drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c | 2 +- drivers/of/irq.c | 25 +++++---------------- drivers/pci/msi/irqdomain.c | 2 +- include/linux/of_irq.h | 6 ----- 4 files changed, 7 insertions(+), 28 deletions(-)
With the introduction of the of_msi_xlate() function, the OF layer
provides an API to map a device ID and retrieve the MSI controller
node the ID is mapped to with a single call.
of_msi_map_id() is currently used to map a deviceID to a specific
MSI controller node; of_msi_xlate() can be used for that purpose
too, there is no need to keep the two functions.
Convert of_msi_map_id() to of_msi_xlate() calls and update the
of_msi_xlate() documentation to describe how the struct device_node
pointer passed in should be set-up to either provide the MSI controller
node target or receive its pointer upon mapping completion.
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Rob Herring <robh@kernel.org>
Cc: Marc Zyngier <maz@kernel.org>
---
As suggested by RobH:
https://lore.kernel.org/lkml/20250627213241.GA168190-robh@kernel.org/
drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c | 2 +-
drivers/of/irq.c | 25 +++++----------------
drivers/pci/msi/irqdomain.c | 2 +-
include/linux/of_irq.h | 6 -----
4 files changed, 7 insertions(+), 28 deletions(-)
diff --git a/drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c b/drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c
index 11549d85f23b..b5785472765a 100644
--- a/drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c
+++ b/drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c
@@ -30,7 +30,7 @@ static u32 fsl_mc_msi_domain_get_msi_id(struct irq_domain *domain,
u32 out_id;
of_node = irq_domain_get_of_node(domain);
- out_id = of_node ? of_msi_map_id(&mc_dev->dev, of_node, mc_dev->icid) :
+ out_id = of_node ? of_msi_xlate(&mc_dev->dev, &of_node, mc_dev->icid) :
iort_msi_map_id(&mc_dev->dev, mc_dev->icid);
return out_id;
diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index 74aaea61de13..e7c12abd10ab 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -673,13 +673,14 @@ void __init of_irq_init(const struct of_device_id *matches)
/**
* of_msi_xlate - map a MSI ID and find relevant MSI controller node
* @dev: device for which the mapping is to be done.
- * @msi_np: Pointer to store the MSI controller node
+ * @msi_np: Pointer to target MSI controller node
* @id_in: Device ID.
*
* Walk up the device hierarchy looking for devices with a "msi-map"
- * property. If found, apply the mapping to @id_in. @msi_np pointed
- * value must be NULL on entry, if an MSI controller is found @msi_np is
- * initialized to the MSI controller node with a reference held.
+ * property. If found, apply the mapping to @id_in.
+ * If @msi_np points to a non-NULL device node pointer, only entries targeting
+ * that node will be matched; if it points to a NULL value, it will receive the
+ * device node of the first matching target phandle, with a reference held.
*
* Returns: The mapped MSI id.
*/
@@ -699,22 +700,6 @@ u32 of_msi_xlate(struct device *dev, struct device_node **msi_np, u32 id_in)
return id_out;
}
-/**
- * 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.
- * @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 @id_in.
- *
- * Return: The mapped MSI ID.
- */
-u32 of_msi_map_id(struct device *dev, struct device_node *msi_np, u32 id_in)
-{
- return of_msi_xlate(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.
diff --git a/drivers/pci/msi/irqdomain.c b/drivers/pci/msi/irqdomain.c
index 0938ef7ebabf..555c61b1fc36 100644
--- a/drivers/pci/msi/irqdomain.c
+++ b/drivers/pci/msi/irqdomain.c
@@ -422,7 +422,7 @@ u32 pci_msi_domain_get_msi_rid(struct irq_domain *domain, struct pci_dev *pdev)
pci_for_each_dma_alias(pdev, get_msi_id_cb, &rid);
of_node = irq_domain_get_of_node(domain);
- rid = of_node ? of_msi_map_id(&pdev->dev, of_node, rid) :
+ rid = of_node ? of_msi_xlate(&pdev->dev, &of_node, rid) :
iort_msi_map_id(&pdev->dev, rid);
return rid;
diff --git a/include/linux/of_irq.h b/include/linux/of_irq.h
index a480063c9cb1..1db8543dfc8a 100644
--- a/include/linux/of_irq.h
+++ b/include/linux/of_irq.h
@@ -55,7 +55,6 @@ extern struct irq_domain *of_msi_map_get_device_domain(struct device *dev,
u32 bus_token);
extern void of_msi_configure(struct device *dev, const struct device_node *np);
extern u32 of_msi_xlate(struct device *dev, struct device_node **msi_np, u32 id_in);
-u32 of_msi_map_id(struct device *dev, struct device_node *msi_np, u32 id_in);
#else
static inline void of_irq_init(const struct of_device_id *matches)
{
@@ -105,11 +104,6 @@ static inline u32 of_msi_xlate(struct device *dev, struct device_node **msi_np,
{
return id_in;
}
-static inline u32 of_msi_map_id(struct device *dev,
- struct device_node *msi_np, u32 id_in)
