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powerpc/xics: Add support for IRQ domain hierarchy
XICS doesn't have any state associated with the IRQ. The support is straightforward and simpler than for XIVE. Signed-off-by: Cédric Le Goater <clg@kaod.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20210701132750.1475580-21-clg@kaod.org
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1 changed files with 41 additions and 0 deletions
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@ -406,7 +406,48 @@ int xics_retrigger(struct irq_data *data)
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return 0;
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}
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#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
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static int xics_host_domain_translate(struct irq_domain *d, struct irq_fwspec *fwspec,
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unsigned long *hwirq, unsigned int *type)
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{
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return xics_host_xlate(d, to_of_node(fwspec->fwnode), fwspec->param,
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fwspec->param_count, hwirq, type);
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}
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static int xics_host_domain_alloc(struct irq_domain *domain, unsigned int virq,
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unsigned int nr_irqs, void *arg)
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{
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struct irq_fwspec *fwspec = arg;
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irq_hw_number_t hwirq;
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unsigned int type = IRQ_TYPE_NONE;
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int i, rc;
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rc = xics_host_domain_translate(domain, fwspec, &hwirq, &type);
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if (rc)
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return rc;
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pr_debug("%s %d/%lx #%d\n", __func__, virq, hwirq, nr_irqs);
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for (i = 0; i < nr_irqs; i++)
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irq_domain_set_info(domain, virq + i, hwirq + i, xics_ics->chip,
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xics_ics, handle_fasteoi_irq, NULL, NULL);
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return 0;
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}
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static void xics_host_domain_free(struct irq_domain *domain,
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unsigned int virq, unsigned int nr_irqs)
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{
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pr_debug("%s %d #%d\n", __func__, virq, nr_irqs);
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}
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#endif
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static const struct irq_domain_ops xics_host_ops = {
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#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
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.alloc = xics_host_domain_alloc,
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.free = xics_host_domain_free,
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.translate = xics_host_domain_translate,
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#endif
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.match = xics_host_match,
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.map = xics_host_map,
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.xlate = xics_host_xlate,
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