| Message ID | 20200521130008.8266-11-lorenzo.pieralisi@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | ACPI/OF: Upgrade MSI/IOMMU ID mapping APIs | expand |
On Thu, May 21, 2020 at 7:00 AM Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> wrote: > > There is nothing PCI bus specific in the of_msi_map_rid() > implementation other than the requester ID tag for the input > ID space. Rename requester ID to a more generic ID so that > the translation code can be used by all busses that require > input/output ID translations. > > Leave a wrapper function of_msi_map_rid() in place to keep > existing PCI code mapping requester ID syntactically unchanged. > > No functional change intended. > > Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> > Cc: Rob Herring <robh+dt@kernel.org> > Cc: Marc Zyngier <maz@kernel.org> > --- > drivers/of/irq.c | 28 ++++++++++++++-------------- > include/linux/of_irq.h | 14 ++++++++++++-- > 2 files changed, 26 insertions(+), 16 deletions(-) > > diff --git a/drivers/of/irq.c b/drivers/of/irq.c > index 48a40326984f..25d17b8a1a1a 100644 > --- a/drivers/of/irq.c > +++ b/drivers/of/irq.c > @@ -576,43 +576,43 @@ void __init of_irq_init(const struct of_device_id *matches) > } > } > > -static u32 __of_msi_map_rid(struct device *dev, struct device_node **np, > - u32 rid_in) > +static u32 __of_msi_map_id(struct device *dev, struct device_node **np, > + u32 id_in) > { > struct device *parent_dev; > - u32 rid_out = rid_in; > + u32 id_out = id_in; > > /* > * Walk up the device parent links looking for one with a > * "msi-map" property. > */ > for (parent_dev = dev; parent_dev; parent_dev = parent_dev->parent) > - if (!of_map_rid(parent_dev->of_node, rid_in, "msi-map", > - "msi-map-mask", np, &rid_out)) > + if (!of_map_id(parent_dev->of_node, id_in, "msi-map", > + "msi-map-mask", np, &id_out)) > break; > - return rid_out; > + return id_out; > } > > /** > - * of_msi_map_rid - Map a MSI requester ID for a device. > + * of_msi_map_id - Map a MSI ID for a device. > * @dev: device for which the mapping is to be done. > * @msi_np: device node of the expected msi controller. > - * @rid_in: unmapped MSI requester ID for the device. > + * @id_in: unmapped MSI ID for the device. > * > * Walk up the device hierarchy looking for devices with a "msi-map" > - * property. If found, apply the mapping to @rid_in. > + * property. If found, apply the mapping to @id_in. > * > - * Returns the mapped MSI requester ID. > + * Returns the mapped MSI ID. > */ > -u32 of_msi_map_rid(struct device *dev, struct device_node *msi_np, u32 rid_in) > +u32 of_msi_map_id(struct device *dev, struct device_node *msi_np, u32 id_in) > { > - return __of_msi_map_rid(dev, &msi_np, rid_in); > + return __of_msi_map_id(dev, &msi_np, id_in); > } > > /** > * of_msi_map_get_device_domain - Use msi-map to find the relevant MSI domain > * @dev: device for which the mapping is to be done. > - * @rid: Requester ID for the device. > + * @id: Device ID. > * @bus_token: Bus token > * > * Walk up the device hierarchy looking for devices with a "msi-map" > @@ -625,7 +625,7 @@ struct irq_domain *of_msi_map_get_device_domain(struct device *dev, u32 id, > { > struct device_node *np = NULL; > > - __of_msi_map_rid(dev, &np, id); > + __of_msi_map_id(dev, &np, id); > return irq_find_matching_host(np, bus_token); > } > > diff --git a/include/linux/of_irq.h b/include/linux/of_irq.h > index 7142a3722758..cf9cb1e545ce 100644 > --- a/include/linux/of_irq.h > +++ b/include/linux/of_irq.h > @@ -55,7 +55,12 @@ extern struct irq_domain *of_msi_map_get_device_domain(struct device *dev, > u32 id, > u32 bus_token); > extern void of_msi_configure(struct device *dev, struct device_node *np); > -u32 of_msi_map_rid(struct device *dev, struct device_node *msi_np, u32 rid_in); > +u32 of_msi_map_id(struct device *dev, struct device_node *msi_np, u32 id_in); > +static inline u32 of_msi_map_rid(struct device *dev, > + struct device_node *msi_np, u32 rid_in) > +{ > + return of_msi_map_id(dev, msi_np, rid_in); > +} > #else > static inline int of_irq_count(struct device_node *dev) > { > @@ -93,10 +98,15 @@ static inline struct irq_domain *of_msi_map_get_device_domain(struct device *dev > static inline void of_msi_configure(struct device *dev, struct device_node *np) > { > } > +static inline u32 of_msi_map_id(struct device *dev, > + struct device_node *msi_np, u32 id_in) > +{ > + return id_in; > +} > static inline u32 of_msi_map_rid(struct device *dev, > struct device_node *msi_np, u32 rid_in) Move this out of the ifdef and you only need it declared once. But again, I think I'd just kill of_msi_map_rid. > { > - return rid_in; > + return of_msi_map_id(dev, msi_np, rid_in); > } > #endif > > -- > 2.26.1 >
