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genirq/irqdomain: Add an irq_create_mapping_affinity() function
There is currently no way to convey the affinity of an interrupt
via irq_create_mapping(), which creates issues for devices that
expect that affinity to be managed by the kernel.
In order to sort this out, rename irq_create_mapping() to
irq_create_mapping_affinity() with an additional affinity parameter that
can be passed down to irq_domain_alloc_descs().
irq_create_mapping() is re-implemented as a wrapper around
irq_create_mapping_affinity().
No functional change.
Fixes: e75eafb9b0
("genirq/msi: Switch to new irq spreading infrastructure")
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Greg Kurz <groug@kaod.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20201126082852.1178497-2-lvivier@redhat.com
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@ -384,11 +384,19 @@ extern void irq_domain_associate_many(struct irq_domain *domain,
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extern void irq_domain_disassociate(struct irq_domain *domain,
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unsigned int irq);
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extern unsigned int irq_create_mapping(struct irq_domain *host,
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irq_hw_number_t hwirq);
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extern unsigned int irq_create_mapping_affinity(struct irq_domain *host,
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irq_hw_number_t hwirq,
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const struct irq_affinity_desc *affinity);
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extern unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec);
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extern void irq_dispose_mapping(unsigned int virq);
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static inline unsigned int irq_create_mapping(struct irq_domain *host,
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irq_hw_number_t hwirq)
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{
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return irq_create_mapping_affinity(host, hwirq, NULL);
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}
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/**
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* irq_linear_revmap() - Find a linux irq from a hw irq number.
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* @domain: domain owning this hardware interrupt
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@ -624,17 +624,19 @@ unsigned int irq_create_direct_mapping(struct irq_domain *domain)
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EXPORT_SYMBOL_GPL(irq_create_direct_mapping);
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/**
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* irq_create_mapping() - Map a hardware interrupt into linux irq space
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* irq_create_mapping_affinity() - Map a hardware interrupt into linux irq space
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* @domain: domain owning this hardware interrupt or NULL for default domain
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* @hwirq: hardware irq number in that domain space
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* @affinity: irq affinity
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*
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* Only one mapping per hardware interrupt is permitted. Returns a linux
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* irq number.
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* If the sense/trigger is to be specified, set_irq_type() should be called
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* on the number returned from that call.
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*/
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unsigned int irq_create_mapping(struct irq_domain *domain,
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irq_hw_number_t hwirq)
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unsigned int irq_create_mapping_affinity(struct irq_domain *domain,
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irq_hw_number_t hwirq,
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const struct irq_affinity_desc *affinity)
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{
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struct device_node *of_node;
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int virq;
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@ -660,7 +662,8 @@ unsigned int irq_create_mapping(struct irq_domain *domain,
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}
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/* Allocate a virtual interrupt number */
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virq = irq_domain_alloc_descs(-1, 1, hwirq, of_node_to_nid(of_node), NULL);
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virq = irq_domain_alloc_descs(-1, 1, hwirq, of_node_to_nid(of_node),
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affinity);
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if (virq <= 0) {
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pr_debug("-> virq allocation failed\n");
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return 0;
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@ -676,7 +679,7 @@ unsigned int irq_create_mapping(struct irq_domain *domain,
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return virq;
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}
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EXPORT_SYMBOL_GPL(irq_create_mapping);
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EXPORT_SYMBOL_GPL(irq_create_mapping_affinity);
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/**
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* irq_create_strict_mappings() - Map a range of hw irqs to fixed linux irqs
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