-{
- return id_in;
-}
#endif
#if defined(CONFIG_OF_IRQ) || defined(CONFIG_SPARC)
--
2.48.0On Tue, 05 Aug 2025 15:34:43 +0200, Lorenzo Pieralisi wrote: > With the introduction of the of_msi_xlate() function, the OF layer > provides an API to map a device ID and retrieve the MSI controller > node the ID is mapped to with a single call. > > of_msi_map_id() is currently used to map a deviceID to a specific > MSI controller node; of_msi_xlate() can be used for that purpose > too, there is no need to keep the two functions. > > Convert of_msi_map_id() to of_msi_xlate() calls and update the > of_msi_xlate() documentation to describe how the struct device_node > pointer passed in should be set-up to either provide the MSI controller > node target or receive its pointer upon mapping completion. > > Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org> > Cc: Thomas Gleixner <tglx@linutronix.de> > Cc: Rob Herring <robh@kernel.org> > Cc: Marc Zyngier <maz@kernel.org> > --- > As suggested by RobH: > > https://lore.kernel.org/lkml/20250627213241.GA168190-robh@kernel.org/ > > drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c | 2 +- > drivers/of/irq.c | 25 +++++---------------- > drivers/pci/msi/irqdomain.c | 2 +- > include/linux/of_irq.h | 6 ----- > 4 files changed, 7 insertions(+), 28 deletions(-) > Applied, thanks!
On Tue, Aug 05, 2025 at 03:34:43PM +0200, Lorenzo Pieralisi wrote: > With the introduction of the of_msi_xlate() function, the OF layer > provides an API to map a device ID and retrieve the MSI controller > node the ID is mapped to with a single call. > > of_msi_map_id() is currently used to map a deviceID to a specific > MSI controller node; of_msi_xlate() can be used for that purpose > too, there is no need to keep the two functions. > > Convert of_msi_map_id() to of_msi_xlate() calls and update the > of_msi_xlate() documentation to describe how the struct device_node > pointer passed in should be set-up to either provide the MSI controller > node target or receive its pointer upon mapping completion. > > Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org> > Cc: Thomas Gleixner <tglx@linutronix.de> > Cc: Rob Herring <robh@kernel.org> > Cc: Marc Zyngier <maz@kernel.org> > --- > As suggested by RobH: > > https://lore.kernel.org/lkml/20250627213241.GA168190-robh@kernel.org/ > > drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c | 2 +- > drivers/of/irq.c | 25 +++++---------------- > drivers/pci/msi/irqdomain.c | 2 +- > include/linux/of_irq.h | 6 ----- > 4 files changed, 7 insertions(+), 28 deletions(-) Looks good to me. I'm happy to take it with some acks. Rob
On Wed, Aug 13 2025 at 13:52, Rob Herring wrote: > On Tue, Aug 05, 2025 at 03:34:43PM +0200, Lorenzo Pieralisi wrote: >> With the introduction of the of_msi_xlate() function, the OF layer >> provides an API to map a device ID and retrieve the MSI controller >> node the ID is mapped to with a single call. >> >> of_msi_map_id() is currently used to map a deviceID to a specific >> MSI controller node; of_msi_xlate() can be used for that purpose >> too, there is no need to keep the two functions. >> >> Convert of_msi_map_id() to of_msi_xlate() calls and update the >> of_msi_xlate() documentation to describe how the struct device_node >> pointer passed in should be set-up to either provide the MSI controller >> node target or receive its pointer upon mapping completion. >> >> Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org> >> Cc: Thomas Gleixner <tglx@linutronix.de> >> Cc: Rob Herring <robh@kernel.org> >> Cc: Marc Zyngier <maz@kernel.org> >> --- >> As suggested by RobH: >> >> https://lore.kernel.org/lkml/20250627213241.GA168190-robh@kernel.org/ >> >> drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c | 2 +- >> drivers/of/irq.c | 25 +++++---------------- >> drivers/pci/msi/irqdomain.c | 2 +- >> include/linux/of_irq.h | 6 ----- >> 4 files changed, 7 insertions(+), 28 deletions(-) > > Looks good to me. I'm happy to take it with some acks. > Acked-by: Thomas Gleixner <tglx@linutronix.de>
On Tue, Aug 05, 2025 at 03:34:43PM +0200, Lorenzo Pieralisi wrote:
> With the introduction of the of_msi_xlate() function, the OF layer
> provides an API to map a device ID and retrieve the MSI controller
> node the ID is mapped to with a single call.
>
> of_msi_map_id() is currently used to map a deviceID to a specific
> MSI controller node; of_msi_xlate() can be used for that purpose
> too, there is no need to keep the two functions.
>
> Convert of_msi_map_id() to of_msi_xlate() calls and update the
> of_msi_xlate() documentation to describe how the struct device_node
> pointer passed in should be set-up to either provide the MSI controller
> node target or receive its pointer upon mapping completion.