On Thu, May 21, 2020 at 05:17:27PM -0600, Rob Herring wrote: > On Thu, May 21, 2020 at 7:00 AM Lorenzo Pieralisi > <lorenzo.pieralisi@arm.com> wrote: > > > > There is nothing PCI bus specific in the of_msi_map_rid() > > implementation other than the requester ID tag for the input > > ID space. Rename requester ID to a more generic ID so that > > the translation code can be used by all busses that require > > input/output ID translations. > > > > Leave a wrapper function of_msi_map_rid() in place to keep > > existing PCI code mapping requester ID syntactically unchanged. > > > > No functional change intended. > > > > Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> > > Cc: Rob Herring <robh+dt@kernel.org> > > Cc: Marc Zyngier <maz@kernel.org> > > --- > > drivers/of/irq.c | 28 ++++++++++++++-------------- > > include/linux/of_irq.h | 14 ++++++++++++-- > > 2 files changed, 26 insertions(+), 16 deletions(-) > > > > diff --git a/drivers/of/irq.c b/drivers/of/irq.c > > index 48a40326984f..25d17b8a1a1a 100644 > > --- a/drivers/of/irq.c > > +++ b/drivers/of/irq.c > > @@ -576,43 +576,43 @@ void __init of_irq_init(const struct of_device_id *matches) > > } > > } > > > > -static u32 __of_msi_map_rid(struct device *dev, struct device_node **np, > > - u32 rid_in) > > +static u32 __of_msi_map_id(struct device *dev, struct device_node **np, > > + u32 id_in) > > { > > struct device *parent_dev; > > - u32 rid_out = rid_in; > > + u32 id_out = id_in; > > > > /* > > * Walk up the device parent links looking for one with a > > * "msi-map" property. > > */ > > for (parent_dev = dev; parent_dev; parent_dev = parent_dev->parent) > > - if (!of_map_rid(parent_dev->of_node, rid_in, "msi-map", > > - "msi-map-mask", np, &rid_out)) > > + if (!of_map_id(parent_dev->of_node, id_in, "msi-map", > > + "msi-map-mask", np, &id_out)) > > break; > > - return rid_out; > > + return id_out; > > } > > > > /** > > - * of_msi_map_rid - Map a MSI requester ID for a device. > > + * of_msi_map_id - Map a MSI ID for a device. > > * @dev: device for which the mapping is to be done. > > * @msi_np: device node of the expected msi controller. > > - * @rid_in: unmapped MSI requester ID for the device. > > + * @id_in: unmapped MSI ID for the device. > > * > > * Walk up the device hierarchy looking for devices with a "msi-map" > > - * property. If found, apply the mapping to @rid_in. > > + * property. If found, apply the mapping to @id_in. > > * > > - * Returns the mapped MSI requester ID. > > + * Returns the mapped MSI ID. > > */ > > -u32 of_msi_map_rid(struct device *dev, struct device_node *msi_np, u32 rid_in) > > +u32 of_msi_map_id(struct device *dev, struct device_node *msi_np, u32 id_in) > > { > > - return __of_msi_map_rid(dev, &msi_np, rid_in); > > + return __of_msi_map_id(dev, &msi_np, id_in); > > } > > > > /** > > * of_msi_map_get_device_domain - Use msi-map to find the relevant MSI domain > > * @dev: device for which the mapping is to be done. > > - * @rid: Requester ID for the device. > > + * @id: Device ID. > > * @bus_token: Bus token > > * > > * Walk up the device hierarchy looking for devices with a "msi-map" > > @@ -625,7 +625,7 @@ struct irq_domain *of_msi_map_get_device_domain(struct device *dev, u32 id, > > { > > struct device_node *np = NULL; > > > > - __of_msi_map_rid(dev, &np, id); > > + __of_msi_map_id(dev, &np, id); > > return irq_find_matching_host(np, bus_token); > > } > > > > diff --git a/include/linux/of_irq.h b/include/linux/of_irq.h > > index 7142a3722758..cf9cb1e545ce 100644 > > --- a/include/linux/of_irq.h > > +++ b/include/linux/of_irq.h > > @@ -55,7 +55,12 @@ extern struct irq_domain *of_msi_map_get_device_domain(struct device *dev, > > u32 id, > > u32 bus_token); > > extern void of_msi_configure(struct device *dev, struct device_node *np); > > -u32 of_msi_map_rid(struct device *dev, struct device_node *msi_np, u32 rid_in); > > +u32 of_msi_map_id(struct device *dev, struct device_node *msi_np, u32 id_in); > > +static inline u32 of_msi_map_rid(struct device *dev, > > + struct device_node *msi_np, u32 rid_in) > > +{ > > + return of_msi_map_id(dev, msi_np, rid_in); > > +} > > #else > > static inline int of_irq_count(struct device_node *dev) > > { > > @@ -93,10 +98,15 @@ static inline struct irq_domain *of_msi_map_get_device_domain(struct device *dev > > static inline void of_msi_configure(struct device *dev, struct device_node *np) > > { > > } > > +static inline u32 of_msi_map_id(struct device *dev, > > + struct device_node *msi_np, u32 id_in) > > +{ > > + return id_in; > > +} > > static inline u32 of_msi_map_rid(struct device *dev, > > struct device_node *msi_np, u32 rid_in) > > Move this out of the ifdef and you only need it declared once. > > But again, I think I'd just kill of_msi_map_rid. Yes I don't think there is a clear benefit in keeping the _rid interface. Thanks, Lorenzo
