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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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31fd3becb9
Add an of_msi_xlate() helper that maps a device ID and returns the device node of the MSI controller the device ID is mapped to. Required by core functions that need an MSI controller device node pointer at the same time as a mapped device ID, of_msi_map_id() is not sufficient for that purpose. Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org> Reviewed-by: Marc Zyngier <maz@kernel.org> Cc: Rob Herring <robh@kernel.org> Cc: Marc Zyngier <maz@kernel.org> Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Link: https://lore.kernel.org/r/20250703-gicv5-host-v7-24-12e71f1b3528@kernel.org Signed-off-by: Marc Zyngier <maz@kernel.org>
132 lines
4.0 KiB
C
132 lines
4.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __OF_IRQ_H
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#define __OF_IRQ_H
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/irq.h>
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#include <linux/irqdomain.h>
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#include <linux/ioport.h>
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#include <linux/of.h>
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typedef int (*of_irq_init_cb_t)(struct device_node *, struct device_node *);
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/*
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* Workarounds only applied to 32bit powermac machines
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*/
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#define OF_IMAP_OLDWORLD_MAC 0x00000001
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#define OF_IMAP_NO_PHANDLE 0x00000002
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#if defined(CONFIG_PPC32) && defined(CONFIG_PPC_PMAC)
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extern unsigned int of_irq_workarounds;
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extern struct device_node *of_irq_dflt_pic;
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int of_irq_parse_oldworld(const struct device_node *device, int index,
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struct of_phandle_args *out_irq);
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#else /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
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#define of_irq_workarounds (0)
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#define of_irq_dflt_pic (NULL)
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static inline int of_irq_parse_oldworld(const struct device_node *device, int index,
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struct of_phandle_args *out_irq)
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{
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return -EINVAL;
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}
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#endif /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
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extern int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq);
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extern unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data);
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extern int of_irq_to_resource(struct device_node *dev, int index,
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struct resource *r);
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#ifdef CONFIG_OF_IRQ
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extern void of_irq_init(const struct of_device_id *matches);
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extern int of_irq_parse_one(struct device_node *device, int index,
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struct of_phandle_args *out_irq);
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extern int of_irq_count(struct device_node *dev);
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extern int of_irq_get(struct device_node *dev, int index);
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extern int of_irq_get_byname(struct device_node *dev, const char *name);
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extern int of_irq_to_resource_table(struct device_node *dev,
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struct resource *res, int nr_irqs);
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extern struct device_node *of_irq_find_parent(struct device_node *child);
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extern struct irq_domain *of_msi_get_domain(struct device *dev,
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const struct device_node *np,
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enum irq_domain_bus_token token);
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extern struct irq_domain *of_msi_map_get_device_domain(struct device *dev,
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u32 id,
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u32 bus_token);
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extern void of_msi_configure(struct device *dev, const struct device_node *np);
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extern u32 of_msi_xlate(struct device *dev, struct device_node **msi_np, u32 id_in);
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u32 of_msi_map_id(struct device *dev, struct device_node *msi_np, u32 id_in);
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#else
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static inline void of_irq_init(const struct of_device_id *matches)
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{
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}
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static inline int of_irq_parse_one(struct device_node *device, int index,
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struct of_phandle_args *out_irq)
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{
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return -EINVAL;
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}
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static inline int of_irq_count(struct device_node *dev)
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{
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return 0;
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}
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static inline int of_irq_get(struct device_node *dev, int index)
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{
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return 0;
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}
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static inline int of_irq_get_byname(struct device_node *dev, const char *name)
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{
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return 0;
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}
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static inline int of_irq_to_resource_table(struct device_node *dev,
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struct resource *res, int nr_irqs)
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{
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return 0;
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}
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static inline void *of_irq_find_parent(struct device_node *child)
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{
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return NULL;
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}
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static inline struct irq_domain *of_msi_get_domain(struct device *dev,
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struct device_node *np,
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enum irq_domain_bus_token token)
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{
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return NULL;
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}
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static inline struct irq_domain *of_msi_map_get_device_domain(struct device *dev,
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u32 id, u32 bus_token)
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{
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return NULL;
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}
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static inline void of_msi_configure(struct device *dev, struct device_node *np)
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{
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}
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static inline u32 of_msi_xlate(struct device *dev, struct device_node **msi_np, u32 id_in)
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{
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return id_in;
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}
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static inline u32 of_msi_map_id(struct device *dev,
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struct device_node *msi_np, u32 id_in)
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{
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return id_in;
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}
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#endif
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#if defined(CONFIG_OF_IRQ) || defined(CONFIG_SPARC)
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/*
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* irq_of_parse_and_map() is used by all OF enabled platforms; but SPARC
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* implements it differently. However, the prototype is the same for all,
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* so declare it here regardless of the CONFIG_OF_IRQ setting.
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*/
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extern unsigned int irq_of_parse_and_map(struct device_node *node, int index);
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#else /* !CONFIG_OF && !CONFIG_SPARC */
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static inline unsigned int irq_of_parse_and_map(struct device_node *dev,
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int index)
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{
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return 0;
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}
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#endif /* !CONFIG_OF */
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#endif /* __OF_IRQ_H */
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