message ID | 20170426100619.31758-3-lorenzo.pieralisi@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
On 2017/4/26 18:06, Lorenzo Pieralisi wrote: > The introduction of pci_bus_find_numa_node(pci_bus) allows at PCI > host bridge registration to detect the NUMA node for a given > struct pci_bus.dev. Implement an ACPI method that, through > the struct pci_bus.bridge ACPI companion, retrieve and return > the NUMA node corresponding to a given struct pci_bus.dev. > > Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> > Cc: Bjorn Helgaas <bhelgaas@google.com> > --- > drivers/pci/pci-acpi.c | 20 ++++++++++++++++++++ > include/linux/pci.h | 6 ++++++ > 2 files changed, 26 insertions(+) > > diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c > index 0018603..915da79 100644 > --- a/drivers/pci/pci-acpi.c > +++ b/drivers/pci/pci-acpi.c > @@ -10,6 +10,7 @@ > #include <linux/delay.h> > #include <linux/init.h> > #include <linux/irqdomain.h> > +#include <linux/numa.h> > #include <linux/pci.h> > #include <linux/msi.h> > #include <linux/pci_hotplug.h> > @@ -853,6 +854,25 @@ struct irq_domain *pci_host_bridge_acpi_msi_domain(struct pci_bus *bus) > return irq_find_matching_fwnode(fwnode, DOMAIN_BUS_PCI_MSI); > } > > +int acpi_pci_bus_find_numa_node(struct pci_bus *bus) > +{ > + int node = NUMA_NO_NODE; > + struct device *bridge = get_device(bus->bridge); > + > + if (!bridge) > + return node; > + > + if (has_acpi_companion(bridge)) { > + struct acpi_device *adev = to_acpi_device_node(bridge->fwnode); > + > + node = acpi_get_node(adev->handle); > + } > + > + put_device(bridge); > + > + return node; > +} > + It seems there is no function to call this, am I right? Another question is that: in the latest IORT revision C, "Proximity domain" has been added to the IORT spec. So when we enable NUMA for a PCIe device, should we also consider this? Thanks, Zhou > static int __init acpi_pci_init(void) > { > int ret; > diff --git a/include/linux/pci.h b/include/linux/pci.h > index 9e62462..b40d095 100644 > --- a/include/linux/pci.h > +++ b/include/linux/pci.h > @@ -1481,6 +1481,12 @@ static inline int acpi_pci_bus_find_domain_nr(struct pci_bus *bus) > #endif > int pci_bus_find_domain_nr(struct pci_bus *bus, struct device *parent); > #endif > +#ifdef CONFIG_ACPI > +int acpi_pci_bus_find_numa_node(struct pci_bus *bus); > +#else > +static inline int acpi_pci_bus_find_numa_node(struct pci_bus *bus) > +{ return NUMA_NO_NODE; } > +#endif > int pci_bus_find_numa_node(struct pci_bus *bus); > > /* some architectures require additional setup to direct VGA traffic */ >
On Mon, May 15, 2017 at 02:13:47PM +0800, Zhou Wang wrote: > On 2017/4/26 18:06, Lorenzo Pieralisi wrote: > > The introduction of pci_bus_find_numa_node(pci_bus) allows at PCI > > host bridge registration to detect the NUMA node for a given > > struct pci_bus.dev. Implement an ACPI method that, through > > the struct pci_bus.bridge ACPI companion, retrieve and return > > the NUMA node corresponding to a given struct pci_bus.dev. > > > > Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> > > Cc: Bjorn Helgaas <bhelgaas@google.com> > > --- > > drivers/pci/pci-acpi.c | 20 ++++++++++++++++++++ > > include/linux/pci.h | 6 ++++++ > > 2 files changed, 26 insertions(+) > > > > diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c > > index 0018603..915da79 100644 > > --- a/drivers/pci/pci-acpi.c > > +++ b/drivers/pci/pci-acpi.c > > @@ -10,6 +10,7 @@ > > #include <linux/delay.h> > > #include <linux/init.h> > > #include <linux/irqdomain.h> > > +#include <linux/numa.h> > > #include <linux/pci.h> > > #include <linux/msi.h> > > #include <linux/pci_hotplug.h> > > @@ -853,6 +854,25 @@ struct irq_domain *pci_host_bridge_acpi_msi_domain(struct pci_bus *bus) > > return irq_find_matching_fwnode(fwnode, DOMAIN_BUS_PCI_MSI); > > } > > > > +int acpi_pci_bus_find_numa_node(struct pci_bus *bus) > > +{ > > + int node = NUMA_NO_NODE; > > + struct device *bridge = get_device(bus->bridge); > > + > > + if (!bridge) > > + return node; > > + > > + if (has_acpi_companion(bridge)) { > > + struct acpi_device *adev = to_acpi_device_node(bridge->fwnode); > > + > > + node = acpi_get_node(adev->handle); > > + } > > + > > + put_device(bridge); > > + > > + return node; > > +} > > + > > It seems there is no function to call this, am I right? Sorry, I missed updating pci_bus_find_numa_node() while reshuffling the code, apologies. I will repost shortly. > Another question is that: in the latest IORT revision C, "Proximity > domain" has been added to the IORT spec. So when we enable NUMA for a > PCIe device, should we also consider this? That's for the SMMU device. Lorenzo > Thanks, > Zhou > > > static int __init acpi_pci_init(void) > > { > > int ret; > > diff --git a/include/linux/pci.h b/include/linux/pci.h > > index 9e62462..b40d095 100644 > > --- a/include/linux/pci.h > > +++ b/include/linux/pci.h > > @@ -1481,6 +1481,12 @@ static inline int acpi_pci_bus_find_domain_nr(struct pci_bus *bus) > > #endif > > int pci_bus_find_domain_nr(struct pci_bus *bus, struct device *parent); > > #endif > > +#ifdef CONFIG_ACPI > > +int acpi_pci_bus_find_numa_node(struct pci_bus *bus); > > +#else > > +static inline int acpi_pci_bus_find_numa_node(struct pci_bus *bus) > > +{ return NUMA_NO_NODE; } > > +#endif > > int pci_bus_find_numa_node(struct pci_bus *bus); > > > > /* some architectures require additional setup to direct VGA traffic */ > > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-acpi" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html
On 2017/5/15 17:17, Lorenzo Pieralisi wrote: > On Mon, May 15, 2017 at 02:13:47PM +0800, Zhou Wang wrote: >> On 2017/4/26 18:06, Lorenzo Pieralisi wrote: >>> The introduction of pci_bus_find_numa_node(pci_bus) allows at PCI >>> host bridge registration to detect the NUMA node for a given >>> struct pci_bus.dev. Implement an ACPI method that, through >>> the struct pci_bus.bridge ACPI companion, retrieve and return >>> the NUMA node corresponding to a given struct pci_bus.dev. >>> >>> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> >>> Cc: Bjorn Helgaas <bhelgaas@google.com> >>> --- >>> drivers/pci/pci-acpi.c | 20 ++++++++++++++++++++ >>> include/linux/pci.h | 6 ++++++ >>> 2 files changed, 26 insertions(+) >>> >>> diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c >>> index 0018603..915da79 100644 >>> --- a/drivers/pci/pci-acpi.c >>> +++ b/drivers/pci/pci-acpi.c >>> @@ -10,6 +10,7 @@ >>> #include <linux/delay.h> >>> #include <linux/init.h> >>> #include <linux/irqdomain.h> >>> +#include <linux/numa.h> >>> #include <linux/pci.h> >>> #include <linux/msi.h> >>> #include <linux/pci_hotplug.h> >>> @@ -853,6 +854,25 @@ struct irq_domain *pci_host_bridge_acpi_msi_domain(struct pci_bus *bus) >>> return irq_find_matching_fwnode(fwnode, DOMAIN_BUS_PCI_MSI); >>> } >>> >>> +int acpi_pci_bus_find_numa_node(struct pci_bus *bus) >>> +{ >>> + int node = NUMA_NO_NODE; >>> + struct device *bridge = get_device(bus->bridge); >>> + >>> + if (!bridge) >>> + return node; >>> + >>> + if (has_acpi_companion(bridge)) { >>> + struct acpi_device *adev = to_acpi_device_node(bridge->fwnode); >>> + >>> + node = acpi_get_node(adev->handle); >>> + } >>> + >>> + put_device(bridge); >>> + >>> + return node; >>> +} >>> + >> >> It seems there is no function to call this, am I right? > > Sorry, I missed updating pci_bus_find_numa_node() while reshuffling > the code, apologies. > > I will repost shortly. > >> Another question is that: in the latest IORT revision C, "Proximity >> domain" has been added to the IORT spec. So when we enable NUMA for a >> PCIe device, should we also consider this? > > That's for the SMMU device. Sorry, this is another problem. Now I get it that this Proximity domain is for SMMU itself. Thanks, Zhou > > Lorenzo > >> Thanks, >> Zhou >> >>> static int __init acpi_pci_init(void) >>> { >>> int ret; >>> diff --git a/include/linux/pci.h b/include/linux/pci.h >>> index 9e62462..b40d095 100644 >>> --- a/include/linux/pci.h >>> +++ b/include/linux/pci.h >>> @@ -1481,6 +1481,12 @@ static inline int acpi_pci_bus_find_domain_nr(struct pci_bus *bus) >>> #endif >>> int pci_bus_find_domain_nr(struct pci_bus *bus, struct device *parent); >>> #endif >>> +#ifdef CONFIG_ACPI >>> +int acpi_pci_bus_find_numa_node(struct pci_bus *bus); >>> +#else >>> +static inline int acpi_pci_bus_find_numa_node(struct pci_bus *bus) >>> +{ return NUMA_NO_NODE; } >>> +#endif >>> int pci_bus_find_numa_node(struct pci_bus *bus); >>> >>> /* some architectures require additional setup to direct VGA traffic */ >>> >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-acpi" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html > > . >
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index 0018603..915da79 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -10,6 +10,7 @@ #include <linux/delay.h> #include <linux/init.h> #include <linux/irqdomain.h> +#include <linux/numa.h> #include <linux/pci.h> #include <linux/msi.h> #include <linux/pci_hotplug.h> @@ -853,6 +854,25 @@ struct irq_domain *pci_host_bridge_acpi_msi_domain(struct pci_bus *bus) return irq_find_matching_fwnode(fwnode, DOMAIN_BUS_PCI_MSI); } +int acpi_pci_bus_find_numa_node(struct pci_bus *bus) +{ + int node = NUMA_NO_NODE; + struct device *bridge = get_device(bus->bridge); + + if (!bridge) + return node; + + if (has_acpi_companion(bridge)) { + struct acpi_device *adev = to_acpi_device_node(bridge->fwnode); + + node = acpi_get_node(adev->handle); + } + + put_device(bridge); + + return node; +} + static int __init acpi_pci_init(void) { int ret; diff --git a/include/linux/pci.h b/include/linux/pci.h index 9e62462..b40d095 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1481,6 +1481,12 @@ static inline int acpi_pci_bus_find_domain_nr(struct pci_bus *bus) #endif int pci_bus_find_domain_nr(struct pci_bus *bus, struct device *parent); #endif +#ifdef CONFIG_ACPI +int acpi_pci_bus_find_numa_node(struct pci_bus *bus); +#else +static inline int acpi_pci_bus_find_numa_node(struct pci_bus *bus) +{ return NUMA_NO_NODE; } +#endif int pci_bus_find_numa_node(struct pci_bus *bus); /* some architectures require additional setup to direct VGA traffic */
The introduction of pci_bus_find_numa_node(pci_bus) allows at PCI host bridge registration to detect the NUMA node for a given struct pci_bus.dev. Implement an ACPI method that, through the struct pci_bus.bridge ACPI companion, retrieve and return the NUMA node corresponding to a given struct pci_bus.dev. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Bjorn Helgaas <bhelgaas@google.com> --- drivers/pci/pci-acpi.c | 20 ++++++++++++++++++++ include/linux/pci.h | 6 ++++++ 2 files changed, 26 insertions(+)