diff --git a/drivers/of/irq.c b/drivers/of/irq.c index 48a40326984f..25d17b8a1a1a 100644 --- a/drivers/of/irq.c +++ b/drivers/of/irq.c @@ -576,43 +576,43 @@ void __init of_irq_init(const struct of_device_id *matches) } } -static u32 __of_msi_map_rid(struct device *dev, struct device_node **np, - u32 rid_in) +static u32 __of_msi_map_id(struct device *dev, struct device_node **np, + u32 id_in) { struct device *parent_dev; - u32 rid_out = rid_in; + u32 id_out = id_in; /* * Walk up the device parent links looking for one with a * "msi-map" property. */ for (parent_dev = dev; parent_dev; parent_dev = parent_dev->parent) - if (!of_map_rid(parent_dev->of_node, rid_in, "msi-map", - "msi-map-mask", np, &rid_out)) + if (!of_map_id(parent_dev->of_node, id_in, "msi-map", + "msi-map-mask", np, &id_out)) break; - return rid_out; + return id_out; } /** - * of_msi_map_rid - Map a MSI requester ID for a device. + * of_msi_map_id - Map a MSI ID for a device. * @dev: device for which the mapping is to be done. * @msi_np: device node of the expected msi controller. - * @rid_in: unmapped MSI requester ID for the device. + * @id_in: unmapped MSI ID for the device. * * Walk up the device hierarchy looking for devices with a "msi-map" - * property. If found, apply the mapping to @rid_in. + * property. If found, apply the mapping to @id_in. * - * Returns the mapped MSI requester ID. + * Returns the mapped MSI ID. */ -u32 of_msi_map_rid(struct device *dev, struct device_node *msi_np, u32 rid_in) +u32 of_msi_map_id(struct device *dev, struct device_node *msi_np, u32 id_in) { - return __of_msi_map_rid(dev, &msi_np, rid_in); + return __of_msi_map_id(dev, &msi_np, id_in); } /** * of_msi_map_get_device_domain - Use msi-map to find the relevant MSI domain * @dev: device for which the mapping is to be done. - * @rid: Requester ID for the device. + * @id: Device ID. * @bus_token: Bus token * * Walk up the device hierarchy looking for devices with a "msi-map" @@ -625,7 +625,7 @@ struct irq_domain *of_msi_map_get_device_domain(struct device *dev, u32 id, { struct device_node *np = NULL; - __of_msi_map_rid(dev, &np, id); + __of_msi_map_id(dev, &np, id); return irq_find_matching_host(np, bus_token); } diff --git a/include/linux/of_irq.h b/include/linux/of_irq.h index 7142a3722758..cf9cb1e545ce 100644 --- a/include/linux/of_irq.h +++ b/include/linux/of_irq.h @@ -55,7 +55,12 @@ extern struct irq_domain *of_msi_map_get_device_domain(struct device *dev, u32 id, u32 bus_token); extern void of_msi_configure(struct device *dev, struct device_node *np); -u32 of_msi_map_rid(struct device *dev, struct device_node *msi_np, u32 rid_in); +u32 of_msi_map_id(struct device *dev, struct device_node *msi_np, u32 id_in); +static inline u32 of_msi_map_rid(struct device *dev, + struct device_node *msi_np, u32 rid_in) +{ + return of_msi_map_id(dev, msi_np, rid_in); +} #else static inline int of_irq_count(struct device_node *dev) { @@ -93,10 +98,15 @@ static inline struct irq_domain *of_msi_map_get_device_domain(struct device *dev static inline void of_msi_configure(struct device *dev, struct device_node *np) { } +static inline u32 of_msi_map_id(struct device *dev, + struct device_node *msi_np, u32 id_in) +{ + return id_in; +} static inline u32 of_msi_map_rid(struct device *dev, struct device_node *msi_np, u32 rid_in) { - return rid_in; + return of_msi_map_id(dev, msi_np, rid_in); } #endif
There is nothing PCI bus specific in the of_msi_map_rid() implementation other than the requester ID tag for the input ID space. Rename requester ID to a more generic ID so that the translation code can be used by all busses that require input/output ID translations. Leave a wrapper function of_msi_map_rid() in place to keep existing PCI code mapping requester ID syntactically unchanged. No functional change intended. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Marc Zyngier <maz@kernel.org> --- drivers/of/irq.c | 28 ++++++++++++++-------------- include/linux/of_irq.h | 14 ++++++++++++-- 2 files changed, 26 insertions(+), 16 deletions(-)