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82b9b4243c
While msi-parent is used to point to the MSI controller that works for all the devices behind a root complex, it doesn't allow configurations where each individual device can be routed to a separate MSI controller. The msi-map property provides this flexibility (and much more), so let's add a utility function that parses it, and return the corresponding MSI domain. Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
115 lines
3.4 KiB
C
115 lines
3.4 KiB
C
#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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extern int of_irq_parse_oldworld(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(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 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 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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extern void of_irq_init(const struct of_device_id *matches);
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#ifdef CONFIG_OF_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 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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extern struct irq_domain *of_msi_map_get_device_domain(struct device *dev,
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u32 rid);
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#else
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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 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 rid)
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{
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return NULL;
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}
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#endif
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#if defined(CONFIG_OF)
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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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extern struct device_node *of_irq_find_parent(struct device_node *child);
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extern void of_msi_configure(struct device *dev, struct device_node *np);
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u32 of_msi_map_rid(struct device *dev, struct device_node *msi_np, u32 rid_in);
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#else /* !CONFIG_OF */
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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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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 u32 of_msi_map_rid(struct device *dev,
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struct device_node *msi_np, u32 rid_in)
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{
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return rid_in;
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}
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#endif /* !CONFIG_OF */
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#endif /* __OF_IRQ_H */
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