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irq_domain: Remove 'new' irq_domain in favour of the ppc one

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This patch removes the simplistic implementation of irq_domains and enables
the powerpc infrastructure for all irq_domain users.  The powerpc
infrastructure includes support for complex mappings between Linux and
hardware irq numbers, and can manage allocation of irq_descs.

This patch also converts the few users of irq_domain_add()/irq_domain_del()
to call irq_domain_add_legacy() instead.

v3: Fix bug that set up too many irqs in translation range.
v2: Fix removal of irq_alloc_descs() call in gic driver

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Milton Miller <miltonm@bga.com>
Tested-by: Olof Johansson <olof@lixom.net>
This commit is contained in:
Grant Likely
2012-02-14 14:06:57 -07:00
parent 5769089ac7
commit 75294957be
9 changed files with 71 additions and 263 deletions
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45
include/linux/irqdomain.h
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@@ -55,9 +55,6 @@ typedef unsigned long irq_hw_number_t;
* @map: Create or update a mapping between a virtual irq number and a hw
* irq number. This is called only once for a given mapping.
* @unmap: Dispose of such a mapping
* @to_irq: (optional) given a local hardware irq number, return the linux
* irq number. If to_irq is not implemented, then the irq_domain
* will use this translation: irq = (domain->irq_base + hwirq)
* @xlate: Given a device tree node and interrupt specifier, decode
* the hardware irq number and linux irq type value.
*
@@ -70,7 +67,6 @@ struct irq_domain_ops {
int (*match)(struct irq_domain *d, struct device_node *node);
int (*map)(struct irq_domain *d, unsigned int virq, irq_hw_number_t hw);
void (*unmap)(struct irq_domain *d, unsigned int virq);
unsigned int (*to_irq)(struct irq_domain *d, unsigned long hwirq);
int (*xlate)(struct irq_domain *d, struct device_node *node,
const u32 *intspec, unsigned int intsize,
unsigned long *out_hwirq, unsigned int *out_type);
@@ -114,16 +110,11 @@ struct irq_domain {
void *host_data;
irq_hw_number_t inval_irq;
unsigned int irq_base;
unsigned int nr_irq;
unsigned int hwirq_base;
/* Optional device node pointer */
struct device_node *of_node;
};
#ifdef CONFIG_IRQ_DOMAIN
#ifdef CONFIG_PPC
struct irq_domain *irq_domain_add_legacy(struct device_node *of_node,
unsigned int size,
unsigned int first_irq,
@@ -153,6 +144,10 @@ static inline struct irq_domain *irq_domain_add_legacy_isa(
return irq_domain_add_legacy(of_node, NUM_ISA_INTERRUPTS, 0, 0, ops,
host_data);
}
extern struct irq_domain *irq_find_host(struct device_node *node);
extern void irq_set_default_host(struct irq_domain *host);
extern void irq_set_virq_count(unsigned int count);
extern unsigned int irq_create_mapping(struct irq_domain *host,
irq_hw_number_t hwirq);
@@ -167,38 +162,7 @@ extern unsigned int irq_radix_revmap_lookup(struct irq_domain *host,
extern unsigned int irq_linear_revmap(struct irq_domain *host,
irq_hw_number_t hwirq);
#else /* CONFIG_PPC */
/**
* irq_domain_to_irq() - Translate from a hardware irq to a linux irq number
*
* Returns the linux irq number associated with a hardware irq. By default,
* the mapping is irq == domain->irq_base + hwirq, but this mapping can
* be overridden if the irq_domain implements a .to_irq() hook.
*/
static inline unsigned int irq_domain_to_irq(struct irq_domain *d,
unsigned long hwirq)
{
if (d->ops->to_irq)
return d->ops->to_irq(d, hwirq);
if (WARN_ON(hwirq < d->hwirq_base))
return 0;
return d->irq_base + hwirq - d->hwirq_base;
}
#define irq_domain_for_each_hwirq(d, hw) \
for (hw = d->hwirq_base; hw < d->hwirq_base + d->nr_irq; hw++)
#define irq_domain_for_each_irq(d, hw, irq) \
for (hw = d->hwirq_base, irq = irq_domain_to_irq(d, hw); \
hw < d->hwirq_base + d->nr_irq; \
hw++, irq = irq_domain_to_irq(d, hw))
extern void irq_domain_add(struct irq_domain *domain);
extern void irq_domain_del(struct irq_domain *domain);
extern struct irq_domain_ops irq_domain_simple_ops;
#if defined(CONFIG_OF_IRQ)
extern void irq_domain_add_simple(struct device_node *controller, int irq_base);
extern void irq_domain_generate_simple(const struct of_device_id *match,
@@ -207,7 +171,6 @@ extern void irq_domain_generate_simple(const struct of_device_id *match,
static inline void irq_domain_generate_simple(const struct of_device_id *match,
u64 phys_base, unsigned int irq_start) { }
#endif /* !CONFIG_OF_IRQ */
#endif /* !CONFIG_PPC */
#endif /* CONFIG_IRQ_DOMAIN */
#endif /* _LINUX_IRQDOMAIN_H */