>
> Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Rob Herring <robh@kernel.org>
> Cc: Marc Zyngier <maz@kernel.org>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
> ---
> As suggested by RobH:
>
> https://lore.kernel.org/lkml/20250627213241.GA168190-robh@kernel.org/
>
> drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c | 2 +-
> drivers/of/irq.c | 25 +++++----------------
> drivers/pci/msi/irqdomain.c | 2 +-
> include/linux/of_irq.h | 6 -----
> 4 files changed, 7 insertions(+), 28 deletions(-)
>
> diff --git a/drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c b/drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c
> index 11549d85f23b..b5785472765a 100644
> --- a/drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c
> +++ b/drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c
> @@ -30,7 +30,7 @@ static u32 fsl_mc_msi_domain_get_msi_id(struct irq_domain *domain,
> u32 out_id;
>
> of_node = irq_domain_get_of_node(domain);
> - out_id = of_node ? of_msi_map_id(&mc_dev->dev, of_node, mc_dev->icid) :
> + out_id = of_node ? of_msi_xlate(&mc_dev->dev, &of_node, mc_dev->icid) :
> iort_msi_map_id(&mc_dev->dev, mc_dev->icid);
>
> return out_id;
> diff --git a/drivers/of/irq.c b/drivers/of/irq.c
> index 74aaea61de13..e7c12abd10ab 100644
> --- a/drivers/of/irq.c
> +++ b/drivers/of/irq.c
> @@ -673,13 +673,14 @@ void __init of_irq_init(const struct of_device_id *matches)
> /**
> * of_msi_xlate - map a MSI ID and find relevant MSI controller node
> * @dev: device for which the mapping is to be done.
> - * @msi_np: Pointer to store the MSI controller node
> + * @msi_np: Pointer to target MSI controller node
> * @id_in: Device ID.
> *
> * Walk up the device hierarchy looking for devices with a "msi-map"
> - * property. If found, apply the mapping to @id_in. @msi_np pointed
> - * value must be NULL on entry, if an MSI controller is found @msi_np is
> - * initialized to the MSI controller node with a reference held.
> + * property. If found, apply the mapping to @id_in.
> + * If @msi_np points to a non-NULL device node pointer, only entries targeting
> + * that node will be matched; if it points to a NULL value, it will receive the
> + * device node of the first matching target phandle, with a reference held.
> *
> * Returns: The mapped MSI id.
> */
> @@ -699,22 +700,6 @@ u32 of_msi_xlate(struct device *dev, struct device_node **msi_np, u32 id_in)
> return id_out;
> }
>
> -/**
> - * 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.
> - * @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 @id_in.
> - *
> - * Return: The mapped MSI ID.
> - */
> -u32 of_msi_map_id(struct device *dev, struct device_node *msi_np, u32 id_in)
> -{
> - return of_msi_xlate(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.
> diff --git a/drivers/pci/msi/irqdomain.c b/drivers/pci/msi/irqdomain.c
> index 0938ef7ebabf..555c61b1fc36 100644
> --- a/drivers/pci/msi/irqdomain.c
> +++ b/drivers/pci/msi/irqdomain.c
> @@ -422,7 +422,7 @@ u32 pci_msi_domain_get_msi_rid(struct irq_domain *domain, struct pci_dev *pdev)
> pci_for_each_dma_alias(pdev, get_msi_id_cb, &rid);
>
> of_node = irq_domain_get_of_node(domain);
> - rid = of_node ? of_msi_map_id(&pdev->dev, of_node, rid) :
> + rid = of_node ? of_msi_xlate(&pdev->dev, &of_node, rid) :
> iort_msi_map_id(&pdev->dev, rid);
>
> return rid;
> diff --git a/include/linux/of_irq.h b/include/linux/of_irq.h
> index a480063c9cb1..1db8543dfc8a 100644
> --- a/include/linux/of_irq.h
> +++ b/include/linux/of_irq.h
> @@ -55,7 +55,6 @@ extern struct irq_domain *of_msi_map_get_device_domain(struct device *dev,
> u32 bus_token);
> extern void of_msi_configure(struct device *dev, const struct device_node *np);
> extern u32 of_msi_xlate(struct device *dev, struct device_node **msi_np, u32 id_in);
> -u32 of_msi_map_id(struct device *dev, struct device_node *msi_np, u32 id_in);
> #else
> static inline void of_irq_init(const struct of_device_id *matches)
> {
> @@ -105,11 +104,6 @@ static inline u32 of_msi_xlate(struct device *dev, struct device_node **msi_np,
> {
> return id_in;
> }
> -static inline u32 of_msi_map_id(struct device *dev,
> - struct device_node *msi_np, u32 id_in)
> -{
> - return id_in;
> -}
> #endif
>
> #if defined(CONFIG_OF_IRQ) || defined(CONFIG_SPARC)
> --
> 2.48.0
>
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